usr.sbin/pfctl/parse.y

   1 /*      $OpenBSD: parse.y,v 1.449 2004/03/20 23:20:20 david Exp $       */
   2 /*      $DragonFly: src/usr.sbin/pfctl/parse.y,v 1.2 2005/02/11 22:31:45 joerg Exp $ */
   3
   4 /*
   5  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
   6  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
   7  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
   8  * Copyright (c) 2002,2003 Henning Brauer. All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30 %{
  31 #include <sys/types.h>
  32 #include <sys/socket.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
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <netdb.h>
  49 #include <stdarg.h>
  50 #include <errno.h>
  51 #include <string.h>
  52 #include <ctype.h>
  53 #include <err.h>
  54 #include <limits.h>
  55 #include <pwd.h>
  56 #include <grp.h>
  57 #include <md5.h>
  58
  59 #include "pfctl_parser.h"
  60 #include "pfctl.h"
  61
  62 static struct pfctl     *pf = NULL;
  63 static FILE             *fin = NULL;
  64 static int               debug = 0;
  65 static int               lineno = 1;
  66 static int               errors = 0;
  67 static int               rulestate = 0;
  68 static u_int16_t         returnicmpdefault =
  69                             (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
  70 static u_int16_t         returnicmp6default =
  71                             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
  72 static int               blockpolicy = PFRULE_DROP;
  73 static int               require_order = 1;
  74 static int               default_statelock;
  75
  76 enum {
  77         PFCTL_STATE_NONE,
  78         PFCTL_STATE_OPTION,
  79         PFCTL_STATE_SCRUB,
  80         PFCTL_STATE_QUEUE,
  81         PFCTL_STATE_NAT,
  82         PFCTL_STATE_FILTER
  83 };
  84
  85 struct node_proto {
  86         u_int8_t                 proto;
  87         struct node_proto       *next;
  88         struct node_proto       *tail;
  89 };
  90
  91 struct node_port {
  92         u_int16_t                port[2];
  93         u_int8_t                 op;
  94         struct node_port        *next;
  95         struct node_port        *tail;
  96 };
  97
  98 struct node_uid {
  99         uid_t                    uid[2];
 100         u_int8_t                 op;
 101         struct node_uid         *next;
 102         struct node_uid         *tail;
 103 };
 104
 105 struct node_gid {
 106         gid_t                    gid[2];
 107         u_int8_t                 op;
 108         struct node_gid         *next;
 109         struct node_gid         *tail;
 110 };
 111
 112 struct node_icmp {
 113         u_int8_t                 code;
 114         u_int8_t                 type;
 115         u_int8_t                 proto;
 116         struct node_icmp        *next;
 117         struct node_icmp        *tail;
 118 };
 119
 120 enum    { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
 121             PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_NODES,
 122             PF_STATE_OPT_STATELOCK, PF_STATE_OPT_TIMEOUT };
 123
 124 enum    { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
 125
 126 struct node_state_opt {
 127         int                      type;
 128         union {
 129                 u_int32_t        max_states;
 130                 u_int32_t        max_src_states;
 131                 u_int32_t        max_src_nodes;
 132                 u_int8_t         src_track;
 133                 u_int32_t        statelock;
 134                 struct {
 135                         int             number;
 136                         u_int32_t       seconds;
 137                 }                timeout;
 138         }                        data;
 139         struct node_state_opt   *next;
 140         struct node_state_opt   *tail;
 141 };
 142
 143 struct peer {
 144         struct node_host        *host;
 145         struct node_port        *port;
 146 };
 147
 148 struct node_queue {
 149         char                     queue[PF_QNAME_SIZE];
 150         char                     parent[PF_QNAME_SIZE];
 151         char                     ifname[IFNAMSIZ];
 152         int                      scheduler;
 153         struct node_queue       *next;
 154         struct node_queue       *tail;
 155 }       *queues = NULL;
 156
 157 struct node_qassign {
 158         char            *qname;
 159         char            *pqname;
 160 };
 161
 162 struct filter_opts {
 163         int                      marker;
 164 #define FOM_FLAGS       0x01
 165 #define FOM_ICMP        0x02
 166 #define FOM_TOS         0x04
 167 #define FOM_KEEP        0x08
 168 #define FOM_SRCTRACK    0x10
 169         struct node_uid         *uid;
 170         struct node_gid         *gid;
 171         struct {
 172                 u_int8_t         b1;
 173                 u_int8_t         b2;
 174                 u_int16_t        w;
 175                 u_int16_t        w2;
 176         } flags;
 177         struct node_icmp        *icmpspec;
 178         u_int32_t                tos;
 179         struct {
 180                 int                      action;
 181                 struct node_state_opt   *options;
 182         } keep;
 183         int                      fragment;
 184         int                      allowopts;
 185         char                    *label;
 186         struct node_qassign      queues;
 187         char                    *tag;
 188         char                    *match_tag;
 189         u_int8_t                 match_tag_not;
 190 } filter_opts;
 191
 192 struct antispoof_opts {
 193         char                    *label;
 194 } antispoof_opts;
 195
 196 struct scrub_opts {
 197         int                     marker;
 198 #define SOM_MINTTL      0x01
 199 #define SOM_MAXMSS      0x02
 200 #define SOM_FRAGCACHE   0x04
 201         int                     nodf;
 202         int                     minttl;
 203         int                     maxmss;
 204         int                     fragcache;
 205         int                     randomid;
 206         int                     reassemble_tcp;
 207 } scrub_opts;
 208
 209 struct queue_opts {
 210         int                     marker;
 211 #define QOM_BWSPEC      0x01
 212 #define QOM_SCHEDULER   0x02
 213 #define QOM_PRIORITY    0x04
 214 #define QOM_TBRSIZE     0x08
 215 #define QOM_QLIMIT      0x10
 216         struct node_queue_bw    queue_bwspec;
 217         struct node_queue_opt   scheduler;
 218         int                     priority;
 219         int                     tbrsize;
 220         int                     qlimit;
 221 } queue_opts;
 222
 223 struct table_opts {
 224         int                     flags;
 225         int                     init_addr;
 226         struct node_tinithead   init_nodes;
 227 } table_opts;
 228
 229 struct pool_opts {
 230         int                      marker;
 231 #define POM_TYPE                0x01
 232 #define POM_STICKYADDRESS       0x02
 233         u_int8_t                 opts;
 234         int                      type;
 235         int                      staticport;
 236         struct pf_poolhashkey   *key;
 237
 238 } pool_opts;
 239
 240
 241 struct node_hfsc_opts   hfsc_opts;
 242
 243 int     yyerror(const char *, ...);
 244 int     disallow_table(struct node_host *, const char *);
 245 int     disallow_alias(struct node_host *, const char *);
 246 int     rule_consistent(struct pf_rule *);
 247 int     filter_consistent(struct pf_rule *);
 248 int     nat_consistent(struct pf_rule *);
 249 int     rdr_consistent(struct pf_rule *);
 250 int     process_tabledef(char *, struct table_opts *);
 251 int     yyparse(void);
 252 void    expand_label_str(char *, size_t, const char *, const char *);
 253 void    expand_label_if(const char *, char *, size_t, const char *);
 254 void    expand_label_addr(const char *, char *, size_t, u_int8_t,
 255             struct node_host *);
 256 void    expand_label_port(const char *, char *, size_t, struct node_port *);
 257 void    expand_label_proto(const char *, char *, size_t, u_int8_t);
 258 void    expand_label_nr(const char *, char *, size_t);
 259 void    expand_label(char *, size_t, const char *, u_int8_t, struct node_host *,
 260             struct node_port *, struct node_host *, struct node_port *,
 261             u_int8_t);
 262 void    expand_rule(struct pf_rule *, struct node_if *, struct node_host *,
 263             struct node_proto *, struct node_os*, struct node_host *,
 264             struct node_port *, struct node_host *, struct node_port *,
 265             struct node_uid *, struct node_gid *, struct node_icmp *);
 266 int     expand_altq(struct pf_altq *, struct node_if *, struct node_queue *,
 267             struct node_queue_bw bwspec, struct node_queue_opt *);
 268 int     expand_queue(struct pf_altq *, struct node_if *, struct node_queue *,
 269             struct node_queue_bw, struct node_queue_opt *);
 270
 271 int      check_rulestate(int);
 272 int      kw_cmp(const void *, const void *);
 273 int      lookup(char *);
 274 int      lgetc(FILE *);
 275 int      lungetc(int);
 276 int      findeol(void);
 277 int      yylex(void);
 278 int      atoul(char *, u_long *);
 279 int      getservice(char *);
 280 int      rule_label(struct pf_rule *, char *);
 281
 282 TAILQ_HEAD(symhead, sym)         symhead = TAILQ_HEAD_INITIALIZER(symhead);
 283 struct sym {
 284         TAILQ_ENTRY(sym)         entries;
 285         int                      used;
 286         int                      persist;
 287         char                    *nam;
 288         char                    *val;
 289 };
 290
 291
 292 int      symset(const char *, const char *, int);
 293 char    *symget(const char *);
 294
 295 void     decide_address_family(struct node_host *, sa_family_t *);
 296 void     remove_invalid_hosts(struct node_host **, sa_family_t *);
 297 int      invalid_redirect(struct node_host *, sa_family_t);
 298 u_int16_t parseicmpspec(char *, sa_family_t);
 299
 300 TAILQ_HEAD(loadanchorshead, loadanchors)
 301     loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
 302
 303 struct loadanchors {
 304         TAILQ_ENTRY(loadanchors)         entries;
 305         char                            *anchorname;
 306         char                            *rulesetname;
 307         char                            *filename;
 308 };
 309
 310 typedef struct {
 311         union {
 312                 u_int32_t                number;
 313                 int                      i;
 314                 char                    *string;
 315                 struct {
 316                         u_int8_t         b1;
 317                         u_int8_t         b2;
 318                         u_int16_t        w;
 319                         u_int16_t        w2;
 320                 }                        b;
 321                 struct range {
 322                         int              a;
 323                         int              b;
 324                         int              t;
 325                 }                        range;
 326                 struct node_if          *interface;
 327                 struct node_proto       *proto;
 328                 struct node_icmp        *icmp;
 329                 struct node_host        *host;
 330                 struct node_os          *os;
 331                 struct node_port        *port;
 332                 struct node_uid         *uid;
 333                 struct node_gid         *gid;
 334                 struct node_state_opt   *state_opt;
 335                 struct peer              peer;
 336                 struct {
 337                         struct peer      src, dst;
 338                         struct node_os  *src_os;
 339                 }                        fromto;
 340                 struct {
 341                         struct node_host        *host;
 342                         u_int8_t                 rt;
 343                         u_int8_t                 pool_opts;
 344                         sa_family_t              af;
 345                         struct pf_poolhashkey   *key;
 346                 }                        route;
 347                 struct redirection {
 348                         struct node_host        *host;
 349                         struct range             rport;
 350                 }                       *redirection;
 351                 struct {
 352                         int                      action;
 353                         struct node_state_opt   *options;
 354                 }                        keep_state;
 355                 struct {
 356                         u_int8_t         log;
 357                         u_int8_t         quick;
 358                 }                        logquick;
 359                 struct pf_poolhashkey   *hashkey;
 360                 struct node_queue       *queue;
 361                 struct node_queue_opt    queue_options;
 362                 struct node_queue_bw     queue_bwspec;
 363                 struct node_qassign      qassign;
 364                 struct filter_opts       filter_opts;
 365                 struct antispoof_opts    antispoof_opts;
 366                 struct queue_opts        queue_opts;
 367                 struct scrub_opts        scrub_opts;
 368                 struct table_opts        table_opts;
 369                 struct pool_opts         pool_opts;
 370                 struct node_hfsc_opts    hfsc_opts;
 371         } v;
 372         int lineno;
 373 } YYSTYPE;
 374
 375 #define PREPARE_ANCHOR_RULE(r, a)                               \
 376         do {                                                    \
 377                 memset(&(r), 0, sizeof(r));                     \
 378                 if (strlcpy(r.anchorname, (a),                  \
 379                     sizeof(r.anchorname)) >=                    \
 380                     sizeof(r.anchorname)) {                     \
 381                         yyerror("anchor name '%s' too long",    \
 382                             (a));                               \
 383                         YYERROR;                                \
 384                 }                                               \
 385         } while (0)
 386
 387 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
 388         (!((addr).iflags & PFI_AFLAG_NOALIAS) ||                 \
 389         !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
 390
 391 extern char     *infile;
 392
 393 %}
 394
 395 %token  PASS BLOCK SCRUB RETURN IN OS OUT LOG LOGALL QUICK ON FROM TO FLAGS
 396 %token  RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
 397 %token  ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
 398 %token  MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
 399 %token  NOROUTE FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
 400 %token  REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
 401 %token  SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
 402 %token  REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG HOSTID
 403 %token  ANTISPOOF FOR
 404 %token  BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT
 405 %token  ALTQ CBQ PRIQ HFSC BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT
 406 %token  QUEUE PRIORITY QLIMIT
 407 %token  LOAD
 408 %token  STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
 409 %token  TAGGED TAG IFBOUND GRBOUND FLOATING STATEPOLICY
 410 %token  <v.string>              STRING
 411 %token  <v.i>                   PORTBINARY
 412 %type   <v.interface>           interface if_list if_item_not if_item
 413 %type   <v.number>              number icmptype icmp6type uid gid
 414 %type   <v.number>              tos not yesno natpass
 415 %type   <v.i>                   no dir log af fragcache sourcetrack
 416 %type   <v.i>                   unaryop statelock
 417 %type   <v.b>                   action nataction flags flag blockspec
 418 %type   <v.range>               port rport
 419 %type   <v.hashkey>             hashkey
 420 %type   <v.proto>               proto proto_list proto_item
 421 %type   <v.icmp>                icmpspec
 422 %type   <v.icmp>                icmp_list icmp_item
 423 %type   <v.icmp>                icmp6_list icmp6_item
 424 %type   <v.fromto>              fromto
 425 %type   <v.peer>                ipportspec from to
 426 %type   <v.host>                ipspec xhost host dynaddr host_list
 427 %type   <v.host>                redir_host_list redirspec
 428 %type   <v.host>                route_host route_host_list routespec
 429 %type   <v.os>                  os xos os_list
 430 %type   <v.port>                portspec port_list port_item
 431 %type   <v.uid>                 uids uid_list uid_item
 432 %type   <v.gid>                 gids gid_list gid_item
 433 %type   <v.route>               route
 434 %type   <v.redirection>         redirection redirpool
 435 %type   <v.string>              label string tag
 436 %type   <v.keep_state>          keep
 437 %type   <v.state_opt>           state_opt_spec state_opt_list state_opt_item
 438 %type   <v.logquick>            logquick
 439 %type   <v.interface>           antispoof_ifspc antispoof_iflst
 440 %type   <v.qassign>             qname
 441 %type   <v.queue>               qassign qassign_list qassign_item
 442 %type   <v.queue_options>       scheduler
 443 %type   <v.number>              cbqflags_list cbqflags_item
 444 %type   <v.number>              priqflags_list priqflags_item
 445 %type   <v.hfsc_opts>           hfscopts_list hfscopts_item hfsc_opts
 446 %type   <v.queue_bwspec>        bandwidth
 447 %type   <v.filter_opts>         filter_opts filter_opt filter_opts_l
 448 %type   <v.antispoof_opts>      antispoof_opts antispoof_opt antispoof_opts_l
 449 %type   <v.queue_opts>          queue_opts queue_opt queue_opts_l
 450 %type   <v.scrub_opts>          scrub_opts scrub_opt scrub_opts_l
 451 %type   <v.table_opts>          table_opts table_opt table_opts_l
 452 %type   <v.pool_opts>           pool_opts pool_opt pool_opts_l
 453 %%
 454
 455 ruleset         : /* empty */
 456                 | ruleset '\n'
 457                 | ruleset option '\n'
 458                 | ruleset scrubrule '\n'
 459                 | ruleset natrule '\n'
 460                 | ruleset binatrule '\n'
 461                 | ruleset pfrule '\n'
 462                 | ruleset anchorrule '\n'
 463                 | ruleset loadrule '\n'
 464                 | ruleset altqif '\n'
 465                 | ruleset queuespec '\n'
 466                 | ruleset varset '\n'
 467                 | ruleset antispoof '\n'
 468                 | ruleset tabledef '\n'
 469                 | ruleset error '\n'            { errors++; }
 470                 ;
 471
 472 option          : SET OPTIMIZATION STRING               {
 473                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 474                                 free($3);
 475                                 YYERROR;
 476                         }
 477                         if (pfctl_set_optimization(pf, $3) != 0) {
 478                                 yyerror("unknown optimization %s", $3);
 479                                 free($3);
 480                                 YYERROR;
 481                         }
 482                         free ($3);
 483                 }
 484                 | SET TIMEOUT timeout_spec
 485                 | SET TIMEOUT '{' timeout_list '}'
 486                 | SET LIMIT limit_spec
 487                 | SET LIMIT '{' limit_list '}'
 488                 | SET LOGINTERFACE STRING               {
 489                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 490                                 free($3);
 491                                 YYERROR;
 492                         }
 493                         if ((ifa_exists($3, 0) == NULL) && strcmp($3, "none")) {
 494                                 yyerror("interface %s doesn't exist", $3);
 495                                 free($3);
 496                                 YYERROR;
 497                         }
 498                         if (pfctl_set_logif(pf, $3) != 0) {
 499                                 yyerror("error setting loginterface %s", $3);
 500                                 free($3);
 501                                 YYERROR;
 502                         }
 503                         free($3);
 504                 }
 505                 | SET HOSTID number {
 506                         if ($3 == 0) {
 507                                 yyerror("hostid must be non-zero");
 508                                 YYERROR;
 509                         }
 510                         if (pfctl_set_hostid(pf, $3) != 0) {
 511                                 yyerror("error setting loginterface %08x", $3);
 512                                 YYERROR;
 513                         }
 514                 }
 515                 | SET BLOCKPOLICY DROP  {
 516                         if (pf->opts & PF_OPT_VERBOSE)
 517                                 printf("set block-policy drop\n");
 518                         if (check_rulestate(PFCTL_STATE_OPTION))
 519                                 YYERROR;
 520                         blockpolicy = PFRULE_DROP;
 521                 }
 522                 | SET BLOCKPOLICY RETURN {
 523                         if (pf->opts & PF_OPT_VERBOSE)
 524                                 printf("set block-policy return\n");
 525                         if (check_rulestate(PFCTL_STATE_OPTION))
 526                                 YYERROR;
 527                         blockpolicy = PFRULE_RETURN;
 528                 }
 529                 | SET REQUIREORDER yesno {
 530                         if (pf->opts & PF_OPT_VERBOSE)
 531                                 printf("set require-order %s\n",
 532                                     $3 == 1 ? "yes" : "no");
 533                         require_order = $3;
 534                 }
 535                 | SET FINGERPRINTS STRING {
 536                         if (pf->opts & PF_OPT_VERBOSE)
 537                                 printf("fingerprints %s\n", $3);
 538                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 539                                 free($3);
 540                                 YYERROR;
 541                         }
 542                         if (pfctl_file_fingerprints(pf->dev, pf->opts, $3)) {
 543                                 yyerror("error loading fingerprints %s", $3);
 544                                 free($3);
 545                                 YYERROR;
 546                         }
 547                         free($3);
 548                 }
 549                 | SET STATEPOLICY statelock {
 550                         if (pf->opts & PF_OPT_VERBOSE)
 551                                 switch ($3) {
 552                                 case 0:
 553                                         printf("set state-policy floating\n");
 554                                         break;
 555                                 case PFRULE_IFBOUND:
 556                                         printf("set state-policy if-bound\n");
 557                                         break;
 558                                 case PFRULE_GRBOUND:
 559                                         printf("set state-policy "
 560                                             "group-bound\n");
 561                                         break;
 562                                 }
 563                         default_statelock = $3;
 564                 }
 565                 | SET DEBUG STRING {
 566                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 567                                 free($3);
 568                                 YYERROR;
 569                         }
 570                         if (pfctl_set_debug(pf, $3) != 0) {
 571                                 yyerror("error setting debuglevel %s", $3);
 572                                 free($3);
 573                                 YYERROR;
 574                         }
 575                         free($3);
 576                 }
 577                 ;
 578
 579 string          : string STRING                         {
 580                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 581                                 err(1, "string: asprintf");
 582                         free($1);
 583                         free($2);
 584                 }
 585                 | STRING
 586                 ;
 587
 588 varset          : STRING '=' string             {
 589                         if (pf->opts & PF_OPT_VERBOSE)
 590                                 printf("%s = \"%s\"\n", $1, $3);
 591                         if (symset($1, $3, 0) == -1)
 592                                 err(1, "cannot store variable %s", $1);
 593                         free($1);
 594                         free($3);
 595                 }
 596                 ;
 597
 598 anchorrule      : ANCHOR string dir interface af proto fromto filter_opts {
 599                         struct pf_rule  r;
 600
 601                         if (check_rulestate(PFCTL_STATE_FILTER)) {
 602                                 free($2);
 603                                 YYERROR;
 604                         }
 605
 606                         PREPARE_ANCHOR_RULE(r, $2);
 607                         r.direction = $3;
 608                         r.af = $5;
 609
 610                         if ($8.match_tag)
 611                                 if (strlcpy(r.match_tagname, $8.match_tag,
 612                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 613                                         yyerror("tag too long, max %u chars",
 614                                             PF_TAG_NAME_SIZE - 1);
 615                                         YYERROR;
 616                                 }
 617                         r.match_tag_not = $8.match_tag_not;
 618
 619                         decide_address_family($7.src.host, &r.af);
 620                         decide_address_family($7.dst.host, &r.af);
 621
 622                         expand_rule(&r, $4, NULL, $6, $7.src_os,
 623                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
 624                             0, 0, 0);
 625                 }
 626                 | NATANCHOR string interface af proto fromto {
 627                         struct pf_rule  r;
 628
 629                         if (check_rulestate(PFCTL_STATE_NAT)) {
 630                                 free($2);
 631                                 YYERROR;
 632                         }
 633
 634                         PREPARE_ANCHOR_RULE(r, $2);
 635                         free($2);
 636                         r.action = PF_NAT;
 637                         r.af = $4;
 638
 639                         decide_address_family($6.src.host, &r.af);
 640                         decide_address_family($6.dst.host, &r.af);
 641
 642                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 643                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 644                             0, 0, 0);
 645                 }
 646                 | RDRANCHOR string interface af proto fromto {
 647                         struct pf_rule  r;
 648
 649                         if (check_rulestate(PFCTL_STATE_NAT)) {
 650                                 free($2);
 651                                 YYERROR;
 652                         }
 653
 654                         PREPARE_ANCHOR_RULE(r, $2);
 655                         free($2);
 656                         r.action = PF_RDR;
 657                         r.af = $4;
 658
 659                         decide_address_family($6.src.host, &r.af);
 660                         decide_address_family($6.dst.host, &r.af);
 661
 662                         if ($6.src.port != NULL) {
 663                                 yyerror("source port parameter not supported"
 664                                     " in rdr-anchor");
 665                                 YYERROR;
