sbin/pfctl/parse.y

   1 /*      $OpenBSD: parse.y,v 1.554 2008/10/17 12:59:53 henning Exp $     */
   2
   3 /*-
   4  * SPDX-License-Identifier: BSD-2-Clause
   5  *
   6  * Copyright (c) 2001 Markus Friedl.  All rights reserved.
   7  * Copyright (c) 2001 Daniel Hartmeier.  All rights reserved.
   8  * Copyright (c) 2001 Theo de Raadt.  All rights reserved.
   9  * Copyright (c) 2002,2003 Henning Brauer. All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 %{
  32 #include <sys/cdefs.h>
  33 __FBSDID("$FreeBSD$");
  34
  35 #define PFIOC_USE_LATEST
  36
  37 #include <sys/types.h>
  38 #include <sys/socket.h>
  39 #include <sys/stat.h>
  40 #ifdef __FreeBSD__
  41 #include <sys/sysctl.h>
  42 #endif
  43 #include <net/if.h>
  44 #include <netinet/in.h>
  45 #include <netinet/in_systm.h>
  46 #include <netinet/ip.h>
  47 #include <netinet/ip_icmp.h>
  48 #include <netinet/icmp6.h>
  49 #include <net/pfvar.h>
  50 #include <arpa/inet.h>
  51 #include <net/altq/altq.h>
  52 #include <net/altq/altq_cbq.h>
  53 #include <net/altq/altq_codel.h>
  54 #include <net/altq/altq_priq.h>
  55 #include <net/altq/altq_hfsc.h>
  56 #include <net/altq/altq_fairq.h>
  57
  58 #include <assert.h>
  59 #include <stdio.h>
  60 #include <unistd.h>
  61 #include <stdlib.h>
  62 #include <netdb.h>
  63 #include <stdarg.h>
  64 #include <errno.h>
  65 #include <string.h>
  66 #include <ctype.h>
  67 #include <math.h>
  68 #include <err.h>
  69 #include <limits.h>
  70 #include <pwd.h>
  71 #include <grp.h>
  72 #include <md5.h>
  73
  74 #include "pfctl_parser.h"
  75 #include "pfctl.h"
  76
  77 static struct pfctl     *pf = NULL;
  78 static int               debug = 0;
  79 static int               rulestate = 0;
  80 static u_int16_t         returnicmpdefault =
  81                             (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
  82 static u_int16_t         returnicmp6default =
  83                             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
  84 static int               blockpolicy = PFRULE_DROP;
  85 static int               failpolicy = PFRULE_DROP;
  86 static int               require_order = 1;
  87 static int               default_statelock;
  88
  89 static TAILQ_HEAD(files, file)   files = TAILQ_HEAD_INITIALIZER(files);
  90 static struct file {
  91         TAILQ_ENTRY(file)        entry;
  92         FILE                    *stream;
  93         char                    *name;
  94         int                      lineno;
  95         int                      errors;
  96 } *file;
  97 struct file     *pushfile(const char *, int);
  98 int              popfile(void);
  99 int              check_file_secrecy(int, const char *);
 100 int              yyparse(void);
 101 int              yylex(void);
 102 int              yyerror(const char *, ...);
 103 int              kw_cmp(const void *, const void *);
 104 int              lookup(char *);
 105 int              lgetc(int);
 106 int              lungetc(int);
 107 int              findeol(void);
 108
 109 static TAILQ_HEAD(symhead, sym)  symhead = TAILQ_HEAD_INITIALIZER(symhead);
 110 struct sym {
 111         TAILQ_ENTRY(sym)         entry;
 112         int                      used;
 113         int                      persist;
 114         char                    *nam;
 115         char                    *val;
 116 };
 117 int              symset(const char *, const char *, int);
 118 char            *symget(const char *);
 119
 120 int              atoul(char *, u_long *);
 121
 122 enum {
 123         PFCTL_STATE_NONE,
 124         PFCTL_STATE_OPTION,
 125         PFCTL_STATE_SCRUB,
 126         PFCTL_STATE_QUEUE,
 127         PFCTL_STATE_NAT,
 128         PFCTL_STATE_FILTER
 129 };
 130
 131 struct node_proto {
 132         u_int8_t                 proto;
 133         struct node_proto       *next;
 134         struct node_proto       *tail;
 135 };
 136
 137 struct node_port {
 138         u_int16_t                port[2];
 139         u_int8_t                 op;
 140         struct node_port        *next;
 141         struct node_port        *tail;
 142 };
 143
 144 struct node_uid {
 145         uid_t                    uid[2];
 146         u_int8_t                 op;
 147         struct node_uid         *next;
 148         struct node_uid         *tail;
 149 };
 150
 151 struct node_gid {
 152         gid_t                    gid[2];
 153         u_int8_t                 op;
 154         struct node_gid         *next;
 155         struct node_gid         *tail;
 156 };
 157
 158 struct node_icmp {
 159         u_int8_t                 code;
 160         u_int8_t                 type;
 161         u_int8_t                 proto;
 162         struct node_icmp        *next;
 163         struct node_icmp        *tail;
 164 };
 165
 166 enum    { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
 167             PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
 168             PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
 169             PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
 170             PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, };
 171
 172 enum    { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
 173
 174 struct node_state_opt {
 175         int                      type;
 176         union {
 177                 u_int32_t        max_states;
 178                 u_int32_t        max_src_states;
 179                 u_int32_t        max_src_conn;
 180                 struct {
 181                         u_int32_t       limit;
 182                         u_int32_t       seconds;
 183                 }                max_src_conn_rate;
 184                 struct {
 185                         u_int8_t        flush;
 186                         char            tblname[PF_TABLE_NAME_SIZE];
 187                 }                overload;
 188                 u_int32_t        max_src_nodes;
 189                 u_int8_t         src_track;
 190                 u_int32_t        statelock;
 191                 struct {
 192                         int             number;
 193                         u_int32_t       seconds;
 194                 }                timeout;
 195         }                        data;
 196         struct node_state_opt   *next;
 197         struct node_state_opt   *tail;
 198 };
 199
 200 struct peer {
 201         struct node_host        *host;
 202         struct node_port        *port;
 203 };
 204
 205 static struct node_queue {
 206         char                     queue[PF_QNAME_SIZE];
 207         char                     parent[PF_QNAME_SIZE];
 208         char                     ifname[IFNAMSIZ];
 209         int                      scheduler;
 210         struct node_queue       *next;
 211         struct node_queue       *tail;
 212 }       *queues = NULL;
 213
 214 struct node_qassign {
 215         char            *qname;
 216         char            *pqname;
 217 };
 218
 219 static struct filter_opts {
 220         int                      marker;
 221 #define FOM_FLAGS       0x01
 222 #define FOM_ICMP        0x02
 223 #define FOM_TOS         0x04
 224 #define FOM_KEEP        0x08
 225 #define FOM_SRCTRACK    0x10
 226 #define FOM_SETPRIO     0x0400
 227 #define FOM_PRIO        0x2000
 228         struct node_uid         *uid;
 229         struct node_gid         *gid;
 230         struct {
 231                 u_int8_t         b1;
 232                 u_int8_t         b2;
 233                 u_int16_t        w;
 234                 u_int16_t        w2;
 235         } flags;
 236         struct node_icmp        *icmpspec;
 237         u_int32_t                tos;
 238         u_int32_t                prob;
 239         struct {
 240                 int                      action;
 241                 struct node_state_opt   *options;
 242         } keep;
 243         int                      fragment;
 244         int                      allowopts;
 245         char                    *label[PF_RULE_MAX_LABEL_COUNT];
 246         int                      labelcount;
 247         struct node_qassign      queues;
 248         char                    *tag;
 249         char                    *match_tag;
 250         u_int8_t                 match_tag_not;
 251         u_int                    rtableid;
 252         u_int8_t                 prio;
 253         u_int8_t                 set_prio[2];
 254         struct {
 255                 struct node_host        *addr;
 256                 u_int16_t               port;
 257         }                        divert;
 258 } filter_opts;
 259
 260 static struct antispoof_opts {
 261         char                    *label[PF_RULE_MAX_LABEL_COUNT];
 262         int                      labelcount;
 263         u_int                    rtableid;
 264 } antispoof_opts;
 265
 266 static struct scrub_opts {
 267         int                      marker;
 268 #define SOM_MINTTL      0x01
 269 #define SOM_MAXMSS      0x02
 270 #define SOM_FRAGCACHE   0x04
 271 #define SOM_SETTOS      0x08
 272         int                      nodf;
 273         int                      minttl;
 274         int                      maxmss;
 275         int                      settos;
 276         int                      fragcache;
 277         int                      randomid;
 278         int                      reassemble_tcp;
 279         char                    *match_tag;
 280         u_int8_t                 match_tag_not;
 281         u_int                    rtableid;
 282 } scrub_opts;
 283
 284 static struct queue_opts {
 285         int                     marker;
 286 #define QOM_BWSPEC      0x01
 287 #define QOM_SCHEDULER   0x02
 288 #define QOM_PRIORITY    0x04
 289 #define QOM_TBRSIZE     0x08
 290 #define QOM_QLIMIT      0x10
 291         struct node_queue_bw    queue_bwspec;
 292         struct node_queue_opt   scheduler;
 293         int                     priority;
 294         unsigned int            tbrsize;
 295         int                     qlimit;
 296 } queue_opts;
 297
 298 static struct table_opts {
 299         int                     flags;
 300         int                     init_addr;
 301         struct node_tinithead   init_nodes;
 302 } table_opts;
 303
 304 static struct pool_opts {
 305         int                      marker;
 306 #define POM_TYPE                0x01
 307 #define POM_STICKYADDRESS       0x02
 308         u_int8_t                 opts;
 309         int                      type;
 310         int                      staticport;
 311         struct pf_poolhashkey   *key;
 312         struct pf_mape_portset   mape;
 313
 314 } pool_opts;
 315
 316 static struct codel_opts         codel_opts;
 317 static struct node_hfsc_opts     hfsc_opts;
 318 static struct node_fairq_opts    fairq_opts;
 319 static struct node_state_opt    *keep_state_defaults = NULL;
 320
 321 int              disallow_table(struct node_host *, const char *);
 322 int              disallow_urpf_failed(struct node_host *, const char *);
 323 int              disallow_alias(struct node_host *, const char *);
 324 int              rule_consistent(struct pfctl_rule *, int);
 325 int              filter_consistent(struct pfctl_rule *, int);
 326 int              nat_consistent(struct pfctl_rule *);
 327 int              rdr_consistent(struct pfctl_rule *);
 328 int              process_tabledef(char *, struct table_opts *);
 329 void             expand_label_str(char *, size_t, const char *, const char *);
 330 void             expand_label_if(const char *, char *, size_t, const char *);
 331 void             expand_label_addr(const char *, char *, size_t, u_int8_t,
 332                     struct node_host *);
 333 void             expand_label_port(const char *, char *, size_t,
 334                     struct node_port *);
 335 void             expand_label_proto(const char *, char *, size_t, u_int8_t);
 336 void             expand_label_nr(const char *, char *, size_t);
 337 void             expand_label(char *, size_t, const char *, u_int8_t,
 338                     struct node_host *, struct node_port *, struct node_host *,
 339                     struct node_port *, u_int8_t);
 340 void             expand_rule(struct pfctl_rule *, struct node_if *,
 341                     struct node_host *, struct node_proto *, struct node_os *,
 342                     struct node_host *, struct node_port *, struct node_host *,
 343                     struct node_port *, struct node_uid *, struct node_gid *,
 344                     struct node_icmp *, const char *);
 345 int              expand_altq(struct pf_altq *, struct node_if *,
 346                     struct node_queue *, struct node_queue_bw bwspec,
 347                     struct node_queue_opt *);
 348 int              expand_queue(struct pf_altq *, struct node_if *,
 349                     struct node_queue *, struct node_queue_bw,
 350                     struct node_queue_opt *);
 351 int              expand_skip_interface(struct node_if *);
 352
 353 int      check_rulestate(int);
 354 int      getservice(char *);
 355 int      rule_label(struct pfctl_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]);
 356 int      rt_tableid_max(void);
 357
 358 void     mv_rules(struct pfctl_ruleset *, struct pfctl_ruleset *);
 359 void     decide_address_family(struct node_host *, sa_family_t *);
 360 void     remove_invalid_hosts(struct node_host **, sa_family_t *);
 361 int      invalid_redirect(struct node_host *, sa_family_t);
 362 u_int16_t parseicmpspec(char *, sa_family_t);
 363 int      kw_casecmp(const void *, const void *);
 364 int      map_tos(char *string, int *);
 365
 366 static TAILQ_HEAD(loadanchorshead, loadanchors)
 367     loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
 368
 369 struct loadanchors {
 370         TAILQ_ENTRY(loadanchors)         entries;
 371         char                            *anchorname;
 372         char                            *filename;
 373 };
 374
 375 typedef struct {
 376         union {
 377                 int64_t                  number;
 378                 double                   probability;
 379                 int                      i;
 380                 char                    *string;
 381                 u_int                    rtableid;
 382                 struct {
 383                         u_int8_t         b1;
 384                         u_int8_t         b2;
 385                         u_int16_t        w;
 386                         u_int16_t        w2;
 387                 }                        b;
 388                 struct range {
 389                         int              a;
 390                         int              b;
 391                         int              t;
 392                 }                        range;
 393                 struct node_if          *interface;
 394                 struct node_proto       *proto;
 395                 struct node_icmp        *icmp;
 396                 struct node_host        *host;
 397                 struct node_os          *os;
 398                 struct node_port        *port;
 399                 struct node_uid         *uid;
 400                 struct node_gid         *gid;
 401                 struct node_state_opt   *state_opt;
 402                 struct peer              peer;
 403                 struct {
 404                         struct peer      src, dst;
 405                         struct node_os  *src_os;
 406                 }                        fromto;
 407                 struct {
 408                         struct node_host        *host;
 409                         u_int8_t                 rt;
 410                         u_int8_t                 pool_opts;
 411                         sa_family_t              af;
 412                         struct pf_poolhashkey   *key;
 413                 }                        route;
 414                 struct redirection {
 415                         struct node_host        *host;
 416                         struct range             rport;
 417                 }                       *redirection;
 418                 struct {
 419                         int                      action;
 420                         struct node_state_opt   *options;
 421                 }                        keep_state;
 422                 struct {
 423                         u_int8_t         log;
 424                         u_int8_t         logif;
 425                         u_int8_t         quick;
 426                 }                        logquick;
 427                 struct {
 428                         int              neg;
 429                         char            *name;
 430                 }                        tagged;
 431                 struct pf_poolhashkey   *hashkey;
 432                 struct node_queue       *queue;
 433                 struct node_queue_opt    queue_options;
 434                 struct node_queue_bw     queue_bwspec;
 435                 struct node_qassign      qassign;
 436                 struct filter_opts       filter_opts;
 437                 struct antispoof_opts    antispoof_opts;
 438                 struct queue_opts        queue_opts;
 439                 struct scrub_opts        scrub_opts;
 440                 struct table_opts        table_opts;
 441                 struct pool_opts         pool_opts;
 442                 struct node_hfsc_opts    hfsc_opts;
 443                 struct node_fairq_opts   fairq_opts;
 444                 struct codel_opts        codel_opts;
 445         } v;
 446         int lineno;
 447 } YYSTYPE;
 448
 449 #define PPORT_RANGE     1
 450 #define PPORT_STAR      2
 451 int     parseport(char *, struct range *r, int);
 452
 453 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
 454         (!((addr).iflags & PFI_AFLAG_NOALIAS) ||                 \
 455         !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
 456
 457 %}
 458
 459 %token  PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
 460 %token  RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
 461 %token  ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
 462 %token  MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
 463 %token  NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
 464 %token  REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
 465 %token  SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY
 466 %token  RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
 467 %token  ANTISPOOF FOR INCLUDE KEEPCOUNTERS
 468 %token  BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET
 469 %token  ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME
 470 %token  UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL
 471 %token  LOAD RULESET_OPTIMIZATION PRIO
 472 %token  STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
 473 %token  MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY
 474 %token  TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
 475 %token  DIVERTTO DIVERTREPLY
 476 %token  <v.string>              STRING
 477 %token  <v.number>              NUMBER
 478 %token  <v.i>                   PORTBINARY
 479 %type   <v.interface>           interface if_list if_item_not if_item
 480 %type   <v.number>              number icmptype icmp6type uid gid
 481 %type   <v.number>              tos not yesno
 482 %type   <v.probability>         probability
 483 %type   <v.i>                   no dir af fragcache optimizer
 484 %type   <v.i>                   sourcetrack flush unaryop statelock
 485 %type   <v.b>                   action nataction natpasslog scrubaction
 486 %type   <v.b>                   flags flag blockspec prio
 487 %type   <v.range>               portplain portstar portrange
 488 %type   <v.hashkey>             hashkey
 489 %type   <v.proto>               proto proto_list proto_item
 490 %type   <v.number>              protoval
 491 %type   <v.icmp>                icmpspec
 492 %type   <v.icmp>                icmp_list icmp_item
 493 %type   <v.icmp>                icmp6_list icmp6_item
 494 %type   <v.number>              reticmpspec reticmp6spec
 495 %type   <v.fromto>              fromto
 496 %type   <v.peer>                ipportspec from to
 497 %type   <v.host>                ipspec toipspec xhost host dynaddr host_list
 498 %type   <v.host>                redir_host_list redirspec
 499 %type   <v.host>                route_host route_host_list routespec
 500 %type   <v.os>                  os xos os_list
 501 %type   <v.port>                portspec port_list port_item
 502 %type   <v.uid>                 uids uid_list uid_item
 503 %type   <v.gid>                 gids gid_list gid_item
 504 %type   <v.route>               route
 505 %type   <v.redirection>         redirection redirpool
 506 %type   <v.string>              label stringall tag anchorname
 507 %type   <v.string>              string varstring numberstring
 508 %type   <v.keep_state>          keep
 509 %type   <v.state_opt>           state_opt_spec state_opt_list state_opt_item
 510 %type   <v.logquick>            logquick quick log logopts logopt
 511 %type   <v.interface>           antispoof_ifspc antispoof_iflst antispoof_if
 512 %type   <v.qassign>             qname
 513 %type   <v.queue>               qassign qassign_list qassign_item
 514 %type   <v.queue_options>       scheduler
 515 %type   <v.number>              cbqflags_list cbqflags_item
 516 %type   <v.number>              priqflags_list priqflags_item
 517 %type   <v.hfsc_opts>           hfscopts_list hfscopts_item hfsc_opts
 518 %type   <v.fairq_opts>          fairqopts_list fairqopts_item fairq_opts
 519 %type   <v.codel_opts>          codelopts_list codelopts_item codel_opts
 520 %type   <v.queue_bwspec>        bandwidth
 521 %type   <v.filter_opts>         filter_opts filter_opt filter_opts_l
 522 %type   <v.filter_opts>         filter_sets filter_set filter_sets_l
 523 %type   <v.antispoof_opts>      antispoof_opts antispoof_opt antispoof_opts_l
 524 %type   <v.queue_opts>          queue_opts queue_opt queue_opts_l
 525 %type   <v.scrub_opts>          scrub_opts scrub_opt scrub_opts_l
 526 %type   <v.table_opts>          table_opts table_opt table_opts_l
 527 %type   <v.pool_opts>           pool_opts pool_opt pool_opts_l
 528 %type   <v.tagged>              tagged
 529 %type   <v.rtableid>            rtable
 530 %%
 531
 532 ruleset         : /* empty */
 533                 | ruleset include '\n'
 534                 | ruleset '\n'
 535                 | ruleset option '\n'
 536                 | ruleset scrubrule '\n'
 537                 | ruleset natrule '\n'
 538                 | ruleset binatrule '\n'
 539                 | ruleset pfrule '\n'
 540                 | ruleset anchorrule '\n'
 541                 | ruleset loadrule '\n'
 542                 | ruleset altqif '\n'
 543                 | ruleset queuespec '\n'
 544                 | ruleset varset '\n'
 545                 | ruleset antispoof '\n'
 546                 | ruleset tabledef '\n'
 547                 | '{' fakeanchor '}' '\n';
 548                 | ruleset error '\n'            { file->errors++; }
 549                 ;
 550
 551 include         : INCLUDE STRING                {
 552                         struct file     *nfile;
 553
 554                         if ((nfile = pushfile($2, 0)) == NULL) {
 555                                 yyerror("failed to include file %s", $2);
 556                                 free($2);
 557                                 YYERROR;
 558                         }
 559                         free($2);
 560
 561                         file = nfile;
 562                         lungetc('\n');
 563                 }
 564                 ;
 565
 566 /*
 567  * apply to previouslys specified rule: must be careful to note
 568  * what that is: pf or nat or binat or rdr
 569  */
 570 fakeanchor      : fakeanchor '\n'
 571                 | fakeanchor anchorrule '\n'
 572                 | fakeanchor binatrule '\n'
 573                 | fakeanchor natrule '\n'
 574                 | fakeanchor pfrule '\n'
 575                 | fakeanchor error '\n'
 576                 ;
 577
 578 optimizer       : string        {
 579                         if (!strcmp($1, "none"))
 580                                 $$ = 0;
 581                         else if (!strcmp($1, "basic"))
 582                                 $$ = PF_OPTIMIZE_BASIC;
 583                         else if (!strcmp($1, "profile"))
 584                                 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
 585                         else {
 586                                 yyerror("unknown ruleset-optimization %s", $1);
 587                                 YYERROR;
 588                         }
 589                 }
 590                 ;
 591
 592 option          : SET OPTIMIZATION STRING               {
 593                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 594                                 free($3);
 595                                 YYERROR;
 596                         }
 597                         if (pfctl_set_optimization(pf, $3) != 0) {
 598                                 yyerror("unknown optimization %s", $3);
 599                                 free($3);
 600                                 YYERROR;
 601                         }
 602                         free($3);
 603                 }
 604                 | SET RULESET_OPTIMIZATION optimizer {
 605                         if (!(pf->opts & PF_OPT_OPTIMIZE)) {
 606                                 pf->opts |= PF_OPT_OPTIMIZE;
 607                                 pf->optimize = $3;
 608                         }
 609                 }
 610                 | SET TIMEOUT timeout_spec
 611                 | SET TIMEOUT '{' optnl timeout_list '}'
 612                 | SET LIMIT limit_spec
 613                 | SET LIMIT '{' optnl limit_list '}'
 614                 | SET LOGINTERFACE stringall            {
 615                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 616                                 free($3);
 617                                 YYERROR;
 618                         }
 619                         if (pfctl_set_logif(pf, $3) != 0) {
 620                                 yyerror("error setting loginterface %s", $3);
 621                                 free($3);
 622                                 YYERROR;
 623                         }
 624                         free($3);
 625                 }
 626                 | SET HOSTID number {
 627                         if ($3 == 0 || $3 > UINT_MAX) {
 628                                 yyerror("hostid must be non-zero");
 629                                 YYERROR;
 630                         }
 631                         if (pfctl_set_hostid(pf, $3) != 0) {
 632                                 yyerror("error setting hostid %08x", $3);
 633                                 YYERROR;
 634                         }
 635                 }
 636                 | SET BLOCKPOLICY DROP  {
 637                         if (pf->opts & PF_OPT_VERBOSE)
 638                                 printf("set block-policy drop\n");
 639                         if (check_rulestate(PFCTL_STATE_OPTION))
 640                                 YYERROR;
 641                         blockpolicy = PFRULE_DROP;
 642                 }
 643                 | SET BLOCKPOLICY RETURN {
 644                         if (pf->opts & PF_OPT_VERBOSE)
 645                                 printf("set block-policy return\n");
 646                         if (check_rulestate(PFCTL_STATE_OPTION))
 647                                 YYERROR;
 648                         blockpolicy = PFRULE_RETURN;
 649                 }
 650                 | SET FAILPOLICY DROP   {
 651                         if (pf->opts & PF_OPT_VERBOSE)
 652                                 printf("set fail-policy drop\n");
 653                         if (check_rulestate(PFCTL_STATE_OPTION))
 654                                 YYERROR;
 655                         failpolicy = PFRULE_DROP;
 656                 }
 657                 | SET FAILPOLICY RETURN {
 658                         if (pf->opts & PF_OPT_VERBOSE)
 659                                 printf("set fail-policy return\n");
 660                         if (check_rulestate(PFCTL_STATE_OPTION))
 661                                 YYERROR;
 662                         failpolicy = PFRULE_RETURN;
 663                 }
 664                 | SET REQUIREORDER yesno {
 665                         if (pf->opts & PF_OPT_VERBOSE)
 666                                 printf("set require-order %s\n",
 667                                     $3 == 1 ? "yes" : "no");
 668                         require_order = $3;
 669                 }
 670                 | SET FINGERPRINTS STRING {
 671                         if (pf->opts & PF_OPT_VERBOSE)
 672                                 printf("set fingerprints \"%s\"\n", $3);
 673                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 674                                 free($3);
 675                                 YYERROR;
 676                         }
 677                         if (!pf->anchor->name[0]) {
 678                                 if (pfctl_file_fingerprints(pf->dev,
 679                                     pf->opts, $3)) {
 680                                         yyerror("error loading "
 681                                             "fingerprints %s", $3);
 682                                         free($3);
 683                                         YYERROR;
 684                                 }
 685                         }
 686                         free($3);
 687                 }
 688                 | SET STATEPOLICY statelock {
 689                         if (pf->opts & PF_OPT_VERBOSE)
 690                                 switch ($3) {
 691                                 case 0:
 692                                         printf("set state-policy floating\n");
 693                                         break;
 694                                 case PFRULE_IFBOUND:
 695                                         printf("set state-policy if-bound\n");
 696                                         break;
 697                                 }
 698                         default_statelock = $3;
 699                 }
 700                 | SET DEBUG STRING {
 701                         if (check_rulestate(PFCTL_STATE_OPTION)) {
 702                                 free($3);
 703                                 YYERROR;
 704                         }
 705                         if (pfctl_set_debug(pf, $3) != 0) {
 706                                 yyerror("error setting debuglevel %s", $3);
 707                                 free($3);
 708                                 YYERROR;
 709                         }
 710                         free($3);
 711                 }
 712                 | SET SKIP interface {
 713                         if (expand_skip_interface($3) != 0) {
 714                                 yyerror("error setting skip interface(s)");
 715                                 YYERROR;
 716                         }
 717                 }
 718                 | SET STATEDEFAULTS state_opt_list {
 719                         if (keep_state_defaults != NULL) {
 720                                 yyerror("cannot redefine state-defaults");
 721                                 YYERROR;
 722                         }
 723                         keep_state_defaults = $3;
 724                 }
 725                 | SET KEEPCOUNTERS {
 726                         pf->keep_counters = true;
 727                 }
 728                 ;
 729
 730 stringall       : STRING        { $$ = $1; }
 731                 | ALL           {
 732                         if (($$ = strdup("all")) == NULL) {
 733                                 err(1, "stringall: strdup");
 734                         }
 735                 }
 736                 ;
 737
 738 string          : STRING string                         {
 739                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 740                                 err(1, "string: asprintf");
 741                         free($1);
 742                         free($2);
 743                 }
 744                 | STRING
 745                 ;
 746
 747 varstring       : numberstring varstring                {
 748                         if (asprintf(&$$, "%s %s", $1, $2) == -1)
 749                                 err(1, "string: asprintf");
 750                         free($1);
 751                         free($2);
 752                 }
 753                 | numberstring
 754                 ;
 755
 756 numberstring    : NUMBER                                {
 757                         char    *s;
 758                         if (asprintf(&s, "%lld", (long long)$1) == -1) {
 759                                 yyerror("string: asprintf");
 760                                 YYERROR;
 761                         }
 762                         $$ = s;
 763                 }
 764                 | STRING
 765                 ;
 766
 767 varset          : STRING '=' varstring  {
 768                         char *s = $1;
 769                         if (pf->opts & PF_OPT_VERBOSE)
 770                                 printf("%s = \"%s\"\n", $1, $3);
 771                         while (*s++) {
 772                                 if (isspace((unsigned char)*s)) {
 773                                         yyerror("macro name cannot contain "
 774                                            "whitespace");
 775                                         YYERROR;
 776                                 }
 777                         }
 778                         if (symset($1, $3, 0) == -1)
 779                                 err(1, "cannot store variable %s", $1);
 780                         free($1);
 781                         free($3);
 782                 }
 783                 ;
 784
 785 anchorname      : STRING                        { $$ = $1; }
 786                 | /* empty */                   { $$ = NULL; }
 787                 ;
 788
 789 pfa_anchorlist  : /* empty */
 790                 | pfa_anchorlist '\n'
 791                 | pfa_anchorlist pfrule '\n'
 792                 | pfa_anchorlist anchorrule '\n'
 793                 ;
 794
 795 pfa_anchor      : '{'
 796                 {
 797                         char ta[PF_ANCHOR_NAME_SIZE];
 798                         struct pfctl_ruleset *rs;
 799
 800                         /* steping into a brace anchor */
 801                         pf->asd++;
 802                         pf->bn++;
 803                         pf->brace = 1;
 804
 805                         /* create a holding ruleset in the root */
 806                         snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
 807                         rs = pf_find_or_create_ruleset(ta);
 808                         if (rs == NULL)
 809                                 err(1, "pfa_anchor: pf_find_or_create_ruleset");
 810                         pf->astack[pf->asd] = rs->anchor;
 811                         pf->anchor = rs->anchor;
 812                 } '\n' pfa_anchorlist '}'
 813                 {
 814                         pf->alast = pf->anchor;
 815                         pf->asd--;
 816                         pf->anchor = pf->astack[pf->asd];
 817                 }
 818                 | /* empty */
 819                 ;
 820
 821 anchorrule      : ANCHOR anchorname dir quick interface af proto fromto
 822                     filter_opts pfa_anchor
 823                 {
 824                         struct pfctl_rule       r;
 825                         struct node_proto       *proto;
 826
 827                         if (check_rulestate(PFCTL_STATE_FILTER)) {
 828                                 if ($2)
 829                                         free($2);
 830                                 YYERROR;
 831                         }
 832
 833                         if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
 834                                 free($2);
 835                                 yyerror("anchor names beginning with '_' "
 836                                     "are reserved for internal use");
 837                                 YYERROR;
 838                         }
 839
 840                         memset(&r, 0, sizeof(r));
 841                         if (pf->astack[pf->asd + 1]) {
 842                                 /* move inline rules into relative location */
 843                                 pfctl_anchor_setup(&r,
 844                                     &pf->astack[pf->asd]->ruleset,
 845                                     $2 ? $2 : pf->alast->name);
 846
 847                                 if (r.anchor == NULL)
 848                                         err(1, "anchorrule: unable to "
 849                                             "create ruleset");
 850
 851                                 if (pf->alast != r.anchor) {
 852                                         if (r.anchor->match) {
 853                                                 yyerror("inline anchor '%s' "
