1 /* $OpenBSD: parse.y,v 1.554 2008/10/17 12:59:53 henning Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2001 Markus Friedl. All rights reserved. 7 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved. 8 * Copyright (c) 2001 Theo de Raadt. All rights reserved. 9 * Copyright (c) 2002,2003 Henning Brauer. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 %{ 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #define PFIOC_USE_LATEST 36 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <sys/stat.h> 40 #ifdef __FreeBSD__ 41 #include <sys/sysctl.h> 42 #endif 43 #include <net/if.h> 44 #include <netinet/in.h> 45 #include <netinet/in_systm.h> 46 #include <netinet/ip.h> 47 #include <netinet/ip_icmp.h> 48 #include <netinet/icmp6.h> 49 #include <net/pfvar.h> 50 #include <arpa/inet.h> 51 #include <net/altq/altq.h> 52 #include <net/altq/altq_cbq.h> 53 #include <net/altq/altq_codel.h> 54 #include <net/altq/altq_priq.h> 55 #include <net/altq/altq_hfsc.h> 56 #include <net/altq/altq_fairq.h> 57 58 #include <assert.h> 59 #include <stdio.h> 60 #include <unistd.h> 61 #include <stdlib.h> 62 #include <netdb.h> 63 #include <stdarg.h> 64 #include <errno.h> 65 #include <string.h> 66 #include <ctype.h> 67 #include <math.h> 68 #include <err.h> 69 #include <limits.h> 70 #include <pwd.h> 71 #include <grp.h> 72 #include <md5.h> 73 74 #include "pfctl_parser.h" 75 #include "pfctl.h" 76 77 static struct pfctl *pf = NULL; 78 static int debug = 0; 79 static int rulestate = 0; 80 static u_int16_t returnicmpdefault = 81 (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 82 static u_int16_t returnicmp6default = 83 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 84 static int blockpolicy = PFRULE_DROP; 85 static int failpolicy = PFRULE_DROP; 86 static int require_order = 1; 87 static int default_statelock; 88 89 static TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files); 90 static struct file { 91 TAILQ_ENTRY(file) entry; 92 FILE *stream; 93 char *name; 94 int lineno; 95 int errors; 96 } *file; 97 struct file *pushfile(const char *, int); 98 int popfile(void); 99 int check_file_secrecy(int, const char *); 100 int yyparse(void); 101 int yylex(void); 102 int yyerror(const char *, ...); 103 int kw_cmp(const void *, const void *); 104 int lookup(char *); 105 int lgetc(int); 106 int lungetc(int); 107 int findeol(void); 108 109 static TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 110 struct sym { 111 TAILQ_ENTRY(sym) entry; 112 int used; 113 int persist; 114 char *nam; 115 char *val; 116 }; 117 int symset(const char *, const char *, int); 118 char *symget(const char *); 119 120 int atoul(char *, u_long *); 121 122 enum { 123 PFCTL_STATE_NONE, 124 PFCTL_STATE_OPTION, 125 PFCTL_STATE_SCRUB, 126 PFCTL_STATE_QUEUE, 127 PFCTL_STATE_NAT, 128 PFCTL_STATE_FILTER 129 }; 130 131 struct node_proto { 132 u_int8_t proto; 133 struct node_proto *next; 134 struct node_proto *tail; 135 }; 136 137 struct node_port { 138 u_int16_t port[2]; 139 u_int8_t op; 140 struct node_port *next; 141 struct node_port *tail; 142 }; 143 144 struct node_uid { 145 uid_t uid[2]; 146 u_int8_t op; 147 struct node_uid *next; 148 struct node_uid *tail; 149 }; 150 151 struct node_gid { 152 gid_t gid[2]; 153 u_int8_t op; 154 struct node_gid *next; 155 struct node_gid *tail; 156 }; 157 158 struct node_icmp { 159 u_int8_t code; 160 u_int8_t type; 161 u_int8_t proto; 162 struct node_icmp *next; 163 struct node_icmp *tail; 164 }; 165 166 enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK, 167 PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN, 168 PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES, 169 PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK, 170 PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, }; 171 172 enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE }; 173 174 struct node_state_opt { 175 int type; 176 union { 177 u_int32_t max_states; 178 u_int32_t max_src_states; 179 u_int32_t max_src_conn; 180 struct { 181 u_int32_t limit; 182 u_int32_t seconds; 183 } max_src_conn_rate; 184 struct { 185 u_int8_t flush; 186 char tblname[PF_TABLE_NAME_SIZE]; 187 } overload; 188 u_int32_t max_src_nodes; 189 u_int8_t src_track; 190 u_int32_t statelock; 191 struct { 192 int number; 193 u_int32_t seconds; 194 } timeout; 195 } data; 196 struct node_state_opt *next; 197 struct node_state_opt *tail; 198 }; 199 200 struct peer { 201 struct node_host *host; 202 struct node_port *port; 203 }; 204 205 static struct node_queue { 206 char queue[PF_QNAME_SIZE]; 207 char parent[PF_QNAME_SIZE]; 208 char ifname[IFNAMSIZ]; 209 int scheduler; 210 struct node_queue *next; 211 struct node_queue *tail; 212 } *queues = NULL; 213 214 struct node_qassign { 215 char *qname; 216 char *pqname; 217 }; 218 219 static struct filter_opts { 220 int marker; 221 #define FOM_FLAGS 0x01 222 #define FOM_ICMP 0x02 223 #define FOM_TOS 0x04 224 #define FOM_KEEP 0x08 225 #define FOM_SRCTRACK 0x10 226 #define FOM_SETPRIO 0x0400 227 #define FOM_PRIO 0x2000 228 struct node_uid *uid; 229 struct node_gid *gid; 230 struct { 231 u_int8_t b1; 232 u_int8_t b2; 233 u_int16_t w; 234 u_int16_t w2; 235 } flags; 236 struct node_icmp *icmpspec; 237 u_int32_t tos; 238 u_int32_t prob; 239 struct { 240 int action; 241 struct node_state_opt *options; 242 } keep; 243 int fragment; 244 int allowopts; 245 char *label[PF_RULE_MAX_LABEL_COUNT]; 246 int labelcount; 247 struct node_qassign queues; 248 char *tag; 249 char *match_tag; 250 u_int8_t match_tag_not; 251 u_int rtableid; 252 u_int8_t prio; 253 u_int8_t set_prio[2]; 254 struct { 255 struct node_host *addr; 256 u_int16_t port; 257 } divert; 258 } filter_opts; 259 260 static struct antispoof_opts { 261 char *label[PF_RULE_MAX_LABEL_COUNT]; 262 int labelcount; 263 u_int rtableid; 264 } antispoof_opts; 265 266 static struct scrub_opts { 267 int marker; 268 #define SOM_MINTTL 0x01 269 #define SOM_MAXMSS 0x02 270 #define SOM_FRAGCACHE 0x04 271 #define SOM_SETTOS 0x08 272 int nodf; 273 int minttl; 274 int maxmss; 275 int settos; 276 int fragcache; 277 int randomid; 278 int reassemble_tcp; 279 char *match_tag; 280 u_int8_t match_tag_not; 281 u_int rtableid; 282 } scrub_opts; 283 284 static struct queue_opts { 285 int marker; 286 #define QOM_BWSPEC 0x01 287 #define QOM_SCHEDULER 0x02 288 #define QOM_PRIORITY 0x04 289 #define QOM_TBRSIZE 0x08 290 #define QOM_QLIMIT 0x10 291 struct node_queue_bw queue_bwspec; 292 struct node_queue_opt scheduler; 293 int priority; 294 unsigned int tbrsize; 295 int qlimit; 296 } queue_opts; 297 298 static struct table_opts { 299 int flags; 300 int init_addr; 301 struct node_tinithead init_nodes; 302 } table_opts; 303 304 static struct pool_opts { 305 int marker; 306 #define POM_TYPE 0x01 307 #define POM_STICKYADDRESS 0x02 308 u_int8_t opts; 309 int type; 310 int staticport; 311 struct pf_poolhashkey *key; 312 struct pf_mape_portset mape; 313 314 } pool_opts; 315 316 static struct codel_opts codel_opts; 317 static struct node_hfsc_opts hfsc_opts; 318 static struct node_fairq_opts fairq_opts; 319 static struct node_state_opt *keep_state_defaults = NULL; 320 321 int disallow_table(struct node_host *, const char *); 322 int disallow_urpf_failed(struct node_host *, const char *); 323 int disallow_alias(struct node_host *, const char *); 324 int rule_consistent(struct pfctl_rule *, int); 325 int filter_consistent(struct pfctl_rule *, int); 326 int nat_consistent(struct pfctl_rule *); 327 int rdr_consistent(struct pfctl_rule *); 328 int process_tabledef(char *, struct table_opts *); 329 void expand_label_str(char *, size_t, const char *, const char *); 330 void expand_label_if(const char *, char *, size_t, const char *); 331 void expand_label_addr(const char *, char *, size_t, u_int8_t, 332 struct node_host *); 333 void expand_label_port(const char *, char *, size_t, 334 struct node_port *); 335 void expand_label_proto(const char *, char *, size_t, u_int8_t); 336 void expand_label_nr(const char *, char *, size_t); 337 void expand_label(char *, size_t, const char *, u_int8_t, 338 struct node_host *, struct node_port *, struct node_host *, 339 struct node_port *, u_int8_t); 340 void expand_rule(struct pfctl_rule *, struct node_if *, 341 struct node_host *, struct node_proto *, struct node_os *, 342 struct node_host *, struct node_port *, struct node_host *, 343 struct node_port *, struct node_uid *, struct node_gid *, 344 struct node_icmp *, const char *); 345 int expand_altq(struct pf_altq *, struct node_if *, 346 struct node_queue *, struct node_queue_bw bwspec, 347 struct node_queue_opt *); 348 int expand_queue(struct pf_altq *, struct node_if *, 349 struct node_queue *, struct node_queue_bw, 350 struct node_queue_opt *); 351 int expand_skip_interface(struct node_if *); 352 353 int check_rulestate(int); 354 int getservice(char *); 355 int rule_label(struct pfctl_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]); 356 int rt_tableid_max(void); 357 358 void mv_rules(struct pfctl_ruleset *, struct pfctl_ruleset *); 359 void decide_address_family(struct node_host *, sa_family_t *); 360 void remove_invalid_hosts(struct node_host **, sa_family_t *); 361 int invalid_redirect(struct node_host *, sa_family_t); 362 u_int16_t parseicmpspec(char *, sa_family_t); 363 int kw_casecmp(const void *, const void *); 364 int map_tos(char *string, int *); 365 366 static TAILQ_HEAD(loadanchorshead, loadanchors) 367 loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead); 368 369 struct loadanchors { 370 TAILQ_ENTRY(loadanchors) entries; 371 char *anchorname; 372 char *filename; 373 }; 374 375 typedef struct { 376 union { 377 int64_t number; 378 double probability; 379 int i; 380 char *string; 381 u_int rtableid; 382 struct { 383 u_int8_t b1; 384 u_int8_t b2; 385 u_int16_t w; 386 u_int16_t w2; 387 } b; 388 struct range { 389 int a; 390 int b; 391 int t; 392 } range; 393 struct node_if *interface; 394 struct node_proto *proto; 395 struct node_icmp *icmp; 396 struct node_host *host; 397 struct node_os *os; 398 struct node_port *port; 399 struct node_uid *uid; 400 struct node_gid *gid; 401 struct node_state_opt *state_opt; 402 struct peer peer; 403 struct { 404 struct peer src, dst; 405 struct node_os *src_os; 406 } fromto; 407 struct { 408 struct node_host *host; 409 u_int8_t rt; 410 u_int8_t pool_opts; 411 sa_family_t af; 412 struct pf_poolhashkey *key; 413 } route; 414 struct redirection { 415 struct node_host *host; 416 struct range rport; 417 } *redirection; 418 struct { 419 int action; 420 struct node_state_opt *options; 421 } keep_state; 422 struct { 423 u_int8_t log; 424 u_int8_t logif; 425 u_int8_t quick; 426 } logquick; 427 struct { 428 int neg; 429 char *name; 430 } tagged; 431 struct pf_poolhashkey *hashkey; 432 struct node_queue *queue; 433 struct node_queue_opt queue_options; 434 struct node_queue_bw queue_bwspec; 435 struct node_qassign qassign; 436 struct filter_opts filter_opts; 437 struct antispoof_opts antispoof_opts; 438 struct queue_opts queue_opts; 439 struct scrub_opts scrub_opts; 440 struct table_opts table_opts; 441 struct pool_opts pool_opts; 442 struct node_hfsc_opts hfsc_opts; 443 struct node_fairq_opts fairq_opts; 444 struct codel_opts codel_opts; 445 } v; 446 int lineno; 447 } YYSTYPE; 448 449 #define PPORT_RANGE 1 450 #define PPORT_STAR 2 451 int parseport(char *, struct range *r, int); 452 453 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \ 454 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \ 455 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1]))) 456 457 %} 458 459 %token PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS 460 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 461 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 462 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 463 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 464 %token REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 465 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY 466 %token RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID 467 %token ANTISPOOF FOR INCLUDE KEEPCOUNTERS SYNCOOKIES 468 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET 469 %token ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME 470 %token UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL 471 %token LOAD RULESET_OPTIMIZATION PRIO 472 %token STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE 473 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY 474 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS 475 %token DIVERTTO DIVERTREPLY 476 %token <v.string> STRING 477 %token <v.number> NUMBER 478 %token <v.i> PORTBINARY 479 %type <v.interface> interface if_list if_item_not if_item 480 %type <v.number> number icmptype icmp6type uid gid 481 %type <v.number> tos not yesno 482 %type <v.probability> probability 483 %type <v.i> no dir af fragcache optimizer syncookie_val 484 %type <v.i> sourcetrack flush unaryop statelock 485 %type <v.b> action nataction natpasslog scrubaction 486 %type <v.b> flags flag blockspec prio 487 %type <v.range> portplain portstar portrange 488 %type <v.hashkey> hashkey 489 %type <v.proto> proto proto_list proto_item 490 %type <v.number> protoval 491 %type <v.icmp> icmpspec 492 %type <v.icmp> icmp_list icmp_item 493 %type <v.icmp> icmp6_list icmp6_item 494 %type <v.number> reticmpspec reticmp6spec 495 %type <v.fromto> fromto 496 %type <v.peer> ipportspec from to 497 %type <v.host> ipspec toipspec xhost host dynaddr host_list 498 %type <v.host> redir_host_list redirspec 499 %type <v.host> route_host route_host_list routespec 500 %type <v.os> os xos os_list 501 %type <v.port> portspec port_list port_item 502 %type <v.uid> uids uid_list uid_item 503 %type <v.gid> gids gid_list gid_item 504 %type <v.route> route 505 %type <v.redirection> redirection redirpool 506 %type <v.string> label stringall tag anchorname 507 %type <v.string> string varstring numberstring 508 %type <v.keep_state> keep 509 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item 510 %type <v.logquick> logquick quick log logopts logopt 511 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if 512 %type <v.qassign> qname 513 %type <v.queue> qassign qassign_list qassign_item 514 %type <v.queue_options> scheduler 515 %type <v.number> cbqflags_list cbqflags_item 516 %type <v.number> priqflags_list priqflags_item 517 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 518 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts 519 %type <v.codel_opts> codelopts_list codelopts_item codel_opts 520 %type <v.queue_bwspec> bandwidth 521 %type <v.filter_opts> filter_opts filter_opt filter_opts_l 522 %type <v.filter_opts> filter_sets filter_set filter_sets_l 523 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 524 %type <v.queue_opts> queue_opts queue_opt queue_opts_l 525 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 526 %type <v.table_opts> table_opts table_opt table_opts_l 527 %type <v.pool_opts> pool_opts pool_opt pool_opts_l 528 %type <v.tagged> tagged 529 %type <v.rtableid> rtable 530 %% 531 532 ruleset : /* empty */ 533 | ruleset include '\n' 534 | ruleset '\n' 535 | ruleset option '\n' 536 | ruleset scrubrule '\n' 537 | ruleset natrule '\n' 538 | ruleset binatrule '\n' 539 | ruleset pfrule '\n' 540 | ruleset anchorrule '\n' 541 | ruleset loadrule '\n' 542 | ruleset altqif '\n' 543 | ruleset queuespec '\n' 544 | ruleset varset '\n' 545 | ruleset antispoof '\n' 546 | ruleset tabledef '\n' 547 | '{' fakeanchor '}' '\n'; 548 | ruleset error '\n' { file->errors++; } 549 ; 550 551 include : INCLUDE STRING { 552 struct file *nfile; 553 554 if ((nfile = pushfile($2, 0)) == NULL) { 555 yyerror("failed to include file %s", $2); 556 free($2); 557 YYERROR; 558 } 559 free($2); 560 561 file = nfile; 562 lungetc('\n'); 563 } 564 ; 565 566 /* 567 * apply to previouslys specified rule: must be careful to note 568 * what that is: pf or nat or binat or rdr 569 */ 570 fakeanchor : fakeanchor '\n' 571 | fakeanchor anchorrule '\n' 572 | fakeanchor binatrule '\n' 573 | fakeanchor natrule '\n' 574 | fakeanchor pfrule '\n' 575 | fakeanchor error '\n' 576 ; 577 578 optimizer : string { 579 if (!strcmp($1, "none")) 580 $$ = 0; 581 else if (!strcmp($1, "basic")) 582 $$ = PF_OPTIMIZE_BASIC; 583 else if (!strcmp($1, "profile")) 584 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE; 585 else { 586 yyerror("unknown ruleset-optimization %s", $1); 587 YYERROR; 588 } 589 } 590 ; 591 592 option : SET OPTIMIZATION STRING { 593 if (check_rulestate(PFCTL_STATE_OPTION)) { 594 free($3); 595 YYERROR; 596 } 597 if (pfctl_set_optimization(pf, $3) != 0) { 598 yyerror("unknown optimization %s", $3); 599 free($3); 600 YYERROR; 601 } 602 free($3); 603 } 604 | SET RULESET_OPTIMIZATION optimizer { 605 if (!(pf->opts & PF_OPT_OPTIMIZE)) { 606 pf->opts |= PF_OPT_OPTIMIZE; 607 pf->optimize = $3; 608 } 609 } 610 | SET TIMEOUT timeout_spec 611 | SET TIMEOUT '{' optnl timeout_list '}' 612 | SET LIMIT limit_spec 613 | SET LIMIT '{' optnl limit_list '}' 614 | SET LOGINTERFACE stringall { 615 if (check_rulestate(PFCTL_STATE_OPTION)) { 616 free($3); 617 YYERROR; 618 } 619 if (pfctl_set_logif(pf, $3) != 0) { 620 yyerror("error setting loginterface %s", $3); 621 free($3); 622 YYERROR; 623 } 624 free($3); 625 } 626 | SET HOSTID number { 627 if ($3 == 0 || $3 > UINT_MAX) { 628 yyerror("hostid must be non-zero"); 629 YYERROR; 630 } 631 if (pfctl_set_hostid(pf, $3) != 0) { 632 yyerror("error setting hostid %08x", $3); 633 YYERROR; 634 } 635 } 636 | SET BLOCKPOLICY DROP { 637 if (pf->opts & PF_OPT_VERBOSE) 638 printf("set block-policy drop\n"); 639 if (check_rulestate(PFCTL_STATE_OPTION)) 640 YYERROR; 641 blockpolicy = PFRULE_DROP; 642 } 643 | SET BLOCKPOLICY RETURN { 644 if (pf->opts & PF_OPT_VERBOSE) 645 printf("set block-policy return\n"); 646 if (check_rulestate(PFCTL_STATE_OPTION)) 647 YYERROR; 648 blockpolicy = PFRULE_RETURN; 649 } 650 | SET FAILPOLICY DROP { 651 if (pf->opts & PF_OPT_VERBOSE) 652 printf("set fail-policy drop\n"); 653 if (check_rulestate(PFCTL_STATE_OPTION)) 654 YYERROR; 655 failpolicy = PFRULE_DROP; 656 } 657 | SET FAILPOLICY RETURN { 658 if (pf->opts & PF_OPT_VERBOSE) 659 printf("set fail-policy return\n"); 660 if (check_rulestate(PFCTL_STATE_OPTION)) 661 YYERROR; 662 failpolicy = PFRULE_RETURN; 663 } 664 | SET REQUIREORDER yesno { 665 if (pf->opts & PF_OPT_VERBOSE) 666 printf("set require-order %s\n", 667 $3 == 1 ? "yes" : "no"); 668 require_order = $3; 669 } 670 | SET FINGERPRINTS STRING { 671 if (pf->opts & PF_OPT_VERBOSE) 672 printf("set fingerprints \"%s\"\n", $3); 673 if (check_rulestate(PFCTL_STATE_OPTION)) { 674 free($3); 675 YYERROR; 676 } 677 if (!pf->anchor->name[0]) { 678 if (pfctl_file_fingerprints(pf->dev, 679 pf->opts, $3)) { 680 yyerror("error loading " 681 "fingerprints %s", $3); 682 free($3); 683 YYERROR; 684 } 685 } 686 free($3); 687 } 688 | SET STATEPOLICY statelock { 689 if (pf->opts & PF_OPT_VERBOSE) 690 switch ($3) { 691 case 0: 692 printf("set state-policy floating\n"); 693 break; 694 case PFRULE_IFBOUND: 695 printf("set state-policy if-bound\n"); 696 break; 697 } 698 default_statelock = $3; 699 } 700 | SET DEBUG STRING { 701 if (check_rulestate(PFCTL_STATE_OPTION)) { 702 free($3); 703 YYERROR; 704 } 705 if (pfctl_set_debug(pf, $3) != 0) { 706 yyerror("error setting debuglevel %s", $3); 707 free($3); 708 YYERROR; 709 } 710 free($3); 711 } 712 | SET SKIP interface { 713 if (expand_skip_interface($3) != 0) { 714 yyerror("error setting skip interface(s)"); 715 YYERROR; 716 } 717 } 718 | SET STATEDEFAULTS state_opt_list { 719 if (keep_state_defaults != NULL) { 720 yyerror("cannot redefine state-defaults"); 721 YYERROR; 722 } 723 keep_state_defaults = $3; 724 } 725 | SET KEEPCOUNTERS { 726 pf->keep_counters = true; 727 } 728 | SET SYNCOOKIES syncookie_val { 729 pf->syncookies = $3; 730 } 731 ; 732 733 syncookie_val : STRING { 734 if (!strcmp($1, "never")) 735 $$ = PFCTL_SYNCOOKIES_NEVER; 736 else if (!strcmp($1, "always")) 737 $$ = PFCTL_SYNCOOKIES_ALWAYS; 738 else { 739 yyerror("illegal value for syncookies"); 740 YYERROR; 741 } 742 } 743 ; 744 745 stringall : STRING { $$ = $1; } 746 | ALL { 747 if (($$ = strdup("all")) == NULL) { 748 err(1, "stringall: strdup"); 749 } 750 } 751 ; 752 753 string : STRING string { 754 if (asprintf(&$$, "%s %s", $1, $2) == -1) 755 err(1, "string: asprintf"); 756 free($1); 757 free($2); 758 } 759 | STRING 760 ; 761 762 varstring : numberstring varstring { 763 if (asprintf(&$$, "%s %s", $1, $2) == -1) 764 err(1, "string: asprintf"); 765 free($1); 766 free($2); 767 } 768 | numberstring 769 ; 770 771 numberstring : NUMBER { 772 char *s; 773 if (asprintf(&s, "%lld", (long long)$1) == -1) { 774 yyerror("string: asprintf"); 775 YYERROR; 776 } 777 $$ = s; 778 } 779 | STRING 780 ; 781 782 varset : STRING '=' varstring { 783 char *s = $1; 784 if (pf->opts & PF_OPT_VERBOSE) 785 printf("%s = \"%s\"\n", $1, $3); 786 while (*s++) { 787 if (isspace((unsigned char)*s)) { 788 yyerror("macro name cannot contain " 789 "whitespace"); 790 YYERROR; 791 } 792 } 793 if (symset($1, $3, 0) == -1) 794 err(1, "cannot store variable %s", $1); 795 free($1); 796 free($3); 797 } 798 ; 799 800 anchorname : STRING { $$ = $1; } 801 | /* empty */ { $$ = NULL; } 802 ; 803 804 pfa_anchorlist : /* empty */ 805 | pfa_anchorlist '\n' 806 | pfa_anchorlist pfrule '\n' 807 | pfa_anchorlist anchorrule '\n' 808 ; 809 810 pfa_anchor : '{' 811 { 812 char ta[PF_ANCHOR_NAME_SIZE]; 813 struct pfctl_ruleset *rs; 814 815 /* steping into a brace anchor */ 816 pf->asd++; 817 pf->bn++; 818 pf->brace = 1; 819 820 /* create a holding ruleset in the root */ 821 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 822 rs = pf_find_or_create_ruleset(ta); 823 if (rs == NULL) 824 err(1, "pfa_anchor: pf_find_or_create_ruleset"); 825 pf->astack[pf->asd] = rs->anchor; 826 pf->anchor = rs->anchor; 827 } '\n' pfa_anchorlist '}' 828 { 829 pf->alast = pf->anchor; 830 pf->asd--; 831 pf->anchor = pf->astack[pf->asd]; 832 } 833 | /* empty */ 834 ; 835 836 anchorrule : ANCHOR anchorname dir quick interface af proto fromto 837 filter_opts pfa_anchor 838 { 839 struct pfctl_rule r; 840 struct node_proto *proto; 841 842 if (check_rulestate(PFCTL_STATE_FILTER)) { 843 if ($2) 844 free($2); 845 YYERROR; 846 } 847 848 if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) { 849 free($2); 850 yyerror("anchor names beginning with '_' " 851 "are reserved for internal use"); 852 YYERROR; 853 } 854 855 memset(&r, 0, sizeof(r)); 856 if (pf->astack[pf->asd + 1]) { 857 /* move inline rules into relative location */ 858 pfctl_anchor_setup(&r, 859 &pf->astack[pf->asd]->ruleset, 860 $2 ? $2 : pf->alast->name); 861 862 if (r.anchor == NULL) 863 err(1, "anchorrule: unable to " 864 "create ruleset"); 865 866 if (pf->alast != r.anchor) { 867 if (r.anchor->match) { 868 yyerror("inline anchor '%s' " 869 "already exists", 870 r.anchor->name); 871 YYERROR; 872 } 873 mv_rules(&pf->alast->ruleset, 874 &r.anchor->ruleset); 875 } 876 pf_remove_if_empty_ruleset(&pf->alast->ruleset); 877 pf->alast = r.anchor; 878 } else { 879 if (!