 666                         }
 667                         if ($6.dst.port != NULL) {
 668                                 if ($6.dst.port->next != NULL) {
 669                                         yyerror("destination port list "
 670                                             "expansion not supported in "
 671                                             "rdr-anchor");
 672                                         YYERROR;
 673                                 } else if ($6.dst.port->op != PF_OP_EQ) {
 674                                         yyerror("destination port operators"
 675                                             " not supported in rdr-anchor");
 676                                         YYERROR;
 677                                 }
 678                                 r.dst.port[0] = $6.dst.port->port[0];
 679                                 r.dst.port[1] = $6.dst.port->port[1];
 680                                 r.dst.port_op = $6.dst.port->op;
 681                         }
 682
 683                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 684                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 685                             0, 0, 0);
 686                 }
 687                 | BINATANCHOR string interface af proto fromto {
 688                         struct pf_rule  r;
 689
 690                         if (check_rulestate(PFCTL_STATE_NAT)) {
 691                                 free($2);
 692                                 YYERROR;
 693                         }
 694
 695                         PREPARE_ANCHOR_RULE(r, $2);
 696                         free($2);
 697                         r.action = PF_BINAT;
 698                         r.af = $4;
 699                         if ($5 != NULL) {
 700                                 if ($5->next != NULL) {
 701                                         yyerror("proto list expansion"
 702                                             " not supported in binat-anchor");
 703                                         YYERROR;
 704                                 }
 705                                 r.proto = $5->proto;
 706                                 free($5);
 707                         }
 708
 709                         if ($6.src.host != NULL || $6.src.port != NULL ||
 710                             $6.dst.host != NULL || $6.dst.port != NULL) {
 711                                 yyerror("fromto parameter not supported"
 712                                     " in binat-anchor");
 713                                 YYERROR;
 714                         }
 715
 716                         decide_address_family($6.src.host, &r.af);
 717                         decide_address_family($6.dst.host, &r.af);
 718
 719                         pfctl_add_rule(pf, &r);
 720                 }
 721                 ;
 722
 723 loadrule        : LOAD ANCHOR string FROM string        {
 724                         char                    *t;
 725                         struct loadanchors      *loadanchor;
 726
 727                         t = strsep(&$3, ":");
 728                         if (*t == '\0' || $3 == NULL || *$3 == '\0') {
 729                                 yyerror("anchor '%s' invalid\n", $3);
 730                                 free(t);
 731                                 YYERROR;
 732                         }
 733                         if (strlen(t) >= PF_ANCHOR_NAME_SIZE) {
 734                                 yyerror("anchorname %s too long, max %u\n",
 735                                     t, PF_ANCHOR_NAME_SIZE - 1);
 736                                 free(t);
 737                                 YYERROR;
 738                         }
 739                         if (strlen($3) >= PF_RULESET_NAME_SIZE) {
 740                                 yyerror("rulesetname %s too long, max %u\n",
 741                                     $3, PF_RULESET_NAME_SIZE - 1);
 742                                 free(t);
 743                                 YYERROR;
 744                         }
 745
 746                         loadanchor = calloc(1, sizeof(struct loadanchors));
 747                         if (loadanchor == NULL)
 748                                 err(1, "loadrule: calloc");
 749                         if ((loadanchor->anchorname = strdup(t)) == NULL)
 750                                 err(1, "loadrule: strdup");
 751                         if ((loadanchor->rulesetname = strdup($3)) == NULL)
 752                                 err(1, "loadrule: strdup");
 753                         if ((loadanchor->filename = strdup($5)) == NULL)
 754                                 err(1, "loadrule: strdup");
 755
 756                         TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
 757                             entries);
 758
 759                         free(t); /* not $3 */
 760                         free($5);
 761                 };
 762
 763 scrubrule       : SCRUB dir logquick interface af proto fromto scrub_opts
 764                 {
 765                         struct pf_rule  r;
 766
 767                         if (check_rulestate(PFCTL_STATE_SCRUB))
 768                                 YYERROR;
 769
 770                         memset(&r, 0, sizeof(r));
 771
 772                         r.action = PF_SCRUB;
 773                         r.direction = $2;
 774
 775                         r.log = $3.log;
 776                         if ($3.quick) {
 777                                 yyerror("scrub rules do not support 'quick'");
 778                                 YYERROR;
 779                         }
 780
 781                         r.af = $5;
 782                         if ($8.nodf)
 783                                 r.rule_flag |= PFRULE_NODF;
 784                         if ($8.randomid)
 785                                 r.rule_flag |= PFRULE_RANDOMID;
 786                         if ($8.reassemble_tcp) {
 787                                 if (r.direction != PF_INOUT) {
 788                                         yyerror("reassemble tcp rules can not "
 789                                             "specify direction");
 790                                         YYERROR;
 791                                 }
 792                                 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
 793                         }
 794                         if ($8.minttl)
 795                                 r.min_ttl = $8.minttl;
 796                         if ($8.maxmss)
 797                                 r.max_mss = $8.maxmss;
 798                         if ($8.fragcache)
 799                                 r.rule_flag |= $8.fragcache;
 800
 801                         expand_rule(&r, $4, NULL, $6, $7.src_os,
 802                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
 803                             NULL, NULL, NULL);
 804                 }
 805                 ;
 806
 807 scrub_opts      :       {
 808                         bzero(&scrub_opts, sizeof scrub_opts);
 809                 }
 810                     scrub_opts_l
 811                         { $$ = scrub_opts; }
 812                 | /* empty */ {
 813                         bzero(&scrub_opts, sizeof scrub_opts);
 814                         $$ = scrub_opts;
 815                 }
 816                 ;
 817
 818 scrub_opts_l    : scrub_opts_l scrub_opt
 819                 | scrub_opt
 820                 ;
 821
 822 scrub_opt       : NODF  {
 823                         if (scrub_opts.nodf) {
 824                                 yyerror("no-df cannot be respecified");
 825                                 YYERROR;
 826                         }
 827                         scrub_opts.nodf = 1;
 828                 }
 829                 | MINTTL number {
 830                         if (scrub_opts.marker & SOM_MINTTL) {
 831                                 yyerror("min-ttl cannot be respecified");
 832                                 YYERROR;
 833                         }
 834                         if ($2 > 255) {
 835                                 yyerror("illegal min-ttl value %d", $2);
 836                                 YYERROR;
 837                         }
 838                         scrub_opts.marker |= SOM_MINTTL;
 839                         scrub_opts.minttl = $2;
 840                 }
 841                 | MAXMSS number {
 842                         if (scrub_opts.marker & SOM_MAXMSS) {
 843                                 yyerror("max-mss cannot be respecified");
 844                                 YYERROR;
 845                         }
 846                         if ($2 > 65535) {
 847                                 yyerror("illegal max-mss value %d", $2);
 848                                 YYERROR;
 849                         }
 850                         scrub_opts.marker |= SOM_MAXMSS;
 851                         scrub_opts.maxmss = $2;
 852                 }
 853                 | fragcache {
 854                         if (scrub_opts.marker & SOM_FRAGCACHE) {
 855                                 yyerror("fragcache cannot be respecified");
 856                                 YYERROR;
 857                         }
 858                         scrub_opts.marker |= SOM_FRAGCACHE;
 859                         scrub_opts.fragcache = $1;
 860                 }
 861                 | REASSEMBLE STRING {
 862                         if (strcasecmp($2, "tcp") != 0) {
 863                                 free($2);
 864                                 YYERROR;
 865                         }
 866                         free($2);
 867                         if (scrub_opts.reassemble_tcp) {
 868                                 yyerror("reassemble tcp cannot be respecified");
 869                                 YYERROR;
 870                         }
 871                         scrub_opts.reassemble_tcp = 1;
 872                 }
 873                 | RANDOMID {
 874                         if (scrub_opts.randomid) {
 875                                 yyerror("random-id cannot be respecified");
 876                                 YYERROR;
 877                         }
 878                         scrub_opts.randomid = 1;
 879                 }
 880                 ;
 881
 882 fragcache       : FRAGMENT REASSEMBLE   { $$ = 0; /* default */ }
 883                 | FRAGMENT FRAGCROP     { $$ = PFRULE_FRAGCROP; }
 884                 | FRAGMENT FRAGDROP     { $$ = PFRULE_FRAGDROP; }
 885                 ;
 886
 887 antispoof       : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
 888                         struct pf_rule           r;
 889                         struct node_host        *h = NULL;
 890                         struct node_if          *i, *j;
 891
 892                         if (check_rulestate(PFCTL_STATE_FILTER))
 893                                 YYERROR;
 894
 895                         for (i = $3; i; i = i->next) {
 896                                 bzero(&r, sizeof(r));
 897
 898                                 r.action = PF_DROP;
 899                                 r.direction = PF_IN;
 900                                 r.log = $2.log;
 901                                 r.quick = $2.quick;
 902                                 r.af = $4;
 903                                 if (rule_label(&r, $5.label))
 904                                         YYERROR;
 905                                 j = calloc(1, sizeof(struct node_if));
 906                                 if (j == NULL)
 907                                         err(1, "antispoof: calloc");
 908                                 if (strlcpy(j->ifname, i->ifname,
 909                                     sizeof(j->ifname)) >= sizeof(j->ifname)) {
 910                                         free(j);
 911                                         yyerror("interface name too long");
 912                                         YYERROR;
 913                                 }
 914                                 j->not = 1;
 915                                 h = ifa_lookup(j->ifname, PFI_AFLAG_NETWORK);
 916
 917                                 if (h != NULL)
 918                                         expand_rule(&r, j, NULL, NULL, NULL, h,
 919                                             NULL, NULL, NULL, NULL, NULL, NULL);
 920
 921                                 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
 922                                         bzero(&r, sizeof(r));
 923
 924                                         r.action = PF_DROP;
 925                                         r.direction = PF_IN;
 926                                         r.log = $2.log;
 927                                         r.quick = $2.quick;
 928                                         r.af = $4;
 929                                         if (rule_label(&r, $5.label))
 930                                                 YYERROR;
 931                                         h = ifa_lookup(i->ifname, 0);
 932                                         if (h != NULL)
 933                                                 expand_rule(&r, NULL, NULL,
 934                                                     NULL, NULL, h, NULL, NULL,
 935                                                     NULL, NULL, NULL, NULL);
 936                                 }
 937                         }
 938                         free($5.label);
 939                 }
 940                 ;
 941
 942 antispoof_ifspc : FOR if_item                   { $$ = $2; }
 943                 | FOR '{' antispoof_iflst '}'   { $$ = $3; }
 944                 ;
 945
 946 antispoof_iflst : if_item                       { $$ = $1; }
 947                 | antispoof_iflst comma if_item {
 948                         $1->tail->next = $3;
 949                         $1->tail = $3;
 950                         $$ = $1;
 951                 }
 952                 ;
 953
 954 antispoof_opts  :       { bzero(&antispoof_opts, sizeof antispoof_opts); }
 955                     antispoof_opts_l
 956                         { $$ = antispoof_opts; }
 957                 | /* empty */   {
 958                         bzero(&antispoof_opts, sizeof antispoof_opts);
 959                         $$ = antispoof_opts;
 960                 }
 961                 ;
 962
 963 antispoof_opts_l        : antispoof_opts_l antispoof_opt
 964                         | antispoof_opt
 965                         ;
 966
 967 antispoof_opt   : label {
 968                         if (antispoof_opts.label) {
 969                                 yyerror("label cannot be redefined");
 970                                 YYERROR;
 971                         }
 972                         antispoof_opts.label = $1;
 973                 }
 974                 ;
 975
 976 not             : '!'           { $$ = 1; }
 977                 | /* empty */   { $$ = 0; }
 978                 ;
 979
 980 tabledef        : TABLE '<' STRING '>' table_opts {
 981                         struct node_host         *h, *nh;
 982                         struct node_tinit        *ti, *nti;
 983
 984                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
 985                                 yyerror("table name too long, max %d chars",
 986                                     PF_TABLE_NAME_SIZE - 1);
 987                                 free($3);
 988                                 YYERROR;
 989                         }
 990                         if (pf->loadopt & PFCTL_FLAG_TABLE)
 991                                 if (process_tabledef($3, &$5)) {
 992                                         free($3);
 993                                         YYERROR;
 994                                 }
 995                         free($3);
 996                         for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
 997                             ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
 998                                 if (ti->file)
 999                                         free(ti->file);
1000                                 for (h = ti->host; h != NULL; h = nh) {
1001                                         nh = h->next;
1002                                         free(h);
1003                                 }
1004                                 nti = SIMPLEQ_NEXT(ti, entries);
1005                                 free(ti);
1006                         }
1007                 }
1008                 ;
1009
1010 table_opts      :       {
1011                         bzero(&table_opts, sizeof table_opts);
1012                         SIMPLEQ_INIT(&table_opts.init_nodes);
1013                 }
1014                     table_opts_l
1015                         { $$ = table_opts; }
1016                 | /* empty */
1017                         {
1018                         bzero(&table_opts, sizeof table_opts);
1019                         SIMPLEQ_INIT(&table_opts.init_nodes);
1020                         $$ = table_opts;
1021                 }
1022                 ;
1023
1024 table_opts_l    : table_opts_l table_opt
1025                 | table_opt
1026                 ;
1027
1028 table_opt       : STRING                {
1029                         if (!strcmp($1, "const"))
1030                                 table_opts.flags |= PFR_TFLAG_CONST;
1031                         else if (!strcmp($1, "persist"))
1032                                 table_opts.flags |= PFR_TFLAG_PERSIST;
1033                         else {
1034                                 free($1);
1035                                 YYERROR;
1036                         }
1037                         free($1);
1038                 }
1039                 | '{' '}'               { table_opts.init_addr = 1; }
1040                 | '{' host_list '}'     {
1041                         struct node_host        *n;
1042                         struct node_tinit       *ti;
1043
1044                         for (n = $2; n != NULL; n = n->next) {
1045                                 switch (n->addr.type) {
1046                                 case PF_ADDR_ADDRMASK:
1047                                         continue; /* ok */
1048                                 case PF_ADDR_DYNIFTL:
1049                                         yyerror("dynamic addresses are not "
1050                                             "permitted inside tables");
1051                                         break;
1052                                 case PF_ADDR_TABLE:
1053                                         yyerror("tables cannot contain tables");
1054                                         break;
1055                                 case PF_ADDR_NOROUTE:
1056                                         yyerror("\"no-route\" is not permitted "
1057                                             "inside tables");
1058                                         break;
1059                                 default:
1060                                         yyerror("unknown address type %d",
1061                                             n->addr.type);
1062                                 }
1063                                 YYERROR;
1064                         }
1065                         if (!(ti = calloc(1, sizeof(*ti))))
1066                                 err(1, "table_opt: calloc");
1067                         ti->host = $2;
1068                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1069                             entries);
1070                         table_opts.init_addr = 1;
1071                 }
1072                 | FILENAME STRING       {
1073                         struct node_tinit       *ti;
1074
1075                         if (!(ti = calloc(1, sizeof(*ti))))
1076                                 err(1, "table_opt: calloc");
1077                         ti->file = $2;
1078                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1079                             entries);
1080                         table_opts.init_addr = 1;
1081                 }
1082                 ;
1083
1084 altqif          : ALTQ interface queue_opts QUEUE qassign {
1085                         struct pf_altq  a;
1086
1087                         if (check_rulestate(PFCTL_STATE_QUEUE))
1088                                 YYERROR;
1089
1090                         memset(&a, 0, sizeof(a));
1091                         if ($3.scheduler.qtype == ALTQT_NONE) {
1092                                 yyerror("no scheduler specified!");
1093                                 YYERROR;
1094                         }
1095                         a.scheduler = $3.scheduler.qtype;
1096                         a.qlimit = $3.qlimit;
1097                         a.tbrsize = $3.tbrsize;
1098                         if ($5 == NULL) {
1099                                 yyerror("no child queues specified");
1100                                 YYERROR;
1101                         }
1102                         if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1103                             &$3.scheduler))
1104                                 YYERROR;
1105                 }
1106                 ;
1107
1108 queuespec       : QUEUE STRING interface queue_opts qassign {
1109                         struct pf_altq  a;
1110
1111                         if (check_rulestate(PFCTL_STATE_QUEUE)) {
1112                                 free($2);
1113                                 YYERROR;
1114                         }
1115
1116                         memset(&a, 0, sizeof(a));
1117
1118                         if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1119                             sizeof(a.qname)) {
1120                                 yyerror("queue name too long (max "
1121                                     "%d chars)", PF_QNAME_SIZE-1);
1122                                 free($2);
1123                                 YYERROR;
1124                         }
1125                         free($2);
1126                         if ($4.tbrsize) {
1127                                 yyerror("cannot specify tbrsize for queue");
1128                                 YYERROR;
1129                         }
1130                         if ($4.priority > 255) {
1131                                 yyerror("priority out of range: max 255");
1132                                 YYERROR;
1133                         }
1134                         a.priority = $4.priority;
1135                         a.qlimit = $4.qlimit;
1136                         a.scheduler = $4.scheduler.qtype;
1137                         if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1138                             &$4.scheduler)) {
1139                                 yyerror("errors in queue definition");
1140                                 YYERROR;
1141                         }
1142                 }
1143                 ;
1144
1145 queue_opts      :       {
1146                         bzero(&queue_opts, sizeof queue_opts);
1147                         queue_opts.priority = DEFAULT_PRIORITY;
1148                         queue_opts.qlimit = DEFAULT_QLIMIT;
1149                         queue_opts.scheduler.qtype = ALTQT_NONE;
1150                         queue_opts.queue_bwspec.bw_percent = 100;
1151                 }
1152                     queue_opts_l
1153                         { $$ = queue_opts; }
1154                 | /* empty */ {
1155                         bzero(&queue_opts, sizeof queue_opts);
1156                         queue_opts.priority = DEFAULT_PRIORITY;
1157                         queue_opts.qlimit = DEFAULT_QLIMIT;
1158                         queue_opts.scheduler.qtype = ALTQT_NONE;
1159                         queue_opts.queue_bwspec.bw_percent = 100;
1160                         $$ = queue_opts;
1161                 }
1162                 ;
1163
1164 queue_opts_l    : queue_opts_l queue_opt
1165                 | queue_opt
1166                 ;
1167
1168 queue_opt       : BANDWIDTH bandwidth   {
1169                         if (queue_opts.marker & QOM_BWSPEC) {
1170                                 yyerror("bandwidth cannot be respecified");
1171                                 YYERROR;
1172                         }
1173                         queue_opts.marker |= QOM_BWSPEC;
1174                         queue_opts.queue_bwspec = $2;
1175                 }
1176                 | PRIORITY number       {
1177                         if (queue_opts.marker & QOM_PRIORITY) {
1178                                 yyerror("priority cannot be respecified");
1179                                 YYERROR;
1180                         }
1181                         if ($2 > 255) {
1182                                 yyerror("priority out of range: max 255");
1183                                 YYERROR;
1184                         }
1185                         queue_opts.marker |= QOM_PRIORITY;
1186                         queue_opts.priority = $2;
1187                 }
1188                 | QLIMIT number {
1189                         if (queue_opts.marker & QOM_QLIMIT) {
1190                                 yyerror("qlimit cannot be respecified");
1191                                 YYERROR;
1192                         }
1193                         if ($2 > 65535) {
1194                                 yyerror("qlimit out of range: max 65535");
1195                                 YYERROR;
1196                         }
1197                         queue_opts.marker |= QOM_QLIMIT;
1198                         queue_opts.qlimit = $2;
1199                 }
1200                 | scheduler     {
1201                         if (queue_opts.marker & QOM_SCHEDULER) {
1202                                 yyerror("scheduler cannot be respecified");
1203                                 YYERROR;
1204                         }
1205                         queue_opts.marker |= QOM_SCHEDULER;
1206                         queue_opts.scheduler = $1;
1207                 }
1208                 | TBRSIZE number        {
1209                         if (queue_opts.marker & QOM_TBRSIZE) {
1210                                 yyerror("tbrsize cannot be respecified");
1211                                 YYERROR;
1212                         }
1213                         if ($2 > 65535) {
1214                                 yyerror("tbrsize too big: max 65535");
1215                                 YYERROR;
1216                         }
1217                         queue_opts.marker |= QOM_TBRSIZE;
1218                         queue_opts.tbrsize = $2;
1219                 }
1220                 ;
1221
1222 bandwidth       : STRING {
1223                         double   bps;
1224                         char    *cp;
1225
1226                         $$.bw_percent = 0;
1227
1228                         bps = strtod($1, &cp);
1229                         if (cp != NULL) {
1230                                 if (!strcmp(cp, "b"))
1231                                         ; /* nothing */
1232                                 else if (!strcmp(cp, "Kb"))
1233                                         bps *= 1000;
1234                                 else if (!strcmp(cp, "Mb"))
1235                                         bps *= 1000 * 1000;
1236                                 else if (!strcmp(cp, "Gb"))
1237                                         bps *= 1000 * 1000 * 1000;
1238                                 else if (!strcmp(cp, "%")) {
1239                                         if (bps < 0 || bps > 100) {
1240                                                 yyerror("bandwidth spec "
1241                                                     "out of range");
1242                                                 free($1);
1243                                                 YYERROR;
1244                                         }
1245                                         $$.bw_percent = bps;
1246                                         bps = 0;
1247                                 } else {
