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 1.1 2004/09/21 21:25:28 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/param.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 #ifndef __DragonFly__
  42 #include <altq/altq.h>
  43 #include <altq/altq_cbq.h>
  44 #include <altq/altq_priq.h>
  45 #include <altq/altq_hfsc.h>
  46 #endif
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <netdb.h>
  50 #include <stdarg.h>
  51 #include <errno.h>
  52 #include <string.h>
  53 #include <ctype.h>
  54 #include <err.h>
  55 #include <limits.h>
  56 #include <pwd.h>
  57 #include <grp.h>
  58 #include <md5.h>
  59
  60 #include "pfctl_parser.h"
  61 #include "pfctl.h"
  62
  63 static struct pfctl     *pf = NULL;
  64 static FILE             *fin = NULL;
  65 static int               debug = 0;
  66 static int               lineno = 1;
  67 static int               errors = 0;
  68 static int               rulestate = 0;
  69 static u_int16_t         returnicmpdefault =
  70                             (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
  71 static u_int16_t         returnicmp6default =
  72                             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
  73 static int               blockpolicy = PFRULE_DROP;
  74 static int               require_order = 1;
  75 static int               default_statelock;
  76
  77 enum {
  78         PFCTL_STATE_NONE,
  79         PFCTL_STATE_OPTION,
  80         PFCTL_STATE_SCRUB,
  81         PFCTL_STATE_QUEUE,
  82         PFCTL_STATE_NAT,
  83         PFCTL_STATE_FILTER
  84 };
  85
  86 struct node_proto {
  87         u_int8_t                 proto;
  88         struct node_proto       *next;
  89         struct node_proto       *tail;
  90 };
  91
  92 struct node_port {
  93         u_int16_t                port[2];
  94         u_int8_t                 op;
  95         struct node_port        *next;
  96         struct node_port        *tail;
  97 };
  98
  99 struct node_uid {
 100         uid_t                    uid[2];
 101         u_int8_t                 op;
 102         struct node_uid         *next;
 103         struct node_uid         *tail;
 104 };
 105
 106 struct node_gid {
 107         gid_t                    gid[2];
 108         u_int8_t                 op;
 109         struct node_gid         *next;
 110         struct node_gid         *tail;
 111 };
 112
 113 struct node_icmp {
 114         u_int8_t                 code;
 115         u_int8_t                 type;
 116         u_int8_t                 proto;
 117         struct node_icmp        *next;
 118         struct node_icmp        *tail;
 119 };
 120
 121 enum    { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
 122             PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_NODES,
 123             PF_STATE_OPT_STATELOCK, PF_STATE_OPT_TIMEOUT };
 124
 125 enum    { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
 126
 127 struct node_state_opt {
 128         int                      type;
 129         union {
 130                 u_int32_t        max_states;
 131                 u_int32_t        max_src_states;
 132                 u_int32_t        max_src_nodes;
 133                 u_int8_t         src_track;
 134                 u_int32_t        statelock;
 135                 struct {
 136                         int             number;
 137                         u_int32_t       seconds;
 138                 }                timeout;
 139         }                        data;
 140         struct node_state_opt   *next;
 141         struct node_state_opt   *tail;
 142 };
 143
 144 struct peer {
 145         struct node_host        *host;
 146         struct node_port        *port;
 147 };
 148
 149 struct node_queue {
 150         char                     queue[PF_QNAME_SIZE];
 151         char                     parent[PF_QNAME_SIZE];
 152         char                     ifname[IFNAMSIZ];
 153         int                      scheduler;
 154         struct node_queue       *next;
 155         struct node_queue       *tail;
 156 }       *queues = NULL;
 157
 158 struct node_qassign {
 159         char            *qname;
 160         char            *pqname;
 161 };
 162
 163 struct filter_opts {
 164         int                      marker;
 165 #define FOM_FLAGS       0x01
 166 #define FOM_ICMP        0x02
 167 #define FOM_TOS         0x04
 168 #define FOM_KEEP        0x08
 169 #define FOM_SRCTRACK    0x10
 170         struct node_uid         *uid;
 171         struct node_gid         *gid;
 172         struct {
 173                 u_int8_t         b1;
 174                 u_int8_t         b2;
 175                 u_int16_t        w;
 176                 u_int16_t        w2;
 177         } flags;
 178         struct node_icmp        *icmpspec;
 179         u_int32_t                tos;
 180         struct {
 181                 int                      action;
 182                 struct node_state_opt   *options;
 183         } keep;
 184         int                      fragment;
 185         int                      allowopts;
 186         char                    *label;
 187         struct node_qassign      queues;
 188         char                    *tag;
 189         char                    *match_tag;
 190         u_int8_t                 match_tag_not;
 191 } filter_opts;
 192
 193 struct antispoof_opts {
 194         char                    *label;
 195 } antispoof_opts;
 196
 197 struct scrub_opts {
 198         int                     marker;
 199 #define SOM_MINTTL      0x01
 200 #define SOM_MAXMSS      0x02
 201 #define SOM_FRAGCACHE   0x04
 202         int                     nodf;
 203         int                     minttl;
 204         int                     maxmss;
 205         int                     fragcache;
 206         int                     randomid;
 207         int                     reassemble_tcp;
 208 } scrub_opts;
 209
 210 struct queue_opts {
 211         int                     marker;
 212 #define QOM_BWSPEC      0x01
 213 #define QOM_SCHEDULER   0x02
 214 #define QOM_PRIORITY    0x04
 215 #define QOM_TBRSIZE     0x08
 216 #define QOM_QLIMIT      0x10
 217         struct node_queue_bw    queue_bwspec;
 218         struct node_queue_opt   scheduler;
 219         int                     priority;
 220         int                     tbrsize;
 221         int                     qlimit;
 222 } queue_opts;
 223
 224 struct table_opts {
 225         int                     flags;
 226         int                     init_addr;
 227         struct node_tinithead   init_nodes;
 228 } table_opts;
 229
 230 struct pool_opts {
 231         int                      marker;
 232 #define POM_TYPE                0x01
 233 #define POM_STICKYADDRESS       0x02
 234         u_int8_t                 opts;
 235         int                      type;
 236         int                      staticport;
 237         struct pf_poolhashkey   *key;
 238
 239 } pool_opts;
 240
 241
 242 struct node_hfsc_opts   hfsc_opts;
 243
 244 int     yyerror(const char *, ...);
 245 int     disallow_table(struct node_host *, const char *);
 246 int     disallow_alias(struct node_host *, const char *);
 247 int     rule_consistent(struct pf_rule *);
 248 int     filter_consistent(struct pf_rule *);
 249 int     nat_consistent(struct pf_rule *);
 250 int     rdr_consistent(struct pf_rule *);
 251 int     process_tabledef(char *, struct table_opts *);
 252 int     yyparse(void);
 253 void    expand_label_str(char *, size_t, const char *, const char *);
 254 void    expand_label_if(const char *, char *, size_t, const char *);
 255 void    expand_label_addr(const char *, char *, size_t, u_int8_t,
 256             struct node_host *);
 257 void    expand_label_port(const char *, char *, size_t, struct node_port *);
 258 void    expand_label_proto(const char *, char *, size_t, u_int8_t);
 259 void    expand_label_nr(const char *, char *, size_t);
 260 void    expand_label(char *, size_t, const char *, u_int8_t, struct node_host *,
 261             struct node_port *, struct node_host *, struct node_port *,
 262             u_int8_t);
 263 void    expand_rule(struct pf_rule *, struct node_if *, struct node_host *,
 264             struct node_proto *, struct node_os*, struct node_host *,
 265             struct node_port *, struct node_host *, struct node_port *,
 266             struct node_uid *, struct node_gid *, struct node_icmp *);
 267 int     expand_altq(struct pf_altq *, struct node_if *, struct node_queue *,
 268             struct node_queue_bw bwspec, struct node_queue_opt *);
 269 int     expand_queue(struct pf_altq *, struct node_if *, struct node_queue *,
 270             struct node_queue_bw, struct node_queue_opt *);
 271
 272 int      check_rulestate(int);
 273 int      kw_cmp(const void *, const void *);
 274 int      lookup(char *);
 275 int      lgetc(FILE *);
 276 int      lungetc(int);
 277 int      findeol(void);
 278 int      yylex(void);
 279 int      atoul(char *, u_long *);
 280 int      getservice(char *);
 281 int      rule_label(struct pf_rule *, char *);
 282
 283 TAILQ_HEAD(symhead, sym)         symhead = TAILQ_HEAD_INITIALIZER(symhead);
 284 struct sym {
 285         TAILQ_ENTRY(sym)         entries;
 286         int                      used;
 287         int                      persist;
 288         char                    *nam;
 289         char                    *val;
 290 };
 291
 292
 293 int      symset(const char *, const char *, int);
 294 char    *symget(const char *);
 295
 296 void     decide_address_family(struct node_host *, sa_family_t *);
 297 void     remove_invalid_hosts(struct node_host **, sa_family_t *);
 298 int      invalid_redirect(struct node_host *, sa_family_t);
 299 u_int16_t parseicmpspec(char *, sa_family_t);
 300
 301 TAILQ_HEAD(loadanchorshead, loadanchors)
 302     loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
 303
 304 struct loadanchors {
 305         TAILQ_ENTRY(loadanchors)         entries;
 306         char                            *anchorname;
 307         char                            *rulesetname;
 308         char                            *filename;
 309 };
 310
 311 typedef struct {
 312         union {
 313                 u_int32_t                number;
 314                 int                      i;
 315                 char                    *string;
 316                 struct {
 317                         u_int8_t         b1;
 318                         u_int8_t         b2;
 319                         u_int16_t        w;
 320                         u_int16_t        w2;
 321                 }                        b;
 322                 struct range {
 323                         int              a;
 324                         int              b;
 325                         int              t;
 326                 }                        range;
 327                 struct node_if          *interface;
 328                 struct node_proto       *proto;
 329                 struct node_icmp        *icmp;
 330                 struct node_host        *host;
 331                 struct node_os          *os;
 332                 struct node_port        *port;
 333                 struct node_uid         *uid;
 334                 struct node_gid         *gid;
 335                 struct node_state_opt   *state_opt;
 336                 struct peer              peer;
 337                 struct {
 338                         struct peer      src, dst;
 339                         struct node_os  *src_os;
 340                 }                        fromto;
 341                 struct {
 342                         struct node_host        *host;
 343                         u_int8_t                 rt;
 344                         u_int8_t                 pool_opts;
 345                         sa_family_t              af;
 346                         struct pf_poolhashkey   *key;
 347                 }                        route;
 348                 struct redirection {
 349                         struct node_host        *host;
 350                         struct range             rport;
 351                 }                       *redirection;
 352                 struct {
 353                         int                      action;
 354                         struct node_state_opt   *options;
 355                 }                        keep_state;
 356                 struct {
 357                         u_int8_t         log;
 358                         u_int8_t         quick;
 359                 }                        logquick;
 360                 struct pf_poolhashkey   *hashkey;
 361                 struct node_queue       *queue;
 362                 struct node_queue_opt    queue_options;
 363                 struct node_queue_bw     queue_bwspec;
 364                 struct node_qassign      qassign;
 365                 struct filter_opts       filter_opts;
 366                 struct antispoof_opts    antispoof_opts;
 367                 struct queue_opts        queue_opts;
 368                 struct scrub_opts        scrub_opts;
 369                 struct table_opts        table_opts;
 370                 struct pool_opts         pool_opts;
 371                 struct node_hfsc_opts    hfsc_opts;
 372         } v;
 373         int lineno;
 374 } YYSTYPE;
 375
 376 #define PREPARE_ANCHOR_RULE(r, a)                               \
 377         do {                                                    \
 378                 memset(&(r), 0, sizeof(r));                     \
 379                 if (strlcpy(r.anchorname, (a),                  \
 380                     sizeof(r.anchorname)) >=                    \
 381                     sizeof(r.anchorname)) {                     \
 382                         yyerror("anchor name '%s' too long",    \
 383                             (a));                               \
 384                         YYERROR;                                \
 385                 }                                               \
 386         } while (0)
 387
 388 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
 389         (!((addr).iflags & PFI_AFLAG_NOALIAS) ||                 \
 390         !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
 391
 392 extern const char       *infile;
 393
 394 %}
 395
 396 %token  PASS BLOCK SCRUB RETURN IN OS OUT LOG LOGALL QUICK ON FROM TO FLAGS
 397 %token  RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
 398 %token  ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
 399 %token  MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
 400 %token  NOROUTE FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
 401 %token  REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
 402 %token  SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
 403 %token  REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG HOSTID
 404 %token  ANTISPOOF FOR
 405 %token  BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT
 406 %token  ALTQ CBQ PRIQ HFSC BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT
 407 %token  QUEUE PRIORITY QLIMIT
 408 %token  LOAD
 409 %token  STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
 410 %token  TAGGED TAG IFBOUND GRBOUND FLOATING STATEPOLICY
 411 %token  <v.string>              STRING
 412 %token  <v.i>                   PORTBINARY
 413 %type   <v.interface>           interface if_list if_item_not if_item
 414 %type   <v.number>              number icmptype icmp6type uid gid
 415 %type   <v.number>              tos not yesno natpass
 416 %type   <v.i>                   no dir log af fragcache sourcetrack
 417 %type   <v.i>                   unaryop statelock
 418 %type   <v.b>                   action nataction flags flag blockspec
 419 %type   <v.range>               port rport
 420 %type   <v.hashkey>             hashkey
 421 %type   <v.proto>               proto proto_list proto_item
 422 %type   <v.icmp>                icmpspec
 423 %type   <v.icmp>                icmp_list icmp_item
 424 %type   <v.icmp>                icmp6_list icmp6_item
 425 %type   <v.fromto>              fromto
 426 %type   <v.peer>                ipportspec from to
 427 %type   <v.host>                ipspec xhost host dynaddr host_list
 428 %type   <v.host>                redir_host_list redirspec
 429 %type   <v.host>                route_host route_host_list routespec
 430 %type   <v.os>                  os xos os_list
 431 %type   <v.port>                portspec port_list port_item
 432 %type   <v.uid>                 uids uid_list uid_item
 433 %type   <v.gid>                 gids gid_list gid_item
 434 %type   <v.route>               route
 435 %type   <v.redirection>         redirection redirpool
 436 %type   <v.string>              label string tag
 437 %type   <v.keep_state>          keep
 438 %type   <v.state_opt>           state_opt_spec state_opt_list state_opt_item
 439 %type   <v.logquick>            logquick
 440 %type   <v.interface>           antispoof_ifspc antispoof_iflst
 441 %type   <v.filter_opts>         filter_opts filter_opt filter_opts_l
 442 %type   <v.antispoof_opts>      antispoof_opts antispoof_opt antispoof_opts_l
 443 %type   <v.scrub_opts>          scrub_opts scrub_opt scrub_opts_l
 444 %type   <v.table_opts>          table_opts table_opt table_opts_l
 445 %type   <v.pool_opts>           pool_opts pool_opt pool_opts_l
 446 %%
 447
 448 ruleset         : /* empty */
 449                 | ruleset '\n'
 450                 | ruleset option '\n'
 451                 | ruleset scrubrule '\n'
 452                 | ruleset natrule '\n'
 453                 | ruleset binatrule '\n'
 454                 | ruleset pfrule '\n'
 455                 | ruleset anchorrule '\n'
 456                 | ruleset loadrule '\n'
 457                 /*| ruleset altqif '\n'
 458                 | ruleset queuespec '\n'*/
 459                 | ruleset varset '\n'
 460                 | ruleset antispoof '\n'
 461                 | ruleset tabledef '\n'
 462                 | ruleset error '\n'            { errors++; }
 463                 ;
 464
 465 option          : SET OPTIMIZATION STRING               {
 466                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 467                                 free($3);
 468                                 YYERROR;
 469                         }
 470                         if (pfctl_set_optimization(pf, $3) != 0) {
 471                                 yyerror("unknown optimization %s", $3);
 472                                 free($3);
 473                                 YYERROR;
 474                         }
 475                         free ($3);
 476                 }
 477                 | SET TIMEOUT timeout_spec
 478                 | SET TIMEOUT '{' timeout_list '}'
 479                 | SET LIMIT limit_spec
 480                 | SET LIMIT '{' limit_list '}'
 481                 | SET LOGINTERFACE STRING               {
 482                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 483                                 free($3);
 484                                 YYERROR;
 485                         }
 486                         if ((ifa_exists($3, 0) == NULL) && strcmp($3, "none")) {
 487                                 yyerror("interface %s doesn't exist", $3);
 488                                 free($3);
 489                                 YYERROR;
 490                         }
 491                         if (pfctl_set_logif(pf, $3) != 0) {
 492                                 yyerror("error setting loginterface %s", $3);
 493                                 free($3);
 494                                 YYERROR;
 495                         }
 496                         free($3);
 497                 }
 498                 | SET HOSTID number {
 499                         if ($3 == 0) {
 500                                 yyerror("hostid must be non-zero");
 501                                 YYERROR;
 502                         }
 503                         if (pfctl_set_hostid(pf, $3) != 0) {
 504                                 yyerror("error setting loginterface %08x", $3);
 505                                 YYERROR;
 506                         }
 507                 }
 508                 | SET BLOCKPOLICY DROP  {
 509                         if (pf->opts & PF_OPT_VERBOSE)
 510                                 printf("set block-policy drop\n");
 511                         if (check_rulestate(PFCTL_STATE_OPTION))
 512                                 YYERROR;
 513                         blockpolicy = PFRULE_DROP;
 514                 }
 515                 | SET BLOCKPOLICY RETURN {
 516                         if (pf->opts & PF_OPT_VERBOSE)
 517                                 printf("set block-policy return\n");
 518                         if (check_rulestate(PFCTL_STATE_OPTION))
 519                                 YYERROR;
 520                         blockpolicy = PFRULE_RETURN;
 521                 }
 522                 | SET REQUIREORDER yesno {
 523                         if (pf->opts & PF_OPT_VERBOSE)
 524                                 printf("set require-order %s\n",
 525                                     $3 == 1 ? "yes" : "no");
 526                         require_order = $3;
 527                 }
 528                 | SET FINGERPRINTS STRING {
 529                         if (pf->opts & PF_OPT_VERBOSE)
 530                                 printf("fingerprints %s\n", $3);
 531                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 532                                 free($3);
 533                                 YYERROR;
 534                         }
 535                         if (pfctl_file_fingerprints(pf->dev, pf->opts, $3)) {
 536                                 yyerror("error loading fingerprints %s", $3);
 537                                 free($3);
 538                                 YYERROR;
 539                         }
 540                         free($3);
 541                 }
 542                 | SET STATEPOLICY statelock {
 543                         if (pf->opts & PF_OPT_VERBOSE)
 544                                 switch ($3) {
 545                                 case 0:
 546                                         printf("set state-policy floating\n");
 547                                         break;
 548                                 case PFRULE_IFBOUND:
 549                                         printf("set state-policy if-bound\n");
 550                                         break;
 551                                 case PFRULE_GRBOUND:
 552                                         printf("set state-policy "
 553                                             "group-bound\n");
 554                                         break;
 555                                 }
 556                         default_statelock = $3;
 557                 }
 558                 | SET DEBUG STRING {
 559                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 560                                 free($3);
 561                                 YYERROR;
 562                         }
 563                         if (pfctl_set_debug(pf, $3) != 0) {
 564                                 yyerror("error setting debuglevel %s", $3);
 565                                 free($3);
 566                                 YYERROR;
 567                         }
 568                         free($3);
 569                 }
 570                 ;
 571
 572 string          : string STRING                         {
 573                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 574                                 err(1, "string: asprintf");
 575                         free($1);
 576                         free($2);
 577                 }
 578                 | STRING
 579                 ;
 580
 581 varset          : STRING '=' string             {
 582                         if (pf->opts & PF_OPT_VERBOSE)
 583                                 printf("%s = \"%s\"\n", $1, $3);
 584                         if (symset($1, $3, 0) == -1)
 585                                 err(1, "cannot store variable %s", $1);
 586                         free($1);
 587                         free($3);
 588                 }
 589                 ;
 590
 591 anchorrule      : ANCHOR string dir interface af proto fromto filter_opts {
 592                         struct pf_rule  r;
 593
 594                         if (check_rulestate(PFCTL_STATE_FILTER)) {
 595                                 free($2);
 596                                 YYERROR;
 597                         }
 598
 599                         PREPARE_ANCHOR_RULE(r, $2);
 600                         r.direction = $3;
 601                         r.af = $5;
 602
 603                         if ($8.match_tag)
 604                                 if (strlcpy(r.match_tagname, $8.match_tag,
 605                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 606                                         yyerror("tag too long, max %u chars",
 607                                             PF_TAG_NAME_SIZE - 1);
 608                                         YYERROR;
 609                                 }
 610                         r.match_tag_not = $8.match_tag_not;
 611
 612                         decide_address_family($7.src.host, &r.af);
 613                         decide_address_family($7.dst.host, &r.af);
 614
 615                         expand_rule(&r, $4, NULL, $6, $7.src_os,
 616                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
 617                             0, 0, 0);
 618                 }
 619                 | NATANCHOR string interface af proto fromto {
 620                         struct pf_rule  r;
 621
 622                         if (check_rulestate(PFCTL_STATE_NAT)) {
 623                                 free($2);
 624                                 YYERROR;
 625                         }
 626
 627                         PREPARE_ANCHOR_RULE(r, $2);
 628                         free($2);
 629                         r.action = PF_NAT;
 630                         r.af = $4;
 631
 632                         decide_address_family($6.src.host, &r.af);
 633                         decide_address_family($6.dst.host, &r.af);
 634
 635                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 636                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 637                             0, 0, 0);
 638                 }
 639                 | RDRANCHOR string interface af proto fromto {
 640                         struct pf_rule  r;
 641
 642                         if (check_rulestate(PFCTL_STATE_NAT)) {
 643                                 free($2);
 644                                 YYERROR;
 645                         }
 646
 647                         PREPARE_ANCHOR_RULE(r, $2);
 648                         free($2);
 649                         r.action = PF_RDR;
 650                         r.af = $4;
 651
 652                         decide_address_family($6.src.host, &r.af);
 653                         decide_address_family($6.dst.host, &r.af);
 654
 655                         if ($6.src.port != NULL) {
 656                                 yyerror("source port parameter not supported"
 657                                     " in rdr-anchor");
 658                                 YYERROR;
 659                         }
 660                         if ($6.dst.port != NULL) {
 661                                 if ($6.dst.port->next != NULL) {
 662                                         yyerror("destination port list "
 663                                             "expansion not supported in "
 664                                             "rdr-anchor");
 665                                         YYERROR;
 666                                 } else if ($6.dst.port->op != PF_OP_EQ) {
 667                                         yyerror("destination port operators"
 668                                             " not supported in rdr-anchor");
 669                                         YYERROR;
 670                                 }
 671                                 r.dst.port[0] = $6.dst.port->port[0];
 672                                 r.dst.port[1] = $6.dst.port->port[1];
 673                                 r.dst.port_op = $6.dst.port->op;
 674                         }
 675
 676                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 677                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 678                             0, 0, 0);
