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