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 #include <altq/altq_fairq.h>
  52
  53 #include <stdio.h>
  54 #include <unistd.h>
  55 #include <stdlib.h>
  56 #include <netdb.h>
  57 #include <stdarg.h>
  58 #include <errno.h>
  59 #include <string.h>
  60 #include <ctype.h>
  61 #include <math.h>
  62 #include <err.h>
  63 #include <limits.h>
  64 #include <pwd.h>
  65 #include <grp.h>
  66 #include <md5.h>
  67
  68 #include "pfctl_parser.h"
  69 #include "pfctl.h"
  70
  71 static struct pfctl     *pf = NULL;
  72 static int               debug = 0;
  73 static int               rulestate = 0;
  74 static u_int16_t         returnicmpdefault =
  75                             (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
  76 static u_int16_t         returnicmp6default =
  77                             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
  78 static int               blockpolicy = PFRULE_DROP;
  79 static int               require_order = 1;
  80 static int               default_statelock;
  81
  82 TAILQ_HEAD(files, file)          files = TAILQ_HEAD_INITIALIZER(files);
  83 static struct file {
  84         TAILQ_ENTRY(file)        entry;
  85         FILE                    *stream;
  86         char                    *name;
  87         int                      lineno;
  88         int                      errors;
  89 } *file;
  90 struct file     *pushfile(const char *, int);
  91 int              popfile(void);
  92 int              check_file_secrecy(int, const char *);
  93 int              yyparse(void);
  94 int              yylex(void);
  95 int              yyerror(const char *, ...);
  96 int              kw_cmp(const void *, const void *);
  97 int              lookup(char *);
  98 int              lgetc(int);
  99 int              lungetc(int);
 100 int              findeol(void);
 101
 102 TAILQ_HEAD(symhead, sym)         symhead = TAILQ_HEAD_INITIALIZER(symhead);
 103 struct sym {
 104         TAILQ_ENTRY(sym)         entry;
 105         int                      used;
 106         int                      persist;
 107         char                    *nam;
 108         char                    *val;
 109 };
 110 int              symset(const char *, const char *, int);
 111 char            *symget(const char *);
 112
 113 int              atoul(char *, u_long *);
 114
 115 enum {
 116         PFCTL_STATE_NONE,
 117         PFCTL_STATE_OPTION,
 118         PFCTL_STATE_SCRUB,
 119         PFCTL_STATE_QUEUE,
 120         PFCTL_STATE_NAT,
 121         PFCTL_STATE_FILTER
 122 };
 123
 124 struct node_proto {
 125         u_int8_t                 proto;
 126         struct node_proto       *next;
 127         struct node_proto       *tail;
 128 };
 129
 130 struct node_port {
 131         u_int16_t                port[2];
 132         u_int8_t                 op;
 133         struct node_port        *next;
 134         struct node_port        *tail;
 135 };
 136
 137 struct node_uid {
 138         uid_t                    uid[2];
 139         u_int8_t                 op;
 140         struct node_uid         *next;
 141         struct node_uid         *tail;
 142 };
 143
 144 struct node_gid {
 145         gid_t                    gid[2];
 146         u_int8_t                 op;
 147         struct node_gid         *next;
 148         struct node_gid         *tail;
 149 };
 150
 151 struct node_icmp {
 152         u_int8_t                 code;
 153         u_int8_t                 type;
 154         u_int8_t                 proto;
 155         struct node_icmp        *next;
 156         struct node_icmp        *tail;
 157 };
 158
 159 enum    { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
 160             PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
 161             PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
 162             PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
 163             PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, };
 164
 165 enum    { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
 166
 167 struct node_state_opt {
 168         int                      type;
 169         union {
 170                 u_int32_t        max_states;
 171                 u_int32_t        max_src_states;
 172                 u_int32_t        max_src_conn;
 173                 struct {
 174                         u_int32_t       limit;
 175                         u_int32_t       seconds;
 176                 }                max_src_conn_rate;
 177                 struct {
 178                         u_int8_t        flush;
 179                         char            tblname[PF_TABLE_NAME_SIZE];
 180                 }                overload;
 181                 u_int32_t        max_src_nodes;
 182                 u_int8_t         src_track;
 183                 u_int32_t        statelock;
 184                 struct {
 185                         int             number;
 186                         u_int32_t       seconds;
 187                 }                timeout;
 188         }                        data;
 189         struct node_state_opt   *next;
 190         struct node_state_opt   *tail;
 191 };
 192
 193 struct peer {
 194         struct node_host        *host;
 195         struct node_port        *port;
 196 };
 197
 198 struct node_queue {
 199         char                     queue[PF_QNAME_SIZE];
 200         char                     parent[PF_QNAME_SIZE];
 201         char                     ifname[IFNAMSIZ];
 202         int                      scheduler;
 203         struct node_queue       *next;
 204         struct node_queue       *tail;
 205 }       *queues = NULL;
 206
 207 struct node_qassign {
 208         char            *qname;
 209         char            *pqname;
 210 };
 211
 212 struct filter_opts {
 213         int                      marker;
 214 #define FOM_FLAGS       0x01
 215 #define FOM_ICMP        0x02
 216 #define FOM_TOS         0x04
 217 #define FOM_KEEP        0x08
 218 #define FOM_SRCTRACK    0x10
 219         struct node_uid         *uid;
 220         struct node_gid         *gid;
 221         struct {
 222                 u_int8_t         b1;
 223                 u_int8_t         b2;
 224                 u_int16_t        w;
 225                 u_int16_t        w2;
 226         } flags;
 227         struct node_icmp        *icmpspec;
 228         u_int32_t                tos;
 229         u_int32_t                prob;
 230         struct {
 231                 int                      action;
 232                 struct node_state_opt   *options;
 233         } keep;
 234         int                      fragment;
 235         int                      allowopts;
 236         char                    *label;
 237         struct node_qassign      queues;
 238         char                    *tag;
 239         char                    *match_tag;
 240         u_int8_t                 match_tag_not;
 241         u_int                    rtableid;
 242         struct {
 243                 struct node_host        *addr;
 244                 u_int16_t               port;
 245         }                        divert;
 246 } filter_opts;
 247
 248 struct antispoof_opts {
 249         char                    *label;
 250         u_int                    rtableid;
 251 } antispoof_opts;
 252
 253 struct scrub_opts {
 254         int                      marker;
 255 #define SOM_MINTTL      0x01
 256 #define SOM_MAXMSS      0x02
 257 #define SOM_FRAGCACHE   0x04
 258 #define SOM_SETTOS      0x08
 259         int                      nodf;
 260         int                      minttl;
 261         int                      maxmss;
 262         int                      settos;
 263         int                      fragcache;
 264         int                      randomid;
 265         int                      reassemble_tcp;
 266         char                    *match_tag;
 267         u_int8_t                 match_tag_not;
 268         u_int                    rtableid;
 269 } scrub_opts;
 270
 271 struct queue_opts {
 272         int                     marker;
 273 #define QOM_BWSPEC      0x01
 274 #define QOM_SCHEDULER   0x02
 275 #define QOM_PRIORITY    0x04
 276 #define QOM_TBRSIZE     0x08
 277 #define QOM_QLIMIT      0x10
 278         struct node_queue_bw    queue_bwspec;
 279         struct node_queue_opt   scheduler;
 280         int                     priority;
 281         int                     tbrsize;
 282         int                     qlimit;
 283 } queue_opts;
 284
 285 struct table_opts {
 286         int                     flags;
 287         int                     init_addr;
 288         struct node_tinithead   init_nodes;
 289 } table_opts;
 290
 291 struct pool_opts {
 292         int                      marker;
 293 #define POM_TYPE                0x01
 294 #define POM_STICKYADDRESS       0x02
 295         u_int8_t                 opts;
 296         int                      type;
 297         int                      staticport;
 298         struct pf_poolhashkey   *key;
 299
 300 } pool_opts;
 301
 302
 303 struct node_hfsc_opts    hfsc_opts;
 304 struct node_fairq_opts   fairq_opts;
 305 struct node_state_opt   *keep_state_defaults = NULL;
 306
 307 int              disallow_table(struct node_host *, const char *);
 308 int              disallow_urpf_failed(struct node_host *, const char *);
 309 int              disallow_alias(struct node_host *, const char *);
 310 int              rule_consistent(struct pf_rule *, int);
 311 int              filter_consistent(struct pf_rule *, int);
 312 int              nat_consistent(struct pf_rule *);
 313 int              rdr_consistent(struct pf_rule *);
 314 int              process_tabledef(char *, struct table_opts *);
 315 void             expand_label_str(char *, size_t, const char *, const char *);
 316 void             expand_label_if(const char *, char *, size_t, const char *);
 317 void             expand_label_addr(const char *, char *, size_t, u_int8_t,
 318                     struct node_host *);
 319 void             expand_label_port(const char *, char *, size_t,
 320                     struct node_port *);
 321 void             expand_label_proto(const char *, char *, size_t, u_int8_t);
 322 void             expand_label_nr(const char *, char *, size_t);
 323 void             expand_label(char *, size_t, const char *, u_int8_t,
 324                     struct node_host *, struct node_port *, struct node_host *,
 325                     struct node_port *, u_int8_t);
 326 void             expand_rule(struct pf_rule *, struct node_if *,
 327                     struct node_host *, struct node_proto *, struct node_os *,
 328                     struct node_host *, struct node_port *, struct node_host *,
 329                     struct node_port *, struct node_uid *, struct node_gid *,
 330                     struct node_icmp *, const char *);
 331 int              expand_altq(struct pf_altq *, struct node_if *,
 332                     struct node_queue *, struct node_queue_bw bwspec,
 333                     struct node_queue_opt *);
 334 int              expand_queue(struct pf_altq *, struct node_if *,
 335                     struct node_queue *, struct node_queue_bw,
 336                     struct node_queue_opt *);
 337 int              expand_skip_interface(struct node_if *);
 338
 339 int      check_rulestate(int);
 340 int      getservice(char *);
 341 int      rule_label(struct pf_rule *, char *);
 342 int      rt_tableid_max(void);
 343
 344 void     mv_rules(struct pf_ruleset *, struct pf_ruleset *);
 345 void     decide_address_family(struct node_host *, sa_family_t *);
 346 void     remove_invalid_hosts(struct node_host **, sa_family_t *);
 347 int      invalid_redirect(struct node_host *, sa_family_t);
 348 u_int16_t parseicmpspec(char *, sa_family_t);
 349
 350 TAILQ_HEAD(loadanchorshead, loadanchors)
 351     loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
 352
 353 struct loadanchors {
 354         TAILQ_ENTRY(loadanchors)         entries;
 355         char                            *anchorname;
 356         char                            *filename;
 357 };
 358
 359 typedef struct {
 360         union {
 361                 int64_t                  number;
 362                 double                   probability;
 363                 int                      i;
 364                 char                    *string;
 365                 u_int                    rtableid;
 366                 struct {
 367                         u_int8_t         b1;
 368                         u_int8_t         b2;
 369                         u_int16_t        w;
 370                         u_int16_t        w2;
 371                 }                        b;
 372                 struct range {
 373                         int              a;
 374                         int              b;
 375                         int              t;
 376                 }                        range;
 377                 struct node_if          *interface;
 378                 struct node_proto       *proto;
 379                 struct node_icmp        *icmp;
 380                 struct node_host        *host;
 381                 struct node_os          *os;
 382                 struct node_port        *port;
 383                 struct node_uid         *uid;
 384                 struct node_gid         *gid;
 385                 struct node_state_opt   *state_opt;
 386                 struct peer              peer;
 387                 struct {
 388                         struct peer      src, dst;
 389                         struct node_os  *src_os;
 390                 }                        fromto;
 391                 struct {
 392                         struct node_host        *host;
 393                         u_int8_t                 rt;
 394                         u_int8_t                 pool_opts;
 395                         sa_family_t              af;
 396                         struct pf_poolhashkey   *key;
 397                 }                        route;
 398                 struct redirection {
 399                         struct node_host        *host;
 400                         struct range             rport;
 401                 }                       *redirection;
 402                 struct {
 403                         int                      action;
 404                         struct node_state_opt   *options;
 405                 }                        keep_state;
 406                 struct {
 407                         u_int8_t         log;
 408                         u_int8_t         logif;
 409                         u_int8_t         quick;
 410                 }                        logquick;
 411                 struct {
 412                         int              neg;
 413                         char            *name;
 414                 }                        tagged;
 415                 struct pf_poolhashkey   *hashkey;
 416                 struct node_queue       *queue;
 417                 struct node_queue_opt    queue_options;
 418                 struct node_queue_bw     queue_bwspec;
 419                 struct node_qassign      qassign;
 420                 struct filter_opts       filter_opts;
 421                 struct antispoof_opts    antispoof_opts;
 422                 struct queue_opts        queue_opts;
 423                 struct scrub_opts        scrub_opts;
 424                 struct table_opts        table_opts;
 425                 struct pool_opts         pool_opts;
 426                 struct node_hfsc_opts    hfsc_opts;
 427                 struct node_fairq_opts   fairq_opts;
 428         } v;
 429         int lineno;
 430 } YYSTYPE;
 431
 432 #define PPORT_RANGE     1
 433 #define PPORT_STAR      2
 434 int     parseport(char *, struct range *r, int);
 435
 436 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
 437         (!((addr).iflags & PFI_AFLAG_NOALIAS) ||                 \
 438         !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
 439
 440 %}
 441
 442 %token  PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
 443 %token  RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
 444 %token  ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
 445 %token  MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
 446 %token  NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
 447 %token  REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
 448 %token  SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID
 449 %token  REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
 450 %token  ANTISPOOF FOR INCLUDE
 451 %token  BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY
 452 %token  ALTQ CBQ PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT
 453 %token  QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE
 454 %token  LOAD RULESET_OPTIMIZATION
 455 %token  STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
 456 %token  MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY
 457 %token  TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
 458 %token  DIVERTTO DIVERTREPLY
 459 %token  <v.string>              STRING
 460 %token  <v.number>              NUMBER
 461 %token  <v.i>                   PORTBINARY
 462 %type   <v.interface>           interface if_list if_item_not if_item
 463 %type   <v.number>              number icmptype icmp6type uid gid
 464 %type   <v.number>              tos not yesno
 465 %type   <v.probability>         probability
 466 %type   <v.i>                   no dir af fragcache optimizer
 467 %type   <v.i>                   sourcetrack flush unaryop statelock
 468 %type   <v.b>                   action nataction natpasslog scrubaction
 469 %type   <v.b>                   flags flag blockspec
 470 %type   <v.range>               portplain portstar portrange
 471 %type   <v.hashkey>             hashkey
 472 %type   <v.proto>               proto proto_list proto_item
 473 %type   <v.number>              protoval
 474 %type   <v.icmp>                icmpspec
 475 %type   <v.icmp>                icmp_list icmp_item
 476 %type   <v.icmp>                icmp6_list icmp6_item
 477 %type   <v.number>              reticmpspec reticmp6spec
 478 %type   <v.fromto>              fromto
 479 %type   <v.peer>                ipportspec from to
 480 %type   <v.host>                ipspec toipspec xhost host dynaddr host_list
 481 %type   <v.host>                redir_host_list redirspec
 482 %type   <v.host>                route_host route_host_list routespec
 483 %type   <v.os>                  os xos os_list
 484 %type   <v.port>                portspec port_list port_item
 485 %type   <v.uid>                 uids uid_list uid_item
 486 %type   <v.gid>                 gids gid_list gid_item
 487 %type   <v.route>               route
 488 %type   <v.redirection>         redirection redirpool
 489 %type   <v.string>              label stringall tag anchorname
 490 %type   <v.string>              string varstring numberstring
 491 %type   <v.keep_state>          keep
 492 %type   <v.state_opt>           state_opt_spec state_opt_list state_opt_item
 493 %type   <v.logquick>            logquick quick log logopts logopt
 494 %type   <v.interface>           antispoof_ifspc antispoof_iflst antispoof_if
 495 %type   <v.qassign>             qname
 496 %type   <v.queue>               qassign qassign_list qassign_item
 497 %type   <v.queue_options>       scheduler
 498 %type   <v.number>              cbqflags_list cbqflags_item
 499 %type   <v.number>              priqflags_list priqflags_item
 500 %type   <v.hfsc_opts>           hfscopts_list hfscopts_item hfsc_opts
 501 %type   <v.fairq_opts>          fairqopts_list fairqopts_item fairq_opts
 502 %type   <v.queue_bwspec>        bandwidth
 503 %type   <v.filter_opts>         filter_opts filter_opt filter_opts_l
 504 %type   <v.antispoof_opts>      antispoof_opts antispoof_opt antispoof_opts_l
 505 %type   <v.queue_opts>          queue_opts queue_opt queue_opts_l
 506 %type   <v.scrub_opts>          scrub_opts scrub_opt scrub_opts_l
 507 %type   <v.table_opts>          table_opts table_opt table_opts_l
 508 %type   <v.pool_opts>           pool_opts pool_opt pool_opts_l
 509 %type   <v.tagged>              tagged
 510 %type   <v.rtableid>            rtable
 511 %%
 512
 513 ruleset         : /* empty */
 514                 | ruleset include '\n'
 515                 | ruleset '\n'
 516                 | ruleset option '\n'
 517                 | ruleset scrubrule '\n'
 518                 | ruleset natrule '\n'
 519                 | ruleset binatrule '\n'
 520                 | ruleset pfrule '\n'
 521                 | ruleset anchorrule '\n'
 522                 | ruleset loadrule '\n'
 523                 | ruleset altqif '\n'
 524                 | ruleset queuespec '\n'
 525                 | ruleset varset '\n'
 526                 | ruleset antispoof '\n'
 527                 | ruleset tabledef '\n'
 528                 | '{' fakeanchor '}' '\n';
 529                 | ruleset error '\n'            { file->errors++; }
 530                 ;
 531
 532 include         : INCLUDE STRING                {
 533                         struct file     *nfile;
 534
 535                         if ((nfile = pushfile($2, 0)) == NULL) {
 536                                 yyerror("failed to include file %s", $2);
 537                                 free($2);
 538                                 YYERROR;
 539                         }
 540                         free($2);
 541
 542                         file = nfile;
 543                         lungetc('\n');
 544                 }
 545                 ;
 546
 547 /*
 548  * apply to previouslys specified rule: must be careful to note
 549  * what that is: pf or nat or binat or rdr
 550  */
 551 fakeanchor      : fakeanchor '\n'
 552                 | fakeanchor anchorrule '\n'
 553                 | fakeanchor binatrule '\n'
 554                 | fakeanchor natrule '\n'
 555                 | fakeanchor pfrule '\n'
 556                 | fakeanchor error '\n'
 557                 ;
 558
 559 optimizer       : string        {
 560                         if (!strcmp($1, "none"))
 561                                 $$ = 0;
 562                         else if (!strcmp($1, "basic"))
 563                                 $$ = PF_OPTIMIZE_BASIC;
 564                         else if (!strcmp($1, "profile"))
 565                                 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
 566                         else {
 567                                 yyerror("unknown ruleset-optimization %s", $1);
 568                                 YYERROR;
 569                         }
 570                 }
 571                 ;
 572
 573 option          : SET OPTIMIZATION STRING               {
 574                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 575                                 free($3);
 576                                 YYERROR;
 577                         }
 578                         if (pfctl_set_optimization(pf, $3) != 0) {
 579                                 yyerror("unknown optimization %s", $3);
 580                                 free($3);
 581                                 YYERROR;
 582                         }
 583                         free($3);
 584                 }
 585                 | SET RULESET_OPTIMIZATION optimizer {
 586                         if (!(pf->opts & PF_OPT_OPTIMIZE)) {
 587                                 pf->opts |= PF_OPT_OPTIMIZE;
 588                                 pf->optimize = $3;
 589                         }
 590                 }
 591                 | SET TIMEOUT timeout_spec
 592                 | SET TIMEOUT '{' optnl timeout_list '}'
 593                 | SET LIMIT limit_spec
 594                 | SET LIMIT '{' optnl limit_list '}'
 595                 | SET LOGINTERFACE stringall            {
 596                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 597                                 free($3);
 598                                 YYERROR;
 599                         }
 600                         if (pfctl_set_logif(pf, $3) != 0) {
 601                                 yyerror("error setting loginterface %s", $3);
 602                                 free($3);
 603                                 YYERROR;
 604                         }
 605                         free($3);
 606                 }
 607                 | SET HOSTID number {
 608                         if ($3 == 0 || $3 > UINT_MAX) {
 609                                 yyerror("hostid must be non-zero");
 610                                 YYERROR;
 611                         }
 612                         if (pfctl_set_hostid(pf, $3) != 0) {
 613                                 yyerror("error setting hostid %08x", $3);
 614                                 YYERROR;
 615                         }
 616                 }
 617                 | SET BLOCKPOLICY DROP  {
 618                         if (pf->opts & PF_OPT_VERBOSE)
 619                                 printf("set block-policy drop\n");
 620                         if (check_rulestate(PFCTL_STATE_OPTION))
 621                                 YYERROR;
 622                         blockpolicy = PFRULE_DROP;
 623                 }
 624                 | SET BLOCKPOLICY RETURN {
 625                         if (pf->opts & PF_OPT_VERBOSE)
 626                                 printf("set block-policy return\n");
 627                         if (check_rulestate(PFCTL_STATE_OPTION))
 628                                 YYERROR;
 629                         blockpolicy = PFRULE_RETURN;
 630                 }
 631                 | SET REQUIREORDER yesno {
 632                         if (pf->opts & PF_OPT_VERBOSE)
 633                                 printf("set require-order %s\n",
 634                                     $3 == 1 ? "yes" : "no");
 635                         require_order = $3;
 636                 }
 637                 | SET FINGERPRINTS STRING {
 638                         if (pf->opts & PF_OPT_VERBOSE)
 639                                 printf("set fingerprints \"%s\"\n", $3);
 640                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 641                                 free($3);
 642                                 YYERROR;
 643                         }
 644                         if (!pf->anchor->name[0]) {
 645                                 if (pfctl_file_fingerprints(pf->dev,
 646                                     pf->opts, $3)) {
 647                                         yyerror("error loading "
 648                                             "fingerprints %s", $3);
 649                                         free($3);
 650                                         YYERROR;
 651                                 }
 652                         }
 653                         free($3);
 654                 }
 655                 | SET STATEPOLICY statelock {
 656                         if (pf->opts & PF_OPT_VERBOSE)
 657                                 switch ($3) {
 658                                 case 0:
 659                                         printf("set state-policy floating\n");
 660                                         break;
 661                                 case PFRULE_IFBOUND:
 662                                         printf("set state-policy if-bound\n");
 663                                         break;
 664                                 }
 665                         default_statelock = $3;
 666                 }
 667                 | SET DEBUG STRING {
 668                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 669                                 free($3);
 670                                 YYERROR;
 671                         }
 672                         if (pfctl_set_debug(pf, $3) != 0) {
 673                                 yyerror("error setting debuglevel %s", $3);
 674                                 free($3);
 675                                 YYERROR;
 676                         }
 677                         free($3);
 678                 }
 679                 | SET SKIP interface {
 680                         if (expand_skip_interface($3) != 0) {
 681                                 yyerror("error setting skip interface(s)");
 682                                 YYERROR;
 683                         }
 684                 }
 685                 | SET STATEDEFAULTS state_opt_list {
 686                         if (keep_state_defaults != NULL) {
 687                                 yyerror("cannot redefine state-defaults");
 688                                 YYERROR;
 689                         }
 690                         keep_state_defaults = $3;
 691                 }
 692                 ;
 693
 694 stringall       : STRING        { $$ = $1; }
 695                 | ALL           {
 696                         if (($$ = strdup("all")) == NULL) {
 697                                 err(1, "stringall: strdup");
 698                         }
 699                 }
 700                 ;
 701
 702 string          : STRING string                         {
 703                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 704                                 err(1, "string: asprintf");
 705                         free($1);
 706                         free($2);
 707                 }
 708                 | STRING
 709                 ;
 710
 711 varstring       : numberstring varstring                {
 712                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 713                                 err(1, "string: asprintf");
 714                         free($1);
 715                         free($2);
 716                 }
 717                 | numberstring
 718                 ;
 719
 720 numberstring    : NUMBER                                {
 721                         char    *s;
 722                         if (asprintf(&s, "%lld", (long long)$1) == -1) {
 723                                 yyerror("string: asprintf");
 724                                 YYERROR;
 725                         }
 726                         $$ = s;
 727                 }
 728                 | STRING
 729                 ;
 730
 731 varset          : STRING '=' varstring  {
 732                         if (pf->opts & PF_OPT_VERBOSE)
 733                                 printf("%s = \"%s\"\n", $1, $3);
 734                         if (symset($1, $3, 0) == -1)
 735                                 err(1, "cannot store variable %s", $1);
 736                         free($1);
 737                         free($3);
 738                 }
 739                 ;
 740
 741 anchorname      : STRING                        { $$ = $1; }
 742                 | /* empty */                   { $$ = NULL; }
 743                 ;
 744
 745 pfa_anchorlist  : /* empty */
 746                 | pfa_anchorlist '\n'
 747                 | pfa_anchorlist pfrule '\n'
 748                 | pfa_anchorlist anchorrule '\n'
 749                 ;
 750
 751 pfa_anchor      : '{'
 752                 {
 753                         char ta[PF_ANCHOR_NAME_SIZE];
 754                         struct pf_ruleset *rs;
 755
 756                         /* steping into a brace anchor */
 757                         pf->asd++;
 758                         pf->bn++;
 759                         pf->brace = 1;
 760
 761                         /* create a holding ruleset in the root */
 762                         snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
 763                         rs = pf_find_or_create_ruleset(ta);
 764                         if (rs == NULL)
 765                                 err(1, "pfa_anchor: pf_find_or_create_ruleset");
 766                         pf->astack[pf->asd] = rs->anchor;
 767                         pf->anchor = rs->anchor;
 768                 } '\n' pfa_anchorlist '}'
 769                 {
 770                         pf->alast = pf->anchor;
 771                         pf->asd--;
 772                         pf->anchor = pf->astack[pf->asd];
 773                 }
 774                 | /* empty */
 775                 ;
 776
 777 anchorrule      : ANCHOR anchorname dir quick interface af proto fromto
 778                     filter_opts pfa_anchor
 779                 {
 780                         struct pf_rule  r;
 781                         struct node_proto       *proto;
 782
 783                         if (check_rulestate(PFCTL_STATE_FILTER)) {
 784                                 if ($2)
 785                                         free($2);
 786                                 YYERROR;
 787                         }
 788
 789                         if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
 790                                 free($2);
 791                                 yyerror("anchor names beginning with '_' "
 792                                     "are reserved for internal use");
 793                                 YYERROR;
 794                         }
 795
 796                         memset(&r, 0, sizeof(r));
 797                         if (pf->astack[pf->asd + 1]) {
 798                                 /* move inline rules into relative location */
 799                                 pf_anchor_setup(&r,
 800                                     &pf->astack[pf->asd]->ruleset,
 801                                     $2 ? $2 : pf->alast->name);
 802
 803                                 if (r.anchor == NULL)
 804                                         err(1, "anchorrule: unable to "
 805                                             "create ruleset");
 806
 807                                 if (pf->alast != r.anchor) {
 808                                         if (r.anchor->match) {
 809                                                 yyerror("inline anchor '%s' "
 810                                                     "already exists",
 811                                                     r.anchor->name);
 812                                                 YYERROR;
 813                                         }
 814                                         mv_rules(&pf->alast->ruleset,
 815                                             &r.anchor->ruleset);
 816                                 }
 817                                 pf_remove_if_empty_ruleset(&pf->alast->ruleset);
 818                                 pf->alast = r.anchor;
 819                         } else {