$2) { 880 yyerror("anchors without explicit " 881 "rules must specify a name"); 882 YYERROR; 883 } 884 } 885 r.direction = $3; 886 r.quick = $4.quick; 887 r.af = $6; 888 r.prob = $9.prob; 889 r.rtableid = $9.rtableid; 890 891 if ($9.tag) 892 if (strlcpy(r.tagname, $9.tag, 893 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 894 yyerror("tag too long, max %u chars", 895 PF_TAG_NAME_SIZE - 1); 896 YYERROR; 897 } 898 if ($9.match_tag) 899 if (strlcpy(r.match_tagname, $9.match_tag, 900 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 901 yyerror("tag too long, max %u chars", 902 PF_TAG_NAME_SIZE - 1); 903 YYERROR; 904 } 905 r.match_tag_not = $9.match_tag_not; 906 if (rule_label(&r, $9.label)) 907 YYERROR; 908 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 909 free($9.label[i]); 910 r.flags = $9.flags.b1; 911 r.flagset = $9.flags.b2; 912 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 913 yyerror("flags always false"); 914 YYERROR; 915 } 916 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 917 for (proto = $7; proto != NULL && 918 proto->proto != IPPROTO_TCP; 919 proto = proto->next) 920 ; /* nothing */ 921 if (proto == NULL && $7 != NULL) { 922 if ($9.flags.b1 || $9.flags.b2) 923 yyerror( 924 "flags only apply to tcp"); 925 if ($8.src_os) 926 yyerror( 927 "OS fingerprinting only " 928 "applies to tcp"); 929 YYERROR; 930 } 931 } 932 933 r.tos = $9.tos; 934 935 if ($9.keep.action) { 936 yyerror("cannot specify state handling " 937 "on anchors"); 938 YYERROR; 939 } 940 941 if ($9.match_tag) 942 if (strlcpy(r.match_tagname, $9.match_tag, 943 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 944 yyerror("tag too long, max %u chars", 945 PF_TAG_NAME_SIZE - 1); 946 YYERROR; 947 } 948 r.match_tag_not = $9.match_tag_not; 949 if ($9.marker & FOM_PRIO) { 950 if ($9.prio == 0) 951 r.prio = PF_PRIO_ZERO; 952 else 953 r.prio = $9.prio; 954 } 955 if ($9.marker & FOM_SETPRIO) { 956 r.set_prio[0] = $9.set_prio[0]; 957 r.set_prio[1] = $9.set_prio[1]; 958 r.scrub_flags |= PFSTATE_SETPRIO; 959 } 960 961 decide_address_family($8.src.host, &r.af); 962 decide_address_family($8.dst.host, &r.af); 963 964 expand_rule(&r, $5, NULL, $7, $8.src_os, 965 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 966 $9.uid, $9.gid, $9.icmpspec, 967 pf->astack[pf->asd + 1] ? pf->alast->name : $2); 968 free($2); 969 pf->astack[pf->asd + 1] = NULL; 970 } 971 | NATANCHOR string interface af proto fromto rtable { 972 struct pfctl_rule r; 973 974 if (check_rulestate(PFCTL_STATE_NAT)) { 975 free($2); 976 YYERROR; 977 } 978 979 memset(&r, 0, sizeof(r)); 980 r.action = PF_NAT; 981 r.af = $4; 982 r.rtableid = $7; 983 984 decide_address_family($6.src.host, &r.af); 985 decide_address_family($6.dst.host, &r.af); 986 987 expand_rule(&r, $3, NULL, $5, $6.src_os, 988 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 989 0, 0, 0, $2); 990 free($2); 991 } 992 | RDRANCHOR string interface af proto fromto rtable { 993 struct pfctl_rule r; 994 995 if (check_rulestate(PFCTL_STATE_NAT)) { 996 free($2); 997 YYERROR; 998 } 999 1000 memset(&r, 0, sizeof(r)); 1001 r.action = PF_RDR; 1002 r.af = $4; 1003 r.rtableid = $7; 1004 1005 decide_address_family($6.src.host, &r.af); 1006 decide_address_family($6.dst.host, &r.af); 1007 1008 if ($6.src.port != NULL) { 1009 yyerror("source port parameter not supported" 1010 " in rdr-anchor"); 1011 YYERROR; 1012 } 1013 if ($6.dst.port != NULL) { 1014 if ($6.dst.port->next != NULL) { 1015 yyerror("destination port list " 1016 "expansion not supported in " 1017 "rdr-anchor"); 1018 YYERROR; 1019 } else if ($6.dst.port->op != PF_OP_EQ) { 1020 yyerror("destination port operators" 1021 " not supported in rdr-anchor"); 1022 YYERROR; 1023 } 1024 r.dst.port[0] = $6.dst.port->port[0]; 1025 r.dst.port[1] = $6.dst.port->port[1]; 1026 r.dst.port_op = $6.dst.port->op; 1027 } 1028 1029 expand_rule(&r, $3, NULL, $5, $6.src_os, 1030 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 1031 0, 0, 0, $2); 1032 free($2); 1033 } 1034 | BINATANCHOR string interface af proto fromto rtable { 1035 struct pfctl_rule r; 1036 1037 if (check_rulestate(PFCTL_STATE_NAT)) { 1038 free($2); 1039 YYERROR; 1040 } 1041 1042 memset(&r, 0, sizeof(r)); 1043 r.action = PF_BINAT; 1044 r.af = $4; 1045 r.rtableid = $7; 1046 if ($5 != NULL) { 1047 if ($5->next != NULL) { 1048 yyerror("proto list expansion" 1049 " not supported in binat-anchor"); 1050 YYERROR; 1051 } 1052 r.proto = $5->proto; 1053 free($5); 1054 } 1055 1056 if ($6.src.host != NULL || $6.src.port != NULL || 1057 $6.dst.host != NULL || $6.dst.port != NULL) { 1058 yyerror("fromto parameter not supported" 1059 " in binat-anchor"); 1060 YYERROR; 1061 } 1062 1063 decide_address_family($6.src.host, &r.af); 1064 decide_address_family($6.dst.host, &r.af); 1065 1066 pfctl_append_rule(pf, &r, $2); 1067 free($2); 1068 } 1069 ; 1070 1071 loadrule : LOAD ANCHOR string FROM string { 1072 struct loadanchors *loadanchor; 1073 1074 if (strlen(pf->anchor->name) + 1 + 1075 strlen($3) >= MAXPATHLEN) { 1076 yyerror("anchorname %s too long, max %u\n", 1077 $3, MAXPATHLEN - 1); 1078 free($3); 1079 YYERROR; 1080 } 1081 loadanchor = calloc(1, sizeof(struct loadanchors)); 1082 if (loadanchor == NULL) 1083 err(1, "loadrule: calloc"); 1084 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) == 1085 NULL) 1086 err(1, "loadrule: malloc"); 1087 if (pf->anchor->name[0]) 1088 snprintf(loadanchor->anchorname, MAXPATHLEN, 1089 "%s/%s", pf->anchor->name, $3); 1090 else 1091 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN); 1092 if ((loadanchor->filename = strdup($5)) == NULL) 1093 err(1, "loadrule: strdup"); 1094 1095 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 1096 entries); 1097 1098 free($3); 1099 free($5); 1100 }; 1101 1102 scrubaction : no SCRUB { 1103 $$.b2 = $$.w = 0; 1104 if ($1) 1105 $$.b1 = PF_NOSCRUB; 1106 else 1107 $$.b1 = PF_SCRUB; 1108 } 1109 ; 1110 1111 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts 1112 { 1113 struct pfctl_rule r; 1114 1115 if (check_rulestate(PFCTL_STATE_SCRUB)) 1116 YYERROR; 1117 1118 memset(&r, 0, sizeof(r)); 1119 1120 r.action = $1.b1; 1121 r.direction = $2; 1122 1123 r.log = $3.log; 1124 r.logif = $3.logif; 1125 if ($3.quick) { 1126 yyerror("scrub rules do not support 'quick'"); 1127 YYERROR; 1128 } 1129 1130 r.af = $5; 1131 if ($8.nodf) 1132 r.rule_flag |= PFRULE_NODF; 1133 if ($8.randomid) 1134 r.rule_flag |= PFRULE_RANDOMID; 1135 if ($8.reassemble_tcp) { 1136 if (r.direction != PF_INOUT) { 1137 yyerror("reassemble tcp rules can not " 1138 "specify direction"); 1139 YYERROR; 1140 } 1141 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 1142 } 1143 if ($8.minttl) 1144 r.min_ttl = $8.minttl; 1145 if ($8.maxmss) 1146 r.max_mss = $8.maxmss; 1147 if ($8.marker & SOM_SETTOS) { 1148 r.rule_flag |= PFRULE_SET_TOS; 1149 r.set_tos = $8.settos; 1150 } 1151 if ($8.fragcache) 1152 r.rule_flag |= $8.fragcache; 1153 if ($8.match_tag) 1154 if (strlcpy(r.match_tagname, $8.match_tag, 1155 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1156 yyerror("tag too long, max %u chars", 1157 PF_TAG_NAME_SIZE - 1); 1158 YYERROR; 1159 } 1160 r.match_tag_not = $8.match_tag_not; 1161 r.rtableid = $8.rtableid; 1162 1163 expand_rule(&r, $4, NULL, $6, $7.src_os, 1164 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 1165 NULL, NULL, NULL, ""); 1166 } 1167 ; 1168 1169 scrub_opts : { 1170 bzero(&scrub_opts, sizeof scrub_opts); 1171 scrub_opts.rtableid = -1; 1172 } 1173 scrub_opts_l 1174 { $$ = scrub_opts; } 1175 | /* empty */ { 1176 bzero(&scrub_opts, sizeof scrub_opts); 1177 scrub_opts.rtableid = -1; 1178 $$ = scrub_opts; 1179 } 1180 ; 1181 1182 scrub_opts_l : scrub_opts_l scrub_opt 1183 | scrub_opt 1184 ; 1185 1186 scrub_opt : NODF { 1187 if (scrub_opts.nodf) { 1188 yyerror("no-df cannot be respecified"); 1189 YYERROR; 1190 } 1191 scrub_opts.nodf = 1; 1192 } 1193 | MINTTL NUMBER { 1194 if (scrub_opts.marker & SOM_MINTTL) { 1195 yyerror("min-ttl cannot be respecified"); 1196 YYERROR; 1197 } 1198 if ($2 < 0 || $2 > 255) { 1199 yyerror("illegal min-ttl value %d", $2); 1200 YYERROR; 1201 } 1202 scrub_opts.marker |= SOM_MINTTL; 1203 scrub_opts.minttl = $2; 1204 } 1205 | MAXMSS NUMBER { 1206 if (scrub_opts.marker & SOM_MAXMSS) { 1207 yyerror("max-mss cannot be respecified"); 1208 YYERROR; 1209 } 1210 if ($2 < 0 || $2 > 65535) { 1211 yyerror("illegal max-mss value %d", $2); 1212 YYERROR; 1213 } 1214 scrub_opts.marker |= SOM_MAXMSS; 1215 scrub_opts.maxmss = $2; 1216 } 1217 | SETTOS tos { 1218 if (scrub_opts.marker & SOM_SETTOS) { 1219 yyerror("set-tos cannot be respecified"); 1220 YYERROR; 1221 } 1222 scrub_opts.marker |= SOM_SETTOS; 1223 scrub_opts.settos = $2; 1224 } 1225 | fragcache { 1226 if (scrub_opts.marker & SOM_FRAGCACHE) { 1227 yyerror("fragcache cannot be respecified"); 1228 YYERROR; 1229 } 1230 scrub_opts.marker |= SOM_FRAGCACHE; 1231 scrub_opts.fragcache = $1; 1232 } 1233 | REASSEMBLE STRING { 1234 if (strcasecmp($2, "tcp") != 0) { 1235 yyerror("scrub reassemble supports only tcp, " 1236 "not '%s'", $2); 1237 free($2); 1238 YYERROR; 1239 } 1240 free($2); 1241 if (scrub_opts.reassemble_tcp) { 1242 yyerror("reassemble tcp cannot be respecified"); 1243 YYERROR; 1244 } 1245 scrub_opts.reassemble_tcp = 1; 1246 } 1247 | RANDOMID { 1248 if (scrub_opts.randomid) { 1249 yyerror("random-id cannot be respecified"); 1250 YYERROR; 1251 } 1252 scrub_opts.randomid = 1; 1253 } 1254 | RTABLE NUMBER { 1255 if ($2 < 0 || $2 > rt_tableid_max()) { 1256 yyerror("invalid rtable id"); 1257 YYERROR; 1258 } 1259 scrub_opts.rtableid = $2; 1260 } 1261 | not TAGGED string { 1262 scrub_opts.match_tag = $3; 1263 scrub_opts.match_tag_not = $1; 1264 } 1265 ; 1266 1267 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 1268 | FRAGMENT FRAGCROP { $$ = 0; } 1269 | FRAGMENT FRAGDROP { $$ = 0; } 1270 ; 1271 1272 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 1273 struct pfctl_rule r; 1274 struct node_host *h = NULL, *hh; 1275 struct node_if *i, *j; 1276 1277 if (check_rulestate(PFCTL_STATE_FILTER)) 1278 YYERROR; 1279 1280 for (i = $3; i; i = i->next) { 1281 bzero(&r, sizeof(r)); 1282 1283 r.action = PF_DROP; 1284 r.direction = PF_IN; 1285 r.log = $2.log; 1286 r.logif = $2.logif; 1287 r.quick = $2.quick; 1288 r.af = $4; 1289 if (rule_label(&r, $5.label)) 1290 YYERROR; 1291 r.rtableid = $5.rtableid; 1292 j = calloc(1, sizeof(struct node_if)); 1293 if (j == NULL) 1294 err(1, "antispoof: calloc"); 1295 if (strlcpy(j->ifname, i->ifname, 1296 sizeof(j->ifname)) >= sizeof(j->ifname)) { 1297 free(j); 1298 yyerror("interface name too long"); 1299 YYERROR; 1300 } 1301 j->not = 1; 1302 if (i->dynamic) { 1303 h = calloc(1, sizeof(*h)); 1304 if (h == NULL) 1305 err(1, "address: calloc"); 1306 h->addr.type = PF_ADDR_DYNIFTL; 1307 set_ipmask(h, 128); 1308 if (strlcpy(h->addr.v.ifname, i->ifname, 1309 sizeof(h->addr.v.ifname)) >= 1310 sizeof(h->addr.v.ifname)) { 1311 free(h); 1312 yyerror( 1313 "interface name too long"); 1314 YYERROR; 1315 } 1316 hh = malloc(sizeof(*hh)); 1317 if (hh == NULL) 1318 err(1, "address: malloc"); 1319 bcopy(h, hh, sizeof(*hh)); 1320 h->addr.iflags = PFI_AFLAG_NETWORK; 1321 } else { 1322 h = ifa_lookup(j->ifname, 1323 PFI_AFLAG_NETWORK); 1324 hh = NULL; 1325 } 1326 1327 if (h != NULL) 1328 expand_rule(&r, j, NULL, NULL, NULL, h, 1329 NULL, NULL, NULL, NULL, NULL, 1330 NULL, ""); 1331 1332 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 1333 bzero(&r, sizeof(r)); 1334 1335 r.action = PF_DROP; 1336 r.direction = PF_IN; 1337 r.log = $2.log; 1338 r.logif = $2.logif; 1339 r.quick = $2.quick; 1340 r.af = $4; 1341 if (rule_label(&r, $5.label)) 1342 YYERROR; 1343 r.rtableid = $5.rtableid; 1344 if (hh != NULL) 1345 h = hh; 1346 else 1347 h = ifa_lookup(i->ifname, 0); 1348 if (h != NULL) 1349 expand_rule(&r, NULL, NULL, 1350 NULL, NULL, h, NULL, NULL, 1351 NULL, NULL, NULL, NULL, ""); 1352 } else 1353 free(hh); 1354 } 1355 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1356 free($5.label[i]); 1357 } 1358 ; 1359 1360 antispoof_ifspc : FOR antispoof_if { $$ = $2; } 1361 | FOR '{' optnl antispoof_iflst '}' { $$ = $4; } 1362 ; 1363 1364 antispoof_iflst : antispoof_if optnl { $$ = $1; } 1365 | antispoof_iflst comma antispoof_if optnl { 1366 $1->tail->next = $3; 1367 $1->tail = $3; 1368 $$ = $1; 1369 } 1370 ; 1371 1372 antispoof_if : if_item { $$ = $1; } 1373 | '(' if_item ')' { 1374 $2->dynamic = 1; 1375 $$ = $2; 1376 } 1377 ; 1378 1379 antispoof_opts : { 1380 bzero(&antispoof_opts, sizeof antispoof_opts); 1381 antispoof_opts.rtableid = -1; 1382 } 1383 antispoof_opts_l 1384 { $$ = antispoof_opts; } 1385 | /* empty */ { 1386 bzero(&antispoof_opts, sizeof antispoof_opts); 1387 antispoof_opts.rtableid = -1; 1388 $$ = antispoof_opts; 1389 } 1390 ; 1391 1392 antispoof_opts_l : antispoof_opts_l antispoof_opt 1393 | antispoof_opt 1394 ; 1395 1396 antispoof_opt : label { 1397 if (antispoof_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 1398 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 1399 YYERROR; 1400 } 1401 antispoof_opts.label[antispoof_opts.labelcount++] = $1; 1402 } 1403 | RTABLE NUMBER { 1404 if ($2 < 0 || $2 > rt_tableid_max()) { 1405 yyerror("invalid rtable id"); 1406 YYERROR; 1407 } 1408 antispoof_opts.rtableid = $2; 1409 } 1410 ; 1411 1412 not : '!' { $$ = 1; } 1413 | /* empty */ { $$ = 0; } 1414 ; 1415 1416 tabledef : TABLE '<' STRING '>' table_opts { 1417 struct node_host *h, *nh; 1418 struct node_tinit *ti, *nti; 1419 1420 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 1421 yyerror("table name too long, max %d chars", 1422 PF_TABLE_NAME_SIZE - 1); 1423 free($3); 1424 YYERROR; 1425 } 1426 if (pf->loadopt & PFCTL_FLAG_TABLE) 1427 if (process_tabledef($3, &$5)) { 1428 free($3); 1429 YYERROR; 1430 } 1431 free($3); 1432 for (ti = SIMPLEQ_FIRST(&$5.init_nodes); 1433 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) { 1434 if (ti->file) 1435 free(ti->file); 1436 for (h = ti->host; h != NULL; h = nh) { 1437 nh = h->next; 1438 free(h); 1439 } 1440 nti = SIMPLEQ_NEXT(ti, entries); 1441 free(ti); 1442 } 1443 } 1444 ; 1445 1446 table_opts : { 1447 bzero(&table_opts, sizeof table_opts); 1448 SIMPLEQ_INIT(&table_opts.init_nodes); 1449 } 1450 table_opts_l 1451 { $$ = table_opts; } 1452 | /* empty */ 1453 { 1454 bzero(&table_opts, sizeof table_opts); 1455 SIMPLEQ_INIT(&table_opts.init_nodes); 1456 $$ = table_opts; 1457 } 1458 ; 1459 1460 table_opts_l : table_opts_l table_opt 1461 | table_opt 1462 ; 1463 1464 table_opt : STRING { 1465 if (!strcmp($1, "const")) 1466 table_opts.flags |= PFR_TFLAG_CONST; 1467 else if (!strcmp($1, "persist")) 1468 table_opts.flags |= PFR_TFLAG_PERSIST; 1469 else if (!strcmp($1, "counters")) 1470 table_opts.flags |= PFR_TFLAG_COUNTERS; 1471 else { 1472 yyerror("invalid table option '%s'", $1); 1473 free($1); 1474 YYERROR; 1475 } 1476 free($1); 1477 } 1478 | '{' optnl '}' { table_opts.init_addr = 1; } 1479 | '{' optnl host_list '}' { 1480 struct node_host *n; 1481 struct node_tinit *ti; 1482 1483 for (n = $3; n != NULL; n = n->next) { 1484 switch (n->addr.type) { 1485 case PF_ADDR_ADDRMASK: 1486 continue; /* ok */ 1487 case PF_ADDR_RANGE: 1488 yyerror("address ranges are not " 1489 "permitted inside tables"); 1490 break; 1491 case PF_ADDR_DYNIFTL: 1492 yyerror("dynamic addresses are not " 1493 "permitted inside tables"); 1494 break; 1495 case PF_ADDR_TABLE: 1496 yyerror("tables cannot contain tables"); 1497 break; 1498 case PF_ADDR_NOROUTE: 1499 yyerror("\"no-route\" is not permitted " 1500 "inside tables"); 1501 break; 1502 case PF_ADDR_URPFFAILED: 1503 yyerror("\"urpf-failed\" is not " 1504 "permitted inside tables"); 1505 break; 1506 default: 1507 yyerror("unknown address type %d", 1508 n->addr.type); 1509 } 1510 YYERROR; 1511 } 1512 if (!(ti = calloc(1, sizeof(*ti)))) 1513 err(1, "table_opt: calloc"); 1514 ti->host = $3; 1515 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1516 entries); 1517 table_opts.init_addr = 1; 1518 } 1519 | FILENAME STRING { 1520 struct node_tinit *ti; 1521 1522 if (!