usr.sbin/pfctl/parse.y

   1 /*      $OpenBSD: parse.y,v 1.549 2008/07/03 16:09:34 deraadt Exp $     */
   2
   3 /*
   4  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
   5  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
   6  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
   7  * Copyright (c) 2002,2003 Henning Brauer. All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29 %{
  30 #include <sys/types.h>
  31 #include <sys/socket.h>
  32 #include <sys/stat.h>
  33 #include <net/if.h>
  34 #include <netinet/in.h>
  35 #include <netinet/in_systm.h>
  36 #include <netinet/ip.h>
  37 #include <netinet/ip_icmp.h>
  38 #include <netinet/icmp6.h>
  39 #include <net/pf/pfvar.h>
  40 #include <arpa/inet.h>
  41 #include <net/altq/altq.h>
  42 #include <net/altq/altq_cbq.h>
  43 #include <net/altq/altq_priq.h>
  44 #include <net/altq/altq_hfsc.h>
  45 #include <net/altq/altq_fairq.h>
  46
  47 #include <stdio.h>
  48 #include <unistd.h>
  49 #include <stdlib.h>
  50 #include <netdb.h>
  51 #include <stdarg.h>
  52 #include <errno.h>
  53 #include <string.h>
  54 #include <ctype.h>
  55 #include <math.h>
  56 #include <err.h>
  57 #include <limits.h>
  58 #include <pwd.h>
  59 #include <grp.h>
  60 #include <md5.h>
  61 #include <inttypes.h>
  62
  63 #include "pfctl_parser.h"
  64 #include "pfctl.h"
  65
  66 static struct pfctl     *pf = NULL;
  67 static int               debug = 0;
  68 static int               rulestate = 0;
  69 static u_int16_t         returnicmpdefault =
  70                             (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
  71 static u_int16_t         returnicmp6default =
  72                             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
  73 static int               blockpolicy = PFRULE_DROP;
  74 static int               require_order = 1;
  75 static int               default_statelock;
  76 static int               default_keeppolicy_action;
  77 static struct node_state_opt *default_keeppolicy_options;
  78
  79 TAILQ_HEAD(files, file)          files = TAILQ_HEAD_INITIALIZER(files);
  80 static struct file {
  81         TAILQ_ENTRY(file)        entry;
  82         FILE                    *stream;
  83         char                    *name;
  84         int                      lineno;
  85         int                      errors;
  86 } *file;
  87 struct file     *pushfile(const char *, int);
  88 int              popfile(void);
  89 int              check_file_secrecy(int, const char *);
  90 int              yylex(void);
  91 int              yyerror(const char *, ...) __printflike(1, 2);
  92 int              kw_cmp(const void *, const void *);
  93 int              lookup(char *);
  94 int              lgetc(int);
  95 int              lungetc(int);
  96 int              findeol(void);
  97
  98 TAILQ_HEAD(symhead, sym)         symhead = TAILQ_HEAD_INITIALIZER(symhead);
  99 struct sym {
 100         TAILQ_ENTRY(sym)         entry;
 101         int                      used;
 102         int                      persist;
 103         char                    *nam;
 104         char                    *val;
 105 };
 106 int              symset(const char *, const char *, int);
 107 char            *symget(const char *);
 108
 109 int              atoul(char *, u_long *);
 110
 111 enum {
 112         PFCTL_STATE_NONE,
 113         PFCTL_STATE_OPTION,
 114         PFCTL_STATE_SCRUB,
 115         PFCTL_STATE_QUEUE,
 116         PFCTL_STATE_NAT,
 117         PFCTL_STATE_FILTER
 118 };
 119
 120 struct node_proto {
 121         u_int8_t                 proto;
 122         struct node_proto       *next;
 123         struct node_proto       *tail;
 124 };
 125
 126 struct node_port {
 127         u_int16_t                port[2];
 128         u_int8_t                 op;
 129         struct node_port        *next;
 130         struct node_port        *tail;
 131 };
 132
 133 struct node_uid {
 134         uid_t                    uid[2];
 135         u_int8_t                 op;
 136         struct node_uid         *next;
 137         struct node_uid         *tail;
 138 };
 139
 140 struct node_gid {
 141         gid_t                    gid[2];
 142         u_int8_t                 op;
 143         struct node_gid         *next;
 144         struct node_gid         *tail;
 145 };
 146
 147 struct node_icmp {
 148         u_int8_t                 code;
 149         u_int8_t                 type;
 150         u_int8_t                 proto;
 151         struct node_icmp        *next;
 152         struct node_icmp        *tail;
 153 };
 154
 155 enum    { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
 156             PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
 157             PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
 158             PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
 159             PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, PF_STATE_OPT_PICKUPS };
 160
 161 enum    { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
 162
 163 struct node_state_opt {
 164         int                      type;
 165         union {
 166                 u_int32_t        max_states;
 167                 u_int32_t        max_src_states;
 168                 u_int32_t        max_src_conn;
 169                 struct {
 170                         u_int32_t       limit;
 171                         u_int32_t       seconds;
 172                 }                max_src_conn_rate;
 173                 struct {
 174                         u_int8_t        flush;
 175                         char            tblname[PF_TABLE_NAME_SIZE];
 176                 }                overload;
 177                 u_int32_t        max_src_nodes;
 178                 u_int8_t         src_track;
 179                 u_int8_t         pickup_mode;
 180                 u_int32_t        statelock;
 181                 struct {
 182                         int             number;
 183                         u_int32_t       seconds;
 184                 }                timeout;
 185         }                        data;
 186         struct node_state_opt   *next;
 187         struct node_state_opt   *tail;
 188 };
 189
 190 struct peer {
 191         struct node_host        *host;
 192         struct node_port        *port;
 193 };
 194
 195 struct node_queue {
 196         char                     queue[PF_QNAME_SIZE];
 197         char                     parent[PF_QNAME_SIZE];
 198         char                     ifname[IFNAMSIZ];
 199         int                      scheduler;
 200         struct node_queue       *next;
 201         struct node_queue       *tail;
 202 }       *queues = NULL;
 203
 204 struct node_qassign {
 205         char            *qname;
 206         char            *pqname;
 207 };
 208
 209 struct filter_opts {
 210         int                      marker;
 211 #define FOM_FLAGS       0x01
 212 #define FOM_ICMP        0x02
 213 #define FOM_TOS         0x04
 214 #define FOM_KEEP        0x08
 215 #define FOM_SRCTRACK    0x10
 216         struct node_uid         *uid;
 217         struct node_gid         *gid;
 218         struct {
 219                 u_int8_t         b1;
 220                 u_int8_t         b2;
 221                 u_int16_t        w;
 222                 u_int16_t        w2;
 223         } flags;
 224         struct node_icmp        *icmpspec;
 225         u_int32_t                tos;
 226         u_int32_t                prob;
 227         struct {
 228                 int                      action;
 229                 struct node_state_opt   *options;
 230         } keep;
 231         int                      fragment;
 232         int                      allowopts;
 233         char                    *label;
 234         struct node_qassign      queues;
 235         char                    *tag;
 236         char                    *match_tag;
 237         u_int8_t                 match_tag_not;
 238         u_int                    rtableid;
 239         struct {
 240                 struct node_host        *addr;
 241                 u_int16_t               port;
 242         }                        divert;
 243 } filter_opts;
 244
 245 struct antispoof_opts {
 246         char                    *label;
 247         u_int                    rtableid;
 248 } antispoof_opts;
 249
 250 struct scrub_opts {
 251         int                     marker;
 252 #define SOM_MINTTL      0x01
 253 #define SOM_MAXMSS      0x02
 254 #define SOM_FRAGCACHE   0x04
 255 #define SOM_SETTOS      0x08
 256         int                     nodf;
 257         int                     minttl;
 258         int                     maxmss;
 259         int                     settos;
 260         int                     fragcache;
 261         int                     randomid;
 262         int                     reassemble_tcp;
 263         char                   *match_tag;
 264         u_int8_t                match_tag_not;
 265         u_int                   rtableid;
 266 } scrub_opts;
 267
 268 struct queue_opts {
 269         int                     marker;
 270 #define QOM_BWSPEC      0x01
 271 #define QOM_SCHEDULER   0x02
 272 #define QOM_PRIORITY    0x04
 273 #define QOM_TBRSIZE     0x08
 274 #define QOM_QLIMIT      0x10
 275         struct node_queue_bw    queue_bwspec;
 276         struct node_queue_opt   scheduler;
 277         int                     priority;
 278         int                     tbrsize;
 279         int                     qlimit;
 280 } queue_opts;
 281
 282 struct table_opts {
 283         int                     flags;
 284         int                     init_addr;
 285         struct node_tinithead   init_nodes;
 286 } table_opts;
 287
 288 struct pool_opts {
 289         int                      marker;
 290 #define POM_TYPE                0x01
 291 #define POM_STICKYADDRESS       0x02
 292         u_int8_t                 opts;
 293         int                      type;
 294         int                      staticport;
 295         struct pf_poolhashkey   *key;
 296
 297 } pool_opts;
 298
 299
 300 struct node_hfsc_opts   hfsc_opts;
 301 struct node_fairq_opts  fairq_opts;
 302
 303 int              disallow_table(struct node_host *, const char *);
 304 int              disallow_urpf_failed(struct node_host *, const char *);
 305 int              disallow_alias(struct node_host *, const char *);
 306 int              rule_consistent(struct pf_rule *, int);
 307 int              filter_consistent(struct pf_rule *, int);
 308 int              nat_consistent(struct pf_rule *);
 309 int              rdr_consistent(struct pf_rule *);
 310 int              process_tabledef(char *, struct table_opts *);
 311 void             expand_label_str(char *, size_t, const char *, const char *);
 312 void             expand_label_if(const char *, char *, size_t, const char *);
 313 void             expand_label_addr(const char *, char *, size_t, u_int8_t,
 314                     struct node_host *);
 315 void             expand_label_port(const char *, char *, size_t,
 316                     struct node_port *);
 317 void             expand_label_proto(const char *, char *, size_t, u_int8_t);
 318 void             expand_label_nr(const char *, char *, size_t);
 319 void             expand_label(char *, size_t, const char *, u_int8_t,
 320                     struct node_host *, struct node_port *, struct node_host *,
 321                     struct node_port *, u_int8_t);
 322 void             expand_rule(struct pf_rule *, struct node_if *,
 323                     struct node_host *, struct node_proto *, struct node_os *,
 324                     struct node_host *, struct node_port *, struct node_host *,
 325                     struct node_port *, struct node_uid *, struct node_gid *,
 326                     struct node_icmp *, const char *);
 327 int              expand_altq(struct pf_altq *, struct node_if *,
 328                     struct node_queue *, struct node_queue_bw bwspec,
 329                     struct node_queue_opt *);
 330 int              expand_queue(struct pf_altq *, struct node_if *,
 331                     struct node_queue *, struct node_queue_bw,
 332                     struct node_queue_opt *);
 333 int              expand_skip_interface(struct node_if *);
 334
 335 int      check_rulestate(int);
 336 int      getservice(char *);
 337 int      rule_label(struct pf_rule *, char *);
 338
 339 void     mv_rules(struct pf_ruleset *, struct pf_ruleset *);
 340 void     decide_address_family(struct node_host *, sa_family_t *);
 341 void     remove_invalid_hosts(struct node_host **, sa_family_t *);
 342 int      invalid_redirect(struct node_host *, sa_family_t);
 343 u_int16_t parseicmpspec(char *, sa_family_t);
 344
 345 TAILQ_HEAD(loadanchorshead, loadanchors)
 346     loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
 347
 348 struct loadanchors {
 349         TAILQ_ENTRY(loadanchors)         entries;
 350         char                            *anchorname;
 351         char                            *filename;
 352 };
 353
 354 typedef struct {
 355         union {
 356                 int64_t                  number;
 357                 double                   probability;
 358                 int                      i;
 359                 char                    *string;
 360                 u_int                    rtableid;
 361                 struct {
 362                         u_int8_t         b1;
 363                         u_int8_t         b2;
 364                         u_int16_t        w;
 365                         u_int16_t        w2;
 366                 }                        b;
 367                 struct range {
 368                         int              a;
 369                         int              b;
 370                         int              t;
 371                 }                        range;
 372                 struct node_if          *interface;
 373                 struct node_proto       *proto;
 374                 struct node_icmp        *icmp;
 375                 struct node_host        *host;
 376                 struct node_os          *os;
 377                 struct node_port        *port;
 378                 struct node_uid         *uid;
 379                 struct node_gid         *gid;
 380                 struct node_state_opt   *state_opt;
 381                 struct peer              peer;
 382                 struct {
 383                         struct peer      src, dst;
 384                         struct node_os  *src_os;
 385                 }                        fromto;
 386                 struct {
 387                         struct node_host        *host;
 388                         u_int8_t                 rt;
 389                         u_int8_t                 pool_opts;
 390                         sa_family_t              af;
 391                         struct pf_poolhashkey   *key;
 392                 }                        route;
 393                 struct redirection {
 394                         struct node_host        *host;
 395                         struct range             rport;
 396                 }                       *redirection;
 397                 struct {
 398                         int                      action;
 399                         struct node_state_opt   *options;
 400                 }                        keep_state;
 401                 struct {
 402                         u_int8_t         log;
 403                         u_int8_t         logif;
 404                         u_int8_t         quick;
 405                 }                        logquick;
 406                 struct {
 407                         int              neg;
 408                         char            *name;
 409                 }                        tagged;
 410                 struct pf_poolhashkey   *hashkey;
 411                 struct node_queue       *queue;
 412                 struct node_queue_opt    queue_options;
 413                 struct node_queue_bw     queue_bwspec;
 414                 struct node_qassign      qassign;
 415                 struct filter_opts       filter_opts;
 416                 struct antispoof_opts    antispoof_opts;
 417                 struct queue_opts        queue_opts;
 418                 struct scrub_opts        scrub_opts;
 419                 struct table_opts        table_opts;
 420                 struct pool_opts         pool_opts;
 421                 struct node_hfsc_opts    hfsc_opts;
 422                 struct node_fairq_opts   fairq_opts;
 423         } v;
 424         int lineno;
 425 } YYSTYPE;
 426
 427 #define PPORT_RANGE     1
 428 #define PPORT_STAR      2
 429 int     parseport(char *, struct range *r, int);
 430
 431 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
 432         (!((addr).iflags & PFI_AFLAG_NOALIAS) ||                 \
 433         !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
 434
 435 extern char     *infile;
 436
 437 %}
 438
 439 %token  PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
 440 %token  RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
 441 %token  ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
 442 %token  MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
 443 %token  NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
 444 %token  REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
 445 %token  SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
 446 %token  REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
 447 %token  ANTISPOOF FOR INCLUDE
 448 %token  BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY
 449 %token  ALTQ CBQ PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT
 450 %token  QUEUE PRIORITY QLIMIT RTABLE HOGS BUCKETS
 451 %token  LOAD RULESET_OPTIMIZATION
 452 %token  PICKUPS NOPICKUPS HASHONLY
 453 %token  STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
 454 %token  MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY
 455 %token  TAGGED TAG IFBOUND FLOATING STATEPOLICY ROUTE SETTOS KEEPPOLICY
 456 %token  DIVERTTO DIVERTREPLY
 457 %token  <v.string>              STRING
 458 %token  <v.number>              NUMBER
 459 %token  <v.i>                   PORTBINARY
 460 %type   <v.interface>           interface if_list if_item_not if_item
 461 %type   <v.number>              number icmptype icmp6type uid gid
 462 %type   <v.number>              tos not yesno
 463 %type   <v.probability>         probability
 464 %type   <v.i>                   no dir af fragcache optimizer
 465 %type   <v.i>                   sourcetrack flush unaryop statelock
 466 %type   <v.b>                   action nataction natpasslog scrubaction
 467 %type   <v.b>                   flags flag blockspec
 468 %type   <v.range>               portplain portstar portrange
 469 %type   <v.hashkey>             hashkey
 470 %type   <v.proto>               proto proto_list proto_item
 471 %type   <v.number>              protoval
 472 %type   <v.icmp>                icmpspec
 473 %type   <v.icmp>                icmp_list icmp_item
 474 %type   <v.icmp>                icmp6_list icmp6_item
 475 %type   <v.number>              reticmpspec reticmp6spec
 476 %type   <v.fromto>              fromto
 477 %type   <v.peer>                ipportspec from to
 478 %type   <v.host>                ipspec toipspec xhost host dynaddr host_list
 479 %type   <v.host>                redir_host_list redirspec
 480 %type   <v.host>                route_host route_host_list routespec
 481 %type   <v.os>                  os xos os_list
 482 %type   <v.port>                portspec port_list port_item
 483 %type   <v.uid>                 uids uid_list uid_item
 484 %type   <v.gid>                 gids gid_list gid_item
 485 %type   <v.route>               route
 486 %type   <v.redirection>         redirection redirpool
 487 %type   <v.string>              label stringall tag anchorname
 488 %type   <v.string>              string varstring numberstring
 489 %type   <v.keep_state>          keep
 490 %type   <v.state_opt>           state_opt_spec state_opt_list state_opt_item
 491 %type   <v.logquick>            logquick quick log logopts logopt
 492 %type   <v.interface>           antispoof_ifspc antispoof_iflst antispoof_if
 493 %type   <v.qassign>             qname
 494 %type   <v.queue>               qassign qassign_list qassign_item
 495 %type   <v.queue_options>       scheduler
 496 %type   <v.number>              cbqflags_list cbqflags_item
 497 %type   <v.number>              priqflags_list priqflags_item
 498 %type   <v.hfsc_opts>           hfscopts_list hfscopts_item hfsc_opts
 499 %type   <v.fairq_opts>          fairqopts_list fairqopts_item fairq_opts
 500 %type   <v.queue_bwspec>        bandwidth
 501 %type   <v.filter_opts>         filter_opts filter_opt filter_opts_l
 502 %type   <v.antispoof_opts>      antispoof_opts antispoof_opt antispoof_opts_l
 503 %type   <v.queue_opts>          queue_opts queue_opt queue_opts_l
 504 %type   <v.scrub_opts>          scrub_opts scrub_opt scrub_opts_l
 505 %type   <v.table_opts>          table_opts table_opt table_opts_l
 506 %type   <v.pool_opts>           pool_opts pool_opt pool_opts_l
 507 %type   <v.tagged>              tagged
 508 %type   <v.rtableid>            rtable
 509 %%
 510
 511 ruleset         : /* empty */
 512                 | ruleset include '\n'
 513                 | ruleset '\n'
 514                 | ruleset option '\n'
 515                 | ruleset scrubrule '\n'
 516                 | ruleset natrule '\n'
 517                 | ruleset binatrule '\n'
 518                 | ruleset pfrule '\n'
 519                 | ruleset anchorrule '\n'
 520                 | ruleset loadrule '\n'
 521                 | ruleset altqif '\n'
 522                 | ruleset queuespec '\n'
 523                 | ruleset varset '\n'
 524                 | ruleset antispoof '\n'
 525                 | ruleset tabledef '\n'
 526                 | '{' fakeanchor '}' '\n';
 527                 | ruleset error '\n'            { file->errors++; }
 528                 ;
 529
 530 include         : INCLUDE STRING                {
 531                         struct file     *nfile;
 532
 533                         if ((nfile = pushfile($2, 0)) == NULL) {
 534                                 yyerror("failed to include file %s", $2);
 535                                 free($2);
 536                                 YYERROR;
 537                         }
 538                         free($2);
 539
 540                         file = nfile;
 541                         lungetc('\n');
 542                 }
 543                 ;
 544
 545 /*
 546  * apply to previouslys specified rule: must be careful to note
 547  * what that is: pf or nat or binat or rdr
 548  */
 549 fakeanchor      : fakeanchor '\n'
 550                 | fakeanchor anchorrule '\n'
 551                 | fakeanchor binatrule '\n'
 552                 | fakeanchor natrule '\n'
 553                 | fakeanchor pfrule '\n'
 554                 | fakeanchor error '\n'
 555                 ;
 556
 557 optimizer       : string        {
 558                         if (!strcmp($1, "none"))
 559                                 $$ = 0;
 560                         else if (!strcmp($1, "basic"))
 561                                 $$ = PF_OPTIMIZE_BASIC;
 562                         else if (!strcmp($1, "profile"))
 563                                 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
 564                         else {
 565                                 yyerror("unknown ruleset-optimization %s", $1);
 566                                 YYERROR;
 567                         }
 568                 }
 569                 ;
 570
 571 option          : SET OPTIMIZATION STRING               {
 572                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 573                                 free($3);
 574                                 YYERROR;
 575                         }
 576                         if (pfctl_set_optimization(pf, $3) != 0) {
 577                                 yyerror("unknown optimization %s", $3);
 578                                 free($3);
 579                                 YYERROR;
 580                         }
 581                         free($3);
 582                 }
 583                 | SET RULESET_OPTIMIZATION optimizer {
 584                         if (!(pf->opts & PF_OPT_OPTIMIZE)) {
 585                                 pf->opts |= PF_OPT_OPTIMIZE;
 586                                 pf->optimize = $3;
 587                         }
 588                 }
 589                 | SET TIMEOUT timeout_spec
 590                 | SET TIMEOUT '{' optnl timeout_list '}'
 591                 | SET LIMIT limit_spec
 592                 | SET LIMIT '{' optnl limit_list '}'
 593                 | SET LOGINTERFACE stringall            {
 594                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 595                                 free($3);
 596                                 YYERROR;
 597                         }
 598                         if (pfctl_set_logif(pf, $3) != 0) {
 599                                 yyerror("error setting loginterface %s", $3);
 600                                 free($3);
 601                                 YYERROR;
 602                         }
 603                         free($3);
 604                 }
 605                 | SET HOSTID number {
 606                         if ($3 == 0 || $3 > UINT_MAX) {
 607                                 yyerror("hostid must be non-zero");
 608                                 YYERROR;
 609                         }
 610                         if (pfctl_set_hostid(pf, $3) != 0) {
 611                                 yyerror("error setting hostid %08" PRId64, $3);
 612                                 YYERROR;
 613                         }
 614                 }
 615                 | SET BLOCKPOLICY DROP  {
 616                         if (pf->opts & PF_OPT_VERBOSE)
 617                                 printf("set block-policy drop\n");
 618                         if (check_rulestate(PFCTL_STATE_OPTION))
 619                                 YYERROR;
 620                         blockpolicy = PFRULE_DROP;
 621                 }
 622                 | SET BLOCKPOLICY RETURN {
 623                         if (pf->opts & PF_OPT_VERBOSE)
 624                                 printf("set block-policy return\n");
 625                         if (check_rulestate(PFCTL_STATE_OPTION))
 626                                 YYERROR;
 627                         blockpolicy = PFRULE_RETURN;
 628                 }
 629                 | SET REQUIREORDER yesno {
 630                         if (pf->opts & PF_OPT_VERBOSE)
 631                                 printf("set require-order %s\n",
 632                                     $3 == 1 ? "yes" : "no");
 633                         require_order = $3;
 634                 }
 635                 | SET FINGERPRINTS STRING {
 636                         if (pf->opts & PF_OPT_VERBOSE)
 637                                 printf("set fingerprints \"%s\"\n", $3);
 638                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 639                                 free($3);
 640                                 YYERROR;
 641                         }
 642                         if (!pf->anchor->name[0]) {
 643                                 if (pfctl_file_fingerprints(pf->dev,
 644                                     pf->opts, $3)) {
 645                                         yyerror("error loading "
 646                                             "fingerprints %s", $3);
 647                                         free($3);
 648                                         YYERROR;
 649                                 }
 650                         }
 651                         free($3);
 652                 }
 653                 | SET STATEPOLICY statelock {
 654                         if (pf->opts & PF_OPT_VERBOSE)
 655                                 switch ($3) {
 656                                 case 0:
 657                                         printf("set state-policy floating\n");
 658                                         break;
 659                                 case PFRULE_IFBOUND:
 660                                         printf("set state-policy if-bound\n");
 661                                         break;
 662                                 }
 663                         default_statelock = $3;
 664                 }
 665                 | SET KEEPPOLICY keep {
 666                         if (pf->opts & PF_OPT_VERBOSE)
 667                                 printf("A default keeppolicy was set\n");
 668                         default_keeppolicy_action  = $3.action;
 669                         default_keeppolicy_options = $3.options;
 670                 }
 671                 | SET DEBUG STRING {
 672                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 673                                 free($3);
 674                                 YYERROR;
 675                         }
 676                         if (pfctl_set_debug(pf, $3) != 0) {
 677                                 yyerror("error setting debuglevel %s", $3);
 678                                 free($3);
 679                                 YYERROR;
 680                         }
 681                         free($3);
 682                 }
 683                 | SET SKIP interface {
 684                         if (expand_skip_interface($3) != 0) {
 685                                 yyerror("error setting skip interface(s)");
 686                                 YYERROR;
 687                         }
 688                 }
 689                 ;
 690
 691 stringall       : STRING        { $$ = $1; }
 692                 | ALL           {
 693                         if (($$ = strdup("all")) == NULL) {
 694                                 err(1, "stringall: strdup");
 695                         }
 696                 }
 697                 ;
 698
 699 string          : STRING string                         {
 700                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 701                                 err(1, "string: asprintf");
 702                         free($1);
 703                         free($2);
 704                 }
 705                 | STRING
 706                 ;
 707
 708 varstring       : numberstring varstring                {
 709                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 710                                 err(1, "string: asprintf");
 711                         free($1);
 712                         free($2);
 713                 }
 714                 | numberstring
 715                 ;
 716
 717 numberstring    : NUMBER                                {
 718                         char    *s;
 719                         if (asprintf(&s, "%" PRId64, $1) == -1) {
 720                                 yyerror("string: asprintf");
 721                                 YYERROR;
 722                         }
 723                         $$ = s;
 724                 }
 725                 | STRING
 726                 ;
 727
 728 varset          : STRING '=' varstring  {
 729                         if (pf->opts & PF_OPT_VERBOSE)
 730                                 printf("%s = \"%s\"\n", $1, $3);
 731                         if (symset($1, $3, 0) == -1)
 732                                 err(1, "cannot store variable %s", $1);
 733                         free($1);
 734                         free($3);
 735                 }
 736                 ;
 737
 738 anchorname      : STRING                        { $$ = $1; }
 739                 | /* empty */                   { $$ = NULL; }
 740                 ;
 741
 742 pfa_anchorlist  : /* empty */
 743                 | pfa_anchorlist '\n'
 744                 | pfa_anchorlist pfrule '\n'
 745                 | pfa_anchorlist anchorrule '\n'
 746                 ;
 747
 748 pfa_anchor      : '{'
 749                 {
 750                         char ta[PF_ANCHOR_NAME_SIZE];
 751                         struct pf_ruleset *rs;
 752
 753                         /* steping into a brace anchor */
 754                         pf->asd++;
 755                         pf->bn++;
 756                         pf->brace = 1;
 757
 758                         /* create a holding ruleset in the root */
 759                         snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
 760                         rs = pf_find_or_create_ruleset(ta);
 761                         if (rs == NULL)
 762                                 err(1, "pfa_anchor: pf_find_or_create_ruleset");
 763                         pf->astack[pf->asd] = rs->anchor;
 764                         pf->anchor = rs->anchor;
 765                 } '\n' pfa_anchorlist '}'
 766                 {
 767                         pf->alast = pf->anchor;
 768                         pf->asd--;
 769                         pf->anchor = pf->astack[pf->asd];
 770                 }
 771                 | /* empty */
 772                 ;
 773
 774 anchorrule      : ANCHOR anchorname dir quick interface af proto fromto
 775                     filter_opts pfa_anchor
 776                 {
 777                         struct pf_rule  r;
 778                         struct node_proto       *proto;
 779
 780                         if (check_rulestate(PFCTL_STATE_FILTER)) {
 781                                 if ($2)
 782                                         free($2);
 783                                 YYERROR;
 784                         }
 785
 786                         if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
 787                                 free($2);
 788                                 yyerror("anchor names beginning with '_' "
 789                                     "are reserved for internal use");
 790                                 YYERROR;
 791                         }
 792
 793                         memset(&r, 0, sizeof(r));
 794                         if (pf->astack[pf->asd + 1]) {
 795                                 /* move inline rules into relative location */
 796                                 pf_anchor_setup(&r,
 797                                     &pf->astack[pf->asd]->ruleset,
 798                                     $2 ? $2 : pf->alast->name);
 799
 800                                 if (r.anchor == NULL)
 801                                         err(1, "anchorrule: unable to "
 802                                             "create ruleset");
 803
 804                                 if (pf->alast != r.anchor) {