 820                                 if (!$2) {
 821                                         yyerror("anchors without explicit "
 822                                             "rules must specify a name");
 823                                         YYERROR;
 824                                 }
 825                         }
 826                         r.direction = $3;
 827                         r.quick = $4.quick;
 828                         r.af = $6;
 829                         r.prob = $9.prob;
 830                         r.rtableid = $9.rtableid;
 831
 832                         if ($9.tag)
 833                                 if (strlcpy(r.tagname, $9.tag,
 834                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 835                                         yyerror("tag too long, max %u chars",
 836                                             PF_TAG_NAME_SIZE - 1);
 837                                         YYERROR;
 838                                 }
 839                         if ($9.match_tag)
 840                                 if (strlcpy(r.match_tagname, $9.match_tag,
 841                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 842                                         yyerror("tag too long, max %u chars",
 843                                             PF_TAG_NAME_SIZE - 1);
 844                                         YYERROR;
 845                                 }
 846                         r.match_tag_not = $9.match_tag_not;
 847                         if (rule_label(&r, $9.label))
 848                                 YYERROR;
 849                         free($9.label);
 850                         r.flags = $9.flags.b1;
 851                         r.flagset = $9.flags.b2;
 852                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
 853                                 yyerror("flags always false");
 854                                 YYERROR;
 855                         }
 856                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
 857                                 for (proto = $7; proto != NULL &&
 858                                     proto->proto != IPPROTO_TCP;
 859                                     proto = proto->next)
 860                                         ;       /* nothing */
 861                                 if (proto == NULL && $7 != NULL) {
 862                                         if ($9.flags.b1 || $9.flags.b2)
 863                                                 yyerror(
 864                                                     "flags only apply to tcp");
 865                                         if ($8.src_os)
 866                                                 yyerror(
 867                                                     "OS fingerprinting only "
 868                                                     "applies to tcp");
 869                                         YYERROR;
 870                                 }
 871                         }
 872
 873                         r.tos = $9.tos;
 874
 875                         if ($9.keep.action) {
 876                                 yyerror("cannot specify state handling "
 877                                     "on anchors");
 878                                 YYERROR;
 879                         }
 880
 881                         if ($9.match_tag)
 882                                 if (strlcpy(r.match_tagname, $9.match_tag,
 883                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 884                                         yyerror("tag too long, max %u chars",
 885                                             PF_TAG_NAME_SIZE - 1);
 886                                         YYERROR;
 887                                 }
 888                         r.match_tag_not = $9.match_tag_not;
 889
 890                         decide_address_family($8.src.host, &r.af);
 891                         decide_address_family($8.dst.host, &r.af);
 892
 893                         expand_rule(&r, $5, NULL, $7, $8.src_os,
 894                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
 895                             $9.uid, $9.gid, $9.icmpspec,
 896                             pf->astack[pf->asd + 1] ? pf->alast->name : $2);
 897                         free($2);
 898                         pf->astack[pf->asd + 1] = NULL;
 899                 }
 900                 | NATANCHOR string interface af proto fromto rtable {
 901                         struct pf_rule  r;
 902
 903                         if (check_rulestate(PFCTL_STATE_NAT)) {
 904                                 free($2);
 905                                 YYERROR;
 906                         }
 907
 908                         memset(&r, 0, sizeof(r));
 909                         r.action = PF_NAT;
 910                         r.af = $4;
 911                         r.rtableid = $7;
 912
 913                         decide_address_family($6.src.host, &r.af);
 914                         decide_address_family($6.dst.host, &r.af);
 915
 916                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 917                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 918                             0, 0, 0, $2);
 919                         free($2);
 920                 }
 921                 | RDRANCHOR string interface af proto fromto rtable {
 922                         struct pf_rule  r;
 923
 924                         if (check_rulestate(PFCTL_STATE_NAT)) {
 925                                 free($2);
 926                                 YYERROR;
 927                         }
 928
 929                         memset(&r, 0, sizeof(r));
 930                         r.action = PF_RDR;
 931                         r.af = $4;
 932                         r.rtableid = $7;
 933
 934                         decide_address_family($6.src.host, &r.af);
 935                         decide_address_family($6.dst.host, &r.af);
 936
 937                         if ($6.src.port != NULL) {
 938                                 yyerror("source port parameter not supported"
 939                                     " in rdr-anchor");
 940                                 YYERROR;
 941                         }
 942                         if ($6.dst.port != NULL) {
 943                                 if ($6.dst.port->next != NULL) {
 944                                         yyerror("destination port list "
 945                                             "expansion not supported in "
 946                                             "rdr-anchor");
 947                                         YYERROR;
 948                                 } else if ($6.dst.port->op != PF_OP_EQ) {
 949                                         yyerror("destination port operators"
 950                                             " not supported in rdr-anchor");
 951                                         YYERROR;
 952                                 }
 953                                 r.dst.port[0] = $6.dst.port->port[0];
 954                                 r.dst.port[1] = $6.dst.port->port[1];
 955                                 r.dst.port_op = $6.dst.port->op;
 956                         }
 957
 958                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 959                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 960                             0, 0, 0, $2);
 961                         free($2);
 962                 }
 963                 | BINATANCHOR string interface af proto fromto rtable {
 964                         struct pf_rule  r;
 965
 966                         if (check_rulestate(PFCTL_STATE_NAT)) {
 967                                 free($2);
 968                                 YYERROR;
 969                         }
 970
 971                         memset(&r, 0, sizeof(r));
 972                         r.action = PF_BINAT;
 973                         r.af = $4;
 974                         r.rtableid = $7;
 975                         if ($5 != NULL) {
 976                                 if ($5->next != NULL) {
 977                                         yyerror("proto list expansion"
 978                                             " not supported in binat-anchor");
 979                                         YYERROR;
 980                                 }
 981                                 r.proto = $5->proto;
 982                                 free($5);
 983                         }
 984
 985                         if ($6.src.host != NULL || $6.src.port != NULL ||
 986                             $6.dst.host != NULL || $6.dst.port != NULL) {
 987                                 yyerror("fromto parameter not supported"
 988                                     " in binat-anchor");
 989                                 YYERROR;
 990                         }
 991
 992                         decide_address_family($6.src.host, &r.af);
 993                         decide_address_family($6.dst.host, &r.af);
 994
 995                         pfctl_add_rule(pf, &r, $2);
 996                         free($2);
 997                 }
 998                 ;
 999
1000 loadrule        : LOAD ANCHOR string FROM string        {
1001                         struct loadanchors      *loadanchor;
1002
1003                         if (strlen(pf->anchor->name) + 1 +
1004                             strlen($3) >= MAXPATHLEN) {
1005                                 yyerror("anchorname %s too long, max %u\n",
1006                                     $3, MAXPATHLEN - 1);
1007                                 free($3);
1008                                 YYERROR;
1009                         }
1010                         loadanchor = calloc(1, sizeof(struct loadanchors));
1011                         if (loadanchor == NULL)
1012                                 err(1, "loadrule: calloc");
1013                         if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1014                             NULL)
1015                                 err(1, "loadrule: malloc");
1016                         if (pf->anchor->name[0])
1017                                 snprintf(loadanchor->anchorname, MAXPATHLEN,
1018                                     "%s/%s", pf->anchor->name, $3);
1019                         else
1020                                 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1021                         if ((loadanchor->filename = strdup($5)) == NULL)
1022                                 err(1, "loadrule: strdup");
1023
1024                         TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1025                             entries);
1026
1027                         free($3);
1028                         free($5);
1029                 };
1030
1031 scrubaction     : no SCRUB {
1032                         $$.b2 = $$.w = 0;
1033                         if ($1)
1034                                 $$.b1 = PF_NOSCRUB;
1035                         else
1036                                 $$.b1 = PF_SCRUB;
1037                 }
1038                 ;
1039
1040 scrubrule       : scrubaction dir logquick interface af proto fromto scrub_opts
1041                 {
1042                         struct pf_rule  r;
1043
1044                         if (check_rulestate(PFCTL_STATE_SCRUB))
1045                                 YYERROR;
1046
1047                         memset(&r, 0, sizeof(r));
1048
1049                         r.action = $1.b1;
1050                         r.direction = $2;
1051
1052                         r.log = $3.log;
1053                         r.logif = $3.logif;
1054                         if ($3.quick) {
1055                                 yyerror("scrub rules do not support 'quick'");
1056                                 YYERROR;
1057                         }
1058
1059                         r.af = $5;
1060                         if ($8.nodf)
1061                                 r.rule_flag |= PFRULE_NODF;
1062                         if ($8.randomid)
1063                                 r.rule_flag |= PFRULE_RANDOMID;
1064                         if ($8.reassemble_tcp) {
1065                                 if (r.direction != PF_INOUT) {
1066                                         yyerror("reassemble tcp rules can not "
1067                                             "specify direction");
1068                                         YYERROR;
1069                                 }
1070                                 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1071                         }
1072                         if ($8.minttl)
1073                                 r.min_ttl = $8.minttl;
1074                         if ($8.maxmss)
1075                                 r.max_mss = $8.maxmss;
1076                         if ($8.marker & SOM_SETTOS) {
1077                                 r.rule_flag |= PFRULE_SET_TOS;
1078                                 r.set_tos = $8.settos;
1079                         }
1080                         if ($8.fragcache)
1081                                 r.rule_flag |= $8.fragcache;
1082                         if ($8.match_tag)
1083                                 if (strlcpy(r.match_tagname, $8.match_tag,
1084                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1085                                         yyerror("tag too long, max %u chars",
1086                                             PF_TAG_NAME_SIZE - 1);
1087                                         YYERROR;
1088                                 }
1089                         r.match_tag_not = $8.match_tag_not;
1090                         r.rtableid = $8.rtableid;
1091
1092                         expand_rule(&r, $4, NULL, $6, $7.src_os,
1093                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
1094                             NULL, NULL, NULL, "");
1095                 }
1096                 ;
1097
1098 scrub_opts      :       {
1099                                 bzero(&scrub_opts, sizeof scrub_opts);
1100                                 scrub_opts.rtableid = -1;
1101                         }
1102                     scrub_opts_l
1103                         { $$ = scrub_opts; }
1104                 | /* empty */ {
1105                         bzero(&scrub_opts, sizeof scrub_opts);
1106                         scrub_opts.rtableid = -1;
1107                         $$ = scrub_opts;
1108                 }
1109                 ;
1110
1111 scrub_opts_l    : scrub_opts_l scrub_opt
1112                 | scrub_opt
1113                 ;
1114
1115 scrub_opt       : NODF  {
1116                         if (scrub_opts.nodf) {
1117                                 yyerror("no-df cannot be respecified");
1118                                 YYERROR;
1119                         }
1120                         scrub_opts.nodf = 1;
1121                 }
1122                 | MINTTL NUMBER {
1123                         if (scrub_opts.marker & SOM_MINTTL) {
1124                                 yyerror("min-ttl cannot be respecified");
1125                                 YYERROR;
1126                         }
1127                         if ($2 < 0 || $2 > 255) {
1128                                 yyerror("illegal min-ttl value %d", $2);
1129                                 YYERROR;
1130                         }
1131                         scrub_opts.marker |= SOM_MINTTL;
1132                         scrub_opts.minttl = $2;
1133                 }
1134                 | MAXMSS NUMBER {
1135                         if (scrub_opts.marker & SOM_MAXMSS) {
1136                                 yyerror("max-mss cannot be respecified");
1137                                 YYERROR;
1138                         }
1139                         if ($2 < 0 || $2 > 65535) {
1140                                 yyerror("illegal max-mss value %d", $2);
1141                                 YYERROR;
1142                         }
1143                         scrub_opts.marker |= SOM_MAXMSS;
1144                         scrub_opts.maxmss = $2;
1145                 }
1146                 | SETTOS tos {
1147                         if (scrub_opts.marker & SOM_SETTOS) {
1148                                 yyerror("set-tos cannot be respecified");
1149                                 YYERROR;
1150                         }
1151                         scrub_opts.marker |= SOM_SETTOS;
1152                         scrub_opts.settos = $2;
1153                 }
1154                 | fragcache {
1155                         if (scrub_opts.marker & SOM_FRAGCACHE) {
1156                                 yyerror("fragcache cannot be respecified");
1157                                 YYERROR;
1158                         }
1159                         scrub_opts.marker |= SOM_FRAGCACHE;
1160                         scrub_opts.fragcache = $1;
1161                 }
1162                 | REASSEMBLE STRING {
1163                         if (strcasecmp($2, "tcp") != 0) {
1164                                 yyerror("scrub reassemble supports only tcp, "
1165                                     "not '%s'", $2);
1166                                 free($2);
1167                                 YYERROR;
1168                         }
1169                         free($2);
1170                         if (scrub_opts.reassemble_tcp) {
1171                                 yyerror("reassemble tcp cannot be respecified");
1172                                 YYERROR;
1173                         }
1174                         scrub_opts.reassemble_tcp = 1;
1175                 }
1176                 | RANDOMID {
1177                         if (scrub_opts.randomid) {
1178                                 yyerror("random-id cannot be respecified");
1179                                 YYERROR;
1180                         }
1181                         scrub_opts.randomid = 1;
1182                 }
1183                 | RTABLE NUMBER                         {
1184                         if ($2 < 0 || $2 > rt_tableid_max()) {
1185                                 yyerror("invalid rtable id");
1186                                 YYERROR;
1187                         }
1188                         scrub_opts.rtableid = $2;
1189                 }
1190                 | not TAGGED string                     {
1191                         scrub_opts.match_tag = $3;
1192                         scrub_opts.match_tag_not = $1;
1193                 }
1194                 ;
1195
1196 fragcache       : FRAGMENT REASSEMBLE   { $$ = 0; /* default */ }
1197                 | FRAGMENT FRAGCROP     { $$ = PFRULE_FRAGCROP; }
1198                 | FRAGMENT FRAGDROP     { $$ = PFRULE_FRAGDROP; }
1199                 ;
1200
1201 antispoof       : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1202                         struct pf_rule           r;
1203                         struct node_host        *h = NULL, *hh;
1204                         struct node_if          *i, *j;
1205
1206                         if (check_rulestate(PFCTL_STATE_FILTER))
1207                                 YYERROR;
1208
1209                         for (i = $3; i; i = i->next) {
1210                                 bzero(&r, sizeof(r));
1211
1212                                 r.action = PF_DROP;
1213                                 r.direction = PF_IN;
1214                                 r.log = $2.log;
1215                                 r.logif = $2.logif;
1216                                 r.quick = $2.quick;
1217                                 r.af = $4;
1218                                 if (rule_label(&r, $5.label))
1219                                         YYERROR;
1220                                 r.rtableid = $5.rtableid;
1221                                 j = calloc(1, sizeof(struct node_if));
1222                                 if (j == NULL)
1223                                         err(1, "antispoof: calloc");
1224                                 if (strlcpy(j->ifname, i->ifname,
1225                                     sizeof(j->ifname)) >= sizeof(j->ifname)) {
1226                                         free(j);
1227                                         yyerror("interface name too long");
1228                                         YYERROR;
1229                                 }
1230                                 j->not = 1;
1231                                 if (i->dynamic) {
1232                                         h = calloc(1, sizeof(*h));
1233                                         if (h == NULL)
1234                                                 err(1, "address: calloc");
1235                                         h->addr.type = PF_ADDR_DYNIFTL;
1236                                         set_ipmask(h, 128);
1237                                         if (strlcpy(h->addr.v.ifname, i->ifname,
1238                                             sizeof(h->addr.v.ifname)) >=
1239                                             sizeof(h->addr.v.ifname)) {
1240                                                 free(h);
1241                                                 yyerror(
1242                                                     "interface name too long");
1243                                                 YYERROR;
1244                                         }
1245                                         hh = malloc(sizeof(*hh));
1246                                         if (hh == NULL)
1247                                                  err(1, "address: malloc");
1248                                         bcopy(h, hh, sizeof(*hh));
1249                                         h->addr.iflags = PFI_AFLAG_NETWORK;
1250                                 } else {
1251                                         h = ifa_lookup(j->ifname,
1252                                             PFI_AFLAG_NETWORK);
1253                                         hh = NULL;
1254                                 }
1255
1256                                 if (h != NULL)
1257                                         expand_rule(&r, j, NULL, NULL, NULL, h,
1258                                             NULL, NULL, NULL, NULL, NULL,
1259                                             NULL, "");
1260
1261                                 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1262                                         bzero(&r, sizeof(r));
1263
1264                                         r.action = PF_DROP;
1265                                         r.direction = PF_IN;
1266                                         r.log = $2.log;
1267                                         r.logif = $2.logif;
1268                                         r.quick = $2.quick;
1269                                         r.af = $4;
1270                                         if (rule_label(&r, $5.label))
1271                                                 YYERROR;
1272                                         r.rtableid = $5.rtableid;
1273                                         if (hh != NULL)
1274                                                 h = hh;
1275                                         else
1276                                                 h = ifa_lookup(i->ifname, 0);
1277                                         if (h != NULL)
1278                                                 expand_rule(&r, NULL, NULL,
1279                                                     NULL, NULL, h, NULL, NULL,
1280                                                     NULL, NULL, NULL, NULL, "");
1281                                 } else
1282                                         free(hh);
1283                         }
1284                         free($5.label);
1285                 }
1286                 ;
1287
1288 antispoof_ifspc : FOR antispoof_if                      { $$ = $2; }
1289                 | FOR '{' optnl antispoof_iflst '}'     { $$ = $4; }
1290                 ;
1291
1292 antispoof_iflst : antispoof_if optnl                    { $$ = $1; }
1293                 | antispoof_iflst comma antispoof_if optnl {
1294                         $1->tail->next = $3;
1295                         $1->tail = $3;
1296                         $$ = $1;
1297                 }
1298                 ;
1299
1300 antispoof_if    : if_item                               { $$ = $1; }
1301                 | '(' if_item ')'                       {
1302                         $2->dynamic = 1;
1303                         $$ = $2;
1304                 }
1305                 ;
1306
1307 antispoof_opts  :       {
1308                                 bzero(&antispoof_opts, sizeof antispoof_opts);
1309                                 antispoof_opts.rtableid = -1;
1310                         }
1311                     antispoof_opts_l
1312                         { $$ = antispoof_opts; }
1313                 | /* empty */   {
1314                         bzero(&antispoof_opts, sizeof antispoof_opts);
1315                         antispoof_opts.rtableid = -1;
1316                         $$ = antispoof_opts;
1317                 }
1318                 ;
1319
1320 antispoof_opts_l        : antispoof_opts_l antispoof_opt
1321                         | antispoof_opt
1322                         ;
1323
1324 antispoof_opt   : label {
1325                         if (antispoof_opts.label) {
1326                                 yyerror("label cannot be redefined");
1327                                 YYERROR;
1328                         }
1329                         antispoof_opts.label = $1;
1330                 }
1331                 | RTABLE NUMBER                         {
1332                         if ($2 < 0 || $2 > rt_tableid_max()) {
1333                                 yyerror("invalid rtable id");
1334                                 YYERROR;
1335                         }
1336                         antispoof_opts.rtableid = $2;
1337                 }
1338                 ;
1339
1340 not             : '!'           { $$ = 1; }
1341                 | /* empty */   { $$ = 0; }
1342                 ;
1343
1344 tabledef        : TABLE '<' STRING '>' table_opts {
1345                         struct node_host         *h, *nh;
1346                         struct node_tinit        *ti, *nti;
1347
1348                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1349                                 yyerror("table name too long, max %d chars",
1350                                     PF_TABLE_NAME_SIZE - 1);
1351                                 free($3);
1352                                 YYERROR;
1353                         }
1354                         if (pf->loadopt & PFCTL_FLAG_TABLE)
1355                                 if (process_tabledef($3, &$5)) {
1356                                         free($3);
1357                                         YYERROR;
1358                                 }
1359                         free($3);
1360                         for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1361                             ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1362                                 if (ti->file)
1363                                         free(ti->file);
1364                                 for (h = ti->host; h != NULL; h = nh) {
1365                                         nh = h->next;
1366                                         free(h);
1367                                 }
1368                                 nti = SIMPLEQ_NEXT(ti, entries);
1369                                 free(ti);
1370                         }
1371                 }
1372                 ;
1373
1374 table_opts      :       {
1375                         bzero(&table_opts, sizeof table_opts);
1376                         SIMPLEQ_INIT(&table_opts.init_nodes);
1377                 }
1378                     table_opts_l
1379                         { $$ = table_opts; }
1380                 | /* empty */
1381                         {
1382                         bzero(&table_opts, sizeof table_opts);
1383                         SIMPLEQ_INIT(&table_opts.init_nodes);
1384                         $$ = table_opts;
1385                 }
1386                 ;
1387
1388 table_opts_l    : table_opts_l table_opt
1389                 | table_opt
1390                 ;
1391
1392 table_opt       : STRING                {
1393                         if (!strcmp($1, "const"))
1394                                 table_opts.flags |= PFR_TFLAG_CONST;
1395                         else if (!strcmp($1, "persist"))
1396                                 table_opts.flags |= PFR_TFLAG_PERSIST;
1397                         else if (!strcmp($1, "counters"))
1398                                 table_opts.flags |= PFR_TFLAG_COUNTERS;
1399                         else {
1400                                 yyerror("invalid table option '%s'", $1);
1401                                 free($1);
1402                                 YYERROR;
1403                         }
1404                         free($1);
1405                 }
1406                 | '{' optnl '}'         { table_opts.init_addr = 1; }
1407                 | '{' optnl host_list '}'       {
1408                         struct node_host        *n;
1409                         struct node_tinit       *ti;
1410
1411                         for (n = $3; n != NULL; n = n->next) {
1412                                 switch (n->addr.type) {
1413                                 case PF_ADDR_ADDRMASK:
1414                                         continue; /* ok */
1415                                 case PF_ADDR_RANGE:
1416                                         yyerror("address ranges are not "
1417                                             "permitted inside tables");
1418                                         break;
1419                                 case PF_ADDR_DYNIFTL:
1420                                         yyerror("dynamic addresses are not "
1421                                             "permitted inside tables");
1422                                         break;
1423                                 case PF_ADDR_TABLE:
1424                                         yyerror("tables cannot contain tables");
1425                                         break;
1426                                 case PF_ADDR_NOROUTE:
1427                                         yyerror("\"no-route\" is not permitted "
1428                                             "inside tables");
1429                                         break;
1430                                 case PF_ADDR_URPFFAILED:
1431                                         yyerror("\"urpf-failed\" is not "
1432                                             "permitted inside tables");
1433                                         break;
1434                                 default:
1435                                         yyerror("unknown address type %d",
1436                                             n->addr.type);
1437                                 }
1438                                 YYERROR;
1439                         }
1440                         if (!(ti = calloc(1, sizeof(*ti))))
1441                                 err(1, "table_opt: calloc");
1442                         ti->host = $3;
1443                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1444                             entries);
1445                         table_opts.init_addr = 1;
1446                 }
1447                 | FILENAME STRING       {
1448                         struct node_tinit       *ti;
1449
1450                         if (!(ti = calloc(1, sizeof(*ti))))
1451                                 err(1, "table_opt: calloc");
1452                         ti->file = $2;
1453                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1454                             entries);
1455                         table_opts.init_addr = 1;
1456                 }
1457                 ;
1458
1459 altqif          : ALTQ interface queue_opts QUEUE qassign {
1460                         struct pf_altq  a;
1461
1462                         if (check_rulestate(PFCTL_STATE_QUEUE))
1463                                 YYERROR;
1464
1465                         memset(&a, 0, sizeof(a));
1466                         if ($3.scheduler.qtype == ALTQT_NONE) {
1467                                 yyerror("no scheduler specified!");
1468                                 YYERROR;
1469                         }
1470                         a.scheduler = $3.scheduler.qtype;
1471                         a.qlimit = $3.qlimit;
1472                         a.tbrsize = $3.tbrsize;
1473                         if ($5 == NULL) {
1474                                 yyerror("no child queues specified");
1475                                 YYERROR;
1476                         }
1477                         if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1478                             &$3.scheduler))
1479                                 YYERROR;
1480                 }
1481                 ;
1482
1483 queuespec       : QUEUE STRING interface queue_opts qassign {
1484                         struct pf_altq  a;
1485
1486                         if (check_rulestate(PFCTL_STATE_QUEUE)) {
1487                                 free($2);
1488                                 YYERROR;
1489                         }
1490
1491                         memset(&a, 0, sizeof(a));
1492
1493                         if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1494                             sizeof(a.qname)) {
1495                                 yyerror("queue name too long (max "
1496                                     "%d chars)", PF_QNAME_SIZE-1);
1497                                 free($2);
1498                                 YYERROR;
1499                         }
1500                         free($2);
1501                         if ($4.tbrsize) {
1502                                 yyerror("cannot specify tbrsize for queue");
1503                                 YYERROR;
1504                         }
1505                         if ($4.priority > 255) {
1506                                 yyerror("priority out of range: max 255");
1507                                 YYERROR;
1508                         }
1509                         a.priority = $4.priority;
1510                         a.qlimit = $4.qlimit;
1511                         a.scheduler = $4.scheduler.qtype;