(ti = calloc(1, sizeof(*ti)))) 1523 err(1, "table_opt: calloc"); 1524 ti->file = $2; 1525 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1526 entries); 1527 table_opts.init_addr = 1; 1528 } 1529 ; 1530 1531 altqif : ALTQ interface queue_opts QUEUE qassign { 1532 struct pf_altq a; 1533 1534 if (check_rulestate(PFCTL_STATE_QUEUE)) 1535 YYERROR; 1536 1537 memset(&a, 0, sizeof(a)); 1538 if ($3.scheduler.qtype == ALTQT_NONE) { 1539 yyerror("no scheduler specified!"); 1540 YYERROR; 1541 } 1542 a.scheduler = $3.scheduler.qtype; 1543 a.qlimit = $3.qlimit; 1544 a.tbrsize = $3.tbrsize; 1545 if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) { 1546 yyerror("no child queues specified"); 1547 YYERROR; 1548 } 1549 if (expand_altq(&a, $2, $5, $3.queue_bwspec, 1550 &$3.scheduler)) 1551 YYERROR; 1552 } 1553 ; 1554 1555 queuespec : QUEUE STRING interface queue_opts qassign { 1556 struct pf_altq a; 1557 1558 if (check_rulestate(PFCTL_STATE_QUEUE)) { 1559 free($2); 1560 YYERROR; 1561 } 1562 1563 memset(&a, 0, sizeof(a)); 1564 1565 if (strlcpy(a.qname, $2, sizeof(a.qname)) >= 1566 sizeof(a.qname)) { 1567 yyerror("queue name too long (max " 1568 "%d chars)", PF_QNAME_SIZE-1); 1569 free($2); 1570 YYERROR; 1571 } 1572 free($2); 1573 if ($4.tbrsize) { 1574 yyerror("cannot specify tbrsize for queue"); 1575 YYERROR; 1576 } 1577 if ($4.priority > 255) { 1578 yyerror("priority out of range: max 255"); 1579 YYERROR; 1580 } 1581 a.priority = $4.priority; 1582 a.qlimit = $4.qlimit; 1583 a.scheduler = $4.scheduler.qtype; 1584 if (expand_queue(&a, $3, $5, $4.queue_bwspec, 1585 &$4.scheduler)) { 1586 yyerror("errors in queue definition"); 1587 YYERROR; 1588 } 1589 } 1590 ; 1591 1592 queue_opts : { 1593 bzero(&queue_opts, sizeof queue_opts); 1594 queue_opts.priority = DEFAULT_PRIORITY; 1595 queue_opts.qlimit = DEFAULT_QLIMIT; 1596 queue_opts.scheduler.qtype = ALTQT_NONE; 1597 queue_opts.queue_bwspec.bw_percent = 100; 1598 } 1599 queue_opts_l 1600 { $$ = queue_opts; } 1601 | /* empty */ { 1602 bzero(&queue_opts, sizeof queue_opts); 1603 queue_opts.priority = DEFAULT_PRIORITY; 1604 queue_opts.qlimit = DEFAULT_QLIMIT; 1605 queue_opts.scheduler.qtype = ALTQT_NONE; 1606 queue_opts.queue_bwspec.bw_percent = 100; 1607 $$ = queue_opts; 1608 } 1609 ; 1610 1611 queue_opts_l : queue_opts_l queue_opt 1612 | queue_opt 1613 ; 1614 1615 queue_opt : BANDWIDTH bandwidth { 1616 if (queue_opts.marker & QOM_BWSPEC) { 1617 yyerror("bandwidth cannot be respecified"); 1618 YYERROR; 1619 } 1620 queue_opts.marker |= QOM_BWSPEC; 1621 queue_opts.queue_bwspec = $2; 1622 } 1623 | PRIORITY NUMBER { 1624 if (queue_opts.marker & QOM_PRIORITY) { 1625 yyerror("priority cannot be respecified"); 1626 YYERROR; 1627 } 1628 if ($2 < 0 || $2 > 255) { 1629 yyerror("priority out of range: max 255"); 1630 YYERROR; 1631 } 1632 queue_opts.marker |= QOM_PRIORITY; 1633 queue_opts.priority = $2; 1634 } 1635 | QLIMIT NUMBER { 1636 if (queue_opts.marker & QOM_QLIMIT) { 1637 yyerror("qlimit cannot be respecified"); 1638 YYERROR; 1639 } 1640 if ($2 < 0 || $2 > 65535) { 1641 yyerror("qlimit out of range: max 65535"); 1642 YYERROR; 1643 } 1644 queue_opts.marker |= QOM_QLIMIT; 1645 queue_opts.qlimit = $2; 1646 } 1647 | scheduler { 1648 if (queue_opts.marker & QOM_SCHEDULER) { 1649 yyerror("scheduler cannot be respecified"); 1650 YYERROR; 1651 } 1652 queue_opts.marker |= QOM_SCHEDULER; 1653 queue_opts.scheduler = $1; 1654 } 1655 | TBRSIZE NUMBER { 1656 if (queue_opts.marker & QOM_TBRSIZE) { 1657 yyerror("tbrsize cannot be respecified"); 1658 YYERROR; 1659 } 1660 if ($2 < 0 || $2 > UINT_MAX) { 1661 yyerror("tbrsize too big: max %u", UINT_MAX); 1662 YYERROR; 1663 } 1664 queue_opts.marker |= QOM_TBRSIZE; 1665 queue_opts.tbrsize = $2; 1666 } 1667 ; 1668 1669 bandwidth : STRING { 1670 double bps; 1671 char *cp; 1672 1673 $$.bw_percent = 0; 1674 1675 bps = strtod($1, &cp); 1676 if (cp != NULL) { 1677 if (strlen(cp) > 1) { 1678 char *cu = cp + 1; 1679 if (!strcmp(cu, "Bit") || 1680 !strcmp(cu, "B") || 1681 !strcmp(cu, "bit") || 1682 !strcmp(cu, "b")) { 1683 *cu = 0; 1684 } 1685 } 1686 if (!strcmp(cp, "b")) 1687 ; /* nothing */ 1688 else if (!strcmp(cp, "K")) 1689 bps *= 1000; 1690 else if (!strcmp(cp, "M")) 1691 bps *= 1000 * 1000; 1692 else if (!strcmp(cp, "G")) 1693 bps *= 1000 * 1000 * 1000; 1694 else if (!strcmp(cp, "%")) { 1695 if (bps < 0 || bps > 100) { 1696 yyerror("bandwidth spec " 1697 "out of range"); 1698 free($1); 1699 YYERROR; 1700 } 1701 $$.bw_percent = bps; 1702 bps = 0; 1703 } else { 1704 yyerror("unknown unit %s", cp); 1705 free($1); 1706 YYERROR; 1707 } 1708 } 1709 free($1); 1710 $$.bw_absolute = (u_int64_t)bps; 1711 } 1712 | NUMBER { 1713 if ($1 < 0 || $1 >= LLONG_MAX) { 1714 yyerror("bandwidth number too big"); 1715 YYERROR; 1716 } 1717 $$.bw_percent = 0; 1718 $$.bw_absolute = $1; 1719 } 1720 ; 1721 1722 scheduler : CBQ { 1723 $$.qtype = ALTQT_CBQ; 1724 $$.data.cbq_opts.flags = 0; 1725 } 1726 | CBQ '(' cbqflags_list ')' { 1727 $$.qtype = ALTQT_CBQ; 1728 $$.data.cbq_opts.flags = $3; 1729 } 1730 | PRIQ { 1731 $$.qtype = ALTQT_PRIQ; 1732 $$.data.priq_opts.flags = 0; 1733 } 1734 | PRIQ '(' priqflags_list ')' { 1735 $$.qtype = ALTQT_PRIQ; 1736 $$.data.priq_opts.flags = $3; 1737 } 1738 | HFSC { 1739 $$.qtype = ALTQT_HFSC; 1740 bzero(&$$.data.hfsc_opts, 1741 sizeof(struct node_hfsc_opts)); 1742 } 1743 | HFSC '(' hfsc_opts ')' { 1744 $$.qtype = ALTQT_HFSC; 1745 $$.data.hfsc_opts = $3; 1746 } 1747 | FAIRQ { 1748 $$.qtype = ALTQT_FAIRQ; 1749 bzero(&$$.data.fairq_opts, 1750 sizeof(struct node_fairq_opts)); 1751 } 1752 | FAIRQ '(' fairq_opts ')' { 1753 $$.qtype = ALTQT_FAIRQ; 1754 $$.data.fairq_opts = $3; 1755 } 1756 | CODEL { 1757 $$.qtype = ALTQT_CODEL; 1758 bzero(&$$.data.codel_opts, 1759 sizeof(struct codel_opts)); 1760 } 1761 | CODEL '(' codel_opts ')' { 1762 $$.qtype = ALTQT_CODEL; 1763 $$.data.codel_opts = $3; 1764 } 1765 ; 1766 1767 cbqflags_list : cbqflags_item { $$ |= $1; } 1768 | cbqflags_list comma cbqflags_item { $$ |= $3; } 1769 ; 1770 1771 cbqflags_item : STRING { 1772 if (!strcmp($1, "default")) 1773 $$ = CBQCLF_DEFCLASS; 1774 else if (!strcmp($1, "borrow")) 1775 $$ = CBQCLF_BORROW; 1776 else if (!strcmp($1, "red")) 1777 $$ = CBQCLF_RED; 1778 else if (!strcmp($1, "ecn")) 1779 $$ = CBQCLF_RED|CBQCLF_ECN; 1780 else if (!strcmp($1, "rio")) 1781 $$ = CBQCLF_RIO; 1782 else if (!strcmp($1, "codel")) 1783 $$ = CBQCLF_CODEL; 1784 else { 1785 yyerror("unknown cbq flag \"%s\"", $1); 1786 free($1); 1787 YYERROR; 1788 } 1789 free($1); 1790 } 1791 ; 1792 1793 priqflags_list : priqflags_item { $$ |= $1; } 1794 | priqflags_list comma priqflags_item { $$ |= $3; } 1795 ; 1796 1797 priqflags_item : STRING { 1798 if (!strcmp($1, "default")) 1799 $$ = PRCF_DEFAULTCLASS; 1800 else if (!strcmp($1, "red")) 1801 $$ = PRCF_RED; 1802 else if (!strcmp($1, "ecn")) 1803 $$ = PRCF_RED|PRCF_ECN; 1804 else if (!strcmp($1, "rio")) 1805 $$ = PRCF_RIO; 1806 else if (!strcmp($1, "codel")) 1807 $$ = PRCF_CODEL; 1808 else { 1809 yyerror("unknown priq flag \"%s\"", $1); 1810 free($1); 1811 YYERROR; 1812 } 1813 free($1); 1814 } 1815 ; 1816 1817 hfsc_opts : { 1818 bzero(&hfsc_opts, 1819 sizeof(struct node_hfsc_opts)); 1820 } 1821 hfscopts_list { 1822 $$ = hfsc_opts; 1823 } 1824 ; 1825 1826 hfscopts_list : hfscopts_item 1827 | hfscopts_list comma hfscopts_item 1828 ; 1829 1830 hfscopts_item : LINKSHARE bandwidth { 1831 if (hfsc_opts.linkshare.used) { 1832 yyerror("linkshare already specified"); 1833 YYERROR; 1834 } 1835 hfsc_opts.linkshare.m2 = $2; 1836 hfsc_opts.linkshare.used = 1; 1837 } 1838 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')' 1839 { 1840 if ($5 < 0 || $5 > INT_MAX) { 1841 yyerror("timing in curve out of range"); 1842 YYERROR; 1843 } 1844 if (hfsc_opts.linkshare.used) { 1845 yyerror("linkshare already specified"); 1846 YYERROR; 1847 } 1848 hfsc_opts.linkshare.m1 = $3; 1849 hfsc_opts.linkshare.d = $5; 1850 hfsc_opts.linkshare.m2 = $7; 1851 hfsc_opts.linkshare.used = 1; 1852 } 1853 | REALTIME bandwidth { 1854 if (hfsc_opts.realtime.used) { 1855 yyerror("realtime already specified"); 1856 YYERROR; 1857 } 1858 hfsc_opts.realtime.m2 = $2; 1859 hfsc_opts.realtime.used = 1; 1860 } 1861 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')' 1862 { 1863 if ($5 < 0 || $5 > INT_MAX) { 1864 yyerror("timing in curve out of range"); 1865 YYERROR; 1866 } 1867 if (hfsc_opts.realtime.used) { 1868 yyerror("realtime already specified"); 1869 YYERROR; 1870 } 1871 hfsc_opts.realtime.m1 = $3; 1872 hfsc_opts.realtime.d = $5; 1873 hfsc_opts.realtime.m2 = $7; 1874 hfsc_opts.realtime.used = 1; 1875 } 1876 | UPPERLIMIT bandwidth { 1877 if (hfsc_opts.upperlimit.used) { 1878 yyerror("upperlimit already specified"); 1879 YYERROR; 1880 } 1881 hfsc_opts.upperlimit.m2 = $2; 1882 hfsc_opts.upperlimit.used = 1; 1883 } 1884 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')' 1885 { 1886 if ($5 < 0 || $5 > INT_MAX) { 1887 yyerror("timing in curve out of range"); 1888 YYERROR; 1889 } 1890 if (hfsc_opts.upperlimit.used) { 1891 yyerror("upperlimit already specified"); 1892 YYERROR; 1893 } 1894 hfsc_opts.upperlimit.m1 = $3; 1895 hfsc_opts.upperlimit.d = $5; 1896 hfsc_opts.upperlimit.m2 = $7; 1897 hfsc_opts.upperlimit.used = 1; 1898 } 1899 | STRING { 1900 if (!strcmp($1, "default")) 1901 hfsc_opts.flags |= HFCF_DEFAULTCLASS; 1902 else if (!strcmp($1, "red")) 1903 hfsc_opts.flags |= HFCF_RED; 1904 else if (!strcmp($1, "ecn")) 1905 hfsc_opts.flags |= HFCF_RED|HFCF_ECN; 1906 else if (!strcmp($1, "rio")) 1907 hfsc_opts.flags |= HFCF_RIO; 1908 else if (!strcmp($1, "codel")) 1909 hfsc_opts.flags |= HFCF_CODEL; 1910 else { 1911 yyerror("unknown hfsc flag \"%s\"", $1); 1912 free($1); 1913 YYERROR; 1914 } 1915 free($1); 1916 } 1917 ; 1918 1919 fairq_opts : { 1920 bzero(&fairq_opts, 1921 sizeof(struct node_fairq_opts)); 1922 } 1923 fairqopts_list { 1924 $$ = fairq_opts; 1925 } 1926 ; 1927 1928 fairqopts_list : fairqopts_item 1929 | fairqopts_list comma fairqopts_item 1930 ; 1931 1932 fairqopts_item : LINKSHARE bandwidth { 1933 if (fairq_opts.linkshare.used) { 1934 yyerror("linkshare already specified"); 1935 YYERROR; 1936 } 1937 fairq_opts.linkshare.m2 = $2; 1938 fairq_opts.linkshare.used = 1; 1939 } 1940 | LINKSHARE '(' bandwidth number bandwidth ')' { 1941 if (fairq_opts.linkshare.used) { 1942 yyerror("linkshare already specified"); 1943 YYERROR; 1944 } 1945 fairq_opts.linkshare.m1 = $3; 1946 fairq_opts.linkshare.d = $4; 1947 fairq_opts.linkshare.m2 = $5; 1948 fairq_opts.linkshare.used = 1; 1949 } 1950 | HOGS bandwidth { 1951 fairq_opts.hogs_bw = $2; 1952 } 1953 | BUCKETS number { 1954 fairq_opts.nbuckets = $2; 1955 } 1956 | STRING { 1957 if (!strcmp($1, "default")) 1958 fairq_opts.flags |= FARF_DEFAULTCLASS; 1959 else if (!strcmp($1, "red")) 1960 fairq_opts.flags |= FARF_RED; 1961 else if (!strcmp($1, "ecn")) 1962 fairq_opts.flags |= FARF_RED|FARF_ECN; 1963 else if (!strcmp($1, "rio")) 1964 fairq_opts.flags |= FARF_RIO; 1965 else if (!strcmp($1, "codel")) 1966 fairq_opts.flags |= FARF_CODEL; 1967 else { 1968 yyerror("unknown fairq flag \"%s\"", $1); 1969 free($1); 1970 YYERROR; 1971 } 1972 free($1); 1973 } 1974 ; 1975 1976 codel_opts : { 1977 bzero(&codel_opts, 1978 sizeof(struct codel_opts)); 1979 } 1980 codelopts_list { 1981 $$ = codel_opts; 1982 } 1983 ; 1984 1985 codelopts_list : codelopts_item 1986 | codelopts_list comma codelopts_item 1987 ; 1988 1989 codelopts_item : INTERVAL number { 1990 if (codel_opts.interval) { 1991 yyerror("interval already specified"); 1992 YYERROR; 1993 } 1994 codel_opts.interval = $2; 1995 } 1996 | TARGET number { 1997 if (codel_opts.target) { 1998 yyerror("target already specified"); 1999 YYERROR; 2000 } 2001 codel_opts.target = $2; 2002 } 2003 | STRING { 2004 if (!strcmp($1, "ecn")) 2005 codel_opts.ecn = 1; 2006 else { 2007 yyerror("unknown codel option \"%s\"", $1); 2008 free($1); 2009 YYERROR; 2010 } 2011 free($1); 2012 } 2013 ; 2014 2015 qassign : /* empty */ { $$ = NULL; } 2016 | qassign_item { $$ = $1; } 2017 | '{' optnl qassign_list '}' { $$ = $3; } 2018 ; 2019 2020 qassign_list : qassign_item optnl { $$ = $1; } 2021 | qassign_list comma qassign_item optnl { 2022 $1->tail->next = $3; 2023 $1->tail = $3; 2024 $$ = $1; 2025 } 2026 ; 2027 2028 qassign_item : STRING { 2029 $$ = calloc(1, sizeof(struct node_queue)); 2030 if ($$ == NULL) 2031 err(1, "qassign_item: calloc"); 2032 if (strlcpy($$->queue, $1, sizeof($$->queue)) >= 2033 sizeof($$->queue)) { 2034 yyerror("queue name '%s' too long (max " 2035 "%d chars)", $1, sizeof($$->queue)-1); 2036 free($1); 2037 free($$); 2038 YYERROR; 2039 } 2040 free($1); 2041 $$->next = NULL; 2042 $$->tail = $$; 2043 } 2044 ; 2045 2046 pfrule : action dir logquick interface route af proto fromto 2047 filter_opts 2048 { 2049 struct pfctl_rule r; 2050 struct node_state_opt *o; 2051 struct node_proto *proto; 2052 int srctrack = 0; 2053 int statelock = 0; 2054 int adaptive = 0; 2055 int defaults = 0; 2056 2057 if (check_rulestate(PFCTL_STATE_FILTER)) 2058 YYERROR; 2059 2060 memset(&r, 0, sizeof(r)); 2061 2062 r.action = $1.b1; 2063 switch ($1.b2) { 2064 case PFRULE_RETURNRST: 2065 r.rule_flag |= PFRULE_RETURNRST; 2066 r.return_ttl = $1.w; 2067 break; 2068 case PFRULE_RETURNICMP: 2069 r.rule_flag |= PFRULE_RETURNICMP; 2070 r.return_icmp = $1.w; 2071 r.return_icmp6 = $1.w2; 2072 break; 2073 case PFRULE_RETURN: 2074 r.rule_flag |= PFRULE_RETURN; 2075 r.return_icmp = $1.w; 2076 r.return_icmp6 = $1.w2; 2077 break; 2078 } 2079 r.direction = $2; 2080 r.log = $3.log; 2081 r.logif = $3.logif; 2082 r.quick = $3.quick; 2083 r.prob = $9.prob; 2084 r.rtableid = $9.rtableid; 2085 2086 if ($9.marker & FOM_PRIO) { 2087 if ($9.prio == 0) 2088 r.prio = PF_PRIO_ZERO; 2089 else 2090 r.prio = $9.prio; 2091 } 2092 if ($9.marker & FOM_SETPRIO) { 2093 r.set_prio[0] = $9.set_prio[0]; 2094 r.set_prio[1] = $9.set_prio[1]; 2095 r.scrub_flags |= PFSTATE_SETPRIO; 2096 } 2097 2098 r.af = $6; 2099 if ($9.tag) 2100 if (strlcpy(r.tagname, $9.tag, 2101 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 2102 yyerror("tag too long, max %u chars", 2103 PF_TAG_NAME_SIZE - 1); 2104 YYERROR; 2105 } 2106 if ($9.match_tag) 2107 if (strlcpy(r.match_tagname, $9.match_tag, 2108 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 2109 yyerror("tag too long, max %u chars", 2110 PF_TAG_NAME_SIZE - 1); 2111 YYERROR; 2112 } 2113 r.match_tag_not = $9.match_tag_not; 2114 if (rule_label(&r, $9.label)) 2115 YYERROR; 2116 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 2117 free($9.label[i]); 2118 r.flags = $9.flags.b1; 2119 r.flagset = $9.flags.b2; 2120 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 2121 yyerror("flags always false"); 2122 YYERROR; 2123 } 2124 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 2125 for (proto = $7; proto != NULL && 2126 proto->proto != IPPROTO_TCP; 2127 proto = proto->next) 2128 ; /* nothing */ 2129 if (proto == NULL && $7 != NULL) { 2130 if ($9.flags.b1 || $9.flags.b2) 2131 yyerror( 2132 "flags only apply to tcp"); 2133 if ($8.src_os) 2134 yyerror( 2135 "OS fingerprinting only " 2136 "apply to tcp"); 2137 YYERROR; 2138 } 2139 #if 0 2140 if (($9.flags.b1 & parse_flags("S")) == 0 && 2141 $8.src_os) { 2142 yyerror("OS fingerprinting requires " 2143 "the SYN TCP flag (flags S/SA)"); 2144 YYERROR; 2145 } 2146 #endif 2147 } 2148 2149 r.tos = $9.tos; 2150 r.keep_state = $9.keep.action; 2151 o = $9.keep.options; 2152 2153 /* 'keep state' by default on pass rules. */ 2154 if (!r.keep_state && !r.action && 2155 !($9.marker & FOM_KEEP)) { 2156 r.keep_state = PF_STATE_NORMAL; 2157 o = keep_state_defaults; 2158 defaults = 1; 2159 } 2160 2161 while (o) { 2162 struct node_state_opt *p = o; 2163 2164 switch (o->type) { 2165 case PF_STATE_OPT_MAX: 2166 if (r.max_states) { 2167 yyerror("state option 'max' " 2168 "multiple definitions"); 2169 YYERROR; 2170 } 2171 r.max_states = o->data.max_states; 2172 break; 2173 case PF_STATE_OPT_NOSYNC: 2174 if (r.rule_flag & PFRULE_NOSYNC) { 2175 yyerror("state option 'sync' " 2176 "multiple definitions"); 2177 YYERROR; 2178 } 2179 r.rule_flag |= PFRULE_NOSYNC; 2180 break; 2181 case PF_STATE_OPT_SRCTRACK: 2182 if (srctrack) { 2183 yyerror("state option " 2184 "'source-track' " 2185 "multiple definitions"); 2186 YYERROR; 2187 } 2188 srctrack = o->data.src_track; 2189 r.rule_flag |= PFRULE_SRCTRACK; 2190 break; 2191 case PF_STATE_OPT_MAX_SRC_STATES: 2192 if (r.max_src_states) { 2193 yyerror("state option " 2194 "'max-src-states' " 2195 "multiple definitions"); 2196 YYERROR; 2197 } 2198 if (o->data.max_src_states == 0) { 2199 yyerror("'max-src-states' must " 2200 "be > 0"); 2201 YYERROR; 2202 } 2203 r.max_src_states = 2204 o->data.max_src_states; 2205 r.rule_flag |= PFRULE_SRCTRACK; 2206 break; 2207 case PF_STATE_OPT_OVERLOAD: 2208 if (r.overload_tblname[0]) { 2209 yyerror("multiple 'overload' " 2210 "table definitions"); 2211 YYERROR; 2212 } 2213 if (strlcpy(r.overload_tblname, 2214 o->data.overload.tblname, 2215 PF_TABLE_NAME_SIZE) >= 2216 PF_TABLE_NAME_SIZE) { 2217 yyerror("state option: " 2218 "strlcpy"); 2219 YYERROR; 2220 } 2221 r.flush = o->data.overload.flush; 2222 break; 2223 case PF_STATE_OPT_MAX_SRC_CONN: 2224 if (r.max_src_conn) { 2225 yyerror("state option " 2226 "'max-src-conn' " 2227 "multiple definitions"); 2228 YYERROR; 2229 } 2230 if (o->data.max_src_conn == 0) { 2231 yyerror("'max-src-conn' " 2232 "must be > 0"); 2233 YYERROR; 2234 } 2235 r.max_src_conn = 2236 o->data.max_src_conn; 2237 r.rule_flag |= PFRULE_SRCTRACK | 2238 PFRULE_RULESRCTRACK; 2239 break; 2240 case PF_STATE_OPT_MAX_SRC_CONN_RATE: 2241 if (r.max_src_conn_rate.limit) { 2242 yyerror("state option " 2243 "'max-src-conn-rate' " 2244 "multiple definitions"); 2245 YYERROR; 2246 } 2247 if (!o->data.max_src_conn_rate.limit || 2248 !o->data.max_src_conn_rate.seconds) { 2249 yyerror("'max-src-conn-rate' " 2250 "values must be > 0"); 2251 YYERROR; 2252 } 2253 if (o->data.max_src_conn_rate.limit > 2254 PF_THRESHOLD_MAX) { 2255 yyerror("'max-src-conn-rate' " 2256 "maximum rate must be < %u", 2257 PF_THRESHOLD_MAX); 2258 YYERROR; 2259 } 2260 r.max_src_conn_rate.limit = 2261 o->data.max_src_conn_rate.limit; 2262 r.max_src_conn_rate.seconds = 2263 o->data.max_src_conn_rate.seconds; 2264 r.rule_flag |= PFRULE_SRCTRACK | 2265 PFRULE_RULESRCTRACK; 2266 break; 2267 case PF_STATE_OPT_MAX_SRC_NODES: 2268 if (r.max_src_nodes) { 2269 yyerror("state option " 2270 "'max-src-nodes' " 2271 "multiple definitions"); 2272 YYERROR; 2273 } 2274 if (o->data.max_src_nodes == 0) { 2275 yyerror("'max-src-nodes' must " 2276 "be > 0"); 2277 YYERROR; 2278 } 2279 r.max_src_nodes = 2280 o->data.max_src_nodes; 2281 r.rule_flag |= PFRULE_SRCTRACK | 2282 PFRULE_RULESRCTRACK; 2283 break; 2284 case PF_STATE_OPT_STATELOCK: 2285 if (statelock) { 2286 yyerror("state locking option: " 2287 "multiple definitions"); 2288 YYERROR; 2289 } 2290 statelock = 1; 2291 r.rule_flag |= o->data.statelock; 2292 break; 2293 case PF_STATE_OPT_SLOPPY: 2294 if (r.rule_flag & PFRULE_STATESLOPPY) { 2295 yyerror("state sloppy option: " 2296 "multiple definitions"); 2297 YYERROR; 2298 } 2299 r.rule_flag |= PFRULE_STATESLOPPY; 2300 break; 2301 case PF_STATE_OPT_TIMEOUT: 2302 if (o->data.timeout.number == 2303 PFTM_ADAPTIVE_START || 2304 o->data.timeout.number == 2305 PFTM_ADAPTIVE_END) 2306 adaptive = 1; 2307 if (r.timeout[o->data.timeout.number]) { 2308 yyerror("state timeout %s " 2309 "multiple definitions", 2310 pf_timeouts[o->data. 2311 timeout.number].name); 2312 YYERROR; 2313 } 2314 r.timeout[o->data.timeout.number] = 2315 o->data.timeout.seconds; 2316 } 2317 o = o->next; 2318 if (!defaults) 2319 free(p); 2320 } 2321 2322 /* 'flags S/SA' by default on stateful rules */ 2323 if (!r.action && !r.flags && !r.flagset && 2324 !$9.fragment && !