1 /* $OpenBSD: parse.y,v 1.549 2008/07/03 16:09:34 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Markus Friedl. All rights reserved. 5 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved. 6 * Copyright (c) 2001 Theo de Raadt. All rights reserved. 7 * Copyright (c) 2002,2003 Henning Brauer. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 %{ 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 #include <sys/stat.h> 33 #include <net/if.h> 34 #include <netinet/in.h> 35 #include <netinet/in_systm.h> 36 #include <netinet/ip.h> 37 #include <netinet/ip_icmp.h> 38 #include <netinet/icmp6.h> 39 #include <net/pf/pfvar.h> 40 #include <arpa/inet.h> 41 #include <net/altq/altq.h> 42 #include <net/altq/altq_cbq.h> 43 #include <net/altq/altq_priq.h> 44 #include <net/altq/altq_hfsc.h> 45 #include <net/altq/altq_fairq.h> 46 47 #include <stdio.h> 48 #include <unistd.h> 49 #include <stdlib.h> 50 #include <netdb.h> 51 #include <stdarg.h> 52 #include <errno.h> 53 #include <string.h> 54 #include <ctype.h> 55 #include <math.h> 56 #include <err.h> 57 #include <limits.h> 58 #include <pwd.h> 59 #include <grp.h> 60 #include <md5.h> 61 #include <inttypes.h> 62 63 #include "pfctl_parser.h" 64 #include "pfctl.h" 65 66 static struct pfctl *pf = NULL; 67 static int debug = 0; 68 static int rulestate = 0; 69 static u_int16_t returnicmpdefault = 70 (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 71 static u_int16_t returnicmp6default = 72 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 73 static int blockpolicy = PFRULE_DROP; 74 static int require_order = 1; 75 static int default_statelock; 76 static int default_keeppolicy_action; 77 static struct node_state_opt *default_keeppolicy_options; 78 79 TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files); 80 static struct file { 81 TAILQ_ENTRY(file) entry; 82 FILE *stream; 83 char *name; 84 int lineno; 85 int errors; 86 } *file; 87 struct file *pushfile(const char *, int); 88 int popfile(void); 89 int check_file_secrecy(int, const char *); 90 int yylex(void); 91 int yyerror(const char *, ...) __printflike(1, 2); 92 int kw_cmp(const void *, const void *); 93 int lookup(char *); 94 int lgetc(int); 95 int lungetc(int); 96 int findeol(void); 97 98 TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 99 struct sym { 100 TAILQ_ENTRY(sym) entry; 101 int used; 102 int persist; 103 char *nam; 104 char *val; 105 }; 106 int symset(const char *, const char *, int); 107 char *symget(const char *); 108 109 int atoul(char *, u_long *); 110 111 enum { 112 PFCTL_STATE_NONE, 113 PFCTL_STATE_OPTION, 114 PFCTL_STATE_SCRUB, 115 PFCTL_STATE_QUEUE, 116 PFCTL_STATE_NAT, 117 PFCTL_STATE_FILTER 118 }; 119 120 struct node_proto { 121 u_int8_t proto; 122 struct node_proto *next; 123 struct node_proto *tail; 124 }; 125 126 struct node_port { 127 u_int16_t port[2]; 128 u_int8_t op; 129 struct node_port *next; 130 struct node_port *tail; 131 }; 132 133 struct node_uid { 134 uid_t uid[2]; 135 u_int8_t op; 136 struct node_uid *next; 137 struct node_uid *tail; 138 }; 139 140 struct node_gid { 141 gid_t gid[2]; 142 u_int8_t op; 143 struct node_gid *next; 144 struct node_gid *tail; 145 }; 146 147 struct node_icmp { 148 u_int8_t code; 149 u_int8_t type; 150 u_int8_t proto; 151 struct node_icmp *next; 152 struct node_icmp *tail; 153 }; 154 155 enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK, 156 PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN, 157 PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES, 158 PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK, 159 PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, PF_STATE_OPT_PICKUPS }; 160 161 enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE }; 162 163 struct node_state_opt { 164 int type; 165 union { 166 u_int32_t max_states; 167 u_int32_t max_src_states; 168 u_int32_t max_src_conn; 169 struct { 170 u_int32_t limit; 171 u_int32_t seconds; 172 } max_src_conn_rate; 173 struct { 174 u_int8_t flush; 175 char tblname[PF_TABLE_NAME_SIZE]; 176 } overload; 177 u_int32_t max_src_nodes; 178 u_int8_t src_track; 179 u_int8_t pickup_mode; 180 u_int32_t statelock; 181 struct { 182 int number; 183 u_int32_t seconds; 184 } timeout; 185 } data; 186 struct node_state_opt *next; 187 struct node_state_opt *tail; 188 }; 189 190 struct peer { 191 struct node_host *host; 192 struct node_port *port; 193 }; 194 195 struct node_queue { 196 char queue[PF_QNAME_SIZE]; 197 char parent[PF_QNAME_SIZE]; 198 char ifname[IFNAMSIZ]; 199 int scheduler; 200 struct node_queue *next; 201 struct node_queue *tail; 202 } *queues = NULL; 203 204 struct node_qassign { 205 char *qname; 206 char *pqname; 207 }; 208 209 struct filter_opts { 210 int marker; 211 #define FOM_FLAGS 0x01 212 #define FOM_ICMP 0x02 213 #define FOM_TOS 0x04 214 #define FOM_KEEP 0x08 215 #define FOM_SRCTRACK 0x10 216 struct node_uid *uid; 217 struct node_gid *gid; 218 struct { 219 u_int8_t b1; 220 u_int8_t b2; 221 u_int16_t w; 222 u_int16_t w2; 223 } flags; 224 struct node_icmp *icmpspec; 225 u_int32_t tos; 226 u_int32_t prob; 227 struct { 228 int action; 229 struct node_state_opt *options; 230 } keep; 231 int fragment; 232 int allowopts; 233 char *label; 234 struct node_qassign queues; 235 char *tag; 236 char *match_tag; 237 u_int8_t match_tag_not; 238 u_int rtableid; 239 struct { 240 struct node_host *addr; 241 u_int16_t port; 242 } divert; 243 } filter_opts; 244 245 struct antispoof_opts { 246 char *label; 247 u_int rtableid; 248 } antispoof_opts; 249 250 struct scrub_opts { 251 int marker; 252 #define SOM_MINTTL 0x01 253 #define SOM_MAXMSS 0x02 254 #define SOM_FRAGCACHE 0x04 255 #define SOM_SETTOS 0x08 256 int nodf; 257 int minttl; 258 int maxmss; 259 int settos; 260 int fragcache; 261 int randomid; 262 int reassemble_tcp; 263 char *match_tag; 264 u_int8_t match_tag_not; 265 u_int rtableid; 266 } scrub_opts; 267 268 struct queue_opts { 269 int marker; 270 #define QOM_BWSPEC 0x01 271 #define QOM_SCHEDULER 0x02 272 #define QOM_PRIORITY 0x04 273 #define QOM_TBRSIZE 0x08 274 #define QOM_QLIMIT 0x10 275 struct node_queue_bw queue_bwspec; 276 struct node_queue_opt scheduler; 277 int priority; 278 int tbrsize; 279 int qlimit; 280 } queue_opts; 281 282 struct table_opts { 283 int flags; 284 int init_addr; 285 struct node_tinithead init_nodes; 286 } table_opts; 287 288 struct pool_opts { 289 int marker; 290 #define POM_TYPE 0x01 291 #define POM_STICKYADDRESS 0x02 292 u_int8_t opts; 293 int type; 294 int staticport; 295 struct pf_poolhashkey *key; 296 297 } pool_opts; 298 299 300 struct node_hfsc_opts hfsc_opts; 301 struct node_fairq_opts fairq_opts; 302 303 int disallow_table(struct node_host *, const char *); 304 int disallow_urpf_failed(struct node_host *, const char *); 305 int disallow_alias(struct node_host *, const char *); 306 int rule_consistent(struct pf_rule *, int); 307 int filter_consistent(struct pf_rule *, int); 308 int nat_consistent(struct pf_rule *); 309 int rdr_consistent(struct pf_rule *); 310 int process_tabledef(char *, struct table_opts *); 311 void expand_label_str(char *, size_t, const char *, const char *); 312 void expand_label_if(const char *, char *, size_t, const char *); 313 void expand_label_addr(const char *, char *, size_t, u_int8_t, 314 struct node_host *); 315 void expand_label_port(const char *, char *, size_t, 316 struct node_port *); 317 void expand_label_proto(const char *, char *, size_t, u_int8_t); 318 void expand_label_nr(const char *, char *, size_t); 319 void expand_label(char *, size_t, const char *, u_int8_t, 320 struct node_host *, struct node_port *, struct node_host *, 321 struct node_port *, u_int8_t); 322 void expand_rule(struct pf_rule *, struct node_if *, 323 struct node_host *, struct node_proto *, struct node_os *, 324 struct node_host *, struct node_port *, struct node_host *, 325 struct node_port *, struct node_uid *, struct node_gid *, 326 struct node_icmp *, const char *); 327 int expand_altq(struct pf_altq *, struct node_if *, 328 struct node_queue *, struct node_queue_bw bwspec, 329 struct node_queue_opt *); 330 int expand_queue(struct pf_altq *, struct node_if *, 331 struct node_queue *, struct node_queue_bw, 332 struct node_queue_opt *); 333 int expand_skip_interface(struct node_if *); 334 335 int check_rulestate(int); 336 int getservice(char *); 337 int rule_label(struct pf_rule *, char *); 338 339 void mv_rules(struct pf_ruleset *, struct pf_ruleset *); 340 void decide_address_family(struct node_host *, sa_family_t *); 341 void remove_invalid_hosts(struct node_host **, sa_family_t *); 342 int invalid_redirect(struct node_host *, sa_family_t); 343 u_int16_t parseicmpspec(char *, sa_family_t); 344 345 TAILQ_HEAD(loadanchorshead, loadanchors) 346 loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead); 347 348 struct loadanchors { 349 TAILQ_ENTRY(loadanchors) entries; 350 char *anchorname; 351 char *filename; 352 }; 353 354 typedef struct { 355 union { 356 int64_t number; 357 double probability; 358 int i; 359 char *string; 360 u_int rtableid; 361 struct { 362 u_int8_t b1; 363 u_int8_t b2; 364 u_int16_t w; 365 u_int16_t w2; 366 } b; 367 struct range { 368 int a; 369 int b; 370 int t; 371 } range; 372 struct node_if *interface; 373 struct node_proto *proto; 374 struct node_icmp *icmp; 375 struct node_host *host; 376 struct node_os *os; 377 struct node_port *port; 378 struct node_uid *uid; 379 struct node_gid *gid; 380 struct node_state_opt *state_opt; 381 struct peer peer; 382 struct { 383 struct peer src, dst; 384 struct node_os *src_os; 385 } fromto; 386 struct { 387 struct node_host *host; 388 u_int8_t rt; 389 u_int8_t pool_opts; 390 sa_family_t af; 391 struct pf_poolhashkey *key; 392 } route; 393 struct redirection { 394 struct node_host *host; 395 struct range rport; 396 } *redirection; 397 struct { 398 int action; 399 struct node_state_opt *options; 400 } keep_state; 401 struct { 402 u_int8_t log; 403 u_int8_t logif; 404 u_int8_t quick; 405 } logquick; 406 struct { 407 int neg; 408 char *name; 409 } tagged; 410 struct pf_poolhashkey *hashkey; 411 struct node_queue *queue; 412 struct node_queue_opt queue_options; 413 struct node_queue_bw queue_bwspec; 414 struct node_qassign qassign; 415 struct filter_opts filter_opts; 416 struct antispoof_opts antispoof_opts; 417 struct queue_opts queue_opts; 418 struct scrub_opts scrub_opts; 419 struct table_opts table_opts; 420 struct pool_opts pool_opts; 421 struct node_hfsc_opts hfsc_opts; 422 struct node_fairq_opts fairq_opts; 423 } v; 424 int lineno; 425 } YYSTYPE; 426 427 #define PPORT_RANGE 1 428 #define PPORT_STAR 2 429 int parseport(char *, struct range *r, int); 430 431 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \ 432 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \ 