sbin/pfctl/parse.y

   1 /*      $OpenBSD: parse.y,v 1.554 2008/10/17 12:59:53 henning Exp $     */
   2
   3 /*
   4  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
   5  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
   6  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
   7  * Copyright (c) 2002,2003 Henning Brauer. All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29 %{
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/types.h>
  34 #include <sys/socket.h>
  35 #include <sys/stat.h>
  36 #ifdef __FreeBSD__
  37 #include <sys/sysctl.h>
  38 #endif
  39 #include <net/if.h>
  40 #include <netinet/in.h>
  41 #include <netinet/in_systm.h>
  42 #include <netinet/ip.h>
  43 #include <netinet/ip_icmp.h>
  44 #include <netinet/icmp6.h>
  45 #include <net/pfvar.h>
  46 #include <arpa/inet.h>
  47 #include <altq/altq.h>
  48 #include <altq/altq_cbq.h>
  49 #include <altq/altq_priq.h>
  50 #include <altq/altq_hfsc.h>
  51
  52 #include <stdio.h>
  53 #include <unistd.h>
  54 #include <stdlib.h>
  55 #include <netdb.h>
  56 #include <stdarg.h>
  57 #include <errno.h>
  58 #include <string.h>
  59 #include <ctype.h>
  60 #include <math.h>
  61 #include <err.h>
  62 #include <limits.h>
  63 #include <pwd.h>
  64 #include <grp.h>
  65 #include <md5.h>
  66
  67 #include "pfctl_parser.h"
  68 #include "pfctl.h"
  69
  70 static struct pfctl     *pf = NULL;
  71 static int               debug = 0;
  72 static int               rulestate = 0;
  73 static u_int16_t         returnicmpdefault =
  74                             (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
  75 static u_int16_t         returnicmp6default =
  76                             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
  77 static int               blockpolicy = PFRULE_DROP;
  78 static int               require_order = 1;
  79 static int               default_statelock;
  80
  81 TAILQ_HEAD(files, file)          files = TAILQ_HEAD_INITIALIZER(files);
  82 static struct file {
  83         TAILQ_ENTRY(file)        entry;
  84         FILE                    *stream;
  85         char                    *name;
  86         int                      lineno;
  87         int                      errors;
  88 } *file;
  89 struct file     *pushfile(const char *, int);
  90 int              popfile(void);
  91 int              check_file_secrecy(int, const char *);
  92 int              yyparse(void);
  93 int              yylex(void);
  94 int              yyerror(const char *, ...);
  95 int              kw_cmp(const void *, const void *);
  96 int              lookup(char *);
  97 int              lgetc(int);
  98 int              lungetc(int);
  99 int              findeol(void);
 100
 101 TAILQ_HEAD(symhead, sym)         symhead = TAILQ_HEAD_INITIALIZER(symhead);
 102 struct sym {
 103         TAILQ_ENTRY(sym)         entry;
 104         int                      used;
 105         int                      persist;
 106         char                    *nam;
 107         char                    *val;
 108 };
 109 int              symset(const char *, const char *, int);
 110 char            *symget(const char *);
 111
 112 int              atoul(char *, u_long *);
 113
 114 enum {
 115         PFCTL_STATE_NONE,
 116         PFCTL_STATE_OPTION,
 117         PFCTL_STATE_SCRUB,
 118         PFCTL_STATE_QUEUE,
 119         PFCTL_STATE_NAT,
 120         PFCTL_STATE_FILTER
 121 };
 122
 123 struct node_proto {
 124         u_int8_t                 proto;
 125         struct node_proto       *next;
 126         struct node_proto       *tail;
 127 };
 128
 129 struct node_port {
 130         u_int16_t                port[2];
 131         u_int8_t                 op;
 132         struct node_port        *next;
 133         struct node_port        *tail;
 134 };
 135
 136 struct node_uid {
 137         uid_t                    uid[2];
 138         u_int8_t                 op;
 139         struct node_uid         *next;
 140         struct node_uid         *tail;
 141 };
 142
 143 struct node_gid {
 144         gid_t                    gid[2];
 145         u_int8_t                 op;
 146         struct node_gid         *next;
 147         struct node_gid         *tail;
 148 };
 149
 150 struct node_icmp {
 151         u_int8_t                 code;
 152         u_int8_t                 type;
 153         u_int8_t                 proto;
 154         struct node_icmp        *next;
 155         struct node_icmp        *tail;
 156 };
 157
 158 enum    { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
 159             PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
 160             PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
 161             PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
 162             PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, };
 163
 164 enum    { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
 165
 166 struct node_state_opt {
 167         int                      type;
 168         union {
 169                 u_int32_t        max_states;
 170                 u_int32_t        max_src_states;
 171                 u_int32_t        max_src_conn;
 172                 struct {
 173                         u_int32_t       limit;
 174                         u_int32_t       seconds;
 175                 }                max_src_conn_rate;
 176                 struct {
 177                         u_int8_t        flush;
 178                         char            tblname[PF_TABLE_NAME_SIZE];
 179                 }                overload;
 180                 u_int32_t        max_src_nodes;
 181                 u_int8_t         src_track;
 182                 u_int32_t        statelock;
 183                 struct {
 184                         int             number;
 185                         u_int32_t       seconds;
 186                 }                timeout;
 187         }                        data;
 188         struct node_state_opt   *next;
 189         struct node_state_opt   *tail;
 190 };
 191
 192 struct peer {
 193         struct node_host        *host;
 194         struct node_port        *port;
 195 };
 196
 197 struct node_queue {
 198         char                     queue[PF_QNAME_SIZE];
 199         char                     parent[PF_QNAME_SIZE];
 200         char                     ifname[IFNAMSIZ];
 201         int                      scheduler;
 202         struct node_queue       *next;
 203         struct node_queue       *tail;
 204 }       *queues = NULL;
 205
 206 struct node_qassign {
 207         char            *qname;
 208         char            *pqname;
 209 };
 210
 211 struct filter_opts {
 212         int                      marker;
 213 #define FOM_FLAGS       0x01
 214 #define FOM_ICMP        0x02
 215 #define FOM_TOS         0x04
 216 #define FOM_KEEP        0x08
 217 #define FOM_SRCTRACK    0x10
 218         struct node_uid         *uid;
 219         struct node_gid         *gid;
 220         struct {
 221                 u_int8_t         b1;
 222                 u_int8_t         b2;
 223                 u_int16_t        w;
 224                 u_int16_t        w2;
 225         } flags;
 226         struct node_icmp        *icmpspec;
 227         u_int32_t                tos;
 228         u_int32_t                prob;
 229         struct {
 230                 int                      action;
 231                 struct node_state_opt   *options;
 232         } keep;
 233         int                      fragment;
 234         int                      allowopts;
 235         char                    *label;
 236         struct node_qassign      queues;
 237         char                    *tag;
 238         char                    *match_tag;
 239         u_int8_t                 match_tag_not;
 240         u_int                    rtableid;
 241         struct {
 242                 struct node_host        *addr;
 243                 u_int16_t               port;
 244         }                        divert;
 245 } filter_opts;
 246
 247 struct antispoof_opts {
 248         char                    *label;
 249         u_int                    rtableid;
 250 } antispoof_opts;
 251
 252 struct scrub_opts {
 253         int                      marker;
 254 #define SOM_MINTTL      0x01
 255 #define SOM_MAXMSS      0x02
 256 #define SOM_FRAGCACHE   0x04
 257 #define SOM_SETTOS      0x08
 258         int                      nodf;
 259         int                      minttl;
 260         int                      maxmss;
 261         int                      settos;
 262         int                      fragcache;
 263         int                      randomid;
 264         int                      reassemble_tcp;
 265         char                    *match_tag;
 266         u_int8_t                 match_tag_not;
 267         u_int                    rtableid;
 268 } scrub_opts;
 269
 270 struct queue_opts {
 271         int                     marker;
 272 #define QOM_BWSPEC      0x01
 273 #define QOM_SCHEDULER   0x02
 274 #define QOM_PRIORITY    0x04
 275 #define QOM_TBRSIZE     0x08
 276 #define QOM_QLIMIT      0x10
 277         struct node_queue_bw    queue_bwspec;
 278         struct node_queue_opt   scheduler;
 279         int                     priority;
 280         int                     tbrsize;
 281         int                     qlimit;
 282 } queue_opts;
 283
 284 struct table_opts {
 285         int                     flags;
 286         int                     init_addr;
 287         struct node_tinithead   init_nodes;
 288 } table_opts;
 289
 290 struct pool_opts {
 291         int                      marker;
 292 #define POM_TYPE                0x01
 293 #define POM_STICKYADDRESS       0x02
 294         u_int8_t                 opts;
 295         int                      type;
 296         int                      staticport;
 297         struct pf_poolhashkey   *key;
 298
 299 } pool_opts;
 300
 301
 302 struct node_hfsc_opts    hfsc_opts;
 303 struct node_state_opt   *keep_state_defaults = NULL;
 304
 305 int              disallow_table(struct node_host *, const char *);
 306 int              disallow_urpf_failed(struct node_host *, const char *);
 307 int              disallow_alias(struct node_host *, const char *);
 308 int              rule_consistent(struct pf_rule *, int);
 309 int              filter_consistent(struct pf_rule *, int);
 310 int              nat_consistent(struct pf_rule *);
 311 int              rdr_consistent(struct pf_rule *);
 312 int              process_tabledef(char *, struct table_opts *);
 313 void             expand_label_str(char *, size_t, const char *, const char *);
 314 void             expand_label_if(const char *, char *, size_t, const char *);
 315 void             expand_label_addr(const char *, char *, size_t, u_int8_t,
 316                     struct node_host *);
 317 void             expand_label_port(const char *, char *, size_t,
 318                     struct node_port *);
 319 void             expand_label_proto(const char *, char *, size_t, u_int8_t);
 320 void             expand_label_nr(const char *, char *, size_t);
 321 void             expand_label(char *, size_t, const char *, u_int8_t,
 322                     struct node_host *, struct node_port *, struct node_host *,
 323                     struct node_port *, u_int8_t);
 324 void             expand_rule(struct pf_rule *, struct node_if *,
 325                     struct node_host *, struct node_proto *, struct node_os *,
 326                     struct node_host *, struct node_port *, struct node_host *,
 327                     struct node_port *, struct node_uid *, struct node_gid *,
 328                     struct node_icmp *, const char *);
 329 int              expand_altq(struct pf_altq *, struct node_if *,
 330                     struct node_queue *, struct node_queue_bw bwspec,
 331                     struct node_queue_opt *);
 332 int              expand_queue(struct pf_altq *, struct node_if *,
 333                     struct node_queue *, struct node_queue_bw,
 334                     struct node_queue_opt *);
 335 int              expand_skip_interface(struct node_if *);
 336
 337 int      check_rulestate(int);
 338 int      getservice(char *);
 339 int      rule_label(struct pf_rule *, char *);
 340 int      rt_tableid_max(void);
 341
 342 void     mv_rules(struct pf_ruleset *, struct pf_ruleset *);
 343 void     decide_address_family(struct node_host *, sa_family_t *);
 344 void     remove_invalid_hosts(struct node_host **, sa_family_t *);
 345 int      invalid_redirect(struct node_host *, sa_family_t);
 346 u_int16_t parseicmpspec(char *, sa_family_t);
 347
 348 TAILQ_HEAD(loadanchorshead, loadanchors)
 349     loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
 350
 351 struct loadanchors {
 352         TAILQ_ENTRY(loadanchors)         entries;
 353         char                            *anchorname;
 354         char                            *filename;
 355 };
 356
 357 typedef struct {
 358         union {
 359                 int64_t                  number;
 360                 double                   probability;
 361                 int                      i;
 362                 char                    *string;
 363                 u_int                    rtableid;
 364                 struct {
 365                         u_int8_t         b1;
 366                         u_int8_t         b2;
 367                         u_int16_t        w;
 368                         u_int16_t        w2;
 369                 }                        b;
 370                 struct range {
 371                         int              a;
 372                         int              b;
 373                         int              t;
 374                 }                        range;
 375                 struct node_if          *interface;
 376                 struct node_proto       *proto;
 377                 struct node_icmp        *icmp;
 378                 struct node_host        *host;
 379                 struct node_os          *os;
 380                 struct node_port        *port;
 381                 struct node_uid         *uid;
 382                 struct node_gid         *gid;
 383                 struct node_state_opt   *state_opt;
 384                 struct peer              peer;
 385                 struct {
 386                         struct peer      src, dst;
 387                         struct node_os  *src_os;
 388                 }                        fromto;
 389                 struct {
 390                         struct node_host        *host;
 391                         u_int8_t                 rt;
 392                         u_int8_t                 pool_opts;
 393                         sa_family_t              af;
 394                         struct pf_poolhashkey   *key;
 395                 }                        route;
 396                 struct redirection {
 397                         struct node_host        *host;
 398                         struct range             rport;
 399                 }                       *redirection;
 400                 struct {
 401                         int                      action;
 402                         struct node_state_opt   *options;
 403                 }                        keep_state;
 404                 struct {
 405                         u_int8_t         log;
 406                         u_int8_t         logif;
 407                         u_int8_t         quick;
 408                 }                        logquick;
 409                 struct {
 410                         int              neg;
 411                         char            *name;
 412                 }                        tagged;
 413                 struct pf_poolhashkey   *hashkey;
 414                 struct node_queue       *queue;
 415                 struct node_queue_opt    queue_options;
 416                 struct node_queue_bw     queue_bwspec;
 417                 struct node_qassign      qassign;
 418                 struct filter_opts       filter_opts;
 419                 struct antispoof_opts    antispoof_opts;
 420                 struct queue_opts        queue_opts;
 421                 struct scrub_opts        scrub_opts;
 422                 struct table_opts        table_opts;
 423                 struct pool_opts         pool_opts;
 424                 struct node_hfsc_opts    hfsc_opts;
 425         } v;
 426         int lineno;
 427 } YYSTYPE;
 428
 429 #define PPORT_RANGE     1
 430 #define PPORT_STAR      2
 431 int     parseport(char *, struct range *r, int);
 432
 433 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
 434         (!((addr).iflags & PFI_AFLAG_NOALIAS) ||                 \
 435         !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
 436
 437 %}
 438
 439 %token  PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
 440 %token  RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
 441 %token  ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
 442 %token  MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
 443 %token  NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
 444 %token  REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
 445 %token  SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
 446 %token  REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
 447 %token  ANTISPOOF FOR INCLUDE
 448 %token  BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY
 449 %token  ALTQ CBQ PRIQ HFSC BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT
 450 %token  QUEUE PRIORITY QLIMIT RTABLE
 451 %token  LOAD RULESET_OPTIMIZATION
 452 %token  STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
 453 %token  MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY
 454 %token  TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
 455 %token  DIVERTTO DIVERTREPLY
 456 %token  <v.string>              STRING
 457 %token  <v.number>              NUMBER
 458 %token  <v.i>                   PORTBINARY
 459 %type   <v.interface>           interface if_list if_item_not if_item
 460 %type   <v.number>              number icmptype icmp6type uid gid
 461 %type   <v.number>              tos not yesno
 462 %type   <v.probability>         probability
 463 %type   <v.i>                   no dir af fragcache optimizer
 464 %type   <v.i>                   sourcetrack flush unaryop statelock
 465 %type   <v.b>                   action nataction natpasslog scrubaction
 466 %type   <v.b>                   flags flag blockspec
 467 %type   <v.range>               portplain portstar portrange
 468 %type   <v.hashkey>             hashkey
 469 %type   <v.proto>               proto proto_list proto_item
 470 %type   <v.number>              protoval
 471 %type   <v.icmp>                icmpspec
 472 %type   <v.icmp>                icmp_list icmp_item
 473 %type   <v.icmp>                icmp6_list icmp6_item
 474 %type   <v.number>              reticmpspec reticmp6spec
 475 %type   <v.fromto>              fromto
 476 %type   <v.peer>                ipportspec from to
 477 %type   <v.host>                ipspec toipspec xhost host dynaddr host_list
 478 %type   <v.host>                redir_host_list redirspec
 479 %type   <v.host>                route_host route_host_list routespec
 480 %type   <v.os>                  os xos os_list
 481 %type   <v.port>                portspec port_list port_item
 482 %type   <v.uid>                 uids uid_list uid_item
 483 %type   <v.gid>                 gids gid_list gid_item
 484 %type   <v.route>               route
 485 %type   <v.redirection>         redirection redirpool
 486 %type   <v.string>              label stringall tag anchorname
 487 %type   <v.string>              string varstring numberstring
 488 %type   <v.keep_state>          keep
 489 %type   <v.state_opt>           state_opt_spec state_opt_list state_opt_item
 490 %type   <v.logquick>            logquick quick log logopts logopt
 491 %type   <v.interface>           antispoof_ifspc antispoof_iflst antispoof_if
 492 %type   <v.qassign>             qname
 493 %type   <v.queue>               qassign qassign_list qassign_item
 494 %type   <v.queue_options>       scheduler
 495 %type   <v.number>              cbqflags_list cbqflags_item
 496 %type   <v.number>              priqflags_list priqflags_item
 497 %type   <v.hfsc_opts>           hfscopts_list hfscopts_item hfsc_opts
 498 %type   <v.queue_bwspec>        bandwidth
 499 %type   <v.filter_opts>         filter_opts filter_opt filter_opts_l
 500 %type   <v.antispoof_opts>      antispoof_opts antispoof_opt antispoof_opts_l
 501 %type   <v.queue_opts>          queue_opts queue_opt queue_opts_l
 502 %type   <v.scrub_opts>          scrub_opts scrub_opt scrub_opts_l
 503 %type   <v.table_opts>          table_opts table_opt table_opts_l
 504 %type   <v.pool_opts>           pool_opts pool_opt pool_opts_l
 505 %type   <v.tagged>              tagged
 506 %type   <v.rtableid>            rtable
 507 %%
 508
 509 ruleset         : /* empty */
 510                 | ruleset include '\n'
 511                 | ruleset '\n'
 512                 | ruleset option '\n'
 513                 | ruleset scrubrule '\n'
 514                 | ruleset natrule '\n'
 515                 | ruleset binatrule '\n'
 516                 | ruleset pfrule '\n'
 517                 | ruleset anchorrule '\n'
 518                 | ruleset loadrule '\n'
 519                 | ruleset altqif '\n'
 520                 | ruleset queuespec '\n'
 521                 | ruleset varset '\n'
 522                 | ruleset antispoof '\n'
 523                 | ruleset tabledef '\n'
 524                 | '{' fakeanchor '}' '\n';
 525                 | ruleset error '\n'            { file->errors++; }
 526                 ;
 527
 528 include         : INCLUDE STRING                {
 529                         struct file     *nfile;
 530
 531                         if ((nfile = pushfile($2, 0)) == NULL) {
 532                                 yyerror("failed to include file %s", $2);
 533                                 free($2);
 534                                 YYERROR;
 535                         }
 536                         free($2);
 537
 538                         file = nfile;
 539                         lungetc('\n');
 540                 }
 541                 ;
 542
 543 /*
 544  * apply to previouslys specified rule: must be careful to note
 545  * what that is: pf or nat or binat or rdr
 546  */
 547 fakeanchor      : fakeanchor '\n'
 548                 | fakeanchor anchorrule '\n'
 549                 | fakeanchor binatrule '\n'
 550                 | fakeanchor natrule '\n'
 551                 | fakeanchor pfrule '\n'
 552                 | fakeanchor error '\n'
 553                 ;
 554
 555 optimizer       : string        {
 556                         if (!strcmp($1, "none"))
 557                                 $$ = 0;
 558                         else if (!strcmp($1, "basic"))
 559                                 $$ = PF_OPTIMIZE_BASIC;
 560                         else if (!strcmp($1, "profile"))
 561                                 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
 562                         else {
 563                                 yyerror("unknown ruleset-optimization %s", $1);
 564                                 YYERROR;
 565                         }
 566                 }
 567                 ;
 568
 569 option          : SET OPTIMIZATION STRING               {
 570                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 571                                 free($3);
 572                                 YYERROR;
 573                         }
 574                         if (pfctl_set_optimization(pf, $3) != 0) {
 575                                 yyerror("unknown optimization %s", $3);
 576                                 free($3);
 577                                 YYERROR;
 578                         }
 579                         free($3);
 580                 }
 581                 | SET RULESET_OPTIMIZATION optimizer {
 582                         if (!(pf->opts & PF_OPT_OPTIMIZE)) {
 583                                 pf->opts |= PF_OPT_OPTIMIZE;
 584                                 pf->optimize = $3;
 585                         }
 586                 }
 587                 | SET TIMEOUT timeout_spec
 588                 | SET TIMEOUT '{' optnl timeout_list '}'
 589                 | SET LIMIT limit_spec
 590                 | SET LIMIT '{' optnl limit_list '}'
 591                 | SET LOGINTERFACE stringall            {
 592                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 593                                 free($3);
 594                                 YYERROR;
 595                         }
 596                         if (pfctl_set_logif(pf, $3) != 0) {
 597                                 yyerror("error setting loginterface %s", $3);
 598                                 free($3);
 599                                 YYERROR;
 600                         }
 601                         free($3);
 602                 }
 603                 | SET HOSTID number {
 604                         if ($3 == 0 || $3 > UINT_MAX) {
 605                                 yyerror("hostid must be non-zero");
 606                                 YYERROR;
 607                         }
 608                         if (pfctl_set_hostid(pf, $3) != 0) {
 609                                 yyerror("error setting hostid %08x", $3);
 610                                 YYERROR;
 611                         }
 612                 }
 613                 | SET BLOCKPOLICY DROP  {
 614                         if (pf->opts & PF_OPT_VERBOSE)
 615                                 printf("set block-policy drop\n");
 616                         if (check_rulestate(PFCTL_STATE_OPTION))
 617                                 YYERROR;
 618                         blockpolicy = PFRULE_DROP;
 619                 }
 620                 | SET BLOCKPOLICY RETURN {
 621                         if (pf->opts & PF_OPT_VERBOSE)
 622                                 printf("set block-policy return\n");
 623                         if (check_rulestate(PFCTL_STATE_OPTION))
 624                                 YYERROR;
 625                         blockpolicy = PFRULE_RETURN;
 626                 }
 627                 | SET REQUIREORDER yesno {
 628                         if (pf->opts & PF_OPT_VERBOSE)
 629                                 printf("set require-order %s\n",
 630                                     $3 == 1 ? "yes" : "no");
 631                         require_order = $3;
 632                 }
 633                 | SET FINGERPRINTS STRING {
 634                         if (pf->opts & PF_OPT_VERBOSE)
 635                                 printf("set fingerprints \"%s\"\n", $3);
 636                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 637                                 free($3);
 638                                 YYERROR;
 639                         }
 640                         if (!pf->anchor->name[0]) {
 641                                 if (pfctl_file_fingerprints(pf->dev,
 642                                     pf->opts, $3)) {
 643                                         yyerror("error loading "
 644                                             "fingerprints %s", $3);
 645                                         free($3);
 646                                         YYERROR;
 647                                 }
 648                         }
 649                         free($3);
 650                 }
 651                 | SET STATEPOLICY statelock {
 652                         if (pf->opts & PF_OPT_VERBOSE)
 653                                 switch ($3) {
 654                                 case 0:
 655                                         printf("set state-policy floating\n");
 656                                         break;
 657                                 case PFRULE_IFBOUND:
 658                                         printf("set state-policy if-bound\n");
 659                                         break;
 660                                 }
 661                         default_statelock = $3;
 662                 }
 663                 | SET DEBUG STRING {
 664                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 665                                 free($3);
 666                                 YYERROR;
 667                         }
 668                         if (pfctl_set_debug(pf, $3) != 0) {
 669                                 yyerror("error setting debuglevel %s", $3);
 670                                 free($3);
 671                                 YYERROR;
 672                         }
 673                         free($3);
 674                 }
 675                 | SET SKIP interface {
 676                         if (expand_skip_interface($3) != 0) {
 677                                 yyerror("error setting skip interface(s)");
 678                                 YYERROR;
 679                         }
 680                 }
 681                 | SET STATEDEFAULTS state_opt_list {
 682                         if (keep_state_defaults != NULL) {
 683                                 yyerror("cannot redefine state-defaults");
 684                                 YYERROR;
 685                         }
 686                         keep_state_defaults = $3;
 687                 }
 688                 ;
 689
 690 stringall       : STRING        { $$ = $1; }
 691                 | ALL           {
 692                         if (($$ = strdup("all")) == NULL) {
 693                                 err(1, "stringall: strdup");
 694                         }
 695                 }
 696                 ;
 697
 698 string          : STRING string                         {
 699                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 700                                 err(1, "string: asprintf");
 701                         free($1);
 702                         free($2);
 703                 }
 704                 | STRING
 705                 ;
 706
 707 varstring       : numberstring varstring                {
 708                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 709                                 err(1, "string: asprintf");
 710                         free($1);
 711                         free($2);
 712                 }
 713                 | numberstring
 714                 ;
 715
 716 numberstring    : NUMBER                                {
 717                         char    *s;
 718                         if (asprintf(&s, "%lld", (long long)$1) == -1) {
 719                                 yyerror("string: asprintf");
 720                                 YYERROR;
 721                         }
 722                         $$ = s;
 723                 }
 724                 | STRING
 725                 ;
 726
 727 varset          : STRING '=' varstring  {
 728                         if (pf->opts & PF_OPT_VERBOSE)
 729                                 printf("%s = \"%s\"\n", $1, $3);
 730                         if (symset($1, $3, 0) == -1)
 731                                 err(1, "cannot store variable %s", $1);
 732                         free($1);
 733                         free($3);
 734                 }
 735                 ;
 736
 737 anchorname      : STRING                        { $$ = $1; }
 738                 | /* empty */                   { $$ = NULL; }
 739                 ;
 740
 741 pfa_anchorlist  : /* empty */
 742                 | pfa_anchorlist '\n'
 743                 | pfa_anchorlist pfrule '\n'
 744                 | pfa_anchorlist anchorrule '\n'
 745                 ;
 746
 747 pfa_anchor      : '{'
 748                 {
 749                         char ta[PF_ANCHOR_NAME_SIZE];
 750                         struct pf_ruleset *rs;
 751
 752                         /* steping into a brace anchor */
 753                         pf->asd++;
 754                         pf->bn++;
 755                         pf->brace = 1;
 756
 757                         /* create a holding ruleset in the root */
 758                         snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
 759                         rs = pf_find_or_create_ruleset(ta);
 760                         if (rs == NULL)
 761                                 err(1, "pfa_anchor: pf_find_or_create_ruleset");
 762                         pf->astack[pf->asd] = rs->anchor;
 763                         pf->anchor = rs->anchor;
 764                 } '\n' pfa_anchorlist '}'
 765                 {
 766                         pf->alast = pf->anchor;
 767                         pf->asd--;
 768                         pf->anchor = pf->astack[pf->asd];
 769                 }
 770                 | /* empty */
 771                 ;
 772
 773 anchorrule      : ANCHOR anchorname dir quick interface af proto fromto
 774                     filter_opts pfa_anchor
 775                 {
 776                         struct pf_rule  r;
 777                         struct node_proto       *proto;
 778
 779                         if (check_rulestate(PFCTL_STATE_FILTER)) {
 780                                 if ($2)
 781                                         free($2);
 782                                 YYERROR;
 783                         }
 784
 785                         if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
 786                                 free($2);
 787                                 yyerror("anchor names beginning with '_' "
 788                                     "are reserved for internal use");
 789                                 YYERROR;
 790                         }
 791