 679                 }
 680                 | BINATANCHOR string interface af proto fromto {
 681                         struct pf_rule  r;
 682
 683                         if (check_rulestate(PFCTL_STATE_NAT)) {
 684                                 free($2);
 685                                 YYERROR;
 686                         }
 687
 688                         PREPARE_ANCHOR_RULE(r, $2);
 689                         free($2);
 690                         r.action = PF_BINAT;
 691                         r.af = $4;
 692                         if ($5 != NULL) {
 693                                 if ($5->next != NULL) {
 694                                         yyerror("proto list expansion"
 695                                             " not supported in binat-anchor");
 696                                         YYERROR;
 697                                 }
 698                                 r.proto = $5->proto;
 699                                 free($5);
 700                         }
 701
 702                         if ($6.src.host != NULL || $6.src.port != NULL ||
 703                             $6.dst.host != NULL || $6.dst.port != NULL) {
 704                                 yyerror("fromto parameter not supported"
 705                                     " in binat-anchor");
 706                                 YYERROR;
 707                         }
 708
 709                         decide_address_family($6.src.host, &r.af);
 710                         decide_address_family($6.dst.host, &r.af);
 711
 712                         pfctl_add_rule(pf, &r);
 713                 }
 714                 ;
 715
 716 loadrule        : LOAD ANCHOR string FROM string        {
 717                         char                    *t;
 718                         struct loadanchors      *loadanchor;
 719
 720                         t = strsep(&$3, ":");
 721                         if (*t == '\0' || $3 == NULL || *$3 == '\0') {
 722                                 yyerror("anchor '%s' invalid\n", $3);
 723                                 free(t);
 724                                 YYERROR;
 725                         }
 726                         if (strlen(t) >= PF_ANCHOR_NAME_SIZE) {
 727                                 yyerror("anchorname %s too long, max %u\n",
 728                                     t, PF_ANCHOR_NAME_SIZE - 1);
 729                                 free(t);
 730                                 YYERROR;
 731                         }
 732                         if (strlen($3) >= PF_RULESET_NAME_SIZE) {
 733                                 yyerror("rulesetname %s too long, max %u\n",
 734                                     $3, PF_RULESET_NAME_SIZE - 1);
 735                                 free(t);
 736                                 YYERROR;
 737                         }
 738
 739                         loadanchor = calloc(1, sizeof(struct loadanchors));
 740                         if (loadanchor == NULL)
 741                                 err(1, "loadrule: calloc");
 742                         if ((loadanchor->anchorname = strdup(t)) == NULL)
 743                                 err(1, "loadrule: strdup");
 744                         if ((loadanchor->rulesetname = strdup($3)) == NULL)
 745                                 err(1, "loadrule: strdup");
 746                         if ((loadanchor->filename = strdup($5)) == NULL)
 747                                 err(1, "loadrule: strdup");
 748
 749                         TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
 750                             entries);
 751
 752                         free(t); /* not $3 */
 753                         free($5);
 754                 };
 755
 756 scrubrule       : SCRUB dir logquick interface af proto fromto scrub_opts
 757                 {
 758                         struct pf_rule  r;
 759
 760                         if (check_rulestate(PFCTL_STATE_SCRUB))
 761                                 YYERROR;
 762
 763                         memset(&r, 0, sizeof(r));
 764
 765                         r.action = PF_SCRUB;
 766                         r.direction = $2;
 767
 768                         r.log = $3.log;
 769                         if ($3.quick) {
 770                                 yyerror("scrub rules do not support 'quick'");
 771                                 YYERROR;
 772                         }
 773
 774                         r.af = $5;
 775                         if ($8.nodf)
 776                                 r.rule_flag |= PFRULE_NODF;
 777                         if ($8.randomid)
 778                                 r.rule_flag |= PFRULE_RANDOMID;
 779                         if ($8.reassemble_tcp) {
 780                                 if (r.direction != PF_INOUT) {
 781                                         yyerror("reassemble tcp rules can not "
 782                                             "specify direction");
 783                                         YYERROR;
 784                                 }
 785                                 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
 786                         }
 787                         if ($8.minttl)
 788                                 r.min_ttl = $8.minttl;
 789                         if ($8.maxmss)
 790                                 r.max_mss = $8.maxmss;
 791                         if ($8.fragcache)
 792                                 r.rule_flag |= $8.fragcache;
 793
 794                         expand_rule(&r, $4, NULL, $6, $7.src_os,
 795                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
 796                             NULL, NULL, NULL);
 797                 }
 798                 ;
 799
 800 scrub_opts      :       {
 801                         bzero(&scrub_opts, sizeof scrub_opts);
 802                 }
 803                     scrub_opts_l
 804                         { $$ = scrub_opts; }
 805                 | /* empty */ {
 806                         bzero(&scrub_opts, sizeof scrub_opts);
 807                         $$ = scrub_opts;
 808                 }
 809                 ;
 810
 811 scrub_opts_l    : scrub_opts_l scrub_opt
 812                 | scrub_opt
 813                 ;
 814
 815 scrub_opt       : NODF  {
 816                         if (scrub_opts.nodf) {
 817                                 yyerror("no-df cannot be respecified");
 818                                 YYERROR;
 819                         }
 820                         scrub_opts.nodf = 1;
 821                 }
 822                 | MINTTL number {
 823                         if (scrub_opts.marker & SOM_MINTTL) {
 824                                 yyerror("min-ttl cannot be respecified");
 825                                 YYERROR;
 826                         }
 827                         if ($2 > 255) {
 828                                 yyerror("illegal min-ttl value %d", $2);
 829                                 YYERROR;
 830                         }
 831                         scrub_opts.marker |= SOM_MINTTL;
 832                         scrub_opts.minttl = $2;
 833                 }
 834                 | MAXMSS number {
 835                         if (scrub_opts.marker & SOM_MAXMSS) {
 836                                 yyerror("max-mss cannot be respecified");
 837                                 YYERROR;
 838                         }
 839                         if ($2 > 65535) {
 840                                 yyerror("illegal max-mss value %d", $2);
 841                                 YYERROR;
 842                         }
 843                         scrub_opts.marker |= SOM_MAXMSS;
 844                         scrub_opts.maxmss = $2;
 845                 }
 846                 | fragcache {
 847                         if (scrub_opts.marker & SOM_FRAGCACHE) {
 848                                 yyerror("fragcache cannot be respecified");
 849                                 YYERROR;
 850                         }
 851                         scrub_opts.marker |= SOM_FRAGCACHE;
 852                         scrub_opts.fragcache = $1;
 853                 }
 854                 | REASSEMBLE STRING {
 855                         if (strcasecmp($2, "tcp") != 0) {
 856                                 free($2);
 857                                 YYERROR;
 858                         }
 859                         free($2);
 860                         if (scrub_opts.reassemble_tcp) {
 861                                 yyerror("reassemble tcp cannot be respecified");
 862                                 YYERROR;
 863                         }
 864                         scrub_opts.reassemble_tcp = 1;
 865                 }
 866                 | RANDOMID {
 867                         if (scrub_opts.randomid) {
 868                                 yyerror("random-id cannot be respecified");
 869                                 YYERROR;
 870                         }
 871                         scrub_opts.randomid = 1;
 872                 }
 873                 ;
 874
 875 fragcache       : FRAGMENT REASSEMBLE   { $$ = 0; /* default */ }
 876                 | FRAGMENT FRAGCROP     { $$ = PFRULE_FRAGCROP; }
 877                 | FRAGMENT FRAGDROP     { $$ = PFRULE_FRAGDROP; }
 878                 ;
 879
 880 antispoof       : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
 881                         struct pf_rule           r;
 882                         struct node_host        *h = NULL;
 883                         struct node_if          *i, *j;
 884
 885                         if (check_rulestate(PFCTL_STATE_FILTER))
 886                                 YYERROR;
 887
 888                         for (i = $3; i; i = i->next) {
 889                                 bzero(&r, sizeof(r));
 890
 891                                 r.action = PF_DROP;
 892                                 r.direction = PF_IN;
 893                                 r.log = $2.log;
 894                                 r.quick = $2.quick;
 895                                 r.af = $4;
 896                                 if (rule_label(&r, $5.label))
 897                                         YYERROR;
 898                                 j = calloc(1, sizeof(struct node_if));
 899                                 if (j == NULL)
 900                                         err(1, "antispoof: calloc");
 901                                 if (strlcpy(j->ifname, i->ifname,
 902                                     sizeof(j->ifname)) >= sizeof(j->ifname)) {
 903                                         free(j);
 904                                         yyerror("interface name too long");
 905                                         YYERROR;
 906                                 }
 907                                 j->not = 1;
 908                                 h = ifa_lookup(j->ifname, PFI_AFLAG_NETWORK);
 909
 910                                 if (h != NULL)
 911                                         expand_rule(&r, j, NULL, NULL, NULL, h,
 912                                             NULL, NULL, NULL, NULL, NULL, NULL);
 913
 914                                 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
 915                                         bzero(&r, sizeof(r));
 916
 917                                         r.action = PF_DROP;
 918                                         r.direction = PF_IN;
 919                                         r.log = $2.log;
 920                                         r.quick = $2.quick;
 921                                         r.af = $4;
 922                                         if (rule_label(&r, $5.label))
 923                                                 YYERROR;
 924                                         h = ifa_lookup(i->ifname, 0);
 925                                         if (h != NULL)
 926                                                 expand_rule(&r, NULL, NULL,
 927                                                     NULL, NULL, h, NULL, NULL,
 928                                                     NULL, NULL, NULL, NULL);
 929                                 }
 930                         }
 931                         free($5.label);
 932                 }
 933                 ;
 934
 935 antispoof_ifspc : FOR if_item                   { $$ = $2; }
 936                 | FOR '{' antispoof_iflst '}'   { $$ = $3; }
 937                 ;
 938
 939 antispoof_iflst : if_item                       { $$ = $1; }
 940                 | antispoof_iflst comma if_item {
 941                         $1->tail->next = $3;
 942                         $1->tail = $3;
 943                         $$ = $1;
 944                 }
 945                 ;
 946
 947 antispoof_opts  :       { bzero(&antispoof_opts, sizeof antispoof_opts); }
 948                     antispoof_opts_l
 949                         { $$ = antispoof_opts; }
 950                 | /* empty */   {
 951                         bzero(&antispoof_opts, sizeof antispoof_opts);
 952                         $$ = antispoof_opts;
 953                 }
 954                 ;
 955
 956 antispoof_opts_l        : antispoof_opts_l antispoof_opt
 957                         | antispoof_opt
 958                         ;
 959
 960 antispoof_opt   : label {
 961                         if (antispoof_opts.label) {
 962                                 yyerror("label cannot be redefined");
 963                                 YYERROR;
 964                         }
 965                         antispoof_opts.label = $1;
 966                 }
 967                 ;
 968
 969 not             : '!'           { $$ = 1; }
 970                 | /* empty */   { $$ = 0; }
 971                 ;
 972
 973 tabledef        : TABLE '<' STRING '>' table_opts {
 974                         struct node_host         *h, *nh;
 975                         struct node_tinit        *ti, *nti;
 976
 977                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
 978                                 yyerror("table name too long, max %d chars",
 979                                     PF_TABLE_NAME_SIZE - 1);
 980                                 free($3);
 981                                 YYERROR;
 982                         }
 983                         if (pf->loadopt & PFCTL_FLAG_TABLE)
 984                                 if (process_tabledef($3, &$5)) {
 985                                         free($3);
 986                                         YYERROR;
 987                                 }
 988                         free($3);
 989                         for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
 990                             ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
 991                                 if (ti->file)
 992                                         free(ti->file);
 993                                 for (h = ti->host; h != NULL; h = nh) {
 994                                         nh = h->next;
 995                                         free(h);
 996                                 }
 997                                 nti = SIMPLEQ_NEXT(ti, entries);
 998                                 free(ti);
 999                         }
1000                 }
1001                 ;
1002
1003 table_opts      :       {
1004                         bzero(&table_opts, sizeof table_opts);
1005                         SIMPLEQ_INIT(&table_opts.init_nodes);
1006                 }
1007                     table_opts_l
1008                         { $$ = table_opts; }
1009                 | /* empty */
1010                         {
1011                         bzero(&table_opts, sizeof table_opts);
1012                         SIMPLEQ_INIT(&table_opts.init_nodes);
1013                         $$ = table_opts;
1014                 }
1015                 ;
1016
1017 table_opts_l    : table_opts_l table_opt
1018                 | table_opt
1019                 ;
1020
1021 table_opt       : STRING                {
1022                         if (!strcmp($1, "const"))
1023                                 table_opts.flags |= PFR_TFLAG_CONST;
1024                         else if (!strcmp($1, "persist"))
1025                                 table_opts.flags |= PFR_TFLAG_PERSIST;
1026                         else {
1027                                 free($1);
1028                                 YYERROR;
1029                         }
1030                         free($1);
1031                 }
1032                 | '{' '}'               { table_opts.init_addr = 1; }
1033                 | '{' host_list '}'     {
1034                         struct node_host        *n;
1035                         struct node_tinit       *ti;
1036
1037                         for (n = $2; n != NULL; n = n->next) {
1038                                 switch (n->addr.type) {
1039                                 case PF_ADDR_ADDRMASK:
1040                                         continue; /* ok */
1041                                 case PF_ADDR_DYNIFTL:
1042                                         yyerror("dynamic addresses are not "
1043                                             "permitted inside tables");
1044                                         break;
1045                                 case PF_ADDR_TABLE:
1046                                         yyerror("tables cannot contain tables");
1047                                         break;
1048                                 case PF_ADDR_NOROUTE:
1049                                         yyerror("\"no-route\" is not permitted "
1050                                             "inside tables");
1051                                         break;
1052                                 default:
1053                                         yyerror("unknown address type %d",
1054                                             n->addr.type);
1055                                 }
1056                                 YYERROR;
1057                         }
1058                         if (!(ti = calloc(1, sizeof(*ti))))
1059                                 err(1, "table_opt: calloc");
1060                         ti->host = $2;
1061                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1062                             entries);
1063                         table_opts.init_addr = 1;
1064                 }
1065                 | FILENAME STRING       {
1066                         struct node_tinit       *ti;
1067
1068                         if (!(ti = calloc(1, sizeof(*ti))))
1069                                 err(1, "table_opt: calloc");
1070                         ti->file = $2;
1071                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1072                             entries);
1073                         table_opts.init_addr = 1;
1074                 }
1075                 ;
1076
1077 pfrule          : action dir logquick interface route af proto fromto
1078                     filter_opts
1079                 {
1080                         struct pf_rule           r;
1081                         struct node_state_opt   *o;
1082                         struct node_proto       *proto;
1083                         int                      srctrack = 0;
1084                         int                      statelock = 0;
1085
1086                         if (check_rulestate(PFCTL_STATE_FILTER))
1087                                 YYERROR;
1088
1089                         memset(&r, 0, sizeof(r));
1090
1091                         r.action = $1.b1;
1092                         switch ($1.b2) {
1093                         case PFRULE_RETURNRST:
1094                                 r.rule_flag |= PFRULE_RETURNRST;
1095                                 r.return_ttl = $1.w;
1096                                 break;
1097                         case PFRULE_RETURNICMP:
1098                                 r.rule_flag |= PFRULE_RETURNICMP;
1099                                 r.return_icmp = $1.w;
1100                                 r.return_icmp6 = $1.w2;
1101                                 break;
1102                         case PFRULE_RETURN:
1103                                 r.rule_flag |= PFRULE_RETURN;
1104                                 r.return_icmp = $1.w;
1105                                 r.return_icmp6 = $1.w2;
1106                                 break;
1107                         }
1108                         r.direction = $2;
1109                         r.log = $3.log;
1110                         r.quick = $3.quick;
1111
1112                         r.af = $6;
1113                         if ($9.tag)
1114                                 if (strlcpy(r.tagname, $9.tag,
1115                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1116                                         yyerror("tag too long, max %u chars",
1117                                             PF_TAG_NAME_SIZE - 1);
1118                                         YYERROR;
1119                                 }
1120                         if ($9.match_tag)
1121                                 if (strlcpy(r.match_tagname, $9.match_tag,
1122                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1123                                         yyerror("tag too long, max %u chars",
1124                                             PF_TAG_NAME_SIZE - 1);
1125                                         YYERROR;
1126                                 }
1127                         r.match_tag_not = $9.match_tag_not;
1128                         r.flags = $9.flags.b1;
1129                         r.flagset = $9.flags.b2;
1130                         if (rule_label(&r, $9.label))
1131                                 YYERROR;
1132                         free($9.label);
1133                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
1134                                 for (proto = $7; proto != NULL &&
1135                                     proto->proto != IPPROTO_TCP;
1136                                     proto = proto->next)
1137                                         ;       /* nothing */
1138                                 if (proto == NULL && $7 != NULL) {
1139                                         if ($9.flags.b1 || $9.flags.b2)
1140                                                 yyerror(
1141                                                     "flags only apply to tcp");
1142                                         if ($8.src_os)
1143                                                 yyerror(
1144                                                     "OS fingerprinting only "
1145                                                     "apply to tcp");
1146                                         YYERROR;
1147                                 }
1148 #if 0
1149                                 if (($9.flags.b1 & parse_flags("S")) == 0 &&
1150                                     $8.src_os) {
1151                                         yyerror("OS fingerprinting requires "
1152                                             "the SYN TCP flag (flags S/SA)");
1153                                         YYERROR;
1154                                 }
1155 #endif
1156                         }
1157
1158                         r.tos = $9.tos;
1159                         r.keep_state = $9.keep.action;
1160                         o = $9.keep.options;
1161                         while (o) {
1162                                 struct node_state_opt   *p = o;
1163
1164                                 switch (o->type) {
1165                                 case PF_STATE_OPT_MAX:
1166                                         if (r.max_states) {
1167                                                 yyerror("state option 'max' "
1168                                                     "multiple definitions");
1169                                                 YYERROR;
1170                                         }
1171                                         r.max_states = o->data.max_states;
1172                                         break;
1173                                 case PF_STATE_OPT_NOSYNC:
1174                                         if (r.rule_flag & PFRULE_NOSYNC) {
1175                                                 yyerror("state option 'sync' "
1176                                                     "multiple definitions");
1177                                                 YYERROR;
1178                                         }
1179                                         r.rule_flag |= PFRULE_NOSYNC;
1180                                         break;
1181                                 case PF_STATE_OPT_SRCTRACK:
1182                                         if (srctrack) {
1183                                                 yyerror("state option "
1184                                                     "'source-track' "
1185                                                     "multiple definitions");
1186                                                 YYERROR;
1187                                         }
1188                                         srctrack =  o->data.src_track;
1189                                         break;
1190                                 case PF_STATE_OPT_MAX_SRC_STATES:
1191                                         if (r.max_src_states) {
1192                                                 yyerror("state option "
1193                                                     "'max-src-states' "
1194                                                     "multiple definitions");
1195                                                 YYERROR;
1196                                         }
1197                                         if (o->data.max_src_nodes == 0) {
1198                                                 yyerror("'max-src-states' must "
1199                                                     "be > 0");
1200                                                 YYERROR;
1201                                         }
1202                                         r.max_src_states =
1203                                             o->data.max_src_states;
1204                                         r.rule_flag |= PFRULE_SRCTRACK;
1205                                         break;
1206                                 case PF_STATE_OPT_MAX_SRC_NODES:
1207                                         if (r.max_src_nodes) {
1208                                                 yyerror("state option "
1209                                                     "'max-src-nodes' "
1210                                                     "multiple definitions");
1211                                                 YYERROR;
1212                                         }
1213                                         if (o->data.max_src_nodes == 0) {
1214                                                 yyerror("'max-src-nodes' must "
1215                                                     "be > 0");
1216                                                 YYERROR;
1217                                         }
1218                                         r.max_src_nodes =
1219                                             o->data.max_src_nodes;
1220                                         r.rule_flag |= PFRULE_SRCTRACK |
1221                                             PFRULE_RULESRCTRACK;
1222                                         break;
1223                                 case PF_STATE_OPT_STATELOCK:
1224                                         if (statelock) {
1225                                                 yyerror("state locking option: "
1226                                                     "multiple definitions");
1227                                                 YYERROR;
1228                                         }
1229                                         statelock = 1;
1230                                         r.rule_flag |= o->data.statelock;
1231                                         break;
1232                                 case PF_STATE_OPT_TIMEOUT:
1233                                         if (r.timeout[o->data.timeout.number]) {
1234                                                 yyerror("state timeout %s "
1235                                                     "multiple definitions",
1236                                                     pf_timeouts[o->data.