433 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1]))) 434 435 extern char *infile; 436 437 %} 438 439 %token PASS BLOCK SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS 440 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 441 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 442 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 443 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 444 %token REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 445 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID 446 %token REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID 447 %token ANTISPOOF FOR INCLUDE 448 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY 449 %token ALTQ CBQ PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT 450 %token QUEUE PRIORITY QLIMIT RTABLE HOGS BUCKETS 451 %token LOAD RULESET_OPTIMIZATION 452 %token PICKUPS NOPICKUPS HASHONLY 453 %token STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE 454 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY 455 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY ROUTE SETTOS KEEPPOLICY 456 %token DIVERTTO DIVERTREPLY 457 %token <v.string> STRING 458 %token <v.number> NUMBER 459 %token <v.i> PORTBINARY 460 %type <v.interface> interface if_list if_item_not if_item 461 %type <v.number> number icmptype icmp6type uid gid 462 %type <v.number> tos not yesno 463 %type <v.probability> probability 464 %type <v.i> no dir af fragcache optimizer 465 %type <v.i> sourcetrack flush unaryop statelock 466 %type <v.b> action nataction natpasslog scrubaction 467 %type <v.b> flags flag blockspec 468 %type <v.range> portplain portstar portrange 469 %type <v.hashkey> hashkey 470 %type <v.proto> proto proto_list proto_item 471 %type <v.number> protoval 472 %type <v.icmp> icmpspec 473 %type <v.icmp> icmp_list icmp_item 474 %type <v.icmp> icmp6_list icmp6_item 475 %type <v.number> reticmpspec reticmp6spec 476 %type <v.fromto> fromto 477 %type <v.peer> ipportspec from to 478 %type <v.host> ipspec toipspec xhost host dynaddr host_list 479 %type <v.host> redir_host_list redirspec 480 %type <v.host> route_host route_host_list routespec 481 %type <v.os> os xos os_list 482 %type <v.port> portspec port_list port_item 483 %type <v.uid> uids uid_list uid_item 484 %type <v.gid> gids gid_list gid_item 485 %type <v.route> route 486 %type <v.redirection> redirection redirpool 487 %type <v.string> label stringall tag anchorname 488 %type <v.string> string varstring numberstring 489 %type <v.keep_state> keep 490 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item 491 %type <v.logquick> logquick quick log logopts logopt 492 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if 493 %type <v.qassign> qname 494 %type <v.queue> qassign qassign_list qassign_item 495 %type <v.queue_options> scheduler 496 %type <v.number> cbqflags_list cbqflags_item 497 %type <v.number> priqflags_list priqflags_item 498 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 499 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts 500 %type <v.queue_bwspec> bandwidth 501 %type <v.filter_opts> filter_opts filter_opt filter_opts_l 502 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 503 %type <v.queue_opts> queue_opts queue_opt queue_opts_l 504 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 505 %type <v.table_opts> table_opts table_opt table_opts_l 506 %type <v.pool_opts> pool_opts pool_opt pool_opts_l 507 %type <v.tagged> tagged 508 %type <v.rtableid> rtable 509 %% 510 511 ruleset : /* empty */ 512 | ruleset include '\n' 513 | ruleset '\n' 514 | ruleset option '\n' 515 | ruleset scrubrule '\n' 516 | ruleset natrule '\n' 517 | ruleset binatrule '\n' 518 | ruleset pfrule '\n' 519 | ruleset anchorrule '\n' 520 | ruleset loadrule '\n' 521 | ruleset altqif '\n' 522 | ruleset queuespec '\n' 523 | ruleset varset '\n' 524 | ruleset antispoof '\n' 525 | ruleset tabledef '\n' 526 | '{' fakeanchor '}' '\n'; 527 | ruleset error '\n' { file->errors++; } 528 ; 529 530 include : INCLUDE STRING { 531 struct file *nfile; 532 533 if ((nfile = pushfile($2, 0)) == NULL) { 534 yyerror("failed to include file %s", $2); 535 free($2); 536 YYERROR; 537 } 538 free($2); 539 540 file = nfile; 541 lungetc('\n'); 542 } 543 ; 544 545 /* 546 * apply to previouslys specified rule: must be careful to note 547 * what that is: pf or nat or binat or rdr 548 */ 549 fakeanchor : fakeanchor '\n' 550 | fakeanchor anchorrule '\n' 551 | fakeanchor binatrule '\n' 552 | fakeanchor natrule '\n' 553 | fakeanchor pfrule '\n' 554 | fakeanchor error '\n' 555 ; 556 557 optimizer : string { 558 if (!strcmp($1, "none")) 559 $$ = 0; 560 else if (!strcmp($1, "basic")) 561 $$ = PF_OPTIMIZE_BASIC; 562 else if (!strcmp($1, "profile")) 563 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE; 564 else { 565 yyerror("unknown ruleset-optimization %s", $1); 566 YYERROR; 567 } 568 } 569 ; 570 571 option : SET OPTIMIZATION STRING { 572 if (check_rulestate(PFCTL_STATE_OPTION)) { 573 free($3); 574 YYERROR; 575 } 576 if (pfctl_set_optimization(pf, $3) != 0) { 577 yyerror("unknown optimization %s", $3); 578 free($3); 579 YYERROR; 580 } 581 free($3); 582 } 583 | SET RULESET_OPTIMIZATION optimizer { 584 if (!(pf->opts & PF_OPT_OPTIMIZE)) { 585 pf->opts |= PF_OPT_OPTIMIZE; 586 pf->optimize = $3; 587 } 588 } 589 | SET TIMEOUT timeout_spec 590 | SET TIMEOUT '{' optnl timeout_list '}' 591 | SET LIMIT limit_spec 592 | SET LIMIT '{' optnl limit_list '}' 593 | SET LOGINTERFACE stringall { 594 if (check_rulestate(PFCTL_STATE_OPTION)) { 595 free($3); 596 YYERROR; 597 } 598 if (pfctl_set_logif(pf, $3) != 0) { 599 yyerror("error setting loginterface %s", $3); 600 free($3); 601 YYERROR; 602 } 603 free($3); 604 } 605 | SET HOSTID number { 606 if ($3 == 0 || $3 > UINT_MAX) { 607 yyerror("hostid must be non-zero"); 608 YYERROR; 609 } 610 if (pfctl_set_hostid(pf, $3) != 0) { 611 yyerror("error setting hostid %08" PRId64, $3); 612 YYERROR; 613 } 614 } 615 | SET BLOCKPOLICY DROP { 616 if (pf->opts & PF_OPT_VERBOSE) 617 printf("set block-policy drop\n"); 618 if (check_rulestate(PFCTL_STATE_OPTION)) 619 YYERROR; 620 blockpolicy = PFRULE_DROP; 621 } 622 | SET BLOCKPOLICY RETURN { 623 if (pf->opts & PF_OPT_VERBOSE) 624 printf("set block-policy return\n"); 625 if (check_rulestate(PFCTL_STATE_OPTION)) 626 YYERROR; 627 blockpolicy = PFRULE_RETURN; 628 } 629 | SET REQUIREORDER yesno { 630 if (pf->opts & PF_OPT_VERBOSE) 631 printf("set require-order %s\n", 632 $3 == 1 ? "yes" : "no"); 633 require_order = $3; 634 } 635 | SET FINGERPRINTS STRING { 636 if (pf->opts & PF_OPT_VERBOSE) 637 printf("set fingerprints \"%s\"\n", $3); 638 if (check_rulestate(PFCTL_STATE_OPTION)) { 639 free($3); 640 YYERROR; 641 } 642 if (!pf->anchor->name[0]) { 643 if (pfctl_file_fingerprints(pf->dev, 644 pf->opts, $3)) { 645 yyerror("error loading " 646 "fingerprints %s", $3); 647 free($3); 648 YYERROR; 649 } 650 } 651 free($3); 652 } 653 | SET STATEPOLICY statelock { 654 if (pf->opts & PF_OPT_VERBOSE) 655 switch ($3) { 656 case 0: 657 printf("set state-policy floating\n"); 658 break; 659 case PFRULE_IFBOUND: 660 printf("set state-policy if-bound\n"); 661 break; 662 } 663 default_statelock = $3; 664 } 665 | SET KEEPPOLICY keep { 666 if (pf->opts & PF_OPT_VERBOSE) 667 printf("A default keeppolicy was set\n"); 668 default_keeppolicy_action = $3.action; 669 default_keeppolicy_options = $3.options; 670 } 671 | SET DEBUG STRING { 672 if (check_rulestate(PFCTL_STATE_OPTION)) { 673 free($3); 674 YYERROR; 675 } 676 if (pfctl_set_debug(pf, $3) != 0) { 677 yyerror("error setting debuglevel %s", $3); 678 free($3); 679 YYERROR; 680 } 681 free($3); 682 } 683 | SET SKIP interface { 684 if (expand_skip_interface($3) != 0) { 685 yyerror("error setting skip interface(s)"); 686 YYERROR; 687 } 688 } 689 ; 690 691 stringall : STRING { $$ = $1; } 692 | ALL { 693 if (($$ = strdup("all")) == NULL) { 694 err(1, "stringall: strdup"); 695 } 696 } 697 ; 698 699 string : STRING string { 700 if (asprintf(&$$, "%s %s", $1, $2) == -1) 701 err(1, "string: asprintf"); 702 free($1); 703 free($2); 704 } 705 | STRING 706 ; 707 708 varstring : numberstring varstring { 709 if (asprintf(&$$, "%s %s", $1, $2) == -1) 710 err(1, "string: asprintf"); 711 free($1); 712 free($2); 713 } 714 | numberstring 715 ; 716 717 numberstring : NUMBER { 718 char *s; 719 if (asprintf(&s, "%" PRId64, $1) == -1) { 720 yyerror("string: asprintf"); 721 YYERROR; 722 } 723 $$ = s; 724 } 725 | STRING 726 ; 727 728 varset : STRING '=' varstring { 729 if (pf->opts & PF_OPT_VERBOSE) 730 printf("%s = \"%s\"\n", $1, $3); 731 if (symset($1, $3, 0) == -1) 732 err(1, "cannot store variable %s", $1); 733 free($1); 734 free($3); 735 } 736 ; 737 738 anchorname : STRING { $$ = $1; } 739 | /* empty */ { $$ = NULL; } 740 ; 741 742 pfa_anchorlist : /* empty */ 743 | pfa_anchorlist '\n' 744 | pfa_anchorlist pfrule '\n' 745 | pfa_anchorlist anchorrule '\n' 746 ; 747 748 pfa_anchor : '{' 749 { 750 char ta[PF_ANCHOR_NAME_SIZE]; 751 struct pf_ruleset *rs; 752 753 /* steping into a brace anchor */ 754 pf->asd++; 755 pf->bn++; 756 pf->brace = 1; 757 758 /* create a holding ruleset in the root */ 759 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 760 rs = pf_find_or_create_ruleset(ta); 761 if (rs == NULL) 762 err(1, "pfa_anchor: pf_find_or_create_ruleset"); 763 pf->astack[pf->asd] = rs->anchor; 764 pf->anchor = rs->anchor; 765 } '\n' pfa_anchorlist '}' 766 { 767 pf->alast = pf->anchor; 768 pf->asd--; 769 pf->anchor = pf->astack[pf->asd]; 770 } 771 | /* empty */ 772 ; 773 774 anchorrule : ANCHOR anchorname dir quick interface af proto fromto 775 filter_opts pfa_anchor 776 { 777 struct pf_rule r; 778 struct node_proto *proto; 779 780 if (check_rulestate(PFCTL_STATE_FILTER)) { 781 if ($2) 782 free($2); 783 YYERROR; 784 } 785 786 if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) { 787 free($2); 788 yyerror("anchor names beginning with '_' " 789 "are reserved for internal use"); 790 YYERROR; 791 } 792 793 memset(&r, 0, sizeof(r)); 794 if (pf->astack[pf->asd + 1]) { 795 /* move inline rules into relative location */ 796 pf_anchor_setup(&r, 797 &pf->astack[pf->asd]->ruleset, 798 $2 ? $2 : pf->alast->name); 799 800 if (r.anchor == NULL) 801 err(1, "anchorrule: unable to " 802 "create ruleset"); 803 804 if (pf->alast != r.anchor) { 805 if (r.anchor->match) { 806 yyerror("inline anchor '%s' " 807 "already exists", 808 r.anchor->name); 809 YYERROR; 810 } 811 mv_rules(&pf->alast->ruleset, 812 &r.anchor->ruleset); 813 } 814 pf_remove_if_empty_ruleset(&pf->alast->ruleset); 815 pf->alast = r.anchor; 816 } else { 817 if (!