sbin/pfctl/parse.y

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