1512                         if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1513                             &$4.scheduler)) {
1514                                 yyerror("errors in queue definition");
1515                                 YYERROR;
1516                         }
1517                 }
1518                 ;
1519
1520 queue_opts      :       {
1521                         bzero(&queue_opts, sizeof queue_opts);
1522                         queue_opts.priority = DEFAULT_PRIORITY;
1523                         queue_opts.qlimit = DEFAULT_QLIMIT;
1524                         queue_opts.scheduler.qtype = ALTQT_NONE;
1525                         queue_opts.queue_bwspec.bw_percent = 100;
1526                 }
1527                     queue_opts_l
1528                         { $$ = queue_opts; }
1529                 | /* empty */ {
1530                         bzero(&queue_opts, sizeof queue_opts);
1531                         queue_opts.priority = DEFAULT_PRIORITY;
1532                         queue_opts.qlimit = DEFAULT_QLIMIT;
1533                         queue_opts.scheduler.qtype = ALTQT_NONE;
1534                         queue_opts.queue_bwspec.bw_percent = 100;
1535                         $$ = queue_opts;
1536                 }
1537                 ;
1538
1539 queue_opts_l    : queue_opts_l queue_opt
1540                 | queue_opt
1541                 ;
1542
1543 queue_opt       : BANDWIDTH bandwidth   {
1544                         if (queue_opts.marker & QOM_BWSPEC) {
1545                                 yyerror("bandwidth cannot be respecified");
1546                                 YYERROR;
1547                         }
1548                         queue_opts.marker |= QOM_BWSPEC;
1549                         queue_opts.queue_bwspec = $2;
1550                 }
1551                 | PRIORITY NUMBER       {
1552                         if (queue_opts.marker & QOM_PRIORITY) {
1553                                 yyerror("priority cannot be respecified");
1554                                 YYERROR;
1555                         }
1556                         if ($2 < 0 || $2 > 255) {
1557                                 yyerror("priority out of range: max 255");
1558                                 YYERROR;
1559                         }
1560                         queue_opts.marker |= QOM_PRIORITY;
1561                         queue_opts.priority = $2;
1562                 }
1563                 | QLIMIT NUMBER {
1564                         if (queue_opts.marker & QOM_QLIMIT) {
1565                                 yyerror("qlimit cannot be respecified");
1566                                 YYERROR;
1567                         }
1568                         if ($2 < 0 || $2 > 65535) {
1569                                 yyerror("qlimit out of range: max 65535");
1570                                 YYERROR;
1571                         }
1572                         queue_opts.marker |= QOM_QLIMIT;
1573                         queue_opts.qlimit = $2;
1574                 }
1575                 | scheduler     {
1576                         if (queue_opts.marker & QOM_SCHEDULER) {
1577                                 yyerror("scheduler cannot be respecified");
1578                                 YYERROR;
1579                         }
1580                         queue_opts.marker |= QOM_SCHEDULER;
1581                         queue_opts.scheduler = $1;
1582                 }
1583                 | TBRSIZE NUMBER        {
1584                         if (queue_opts.marker & QOM_TBRSIZE) {
1585                                 yyerror("tbrsize cannot be respecified");
1586                                 YYERROR;
1587                         }
1588                         if ($2 < 0 || $2 > 65535) {
1589                                 yyerror("tbrsize too big: max 65535");
1590                                 YYERROR;
1591                         }
1592                         queue_opts.marker |= QOM_TBRSIZE;
1593                         queue_opts.tbrsize = $2;
1594                 }
1595                 ;
1596
1597 bandwidth       : STRING {
1598                         double   bps;
1599                         char    *cp;
1600
1601                         $$.bw_percent = 0;
1602
1603                         bps = strtod($1, &cp);
1604                         if (cp != NULL) {
1605                                 if (!strcmp(cp, "b"))
1606                                         ; /* nothing */
1607                                 else if (!strcmp(cp, "Kb"))
1608                                         bps *= 1000;
1609                                 else if (!strcmp(cp, "Mb"))
1610                                         bps *= 1000 * 1000;
1611                                 else if (!strcmp(cp, "Gb"))
1612                                         bps *= 1000 * 1000 * 1000;
1613                                 else if (!strcmp(cp, "%")) {
1614                                         if (bps < 0 || bps > 100) {
1615                                                 yyerror("bandwidth spec "
1616                                                     "out of range");
1617                                                 free($1);
1618                                                 YYERROR;
1619                                         }
1620                                         $$.bw_percent = bps;
1621                                         bps = 0;
1622                                 } else {
1623                                         yyerror("unknown unit %s", cp);
1624                                         free($1);
1625                                         YYERROR;
1626                                 }
1627                         }
1628                         free($1);
1629                         $$.bw_absolute = (u_int32_t)bps;
1630                 }
1631                 | NUMBER {
1632                         if ($1 < 0 || $1 > UINT_MAX) {
1633                                 yyerror("bandwidth number too big");
1634                                 YYERROR;
1635                         }
1636                         $$.bw_percent = 0;
1637                         $$.bw_absolute = $1;
1638                 }
1639                 ;
1640
1641 scheduler       : CBQ                           {
1642                         $$.qtype = ALTQT_CBQ;
1643                         $$.data.cbq_opts.flags = 0;
1644                 }
1645                 | CBQ '(' cbqflags_list ')'     {
1646                         $$.qtype = ALTQT_CBQ;
1647                         $$.data.cbq_opts.flags = $3;
1648                 }
1649                 | PRIQ                          {
1650                         $$.qtype = ALTQT_PRIQ;
1651                         $$.data.priq_opts.flags = 0;
1652                 }
1653                 | PRIQ '(' priqflags_list ')'   {
1654                         $$.qtype = ALTQT_PRIQ;
1655                         $$.data.priq_opts.flags = $3;
1656                 }
1657                 | HFSC                          {
1658                         $$.qtype = ALTQT_HFSC;
1659                         bzero(&$$.data.hfsc_opts,
1660                             sizeof(struct node_hfsc_opts));
1661                 }
1662                 | HFSC '(' hfsc_opts ')'        {
1663                         $$.qtype = ALTQT_HFSC;
1664                         $$.data.hfsc_opts = $3;
1665                 }
1666                 | FAIRQ                         {
1667                         $$.qtype = ALTQT_FAIRQ;
1668                         bzero(&$$.data.fairq_opts,
1669                                 sizeof(struct node_fairq_opts));
1670                 }
1671                 | FAIRQ '(' fairq_opts ')'      {
1672                         $$.qtype = ALTQT_FAIRQ;
1673                         $$.data.fairq_opts = $3;
1674                 }
1675                 ;
1676
1677 cbqflags_list   : cbqflags_item                         { $$ |= $1; }
1678                 | cbqflags_list comma cbqflags_item     { $$ |= $3; }
1679                 ;
1680
1681 cbqflags_item   : STRING        {
1682                         if (!strcmp($1, "default"))
1683                                 $$ = CBQCLF_DEFCLASS;
1684                         else if (!strcmp($1, "borrow"))
1685                                 $$ = CBQCLF_BORROW;
1686                         else if (!strcmp($1, "red"))
1687                                 $$ = CBQCLF_RED;
1688                         else if (!strcmp($1, "ecn"))
1689                                 $$ = CBQCLF_RED|CBQCLF_ECN;
1690                         else if (!strcmp($1, "rio"))
1691                                 $$ = CBQCLF_RIO;
1692                         else {
1693                                 yyerror("unknown cbq flag \"%s\"", $1);
1694                                 free($1);
1695                                 YYERROR;
1696                         }
1697                         free($1);
1698                 }
1699                 ;
1700
1701 priqflags_list  : priqflags_item                        { $$ |= $1; }
1702                 | priqflags_list comma priqflags_item   { $$ |= $3; }
1703                 ;
1704
1705 priqflags_item  : STRING        {
1706                         if (!strcmp($1, "default"))
1707                                 $$ = PRCF_DEFAULTCLASS;
1708                         else if (!strcmp($1, "red"))
1709                                 $$ = PRCF_RED;
1710                         else if (!strcmp($1, "ecn"))
1711                                 $$ = PRCF_RED|PRCF_ECN;
1712                         else if (!strcmp($1, "rio"))
1713                                 $$ = PRCF_RIO;
1714                         else {
1715                                 yyerror("unknown priq flag \"%s\"", $1);
1716                                 free($1);
1717                                 YYERROR;
1718                         }
1719                         free($1);
1720                 }
1721                 ;
1722
1723 hfsc_opts       :       {
1724                                 bzero(&hfsc_opts,
1725                                     sizeof(struct node_hfsc_opts));
1726                         }
1727                     hfscopts_list                               {
1728                         $$ = hfsc_opts;
1729                 }
1730                 ;
1731
1732 hfscopts_list   : hfscopts_item
1733                 | hfscopts_list comma hfscopts_item
1734                 ;
1735
1736 hfscopts_item   : LINKSHARE bandwidth                           {
1737                         if (hfsc_opts.linkshare.used) {
1738                                 yyerror("linkshare already specified");
1739                                 YYERROR;
1740                         }
1741                         hfsc_opts.linkshare.m2 = $2;
1742                         hfsc_opts.linkshare.used = 1;
1743                 }
1744                 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1745                     {
1746                         if ($5 < 0 || $5 > INT_MAX) {
1747                                 yyerror("timing in curve out of range");
1748                                 YYERROR;
1749                         }
1750                         if (hfsc_opts.linkshare.used) {
1751                                 yyerror("linkshare already specified");
1752                                 YYERROR;
1753                         }
1754                         hfsc_opts.linkshare.m1 = $3;
1755                         hfsc_opts.linkshare.d = $5;
1756                         hfsc_opts.linkshare.m2 = $7;
1757                         hfsc_opts.linkshare.used = 1;
1758                 }
1759                 | REALTIME bandwidth                            {
1760                         if (hfsc_opts.realtime.used) {
1761                                 yyerror("realtime already specified");
1762                                 YYERROR;
1763                         }
1764                         hfsc_opts.realtime.m2 = $2;
1765                         hfsc_opts.realtime.used = 1;
1766                 }
1767                 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1768                     {
1769                         if ($5 < 0 || $5 > INT_MAX) {
1770                                 yyerror("timing in curve out of range");
1771                                 YYERROR;
1772                         }
1773                         if (hfsc_opts.realtime.used) {
1774                                 yyerror("realtime already specified");
1775                                 YYERROR;
1776                         }
1777                         hfsc_opts.realtime.m1 = $3;
1778                         hfsc_opts.realtime.d = $5;
1779                         hfsc_opts.realtime.m2 = $7;
1780                         hfsc_opts.realtime.used = 1;
1781                 }
1782                 | UPPERLIMIT bandwidth                          {
1783                         if (hfsc_opts.upperlimit.used) {
1784                                 yyerror("upperlimit already specified");
1785                                 YYERROR;
1786                         }
1787                         hfsc_opts.upperlimit.m2 = $2;
1788                         hfsc_opts.upperlimit.used = 1;
1789                 }
1790                 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1791                     {
1792                         if ($5 < 0 || $5 > INT_MAX) {
1793                                 yyerror("timing in curve out of range");
1794                                 YYERROR;
1795                         }
1796                         if (hfsc_opts.upperlimit.used) {
1797                                 yyerror("upperlimit already specified");
1798                                 YYERROR;
1799                         }
1800                         hfsc_opts.upperlimit.m1 = $3;
1801                         hfsc_opts.upperlimit.d = $5;
1802                         hfsc_opts.upperlimit.m2 = $7;
1803                         hfsc_opts.upperlimit.used = 1;
1804                 }
1805                 | STRING        {
1806                         if (!strcmp($1, "default"))
1807                                 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1808                         else if (!strcmp($1, "red"))
1809                                 hfsc_opts.flags |= HFCF_RED;
1810                         else if (!strcmp($1, "ecn"))
1811                                 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1812                         else if (!strcmp($1, "rio"))
1813                                 hfsc_opts.flags |= HFCF_RIO;
1814                         else {
1815                                 yyerror("unknown hfsc flag \"%s\"", $1);
1816                                 free($1);
1817                                 YYERROR;
1818                         }
1819                         free($1);
1820                 }
1821                 ;
1822
1823 fairq_opts      :       {
1824                                 bzero(&fairq_opts,
1825                                     sizeof(struct node_fairq_opts));
1826                         }
1827                     fairqopts_list                              {
1828                         $$ = fairq_opts;
1829                 }
1830                 ;
1831
1832 fairqopts_list  : fairqopts_item
1833                 | fairqopts_list comma fairqopts_item
1834                 ;
1835
1836 fairqopts_item  : LINKSHARE bandwidth                           {
1837                         if (fairq_opts.linkshare.used) {
1838                                 yyerror("linkshare already specified");
1839                                 YYERROR;
1840                         }
1841                         fairq_opts.linkshare.m2 = $2;
1842                         fairq_opts.linkshare.used = 1;
1843                 }
1844                 | LINKSHARE '(' bandwidth number bandwidth ')'  {
1845                         if (fairq_opts.linkshare.used) {
1846                                 yyerror("linkshare already specified");
1847                                 YYERROR;
1848                         }
1849                         fairq_opts.linkshare.m1 = $3;
1850                         fairq_opts.linkshare.d = $4;
1851                         fairq_opts.linkshare.m2 = $5;
1852                         fairq_opts.linkshare.used = 1;
1853                 }
1854                 | HOGS bandwidth {
1855                         fairq_opts.hogs_bw = $2;
1856                 }
1857                 | BUCKETS number {
1858                         fairq_opts.nbuckets = $2;
1859                 }
1860                 | STRING        {
1861                         if (!strcmp($1, "default"))
1862                                 fairq_opts.flags |= FARF_DEFAULTCLASS;
1863                         else if (!strcmp($1, "red"))
1864                                 fairq_opts.flags |= FARF_RED;
1865                         else if (!strcmp($1, "ecn"))
1866                                 fairq_opts.flags |= FARF_RED|FARF_ECN;
1867                         else if (!strcmp($1, "rio"))
1868                                 fairq_opts.flags |= FARF_RIO;
1869                         else {
1870                                 yyerror("unknown fairq flag \"%s\"", $1);
1871                                 free($1);
1872                                 YYERROR;
1873                         }
1874                         free($1);
1875                 }
1876                 ;
1877
1878 qassign         : /* empty */           { $$ = NULL; }
1879                 | qassign_item          { $$ = $1; }
1880                 | '{' optnl qassign_list '}'    { $$ = $3; }
1881                 ;
1882
1883 qassign_list    : qassign_item optnl            { $$ = $1; }
1884                 | qassign_list comma qassign_item optnl {
1885                         $1->tail->next = $3;
1886                         $1->tail = $3;
1887                         $$ = $1;
1888                 }
1889                 ;
1890
1891 qassign_item    : STRING                        {
1892                         $$ = calloc(1, sizeof(struct node_queue));
1893                         if ($$ == NULL)
1894                                 err(1, "qassign_item: calloc");
1895                         if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
1896                             sizeof($$->queue)) {
1897                                 yyerror("queue name '%s' too long (max "
1898                                     "%d chars)", $1, sizeof($$->queue)-1);
1899                                 free($1);
1900                                 free($$);
1901                                 YYERROR;
1902                         }
1903                         free($1);
1904                         $$->next = NULL;
1905                         $$->tail = $$;
1906                 }
1907                 ;
1908
1909 pfrule          : action dir logquick interface route af proto fromto
1910                     filter_opts
1911                 {
1912                         struct pf_rule           r;
1913                         struct node_state_opt   *o;
1914                         struct node_proto       *proto;
1915                         int                      srctrack = 0;
1916                         int                      statelock = 0;
1917                         int                      adaptive = 0;
1918                         int                      defaults = 0;
1919
1920                         if (check_rulestate(PFCTL_STATE_FILTER))
1921                                 YYERROR;
1922
1923                         memset(&r, 0, sizeof(r));
1924
1925                         r.action = $1.b1;
1926                         switch ($1.b2) {
1927                         case PFRULE_RETURNRST:
1928                                 r.rule_flag |= PFRULE_RETURNRST;
1929                                 r.return_ttl = $1.w;
1930                                 break;
1931                         case PFRULE_RETURNICMP:
1932                                 r.rule_flag |= PFRULE_RETURNICMP;
1933                                 r.return_icmp = $1.w;
1934                                 r.return_icmp6 = $1.w2;
1935                                 break;
1936                         case PFRULE_RETURN:
1937                                 r.rule_flag |= PFRULE_RETURN;
1938                                 r.return_icmp = $1.w;
1939                                 r.return_icmp6 = $1.w2;
1940                                 break;
1941                         }
1942                         r.direction = $2;
1943                         r.log = $3.log;
1944                         r.logif = $3.logif;
1945                         r.quick = $3.quick;
1946                         r.prob = $9.prob;
1947                         r.rtableid = $9.rtableid;
1948
1949                         r.af = $6;
1950                         if ($9.tag)
1951                                 if (strlcpy(r.tagname, $9.tag,
1952                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1953                                         yyerror("tag too long, max %u chars",
1954                                             PF_TAG_NAME_SIZE - 1);
1955                                         YYERROR;
1956                                 }
1957                         if ($9.match_tag)
1958                                 if (strlcpy(r.match_tagname, $9.match_tag,
1959                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1960                                         yyerror("tag too long, max %u chars",
1961                                             PF_TAG_NAME_SIZE - 1);
1962                                         YYERROR;
1963                                 }
1964                         r.match_tag_not = $9.match_tag_not;
1965                         if (rule_label(&r, $9.label))
1966                                 YYERROR;
1967                         free($9.label);
1968                         r.flags = $9.flags.b1;
1969                         r.flagset = $9.flags.b2;
1970                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
1971                                 yyerror("flags always false");
1972                                 YYERROR;
1973                         }
1974                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
1975                                 for (proto = $7; proto != NULL &&
1976                                     proto->proto != IPPROTO_TCP;
1977                                     proto = proto->next)
1978                                         ;       /* nothing */
1979                                 if (proto == NULL && $7 != NULL) {
1980                                         if ($9.flags.b1 || $9.flags.b2)
1981                                                 yyerror(
1982                                                     "flags only apply to tcp");
1983                                         if ($8.src_os)
1984                                                 yyerror(
1985                                                     "OS fingerprinting only "
1986                                                     "apply to tcp");
1987                                         YYERROR;
1988                                 }
1989 #if 0
1990                                 if (($9.flags.b1 & parse_flags("S")) == 0 &&
1991                                     $8.src_os) {
1992                                         yyerror("OS fingerprinting requires "
1993                                             "the SYN TCP flag (flags S/SA)");
1994                                         YYERROR;
1995                                 }
1996 #endif
1997                         }
1998
1999                         r.tos = $9.tos;
2000                         r.keep_state = $9.keep.action;
2001                         o = $9.keep.options;
2002
2003                         /* 'keep state' by default on pass rules. */
2004                         if (!r.keep_state && !r.action &&
2005                             !($9.marker & FOM_KEEP)) {
2006                                 r.keep_state = PF_STATE_NORMAL;
2007                                 o = keep_state_defaults;
2008                                 defaults = 1;
2009                         }
2010
2011                         while (o) {
2012                                 struct node_state_opt   *p = o;
2013
2014                                 switch (o->type) {
2015                                 case PF_STATE_OPT_MAX:
2016                                         if (r.max_states) {
2017                                                 yyerror("state option 'max' "
2018                                                     "multiple definitions");
2019                                                 YYERROR;
2020                                         }
2021                                         r.max_states = o->data.max_states;
2022                                         break;
2023                                 case PF_STATE_OPT_NOSYNC:
2024                                         if (r.rule_flag & PFRULE_NOSYNC) {
2025                                                 yyerror("state option 'sync' "
2026                                                     "multiple definitions");
2027                                                 YYERROR;
2028                                         }
2029                                         r.rule_flag |= PFRULE_NOSYNC;
2030                                         break;
2031                                 case PF_STATE_OPT_SRCTRACK:
2032                                         if (srctrack) {
2033                                                 yyerror("state option "
2034                                                     "'source-track' "
2035                                                     "multiple definitions");
2036                                                 YYERROR;
2037                                         }
2038                                         srctrack =  o->data.src_track;
2039                                         r.rule_flag |= PFRULE_SRCTRACK;
2040                                         break;
2041                                 case PF_STATE_OPT_MAX_SRC_STATES:
2042                                         if (r.max_src_states) {
2043                                                 yyerror("state option "
2044                                                     "'max-src-states' "
2045                                                     "multiple definitions");
2046                                                 YYERROR;
2047                                         }
2048                                         if (o->data.max_src_states == 0) {
2049                                                 yyerror("'max-src-states' must "
2050                                                     "be > 0");
2051                                                 YYERROR;
2052                                         }
2053                                         r.max_src_states =
2054                                             o->data.max_src_states;
2055                                         r.rule_flag |= PFRULE_SRCTRACK;
2056                                         break;
2057                                 case PF_STATE_OPT_OVERLOAD:
2058                                         if (r.overload_tblname[0]) {
2059                                                 yyerror("multiple 'overload' "
2060                                                     "table definitions");
2061                                                 YYERROR;
2062                                         }
2063                                         if (strlcpy(r.overload_tblname,
2064                                             o->data.overload.tblname,
2065                                             PF_TABLE_NAME_SIZE) >=
2066                                             PF_TABLE_NAME_SIZE) {
2067                                                 yyerror("state option: "
2068                                                     "strlcpy");
2069                                                 YYERROR;
2070                                         }
2071                                         r.flush = o->data.overload.flush;
2072                                         break;
2073                                 case PF_STATE_OPT_MAX_SRC_CONN:
2074                                         if (r.max_src_conn) {
2075                                                 yyerror("state option "
2076                                                     "'max-src-conn' "
2077                                                     "multiple definitions");
2078                                                 YYERROR;
2079                                         }
2080                                         if (o->data.max_src_conn == 0) {
2081                                                 yyerror("'max-src-conn' "
2082                                                     "must be > 0");
2083                                                 YYERROR;
2084                                         }
2085                                         r.max_src_conn =
2086                                             o->data.max_src_conn;
2087                                         r.rule_flag |= PFRULE_SRCTRACK |
2088                                             PFRULE_RULESRCTRACK;
2089                                         break;
2090                                 case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2091                                         if (r.max_src_conn_rate.limit) {
2092                                                 yyerror("state option "
2093                                                     "'max-src-conn-rate' "
2094                                                     "multiple definitions");
2095                                                 YYERROR;
2096                                         }
2097                                         if (!o->data.max_src_conn_rate.limit ||
2098                                             !o->data.max_src_conn_rate.seconds) {
2099                                                 yyerror("'max-src-conn-rate' "
2100                                                     "values must be > 0");
2101                                                 YYERROR;
2102                                         }
2103                                         if (o->data.max_src_conn_rate.limit >
2104                                             PF_THRESHOLD_MAX) {
2105                                                 yyerror("'max-src-conn-rate' "
2106                                                     "maximum rate must be < %u",
2107                                                     PF_THRESHOLD_MAX);
2108                                                 YYERROR;
2109                                         }
2110                                         r.max_src_conn_rate.limit =
2111                                             o->data.max_src_conn_rate.limit;
2112                                         r.max_src_conn_rate.seconds =
2113                                             o->data.max_src_conn_rate.seconds;
2114                                         r.rule_flag |= PFRULE_SRCTRACK |
2115                                             PFRULE_RULESRCTRACK;
2116                                         break;
2117                                 case PF_STATE_OPT_MAX_SRC_NODES:
2118                                         if (r.max_src_nodes) {
2119                                                 yyerror("state option "
2120                                                     "'max-src-nodes' "
2121                                                     "multiple definitions");
2122                                                 YYERROR;
2123                                         }
2124                                         if (o->data.max_src_nodes == 0) {
2125                                                 yyerror("'max-src-nodes' must "
2126                                                     "be > 0");
2127                                                 YYERROR;
2128                                         }
2129                                         r.max_src_nodes =
2130                                             o->data.max_src_nodes;
2131                                         r.rule_flag |= PFRULE_SRCTRACK |
2132                                             PFRULE_RULESRCTRACK;
2133                                         break;
2134                                 case PF_STATE_OPT_STATELOCK:
2135                                         if (statelock) {
2136                                                 yyerror("state locking option: "
2137                                                     "multiple definitions");
2138                                                 YYERROR;
2139                                         }
2140                                         statelock = 1;
2141                                         r.rule_flag |= o->data.statelock;
2142                                         break;
2143                                 case PF_STATE_OPT_SLOPPY:
2144                                         if (r.rule_flag & PFRULE_STATESLOPPY) {
2145                                                 yyerror("state sloppy option: "
2146                                                     "multiple definitions");
2147                                                 YYERROR;
2148                                         }
2149                                         r.rule_flag |= PFRULE_STATESLOPPY;
2150                                         break;
2151                                 case PF_STATE_OPT_TIMEOUT:
2152                                         if (o->data.timeout.number ==
2153                                             PFTM_ADAPTIVE_START ||
2154                                             o->data.timeout.number ==
2155                                             PFTM_ADAPTIVE_END)
2156                                                 adaptive = 1;
2157                                         if (r.timeout[o->data.timeout.number]) {
2158                                                 yyerror("state timeout %s "
2159                                                     "multiple definitions",
2160                                                     pf_timeouts[o->data.