1248                                         yyerror("unknown unit %s", cp);
1249                                         free($1);
1250                                         YYERROR;
1251                                 }
1252                         }
1253                         free($1);
1254                         $$.bw_absolute = (u_int32_t)bps;
1255                 }
1256                 ;
1257
1258 scheduler       : CBQ                           {
1259                         $$.qtype = ALTQT_CBQ;
1260                         $$.data.cbq_opts.flags = 0;
1261                 }
1262                 | CBQ '(' cbqflags_list ')'     {
1263                         $$.qtype = ALTQT_CBQ;
1264                         $$.data.cbq_opts.flags = $3;
1265                 }
1266                 | PRIQ                          {
1267                         $$.qtype = ALTQT_PRIQ;
1268                         $$.data.priq_opts.flags = 0;
1269                 }
1270                 | PRIQ '(' priqflags_list ')'   {
1271                         $$.qtype = ALTQT_PRIQ;
1272                         $$.data.priq_opts.flags = $3;
1273                 }
1274                 | HFSC                          {
1275                         $$.qtype = ALTQT_HFSC;
1276                         bzero(&$$.data.hfsc_opts,
1277                             sizeof(struct node_hfsc_opts));
1278                 }
1279                 | HFSC '(' hfsc_opts ')'        {
1280                         $$.qtype = ALTQT_HFSC;
1281                         $$.data.hfsc_opts = $3;
1282                 }
1283                 ;
1284
1285 cbqflags_list   : cbqflags_item                         { $$ |= $1; }
1286                 | cbqflags_list comma cbqflags_item     { $$ |= $3; }
1287                 ;
1288
1289 cbqflags_item   : STRING        {
1290                         if (!strcmp($1, "default"))
1291                                 $$ = CBQCLF_DEFCLASS;
1292                         else if (!strcmp($1, "borrow"))
1293                                 $$ = CBQCLF_BORROW;
1294                         else if (!strcmp($1, "red"))
1295                                 $$ = CBQCLF_RED;
1296                         else if (!strcmp($1, "ecn"))
1297                                 $$ = CBQCLF_RED|CBQCLF_ECN;
1298                         else if (!strcmp($1, "rio"))
1299                                 $$ = CBQCLF_RIO;
1300                         else {
1301                                 yyerror("unknown cbq flag \"%s\"", $1);
1302                                 free($1);
1303                                 YYERROR;
1304                         }
1305                         free($1);
1306                 }
1307                 ;
1308
1309 priqflags_list  : priqflags_item                        { $$ |= $1; }
1310                 | priqflags_list comma priqflags_item   { $$ |= $3; }
1311                 ;
1312
1313 priqflags_item  : STRING        {
1314                         if (!strcmp($1, "default"))
1315                                 $$ = PRCF_DEFAULTCLASS;
1316                         else if (!strcmp($1, "red"))
1317                                 $$ = PRCF_RED;
1318                         else if (!strcmp($1, "ecn"))
1319                                 $$ = PRCF_RED|PRCF_ECN;
1320                         else if (!strcmp($1, "rio"))
1321                                 $$ = PRCF_RIO;
1322                         else {
1323                                 yyerror("unknown priq flag \"%s\"", $1);
1324                                 free($1);
1325                                 YYERROR;
1326                         }
1327                         free($1);
1328                 }
1329                 ;
1330
1331 hfsc_opts       :       {
1332                                 bzero(&hfsc_opts,
1333                                     sizeof(struct node_hfsc_opts));
1334                         }
1335                     hfscopts_list                               {
1336                         $$ = hfsc_opts;
1337                 }
1338                 ;
1339
1340 hfscopts_list   : hfscopts_item
1341                 | hfscopts_list comma hfscopts_item
1342                 ;
1343
1344 hfscopts_item   : LINKSHARE bandwidth                           {
1345                         if (hfsc_opts.linkshare.used) {
1346                                 yyerror("linkshare already specified");
1347                                 YYERROR;
1348                         }
1349                         hfsc_opts.linkshare.m2 = $2;
1350                         hfsc_opts.linkshare.used = 1;
1351                 }
1352                 | LINKSHARE '(' bandwidth number bandwidth ')'  {
1353                         if (hfsc_opts.linkshare.used) {
1354                                 yyerror("linkshare already specified");
1355                                 YYERROR;
1356                         }
1357                         hfsc_opts.linkshare.m1 = $3;
1358                         hfsc_opts.linkshare.d = $4;
1359                         hfsc_opts.linkshare.m2 = $5;
1360                         hfsc_opts.linkshare.used = 1;
1361                 }
1362                 | REALTIME bandwidth                            {
1363                         if (hfsc_opts.realtime.used) {
1364                                 yyerror("realtime already specified");
1365                                 YYERROR;
1366                         }
1367                         hfsc_opts.realtime.m2 = $2;
1368                         hfsc_opts.realtime.used = 1;
1369                 }
1370                 | REALTIME '(' bandwidth number bandwidth ')'   {
1371                         if (hfsc_opts.realtime.used) {
1372                                 yyerror("realtime already specified");
1373                                 YYERROR;
1374                         }
1375                         hfsc_opts.realtime.m1 = $3;
1376                         hfsc_opts.realtime.d = $4;
1377                         hfsc_opts.realtime.m2 = $5;
1378                         hfsc_opts.realtime.used = 1;
1379                 }
1380                 | UPPERLIMIT bandwidth                          {
1381                         if (hfsc_opts.upperlimit.used) {
1382                                 yyerror("upperlimit already specified");
1383                                 YYERROR;
1384                         }
1385                         hfsc_opts.upperlimit.m2 = $2;
1386                         hfsc_opts.upperlimit.used = 1;
1387                 }
1388                 | UPPERLIMIT '(' bandwidth number bandwidth ')' {
1389                         if (hfsc_opts.upperlimit.used) {
1390                                 yyerror("upperlimit already specified");
1391                                 YYERROR;
1392                         }
1393                         hfsc_opts.upperlimit.m1 = $3;
1394                         hfsc_opts.upperlimit.d = $4;
1395                         hfsc_opts.upperlimit.m2 = $5;
1396                         hfsc_opts.upperlimit.used = 1;
1397                 }
1398                 | STRING        {
1399                         if (!strcmp($1, "default"))
1400                                 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1401                         else if (!strcmp($1, "red"))
1402                                 hfsc_opts.flags |= HFCF_RED;
1403                         else if (!strcmp($1, "ecn"))
1404                                 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1405                         else if (!strcmp($1, "rio"))
1406                                 hfsc_opts.flags |= HFCF_RIO;
1407                         else {
1408                                 yyerror("unknown hfsc flag \"%s\"", $1);
1409                                 free($1);
1410                                 YYERROR;
1411                         }
1412                         free($1);
1413                 }
1414                 ;
1415
1416 qassign         : /* empty */           { $$ = NULL; }
1417                 | qassign_item          { $$ = $1; }
1418                 | '{' qassign_list '}'  { $$ = $2; }
1419                 ;
1420
1421 qassign_list    : qassign_item                  { $$ = $1; }
1422                 | qassign_list comma qassign_item       {
1423                         $1->tail->next = $3;
1424                         $1->tail = $3;
1425                         $$ = $1;
1426                 }
1427                 ;
1428
1429 qassign_item    : STRING                        {
1430                         $$ = calloc(1, sizeof(struct node_queue));
1431                         if ($$ == NULL)
1432                                 err(1, "qassign_item: calloc");
1433                         if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
1434                             sizeof($$->queue)) {
1435                                 yyerror("queue name '%s' too long (max "
1436                                     "%d chars)", $1, sizeof($$->queue)-1);
1437                                 free($1);
1438                                 free($$);
1439                                 YYERROR;
1440                         }
1441                         free($1);
1442                         $$->next = NULL;
1443                         $$->tail = $$;
1444                 }
1445                 ;
1446
1447 pfrule          : action dir logquick interface route af proto fromto
1448                     filter_opts
1449                 {
1450                         struct pf_rule           r;
1451                         struct node_state_opt   *o;
1452                         struct node_proto       *proto;
1453                         int                      srctrack = 0;
1454                         int                      statelock = 0;
1455
1456                         if (check_rulestate(PFCTL_STATE_FILTER))
1457                                 YYERROR;
1458
1459                         memset(&r, 0, sizeof(r));
1460
1461                         r.action = $1.b1;
1462                         switch ($1.b2) {
1463                         case PFRULE_RETURNRST:
1464                                 r.rule_flag |= PFRULE_RETURNRST;
1465                                 r.return_ttl = $1.w;
1466                                 break;
1467                         case PFRULE_RETURNICMP:
1468                                 r.rule_flag |= PFRULE_RETURNICMP;
1469                                 r.return_icmp = $1.w;
1470                                 r.return_icmp6 = $1.w2;
1471                                 break;
1472                         case PFRULE_RETURN:
1473                                 r.rule_flag |= PFRULE_RETURN;
1474                                 r.return_icmp = $1.w;
1475                                 r.return_icmp6 = $1.w2;
1476                                 break;
1477                         }
1478                         r.direction = $2;
1479                         r.log = $3.log;
1480                         r.quick = $3.quick;
1481
1482                         r.af = $6;
1483                         if ($9.tag)
1484                                 if (strlcpy(r.tagname, $9.tag,
1485                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1486                                         yyerror("tag too long, max %u chars",
1487                                             PF_TAG_NAME_SIZE - 1);
1488                                         YYERROR;
1489                                 }
1490                         if ($9.match_tag)
1491                                 if (strlcpy(r.match_tagname, $9.match_tag,
1492                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1493                                         yyerror("tag too long, max %u chars",
1494                                             PF_TAG_NAME_SIZE - 1);
1495                                         YYERROR;
1496                                 }
1497                         r.match_tag_not = $9.match_tag_not;
1498                         r.flags = $9.flags.b1;
1499                         r.flagset = $9.flags.b2;
1500                         if (rule_label(&r, $9.label))
1501                                 YYERROR;
1502                         free($9.label);
1503                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
1504                                 for (proto = $7; proto != NULL &&
1505                                     proto->proto != IPPROTO_TCP;
1506                                     proto = proto->next)
1507                                         ;       /* nothing */
1508                                 if (proto == NULL && $7 != NULL) {
1509                                         if ($9.flags.b1 || $9.flags.b2)
1510                                                 yyerror(
1511                                                     "flags only apply to tcp");
1512                                         if ($8.src_os)
1513                                                 yyerror(
1514                                                     "OS fingerprinting only "
1515                                                     "apply to tcp");
1516                                         YYERROR;
1517                                 }
1518 #if 0
1519                                 if (($9.flags.b1 & parse_flags("S")) == 0 &&
1520                                     $8.src_os) {
1521                                         yyerror("OS fingerprinting requires "
1522                                             "the SYN TCP flag (flags S/SA)");
1523                                         YYERROR;
1524                                 }
1525 #endif
1526                         }
1527
1528                         r.tos = $9.tos;
1529                         r.keep_state = $9.keep.action;
1530                         o = $9.keep.options;
1531                         while (o) {
1532                                 struct node_state_opt   *p = o;
1533
1534                                 switch (o->type) {
1535                                 case PF_STATE_OPT_MAX:
1536                                         if (r.max_states) {
1537                                                 yyerror("state option 'max' "
1538                                                     "multiple definitions");
1539                                                 YYERROR;
1540                                         }
1541                                         r.max_states = o->data.max_states;
1542                                         break;
1543                                 case PF_STATE_OPT_NOSYNC:
1544                                         if (r.rule_flag & PFRULE_NOSYNC) {
1545                                                 yyerror("state option 'sync' "
1546                                                     "multiple definitions");
1547                                                 YYERROR;
1548                                         }
1549                                         r.rule_flag |= PFRULE_NOSYNC;
1550                                         break;
1551                                 case PF_STATE_OPT_SRCTRACK:
1552                                         if (srctrack) {
1553                                                 yyerror("state option "
1554                                                     "'source-track' "
1555                                                     "multiple definitions");
1556                                                 YYERROR;
1557                                         }
1558                                         srctrack =  o->data.src_track;
1559                                         break;
1560                                 case PF_STATE_OPT_MAX_SRC_STATES:
1561                                         if (r.max_src_states) {
1562                                                 yyerror("state option "
1563                                                     "'max-src-states' "
1564                                                     "multiple definitions");
1565                                                 YYERROR;
1566                                         }
1567                                         if (o->data.max_src_nodes == 0) {
1568                                                 yyerror("'max-src-states' must "
1569                                                     "be > 0");
1570                                                 YYERROR;
1571                                         }
1572                                         r.max_src_states =
1573                                             o->data.max_src_states;
1574                                         r.rule_flag |= PFRULE_SRCTRACK;
1575                                         break;
1576                                 case PF_STATE_OPT_MAX_SRC_NODES:
1577                                         if (r.max_src_nodes) {
1578                                                 yyerror("state option "
1579                                                     "'max-src-nodes' "
1580                                                     "multiple definitions");
1581                                                 YYERROR;
1582                                         }
1583                                         if (o->data.max_src_nodes == 0) {
1584                                                 yyerror("'max-src-nodes' must "
1585                                                     "be > 0");
1586                                                 YYERROR;
1587                                         }
1588                                         r.max_src_nodes =
1589                                             o->data.max_src_nodes;
1590                                         r.rule_flag |= PFRULE_SRCTRACK |
1591                                             PFRULE_RULESRCTRACK;
1592                                         break;
1593                                 case PF_STATE_OPT_STATELOCK:
1594                                         if (statelock) {
1595                                                 yyerror("state locking option: "
1596                                                     "multiple definitions");
1597                                                 YYERROR;
1598                                         }
1599                                         statelock = 1;
1600                                         r.rule_flag |= o->data.statelock;
1601                                         break;
1602                                 case PF_STATE_OPT_TIMEOUT:
1603                                         if (r.timeout[o->data.timeout.number]) {
1604                                                 yyerror("state timeout %s "
1605                                                     "multiple definitions",
1606                                                     pf_timeouts[o->data.
1607                                                     timeout.number].name);
1608                                                 YYERROR;
1609                                         }
1610                                         r.timeout[o->data.timeout.number] =
1611                                             o->data.timeout.seconds;
1612                                 }
1613                                 o = o->next;
1614                                 free(p);
1615                         }
1616                         if (srctrack) {
1617                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
1618                                     r.max_src_nodes) {
1619                                         yyerror("'max-src-nodes' is "
1620                                             "incompatible with "
1621                                             "'source-track global'");
1622                                         YYERROR;
1623                                 }
1624                                 r.rule_flag |= PFRULE_SRCTRACK;
1625                                 if (srctrack == PF_SRCTRACK_RULE)
1626                                         r.rule_flag |= PFRULE_RULESRCTRACK;
1627                         }
1628                         if (r.keep_state && !statelock)
1629                                 r.rule_flag |= default_statelock;
1630
1631                         if ($9.fragment)
1632                                 r.rule_flag |= PFRULE_FRAGMENT;
1633                         r.allow_opts = $9.allowopts;
1634
1635                         decide_address_family($8.src.host, &r.af);
1636                         decide_address_family($8.dst.host, &r.af);
1637
1638                         if ($5.rt) {
1639                                 if (!r.direction) {
1640                                         yyerror("direction must be explicit "
1641                                             "with rules that specify routing");
1642                                         YYERROR;
1643                                 }
1644                                 r.rt = $5.rt;
1645                                 r.rpool.opts = $5.pool_opts;
1646                                 if ($5.key != NULL)
1647                                         memcpy(&r.rpool.key, $5.key,
1648                                             sizeof(struct pf_poolhashkey));
1649                         }
1650                         if (r.rt && r.rt != PF_FASTROUTE) {
1651                                 decide_address_family($5.host, &r.af);
1652                                 remove_invalid_hosts(&$5.host, &r.af);
1653                                 if ($5.host == NULL) {
1654                                         yyerror("no routing address with "
1655                                             "matching address family found.");
1656                                         YYERROR;
1657                                 }
1658                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
1659                                     PF_POOL_NONE && ($5.host->next != NULL ||
1660                                     $5.host->addr.type == PF_ADDR_TABLE ||
1661                                     DYNIF_MULTIADDR($5.host->addr)))
1662                                         r.rpool.opts |= PF_POOL_ROUNDROBIN;
1663                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
1664                                     PF_POOL_ROUNDROBIN &&
1665                                     disallow_table($5.host, "tables are only "
1666                                     "supported in round-robin routing pools"))
1667                                         YYERROR;
1668                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
1669                                     PF_POOL_ROUNDROBIN &&
1670                                     disallow_alias($5.host, "interface (%s) "
1671                                     "is only supported in round-robin "
1672                                     "routing pools"))
1673                                         YYERROR;
1674                                 if ($5.host->next != NULL) {
1675                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
1676                                             PF_POOL_ROUNDROBIN) {
1677                                                 yyerror("r.rpool.opts must "
1678                                                     "be PF_POOL_ROUNDROBIN");
1679                                                 YYERROR;
1680                                         }
1681                                 }
1682                         }
1683                         if ($9.queues.qname != NULL) {
1684                                 if (strlcpy(r.qname, $9.queues.qname,
1685                                     sizeof(r.qname)) >= sizeof(r.qname)) {
1686                                         yyerror("rule qname too long (max "
1687                                             "%d chars)", sizeof(r.qname)-1);
1688                                         YYERROR;
1689                                 }
1690                                 free($9.queues.qname);
1691                         }
1692                         if ($9.queues.pqname != NULL) {
1693                                 if (strlcpy(r.pqname, $9.queues.pqname,
1694                                     sizeof(r.pqname)) >= sizeof(r.pqname)) {
1695                                         yyerror("rule pqname too long (max "
1696                                             "%d chars)", sizeof(r.pqname)-1);
1697                                         YYERROR;
1698                                 }
1699                                 free($9.queues.pqname);
1700                         }
1701
1702                         expand_rule(&r, $4, $5.host, $7, $8.src_os,
1703                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
1704                             $9.uid, $9.gid, $9.icmpspec);
1705                 }
1706                 ;
1707
1708 filter_opts     :       { bzero(&filter_opts, sizeof filter_opts); }
1709                     filter_opts_l
1710                         { $$ = filter_opts; }
1711                 | /* empty */   {
1712                         bzero(&filter_opts, sizeof filter_opts);
1713                         $$ = filter_opts;
1714                 }
1715                 ;
1716
1717 filter_opts_l   : filter_opts_l filter_opt
1718                 | filter_opt
1719                 ;
1720
1721 filter_opt      : USER uids {
1722                         if (filter_opts.uid)
1723                                 $2->tail->next = filter_opts.uid;
1724                         filter_opts.uid = $2;
1725                 }
1726                 | GROUP gids {
1727                         if (filter_opts.gid)
1728                                 $2->tail->next = filter_opts.gid;
1729                         filter_opts.gid = $2;
1730                 }
1731                 | flags {
1732                         if (filter_opts.marker & FOM_FLAGS) {
1733                                 yyerror("flags cannot be redefined");
1734                                 YYERROR;
1735                         }
1736                         filter_opts.marker |= FOM_FLAGS;
1737                         filter_opts.flags.b1 |= $1.b1;
1738                         filter_opts.flags.b2 |= $1.b2;
1739                         filter_opts.flags.w |= $1.w;
1740                         filter_opts.flags.w2 |= $1.w2;
1741                 }
1742                 | icmpspec {
1743                         if (filter_opts.marker & FOM_ICMP) {
1744                                 yyerror("icmp-type cannot be redefined");
1745                                 YYERROR;
1746                         }
1747                         filter_opts.marker |= FOM_ICMP;
1748                         filter_opts.icmpspec = $1;
1749                 }
1750                 | tos {
1751                         if (filter_opts.marker & FOM_TOS) {
1752                                 yyerror("tos cannot be redefined");
1753                                 YYERROR;
1754                         }
1755                         filter_opts.marker |= FOM_TOS;
1756                         filter_opts.tos = $1;
1757                 }
1758                 | keep {
1759                         if (filter_opts.marker & FOM_KEEP) {
1760                                 yyerror("modulate or keep cannot be redefined");
1761                                 YYERROR;
1762                         }
1763                         filter_opts.marker |= FOM_KEEP;
1764                         filter_opts.keep.action = $1.action;
1765                         filter_opts.keep.options = $1.options;
1766                 }
1767                 | FRAGMENT {
1768                         filter_opts.fragment = 1;
1769                 }
1770                 | ALLOWOPTS {
1771                         filter_opts.allowopts = 1;
1772                 }
1773                 | label {
1774                         if (filter_opts.label) {
1775                                 yyerror("label cannot be redefined");
1776                                 YYERROR;