 792                         memset(&r, 0, sizeof(r));
 793                         if (pf->astack[pf->asd + 1]) {
 794                                 /* move inline rules into relative location */
 795                                 pf_anchor_setup(&r,
 796                                     &pf->astack[pf->asd]->ruleset,
 797                                     $2 ? $2 : pf->alast->name);
 798
 799                                 if (r.anchor == NULL)
 800                                         err(1, "anchorrule: unable to "
 801                                             "create ruleset");
 802
 803                                 if (pf->alast != r.anchor) {
 804                                         if (r.anchor->match) {
 805                                                 yyerror("inline anchor '%s' "
 806                                                     "already exists",
 807                                                     r.anchor->name);
 808                                                 YYERROR;
 809                                         }
 810                                         mv_rules(&pf->alast->ruleset,
 811                                             &r.anchor->ruleset);
 812                                 }
 813                                 pf_remove_if_empty_ruleset(&pf->alast->ruleset);
 814                                 pf->alast = r.anchor;
 815                         } else {
 816                                 if (!$2) {
 817                                         yyerror("anchors without explicit "
 818                                             "rules must specify a name");
 819                                         YYERROR;
 820                                 }
 821                         }
 822                         r.direction = $3;
 823                         r.quick = $4.quick;
 824                         r.af = $6;
 825                         r.prob = $9.prob;
 826                         r.rtableid = $9.rtableid;
 827
 828                         if ($9.tag)
 829                                 if (strlcpy(r.tagname, $9.tag,
 830                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 831                                         yyerror("tag too long, max %u chars",
 832                                             PF_TAG_NAME_SIZE - 1);
 833                                         YYERROR;
 834                                 }
 835                         if ($9.match_tag)
 836                                 if (strlcpy(r.match_tagname, $9.match_tag,
 837                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 838                                         yyerror("tag too long, max %u chars",
 839                                             PF_TAG_NAME_SIZE - 1);
 840                                         YYERROR;
 841                                 }
 842                         r.match_tag_not = $9.match_tag_not;
 843                         if (rule_label(&r, $9.label))
 844                                 YYERROR;
 845                         free($9.label);
 846                         r.flags = $9.flags.b1;
 847                         r.flagset = $9.flags.b2;
 848                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
 849                                 yyerror("flags always false");
 850                                 YYERROR;
 851                         }
 852                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
 853                                 for (proto = $7; proto != NULL &&
 854                                     proto->proto != IPPROTO_TCP;
 855                                     proto = proto->next)
 856                                         ;       /* nothing */
 857                                 if (proto == NULL && $7 != NULL) {
 858                                         if ($9.flags.b1 || $9.flags.b2)
 859                                                 yyerror(
 860                                                     "flags only apply to tcp");
 861                                         if ($8.src_os)
 862                                                 yyerror(
 863                                                     "OS fingerprinting only "
 864                                                     "applies to tcp");
 865                                         YYERROR;
 866                                 }
 867                         }
 868
 869                         r.tos = $9.tos;
 870
 871                         if ($9.keep.action) {
 872                                 yyerror("cannot specify state handling "
 873                                     "on anchors");
 874                                 YYERROR;
 875                         }
 876
 877                         if ($9.match_tag)
 878                                 if (strlcpy(r.match_tagname, $9.match_tag,
 879                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 880                                         yyerror("tag too long, max %u chars",
 881                                             PF_TAG_NAME_SIZE - 1);
 882                                         YYERROR;
 883                                 }
 884                         r.match_tag_not = $9.match_tag_not;
 885
 886                         decide_address_family($8.src.host, &r.af);
 887                         decide_address_family($8.dst.host, &r.af);
 888
 889                         expand_rule(&r, $5, NULL, $7, $8.src_os,
 890                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
 891                             $9.uid, $9.gid, $9.icmpspec,
 892                             pf->astack[pf->asd + 1] ? pf->alast->name : $2);
 893                         free($2);
 894                         pf->astack[pf->asd + 1] = NULL;
 895                 }
 896                 | NATANCHOR string interface af proto fromto rtable {
 897                         struct pf_rule  r;
 898
 899                         if (check_rulestate(PFCTL_STATE_NAT)) {
 900                                 free($2);
 901                                 YYERROR;
 902                         }
 903
 904                         memset(&r, 0, sizeof(r));
 905                         r.action = PF_NAT;
 906                         r.af = $4;
 907                         r.rtableid = $7;
 908
 909                         decide_address_family($6.src.host, &r.af);
 910                         decide_address_family($6.dst.host, &r.af);
 911
 912                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 913                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 914                             0, 0, 0, $2);
 915                         free($2);
 916                 }
 917                 | RDRANCHOR string interface af proto fromto rtable {
 918                         struct pf_rule  r;
 919
 920                         if (check_rulestate(PFCTL_STATE_NAT)) {
 921                                 free($2);
 922                                 YYERROR;
 923                         }
 924
 925                         memset(&r, 0, sizeof(r));
 926                         r.action = PF_RDR;
 927                         r.af = $4;
 928                         r.rtableid = $7;
 929
 930                         decide_address_family($6.src.host, &r.af);
 931                         decide_address_family($6.dst.host, &r.af);
 932
 933                         if ($6.src.port != NULL) {
 934                                 yyerror("source port parameter not supported"
 935                                     " in rdr-anchor");
 936                                 YYERROR;
 937                         }
 938                         if ($6.dst.port != NULL) {
 939                                 if ($6.dst.port->next != NULL) {
 940                                         yyerror("destination port list "
 941                                             "expansion not supported in "
 942                                             "rdr-anchor");
 943                                         YYERROR;
 944                                 } else if ($6.dst.port->op != PF_OP_EQ) {
 945                                         yyerror("destination port operators"
 946                                             " not supported in rdr-anchor");
 947                                         YYERROR;
 948                                 }
 949                                 r.dst.port[0] = $6.dst.port->port[0];
 950                                 r.dst.port[1] = $6.dst.port->port[1];
 951                                 r.dst.port_op = $6.dst.port->op;
 952                         }
 953
 954                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 955                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 956                             0, 0, 0, $2);
 957                         free($2);
 958                 }
 959                 | BINATANCHOR string interface af proto fromto rtable {
 960                         struct pf_rule  r;
 961
 962                         if (check_rulestate(PFCTL_STATE_NAT)) {
 963                                 free($2);
 964                                 YYERROR;
 965                         }
 966
 967                         memset(&r, 0, sizeof(r));
 968                         r.action = PF_BINAT;
 969                         r.af = $4;
 970                         r.rtableid = $7;
 971                         if ($5 != NULL) {
 972                                 if ($5->next != NULL) {
 973                                         yyerror("proto list expansion"
 974                                             " not supported in binat-anchor");
 975                                         YYERROR;
 976                                 }
 977                                 r.proto = $5->proto;
 978                                 free($5);
 979                         }
 980
 981                         if ($6.src.host != NULL || $6.src.port != NULL ||
 982                             $6.dst.host != NULL || $6.dst.port != NULL) {
 983                                 yyerror("fromto parameter not supported"
 984                                     " in binat-anchor");
 985                                 YYERROR;
 986                         }
 987
 988                         decide_address_family($6.src.host, &r.af);
 989                         decide_address_family($6.dst.host, &r.af);
 990
 991                         pfctl_add_rule(pf, &r, $2);
 992                         free($2);
 993                 }
 994                 ;
 995
 996 loadrule        : LOAD ANCHOR string FROM string        {
 997                         struct loadanchors      *loadanchor;
 998
 999                         if (strlen(pf->anchor->name) + 1 +
1000                             strlen($3) >= MAXPATHLEN) {
1001                                 yyerror("anchorname %s too long, max %u\n",
1002                                     $3, MAXPATHLEN - 1);
1003                                 free($3);
1004                                 YYERROR;
1005                         }
1006                         loadanchor = calloc(1, sizeof(struct loadanchors));
1007                         if (loadanchor == NULL)
1008                                 err(1, "loadrule: calloc");
1009                         if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1010                             NULL)
1011                                 err(1, "loadrule: malloc");
1012                         if (pf->anchor->name[0])
1013                                 snprintf(loadanchor->anchorname, MAXPATHLEN,
1014                                     "%s/%s", pf->anchor->name, $3);
1015                         else
1016                                 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1017                         if ((loadanchor->filename = strdup($5)) == NULL)
1018                                 err(1, "loadrule: strdup");
1019
1020                         TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1021                             entries);
1022
1023                         free($3);
1024                         free($5);
1025                 };
1026
1027 scrubaction     : no SCRUB {
1028                         $$.b2 = $$.w = 0;
1029                         if ($1)
1030                                 $$.b1 = PF_NOSCRUB;
1031                         else
1032                                 $$.b1 = PF_SCRUB;
1033                 }
1034                 ;
1035
1036 scrubrule       : scrubaction dir logquick interface af proto fromto scrub_opts
1037                 {
1038                         struct pf_rule  r;
1039
1040                         if (check_rulestate(PFCTL_STATE_SCRUB))
1041                                 YYERROR;
1042
1043                         memset(&r, 0, sizeof(r));
1044
1045                         r.action = $1.b1;
1046                         r.direction = $2;
1047
1048                         r.log = $3.log;
1049                         r.logif = $3.logif;
1050                         if ($3.quick) {
1051                                 yyerror("scrub rules do not support 'quick'");
1052                                 YYERROR;
1053                         }
1054
1055                         r.af = $5;
1056                         if ($8.nodf)
1057                                 r.rule_flag |= PFRULE_NODF;
1058                         if ($8.randomid)
1059                                 r.rule_flag |= PFRULE_RANDOMID;
1060                         if ($8.reassemble_tcp) {
1061                                 if (r.direction != PF_INOUT) {
1062                                         yyerror("reassemble tcp rules can not "
1063                                             "specify direction");
1064                                         YYERROR;
1065                                 }
1066                                 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1067                         }
1068                         if ($8.minttl)
1069                                 r.min_ttl = $8.minttl;
1070                         if ($8.maxmss)
1071                                 r.max_mss = $8.maxmss;
1072                         if ($8.marker & SOM_SETTOS) {
1073                                 r.rule_flag |= PFRULE_SET_TOS;
1074                                 r.set_tos = $8.settos;
1075                         }
1076                         if ($8.fragcache)
1077                                 r.rule_flag |= $8.fragcache;
1078                         if ($8.match_tag)
1079                                 if (strlcpy(r.match_tagname, $8.match_tag,
1080                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1081                                         yyerror("tag too long, max %u chars",
1082                                             PF_TAG_NAME_SIZE - 1);
1083                                         YYERROR;
1084                                 }
1085                         r.match_tag_not = $8.match_tag_not;
1086                         r.rtableid = $8.rtableid;
1087
1088                         expand_rule(&r, $4, NULL, $6, $7.src_os,
1089                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
1090                             NULL, NULL, NULL, "");
1091                 }
1092                 ;
1093
1094 scrub_opts      :       {
1095                                 bzero(&scrub_opts, sizeof scrub_opts);
1096                                 scrub_opts.rtableid = -1;
1097                         }
1098                     scrub_opts_l
1099                         { $$ = scrub_opts; }
1100                 | /* empty */ {
1101                         bzero(&scrub_opts, sizeof scrub_opts);
1102                         scrub_opts.rtableid = -1;
1103                         $$ = scrub_opts;
1104                 }
1105                 ;
1106
1107 scrub_opts_l    : scrub_opts_l scrub_opt
1108                 | scrub_opt
1109                 ;
1110
1111 scrub_opt       : NODF  {
1112                         if (scrub_opts.nodf) {
1113                                 yyerror("no-df cannot be respecified");
1114                                 YYERROR;
1115                         }
1116                         scrub_opts.nodf = 1;
1117                 }
1118                 | MINTTL NUMBER {
1119                         if (scrub_opts.marker & SOM_MINTTL) {
1120                                 yyerror("min-ttl cannot be respecified");
1121                                 YYERROR;
1122                         }
1123                         if ($2 < 0 || $2 > 255) {
1124                                 yyerror("illegal min-ttl value %d", $2);
1125                                 YYERROR;
1126                         }
1127                         scrub_opts.marker |= SOM_MINTTL;
1128                         scrub_opts.minttl = $2;
1129                 }
1130                 | MAXMSS NUMBER {
1131                         if (scrub_opts.marker & SOM_MAXMSS) {
1132                                 yyerror("max-mss cannot be respecified");
1133                                 YYERROR;
1134                         }
1135                         if ($2 < 0 || $2 > 65535) {
1136                                 yyerror("illegal max-mss value %d", $2);
1137                                 YYERROR;
1138                         }
1139                         scrub_opts.marker |= SOM_MAXMSS;
1140                         scrub_opts.maxmss = $2;
1141                 }
1142                 | SETTOS tos {
1143                         if (scrub_opts.marker & SOM_SETTOS) {
1144                                 yyerror("set-tos cannot be respecified");
1145                                 YYERROR;
1146                         }
1147                         scrub_opts.marker |= SOM_SETTOS;
1148                         scrub_opts.settos = $2;
1149                 }
1150                 | fragcache {
1151                         if (scrub_opts.marker & SOM_FRAGCACHE) {
1152                                 yyerror("fragcache cannot be respecified");
1153                                 YYERROR;
1154                         }
1155                         scrub_opts.marker |= SOM_FRAGCACHE;
1156                         scrub_opts.fragcache = $1;
1157                 }
1158                 | REASSEMBLE STRING {
1159                         if (strcasecmp($2, "tcp") != 0) {
1160                                 yyerror("scrub reassemble supports only tcp, "
1161                                     "not '%s'", $2);
1162                                 free($2);
1163                                 YYERROR;
1164                         }
1165                         free($2);
1166                         if (scrub_opts.reassemble_tcp) {
1167                                 yyerror("reassemble tcp cannot be respecified");
1168                                 YYERROR;
1169                         }
1170                         scrub_opts.reassemble_tcp = 1;
1171                 }
1172                 | RANDOMID {
1173                         if (scrub_opts.randomid) {
1174                                 yyerror("random-id cannot be respecified");
1175                                 YYERROR;
1176                         }
1177                         scrub_opts.randomid = 1;
1178                 }
1179                 | RTABLE NUMBER                         {
1180                         if ($2 < 0 || $2 > rt_tableid_max()) {
1181                                 yyerror("invalid rtable id");
1182                                 YYERROR;
1183                         }
1184                         scrub_opts.rtableid = $2;
1185                 }
1186                 | not TAGGED string                     {
1187                         scrub_opts.match_tag = $3;
1188                         scrub_opts.match_tag_not = $1;
1189                 }
1190                 ;
1191
1192 fragcache       : FRAGMENT REASSEMBLE   { $$ = 0; /* default */ }
1193                 | FRAGMENT FRAGCROP     { $$ = PFRULE_FRAGCROP; }
1194                 | FRAGMENT FRAGDROP     { $$ = PFRULE_FRAGDROP; }
1195                 ;
1196
1197 antispoof       : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1198                         struct pf_rule           r;
1199                         struct node_host        *h = NULL, *hh;
1200                         struct node_if          *i, *j;
1201
1202                         if (check_rulestate(PFCTL_STATE_FILTER))
1203                                 YYERROR;
1204
1205                         for (i = $3; i; i = i->next) {
1206                                 bzero(&r, sizeof(r));
1207
1208                                 r.action = PF_DROP;
1209                                 r.direction = PF_IN;
1210                                 r.log = $2.log;
1211                                 r.logif = $2.logif;
1212                                 r.quick = $2.quick;
1213                                 r.af = $4;
1214                                 if (rule_label(&r, $5.label))
1215                                         YYERROR;
1216                                 r.rtableid = $5.rtableid;
1217                                 j = calloc(1, sizeof(struct node_if));
1218                                 if (j == NULL)
1219                                         err(1, "antispoof: calloc");
1220                                 if (strlcpy(j->ifname, i->ifname,
1221                                     sizeof(j->ifname)) >= sizeof(j->ifname)) {
1222                                         free(j);
1223                                         yyerror("interface name too long");
1224                                         YYERROR;
1225                                 }
1226                                 j->not = 1;
1227                                 if (i->dynamic) {
1228                                         h = calloc(1, sizeof(*h));
1229                                         if (h == NULL)
1230                                                 err(1, "address: calloc");
1231                                         h->addr.type = PF_ADDR_DYNIFTL;
1232                                         set_ipmask(h, 128);
1233                                         if (strlcpy(h->addr.v.ifname, i->ifname,
1234                                             sizeof(h->addr.v.ifname)) >=
1235                                             sizeof(h->addr.v.ifname)) {
1236                                                 free(h);
1237                                                 yyerror(
1238                                                     "interface name too long");
1239                                                 YYERROR;
1240                                         }
1241                                         hh = malloc(sizeof(*hh));
1242                                         if (hh == NULL)
1243                                                  err(1, "address: malloc");
1244                                         bcopy(h, hh, sizeof(*hh));
1245                                         h->addr.iflags = PFI_AFLAG_NETWORK;
1246                                 } else {
1247                                         h = ifa_lookup(j->ifname,
1248                                             PFI_AFLAG_NETWORK);
1249                                         hh = NULL;
1250                                 }
1251
1252                                 if (h != NULL)
1253                                         expand_rule(&r, j, NULL, NULL, NULL, h,
1254                                             NULL, NULL, NULL, NULL, NULL,
1255                                             NULL, "");
1256
1257                                 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1258                                         bzero(&r, sizeof(r));
1259
1260                                         r.action = PF_DROP;
1261                                         r.direction = PF_IN;
1262                                         r.log = $2.log;
1263                                         r.logif = $2.logif;
1264                                         r.quick = $2.quick;
1265                                         r.af = $4;
1266                                         if (rule_label(&r, $5.label))
1267                                                 YYERROR;
1268                                         r.rtableid = $5.rtableid;
1269                                         if (hh != NULL)
1270                                                 h = hh;
1271                                         else
1272                                                 h = ifa_lookup(i->ifname, 0);
1273                                         if (h != NULL)
1274                                                 expand_rule(&r, NULL, NULL,
1275                                                     NULL, NULL, h, NULL, NULL,
1276                                                     NULL, NULL, NULL, NULL, "");
1277                                 } else
1278                                         free(hh);
1279                         }
1280                         free($5.label);
1281                 }
1282                 ;
1283
1284 antispoof_ifspc : FOR antispoof_if                      { $$ = $2; }
1285                 | FOR '{' optnl antispoof_iflst '}'     { $$ = $4; }
1286                 ;
1287
1288 antispoof_iflst : antispoof_if optnl                    { $$ = $1; }
1289                 | antispoof_iflst comma antispoof_if optnl {
1290                         $1->tail->next = $3;
1291                         $1->tail = $3;
1292                         $$ = $1;
1293                 }
1294                 ;
1295
1296 antispoof_if    : if_item                               { $$ = $1; }
1297                 | '(' if_item ')'                       {
1298                         $2->dynamic = 1;
1299                         $$ = $2;
1300                 }
1301                 ;
1302
1303 antispoof_opts  :       {
1304                                 bzero(&antispoof_opts, sizeof antispoof_opts);
1305                                 antispoof_opts.rtableid = -1;
1306                         }
1307                     antispoof_opts_l
1308                         { $$ = antispoof_opts; }
1309                 | /* empty */   {
1310                         bzero(&antispoof_opts, sizeof antispoof_opts);
1311                         antispoof_opts.rtableid = -1;
1312                         $$ = antispoof_opts;
1313                 }
1314                 ;
1315
1316 antispoof_opts_l        : antispoof_opts_l antispoof_opt
1317                         | antispoof_opt
1318                         ;
1319
1320 antispoof_opt   : label {
1321                         if (antispoof_opts.label) {
1322                                 yyerror("label cannot be redefined");
1323                                 YYERROR;
1324                         }
1325                         antispoof_opts.label = $1;
1326                 }
1327                 | RTABLE NUMBER                         {
1328                         if ($2 < 0 || $2 > rt_tableid_max()) {
1329                                 yyerror("invalid rtable id");
1330                                 YYERROR;
1331                         }
1332                         antispoof_opts.rtableid = $2;
1333                 }
1334                 ;
1335
1336 not             : '!'           { $$ = 1; }
1337                 | /* empty */   { $$ = 0; }
1338                 ;
1339
1340 tabledef        : TABLE '<' STRING '>' table_opts {
1341                         struct node_host         *h, *nh;
1342                         struct node_tinit        *ti, *nti;
1343
1344                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1345                                 yyerror("table name too long, max %d chars",
1346                                     PF_TABLE_NAME_SIZE - 1);
1347                                 free($3);
1348                                 YYERROR;
1349                         }
1350                         if (pf->loadopt & PFCTL_FLAG_TABLE)
1351                                 if (process_tabledef($3, &$5)) {
1352                                         free($3);
1353                                         YYERROR;
1354                                 }
1355                         free($3);
1356                         for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1357                             ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1358                                 if (ti->file)
1359                                         free(ti->file);
1360                                 for (h = ti->host; h != NULL; h = nh) {
1361                                         nh = h->next;
1362                                         free(h);
1363                                 }
1364                                 nti = SIMPLEQ_NEXT(ti, entries);
1365                                 free(ti);
1366                         }
1367                 }
1368                 ;
1369
1370 table_opts      :       {
1371                         bzero(&table_opts, sizeof table_opts);
1372                         SIMPLEQ_INIT(&table_opts.init_nodes);
1373                 }
1374                     table_opts_l
1375                         { $$ = table_opts; }
1376                 | /* empty */
1377                         {
1378                         bzero(&table_opts, sizeof table_opts);
1379                         SIMPLEQ_INIT(&table_opts.init_nodes);
1380                         $$ = table_opts;
1381                 }
1382                 ;
1383
1384 table_opts_l    : table_opts_l table_opt
1385                 | table_opt
1386                 ;
1387
1388 table_opt       : STRING                {
1389                         if (!strcmp($1, "const"))
1390                                 table_opts.flags |= PFR_TFLAG_CONST;
1391                         else if (!strcmp($1, "persist"))
1392                                 table_opts.flags |= PFR_TFLAG_PERSIST;
1393                         else if (!strcmp($1, "counters"))
1394                                 table_opts.flags |= PFR_TFLAG_COUNTERS;
1395                         else {
1396                                 yyerror("invalid table option '%s'", $1);
1397                                 free($1);
1398                                 YYERROR;
1399                         }
1400                         free($1);
1401                 }
1402                 | '{' optnl '}'         { table_opts.init_addr = 1; }
1403                 | '{' optnl host_list '}'       {
1404                         struct node_host        *n;
1405                         struct node_tinit       *ti;
1406
1407                         for (n = $3; n != NULL; n = n->next) {
1408                                 switch (n->addr.type) {
1409                                 case PF_ADDR_ADDRMASK:
1410                                         continue; /* ok */
1411                                 case PF_ADDR_RANGE:
1412                                         yyerror("address ranges are not "
1413                                             "permitted inside tables");
1414                                         break;
1415                                 case PF_ADDR_DYNIFTL:
1416                                         yyerror("dynamic addresses are not "
1417                                             "permitted inside tables");
1418                                         break;
1419                                 case PF_ADDR_TABLE:
1420                                         yyerror("tables cannot contain tables");
1421                                         break;
1422                                 case PF_ADDR_NOROUTE:
1423                                         yyerror("\"no-route\" is not permitted "
1424                                             "inside tables");
1425                                         break;
1426                                 case PF_ADDR_URPFFAILED:
1427                                         yyerror("\"urpf-failed\" is not "
1428                                             "permitted inside tables");
1429                                         break;
1430                                 default:
1431                                         yyerror("unknown address type %d",
1432                                             n->addr.type);
1433                                 }
1434                                 YYERROR;
1435                         }
1436                         if (!(ti = calloc(1, sizeof(*ti))))
1437                                 err(1, "table_opt: calloc");
1438                         ti->host = $3;
1439                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1440                             entries);
1441                         table_opts.init_addr = 1;
1442                 }
1443                 | FILENAME STRING       {
1444                         struct node_tinit       *ti;
1445
1446                         if (!(ti = calloc(1, sizeof(*ti))))
1447                                 err(1, "table_opt: calloc");
1448                         ti->file = $2;
1449                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1450                             entries);
1451                         table_opts.init_addr = 1;
1452                 }
1453                 ;
1454
1455 altqif          : ALTQ interface queue_opts QUEUE qassign {
1456                         struct pf_altq  a;
1457
1458                         if (check_rulestate(PFCTL_STATE_QUEUE))
1459                                 YYERROR;
1460
1461                         memset(&a, 0, sizeof(a));