2161                                                     timeout.number].name);
2162                                                 YYERROR;
2163                                         }
2164                                         r.timeout[o->data.timeout.number] =
2165                                             o->data.timeout.seconds;
2166                                 }
2167                                 o = o->next;
2168                                 if (!defaults)
2169                                         free(p);
2170                         }
2171
2172                         /* 'flags S/SA' by default on stateful rules */
2173                         if (!r.action && !r.flags && !r.flagset &&
2174                             !$9.fragment && !($9.marker & FOM_FLAGS) &&
2175                             r.keep_state) {
2176                                 r.flags = parse_flags("S");
2177                                 r.flagset =  parse_flags("SA");
2178                         }
2179                         if (!adaptive && r.max_states) {
2180                                 r.timeout[PFTM_ADAPTIVE_START] =
2181                                     (r.max_states / 10) * 6;
2182                                 r.timeout[PFTM_ADAPTIVE_END] =
2183                                     (r.max_states / 10) * 12;
2184                         }
2185                         if (r.rule_flag & PFRULE_SRCTRACK) {
2186                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2187                                     r.max_src_nodes) {
2188                                         yyerror("'max-src-nodes' is "
2189                                             "incompatible with "
2190                                             "'source-track global'");
2191                                         YYERROR;
2192                                 }
2193                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2194                                     r.max_src_conn) {
2195                                         yyerror("'max-src-conn' is "
2196                                             "incompatible with "
2197                                             "'source-track global'");
2198                                         YYERROR;
2199                                 }
2200                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2201                                     r.max_src_conn_rate.seconds) {
2202                                         yyerror("'max-src-conn-rate' is "
2203                                             "incompatible with "
2204                                             "'source-track global'");
2205                                         YYERROR;
2206                                 }
2207                                 if (r.timeout[PFTM_SRC_NODE] <
2208                                     r.max_src_conn_rate.seconds)
2209                                         r.timeout[PFTM_SRC_NODE] =
2210                                             r.max_src_conn_rate.seconds;
2211                                 r.rule_flag |= PFRULE_SRCTRACK;
2212                                 if (srctrack == PF_SRCTRACK_RULE)
2213                                         r.rule_flag |= PFRULE_RULESRCTRACK;
2214                         }
2215                         if (r.keep_state && !statelock)
2216                                 r.rule_flag |= default_statelock;
2217
2218                         if ($9.fragment)
2219                                 r.rule_flag |= PFRULE_FRAGMENT;
2220                         r.allow_opts = $9.allowopts;
2221
2222                         decide_address_family($8.src.host, &r.af);
2223                         decide_address_family($8.dst.host, &r.af);
2224
2225                         if ($5.rt) {
2226                                 if (!r.direction) {
2227                                         yyerror("direction must be explicit "
2228                                             "with rules that specify routing");
2229                                         YYERROR;
2230                                 }
2231                                 r.rt = $5.rt;
2232                                 r.rpool.opts = $5.pool_opts;
2233                                 if ($5.key != NULL)
2234                                         memcpy(&r.rpool.key, $5.key,
2235                                             sizeof(struct pf_poolhashkey));
2236                         }
2237                         if (r.rt && r.rt != PF_FASTROUTE) {
2238                                 decide_address_family($5.host, &r.af);
2239                                 remove_invalid_hosts(&$5.host, &r.af);
2240                                 if ($5.host == NULL) {
2241                                         yyerror("no routing address with "
2242                                             "matching address family found.");
2243                                         YYERROR;
2244                                 }
2245                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2246                                     PF_POOL_NONE && ($5.host->next != NULL ||
2247                                     $5.host->addr.type == PF_ADDR_TABLE ||
2248                                     DYNIF_MULTIADDR($5.host->addr)))
2249                                         r.rpool.opts |= PF_POOL_ROUNDROBIN;
2250                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2251                                     PF_POOL_ROUNDROBIN &&
2252                                     disallow_table($5.host, "tables are only "
2253                                     "supported in round-robin routing pools"))
2254                                         YYERROR;
2255                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2256                                     PF_POOL_ROUNDROBIN &&
2257                                     disallow_alias($5.host, "interface (%s) "
2258                                     "is only supported in round-robin "
2259                                     "routing pools"))
2260                                         YYERROR;
2261                                 if ($5.host->next != NULL) {
2262                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2263                                             PF_POOL_ROUNDROBIN) {
2264                                                 yyerror("r.rpool.opts must "
2265                                                     "be PF_POOL_ROUNDROBIN");
2266                                                 YYERROR;
2267                                         }
2268                                 }
2269                         }
2270                         if ($9.queues.qname != NULL) {
2271                                 if (strlcpy(r.qname, $9.queues.qname,
2272                                     sizeof(r.qname)) >= sizeof(r.qname)) {
2273                                         yyerror("rule qname too long (max "
2274                                             "%d chars)", sizeof(r.qname)-1);
2275                                         YYERROR;
2276                                 }
2277                                 free($9.queues.qname);
2278                         }
2279                         if ($9.queues.pqname != NULL) {
2280                                 if (strlcpy(r.pqname, $9.queues.pqname,
2281                                     sizeof(r.pqname)) >= sizeof(r.pqname)) {
2282                                         yyerror("rule pqname too long (max "
2283                                             "%d chars)", sizeof(r.pqname)-1);
2284                                         YYERROR;
2285                                 }
2286                                 free($9.queues.pqname);
2287                         }
2288 #ifdef __FreeBSD__
2289                         r.divert.port = $9.divert.port;
2290 #else
2291                         if ((r.divert.port = $9.divert.port)) {
2292                                 if (r.direction == PF_OUT) {
2293                                         if ($9.divert.addr) {
2294                                                 yyerror("address specified "
2295                                                     "for outgoing divert");
2296                                                 YYERROR;
2297                                         }
2298                                         bzero(&r.divert.addr,
2299                                             sizeof(r.divert.addr));
2300                                 } else {
2301                                         if (!$9.divert.addr) {
2302                                                 yyerror("no address specified "
2303                                                     "for incoming divert");
2304                                                 YYERROR;
2305                                         }
2306                                         if ($9.divert.addr->af != r.af) {
2307                                                 yyerror("address family "
2308                                                     "mismatch for divert");
2309                                                 YYERROR;
2310                                         }
2311                                         r.divert.addr =
2312                                             $9.divert.addr->addr.v.a.addr;
2313                                 }
2314                         }
2315 #endif
2316
2317                         expand_rule(&r, $4, $5.host, $7, $8.src_os,
2318                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
2319                             $9.uid, $9.gid, $9.icmpspec, "");
2320                 }
2321                 ;
2322
2323 filter_opts     :       {
2324                                 bzero(&filter_opts, sizeof filter_opts);
2325                                 filter_opts.rtableid = -1;
2326                         }
2327                     filter_opts_l
2328                         { $$ = filter_opts; }
2329                 | /* empty */   {
2330                         bzero(&filter_opts, sizeof filter_opts);
2331                         filter_opts.rtableid = -1;
2332                         $$ = filter_opts;
2333                 }
2334                 ;
2335
2336 filter_opts_l   : filter_opts_l filter_opt
2337                 | filter_opt
2338                 ;
2339
2340 filter_opt      : USER uids {
2341                         if (filter_opts.uid)
2342                                 $2->tail->next = filter_opts.uid;
2343                         filter_opts.uid = $2;
2344                 }
2345                 | GROUP gids {
2346                         if (filter_opts.gid)
2347                                 $2->tail->next = filter_opts.gid;
2348                         filter_opts.gid = $2;
2349                 }
2350                 | flags {
2351                         if (filter_opts.marker & FOM_FLAGS) {
2352                                 yyerror("flags cannot be redefined");
2353                                 YYERROR;
2354                         }
2355                         filter_opts.marker |= FOM_FLAGS;
2356                         filter_opts.flags.b1 |= $1.b1;
2357                         filter_opts.flags.b2 |= $1.b2;
2358                         filter_opts.flags.w |= $1.w;
2359                         filter_opts.flags.w2 |= $1.w2;
2360                 }
2361                 | icmpspec {
2362                         if (filter_opts.marker & FOM_ICMP) {
2363                                 yyerror("icmp-type cannot be redefined");
2364                                 YYERROR;
2365                         }
2366                         filter_opts.marker |= FOM_ICMP;
2367                         filter_opts.icmpspec = $1;
2368                 }
2369                 | TOS tos {
2370                         if (filter_opts.marker & FOM_TOS) {
2371                                 yyerror("tos cannot be redefined");
2372                                 YYERROR;
2373                         }
2374                         filter_opts.marker |= FOM_TOS;
2375                         filter_opts.tos = $2;
2376                 }
2377                 | keep {
2378                         if (filter_opts.marker & FOM_KEEP) {
2379                                 yyerror("modulate or keep cannot be redefined");
2380                                 YYERROR;
2381                         }
2382                         filter_opts.marker |= FOM_KEEP;
2383                         filter_opts.keep.action = $1.action;
2384                         filter_opts.keep.options = $1.options;
2385                 }
2386                 | FRAGMENT {
2387                         filter_opts.fragment = 1;
2388                 }
2389                 | ALLOWOPTS {
2390                         filter_opts.allowopts = 1;
2391                 }
2392                 | label {
2393                         if (filter_opts.label) {
2394                                 yyerror("label cannot be redefined");
2395                                 YYERROR;
2396                         }
2397                         filter_opts.label = $1;
2398                 }
2399                 | qname {
2400                         if (filter_opts.queues.qname) {
2401                                 yyerror("queue cannot be redefined");
2402                                 YYERROR;
2403                         }
2404                         filter_opts.queues = $1;
2405                 }
2406                 | TAG string                            {
2407                         filter_opts.tag = $2;
2408                 }
2409                 | not TAGGED string                     {
2410                         filter_opts.match_tag = $3;
2411                         filter_opts.match_tag_not = $1;
2412                 }
2413                 | PROBABILITY probability               {
2414                         double  p;
2415
2416                         p = floor($2 * UINT_MAX + 0.5);
2417                         if (p < 0.0 || p > UINT_MAX) {
2418                                 yyerror("invalid probability: %lf", p);
2419                                 YYERROR;
2420                         }
2421                         filter_opts.prob = (u_int32_t)p;
2422                         if (filter_opts.prob == 0)
2423                                 filter_opts.prob = 1;
2424                 }
2425                 | RTABLE NUMBER                         {
2426                         if ($2 < 0 || $2 > rt_tableid_max()) {
2427                                 yyerror("invalid rtable id");
2428                                 YYERROR;
2429                         }
2430                         filter_opts.rtableid = $2;
2431                 }
2432                 | DIVERTTO portplain {
2433 #ifdef __FreeBSD__
2434                         filter_opts.divert.port = $2.a;
2435                         if (!filter_opts.divert.port) {
2436                                 yyerror("invalid divert port: %u", ntohs($2.a));
2437                                 YYERROR;
2438                         }
2439 #endif
2440                 }
2441                 | DIVERTTO STRING PORT portplain {
2442 #ifndef __FreeBSD__
2443                         if ((filter_opts.divert.addr = host($2)) == NULL) {
2444                                 yyerror("could not parse divert address: %s",
2445                                     $2);
2446                                 free($2);
2447                                 YYERROR;
2448                         }
2449 #else
2450                         if ($2)
2451 #endif
2452                         free($2);
2453                         filter_opts.divert.port = $4.a;
2454                         if (!filter_opts.divert.port) {
2455                                 yyerror("invalid divert port: %u", ntohs($4.a));
2456                                 YYERROR;
2457                         }
2458                 }
2459                 | DIVERTREPLY {
2460 #ifdef __FreeBSD__
2461                         yyerror("divert-reply has no meaning in FreeBSD pf(4)");
2462                         YYERROR;
2463 #else
2464                         filter_opts.divert.port = 1;    /* some random value */
2465 #endif
2466                 }
2467                 ;
2468
2469 probability     : STRING                                {
2470                         char    *e;
2471                         double   p = strtod($1, &e);
2472
2473                         if (*e == '%') {
2474                                 p *= 0.01;
2475                                 e++;
2476                         }
2477                         if (*e) {
2478                                 yyerror("invalid probability: %s", $1);
2479                                 free($1);
2480                                 YYERROR;
2481                         }
2482                         free($1);
2483                         $$ = p;
2484                 }
2485                 | NUMBER                                {
2486                         $$ = (double)$1;
2487                 }
2488                 ;
2489
2490
2491 action          : PASS                  { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; }
2492                 | BLOCK blockspec       { $$ = $2; $$.b1 = PF_DROP; }
2493                 ;
2494
2495 blockspec       : /* empty */           {
2496                         $$.b2 = blockpolicy;
2497                         $$.w = returnicmpdefault;
2498                         $$.w2 = returnicmp6default;
2499                 }
2500                 | DROP                  {
2501                         $$.b2 = PFRULE_DROP;
2502                         $$.w = 0;
2503                         $$.w2 = 0;
2504                 }
2505                 | RETURNRST             {
2506                         $$.b2 = PFRULE_RETURNRST;
2507                         $$.w = 0;
2508                         $$.w2 = 0;
2509                 }
2510                 | RETURNRST '(' TTL NUMBER ')'  {
2511                         if ($4 < 0 || $4 > 255) {
2512                                 yyerror("illegal ttl value %d", $4);
2513                                 YYERROR;
2514                         }
2515                         $$.b2 = PFRULE_RETURNRST;
2516                         $$.w = $4;
2517                         $$.w2 = 0;
2518                 }
2519                 | RETURNICMP            {
2520                         $$.b2 = PFRULE_RETURNICMP;
2521                         $$.w = returnicmpdefault;
2522                         $$.w2 = returnicmp6default;
2523                 }
2524                 | RETURNICMP6           {
2525                         $$.b2 = PFRULE_RETURNICMP;
2526                         $$.w = returnicmpdefault;
2527                         $$.w2 = returnicmp6default;
2528                 }
2529                 | RETURNICMP '(' reticmpspec ')'        {
2530                         $$.b2 = PFRULE_RETURNICMP;
2531                         $$.w = $3;
2532                         $$.w2 = returnicmpdefault;
2533                 }
2534                 | RETURNICMP6 '(' reticmp6spec ')'      {
2535                         $$.b2 = PFRULE_RETURNICMP;
2536                         $$.w = returnicmpdefault;
2537                         $$.w2 = $3;
2538                 }
2539                 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2540                         $$.b2 = PFRULE_RETURNICMP;
2541                         $$.w = $3;
2542                         $$.w2 = $5;
2543                 }
2544                 | RETURN {
2545                         $$.b2 = PFRULE_RETURN;
2546                         $$.w = returnicmpdefault;
2547                         $$.w2 = returnicmp6default;
2548                 }
2549                 ;
2550
2551 reticmpspec     : STRING                        {
2552                         if (!($$ = parseicmpspec($1, AF_INET))) {
2553                                 free($1);
2554                                 YYERROR;
2555                         }
2556                         free($1);
2557                 }
2558                 | NUMBER                        {
2559                         u_int8_t                icmptype;
2560
2561                         if ($1 < 0 || $1 > 255) {
2562                                 yyerror("invalid icmp code %lu", $1);
2563                                 YYERROR;
2564                         }
2565                         icmptype = returnicmpdefault >> 8;
2566                         $$ = (icmptype << 8 | $1);
2567                 }
2568                 ;
2569
2570 reticmp6spec    : STRING                        {
2571                         if (!($$ = parseicmpspec($1, AF_INET6))) {
2572                                 free($1);
2573                                 YYERROR;
2574                         }
2575                         free($1);
2576                 }
2577                 | NUMBER                        {
2578                         u_int8_t                icmptype;
2579
2580                         if ($1 < 0 || $1 > 255) {
2581                                 yyerror("invalid icmp code %lu", $1);
2582                                 YYERROR;
2583                         }
2584                         icmptype = returnicmp6default >> 8;
2585                         $$ = (icmptype << 8 | $1);
2586                 }
2587                 ;
2588
2589 dir             : /* empty */                   { $$ = PF_INOUT; }
2590                 | IN                            { $$ = PF_IN; }
2591                 | OUT                           { $$ = PF_OUT; }
2592                 ;
2593
2594 quick           : /* empty */                   { $$.quick = 0; }
2595                 | QUICK                         { $$.quick = 1; }
2596                 ;
2597
2598 logquick        : /* empty */   { $$.log = 0; $$.quick = 0; $$.logif = 0; }
2599                 | log           { $$ = $1; $$.quick = 0; }
2600                 | QUICK         { $$.quick = 1; $$.log = 0; $$.logif = 0; }
2601                 | log QUICK     { $$ = $1; $$.quick = 1; }
2602                 | QUICK log     { $$ = $2; $$.quick = 1; }
2603                 ;
2604
2605 log             : LOG                   { $$.log = PF_LOG; $$.logif = 0; }
2606                 | LOG '(' logopts ')'   {
2607                         $$.log = PF_LOG | $3.log;
2608                         $$.logif = $3.logif;
2609                 }
2610                 ;
2611
2612 logopts         : logopt                        { $$ = $1; }
2613                 | logopts comma logopt          {
2614                         $$.log = $1.log | $3.log;
2615                         $$.logif = $3.logif;
2616                         if ($$.logif == 0)
2617                                 $$.logif = $1.logif;
2618                 }
2619                 ;
2620
2621 logopt          : ALL           { $$.log = PF_LOG_ALL; $$.logif = 0; }
2622                 | USER          { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2623                 | GROUP         { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2624                 | TO string     {
2625                         const char      *errstr;
2626                         u_int            i;
2627
2628                         $$.log = 0;
2629                         if (strncmp($2, "pflog", 5)) {
2630                                 yyerror("%s: should be a pflog interface", $2);
2631                                 free($2);
2632                                 YYERROR;
2633                         }
2634                         i = strtonum($2 + 5, 0, 255, &errstr);
2635                         if (errstr) {
2636                                 yyerror("%s: %s", $2, errstr);
2637                                 free($2);
2638                                 YYERROR;
2639                         }
2640                         free($2);
2641                         $$.logif = i;
2642                 }
2643                 ;
2644
2645 interface       : /* empty */                   { $$ = NULL; }
2646                 | ON if_item_not                { $$ = $2; }
2647                 | ON '{' optnl if_list '}'      { $$ = $4; }
2648                 ;
2649
2650 if_list         : if_item_not optnl             { $$ = $1; }
2651                 | if_list comma if_item_not optnl       {
2652                         $1->tail->next = $3;
2653                         $1->tail = $3;
2654                         $$ = $1;
2655                 }
2656                 ;
2657
2658 if_item_not     : not if_item                   { $$ = $2; $$->not = $1; }
2659                 ;
2660
2661 if_item         : STRING                        {
2662                         struct node_host        *n;
2663
2664                         $$ = calloc(1, sizeof(struct node_if));
2665                         if ($$ == NULL)
2666                                 err(1, "if_item: calloc");
2667                         if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2668                             sizeof($$->ifname)) {
2669                                 free($1);
2670                                 free($$);
2671                                 yyerror("interface name too long");
2672                                 YYERROR;
2673                         }
2674
2675                         if ((n = ifa_exists($1)) != NULL)
2676                                 $$->ifa_flags = n->ifa_flags;
2677
2678                         free($1);
2679                         $$->not = 0;
2680                         $$->next = NULL;
2681                         $$->tail = $$;
2682                 }
2683                 ;
2684
2685 af              : /* empty */                   { $$ = 0; }
2686                 | INET                          { $$ = AF_INET; }
2687                 | INET6                         { $$ = AF_INET6; }
2688                 ;
2689
2690 proto           : /* empty */                           { $$ = NULL; }
2691                 | PROTO proto_item                      { $$ = $2; }
2692                 | PROTO '{' optnl proto_list '}'        { $$ = $4; }
2693                 ;
2694
2695 proto_list      : proto_item optnl              { $$ = $1; }
2696                 | proto_list comma proto_item optnl     {
2697                         $1->tail->next = $3;
2698                         $1->tail = $3;
2699                         $$ = $1;
2700                 }
2701                 ;
2702
2703 proto_item      : protoval                      {
2704                         u_int8_t        pr;
2705
2706                         pr = (u_int8_t)$1;
2707                         if (pr == 0) {
2708                                 yyerror("proto 0 cannot be used");
2709                                 YYERROR;
2710                         }
2711                         $$ = calloc(1, sizeof(struct node_proto));
2712                         if ($$ == NULL)
2713                                 err(1, "proto_item: calloc");
2714                         $$->proto = pr;
2715                         $$->next = NULL;
2716                         $$->tail = $$;
2717                 }
2718                 ;
2719
2720 protoval        : STRING                        {
2721                         struct protoent *p;
2722
2723                         p = getprotobyname($1);
2724                         if (p == NULL) {
2725                                 yyerror("unknown protocol %s", $1);
2726                                 free($1);
2727                                 YYERROR;
2728                         }
2729                         $$ = p->p_proto;
2730                         free($1);
2731                 }
2732                 | NUMBER                        {
2733                         if ($1 < 0 || $1 > 255) {
2734                                 yyerror("protocol outside range");
2735                                 YYERROR;
2736                         }
2737                 }
2738                 ;
2739
2740 fromto          : ALL                           {
2741                         $$.src.host = NULL;
2742                         $$.src.port = NULL;
2743                         $$.dst.host = NULL;
2744                         $$.dst.port = NULL;
2745                         $$.src_os = NULL;
2746                 }
2747                 | from os to                    {
2748                         $$.src = $1;
2749                         $$.src_os = $2;
2750                         $$.dst = $3;
2751                 }
2752                 ;
2753
2754 os              : /* empty */                   { $$ = NULL; }
2755                 | OS xos                        { $$ = $2; }
2756                 | OS '{' optnl os_list '}'      { $$ = $4; }
2757                 ;
2758
2759 xos             : STRING {
2760                         $$ = calloc(1, sizeof(struct node_os));
2761                         if ($$ == NULL)
2762                                 err(1, "os: calloc");
2763                         $$->os = $1;
2764                         $$->tail = $$;
2765                 }
2766                 ;
2767
2768 os_list         : xos optnl                     { $$ = $1; }
2769                 | os_list comma xos optnl       {
2770                         $1->tail->next = $3;
2771                         $1->tail = $3;
2772                         $$ = $1;
2773                 }
2774                 ;
2775
2776 from            : /* empty */                   {
2777                         $$.host = NULL;
2778                         $$.port = NULL;
2779                 }
2780                 | FROM ipportspec               {
2781                         $$ = $2;
2782                 }
2783                 ;
2784
2785 to              : /* empty */                   {
2786                         $$.host = NULL;
2787                         $$.port = NULL;
2788                 }
2789                 | TO ipportspec         {
2790                         if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
2791                             "not permitted in a destination address"))
2792                                 YYERROR;
2793                         $$ = $2;
2794                 }
2795                 ;
2796
2797 ipportspec      : ipspec                        {
2798                         $$.host = $1;
2799                         $$.port = NULL;
2800                 }
2801                 | ipspec PORT portspec          {
2802                         $$.host = $1;
2803                         $$.port = $3;
2804                 }
2805                 | PORT portspec                 {
2806                         $$.host = NULL;
2807                         $$.port = $2;
2808                 }
2809                 ;
2810
2811 optnl           : '\n' optnl
2812                 |
2813                 ;
2814
2815 ipspec          : ANY                           { $$ = NULL; }
2816                 | xhost                         { $$ = $1; }
2817                 | '{' optnl host_list '}'       { $$ = $3; }
2818                 ;
2819
2820 toipspec        : TO ipspec                     { $$ = $2; }
2821                 | /* empty */                   { $$ = NULL; }
2822                 ;
2823
2824 host_list       : ipspec optnl                  { $$ = $1; }
2825                 | host_list comma ipspec optnl  {
2826                         if ($3 == NULL)
2827                                 $$ = $1;
2828                         else if ($1 == NULL)
2829                                 $$ = $3;
2830                         else {
2831                                 $1->tail->next = $3;
2832                                 $1->tail = $3->tail;
2833                                 $$ = $1;
2834                         }
2835                 }
2836                 ;
2837
2838 xhost           : not host                      {
2839                         struct node_host        *n;
2840
2841                         for (n = $2; n != NULL; n = n->next)
2842                                 n->not = $1;
2843                         $$ = $2;
2844                 }
2845                 | not NOROUTE                   {
2846                         $$ = calloc(1, sizeof(struct node_host));
2847                         if ($$ == NULL)
2848                                 err(1, "xhost: calloc");
2849                         $$->addr.type = PF_ADDR_NOROUTE;
2850                         $$->next = NULL;
2851                         $$->not = $1;
2852                         $$->tail = $$;
2853                 }
2854                 | not URPFFAILED                {
2855                         $$ = calloc(1, sizeof(struct node_host));
2856                         if ($$ == NULL)
2857                                 err(1, "xhost: calloc");
2858                         $$->addr.type = PF_ADDR_URPFFAILED;
2859                         $$->next = NULL;
2860                         $$->not = $1;
2861                         $$->tail = $$;
2862                 }
2863                 ;
2864
2865 host            : STRING                        {
2866                         if (($$ = host($1)) == NULL)    {
2867                                 /* error. "any" is handled elsewhere */
2868                                 free($1);
2869                                 yyerror("could not parse host specification");
2870                                 YYERROR;
2871                         }
2872                         free($1);
2873
2874                 }
2875                 | STRING '-' STRING             {
2876                         struct node_host *b, *e;
2877
2878                         if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
2879                                 free($1);
2880                                 free($3);
2881                                 yyerror("could not parse host specification");
2882                                 YYERROR;
2883                         }
2884                         if (b->af != e->af ||
2885                             b->addr.type != PF_ADDR_ADDRMASK ||
2886                             e->addr.type != PF_ADDR_ADDRMASK ||
2887                             unmask(&b->addr.v.a.mask, b->af) !=
2888                             (b->af == AF_INET ? 32 : 128) ||
2889                             unmask(&e->addr.v.a.mask, e->af) !=
2890                             (e->af == AF_INET ? 32 : 128) ||
2891                             b->next != NULL || b->not ||
2892                             e->next != NULL || e->not) {
2893                                 free(b);
2894                                 free(e);
2895                                 free($1);
2896                                 free($3);
2897                                 yyerror("invalid address range");
2898                                 YYERROR;
2899                         }
2900                         memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
2901                             sizeof(b->addr.v.a.mask));
2902                         b->addr.type = PF_ADDR_RANGE;
2903                         $$ = b;
2904                         free(e);
2905                         free($1);