 854                                                     "already exists",
 855                                                     r.anchor->name);
 856                                                 YYERROR;
 857                                         }
 858                                         mv_rules(&pf->alast->ruleset,
 859                                             &r.anchor->ruleset);
 860                                 }
 861                                 pf_remove_if_empty_ruleset(&pf->alast->ruleset);
 862                                 pf->alast = r.anchor;
 863                         } else {
 864                                 if (!$2) {
 865                                         yyerror("anchors without explicit "
 866                                             "rules must specify a name");
 867                                         YYERROR;
 868                                 }
 869                         }
 870                         r.direction = $3;
 871                         r.quick = $4.quick;
 872                         r.af = $6;
 873                         r.prob = $9.prob;
 874                         r.rtableid = $9.rtableid;
 875
 876                         if ($9.tag)
 877                                 if (strlcpy(r.tagname, $9.tag,
 878                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 879                                         yyerror("tag too long, max %u chars",
 880                                             PF_TAG_NAME_SIZE - 1);
 881                                         YYERROR;
 882                                 }
 883                         if ($9.match_tag)
 884                                 if (strlcpy(r.match_tagname, $9.match_tag,
 885                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 886                                         yyerror("tag too long, max %u chars",
 887                                             PF_TAG_NAME_SIZE - 1);
 888                                         YYERROR;
 889                                 }
 890                         r.match_tag_not = $9.match_tag_not;
 891                         if (rule_label(&r, $9.label))
 892                                 YYERROR;
 893                         for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
 894                                 free($9.label[i]);
 895                         r.flags = $9.flags.b1;
 896                         r.flagset = $9.flags.b2;
 897                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
 898                                 yyerror("flags always false");
 899                                 YYERROR;
 900                         }
 901                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
 902                                 for (proto = $7; proto != NULL &&
 903                                     proto->proto != IPPROTO_TCP;
 904                                     proto = proto->next)
 905                                         ;       /* nothing */
 906                                 if (proto == NULL && $7 != NULL) {
 907                                         if ($9.flags.b1 || $9.flags.b2)
 908                                                 yyerror(
 909                                                     "flags only apply to tcp");
 910                                         if ($8.src_os)
 911                                                 yyerror(
 912                                                     "OS fingerprinting only "
 913                                                     "applies to tcp");
 914                                         YYERROR;
 915                                 }
 916                         }
 917
 918                         r.tos = $9.tos;
 919
 920                         if ($9.keep.action) {
 921                                 yyerror("cannot specify state handling "
 922                                     "on anchors");
 923                                 YYERROR;
 924                         }
 925
 926                         if ($9.match_tag)
 927                                 if (strlcpy(r.match_tagname, $9.match_tag,
 928                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
 929                                         yyerror("tag too long, max %u chars",
 930                                             PF_TAG_NAME_SIZE - 1);
 931                                         YYERROR;
 932                                 }
 933                         r.match_tag_not = $9.match_tag_not;
 934                         if ($9.marker & FOM_PRIO) {
 935                                 if ($9.prio == 0)
 936                                         r.prio = PF_PRIO_ZERO;
 937                                 else
 938                                         r.prio = $9.prio;
 939                         }
 940                         if ($9.marker & FOM_SETPRIO) {
 941                                 r.set_prio[0] = $9.set_prio[0];
 942                                 r.set_prio[1] = $9.set_prio[1];
 943                                 r.scrub_flags |= PFSTATE_SETPRIO;
 944                         }
 945
 946                         decide_address_family($8.src.host, &r.af);
 947                         decide_address_family($8.dst.host, &r.af);
 948
 949                         expand_rule(&r, $5, NULL, $7, $8.src_os,
 950                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
 951                             $9.uid, $9.gid, $9.icmpspec,
 952                             pf->astack[pf->asd + 1] ? pf->alast->name : $2);
 953                         free($2);
 954                         pf->astack[pf->asd + 1] = NULL;
 955                 }
 956                 | NATANCHOR string interface af proto fromto rtable {
 957                         struct pfctl_rule       r;
 958
 959                         if (check_rulestate(PFCTL_STATE_NAT)) {
 960                                 free($2);
 961                                 YYERROR;
 962                         }
 963
 964                         memset(&r, 0, sizeof(r));
 965                         r.action = PF_NAT;
 966                         r.af = $4;
 967                         r.rtableid = $7;
 968
 969                         decide_address_family($6.src.host, &r.af);
 970                         decide_address_family($6.dst.host, &r.af);
 971
 972                         expand_rule(&r, $3, NULL, $5, $6.src_os,
 973                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
 974                             0, 0, 0, $2);
 975                         free($2);
 976                 }
 977                 | RDRANCHOR string interface af proto fromto rtable {
 978                         struct pfctl_rule       r;
 979
 980                         if (check_rulestate(PFCTL_STATE_NAT)) {
 981                                 free($2);
 982                                 YYERROR;
 983                         }
 984
 985                         memset(&r, 0, sizeof(r));
 986                         r.action = PF_RDR;
 987                         r.af = $4;
 988                         r.rtableid = $7;
 989
 990                         decide_address_family($6.src.host, &r.af);
 991                         decide_address_family($6.dst.host, &r.af);
 992
 993                         if ($6.src.port != NULL) {
 994                                 yyerror("source port parameter not supported"
 995                                     " in rdr-anchor");
 996                                 YYERROR;
 997                         }
 998                         if ($6.dst.port != NULL) {
 999                                 if ($6.dst.port->next != NULL) {
1000                                         yyerror("destination port list "
1001                                             "expansion not supported in "
1002                                             "rdr-anchor");
1003                                         YYERROR;
1004                                 } else if ($6.dst.port->op != PF_OP_EQ) {
1005                                         yyerror("destination port operators"
1006                                             " not supported in rdr-anchor");
1007                                         YYERROR;
1008                                 }
1009                                 r.dst.port[0] = $6.dst.port->port[0];
1010                                 r.dst.port[1] = $6.dst.port->port[1];
1011                                 r.dst.port_op = $6.dst.port->op;
1012                         }
1013
1014                         expand_rule(&r, $3, NULL, $5, $6.src_os,
1015                             $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
1016                             0, 0, 0, $2);
1017                         free($2);
1018                 }
1019                 | BINATANCHOR string interface af proto fromto rtable {
1020                         struct pfctl_rule       r;
1021
1022                         if (check_rulestate(PFCTL_STATE_NAT)) {
1023                                 free($2);
1024                                 YYERROR;
1025                         }
1026
1027                         memset(&r, 0, sizeof(r));
1028                         r.action = PF_BINAT;
1029                         r.af = $4;
1030                         r.rtableid = $7;
1031                         if ($5 != NULL) {
1032                                 if ($5->next != NULL) {
1033                                         yyerror("proto list expansion"
1034                                             " not supported in binat-anchor");
1035                                         YYERROR;
1036                                 }
1037                                 r.proto = $5->proto;
1038                                 free($5);
1039                         }
1040
1041                         if ($6.src.host != NULL || $6.src.port != NULL ||
1042                             $6.dst.host != NULL || $6.dst.port != NULL) {
1043                                 yyerror("fromto parameter not supported"
1044                                     " in binat-anchor");
1045                                 YYERROR;
1046                         }
1047
1048                         decide_address_family($6.src.host, &r.af);
1049                         decide_address_family($6.dst.host, &r.af);
1050
1051                         pfctl_append_rule(pf, &r, $2);
1052                         free($2);
1053                 }
1054                 ;
1055
1056 loadrule        : LOAD ANCHOR string FROM string        {
1057                         struct loadanchors      *loadanchor;
1058
1059                         if (strlen(pf->anchor->name) + 1 +
1060                             strlen($3) >= MAXPATHLEN) {
1061                                 yyerror("anchorname %s too long, max %u\n",
1062                                     $3, MAXPATHLEN - 1);
1063                                 free($3);
1064                                 YYERROR;
1065                         }
1066                         loadanchor = calloc(1, sizeof(struct loadanchors));
1067                         if (loadanchor == NULL)
1068                                 err(1, "loadrule: calloc");
1069                         if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1070                             NULL)
1071                                 err(1, "loadrule: malloc");
1072                         if (pf->anchor->name[0])
1073                                 snprintf(loadanchor->anchorname, MAXPATHLEN,
1074                                     "%s/%s", pf->anchor->name, $3);
1075                         else
1076                                 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1077                         if ((loadanchor->filename = strdup($5)) == NULL)
1078                                 err(1, "loadrule: strdup");
1079
1080                         TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1081                             entries);
1082
1083                         free($3);
1084                         free($5);
1085                 };
1086
1087 scrubaction     : no SCRUB {
1088                         $$.b2 = $$.w = 0;
1089                         if ($1)
1090                                 $$.b1 = PF_NOSCRUB;
1091                         else
1092                                 $$.b1 = PF_SCRUB;
1093                 }
1094                 ;
1095
1096 scrubrule       : scrubaction dir logquick interface af proto fromto scrub_opts
1097                 {
1098                         struct pfctl_rule       r;
1099
1100                         if (check_rulestate(PFCTL_STATE_SCRUB))
1101                                 YYERROR;
1102
1103                         memset(&r, 0, sizeof(r));
1104
1105                         r.action = $1.b1;
1106                         r.direction = $2;
1107
1108                         r.log = $3.log;
1109                         r.logif = $3.logif;
1110                         if ($3.quick) {
1111                                 yyerror("scrub rules do not support 'quick'");
1112                                 YYERROR;
1113                         }
1114
1115                         r.af = $5;
1116                         if ($8.nodf)
1117                                 r.rule_flag |= PFRULE_NODF;
1118                         if ($8.randomid)
1119                                 r.rule_flag |= PFRULE_RANDOMID;
1120                         if ($8.reassemble_tcp) {
1121                                 if (r.direction != PF_INOUT) {
1122                                         yyerror("reassemble tcp rules can not "
1123                                             "specify direction");
1124                                         YYERROR;
1125                                 }
1126                                 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1127                         }
1128                         if ($8.minttl)
1129                                 r.min_ttl = $8.minttl;
1130                         if ($8.maxmss)
1131                                 r.max_mss = $8.maxmss;
1132                         if ($8.marker & SOM_SETTOS) {
1133                                 r.rule_flag |= PFRULE_SET_TOS;
1134                                 r.set_tos = $8.settos;
1135                         }
1136                         if ($8.fragcache)
1137                                 r.rule_flag |= $8.fragcache;
1138                         if ($8.match_tag)
1139                                 if (strlcpy(r.match_tagname, $8.match_tag,
1140                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1141                                         yyerror("tag too long, max %u chars",
1142                                             PF_TAG_NAME_SIZE - 1);
1143                                         YYERROR;
1144                                 }
1145                         r.match_tag_not = $8.match_tag_not;
1146                         r.rtableid = $8.rtableid;
1147
1148                         expand_rule(&r, $4, NULL, $6, $7.src_os,
1149                             $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
1150                             NULL, NULL, NULL, "");
1151                 }
1152                 ;
1153
1154 scrub_opts      :       {
1155                                 bzero(&scrub_opts, sizeof scrub_opts);
1156                                 scrub_opts.rtableid = -1;
1157                         }
1158                     scrub_opts_l
1159                         { $$ = scrub_opts; }
1160                 | /* empty */ {
1161                         bzero(&scrub_opts, sizeof scrub_opts);
1162                         scrub_opts.rtableid = -1;
1163                         $$ = scrub_opts;
1164                 }
1165                 ;
1166
1167 scrub_opts_l    : scrub_opts_l scrub_opt
1168                 | scrub_opt
1169                 ;
1170
1171 scrub_opt       : NODF  {
1172                         if (scrub_opts.nodf) {
1173                                 yyerror("no-df cannot be respecified");
1174                                 YYERROR;
1175                         }
1176                         scrub_opts.nodf = 1;
1177                 }
1178                 | MINTTL NUMBER {
1179                         if (scrub_opts.marker & SOM_MINTTL) {
1180                                 yyerror("min-ttl cannot be respecified");
1181                                 YYERROR;
1182                         }
1183                         if ($2 < 0 || $2 > 255) {
1184                                 yyerror("illegal min-ttl value %d", $2);
1185                                 YYERROR;
1186                         }
1187                         scrub_opts.marker |= SOM_MINTTL;
1188                         scrub_opts.minttl = $2;
1189                 }
1190                 | MAXMSS NUMBER {
1191                         if (scrub_opts.marker & SOM_MAXMSS) {
1192                                 yyerror("max-mss cannot be respecified");
1193                                 YYERROR;
1194                         }
1195                         if ($2 < 0 || $2 > 65535) {
1196                                 yyerror("illegal max-mss value %d", $2);
1197                                 YYERROR;
1198                         }
1199                         scrub_opts.marker |= SOM_MAXMSS;
1200                         scrub_opts.maxmss = $2;
1201                 }
1202                 | SETTOS tos {
1203                         if (scrub_opts.marker & SOM_SETTOS) {
1204                                 yyerror("set-tos cannot be respecified");
1205                                 YYERROR;
1206                         }
1207                         scrub_opts.marker |= SOM_SETTOS;
1208                         scrub_opts.settos = $2;
1209                 }
1210                 | fragcache {
1211                         if (scrub_opts.marker & SOM_FRAGCACHE) {
1212                                 yyerror("fragcache cannot be respecified");
1213                                 YYERROR;
1214                         }
1215                         scrub_opts.marker |= SOM_FRAGCACHE;
1216                         scrub_opts.fragcache = $1;
1217                 }
1218                 | REASSEMBLE STRING {
1219                         if (strcasecmp($2, "tcp") != 0) {
1220                                 yyerror("scrub reassemble supports only tcp, "
1221                                     "not '%s'", $2);
1222                                 free($2);
1223                                 YYERROR;
1224                         }
1225                         free($2);
1226                         if (scrub_opts.reassemble_tcp) {
1227                                 yyerror("reassemble tcp cannot be respecified");
1228                                 YYERROR;
1229                         }
1230                         scrub_opts.reassemble_tcp = 1;
1231                 }
1232                 | RANDOMID {
1233                         if (scrub_opts.randomid) {
1234                                 yyerror("random-id cannot be respecified");
1235                                 YYERROR;
1236                         }
1237                         scrub_opts.randomid = 1;
1238                 }
1239                 | RTABLE NUMBER                         {
1240                         if ($2 < 0 || $2 > rt_tableid_max()) {
1241                                 yyerror("invalid rtable id");
1242                                 YYERROR;
1243                         }
1244                         scrub_opts.rtableid = $2;
1245                 }
1246                 | not TAGGED string                     {
1247                         scrub_opts.match_tag = $3;
1248                         scrub_opts.match_tag_not = $1;
1249                 }
1250                 ;
1251
1252 fragcache       : FRAGMENT REASSEMBLE   { $$ = 0; /* default */ }
1253                 | FRAGMENT FRAGCROP     { $$ = 0; }
1254                 | FRAGMENT FRAGDROP     { $$ = 0; }
1255                 ;
1256
1257 antispoof       : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1258                         struct pfctl_rule        r;
1259                         struct node_host        *h = NULL, *hh;
1260                         struct node_if          *i, *j;
1261
1262                         if (check_rulestate(PFCTL_STATE_FILTER))
1263                                 YYERROR;
1264
1265                         for (i = $3; i; i = i->next) {
1266                                 bzero(&r, sizeof(r));
1267
1268                                 r.action = PF_DROP;
1269                                 r.direction = PF_IN;
1270                                 r.log = $2.log;
1271                                 r.logif = $2.logif;
1272                                 r.quick = $2.quick;
1273                                 r.af = $4;
1274                                 if (rule_label(&r, $5.label))
1275                                         YYERROR;
1276                                 r.rtableid = $5.rtableid;
1277                                 j = calloc(1, sizeof(struct node_if));
1278                                 if (j == NULL)
1279                                         err(1, "antispoof: calloc");
1280                                 if (strlcpy(j->ifname, i->ifname,
1281                                     sizeof(j->ifname)) >= sizeof(j->ifname)) {
1282                                         free(j);
1283                                         yyerror("interface name too long");
1284                                         YYERROR;
1285                                 }
1286                                 j->not = 1;
1287                                 if (i->dynamic) {
1288                                         h = calloc(1, sizeof(*h));
1289                                         if (h == NULL)
1290                                                 err(1, "address: calloc");
1291                                         h->addr.type = PF_ADDR_DYNIFTL;
1292                                         set_ipmask(h, 128);
1293                                         if (strlcpy(h->addr.v.ifname, i->ifname,
1294                                             sizeof(h->addr.v.ifname)) >=
1295                                             sizeof(h->addr.v.ifname)) {
1296                                                 free(h);
1297                                                 yyerror(
1298                                                     "interface name too long");
1299                                                 YYERROR;
1300                                         }
1301                                         hh = malloc(sizeof(*hh));
1302                                         if (hh == NULL)
1303                                                  err(1, "address: malloc");
1304                                         bcopy(h, hh, sizeof(*hh));
1305                                         h->addr.iflags = PFI_AFLAG_NETWORK;
1306                                 } else {
1307                                         h = ifa_lookup(j->ifname,
1308                                             PFI_AFLAG_NETWORK);
1309                                         hh = NULL;
1310                                 }
1311
1312                                 if (h != NULL)
1313                                         expand_rule(&r, j, NULL, NULL, NULL, h,
1314                                             NULL, NULL, NULL, NULL, NULL,
1315                                             NULL, "");
1316
1317                                 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1318                                         bzero(&r, sizeof(r));
1319
1320                                         r.action = PF_DROP;
1321                                         r.direction = PF_IN;
1322                                         r.log = $2.log;
1323                                         r.logif = $2.logif;
1324                                         r.quick = $2.quick;
1325                                         r.af = $4;
1326                                         if (rule_label(&r, $5.label))
1327                                                 YYERROR;
1328                                         r.rtableid = $5.rtableid;
1329                                         if (hh != NULL)
1330                                                 h = hh;
1331                                         else
1332                                                 h = ifa_lookup(i->ifname, 0);
1333                                         if (h != NULL)
1334                                                 expand_rule(&r, NULL, NULL,
1335                                                     NULL, NULL, h, NULL, NULL,
1336                                                     NULL, NULL, NULL, NULL, "");
1337                                 } else
1338                                         free(hh);
1339                         }
1340                         for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
1341                                 free($5.label[i]);
1342                 }
1343                 ;
1344
1345 antispoof_ifspc : FOR antispoof_if                      { $$ = $2; }
1346                 | FOR '{' optnl antispoof_iflst '}'     { $$ = $4; }
1347                 ;
1348
1349 antispoof_iflst : antispoof_if optnl                    { $$ = $1; }
1350                 | antispoof_iflst comma antispoof_if optnl {
1351                         $1->tail->next = $3;
1352                         $1->tail = $3;
1353                         $$ = $1;
1354                 }
1355                 ;
1356
1357 antispoof_if    : if_item                               { $$ = $1; }
1358                 | '(' if_item ')'                       {
1359                         $2->dynamic = 1;
1360                         $$ = $2;
1361                 }
1362                 ;
1363
1364 antispoof_opts  :       {
1365                                 bzero(&antispoof_opts, sizeof antispoof_opts);
1366                                 antispoof_opts.rtableid = -1;
1367                         }
1368                     antispoof_opts_l
1369                         { $$ = antispoof_opts; }
1370                 | /* empty */   {
1371                         bzero(&antispoof_opts, sizeof antispoof_opts);
1372                         antispoof_opts.rtableid = -1;
1373                         $$ = antispoof_opts;
1374                 }
1375                 ;
1376
1377 antispoof_opts_l        : antispoof_opts_l antispoof_opt
1378                         | antispoof_opt
1379                         ;
1380
1381 antispoof_opt   : label {
1382                         if (antispoof_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
1383                                 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
1384                                 YYERROR;
1385                         }
1386                         antispoof_opts.label[antispoof_opts.labelcount++] = $1;
1387                 }
1388                 | RTABLE NUMBER                         {
1389                         if ($2 < 0 || $2 > rt_tableid_max()) {
1390                                 yyerror("invalid rtable id");
1391                                 YYERROR;
1392                         }
1393                         antispoof_opts.rtableid = $2;
1394                 }
1395                 ;
1396
1397 not             : '!'           { $$ = 1; }
1398                 | /* empty */   { $$ = 0; }
1399                 ;
1400
1401 tabledef        : TABLE '<' STRING '>' table_opts {
1402                         struct node_host         *h, *nh;
1403                         struct node_tinit        *ti, *nti;
1404
1405                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1406                                 yyerror("table name too long, max %d chars",
1407                                     PF_TABLE_NAME_SIZE - 1);
1408                                 free($3);
1409                                 YYERROR;
1410                         }
1411                         if (pf->loadopt & PFCTL_FLAG_TABLE)
1412                                 if (process_tabledef($3, &$5)) {
1413                                         free($3);
1414                                         YYERROR;
1415                                 }
1416                         free($3);
1417                         for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1418                             ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1419                                 if (ti->file)
1420                                         free(ti->file);
1421                                 for (h = ti->host; h != NULL; h = nh) {
1422                                         nh = h->next;
1423                                         free(h);
1424                                 }
1425                                 nti = SIMPLEQ_NEXT(ti, entries);
1426                                 free(ti);
1427                         }
1428                 }
1429                 ;
1430
1431 table_opts      :       {
1432                         bzero(&table_opts, sizeof table_opts);
1433                         SIMPLEQ_INIT(&table_opts.init_nodes);
1434                 }
1435                     table_opts_l
1436                         { $$ = table_opts; }
1437                 | /* empty */
1438                         {
1439                         bzero(&table_opts, sizeof table_opts);
1440                         SIMPLEQ_INIT(&table_opts.init_nodes);
1441                         $$ = table_opts;
1442                 }
1443                 ;
1444
1445 table_opts_l    : table_opts_l table_opt
1446                 | table_opt
1447                 ;
1448
1449 table_opt       : STRING                {
1450                         if (!strcmp($1, "const"))
1451                                 table_opts.flags |= PFR_TFLAG_CONST;
1452                         else if (!strcmp($1, "persist"))
1453                                 table_opts.flags |= PFR_TFLAG_PERSIST;
1454                         else if (!strcmp($1, "counters"))
1455                                 table_opts.flags |= PFR_TFLAG_COUNTERS;
1456                         else {
1457                                 yyerror("invalid table option '%s'", $1);
1458                                 free($1);
1459                                 YYERROR;
1460                         }
1461                         free($1);
1462                 }
1463                 | '{' optnl '}'         { table_opts.init_addr = 1; }
1464                 | '{' optnl host_list '}'       {
1465                         struct node_host        *n;
1466                         struct node_tinit       *ti;
1467
1468                         for (n = $3; n != NULL; n = n->next) {
1469                                 switch (n->addr.type) {
1470                                 case PF_ADDR_ADDRMASK:
1471                                         continue; /* ok */
1472                                 case PF_ADDR_RANGE:
1473                                         yyerror("address ranges are not "
1474                                             "permitted inside tables");
1475                                         break;
1476                                 case PF_ADDR_DYNIFTL:
1477                                         yyerror("dynamic addresses are not "
1478                                             "permitted inside tables");
1479                                         break;
1480                                 case PF_ADDR_TABLE:
1481                                         yyerror("tables cannot contain tables");
1482                                         break;
1483                                 case PF_ADDR_NOROUTE:
1484                                         yyerror("\"no-route\" is not permitted "
1485                                             "inside tables");
1486                                         break;
1487                                 case PF_ADDR_URPFFAILED:
1488                                         yyerror("\"urpf-failed\" is not "
1489                                             "permitted inside tables");
1490                                         break;
1491                                 default:
1492                                         yyerror("unknown address type %d",
1493                                             n->addr.type);
1494                                 }
1495                                 YYERROR;
1496                         }
1497                         if (!(ti = calloc(1, sizeof(*ti))))
1498                                 err(1, "table_opt: calloc");
1499                         ti->host = $3;
1500                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1501                             entries);
1502                         table_opts.init_addr = 1;
1503                 }
1504                 | FILENAME STRING       {
1505                         struct node_tinit       *ti;
1506
1507                         if (!(ti = calloc(1, sizeof(*ti))))
1508                                 err(1, "table_opt: calloc");
1509                         ti->file = $2;
1510                         SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1511                             entries);
1512                         table_opts.init_addr = 1;
1513                 }
1514                 ;
1515
1516 altqif          : ALTQ interface queue_opts QUEUE qassign {
1517                         struct pf_altq  a;
1518
1519                         if (check_rulestate(PFCTL_STATE_QUEUE))
1520                                 YYERROR;
1521
1522                         memset(&a, 0, sizeof(a));
1523                         if ($3.scheduler.qtype == ALTQT_NONE) {
1524                                 yyerror("no scheduler specified!");
1525                                 YYERROR;
1526                         }
1527                         a.scheduler = $3.scheduler.qtype;
1528                         a.qlimit = $3.qlimit;
1529                         a.tbrsize = $3.tbrsize;
1530                         if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) {
1531                                 yyerror("no child queues specified");
1532                                 YYERROR;
1533                         }
1534                         if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1535                             &$3.scheduler))
1536                                 YYERROR;
1537                 }
1538                 ;
1539
1540 queuespec       : QUEUE STRING interface queue_opts qassign {
1541                         struct pf_altq  a;
1542
1543                         if (check_rulestate(PFCTL_STATE_QUEUE)) {
1544                                 free($2);
1545                                 YYERROR;
1546                         }
1547
1548                         memset(&a, 0, sizeof(a));
1549
1550                         if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1551                             sizeof(a.qname)) {
1552                                 yyerror("queue name too long (max "
1553                                     "%d chars)", PF_QNAME_SIZE-1);
1554                                 free($2);
1555                                 YYERROR;
1556                         }
1557                         free($2);
1558                         if ($4.tbrsize) {
1559                                 yyerror("cannot specify tbrsize for queue");
1560                                 YYERROR;
1561                         }
1562                         if ($4.priority > 255) {
1563                                 yyerror("priority out of range: max 255");
1564                                 YYERROR;
1565                         }
1566                         a.priority = $4.priority;
1567                         a.qlimit = $4.qlimit;
1568                         a.scheduler = $4.scheduler.qtype;
1569                         if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1570                             &$4.scheduler)) {
1571                                 yyerror("errors in queue definition");
1572                                 YYERROR;
1573                         }
1574                 }
1575                 ;
1576
1577 queue_opts      :       {
1578                         bzero(&queue_opts, sizeof queue_opts);
1579                         queue_opts.priority = DEFAULT_PRIORITY;
1580                         queue_opts.qlimit = DEFAULT_QLIMIT;
1581                         queue_opts.scheduler.qtype = ALTQT_NONE;
1582                         queue_opts.queue_bwspec.bw_percent = 100;
1583                 }
1584                     queue_opts_l
1585                         { $$ = queue_opts; }
1586                 | /* empty */ {
1587                         bzero(&queue_opts, sizeof queue_opts);
1588                         queue_opts.priority = DEFAULT_PRIORITY;
1589                         queue_opts.qlimit = DEFAULT_QLIMIT;
1590                         queue_opts.scheduler.qtype = ALTQT_NONE;
1591                         queue_opts.queue_bwspec.bw_percent = 100;