1462                         if ($3.scheduler.qtype == ALTQT_NONE) {
1463                                 yyerror("no scheduler specified!");
1464                                 YYERROR;
1465                         }
1466                         a.scheduler = $3.scheduler.qtype;
1467                         a.qlimit = $3.qlimit;
1468                         a.tbrsize = $3.tbrsize;
1469                         if ($5 == NULL) {
1470                                 yyerror("no child queues specified");
1471                                 YYERROR;
1472                         }
1473                         if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1474                             &$3.scheduler))
1475                                 YYERROR;
1476                 }
1477                 ;
1478
1479 queuespec       : QUEUE STRING interface queue_opts qassign {
1480                         struct pf_altq  a;
1481
1482                         if (check_rulestate(PFCTL_STATE_QUEUE)) {
1483                                 free($2);
1484                                 YYERROR;
1485                         }
1486
1487                         memset(&a, 0, sizeof(a));
1488
1489                         if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1490                             sizeof(a.qname)) {
1491                                 yyerror("queue name too long (max "
1492                                     "%d chars)", PF_QNAME_SIZE-1);
1493                                 free($2);
1494                                 YYERROR;
1495                         }
1496                         free($2);
1497                         if ($4.tbrsize) {
1498                                 yyerror("cannot specify tbrsize for queue");
1499                                 YYERROR;
1500                         }
1501                         if ($4.priority > 255) {
1502                                 yyerror("priority out of range: max 255");
1503                                 YYERROR;
1504                         }
1505                         a.priority = $4.priority;
1506                         a.qlimit = $4.qlimit;
1507                         a.scheduler = $4.scheduler.qtype;
1508                         if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1509                             &$4.scheduler)) {
1510                                 yyerror("errors in queue definition");
1511                                 YYERROR;
1512                         }
1513                 }
1514                 ;
1515
1516 queue_opts      :       {
1517                         bzero(&queue_opts, sizeof queue_opts);
1518                         queue_opts.priority = DEFAULT_PRIORITY;
1519                         queue_opts.qlimit = DEFAULT_QLIMIT;
1520                         queue_opts.scheduler.qtype = ALTQT_NONE;
1521                         queue_opts.queue_bwspec.bw_percent = 100;
1522                 }
1523                     queue_opts_l
1524                         { $$ = queue_opts; }
1525                 | /* empty */ {
1526                         bzero(&queue_opts, sizeof queue_opts);
1527                         queue_opts.priority = DEFAULT_PRIORITY;
1528                         queue_opts.qlimit = DEFAULT_QLIMIT;
1529                         queue_opts.scheduler.qtype = ALTQT_NONE;
1530                         queue_opts.queue_bwspec.bw_percent = 100;
1531                         $$ = queue_opts;
1532                 }
1533                 ;
1534
1535 queue_opts_l    : queue_opts_l queue_opt
1536                 | queue_opt
1537                 ;
1538
1539 queue_opt       : BANDWIDTH bandwidth   {
1540                         if (queue_opts.marker & QOM_BWSPEC) {
1541                                 yyerror("bandwidth cannot be respecified");
1542                                 YYERROR;
1543                         }
1544                         queue_opts.marker |= QOM_BWSPEC;
1545                         queue_opts.queue_bwspec = $2;
1546                 }
1547                 | PRIORITY NUMBER       {
1548                         if (queue_opts.marker & QOM_PRIORITY) {
1549                                 yyerror("priority cannot be respecified");
1550                                 YYERROR;
1551                         }
1552                         if ($2 < 0 || $2 > 255) {
1553                                 yyerror("priority out of range: max 255");
1554                                 YYERROR;
1555                         }
1556                         queue_opts.marker |= QOM_PRIORITY;
1557                         queue_opts.priority = $2;
1558                 }
1559                 | QLIMIT NUMBER {
1560                         if (queue_opts.marker & QOM_QLIMIT) {
1561                                 yyerror("qlimit cannot be respecified");
1562                                 YYERROR;
1563                         }
1564                         if ($2 < 0 || $2 > 65535) {
1565                                 yyerror("qlimit out of range: max 65535");
1566                                 YYERROR;
1567                         }
1568                         queue_opts.marker |= QOM_QLIMIT;
1569                         queue_opts.qlimit = $2;
1570                 }
1571                 | scheduler     {
1572                         if (queue_opts.marker & QOM_SCHEDULER) {
1573                                 yyerror("scheduler cannot be respecified");
1574                                 YYERROR;
1575                         }
1576                         queue_opts.marker |= QOM_SCHEDULER;
1577                         queue_opts.scheduler = $1;
1578                 }
1579                 | TBRSIZE NUMBER        {
1580                         if (queue_opts.marker & QOM_TBRSIZE) {
1581                                 yyerror("tbrsize cannot be respecified");
1582                                 YYERROR;
1583                         }
1584                         if ($2 < 0 || $2 > 65535) {
1585                                 yyerror("tbrsize too big: max 65535");
1586                                 YYERROR;
1587                         }
1588                         queue_opts.marker |= QOM_TBRSIZE;
1589                         queue_opts.tbrsize = $2;
1590                 }
1591                 ;
1592
1593 bandwidth       : STRING {
1594                         double   bps;
1595                         char    *cp;
1596
1597                         $$.bw_percent = 0;
1598
1599                         bps = strtod($1, &cp);
1600                         if (cp != NULL) {
1601                                 if (!strcmp(cp, "b"))
1602                                         ; /* nothing */
1603                                 else if (!strcmp(cp, "Kb"))
1604                                         bps *= 1000;
1605                                 else if (!strcmp(cp, "Mb"))
1606                                         bps *= 1000 * 1000;
1607                                 else if (!strcmp(cp, "Gb"))
1608                                         bps *= 1000 * 1000 * 1000;
1609                                 else if (!strcmp(cp, "%")) {
1610                                         if (bps < 0 || bps > 100) {
1611                                                 yyerror("bandwidth spec "
1612                                                     "out of range");
1613                                                 free($1);
1614                                                 YYERROR;
1615                                         }
1616                                         $$.bw_percent = bps;
1617                                         bps = 0;
1618                                 } else {
1619                                         yyerror("unknown unit %s", cp);
1620                                         free($1);
1621                                         YYERROR;
1622                                 }
1623                         }
1624                         free($1);
1625                         $$.bw_absolute = (u_int32_t)bps;
1626                 }
1627                 | NUMBER {
1628                         if ($1 < 0 || $1 > UINT_MAX) {
1629                                 yyerror("bandwidth number too big");
1630                                 YYERROR;
1631                         }
1632                         $$.bw_percent = 0;
1633                         $$.bw_absolute = $1;
1634                 }
1635                 ;
1636
1637 scheduler       : CBQ                           {
1638                         $$.qtype = ALTQT_CBQ;
1639                         $$.data.cbq_opts.flags = 0;
1640                 }
1641                 | CBQ '(' cbqflags_list ')'     {
1642                         $$.qtype = ALTQT_CBQ;
1643                         $$.data.cbq_opts.flags = $3;
1644                 }
1645                 | PRIQ                          {
1646                         $$.qtype = ALTQT_PRIQ;
1647                         $$.data.priq_opts.flags = 0;
1648                 }
1649                 | PRIQ '(' priqflags_list ')'   {
1650                         $$.qtype = ALTQT_PRIQ;
1651                         $$.data.priq_opts.flags = $3;
1652                 }
1653                 | HFSC                          {
1654                         $$.qtype = ALTQT_HFSC;
1655                         bzero(&$$.data.hfsc_opts,
1656                             sizeof(struct node_hfsc_opts));
1657                 }
1658                 | HFSC '(' hfsc_opts ')'        {
1659                         $$.qtype = ALTQT_HFSC;
1660                         $$.data.hfsc_opts = $3;
1661                 }
1662                 ;
1663
1664 cbqflags_list   : cbqflags_item                         { $$ |= $1; }
1665                 | cbqflags_list comma cbqflags_item     { $$ |= $3; }
1666                 ;
1667
1668 cbqflags_item   : STRING        {
1669                         if (!strcmp($1, "default"))
1670                                 $$ = CBQCLF_DEFCLASS;
1671                         else if (!strcmp($1, "borrow"))
1672                                 $$ = CBQCLF_BORROW;
1673                         else if (!strcmp($1, "red"))
1674                                 $$ = CBQCLF_RED;
1675                         else if (!strcmp($1, "ecn"))
1676                                 $$ = CBQCLF_RED|CBQCLF_ECN;
1677                         else if (!strcmp($1, "rio"))
1678                                 $$ = CBQCLF_RIO;
1679                         else {
1680                                 yyerror("unknown cbq flag \"%s\"", $1);
1681                                 free($1);
1682                                 YYERROR;
1683                         }
1684                         free($1);
1685                 }
1686                 ;
1687
1688 priqflags_list  : priqflags_item                        { $$ |= $1; }
1689                 | priqflags_list comma priqflags_item   { $$ |= $3; }
1690                 ;
1691
1692 priqflags_item  : STRING        {
1693                         if (!strcmp($1, "default"))
1694                                 $$ = PRCF_DEFAULTCLASS;
1695                         else if (!strcmp($1, "red"))
1696                                 $$ = PRCF_RED;
1697                         else if (!strcmp($1, "ecn"))
1698                                 $$ = PRCF_RED|PRCF_ECN;
1699                         else if (!strcmp($1, "rio"))
1700                                 $$ = PRCF_RIO;
1701                         else {
1702                                 yyerror("unknown priq flag \"%s\"", $1);
1703                                 free($1);
1704                                 YYERROR;
1705                         }
1706                         free($1);
1707                 }
1708                 ;
1709
1710 hfsc_opts       :       {
1711                                 bzero(&hfsc_opts,
1712                                     sizeof(struct node_hfsc_opts));
1713                         }
1714                     hfscopts_list                               {
1715                         $$ = hfsc_opts;
1716                 }
1717                 ;
1718
1719 hfscopts_list   : hfscopts_item
1720                 | hfscopts_list comma hfscopts_item
1721                 ;
1722
1723 hfscopts_item   : LINKSHARE bandwidth                           {
1724                         if (hfsc_opts.linkshare.used) {
1725                                 yyerror("linkshare already specified");
1726                                 YYERROR;
1727                         }
1728                         hfsc_opts.linkshare.m2 = $2;
1729                         hfsc_opts.linkshare.used = 1;
1730                 }
1731                 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1732                     {
1733                         if ($5 < 0 || $5 > INT_MAX) {
1734                                 yyerror("timing in curve out of range");
1735                                 YYERROR;
1736                         }
1737                         if (hfsc_opts.linkshare.used) {
1738                                 yyerror("linkshare already specified");
1739                                 YYERROR;
1740                         }
1741                         hfsc_opts.linkshare.m1 = $3;
1742                         hfsc_opts.linkshare.d = $5;
1743                         hfsc_opts.linkshare.m2 = $7;
1744                         hfsc_opts.linkshare.used = 1;
1745                 }
1746                 | REALTIME bandwidth                            {
1747                         if (hfsc_opts.realtime.used) {
1748                                 yyerror("realtime already specified");
1749                                 YYERROR;
1750                         }
1751                         hfsc_opts.realtime.m2 = $2;
1752                         hfsc_opts.realtime.used = 1;
1753                 }
1754                 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1755                     {
1756                         if ($5 < 0 || $5 > INT_MAX) {
1757                                 yyerror("timing in curve out of range");
1758                                 YYERROR;
1759                         }
1760                         if (hfsc_opts.realtime.used) {
1761                                 yyerror("realtime already specified");
1762                                 YYERROR;
1763                         }
1764                         hfsc_opts.realtime.m1 = $3;
1765                         hfsc_opts.realtime.d = $5;
1766                         hfsc_opts.realtime.m2 = $7;
1767                         hfsc_opts.realtime.used = 1;
1768                 }
1769                 | UPPERLIMIT bandwidth                          {
1770                         if (hfsc_opts.upperlimit.used) {
1771                                 yyerror("upperlimit already specified");
1772                                 YYERROR;
1773                         }
1774                         hfsc_opts.upperlimit.m2 = $2;
1775                         hfsc_opts.upperlimit.used = 1;
1776                 }
1777                 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1778                     {
1779                         if ($5 < 0 || $5 > INT_MAX) {
1780                                 yyerror("timing in curve out of range");
1781                                 YYERROR;
1782                         }
1783                         if (hfsc_opts.upperlimit.used) {
1784                                 yyerror("upperlimit already specified");
1785                                 YYERROR;
1786                         }
1787                         hfsc_opts.upperlimit.m1 = $3;
1788                         hfsc_opts.upperlimit.d = $5;
1789                         hfsc_opts.upperlimit.m2 = $7;
1790                         hfsc_opts.upperlimit.used = 1;
1791                 }
1792                 | STRING        {
1793                         if (!strcmp($1, "default"))
1794                                 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1795                         else if (!strcmp($1, "red"))
1796                                 hfsc_opts.flags |= HFCF_RED;
1797                         else if (!strcmp($1, "ecn"))
1798                                 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1799                         else if (!strcmp($1, "rio"))
1800                                 hfsc_opts.flags |= HFCF_RIO;
1801                         else {
1802                                 yyerror("unknown hfsc flag \"%s\"", $1);
1803                                 free($1);
1804                                 YYERROR;
1805                         }
1806                         free($1);
1807                 }
1808                 ;
1809
1810 qassign         : /* empty */           { $$ = NULL; }
1811                 | qassign_item          { $$ = $1; }
1812                 | '{' optnl qassign_list '}'    { $$ = $3; }
1813                 ;
1814
1815 qassign_list    : qassign_item optnl            { $$ = $1; }
1816                 | qassign_list comma qassign_item optnl {
1817                         $1->tail->next = $3;
1818                         $1->tail = $3;
1819                         $$ = $1;
1820                 }
1821                 ;
1822
1823 qassign_item    : STRING                        {
1824                         $$ = calloc(1, sizeof(struct node_queue));
1825                         if ($$ == NULL)
1826                                 err(1, "qassign_item: calloc");
1827                         if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
1828                             sizeof($$->queue)) {
1829                                 yyerror("queue name '%s' too long (max "
1830                                     "%d chars)", $1, sizeof($$->queue)-1);
1831                                 free($1);
1832                                 free($$);
1833                                 YYERROR;
1834                         }
1835                         free($1);
1836                         $$->next = NULL;
1837                         $$->tail = $$;
1838                 }
1839                 ;
1840
1841 pfrule          : action dir logquick interface route af proto fromto
1842                     filter_opts
1843                 {
1844                         struct pf_rule           r;
1845                         struct node_state_opt   *o;
1846                         struct node_proto       *proto;
1847                         int                      srctrack = 0;
1848                         int                      statelock = 0;
1849                         int                      adaptive = 0;
1850                         int                      defaults = 0;
1851
1852                         if (check_rulestate(PFCTL_STATE_FILTER))
1853                                 YYERROR;
1854
1855                         memset(&r, 0, sizeof(r));
1856
1857                         r.action = $1.b1;
1858                         switch ($1.b2) {
1859                         case PFRULE_RETURNRST:
1860                                 r.rule_flag |= PFRULE_RETURNRST;
1861                                 r.return_ttl = $1.w;
1862                                 break;
1863                         case PFRULE_RETURNICMP:
1864                                 r.rule_flag |= PFRULE_RETURNICMP;
1865                                 r.return_icmp = $1.w;
1866                                 r.return_icmp6 = $1.w2;
1867                                 break;
1868                         case PFRULE_RETURN:
1869                                 r.rule_flag |= PFRULE_RETURN;
1870                                 r.return_icmp = $1.w;
1871                                 r.return_icmp6 = $1.w2;
1872                                 break;
1873                         }
1874                         r.direction = $2;
1875                         r.log = $3.log;
1876                         r.logif = $3.logif;
1877                         r.quick = $3.quick;
1878                         r.prob = $9.prob;
1879                         r.rtableid = $9.rtableid;
1880
1881                         r.af = $6;
1882                         if ($9.tag)
1883                                 if (strlcpy(r.tagname, $9.tag,
1884                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1885                                         yyerror("tag too long, max %u chars",
1886                                             PF_TAG_NAME_SIZE - 1);
1887                                         YYERROR;
1888                                 }
1889                         if ($9.match_tag)
1890                                 if (strlcpy(r.match_tagname, $9.match_tag,
1891                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1892                                         yyerror("tag too long, max %u chars",
1893                                             PF_TAG_NAME_SIZE - 1);
1894                                         YYERROR;
1895                                 }
1896                         r.match_tag_not = $9.match_tag_not;
1897                         if (rule_label(&r, $9.label))
1898                                 YYERROR;
1899                         free($9.label);
1900                         r.flags = $9.flags.b1;
1901                         r.flagset = $9.flags.b2;
1902                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
1903                                 yyerror("flags always false");
1904                                 YYERROR;
1905                         }
1906                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
1907                                 for (proto = $7; proto != NULL &&
1908                                     proto->proto != IPPROTO_TCP;
1909                                     proto = proto->next)
1910                                         ;       /* nothing */
1911                                 if (proto == NULL && $7 != NULL) {
1912                                         if ($9.flags.b1 || $9.flags.b2)
1913                                                 yyerror(
1914                                                     "flags only apply to tcp");
1915                                         if ($8.src_os)
1916                                                 yyerror(
1917                                                     "OS fingerprinting only "
1918                                                     "apply to tcp");
1919                                         YYERROR;
1920                                 }
1921 #if 0
1922                                 if (($9.flags.b1 & parse_flags("S")) == 0 &&
1923                                     $8.src_os) {
1924                                         yyerror("OS fingerprinting requires "
1925                                             "the SYN TCP flag (flags S/SA)");
1926                                         YYERROR;
1927                                 }
1928 #endif
1929                         }
1930
1931                         r.tos = $9.tos;
1932                         r.keep_state = $9.keep.action;
1933                         o = $9.keep.options;
1934
1935                         /* 'keep state' by default on pass rules. */
1936                         if (!r.keep_state && !r.action &&
1937                             !($9.marker & FOM_KEEP)) {
1938                                 r.keep_state = PF_STATE_NORMAL;
1939                                 o = keep_state_defaults;
1940                                 defaults = 1;
1941                         }
1942
1943                         while (o) {
1944                                 struct node_state_opt   *p = o;
1945
1946                                 switch (o->type) {
1947                                 case PF_STATE_OPT_MAX:
1948                                         if (r.max_states) {
1949                                                 yyerror("state option 'max' "
1950                                                     "multiple definitions");
1951                                                 YYERROR;
1952                                         }
1953                                         r.max_states = o->data.max_states;
1954                                         break;
1955                                 case PF_STATE_OPT_NOSYNC:
1956                                         if (r.rule_flag & PFRULE_NOSYNC) {
1957                                                 yyerror("state option 'sync' "
1958                                                     "multiple definitions");
1959                                                 YYERROR;
1960                                         }
1961                                         r.rule_flag |= PFRULE_NOSYNC;
1962                                         break;
1963                                 case PF_STATE_OPT_SRCTRACK:
1964                                         if (srctrack) {
1965                                                 yyerror("state option "
1966                                                     "'source-track' "
1967                                                     "multiple definitions");
1968                                                 YYERROR;
1969                                         }
1970                                         srctrack =  o->data.src_track;
1971                                         r.rule_flag |= PFRULE_SRCTRACK;
1972                                         break;
1973                                 case PF_STATE_OPT_MAX_SRC_STATES:
1974                                         if (r.max_src_states) {
1975                                                 yyerror("state option "
1976                                                     "'max-src-states' "
1977                                                     "multiple definitions");
1978                                                 YYERROR;
1979                                         }
1980                                         if (o->data.max_src_states == 0) {
1981                                                 yyerror("'max-src-states' must "
1982                                                     "be > 0");
1983                                                 YYERROR;
1984                                         }
1985                                         r.max_src_states =
1986                                             o->data.max_src_states;
1987                                         r.rule_flag |= PFRULE_SRCTRACK;
1988                                         break;
1989                                 case PF_STATE_OPT_OVERLOAD:
1990                                         if (r.overload_tblname[0]) {
1991                                                 yyerror("multiple 'overload' "
1992                                                     "table definitions");
1993                                                 YYERROR;
1994                                         }
1995                                         if (strlcpy(r.overload_tblname,
1996                                             o->data.overload.tblname,
1997                                             PF_TABLE_NAME_SIZE) >=
1998                                             PF_TABLE_NAME_SIZE) {
1999                                                 yyerror("state option: "
2000                                                     "strlcpy");
2001                                                 YYERROR;
2002                                         }
2003                                         r.flush = o->data.overload.flush;
2004                                         break;
2005                                 case PF_STATE_OPT_MAX_SRC_CONN:
2006                                         if (r.max_src_conn) {
2007                                                 yyerror("state option "
2008                                                     "'max-src-conn' "
2009                                                     "multiple definitions");
2010                                                 YYERROR;
2011                                         }
2012                                         if (o->data.max_src_conn == 0) {
2013                                                 yyerror("'max-src-conn' "
2014                                                     "must be > 0");
2015                                                 YYERROR;
2016                                         }
2017                                         r.max_src_conn =
2018                                             o->data.max_src_conn;
2019                                         r.rule_flag |= PFRULE_SRCTRACK |
2020                                             PFRULE_RULESRCTRACK;
2021                                         break;
2022                                 case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2023                                         if (r.max_src_conn_rate.limit) {
2024                                                 yyerror("state option "
2025                                                     "'max-src-conn-rate' "
2026                                                     "multiple definitions");
2027                                                 YYERROR;
2028                                         }
2029                                         if (!o->data.max_src_conn_rate.limit ||
2030                                             !o->data.max_src_conn_rate.seconds) {
2031                                                 yyerror("'max-src-conn-rate' "
2032                                                     "values must be > 0");
2033                                                 YYERROR;
2034                                         }
2035                                         if (o->data.max_src_conn_rate.limit >
2036                                             PF_THRESHOLD_MAX) {
2037                                                 yyerror("'max-src-conn-rate' "
2038                                                     "maximum rate must be < %u",
2039                                                     PF_THRESHOLD_MAX);
2040                                                 YYERROR;
2041                                         }
2042                                         r.max_src_conn_rate.limit =
2043                                             o->data.max_src_conn_rate.limit;
2044                                         r.max_src_conn_rate.seconds =
2045                                             o->data.max_src_conn_rate.seconds;
2046                                         r.rule_flag |= PFRULE_SRCTRACK |
2047                                             PFRULE_RULESRCTRACK;
2048                                         break;
2049                                 case PF_STATE_OPT_MAX_SRC_NODES:
2050                                         if (r.max_src_nodes) {
2051                                                 yyerror("state option "
2052                                                     "'max-src-nodes' "
2053                                                     "multiple definitions");
2054                                                 YYERROR;
2055                                         }
2056                                         if (o->data.max_src_nodes == 0) {
2057                                                 yyerror("'max-src-nodes' must "
2058                                                     "be > 0");
2059                                                 YYERROR;
2060                                         }
2061                                         r.max_src_nodes =
2062                                             o->data.max_src_nodes;
2063                                         r.rule_flag |= PFRULE_SRCTRACK |
2064                                             PFRULE_RULESRCTRACK;
2065                                         break;
2066                                 case PF_STATE_OPT_STATELOCK:
2067                                         if (statelock) {
2068                                                 yyerror("state locking option: "
2069                                                     "multiple definitions");
2070                                                 YYERROR;
2071                                         }
2072                                         statelock = 1;
2073                                         r.rule_flag |= o->data.statelock;
2074                                         break;
2075                                 case PF_STATE_OPT_SLOPPY:
2076                                         if (r.rule_flag & PFRULE_STATESLOPPY) {
2077                                                 yyerror("state sloppy option: "
2078                                                     "multiple definitions");
2079                                                 YYERROR;
2080                                         }
2081                                         r.rule_flag |= PFRULE_STATESLOPPY;
2082                                         break;
2083                                 case PF_STATE_OPT_TIMEOUT:
2084                                         if (o->data.timeout.number ==
2085                                             PFTM_ADAPTIVE_START ||
2086                                             o->data.timeout.number ==
2087                                             PFTM_ADAPTIVE_END)
2088                                                 adaptive = 1;
2089                                         if (r.timeout[o->data.timeout.number]) {
2090                                                 yyerror("state timeout %s "
2091                                                     "multiple definitions",
2092                                                     pf_timeouts[o->data.