 805                                         if (r.anchor->match) {
 806                                                 yyerror("inline anchor '%s' "
 807                                                     "already exists",
 808                                                     r.anchor->name);
 809                                                 YYERROR;
 810                                         }
 811                                         mv_rules(&pf->alast->ruleset,
 812                                             &r.anchor->ruleset);
 813                                 }
 814                                 pf_remove_if_empty_ruleset(&pf->alast->ruleset);
 815                                 pf->alast = r.anchor;
 816                         } else {
 817                                 if (!$2) {
 818                                         yyerror("anchors without explicit "
 819                                             "rules must specify a name");
 820                                         YYERROR;
 821                                 }
 822                         }
 823                         r.direction = $3;
 824                         r.quick = $4.quick;
 825                         r.af = $6;
 826                         r.prob = $9.prob;
 827                         r.rtableid = $9.rtableid;
 828
 829                         if ($9.tag)
 830                                 if (strlcpy(r.tagname, $9.tag,
 831                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 832                                         yyerror("tag too long, max %u chars",
 833                                             PF_TAG_NAME_SIZE - 1);
 834                                         YYERROR;
 835                                 }
 836                         if ($9.match_tag)
 837                                 if (strlcpy(r.match_tagname, $9.match_tag,
 838                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 839                                         yyerror("tag too long, max %u chars",
 840                                             PF_TAG_NAME_SIZE - 1);
 841                                         YYERROR;
 842                                 }
 843                         r.match_tag_not = $9.match_tag_not;
 844                         if (rule_label(&r, $9.label))
 845                                 YYERROR;
 846                         free($9.label);
 847                         r.flags = $9.flags.b1;
 848                         r.flagset = $9.flags.b2;
 849                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
 850                                 yyerror("flags always false");
 851                                 YYERROR;
 852                         }
 853                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
 854                                 for (proto = $7; proto != NULL &&
 855                                     proto->proto != IPPROTO_TCP;
 856                                     proto = proto->next)
 857                                         ;       /* nothing */
 858                                 if (proto == NULL && $7 != NULL) {
 859                                         if ($9.flags.b1 || $9.flags.b2)
 860                                                 yyerror(
 861                                                     "flags only apply to tcp");
 862                                         if ($8.src_os)
 863                                                 yyerror(
 864                                                     "OS fingerprinting only "
 865                                                     "applies to tcp");
 866                                         YYERROR;
 867                                 }
 868                         }
 869
 870                         r.tos = $9.tos;
 871
 872                         if ($9.keep.action) {
 873                                 yyerror("cannot specify state handling "
 874                                     "on anchors");
 875                                 YYERROR;
 876                         }
 877
 878                         if ($9.match_tag)
 879                                 if (strlcpy(r.match_tagname, $9.match_tag,
 880                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 881                                         yyerror("tag too long, max %u chars",
 882                                             PF_TAG_NAME_SIZE - 1);
 883                                         YYERROR;
 884                                 }
 885                         r.match_tag_not = $9.match_tag_not;
 886
 887                         decide_address_family($8.src.host, &r.af);
 888                         decide_address_family($8.dst.host, &r.af);
 889
 890                         expand_rule(&r, $5, NULL, $7, $8.src_os,
 891                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
 892                             $9.uid, $9.gid, $9.icmpspec,
 893                             pf->astack[pf->asd + 1] ? pf->alast->name : $2);
 894                         free($2);
 895                         pf->astack[pf->asd + 1] = NULL;
 896                 }
 897                 | NATANCHOR string interface af proto fromto rtable {
 898                         struct pf_rule  r;
 899
 900                         if (check_rulestate(PFCTL_STATE_NAT)) {
 901                                 free($2);
 902                                 YYERROR;
 903                         }
 904
 905                         memset(&r, 0, sizeof(r));
 906                         r.action = PF_NAT;
 907                         r.af = $4;
 908                         r.rtableid = $7;
 909
 910                         decide_address_family($6.src.host, &r.af);
 911                         decide_address_family($6.dst.host, &r.af);
 912
 913                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 914                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 915                             0, 0, 0, $2);
 916                         free($2);
 917                 }
 918                 | RDRANCHOR string interface af proto fromto rtable {
 919                         struct pf_rule  r;
 920
 921                         if (check_rulestate(PFCTL_STATE_NAT)) {
 922                                 free($2);
 923                                 YYERROR;
 924                         }
 925
 926                         memset(&r, 0, sizeof(r));
 927                         r.action = PF_RDR;
 928                         r.af = $4;
 929                         r.rtableid = $7;
 930
 931                         decide_address_family($6.src.host, &r.af);
 932                         decide_address_family($6.dst.host, &r.af);
 933
 934                         if ($6.src.port != NULL) {
 935                                 yyerror("source port parameter not supported"
 936                                     " in rdr-anchor");
 937                                 YYERROR;
 938                         }
 939                         if ($6.dst.port != NULL) {
 940                                 if ($6.dst.port->next != NULL) {
 941                                         yyerror("destination port list "
 942                                             "expansion not supported in "
 943                                             "rdr-anchor");
 944                                         YYERROR;
 945                                 } else if ($6.dst.port->op != PF_OP_EQ) {
 946                                         yyerror("destination port operators"
 947                                             " not supported in rdr-anchor");
 948                                         YYERROR;
 949                                 }
 950                                 r.dst.port[0] = $6.dst.port->port[0];
 951                                 r.dst.port[1] = $6.dst.port->port[1];
 952                                 r.dst.port_op = $6.dst.port->op;
 953                         }
 954
 955                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 956                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 957                             0, 0, 0, $2);
 958                         free($2);
 959                 }
 960                 | BINATANCHOR string interface af proto fromto rtable {
 961                         struct pf_rule  r;
 962
 963                         if (check_rulestate(PFCTL_STATE_NAT)) {
 964                                 free($2);
 965                                 YYERROR;
 966                         }
 967
 968                         memset(&r, 0, sizeof(r));
 969                         r.action = PF_BINAT;
 970                         r.af = $4;
 971                         r.rtableid = $7;
 972                         if ($5 != NULL) {
 973                                 if ($5->next != NULL) {
 974                                         yyerror("proto list expansion"
 975                                             " not supported in binat-anchor");
 976                                         YYERROR;
 977                                 }
 978                                 r.proto = $5->proto;
 979                                 free($5);
 980                         }
 981
 982                         if ($6.src.host != NULL || $6.src.port != NULL ||
 983                             $6.dst.host != NULL || $6.dst.port != NULL) {
 984                                 yyerror("fromto parameter not supported"
 985                                     " in binat-anchor");
 986                                 YYERROR;
 987                         }
 988
 989                         decide_address_family($6.src.host, &r.af);
 990                         decide_address_family($6.dst.host, &r.af);
 991
 992                         pfctl_add_rule(pf, &r, $2);
 993                         free($2);
 994                 }
 995                 ;
 996
 997 loadrule        : LOAD ANCHOR string FROM string        {
 998                         struct loadanchors      *loadanchor;
 999
1000                         if (strlen(pf->anchor->name) + 1 +
1001                             strlen($3) >= MAXPATHLEN) {
1002                                 yyerror("anchorname %s too long, max %u\n",
1003                                     $3, MAXPATHLEN - 1);
1004                                 free($3);
1005                                 YYERROR;
1006                         }
1007                         loadanchor = calloc(1, sizeof(struct loadanchors));
1008                         if (loadanchor == NULL)
1009                                 err(1, "loadrule: calloc");
1010                         if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1011                             NULL)
1012                                 err(1, "loadrule: malloc");
1013                         if (pf->anchor->name[0])
1014                                 snprintf(loadanchor->anchorname, MAXPATHLEN,
1015                                     "%s/%s", pf->anchor->name, $3);
1016                         else
1017                                 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1018                         if ((loadanchor->filename = strdup($5)) == NULL)
1019                                 err(1, "loadrule: strdup");
1020
1021                         TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1022                             entries);
1023
1024                         free($3);
1025                         free($5);
1026                 };
1027
1028 scrubaction     : no SCRUB {
1029                         $$.b2 = $$.w = 0;
1030                         if ($1)
1031                                 $$.b1 = PF_NOSCRUB;
1032                         else
1033                                 $$.b1 = PF_SCRUB;
1034                 }
1035                 ;
1036
1037 scrubrule       : scrubaction dir logquick interface af proto fromto scrub_opts
1038                 {
1039                         struct pf_rule  r;
1040
1041                         if (check_rulestate(PFCTL_STATE_SCRUB))
1042                                 YYERROR;
1043
1044                         memset(&r, 0, sizeof(r));
1045
1046                         r.action = $1.b1;
1047                         r.direction = $2;
1048
1049                         r.log = $3.log;
1050                         r.logif = $3.logif;
1051                         if ($3.quick) {
1052                                 yyerror("scrub rules do not support 'quick'");
1053                                 YYERROR;
1054                         }
1055
1056                         r.af = $5;
1057                         if ($8.nodf)
1058                                 r.rule_flag |= PFRULE_NODF;
1059                         if ($8.randomid)
1060                                 r.rule_flag |= PFRULE_RANDOMID;
1061                         if ($8.reassemble_tcp) {
1062                                 if (r.direction != PF_INOUT) {
1063                                         yyerror("reassemble tcp rules can not "
1064                                             "specify direction");
1065                                         YYERROR;
1066                                 }
1067                                 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1068                         }
1069                         if ($8.minttl)
1070                                 r.min_ttl = $8.minttl;
1071                         if ($8.maxmss)
1072                                 r.max_mss = $8.maxmss;
1073                         if ($8.marker & SOM_SETTOS) {
1074                                 r.rule_flag |= PFRULE_SET_TOS;
1075                                 r.set_tos = $8.settos;
1076                         }
1077                         if ($8.fragcache)
1078                                 r.rule_flag |= $8.fragcache;
1079                         if ($8.match_tag)
1080                                 if (strlcpy(r.match_tagname, $8.match_tag,
1081                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1082                                         yyerror("tag too long, max %u chars",
1083                                             PF_TAG_NAME_SIZE - 1);
1084                                         YYERROR;
1085                                 }
1086                         r.match_tag_not = $8.match_tag_not;
1087                         r.rtableid = $8.rtableid;
1088
1089                         expand_rule(&r, $4, NULL, $6, $7.src_os,
1090                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
1091                             NULL, NULL, NULL, "");
1092                 }
1093                 ;
1094
1095 scrub_opts      :       {
1096                                 bzero(&scrub_opts, sizeof scrub_opts);
1097                                 scrub_opts.rtableid = -1;
1098                         }
1099                     scrub_opts_l
1100                         { $$ = scrub_opts; }
1101                 | /* empty */ {
1102                         bzero(&scrub_opts, sizeof scrub_opts);
1103                         scrub_opts.rtableid = -1;
1104                         $$ = scrub_opts;
1105                 }
1106                 ;
1107
1108 scrub_opts_l    : scrub_opts_l scrub_opt
1109                 | scrub_opt
1110                 ;
1111
1112 scrub_opt       : NODF  {
1113                         if (scrub_opts.nodf) {
1114                                 yyerror("no-df cannot be respecified");
1115                                 YYERROR;
1116                         }
1117                         scrub_opts.nodf = 1;
1118                 }
1119                 | MINTTL NUMBER {
1120                         if (scrub_opts.marker & SOM_MINTTL) {
1121                                 yyerror("min-ttl cannot be respecified");
1122                                 YYERROR;
1123                         }
1124                         if ($2 < 0 || $2 > 255) {
1125                                 yyerror("illegal min-ttl value %" PRId64, $2);
1126                                 YYERROR;
1127                         }
1128                         scrub_opts.marker |= SOM_MINTTL;
1129                         scrub_opts.minttl = $2;
1130                 }
1131                 | MAXMSS NUMBER {
1132                         if (scrub_opts.marker & SOM_MAXMSS) {
1133                                 yyerror("max-mss cannot be respecified");
1134                                 YYERROR;
1135                         }
1136                         if ($2 < 0 || $2 > 65535) {
1137                                 yyerror("illegal max-mss value %" PRId64, $2);
1138                                 YYERROR;
1139                         }
1140                         scrub_opts.marker |= SOM_MAXMSS;
1141                         scrub_opts.maxmss = $2;
1142                 }
1143                 | SETTOS tos {
1144                         if (scrub_opts.marker & SOM_SETTOS) {
1145                                 yyerror("set-tos cannot be respecified");
1146                                 YYERROR;
1147                         }
1148                         scrub_opts.marker |= SOM_SETTOS;
1149                         scrub_opts.settos = $2;
1150                 }
1151                 | fragcache {
1152                         if (scrub_opts.marker & SOM_FRAGCACHE) {
1153                                 yyerror("fragcache cannot be respecified");
1154                                 YYERROR;
1155                         }
1156                         scrub_opts.marker |= SOM_FRAGCACHE;
1157                         scrub_opts.fragcache = $1;
1158                 }
1159                 | REASSEMBLE STRING {
1160                         if (strcasecmp($2, "tcp") != 0) {
1161                                 yyerror("scrub reassemble supports only tcp, "
1162                                     "not '%s'", $2);
1163                                 free($2);
1164                                 YYERROR;
1165                         }
1166                         free($2);
1167                         if (scrub_opts.reassemble_tcp) {
1168                                 yyerror("reassemble tcp cannot be respecified");
1169                                 YYERROR;
1170                         }
1171                         scrub_opts.reassemble_tcp = 1;
1172                 }
1173                 | RANDOMID {
1174                         if (scrub_opts.randomid) {
1175                                 yyerror("random-id cannot be respecified");
1176                                 YYERROR;
1177                         }
1178                         scrub_opts.randomid = 1;
1179                 }
1180                 | RTABLE NUMBER                         {
1181                         scrub_opts.rtableid = $2;
1182                 }
1183                 | not TAGGED string                     {
1184                         scrub_opts.match_tag = $3;
1185                         scrub_opts.match_tag_not = $1;
1186                 }
1187                 ;
1188
1189 fragcache       : FRAGMENT REASSEMBLE   { $$ = 0; /* default */ }
1190                 | FRAGMENT FRAGCROP     { $$ = PFRULE_FRAGCROP; }
1191                 | FRAGMENT FRAGDROP     { $$ = PFRULE_FRAGDROP; }
1192                 ;
1193
1194 antispoof       : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1195                         struct pf_rule           r;
1196                         struct node_host        *h = NULL, *hh;
1197                         struct node_if          *i, *j;
1198
1199                         if (check_rulestate(PFCTL_STATE_FILTER))
1200                                 YYERROR;
1201
1202                         for (i = $3; i; i = i->next) {
1203                                 bzero(&r, sizeof(r));
1204
1205                                 r.action = PF_DROP;
1206                                 r.direction = PF_IN;
1207                                 r.log = $2.log;
1208                                 r.logif = $2.logif;
1209                                 r.quick = $2.quick;
1210                                 r.af = $4;
1211                                 if (rule_label(&r, $5.label))
1212                                         YYERROR;
1213                                 r.rtableid = $5.rtableid;
1214                                 j = calloc(1, sizeof(struct node_if));
1215                                 if (j == NULL)
1216                                         err(1, "antispoof: calloc");
1217                                 if (strlcpy(j->ifname, i->ifname,
1218                                     sizeof(j->ifname)) >= sizeof(j->ifname)) {
1219                                         free(j);
1220                                         yyerror("interface name too long");
1221                                         YYERROR;
1222                                 }
1223                                 j->not = 1;
1224                                 if (i->dynamic) {
1225                                         h = calloc(1, sizeof(*h));
1226                                         if (h == NULL)
1227                                                 err(1, "address: calloc");
1228                                         h->addr.type = PF_ADDR_DYNIFTL;
1229                                         set_ipmask(h, 128);
1230                                         if (strlcpy(h->addr.v.ifname, i->ifname,
1231                                             sizeof(h->addr.v.ifname)) >=
1232                                             sizeof(h->addr.v.ifname)) {
1233                                                 free(h);
1234                                                 yyerror(
1235                                                     "interface name too long");
1236                                                 YYERROR;
1237                                         }
1238                                         hh = malloc(sizeof(*hh));
1239                                         if (hh == NULL)
1240                                                  err(1, "address: malloc");
1241                                         bcopy(h, hh, sizeof(*hh));
1242                                         h->addr.iflags = PFI_AFLAG_NETWORK;
1243                                 } else {
1244                                         h = ifa_lookup(j->ifname,
1245                                             PFI_AFLAG_NETWORK);
1246                                         hh = NULL;
1247                                 }
1248
1249                                 if (h != NULL)
1250                                         expand_rule(&r, j, NULL, NULL, NULL, h,
1251                                             NULL, NULL, NULL, NULL, NULL,
1252                                             NULL, "");
1253
1254                                 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1255                                         bzero(&r, sizeof(r));
1256
1257                                         r.action = PF_DROP;
1258                                         r.direction = PF_IN;
1259                                         r.log = $2.log;
1260                                         r.quick = $2.quick;
1261                                         r.af = $4;
1262                                         if (rule_label(&r, $5.label))
1263                                                 YYERROR;
1264                                         r.rtableid = $5.rtableid;
1265                                         if (hh != NULL)
1266                                                 h = hh;
1267                                         else
1268                                                 h = ifa_lookup(i->ifname, 0);
1269                                         if (h != NULL)
1270                                                 expand_rule(&r, NULL, NULL,
1271                                                     NULL, NULL, h, NULL, NULL,
1272                                                     NULL, NULL, NULL, NULL, "");
1273                                 } else
1274                                         free(hh);
1275                         }
1276                         free($5.label);
1277                 }
1278                 ;
1279
1280 antispoof_ifspc : FOR antispoof_if              { $$ = $2; }
1281                 | FOR '{' optnl antispoof_iflst '}'     { $$ = $4; }
1282                 ;
1283
1284 antispoof_iflst : antispoof_if optnl                    { $$ = $1; }
1285                 | antispoof_iflst comma antispoof_if optnl {
1286                         $1->tail->next = $3;
1287                         $1->tail = $3;
1288                         $$ = $1;
1289                 }
1290                 ;
1291
1292 antispoof_if  : if_item                         { $$ = $1; }
1293                 | '(' if_item ')'               {
1294                         $2->dynamic = 1;
1295                         $$ = $2;
1296                 }
1297                 ;
1298
1299 antispoof_opts  :       {
1300                                 bzero(&antispoof_opts, sizeof antispoof_opts);
1301                                 antispoof_opts.rtableid = -1;
1302                         }
1303                     antispoof_opts_l
1304                         { $$ = antispoof_opts; }
1305                 | /* empty */   {
1306                         bzero(&antispoof_opts, sizeof antispoof_opts);
1307                         antispoof_opts.rtableid = -1;
1308                         $$ = antispoof_opts;
1309                 }
1310                 ;
1311
1312 antispoof_opts_l        : antispoof_opts_l antispoof_opt
1313                         | antispoof_opt
1314                         ;
1315
1316 antispoof_opt   : label {
1317                         if (antispoof_opts.label) {
1318                                 yyerror("label cannot be redefined");
1319                                 YYERROR;
1320                         }
1321                         antispoof_opts.label = $1;
1322                 }
1323                 | RTABLE NUMBER                         {
1324                         antispoof_opts.rtableid = $2;
1325                 }
1326                 ;
1327
1328 not             : '!'           { $$ = 1; }
1329                 | /* empty */   { $$ = 0; }
1330                 ;
1331
1332 tabledef        : TABLE '<' STRING '>' table_opts {
1333                         struct node_host         *h, *nh;
1334                         struct node_tinit        *ti, *nti;
1335
1336                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1337                                 yyerror("table name too long, max %d chars",
1338                                     PF_TABLE_NAME_SIZE - 1);
1339                                 free($3);
1340                                 YYERROR;
1341                         }
1342                         if (pf->loadopt & PFCTL_FLAG_TABLE)
1343                                 if (process_tabledef($3, &$5)) {
1344                                         free($3);
1345                                         YYERROR;
1346                                 }
1347                         free($3);
1348                         for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1349                             ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1350                                 if (ti->file)
1351                                         free(ti->file);
1352                                 for (h = ti->host; h != NULL; h = nh) {
1353                                         nh = h->next;
1354                                         free(h);
1355                                 }
1356                                 nti = SIMPLEQ_NEXT(ti, entries);
1357                                 free(ti);
1358                         }
1359                 }
1360                 ;
1361
1362 table_opts      :       {
1363                         bzero(&table_opts, sizeof table_opts);
1364                         SIMPLEQ_INIT(&table_opts.init_nodes);
1365                 }
1366                     table_opts_l
1367                         { $$ = table_opts; }
1368                 | /* empty */
1369                         {
1370                         bzero(&table_opts, sizeof table_opts);
1371                         SIMPLEQ_INIT(&table_opts.init_nodes);
1372                         $$ = table_opts;
1373                 }
1374                 ;
1375
1376 table_opts_l    : table_opts_l table_opt
1377                 | table_opt
1378                 ;
1379
1380 table_opt       : STRING                {
1381                         if (!strcmp($1, "const"))
1382                                 table_opts.flags |= PFR_TFLAG_CONST;
1383                         else if (!strcmp($1, "persist"))
1384                                 table_opts.flags |= PFR_TFLAG_PERSIST;
1385                         else if (!strcmp($1, "counters"))
1386                                 table_opts.flags |= PFR_TFLAG_COUNTERS;
1387                         else {
1388                                 yyerror("invalid table option '%s'", $1);
1389                                 free($1);
1390                                 YYERROR;
1391                         }
1392                         free($1);
1393                 }
1394                 | '{' optnl '}'         { table_opts.init_addr = 1; }
1395                 | '{' optnl host_list '}'       {
1396                         struct node_host        *n;
1397                         struct node_tinit       *ti;
1398
1399                         for (n = $3; n != NULL; n = n->next) {
1400                                 switch (n->addr.type) {
1401                                 case PF_ADDR_ADDRMASK:
1402                                         continue; /* ok */
1403                                 case PF_ADDR_RANGE:
1404                                         yyerror("address ranges are not "
1405                                             "permitted inside tables");
1406                                         break;
1407                                 case PF_ADDR_DYNIFTL:
1408                                         yyerror("dynamic addresses are not "
1409                                             "permitted inside tables");
1410                                         break;
1411                                 case PF_ADDR_TABLE:
1412                                         yyerror("tables cannot contain tables");
1413                                         break;
1414                                 case PF_ADDR_NOROUTE:
1415                                         yyerror("\"no-route\" is not permitted "
1416                                             "inside tables");
1417                                         break;
1418                                 case PF_ADDR_URPFFAILED:
1419                                         yyerror("\"urpf-failed\" is not "
1420                                             "permitted inside tables");
1421                                         break;
1422                                 default:
1423                                         yyerror("unknown address type %d",
1424                                             n->addr.type);
1425                                 }
1426                                 YYERROR;
1427                         }
1428                         if (!(ti = calloc(1, sizeof(*ti))))
1429                                 err(1, "table_opt: calloc");
1430                         ti->host = $3;
1431                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1432                             entries);
1433                         table_opts.init_addr = 1;
1434                 }
1435                 | FILENAME STRING       {
1436                         struct node_tinit       *ti;
1437
1438                         if (!(ti = calloc(1, sizeof(*ti))))
1439                                 err(1, "table_opt: calloc");
1440                         ti->file = $2;
1441                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1442                             entries);
1443                         table_opts.init_addr = 1;
1444                 }
1445                 ;
1446
1447 altqif          : ALTQ interface queue_opts QUEUE qassign {
1448                         struct pf_altq  a;
1449
1450                         if (check_rulestate(PFCTL_STATE_QUEUE))
1451                                 YYERROR;
1452
1453                         memset(&a, 0, sizeof(a));
1454                         if ($3.scheduler.qtype == ALTQT_NONE) {
1455                                 yyerror("no scheduler specified!");
1456                                 YYERROR;
1457                         }
1458                         a.scheduler = $3.scheduler.qtype;
1459                         a.qlimit = $3.qlimit;
1460                         a.tbrsize = $3.tbrsize;
1461                         if ($5 == NULL) {
1462                                 yyerror("no child queues specified");
1463                                 YYERROR;
1464                         }
1465                         if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1466                             &$3.scheduler))
1467                                 YYERROR;
1468                 }
1469                 ;
1470
1471 queuespec       : QUEUE STRING interface queue_opts qassign {
1472                         struct pf_altq  a;
1473
1474                         if (check_rulestate(PFCTL_STATE_QUEUE)) {
1475                                 free($2);
1476                                 YYERROR;
1477                         }
1478
1479                         memset(&a, 0, sizeof(a));
1480
1481                         if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1482                             sizeof(a.qname)) {
1483                                 yyerror("queue name too long (max "
1484                                     "%d chars)", PF_QNAME_SIZE-1);
1485                                 free($2);
1486                                 YYERROR;
1487                         }
1488                         free($2);
1489                         if ($4.tbrsize) {
1490                                 yyerror("cannot specify tbrsize for queue");
1491                                 YYERROR;
1492                         }
1493                         if ($4.priority > 255) {
1494                                 yyerror("priority out of range: max 255");
1495                                 YYERROR;
1496                         }
1497                         a.priority = $4.priority;
1498                         a.qlimit = $4.qlimit;
