sbin/pfctl/parse.y

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