2093                                                     timeout.number].name);
2094                                                 YYERROR;
2095                                         }
2096                                         r.timeout[o->data.timeout.number] =
2097                                             o->data.timeout.seconds;
2098                                 }
2099                                 o = o->next;
2100                                 if (!defaults)
2101                                         free(p);
2102                         }
2103
2104                         /* 'flags S/SA' by default on stateful rules */
2105                         if (!r.action && !r.flags && !r.flagset &&
2106                             !$9.fragment && !($9.marker & FOM_FLAGS) &&
2107                             r.keep_state) {
2108                                 r.flags = parse_flags("S");
2109                                 r.flagset =  parse_flags("SA");
2110                         }
2111                         if (!adaptive && r.max_states) {
2112                                 r.timeout[PFTM_ADAPTIVE_START] =
2113                                     (r.max_states / 10) * 6;
2114                                 r.timeout[PFTM_ADAPTIVE_END] =
2115                                     (r.max_states / 10) * 12;
2116                         }
2117                         if (r.rule_flag & PFRULE_SRCTRACK) {
2118                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2119                                     r.max_src_nodes) {
2120                                         yyerror("'max-src-nodes' is "
2121                                             "incompatible with "
2122                                             "'source-track global'");
2123                                         YYERROR;
2124                                 }
2125                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2126                                     r.max_src_conn) {
2127                                         yyerror("'max-src-conn' is "
2128                                             "incompatible with "
2129                                             "'source-track global'");
2130                                         YYERROR;
2131                                 }
2132                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2133                                     r.max_src_conn_rate.seconds) {
2134                                         yyerror("'max-src-conn-rate' is "
2135                                             "incompatible with "
2136                                             "'source-track global'");
2137                                         YYERROR;
2138                                 }
2139                                 if (r.timeout[PFTM_SRC_NODE] <
2140                                     r.max_src_conn_rate.seconds)
2141                                         r.timeout[PFTM_SRC_NODE] =
2142                                             r.max_src_conn_rate.seconds;
2143                                 r.rule_flag |= PFRULE_SRCTRACK;
2144                                 if (srctrack == PF_SRCTRACK_RULE)
2145                                         r.rule_flag |= PFRULE_RULESRCTRACK;
2146                         }
2147                         if (r.keep_state && !statelock)
2148                                 r.rule_flag |= default_statelock;
2149
2150                         if ($9.fragment)
2151                                 r.rule_flag |= PFRULE_FRAGMENT;
2152                         r.allow_opts = $9.allowopts;
2153
2154                         decide_address_family($8.src.host, &r.af);
2155                         decide_address_family($8.dst.host, &r.af);
2156
2157                         if ($5.rt) {
2158                                 if (!r.direction) {
2159                                         yyerror("direction must be explicit "
2160                                             "with rules that specify routing");
2161                                         YYERROR;
2162                                 }
2163                                 r.rt = $5.rt;
2164                                 r.rpool.opts = $5.pool_opts;
2165                                 if ($5.key != NULL)
2166                                         memcpy(&r.rpool.key, $5.key,
2167                                             sizeof(struct pf_poolhashkey));
2168                         }
2169                         if (r.rt && r.rt != PF_FASTROUTE) {
2170                                 decide_address_family($5.host, &r.af);
2171                                 remove_invalid_hosts(&$5.host, &r.af);
2172                                 if ($5.host == NULL) {
2173                                         yyerror("no routing address with "
2174                                             "matching address family found.");
2175                                         YYERROR;
2176                                 }
2177                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2178                                     PF_POOL_NONE && ($5.host->next != NULL ||
2179                                     $5.host->addr.type == PF_ADDR_TABLE ||
2180                                     DYNIF_MULTIADDR($5.host->addr)))
2181                                         r.rpool.opts |= PF_POOL_ROUNDROBIN;
2182                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2183                                     PF_POOL_ROUNDROBIN &&
2184                                     disallow_table($5.host, "tables are only "
2185                                     "supported in round-robin routing pools"))
2186                                         YYERROR;
2187                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2188                                     PF_POOL_ROUNDROBIN &&
2189                                     disallow_alias($5.host, "interface (%s) "
2190                                     "is only supported in round-robin "
2191                                     "routing pools"))
2192                                         YYERROR;
2193                                 if ($5.host->next != NULL) {
2194                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2195                                             PF_POOL_ROUNDROBIN) {
2196                                                 yyerror("r.rpool.opts must "
2197                                                     "be PF_POOL_ROUNDROBIN");
2198                                                 YYERROR;
2199                                         }
2200                                 }
2201                         }
2202                         if ($9.queues.qname != NULL) {
2203                                 if (strlcpy(r.qname, $9.queues.qname,
2204                                     sizeof(r.qname)) >= sizeof(r.qname)) {
2205                                         yyerror("rule qname too long (max "
2206                                             "%d chars)", sizeof(r.qname)-1);
2207                                         YYERROR;
2208                                 }
2209                                 free($9.queues.qname);
2210                         }
2211                         if ($9.queues.pqname != NULL) {
2212                                 if (strlcpy(r.pqname, $9.queues.pqname,
2213                                     sizeof(r.pqname)) >= sizeof(r.pqname)) {
2214                                         yyerror("rule pqname too long (max "
2215                                             "%d chars)", sizeof(r.pqname)-1);
2216                                         YYERROR;
2217                                 }
2218                                 free($9.queues.pqname);
2219                         }
2220 #ifdef __FreeBSD__
2221                         r.divert.port = $9.divert.port;
2222 #else
2223                         if ((r.divert.port = $9.divert.port)) {
2224                                 if (r.direction == PF_OUT) {
2225                                         if ($9.divert.addr) {
2226                                                 yyerror("address specified "
2227                                                     "for outgoing divert");
2228                                                 YYERROR;
2229                                         }
2230                                         bzero(&r.divert.addr,
2231                                             sizeof(r.divert.addr));
2232                                 } else {
2233                                         if (!$9.divert.addr) {
2234                                                 yyerror("no address specified "
2235                                                     "for incoming divert");
2236                                                 YYERROR;
2237                                         }
2238                                         if ($9.divert.addr->af != r.af) {
2239                                                 yyerror("address family "
2240                                                     "mismatch for divert");
2241                                                 YYERROR;
2242                                         }
2243                                         r.divert.addr =
2244                                             $9.divert.addr->addr.v.a.addr;
2245                                 }
2246                         }
2247 #endif
2248
2249                         expand_rule(&r, $4, $5.host, $7, $8.src_os,
2250                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
2251                             $9.uid, $9.gid, $9.icmpspec, "");
2252                 }
2253                 ;
2254
2255 filter_opts     :       {
2256                                 bzero(&filter_opts, sizeof filter_opts);
2257                                 filter_opts.rtableid = -1;
2258                         }
2259                     filter_opts_l
2260                         { $$ = filter_opts; }
2261                 | /* empty */   {
2262                         bzero(&filter_opts, sizeof filter_opts);
2263                         filter_opts.rtableid = -1;
2264                         $$ = filter_opts;
2265                 }
2266                 ;
2267
2268 filter_opts_l   : filter_opts_l filter_opt
2269                 | filter_opt
2270                 ;
2271
2272 filter_opt      : USER uids {
2273                         if (filter_opts.uid)
2274                                 $2->tail->next = filter_opts.uid;
2275                         filter_opts.uid = $2;
2276                 }
2277                 | GROUP gids {
2278                         if (filter_opts.gid)
2279                                 $2->tail->next = filter_opts.gid;
2280                         filter_opts.gid = $2;
2281                 }
2282                 | flags {
2283                         if (filter_opts.marker & FOM_FLAGS) {
2284                                 yyerror("flags cannot be redefined");
2285                                 YYERROR;
2286                         }
2287                         filter_opts.marker |= FOM_FLAGS;
2288                         filter_opts.flags.b1 |= $1.b1;
2289                         filter_opts.flags.b2 |= $1.b2;
2290                         filter_opts.flags.w |= $1.w;
2291                         filter_opts.flags.w2 |= $1.w2;
2292                 }
2293                 | icmpspec {
2294                         if (filter_opts.marker & FOM_ICMP) {
2295                                 yyerror("icmp-type cannot be redefined");
2296                                 YYERROR;
2297                         }
2298                         filter_opts.marker |= FOM_ICMP;
2299                         filter_opts.icmpspec = $1;
2300                 }
2301                 | TOS tos {
2302                         if (filter_opts.marker & FOM_TOS) {
2303                                 yyerror("tos cannot be redefined");
2304                                 YYERROR;
2305                         }
2306                         filter_opts.marker |= FOM_TOS;
2307                         filter_opts.tos = $2;
2308                 }
2309                 | keep {
2310                         if (filter_opts.marker & FOM_KEEP) {
2311                                 yyerror("modulate or keep cannot be redefined");
2312                                 YYERROR;
2313                         }
2314                         filter_opts.marker |= FOM_KEEP;
2315                         filter_opts.keep.action = $1.action;
2316                         filter_opts.keep.options = $1.options;
2317                 }
2318                 | FRAGMENT {
2319                         filter_opts.fragment = 1;
2320                 }
2321                 | ALLOWOPTS {
2322                         filter_opts.allowopts = 1;
2323                 }
2324                 | label {
2325                         if (filter_opts.label) {
2326                                 yyerror("label cannot be redefined");
2327                                 YYERROR;
2328                         }
2329                         filter_opts.label = $1;
2330                 }
2331                 | qname {
2332                         if (filter_opts.queues.qname) {
2333                                 yyerror("queue cannot be redefined");
2334                                 YYERROR;
2335                         }
2336                         filter_opts.queues = $1;
2337                 }
2338                 | TAG string                            {
2339                         filter_opts.tag = $2;
2340                 }
2341                 | not TAGGED string                     {
2342                         filter_opts.match_tag = $3;
2343                         filter_opts.match_tag_not = $1;
2344                 }
2345                 | PROBABILITY probability               {
2346                         double  p;
2347
2348                         p = floor($2 * UINT_MAX + 0.5);
2349                         if (p < 0.0 || p > UINT_MAX) {
2350                                 yyerror("invalid probability: %lf", p);
2351                                 YYERROR;
2352                         }
2353                         filter_opts.prob = (u_int32_t)p;
2354                         if (filter_opts.prob == 0)
2355                                 filter_opts.prob = 1;
2356                 }
2357                 | RTABLE NUMBER                         {
2358                         if ($2 < 0 || $2 > rt_tableid_max()) {
2359                                 yyerror("invalid rtable id");
2360                                 YYERROR;
2361                         }
2362                         filter_opts.rtableid = $2;
2363                 }
2364                 | DIVERTTO portplain {
2365 #ifdef __FreeBSD__
2366                         filter_opts.divert.port = $2.a;
2367                         if (!filter_opts.divert.port) {
2368                                 yyerror("invalid divert port: %u", ntohs($2.a));
2369                                 YYERROR;
2370                         }
2371 #endif
2372                 }
2373                 | DIVERTTO STRING PORT portplain {
2374 #ifndef __FreeBSD__
2375                         if ((filter_opts.divert.addr = host($2)) == NULL) {
2376                                 yyerror("could not parse divert address: %s",
2377                                     $2);
2378                                 free($2);
2379                                 YYERROR;
2380                         }
2381 #else
2382                         if ($2)
2383 #endif
2384                         free($2);
2385                         filter_opts.divert.port = $4.a;
2386                         if (!filter_opts.divert.port) {
2387                                 yyerror("invalid divert port: %u", ntohs($4.a));
2388                                 YYERROR;
2389                         }
2390                 }
2391                 | DIVERTREPLY {
2392 #ifdef __FreeBSD__
2393                         yyerror("divert-reply has no meaning in FreeBSD pf(4)");
2394                         YYERROR;
2395 #else
2396                         filter_opts.divert.port = 1;    /* some random value */
2397 #endif
2398                 }
2399                 ;
2400
2401 probability     : STRING                                {
2402                         char    *e;
2403                         double   p = strtod($1, &e);
2404
2405                         if (*e == '%') {
2406                                 p *= 0.01;
2407                                 e++;
2408                         }
2409                         if (*e) {
2410                                 yyerror("invalid probability: %s", $1);
2411                                 free($1);
2412                                 YYERROR;
2413                         }
2414                         free($1);
2415                         $$ = p;
2416                 }
2417                 | NUMBER                                {
2418                         $$ = (double)$1;
2419                 }
2420                 ;
2421
2422
2423 action          : PASS                  { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
2424                 | BLOCK blockspec       { $$ = $2; $$.b1 = PF_DROP; }
2425                 ;
2426
2427 blockspec       : /* empty */           {
2428                         $$.b2 = blockpolicy;
2429                         $$.w = returnicmpdefault;
2430                         $$.w2 = returnicmp6default;
2431                 }
2432                 | DROP                  {
2433                         $$.b2 = PFRULE_DROP;
2434                         $$.w = 0;
2435                         $$.w2 = 0;
2436                 }
2437                 | RETURNRST             {
2438                         $$.b2 = PFRULE_RETURNRST;
2439                         $$.w = 0;
2440                         $$.w2 = 0;
2441                 }
2442                 | RETURNRST '(' TTL NUMBER ')'  {
2443                         if ($4 < 0 || $4 > 255) {
2444                                 yyerror("illegal ttl value %d", $4);
2445                                 YYERROR;
2446                         }
2447                         $$.b2 = PFRULE_RETURNRST;
2448                         $$.w = $4;
2449                         $$.w2 = 0;
2450                 }
2451                 | RETURNICMP            {
2452                         $$.b2 = PFRULE_RETURNICMP;
2453                         $$.w = returnicmpdefault;
2454                         $$.w2 = returnicmp6default;
2455                 }
2456                 | RETURNICMP6           {
2457                         $$.b2 = PFRULE_RETURNICMP;
2458                         $$.w = returnicmpdefault;
2459                         $$.w2 = returnicmp6default;
2460                 }
2461                 | RETURNICMP '(' reticmpspec ')'        {
2462                         $$.b2 = PFRULE_RETURNICMP;
2463                         $$.w = $3;
2464                         $$.w2 = returnicmpdefault;
2465                 }
2466                 | RETURNICMP6 '(' reticmp6spec ')'      {
2467                         $$.b2 = PFRULE_RETURNICMP;
2468                         $$.w = returnicmpdefault;
2469                         $$.w2 = $3;
2470                 }
2471                 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2472                         $$.b2 = PFRULE_RETURNICMP;
2473                         $$.w = $3;
2474                         $$.w2 = $5;
2475                 }
2476                 | RETURN {
2477                         $$.b2 = PFRULE_RETURN;
2478                         $$.w = returnicmpdefault;
2479                         $$.w2 = returnicmp6default;
2480                 }
2481                 ;
2482
2483 reticmpspec     : STRING                        {
2484                         if (!($$ = parseicmpspec($1, AF_INET))) {
2485                                 free($1);
2486                                 YYERROR;
2487                         }
2488                         free($1);
2489                 }
2490                 | NUMBER                        {
2491                         u_int8_t                icmptype;
2492
2493                         if ($1 < 0 || $1 > 255) {
2494                                 yyerror("invalid icmp code %lu", $1);
2495                                 YYERROR;
2496                         }
2497                         icmptype = returnicmpdefault >> 8;
2498                         $$ = (icmptype << 8 | $1);
2499                 }
2500                 ;
2501
2502 reticmp6spec    : STRING                        {
2503                         if (!($$ = parseicmpspec($1, AF_INET6))) {
2504                                 free($1);
2505                                 YYERROR;
2506                         }
2507                         free($1);
2508                 }
2509                 | NUMBER                        {
2510                         u_int8_t                icmptype;
2511
2512                         if ($1 < 0 || $1 > 255) {
2513                                 yyerror("invalid icmp code %lu", $1);
2514                                 YYERROR;
2515                         }
2516                         icmptype = returnicmp6default >> 8;
2517                         $$ = (icmptype << 8 | $1);
2518                 }
2519                 ;
2520
2521 dir             : /* empty */                   { $$ = PF_INOUT; }
2522                 | IN                            { $$ = PF_IN; }
2523                 | OUT                           { $$ = PF_OUT; }
2524                 ;
2525
2526 quick           : /* empty */                   { $$.quick = 0; }
2527                 | QUICK                         { $$.quick = 1; }
2528                 ;
2529
2530 logquick        : /* empty */   { $$.log = 0; $$.quick = 0; $$.logif = 0; }
2531                 | log           { $$ = $1; $$.quick = 0; }
2532                 | QUICK         { $$.quick = 1; $$.log = 0; $$.logif = 0; }
2533                 | log QUICK     { $$ = $1; $$.quick = 1; }
2534                 | QUICK log     { $$ = $2; $$.quick = 1; }
2535                 ;
2536
2537 log             : LOG                   { $$.log = PF_LOG; $$.logif = 0; }
2538                 | LOG '(' logopts ')'   {
2539                         $$.log = PF_LOG | $3.log;
2540                         $$.logif = $3.logif;
2541                 }
2542                 ;
2543
2544 logopts         : logopt                        { $$ = $1; }
2545                 | logopts comma logopt          {
2546                         $$.log = $1.log | $3.log;
2547                         $$.logif = $3.logif;
2548                         if ($$.logif == 0)
2549                                 $$.logif = $1.logif;
2550                 }
2551                 ;
2552
2553 logopt          : ALL           { $$.log = PF_LOG_ALL; $$.logif = 0; }
2554                 | USER          { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2555                 | GROUP         { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2556                 | TO string     {
2557                         const char      *errstr;
2558                         u_int            i;
2559
2560                         $$.log = 0;
2561                         if (strncmp($2, "pflog", 5)) {
2562                                 yyerror("%s: should be a pflog interface", $2);
2563                                 free($2);
2564                                 YYERROR;
2565                         }
2566                         i = strtonum($2 + 5, 0, 255, &errstr);
2567                         if (errstr) {
2568                                 yyerror("%s: %s", $2, errstr);
2569                                 free($2);
2570                                 YYERROR;
2571                         }
2572                         free($2);
2573                         $$.logif = i;
2574                 }
2575                 ;
2576
2577 interface       : /* empty */                   { $$ = NULL; }
2578                 | ON if_item_not                { $$ = $2; }
2579                 | ON '{' optnl if_list '}'      { $$ = $4; }
2580                 ;
2581
2582 if_list         : if_item_not optnl             { $$ = $1; }
2583                 | if_list comma if_item_not optnl       {
2584                         $1->tail->next = $3;
2585                         $1->tail = $3;
2586                         $$ = $1;
2587                 }
2588                 ;
2589
2590 if_item_not     : not if_item                   { $$ = $2; $$->not = $1; }
2591                 ;
2592
2593 if_item         : STRING                        {
2594                         struct node_host        *n;
2595
2596                         $$ = calloc(1, sizeof(struct node_if));
2597                         if ($$ == NULL)
2598                                 err(1, "if_item: calloc");
2599                         if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2600                             sizeof($$->ifname)) {
2601                                 free($1);
2602                                 free($$);
2603                                 yyerror("interface name too long");
2604                                 YYERROR;
2605                         }
2606
2607                         if ((n = ifa_exists($1)) != NULL)
2608                                 $$->ifa_flags = n->ifa_flags;
2609
2610                         free($1);
2611                         $$->not = 0;
2612                         $$->next = NULL;
2613                         $$->tail = $$;
2614                 }
2615                 ;
2616
2617 af              : /* empty */                   { $$ = 0; }
2618                 | INET                          { $$ = AF_INET; }
2619                 | INET6                         { $$ = AF_INET6; }
2620                 ;
2621
2622 proto           : /* empty */                           { $$ = NULL; }
2623                 | PROTO proto_item                      { $$ = $2; }
2624                 | PROTO '{' optnl proto_list '}'        { $$ = $4; }
2625                 ;
2626
2627 proto_list      : proto_item optnl              { $$ = $1; }
2628                 | proto_list comma proto_item optnl     {
2629                         $1->tail->next = $3;
2630                         $1->tail = $3;
2631                         $$ = $1;
2632                 }
2633                 ;
2634
2635 proto_item      : protoval                      {
2636                         u_int8_t        pr;
2637
2638                         pr = (u_int8_t)$1;
2639                         if (pr == 0) {
2640                                 yyerror("proto 0 cannot be used");
2641                                 YYERROR;
2642                         }
2643                         $$ = calloc(1, sizeof(struct node_proto));
2644                         if ($$ == NULL)
2645                                 err(1, "proto_item: calloc");
2646                         $$->proto = pr;
2647                         $$->next = NULL;
2648                         $$->tail = $$;
2649                 }
2650                 ;
2651
2652 protoval        : STRING                        {
2653                         struct protoent *p;
2654
2655                         p = getprotobyname($1);
2656                         if (p == NULL) {
2657                                 yyerror("unknown protocol %s", $1);
2658                                 free($1);
2659                                 YYERROR;
2660                         }
2661                         $$ = p->p_proto;
2662                         free($1);
2663                 }
2664                 | NUMBER                        {
2665                         if ($1 < 0 || $1 > 255) {
2666                                 yyerror("protocol outside range");
2667                                 YYERROR;
2668                         }
2669                 }
2670                 ;
2671
2672 fromto          : ALL                           {
2673                         $$.src.host = NULL;
2674                         $$.src.port = NULL;
2675                         $$.dst.host = NULL;
2676                         $$.dst.port = NULL;
2677                         $$.src_os = NULL;
2678                 }
2679                 | from os to                    {
2680                         $$.src = $1;
2681                         $$.src_os = $2;
2682                         $$.dst = $3;
2683                 }
2684                 ;
2685
2686 os              : /* empty */                   { $$ = NULL; }
2687                 | OS xos                        { $$ = $2; }
2688                 | OS '{' optnl os_list '}'      { $$ = $4; }
2689                 ;
2690
2691 xos             : STRING {
2692                         $$ = calloc(1, sizeof(struct node_os));
2693                         if ($$ == NULL)
2694                                 err(1, "os: calloc");
2695                         $$->os = $1;
2696                         $$->tail = $$;
2697                 }
2698                 ;
2699
2700 os_list         : xos optnl                     { $$ = $1; }
2701                 | os_list comma xos optnl       {
2702                         $1->tail->next = $3;
2703                         $1->tail = $3;
2704                         $$ = $1;
2705                 }
2706                 ;
2707
2708 from            : /* empty */                   {
2709                         $$.host = NULL;
2710                         $$.port = NULL;
2711                 }
2712                 | FROM ipportspec               {
2713                         $$ = $2;
2714                 }
2715                 ;
2716
2717 to              : /* empty */                   {
2718                         $$.host = NULL;
2719                         $$.port = NULL;
2720                 }
2721                 | TO ipportspec         {
2722                         if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
2723                             "not permitted in a destination address"))
2724                                 YYERROR;
2725                         $$ = $2;
2726                 }
2727                 ;
2728
2729 ipportspec      : ipspec                        {
2730                         $$.host = $1;
2731                         $$.port = NULL;
2732                 }
2733                 | ipspec PORT portspec          {
2734                         $$.host = $1;
2735                         $$.port = $3;
2736                 }
2737                 | PORT portspec                 {
2738                         $$.host = NULL;
2739                         $$.port = $2;
2740                 }
2741                 ;
2742
2743 optnl           : '\n' optnl
2744                 |
2745                 ;
2746
2747 ipspec          : ANY                           { $$ = NULL; }
2748                 | xhost                         { $$ = $1; }
2749                 | '{' optnl host_list '}'       { $$ = $3; }
2750                 ;
2751
2752 toipspec        : TO ipspec                     { $$ = $2; }
2753                 | /* empty */                   { $$ = NULL; }
2754                 ;
2755
2756 host_list       : ipspec optnl                  { $$ = $1; }
2757                 | host_list comma ipspec optnl  {
2758                         if ($3 == NULL)
2759                                 $$ = $1;
2760                         else if ($1 == NULL)
2761                                 $$ = $3;
2762                         else {
2763                                 $1->tail->next = $3;
2764                                 $1->tail = $3->tail;
2765                                 $$ = $1;
2766                         }
2767                 }
2768                 ;
2769
2770 xhost           : not host                      {
2771                         struct node_host        *n;
2772
2773                         for (n = $2; n != NULL; n = n->next)
2774                                 n->not = $1;
2775                         $$ = $2;
2776                 }
2777                 | not NOROUTE                   {
2778                         $$ = calloc(1, sizeof(struct node_host));
2779                         if ($$ == NULL)
2780                                 err(1, "xhost: calloc");
2781                         $$->addr.type = PF_ADDR_NOROUTE;
2782                         $$->next = NULL;
2783                         $$->not = $1;
2784                         $$->tail = $$;
2785                 }
2786                 | not URPFFAILED                {
2787                         $$ = calloc(1, sizeof(struct node_host));
2788                         if ($$ == NULL)
2789                                 err(1, "xhost: calloc");
2790                         $$->addr.type = PF_ADDR_URPFFAILED;
2791                         $$->next = NULL;
2792                         $$->not = $1;
2793                         $$->tail = $$;
2794                 }
2795                 ;
2796
2797 host            : STRING                        {
2798                         if (($$ = host($1)) == NULL)    {
2799                                 /* error. "any" is handled elsewhere */
2800                                 free($1);
2801                                 yyerror("could not parse host specification");
2802                                 YYERROR;
2803                         }
2804                         free($1);
2805
2806                 }
2807                 | STRING '-' STRING             {
2808                         struct node_host *b, *e;
2809
2810                         if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
2811                                 free($1);
2812                                 free($3);
2813                                 yyerror("could not parse host specification");
2814                                 YYERROR;
2815                         }
2816                         if (b->af != e->af ||
2817                             b->addr.type != PF_ADDR_ADDRMASK ||
2818                             e->addr.type != PF_ADDR_ADDRMASK ||
2819                             unmask(&b->addr.v.a.mask, b->af) !=
2820                             (b->af == AF_INET ? 32 : 128) ||
2821                             unmask(&e->addr.v.a.mask, e->af) !=
2822                             (e->af == AF_INET ? 32 : 128) ||
2823                             b->next != NULL || b->not ||
2824                             e->next != NULL || e->not) {
2825                                 free(b);
2826                                 free(e);
2827                                 free($1);
2828                                 free($3);
2829                                 yyerror("invalid address range");
2830                                 YYERROR;
2831                         }
2832                         memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
2833                             sizeof(b->addr.v.a.mask));
2834                         b->addr.type = PF_ADDR_RANGE;
2835                         $$ = b;
2836                         free(e);
2837                         free($1);