1499                         a.scheduler = $4.scheduler.qtype;
1500                         if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1501                             &$4.scheduler)) {
1502                                 yyerror("errors in queue definition");
1503                                 YYERROR;
1504                         }
1505                 }
1506                 ;
1507
1508 queue_opts      :       {
1509                         bzero(&queue_opts, sizeof queue_opts);
1510                         queue_opts.priority = DEFAULT_PRIORITY;
1511                         queue_opts.qlimit = DEFAULT_QLIMIT;
1512                         queue_opts.scheduler.qtype = ALTQT_NONE;
1513                         queue_opts.queue_bwspec.bw_percent = 100;
1514                 }
1515                     queue_opts_l
1516                         { $$ = queue_opts; }
1517                 | /* empty */ {
1518                         bzero(&queue_opts, sizeof queue_opts);
1519                         queue_opts.priority = DEFAULT_PRIORITY;
1520                         queue_opts.qlimit = DEFAULT_QLIMIT;
1521                         queue_opts.scheduler.qtype = ALTQT_NONE;
1522                         queue_opts.queue_bwspec.bw_percent = 100;
1523                         $$ = queue_opts;
1524                 }
1525                 ;
1526
1527 queue_opts_l    : queue_opts_l queue_opt
1528                 | queue_opt
1529                 ;
1530
1531 queue_opt       : BANDWIDTH bandwidth   {
1532                         if (queue_opts.marker & QOM_BWSPEC) {
1533                                 yyerror("bandwidth cannot be respecified");
1534                                 YYERROR;
1535                         }
1536                         queue_opts.marker |= QOM_BWSPEC;
1537                         queue_opts.queue_bwspec = $2;
1538                 }
1539                 | PRIORITY NUMBER       {
1540                         if (queue_opts.marker & QOM_PRIORITY) {
1541                                 yyerror("priority cannot be respecified");
1542                                 YYERROR;
1543                         }
1544                         if ($2 < 0 || $2 > 255) {
1545                                 yyerror("priority out of range: max 255");
1546                                 YYERROR;
1547                         }
1548                         queue_opts.marker |= QOM_PRIORITY;
1549                         queue_opts.priority = $2;
1550                 }
1551                 | QLIMIT NUMBER {
1552                         if (queue_opts.marker & QOM_QLIMIT) {
1553                                 yyerror("qlimit cannot be respecified");
1554                                 YYERROR;
1555                         }
1556                         if ($2 < 0 || $2 > 65535) {
1557                                 yyerror("qlimit out of range: max 65535");
1558                                 YYERROR;
1559                         }
1560                         queue_opts.marker |= QOM_QLIMIT;
1561                         queue_opts.qlimit = $2;
1562                 }
1563                 | scheduler     {
1564                         if (queue_opts.marker & QOM_SCHEDULER) {
1565                                 yyerror("scheduler cannot be respecified");
1566                                 YYERROR;
1567                         }
1568                         queue_opts.marker |= QOM_SCHEDULER;
1569                         queue_opts.scheduler = $1;
1570                 }
1571                 | TBRSIZE NUMBER        {
1572                         if (queue_opts.marker & QOM_TBRSIZE) {
1573                                 yyerror("tbrsize cannot be respecified");
1574                                 YYERROR;
1575                         }
1576                         if ($2 < 0 || $2 > 65535) {
1577                                 yyerror("tbrsize too big: max 65535");
1578                                 YYERROR;
1579                         }
1580                         queue_opts.marker |= QOM_TBRSIZE;
1581                         queue_opts.tbrsize = $2;
1582                 }
1583                 ;
1584
1585 bandwidth       : STRING {
1586                         double   bps;
1587                         char    *cp;
1588
1589                         $$.bw_percent = 0;
1590
1591                         bps = strtod($1, &cp);
1592                         if (cp != NULL) {
1593                                 if (!strcmp(cp, "b"))
1594                                         ; /* nothing */
1595                                 else if (!strcmp(cp, "Kb"))
1596                                         bps *= 1000;
1597                                 else if (!strcmp(cp, "Mb"))
1598                                         bps *= 1000 * 1000;
1599                                 else if (!strcmp(cp, "Gb"))
1600                                         bps *= 1000 * 1000 * 1000;
1601                                 else if (!strcmp(cp, "%")) {
1602                                         if (bps < 0 || bps > 100) {
1603                                                 yyerror("bandwidth spec "
1604                                                     "out of range");
1605                                                 free($1);
1606                                                 YYERROR;
1607                                         }
1608                                         $$.bw_percent = bps;
1609                                         bps = 0;
1610                                 } else {
1611                                         yyerror("unknown unit %s", cp);
1612                                         free($1);
1613                                         YYERROR;
1614                                 }
1615                         }
1616                         free($1);
1617                         $$.bw_absolute = (u_int32_t)bps;
1618                 }
1619                 | NUMBER {
1620                         if ($1 < 0 || $1 > UINT_MAX) {
1621                                 yyerror("bandwidth number too big");
1622                                 YYERROR;
1623                         }
1624                         $$.bw_percent = 0;
1625                         $$.bw_absolute = $1;
1626                 }
1627                 ;
1628
1629 scheduler       : CBQ                           {
1630                         $$.qtype = ALTQT_CBQ;
1631                         $$.data.cbq_opts.flags = 0;
1632                 }
1633                 | CBQ '(' cbqflags_list ')'     {
1634                         $$.qtype = ALTQT_CBQ;
1635                         $$.data.cbq_opts.flags = $3;
1636                 }
1637                 | PRIQ                          {
1638                         $$.qtype = ALTQT_PRIQ;
1639                         $$.data.priq_opts.flags = 0;
1640                 }
1641                 | PRIQ '(' priqflags_list ')'   {
1642                         $$.qtype = ALTQT_PRIQ;
1643                         $$.data.priq_opts.flags = $3;
1644                 }
1645                 | HFSC                          {
1646                         $$.qtype = ALTQT_HFSC;
1647                         bzero(&$$.data.hfsc_opts,
1648                             sizeof(struct node_hfsc_opts));
1649                 }
1650                 | HFSC '(' hfsc_opts ')'        {
1651                         $$.qtype = ALTQT_HFSC;
1652                         $$.data.hfsc_opts = $3;
1653                 }
1654                 | FAIRQ                         {
1655                         $$.qtype = ALTQT_FAIRQ;
1656                         bzero(&$$.data.fairq_opts,
1657                             sizeof(struct node_fairq_opts));
1658                 }
1659                 | FAIRQ '(' fairq_opts ')'      {
1660                         $$.qtype = ALTQT_FAIRQ;
1661                         $$.data.fairq_opts = $3;
1662                 }
1663                 ;
1664
1665 cbqflags_list   : cbqflags_item                         { $$ |= $1; }
1666                 | cbqflags_list comma cbqflags_item     { $$ |= $3; }
1667                 ;
1668
1669 cbqflags_item   : STRING        {
1670                         if (!strcmp($1, "default"))
1671                                 $$ = CBQCLF_DEFCLASS;
1672                         else if (!strcmp($1, "borrow"))
1673                                 $$ = CBQCLF_BORROW;
1674                         else if (!strcmp($1, "red"))
1675                                 $$ = CBQCLF_RED;
1676                         else if (!strcmp($1, "ecn"))
1677                                 $$ = CBQCLF_RED|CBQCLF_ECN;
1678                         else if (!strcmp($1, "rio"))
1679                                 $$ = CBQCLF_RIO;
1680                         else {
1681                                 yyerror("unknown cbq flag \"%s\"", $1);
1682                                 free($1);
1683                                 YYERROR;
1684                         }
1685                         free($1);
1686                 }
1687                 ;
1688
1689 priqflags_list  : priqflags_item                        { $$ |= $1; }
1690                 | priqflags_list comma priqflags_item   { $$ |= $3; }
1691                 ;
1692
1693 priqflags_item  : STRING        {
1694                         if (!strcmp($1, "default"))
1695                                 $$ = PRCF_DEFAULTCLASS;
1696                         else if (!strcmp($1, "red"))
1697                                 $$ = PRCF_RED;
1698                         else if (!strcmp($1, "ecn"))
1699                                 $$ = PRCF_RED|PRCF_ECN;
1700                         else if (!strcmp($1, "rio"))
1701                                 $$ = PRCF_RIO;
1702                         else {
1703                                 yyerror("unknown priq flag \"%s\"", $1);
1704                                 free($1);
1705                                 YYERROR;
1706                         }
1707                         free($1);
1708                 }
1709                 ;
1710
1711 hfsc_opts       :       {
1712                                 bzero(&hfsc_opts,
1713                                     sizeof(struct node_hfsc_opts));
1714                         }
1715                     hfscopts_list                               {
1716                         $$ = hfsc_opts;
1717                 }
1718                 ;
1719
1720 hfscopts_list   : hfscopts_item
1721                 | hfscopts_list comma hfscopts_item
1722                 ;
1723
1724 hfscopts_item   : LINKSHARE bandwidth                           {
1725                         if (hfsc_opts.linkshare.used) {
1726                                 yyerror("linkshare already specified");
1727                                 YYERROR;
1728                         }
1729                         hfsc_opts.linkshare.m2 = $2;
1730                         hfsc_opts.linkshare.used = 1;
1731                 }
1732                 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1733                     {
1734                         if ($5 < 0 || $5 > INT_MAX) {
1735                                 yyerror("timing in curve out of range");
1736                                 YYERROR;
1737                         }
1738                         if (hfsc_opts.linkshare.used) {
1739                                 yyerror("linkshare already specified");
1740                                 YYERROR;
1741                         }
1742                         hfsc_opts.linkshare.m1 = $3;
1743                         hfsc_opts.linkshare.d = $5;
1744                         hfsc_opts.linkshare.m2 = $7;
1745                         hfsc_opts.linkshare.used = 1;
1746                 }
1747                 | REALTIME bandwidth                            {
1748                         if (hfsc_opts.realtime.used) {
1749                                 yyerror("realtime already specified");
1750                                 YYERROR;
1751                         }
1752                         hfsc_opts.realtime.m2 = $2;
1753                         hfsc_opts.realtime.used = 1;
1754                 }
1755                 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1756                     {
1757                         if ($5 < 0 || $5 > INT_MAX) {
1758                                 yyerror("timing in curve out of range");
1759                                 YYERROR;
1760                         }
1761                         if (hfsc_opts.realtime.used) {
1762                                 yyerror("realtime already specified");
1763                                 YYERROR;
1764                         }
1765                         hfsc_opts.realtime.m1 = $3;
1766                         hfsc_opts.realtime.d = $5;
1767                         hfsc_opts.realtime.m2 = $7;
1768                         hfsc_opts.realtime.used = 1;
1769                 }
1770                 | UPPERLIMIT bandwidth                          {
1771                         if (hfsc_opts.upperlimit.used) {
1772                                 yyerror("upperlimit already specified");
1773                                 YYERROR;
1774                         }
1775                         hfsc_opts.upperlimit.m2 = $2;
1776                         hfsc_opts.upperlimit.used = 1;
1777                 }
1778                 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1779                     {
1780                         if ($5 < 0 || $5 > INT_MAX) {
1781                                 yyerror("timing in curve out of range");
1782                                 YYERROR;
1783                         }
1784                         if (hfsc_opts.upperlimit.used) {
1785                                 yyerror("upperlimit already specified");
1786                                 YYERROR;
1787                         }
1788                         hfsc_opts.upperlimit.m1 = $3;
1789                         hfsc_opts.upperlimit.d = $5;
1790                         hfsc_opts.upperlimit.m2 = $7;
1791                         hfsc_opts.upperlimit.used = 1;
1792                 }
1793                 | STRING        {
1794                         if (!strcmp($1, "default"))
1795                                 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1796                         else if (!strcmp($1, "red"))
1797                                 hfsc_opts.flags |= HFCF_RED;
1798                         else if (!strcmp($1, "ecn"))
1799                                 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1800                         else if (!strcmp($1, "rio"))
1801                                 hfsc_opts.flags |= HFCF_RIO;
1802                         else {
1803                                 yyerror("unknown hfsc flag \"%s\"", $1);
1804                                 free($1);
1805                                 YYERROR;
1806                         }
1807                         free($1);
1808                 }
1809                 ;
1810
1811 fairq_opts      :       {
1812                                 bzero(&fairq_opts,
1813                                     sizeof(struct node_fairq_opts));
1814                         }
1815                     fairqopts_list                              {
1816                         $$ = fairq_opts;
1817                 }
1818                 ;
1819
1820 fairqopts_list  : fairqopts_item
1821                 | fairqopts_list comma fairqopts_item
1822                 ;
1823
1824 fairqopts_item  : LINKSHARE bandwidth                           {
1825                         if (fairq_opts.linkshare.used) {
1826                                 yyerror("linkshare already specified");
1827                                 YYERROR;
1828                         }
1829                         fairq_opts.linkshare.m2 = $2;
1830                         fairq_opts.linkshare.used = 1;
1831                 }
1832                 | LINKSHARE '(' bandwidth number bandwidth ')'  {
1833                         if (fairq_opts.linkshare.used) {
1834                                 yyerror("linkshare already specified");
1835                                 YYERROR;
1836                         }
1837                         fairq_opts.linkshare.m1 = $3;
1838                         fairq_opts.linkshare.d = $4;
1839                         fairq_opts.linkshare.m2 = $5;
1840                         fairq_opts.linkshare.used = 1;
1841                 }
1842                 | HOGS bandwidth {
1843                         fairq_opts.hogs_bw = $2;
1844                 }
1845                 | BUCKETS number {
1846                         fairq_opts.nbuckets = $2;
1847                 }
1848                 | STRING        {
1849                         if (!strcmp($1, "default"))
1850                                 fairq_opts.flags |= FARF_DEFAULTCLASS;
1851                         else if (!strcmp($1, "red"))
1852                                 fairq_opts.flags |= FARF_RED;
1853                         else if (!strcmp($1, "ecn"))
1854                                 fairq_opts.flags |= FARF_RED|FARF_ECN;
1855                         else if (!strcmp($1, "rio"))
1856                                 fairq_opts.flags |= FARF_RIO;
1857                         else {
1858                                 yyerror("unknown fairq flag \"%s\"", $1);
1859                                 free($1);
1860                                 YYERROR;
1861                         }
1862                         free($1);
1863                 }
1864                 ;
1865
1866 qassign         : /* empty */           { $$ = NULL; }
1867                 | qassign_item          { $$ = $1; }
1868                 | '{' optnl qassign_list '}'    { $$ = $3; }
1869                 ;
1870
1871 qassign_list    : qassign_item optnl            { $$ = $1; }
1872                 | qassign_list comma qassign_item optnl {
1873                         $1->tail->next = $3;
1874                         $1->tail = $3;
1875                         $$ = $1;
1876                 }
1877                 ;
1878
1879 qassign_item    : STRING                        {
1880                         $$ = calloc(1, sizeof(struct node_queue));
1881                         if ($$ == NULL)
1882                                 err(1, "qassign_item: calloc");
1883                         if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
1884                             sizeof($$->queue)) {
1885                                 yyerror("queue name '%s' too long (max "
1886                                     "%zd chars)", $1, sizeof($$->queue)-1);
1887                                 free($1);
1888                                 free($$);
1889                                 YYERROR;
1890                         }
1891                         free($1);
1892                         $$->next = NULL;
1893                         $$->tail = $$;
1894                 }
1895                 ;
1896
1897 pfrule          : action dir logquick interface route af proto fromto
1898                     filter_opts
1899                 {
1900                         struct pf_rule           r;
1901                         struct node_state_opt   *o;
1902                         struct node_proto       *proto;
1903                         int                      srctrack = 0;
1904                         int                      statelock = 0;
1905                         int                      adaptive = 0;
1906                         int                      dofree;
1907
1908                         if (check_rulestate(PFCTL_STATE_FILTER))
1909                                 YYERROR;
1910
1911                         memset(&r, 0, sizeof(r));
1912
1913                         r.action = $1.b1;
1914                         switch ($1.b2) {
1915                         case PFRULE_RETURNRST:
1916                                 r.rule_flag |= PFRULE_RETURNRST;
1917                                 r.return_ttl = $1.w;
1918                                 break;
1919                         case PFRULE_RETURNICMP:
1920                                 r.rule_flag |= PFRULE_RETURNICMP;
1921                                 r.return_icmp = $1.w;
1922                                 r.return_icmp6 = $1.w2;
1923                                 break;
1924                         case PFRULE_RETURN:
1925                                 r.rule_flag |= PFRULE_RETURN;
1926                                 r.return_icmp = $1.w;
1927                                 r.return_icmp6 = $1.w2;
1928                                 break;
1929                         }
1930                         r.direction = $2;
1931                         r.log = $3.log;
1932                         r.logif = $3.logif;
1933                         r.quick = $3.quick;
1934                         r.prob = $9.prob;
1935                         r.rtableid = $9.rtableid;
1936
1937                         r.af = $6;
1938                         if ($9.tag)
1939                                 if (strlcpy(r.tagname, $9.tag,
1940                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1941                                         yyerror("tag too long, max %u chars",
1942                                             PF_TAG_NAME_SIZE - 1);
1943                                         YYERROR;
1944                                 }
1945                         if ($9.match_tag)
1946                                 if (strlcpy(r.match_tagname, $9.match_tag,
1947                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1948                                         yyerror("tag too long, max %u chars",
1949                                             PF_TAG_NAME_SIZE - 1);
1950                                         YYERROR;
1951                                 }
1952                         r.match_tag_not = $9.match_tag_not;
1953                         if (rule_label(&r, $9.label))
1954                                 YYERROR;
1955                         free($9.label);
1956                         r.flags = $9.flags.b1;
1957                         r.flagset = $9.flags.b2;
1958                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
1959                                 yyerror("flags always false");
1960                                 YYERROR;
1961                         }
1962                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
1963                                 for (proto = $7; proto != NULL &&
1964                                     proto->proto != IPPROTO_TCP;
1965                                     proto = proto->next)
1966                                         ;       /* nothing */
1967                                 if (proto == NULL && $7 != NULL) {
1968                                         if ($9.flags.b1 || $9.flags.b2)
1969                                                 yyerror(
1970                                                     "flags only apply to tcp");
1971                                         if ($8.src_os)
1972                                                 yyerror(
1973                                                     "OS fingerprinting only "
1974                                                     "apply to tcp");
1975                                         YYERROR;
1976                                 }
1977 #if 0
1978                                 if (($9.flags.b1 & parse_flags("S")) == 0 &&
1979                                     $8.src_os) {
1980                                         yyerror("OS fingerprinting requires "
1981                                             "the SYN TCP flag (flags S/SA)");
1982                                         YYERROR;
1983                                 }
1984 #endif
1985                         }
1986
1987                         r.tos = $9.tos;
1988
1989                         if (filter_opts.marker & FOM_KEEP) {
1990                                 r.keep_state = $9.keep.action;
1991                                 o = $9.keep.options;
1992                                 dofree = 1;
1993                         } else if (r.action == PF_PASS) {
1994                                 r.keep_state = default_keeppolicy_action;
1995                                 o = default_keeppolicy_options;
1996                                 dofree = 0;
1997                         } else {
1998                                 o = NULL;
1999                                 dofree = 0;
2000                         }
2001                         while (o) {
2002                                 struct node_state_opt   *p = o;
2003
2004                                 switch (o->type) {
2005                                 case PF_STATE_OPT_MAX:
2006                                         if (r.max_states) {
2007                                                 yyerror("state option 'max' "
2008                                                     "multiple definitions");
2009                                                 YYERROR;
2010                                         }
2011                                         r.max_states = o->data.max_states;
2012                                         break;
2013                                 case PF_STATE_OPT_NOSYNC:
2014                                         if (r.rule_flag & PFRULE_NOSYNC) {
2015                                                 yyerror("state option 'sync' "
2016                                                     "multiple definitions");
2017                                                 YYERROR;
2018                                         }
2019                                         r.rule_flag |= PFRULE_NOSYNC;
2020                                         break;
2021                                 case PF_STATE_OPT_SRCTRACK:
2022                                         if (srctrack) {
2023                                                 yyerror("state option "
2024                                                     "'source-track' "
2025                                                     "multiple definitions");
2026                                                 YYERROR;
2027                                         }
2028                                         srctrack =  o->data.src_track;
2029                                         r.rule_flag |= PFRULE_SRCTRACK;
2030                                         break;
2031                                 case PF_STATE_OPT_MAX_SRC_STATES:
2032                                         if (r.max_src_states) {
2033                                                 yyerror("state option "
2034                                                     "'max-src-states' "
2035                                                     "multiple definitions");
2036                                                 YYERROR;
2037                                         }
2038                                         if (o->data.max_src_states == 0) {
2039                                                 yyerror("'max-src-states' must "
2040                                                     "be > 0");
2041                                                 YYERROR;
2042                                         }
2043                                         r.max_src_states =
2044                                             o->data.max_src_states;
2045                                         r.rule_flag |= PFRULE_SRCTRACK;
2046                                         break;
2047                                 case PF_STATE_OPT_OVERLOAD:
2048                                         if (r.overload_tblname[0]) {
2049                                                 yyerror("multiple 'overload' "
2050                                                     "table definitions");
2051                                                 YYERROR;
2052                                         }
2053                                         if (strlcpy(r.overload_tblname,
2054                                             o->data.overload.tblname,
2055                                             PF_TABLE_NAME_SIZE) >=
2056                                             PF_TABLE_NAME_SIZE) {
2057                                                 yyerror("state option: "
2058                                                     "strlcpy");
2059                                                 YYERROR;
2060                                         }
2061                                         r.flush = o->data.overload.flush;
2062                                         break;
2063                                 case PF_STATE_OPT_MAX_SRC_CONN:
2064                                         if (r.max_src_conn) {
2065                                                 yyerror("state option "
2066                                                     "'max-src-conn' "
2067                                                     "multiple definitions");
2068                                                 YYERROR;
2069                                         }
2070                                         if (o->data.max_src_conn == 0) {
2071                                                 yyerror("'max-src-conn' "
2072                                                     "must be > 0");
2073                                                 YYERROR;
2074                                         }
2075                                         r.max_src_conn =
2076                                             o->data.max_src_conn;
2077                                         r.rule_flag |= PFRULE_SRCTRACK |
2078                                             PFRULE_RULESRCTRACK;
2079                                         break;
2080                                 case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2081                                         if (r.max_src_conn_rate.limit) {
2082                                                 yyerror("state option "
2083                                                     "'max-src-conn-rate' "
2084                                                     "multiple definitions");
2085                                                 YYERROR;
2086                                         }
2087                                         if (!o->data.max_src_conn_rate.limit ||
2088                                             !o->data.max_src_conn_rate.seconds) {
2089                                                 yyerror("'max-src-conn-rate' "
2090                                                     "values must be > 0");
2091                                                 YYERROR;
2092                                         }
2093                                         if (o->data.max_src_conn_rate.limit >
2094                                             PF_THRESHOLD_MAX) {
2095                                                 yyerror("'max-src-conn-rate' "
2096                                                     "maximum rate must be < %u",
2097                                                     PF_THRESHOLD_MAX);
2098                                                 YYERROR;
2099                                         }
2100                                         r.max_src_conn_rate.limit =
2101                                             o->data.max_src_conn_rate.limit;
2102                                         r.max_src_conn_rate.seconds =
2103                                             o->data.max_src_conn_rate.seconds;
2104                                         r.rule_flag |= PFRULE_SRCTRACK |
2105                                             PFRULE_RULESRCTRACK;
2106                                         break;
2107                                 case PF_STATE_OPT_MAX_SRC_NODES:
2108                                         if (r.max_src_nodes) {
2109                                                 yyerror("state option "
2110                                                     "'max-src-nodes' "
2111                                                     "multiple definitions");
2112                                                 YYERROR;
2113                                         }
2114                                         if (o->data.max_src_nodes == 0) {
2115                                                 yyerror("'max-src-nodes' must "
2116                                                     "be > 0");
2117                                                 YYERROR;
2118                                         }
2119                                         r.max_src_nodes =
2120                                             o->data.max_src_nodes;
2121                                         r.rule_flag |= PFRULE_SRCTRACK |
2122                                             PFRULE_RULESRCTRACK;
2123                                         break;
2124                                 case PF_STATE_OPT_STATELOCK:
2125                                         if (statelock) {
2126                                                 yyerror("state locking option: "
2127                                                     "multiple definitions");
2128                                                 YYERROR;
2129                                         }
2130                                         statelock = 1;
2131                                         r.rule_flag |= o->data.statelock;
2132                                         break;
2133                                 case PF_STATE_OPT_SLOPPY:
2134                                         if (r.rule_flag & PFRULE_STATESLOPPY) {
2135                                                 yyerror("state sloppy option: "
2136                                                     "multiple definitions");
2137                                                 YYERROR;
2138                                         }
2139                                         r.rule_flag |= PFRULE_STATESLOPPY;
2140                                         break;
2141                                 case PF_STATE_OPT_TIMEOUT:
2142                                         if (o->data.timeout.number ==
2143                                             PFTM_ADAPTIVE_START ||
2144                                             o->data.timeout.number ==
2145                                             PFTM_ADAPTIVE_END)
2146                                                 adaptive = 1;
2147                                         if (r.timeout[o->data.timeout.number]) {
2148                                                 yyerror("state timeout %s "
2149                                                     "multiple definitions",
2150                                                     pf_timeouts[o->data.