1237                                                     timeout.number].name);
1238                                                 YYERROR;
1239                                         }
1240                                         r.timeout[o->data.timeout.number] =
1241                                             o->data.timeout.seconds;
1242                                 }
1243                                 o = o->next;
1244                                 free(p);
1245                         }
1246                         if (srctrack) {
1247                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
1248                                     r.max_src_nodes) {
1249                                         yyerror("'max-src-nodes' is "
1250                                             "incompatible with "
1251                                             "'source-track global'");
1252                                         YYERROR;
1253                                 }
1254                                 r.rule_flag |= PFRULE_SRCTRACK;
1255                                 if (srctrack == PF_SRCTRACK_RULE)
1256                                         r.rule_flag |= PFRULE_RULESRCTRACK;
1257                         }
1258                         if (r.keep_state && !statelock)
1259                                 r.rule_flag |= default_statelock;
1260
1261                         if ($9.fragment)
1262                                 r.rule_flag |= PFRULE_FRAGMENT;
1263                         r.allow_opts = $9.allowopts;
1264
1265                         decide_address_family($8.src.host, &r.af);
1266                         decide_address_family($8.dst.host, &r.af);
1267
1268                         if ($5.rt) {
1269                                 if (!r.direction) {
1270                                         yyerror("direction must be explicit "
1271                                             "with rules that specify routing");
1272                                         YYERROR;
1273                                 }
1274                                 r.rt = $5.rt;
1275                                 r.rpool.opts = $5.pool_opts;
1276                                 if ($5.key != NULL)
1277                                         memcpy(&r.rpool.key, $5.key,
1278                                             sizeof(struct pf_poolhashkey));
1279                         }
1280                         if (r.rt && r.rt != PF_FASTROUTE) {
1281                                 decide_address_family($5.host, &r.af);
1282                                 remove_invalid_hosts(&$5.host, &r.af);
1283                                 if ($5.host == NULL) {
1284                                         yyerror("no routing address with "
1285                                             "matching address family found.");
1286                                         YYERROR;
1287                                 }
1288                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
1289                                     PF_POOL_NONE && ($5.host->next != NULL ||
1290                                     $5.host->addr.type == PF_ADDR_TABLE ||
1291                                     DYNIF_MULTIADDR($5.host->addr)))
1292                                         r.rpool.opts |= PF_POOL_ROUNDROBIN;
1293                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
1294                                     PF_POOL_ROUNDROBIN &&
1295                                     disallow_table($5.host, "tables are only "
1296                                     "supported in round-robin routing pools"))
1297                                         YYERROR;
1298                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
1299                                     PF_POOL_ROUNDROBIN &&
1300                                     disallow_alias($5.host, "interface (%s) "
1301                                     "is only supported in round-robin "
1302                                     "routing pools"))
1303                                         YYERROR;
1304                                 if ($5.host->next != NULL) {
1305                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
1306                                             PF_POOL_ROUNDROBIN) {
1307                                                 yyerror("r.rpool.opts must "
1308                                                     "be PF_POOL_ROUNDROBIN");
1309                                                 YYERROR;
1310                                         }
1311                                 }
1312                         }
1313                         if ($9.queues.qname != NULL) {
1314                                 if (strlcpy(r.qname, $9.queues.qname,
1315                                     sizeof(r.qname)) >= sizeof(r.qname)) {
1316                                         yyerror("rule qname too long (max "
1317                                             "%d chars)", sizeof(r.qname)-1);
1318                                         YYERROR;
1319                                 }
1320                                 free($9.queues.qname);
1321                         }
1322                         if ($9.queues.pqname != NULL) {
1323                                 if (strlcpy(r.pqname, $9.queues.pqname,
1324                                     sizeof(r.pqname)) >= sizeof(r.pqname)) {
1325                                         yyerror("rule pqname too long (max "
1326                                             "%d chars)", sizeof(r.pqname)-1);
1327                                         YYERROR;
1328                                 }
1329                                 free($9.queues.pqname);
1330                         }
1331
1332                         expand_rule(&r, $4, $5.host, $7, $8.src_os,
1333                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
1334                             $9.uid, $9.gid, $9.icmpspec);
1335                 }
1336                 ;
1337
1338 filter_opts     :       { bzero(&filter_opts, sizeof filter_opts); }
1339                     filter_opts_l
1340                         { $$ = filter_opts; }
1341                 | /* empty */   {
1342                         bzero(&filter_opts, sizeof filter_opts);
1343                         $$ = filter_opts;
1344                 }
1345                 ;
1346
1347 filter_opts_l   : filter_opts_l filter_opt
1348                 | filter_opt
1349                 ;
1350
1351 filter_opt      : USER uids {
1352                         if (filter_opts.uid)
1353                                 $2->tail->next = filter_opts.uid;
1354                         filter_opts.uid = $2;
1355                 }
1356                 | GROUP gids {
1357                         if (filter_opts.gid)
1358                                 $2->tail->next = filter_opts.gid;
1359                         filter_opts.gid = $2;
1360                 }
1361                 | flags {
1362                         if (filter_opts.marker & FOM_FLAGS) {
1363                                 yyerror("flags cannot be redefined");
1364                                 YYERROR;
1365                         }
1366                         filter_opts.marker |= FOM_FLAGS;
1367                         filter_opts.flags.b1 |= $1.b1;
1368                         filter_opts.flags.b2 |= $1.b2;
1369                         filter_opts.flags.w |= $1.w;
1370                         filter_opts.flags.w2 |= $1.w2;
1371                 }
1372                 | icmpspec {
1373                         if (filter_opts.marker & FOM_ICMP) {
1374                                 yyerror("icmp-type cannot be redefined");
1375                                 YYERROR;
1376                         }
1377                         filter_opts.marker |= FOM_ICMP;
1378                         filter_opts.icmpspec = $1;
1379                 }
1380                 | tos {
1381                         if (filter_opts.marker & FOM_TOS) {
1382                                 yyerror("tos cannot be redefined");
1383                                 YYERROR;
1384                         }
1385                         filter_opts.marker |= FOM_TOS;
1386                         filter_opts.tos = $1;
1387                 }
1388                 | keep {
1389                         if (filter_opts.marker & FOM_KEEP) {
1390                                 yyerror("modulate or keep cannot be redefined");
1391                                 YYERROR;
1392                         }
1393                         filter_opts.marker |= FOM_KEEP;
1394                         filter_opts.keep.action = $1.action;
1395                         filter_opts.keep.options = $1.options;
1396                 }
1397                 | FRAGMENT {
1398                         filter_opts.fragment = 1;
1399                 }
1400                 | ALLOWOPTS {
1401                         filter_opts.allowopts = 1;
1402                 }
1403                 | label {
1404                         if (filter_opts.label) {
1405                                 yyerror("label cannot be redefined");
1406                                 YYERROR;
1407                         }
1408                         filter_opts.label = $1;
1409                 }
1410                 | TAG string                            {
1411                         filter_opts.tag = $2;
1412                 }
1413                 | not TAGGED string                     {
1414                         filter_opts.match_tag = $3;
1415                         filter_opts.match_tag_not = $1;
1416                 }
1417                 ;
1418
1419 action          : PASS                  { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
1420                 | BLOCK blockspec       { $$ = $2; $$.b1 = PF_DROP; }
1421                 ;
1422
1423 blockspec       : /* empty */           {
1424                         $$.b2 = blockpolicy;
1425                         $$.w = returnicmpdefault;
1426                         $$.w2 = returnicmp6default;
1427                 }
1428                 | DROP                  {
1429                         $$.b2 = PFRULE_DROP;
1430                         $$.w = 0;
1431                         $$.w2 = 0;
1432                 }
1433                 | RETURNRST             {
1434                         $$.b2 = PFRULE_RETURNRST;
1435                         $$.w = 0;
1436                         $$.w2 = 0;
1437                 }
1438                 | RETURNRST '(' TTL number ')'  {
1439                         if ($4 > 255) {
1440                                 yyerror("illegal ttl value %d", $4);
1441                                 YYERROR;
1442                         }
1443                         $$.b2 = PFRULE_RETURNRST;
1444                         $$.w = $4;
1445                         $$.w2 = 0;
1446                 }
1447                 | RETURNICMP            {
1448                         $$.b2 = PFRULE_RETURNICMP;
1449                         $$.w = returnicmpdefault;
1450                         $$.w2 = returnicmp6default;
1451                 }
1452                 | RETURNICMP6           {
1453                         $$.b2 = PFRULE_RETURNICMP;
1454                         $$.w = returnicmpdefault;
1455                         $$.w2 = returnicmp6default;
1456                 }
1457                 | RETURNICMP '(' STRING ')'     {
1458                         $$.b2 = PFRULE_RETURNICMP;
1459                         if (!($$.w = parseicmpspec($3, AF_INET))) {
1460                                 free($3);
1461                                 YYERROR;
1462                         }
1463                         free($3);
1464                         $$.w2 = returnicmp6default;
1465                 }
1466                 | RETURNICMP6 '(' STRING ')'    {
1467                         $$.b2 = PFRULE_RETURNICMP;
1468                         $$.w = returnicmpdefault;
1469                         if (!($$.w2 = parseicmpspec($3, AF_INET6))) {
1470                                 free($3);
1471                                 YYERROR;
1472                         }
1473                         free($3);
1474                 }
1475                 | RETURNICMP '(' STRING comma STRING ')' {
1476                         $$.b2 = PFRULE_RETURNICMP;
1477                         if (!($$.w = parseicmpspec($3, AF_INET)) ||
1478                             !($$.w2 = parseicmpspec($5, AF_INET6))) {
1479                                 free($3);
1480                                 free($5);
1481                                 YYERROR;
1482                         }
1483                         free($3);
1484                         free($5);
1485                 }
1486                 | RETURN {
1487                         $$.b2 = PFRULE_RETURN;
1488                         $$.w = returnicmpdefault;
1489                         $$.w2 = returnicmp6default;
1490                 }
1491                 ;
1492
1493 dir             : /* empty */                   { $$ = 0; }
1494                 | IN                            { $$ = PF_IN; }
1495                 | OUT                           { $$ = PF_OUT; }
1496                 ;
1497
1498 logquick        : /* empty */                   { $$.log = 0; $$.quick = 0; }
1499                 | log                           { $$.log = $1; $$.quick = 0; }
1500                 | QUICK                         { $$.log = 0; $$.quick = 1; }
1501                 | log QUICK                     { $$.log = $1; $$.quick = 1; }
1502                 | QUICK log                     { $$.log = $2; $$.quick = 1; }
1503                 ;
1504
1505 log             : LOG                           { $$ = 1; }
1506                 | LOGALL                        { $$ = 2; }
1507                 ;
1508
1509 interface       : /* empty */                   { $$ = NULL; }
1510                 | ON if_item_not                { $$ = $2; }
1511                 | ON '{' if_list '}'            { $$ = $3; }
1512                 ;
1513
1514 if_list         : if_item_not                   { $$ = $1; }
1515                 | if_list comma if_item_not     {
1516                         $1->tail->next = $3;
1517                         $1->tail = $3;
1518                         $$ = $1;
1519                 }
1520                 ;
1521
1522 if_item_not     : not if_item                   { $$ = $2; $$->not = $1; }
1523                 ;
1524
1525 if_item         : STRING                        {
1526                         struct node_host        *n;
1527
1528                         if ((n = ifa_exists($1, 1)) == NULL) {
1529                                 yyerror("unknown interface %s", $1);
1530                                 free($1);
1531                                 YYERROR;
1532                         }
1533                         $$ = calloc(1, sizeof(struct node_if));
1534                         if ($$ == NULL)
1535                                 err(1, "if_item: calloc");
1536                         if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
1537                             sizeof($$->ifname)) {
1538                                 free($1);
1539                                 free($$);
1540                                 yyerror("interface name too long");
1541                                 YYERROR;
1542                         }
1543                         free($1);
1544                         $$->ifa_flags = n->ifa_flags;
1545                         $$->not = 0;
1546                         $$->next = NULL;
1547                         $$->tail = $$;
1548                 }
1549                 ;
1550
1551 af              : /* empty */                   { $$ = 0; }
1552                 | INET                          { $$ = AF_INET; }
1553                 | INET6                         { $$ = AF_INET6; }
1554                 ;
1555
1556 proto           : /* empty */                   { $$ = NULL; }
1557                 | PROTO proto_item              { $$ = $2; }
1558                 | PROTO '{' proto_list '}'      { $$ = $3; }
1559                 ;
1560
1561 proto_list      : proto_item                    { $$ = $1; }
1562                 | proto_list comma proto_item   {
1563                         $1->tail->next = $3;
1564                         $1->tail = $3;
1565                         $$ = $1;
1566                 }
1567                 ;
1568
1569 proto_item      : STRING                        {
1570                         u_int8_t        pr;
1571                         u_long          ulval;
1572
1573                         if (atoul($1, &ulval) == 0) {
1574                                 if (ulval > 255) {
1575                                         yyerror("protocol outside range");
1576                                         free($1);
1577                                         YYERROR;
1578                                 }
1579                                 pr = (u_int8_t)ulval;
1580                         } else {
1581                                 struct protoent *p;
1582
1583                                 p = getprotobyname($1);
1584                                 if (p == NULL) {
1585                                         yyerror("unknown protocol %s", $1);
1586                                         free($1);
1587                                         YYERROR;
1588                                 }
1589                                 pr = p->p_proto;
1590                         }
1591                         free($1);
1592                         if (pr == 0) {
1593                                 yyerror("proto 0 cannot be used");
1594                                 YYERROR;
1595                         }
1596                         $$ = calloc(1, sizeof(struct node_proto));
1597                         if ($$ == NULL)
1598                                 err(1, "proto_item: calloc");
1599                         $$->proto = pr;
1600                         $$->next = NULL;
1601                         $$->tail = $$;
1602                 }
1603                 ;
1604
1605 fromto          : ALL                           {
1606                         $$.src.host = NULL;
1607                         $$.src.port = NULL;
1608                         $$.dst.host = NULL;
1609                         $$.dst.port = NULL;
1610                         $$.src_os = NULL;
1611                 }
1612                 | from os to                    {
1613                         $$.src = $1;
1614                         $$.src_os = $2;
1615                         $$.dst = $3;
1616                 }
1617                 ;
1618
1619 os              : /* empty */                   { $$ = NULL; }
1620                 | OS xos                        { $$ = $2; }
1621                 | OS '{' os_list '}'            { $$ = $3; }
1622                 ;
1623
1624 xos             : STRING {
1625                         $$ = calloc(1, sizeof(struct node_os));
1626                         if ($$ == NULL)
1627                                 err(1, "os: calloc");
1628                         $$->os = $1;
1629                         $$->tail = $$;
1630                 }
1631                 ;
1632
1633 os_list         : xos                           { $$ = $1; }
1634                 | os_list comma xos             {
1635                         $1->tail->next = $3;
1636                         $1->tail = $3;
1637                         $$ = $1;
1638                 }
1639                 ;
1640
1641 from            : /* empty */                   {
1642                         $$.host = NULL;
1643                         $$.port = NULL;
1644                 }
1645                 | FROM ipportspec               {
1646                         $$ = $2;
1647                 }
1648                 ;
1649
1650 to              : /* empty */                   {
1651                         $$.host = NULL;
1652                         $$.port = NULL;
1653                 }
1654                 | TO ipportspec         {
1655                         $$ = $2;
1656                 }
1657                 ;
1658
1659 ipportspec      : ipspec                        {
1660                         $$.host = $1;
1661                         $$.port = NULL;
1662                 }
1663                 | ipspec PORT portspec          {
1664                         $$.host = $1;
1665                         $$.port = $3;
1666                 }
1667                 | PORT portspec                 {
1668                         $$.host = NULL;
1669                         $$.port = $2;
1670                 }
1671                 ;
1672
1673 ipspec          : ANY                           { $$ = NULL; }
1674                 | xhost                         { $$ = $1; }
1675                 | '{' host_list '}'             { $$ = $2; }
1676                 ;
1677
1678 host_list       : xhost                         { $$ = $1; }
1679                 | host_list comma xhost         {
1680                         if ($3 == NULL)
1681                                 $$ = $1;
1682                         else if ($1 == NULL)
1683                                 $$ = $3;
1684                         else {
1685                                 $1->tail->next = $3;
1686                                 $1->tail = $3->tail;
1687                                 $$ = $1;
1688                         }
1689                 }
1690                 ;
1691
1692 xhost           : not host                      {
1693                         struct node_host        *n;
1694
1695                         for (n = $2; n != NULL; n = n->next)
1696                                 n->not = $1;
1697                         $$ = $2;
1698                 }
1699                 | NOROUTE                       {
1700                         $$ = calloc(1, sizeof(struct node_host));
1701                         if ($$ == NULL)
1702                                 err(1, "xhost: calloc");
1703                         $$->addr.type = PF_ADDR_NOROUTE;
1704                         $$->next = NULL;
1705                         $$->tail = $$;
1706                 }
1707                 ;
1708
1709 host            : STRING                        {
1710                         if (($$ = host($1)) == NULL)    {
1711                                 /* error. "any" is handled elsewhere */
1712                                 free($1);
1713                                 yyerror("could not parse host specification");
1714                                 YYERROR;
1715                         }
1716                         free($1);
1717
1718                 }
1719                 | STRING '/' number             {
1720                         char    *buf;
1721
1722                         if (asprintf(&buf, "%s/%u", $1, $3) == -1)
1723                                 err(1, "host: asprintf");
1724                         free($1);
1725                         if (($$ = host(buf)) == NULL)   {
1726                                 /* error. "any" is handled elsewhere */
1727                                 free(buf);
1728                                 yyerror("could not parse host specification");
1729                                 YYERROR;
1730                         }
1731                         free(buf);
1732                 }
1733                 | dynaddr
1734                 | dynaddr '/' number            {
1735                         struct node_host        *n;
1736
1737                         $$ = $1;
1738                         for (n = $1; n != NULL; n = n->next)
1739                                 set_ipmask(n, $3);
1740                 }
1741                 | '<' STRING '>'        {
1742                         if (strlen($2) >= PF_TABLE_NAME_SIZE) {
1743                                 yyerror("table name '%s' too long", $2);
1744                                 free($2);
1745                                 YYERROR;
1746                         }
1747                         $$ = calloc(1, sizeof(struct node_host));
1748                         if ($$ == NULL)
1749                                 err(1, "host: calloc");
1750                         $$->addr.type = PF_ADDR_TABLE;
1751                         if (strlcpy($$->addr.v.tblname, $2,
1752                             sizeof($$->addr.v.tblname)) >=
1753                             sizeof($$->addr.v.tblname))
1754                                 errx(1, "host: strlcpy");
1755                         free($2);
1756                         $$->next = NULL;
1757                         $$->tail = $$;
1758                 }
1759                 ;
1760
1761 number          : STRING                        {
1762                         u_long  ulval;
1763
1764                         if (atoul($1, &ulval) == -1) {
