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