2906                         free($3);
2907                 }
2908                 | STRING '/' NUMBER             {
2909                         char    *buf;
2910
2911                         if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1)
2912                                 err(1, "host: asprintf");
2913                         free($1);
2914                         if (($$ = host(buf)) == NULL)   {
2915                                 /* error. "any" is handled elsewhere */
2916                                 free(buf);
2917                                 yyerror("could not parse host specification");
2918                                 YYERROR;
2919                         }
2920                         free(buf);
2921                 }
2922                 | NUMBER '/' NUMBER             {
2923                         char    *buf;
2924
2925                         /* ie. for 10/8 parsing */
2926 #ifdef __FreeBSD__
2927                         if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1)
2928 #else
2929                         if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
2930 #endif
2931                                 err(1, "host: asprintf");
2932                         if (($$ = host(buf)) == NULL)   {
2933                                 /* error. "any" is handled elsewhere */
2934                                 free(buf);
2935                                 yyerror("could not parse host specification");
2936                                 YYERROR;
2937                         }
2938                         free(buf);
2939                 }
2940                 | dynaddr
2941                 | dynaddr '/' NUMBER            {
2942                         struct node_host        *n;
2943
2944                         if ($3 < 0 || $3 > 128) {
2945                                 yyerror("bit number too big");
2946                                 YYERROR;
2947                         }
2948                         $$ = $1;
2949                         for (n = $1; n != NULL; n = n->next)
2950                                 set_ipmask(n, $3);
2951                 }
2952                 | '<' STRING '>'        {
2953                         if (strlen($2) >= PF_TABLE_NAME_SIZE) {
2954                                 yyerror("table name '%s' too long", $2);
2955                                 free($2);
2956                                 YYERROR;
2957                         }
2958                         $$ = calloc(1, sizeof(struct node_host));
2959                         if ($$ == NULL)
2960                                 err(1, "host: calloc");
2961                         $$->addr.type = PF_ADDR_TABLE;
2962                         if (strlcpy($$->addr.v.tblname, $2,
2963                             sizeof($$->addr.v.tblname)) >=
2964                             sizeof($$->addr.v.tblname))
2965                                 errx(1, "host: strlcpy");
2966                         free($2);
2967                         $$->next = NULL;
2968                         $$->tail = $$;
2969                 }
2970                 ;
2971
2972 number          : NUMBER
2973                 | STRING                {
2974                         u_long  ulval;
2975
2976                         if (atoul($1, &ulval) == -1) {
2977                                 yyerror("%s is not a number", $1);
2978                                 free($1);
2979                                 YYERROR;
2980                         } else
2981                                 $$ = ulval;
2982                         free($1);
2983                 }
2984                 ;
2985
2986 dynaddr         : '(' STRING ')'                {
2987                         int      flags = 0;
2988                         char    *p, *op;
2989
2990                         op = $2;
2991                         if (!isalpha(op[0])) {
2992                                 yyerror("invalid interface name '%s'", op);
2993                                 free(op);
2994                                 YYERROR;
2995                         }
2996                         while ((p = strrchr($2, ':')) != NULL) {
2997                                 if (!strcmp(p+1, "network"))
2998                                         flags |= PFI_AFLAG_NETWORK;
2999                                 else if (!strcmp(p+1, "broadcast"))
3000                                         flags |= PFI_AFLAG_BROADCAST;
3001                                 else if (!strcmp(p+1, "peer"))
3002                                         flags |= PFI_AFLAG_PEER;
3003                                 else if (!strcmp(p+1, "0"))
3004                                         flags |= PFI_AFLAG_NOALIAS;
3005                                 else {
3006                                         yyerror("interface %s has bad modifier",
3007                                             $2);
3008                                         free(op);
3009                                         YYERROR;
3010                                 }
3011                                 *p = '\0';
3012                         }
3013                         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3014                                 free(op);
3015                                 yyerror("illegal combination of "
3016                                     "interface modifiers");
3017                                 YYERROR;
3018                         }
3019                         $$ = calloc(1, sizeof(struct node_host));
3020                         if ($$ == NULL)
3021                                 err(1, "address: calloc");
3022                         $$->af = 0;
3023                         set_ipmask($$, 128);
3024                         $$->addr.type = PF_ADDR_DYNIFTL;
3025                         $$->addr.iflags = flags;
3026                         if (strlcpy($$->addr.v.ifname, $2,
3027                             sizeof($$->addr.v.ifname)) >=
3028                             sizeof($$->addr.v.ifname)) {
3029                                 free(op);
3030                                 free($$);
3031                                 yyerror("interface name too long");
3032                                 YYERROR;
3033                         }
3034                         free(op);
3035                         $$->next = NULL;
3036                         $$->tail = $$;
3037                 }
3038                 ;
3039
3040 portspec        : port_item                     { $$ = $1; }
3041                 | '{' optnl port_list '}'       { $$ = $3; }
3042                 ;
3043
3044 port_list       : port_item optnl               { $$ = $1; }
3045                 | port_list comma port_item optnl       {
3046                         $1->tail->next = $3;
3047                         $1->tail = $3;
3048                         $$ = $1;
3049                 }
3050                 ;
3051
3052 port_item       : portrange                     {
3053                         $$ = calloc(1, sizeof(struct node_port));
3054                         if ($$ == NULL)
3055                                 err(1, "port_item: calloc");
3056                         $$->port[0] = $1.a;
3057                         $$->port[1] = $1.b;
3058                         if ($1.t)
3059                                 $$->op = PF_OP_RRG;
3060                         else
3061                                 $$->op = PF_OP_EQ;
3062                         $$->next = NULL;
3063                         $$->tail = $$;
3064                 }
3065                 | unaryop portrange     {
3066                         if ($2.t) {
3067                                 yyerror("':' cannot be used with an other "
3068                                     "port operator");
3069                                 YYERROR;
3070                         }
3071                         $$ = calloc(1, sizeof(struct node_port));
3072                         if ($$ == NULL)
3073                                 err(1, "port_item: calloc");
3074                         $$->port[0] = $2.a;
3075                         $$->port[1] = $2.b;
3076                         $$->op = $1;
3077                         $$->next = NULL;
3078                         $$->tail = $$;
3079                 }
3080                 | portrange PORTBINARY portrange        {
3081                         if ($1.t || $3.t) {
3082                                 yyerror("':' cannot be used with an other "
3083                                     "port operator");
3084                                 YYERROR;
3085                         }
3086                         $$ = calloc(1, sizeof(struct node_port));
3087                         if ($$ == NULL)
3088                                 err(1, "port_item: calloc");
3089                         $$->port[0] = $1.a;
3090                         $$->port[1] = $3.a;
3091                         $$->op = $2;
3092                         $$->next = NULL;
3093                         $$->tail = $$;
3094                 }
3095                 ;
3096
3097 portplain       : numberstring                  {
3098                         if (parseport($1, &$$, 0) == -1) {
3099                                 free($1);
3100                                 YYERROR;
3101                         }
3102                         free($1);
3103                 }
3104                 ;
3105
3106 portrange       : numberstring                  {
3107                         if (parseport($1, &$$, PPORT_RANGE) == -1) {
3108                                 free($1);
3109                                 YYERROR;
3110                         }
3111                         free($1);
3112                 }
3113                 ;
3114
3115 uids            : uid_item                      { $$ = $1; }
3116                 | '{' optnl uid_list '}'        { $$ = $3; }
3117                 ;
3118
3119 uid_list        : uid_item optnl                { $$ = $1; }
3120                 | uid_list comma uid_item optnl {
3121                         $1->tail->next = $3;
3122                         $1->tail = $3;
3123                         $$ = $1;
3124                 }
3125                 ;
3126
3127 uid_item        : uid                           {
3128                         $$ = calloc(1, sizeof(struct node_uid));
3129                         if ($$ == NULL)
3130                                 err(1, "uid_item: calloc");
3131                         $$->uid[0] = $1;
3132                         $$->uid[1] = $1;
3133                         $$->op = PF_OP_EQ;
3134                         $$->next = NULL;
3135                         $$->tail = $$;
3136                 }
3137                 | unaryop uid                   {
3138                         if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3139                                 yyerror("user unknown requires operator = or "
3140                                     "!=");
3141                                 YYERROR;
3142                         }
3143                         $$ = calloc(1, sizeof(struct node_uid));
3144                         if ($$ == NULL)
3145                                 err(1, "uid_item: calloc");
3146                         $$->uid[0] = $2;
3147                         $$->uid[1] = $2;
3148                         $$->op = $1;
3149                         $$->next = NULL;
3150                         $$->tail = $$;
3151                 }
3152                 | uid PORTBINARY uid            {
3153                         if ($1 == UID_MAX || $3 == UID_MAX) {
3154                                 yyerror("user unknown requires operator = or "
3155                                     "!=");
3156                                 YYERROR;
3157                         }
3158                         $$ = calloc(1, sizeof(struct node_uid));
3159                         if ($$ == NULL)
3160                                 err(1, "uid_item: calloc");
3161                         $$->uid[0] = $1;
3162                         $$->uid[1] = $3;
3163                         $$->op = $2;
3164                         $$->next = NULL;
3165                         $$->tail = $$;
3166                 }
3167                 ;
3168
3169 uid             : STRING                        {
3170                         if (!strcmp($1, "unknown"))
3171                                 $$ = UID_MAX;
3172                         else {
3173                                 struct passwd   *pw;
3174
3175                                 if ((pw = getpwnam($1)) == NULL) {
3176                                         yyerror("unknown user %s", $1);
3177                                         free($1);
3178                                         YYERROR;
3179                                 }
3180                                 $$ = pw->pw_uid;
3181                         }
3182                         free($1);
3183                 }
3184                 | NUMBER                        {
3185                         if ($1 < 0 || $1 >= UID_MAX) {
3186                                 yyerror("illegal uid value %lu", $1);
3187                                 YYERROR;
3188                         }
3189                         $$ = $1;
3190                 }
3191                 ;
3192
3193 gids            : gid_item                      { $$ = $1; }
3194                 | '{' optnl gid_list '}'        { $$ = $3; }
3195                 ;
3196
3197 gid_list        : gid_item optnl                { $$ = $1; }
3198                 | gid_list comma gid_item optnl {
3199                         $1->tail->next = $3;
3200                         $1->tail = $3;
3201                         $$ = $1;
3202                 }
3203                 ;
3204
3205 gid_item        : gid                           {
3206                         $$ = calloc(1, sizeof(struct node_gid));
3207                         if ($$ == NULL)
3208                                 err(1, "gid_item: calloc");
3209                         $$->gid[0] = $1;
3210                         $$->gid[1] = $1;
3211                         $$->op = PF_OP_EQ;
3212                         $$->next = NULL;
3213                         $$->tail = $$;
3214                 }
3215                 | unaryop gid                   {
3216                         if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3217                                 yyerror("group unknown requires operator = or "
3218                                     "!=");
3219                                 YYERROR;
3220                         }
3221                         $$ = calloc(1, sizeof(struct node_gid));
3222                         if ($$ == NULL)
3223                                 err(1, "gid_item: calloc");
3224                         $$->gid[0] = $2;
3225                         $$->gid[1] = $2;
3226                         $$->op = $1;
3227                         $$->next = NULL;
3228                         $$->tail = $$;
3229                 }
3230                 | gid PORTBINARY gid            {
3231                         if ($1 == GID_MAX || $3 == GID_MAX) {
3232                                 yyerror("group unknown requires operator = or "
3233                                     "!=");
3234                                 YYERROR;
3235                         }
3236                         $$ = calloc(1, sizeof(struct node_gid));
3237                         if ($$ == NULL)
3238                                 err(1, "gid_item: calloc");
3239                         $$->gid[0] = $1;
3240                         $$->gid[1] = $3;
3241                         $$->op = $2;
3242                         $$->next = NULL;
3243                         $$->tail = $$;
3244                 }
3245                 ;
3246
3247 gid             : STRING                        {
3248                         if (!strcmp($1, "unknown"))
3249                                 $$ = GID_MAX;
3250                         else {
3251                                 struct group    *grp;
3252
3253                                 if ((grp = getgrnam($1)) == NULL) {
3254                                         yyerror("unknown group %s", $1);
3255                                         free($1);
3256                                         YYERROR;
3257                                 }
3258                                 $$ = grp->gr_gid;
3259                         }
3260                         free($1);
3261                 }
3262                 | NUMBER                        {
3263                         if ($1 < 0 || $1 >= GID_MAX) {
3264                                 yyerror("illegal gid value %lu", $1);
3265                                 YYERROR;
3266                         }
3267                         $$ = $1;
3268                 }
3269                 ;
3270
3271 flag            : STRING                        {
3272                         int     f;
3273
3274                         if ((f = parse_flags($1)) < 0) {
3275                                 yyerror("bad flags %s", $1);
3276                                 free($1);
3277                                 YYERROR;
3278                         }
3279                         free($1);
3280                         $$.b1 = f;
3281                 }
3282                 ;
3283
3284 flags           : FLAGS flag '/' flag   { $$.b1 = $2.b1; $$.b2 = $4.b1; }
3285                 | FLAGS '/' flag        { $$.b1 = 0; $$.b2 = $3.b1; }
3286                 | FLAGS ANY             { $$.b1 = 0; $$.b2 = 0; }
3287                 ;
3288
3289 icmpspec        : ICMPTYPE icmp_item                    { $$ = $2; }
3290                 | ICMPTYPE '{' optnl icmp_list '}'      { $$ = $4; }
3291                 | ICMP6TYPE icmp6_item                  { $$ = $2; }
3292                 | ICMP6TYPE '{' optnl icmp6_list '}'    { $$ = $4; }
3293                 ;
3294
3295 icmp_list       : icmp_item optnl               { $$ = $1; }
3296                 | icmp_list comma icmp_item optnl {
3297                         $1->tail->next = $3;
3298                         $1->tail = $3;
3299                         $$ = $1;
3300                 }
3301                 ;
3302
3303 icmp6_list      : icmp6_item optnl              { $$ = $1; }
3304                 | icmp6_list comma icmp6_item optnl {
3305                         $1->tail->next = $3;
3306                         $1->tail = $3;
3307                         $$ = $1;
3308                 }
3309                 ;
3310
3311 icmp_item       : icmptype              {
3312                         $$ = calloc(1, sizeof(struct node_icmp));
3313                         if ($$ == NULL)
3314                                 err(1, "icmp_item: calloc");
3315                         $$->type = $1;
3316                         $$->code = 0;
3317                         $$->proto = IPPROTO_ICMP;
3318                         $$->next = NULL;
3319                         $$->tail = $$;
3320                 }
3321                 | icmptype CODE STRING  {
3322                         const struct icmpcodeent        *p;
3323
3324                         if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3325                                 yyerror("unknown icmp-code %s", $3);
3326                                 free($3);
3327                                 YYERROR;
3328                         }
3329
3330                         free($3);
3331                         $$ = calloc(1, sizeof(struct node_icmp));
3332                         if ($$ == NULL)
3333                                 err(1, "icmp_item: calloc");
3334                         $$->type = $1;
3335                         $$->code = p->code + 1;
3336                         $$->proto = IPPROTO_ICMP;
3337                         $$->next = NULL;
3338                         $$->tail = $$;
3339                 }
3340                 | icmptype CODE NUMBER  {
3341                         if ($3 < 0 || $3 > 255) {
3342                                 yyerror("illegal icmp-code %lu", $3);
3343                                 YYERROR;
3344                         }
3345                         $$ = calloc(1, sizeof(struct node_icmp));
3346                         if ($$ == NULL)
3347                                 err(1, "icmp_item: calloc");
3348                         $$->type = $1;
3349                         $$->code = $3 + 1;
3350                         $$->proto = IPPROTO_ICMP;
3351                         $$->next = NULL;
3352                         $$->tail = $$;
3353                 }
3354                 ;
3355
3356 icmp6_item      : icmp6type             {
3357                         $$ = calloc(1, sizeof(struct node_icmp));
3358                         if ($$ == NULL)
3359                                 err(1, "icmp_item: calloc");
3360                         $$->type = $1;
3361                         $$->code = 0;
3362                         $$->proto = IPPROTO_ICMPV6;
3363                         $$->next = NULL;
3364                         $$->tail = $$;
3365                 }
3366                 | icmp6type CODE STRING {
3367                         const struct icmpcodeent        *p;
3368
3369                         if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3370                                 yyerror("unknown icmp6-code %s", $3);
3371                                 free($3);
3372                                 YYERROR;
3373                         }
3374                         free($3);
3375
3376                         $$ = calloc(1, sizeof(struct node_icmp));
3377                         if ($$ == NULL)
3378                                 err(1, "icmp_item: calloc");
3379                         $$->type = $1;
3380                         $$->code = p->code + 1;
3381                         $$->proto = IPPROTO_ICMPV6;
3382                         $$->next = NULL;
3383                         $$->tail = $$;
3384                 }
3385                 | icmp6type CODE NUMBER {
3386                         if ($3 < 0 || $3 > 255) {
3387                                 yyerror("illegal icmp-code %lu", $3);
3388                                 YYERROR;
3389                         }
3390                         $$ = calloc(1, sizeof(struct node_icmp));
3391                         if ($$ == NULL)
3392                                 err(1, "icmp_item: calloc");
3393                         $$->type = $1;
3394                         $$->code = $3 + 1;
3395                         $$->proto = IPPROTO_ICMPV6;
3396                         $$->next = NULL;
3397                         $$->tail = $$;
3398                 }
3399                 ;
3400
3401 icmptype        : STRING                        {
3402                         const struct icmptypeent        *p;
3403
3404                         if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3405                                 yyerror("unknown icmp-type %s", $1);
3406                                 free($1);
3407                                 YYERROR;
3408                         }
3409                         $$ = p->type + 1;
3410                         free($1);
3411                 }
3412                 | NUMBER                        {
3413                         if ($1 < 0 || $1 > 255) {
3414                                 yyerror("illegal icmp-type %lu", $1);
3415                                 YYERROR;
3416                         }
3417                         $$ = $1 + 1;
3418                 }
3419                 ;
3420
3421 icmp6type       : STRING                        {
3422                         const struct icmptypeent        *p;
3423
3424                         if ((p = geticmptypebyname($1, AF_INET6)) ==
3425                             NULL) {
3426                                 yyerror("unknown icmp6-type %s", $1);
3427                                 free($1);
3428                                 YYERROR;
3429                         }
3430                         $$ = p->type + 1;
3431                         free($1);
3432                 }
3433                 | NUMBER                        {
3434                         if ($1 < 0 || $1 > 255) {
3435                                 yyerror("illegal icmp6-type %lu", $1);
3436                                 YYERROR;
3437                         }
3438                         $$ = $1 + 1;
3439                 }
3440                 ;
3441
3442 tos     : STRING                        {
3443                         if (!strcmp($1, "lowdelay"))
3444                                 $$ = IPTOS_LOWDELAY;
3445                         else if (!strcmp($1, "throughput"))
3446                                 $$ = IPTOS_THROUGHPUT;
3447                         else if (!strcmp($1, "reliability"))
3448                                 $$ = IPTOS_RELIABILITY;
3449                         else if ($1[0] == '0' && $1[1] == 'x')
3450                                 $$ = strtoul($1, NULL, 16);
3451                         else
3452                                 $$ = 0;         /* flag bad argument */
3453                         if (!$$ || $$ > 255) {
3454                                 yyerror("illegal tos value %s", $1);
3455                                 free($1);
3456                                 YYERROR;
3457                         }
3458                         free($1);
3459                 }
3460                 | NUMBER                        {
3461                         $$ = $1;
3462                         if (!$$ || $$ > 255) {
3463                                 yyerror("illegal tos value %s", $1);
3464                                 YYERROR;
3465                         }
3466                 }
3467                 ;
3468
3469 sourcetrack     : SOURCETRACK           { $$ = PF_SRCTRACK; }
3470                 | SOURCETRACK GLOBAL    { $$ = PF_SRCTRACK_GLOBAL; }
3471                 | SOURCETRACK RULE      { $$ = PF_SRCTRACK_RULE; }
3472                 ;
3473
3474 statelock       : IFBOUND {
3475                         $$ = PFRULE_IFBOUND;
3476                 }
3477                 | FLOATING {
3478                         $$ = 0;
3479                 }
3480                 ;
3481
3482 keep            : NO STATE                      {
3483                         $$.action = 0;
3484                         $$.options = NULL;
3485                 }
3486                 | KEEP STATE state_opt_spec     {
3487                         $$.action = PF_STATE_NORMAL;
3488                         $$.options = $3;
3489                 }
3490                 | MODULATE STATE state_opt_spec {
3491                         $$.action = PF_STATE_MODULATE;
3492                         $$.options = $3;
3493                 }
3494                 | SYNPROXY STATE state_opt_spec {
3495                         $$.action = PF_STATE_SYNPROXY;
3496                         $$.options = $3;
3497                 }
3498                 ;
3499
3500 flush           : /* empty */                   { $$ = 0; }
3501                 | FLUSH                         { $$ = PF_FLUSH; }
3502                 | FLUSH GLOBAL                  {
3503                         $$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3504                 }
3505                 ;
3506
3507 state_opt_spec  : '(' state_opt_list ')'        { $$ = $2; }
3508                 | /* empty */                   { $$ = NULL; }
3509                 ;
3510
3511 state_opt_list  : state_opt_item                { $$ = $1; }
3512                 | state_opt_list comma state_opt_item {
3513                         $1->tail->next = $3;
3514                         $1->tail = $3;
3515                         $$ = $1;
3516                 }
3517                 ;
3518
3519 state_opt_item  : MAXIMUM NUMBER                {
3520                         if ($2 < 0 || $2 > UINT_MAX) {
3521                                 yyerror("only positive values permitted");
3522                                 YYERROR;
3523                         }
3524                         $$ = calloc(1, sizeof(struct node_state_opt));
3525                         if ($$ == NULL)
3526                                 err(1, "state_opt_item: calloc");
3527                         $$->type = PF_STATE_OPT_MAX;
3528                         $$->data.max_states = $2;
3529                         $$->next = NULL;
3530                         $$->tail = $$;
3531                 }
3532                 | NOSYNC                                {
3533                         $$ = calloc(1, sizeof(struct node_state_opt));
3534                         if ($$ == NULL)
3535                                 err(1, "state_opt_item: calloc");
3536                         $$->type = PF_STATE_OPT_NOSYNC;
3537                         $$->next = NULL;
3538                         $$->tail = $$;
3539                 }
3540                 | MAXSRCSTATES NUMBER                   {
3541                         if ($2 < 0 || $2 > UINT_MAX) {
3542                                 yyerror("only positive values permitted");
3543                                 YYERROR;
3544                         }
3545                         $$ = calloc(1, sizeof(struct node_state_opt));
3546                         if ($$ == NULL)
3547                                 err(1, "state_opt_item: calloc");
3548                         $$->type = PF_STATE_OPT_MAX_SRC_STATES;
3549                         $$->data.max_src_states = $2;
3550                         $$->next = NULL;
3551                         $$->tail = $$;
3552                 }
3553                 | MAXSRCCONN NUMBER                     {
3554                         if ($2 < 0 || $2 > UINT_MAX) {
3555                                 yyerror("only positive values permitted");
3556                                 YYERROR;
3557                         }
3558                         $$ = calloc(1, sizeof(struct node_state_opt));
3559                         if ($$ == NULL)
3560                                 err(1, "state_opt_item: calloc");
3561                         $$->type = PF_STATE_OPT_MAX_SRC_CONN;
3562                         $$->data.max_src_conn = $2;
3563                         $$->next = NULL;
3564                         $$->tail = $$;
3565                 }
3566                 | MAXSRCCONNRATE NUMBER '/' NUMBER      {
3567                         if ($2 < 0 || $2 > UINT_MAX ||
3568                             $4 < 0 || $4 > UINT_MAX) {
3569                                 yyerror("only positive values permitted");
3570                                 YYERROR;
3571                         }
3572                         $$ = calloc(1, sizeof(struct node_state_opt));
3573                         if ($$ == NULL)
3574                                 err(1, "state_opt_item: calloc");
3575                         $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3576                         $$->data.max_src_conn_rate.limit = $2;
3577                         $$->data.max_src_conn_rate.seconds = $4;
3578                         $$->next = NULL;
3579                         $$->tail = $$;
3580                 }
3581                 | OVERLOAD '<' STRING '>' flush         {
3582                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3583                                 yyerror("table name '%s' too long", $3);
3584                                 free($3);
3585                                 YYERROR;
3586                         }
3587                         $$ = calloc(1, sizeof(struct node_state_opt));
3588                         if ($$ == NULL)
3589                                 err(1, "state_opt_item: calloc");
3590                         if (strlcpy($$->data.overload.tblname, $3,
3591                             PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3592                                 errx(1, "state_opt_item: strlcpy");
3593                         free($3);
3594                         $$->type = PF_STATE_OPT_OVERLOAD;
3595                         $$->data.overload.flush = $5;
3596                         $$->next = NULL;
3597                         $$->tail = $$;
3598                 }
3599                 | MAXSRCNODES NUMBER                    {
3600                         if ($2 < 0 || $2 > UINT_MAX) {
3601                                 yyerror("only positive values permitted");
3602                                 YYERROR;
3603                         }
3604                         $$ = calloc(1, sizeof(struct node_state_opt));
3605                         if ($$ == NULL)
3606                                 err(1, "state_opt_item: calloc");
3607                         $$->type = PF_STATE_OPT_MAX_SRC_NODES;
3608                         $$->data.max_src_nodes = $2;
3609                         $$->next = NULL;
3610                         $$->tail = $$;
3611                 }
3612                 | sourcetrack {
3613                         $$ = calloc(1, sizeof(struct node_state_opt));
3614                         if ($$ == NULL)
3615                                 err(1, "state_opt_item: calloc");
3616                         $$->type = PF_STATE_OPT_SRCTRACK;
3617                         $$->data.src_track = $1;
3618                         $$->next = NULL;
3619                         $$->tail = $$;
3620                 }
3621                 | statelock {
3622                         $$ = calloc(1, sizeof(struct node_state_opt));
3623                         if ($$ == NULL)
3624                                 err(1, "state_opt_item: calloc");
3625                         $$->type = PF_STATE_OPT_STATELOCK;
3626                         $$->data.statelock = $1;
3627                         $$->next = NULL;
3628                         $$->tail = $$;
3629                 }
3630                 | SLOPPY {
3631                         $$ = calloc(1, sizeof(struct node_state_opt));
3632                         if ($$ == NULL)
3633                                 err(1, "state_opt_item: calloc");
3634                         $$->type = PF_STATE_OPT_SLOPPY;
3635                         $$->next = NULL;
3636                         $$->tail = $$;
3637                 }
3638                 | STRING NUMBER                 {
3639                         int     i;
3640
3641                         if ($2 < 0 || $2 > UINT_MAX) {
3642                                 yyerror("only positive values permitted");
3643                                 YYERROR;
3644                         }
3645                         for (i = 0; pf_timeouts[i].name &&
3646                             strcmp(pf_timeouts[i].name, $1); ++i)
3647                                 ;       /* nothing */
3648                         if (!pf_timeouts[i].name) {
3649                                 yyerror("illegal timeout name %s", $1);
3650                                 free($1);
3651                                 YYERROR;
3652                         }
3653                         if (strchr(pf_timeouts[i].name, '.') == NULL) {
3654                                 yyerror("illegal state timeout %s", $1);
3655                                 free($1);
3656                                 YYERROR;
3657                         }
3658                         free($1);