2838                         free($3);
2839                 }
2840                 | STRING '/' NUMBER             {
2841                         char    *buf;
2842
2843                         if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1)
2844                                 err(1, "host: asprintf");
2845                         free($1);
2846                         if (($$ = host(buf)) == NULL)   {
2847                                 /* error. "any" is handled elsewhere */
2848                                 free(buf);
2849                                 yyerror("could not parse host specification");
2850                                 YYERROR;
2851                         }
2852                         free(buf);
2853                 }
2854                 | NUMBER '/' NUMBER             {
2855                         char    *buf;
2856
2857                         /* ie. for 10/8 parsing */
2858 #ifdef __FreeBSD__
2859                         if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1)
2860 #else
2861                         if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
2862 #endif
2863                                 err(1, "host: asprintf");
2864                         if (($$ = host(buf)) == NULL)   {
2865                                 /* error. "any" is handled elsewhere */
2866                                 free(buf);
2867                                 yyerror("could not parse host specification");
2868                                 YYERROR;
2869                         }
2870                         free(buf);
2871                 }
2872                 | dynaddr
2873                 | dynaddr '/' NUMBER            {
2874                         struct node_host        *n;
2875
2876                         if ($3 < 0 || $3 > 128) {
2877                                 yyerror("bit number too big");
2878                                 YYERROR;
2879                         }
2880                         $$ = $1;
2881                         for (n = $1; n != NULL; n = n->next)
2882                                 set_ipmask(n, $3);
2883                 }
2884                 | '<' STRING '>'        {
2885                         if (strlen($2) >= PF_TABLE_NAME_SIZE) {
2886                                 yyerror("table name '%s' too long", $2);
2887                                 free($2);
2888                                 YYERROR;
2889                         }
2890                         $$ = calloc(1, sizeof(struct node_host));
2891                         if ($$ == NULL)
2892                                 err(1, "host: calloc");
2893                         $$->addr.type = PF_ADDR_TABLE;
2894                         if (strlcpy($$->addr.v.tblname, $2,
2895                             sizeof($$->addr.v.tblname)) >=
2896                             sizeof($$->addr.v.tblname))
2897                                 errx(1, "host: strlcpy");
2898                         free($2);
2899                         $$->next = NULL;
2900                         $$->tail = $$;
2901                 }
2902                 ;
2903
2904 number          : NUMBER
2905                 | STRING                {
2906                         u_long  ulval;
2907
2908                         if (atoul($1, &ulval) == -1) {
2909                                 yyerror("%s is not a number", $1);
2910                                 free($1);
2911                                 YYERROR;
2912                         } else
2913                                 $$ = ulval;
2914                         free($1);
2915                 }
2916                 ;
2917
2918 dynaddr         : '(' STRING ')'                {
2919                         int      flags = 0;
2920                         char    *p, *op;
2921
2922                         op = $2;
2923                         if (!isalpha(op[0])) {
2924                                 yyerror("invalid interface name '%s'", op);
2925                                 free(op);
2926                                 YYERROR;
2927                         }
2928                         while ((p = strrchr($2, ':')) != NULL) {
2929                                 if (!strcmp(p+1, "network"))
2930                                         flags |= PFI_AFLAG_NETWORK;
2931                                 else if (!strcmp(p+1, "broadcast"))
2932                                         flags |= PFI_AFLAG_BROADCAST;
2933                                 else if (!strcmp(p+1, "peer"))
2934                                         flags |= PFI_AFLAG_PEER;
2935                                 else if (!strcmp(p+1, "0"))
2936                                         flags |= PFI_AFLAG_NOALIAS;
2937                                 else {
2938                                         yyerror("interface %s has bad modifier",
2939                                             $2);
2940                                         free(op);
2941                                         YYERROR;
2942                                 }
2943                                 *p = '\0';
2944                         }
2945                         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
2946                                 free(op);
2947                                 yyerror("illegal combination of "
2948                                     "interface modifiers");
2949                                 YYERROR;
2950                         }
2951                         $$ = calloc(1, sizeof(struct node_host));
2952                         if ($$ == NULL)
2953                                 err(1, "address: calloc");
2954                         $$->af = 0;
2955                         set_ipmask($$, 128);
2956                         $$->addr.type = PF_ADDR_DYNIFTL;
2957                         $$->addr.iflags = flags;
2958                         if (strlcpy($$->addr.v.ifname, $2,
2959                             sizeof($$->addr.v.ifname)) >=
2960                             sizeof($$->addr.v.ifname)) {
2961                                 free(op);
2962                                 free($$);
2963                                 yyerror("interface name too long");
2964                                 YYERROR;
2965                         }
2966                         free(op);
2967                         $$->next = NULL;
2968                         $$->tail = $$;
2969                 }
2970                 ;
2971
2972 portspec        : port_item                     { $$ = $1; }
2973                 | '{' optnl port_list '}'       { $$ = $3; }
2974                 ;
2975
2976 port_list       : port_item optnl               { $$ = $1; }
2977                 | port_list comma port_item optnl       {
2978                         $1->tail->next = $3;
2979                         $1->tail = $3;
2980                         $$ = $1;
2981                 }
2982                 ;
2983
2984 port_item       : portrange                     {
2985                         $$ = calloc(1, sizeof(struct node_port));
2986                         if ($$ == NULL)
2987                                 err(1, "port_item: calloc");
2988                         $$->port[0] = $1.a;
2989                         $$->port[1] = $1.b;
2990                         if ($1.t)
2991                                 $$->op = PF_OP_RRG;
2992                         else
2993                                 $$->op = PF_OP_EQ;
2994                         $$->next = NULL;
2995                         $$->tail = $$;
2996                 }
2997                 | unaryop portrange     {
2998                         if ($2.t) {
2999                                 yyerror("':' cannot be used with an other "
3000                                     "port operator");
3001                                 YYERROR;
3002                         }
3003                         $$ = calloc(1, sizeof(struct node_port));
3004                         if ($$ == NULL)
3005                                 err(1, "port_item: calloc");
3006                         $$->port[0] = $2.a;
3007                         $$->port[1] = $2.b;
3008                         $$->op = $1;
3009                         $$->next = NULL;
3010                         $$->tail = $$;
3011                 }
3012                 | portrange PORTBINARY portrange        {
3013                         if ($1.t || $3.t) {
3014                                 yyerror("':' cannot be used with an other "
3015                                     "port operator");
3016                                 YYERROR;
3017                         }
3018                         $$ = calloc(1, sizeof(struct node_port));
3019                         if ($$ == NULL)
3020                                 err(1, "port_item: calloc");
3021                         $$->port[0] = $1.a;
3022                         $$->port[1] = $3.a;
3023                         $$->op = $2;
3024                         $$->next = NULL;
3025                         $$->tail = $$;
3026                 }
3027                 ;
3028
3029 portplain       : numberstring                  {
3030                         if (parseport($1, &$$, 0) == -1) {
3031                                 free($1);
3032                                 YYERROR;
3033                         }
3034                         free($1);
3035                 }
3036                 ;
3037
3038 portrange       : numberstring                  {
3039                         if (parseport($1, &$$, PPORT_RANGE) == -1) {
3040                                 free($1);
3041                                 YYERROR;
3042                         }
3043                         free($1);
3044                 }
3045                 ;
3046
3047 uids            : uid_item                      { $$ = $1; }
3048                 | '{' optnl uid_list '}'        { $$ = $3; }
3049                 ;
3050
3051 uid_list        : uid_item optnl                { $$ = $1; }
3052                 | uid_list comma uid_item optnl {
3053                         $1->tail->next = $3;
3054                         $1->tail = $3;
3055                         $$ = $1;
3056                 }
3057                 ;
3058
3059 uid_item        : uid                           {
3060                         $$ = calloc(1, sizeof(struct node_uid));
3061                         if ($$ == NULL)
3062                                 err(1, "uid_item: calloc");
3063                         $$->uid[0] = $1;
3064                         $$->uid[1] = $1;
3065                         $$->op = PF_OP_EQ;
3066                         $$->next = NULL;
3067                         $$->tail = $$;
3068                 }
3069                 | unaryop uid                   {
3070                         if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3071                                 yyerror("user unknown requires operator = or "
3072                                     "!=");
3073                                 YYERROR;
3074                         }
3075                         $$ = calloc(1, sizeof(struct node_uid));
3076                         if ($$ == NULL)
3077                                 err(1, "uid_item: calloc");
3078                         $$->uid[0] = $2;
3079                         $$->uid[1] = $2;
3080                         $$->op = $1;
3081                         $$->next = NULL;
3082                         $$->tail = $$;
3083                 }
3084                 | uid PORTBINARY uid            {
3085                         if ($1 == UID_MAX || $3 == UID_MAX) {
3086                                 yyerror("user unknown requires operator = or "
3087                                     "!=");
3088                                 YYERROR;
3089                         }
3090                         $$ = calloc(1, sizeof(struct node_uid));
3091                         if ($$ == NULL)
3092                                 err(1, "uid_item: calloc");
3093                         $$->uid[0] = $1;
3094                         $$->uid[1] = $3;
3095                         $$->op = $2;
3096                         $$->next = NULL;
3097                         $$->tail = $$;
3098                 }
3099                 ;
3100
3101 uid             : STRING                        {
3102                         if (!strcmp($1, "unknown"))
3103                                 $$ = UID_MAX;
3104                         else {
3105                                 struct passwd   *pw;
3106
3107                                 if ((pw = getpwnam($1)) == NULL) {
3108                                         yyerror("unknown user %s", $1);
3109                                         free($1);
3110                                         YYERROR;
3111                                 }
3112                                 $$ = pw->pw_uid;
3113                         }
3114                         free($1);
3115                 }
3116                 | NUMBER                        {
3117                         if ($1 < 0 || $1 >= UID_MAX) {
3118                                 yyerror("illegal uid value %lu", $1);
3119                                 YYERROR;
3120                         }
3121                         $$ = $1;
3122                 }
3123                 ;
3124
3125 gids            : gid_item                      { $$ = $1; }
3126                 | '{' optnl gid_list '}'        { $$ = $3; }
3127                 ;
3128
3129 gid_list        : gid_item optnl                { $$ = $1; }
3130                 | gid_list comma gid_item optnl {
3131                         $1->tail->next = $3;
3132                         $1->tail = $3;
3133                         $$ = $1;
3134                 }
3135                 ;
3136
3137 gid_item        : gid                           {
3138                         $$ = calloc(1, sizeof(struct node_gid));
3139                         if ($$ == NULL)
3140                                 err(1, "gid_item: calloc");
3141                         $$->gid[0] = $1;
3142                         $$->gid[1] = $1;
3143                         $$->op = PF_OP_EQ;
3144                         $$->next = NULL;
3145                         $$->tail = $$;
3146                 }
3147                 | unaryop gid                   {
3148                         if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3149                                 yyerror("group unknown requires operator = or "
3150                                     "!=");
3151                                 YYERROR;
3152                         }
3153                         $$ = calloc(1, sizeof(struct node_gid));
3154                         if ($$ == NULL)
3155                                 err(1, "gid_item: calloc");
3156                         $$->gid[0] = $2;
3157                         $$->gid[1] = $2;
3158                         $$->op = $1;
3159                         $$->next = NULL;
3160                         $$->tail = $$;
3161                 }
3162                 | gid PORTBINARY gid            {
3163                         if ($1 == GID_MAX || $3 == GID_MAX) {
3164                                 yyerror("group unknown requires operator = or "
3165                                     "!=");
3166                                 YYERROR;
3167                         }
3168                         $$ = calloc(1, sizeof(struct node_gid));
3169                         if ($$ == NULL)
3170                                 err(1, "gid_item: calloc");
3171                         $$->gid[0] = $1;
3172                         $$->gid[1] = $3;
3173                         $$->op = $2;
3174                         $$->next = NULL;
3175                         $$->tail = $$;
3176                 }
3177                 ;
3178
3179 gid             : STRING                        {
3180                         if (!strcmp($1, "unknown"))
3181                                 $$ = GID_MAX;
3182                         else {
3183                                 struct group    *grp;
3184
3185                                 if ((grp = getgrnam($1)) == NULL) {
3186                                         yyerror("unknown group %s", $1);
3187                                         free($1);
3188                                         YYERROR;
3189                                 }
3190                                 $$ = grp->gr_gid;
3191                         }
3192                         free($1);
3193                 }
3194                 | NUMBER                        {
3195                         if ($1 < 0 || $1 >= GID_MAX) {
3196                                 yyerror("illegal gid value %lu", $1);
3197                                 YYERROR;
3198                         }
3199                         $$ = $1;
3200                 }
3201                 ;
3202
3203 flag            : STRING                        {
3204                         int     f;
3205
3206                         if ((f = parse_flags($1)) < 0) {
3207                                 yyerror("bad flags %s", $1);
3208                                 free($1);
3209                                 YYERROR;
3210                         }
3211                         free($1);
3212                         $$.b1 = f;
3213                 }
3214                 ;
3215
3216 flags           : FLAGS flag '/' flag   { $$.b1 = $2.b1; $$.b2 = $4.b1; }
3217                 | FLAGS '/' flag        { $$.b1 = 0; $$.b2 = $3.b1; }
3218                 | FLAGS ANY             { $$.b1 = 0; $$.b2 = 0; }
3219                 ;
3220
3221 icmpspec        : ICMPTYPE icmp_item                    { $$ = $2; }
3222                 | ICMPTYPE '{' optnl icmp_list '}'      { $$ = $4; }
3223                 | ICMP6TYPE icmp6_item                  { $$ = $2; }
3224                 | ICMP6TYPE '{' optnl icmp6_list '}'    { $$ = $4; }
3225                 ;
3226
3227 icmp_list       : icmp_item optnl               { $$ = $1; }
3228                 | icmp_list comma icmp_item optnl {
3229                         $1->tail->next = $3;
3230                         $1->tail = $3;
3231                         $$ = $1;
3232                 }
3233                 ;
3234
3235 icmp6_list      : icmp6_item optnl              { $$ = $1; }
3236                 | icmp6_list comma icmp6_item optnl {
3237                         $1->tail->next = $3;
3238                         $1->tail = $3;
3239                         $$ = $1;
3240                 }
3241                 ;
3242
3243 icmp_item       : icmptype              {
3244                         $$ = calloc(1, sizeof(struct node_icmp));
3245                         if ($$ == NULL)
3246                                 err(1, "icmp_item: calloc");
3247                         $$->type = $1;
3248                         $$->code = 0;
3249                         $$->proto = IPPROTO_ICMP;
3250                         $$->next = NULL;
3251                         $$->tail = $$;
3252                 }
3253                 | icmptype CODE STRING  {
3254                         const struct icmpcodeent        *p;
3255
3256                         if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3257                                 yyerror("unknown icmp-code %s", $3);
3258                                 free($3);
3259                                 YYERROR;
3260                         }
3261
3262                         free($3);
3263                         $$ = calloc(1, sizeof(struct node_icmp));
3264                         if ($$ == NULL)
3265                                 err(1, "icmp_item: calloc");
3266                         $$->type = $1;
3267                         $$->code = p->code + 1;
3268                         $$->proto = IPPROTO_ICMP;
3269                         $$->next = NULL;
3270                         $$->tail = $$;
3271                 }
3272                 | icmptype CODE NUMBER  {
3273                         if ($3 < 0 || $3 > 255) {
3274                                 yyerror("illegal icmp-code %lu", $3);
3275                                 YYERROR;
3276                         }
3277                         $$ = calloc(1, sizeof(struct node_icmp));
3278                         if ($$ == NULL)
3279                                 err(1, "icmp_item: calloc");
3280                         $$->type = $1;
3281                         $$->code = $3 + 1;
3282                         $$->proto = IPPROTO_ICMP;
3283                         $$->next = NULL;
3284                         $$->tail = $$;
3285                 }
3286                 ;
3287
3288 icmp6_item      : icmp6type             {
3289                         $$ = calloc(1, sizeof(struct node_icmp));
3290                         if ($$ == NULL)
3291                                 err(1, "icmp_item: calloc");
3292                         $$->type = $1;
3293                         $$->code = 0;
3294                         $$->proto = IPPROTO_ICMPV6;
3295                         $$->next = NULL;
3296                         $$->tail = $$;
3297                 }
3298                 | icmp6type CODE STRING {
3299                         const struct icmpcodeent        *p;
3300
3301                         if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3302                                 yyerror("unknown icmp6-code %s", $3);
3303                                 free($3);
3304                                 YYERROR;
3305                         }
3306                         free($3);
3307
3308                         $$ = calloc(1, sizeof(struct node_icmp));
3309                         if ($$ == NULL)
3310                                 err(1, "icmp_item: calloc");
3311                         $$->type = $1;
3312                         $$->code = p->code + 1;
3313                         $$->proto = IPPROTO_ICMPV6;
3314                         $$->next = NULL;
3315                         $$->tail = $$;
3316                 }
3317                 | icmp6type CODE NUMBER {
3318                         if ($3 < 0 || $3 > 255) {
3319                                 yyerror("illegal icmp-code %lu", $3);
3320                                 YYERROR;
3321                         }
3322                         $$ = calloc(1, sizeof(struct node_icmp));
3323                         if ($$ == NULL)
3324                                 err(1, "icmp_item: calloc");
3325                         $$->type = $1;
3326                         $$->code = $3 + 1;
3327                         $$->proto = IPPROTO_ICMPV6;
3328                         $$->next = NULL;
3329                         $$->tail = $$;
3330                 }
3331                 ;
3332
3333 icmptype        : STRING                        {
3334                         const struct icmptypeent        *p;
3335
3336                         if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3337                                 yyerror("unknown icmp-type %s", $1);
3338                                 free($1);
3339                                 YYERROR;
3340                         }
3341                         $$ = p->type + 1;
3342                         free($1);
3343                 }
3344                 | NUMBER                        {
3345                         if ($1 < 0 || $1 > 255) {
3346                                 yyerror("illegal icmp-type %lu", $1);
3347                                 YYERROR;
3348                         }
3349                         $$ = $1 + 1;
3350                 }
3351                 ;
3352
3353 icmp6type       : STRING                        {
3354                         const struct icmptypeent        *p;
3355
3356                         if ((p = geticmptypebyname($1, AF_INET6)) ==
3357                             NULL) {
3358                                 yyerror("unknown icmp6-type %s", $1);
3359                                 free($1);
3360                                 YYERROR;
3361                         }
3362                         $$ = p->type + 1;
3363                         free($1);
3364                 }
3365                 | NUMBER                        {
3366                         if ($1 < 0 || $1 > 255) {
3367                                 yyerror("illegal icmp6-type %lu", $1);
3368                                 YYERROR;
3369                         }
3370                         $$ = $1 + 1;
3371                 }
3372                 ;
3373
3374 tos     : STRING                        {
3375                         if (!strcmp($1, "lowdelay"))
3376                                 $$ = IPTOS_LOWDELAY;
3377                         else if (!strcmp($1, "throughput"))
3378                                 $$ = IPTOS_THROUGHPUT;
3379                         else if (!strcmp($1, "reliability"))
3380                                 $$ = IPTOS_RELIABILITY;
3381                         else if ($1[0] == '0' && $1[1] == 'x')
3382                                 $$ = strtoul($1, NULL, 16);
3383                         else
3384                                 $$ = 0;         /* flag bad argument */
3385                         if (!$$ || $$ > 255) {
3386                                 yyerror("illegal tos value %s", $1);
3387                                 free($1);
3388                                 YYERROR;
3389                         }
3390                         free($1);
3391                 }
3392                 | NUMBER                        {
3393                         $$ = $1;
3394                         if (!$$ || $$ > 255) {
3395                                 yyerror("illegal tos value %s", $1);
3396                                 YYERROR;
3397                         }
3398                 }
3399                 ;
3400
3401 sourcetrack     : SOURCETRACK           { $$ = PF_SRCTRACK; }
3402                 | SOURCETRACK GLOBAL    { $$ = PF_SRCTRACK_GLOBAL; }
3403                 | SOURCETRACK RULE      { $$ = PF_SRCTRACK_RULE; }
3404                 ;
3405
3406 statelock       : IFBOUND {
3407                         $$ = PFRULE_IFBOUND;
3408                 }
3409                 | FLOATING {
3410                         $$ = 0;
3411                 }
3412                 ;
3413
3414 keep            : NO STATE                      {
3415                         $$.action = 0;
3416                         $$.options = NULL;
3417                 }
3418                 | KEEP STATE state_opt_spec     {
3419                         $$.action = PF_STATE_NORMAL;
3420                         $$.options = $3;
3421                 }
3422                 | MODULATE STATE state_opt_spec {
3423                         $$.action = PF_STATE_MODULATE;
3424                         $$.options = $3;
3425                 }
3426                 | SYNPROXY STATE state_opt_spec {
3427                         $$.action = PF_STATE_SYNPROXY;
3428                         $$.options = $3;
3429                 }
3430                 ;
3431
3432 flush           : /* empty */                   { $$ = 0; }
3433                 | FLUSH                         { $$ = PF_FLUSH; }
3434                 | FLUSH GLOBAL                  {
3435                         $$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3436                 }
3437                 ;
3438
3439 state_opt_spec  : '(' state_opt_list ')'        { $$ = $2; }
3440                 | /* empty */                   { $$ = NULL; }
3441                 ;
3442
3443 state_opt_list  : state_opt_item                { $$ = $1; }
3444                 | state_opt_list comma state_opt_item {
3445                         $1->tail->next = $3;
3446                         $1->tail = $3;
3447                         $$ = $1;
3448                 }
3449                 ;
3450
3451 state_opt_item  : MAXIMUM NUMBER                {
3452                         if ($2 < 0 || $2 > UINT_MAX) {
3453                                 yyerror("only positive values permitted");
3454                                 YYERROR;
3455                         }
3456                         $$ = calloc(1, sizeof(struct node_state_opt));
3457                         if ($$ == NULL)
3458                                 err(1, "state_opt_item: calloc");
3459                         $$->type = PF_STATE_OPT_MAX;
3460                         $$->data.max_states = $2;
3461                         $$->next = NULL;
3462                         $$->tail = $$;
3463                 }
3464                 | NOSYNC                                {
3465                         $$ = calloc(1, sizeof(struct node_state_opt));
3466                         if ($$ == NULL)
3467                                 err(1, "state_opt_item: calloc");
3468                         $$->type = PF_STATE_OPT_NOSYNC;
3469                         $$->next = NULL;
3470                         $$->tail = $$;
3471                 }
3472                 | MAXSRCSTATES NUMBER                   {
3473                         if ($2 < 0 || $2 > UINT_MAX) {
3474                                 yyerror("only positive values permitted");
3475                                 YYERROR;
3476                         }
3477                         $$ = calloc(1, sizeof(struct node_state_opt));
3478                         if ($$ == NULL)
3479                                 err(1, "state_opt_item: calloc");
3480                         $$->type = PF_STATE_OPT_MAX_SRC_STATES;
3481                         $$->data.max_src_states = $2;
3482                         $$->next = NULL;
3483                         $$->tail = $$;
3484                 }
3485                 | MAXSRCCONN NUMBER                     {
3486                         if ($2 < 0 || $2 > UINT_MAX) {
3487                                 yyerror("only positive values permitted");
3488                                 YYERROR;
3489                         }
3490                         $$ = calloc(1, sizeof(struct node_state_opt));
3491                         if ($$ == NULL)
3492                                 err(1, "state_opt_item: calloc");
3493                         $$->type = PF_STATE_OPT_MAX_SRC_CONN;
3494                         $$->data.max_src_conn = $2;
3495                         $$->next = NULL;
3496                         $$->tail = $$;
3497                 }
3498                 | MAXSRCCONNRATE NUMBER '/' NUMBER      {
3499                         if ($2 < 0 || $2 > UINT_MAX ||
3500                             $4 < 0 || $4 > UINT_MAX) {
3501                                 yyerror("only positive values permitted");
3502                                 YYERROR;
3503                         }
3504                         $$ = calloc(1, sizeof(struct node_state_opt));
3505                         if ($$ == NULL)
3506                                 err(1, "state_opt_item: calloc");
3507                         $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3508                         $$->data.max_src_conn_rate.limit = $2;
3509                         $$->data.max_src_conn_rate.seconds = $4;
3510                         $$->next = NULL;
3511                         $$->tail = $$;
3512                 }
3513                 | OVERLOAD '<' STRING '>' flush         {
3514                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3515                                 yyerror("table name '%s' too long", $3);
3516                                 free($3);
3517                                 YYERROR;
3518                         }
3519                         $$ = calloc(1, sizeof(struct node_state_opt));
3520                         if ($$ == NULL)
3521                                 err(1, "state_opt_item: calloc");
3522                         if (strlcpy($$->data.overload.tblname, $3,
3523                             PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3524                                 errx(1, "state_opt_item: strlcpy");
3525                         free($3);
3526                         $$->type = PF_STATE_OPT_OVERLOAD;
3527                         $$->data.overload.flush = $5;
3528                         $$->next = NULL;
3529                         $$->tail = $$;
3530                 }
3531                 | MAXSRCNODES NUMBER                    {
3532                         if ($2 < 0 || $2 > UINT_MAX) {
3533                                 yyerror("only positive values permitted");
3534                                 YYERROR;
3535                         }
3536                         $$ = calloc(1, sizeof(struct node_state_opt));
3537                         if ($$ == NULL)
3538                                 err(1, "state_opt_item: calloc");
3539                         $$->type = PF_STATE_OPT_MAX_SRC_NODES;
3540                         $$->data.max_src_nodes = $2;
3541                         $$->next = NULL;
3542                         $$->tail = $$;
3543                 }
3544                 | sourcetrack {
3545                         $$ = calloc(1, sizeof(struct node_state_opt));
3546                         if ($$ == NULL)
3547                                 err(1, "state_opt_item: calloc");
3548                         $$->type = PF_STATE_OPT_SRCTRACK;
3549                         $$->data.src_track = $1;
3550                         $$->next = NULL;
3551                         $$->tail = $$;
3552                 }
3553                 | statelock {
3554                         $$ = calloc(1, sizeof(struct node_state_opt));
3555                         if ($$ == NULL)
3556                                 err(1, "state_opt_item: calloc");
3557                         $$->type = PF_STATE_OPT_STATELOCK;
3558                         $$->data.statelock = $1;
3559                         $$->next = NULL;
3560                         $$->tail = $$;
3561                 }
3562                 | SLOPPY {
3563                         $$ = calloc(1, sizeof(struct node_state_opt));
3564                         if ($$ == NULL)
3565                                 err(1, "state_opt_item: calloc");
3566                         $$->type = PF_STATE_OPT_SLOPPY;
3567                         $$->next = NULL;
3568                         $$->tail = $$;
3569                 }
3570                 | STRING NUMBER                 {
3571                         int     i;
3572
3573                         if ($2 < 0 || $2 > UINT_MAX) {
3574                                 yyerror("only positive values permitted");
3575                                 YYERROR;
3576                         }
3577                         for (i = 0; pf_timeouts[i].name &&
3578                             strcmp(pf_timeouts[i].name, $1); ++i)
3579                                 ;       /* nothing */
3580                         if (!pf_timeouts[i].name) {
3581                                 yyerror("illegal timeout name %s", $1);
3582                                 free($1);
3583                                 YYERROR;
3584                         }
3585                         if (strchr(pf_timeouts[i].name, '.') == NULL) {
3586                                 yyerror("illegal state timeout %s", $1);
3587                                 free($1);
3588                                 YYERROR;
3589                         }
3590                         free($1);