($9.marker & FOM_FLAGS) && 2325 r.keep_state) { 2326 r.flags = parse_flags("S"); 2327 r.flagset = parse_flags("SA"); 2328 } 2329 if (!adaptive && r.max_states) { 2330 r.timeout[PFTM_ADAPTIVE_START] = 2331 (r.max_states / 10) * 6; 2332 r.timeout[PFTM_ADAPTIVE_END] = 2333 (r.max_states / 10) * 12; 2334 } 2335 if (r.rule_flag & PFRULE_SRCTRACK) { 2336 if (srctrack == PF_SRCTRACK_GLOBAL && 2337 r.max_src_nodes) { 2338 yyerror("'max-src-nodes' is " 2339 "incompatible with " 2340 "'source-track global'"); 2341 YYERROR; 2342 } 2343 if (srctrack == PF_SRCTRACK_GLOBAL && 2344 r.max_src_conn) { 2345 yyerror("'max-src-conn' is " 2346 "incompatible with " 2347 "'source-track global'"); 2348 YYERROR; 2349 } 2350 if (srctrack == PF_SRCTRACK_GLOBAL && 2351 r.max_src_conn_rate.seconds) { 2352 yyerror("'max-src-conn-rate' is " 2353 "incompatible with " 2354 "'source-track global'"); 2355 YYERROR; 2356 } 2357 if (r.timeout[PFTM_SRC_NODE] < 2358 r.max_src_conn_rate.seconds) 2359 r.timeout[PFTM_SRC_NODE] = 2360 r.max_src_conn_rate.seconds; 2361 r.rule_flag |= PFRULE_SRCTRACK; 2362 if (srctrack == PF_SRCTRACK_RULE) 2363 r.rule_flag |= PFRULE_RULESRCTRACK; 2364 } 2365 if (r.keep_state && !statelock) 2366 r.rule_flag |= default_statelock; 2367 2368 if ($9.fragment) 2369 r.rule_flag |= PFRULE_FRAGMENT; 2370 r.allow_opts = $9.allowopts; 2371 2372 decide_address_family($8.src.host, &r.af); 2373 decide_address_family($8.dst.host, &r.af); 2374 2375 if ($5.rt) { 2376 if (!r.direction) { 2377 yyerror("direction must be explicit " 2378 "with rules that specify routing"); 2379 YYERROR; 2380 } 2381 r.rt = $5.rt; 2382 r.rpool.opts = $5.pool_opts; 2383 if ($5.key != NULL) 2384 memcpy(&r.rpool.key, $5.key, 2385 sizeof(struct pf_poolhashkey)); 2386 } 2387 if (r.rt) { 2388 decide_address_family($5.host, &r.af); 2389 remove_invalid_hosts(&$5.host, &r.af); 2390 if ($5.host == NULL) { 2391 yyerror("no routing address with " 2392 "matching address family found."); 2393 YYERROR; 2394 } 2395 if ((r.rpool.opts & PF_POOL_TYPEMASK) == 2396 PF_POOL_NONE && ($5.host->next != NULL || 2397 $5.host->addr.type == PF_ADDR_TABLE || 2398 DYNIF_MULTIADDR($5.host->addr))) 2399 r.rpool.opts |= PF_POOL_ROUNDROBIN; 2400 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2401 PF_POOL_ROUNDROBIN && 2402 disallow_table($5.host, "tables are only " 2403 "supported in round-robin routing pools")) 2404 YYERROR; 2405 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2406 PF_POOL_ROUNDROBIN && 2407 disallow_alias($5.host, "interface (%s) " 2408 "is only supported in round-robin " 2409 "routing pools")) 2410 YYERROR; 2411 if ($5.host->next != NULL) { 2412 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2413 PF_POOL_ROUNDROBIN) { 2414 yyerror("r.rpool.opts must " 2415 "be PF_POOL_ROUNDROBIN"); 2416 YYERROR; 2417 } 2418 } 2419 } 2420 if ($9.queues.qname != NULL) { 2421 if (strlcpy(r.qname, $9.queues.qname, 2422 sizeof(r.qname)) >= sizeof(r.qname)) { 2423 yyerror("rule qname too long (max " 2424 "%d chars)", sizeof(r.qname)-1); 2425 YYERROR; 2426 } 2427 free($9.queues.qname); 2428 } 2429 if ($9.queues.pqname != NULL) { 2430 if (strlcpy(r.pqname, $9.queues.pqname, 2431 sizeof(r.pqname)) >= sizeof(r.pqname)) { 2432 yyerror("rule pqname too long (max " 2433 "%d chars)", sizeof(r.pqname)-1); 2434 YYERROR; 2435 } 2436 free($9.queues.pqname); 2437 } 2438 #ifdef __FreeBSD__ 2439 r.divert.port = $9.divert.port; 2440 #else 2441 if ((r.divert.port = $9.divert.port)) { 2442 if (r.direction == PF_OUT) { 2443 if ($9.divert.addr) { 2444 yyerror("address specified " 2445 "for outgoing divert"); 2446 YYERROR; 2447 } 2448 bzero(&r.divert.addr, 2449 sizeof(r.divert.addr)); 2450 } else { 2451 if (!$9.divert.addr) { 2452 yyerror("no address specified " 2453 "for incoming divert"); 2454 YYERROR; 2455 } 2456 if ($9.divert.addr->af != r.af) { 2457 yyerror("address family " 2458 "mismatch for divert"); 2459 YYERROR; 2460 } 2461 r.divert.addr = 2462 $9.divert.addr->addr.v.a.addr; 2463 } 2464 } 2465 #endif 2466 2467 expand_rule(&r, $4, $5.host, $7, $8.src_os, 2468 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 2469 $9.uid, $9.gid, $9.icmpspec, ""); 2470 } 2471 ; 2472 2473 filter_opts : { 2474 bzero(&filter_opts, sizeof filter_opts); 2475 filter_opts.rtableid = -1; 2476 } 2477 filter_opts_l 2478 { $$ = filter_opts; } 2479 | /* empty */ { 2480 bzero(&filter_opts, sizeof filter_opts); 2481 filter_opts.rtableid = -1; 2482 $$ = filter_opts; 2483 } 2484 ; 2485 2486 filter_opts_l : filter_opts_l filter_opt 2487 | filter_opt 2488 ; 2489 2490 filter_opt : USER uids { 2491 if (filter_opts.uid) 2492 $2->tail->next = filter_opts.uid; 2493 filter_opts.uid = $2; 2494 } 2495 | GROUP gids { 2496 if (filter_opts.gid) 2497 $2->tail->next = filter_opts.gid; 2498 filter_opts.gid = $2; 2499 } 2500 | flags { 2501 if (filter_opts.marker & FOM_FLAGS) { 2502 yyerror("flags cannot be redefined"); 2503 YYERROR; 2504 } 2505 filter_opts.marker |= FOM_FLAGS; 2506 filter_opts.flags.b1 |= $1.b1; 2507 filter_opts.flags.b2 |= $1.b2; 2508 filter_opts.flags.w |= $1.w; 2509 filter_opts.flags.w2 |= $1.w2; 2510 } 2511 | icmpspec { 2512 if (filter_opts.marker & FOM_ICMP) { 2513 yyerror("icmp-type cannot be redefined"); 2514 YYERROR; 2515 } 2516 filter_opts.marker |= FOM_ICMP; 2517 filter_opts.icmpspec = $1; 2518 } 2519 | PRIO NUMBER { 2520 if (filter_opts.marker & FOM_PRIO) { 2521 yyerror("prio cannot be redefined"); 2522 YYERROR; 2523 } 2524 if ($2 < 0 || $2 > PF_PRIO_MAX) { 2525 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 2526 YYERROR; 2527 } 2528 filter_opts.marker |= FOM_PRIO; 2529 filter_opts.prio = $2; 2530 } 2531 | TOS tos { 2532 if (filter_opts.marker & FOM_TOS) { 2533 yyerror("tos cannot be redefined"); 2534 YYERROR; 2535 } 2536 filter_opts.marker |= FOM_TOS; 2537 filter_opts.tos = $2; 2538 } 2539 | keep { 2540 if (filter_opts.marker & FOM_KEEP) { 2541 yyerror("modulate or keep cannot be redefined"); 2542 YYERROR; 2543 } 2544 filter_opts.marker |= FOM_KEEP; 2545 filter_opts.keep.action = $1.action; 2546 filter_opts.keep.options = $1.options; 2547 } 2548 | FRAGMENT { 2549 filter_opts.fragment = 1; 2550 } 2551 | ALLOWOPTS { 2552 filter_opts.allowopts = 1; 2553 } 2554 | label { 2555 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 2556 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 2557 YYERROR; 2558 } 2559 filter_opts.label[filter_opts.labelcount++] = $1; 2560 } 2561 | qname { 2562 if (filter_opts.queues.qname) { 2563 yyerror("queue cannot be redefined"); 2564 YYERROR; 2565 } 2566 filter_opts.queues = $1; 2567 } 2568 | TAG string { 2569 filter_opts.tag = $2; 2570 } 2571 | not TAGGED string { 2572 filter_opts.match_tag = $3; 2573 filter_opts.match_tag_not = $1; 2574 } 2575 | PROBABILITY probability { 2576 double p; 2577 2578 p = floor($2 * UINT_MAX + 0.5); 2579 if (p < 0.0 || p > UINT_MAX) { 2580 yyerror("invalid probability: %lf", p); 2581 YYERROR; 2582 } 2583 filter_opts.prob = (u_int32_t)p; 2584 if (filter_opts.prob == 0) 2585 filter_opts.prob = 1; 2586 } 2587 | RTABLE NUMBER { 2588 if ($2 < 0 || $2 > rt_tableid_max()) { 2589 yyerror("invalid rtable id"); 2590 YYERROR; 2591 } 2592 filter_opts.rtableid = $2; 2593 } 2594 | DIVERTTO portplain { 2595 #ifdef __FreeBSD__ 2596 filter_opts.divert.port = $2.a; 2597 if (!filter_opts.divert.port) { 2598 yyerror("invalid divert port: %u", ntohs($2.a)); 2599 YYERROR; 2600 } 2601 #endif 2602 } 2603 | DIVERTTO STRING PORT portplain { 2604 #ifndef __FreeBSD__ 2605 if ((filter_opts.divert.addr = host($2)) == NULL) { 2606 yyerror("could not parse divert address: %s", 2607 $2); 2608 free($2); 2609 YYERROR; 2610 } 2611 #else 2612 if ($2) 2613 #endif 2614 free($2); 2615 filter_opts.divert.port = $4.a; 2616 if (!filter_opts.divert.port) { 2617 yyerror("invalid divert port: %u", ntohs($4.a)); 2618 YYERROR; 2619 } 2620 } 2621 | DIVERTREPLY { 2622 #ifdef __FreeBSD__ 2623 yyerror("divert-reply has no meaning in FreeBSD pf(4)"); 2624 YYERROR; 2625 #else 2626 filter_opts.divert.port = 1; /* some random value */ 2627 #endif 2628 } 2629 | filter_sets 2630 ; 2631 2632 filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; } 2633 | SET filter_set { $$ = filter_opts; } 2634 ; 2635 2636 filter_sets_l : filter_sets_l comma filter_set 2637 | filter_set 2638 ; 2639 2640 filter_set : prio { 2641 if (filter_opts.marker & FOM_SETPRIO) { 2642 yyerror("prio cannot be redefined"); 2643 YYERROR; 2644 } 2645 filter_opts.marker |= FOM_SETPRIO; 2646 filter_opts.set_prio[0] = $1.b1; 2647 filter_opts.set_prio[1] = $1.b2; 2648 } 2649 prio : PRIO NUMBER { 2650 if ($2 < 0 || $2 > PF_PRIO_MAX) { 2651 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 2652 YYERROR; 2653 } 2654 $$.b1 = $$.b2 = $2; 2655 } 2656 | PRIO '(' NUMBER comma NUMBER ')' { 2657 if ($3 < 0 || $3 > PF_PRIO_MAX || 2658 $5 < 0 || $5 > PF_PRIO_MAX) { 2659 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 2660 YYERROR; 2661 } 2662 $$.b1 = $3; 2663 $$.b2 = $5; 2664 } 2665 ; 2666 2667 probability : STRING { 2668 char *e; 2669 double p = strtod($1, &e); 2670 2671 if (*e == '%') { 2672 p *= 0.01; 2673 e++; 2674 } 2675 if (*e) { 2676 yyerror("invalid probability: %s", $1); 2677 free($1); 2678 YYERROR; 2679 } 2680 free($1); 2681 $$ = p; 2682 } 2683 | NUMBER { 2684 $$ = (double)$1; 2685 } 2686 ; 2687 2688 2689 action : PASS { 2690 $$.b1 = PF_PASS; 2691 $$.b2 = failpolicy; 2692 $$.w = returnicmpdefault; 2693 $$.w2 = returnicmp6default; 2694 } 2695 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 2696 ; 2697 2698 blockspec : /* empty */ { 2699 $$.b2 = blockpolicy; 2700 $$.w = returnicmpdefault; 2701 $$.w2 = returnicmp6default; 2702 } 2703 | DROP { 2704 $$.b2 = PFRULE_DROP; 2705 $$.w = 0; 2706 $$.w2 = 0; 2707 } 2708 | RETURNRST { 2709 $$.b2 = PFRULE_RETURNRST; 2710 $$.w = 0; 2711 $$.w2 = 0; 2712 } 2713 | RETURNRST '(' TTL NUMBER ')' { 2714 if ($4 < 0 || $4 > 255) { 2715 yyerror("illegal ttl value %d", $4); 2716 YYERROR; 2717 } 2718 $$.b2 = PFRULE_RETURNRST; 2719 $$.w = $4; 2720 $$.w2 = 0; 2721 } 2722 | RETURNICMP { 2723 $$.b2 = PFRULE_RETURNICMP; 2724 $$.w = returnicmpdefault; 2725 $$.w2 = returnicmp6default; 2726 } 2727 | RETURNICMP6 { 2728 $$.b2 = PFRULE_RETURNICMP; 2729 $$.w = returnicmpdefault; 2730 $$.w2 = returnicmp6default; 2731 } 2732 | RETURNICMP '(' reticmpspec ')' { 2733 $$.b2 = PFRULE_RETURNICMP; 2734 $$.w = $3; 2735 $$.w2 = returnicmpdefault; 2736 } 2737 | RETURNICMP6 '(' reticmp6spec ')' { 2738 $$.b2 = PFRULE_RETURNICMP; 2739 $$.w = returnicmpdefault; 2740 $$.w2 = $3; 2741 } 2742 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' { 2743 $$.b2 = PFRULE_RETURNICMP; 2744 $$.w = $3; 2745 $$.w2 = $5; 2746 } 2747 | RETURN { 2748 $$.b2 = PFRULE_RETURN; 2749 $$.w = returnicmpdefault; 2750 $$.w2 = returnicmp6default; 2751 } 2752 ; 2753 2754 reticmpspec : STRING { 2755 if (!($$ = parseicmpspec($1, AF_INET))) { 2756 free($1); 2757 YYERROR; 2758 } 2759 free($1); 2760 } 2761 | NUMBER { 2762 u_int8_t icmptype; 2763 2764 if ($1 < 0 || $1 > 255) { 2765 yyerror("invalid icmp code %lu", $1); 2766 YYERROR; 2767 } 2768 icmptype = returnicmpdefault >> 8; 2769 $$ = (icmptype << 8 | $1); 2770 } 2771 ; 2772 2773 reticmp6spec : STRING { 2774 if (!($$ = parseicmpspec($1, AF_INET6))) { 2775 free($1); 2776 YYERROR; 2777 } 2778 free($1); 2779 } 2780 | NUMBER { 2781 u_int8_t icmptype; 2782 2783 if ($1 < 0 || $1 > 255) { 2784 yyerror("invalid icmp code %lu", $1); 2785 YYERROR; 2786 } 2787 icmptype = returnicmp6default >> 8; 2788 $$ = (icmptype << 8 | $1); 2789 } 2790 ; 2791 2792 dir : /* empty */ { $$ = PF_INOUT; } 2793 | IN { $$ = PF_IN; } 2794 | OUT { $$ = PF_OUT; } 2795 ; 2796 2797 quick : /* empty */ { $$.quick = 0; } 2798 | QUICK { $$.quick = 1; } 2799 ; 2800 2801 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; } 2802 | log { $$ = $1; $$.quick = 0; } 2803 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; } 2804 | log QUICK { $$ = $1; $$.quick = 1; } 2805 | QUICK log { $$ = $2; $$.quick = 1; } 2806 ; 2807 2808 log : LOG { $$.log = PF_LOG; $$.logif = 0; } 2809 | LOG '(' logopts ')' { 2810 $$.log = PF_LOG | $3.log; 2811 $$.logif = $3.logif; 2812 } 2813 ; 2814 2815 logopts : logopt { $$ = $1; } 2816 | logopts comma logopt { 2817 $$.log = $1.log | $3.log; 2818 $$.logif = $3.logif; 2819 if ($$.logif == 0) 2820 $$.logif = $1.logif; 2821 } 2822 ; 2823 2824 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; } 2825 | USER { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 2826 | GROUP { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 2827 | TO string { 2828 const char *errstr; 2829 u_int i; 2830 2831 $$.log = 0; 2832 if (strncmp($2, "pflog", 5)) { 2833 yyerror("%s: should be a pflog interface", $2); 2834 free($2); 2835 YYERROR; 2836 } 2837 i = strtonum($2 + 5, 0, 255, &errstr); 2838 if (errstr) { 2839 yyerror("%s: %s", $2, errstr); 2840 free($2); 2841 YYERROR; 2842 } 2843 free($2); 2844 $$.logif = i; 2845 } 2846 ; 2847 2848 interface : /* empty */ { $$ = NULL; } 2849 | ON if_item_not { $$ = $2; } 2850 | ON '{' optnl if_list '}' { $$ = $4; } 2851 ; 2852 2853 if_list : if_item_not optnl { $$ = $1; } 2854 | if_list comma if_item_not optnl { 2855 $1->tail->next = $3; 2856 $1->tail = $3; 2857 $$ = $1; 2858 } 2859 ; 2860 2861 if_item_not : not if_item { $$ = $2; $$->not = $1; } 2862 ; 2863 2864 if_item : STRING { 2865 struct node_host *n; 2866 2867 $$ = calloc(1, sizeof(struct node_if)); 2868 if ($$ == NULL) 2869 err(1, "if_item: calloc"); 2870 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 2871 sizeof($$->ifname)) { 2872 free($1); 2873 free($$); 2874 yyerror("interface name too long"); 2875 YYERROR; 2876 } 2877 2878 if ((n = ifa_exists($1)) != NULL) 2879 $$->ifa_flags = n->ifa_flags; 2880 2881 free($1); 2882 $$->not = 0; 2883 $$->next = NULL; 2884 $$->tail = $$; 2885 } 2886 ; 2887 2888 af : /* empty */ { $$ = 0; } 2889 | INET { $$ = AF_INET; } 2890 | INET6 { $$ = AF_INET6; } 2891 ; 2892 2893 proto : /* empty */ { $$ = NULL; } 2894 | PROTO proto_item { $$ = $2; } 2895 | PROTO '{' optnl proto_list '}' { $$ = $4; } 2896 ; 2897 2898 proto_list : proto_item optnl { $$ = $1; } 2899 | proto_list comma proto_item optnl { 2900 $1->tail->next = $3; 2901 $1->tail = $3; 2902 $$ = $1; 2903 } 2904 ; 2905 2906 proto_item : protoval { 2907 u_int8_t pr; 2908 2909 pr = (u_int8_t)$1; 2910 if (pr == 0) { 2911 yyerror("proto 0 cannot be used"); 2912 YYERROR; 2913 } 2914 $$ = calloc(1, sizeof(struct node_proto)); 2915 if ($$ == NULL) 2916 err(1, "proto_item: calloc"); 2917 $$->proto = pr; 2918 $$->next = NULL; 2919 $$->tail = $$; 2920 } 2921 ; 2922 2923 protoval : STRING { 2924 struct protoent *p; 2925 2926 p = getprotobyname($1); 2927 if (p == NULL) { 2928 yyerror("unknown protocol %s", $1); 2929 free($1); 2930 YYERROR; 2931 } 2932 $$ = p->p_proto; 2933 free($1); 2934 } 2935 | NUMBER { 2936 if ($1 < 0 || $1 > 255) { 2937 yyerror("protocol outside range"); 2938 YYERROR; 2939 } 2940 } 2941 ; 2942 2943 fromto : ALL { 2944 $$.src.host = NULL; 2945 $$.src.port = NULL; 2946 $$.dst.host = NULL; 2947 $$.dst.port = NULL; 2948 $$.src_os = NULL; 2949 } 2950 | from os to { 2951 $$.src = $1; 2952 $$.src_os = $2; 2953 $$.dst = $3; 2954 } 2955 ; 2956 2957 os : /* empty */ { $$ = NULL; } 2958 | OS xos { $$ = $2; } 2959 | OS '{' optnl os_list '}' { $$ = $4; } 2960 ; 2961 2962 xos : STRING { 2963 $$ = calloc(1, sizeof(struct node_os)); 2964 if ($$ == NULL) 2965 err(1, "os: calloc"); 2966 $$->os = $1; 2967 $$->tail = $$; 2968 } 2969 ; 2970 2971 os_list : xos optnl { $$ = $1; } 2972 | os_list comma xos optnl { 2973 $1->tail->next = $3; 2974 $1->tail = $3; 2975 $$ = $1; 2976 } 2977 ; 2978 2979 from : /* empty */ { 2980 $$.host = NULL; 2981 $$.port = NULL; 2982 } 2983 | FROM ipportspec { 2984 $$ = $2; 2985 } 2986 ; 2987 2988 to : /* empty */ { 2989 $$.host = NULL; 2990 $$.port = NULL; 2991 } 2992 | TO ipportspec { 2993 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is " 2994 "not permitted in a destination address")) 2995 YYERROR; 2996 $$ = $2; 2997 } 2998 ; 2999 3000 ipportspec : ipspec { 3001 $$.host = $1; 3002 $$.port = NULL; 3003 } 3004 | ipspec PORT portspec { 3005 $$.host = $1; 3006 $$.port = $3; 3007 } 3008 | PORT portspec { 3009 $$.host = NULL; 3010 $$.port = $2; 3011 } 3012 ; 3013 3014 optnl : '\n' optnl 3015 | 3016 ; 3017 3018 ipspec : ANY { $$ = NULL; } 3019 | xhost { $$ = $1; } 3020 | '{' optnl host_list '}' { $$ = $3; } 3021 ; 3022 3023 toipspec : TO ipspec { $$ = $2; } 3024 | /* empty */ { $$ = NULL; } 3025 ; 3026 3027 host_list : ipspec optnl { $$ = $1; } 3028 | host_list comma ipspec optnl { 3029 if ($3 == NULL) 3030 $$ = $1; 3031 else if ($1 == NULL) 3032 $$ = $3; 3033 else { 3034 $1->tail->next = $3; 3035 $1->tail = $3->tail; 3036 $$ = $1; 3037 } 3038 } 3039 ; 3040 3041 xhost : not host { 3042 struct node_host *n; 3043 3044 for (n = $2; n != NULL; n = n->next) 3045 n->not = $1; 3046 $$ = $2; 3047 } 3048 | not NOROUTE { 3049 $$ = calloc(1, sizeof(struct node_host)); 3050 if ($$ == NULL) 3051 err(1, "xhost: calloc"); 3052 $$->addr.type = PF_ADDR_NOROUTE; 3053 $$->next = NULL; 3054 $$->not = $1; 3055 $$->tail = $$; 3056 } 3057 | not URPFFAILED { 3058 $$ = calloc(1, sizeof(struct node_host)); 3059 if ($$ == NULL) 3060 err(1, "xhost: calloc"); 3061 $$->addr.type = PF_ADDR_URPFFAILED; 3062 $$->next = NULL; 3063 $$->not = $1; 3064 $$->tail = $$; 3065 } 3066 ; 3067 3068 host : STRING { 3069 if (($$ = host($1)) == NULL) { 3070 /* error. "any" is handled elsewhere */ 3071 free($1); 3072 yyerror("could not parse host specification"); 3073 YYERROR; 3074 } 3075 free($1); 3076 3077 } 3078 | STRING '-' STRING { 3079 struct node_host *b, *e; 3080 3081 if ((b = host($1)) == NULL || (e = host($3)) == NULL) { 3082 free($1); 3083 free($3); 3084 yyerror("could not parse host specification"); 3085 YYERROR; 3086 } 3087 if (b->af != e->af || 3088 b->addr.type != PF_ADDR_ADDRMASK || 3089 e->addr.type != PF_ADDR_ADDRMASK || 3090 unmask(&b->addr.v.a.mask, b->af) != 3091 (b->af == AF_INET ? 32 : 128) || 3092 unmask(&e->addr.v.a.mask, e->af) != 3093 (e->af == AF_INET ? 32 : 128) || 3094 b->next != NULL || b->not || 3095 e->next != NULL || e->not) { 3096 free(b); 3097 free(e); 3098 free($1); 3099 free($3); 3100 yyerror("invalid address range"); 3101 YYERROR; 3102 } 3103 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr, 3104 sizeof(b->addr.v.a.mask)); 3105 b->addr.type = PF_ADDR_RANGE; 3106 $$ = b; 3107 free(e); 3108 free($1); 3109 free($3); 3110 } 3111 | STRING '/' NUMBER { 3112 char *buf; 3113 3114 if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1) 3115 err(1, "host: asprintf"); 3116 free($1); 3117 if (($$ = host(buf)) == NULL) { 3118 /* error. "any" is handled elsewhere */ 3119 free(buf); 3120 yyerror("could not parse host specification"); 3121 YYERROR; 3122 } 3123 free(buf); 3124 } 3125 | NUMBER '/' NUMBER { 3126 char *buf; 3127 3128 /* ie. for 10/8 parsing */ 3129 #ifdef __FreeBSD__ 3130 if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1) 3131 #else 3132 if (asprintf(&buf, "%lld/%lld", $1, $3) == -1) 3133 #endif 3134 err(1, "host: asprintf"); 3135 if (($$ = host(buf)) == NULL) { 3136 /* error. "any" is handled elsewhere */ 3137 free(buf); 3138 yyerror("could not parse host specification"); 3139 YYERROR; 3140 } 3141 free(buf); 3142 } 3143 | dynaddr 3144 | dynaddr '/' NUMBER { 3145 struct node_host *n; 3146 3147 if ($3 < 0 || $3 > 128) { 3148 yyerror("bit number too big"); 3149 YYERROR; 3150 } 3151 $$ = $1; 3152 for (n = $1; n != NULL; n = n->next) 3153 set_ipmask(n, $3); 3154 } 3155 | '<' STRING '>' { 3156 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 3157 yyerror("table name '%s' too long", $2); 3158 free($2); 3159 YYERROR; 3160 } 3161 $$ = calloc(1, sizeof(struct node_host)); 3162 if ($$ == NULL) 3163 err(1, "host: calloc"); 3164 $$->addr.type = PF_ADDR_TABLE; 3165 if (strlcpy($$->addr.v.tblname, $2, 3166 sizeof($$->addr.v.tblname)) >= 3167 sizeof($$->addr.v.tblname)) 3168 errx(1, "host: strlcpy"); 3169 free($2); 3170 $$->next = NULL; 3171 $$->tail = $$; 3172 } 3173 ; 3174 3175 number : NUMBER 3176 | STRING { 3177 u_long ulval; 3178 3179 if (atoul($1, &ulval) == -1) { 3180 yyerror("%s is not a number", $1); 3181 free($1); 3182 YYERROR; 3183 } else 3184 $$ = ulval; 3185 free($1); 3186 } 3187 ; 3188 3189 dynaddr : '(' STRING ')' { 3190 int flags = 0; 3191 char *p, *op; 3192 3193 op = $2; 3194 if (!isalpha(op[0])) { 3195 yyerror("invalid interface name '%s'", op); 3196 free(op); 3197 YYERROR; 3198 } 3199 while ((p = strrchr($2, ':')) != NULL) { 3200 if (!strcmp(p+1, "network")) 3201 flags |= PFI_AFLAG_NETWORK; 3202 else if (!strcmp(p+1, "broadcast")) 3203 flags |= PFI_AFLAG_BROADCAST; 3204 else if (!strcmp(p+1, "peer")) 3205 flags |= PFI_AFLAG_PEER; 3206 else if (!strcmp(p+1, "0")) 3207 flags |= PFI_AFLAG_NOALIAS; 3208 else { 3209 yyerror("interface %s has bad modifier", 3210 $2); 3211 free(op); 3212 YYERROR; 3213 } 3214 *p = '\0'; 3215 } 3216 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { 3217 free(op); 3218 yyerror("illegal combination of " 3219 "interface modifiers"); 3220 YYERROR; 3221 } 3222 $$ = calloc(1, sizeof(struct node_host)); 3223 if ($$ == NULL) 3224 err(1, "address: calloc"); 3225 $$->af = 0; 3226 set_ipmask($$, 128); 3227 $$->addr.type = PF_ADDR_DYNIFTL; 3228 $$->addr.iflags = flags; 3229 if (strlcpy($$->addr.v.ifname, $2, 3230 sizeof($$->addr.v.ifname)) >= 3231 sizeof($$->addr.v.ifname)) { 3232 free(op); 3233 free($$); 3234 yyerror("interface name too long"); 3235 YYERROR; 3236 } 3237 free(op); 3238 $$->next = NULL; 3239 $$->tail = $$; 3240 } 3241 ; 3242 3243 portspec : port_item { $$ = $1; } 3244 | '{' optnl port_list '}' { $$ = $3; } 3245 ; 3246 3247 port_list : port_item optnl { $$ = $1; } 3248 | port_list comma port_item optnl { 3249 $1->tail->next = $3; 3250 $1->tail = $3; 3251 $$ = $1; 3252 } 3253 ; 3254 3255 port_item : portrange { 3256 $$ = calloc(1, sizeof(struct node_port)); 3257 if ($$ == NULL) 3258 err(1, "port_item: calloc"); 3259 $$->port[0] = $1.a; 3260 $$->port[1] = $1.b; 3261 if ($1.t) 3262 $$->op = PF_OP_RRG; 3263 else 3264 $$->op = PF_OP_EQ; 3265 $$->next = NULL; 3266 $$->tail = $$; 3267 } 3268 | unaryop portrange { 3269 if ($2.t) { 3270 yyerror("':' cannot be used with an other " 3271 "port operator"); 3272 YYERROR; 3273 } 3274 $$ = calloc(1, sizeof(struct node_port)); 3275 if ($$ == NULL) 3276 err(1, "port_item: calloc"); 3277 $$->port[0] = $2.a; 3278 $$->port[1] = $2.b; 3279 $$->op = $1; 3280 $$->next = NULL; 3281 $$->tail = $$; 3282 } 3283 | portrange PORTBINARY portrange { 3284 if ($1.t || $3.t) { 3285 yyerror("':' cannot be used with an other " 3286 "port operator"); 3287 YYERROR; 3288 } 3289 $$ = calloc(1, sizeof(struct node_port)); 3290 if ($$ == NULL) 3291 err(1, "port_item: calloc"); 3292 $$->port[0] = $1.a; 3293 $$->port[1] = $3.a; 3294 $$->op = $2; 3295 $$->next = NULL; 3296 $$->tail = $$; 3297 } 3298 ; 3299 3300 portplain : numberstring { 3301 if (parseport($1, &$$, 0) == -1) { 3302 free($1); 3303 YYERROR; 3304 } 3305 free($1); 3306 } 3307 ; 3308 3309 portrange : numberstring { 3310 if (parseport($1, &$$, PPORT_RANGE) == -1) { 3311 free($1); 3312 YYERROR; 3313 } 3314 free($1); 3315 } 3316 ; 3317 3318 uids : uid_item { $$ = $1; } 3319 | '{' optnl uid_list '}' { $$ = $3; } 3320 ; 3321 3322 uid_list : uid_item optnl { $$ = $1; } 3323 | uid_list comma uid_item optnl { 3324 $1->tail->next = $3; 3325 $1->tail = $3; 3326 $$ = $1; 3327 } 3328 ; 3329 3330 uid_item : uid { 3331 $$ = calloc(1, sizeof(struct node_uid)); 3332 if ($$ == NULL) 3333 err(1, "uid_item: calloc"); 3334 $$->uid[0] = $1; 3335 $$->uid[1] = $1; 3336 $$->op = PF_OP_EQ; 3337 $$->next = NULL; 3338 $$->tail = $$; 3339 } 3340 | unaryop uid { 3341 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3342 yyerror("user unknown requires operator = or " 3343 "!