1592                         $$ = queue_opts;
1593                 }
1594                 ;
1595
1596 queue_opts_l    : queue_opts_l queue_opt
1597                 | queue_opt
1598                 ;
1599
1600 queue_opt       : BANDWIDTH bandwidth   {
1601                         if (queue_opts.marker & QOM_BWSPEC) {
1602                                 yyerror("bandwidth cannot be respecified");
1603                                 YYERROR;
1604                         }
1605                         queue_opts.marker |= QOM_BWSPEC;
1606                         queue_opts.queue_bwspec = $2;
1607                 }
1608                 | PRIORITY NUMBER       {
1609                         if (queue_opts.marker & QOM_PRIORITY) {
1610                                 yyerror("priority cannot be respecified");
1611                                 YYERROR;
1612                         }
1613                         if ($2 < 0 || $2 > 255) {
1614                                 yyerror("priority out of range: max 255");
1615                                 YYERROR;
1616                         }
1617                         queue_opts.marker |= QOM_PRIORITY;
1618                         queue_opts.priority = $2;
1619                 }
1620                 | QLIMIT NUMBER {
1621                         if (queue_opts.marker & QOM_QLIMIT) {
1622                                 yyerror("qlimit cannot be respecified");
1623                                 YYERROR;
1624                         }
1625                         if ($2 < 0 || $2 > 65535) {
1626                                 yyerror("qlimit out of range: max 65535");
1627                                 YYERROR;
1628                         }
1629                         queue_opts.marker |= QOM_QLIMIT;
1630                         queue_opts.qlimit = $2;
1631                 }
1632                 | scheduler     {
1633                         if (queue_opts.marker & QOM_SCHEDULER) {
1634                                 yyerror("scheduler cannot be respecified");
1635                                 YYERROR;
1636                         }
1637                         queue_opts.marker |= QOM_SCHEDULER;
1638                         queue_opts.scheduler = $1;
1639                 }
1640                 | TBRSIZE NUMBER        {
1641                         if (queue_opts.marker & QOM_TBRSIZE) {
1642                                 yyerror("tbrsize cannot be respecified");
1643                                 YYERROR;
1644                         }
1645                         if ($2 < 0 || $2 > UINT_MAX) {
1646                                 yyerror("tbrsize too big: max %u", UINT_MAX);
1647                                 YYERROR;
1648                         }
1649                         queue_opts.marker |= QOM_TBRSIZE;
1650                         queue_opts.tbrsize = $2;
1651                 }
1652                 ;
1653
1654 bandwidth       : STRING {
1655                         double   bps;
1656                         char    *cp;
1657
1658                         $$.bw_percent = 0;
1659
1660                         bps = strtod($1, &cp);
1661                         if (cp != NULL) {
1662                                 if (strlen(cp) > 1) {
1663                                         char *cu = cp + 1;
1664                                         if (!strcmp(cu, "Bit") ||
1665                                             !strcmp(cu, "B") ||
1666                                             !strcmp(cu, "bit") ||
1667                                             !strcmp(cu, "b")) {
1668                                                 *cu = 0;
1669                                         }
1670                                 }
1671                                 if (!strcmp(cp, "b"))
1672                                         ; /* nothing */
1673                                 else if (!strcmp(cp, "K"))
1674                                         bps *= 1000;
1675                                 else if (!strcmp(cp, "M"))
1676                                         bps *= 1000 * 1000;
1677                                 else if (!strcmp(cp, "G"))
1678                                         bps *= 1000 * 1000 * 1000;
1679                                 else if (!strcmp(cp, "%")) {
1680                                         if (bps < 0 || bps > 100) {
1681                                                 yyerror("bandwidth spec "
1682                                                     "out of range");
1683                                                 free($1);
1684                                                 YYERROR;
1685                                         }
1686                                         $$.bw_percent = bps;
1687                                         bps = 0;
1688                                 } else {
1689                                         yyerror("unknown unit %s", cp);
1690                                         free($1);
1691                                         YYERROR;
1692                                 }
1693                         }
1694                         free($1);
1695                         $$.bw_absolute = (u_int64_t)bps;
1696                 }
1697                 | NUMBER {
1698                         if ($1 < 0 || $1 >= LLONG_MAX) {
1699                                 yyerror("bandwidth number too big");
1700                                 YYERROR;
1701                         }
1702                         $$.bw_percent = 0;
1703                         $$.bw_absolute = $1;
1704                 }
1705                 ;
1706
1707 scheduler       : CBQ                           {
1708                         $$.qtype = ALTQT_CBQ;
1709                         $$.data.cbq_opts.flags = 0;
1710                 }
1711                 | CBQ '(' cbqflags_list ')'     {
1712                         $$.qtype = ALTQT_CBQ;
1713                         $$.data.cbq_opts.flags = $3;
1714                 }
1715                 | PRIQ                          {
1716                         $$.qtype = ALTQT_PRIQ;
1717                         $$.data.priq_opts.flags = 0;
1718                 }
1719                 | PRIQ '(' priqflags_list ')'   {
1720                         $$.qtype = ALTQT_PRIQ;
1721                         $$.data.priq_opts.flags = $3;
1722                 }
1723                 | HFSC                          {
1724                         $$.qtype = ALTQT_HFSC;
1725                         bzero(&$$.data.hfsc_opts,
1726                             sizeof(struct node_hfsc_opts));
1727                 }
1728                 | HFSC '(' hfsc_opts ')'        {
1729                         $$.qtype = ALTQT_HFSC;
1730                         $$.data.hfsc_opts = $3;
1731                 }
1732                 | FAIRQ                         {
1733                         $$.qtype = ALTQT_FAIRQ;
1734                         bzero(&$$.data.fairq_opts,
1735                                 sizeof(struct node_fairq_opts));
1736                 }
1737                 | FAIRQ '(' fairq_opts ')'      {
1738                         $$.qtype = ALTQT_FAIRQ;
1739                         $$.data.fairq_opts = $3;
1740                 }
1741                 | CODEL                         {
1742                         $$.qtype = ALTQT_CODEL;
1743                         bzero(&$$.data.codel_opts,
1744                                 sizeof(struct codel_opts));
1745                 }
1746                 | CODEL '(' codel_opts ')'      {
1747                         $$.qtype = ALTQT_CODEL;
1748                         $$.data.codel_opts = $3;
1749                 }
1750                 ;
1751
1752 cbqflags_list   : cbqflags_item                         { $$ |= $1; }
1753                 | cbqflags_list comma cbqflags_item     { $$ |= $3; }
1754                 ;
1755
1756 cbqflags_item   : STRING        {
1757                         if (!strcmp($1, "default"))
1758                                 $$ = CBQCLF_DEFCLASS;
1759                         else if (!strcmp($1, "borrow"))
1760                                 $$ = CBQCLF_BORROW;
1761                         else if (!strcmp($1, "red"))
1762                                 $$ = CBQCLF_RED;
1763                         else if (!strcmp($1, "ecn"))
1764                                 $$ = CBQCLF_RED|CBQCLF_ECN;
1765                         else if (!strcmp($1, "rio"))
1766                                 $$ = CBQCLF_RIO;
1767                         else if (!strcmp($1, "codel"))
1768                                 $$ = CBQCLF_CODEL;
1769                         else {
1770                                 yyerror("unknown cbq flag \"%s\"", $1);
1771                                 free($1);
1772                                 YYERROR;
1773                         }
1774                         free($1);
1775                 }
1776                 ;
1777
1778 priqflags_list  : priqflags_item                        { $$ |= $1; }
1779                 | priqflags_list comma priqflags_item   { $$ |= $3; }
1780                 ;
1781
1782 priqflags_item  : STRING        {
1783                         if (!strcmp($1, "default"))
1784                                 $$ = PRCF_DEFAULTCLASS;
1785                         else if (!strcmp($1, "red"))
1786                                 $$ = PRCF_RED;
1787                         else if (!strcmp($1, "ecn"))
1788                                 $$ = PRCF_RED|PRCF_ECN;
1789                         else if (!strcmp($1, "rio"))
1790                                 $$ = PRCF_RIO;
1791                         else if (!strcmp($1, "codel"))
1792                                 $$ = PRCF_CODEL;
1793                         else {
1794                                 yyerror("unknown priq flag \"%s\"", $1);
1795                                 free($1);
1796                                 YYERROR;
1797                         }
1798                         free($1);
1799                 }
1800                 ;
1801
1802 hfsc_opts       :       {
1803                                 bzero(&hfsc_opts,
1804                                     sizeof(struct node_hfsc_opts));
1805                         }
1806                     hfscopts_list                               {
1807                         $$ = hfsc_opts;
1808                 }
1809                 ;
1810
1811 hfscopts_list   : hfscopts_item
1812                 | hfscopts_list comma hfscopts_item
1813                 ;
1814
1815 hfscopts_item   : LINKSHARE bandwidth                           {
1816                         if (hfsc_opts.linkshare.used) {
1817                                 yyerror("linkshare already specified");
1818                                 YYERROR;
1819                         }
1820                         hfsc_opts.linkshare.m2 = $2;
1821                         hfsc_opts.linkshare.used = 1;
1822                 }
1823                 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1824                     {
1825                         if ($5 < 0 || $5 > INT_MAX) {
1826                                 yyerror("timing in curve out of range");
1827                                 YYERROR;
1828                         }
1829                         if (hfsc_opts.linkshare.used) {
1830                                 yyerror("linkshare already specified");
1831                                 YYERROR;
1832                         }
1833                         hfsc_opts.linkshare.m1 = $3;
1834                         hfsc_opts.linkshare.d = $5;
1835                         hfsc_opts.linkshare.m2 = $7;
1836                         hfsc_opts.linkshare.used = 1;
1837                 }
1838                 | REALTIME bandwidth                            {
1839                         if (hfsc_opts.realtime.used) {
1840                                 yyerror("realtime already specified");
1841                                 YYERROR;
1842                         }
1843                         hfsc_opts.realtime.m2 = $2;
1844                         hfsc_opts.realtime.used = 1;
1845                 }
1846                 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1847                     {
1848                         if ($5 < 0 || $5 > INT_MAX) {
1849                                 yyerror("timing in curve out of range");
1850                                 YYERROR;
1851                         }
1852                         if (hfsc_opts.realtime.used) {
1853                                 yyerror("realtime already specified");
1854                                 YYERROR;
1855                         }
1856                         hfsc_opts.realtime.m1 = $3;
1857                         hfsc_opts.realtime.d = $5;
1858                         hfsc_opts.realtime.m2 = $7;
1859                         hfsc_opts.realtime.used = 1;
1860                 }
1861                 | UPPERLIMIT bandwidth                          {
1862                         if (hfsc_opts.upperlimit.used) {
1863                                 yyerror("upperlimit already specified");
1864                                 YYERROR;
1865                         }
1866                         hfsc_opts.upperlimit.m2 = $2;
1867                         hfsc_opts.upperlimit.used = 1;
1868                 }
1869                 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1870                     {
1871                         if ($5 < 0 || $5 > INT_MAX) {
1872                                 yyerror("timing in curve out of range");
1873                                 YYERROR;
1874                         }
1875                         if (hfsc_opts.upperlimit.used) {
1876                                 yyerror("upperlimit already specified");
1877                                 YYERROR;
1878                         }
1879                         hfsc_opts.upperlimit.m1 = $3;
1880                         hfsc_opts.upperlimit.d = $5;
1881                         hfsc_opts.upperlimit.m2 = $7;
1882                         hfsc_opts.upperlimit.used = 1;
1883                 }
1884                 | STRING        {
1885                         if (!strcmp($1, "default"))
1886                                 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1887                         else if (!strcmp($1, "red"))
1888                                 hfsc_opts.flags |= HFCF_RED;
1889                         else if (!strcmp($1, "ecn"))
1890                                 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1891                         else if (!strcmp($1, "rio"))
1892                                 hfsc_opts.flags |= HFCF_RIO;
1893                         else if (!strcmp($1, "codel"))
1894                                 hfsc_opts.flags |= HFCF_CODEL;
1895                         else {
1896                                 yyerror("unknown hfsc flag \"%s\"", $1);
1897                                 free($1);
1898                                 YYERROR;
1899                         }
1900                         free($1);
1901                 }
1902                 ;
1903
1904 fairq_opts      :       {
1905                                 bzero(&fairq_opts,
1906                                     sizeof(struct node_fairq_opts));
1907                         }
1908                     fairqopts_list                              {
1909                         $$ = fairq_opts;
1910                 }
1911                 ;
1912
1913 fairqopts_list  : fairqopts_item
1914                 | fairqopts_list comma fairqopts_item
1915                 ;
1916
1917 fairqopts_item  : LINKSHARE bandwidth                           {
1918                         if (fairq_opts.linkshare.used) {
1919                                 yyerror("linkshare already specified");
1920                                 YYERROR;
1921                         }
1922                         fairq_opts.linkshare.m2 = $2;
1923                         fairq_opts.linkshare.used = 1;
1924                 }
1925                 | LINKSHARE '(' bandwidth number bandwidth ')'  {
1926                         if (fairq_opts.linkshare.used) {
1927                                 yyerror("linkshare already specified");
1928                                 YYERROR;
1929                         }
1930                         fairq_opts.linkshare.m1 = $3;
1931                         fairq_opts.linkshare.d = $4;
1932                         fairq_opts.linkshare.m2 = $5;
1933                         fairq_opts.linkshare.used = 1;
1934                 }
1935                 | HOGS bandwidth {
1936                         fairq_opts.hogs_bw = $2;
1937                 }
1938                 | BUCKETS number {
1939                         fairq_opts.nbuckets = $2;
1940                 }
1941                 | STRING        {
1942                         if (!strcmp($1, "default"))
1943                                 fairq_opts.flags |= FARF_DEFAULTCLASS;
1944                         else if (!strcmp($1, "red"))
1945                                 fairq_opts.flags |= FARF_RED;
1946                         else if (!strcmp($1, "ecn"))
1947                                 fairq_opts.flags |= FARF_RED|FARF_ECN;
1948                         else if (!strcmp($1, "rio"))
1949                                 fairq_opts.flags |= FARF_RIO;
1950                         else if (!strcmp($1, "codel"))
1951                                 fairq_opts.flags |= FARF_CODEL;
1952                         else {
1953                                 yyerror("unknown fairq flag \"%s\"", $1);
1954                                 free($1);
1955                                 YYERROR;
1956                         }
1957                         free($1);
1958                 }
1959                 ;
1960
1961 codel_opts      :       {
1962                                 bzero(&codel_opts,
1963                                     sizeof(struct codel_opts));
1964                         }
1965                     codelopts_list                              {
1966                         $$ = codel_opts;
1967                 }
1968                 ;
1969
1970 codelopts_list  : codelopts_item
1971                 | codelopts_list comma codelopts_item
1972                 ;
1973
1974 codelopts_item  : INTERVAL number                               {
1975                         if (codel_opts.interval) {
1976                                 yyerror("interval already specified");
1977                                 YYERROR;
1978                         }
1979                         codel_opts.interval = $2;
1980                 }
1981                 | TARGET number                                 {
1982                         if (codel_opts.target) {
1983                                 yyerror("target already specified");
1984                                 YYERROR;
1985                         }
1986                         codel_opts.target = $2;
1987                 }
1988                 | STRING                                        {
1989                         if (!strcmp($1, "ecn"))
1990                                 codel_opts.ecn = 1;
1991                         else {
1992                                 yyerror("unknown codel option \"%s\"", $1);
1993                                 free($1);
1994                                 YYERROR;
1995                         }
1996                         free($1);
1997                 }
1998                 ;
1999
2000 qassign         : /* empty */           { $$ = NULL; }
2001                 | qassign_item          { $$ = $1; }
2002                 | '{' optnl qassign_list '}'    { $$ = $3; }
2003                 ;
2004
2005 qassign_list    : qassign_item optnl            { $$ = $1; }
2006                 | qassign_list comma qassign_item optnl {
2007                         $1->tail->next = $3;
2008                         $1->tail = $3;
2009                         $$ = $1;
2010                 }
2011                 ;
2012
2013 qassign_item    : STRING                        {
2014                         $$ = calloc(1, sizeof(struct node_queue));
2015                         if ($$ == NULL)
2016                                 err(1, "qassign_item: calloc");
2017                         if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
2018                             sizeof($$->queue)) {
2019                                 yyerror("queue name '%s' too long (max "
2020                                     "%d chars)", $1, sizeof($$->queue)-1);
2021                                 free($1);
2022                                 free($$);
2023                                 YYERROR;
2024                         }
2025                         free($1);
2026                         $$->next = NULL;
2027                         $$->tail = $$;
2028                 }
2029                 ;
2030
2031 pfrule          : action dir logquick interface route af proto fromto
2032                     filter_opts
2033                 {
2034                         struct pfctl_rule        r;
2035                         struct node_state_opt   *o;
2036                         struct node_proto       *proto;
2037                         int                      srctrack = 0;
2038                         int                      statelock = 0;
2039                         int                      adaptive = 0;
2040                         int                      defaults = 0;
2041
2042                         if (check_rulestate(PFCTL_STATE_FILTER))
2043                                 YYERROR;
2044
2045                         memset(&r, 0, sizeof(r));
2046
2047                         r.action = $1.b1;
2048                         switch ($1.b2) {
2049                         case PFRULE_RETURNRST:
2050                                 r.rule_flag |= PFRULE_RETURNRST;
2051                                 r.return_ttl = $1.w;
2052                                 break;
2053                         case PFRULE_RETURNICMP:
2054                                 r.rule_flag |= PFRULE_RETURNICMP;
2055                                 r.return_icmp = $1.w;
2056                                 r.return_icmp6 = $1.w2;
2057                                 break;
2058                         case PFRULE_RETURN:
2059                                 r.rule_flag |= PFRULE_RETURN;
2060                                 r.return_icmp = $1.w;
2061                                 r.return_icmp6 = $1.w2;
2062                                 break;
2063                         }
2064                         r.direction = $2;
2065                         r.log = $3.log;
2066                         r.logif = $3.logif;
2067                         r.quick = $3.quick;
2068                         r.prob = $9.prob;
2069                         r.rtableid = $9.rtableid;
2070
2071                         if ($9.marker & FOM_PRIO) {
2072                                 if ($9.prio == 0)
2073                                         r.prio = PF_PRIO_ZERO;
2074                                 else
2075                                         r.prio = $9.prio;
2076                         }
2077                         if ($9.marker & FOM_SETPRIO) {
2078                                 r.set_prio[0] = $9.set_prio[0];
2079                                 r.set_prio[1] = $9.set_prio[1];
2080                                 r.scrub_flags |= PFSTATE_SETPRIO;
2081                         }
2082
2083                         r.af = $6;
2084                         if ($9.tag)
2085                                 if (strlcpy(r.tagname, $9.tag,
2086                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2087                                         yyerror("tag too long, max %u chars",
2088                                             PF_TAG_NAME_SIZE - 1);
2089                                         YYERROR;
2090                                 }
2091                         if ($9.match_tag)
2092                                 if (strlcpy(r.match_tagname, $9.match_tag,
2093                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2094                                         yyerror("tag too long, max %u chars",
2095                                             PF_TAG_NAME_SIZE - 1);
2096                                         YYERROR;
2097                                 }
2098                         r.match_tag_not = $9.match_tag_not;
2099                         if (rule_label(&r, $9.label))
2100                                 YYERROR;
2101                         for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
2102                                 free($9.label[i]);
2103                         r.flags = $9.flags.b1;
2104                         r.flagset = $9.flags.b2;
2105                         if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
2106                                 yyerror("flags always false");
2107                                 YYERROR;
2108                         }
2109                         if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
2110                                 for (proto = $7; proto != NULL &&
2111                                     proto->proto != IPPROTO_TCP;
2112                                     proto = proto->next)
2113                                         ;       /* nothing */
2114                                 if (proto == NULL && $7 != NULL) {
2115                                         if ($9.flags.b1 || $9.flags.b2)
2116                                                 yyerror(
2117                                                     "flags only apply to tcp");
2118                                         if ($8.src_os)
2119                                                 yyerror(
2120                                                     "OS fingerprinting only "
2121                                                     "apply to tcp");
2122                                         YYERROR;
2123                                 }
2124 #if 0
2125                                 if (($9.flags.b1 & parse_flags("S")) == 0 &&
2126                                     $8.src_os) {
2127                                         yyerror("OS fingerprinting requires "
2128                                             "the SYN TCP flag (flags S/SA)");
2129                                         YYERROR;
2130                                 }
2131 #endif
2132                         }
2133
2134                         r.tos = $9.tos;
2135                         r.keep_state = $9.keep.action;
2136                         o = $9.keep.options;
2137
2138                         /* 'keep state' by default on pass rules. */
2139                         if (!r.keep_state && !r.action &&
2140                             !($9.marker & FOM_KEEP)) {
2141                                 r.keep_state = PF_STATE_NORMAL;
2142                                 o = keep_state_defaults;
2143                                 defaults = 1;
2144                         }
2145
2146                         while (o) {
2147                                 struct node_state_opt   *p = o;
2148
2149                                 switch (o->type) {
2150                                 case PF_STATE_OPT_MAX:
2151                                         if (r.max_states) {
2152                                                 yyerror("state option 'max' "
2153                                                     "multiple definitions");
2154                                                 YYERROR;
2155                                         }
2156                                         r.max_states = o->data.max_states;
2157                                         break;
2158                                 case PF_STATE_OPT_NOSYNC:
2159                                         if (r.rule_flag & PFRULE_NOSYNC) {
2160                                                 yyerror("state option 'sync' "
2161                                                     "multiple definitions");
2162                                                 YYERROR;
2163                                         }
2164                                         r.rule_flag |= PFRULE_NOSYNC;
2165                                         break;
2166                                 case PF_STATE_OPT_SRCTRACK:
2167                                         if (srctrack) {
2168                                                 yyerror("state option "
2169                                                     "'source-track' "
2170                                                     "multiple definitions");
2171                                                 YYERROR;
2172                                         }
2173                                         srctrack =  o->data.src_track;
2174                                         r.rule_flag |= PFRULE_SRCTRACK;
2175                                         break;
2176                                 case PF_STATE_OPT_MAX_SRC_STATES:
2177                                         if (r.max_src_states) {
2178                                                 yyerror("state option "
2179                                                     "'max-src-states' "
2180                                                     "multiple definitions");
2181                                                 YYERROR;
2182                                         }
2183                                         if (o->data.max_src_states == 0) {
2184                                                 yyerror("'max-src-states' must "
2185                                                     "be > 0");
2186                                                 YYERROR;
2187                                         }
2188                                         r.max_src_states =
2189                                             o->data.max_src_states;
2190                                         r.rule_flag |= PFRULE_SRCTRACK;
2191                                         break;
2192                                 case PF_STATE_OPT_OVERLOAD:
2193                                         if (r.overload_tblname[0]) {
2194                                                 yyerror("multiple 'overload' "
2195                                                     "table definitions");
2196                                                 YYERROR;
2197                                         }
2198                                         if (strlcpy(r.overload_tblname,
2199                                             o->data.overload.tblname,
2200                                             PF_TABLE_NAME_SIZE) >=
2201                                             PF_TABLE_NAME_SIZE) {
2202                                                 yyerror("state option: "
2203                                                     "strlcpy");
2204                                                 YYERROR;
2205                                         }
2206                                         r.flush = o->data.overload.flush;
2207                                         break;
2208                                 case PF_STATE_OPT_MAX_SRC_CONN:
2209                                         if (r.max_src_conn) {
2210                                                 yyerror("state option "
2211                                                     "'max-src-conn' "
2212                                                     "multiple definitions");
2213                                                 YYERROR;
2214                                         }
2215                                         if (o->data.max_src_conn == 0) {
2216                                                 yyerror("'max-src-conn' "
2217                                                     "must be > 0");
2218                                                 YYERROR;
2219                                         }
2220                                         r.max_src_conn =
2221                                             o->data.max_src_conn;
2222                                         r.rule_flag |= PFRULE_SRCTRACK |
2223                                             PFRULE_RULESRCTRACK;
2224                                         break;
2225                                 case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2226                                         if (r.max_src_conn_rate.limit) {
2227                                                 yyerror("state option "
2228                                                     "'max-src-conn-rate' "
2229                                                     "multiple definitions");
2230                                                 YYERROR;
2231                                         }
2232                                         if (!o->data.max_src_conn_rate.limit ||
2233                                             !o->data.max_src_conn_rate.seconds) {
2234                                                 yyerror("'max-src-conn-rate' "
2235                                                     "values must be > 0");
2236                                                 YYERROR;
2237                                         }
2238                                         if (o->data.max_src_conn_rate.limit >
2239                                             PF_THRESHOLD_MAX) {
2240                                                 yyerror("'max-src-conn-rate' "
2241                                                     "maximum rate must be < %u",
2242                                                     PF_THRESHOLD_MAX);
2243                                                 YYERROR;
2244                                         }
2245                                         r.max_src_conn_rate.limit =
2246                                             o->data.max_src_conn_rate.limit;
2247                                         r.max_src_conn_rate.seconds =
2248                                             o->data.max_src_conn_rate.seconds;
2249                                         r.rule_flag |= PFRULE_SRCTRACK |
2250                                             PFRULE_RULESRCTRACK;
2251                                         break;
2252                                 case PF_STATE_OPT_MAX_SRC_NODES:
2253                                         if (r.max_src_nodes) {
2254                                                 yyerror("state option "
2255                                                     "'max-src-nodes' "
2256                                                     "multiple definitions");
2257                                                 YYERROR;
2258                                         }
2259                                         if (o->data.max_src_nodes == 0) {
2260                                                 yyerror("'max-src-nodes' must "
2261                                                     "be > 0");
2262                                                 YYERROR;
2263                                         }
2264                                         r.max_src_nodes =
2265                                             o->data.max_src_nodes;
2266                                         r.rule_flag |= PFRULE_SRCTRACK |
2267                                             PFRULE_RULESRCTRACK;
2268                                         break;
2269                                 case PF_STATE_OPT_STATELOCK:
2270                                         if (statelock) {
2271                                                 yyerror("state locking option: "
2272                                                     "multiple definitions");
2273                                                 YYERROR;
2274                                         }
2275                                         statelock = 1;
2276                                         r.rule_flag |= o->data.statelock;
2277                                         break;
2278                                 case PF_STATE_OPT_SLOPPY:
2279                                         if (r.rule_flag & PFRULE_STATESLOPPY) {
2280                                                 yyerror("state sloppy option: "
2281                                                     "multiple definitions");
2282                                                 YYERROR;
2283                                         }
2284                                         r.rule_flag |= PFRULE_STATESLOPPY;
2285                                         break;
2286                                 case PF_STATE_OPT_TIMEOUT:
2287                                         if (o->data.timeout.number ==
2288                                             PFTM_ADAPTIVE_START ||
2289                                             o->data.timeout.number ==
2290                                             PFTM_ADAPTIVE_END)
2291                                                 adaptive = 1;
2292                                         if (r.timeout[o->data.timeout.number]) {
2293                                                 yyerror("state timeout %s "
2294                                                     "multiple definitions",
2295                                                     pf_timeouts[o->data.