1777                         }
1778                         filter_opts.label = $1;
1779                 }
1780                 | qname {
1781                         if (filter_opts.queues.qname) {
1782                                 yyerror("queue cannot be redefined");
1783                                 YYERROR;
1784                         }
1785                         filter_opts.queues = $1;
1786                 }
1787                 | TAG string                            {
1788                         filter_opts.tag = $2;
1789                 }
1790                 | not TAGGED string                     {
1791                         filter_opts.match_tag = $3;
1792                         filter_opts.match_tag_not = $1;
1793                 }
1794                 ;
1795
1796 action          : PASS                  { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
1797                 | BLOCK blockspec       { $$ = $2; $$.b1 = PF_DROP; }
1798                 ;
1799
1800 blockspec       : /* empty */           {
1801                         $$.b2 = blockpolicy;
1802                         $$.w = returnicmpdefault;
1803                         $$.w2 = returnicmp6default;
1804                 }
1805                 | DROP                  {
1806                         $$.b2 = PFRULE_DROP;
1807                         $$.w = 0;
1808                         $$.w2 = 0;
1809                 }
1810                 | RETURNRST             {
1811                         $$.b2 = PFRULE_RETURNRST;
1812                         $$.w = 0;
1813                         $$.w2 = 0;
1814                 }
1815                 | RETURNRST '(' TTL number ')'  {
1816                         if ($4 > 255) {
1817                                 yyerror("illegal ttl value %d", $4);
1818                                 YYERROR;
1819                         }
1820                         $$.b2 = PFRULE_RETURNRST;
1821                         $$.w = $4;
1822                         $$.w2 = 0;
1823                 }
1824                 | RETURNICMP            {
1825                         $$.b2 = PFRULE_RETURNICMP;
1826                         $$.w = returnicmpdefault;
1827                         $$.w2 = returnicmp6default;
1828                 }
1829                 | RETURNICMP6           {
1830                         $$.b2 = PFRULE_RETURNICMP;
1831                         $$.w = returnicmpdefault;
1832                         $$.w2 = returnicmp6default;
1833                 }
1834                 | RETURNICMP '(' STRING ')'     {
1835                         $$.b2 = PFRULE_RETURNICMP;
1836                         if (!($$.w = parseicmpspec($3, AF_INET))) {
1837                                 free($3);
1838                                 YYERROR;
1839                         }
1840                         free($3);
1841                         $$.w2 = returnicmp6default;
1842                 }
1843                 | RETURNICMP6 '(' STRING ')'    {
1844                         $$.b2 = PFRULE_RETURNICMP;
1845                         $$.w = returnicmpdefault;
1846                         if (!($$.w2 = parseicmpspec($3, AF_INET6))) {
1847                                 free($3);
1848                                 YYERROR;
1849                         }
1850                         free($3);
1851                 }
1852                 | RETURNICMP '(' STRING comma STRING ')' {
1853                         $$.b2 = PFRULE_RETURNICMP;
1854                         if (!($$.w = parseicmpspec($3, AF_INET)) ||
1855                             !($$.w2 = parseicmpspec($5, AF_INET6))) {
1856                                 free($3);
1857                                 free($5);
1858                                 YYERROR;
1859                         }
1860                         free($3);
1861                         free($5);
1862                 }
1863                 | RETURN {
1864                         $$.b2 = PFRULE_RETURN;
1865                         $$.w = returnicmpdefault;
1866                         $$.w2 = returnicmp6default;
1867                 }
1868                 ;
1869
1870 dir             : /* empty */                   { $$ = 0; }
1871                 | IN                            { $$ = PF_IN; }
1872                 | OUT                           { $$ = PF_OUT; }
1873                 ;
1874
1875 logquick        : /* empty */                   { $$.log = 0; $$.quick = 0; }
1876                 | log                           { $$.log = $1; $$.quick = 0; }
1877                 | QUICK                         { $$.log = 0; $$.quick = 1; }
1878                 | log QUICK                     { $$.log = $1; $$.quick = 1; }
1879                 | QUICK log                     { $$.log = $2; $$.quick = 1; }
1880                 ;
1881
1882 log             : LOG                           { $$ = 1; }
1883                 | LOGALL                        { $$ = 2; }
1884                 ;
1885
1886 interface       : /* empty */                   { $$ = NULL; }
1887                 | ON if_item_not                { $$ = $2; }
1888                 | ON '{' if_list '}'            { $$ = $3; }
1889                 ;
1890
1891 if_list         : if_item_not                   { $$ = $1; }
1892                 | if_list comma if_item_not     {
1893                         $1->tail->next = $3;
1894                         $1->tail = $3;
1895                         $$ = $1;
1896                 }
1897                 ;
1898
1899 if_item_not     : not if_item                   { $$ = $2; $$->not = $1; }
1900                 ;
1901
1902 if_item         : STRING                        {
1903                         struct node_host        *n;
1904
1905                         if ((n = ifa_exists($1, 1)) == NULL) {
1906                                 yyerror("unknown interface %s", $1);
1907                                 free($1);
1908                                 YYERROR;
1909                         }
1910                         $$ = calloc(1, sizeof(struct node_if));
1911                         if ($$ == NULL)
1912                                 err(1, "if_item: calloc");
1913                         if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
1914                             sizeof($$->ifname)) {
1915                                 free($1);
1916                                 free($$);
1917                                 yyerror("interface name too long");
1918                                 YYERROR;
1919                         }
1920                         free($1);
1921                         $$->ifa_flags = n->ifa_flags;
1922                         $$->not = 0;
1923                         $$->next = NULL;
1924                         $$->tail = $$;
1925                 }
1926                 ;
1927
1928 af              : /* empty */                   { $$ = 0; }
1929                 | INET                          { $$ = AF_INET; }
1930                 | INET6                         { $$ = AF_INET6; }
1931                 ;
1932
1933 proto           : /* empty */                   { $$ = NULL; }
1934                 | PROTO proto_item              { $$ = $2; }
1935                 | PROTO '{' proto_list '}'      { $$ = $3; }
1936                 ;
1937
1938 proto_list      : proto_item                    { $$ = $1; }
1939                 | proto_list comma proto_item   {
1940                         $1->tail->next = $3;
1941                         $1->tail = $3;
1942                         $$ = $1;
1943                 }
1944                 ;
1945
1946 proto_item      : STRING                        {
1947                         u_int8_t        pr;
1948                         u_long          ulval;
1949
1950                         if (atoul($1, &ulval) == 0) {
1951                                 if (ulval > 255) {
1952                                         yyerror("protocol outside range");
1953                                         free($1);
1954                                         YYERROR;
1955                                 }
1956                                 pr = (u_int8_t)ulval;
1957                         } else {
1958                                 struct protoent *p;
1959
1960                                 p = getprotobyname($1);
1961                                 if (p == NULL) {
1962                                         yyerror("unknown protocol %s", $1);
1963                                         free($1);
1964                                         YYERROR;
1965                                 }
1966                                 pr = p->p_proto;
1967                         }
1968                         free($1);
1969                         if (pr == 0) {
1970                                 yyerror("proto 0 cannot be used");
1971                                 YYERROR;
1972                         }
1973                         $$ = calloc(1, sizeof(struct node_proto));
1974                         if ($$ == NULL)
1975                                 err(1, "proto_item: calloc");
1976                         $$->proto = pr;
1977                         $$->next = NULL;
1978                         $$->tail = $$;
1979                 }
1980                 ;
1981
1982 fromto          : ALL                           {
1983                         $$.src.host = NULL;
1984                         $$.src.port = NULL;
1985                         $$.dst.host = NULL;
1986                         $$.dst.port = NULL;
1987                         $$.src_os = NULL;
1988                 }
1989                 | from os to                    {
1990                         $$.src = $1;
1991                         $$.src_os = $2;
1992                         $$.dst = $3;
1993                 }
1994                 ;
1995
1996 os              : /* empty */                   { $$ = NULL; }
1997                 | OS xos                        { $$ = $2; }
1998                 | OS '{' os_list '}'            { $$ = $3; }
1999                 ;
2000
2001 xos             : STRING {
2002                         $$ = calloc(1, sizeof(struct node_os));
2003                         if ($$ == NULL)
2004                                 err(1, "os: calloc");
2005                         $$->os = $1;
2006                         $$->tail = $$;
2007                 }
2008                 ;
2009
2010 os_list         : xos                           { $$ = $1; }
2011                 | os_list comma xos             {
2012                         $1->tail->next = $3;
2013                         $1->tail = $3;
2014                         $$ = $1;
2015                 }
2016                 ;
2017
2018 from            : /* empty */                   {
2019                         $$.host = NULL;
2020                         $$.port = NULL;
2021                 }
2022                 | FROM ipportspec               {
2023                         $$ = $2;
2024                 }
2025                 ;
2026
2027 to              : /* empty */                   {
2028                         $$.host = NULL;
2029                         $$.port = NULL;
2030                 }
2031                 | TO ipportspec         {
2032                         $$ = $2;
2033                 }
2034                 ;
2035
2036 ipportspec      : ipspec                        {
2037                         $$.host = $1;
2038                         $$.port = NULL;
2039                 }
2040                 | ipspec PORT portspec          {
2041                         $$.host = $1;
2042                         $$.port = $3;
2043                 }
2044                 | PORT portspec                 {
2045                         $$.host = NULL;
2046                         $$.port = $2;
2047                 }
2048                 ;
2049
2050 ipspec          : ANY                           { $$ = NULL; }
2051                 | xhost                         { $$ = $1; }
2052                 | '{' host_list '}'             { $$ = $2; }
2053                 ;
2054
2055 host_list       : xhost                         { $$ = $1; }
2056                 | host_list comma xhost         {
2057                         if ($3 == NULL)
2058                                 $$ = $1;
2059                         else if ($1 == NULL)
2060                                 $$ = $3;
2061                         else {
2062                                 $1->tail->next = $3;
2063                                 $1->tail = $3->tail;
2064                                 $$ = $1;
2065                         }
2066                 }
2067                 ;
2068
2069 xhost           : not host                      {
2070                         struct node_host        *n;
2071
2072                         for (n = $2; n != NULL; n = n->next)
2073                                 n->not = $1;
2074                         $$ = $2;
2075                 }
2076                 | NOROUTE                       {
2077                         $$ = calloc(1, sizeof(struct node_host));
2078                         if ($$ == NULL)
2079                                 err(1, "xhost: calloc");
2080                         $$->addr.type = PF_ADDR_NOROUTE;
2081                         $$->next = NULL;
2082                         $$->tail = $$;
2083                 }
2084                 ;
2085
2086 host            : STRING                        {
2087                         if (($$ = host($1)) == NULL)    {
2088                                 /* error. "any" is handled elsewhere */
2089                                 free($1);
2090                                 yyerror("could not parse host specification");
2091                                 YYERROR;
2092                         }
2093                         free($1);
2094
2095                 }
2096                 | STRING '/' number             {
2097                         char    *buf;
2098
2099                         if (asprintf(&buf, "%s/%u", $1, $3) == -1)
2100                                 err(1, "host: asprintf");
2101                         free($1);
2102                         if (($$ = host(buf)) == NULL)   {
2103                                 /* error. "any" is handled elsewhere */
2104                                 free(buf);
2105                                 yyerror("could not parse host specification");
2106                                 YYERROR;
2107                         }
2108                         free(buf);
2109                 }
2110                 | dynaddr
2111                 | dynaddr '/' number            {
2112                         struct node_host        *n;
2113
2114                         $$ = $1;
2115                         for (n = $1; n != NULL; n = n->next)
2116                                 set_ipmask(n, $3);
2117                 }
2118                 | '<' STRING '>'        {
2119                         if (strlen($2) >= PF_TABLE_NAME_SIZE) {
2120                                 yyerror("table name '%s' too long", $2);
2121                                 free($2);
2122                                 YYERROR;
2123                         }
2124                         $$ = calloc(1, sizeof(struct node_host));
2125                         if ($$ == NULL)
2126                                 err(1, "host: calloc");
2127                         $$->addr.type = PF_ADDR_TABLE;
2128                         if (strlcpy($$->addr.v.tblname, $2,
2129                             sizeof($$->addr.v.tblname)) >=
2130                             sizeof($$->addr.v.tblname))
2131                                 errx(1, "host: strlcpy");
2132                         free($2);
2133                         $$->next = NULL;
2134                         $$->tail = $$;
2135                 }
2136                 ;
2137
2138 number          : STRING                        {
2139                         u_long  ulval;
2140
2141                         if (atoul($1, &ulval) == -1) {
2142                                 yyerror("%s is not a number", $1);
2143                                 free($1);
2144                                 YYERROR;
2145                         } else
2146                                 $$ = ulval;
2147                         free($1);
2148                 }
2149                 ;
2150
2151 dynaddr         : '(' STRING ')'                {
2152                         int      flags = 0;
2153                         char    *p, *op;
2154
2155                         op = $2;
2156                         while ((p = strrchr($2, ':')) != NULL) {
2157                                 if (!strcmp(p+1, "network"))
2158                                         flags |= PFI_AFLAG_NETWORK;
2159                                 else if (!strcmp(p+1, "broadcast"))
2160                                         flags |= PFI_AFLAG_BROADCAST;
2161                                 else if (!strcmp(p+1, "peer"))
2162                                         flags |= PFI_AFLAG_PEER;
2163                                 else if (!strcmp(p+1, "0"))
2164                                         flags |= PFI_AFLAG_NOALIAS;
2165                                 else {
2166                                         yyerror("interface %s has bad modifier",
2167                                             $2);
2168                                         free(op);
2169                                         YYERROR;
2170                                 }
2171                                 *p = '\0';
2172                         }
2173                         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
2174                                 free(op);
2175                                 yyerror("illegal combination of "
2176                                     "interface modifiers");
2177                                 YYERROR;
2178                         }
2179                         if (ifa_exists($2, 1) == NULL && strcmp($2, "self")) {
2180                                 yyerror("interface %s does not exist", $2);
2181                                 free(op);
2182                                 YYERROR;
2183                         }
2184                         $$ = calloc(1, sizeof(struct node_host));
2185                         if ($$ == NULL)
2186                                 err(1, "address: calloc");
2187                         $$->af = 0;
2188                         set_ipmask($$, 128);
2189                         $$->addr.type = PF_ADDR_DYNIFTL;
2190                         $$->addr.iflags = flags;
2191                         if (strlcpy($$->addr.v.ifname, $2,
2192                             sizeof($$->addr.v.ifname)) >=
2193                             sizeof($$->addr.v.ifname)) {
2194                                 free(op);
2195                                 free($$);
2196                                 yyerror("interface name too long");
2197                                 YYERROR;
2198                         }
2199                         free(op);
2200                         $$->next = NULL;
2201                         $$->tail = $$;
2202                 }
2203                 ;
2204
2205 portspec        : port_item                     { $$ = $1; }
2206                 | '{' port_list '}'             { $$ = $2; }
2207                 ;
2208
2209 port_list       : port_item                     { $$ = $1; }
2210                 | port_list comma port_item     {
2211                         $1->tail->next = $3;
2212                         $1->tail = $3;
2213                         $$ = $1;
2214                 }
2215                 ;
2216
2217 port_item       : port                          {
2218                         $$ = calloc(1, sizeof(struct node_port));
2219                         if ($$ == NULL)
2220                                 err(1, "port_item: calloc");
2221                         $$->port[0] = $1.a;
2222                         $$->port[1] = $1.b;
2223                         if ($1.t)
2224                                 $$->op = PF_OP_RRG;
2225                         else
2226                                 $$->op = PF_OP_EQ;
2227                         $$->next = NULL;
2228                         $$->tail = $$;
2229                 }
2230                 | unaryop port          {
2231                         if ($2.t) {
2232                                 yyerror("':' cannot be used with an other "
2233                                     "port operator");
2234                                 YYERROR;
2235                         }
2236                         $$ = calloc(1, sizeof(struct node_port));
2237                         if ($$ == NULL)
2238                                 err(1, "port_item: calloc");
2239                         $$->port[0] = $2.a;
2240                         $$->port[1] = $2.b;
2241                         $$->op = $1;
2242                         $$->next = NULL;
2243                         $$->tail = $$;
2244                 }
2245                 | port PORTBINARY port          {
2246                         if ($1.t || $3.t) {
2247                                 yyerror("':' cannot be used with an other "
2248                                     "port operator");
2249                                 YYERROR;
2250                         }
2251                         $$ = calloc(1, sizeof(struct node_port));
2252                         if ($$ == NULL)
2253                                 err(1, "port_item: calloc");
2254                         $$->port[0] = $1.a;
2255                         $$->port[1] = $3.a;
2256                         $$->op = $2;
2257                         $$->next = NULL;
2258                         $$->tail = $$;
2259                 }
2260                 ;
2261
2262 port            : STRING                        {
2263                         char    *p = strchr($1, ':');
2264                         struct servent  *s = NULL;
2265                         u_long           ulval;
2266
2267                         if (p == NULL) {
2268                                 if (atoul($1, &ulval) == 0) {
2269                                         if (ulval > 65535) {
2270                                                 free($1);
2271                                                 yyerror("illegal port value %d",
2272                                                     ulval);
2273                                                 YYERROR;
2274                                         }
2275                                         $$.a = htons(ulval);
2276                                 } else {
2277                                         s = getservbyname($1, "tcp");
2278                                         if (s == NULL)
2279                                                 s = getservbyname($1, "udp");
2280                                         if (s == NULL) {
2281                                                 yyerror("unknown port %s", $1);
2282                                                 free($1);
2283                                                 YYERROR;
2284                                         }
2285                                         $$.a = s->s_port;
2286                                 }
2287                                 $$.b = 0;
2288                                 $$.t = 0;
2289                         } else {
2290                                 int port[2];
2291
2292                                 *p++ = 0;
2293                                 if ((port[0] = getservice($1)) == -1 ||
2294                                     (port[1] = getservice(p)) == -1) {
2295                                         free($1);
2296                                         YYERROR;
2297                                 }
2298                                 $$.a = port[0];
2299                                 $$.b = port[1];
2300                                 $$.t = PF_OP_RRG;
2301                         }
2302                         free($1);
2303                 }
2304                 ;
2305
2306 uids            : uid_item                      { $$ = $1; }
2307                 | '{' uid_list '}'              { $$ = $2; }
2308                 ;
2309
2310 uid_list        : uid_item                      { $$ = $1; }
2311                 | uid_list comma uid_item       {
2312                         $1->tail->next = $3;
2313                         $1->tail = $3;
2314                         $$ = $1;
2315                 }
2316                 ;
2317
2318 uid_item        : uid                           {
2319                         $$ = calloc(1, sizeof(struct node_uid));
2320                         if ($$ == NULL)
2321                                 err(1, "uid_item: calloc");
2322                         $$->uid[0] = $1;
2323                         $$->uid[1] = $1;
2324                         $$->op = PF_OP_EQ;
2325                         $$->next = NULL;
2326                         $$->tail = $$;
2327                 }
2328                 | unaryop uid                   {
2329                         if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
2330                                 yyerror("user unknown requires operator = or "
2331                                     "!=");
2332                                 YYERROR;
2333                         }
2334                         $$ = calloc(1, sizeof(struct node_uid));
2335                         if ($$ == NULL)
2336                                 err(1, "uid_item: calloc");
2337                         $$->uid[0] = $2;
2338                         $$->uid[1] = $2;
2339                         $$->op = $1;
2340                         $$->next = NULL;
2341                         $$->tail = $$;
2342                 }
2343                 | uid PORTBINARY uid            {
2344                         if ($1 == UID_MAX || $3 == UID_MAX) {
2345                                 yyerror("user unknown requires operator = or "
2346                                     "!=");
2347                                 YYERROR;
2348                         }
2349                         $$ = calloc(1, sizeof(struct node_uid));
2350                         if ($$ == NULL)
2351                                 err(1, "uid_item: calloc");
2352                         $$->uid[0] = $1;
2353                         $$->uid[1] = $3;
2354                         $$->op = $2;
2355                         $$->next = NULL;
2356                         $$->tail = $$;
2357                 }
2358                 ;
2359
2360 uid             : STRING                        {
2361                         u_long  ulval;
2362
2363                         if (atoul($1, &ulval) == -1) {
2364                                 if (!strcmp($1, "unknown"))
2365                                         $$ = UID_MAX;
2366                                 else {
2367                                         struct passwd   *pw;
2368
2369                                         if ((pw = getpwnam($1)) == NULL) {
2370                                                 yyerror("unknown user %s", $1);
2371                                                 free($1);
2372                                                 YYERROR;
2373                                         }
2374                                         $$ = pw->pw_uid;
2375                                 }
2376                         } else {
2377                                 if (ulval >= UID_MAX) {
2378                                         free($1);
2379                                         yyerror("illegal uid value %lu", ulval);
2380                                         YYERROR;
2381                                 }
2382                                 $$ = ulval;
2383                         }
2384                         free($1);
2385                 }
2386                 ;
2387
2388 gids            : gid_item                      { $$ = $1; }
2389                 | '{' gid_list '}'              { $$ = $2; }
2390                 ;
2391
2392 gid_list        : gid_item                      { $$ = $1; }
2393                 | gid_list comma gid_item       {