2151                                                     timeout.number].name);
2152                                                 YYERROR;
2153                                         }
2154                                         r.timeout[o->data.timeout.number] =
2155                                             o->data.timeout.seconds;
2156                                         break;
2157                                 case PF_STATE_OPT_PICKUPS:
2158                                         r.pickup_mode = o->data.pickup_mode;
2159                                         break;
2160                                 }
2161                                 o = o->next;
2162                                 if (dofree)
2163                                         free(p);
2164                         }
2165
2166 #if 0
2167                         /* 'flags S/SA' by default on stateful rules */
2168                         if (!r.action && !r.flags && !r.flagset &&
2169                             !$9.fragment && !($9.marker & FOM_FLAGS) &&
2170                             r.keep_state) {
2171                                 r.flags = parse_flags("S");
2172                                 r.flagset =  parse_flags("SA");
2173                         }
2174 #endif
2175                         if (!adaptive && r.max_states) {
2176                                 r.timeout[PFTM_ADAPTIVE_START] =
2177                                     (r.max_states / 10) * 6;
2178                                 r.timeout[PFTM_ADAPTIVE_END] =
2179                                     (r.max_states / 10) * 12;
2180                         }
2181                         if (r.rule_flag & PFRULE_SRCTRACK) {
2182                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2183                                     r.max_src_nodes) {
2184                                         yyerror("'max-src-nodes' is "
2185                                             "incompatible with "
2186                                             "'source-track global'");
2187                                         YYERROR;
2188                                 }
2189                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2190                                     r.max_src_conn) {
2191                                         yyerror("'max-src-conn' is "
2192                                             "incompatible with "
2193                                             "'source-track global'");
2194                                         YYERROR;
2195                                 }
2196                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2197                                     r.max_src_conn_rate.seconds) {
2198                                         yyerror("'max-src-conn-rate' is "
2199                                             "incompatible with "
2200                                             "'source-track global'");
2201                                         YYERROR;
2202                                 }
2203                                 if (r.timeout[PFTM_SRC_NODE] <
2204                                     r.max_src_conn_rate.seconds)
2205                                         r.timeout[PFTM_SRC_NODE] =
2206                                             r.max_src_conn_rate.seconds;
2207                                 r.rule_flag |= PFRULE_SRCTRACK;
2208                                 if (srctrack == PF_SRCTRACK_RULE)
2209                                         r.rule_flag |= PFRULE_RULESRCTRACK;
2210                         }
2211                         if (r.keep_state && !statelock)
2212                                 r.rule_flag |= default_statelock;
2213
2214                         if ($9.fragment)
2215                                 r.rule_flag |= PFRULE_FRAGMENT;
2216                         r.allow_opts = $9.allowopts;
2217
2218                         decide_address_family($8.src.host, &r.af);
2219                         decide_address_family($8.dst.host, &r.af);
2220
2221                         if ($5.rt) {
2222                                 if (!r.direction) {
2223                                         yyerror("direction must be explicit "
2224                                             "with rules that specify routing");
2225                                         YYERROR;
2226                                 }
2227                                 r.rt = $5.rt;
2228                                 r.rpool.opts = $5.pool_opts;
2229                                 if ($5.key != NULL)
2230                                         memcpy(&r.rpool.key, $5.key,
2231                                             sizeof(struct pf_poolhashkey));
2232                         }
2233                         if (r.rt && r.rt != PF_FASTROUTE) {
2234                                 decide_address_family($5.host, &r.af);
2235                                 remove_invalid_hosts(&$5.host, &r.af);
2236                                 if ($5.host == NULL) {
2237                                         yyerror("no routing address with "
2238                                             "matching address family found.");
2239                                         YYERROR;
2240                                 }
2241                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2242                                     PF_POOL_NONE && ($5.host->next != NULL ||
2243                                     $5.host->addr.type == PF_ADDR_TABLE ||
2244                                     DYNIF_MULTIADDR($5.host->addr)))
2245                                         r.rpool.opts |= PF_POOL_ROUNDROBIN;
2246                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2247                                     PF_POOL_ROUNDROBIN &&
2248                                     disallow_table($5.host, "tables are only "
2249                                     "supported in round-robin routing pools"))
2250                                         YYERROR;
2251                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2252                                     PF_POOL_ROUNDROBIN &&
2253                                     disallow_alias($5.host, "interface (%s) "
2254                                     "is only supported in round-robin "
2255                                     "routing pools"))
2256                                         YYERROR;
2257                                 if ($5.host->next != NULL) {
2258                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2259                                             PF_POOL_ROUNDROBIN) {
2260                                                 yyerror("r.rpool.opts must "
2261                                                     "be PF_POOL_ROUNDROBIN");
2262                                                 YYERROR;
2263                                         }
2264                                 }
2265                         }
2266                         if ($9.queues.qname != NULL) {
2267                                 if (strlcpy(r.qname, $9.queues.qname,
2268                                     sizeof(r.qname)) >= sizeof(r.qname)) {
2269                                         yyerror("rule qname too long (max "
2270                                             "%zd chars)", sizeof(r.qname)-1);
2271                                         YYERROR;
2272                                 }
2273                                 free($9.queues.qname);
2274                         }
2275                         if ($9.queues.pqname != NULL) {
2276                                 if (strlcpy(r.pqname, $9.queues.pqname,
2277                                     sizeof(r.pqname)) >= sizeof(r.pqname)) {
2278                                         yyerror("rule pqname too long (max "
2279                                             "%zd chars)", sizeof(r.pqname)-1);
2280                                         YYERROR;
2281                                 }
2282                                 free($9.queues.pqname);
2283                         }
2284                         if ((r.divert.port = $9.divert.port)) {
2285                                 if (r.direction == PF_OUT) {
2286                                         if ($9.divert.addr) {
2287                                                 yyerror("address specified "
2288                                                     "for outgoing divert");
2289                                                 YYERROR;
2290                                         }
2291                                         bzero(&r.divert.addr,
2292                                             sizeof(r.divert.addr));
2293                                 } else {
2294                                         if (!$9.divert.addr) {
2295                                                 yyerror("no address specified "
2296                                                     "for incoming divert");
2297                                                 YYERROR;
2298                                         }
2299                                         if ($9.divert.addr->af != r.af) {
2300                                                 yyerror("address family "
2301                                                     "mismatch for divert");
2302                                                 YYERROR;
2303                                         }
2304                                         r.divert.addr =
2305                                             $9.divert.addr->addr.v.a.addr;
2306                                 }
2307                         }
2308
2309                         expand_rule(&r, $4, $5.host, $7, $8.src_os,
2310                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
2311                             $9.uid, $9.gid, $9.icmpspec, "");
2312                 }
2313                 ;
2314
2315 filter_opts     :       {
2316                                 bzero(&filter_opts, sizeof filter_opts);
2317                                 filter_opts.rtableid = -1;
2318                         }
2319                     filter_opts_l
2320                         { $$ = filter_opts; }
2321                 | /* empty */   {
2322                         bzero(&filter_opts, sizeof filter_opts);
2323                         filter_opts.rtableid = -1;
2324                         $$ = filter_opts;
2325                 }
2326                 ;
2327
2328 filter_opts_l   : filter_opts_l filter_opt
2329                 | filter_opt
2330                 ;
2331
2332 filter_opt      : USER uids {
2333                         if (filter_opts.uid)
2334                                 $2->tail->next = filter_opts.uid;
2335                         filter_opts.uid = $2;
2336                 }
2337                 | GROUP gids {
2338                         if (filter_opts.gid)
2339                                 $2->tail->next = filter_opts.gid;
2340                         filter_opts.gid = $2;
2341                 }
2342                 | flags {
2343                         if (filter_opts.marker & FOM_FLAGS) {
2344                                 yyerror("flags cannot be redefined");
2345                                 YYERROR;
2346                         }
2347                         filter_opts.marker |= FOM_FLAGS;
2348                         filter_opts.flags.b1 |= $1.b1;
2349                         filter_opts.flags.b2 |= $1.b2;
2350                         filter_opts.flags.w |= $1.w;
2351                         filter_opts.flags.w2 |= $1.w2;
2352                 }
2353                 | icmpspec {
2354                         if (filter_opts.marker & FOM_ICMP) {
2355                                 yyerror("icmp-type cannot be redefined");
2356                                 YYERROR;
2357                         }
2358                         filter_opts.marker |= FOM_ICMP;
2359                         filter_opts.icmpspec = $1;
2360                 }
2361                 | TOS tos {
2362                         if (filter_opts.marker & FOM_TOS) {
2363                                 yyerror("tos cannot be redefined");
2364                                 YYERROR;
2365                         }
2366                         filter_opts.marker |= FOM_TOS;
2367                         filter_opts.tos = $2;
2368                 }
2369                 | keep {
2370                         if (filter_opts.marker & FOM_KEEP) {
2371                                 yyerror("modulate or keep cannot be redefined");
2372                                 YYERROR;
2373                         }
2374                         filter_opts.marker |= FOM_KEEP;
2375                         filter_opts.keep.action = $1.action;
2376                         filter_opts.keep.options = $1.options;
2377                 }
2378                 | FRAGMENT {
2379                         filter_opts.fragment = 1;
2380                 }
2381                 | ALLOWOPTS {
2382                         filter_opts.allowopts = 1;
2383                 }
2384                 | label {
2385                         if (filter_opts.label) {
2386                                 yyerror("label cannot be redefined");
2387                                 YYERROR;
2388                         }
2389                         filter_opts.label = $1;
2390                 }
2391                 | qname {
2392                         if (filter_opts.queues.qname) {
2393                                 yyerror("queue cannot be redefined");
2394                                 YYERROR;
2395                         }
2396                         filter_opts.queues = $1;
2397                 }
2398                 | TAG string                            {
2399                         filter_opts.tag = $2;
2400                 }
2401                 | not TAGGED string                     {
2402                         filter_opts.match_tag = $3;
2403                         filter_opts.match_tag_not = $1;
2404                 }
2405                 | PROBABILITY probability               {
2406                         double  p;
2407
2408                         p = floor($2 * UINT_MAX + 0.5);
2409                         if (p < 0.0 || p > UINT_MAX) {
2410                                 yyerror("invalid probability: %lf", p);
2411                                 YYERROR;
2412                         }
2413                         filter_opts.prob = (u_int32_t)p;
2414                         if (filter_opts.prob == 0)
2415                                 filter_opts.prob = 1;
2416                 }
2417                 | RTABLE NUMBER                         {
2418                         filter_opts.rtableid = $2;
2419                 }
2420                 | DIVERTTO STRING PORT portplain {
2421                         if ((filter_opts.divert.addr = host($2)) == NULL) {
2422                                 yyerror("could not parse divert address: %s",
2423                                     $2);
2424                                 free($2);
2425                                 YYERROR;
2426                         }
2427                         free($2);
2428                         filter_opts.divert.port = $4.a;
2429                         if (!filter_opts.divert.port) {
2430                                 yyerror("invalid divert port: %u", ntohs($4.a));
2431                                 YYERROR;
2432                         }
2433                 }
2434                 | DIVERTREPLY {
2435                         filter_opts.divert.port = 1;    /* some random value */
2436                 }
2437                 ;
2438
2439 probability     : STRING                                {
2440                         char    *e;
2441                         double   p = strtod($1, &e);
2442
2443                         if (*e == '%') {
2444                                 p *= 0.01;
2445                                 e++;
2446                         }
2447                         if (*e) {
2448                                 yyerror("invalid probability: %s", $1);
2449                                 free($1);
2450                                 YYERROR;
2451                         }
2452                         free($1);
2453                         $$ = p;
2454                 }
2455                 | NUMBER                                {
2456                         $$ = (double)$1;
2457                 }
2458                 ;
2459
2460
2461 action          : PASS                  { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
2462                 | BLOCK blockspec       { $$ = $2; $$.b1 = PF_DROP; }
2463                 ;
2464
2465 blockspec       : /* empty */           {
2466                         $$.b2 = blockpolicy;
2467                         $$.w = returnicmpdefault;
2468                         $$.w2 = returnicmp6default;
2469                 }
2470                 | DROP                  {
2471                         $$.b2 = PFRULE_DROP;
2472                         $$.w = 0;
2473                         $$.w2 = 0;
2474                 }
2475                 | RETURNRST             {
2476                         $$.b2 = PFRULE_RETURNRST;
2477                         $$.w = 0;
2478                         $$.w2 = 0;
2479                 }
2480                 | RETURNRST '(' TTL NUMBER ')'  {
2481                         if ($4 < 0 || $4 > 255) {
2482                                 yyerror("illegal ttl value %" PRId64, $4);
2483                                 YYERROR;
2484                         }
2485                         $$.b2 = PFRULE_RETURNRST;
2486                         $$.w = $4;
2487                         $$.w2 = 0;
2488                 }
2489                 | RETURNICMP            {
2490                         $$.b2 = PFRULE_RETURNICMP;
2491                         $$.w = returnicmpdefault;
2492                         $$.w2 = returnicmp6default;
2493                 }
2494                 | RETURNICMP6           {
2495                         $$.b2 = PFRULE_RETURNICMP;
2496                         $$.w = returnicmpdefault;
2497                         $$.w2 = returnicmp6default;
2498                 }
2499                 | RETURNICMP '(' reticmpspec ')'        {
2500                         $$.b2 = PFRULE_RETURNICMP;
2501                         $$.w = $3;
2502                         $$.w2 = returnicmpdefault;
2503                 }
2504                 | RETURNICMP6 '(' reticmp6spec ')'      {
2505                         $$.b2 = PFRULE_RETURNICMP;
2506                         $$.w = returnicmpdefault;
2507                         $$.w2 = $3;
2508                 }
2509                 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2510                         $$.b2 = PFRULE_RETURNICMP;
2511                         $$.w = $3;
2512                         $$.w2 = $5;
2513                 }
2514                 | RETURN {
2515                         $$.b2 = PFRULE_RETURN;
2516                         $$.w = returnicmpdefault;
2517                         $$.w2 = returnicmp6default;
2518                 }
2519                 ;
2520
2521 reticmpspec     : STRING                        {
2522                         if (!($$ = parseicmpspec($1, AF_INET))) {
2523                                 free($1);
2524                                 YYERROR;
2525                         }
2526                         free($1);
2527                 }
2528                 | NUMBER                        {
2529                         u_int8_t                icmptype;
2530
2531                         if ($1 < 0 || $1 > 255) {
2532                                 yyerror("invalid icmp code %" PRId64, $1);
2533                                 YYERROR;
2534                         }
2535                         icmptype = returnicmpdefault >> 8;
2536                         $$ = (icmptype << 8 | $1);
2537                 }
2538                 ;
2539
2540 reticmp6spec    : STRING                        {
2541                         if (!($$ = parseicmpspec($1, AF_INET6))) {
2542                                 free($1);
2543                                 YYERROR;
2544                         }
2545                         free($1);
2546                 }
2547                 | NUMBER                        {
2548                         u_int8_t                icmptype;
2549
2550                         if ($1 < 0 || $1 > 255) {
2551                                 yyerror("invalid icmp code %" PRId64, $1);
2552                                 YYERROR;
2553                         }
2554                         icmptype = returnicmp6default >> 8;
2555                         $$ = (icmptype << 8 | $1);
2556                 }
2557                 ;
2558
2559 dir             : /* empty */                   { $$ = PF_INOUT; }
2560                 | IN                            { $$ = PF_IN; }
2561                 | OUT                           { $$ = PF_OUT; }
2562                 ;
2563
2564 quick           : /* empty */                   { $$.quick = 0; }
2565                 | QUICK                         { $$.quick = 1; }
2566                 ;
2567
2568 logquick        : /* empty */   { $$.log = 0; $$.quick = 0; $$.logif = 0; }
2569                 | log           { $$ = $1; $$.quick = 0; }
2570                 | QUICK         { $$.quick = 1; $$.log = 0; $$.logif = 0; }
2571                 | log QUICK     { $$ = $1; $$.quick = 1; }
2572                 | QUICK log     { $$ = $2; $$.quick = 1; }
2573                 ;
2574
2575 log             : LOG                   { $$.log = PF_LOG; $$.logif = 0; }
2576                 | LOG '(' logopts ')'   {
2577                         $$.log = PF_LOG | $3.log;
2578                         $$.logif = $3.logif;
2579                 }
2580                 ;
2581
2582 logopts         : logopt                        { $$ = $1; }
2583                 | logopts comma logopt          {
2584                         $$.log = $1.log | $3.log;
2585                         $$.logif = $3.logif;
2586                         if ($$.logif == 0)
2587                                 $$.logif = $1.logif;
2588                 }
2589                 ;
2590
2591 logopt          : ALL           { $$.log = PF_LOG_ALL; $$.logif = 0; }
2592                 | USER          { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2593                 | GROUP         { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2594                 | TO string     {
2595                         const char      *errstr;
2596                         u_int            i;
2597
2598                         $$.log = 0;
2599                         if (strncmp($2, "pflog", 5)) {
2600                                 yyerror("%s: should be a pflog interface", $2);
2601                                 free($2);
2602                                 YYERROR;
2603                         }
2604                         i = strtonum($2 + 5, 0, 255, &errstr);
2605                         if (errstr) {
2606                                 yyerror("%s: %s", $2, errstr);
2607                                 free($2);
2608                                 YYERROR;
2609                         }
2610                         free($2);
2611                         $$.logif = i;
2612                 }
2613                 ;
2614
2615 interface       : /* empty */                   { $$ = NULL; }
2616                 | ON if_item_not                { $$ = $2; }
2617                 | ON '{' optnl if_list '}'      { $$ = $4; }
2618                 ;
2619
2620 if_list         : if_item_not optnl             { $$ = $1; }
2621                 | if_list comma if_item_not optnl       {
2622                         $1->tail->next = $3;
2623                         $1->tail = $3;
2624                         $$ = $1;
2625                 }
2626                 ;
2627
2628 if_item_not     : not if_item                   { $$ = $2; $$->not = $1; }
2629                 ;
2630
2631 if_item         : STRING                        {
2632                         struct node_host        *n;
2633
2634                         $$ = calloc(1, sizeof(struct node_if));
2635                         if ($$ == NULL)
2636                                 err(1, "if_item: calloc");
2637                         if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2638                             sizeof($$->ifname)) {
2639                                 free($1);
2640                                 free($$);
2641                                 yyerror("interface name too long");
2642                                 YYERROR;
2643                         }
2644
2645                         if ((n = ifa_exists($1)) != NULL)
2646                                 $$->ifa_flags = n->ifa_flags;
2647
2648                         free($1);
2649                         $$->not = 0;
2650                         $$->next = NULL;
2651                         $$->tail = $$;
2652                 }
2653                 ;
2654
2655 af              : /* empty */                   { $$ = 0; }
2656                 | INET                          { $$ = AF_INET; }
2657                 | INET6                         { $$ = AF_INET6; }
2658                 ;
2659
2660 proto           : /* empty */                           { $$ = NULL; }
2661                 | PROTO proto_item                      { $$ = $2; }
2662                 | PROTO '{' optnl proto_list '}'        { $$ = $4; }
2663                 ;
2664
2665 proto_list      : proto_item optnl              { $$ = $1; }
2666                 | proto_list comma proto_item optnl     {
2667                         $1->tail->next = $3;
2668                         $1->tail = $3;
2669                         $$ = $1;
2670                 }
2671                 ;
2672
2673 proto_item      : protoval                      {
2674                         u_int8_t        pr;
2675
2676                         pr = (u_int8_t)$1;
2677                         if (pr == 0) {
2678                                 yyerror("proto 0 cannot be used");
2679                                 YYERROR;
2680                         }
2681                         $$ = calloc(1, sizeof(struct node_proto));
2682                         if ($$ == NULL)
2683                                 err(1, "proto_item: calloc");
2684                         $$->proto = pr;
2685                         $$->next = NULL;
2686                         $$->tail = $$;
2687                 }
2688                 ;
2689
2690 protoval        : STRING                        {
2691                         struct protoent *p;
2692
2693                         p = getprotobyname($1);
2694                         if (p == NULL) {
2695                                 yyerror("unknown protocol %s", $1);
2696                                 free($1);
2697                                 YYERROR;
2698                         }
2699                         $$ = p->p_proto;
2700                         free($1);
2701                 }
2702                 | NUMBER                        {
2703                         if ($1 < 0 || $1 > 255) {
2704                                 yyerror("protocol outside range");
2705                                 YYERROR;
2706                         }
2707                 }
2708                 ;
2709
2710 fromto          : ALL                           {
2711                         $$.src.host = NULL;
2712                         $$.src.port = NULL;
2713                         $$.dst.host = NULL;
2714                         $$.dst.port = NULL;
2715                         $$.src_os = NULL;
2716                 }
2717                 | from os to                    {
2718                         $$.src = $1;
2719                         $$.src_os = $2;
2720                         $$.dst = $3;
2721                 }
2722                 ;
2723
2724 os              : /* empty */                   { $$ = NULL; }
2725                 | OS xos                        { $$ = $2; }
2726                 | OS '{' optnl os_list '}'      { $$ = $4; }
2727                 ;
2728
2729 xos             : STRING {
2730                         $$ = calloc(1, sizeof(struct node_os));
2731                         if ($$ == NULL)
2732                                 err(1, "os: calloc");
2733                         $$->os = $1;
2734                         $$->tail = $$;
2735                 }
2736                 ;
2737
2738 os_list         : xos optnl                     { $$ = $1; }
2739                 | os_list comma xos optnl       {
2740                         $1->tail->next = $3;
2741                         $1->tail = $3;
2742                         $$ = $1;
2743                 }
2744                 ;
2745
2746 from            : /* empty */                   {
2747                         $$.host = NULL;
2748                         $$.port = NULL;
2749                 }
2750                 | FROM ipportspec               {
2751                         $$ = $2;
2752                 }
2753                 ;
2754
2755 to              : /* empty */                   {
2756                         $$.host = NULL;
2757                         $$.port = NULL;
2758                 }
2759                 | TO ipportspec         {
2760                         if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
2761                             "not permitted in a destination address"))
2762                                 YYERROR;
2763                         $$ = $2;
2764                 }
2765                 ;
2766
2767 ipportspec      : ipspec                        {
2768                         $$.host = $1;
2769                         $$.port = NULL;
2770                 }
2771                 | ipspec PORT portspec          {
2772                         $$.host = $1;
2773                         $$.port = $3;
2774                 }
2775                 | PORT portspec                 {
2776                         $$.host = NULL;
2777                         $$.port = $2;
2778                 }
2779                 ;
2780
2781 optnl           : '\n' optnl
2782                 |
2783                 ;
2784
2785 ipspec          : ANY                           { $$ = NULL; }
2786                 | xhost                         { $$ = $1; }
2787                 | '{' optnl host_list '}'       { $$ = $3; }
2788                 ;
2789
2790 toipspec        : TO ipspec                     { $$ = $2; }
2791                 | /* empty */                   { $$ = NULL; }
2792                 ;
2793
2794 host_list       : ipspec optnl                  { $$ = $1; }
2795                 | host_list comma ipspec optnl  {
2796                         if ($3 == NULL)
2797                                 $$ = $1;
2798                         else if ($1 == NULL)
2799                                 $$ = $3;
2800                         else {
2801                                 $1->tail->next = $3;
2802                                 $1->tail = $3->tail;
2803                                 $$ = $1;
2804                         }
2805                 }
2806                 ;
2807
2808 xhost           : not host                      {
2809                         struct node_host        *n;
2810
2811                         for (n = $2; n != NULL; n = n->next)
2812                                 n->not = $1;
2813                         $$ = $2;
2814                 }
2815                 | not NOROUTE                   {
2816                         $$ = calloc(1, sizeof(struct node_host));
2817                         if ($$ == NULL)
2818                                 err(1, "xhost: calloc");
2819                         $$->addr.type = PF_ADDR_NOROUTE;
2820                         $$->next = NULL;
2821                         $$->not = $1;
2822                         $$->tail = $$;
2823                 }
2824                 | not URPFFAILED                {
2825                         $$ = calloc(1, sizeof(struct node_host));
2826                         if ($$ == NULL)
2827                                 err(1, "xhost: calloc");
2828                         $$->addr.type = PF_ADDR_URPFFAILED;
2829                         $$->next = NULL;
2830                         $$->not = $1;
2831                         $$->tail = $$;
2832                 }
2833                 ;
2834
2835 host            : STRING                        {
2836                         if (($$ = host($1)) == NULL)    {
2837                                 /* error. "any" is handled elsewhere */
2838                                 free($1);
2839                                 yyerror("could not parse host specification");
2840                                 YYERROR;
2841                         }
2842                         free($1);
2843
2844                 }
2845                 | STRING '-' STRING             {
2846                         struct node_host *b, *e;
2847
2848                         if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
2849                                 free($1);
2850                                 free($3);
2851                                 yyerror("could not parse host specification");
2852                                 YYERROR;
2853                         }
2854                         if (b->af != e->af ||
2855                             b->addr.type != PF_ADDR_ADDRMASK ||
2856                             e->addr.type != PF_ADDR_ADDRMASK ||
2857                             unmask(&b->addr.v.a.mask, b->af) !=
2858                             (b->af == AF_INET ? 32 : 128) ||
2859                             unmask(&e->addr.v.a.mask, e->af) !=
2860                             (e->af == AF_INET ? 32 : 128) ||
2861                             b->next != NULL || b->not ||
2862                             e->next != NULL || e->not) {
2863                                 free(b);
2864                                 free(e);
2865                                 free($1);
2866                                 free($3);
2867                                 yyerror("invalid address range");
2868                                 YYERROR;
2869                         }
2870                         memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
2871                             sizeof(b->addr.v.a.mask));
2872                         b->addr.type = PF_ADDR_RANGE;
2873                         $$ = b;
2874                         free(e);
2875                         free($1);
2876                         free($3);
2877                 }
2878                 | STRING '/' NUMBER             {
2879                         char    *buf;
2880
2881                         if (asprintf(&buf, "%s/%" PRId64, $1, $3) == -1)
2882                                 err(1, "host: asprintf");
2883                         free($1);
2884                         if (($$ = host(buf)) == NULL)   {
2885                                 /* error. "any" is handled elsewhere */
2886                                 free(buf);
2887                                 yyerror("could not parse host specification");
2888                                 YYERROR;
2889                         }
2890                         free(buf);
2891                 }
2892                 | NUMBER '/' NUMBER             {
2893                         char    *buf;
2894
2895                         /* ie. for 10/8 parsing */
2896                         if (asprintf(&buf, "%" PRId64 "/%" PRId64, $1, $3) == -1)
2897                                 err(1, "host: asprintf");
2898                         if (($$ = host(buf)) == NULL)   {
2899                                 /* error. "any" is handled elsewhere */
2900                                 free(buf);