="); 3344 YYERROR; 3345 } 3346 $$ = calloc(1, sizeof(struct node_uid)); 3347 if ($$ == NULL) 3348 err(1, "uid_item: calloc"); 3349 $$->uid[0] = $2; 3350 $$->uid[1] = $2; 3351 $$->op = $1; 3352 $$->next = NULL; 3353 $$->tail = $$; 3354 } 3355 | uid PORTBINARY uid { 3356 if ($1 == UID_MAX || $3 == UID_MAX) { 3357 yyerror("user unknown requires operator = or " 3358 "!="); 3359 YYERROR; 3360 } 3361 $$ = calloc(1, sizeof(struct node_uid)); 3362 if ($$ == NULL) 3363 err(1, "uid_item: calloc"); 3364 $$->uid[0] = $1; 3365 $$->uid[1] = $3; 3366 $$->op = $2; 3367 $$->next = NULL; 3368 $$->tail = $$; 3369 } 3370 ; 3371 3372 uid : STRING { 3373 if (!strcmp($1, "unknown")) 3374 $$ = UID_MAX; 3375 else { 3376 struct passwd *pw; 3377 3378 if ((pw = getpwnam($1)) == NULL) { 3379 yyerror("unknown user %s", $1); 3380 free($1); 3381 YYERROR; 3382 } 3383 $$ = pw->pw_uid; 3384 } 3385 free($1); 3386 } 3387 | NUMBER { 3388 if ($1 < 0 || $1 >= UID_MAX) { 3389 yyerror("illegal uid value %lu", $1); 3390 YYERROR; 3391 } 3392 $$ = $1; 3393 } 3394 ; 3395 3396 gids : gid_item { $$ = $1; } 3397 | '{' optnl gid_list '}' { $$ = $3; } 3398 ; 3399 3400 gid_list : gid_item optnl { $$ = $1; } 3401 | gid_list comma gid_item optnl { 3402 $1->tail->next = $3; 3403 $1->tail = $3; 3404 $$ = $1; 3405 } 3406 ; 3407 3408 gid_item : gid { 3409 $$ = calloc(1, sizeof(struct node_gid)); 3410 if ($$ == NULL) 3411 err(1, "gid_item: calloc"); 3412 $$->gid[0] = $1; 3413 $$->gid[1] = $1; 3414 $$->op = PF_OP_EQ; 3415 $$->next = NULL; 3416 $$->tail = $$; 3417 } 3418 | unaryop gid { 3419 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3420 yyerror("group unknown requires operator = or " 3421 "!="); 3422 YYERROR; 3423 } 3424 $$ = calloc(1, sizeof(struct node_gid)); 3425 if ($$ == NULL) 3426 err(1, "gid_item: calloc"); 3427 $$->gid[0] = $2; 3428 $$->gid[1] = $2; 3429 $$->op = $1; 3430 $$->next = NULL; 3431 $$->tail = $$; 3432 } 3433 | gid PORTBINARY gid { 3434 if ($1 == GID_MAX || $3 == GID_MAX) { 3435 yyerror("group unknown requires operator = or " 3436 "!="); 3437 YYERROR; 3438 } 3439 $$ = calloc(1, sizeof(struct node_gid)); 3440 if ($$ == NULL) 3441 err(1, "gid_item: calloc"); 3442 $$->gid[0] = $1; 3443 $$->gid[1] = $3; 3444 $$->op = $2; 3445 $$->next = NULL; 3446 $$->tail = $$; 3447 } 3448 ; 3449 3450 gid : STRING { 3451 if (!strcmp($1, "unknown")) 3452 $$ = GID_MAX; 3453 else { 3454 struct group *grp; 3455 3456 if ((grp = getgrnam($1)) == NULL) { 3457 yyerror("unknown group %s", $1); 3458 free($1); 3459 YYERROR; 3460 } 3461 $$ = grp->gr_gid; 3462 } 3463 free($1); 3464 } 3465 | NUMBER { 3466 if ($1 < 0 || $1 >= GID_MAX) { 3467 yyerror("illegal gid value %lu", $1); 3468 YYERROR; 3469 } 3470 $$ = $1; 3471 } 3472 ; 3473 3474 flag : STRING { 3475 int f; 3476 3477 if ((f = parse_flags($1)) < 0) { 3478 yyerror("bad flags %s", $1); 3479 free($1); 3480 YYERROR; 3481 } 3482 free($1); 3483 $$.b1 = f; 3484 } 3485 ; 3486 3487 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 3488 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 3489 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; } 3490 ; 3491 3492 icmpspec : ICMPTYPE icmp_item { $$ = $2; } 3493 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; } 3494 | ICMP6TYPE icmp6_item { $$ = $2; } 3495 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; } 3496 ; 3497 3498 icmp_list : icmp_item optnl { $$ = $1; } 3499 | icmp_list comma icmp_item optnl { 3500 $1->tail->next = $3; 3501 $1->tail = $3; 3502 $$ = $1; 3503 } 3504 ; 3505 3506 icmp6_list : icmp6_item optnl { $$ = $1; } 3507 | icmp6_list comma icmp6_item optnl { 3508 $1->tail->next = $3; 3509 $1->tail = $3; 3510 $$ = $1; 3511 } 3512 ; 3513 3514 icmp_item : icmptype { 3515 $$ = calloc(1, sizeof(struct node_icmp)); 3516 if ($$ == NULL) 3517 err(1, "icmp_item: calloc"); 3518 $$->type = $1; 3519 $$->code = 0; 3520 $$->proto = IPPROTO_ICMP; 3521 $$->next = NULL; 3522 $$->tail = $$; 3523 } 3524 | icmptype CODE STRING { 3525 const struct icmpcodeent *p; 3526 3527 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) { 3528 yyerror("unknown icmp-code %s", $3); 3529 free($3); 3530 YYERROR; 3531 } 3532 3533 free($3); 3534 $$ = calloc(1, sizeof(struct node_icmp)); 3535 if ($$ == NULL) 3536 err(1, "icmp_item: calloc"); 3537 $$->type = $1; 3538 $$->code = p->code + 1; 3539 $$->proto = IPPROTO_ICMP; 3540 $$->next = NULL; 3541 $$->tail = $$; 3542 } 3543 | icmptype CODE NUMBER { 3544 if ($3 < 0 || $3 > 255) { 3545 yyerror("illegal icmp-code %lu", $3); 3546 YYERROR; 3547 } 3548 $$ = calloc(1, sizeof(struct node_icmp)); 3549 if ($$ == NULL) 3550 err(1, "icmp_item: calloc"); 3551 $$->type = $1; 3552 $$->code = $3 + 1; 3553 $$->proto = IPPROTO_ICMP; 3554 $$->next = NULL; 3555 $$->tail = $$; 3556 } 3557 ; 3558 3559 icmp6_item : icmp6type { 3560 $$ = calloc(1, sizeof(struct node_icmp)); 3561 if ($$ == NULL) 3562 err(1, "icmp_item: calloc"); 3563 $$->type = $1; 3564 $$->code = 0; 3565 $$->proto = IPPROTO_ICMPV6; 3566 $$->next = NULL; 3567 $$->tail = $$; 3568 } 3569 | icmp6type CODE STRING { 3570 const struct icmpcodeent *p; 3571 3572 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) { 3573 yyerror("unknown icmp6-code %s", $3); 3574 free($3); 3575 YYERROR; 3576 } 3577 free($3); 3578 3579 $$ = calloc(1, sizeof(struct node_icmp)); 3580 if ($$ == NULL) 3581 err(1, "icmp_item: calloc"); 3582 $$->type = $1; 3583 $$->code = p->code + 1; 3584 $$->proto = IPPROTO_ICMPV6; 3585 $$->next = NULL; 3586 $$->tail = $$; 3587 } 3588 | icmp6type CODE NUMBER { 3589 if ($3 < 0 || $3 > 255) { 3590 yyerror("illegal icmp-code %lu", $3); 3591 YYERROR; 3592 } 3593 $$ = calloc(1, sizeof(struct node_icmp)); 3594 if ($$ == NULL) 3595 err(1, "icmp_item: calloc"); 3596 $$->type = $1; 3597 $$->code = $3 + 1; 3598 $$->proto = IPPROTO_ICMPV6; 3599 $$->next = NULL; 3600 $$->tail = $$; 3601 } 3602 ; 3603 3604 icmptype : STRING { 3605 const struct icmptypeent *p; 3606 3607 if ((p = geticmptypebyname($1, AF_INET)) == NULL) { 3608 yyerror("unknown icmp-type %s", $1); 3609 free($1); 3610 YYERROR; 3611 } 3612 $$ = p->type + 1; 3613 free($1); 3614 } 3615 | NUMBER { 3616 if ($1 < 0 || $1 > 255) { 3617 yyerror("illegal icmp-type %lu", $1); 3618 YYERROR; 3619 } 3620 $$ = $1 + 1; 3621 } 3622 ; 3623 3624 icmp6type : STRING { 3625 const struct icmptypeent *p; 3626 3627 if ((p = geticmptypebyname($1, AF_INET6)) == 3628 NULL) { 3629 yyerror("unknown icmp6-type %s", $1); 3630 free($1); 3631 YYERROR; 3632 } 3633 $$ = p->type + 1; 3634 free($1); 3635 } 3636 | NUMBER { 3637 if ($1 < 0 || $1 > 255) { 3638 yyerror("illegal icmp6-type %lu", $1); 3639 YYERROR; 3640 } 3641 $$ = $1 + 1; 3642 } 3643 ; 3644 3645 tos : STRING { 3646 int val; 3647 char *end; 3648 3649 if (map_tos($1, &val)) 3650 $$ = val; 3651 else if ($1[0] == '0' && $1[1] == 'x') { 3652 errno = 0; 3653 $$ = strtoul($1, &end, 16); 3654 if (errno || *end != '\0') 3655 $$ = 256; 3656 } else 3657 $$ = 256; /* flag bad argument */ 3658 if ($$ < 0 || $$ > 255) { 3659 yyerror("illegal tos value %s", $1); 3660 free($1); 3661 YYERROR; 3662 } 3663 free($1); 3664 } 3665 | NUMBER { 3666 $$ = $1; 3667 if ($$ < 0 || $$ > 255) { 3668 yyerror("illegal tos value %s", $1); 3669 YYERROR; 3670 } 3671 } 3672 ; 3673 3674 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; } 3675 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; } 3676 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; } 3677 ; 3678 3679 statelock : IFBOUND { 3680 $$ = PFRULE_IFBOUND; 3681 } 3682 | FLOATING { 3683 $$ = 0; 3684 } 3685 ; 3686 3687 keep : NO STATE { 3688 $$.action = 0; 3689 $$.options = NULL; 3690 } 3691 | KEEP STATE state_opt_spec { 3692 $$.action = PF_STATE_NORMAL; 3693 $$.options = $3; 3694 } 3695 | MODULATE STATE state_opt_spec { 3696 $$.action = PF_STATE_MODULATE; 3697 $$.options = $3; 3698 } 3699 | SYNPROXY STATE state_opt_spec { 3700 $$.action = PF_STATE_SYNPROXY; 3701 $$.options = $3; 3702 } 3703 ; 3704 3705 flush : /* empty */ { $$ = 0; } 3706 | FLUSH { $$ = PF_FLUSH; } 3707 | FLUSH GLOBAL { 3708 $$ = PF_FLUSH | PF_FLUSH_GLOBAL; 3709 } 3710 ; 3711 3712 state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 3713 | /* empty */ { $$ = NULL; } 3714 ; 3715 3716 state_opt_list : state_opt_item { $$ = $1; } 3717 | state_opt_list comma state_opt_item { 3718 $1->tail->next = $3; 3719 $1->tail = $3; 3720 $$ = $1; 3721 } 3722 ; 3723 3724 state_opt_item : MAXIMUM NUMBER { 3725 if ($2 < 0 || $2 > UINT_MAX) { 3726 yyerror("only positive values permitted"); 3727 YYERROR; 3728 } 3729 $$ = calloc(1, sizeof(struct node_state_opt)); 3730 if ($$ == NULL) 3731 err(1, "state_opt_item: calloc"); 3732 $$->type = PF_STATE_OPT_MAX; 3733 $$->data.max_states = $2; 3734 $$->next = NULL; 3735 $$->tail = $$; 3736 } 3737 | NOSYNC { 3738 $$ = calloc(1, sizeof(struct node_state_opt)); 3739 if ($$ == NULL) 3740 err(1, "state_opt_item: calloc"); 3741 $$->type = PF_STATE_OPT_NOSYNC; 3742 $$->next = NULL; 3743 $$->tail = $$; 3744 } 3745 | MAXSRCSTATES NUMBER { 3746 if ($2 < 0 || $2 > UINT_MAX) { 3747 yyerror("only positive values permitted"); 3748 YYERROR; 3749 } 3750 $$ = calloc(1, sizeof(struct node_state_opt)); 3751 if ($$ == NULL) 3752 err(1, "state_opt_item: calloc"); 3753 $$->type = PF_STATE_OPT_MAX_SRC_STATES; 3754 $$->data.max_src_states = $2; 3755 $$->next = NULL; 3756 $$->tail = $$; 3757 } 3758 | MAXSRCCONN NUMBER { 3759 if ($2 < 0 || $2 > UINT_MAX) { 3760 yyerror("only positive values permitted"); 3761 YYERROR; 3762 } 3763 $$ = calloc(1, sizeof(struct node_state_opt)); 3764 if ($$ == NULL) 3765 err(1, "state_opt_item: calloc"); 3766 $$->type = PF_STATE_OPT_MAX_SRC_CONN; 3767 $$->data.max_src_conn = $2; 3768 $$->next = NULL; 3769 $$->tail = $$; 3770 } 3771 | MAXSRCCONNRATE NUMBER '/' NUMBER { 3772 if ($2 < 0 || $2 > UINT_MAX || 3773 $4 < 0 || $4 > UINT_MAX) { 3774 yyerror("only positive values permitted"); 3775 YYERROR; 3776 } 3777 $$ = calloc(1, sizeof(struct node_state_opt)); 3778 if ($$ == NULL) 3779 err(1, "state_opt_item: calloc"); 3780 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE; 3781 $$->data.max_src_conn_rate.limit = $2; 3782 $$->data.max_src_conn_rate.seconds = $4; 3783 $$->next = NULL; 3784 $$->tail = $$; 3785 } 3786 | OVERLOAD '<' STRING '>' flush { 3787 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 3788 yyerror("table name '%s' too long", $3); 3789 free($3); 3790 YYERROR; 3791 } 3792 $$ = calloc(1, sizeof(struct node_state_opt)); 3793 if ($$ == NULL) 3794 err(1, "state_opt_item: calloc"); 3795 if (strlcpy($$->data.overload.tblname, $3, 3796 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE) 3797 errx(1, "state_opt_item: strlcpy"); 3798 free($3); 3799 $$->type = PF_STATE_OPT_OVERLOAD; 3800 $$->data.overload.flush = $5; 3801 $$->next = NULL; 3802 $$->tail = $$; 3803 } 3804 | MAXSRCNODES NUMBER { 3805 if ($2 < 0 || $2 > UINT_MAX) { 3806 yyerror("only positive values permitted"); 3807 YYERROR; 3808 } 3809 $$ = calloc(1, sizeof(struct node_state_opt)); 3810 if ($$ == NULL) 3811 err(1, "state_opt_item: calloc"); 3812 $$->type = PF_STATE_OPT_MAX_SRC_NODES; 3813 $$->data.max_src_nodes = $2; 3814 $$->next = NULL; 3815 $$->tail = $$; 3816 } 3817 | sourcetrack { 3818 $$ = calloc(1, sizeof(struct node_state_opt)); 3819 if ($$ == NULL) 3820 err(1, "state_opt_item: calloc"); 3821 $$->type = PF_STATE_OPT_SRCTRACK; 3822 $$->data.src_track = $1; 3823 $$->next = NULL; 3824 $$->tail = $$; 3825 } 3826 | statelock { 3827 $$ = calloc(1, sizeof(struct node_state_opt)); 3828 if ($$ == NULL) 3829 err(1, "state_opt_item: calloc"); 3830 $$->type = PF_STATE_OPT_STATELOCK; 3831 $$->data.statelock = $1; 3832 $$->next = NULL; 3833 $$->tail = $$; 3834 } 3835 | SLOPPY { 3836 $$ = calloc(1, sizeof(struct node_state_opt)); 3837 if ($$ == NULL) 3838 err(1, "state_opt_item: calloc"); 3839 $$->type = PF_STATE_OPT_SLOPPY; 3840 $$->next = NULL; 3841 $$->tail = $$; 3842 } 3843 | STRING NUMBER { 3844 int i; 3845 3846 if ($2 < 0 || $2 > UINT_MAX) { 3847 yyerror("only positive values permitted"); 3848 YYERROR; 3849 } 3850 for (i = 0; pf_timeouts[i].name && 3851 strcmp(pf_timeouts[i].name, $1); ++i) 3852 ; /* nothing */ 3853 if (!pf_timeouts[i].name) { 3854 yyerror("illegal timeout name %s", $1); 3855 free($1); 3856 YYERROR; 3857 } 3858 if (strchr(pf_timeouts[i].name, '.') == NULL) { 3859 yyerror("illegal state timeout %s", $1); 3860 free($1); 3861 YYERROR; 3862 } 3863 free($1); 3864 $$ = calloc(1, sizeof(struct node_state_opt)); 3865 if ($$ == NULL) 3866 err(1, "state_opt_item: calloc"); 3867 $$->type = PF_STATE_OPT_TIMEOUT; 3868 $$->data.timeout.number = pf_timeouts[i].timeout; 3869 $$->data.timeout.seconds = $2; 3870 $$->next = NULL; 3871 $$->tail = $$; 3872 } 3873 ; 3874 3875 label : LABEL STRING { 3876 $$ = $2; 3877 } 3878 ; 3879 3880 qname : QUEUE STRING { 3881 $$.qname = $2; 3882 $$.pqname = NULL; 3883 } 3884 | QUEUE '(' STRING ')' { 3885 $$.qname = $3; 3886 $$.pqname = NULL; 3887 } 3888 | QUEUE '(' STRING comma STRING ')' { 3889 $$.qname = $3; 3890 $$.pqname = $5; 3891 } 3892 ; 3893 3894 no : /* empty */ { $$ = 0; } 3895 | NO { $$ = 1; } 3896 ; 3897 3898 portstar : numberstring { 3899 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) { 3900 free($1); 3901 YYERROR; 3902 } 3903 free($1); 3904 } 3905 ; 3906 3907 redirspec : host { $$ = $1; } 3908 | '{' optnl redir_host_list '}' { $$ = $3; } 3909 ; 3910 3911 redir_host_list : host optnl { $$ = $1; } 3912 | redir_host_list comma host optnl { 3913 $1->tail->next = $3; 3914 $1->tail = $3->tail; 3915 $$ = $1; 3916 } 3917 ; 3918 3919 redirpool : /* empty */ { $$ = NULL; } 3920 | ARROW redirspec { 3921 $$ = calloc(1, sizeof(struct redirection)); 3922 if ($$ == NULL) 3923 err(1, "redirection: calloc"); 3924 $$->host = $2; 3925 $$->rport.a = $$->rport.b = $$->rport.t = 0; 3926 } 3927 | ARROW redirspec PORT portstar { 3928 $$ = calloc(1, sizeof(struct redirection)); 3929 if ($$ == NULL) 3930 err(1, "redirection: calloc"); 3931 $$->host = $2; 3932 $$->rport = $4; 3933 } 3934 ; 3935 3936 hashkey : /* empty */ 3937 { 3938 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 3939 if ($$ == NULL) 3940 err(1, "hashkey: calloc"); 3941 $$->key32[0] = arc4random(); 3942 $$->key32[1] = arc4random(); 3943 $$->key32[2] = arc4random(); 3944 $$->key32[3] = arc4random(); 3945 } 3946 | string 3947 { 3948 if (!strncmp($1, "0x", 2)) { 3949 if (strlen($1) != 34) { 3950 free($1); 3951 yyerror("hex key must be 128 bits " 3952 "(32 hex digits) long"); 3953 YYERROR; 3954 } 3955 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 3956 if ($$ == NULL) 3957 err(1, "hashkey: calloc"); 3958 3959 if (sscanf($1, "0x%8x%8x%8x%8x", 3960 &$$->key32[0], &$$->key32[1], 3961 &$$->key32[2], &$$->key32[3]) != 4) { 3962 free($$); 3963 free($1); 3964 yyerror("invalid hex key"); 3965 YYERROR; 3966 } 3967 } else { 3968 MD5_CTX context; 3969 3970 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 3971 if ($$ == NULL) 3972 err(1, "hashkey: calloc"); 3973 MD5Init(&context); 3974 MD5Update(&context, (unsigned char *)$1, 3975 strlen($1)); 3976 MD5Final((unsigned char *)$$, &context); 3977 HTONL($$->key32[0]); 3978 HTONL($$->key32[1]); 3979 HTONL($$->key32[2]); 3980 HTONL($$->key32[3]); 3981 } 3982 free($1); 3983 } 3984 ; 3985 3986 pool_opts : { bzero(&pool_opts, sizeof pool_opts); } 3987 pool_opts_l 3988 { $$ = pool_opts; } 3989 | /* empty */ { 3990 bzero(&pool_opts, sizeof pool_opts); 3991 $$ = pool_opts; 3992 } 3993 ; 3994 3995 pool_opts_l : pool_opts_l pool_opt 3996 | pool_opt 3997 ; 3998 3999 pool_opt : BITMASK { 4000 if (pool_opts.type) { 4001 yyerror("pool type cannot be redefined"); 4002 YYERROR; 4003 } 4004 pool_opts.type = PF_POOL_BITMASK; 4005 } 4006 | RANDOM { 4007 if (pool_opts.type) { 4008 yyerror("pool type cannot be redefined"); 4009 YYERROR; 4010 } 4011 pool_opts.type = PF_POOL_RANDOM; 4012 } 4013 | SOURCEHASH hashkey { 4014 if (pool_opts.type) { 4015 yyerror("pool type cannot be redefined"); 4016 YYERROR; 4017 } 4018 pool_opts.type = PF_POOL_SRCHASH; 4019 pool_opts.key = $2; 4020 } 4021 | ROUNDROBIN { 4022 if (pool_opts.type) { 4023 yyerror("pool type cannot be redefined"); 4024 YYERROR; 4025 } 4026 pool_opts.type = PF_POOL_ROUNDROBIN; 4027 } 4028 | STATICPORT { 4029 if (pool_opts.staticport) { 4030 yyerror("static-port cannot be redefined"); 4031 YYERROR; 4032 } 4033 pool_opts.staticport = 1; 4034 } 4035 | STICKYADDRESS { 4036 if (filter_opts.marker & POM_STICKYADDRESS) { 4037 yyerror("sticky-address cannot be redefined"); 4038 YYERROR; 4039 } 4040 pool_opts.marker |= POM_STICKYADDRESS; 4041 pool_opts.opts |= PF_POOL_STICKYADDR; 4042 } 4043 | MAPEPORTSET number '/' number '/' number { 4044 if (pool_opts.mape.offset) { 4045 yyerror("map-e-portset cannot be redefined"); 4046 YYERROR; 4047 } 4048 if (pool_opts.type) { 4049 yyerror("map-e-portset cannot be used with " 4050 "address pools"); 4051 YYERROR; 4052 } 4053 if ($2 <= 0 || $2 >= 16) { 4054 yyerror("MAP-E PSID offset must be 1-15"); 4055 YYERROR; 4056 } 4057 if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) { 4058 yyerror("Invalid MAP-E PSID length"); 4059 YYERROR; 4060 } else if ($4 == 0) { 4061 yyerror("PSID Length = 0: this means" 4062 " you do not need MAP-E"); 4063 YYERROR; 4064 } 4065 if ($6 < 0 || $6 > 65535) { 4066 yyerror("Invalid MAP-E PSID"); 4067 YYERROR; 4068 } 4069 pool_opts.mape.offset = $2; 4070 pool_opts.mape.psidlen = $4; 4071 pool_opts.mape.psid = $6; 4072 } 4073 ; 4074 4075 redirection : /* empty */ { $$ = NULL; } 4076 | ARROW host { 4077 $$ = calloc(1, sizeof(struct redirection)); 4078 if ($$ == NULL) 4079 err(1, "redirection: calloc"); 4080 $$->host = $2; 4081 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4082 } 4083 | ARROW host PORT portstar { 4084 $$ = calloc(1, sizeof(struct redirection)); 4085 if ($$ == NULL) 4086 err(1, "redirection: calloc"); 4087 $$->host = $2; 4088 $$->rport = $4; 4089 } 4090 ; 4091 4092 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; } 4093 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; } 4094 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; } 4095 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; } 4096 ; 4097 4098 nataction : no NAT natpasslog { 4099 if ($1 && $3.b1) { 4100 yyerror("\"pass\" not valid with \"no\""); 4101 YYERROR; 4102 } 4103 if ($1) 4104 $$.b1 = PF_NONAT; 4105 else 4106 $$.b1 = PF_NAT; 4107 $$.b2 = $3.b1; 4108 $$.w = $3.b2; 4109 $$.w2 = $3.w2; 4110 } 4111 | no RDR natpasslog { 4112 if ($1 && $3.b1) { 4113 yyerror("\"pass\" not valid with \"no\""); 4114 YYERROR; 4115 } 4116 if ($1) 4117 $$.b1 = PF_NORDR; 4118 else 4119 $$.b1 = PF_RDR; 4120 $$.b2 = $3.b1; 4121 $$.w = $3.b2; 4122 $$.w2 = $3.w2; 4123 } 4124 ; 4125 4126 natrule : nataction interface af proto fromto tag tagged rtable 4127 redirpool pool_opts 4128 { 4129 struct pfctl_rule r; 4130 4131 if (check_rulestate(PFCTL_STATE_NAT)) 4132 YYERROR; 4133 4134 memset(&r, 0, sizeof(r)); 4135 4136 r.action = $1.b1; 4137 r.natpass = $1.b2; 4138 r.log = $1.w; 4139 r.logif = $1.w2; 4140 r.af = $3; 4141 4142 if (!r.af) { 4143 if ($5.src.host && $5.src.host->af && 4144 !