2394                         $1->tail->next = $3;
2395                         $1->tail = $3;
2396                         $$ = $1;
2397                 }
2398                 ;
2399
2400 gid_item        : gid                           {
2401                         $$ = calloc(1, sizeof(struct node_gid));
2402                         if ($$ == NULL)
2403                                 err(1, "gid_item: calloc");
2404                         $$->gid[0] = $1;
2405                         $$->gid[1] = $1;
2406                         $$->op = PF_OP_EQ;
2407                         $$->next = NULL;
2408                         $$->tail = $$;
2409                 }
2410                 | unaryop gid                   {
2411                         if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
2412                                 yyerror("group unknown requires operator = or "
2413                                     "!=");
2414                                 YYERROR;
2415                         }
2416                         $$ = calloc(1, sizeof(struct node_gid));
2417                         if ($$ == NULL)
2418                                 err(1, "gid_item: calloc");
2419                         $$->gid[0] = $2;
2420                         $$->gid[1] = $2;
2421                         $$->op = $1;
2422                         $$->next = NULL;
2423                         $$->tail = $$;
2424                 }
2425                 | gid PORTBINARY gid            {
2426                         if ($1 == GID_MAX || $3 == GID_MAX) {
2427                                 yyerror("group unknown requires operator = or "
2428                                     "!=");
2429                                 YYERROR;
2430                         }
2431                         $$ = calloc(1, sizeof(struct node_gid));
2432                         if ($$ == NULL)
2433                                 err(1, "gid_item: calloc");
2434                         $$->gid[0] = $1;
2435                         $$->gid[1] = $3;
2436                         $$->op = $2;
2437                         $$->next = NULL;
2438                         $$->tail = $$;
2439                 }
2440                 ;
2441
2442 gid             : STRING                        {
2443                         u_long  ulval;
2444
2445                         if (atoul($1, &ulval) == -1) {
2446                                 if (!strcmp($1, "unknown"))
2447                                         $$ = GID_MAX;
2448                                 else {
2449                                         struct group    *grp;
2450
2451                                         if ((grp = getgrnam($1)) == NULL) {
2452                                                 yyerror("unknown group %s", $1);
2453                                                 free($1);
2454                                                 YYERROR;
2455                                         }
2456                                         $$ = grp->gr_gid;
2457                                 }
2458                         } else {
2459                                 if (ulval >= GID_MAX) {
2460                                         yyerror("illegal gid value %lu", ulval);
2461                                         free($1);
2462                                         YYERROR;
2463                                 }
2464                                 $$ = ulval;
2465                         }
2466                         free($1);
2467                 }
2468                 ;
2469
2470 flag            : STRING                        {
2471                         int     f;
2472
2473                         if ((f = parse_flags($1)) < 0) {
2474                                 yyerror("bad flags %s", $1);
2475                                 free($1);
2476                                 YYERROR;
2477                         }
2478                         free($1);
2479                         $$.b1 = f;
2480                 }
2481                 ;
2482
2483 flags           : FLAGS flag '/' flag   { $$.b1 = $2.b1; $$.b2 = $4.b1; }
2484                 | FLAGS '/' flag        { $$.b1 = 0; $$.b2 = $3.b1; }
2485                 ;
2486
2487 icmpspec        : ICMPTYPE icmp_item            { $$ = $2; }
2488                 | ICMPTYPE '{' icmp_list '}'    { $$ = $3; }
2489                 | ICMP6TYPE icmp6_item          { $$ = $2; }
2490                 | ICMP6TYPE '{' icmp6_list '}'  { $$ = $3; }
2491                 ;
2492
2493 icmp_list       : icmp_item                     { $$ = $1; }
2494                 | icmp_list comma icmp_item     {
2495                         $1->tail->next = $3;
2496                         $1->tail = $3;
2497                         $$ = $1;
2498                 }
2499                 ;
2500
2501 icmp6_list      : icmp6_item                    { $$ = $1; }
2502                 | icmp6_list comma icmp6_item   {
2503                         $1->tail->next = $3;
2504                         $1->tail = $3;
2505                         $$ = $1;
2506                 }
2507                 ;
2508
2509 icmp_item       : icmptype              {
2510                         $$ = calloc(1, sizeof(struct node_icmp));
2511                         if ($$ == NULL)
2512                                 err(1, "icmp_item: calloc");
2513                         $$->type = $1;
2514                         $$->code = 0;
2515                         $$->proto = IPPROTO_ICMP;
2516                         $$->next = NULL;
2517                         $$->tail = $$;
2518                 }
2519                 | icmptype CODE STRING  {
2520                         const struct icmpcodeent        *p;
2521                         u_long                           ulval;
2522
2523                         if (atoul($3, &ulval) == 0) {
2524                                 if (ulval > 255) {
2525                                         free($3);
2526                                         yyerror("illegal icmp-code %d", ulval);
2527                                         YYERROR;
2528                                 }
2529                         } else {
2530                                 if ((p = geticmpcodebyname($1-1, $3,
2531                                     AF_INET)) == NULL) {
2532                                         yyerror("unknown icmp-code %s", $3);
2533                                         free($3);
2534                                         YYERROR;
2535                                 }
2536                                 ulval = p->code;
2537                         }
2538                         free($3);
2539                         $$ = calloc(1, sizeof(struct node_icmp));
2540                         if ($$ == NULL)
2541                                 err(1, "icmp_item: calloc");
2542                         $$->type = $1;
2543                         $$->code = ulval + 1;
2544                         $$->proto = IPPROTO_ICMP;
2545                         $$->next = NULL;
2546                         $$->tail = $$;
2547                 }
2548                 ;
2549
2550 icmp6_item      : icmp6type             {
2551                         $$ = calloc(1, sizeof(struct node_icmp));
2552                         if ($$ == NULL)
2553                                 err(1, "icmp_item: calloc");
2554                         $$->type = $1;
2555                         $$->code = 0;
2556                         $$->proto = IPPROTO_ICMPV6;
2557                         $$->next = NULL;
2558                         $$->tail = $$;
2559                 }
2560                 | icmp6type CODE STRING {
2561                         const struct icmpcodeent        *p;
2562                         u_long                           ulval;
2563
2564                         if (atoul($3, &ulval) == 0) {
2565                                 if (ulval > 255) {
2566                                         yyerror("illegal icmp6-code %ld",
2567                                             ulval);
2568                                         free($3);
2569                                         YYERROR;
2570                                 }
2571                         } else {
2572                                 if ((p = geticmpcodebyname($1-1, $3,
2573                                     AF_INET6)) == NULL) {
2574                                         yyerror("unknown icmp6-code %s", $3);
2575                                         free($3);
2576                                         YYERROR;
2577                                 }
2578                                 ulval = p->code;
2579                         }
2580                         free($3);
2581                         $$ = calloc(1, sizeof(struct node_icmp));
2582                         if ($$ == NULL)
2583                                 err(1, "icmp_item: calloc");
2584                         $$->type = $1;
2585                         $$->code = ulval + 1;
2586                         $$->proto = IPPROTO_ICMPV6;
2587                         $$->next = NULL;
2588                         $$->tail = $$;
2589                 }
2590                 ;
2591
2592 icmptype        : STRING                        {
2593                         const struct icmptypeent        *p;
2594                         u_long                           ulval;
2595
2596                         if (atoul($1, &ulval) == 0) {
2597                                 if (ulval > 255) {
2598                                         yyerror("illegal icmp-type %d", ulval);
2599                                         free($1);
2600                                         YYERROR;
2601                                 }
2602                                 $$ = ulval + 1;
2603                         } else {
2604                                 if ((p = geticmptypebyname($1, AF_INET)) ==
2605                                     NULL) {
2606                                         yyerror("unknown icmp-type %s", $1);
2607                                         free($1);
2608                                         YYERROR;
2609                                 }
2610                                 $$ = p->type + 1;
2611                         }
2612                         free($1);
2613                 }
2614                 ;
2615
2616 icmp6type       : STRING                        {
2617                         const struct icmptypeent        *p;
2618                         u_long                           ulval;
2619
2620                         if (atoul($1, &ulval) == 0) {
2621                                 if (ulval > 255) {
2622                                         yyerror("illegal icmp6-type %d", ulval);
2623                                         free($1);
2624                                         YYERROR;
2625                                 }
2626                                 $$ = ulval + 1;
2627                         } else {
2628                                 if ((p = geticmptypebyname($1, AF_INET6)) ==
2629                                     NULL) {
2630                                         yyerror("unknown icmp6-type %s", $1);
2631                                         free($1);
2632                                         YYERROR;
2633                                 }
2634                                 $$ = p->type + 1;
2635                         }
2636                         free($1);
2637                 }
2638                 ;
2639
2640 tos             : TOS STRING                    {
2641                         if (!strcmp($2, "lowdelay"))
2642                                 $$ = IPTOS_LOWDELAY;
2643                         else if (!strcmp($2, "throughput"))
2644                                 $$ = IPTOS_THROUGHPUT;
2645                         else if (!strcmp($2, "reliability"))
2646                                 $$ = IPTOS_RELIABILITY;
2647                         else if ($2[0] == '0' && $2[1] == 'x')
2648                                 $$ = strtoul($2, NULL, 16);
2649                         else
2650                                 $$ = strtoul($2, NULL, 10);
2651                         if (!$$ || $$ > 255) {
2652                                 yyerror("illegal tos value %s", $2);
2653                                 free($2);
2654                                 YYERROR;
2655                         }
2656                         free($2);
2657                 }
2658                 ;
2659
2660 sourcetrack     : SOURCETRACK           { $$ = PF_SRCTRACK; }
2661                 | SOURCETRACK GLOBAL    { $$ = PF_SRCTRACK_GLOBAL; }
2662                 | SOURCETRACK RULE      { $$ = PF_SRCTRACK_RULE; }
2663                 ;
2664
2665 statelock       : IFBOUND {
2666                         $$ = PFRULE_IFBOUND;
2667                 }
2668                 | GRBOUND {
2669                         $$ = PFRULE_GRBOUND;
2670                 }
2671                 | FLOATING {
2672                         $$ = 0;
2673                 }
2674                 ;
2675
2676 keep            : KEEP STATE state_opt_spec     {
2677                         $$.action = PF_STATE_NORMAL;
2678                         $$.options = $3;
2679                 }
2680                 | MODULATE STATE state_opt_spec {
2681                         $$.action = PF_STATE_MODULATE;
2682                         $$.options = $3;
2683                 }
2684                 | SYNPROXY STATE state_opt_spec {
2685                         $$.action = PF_STATE_SYNPROXY;
2686                         $$.options = $3;
2687                 }
2688                 ;
2689
2690 state_opt_spec  : '(' state_opt_list ')'        { $$ = $2; }
2691                 | /* empty */                   { $$ = NULL; }
2692                 ;
2693
2694 state_opt_list  : state_opt_item                { $$ = $1; }
2695                 | state_opt_list comma state_opt_item {
2696                         $1->tail->next = $3;
2697                         $1->tail = $3;
2698                         $$ = $1;
2699                 }
2700                 ;
2701
2702 state_opt_item  : MAXIMUM number                {
2703                         $$ = calloc(1, sizeof(struct node_state_opt));
2704                         if ($$ == NULL)
2705                                 err(1, "state_opt_item: calloc");
2706                         $$->type = PF_STATE_OPT_MAX;
2707                         $$->data.max_states = $2;
2708                         $$->next = NULL;
2709                         $$->tail = $$;
2710                 }
2711                 | NOSYNC                                {
2712                         $$ = calloc(1, sizeof(struct node_state_opt));
2713                         if ($$ == NULL)
2714                                 err(1, "state_opt_item: calloc");
2715                         $$->type = PF_STATE_OPT_NOSYNC;
2716                         $$->next = NULL;
2717                         $$->tail = $$;
2718                 }
2719                 | MAXSRCSTATES number                   {
2720                         $$ = calloc(1, sizeof(struct node_state_opt));
2721                         if ($$ == NULL)
2722                                 err(1, "state_opt_item: calloc");
2723                         $$->type = PF_STATE_OPT_MAX_SRC_STATES;
2724                         $$->data.max_src_states = $2;
2725                         $$->next = NULL;
2726                         $$->tail = $$;
2727                 }
2728                 | MAXSRCNODES number                    {
2729                         $$ = calloc(1, sizeof(struct node_state_opt));
2730                         if ($$ == NULL)
2731                                 err(1, "state_opt_item: calloc");
2732                         $$->type = PF_STATE_OPT_MAX_SRC_NODES;
2733                         $$->data.max_src_nodes = $2;
2734                         $$->next = NULL;
2735                         $$->tail = $$;
2736                 }
2737                 | sourcetrack {
2738                         $$ = calloc(1, sizeof(struct node_state_opt));
2739                         if ($$ == NULL)
2740                                 err(1, "state_opt_item: calloc");
2741                         $$->type = PF_STATE_OPT_SRCTRACK;
2742                         $$->data.src_track = $1;
2743                         $$->next = NULL;
2744                         $$->tail = $$;
2745                 }
2746                 | statelock {
2747                         $$ = calloc(1, sizeof(struct node_state_opt));
2748                         if ($$ == NULL)
2749                                 err(1, "state_opt_item: calloc");
2750                         $$->type = PF_STATE_OPT_STATELOCK;
2751                         $$->data.statelock = $1;
2752                         $$->next = NULL;
2753                         $$->tail = $$;
2754                 }
2755                 | STRING number                 {
2756                         int     i;
2757
2758                         for (i = 0; pf_timeouts[i].name &&
2759                             strcmp(pf_timeouts[i].name, $1); ++i)
2760                                 ;       /* nothing */
2761                         if (!pf_timeouts[i].name) {
2762                                 yyerror("illegal timeout name %s", $1);
2763                                 free($1);
2764                                 YYERROR;
2765                         }
2766                         if (strchr(pf_timeouts[i].name, '.') == NULL) {
2767                                 yyerror("illegal state timeout %s", $1);
2768                                 free($1);
2769                                 YYERROR;
2770                         }
2771                         free($1);
2772                         $$ = calloc(1, sizeof(struct node_state_opt));
2773                         if ($$ == NULL)
2774                                 err(1, "state_opt_item: calloc");
2775                         $$->type = PF_STATE_OPT_TIMEOUT;
2776                         $$->data.timeout.number = pf_timeouts[i].timeout;
2777                         $$->data.timeout.seconds = $2;
2778                         $$->next = NULL;
2779                         $$->tail = $$;
2780                 }
2781                 ;
2782
2783 label           : LABEL STRING                  {
2784                         $$ = $2;
2785                 }
2786                 ;
2787
2788 qname           : QUEUE STRING                          {
2789                         $$.qname = $2;
2790                 }
2791                 | QUEUE '(' STRING ')'                  {
2792                         $$.qname = $3;
2793                 }
2794                 | QUEUE '(' STRING comma STRING ')'     {
2795                         $$.qname = $3;
2796                         $$.pqname = $5;
2797                 }
2798                 ;
2799
2800 no              : /* empty */                   { $$ = 0; }
2801                 | NO                            { $$ = 1; }
2802                 ;
2803
2804 rport           : STRING                        {
2805                         char    *p = strchr($1, ':');
2806
2807                         if (p == NULL) {
2808                                 if (($$.a = getservice($1)) == -1) {
2809                                         free($1);
2810                                         YYERROR;
2811                                 }
2812                                 $$.b = $$.t = 0;
2813                         } else if (!strcmp(p+1, "*")) {
2814                                 *p = 0;
2815                                 if (($$.a = getservice($1)) == -1) {
2816                                         free($1);
2817                                         YYERROR;
2818                                 }
2819                                 $$.b = 0;
2820                                 $$.t = 1;
2821                         } else {
2822                                 *p++ = 0;
2823                                 if (($$.a = getservice($1)) == -1 ||
2824                                     ($$.b = getservice(p)) == -1) {
2825                                         free($1);
2826                                         YYERROR;
2827                                 }
2828                                 if ($$.a == $$.b)
2829                                         $$.b = 0;
2830                                 $$.t = 0;
2831                         }
2832                         free($1);
2833                 }
2834                 ;
2835
2836 redirspec       : host                          { $$ = $1; }
2837                 | '{' redir_host_list '}'       { $$ = $2; }
2838                 ;
2839
2840 redir_host_list : host                          { $$ = $1; }
2841                 | redir_host_list comma host    {
2842                         $1->tail->next = $3;
2843                         $1->tail = $3->tail;
2844                         $$ = $1;
2845                 }
2846                 ;
2847
2848 redirpool       : /* empty */                   { $$ = NULL; }
2849                 | ARROW redirspec               {
2850                         $$ = calloc(1, sizeof(struct redirection));
2851                         if ($$ == NULL)
2852                                 err(1, "redirection: calloc");
2853                         $$->host = $2;
2854                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
2855                 }
2856                 | ARROW redirspec PORT rport    {
2857                         $$ = calloc(1, sizeof(struct redirection));
2858                         if ($$ == NULL)
2859                                 err(1, "redirection: calloc");
2860                         $$->host = $2;
2861                         $$->rport = $4;
2862                 }
2863                 ;
2864
2865 hashkey         : /* empty */
2866                 {
2867                         $$ = calloc(1, sizeof(struct pf_poolhashkey));
2868                         if ($$ == NULL)
2869                                 err(1, "hashkey: calloc");
2870                         $$->key32[0] = arc4random();
2871                         $$->key32[1] = arc4random();
2872                         $$->key32[2] = arc4random();
2873                         $$->key32[3] = arc4random();
2874                 }
2875                 | string
2876                 {
2877                         if (!strncmp($1, "0x", 2)) {
2878                                 if (strlen($1) != 34) {
2879                                         free($1);
2880                                         yyerror("hex key must be 128 bits "
2881                                                 "(32 hex digits) long");
2882                                         YYERROR;
2883                                 }
2884                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
2885                                 if ($$ == NULL)
2886                                         err(1, "hashkey: calloc");
2887
2888                                 if (sscanf($1, "0x%8x%8x%8x%8x",
2889                                     &$$->key32[0], &$$->key32[1],
2890                                     &$$->key32[2], &$$->key32[3]) != 4) {
2891                                         free($$);
2892                                         free($1);
2893                                         yyerror("invalid hex key");
2894                                         YYERROR;
2895                                 }
2896                         } else {
2897                                 MD5_CTX context;
2898
2899                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
2900                                 if ($$ == NULL)
2901                                         err(1, "hashkey: calloc");
2902                                 MD5Init(&context);
2903                                 MD5Update(&context, (unsigned char *)$1,
2904                                     strlen($1));
2905                                 MD5Final((unsigned char *)$$, &context);
2906                                 $$->key32[0] = htonl($$->key32[0]);
2907                                 $$->key32[1] = htonl($$->key32[1]);
2908                                 $$->key32[2] = htonl($$->key32[2]);
2909                                 $$->key32[3] = htonl($$->key32[3]);
2910                         }
2911                         free($1);
2912                 }
2913                 ;
2914
2915 pool_opts       :       { bzero(&pool_opts, sizeof pool_opts); }
2916                     pool_opts_l
2917                         { $$ = pool_opts; }
2918                 | /* empty */   {
2919                         bzero(&pool_opts, sizeof pool_opts);
2920                         $$ = pool_opts;
2921                 }
2922                 ;
2923
2924 pool_opts_l     : pool_opts_l pool_opt
2925                 | pool_opt
2926                 ;
2927
2928 pool_opt        : BITMASK       {
2929                         if (pool_opts.type) {
2930                                 yyerror("pool type cannot be redefined");
2931                                 YYERROR;
2932                         }
2933                         pool_opts.type =  PF_POOL_BITMASK;
2934                 }
2935                 | RANDOM        {
2936                         if (pool_opts.type) {
2937                                 yyerror("pool type cannot be redefined");
2938                                 YYERROR;
2939                         }
2940                         pool_opts.type = PF_POOL_RANDOM;
2941                 }
2942                 | SOURCEHASH hashkey {
2943                         if (pool_opts.type) {
2944                                 yyerror("pool type cannot be redefined");
2945                                 YYERROR;
2946                         }
2947                         pool_opts.type = PF_POOL_SRCHASH;
2948                         pool_opts.key = $2;
2949                 }
2950                 | ROUNDROBIN    {
2951                         if (pool_opts.type) {
2952                                 yyerror("pool type cannot be redefined");
2953                                 YYERROR;
2954                         }
2955                         pool_opts.type = PF_POOL_ROUNDROBIN;
2956                 }
2957                 | STATICPORT    {
2958                         if (pool_opts.staticport) {
2959                                 yyerror("static-port cannot be redefined");
2960                                 YYERROR;
2961                         }
2962                         pool_opts.staticport = 1;
2963                 }
2964                 | STICKYADDRESS {
2965                         if (filter_opts.marker & POM_STICKYADDRESS) {
2966                                 yyerror("sticky-address cannot be redefined");
2967                                 YYERROR;
2968                         }
2969                         pool_opts.marker |= POM_STICKYADDRESS;
2970                         pool_opts.opts |= PF_POOL_STICKYADDR;
2971                 }
2972                 ;
2973
2974 redirection     : /* empty */                   { $$ = NULL; }
2975                 | ARROW host                    {
2976                         $$ = calloc(1, sizeof(struct redirection));
2977                         if ($$ == NULL)
2978                                 err(1, "redirection: calloc");
2979                         $$->host = $2;
2980                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
2981                 }
2982                 | ARROW host PORT rport {
2983                         $$ = calloc(1, sizeof(struct redirection));
2984                         if ($$ == NULL)
2985                                 err(1, "redirection: calloc");
2986                         $$->host = $2;
2987                         $$->rport = $4;
2988                 }
2989                 ;
2990
2991 natpass         : /* empty */   { $$ = 0; }
2992                 | PASS          { $$ = 1; }
2993                 ;
2994
2995 nataction       : no NAT natpass {
2996                         $$.b2 = $$.w = 0;