3659                         $$ = calloc(1, sizeof(struct node_state_opt));
3660                         if ($$ == NULL)
3661                                 err(1, "state_opt_item: calloc");
3662                         $$->type = PF_STATE_OPT_TIMEOUT;
3663                         $$->data.timeout.number = pf_timeouts[i].timeout;
3664                         $$->data.timeout.seconds = $2;
3665                         $$->next = NULL;
3666                         $$->tail = $$;
3667                 }
3668                 ;
3669
3670 label           : LABEL STRING                  {
3671                         $$ = $2;
3672                 }
3673                 ;
3674
3675 qname           : QUEUE STRING                          {
3676                         $$.qname = $2;
3677                         $$.pqname = NULL;
3678                 }
3679                 | QUEUE '(' STRING ')'                  {
3680                         $$.qname = $3;
3681                         $$.pqname = NULL;
3682                 }
3683                 | QUEUE '(' STRING comma STRING ')'     {
3684                         $$.qname = $3;
3685                         $$.pqname = $5;
3686                 }
3687                 ;
3688
3689 no              : /* empty */                   { $$ = 0; }
3690                 | NO                            { $$ = 1; }
3691                 ;
3692
3693 portstar        : numberstring                  {
3694                         if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3695                                 free($1);
3696                                 YYERROR;
3697                         }
3698                         free($1);
3699                 }
3700                 ;
3701
3702 redirspec       : host                          { $$ = $1; }
3703                 | '{' optnl redir_host_list '}' { $$ = $3; }
3704                 ;
3705
3706 redir_host_list : host optnl                    { $$ = $1; }
3707                 | redir_host_list comma host optnl {
3708                         $1->tail->next = $3;
3709                         $1->tail = $3->tail;
3710                         $$ = $1;
3711                 }
3712                 ;
3713
3714 redirpool       : /* empty */                   { $$ = NULL; }
3715                 | ARROW redirspec               {
3716                         $$ = calloc(1, sizeof(struct redirection));
3717                         if ($$ == NULL)
3718                                 err(1, "redirection: calloc");
3719                         $$->host = $2;
3720                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3721                 }
3722                 | ARROW redirspec PORT portstar {
3723                         $$ = calloc(1, sizeof(struct redirection));
3724                         if ($$ == NULL)
3725                                 err(1, "redirection: calloc");
3726                         $$->host = $2;
3727                         $$->rport = $4;
3728                 }
3729                 ;
3730
3731 hashkey         : /* empty */
3732                 {
3733                         $$ = calloc(1, sizeof(struct pf_poolhashkey));
3734                         if ($$ == NULL)
3735                                 err(1, "hashkey: calloc");
3736                         $$->key32[0] = arc4random();
3737                         $$->key32[1] = arc4random();
3738                         $$->key32[2] = arc4random();
3739                         $$->key32[3] = arc4random();
3740                 }
3741                 | string
3742                 {
3743                         if (!strncmp($1, "0x", 2)) {
3744                                 if (strlen($1) != 34) {
3745                                         free($1);
3746                                         yyerror("hex key must be 128 bits "
3747                                                 "(32 hex digits) long");
3748                                         YYERROR;
3749                                 }
3750                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3751                                 if ($$ == NULL)
3752                                         err(1, "hashkey: calloc");
3753
3754                                 if (sscanf($1, "0x%8x%8x%8x%8x",
3755                                     &$$->key32[0], &$$->key32[1],
3756                                     &$$->key32[2], &$$->key32[3]) != 4) {
3757                                         free($$);
3758                                         free($1);
3759                                         yyerror("invalid hex key");
3760                                         YYERROR;
3761                                 }
3762                         } else {
3763                                 MD5_CTX context;
3764
3765                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3766                                 if ($$ == NULL)
3767                                         err(1, "hashkey: calloc");
3768                                 MD5Init(&context);
3769                                 MD5Update(&context, (unsigned char *)$1,
3770                                     strlen($1));
3771                                 MD5Final((unsigned char *)$$, &context);
3772                                 HTONL($$->key32[0]);
3773                                 HTONL($$->key32[1]);
3774                                 HTONL($$->key32[2]);
3775                                 HTONL($$->key32[3]);
3776                         }
3777                         free($1);
3778                 }
3779                 ;
3780
3781 pool_opts       :       { bzero(&pool_opts, sizeof pool_opts); }
3782                     pool_opts_l
3783                         { $$ = pool_opts; }
3784                 | /* empty */   {
3785                         bzero(&pool_opts, sizeof pool_opts);
3786                         $$ = pool_opts;
3787                 }
3788                 ;
3789
3790 pool_opts_l     : pool_opts_l pool_opt
3791                 | pool_opt
3792                 ;
3793
3794 pool_opt        : BITMASK       {
3795                         if (pool_opts.type) {
3796                                 yyerror("pool type cannot be redefined");
3797                                 YYERROR;
3798                         }
3799                         pool_opts.type =  PF_POOL_BITMASK;
3800                 }
3801                 | RANDOM        {
3802                         if (pool_opts.type) {
3803                                 yyerror("pool type cannot be redefined");
3804                                 YYERROR;
3805                         }
3806                         pool_opts.type = PF_POOL_RANDOM;
3807                 }
3808                 | SOURCEHASH hashkey {
3809                         if (pool_opts.type) {
3810                                 yyerror("pool type cannot be redefined");
3811                                 YYERROR;
3812                         }
3813                         pool_opts.type = PF_POOL_SRCHASH;
3814                         pool_opts.key = $2;
3815                 }
3816                 | ROUNDROBIN    {
3817                         if (pool_opts.type) {
3818                                 yyerror("pool type cannot be redefined");
3819                                 YYERROR;
3820                         }
3821                         pool_opts.type = PF_POOL_ROUNDROBIN;
3822                 }
3823                 | STATICPORT    {
3824                         if (pool_opts.staticport) {
3825                                 yyerror("static-port cannot be redefined");
3826                                 YYERROR;
3827                         }
3828                         pool_opts.staticport = 1;
3829                 }
3830                 | STICKYADDRESS {
3831                         if (filter_opts.marker & POM_STICKYADDRESS) {
3832                                 yyerror("sticky-address cannot be redefined");
3833                                 YYERROR;
3834                         }
3835                         pool_opts.marker |= POM_STICKYADDRESS;
3836                         pool_opts.opts |= PF_POOL_STICKYADDR;
3837                 }
3838                 ;
3839
3840 redirection     : /* empty */                   { $$ = NULL; }
3841                 | ARROW host                    {
3842                         $$ = calloc(1, sizeof(struct redirection));
3843                         if ($$ == NULL)
3844                                 err(1, "redirection: calloc");
3845                         $$->host = $2;
3846                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3847                 }
3848                 | ARROW host PORT portstar      {
3849                         $$ = calloc(1, sizeof(struct redirection));
3850                         if ($$ == NULL)
3851                                 err(1, "redirection: calloc");
3852                         $$->host = $2;
3853                         $$->rport = $4;
3854                 }
3855                 ;
3856
3857 natpasslog      : /* empty */   { $$.b1 = $$.b2 = 0; $$.w2 = 0; }
3858                 | PASS          { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
3859                 | PASS log      { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
3860                 | log           { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
3861                 ;
3862
3863 nataction       : no NAT natpasslog {
3864                         if ($1 && $3.b1) {
3865                                 yyerror("\"pass\" not valid with \"no\"");
3866                                 YYERROR;
3867                         }
3868                         if ($1)
3869                                 $$.b1 = PF_NONAT;
3870                         else
3871                                 $$.b1 = PF_NAT;
3872                         $$.b2 = $3.b1;
3873                         $$.w = $3.b2;
3874                         $$.w2 = $3.w2;
3875                 }
3876                 | no RDR natpasslog {
3877                         if ($1 && $3.b1) {
3878                                 yyerror("\"pass\" not valid with \"no\"");
3879                                 YYERROR;
3880                         }
3881                         if ($1)
3882                                 $$.b1 = PF_NORDR;
3883                         else
3884                                 $$.b1 = PF_RDR;
3885                         $$.b2 = $3.b1;
3886                         $$.w = $3.b2;
3887                         $$.w2 = $3.w2;
3888                 }
3889                 ;
3890
3891 natrule         : nataction interface af proto fromto tag tagged rtable
3892                     redirpool pool_opts
3893                 {
3894                         struct pf_rule  r;
3895
3896                         if (check_rulestate(PFCTL_STATE_NAT))
3897                                 YYERROR;
3898
3899                         memset(&r, 0, sizeof(r));
3900
3901                         r.action = $1.b1;
3902                         r.natpass = $1.b2;
3903                         r.log = $1.w;
3904                         r.logif = $1.w2;
3905                         r.af = $3;
3906
3907                         if (!r.af) {
3908                                 if ($5.src.host && $5.src.host->af &&
3909                                     !$5.src.host->ifindex)
3910                                         r.af = $5.src.host->af;
3911                                 else if ($5.dst.host && $5.dst.host->af &&
3912                                     !$5.dst.host->ifindex)
3913                                         r.af = $5.dst.host->af;
3914                         }
3915
3916                         if ($6 != NULL)
3917                                 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
3918                                     PF_TAG_NAME_SIZE) {
3919                                         yyerror("tag too long, max %u chars",
3920                                             PF_TAG_NAME_SIZE - 1);
3921                                         YYERROR;
3922                                 }
3923
3924                         if ($7.name)
3925                                 if (strlcpy(r.match_tagname, $7.name,
3926                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
3927                                         yyerror("tag too long, max %u chars",
3928                                             PF_TAG_NAME_SIZE - 1);
3929                                         YYERROR;
3930                                 }
3931                         r.match_tag_not = $7.neg;
3932                         r.rtableid = $8;
3933
3934                         if (r.action == PF_NONAT || r.action == PF_NORDR) {
3935                                 if ($9 != NULL) {
3936                                         yyerror("translation rule with 'no' "
3937                                             "does not need '->'");
3938                                         YYERROR;
3939                                 }
3940                         } else {
3941                                 if ($9 == NULL || $9->host == NULL) {
3942                                         yyerror("translation rule requires '-> "
3943                                             "address'");
3944                                         YYERROR;
3945                                 }
3946                                 if (!r.af && ! $9->host->ifindex)
3947                                         r.af = $9->host->af;
3948
3949                                 remove_invalid_hosts(&$9->host, &r.af);
3950                                 if (invalid_redirect($9->host, r.af))
3951                                         YYERROR;
3952                                 if (check_netmask($9->host, r.af))
3953                                         YYERROR;
3954
3955                                 r.rpool.proxy_port[0] = ntohs($9->rport.a);
3956
3957                                 switch (r.action) {
3958                                 case PF_RDR:
3959                                         if (!$9->rport.b && $9->rport.t &&
3960                                             $5.dst.port != NULL) {
3961                                                 r.rpool.proxy_port[1] =
3962                                                     ntohs($9->rport.a) +
3963                                                     (ntohs(
3964                                                     $5.dst.port->port[1]) -
3965                                                     ntohs(
3966                                                     $5.dst.port->port[0]));
3967                                         } else
3968                                                 r.rpool.proxy_port[1] =
3969                                                     ntohs($9->rport.b);
3970                                         break;
3971                                 case PF_NAT:
3972                                         r.rpool.proxy_port[1] =
3973                                             ntohs($9->rport.b);
3974                                         if (!r.rpool.proxy_port[0] &&
3975                                             !r.rpool.proxy_port[1]) {
3976                                                 r.rpool.proxy_port[0] =
3977                                                     PF_NAT_PROXY_PORT_LOW;
3978                                                 r.rpool.proxy_port[1] =
3979                                                     PF_NAT_PROXY_PORT_HIGH;
3980                                         } else if (!r.rpool.proxy_port[1])
3981                                                 r.rpool.proxy_port[1] =
3982                                                     r.rpool.proxy_port[0];
3983                                         break;
3984                                 default:
3985                                         break;
3986                                 }
3987
3988                                 r.rpool.opts = $10.type;
3989                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
3990                                     PF_POOL_NONE && ($9->host->next != NULL ||
3991                                     $9->host->addr.type == PF_ADDR_TABLE ||
3992                                     DYNIF_MULTIADDR($9->host->addr)))
3993                                         r.rpool.opts = PF_POOL_ROUNDROBIN;
3994                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
3995                                     PF_POOL_ROUNDROBIN &&
3996                                     disallow_table($9->host, "tables are only "
3997                                     "supported in round-robin redirection "
3998                                     "pools"))
3999                                         YYERROR;
4000                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4001                                     PF_POOL_ROUNDROBIN &&
4002                                     disallow_alias($9->host, "interface (%s) "
4003                                     "is only supported in round-robin "
4004                                     "redirection pools"))
4005                                         YYERROR;
4006                                 if ($9->host->next != NULL) {
4007                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4008                                             PF_POOL_ROUNDROBIN) {
4009                                                 yyerror("only round-robin "
4010                                                     "valid for multiple "
4011                                                     "redirection addresses");
4012                                                 YYERROR;
4013                                         }
4014                                 }
4015                         }
4016
4017                         if ($10.key != NULL)
4018                                 memcpy(&r.rpool.key, $10.key,
4019                                     sizeof(struct pf_poolhashkey));
4020
4021                          if ($10.opts)
4022                                 r.rpool.opts |= $10.opts;
4023
4024                         if ($10.staticport) {
4025                                 if (r.action != PF_NAT) {
4026                                         yyerror("the 'static-port' option is "
4027                                             "only valid with nat rules");
4028                                         YYERROR;
4029                                 }
4030                                 if (r.rpool.proxy_port[0] !=
4031                                     PF_NAT_PROXY_PORT_LOW &&
4032                                     r.rpool.proxy_port[1] !=
4033                                     PF_NAT_PROXY_PORT_HIGH) {
4034                                         yyerror("the 'static-port' option can't"
4035                                             " be used when specifying a port"
4036                                             " range");
4037                                         YYERROR;
4038                                 }
4039                                 r.rpool.proxy_port[0] = 0;
4040                                 r.rpool.proxy_port[1] = 0;
4041                         }
4042
4043                         expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
4044                             $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
4045                             $5.dst.port, 0, 0, 0, "");
4046                         free($9);
4047                 }
4048                 ;
4049
4050 binatrule       : no BINAT natpasslog interface af proto FROM host toipspec tag
4051                     tagged rtable redirection
4052                 {
4053                         struct pf_rule          binat;
4054                         struct pf_pooladdr      *pa;
4055
4056                         if (check_rulestate(PFCTL_STATE_NAT))
4057                                 YYERROR;
4058                         if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
4059                             "permitted as a binat destination"))
4060                                 YYERROR;
4061
4062                         memset(&binat, 0, sizeof(binat));
4063
4064                         if ($1 && $3.b1) {
4065                                 yyerror("\"pass\" not valid with \"no\"");
4066                                 YYERROR;
4067                         }
4068                         if ($1)
4069                                 binat.action = PF_NOBINAT;
4070                         else
4071                                 binat.action = PF_BINAT;
4072                         binat.natpass = $3.b1;
4073                         binat.log = $3.b2;
4074                         binat.logif = $3.w2;
4075                         binat.af = $5;
4076                         if (!binat.af && $8 != NULL && $8->af)
4077                                 binat.af = $8->af;
4078                         if (!binat.af && $9 != NULL && $9->af)
4079                                 binat.af = $9->af;
4080
4081                         if (!binat.af && $13 != NULL && $13->host)
4082                                 binat.af = $13->host->af;
4083                         if (!binat.af) {
4084                                 yyerror("address family (inet/inet6) "
4085                                     "undefined");
4086                                 YYERROR;
4087                         }
4088
4089                         if ($4 != NULL) {
4090                                 memcpy(binat.ifname, $4->ifname,
4091                                     sizeof(binat.ifname));
4092                                 binat.ifnot = $4->not;
4093                                 free($4);
4094                         }
4095
4096                         if ($10 != NULL)
4097                                 if (strlcpy(binat.tagname, $10,
4098                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4099                                         yyerror("tag too long, max %u chars",
4100                                             PF_TAG_NAME_SIZE - 1);
4101                                         YYERROR;
4102                                 }
4103                         if ($11.name)
4104                                 if (strlcpy(binat.match_tagname, $11.name,
4105                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4106                                         yyerror("tag too long, max %u chars",
4107                                             PF_TAG_NAME_SIZE - 1);
4108                                         YYERROR;
4109                                 }
4110                         binat.match_tag_not = $11.neg;
4111                         binat.rtableid = $12;
4112
4113                         if ($6 != NULL) {
4114                                 binat.proto = $6->proto;
4115                                 free($6);
4116                         }
4117
4118                         if ($8 != NULL && disallow_table($8, "invalid use of "
4119                             "table <%s> as the source address of a binat rule"))
4120                                 YYERROR;
4121                         if ($8 != NULL && disallow_alias($8, "invalid use of "
4122                             "interface (%s) as the source address of a binat "
4123                             "rule"))
4124                                 YYERROR;
4125                         if ($13 != NULL && $13->host != NULL && disallow_table(
4126                             $13->host, "invalid use of table <%s> as the "
4127                             "redirect address of a binat rule"))
4128                                 YYERROR;
4129                         if ($13 != NULL && $13->host != NULL && disallow_alias(
4130                             $13->host, "invalid use of interface (%s) as the "
4131                             "redirect address of a binat rule"))
4132                                 YYERROR;
4133
4134                         if ($8 != NULL) {
4135                                 if ($8->next) {
4136                                         yyerror("multiple binat ip addresses");
4137                                         YYERROR;
4138                                 }
4139                                 if ($8->addr.type == PF_ADDR_DYNIFTL)
4140                                         $8->af = binat.af;
4141                                 if ($8->af != binat.af) {
4142                                         yyerror("binat ip versions must match");
4143                                         YYERROR;
4144                                 }
4145                                 if (check_netmask($8, binat.af))
4146                                         YYERROR;
4147                                 memcpy(&binat.src.addr, &$8->addr,
4148                                     sizeof(binat.src.addr));
4149                                 free($8);
4150                         }
4151                         if ($9 != NULL) {
4152                                 if ($9->next) {
4153                                         yyerror("multiple binat ip addresses");
4154                                         YYERROR;
4155                                 }
4156                                 if ($9->af != binat.af && $9->af) {
4157                                         yyerror("binat ip versions must match");
4158                                         YYERROR;
4159                                 }
4160                                 if (check_netmask($9, binat.af))
4161                                         YYERROR;
4162                                 memcpy(&binat.dst.addr, &$9->addr,
4163                                     sizeof(binat.dst.addr));
4164                                 binat.dst.neg = $9->not;
4165                                 free($9);
4166                         }
4167
4168                         if (binat.action == PF_NOBINAT) {
4169                                 if ($13 != NULL) {
4170                                         yyerror("'no binat' rule does not need"
4171                                             " '->'");
4172                                         YYERROR;
4173                                 }
4174                         } else {
4175                                 if ($13 == NULL || $13->host == NULL) {
4176                                         yyerror("'binat' rule requires"
4177                                             " '-> address'");
4178                                         YYERROR;
4179                                 }
4180
4181                                 remove_invalid_hosts(&$13->host, &binat.af);
4182                                 if (invalid_redirect($13->host, binat.af))
4183                                         YYERROR;
4184                                 if ($13->host->next != NULL) {
4185                                         yyerror("binat rule must redirect to "
4186                                             "a single address");
4187                                         YYERROR;
4188                                 }
4189                                 if (check_netmask($13->host, binat.af))
4190                                         YYERROR;
4191
4192                                 if (!PF_AZERO(&binat.src.addr.v.a.mask,
4193                                     binat.af) &&
4194                                     !PF_AEQ(&binat.src.addr.v.a.mask,
4195                                     &$13->host->addr.v.a.mask, binat.af)) {
4196                                         yyerror("'binat' source mask and "
4197                                             "redirect mask must be the same");
4198                                         YYERROR;
4199                                 }
4200
4201                                 TAILQ_INIT(&binat.rpool.list);
4202                                 pa = calloc(1, sizeof(struct pf_pooladdr));
4203                                 if (pa == NULL)
4204                                         err(1, "binat: calloc");
4205                                 pa->addr = $13->host->addr;
4206                                 pa->ifname[0] = 0;
4207                                 TAILQ_INSERT_TAIL(&binat.rpool.list,
4208                                     pa, entries);
4209
4210                                 free($13);
4211                         }
4212
4213                         pfctl_add_rule(pf, &binat, "");
4214                 }
4215                 ;
4216
4217 tag             : /* empty */           { $$ = NULL; }
4218                 | TAG STRING            { $$ = $2; }
4219                 ;
4220
4221 tagged          : /* empty */           { $$.neg = 0; $$.name = NULL; }
4222                 | not TAGGED string     { $$.neg = $1; $$.name = $3; }
4223                 ;
4224
4225 rtable          : /* empty */           { $$ = -1; }
4226                 | RTABLE NUMBER         {
4227                         if ($2 < 0 || $2 > rt_tableid_max()) {
4228                                 yyerror("invalid rtable id");
4229                                 YYERROR;
4230                         }
4231                         $$ = $2;
4232                 }
4233                 ;
4234
4235 route_host      : STRING                        {
4236                         $$ = calloc(1, sizeof(struct node_host));
4237                         if ($$ == NULL)
4238                                 err(1, "route_host: calloc");
4239                         $$->ifname = $1;
4240                         set_ipmask($$, 128);
4241                         $$->next = NULL;
4242                         $$->tail = $$;
4243                 }
4244                 | '(' STRING host ')'           {
4245                         $$ = $3;
4246                         $$->ifname = $2;
4247                 }
4248                 ;
4249
4250 route_host_list : route_host optnl                      { $$ = $1; }
4251                 | route_host_list comma route_host optnl {
4252                         if ($1->af == 0)
4253                                 $1->af = $3->af;
4254                         if ($1->af != $3->af) {
4255                                 yyerror("all pool addresses must be in the "
4256                                     "same address family");
4257                                 YYERROR;
4258                         }
4259                         $1->tail->next = $3;
4260                         $1->tail = $3->tail;
4261                         $$ = $1;
4262                 }
4263                 ;
4264
4265 routespec       : route_host                    { $$ = $1; }
4266                 | '{' optnl route_host_list '}' { $$ = $3; }
4267                 ;
4268
4269 route           : /* empty */                   {
4270                         $$.host = NULL;
4271                         $$.rt = 0;
4272                         $$.pool_opts = 0;
4273                 }
4274                 | FASTROUTE {
4275                         $$.host = NULL;
4276                         $$.rt = PF_FASTROUTE;
4277                         $$.pool_opts = 0;
4278                 }
4279                 | ROUTETO routespec pool_opts {
4280                         $$.host = $2;
4281                         $$.rt = PF_ROUTETO;
4282                         $$.pool_opts = $3.type | $3.opts;
4283                         if ($3.key != NULL)
4284                                 $$.key = $3.key;
4285                 }
4286                 | REPLYTO routespec pool_opts {
4287                         $$.host = $2;
4288                         $$.rt = PF_REPLYTO;
4289                         $$.pool_opts = $3.type | $3.opts;
4290                         if ($3.key != NULL)
4291                                 $$.key = $3.key;
4292                 }
4293                 | DUPTO routespec pool_opts {
4294                         $$.host = $2;
4295                         $$.rt = PF_DUPTO;
4296                         $$.pool_opts = $3.type | $3.opts;
4297                         if ($3.key != NULL)
4298                                 $$.key = $3.key;
4299                 }
4300                 ;
4301
4302 timeout_spec    : STRING NUMBER
4303                 {
4304                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4305                                 free($1);
4306                                 YYERROR;
4307                         }
4308                         if ($2 < 0 || $2 > UINT_MAX) {
4309                                 yyerror("only positive values permitted");
4310                                 YYERROR;
4311                         }
4312                         if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
4313                                 yyerror("unknown timeout %s", $1);
4314                                 free($1);
4315                                 YYERROR;
4316                         }
4317                         free($1);
4318                 }
4319                 ;
4320
4321 timeout_list    : timeout_list comma timeout_spec optnl
4322                 | timeout_spec optnl
4323                 ;
4324
4325 limit_spec      : STRING NUMBER
4326                 {
4327                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4328                                 free($1);
4329                                 YYERROR;
4330                         }
4331                         if ($2 < 0 || $2 > UINT_MAX) {
4332                                 yyerror("only positive values permitted");
4333                                 YYERROR;
4334                         }
4335                         if (pfctl_set_limit(pf, $1, $2) != 0) {
4336                                 yyerror("unable to set limit %s %u", $1, $2);
4337                                 free($1);
4338                                 YYERROR;
4339                         }
4340                         free($1);
4341                 }
4342                 ;
4343
4344 limit_list      : limit_list comma limit_spec optnl
4345                 | limit_spec optnl
4346                 ;
4347
4348 comma           : ','
4349                 | /* empty */
4350                 ;
4351
4352 yesno           : NO                    { $$ = 0; }
4353                 | STRING                {
4354                         if (!strcmp($1, "yes"))
4355                                 $$ = 1;
4356                         else {
4357                                 yyerror("invalid value '%s', expected 'yes' "
4358                                     "or 'no'", $1);
4359                                 free($1);
4360                                 YYERROR;
4361                         }
4362                         free($1);
4363                 }
4364                 ;
4365
4366 unaryop         : '='           { $$ = PF_OP_EQ; }
4367                 | '!' '='       { $$ = PF_OP_NE; }
4368                 | '<' '='       { $$ = PF_OP_LE; }
4369                 | '<'           { $$ = PF_OP_LT; }
4370                 | '>' '='       { $$ = PF_OP_GE; }
4371                 | '>'           { $$ = PF_OP_GT; }
4372                 ;
4373
4374 %%
4375
4376 int
4377 yyerror(const char *fmt, ...)