2901                                 yyerror("could not parse host specification");
2902                                 YYERROR;
2903                         }
2904                         free(buf);
2905                 }
2906                 | dynaddr
2907                 | dynaddr '/' NUMBER            {
2908                         struct node_host        *n;
2909
2910                         if ($3 < 0 || $3 > 128) {
2911                                 yyerror("bit number too big");
2912                                 YYERROR;
2913                         }
2914                         $$ = $1;
2915                         for (n = $1; n != NULL; n = n->next)
2916                                 set_ipmask(n, $3);
2917                 }
2918                 | '<' STRING '>'        {
2919                         if (strlen($2) >= PF_TABLE_NAME_SIZE) {
2920                                 yyerror("table name '%s' too long", $2);
2921                                 free($2);
2922                                 YYERROR;
2923                         }
2924                         $$ = calloc(1, sizeof(struct node_host));
2925                         if ($$ == NULL)
2926                                 err(1, "host: calloc");
2927                         $$->addr.type = PF_ADDR_TABLE;
2928                         if (strlcpy($$->addr.v.tblname, $2,
2929                             sizeof($$->addr.v.tblname)) >=
2930                             sizeof($$->addr.v.tblname))
2931                                 errx(1, "host: strlcpy");
2932                         free($2);
2933                         $$->next = NULL;
2934                         $$->tail = $$;
2935                 }
2936                 | ROUTE STRING          {
2937                         $$ = calloc(1, sizeof(struct node_host));
2938                         if ($$ == NULL) {
2939                                 free($2);
2940                                 err(1, "host: calloc");
2941                         }
2942                         $$->addr.type = PF_ADDR_RTLABEL;
2943                         if (strlcpy($$->addr.v.rtlabelname, $2,
2944                             sizeof($$->addr.v.rtlabelname)) >=
2945                             sizeof($$->addr.v.rtlabelname)) {
2946                                 yyerror("route label too long, max %zd chars",
2947                                     sizeof($$->addr.v.rtlabelname) - 1);
2948                                 free($2);
2949                                 free($$);
2950                                 YYERROR;
2951                         }
2952                         $$->next = NULL;
2953                         $$->tail = $$;
2954                         free($2);
2955                 }
2956                 ;
2957
2958 number          : NUMBER
2959                 | STRING                {
2960                         u_long  ulval;
2961
2962                         if (atoul($1, &ulval) == -1) {
2963                                 yyerror("%s is not a number", $1);
2964                                 free($1);
2965                                 YYERROR;
2966                         } else
2967                                 $$ = ulval;
2968                         free($1);
2969                 }
2970                 ;
2971
2972 dynaddr         : '(' STRING ')'                {
2973                         int      flags = 0;
2974                         char    *p, *op;
2975
2976                         op = $2;
2977                         if (!isalpha(op[0])) {
2978                                 yyerror("invalid interface name '%s'", op);
2979                                 free(op);
2980                                 YYERROR;
2981                         }
2982                         while ((p = strrchr($2, ':')) != NULL) {
2983                                 if (!strcmp(p+1, "network"))
2984                                         flags |= PFI_AFLAG_NETWORK;
2985                                 else if (!strcmp(p+1, "broadcast"))
2986                                         flags |= PFI_AFLAG_BROADCAST;
2987                                 else if (!strcmp(p+1, "peer"))
2988                                         flags |= PFI_AFLAG_PEER;
2989                                 else if (!strcmp(p+1, "0"))
2990                                         flags |= PFI_AFLAG_NOALIAS;
2991                                 else {
2992                                         yyerror("interface %s has bad modifier",
2993                                             $2);
2994                                         free(op);
2995                                         YYERROR;
2996                                 }
2997                                 *p = '\0';
2998                         }
2999                         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3000                                 free(op);
3001                                 yyerror("illegal combination of "
3002                                     "interface modifiers");
3003                                 YYERROR;
3004                         }
3005                         $$ = calloc(1, sizeof(struct node_host));
3006                         if ($$ == NULL)
3007                                 err(1, "address: calloc");
3008                         $$->af = 0;
3009                         set_ipmask($$, 128);
3010                         $$->addr.type = PF_ADDR_DYNIFTL;
3011                         $$->addr.iflags = flags;
3012                         if (strlcpy($$->addr.v.ifname, $2,
3013                             sizeof($$->addr.v.ifname)) >=
3014                             sizeof($$->addr.v.ifname)) {
3015                                 free(op);
3016                                 free($$);
3017                                 yyerror("interface name too long");
3018                                 YYERROR;
3019                         }
3020                         free(op);
3021                         $$->next = NULL;
3022                         $$->tail = $$;
3023                 }
3024                 ;
3025
3026 portspec        : port_item                     { $$ = $1; }
3027                 | '{' optnl port_list '}'       { $$ = $3; }
3028                 ;
3029
3030 port_list       : port_item optnl               { $$ = $1; }
3031                 | port_list comma port_item optnl       {
3032                         $1->tail->next = $3;
3033                         $1->tail = $3;
3034                         $$ = $1;
3035                 }
3036                 ;
3037
3038 port_item       : portrange                     {
3039                         $$ = calloc(1, sizeof(struct node_port));
3040                         if ($$ == NULL)
3041                                 err(1, "port_item: calloc");
3042                         $$->port[0] = $1.a;
3043                         $$->port[1] = $1.b;
3044                         if ($1.t)
3045                                 $$->op = PF_OP_RRG;
3046                         else
3047                                 $$->op = PF_OP_EQ;
3048                         $$->next = NULL;
3049                         $$->tail = $$;
3050                 }
3051                 | unaryop portrange     {
3052                         if ($2.t) {
3053                                 yyerror("':' cannot be used with an other "
3054                                     "port operator");
3055                                 YYERROR;
3056                         }
3057                         $$ = calloc(1, sizeof(struct node_port));
3058                         if ($$ == NULL)
3059                                 err(1, "port_item: calloc");
3060                         $$->port[0] = $2.a;
3061                         $$->port[1] = $2.b;
3062                         $$->op = $1;
3063                         $$->next = NULL;
3064                         $$->tail = $$;
3065                 }
3066                 | portrange PORTBINARY portrange        {
3067                         if ($1.t || $3.t) {
3068                                 yyerror("':' cannot be used with an other "
3069                                     "port operator");
3070                                 YYERROR;
3071                         }
3072                         $$ = calloc(1, sizeof(struct node_port));
3073                         if ($$ == NULL)
3074                                 err(1, "port_item: calloc");
3075                         $$->port[0] = $1.a;
3076                         $$->port[1] = $3.a;
3077                         $$->op = $2;
3078                         $$->next = NULL;
3079                         $$->tail = $$;
3080                 }
3081                 ;
3082
3083 portplain       : numberstring                  {
3084                         if (parseport($1, &$$, 0) == -1) {
3085                                 free($1);
3086                                 YYERROR;
3087                         }
3088                         free($1);
3089                 }
3090                 ;
3091
3092 portrange       : numberstring                  {
3093                         if (parseport($1, &$$, PPORT_RANGE) == -1) {
3094                                 free($1);
3095                                 YYERROR;
3096                         }
3097                         free($1);
3098                 }
3099                 ;
3100
3101 uids            : uid_item                      { $$ = $1; }
3102                 | '{' optnl uid_list '}'        { $$ = $3; }
3103                 ;
3104
3105 uid_list        : uid_item optnl                { $$ = $1; }
3106                 | uid_list comma uid_item optnl {
3107                         $1->tail->next = $3;
3108                         $1->tail = $3;
3109                         $$ = $1;
3110                 }
3111                 ;
3112
3113 uid_item        : uid                           {
3114                         $$ = calloc(1, sizeof(struct node_uid));
3115                         if ($$ == NULL)
3116                                 err(1, "uid_item: calloc");
3117                         $$->uid[0] = $1;
3118                         $$->uid[1] = $1;
3119                         $$->op = PF_OP_EQ;
3120                         $$->next = NULL;
3121                         $$->tail = $$;
3122                 }
3123                 | unaryop uid                   {
3124                         if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3125                                 yyerror("user unknown requires operator = or "
3126                                     "!=");
3127                                 YYERROR;
3128                         }
3129                         $$ = calloc(1, sizeof(struct node_uid));
3130                         if ($$ == NULL)
3131                                 err(1, "uid_item: calloc");
3132                         $$->uid[0] = $2;
3133                         $$->uid[1] = $2;
3134                         $$->op = $1;
3135                         $$->next = NULL;
3136                         $$->tail = $$;
3137                 }
3138                 | uid PORTBINARY uid            {
3139                         if ($1 == UID_MAX || $3 == UID_MAX) {
3140                                 yyerror("user unknown requires operator = or "
3141                                     "!=");
3142                                 YYERROR;
3143                         }
3144                         $$ = calloc(1, sizeof(struct node_uid));
3145                         if ($$ == NULL)
3146                                 err(1, "uid_item: calloc");
3147                         $$->uid[0] = $1;
3148                         $$->uid[1] = $3;
3149                         $$->op = $2;
3150                         $$->next = NULL;
3151                         $$->tail = $$;
3152                 }
3153                 ;
3154
3155 uid             : STRING                        {
3156                         if (!strcmp($1, "unknown"))
3157                                 $$ = UID_MAX;
3158                         else {
3159                                 struct passwd   *pw;
3160
3161                                 if ((pw = getpwnam($1)) == NULL) {
3162                                         yyerror("unknown user %s", $1);
3163                                         free($1);
3164                                         YYERROR;
3165                                 }
3166                                 $$ = pw->pw_uid;
3167                         }
3168                         free($1);
3169                 }
3170                 | NUMBER                        {
3171                         if ($1 < 0 || $1 >= UID_MAX) {
3172                                 yyerror("illegal uid value %" PRId64, $1);
3173                                 YYERROR;
3174                         }
3175                         $$ = $1;
3176                 }
3177                 ;
3178
3179 gids            : gid_item                      { $$ = $1; }
3180                 | '{' optnl gid_list '}'        { $$ = $3; }
3181                 ;
3182
3183 gid_list        : gid_item optnl                { $$ = $1; }
3184                 | gid_list comma gid_item optnl {
3185                         $1->tail->next = $3;
3186                         $1->tail = $3;
3187                         $$ = $1;
3188                 }
3189                 ;
3190
3191 gid_item        : gid                           {
3192                         $$ = calloc(1, sizeof(struct node_gid));
3193                         if ($$ == NULL)
3194                                 err(1, "gid_item: calloc");
3195                         $$->gid[0] = $1;
3196                         $$->gid[1] = $1;
3197                         $$->op = PF_OP_EQ;
3198                         $$->next = NULL;
3199                         $$->tail = $$;
3200                 }
3201                 | unaryop gid                   {
3202                         if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3203                                 yyerror("group unknown requires operator = or "
3204                                     "!=");
3205                                 YYERROR;
3206                         }
3207                         $$ = calloc(1, sizeof(struct node_gid));
3208                         if ($$ == NULL)
3209                                 err(1, "gid_item: calloc");
3210                         $$->gid[0] = $2;
3211                         $$->gid[1] = $2;
3212                         $$->op = $1;
3213                         $$->next = NULL;
3214                         $$->tail = $$;
3215                 }
3216                 | gid PORTBINARY gid            {
3217                         if ($1 == GID_MAX || $3 == GID_MAX) {
3218                                 yyerror("group unknown requires operator = or "
3219                                     "!=");
3220                                 YYERROR;
3221                         }
3222                         $$ = calloc(1, sizeof(struct node_gid));
3223                         if ($$ == NULL)
3224                                 err(1, "gid_item: calloc");
3225                         $$->gid[0] = $1;
3226                         $$->gid[1] = $3;
3227                         $$->op = $2;
3228                         $$->next = NULL;
3229                         $$->tail = $$;
3230                 }
3231                 ;
3232
3233 gid             : STRING                        {
3234                         if (!strcmp($1, "unknown"))
3235                                 $$ = GID_MAX;
3236                         else {
3237                                 struct group    *grp;
3238
3239                                 if ((grp = getgrnam($1)) == NULL) {
3240                                         yyerror("unknown group %s", $1);
3241                                         free($1);
3242                                         YYERROR;
3243                                 }
3244                                 $$ = grp->gr_gid;
3245                         }
3246                         free($1);
3247                 }
3248                 | NUMBER                        {
3249                         if ($1 < 0 || $1 >= GID_MAX) {
3250                                 yyerror("illegal gid value %" PRId64, $1);
3251                                 YYERROR;
3252                         }
3253                         $$ = $1;
3254                 }
3255                 ;
3256
3257 flag            : STRING                        {
3258                         int     f;
3259
3260                         if ((f = parse_flags($1)) < 0) {
3261                                 yyerror("bad flags %s", $1);
3262                                 free($1);
3263                                 YYERROR;
3264                         }
3265                         free($1);
3266                         $$.b1 = f;
3267                 }
3268                 ;
3269
3270 flags           : FLAGS flag '/' flag   { $$.b1 = $2.b1; $$.b2 = $4.b1; }
3271                 | FLAGS '/' flag        { $$.b1 = 0; $$.b2 = $3.b1; }
3272                 | FLAGS ANY             { $$.b1 = 0; $$.b2 = 0; }
3273                 ;
3274
3275 icmpspec        : ICMPTYPE icmp_item                    { $$ = $2; }
3276                 | ICMPTYPE '{' optnl icmp_list '}'      { $$ = $4; }
3277                 | ICMP6TYPE icmp6_item                  { $$ = $2; }
3278                 | ICMP6TYPE '{' optnl icmp6_list '}'    { $$ = $4; }
3279                 ;
3280
3281 icmp_list       : icmp_item optnl               { $$ = $1; }
3282                 | icmp_list comma icmp_item optnl {
3283                         $1->tail->next = $3;
3284                         $1->tail = $3;
3285                         $$ = $1;
3286                 }
3287                 ;
3288
3289 icmp6_list      : icmp6_item optnl              { $$ = $1; }
3290                 | icmp6_list comma icmp6_item optnl {
3291                         $1->tail->next = $3;
3292                         $1->tail = $3;
3293                         $$ = $1;
3294                 }
3295                 ;
3296
3297 icmp_item       : icmptype              {
3298                         $$ = calloc(1, sizeof(struct node_icmp));
3299                         if ($$ == NULL)
3300                                 err(1, "icmp_item: calloc");
3301                         $$->type = $1;
3302                         $$->code = 0;
3303                         $$->proto = IPPROTO_ICMP;
3304                         $$->next = NULL;
3305                         $$->tail = $$;
3306                 }
3307                 | icmptype CODE STRING  {
3308                         const struct icmpcodeent        *p;
3309
3310                         if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3311                                 yyerror("unknown icmp-code %s", $3);
3312                                 free($3);
3313                                 YYERROR;
3314                         }
3315
3316                         free($3);
3317                         $$ = calloc(1, sizeof(struct node_icmp));
3318                         if ($$ == NULL)
3319                                 err(1, "icmp_item: calloc");
3320                         $$->type = $1;
3321                         $$->code = p->code + 1;
3322                         $$->proto = IPPROTO_ICMP;
3323                         $$->next = NULL;
3324                         $$->tail = $$;
3325                 }
3326                 | icmptype CODE NUMBER  {
3327                         if ($3 < 0 || $3 > 255) {
3328                                 yyerror("illegal icmp-code %" PRId64, $3);
3329                                 YYERROR;
3330                         }
3331                         $$ = calloc(1, sizeof(struct node_icmp));
3332                         if ($$ == NULL)
3333                                 err(1, "icmp_item: calloc");
3334                         $$->type = $1;
3335                         $$->code = $3 + 1;
3336                         $$->proto = IPPROTO_ICMP;
3337                         $$->next = NULL;
3338                         $$->tail = $$;
3339                 }
3340                 ;
3341
3342 icmp6_item      : icmp6type             {
3343                         $$ = calloc(1, sizeof(struct node_icmp));
3344                         if ($$ == NULL)
3345                                 err(1, "icmp_item: calloc");
3346                         $$->type = $1;
3347                         $$->code = 0;
3348                         $$->proto = IPPROTO_ICMPV6;
3349                         $$->next = NULL;
3350                         $$->tail = $$;
3351                 }
3352                 | icmp6type CODE STRING {
3353                         const struct icmpcodeent        *p;
3354
3355                         if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3356                                 yyerror("unknown icmp6-code %s", $3);
3357                                 free($3);
3358                                 YYERROR;
3359                         }
3360                         free($3);
3361
3362                         $$ = calloc(1, sizeof(struct node_icmp));
3363                         if ($$ == NULL)
3364                                 err(1, "icmp_item: calloc");
3365                         $$->type = $1;
3366                         $$->code = p->code + 1;
3367                         $$->proto = IPPROTO_ICMPV6;
3368                         $$->next = NULL;
3369                         $$->tail = $$;
3370                 }
3371                 | icmp6type CODE NUMBER {
3372                         if ($3 < 0 || $3 > 255) {
3373                                 yyerror("illegal icmp-code %" PRId64, $3);
3374                                 YYERROR;
3375                         }
3376                         $$ = calloc(1, sizeof(struct node_icmp));
3377                         if ($$ == NULL)
3378                                 err(1, "icmp_item: calloc");
3379                         $$->type = $1;
3380                         $$->code = $3 + 1;
3381                         $$->proto = IPPROTO_ICMPV6;
3382                         $$->next = NULL;
3383                         $$->tail = $$;
3384                 }
3385                 ;
3386
3387 icmptype        : STRING                        {
3388                         const struct icmptypeent        *p;
3389
3390                         if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3391                                 yyerror("unknown icmp-type %s", $1);
3392                                 free($1);
3393                                 YYERROR;
3394                         }
3395                         $$ = p->type + 1;
3396                         free($1);
3397                 }
3398                 | NUMBER                        {
3399                         if ($1 < 0 || $1 > 255) {
3400                                 yyerror("illegal icmp-type %" PRId64, $1);
3401                                 YYERROR;
3402                         }
3403                         $$ = $1 + 1;
3404                 }
3405                 ;
3406
3407 icmp6type       : STRING                        {
3408                         const struct icmptypeent        *p;
3409
3410                         if ((p = geticmptypebyname($1, AF_INET6)) ==
3411                             NULL) {
3412                                 yyerror("unknown icmp6-type %s", $1);
3413                                 free($1);
3414                                 YYERROR;
3415                         }
3416                         $$ = p->type + 1;
3417                         free($1);
3418                 }
3419                 | NUMBER                        {
3420                         if ($1 < 0 || $1 > 255) {
3421                                 yyerror("illegal icmp6-type %" PRId64, $1);
3422                                 YYERROR;
3423                         }
3424                         $$ = $1 + 1;
3425                 }
3426                 ;
3427
3428 tos     : STRING                        {
3429                         if (!strcmp($1, "lowdelay"))
3430                                 $$ = IPTOS_LOWDELAY;
3431                         else if (!strcmp($1, "throughput"))
3432                                 $$ = IPTOS_THROUGHPUT;
3433                         else if (!strcmp($1, "reliability"))
3434                                 $$ = IPTOS_RELIABILITY;
3435                         else if ($1[0] == '0' && $1[1] == 'x')
3436                                 $$ = strtoul($1, NULL, 16);
3437                         else
3438                                 $$ = 0;         /* flag bad argument */
3439                         if (!$$ || $$ > 255) {
3440                                 yyerror("illegal tos value %s", $1);
3441                                 free($1);
3442                                 YYERROR;
3443                         }
3444                         free($1);
3445                 }
3446                 | NUMBER                        {
3447                         $$ = $1;
3448                         if (!$$ || $$ > 255) {
3449                                 yyerror("illegal tos value %" PRId64, $1);
3450                                 YYERROR;
3451                         }
3452                 }
3453                 ;
3454
3455 sourcetrack     : SOURCETRACK           { $$ = PF_SRCTRACK; }
3456                 | SOURCETRACK GLOBAL    { $$ = PF_SRCTRACK_GLOBAL; }
3457                 | SOURCETRACK RULE      { $$ = PF_SRCTRACK_RULE; }
3458                 ;
3459
3460 statelock       : IFBOUND {
3461                         $$ = PFRULE_IFBOUND;
3462                 }
3463                 | FLOATING {
3464                         $$ = 0;
3465                 }
3466                 ;
3467
3468 keep            : NO STATE                      {
3469                         $$.action = 0;
3470                         $$.options = NULL;
3471                 }
3472                 | KEEP STATE state_opt_spec     {
3473                         $$.action = PF_STATE_NORMAL;
3474                         $$.options = $3;
3475                 }
3476                 | MODULATE STATE state_opt_spec {
3477                         $$.action = PF_STATE_MODULATE;
3478                         $$.options = $3;
3479                 }
3480                 | SYNPROXY STATE state_opt_spec {
3481                         $$.action = PF_STATE_SYNPROXY;
3482                         $$.options = $3;
3483                 }
3484                 ;
3485
3486 flush           : /* empty */                   { $$ = 0; }
3487                 | FLUSH                         { $$ = PF_FLUSH; }
3488                 | FLUSH GLOBAL                  {
3489                         $$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3490                 }
3491                 ;
3492
3493 state_opt_spec  : '(' state_opt_list ')'        { $$ = $2; }
3494                 | /* empty */                   { $$ = NULL; }
3495                 ;
3496
3497 state_opt_list  : state_opt_item                { $$ = $1; }
3498                 | state_opt_list comma state_opt_item {
3499                         $1->tail->next = $3;
3500                         $1->tail = $3;
3501                         $$ = $1;
3502                 }
3503                 ;
3504
3505 state_opt_item  : MAXIMUM NUMBER                {
3506                         if ($2 < 0 || $2 > UINT_MAX) {
3507                                 yyerror("only positive values permitted");
3508                                 YYERROR;
3509                         }
3510                         $$ = calloc(1, sizeof(struct node_state_opt));
3511                         if ($$ == NULL)
3512                                 err(1, "state_opt_item: calloc");
3513                         $$->type = PF_STATE_OPT_MAX;
3514                         $$->data.max_states = $2;
3515                         $$->next = NULL;
3516                         $$->tail = $$;
3517                 }
3518                 | NOSYNC                                {
3519                         $$ = calloc(1, sizeof(struct node_state_opt));
3520                         if ($$ == NULL)
3521                                 err(1, "state_opt_item: calloc");
3522                         $$->type = PF_STATE_OPT_NOSYNC;
3523                         $$->next = NULL;
3524                         $$->tail = $$;
3525                 }
3526                 | MAXSRCSTATES NUMBER                   {
3527                         if ($2 < 0 || $2 > UINT_MAX) {
3528                                 yyerror("only positive values permitted");
3529                                 YYERROR;
3530                         }
3531                         $$ = calloc(1, sizeof(struct node_state_opt));
3532                         if ($$ == NULL)
3533                                 err(1, "state_opt_item: calloc");
3534                         $$->type = PF_STATE_OPT_MAX_SRC_STATES;
3535                         $$->data.max_src_states = $2;
3536                         $$->next = NULL;
3537                         $$->tail = $$;
3538                 }
3539                 | MAXSRCCONN NUMBER                     {
3540                         if ($2 < 0 || $2 > UINT_MAX) {
3541                                 yyerror("only positive values permitted");
3542                                 YYERROR;
3543                         }
3544                         $$ = calloc(1, sizeof(struct node_state_opt));
3545                         if ($$ == NULL)
3546                                 err(1, "state_opt_item: calloc");
3547                         $$->type = PF_STATE_OPT_MAX_SRC_CONN;
3548                         $$->data.max_src_conn = $2;
3549                         $$->next = NULL;
3550                         $$->tail = $$;
3551                 }
3552                 | MAXSRCCONNRATE NUMBER '/' NUMBER      {
3553                         if ($2 < 0 || $2 > UINT_MAX ||
3554                             $4 < 0 || $4 > UINT_MAX) {
3555                                 yyerror("only positive values permitted");
3556                                 YYERROR;
3557                         }
3558                         $$ = calloc(1, sizeof(struct node_state_opt));
3559                         if ($$ == NULL)
3560                                 err(1, "state_opt_item: calloc");
3561                         $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3562                         $$->data.max_src_conn_rate.limit = $2;
3563                         $$->data.max_src_conn_rate.seconds = $4;
3564                         $$->next = NULL;
3565                         $$->tail = $$;
3566                 }
3567                 | OVERLOAD '<' STRING '>' flush         {
3568                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3569                                 yyerror("table name '%s' too long", $3);
3570                                 free($3);
3571                                 YYERROR;
3572                         }
3573                         $$ = calloc(1, sizeof(struct node_state_opt));
3574                         if ($$ == NULL)
3575                                 err(1, "state_opt_item: calloc");
3576                         if (strlcpy($$->data.overload.tblname, $3,
3577                             PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3578                                 errx(1, "state_opt_item: strlcpy");
3579                         free($3);
3580                         $$->type = PF_STATE_OPT_OVERLOAD;
3581                         $$->data.overload.flush = $5;
3582                         $$->next = NULL;
3583                         $$->tail = $$;
3584                 }
3585                 | MAXSRCNODES NUMBER                    {
3586                         if ($2 < 0 || $2 > UINT_MAX) {
3587                                 yyerror("only positive values permitted");
3588                                 YYERROR;
3589                         }
3590                         $$ = calloc(1, sizeof(struct node_state_opt));
3591                         if ($$ == NULL)
3592                                 err(1, "state_opt_item: calloc");
3593                         $$->type = PF_STATE_OPT_MAX_SRC_NODES;
3594                         $$->data.max_src_nodes = $2;
3595                         $$->next = NULL;
3596                         $$->tail = $$;
3597                 }
3598                 | PICKUPS                               {
3599                         $$ = calloc(1, sizeof(struct node_state_opt));
3600                         if ($$ == NULL)
3601                                 err(1, "state_opt_item: calloc");
3602                         $$->type = PF_STATE_OPT_PICKUPS;
3603                         $$->data.pickup_mode = PF_PICKUPS_ENABLED;
3604                         $$->next = NULL;
3605                         $$->tail = $$;
3606                 }
3607                 | NOPICKUPS                             {
3608                         $$ = calloc(1, sizeof(struct node_state_opt));
3609                         if ($$ == NULL)
3610                                 err(1, "state_opt_item: calloc");
3611                         $$->type = PF_STATE_OPT_PICKUPS;
3612                         $$->data.pickup_mode = PF_PICKUPS_DISABLED;
3613                         $$->next = NULL;
3614                         $$->tail = $$;
3615                 }
3616                 | HASHONLY                              {
3617                         $$ = calloc(1, sizeof(struct node_state_opt));
3618                         if ($$ == NULL)
3619                                 err(1, "state_opt_item: calloc");
3620                         $$->type = PF_STATE_OPT_PICKUPS;
3621                         $$->data.pickup_mode = PF_PICKUPS_HASHONLY;
3622                         $$->next = NULL;
3623                         $$->tail = $$;
3624                 }
3625                 | sourcetrack {
3626                         $$ = calloc(1, sizeof(struct node_state_opt));
3627                         if ($$ == NULL)
3628                                 err(1, "state_opt_item: calloc");
3629                         $$->type = PF_STATE_OPT_SRCTRACK;
3630                         $$->data.src_track = $1;
3631                         $$->next = NULL;
3632                         $$->tail = $$;
3633                 }
3634                 | statelock {
3635                         $$ = calloc(1, sizeof(struct node_state_opt));
3636                         if ($$ == NULL)
3637                                 err(1, "state_opt_item: calloc");
3638                         $$->type = PF_STATE_OPT_STATELOCK;
3639                         $$->data.statelock = $1;
3640                         $$->next = NULL;
3641                         $$->tail = $$;
3642                 }
3643                 | SLOPPY {
3644                         $$ = calloc(1, sizeof(struct node_state_opt));
3645                         if ($$ == NULL)
3646                                 err(1, "state_opt_item: calloc");
3647                         $$->type = PF_STATE_OPT_SLOPPY;
3648                         $$->next = NULL;
3649                         $$->tail = $$;
3650                 }
3651                 | STRING NUMBER                 {
3652                         int     i;
3653
3654                         if ($2 < 0 || $2 > UINT_MAX) {
3655                                 yyerror("only positive values permitted");
3656                                 YYERROR;
3657                         }
3658                         for (i = 0; pf_timeouts[i].name &&
3659                             strcmp(pf_timeouts[i].name, $1); ++i)