2296                                                     timeout.number].name);
2297                                                 YYERROR;
2298                                         }
2299                                         r.timeout[o->data.timeout.number] =
2300                                             o->data.timeout.seconds;
2301                                 }
2302                                 o = o->next;
2303                                 if (!defaults)
2304                                         free(p);
2305                         }
2306
2307                         /* 'flags S/SA' by default on stateful rules */
2308                         if (!r.action && !r.flags && !r.flagset &&
2309                             !$9.fragment && !($9.marker & FOM_FLAGS) &&
2310                             r.keep_state) {
2311                                 r.flags = parse_flags("S");
2312                                 r.flagset =  parse_flags("SA");
2313                         }
2314                         if (!adaptive && r.max_states) {
2315                                 r.timeout[PFTM_ADAPTIVE_START] =
2316                                     (r.max_states / 10) * 6;
2317                                 r.timeout[PFTM_ADAPTIVE_END] =
2318                                     (r.max_states / 10) * 12;
2319                         }
2320                         if (r.rule_flag & PFRULE_SRCTRACK) {
2321                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2322                                     r.max_src_nodes) {
2323                                         yyerror("'max-src-nodes' is "
2324                                             "incompatible with "
2325                                             "'source-track global'");
2326                                         YYERROR;
2327                                 }
2328                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2329                                     r.max_src_conn) {
2330                                         yyerror("'max-src-conn' is "
2331                                             "incompatible with "
2332                                             "'source-track global'");
2333                                         YYERROR;
2334                                 }
2335                                 if (srctrack == PF_SRCTRACK_GLOBAL &&
2336                                     r.max_src_conn_rate.seconds) {
2337                                         yyerror("'max-src-conn-rate' is "
2338                                             "incompatible with "
2339                                             "'source-track global'");
2340                                         YYERROR;
2341                                 }
2342                                 if (r.timeout[PFTM_SRC_NODE] <
2343                                     r.max_src_conn_rate.seconds)
2344                                         r.timeout[PFTM_SRC_NODE] =
2345                                             r.max_src_conn_rate.seconds;
2346                                 r.rule_flag |= PFRULE_SRCTRACK;
2347                                 if (srctrack == PF_SRCTRACK_RULE)
2348                                         r.rule_flag |= PFRULE_RULESRCTRACK;
2349                         }
2350                         if (r.keep_state && !statelock)
2351                                 r.rule_flag |= default_statelock;
2352
2353                         if ($9.fragment)
2354                                 r.rule_flag |= PFRULE_FRAGMENT;
2355                         r.allow_opts = $9.allowopts;
2356
2357                         decide_address_family($8.src.host, &r.af);
2358                         decide_address_family($8.dst.host, &r.af);
2359
2360                         if ($5.rt) {
2361                                 if (!r.direction) {
2362                                         yyerror("direction must be explicit "
2363                                             "with rules that specify routing");
2364                                         YYERROR;
2365                                 }
2366                                 r.rt = $5.rt;
2367                                 r.rpool.opts = $5.pool_opts;
2368                                 if ($5.key != NULL)
2369                                         memcpy(&r.rpool.key, $5.key,
2370                                             sizeof(struct pf_poolhashkey));
2371                         }
2372                         if (r.rt) {
2373                                 decide_address_family($5.host, &r.af);
2374                                 remove_invalid_hosts(&$5.host, &r.af);
2375                                 if ($5.host == NULL) {
2376                                         yyerror("no routing address with "
2377                                             "matching address family found.");
2378                                         YYERROR;
2379                                 }
2380                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2381                                     PF_POOL_NONE && ($5.host->next != NULL ||
2382                                     $5.host->addr.type == PF_ADDR_TABLE ||
2383                                     DYNIF_MULTIADDR($5.host->addr)))
2384                                         r.rpool.opts |= PF_POOL_ROUNDROBIN;
2385                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2386                                     PF_POOL_ROUNDROBIN &&
2387                                     disallow_table($5.host, "tables are only "
2388                                     "supported in round-robin routing pools"))
2389                                         YYERROR;
2390                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2391                                     PF_POOL_ROUNDROBIN &&
2392                                     disallow_alias($5.host, "interface (%s) "
2393                                     "is only supported in round-robin "
2394                                     "routing pools"))
2395                                         YYERROR;
2396                                 if ($5.host->next != NULL) {
2397                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2398                                             PF_POOL_ROUNDROBIN) {
2399                                                 yyerror("r.rpool.opts must "
2400                                                     "be PF_POOL_ROUNDROBIN");
2401                                                 YYERROR;
2402                                         }
2403                                 }
2404                         }
2405                         if ($9.queues.qname != NULL) {
2406                                 if (strlcpy(r.qname, $9.queues.qname,
2407                                     sizeof(r.qname)) >= sizeof(r.qname)) {
2408                                         yyerror("rule qname too long (max "
2409                                             "%d chars)", sizeof(r.qname)-1);
2410                                         YYERROR;
2411                                 }
2412                                 free($9.queues.qname);
2413                         }
2414                         if ($9.queues.pqname != NULL) {
2415                                 if (strlcpy(r.pqname, $9.queues.pqname,
2416                                     sizeof(r.pqname)) >= sizeof(r.pqname)) {
2417                                         yyerror("rule pqname too long (max "
2418                                             "%d chars)", sizeof(r.pqname)-1);
2419                                         YYERROR;
2420                                 }
2421                                 free($9.queues.pqname);
2422                         }
2423 #ifdef __FreeBSD__
2424                         r.divert.port = $9.divert.port;
2425 #else
2426                         if ((r.divert.port = $9.divert.port)) {
2427                                 if (r.direction == PF_OUT) {
2428                                         if ($9.divert.addr) {
2429                                                 yyerror("address specified "
2430                                                     "for outgoing divert");
2431                                                 YYERROR;
2432                                         }
2433                                         bzero(&r.divert.addr,
2434                                             sizeof(r.divert.addr));
2435                                 } else {
2436                                         if (!$9.divert.addr) {
2437                                                 yyerror("no address specified "
2438                                                     "for incoming divert");
2439                                                 YYERROR;
2440                                         }
2441                                         if ($9.divert.addr->af != r.af) {
2442                                                 yyerror("address family "
2443                                                     "mismatch for divert");
2444                                                 YYERROR;
2445                                         }
2446                                         r.divert.addr =
2447                                             $9.divert.addr->addr.v.a.addr;
2448                                 }
2449                         }
2450 #endif
2451
2452                         expand_rule(&r, $4, $5.host, $7, $8.src_os,
2453                             $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
2454                             $9.uid, $9.gid, $9.icmpspec, "");
2455                 }
2456                 ;
2457
2458 filter_opts     :       {
2459                                 bzero(&filter_opts, sizeof filter_opts);
2460                                 filter_opts.rtableid = -1;
2461                         }
2462                     filter_opts_l
2463                         { $$ = filter_opts; }
2464                 | /* empty */   {
2465                         bzero(&filter_opts, sizeof filter_opts);
2466                         filter_opts.rtableid = -1;
2467                         $$ = filter_opts;
2468                 }
2469                 ;
2470
2471 filter_opts_l   : filter_opts_l filter_opt
2472                 | filter_opt
2473                 ;
2474
2475 filter_opt      : USER uids {
2476                         if (filter_opts.uid)
2477                                 $2->tail->next = filter_opts.uid;
2478                         filter_opts.uid = $2;
2479                 }
2480                 | GROUP gids {
2481                         if (filter_opts.gid)
2482                                 $2->tail->next = filter_opts.gid;
2483                         filter_opts.gid = $2;
2484                 }
2485                 | flags {
2486                         if (filter_opts.marker & FOM_FLAGS) {
2487                                 yyerror("flags cannot be redefined");
2488                                 YYERROR;
2489                         }
2490                         filter_opts.marker |= FOM_FLAGS;
2491                         filter_opts.flags.b1 |= $1.b1;
2492                         filter_opts.flags.b2 |= $1.b2;
2493                         filter_opts.flags.w |= $1.w;
2494                         filter_opts.flags.w2 |= $1.w2;
2495                 }
2496                 | icmpspec {
2497                         if (filter_opts.marker & FOM_ICMP) {
2498                                 yyerror("icmp-type cannot be redefined");
2499                                 YYERROR;
2500                         }
2501                         filter_opts.marker |= FOM_ICMP;
2502                         filter_opts.icmpspec = $1;
2503                 }
2504                 | PRIO NUMBER {
2505                         if (filter_opts.marker & FOM_PRIO) {
2506                                 yyerror("prio cannot be redefined");
2507                                 YYERROR;
2508                         }
2509                         if ($2 < 0 || $2 > PF_PRIO_MAX) {
2510                                 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2511                                 YYERROR;
2512                         }
2513                         filter_opts.marker |= FOM_PRIO;
2514                         filter_opts.prio = $2;
2515                 }
2516                 | TOS tos {
2517                         if (filter_opts.marker & FOM_TOS) {
2518                                 yyerror("tos cannot be redefined");
2519                                 YYERROR;
2520                         }
2521                         filter_opts.marker |= FOM_TOS;
2522                         filter_opts.tos = $2;
2523                 }
2524                 | keep {
2525                         if (filter_opts.marker & FOM_KEEP) {
2526                                 yyerror("modulate or keep cannot be redefined");
2527                                 YYERROR;
2528                         }
2529                         filter_opts.marker |= FOM_KEEP;
2530                         filter_opts.keep.action = $1.action;
2531                         filter_opts.keep.options = $1.options;
2532                 }
2533                 | FRAGMENT {
2534                         filter_opts.fragment = 1;
2535                 }
2536                 | ALLOWOPTS {
2537                         filter_opts.allowopts = 1;
2538                 }
2539                 | label {
2540                         if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
2541                                 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
2542                                 YYERROR;
2543                         }
2544                         filter_opts.label[filter_opts.labelcount++] = $1;
2545                 }
2546                 | qname {
2547                         if (filter_opts.queues.qname) {
2548                                 yyerror("queue cannot be redefined");
2549                                 YYERROR;
2550                         }
2551                         filter_opts.queues = $1;
2552                 }
2553                 | TAG string                            {
2554                         filter_opts.tag = $2;
2555                 }
2556                 | not TAGGED string                     {
2557                         filter_opts.match_tag = $3;
2558                         filter_opts.match_tag_not = $1;
2559                 }
2560                 | PROBABILITY probability               {
2561                         double  p;
2562
2563                         p = floor($2 * UINT_MAX + 0.5);
2564                         if (p < 0.0 || p > UINT_MAX) {
2565                                 yyerror("invalid probability: %lf", p);
2566                                 YYERROR;
2567                         }
2568                         filter_opts.prob = (u_int32_t)p;
2569                         if (filter_opts.prob == 0)
2570                                 filter_opts.prob = 1;
2571                 }
2572                 | RTABLE NUMBER                         {
2573                         if ($2 < 0 || $2 > rt_tableid_max()) {
2574                                 yyerror("invalid rtable id");
2575                                 YYERROR;
2576                         }
2577                         filter_opts.rtableid = $2;
2578                 }
2579                 | DIVERTTO portplain {
2580 #ifdef __FreeBSD__
2581                         filter_opts.divert.port = $2.a;
2582                         if (!filter_opts.divert.port) {
2583                                 yyerror("invalid divert port: %u", ntohs($2.a));
2584                                 YYERROR;
2585                         }
2586 #endif
2587                 }
2588                 | DIVERTTO STRING PORT portplain {
2589 #ifndef __FreeBSD__
2590                         if ((filter_opts.divert.addr = host($2)) == NULL) {
2591                                 yyerror("could not parse divert address: %s",
2592                                     $2);
2593                                 free($2);
2594                                 YYERROR;
2595                         }
2596 #else
2597                         if ($2)
2598 #endif
2599                         free($2);
2600                         filter_opts.divert.port = $4.a;
2601                         if (!filter_opts.divert.port) {
2602                                 yyerror("invalid divert port: %u", ntohs($4.a));
2603                                 YYERROR;
2604                         }
2605                 }
2606                 | DIVERTREPLY {
2607 #ifdef __FreeBSD__
2608                         yyerror("divert-reply has no meaning in FreeBSD pf(4)");
2609                         YYERROR;
2610 #else
2611                         filter_opts.divert.port = 1;    /* some random value */
2612 #endif
2613                 }
2614                 | filter_sets
2615                 ;
2616
2617 filter_sets     : SET '(' filter_sets_l ')'     { $$ = filter_opts; }
2618                 | SET filter_set                { $$ = filter_opts; }
2619                 ;
2620
2621 filter_sets_l   : filter_sets_l comma filter_set
2622                 | filter_set
2623                 ;
2624
2625 filter_set      : prio {
2626                         if (filter_opts.marker & FOM_SETPRIO) {
2627                                 yyerror("prio cannot be redefined");
2628                                 YYERROR;
2629                         }
2630                         filter_opts.marker |= FOM_SETPRIO;
2631                         filter_opts.set_prio[0] = $1.b1;
2632                         filter_opts.set_prio[1] = $1.b2;
2633                 }
2634 prio            : PRIO NUMBER {
2635                         if ($2 < 0 || $2 > PF_PRIO_MAX) {
2636                                 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2637                                 YYERROR;
2638                         }
2639                         $$.b1 = $$.b2 = $2;
2640                 }
2641                 | PRIO '(' NUMBER comma NUMBER ')' {
2642                         if ($3 < 0 || $3 > PF_PRIO_MAX ||
2643                             $5 < 0 || $5 > PF_PRIO_MAX) {
2644                                 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2645                                 YYERROR;
2646                         }
2647                         $$.b1 = $3;
2648                         $$.b2 = $5;
2649                 }
2650                 ;
2651
2652 probability     : STRING                                {
2653                         char    *e;
2654                         double   p = strtod($1, &e);
2655
2656                         if (*e == '%') {
2657                                 p *= 0.01;
2658                                 e++;
2659                         }
2660                         if (*e) {
2661                                 yyerror("invalid probability: %s", $1);
2662                                 free($1);
2663                                 YYERROR;
2664                         }
2665                         free($1);
2666                         $$ = p;
2667                 }
2668                 | NUMBER                                {
2669                         $$ = (double)$1;
2670                 }
2671                 ;
2672
2673
2674 action          : PASS                  {
2675                         $$.b1 = PF_PASS;
2676                         $$.b2 = failpolicy;
2677                         $$.w = returnicmpdefault;
2678                         $$.w2 = returnicmp6default;
2679                 }
2680                 | BLOCK blockspec       { $$ = $2; $$.b1 = PF_DROP; }
2681                 ;
2682
2683 blockspec       : /* empty */           {
2684                         $$.b2 = blockpolicy;
2685                         $$.w = returnicmpdefault;
2686                         $$.w2 = returnicmp6default;
2687                 }
2688                 | DROP                  {
2689                         $$.b2 = PFRULE_DROP;
2690                         $$.w = 0;
2691                         $$.w2 = 0;
2692                 }
2693                 | RETURNRST             {
2694                         $$.b2 = PFRULE_RETURNRST;
2695                         $$.w = 0;
2696                         $$.w2 = 0;
2697                 }
2698                 | RETURNRST '(' TTL NUMBER ')'  {
2699                         if ($4 < 0 || $4 > 255) {
2700                                 yyerror("illegal ttl value %d", $4);
2701                                 YYERROR;
2702                         }
2703                         $$.b2 = PFRULE_RETURNRST;
2704                         $$.w = $4;
2705                         $$.w2 = 0;
2706                 }
2707                 | RETURNICMP            {
2708                         $$.b2 = PFRULE_RETURNICMP;
2709                         $$.w = returnicmpdefault;
2710                         $$.w2 = returnicmp6default;
2711                 }
2712                 | RETURNICMP6           {
2713                         $$.b2 = PFRULE_RETURNICMP;
2714                         $$.w = returnicmpdefault;
2715                         $$.w2 = returnicmp6default;
2716                 }
2717                 | RETURNICMP '(' reticmpspec ')'        {
2718                         $$.b2 = PFRULE_RETURNICMP;
2719                         $$.w = $3;
2720                         $$.w2 = returnicmpdefault;
2721                 }
2722                 | RETURNICMP6 '(' reticmp6spec ')'      {
2723                         $$.b2 = PFRULE_RETURNICMP;
2724                         $$.w = returnicmpdefault;
2725                         $$.w2 = $3;
2726                 }
2727                 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2728                         $$.b2 = PFRULE_RETURNICMP;
2729                         $$.w = $3;
2730                         $$.w2 = $5;
2731                 }
2732                 | RETURN {
2733                         $$.b2 = PFRULE_RETURN;
2734                         $$.w = returnicmpdefault;
2735                         $$.w2 = returnicmp6default;
2736                 }
2737                 ;
2738
2739 reticmpspec     : STRING                        {
2740                         if (!($$ = parseicmpspec($1, AF_INET))) {
2741                                 free($1);
2742                                 YYERROR;
2743                         }
2744                         free($1);
2745                 }
2746                 | NUMBER                        {
2747                         u_int8_t                icmptype;
2748
2749                         if ($1 < 0 || $1 > 255) {
2750                                 yyerror("invalid icmp code %lu", $1);
2751                                 YYERROR;
2752                         }
2753                         icmptype = returnicmpdefault >> 8;
2754                         $$ = (icmptype << 8 | $1);
2755                 }
2756                 ;
2757
2758 reticmp6spec    : STRING                        {
2759                         if (!($$ = parseicmpspec($1, AF_INET6))) {
2760                                 free($1);
2761                                 YYERROR;
2762                         }
2763                         free($1);
2764                 }
2765                 | NUMBER                        {
2766                         u_int8_t                icmptype;
2767
2768                         if ($1 < 0 || $1 > 255) {
2769                                 yyerror("invalid icmp code %lu", $1);
2770                                 YYERROR;
2771                         }
2772                         icmptype = returnicmp6default >> 8;
2773                         $$ = (icmptype << 8 | $1);
2774                 }
2775                 ;
2776
2777 dir             : /* empty */                   { $$ = PF_INOUT; }
2778                 | IN                            { $$ = PF_IN; }
2779                 | OUT                           { $$ = PF_OUT; }
2780                 ;
2781
2782 quick           : /* empty */                   { $$.quick = 0; }
2783                 | QUICK                         { $$.quick = 1; }
2784                 ;
2785
2786 logquick        : /* empty */   { $$.log = 0; $$.quick = 0; $$.logif = 0; }
2787                 | log           { $$ = $1; $$.quick = 0; }
2788                 | QUICK         { $$.quick = 1; $$.log = 0; $$.logif = 0; }
2789                 | log QUICK     { $$ = $1; $$.quick = 1; }
2790                 | QUICK log     { $$ = $2; $$.quick = 1; }
2791                 ;
2792
2793 log             : LOG                   { $$.log = PF_LOG; $$.logif = 0; }
2794                 | LOG '(' logopts ')'   {
2795                         $$.log = PF_LOG | $3.log;
2796                         $$.logif = $3.logif;
2797                 }
2798                 ;
2799
2800 logopts         : logopt                        { $$ = $1; }
2801                 | logopts comma logopt          {
2802                         $$.log = $1.log | $3.log;
2803                         $$.logif = $3.logif;
2804                         if ($$.logif == 0)
2805                                 $$.logif = $1.logif;
2806                 }
2807                 ;
2808
2809 logopt          : ALL           { $$.log = PF_LOG_ALL; $$.logif = 0; }
2810                 | USER          { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2811                 | GROUP         { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2812                 | TO string     {
2813                         const char      *errstr;
2814                         u_int            i;
2815
2816                         $$.log = 0;
2817                         if (strncmp($2, "pflog", 5)) {
2818                                 yyerror("%s: should be a pflog interface", $2);
2819                                 free($2);
2820                                 YYERROR;
2821                         }
2822                         i = strtonum($2 + 5, 0, 255, &errstr);
2823                         if (errstr) {
2824                                 yyerror("%s: %s", $2, errstr);
2825                                 free($2);
2826                                 YYERROR;
2827                         }
2828                         free($2);
2829                         $$.logif = i;
2830                 }
2831                 ;
2832
2833 interface       : /* empty */                   { $$ = NULL; }
2834                 | ON if_item_not                { $$ = $2; }
2835                 | ON '{' optnl if_list '}'      { $$ = $4; }
2836                 ;
2837
2838 if_list         : if_item_not optnl             { $$ = $1; }
2839                 | if_list comma if_item_not optnl       {
2840                         $1->tail->next = $3;
2841                         $1->tail = $3;
2842                         $$ = $1;
2843                 }
2844                 ;
2845
2846 if_item_not     : not if_item                   { $$ = $2; $$->not = $1; }
2847                 ;
2848
2849 if_item         : STRING                        {
2850                         struct node_host        *n;
2851
2852                         $$ = calloc(1, sizeof(struct node_if));
2853                         if ($$ == NULL)
2854                                 err(1, "if_item: calloc");
2855                         if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2856                             sizeof($$->ifname)) {
2857                                 free($1);
2858                                 free($$);
2859                                 yyerror("interface name too long");
2860                                 YYERROR;
2861                         }
2862
2863                         if ((n = ifa_exists($1)) != NULL)
2864                                 $$->ifa_flags = n->ifa_flags;
2865
2866                         free($1);
2867                         $$->not = 0;
2868                         $$->next = NULL;
2869                         $$->tail = $$;
2870                 }
2871                 ;
2872
2873 af              : /* empty */                   { $$ = 0; }
2874                 | INET                          { $$ = AF_INET; }
2875                 | INET6                         { $$ = AF_INET6; }
2876                 ;
2877
2878 proto           : /* empty */                           { $$ = NULL; }
2879                 | PROTO proto_item                      { $$ = $2; }
2880                 | PROTO '{' optnl proto_list '}'        { $$ = $4; }
2881                 ;
2882
2883 proto_list      : proto_item optnl              { $$ = $1; }
2884                 | proto_list comma proto_item optnl     {
2885                         $1->tail->next = $3;
2886                         $1->tail = $3;
2887                         $$ = $1;
2888                 }
2889                 ;
2890
2891 proto_item      : protoval                      {
2892                         u_int8_t        pr;
2893
2894                         pr = (u_int8_t)$1;
2895                         if (pr == 0) {
2896                                 yyerror("proto 0 cannot be used");
2897                                 YYERROR;
2898                         }
2899                         $$ = calloc(1, sizeof(struct node_proto));
2900                         if ($$ == NULL)
2901                                 err(1, "proto_item: calloc");
2902                         $$->proto = pr;
2903                         $$->next = NULL;
2904                         $$->tail = $$;
2905                 }
2906                 ;
2907
2908 protoval        : STRING                        {
2909                         struct protoent *p;
2910
2911                         p = getprotobyname($1);
2912                         if (p == NULL) {
2913                                 yyerror("unknown protocol %s", $1);
2914                                 free($1);
2915                                 YYERROR;
2916                         }
2917                         $$ = p->p_proto;
2918                         free($1);
2919                 }
2920                 | NUMBER                        {
2921                         if ($1 < 0 || $1 > 255) {
2922                                 yyerror("protocol outside range");
2923                                 YYERROR;
2924                         }
2925                 }
2926                 ;
2927
2928 fromto          : ALL                           {
2929                         $$.src.host = NULL;
2930                         $$.src.port = NULL;
2931                         $$.dst.host = NULL;
2932                         $$.dst.port = NULL;
2933                         $$.src_os = NULL;
2934                 }
2935                 | from os to                    {
2936                         $$.src = $1;
2937                         $$.src_os = $2;
2938                         $$.dst = $3;
2939                 }
2940                 ;
2941
2942 os              : /* empty */                   { $$ = NULL; }
2943                 | OS xos                        { $$ = $2; }
2944                 | OS '{' optnl os_list '}'      { $$ = $4; }
2945                 ;
2946
2947 xos             : STRING {
2948                         $$ = calloc(1, sizeof(struct node_os));
2949                         if ($$ == NULL)
2950                                 err(1, "os: calloc");
2951                         $$->os = $1;
2952                         $$->tail = $$;
2953                 }
2954                 ;
2955
2956 os_list         : xos optnl                     { $$ = $1; }
2957                 | os_list comma xos optnl       {
2958                         $1->tail->next = $3;
2959                         $1->tail = $3;
2960                         $$ = $1;
2961                 }
2962                 ;
2963
2964 from            : /* empty */                   {
2965                         $$.host = NULL;
2966                         $$.port = NULL;
2967                 }
2968                 | FROM ipportspec               {
2969                         $$ = $2;
2970                 }
2971                 ;
2972
2973 to              : /* empty */                   {
2974                         $$.host = NULL;
2975                         $$.port = NULL;
2976                 }
2977                 | TO ipportspec         {
2978                         if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
2979                             "not permitted in a destination address"))
2980                                 YYERROR;
2981                         $$ = $2;
2982                 }
2983                 ;
2984
2985 ipportspec      : ipspec                        {
2986                         $$.host = $1;
2987                         $$.port = NULL;
2988                 }
2989                 | ipspec PORT portspec          {
2990                         $$.host = $1;
2991                         $$.port = $3;
2992                 }
2993                 | PORT portspec                 {
2994                         $$.host = NULL;
2995                         $$.port = $2;
2996                 }
2997                 ;
2998
2999 optnl           : '\n' optnl
3000                 |
3001                 ;
3002
3003 ipspec          : ANY                           { $$ = NULL; }
3004                 | xhost                         { $$ = $1; }
3005                 | '{' optnl host_list '}'       { $$ = $3; }
3006                 ;
3007
3008 toipspec        : TO ipspec                     { $$ = $2; }
3009                 | /* empty */                   { $$ = NULL; }
3010                 ;
3011
3012 host_list       : ipspec optnl                  { $$ = $1; }
3013                 | host_list comma ipspec optnl  {
3014                         if ($3 == NULL)
3015                                 $$ = $1;
3016                         else if ($1 == NULL)
3017                                 $$ = $3;
3018                         else {
3019                                 $1->tail->next = $3;
3020                                 $1->tail = $3->tail;
3021                                 $$ = $1;
3022                         }
3023                 }
3024                 ;
3025
3026 xhost           : not host                      {
3027                         struct node_host        *n;
3028
3029                         for (n = $2; n != NULL; n = n->next)
3030                                 n->not = $1;
3031                         $$ = $2;
3032                 }
3033                 | not NOROUTE                   {
3034                         $$ = calloc(1, sizeof(struct node_host));
3035                         if ($$ == NULL)
3036                                 err(1, "xhost: calloc");
3037                         $$->addr.type = PF_ADDR_NOROUTE;
3038                         $$->next = NULL;
3039                         $$->not = $1;
3040                         $$->tail = $$;
3041                 }
3042                 | not URPFFAILED                {
3043                         $$ = calloc(1, sizeof(struct node_host));
3044                         if ($$ == NULL)
3045                                 err(1, "xhost: calloc");
3046                         $$->addr.type = PF_ADDR_URPFFAILED;
3047                         $$->next = NULL;
3048                         $$->not = $1;
3049                         $$->tail = $$;
3050                 }
3051                 ;
3052
3053 host            : STRING                        {
3054                         if (($$ = host($1)) == NULL)    {
3055                                 /* error. "any" is handled elsewhere */
3056                                 free($1);
3057                                 yyerror("could not parse host specification");
3058                                 YYERROR;
3059                         }
3060                         free($1);
3061
3062                 }
3063                 | STRING '-' STRING             {
3064                         struct node_host *b, *e;
3065
3066                         if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
3067                                 free($1);
3068                                 free($3);
3069                                 yyerror("could not parse host specification");
3070                                 YYERROR;
3071                         }
3072                         if (b->af != e->af ||
3073                             b->addr.type != PF_ADDR_ADDRMASK ||
3074                             e->addr.type != PF_ADDR_ADDRMASK ||
3075                             unmask(&b->addr.v.a.mask, b->af) !=
3076                             (b->af == AF_INET ? 32 : 128) ||
3077                             unmask(&e->addr.v.a.mask, e->af) !=
3078                             (e->af == AF_INET ? 32 : 128) ||
3079                             b->next != NULL || b->not ||
3080                             e->next != NULL || e->not) {
3081                                 free(b);
3082                                 free(e);
3083                                 free($1);
3084                                 free($3);
3085                                 yyerror("invalid address range");
3086                                 YYERROR;