4378 {
4379         va_list          ap;
4380
4381         file->errors++;
4382         va_start(ap, fmt);
4383         fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4384         vfprintf(stderr, fmt, ap);
4385         fprintf(stderr, "\n");
4386         va_end(ap);
4387         return (0);
4388 }
4389
4390 int
4391 disallow_table(struct node_host *h, const char *fmt)
4392 {
4393         for (; h != NULL; h = h->next)
4394                 if (h->addr.type == PF_ADDR_TABLE) {
4395                         yyerror(fmt, h->addr.v.tblname);
4396                         return (1);
4397                 }
4398         return (0);
4399 }
4400
4401 int
4402 disallow_urpf_failed(struct node_host *h, const char *fmt)
4403 {
4404         for (; h != NULL; h = h->next)
4405                 if (h->addr.type == PF_ADDR_URPFFAILED) {
4406                         yyerror(fmt);
4407                         return (1);
4408                 }
4409         return (0);
4410 }
4411
4412 int
4413 disallow_alias(struct node_host *h, const char *fmt)
4414 {
4415         for (; h != NULL; h = h->next)
4416                 if (DYNIF_MULTIADDR(h->addr)) {
4417                         yyerror(fmt, h->addr.v.tblname);
4418                         return (1);
4419                 }
4420         return (0);
4421 }
4422
4423 int
4424 rule_consistent(struct pf_rule *r, int anchor_call)
4425 {
4426         int     problems = 0;
4427
4428         switch (r->action) {
4429         case PF_PASS:
4430         case PF_DROP:
4431         case PF_SCRUB:
4432         case PF_NOSCRUB:
4433                 problems = filter_consistent(r, anchor_call);
4434                 break;
4435         case PF_NAT:
4436         case PF_NONAT:
4437                 problems = nat_consistent(r);
4438                 break;
4439         case PF_RDR:
4440         case PF_NORDR:
4441                 problems = rdr_consistent(r);
4442                 break;
4443         case PF_BINAT:
4444         case PF_NOBINAT:
4445         default:
4446                 break;
4447         }
4448         return (problems);
4449 }
4450
4451 int
4452 filter_consistent(struct pf_rule *r, int anchor_call)
4453 {
4454         int     problems = 0;
4455
4456         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4457             (r->src.port_op || r->dst.port_op)) {
4458                 yyerror("port only applies to tcp/udp");
4459                 problems++;
4460         }
4461         if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4462             (r->type || r->code)) {
4463                 yyerror("icmp-type/code only applies to icmp");
4464                 problems++;
4465         }
4466         if (!r->af && (r->type || r->code)) {
4467                 yyerror("must indicate address family with icmp-type/code");
4468                 problems++;
4469         }
4470         if (r->overload_tblname[0] &&
4471             r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4472                 yyerror("'overload' requires 'max-src-conn' "
4473                     "or 'max-src-conn-rate'");
4474                 problems++;
4475         }
4476         if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4477             (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4478                 yyerror("proto %s doesn't match address family %s",
4479                     r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4480                     r->af == AF_INET ? "inet" : "inet6");
4481                 problems++;
4482         }
4483         if (r->allow_opts && r->action != PF_PASS) {
4484                 yyerror("allow-opts can only be specified for pass rules");
4485                 problems++;
4486         }
4487         if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4488             r->dst.port_op || r->flagset || r->type || r->code)) {
4489                 yyerror("fragments can be filtered only on IP header fields");
4490                 problems++;
4491         }
4492         if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4493                 yyerror("return-rst can only be applied to TCP rules");
4494                 problems++;
4495         }
4496         if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4497                 yyerror("max-src-nodes requires 'source-track rule'");
4498                 problems++;
4499         }
4500         if (r->action == PF_DROP && r->keep_state) {
4501                 yyerror("keep state on block rules doesn't make sense");
4502                 problems++;
4503         }
4504         if (r->rule_flag & PFRULE_STATESLOPPY &&
4505             (r->keep_state == PF_STATE_MODULATE ||
4506             r->keep_state == PF_STATE_SYNPROXY)) {
4507                 yyerror("sloppy state matching cannot be used with "
4508                     "synproxy state or modulate state");
4509                 problems++;
4510         }
4511         return (-problems);
4512 }
4513
4514 int
4515 nat_consistent(struct pf_rule *r)
4516 {
4517         return (0);     /* yeah! */
4518 }
4519
4520 int
4521 rdr_consistent(struct pf_rule *r)
4522 {
4523         int                      problems = 0;
4524
4525         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
4526                 if (r->src.port_op) {
4527                         yyerror("src port only applies to tcp/udp");
4528                         problems++;
4529                 }
4530                 if (r->dst.port_op) {
4531                         yyerror("dst port only applies to tcp/udp");
4532                         problems++;
4533                 }
4534                 if (r->rpool.proxy_port[0]) {
4535                         yyerror("rpool port only applies to tcp/udp");
4536                         problems++;
4537                 }
4538         }
4539         if (r->dst.port_op &&
4540             r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
4541                 yyerror("invalid port operator for rdr destination port");
4542                 problems++;
4543         }
4544         return (-problems);
4545 }
4546
4547 int
4548 process_tabledef(char *name, struct table_opts *opts)
4549 {
4550         struct pfr_buffer        ab;
4551         struct node_tinit       *ti;
4552
4553         bzero(&ab, sizeof(ab));
4554         ab.pfrb_type = PFRB_ADDRS;
4555         SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4556                 if (ti->file)
4557                         if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
4558                                 if (errno)
4559                                         yyerror("cannot load \"%s\": %s",
4560                                             ti->file, strerror(errno));
4561                                 else
4562                                         yyerror("file \"%s\" contains bad data",
4563                                             ti->file);
4564                                 goto _error;
4565                         }
4566                 if (ti->host)
4567                         if (append_addr_host(&ab, ti->host, 0, 0)) {
4568                                 yyerror("cannot create address buffer: %s",
4569                                     strerror(errno));
4570                                 goto _error;
4571                         }
4572         }
4573         if (pf->opts & PF_OPT_VERBOSE)
4574                 print_tabledef(name, opts->flags, opts->init_addr,
4575                     &opts->init_nodes);
4576         if (!(pf->opts & PF_OPT_NOACTION) &&
4577             pfctl_define_table(name, opts->flags, opts->init_addr,
4578             pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4579                 yyerror("cannot define table %s: %s", name,
4580                     pfr_strerror(errno));
4581                 goto _error;
4582         }
4583         pf->tdirty = 1;
4584         pfr_buf_clear(&ab);
4585         return (0);
4586 _error:
4587         pfr_buf_clear(&ab);
4588         return (-1);
4589 }
4590
4591 struct keywords {
4592         const char      *k_name;
4593         int              k_val;
4594 };
4595
4596 /* macro gore, but you should've seen the prior indentation nightmare... */
4597
4598 #define FREE_LIST(T,r) \
4599         do { \
4600                 T *p, *node = r; \
4601                 while (node != NULL) { \
4602                         p = node; \
4603                         node = node->next; \
4604                         free(p); \
4605                 } \
4606         } while (0)
4607
4608 #define LOOP_THROUGH(T,n,r,C) \
4609         do { \
4610                 T *n; \
4611                 if (r == NULL) { \
4612                         r = calloc(1, sizeof(T)); \
4613                         if (r == NULL) \
4614                                 err(1, "LOOP: calloc"); \
4615                         r->next = NULL; \
4616                 } \
4617                 n = r; \
4618                 while (n != NULL) { \
4619                         do { \
4620                                 C; \
4621                         } while (0); \
4622                         n = n->next; \
4623                 } \
4624         } while (0)
4625
4626 void
4627 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4628 {
4629         char *tmp;
4630         char *p, *q;
4631
4632         if ((tmp = calloc(1, len)) == NULL)
4633                 err(1, "expand_label_str: calloc");
4634         p = q = label;
4635         while ((q = strstr(p, srch)) != NULL) {
4636                 *q = '\0';
4637                 if ((strlcat(tmp, p, len) >= len) ||
4638                     (strlcat(tmp, repl, len) >= len))
4639                         errx(1, "expand_label: label too long");
4640                 q += strlen(srch);
4641                 p = q;
4642         }
4643         if (strlcat(tmp, p, len) >= len)
4644                 errx(1, "expand_label: label too long");
4645         strlcpy(label, tmp, len);       /* always fits */
4646         free(tmp);
4647 }
4648
4649 void
4650 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4651 {
4652         if (strstr(label, name) != NULL) {
4653                 if (!*ifname)
4654                         expand_label_str(label, len, name, "any");
4655                 else
4656                         expand_label_str(label, len, name, ifname);
4657         }
4658 }
4659
4660 void
4661 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
4662     struct node_host *h)
4663 {
4664         char tmp[64], tmp_not[66];
4665
4666         if (strstr(label, name) != NULL) {
4667                 switch (h->addr.type) {
4668                 case PF_ADDR_DYNIFTL:
4669                         snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
4670                         break;
4671                 case PF_ADDR_TABLE:
4672                         snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
4673                         break;
4674                 case PF_ADDR_NOROUTE:
4675                         snprintf(tmp, sizeof(tmp), "no-route");
4676                         break;
4677                 case PF_ADDR_URPFFAILED:
4678                         snprintf(tmp, sizeof(tmp), "urpf-failed");
4679                         break;
4680                 case PF_ADDR_ADDRMASK:
4681                         if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
4682                             PF_AZERO(&h->addr.v.a.mask, af)))
4683                                 snprintf(tmp, sizeof(tmp), "any");
4684                         else {
4685                                 char    a[48];
4686                                 int     bits;
4687
4688                                 if (inet_ntop(af, &h->addr.v.a.addr, a,
4689                                     sizeof(a)) == NULL)
4690                                         snprintf(tmp, sizeof(tmp), "?");
4691                                 else {
4692                                         bits = unmask(&h->addr.v.a.mask, af);
4693                                         if ((af == AF_INET && bits < 32) ||
4694                                             (af == AF_INET6 && bits < 128))
4695                                                 snprintf(tmp, sizeof(tmp),
4696                                                     "%s/%d", a, bits);
4697                                         else
4698                                                 snprintf(tmp, sizeof(tmp),
4699                                                     "%s", a);
4700                                 }
4701                         }
4702                         break;
4703                 default:
4704                         snprintf(tmp, sizeof(tmp), "?");
4705                         break;
4706                 }
4707
4708                 if (h->not) {
4709                         snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
4710                         expand_label_str(label, len, name, tmp_not);
4711                 } else
4712                         expand_label_str(label, len, name, tmp);
4713         }
4714 }
4715
4716 void
4717 expand_label_port(const char *name, char *label, size_t len,
4718     struct node_port *port)
4719 {
4720         char     a1[6], a2[6], op[13] = "";
4721
4722         if (strstr(label, name) != NULL) {
4723                 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
4724                 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
4725                 if (!port->op)
4726                         ;
4727                 else if (port->op == PF_OP_IRG)
4728                         snprintf(op, sizeof(op), "%s><%s", a1, a2);
4729                 else if (port->op == PF_OP_XRG)
4730                         snprintf(op, sizeof(op), "%s<>%s", a1, a2);
4731                 else if (port->op == PF_OP_EQ)
4732                         snprintf(op, sizeof(op), "%s", a1);
4733                 else if (port->op == PF_OP_NE)
4734                         snprintf(op, sizeof(op), "!=%s", a1);
4735                 else if (port->op == PF_OP_LT)
4736                         snprintf(op, sizeof(op), "<%s", a1);
4737                 else if (port->op == PF_OP_LE)
4738                         snprintf(op, sizeof(op), "<=%s", a1);
4739                 else if (port->op == PF_OP_GT)
4740                         snprintf(op, sizeof(op), ">%s", a1);
4741                 else if (port->op == PF_OP_GE)
4742                         snprintf(op, sizeof(op), ">=%s", a1);
4743                 expand_label_str(label, len, name, op);
4744         }
4745 }
4746
4747 void
4748 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
4749 {
4750         struct protoent *pe;
4751         char n[4];
4752
4753         if (strstr(label, name) != NULL) {
4754                 pe = getprotobynumber(proto);
4755                 if (pe != NULL)
4756                         expand_label_str(label, len, name, pe->p_name);
4757                 else {
4758                         snprintf(n, sizeof(n), "%u", proto);
4759                         expand_label_str(label, len, name, n);
4760                 }
4761         }
4762 }
4763
4764 void
4765 expand_label_nr(const char *name, char *label, size_t len)
4766 {
4767         char n[11];
4768
4769         if (strstr(label, name) != NULL) {
4770                 snprintf(n, sizeof(n), "%u", pf->anchor->match);
4771                 expand_label_str(label, len, name, n);
4772         }
4773 }
4774
4775 void
4776 expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
4777     struct node_host *src_host, struct node_port *src_port,
4778     struct node_host *dst_host, struct node_port *dst_port,
4779     u_int8_t proto)
4780 {
4781         expand_label_if("$if", label, len, ifname);
4782         expand_label_addr("$srcaddr", label, len, af, src_host);
4783         expand_label_addr("$dstaddr", label, len, af, dst_host);
4784         expand_label_port("$srcport", label, len, src_port);
4785         expand_label_port("$dstport", label, len, dst_port);
4786         expand_label_proto("$proto", label, len, proto);
4787         expand_label_nr("$nr", label, len);
4788 }
4789
4790 int
4791 expand_altq(struct pf_altq *a, struct node_if *interfaces,
4792     struct node_queue *nqueues, struct node_queue_bw bwspec,
4793     struct node_queue_opt *opts)
4794 {
4795         struct pf_altq           pa, pb;
4796         char                     qname[PF_QNAME_SIZE];
4797         struct node_queue       *n;
4798         struct node_queue_bw     bw;
4799         int                      errs = 0;
4800
4801         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4802                 FREE_LIST(struct node_if, interfaces);
4803                 FREE_LIST(struct node_queue, nqueues);
4804                 return (0);
4805         }
4806
4807         LOOP_THROUGH(struct node_if, interface, interfaces,
4808                 memcpy(&pa, a, sizeof(struct pf_altq));
4809                 if (strlcpy(pa.ifname, interface->ifname,
4810                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4811                         errx(1, "expand_altq: strlcpy");
4812
4813                 if (interface->not) {
4814                         yyerror("altq on ! <interface> is not supported");
4815                         errs++;
4816                 } else {
4817                         if (eval_pfaltq(pf, &pa, &bwspec, opts))
4818                                 errs++;
4819                         else
4820                                 if (pfctl_add_altq(pf, &pa))
4821                                         errs++;
4822
4823                         if (pf->opts & PF_OPT_VERBOSE) {
4824                                 print_altq(&pf->paltq->altq, 0,
4825                                     &bwspec, opts);
4826                                 if (nqueues && nqueues->tail) {
4827                                         printf("queue { ");
4828                                         LOOP_THROUGH(struct node_queue, queue,
4829                                             nqueues,
4830                                                 printf("%s ",
4831                                                     queue->queue);
4832                                         );
4833                                         printf("}");
4834                                 }
4835                                 printf("\n");
4836                         }
4837
4838                         if (pa.scheduler == ALTQT_CBQ ||
4839                             pa.scheduler == ALTQT_HFSC) {
4840                                 /* now create a root queue */
4841                                 memset(&pb, 0, sizeof(struct pf_altq));
4842                                 if (strlcpy(qname, "root_", sizeof(qname)) >=
4843                                     sizeof(qname))
4844                                         errx(1, "expand_altq: strlcpy");
4845                                 if (strlcat(qname, interface->ifname,
4846                                     sizeof(qname)) >= sizeof(qname))
4847                                         errx(1, "expand_altq: strlcat");
4848                                 if (strlcpy(pb.qname, qname,
4849                                     sizeof(pb.qname)) >= sizeof(pb.qname))
4850                                         errx(1, "expand_altq: strlcpy");
4851                                 if (strlcpy(pb.ifname, interface->ifname,
4852                                     sizeof(pb.ifname)) >= sizeof(pb.ifname))
4853                                         errx(1, "expand_altq: strlcpy");
4854                                 pb.qlimit = pa.qlimit;
4855                                 pb.scheduler = pa.scheduler;
4856                                 bw.bw_absolute = pa.ifbandwidth;
4857                                 bw.bw_percent = 0;
4858                                 if (eval_pfqueue(pf, &pb, &bw, opts))
4859                                         errs++;
4860                                 else
4861                                         if (pfctl_add_altq(pf, &pb))
4862                                                 errs++;
4863                         }
4864
4865                         LOOP_THROUGH(struct node_queue, queue, nqueues,
4866                                 n = calloc(1, sizeof(struct node_queue));
4867                                 if (n == NULL)
4868                                         err(1, "expand_altq: calloc");
4869                                 if (pa.scheduler == ALTQT_CBQ ||
4870                                     pa.scheduler == ALTQT_HFSC)
4871                                         if (strlcpy(n->parent, qname,
4872                                             sizeof(n->parent)) >=
4873                                             sizeof(n->parent))
4874                                                 errx(1, "expand_altq: strlcpy");
4875                                 if (strlcpy(n->queue, queue->queue,
4876                                     sizeof(n->queue)) >= sizeof(n->queue))
4877                                         errx(1, "expand_altq: strlcpy");
4878                                 if (strlcpy(n->ifname, interface->ifname,
4879                                     sizeof(n->ifname)) >= sizeof(n->ifname))
4880                                         errx(1, "expand_altq: strlcpy");
4881                                 n->scheduler = pa.scheduler;
4882                                 n->next = NULL;
4883                                 n->tail = n;
4884                                 if (queues == NULL)
4885                                         queues = n;
4886                                 else {
4887                                         queues->tail->next = n;
4888                                         queues->tail = n;
4889                                 }
4890                         );
4891                 }
4892         );
4893         FREE_LIST(struct node_if, interfaces);
4894         FREE_LIST(struct node_queue, nqueues);
4895
4896         return (errs);
4897 }
4898
4899 int
4900 expand_queue(struct pf_altq *a, struct node_if *interfaces,
4901     struct node_queue *nqueues, struct node_queue_bw bwspec,
4902     struct node_queue_opt *opts)
4903 {
4904         struct node_queue       *n, *nq;
4905         struct pf_altq           pa;
4906         u_int8_t                 found = 0;
4907         u_int8_t                 errs = 0;
4908
4909         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
4910                 FREE_LIST(struct node_queue, nqueues);
4911                 return (0);
4912         }
4913
4914         if (queues == NULL) {
4915                 yyerror("queue %s has no parent", a->qname);
4916                 FREE_LIST(struct node_queue, nqueues);
4917                 return (1);
4918         }
4919
4920         LOOP_THROUGH(struct node_if, interface, interfaces,
4921                 LOOP_THROUGH(struct node_queue, tqueue, queues,
4922                         if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
4923                             (interface->ifname[0] == 0 ||
4924                             (!interface->not && !strncmp(interface->ifname,
4925                             tqueue->ifname, IFNAMSIZ)) ||
4926                             (interface->not && strncmp(interface->ifname,
4927                             tqueue->ifname, IFNAMSIZ)))) {
4928                                 /* found ourself in queues */
4929                                 found++;
4930
4931                                 memcpy(&pa, a, sizeof(struct pf_altq));
4932
4933                                 if (pa.scheduler != ALTQT_NONE &&
4934                                     pa.scheduler != tqueue->scheduler) {
4935                                         yyerror("exactly one scheduler type "
4936                                             "per interface allowed");
4937                                         return (1);
4938                                 }
4939                                 pa.scheduler = tqueue->scheduler;
4940
4941                                 /* scheduler dependent error checking */
4942                                 switch (pa.scheduler) {
4943                                 case ALTQT_PRIQ:
4944                                         if (nqueues != NULL) {
4945                                                 yyerror("priq queues cannot "
4946                                                     "have child queues");
4947                                                 return (1);
4948                                         }
4949                                         if (bwspec.bw_absolute > 0 ||
4950                                             bwspec.bw_percent < 100) {
4951                                                 yyerror("priq doesn't take "
4952                                                     "bandwidth");
4953                                                 return (1);
4954                                         }
4955                                         break;
4956                                 default:
4957                                         break;
4958                                 }
4959
4960                                 if (strlcpy(pa.ifname, tqueue->ifname,
4961                                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
4962                                         errx(1, "expand_queue: strlcpy");
4963                                 if (strlcpy(pa.parent, tqueue->parent,
4964                                     sizeof(pa.parent)) >= sizeof(pa.parent))
4965                                         errx(1, "expand_queue: strlcpy");
4966
4967                                 if (eval_pfqueue(pf, &pa, &bwspec, opts))
4968                                         errs++;
4969                                 else
4970                                         if (pfctl_add_altq(pf, &pa))
4971                                                 errs++;
4972
4973                                 for (nq = nqueues; nq != NULL; nq = nq->next) {
4974                                         if (!strcmp(a->qname, nq->queue)) {
4975                                                 yyerror("queue cannot have "
4976                                                     "itself as child");
4977                                                 errs++;
4978                                                 continue;
4979                                         }
4980                                         n = calloc(1,
4981                                             sizeof(struct node_queue));
4982                                         if (n == NULL)
4983                                                 err(1, "expand_queue: calloc");
4984                                         if (strlcpy(n->parent, a->qname,
4985                                             sizeof(n->parent)) >=
4986                                             sizeof(n->parent))
4987                                                 errx(1, "expand_queue strlcpy");
4988                                         if (strlcpy(n->queue, nq->queue,
4989                                             sizeof(n->queue)) >=
4990                                             sizeof(n->queue))
4991                                                 errx(1, "expand_queue strlcpy");
4992                                         if (strlcpy(n->ifname, tqueue->ifname,
4993                                             sizeof(n->ifname)) >=
4994                                             sizeof(n->ifname))
4995                                                 errx(1, "expand_queue strlcpy");
4996                                         n->scheduler = tqueue->scheduler;
4997                                         n->next = NULL;
4998                                         n->tail = n;
4999                                         if (queues == NULL)
5000                                                 queues = n;
5001                                         else {
5002                                                 queues->tail->next = n;
5003                                                 queues->tail = n;
5004                                         }
5005                                 }
5006                                 if ((pf->opts & PF_OPT_VERBOSE) && (
5007                                     (found == 1 && interface->ifname[0] == 0) ||
5008                                     (found > 0 && interface->ifname[0] != 0))) {
5009                                         print_queue(&pf->paltq->altq, 0,
5010                                             &bwspec, interface->ifname[0] != 0,
5011                                             opts);
5012                                         if (nqueues && nqueues->tail) {
5013                                                 printf("{ ");
5014                                                 LOOP_THROUGH(struct node_queue,
5015                                                     queue, nqueues,
5016                                                         printf("%s ",
5017                                                             queue->queue);
5018                                                 );
5019                                                 printf("}");
5020                                         }
5021                                         printf("\n");
5022                                 }
5023                         }
5024                 );
5025         );
5026
5027         FREE_LIST(struct node_queue, nqueues);
5028         FREE_LIST(struct node_if, interfaces);
5029
5030         if (!found) {
5031                 yyerror("queue %s has no parent", a->qname);
5032                 errs++;
5033         }
5034
5035         if (errs)
5036                 return (1);
5037         else
5038                 return (0);
5039 }
5040
5041 void
5042 expand_rule(struct pf_rule *r,
5043     struct node_if *interfaces, struct node_host *rpool_hosts,
5044     struct node_proto *protos, struct node_os *src_oses,
5045     struct node_host *src_hosts, struct node_port *src_ports,
5046     struct node_host *dst_hosts, struct node_port *dst_ports,
5047     struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types,
5048     const char *anchor_call)
5049 {
5050         sa_family_t              af = r->af;
5051         int                      added = 0, error = 0;
5052         char                     ifname[IF_NAMESIZE];
5053         char                     label[PF_RULE_LABEL_SIZE];
5054         char                     tagname[PF_TAG_NAME_SIZE];
5055         char                     match_tagname[PF_TAG_NAME_SIZE];
5056         struct pf_pooladdr      *pa;
5057         struct node_host        *h;
5058         u_int8_t                 flags, flagset, keep_state;
5059
5060         if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label))
5061                 errx(1, "expand_rule: strlcpy");
5062         if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
5063                 errx(1, "expand_rule: strlcpy");
5064         if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
5065             sizeof(match_tagname))
5066                 errx(1, "expand_rule: strlcpy");
5067         flags = r->flags;
5068         flagset = r->flagset;
5069         keep_state = r->keep_state;
5070
5071         LOOP_THROUGH(struct node_if, interface, interfaces,
5072         LOOP_THROUGH(struct node_proto, proto, protos,
5073         LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
5074         LOOP_THROUGH(struct node_host, src_host, src_hosts,
5075         LOOP_THROUGH(struct node_port, src_port, src_ports,
5076         LOOP_THROUGH(struct node_os, src_os, src_oses,
5077         LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
5078         LOOP_THROUGH(struct node_port, dst_port, dst_ports,
5079         LOOP_THROUGH(struct node_uid, uid, uids,
5080         LOOP_THROUGH(struct node_gid, gid, gids,
5081
5082                 r->af = af;
5083                 /* for link-local IPv6 address, interface must match up */
5084                 if ((r->af && src_host->af && r->af != src_host->af) ||
5085                     (r->af && dst_host->af && r->af != dst_host->af) ||
5086                     (src_host->af && dst_host->af &&
5087                     src_host->af != dst_host->af) ||
5088                     (src_host->ifindex && dst_host->ifindex &&
5089                     src_host->ifindex != dst_host->ifindex) ||
5090                     (src_host->ifindex && *interface->ifname &&
5091                     src_host->ifindex != if_nametoindex(interface->ifname)) ||
5092                     (dst_host->ifindex && *interface->ifname &&
5093                     dst_host->ifindex != if_nametoindex(interface->ifname)))
5094                         continue;
5095                 if (!r->af && src_host->af)
5096                         r->af = src_host->af;
5097                 else if (!r->af && dst_host->af)
5098                         r->af = dst_host->af;
5099
5100                 if (*interface->ifname)
5101                         strlcpy(r->ifname, interface->ifname,
5102                             sizeof(r->ifname));
5103                 else if (if_indextoname(src_host->ifindex, ifname))
5104                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5105                 else if (if_indextoname(dst_host->ifindex, ifname))
5106                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5107                 else
5108                         memset(r->ifname, '\0', sizeof(r->ifname));
5109
5110                 if (strlcpy(r->label, label, sizeof(r->label)) >=
5111                     sizeof(r->label))
5112                         errx(1, "expand_rule: strlcpy");
5113                 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
5114                     sizeof(r->tagname))
5115                         errx(1, "expand_rule: strlcpy");
5116                 if (strlcpy(r->match_tagname, match_tagname,
5117                     sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
5118                         errx(1, "expand_rule: strlcpy");
5119                 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af,
5120                     src_host, src_port, dst_host, dst_port, proto->proto);
5121                 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
5122                     src_host, src_port, dst_host, dst_port, proto->proto);
5123                 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
5124                     r->af, src_host, src_port, dst_host, dst_port,
5125                     proto->proto);
5126
5127                 error += check_netmask(src_host, r->af);
5128                 error += check_netmask(dst_host, r->af);
5129
5130                 r->ifnot = interface->not;
5131                 r->proto = proto->proto;
5132                 r->src.addr = src_host->addr;
5133                 r->src.neg = src_host->not;
5134                 r->src.port[0] = src_port->port[0];
5135                 r->src.port[1] = src_port->port[1];
5136                 r->src.port_op = src_port->op;
5137                 r->dst.addr = dst_host->addr;
5138                 r->dst.neg = dst_host->not;
5139                 r->dst.port[0] = dst_port->port[0];
5140                 r->dst.port[1] = dst_port->port[1];
5141                 r->dst.port_op = dst_port->op;
5142                 r->uid.op = uid->op;
5143                 r->uid.uid[0] = uid->uid[0];
5144                 r->uid.uid[1] = uid->uid[1];
5145                 r->gid.op = gid->op;
5146                 r->gid.gid[0] = gid->gid[0];
5147                 r->gid.gid[1] = gid->gid[1];
5148                 r->type = icmp_type->type;
5149                 r->code = icmp_type->code;
5150
5151                 if ((keep_state == PF_STATE_MODULATE ||
5152                     keep_state == PF_STATE_SYNPROXY) &&
5153                     r->proto && r->proto != IPPROTO_TCP)
5154                         r->keep_state = PF_STATE_NORMAL;
5155                 else
5156                         r->keep_state = keep_state;
5157