3591                         $$ = calloc(1, sizeof(struct node_state_opt));
3592                         if ($$ == NULL)
3593                                 err(1, "state_opt_item: calloc");
3594                         $$->type = PF_STATE_OPT_TIMEOUT;
3595                         $$->data.timeout.number = pf_timeouts[i].timeout;
3596                         $$->data.timeout.seconds = $2;
3597                         $$->next = NULL;
3598                         $$->tail = $$;
3599                 }
3600                 ;
3601
3602 label           : LABEL STRING                  {
3603                         $$ = $2;
3604                 }
3605                 ;
3606
3607 qname           : QUEUE STRING                          {
3608                         $$.qname = $2;
3609                         $$.pqname = NULL;
3610                 }
3611                 | QUEUE '(' STRING ')'                  {
3612                         $$.qname = $3;
3613                         $$.pqname = NULL;
3614                 }
3615                 | QUEUE '(' STRING comma STRING ')'     {
3616                         $$.qname = $3;
3617                         $$.pqname = $5;
3618                 }
3619                 ;
3620
3621 no              : /* empty */                   { $$ = 0; }
3622                 | NO                            { $$ = 1; }
3623                 ;
3624
3625 portstar        : numberstring                  {
3626                         if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3627                                 free($1);
3628                                 YYERROR;
3629                         }
3630                         free($1);
3631                 }
3632                 ;
3633
3634 redirspec       : host                          { $$ = $1; }
3635                 | '{' optnl redir_host_list '}' { $$ = $3; }
3636                 ;
3637
3638 redir_host_list : host optnl                    { $$ = $1; }
3639                 | redir_host_list comma host optnl {
3640                         $1->tail->next = $3;
3641                         $1->tail = $3->tail;
3642                         $$ = $1;
3643                 }
3644                 ;
3645
3646 redirpool       : /* empty */                   { $$ = NULL; }
3647                 | ARROW redirspec               {
3648                         $$ = calloc(1, sizeof(struct redirection));
3649                         if ($$ == NULL)
3650                                 err(1, "redirection: calloc");
3651                         $$->host = $2;
3652                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3653                 }
3654                 | ARROW redirspec PORT portstar {
3655                         $$ = calloc(1, sizeof(struct redirection));
3656                         if ($$ == NULL)
3657                                 err(1, "redirection: calloc");
3658                         $$->host = $2;
3659                         $$->rport = $4;
3660                 }
3661                 ;
3662
3663 hashkey         : /* empty */
3664                 {
3665                         $$ = calloc(1, sizeof(struct pf_poolhashkey));
3666                         if ($$ == NULL)
3667                                 err(1, "hashkey: calloc");
3668                         $$->key32[0] = arc4random();
3669                         $$->key32[1] = arc4random();
3670                         $$->key32[2] = arc4random();
3671                         $$->key32[3] = arc4random();
3672                 }
3673                 | string
3674                 {
3675                         if (!strncmp($1, "0x", 2)) {
3676                                 if (strlen($1) != 34) {
3677                                         free($1);
3678                                         yyerror("hex key must be 128 bits "
3679                                                 "(32 hex digits) long");
3680                                         YYERROR;
3681                                 }
3682                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3683                                 if ($$ == NULL)
3684                                         err(1, "hashkey: calloc");
3685
3686                                 if (sscanf($1, "0x%8x%8x%8x%8x",
3687                                     &$$->key32[0], &$$->key32[1],
3688                                     &$$->key32[2], &$$->key32[3]) != 4) {
3689                                         free($$);
3690                                         free($1);
3691                                         yyerror("invalid hex key");
3692                                         YYERROR;
3693                                 }
3694                         } else {
3695                                 MD5_CTX context;
3696
3697                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3698                                 if ($$ == NULL)
3699                                         err(1, "hashkey: calloc");
3700                                 MD5Init(&context);
3701                                 MD5Update(&context, (unsigned char *)$1,
3702                                     strlen($1));
3703                                 MD5Final((unsigned char *)$$, &context);
3704                                 HTONL($$->key32[0]);
3705                                 HTONL($$->key32[1]);
3706                                 HTONL($$->key32[2]);
3707                                 HTONL($$->key32[3]);
3708                         }
3709                         free($1);
3710                 }
3711                 ;
3712
3713 pool_opts       :       { bzero(&pool_opts, sizeof pool_opts); }
3714                     pool_opts_l
3715                         { $$ = pool_opts; }
3716                 | /* empty */   {
3717                         bzero(&pool_opts, sizeof pool_opts);
3718                         $$ = pool_opts;
3719                 }
3720                 ;
3721
3722 pool_opts_l     : pool_opts_l pool_opt
3723                 | pool_opt
3724                 ;
3725
3726 pool_opt        : BITMASK       {
3727                         if (pool_opts.type) {
3728                                 yyerror("pool type cannot be redefined");
3729                                 YYERROR;
3730                         }
3731                         pool_opts.type =  PF_POOL_BITMASK;
3732                 }
3733                 | RANDOM        {
3734                         if (pool_opts.type) {
3735                                 yyerror("pool type cannot be redefined");
3736                                 YYERROR;
3737                         }
3738                         pool_opts.type = PF_POOL_RANDOM;
3739                 }
3740                 | SOURCEHASH hashkey {
3741                         if (pool_opts.type) {
3742                                 yyerror("pool type cannot be redefined");
3743                                 YYERROR;
3744                         }
3745                         pool_opts.type = PF_POOL_SRCHASH;
3746                         pool_opts.key = $2;
3747                 }
3748                 | ROUNDROBIN    {
3749                         if (pool_opts.type) {
3750                                 yyerror("pool type cannot be redefined");
3751                                 YYERROR;
3752                         }
3753                         pool_opts.type = PF_POOL_ROUNDROBIN;
3754                 }
3755                 | STATICPORT    {
3756                         if (pool_opts.staticport) {
3757                                 yyerror("static-port cannot be redefined");
3758                                 YYERROR;
3759                         }
3760                         pool_opts.staticport = 1;
3761                 }
3762                 | STICKYADDRESS {
3763                         if (filter_opts.marker & POM_STICKYADDRESS) {
3764                                 yyerror("sticky-address cannot be redefined");
3765                                 YYERROR;
3766                         }
3767                         pool_opts.marker |= POM_STICKYADDRESS;
3768                         pool_opts.opts |= PF_POOL_STICKYADDR;
3769                 }
3770                 ;
3771
3772 redirection     : /* empty */                   { $$ = NULL; }
3773                 | ARROW host                    {
3774                         $$ = calloc(1, sizeof(struct redirection));
3775                         if ($$ == NULL)
3776                                 err(1, "redirection: calloc");
3777                         $$->host = $2;
3778                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3779                 }
3780                 | ARROW host PORT portstar      {
3781                         $$ = calloc(1, sizeof(struct redirection));
3782                         if ($$ == NULL)
3783                                 err(1, "redirection: calloc");
3784                         $$->host = $2;
3785                         $$->rport = $4;
3786                 }
3787                 ;
3788
3789 natpasslog      : /* empty */   { $$.b1 = $$.b2 = 0; $$.w2 = 0; }
3790                 | PASS          { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
3791                 | PASS log      { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
3792                 | log           { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
3793                 ;
3794
3795 nataction       : no NAT natpasslog {
3796                         if ($1 && $3.b1) {
3797                                 yyerror("\"pass\" not valid with \"no\"");
3798                                 YYERROR;
3799                         }
3800                         if ($1)
3801                                 $$.b1 = PF_NONAT;
3802                         else
3803                                 $$.b1 = PF_NAT;
3804                         $$.b2 = $3.b1;
3805                         $$.w = $3.b2;
3806                         $$.w2 = $3.w2;
3807                 }
3808                 | no RDR natpasslog {
3809                         if ($1 && $3.b1) {
3810                                 yyerror("\"pass\" not valid with \"no\"");
3811                                 YYERROR;
3812                         }
3813                         if ($1)
3814                                 $$.b1 = PF_NORDR;
3815                         else
3816                                 $$.b1 = PF_RDR;
3817                         $$.b2 = $3.b1;
3818                         $$.w = $3.b2;
3819                         $$.w2 = $3.w2;
3820                 }
3821                 ;
3822
3823 natrule         : nataction interface af proto fromto tag tagged rtable
3824                     redirpool pool_opts
3825                 {
3826                         struct pf_rule  r;
3827
3828                         if (check_rulestate(PFCTL_STATE_NAT))
3829                                 YYERROR;
3830
3831                         memset(&r, 0, sizeof(r));
3832
3833                         r.action = $1.b1;
3834                         r.natpass = $1.b2;
3835                         r.log = $1.w;
3836                         r.logif = $1.w2;
3837                         r.af = $3;
3838
3839                         if (!r.af) {
3840                                 if ($5.src.host && $5.src.host->af &&
3841                                     !$5.src.host->ifindex)
3842                                         r.af = $5.src.host->af;
3843                                 else if ($5.dst.host && $5.dst.host->af &&
3844                                     !$5.dst.host->ifindex)
3845                                         r.af = $5.dst.host->af;
3846                         }
3847
3848                         if ($6 != NULL)
3849                                 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
3850                                     PF_TAG_NAME_SIZE) {
3851                                         yyerror("tag too long, max %u chars",
3852                                             PF_TAG_NAME_SIZE - 1);
3853                                         YYERROR;
3854                                 }
3855
3856                         if ($7.name)
3857                                 if (strlcpy(r.match_tagname, $7.name,
3858                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
3859                                         yyerror("tag too long, max %u chars",
3860                                             PF_TAG_NAME_SIZE - 1);
3861                                         YYERROR;
3862                                 }
3863                         r.match_tag_not = $7.neg;
3864                         r.rtableid = $8;
3865
3866                         if (r.action == PF_NONAT || r.action == PF_NORDR) {
3867                                 if ($9 != NULL) {
3868                                         yyerror("translation rule with 'no' "
3869                                             "does not need '->'");
3870                                         YYERROR;
3871                                 }
3872                         } else {
3873                                 if ($9 == NULL || $9->host == NULL) {
3874                                         yyerror("translation rule requires '-> "
3875                                             "address'");
3876                                         YYERROR;
3877                                 }
3878                                 if (!r.af && ! $9->host->ifindex)
3879                                         r.af = $9->host->af;
3880
3881                                 remove_invalid_hosts(&$9->host, &r.af);
3882                                 if (invalid_redirect($9->host, r.af))
3883                                         YYERROR;
3884                                 if (check_netmask($9->host, r.af))
3885                                         YYERROR;
3886
3887                                 r.rpool.proxy_port[0] = ntohs($9->rport.a);
3888
3889                                 switch (r.action) {
3890                                 case PF_RDR:
3891                                         if (!$9->rport.b && $9->rport.t &&
3892                                             $5.dst.port != NULL) {
3893                                                 r.rpool.proxy_port[1] =
3894                                                     ntohs($9->rport.a) +
3895                                                     (ntohs(
3896                                                     $5.dst.port->port[1]) -
3897                                                     ntohs(
3898                                                     $5.dst.port->port[0]));
3899                                         } else
3900                                                 r.rpool.proxy_port[1] =
3901                                                     ntohs($9->rport.b);
3902                                         break;
3903                                 case PF_NAT:
3904                                         r.rpool.proxy_port[1] =
3905                                             ntohs($9->rport.b);
3906                                         if (!r.rpool.proxy_port[0] &&
3907                                             !r.rpool.proxy_port[1]) {
3908                                                 r.rpool.proxy_port[0] =
3909                                                     PF_NAT_PROXY_PORT_LOW;
3910                                                 r.rpool.proxy_port[1] =
3911                                                     PF_NAT_PROXY_PORT_HIGH;
3912                                         } else if (!r.rpool.proxy_port[1])
3913                                                 r.rpool.proxy_port[1] =
3914                                                     r.rpool.proxy_port[0];
3915                                         break;
3916                                 default:
3917                                         break;
3918                                 }
3919
3920                                 r.rpool.opts = $10.type;
3921                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
3922                                     PF_POOL_NONE && ($9->host->next != NULL ||
3923                                     $9->host->addr.type == PF_ADDR_TABLE ||
3924                                     DYNIF_MULTIADDR($9->host->addr)))
3925                                         r.rpool.opts = PF_POOL_ROUNDROBIN;
3926                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3927                                     PF_POOL_ROUNDROBIN &&
3928                                     disallow_table($9->host, "tables are only "
3929                                     "supported in round-robin redirection "
3930                                     "pools"))
3931                                         YYERROR;
3932                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3933                                     PF_POOL_ROUNDROBIN &&
3934                                     disallow_alias($9->host, "interface (%s) "
3935                                     "is only supported in round-robin "
3936                                     "redirection pools"))
3937                                         YYERROR;
3938                                 if ($9->host->next != NULL) {
3939                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3940                                             PF_POOL_ROUNDROBIN) {
3941                                                 yyerror("only round-robin "
3942                                                     "valid for multiple "
3943                                                     "redirection addresses");
3944                                                 YYERROR;
3945                                         }
3946                                 }
3947                         }
3948
3949                         if ($10.key != NULL)
3950                                 memcpy(&r.rpool.key, $10.key,
3951                                     sizeof(struct pf_poolhashkey));
3952
3953                          if ($10.opts)
3954                                 r.rpool.opts |= $10.opts;
3955
3956                         if ($10.staticport) {
3957                                 if (r.action != PF_NAT) {
3958                                         yyerror("the 'static-port' option is "
3959                                             "only valid with nat rules");
3960                                         YYERROR;
3961                                 }
3962                                 if (r.rpool.proxy_port[0] !=
3963                                     PF_NAT_PROXY_PORT_LOW &&
3964                                     r.rpool.proxy_port[1] !=
3965                                     PF_NAT_PROXY_PORT_HIGH) {
3966                                         yyerror("the 'static-port' option can't"
3967                                             " be used when specifying a port"
3968                                             " range");
3969                                         YYERROR;
3970                                 }
3971                                 r.rpool.proxy_port[0] = 0;
3972                                 r.rpool.proxy_port[1] = 0;
3973                         }
3974
3975                         expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
3976                             $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
3977                             $5.dst.port, 0, 0, 0, "");
3978                         free($9);
3979                 }
3980                 ;
3981
3982 binatrule       : no BINAT natpasslog interface af proto FROM host toipspec tag
3983                     tagged rtable redirection
3984                 {
3985                         struct pf_rule          binat;
3986                         struct pf_pooladdr      *pa;
3987
3988                         if (check_rulestate(PFCTL_STATE_NAT))
3989                                 YYERROR;
3990                         if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
3991                             "permitted as a binat destination"))
3992                                 YYERROR;
3993
3994                         memset(&binat, 0, sizeof(binat));
3995
3996                         if ($1 && $3.b1) {
3997                                 yyerror("\"pass\" not valid with \"no\"");
3998                                 YYERROR;
3999                         }
4000                         if ($1)
4001                                 binat.action = PF_NOBINAT;
4002                         else
4003                                 binat.action = PF_BINAT;
4004                         binat.natpass = $3.b1;
4005                         binat.log = $3.b2;
4006                         binat.logif = $3.w2;
4007                         binat.af = $5;
4008                         if (!binat.af && $8 != NULL && $8->af)
4009                                 binat.af = $8->af;
4010                         if (!binat.af && $9 != NULL && $9->af)
4011                                 binat.af = $9->af;
4012
4013                         if (!binat.af && $13 != NULL && $13->host)
4014                                 binat.af = $13->host->af;
4015                         if (!binat.af) {
4016                                 yyerror("address family (inet/inet6) "
4017                                     "undefined");
4018                                 YYERROR;
4019                         }
4020
4021                         if ($4 != NULL) {
4022                                 memcpy(binat.ifname, $4->ifname,
4023                                     sizeof(binat.ifname));
4024                                 binat.ifnot = $4->not;
4025                                 free($4);
4026                         }
4027
4028                         if ($10 != NULL)
4029                                 if (strlcpy(binat.tagname, $10,
4030                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4031                                         yyerror("tag too long, max %u chars",
4032                                             PF_TAG_NAME_SIZE - 1);
4033                                         YYERROR;
4034                                 }
4035                         if ($11.name)
4036                                 if (strlcpy(binat.match_tagname, $11.name,
4037                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4038                                         yyerror("tag too long, max %u chars",
4039                                             PF_TAG_NAME_SIZE - 1);
4040                                         YYERROR;
4041                                 }
4042                         binat.match_tag_not = $11.neg;
4043                         binat.rtableid = $12;
4044
4045                         if ($6 != NULL) {
4046                                 binat.proto = $6->proto;
4047                                 free($6);
4048                         }
4049
4050                         if ($8 != NULL && disallow_table($8, "invalid use of "
4051                             "table <%s> as the source address of a binat rule"))
4052                                 YYERROR;
4053                         if ($8 != NULL && disallow_alias($8, "invalid use of "
4054                             "interface (%s) as the source address of a binat "
4055                             "rule"))
4056                                 YYERROR;
4057                         if ($13 != NULL && $13->host != NULL && disallow_table(
4058                             $13->host, "invalid use of table <%s> as the "
4059                             "redirect address of a binat rule"))
4060                                 YYERROR;
4061                         if ($13 != NULL && $13->host != NULL && disallow_alias(
4062                             $13->host, "invalid use of interface (%s) as the "
4063                             "redirect address of a binat rule"))
4064                                 YYERROR;
4065
4066                         if ($8 != NULL) {
4067                                 if ($8->next) {
4068                                         yyerror("multiple binat ip addresses");
4069                                         YYERROR;
4070                                 }
4071                                 if ($8->addr.type == PF_ADDR_DYNIFTL)
4072                                         $8->af = binat.af;
4073                                 if ($8->af != binat.af) {
4074                                         yyerror("binat ip versions must match");
4075                                         YYERROR;
4076                                 }
4077                                 if (check_netmask($8, binat.af))
4078                                         YYERROR;
4079                                 memcpy(&binat.src.addr, &$8->addr,
4080                                     sizeof(binat.src.addr));
4081                                 free($8);
4082                         }
4083                         if ($9 != NULL) {
4084                                 if ($9->next) {
4085                                         yyerror("multiple binat ip addresses");
4086                                         YYERROR;
4087                                 }
4088                                 if ($9->af != binat.af && $9->af) {
4089                                         yyerror("binat ip versions must match");
4090                                         YYERROR;
4091                                 }
4092                                 if (check_netmask($9, binat.af))
4093                                         YYERROR;
4094                                 memcpy(&binat.dst.addr, &$9->addr,
4095                                     sizeof(binat.dst.addr));
4096                                 binat.dst.neg = $9->not;
4097                                 free($9);
4098                         }
4099
4100                         if (binat.action == PF_NOBINAT) {
4101                                 if ($13 != NULL) {
4102                                         yyerror("'no binat' rule does not need"
4103                                             " '->'");
4104                                         YYERROR;
4105                                 }
4106                         } else {
4107                                 if ($13 == NULL || $13->host == NULL) {
4108                                         yyerror("'binat' rule requires"
4109                                             " '-> address'");
4110                                         YYERROR;
4111                                 }
4112
4113                                 remove_invalid_hosts(&$13->host, &binat.af);
4114                                 if (invalid_redirect($13->host, binat.af))
4115                                         YYERROR;
4116                                 if ($13->host->next != NULL) {
4117                                         yyerror("binat rule must redirect to "
4118                                             "a single address");
4119                                         YYERROR;
4120                                 }
4121                                 if (check_netmask($13->host, binat.af))
4122                                         YYERROR;
4123
4124                                 if (!PF_AZERO(&binat.src.addr.v.a.mask,
4125                                     binat.af) &&
4126                                     !PF_AEQ(&binat.src.addr.v.a.mask,
4127                                     &$13->host->addr.v.a.mask, binat.af)) {
4128                                         yyerror("'binat' source mask and "
4129                                             "redirect mask must be the same");
4130                                         YYERROR;
4131                                 }
4132
4133                                 TAILQ_INIT(&binat.rpool.list);
4134                                 pa = calloc(1, sizeof(struct pf_pooladdr));
4135                                 if (pa == NULL)
4136                                         err(1, "binat: calloc");
4137                                 pa->addr = $13->host->addr;
4138                                 pa->ifname[0] = 0;
4139                                 TAILQ_INSERT_TAIL(&binat.rpool.list,
4140                                     pa, entries);
4141
4142                                 free($13);
4143                         }
4144
4145                         pfctl_add_rule(pf, &binat, "");
4146                 }
4147                 ;
4148
4149 tag             : /* empty */           { $$ = NULL; }
4150                 | TAG STRING            { $$ = $2; }
4151                 ;
4152
4153 tagged          : /* empty */           { $$.neg = 0; $$.name = NULL; }
4154                 | not TAGGED string     { $$.neg = $1; $$.name = $3; }
4155                 ;
4156
4157 rtable          : /* empty */           { $$ = -1; }
4158                 | RTABLE NUMBER         {
4159                         if ($2 < 0 || $2 > rt_tableid_max()) {
4160                                 yyerror("invalid rtable id");
4161                                 YYERROR;
4162                         }
4163                         $$ = $2;
4164                 }
4165                 ;
4166
4167 route_host      : STRING                        {
4168                         $$ = calloc(1, sizeof(struct node_host));
4169                         if ($$ == NULL)
4170                                 err(1, "route_host: calloc");
4171                         $$->ifname = $1;
4172                         set_ipmask($$, 128);
4173                         $$->next = NULL;
4174                         $$->tail = $$;
4175                 }
4176                 | '(' STRING host ')'           {
4177                         $$ = $3;
4178                         $$->ifname = $2;
4179                 }
4180                 ;
4181
4182 route_host_list : route_host optnl                      { $$ = $1; }
4183                 | route_host_list comma route_host optnl {
4184                         if ($1->af == 0)
4185                                 $1->af = $3->af;
4186                         if ($1->af != $3->af) {
4187                                 yyerror("all pool addresses must be in the "
4188                                     "same address family");
4189                                 YYERROR;
4190                         }
4191                         $1->tail->next = $3;
4192                         $1->tail = $3->tail;
4193                         $$ = $1;
4194                 }
4195                 ;
4196
4197 routespec       : route_host                    { $$ = $1; }
4198                 | '{' optnl route_host_list '}' { $$ = $3; }
4199                 ;
4200
4201 route           : /* empty */                   {
4202                         $$.host = NULL;
4203                         $$.rt = 0;
4204                         $$.pool_opts = 0;
4205                 }
4206                 | FASTROUTE {
4207                         $$.host = NULL;
4208                         $$.rt = PF_FASTROUTE;
4209                         $$.pool_opts = 0;
4210                 }
4211                 | ROUTETO routespec pool_opts {
4212                         $$.host = $2;
4213                         $$.rt = PF_ROUTETO;
4214                         $$.pool_opts = $3.type | $3.opts;
4215                         if ($3.key != NULL)
4216                                 $$.key = $3.key;
4217                 }
4218                 | REPLYTO routespec pool_opts {
4219                         $$.host = $2;
4220                         $$.rt = PF_REPLYTO;
4221                         $$.pool_opts = $3.type | $3.opts;
4222                         if ($3.key != NULL)
4223                                 $$.key = $3.key;
4224                 }
4225                 | DUPTO routespec pool_opts {
4226                         $$.host = $2;
4227                         $$.rt = PF_DUPTO;
4228                         $$.pool_opts = $3.type | $3.opts;
4229                         if ($3.key != NULL)
4230                                 $$.key = $3.key;
4231                 }
4232                 ;
4233
4234 timeout_spec    : STRING NUMBER
4235                 {
4236                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4237                                 free($1);
4238                                 YYERROR;
4239                         }
4240                         if ($2 < 0 || $2 > UINT_MAX) {
4241                                 yyerror("only positive values permitted");
4242                                 YYERROR;
4243                         }
4244                         if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
4245                                 yyerror("unknown timeout %s", $1);
4246                                 free($1);
4247                                 YYERROR;
4248                         }
4249                         free($1);
4250                 }
4251                 ;
4252
4253 timeout_list    : timeout_list comma timeout_spec optnl
4254                 | timeout_spec optnl
4255                 ;
4256
4257 limit_spec      : STRING NUMBER
4258                 {
4259                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4260                                 free($1);
4261                                 YYERROR;
4262                         }
4263                         if ($2 < 0 || $2 > UINT_MAX) {
4264                                 yyerror("only positive values permitted");
4265                                 YYERROR;
4266                         }
4267                         if (pfctl_set_limit(pf, $1, $2) != 0) {
4268                                 yyerror("unable to set limit %s %u", $1, $2);
4269                                 free($1);
4270                                 YYERROR;
4271                         }
4272                         free($1);
4273                 }
4274                 ;
4275
4276 limit_list      : limit_list comma limit_spec optnl
4277                 | limit_spec optnl
4278                 ;
4279
4280 comma           : ','
4281                 | /* empty */
4282                 ;
4283
4284 yesno           : NO                    { $$ = 0; }
4285                 | STRING                {
4286                         if (!strcmp($1, "yes"))
4287                                 $$ = 1;
4288                         else {
4289                                 yyerror("invalid value '%s', expected 'yes' "
4290                                     "or 'no'", $1);
4291                                 free($1);
4292                                 YYERROR;
4293                         }
4294                         free($1);
4295                 }
4296                 ;
4297
4298 unaryop         : '='           { $$ = PF_OP_EQ; }
4299                 | '!' '='       { $$ = PF_OP_NE; }
4300                 | '<' '='       { $$ = PF_OP_LE; }
4301                 | '<'           { $$ = PF_OP_LT; }
4302                 | '>' '='       { $$ = PF_OP_GE; }
4303                 | '>'           { $$ = PF_OP_GT; }
4304                 ;
4305
4306 %%
4307
4308 int
4309 yyerror(const char *fmt, ...)