$2) { 818 yyerror("anchors without explicit " 819 "rules must specify a name"); 820 YYERROR; 821 } 822 } 823 r.direction = $3; 824 r.quick = $4.quick; 825 r.af = $6; 826 r.prob = $9.prob; 827 r.rtableid = $9.rtableid; 828 829 if ($9.tag) 830 if (strlcpy(r.tagname, $9.tag, 831 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 832 yyerror("tag too long, max %u chars", 833 PF_TAG_NAME_SIZE - 1); 834 YYERROR; 835 } 836 if ($9.match_tag) 837 if (strlcpy(r.match_tagname, $9.match_tag, 838 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 839 yyerror("tag too long, max %u chars", 840 PF_TAG_NAME_SIZE - 1); 841 YYERROR; 842 } 843 r.match_tag_not = $9.match_tag_not; 844 if (rule_label(&r, $9.label)) 845 YYERROR; 846 free($9.label); 847 r.flags = $9.flags.b1; 848 r.flagset = $9.flags.b2; 849 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 850 yyerror("flags always false"); 851 YYERROR; 852 } 853 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 854 for (proto = $7; proto != NULL && 855 proto->proto != IPPROTO_TCP; 856 proto = proto->next) 857 ; /* nothing */ 858 if (proto == NULL && $7 != NULL) { 859 if ($9.flags.b1 || $9.flags.b2) 860 yyerror( 861 "flags only apply to tcp"); 862 if ($8.src_os) 863 yyerror( 864 "OS fingerprinting only " 865 "applies to tcp"); 866 YYERROR; 867 } 868 } 869 870 r.tos = $9.tos; 871 872 if ($9.keep.action) { 873 yyerror("cannot specify state handling " 874 "on anchors"); 875 YYERROR; 876 } 877 878 if ($9.match_tag) 879 if (strlcpy(r.match_tagname, $9.match_tag, 880 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 881 yyerror("tag too long, max %u chars", 882 PF_TAG_NAME_SIZE - 1); 883 YYERROR; 884 } 885 r.match_tag_not = $9.match_tag_not; 886 887 decide_address_family($8.src.host, &r.af); 888 decide_address_family($8.dst.host, &r.af); 889 890 expand_rule(&r, $5, NULL, $7, $8.src_os, 891 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 892 $9.uid, $9.gid, $9.icmpspec, 893 pf->astack[pf->asd + 1] ? pf->alast->name : $2); 894 free($2); 895 pf->astack[pf->asd + 1] = NULL; 896 } 897 | NATANCHOR string interface af proto fromto rtable { 898 struct pf_rule r; 899 900 if (check_rulestate(PFCTL_STATE_NAT)) { 901 free($2); 902 YYERROR; 903 } 904 905 memset(&r, 0, sizeof(r)); 906 r.action = PF_NAT; 907 r.af = $4; 908 r.rtableid = $7; 909 910 decide_address_family($6.src.host, &r.af); 911 decide_address_family($6.dst.host, &r.af); 912 913 expand_rule(&r, $3, NULL, $5, $6.src_os, 914 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 915 0, 0, 0, $2); 916 free($2); 917 } 918 | RDRANCHOR string interface af proto fromto rtable { 919 struct pf_rule r; 920 921 if (check_rulestate(PFCTL_STATE_NAT)) { 922 free($2); 923 YYERROR; 924 } 925 926 memset(&r, 0, sizeof(r)); 927 r.action = PF_RDR; 928 r.af = $4; 929 r.rtableid = $7; 930 931 decide_address_family($6.src.host, &r.af); 932 decide_address_family($6.dst.host, &r.af); 933 934 if ($6.src.port != NULL) { 935 yyerror("source port parameter not supported" 936 " in rdr-anchor"); 937 YYERROR; 938 } 939 if ($6.dst.port != NULL) { 940 if ($6.dst.port->next != NULL) { 941 yyerror("destination port list " 942 "expansion not supported in " 943 "rdr-anchor"); 944 YYERROR; 945 } else if ($6.dst.port->op != PF_OP_EQ) { 946 yyerror("destination port operators" 947 " not supported in rdr-anchor"); 948 YYERROR; 949 } 950 r.dst.port[0] = $6.dst.port->port[0]; 951 r.dst.port[1] = $6.dst.port->port[1]; 952 r.dst.port_op = $6.dst.port->op; 953 } 954 955 expand_rule(&r, $3, NULL, $5, $6.src_os, 956 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 957 0, 0, 0, $2); 958 free($2); 959 } 960 | BINATANCHOR string interface af proto fromto rtable { 961 struct pf_rule r; 962 963 if (check_rulestate(PFCTL_STATE_NAT)) { 964 free($2); 965 YYERROR; 966 } 967 968 memset(&r, 0, sizeof(r)); 969 r.action = PF_BINAT; 970 r.af = $4; 971 r.rtableid = $7; 972 if ($5 != NULL) { 973 if ($5->next != NULL) { 974 yyerror("proto list expansion" 975 " not supported in binat-anchor"); 976 YYERROR; 977 } 978 r.proto = $5->proto; 979 free($5); 980 } 981 982 if ($6.src.host != NULL || $6.src.port != NULL || 983 $6.dst.host != NULL || $6.dst.port != NULL) { 984 yyerror("fromto parameter not supported" 985 " in binat-anchor"); 986 YYERROR; 987 } 988 989 decide_address_family($6.src.host, &r.af); 990 decide_address_family($6.dst.host, &r.af); 991 992 pfctl_add_rule(pf, &r, $2); 993 free($2); 994 } 995 ; 996 997 loadrule : LOAD ANCHOR string FROM string { 998 struct loadanchors *loadanchor; 999 1000 if (strlen(pf->anchor->name) + 1 + 1001 strlen($3) >= MAXPATHLEN) { 1002 yyerror("anchorname %s too long, max %u\n", 1003 $3, MAXPATHLEN - 1); 1004 free($3); 1005 YYERROR; 1006 } 1007 loadanchor = calloc(1, sizeof(struct loadanchors)); 1008 if (loadanchor == NULL) 1009 err(1, "loadrule: calloc"); 1010 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) == 1011 NULL) 1012 err(1, "loadrule: malloc"); 1013 if (pf->anchor->name[0]) 1014 snprintf(loadanchor->anchorname, MAXPATHLEN, 1015 "%s/%s", pf->anchor->name, $3); 1016 else 1017 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN); 1018 if ((loadanchor->filename = strdup($5)) == NULL) 1019 err(1, "loadrule: strdup"); 1020 1021 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 1022 entries); 1023 1024 free($3); 1025 free($5); 1026 }; 1027 1028 scrubaction : no SCRUB { 1029 $$.b2 = $$.w = 0; 1030 if ($1) 1031 $$.b1 = PF_NOSCRUB; 1032 else 1033 $$.b1 = PF_SCRUB; 1034 } 1035 ; 1036 1037 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts 1038 { 1039 struct pf_rule r; 1040 1041 if (check_rulestate(PFCTL_STATE_SCRUB)) 1042 YYERROR; 1043 1044 memset(&r, 0, sizeof(r)); 1045 1046 r.action = $1.b1; 1047 r.direction = $2; 1048 1049 r.log = $3.log; 1050 r.logif = $3.logif; 1051 if ($3.quick) { 1052 yyerror("scrub rules do not support 'quick'"); 1053 YYERROR; 1054 } 1055 1056 r.af = $5; 1057 if ($8.nodf) 1058 r.rule_flag |= PFRULE_NODF; 1059 if ($8.randomid) 1060 r.rule_flag |= PFRULE_RANDOMID; 1061 if ($8.reassemble_tcp) { 1062 if (r.direction != PF_INOUT) { 1063 yyerror("reassemble tcp rules can not " 1064 "specify direction"); 1065 YYERROR; 1066 } 1067 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 1068 } 1069 if ($8.minttl) 1070 r.min_ttl = $8.minttl; 1071 if ($8.maxmss) 1072 r.max_mss = $8.maxmss; 1073 if ($8.marker & SOM_SETTOS) { 1074 r.rule_flag |= PFRULE_SET_TOS; 1075 r.set_tos = $8.settos; 1076 } 1077 if ($8.fragcache) 1078 r.rule_flag |= $8.fragcache; 1079 if ($8.match_tag) 1080 if (strlcpy(r.match_tagname, $8.match_tag, 1081 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1082 yyerror("tag too long, max %u chars", 1083 PF_TAG_NAME_SIZE - 1); 1084 YYERROR; 1085 } 1086 r.match_tag_not = $8.match_tag_not; 1087 r.rtableid = $8.rtableid; 1088 1089 expand_rule(&r, $4, NULL, $6, $7.src_os, 1090 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 1091 NULL, NULL, NULL, ""); 1092 } 1093 ; 1094 1095 scrub_opts : { 1096 bzero(&scrub_opts, sizeof scrub_opts); 1097 scrub_opts.rtableid = -1; 1098 } 1099 scrub_opts_l 1100 { $$ = scrub_opts; } 1101 | /* empty */ { 1102 bzero(&scrub_opts, sizeof scrub_opts); 1103 scrub_opts.rtableid = -1; 1104 $$ = scrub_opts; 1105 } 1106 ; 1107 1108 scrub_opts_l : scrub_opts_l scrub_opt 1109 | scrub_opt 1110 ; 1111 1112 scrub_opt : NODF { 1113 if (scrub_opts.nodf) { 1114 yyerror("no-df cannot be respecified"); 1115 YYERROR; 1116 } 1117 scrub_opts.nodf = 1; 1118 } 1119 | MINTTL NUMBER { 1120 if (scrub_opts.marker & SOM_MINTTL) { 1121 yyerror("min-ttl cannot be respecified"); 1122 YYERROR; 1123 } 1124 if ($2 < 0 || $2 > 255) { 1125 yyerror("illegal min-ttl value %" PRId64, $2); 1126 YYERROR; 1127 } 1128 scrub_opts.marker |= SOM_MINTTL; 1129 scrub_opts.minttl = $2; 1130 } 1131 | MAXMSS NUMBER { 1132 if (scrub_opts.marker & SOM_MAXMSS) { 1133 yyerror("max-mss cannot be respecified"); 1134 YYERROR; 1135 } 1136 if ($2 < 0 || $2 > 65535) { 1137 yyerror("illegal max-mss value %" PRId64, $2); 1138 YYERROR; 1139 } 1140 scrub_opts.marker |= SOM_MAXMSS; 1141 scrub_opts.maxmss = $2; 1142 } 1143 | SETTOS tos { 1144 if (scrub_opts.marker & SOM_SETTOS) { 1145 yyerror("set-tos cannot be respecified"); 1146 YYERROR; 1147 } 1148 scrub_opts.marker |= SOM_SETTOS; 1149 scrub_opts.settos = $2; 1150 } 1151 | fragcache { 1152 if (scrub_opts.marker & SOM_FRAGCACHE) { 1153 yyerror("fragcache cannot be respecified"); 1154 YYERROR; 1155 } 1156 scrub_opts.marker |= SOM_FRAGCACHE; 1157 scrub_opts.fragcache = $1; 1158 } 1159 | REASSEMBLE STRING { 1160 if (strcasecmp($2, "tcp") != 0) { 1161 yyerror("scrub reassemble supports only tcp, " 1162 "not '%s'", $2); 1163 free($2); 1164 YYERROR; 1165 } 1166 free($2); 1167 if (scrub_opts.reassemble_tcp) { 1168 yyerror("reassemble tcp cannot be respecified"); 1169 YYERROR; 1170 } 1171 scrub_opts.reassemble_tcp = 1; 1172 } 1173 | RANDOMID { 1174 if (scrub_opts.randomid) { 1175 yyerror("random-id cannot be respecified"); 1176 YYERROR; 1177 } 1178 scrub_opts.randomid = 1; 1179 } 1180 | RTABLE NUMBER { 1181 scrub_opts.rtableid = $2; 1182 } 1183 | not TAGGED string { 1184 scrub_opts.match_tag = $3; 1185 scrub_opts.match_tag_not = $1; 1186 } 1187 ; 1188 1189 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 1190 | FRAGMENT FRAGCROP { $$ = PFRULE_FRAGCROP; } 1191 | FRAGMENT FRAGDROP { $$ = PFRULE_FRAGDROP; } 1192 ; 1193 1194 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 1195 struct pf_rule r; 1196 struct node_host *h = NULL, *hh; 1197 struct node_if *i, *j; 1198 1199 if (check_rulestate(PFCTL_STATE_FILTER)) 1200 YYERROR; 1201 1202 for (i = $3; i; i = i->next) { 1203 bzero(&r, sizeof(r)); 1204 1205 r.action = PF_DROP; 1206 r.direction = PF_IN; 1207 r.log = $2.log; 1208 r.logif = $2.logif; 1209 r.quick = $2.quick; 1210 r.af = $4; 1211 if (rule_label(&r, $5.label)) 1212 YYERROR; 1213 r.rtableid = $5.rtableid; 1214 j = calloc(1, sizeof(struct node_if)); 1215 if (j == NULL) 1216 err(1, "antispoof: calloc"); 1217 if (strlcpy(j->ifname, i->ifname, 1218 sizeof(j->ifname)) >= sizeof(j->ifname)) { 1219 free(j); 1220 yyerror("interface name too long"); 1221 YYERROR; 1222 } 1223 j->not = 1; 1224 if (i->dynamic) { 1225 h = calloc(1, sizeof(*h)); 1226 if (h == NULL) 1227 err(1, "address: calloc"); 1228 h->addr.type = PF_ADDR_DYNIFTL; 1229 set_ipmask(h, 128); 1230 if (strlcpy(h->addr.v.ifname, i->ifname, 1231 sizeof(h->addr.v.ifname)) >= 1232 sizeof(h->addr.v.ifname)) { 1233 free(h); 1234 yyerror( 1235 "interface name too long"); 1236 YYERROR; 1237 } 1238 hh = malloc(sizeof(*hh)); 1239 if (hh == NULL) 1240 err(1, "address: malloc"); 1241 bcopy(h, hh, sizeof(*hh)); 1242 h->addr.iflags = PFI_AFLAG_NETWORK; 1243 } else { 1244 h = ifa_lookup(j->ifname, 1245 PFI_AFLAG_NETWORK); 1246 hh = NULL; 1247 } 1248 1249 if (h != NULL) 1250 expand_rule(&r, j, NULL, NULL, NULL, h, 1251 NULL, NULL, NULL, NULL, NULL, 