1765                                 yyerror("%s is not a number", $1);
1766                                 free($1);
1767                                 YYERROR;
1768                         } else
1769                                 $$ = ulval;
1770                         free($1);
1771                 }
1772                 ;
1773
1774 dynaddr         : '(' STRING ')'                {
1775                         int      flags = 0;
1776                         char    *p, *op;
1777
1778                         op = $2;
1779                         while ((p = strrchr($2, ':')) != NULL) {
1780                                 if (!strcmp(p+1, "network"))
1781                                         flags |= PFI_AFLAG_NETWORK;
1782                                 else if (!strcmp(p+1, "broadcast"))
1783                                         flags |= PFI_AFLAG_BROADCAST;
1784                                 else if (!strcmp(p+1, "peer"))
1785                                         flags |= PFI_AFLAG_PEER;
1786                                 else if (!strcmp(p+1, "0"))
1787                                         flags |= PFI_AFLAG_NOALIAS;
1788                                 else {
1789                                         yyerror("interface %s has bad modifier",
1790                                             $2);
1791                                         free(op);
1792                                         YYERROR;
1793                                 }
1794                                 *p = '\0';
1795                         }
1796                         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
1797                                 free(op);
1798                                 yyerror("illegal combination of "
1799                                     "interface modifiers");
1800                                 YYERROR;
1801                         }
1802                         if (ifa_exists($2, 1) == NULL && strcmp($2, "self")) {
1803                                 yyerror("interface %s does not exist", $2);
1804                                 free(op);
1805                                 YYERROR;
1806                         }
1807                         $$ = calloc(1, sizeof(struct node_host));
1808                         if ($$ == NULL)
1809                                 err(1, "address: calloc");
1810                         $$->af = 0;
1811                         set_ipmask($$, 128);
1812                         $$->addr.type = PF_ADDR_DYNIFTL;
1813                         $$->addr.iflags = flags;
1814                         if (strlcpy($$->addr.v.ifname, $2,
1815                             sizeof($$->addr.v.ifname)) >=
1816                             sizeof($$->addr.v.ifname)) {
1817                                 free(op);
1818                                 free($$);
1819                                 yyerror("interface name too long");
1820                                 YYERROR;
1821                         }
1822                         free(op);
1823                         $$->next = NULL;
1824                         $$->tail = $$;
1825                 }
1826                 ;
1827
1828 portspec        : port_item                     { $$ = $1; }
1829                 | '{' port_list '}'             { $$ = $2; }
1830                 ;
1831
1832 port_list       : port_item                     { $$ = $1; }
1833                 | port_list comma port_item     {
1834                         $1->tail->next = $3;
1835                         $1->tail = $3;
1836                         $$ = $1;
1837                 }
1838                 ;
1839
1840 port_item       : port                          {
1841                         $$ = calloc(1, sizeof(struct node_port));
1842                         if ($$ == NULL)
1843                                 err(1, "port_item: calloc");
1844                         $$->port[0] = $1.a;
1845                         $$->port[1] = $1.b;
1846                         if ($1.t)
1847                                 $$->op = PF_OP_RRG;
1848                         else
1849                                 $$->op = PF_OP_EQ;
1850                         $$->next = NULL;
1851                         $$->tail = $$;
1852                 }
1853                 | unaryop port          {
1854                         if ($2.t) {
1855                                 yyerror("':' cannot be used with an other "
1856                                     "port operator");
1857                                 YYERROR;
1858                         }
1859                         $$ = calloc(1, sizeof(struct node_port));
1860                         if ($$ == NULL)
1861                                 err(1, "port_item: calloc");
1862                         $$->port[0] = $2.a;
1863                         $$->port[1] = $2.b;
1864                         $$->op = $1;
1865                         $$->next = NULL;
1866                         $$->tail = $$;
1867                 }
1868                 | port PORTBINARY port          {
1869                         if ($1.t || $3.t) {
1870                                 yyerror("':' cannot be used with an other "
1871                                     "port operator");
1872                                 YYERROR;
1873                         }
1874                         $$ = calloc(1, sizeof(struct node_port));
1875                         if ($$ == NULL)
1876                                 err(1, "port_item: calloc");
1877                         $$->port[0] = $1.a;
1878                         $$->port[1] = $3.a;
1879                         $$->op = $2;
1880                         $$->next = NULL;
1881                         $$->tail = $$;
1882                 }
1883                 ;
1884
1885 port            : STRING                        {
1886                         char    *p = strchr($1, ':');
1887                         struct servent  *s = NULL;
1888                         u_long           ulval;
1889
1890                         if (p == NULL) {
1891                                 if (atoul($1, &ulval) == 0) {
1892                                         if (ulval > 65535) {
1893                                                 free($1);
1894                                                 yyerror("illegal port value %d",
1895                                                     ulval);
1896                                                 YYERROR;
1897                                         }
1898                                         $$.a = htons(ulval);
1899                                 } else {
1900                                         s = getservbyname($1, "tcp");
1901                                         if (s == NULL)
1902                                                 s = getservbyname($1, "udp");
1903                                         if (s == NULL) {
1904                                                 yyerror("unknown port %s", $1);
1905                                                 free($1);
1906                                                 YYERROR;
1907                                         }
1908                                         $$.a = s->s_port;
1909                                 }
1910                                 $$.b = 0;
1911                                 $$.t = 0;
1912                         } else {
1913                                 int port[2];
1914
1915                                 *p++ = 0;
1916                                 if ((port[0] = getservice($1)) == -1 ||
1917                                     (port[1] = getservice(p)) == -1) {
1918                                         free($1);
1919                                         YYERROR;
1920                                 }
1921                                 $$.a = port[0];
1922                                 $$.b = port[1];
1923                                 $$.t = PF_OP_RRG;
1924                         }
1925                         free($1);
1926                 }
1927                 ;
1928
1929 uids            : uid_item                      { $$ = $1; }
1930                 | '{' uid_list '}'              { $$ = $2; }
1931                 ;
1932
1933 uid_list        : uid_item                      { $$ = $1; }
1934                 | uid_list comma uid_item       {
1935                         $1->tail->next = $3;
1936                         $1->tail = $3;
1937                         $$ = $1;
1938                 }
1939                 ;
1940
1941 uid_item        : uid                           {
1942                         $$ = calloc(1, sizeof(struct node_uid));
1943                         if ($$ == NULL)
1944                                 err(1, "uid_item: calloc");
1945                         $$->uid[0] = $1;
1946                         $$->uid[1] = $1;
1947                         $$->op = PF_OP_EQ;
1948                         $$->next = NULL;
1949                         $$->tail = $$;
1950                 }
1951                 | unaryop uid                   {
1952                         if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
1953                                 yyerror("user unknown requires operator = or "
1954                                     "!=");
1955                                 YYERROR;
1956                         }
1957                         $$ = calloc(1, sizeof(struct node_uid));
1958                         if ($$ == NULL)
1959                                 err(1, "uid_item: calloc");
1960                         $$->uid[0] = $2;
1961                         $$->uid[1] = $2;
1962                         $$->op = $1;
1963                         $$->next = NULL;
1964                         $$->tail = $$;
1965                 }
1966                 | uid PORTBINARY uid            {
1967                         if ($1 == UID_MAX || $3 == UID_MAX) {
1968                                 yyerror("user unknown requires operator = or "
1969                                     "!=");
1970                                 YYERROR;
1971                         }
1972                         $$ = calloc(1, sizeof(struct node_uid));
1973                         if ($$ == NULL)
1974                                 err(1, "uid_item: calloc");
1975                         $$->uid[0] = $1;
1976                         $$->uid[1] = $3;
1977                         $$->op = $2;
1978                         $$->next = NULL;
1979                         $$->tail = $$;
1980                 }
1981                 ;
1982
1983 uid             : STRING                        {
1984                         u_long  ulval;
1985
1986                         if (atoul($1, &ulval) == -1) {
1987                                 if (!strcmp($1, "unknown"))
1988                                         $$ = UID_MAX;
1989                                 else {
1990                                         struct passwd   *pw;
1991
1992                                         if ((pw = getpwnam($1)) == NULL) {
1993                                                 yyerror("unknown user %s", $1);
1994                                                 free($1);
1995                                                 YYERROR;
1996                                         }
1997                                         $$ = pw->pw_uid;
1998                                 }
1999                         } else {
2000                                 if (ulval >= UID_MAX) {
2001                                         free($1);
2002                                         yyerror("illegal uid value %lu", ulval);
2003                                         YYERROR;
2004                                 }
2005                                 $$ = ulval;
2006                         }
2007                         free($1);
2008                 }
2009                 ;
2010
2011 gids            : gid_item                      { $$ = $1; }
2012                 | '{' gid_list '}'              { $$ = $2; }
2013                 ;
2014
2015 gid_list        : gid_item                      { $$ = $1; }
2016                 | gid_list comma gid_item       {
2017                         $1->tail->next = $3;
2018                         $1->tail = $3;
2019                         $$ = $1;
2020                 }
2021                 ;
2022
2023 gid_item        : gid                           {
2024                         $$ = calloc(1, sizeof(struct node_gid));
2025                         if ($$ == NULL)
2026                                 err(1, "gid_item: calloc");
2027                         $$->gid[0] = $1;
2028                         $$->gid[1] = $1;
2029                         $$->op = PF_OP_EQ;
2030                         $$->next = NULL;
2031                         $$->tail = $$;
2032                 }
2033                 | unaryop gid                   {
2034                         if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
2035                                 yyerror("group unknown requires operator = or "
2036                                     "!=");
2037                                 YYERROR;
2038                         }
2039                         $$ = calloc(1, sizeof(struct node_gid));
2040                         if ($$ == NULL)
2041                                 err(1, "gid_item: calloc");
2042                         $$->gid[0] = $2;
2043                         $$->gid[1] = $2;
2044                         $$->op = $1;
2045                         $$->next = NULL;
2046                         $$->tail = $$;
2047                 }
2048                 | gid PORTBINARY gid            {
2049                         if ($1 == GID_MAX || $3 == GID_MAX) {
2050                                 yyerror("group unknown requires operator = or "
2051                                     "!=");
2052                                 YYERROR;
2053                         }
2054                         $$ = calloc(1, sizeof(struct node_gid));
2055                         if ($$ == NULL)
2056                                 err(1, "gid_item: calloc");
2057                         $$->gid[0] = $1;
2058                         $$->gid[1] = $3;
2059                         $$->op = $2;
2060                         $$->next = NULL;
2061                         $$->tail = $$;
2062                 }
2063                 ;
2064
2065 gid             : STRING                        {
2066                         u_long  ulval;
2067
2068                         if (atoul($1, &ulval) == -1) {
2069                                 if (!strcmp($1, "unknown"))
2070                                         $$ = GID_MAX;
2071                                 else {
2072                                         struct group    *grp;
2073
2074                                         if ((grp = getgrnam($1)) == NULL) {
2075                                                 yyerror("unknown group %s", $1);
2076                                                 free($1);
2077                                                 YYERROR;
2078                                         }
2079                                         $$ = grp->gr_gid;
2080                                 }
2081                         } else {
2082                                 if (ulval >= GID_MAX) {
2083                                         yyerror("illegal gid value %lu", ulval);
2084                                         free($1);
2085                                         YYERROR;
2086                                 }
2087                                 $$ = ulval;
2088                         }
2089                         free($1);
2090                 }
2091                 ;
2092
2093 flag            : STRING                        {
2094                         int     f;
2095
2096                         if ((f = parse_flags($1)) < 0) {
2097                                 yyerror("bad flags %s", $1);
2098                                 free($1);
2099                                 YYERROR;
2100                         }
2101                         free($1);
2102                         $$.b1 = f;
2103                 }
2104                 ;
2105
2106 flags           : FLAGS flag '/' flag   { $$.b1 = $2.b1; $$.b2 = $4.b1; }
2107                 | FLAGS '/' flag        { $$.b1 = 0; $$.b2 = $3.b1; }
2108                 ;
2109
2110 icmpspec        : ICMPTYPE icmp_item            { $$ = $2; }
2111                 | ICMPTYPE '{' icmp_list '}'    { $$ = $3; }
2112                 | ICMP6TYPE icmp6_item          { $$ = $2; }
2113                 | ICMP6TYPE '{' icmp6_list '}'  { $$ = $3; }
2114                 ;
2115
2116 icmp_list       : icmp_item                     { $$ = $1; }
2117                 | icmp_list comma icmp_item     {
2118                         $1->tail->next = $3;
2119                         $1->tail = $3;
2120                         $$ = $1;
2121                 }
2122                 ;
2123
2124 icmp6_list      : icmp6_item                    { $$ = $1; }
2125                 | icmp6_list comma icmp6_item   {
2126                         $1->tail->next = $3;
2127                         $1->tail = $3;
2128                         $$ = $1;
2129                 }
2130                 ;
2131
2132 icmp_item       : icmptype              {
2133                         $$ = calloc(1, sizeof(struct node_icmp));
2134                         if ($$ == NULL)
2135                                 err(1, "icmp_item: calloc");
2136                         $$->type = $1;
2137                         $$->code = 0;
2138                         $$->proto = IPPROTO_ICMP;
2139                         $$->next = NULL;
2140                         $$->tail = $$;
2141                 }
2142                 | icmptype CODE STRING  {
2143                         const struct icmpcodeent        *p;
2144                         u_long                           ulval;
2145
2146                         if (atoul($3, &ulval) == 0) {
2147                                 if (ulval > 255) {
2148                                         free($3);
2149                                         yyerror("illegal icmp-code %d", ulval);
2150                                         YYERROR;
2151                                 }
2152                         } else {
2153                                 if ((p = geticmpcodebyname($1-1, $3,
2154                                     AF_INET)) == NULL) {
2155                                         yyerror("unknown icmp-code %s", $3);
2156                                         free($3);
2157                                         YYERROR;
2158                                 }
2159                                 ulval = p->code;
2160                         }
2161                         free($3);
2162                         $$ = calloc(1, sizeof(struct node_icmp));
2163                         if ($$ == NULL)
2164                                 err(1, "icmp_item: calloc");
2165                         $$->type = $1;
2166                         $$->code = ulval + 1;
2167                         $$->proto = IPPROTO_ICMP;
2168                         $$->next = NULL;
2169                         $$->tail = $$;
2170                 }
2171                 ;
2172
2173 icmp6_item      : icmp6type             {
2174                         $$ = calloc(1, sizeof(struct node_icmp));
2175                         if ($$ == NULL)
2176                                 err(1, "icmp_item: calloc");
2177                         $$->type = $1;
2178                         $$->code = 0;
2179                         $$->proto = IPPROTO_ICMPV6;
2180                         $$->next = NULL;
2181                         $$->tail = $$;
2182                 }
2183                 | icmp6type CODE STRING {
2184                         const struct icmpcodeent        *p;
2185                         u_long                           ulval;
2186
2187                         if (atoul($3, &ulval) == 0) {
2188                                 if (ulval > 255) {
2189                                         yyerror("illegal icmp6-code %ld",
2190                                             ulval);
2191                                         free($3);
2192                                         YYERROR;
2193                                 }
2194                         } else {
2195                                 if ((p = geticmpcodebyname($1-1, $3,
2196                                     AF_INET6)) == NULL) {
2197                                         yyerror("unknown icmp6-code %s", $3);
2198                                         free($3);
2199                                         YYERROR;
2200                                 }
2201                                 ulval = p->code;
2202                         }
2203                         free($3);
2204                         $$ = calloc(1, sizeof(struct node_icmp));
2205                         if ($$ == NULL)
2206                                 err(1, "icmp_item: calloc");
2207                         $$->type = $1;
2208                         $$->code = ulval + 1;
2209                         $$->proto = IPPROTO_ICMPV6;
2210                         $$->next = NULL;
2211                         $$->tail = $$;
2212                 }
2213                 ;
2214
2215 icmptype        : STRING                        {
2216                         const struct icmptypeent        *p;
2217                         u_long                           ulval;
2218
2219                         if (atoul($1, &ulval) == 0) {
2220                                 if (ulval > 255) {
2221                                         yyerror("illegal icmp-type %d", ulval);
2222                                         free($1);
2223                                         YYERROR;
2224                                 }
2225                                 $$ = ulval + 1;
2226                         } else {
2227                                 if ((p = geticmptypebyname($1, AF_INET)) ==
2228                                     NULL) {
2229                                         yyerror("unknown icmp-type %s", $1);
2230                                         free($1);
2231                                         YYERROR;
2232                                 }
2233                                 $$ = p->type + 1;
2234                         }
2235                         free($1);
2236                 }
2237                 ;
2238
2239 icmp6type       : STRING                        {
2240                         const struct icmptypeent        *p;
2241                         u_long                           ulval;
2242
2243                         if (atoul($1, &ulval) == 0) {
2244                                 if (ulval > 255) {
2245                                         yyerror("illegal icmp6-type %d", ulval);
2246                                         free($1);
2247                                         YYERROR;
2248                                 }
2249                                 $$ = ulval + 1;
2250                         } else {
2251                                 if ((p = geticmptypebyname($1, AF_INET6)) ==
2252                                     NULL) {
2253                                         yyerror("unknown icmp6-type %s", $1);
2254                                         free($1);
2255                                         YYERROR;
2256                                 }
2257                                 $$ = p->type + 1;
2258                         }
2259                         free($1);
2260                 }
2261                 ;
2262
2263 tos             : TOS STRING                    {
2264                         if (!strcmp($2, "lowdelay"))
2265                                 $$ = IPTOS_LOWDELAY;
2266                         else if (!strcmp($2, "throughput"))
2267                                 $$ = IPTOS_THROUGHPUT;
2268                         else if (!strcmp($2, "reliability"))
2269                                 $$ = IPTOS_RELIABILITY;
2270                         else if ($2[0] == '0' && $2[1] == 'x')
2271                                 $$ = strtoul($2, NULL, 16);
2272                         else
2273                                 $$ = strtoul($2, NULL, 10);
2274                         if (!$$ || $$ > 255) {
2275                                 yyerror("illegal tos value %s", $2);
2276                                 free($2);
2277                                 YYERROR;
2278                         }
2279                         free($2);
2280                 }
2281                 ;
2282
2283 sourcetrack     : SOURCETRACK           { $$ = PF_SRCTRACK; }
2284                 | SOURCETRACK GLOBAL    { $$ = PF_SRCTRACK_GLOBAL; }
2285                 | SOURCETRACK RULE      { $$ = PF_SRCTRACK_RULE; }