2997                         if ($1)
2998                                 $$.b1 = PF_NONAT;
2999                         else
3000                                 $$.b1 = PF_NAT;
3001                         $$.b2 = $3;
3002                 }
3003                 | no RDR natpass {
3004                         $$.b2 = $$.w = 0;
3005                         if ($1)
3006                                 $$.b1 = PF_NORDR;
3007                         else
3008                                 $$.b1 = PF_RDR;
3009                         $$.b2 = $3;
3010                 }
3011                 ;
3012
3013 natrule         : nataction interface af proto fromto tag redirpool pool_opts
3014                 {
3015                         struct pf_rule  r;
3016
3017                         if (check_rulestate(PFCTL_STATE_NAT))
3018                                 YYERROR;
3019
3020                         memset(&r, 0, sizeof(r));
3021
3022                         r.action = $1.b1;
3023                         r.natpass = $1.b2;
3024                         r.af = $3;
3025
3026                         if (!r.af) {
3027                                 if ($5.src.host && $5.src.host->af &&
3028                                     !$5.src.host->ifindex)
3029                                         r.af = $5.src.host->af;
3030                                 else if ($5.dst.host && $5.dst.host->af &&
3031                                     !$5.dst.host->ifindex)
3032                                         r.af = $5.dst.host->af;
3033                         }
3034
3035                         if ($6 != NULL)
3036                                 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
3037                                     PF_TAG_NAME_SIZE) {
3038                                         yyerror("tag too long, max %u chars",
3039                                             PF_TAG_NAME_SIZE - 1);
3040                                         YYERROR;
3041                                 }
3042
3043                         if (r.action == PF_NONAT || r.action == PF_NORDR) {
3044                                 if ($7 != NULL) {
3045                                         yyerror("translation rule with 'no' "
3046                                             "does not need '->'");
3047                                         YYERROR;
3048                                 }
3049                         } else {
3050                                 if ($7 == NULL || $7->host == NULL) {
3051                                         yyerror("translation rule requires '-> "
3052                                             "address'");
3053                                         YYERROR;
3054                                 }
3055                                 if (!r.af && ! $7->host->ifindex)
3056                                         r.af = $7->host->af;
3057
3058                                 remove_invalid_hosts(&$7->host, &r.af);
3059                                 if (invalid_redirect($7->host, r.af))
3060                                         YYERROR;
3061                                 if (check_netmask($7->host, r.af))
3062                                         YYERROR;
3063
3064                                 r.rpool.proxy_port[0] = ntohs($7->rport.a);
3065
3066                                 switch (r.action) {
3067                                 case PF_RDR:
3068                                         if (!$7->rport.b && $7->rport.t &&
3069                                             $5.dst.port != NULL) {
3070                                                 r.rpool.proxy_port[1] =
3071                                                     ntohs($7->rport.a) +
3072                                                     (ntohs(
3073                                                     $5.dst.port->port[1]) -
3074                                                     ntohs(
3075                                                     $5.dst.port->port[0]));
3076                                         } else
3077                                                 r.rpool.proxy_port[1] =
3078                                                     ntohs($7->rport.b);
3079                                         break;
3080                                 case PF_NAT:
3081                                         r.rpool.proxy_port[1] =
3082                                             ntohs($7->rport.b);
3083                                         if (!r.rpool.proxy_port[0] &&
3084                                             !r.rpool.proxy_port[1]) {
3085                                                 r.rpool.proxy_port[0] =
3086                                                     PF_NAT_PROXY_PORT_LOW;
3087                                                 r.rpool.proxy_port[1] =
3088                                                     PF_NAT_PROXY_PORT_HIGH;
3089                                         } else if (!r.rpool.proxy_port[1])
3090                                                 r.rpool.proxy_port[1] =
3091                                                     r.rpool.proxy_port[0];
3092                                         break;
3093                                 default:
3094                                         break;
3095                                 }
3096
3097                                 r.rpool.opts = $8.type;
3098                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
3099                                     PF_POOL_NONE && ($7->host->next != NULL ||
3100                                     $7->host->addr.type == PF_ADDR_TABLE ||
3101                                     DYNIF_MULTIADDR($7->host->addr)))
3102                                         r.rpool.opts = PF_POOL_ROUNDROBIN;
3103                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3104                                     PF_POOL_ROUNDROBIN &&
3105                                     disallow_table($7->host, "tables are only "
3106                                     "supported in round-robin redirection "
3107                                     "pools"))
3108                                         YYERROR;
3109                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3110                                     PF_POOL_ROUNDROBIN &&
3111                                     disallow_alias($7->host, "interface (%s) "
3112                                     "is only supported in round-robin "
3113                                     "redirection pools"))
3114                                         YYERROR;
3115                                 if ($7->host->next != NULL) {
3116                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3117                                             PF_POOL_ROUNDROBIN) {
3118                                                 yyerror("only round-robin "
3119                                                     "valid for multiple "
3120                                                     "redirection addresses");
3121                                                 YYERROR;
3122                                         }
3123                                 }
3124                         }
3125
3126                         if ($8.key != NULL)
3127                                 memcpy(&r.rpool.key, $8.key,
3128                                     sizeof(struct pf_poolhashkey));
3129
3130                          if ($8.opts)
3131                                 r.rpool.opts |= $8.opts;
3132
3133                         if ($8.staticport) {
3134                                 if (r.action != PF_NAT) {
3135                                         yyerror("the 'static-port' option is "
3136                                             "only valid with nat rules");
3137                                         YYERROR;
3138                                 }
3139                                 if (r.rpool.proxy_port[0] !=
3140                                     PF_NAT_PROXY_PORT_LOW &&
3141                                     r.rpool.proxy_port[1] !=
3142                                     PF_NAT_PROXY_PORT_HIGH) {
3143                                         yyerror("the 'static-port' option can't"
3144                                             " be used when specifying a port"
3145                                             " range");
3146                                         YYERROR;
3147                                 }
3148                                 r.rpool.proxy_port[0] = 0;
3149                                 r.rpool.proxy_port[1] = 0;
3150                         }
3151
3152                         expand_rule(&r, $2, $7 == NULL ? NULL : $7->host, $4,
3153                             $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
3154                             $5.dst.port, 0, 0, 0);
3155                         free($7);
3156                 }
3157                 ;
3158
3159 binatrule       : no BINAT natpass interface af proto FROM host TO ipspec tag
3160                     redirection
3161                 {
3162                         struct pf_rule          binat;
3163                         struct pf_pooladdr      *pa;
3164
3165                         if (check_rulestate(PFCTL_STATE_NAT))
3166                                 YYERROR;
3167
3168                         memset(&binat, 0, sizeof(binat));
3169
3170                         if ($1)
3171                                 binat.action = PF_NOBINAT;
3172                         else
3173                                 binat.action = PF_BINAT;
3174                         binat.natpass = $3;
3175                         binat.af = $5;
3176                         if (!binat.af && $8 != NULL && $8->af)
3177                                 binat.af = $8->af;
3178                         if (!binat.af && $10 != NULL && $10->af)
3179                                 binat.af = $10->af;
3180                         if (!binat.af && $12 != NULL && $12->host)
3181                                 binat.af = $12->host->af;
3182                         if (!binat.af) {
3183                                 yyerror("address family (inet/inet6) "
3184                                     "undefined");
3185                                 YYERROR;
3186                         }
3187
3188                         if ($4 != NULL) {
3189                                 memcpy(binat.ifname, $4->ifname,
3190                                     sizeof(binat.ifname));
3191                                 binat.ifnot = $4->not;
3192                                 free($4);
3193                         }
3194                         if ($11 != NULL)
3195                                 if (strlcpy(binat.tagname, $11,
3196                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
3197                                         yyerror("tag too long, max %u chars",
3198                                             PF_TAG_NAME_SIZE - 1);
3199                                         YYERROR;
3200                                 }
3201
3202                         if ($6 != NULL) {
3203                                 binat.proto = $6->proto;
3204                                 free($6);
3205                         }
3206
3207                         if ($8 != NULL && disallow_table($8, "invalid use of "
3208                             "table <%s> as the source address of a binat rule"))
3209                                 YYERROR;
3210                         if ($8 != NULL && disallow_alias($8, "invalid use of "
3211                             "interface (%s) as the source address of a binat "
3212                             "rule"))
3213                                 YYERROR;
3214                         if ($12 != NULL && $12->host != NULL && disallow_table(
3215                             $12->host, "invalid use of table <%s> as the "
3216                             "redirect address of a binat rule"))
3217                                 YYERROR;
3218                         if ($12 != NULL && $12->host != NULL && disallow_alias(
3219                             $12->host, "invalid use of interface (%s) as the "
3220                             "redirect address of a binat rule"))
3221                                 YYERROR;
3222
3223                         if ($8 != NULL) {
3224                                 if ($8->next) {
3225                                         yyerror("multiple binat ip addresses");
3226                                         YYERROR;
3227                                 }
3228                                 if ($8->addr.type == PF_ADDR_DYNIFTL)
3229                                         $8->af = binat.af;
3230                                 if ($8->af != binat.af) {
3231                                         yyerror("binat ip versions must match");
3232                                         YYERROR;
3233                                 }
3234                                 if (check_netmask($8, binat.af))
3235                                         YYERROR;
3236                                 memcpy(&binat.src.addr, &$8->addr,
3237                                     sizeof(binat.src.addr));
3238                                 free($8);
3239                         }
3240                         if ($10 != NULL) {
3241                                 if ($10->next) {
3242                                         yyerror("multiple binat ip addresses");
3243                                         YYERROR;
3244                                 }
3245                                 if ($10->af != binat.af && $10->af) {
3246                                         yyerror("binat ip versions must match");
3247                                         YYERROR;
3248                                 }
3249                                 if (check_netmask($10, binat.af))
3250                                         YYERROR;
3251                                 memcpy(&binat.dst.addr, &$10->addr,
3252                                     sizeof(binat.dst.addr));
3253                                 binat.dst.not = $10->not;
3254                                 free($10);
3255                         }
3256
3257                         if (binat.action == PF_NOBINAT) {
3258                                 if ($12 != NULL) {
3259                                         yyerror("'no binat' rule does not need"
3260                                             " '->'");
3261                                         YYERROR;
3262                                 }
3263                         } else {
3264                                 if ($12 == NULL || $12->host == NULL) {
3265                                         yyerror("'binat' rule requires"
3266                                             " '-> address'");
3267                                         YYERROR;
3268                                 }
3269
3270                                 remove_invalid_hosts(&$12->host, &binat.af);
3271                                 if (invalid_redirect($12->host, binat.af))
3272                                         YYERROR;
3273                                 if ($12->host->next != NULL) {
3274                                         yyerror("binat rule must redirect to "
3275                                             "a single address");
3276                                         YYERROR;
3277                                 }
3278                                 if (check_netmask($12->host, binat.af))
3279                                         YYERROR;
3280
3281                                 if (!PF_AZERO(&binat.src.addr.v.a.mask,
3282                                     binat.af) &&
3283                                     !PF_AEQ(&binat.src.addr.v.a.mask,
3284                                     &$12->host->addr.v.a.mask, binat.af)) {
3285                                         yyerror("'binat' source mask and "
3286                                             "redirect mask must be the same");
3287                                         YYERROR;
3288                                 }
3289
3290                                 TAILQ_INIT(&binat.rpool.list);
3291                                 pa = calloc(1, sizeof(struct pf_pooladdr));
3292                                 if (pa == NULL)
3293                                         err(1, "binat: calloc");
3294                                 pa->addr = $12->host->addr;
3295                                 pa->ifname[0] = 0;
3296                                 TAILQ_INSERT_TAIL(&binat.rpool.list,
3297                                     pa, entries);
3298
3299                                 free($12);
3300                         }
3301
3302                         pfctl_add_rule(pf, &binat);
3303                 }
3304                 ;
3305
3306 tag             : /* empty */           { $$ = NULL; }
3307                 | TAG STRING            { $$ = $2; }
3308                 ;
3309
3310 route_host      : STRING                        {
3311                         $$ = calloc(1, sizeof(struct node_host));
3312                         if ($$ == NULL)
3313                                 err(1, "route_host: calloc");
3314                         $$->ifname = $1;
3315                         if (ifa_exists($$->ifname, 0) == NULL) {
3316                                 yyerror("routeto: unknown interface %s",
3317                                     $$->ifname);
3318                                 free($1);
3319                                 free($$);
3320                                 YYERROR;
3321                         }
3322                         set_ipmask($$, 128);
3323                         $$->next = NULL;
3324                         $$->tail = $$;
3325                 }
3326                 | '(' STRING host ')'           {
3327                         $$ = $3;
3328                         $$->ifname = $2;
3329                         if (ifa_exists($$->ifname, 0) == NULL) {
3330                                 yyerror("routeto: unknown interface %s",
3331                                     $$->ifname);
3332                                 YYERROR;
3333                         }
3334                 }
3335                 ;
3336
3337 route_host_list : route_host                            { $$ = $1; }
3338                 | route_host_list comma route_host      {
3339                         if ($1->af == 0)
3340                                 $1->af = $3->af;
3341                         if ($1->af != $3->af) {
3342                                 yyerror("all pool addresses must be in the "
3343                                     "same address family");
3344                                 YYERROR;
3345                         }
3346                         $1->tail->next = $3;
3347                         $1->tail = $3->tail;
3348                         $$ = $1;
3349                 }
3350                 ;
3351
3352 routespec       : route_host                    { $$ = $1; }
3353                 | '{' route_host_list '}'       { $$ = $2; }
3354                 ;
3355
3356 route           : /* empty */                   {
3357                         $$.host = NULL;
3358                         $$.rt = 0;
3359                         $$.pool_opts = 0;
3360                 }
3361                 | FASTROUTE {
3362                         $$.host = NULL;
3363                         $$.rt = PF_FASTROUTE;
3364                         $$.pool_opts = 0;
3365                 }
3366                 | ROUTETO routespec pool_opts {
3367                         $$.host = $2;
3368                         $$.rt = PF_ROUTETO;
3369                         $$.pool_opts = $3.type | $3.opts;
3370                         if ($3.key != NULL)
3371                                 $$.key = $3.key;
3372                 }
3373                 | REPLYTO routespec pool_opts {
3374                         $$.host = $2;
3375                         $$.rt = PF_REPLYTO;
3376                         $$.pool_opts = $3.type | $3.opts;
3377                         if ($3.key != NULL)
3378                                 $$.key = $3.key;
3379                 }
3380                 | DUPTO routespec pool_opts {
3381                         $$.host = $2;
3382                         $$.rt = PF_DUPTO;
3383                         $$.pool_opts = $3.type | $3.opts;
3384                         if ($3.key != NULL)
3385                                 $$.key = $3.key;
3386                 }
3387                 ;
3388
3389 timeout_spec    : STRING number
3390                 {
3391                         if (check_rulestate(PFCTL_STATE_OPTION)) {
3392                                 free($1);
3393                                 YYERROR;
3394                         }
3395                         if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
3396                                 yyerror("unknown timeout %s", $1);
3397                                 free($1);
3398                                 YYERROR;
3399                         }
3400                         free($1);
3401                 }
3402                 ;
3403
3404 timeout_list    : timeout_list comma timeout_spec
3405                 | timeout_spec
3406                 ;
3407
3408 limit_spec      : STRING number
3409                 {
3410                         if (check_rulestate(PFCTL_STATE_OPTION)) {
3411                                 free($1);
3412                                 YYERROR;
3413                         }
3414                         if (pfctl_set_limit(pf, $1, $2) != 0) {
3415                                 yyerror("unable to set limit %s %u", $1, $2);
3416                                 free($1);
3417                                 YYERROR;
3418                         }
3419                         free($1);
3420                 }
3421                 ;
3422
3423 limit_list      : limit_list comma limit_spec
3424                 | limit_spec
3425                 ;
3426
3427 comma           : ','
3428                 | /* empty */
3429                 ;
3430
3431 yesno           : NO                    { $$ = 0; }
3432                 | STRING                {
3433                         if (!strcmp($1, "yes"))
3434                                 $$ = 1;
3435                         else {
3436                                 free($1);
3437                                 YYERROR;
3438                         }
3439                         free($1);
3440                 }
3441                 ;
3442
3443 unaryop         : '='           { $$ = PF_OP_EQ; }
3444                 | '!' '='       { $$ = PF_OP_NE; }
3445                 | '<' '='       { $$ = PF_OP_LE; }
3446                 | '<'           { $$ = PF_OP_LT; }
3447                 | '>' '='       { $$ = PF_OP_GE; }
3448                 | '>'           { $$ = PF_OP_GT; }
3449                 ;
3450
3451 %%
3452
3453 int
3454 yyerror(const char *fmt, ...)
3455 {
3456         va_list          ap;
3457
3458         errors = 1;
3459         va_start(ap, fmt);
3460         fprintf(stderr, "%s:%d: ", infile, yylval.lineno);
3461         vfprintf(stderr, fmt, ap);
3462         fprintf(stderr, "\n");
3463         va_end(ap);
3464         return (0);
3465 }
3466
3467 int
3468 disallow_table(struct node_host *h, const char *fmt)
3469 {
3470         for (; h != NULL; h = h->next)
3471                 if (h->addr.type == PF_ADDR_TABLE) {
3472                         yyerror(fmt, h->addr.v.tblname);
3473                         return (1);
3474                 }
3475         return (0);
3476 }
3477
3478 int
3479 disallow_alias(struct node_host *h, const char *fmt)
3480 {
3481         for (; h != NULL; h = h->next)
3482                 if (DYNIF_MULTIADDR(h->addr)) {
3483                         yyerror(fmt, h->addr.v.tblname);
3484                         return (1);
3485                 }
3486         return (0);
3487 }
3488
3489 int
3490 rule_consistent(struct pf_rule *r)
3491 {
3492         int     problems = 0;
3493
3494         switch (r->action) {
3495         case PF_PASS:
3496         case PF_DROP:
3497         case PF_SCRUB:
3498                 problems = filter_consistent(r);
3499                 break;
3500         case PF_NAT:
3501         case PF_NONAT:
3502                 problems = nat_consistent(r);
3503                 break;
3504         case PF_RDR:
3505         case PF_NORDR:
3506                 problems = rdr_consistent(r);
3507                 break;
3508         case PF_BINAT:
3509         case PF_NOBINAT:
3510         default:
3511                 break;
3512         }
3513         return (problems);
3514 }
3515
3516 int
3517 filter_consistent(struct pf_rule *r)
3518 {
3519         int     problems = 0;
3520
3521         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
3522             (r->src.port_op || r->dst.port_op)) {
3523                 yyerror("port only applies to tcp/udp");
3524                 problems++;
3525         }
3526         if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
3527             (r->type || r->code)) {
3528                 yyerror("icmp-type/code only applies to icmp");
3529                 problems++;
3530         }
3531         if (!r->af && (r->type || r->code)) {
3532                 yyerror("must indicate address family with icmp-type/code");
3533                 problems++;
3534         }
3535         if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
3536             (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
3537                 yyerror("proto %s doesn't match address family %s",
3538                     r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
3539                     r->af == AF_INET ? "inet" : "inet6");
3540                 problems++;
3541         }
3542         if (r->allow_opts && r->action != PF_PASS) {
3543                 yyerror("allow-opts can only be specified for pass rules");
3544                 problems++;
3545         }
3546         if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
3547             r->dst.port_op || r->flagset || r->type || r->code)) {
3548                 yyerror("fragments can be filtered only on IP header fields");
3549                 problems++;
3550         }
3551         if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
3552                 yyerror("return-rst can only be applied to TCP rules");
3553                 problems++;
3554         }
3555         if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
3556                 yyerror("max-src-nodes requires 'source-track rule'");
3557                 problems++;
3558         }
3559         if (r->action == PF_DROP && r->keep_state) {
3560                 yyerror("keep state on block rules doesn't make sense");
3561                 problems++;
3562         }
3563         if ((r->tagname[0] || r->match_tagname[0]) && !r->keep_state &&
3564             r->action == PF_PASS && !r->anchorname[0]) {
3565                 yyerror("tags cannot be used without keep state");
3566                 problems++;
3567         }
3568         return (-problems);
3569 }
3570
3571 int
3572 nat_consistent(struct pf_rule *r __unused)
3573 {
3574         return (0);     /* yeah! */
3575 }
3576
3577 int
3578 rdr_consistent(struct pf_rule *r)
3579 {
3580         int                      problems = 0;
3581
3582         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
3583                 if (r->src.port_op) {
3584                         yyerror("src port only applies to tcp/udp");
3585                         problems++;
3586                 }
3587                 if (r->dst.port_op) {
3588                         yyerror("dst port only applies to tcp/udp");
3589                         problems++;
3590                 }
3591                 if (r->rpool.proxy_port[0]) {
3592                         yyerror("rpool port only applies to tcp/udp");
3593                         problems++;
3594                 }
3595         }
3596         if (r->dst.port_op &&
3597             r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