1252 NULL, ""); 1253 1254 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 1255 bzero(&r, sizeof(r)); 1256 1257 r.action = PF_DROP; 1258 r.direction = PF_IN; 1259 r.log = $2.log; 1260 r.quick = $2.quick; 1261 r.af = $4; 1262 if (rule_label(&r, $5.label)) 1263 YYERROR; 1264 r.rtableid = $5.rtableid; 1265 if (hh != NULL) 1266 h = hh; 1267 else 1268 h = ifa_lookup(i->ifname, 0); 1269 if (h != NULL) 1270 expand_rule(&r, NULL, NULL, 1271 NULL, NULL, h, NULL, NULL, 1272 NULL, NULL, NULL, NULL, ""); 1273 } else 1274 free(hh); 1275 } 1276 free($5.label); 1277 } 1278 ; 1279 1280 antispoof_ifspc : FOR antispoof_if { $$ = $2; } 1281 | FOR '{' optnl antispoof_iflst '}' { $$ = $4; } 1282 ; 1283 1284 antispoof_iflst : antispoof_if optnl { $$ = $1; } 1285 | antispoof_iflst comma antispoof_if optnl { 1286 $1->tail->next = $3; 1287 $1->tail = $3; 1288 $$ = $1; 1289 } 1290 ; 1291 1292 antispoof_if : if_item { $$ = $1; } 1293 | '(' if_item ')' { 1294 $2->dynamic = 1; 1295 $$ = $2; 1296 } 1297 ; 1298 1299 antispoof_opts : { 1300 bzero(&antispoof_opts, sizeof antispoof_opts); 1301 antispoof_opts.rtableid = -1; 1302 } 1303 antispoof_opts_l 1304 { $$ = antispoof_opts; } 1305 | /* empty */ { 1306 bzero(&antispoof_opts, sizeof antispoof_opts); 1307 antispoof_opts.rtableid = -1; 1308 $$ = antispoof_opts; 1309 } 1310 ; 1311 1312 antispoof_opts_l : antispoof_opts_l antispoof_opt 1313 | antispoof_opt 1314 ; 1315 1316 antispoof_opt : label { 1317 if (antispoof_opts.label) { 1318 yyerror("label cannot be redefined"); 1319 YYERROR; 1320 } 1321 antispoof_opts.label = $1; 1322 } 1323 | RTABLE NUMBER { 1324 antispoof_opts.rtableid = $2; 1325 } 1326 ; 1327 1328 not : '!' { $$ = 1; } 1329 | /* empty */ { $$ = 0; } 1330 ; 1331 1332 tabledef : TABLE '<' STRING '>' table_opts { 1333 struct node_host *h, *nh; 1334 struct node_tinit *ti, *nti; 1335 1336 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 1337 yyerror("table name too long, max %d chars", 1338 PF_TABLE_NAME_SIZE - 1); 1339 free($3); 1340 YYERROR; 1341 } 1342 if (pf->loadopt & PFCTL_FLAG_TABLE) 1343 if (process_tabledef($3, &$5)) { 1344 free($3); 1345 YYERROR; 1346 } 1347 free($3); 1348 for (ti = SIMPLEQ_FIRST(&$5.init_nodes); 1349 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) { 1350 if (ti->file) 1351 free(ti->file); 1352 for (h = ti->host; h != NULL; h = nh) { 1353 nh = h->next; 1354 free(h); 1355 } 1356 nti = SIMPLEQ_NEXT(ti, entries); 1357 free(ti); 1358 } 1359 } 1360 ; 1361 1362 table_opts : { 1363 bzero(&table_opts, sizeof table_opts); 1364 SIMPLEQ_INIT(&table_opts.init_nodes); 1365 } 1366 table_opts_l 1367 { $$ = table_opts; } 1368 | /* empty */ 1369 { 1370 bzero(&table_opts, sizeof table_opts); 1371 SIMPLEQ_INIT(&table_opts.init_nodes); 1372 $$ = table_opts; 1373 } 1374 ; 1375 1376 table_opts_l : table_opts_l table_opt 1377 | table_opt 1378 ; 1379 1380 table_opt : STRING { 1381 if (!strcmp($1, "const")) 1382 table_opts.flags |= PFR_TFLAG_CONST; 1383 else if (!strcmp($1, "persist")) 1384 table_opts.flags |= PFR_TFLAG_PERSIST; 1385 else if (!strcmp($1, "counters")) 1386 table_opts.flags |= PFR_TFLAG_COUNTERS; 1387 else { 1388 yyerror("invalid table option '%s'", $1); 1389 free($1); 1390 YYERROR; 1391 } 1392 free($1); 1393 } 1394 | '{' optnl '}' { table_opts.init_addr = 1; } 1395 | '{' optnl host_list '}' { 1396 struct node_host *n; 1397 struct node_tinit *ti; 1398 1399 for (n = $3; n != NULL; n = n->next) { 1400 switch (n->addr.type) { 1401 case PF_ADDR_ADDRMASK: 1402 continue; /* ok */ 1403 case PF_ADDR_RANGE: 1404 yyerror("address ranges are not " 1405 "permitted inside tables"); 1406 break; 1407 case PF_ADDR_DYNIFTL: 1408 yyerror("dynamic addresses are not " 1409 "permitted inside tables"); 1410 break; 1411 case PF_ADDR_TABLE: 1412 yyerror("tables cannot contain tables"); 1413 break; 1414 case PF_ADDR_NOROUTE: 1415 yyerror("\"no-route\" is not permitted " 1416 "inside tables"); 1417 break; 1418 case PF_ADDR_URPFFAILED: 1419 yyerror("\"urpf-failed\" is not " 1420 "permitted inside tables"); 1421 break; 1422 default: 1423 yyerror("unknown address type %d", 1424 n->addr.type); 1425 } 1426 YYERROR; 1427 } 1428 if (!(ti = calloc(1, sizeof(*ti)))) 1429 err(1, "table_opt: calloc"); 1430 ti->host = $3; 1431 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1432 entries); 1433 table_opts.init_addr = 1; 1434 } 1435 | FILENAME STRING { 1436 struct node_tinit *ti; 1437 1438 if (!(ti = calloc(1, sizeof(*ti)))) 1439 err(1, "table_opt: calloc"); 1440 ti->file = $2; 1441 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1442 entries); 1443 table_opts.init_addr = 1; 1444 } 1445 ; 1446 1447 altqif : ALTQ interface queue_opts QUEUE qassign { 1448 struct pf_altq a; 1449 1450 if (check_rulestate(PFCTL_STATE_QUEUE)) 1451 YYERROR; 1452 1453 memset(&a, 0, sizeof(a)); 1454 if ($3.scheduler.qtype == ALTQT_NONE) { 1455 yyerror("no scheduler specified!"); 1456 YYERROR; 1457 } 1458 a.scheduler = $3.scheduler.qtype; 1459 a.qlimit = $3.qlimit; 1460 a.tbrsize = $3.tbrsize; 1461 if ($5 == NULL) { 1462 yyerror("no child queues specified"); 1463 YYERROR; 1464 } 1465 if (expand_altq(&a, $2, $5, $3.queue_bwspec, 1466 &$3.scheduler)) 1467 YYERROR; 1468 } 1469 ; 1470 1471 queuespec : QUEUE STRING interface queue_opts qassign { 1472 struct pf_altq a; 1473 1474 if (check_rulestate(PFCTL_STATE_QUEUE)) { 1475 free($2); 1476 YYERROR; 1477 } 1478 1479 memset(&a, 0, sizeof(a)); 1480 1481 if (strlcpy(a.qname, $2, sizeof(a.qname)) >= 1482 sizeof(a.qname)) { 1483 yyerror("queue name too long (max " 1484 "%d chars)", PF_QNAME_SIZE-1); 1485 free($2); 1486 YYERROR; 1487 } 1488 free($2); 1489 if ($4.tbrsize) { 1490 yyerror("cannot specify tbrsize for queue"); 1491 YYERROR; 1492 } 1493 if ($4.priority > 255) { 1494 yyerror("priority out of range: max 255"); 1495 YYERROR; 1496 } 1497 a.priority = $4.priority; 1498 a.qlimit = $4.qlimit; 1499 a.scheduler = $4.scheduler.qtype; 1500 if (expand_queue(&a, $3, $5, $4.queue_bwspec, 1501 &$4.scheduler)) { 1502 yyerror("errors in queue definition"); 1503 YYERROR; 1504 } 1505 } 1506 ; 1507 1508 queue_opts : { 1509 bzero(&queue_opts, sizeof queue_opts); 1510 queue_opts.priority = DEFAULT_PRIORITY; 1511 queue_opts.qlimit = DEFAULT_QLIMIT; 1512 queue_opts.scheduler.qtype = ALTQT_NONE; 1513 queue_opts.queue_bwspec.bw_percent = 100; 1514 } 1515 queue_opts_l 1516 { $$ = queue_opts; } 1517 | /* empty */ { 1518 bzero(&queue_opts, sizeof queue_opts); 1519 queue_opts.priority = DEFAULT_PRIORITY; 1520 queue_opts.qlimit = DEFAULT_QLIMIT; 1521 queue_opts.scheduler.qtype = ALTQT_NONE; 1522 queue_opts.queue_bwspec.bw_percent = 100; 1523 $$ = queue_opts; 1524 } 1525 ; 1526 1527 queue_opts_l : queue_opts_l queue_opt 1528 | queue_opt 1529 ; 1530 1531 queue_opt : BANDWIDTH bandwidth { 1532 if (queue_opts.marker & QOM_BWSPEC) { 1533 yyerror("bandwidth cannot be respecified"); 1534 YYERROR; 1535 } 1536 queue_opts.marker |= QOM_BWSPEC; 1537 queue_opts.queue_bwspec = $2; 1538 } 1539 | PRIORITY NUMBER { 1540 if (queue_opts.marker & QOM_PRIORITY) { 1541 yyerror("priority cannot be respecified"); 1542 YYERROR; 1543 } 1544 if ($2 < 0 || $2 > 255) { 1545 yyerror("priority out of range: max 255"); 1546 YYERROR; 1547 } 1548 queue_opts.marker |= QOM_PRIORITY; 1549 queue_opts.priority = $2; 1550 } 1551 | QLIMIT NUMBER { 1552 if (queue_opts.marker & QOM_QLIMIT) { 1553 yyerror("qlimit cannot be respecified"); 1554 YYERROR; 1555 } 1556 if ($2 < 0 || $2 > 65535) { 1557 yyerror("qlimit out of range: max 65535"); 1558 YYERROR; 1559 } 1560 queue_opts.marker |= QOM_QLIMIT; 1561 queue_opts.qlimit = $2; 1562 } 1563 | scheduler { 1564 if (queue_opts.marker & QOM_SCHEDULER) { 1565 yyerror("scheduler cannot be respecified"); 1566 YYERROR; 1567 } 1568 queue_opts.marker |= QOM_SCHEDULER; 1569 queue_opts.scheduler = $1; 1570 } 1571 | TBRSIZE NUMBER { 1572 if (queue_opts.marker & QOM_TBRSIZE) { 1573 yyerror("tbrsize cannot be respecified"); 1574 YYERROR; 1575 } 1576 if ($2 < 0 || $2 > 65535) { 1577 yyerror("tbrsize too big: max 65535"); 1578 YYERROR; 1579 } 1580 queue_opts.marker |= QOM_TBRSIZE; 1581 queue_opts.tbrsize = $2; 1582 } 1583 ; 1584 1585 bandwidth : STRING { 1586 double bps; 1587 char *cp; 1588 1589 $$.bw_percent = 0; 1590 1591 bps = strtod($1, &cp); 1592 if (cp != NULL) { 1593 if (!strcmp(cp, "b")) 1594 ; /* nothing */ 1595 else if (!strcmp(cp, "Kb")) 1596 bps *= 1000; 1597 else if (!strcmp(cp, "Mb")) 1598 bps *= 1000 * 1000; 1599 else if (!strcmp(cp, "Gb")) 1600 bps *= 1000 * 1000 * 1000; 1601 else if (!strcmp(cp, "%")) { 1602 if (bps < 0 || bps > 100) { 1603 yyerror("bandwidth spec " 1604 "out of range"); 1605 free($1); 1606 YYERROR; 1607 } 1608 $$.bw_percent = bps; 1609 bps = 0; 1610 } else { 1611 yyerror("unknown unit %s", cp); 1612 free($1); 1613 YYERROR; 1614 } 1615 } 1616 free($1); 1617 $$.bw_absolute = (u_int32_t)bps; 1618 } 1619 | NUMBER { 1620 if ($1 < 0 || $1 > UINT_MAX) { 1621 yyerror("bandwidth number too big"); 1622 YYERROR; 1623 } 1624 $$.bw_percent = 0; 1625 $$.bw_absolute = $1; 1626 } 1627 ; 1628 1629 scheduler : CBQ { 1630 $$.qtype = ALTQT_CBQ; 1631 $$.data.cbq_opts.flags = 0; 1632 } 1633 | CBQ '(' cbqflags_list ')' { 1634 $$.qtype = ALTQT_CBQ; 1635 $$.data.cbq_opts.flags = $3; 1636 } 1637 | PRIQ { 1638 $$.qtype = ALTQT_PRIQ; 1639 $$.data.priq_opts.flags = 0; 1640 } 1641 | PRIQ '(' priqflags_list ')' { 1642 $$.qtype = ALTQT_PRIQ; 1643 $$.data.priq_opts.flags = $3; 1644 } 1645 | HFSC { 1646 $$.qtype = ALTQT_HFSC; 1647 bzero(&$$.data.hfsc_opts, 1648 sizeof(struct node_hfsc_opts)); 1649 } 1650 | HFSC '(' hfsc_opts ')' { 1651 $$.qtype = ALTQT_HFSC; 1652 $$.data.hfsc_opts = $3; 1653 } 1654 | FAIRQ { 1655 $$.qtype = ALTQT_FAIRQ; 1656 bzero(&$$.data.fairq_opts, 1657 sizeof(struct node_fairq_opts)); 1658 } 1659 | FAIRQ '(' fairq_opts ')' { 1660 $$.qtype = ALTQT_FAIRQ; 1661 $$.data.fairq_opts = $3; 1662 } 1663 ; 1664 1665 cbqflags_list : cbqflags_item { $$ |= $1; } 1666 | cbqflags_list comma cbqflags_item { $$ |= $3; } 1667 ; 1668 1669 cbqflags_item : STRING { 1670 if (!strcmp($1, "default")) 1671 $$ = CBQCLF_DEFCLASS; 1672 else if (!strcmp($1, "borrow")) 1673 $$ = CBQCLF_BORROW; 1674 else if (!strcmp($1, "red")) 1675 $$ = CBQCLF_RED; 1676 else if (!strcmp($1, "ecn")) 1677 $$ = CBQCLF_RED|CBQCLF_ECN; 1678 else if (!strcmp($1, "rio")) 1679 $$ = CBQCLF_RIO; 1680 else { 1681 yyerror("unknown cbq flag \"%s\"", $1); 1682 free($1); 1683 YYERROR; 1684 } 1685 free($1); 1686 } 1687 ; 1688 1689 priqflags_list : priqflags_item { $$ |= $1; } 1690 | priqflags_list comma priqflags_item { $$ |= $3; } 1691 ; 1692 1693 priqflags_item : STRING { 1694 if (!strcmp($1, "default")) 1695 $$ = PRCF_DEFAULTCLASS; 1696 else if (!strcmp($1, "red")) 1697 $$ = PRCF_RED; 1698 else if (!strcmp($1, "ecn")) 1699 $$ = PRCF_RED|PRCF_ECN; 1700 else if (!strcmp($1, "rio")) 1701 $$ = PRCF_RIO; 1702 else { 1703 yyerror("unknown priq flag \"%s\"", $1); 1704 free($1); 1705 YYERROR; 1706 } 1707 free($1); 1708 } 1709 ; 1710 1711 hfsc_opts : { 1712 bzero(&hfsc_opts, 1713 sizeof(struct node_hfsc_opts)); 1714 } 1715 hfscopts_list { 1716 $$ = hfsc_opts; 1717 } 1718 ; 1719 1720 hfscopts_list : hfscopts_item 1721 | hfscopts_list comma hfscopts_item 1722 ; 1723 1724 hfscopts_item : LINKSHARE bandwidth { 1725 if (hfsc_opts.linkshare.used) { 1726 yyerror("linkshare already specified"); 1727 YYERROR; 1728 } 1729 hfsc_opts.linkshare.m2 = $2; 1730 hfsc_opts.linkshare.used = 1; 1731 } 1732 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')' 1733 { 1734 if ($5 < 0 || $5 > INT_MAX) { 1735 yyerror("timing in curve out of range"); 1736 YYERROR; 1737 } 1738 if (hfsc_opts.linkshare.used) { 1739 yyerror("linkshare already specified"); 1740 YYERROR; 1741 } 1742 hfsc_opts.linkshare.m1 = $3; 1743 hfsc_opts.linkshare.d = $5; 1744 hfsc_opts.linkshare.m2 = $7; 1745 hfsc_opts.linkshare.used = 1; 1746 } 1747 | REALTIME bandwidth { 1748 if (hfsc_opts.realtime.used) { 1749 yyerror("realtime already specified"); 1750 YYERROR; 1751 } 1752 hfsc_opts.realtime.m2 = $2; 1753 hfsc_opts.realtime.used = 1; 1754 } 1755 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')' 1756 { 1757 if ($5 < 0 || $5 > INT_MAX) { 1758 yyerror("timing in curve out of range"); 1759 YYERROR; 1760 } 1761 if (hfsc_opts.realtime.used) { 1762 yyerror("realtime already specified"); 1763 YYERROR; 1764 } 1765 hfsc_opts.realtime.m1 = $3; 1766 hfsc_opts.realtime.d = $5; 1767 hfsc_opts.realtime.m2 = $7; 1768 hfsc_opts.realtime.used = 1; 1769 } 1770 | UPPERLIMIT bandwidth { 1771 if (hfsc_opts.upperlimit.used) { 1772 yyerror("upperlimit already specified"); 1773 YYERROR; 1774 } 1775 hfsc_opts.upperlimit.m2 = $2; 1776 hfsc_opts.upperlimit.used = 1; 1777 } 1778 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')' 1779 { 1780 if ($5 < 0 || $5 > INT_MAX) { 1781 yyerror("timing in curve out of range"); 1782 YYERROR; 1783 } 1784 if (hfsc_opts.upperlimit.used) { 1785 yyerror("upperlimit already specified"); 1786 YYERROR; 1787 } 1788 hfsc_opts.upperlimit.m1 = $3; 1789 hfsc_opts.upperlimit.d = $5; 1790 hfsc_opts.upperlimit.m2 = $7; 1791 hfsc_opts.upperlimit.used = 1; 1792 } 1793 | STRING { 1794 if (!strcmp($1, "default")) 1795 hfsc_opts.flags |= HFCF_DEFAULTCLASS; 1796 else if (!strcmp($1, "red")) 1797 hfsc_opts.flags |= HFCF_RED; 1798 else if (!strcmp($1, "ecn")) 1799 hfsc_opts.flags |= HFCF_RED|HFCF_ECN; 1800 else if (!strcmp($1, "rio")) 1801 hfsc_opts.flags |= HFCF_RIO; 1802 else { 1803 yyerror("unknown hfsc flag \"%s\"", $1); 1804 free($1); 1805 YYERROR; 1806 } 1807 free($1); 1808 } 1809 ; 1810 1811 fairq_opts : { 1812 bzero(&fairq_opts, 1813 sizeof(struct node_fairq_opts)); 1814 } 1815 fairqopts_list { 1816 $$ = fairq_opts; 1817 } 1818 ; 1819 1820 fairqopts_list : fairqopts_item 1821 | fairqopts_list comma fairqopts_item 1822 ; 1823 1824 fairqopts_item : LINKSHARE bandwidth { 1825 if (fairq_opts.linkshare.used) { 1826 yyerror("linkshare already specified"); 1827 YYERROR; 1828 } 1829 fairq_opts.linkshare.m2 = $2; 1830 fairq_opts.linkshare.used = 1; 1831 } 1832 | LINKSHARE '(' bandwidth number bandwidth ')' { 1833 if (fairq_opts.linkshare.used) { 1834 yyerror("linkshare already specified"); 1835 YYERROR; 1836 } 1837 fairq_opts.linkshare.m1 = $3; 1838 fairq_opts.linkshare.d = $4; 1839 fairq_opts.linkshare.m2 = $5; 1840 fairq_opts.linkshare.used = 1; 1841 } 1842 | HOGS bandwidth { 1843 fairq_opts.hogs_bw = $2; 1844 } 1845 | BUCKETS number { 1846 fairq_opts.nbuckets = $2; 1847 } 1848 | STRING { 1849 if (!strcmp($1, "default")) 1850 fairq_opts.flags |= FARF_DEFAULTCLASS; 1851 else if (!strcmp($1, "red")) 1852 fairq_opts.flags |= FARF_RED; 1853 else if (!strcmp($1, "ecn")) 1854 fairq_opts.flags |= FARF_RED|FARF_ECN; 1855 else if (!strcmp($1, "rio")) 1856 fairq_opts.flags |= FARF_RIO; 1857 else { 1858 yyerror("unknown fairq flag \"%s\"", $1); 1859 free($1); 1860 YYERROR; 1861 } 1862 free($1); 1863 } 1864 ; 1865 1866 qassign : /* empty */ { $$ = NULL; } 1867 | qassign_item { $$ = $1; } 1868 | '{' optnl qassign_list '}' { $$ = $3; } 1869 ; 1870 1871 qassign_list : qassign_item optnl { $$ = $1; } 1872 | qassign_list comma qassign_item optnl { 1873 $1->tail->next = $3; 1874 $1->tail = $3; 1875 $$ = $1; 1876 } 1877 ; 1878 1879 qassign_item : STRING { 1880 $$ = calloc(1, sizeof(struct node_queue)); 1881 if ($$ == NULL) 1882 err(1, "qassign_item: calloc"); 1883 if (strlcpy($$->queue, $1, sizeof($$->queue)) >= 1884 sizeof($$->queue)) { 1885 yyerror("queue name '%s' too long (max " 1886 "%zd chars)", $1, sizeof($$->queue)-1); 1887 free($1); 1888 free($$); 1889 YYERROR; 1890 } 1891 free($1); 1892 $$->next = NULL; 1893 $$->tail = $$; 1894 } 1895 ; 1896 1897 pfrule : action dir logquick interface route af proto fromto 1898 filter_opts 1899 { 1900 struct pf_rule r; 1901 struct node_state_opt *o; 1902 struct node_proto *proto; 1903 int srctrack = 0; 1904 int statelock = 0; 1905 int adaptive = 0; 1906 int dofree; 1907 1908 if (check_rulestate(PFCTL_STATE_FILTER)) 1909 YYERROR; 1910 1911 memset(&r, 0, sizeof(r)); 1912 1913 r.action = $1.b1; 1914 switch ($1.b2) { 1915 case PFRULE_RETURNRST: 1916 r.rule_flag |= PFRULE_RETURNRST; 1917 r.return_ttl = $1.w; 1918 break; 1919 case PFRULE_RETURNICMP: 1920 r.rule_flag |= PFRULE_RETURNICMP; 1921 r.return_icmp = $1.w; 1922 r.return_icmp6 = $1.w2; 1923 break; 1924 case PFRULE_RETURN: 1925 r.rule_flag |= PFRULE_RETURN; 1926 r.return_icmp = $1.w; 1927 r.return_icmp6 = $1.w2; 1928 break; 1929 } 1930 r.direction = $2; 1931 r.log = $3.log; 1932 r.logif = $3.logif; 1933 r.quick = $3.quick; 1934 r.prob = $9.prob; 1935 r.rtableid = $9.rtableid; 1936 1937 r.af = $6; 1938 if ($9.tag) 1939 if (strlcpy(r.tagname, $9.tag, 1940 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1941 yyerror("tag too long, max %u chars", 1942 PF_TAG_NAME_SIZE - 1); 1943 YYERROR; 1944 } 1945 if ($9.match_tag) 1946 if (strlcpy(r.match_tagname, $9.match_tag, 1947 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1948 yyerror("tag too long, max %u chars", 1949 PF_TAG_NAME_SIZE - 1); 1950 YYERROR; 1951 } 1952 r.match_tag_not = $9.match_tag_not; 1953 if (rule_label(&r, $9.label)) 1954 YYERROR; 1955 free($9.label); 1956 r.flags = $9.flags.b1; 1957 r.flagset = $9.flags.b2; 1958 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 1959 yyerror("flags always false"); 1960 YYERROR; 1961 } 1962 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 1963 for (proto = $7; proto != NULL && 1964 proto->proto != IPPROTO_TCP; 1965 proto = proto->next) 1966 ; /* nothing */ 1967 if (proto == NULL && $7 != NULL) { 1968 if ($9.flags.b1 || $9.flags.b2) 1969 yyerror( 1970 "flags only apply to tcp"); 1971 if ($8.src_os) 1972 yyerror( 1973 "OS fingerprinting only " 1974 "apply to tcp"); 1975 YYERROR; 1976 } 1977 #if 0 1978 if (($9.flags.b1 & parse_flags("S")) == 0 && 1979 $8.src_os) { 1980 yyerror("OS fingerprinting requires " 1981 "the SYN TCP flag (flags S/SA)"); 1982 YYERROR; 1983 } 1984 #endif 1985 } 1986 1987 r.tos = $9.tos; 1988 1989 if (filter_opts.marker & FOM_KEEP) { 1990 r.keep_state = $9.keep.action; 1991 o = $9.keep.options; 1992 dofree = 1; 1993 } else if (r.action == PF_PASS) { 1994 r.keep_state = default_keeppolicy_action; 1995 o = default_keeppolicy_options; 1996 dofree = 0; 1997 } else { 1998 o = NULL; 1999 dofree = 0; 2000 } 2001 while (o) { 2002 struct node_state_opt *p = o; 2003 2004 switch (o->type) { 2005 case PF_STATE_OPT_MAX: 2006 if (r.max_states) { 2007 yyerror("state option 'max' " 2008 "multiple definitions"); 2009 YYERROR; 2010 } 2011 r.max_states = o->data.max_states; 2012 break; 2013 case PF_STATE_OPT_NOSYNC: 2014 if (r.rule_flag & PFRULE_NOSYNC) { 2015 yyerror("state option 'sync' " 2016 "multiple definitions"); 2017 YYERROR; 2018 } 2019 r.rule_flag |= PFRULE_NOSYNC; 2020 break; 2021 case PF_STATE_OPT_SRCTRACK: 2022 if (srctrack) { 2023 yyerror("state option " 2024 "'source-track' " 2025 "multiple definitions"); 2026 YYERROR; 2027 } 2028 srctrack = o->data.src_track; 2029 r.rule_flag |= PFRULE_SRCTRACK; 2030 break; 2031 case PF_STATE_OPT_MAX_SRC_STATES: 2032 if (r.max_src_states) { 2033 yyerror("state option " 2034 "'max-src-states' " 2035 "multiple definitions"); 2036 YYERROR; 2037 } 2038 if (o->data.max_src_states == 0) { 2039 yyerror("'max-src-states' must " 2040 "be > 0"); 2041 YYERROR; 2042 } 2043 r.max_src_states = 2044 o->data.max_src_states; 2045 r.rule_flag |= PFRULE_SRCTRACK; 2046 break; 2047 case PF_STATE_OPT_OVERLOAD: 2048 if (r.overload_tblname[0]) { 2049 yyerror("multiple 'overload' " 2050 "table definitions"); 2051 YYERROR; 2052 } 2053 if (strlcpy(r.overload_tblname, 2054 o->data.overload.tblname, 2055 PF_TABLE_NAME_SIZE) >= 2056 PF_TABLE_NAME_SIZE) { 2057 yyerror("state option: " 2058 "strlcpy"); 2059 YYERROR; 2060 } 2061 r.flush = o->data.overload.flush; 2062 break; 2063 case PF_STATE_OPT_MAX_SRC_CONN: 2064 if (r.max_src_conn) { 2065 yyerror("state option " 2066 "'max-src-conn' " 2067 "multiple definitions"); 2068 YYERROR; 2069 } 2070 if (o->data.max_src_conn == 0) { 2071 yyerror("'max-src-conn' " 2072 "must be > 0"); 2073 YYERROR; 2074 } 2075 r.max_src_conn = 2076 o->data.max_src_conn; 2077 r.rule_flag |= PFRULE_SRCTRACK | 2078 PFRULE_RULESRCTRACK; 2079 break; 2080 case PF_STATE_OPT_MAX_SRC_CONN_RATE: 2081 if (r.max_src_conn_rate.limit) { 2082 yyerror("state option " 2083 "'max-src-conn-rate' " 2084 "multiple definitions"); 2085 YYERROR; 2086 } 2087 if (!o->data.max_src_conn_rate.limit || 2088 !o->data.max_src_conn_rate.seconds) { 2089 yyerror("'max-src-conn-rate' " 2090 "values must be > 0"); 2091 YYERROR; 2092 } 2093 if (o->data.max_src_conn_rate.limit > 2094 PF_THRESHOLD_MAX) { 2095 yyerror("'max-src-conn-rate' " 2096 "maximum rate must be < %u", 2097 PF_THRESHOLD_MAX); 2098 YYERROR; 2099 } 2100 r.max_src_conn_rate.limit = 2101 o->data.max_src_conn_rate.limit; 2102 r.max_src_conn_rate.seconds = 2103 o->data.max_src_conn_rate.seconds; 2104 r.rule_flag |= PFRULE_SRCTRACK | 2105 PFRULE_RULESRCTRACK; 2106 break; 2107 case PF_STATE_OPT_MAX_SRC_NODES: 2108 if (r.max_src_nodes) { 2109 yyerror("state option " 2110 "'max-src-nodes' " 2111 "multiple definitions"); 2112 YYERROR; 2113 } 2114 if (o->data.max_src_nodes == 0) { 2115 yyerror("'max-src-nodes' must " 2116 "be > 0"); 2117 YYERROR; 2118 } 2119 r.max_src_nodes = 2120 o->data.max_src_nodes; 2121 r.rule_flag |= PFRULE_SRCTRACK | 2122 PFRULE_RULESRCTRACK; 2123 break; 2124 case PF_STATE_OPT_STATELOCK: 2125 if (statelock) { 2126 yyerror("state locking option: " 2127 "multiple definitions"); 2128 YYERROR; 2129 } 2130 statelock = 1; 2131 r.rule_flag |= o->data.statelock; 2132 break; 2133 case PF_STATE_OPT_SLOPPY: 2134 if (r.rule_flag & PFRULE_STATESLOPPY) { 2135 yyerror("state sloppy option: " 2136 "multiple definitions"); 2137 YYERROR; 2138 } 2139 r.rule_flag |= PFRULE_STATESLOPPY; 2140 break; 2141 case PF_STATE_OPT_TIMEOUT: 2142 if (o->data.timeout.number == 2143 PFTM_ADAPTIVE_START || 2144 o->data.timeout.number == 2145 PFTM_ADAPTIVE_END) 2146 adaptive = 1; 2147 if (r.timeout[o->data.timeout.number]) { 2148 yyerror("state timeout %s " 2149 "multiple definitions", 2150 pf_timeouts[o->data. 2151 timeout.number].name); 2152 YYERROR; 2153 } 2154 r.timeout[o->data.timeout.number] = 2155 o->data.timeout.seconds; 2156 break; 2157 case PF_STATE_OPT_PICKUPS: 2158 r.pickup_mode = o->data.pickup_mode; 2159 break; 2160 } 2161 o = o->next; 2162 if (dofree) 2163 free(p); 2164 } 2165 2166 #if 0 2167 /* 'flags S/SA' by default on stateful rules */ 2168 if (!r.action && !r.flags && !r.flagset && 2169 !