3087                         }
3088                         memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
3089                             sizeof(b->addr.v.a.mask));
3090                         b->addr.type = PF_ADDR_RANGE;
3091                         $$ = b;
3092                         free(e);
3093                         free($1);
3094                         free($3);
3095                 }
3096                 | STRING '/' NUMBER             {
3097                         char    *buf;
3098
3099                         if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1)
3100                                 err(1, "host: asprintf");
3101                         free($1);
3102                         if (($$ = host(buf)) == NULL)   {
3103                                 /* error. "any" is handled elsewhere */
3104                                 free(buf);
3105                                 yyerror("could not parse host specification");
3106                                 YYERROR;
3107                         }
3108                         free(buf);
3109                 }
3110                 | NUMBER '/' NUMBER             {
3111                         char    *buf;
3112
3113                         /* ie. for 10/8 parsing */
3114 #ifdef __FreeBSD__
3115                         if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1)
3116 #else
3117                         if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
3118 #endif
3119                                 err(1, "host: asprintf");
3120                         if (($$ = host(buf)) == NULL)   {
3121                                 /* error. "any" is handled elsewhere */
3122                                 free(buf);
3123                                 yyerror("could not parse host specification");
3124                                 YYERROR;
3125                         }
3126                         free(buf);
3127                 }
3128                 | dynaddr
3129                 | dynaddr '/' NUMBER            {
3130                         struct node_host        *n;
3131
3132                         if ($3 < 0 || $3 > 128) {
3133                                 yyerror("bit number too big");
3134                                 YYERROR;
3135                         }
3136                         $$ = $1;
3137                         for (n = $1; n != NULL; n = n->next)
3138                                 set_ipmask(n, $3);
3139                 }
3140                 | '<' STRING '>'        {
3141                         if (strlen($2) >= PF_TABLE_NAME_SIZE) {
3142                                 yyerror("table name '%s' too long", $2);
3143                                 free($2);
3144                                 YYERROR;
3145                         }
3146                         $$ = calloc(1, sizeof(struct node_host));
3147                         if ($$ == NULL)
3148                                 err(1, "host: calloc");
3149                         $$->addr.type = PF_ADDR_TABLE;
3150                         if (strlcpy($$->addr.v.tblname, $2,
3151                             sizeof($$->addr.v.tblname)) >=
3152                             sizeof($$->addr.v.tblname))
3153                                 errx(1, "host: strlcpy");
3154                         free($2);
3155                         $$->next = NULL;
3156                         $$->tail = $$;
3157                 }
3158                 ;
3159
3160 number          : NUMBER
3161                 | STRING                {
3162                         u_long  ulval;
3163
3164                         if (atoul($1, &ulval) == -1) {
3165                                 yyerror("%s is not a number", $1);
3166                                 free($1);
3167                                 YYERROR;
3168                         } else
3169                                 $$ = ulval;
3170                         free($1);
3171                 }
3172                 ;
3173
3174 dynaddr         : '(' STRING ')'                {
3175                         int      flags = 0;
3176                         char    *p, *op;
3177
3178                         op = $2;
3179                         if (!isalpha(op[0])) {
3180                                 yyerror("invalid interface name '%s'", op);
3181                                 free(op);
3182                                 YYERROR;
3183                         }
3184                         while ((p = strrchr($2, ':')) != NULL) {
3185                                 if (!strcmp(p+1, "network"))
3186                                         flags |= PFI_AFLAG_NETWORK;
3187                                 else if (!strcmp(p+1, "broadcast"))
3188                                         flags |= PFI_AFLAG_BROADCAST;
3189                                 else if (!strcmp(p+1, "peer"))
3190                                         flags |= PFI_AFLAG_PEER;
3191                                 else if (!strcmp(p+1, "0"))
3192                                         flags |= PFI_AFLAG_NOALIAS;
3193                                 else {
3194                                         yyerror("interface %s has bad modifier",
3195                                             $2);
3196                                         free(op);
3197                                         YYERROR;
3198                                 }
3199                                 *p = '\0';
3200                         }
3201                         if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3202                                 free(op);
3203                                 yyerror("illegal combination of "
3204                                     "interface modifiers");
3205                                 YYERROR;
3206                         }
3207                         $$ = calloc(1, sizeof(struct node_host));
3208                         if ($$ == NULL)
3209                                 err(1, "address: calloc");
3210                         $$->af = 0;
3211                         set_ipmask($$, 128);
3212                         $$->addr.type = PF_ADDR_DYNIFTL;
3213                         $$->addr.iflags = flags;
3214                         if (strlcpy($$->addr.v.ifname, $2,
3215                             sizeof($$->addr.v.ifname)) >=
3216                             sizeof($$->addr.v.ifname)) {
3217                                 free(op);
3218                                 free($$);
3219                                 yyerror("interface name too long");
3220                                 YYERROR;
3221                         }
3222                         free(op);
3223                         $$->next = NULL;
3224                         $$->tail = $$;
3225                 }
3226                 ;
3227
3228 portspec        : port_item                     { $$ = $1; }
3229                 | '{' optnl port_list '}'       { $$ = $3; }
3230                 ;
3231
3232 port_list       : port_item optnl               { $$ = $1; }
3233                 | port_list comma port_item optnl       {
3234                         $1->tail->next = $3;
3235                         $1->tail = $3;
3236                         $$ = $1;
3237                 }
3238                 ;
3239
3240 port_item       : portrange                     {
3241                         $$ = calloc(1, sizeof(struct node_port));
3242                         if ($$ == NULL)
3243                                 err(1, "port_item: calloc");
3244                         $$->port[0] = $1.a;
3245                         $$->port[1] = $1.b;
3246                         if ($1.t)
3247                                 $$->op = PF_OP_RRG;
3248                         else
3249                                 $$->op = PF_OP_EQ;
3250                         $$->next = NULL;
3251                         $$->tail = $$;
3252                 }
3253                 | unaryop portrange     {
3254                         if ($2.t) {
3255                                 yyerror("':' cannot be used with an other "
3256                                     "port operator");
3257                                 YYERROR;
3258                         }
3259                         $$ = calloc(1, sizeof(struct node_port));
3260                         if ($$ == NULL)
3261                                 err(1, "port_item: calloc");
3262                         $$->port[0] = $2.a;
3263                         $$->port[1] = $2.b;
3264                         $$->op = $1;
3265                         $$->next = NULL;
3266                         $$->tail = $$;
3267                 }
3268                 | portrange PORTBINARY portrange        {
3269                         if ($1.t || $3.t) {
3270                                 yyerror("':' cannot be used with an other "
3271                                     "port operator");
3272                                 YYERROR;
3273                         }
3274                         $$ = calloc(1, sizeof(struct node_port));
3275                         if ($$ == NULL)
3276                                 err(1, "port_item: calloc");
3277                         $$->port[0] = $1.a;
3278                         $$->port[1] = $3.a;
3279                         $$->op = $2;
3280                         $$->next = NULL;
3281                         $$->tail = $$;
3282                 }
3283                 ;
3284
3285 portplain       : numberstring                  {
3286                         if (parseport($1, &$$, 0) == -1) {
3287                                 free($1);
3288                                 YYERROR;
3289                         }
3290                         free($1);
3291                 }
3292                 ;
3293
3294 portrange       : numberstring                  {
3295                         if (parseport($1, &$$, PPORT_RANGE) == -1) {
3296                                 free($1);
3297                                 YYERROR;
3298                         }
3299                         free($1);
3300                 }
3301                 ;
3302
3303 uids            : uid_item                      { $$ = $1; }
3304                 | '{' optnl uid_list '}'        { $$ = $3; }
3305                 ;
3306
3307 uid_list        : uid_item optnl                { $$ = $1; }
3308                 | uid_list comma uid_item optnl {
3309                         $1->tail->next = $3;
3310                         $1->tail = $3;
3311                         $$ = $1;
3312                 }
3313                 ;
3314
3315 uid_item        : uid                           {
3316                         $$ = calloc(1, sizeof(struct node_uid));
3317                         if ($$ == NULL)
3318                                 err(1, "uid_item: calloc");
3319                         $$->uid[0] = $1;
3320                         $$->uid[1] = $1;
3321                         $$->op = PF_OP_EQ;
3322                         $$->next = NULL;
3323                         $$->tail = $$;
3324                 }
3325                 | unaryop uid                   {
3326                         if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3327                                 yyerror("user unknown requires operator = or "
3328                                     "!=");
3329                                 YYERROR;
3330                         }
3331                         $$ = calloc(1, sizeof(struct node_uid));
3332                         if ($$ == NULL)
3333                                 err(1, "uid_item: calloc");
3334                         $$->uid[0] = $2;
3335                         $$->uid[1] = $2;
3336                         $$->op = $1;
3337                         $$->next = NULL;
3338                         $$->tail = $$;
3339                 }
3340                 | uid PORTBINARY uid            {
3341                         if ($1 == UID_MAX || $3 == UID_MAX) {
3342                                 yyerror("user unknown requires operator = or "
3343                                     "!=");
3344                                 YYERROR;
3345                         }
3346                         $$ = calloc(1, sizeof(struct node_uid));
3347                         if ($$ == NULL)
3348                                 err(1, "uid_item: calloc");
3349                         $$->uid[0] = $1;
3350                         $$->uid[1] = $3;
3351                         $$->op = $2;
3352                         $$->next = NULL;
3353                         $$->tail = $$;
3354                 }
3355                 ;
3356
3357 uid             : STRING                        {
3358                         if (!strcmp($1, "unknown"))
3359                                 $$ = UID_MAX;
3360                         else {
3361                                 struct passwd   *pw;
3362
3363                                 if ((pw = getpwnam($1)) == NULL) {
3364                                         yyerror("unknown user %s", $1);
3365                                         free($1);
3366                                         YYERROR;
3367                                 }
3368                                 $$ = pw->pw_uid;
3369                         }
3370                         free($1);
3371                 }
3372                 | NUMBER                        {
3373                         if ($1 < 0 || $1 >= UID_MAX) {
3374                                 yyerror("illegal uid value %lu", $1);
3375                                 YYERROR;
3376                         }
3377                         $$ = $1;
3378                 }
3379                 ;
3380
3381 gids            : gid_item                      { $$ = $1; }
3382                 | '{' optnl gid_list '}'        { $$ = $3; }
3383                 ;
3384
3385 gid_list        : gid_item optnl                { $$ = $1; }
3386                 | gid_list comma gid_item optnl {
3387                         $1->tail->next = $3;
3388                         $1->tail = $3;
3389                         $$ = $1;
3390                 }
3391                 ;
3392
3393 gid_item        : gid                           {
3394                         $$ = calloc(1, sizeof(struct node_gid));
3395                         if ($$ == NULL)
3396                                 err(1, "gid_item: calloc");
3397                         $$->gid[0] = $1;
3398                         $$->gid[1] = $1;
3399                         $$->op = PF_OP_EQ;
3400                         $$->next = NULL;
3401                         $$->tail = $$;
3402                 }
3403                 | unaryop gid                   {
3404                         if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3405                                 yyerror("group unknown requires operator = or "
3406                                     "!=");
3407                                 YYERROR;
3408                         }
3409                         $$ = calloc(1, sizeof(struct node_gid));
3410                         if ($$ == NULL)
3411                                 err(1, "gid_item: calloc");
3412                         $$->gid[0] = $2;
3413                         $$->gid[1] = $2;
3414                         $$->op = $1;
3415                         $$->next = NULL;
3416                         $$->tail = $$;
3417                 }
3418                 | gid PORTBINARY gid            {
3419                         if ($1 == GID_MAX || $3 == GID_MAX) {
3420                                 yyerror("group unknown requires operator = or "
3421                                     "!=");
3422                                 YYERROR;
3423                         }
3424                         $$ = calloc(1, sizeof(struct node_gid));
3425                         if ($$ == NULL)
3426                                 err(1, "gid_item: calloc");
3427                         $$->gid[0] = $1;
3428                         $$->gid[1] = $3;
3429                         $$->op = $2;
3430                         $$->next = NULL;
3431                         $$->tail = $$;
3432                 }
3433                 ;
3434
3435 gid             : STRING                        {
3436                         if (!strcmp($1, "unknown"))
3437                                 $$ = GID_MAX;
3438                         else {
3439                                 struct group    *grp;
3440
3441                                 if ((grp = getgrnam($1)) == NULL) {
3442                                         yyerror("unknown group %s", $1);
3443                                         free($1);
3444                                         YYERROR;
3445                                 }
3446                                 $$ = grp->gr_gid;
3447                         }
3448                         free($1);
3449                 }
3450                 | NUMBER                        {
3451                         if ($1 < 0 || $1 >= GID_MAX) {
3452                                 yyerror("illegal gid value %lu", $1);
3453                                 YYERROR;
3454                         }
3455                         $$ = $1;
3456                 }
3457                 ;
3458
3459 flag            : STRING                        {
3460                         int     f;
3461
3462                         if ((f = parse_flags($1)) < 0) {
3463                                 yyerror("bad flags %s", $1);
3464                                 free($1);
3465                                 YYERROR;
3466                         }
3467                         free($1);
3468                         $$.b1 = f;
3469                 }
3470                 ;
3471
3472 flags           : FLAGS flag '/' flag   { $$.b1 = $2.b1; $$.b2 = $4.b1; }
3473                 | FLAGS '/' flag        { $$.b1 = 0; $$.b2 = $3.b1; }
3474                 | FLAGS ANY             { $$.b1 = 0; $$.b2 = 0; }
3475                 ;
3476
3477 icmpspec        : ICMPTYPE icmp_item                    { $$ = $2; }
3478                 | ICMPTYPE '{' optnl icmp_list '}'      { $$ = $4; }
3479                 | ICMP6TYPE icmp6_item                  { $$ = $2; }
3480                 | ICMP6TYPE '{' optnl icmp6_list '}'    { $$ = $4; }
3481                 ;
3482
3483 icmp_list       : icmp_item optnl               { $$ = $1; }
3484                 | icmp_list comma icmp_item optnl {
3485                         $1->tail->next = $3;
3486                         $1->tail = $3;
3487                         $$ = $1;
3488                 }
3489                 ;
3490
3491 icmp6_list      : icmp6_item optnl              { $$ = $1; }
3492                 | icmp6_list comma icmp6_item optnl {
3493                         $1->tail->next = $3;
3494                         $1->tail = $3;
3495                         $$ = $1;
3496                 }
3497                 ;
3498
3499 icmp_item       : icmptype              {
3500                         $$ = calloc(1, sizeof(struct node_icmp));
3501                         if ($$ == NULL)
3502                                 err(1, "icmp_item: calloc");
3503                         $$->type = $1;
3504                         $$->code = 0;
3505                         $$->proto = IPPROTO_ICMP;
3506                         $$->next = NULL;
3507                         $$->tail = $$;
3508                 }
3509                 | icmptype CODE STRING  {
3510                         const struct icmpcodeent        *p;
3511
3512                         if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3513                                 yyerror("unknown icmp-code %s", $3);
3514                                 free($3);
3515                                 YYERROR;
3516                         }
3517
3518                         free($3);
3519                         $$ = calloc(1, sizeof(struct node_icmp));
3520                         if ($$ == NULL)
3521                                 err(1, "icmp_item: calloc");
3522                         $$->type = $1;
3523                         $$->code = p->code + 1;
3524                         $$->proto = IPPROTO_ICMP;
3525                         $$->next = NULL;
3526                         $$->tail = $$;
3527                 }
3528                 | icmptype CODE NUMBER  {
3529                         if ($3 < 0 || $3 > 255) {
3530                                 yyerror("illegal icmp-code %lu", $3);
3531                                 YYERROR;
3532                         }
3533                         $$ = calloc(1, sizeof(struct node_icmp));
3534                         if ($$ == NULL)
3535                                 err(1, "icmp_item: calloc");
3536                         $$->type = $1;
3537                         $$->code = $3 + 1;
3538                         $$->proto = IPPROTO_ICMP;
3539                         $$->next = NULL;
3540                         $$->tail = $$;
3541                 }
3542                 ;
3543
3544 icmp6_item      : icmp6type             {
3545                         $$ = calloc(1, sizeof(struct node_icmp));
3546                         if ($$ == NULL)
3547                                 err(1, "icmp_item: calloc");
3548                         $$->type = $1;
3549                         $$->code = 0;
3550                         $$->proto = IPPROTO_ICMPV6;
3551                         $$->next = NULL;
3552                         $$->tail = $$;
3553                 }
3554                 | icmp6type CODE STRING {
3555                         const struct icmpcodeent        *p;
3556
3557                         if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3558                                 yyerror("unknown icmp6-code %s", $3);
3559                                 free($3);
3560                                 YYERROR;
3561                         }
3562                         free($3);
3563
3564                         $$ = calloc(1, sizeof(struct node_icmp));
3565                         if ($$ == NULL)
3566                                 err(1, "icmp_item: calloc");
3567                         $$->type = $1;
3568                         $$->code = p->code + 1;
3569                         $$->proto = IPPROTO_ICMPV6;
3570                         $$->next = NULL;
3571                         $$->tail = $$;
3572                 }
3573                 | icmp6type CODE NUMBER {
3574                         if ($3 < 0 || $3 > 255) {
3575                                 yyerror("illegal icmp-code %lu", $3);
3576                                 YYERROR;
3577                         }
3578                         $$ = calloc(1, sizeof(struct node_icmp));
3579                         if ($$ == NULL)
3580                                 err(1, "icmp_item: calloc");
3581                         $$->type = $1;
3582                         $$->code = $3 + 1;
3583                         $$->proto = IPPROTO_ICMPV6;
3584                         $$->next = NULL;
3585                         $$->tail = $$;
3586                 }
3587                 ;
3588
3589 icmptype        : STRING                        {
3590                         const struct icmptypeent        *p;
3591
3592                         if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3593                                 yyerror("unknown icmp-type %s", $1);
3594                                 free($1);
3595                                 YYERROR;
3596                         }
3597                         $$ = p->type + 1;
3598                         free($1);
3599                 }
3600                 | NUMBER                        {
3601                         if ($1 < 0 || $1 > 255) {
3602                                 yyerror("illegal icmp-type %lu", $1);
3603                                 YYERROR;
3604                         }
3605                         $$ = $1 + 1;
3606                 }
3607                 ;
3608
3609 icmp6type       : STRING                        {
3610                         const struct icmptypeent        *p;
3611
3612                         if ((p = geticmptypebyname($1, AF_INET6)) ==
3613                             NULL) {
3614                                 yyerror("unknown icmp6-type %s", $1);
3615                                 free($1);
3616                                 YYERROR;
3617                         }
3618                         $$ = p->type + 1;
3619                         free($1);
3620                 }
3621                 | NUMBER                        {
3622                         if ($1 < 0 || $1 > 255) {
3623                                 yyerror("illegal icmp6-type %lu", $1);
3624                                 YYERROR;
3625                         }
3626                         $$ = $1 + 1;
3627                 }
3628                 ;
3629
3630 tos     : STRING                        {
3631                         int val;
3632                         char *end;
3633
3634                         if (map_tos($1, &val))
3635                                 $$ = val;
3636                         else if ($1[0] == '0' && $1[1] == 'x') {
3637                                 errno = 0;
3638                                 $$ = strtoul($1, &end, 16);
3639                                 if (errno || *end != '\0')
3640                                         $$ = 256;
3641                         } else
3642                                 $$ = 256;               /* flag bad argument */
3643                         if ($$ < 0 || $$ > 255) {
3644                                 yyerror("illegal tos value %s", $1);
3645                                 free($1);
3646                                 YYERROR;
3647                         }
3648                         free($1);
3649                 }
3650                 | NUMBER                        {
3651                         $$ = $1;
3652                         if ($$ < 0 || $$ > 255) {
3653                                 yyerror("illegal tos value %s", $1);
3654                                 YYERROR;
3655                         }
3656                 }
3657                 ;
3658
3659 sourcetrack     : SOURCETRACK           { $$ = PF_SRCTRACK; }
3660                 | SOURCETRACK GLOBAL    { $$ = PF_SRCTRACK_GLOBAL; }
3661                 | SOURCETRACK RULE      { $$ = PF_SRCTRACK_RULE; }
3662                 ;
3663
3664 statelock       : IFBOUND {
3665                         $$ = PFRULE_IFBOUND;
3666                 }
3667                 | FLOATING {
3668                         $$ = 0;
3669                 }
3670                 ;
3671
3672 keep            : NO STATE                      {
3673                         $$.action = 0;
3674                         $$.options = NULL;
3675                 }
3676                 | KEEP STATE state_opt_spec     {
3677                         $$.action = PF_STATE_NORMAL;
3678                         $$.options = $3;
3679                 }
3680                 | MODULATE STATE state_opt_spec {
3681                         $$.action = PF_STATE_MODULATE;
3682                         $$.options = $3;
3683                 }
3684                 | SYNPROXY STATE state_opt_spec {
3685                         $$.action = PF_STATE_SYNPROXY;
3686                         $$.options = $3;
3687                 }
3688                 ;
3689
3690 flush           : /* empty */                   { $$ = 0; }
3691                 | FLUSH                         { $$ = PF_FLUSH; }
3692                 | FLUSH GLOBAL                  {
3693                         $$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3694                 }
3695                 ;
3696
3697 state_opt_spec  : '(' state_opt_list ')'        { $$ = $2; }
3698                 | /* empty */                   { $$ = NULL; }
3699                 ;
3700
3701 state_opt_list  : state_opt_item                { $$ = $1; }
3702                 | state_opt_list comma state_opt_item {
3703                         $1->tail->next = $3;
3704                         $1->tail = $3;
3705                         $$ = $1;
3706                 }
3707                 ;
3708
3709 state_opt_item  : MAXIMUM NUMBER                {
3710                         if ($2 < 0 || $2 > UINT_MAX) {
3711                                 yyerror("only positive values permitted");
3712                                 YYERROR;
3713                         }
3714                         $$ = calloc(1, sizeof(struct node_state_opt));
3715                         if ($$ == NULL)
3716                                 err(1, "state_opt_item: calloc");
3717                         $$->type = PF_STATE_OPT_MAX;
3718                         $$->data.max_states = $2;
3719                         $$->next = NULL;
3720                         $$->tail = $$;
3721                 }
3722                 | NOSYNC                                {
3723                         $$ = calloc(1, sizeof(struct node_state_opt));
3724                         if ($$ == NULL)
3725                                 err(1, "state_opt_item: calloc");
3726                         $$->type = PF_STATE_OPT_NOSYNC;
3727                         $$->next = NULL;
3728                         $$->tail = $$;
3729                 }
3730                 | MAXSRCSTATES NUMBER                   {
3731                         if ($2 < 0 || $2 > UINT_MAX) {
3732                                 yyerror("only positive values permitted");
3733                                 YYERROR;
3734                         }
3735                         $$ = calloc(1, sizeof(struct node_state_opt));
3736                         if ($$ == NULL)
3737                                 err(1, "state_opt_item: calloc");
3738                         $$->type = PF_STATE_OPT_MAX_SRC_STATES;
3739                         $$->data.max_src_states = $2;
3740                         $$->next = NULL;
3741                         $$->tail = $$;
3742                 }
3743                 | MAXSRCCONN NUMBER                     {
3744                         if ($2 < 0 || $2 > UINT_MAX) {
3745                                 yyerror("only positive values permitted");
3746                                 YYERROR;
3747                         }
3748                         $$ = calloc(1, sizeof(struct node_state_opt));
3749                         if ($$ == NULL)
3750                                 err(1, "state_opt_item: calloc");
3751                         $$->type = PF_STATE_OPT_MAX_SRC_CONN;
3752                         $$->data.max_src_conn = $2;
3753                         $$->next = NULL;
3754                         $$->tail = $$;
3755                 }
3756                 | MAXSRCCONNRATE NUMBER '/' NUMBER      {
3757                         if ($2 < 0 || $2 > UINT_MAX ||
3758                             $4 < 0 || $4 > UINT_MAX) {
3759                                 yyerror("only positive values permitted");
3760                                 YYERROR;
3761                         }
3762                         $$ = calloc(1, sizeof(struct node_state_opt));
3763                         if ($$ == NULL)
3764                                 err(1, "state_opt_item: calloc");
3765                         $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3766                         $$->data.max_src_conn_rate.limit = $2;
3767                         $$->data.max_src_conn_rate.seconds = $4;
3768                         $$->next = NULL;
3769                         $$->tail = $$;
3770                 }
3771                 | OVERLOAD '<' STRING '>' flush         {
3772                         if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3773                                 yyerror("table name '%s' too long", $3);
3774                                 free($3);
3775                                 YYERROR;
3776                         }
3777                         $$ = calloc(1, sizeof(struct node_state_opt));
3778                         if ($$ == NULL)
3779                                 err(1, "state_opt_item: calloc");
3780                         if (strlcpy($$->data.overload.tblname, $3,
3781                             PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3782                                 errx(1, "state_opt_item: strlcpy");
3783                         free($3);
3784                         $$->type = PF_STATE_OPT_OVERLOAD;
3785                         $$->data.overload.flush = $5;
3786                         $$->next = NULL;
3787                         $$->tail = $$;
3788                 }
3789                 | MAXSRCNODES NUMBER                    {
3790                         if ($2 < 0 || $2 > UINT_MAX) {
3791                                 yyerror("only positive values permitted");
3792                                 YYERROR;
3793                         }
3794                         $$ = calloc(1, sizeof(struct node_state_opt));
3795                         if ($$ == NULL)
3796                                 err(1, "state_opt_item: calloc");
3797                         $$->type = PF_STATE_OPT_MAX_SRC_NODES;
3798                         $$->data.max_src_nodes = $2;
3799                         $$->next = NULL;
3800                         $$->tail = $$;
3801                 }
3802                 | sourcetrack {
3803                         $$ = calloc(1, sizeof(struct node_state_opt));
3804                         if ($$ == NULL)
3805                                 err(1, "state_opt_item: calloc");
3806                         $$->type = PF_STATE_OPT_SRCTRACK;
3807                         $$->data.src_track = $1;
3808                         $$->next = NULL;
3809                         $$->tail = $$;
3810                 }
3811                 | statelock {
3812                         $$ = calloc(1, sizeof(struct node_state_opt));
3813                         if ($$ == NULL)
3814                                 err(1, "state_opt_item: calloc");
3815                         $$->type = PF_STATE_OPT_STATELOCK;
3816                         $$->data.statelock = $1;
3817                         $$->next = NULL;
3818                         $$->tail = $$;
3819                 }
3820                 | SLOPPY {
3821                         $$ = calloc(1, sizeof(struct node_state_opt));
3822                         if ($$ == NULL)
3823                                 err(1, "state_opt_item: calloc");
3824                         $$->type = PF_STATE_OPT_SLOPPY;
3825                         $$->next = NULL;
3826                         $$->tail = $$;
3827                 }
3828                 | STRING NUMBER                 {
3829                         int     i;
3830
3831                         if ($2 < 0 || $2 > UINT_MAX) {
3832                                 yyerror("only positive values permitted");
3833                                 YYERROR;
3834                         }
3835                         for (i = 0; pf_timeouts[i].name &&
3836                             strcmp(pf_timeouts[i].name, $1); ++i)
3837                                 ;       /* nothing */
3838                         if (!pf_timeouts[i].name) {
3839                                 yyerror("illegal timeout name %s", $1);
3840                                 free($1);
3841                                 YYERROR;
3842                         }
3843                         if (strchr(pf_timeouts[i].name, '.') == NULL) {
3844                                 yyerror("illegal state timeout %s", $1);
3845                                 free($1);
3846                                 YYERROR;
3847                         }
3848                         free($1);
3849                         $$ = calloc(1, sizeof(struct node_state_opt));
3850                         if ($$ == NULL)
3851                                 err(1, "state_opt_item: calloc");
3852                         $$->type = PF_STATE_OPT_TIMEOUT;
3853                         $$->data.timeout.number = pf_timeouts[i].timeout;
3854                         $$->data.timeout.seconds = $2;
3855                         $$->next = NULL;
3856                         $$->tail = $$;
3857                 }
3858                 ;
3859
3860 label           : LABEL STRING                  {
3861                         $$ = $2;
3862                 }
3863                 ;
3864
3865 qname           : QUEUE STRING                          {
3866                         $$.qname = $2;
3867                         $$.pqname = NULL;
3868                 }
3869                 | QUEUE '(' STRING ')'                  {
3870                         $$.qname = $3;
3871                         $$.pqname = NULL;
3872                 }
3873                 | QUEUE '(' STRING comma STRING ')'     {
3874                         $$.qname = $3;
3875                         $$.pqname = $5;
3876                 }
3877                 ;
3878
3879 no              : /* empty */                   { $$ = 0; }
3880                 | NO                            { $$ = 1; }
3881                 ;
3882
3883 portstar        : numberstring                  {
3884                         if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3885                                 free($1);
3886                                 YYERROR;
3887                         }
3888                         free($1);
3889                 }
3890                 ;
3891