3598                 yyerror("invalid port operator for rdr destination port");
3599                 problems++;
3600         }
3601         return (-problems);
3602 }
3603
3604 int
3605 process_tabledef(char *name, struct table_opts *opts)
3606 {
3607         struct pfr_buffer        ab;
3608         struct node_tinit       *ti;
3609
3610         bzero(&ab, sizeof(ab));
3611         ab.pfrb_type = PFRB_ADDRS;
3612         SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
3613                 if (ti->file)
3614                         if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
3615                                 if (errno)
3616                                         yyerror("cannot load \"%s\": %s",
3617                                             ti->file, strerror(errno));
3618                                 else
3619                                         yyerror("file \"%s\" contains bad data",
3620                                             ti->file);
3621                                 goto _error;
3622                         }
3623                 if (ti->host)
3624                         if (append_addr_host(&ab, ti->host, 0, 0)) {
3625                                 yyerror("cannot create address buffer: %s",
3626                                     strerror(errno));
3627                                 goto _error;
3628                         }
3629         }
3630         if (pf->opts & PF_OPT_VERBOSE)
3631                 print_tabledef(name, opts->flags, opts->init_addr,
3632                     &opts->init_nodes);
3633         if (!(pf->opts & PF_OPT_NOACTION) &&
3634             pfctl_define_table(name, opts->flags, opts->init_addr,
3635             pf->anchor, pf->ruleset, &ab, pf->tticket)) {
3636                 yyerror("cannot define table %s: %s", name,
3637                     pfr_strerror(errno));
3638                 goto _error;
3639         }
3640         pf->tdirty = 1;
3641         pfr_buf_clear(&ab);
3642         return (0);
3643 _error:
3644         pfr_buf_clear(&ab);
3645         return (-1);
3646 }
3647
3648 struct keywords {
3649         const char      *k_name;
3650         int              k_val;
3651 };
3652
3653 /* macro gore, but you should've seen the prior indentation nightmare... */
3654
3655 #define FREE_LIST(T,r) \
3656         do { \
3657                 T *p, *node = r; \
3658                 while (node != NULL) { \
3659                         p = node; \
3660                         node = node->next; \
3661                         free(p); \
3662                 } \
3663         } while (0)
3664
3665 #define LOOP_THROUGH(T,n,r,C) \
3666         do { \
3667                 T *n; \
3668                 if (r == NULL) { \
3669                         r = calloc(1, sizeof(T)); \
3670                         if (r == NULL) \
3671                                 err(1, "LOOP: calloc"); \
3672                         r->next = NULL; \
3673                 } \
3674                 n = r; \
3675                 while (n != NULL) { \
3676                         do { \
3677                                 C; \
3678                         } while (0); \
3679                         n = n->next; \
3680                 } \
3681         } while (0)
3682
3683 void
3684 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
3685 {
3686         char *tmp;
3687         char *p, *q;
3688
3689         if ((tmp = calloc(1, len)) == NULL)
3690                 err(1, "expand_label_str: calloc");
3691         p = q = label;
3692         while ((q = strstr(p, srch)) != NULL) {
3693                 *q = '\0';
3694                 if ((strlcat(tmp, p, len) >= len) ||
3695                     (strlcat(tmp, repl, len) >= len))
3696                         errx(1, "expand_label: label too long");
3697                 q += strlen(srch);
3698                 p = q;
3699         }
3700         if (strlcat(tmp, p, len) >= len)
3701                 errx(1, "expand_label: label too long");
3702         strlcpy(label, tmp, len);       /* always fits */
3703         free(tmp);
3704 }
3705
3706 void
3707 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
3708 {
3709         if (strstr(label, name) != NULL) {
3710                 if (!*ifname)
3711                         expand_label_str(label, len, name, "any");
3712                 else
3713                         expand_label_str(label, len, name, ifname);
3714         }
3715 }
3716
3717 void
3718 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
3719     struct node_host *h)
3720 {
3721         char tmp[64], tmp_not[66];
3722
3723         if (strstr(label, name) != NULL) {
3724                 switch (h->addr.type) {
3725                 case PF_ADDR_DYNIFTL:
3726                         snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
3727                         break;
3728                 case PF_ADDR_TABLE:
3729                         snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
3730                         break;
3731                 case PF_ADDR_NOROUTE:
3732                         snprintf(tmp, sizeof(tmp), "no-route");
3733                         break;
3734                 case PF_ADDR_ADDRMASK:
3735                         if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
3736                             PF_AZERO(&h->addr.v.a.mask, af)))
3737                                 snprintf(tmp, sizeof(tmp), "any");
3738                         else {
3739                                 char    a[48];
3740                                 int     bits;
3741
3742                                 if (inet_ntop(af, &h->addr.v.a.addr, a,
3743                                     sizeof(a)) == NULL)
3744                                         snprintf(tmp, sizeof(tmp), "?");
3745                                 else {
3746                                         bits = unmask(&h->addr.v.a.mask, af);
3747                                         if ((af == AF_INET && bits < 32) ||
3748                                             (af == AF_INET6 && bits < 128))
3749                                                 snprintf(tmp, sizeof(tmp),
3750                                                     "%s/%d", a, bits);
3751                                         else
3752                                                 snprintf(tmp, sizeof(tmp),
3753                                                     "%s", a);
3754                                 }
3755                         }
3756                         break;
3757                 default:
3758                         snprintf(tmp, sizeof(tmp), "?");
3759                         break;
3760                 }
3761
3762                 if (h->not) {
3763                         snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
3764                         expand_label_str(label, len, name, tmp_not);
3765                 } else
3766                         expand_label_str(label, len, name, tmp);
3767         }
3768 }
3769
3770 void
3771 expand_label_port(const char *name, char *label, size_t len,
3772     struct node_port *port)
3773 {
3774         char     a1[6], a2[6], op[13] = "";
3775
3776         if (strstr(label, name) != NULL) {
3777                 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
3778                 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
3779                 if (!port->op)
3780                         ;
3781                 else if (port->op == PF_OP_IRG)
3782                         snprintf(op, sizeof(op), "%s><%s", a1, a2);
3783                 else if (port->op == PF_OP_XRG)
3784                         snprintf(op, sizeof(op), "%s<>%s", a1, a2);
3785                 else if (port->op == PF_OP_EQ)
3786                         snprintf(op, sizeof(op), "%s", a1);
3787                 else if (port->op == PF_OP_NE)
3788                         snprintf(op, sizeof(op), "!=%s", a1);
3789                 else if (port->op == PF_OP_LT)
3790                         snprintf(op, sizeof(op), "<%s", a1);
3791                 else if (port->op == PF_OP_LE)
3792                         snprintf(op, sizeof(op), "<=%s", a1);
3793                 else if (port->op == PF_OP_GT)
3794                         snprintf(op, sizeof(op), ">%s", a1);
3795                 else if (port->op == PF_OP_GE)
3796                         snprintf(op, sizeof(op), ">=%s", a1);
3797                 expand_label_str(label, len, name, op);
3798         }
3799 }
3800
3801 void
3802 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
3803 {
3804         struct protoent *pe;
3805         char n[4];
3806
3807         if (strstr(label, name) != NULL) {
3808                 pe = getprotobynumber(proto);
3809                 if (pe != NULL)
3810                         expand_label_str(label, len, name, pe->p_name);
3811                 else {
3812                         snprintf(n, sizeof(n), "%u", proto);
3813                         expand_label_str(label, len, name, n);
3814                 }
3815         }
3816 }
3817
3818 void
3819 expand_label_nr(const char *name, char *label, size_t len)
3820 {
3821         char n[11];
3822
3823         if (strstr(label, name) != NULL) {
3824                 snprintf(n, sizeof(n), "%u", pf->rule_nr);
3825                 expand_label_str(label, len, name, n);
3826         }
3827 }
3828
3829 void
3830 expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
3831     struct node_host *src_host, struct node_port *src_port,
3832     struct node_host *dst_host, struct node_port *dst_port,
3833     u_int8_t proto)
3834 {
3835         expand_label_if("$if", label, len, ifname);
3836         expand_label_addr("$srcaddr", label, len, af, src_host);
3837         expand_label_addr("$dstaddr", label, len, af, dst_host);
3838         expand_label_port("$srcport", label, len, src_port);
3839         expand_label_port("$dstport", label, len, dst_port);
3840         expand_label_proto("$proto", label, len, proto);
3841         expand_label_nr("$nr", label, len);
3842 }
3843
3844 int
3845 expand_altq(struct pf_altq *a, struct node_if *interfaces,
3846     struct node_queue *nqueues, struct node_queue_bw bwspec,
3847     struct node_queue_opt *opts)
3848 {
3849         struct pf_altq           pa, pb;
3850         char                     qname[PF_QNAME_SIZE];
3851         struct node_queue       *n;
3852         struct node_queue_bw     bw;
3853         int                      errs = 0;
3854
3855         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
3856                 FREE_LIST(struct node_if, interfaces);
3857                 FREE_LIST(struct node_queue, nqueues);
3858                 return (0);
3859         }
3860
3861         LOOP_THROUGH(struct node_if, interface, interfaces,
3862                 memcpy(&pa, a, sizeof(struct pf_altq));
3863                 if (strlcpy(pa.ifname, interface->ifname,
3864                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
3865                         errx(1, "expand_altq: strlcpy");
3866
3867                 if (interface->not) {
3868                         yyerror("altq on ! <interface> is not supported");
3869                         errs++;
3870                 } else {
3871                         if (eval_pfaltq(pf, &pa, &bwspec, opts))
3872                                 errs++;
3873                         else
3874                                 if (pfctl_add_altq(pf, &pa))
3875                                         errs++;
3876
3877                         if (pf->opts & PF_OPT_VERBOSE) {
3878                                 print_altq(&pf->paltq->altq, 0,
3879                                     &bwspec, opts);
3880                                 if (nqueues && nqueues->tail) {
3881                                         printf("queue { ");
3882                                         LOOP_THROUGH(struct node_queue, queue,
3883                                             nqueues,
3884                                                 printf("%s ",
3885                                                     queue->queue);
3886                                         );
3887                                         printf("}");
3888                                 }
3889                                 printf("\n");
3890                         }
3891
3892                         if (pa.scheduler == ALTQT_CBQ ||
3893                             pa.scheduler == ALTQT_HFSC) {
3894                                 /* now create a root queue */
3895                                 memset(&pb, 0, sizeof(struct pf_altq));
3896                                 if (strlcpy(qname, "root_", sizeof(qname)) >=
3897                                     sizeof(qname))
3898                                         errx(1, "expand_altq: strlcpy");
3899                                 if (strlcat(qname, interface->ifname,
3900                                     sizeof(qname)) >= sizeof(qname))
3901                                         errx(1, "expand_altq: strlcat");
3902                                 if (strlcpy(pb.qname, qname,
3903                                     sizeof(pb.qname)) >= sizeof(pb.qname))
3904                                         errx(1, "expand_altq: strlcpy");
3905                                 if (strlcpy(pb.ifname, interface->ifname,
3906                                     sizeof(pb.ifname)) >= sizeof(pb.ifname))
3907                                         errx(1, "expand_altq: strlcpy");
3908                                 pb.qlimit = pa.qlimit;
3909                                 pb.scheduler = pa.scheduler;
3910                                 bw.bw_absolute = pa.ifbandwidth;
3911                                 bw.bw_percent = 0;
3912                                 if (eval_pfqueue(pf, &pb, &bw, opts))
3913                                         errs++;
3914                                 else
3915                                         if (pfctl_add_altq(pf, &pb))
3916                                                 errs++;
3917                         }
3918
3919                         LOOP_THROUGH(struct node_queue, queue, nqueues,
3920                                 n = calloc(1, sizeof(struct node_queue));
3921                                 if (n == NULL)
3922                                         err(1, "expand_altq: calloc");
3923                                 if (pa.scheduler == ALTQT_CBQ ||
3924                                     pa.scheduler == ALTQT_HFSC)
3925                                         if (strlcpy(n->parent, qname,
3926                                             sizeof(n->parent)) >=
3927                                             sizeof(n->parent))
3928                                                 errx(1, "expand_altq: strlcpy");
3929                                 if (strlcpy(n->queue, queue->queue,
3930                                     sizeof(n->queue)) >= sizeof(n->queue))
3931                                         errx(1, "expand_altq: strlcpy");
3932                                 if (strlcpy(n->ifname, interface->ifname,
3933                                     sizeof(n->ifname)) >= sizeof(n->ifname))
3934                                         errx(1, "expand_altq: strlcpy");
3935                                 n->scheduler = pa.scheduler;
3936                                 n->next = NULL;
3937                                 n->tail = n;
3938                                 if (queues == NULL)
3939                                         queues = n;
3940                                 else {
3941                                         queues->tail->next = n;
3942                                         queues->tail = n;
3943                                 }
3944                         );
3945                 }
3946         );
3947         FREE_LIST(struct node_if, interfaces);
3948         FREE_LIST(struct node_queue, nqueues);
3949
3950         return (errs);
3951 }
3952
3953 int
3954 expand_queue(struct pf_altq *a, struct node_if *interfaces,
3955     struct node_queue *nqueues, struct node_queue_bw bwspec,
3956     struct node_queue_opt *opts)
3957 {
3958         struct node_queue       *n, *nq;
3959         struct pf_altq           pa;
3960         u_int8_t                 found = 0;
3961         u_int8_t                 errs = 0;
3962
3963         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
3964                 FREE_LIST(struct node_queue, nqueues);
3965                 return (0);
3966         }
3967
3968         if (queues == NULL) {
3969                 yyerror("queue %s has no parent", a->qname);
3970                 FREE_LIST(struct node_queue, nqueues);
3971                 return (1);
3972         }
3973
3974         LOOP_THROUGH(struct node_if, interface, interfaces,
3975                 LOOP_THROUGH(struct node_queue, tqueue, queues,
3976                         if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
3977                             (interface->ifname[0] == 0 ||
3978                             (!interface->not && !strncmp(interface->ifname,
3979                             tqueue->ifname, IFNAMSIZ)) ||
3980                             (interface->not && strncmp(interface->ifname,
3981                             tqueue->ifname, IFNAMSIZ)))) {
3982                                 /* found ourself in queues */
3983                                 found++;
3984
3985                                 memcpy(&pa, a, sizeof(struct pf_altq));
3986
3987                                 if (pa.scheduler != ALTQT_NONE &&
3988                                     pa.scheduler != tqueue->scheduler) {
3989                                         yyerror("exactly one scheduler type "
3990                                             "per interface allowed");
3991                                         return (1);
3992                                 }
3993                                 pa.scheduler = tqueue->scheduler;
3994
3995                                 /* scheduler dependent error checking */
3996                                 switch (pa.scheduler) {
3997                                 case ALTQT_PRIQ:
3998                                         if (nqueues != NULL) {
3999                                                 yyerror("priq queues cannot "
4000                                                     "have child queues");
4001                                                 return (1);
4002                                         }
4003                                         if (bwspec.bw_absolute > 0 ||
4004                                             bwspec.bw_percent < 100) {
4005                                                 yyerror("priq doesn't take "
4006                                                     "bandwidth");
4007                                                 return (1);
4008                                         }
4009                                         break;
4010                                 default:
4011                                         break;
4012                                 }
4013
4014                                 if (strlcpy(pa.ifname, tqueue->ifname,
4015                                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4016                                         errx(1, "expand_queue: strlcpy");
4017                                 if (strlcpy(pa.parent, tqueue->parent,
4018                                     sizeof(pa.parent)) >= sizeof(pa.parent))
4019                                         errx(1, "expand_queue: strlcpy");
4020
4021                                 if (eval_pfqueue(pf, &pa, &bwspec, opts))
4022                                         errs++;
4023                                 else
4024                                         if (pfctl_add_altq(pf, &pa))
4025                                                 errs++;
4026
4027                                 for (nq = nqueues; nq != NULL; nq = nq->next) {
4028                                         if (!strcmp(a->qname, nq->queue)) {
4029                                                 yyerror("queue cannot have "
4030                                                     "itself as child");
4031                                                 errs++;
4032                                                 continue;
4033                                         }
4034                                         n = calloc(1,
4035                                             sizeof(struct node_queue));
4036                                         if (n == NULL)
4037                                                 err(1, "expand_queue: calloc");
4038                                         if (strlcpy(n->parent, a->qname,
4039                                             sizeof(n->parent)) >=
4040                                             sizeof(n->parent))
4041                                                 errx(1, "expand_queue strlcpy");
4042                                         if (strlcpy(n->queue, nq->queue,
4043                                             sizeof(n->queue)) >=
4044                                             sizeof(n->queue))
4045                                                 errx(1, "expand_queue strlcpy");
4046                                         if (strlcpy(n->ifname, tqueue->ifname,
4047                                             sizeof(n->ifname)) >=
4048                                             sizeof(n->ifname))
4049                                                 errx(1, "expand_queue strlcpy");
4050                                         n->scheduler = tqueue->scheduler;
4051                                         n->next = NULL;
4052                                         n->tail = n;
4053                                         if (queues == NULL)
4054                                                 queues = n;
4055                                         else {
4056                                                 queues->tail->next = n;
4057                                                 queues->tail = n;
4058                                         }
4059                                 }
4060                                 if ((pf->opts & PF_OPT_VERBOSE) && (
4061                                     (found == 1 && interface->ifname[0] == 0) ||
4062                                     (found > 0 && interface->ifname[0] != 0))) {
4063                                         print_queue(&pf->paltq->altq, 0,
4064                                             &bwspec, interface->ifname[0] != 0,
4065                                             opts);
4066                                         if (nqueues && nqueues->tail) {
4067                                                 printf("{ ");
4068                                                 LOOP_THROUGH(struct node_queue,
4069                                                     queue, nqueues,
4070                                                         printf("%s ",
4071                                                             queue->queue);
4072                                                 );
4073                                                 printf("}");
4074                                         }
4075                                         printf("\n");
4076                                 }
4077                         }
4078                 );
4079         );
4080
4081         FREE_LIST(struct node_queue, nqueues);
4082         FREE_LIST(struct node_if, interfaces);
4083
4084         if (!found) {
4085                 yyerror("queue %s has no parent", a->qname);
4086                 errs++;
4087         }
4088
4089         if (errs)
4090                 return (1);
4091         else
4092                 return (0);
4093 }
4094
4095 void
4096 expand_rule(struct pf_rule *r,
4097     struct node_if *interfaces, struct node_host *rpool_hosts,
4098     struct node_proto *protos, struct node_os *src_oses,
4099     struct node_host *src_hosts, struct node_port *src_ports,
4100     struct node_host *dst_hosts, struct node_port *dst_ports,
4101     struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types)
4102 {
4103         sa_family_t              af = r->af;
4104         int                      added = 0, error = 0;
4105         char                     ifname[IF_NAMESIZE];
4106         char                     label[PF_RULE_LABEL_SIZE];
4107         char                     tagname[PF_TAG_NAME_SIZE];
4108         char                     match_tagname[PF_TAG_NAME_SIZE];
4109         struct pf_pooladdr      *pa;
4110         struct node_host        *h;
4111         u_int8_t                 flags, flagset, keep_state;
4112
4113         if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
4114                 errx(1, "expand_rule: strlcpy");
4115         if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
4116                 errx(1, "expand_rule: strlcpy");
4117         if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
4118             sizeof(match_tagname))
4119                 errx(1, "expand_rule: strlcpy");
4120         flags = r->flags;
4121         flagset = r->flagset;
4122         keep_state = r->keep_state;
4123
4124         LOOP_THROUGH(struct node_if, interface, interfaces,
4125         LOOP_THROUGH(struct node_proto, proto, protos,
4126         LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
4127         LOOP_THROUGH(struct node_host, src_host, src_hosts,
4128         LOOP_THROUGH(struct node_port, src_port, src_ports,
4129         LOOP_THROUGH(struct node_os, src_os, src_oses,
4130         LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
4131         LOOP_THROUGH(struct node_port, dst_port, dst_ports,
4132         LOOP_THROUGH(struct node_uid, uid, uids,
4133         LOOP_THROUGH(struct node_gid, gid, gids,
4134
4135                 r->af = af;
4136                 /* for link-local IPv6 address, interface must match up */
4137                 if ((r->af && src_host->af && r->af != src_host->af) ||
4138                     (r->af && dst_host->af && r->af != dst_host->af) ||
4139                     (src_host->af && dst_host->af &&
4140                     src_host->af != dst_host->af) ||
4141                     (src_host->ifindex && dst_host->ifindex &&
4142                     src_host->ifindex != dst_host->ifindex) ||
4143                     (src_host->ifindex && *interface->ifname &&
4144                     src_host->ifindex != if_nametoindex(interface->ifname)) ||
4145                     (dst_host->ifindex && *interface->ifname &&
4146                     dst_host->ifindex != if_nametoindex(interface->ifname)))
4147                         continue;
4148                 if (!r->af && src_host->af)
4149                         r->af = src_host->af;
4150                 else if (!r->af && dst_host->af)
4151                         r->af = dst_host->af;
4152
4153                 if (*interface->ifname)
4154                         memcpy(r->ifname, interface->ifname, sizeof(r->ifname));
4155                 else if (if_indextoname(src_host->ifindex, ifname))
4156                         memcpy(r->ifname, ifname, sizeof(r->ifname));
4157                 else if (if_indextoname(dst_host->ifindex, ifname))
4158                         memcpy(r->ifname, ifname, sizeof(r->ifname));
4159                 else
4160                         memset(r->ifname, '\0', sizeof(r->ifname));
4161
4162                 if (strlcpy(r->label, label, sizeof(r->label)) >=
4163                     sizeof(r->label))
4164                         errx(1, "expand_rule: strlcpy");
4165                 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
4166                     sizeof(r->tagname))
4167                         errx(1, "expand_rule: strlcpy");
4168                 if (strlcpy(r->match_tagname, match_tagname,
4169                     sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
4170                         errx(1, "expand_rule: strlcpy");
4171                 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
4172                     src_host, src_port, dst_host, dst_port, proto->proto);