$5.src.host->ifindex) 4145 r.af = $5.src.host->af; 4146 else if ($5.dst.host && $5.dst.host->af && 4147 !$5.dst.host->ifindex) 4148 r.af = $5.dst.host->af; 4149 } 4150 4151 if ($6 != NULL) 4152 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >= 4153 PF_TAG_NAME_SIZE) { 4154 yyerror("tag too long, max %u chars", 4155 PF_TAG_NAME_SIZE - 1); 4156 YYERROR; 4157 } 4158 4159 if ($7.name) 4160 if (strlcpy(r.match_tagname, $7.name, 4161 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4162 yyerror("tag too long, max %u chars", 4163 PF_TAG_NAME_SIZE - 1); 4164 YYERROR; 4165 } 4166 r.match_tag_not = $7.neg; 4167 r.rtableid = $8; 4168 4169 if (r.action == PF_NONAT || r.action == PF_NORDR) { 4170 if ($9 != NULL) { 4171 yyerror("translation rule with 'no' " 4172 "does not need '->'"); 4173 YYERROR; 4174 } 4175 } else { 4176 if ($9 == NULL || $9->host == NULL) { 4177 yyerror("translation rule requires '-> " 4178 "address'"); 4179 YYERROR; 4180 } 4181 if (!r.af && ! $9->host->ifindex) 4182 r.af = $9->host->af; 4183 4184 remove_invalid_hosts(&$9->host, &r.af); 4185 if (invalid_redirect($9->host, r.af)) 4186 YYERROR; 4187 if (check_netmask($9->host, r.af)) 4188 YYERROR; 4189 4190 r.rpool.proxy_port[0] = ntohs($9->rport.a); 4191 4192 switch (r.action) { 4193 case PF_RDR: 4194 if (!$9->rport.b && $9->rport.t && 4195 $5.dst.port != NULL) { 4196 r.rpool.proxy_port[1] = 4197 ntohs($9->rport.a) + 4198 (ntohs( 4199 $5.dst.port->port[1]) - 4200 ntohs( 4201 $5.dst.port->port[0])); 4202 } else 4203 r.rpool.proxy_port[1] = 4204 ntohs($9->rport.b); 4205 break; 4206 case PF_NAT: 4207 r.rpool.proxy_port[1] = 4208 ntohs($9->rport.b); 4209 if (!r.rpool.proxy_port[0] && 4210 !r.rpool.proxy_port[1]) { 4211 r.rpool.proxy_port[0] = 4212 PF_NAT_PROXY_PORT_LOW; 4213 r.rpool.proxy_port[1] = 4214 PF_NAT_PROXY_PORT_HIGH; 4215 } else if (!r.rpool.proxy_port[1]) 4216 r.rpool.proxy_port[1] = 4217 r.rpool.proxy_port[0]; 4218 break; 4219 default: 4220 break; 4221 } 4222 4223 r.rpool.opts = $10.type; 4224 if ((r.rpool.opts & PF_POOL_TYPEMASK) == 4225 PF_POOL_NONE && ($9->host->next != NULL || 4226 $9->host->addr.type == PF_ADDR_TABLE || 4227 DYNIF_MULTIADDR($9->host->addr))) 4228 r.rpool.opts = PF_POOL_ROUNDROBIN; 4229 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4230 PF_POOL_ROUNDROBIN && 4231 disallow_table($9->host, "tables are only " 4232 "supported in round-robin redirection " 4233 "pools")) 4234 YYERROR; 4235 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4236 PF_POOL_ROUNDROBIN && 4237 disallow_alias($9->host, "interface (%s) " 4238 "is only supported in round-robin " 4239 "redirection pools")) 4240 YYERROR; 4241 if ($9->host->next != NULL) { 4242 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4243 PF_POOL_ROUNDROBIN) { 4244 yyerror("only round-robin " 4245 "valid for multiple " 4246 "redirection addresses"); 4247 YYERROR; 4248 } 4249 } 4250 } 4251 4252 if ($10.key != NULL) 4253 memcpy(&r.rpool.key, $10.key, 4254 sizeof(struct pf_poolhashkey)); 4255 4256 if ($10.opts) 4257 r.rpool.opts |= $10.opts; 4258 4259 if ($10.staticport) { 4260 if (r.action != PF_NAT) { 4261 yyerror("the 'static-port' option is " 4262 "only valid with nat rules"); 4263 YYERROR; 4264 } 4265 if (r.rpool.proxy_port[0] != 4266 PF_NAT_PROXY_PORT_LOW && 4267 r.rpool.proxy_port[1] != 4268 PF_NAT_PROXY_PORT_HIGH) { 4269 yyerror("the 'static-port' option can't" 4270 " be used when specifying a port" 4271 " range"); 4272 YYERROR; 4273 } 4274 r.rpool.proxy_port[0] = 0; 4275 r.rpool.proxy_port[1] = 0; 4276 } 4277 4278 if ($10.mape.offset) { 4279 if (r.action != PF_NAT) { 4280 yyerror("the 'map-e-portset' option is" 4281 " only valid with nat rules"); 4282 YYERROR; 4283 } 4284 if ($10.staticport) { 4285 yyerror("the 'map-e-portset' option" 4286 " can't be used 'static-port'"); 4287 YYERROR; 4288 } 4289 if (r.rpool.proxy_port[0] != 4290 PF_NAT_PROXY_PORT_LOW && 4291 r.rpool.proxy_port[1] != 4292 PF_NAT_PROXY_PORT_HIGH) { 4293 yyerror("the 'map-e-portset' option" 4294 " can't be used when specifying" 4295 " a port range"); 4296 YYERROR; 4297 } 4298 r.rpool.mape = $10.mape; 4299 } 4300 4301 expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4, 4302 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 4303 $5.dst.port, 0, 0, 0, ""); 4304 free($9); 4305 } 4306 ; 4307 4308 binatrule : no BINAT natpasslog interface af proto FROM ipspec toipspec tag 4309 tagged rtable redirection 4310 { 4311 struct pfctl_rule binat; 4312 struct pf_pooladdr *pa; 4313 4314 if (check_rulestate(PFCTL_STATE_NAT)) 4315 YYERROR; 4316 if (disallow_urpf_failed($9, "\"urpf-failed\" is not " 4317 "permitted as a binat destination")) 4318 YYERROR; 4319 4320 memset(&binat, 0, sizeof(binat)); 4321 4322 if ($1 && $3.b1) { 4323 yyerror("\"pass\" not valid with \"no\""); 4324 YYERROR; 4325 } 4326 if ($1) 4327 binat.action = PF_NOBINAT; 4328 else 4329 binat.action = PF_BINAT; 4330 binat.natpass = $3.b1; 4331 binat.log = $3.b2; 4332 binat.logif = $3.w2; 4333 binat.af = $5; 4334 if (!binat.af && $8 != NULL && $8->af) 4335 binat.af = $8->af; 4336 if (!binat.af && $9 != NULL && $9->af) 4337 binat.af = $9->af; 4338 4339 if (!binat.af && $13 != NULL && $13->host) 4340 binat.af = $13->host->af; 4341 if (!binat.af) { 4342 yyerror("address family (inet/inet6) " 4343 "undefined"); 4344 YYERROR; 4345 } 4346 4347 if ($4 != NULL) { 4348 memcpy(binat.ifname, $4->ifname, 4349 sizeof(binat.ifname)); 4350 binat.ifnot = $4->not; 4351 free($4); 4352 } 4353 4354 if ($10 != NULL) 4355 if (strlcpy(binat.tagname, $10, 4356 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4357 yyerror("tag too long, max %u chars", 4358 PF_TAG_NAME_SIZE - 1); 4359 YYERROR; 4360 } 4361 if ($11.name) 4362 if (strlcpy(binat.match_tagname, $11.name, 4363 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4364 yyerror("tag too long, max %u chars", 4365 PF_TAG_NAME_SIZE - 1); 4366 YYERROR; 4367 } 4368 binat.match_tag_not = $11.neg; 4369 binat.rtableid = $12; 4370 4371 if ($6 != NULL) { 4372 binat.proto = $6->proto; 4373 free($6); 4374 } 4375 4376 if ($8 != NULL && disallow_table($8, "invalid use of " 4377 "table <%s> as the source address of a binat rule")) 4378 YYERROR; 4379 if ($8 != NULL && disallow_alias($8, "invalid use of " 4380 "interface (%s) as the source address of a binat " 4381 "rule")) 4382 YYERROR; 4383 if ($13 != NULL && $13->host != NULL && disallow_table( 4384 $13->host, "invalid use of table <%s> as the " 4385 "redirect address of a binat rule")) 4386 YYERROR; 4387 if ($13 != NULL && $13->host != NULL && disallow_alias( 4388 $13->host, "invalid use of interface (%s) as the " 4389 "redirect address of a binat rule")) 4390 YYERROR; 4391 4392 if ($8 != NULL) { 4393 if ($8->next) { 4394 yyerror("multiple binat ip addresses"); 4395 YYERROR; 4396 } 4397 if ($8->addr.type == PF_ADDR_DYNIFTL) 4398 $8->af = binat.af; 4399 if ($8->af != binat.af) { 4400 yyerror("binat ip versions must match"); 4401 YYERROR; 4402 } 4403 if (check_netmask($8, binat.af)) 4404 YYERROR; 4405 memcpy(&binat.src.addr, &$8->addr, 4406 sizeof(binat.src.addr)); 4407 free($8); 4408 } 4409 if ($9 != NULL) { 4410 if ($9->next) { 4411 yyerror("multiple binat ip addresses"); 4412 YYERROR; 4413 } 4414 if ($9->af != binat.af && $9->af) { 4415 yyerror("binat ip versions must match"); 4416 YYERROR; 4417 } 4418 if (check_netmask($9, binat.af)) 4419 YYERROR; 4420 memcpy(&binat.dst.addr, &$9->addr, 4421 sizeof(binat.dst.addr)); 4422 binat.dst.neg = $9->not; 4423 free($9); 4424 } 4425 4426 if (binat.action == PF_NOBINAT) { 4427 if ($13 != NULL) { 4428 yyerror("'no binat' rule does not need" 4429 " '->'"); 4430 YYERROR; 4431 } 4432 } else { 4433 if ($13 == NULL || $13->host == NULL) { 4434 yyerror("'binat' rule requires" 4435 " '-> address'"); 4436 YYERROR; 4437 } 4438 4439 remove_invalid_hosts(&$13->host, &binat.af); 4440 if (invalid_redirect($13->host, binat.af)) 4441 YYERROR; 4442 if ($13->host->next != NULL) { 4443 yyerror("binat rule must redirect to " 4444 "a single address"); 4445 YYERROR; 4446 } 4447 if (check_netmask($13->host, binat.af)) 4448 YYERROR; 4449 4450 if (!PF_AZERO(&binat.src.addr.v.a.mask, 4451 binat.af) && 4452 !PF_AEQ(&binat.src.addr.v.a.mask, 4453 &$13->host->addr.v.a.mask, binat.af)) { 4454 yyerror("'binat' source mask and " 4455 "redirect mask must be the same"); 4456 YYERROR; 4457 } 4458 4459 TAILQ_INIT(&binat.rpool.list); 4460 pa = calloc(1, sizeof(struct pf_pooladdr)); 4461 if (pa == NULL) 4462 err(1, "binat: calloc"); 4463 pa->addr = $13->host->addr; 4464 pa->ifname[0] = 0; 4465 TAILQ_INSERT_TAIL(&binat.rpool.list, 4466 pa, entries); 4467 4468 free($13); 4469 } 4470 4471 pfctl_append_rule(pf, &binat, ""); 4472 } 4473 ; 4474 4475 tag : /* empty */ { $$ = NULL; } 4476 | TAG STRING { $$ = $2; } 4477 ; 4478 4479 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; } 4480 | not TAGGED string { $$.neg = $1; $$.name = $3; } 4481 ; 4482 4483 rtable : /* empty */ { $$ = -1; } 4484 | RTABLE NUMBER { 4485 if ($2 < 0 || $2 > rt_tableid_max()) { 4486 yyerror("invalid rtable id"); 4487 YYERROR; 4488 } 4489 $$ = $2; 4490 } 4491 ; 4492 4493 route_host : STRING { 4494 $$ = calloc(1, sizeof(struct node_host)); 4495 if ($$ == NULL) 4496 err(1, "route_host: calloc"); 4497 $$->ifname = strdup($1); 4498 set_ipmask($$, 128); 4499 $$->next = NULL; 4500 $$->tail = $$; 4501 } 4502 | '(' STRING host ')' { 4503 struct node_host *n; 4504 4505 $$ = $3; 4506 for (n = $3; n != NULL; n = n->next) 4507 n->ifname = strdup($2); 4508 } 4509 ; 4510 4511 route_host_list : route_host optnl { $$ = $1; } 4512 | route_host_list comma route_host optnl { 4513 if ($1->af == 0) 4514 $1->af = $3->af; 4515 if ($1->af != $3->af) { 4516 yyerror("all pool addresses must be in the " 4517 "same address family"); 4518 YYERROR; 4519 } 4520 $1->tail->next = $3; 4521 $1->tail = $3->tail; 4522 $$ = $1; 4523 } 4524 ; 4525 4526 routespec : route_host { $$ = $1; } 4527 | '{' optnl route_host_list '}' { $$ = $3; } 4528 ; 4529 4530 route : /* empty */ { 4531 $$.host = NULL; 4532 $$.rt = 0; 4533 $$.pool_opts = 0; 4534 } 4535 | FASTROUTE { 4536 /* backwards-compat */ 4537 $$.host = NULL; 4538 $$.rt = 0; 4539 $$.pool_opts = 0; 4540 } 4541 | ROUTETO routespec pool_opts { 4542 $$.host = $2; 4543 $$.rt = PF_ROUTETO; 4544 $$.pool_opts = $3.type | $3.opts; 4545 if ($3.key != NULL) 4546 $$.key = $3.key; 4547 } 4548 | REPLYTO routespec pool_opts { 4549 $$.host = $2; 4550 $$.rt = PF_REPLYTO; 4551 $$.pool_opts = $3.type | $3.opts; 4552 if ($3.key != NULL) 4553 $$.key = $3.key; 4554 } 4555 | DUPTO routespec pool_opts { 4556 $$.host = $2; 4557 $$.rt = PF_DUPTO; 4558 $$.pool_opts = $3.type | $3.opts; 4559 if ($3.key != NULL) 4560 $$.key = $3.key; 4561 } 4562 ; 4563 4564 timeout_spec : STRING NUMBER 4565 { 4566 if (check_rulestate(PFCTL_STATE_OPTION)) { 4567 free($1); 4568 YYERROR; 4569 } 4570 if ($2 < 0 || $2 > UINT_MAX) { 4571 yyerror("only positive values permitted"); 4572 YYERROR; 4573 } 4574 if (pfctl_set_timeout(pf, $1, $2, 0) != 0) { 4575 yyerror("unknown timeout %s", $1); 4576 free($1); 4577 YYERROR; 4578 } 4579 free($1); 4580 } 4581 | INTERVAL NUMBER { 4582 if (check_rulestate(PFCTL_STATE_OPTION)) 4583 YYERROR; 4584 if ($2 < 0 || $2 > UINT_MAX) { 4585 yyerror("only positive values permitted"); 4586 YYERROR; 4587 } 4588 if (pfctl_set_timeout(pf, "interval", $2, 0) != 0) 4589 YYERROR; 4590 } 4591 ; 4592 4593 timeout_list : timeout_list comma timeout_spec optnl 4594 | timeout_spec optnl 4595 ; 4596 4597 limit_spec : STRING NUMBER 4598 { 4599 if (check_rulestate(PFCTL_STATE_OPTION)) { 4600 free($1); 4601 YYERROR; 4602 } 4603 if ($2 < 0 || $2 > UINT_MAX) { 4604 yyerror("only positive values permitted"); 4605 YYERROR; 4606 } 4607 if (pfctl_set_limit(pf, $1, $2) != 0) { 4608 yyerror("unable to set limit %s %u", $1, $2); 4609 free($1); 4610 YYERROR; 4611 } 4612 free($1); 4613 } 4614 ; 4615 4616 limit_list : limit_list comma limit_spec optnl 4617 | limit_spec optnl 4618 ; 4619 4620 comma : ',' 4621 | /* empty */ 4622 ; 4623 4624 yesno : NO { $$ = 0; } 4625 | STRING { 4626 if (!strcmp($1, "yes")) 4627 $$ = 1; 4628 else { 4629 yyerror("invalid value '%s', expected 'yes' " 4630 "or 'no'", $1); 4631 free($1); 4632 YYERROR; 4633 } 4634 free($1); 4635 } 4636 ; 4637 4638 unaryop : '=' { $$ = PF_OP_EQ; } 4639 | '!' '=' { $$ = PF_OP_NE; } 4640 | '<' '=' { $$ = PF_OP_LE; } 4641 | '<' { $$ = PF_OP_LT; } 4642 | '>' '=' { $$ = PF_OP_GE; } 4643 | '>' { $$ = PF_OP_GT; } 4644 ; 4645 4646 %% 4647 4648 int 4649 yyerror(const char *fmt, ...) 4650 { 4651 va_list ap; 4652 4653 file->errors++; 4654 va_start(ap, fmt); 4655 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno); 4656 vfprintf(stderr, fmt, ap); 4657 fprintf(stderr, "\n"); 4658 va_end(ap); 4659 return (0); 4660 } 4661 4662 int 4663 disallow_table(struct node_host *h, const char *fmt) 4664 { 4665 for (; h != NULL; h = h->next) 4666 if (h->addr.type == PF_ADDR_TABLE) { 4667 yyerror(fmt, h->addr.v.tblname); 4668 return (1); 4669 } 4670 return (0); 4671 } 4672 4673 int 4674 disallow_urpf_failed(struct node_host *h, const char *fmt) 4675 { 4676 for (; h != NULL; h = h->next) 4677 if (h->addr.type == PF_ADDR_URPFFAILED) { 4678 yyerror(fmt); 4679 return (1); 4680 } 4681 return (0); 4682 } 4683 4684 int 4685 disallow_alias(struct node_host *h, const char *fmt) 4686 { 4687 for (; h != NULL; h = h->next) 4688 if (DYNIF_MULTIADDR(h->addr)) { 4689 yyerror(fmt, h->addr.v.tblname); 4690 return (1); 4691 } 4692 return (0); 4693 } 4694 4695 int 4696 rule_consistent(struct pfctl_rule *r, int anchor_call) 4697 { 4698 int problems = 0; 4699 4700 switch (r->action) { 4701 case PF_PASS: 4702 case PF_DROP: 4703 case PF_SCRUB: 4704 case PF_NOSCRUB: 4705 problems = filter_consistent(r, anchor_call); 4706 break; 4707 case PF_NAT: 4708 case PF_NONAT: 4709 problems = nat_consistent(r); 4710 break; 4711 case PF_RDR: 4712 case PF_NORDR: 4713 problems = rdr_consistent(r); 4714 break; 4715 case PF_BINAT: 4716 case PF_NOBINAT: 4717 default: 4718 break; 4719 } 4720 return (problems); 4721 } 4722 4723 int 4724 filter_consistent(struct pfctl_rule *r, int anchor_call) 4725 { 4726 int problems = 0; 4727 4728 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 4729 (r->src.port_op || r->dst.port_op)) { 4730 yyerror("port only applies to tcp/udp"); 4731 problems++; 4732 } 4733 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 4734 (r->type || r->code)) { 4735 yyerror("icmp-type/code only applies to icmp"); 4736 problems++; 4737 } 4738 if (!r->af && (r->type || r->code)) { 4739 yyerror("must indicate address family with icmp-type/code"); 4740 problems++; 4741 } 4742 if (r->overload_tblname[0] && 4743 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) { 4744 yyerror("'overload' requires 'max-src-conn' " 4745 "or 'max-src-conn-rate'"); 4746 problems++; 4747 } 4748 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 4749 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 4750 yyerror("proto %s doesn't match address family %s", 4751 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 4752 r->af == AF_INET ? "inet" : "inet6"); 4753 problems++; 4754 } 4755 if (r->allow_opts && r->action != PF_PASS) { 4756 yyerror("allow-opts can only be specified for pass rules"); 4757 problems++; 4758 } 4759 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 4760 r->dst.port_op || r->flagset || r->type || r->code)) { 4761 yyerror("fragments can be filtered only on IP header fields"); 4762 problems++; 4763 } 4764 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 4765 yyerror("return-rst can only be applied to TCP rules"); 4766 problems++; 4767 } 4768 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) { 4769 yyerror("max-src-nodes requires 'source-track rule'"); 4770 problems++; 4771 } 4772 if (r->action == PF_DROP && r->keep_state) { 4773 yyerror("keep state on block rules doesn't make sense"); 4774 problems++; 4775 } 4776 if (r->rule_flag & PFRULE_STATESLOPPY && 4777 (r->keep_state == PF_STATE_MODULATE || 4778 r->keep_state == PF_STATE_SYNPROXY)) { 4779 yyerror("sloppy state matching cannot be used with " 4780 "synproxy state or modulate state"); 4781 problems++; 4782 } 4783 return (-problems); 4784 } 4785 4786 int 4787 nat_consistent(struct pfctl_rule *r) 4788 { 4789 return (0); /* yeah! */ 4790 } 4791 4792 int 4793 rdr_consistent(struct pfctl_rule *r) 4794 { 4795 int problems = 0; 4796 4797 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) { 4798 if (r->src.port_op) { 4799 yyerror("src port only applies to tcp/udp"); 4800 problems++; 4801 } 4802 if (r->dst.port_op) { 4803 yyerror("dst port only applies to tcp/udp"); 4804 problems++; 4805 } 4806 if (r->rpool.proxy_port[0]) { 4807 yyerror("rpool port only applies to tcp/udp"); 4808 problems++; 4809 } 4810 } 4811 if (r->dst.port_op && 4812 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 4813 yyerror("invalid port operator for rdr destination port"); 4814 problems++; 4815 } 4816 return (-problems); 4817 } 4818 4819 int 4820 process_tabledef(char *name, struct table_opts *opts) 4821 { 4822 struct pfr_buffer ab; 4823 struct node_tinit *ti; 4824 unsigned long maxcount; 4825 size_t s = sizeof(maxcount); 4826 4827 bzero(&ab, sizeof(ab)); 4828 ab.pfrb_type = PFRB_ADDRS; 4829 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 4830 if (ti->file) 4831 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) { 4832 if (errno) 4833 yyerror("cannot load \"%s\": %s", 4834 ti->file, strerror(errno)); 4835 else 4836 yyerror("file \"%s\" contains bad data", 4837 ti->file); 4838 goto _error; 4839 } 4840 if (ti->host) 4841 if (append_addr_host(&ab, ti->host, 0, 0)) { 4842 yyerror("cannot create address buffer: %s", 4843 strerror(errno)); 4844 goto _error; 4845 } 4846 } 4847 if (pf->opts & PF_OPT_VERBOSE) 4848 print_tabledef(name, opts->flags, opts->init_addr, 4849 &opts->init_nodes); 4850 if (!(pf->opts & PF_OPT_NOACTION) && 4851 pfctl_define_table(name, opts->flags, opts->init_addr, 4852 pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) { 4853 4854 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s, 4855 NULL, 0) == -1) 4856 maxcount = 65535; 4857 4858 if (ab.pfrb_size > maxcount) 4859 yyerror("cannot define table %s: too many elements.\n" 4860 "Consider increasing net.pf.request_maxcount.", 4861 name); 4862 else 4863 yyerror("cannot define table %s: %s", name, 4864 pfr_strerror(errno)); 4865 4866 goto _error; 4867 } 4868 pf->tdirty = 1; 4869 pfr_buf_clear(&ab); 4870 return (0); 4871 _error: 4872 pfr_buf_clear(&ab); 4873 return (-1); 4874 } 4875 4876 struct keywords { 4877 const char *k_name; 4878 int k_val; 4879 }; 4880 4881 /* macro gore, but you should've seen the prior indentation nightmare... */ 4882 4883 #define FREE_LIST(T,r) \ 4884 do { \ 4885 T *p, *node = r; \ 4886 while (node != NULL) { \ 4887 p = node; \ 4888 node = node->next; \ 4889 free(p); \ 4890 } \ 4891 } while (0) 4892 4893 #define LOOP_THROUGH(T,n,r,C) \ 4894 do { \ 4895 T *n; \ 4896 if (r == NULL) { \ 4897 r = calloc(1, sizeof(T)); \ 4898 if (r == NULL) \ 4899 err(1, "LOOP: calloc"); \ 4900 r->next = NULL; \ 4901 } \ 4902 n = r; \ 4903 while (n != NULL) { \ 4904 do { \ 4905 C; \ 4906 } while (0); \ 4907 n = n->next; \ 4908 } \ 4909 } while (0) 4910 4911 void 4912 expand_label_str(char *label, size_t len, const char *srch, const char *repl) 4913 { 4914 char *tmp; 4915 char *p, *q; 4916 4917 if ((tmp = calloc(1, len)) == NULL) 4918 err(1, "expand_label_str: calloc"); 4919 p = q = label; 4920 while ((q = strstr(p, srch)) != NULL) { 4921 *q = '\0'; 4922 if ((strlcat(tmp, p, len) >= len) || 4923 (strlcat(tmp, repl, len) >= len)) 4924 errx(1, "expand_label: label too long"); 4925 q += strlen(srch); 4926 p = q; 4927 } 4928 if (strlcat(tmp, p, len) >= len) 4929 errx(1, "expand_label: label too long"); 4930 strlcpy(label, tmp, len); /* always fits */ 4931 free(tmp); 4932 } 4933 4934 void 4935 expand_label_if(const char *name, char *label, size_t len, const char *ifname) 4936 { 4937 if (strstr(label, name) != NULL) { 4938 if (!