$9.fragment && !($9.marker & FOM_FLAGS) && 2170 r.keep_state) { 2171 r.flags = parse_flags("S"); 2172 r.flagset = parse_flags("SA"); 2173 } 2174 #endif 2175 if (!adaptive && r.max_states) { 2176 r.timeout[PFTM_ADAPTIVE_START] = 2177 (r.max_states / 10) * 6; 2178 r.timeout[PFTM_ADAPTIVE_END] = 2179 (r.max_states / 10) * 12; 2180 } 2181 if (r.rule_flag & PFRULE_SRCTRACK) { 2182 if (srctrack == PF_SRCTRACK_GLOBAL && 2183 r.max_src_nodes) { 2184 yyerror("'max-src-nodes' is " 2185 "incompatible with " 2186 "'source-track global'"); 2187 YYERROR; 2188 } 2189 if (srctrack == PF_SRCTRACK_GLOBAL && 2190 r.max_src_conn) { 2191 yyerror("'max-src-conn' is " 2192 "incompatible with " 2193 "'source-track global'"); 2194 YYERROR; 2195 } 2196 if (srctrack == PF_SRCTRACK_GLOBAL && 2197 r.max_src_conn_rate.seconds) { 2198 yyerror("'max-src-conn-rate' is " 2199 "incompatible with " 2200 "'source-track global'"); 2201 YYERROR; 2202 } 2203 if (r.timeout[PFTM_SRC_NODE] < 2204 r.max_src_conn_rate.seconds) 2205 r.timeout[PFTM_SRC_NODE] = 2206 r.max_src_conn_rate.seconds; 2207 r.rule_flag |= PFRULE_SRCTRACK; 2208 if (srctrack == PF_SRCTRACK_RULE) 2209 r.rule_flag |= PFRULE_RULESRCTRACK; 2210 } 2211 if (r.keep_state && !statelock) 2212 r.rule_flag |= default_statelock; 2213 2214 if ($9.fragment) 2215 r.rule_flag |= PFRULE_FRAGMENT; 2216 r.allow_opts = $9.allowopts; 2217 2218 decide_address_family($8.src.host, &r.af); 2219 decide_address_family($8.dst.host, &r.af); 2220 2221 if ($5.rt) { 2222 if (!r.direction) { 2223 yyerror("direction must be explicit " 2224 "with rules that specify routing"); 2225 YYERROR; 2226 } 2227 r.rt = $5.rt; 2228 r.rpool.opts = $5.pool_opts; 2229 if ($5.key != NULL) 2230 memcpy(&r.rpool.key, $5.key, 2231 sizeof(struct pf_poolhashkey)); 2232 } 2233 if (r.rt && r.rt != PF_FASTROUTE) { 2234 decide_address_family($5.host, &r.af); 2235 remove_invalid_hosts(&$5.host, &r.af); 2236 if ($5.host == NULL) { 2237 yyerror("no routing address with " 2238 "matching address family found."); 2239 YYERROR; 2240 } 2241 if ((r.rpool.opts & PF_POOL_TYPEMASK) == 2242 PF_POOL_NONE && ($5.host->next != NULL || 2243 $5.host->addr.type == PF_ADDR_TABLE || 2244 DYNIF_MULTIADDR($5.host->addr))) 2245 r.rpool.opts |= PF_POOL_ROUNDROBIN; 2246 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2247 PF_POOL_ROUNDROBIN && 2248 disallow_table($5.host, "tables are only " 2249 "supported in round-robin routing pools")) 2250 YYERROR; 2251 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2252 PF_POOL_ROUNDROBIN && 2253 disallow_alias($5.host, "interface (%s) " 2254 "is only supported in round-robin " 2255 "routing pools")) 2256 YYERROR; 2257 if ($5.host->next != NULL) { 2258 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2259 PF_POOL_ROUNDROBIN) { 2260 yyerror("r.rpool.opts must " 2261 "be PF_POOL_ROUNDROBIN"); 2262 YYERROR; 2263 } 2264 } 2265 } 2266 if ($9.queues.qname != NULL) { 2267 if (strlcpy(r.qname, $9.queues.qname, 2268 sizeof(r.qname)) >= sizeof(r.qname)) { 2269 yyerror("rule qname too long (max " 2270 "%zd chars)", sizeof(r.qname)-1); 2271 YYERROR; 2272 } 2273 free($9.queues.qname); 2274 } 2275 if ($9.queues.pqname != NULL) { 2276 if (strlcpy(r.pqname, $9.queues.pqname, 2277 sizeof(r.pqname)) >= sizeof(r.pqname)) { 2278 yyerror("rule pqname too long (max " 2279 "%zd chars)", sizeof(r.pqname)-1); 2280 YYERROR; 2281 } 2282 free($9.queues.pqname); 2283 } 2284 if ((r.divert.port = $9.divert.port)) { 2285 if (r.direction == PF_OUT) { 2286 if ($9.divert.addr) { 2287 yyerror("address specified " 2288 "for outgoing divert"); 2289 YYERROR; 2290 } 2291 bzero(&r.divert.addr, 2292 sizeof(r.divert.addr)); 2293 } else { 2294 if (!$9.divert.addr) { 2295 yyerror("no address specified " 2296 "for incoming divert"); 2297 YYERROR; 2298 } 2299 if ($9.divert.addr->af != r.af) { 2300 yyerror("address family " 2301 "mismatch for divert"); 2302 YYERROR; 2303 } 2304 r.divert.addr = 2305 $9.divert.addr->addr.v.a.addr; 2306 } 2307 } 2308 2309 expand_rule(&r, $4, $5.host, $7, $8.src_os, 2310 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 2311 $9.uid, $9.gid, $9.icmpspec, ""); 2312 } 2313 ; 2314 2315 filter_opts : { 2316 bzero(&filter_opts, sizeof filter_opts); 2317 filter_opts.rtableid = -1; 2318 } 2319 filter_opts_l 2320 { $$ = filter_opts; } 2321 | /* empty */ { 2322 bzero(&filter_opts, sizeof filter_opts); 2323 filter_opts.rtableid = -1; 2324 $$ = filter_opts; 2325 } 2326 ; 2327 2328 filter_opts_l : filter_opts_l filter_opt 2329 | filter_opt 2330 ; 2331 2332 filter_opt : USER uids { 2333 if (filter_opts.uid) 2334 $2->tail->next = filter_opts.uid; 2335 filter_opts.uid = $2; 2336 } 2337 | GROUP gids { 2338 if (filter_opts.gid) 2339 $2->tail->next = filter_opts.gid; 2340 filter_opts.gid = $2; 2341 } 2342 | flags { 2343 if (filter_opts.marker & FOM_FLAGS) { 2344 yyerror("flags cannot be redefined"); 2345 YYERROR; 2346 } 2347 filter_opts.marker |= FOM_FLAGS; 2348 filter_opts.flags.b1 |= $1.b1; 2349 filter_opts.flags.b2 |= $1.b2; 2350 filter_opts.flags.w |= $1.w; 2351 filter_opts.flags.w2 |= $1.w2; 2352 } 2353 | icmpspec { 2354 if (filter_opts.marker & FOM_ICMP) { 2355 yyerror("icmp-type cannot be redefined"); 2356 YYERROR; 2357 } 2358 filter_opts.marker |= FOM_ICMP; 2359 filter_opts.icmpspec = $1; 2360 } 2361 | TOS tos { 2362 if (filter_opts.marker & FOM_TOS) { 2363 yyerror("tos cannot be redefined"); 2364 YYERROR; 2365 } 2366 filter_opts.marker |= FOM_TOS; 2367 filter_opts.tos = $2; 2368 } 2369 | keep { 2370 if (filter_opts.marker & FOM_KEEP) { 2371 yyerror("modulate or keep cannot be redefined"); 2372 YYERROR; 2373 } 2374 filter_opts.marker |= FOM_KEEP; 2375 filter_opts.keep.action = $1.action; 2376 filter_opts.keep.options = $1.options; 2377 } 2378 | FRAGMENT { 2379 filter_opts.fragment = 1; 2380 } 2381 | ALLOWOPTS { 2382 filter_opts.allowopts = 1; 2383 } 2384 | label { 2385 if (filter_opts.label) { 2386 yyerror("label cannot be redefined"); 2387 YYERROR; 2388 } 2389 filter_opts.label = $1; 2390 } 2391 | qname { 2392 if (filter_opts.queues.qname) { 2393 yyerror("queue cannot be redefined"); 2394 YYERROR; 2395 } 2396 filter_opts.queues = $1; 2397 } 2398 | TAG string { 2399 filter_opts.tag = $2; 2400 } 2401 | not TAGGED string { 2402 filter_opts.match_tag = $3; 2403 filter_opts.match_tag_not = $1; 2404 } 2405 | PROBABILITY probability { 2406 double p; 2407 2408 p = floor($2 * UINT_MAX + 0.5); 2409 if (p < 0.0 || p > UINT_MAX) { 2410 yyerror("invalid probability: %lf", p); 2411 YYERROR; 2412 } 2413 filter_opts.prob = (u_int32_t)p; 2414 if (filter_opts.prob == 0) 2415 filter_opts.prob = 1; 2416 } 2417 | RTABLE NUMBER { 2418 filter_opts.rtableid = $2; 2419 } 2420 | DIVERTTO STRING PORT portplain { 2421 if ((filter_opts.divert.addr = host($2)) == NULL) { 2422 yyerror("could not parse divert address: %s", 2423 $2); 2424 free($2); 2425 YYERROR; 2426 } 2427 free($2); 2428 filter_opts.divert.port = $4.a; 2429 if (!filter_opts.divert.port) { 2430 yyerror("invalid divert port: %u", ntohs($4.a)); 2431 YYERROR; 2432 } 2433 } 2434 | DIVERTREPLY { 2435 filter_opts.divert.port = 1; /* some random value */ 2436 } 2437 ; 2438 2439 probability : STRING { 2440 char *e; 2441 double p = strtod($1, &e); 2442 2443 if (*e == '%') { 2444 p *= 0.01; 2445 e++; 2446 } 2447 if (*e) { 2448 yyerror("invalid probability: %s", $1); 2449 free($1); 2450 YYERROR; 2451 } 2452 free($1); 2453 $$ = p; 2454 } 2455 | NUMBER { 2456 $$ = (double)$1; 2457 } 2458 ; 2459 2460 2461 action : PASS { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; } 2462 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 2463 ; 2464 2465 blockspec : /* empty */ { 2466 $$.b2 = blockpolicy; 2467 $$.w = returnicmpdefault; 2468 $$.w2 = returnicmp6default; 2469 } 2470 | DROP { 2471 $$.b2 = PFRULE_DROP; 2472 $$.w = 0; 2473 $$.w2 = 0; 2474 } 2475 | RETURNRST { 2476 $$.b2 = PFRULE_RETURNRST; 2477 $$.w = 0; 2478 $$.w2 = 0; 2479 } 2480 | RETURNRST '(' TTL NUMBER ')' { 2481 if ($4 < 0 || $4 > 255) { 2482 yyerror("illegal ttl value %" PRId64, $4); 2483 YYERROR; 2484 } 2485 $$.b2 = PFRULE_RETURNRST; 2486 $$.w = $4; 2487 $$.w2 = 0; 2488 } 2489 | RETURNICMP { 2490 $$.b2 = PFRULE_RETURNICMP; 2491 $$.w = returnicmpdefault; 2492 $$.w2 = returnicmp6default; 2493 } 2494 | RETURNICMP6 { 2495 $$.b2 = PFRULE_RETURNICMP; 2496 $$.w = returnicmpdefault; 2497 $$.w2 = returnicmp6default; 2498 } 2499 | RETURNICMP '(' reticmpspec ')' { 2500 $$.b2 = PFRULE_RETURNICMP; 2501 $$.w = $3; 2502 $$.w2 = returnicmpdefault; 2503 } 2504 | RETURNICMP6 '(' reticmp6spec ')' { 2505 $$.b2 = PFRULE_RETURNICMP; 2506 $$.w = returnicmpdefault; 2507 $$.w2 = $3; 2508 } 2509 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' { 2510 $$.b2 = PFRULE_RETURNICMP; 2511 $$.w = $3; 2512 $$.w2 = $5; 2513 } 2514 | RETURN { 2515 $$.b2 = PFRULE_RETURN; 2516 $$.w = returnicmpdefault; 2517 $$.w2 = returnicmp6default; 2518 } 2519 ; 2520 2521 reticmpspec : STRING { 2522 if (!($$ = parseicmpspec($1, AF_INET))) { 2523 free($1); 2524 YYERROR; 2525 } 2526 free($1); 2527 } 2528 | NUMBER { 2529 u_int8_t icmptype; 2530 2531 if ($1 < 0 || $1 > 255) { 2532 yyerror("invalid icmp code %" PRId64, $1); 2533 YYERROR; 2534 } 2535 icmptype = returnicmpdefault >> 8; 2536 $$ = (icmptype << 8 | $1); 2537 } 2538 ; 2539 2540 reticmp6spec : STRING { 2541 if (!