4173                 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
4174                     src_host, src_port, dst_host, dst_port, proto->proto);
4175                 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
4176                     r->af, src_host, src_port, dst_host, dst_port,
4177                     proto->proto);
4178
4179                 error += check_netmask(src_host, r->af);
4180                 error += check_netmask(dst_host, r->af);
4181
4182                 r->ifnot = interface->not;
4183                 r->proto = proto->proto;
4184                 r->src.addr = src_host->addr;
4185                 r->src.not = src_host->not;
4186                 r->src.port[0] = src_port->port[0];
4187                 r->src.port[1] = src_port->port[1];
4188                 r->src.port_op = src_port->op;
4189                 r->dst.addr = dst_host->addr;
4190                 r->dst.not = dst_host->not;
4191                 r->dst.port[0] = dst_port->port[0];
4192                 r->dst.port[1] = dst_port->port[1];
4193                 r->dst.port_op = dst_port->op;
4194                 r->uid.op = uid->op;
4195                 r->uid.uid[0] = uid->uid[0];
4196                 r->uid.uid[1] = uid->uid[1];
4197                 r->gid.op = gid->op;
4198                 r->gid.gid[0] = gid->gid[0];
4199                 r->gid.gid[1] = gid->gid[1];
4200                 r->type = icmp_type->type;
4201                 r->code = icmp_type->code;
4202
4203                 if ((keep_state == PF_STATE_MODULATE ||
4204                     keep_state == PF_STATE_SYNPROXY) &&
4205                     r->proto && r->proto != IPPROTO_TCP)
4206                         r->keep_state = PF_STATE_NORMAL;
4207                 else
4208                         r->keep_state = keep_state;
4209
4210                 if (r->proto && r->proto != IPPROTO_TCP) {
4211                         r->flags = 0;
4212                         r->flagset = 0;
4213                 } else {
4214                         r->flags = flags;
4215                         r->flagset = flagset;
4216                 }
4217                 if (icmp_type->proto && r->proto != icmp_type->proto) {
4218                         yyerror("icmp-type mismatch");
4219                         error++;
4220                 }
4221
4222                 if (src_os && src_os->os) {
4223                         r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
4224                         if ((pf->opts & PF_OPT_VERBOSE2) &&
4225                             r->os_fingerprint == PF_OSFP_NOMATCH)
4226                                 fprintf(stderr,
4227                                     "warning: unknown '%s' OS fingerprint\n",
4228                                     src_os->os);
4229                 } else {
4230                         r->os_fingerprint = PF_OSFP_ANY;
4231                 }
4232
4233                 TAILQ_INIT(&r->rpool.list);
4234                 for (h = rpool_hosts; h != NULL; h = h->next) {
4235                         pa = calloc(1, sizeof(struct pf_pooladdr));
4236                         if (pa == NULL)
4237                                 err(1, "expand_rule: calloc");
4238                         pa->addr = h->addr;
4239                         if (h->ifname != NULL) {
4240                                 if (strlcpy(pa->ifname, h->ifname,
4241                                     sizeof(pa->ifname)) >=
4242                                     sizeof(pa->ifname))
4243                                         errx(1, "expand_rule: strlcpy");
4244                         } else
4245                                 pa->ifname[0] = 0;
4246                         TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
4247                 }
4248
4249                 if (rule_consistent(r) < 0 || error)
4250                         yyerror("skipping rule due to errors");
4251                 else {
4252                         r->nr = pf->rule_nr++;
4253                         pfctl_add_rule(pf, r);
4254                         added++;
4255                 }
4256
4257         ))))))))));
4258
4259         FREE_LIST(struct node_if, interfaces);
4260         FREE_LIST(struct node_proto, protos);
4261         FREE_LIST(struct node_host, src_hosts);
4262         FREE_LIST(struct node_port, src_ports);
4263         FREE_LIST(struct node_os, src_oses);
4264         FREE_LIST(struct node_host, dst_hosts);
4265         FREE_LIST(struct node_port, dst_ports);
4266         FREE_LIST(struct node_uid, uids);
4267         FREE_LIST(struct node_gid, gids);
4268         FREE_LIST(struct node_icmp, icmp_types);
4269         FREE_LIST(struct node_host, rpool_hosts);
4270
4271         if (!added)
4272                 yyerror("rule expands to no valid combination");
4273 }
4274
4275 #undef FREE_LIST
4276 #undef LOOP_THROUGH
4277
4278 int
4279 check_rulestate(int desired_state)
4280 {
4281         if (require_order && (rulestate > desired_state)) {
4282                 yyerror("Rules must be in order: options, normalization, "
4283                     "queueing, translation, filtering");
4284                 return (1);
4285         }
4286         rulestate = desired_state;
4287         return (0);
4288 }
4289
4290 int
4291 kw_cmp(const void *k, const void *e)
4292 {
4293         return (strcmp(k, ((const struct keywords *)e)->k_name));
4294 }
4295
4296 int
4297 lookup(char *s)
4298 {
4299         /* this has to be sorted always */
4300         static const struct keywords keywords[] = {
4301                 { "all",                ALL},
4302                 { "allow-opts",         ALLOWOPTS},
4303                 { "altq",               ALTQ},
4304                 { "anchor",             ANCHOR},
4305                 { "antispoof",          ANTISPOOF},
4306                 { "any",                ANY},
4307                 { "bandwidth",          BANDWIDTH},
4308                 { "binat",              BINAT},
4309                 { "binat-anchor",       BINATANCHOR},
4310                 { "bitmask",            BITMASK},
4311                 { "block",              BLOCK},
4312                 { "block-policy",       BLOCKPOLICY},
4313                 { "cbq",                CBQ},
4314                 { "code",               CODE},
4315                 { "crop",               FRAGCROP},
4316                 { "debug",              DEBUG},
4317                 { "drop",               DROP},
4318                 { "drop-ovl",           FRAGDROP},
4319                 { "dup-to",             DUPTO},
4320                 { "fastroute",          FASTROUTE},
4321                 { "file",               FILENAME},
4322                 { "fingerprints",       FINGERPRINTS},
4323                 { "flags",              FLAGS},
4324                 { "floating",           FLOATING},
4325                 { "for",                FOR},
4326                 { "fragment",           FRAGMENT},
4327                 { "from",               FROM},
4328                 { "global",             GLOBAL},
4329                 { "group",              GROUP},
4330                 { "group-bound",        GRBOUND},
4331                 { "hfsc",               HFSC},
4332                 { "hostid",             HOSTID},
4333                 { "icmp-type",          ICMPTYPE},
4334                 { "icmp6-type",         ICMP6TYPE},
4335                 { "if-bound",           IFBOUND},
4336                 { "in",                 IN},
4337                 { "inet",               INET},
4338                 { "inet6",              INET6},
4339                 { "keep",               KEEP},
4340                 { "label",              LABEL},
4341                 { "limit",              LIMIT},
4342                 { "linkshare",          LINKSHARE},
4343                 { "load",               LOAD},
4344                 { "log",                LOG},
4345                 { "log-all",            LOGALL},
4346                 { "loginterface",       LOGINTERFACE},
4347                 { "max",                MAXIMUM},
4348                 { "max-mss",            MAXMSS},
4349                 { "max-src-nodes",      MAXSRCNODES},
4350                 { "max-src-states",     MAXSRCSTATES},
4351                 { "min-ttl",            MINTTL},
4352                 { "modulate",           MODULATE},
4353                 { "nat",                NAT},
4354                 { "nat-anchor",         NATANCHOR},
4355                 { "no",                 NO},
4356                 { "no-df",              NODF},
4357                 { "no-route",           NOROUTE},
4358                 { "no-sync",            NOSYNC},
4359                 { "on",                 ON},
4360                 { "optimization",       OPTIMIZATION},
4361                 { "os",                 OS},
4362                 { "out",                OUT},
4363                 { "pass",               PASS},
4364                 { "port",               PORT},
4365                 { "priority",           PRIORITY},
4366                 { "priq",               PRIQ},
4367                 { "proto",              PROTO},
4368                 { "qlimit",             QLIMIT},
4369                 { "queue",              QUEUE},
4370                 { "quick",              QUICK},
4371                 { "random",             RANDOM},
4372                 { "random-id",          RANDOMID},
4373                 { "rdr",                RDR},
4374                 { "rdr-anchor",         RDRANCHOR},
4375                 { "realtime",           REALTIME},
4376                 { "reassemble",         REASSEMBLE},
4377                 { "reply-to",           REPLYTO},
4378                 { "require-order",      REQUIREORDER},
4379                 { "return",             RETURN},
4380                 { "return-icmp",        RETURNICMP},
4381                 { "return-icmp6",       RETURNICMP6},
4382                 { "return-rst",         RETURNRST},
4383                 { "round-robin",        ROUNDROBIN},
4384                 { "route-to",           ROUTETO},
4385                 { "rule",               RULE},
4386                 { "scrub",              SCRUB},
4387                 { "set",                SET},
4388                 { "source-hash",        SOURCEHASH},
4389                 { "source-track",       SOURCETRACK},
4390                 { "state",              STATE},
4391                 { "state-policy",       STATEPOLICY},
4392                 { "static-port",        STATICPORT},
4393                 { "sticky-address",     STICKYADDRESS},
4394                 { "synproxy",           SYNPROXY},
4395                 { "table",              TABLE},
4396                 { "tag",                TAG},
4397                 { "tagged",             TAGGED},
4398                 { "tbrsize",            TBRSIZE},
4399                 { "timeout",            TIMEOUT},
4400                 { "to",                 TO},
4401                 { "tos",                TOS},
4402                 { "ttl",                TTL},
4403                 { "upperlimit",         UPPERLIMIT},
4404                 { "user",               USER},
4405         };
4406         const struct keywords   *p;
4407
4408         p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
4409             sizeof(keywords[0]), kw_cmp);
4410
4411         if (p) {
4412                 if (debug > 1)
4413                         fprintf(stderr, "%s: %d\n", s, p->k_val);
4414                 return (p->k_val);
4415         } else {
4416                 if (debug > 1)
4417                         fprintf(stderr, "string: %s\n", s);
4418                 return (STRING);
4419         }
4420 }
4421
4422 #define MAXPUSHBACK     128
4423
4424 char    *parsebuf;
4425 int      parseindex;
4426 char     pushback_buffer[MAXPUSHBACK];
4427 int      pushback_index = 0;
4428
4429 int
4430 lgetc(FILE *f)
4431 {
4432         int     c, next;
4433
4434         if (parsebuf) {
4435                 /* Read character from the parsebuffer instead of input. */
4436                 if (parseindex >= 0) {
4437                         c = parsebuf[parseindex++];
4438                         if (c != '\0')
4439                                 return (c);
4440                         parsebuf = NULL;
4441                 } else
4442                         parseindex++;
4443         }
4444
4445         if (pushback_index)
4446                 return (pushback_buffer[--pushback_index]);
4447
4448         while ((c = getc(f)) == '\\') {
4449                 next = getc(f);
4450                 if (next != '\n') {
4451                         if (isspace(next))
4452                                 yyerror("whitespace after \\");
4453                         ungetc(next, f);
4454                         break;
4455                 }
4456                 yylval.lineno = lineno;
4457                 lineno++;
4458         }
4459         if (c == '\t' || c == ' ') {
4460                 /* Compress blanks to a single space. */
4461                 do {
4462                         c = getc(f);
4463                 } while (c == '\t' || c == ' ');
4464                 ungetc(c, f);
4465                 c = ' ';
4466         }
4467
4468         return (c);
4469 }
4470
4471 int
4472 lungetc(int c)
4473 {
4474         if (c == EOF)
4475                 return (EOF);
4476         if (parsebuf) {
4477                 parseindex--;
4478                 if (parseindex >= 0)
4479                         return (c);
4480         }
4481         if (pushback_index < MAXPUSHBACK-1)
4482                 return (pushback_buffer[pushback_index++] = c);
4483         else
4484                 return (EOF);
4485 }
4486
4487 int
4488 findeol(void)
4489 {
4490         int     c;
4491
4492         parsebuf = NULL;
4493         pushback_index = 0;
4494
4495         /* skip to either EOF or the first real EOL */
4496         while (1) {
4497                 c = lgetc(fin);
4498                 if (c == '\n') {
4499                         lineno++;
4500                         break;
4501                 }
4502                 if (c == EOF)
4503                         break;
4504         }
4505         return (ERROR);
4506 }
4507
4508 int
4509 yylex(void)
4510 {
4511         char     buf[8096];
4512         char    *p, *val;
4513         int      endc, c, next;
4514         int      token;
4515
4516 top:
4517         p = buf;
4518         while ((c = lgetc(fin)) == ' ')
4519                 ; /* nothing */
4520
4521         yylval.lineno = lineno;
4522         if (c == '#')
4523                 while ((c = lgetc(fin)) != '\n' && c != EOF)
4524                         ; /* nothing */
4525         if (c == '$' && parsebuf == NULL) {
4526                 while (1) {
4527                         if ((c = lgetc(fin)) == EOF)
4528                                 return (0);
4529
4530                         if (p + 1 >= buf + sizeof(buf) - 1) {
4531                                 yyerror("string too long");
4532                                 return (findeol());
4533                         }
4534                         if (isalnum(c) || c == '_') {
4535                                 *p++ = (char)c;
4536                                 continue;
4537                         }
4538                         *p = '\0';
4539                         lungetc(c);
4540                         break;
4541                 }
4542                 val = symget(buf);
4543                 if (val == NULL) {
4544                         yyerror("macro '%s' not defined", buf);
4545                         return (findeol());
4546                 }
4547                 parsebuf = val;
4548                 parseindex = 0;
4549                 goto top;
4550         }
4551
4552         switch (c) {
4553         case '\'':
4554         case '"':
4555                 endc = c;
4556                 while (1) {
4557                         if ((c = lgetc(fin)) == EOF)
4558                                 return (0);
4559                         if (c == endc) {
4560                                 *p = '\0';
4561                                 break;
4562                         }
4563                         if (c == '\n') {
4564                                 lineno++;
4565                                 continue;
4566                         }
4567                         if (p + 1 >= buf + sizeof(buf) - 1) {
4568                                 yyerror("string too long");
4569                                 return (findeol());
4570                         }
4571                         *p++ = (char)c;
4572                 }
4573                 yylval.v.string = strdup(buf);
4574                 if (yylval.v.string == NULL)
4575                         err(1, "yylex: strdup");
4576                 return (STRING);
4577         case '<':
4578                 next = lgetc(fin);
4579                 if (next == '>') {
4580                         yylval.v.i = PF_OP_XRG;
4581                         return (PORTBINARY);
4582                 }
4583                 lungetc(next);
4584                 break;
4585         case '>':
4586                 next = lgetc(fin);
4587                 if (next == '<') {
4588                         yylval.v.i = PF_OP_IRG;
4589                         return (PORTBINARY);
4590                 }
4591                 lungetc(next);
4592                 break;
4593         case '-':
4594                 next = lgetc(fin);
4595                 if (next == '>')
4596                         return (ARROW);
4597                 lungetc(next);
4598                 break;
4599         }
4600
4601 #define allowed_in_string(x) \
4602         (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
4603         x != '{' && x != '}' && x != '<' && x != '>' && \
4604         x != '!' && x != '=' && x != '/' && x != '#' && \
4605         x != ','))
4606
4607         if (isalnum(c) || c == ':' || c == '_') {
4608                 do {
4609                         *p++ = c;
4610                         if ((unsigned)(p-buf) >= sizeof(buf)) {
4611                                 yyerror("string too long");
4612                                 return (findeol());
4613                         }
4614                 } while ((c = lgetc(fin)) != EOF && (allowed_in_string(c)));
4615                 lungetc(c);
4616                 *p = '\0';
4617                 if ((token = lookup(buf)) == STRING)
4618                         if ((yylval.v.string = strdup(buf)) == NULL)
4619                                 err(1, "yylex: strdup");
4620                 return (token);
4621         }
4622         if (c == '\n') {
4623                 yylval.lineno = lineno;
4624                 lineno++;
4625         }
4626         if (c == EOF)
4627                 return (0);
4628         return (c);
4629 }
4630
4631 int
4632 parse_rules(FILE *input, struct pfctl *xpf)
4633 {
4634         struct sym      *sym, *next;
4635
4636         fin = input;
4637         pf = xpf;
4638         lineno = 1;
4639         errors = 0;
4640         rulestate = PFCTL_STATE_NONE;
4641         returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
4642         returnicmp6default =
4643             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
4644         blockpolicy = PFRULE_DROP;
4645         require_order = 1;
4646
4647         yyparse();
4648
4649         /* Free macros and check which have not been used. */
4650         for (sym = TAILQ_FIRST(&symhead); sym != NULL; sym = next) {
4651                 next = TAILQ_NEXT(sym, entries);
4652                 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
4653                         fprintf(stderr, "warning: macro '%s' not "
4654                             "used\n", sym->nam);
4655                 free(sym->nam);
4656                 free(sym->val);
4657                 TAILQ_REMOVE(&symhead, sym, entries);
4658                 free(sym);
4659         }
4660
4661         return (errors ? -1 : 0);
4662 }
4663
4664 /*
4665  * Over-designed efficiency is a French and German concept, so how about
4666  * we wait until they discover this ugliness and make it all fancy.
4667  */
4668 int
4669 symset(const char *nam, const char *val, int persist)
4670 {
4671         struct sym      *sym;
4672
4673         for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
4674             sym = TAILQ_NEXT(sym, entries))
4675                 ;       /* nothing */
4676
4677         if (sym != NULL) {
4678                 if (sym->persist == 1)
4679                         return (0);
4680                 else {
4681                         free(sym->nam);
4682                         free(sym->val);
4683                         TAILQ_REMOVE(&symhead, sym, entries);
4684                         free(sym);
4685                 }
4686         }
4687         if ((sym = calloc(1, sizeof(*sym))) == NULL)
4688                 return (-1);
4689
4690         sym->nam = strdup(nam);
4691         if (sym->nam == NULL) {
4692                 free(sym);
4693                 return (-1);
4694         }
4695         sym->val = strdup(val);
4696         if (sym->val == NULL) {
4697                 free(sym->nam);
4698                 free(sym);
4699                 return (-1);
4700         }
4701         sym->used = 0;
4702         sym->persist = persist;
4703         TAILQ_INSERT_TAIL(&symhead, sym, entries);
4704         return (0);
4705 }
4706
4707 int
4708 pfctl_cmdline_symset(char *s)
4709 {
4710         char    *sym, *val;
4711         int      ret;
4712
4713         if ((val = strrchr(s, '=')) == NULL)
4714                 return (-1);
4715
4716         if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
4717                 err(1, "pfctl_cmdline_symset: malloc");
4718
4719         strlcpy(sym, s, strlen(s) - strlen(val) + 1);
4720
4721         ret = symset(sym, val + 1, 1);
4722         free(sym);
4723
4724         return (ret);
4725 }
4726
4727 char *
4728 symget(const char *nam)
4729 {
4730         struct sym      *sym;
4731
4732         TAILQ_FOREACH(sym, &symhead, entries)
4733                 if (strcmp(nam, sym->nam) == 0) {
4734                         sym->used = 1;
4735                         return (sym->val);
4736                 }
4737         return (NULL);
4738 }
4739
4740 void
4741 decide_address_family(struct node_host *n, sa_family_t *af)
4742 {
4743         sa_family_t     target_af = 0;
4744
4745         while (!*af && n != NULL) {
4746                 if (n->af) {
4747                         if (target_af == 0)
4748                                 target_af = n->af;
4749                         if (target_af != n->af)
4750                                 return;
4751                 }
4752                 n = n->next;
4753         }
4754         if (!*af && target_af)
4755                 *af = target_af;
4756 }
4757
4758 void
4759 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
4760 {
4761         struct node_host        *n = *nh, *prev = NULL;
4762
4763         while (n != NULL) {
4764                 if (*af && n->af && n->af != *af) {
4765                         /* unlink and free n */
4766                         struct node_host *next = n->next;
4767
4768                         /* adjust tail pointer */
4769                         if (n == (*nh)->tail)
4770                                 (*nh)->tail = prev;
4771                         /* adjust previous node's next pointer */
4772                         if (prev == NULL)
4773                                 *nh = next;
4774                         else
4775                                 prev->next = next;
4776                         /* free node */
4777                         if (n->ifname != NULL)
4778                                 free(n->ifname);
4779                         free(n);
4780                         n = next;
4781                 } else {
4782                         if (n->af && !*af)
4783                                 *af = n->af;
4784                         prev = n;
4785                         n = n->next;
4786                 }
4787         }
4788 }
4789
4790 int
4791 invalid_redirect(struct node_host *nh, sa_family_t af)
4792 {
4793         if (!af) {
4794                 struct node_host *n;
4795
4796                 /* tables and dyniftl are ok without an address family */
4797                 for (n = nh; n != NULL; n = n->next) {
4798                         if (n->addr.type != PF_ADDR_TABLE &&
4799                             n->addr.type != PF_ADDR_DYNIFTL) {
4800                                 yyerror("address family not given and "
4801                                     "translation address expands to multiple "
4802                                     "address families");
4803                                 return (1);
4804                         }
4805                 }
4806         }
4807         if (nh == NULL) {
4808                 yyerror("no translation address with matching address family "
4809                     "found.");
4810                 return (1);
4811         }
4812         return (0);
4813 }
4814
4815 int
4816 atoul(char *s, u_long *ulvalp)
4817 {
4818         u_long   ulval;
4819         char    *ep;
4820
4821         errno = 0;
4822         ulval = strtoul(s, &ep, 0);
4823         if (s[0] == '\0' || *ep != '\0')
4824                 return (-1);
4825         if (errno == ERANGE && ulval == ULONG_MAX)
4826                 return (-1);
4827         *ulvalp = ulval;
4828         return (0);
4829 }
4830
4831 int
4832 getservice(char *n)
4833 {
4834         struct servent  *s;
4835         u_long           ulval;
4836
4837         if (atoul(n, &ulval) == 0) {
4838                 if (ulval > 65535) {
4839                         yyerror("illegal port value %d", ulval);
4840                         return (-1);
4841                 }
4842                 return (htons(ulval));
4843         } else {
4844                 s = getservbyname(n, "tcp");
4845                 if (s == NULL)
4846                         s = getservbyname(n, "udp");
4847                 if (s == NULL) {
4848                         yyerror("unknown port %s", n);
4849                         return (-1);
4850                 }
4851                 return (s->s_port);
4852         }
4853 }
4854
4855 int
4856 rule_label(struct pf_rule *r, char *s)
4857 {
4858         if (s) {
4859                 if (strlcpy(r->label, s, sizeof(r->label)) >=
4860                     sizeof(r->label)) {
4861                         yyerror("rule label too long (max %d chars)",
4862                             sizeof(r->label)-1);
4863                         return (-1);
4864                 }
4865         }
4866         return (0);
4867 }
4868
4869 u_int16_t
4870 parseicmpspec(char *w, sa_family_t af)
4871 {
4872         const struct icmpcodeent        *p;
4873         u_long                           ulval;
4874         u_int8_t                         icmptype;
4875
4876         if (af == AF_INET)
4877                 icmptype = returnicmpdefault >> 8;
4878         else
4879                 icmptype = returnicmp6default >> 8;
4880
4881         if (atoul(w, &ulval) == -1) {
4882                 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
4883                         yyerror("unknown icmp code %s", w);
4884                         return (0);
4885                 }
4886                 ulval = p->code;
4887         }
4888         if (ulval > 255) {
4889                 yyerror("invalid icmp code %ld", ulval);
4890                 return (0);
4891         }
4892         return (icmptype << 8 | ulval);
4893 }
4894
4895 int
4896 pfctl_load_anchors(int dev, int opts, struct pfr_buffer *trans)
4897 {
4898         struct loadanchors      *la;
4899
4900         TAILQ_FOREACH(la, &loadanchorshead, entries) {
4901                 if (opts & PF_OPT_VERBOSE)
4902                         fprintf(stderr, "\nLoading anchor %s:%s from %s\n",
4903                             la->anchorname, la->rulesetname, la->filename);
4904                 if (pfctl_rules(dev, la->filename, opts, la->anchorname,
4905                     la->rulesetname, trans) == -1)
4906                         return (-1);
4907         }
4908
4909         return (0);
4910 }
4911