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