3892 redirspec       : host                          { $$ = $1; }
3893                 | '{' optnl redir_host_list '}' { $$ = $3; }
3894                 ;
3895
3896 redir_host_list : host optnl                    { $$ = $1; }
3897                 | redir_host_list comma host optnl {
3898                         $1->tail->next = $3;
3899                         $1->tail = $3->tail;
3900                         $$ = $1;
3901                 }
3902                 ;
3903
3904 redirpool       : /* empty */                   { $$ = NULL; }
3905                 | ARROW redirspec               {
3906                         $$ = calloc(1, sizeof(struct redirection));
3907                         if ($$ == NULL)
3908                                 err(1, "redirection: calloc");
3909                         $$->host = $2;
3910                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
3911                 }
3912                 | ARROW redirspec PORT portstar {
3913                         $$ = calloc(1, sizeof(struct redirection));
3914                         if ($$ == NULL)
3915                                 err(1, "redirection: calloc");
3916                         $$->host = $2;
3917                         $$->rport = $4;
3918                 }
3919                 ;
3920
3921 hashkey         : /* empty */
3922                 {
3923                         $$ = calloc(1, sizeof(struct pf_poolhashkey));
3924                         if ($$ == NULL)
3925                                 err(1, "hashkey: calloc");
3926                         $$->key32[0] = arc4random();
3927                         $$->key32[1] = arc4random();
3928                         $$->key32[2] = arc4random();
3929                         $$->key32[3] = arc4random();
3930                 }
3931                 | string
3932                 {
3933                         if (!strncmp($1, "0x", 2)) {
3934                                 if (strlen($1) != 34) {
3935                                         free($1);
3936                                         yyerror("hex key must be 128 bits "
3937                                                 "(32 hex digits) long");
3938                                         YYERROR;
3939                                 }
3940                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3941                                 if ($$ == NULL)
3942                                         err(1, "hashkey: calloc");
3943
3944                                 if (sscanf($1, "0x%8x%8x%8x%8x",
3945                                     &$$->key32[0], &$$->key32[1],
3946                                     &$$->key32[2], &$$->key32[3]) != 4) {
3947                                         free($$);
3948                                         free($1);
3949                                         yyerror("invalid hex key");
3950                                         YYERROR;
3951                                 }
3952                         } else {
3953                                 MD5_CTX context;
3954
3955                                 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3956                                 if ($$ == NULL)
3957                                         err(1, "hashkey: calloc");
3958                                 MD5Init(&context);
3959                                 MD5Update(&context, (unsigned char *)$1,
3960                                     strlen($1));
3961                                 MD5Final((unsigned char *)$$, &context);
3962                                 HTONL($$->key32[0]);
3963                                 HTONL($$->key32[1]);
3964                                 HTONL($$->key32[2]);
3965                                 HTONL($$->key32[3]);
3966                         }
3967                         free($1);
3968                 }
3969                 ;
3970
3971 pool_opts       :       { bzero(&pool_opts, sizeof pool_opts); }
3972                     pool_opts_l
3973                         { $$ = pool_opts; }
3974                 | /* empty */   {
3975                         bzero(&pool_opts, sizeof pool_opts);
3976                         $$ = pool_opts;
3977                 }
3978                 ;
3979
3980 pool_opts_l     : pool_opts_l pool_opt
3981                 | pool_opt
3982                 ;
3983
3984 pool_opt        : BITMASK       {
3985                         if (pool_opts.type) {
3986                                 yyerror("pool type cannot be redefined");
3987                                 YYERROR;
3988                         }
3989                         pool_opts.type =  PF_POOL_BITMASK;
3990                 }
3991                 | RANDOM        {
3992                         if (pool_opts.type) {
3993                                 yyerror("pool type cannot be redefined");
3994                                 YYERROR;
3995                         }
3996                         pool_opts.type = PF_POOL_RANDOM;
3997                 }
3998                 | SOURCEHASH hashkey {
3999                         if (pool_opts.type) {
4000                                 yyerror("pool type cannot be redefined");
4001                                 YYERROR;
4002                         }
4003                         pool_opts.type = PF_POOL_SRCHASH;
4004                         pool_opts.key = $2;
4005                 }
4006                 | ROUNDROBIN    {
4007                         if (pool_opts.type) {
4008                                 yyerror("pool type cannot be redefined");
4009                                 YYERROR;
4010                         }
4011                         pool_opts.type = PF_POOL_ROUNDROBIN;
4012                 }
4013                 | STATICPORT    {
4014                         if (pool_opts.staticport) {
4015                                 yyerror("static-port cannot be redefined");
4016                                 YYERROR;
4017                         }
4018                         pool_opts.staticport = 1;
4019                 }
4020                 | STICKYADDRESS {
4021                         if (filter_opts.marker & POM_STICKYADDRESS) {
4022                                 yyerror("sticky-address cannot be redefined");
4023                                 YYERROR;
4024                         }
4025                         pool_opts.marker |= POM_STICKYADDRESS;
4026                         pool_opts.opts |= PF_POOL_STICKYADDR;
4027                 }
4028                 | MAPEPORTSET number '/' number '/' number {
4029                         if (pool_opts.mape.offset) {
4030                                 yyerror("map-e-portset cannot be redefined");
4031                                 YYERROR;
4032                         }
4033                         if (pool_opts.type) {
4034                                 yyerror("map-e-portset cannot be used with "
4035                                         "address pools");
4036                                 YYERROR;
4037                         }
4038                         if ($2 <= 0 || $2 >= 16) {
4039                                 yyerror("MAP-E PSID offset must be 1-15");
4040                                 YYERROR;
4041                         }
4042                         if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) {
4043                                 yyerror("Invalid MAP-E PSID length");
4044                                 YYERROR;
4045                         } else if ($4 == 0) {
4046                                 yyerror("PSID Length = 0: this means"
4047                                     " you do not need MAP-E");
4048                                 YYERROR;
4049                         }
4050                         if ($6 < 0 || $6 > 65535) {
4051                                 yyerror("Invalid MAP-E PSID");
4052                                 YYERROR;
4053                         }
4054                         pool_opts.mape.offset = $2;
4055                         pool_opts.mape.psidlen = $4;
4056                         pool_opts.mape.psid = $6;
4057                 }
4058                 ;
4059
4060 redirection     : /* empty */                   { $$ = NULL; }
4061                 | ARROW host                    {
4062                         $$ = calloc(1, sizeof(struct redirection));
4063                         if ($$ == NULL)
4064                                 err(1, "redirection: calloc");
4065                         $$->host = $2;
4066                         $$->rport.a = $$->rport.b = $$->rport.t = 0;
4067                 }
4068                 | ARROW host PORT portstar      {
4069                         $$ = calloc(1, sizeof(struct redirection));
4070                         if ($$ == NULL)
4071                                 err(1, "redirection: calloc");
4072                         $$->host = $2;
4073                         $$->rport = $4;
4074                 }
4075                 ;
4076
4077 natpasslog      : /* empty */   { $$.b1 = $$.b2 = 0; $$.w2 = 0; }
4078                 | PASS          { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
4079                 | PASS log      { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
4080                 | log           { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
4081                 ;
4082
4083 nataction       : no NAT natpasslog {
4084                         if ($1 && $3.b1) {
4085                                 yyerror("\"pass\" not valid with \"no\"");
4086                                 YYERROR;
4087                         }
4088                         if ($1)
4089                                 $$.b1 = PF_NONAT;
4090                         else
4091                                 $$.b1 = PF_NAT;
4092                         $$.b2 = $3.b1;
4093                         $$.w = $3.b2;
4094                         $$.w2 = $3.w2;
4095                 }
4096                 | no RDR natpasslog {
4097                         if ($1 && $3.b1) {
4098                                 yyerror("\"pass\" not valid with \"no\"");
4099                                 YYERROR;
4100                         }
4101                         if ($1)
4102                                 $$.b1 = PF_NORDR;
4103                         else
4104                                 $$.b1 = PF_RDR;
4105                         $$.b2 = $3.b1;
4106                         $$.w = $3.b2;
4107                         $$.w2 = $3.w2;
4108                 }
4109                 ;
4110
4111 natrule         : nataction interface af proto fromto tag tagged rtable
4112                     redirpool pool_opts
4113                 {
4114                         struct pfctl_rule       r;
4115
4116                         if (check_rulestate(PFCTL_STATE_NAT))
4117                                 YYERROR;
4118
4119                         memset(&r, 0, sizeof(r));
4120
4121                         r.action = $1.b1;
4122                         r.natpass = $1.b2;
4123                         r.log = $1.w;
4124                         r.logif = $1.w2;
4125                         r.af = $3;
4126
4127                         if (!r.af) {
4128                                 if ($5.src.host && $5.src.host->af &&
4129                                     !$5.src.host->ifindex)
4130                                         r.af = $5.src.host->af;
4131                                 else if ($5.dst.host && $5.dst.host->af &&
4132                                     !$5.dst.host->ifindex)
4133                                         r.af = $5.dst.host->af;
4134                         }
4135
4136                         if ($6 != NULL)
4137                                 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
4138                                     PF_TAG_NAME_SIZE) {
4139                                         yyerror("tag too long, max %u chars",
4140                                             PF_TAG_NAME_SIZE - 1);
4141                                         YYERROR;
4142                                 }
4143
4144                         if ($7.name)
4145                                 if (strlcpy(r.match_tagname, $7.name,
4146                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4147                                         yyerror("tag too long, max %u chars",
4148                                             PF_TAG_NAME_SIZE - 1);
4149                                         YYERROR;
4150                                 }
4151                         r.match_tag_not = $7.neg;
4152                         r.rtableid = $8;
4153
4154                         if (r.action == PF_NONAT || r.action == PF_NORDR) {
4155                                 if ($9 != NULL) {
4156                                         yyerror("translation rule with 'no' "
4157                                             "does not need '->'");
4158                                         YYERROR;
4159                                 }
4160                         } else {
4161                                 if ($9 == NULL || $9->host == NULL) {
4162                                         yyerror("translation rule requires '-> "
4163                                             "address'");
4164                                         YYERROR;
4165                                 }
4166                                 if (!r.af && ! $9->host->ifindex)
4167                                         r.af = $9->host->af;
4168
4169                                 remove_invalid_hosts(&$9->host, &r.af);
4170                                 if (invalid_redirect($9->host, r.af))
4171                                         YYERROR;
4172                                 if (check_netmask($9->host, r.af))
4173                                         YYERROR;
4174
4175                                 r.rpool.proxy_port[0] = ntohs($9->rport.a);
4176
4177                                 switch (r.action) {
4178                                 case PF_RDR:
4179                                         if (!$9->rport.b && $9->rport.t &&
4180                                             $5.dst.port != NULL) {
4181                                                 r.rpool.proxy_port[1] =
4182                                                     ntohs($9->rport.a) +
4183                                                     (ntohs(
4184                                                     $5.dst.port->port[1]) -
4185                                                     ntohs(
4186                                                     $5.dst.port->port[0]));
4187                                         } else
4188                                                 r.rpool.proxy_port[1] =
4189                                                     ntohs($9->rport.b);
4190                                         break;
4191                                 case PF_NAT:
4192                                         r.rpool.proxy_port[1] =
4193                                             ntohs($9->rport.b);
4194                                         if (!r.rpool.proxy_port[0] &&
4195                                             !r.rpool.proxy_port[1]) {
4196                                                 r.rpool.proxy_port[0] =
4197                                                     PF_NAT_PROXY_PORT_LOW;
4198                                                 r.rpool.proxy_port[1] =
4199                                                     PF_NAT_PROXY_PORT_HIGH;
4200                                         } else if (!r.rpool.proxy_port[1])
4201                                                 r.rpool.proxy_port[1] =
4202                                                     r.rpool.proxy_port[0];
4203                                         break;
4204                                 default:
4205                                         break;
4206                                 }
4207
4208                                 r.rpool.opts = $10.type;
4209                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
4210                                     PF_POOL_NONE && ($9->host->next != NULL ||
4211                                     $9->host->addr.type == PF_ADDR_TABLE ||
4212                                     DYNIF_MULTIADDR($9->host->addr)))
4213                                         r.rpool.opts = PF_POOL_ROUNDROBIN;
4214                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4215                                     PF_POOL_ROUNDROBIN &&
4216                                     disallow_table($9->host, "tables are only "
4217                                     "supported in round-robin redirection "
4218                                     "pools"))
4219                                         YYERROR;
4220                                 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4221                                     PF_POOL_ROUNDROBIN &&
4222                                     disallow_alias($9->host, "interface (%s) "
4223                                     "is only supported in round-robin "
4224                                     "redirection pools"))
4225                                         YYERROR;
4226                                 if ($9->host->next != NULL) {
4227                                         if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4228                                             PF_POOL_ROUNDROBIN) {
4229                                                 yyerror("only round-robin "
4230                                                     "valid for multiple "
4231                                                     "redirection addresses");
4232                                                 YYERROR;
4233                                         }
4234                                 }
4235                         }
4236
4237                         if ($10.key != NULL)
4238                                 memcpy(&r.rpool.key, $10.key,
4239                                     sizeof(struct pf_poolhashkey));
4240
4241                          if ($10.opts)
4242                                 r.rpool.opts |= $10.opts;
4243
4244                         if ($10.staticport) {
4245                                 if (r.action != PF_NAT) {
4246                                         yyerror("the 'static-port' option is "
4247                                             "only valid with nat rules");
4248                                         YYERROR;
4249                                 }
4250                                 if (r.rpool.proxy_port[0] !=
4251                                     PF_NAT_PROXY_PORT_LOW &&
4252                                     r.rpool.proxy_port[1] !=
4253                                     PF_NAT_PROXY_PORT_HIGH) {
4254                                         yyerror("the 'static-port' option can't"
4255                                             " be used when specifying a port"
4256                                             " range");
4257                                         YYERROR;
4258                                 }
4259                                 r.rpool.proxy_port[0] = 0;
4260                                 r.rpool.proxy_port[1] = 0;
4261                         }
4262
4263                         if ($10.mape.offset) {
4264                                 if (r.action != PF_NAT) {
4265                                         yyerror("the 'map-e-portset' option is"
4266                                             " only valid with nat rules");
4267                                         YYERROR;
4268                                 }
4269                                 if ($10.staticport) {
4270                                         yyerror("the 'map-e-portset' option"
4271                                             " can't be used 'static-port'");
4272                                         YYERROR;
4273                                 }
4274                                 if (r.rpool.proxy_port[0] !=
4275                                     PF_NAT_PROXY_PORT_LOW &&
4276                                     r.rpool.proxy_port[1] !=
4277                                     PF_NAT_PROXY_PORT_HIGH) {
4278                                         yyerror("the 'map-e-portset' option"
4279                                             " can't be used when specifying"
4280                                             " a port range");
4281                                         YYERROR;
4282                                 }
4283                                 r.rpool.mape = $10.mape;
4284                         }
4285
4286                         expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
4287                             $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
4288                             $5.dst.port, 0, 0, 0, "");
4289                         free($9);
4290                 }
4291                 ;
4292
4293 binatrule       : no BINAT natpasslog interface af proto FROM ipspec toipspec tag
4294                     tagged rtable redirection
4295                 {
4296                         struct pfctl_rule       binat;
4297                         struct pf_pooladdr      *pa;
4298
4299                         if (check_rulestate(PFCTL_STATE_NAT))
4300                                 YYERROR;
4301                         if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
4302                             "permitted as a binat destination"))
4303                                 YYERROR;
4304
4305                         memset(&binat, 0, sizeof(binat));
4306
4307                         if ($1 && $3.b1) {
4308                                 yyerror("\"pass\" not valid with \"no\"");
4309                                 YYERROR;
4310                         }
4311                         if ($1)
4312                                 binat.action = PF_NOBINAT;
4313                         else
4314                                 binat.action = PF_BINAT;
4315                         binat.natpass = $3.b1;
4316                         binat.log = $3.b2;
4317                         binat.logif = $3.w2;
4318                         binat.af = $5;
4319                         if (!binat.af && $8 != NULL && $8->af)
4320                                 binat.af = $8->af;
4321                         if (!binat.af && $9 != NULL && $9->af)
4322                                 binat.af = $9->af;
4323
4324                         if (!binat.af && $13 != NULL && $13->host)
4325                                 binat.af = $13->host->af;
4326                         if (!binat.af) {
4327                                 yyerror("address family (inet/inet6) "
4328                                     "undefined");
4329                                 YYERROR;
4330                         }
4331
4332                         if ($4 != NULL) {
4333                                 memcpy(binat.ifname, $4->ifname,
4334                                     sizeof(binat.ifname));
4335                                 binat.ifnot = $4->not;
4336                                 free($4);
4337                         }
4338
4339                         if ($10 != NULL)
4340                                 if (strlcpy(binat.tagname, $10,
4341                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4342                                         yyerror("tag too long, max %u chars",
4343                                             PF_TAG_NAME_SIZE - 1);
4344                                         YYERROR;
4345                                 }
4346                         if ($11.name)
4347                                 if (strlcpy(binat.match_tagname, $11.name,
4348                                     PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4349                                         yyerror("tag too long, max %u chars",
4350                                             PF_TAG_NAME_SIZE - 1);
4351                                         YYERROR;
4352                                 }
4353                         binat.match_tag_not = $11.neg;
4354                         binat.rtableid = $12;
4355
4356                         if ($6 != NULL) {
4357                                 binat.proto = $6->proto;
4358                                 free($6);
4359                         }
4360
4361                         if ($8 != NULL && disallow_table($8, "invalid use of "
4362                             "table <%s> as the source address of a binat rule"))
4363                                 YYERROR;
4364                         if ($8 != NULL && disallow_alias($8, "invalid use of "
4365                             "interface (%s) as the source address of a binat "
4366                             "rule"))
4367                                 YYERROR;
4368                         if ($13 != NULL && $13->host != NULL && disallow_table(
4369                             $13->host, "invalid use of table <%s> as the "
4370                             "redirect address of a binat rule"))
4371                                 YYERROR;
4372                         if ($13 != NULL && $13->host != NULL && disallow_alias(
4373                             $13->host, "invalid use of interface (%s) as the "
4374                             "redirect address of a binat rule"))
4375                                 YYERROR;
4376
4377                         if ($8 != NULL) {
4378                                 if ($8->next) {
4379                                         yyerror("multiple binat ip addresses");
4380                                         YYERROR;
4381                                 }
4382                                 if ($8->addr.type == PF_ADDR_DYNIFTL)
4383                                         $8->af = binat.af;
4384                                 if ($8->af != binat.af) {
4385                                         yyerror("binat ip versions must match");
4386                                         YYERROR;
4387                                 }
4388                                 if (check_netmask($8, binat.af))
4389                                         YYERROR;
4390                                 memcpy(&binat.src.addr, &$8->addr,
4391                                     sizeof(binat.src.addr));
4392                                 free($8);
4393                         }
4394                         if ($9 != NULL) {
4395                                 if ($9->next) {
4396                                         yyerror("multiple binat ip addresses");
4397                                         YYERROR;
4398                                 }
4399                                 if ($9->af != binat.af && $9->af) {
4400                                         yyerror("binat ip versions must match");
4401                                         YYERROR;
4402                                 }
4403                                 if (check_netmask($9, binat.af))
4404                                         YYERROR;
4405                                 memcpy(&binat.dst.addr, &$9->addr,
4406                                     sizeof(binat.dst.addr));
4407                                 binat.dst.neg = $9->not;
4408                                 free($9);
4409                         }
4410
4411                         if (binat.action == PF_NOBINAT) {
4412                                 if ($13 != NULL) {
4413                                         yyerror("'no binat' rule does not need"
4414                                             " '->'");
4415                                         YYERROR;
4416                                 }
4417                         } else {
4418                                 if ($13 == NULL || $13->host == NULL) {
4419                                         yyerror("'binat' rule requires"
4420                                             " '-> address'");
4421                                         YYERROR;
4422                                 }
4423
4424                                 remove_invalid_hosts(&$13->host, &binat.af);
4425                                 if (invalid_redirect($13->host, binat.af))
4426                                         YYERROR;
4427                                 if ($13->host->next != NULL) {
4428                                         yyerror("binat rule must redirect to "
4429                                             "a single address");
4430                                         YYERROR;
4431                                 }
4432                                 if (check_netmask($13->host, binat.af))
4433                                         YYERROR;
4434
4435                                 if (!PF_AZERO(&binat.src.addr.v.a.mask,
4436                                     binat.af) &&
4437                                     !PF_AEQ(&binat.src.addr.v.a.mask,
4438                                     &$13->host->addr.v.a.mask, binat.af)) {
4439                                         yyerror("'binat' source mask and "
4440                                             "redirect mask must be the same");
4441                                         YYERROR;
4442                                 }
4443
4444                                 TAILQ_INIT(&binat.rpool.list);
4445                                 pa = calloc(1, sizeof(struct pf_pooladdr));
4446                                 if (pa == NULL)
4447                                         err(1, "binat: calloc");
4448                                 pa->addr = $13->host->addr;
4449                                 pa->ifname[0] = 0;
4450                                 TAILQ_INSERT_TAIL(&binat.rpool.list,
4451                                     pa, entries);
4452
4453                                 free($13);
4454                         }
4455
4456                         pfctl_append_rule(pf, &binat, "");
4457                 }
4458                 ;
4459
4460 tag             : /* empty */           { $$ = NULL; }
4461                 | TAG STRING            { $$ = $2; }
4462                 ;
4463
4464 tagged          : /* empty */           { $$.neg = 0; $$.name = NULL; }
4465                 | not TAGGED string     { $$.neg = $1; $$.name = $3; }
4466                 ;
4467
4468 rtable          : /* empty */           { $$ = -1; }
4469                 | RTABLE NUMBER         {
4470                         if ($2 < 0 || $2 > rt_tableid_max()) {
4471                                 yyerror("invalid rtable id");
4472                                 YYERROR;
4473                         }
4474                         $$ = $2;
4475                 }
4476                 ;
4477
4478 route_host      : STRING                        {
4479                         $$ = calloc(1, sizeof(struct node_host));
4480                         if ($$ == NULL)
4481                                 err(1, "route_host: calloc");
4482                         $$->ifname = strdup($1);
4483                         set_ipmask($$, 128);
4484                         $$->next = NULL;
4485                         $$->tail = $$;
4486                 }
4487                 | '(' STRING host ')'           {
4488                         struct node_host *n;
4489
4490                         $$ = $3;
4491                         for (n = $3; n != NULL; n = n->next)
4492                                 n->ifname = strdup($2);
4493                 }
4494                 ;
4495
4496 route_host_list : route_host optnl                      { $$ = $1; }
4497                 | route_host_list comma route_host optnl {
4498                         if ($1->af == 0)
4499                                 $1->af = $3->af;
4500                         if ($1->af != $3->af) {
4501                                 yyerror("all pool addresses must be in the "
4502                                     "same address family");
4503                                 YYERROR;
4504                         }
4505                         $1->tail->next = $3;
4506                         $1->tail = $3->tail;
4507                         $$ = $1;
4508                 }
4509                 ;
4510
4511 routespec       : route_host                    { $$ = $1; }
4512                 | '{' optnl route_host_list '}' { $$ = $3; }
4513                 ;
4514
4515 route           : /* empty */                   {
4516                         $$.host = NULL;
4517                         $$.rt = 0;
4518                         $$.pool_opts = 0;
4519                 }
4520                 | FASTROUTE {
4521                         /* backwards-compat */
4522                         $$.host = NULL;
4523                         $$.rt = 0;
4524                         $$.pool_opts = 0;
4525                 }
4526                 | ROUTETO routespec pool_opts {
4527                         $$.host = $2;
4528                         $$.rt = PF_ROUTETO;
4529                         $$.pool_opts = $3.type | $3.opts;
4530                         if ($3.key != NULL)
4531                                 $$.key = $3.key;
4532                 }
4533                 | REPLYTO routespec pool_opts {
4534                         $$.host = $2;
4535                         $$.rt = PF_REPLYTO;
4536                         $$.pool_opts = $3.type | $3.opts;
4537                         if ($3.key != NULL)
4538                                 $$.key = $3.key;
4539                 }
4540                 | DUPTO routespec pool_opts {
4541                         $$.host = $2;
4542                         $$.rt = PF_DUPTO;
4543                         $$.pool_opts = $3.type | $3.opts;
4544                         if ($3.key != NULL)
4545                                 $$.key = $3.key;
4546                 }
4547                 ;
4548
4549 timeout_spec    : STRING NUMBER
4550                 {
4551                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4552                                 free($1);
4553                                 YYERROR;
4554                         }
4555                         if ($2 < 0 || $2 > UINT_MAX) {
4556                                 yyerror("only positive values permitted");
4557                                 YYERROR;
4558                         }
4559                         if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
4560                                 yyerror("unknown timeout %s", $1);
4561                                 free($1);
4562                                 YYERROR;
4563                         }
4564                         free($1);
4565                 }
4566                 | INTERVAL NUMBER               {
4567                         if (check_rulestate(PFCTL_STATE_OPTION))
4568                                 YYERROR;
4569                         if ($2 < 0 || $2 > UINT_MAX) {
4570                                 yyerror("only positive values permitted");
4571                                 YYERROR;
4572                         }
4573                         if (pfctl_set_timeout(pf, "interval", $2, 0) != 0)
4574                                 YYERROR;
4575                 }
4576                 ;
4577
4578 timeout_list    : timeout_list comma timeout_spec optnl
4579                 | timeout_spec optnl
4580                 ;
4581
4582 limit_spec      : STRING NUMBER
4583                 {
4584                         if (check_rulestate(PFCTL_STATE_OPTION)) {
4585                                 free($1);
4586                                 YYERROR;
4587                         }
4588                         if ($2 < 0 || $2 > UINT_MAX) {
4589                                 yyerror("only positive values permitted");
4590                                 YYERROR;
4591                         }
4592                         if (pfctl_set_limit(pf, $1, $2) != 0) {
4593                                 yyerror("unable to set limit %s %u", $1, $2);
4594                                 free($1);
4595                                 YYERROR;
4596                         }
4597                         free($1);
4598                 }
4599                 ;
4600
4601 limit_list      : limit_list comma limit_spec optnl
4602                 | limit_spec optnl
4603                 ;
4604
4605 comma           : ','
4606                 | /* empty */
4607                 ;
4608
4609 yesno           : NO                    { $$ = 0; }
4610                 | STRING                {
4611                         if (!strcmp($1, "yes"))
4612                                 $$ = 1;
4613                         else {
4614                                 yyerror("invalid value '%s', expected 'yes' "
4615                                     "or 'no'", $1);
4616                                 free($1);
4617                                 YYERROR;
4618                         }
4619                         free($1);
4620                 }
4621                 ;
4622
4623 unaryop         : '='           { $$ = PF_OP_EQ; }
4624                 | '!' '='       { $$ = PF_OP_NE; }
4625                 | '<' '='       { $$ = PF_OP_LE; }
4626                 | '<'           { $$ = PF_OP_LT; }
4627                 | '>' '='       { $$ = PF_OP_GE; }
4628                 | '>'           { $$ = PF_OP_GT; }
4629                 ;
4630
4631 %%
4632
4633 int
4634 yyerror(const char *fmt, ...)