2286                 ;
2287
2288 statelock       : IFBOUND {
2289                         $$ = PFRULE_IFBOUND;
2290                 }
2291                 | GRBOUND {
2292                         $$ = PFRULE_GRBOUND;
2293                 }
2294                 | FLOATING {
2295                         $$ = 0;
2296                 }
2297                 ;
2298
2299 keep            : KEEP STATE state_opt_spec     {
2300                         $$.action = PF_STATE_NORMAL;
2301                         $$.options = $3;
2302                 }
2303                 | MODULATE STATE state_opt_spec {
2304                         $$.action = PF_STATE_MODULATE;
2305                         $$.options = $3;
2306                 }
2307                 | SYNPROXY STATE state_opt_spec {
2308                         $$.action = PF_STATE_SYNPROXY;
2309                         $$.options = $3;
2310                 }
2311                 ;
2312
2313 state_opt_spec  : '(' state_opt_list ')'        { $$ = $2; }
2314                 | /* empty */                   { $$ = NULL; }
2315                 ;
2316
2317 state_opt_list  : state_opt_item                { $$ = $1; }
2318                 | state_opt_list comma state_opt_item {
2319                         $1->tail->next = $3;
2320                         $1->tail = $3;
2321                         $$ = $1;
2322                 }
2323                 ;
2324
2325 state_opt_item  : MAXIMUM number                {
2326                         $$ = calloc(1, sizeof(struct node_state_opt));
2327                         if ($$ == NULL)
2328                                 err(1, "state_opt_item: calloc");
2329                         $$->type = PF_STATE_OPT_MAX;
2330                         $$->data.max_states = $2;
2331                         $$->next = NULL;
2332                         $$->tail = $$;
2333                 }
2334                 | NOSYNC                                {
2335                         $$ = calloc(1, sizeof(struct node_state_opt));
2336                         if ($$ == NULL)
2337                                 err(1, "state_opt_item: calloc");
2338                         $$->type = PF_STATE_OPT_NOSYNC;
2339                         $$->next = NULL;
2340                         $$->tail = $$;
2341                 }
2342                 | MAXSRCSTATES number                   {
2343                         $$ = calloc(1, sizeof(struct node_state_opt));
2344                         if ($$ == NULL)
2345                                 err(1, "state_opt_item: calloc");
2346                         $$->type = PF_STATE_OPT_MAX_SRC_STATES;
2347                         $$->data.max_src_states = $2;
2348                         $$->next = NULL;
2349                         $$->tail = $$;
2350                 }
2351                 | MAXSRCNODES number                    {
2352                         $$ = calloc(1, sizeof(struct node_state_opt));
2353                         if ($$ == NULL)
2354                                 err(1, "state_opt_item: calloc");
2355                         $$->type = PF_STATE_OPT_MAX_SRC_NODES;
2356                         $$->data.max_src_nodes = $2;
2357                         $$->next = NULL;
2358                         $$->tail = $$;
2359                 }
2360                 | sourcetrack {
2361                         $$ = calloc(1, sizeof(struct node_state_opt));
2362                         if ($$ == NULL)
2363                                 err(1, "state_opt_item: calloc");
2364                         $$->type = PF_STATE_OPT_SRCTRACK;
2365                         $$->data.src_track = $1;
2366                         $$->next = NULL;
2367                         $$->tail = $$;
2368                 }
2369                 | statelock {
2370                         $$ = calloc(1, sizeof(struct node_state_opt));
2371                         if ($$ == NULL)
2372                                 err(1, "state_opt_item: calloc");
2373                         $$->type = PF_STATE_OPT_STATELOCK;
2374                         $$->data.statelock = $1;
2375                         $$->next = NULL;
2376                         $$->tail = $$;
2377                 }
2378                 | STRING number                 {
2379                         int     i;
2380
2381                         for (i = 0; pf_timeouts[i].name &&
2382                             strcmp(pf_timeouts[i].name, $1); ++i)
2383                                 ;       /* nothing */
2384                         if (!pf_timeouts[i].name) {
2385                                 yyerror("illegal timeout name %s", $1);
2386                                 free($1);
2387                                 YYERROR;
2388                         }
2389                         if (strchr(pf_timeouts[i].name, '.') == NULL) {
2390                                 yyerror("illegal state timeout %s", $1);
2391                                 free($1);
2392                                 YYERROR;
2393                         }
2394                         free($1);
2395                         $$ = calloc(1, sizeof(struct node_state_opt));
2396                         if ($$ == NULL)
2397                                 err(1, "state_opt_item: calloc");
2398                         $$->type = PF_STATE_OPT_TIMEOUT;
2399                         $$->data.timeout.number = pf_timeouts[i].timeout;
2400                         $$->data.timeout.seconds = $2;
2401                         $$->next = NULL;
2402                         $$->tail = $$;
2403                 }
2404                 ;
2405
2406 label           : LABEL STRING                  {
2407                         $$ = $2;
2408                 }
2409                 ;
2410
2411 no              : /* empty */                   { $$ = 0; }
2412                 | NO                            { $$ = 1; }
2413                 ;
2414
2415 rport           : STRING                        {
2416                         char    *p = strchr($1, ':');
2417
2418                         if (p == NULL) {
2419                                 if (($$.a = getservice($1)) == -1) {
2420                                         free($1);
2421                                         YYERROR;
2422                                 }
2423                                 $$.b = $$.t = 0;
2424                         } else if (!strcmp(p+1, "*")) {
2425                                 *p = 0;
2426                                 if (($$.a = getservice($1)) == -1) {
2427                                         free($1);
2428                                         YYERROR;
2429                                 }
2430                                 $$.b = 0;
2431                                 $$.t = 1;
2432                         } else {
2433                                 *p++ = 0;
2434                                 if (($$.a = getservice($1)) == -1 ||
2435                                     ($$.b = getservice(p)) == -1) {
2436                                         free($1);
2437                                         YYERROR;
2438                                 }
2439                                 if ($$.a == $$.b)
2440                                         $$.b = 0;
2441                                 $$.t = 0;
2442                         }
2443                         free($1);
2444                 }
2445                 ;
2446
2447 redirspec       : host                          { $$ = $1; }
2448                 | '{' redir_host_list '}'       { $$ = $2; }
2449                 ;
2450
2451 redir_host_list : host                          { $$ = $1; }
2452                 | redir_host_list comma host    {
2453                         $1->tail->next = $3;
2454                         $1->tail = $3->tail;
2455                         $$ = $1;
2456                 }
2457                 ;
2458
2459 redirpool       : /* empty */                   { $$ = NULL; }
2460                 | ARROW redirspec               {
2461                         $$ = calloc(1, sizeof(struct redirection));
2462                         if ($$ == NULL)
2463                                 err(1, "redirection: calloc");
2464                         $$->host = $2;
2465                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
2466                 }
2467                 | ARROW redirspec PORT rport    {
2468                         $$ = calloc(1, sizeof(struct redirection));
2469                         if ($$ == NULL)
2470                                 err(1, "redirection: calloc");
2471                         $$->host = $2;
2472                         $$->rport = $4;
2473                 }
2474                 ;
2475
2476 hashkey         : /* empty */
2477                 {
2478                         $$ = calloc(1, sizeof(struct pf_poolhashkey));
2479                         if ($$ == NULL)
2480                                 err(1, "hashkey: calloc");
2481                         $$->key32[0] = arc4random();
2482                         $$->key32[1] = arc4random();
2483                         $$->key32[2] = arc4random();
2484                         $$->key32[3] = arc4random();
2485                 }
2486                 | string
2487                 {
2488                         if (!strncmp($1, "0x", 2)) {
2489                                 if (strlen($1) != 34) {
2490                                         free($1);
2491                                         yyerror("hex key must be 128 bits "
2492                                                 "(32 hex digits) long");
2493                                         YYERROR;
2494                                 }
2495                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
2496                                 if ($$ == NULL)
2497                                         err(1, "hashkey: calloc");
2498
2499                                 if (sscanf($1, "0x%8x%8x%8x%8x",
2500                                     &$$->key32[0], &$$->key32[1],
2501                                     &$$->key32[2], &$$->key32[3]) != 4) {
2502                                         free($$);
2503                                         free($1);
2504                                         yyerror("invalid hex key");
2505                                         YYERROR;
2506                                 }
2507                         } else {
2508                                 MD5_CTX context;
2509
2510                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
2511                                 if ($$ == NULL)
2512                                         err(1, "hashkey: calloc");
2513                                 MD5Init(&context);
2514                                 MD5Update(&context, (unsigned char *)$1,
2515                                     strlen($1));
2516                                 MD5Final((unsigned char *)$$, &context);
2517                                 $$->key32[0] = htonl($$->key32[0]);
2518                                 $$->key32[1] = htonl($$->key32[1]);
2519                                 $$->key32[2] = htonl($$->key32[2]);
2520                                 $$->key32[3] = htonl($$->key32[3]);
2521                         }
2522                         free($1);
2523                 }
2524                 ;
2525
2526 pool_opts       :       { bzero(&pool_opts, sizeof pool_opts); }
2527                     pool_opts_l
2528                         { $$ = pool_opts; }
2529                 | /* empty */   {
2530                         bzero(&pool_opts, sizeof pool_opts);
2531                         $$ = pool_opts;
2532                 }
2533                 ;
2534
2535 pool_opts_l     : pool_opts_l pool_opt
2536                 | pool_opt
2537                 ;
2538
2539 pool_opt        : BITMASK       {
2540                         if (pool_opts.type) {
2541                                 yyerror("pool type cannot be redefined");
2542                                 YYERROR;
2543                         }
2544                         pool_opts.type =  PF_POOL_BITMASK;
2545                 }
2546                 | RANDOM        {
2547                         if (pool_opts.type) {
2548                                 yyerror("pool type cannot be redefined");
2549                                 YYERROR;
2550                         }
2551                         pool_opts.type = PF_POOL_RANDOM;
2552                 }
2553                 | SOURCEHASH hashkey {
2554                         if (pool_opts.type) {
2555                                 yyerror("pool type cannot be redefined");
2556                                 YYERROR;
2557                         }
2558                         pool_opts.type = PF_POOL_SRCHASH;
2559                         pool_opts.key = $2;
2560                 }
2561                 | ROUNDROBIN    {
2562                         if (pool_opts.type) {
2563                                 yyerror("pool type cannot be redefined");
2564                                 YYERROR;
2565                         }
2566                         pool_opts.type = PF_POOL_ROUNDROBIN;
2567                 }
2568                 | STATICPORT    {
2569                         if (pool_opts.staticport) {
2570                                 yyerror("static-port cannot be redefined");
2571                                 YYERROR;
2572                         }
2573                         pool_opts.staticport = 1;
2574                 }
2575                 | STICKYADDRESS {
2576                         if (filter_opts.marker & POM_STICKYADDRESS) {
2577                                 yyerror("sticky-address cannot be redefined");
2578                                 YYERROR;
2579                         }
2580                         pool_opts.marker |= POM_STICKYADDRESS;
2581                         pool_opts.opts |= PF_POOL_STICKYADDR;
2582                 }
2583                 ;
2584
2585 redirection     : /* empty */                   { $$ = NULL; }
2586                 | ARROW host                    {
2587                         $$ = calloc(1, sizeof(struct redirection));
2588                         if ($$ == NULL)
2589                                 err(1, "redirection: calloc");
2590                         $$->host = $2;
2591                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
2592                 }
2593                 | ARROW host PORT rport {
2594                         $$ = calloc(1, sizeof(struct redirection));
2595                         if ($$ == NULL)
2596                                 err(1, "redirection: calloc");
2597                         $$->host = $2;
2598                         $$->rport = $4;
2599                 }
2600                 ;
2601
2602 natpass         : /* empty */   { $$ = 0; }
2603                 | PASS          { $$ = 1; }
2604                 ;
2605
2606 nataction       : no NAT natpass {
2607                         $$.b2 = $$.w = 0;
2608                         if ($1)
2609                                 $$.b1 = PF_NONAT;
2610                         else
2611                                 $$.b1 = PF_NAT;
2612                         $$.b2 = $3;
2613                 }
2614                 | no RDR natpass {
2615                         $$.b2 = $$.w = 0;
2616                         if ($1)
2617                                 $$.b1 = PF_NORDR;
2618                         else
2619                                 $$.b1 = PF_RDR;
2620                         $$.b2 = $3;
2621                 }
2622                 ;
2623
2624 natrule         : nataction interface af proto fromto tag redirpool pool_opts
2625                 {
2626                         struct pf_rule  r;
2627
2628                         if (check_rulestate(PFCTL_STATE_NAT))
2629                                 YYERROR;
2630
2631                         memset(&r, 0, sizeof(r));
2632
2633                         r.action = $1.b1;
2634                         r.natpass = $1.b2;
2635                         r.af = $3;
2636
2637                         if (!r.af) {
2638                                 if ($5.src.host && $5.src.host->af &&
2639                                     !$5.src.host->ifindex)
2640                                         r.af = $5.src.host->af;
2641                                 else if ($5.dst.host && $5.dst.host->af &&
2642                                     !$5.dst.host->ifindex)
2643                                         r.af = $5.dst.host->af;
2644                         }
2645
2646                         if ($6 != NULL)
2647                                 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
2648                                     PF_TAG_NAME_SIZE) {
2649                                         yyerror("tag too long, max %u chars",
2650                                             PF_TAG_NAME_SIZE - 1);
2651                                         YYERROR;
2652                                 }
2653
2654                         if (r.action == PF_NONAT || r.action == PF_NORDR) {
2655                                 if ($7 != NULL) {
2656                                         yyerror("translation rule with 'no' "
2657                                             "does not need '->'");
2658                                         YYERROR;
2659                                 }
2660                         } else {
2661                                 if ($7 == NULL || $7->host == NULL) {
2662                                         yyerror("translation rule requires '-> "
2663                                             "address'");
2664                                         YYERROR;
2665                                 }
2666                                 if (!r.af && ! $7->host->ifindex)
2667                                         r.af = $7->host->af;
2668
2669                                 remove_invalid_hosts(&$7->host, &r.af);
2670                                 if (invalid_redirect($7->host, r.af))
2671                                         YYERROR;
2672                                 if (check_netmask($7->host, r.af))
2673                                         YYERROR;
2674
2675                                 r.rpool.proxy_port[0] = ntohs($7->rport.a);
2676
2677                                 switch (r.action) {
2678                                 case PF_RDR:
2679                                         if (!$7->rport.b && $7->rport.t &&
2680                                             $5.dst.port != NULL) {
2681                                                 r.rpool.proxy_port[1] =
2682                                                     ntohs($7->rport.a) +
2683                                                     (ntohs(
2684                                                     $5.dst.port->port[1]) -
2685                                                     ntohs(
2686                                                     $5.dst.port->port[0]));
2687                                         } else
2688                                                 r.rpool.proxy_port[1] =
2689                                                     ntohs($7->rport.b);
2690                                         break;
2691                                 case PF_NAT:
2692                                         r.rpool.proxy_port[1] =
2693                                             ntohs($7->rport.b);
2694                                         if (!r.rpool.proxy_port[0] &&
2695                                             !r.rpool.proxy_port[1]) {
2696                                                 r.rpool.proxy_port[0] =
2697                                                     PF_NAT_PROXY_PORT_LOW;
2698                                                 r.rpool.proxy_port[1] =
2699                                                     PF_NAT_PROXY_PORT_HIGH;
2700                                         } else if (!r.rpool.proxy_port[1])
2701                                                 r.rpool.proxy_port[1] =
2702                                                     r.rpool.proxy_port[0];
2703                                         break;
2704                                 default:
2705                                         break;
2706                                 }
2707
2708                                 r.rpool.opts = $8.type;
2709                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2710                                     PF_POOL_NONE && ($7->host->next != NULL ||
2711                                     $7->host->addr.type == PF_ADDR_TABLE ||
2712                                     DYNIF_MULTIADDR($7->host->addr)))
2713                                         r.rpool.opts = PF_POOL_ROUNDROBIN;
2714                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2715                                     PF_POOL_ROUNDROBIN &&
2716                                     disallow_table($7->host, "tables are only "
2717                                     "supported in round-robin redirection "
2718                                     "pools"))
2719                                         YYERROR;
2720                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2721                                     PF_POOL_ROUNDROBIN &&
2722                                     disallow_alias($7->host, "interface (%s) "
2723                                     "is only supported in round-robin "
2724                                     "redirection pools"))
2725                                         YYERROR;
2726                                 if ($7->host->next != NULL) {
2727                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2728                                             PF_POOL_ROUNDROBIN) {
2729                                                 yyerror("only round-robin "
2730                                                     "valid for multiple "
2731                                                     "redirection addresses");
2732                                                 YYERROR;
2733                                         }
2734                                 }
2735                         }
2736
2737                         if ($8.key != NULL)
2738                                 memcpy(&r.rpool.key, $8.key,
2739                                     sizeof(struct pf_poolhashkey));
2740
2741                          if ($8.opts)
2742                                 r.rpool.opts |= $8.opts;
2743
2744                         if ($8.staticport) {
2745                                 if (r.action != PF_NAT) {
2746                                         yyerror("the 'static-port' option is "
2747                                             "only valid with nat rules");
2748                                         YYERROR;
2749                                 }
2750                                 if (r.rpool.proxy_port[0] !=
2751                                     PF_NAT_PROXY_PORT_LOW &&
2752                                     r.rpool.proxy_port[1] !=
2753                                     PF_NAT_PROXY_PORT_HIGH) {
2754                                         yyerror("the 'static-port' option can't"
2755                                             " be used when specifying a port"
2756                                             " range");
2757                                         YYERROR;
2758                                 }
2759                                 r.rpool.proxy_port[0] = 0;
2760                                 r.rpool.proxy_port[1] = 0;
2761                         }
2762
2763                         expand_rule(&r, $2, $7 == NULL ? NULL : $7->host, $4,
2764                             $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
2765                             $5.dst.port, 0, 0, 0);
2766                         free($7);
2767                 }
2768                 ;
2769
2770 binatrule       : no BINAT natpass interface af proto FROM host TO ipspec tag
2771                     redirection
2772                 {
2773                         struct pf_rule          binat;
2774                         struct pf_pooladdr      *pa;
2775
2776                         if (check_rulestate(PFCTL_STATE_NAT))
2777                                 YYERROR;
2778
2779                         memset(&binat, 0, sizeof(binat));
2780
2781                         if ($1)
2782                                 binat.action = PF_NOBINAT;
2783                         else
2784                                 binat.action = PF_BINAT;
2785                         binat.natpass = $3;
2786                         binat.af = $5;
2787                         if (!binat.af && $8 != NULL && $8->af)
2788                                 binat.af = $8->af;
2789                         if (!binat.af && $10 != NULL && $10->af)