4310 {
4311         va_list          ap;
4312
4313         file->errors++;
4314         va_start(ap, fmt);
4315         fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4316         vfprintf(stderr, fmt, ap);
4317         fprintf(stderr, "\n");
4318         va_end(ap);
4319         return (0);
4320 }
4321
4322 int
4323 disallow_table(struct node_host *h, const char *fmt)
4324 {
4325         for (; h != NULL; h = h->next)
4326                 if (h->addr.type == PF_ADDR_TABLE) {
4327                         yyerror(fmt, h->addr.v.tblname);
4328                         return (1);
4329                 }
4330         return (0);
4331 }
4332
4333 int
4334 disallow_urpf_failed(struct node_host *h, const char *fmt)
4335 {
4336         for (; h != NULL; h = h->next)
4337                 if (h->addr.type == PF_ADDR_URPFFAILED) {
4338                         yyerror(fmt);
4339                         return (1);
4340                 }
4341         return (0);
4342 }
4343
4344 int
4345 disallow_alias(struct node_host *h, const char *fmt)
4346 {
4347         for (; h != NULL; h = h->next)
4348                 if (DYNIF_MULTIADDR(h->addr)) {
4349                         yyerror(fmt, h->addr.v.tblname);
4350                         return (1);
4351                 }
4352         return (0);
4353 }
4354
4355 int
4356 rule_consistent(struct pf_rule *r, int anchor_call)
4357 {
4358         int     problems = 0;
4359
4360         switch (r->action) {
4361         case PF_PASS:
4362         case PF_DROP:
4363         case PF_SCRUB:
4364         case PF_NOSCRUB:
4365                 problems = filter_consistent(r, anchor_call);
4366                 break;
4367         case PF_NAT:
4368         case PF_NONAT:
4369                 problems = nat_consistent(r);
4370                 break;
4371         case PF_RDR:
4372         case PF_NORDR:
4373                 problems = rdr_consistent(r);
4374                 break;
4375         case PF_BINAT:
4376         case PF_NOBINAT:
4377         default:
4378                 break;
4379         }
4380         return (problems);
4381 }
4382
4383 int
4384 filter_consistent(struct pf_rule *r, int anchor_call)
4385 {
4386         int     problems = 0;
4387
4388         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4389             (r->src.port_op || r->dst.port_op)) {
4390                 yyerror("port only applies to tcp/udp");
4391                 problems++;
4392         }
4393         if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4394             (r->type || r->code)) {
4395                 yyerror("icmp-type/code only applies to icmp");
4396                 problems++;
4397         }
4398         if (!r->af && (r->type || r->code)) {
4399                 yyerror("must indicate address family with icmp-type/code");
4400                 problems++;
4401         }
4402         if (r->overload_tblname[0] &&
4403             r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4404                 yyerror("'overload' requires 'max-src-conn' "
4405                     "or 'max-src-conn-rate'");
4406                 problems++;
4407         }
4408         if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4409             (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4410                 yyerror("proto %s doesn't match address family %s",
4411                     r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4412                     r->af == AF_INET ? "inet" : "inet6");
4413                 problems++;
4414         }
4415         if (r->allow_opts && r->action != PF_PASS) {
4416                 yyerror("allow-opts can only be specified for pass rules");
4417                 problems++;
4418         }
4419         if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4420             r->dst.port_op || r->flagset || r->type || r->code)) {
4421                 yyerror("fragments can be filtered only on IP header fields");
4422                 problems++;
4423         }
4424         if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4425                 yyerror("return-rst can only be applied to TCP rules");
4426                 problems++;
4427         }
4428         if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4429                 yyerror("max-src-nodes requires 'source-track rule'");
4430                 problems++;
4431         }
4432         if (r->action == PF_DROP && r->keep_state) {
4433                 yyerror("keep state on block rules doesn't make sense");
4434                 problems++;
4435         }
4436         if (r->rule_flag & PFRULE_STATESLOPPY &&
4437             (r->keep_state == PF_STATE_MODULATE ||
4438             r->keep_state == PF_STATE_SYNPROXY)) {
4439                 yyerror("sloppy state matching cannot be used with "
4440                     "synproxy state or modulate state");
4441                 problems++;
4442         }
4443         return (-problems);
4444 }
4445
4446 int
4447 nat_consistent(struct pf_rule *r)
4448 {
4449         return (0);     /* yeah! */
4450 }
4451
4452 int
4453 rdr_consistent(struct pf_rule *r)
4454 {
4455         int                      problems = 0;
4456
4457         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
4458                 if (r->src.port_op) {
4459                         yyerror("src port only applies to tcp/udp");
4460                         problems++;
4461                 }
4462                 if (r->dst.port_op) {
4463                         yyerror("dst port only applies to tcp/udp");
4464                         problems++;
4465                 }
4466                 if (r->rpool.proxy_port[0]) {
4467                         yyerror("rpool port only applies to tcp/udp");
4468                         problems++;
4469                 }
4470         }
4471         if (r->dst.port_op &&
4472             r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
4473                 yyerror("invalid port operator for rdr destination port");
4474                 problems++;
4475         }
4476         return (-problems);
4477 }
4478
4479 int
4480 process_tabledef(char *name, struct table_opts *opts)
4481 {
4482         struct pfr_buffer        ab;
4483         struct node_tinit       *ti;
4484
4485         bzero(&ab, sizeof(ab));
4486         ab.pfrb_type = PFRB_ADDRS;
4487         SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4488                 if (ti->file)
4489                         if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
4490                                 if (errno)
4491                                         yyerror("cannot load \"%s\": %s",
4492                                             ti->file, strerror(errno));
4493                                 else
4494                                         yyerror("file \"%s\" contains bad data",
4495                                             ti->file);
4496                                 goto _error;
4497                         }
4498                 if (ti->host)
4499                         if (append_addr_host(&ab, ti->host, 0, 0)) {
4500                                 yyerror("cannot create address buffer: %s",
4501                                     strerror(errno));
4502                                 goto _error;
4503                         }
4504         }
4505         if (pf->opts & PF_OPT_VERBOSE)
4506                 print_tabledef(name, opts->flags, opts->init_addr,
4507                     &opts->init_nodes);
4508         if (!(pf->opts & PF_OPT_NOACTION) &&
4509             pfctl_define_table(name, opts->flags, opts->init_addr,
4510             pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4511                 yyerror("cannot define table %s: %s", name,
4512                     pfr_strerror(errno));
4513                 goto _error;
4514         }
4515         pf->tdirty = 1;
4516         pfr_buf_clear(&ab);
4517         return (0);
4518 _error:
4519         pfr_buf_clear(&ab);
4520         return (-1);
4521 }
4522
4523 struct keywords {
4524         const char      *k_name;
4525         int              k_val;
4526 };
4527
4528 /* macro gore, but you should've seen the prior indentation nightmare... */
4529
4530 #define FREE_LIST(T,r) \
4531         do { \
4532                 T *p, *node = r; \
4533                 while (node != NULL) { \
4534                         p = node; \
4535                         node = node->next; \
4536                         free(p); \
4537                 } \
4538         } while (0)
4539
4540 #define LOOP_THROUGH(T,n,r,C) \
4541         do { \
4542                 T *n; \
4543                 if (r == NULL) { \
4544                         r = calloc(1, sizeof(T)); \
4545                         if (r == NULL) \
4546                                 err(1, "LOOP: calloc"); \
4547                         r->next = NULL; \
4548                 } \
4549                 n = r; \
4550                 while (n != NULL) { \
4551                         do { \
4552                                 C; \
4553                         } while (0); \
4554                         n = n->next; \
4555                 } \
4556         } while (0)
4557
4558 void
4559 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4560 {
4561         char *tmp;
4562         char *p, *q;
4563
4564         if ((tmp = calloc(1, len)) == NULL)
4565                 err(1, "expand_label_str: calloc");
4566         p = q = label;
4567         while ((q = strstr(p, srch)) != NULL) {
4568                 *q = '\0';
4569                 if ((strlcat(tmp, p, len) >= len) ||
4570                     (strlcat(tmp, repl, len) >= len))
4571                         errx(1, "expand_label: label too long");
4572                 q += strlen(srch);
4573                 p = q;
4574         }
4575         if (strlcat(tmp, p, len) >= len)
4576                 errx(1, "expand_label: label too long");
4577         strlcpy(label, tmp, len);       /* always fits */
4578         free(tmp);
4579 }
4580
4581 void
4582 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4583 {
4584         if (strstr(label, name) != NULL) {
4585                 if (!*ifname)
4586                         expand_label_str(label, len, name, "any");
4587                 else
4588                         expand_label_str(label, len, name, ifname);
4589         }
4590 }
4591
4592 void
4593 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
4594     struct node_host *h)
4595 {
4596         char tmp[64], tmp_not[66];
4597
4598         if (strstr(label, name) != NULL) {
4599                 switch (h->addr.type) {
4600                 case PF_ADDR_DYNIFTL:
4601                         snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
4602                         break;
4603                 case PF_ADDR_TABLE:
4604                         snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
4605                         break;
4606                 case PF_ADDR_NOROUTE:
4607                         snprintf(tmp, sizeof(tmp), "no-route");
4608                         break;
4609                 case PF_ADDR_URPFFAILED:
4610                         snprintf(tmp, sizeof(tmp), "urpf-failed");
4611                         break;
4612                 case PF_ADDR_ADDRMASK:
4613                         if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
4614                             PF_AZERO(&h->addr.v.a.mask, af)))
4615                                 snprintf(tmp, sizeof(tmp), "any");
4616                         else {
4617                                 char    a[48];
4618                                 int     bits;
4619
4620                                 if (inet_ntop(af, &h->addr.v.a.addr, a,
4621                                     sizeof(a)) == NULL)
4622                                         snprintf(tmp, sizeof(tmp), "?");
4623                                 else {
4624                                         bits = unmask(&h->addr.v.a.mask, af);
4625                                         if ((af == AF_INET && bits < 32) ||
4626                                             (af == AF_INET6 && bits < 128))
4627                                                 snprintf(tmp, sizeof(tmp),
4628                                                     "%s/%d", a, bits);
4629                                         else
4630                                                 snprintf(tmp, sizeof(tmp),
4631                                                     "%s", a);
4632                                 }
4633                         }
4634                         break;
4635                 default:
4636                         snprintf(tmp, sizeof(tmp), "?");
4637                         break;
4638                 }
4639
4640                 if (h->not) {
4641                         snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
4642                         expand_label_str(label, len, name, tmp_not);
4643                 } else
4644                         expand_label_str(label, len, name, tmp);
4645         }
4646 }
4647
4648 void
4649 expand_label_port(const char *name, char *label, size_t len,
4650     struct node_port *port)
4651 {
4652         char     a1[6], a2[6], op[13] = "";
4653
4654         if (strstr(label, name) != NULL) {
4655                 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
4656                 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
4657                 if (!port->op)
4658                         ;
4659                 else if (port->op == PF_OP_IRG)
4660                         snprintf(op, sizeof(op), "%s><%s", a1, a2);
4661                 else if (port->op == PF_OP_XRG)
4662                         snprintf(op, sizeof(op), "%s<>%s", a1, a2);
4663                 else if (port->op == PF_OP_EQ)
4664                         snprintf(op, sizeof(op), "%s", a1);
4665                 else if (port->op == PF_OP_NE)
4666                         snprintf(op, sizeof(op), "!=%s", a1);
4667                 else if (port->op == PF_OP_LT)
4668                         snprintf(op, sizeof(op), "<%s", a1);
4669                 else if (port->op == PF_OP_LE)
4670                         snprintf(op, sizeof(op), "<=%s", a1);
4671                 else if (port->op == PF_OP_GT)
4672                         snprintf(op, sizeof(op), ">%s", a1);
4673                 else if (port->op == PF_OP_GE)
4674                         snprintf(op, sizeof(op), ">=%s", a1);
4675                 expand_label_str(label, len, name, op);
4676         }
4677 }
4678
4679 void
4680 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
4681 {
4682         struct protoent *pe;
4683         char n[4];
4684
4685         if (strstr(label, name) != NULL) {
4686                 pe = getprotobynumber(proto);
4687                 if (pe != NULL)
4688                         expand_label_str(label, len, name, pe->p_name);
4689                 else {
4690                         snprintf(n, sizeof(n), "%u", proto);
4691                         expand_label_str(label, len, name, n);
4692                 }
4693         }
4694 }
4695
4696 void
4697 expand_label_nr(const char *name, char *label, size_t len)
4698 {
4699         char n[11];
4700
4701         if (strstr(label, name) != NULL) {
4702                 snprintf(n, sizeof(n), "%u", pf->anchor->match);
4703                 expand_label_str(label, len, name, n);
4704         }
4705 }
4706
4707 void
4708 expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
4709     struct node_host *src_host, struct node_port *src_port,
4710     struct node_host *dst_host, struct node_port *dst_port,
4711     u_int8_t proto)
4712 {
4713         expand_label_if("$if", label, len, ifname);
4714         expand_label_addr("$srcaddr", label, len, af, src_host);
4715         expand_label_addr("$dstaddr", label, len, af, dst_host);
4716         expand_label_port("$srcport", label, len, src_port);
4717         expand_label_port("$dstport", label, len, dst_port);
4718         expand_label_proto("$proto", label, len, proto);
4719         expand_label_nr("$nr", label, len);
4720 }
4721
4722 int
4723 expand_altq(struct pf_altq *a, struct node_if *interfaces,
4724     struct node_queue *nqueues, struct node_queue_bw bwspec,
4725     struct node_queue_opt *opts)
4726 {
4727         struct pf_altq           pa, pb;
4728         char                     qname[PF_QNAME_SIZE];
4729         struct node_queue       *n;
4730         struct node_queue_bw     bw;
4731         int                      errs = 0;
4732
4733         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4734                 FREE_LIST(struct node_if, interfaces);
4735                 FREE_LIST(struct node_queue, nqueues);
4736                 return (0);
4737         }
4738
4739         LOOP_THROUGH(struct node_if, interface, interfaces,
4740                 memcpy(&pa, a, sizeof(struct pf_altq));
4741                 if (strlcpy(pa.ifname, interface->ifname,
4742                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4743                         errx(1, "expand_altq: strlcpy");
4744
4745                 if (interface->not) {
4746                         yyerror("altq on ! <interface> is not supported");
4747                         errs++;
4748                 } else {
4749                         if (eval_pfaltq(pf, &pa, &bwspec, opts))
4750                                 errs++;
4751                         else
4752                                 if (pfctl_add_altq(pf, &pa))
4753                                         errs++;
4754
4755                         if (pf->opts & PF_OPT_VERBOSE) {
4756                                 print_altq(&pf->paltq->altq, 0,
4757                                     &bwspec, opts);
4758                                 if (nqueues && nqueues->tail) {
4759                                         printf("queue { ");
4760                                         LOOP_THROUGH(struct node_queue, queue,
4761                                             nqueues,
4762                                                 printf("%s ",
4763                                                     queue->queue);
4764                                         );
4765                                         printf("}");
4766                                 }
4767                                 printf("\n");
4768                         }
4769
4770                         if (pa.scheduler == ALTQT_CBQ ||
4771                             pa.scheduler == ALTQT_HFSC) {
4772                                 /* now create a root queue */
4773                                 memset(&pb, 0, sizeof(struct pf_altq));
4774                                 if (strlcpy(qname, "root_", sizeof(qname)) >=
4775                                     sizeof(qname))
4776                                         errx(1, "expand_altq: strlcpy");
4777                                 if (strlcat(qname, interface->ifname,
4778                                     sizeof(qname)) >= sizeof(qname))
4779                                         errx(1, "expand_altq: strlcat");
4780                                 if (strlcpy(pb.qname, qname,
4781                                     sizeof(pb.qname)) >= sizeof(pb.qname))
4782                                         errx(1, "expand_altq: strlcpy");
4783                                 if (strlcpy(pb.ifname, interface->ifname,
4784                                     sizeof(pb.ifname)) >= sizeof(pb.ifname))
4785                                         errx(1, "expand_altq: strlcpy");
4786                                 pb.qlimit = pa.qlimit;
4787                                 pb.scheduler = pa.scheduler;
4788                                 bw.bw_absolute = pa.ifbandwidth;
4789                                 bw.bw_percent = 0;
4790                                 if (eval_pfqueue(pf, &pb, &bw, opts))
4791                                         errs++;
4792                                 else
4793                                         if (pfctl_add_altq(pf, &pb))
4794                                                 errs++;
4795                         }
4796
4797                         LOOP_THROUGH(struct node_queue, queue, nqueues,
4798                                 n = calloc(1, sizeof(struct node_queue));
4799                                 if (n == NULL)
4800                                         err(1, "expand_altq: calloc");
4801                                 if (pa.scheduler == ALTQT_CBQ ||
4802                                     pa.scheduler == ALTQT_HFSC)
4803                                         if (strlcpy(n->parent, qname,
4804                                             sizeof(n->parent)) >=
4805                                             sizeof(n->parent))
4806                                                 errx(1, "expand_altq: strlcpy");
4807                                 if (strlcpy(n->queue, queue->queue,
4808                                     sizeof(n->queue)) >= sizeof(n->queue))
4809                                         errx(1, "expand_altq: strlcpy");
4810                                 if (strlcpy(n->ifname, interface->ifname,
4811                                     sizeof(n->ifname)) >= sizeof(n->ifname))
4812                                         errx(1, "expand_altq: strlcpy");
4813                                 n->scheduler = pa.scheduler;
4814                                 n->next = NULL;
4815                                 n->tail = n;
4816                                 if (queues == NULL)
4817                                         queues = n;
4818                                 else {
4819                                         queues->tail->next = n;
4820                                         queues->tail = n;
4821                                 }
4822                         );
4823                 }
4824         );
4825         FREE_LIST(struct node_if, interfaces);
4826         FREE_LIST(struct node_queue, nqueues);
4827
4828         return (errs);
4829 }
4830
4831 int
4832 expand_queue(struct pf_altq *a, struct node_if *interfaces,
4833     struct node_queue *nqueues, struct node_queue_bw bwspec,
4834     struct node_queue_opt *opts)
4835 {
4836         struct node_queue       *n, *nq;
4837         struct pf_altq           pa;
4838         u_int8_t                 found = 0;
4839         u_int8_t                 errs = 0;
4840
4841         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4842                 FREE_LIST(struct node_queue, nqueues);
4843                 return (0);
4844         }
4845
4846         if (queues == NULL) {
4847                 yyerror("queue %s has no parent", a->qname);
4848                 FREE_LIST(struct node_queue, nqueues);
4849                 return (1);
4850         }
4851
4852         LOOP_THROUGH(struct node_if, interface, interfaces,
4853                 LOOP_THROUGH(struct node_queue, tqueue, queues,
4854                         if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
4855                             (interface->ifname[0] == 0 ||
4856                             (!interface->not && !strncmp(interface->ifname,
4857                             tqueue->ifname, IFNAMSIZ)) ||
4858                             (interface->not && strncmp(interface->ifname,
4859                             tqueue->ifname, IFNAMSIZ)))) {
4860                                 /* found ourself in queues */
4861                                 found++;
4862
4863                                 memcpy(&pa, a, sizeof(struct pf_altq));
4864
4865                                 if (pa.scheduler != ALTQT_NONE &&
4866                                     pa.scheduler != tqueue->scheduler) {
4867                                         yyerror("exactly one scheduler type "
4868                                             "per interface allowed");
4869                                         return (1);
4870                                 }
4871                                 pa.scheduler = tqueue->scheduler;
4872
4873                                 /* scheduler dependent error checking */
4874                                 switch (pa.scheduler) {
4875                                 case ALTQT_PRIQ:
4876                                         if (nqueues != NULL) {
4877                                                 yyerror("priq queues cannot "
4878                                                     "have child queues");
4879                                                 return (1);
4880                                         }
4881                                         if (bwspec.bw_absolute > 0 ||
4882                                             bwspec.bw_percent < 100) {
4883                                                 yyerror("priq doesn't take "
4884                                                     "bandwidth");
4885                                                 return (1);
4886                                         }
4887                                         break;
4888                                 default:
4889                                         break;
4890                                 }
4891
4892                                 if (strlcpy(pa.ifname, tqueue->ifname,
4893                                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4894                                         errx(1, "expand_queue: strlcpy");
4895                                 if (strlcpy(pa.parent, tqueue->parent,
4896                                     sizeof(pa.parent)) >= sizeof(pa.parent))
4897                                         errx(1, "expand_queue: strlcpy");
4898
4899                                 if (eval_pfqueue(pf, &pa, &bwspec, opts))
4900                                         errs++;
4901                                 else
4902                                         if (pfctl_add_altq(pf, &pa))
4903                                                 errs++;
4904
4905                                 for (nq = nqueues; nq != NULL; nq = nq->next) {
4906                                         if (!strcmp(a->qname, nq->queue)) {
4907                                                 yyerror("queue cannot have "
4908                                                     "itself as child");
4909                                                 errs++;
4910                                                 continue;
4911                                         }
4912                                         n = calloc(1,
4913                                             sizeof(struct node_queue));
4914                                         if (n == NULL)
4915                                                 err(1, "expand_queue: calloc");
4916                                         if (strlcpy(n->parent, a->qname,
4917                                             sizeof(n->parent)) >=
4918                                             sizeof(n->parent))
4919                                                 errx(1, "expand_queue strlcpy");
4920                                         if (strlcpy(n->queue, nq->queue,
4921                                             sizeof(n->queue)) >=
4922                                             sizeof(n->queue))
4923                                                 errx(1, "expand_queue strlcpy");
4924                                         if (strlcpy(n->ifname, tqueue->ifname,
4925                                             sizeof(n->ifname)) >=
4926                                             sizeof(n->ifname))
4927                                                 errx(1, "expand_queue strlcpy");
4928                                         n->scheduler = tqueue->scheduler;
4929                                         n->next = NULL;
4930                                         n->tail = n;
4931                                         if (queues == NULL)
4932                                                 queues = n;
4933                                         else {
4934                                                 queues->tail->next = n;
4935                                                 queues->tail = n;
4936                                         }
4937                                 }
4938                                 if ((pf->opts & PF_OPT_VERBOSE) && (
4939                                     (found == 1 && interface->ifname[0] == 0) ||
4940                                     (found > 0 && interface->ifname[0] != 0))) {
4941                                         print_queue(&pf->paltq->altq, 0,
4942                                             &bwspec, interface->ifname[0] != 0,
4943                                             opts);
4944                                         if (nqueues && nqueues->tail) {
4945                                                 printf("{ ");
4946                                                 LOOP_THROUGH(struct node_queue,
4947                                                     queue, nqueues,
4948                                                         printf("%s ",
4949                                                             queue->queue);
4950                                                 );
4951                                                 printf("}");
4952                                         }
4953                                         printf("\n");
4954                                 }
4955                         }
4956                 );
4957         );
4958
4959         FREE_LIST(struct node_queue, nqueues);
4960         FREE_LIST(struct node_if, interfaces);
4961
4962         if (!found) {
4963                 yyerror("queue %s has no parent", a->qname);
4964                 errs++;
4965         }
4966
4967         if (errs)
4968                 return (1);
4969         else
4970                 return (0);
4971 }
4972
4973 void
4974 expand_rule(struct pf_rule *r,
4975     struct node_if *interfaces, struct node_host *rpool_hosts,
4976     struct node_proto *protos, struct node_os *src_oses,
4977     struct node_host *src_hosts, struct node_port *src_ports,
4978     struct node_host *dst_hosts, struct node_port *dst_ports,
4979     struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types,
4980     const char *anchor_call)
4981 {
4982         sa_family_t              af = r->af;
4983         int                      added = 0, error = 0;
4984         char                     ifname[IF_NAMESIZE];
4985         char                     label[PF_RULE_LABEL_SIZE];
4986         char                     tagname[PF_TAG_NAME_SIZE];
4987         char                     match_tagname[PF_TAG_NAME_SIZE];
4988         struct pf_pooladdr      *pa;
4989         struct node_host        *h;
4990         u_int8_t                 flags, flagset, keep_state;
4991
4992         if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
4993                 errx(1, "expand_rule: strlcpy");
4994         if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
4995                 errx(1, "expand_rule: strlcpy");
4996         if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
4997             sizeof(match_tagname))
4998                 errx(1, "expand_rule: strlcpy");
4999         flags = r->flags;
5000         flagset = r->flagset;
5001         keep_state = r->keep_state;
5002
5003         LOOP_THROUGH(struct node_if, interface, interfaces,
5004         LOOP_THROUGH(struct node_proto, proto, protos,
5005         LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
5006         LOOP_THROUGH(struct node_host, src_host, src_hosts,
5007         LOOP_THROUGH(struct node_port, src_port, src_ports,
5008         LOOP_THROUGH(struct node_os, src_os, src_oses,
5009         LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
5010         LOOP_THROUGH(struct node_port, dst_port, dst_ports,
5011         LOOP_THROUGH(struct node_uid, uid, uids,
5012         LOOP_THROUGH(struct node_gid, gid, gids,
5013
5014                 r->af = af;
5015                 /* for link-local IPv6 address, interface must match up */
5016                 if ((r->af && src_host->af && r->af != src_host->af) ||
5017                     (r->af && dst_host->af && r->af != dst_host->af) ||
5018                     (src_host->af && dst_host->af &&
5019                     src_host->af != dst_host->af) ||
5020                     (src_host->ifindex && dst_host->ifindex &&
5021                     src_host->ifindex != dst_host->ifindex) ||
5022                     (src_host->ifindex && *interface->ifname &&
5023                     src_host->ifindex != if_nametoindex(interface->ifname)) ||
5024                     (dst_host->ifindex && *interface->ifname &&
5025                     dst_host->ifindex != if_nametoindex(interface->ifname)))
5026                         continue;
5027                 if (!r->af && src_host->af)
5028                         r->af = src_host->af;
5029                 else if (!r->af && dst_host->af)
5030                         r->af = dst_host->af;
5031
5032                 if (*interface->ifname)
5033                         strlcpy(r->ifname, interface->ifname,
5034                             sizeof(r->ifname));
5035                 else if (if_indextoname(src_host->ifindex, ifname))
5036                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5037                 else if (if_indextoname(dst_host->ifindex, ifname))
5038                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5039                 else
5040                         memset(r->ifname, '\0', sizeof(r->ifname));
5041
5042                 if (strlcpy(r->label, label, sizeof(r->label)) >=
5043                     sizeof(r->label))
5044                         errx(1, "expand_rule: strlcpy");
5045                 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
5046                     sizeof(r->tagname))
5047                         errx(1, "expand_rule: strlcpy");
5048                 if (strlcpy(r->match_tagname, match_tagname,
5049                     sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
5050                         errx(1, "expand_rule: strlcpy");
5051                 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
5052                     src_host, src_port, dst_host, dst_port, proto->proto);
5053                 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
5054                     src_host, src_port, dst_host, dst_port, proto->proto);
5055                 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
5056                     r->af, src_host, src_port, dst_host, dst_port,
5057                     proto->proto);
5058
5059                 error += check_netmask(src_host, r->af);
5060                 error += check_netmask(dst_host, r->af);
5061
5062                 r->ifnot = interface->not;
5063                 r->proto = proto->proto;
5064                 r->src.addr = src_host->addr;
5065                 r->src.neg = src_host->not;
5066                 r->src.port[0] = src_port->port[0];
5067                 r->src.port[1] = src_port->port[1];
5068                 r->src.port_op = src_port->op;
5069                 r->dst.addr = dst_host->addr;
5070                 r->dst.neg = dst_host->not;
5071                 r->dst.port[0] = dst_port->port[0];
5072                 r->dst.port[1] = dst_port->port[1];
5073                 r->dst.port_op = dst_port->op;
5074                 r->uid.op = uid->op;
5075                 r->uid.uid[0] = uid->uid[0];
5076                 r->uid.uid[1] = uid->uid[1];
5077                 r->gid.op = gid->op;
5078                 r->gid.gid[0] = gid->gid[0];
5079                 r->gid.gid[1] = gid->gid[1];
5080                 r->type = icmp_type->type;
5081                 r->code = icmp_type->code;
5082
5083                 if ((keep_state == PF_STATE_MODULATE ||
5084                     keep_state == PF_STATE_SYNPROXY) &&
5085                     r->proto && r->proto != IPPROTO_TCP)
5086                         r->keep_state = PF_STATE_NORMAL;
5087                 else