3660                                 ;       /* nothing */
3661                         if (!pf_timeouts[i].name) {
3662                                 yyerror("illegal timeout name %s", $1);
3663                                 free($1);
3664                                 YYERROR;
3665                         }
3666                         if (strchr(pf_timeouts[i].name, '.') == NULL) {
3667                                 yyerror("illegal state timeout %s", $1);
3668                                 free($1);
3669                                 YYERROR;
3670                         }
3671                         free($1);
3672                         $$ = calloc(1, sizeof(struct node_state_opt));
3673                         if ($$ == NULL)
3674                                 err(1, "state_opt_item: calloc");
3675                         $$->type = PF_STATE_OPT_TIMEOUT;
3676                         $$->data.timeout.number = pf_timeouts[i].timeout;
3677                         $$->data.timeout.seconds = $2;
3678                         $$->next = NULL;
3679                         $$->tail = $$;
3680                 }
3681                 ;
3682
3683 label           : LABEL STRING                  {
3684                         $$ = $2;
3685                 }
3686                 ;
3687
3688 qname           : QUEUE STRING                          {
3689                         $$.qname = $2;
3690                         $$.pqname = NULL;
3691                 }
3692                 | QUEUE '(' STRING ')'                  {
3693                         $$.qname = $3;
3694                         $$.pqname = NULL;
3695                 }
3696                 | QUEUE '(' STRING comma STRING ')'     {
3697                         $$.qname = $3;
3698                         $$.pqname = $5;
3699                 }
3700                 ;
3701
3702 no              : /* empty */                   { $$ = 0; }
3703                 | NO                            { $$ = 1; }
3704                 ;
3705
3706 portstar        : numberstring                  {
3707                         if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3708                                 free($1);
3709                                 YYERROR;
3710                         }
3711                         free($1);
3712                 }
3713                 ;
3714
3715 redirspec       : host                          { $$ = $1; }
3716                 | '{' optnl redir_host_list '}' { $$ = $3; }
3717                 ;
3718
3719 redir_host_list : host optnl                    { $$ = $1; }
3720                 | redir_host_list comma host optnl {
3721                         $1->tail->next = $3;
3722                         $1->tail = $3->tail;
3723                         $$ = $1;
3724                 }
3725                 ;
3726
3727 redirpool       : /* empty */                   { $$ = NULL; }
3728                 | ARROW redirspec               {
3729                         $$ = calloc(1, sizeof(struct redirection));
3730                         if ($$ == NULL)
3731                                 err(1, "redirection: calloc");
3732                         $$->host = $2;
3733                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3734                 }
3735                 | ARROW redirspec PORT portstar {
3736                         $$ = calloc(1, sizeof(struct redirection));
3737                         if ($$ == NULL)
3738                                 err(1, "redirection: calloc");
3739                         $$->host = $2;
3740                         $$->rport = $4;
3741                 }
3742                 ;
3743
3744 hashkey         : /* empty */
3745                 {
3746                         $$ = calloc(1, sizeof(struct pf_poolhashkey));
3747                         if ($$ == NULL)
3748                                 err(1, "hashkey: calloc");
3749                         $$->key32[0] = arc4random();
3750                         $$->key32[1] = arc4random();
3751                         $$->key32[2] = arc4random();
3752                         $$->key32[3] = arc4random();
3753                 }
3754                 | string
3755                 {
3756                         if (!strncmp($1, "0x", 2)) {
3757                                 if (strlen($1) != 34) {
3758                                         free($1);
3759                                         yyerror("hex key must be 128 bits "
3760                                                 "(32 hex digits) long");
3761                                         YYERROR;
3762                                 }
3763                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3764                                 if ($$ == NULL)
3765                                         err(1, "hashkey: calloc");
3766
3767                                 if (sscanf($1, "0x%8x%8x%8x%8x",
3768                                     &$$->key32[0], &$$->key32[1],
3769                                     &$$->key32[2], &$$->key32[3]) != 4) {
3770                                         free($$);
3771                                         free($1);
3772                                         yyerror("invalid hex key");
3773                                         YYERROR;
3774                                 }
3775                         } else {
3776                                 MD5_CTX context;
3777
3778                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3779                                 if ($$ == NULL)
3780                                         err(1, "hashkey: calloc");
3781                                 MD5Init(&context);
3782                                 MD5Update(&context, (unsigned char *)$1,
3783                                     strlen($1));
3784                                 MD5Final((unsigned char *)$$, &context);
3785                                 $$->key32[0] = htonl($$->key32[0]);
3786                                 $$->key32[1] = htonl($$->key32[1]);
3787                                 $$->key32[2] = htonl($$->key32[2]);
3788                                 $$->key32[3] = htonl($$->key32[3]);
3789                         }
3790                         free($1);
3791                 }
3792                 ;
3793
3794 pool_opts       :       { bzero(&pool_opts, sizeof pool_opts); }
3795                     pool_opts_l
3796                         { $$ = pool_opts; }
3797                 | /* empty */   {
3798                         bzero(&pool_opts, sizeof pool_opts);
3799                         $$ = pool_opts;
3800                 }
3801                 ;
3802
3803 pool_opts_l     : pool_opts_l pool_opt
3804                 | pool_opt
3805                 ;
3806
3807 pool_opt        : BITMASK       {
3808                         if (pool_opts.type) {
3809                                 yyerror("pool type cannot be redefined");
3810                                 YYERROR;
3811                         }
3812                         pool_opts.type =  PF_POOL_BITMASK;
3813                 }
3814                 | RANDOM        {
3815                         if (pool_opts.type) {
3816                                 yyerror("pool type cannot be redefined");
3817                                 YYERROR;
3818                         }
3819                         pool_opts.type = PF_POOL_RANDOM;
3820                 }
3821                 | SOURCEHASH hashkey {
3822                         if (pool_opts.type) {
3823                                 yyerror("pool type cannot be redefined");
3824                                 YYERROR;
3825                         }
3826                         pool_opts.type = PF_POOL_SRCHASH;
3827                         pool_opts.key = $2;
3828                 }
3829                 | ROUNDROBIN    {
3830                         if (pool_opts.type) {
3831                                 yyerror("pool type cannot be redefined");
3832                                 YYERROR;
3833                         }
3834                         pool_opts.type = PF_POOL_ROUNDROBIN;
3835                 }
3836                 | STATICPORT    {
3837                         if (pool_opts.staticport) {
3838                                 yyerror("static-port cannot be redefined");
3839                                 YYERROR;
3840                         }
3841                         pool_opts.staticport = 1;
3842                 }
3843                 | STICKYADDRESS {
3844                         if (filter_opts.marker & POM_STICKYADDRESS) {
3845                                 yyerror("sticky-address cannot be redefined");
3846                                 YYERROR;
3847                         }
3848                         pool_opts.marker |= POM_STICKYADDRESS;
3849                         pool_opts.opts |= PF_POOL_STICKYADDR;
3850                 }
3851                 ;
3852
3853 redirection     : /* empty */                   { $$ = NULL; }
3854                 | ARROW host                    {
3855                         $$ = calloc(1, sizeof(struct redirection));
3856                         if ($$ == NULL)
3857                                 err(1, "redirection: calloc");
3858                         $$->host = $2;
3859                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3860                 }
3861                 | ARROW host PORT portstar      {
3862                         $$ = calloc(1, sizeof(struct redirection));
3863                         if ($$ == NULL)
3864                                 err(1, "redirection: calloc");
3865                         $$->host = $2;
3866                         $$->rport = $4;
3867                 }
3868                 ;
3869
3870 natpasslog      : /* empty */   { $$.b1 = $$.b2 = 0; $$.w2 = 0; }
3871                 | PASS          { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
3872                 | PASS log      { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
3873                 | log           { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
3874                 ;
3875
3876 nataction       : no NAT natpasslog {
3877                         if ($1 && $3.b1) {
3878                                 yyerror("\"pass\" not valid with \"no\"");
3879                                 YYERROR;
3880                         }
3881                         if ($1)
3882                                 $$.b1 = PF_NONAT;
3883                         else
3884                                 $$.b1 = PF_NAT;
3885                         $$.b2 = $3.b1;
3886                         $$.w = $3.b2;
3887                         $$.w2 = $3.w2;
3888                 }
3889                 | no RDR natpasslog {
3890                         if ($1 && $3.b1) {
3891                                 yyerror("\"pass\" not valid with \"no\"");
3892                                 YYERROR;
3893                         }
3894                         if ($1)
3895                                 $$.b1 = PF_NORDR;
3896                         else
3897                                 $$.b1 = PF_RDR;
3898                         $$.b2 = $3.b1;
3899                         $$.w = $3.b2;
3900                         $$.w2 = $3.w2;
3901                 }
3902                 ;
3903
3904 natrule         : nataction interface af proto fromto tag tagged rtable
3905                     redirpool pool_opts
3906                 {
3907                         struct pf_rule  r;
3908
3909                         if (check_rulestate(PFCTL_STATE_NAT))
3910                                 YYERROR;
3911
3912                         memset(&r, 0, sizeof(r));
3913
3914                         r.action = $1.b1;
3915                         r.natpass = $1.b2;
3916                         r.log = $1.w;
3917                         r.logif = $1.w2;
3918                         r.af = $3;
3919
3920                         if (!r.af) {
3921                                 if ($5.src.host && $5.src.host->af &&
3922                                     !$5.src.host->ifindex)
3923                                         r.af = $5.src.host->af;
3924                                 else if ($5.dst.host && $5.dst.host->af &&
3925                                     !$5.dst.host->ifindex)
3926                                         r.af = $5.dst.host->af;
3927                         }
3928
3929                         if ($6 != NULL)
3930                                 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
3931                                     PF_TAG_NAME_SIZE) {
3932                                         yyerror("tag too long, max %u chars",
3933                                             PF_TAG_NAME_SIZE - 1);
3934                                         YYERROR;
3935                                 }
3936
3937                         if ($7.name)
3938                                 if (strlcpy(r.match_tagname, $7.name,
3939                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
3940                                         yyerror("tag too long, max %u chars",
3941                                             PF_TAG_NAME_SIZE - 1);
3942                                         YYERROR;
3943                                 }
3944                         r.match_tag_not = $7.neg;
3945                         r.rtableid = $8;
3946
3947                         if (r.action == PF_NONAT || r.action == PF_NORDR) {
3948                                 if ($9 != NULL) {
3949                                         yyerror("translation rule with 'no' "
3950                                             "does not need '->'");
3951                                         YYERROR;
3952                                 }
3953                         } else {
3954                                 if ($9 == NULL || $9->host == NULL) {
3955                                         yyerror("translation rule requires '-> "
3956                                             "address'");
3957                                         YYERROR;
3958                                 }
3959                                 if (!r.af && ! $9->host->ifindex)
3960                                         r.af = $9->host->af;
3961
3962                                 remove_invalid_hosts(&$9->host, &r.af);
3963                                 if (invalid_redirect($9->host, r.af))
3964                                         YYERROR;
3965                                 if (check_netmask($9->host, r.af))
3966                                         YYERROR;
3967
3968                                 r.rpool.proxy_port[0] = ntohs($9->rport.a);
3969
3970                                 switch (r.action) {
3971                                 case PF_RDR:
3972                                         if (!$9->rport.b && $9->rport.t &&
3973                                             $5.dst.port != NULL) {
3974                                                 r.rpool.proxy_port[1] =
3975                                                     ntohs($9->rport.a) +
3976                                                     (ntohs(
3977                                                     $5.dst.port->port[1]) -
3978                                                     ntohs(
3979                                                     $5.dst.port->port[0]));
3980                                         } else
3981                                                 r.rpool.proxy_port[1] =
3982                                                     ntohs($9->rport.b);
3983                                         break;
3984                                 case PF_NAT:
3985                                         r.rpool.proxy_port[1] =
3986                                             ntohs($9->rport.b);
3987                                         if (!r.rpool.proxy_port[0] &&
3988                                             !r.rpool.proxy_port[1]) {
3989                                                 r.rpool.proxy_port[0] =
3990                                                     PF_NAT_PROXY_PORT_LOW;
3991                                                 r.rpool.proxy_port[1] =
3992                                                     PF_NAT_PROXY_PORT_HIGH;
3993                                         } else if (!r.rpool.proxy_port[1])
3994                                                 r.rpool.proxy_port[1] =
3995                                                     r.rpool.proxy_port[0];
3996                                         break;
3997                                 default:
3998                                         break;
3999                                 }
4000
4001                                 r.rpool.opts = $10.type;
4002                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
4003                                     PF_POOL_NONE && ($9->host->next != NULL ||
4004                                     $9->host->addr.type == PF_ADDR_TABLE ||
4005                                     DYNIF_MULTIADDR($9->host->addr)))
4006                                         r.rpool.opts = PF_POOL_ROUNDROBIN;
4007                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4008                                     PF_POOL_ROUNDROBIN &&
4009                                     disallow_table($9->host, "tables are only "
4010                                     "supported in round-robin redirection "
4011                                     "pools"))
4012                                         YYERROR;
4013                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4014                                     PF_POOL_ROUNDROBIN &&
4015                                     disallow_alias($9->host, "interface (%s) "
4016                                     "is only supported in round-robin "
4017                                     "redirection pools"))
4018                                         YYERROR;
4019                                 if ($9->host->next != NULL) {
4020                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4021                                             PF_POOL_ROUNDROBIN) {
4022                                                 yyerror("only round-robin "
4023                                                     "valid for multiple "
4024                                                     "redirection addresses");
4025                                                 YYERROR;
4026                                         }
4027                                 }
4028                         }
4029
4030                         if ($10.key != NULL)
4031                                 memcpy(&r.rpool.key, $10.key,
4032                                     sizeof(struct pf_poolhashkey));
4033
4034                          if ($10.opts)
4035                                 r.rpool.opts |= $10.opts;
4036
4037                         if ($10.staticport) {
4038                                 if (r.action != PF_NAT) {
4039                                         yyerror("the 'static-port' option is "
4040                                             "only valid with nat rules");
4041                                         YYERROR;
4042                                 }
4043                                 if (r.rpool.proxy_port[0] !=
4044                                     PF_NAT_PROXY_PORT_LOW &&
4045                                     r.rpool.proxy_port[1] !=
4046                                     PF_NAT_PROXY_PORT_HIGH) {
4047                                         yyerror("the 'static-port' option can't"
4048                                             " be used when specifying a port"
4049                                             " range");
4050                                         YYERROR;
4051                                 }
4052                                 r.rpool.proxy_port[0] = 0;
4053                                 r.rpool.proxy_port[1] = 0;
4054                         }
4055
4056                         expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
4057                             $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
4058                             $5.dst.port, 0, 0, 0, "");
4059                         free($9);
4060                 }
4061                 ;
4062
4063 binatrule       : no BINAT natpasslog interface af proto FROM host toipspec tag
4064                     tagged rtable redirection
4065                 {
4066                         struct pf_rule          binat;
4067                         struct pf_pooladdr      *pa;
4068
4069                         if (check_rulestate(PFCTL_STATE_NAT))
4070                                 YYERROR;
4071                         if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
4072                             "permitted as a binat destination"))
4073                                 YYERROR;
4074
4075                         memset(&binat, 0, sizeof(binat));
4076
4077                         if ($1 && $3.b1) {
4078                                 yyerror("\"pass\" not valid with \"no\"");
4079                                 YYERROR;
4080                         }
4081                         if ($1)
4082                                 binat.action = PF_NOBINAT;
4083                         else
4084                                 binat.action = PF_BINAT;
4085                         binat.natpass = $3.b1;
4086                         binat.log = $3.b2;
4087                         binat.logif = $3.w2;
4088                         binat.af = $5;
4089                         if (!binat.af && $8 != NULL && $8->af)
4090                                 binat.af = $8->af;
4091                         if (!binat.af && $9 != NULL && $9->af)
4092                                 binat.af = $9->af;
4093
4094                         if (!binat.af && $13 != NULL && $13->host)
4095                                 binat.af = $13->host->af;
4096                         if (!binat.af) {
4097                                 yyerror("address family (inet/inet6) "
4098                                     "undefined");
4099                                 YYERROR;
4100                         }
4101
4102                         if ($4 != NULL) {
4103                                 memcpy(binat.ifname, $4->ifname,
4104                                     sizeof(binat.ifname));
4105                                 binat.ifnot = $4->not;
4106                                 free($4);
4107                         }
4108
4109                         if ($10 != NULL)
4110                                 if (strlcpy(binat.tagname, $10,
4111                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4112                                         yyerror("tag too long, max %u chars",
4113                                             PF_TAG_NAME_SIZE - 1);
4114                                         YYERROR;
4115                                 }
4116                         if ($11.name)
4117                                 if (strlcpy(binat.match_tagname, $11.name,
4118                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4119                                         yyerror("tag too long, max %u chars",
4120                                             PF_TAG_NAME_SIZE - 1);
4121                                         YYERROR;
4122                                 }
4123                         binat.match_tag_not = $11.neg;
4124                         binat.rtableid = $12;
4125
4126                         if ($6 != NULL) {
4127                                 binat.proto = $6->proto;
4128                                 free($6);
4129                         }
4130
4131                         if ($8 != NULL && disallow_table($8, "invalid use of "
4132                             "table <%s> as the source address of a binat rule"))
4133                                 YYERROR;
4134                         if ($8 != NULL && disallow_alias($8, "invalid use of "
4135                             "interface (%s) as the source address of a binat "
4136                             "rule"))
4137                                 YYERROR;
4138                         if ($13 != NULL && $13->host != NULL && disallow_table(
4139                             $13->host, "invalid use of table <%s> as the "
4140                             "redirect address of a binat rule"))
4141                                 YYERROR;
4142                         if ($13 != NULL && $13->host != NULL && disallow_alias(
4143                             $13->host, "invalid use of interface (%s) as the "
4144                             "redirect address of a binat rule"))
4145                                 YYERROR;
4146
4147                         if ($8 != NULL) {
4148                                 if ($8->next) {
4149                                         yyerror("multiple binat ip addresses");
4150                                         YYERROR;
4151                                 }
4152                                 if ($8->addr.type == PF_ADDR_DYNIFTL)
4153                                         $8->af = binat.af;
4154                                 if ($8->af != binat.af) {
4155                                         yyerror("binat ip versions must match");
4156                                         YYERROR;
4157                                 }
4158                                 if (check_netmask($8, binat.af))
4159                                         YYERROR;
4160                                 memcpy(&binat.src.addr, &$8->addr,
4161                                     sizeof(binat.src.addr));
4162                                 free($8);
4163                         }
4164                         if ($9 != NULL) {
4165                                 if ($9->next) {
4166                                         yyerror("multiple binat ip addresses");
4167                                         YYERROR;
4168                                 }
4169                                 if ($9->af != binat.af && $9->af) {
4170                                         yyerror("binat ip versions must match");
4171                                         YYERROR;
4172                                 }
4173                                 if (check_netmask($9, binat.af))
4174                                         YYERROR;
4175                                 memcpy(&binat.dst.addr, &$9->addr,
4176                                     sizeof(binat.dst.addr));
4177                                 binat.dst.neg = $9->not;
4178                                 free($9);
4179                         }
4180
4181                         if (binat.action == PF_NOBINAT) {
4182                                 if ($13 != NULL) {
4183                                         yyerror("'no binat' rule does not need"
4184                                             " '->'");
4185                                         YYERROR;
4186                                 }
4187                         } else {
4188                                 if ($13 == NULL || $13->host == NULL) {
4189                                         yyerror("'binat' rule requires"
4190                                             " '-> address'");
4191                                         YYERROR;
4192                                 }
4193
4194                                 remove_invalid_hosts(&$13->host, &binat.af);
4195                                 if (invalid_redirect($13->host, binat.af))
4196                                         YYERROR;
4197                                 if ($13->host->next != NULL) {
4198                                         yyerror("binat rule must redirect to "
4199                                             "a single address");
4200                                         YYERROR;
4201                                 }
4202                                 if (check_netmask($13->host, binat.af))
4203                                         YYERROR;
4204
4205                                 if (!PF_AZERO(&binat.src.addr.v.a.mask,
4206                                     binat.af) &&
4207                                     !PF_AEQ(&binat.src.addr.v.a.mask,
4208                                     &$13->host->addr.v.a.mask, binat.af)) {
4209                                         yyerror("'binat' source mask and "
4210                                             "redirect mask must be the same");
4211                                         YYERROR;
4212                                 }
4213
4214                                 TAILQ_INIT(&binat.rpool.list);
4215                                 pa = calloc(1, sizeof(struct pf_pooladdr));
4216                                 if (pa == NULL)
4217                                         err(1, "binat: calloc");
4218                                 pa->addr = $13->host->addr;
4219                                 pa->ifname[0] = 0;
4220                                 TAILQ_INSERT_TAIL(&binat.rpool.list,
4221                                     pa, entries);
4222
4223                                 free($13);
4224                         }
4225
4226                         pfctl_add_rule(pf, &binat, "");
4227                 }
4228                 ;
4229
4230 tag             : /* empty */           { $$ = NULL; }
4231                 | TAG STRING            { $$ = $2; }
4232                 ;
4233
4234 tagged          : /* empty */           { $$.neg = 0; $$.name = NULL; }
4235                 | not TAGGED string     { $$.neg = $1; $$.name = $3; }
4236                 ;
4237
4238 rtable          : /* empty */           { $$ = -1; }
4239                 | RTABLE NUMBER         {
4240                         $$ = $2;
4241                 }
4242                 ;
4243
4244 route_host      : STRING                        {
4245                         $$ = calloc(1, sizeof(struct node_host));
4246                         if ($$ == NULL)
4247                                 err(1, "route_host: calloc");
4248                         $$->ifname = $1;
4249                         set_ipmask($$, 128);
4250                         $$->next = NULL;
4251                         $$->tail = $$;
4252                 }
4253                 | '(' STRING host ')'           {
4254                         $$ = $3;
4255                         $$->ifname = $2;
4256                 }
4257                 ;
4258
4259 route_host_list : route_host optnl                      { $$ = $1; }
4260                 | route_host_list comma route_host optnl {
4261                         if ($1->af == 0)
4262                                 $1->af = $3->af;
4263                         if ($1->af != $3->af) {
4264                                 yyerror("all pool addresses must be in the "
4265                                     "same address family");
4266                                 YYERROR;
4267                         }
4268                         $1->tail->next = $3;
4269                         $1->tail = $3->tail;
4270                         $$ = $1;
4271                 }
4272                 ;
4273
4274 routespec       : route_host                    { $$ = $1; }
4275                 | '{' optnl route_host_list '}' { $$ = $3; }
4276                 ;
4277
4278 route           : /* empty */                   {
4279                         $$.host = NULL;
4280                         $$.rt = 0;
4281                         $$.pool_opts = 0;
4282                 }
4283                 | FASTROUTE {
4284                         $$.host = NULL;
4285                         $$.rt = PF_FASTROUTE;
4286                         $$.pool_opts = 0;
4287                 }
4288                 | ROUTETO routespec pool_opts {
4289                         $$.host = $2;
4290                         $$.rt = PF_ROUTETO;
4291                         $$.pool_opts = $3.type | $3.opts;
4292                         if ($3.key != NULL)
4293                                 $$.key = $3.key;
4294                 }
4295                 | REPLYTO routespec pool_opts {
4296                         $$.host = $2;
4297                         $$.rt = PF_REPLYTO;
4298                         $$.pool_opts = $3.type | $3.opts;
4299                         if ($3.key != NULL)
4300                                 $$.key = $3.key;
4301                 }
4302                 | DUPTO routespec pool_opts {
4303                         $$.host = $2;
4304                         $$.rt = PF_DUPTO;
4305                         $$.pool_opts = $3.type | $3.opts;
4306                         if ($3.key != NULL)
4307                                 $$.key = $3.key;
4308                 }
4309                 ;
4310
4311 timeout_spec    : STRING NUMBER
4312                 {
4313                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4314                                 free($1);
4315                                 YYERROR;
4316                         }
4317                         if ($2 < 0 || $2 > UINT_MAX) {
4318                                 yyerror("only positive values permitted");
4319                                 YYERROR;
4320                         }
4321                         if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
4322                                 yyerror("unknown timeout %s", $1);
4323                                 free($1);
4324                                 YYERROR;
4325                         }
4326                         free($1);
4327                 }
4328                 ;
4329
4330 timeout_list    : timeout_list comma timeout_spec optnl
4331                 | timeout_spec optnl
4332                 ;
4333
4334 limit_spec      : STRING NUMBER
4335                 {
4336                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4337                                 free($1);
4338                                 YYERROR;
4339                         }
4340                         if ($2 < 0 || $2 > UINT_MAX) {
4341                                 yyerror("only positive values permitted");
4342                                 YYERROR;
4343                         }
4344                         if (pfctl_set_limit(pf, $1, $2) != 0) {
4345                                 yyerror("unable to set limit %s %" PRId64, $1, $2);
4346                                 free($1);
4347                                 YYERROR;
4348                         }
4349                         free($1);
4350                 }
4351                 ;
4352
4353 limit_list      : limit_list comma limit_spec optnl
4354                 | limit_spec optnl
4355                 ;
4356
4357 comma           : ','
4358                 | /* empty */
4359                 ;
4360
4361 yesno           : NO                    { $$ = 0; }
4362                 | STRING                {
4363                         if (!strcmp($1, "yes"))
4364                                 $$ = 1;
4365                         else {
4366                                 yyerror("invalid value '%s', expected 'yes' "
4367                                     "or 'no'", $1);
4368                                 free($1);
4369                                 YYERROR;
4370                         }
4371                         free($1);
4372                 }
4373                 ;
4374
4375 unaryop         : '='           { $$ = PF_OP_EQ; }
4376                 | '!' '='       { $$ = PF_OP_NE; }
4377                 | '<' '='       { $$ = PF_OP_LE; }
4378                 | '<'           { $$ = PF_OP_LT; }
4379                 | '>' '='       { $$ = PF_OP_GE; }
4380                 | '>'           { $$ = PF_OP_GT; }
4381                 ;
4382
4383 %%
4384
4385 int
4386 yyerror(const char *fmt, ...)