2790                                 binat.af = $10->af;
2791                         if (!binat.af && $12 != NULL && $12->host)
2792                                 binat.af = $12->host->af;
2793                         if (!binat.af) {
2794                                 yyerror("address family (inet/inet6) "
2795                                     "undefined");
2796                                 YYERROR;
2797                         }
2798
2799                         if ($4 != NULL) {
2800                                 memcpy(binat.ifname, $4->ifname,
2801                                     sizeof(binat.ifname));
2802                                 binat.ifnot = $4->not;
2803                                 free($4);
2804                         }
2805                         if ($11 != NULL)
2806                                 if (strlcpy(binat.tagname, $11,
2807                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2808                                         yyerror("tag too long, max %u chars",
2809                                             PF_TAG_NAME_SIZE - 1);
2810                                         YYERROR;
2811                                 }
2812
2813                         if ($6 != NULL) {
2814                                 binat.proto = $6->proto;
2815                                 free($6);
2816                         }
2817
2818                         if ($8 != NULL && disallow_table($8, "invalid use of "
2819                             "table <%s> as the source address of a binat rule"))
2820                                 YYERROR;
2821                         if ($8 != NULL && disallow_alias($8, "invalid use of "
2822                             "interface (%s) as the source address of a binat "
2823                             "rule"))
2824                                 YYERROR;
2825                         if ($12 != NULL && $12->host != NULL && disallow_table(
2826                             $12->host, "invalid use of table <%s> as the "
2827                             "redirect address of a binat rule"))
2828                                 YYERROR;
2829                         if ($12 != NULL && $12->host != NULL && disallow_alias(
2830                             $12->host, "invalid use of interface (%s) as the "
2831                             "redirect address of a binat rule"))
2832                                 YYERROR;
2833
2834                         if ($8 != NULL) {
2835                                 if ($8->next) {
2836                                         yyerror("multiple binat ip addresses");
2837                                         YYERROR;
2838                                 }
2839                                 if ($8->addr.type == PF_ADDR_DYNIFTL)
2840                                         $8->af = binat.af;
2841                                 if ($8->af != binat.af) {
2842                                         yyerror("binat ip versions must match");
2843                                         YYERROR;
2844                                 }
2845                                 if (check_netmask($8, binat.af))
2846                                         YYERROR;
2847                                 memcpy(&binat.src.addr, &$8->addr,
2848                                     sizeof(binat.src.addr));
2849                                 free($8);
2850                         }
2851                         if ($10 != NULL) {
2852                                 if ($10->next) {
2853                                         yyerror("multiple binat ip addresses");
2854                                         YYERROR;
2855                                 }
2856                                 if ($10->af != binat.af && $10->af) {
2857                                         yyerror("binat ip versions must match");
2858                                         YYERROR;
2859                                 }
2860                                 if (check_netmask($10, binat.af))
2861                                         YYERROR;
2862                                 memcpy(&binat.dst.addr, &$10->addr,
2863                                     sizeof(binat.dst.addr));
2864                                 binat.dst.not = $10->not;
2865                                 free($10);
2866                         }
2867
2868                         if (binat.action == PF_NOBINAT) {
2869                                 if ($12 != NULL) {
2870                                         yyerror("'no binat' rule does not need"
2871                                             " '->'");
2872                                         YYERROR;
2873                                 }
2874                         } else {
2875                                 if ($12 == NULL || $12->host == NULL) {
2876                                         yyerror("'binat' rule requires"
2877                                             " '-> address'");
2878                                         YYERROR;
2879                                 }
2880
2881                                 remove_invalid_hosts(&$12->host, &binat.af);
2882                                 if (invalid_redirect($12->host, binat.af))
2883                                         YYERROR;
2884                                 if ($12->host->next != NULL) {
2885                                         yyerror("binat rule must redirect to "
2886                                             "a single address");
2887                                         YYERROR;
2888                                 }
2889                                 if (check_netmask($12->host, binat.af))
2890                                         YYERROR;
2891
2892                                 if (!PF_AZERO(&binat.src.addr.v.a.mask,
2893                                     binat.af) &&
2894                                     !PF_AEQ(&binat.src.addr.v.a.mask,
2895                                     &$12->host->addr.v.a.mask, binat.af)) {
2896                                         yyerror("'binat' source mask and "
2897                                             "redirect mask must be the same");
2898                                         YYERROR;
2899                                 }
2900
2901                                 TAILQ_INIT(&binat.rpool.list);
2902                                 pa = calloc(1, sizeof(struct pf_pooladdr));
2903                                 if (pa == NULL)
2904                                         err(1, "binat: calloc");
2905                                 pa->addr = $12->host->addr;
2906                                 pa->ifname[0] = 0;
2907                                 TAILQ_INSERT_TAIL(&binat.rpool.list,
2908                                     pa, entries);
2909
2910                                 free($12);
2911                         }
2912
2913                         pfctl_add_rule(pf, &binat);
2914                 }
2915                 ;
2916
2917 tag             : /* empty */           { $$ = NULL; }
2918                 | TAG STRING            { $$ = $2; }
2919                 ;
2920
2921 route_host      : STRING                        {
2922                         $$ = calloc(1, sizeof(struct node_host));
2923                         if ($$ == NULL)
2924                                 err(1, "route_host: calloc");
2925                         $$->ifname = $1;
2926                         if (ifa_exists($$->ifname, 0) == NULL) {
2927                                 yyerror("routeto: unknown interface %s",
2928                                     $$->ifname);
2929                                 free($1);
2930                                 free($$);
2931                                 YYERROR;
2932                         }
2933                         set_ipmask($$, 128);
2934                         $$->next = NULL;
2935                         $$->tail = $$;
2936                 }
2937                 | '(' STRING host ')'           {
2938                         $$ = $3;
2939                         $$->ifname = $2;
2940                         if (ifa_exists($$->ifname, 0) == NULL) {
2941                                 yyerror("routeto: unknown interface %s",
2942                                     $$->ifname);
2943                                 YYERROR;
2944                         }
2945                 }
2946                 ;
2947
2948 route_host_list : route_host                            { $$ = $1; }
2949                 | route_host_list comma route_host      {
2950                         if ($1->af == 0)
2951                                 $1->af = $3->af;
2952                         if ($1->af != $3->af) {
2953                                 yyerror("all pool addresses must be in the "
2954                                     "same address family");
2955                                 YYERROR;
2956                         }
2957                         $1->tail->next = $3;
2958                         $1->tail = $3->tail;
2959                         $$ = $1;
2960                 }
2961                 ;
2962
2963 routespec       : route_host                    { $$ = $1; }
2964                 | '{' route_host_list '}'       { $$ = $2; }
2965                 ;
2966
2967 route           : /* empty */                   {
2968                         $$.host = NULL;
2969                         $$.rt = 0;
2970                         $$.pool_opts = 0;
2971                 }
2972                 | FASTROUTE {
2973                         $$.host = NULL;
2974                         $$.rt = PF_FASTROUTE;
2975                         $$.pool_opts = 0;
2976                 }
2977                 | ROUTETO routespec pool_opts {
2978                         $$.host = $2;
2979                         $$.rt = PF_ROUTETO;
2980                         $$.pool_opts = $3.type | $3.opts;
2981                         if ($3.key != NULL)
2982                                 $$.key = $3.key;
2983                 }
2984                 | REPLYTO routespec pool_opts {
2985                         $$.host = $2;
2986                         $$.rt = PF_REPLYTO;
2987                         $$.pool_opts = $3.type | $3.opts;
2988                         if ($3.key != NULL)
2989                                 $$.key = $3.key;
2990                 }
2991                 | DUPTO routespec pool_opts {
2992                         $$.host = $2;
2993                         $$.rt = PF_DUPTO;
2994                         $$.pool_opts = $3.type | $3.opts;
2995                         if ($3.key != NULL)
2996                                 $$.key = $3.key;
2997                 }
2998                 ;
2999
3000 timeout_spec    : STRING number
3001                 {
3002                         if (check_rulestate(PFCTL_STATE_OPTION)) {
3003                                 free($1);
3004                                 YYERROR;
3005                         }
3006                         if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
3007                                 yyerror("unknown timeout %s", $1);
3008                                 free($1);
3009                                 YYERROR;
3010                         }
3011                         free($1);
3012                 }
3013                 ;
3014
3015 timeout_list    : timeout_list comma timeout_spec
3016                 | timeout_spec
3017                 ;
3018
3019 limit_spec      : STRING number
3020                 {
3021                         if (check_rulestate(PFCTL_STATE_OPTION)) {
3022                                 free($1);
3023                                 YYERROR;
3024                         }
3025                         if (pfctl_set_limit(pf, $1, $2) != 0) {
3026                                 yyerror("unable to set limit %s %u", $1, $2);
3027                                 free($1);
3028                                 YYERROR;
3029                         }
3030                         free($1);
3031                 }
3032                 ;
3033
3034 limit_list      : limit_list comma limit_spec
3035                 | limit_spec
3036                 ;
3037
3038 comma           : ','
3039                 | /* empty */
3040                 ;
3041
3042 yesno           : NO                    { $$ = 0; }
3043                 | STRING                {
3044                         if (!strcmp($1, "yes"))
3045                                 $$ = 1;
3046                         else {
3047                                 free($1);
3048                                 YYERROR;
3049                         }
3050                         free($1);
3051                 }
3052                 ;
3053
3054 unaryop         : '='           { $$ = PF_OP_EQ; }
3055                 | '!' '='       { $$ = PF_OP_NE; }
3056                 | '<' '='       { $$ = PF_OP_LE; }
3057                 | '<'           { $$ = PF_OP_LT; }
3058                 | '>' '='       { $$ = PF_OP_GE; }
3059                 | '>'           { $$ = PF_OP_GT; }
3060                 ;
3061
3062 %%
3063
3064 int
3065 yyerror(const char *fmt, ...)
3066 {
3067         va_list          ap;
3068
3069         errors = 1;
3070         va_start(ap, fmt);
3071         fprintf(stderr, "%s:%d: ", infile, yylval.lineno);
3072         vfprintf(stderr, fmt, ap);
3073         fprintf(stderr, "\n");
3074         va_end(ap);
3075         return (0);
3076 }
3077
3078 int
3079 disallow_table(struct node_host *h, const char *fmt)
3080 {
3081         for (; h != NULL; h = h->next)
3082                 if (h->addr.type == PF_ADDR_TABLE) {
3083                         yyerror(fmt, h->addr.v.tblname);
3084                         return (1);
3085                 }
3086         return (0);
3087 }
3088
3089 int
3090 disallow_alias(struct node_host *h, const char *fmt)
3091 {
3092         for (; h != NULL; h = h->next)
3093                 if (DYNIF_MULTIADDR(h->addr)) {
3094                         yyerror(fmt, h->addr.v.tblname);
3095                         return (1);
3096                 }
3097         return (0);
3098 }
3099
3100 int
3101 rule_consistent(struct pf_rule *r)
3102 {
3103         int     problems = 0;
3104
3105         switch (r->action) {
3106         case PF_PASS:
3107         case PF_DROP:
3108         case PF_SCRUB:
3109                 problems = filter_consistent(r);
3110                 break;
3111         case PF_NAT:
3112         case PF_NONAT:
3113                 problems = nat_consistent(r);
3114                 break;
3115         case PF_RDR:
3116         case PF_NORDR:
3117                 problems = rdr_consistent(r);
3118                 break;
3119         case PF_BINAT:
3120         case PF_NOBINAT:
3121         default:
3122                 break;
3123         }
3124         return (problems);
3125 }
3126
3127 int
3128 filter_consistent(struct pf_rule *r)
3129 {
3130         int     problems = 0;
3131
3132         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
3133             (r->src.port_op || r->dst.port_op)) {
3134                 yyerror("port only applies to tcp/udp");
3135                 problems++;
3136         }
3137         if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
3138             (r->type || r->code)) {
3139                 yyerror("icmp-type/code only applies to icmp");
3140                 problems++;
3141         }
3142         if (!r->af && (r->type || r->code)) {
3143                 yyerror("must indicate address family with icmp-type/code");
3144                 problems++;
3145         }
3146         if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
3147             (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
3148                 yyerror("proto %s doesn't match address family %s",
3149                     r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
3150                     r->af == AF_INET ? "inet" : "inet6");
3151                 problems++;
3152         }
3153         if (r->allow_opts && r->action != PF_PASS) {
3154                 yyerror("allow-opts can only be specified for pass rules");
3155                 problems++;
3156         }
3157         if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
3158             r->dst.port_op || r->flagset || r->type || r->code)) {
3159                 yyerror("fragments can be filtered only on IP header fields");
3160                 problems++;
3161         }
3162         if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
3163                 yyerror("return-rst can only be applied to TCP rules");
3164                 problems++;
3165         }
3166         if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
3167                 yyerror("max-src-nodes requires 'source-track rule'");
3168                 problems++;
3169         }
3170         if (r->action == PF_DROP && r->keep_state) {
3171                 yyerror("keep state on block rules doesn't make sense");
3172                 problems++;
3173         }
3174         if ((r->tagname[0] || r->match_tagname[0]) && !r->keep_state &&
3175             r->action == PF_PASS && !r->anchorname[0]) {
3176                 yyerror("tags cannot be used without keep state");
3177                 problems++;
3178         }
3179         return (-problems);
3180 }
3181
3182 int
3183 nat_consistent(struct pf_rule *r __unused)
3184 {
3185         return (0);     /* yeah! */
3186 }
3187
3188 int
3189 rdr_consistent(struct pf_rule *r)
3190 {
3191         int                      problems = 0;
3192
3193         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
3194                 if (r->src.port_op) {
3195                         yyerror("src port only applies to tcp/udp");
3196                         problems++;
3197                 }
3198                 if (r->dst.port_op) {
3199                         yyerror("dst port only applies to tcp/udp");
3200                         problems++;
3201                 }
3202                 if (r->rpool.proxy_port[0]) {
3203                         yyerror("rpool port only applies to tcp/udp");
3204                         problems++;
3205                 }
3206         }
3207         if (r->dst.port_op &&
3208             r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
3209                 yyerror("invalid port operator for rdr destination port");
3210                 problems++;
3211         }
3212         return (-problems);
3213 }
3214
3215 int
3216 process_tabledef(char *name, struct table_opts *opts)
3217 {
3218         struct pfr_buffer        ab;
3219         struct node_tinit       *ti;
3220
3221         bzero(&ab, sizeof(ab));
3222         ab.pfrb_type = PFRB_ADDRS;
3223         SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
3224                 if (ti->file)
3225                         if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
3226                                 if (errno)
3227                                         yyerror("cannot load \"%s\": %s",
3228                                             ti->file, strerror(errno));
3229                                 else
3230                                         yyerror("file \"%s\" contains bad data",
3231                                             ti->file);
3232                                 goto _error;
3233                         }
3234                 if (ti->host)
3235                         if (append_addr_host(&ab, ti->host, 0, 0)) {
3236                                 yyerror("cannot create address buffer: %s",
3237                                     strerror(errno));
3238                                 goto _error;
3239                         }
3240         }
3241         if (pf->opts & PF_OPT_VERBOSE)
3242                 print_tabledef(name, opts->flags, opts->init_addr,
3243                     &opts->init_nodes);
3244         if (!(pf->opts & PF_OPT_NOACTION) &&
3245             pfctl_define_table(name, opts->flags, opts->init_addr,
3246             pf->anchor, pf->ruleset, &ab, pf->tticket)) {
3247                 yyerror("cannot define table %s: %s", name,
3248                     pfr_strerror(errno));
3249                 goto _error;
3250         }
3251         pf->tdirty = 1;
3252         pfr_buf_clear(&ab);
3253         return (0);
3254 _error:
3255         pfr_buf_clear(&ab);
3256         return (-1);
3257 }
3258
3259 struct keywords {
3260         const char      *k_name;
3261         int              k_val;
3262 };
3263
3264 /* macro gore, but you should've seen the prior indentation nightmare... */
3265
3266 #define FREE_LIST(T,r) \
3267         do { \
3268                 T *p, *node = r; \
3269                 while (node != NULL) { \
3270                         p = node; \
3271                         node = node->next; \
3272                         free(p); \
3273                 } \
3274         } while (0)
3275
3276 #define LOOP_THROUGH(T,n,r,C) \
3277         do { \
3278                 T *n; \
3279                 if (r == NULL) { \
3280                         r = calloc(1, sizeof(T)); \
3281                         if (r == NULL) \
3282                                 err(1, "LOOP: calloc"); \
3283                         r->next = NULL; \
3284                 } \
3285                 n = r; \
3286                 while (n != NULL) { \
3287                         do { \
3288                                 C; \
3289                         } while (0); \
3290                         n = n->next; \
3291                 } \
3292         } while (0)
3293
3294 void
3295 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
3296 {
3297         char *tmp;
3298         char *p, *q;
3299
3300         if ((tmp = calloc(1, len)) == NULL)
3301                 err(1, "expand_label_str: calloc");
3302         p = q = label;
3303         while ((q = strstr(p, srch)) != NULL) {
3304                 *q = '\0';
3305                 if ((strlcat(tmp, p, len) >= len) ||
3306                     (strlcat(tmp, repl, len) >= len))
3307                         errx(1, "expand_label: label too long");
3308                 q += strlen(srch);
3309                 p = q;
3310         }
3311         if (strlcat(tmp, p, len) >= len)
3312                 errx(1, "expand_label: label too long");
3313         strlcpy(label, tmp, len);       /* always fits */
3314         free(tmp);
3315 }
3316
3317 void
3318 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
3319 {
3320         if (strstr(label, name) != NULL) {
3321                 if (!*ifname)
3322                         expand_label_str(label, len, name, "any");
3323                 else
3324                         expand_label_str(label, len, name, ifname);
3325         }
3326 }
3327
3328 void
3329 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
3330     struct node_host *h)
3331 {
3332         char tmp[64], tmp_not[66];
3333
3334         if (strstr(label, name) != NULL) {
3335                 switch (h->addr.type) {
3336                 case PF_ADDR_DYNIFTL:
3337                         snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
3338                         break;
3339                 case PF_ADDR_TABLE:
3340                         snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
3341                         break;
3342                 case PF_ADDR_NOROUTE:
3343                         snprintf(tmp, sizeof(tmp), "no-route");
3344                         break;
3345                 case PF_ADDR_ADDRMASK:
3346                         if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
3347                             PF_AZERO(&h->addr.v.a.mask, af)))
3348                                 snprintf(tmp, sizeof(tmp), "any");
3349                         else {
3350                                 char    a[48];
3351                                 int     bits;
3352
3353                                 if (inet_ntop(af, &h->addr.v.a.addr, a,
3354                                     sizeof(a)) == NULL)
3355                                         snprintf(tmp, sizeof(tmp), "?");
3356                                 else {
3357                                         bits = unmask(&h->addr.v.a.mask, af);
3358                                         if ((af == AF_INET && bits < 32) ||
3359                                             (af == AF_INET6 && bits < 128))
3360                                                 snprintf(tmp, sizeof(tmp),
3361                                                     "%s/%d", a, bits);
3362                                         else
3363                                                 snprintf(tmp, sizeof(tmp),
3364                                                     "%s", a);
3365                                 }
3366                         }
3367                         break;
3368                 default:
3369                         snprintf(tmp, sizeof(tmp), "?");
3370                         break;