($$ = parseicmpspec($1, AF_INET6))) { 2542 free($1); 2543 YYERROR; 2544 } 2545 free($1); 2546 } 2547 | NUMBER { 2548 u_int8_t icmptype; 2549 2550 if ($1 < 0 || $1 > 255) { 2551 yyerror("invalid icmp code %" PRId64, $1); 2552 YYERROR; 2553 } 2554 icmptype = returnicmp6default >> 8; 2555 $$ = (icmptype << 8 | $1); 2556 } 2557 ; 2558 2559 dir : /* empty */ { $$ = PF_INOUT; } 2560 | IN { $$ = PF_IN; } 2561 | OUT { $$ = PF_OUT; } 2562 ; 2563 2564 quick : /* empty */ { $$.quick = 0; } 2565 | QUICK { $$.quick = 1; } 2566 ; 2567 2568 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; } 2569 | log { $$ = $1; $$.quick = 0; } 2570 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; } 2571 | log QUICK { $$ = $1; $$.quick = 1; } 2572 | QUICK log { $$ = $2; $$.quick = 1; } 2573 ; 2574 2575 log : LOG { $$.log = PF_LOG; $$.logif = 0; } 2576 | LOG '(' logopts ')' { 2577 $$.log = PF_LOG | $3.log; 2578 $$.logif = $3.logif; 2579 } 2580 ; 2581 2582 logopts : logopt { $$ = $1; } 2583 | logopts comma logopt { 2584 $$.log = $1.log | $3.log; 2585 $$.logif = $3.logif; 2586 if ($$.logif == 0) 2587 $$.logif = $1.logif; 2588 } 2589 ; 2590 2591 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; } 2592 | USER { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 2593 | GROUP { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 2594 | TO string { 2595 const char *errstr; 2596 u_int i; 2597 2598 $$.log = 0; 2599 if (strncmp($2, "pflog", 5)) { 2600 yyerror("%s: should be a pflog interface", $2); 2601 free($2); 2602 YYERROR; 2603 } 2604 i = strtonum($2 + 5, 0, 255, &errstr); 2605 if (errstr) { 2606 yyerror("%s: %s", $2, errstr); 2607 free($2); 2608 YYERROR; 2609 } 2610 free($2); 2611 $$.logif = i; 2612 } 2613 ; 2614 2615 interface : /* empty */ { $$ = NULL; } 2616 | ON if_item_not { $$ = $2; } 2617 | ON '{' optnl if_list '}' { $$ = $4; } 2618 ; 2619 2620 if_list : if_item_not optnl { $$ = $1; } 2621 | if_list comma if_item_not optnl { 2622 $1->tail->next = $3; 2623 $1->tail = $3; 2624 $$ = $1; 2625 } 2626 ; 2627 2628 if_item_not : not if_item { $$ = $2; $$->not = $1; } 2629 ; 2630 2631 if_item : STRING { 2632 struct node_host *n; 2633 2634 $$ = calloc(1, sizeof(struct node_if)); 2635 if ($$ == NULL) 2636 err(1, "if_item: calloc"); 2637 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 2638 sizeof($$->ifname)) { 2639 free($1); 2640 free($$); 2641 yyerror("interface name too long"); 2642 YYERROR; 2643 } 2644 2645 if ((n = ifa_exists($1)) != NULL) 2646 $$->ifa_flags = n->ifa_flags; 2647 2648 free($1); 2649 $$->not = 0; 2650 $$->next = NULL; 2651 $$->tail = $$; 2652 } 2653 ; 2654 2655 af : /* empty */ { $$ = 0; } 2656 | INET { $$ = AF_INET; } 2657 | INET6 { $$ = AF_INET6; } 2658 ; 2659 2660 proto : /* empty */ { $$ = NULL; } 2661 | PROTO proto_item { $$ = $2; } 2662 | PROTO '{' optnl proto_list '}' { $$ = $4; } 2663 ; 2664 2665 proto_list : proto_item optnl { $$ = $1; } 2666 | proto_list comma proto_item optnl { 2667 $1->tail->next = $3; 2668 $1->tail = $3; 2669 $$ = $1; 2670 } 2671 ; 2672 2673 proto_item : protoval { 2674 u_int8_t pr; 2675 2676 pr = (u_int8_t)$1; 2677 if (pr == 0) { 2678 yyerror("proto 0 cannot be used"); 2679 YYERROR; 2680 } 2681 $$ = calloc(1, sizeof(struct node_proto)); 2682 if ($$ == NULL) 2683 err(1, "proto_item: calloc"); 2684 $$->proto = pr; 2685 $$->next = NULL; 2686 $$->tail = $$; 2687 } 2688 ; 2689 2690 protoval : STRING { 2691 struct protoent *p; 2692 2693 p = getprotobyname($1); 2694 if (p == NULL) { 2695 yyerror("unknown protocol %s", $1); 2696 free($1); 2697 YYERROR; 2698 } 2699 $$ = p->p_proto; 2700 free($1); 2701 } 2702 | NUMBER { 2703 if ($1 < 0 || $1 > 255) { 2704 yyerror("protocol outside range"); 2705 YYERROR; 2706 } 2707 } 2708 ; 2709 2710 fromto : ALL { 2711 $$.src.host = NULL; 2712 $$.src.port = NULL; 2713 $$.dst.host = NULL; 2714 $$.dst.port = NULL; 2715 $$.src_os = NULL; 2716 } 2717 | from os to { 2718 $$.src = $1; 2719 $$.src_os = $2; 2720 $$.dst = $3; 2721 } 2722 ; 2723 2724 os : /* empty */ { $$ = NULL; } 2725 | OS xos { $$ = $2; } 2726 | OS '{' optnl os_list '}' { $$ = $4; } 2727 ; 2728 2729 xos : STRING { 2730 $$ = calloc(1, sizeof(struct node_os)); 2731 if ($$ == NULL) 2732 err(1, "os: calloc"); 2733 $$->os = $1; 2734 $$->tail = $$; 2735 } 2736 ; 2737 2738 os_list : xos optnl { $$ = $1; } 2739 | os_list comma xos optnl { 2740 $1->tail->next = $3; 2741 $1->tail = $3; 2742 $$ = $1; 2743 } 2744 ; 2745 2746 from : /* empty */ { 2747 $$.host = NULL; 2748 $$.port = NULL; 2749 } 2750 | FROM ipportspec { 2751 $$ = $2; 2752 } 2753 ; 2754 2755 to : /* empty */ { 2756 $$.host = NULL; 2757 $$.port = NULL; 2758 } 2759 | TO ipportspec { 2760 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is " 2761 "not permitted in a destination address")) 2762 YYERROR; 2763 $$ = $2; 2764 } 2765 ; 2766 2767 ipportspec : ipspec { 2768 $$.host = $1; 2769 $$.port = NULL; 2770 } 2771 | ipspec PORT portspec { 2772 $$.host = $1; 2773 $$.port = $3; 2774 } 2775 | PORT portspec { 2776 $$.host = NULL; 2777 $$.port = $2; 2778 } 2779 ; 2780 2781 optnl : '\n' optnl 2782 | 2783 ; 2784 2785 ipspec : ANY { $$ = NULL; } 2786 | xhost { $$ = $1; } 2787 | '{' optnl host_list '}' { $$ = $3; } 2788 ; 2789 2790 toipspec : TO ipspec { $$ = $2; } 2791 | /* empty */ { $$ = NULL; } 2792 ; 2793 2794 host_list : ipspec optnl { $$ = $1; } 2795 | host_list comma ipspec optnl { 2796 if ($3 == NULL) 2797 $$ = $1; 2798 else if ($1 == NULL) 2799 $$ = $3; 2800 else { 2801 $1->tail->next = $3; 2802 $1->tail = $3->tail; 2803 $$ = $1; 2804 } 2805 } 2806 ; 2807 2808 xhost : not host { 2809 struct node_host *n; 2810 2811 for (n = $2; n != NULL; n = n->next) 2812 n->not = $1; 2813 $$ = $2; 2814 } 2815 | not NOROUTE { 2816 $$ = calloc(1, sizeof(struct node_host)); 2817 if ($$ == NULL) 2818 err(1, "xhost: calloc"); 2819 $$->addr.type = PF_ADDR_NOROUTE; 2820 $$->next = NULL; 2821 $$->not = $1; 2822 $$->tail = $$; 2823 } 2824 | not URPFFAILED { 2825 $$ = calloc(1, sizeof(struct node_host)); 2826 if ($$ == NULL) 2827 err(1, "xhost: calloc"); 2828 $$->addr.type = PF_ADDR_URPFFAILED; 2829 $$->next = NULL; 2830 $$->not = $1; 2831 $$->tail = $$; 2832 } 2833 ; 2834 2835 host : STRING { 2836 if (($$ = host($1)) == NULL) { 2837 /* error. "any" is handled elsewhere */ 2838 free($1); 2839 yyerror("could not parse host specification"); 2840 YYERROR; 2841 } 2842 free($1); 2843 2844 } 2845 | STRING '-' STRING { 2846 struct node_host *b, *e; 2847 2848 if ((b = host($1)) == NULL || (e = host($3)) == NULL) { 2849 free($1); 2850 free($3); 2851 yyerror("could not parse host specification"); 2852 YYERROR; 2853 } 2854 if (b->af != e->af || 2855 b->addr.type != PF_ADDR_ADDRMASK || 2856 e->addr.type != PF_ADDR_ADDRMASK || 2857 unmask(&b->addr.v.a.mask, b->af) != 2858 (b->af == AF_INET ? 32 : 128) || 2859 unmask(&e->addr.v.a.mask, e->af) != 2860 (e->af == AF_INET ? 32 : 128) || 2861 b->next != NULL || b->not || 2862 e->next != NULL || e->not) { 2863 free(b); 2864 free(e); 2865 free($1); 2866 free($3); 2867 yyerror("invalid address range"); 2868 YYERROR; 2869 } 2870 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr, 2871 sizeof(b->addr.v.a.mask)); 2872 b->addr.type = PF_ADDR_RANGE; 2873 $$ = b; 2874 free(e); 2875 free($1); 2876 free($3); 2877 } 2878 | STRING '/' NUMBER { 2879 char *buf; 2880 2881 if (asprintf(&buf, "%s/%" PRId64, $1, $3) == -1) 2882 err(1, "host: asprintf"); 2883 free($1); 2884 if (($$ = host(buf)) == NULL) { 2885 /* error. "any" is handled elsewhere */ 2886 free(buf); 2887 yyerror("could not parse host specification"); 2888 YYERROR; 2889 } 2890 free(buf); 2891 } 2892 | NUMBER '/' NUMBER { 2893 char *buf; 2894 2895 /* ie. for 10/8 parsing */ 2896 if (asprintf(&buf, "%" PRId64 "/%" PRId64, $1, $3) == -1) 2897 err(1, "host: asprintf"); 2898 if (($$ = host(buf)) == NULL) { 2899 /* error. "any" is handled elsewhere */ 2900 free(buf); 2901 yyerror("could not parse host specification"); 2902 YYERROR; 2903 } 2904 free(buf); 2905 } 2906 | dynaddr 2907 | dynaddr '/' NUMBER { 2908 struct node_host *n; 2909 2910 if ($3 < 0 || $3 > 128) { 2911 yyerror("bit number too big"); 2912 YYERROR; 2913 } 2914 $$ = $1; 2915 for (n = $1; n != NULL; n = n->next) 2916 set_ipmask(n, $3); 2917 } 2918 | '<' STRING '>' { 2919 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 2920 yyerror("table name '%s' too long", $2); 2921 free($2); 2922 YYERROR; 2923 } 2924 $$ = calloc(1, sizeof(struct node_host)); 2925 if ($$ == NULL) 2926 err(1, "host: calloc"); 2927 $$->addr.type = PF_ADDR_TABLE; 2928 if (strlcpy($$->addr.v.tblname, $2, 2929 sizeof($$->addr.v.tblname)) >= 2930 sizeof($$->addr.v.tblname)) 2931 errx(1, "host: strlcpy"); 2932 free($2); 2933 $$->next = NULL; 2934 $$->tail = $$; 2935 } 2936 | ROUTE STRING { 2937 $$ = calloc(1, sizeof(struct node_host)); 2938 if ($$ == NULL) { 2939 free($2); 2940 err(1, "host: calloc"); 2941 } 2942 $$->addr.type = PF_ADDR_RTLABEL; 2943 if (strlcpy($$->addr.v.rtlabelname, $2, 2944 sizeof($$->addr.v.rtlabelname)) >= 2945 sizeof($$->addr.v.rtlabelname)) { 2946 yyerror("route label too long, max %zd chars", 2947 sizeof($$->addr.v.rtlabelname) - 1); 2948 free($2); 2949 free($$); 2950 YYERROR; 2951 } 2952 $$->next = NULL; 2953 $$->tail = $$; 2954 free($2); 2955 } 2956 ; 2957 2958 number : NUMBER 2959 | STRING { 2960 u_long ulval; 2961 2962 if (atoul($1, &ulval) == -1) { 2963 yyerror("%s is not a number", $1); 2964 free($1); 2965 YYERROR; 2966 } else 2967 $$ = ulval; 2968 free($1); 2969 } 2970 ; 2971 2972 dynaddr : '(' STRING ')' { 2973 int flags = 0; 2974 char *p, *op; 2975 2976 op = $2; 2977 if (!isalpha(op[0])) { 2978 yyerror("invalid interface name '%s'", op); 2979 free(op); 2980 YYERROR; 2981 } 2982 while ((p = strrchr($2, ':')) != NULL) { 2983 if (!strcmp(p+1, "network")) 2984 flags |= PFI_AFLAG_NETWORK; 2985 else if (!strcmp(p+1, "broadcast")) 2986 flags |= PFI_AFLAG_BROADCAST; 2987 else if (!strcmp(p+1, "peer")) 2988 flags |= PFI_AFLAG_PEER; 2989 else if (!strcmp(p+1, "0")) 2990 flags |= PFI_AFLAG_NOALIAS; 2991 else { 2992 yyerror("interface %s has bad modifier", 2993 $2); 2994 free(op); 2995 YYERROR; 2996 } 2997 *p = '\0'; 2998 } 2999 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { 3000 free(op); 3001 yyerror("illegal combination of " 3002 "interface modifiers"); 3003 YYERROR; 3004 } 3005 $$ = calloc(1, sizeof(struct node_host)); 3006 if ($$ == NULL) 3007 err(1, "address: calloc"); 3008 $$->af = 0; 3009 set_ipmask($$, 128); 3010 $$->addr.type = PF_ADDR_DYNIFTL; 3011 $$->addr.iflags = flags; 3012 if (strlcpy($$->addr.v.ifname, $2, 3013 sizeof($$->addr.v.ifname)) >= 3014 sizeof($$->addr.v.ifname)) { 3015 free(op); 3016 free($$); 3017 yyerror("interface name too long"); 3018 YYERROR; 3019 } 3020 free(op); 3021 $$->next = NULL; 3022 $$->tail = $$; 3023 } 3024 ; 3025 3026 portspec : port_item { $$ = $1; } 3027 | '{' optnl port_list '}' { $$ = $3; } 3028 ; 3029 3030 port_list : port_item optnl { $$ = $1; } 3031 | port_list comma port_item optnl { 3032 $1->tail->next = $3; 3033 $1->tail = $3; 3034 $$ = $1; 3035 } 3036 ; 3037 3038 port_item : portrange { 3039 $$ = calloc(1, sizeof(struct node_port)); 3040 if ($$ == NULL) 3041 err(1, "port_item: calloc"); 3042 $$->port[0] = $1.a; 3043 $$->port[1] = $1.b; 3044 