4635 {
4636         va_list          ap;
4637
4638         file->errors++;
4639         va_start(ap, fmt);
4640         fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4641         vfprintf(stderr, fmt, ap);
4642         fprintf(stderr, "\n");
4643         va_end(ap);
4644         return (0);
4645 }
4646
4647 int
4648 disallow_table(struct node_host *h, const char *fmt)
4649 {
4650         for (; h != NULL; h = h->next)
4651                 if (h->addr.type == PF_ADDR_TABLE) {
4652                         yyerror(fmt, h->addr.v.tblname);
4653                         return (1);
4654                 }
4655         return (0);
4656 }
4657
4658 int
4659 disallow_urpf_failed(struct node_host *h, const char *fmt)
4660 {
4661         for (; h != NULL; h = h->next)
4662                 if (h->addr.type == PF_ADDR_URPFFAILED) {
4663                         yyerror(fmt);
4664                         return (1);
4665                 }
4666         return (0);
4667 }
4668
4669 int
4670 disallow_alias(struct node_host *h, const char *fmt)
4671 {
4672         for (; h != NULL; h = h->next)
4673                 if (DYNIF_MULTIADDR(h->addr)) {
4674                         yyerror(fmt, h->addr.v.tblname);
4675                         return (1);
4676                 }
4677         return (0);
4678 }
4679
4680 int
4681 rule_consistent(struct pfctl_rule *r, int anchor_call)
4682 {
4683         int     problems = 0;
4684
4685         switch (r->action) {
4686         case PF_PASS:
4687         case PF_DROP:
4688         case PF_SCRUB:
4689         case PF_NOSCRUB:
4690                 problems = filter_consistent(r, anchor_call);
4691                 break;
4692         case PF_NAT:
4693         case PF_NONAT:
4694                 problems = nat_consistent(r);
4695                 break;
4696         case PF_RDR:
4697         case PF_NORDR:
4698                 problems = rdr_consistent(r);
4699                 break;
4700         case PF_BINAT:
4701         case PF_NOBINAT:
4702         default:
4703                 break;
4704         }
4705         return (problems);
4706 }
4707
4708 int
4709 filter_consistent(struct pfctl_rule *r, int anchor_call)
4710 {
4711         int     problems = 0;
4712
4713         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4714             (r->src.port_op || r->dst.port_op)) {
4715                 yyerror("port only applies to tcp/udp");
4716                 problems++;
4717         }
4718         if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4719             (r->type || r->code)) {
4720                 yyerror("icmp-type/code only applies to icmp");
4721                 problems++;
4722         }
4723         if (!r->af && (r->type || r->code)) {
4724                 yyerror("must indicate address family with icmp-type/code");
4725                 problems++;
4726         }
4727         if (r->overload_tblname[0] &&
4728             r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4729                 yyerror("'overload' requires 'max-src-conn' "
4730                     "or 'max-src-conn-rate'");
4731                 problems++;
4732         }
4733         if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4734             (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4735                 yyerror("proto %s doesn't match address family %s",
4736                     r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4737                     r->af == AF_INET ? "inet" : "inet6");
4738                 problems++;
4739         }
4740         if (r->allow_opts && r->action != PF_PASS) {
4741                 yyerror("allow-opts can only be specified for pass rules");
4742                 problems++;
4743         }
4744         if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4745             r->dst.port_op || r->flagset || r->type || r->code)) {
4746                 yyerror("fragments can be filtered only on IP header fields");
4747                 problems++;
4748         }
4749         if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4750                 yyerror("return-rst can only be applied to TCP rules");
4751                 problems++;
4752         }
4753         if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4754                 yyerror("max-src-nodes requires 'source-track rule'");
4755                 problems++;
4756         }
4757         if (r->action == PF_DROP && r->keep_state) {
4758                 yyerror("keep state on block rules doesn't make sense");
4759                 problems++;
4760         }
4761         if (r->rule_flag & PFRULE_STATESLOPPY &&
4762             (r->keep_state == PF_STATE_MODULATE ||
4763             r->keep_state == PF_STATE_SYNPROXY)) {
4764                 yyerror("sloppy state matching cannot be used with "
4765                     "synproxy state or modulate state");
4766                 problems++;
4767         }
4768         return (-problems);
4769 }
4770
4771 int
4772 nat_consistent(struct pfctl_rule *r)
4773 {
4774         return (0);     /* yeah! */
4775 }
4776
4777 int
4778 rdr_consistent(struct pfctl_rule *r)
4779 {
4780         int                      problems = 0;
4781
4782         if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
4783                 if (r->src.port_op) {
4784                         yyerror("src port only applies to tcp/udp");
4785                         problems++;
4786                 }
4787                 if (r->dst.port_op) {
4788                         yyerror("dst port only applies to tcp/udp");
4789                         problems++;
4790                 }
4791                 if (r->rpool.proxy_port[0]) {
4792                         yyerror("rpool port only applies to tcp/udp");
4793                         problems++;
4794                 }
4795         }
4796         if (r->dst.port_op &&
4797             r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
4798                 yyerror("invalid port operator for rdr destination port");
4799                 problems++;
4800         }
4801         return (-problems);
4802 }
4803
4804 int
4805 process_tabledef(char *name, struct table_opts *opts)
4806 {
4807         struct pfr_buffer        ab;
4808         struct node_tinit       *ti;
4809         unsigned long            maxcount;
4810         size_t                   s = sizeof(maxcount);
4811
4812         bzero(&ab, sizeof(ab));
4813         ab.pfrb_type = PFRB_ADDRS;
4814         SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4815                 if (ti->file)
4816                         if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
4817                                 if (errno)
4818                                         yyerror("cannot load \"%s\": %s",
4819                                             ti->file, strerror(errno));
4820                                 else
4821                                         yyerror("file \"%s\" contains bad data",
4822                                             ti->file);
4823                                 goto _error;
4824                         }
4825                 if (ti->host)
4826                         if (append_addr_host(&ab, ti->host, 0, 0)) {
4827                                 yyerror("cannot create address buffer: %s",
4828                                     strerror(errno));
4829                                 goto _error;
4830                         }
4831         }
4832         if (pf->opts & PF_OPT_VERBOSE)
4833                 print_tabledef(name, opts->flags, opts->init_addr,
4834                     &opts->init_nodes);
4835         if (!(pf->opts & PF_OPT_NOACTION) &&
4836             pfctl_define_table(name, opts->flags, opts->init_addr,
4837             pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4838
4839                 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s,
4840                     NULL, 0) == -1)
4841                         maxcount = 65535;
4842
4843                 if (ab.pfrb_size > maxcount)
4844                         yyerror("cannot define table %s: too many elements.\n"
4845                             "Consider increasing net.pf.request_maxcount.",
4846                             name);
4847                 else
4848                         yyerror("cannot define table %s: %s", name,
4849                             pfr_strerror(errno));
4850
4851                 goto _error;
4852         }
4853         pf->tdirty = 1;
4854         pfr_buf_clear(&ab);
4855         return (0);
4856 _error:
4857         pfr_buf_clear(&ab);
4858         return (-1);
4859 }
4860
4861 struct keywords {
4862         const char      *k_name;
4863         int              k_val;
4864 };
4865
4866 /* macro gore, but you should've seen the prior indentation nightmare... */
4867
4868 #define FREE_LIST(T,r) \
4869         do { \
4870                 T *p, *node = r; \
4871                 while (node != NULL) { \
4872                         p = node; \
4873                         node = node->next; \
4874                         free(p); \
4875                 } \
4876         } while (0)
4877
4878 #define LOOP_THROUGH(T,n,r,C) \
4879         do { \
4880                 T *n; \
4881                 if (r == NULL) { \
4882                         r = calloc(1, sizeof(T)); \
4883                         if (r == NULL) \
4884                                 err(1, "LOOP: calloc"); \
4885                         r->next = NULL; \
4886                 } \
4887                 n = r; \
4888                 while (n != NULL) { \
4889                         do { \
4890                                 C; \
4891                         } while (0); \
4892                         n = n->next; \
4893                 } \
4894         } while (0)
4895
4896 void
4897 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4898 {
4899         char *tmp;
4900         char *p, *q;
4901
4902         if ((tmp = calloc(1, len)) == NULL)
4903                 err(1, "expand_label_str: calloc");
4904         p = q = label;
4905         while ((q = strstr(p, srch)) != NULL) {
4906                 *q = '\0';
4907                 if ((strlcat(tmp, p, len) >= len) ||
4908                     (strlcat(tmp, repl, len) >= len))
4909                         errx(1, "expand_label: label too long");
4910                 q += strlen(srch);
4911                 p = q;
4912         }
4913         if (strlcat(tmp, p, len) >= len)
4914                 errx(1, "expand_label: label too long");
4915         strlcpy(label, tmp, len);       /* always fits */
4916         free(tmp);
4917 }
4918
4919 void
4920 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4921 {
4922         if (strstr(label, name) != NULL) {
4923                 if (!*ifname)
4924                         expand_label_str(label, len, name, "any");
4925                 else
4926                         expand_label_str(label, len, name, ifname);
4927         }
4928 }
4929
4930 void
4931 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
4932     struct node_host *h)
4933 {
4934         char tmp[64], tmp_not[66];
4935
4936         if (strstr(label, name) != NULL) {
4937                 switch (h->addr.type) {
4938                 case PF_ADDR_DYNIFTL:
4939                         snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname);
4940                         break;
4941                 case PF_ADDR_TABLE:
4942                         snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname);
4943                         break;
4944                 case PF_ADDR_NOROUTE:
4945                         snprintf(tmp, sizeof(tmp), "no-route");
4946                         break;
4947                 case PF_ADDR_URPFFAILED:
4948                         snprintf(tmp, sizeof(tmp), "urpf-failed");
4949                         break;
4950                 case PF_ADDR_ADDRMASK:
4951                         if (!af || (PF_AZERO(&h->addr.v.a.addr, af) &&
4952                             PF_AZERO(&h->addr.v.a.mask, af)))
4953                                 snprintf(tmp, sizeof(tmp), "any");
4954                         else {
4955                                 char    a[48];
4956                                 int     bits;
4957
4958                                 if (inet_ntop(af, &h->addr.v.a.addr, a,
4959                                     sizeof(a)) == NULL)
4960                                         snprintf(tmp, sizeof(tmp), "?");
4961                                 else {
4962                                         bits = unmask(&h->addr.v.a.mask, af);
4963                                         if ((af == AF_INET && bits < 32) ||
4964                                             (af == AF_INET6 && bits < 128))
4965                                                 snprintf(tmp, sizeof(tmp),
4966                                                     "%s/%d", a, bits);
4967                                         else
4968                                                 snprintf(tmp, sizeof(tmp),
4969                                                     "%s", a);
4970                                 }
4971                         }
4972                         break;
4973                 default:
4974                         snprintf(tmp, sizeof(tmp), "?");
4975                         break;
4976                 }
4977
4978                 if (h->not) {
4979                         snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
4980                         expand_label_str(label, len, name, tmp_not);
4981                 } else
4982                         expand_label_str(label, len, name, tmp);
4983         }
4984 }
4985
4986 void
4987 expand_label_port(const char *name, char *label, size_t len,
4988     struct node_port *port)
4989 {
4990         char     a1[6], a2[6], op[13] = "";
4991
4992         if (strstr(label, name) != NULL) {
4993                 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0]));
4994                 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1]));
4995                 if (!port->op)
4996                         ;
4997                 else if (port->op == PF_OP_IRG)
4998                         snprintf(op, sizeof(op), "%s><%s", a1, a2);
4999                 else if (port->op == PF_OP_XRG)
5000                         snprintf(op, sizeof(op), "%s<>%s", a1, a2);
5001                 else if (port->op == PF_OP_EQ)
5002                         snprintf(op, sizeof(op), "%s", a1);
5003                 else if (port->op == PF_OP_NE)
5004                         snprintf(op, sizeof(op), "!=%s", a1);
5005                 else if (port->op == PF_OP_LT)
5006                         snprintf(op, sizeof(op), "<%s", a1);
5007                 else if (port->op == PF_OP_LE)
5008                         snprintf(op, sizeof(op), "<=%s", a1);
5009                 else if (port->op == PF_OP_GT)
5010                         snprintf(op, sizeof(op), ">%s", a1);
5011                 else if (port->op == PF_OP_GE)
5012                         snprintf(op, sizeof(op), ">=%s", a1);
5013                 expand_label_str(label, len, name, op);
5014         }
5015 }
5016
5017 void
5018 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
5019 {
5020         struct protoent *pe;
5021         char n[4];
5022
5023         if (strstr(label, name) != NULL) {
5024                 pe = getprotobynumber(proto);
5025                 if (pe != NULL)
5026                         expand_label_str(label, len, name, pe->p_name);
5027                 else {
5028                         snprintf(n, sizeof(n), "%u", proto);
5029                         expand_label_str(label, len, name, n);
5030                 }
5031         }
5032 }
5033
5034 void
5035 expand_label_nr(const char *name, char *label, size_t len)
5036 {
5037         char n[11];
5038
5039         if (strstr(label, name) != NULL) {
5040                 snprintf(n, sizeof(n), "%u", pf->anchor->match);
5041                 expand_label_str(label, len, name, n);
5042         }
5043 }
5044
5045 void
5046 expand_label(char *label, size_t len, const char *ifname, sa_family_t af,
5047     struct node_host *src_host, struct node_port *src_port,
5048     struct node_host *dst_host, struct node_port *dst_port,
5049     u_int8_t proto)
5050 {
5051         expand_label_if("$if", label, len, ifname);
5052         expand_label_addr("$srcaddr", label, len, af, src_host);
5053         expand_label_addr("$dstaddr", label, len, af, dst_host);
5054         expand_label_port("$srcport", label, len, src_port);
5055         expand_label_port("$dstport", label, len, dst_port);
5056         expand_label_proto("$proto", label, len, proto);
5057         expand_label_nr("$nr", label, len);
5058 }
5059
5060 int
5061 expand_altq(struct pf_altq *a, struct node_if *interfaces,
5062     struct node_queue *nqueues, struct node_queue_bw bwspec,
5063     struct node_queue_opt *opts)
5064 {
5065         struct pf_altq           pa, pb;
5066         char                     qname[PF_QNAME_SIZE];
5067         struct node_queue       *n;
5068         struct node_queue_bw     bw;
5069         int                      errs = 0;
5070
5071         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
5072                 FREE_LIST(struct node_if, interfaces);
5073                 if (nqueues)
5074                         FREE_LIST(struct node_queue, nqueues);
5075                 return (0);
5076         }
5077
5078         LOOP_THROUGH(struct node_if, interface, interfaces,
5079                 memcpy(&pa, a, sizeof(struct pf_altq));
5080                 if (strlcpy(pa.ifname, interface->ifname,
5081                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
5082                         errx(1, "expand_altq: strlcpy");
5083
5084                 if (interface->not) {
5085                         yyerror("altq on ! <interface> is not supported");
5086                         errs++;
5087                 } else {
5088                         if (eval_pfaltq(pf, &pa, &bwspec, opts))
5089                                 errs++;
5090                         else
5091                                 if (pfctl_add_altq(pf, &pa))
5092                                         errs++;
5093
5094                         if (pf->opts & PF_OPT_VERBOSE) {
5095                                 print_altq(&pf->paltq->altq, 0,
5096                                     &bwspec, opts);
5097                                 if (nqueues && nqueues->tail) {
5098                                         printf("queue { ");
5099                                         LOOP_THROUGH(struct node_queue, queue,
5100                                             nqueues,
5101                                                 printf("%s ",
5102                                                     queue->queue);
5103                                         );
5104                                         printf("}");
5105                                 }
5106                                 printf("\n");
5107                         }
5108
5109                         if (pa.scheduler == ALTQT_CBQ ||
5110                             pa.scheduler == ALTQT_HFSC ||
5111                             pa.scheduler == ALTQT_FAIRQ) {
5112                                 /* now create a root queue */
5113                                 memset(&pb, 0, sizeof(struct pf_altq));
5114                                 if (strlcpy(qname, "root_", sizeof(qname)) >=
5115                                     sizeof(qname))
5116                                         errx(1, "expand_altq: strlcpy");
5117                                 if (strlcat(qname, interface->ifname,
5118                                     sizeof(qname)) >= sizeof(qname))
5119                                         errx(1, "expand_altq: strlcat");
5120                                 if (strlcpy(pb.qname, qname,
5121                                     sizeof(pb.qname)) >= sizeof(pb.qname))
5122                                         errx(1, "expand_altq: strlcpy");
5123                                 if (strlcpy(pb.ifname, interface->ifname,
5124                                     sizeof(pb.ifname)) >= sizeof(pb.ifname))
5125                                         errx(1, "expand_altq: strlcpy");
5126                                 pb.qlimit = pa.qlimit;
5127                                 pb.scheduler = pa.scheduler;
5128                                 bw.bw_absolute = pa.ifbandwidth;
5129                                 bw.bw_percent = 0;
5130                                 if (eval_pfqueue(pf, &pb, &bw, opts))
5131                                         errs++;
5132                                 else
5133                                         if (pfctl_add_altq(pf, &pb))
5134                                                 errs++;
5135                         }
5136
5137                         LOOP_THROUGH(struct node_queue, queue, nqueues,
5138                                 n = calloc(1, sizeof(struct node_queue));
5139                                 if (n == NULL)
5140                                         err(1, "expand_altq: calloc");
5141                                 if (pa.scheduler == ALTQT_CBQ ||
5142                                     pa.scheduler == ALTQT_HFSC ||
5143                                     pa.scheduler == ALTQT_FAIRQ)
5144                                         if (strlcpy(n->parent, qname,
5145                                             sizeof(n->parent)) >=
5146                                             sizeof(n->parent))
5147                                                 errx(1, "expand_altq: strlcpy");
5148                                 if (strlcpy(n->queue, queue->queue,
5149                                     sizeof(n->queue)) >= sizeof(n->queue))
5150                                         errx(1, "expand_altq: strlcpy");
5151                                 if (strlcpy(n->ifname, interface->ifname,
5152                                     sizeof(n->ifname)) >= sizeof(n->ifname))
5153                                         errx(1, "expand_altq: strlcpy");
5154                                 n->scheduler = pa.scheduler;
5155                                 n->next = NULL;
5156                                 n->tail = n;
5157                                 if (queues == NULL)
5158                                         queues = n;
5159                                 else {
5160                                         queues->tail->next = n;
5161                                         queues->tail = n;
5162                                 }
5163                         );
5164                 }
5165         );
5166         FREE_LIST(struct node_if, interfaces);
5167         if (nqueues)
5168                 FREE_LIST(struct node_queue, nqueues);
5169
5170         return (errs);
5171 }
5172
5173 int
5174 expand_queue(struct pf_altq *a, struct node_if *interfaces,
5175     struct node_queue *nqueues, struct node_queue_bw bwspec,
5176     struct node_queue_opt *opts)
5177 {
5178         struct node_queue       *n, *nq;
5179         struct pf_altq           pa;
5180         u_int8_t                 found = 0;
5181         u_int8_t                 errs = 0;
5182
5183         if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
5184                 FREE_LIST(struct node_queue, nqueues);
5185                 return (0);
5186         }
5187
5188         if (queues == NULL) {
5189                 yyerror("queue %s has no parent", a->qname);
5190                 FREE_LIST(struct node_queue, nqueues);
5191                 return (1);
5192         }
5193
5194         LOOP_THROUGH(struct node_if, interface, interfaces,
5195                 LOOP_THROUGH(struct node_queue, tqueue, queues,
5196                         if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
5197                             (interface->ifname[0] == 0 ||
5198                             (!interface->not && !strncmp(interface->ifname,
5199                             tqueue->ifname, IFNAMSIZ)) ||
5200                             (interface->not && strncmp(interface->ifname,
5201                             tqueue->ifname, IFNAMSIZ)))) {
5202                                 /* found ourself in queues */
5203                                 found++;
5204
5205                                 memcpy(&pa, a, sizeof(struct pf_altq));
5206
5207                                 if (pa.scheduler != ALTQT_NONE &&
5208                                     pa.scheduler != tqueue->scheduler) {
5209                                         yyerror("exactly one scheduler type "
5210                                             "per interface allowed");
5211                                         return (1);
5212                                 }
5213                                 pa.scheduler = tqueue->scheduler;
5214
5215                                 /* scheduler dependent error checking */
5216                                 switch (pa.scheduler) {
5217                                 case ALTQT_PRIQ:
5218                                         if (nqueues != NULL) {
5219                                                 yyerror("priq queues cannot "
5220                                                     "have child queues");
5221                                                 return (1);
5222                                         }
5223                                         if (bwspec.bw_absolute > 0 ||
5224                                             bwspec.bw_percent < 100) {
5225                                                 yyerror("priq doesn't take "
5226                                                     "bandwidth");
5227                                                 return (1);
5228                                         }
5229                                         break;
5230                                 default:
5231                                         break;
5232                                 }
5233
5234                                 if (strlcpy(pa.ifname, tqueue->ifname,
5235                                     sizeof(pa.ifname)) >= sizeof(pa.ifname))
5236                                         errx(1, "expand_queue: strlcpy");
5237                                 if (strlcpy(pa.parent, tqueue->parent,
5238                                     sizeof(pa.parent)) >= sizeof(pa.parent))
5239                                         errx(1, "expand_queue: strlcpy");
5240
5241                                 if (eval_pfqueue(pf, &pa, &bwspec, opts))
5242                                         errs++;
5243                                 else
5244                                         if (pfctl_add_altq(pf, &pa))
5245                                                 errs++;
5246
5247                                 for (nq = nqueues; nq != NULL; nq = nq->next) {
5248                                         if (!strcmp(a->qname, nq->queue)) {
5249                                                 yyerror("queue cannot have "
5250                                                     "itself as child");
5251                                                 errs++;
5252                                                 continue;
5253                                         }
5254                                         n = calloc(1,
5255                                             sizeof(struct node_queue));
5256                                         if (n == NULL)
5257                                                 err(1, "expand_queue: calloc");
5258                                         if (strlcpy(n->parent, a->qname,
5259                                             sizeof(n->parent)) >=
5260                                             sizeof(n->parent))
5261                                                 errx(1, "expand_queue strlcpy");
5262                                         if (strlcpy(n->queue, nq->queue,
5263                                             sizeof(n->queue)) >=
5264                                             sizeof(n->queue))
5265                                                 errx(1, "expand_queue strlcpy");
5266                                         if (strlcpy(n->ifname, tqueue->ifname,
5267                                             sizeof(n->ifname)) >=
5268                                             sizeof(n->ifname))
5269                                                 errx(1, "expand_queue strlcpy");
5270                                         n->scheduler = tqueue->scheduler;
5271                                         n->next = NULL;
5272                                         n->tail = n;
5273                                         if (queues == NULL)
5274                                                 queues = n;
5275                                         else {
5276                                                 queues->tail->next = n;
5277                                                 queues->tail = n;
5278                                         }
5279                                 }
5280                                 if ((pf->opts & PF_OPT_VERBOSE) && (
5281                                     (found == 1 && interface->ifname[0] == 0) ||
5282                                     (found > 0 && interface->ifname[0] != 0))) {
5283                                         print_queue(&pf->paltq->altq, 0,
5284                                             &bwspec, interface->ifname[0] != 0,
5285                                             opts);
5286                                         if (nqueues && nqueues->tail) {
5287                                                 printf("{ ");
5288                                                 LOOP_THROUGH(struct node_queue,
5289                                                     queue, nqueues,
5290                                                         printf("%s ",
5291                                                             queue->queue);
5292                                                 );
5293                                                 printf("}");
5294                                         }
5295                                         printf("\n");
5296                                 }
5297                         }
5298                 );
5299         );
5300
5301         FREE_LIST(struct node_queue, nqueues);
5302         FREE_LIST(struct node_if, interfaces);
5303
5304         if (!found) {
5305                 yyerror("queue %s has no parent", a->qname);
5306                 errs++;
5307         }
5308
5309         if (errs)
5310                 return (1);
5311         else
5312                 return (0);
5313 }
5314
5315 void
5316 expand_rule(struct pfctl_rule *r,
5317     struct node_if *interfaces, struct node_host *rpool_hosts,
5318     struct node_proto *protos, struct node_os *src_oses,
5319     struct node_host *src_hosts, struct node_port *src_ports,
5320     struct node_host *dst_hosts, struct node_port *dst_ports,
5321     struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types,
5322     const char *anchor_call)
5323 {
5324         sa_family_t              af = r->af;
5325         int                      added = 0, error = 0;
5326         char                     ifname[IF_NAMESIZE];
5327         char                     label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE];
5328         char                     tagname[PF_TAG_NAME_SIZE];
5329         char                     match_tagname[PF_TAG_NAME_SIZE];
5330         struct pf_pooladdr      *pa;
5331         struct node_host        *h;
5332         u_int8_t                 flags, flagset, keep_state;
5333
5334         memcpy(label, r->label, sizeof(r->label));
5335         assert(sizeof(r->label) == sizeof(label));
5336         if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
5337                 errx(1, "expand_rule: strlcpy");
5338         if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
5339             sizeof(match_tagname))
5340                 errx(1, "expand_rule: strlcpy");
5341         flags = r->flags;
5342         flagset = r->flagset;
5343         keep_state = r->keep_state;
5344
5345         LOOP_THROUGH(struct node_if, interface, interfaces,
5346         LOOP_THROUGH(struct node_proto, proto, protos,
5347         LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
5348         LOOP_THROUGH(struct node_host, src_host, src_hosts,
5349         LOOP_THROUGH(struct node_port, src_port, src_ports,
5350         LOOP_THROUGH(struct node_os, src_os, src_oses,
5351         LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
5352         LOOP_THROUGH(struct node_port, dst_port, dst_ports,
5353         LOOP_THROUGH(struct node_uid, uid, uids,
5354         LOOP_THROUGH(struct node_gid, gid, gids,
5355
5356                 r->af = af;
5357                 /* for link-local IPv6 address, interface must match up */
5358                 if ((r->af && src_host->af && r->af != src_host->af) ||
5359                     (r->af && dst_host->af && r->af != dst_host->af) ||
5360                     (src_host->af && dst_host->af &&
5361                     src_host->af != dst_host->af) ||
5362                     (src_host->ifindex && dst_host->ifindex &&
5363                     src_host->ifindex != dst_host->ifindex) ||
5364                     (src_host->ifindex && *interface->ifname &&
5365                     src_host->ifindex != if_nametoindex(interface->ifname)) ||
5366                     (dst_host->ifindex && *interface->ifname &&
5367                     dst_host->ifindex != if_nametoindex(interface->ifname)))
5368                         continue;
5369                 if (!r->af && src_host->af)
5370                         r->af = src_host->af;
5371                 else if (!r->af && dst_host->af)
5372                         r->af = dst_host->af;
5373
5374                 if (*interface->ifname)
5375                         strlcpy(r->ifname, interface->ifname,
5376                             sizeof(r->ifname));
5377                 else if (if_indextoname(src_host->ifindex, ifname))
5378                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5379                 else if (if_indextoname(dst_host->ifindex, ifname))
5380                         strlcpy(r->ifname, ifname, sizeof(r->ifname));
5381                 else
5382                         memset(r->ifname, '\0', sizeof(r->ifname));
5383
5384                 memcpy(r->label, label, sizeof(r->label));
5385                 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
5386                     sizeof(r->tagname))
5387                         errx(1, "expand_rule: strlcpy");
5388                 if (strlcpy(r->match_tagname, match_tagname,
5389                     sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
5390                         errx(1, "expand_rule: strlcpy");
5391                 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
5392                         expand_label(r->label[i], PF_RULE_LABEL_SIZE,
5393                             r->ifname, r->af, src_host, src_port, dst_host,
5394                             dst_port, proto->proto);
5395                 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af,
5396                     src_host, src_port, dst_host, dst_port, proto->proto);
5397                 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname,
5398                     r->af, src_host, src_port, dst_host, dst_port,
5399                     proto->proto);
5400
5401                 error += check_netmask(src_host, r->af);
5402                 error += check_netmask(dst_host, r->af);
5403
5404                 r->ifnot = interface->not;
5405                 r->proto = proto->proto;
5406                 r->src.addr = src_host->addr;
5407                 r->src.neg = src_host->not;
5408                 r->src.port[0] = src_port->port[0];
5409                 r->src.port[1] = src_port->port[1];
5410                 r->src.port_op = src_port->op;
5411                 r->dst.addr = dst_host->addr;
5412                 r->dst.neg = dst_host->not;
5413                 r->dst.port[0] = dst_port->port[0];
5414                 r->dst.port[1] = dst_port->port[1];
5415                 r->dst.port_op = dst_port->op;
5416                 r->uid.op = uid->op;
5417                 r->uid.uid[0] = uid->uid[0];
5418                 r->uid.uid[1] = uid->uid[1];
5419                 r->gid.op = gid->op;
5420                 r->gid.gid[0] = gid->gid[0];
5421                 r->gid.gid[1] = gid->gid[1];
5422                 r->type = icmp_type->type;
5423                 r->code = icmp_type->code;
5424
5425                 if ((keep_state == PF_STATE_MODULATE ||
5426                     keep_state == PF_STATE_SYNPROXY) &&
5427                     r->proto && r->proto != IPPROTO_TCP)
5428                         r->keep_state = PF_STATE_NORMAL;
5429                 else
5430                         r->keep_state = keep_state;
5431
5432                 if (r->proto && r->proto != IPPROTO_TCP) {
5433                         r->flags = 0;
5434                         r->flagset = 0;
5435                 } else {
5436                         r->flags = flags;
5437                         r->flagset = flagset;
5438                 }
5439                 if (icmp_type->proto && r->proto != icmp_type->proto) {
5440                         yyerror("icmp-type mismatch");
5441                         error++;
5442                 }
5443
5444                 if (src_os && src_os->os) {
5445                         r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5446                         if ((pf->opts & PF_OPT_VERBOSE2) &&
5447                             r->os_fingerprint == PF_OSFP_NOMATCH)
5448                                 fprintf(stderr,
5449                                     "warning: unknown '%s' OS fingerprint\n",
5450                                     src_os->os);
5451                 } else {
5452                         r->os_fingerprint = PF_OSFP_ANY;
5453                 }
5454
5455                 TAILQ_INIT(&r->rpool.list);
5456                 for (h = rpool_hosts; h != NULL; h = h->next) {