3371                 }
3372
3373                 if (h->not) {
3374                         snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
3375                         expand_label_str(label, len, name, tmp_not);
3376                 } else
3377                         expand_label_str(label, len, name, tmp);
3378         }
3379 }
3380
3381 void
3382 expand_label_port(const char *name, char *label, size_t len,
3383     struct node_port *port)
3384 {
3385         char     a1[6], a2[6], op[13] = "";
3386
3387         if (strstr(label, name) != NULL) {
3388                 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
3389                 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
3390                 if (!port->op)
3391                         ;
3392                 else if (port->op == PF_OP_IRG)
3393                         snprintf(op, sizeof(op), "%s><%s", a1, a2);
3394                 else if (port->op == PF_OP_XRG)
3395                         snprintf(op, sizeof(op), "%s<>%s", a1, a2);
3396                 else if (port->op == PF_OP_EQ)
3397                         snprintf(op, sizeof(op), "%s", a1);
3398                 else if (port->op == PF_OP_NE)
3399                         snprintf(op, sizeof(op), "!=%s", a1);
3400                 else if (port->op == PF_OP_LT)
3401                         snprintf(op, sizeof(op), "<%s", a1);
3402                 else if (port->op == PF_OP_LE)
3403                         snprintf(op, sizeof(op), "<=%s", a1);
3404                 else if (port->op == PF_OP_GT)
3405                         snprintf(op, sizeof(op), ">%s", a1);
3406                 else if (port->op == PF_OP_GE)
3407                         snprintf(op, sizeof(op), ">=%s", a1);
3408                 expand_label_str(label, len, name, op);
3409         }
3410 }
3411
3412 void
3413 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
3414 {
3415         struct protoent *pe;
3416         char n[4];
3417
3418         if (strstr(label, name) != NULL) {
3419                 pe = getprotobynumber(proto);
3420                 if (pe != NULL)
3421                         expand_label_str(label, len, name, pe->p_name);
3422                 else {
3423                         snprintf(n, sizeof(n), "%u", proto);
3424                         expand_label_str(label, len, name, n);
3425                 }
3426         }
3427 }
3428
3429 void
3430 expand_label_nr(const char *name, char *label, size_t len)
3431 {
3432         char n[11];
3433
3434         if (strstr(label, name) != NULL) {
3435                 snprintf(n, sizeof(n), "%u", pf->rule_nr);
3436                 expand_label_str(label, len, name, n);
3437         }
3438 }
3439
3440 void
3441 expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
3442     struct node_host *src_host, struct node_port *src_port,
3443     struct node_host *dst_host, struct node_port *dst_port,
3444     u_int8_t proto)
3445 {
3446         expand_label_if("$if", label, len, ifname);
3447         expand_label_addr("$srcaddr", label, len, af, src_host);
3448         expand_label_addr("$dstaddr", label, len, af, dst_host);
3449         expand_label_port("$srcport", label, len, src_port);
3450         expand_label_port("$dstport", label, len, dst_port);
3451         expand_label_proto("$proto", label, len, proto);
3452         expand_label_nr("$nr", label, len);
3453 }
3454
3455 #ifndef __DragonFly__
3456 int
3457 expand_altq(struct pf_altq *a, struct node_if *interfaces,
3458     struct node_queue *nqueues, struct node_queue_bw bwspec,
3459     struct node_queue_opt *opts)
3460 {
3461         struct pf_altq           pa, pb;
3462         char                     qname[PF_QNAME_SIZE];
3463         struct node_queue       *n;
3464         struct node_queue_bw     bw;
3465         int                      errs = 0;
3466
3467         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
3468                 FREE_LIST(struct node_if, interfaces);
3469                 FREE_LIST(struct node_queue, nqueues);
3470                 return (0);
3471         }
3472
3473         LOOP_THROUGH(struct node_if, interface, interfaces,
3474                 memcpy(&pa, a, sizeof(struct pf_altq));
3475                 if (strlcpy(pa.ifname, interface->ifname,
3476                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
3477                         errx(1, "expand_altq: strlcpy");
3478
3479                 if (interface->not) {
3480                         yyerror("altq on ! <interface> is not supported");
3481                         errs++;
3482                 } else {
3483                         if (eval_pfaltq(pf, &pa, &bwspec, opts))
3484                                 errs++;
3485                         else
3486                                 if (pfctl_add_altq(pf, &pa))
3487                                         errs++;
3488
3489                         if (pf->opts & PF_OPT_VERBOSE) {
3490                                 print_altq(&pf->paltq->altq, 0,
3491                                     &bwspec, opts);
3492                                 if (nqueues && nqueues->tail) {
3493                                         printf("queue { ");
3494                                         LOOP_THROUGH(struct node_queue, queue,
3495                                             nqueues,
3496                                                 printf("%s ",
3497                                                     queue->queue);
3498                                         );
3499                                         printf("}");
3500                                 }
3501                                 printf("\n");
3502                         }
3503
3504                         if (pa.scheduler == ALTQT_CBQ ||
3505                             pa.scheduler == ALTQT_HFSC) {
3506                                 /* now create a root queue */
3507                                 memset(&pb, 0, sizeof(struct pf_altq));
3508                                 if (strlcpy(qname, "root_", sizeof(qname)) >=
3509                                     sizeof(qname))
3510                                         errx(1, "expand_altq: strlcpy");
3511                                 if (strlcat(qname, interface->ifname,
3512                                     sizeof(qname)) >= sizeof(qname))
3513                                         errx(1, "expand_altq: strlcat");
3514                                 if (strlcpy(pb.qname, qname,
3515                                     sizeof(pb.qname)) >= sizeof(pb.qname))
3516                                         errx(1, "expand_altq: strlcpy");
3517                                 if (strlcpy(pb.ifname, interface->ifname,
3518                                     sizeof(pb.ifname)) >= sizeof(pb.ifname))
3519                                         errx(1, "expand_altq: strlcpy");
3520                                 pb.qlimit = pa.qlimit;
3521                                 pb.scheduler = pa.scheduler;
3522                                 bw.bw_absolute = pa.ifbandwidth;
3523                                 bw.bw_percent = 0;
3524                                 if (eval_pfqueue(pf, &pb, &bw, opts))
3525                                         errs++;
3526                                 else
3527                                         if (pfctl_add_altq(pf, &pb))
3528                                                 errs++;
3529                         }
3530
3531                         LOOP_THROUGH(struct node_queue, queue, nqueues,
3532                                 n = calloc(1, sizeof(struct node_queue));
3533                                 if (n == NULL)
3534                                         err(1, "expand_altq: calloc");
3535                                 if (pa.scheduler == ALTQT_CBQ ||
3536                                     pa.scheduler == ALTQT_HFSC)
3537                                         if (strlcpy(n->parent, qname,
3538                                             sizeof(n->parent)) >=
3539                                             sizeof(n->parent))
3540                                                 errx(1, "expand_altq: strlcpy");
3541                                 if (strlcpy(n->queue, queue->queue,
3542                                     sizeof(n->queue)) >= sizeof(n->queue))
3543                                         errx(1, "expand_altq: strlcpy");
3544                                 if (strlcpy(n->ifname, interface->ifname,
3545                                     sizeof(n->ifname)) >= sizeof(n->ifname))
3546                                         errx(1, "expand_altq: strlcpy");
3547                                 n->scheduler = pa.scheduler;
3548                                 n->next = NULL;
3549                                 n->tail = n;
3550                                 if (queues == NULL)
3551                                         queues = n;
3552                                 else {
3553                                         queues->tail->next = n;
3554                                         queues->tail = n;
3555                                 }
3556                         );
3557                 }
3558         );
3559         FREE_LIST(struct node_if, interfaces);
3560         FREE_LIST(struct node_queue, nqueues);
3561
3562         return (errs);
3563 }
3564
3565 int
3566 expand_queue(struct pf_altq *a, struct node_if *interfaces,
3567     struct node_queue *nqueues, struct node_queue_bw bwspec,
3568     struct node_queue_opt *opts)
3569 {
3570         struct node_queue       *n, *nq;
3571         struct pf_altq           pa;
3572         u_int8_t                 found = 0;
3573         u_int8_t                 errs = 0;
3574
3575         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
3576                 FREE_LIST(struct node_queue, nqueues);
3577                 return (0);
3578         }
3579
3580         if (queues == NULL) {
3581                 yyerror("queue %s has no parent", a->qname);
3582                 FREE_LIST(struct node_queue, nqueues);
3583                 return (1);
3584         }
3585
3586         LOOP_THROUGH(struct node_if, interface, interfaces,
3587                 LOOP_THROUGH(struct node_queue, tqueue, queues,
3588                         if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
3589                             (interface->ifname[0] == 0 ||
3590                             (!interface->not && !strncmp(interface->ifname,
3591                             tqueue->ifname, IFNAMSIZ)) ||
3592                             (interface->not && strncmp(interface->ifname,
3593                             tqueue->ifname, IFNAMSIZ)))) {
3594                                 /* found ourself in queues */
3595                                 found++;
3596
3597                                 memcpy(&pa, a, sizeof(struct pf_altq));
3598
3599                                 if (pa.scheduler != ALTQT_NONE &&
3600                                     pa.scheduler != tqueue->scheduler) {
3601                                         yyerror("exactly one scheduler type "
3602                                             "per interface allowed");
3603                                         return (1);
3604                                 }
3605                                 pa.scheduler = tqueue->scheduler;
3606
3607                                 /* scheduler dependent error checking */
3608                                 switch (pa.scheduler) {
3609                                 case ALTQT_PRIQ:
3610                                         if (nqueues != NULL) {
3611                                                 yyerror("priq queues cannot "
3612                                                     "have child queues");
3613                                                 return (1);
3614                                         }
3615                                         if (bwspec.bw_absolute > 0 ||
3616                                             bwspec.bw_percent < 100) {
3617                                                 yyerror("priq doesn't take "
3618                                                     "bandwidth");
3619                                                 return (1);
3620                                         }
3621                                         break;
3622                                 default:
3623                                         break;
3624                                 }
3625
3626                                 if (strlcpy(pa.ifname, tqueue->ifname,
3627                                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
3628                                         errx(1, "expand_queue: strlcpy");
3629                                 if (strlcpy(pa.parent, tqueue->parent,
3630                                     sizeof(pa.parent)) >= sizeof(pa.parent))
3631                                         errx(1, "expand_queue: strlcpy");
3632
3633                                 if (eval_pfqueue(pf, &pa, &bwspec, opts))
3634                                         errs++;
3635                                 else
3636                                         if (pfctl_add_altq(pf, &pa))
3637                                                 errs++;
3638
3639                                 for (nq = nqueues; nq != NULL; nq = nq->next) {
3640                                         if (!strcmp(a->qname, nq->queue)) {
3641                                                 yyerror("queue cannot have "
3642                                                     "itself as child");
3643                                                 errs++;
3644                                                 continue;
3645                                         }
3646                                         n = calloc(1,
3647                                             sizeof(struct node_queue));
3648                                         if (n == NULL)
3649                                                 err(1, "expand_queue: calloc");
3650                                         if (strlcpy(n->parent, a->qname,
3651                                             sizeof(n->parent)) >=
3652                                             sizeof(n->parent))
3653                                                 errx(1, "expand_queue strlcpy");
3654                                         if (strlcpy(n->queue, nq->queue,
3655                                             sizeof(n->queue)) >=
3656                                             sizeof(n->queue))
3657                                                 errx(1, "expand_queue strlcpy");
3658                                         if (strlcpy(n->ifname, tqueue->ifname,
3659                                             sizeof(n->ifname)) >=
3660                                             sizeof(n->ifname))
3661                                                 errx(1, "expand_queue strlcpy");
3662                                         n->scheduler = tqueue->scheduler;
3663                                         n->next = NULL;
3664                                         n->tail = n;
3665                                         if (queues == NULL)
3666                                                 queues = n;
3667                                         else {
3668                                                 queues->tail->next = n;
3669                                                 queues->tail = n;
3670                                         }
3671                                 }
3672                                 if ((pf->opts & PF_OPT_VERBOSE) && (
3673                                     (found == 1 && interface->ifname[0] == 0) ||
3674                                     (found > 0 && interface->ifname[0] != 0))) {
3675                                         print_queue(&pf->paltq->altq, 0,
3676                                             &bwspec, interface->ifname[0] != 0,
3677                                             opts);
3678                                         if (nqueues && nqueues->tail) {
3679                                                 printf("{ ");
3680                                                 LOOP_THROUGH(struct node_queue,
3681                                                     queue, nqueues,
3682                                                         printf("%s ",
3683                                                             queue->queue);
3684                                                 );
3685                                                 printf("}");
3686                                         }
3687                                         printf("\n");
3688                                 }
3689                         }
3690                 );
3691         );
3692
3693         FREE_LIST(struct node_queue, nqueues);
3694         FREE_LIST(struct node_if, interfaces);
3695
3696         if (!found) {
3697                 yyerror("queue %s has no parent", a->qname);
3698                 errs++;
3699         }
3700
3701         if (errs)
3702                 return (1);
3703         else
3704                 return (0);
3705 }
3706 #endif
3707
3708 void
3709 expand_rule(struct pf_rule *r,
3710     struct node_if *interfaces, struct node_host *rpool_hosts,
3711     struct node_proto *protos, struct node_os *src_oses,
3712     struct node_host *src_hosts, struct node_port *src_ports,
3713     struct node_host *dst_hosts, struct node_port *dst_ports,
3714     struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types)
3715 {
3716         sa_family_t              af = r->af;
3717         int                      added = 0, error = 0;
3718         char                     ifname[IF_NAMESIZE];
3719         char                     label[PF_RULE_LABEL_SIZE];
3720         char                     tagname[PF_TAG_NAME_SIZE];
3721         char                     match_tagname[PF_TAG_NAME_SIZE];
3722         struct pf_pooladdr      *pa;
3723         struct node_host        *h;
3724         u_int8_t                 flags, flagset, keep_state;
3725
3726         if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
3727                 errx(1, "expand_rule: strlcpy");
3728         if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
3729                 errx(1, "expand_rule: strlcpy");
3730         if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
3731             sizeof(match_tagname))
3732                 errx(1, "expand_rule: strlcpy");
3733         flags = r->flags;
3734         flagset = r->flagset;
3735         keep_state = r->keep_state;
3736
3737         LOOP_THROUGH(struct node_if, interface, interfaces,
3738         LOOP_THROUGH(struct node_proto, proto, protos,
3739         LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
3740         LOOP_THROUGH(struct node_host, src_host, src_hosts,
3741         LOOP_THROUGH(struct node_port, src_port, src_ports,
3742         LOOP_THROUGH(struct node_os, src_os, src_oses,
3743         LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
3744         LOOP_THROUGH(struct node_port, dst_port, dst_ports,
3745         LOOP_THROUGH(struct node_uid, uid, uids,
3746         LOOP_THROUGH(struct node_gid, gid, gids,
3747
3748                 r->af = af;
3749                 /* for link-local IPv6 address, interface must match up */
3750                 if ((r->af && src_host->af && r->af != src_host->af) ||
3751                     (r->af && dst_host->af && r->af != dst_host->af) ||
3752                     (src_host->af && dst_host->af &&
3753                     src_host->af != dst_host->af) ||
3754                     (src_host->ifindex && dst_host->ifindex &&
3755                     src_host->ifindex != dst_host->ifindex) ||
3756                     (src_host->ifindex && *interface->ifname &&
3757                     src_host->ifindex != if_nametoindex(interface->ifname)) ||
3758                     (dst_host->ifindex && *interface->ifname &&
3759                     dst_host->ifindex != if_nametoindex(interface->ifname)))
3760                         continue;
3761                 if (!r->af && src_host->af)
3762                         r->af = src_host->af;
3763                 else if (!r->af && dst_host->af)
3764                         r->af = dst_host->af;
3765
3766                 if (*interface->ifname)
3767                         memcpy(r->ifname, interface->ifname, sizeof(r->ifname));
3768                 else if (if_indextoname(src_host->ifindex, ifname))
3769                         memcpy(r->ifname, ifname, sizeof(r->ifname));
3770                 else if (if_indextoname(dst_host->ifindex, ifname))
3771                         memcpy(r->ifname, ifname, sizeof(r->ifname));
3772                 else
3773                         memset(r->ifname, '\0', sizeof(r->ifname));
3774
3775                 if (strlcpy(r->label, label, sizeof(r->label)) >=
3776                     sizeof(r->label))
3777                         errx(1, "expand_rule: strlcpy");
3778                 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
3779                     sizeof(r->tagname))
3780                         errx(1, "expand_rule: strlcpy");
3781                 if (strlcpy(r->match_tagname, match_tagname,
3782                     sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
3783                         errx(1, "expand_rule: strlcpy");
3784                 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
3785                     src_host, src_port, dst_host, dst_port, proto->proto);
3786                 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
3787                     src_host, src_port, dst_host, dst_port, proto->proto);
3788                 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
3789                     r->af, src_host, src_port, dst_host, dst_port,
3790                     proto->proto);
3791
3792                 error += check_netmask(src_host, r->af);
3793                 error += check_netmask(dst_host, r->af);
3794
3795                 r->ifnot = interface->not;
3796                 r->proto = proto->proto;
3797                 r->src.addr = src_host->addr;
3798                 r->src.not = src_host->not;
3799                 r->src.port[0] = src_port->port[0];
3800                 r->src.port[1] = src_port->port[1];
3801                 r->src.port_op = src_port->op;
3802                 r->dst.addr = dst_host->addr;
3803                 r->dst.not = dst_host->not;
3804                 r->dst.port[0] = dst_port->port[0];
3805                 r->dst.port[1] = dst_port->port[1];
3806                 r->dst.port_op = dst_port->op;
3807                 r->uid.op = uid->op;
3808                 r->uid.uid[0] = uid->uid[0];
3809                 r->uid.uid[1] = uid->uid[1];
3810                 r->gid.op = gid->op;
3811                 r->gid.gid[0] = gid->gid[0];
3812                 r->gid.gid[1] = gid->gid[1];
3813                 r->type = icmp_type->type;
3814                 r->code = icmp_type->code;
3815
3816                 if ((keep_state == PF_STATE_MODULATE ||
3817                     keep_state == PF_STATE_SYNPROXY) &&
3818                     r->proto && r->proto != IPPROTO_TCP)
3819                         r->keep_state = PF_STATE_NORMAL;
3820                 else
3821                         r->keep_state = keep_state;
3822
3823                 if (r->proto && r->proto != IPPROTO_TCP) {
3824                         r->flags = 0;
3825                         r->flagset = 0;
3826                 } else {
3827                         r->flags = flags;
3828                         r->flagset = flagset;
3829                 }
3830                 if (icmp_type->proto && r->proto != icmp_type->proto) {
3831                         yyerror("icmp-type mismatch");
3832                         error++;
3833                 }
3834
3835                 if (src_os && src_os->os) {
3836                         r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
3837                         if ((pf->opts & PF_OPT_VERBOSE2) &&
3838                             r->os_fingerprint == PF_OSFP_NOMATCH)
3839                                 fprintf(stderr,
3840                                     "warning: unknown '%s' OS fingerprint\n",
3841                                     src_os->os);
3842                 } else {
3843                         r->os_fingerprint = PF_OSFP_ANY;
3844                 }
3845
3846                 TAILQ_INIT(&r->rpool.list);
3847                 for (h = rpool_hosts; h != NULL; h = h->next) {
3848                         pa = calloc(1, sizeof(struct pf_pooladdr));
3849                         if (pa == NULL)
3850                                 err(1, "expand_rule: calloc");
3851                         pa->addr = h->addr;
3852                         if (h->ifname != NULL) {