4387 {
4388         va_list          ap;
4389
4390         file->errors++;
4391         va_start(ap, fmt);
4392         fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4393         vfprintf(stderr, fmt, ap);
4394         fprintf(stderr, "\n");
4395         va_end(ap);
4396         return (0);
4397 }
4398
4399 int
4400 disallow_table(struct node_host *h, const char *fmt)
4401 {
4402         for (; h != NULL; h = h->next)
4403                 if (h->addr.type == PF_ADDR_TABLE) {
4404                         yyerror(fmt, h->addr.v.tblname);
4405                         return (1);
4406                 }
4407         return (0);
4408 }
4409
4410 int
4411 disallow_urpf_failed(struct node_host *h, const char *fmt)
4412 {
4413         for (; h != NULL; h = h->next)
4414                 if (h->addr.type == PF_ADDR_URPFFAILED) {
4415                         yyerror(fmt);
4416                         return (1);
4417                 }
4418         return (0);
4419 }
4420
4421 int
4422 disallow_alias(struct node_host *h, const char *fmt)
4423 {
4424         for (; h != NULL; h = h->next)
4425                 if (DYNIF_MULTIADDR(h->addr)) {
4426                         yyerror(fmt, h->addr.v.tblname);
4427                         return (1);
4428                 }
4429         return (0);
4430 }
4431
4432 int
4433 rule_consistent(struct pf_rule *r, int anchor_call __unused)
4434 {
4435         int     problems = 0;
4436
4437         switch (r->action) {
4438         case PF_PASS:
4439         case PF_DROP:
4440         case PF_SCRUB:
4441         case PF_NOSCRUB:
4442                 problems = filter_consistent(r, anchor_call);
4443                 break;
4444         case PF_NAT:
4445         case PF_NONAT:
4446                 problems = nat_consistent(r);
4447                 break;
4448         case PF_RDR:
4449         case PF_NORDR:
4450                 problems = rdr_consistent(r);
4451                 break;
4452         case PF_BINAT:
4453         case PF_NOBINAT:
4454         default:
4455                 break;
4456         }
4457         return (problems);
4458 }
4459
4460 int
4461 filter_consistent(struct pf_rule *r, int anchor_call __unused)
4462 {
4463         int     problems = 0;
4464
4465         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4466             (r->src.port_op || r->dst.port_op)) {
4467                 yyerror("port only applies to tcp/udp");
4468                 problems++;
4469         }
4470         if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4471             (r->type || r->code)) {
4472                 yyerror("icmp-type/code only applies to icmp");
4473                 problems++;
4474         }
4475         if (!r->af && (r->type || r->code)) {
4476                 yyerror("must indicate address family with icmp-type/code");
4477                 problems++;
4478         }
4479         if (r->overload_tblname[0] &&
4480             r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4481                 yyerror("'overload' requires 'max-src-conn' "
4482                     "or 'max-src-conn-rate'");
4483                 problems++;
4484         }
4485         if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4486             (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4487                 yyerror("proto %s doesn't match address family %s",
4488                     r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4489                     r->af == AF_INET ? "inet" : "inet6");
4490                 problems++;
4491         }
4492         if (r->allow_opts && r->action != PF_PASS) {
4493                 yyerror("allow-opts can only be specified for pass rules");
4494                 problems++;
4495         }
4496         if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4497             r->dst.port_op || r->flagset || r->type || r->code)) {
4498                 yyerror("fragments can be filtered only on IP header fields");
4499                 problems++;
4500         }
4501         if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4502                 yyerror("return-rst can only be applied to TCP rules");
4503                 problems++;
4504         }
4505         if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4506                 yyerror("max-src-nodes requires 'source-track rule'");
4507                 problems++;
4508         }
4509         if (r->action == PF_DROP && r->keep_state) {
4510                 yyerror("keep state on block rules doesn't make sense");
4511                 problems++;
4512         }
4513         if (r->rule_flag & PFRULE_STATESLOPPY &&
4514             (r->keep_state == PF_STATE_MODULATE ||
4515             r->keep_state == PF_STATE_SYNPROXY)) {
4516                 yyerror("sloppy state matching cannot be used with "
4517                     "synproxy state or modulate state");
4518                 problems++;
4519         }
4520         return (-problems);
4521 }
4522
4523 int
4524 nat_consistent(struct pf_rule *r __unused)
4525 {
4526         return (0);     /* yeah! */
4527 }
4528
4529 int
4530 rdr_consistent(struct pf_rule *r)
4531 {
4532         int                      problems = 0;
4533
4534         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
4535                 if (r->src.port_op) {
4536                         yyerror("src port only applies to tcp/udp");
4537                         problems++;
4538                 }
4539                 if (r->dst.port_op) {
4540                         yyerror("dst port only applies to tcp/udp");
4541                         problems++;
4542                 }
4543                 if (r->rpool.proxy_port[0]) {
4544                         yyerror("rpool port only applies to tcp/udp");
4545                         problems++;
4546                 }
4547         }
4548         if (r->dst.port_op &&
4549             r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
4550                 yyerror("invalid port operator for rdr destination port");
4551                 problems++;
4552         }
4553         return (-problems);
4554 }
4555
4556 int
4557 process_tabledef(char *name, struct table_opts *opts)
4558 {
4559         struct pfr_buffer        ab;
4560         struct node_tinit       *ti;
4561
4562         bzero(&ab, sizeof(ab));
4563         ab.pfrb_type = PFRB_ADDRS;
4564         SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4565                 if (ti->file)
4566                         if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
4567                                 if (errno)
4568                                         yyerror("cannot load \"%s\": %s",
4569                                             ti->file, strerror(errno));
4570                                 else
4571                                         yyerror("file \"%s\" contains bad data",
4572                                             ti->file);
4573                                 goto _error;
4574                         }
4575                 if (ti->host)
4576                         if (append_addr_host(&ab, ti->host, 0, 0)) {
4577                                 yyerror("cannot create address buffer: %s",
4578                                     strerror(errno));
4579                                 goto _error;
4580                         }
4581         }
4582         if (pf->opts & PF_OPT_VERBOSE)
4583                 print_tabledef(name, opts->flags, opts->init_addr,
4584                     &opts->init_nodes);
4585         if (!(pf->opts & PF_OPT_NOACTION) &&
4586             pfctl_define_table(name, opts->flags, opts->init_addr,
4587             pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4588                 yyerror("cannot define table %s: %s", name,
4589                     pfr_strerror(errno));
4590                 goto _error;
4591         }
4592         pf->tdirty = 1;
4593         pfr_buf_clear(&ab);
4594         return (0);
4595 _error:
4596         pfr_buf_clear(&ab);
4597         return (-1);
4598 }
4599
4600 struct keywords {
4601         const char      *k_name;
4602         int              k_val;
4603 };
4604
4605 /* macro gore, but you should've seen the prior indentation nightmare... */
4606
4607 #define FREE_LIST(T,r) \
4608         do { \
4609                 T *p, *node = r; \
4610                 while (node != NULL) { \
4611                         p = node; \
4612                         node = node->next; \
4613                         free(p); \
4614                 } \
4615         } while (0)
4616
4617 #define LOOP_THROUGH(T,n,r,C) \
4618         do { \
4619                 T *n; \
4620                 if (r == NULL) { \
4621                         r = calloc(1, sizeof(T)); \
4622                         if (r == NULL) \
4623                                 err(1, "LOOP: calloc"); \
4624                         r->next = NULL; \
4625                 } \
4626                 n = r; \
4627                 while (n != NULL) { \
4628                         do { \
4629                                 C; \
4630                         } while (0); \
4631                         n = n->next; \
4632                 } \
4633         } while (0)
4634
4635 void
4636 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4637 {
4638         char *tmp;
4639         char *p, *q;
4640
4641         if ((tmp = calloc(1, len)) == NULL)
4642                 err(1, "expand_label_str: calloc");
4643         p = q = label;
4644         while ((q = strstr(p, srch)) != NULL) {
4645                 *q = '\0';
4646                 if ((strlcat(tmp, p, len) >= len) ||
4647                     (strlcat(tmp, repl, len) >= len))
4648                         errx(1, "expand_label: label too long");
4649                 q += strlen(srch);
4650                 p = q;
4651         }
4652         if (strlcat(tmp, p, len) >= len)
4653                 errx(1, "expand_label: label too long");
4654         strlcpy(label, tmp, len);       /* always fits */
4655         free(tmp);
4656 }
4657
4658 void
4659 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4660 {
4661         if (strstr(label, name) != NULL) {
4662                 if (!*ifname)
4663                         expand_label_str(label, len, name, "any");
4664                 else
4665                         expand_label_str(label, len, name, ifname);
4666         }
4667 }
4668
4669 void
4670 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
4671     struct node_host *h)
4672 {
4673         char tmp[64], tmp_not[66];
4674
4675         if (strstr(label, name) != NULL) {
4676                 switch (h->addr.type) {
4677                 case PF_ADDR_DYNIFTL:
4678                         snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
4679                         break;
4680                 case PF_ADDR_TABLE:
4681                         snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
4682                         break;
4683                 case PF_ADDR_NOROUTE:
4684                         snprintf(tmp, sizeof(tmp), "no-route");
4685                         break;
4686                 case PF_ADDR_URPFFAILED:
4687                         snprintf(tmp, sizeof(tmp), "urpf-failed");
4688                         break;
4689                 case PF_ADDR_ADDRMASK:
4690                         if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
4691                             PF_AZERO(&h->addr.v.a.mask, af)))
4692                                 snprintf(tmp, sizeof(tmp), "any");
4693                         else {
4694                                 char    a[48];
4695                                 int     bits;
4696
4697                                 if (inet_ntop(af, &h->addr.v.a.addr, a,
4698                                     sizeof(a)) == NULL)
4699                                         snprintf(tmp, sizeof(tmp), "?");
4700                                 else {
4701                                         bits = unmask(&h->addr.v.a.mask, af);
4702                                         if ((af == AF_INET && bits < 32) ||
4703                                             (af == AF_INET6 && bits < 128))
4704                                                 snprintf(tmp, sizeof(tmp),
4705                                                     "%s/%d", a, bits);
4706                                         else
4707                                                 snprintf(tmp, sizeof(tmp),
4708                                                     "%s", a);
4709                                 }
4710                         }
4711                         break;
4712                 default:
4713                         snprintf(tmp, sizeof(tmp), "?");
4714                         break;
4715                 }
4716
4717                 if (h->not) {
4718                         snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
4719                         expand_label_str(label, len, name, tmp_not);
4720                 } else
4721                         expand_label_str(label, len, name, tmp);
4722         }
4723 }
4724
4725 void
4726 expand_label_port(const char *name, char *label, size_t len,
4727     struct node_port *port)
4728 {
4729         char     a1[6], a2[6], op[13] = "";
4730
4731         if (strstr(label, name) != NULL) {
4732                 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
4733                 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
4734                 if (!port->op)
4735                         ;
4736                 else if (port->op == PF_OP_IRG)
4737                         snprintf(op, sizeof(op), "%s><%s", a1, a2);
4738                 else if (port->op == PF_OP_XRG)
4739                         snprintf(op, sizeof(op), "%s<>%s", a1, a2);
4740                 else if (port->op == PF_OP_EQ)
4741                         snprintf(op, sizeof(op), "%s", a1);
4742                 else if (port->op == PF_OP_NE)
4743                         snprintf(op, sizeof(op), "!=%s", a1);
4744                 else if (port->op == PF_OP_LT)
4745                         snprintf(op, sizeof(op), "<%s", a1);
4746                 else if (port->op == PF_OP_LE)
4747                         snprintf(op, sizeof(op), "<=%s", a1);
4748                 else if (port->op == PF_OP_GT)
4749                         snprintf(op, sizeof(op), ">%s", a1);
4750                 else if (port->op == PF_OP_GE)
4751                         snprintf(op, sizeof(op), ">=%s", a1);
4752                 expand_label_str(label, len, name, op);
4753         }
4754 }
4755
4756 void
4757 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
4758 {
4759         struct protoent *pe;
4760         char n[4];
4761
4762         if (strstr(label, name) != NULL) {
4763                 pe = getprotobynumber(proto);
4764                 if (pe != NULL)
4765                         expand_label_str(label, len, name, pe->p_name);
4766                 else {
4767                         snprintf(n, sizeof(n), "%u", proto);
4768                         expand_label_str(label, len, name, n);
4769                 }
4770         }
4771 }
4772
4773 void
4774 expand_label_nr(const char *name, char *label, size_t len)
4775 {
4776         char n[11];
4777
4778         if (strstr(label, name) != NULL) {
4779                 snprintf(n, sizeof(n), "%u", pf->anchor->match);
4780                 expand_label_str(label, len, name, n);
4781         }
4782 }
4783
4784 void
4785 expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
4786     struct node_host *src_host, struct node_port *src_port,
4787     struct node_host *dst_host, struct node_port *dst_port,
4788     u_int8_t proto)
4789 {
4790         expand_label_if("$if", label, len, ifname);
4791         expand_label_addr("$srcaddr", label, len, af, src_host);
4792         expand_label_addr("$dstaddr", label, len, af, dst_host);
4793         expand_label_port("$srcport", label, len, src_port);
4794         expand_label_port("$dstport", label, len, dst_port);
4795         expand_label_proto("$proto", label, len, proto);
4796         expand_label_nr("$nr", label, len);
4797 }
4798
4799 int
4800 expand_altq(struct pf_altq *a, struct node_if *interfaces,
4801     struct node_queue *nqueues, struct node_queue_bw bwspec,
4802     struct node_queue_opt *opts)
4803 {
4804         struct pf_altq           pa, pb;
4805         char                     qname[PF_QNAME_SIZE];
4806         struct node_queue       *n;
4807         struct node_queue_bw     bw;
4808         int                      errs = 0;
4809
4810         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4811                 FREE_LIST(struct node_if, interfaces);
4812                 FREE_LIST(struct node_queue, nqueues);
4813                 return (0);
4814         }
4815
4816         LOOP_THROUGH(struct node_if, interface, interfaces,
4817                 memcpy(&pa, a, sizeof(struct pf_altq));
4818                 if (strlcpy(pa.ifname, interface->ifname,
4819                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4820                         errx(1, "expand_altq: strlcpy");
4821
4822                 if (interface->not) {
4823                         yyerror("altq on ! <interface> is not supported");
4824                         errs++;
4825                 } else {
4826                         if (eval_pfaltq(pf, &pa, &bwspec, opts))
4827                                 errs++;
4828                         else
4829                                 if (pfctl_add_altq(pf, &pa))
4830                                         errs++;
4831
4832                         if (pf->opts & PF_OPT_VERBOSE) {
4833                                 print_altq(&pf->paltq->altq, 0,
4834                                     &bwspec, opts);
4835                                 if (nqueues && nqueues->tail) {
4836                                         printf("queue { ");
4837                                         LOOP_THROUGH(struct node_queue, queue,
4838                                             nqueues,
4839                                                 printf("%s ",
4840                                                     queue->queue);
4841                                         );
4842                                         printf("}");
4843                                 }
4844                                 printf("\n");
4845                         }
4846
4847                         if (pa.scheduler == ALTQT_CBQ ||
4848                             pa.scheduler == ALTQT_HFSC) {
4849                                 /* now create a root queue */
4850                                 memset(&pb, 0, sizeof(struct pf_altq));
4851                                 if (strlcpy(qname, "root_", sizeof(qname)) >=
4852                                     sizeof(qname))
4853                                         errx(1, "expand_altq: strlcpy");
4854                                 if (strlcat(qname, interface->ifname,
4855                                     sizeof(qname)) >= sizeof(qname))
4856                                         errx(1, "expand_altq: strlcat");
4857                                 if (strlcpy(pb.qname, qname,
4858                                     sizeof(pb.qname)) >= sizeof(pb.qname))
4859                                         errx(1, "expand_altq: strlcpy");
4860                                 if (strlcpy(pb.ifname, interface->ifname,
4861                                     sizeof(pb.ifname)) >= sizeof(pb.ifname))
4862                                         errx(1, "expand_altq: strlcpy");
4863                                 pb.qlimit = pa.qlimit;
4864                                 pb.scheduler = pa.scheduler;
4865                                 bw.bw_absolute = pa.ifbandwidth;
4866                                 bw.bw_percent = 0;
4867                                 if (eval_pfqueue(pf, &pb, &bw, opts))
4868                                         errs++;
4869                                 else
4870                                         if (pfctl_add_altq(pf, &pb))
4871                                                 errs++;
4872                         }
4873
4874                         LOOP_THROUGH(struct node_queue, queue, nqueues,
4875                                 n = calloc(1, sizeof(struct node_queue));
4876                                 if (n == NULL)
4877                                         err(1, "expand_altq: calloc");
4878                                 if (pa.scheduler == ALTQT_CBQ ||
4879                                     pa.scheduler == ALTQT_HFSC /*||
4880                                     pa.scheduler == ALTQT_FAIRQ*/)
4881                                         if (strlcpy(n->parent, qname,
4882                                             sizeof(n->parent)) >=
4883                                             sizeof(n->parent))
4884                                                 errx(1, "expand_altq: strlcpy");
4885                                 if (strlcpy(n->queue, queue->queue,
4886                                     sizeof(n->queue)) >= sizeof(n->queue))
4887                                         errx(1, "expand_altq: strlcpy");
4888                                 if (strlcpy(n->ifname, interface->ifname,
4889                                     sizeof(n->ifname)) >= sizeof(n->ifname))
4890                                         errx(1, "expand_altq: strlcpy");
4891                                 n->scheduler = pa.scheduler;
4892                                 n->next = NULL;
4893                                 n->tail = n;
4894                                 if (queues == NULL)
4895                                         queues = n;
4896                                 else {
4897                                         queues->tail->next = n;
4898                                         queues->tail = n;
4899                                 }
4900                         );
4901                 }
4902         );
4903         FREE_LIST(struct node_if, interfaces);
4904         FREE_LIST(struct node_queue, nqueues);
4905
4906         return (errs);
4907 }
4908
4909 int
4910 expand_queue(struct pf_altq *a, struct node_if *interfaces,
4911     struct node_queue *nqueues, struct node_queue_bw bwspec,
4912     struct node_queue_opt *opts)
4913 {
4914         struct node_queue       *n, *nq;
4915         struct pf_altq           pa;
4916         u_int8_t                 found = 0;
4917         u_int8_t                 errs = 0;
4918
4919         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4920                 FREE_LIST(struct node_queue, nqueues);
4921                 return (0);
4922         }
4923
4924         if (queues == NULL) {
4925                 yyerror("queue %s has no parent", a->qname);
4926                 FREE_LIST(struct node_queue, nqueues);
4927                 return (1);
4928         }
4929
4930         LOOP_THROUGH(struct node_if, interface, interfaces,
4931                 LOOP_THROUGH(struct node_queue, tqueue, queues,
4932                         if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
4933                             (interface->ifname[0] == 0 ||
4934                             (!interface->not && !strncmp(interface->ifname,
4935                             tqueue->ifname, IFNAMSIZ)) ||
4936                             (interface->not && strncmp(interface->ifname,
4937                             tqueue->ifname, IFNAMSIZ)))) {
4938                                 /* found ourself in queues */
4939                                 found++;
4940
4941                                 memcpy(&pa, a, sizeof(struct pf_altq));
4942
4943                                 if (pa.scheduler != ALTQT_NONE &&
4944                                     pa.scheduler != tqueue->scheduler) {
4945                                         yyerror("exactly one scheduler type "
4946                                             "per interface allowed");
4947                                         return (1);
4948                                 }
4949                                 pa.scheduler = tqueue->scheduler;
4950
4951                                 /* scheduler dependent error checking */
4952                                 switch (pa.scheduler) {
4953                                 case ALTQT_PRIQ:
4954                                         if (nqueues != NULL) {
4955                                                 yyerror("priq queues cannot "
4956                                                     "have child queues");
4957                                                 return (1);
4958                                         }
4959                                         if (bwspec.bw_absolute > 0 ||
4960                                             bwspec.bw_percent < 100) {
4961                                                 yyerror("priq doesn't take "
4962                                                     "bandwidth");
4963                                                 return (1);
4964                                         }
4965                                         break;
4966                                 default:
4967                                         break;
4968                                 }
4969
4970                                 if (strlcpy(pa.ifname, tqueue->ifname,
4971                                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4972                                         errx(1, "expand_queue: strlcpy");
4973                                 if (strlcpy(pa.parent, tqueue->parent,
4974                                     sizeof(pa.parent)) >= sizeof(pa.parent))
4975                                         errx(1, "expand_queue: strlcpy");
4976
4977                                 if (eval_pfqueue(pf, &pa, &bwspec, opts))
4978                                         errs++;
4979                                 else
4980                                         if (pfctl_add_altq(pf, &pa))
4981                                                 errs++;
4982
4983                                 for (nq = nqueues; nq != NULL; nq = nq->next) {
4984                                         if (!strcmp(a->qname, nq->queue)) {
4985                                                 yyerror("queue cannot have "
4986                                                     "itself as child");
4987                                                 errs++;
4988                                                 continue;
4989                                         }
4990                                         n = calloc(1,
4991                                             sizeof(struct node_queue));
4992                                         if (n == NULL)
4993                                                 err(1, "expand_queue: calloc");
4994                                         if (strlcpy(n->parent, a->qname,
4995                                             sizeof(n->parent)) >=
4996                                             sizeof(n->parent))
4997                                                 errx(1, "expand_queue strlcpy");
4998                                         if (strlcpy(n->queue, nq->queue,
4999                                             sizeof(n->queue)) >=
5000                                             sizeof(n->queue))
5001                                                 errx(1, "expand_queue strlcpy");
5002                                         if (strlcpy(n->ifname, tqueue->ifname,
5003                                             sizeof(n->ifname)) >=
5004                                             sizeof(n->ifname))
5005                                                 errx(1, "expand_queue strlcpy");
5006                                         n->scheduler = tqueue->scheduler;
5007                                         n->next = NULL;
5008                                         n->tail = n;
5009                                         if (queues == NULL)
5010                                                 queues = n;
5011                                         else {
5012                                                 queues->tail->next = n;
5013                                                 queues->tail = n;
5014                                         }
5015                                 }
5016                                 if ((pf->opts & PF_OPT_VERBOSE) && (
5017                                     (found == 1 && interface->ifname[0] == 0) ||
5018                                     (found > 0 && interface->ifname[0] != 0))) {
5019                                         print_queue(&pf->paltq->altq, 0,
5020                                             &bwspec, interface->ifname[0] != 0,
5021                                             opts);
5022                                         if (nqueues && nqueues->tail) {
5023                                                 printf("{ ");
5024                                                 LOOP_THROUGH(struct node_queue,
5025                                                     queue, nqueues,
5026                                                         printf("%s ",
5027                                                             queue->queue);
5028                                                 );
5029                                                 printf("}");
5030                                         }
5031                                         printf("\n");
5032                                 }
5033                         }
5034                 );
5035         );
5036
5037         FREE_LIST(struct node_queue, nqueues);
5038         FREE_LIST(struct node_if, interfaces);
5039
5040         if (!found) {
5041                 yyerror("queue %s has no parent", a->qname);
5042                 errs++;
5043         }
5044
5045         if (errs)
5046                 return (1);
5047         else
5048                 return (0);
5049 }
5050
5051 void
5052 expand_rule(struct pf_rule *r,
5053     struct node_if *interfaces, struct node_host *rpool_hosts,
5054     struct node_proto *protos, struct node_os *src_oses,
5055     struct node_host *src_hosts, struct node_port *src_ports,
5056     struct node_host *dst_hosts, struct node_port *dst_ports,
5057     struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types,
5058     const char *anchor_call)
5059 {
5060         sa_family_t              af = r->af;
5061         int                      added = 0, error = 0;
5062         char                     ifname[IF_NAMESIZE];
5063         char                     label[PF_RULE_LABEL_SIZE];
5064         char                     tagname[PF_TAG_NAME_SIZE];
5065         char                     match_tagname[PF_TAG_NAME_SIZE];
5066         struct pf_pooladdr      *pa;
5067         struct node_host        *h;
5068         u_int8_t                 flags, flagset, keep_state;
5069
5070         if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
5071                 errx(1, "expand_rule: strlcpy");
5072         if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
5073                 errx(1, "expand_rule: strlcpy");
5074         if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
5075             sizeof(match_tagname))
5076                 errx(1, "expand_rule: strlcpy");
5077         flags = r->flags;
5078         flagset = r->flagset;
5079         keep_state = r->keep_state;
5080
5081         LOOP_THROUGH(struct node_if, interface, interfaces,
5082         LOOP_THROUGH(struct node_proto, proto, protos,
5083         LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
5084         LOOP_THROUGH(struct node_host, src_host, src_hosts,
5085         LOOP_THROUGH(struct node_port, src_port, src_ports,
5086         LOOP_THROUGH(struct node_os, src_os, src_oses,
5087         LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
5088         LOOP_THROUGH(struct node_port, dst_port, dst_ports,
5089         LOOP_THROUGH(struct node_uid, uid, uids,
5090         LOOP_THROUGH(struct node_gid, gid, gids,
5091
5092                 r->af = af;
5093                 /* for link-local IPv6 address, interface must match up */
5094                 if ((r->af && src_host->af && r->af != src_host->af) ||
5095                     (r->af && dst_host->af && r->af != dst_host->af) ||
5096                     (src_host->af && dst_host->af &&
5097                     src_host->af != dst_host->af) ||
5098                     (src_host->ifindex && dst_host->ifindex &&
5099                     src_host->ifindex != dst_host->ifindex) ||
5100                     (src_host->ifindex && *interface->ifname &&
5101                     src_host->ifindex != if_nametoindex(interface->ifname)) ||
5102                     (dst_host->ifindex && *interface->ifname &&
5103                     dst_host->ifindex != if_nametoindex(interface->ifname)))
5104                         continue;
5105                 if (!r->af && src_host->af)
5106                         r->af = src_host->af;
5107                 else if (!r->af && dst_host->af)
5108                         r->af = dst_host->af;
5109
5110                 if (*interface->ifname)
5111                         strlcpy(r->ifname, interface->ifname,
5112                             sizeof(r->ifname));
5113                 else if (if_indextoname(src_host->ifindex, ifname))
5114                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5115                 else if (if_indextoname(dst_host->ifindex, ifname))
5116                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5117                 else
5118                         memset(r->ifname, '\0', sizeof(r->ifname));
5119
5120                 if (strlcpy(r->label, label, sizeof(r->label)) >=
5121                     sizeof(r->label))
5122                         errx(1, "expand_rule: strlcpy");
5123                 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
5124                     sizeof(r->tagname))
5125                         errx(1, "expand_rule: strlcpy");
5126                 if (strlcpy(r->match_tagname, match_tagname,
5127                     sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
5128                         errx(1, "expand_rule: strlcpy");
5129                 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
5130                     src_host, src_port, dst_host, dst_port, proto->proto);
5131                 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
5132                     src_host, src_port, dst_host, dst_port, proto->proto);
5133                 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
5134                     r->af, src_host, src_port, dst_host, dst_port,
5135                     proto->proto);
5136
5137                 error += check_netmask(src_host, r->af);
5138                 error += check_netmask(dst_host, r->af);
5139
5140                 r->ifnot = interface->not;
5141                 r->proto = proto->proto;
5142                 r->src.addr = src_host->addr;
5143                 r->src.neg = src_host->not;
5144                 r->src.port[0] = src_port->port[0];
5145                 r->src.port[1] = src_port->port[1];
5146                 r->src.port_op = src_port->op;
5147                 r->dst.addr = dst_host->addr;
5148                 r->dst.neg = dst_host->not;
5149                 r->dst.port[0] = dst_port->port[0];
5150                 r->dst.port[1] = dst_port->port[1];
5151                 r->dst.port_op = dst_port->op;
5152                 r->uid.op = uid->op;
5153                 r->uid.uid[0] = uid->uid[0];
5154                 r->uid.uid[1] = uid->uid[1];
5155                 r->gid.op = gid->op;
5156                 r->gid.gid[0] = gid->gid[0];
5157                 r->gid.gid[1] = gid->gid[1];
5158                 r->type = icmp_type->type;
5159                 r->code = icmp_type->code;
5160
5161                 if ((keep_state == PF_STATE_MODULATE ||