*ifname) 4939 expand_label_str(label, len, name, "any"); 4940 else 4941 expand_label_str(label, len, name, ifname); 4942 } 4943 } 4944 4945 void 4946 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af, 4947 struct node_host *h) 4948 { 4949 char tmp[64], tmp_not[66]; 4950 4951 if (strstr(label, name) != NULL) { 4952 switch (h->addr.type) { 4953 case PF_ADDR_DYNIFTL: 4954 snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname); 4955 break; 4956 case PF_ADDR_TABLE: 4957 snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname); 4958 break; 4959 case PF_ADDR_NOROUTE: 4960 snprintf(tmp, sizeof(tmp), "no-route"); 4961 break; 4962 case PF_ADDR_URPFFAILED: 4963 snprintf(tmp, sizeof(tmp), "urpf-failed"); 4964 break; 4965 case PF_ADDR_ADDRMASK: 4966 if (!af || (PF_AZERO(&h->addr.v.a.addr, af) && 4967 PF_AZERO(&h->addr.v.a.mask, af))) 4968 snprintf(tmp, sizeof(tmp), "any"); 4969 else { 4970 char a[48]; 4971 int bits; 4972 4973 if (inet_ntop(af, &h->addr.v.a.addr, a, 4974 sizeof(a)) == NULL) 4975 snprintf(tmp, sizeof(tmp), "?"); 4976 else { 4977 bits = unmask(&h->addr.v.a.mask, af); 4978 if ((af == AF_INET && bits < 32) || 4979 (af == AF_INET6 && bits < 128)) 4980 snprintf(tmp, sizeof(tmp), 4981 "%s/%d", a, bits); 4982 else 4983 snprintf(tmp, sizeof(tmp), 4984 "%s", a); 4985 } 4986 } 4987 break; 4988 default: 4989 snprintf(tmp, sizeof(tmp), "?"); 4990 break; 4991 } 4992 4993 if (h->not) { 4994 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 4995 expand_label_str(label, len, name, tmp_not); 4996 } else 4997 expand_label_str(label, len, name, tmp); 4998 } 4999 } 5000 5001 void 5002 expand_label_port(const char *name, char *label, size_t len, 5003 struct node_port *port) 5004 { 5005 char a1[6], a2[6], op[13] = ""; 5006 5007 if (strstr(label, name) != NULL) { 5008 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0])); 5009 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1])); 5010 if (!port->op) 5011 ; 5012 else if (port->op == PF_OP_IRG) 5013 snprintf(op, sizeof(op), "%s><%s", a1, a2); 5014 else if (port->op == PF_OP_XRG) 5015 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 5016 else if (port->op == PF_OP_EQ) 5017 snprintf(op, sizeof(op), "%s", a1); 5018 else if (port->op == PF_OP_NE) 5019 snprintf(op, sizeof(op), "!=%s", a1); 5020 else if (port->op == PF_OP_LT) 5021 snprintf(op, sizeof(op), "<%s", a1); 5022 else if (port->op == PF_OP_LE) 5023 snprintf(op, sizeof(op), "<=%s", a1); 5024 else if (port->op == PF_OP_GT) 5025 snprintf(op, sizeof(op), ">%s", a1); 5026 else if (port->op == PF_OP_GE) 5027 snprintf(op, sizeof(op), ">=%s", a1); 5028 expand_label_str(label, len, name, op); 5029 } 5030 } 5031 5032 void 5033 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto) 5034 { 5035 const char *protoname; 5036 char n[4]; 5037 5038 if (strstr(label, name) != NULL) { 5039 protoname = pfctl_proto2name(proto); 5040 if (protoname != NULL) 5041 expand_label_str(label, len, name, protoname); 5042 else { 5043 snprintf(n, sizeof(n), "%u", proto); 5044 expand_label_str(label, len, name, n); 5045 } 5046 } 5047 } 5048 5049 void 5050 expand_label_nr(const char *name, char *label, size_t len) 5051 { 5052 char n[11]; 5053 5054 if (strstr(label, name) != NULL) { 5055 snprintf(n, sizeof(n), "%u", pf->anchor->match); 5056 expand_label_str(label, len, name, n); 5057 } 5058 } 5059 5060 void 5061 expand_label(char *label, size_t len, const char *ifname, sa_family_t af, 5062 struct node_host *src_host, struct node_port *src_port, 5063 struct node_host *dst_host, struct node_port *dst_port, 5064 u_int8_t proto) 5065 { 5066 expand_label_if("$if", label, len, ifname); 5067 expand_label_addr("$srcaddr", label, len, af, src_host); 5068 expand_label_addr("$dstaddr", label, len, af, dst_host); 5069 expand_label_port("$srcport", label, len, src_port); 5070 expand_label_port("$dstport", label, len, dst_port); 5071 expand_label_proto("$proto", label, len, proto); 5072 expand_label_nr("$nr", label, len); 5073 } 5074 5075 int 5076 expand_altq(struct pf_altq *a, struct node_if *interfaces, 5077 struct node_queue *nqueues, struct node_queue_bw bwspec, 5078 struct node_queue_opt *opts) 5079 { 5080 struct pf_altq pa, pb; 5081 char qname[PF_QNAME_SIZE]; 5082 struct node_queue *n; 5083 struct node_queue_bw bw; 5084 int errs = 0; 5085 5086 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5087 FREE_LIST(struct node_if, interfaces); 5088 if (nqueues) 5089 FREE_LIST(struct node_queue, nqueues); 5090 return (0); 5091 } 5092 5093 LOOP_THROUGH(struct node_if, interface, interfaces, 5094 memcpy(&pa, a, sizeof(struct pf_altq)); 5095 if (strlcpy(pa.ifname, interface->ifname, 5096 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5097 errx(1, "expand_altq: strlcpy"); 5098 5099 if (interface->not) { 5100 yyerror("altq on ! <interface> is not supported"); 5101 errs++; 5102 } else { 5103 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 5104 errs++; 5105 else 5106 if (pfctl_add_altq(pf, &pa)) 5107 errs++; 5108 5109 if (pf->opts & PF_OPT_VERBOSE) { 5110 print_altq(&pf->paltq->altq, 0, 5111 &bwspec, opts); 5112 if (nqueues && nqueues->tail) { 5113 printf("queue { "); 5114 LOOP_THROUGH(struct node_queue, queue, 5115 nqueues, 5116 printf("%s ", 5117 queue->queue); 5118 ); 5119 printf("}"); 5120 } 5121 printf("\n"); 5122 } 5123 5124 if (pa.scheduler == ALTQT_CBQ || 5125 pa.scheduler == ALTQT_HFSC || 5126 pa.scheduler == ALTQT_FAIRQ) { 5127 /* now create a root queue */ 5128 memset(&pb, 0, sizeof(struct pf_altq)); 5129 if (strlcpy(qname, "root_", sizeof(qname)) >= 5130 sizeof(qname)) 5131 errx(1, "expand_altq: strlcpy"); 5132 if (strlcat(qname, interface->ifname, 5133 sizeof(qname)) >= sizeof(qname)) 5134 errx(1, "expand_altq: strlcat"); 5135 if (strlcpy(pb.qname, qname, 5136 sizeof(pb.qname)) >= sizeof(pb.qname)) 5137 errx(1, "expand_altq: strlcpy"); 5138 if (strlcpy(pb.ifname, interface->ifname, 5139 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 5140 errx(1, "expand_altq: strlcpy"); 5141 pb.qlimit = pa.qlimit; 5142 pb.scheduler = pa.scheduler; 5143 bw.bw_absolute = pa.ifbandwidth; 5144 bw.bw_percent = 0; 5145 if (eval_pfqueue(pf, &pb, &bw, opts)) 5146 errs++; 5147 else 5148 if (pfctl_add_altq(pf, &pb)) 5149 errs++; 5150 } 5151 5152 LOOP_THROUGH(struct node_queue, queue, nqueues, 5153 n = calloc(1, sizeof(struct node_queue)); 5154 if (n == NULL) 5155 err(1, "expand_altq: calloc"); 5156 if (pa.scheduler == ALTQT_CBQ || 5157 pa.scheduler == ALTQT_HFSC || 5158 pa.scheduler == ALTQT_FAIRQ) 5159 if (strlcpy(n->parent, qname, 5160 sizeof(n->parent)) >= 5161 sizeof(n->parent)) 5162 errx(1, "expand_altq: strlcpy"); 5163 if (strlcpy(n->queue, queue->queue, 5164 sizeof(n->queue)) >= sizeof(n->queue)) 5165 errx(1, "expand_altq: strlcpy"); 5166 if (strlcpy(n->ifname, interface->ifname, 5167 sizeof(n->ifname)) >= sizeof(n->ifname)) 5168 errx(1, "expand_altq: strlcpy"); 5169 n->scheduler = pa.scheduler; 5170 n->next = NULL; 5171 n->tail = n; 5172 if (queues == NULL) 5173 queues = n; 5174 else { 5175 queues->tail->next = n; 5176 queues->tail = n; 5177 } 5178 ); 5179 } 5180 ); 5181 FREE_LIST(struct node_if, interfaces); 5182 if (nqueues) 5183 FREE_LIST(struct node_queue, nqueues); 5184 5185 return (errs); 5186 } 5187 5188 int 5189 expand_queue(struct pf_altq *a, struct node_if *interfaces, 5190 struct node_queue *nqueues, struct node_queue_bw bwspec, 5191 struct node_queue_opt *opts) 5192 { 5193 struct node_queue *n, *nq; 5194 struct pf_altq pa; 5195 u_int8_t found = 0; 5196 u_int8_t errs = 0; 5197 5198 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5199 FREE_LIST(struct node_queue, nqueues); 5200 return (0); 5201 } 5202 5203 if (queues == NULL) { 5204 yyerror("queue %s has no parent", a->qname); 5205 FREE_LIST(struct node_queue, nqueues); 5206 return (1); 5207 } 5208 5209 LOOP_THROUGH(struct node_if, interface, interfaces, 5210 LOOP_THROUGH(struct node_queue, tqueue, queues, 5211 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 5212 (interface->ifname[0] == 0 || 5213 (!interface->not && !strncmp(interface->ifname, 5214 tqueue->ifname, IFNAMSIZ)) || 5215 (interface->not && strncmp(interface->ifname, 5216 tqueue->ifname, IFNAMSIZ)))) { 5217 /* found ourself in queues */ 5218 found++; 5219 5220 memcpy(&pa, a, sizeof(struct pf_altq)); 5221 5222 if (pa.scheduler != ALTQT_NONE && 5223 pa.scheduler != tqueue->scheduler) { 5224 yyerror("exactly one scheduler type " 5225 "per interface allowed"); 5226 return (1); 5227 } 5228 pa.scheduler = tqueue->scheduler; 5229 5230 /* scheduler dependent error checking */ 5231 switch (pa.scheduler) { 5232 case ALTQT_PRIQ: 5233 if (nqueues != NULL) { 5234 yyerror("priq queues cannot " 5235 "have child queues"); 5236 return (1); 5237 } 5238 if (bwspec.bw_absolute > 0 || 5239 bwspec.bw_percent < 100) { 5240 yyerror("priq doesn't take " 5241 "bandwidth"); 5242 return (1); 5243 } 5244 break; 5245 default: 5246 break; 5247 } 5248 5249 if (strlcpy(pa.ifname, tqueue->ifname, 5250 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5251 errx(1, "expand_queue: strlcpy"); 5252 if (strlcpy(pa.parent, tqueue->parent, 5253 sizeof(pa.parent)) >= sizeof(pa.parent)) 5254 errx(1, "expand_queue: strlcpy"); 5255 5256 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 5257 errs++; 5258 else 5259 if (pfctl_add_altq(pf, &pa)) 5260 errs++; 5261 5262 for (nq = nqueues; nq != NULL; nq = nq->next) { 5263 if (!strcmp(a->qname, nq->queue)) { 5264 yyerror("queue cannot have " 5265 "itself as child"); 5266 errs++; 5267 continue; 5268 } 5269 n = calloc(1, 5270 sizeof(struct node_queue)); 5271 if (n == NULL) 5272 err(1, "expand_queue: calloc"); 5273 if (strlcpy(n->parent, a->qname, 5274 sizeof(n->parent)) >= 5275 sizeof(n->parent)) 5276 errx(1, "expand_queue strlcpy"); 5277 if (strlcpy(n->queue, nq->queue, 5278 sizeof(n->queue)) >= 5279 sizeof(n->queue)) 5280 errx(1, "expand_queue strlcpy"); 5281 if (strlcpy(n->ifname, tqueue->ifname, 5282 sizeof(n->ifname)) >= 5283 sizeof(n->ifname)) 5284 errx(1, "expand_queue strlcpy"); 5285 n->scheduler = tqueue->scheduler; 5286 n->next = NULL; 5287 n->tail = n; 5288 if (queues == NULL) 5289 queues = n; 5290 else { 5291 queues->tail->next = n; 5292 queues->tail = n; 5293 } 5294 } 5295 if ((pf->opts & PF_OPT_VERBOSE) && ( 5296 (found == 1 && interface->ifname[0] == 0) || 5297 (found > 0 && interface->ifname[0] != 0))) { 5298 print_queue(&pf->paltq->altq, 0, 5299 &bwspec, interface->ifname[0] != 0, 5300 opts); 5301 if (nqueues && nqueues->tail) { 5302 printf("{ "); 5303 LOOP_THROUGH(struct node_queue, 5304 queue, nqueues, 5305 printf("%s ", 5306 queue->queue); 5307 ); 5308 printf("}"); 5309 } 5310 printf("\n"); 5311 } 5312 } 5313 ); 5314 ); 5315 5316 FREE_LIST(struct node_queue, nqueues); 5317 FREE_LIST(struct node_if, interfaces); 5318 5319 if (!found) { 5320 yyerror("queue %s has no parent", a->qname); 5321 errs++; 5322 } 5323 5324 if (errs) 5325 return (1); 5326 else 5327 return (0); 5328 } 5329 5330 void 5331 expand_rule(struct pfctl_rule *r, 5332 struct node_if *interfaces, struct node_host *rpool_hosts, 5333 struct node_proto *protos, struct node_os *src_oses, 5334 struct node_host *src_hosts, struct node_port *src_ports, 5335 struct node_host *dst_hosts, struct node_port *dst_ports, 5336 struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types, 5337 const char *anchor_call) 5338 { 5339 sa_family_t af = r->af; 5340 int added = 0, error = 0; 5341 char ifname[IF_NAMESIZE]; 5342 char label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE]; 5343 char tagname[PF_TAG_NAME_SIZE]; 5344 char match_tagname[PF_TAG_NAME_SIZE]; 5345 struct pf_pooladdr *pa; 5346 struct node_host *h; 5347 u_int8_t flags, flagset, keep_state; 5348 5349 memcpy(label, r->label, sizeof(r->label)); 5350 assert(sizeof(r->label) == sizeof(label)); 5351 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 5352 errx(1, "expand_rule: strlcpy"); 5353 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 5354 sizeof(match_tagname)) 5355 errx(1, "expand_rule: strlcpy"); 5356 flags = r->flags; 5357 flagset = r->flagset; 5358 keep_state = r->keep_state; 5359 5360 LOOP_THROUGH(struct node_if, interface, interfaces, 5361 LOOP_THROUGH(struct node_proto, proto, protos, 5362 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 5363 LOOP_THROUGH(struct node_host, src_host, src_hosts, 5364 LOOP_THROUGH(struct node_port, src_port, src_ports, 5365 LOOP_THROUGH(struct node_os, src_os, src_oses, 5366 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 5367 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 5368 LOOP_THROUGH(struct node_uid, uid, uids, 5369 LOOP_THROUGH(struct node_gid, gid, gids, 5370 5371 r->af = af; 5372 /* for link-local IPv6 address, interface must match up */ 5373 if ((r->af && src_host->af && r->af != src_host->af) || 5374 (r->af && dst_host->af && r->af != dst_host->af) || 5375 (src_host->af && dst_host->af && 5376 src_host->af != dst_host->af) || 5377 (src_host->ifindex && dst_host->ifindex && 5378 src_host->ifindex != dst_host->ifindex) || 5379 (src_host->ifindex && *interface->ifname && 5380 src_host->ifindex != if_nametoindex(interface->ifname)) || 5381 (dst_host->ifindex && *interface->ifname && 5382 dst_host->ifindex != if_nametoindex(interface->ifname))) 5383 continue; 5384 if (!r->af && src_host->af) 5385 r->af = src_host->af; 5386 else if (!r->af && dst_host->af) 5387 r->af = dst_host->af; 5388 5389 if (*interface->ifname) 5390 strlcpy(r->ifname, interface->ifname, 5391 sizeof(r->ifname)); 5392 else if (if_indextoname(src_host->ifindex, ifname)) 5393 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 5394 else if (if_indextoname(dst_host->ifindex, ifname)) 5395 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 5396 else 5397 memset(r->ifname, '\0', sizeof(r->ifname)); 5398 5399 memcpy(r->label, label, sizeof(r->label)); 5400 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 5401 sizeof(r->tagname)) 5402 errx(1, "expand_rule: strlcpy"); 5403 if (strlcpy(r->match_tagname, match_tagname, 5404 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 5405 errx(1, "expand_rule: strlcpy"); 5406 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 5407 expand_label(r->label[i], PF_RULE_LABEL_SIZE, 5408 r->ifname, r->af, src_host, src_port, dst_host, 5409 dst_port, proto->proto); 5410 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af, 5411 src_host, src_port, dst_host, dst_port, proto->proto); 5412 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname, 5413 r->af, src_host, src_port, dst_host, dst_port, 5414 proto->proto); 5415 5416 error += check_netmask(src_host, r->af); 5417 error += check_netmask(dst_host, r->af); 5418 5419 r->ifnot = interface->not; 5420 r->proto = proto->proto; 5421 r->src.addr = src_host->addr; 5422 r->src.neg = src_host->not; 5423 r->src.port[0] = src_port->port[0]; 5424 r->src.port[1] = src_port->port[1]; 5425 r->src.port_op = src_port->op; 5426 r->dst.addr = dst_host->addr; 5427 r->dst.neg = dst_host->not; 5428 r->dst.port[0] = dst_port->port[0]; 5429 r->dst.port[1] = dst_port->port[1]; 5430 r->dst.port_op = dst_port->op; 5431 r->uid.op = uid->op; 5432 r->uid.uid[0] = uid->uid[0]; 5433 r->uid.uid[1] = uid->uid[1]; 5434 r->gid.op = gid->op; 5435 r->gid.gid[0] = gid->gid[0]; 5436 r->gid.gid[1] = gid->gid[1]; 5437 r->type = icmp_type->type; 5438 r->code = icmp_type->code; 5439 5440 if ((keep_state == PF_STATE_MODULATE || 5441 keep_state == PF_STATE_SYNPROXY) && 5442 r->proto && r->proto != IPPROTO_TCP) 5443 r->keep_state = PF_STATE_NORMAL; 5444 else 5445 r->keep_state = keep_state; 5446 5447 if (r->proto && r->proto != IPPROTO_TCP) { 5448 r->flags = 0; 5449 r->flagset = 0; 5450 } else { 5451 r->flags = flags; 5452 r->flagset = flagset; 5453 } 5454 if (icmp_type->proto && r->proto != icmp_type->proto) { 5455 yyerror("icmp-type mismatch"); 5456 error++; 5457 } 5458 5459 if (src_os && src_os->os) { 5460 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 5461 if ((pf->opts & PF_OPT_VERBOSE2) && 5462 r->os_fingerprint == PF_OSFP_NOMATCH) 5463 fprintf(stderr, 5464 "warning: unknown '%s' OS fingerprint\n", 5465 src_os->os); 5466 } else { 5467 r->os_fingerprint = PF_OSFP_ANY; 5468 } 5469 5470 TAILQ_INIT(&r->rpool.list); 5471 for (h = rpool_hosts; h != NULL; h = h->next) { 5472 pa = calloc(1, sizeof(struct pf_pooladdr)); 5473 if (pa == NULL) 5474 err(1, "expand_rule: calloc"); 5475 pa->addr = h->addr; 5476 if (h->ifname != NULL) { 5477 if (strlcpy(pa->ifname, h->ifname, 5478 sizeof(pa->ifname)) >= 5479 sizeof(pa->ifname)) 5480 errx(1, "expand_rule: strlcpy"); 5481 } else 5482 pa->ifname[0] = 0; 5483 TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries); 5484 } 5485 5486 if (rule_consistent(r, anchor_call[0]) < 0 || error) 5487 yyerror("skipping rule due to errors"); 5488 else { 5489 r->nr = pf->astack[pf->asd]->match++; 5490 pfctl_append_rule(pf, r, anchor_call); 5491 added++; 5492 } 5493 5494 )))))))))); 5495 5496 FREE_LIST(struct node_if, interfaces); 5497 FREE_LIST(struct node_proto, protos); 5498 FREE_LIST(struct node_host, src_hosts); 5499 FREE_LIST(struct node_port, src_ports); 5500 FREE_LIST(struct node_os, src_oses); 5501 FREE_LIST(struct node_host, dst_hosts); 5502 FREE_LIST(struct node_port, dst_ports); 5503 FREE_LIST(struct node_uid, uids); 5504 FREE_LIST(struct node_gid, gids); 5505 FREE_LIST(struct node_icmp, icmp_types); 5506 FREE_LIST(struct node_host, rpool_hosts); 5507 5508 if (!added) 5509 yyerror("rule expands to no valid combination"); 5510 } 5511 5512 int 5513 expand_skip_interface(struct node_if *interfaces) 5514 { 5515 int errs = 0; 5516 5517 if (!interfaces || (!interfaces->next && !interfaces->not && 5518 !strcmp(interfaces->ifname, "none"))) { 5519 if (pf->opts & PF_OPT_VERBOSE) 5520 printf("set skip on none\n"); 5521 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0); 5522 return (errs); 5523 } 5524 5525 if (pf->opts & PF_OPT_VERBOSE) 5526 printf("set skip on {"); 5527 LOOP_THROUGH(struct node_if, interface, interfaces, 5528 if (pf->opts & PF_OPT_VERBOSE) 5529 printf(" %s", interface->ifname); 5530 if (interface->not) { 5531 yyerror("skip on ! <interface> is not supported"); 5532 errs++; 5533 } else 5534 errs += pfctl_set_interface_flags(pf, 5535 interface->ifname, PFI_IFLAG_SKIP, 1); 5536 ); 5537 if (pf->opts & PF_OPT_VERBOSE) 5538 printf(" }\n"); 5539 5540 FREE_LIST(struct node_if, interfaces); 5541 5542 if (errs) 5543 return (1); 5544 else 5545 return (0); 5546 } 5547 5548 #undef FREE_LIST 5549 #undef LOOP_THROUGH 5550 5551 int 5552 check_rulestate(int desired_state) 5553 { 5554 if (require_order && (rulestate > desired_state)) { 5555 yyerror("Rules must be in order: options, normalization, " 5556 "queueing, translation, filtering"); 5557 return (1); 5558 } 5559 rulestate = desired_state; 5560 return (0); 5561 } 5562 5563 int 5564 kw_cmp(const void *k, const void *e) 5565 { 5566 return (strcmp(k, ((const struct keywords *)e)->k_name)); 5567 } 5568 5569 int 5570 lookup(char *s) 5571 { 5572 /* this has to be sorted always */ 5573 static const struct keywords keywords[] = { 5574 { "all", ALL}, 5575 { "allow-opts", ALLOWOPTS}, 5576 { "altq", ALTQ}, 5577 { "anchor", ANCHOR}, 5578 { "antispoof", ANTISPOOF}, 5579 { "any", ANY}, 5580 { "bandwidth", BANDWIDTH}, 5581 { "binat", BINAT}, 5582 { "binat-anchor", BINATANCHOR}, 5583 { "bitmask", BITMASK}, 5584 { "block", BLOCK}, 5585 { "block-policy", BLOCKPOLICY}, 5586 { "buckets", BUCKETS}, 5587 { "cbq", CBQ}, 5588 { "code", CODE}, 5589 { "codelq", CODEL}, 5590 { "crop", FRAGCROP}, 5591 { "debug", DEBUG}, 5592 { "divert-reply", DIVERTREPLY}, 5593 { "divert-to", DIVERTTO}, 5594 { "drop", DROP}, 5595 { "drop-ovl", FRAGDROP}, 5596 { "dup-to", DUPTO}, 5597 { "fail-policy", FAILPOLICY}, 5598 { "fairq", FAIRQ}, 5599 { "fastroute", FASTROUTE}, 5600 { "file", FILENAME}, 5601 { "fingerprints", FINGERPRINTS}, 5602 { "flags", FLAGS}, 5603 { "floating", FLOATING}, 5604 { "flush", FLUSH}, 5605 { "for", FOR}, 5606 { "fragment", FRAGMENT}, 5607 { "from", FROM}, 5608 { "global", GLOBAL}, 5609 { "group", GROUP}, 5610 { "hfsc", HFSC}, 5611 { "hogs", HOGS}, 5612 { "hostid", HOSTID}, 5613 { "icmp-type", ICMPTYPE}, 5614 { "icmp6-type", ICMP6TYPE}, 5615 { "if-bound", IFBOUND}, 5616 { "in", IN}, 5617 { "include", INCLUDE}, 5618 { "inet", INET}, 5619 { "inet6", INET6}, 5620 { "interval", INTERVAL}, 5621 { "keep", KEEP}, 5622 { "keepcounters", KEEPCOUNTERS}, 5623 { "label", LABEL}, 5624 { "limit", LIMIT}, 5625 { "linkshare", LINKSHARE}, 5626 { "load", LOAD}, 5627 { "log", LOG}, 5628 { "loginterface", LOGINTERFACE}, 5629 { "map-e-portset", MAPEPORTSET}, 5630 { "max", MAXIMUM}, 5631 { "max-mss", MAXMSS}, 5632 { "max-src-conn", MAXSRCCONN}, 5633 { "max-src-conn-rate", MAXSRCCONNRATE}, 5634 { "max-src-nodes", MAXSRCNODES}, 5635 { "max-src-states", MAXSRCSTATES}, 5636 { "min-ttl", MINTTL}, 5637 { "modulate", MODULATE}, 5638 { "nat", NAT}, 5639 { "nat-anchor", NATANCHOR}, 5640 { "no", NO}, 5641 { "no-df", NODF}, 5642 { "no-route", NOROUTE}, 5643 { "no-sync", NOSYNC}, 5644 { "on", ON}, 5645 { "optimization", OPTIMIZATION}, 5646 { "os", OS}, 5647 { "out", OUT}, 5648 { "overload", OVERLOAD}, 5649 { "pass", PASS}, 5650 { "port", PORT}, 5651 { "prio", PRIO}, 5652 { "priority", PRIORITY}, 5653 { "priq", PRIQ}, 5654 { "probability", PROBABILITY}, 5655 { "proto", PROTO}, 5656 { "qlimit", QLIMIT}, 5657 { "queue", QUEUE}, 5658 { "quick", QUICK}, 5659 { "random", RANDOM}, 5660 { "random-id", RANDOMID}, 5661 { "rdr", RDR}, 5662 { "rdr-anchor", RDRANCHOR}, 5663 { "realtime", REALTIME}, 5664 { "reassemble", REASSEMBLE}, 5665 { "reply-to", REPLYTO}, 5666 { "require-order", REQUIREORDER}, 5667 { "return", RETURN}, 5668 { "return-icmp", RETURNICMP}, 5669 { "return-icmp6", RETURNICMP6}, 5670 { "return-rst", RETURNRST}, 5671 { "round-robin", ROUNDROBIN}, 5672 { "route", ROUTE}, 5673 { "route-to", ROUTETO}, 5674 { "rtable", RTABLE}, 5675 { "rule", RULE}, 5676 { "ruleset-optimization", RULESET_OPTIMIZATION}, 5677 { "scrub", SCRUB}, 5678 { "set", SET}, 5679 { "set-tos", SETTOS}, 5680 { "skip", SKIP}, 5681 { "sloppy", SLOPPY}, 5682 { "source-hash", SOURCEHASH}, 5683 { "source-track", SOURCETRACK}, 5684 { "state", STATE}, 5685 { "state-defaults", STATEDEFAULTS}, 5686 { "state-policy", STATEPOLICY}, 5687 { "static-port", STATICPORT}, 5688 { "sticky-address", STICKYADDRESS}, 5689 { "syncookies", SYNCOOKIES}, 5690 { "synproxy", SYNPROXY}, 5691 { "table", TABLE}, 5692 { "tag", TAG}, 5693 { "tagged", TAGGED}, 5694 { "target", TARGET}, 5695 { "tbrsize", TBRSIZE}, 5696 { "timeout", TIMEOUT}, 5697 { "to", TO}, 5698 { "tos", TOS}, 5699 { "ttl", TTL}, 5700 { "upperlimit", UPPERLIMIT}, 5701 { "urpf-failed", URPFFAILED}, 5702 { "user", USER}, 5703 }; 5704 const struct keywords *p; 5705 5706 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 5707 sizeof(keywords[0]), kw_cmp); 5708 5709 if (p) { 5710 if (debug > 1) 5711 fprintf(stderr, "%s: %d\n", s, p->k_val); 5712 return (p->k_val); 5713 } else { 5714 if (debug > 1) 5715 fprintf(stderr, "string: %s\n", s); 5716 return (STRING); 5717 } 5718 } 5719 5720 #define MAXPUSHBACK 128 5721 5722 static char *parsebuf; 5723 static int parseindex; 5724 static char pushback_buffer[MAXPUSHBACK]; 5725 static int pushback_index = 0; 5726 5727 int 5728 lgetc(int quotec) 5729 { 5730 int c, next; 5731 5732 if (parsebuf) { 5733 /* Read character from the parsebuffer instead of input. */ 5734 if (parseindex >= 0) { 5735 c = parsebuf[parseindex++]; 5736 if (c != '\0') 5737 return (c); 5738 parsebuf = NULL; 5739 } else 5740 parseindex++; 5741 } 5742 5743 if (pushback_index) 5744 return (pushback_buffer[--pushback_index]); 5745 5746 if (quotec) { 5747 if ((c = getc(file->stream)) == EOF) { 5748 yyerror("reached end of file while parsing quoted string"); 5749 if (popfile() == EOF) 5750 return (EOF); 5751 return (quotec); 5752 } 5753 return (c); 5754 } 5755 5756 while ((c = getc(file->stream)) == '\\') { 5757 next = getc(file->stream); 5758 if (next != '\n') { 5759 c = next; 5760 break; 5761 } 5762 yylval.lineno = file->lineno; 5763 file->lineno++; 5764 } 5765 5766 while (c == EOF) { 5767 if (popfile() == EOF) 5768 return (EOF); 5769 c = getc(file->stream); 5770 } 5771 return (c); 5772 } 5773 5774 int 5775 lungetc(int c) 5776 { 5777 if (c == EOF) 5778 return (EOF); 5779 if (parsebuf) { 5780 parseindex--; 5781 if (parseindex >= 0) 5782 return (c); 5783 } 5784 if (pushback_index < MAXPUSHBACK-1) 5785 return (pushback_buffer[pushback_index++] = c); 5786 else 5787 return (EOF); 5788 } 5789 5790 int 5791 findeol(void) 5792 { 5793 int c; 5794 5795 parsebuf = NULL; 5796 5797 /* skip to either EOF or the first real EOL */ 5798 while (1) { 5799 if (pushback_index) 5800 c = pushback_buffer[--pushback_index]; 5801 else 5802 c = lgetc(0); 5803 if (c == '\n') { 5804 file->lineno++; 5805 break; 5806 } 5807 if (c == EOF) 5808 break; 5809 } 5810 return (ERROR); 5811 } 5812 5813 int 5814 yylex(void) 5815 { 5816 char buf[8096]; 5817 char *p, *val; 5818 int quotec, next, c; 5819 int token; 5820 5821 top: 5822 p = buf; 5823 while ((c = lgetc(0)) == ' ' || c == '\t') 5824 ; /* nothing */ 5825 5826 yylval.lineno = file->lineno; 5827 if (c == '#') 5828 while ((c = lgetc(0)) != '\n' && c != EOF) 5829 ; /* nothing */ 5830 if (c == '$' && parsebuf == NULL) { 5831 while (1) { 5832 if ((c = lgetc(0)) == EOF) 5833 return (0); 5834 5835 if (p + 1 >= buf + sizeof(buf) - 1) { 5836 yyerror("string too long"); 5837 return (findeol()); 5838 } 5839 if (isalnum(c) || c == '_') { 5840 *p++ = (char)c; 5841 continue; 5842 } 5843 *p = '\0'; 5844 lungetc(c); 5845 break; 5846 } 5847 val = symget(buf); 5848 if (val == NULL) { 5849 yyerror("macro '%s' not defined", buf); 5850 return (findeol()); 5851 } 5852 parsebuf = val; 5853 parseindex = 0; 5854 goto top; 5855 } 5856 5857 switch (c) { 5858 case '\'': 5859 case '"': 5860 quotec = c; 5861 while (1) { 5862 if ((c = lgetc(quotec)) == EOF) 5863 return (0); 5864 if (c == '\n') { 5865 file->lineno++; 5866 continue; 5867 } else if (c == '\\') { 5868 if ((next = lgetc(quotec)) == EOF) 5869 return (0); 5870 if (next == quotec || c == ' ' || c == '\t') 5871 c = next; 5872 else if (next == '\n') { 5873 file->lineno++; 5874 continue; 5875 } 5876 else 5877 lungetc(next); 5878 } else if (c == quotec) { 5879 *p = '\0'; 5880 break; 5881 } 5882 if (p + 1 >= buf + sizeof(buf) - 1) { 5883 yyerror("string too long"); 5884 return (findeol()); 5885 } 5886 *p++ = (char)c; 5887 } 5888 yylval.v.string = strdup(buf); 5889 if (yylval.v.string == NULL) 5890 err(1, "yylex: strdup"); 5891 return (STRING); 5892 case '<': 5893 next = lgetc(0); 5894 if (next == '>') { 5895 yylval.v.i = PF_OP_XRG; 5896 return (PORTBINARY); 5897 } 5898 lungetc(next); 5899 break; 5900 case '>': 5901 next = lgetc(0); 5902 if (next == '<') { 5903 yylval.v.i = PF_OP_IRG; 5904 return (PORTBINARY); 5905 } 5906 lungetc(next); 5907 break; 5908 case '-': 5909 next = lgetc(0); 5910 if (next == '>') 5911 return (ARROW); 5912 lungetc(next); 5913 break; 5914 } 5915 5916 #define allowed_to_end_number(x) \ 5917 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 5918 5919 if (c == '-' || isdigit(c)) { 5920 do { 5921 *p++ = c; 5922 if ((unsigned)(p-buf) >= sizeof(buf)) { 5923 yyerror("string too long"); 5924 return (findeol()); 5925 } 5926 } while ((c = lgetc(0)) != EOF && isdigit(c)); 5927 lungetc(c); 5928 if (p == buf + 1 && buf[0] == '-') 5929 goto nodigits; 5930 if (c == EOF || allowed_to_end_number(c)) { 5931 const char *errstr = NULL; 5932 5933 *p = '\0'; 5934 yylval.v.number = strtonum(buf, LLONG_MIN, 5935 LLONG_MAX, &errstr); 5936 if (errstr) { 5937 yyerror("\"%s\" invalid number: %s", 5938 buf, errstr); 5939 return (findeol()); 5940 } 5941 return (NUMBER); 5942 } else { 5943 nodigits: 5944 while (p > buf + 1) 5945 lungetc(*--p); 5946 c = *--p; 5947 if (c == '-') 5948 return (c); 5949 } 5950 } 5951 5952 #define allowed_in_string(x) \ 5953 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 5954 x != '{' && x != '}' && x != '<' && x != '>' && \ 5955 x != '!' && x != '=' && x != '/' && x != '#' && \ 5956 x != ',')) 5957 5958 if (isalnum(c) || c == ':' || c == '_') { 5959 do { 5960 *p++ = c; 5961 if ((unsigned)(p-buf) >= sizeof(buf)) { 5962 yyerror("string too long"); 5963 return (findeol()); 5964 } 5965 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 5966 lungetc(c); 5967 *p = '\0'; 5968 if ((token = lookup(buf)) == STRING) 5969 if ((yylval.v.string = strdup(buf)) == NULL) 5970 err(1, "yylex: strdup"); 5971 return (token); 5972 } 5973 if (c == '\n') { 5974 yylval.lineno = file->lineno; 5975 file->lineno++; 5976 } 5977 if (c == EOF) 5978 return (0); 5979 return (c); 5980 } 5981 5982 int 5983 check_file_secrecy(int fd, const char *fname) 5984 { 5985 struct stat st; 5986 5987 if (fstat(fd, &st)) { 5988 warn("cannot stat %s", fname); 5989 return (-1); 5990 } 5991 if (st.st_uid != 0 && st.st_uid != getuid()) { 5992 warnx("%s: owner not root or current user", fname); 5993 return (-1); 5994 } 5995 if (st.st_mode & (S_IRWXG | S_IRWXO)) { 5996 warnx("%s: group/world readable/writeable", fname); 5997 return (-1); 5998 } 5999 return (0); 6000 } 6001 6002 struct file * 6003 pushfile(const char *name, int secret) 6004 { 6005 struct file *nfile; 6006 6007 if ((nfile = calloc(1, sizeof(struct file))) == NULL || 6008 (nfile->name = strdup(name)) == NULL) { 6009 warn("malloc"); 6010 return (NULL); 6011 } 6012 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 6013 nfile->stream = stdin; 6014 free(nfile->name); 6015 if ((nfile->name = strdup("stdin")) == NULL) { 6016 warn("strdup"); 6017 free(nfile); 6018 return (NULL); 6019 } 6020 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 6021 warn("%s", nfile->name); 6022 free(nfile->name); 6023 free(nfile); 6024 return (NULL); 6025 } else if (secret && 6026 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 6027 fclose(nfile->stream); 6028 free(nfile->name); 6029 free(nfile); 6030 return (NULL); 6031 } 6032 nfile->lineno = 1; 6033 TAILQ_INSERT_TAIL(&files, nfile, entry); 6034 return (nfile); 6035 } 6036 6037 int 6038 popfile(void) 6039 { 6040 struct file *prev; 6041 6042 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 6043 prev->errors += file->errors; 6044 TAILQ_REMOVE(&files, file, entry); 6045 fclose(file->stream); 6046 free(file->name); 6047 free(file); 6048 file = prev; 6049 return (0); 6050 } 6051 return (EOF); 6052 } 6053 6054 int 6055 parse_config(char *filename, struct pfctl *xpf) 6056 { 6057 int errors = 0; 6058 struct sym *sym; 6059 6060 pf = xpf; 6061 errors = 0; 6062 rulestate = PFCTL_STATE_NONE; 6063 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 6064 returnicmp6default = 6065 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 6066 blockpolicy = PFRULE_DROP; 6067 failpolicy = PFRULE_DROP; 6068 require_order = 1; 6069 6070 if ((file = pushfile(filename, 0)) == NULL) { 6071 warn("cannot open the main config file!"); 6072 return (-1); 6073 } 6074 6075 yyparse(); 6076 errors = file->errors; 6077 popfile(); 6078 6079 /* Free macros and check which have not been used. */ 6080 while ((sym = TAILQ_FIRST(&symhead))) { 6081 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 6082 fprintf(stderr, "warning: macro '%s' not " 6083 "used\n", sym->nam); 6084 free(sym->nam); 6085 free(sym->val); 6086 TAILQ_REMOVE(&symhead, sym, entry); 6087 free(sym); 6088 } 6089 6090 return (errors ? -1 : 0); 6091 } 6092 6093 int 6094 symset(const char *nam, const char *val, int persist) 6095 { 6096 struct sym *sym; 6097 6098 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 6099 sym = TAILQ_NEXT(sym, entry)) 6100 ; /* nothing */ 6101 6102 if (sym != NULL) { 6103 if (sym->persist == 1) 6104 return (0); 6105 else { 6106 free(sym->nam); 6107 free(sym->val); 6108 TAILQ_REMOVE(&symhead, sym, entry); 6109 free(sym); 6110 } 6111 } 6112 if ((sym = calloc(1, sizeof(*sym))) == NULL) 6113 return (-1); 6114 6115 sym->nam = strdup(nam); 6116 if (sym->nam == NULL) { 6117 free(sym); 6118 return (-1); 6119 } 6120 sym->val = strdup(val); 6121 if (sym->val == NULL) { 6122 free(sym->nam); 6123 free(sym); 6124 return (-1); 6125 } 6126 sym->used = 0; 6127 sym->persist = persist; 6128 TAILQ_INSERT_TAIL(&symhead, sym, entry); 6129 return (0); 6130 } 6131 6132 int 6133 pfctl_cmdline_symset(char *s) 6134 { 6135 char *sym, *val; 6136 int ret; 6137 6138 if ((val = strrchr(s, '=')) == NULL) 6139 return (-1); 6140 6141 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL) 6142 err(1, "pfctl_cmdline_symset: malloc"); 6143 6144 strlcpy(sym, s, strlen(s) - strlen(val) + 1); 6145 6146 ret = symset(sym, val + 1, 1); 6147 free(sym); 6148 6149 return (ret); 6150 } 6151 6152 char * 6153 symget(const char *nam) 6154 { 6155 struct sym *sym; 6156 6157 TAILQ_FOREACH(sym, &symhead, entry) 6158 if (strcmp(nam, sym->nam) == 0) { 6159 sym->used = 1; 6160 return (sym->val); 6161 } 6162 return (NULL); 6163 } 6164 6165 void 6166 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst) 6167 { 6168 int i; 6169 struct pfctl_rule *r; 6170 6171 for (i = 0; i < PF_RULESET_MAX; ++i) { 6172 while ((r = TAILQ_FIRST(src->rules[i].active.ptr)) 6173 != NULL) { 6174 TAILQ_REMOVE(src->rules[i].active.ptr, r, entries); 6175 TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries); 6176 dst->anchor->match++; 6177 } 6178 src->anchor->match = 0; 6179 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr)) 6180 != NULL) { 6181 TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries); 6182 TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr, 6183 r, entries); 6184 } 6185 } 6186 } 6187 6188 void 6189 decide_address_family(struct node_host *n, sa_family_t *af) 6190 { 6191 if (*af != 0 || n == NULL) 6192 return; 6193 *af = n->af; 6194 while ((n = n->next) != NULL) { 6195 if (n->af != *af) { 6196 *af = 0; 6197 return; 6198 } 6199 } 6200 } 6201 6202 void 6203 remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 6204 { 6205 struct node_host *n = *nh, *prev = NULL; 6206 6207 while (n != NULL) { 6208 if (*af && n->af && n->af != *af) { 6209 /* unlink and free n */ 6210 struct node_host *next = n->next; 6211 6212 /* adjust tail pointer */ 6213 if (n == (*nh)->tail) 6214 (*nh)->tail = prev; 6215 /* adjust previous node's next pointer */ 6216 if (prev == NULL) 6217 *nh = next; 6218 else 6219 prev->next = next; 6220 /* free node */ 6221 if (n->ifname != NULL) 6222 free(n->ifname); 6223 free(n); 6224 n = next; 6225 } else { 6226 if (n->af && !*af) 6227 *af = n->af; 6228 prev = n; 6229 n = n->next; 6230 } 6231 } 6232 } 6233 6234 int 6235 invalid_redirect(struct node_host *nh, sa_family_t af) 6236 { 6237 if (!af) { 6238 struct node_host *n; 6239 6240 /* tables and dyniftl are ok without an address family */ 6241 for (n = nh; n != NULL; n = n->next) { 6242 if (n->addr.type != PF_ADDR_TABLE && 6243 n->addr.type != PF_ADDR_DYNIFTL) { 6244 yyerror("address family not given and " 6245 "translation address expands to multiple " 6246 "address families"); 6247 return (1); 6248 } 6249 } 6250 } 6251 if (nh == NULL) { 6252 yyerror("no translation address with matching address family " 6253 "found."); 6254 return (1); 6255 } 6256 return (0); 6257 } 6258 6259 int 6260 atoul(char *s, u_long *ulvalp) 6261 { 6262 u_long ulval; 6263 char *ep; 6264 6265 errno = 0; 6266 ulval = strtoul(s, &ep, 0); 6267 if (s[0] == '\0' || *ep != '\0') 6268 return (-1); 6269 if (errno == ERANGE && ulval == ULONG_MAX) 6270 return (-1); 6271 *ulvalp = ulval; 6272 return (0); 6273 } 6274 6275 int 6276 getservice(char *n) 6277 { 6278 struct servent *s; 6279 u_long ulval; 6280 6281 if (atoul(n, &ulval) == 0) { 6282 if (ulval > 65535) { 6283 yyerror("illegal port value %lu", ulval); 6284 return (-1); 6285 } 6286 return (htons(ulval)); 6287 } else { 6288 s = getservbyname(n, "tcp"); 6289 if (s == NULL) 6290 s = getservbyname(n, "udp"); 6291 if (s == NULL) { 6292 yyerror("unknown port %s", n); 6293 return (-1); 6294 } 6295 return (s->s_port); 6296 } 6297 } 6298 6299 int 6300 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 6301 { 6302 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 6303 if (s[i] == NULL) 6304 return (0); 6305 6306 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 6307 sizeof(r->label[0])) { 6308 yyerror("rule label too long (max %d chars)", 6309 sizeof(r->label[0])-1); 6310 return (-1); 6311 } 6312 } 6313 return (0); 6314 } 6315 6316 u_int16_t 6317 parseicmpspec(char *w, sa_family_t af) 6318 { 6319 const struct icmpcodeent *p; 6320 u_long ulval; 6321 u_int8_t icmptype; 6322 6323 if (af == AF_INET) 6324 icmptype = returnicmpdefault >> 8; 6325 else 6326 icmptype = returnicmp6default >> 8; 6327 6328 if (atoul(w, &ulval) == -1) { 6329 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 6330 yyerror("unknown icmp code %s", w); 6331 return (0); 6332 } 6333 ulval = p->code; 6334 } 6335 if (ulval > 255) { 6336 yyerror("invalid icmp code %lu", ulval); 6337 return (0); 6338 } 6339 return (icmptype << 8 | ulval); 6340 } 6341 6342 int 6343 parseport(char *port, struct range *r, int extensions) 6344 { 6345 char *p = strchr(port, ':'); 6346 6347 if (p == NULL) { 6348 if ((r->a = getservice(port)) == -1) 6349 return (-1); 6350 r->b = 0; 6351 r->t = PF_OP_NONE; 6352 return (0); 6353 } 6354 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) { 6355 *p = 0; 6356 if ((r->a = getservice(port)) == -1) 6357 return (-1); 6358 r->b = 0; 6359 r->t = PF_OP_IRG; 6360 return (0); 6361 } 6362 if ((extensions & PPORT_RANGE)) { 6363 *p++ = 0; 6364 if ((r->a = getservice(port)) == -1 || 6365 (r->b = getservice(p)) == -1) 6366 return (-1); 6367 if (r->a == r->b) { 6368 r->b = 0; 6369 r->t = PF_OP_NONE; 6370 } else 6371 r->t = PF_OP_RRG; 6372 return (0); 6373 } 6374 return (-1); 6375 } 6376 6377 int 6378 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans) 6379 { 6380 struct loadanchors *la; 6381 6382 TAILQ_FOREACH(la, &loadanchorshead, entries) { 6383 if (pf->opts & PF_OPT_VERBOSE) 6384 fprintf(stderr, "\nLoading anchor %s from %s\n", 6385 la->anchorname, la->filename); 6386 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize, 6387 la->anchorname, trans) == -1) 6388 return (-1); 6389 } 6390 6391 return (0); 6392 } 6393 6394 int 6395 kw_casecmp(const void *k, const void *e) 6396 { 6397 return (strcasecmp(k, ((const struct keywords *)e)->k_name)); 6398 } 6399 6400 int 6401 map_tos(char *s, int *val) 6402 { 6403 /* DiffServ Codepoints and other TOS mappings */ 6404 const struct keywords toswords[] = { 6405 { "af11", IPTOS_DSCP_AF11 }, 6406 { "af12", IPTOS_DSCP_AF12 }, 6407 { "af13", IPTOS_DSCP_AF13 }, 6408 { "af21", IPTOS_DSCP_AF21 }, 6409 { "af22", IPTOS_DSCP_AF22 }, 6410 { "af23", IPTOS_DSCP_AF23 }, 6411 { "af31", IPTOS_DSCP_AF31 }, 6412 { "af32", IPTOS_DSCP_AF32 }, 6413 { "af33", IPTOS_DSCP_AF33 }, 6414 { "af41", IPTOS_DSCP_AF41 }, 6415 { "af42", IPTOS_DSCP_AF42 }, 6416 { "af43", IPTOS_DSCP_AF43 }, 6417 { "critical", IPTOS_PREC_CRITIC_ECP }, 6418 { "cs0", IPTOS_DSCP_CS0 }, 6419 { "cs1", IPTOS_DSCP_CS1 }, 6420 { "cs2", IPTOS_DSCP_CS2 }, 6421 { "cs3", IPTOS_DSCP_CS3 }, 6422 { "cs4", IPTOS_DSCP_CS4 }, 6423 { "cs5", IPTOS_DSCP_CS5 }, 6424 { "cs6", IPTOS_DSCP_CS6 }, 6425 { "cs7", IPTOS_DSCP_CS7 }, 6426 { "ef", IPTOS_DSCP_EF }, 6427 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL }, 6428 { "lowdelay", IPTOS_LOWDELAY }, 6429 { "netcontrol", IPTOS_PREC_NETCONTROL }, 6430 { "reliability", IPTOS_RELIABILITY }, 6431 { "throughput", IPTOS_THROUGHPUT }, 6432 { "va", IPTOS_DSCP_VA } 6433 }; 6434 const struct keywords *p; 6435 6436 p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]), 6437 sizeof(toswords[0]), kw_casecmp); 6438 6439 if (p) { 6440 *val = p->k_val; 6441 return (1); 6442 } 6443 return (0); 6444 } 6445 6446 int 6447 rt_tableid_max(void) 6448 { 6449 #ifdef __FreeBSD__ 6450 int fibs; 6451 size_t l = sizeof(fibs); 6452 6453 if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1) 6454 fibs = 16; /* XXX RT_MAXFIBS, at least limit it some. */ 6455 /* 6456 * As the OpenBSD code only compares > and not >= we need to adjust 6457 * here given we only accept values of 0..n and want to avoid #ifdefs 6458 * in the grammar. 6459 */ 6460 return (fibs - 1); 6461 #else 6462 return (RT_TABLEID_MAX); 6463 #endif 6464 } 6465