3853                                 if (strlcpy(pa->ifname, h->ifname,
3854                                     sizeof(pa->ifname)) >=
3855                                     sizeof(pa->ifname))
3856                                         errx(1, "expand_rule: strlcpy");
3857                         } else
3858                                 pa->ifname[0] = 0;
3859                         TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
3860                 }
3861
3862                 if (rule_consistent(r) < 0 || error)
3863                         yyerror("skipping rule due to errors");
3864                 else {
3865                         r->nr = pf->rule_nr++;
3866                         pfctl_add_rule(pf, r);
3867                         added++;
3868                 }
3869
3870         ))))))))));
3871
3872         FREE_LIST(struct node_if, interfaces);
3873         FREE_LIST(struct node_proto, protos);
3874         FREE_LIST(struct node_host, src_hosts);
3875         FREE_LIST(struct node_port, src_ports);
3876         FREE_LIST(struct node_os, src_oses);
3877         FREE_LIST(struct node_host, dst_hosts);
3878         FREE_LIST(struct node_port, dst_ports);
3879         FREE_LIST(struct node_uid, uids);
3880         FREE_LIST(struct node_gid, gids);
3881         FREE_LIST(struct node_icmp, icmp_types);
3882         FREE_LIST(struct node_host, rpool_hosts);
3883
3884         if (!added)
3885                 yyerror("rule expands to no valid combination");
3886 }
3887
3888 #undef FREE_LIST
3889 #undef LOOP_THROUGH
3890
3891 int
3892 check_rulestate(int desired_state)
3893 {
3894         if (require_order && (rulestate > desired_state)) {
3895                 yyerror("Rules must be in order: options, normalization, "
3896                     "queueing, translation, filtering");
3897                 return (1);
3898         }
3899         rulestate = desired_state;
3900         return (0);
3901 }
3902
3903 int
3904 kw_cmp(const void *k, const void *e)
3905 {
3906         return (strcmp(k, ((const struct keywords *)e)->k_name));
3907 }
3908
3909 int
3910 lookup(char *s)
3911 {
3912         /* this has to be sorted always */
3913         static const struct keywords keywords[] = {
3914                 { "all",                ALL},
3915                 { "allow-opts",         ALLOWOPTS},
3916                 { "altq",               ALTQ},
3917                 { "anchor",             ANCHOR},
3918                 { "antispoof",          ANTISPOOF},
3919                 { "any",                ANY},
3920                 { "bandwidth",          BANDWIDTH},
3921                 { "binat",              BINAT},
3922                 { "binat-anchor",       BINATANCHOR},
3923                 { "bitmask",            BITMASK},
3924                 { "block",              BLOCK},
3925                 { "block-policy",       BLOCKPOLICY},
3926                 { "cbq",                CBQ},
3927                 { "code",               CODE},
3928                 { "crop",               FRAGCROP},
3929                 { "debug",              DEBUG},
3930                 { "drop",               DROP},
3931                 { "drop-ovl",           FRAGDROP},
3932                 { "dup-to",             DUPTO},
3933                 { "fastroute",          FASTROUTE},
3934                 { "file",               FILENAME},
3935                 { "fingerprints",       FINGERPRINTS},
3936                 { "flags",              FLAGS},
3937                 { "floating",           FLOATING},
3938                 { "for",                FOR},
3939                 { "fragment",           FRAGMENT},
3940                 { "from",               FROM},
3941                 { "global",             GLOBAL},
3942                 { "group",              GROUP},
3943                 { "group-bound",        GRBOUND},
3944                 { "hfsc",               HFSC},
3945                 { "hostid",             HOSTID},
3946                 { "icmp-type",          ICMPTYPE},
3947                 { "icmp6-type",         ICMP6TYPE},
3948                 { "if-bound",           IFBOUND},
3949                 { "in",                 IN},
3950                 { "inet",               INET},
3951                 { "inet6",              INET6},
3952                 { "keep",               KEEP},
3953                 { "label",              LABEL},
3954                 { "limit",              LIMIT},
3955                 { "linkshare",          LINKSHARE},
3956                 { "load",               LOAD},
3957                 { "log",                LOG},
3958                 { "log-all",            LOGALL},
3959                 { "loginterface",       LOGINTERFACE},
3960                 { "max",                MAXIMUM},
3961                 { "max-mss",            MAXMSS},
3962                 { "max-src-nodes",      MAXSRCNODES},
3963                 { "max-src-states",     MAXSRCSTATES},
3964                 { "min-ttl",            MINTTL},
3965                 { "modulate",           MODULATE},
3966                 { "nat",                NAT},
3967                 { "nat-anchor",         NATANCHOR},
3968                 { "no",                 NO},
3969                 { "no-df",              NODF},
3970                 { "no-route",           NOROUTE},
3971                 { "no-sync",            NOSYNC},
3972                 { "on",                 ON},
3973                 { "optimization",       OPTIMIZATION},
3974                 { "os",                 OS},
3975                 { "out",                OUT},
3976                 { "pass",               PASS},
3977                 { "port",               PORT},
3978                 { "priority",           PRIORITY},
3979                 { "priq",               PRIQ},
3980                 { "proto",              PROTO},
3981                 { "qlimit",             QLIMIT},
3982                 { "queue",              QUEUE},
3983                 { "quick",              QUICK},
3984                 { "random",             RANDOM},
3985                 { "random-id",          RANDOMID},
3986                 { "rdr",                RDR},
3987                 { "rdr-anchor",         RDRANCHOR},
3988                 { "realtime",           REALTIME},
3989                 { "reassemble",         REASSEMBLE},
3990                 { "reply-to",           REPLYTO},
3991                 { "require-order",      REQUIREORDER},
3992                 { "return",             RETURN},
3993                 { "return-icmp",        RETURNICMP},
3994                 { "return-icmp6",       RETURNICMP6},
3995                 { "return-rst",         RETURNRST},
3996                 { "round-robin",        ROUNDROBIN},
3997                 { "route-to",           ROUTETO},
3998                 { "rule",               RULE},
3999                 { "scrub",              SCRUB},
4000                 { "set",                SET},
4001                 { "source-hash",        SOURCEHASH},
4002                 { "source-track",       SOURCETRACK},
4003                 { "state",              STATE},
4004                 { "state-policy",       STATEPOLICY},
4005                 { "static-port",        STATICPORT},
4006                 { "sticky-address",     STICKYADDRESS},
4007                 { "synproxy",           SYNPROXY},
4008                 { "table",              TABLE},
4009                 { "tag",                TAG},
4010                 { "tagged",             TAGGED},
4011                 { "tbrsize",            TBRSIZE},
4012                 { "timeout",            TIMEOUT},
4013                 { "to",                 TO},
4014                 { "tos",                TOS},
4015                 { "ttl",                TTL},
4016                 { "upperlimit",         UPPERLIMIT},
4017                 { "user",               USER},
4018         };
4019         const struct keywords   *p;
4020
4021         p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
4022             sizeof(keywords[0]), kw_cmp);
4023
4024         if (p) {
4025                 if (debug > 1)
4026                         fprintf(stderr, "%s: %d\n", s, p->k_val);
4027                 return (p->k_val);
4028         } else {
4029                 if (debug > 1)
4030                         fprintf(stderr, "string: %s\n", s);
4031                 return (STRING);
4032         }
4033 }
4034
4035 #define MAXPUSHBACK     128
4036
4037 char    *parsebuf;
4038 int      parseindex;
4039 char     pushback_buffer[MAXPUSHBACK];
4040 int      pushback_index = 0;
4041
4042 int
4043 lgetc(FILE *f)
4044 {
4045         int     c, next;
4046
4047         if (parsebuf) {
4048                 /* Read character from the parsebuffer instead of input. */
4049                 if (parseindex >= 0) {
4050                         c = parsebuf[parseindex++];
4051                         if (c != '\0')
4052                                 return (c);
4053                         parsebuf = NULL;
4054                 } else
4055                         parseindex++;
4056         }
4057
4058         if (pushback_index)
4059                 return (pushback_buffer[--pushback_index]);
4060
4061         while ((c = getc(f)) == '\\') {
4062                 next = getc(f);
4063                 if (next != '\n') {
4064                         if (isspace(next))
4065                                 yyerror("whitespace after \\");
4066                         ungetc(next, f);
4067                         break;
4068                 }
4069                 yylval.lineno = lineno;
4070                 lineno++;
4071         }
4072         if (c == '\t' || c == ' ') {
4073                 /* Compress blanks to a single space. */
4074                 do {
4075                         c = getc(f);
4076                 } while (c == '\t' || c == ' ');
4077                 ungetc(c, f);
4078                 c = ' ';
4079         }
4080
4081         return (c);
4082 }
4083
4084 int
4085 lungetc(int c)
4086 {
4087         if (c == EOF)
4088                 return (EOF);
4089         if (parsebuf) {
4090                 parseindex--;
4091                 if (parseindex >= 0)
4092                         return (c);
4093         }
4094         if (pushback_index < MAXPUSHBACK-1)
4095                 return (pushback_buffer[pushback_index++] = c);
4096         else
4097                 return (EOF);
4098 }
4099
4100 int
4101 findeol(void)
4102 {
4103         int     c;
4104
4105         parsebuf = NULL;
4106         pushback_index = 0;
4107
4108         /* skip to either EOF or the first real EOL */
4109         while (1) {
4110                 c = lgetc(fin);
4111                 if (c == '\n') {
4112                         lineno++;
4113                         break;
4114                 }
4115                 if (c == EOF)
4116                         break;
4117         }
4118         return (ERROR);
4119 }
4120
4121 int
4122 yylex(void)
4123 {
4124         char     buf[8096];
4125         char    *p, *val;
4126         int      endc, c, next;
4127         int      token;
4128
4129 top:
4130         p = buf;
4131         while ((c = lgetc(fin)) == ' ')
4132                 ; /* nothing */
4133
4134         yylval.lineno = lineno;
4135         if (c == '#')
4136                 while ((c = lgetc(fin)) != '\n' && c != EOF)
4137                         ; /* nothing */
4138         if (c == '$' && parsebuf == NULL) {
4139                 while (1) {
4140                         if ((c = lgetc(fin)) == EOF)
4141                                 return (0);
4142
4143                         if (p + 1 >= buf + sizeof(buf) - 1) {
4144                                 yyerror("string too long");
4145                                 return (findeol());
4146                         }
4147                         if (isalnum(c) || c == '_') {
4148                                 *p++ = (char)c;
4149                                 continue;
4150                         }
4151                         *p = '\0';
4152                         lungetc(c);
4153                         break;
4154                 }
4155                 val = symget(buf);
4156                 if (val == NULL) {
4157                         yyerror("macro '%s' not defined", buf);
4158                         return (findeol());
4159                 }
4160                 parsebuf = val;
4161                 parseindex = 0;
4162                 goto top;
4163         }
4164
4165         switch (c) {
4166         case '\'':
4167         case '"':
4168                 endc = c;
4169                 while (1) {
4170                         if ((c = lgetc(fin)) == EOF)
4171                                 return (0);
4172                         if (c == endc) {
4173                                 *p = '\0';
4174                                 break;
4175                         }
4176                         if (c == '\n') {
4177                                 lineno++;
4178                                 continue;
4179                         }
4180                         if (p + 1 >= buf + sizeof(buf) - 1) {
4181                                 yyerror("string too long");
4182                                 return (findeol());
4183                         }
4184                         *p++ = (char)c;
4185                 }
4186                 yylval.v.string = strdup(buf);
4187                 if (yylval.v.string == NULL)
4188                         err(1, "yylex: strdup");
4189                 return (STRING);
4190         case '<':
4191                 next = lgetc(fin);
4192                 if (next == '>') {
4193                         yylval.v.i = PF_OP_XRG;
4194                         return (PORTBINARY);
4195                 }
4196                 lungetc(next);
4197                 break;
4198         case '>':
4199                 next = lgetc(fin);
4200                 if (next == '<') {
4201                         yylval.v.i = PF_OP_IRG;
4202                         return (PORTBINARY);
4203                 }
4204                 lungetc(next);
4205                 break;
4206         case '-':
4207                 next = lgetc(fin);
4208                 if (next == '>')
4209                         return (ARROW);
4210                 lungetc(next);
4211                 break;
4212         }
4213
4214 #define allowed_in_string(x) \
4215         (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
4216         x != '{' && x != '}' && x != '<' && x != '>' && \
4217         x != '!' && x != '=' && x != '/' && x != '#' && \
4218         x != ','))
4219
4220         if (isalnum(c) || c == ':' || c == '_') {
4221                 do {
4222                         *p++ = c;
4223                         if ((unsigned)(p-buf) >= sizeof(buf)) {
4224                                 yyerror("string too long");
4225                                 return (findeol());
4226                         }
4227                 } while ((c = lgetc(fin)) != EOF && (allowed_in_string(c)));
4228                 lungetc(c);
4229                 *p = '\0';
4230                 if ((token = lookup(buf)) == STRING)
4231                         if ((yylval.v.string = strdup(buf)) == NULL)
4232                                 err(1, "yylex: strdup");
4233                 return (token);
4234         }
4235         if (c == '\n') {
4236                 yylval.lineno = lineno;
4237                 lineno++;
4238         }
4239         if (c == EOF)
4240                 return (0);
4241         return (c);
4242 }
4243
4244 int
4245 parse_rules(FILE *input, struct pfctl *xpf)
4246 {
4247         struct sym      *sym, *next;
4248
4249         fin = input;
4250         pf = xpf;
4251         lineno = 1;
4252         errors = 0;
4253         rulestate = PFCTL_STATE_NONE;
4254         returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
4255         returnicmp6default =
4256             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
4257         blockpolicy = PFRULE_DROP;
4258         require_order = 1;
4259
4260         yyparse();
4261
4262         /* Free macros and check which have not been used. */
4263         for (sym = TAILQ_FIRST(&symhead); sym != NULL; sym = next) {
4264                 next = TAILQ_NEXT(sym, entries);
4265                 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
4266                         fprintf(stderr, "warning: macro '%s' not "
4267                             "used\n", sym->nam);
4268                 free(sym->nam);
4269                 free(sym->val);
4270                 TAILQ_REMOVE(&symhead, sym, entries);
4271                 free(sym);
4272         }
4273
4274         return (errors ? -1 : 0);
4275 }
4276
4277 /*
4278  * Over-designed efficiency is a French and German concept, so how about
4279  * we wait until they discover this ugliness and make it all fancy.
4280  */
4281 int
4282 symset(const char *nam, const char *val, int persist)
4283 {
4284         struct sym      *sym;
4285
4286         for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
4287             sym = TAILQ_NEXT(sym, entries))
4288                 ;       /* nothing */
4289
4290         if (sym != NULL) {
4291                 if (sym->persist == 1)
4292                         return (0);
4293                 else {
4294                         free(sym->nam);
4295                         free(sym->val);
4296                         TAILQ_REMOVE(&symhead, sym, entries);
4297                         free(sym);
4298                 }
4299         }
4300         if ((sym = calloc(1, sizeof(*sym))) == NULL)
4301                 return (-1);
4302
4303         sym->nam = strdup(nam);
4304         if (sym->nam == NULL) {
4305                 free(sym);
4306                 return (-1);
4307         }
4308         sym->val = strdup(val);
4309         if (sym->val == NULL) {
4310                 free(sym->nam);
4311                 free(sym);
4312                 return (-1);
4313         }
4314         sym->used = 0;
4315         sym->persist = persist;
4316         TAILQ_INSERT_TAIL(&symhead, sym, entries);
4317         return (0);
4318 }
4319
4320 int
4321 pfctl_cmdline_symset(char *s)
4322 {
4323         char    *sym, *val;
4324         int      ret;
4325
4326         if ((val = strrchr(s, '=')) == NULL)
4327                 return (-1);
4328
4329         if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
4330                 err(1, "pfctl_cmdline_symset: malloc");
4331
4332         strlcpy(sym, s, strlen(s) - strlen(val) + 1);
4333
4334         ret = symset(sym, val + 1, 1);
4335         free(sym);
4336
4337         return (ret);
4338 }
4339
4340 char *
4341 symget(const char *nam)
4342 {
4343         struct sym      *sym;
4344
4345         TAILQ_FOREACH(sym, &symhead, entries)
4346                 if (strcmp(nam, sym->nam) == 0) {
4347                         sym->used = 1;
4348                         return (sym->val);
4349                 }
4350         return (NULL);
4351 }
4352
4353 void
4354 decide_address_family(struct node_host *n, sa_family_t *af)
4355 {
4356         sa_family_t     target_af = 0;
4357
4358         while (!*af && n != NULL) {
4359                 if (n->af) {
4360                         if (target_af == 0)
4361                                 target_af = n->af;
4362                         if (target_af != n->af)
4363                                 return;
4364                 }
4365                 n = n->next;
4366         }
4367         if (!*af && target_af)
4368                 *af = target_af;
4369 }
4370
4371 void
4372 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
4373 {
4374         struct node_host        *n = *nh, *prev = NULL;
4375
4376         while (n != NULL) {
4377                 if (*af && n->af && n->af != *af) {
4378                         /* unlink and free n */
4379                         struct node_host *next = n->next;
4380
4381                         /* adjust tail pointer */
4382                         if (n == (*nh)->tail)
4383                                 (*nh)->tail = prev;
4384                         /* adjust previous node's next pointer */
4385                         if (prev == NULL)
4386                                 *nh = next;
4387                         else
4388                                 prev->next = next;
4389                         /* free node */
4390                         if (n->ifname != NULL)
4391                                 free(n->ifname);
4392                         free(n);
4393                         n = next;
4394                 } else {
4395                         if (n->af && !*af)
4396                                 *af = n->af;
4397                         prev = n;
4398                         n = n->next;
4399                 }
4400         }
4401 }
4402
4403 int
4404 invalid_redirect(struct node_host *nh, sa_family_t af)
4405 {
4406         if (!af) {
4407                 struct node_host *n;
4408
4409                 /* tables and dyniftl are ok without an address family */
4410                 for (n = nh; n != NULL; n = n->next) {
4411                         if (n->addr.type != PF_ADDR_TABLE &&
4412                             n->addr.type != PF_ADDR_DYNIFTL) {
4413                                 yyerror("address family not given and "
4414                                     "translation address expands to multiple "
4415                                     "address families");
4416                                 return (1);
4417                         }
4418                 }
4419         }
4420         if (nh == NULL) {
4421                 yyerror("no translation address with matching address family "
4422                     "found.");
4423                 return (1);
4424         }
4425         return (0);
4426 }
4427
4428 int
4429 atoul(char *s, u_long *ulvalp)
4430 {
4431         u_long   ulval;
4432         char    *ep;
4433
4434         errno = 0;
4435         ulval = strtoul(s, &ep, 0);
4436         if (s[0] == '\0' || *ep != '\0')
4437                 return (-1);
4438         if (errno == ERANGE && ulval == ULONG_MAX)
4439                 return (-1);
4440         *ulvalp = ulval;
4441         return (0);
4442 }
4443
4444 int
4445 getservice(char *n)
4446 {
4447         struct servent  *s;
4448         u_long           ulval;
4449
4450         if (atoul(n, &ulval) == 0) {
4451                 if (ulval > 65535) {
4452                         yyerror("illegal port value %d", ulval);
4453                         return (-1);
4454                 }
4455                 return (htons(ulval));
4456         } else {
4457                 s = getservbyname(n, "tcp");
4458                 if (s == NULL)
4459                         s = getservbyname(n, "udp");
4460                 if (s == NULL) {
4461                         yyerror("unknown port %s", n);
4462                         return (-1);
4463                 }
4464                 return (s->s_port);
4465         }
4466 }
4467
4468 int
4469 rule_label(struct pf_rule *r, char *s)
4470 {
4471         if (s) {
4472                 if (strlcpy(r->label, s, sizeof(r->label)) >=
4473                     sizeof(r->label)) {
4474                         yyerror("rule label too long (max %d chars)",
4475                             sizeof(r->label)-1);
4476                         return (-1);
4477                 }
4478         }
4479         return (0);
4480 }
4481
4482 u_int16_t
4483 parseicmpspec(char *w, sa_family_t af)
4484 {
4485         const struct icmpcodeent        *p;
4486         u_long                           ulval;
4487         u_int8_t                         icmptype;
4488
4489         if (af == AF_INET)
4490                 icmptype = returnicmpdefault >> 8;
4491         else
4492                 icmptype = returnicmp6default >> 8;
4493
4494         if (atoul(w, &ulval) == -1) {
4495                 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
4496                         yyerror("unknown icmp code %s", w);
4497                         return (0);
4498                 }
4499                 ulval = p->code;
4500         }
4501         if (ulval > 255) {
4502                 yyerror("invalid icmp code %ld", ulval);
4503                 return (0);
4504         }
4505         return (icmptype << 8 | ulval);
4506 }
4507
4508 int
4509 pfctl_load_anchors(int dev, int opts, struct pfr_buffer *trans)
4510 {
4511         struct loadanchors      *la;
4512
4513         TAILQ_FOREACH(la, &loadanchorshead, entries) {
4514                 if (opts & PF_OPT_VERBOSE)
4515                         fprintf(stderr, "\nLoading anchor %s:%s from %s\n",
4516                             la->anchorname, la->rulesetname, la->filename);
4517                 if (pfctl_rules(dev, la->filename, opts, la->anchorname,
4518                     la->rulesetname, trans) == -1)
4519                         return (-1);
4520         }
4521
4522         return (0);
4523 }
4524