5162                     keep_state == PF_STATE_SYNPROXY) &&
5163                     r->proto && r->proto != IPPROTO_TCP)
5164                         r->keep_state = PF_STATE_NORMAL;
5165                 else
5166                         r->keep_state = keep_state;
5167
5168                 if (r->proto && r->proto != IPPROTO_TCP) {
5169                         r->flags = 0;
5170                         r->flagset = 0;
5171                 } else {
5172                         r->flags = flags;
5173                         r->flagset = flagset;
5174                 }
5175                 if (icmp_type->proto && r->proto != icmp_type->proto) {
5176                         yyerror("icmp-type mismatch");
5177                         error++;
5178                 }
5179
5180                 if (src_os && src_os->os) {
5181                         r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5182                         if ((pf->opts & PF_OPT_VERBOSE2) &&
5183                             r->os_fingerprint == PF_OSFP_NOMATCH)
5184                                 fprintf(stderr,
5185                                     "warning: unknown '%s' OS fingerprint\n",
5186                                     src_os->os);
5187                 } else {
5188                         r->os_fingerprint = PF_OSFP_ANY;
5189                 }
5190
5191                 TAILQ_INIT(&r->rpool.list);
5192                 for (h = rpool_hosts; h != NULL; h = h->next) {
5193                         pa = calloc(1, sizeof(struct pf_pooladdr));
5194                         if (pa == NULL)
5195                                 err(1, "expand_rule: calloc");
5196                         pa->addr = h->addr;
5197                         if (h->ifname != NULL) {
5198                                 if (strlcpy(pa->ifname, h->ifname,
5199                                     sizeof(pa->ifname)) >=
5200                                     sizeof(pa->ifname))
5201                                         errx(1, "expand_rule: strlcpy");
5202                         } else
5203                                 pa->ifname[0] = 0;
5204                         TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
5205                 }
5206
5207                 if (rule_consistent(r, anchor_call[0]) < 0 || error)
5208                         yyerror("skipping rule due to errors");
5209                 else {
5210                         r->nr = pf->astack[pf->asd]->match++;
5211                         pfctl_add_rule(pf, r, anchor_call);
5212                         added++;
5213                 }
5214
5215         ))))))))));
5216
5217         FREE_LIST(struct node_if, interfaces);
5218         FREE_LIST(struct node_proto, protos);
5219         FREE_LIST(struct node_host, src_hosts);
5220         FREE_LIST(struct node_port, src_ports);
5221         FREE_LIST(struct node_os, src_oses);
5222         FREE_LIST(struct node_host, dst_hosts);
5223         FREE_LIST(struct node_port, dst_ports);
5224         FREE_LIST(struct node_uid, uids);
5225         FREE_LIST(struct node_gid, gids);
5226         FREE_LIST(struct node_icmp, icmp_types);
5227         FREE_LIST(struct node_host, rpool_hosts);
5228
5229         if (!added)
5230                 yyerror("rule expands to no valid combination");
5231 }
5232
5233 int
5234 expand_skip_interface(struct node_if *interfaces)
5235 {
5236         int     errs = 0;
5237
5238         if (!interfaces || (!interfaces->next && !interfaces->not &&
5239             !strcmp(interfaces->ifname, "none"))) {
5240                 if (pf->opts & PF_OPT_VERBOSE)
5241                         printf("set skip on none\n");
5242                 errs = pfctl_set_interface_flags(pf,  __DECONST(char *, ""), PFI_IFLAG_SKIP, 0);
5243                 return (errs);
5244         }
5245
5246         if (pf->opts & PF_OPT_VERBOSE)
5247                 printf("set skip on {");
5248         LOOP_THROUGH(struct node_if, interface, interfaces,
5249                 if (pf->opts & PF_OPT_VERBOSE)
5250                         printf(" %s", interface->ifname);
5251                 if (interface->not) {
5252                         yyerror("skip on ! <interface> is not supported");
5253                         errs++;
5254                 } else
5255                         errs += pfctl_set_interface_flags(pf,
5256                             interface->ifname, PFI_IFLAG_SKIP, 1);
5257         );
5258         if (pf->opts & PF_OPT_VERBOSE)
5259                 printf(" }\n");
5260
5261         FREE_LIST(struct node_if, interfaces);
5262
5263         if (errs)
5264                 return (1);
5265         else
5266                 return (0);
5267 }
5268
5269 #undef FREE_LIST
5270 #undef LOOP_THROUGH
5271
5272 int
5273 check_rulestate(int desired_state)
5274 {
5275         if (require_order && (rulestate > desired_state)) {
5276                 yyerror("Rules must be in order: options, normalization, "
5277                     "queueing, translation, filtering");
5278                 return (1);
5279         }
5280         rulestate = desired_state;
5281         return (0);
5282 }
5283
5284 int
5285 kw_cmp(const void *k, const void *e)
5286 {
5287         return (strcmp(k, ((const struct keywords *)e)->k_name));
5288 }
5289
5290 int
5291 lookup(char *s)
5292 {
5293         /* this has to be sorted always */
5294         static const struct keywords keywords[] = {
5295                 { "all",                ALL},
5296                 { "allow-opts",         ALLOWOPTS},
5297                 { "altq",               ALTQ},
5298                 { "anchor",             ANCHOR},
5299                 { "antispoof",          ANTISPOOF},
5300                 { "any",                ANY},
5301                 { "bandwidth",          BANDWIDTH},
5302                 { "binat",              BINAT},
5303                 { "binat-anchor",       BINATANCHOR},
5304                 { "bitmask",            BITMASK},
5305                 { "block",              BLOCK},
5306                 { "block-policy",       BLOCKPOLICY},
5307                 { "buckets",            BUCKETS},
5308                 { "cbq",                CBQ},
5309                 { "code",               CODE},
5310                 { "crop",               FRAGCROP},
5311                 { "debug",              DEBUG},
5312                 { "divert-reply",       DIVERTREPLY},
5313                 { "divert-to",          DIVERTTO},
5314                 { "drop",               DROP},
5315                 { "drop-ovl",           FRAGDROP},
5316                 { "dup-to",             DUPTO},
5317                 { "fairq",              FAIRQ},
5318                 { "fastroute",          FASTROUTE},
5319                 { "file",               FILENAME},
5320                 { "fingerprints",       FINGERPRINTS},
5321                 { "flags",              FLAGS},
5322                 { "floating",           FLOATING},
5323                 { "flush",              FLUSH},
5324                 { "for",                FOR},
5325                 { "fragment",           FRAGMENT},
5326                 { "from",               FROM},
5327                 { "global",             GLOBAL},
5328                 { "group",              GROUP},
5329                 { "hash-only",          HASHONLY},
5330                 { "hfsc",               HFSC},
5331                 { "hogs",               HOGS},
5332                 { "hostid",             HOSTID},
5333                 { "icmp-type",          ICMPTYPE},
5334                 { "icmp6-type",         ICMP6TYPE},
5335                 { "if-bound",           IFBOUND},
5336                 { "in",                 IN},
5337                 { "include",            INCLUDE},
5338                 { "inet",               INET},
5339                 { "inet6",              INET6},
5340                 { "keep",               KEEP},
5341                 { "keep-policy",        KEEPPOLICY},
5342                 { "label",              LABEL},
5343                 { "limit",              LIMIT},
5344                 { "linkshare",          LINKSHARE},
5345                 { "load",               LOAD},
5346                 { "log",                LOG},
5347                 { "loginterface",       LOGINTERFACE},
5348                 { "max",                MAXIMUM},
5349                 { "max-mss",            MAXMSS},
5350                 { "max-src-conn",       MAXSRCCONN},
5351                 { "max-src-conn-rate",  MAXSRCCONNRATE},
5352                 { "max-src-nodes",      MAXSRCNODES},
5353                 { "max-src-states",     MAXSRCSTATES},
5354                 { "min-ttl",            MINTTL},
5355                 { "modulate",           MODULATE},
5356                 { "nat",                NAT},
5357                 { "nat-anchor",         NATANCHOR},
5358                 { "no",                 NO},
5359                 { "no-df",              NODF},
5360                 { "no-pickups",         NOPICKUPS},
5361                 { "no-route",           NOROUTE},
5362                 { "no-sync",            NOSYNC},
5363                 { "on",                 ON},
5364                 { "optimization",       OPTIMIZATION},
5365                 { "os",                 OS},
5366                 { "out",                OUT},
5367                 { "overload",           OVERLOAD},
5368                 { "pass",               PASS},
5369                 { "pickups",            PICKUPS},
5370                 { "port",               PORT},
5371                 { "priority",           PRIORITY},
5372                 { "priq",               PRIQ},
5373                 { "probability",        PROBABILITY},
5374                 { "proto",              PROTO},
5375                 { "qlimit",             QLIMIT},
5376                 { "queue",              QUEUE},
5377                 { "quick",              QUICK},
5378                 { "random",             RANDOM},
5379                 { "random-id",          RANDOMID},
5380                 { "rdr",                RDR},
5381                 { "rdr-anchor",         RDRANCHOR},
5382                 { "realtime",           REALTIME},
5383                 { "reassemble",         REASSEMBLE},
5384                 { "reply-to",           REPLYTO},
5385                 { "require-order",      REQUIREORDER},
5386                 { "return",             RETURN},
5387                 { "return-icmp",        RETURNICMP},
5388                 { "return-icmp6",       RETURNICMP6},
5389                 { "return-rst",         RETURNRST},
5390                 { "round-robin",        ROUNDROBIN},
5391                 { "route",              ROUTE},
5392                 { "route-to",           ROUTETO},
5393                 { "rtable",             RTABLE},
5394                 { "rule",               RULE},
5395                 { "ruleset-optimization",       RULESET_OPTIMIZATION},
5396                 { "scrub",              SCRUB},
5397                 { "set",                SET},
5398                 { "set-tos",            SETTOS},
5399                 { "skip",               SKIP},
5400                 { "sloppy",             SLOPPY},
5401                 { "source-hash",        SOURCEHASH},
5402                 { "source-track",       SOURCETRACK},
5403                 { "state",              STATE},
5404                 { "state-policy",       STATEPOLICY},
5405                 { "static-port",        STATICPORT},
5406                 { "sticky-address",     STICKYADDRESS},
5407                 { "synproxy",           SYNPROXY},
5408                 { "table",              TABLE},
5409                 { "tag",                TAG},
5410                 { "tagged",             TAGGED},
5411                 { "tbrsize",            TBRSIZE},
5412                 { "timeout",            TIMEOUT},
5413                 { "to",                 TO},
5414                 { "tos",                TOS},
5415                 { "ttl",                TTL},
5416                 { "upperlimit",         UPPERLIMIT},
5417                 { "urpf-failed",        URPFFAILED},
5418                 { "user",               USER},
5419         };
5420         const struct keywords   *p;
5421
5422         p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5423             sizeof(keywords[0]), kw_cmp);
5424
5425         if (p) {
5426                 if (debug > 1)
5427                         fprintf(stderr, "%s: %d\n", s, p->k_val);
5428                 return (p->k_val);
5429         } else {
5430                 if (debug > 1)
5431                         fprintf(stderr, "string: %s\n", s);
5432                 return (STRING);
5433         }
5434 }
5435
5436 #define MAXPUSHBACK     128
5437
5438 char    *parsebuf;
5439 int      parseindex;
5440 char     pushback_buffer[MAXPUSHBACK];
5441 int      pushback_index = 0;
5442
5443 int
5444 lgetc(int quotec)
5445 {
5446         int             c, next;
5447
5448         if (parsebuf) {
5449                 /* Read character from the parsebuffer instead of input. */
5450                 if (parseindex >= 0) {
5451                         c = parsebuf[parseindex++];
5452                         if (c != '\0')
5453                                 return (c);
5454                         parsebuf = NULL;
5455                 } else
5456                         parseindex++;
5457         }
5458
5459         if (pushback_index)
5460                 return (pushback_buffer[--pushback_index]);
5461
5462         if (quotec) {
5463                 if ((c = getc(file->stream)) == EOF) {
5464                         yyerror("reached end of file while parsing quoted string");
5465                         if (popfile() == EOF)
5466                                 return (EOF);
5467                         return (quotec);
5468                 }
5469                 return (c);
5470         }
5471
5472         while ((c = getc(file->stream)) == '\\') {
5473                 next = getc(file->stream);
5474                 if (next != '\n') {
5475                         c = next;
5476                         break;
5477                 }
5478                 yylval.lineno = file->lineno;
5479                 file->lineno++;
5480         }
5481
5482         while (c == EOF) {
5483                 if (popfile() == EOF)
5484                         return (EOF);
5485                 c = getc(file->stream);
5486         }
5487         return (c);
5488 }
5489
5490 int
5491 lungetc(int c)
5492 {
5493         if (c == EOF)
5494                 return (EOF);
5495         if (parsebuf) {
5496                 parseindex--;
5497                 if (parseindex >= 0)
5498                         return (c);
5499         }
5500         if (pushback_index < MAXPUSHBACK-1)
5501                 return (pushback_buffer[pushback_index++] = c);
5502         else
5503                 return (EOF);
5504 }
5505
5506 int
5507 findeol(void)
5508 {
5509         int     c;
5510
5511         parsebuf = NULL;
5512         pushback_index = 0;
5513
5514         /* skip to either EOF or the first real EOL */
5515         while (1) {
5516                 c = lgetc(0);
5517                 if (c == '\n') {
5518                         file->lineno++;
5519                         break;
5520                 }
5521                 if (c == EOF)
5522                         break;
5523         }
5524         return (ERROR);
5525 }
5526
5527 int
5528 yylex(void)
5529 {
5530         char     buf[8096];
5531         char    *p, *val;
5532         int      quotec, next, c;
5533         int      token;
5534
5535 top:
5536         p = buf;
5537         while ((c = lgetc(0)) == ' ' || c == '\t')
5538                 ; /* nothing */
5539
5540         yylval.lineno = file->lineno;
5541         if (c == '#')
5542                 while ((c = lgetc(0)) != '\n' && c != EOF)
5543                         ; /* nothing */
5544         if (c == '$' && parsebuf == NULL) {
5545                 while (1) {
5546                         if ((c = lgetc(0)) == EOF)
5547                                 return (0);
5548
5549                         if (p + 1 >= buf + sizeof(buf) - 1) {
5550                                 yyerror("string too long");
5551                                 return (findeol());
5552                         }
5553                         if (isalnum(c) || c == '_') {
5554                                 *p++ = (char)c;
5555                                 continue;
5556                         }
5557                         *p = '\0';
5558                         lungetc(c);
5559                         break;
5560                 }
5561                 val = symget(buf);
5562                 if (val == NULL) {
5563                         yyerror("macro '%s' not defined", buf);
5564                         return (findeol());
5565                 }
5566                 parsebuf = val;
5567                 parseindex = 0;
5568                 goto top;
5569         }
5570
5571         switch (c) {
5572         case '\'':
5573         case '"':
5574                 quotec = c;
5575                 while (1) {
5576                         if ((c = lgetc(quotec)) == EOF)
5577                                 return (0);
5578                         if (c == '\n') {
5579                                 file->lineno++;
5580                                 continue;
5581                         } else if (c == '\\') {
5582                                 if ((next = lgetc(quotec)) == EOF)
5583                                         return (0);
5584                                 if (next == quotec || c == ' ' || c == '\t')
5585                                         c = next;
5586                                 else if (next == '\n')
5587                                         continue;
5588                                 else
5589                                         lungetc(next);
5590                         } else if (c == quotec) {
5591                                 *p = '\0';
5592                                 break;
5593                         }
5594                         if (p + 1 >= buf + sizeof(buf) - 1) {
5595                                 yyerror("string too long");
5596                                 return (findeol());
5597                         }
5598                         *p++ = (char)c;
5599                 }
5600                 yylval.v.string = strdup(buf);
5601                 if (yylval.v.string == NULL)
5602                         err(1, "yylex: strdup");
5603                 return (STRING);
5604         case '<':
5605                 next = lgetc(0);
5606                 if (next == '>') {
5607                         yylval.v.i = PF_OP_XRG;
5608                         return (PORTBINARY);
5609                 }
5610                 lungetc(next);
5611                 break;
5612         case '>':
5613                 next = lgetc(0);
5614                 if (next == '<') {
5615                         yylval.v.i = PF_OP_IRG;
5616                         return (PORTBINARY);
5617                 }
5618                 lungetc(next);
5619                 break;
5620         case '-':
5621                 next = lgetc(0);
5622                 if (next == '>')
5623                         return (ARROW);
5624                 lungetc(next);
5625                 break;
5626         }
5627
5628 #define allowed_to_end_number(x) \
5629         (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5630
5631         if (c == '-' || isdigit(c)) {
5632                 do {
5633                         *p++ = c;
5634                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5635                                 yyerror("string too long");
5636                                 return (findeol());
5637                         }
5638                 } while ((c = lgetc(0)) != EOF && isdigit(c));
5639                 lungetc(c);
5640                 if (p == buf + 1 && buf[0] == '-')
5641                         goto nodigits;
5642                 if (c == EOF || allowed_to_end_number(c)) {
5643                         const char *errstr = NULL;
5644
5645                         *p = '\0';
5646                         yylval.v.number = strtonum(buf, LLONG_MIN,
5647                             LLONG_MAX, &errstr);
5648                         if (errstr) {
5649                                 yyerror("\"%s\" invalid number: %s",
5650                                     buf, errstr);
5651                                 return (findeol());
5652                         }
5653                         return (NUMBER);
5654                 } else {
5655 nodigits:
5656                         while (p > buf + 1)
5657                                 lungetc(*--p);
5658                         c = *--p;
5659                         if (c == '-')
5660                                 return (c);
5661                 }
5662         }
5663
5664 #define allowed_in_string(x) \
5665         (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
5666         x != '{' && x != '}' && x != '<' && x != '>' && \
5667         x != '!' && x != '=' && x != '/' && x != '#' && \
5668         x != ','))
5669
5670         if (isalnum(c) || c == ':' || c == '_') {
5671                 do {
5672                         *p++ = c;
5673                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5674                                 yyerror("string too long");
5675                                 return (findeol());
5676                         }
5677                 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
5678                 lungetc(c);
5679                 *p = '\0';
5680                 if ((token = lookup(buf)) == STRING)
5681                         if ((yylval.v.string = strdup(buf)) == NULL)
5682                                 err(1, "yylex: strdup");
5683                 return (token);
5684         }
5685         if (c == '\n') {
5686                 yylval.lineno = file->lineno;
5687                 file->lineno++;
5688         }
5689         if (c == EOF)
5690                 return (0);
5691         return (c);
5692 }
5693
5694 int
5695 check_file_secrecy(int fd, const char *fname)
5696 {
5697         struct stat     st;
5698
5699         if (fstat(fd, &st)) {
5700                 warn("cannot stat %s", fname);
5701                 return (-1);
5702         }
5703         if (st.st_uid != 0 && st.st_uid != getuid()) {
5704                 warnx("%s: owner not root or current user", fname);
5705                 return (-1);
5706         }
5707         if (st.st_mode & (S_IRWXG | S_IRWXO)) {
5708                 warnx("%s: group/world readable/writeable", fname);
5709                 return (-1);
5710         }
5711         return (0);
5712 }
5713
5714 struct file *
5715 pushfile(const char *name, int secret)
5716 {
5717         struct file     *nfile;
5718
5719         if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
5720             (nfile->name = strdup(name)) == NULL) {
5721                 warn("malloc");
5722                 return (NULL);
5723         }
5724         if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
5725                 nfile->stream = stdin;
5726                 free(nfile->name);
5727                 if ((nfile->name = strdup("stdin")) == NULL) {
5728                         warn("strdup");
5729                         free(nfile);
5730                         return (NULL);
5731                 }
5732         } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
5733                 warn("%s", nfile->name);
5734                 free(nfile->name);
5735                 free(nfile);
5736                 return (NULL);
5737         } else if (secret &&
5738             check_file_secrecy(fileno(nfile->stream), nfile->name)) {
5739                 fclose(nfile->stream);
5740                 free(nfile->name);
5741                 free(nfile);
5742                 return (NULL);
5743         }
5744         nfile->lineno = 1;
5745         TAILQ_INSERT_TAIL(&files, nfile, entry);
5746         return (nfile);
5747 }
5748
5749 int
5750 popfile(void)
5751 {
5752         struct file     *prev;
5753
5754         if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
5755                 prev->errors += file->errors;
5756                 TAILQ_REMOVE(&files, file, entry);
5757                 fclose(file->stream);
5758                 free(file->name);
5759                 free(file);
5760                 file = prev;
5761                 return (0);
5762         }
5763         return (EOF);
5764 }
5765
5766 int
5767 parse_config(char *filename, struct pfctl *xpf)
5768 {
5769         int              errors = 0;
5770         struct sym      *sym;
5771
5772         pf = xpf;
5773         errors = 0;
5774         rulestate = PFCTL_STATE_NONE;
5775         returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
5776         returnicmp6default =
5777             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
5778         blockpolicy = PFRULE_DROP;
5779         require_order = 1;
5780
5781         if ((file = pushfile(filename, 0)) == NULL) {
5782                 warn("cannot open the main config file!");
5783                 return (-1);
5784         }
5785
5786         yyparse();
5787         errors = file->errors;
5788         popfile();
5789
5790         /* Free macros and check which have not been used. */
5791         while ((sym = TAILQ_FIRST(&symhead))) {
5792                 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
5793                         fprintf(stderr, "warning: macro '%s' not "
5794                             "used\n", sym->nam);
5795                 free(sym->nam);
5796                 free(sym->val);
5797                 TAILQ_REMOVE(&symhead, sym, entry);
5798                 free(sym);
5799         }
5800
5801         return (errors ? -1 : 0);
5802 }
5803
5804 int
5805 symset(const char *nam, const char *val, int persist)
5806 {
5807         struct sym      *sym;
5808
5809         for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
5810             sym = TAILQ_NEXT(sym, entry))
5811                 ;       /* nothing */
5812
5813         if (sym != NULL) {
5814                 if (sym->persist == 1)
5815                         return (0);
5816                 else {
5817                         free(sym->nam);
5818                         free(sym->val);
5819                         TAILQ_REMOVE(&symhead, sym, entry);
5820                         free(sym);
5821                 }
5822         }
5823         if ((sym = calloc(1, sizeof(*sym))) == NULL)
5824                 return (-1);
5825
5826         sym->nam = strdup(nam);
5827         if (sym->nam == NULL) {
5828                 free(sym);
5829                 return (-1);
5830         }
5831         sym->val = strdup(val);
5832         if (sym->val == NULL) {
5833                 free(sym->nam);
5834                 free(sym);
5835                 return (-1);
5836         }
5837         sym->used = 0;
5838         sym->persist = persist;
5839         TAILQ_INSERT_TAIL(&symhead, sym, entry);
5840         return (0);
5841 }
5842
5843 int
5844 pfctl_cmdline_symset(char *s)
5845 {
5846         char    *sym, *val;
5847         int      ret;
5848
5849         if ((val = strrchr(s, '=')) == NULL)
5850                 return (-1);
5851
5852         if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
5853                 err(1, "pfctl_cmdline_symset: malloc");
5854
5855         strlcpy(sym, s, strlen(s) - strlen(val) + 1);
5856
5857         ret = symset(sym, val + 1, 1);
5858         free(sym);
5859
5860         return (ret);
5861 }
5862
5863 char *
5864 symget(const char *nam)
5865 {
5866         struct sym      *sym;
5867
5868         TAILQ_FOREACH(sym, &symhead, entry)
5869                 if (strcmp(nam, sym->nam) == 0) {
5870                         sym->used = 1;
5871                         return (sym->val);
5872                 }
5873         return (NULL);
5874 }
5875
5876 void
5877 mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst)
5878 {
5879         int i;
5880         struct pf_rule *r;
5881
5882         for (i = 0; i < PF_RULESET_MAX; ++i) {
5883                 while ((r = TAILQ_FIRST(src->rules[i].active.ptr))
5884                     != NULL) {
5885                         TAILQ_REMOVE(src->rules[i].active.ptr, r, entries);
5886                         TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries);
5887                         dst->anchor->match++;
5888                 }
5889                 src->anchor->match = 0;
5890                 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr))
5891                     != NULL) {
5892                         TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries);
5893                         TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr,
5894                                 r, entries);
5895                 }
5896         }
5897 }
5898
5899 void
5900 decide_address_family(struct node_host *n, sa_family_t *af)
5901 {
5902         if (*af != 0 || n == NULL)
5903                 return;
5904         *af = n->af;
5905         while ((n = n->next) != NULL) {
5906                 if (n->af != *af) {
5907                         *af = 0;
5908                         return;
5909                 }
5910         }
5911 }
5912
5913 void
5914 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
5915 {
5916         struct node_host        *n = *nh, *prev = NULL;
5917
5918         while (n != NULL) {
5919                 if (*af && n->af && n->af != *af) {
5920                         /* unlink and free n */
5921                         struct node_host *next = n->next;
5922
5923                         /* adjust tail pointer */
5924                         if (n == (*nh)->tail)
5925                                 (*nh)->tail = prev;
5926                         /* adjust previous node's next pointer */
5927                         if (prev == NULL)
5928                                 *nh = next;
5929                         else
5930                                 prev->next = next;
5931                         /* free node */
5932                         if (n->ifname != NULL)
5933                                 free(n->ifname);
5934                         free(n);
5935                         n = next;
5936                 } else {
5937                         if (n->af && !*af)
5938                                 *af = n->af;
5939                         prev = n;
5940                         n = n->next;
5941                 }
5942         }
5943 }
5944
5945 int
5946 invalid_redirect(struct node_host *nh, sa_family_t af)
5947 {
5948         if (!af) {
5949                 struct node_host *n;
5950
5951                 /* tables and dyniftl are ok without an address family */
5952                 for (n = nh; n != NULL; n = n->next) {
5953                         if (n->addr.type != PF_ADDR_TABLE &&
5954                             n->addr.type != PF_ADDR_DYNIFTL) {
5955                                 yyerror("address family not given and "
5956                                     "translation address expands to multiple "
5957                                     "address families");
5958                                 return (1);
5959                         }
5960                 }
5961         }
5962         if (nh == NULL) {
5963                 yyerror("no translation address with matching address family "
5964                     "found.");
5965                 return (1);
5966         }
5967         return (0);
5968 }
5969
5970 int
5971 atoul(char *s, u_long *ulvalp)
5972 {
5973         u_long   ulval;
5974         char    *ep;
5975
5976         errno = 0;
5977         ulval = strtoul(s, &ep, 0);
5978         if (s[0] == '\0' || *ep != '\0')
5979                 return (-1);
5980         if (errno == ERANGE && ulval == ULONG_MAX)
5981                 return (-1);
5982         *ulvalp = ulval;
5983         return (0);
5984 }
5985
5986 int
5987 getservice(char *n)
5988 {
5989         struct servent  *s;
5990         u_long           ulval;
5991
5992         if (atoul(n, &ulval) == 0) {
5993                 if (ulval > 65535) {
5994                         yyerror("illegal port value %lu", ulval);
5995                         return (-1);
5996                 }
5997                 return (htons(ulval));
5998         } else {
5999                 s = getservbyname(n, "tcp");
6000                 if (s == NULL)
6001                         s = getservbyname(n, "udp");
6002                 if (s == NULL) {
6003                         yyerror("unknown port %s", n);
6004                         return (-1);
6005                 }
6006                 return (s->s_port);
6007         }
6008 }
6009
6010 int
6011 rule_label(struct pf_rule *r, char *s)
6012 {
6013         if (s) {
6014                 if (strlcpy(r->label, s, sizeof(r->label)) >=
6015                     sizeof(r->label)) {
6016                         yyerror("rule label too long (max %zd chars)",
6017                             sizeof(r->label)-1);
6018                         return (-1);
6019                 }
6020         }
6021         return (0);
6022 }
6023
6024 u_int16_t
6025 parseicmpspec(char *w, sa_family_t af)
6026 {
6027         const struct icmpcodeent        *p;
6028         u_long                           ulval;
6029         u_int8_t                         icmptype;
6030
6031         if (af == AF_INET)
6032                 icmptype = returnicmpdefault >> 8;
6033         else
6034                 icmptype = returnicmp6default >> 8;
6035
6036         if (atoul(w, &ulval) == -1) {
6037                 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
6038                         yyerror("unknown icmp code %s", w);
6039                         return (0);
6040                 }
6041                 ulval = p->code;
6042         }
6043         if (ulval > 255) {
6044                 yyerror("invalid icmp code %lu", ulval);
6045                 return (0);
6046         }
6047         return (icmptype << 8 | ulval);
6048 }
6049
6050 int
6051 parseport(char *port, struct range *r, int extensions)
6052 {
6053         char    *p = strchr(port, ':');
6054
6055         if (p == NULL) {
6056                 if ((r->a = getservice(port)) == -1)
6057                         return (-1);
6058                 r->b = 0;
6059                 r->t = PF_OP_NONE;
6060                 return (0);
6061         }
6062         if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
6063                 *p = 0;
6064                 if ((r->a = getservice(port)) == -1)
6065                         return (-1);
6066                 r->b = 0;
6067                 r->t = PF_OP_IRG;
6068                 return (0);
6069         }
6070         if ((extensions & PPORT_RANGE)) {
6071                 *p++ = 0;
6072                 if ((r->a = getservice(port)) == -1 ||
6073                     (r->b = getservice(p)) == -1)
6074                         return (-1);
6075                 if (r->a == r->b) {
6076                         r->b = 0;
6077                         r->t = PF_OP_NONE;
6078                 } else
6079                         r->t = PF_OP_RRG;
6080                 return (0);
6081         }
6082         return (-1);
6083 }
6084
6085 int
6086 pfctl_load_anchors(int dev, struct pfctl *his_pf, struct pfr_buffer *trans)
6087 {
6088         struct loadanchors      *la;
6089
6090         TAILQ_FOREACH(la, &loadanchorshead, entries) {
6091                 if (his_pf->opts & PF_OPT_VERBOSE)
6092                         fprintf(stderr, "\nLoading anchor %s from %s\n",
6093                             la->anchorname, la->filename);
6094                 if (pfctl_rules(dev, la->filename, his_pf->opts, his_pf->optimize,
6095                     la->anchorname, trans) == -1)
6096                         return (-1);
6097         }
6098
6099         return (0);
6100 }