5158                 if (r->proto && r->proto != IPPROTO_TCP) {
5159                         r->flags = 0;
5160                         r->flagset = 0;
5161                 } else {
5162                         r->flags = flags;
5163                         r->flagset = flagset;
5164                 }
5165                 if (icmp_type->proto && r->proto != icmp_type->proto) {
5166                         yyerror("icmp-type mismatch");
5167                         error++;
5168                 }
5169
5170                 if (src_os && src_os->os) {
5171                         r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5172                         if ((pf->opts & PF_OPT_VERBOSE2) &&
5173                             r->os_fingerprint == PF_OSFP_NOMATCH)
5174                                 fprintf(stderr,
5175                                     "warning: unknown '%s' OS fingerprint\n",
5176                                     src_os->os);
5177                 } else {
5178                         r->os_fingerprint = PF_OSFP_ANY;
5179                 }
5180
5181                 TAILQ_INIT(&r->rpool.list);
5182                 for (h = rpool_hosts; h != NULL; h = h->next) {
5183                         pa = calloc(1, sizeof(struct pf_pooladdr));
5184                         if (pa == NULL)
5185                                 err(1, "expand_rule: calloc");
5186                         pa->addr = h->addr;
5187                         if (h->ifname != NULL) {
5188                                 if (strlcpy(pa->ifname, h->ifname,
5189                                     sizeof(pa->ifname)) >=
5190                                     sizeof(pa->ifname))
5191                                         errx(1, "expand_rule: strlcpy");
5192                         } else
5193                                 pa->ifname[0] = 0;
5194                         TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
5195                 }
5196
5197                 if (rule_consistent(r, anchor_call[0]) < 0 || error)
5198                         yyerror("skipping rule due to errors");
5199                 else {
5200                         r->nr = pf->astack[pf->asd]->match++;
5201                         pfctl_add_rule(pf, r, anchor_call);
5202                         added++;
5203                 }
5204
5205         ))))))))));
5206
5207         FREE_LIST(struct node_if, interfaces);
5208         FREE_LIST(struct node_proto, protos);
5209         FREE_LIST(struct node_host, src_hosts);
5210         FREE_LIST(struct node_port, src_ports);
5211         FREE_LIST(struct node_os, src_oses);
5212         FREE_LIST(struct node_host, dst_hosts);
5213         FREE_LIST(struct node_port, dst_ports);
5214         FREE_LIST(struct node_uid, uids);
5215         FREE_LIST(struct node_gid, gids);
5216         FREE_LIST(struct node_icmp, icmp_types);
5217         FREE_LIST(struct node_host, rpool_hosts);
5218
5219         if (!added)
5220                 yyerror("rule expands to no valid combination");
5221 }
5222
5223 int
5224 expand_skip_interface(struct node_if *interfaces)
5225 {
5226         int     errs = 0;
5227
5228         if (!interfaces || (!interfaces->next && !interfaces->not &&
5229             !strcmp(interfaces->ifname, "none"))) {
5230                 if (pf->opts & PF_OPT_VERBOSE)
5231                         printf("set skip on none\n");
5232                 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
5233                 return (errs);
5234         }
5235
5236         if (pf->opts & PF_OPT_VERBOSE)
5237                 printf("set skip on {");
5238         LOOP_THROUGH(struct node_if, interface, interfaces,
5239                 if (pf->opts & PF_OPT_VERBOSE)
5240                         printf(" %s", interface->ifname);
5241                 if (interface->not) {
5242                         yyerror("skip on ! <interface> is not supported");
5243                         errs++;
5244                 } else
5245                         errs += pfctl_set_interface_flags(pf,
5246                             interface->ifname, PFI_IFLAG_SKIP, 1);
5247         );
5248         if (pf->opts & PF_OPT_VERBOSE)
5249                 printf(" }\n");
5250
5251         FREE_LIST(struct node_if, interfaces);
5252
5253         if (errs)
5254                 return (1);
5255         else
5256                 return (0);
5257 }
5258
5259 #undef FREE_LIST
5260 #undef LOOP_THROUGH
5261
5262 int
5263 check_rulestate(int desired_state)
5264 {
5265         if (require_order && (rulestate > desired_state)) {
5266                 yyerror("Rules must be in order: options, normalization, "
5267                     "queueing, translation, filtering");
5268                 return (1);
5269         }
5270         rulestate = desired_state;
5271         return (0);
5272 }
5273
5274 int
5275 kw_cmp(const void *k, const void *e)
5276 {
5277         return (strcmp(k, ((const struct keywords *)e)->k_name));
5278 }
5279
5280 int
5281 lookup(char *s)
5282 {
5283         /* this has to be sorted always */
5284         static const struct keywords keywords[] = {
5285                 { "all",                ALL},
5286                 { "allow-opts",         ALLOWOPTS},
5287                 { "altq",               ALTQ},
5288                 { "anchor",             ANCHOR},
5289                 { "antispoof",          ANTISPOOF},
5290                 { "any",                ANY},
5291                 { "bandwidth",          BANDWIDTH},
5292                 { "binat",              BINAT},
5293                 { "binat-anchor",       BINATANCHOR},
5294                 { "bitmask",            BITMASK},
5295                 { "block",              BLOCK},
5296                 { "block-policy",       BLOCKPOLICY},
5297                 { "buckets",            BUCKETS},
5298                 { "cbq",                CBQ},
5299                 { "code",               CODE},
5300                 { "crop",               FRAGCROP},
5301                 { "debug",              DEBUG},
5302                 { "divert-reply",       DIVERTREPLY},
5303                 { "divert-to",          DIVERTTO},
5304                 { "drop",               DROP},
5305                 { "drop-ovl",           FRAGDROP},
5306                 { "dup-to",             DUPTO},
5307                 { "fairq",              FAIRQ},
5308                 { "fastroute",          FASTROUTE},
5309                 { "file",               FILENAME},
5310                 { "fingerprints",       FINGERPRINTS},
5311                 { "flags",              FLAGS},
5312                 { "floating",           FLOATING},
5313                 { "flush",              FLUSH},
5314                 { "for",                FOR},
5315                 { "fragment",           FRAGMENT},
5316                 { "from",               FROM},
5317                 { "global",             GLOBAL},
5318                 { "group",              GROUP},
5319                 { "hfsc",               HFSC},
5320                 { "hogs",               HOGS},
5321                 { "hostid",             HOSTID},
5322                 { "icmp-type",          ICMPTYPE},
5323                 { "icmp6-type",         ICMP6TYPE},
5324                 { "if-bound",           IFBOUND},
5325                 { "in",                 IN},
5326                 { "include",            INCLUDE},
5327                 { "inet",               INET},
5328                 { "inet6",              INET6},
5329                 { "keep",               KEEP},
5330                 { "label",              LABEL},
5331                 { "limit",              LIMIT},
5332                 { "linkshare",          LINKSHARE},
5333                 { "load",               LOAD},
5334                 { "log",                LOG},
5335                 { "loginterface",       LOGINTERFACE},
5336                 { "max",                MAXIMUM},
5337                 { "max-mss",            MAXMSS},
5338                 { "max-src-conn",       MAXSRCCONN},
5339                 { "max-src-conn-rate",  MAXSRCCONNRATE},
5340                 { "max-src-nodes",      MAXSRCNODES},
5341                 { "max-src-states",     MAXSRCSTATES},
5342                 { "min-ttl",            MINTTL},
5343                 { "modulate",           MODULATE},
5344                 { "nat",                NAT},
5345                 { "nat-anchor",         NATANCHOR},
5346                 { "no",                 NO},
5347                 { "no-df",              NODF},
5348                 { "no-route",           NOROUTE},
5349                 { "no-sync",            NOSYNC},
5350                 { "on",                 ON},
5351                 { "optimization",       OPTIMIZATION},
5352                 { "os",                 OS},
5353                 { "out",                OUT},
5354                 { "overload",           OVERLOAD},
5355                 { "pass",               PASS},
5356                 { "port",               PORT},
5357                 { "priority",           PRIORITY},
5358                 { "priq",               PRIQ},
5359                 { "probability",        PROBABILITY},
5360                 { "proto",              PROTO},
5361                 { "qlimit",             QLIMIT},
5362                 { "queue",              QUEUE},
5363                 { "quick",              QUICK},
5364                 { "random",             RANDOM},
5365                 { "random-id",          RANDOMID},
5366                 { "rdr",                RDR},
5367                 { "rdr-anchor",         RDRANCHOR},
5368                 { "realtime",           REALTIME},
5369                 { "reassemble",         REASSEMBLE},
5370                 { "reply-to",           REPLYTO},
5371                 { "require-order",      REQUIREORDER},
5372                 { "return",             RETURN},
5373                 { "return-icmp",        RETURNICMP},
5374                 { "return-icmp6",       RETURNICMP6},
5375                 { "return-rst",         RETURNRST},
5376                 { "round-robin",        ROUNDROBIN},
5377                 { "route",              ROUTE},
5378                 { "route-to",           ROUTETO},
5379                 { "rtable",             RTABLE},
5380                 { "rule",               RULE},
5381                 { "ruleset-optimization",       RULESET_OPTIMIZATION},
5382                 { "scrub",              SCRUB},
5383                 { "set",                SET},
5384                 { "set-tos",            SETTOS},
5385                 { "skip",               SKIP},
5386                 { "sloppy",             SLOPPY},
5387                 { "source-hash",        SOURCEHASH},
5388                 { "source-track",       SOURCETRACK},
5389                 { "state",              STATE},
5390                 { "state-defaults",     STATEDEFAULTS},
5391                 { "state-policy",       STATEPOLICY},
5392                 { "static-port",        STATICPORT},
5393                 { "sticky-address",     STICKYADDRESS},
5394                 { "synproxy",           SYNPROXY},
5395                 { "table",              TABLE},
5396                 { "tag",                TAG},
5397                 { "tagged",             TAGGED},
5398                 { "tbrsize",            TBRSIZE},
5399                 { "timeout",            TIMEOUT},
5400                 { "to",                 TO},
5401                 { "tos",                TOS},
5402                 { "ttl",                TTL},
5403                 { "upperlimit",         UPPERLIMIT},
5404                 { "urpf-failed",        URPFFAILED},
5405                 { "user",               USER},
5406         };
5407         const struct keywords   *p;
5408
5409         p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5410             sizeof(keywords[0]), kw_cmp);
5411
5412         if (p) {
5413                 if (debug > 1)
5414                         fprintf(stderr, "%s: %d\n", s, p->k_val);
5415                 return (p->k_val);
5416         } else {
5417                 if (debug > 1)
5418                         fprintf(stderr, "string: %s\n", s);
5419                 return (STRING);
5420         }
5421 }
5422
5423 #define MAXPUSHBACK     128
5424
5425 char    *parsebuf;
5426 int      parseindex;
5427 char     pushback_buffer[MAXPUSHBACK];
5428 int      pushback_index = 0;
5429
5430 int
5431 lgetc(int quotec)
5432 {
5433         int             c, next;
5434
5435         if (parsebuf) {
5436                 /* Read character from the parsebuffer instead of input. */
5437                 if (parseindex >= 0) {
5438                         c = parsebuf[parseindex++];
5439                         if (c != '\0')
5440                                 return (c);
5441                         parsebuf = NULL;
5442                 } else
5443                         parseindex++;
5444         }
5445
5446         if (pushback_index)
5447                 return (pushback_buffer[--pushback_index]);
5448
5449         if (quotec) {
5450                 if ((c = getc(file->stream)) == EOF) {
5451                         yyerror("reached end of file while parsing quoted string");
5452                         if (popfile() == EOF)
5453                                 return (EOF);
5454                         return (quotec);
5455                 }
5456                 return (c);
5457         }
5458
5459         while ((c = getc(file->stream)) == '\\') {
5460                 next = getc(file->stream);
5461                 if (next != '\n') {
5462                         c = next;
5463                         break;
5464                 }
5465                 yylval.lineno = file->lineno;
5466                 file->lineno++;
5467         }
5468
5469         while (c == EOF) {
5470                 if (popfile() == EOF)
5471                         return (EOF);
5472                 c = getc(file->stream);
5473         }
5474         return (c);
5475 }
5476
5477 int
5478 lungetc(int c)
5479 {
5480         if (c == EOF)
5481                 return (EOF);
5482         if (parsebuf) {
5483                 parseindex--;
5484                 if (parseindex >= 0)
5485                         return (c);
5486         }
5487         if (pushback_index < MAXPUSHBACK-1)
5488                 return (pushback_buffer[pushback_index++] = c);
5489         else
5490                 return (EOF);
5491 }
5492
5493 int
5494 findeol(void)
5495 {
5496         int     c;
5497
5498         parsebuf = NULL;
5499
5500         /* skip to either EOF or the first real EOL */
5501         while (1) {
5502                 if (pushback_index)
5503                         c = pushback_buffer[--pushback_index];
5504                 else
5505                         c = lgetc(0);
5506                 if (c == '\n') {
5507                         file->lineno++;
5508                         break;
5509                 }
5510                 if (c == EOF)
5511                         break;
5512         }
5513         return (ERROR);
5514 }
5515
5516 int
5517 yylex(void)
5518 {
5519         char     buf[8096];
5520         char    *p, *val;
5521         int      quotec, next, c;
5522         int      token;
5523
5524 top:
5525         p = buf;
5526         while ((c = lgetc(0)) == ' ' || c == '\t')
5527                 ; /* nothing */
5528
5529         yylval.lineno = file->lineno;
5530         if (c == '#')
5531                 while ((c = lgetc(0)) != '\n' && c != EOF)
5532                         ; /* nothing */
5533         if (c == '$' && parsebuf == NULL) {
5534                 while (1) {
5535                         if ((c = lgetc(0)) == EOF)
5536                                 return (0);
5537
5538                         if (p + 1 >= buf + sizeof(buf) - 1) {
5539                                 yyerror("string too long");
5540                                 return (findeol());
5541                         }
5542                         if (isalnum(c) || c == '_') {
5543                                 *p++ = (char)c;
5544                                 continue;
5545                         }
5546                         *p = '\0';
5547                         lungetc(c);
5548                         break;
5549                 }
5550                 val = symget(buf);
5551                 if (val == NULL) {
5552                         yyerror("macro '%s' not defined", buf);
5553                         return (findeol());
5554                 }
5555                 parsebuf = val;
5556                 parseindex = 0;
5557                 goto top;
5558         }
5559
5560         switch (c) {
5561         case '\'':
5562         case '"':
5563                 quotec = c;
5564                 while (1) {
5565                         if ((c = lgetc(quotec)) == EOF)
5566                                 return (0);
5567                         if (c == '\n') {
5568                                 file->lineno++;
5569                                 continue;
5570                         } else if (c == '\\') {
5571                                 if ((next = lgetc(quotec)) == EOF)
5572                                         return (0);
5573                                 if (next == quotec || c == ' ' || c == '\t')
5574                                         c = next;
5575                                 else if (next == '\n')
5576                                         continue;
5577                                 else
5578                                         lungetc(next);
5579                         } else if (c == quotec) {
5580                                 *p = '\0';
5581                                 break;
5582                         }
5583                         if (p + 1 >= buf + sizeof(buf) - 1) {
5584                                 yyerror("string too long");
5585                                 return (findeol());
5586                         }
5587                         *p++ = (char)c;
5588                 }
5589                 yylval.v.string = strdup(buf);
5590                 if (yylval.v.string == NULL)
5591                         err(1, "yylex: strdup");
5592                 return (STRING);
5593         case '<':
5594                 next = lgetc(0);
5595                 if (next == '>') {
5596                         yylval.v.i = PF_OP_XRG;
5597                         return (PORTBINARY);
5598                 }
5599                 lungetc(next);
5600                 break;
5601         case '>':
5602                 next = lgetc(0);
5603                 if (next == '<') {
5604                         yylval.v.i = PF_OP_IRG;
5605                         return (PORTBINARY);
5606                 }
5607                 lungetc(next);
5608                 break;
5609         case '-':
5610                 next = lgetc(0);
5611                 if (next == '>')
5612                         return (ARROW);
5613                 lungetc(next);
5614                 break;
5615         }
5616
5617 #define allowed_to_end_number(x) \
5618         (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5619
5620         if (c == '-' || isdigit(c)) {
5621                 do {
5622                         *p++ = c;
5623                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5624                                 yyerror("string too long");
5625                                 return (findeol());
5626                         }
5627                 } while ((c = lgetc(0)) != EOF && isdigit(c));
5628                 lungetc(c);
5629                 if (p == buf + 1 && buf[0] == '-')
5630                         goto nodigits;
5631                 if (c == EOF || allowed_to_end_number(c)) {
5632                         const char *errstr = NULL;
5633
5634                         *p = '\0';
5635                         yylval.v.number = strtonum(buf, LLONG_MIN,
5636                             LLONG_MAX, &errstr);
5637                         if (errstr) {
5638                                 yyerror("\"%s\" invalid number: %s",
5639                                     buf, errstr);
5640                                 return (findeol());
5641                         }
5642                         return (NUMBER);
5643                 } else {
5644 nodigits:
5645                         while (p > buf + 1)
5646                                 lungetc(*--p);
5647                         c = *--p;
5648                         if (c == '-')
5649                                 return (c);
5650                 }
5651         }
5652
5653 #define allowed_in_string(x) \
5654         (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
5655         x != '{' && x != '}' && x != '<' && x != '>' && \
5656         x != '!' && x != '=' && x != '/' && x != '#' && \
5657         x != ','))
5658
5659         if (isalnum(c) || c == ':' || c == '_') {
5660                 do {
5661                         *p++ = c;
5662                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5663                                 yyerror("string too long");
5664                                 return (findeol());
5665                         }
5666                 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
5667                 lungetc(c);
5668                 *p = '\0';
5669                 if ((token = lookup(buf)) == STRING)
5670                         if ((yylval.v.string = strdup(buf)) == NULL)
5671                                 err(1, "yylex: strdup");
5672                 return (token);
5673         }
5674         if (c == '\n') {
5675                 yylval.lineno = file->lineno;
5676                 file->lineno++;
5677         }
5678         if (c == EOF)
5679                 return (0);
5680         return (c);
5681 }
5682
5683 int
5684 check_file_secrecy(int fd, const char *fname)
5685 {
5686         struct stat     st;
5687
5688         if (fstat(fd, &st)) {
5689                 warn("cannot stat %s", fname);
5690                 return (-1);
5691         }
5692         if (st.st_uid != 0 && st.st_uid != getuid()) {
5693                 warnx("%s: owner not root or current user", fname);
5694                 return (-1);
5695         }
5696         if (st.st_mode & (S_IRWXG | S_IRWXO)) {
5697                 warnx("%s: group/world readable/writeable", fname);
5698                 return (-1);
5699         }
5700         return (0);
5701 }
5702
5703 struct file *
5704 pushfile(const char *name, int secret)
5705 {
5706         struct file     *nfile;
5707
5708         if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
5709             (nfile->name = strdup(name)) == NULL) {
5710                 warn("malloc");
5711                 return (NULL);
5712         }
5713         if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
5714                 nfile->stream = stdin;
5715                 free(nfile->name);
5716                 if ((nfile->name = strdup("stdin")) == NULL) {
5717                         warn("strdup");
5718                         free(nfile);
5719                         return (NULL);
5720                 }
5721         } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
5722                 warn("%s", nfile->name);
5723                 free(nfile->name);
5724                 free(nfile);
5725                 return (NULL);
5726         } else if (secret &&
5727             check_file_secrecy(fileno(nfile->stream), nfile->name)) {
5728                 fclose(nfile->stream);
5729                 free(nfile->name);
5730                 free(nfile);
5731                 return (NULL);
5732         }
5733         nfile->lineno = 1;
5734         TAILQ_INSERT_TAIL(&files, nfile, entry);
5735         return (nfile);
5736 }
5737
5738 int
5739 popfile(void)
5740 {
5741         struct file     *prev;
5742
5743         if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
5744                 prev->errors += file->errors;
5745                 TAILQ_REMOVE(&files, file, entry);
5746                 fclose(file->stream);
5747                 free(file->name);
5748                 free(file);
5749                 file = prev;
5750                 return (0);
5751         }
5752         return (EOF);
5753 }
5754
5755 int
5756 parse_config(char *filename, struct pfctl *xpf)
5757 {
5758         int              errors = 0;
5759         struct sym      *sym;
5760
5761         pf = xpf;
5762         errors = 0;
5763         rulestate = PFCTL_STATE_NONE;
5764         returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
5765         returnicmp6default =
5766             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
5767         blockpolicy = PFRULE_DROP;
5768         require_order = 1;
5769
5770         if ((file = pushfile(filename, 0)) == NULL) {
5771                 warn("cannot open the main config file!");
5772                 return (-1);
5773         }
5774
5775         yyparse();
5776         errors = file->errors;
5777         popfile();
5778
5779         /* Free macros and check which have not been used. */
5780         while ((sym = TAILQ_FIRST(&symhead))) {
5781                 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
5782                         fprintf(stderr, "warning: macro '%s' not "
5783                             "used\n", sym->nam);
5784                 free(sym->nam);
5785                 free(sym->val);
5786                 TAILQ_REMOVE(&symhead, sym, entry);
5787                 free(sym);
5788         }
5789
5790         return (errors ? -1 : 0);
5791 }
5792
5793 int
5794 symset(const char *nam, const char *val, int persist)
5795 {
5796         struct sym      *sym;
5797
5798         for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
5799             sym = TAILQ_NEXT(sym, entry))
5800                 ;       /* nothing */
5801
5802         if (sym != NULL) {
5803                 if (sym->persist == 1)
5804                         return (0);
5805                 else {
5806                         free(sym->nam);
5807                         free(sym->val);
5808                         TAILQ_REMOVE(&symhead, sym, entry);
5809                         free(sym);
5810                 }
5811         }
5812         if ((sym = calloc(1, sizeof(*sym))) == NULL)
5813                 return (-1);
5814
5815         sym->nam = strdup(nam);
5816         if (sym->nam == NULL) {
5817                 free(sym);
5818                 return (-1);
5819         }
5820         sym->val = strdup(val);
5821         if (sym->val == NULL) {
5822                 free(sym->nam);
5823                 free(sym);
5824                 return (-1);
5825         }
5826         sym->used = 0;
5827         sym->persist = persist;
5828         TAILQ_INSERT_TAIL(&symhead, sym, entry);
5829         return (0);
5830 }
5831
5832 int
5833 pfctl_cmdline_symset(char *s)
5834 {
5835         char    *sym, *val;
5836         int      ret;
5837
5838         if ((val = strrchr(s, '=')) == NULL)
5839                 return (-1);
5840
5841         if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
5842                 err(1, "pfctl_cmdline_symset: malloc");
5843
5844         strlcpy(sym, s, strlen(s) - strlen(val) + 1);
5845
5846         ret = symset(sym, val + 1, 1);
5847         free(sym);
5848
5849         return (ret);
5850 }
5851
5852 char *
5853 symget(const char *nam)
5854 {
5855         struct sym      *sym;
5856
5857         TAILQ_FOREACH(sym, &symhead, entry)
5858                 if (strcmp(nam, sym->nam) == 0) {
5859                         sym->used = 1;
5860                         return (sym->val);
5861                 }
5862         return (NULL);
5863 }
5864
5865 void
5866 mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst)
5867 {
5868         int i;
5869         struct pf_rule *r;
5870
5871         for (i = 0; i < PF_RULESET_MAX; ++i) {
5872                 while ((r = TAILQ_FIRST(src->rules[i].active.ptr))
5873                     != NULL) {
5874                         TAILQ_REMOVE(src->rules[i].active.ptr, r, entries);
5875                         TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries);
5876                         dst->anchor->match++;
5877                 }
5878                 src->anchor->match = 0;
5879                 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr))
5880                     != NULL) {
5881                         TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries);
5882                         TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr,
5883                                 r, entries);
5884                 }
5885         }
5886 }
5887
5888 void
5889 decide_address_family(struct node_host *n, sa_family_t *af)
5890 {
5891         if (*af != 0 || n == NULL)
5892                 return;
5893         *af = n->af;
5894         while ((n = n->next) != NULL) {
5895                 if (n->af != *af) {
5896                         *af = 0;
5897                         return;
5898                 }
5899         }
5900 }
5901
5902 void
5903 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
5904 {
5905         struct node_host        *n = *nh, *prev = NULL;
5906
5907         while (n != NULL) {
5908                 if (*af && n->af && n->af != *af) {
5909                         /* unlink and free n */
5910                         struct node_host *next = n->next;
5911
5912                         /* adjust tail pointer */
5913                         if (n == (*nh)->tail)
5914                                 (*nh)->tail = prev;
5915                         /* adjust previous node's next pointer */
5916                         if (prev == NULL)
5917                                 *nh = next;
5918                         else
5919                                 prev->next = next;
5920                         /* free node */
5921                         if (n->ifname != NULL)
5922                                 free(n->ifname);
5923                         free(n);
5924                         n = next;
5925                 } else {
5926                         if (n->af && !*af)
5927                                 *af = n->af;
5928                         prev = n;
5929                         n = n->next;
5930                 }
5931         }
5932 }
5933
5934 int
5935 invalid_redirect(struct node_host *nh, sa_family_t af)
5936 {
5937         if (!af) {
5938                 struct node_host *n;
5939
5940                 /* tables and dyniftl are ok without an address family */
5941                 for (n = nh; n != NULL; n = n->next) {
5942                         if (n->addr.type != PF_ADDR_TABLE &&
5943                             n->addr.type != PF_ADDR_DYNIFTL) {
5944                                 yyerror("address family not given and "
5945                                     "translation address expands to multiple "
5946                                     "address families");
5947                                 return (1);
5948                         }
5949                 }
5950         }
5951         if (nh == NULL) {
5952                 yyerror("no translation address with matching address family "
5953                     "found.");
5954                 return (1);
5955         }
5956         return (0);
5957 }
5958
5959 int
5960 atoul(char *s, u_long *ulvalp)
5961 {
5962         u_long   ulval;
5963         char    *ep;
5964
5965         errno = 0;
5966         ulval = strtoul(s, &ep, 0);
5967         if (s[0] == '\0' || *ep != '\0')
5968                 return (-1);
5969         if (errno == ERANGE && ulval == ULONG_MAX)
5970                 return (-1);
5971         *ulvalp = ulval;
5972         return (0);
5973 }
5974
5975 int
5976 getservice(char *n)
5977 {
5978         struct servent  *s;
5979         u_long           ulval;
5980
5981         if (atoul(n, &ulval) == 0) {
5982                 if (ulval > 65535) {
5983                         yyerror("illegal port value %lu", ulval);
5984                         return (-1);
5985                 }
5986                 return (htons(ulval));
5987         } else {
5988                 s = getservbyname(n, "tcp");
5989                 if (s == NULL)
5990                         s = getservbyname(n, "udp");
5991                 if (s == NULL) {
5992                         yyerror("unknown port %s", n);
5993                         return (-1);
5994                 }
5995                 return (s->s_port);
5996         }
5997 }
5998
5999 int
6000 rule_label(struct pf_rule *r, char *s)
6001 {
6002         if (s) {
6003                 if (strlcpy(r->label, s, sizeof(r->label)) >=
6004                     sizeof(r->label)) {
6005                         yyerror("rule label too long (max %d chars)",
6006                             sizeof(r->label)-1);
6007                         return (-1);
6008                 }
6009         }
6010         return (0);
6011 }
6012
6013 u_int16_t
6014 parseicmpspec(char *w, sa_family_t af)
6015 {
6016         const struct icmpcodeent        *p;
6017         u_long                           ulval;
6018         u_int8_t                         icmptype;
6019
6020         if (af == AF_INET)
6021                 icmptype = returnicmpdefault >> 8;
6022         else
6023                 icmptype = returnicmp6default >> 8;
6024
6025         if (atoul(w, &ulval) == -1) {
6026                 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
6027                         yyerror("unknown icmp code %s", w);
6028                         return (0);
6029                 }
6030                 ulval = p->code;
6031         }
6032         if (ulval > 255) {
6033                 yyerror("invalid icmp code %lu", ulval);
6034                 return (0);
6035         }
6036         return (icmptype << 8 | ulval);
6037 }
6038
6039 int
6040 parseport(char *port, struct range *r, int extensions)
6041 {
6042         char    *p = strchr(port, ':');
6043
6044         if (p == NULL) {
6045                 if ((r->a = getservice(port)) == -1)
6046                         return (-1);
6047                 r->b = 0;
6048                 r->t = PF_OP_NONE;
6049                 return (0);
6050         }
6051         if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
6052                 *p = 0;
6053                 if ((r->a = getservice(port)) == -1)
6054                         return (-1);
6055                 r->b = 0;
6056                 r->t = PF_OP_IRG;
6057                 return (0);
6058         }
6059         if ((extensions & PPORT_RANGE)) {
6060                 *p++ = 0;
6061                 if ((r->a = getservice(port)) == -1 ||
6062                     (r->b = getservice(p)) == -1)
6063                         return (-1);
6064                 if (r->a == r->b) {
6065                         r->b = 0;
6066                         r->t = PF_OP_NONE;
6067                 } else
6068                         r->t = PF_OP_RRG;
6069                 return (0);
6070         }
6071         return (-1);
6072 }
6073
6074 int
6075 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
6076 {
6077         struct loadanchors      *la;
6078
6079         TAILQ_FOREACH(la, &loadanchorshead, entries) {
6080                 if (pf->opts & PF_OPT_VERBOSE)
6081                         fprintf(stderr, "\nLoading anchor %s from %s\n",
6082                             la->anchorname, la->filename);
6083                 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
6084                     la->anchorname, trans) == -1)
6085                         return (-1);
6086         }
6087
6088         return (0);
6089 }
6090
6091 int
6092 rt_tableid_max(void)
6093 {
6094 #ifdef __FreeBSD__
6095         int fibs;
6096         size_t l = sizeof(fibs);
6097
6098         if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1)
6099                 fibs = 16;      /* XXX RT_MAXFIBS, at least limit it some. */
6100         /*
6101          * As the OpenBSD code only compares > and not >= we need to adjust
6102          * here given we only accept values of 0..n and want to avoid #ifdefs
6103          * in the grammer.
6104          */
6105         return (fibs - 1);
6106 #else
6107         return (RT_TABLEID_MAX);
6108 #endif
6109 }