5457                         pa = calloc(1, sizeof(struct pf_pooladdr));
5458                         if (pa == NULL)
5459                                 err(1, "expand_rule: calloc");
5460                         pa->addr = h->addr;
5461                         if (h->ifname != NULL) {
5462                                 if (strlcpy(pa->ifname, h->ifname,
5463                                     sizeof(pa->ifname)) >=
5464                                     sizeof(pa->ifname))
5465                                         errx(1, "expand_rule: strlcpy");
5466                         } else
5467                                 pa->ifname[0] = 0;
5468                         TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
5469                 }
5470
5471                 if (rule_consistent(r, anchor_call[0]) < 0 || error)
5472                         yyerror("skipping rule due to errors");
5473                 else {
5474                         r->nr = pf->astack[pf->asd]->match++;
5475                         pfctl_append_rule(pf, r, anchor_call);
5476                         added++;
5477                 }
5478
5479         ))))))))));
5480
5481         FREE_LIST(struct node_if, interfaces);
5482         FREE_LIST(struct node_proto, protos);
5483         FREE_LIST(struct node_host, src_hosts);
5484         FREE_LIST(struct node_port, src_ports);
5485         FREE_LIST(struct node_os, src_oses);
5486         FREE_LIST(struct node_host, dst_hosts);
5487         FREE_LIST(struct node_port, dst_ports);
5488         FREE_LIST(struct node_uid, uids);
5489         FREE_LIST(struct node_gid, gids);
5490         FREE_LIST(struct node_icmp, icmp_types);
5491         FREE_LIST(struct node_host, rpool_hosts);
5492
5493         if (!added)
5494                 yyerror("rule expands to no valid combination");
5495 }
5496
5497 int
5498 expand_skip_interface(struct node_if *interfaces)
5499 {
5500         int     errs = 0;
5501
5502         if (!interfaces || (!interfaces->next && !interfaces->not &&
5503             !strcmp(interfaces->ifname, "none"))) {
5504                 if (pf->opts & PF_OPT_VERBOSE)
5505                         printf("set skip on none\n");
5506                 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
5507                 return (errs);
5508         }
5509
5510         if (pf->opts & PF_OPT_VERBOSE)
5511                 printf("set skip on {");
5512         LOOP_THROUGH(struct node_if, interface, interfaces,
5513                 if (pf->opts & PF_OPT_VERBOSE)
5514                         printf(" %s", interface->ifname);
5515                 if (interface->not) {
5516                         yyerror("skip on ! <interface> is not supported");
5517                         errs++;
5518                 } else
5519                         errs += pfctl_set_interface_flags(pf,
5520                             interface->ifname, PFI_IFLAG_SKIP, 1);
5521         );
5522         if (pf->opts & PF_OPT_VERBOSE)
5523                 printf(" }\n");
5524
5525         FREE_LIST(struct node_if, interfaces);
5526
5527         if (errs)
5528                 return (1);
5529         else
5530                 return (0);
5531 }
5532
5533 #undef FREE_LIST
5534 #undef LOOP_THROUGH
5535
5536 int
5537 check_rulestate(int desired_state)
5538 {
5539         if (require_order && (rulestate > desired_state)) {
5540                 yyerror("Rules must be in order: options, normalization, "
5541                     "queueing, translation, filtering");
5542                 return (1);
5543         }
5544         rulestate = desired_state;
5545         return (0);
5546 }
5547
5548 int
5549 kw_cmp(const void *k, const void *e)
5550 {
5551         return (strcmp(k, ((const struct keywords *)e)->k_name));
5552 }
5553
5554 int
5555 lookup(char *s)
5556 {
5557         /* this has to be sorted always */
5558         static const struct keywords keywords[] = {
5559                 { "all",                ALL},
5560                 { "allow-opts",         ALLOWOPTS},
5561                 { "altq",               ALTQ},
5562                 { "anchor",             ANCHOR},
5563                 { "antispoof",          ANTISPOOF},
5564                 { "any",                ANY},
5565                 { "bandwidth",          BANDWIDTH},
5566                 { "binat",              BINAT},
5567                 { "binat-anchor",       BINATANCHOR},
5568                 { "bitmask",            BITMASK},
5569                 { "block",              BLOCK},
5570                 { "block-policy",       BLOCKPOLICY},
5571                 { "buckets",            BUCKETS},
5572                 { "cbq",                CBQ},
5573                 { "code",               CODE},
5574                 { "codelq",             CODEL},
5575                 { "crop",               FRAGCROP},
5576                 { "debug",              DEBUG},
5577                 { "divert-reply",       DIVERTREPLY},
5578                 { "divert-to",          DIVERTTO},
5579                 { "drop",               DROP},
5580                 { "drop-ovl",           FRAGDROP},
5581                 { "dup-to",             DUPTO},
5582                 { "fail-policy",        FAILPOLICY},
5583                 { "fairq",              FAIRQ},
5584                 { "fastroute",          FASTROUTE},
5585                 { "file",               FILENAME},
5586                 { "fingerprints",       FINGERPRINTS},
5587                 { "flags",              FLAGS},
5588                 { "floating",           FLOATING},
5589                 { "flush",              FLUSH},
5590                 { "for",                FOR},
5591                 { "fragment",           FRAGMENT},
5592                 { "from",               FROM},
5593                 { "global",             GLOBAL},
5594                 { "group",              GROUP},
5595                 { "hfsc",               HFSC},
5596                 { "hogs",               HOGS},
5597                 { "hostid",             HOSTID},
5598                 { "icmp-type",          ICMPTYPE},
5599                 { "icmp6-type",         ICMP6TYPE},
5600                 { "if-bound",           IFBOUND},
5601                 { "in",                 IN},
5602                 { "include",            INCLUDE},
5603                 { "inet",               INET},
5604                 { "inet6",              INET6},
5605                 { "interval",           INTERVAL},
5606                 { "keep",               KEEP},
5607                 { "keepcounters",       KEEPCOUNTERS},
5608                 { "label",              LABEL},
5609                 { "limit",              LIMIT},
5610                 { "linkshare",          LINKSHARE},
5611                 { "load",               LOAD},
5612                 { "log",                LOG},
5613                 { "loginterface",       LOGINTERFACE},
5614                 { "map-e-portset",      MAPEPORTSET},
5615                 { "max",                MAXIMUM},
5616                 { "max-mss",            MAXMSS},
5617                 { "max-src-conn",       MAXSRCCONN},
5618                 { "max-src-conn-rate",  MAXSRCCONNRATE},
5619                 { "max-src-nodes",      MAXSRCNODES},
5620                 { "max-src-states",     MAXSRCSTATES},
5621                 { "min-ttl",            MINTTL},
5622                 { "modulate",           MODULATE},
5623                 { "nat",                NAT},
5624                 { "nat-anchor",         NATANCHOR},
5625                 { "no",                 NO},
5626                 { "no-df",              NODF},
5627                 { "no-route",           NOROUTE},
5628                 { "no-sync",            NOSYNC},
5629                 { "on",                 ON},
5630                 { "optimization",       OPTIMIZATION},
5631                 { "os",                 OS},
5632                 { "out",                OUT},
5633                 { "overload",           OVERLOAD},
5634                 { "pass",               PASS},
5635                 { "port",               PORT},
5636                 { "prio",               PRIO},
5637                 { "priority",           PRIORITY},
5638                 { "priq",               PRIQ},
5639                 { "probability",        PROBABILITY},
5640                 { "proto",              PROTO},
5641                 { "qlimit",             QLIMIT},
5642                 { "queue",              QUEUE},
5643                 { "quick",              QUICK},
5644                 { "random",             RANDOM},
5645                 { "random-id",          RANDOMID},
5646                 { "rdr",                RDR},
5647                 { "rdr-anchor",         RDRANCHOR},
5648                 { "realtime",           REALTIME},
5649                 { "reassemble",         REASSEMBLE},
5650                 { "reply-to",           REPLYTO},
5651                 { "require-order",      REQUIREORDER},
5652                 { "return",             RETURN},
5653                 { "return-icmp",        RETURNICMP},
5654                 { "return-icmp6",       RETURNICMP6},
5655                 { "return-rst",         RETURNRST},
5656                 { "round-robin",        ROUNDROBIN},
5657                 { "route",              ROUTE},
5658                 { "route-to",           ROUTETO},
5659                 { "rtable",             RTABLE},
5660                 { "rule",               RULE},
5661                 { "ruleset-optimization",       RULESET_OPTIMIZATION},
5662                 { "scrub",              SCRUB},
5663                 { "set",                SET},
5664                 { "set-tos",            SETTOS},
5665                 { "skip",               SKIP},
5666                 { "sloppy",             SLOPPY},
5667                 { "source-hash",        SOURCEHASH},
5668                 { "source-track",       SOURCETRACK},
5669                 { "state",              STATE},
5670                 { "state-defaults",     STATEDEFAULTS},
5671                 { "state-policy",       STATEPOLICY},
5672                 { "static-port",        STATICPORT},
5673                 { "sticky-address",     STICKYADDRESS},
5674                 { "synproxy",           SYNPROXY},
5675                 { "table",              TABLE},
5676                 { "tag",                TAG},
5677                 { "tagged",             TAGGED},
5678                 { "target",             TARGET},
5679                 { "tbrsize",            TBRSIZE},
5680                 { "timeout",            TIMEOUT},
5681                 { "to",                 TO},
5682                 { "tos",                TOS},
5683                 { "ttl",                TTL},
5684                 { "upperlimit",         UPPERLIMIT},
5685                 { "urpf-failed",        URPFFAILED},
5686                 { "user",               USER},
5687         };
5688         const struct keywords   *p;
5689
5690         p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5691             sizeof(keywords[0]), kw_cmp);
5692
5693         if (p) {
5694                 if (debug > 1)
5695                         fprintf(stderr, "%s: %d\n", s, p->k_val);
5696                 return (p->k_val);
5697         } else {
5698                 if (debug > 1)
5699                         fprintf(stderr, "string: %s\n", s);
5700                 return (STRING);
5701         }
5702 }
5703
5704 #define MAXPUSHBACK     128
5705
5706 static char     *parsebuf;
5707 static int       parseindex;
5708 static char      pushback_buffer[MAXPUSHBACK];
5709 static int       pushback_index = 0;
5710
5711 int
5712 lgetc(int quotec)
5713 {
5714         int             c, next;
5715
5716         if (parsebuf) {
5717                 /* Read character from the parsebuffer instead of input. */
5718                 if (parseindex >= 0) {
5719                         c = parsebuf[parseindex++];
5720                         if (c != '\0')
5721                                 return (c);
5722                         parsebuf = NULL;
5723                 } else
5724                         parseindex++;
5725         }
5726
5727         if (pushback_index)
5728                 return (pushback_buffer[--pushback_index]);
5729
5730         if (quotec) {
5731                 if ((c = getc(file->stream)) == EOF) {
5732                         yyerror("reached end of file while parsing quoted string");
5733                         if (popfile() == EOF)
5734                                 return (EOF);
5735                         return (quotec);
5736                 }
5737                 return (c);
5738         }
5739
5740         while ((c = getc(file->stream)) == '\\') {
5741                 next = getc(file->stream);
5742                 if (next != '\n') {
5743                         c = next;
5744                         break;
5745                 }
5746                 yylval.lineno = file->lineno;
5747                 file->lineno++;
5748         }
5749
5750         while (c == EOF) {
5751                 if (popfile() == EOF)
5752                         return (EOF);
5753                 c = getc(file->stream);
5754         }
5755         return (c);
5756 }
5757
5758 int
5759 lungetc(int c)
5760 {
5761         if (c == EOF)
5762                 return (EOF);
5763         if (parsebuf) {
5764                 parseindex--;
5765                 if (parseindex >= 0)
5766                         return (c);
5767         }
5768         if (pushback_index < MAXPUSHBACK-1)
5769                 return (pushback_buffer[pushback_index++] = c);
5770         else
5771                 return (EOF);
5772 }
5773
5774 int
5775 findeol(void)
5776 {
5777         int     c;
5778
5779         parsebuf = NULL;
5780
5781         /* skip to either EOF or the first real EOL */
5782         while (1) {
5783                 if (pushback_index)
5784                         c = pushback_buffer[--pushback_index];
5785                 else
5786                         c = lgetc(0);
5787                 if (c == '\n') {
5788                         file->lineno++;
5789                         break;
5790                 }
5791                 if (c == EOF)
5792                         break;
5793         }
5794         return (ERROR);
5795 }
5796
5797 int
5798 yylex(void)
5799 {
5800         char     buf[8096];
5801         char    *p, *val;
5802         int      quotec, next, c;
5803         int      token;
5804
5805 top:
5806         p = buf;
5807         while ((c = lgetc(0)) == ' ' || c == '\t')
5808                 ; /* nothing */
5809
5810         yylval.lineno = file->lineno;
5811         if (c == '#')
5812                 while ((c = lgetc(0)) != '\n' && c != EOF)
5813                         ; /* nothing */
5814         if (c == '$' && parsebuf == NULL) {
5815                 while (1) {
5816                         if ((c = lgetc(0)) == EOF)
5817                                 return (0);
5818
5819                         if (p + 1 >= buf + sizeof(buf) - 1) {
5820                                 yyerror("string too long");
5821                                 return (findeol());
5822                         }
5823                         if (isalnum(c) || c == '_') {
5824                                 *p++ = (char)c;
5825                                 continue;
5826                         }
5827                         *p = '\0';
5828                         lungetc(c);
5829                         break;
5830                 }
5831                 val = symget(buf);
5832                 if (val == NULL) {
5833                         yyerror("macro '%s' not defined", buf);
5834                         return (findeol());
5835                 }
5836                 parsebuf = val;
5837                 parseindex = 0;
5838                 goto top;
5839         }
5840
5841         switch (c) {
5842         case '\'':
5843         case '"':
5844                 quotec = c;
5845                 while (1) {
5846                         if ((c = lgetc(quotec)) == EOF)
5847                                 return (0);
5848                         if (c == '\n') {
5849                                 file->lineno++;
5850                                 continue;
5851                         } else if (c == '\\') {
5852                                 if ((next = lgetc(quotec)) == EOF)
5853                                         return (0);
5854                                 if (next == quotec || c == ' ' || c == '\t')
5855                                         c = next;
5856                                 else if (next == '\n') {
5857                                         file->lineno++;
5858                                         continue;
5859                                 }
5860                                 else
5861                                         lungetc(next);
5862                         } else if (c == quotec) {
5863                                 *p = '\0';
5864                                 break;
5865                         }
5866                         if (p + 1 >= buf + sizeof(buf) - 1) {
5867                                 yyerror("string too long");
5868                                 return (findeol());
5869                         }
5870                         *p++ = (char)c;
5871                 }
5872                 yylval.v.string = strdup(buf);
5873                 if (yylval.v.string == NULL)
5874                         err(1, "yylex: strdup");
5875                 return (STRING);
5876         case '<':
5877                 next = lgetc(0);
5878                 if (next == '>') {
5879                         yylval.v.i = PF_OP_XRG;
5880                         return (PORTBINARY);
5881                 }
5882                 lungetc(next);
5883                 break;
5884         case '>':
5885                 next = lgetc(0);
5886                 if (next == '<') {
5887                         yylval.v.i = PF_OP_IRG;
5888                         return (PORTBINARY);
5889                 }
5890                 lungetc(next);
5891                 break;
5892         case '-':
5893                 next = lgetc(0);
5894                 if (next == '>')
5895                         return (ARROW);
5896                 lungetc(next);
5897                 break;
5898         }
5899
5900 #define allowed_to_end_number(x) \
5901         (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5902
5903         if (c == '-' || isdigit(c)) {
5904                 do {
5905                         *p++ = c;
5906                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5907                                 yyerror("string too long");
5908                                 return (findeol());
5909                         }
5910                 } while ((c = lgetc(0)) != EOF && isdigit(c));
5911                 lungetc(c);
5912                 if (p == buf + 1 && buf[0] == '-')
5913                         goto nodigits;
5914                 if (c == EOF || allowed_to_end_number(c)) {
5915                         const char *errstr = NULL;
5916
5917                         *p = '\0';
5918                         yylval.v.number = strtonum(buf, LLONG_MIN,
5919                             LLONG_MAX, &errstr);
5920                         if (errstr) {
5921                                 yyerror("\"%s\" invalid number: %s",
5922                                     buf, errstr);
5923                                 return (findeol());
5924                         }
5925                         return (NUMBER);
5926                 } else {
5927 nodigits:
5928                         while (p > buf + 1)
5929                                 lungetc(*--p);
5930                         c = *--p;
5931                         if (c == '-')
5932                                 return (c);
5933                 }
5934         }
5935
5936 #define allowed_in_string(x) \
5937         (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
5938         x != '{' && x != '}' && x != '<' && x != '>' && \
5939         x != '!' && x != '=' && x != '/' && x != '#' && \
5940         x != ','))
5941
5942         if (isalnum(c) || c == ':' || c == '_') {
5943                 do {
5944                         *p++ = c;
5945                         if ((unsigned)(p-buf) >= sizeof(buf)) {
5946                                 yyerror("string too long");
5947                                 return (findeol());
5948                         }
5949                 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
5950                 lungetc(c);
5951                 *p = '\0';
5952                 if ((token = lookup(buf)) == STRING)
5953                         if ((yylval.v.string = strdup(buf)) == NULL)
5954                                 err(1, "yylex: strdup");
5955                 return (token);
5956         }
5957         if (c == '\n') {
5958                 yylval.lineno = file->lineno;
5959                 file->lineno++;
5960         }
5961         if (c == EOF)
5962                 return (0);
5963         return (c);
5964 }
5965
5966 int
5967 check_file_secrecy(int fd, const char *fname)
5968 {
5969         struct stat     st;
5970
5971         if (fstat(fd, &st)) {
5972                 warn("cannot stat %s", fname);
5973                 return (-1);
5974         }
5975         if (st.st_uid != 0 && st.st_uid != getuid()) {
5976                 warnx("%s: owner not root or current user", fname);
5977                 return (-1);
5978         }
5979         if (st.st_mode & (S_IRWXG | S_IRWXO)) {
5980                 warnx("%s: group/world readable/writeable", fname);
5981                 return (-1);
5982         }
5983         return (0);
5984 }
5985
5986 struct file *
5987 pushfile(const char *name, int secret)
5988 {
5989         struct file     *nfile;
5990
5991         if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
5992             (nfile->name = strdup(name)) == NULL) {
5993                 warn("malloc");
5994                 return (NULL);
5995         }
5996         if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
5997                 nfile->stream = stdin;
5998                 free(nfile->name);
5999                 if ((nfile->name = strdup("stdin")) == NULL) {
6000                         warn("strdup");
6001                         free(nfile);
6002                         return (NULL);
6003                 }
6004         } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
6005                 warn("%s", nfile->name);
6006                 free(nfile->name);
6007                 free(nfile);
6008                 return (NULL);
6009         } else if (secret &&
6010             check_file_secrecy(fileno(nfile->stream), nfile->name)) {
6011                 fclose(nfile->stream);
6012                 free(nfile->name);
6013                 free(nfile);
6014                 return (NULL);
6015         }
6016         nfile->lineno = 1;
6017         TAILQ_INSERT_TAIL(&files, nfile, entry);
6018         return (nfile);
6019 }
6020
6021 int
6022 popfile(void)
6023 {
6024         struct file     *prev;
6025
6026         if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
6027                 prev->errors += file->errors;
6028                 TAILQ_REMOVE(&files, file, entry);
6029                 fclose(file->stream);
6030                 free(file->name);
6031                 free(file);
6032                 file = prev;
6033                 return (0);
6034         }
6035         return (EOF);
6036 }
6037
6038 int
6039 parse_config(char *filename, struct pfctl *xpf)
6040 {
6041         int              errors = 0;
6042         struct sym      *sym;
6043
6044         pf = xpf;
6045         errors = 0;
6046         rulestate = PFCTL_STATE_NONE;
6047         returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
6048         returnicmp6default =
6049             (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
6050         blockpolicy = PFRULE_DROP;
6051         failpolicy = PFRULE_DROP;
6052         require_order = 1;
6053
6054         if ((file = pushfile(filename, 0)) == NULL) {
6055                 warn("cannot open the main config file!");
6056                 return (-1);
6057         }
6058
6059         yyparse();
6060         errors = file->errors;
6061         popfile();
6062
6063         /* Free macros and check which have not been used. */
6064         while ((sym = TAILQ_FIRST(&symhead))) {
6065                 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
6066                         fprintf(stderr, "warning: macro '%s' not "
6067                             "used\n", sym->nam);
6068                 free(sym->nam);
6069                 free(sym->val);
6070                 TAILQ_REMOVE(&symhead, sym, entry);
6071                 free(sym);
6072         }
6073
6074         return (errors ? -1 : 0);
6075 }
6076
6077 int
6078 symset(const char *nam, const char *val, int persist)
6079 {
6080         struct sym      *sym;
6081
6082         for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
6083             sym = TAILQ_NEXT(sym, entry))
6084                 ;       /* nothing */
6085
6086         if (sym != NULL) {
6087                 if (sym->persist == 1)
6088                         return (0);
6089                 else {
6090                         free(sym->nam);
6091                         free(sym->val);
6092                         TAILQ_REMOVE(&symhead, sym, entry);
6093                         free(sym);
6094                 }
6095         }
6096         if ((sym = calloc(1, sizeof(*sym))) == NULL)
6097                 return (-1);
6098
6099         sym->nam = strdup(nam);
6100         if (sym->nam == NULL) {
6101                 free(sym);
6102                 return (-1);
6103         }
6104         sym->val = strdup(val);
6105         if (sym->val == NULL) {
6106                 free(sym->nam);
6107                 free(sym);
6108                 return (-1);
6109         }
6110         sym->used = 0;
6111         sym->persist = persist;
6112         TAILQ_INSERT_TAIL(&symhead, sym, entry);
6113         return (0);
6114 }
6115
6116 int
6117 pfctl_cmdline_symset(char *s)
6118 {
6119         char    *sym, *val;
6120         int      ret;
6121
6122         if ((val = strrchr(s, '=')) == NULL)
6123                 return (-1);
6124
6125         if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
6126                 err(1, "pfctl_cmdline_symset: malloc");
6127
6128         strlcpy(sym, s, strlen(s) - strlen(val) + 1);
6129
6130         ret = symset(sym, val + 1, 1);
6131         free(sym);
6132
6133         return (ret);
6134 }
6135
6136 char *
6137 symget(const char *nam)
6138 {
6139         struct sym      *sym;
6140
6141         TAILQ_FOREACH(sym, &symhead, entry)
6142                 if (strcmp(nam, sym->nam) == 0) {
6143                         sym->used = 1;
6144                         return (sym->val);
6145                 }
6146         return (NULL);
6147 }
6148
6149 void
6150 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst)
6151 {
6152         int i;
6153         struct pfctl_rule *r;
6154
6155         for (i = 0; i < PF_RULESET_MAX; ++i) {
6156                 while ((r = TAILQ_FIRST(src->rules[i].active.ptr))
6157                     != NULL) {
6158                         TAILQ_REMOVE(src->rules[i].active.ptr, r, entries);
6159                         TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries);
6160                         dst->anchor->match++;
6161                 }
6162                 src->anchor->match = 0;
6163                 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr))
6164                     != NULL) {
6165                         TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries);
6166                         TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr,
6167                                 r, entries);
6168                 }
6169         }
6170 }
6171
6172 void
6173 decide_address_family(struct node_host *n, sa_family_t *af)
6174 {
6175         if (*af != 0 || n == NULL)
6176                 return;
6177         *af = n->af;
6178         while ((n = n->next) != NULL) {
6179                 if (n->af != *af) {
6180                         *af = 0;
6181                         return;
6182                 }
6183         }
6184 }
6185
6186 void
6187 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
6188 {
6189         struct node_host        *n = *nh, *prev = NULL;
6190
6191         while (n != NULL) {
6192                 if (*af && n->af && n->af != *af) {
6193                         /* unlink and free n */
6194                         struct node_host *next = n->next;
6195
6196                         /* adjust tail pointer */
6197                         if (n == (*nh)->tail)
6198                                 (*nh)->tail = prev;
6199                         /* adjust previous node's next pointer */
6200                         if (prev == NULL)
6201                                 *nh = next;
6202                         else
6203                                 prev->next = next;
6204                         /* free node */
6205                         if (n->ifname != NULL)
6206                                 free(n->ifname);
6207                         free(n);
6208                         n = next;
6209                 } else {
6210                         if (n->af && !*af)
6211                                 *af = n->af;
6212                         prev = n;
6213                         n = n->next;
6214                 }
6215         }
6216 }
6217
6218 int
6219 invalid_redirect(struct node_host *nh, sa_family_t af)
6220 {
6221         if (!af) {
6222                 struct node_host *n;
6223
6224                 /* tables and dyniftl are ok without an address family */
6225                 for (n = nh; n != NULL; n = n->next) {
6226                         if (n->addr.type != PF_ADDR_TABLE &&
6227                             n->addr.type != PF_ADDR_DYNIFTL) {
6228                                 yyerror("address family not given and "
6229                                     "translation address expands to multiple "
6230                                     "address families");
6231                                 return (1);
6232                         }
6233                 }
6234         }
6235         if (nh == NULL) {
6236                 yyerror("no translation address with matching address family "
6237                     "found.");
6238                 return (1);
6239         }
6240         return (0);
6241 }
6242
6243 int
6244 atoul(char *s, u_long *ulvalp)
6245 {
6246         u_long   ulval;
6247         char    *ep;
6248
6249         errno = 0;
6250         ulval = strtoul(s, &ep, 0);
6251         if (s[0] == '\0' || *ep != '\0')
6252                 return (-1);
6253         if (errno == ERANGE && ulval == ULONG_MAX)
6254                 return (-1);
6255         *ulvalp = ulval;
6256         return (0);
6257 }
6258
6259 int
6260 getservice(char *n)
6261 {
6262         struct servent  *s;
6263         u_long           ulval;
6264
6265         if (atoul(n, &ulval) == 0) {
6266                 if (ulval > 65535) {
6267                         yyerror("illegal port value %lu", ulval);
6268                         return (-1);
6269                 }
6270                 return (htons(ulval));
6271         } else {
6272                 s = getservbyname(n, "tcp");
6273                 if (s == NULL)
6274                         s = getservbyname(n, "udp");
6275                 if (s == NULL) {
6276                         yyerror("unknown port %s", n);
6277                         return (-1);
6278                 }
6279                 return (s->s_port);
6280         }
6281 }
6282
6283 int
6284 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT])
6285 {
6286         for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) {
6287                 if (s[i] == NULL)
6288                         return (0);
6289
6290                 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >=
6291                     sizeof(r->label[0])) {
6292                         yyerror("rule label too long (max %d chars)",
6293                             sizeof(r->label[0])-1);
6294                         return (-1);
6295                 }
6296         }
6297         return (0);
6298 }
6299
6300 u_int16_t
6301 parseicmpspec(char *w, sa_family_t af)
6302 {
6303         const struct icmpcodeent        *p;
6304         u_long                           ulval;
6305         u_int8_t                         icmptype;
6306
6307         if (af == AF_INET)
6308                 icmptype = returnicmpdefault >> 8;
6309         else
6310                 icmptype = returnicmp6default >> 8;
6311
6312         if (atoul(w, &ulval) == -1) {
6313                 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
6314                         yyerror("unknown icmp code %s", w);
6315                         return (0);
6316                 }
6317                 ulval = p->code;
6318         }
6319         if (ulval > 255) {
6320                 yyerror("invalid icmp code %lu", ulval);
6321                 return (0);
6322         }
6323         return (icmptype << 8 | ulval);
6324 }
6325
6326 int
6327 parseport(char *port, struct range *r, int extensions)
6328 {
6329         char    *p = strchr(port, ':');
6330
6331         if (p == NULL) {
6332                 if ((r->a = getservice(port)) == -1)
6333                         return (-1);
6334                 r->b = 0;
6335                 r->t = PF_OP_NONE;
6336                 return (0);
6337         }
6338         if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
6339                 *p = 0;
6340                 if ((r->a = getservice(port)) == -1)
6341                         return (-1);
6342                 r->b = 0;
6343                 r->t = PF_OP_IRG;
6344                 return (0);
6345         }
6346         if ((extensions & PPORT_RANGE)) {
6347                 *p++ = 0;
6348                 if ((r->a = getservice(port)) == -1 ||
6349                     (r->b = getservice(p)) == -1)
6350                         return (-1);
6351                 if (r->a == r->b) {
6352                         r->b = 0;
6353                         r->t = PF_OP_NONE;
6354                 } else
6355                         r->t = PF_OP_RRG;
6356                 return (0);
6357         }
6358         return (-1);
6359 }
6360
6361 int
6362 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
6363 {
6364         struct loadanchors      *la;
6365
6366         TAILQ_FOREACH(la, &loadanchorshead, entries) {
6367                 if (pf->opts & PF_OPT_VERBOSE)
6368                         fprintf(stderr, "\nLoading anchor %s from %s\n",
6369                             la->anchorname, la->filename);
6370                 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
6371                     la->anchorname, trans) == -1)
6372                         return (-1);
6373         }
6374
6375         return (0);
6376 }
6377
6378 int
6379 kw_casecmp(const void *k, const void *e)
6380 {
6381         return (strcasecmp(k, ((const struct keywords *)e)->k_name));
6382 }
6383
6384 int
6385 map_tos(char *s, int *val)
6386 {
6387         /* DiffServ Codepoints and other TOS mappings */
6388         const struct keywords    toswords[] = {
6389                 { "af11",               IPTOS_DSCP_AF11 },
6390                 { "af12",               IPTOS_DSCP_AF12 },
6391                 { "af13",               IPTOS_DSCP_AF13 },
6392                 { "af21",               IPTOS_DSCP_AF21 },
6393                 { "af22",               IPTOS_DSCP_AF22 },
6394                 { "af23",               IPTOS_DSCP_AF23 },
6395                 { "af31",               IPTOS_DSCP_AF31 },
6396                 { "af32",               IPTOS_DSCP_AF32 },
6397                 { "af33",               IPTOS_DSCP_AF33 },
6398                 { "af41",               IPTOS_DSCP_AF41 },
6399                 { "af42",               IPTOS_DSCP_AF42 },
6400                 { "af43",               IPTOS_DSCP_AF43 },
6401                 { "critical",           IPTOS_PREC_CRITIC_ECP },
6402                 { "cs0",                IPTOS_DSCP_CS0 },
6403                 { "cs1",                IPTOS_DSCP_CS1 },
6404                 { "cs2",                IPTOS_DSCP_CS2 },
6405                 { "cs3",                IPTOS_DSCP_CS3 },
6406                 { "cs4",                IPTOS_DSCP_CS4 },
6407                 { "cs5",                IPTOS_DSCP_CS5 },
6408                 { "cs6",                IPTOS_DSCP_CS6 },
6409                 { "cs7",                IPTOS_DSCP_CS7 },
6410                 { "ef",                 IPTOS_DSCP_EF },
6411                 { "inetcontrol",        IPTOS_PREC_INTERNETCONTROL },
6412                 { "lowdelay",           IPTOS_LOWDELAY },
6413                 { "netcontrol",         IPTOS_PREC_NETCONTROL },
6414                 { "reliability",        IPTOS_RELIABILITY },
6415                 { "throughput",         IPTOS_THROUGHPUT },
6416                 { "va",                 IPTOS_DSCP_VA }
6417         };
6418         const struct keywords   *p;
6419
6420         p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]),
6421             sizeof(toswords[0]), kw_casecmp);
6422
6423         if (p) {
6424                 *val = p->k_val;
6425                 return (1);
6426         }
6427         return (0);
6428 }
6429
6430 int
6431 rt_tableid_max(void)
6432 {
6433 #ifdef __FreeBSD__
6434         int fibs;
6435         size_t l = sizeof(fibs);
6436
6437         if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1)
6438                 fibs = 16;      /* XXX RT_MAXFIBS, at least limit it some. */
6439         /*
6440          * As the OpenBSD code only compares > and not >= we need to adjust
6441          * here given we only accept values of 0..n and want to avoid #ifdefs
6442          * in the grammar.
6443          */
6444         return (fibs - 1);
6445 #else
6446         return (RT_TABLEID_MAX);
6447 #endif
6448 }