5088                         r->keep_state = keep_state;
5089
5090                 if (r->proto && r->proto != IPPROTO_TCP) {
5091                         r->flags = 0;
5092                         r->flagset = 0;
5093                 } else {
5094                         r->flags = flags;
5095                         r->flagset = flagset;
5096                 }
5097                 if (icmp_type->proto && r->proto != icmp_type->proto) {
5098                         yyerror("icmp-type mismatch");
5099                         error++;
5100                 }
5101
5102                 if (src_os && src_os->os) {
5103                         r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5104                         if ((pf->opts & PF_OPT_VERBOSE2) &&
5105                             r->os_fingerprint == PF_OSFP_NOMATCH)
5106                                 fprintf(stderr,
5107                                     "warning: unknown '%s' OS fingerprint\n",
5108                                     src_os->os);
5109                 } else {
5110                         r->os_fingerprint = PF_OSFP_ANY;
5111                 }
5112
5113                 TAILQ_INIT(&r->rpool.list);
5114                 for (h = rpool_hosts; h != NULL; h = h->next) {
5115                         pa = calloc(1, sizeof(struct pf_pooladdr));
5116                         if (pa == NULL)
5117                                 err(1, "expand_rule: calloc");
5118                         pa->addr = h->addr;
5119                         if (h->ifname != NULL) {
5120                                 if (strlcpy(pa->ifname, h->ifname,
5121                                     sizeof(pa->ifname)) >=
5122                                     sizeof(pa->ifname))
5123                                         errx(1, "expand_rule: strlcpy");
5124                         } else
5125                                 pa->ifname[0] = 0;
5126                         TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
5127                 }
5128
5129                 if (rule_consistent(r, anchor_call[0]) < 0 || error)
5130                         yyerror("skipping rule due to errors");
5131                 else {
5132                         r->nr = pf->astack[pf->asd]->match++;
5133                         pfctl_add_rule(pf, r, anchor_call);
5134                         added++;
5135                 }
5136
5137         ))))))))));
5138
5139         FREE_LIST(struct node_if, interfaces);
5140         FREE_LIST(struct node_proto, protos);
5141         FREE_LIST(struct node_host, src_hosts);
5142         FREE_LIST(struct node_port, src_ports);
5143         FREE_LIST(struct node_os, src_oses);
5144         FREE_LIST(struct node_host, dst_hosts);
5145         FREE_LIST(struct node_port, dst_ports);
5146         FREE_LIST(struct node_uid, uids);
5147         FREE_LIST(struct node_gid, gids);
5148         FREE_LIST(struct node_icmp, icmp_types);
5149         FREE_LIST(struct node_host, rpool_hosts);
5150
5151         if (!added)
5152                 yyerror("rule expands to no valid combination");
5153 }
5154
5155 int
5156 expand_skip_interface(struct node_if *interfaces)
5157 {
5158         int     errs = 0;
5159
5160         if (!interfaces || (!interfaces->next && !interfaces->not &&
5161             !strcmp(interfaces->ifname, "none"))) {
5162                 if (pf->opts & PF_OPT_VERBOSE)
5163                         printf("set skip on none\n");
5164                 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
5165                 return (errs);
5166         }
5167
5168         if (pf->opts & PF_OPT_VERBOSE)
5169                 printf("set skip on {");
5170         LOOP_THROUGH(struct node_if, interface, interfaces,
5171                 if (pf->opts & PF_OPT_VERBOSE)
5172                         printf(" %s", interface->ifname);
5173                 if (interface->not) {
5174                         yyerror("skip on ! <interface> is not supported");
5175                         errs++;
5176                 } else
5177                         errs += pfctl_set_interface_flags(pf,
5178                             interface->ifname, PFI_IFLAG_SKIP, 1);
5179         );
5180         if (pf->opts & PF_OPT_VERBOSE)
5181                 printf(" }\n");
5182
5183         FREE_LIST(struct node_if, interfaces);
5184
5185         if (errs)
5186                 return (1);
5187         else
5188                 return (0);
5189 }
5190
5191 #undef FREE_LIST
5192 #undef LOOP_THROUGH
5193
5194 int
5195 check_rulestate(int desired_state)
5196 {
5197         if (require_order && (rulestate > desired_state)) {
5198                 yyerror("Rules must be in order: options, normalization, "
5199                     "queueing, translation, filtering");
5200                 return (1);
5201         }
5202         rulestate = desired_state;
5203         return (0);
5204 }
5205
5206 int
5207 kw_cmp(const void *k, const void *e)
5208 {
5209         return (strcmp(k, ((const struct keywords *)e)->k_name));
5210 }
5211
5212 int
5213 lookup(char *s)
5214 {
5215         /* this has to be sorted always */
5216         static const struct keywords keywords[] = {
5217                 { "all",                ALL},
5218                 { "allow-opts",         ALLOWOPTS},
5219                 { "altq",               ALTQ},
5220                 { "anchor",             ANCHOR},
5221                 { "antispoof",          ANTISPOOF},
5222                 { "any",                ANY},
5223                 { "bandwidth",          BANDWIDTH},
5224                 { "binat",              BINAT},
5225                 { "binat-anchor",       BINATANCHOR},
5226                 { "bitmask",            BITMASK},
5227                 { "block",              BLOCK},
5228                 { "block-policy",       BLOCKPOLICY},
5229                 { "cbq",                CBQ},
5230                 { "code",               CODE},
5231                 { "crop",               FRAGCROP},
5232                 { "debug",              DEBUG},
5233                 { "divert-reply",       DIVERTREPLY},
5234                 { "divert-to",          DIVERTTO},
5235                 { "drop",               DROP},
5236                 { "drop-ovl",           FRAGDROP},
5237                 { "dup-to",             DUPTO},
5238                 { "fastroute",          FASTROUTE},
5239                 { "file",               FILENAME},
5240                 { "fingerprints",       FINGERPRINTS},
5241                 { "flags",              FLAGS},
5242                 { "floating",           FLOATING},
5243                 { "flush",              FLUSH},
5244                 { "for",                FOR},
5245                 { "fragment",           FRAGMENT},
5246                 { "from",               FROM},
5247                 { "global",             GLOBAL},
5248                 { "group",              GROUP},
5249                 { "hfsc",               HFSC},
5250                 { "hostid",             HOSTID},
5251                 { "icmp-type",          ICMPTYPE},
5252                 { "icmp6-type",         ICMP6TYPE},
5253                 { "if-bound",           IFBOUND},
5254                 { "in",                 IN},
5255                 { "include",            INCLUDE},
5256                 { "inet",               INET},
5257                 { "inet6",              INET6},
5258                 { "keep",               KEEP},
5259                 { "label",              LABEL},
5260                 { "limit",              LIMIT},
5261                 { "linkshare",          LINKSHARE},
5262                 { "load",               LOAD},
5263                 { "log",                LOG},
5264                 { "loginterface",       LOGINTERFACE},
5265                 { "max",                MAXIMUM},
5266                 { "max-mss",            MAXMSS},
5267                 { "max-src-conn",       MAXSRCCONN},
5268                 { "max-src-conn-rate",  MAXSRCCONNRATE},
5269                 { "max-src-nodes",      MAXSRCNODES},
5270                 { "max-src-states",     MAXSRCSTATES},
5271                 { "min-ttl",            MINTTL},
5272                 { "modulate",           MODULATE},
5273                 { "nat",                NAT},
5274                 { "nat-anchor",         NATANCHOR},
5275                 { "no",                 NO},
5276                 { "no-df",              NODF},
5277                 { "no-route",           NOROUTE},
5278                 { "no-sync",            NOSYNC},
5279                 { "on",                 ON},
5280                 { "optimization",       OPTIMIZATION},
5281                 { "os",                 OS},
5282                 { "out",                OUT},
5283                 { "overload",           OVERLOAD},
5284                 { "pass",               PASS},
5285                 { "port",               PORT},
5286                 { "priority",           PRIORITY},
5287                 { "priq",               PRIQ},
5288                 { "probability",        PROBABILITY},
5289                 { "proto",              PROTO},
5290                 { "qlimit",             QLIMIT},
5291                 { "queue",              QUEUE},
5292                 { "quick",              QUICK},
5293                 { "random",             RANDOM},
5294                 { "random-id",          RANDOMID},
5295                 { "rdr",                RDR},
5296                 { "rdr-anchor",         RDRANCHOR},
5297                 { "realtime",           REALTIME},
5298                 { "reassemble",         REASSEMBLE},
5299                 { "reply-to",           REPLYTO},
5300                 { "require-order",      REQUIREORDER},
5301                 { "return",             RETURN},
5302                 { "return-icmp",        RETURNICMP},
5303                 { "return-icmp6",       RETURNICMP6},
5304                 { "return-rst",         RETURNRST},
5305                 { "round-robin",        ROUNDROBIN},
5306                 { "route",              ROUTE},
5307                 { "route-to",           ROUTETO},
5308                 { "rtable",             RTABLE},
5309                 { "rule",               RULE},
5310                 { "ruleset-optimization",       RULESET_OPTIMIZATION},
5311                 { "scrub",              SCRUB},
5312                 { "set",                SET},
5313                 { "set-tos",            SETTOS},
5314                 { "skip",               SKIP},
5315                 { "sloppy",             SLOPPY},
5316                 { "source-hash",        SOURCEHASH},
5317                 { "source-track",       SOURCETRACK},
5318                 { "state",              STATE},
5319                 { "state-defaults",     STATEDEFAULTS},
5320                 { "state-policy",       STATEPOLICY},
5321                 { "static-port",        STATICPORT},
5322                 { "sticky-address",     STICKYADDRESS},
5323                 { "synproxy",           SYNPROXY},
5324                 { "table",              TABLE},
5325                 { "tag",                TAG},
5326                 { "tagged",             TAGGED},
5327                 { "tbrsize",            TBRSIZE},
5328                 { "timeout",            TIMEOUT},
5329                 { "to",                 TO},
5330                 { "tos",                TOS},
5331                 { "ttl",                TTL},
5332                 { "upperlimit",         UPPERLIMIT},
5333                 { "urpf-failed",        URPFFAILED},
5334                 { "user",               USER},
5335         };
5336         const struct keywords   *p;
5337
5338         p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5339             sizeof(keywords[0]), kw_cmp);
5340
5341         if (p) {
5342                 if (debug > 1)
5343                         fprintf(stderr, "%s: %d\n", s, p->k_val);
5344                 return (p->k_val);
5345         } else {
5346                 if (debug > 1)
5347                         fprintf(stderr, "string: %s\n", s);
5348                 return (STRING);
5349         }
5350 }
5351
5352 #define MAXPUSHBACK     128
5353
5354 char    *parsebuf;
5355 int      parseindex;
5356 char     pushback_buffer[MAXPUSHBACK];
5357 int      pushback_index = 0;
5358
5359 int
5360 lgetc(int quotec)
5361 {
5362         int             c, next;
5363
5364         if (parsebuf) {
5365                 /* Read character from the parsebuffer instead of input. */
5366                 if (parseindex >= 0) {
5367                         c = parsebuf[parseindex++];
5368                         if (c != '\0')
5369                                 return (c);
5370                         parsebuf = NULL;
5371                 } else
5372                         parseindex++;
5373         }
5374
5375         if (pushback_index)
5376                 return (pushback_buffer[--pushback_index]);
5377
5378         if (quotec) {
5379                 if ((c = getc(file->stream)) == EOF) {
5380                         yyerror("reached end of file while parsing quoted string");
5381                         if (popfile() == EOF)
5382                                 return (EOF);
5383                         return (quotec);
5384                 }
5385                 return (c);
5386         }
5387
5388         while ((c = getc(file->stream)) == '\\') {
5389                 next = getc(file->stream);
5390                 if (next != '\n') {
5391                         c = next;
5392                         break;
5393                 }
5394                 yylval.lineno = file->lineno;
5395                 file->lineno++;
5396         }
5397
5398         while (c == EOF) {
5399                 if (popfile() == EOF)
5400                         return (EOF);
5401                 c = getc(file->stream);
5402         }
5403         return (c);
5404 }
5405
5406 int
5407 lungetc(int c)
5408 {
5409         if (c == EOF)
5410                 return (EOF);
5411         if (parsebuf) {
5412                 parseindex--;
5413                 if (parseindex >= 0)
5414                         return (c);
5415         }
5416         if (pushback_index < MAXPUSHBACK-1)
5417                 return (pushback_buffer[pushback_index++] = c);
5418         else
5419                 return (EOF);
5420 }
5421
5422 int
5423 findeol(void)
5424 {
5425         int     c;
5426
5427         parsebuf = NULL;
5428
5429         /* skip to either EOF or the first real EOL */
5430         while (1) {
5431                 if (pushback_index)
5432                         c = pushback_buffer[--pushback_index];
5433                 else
5434                         c = lgetc(0);
5435                 if (c == '\n') {
5436                         file->lineno++;
5437                         break;
5438                 }
5439                 if (c == EOF)
5440                         break;
5441         }
5442         return (ERROR);
5443 }
5444
5445 int
5446 yylex(void)
5447 {
5448         char     buf[8096];
5449         char    *p, *val;
5450         int      quotec, next, c;
5451         int      token;
5452
5453 top:
5454         p = buf;
5455         while ((c = lgetc(0)) == ' ' || c == '\t')
5456                 ; /* nothing */
5457
5458         yylval.lineno = file->lineno;
5459         if (c == '#')
5460                 while ((c = lgetc(0)) != '\n' && c != EOF)
5461                         ; /* nothing */
5462         if (c == '$' && parsebuf == NULL) {
5463                 while (1) {
5464                         if ((c = lgetc(0)) == EOF)
5465                                 return (0);
5466
5467                         if (p + 1 >= buf + sizeof(buf) - 1) {
5468                                 yyerror("string too long");
5469                                 return (findeol());
5470                         }
5471                         if (isalnum(c) || c == '_') {
5472                                 *p++ = (char)c;
5473                                 continue;
5474                         }
5475                         *p = '\0';
5476                         lungetc(c);
5477                         break;
5478                 }
5479                 val = symget(buf);
5480                 if (val == NULL) {
5481                         yyerror("macro '%s' not defined", buf);
5482                         return (findeol());
5483                 }
5484                 parsebuf = val;
5485                 parseindex = 0;
5486                 goto top;
5487         }
5488
5489         switch (c) {
5490         case '\'':
5491         case '"':
5492                 quotec = c;
5493                 while (1) {
5494                         if ((c = lgetc(quotec)) == EOF)
5495                                 return (0);
5496                         if (c == '\n') {
5497                                 file->lineno++;
5498                                 continue;
5499                         } else if (c == '\\') {
5500                                 if ((next = lgetc(quotec)) == EOF)
5501                                         return (0);
5502                                 if (next == quotec || c == ' ' || c == '\t')
5503                                         c = next;
5504                                 else if (next == '\n')
5505                                         continue;
5506                                 else
5507                                         lungetc(next);
5508                         } else if (c == quotec) {
5509                                 *p = '\0';
5510                                 break;
5511                         }
5512                         if (p + 1 >= buf + sizeof(buf) - 1) {
5513                                 yyerror("string too long");
5514                                 return (findeol());
5515                         }
5516                         *p++ = (char)c;
5517                 }
5518                 yylval.v.string = strdup(buf);
5519                 if (yylval.v.string == NULL)
5520                         err(1, "yylex: strdup");
5521                 return (STRING);
5522         case '<':
5523                 next = lgetc(0);
5524                 if (next == '>') {
5525                         yylval.v.i = PF_OP_XRG;
5526                         return (PORTBINARY);
5527                 }
5528                 lungetc(next);
5529                 break;
5530         case '>':
5531                 next = lgetc(0);
5532                 if (next == '<') {
5533                         yylval.v.i = PF_OP_IRG;
5534                         return (PORTBINARY);
5535                 }
5536                 lungetc(next);
5537                 break;
5538         case '-':
5539                 next = lgetc(0);
5540                 if (next == '>')
5541                         return (ARROW);
5542                 lungetc(next);
5543                 break;
5544         }
5545
5546 #define allowed_to_end_number(x) \
5547         (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5548
5549         if (c == '-' || isdigit(c)) {
5550                 do {
5551                         *p++ = c;
5552                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5553                                 yyerror("string too long");
5554                                 return (findeol());
5555                         }
5556                 } while ((c = lgetc(0)) != EOF && isdigit(c));
5557                 lungetc(c);
5558                 if (p == buf + 1 && buf[0] == '-')
5559                         goto nodigits;
5560                 if (c == EOF || allowed_to_end_number(c)) {
5561                         const char *errstr = NULL;
5562
5563                         *p = '\0';
5564                         yylval.v.number = strtonum(buf, LLONG_MIN,
5565                             LLONG_MAX, &errstr);
5566                         if (errstr) {
5567                                 yyerror("\"%s\" invalid number: %s",
5568                                     buf, errstr);
5569                                 return (findeol());
5570                         }
5571                         return (NUMBER);
5572                 } else {
5573 nodigits:
5574                         while (p > buf + 1)
5575                                 lungetc(*--p);
5576                         c = *--p;
5577                         if (c == '-')
5578                                 return (c);
5579                 }
5580         }
5581
5582 #define allowed_in_string(x) \
5583         (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
5584         x != '{' && x != '}' && x != '<' && x != '>' && \
5585         x != '!' && x != '=' && x != '/' && x != '#' && \
5586         x != ','))
5587
5588         if (isalnum(c) || c == ':' || c == '_') {
5589                 do {
5590                         *p++ = c;
5591                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5592                                 yyerror("string too long");
5593                                 return (findeol());
5594                         }
5595                 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
5596                 lungetc(c);
5597                 *p = '\0';
5598                 if ((token = lookup(buf)) == STRING)
5599                         if ((yylval.v.string = strdup(buf)) == NULL)
5600                                 err(1, "yylex: strdup");
5601                 return (token);
5602         }
5603         if (c == '\n') {
5604                 yylval.lineno = file->lineno;
5605                 file->lineno++;
5606         }
5607         if (c == EOF)
5608                 return (0);
5609         return (c);
5610 }
5611
5612 int
5613 check_file_secrecy(int fd, const char *fname)
5614 {
5615         struct stat     st;
5616
5617         if (fstat(fd, &st)) {
5618                 warn("cannot stat %s", fname);
5619                 return (-1);
5620         }
5621         if (st.st_uid != 0 && st.st_uid != getuid()) {
5622                 warnx("%s: owner not root or current user", fname);
5623                 return (-1);
5624         }
5625         if (st.st_mode & (S_IRWXG | S_IRWXO)) {
5626                 warnx("%s: group/world readable/writeable", fname);
5627                 return (-1);
5628         }
5629         return (0);
5630 }
5631
5632 struct file *
5633 pushfile(const char *name, int secret)
5634 {
5635         struct file     *nfile;
5636
5637         if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
5638             (nfile->name = strdup(name)) == NULL) {
5639                 warn("malloc");
5640                 return (NULL);
5641         }
5642         if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
5643                 nfile->stream = stdin;
5644                 free(nfile->name);
5645                 if ((nfile->name = strdup("stdin")) == NULL) {
5646                         warn("strdup");
5647                         free(nfile);
5648                         return (NULL);
5649                 }
5650         } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
5651                 warn("%s", nfile->name);
5652                 free(nfile->name);
5653                 free(nfile);
5654                 return (NULL);
5655         } else if (secret &&
5656             check_file_secrecy(fileno(nfile->stream), nfile->name)) {
5657                 fclose(nfile->stream);
5658                 free(nfile->name);
5659                 free(nfile);
5660                 return (NULL);
5661         }
5662         nfile->lineno = 1;
5663         TAILQ_INSERT_TAIL(&files, nfile, entry);
5664         return (nfile);
5665 }
5666
5667 int
5668 popfile(void)
5669 {
5670         struct file     *prev;
5671
5672         if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
5673                 prev->errors += file->errors;
5674                 TAILQ_REMOVE(&files, file, entry);
5675                 fclose(file->stream);
5676                 free(file->name);
5677                 free(file);
5678                 file = prev;
5679                 return (0);
5680         }
5681         return (EOF);
5682 }
5683
5684 int
5685 parse_config(char *filename, struct pfctl *xpf)
5686 {
5687         int              errors = 0;
5688         struct sym      *sym;
5689
5690         pf = xpf;
5691         errors = 0;
5692         rulestate = PFCTL_STATE_NONE;
5693         returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
5694         returnicmp6default =
5695             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
5696         blockpolicy = PFRULE_DROP;
5697         require_order = 1;
5698
5699         if ((file = pushfile(filename, 0)) == NULL) {
5700                 warn("cannot open the main config file!");
5701                 return (-1);
5702         }
5703
5704         yyparse();
5705         errors = file->errors;
5706         popfile();
5707
5708         /* Free macros and check which have not been used. */
5709         while ((sym = TAILQ_FIRST(&symhead))) {
5710                 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
5711                         fprintf(stderr, "warning: macro '%s' not "
5712                             "used\n", sym->nam);
5713                 free(sym->nam);
5714                 free(sym->val);
5715                 TAILQ_REMOVE(&symhead, sym, entry);
5716                 free(sym);
5717         }
5718
5719         return (errors ? -1 : 0);
5720 }
5721
5722 int
5723 symset(const char *nam, const char *val, int persist)
5724 {
5725         struct sym      *sym;
5726
5727         for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
5728             sym = TAILQ_NEXT(sym, entry))
5729                 ;       /* nothing */
5730
5731         if (sym != NULL) {
5732                 if (sym->persist == 1)
5733                         return (0);
5734                 else {
5735                         free(sym->nam);
5736                         free(sym->val);
5737                         TAILQ_REMOVE(&symhead, sym, entry);
5738                         free(sym);
5739                 }
5740         }
5741         if ((sym = calloc(1, sizeof(*sym))) == NULL)
5742                 return (-1);
5743
5744         sym->nam = strdup(nam);
5745         if (sym->nam == NULL) {
5746                 free(sym);
5747                 return (-1);
5748         }
5749         sym->val = strdup(val);
5750         if (sym->val == NULL) {
5751                 free(sym->nam);
5752                 free(sym);
5753                 return (-1);
5754         }
5755         sym->used = 0;
5756         sym->persist = persist;
5757         TAILQ_INSERT_TAIL(&symhead, sym, entry);
5758         return (0);
5759 }
5760
5761 int
5762 pfctl_cmdline_symset(char *s)
5763 {
5764         char    *sym, *val;
5765         int      ret;
5766
5767         if ((val = strrchr(s, '=')) == NULL)
5768                 return (-1);
5769
5770         if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
5771                 err(1, "pfctl_cmdline_symset: malloc");
5772
5773         strlcpy(sym, s, strlen(s) - strlen(val) + 1);
5774
5775         ret = symset(sym, val + 1, 1);
5776         free(sym);
5777
5778         return (ret);
5779 }
5780
5781 char *
5782 symget(const char *nam)
5783 {
5784         struct sym      *sym;
5785
5786         TAILQ_FOREACH(sym, &symhead, entry)
5787                 if (strcmp(nam, sym->nam) == 0) {
5788                         sym->used = 1;
5789                         return (sym->val);
5790                 }
5791         return (NULL);
5792 }
5793
5794 void
5795 mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst)
5796 {
5797         int i;
5798         struct pf_rule *r;
5799
5800         for (i = 0; i < PF_RULESET_MAX; ++i) {
5801                 while ((r = TAILQ_FIRST(src->rules[i].active.ptr))
5802                     != NULL) {
5803                         TAILQ_REMOVE(src->rules[i].active.ptr, r, entries);
5804                         TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries);
5805                         dst->anchor->match++;
5806                 }
5807                 src->anchor->match = 0;
5808                 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr))
5809                     != NULL) {
5810                         TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries);
5811                         TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr,
5812                                 r, entries);
5813                 }
5814         }
5815 }
5816
5817 void
5818 decide_address_family(struct node_host *n, sa_family_t *af)
5819 {
5820         if (*af != 0 || n == NULL)
5821                 return;
5822         *af = n->af;
5823         while ((n = n->next) != NULL) {
5824                 if (n->af != *af) {
5825                         *af = 0;
5826                         return;
5827                 }
5828         }
5829 }
5830
5831 void
5832 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
5833 {
5834         struct node_host        *n = *nh, *prev = NULL;
5835
5836         while (n != NULL) {
5837                 if (*af && n->af && n->af != *af) {
5838                         /* unlink and free n */
5839                         struct node_host *next = n->next;
5840
5841                         /* adjust tail pointer */
5842                         if (n == (*nh)->tail)
5843                                 (*nh)->tail = prev;
5844                         /* adjust previous node's next pointer */
5845                         if (prev == NULL)
5846                                 *nh = next;
5847                         else
5848                                 prev->next = next;
5849                         /* free node */
5850                         if (n->ifname != NULL)
5851                                 free(n->ifname);
5852                         free(n);
5853                         n = next;
5854                 } else {
5855                         if (n->af && !*af)
5856                                 *af = n->af;
5857                         prev = n;
5858                         n = n->next;
5859                 }
5860         }
5861 }
5862
5863 int
5864 invalid_redirect(struct node_host *nh, sa_family_t af)
5865 {
5866         if (!af) {
5867                 struct node_host *n;
5868
5869                 /* tables and dyniftl are ok without an address family */
5870                 for (n = nh; n != NULL; n = n->next) {
5871                         if (n->addr.type != PF_ADDR_TABLE &&
5872                             n->addr.type != PF_ADDR_DYNIFTL) {
5873                                 yyerror("address family not given and "
5874                                     "translation address expands to multiple "
5875                                     "address families");
5876                                 return (1);
5877                         }
5878                 }
5879         }
5880         if (nh == NULL) {
5881                 yyerror("no translation address with matching address family "
5882                     "found.");
5883                 return (1);
5884         }
5885         return (0);
5886 }
5887
5888 int
5889 atoul(char *s, u_long *ulvalp)
5890 {
5891         u_long   ulval;
5892         char    *ep;
5893
5894         errno = 0;
5895         ulval = strtoul(s, &ep, 0);
5896         if (s[0] == '\0' || *ep != '\0')
5897                 return (-1);
5898         if (errno == ERANGE && ulval == ULONG_MAX)
5899                 return (-1);
5900         *ulvalp = ulval;
5901         return (0);
5902 }
5903
5904 int
5905 getservice(char *n)
5906 {
5907         struct servent  *s;
5908         u_long           ulval;
5909
5910         if (atoul(n, &ulval) == 0) {
5911                 if (ulval > 65535) {
5912                         yyerror("illegal port value %lu", ulval);
5913                         return (-1);
5914                 }
5915                 return (htons(ulval));
5916         } else {
5917                 s = getservbyname(n, "tcp");
5918                 if (s == NULL)
5919                         s = getservbyname(n, "udp");
5920                 if (s == NULL) {
5921                         yyerror("unknown port %s", n);
5922                         return (-1);
5923                 }
5924                 return (s->s_port);
5925         }
5926 }
5927
5928 int
5929 rule_label(struct pf_rule *r, char *s)
5930 {
5931         if (s) {
5932                 if (strlcpy(r->label, s, sizeof(r->label)) >=
5933                     sizeof(r->label)) {
5934                         yyerror("rule label too long (max %d chars)",
5935                             sizeof(r->label)-1);
5936                         return (-1);
5937                 }
5938         }
5939         return (0);
5940 }
5941
5942 u_int16_t
5943 parseicmpspec(char *w, sa_family_t af)
5944 {
5945         const struct icmpcodeent        *p;
5946         u_long                           ulval;
5947         u_int8_t                         icmptype;
5948
5949         if (af == AF_INET)
5950                 icmptype = returnicmpdefault >> 8;
5951         else
5952                 icmptype = returnicmp6default >> 8;
5953
5954         if (atoul(w, &ulval) == -1) {
5955                 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
5956                         yyerror("unknown icmp code %s", w);
5957                         return (0);
5958                 }
5959                 ulval = p->code;
5960         }
5961         if (ulval > 255) {
5962                 yyerror("invalid icmp code %lu", ulval);
5963                 return (0);
5964         }
5965         return (icmptype << 8 | ulval);
5966 }
5967
5968 int
5969 parseport(char *port, struct range *r, int extensions)
5970 {
5971         char    *p = strchr(port, ':');
5972
5973         if (p == NULL) {
5974                 if ((r->a = getservice(port)) == -1)
5975                         return (-1);
5976                 r->b = 0;
5977                 r->t = PF_OP_NONE;
5978                 return (0);
5979         }
5980         if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
5981                 *p = 0;
5982                 if ((r->a = getservice(port)) == -1)
5983                         return (-1);
5984                 r->b = 0;
5985                 r->t = PF_OP_IRG;
5986                 return (0);
5987         }
5988         if ((extensions & PPORT_RANGE)) {
5989                 *p++ = 0;
5990                 if ((r->a = getservice(port)) == -1 ||
5991                     (r->b = getservice(p)) == -1)
5992                         return (-1);
5993                 if (r->a == r->b) {
5994                         r->b = 0;
5995                         r->t = PF_OP_NONE;
5996                 } else
5997                         r->t = PF_OP_RRG;
5998                 return (0);
5999         }
6000         return (-1);
6001 }
6002
6003 int
6004 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
6005 {
6006         struct loadanchors      *la;
6007
6008         TAILQ_FOREACH(la, &loadanchorshead, entries) {
6009                 if (pf->opts & PF_OPT_VERBOSE)
6010                         fprintf(stderr, "\nLoading anchor %s from %s\n",
6011                             la->anchorname, la->filename);
6012                 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
6013                     la->anchorname, trans) == -1)
6014                         return (-1);
6015         }
6016
6017         return (0);
6018 }
6019
6020 int
6021 rt_tableid_max(void)
6022 {
6023 #ifdef __FreeBSD__
6024         int fibs;
6025         size_t l = sizeof(fibs);
6026
6027         if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1)
6028                 fibs = 16;      /* XXX RT_MAXFIBS, at least limit it some. */
6029         /*
6030          * As the OpenBSD code only compares > and not >= we need to adjust
6031          * here given we only accept values of 0..n and want to avoid #ifdefs
6032          * in the grammer.
6033          */
6034         return (fibs - 1);
6035 #else
6036         return (RT_TABLEID_MAX);
6037 #endif
6038 }