if ($1.t) 3045 $$->op = PF_OP_RRG; 3046 else 3047 $$->op = PF_OP_EQ; 3048 $$->next = NULL; 3049 $$->tail = $$; 3050 } 3051 | unaryop portrange { 3052 if ($2.t) { 3053 yyerror("':' cannot be used with an other " 3054 "port operator"); 3055 YYERROR; 3056 } 3057 $$ = calloc(1, sizeof(struct node_port)); 3058 if ($$ == NULL) 3059 err(1, "port_item: calloc"); 3060 $$->port[0] = $2.a; 3061 $$->port[1] = $2.b; 3062 $$->op = $1; 3063 $$->next = NULL; 3064 $$->tail = $$; 3065 } 3066 | portrange PORTBINARY portrange { 3067 if ($1.t || $3.t) { 3068 yyerror("':' cannot be used with an other " 3069 "port operator"); 3070 YYERROR; 3071 } 3072 $$ = calloc(1, sizeof(struct node_port)); 3073 if ($$ == NULL) 3074 err(1, "port_item: calloc"); 3075 $$->port[0] = $1.a; 3076 $$->port[1] = $3.a; 3077 $$->op = $2; 3078 $$->next = NULL; 3079 $$->tail = $$; 3080 } 3081 ; 3082 3083 portplain : numberstring { 3084 if (parseport($1, &$$, 0) == -1) { 3085 free($1); 3086 YYERROR; 3087 } 3088 free($1); 3089 } 3090 ; 3091 3092 portrange : numberstring { 3093 if (parseport($1, &$$, PPORT_RANGE) == -1) { 3094 free($1); 3095 YYERROR; 3096 } 3097 free($1); 3098 } 3099 ; 3100 3101 uids : uid_item { $$ = $1; } 3102 | '{' optnl uid_list '}' { $$ = $3; } 3103 ; 3104 3105 uid_list : uid_item optnl { $$ = $1; } 3106 | uid_list comma uid_item optnl { 3107 $1->tail->next = $3; 3108 $1->tail = $3; 3109 $$ = $1; 3110 } 3111 ; 3112 3113 uid_item : uid { 3114 $$ = calloc(1, sizeof(struct node_uid)); 3115 if ($$ == NULL) 3116 err(1, "uid_item: calloc"); 3117 $$->uid[0] = $1; 3118 $$->uid[1] = $1; 3119 $$->op = PF_OP_EQ; 3120 $$->next = NULL; 3121 $$->tail = $$; 3122 } 3123 | unaryop uid { 3124 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3125 yyerror("user unknown requires operator = or " 3126 "!="); 3127 YYERROR; 3128 } 3129 $$ = calloc(1, sizeof(struct node_uid)); 3130 if ($$ == NULL) 3131 err(1, "uid_item: calloc"); 3132 $$->uid[0] = $2; 3133 $$->uid[1] = $2; 3134 $$->op = $1; 3135 $$->next = NULL; 3136 $$->tail = $$; 3137 } 3138 | uid PORTBINARY uid { 3139 if ($1 == UID_MAX || $3 == UID_MAX) { 3140 yyerror("user unknown requires operator = or " 3141 "!="); 3142 YYERROR; 3143 } 3144 $$ = calloc(1, sizeof(struct node_uid)); 3145 if ($$ == NULL) 3146 err(1, "uid_item: calloc"); 3147 $$->uid[0] = $1; 3148 $$->uid[1] = $3; 3149 $$->op = $2; 3150 $$->next = NULL; 3151 $$->tail = $$; 3152 } 3153 ; 3154 3155 uid : STRING { 3156 if (!strcmp($1, "unknown")) 3157 $$ = UID_MAX; 3158 else { 3159 struct passwd *pw; 3160 3161 if ((pw = getpwnam($1)) == NULL) { 3162 yyerror("unknown user %s", $1); 3163 free($1); 3164 YYERROR; 3165 } 3166 $$ = pw->pw_uid; 3167 } 3168 free($1); 3169 } 3170 | NUMBER { 3171 if ($1 < 0 || $1 >= UID_MAX) { 3172 yyerror("illegal uid value %" PRId64, $1); 3173 YYERROR; 3174 } 3175 $$ = $1; 3176 } 3177 ; 3178 3179 gids : gid_item { $$ = $1; } 3180 | '{' optnl gid_list '}' { $$ = $3; } 3181 ; 3182 3183 gid_list : gid_item optnl { $$ = $1; } 3184 | gid_list comma gid_item optnl { 3185 $1->tail->next = $3; 3186 $1->tail = $3; 3187 $$ = $1; 3188 } 3189 ; 3190 3191 gid_item : gid { 3192 $$ = calloc(1, sizeof(struct node_gid)); 3193 if ($$ == NULL) 3194 err(1, "gid_item: calloc"); 3195 $$->gid[0] = $1; 3196 $$->gid[1] = $1; 3197 $$->op = PF_OP_EQ; 3198 $$->next = NULL; 3199 $$->tail = $$; 3200 } 3201 | unaryop gid { 3202 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3203 yyerror("group unknown requires operator = or " 3204 "!="); 3205 YYERROR; 3206 } 3207 $$ = calloc(1, sizeof(struct node_gid)); 3208 if ($$ == NULL) 3209 err(1, "gid_item: calloc"); 3210 $$->gid[0] = $2; 3211 $$->gid[1] = $2; 3212 $$->op = $1; 3213 $$->next = NULL; 3214 $$->tail = $$; 3215 } 3216 | gid PORTBINARY gid { 3217 if ($1 == GID_MAX || $3 == GID_MAX) { 3218 yyerror("group unknown requires operator = or " 3219 "!="); 3220 YYERROR; 3221 } 3222 $$ = calloc(1, sizeof(struct node_gid)); 3223 if ($$ == NULL) 3224 err(1, "gid_item: calloc"); 3225 $$->gid[0] = $1; 3226 $$->gid[1] = $3; 3227 $$->op = $2; 3228 $$->next = NULL; 3229 $$->tail = $$; 3230 } 3231 ; 3232 3233 gid : STRING { 3234 if (!strcmp($1, "unknown")) 3235 $$ = GID_MAX; 3236 else { 3237 struct group *grp; 3238 3239 if ((grp = getgrnam($1)) == NULL) { 3240 yyerror("unknown group %s", $1); 3241 free($1); 3242 YYERROR; 3243 } 3244 $$ = grp->gr_gid; 3245 } 3246 free($1); 3247 } 3248 | NUMBER { 3249 if ($1 < 0 || $1 >= GID_MAX) { 3250 yyerror("illegal gid value %" PRId64, $1); 3251 YYERROR; 3252 } 3253 $$ = $1; 3254 } 3255 ; 3256 3257 flag : STRING { 3258 int f; 3259 3260 if ((f = parse_flags($1)) < 0) { 3261 yyerror("bad flags %s", $1); 3262 free($1); 3263 YYERROR; 3264 } 3265 free($1); 3266 $$.b1 = f; 3267 } 3268 ; 3269 3270 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 3271 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 3272 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; } 3273 ; 3274 3275 icmpspec : ICMPTYPE icmp_item { $$ = $2; } 3276 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; } 3277 | ICMP6TYPE icmp6_item { $$ = $2; } 3278 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; } 3279 ; 3280 3281 icmp_list : icmp_item optnl { $$ = $1; } 3282 | icmp_list comma icmp_item optnl { 3283 $1->tail->next = $3; 3284 $1->tail = $3; 3285 $$ = $1; 3286 } 3287 ; 3288 3289 icmp6_list : icmp6_item optnl { $$ = $1; } 3290 | icmp6_list comma icmp6_item optnl { 3291 $1->tail->next = $3; 3292 $1->tail = $3; 3293 $$ = $1; 3294 } 3295 ; 3296 3297 icmp_item : icmptype { 3298 $$ = calloc(1, sizeof(struct node_icmp)); 3299 if ($$ == NULL) 3300 err(1, "icmp_item: calloc"); 3301 $$->type = $1; 3302 $$->code = 0; 3303 $$->proto = IPPROTO_ICMP; 3304 $$->next = NULL; 3305 $$->tail = $$; 3306 } 3307 | icmptype CODE STRING { 3308 const struct icmpcodeent *p; 3309 3310 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) { 3311 yyerror("unknown icmp-code %s", $3); 3312 free($3); 3313 YYERROR; 3314 } 3315 3316 free($3); 3317 $$ = calloc(1, sizeof(struct node_icmp)); 3318 if ($$ == NULL) 3319 err(1, "icmp_item: calloc"); 3320 $$->type = $1; 3321 $$->code = p->code + 1; 3322 $$->proto = IPPROTO_ICMP; 3323 $$->next = NULL; 3324 $$->tail = $$; 3325 } 3326 | icmptype CODE NUMBER { 3327 if ($3 < 0 || $3 > 255) { 3328 yyerror("illegal icmp-code %" PRId64, $3); 3329 YYERROR; 3330 } 3331 $$ = calloc(1, sizeof(struct node_icmp)); 3332 if ($$ == NULL) 3333 err(1, "icmp_item: calloc"); 3334 $$->type = $1; 3335 $$->code = $3 + 1; 3336 $$->proto = IPPROTO_ICMP; 3337 $$->next = NULL; 3338 $$->tail = $$; 3339 } 3340 ; 3341 3342 icmp6_item : icmp6type { 3343 $$ = calloc(1, sizeof(struct node_icmp)); 3344 if ($$ == NULL) 3345 err(1, "icmp_item: calloc"); 3346 $$->type = $1; 3347 $$->code = 0; 3348 $$->proto = IPPROTO_ICMPV6; 3349 $$->next = NULL; 3350 $$->tail = $$; 3351 } 3352 | icmp6type CODE STRING { 3353 const struct icmpcodeent *p; 3354 3355 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) { 3356 yyerror("unknown icmp6-code %s", $3); 3357 free($3); 3358 YYERROR; 3359 } 3360 free($3); 3361 3362 $$ = calloc(1, sizeof(struct node_icmp)); 3363 if ($$ == NULL) 3364 err(1, "icmp_item: calloc"); 3365 $$->type = $1; 3366 $$->code = p->code + 1; 3367 $$->proto = IPPROTO_ICMPV6; 3368 $$->next = NULL; 3369 $$->tail = $$; 3370 } 3371 | icmp6type CODE NUMBER { 3372 if ($3 < 0 || $3 > 255) { 3373 yyerror("illegal icmp-code %" PRId64, $3); 3374 YYERROR; 3375 } 3376 $$ = calloc(1, sizeof(struct node_icmp)); 3377 if ($$ == NULL) 3378 err(1, "icmp_item: calloc"); 3379 $$->type = $1; 3380 $$->code = $3 + 1; 3381 $$->proto = IPPROTO_ICMPV6; 3382 $$->next = NULL; 3383 $$->tail = $$; 3384 } 3385 ; 3386 3387 icmptype : STRING { 3388 const struct icmptypeent *p; 3389 3390 if ((p = geticmptypebyname($1, AF_INET)) == NULL) { 3391 yyerror("unknown icmp-type %s", $1); 3392 free($1); 3393 YYERROR; 3394 } 3395 $$ = p->type + 1; 3396 free($1); 3397 } 3398 | NUMBER { 3399 if ($1 < 0 || $1 > 255) { 3400 yyerror("illegal icmp-type %" PRId64, $1); 3401 YYERROR; 3402 } 3403 $$ = $1 + 1; 3404 } 3405 ; 3406 3407 icmp6type : STRING { 3408 const struct icmptypeent *p; 3409 3410 if ((p = geticmptypebyname($1, AF_INET6)) == 3411 NULL) { 3412 yyerror("unknown icmp6-type %s", $1); 3413 free($1); 3414 YYERROR; 3415 } 3416 $$ = p->type + 1; 3417 free($1); 3418 } 3419 | NUMBER { 3420 if ($1 < 0 || $1 > 255) { 3421 yyerror("illegal icmp6-type %" PRId64, $1); 3422 YYERROR; 3423 } 3424 $$ = $1 + 1; 3425 } 3426 ; 3427 3428 tos : STRING { 3429 if (!strcmp($1, "lowdelay")) 3430 $$ = IPTOS_LOWDELAY; 3431 else if (!strcmp($1, "throughput")) 3432 $$ = IPTOS_THROUGHPUT; 3433 else if (!strcmp($1, "reliability")) 3434 $$ = IPTOS_RELIABILITY; 3435 else if ($1[0] == '0' && $1[1] == 'x') 3436 $$ = strtoul($1, NULL, 16); 3437 else 3438 $$ = 0; /* flag bad argument */ 3439 if (!$$ || $$ > 255) { 3440 yyerror("illegal tos value %s", $1); 3441 free($1); 3442 YYERROR; 3443 } 3444 free($1); 3445 } 3446 | NUMBER { 3447 $$ = $1; 3448 if (!$$ || $$ > 255) { 3449 yyerror("illegal tos value %" PRId64, $1); 3450 YYERROR; 3451 } 3452 } 3453 ; 3454 3455 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; } 3456 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; } 3457 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; } 3458 ; 3459 3460 statelock : IFBOUND { 3461 $$ = PFRULE_IFBOUND; 3462 } 3463 | FLOATING { 3464 $$ = 0; 3465 } 3466 ; 3467 3468 keep : NO STATE { 3469 $$.action = 0; 3470 $$.options = NULL; 3471 } 3472 | KEEP STATE state_opt_spec { 3473 $$.action = PF_STATE_NORMAL; 3474 $$.options = $3; 3475 } 3476 | MODULATE STATE state_opt_spec { 3477 $$.action = PF_STATE_MODULATE; 3478 $$.options = $3; 3479 } 3480 | SYNPROXY STATE state_opt_spec { 3481 $$.action = PF_STATE_SYNPROXY; 3482 $$.options = $3; 3483 } 3484 ; 3485 3486 flush : /* empty */ { $$ = 0; } 3487 | FLUSH { $$ = PF_FLUSH; } 3488 | FLUSH GLOBAL { 3489 $$ = PF_FLUSH | PF_FLUSH_GLOBAL; 3490 } 3491 ; 3492 3493 state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 3494 | /* empty */ { $$ = NULL; } 3495 ; 3496 3497 state_opt_list : state_opt_item { $$ = $1; } 3498 | state_opt_list comma state_opt_item { 3499 $1->tail->next = $3; 3500 $1->tail = $3; 3501 $$ = $1; 3502 } 3503 ; 3504 3505 state_opt_item : MAXIMUM NUMBER { 3506 if ($2 < 0 || $2 > UINT_MAX) { 3507 yyerror("only positive values permitted"); 3508 YYERROR; 3509 } 3510 $$ = calloc(1, sizeof(struct node_state_opt)); 3511 if ($$ == NULL) 3512 err(1, "state_opt_item: calloc"); 3513 $$->type = PF_STATE_OPT_MAX; 3514 $$->data.max_states = $2; 3515 $$->next = NULL; 3516 $$->tail = $$; 3517 } 3518 | NOSYNC { 3519 $$ = calloc(1, sizeof(struct node_state_opt)); 3520 if ($$ == NULL) 3521 err(1, "state_opt_item: calloc"); 3522 $$->type = PF_STATE_OPT_NOSYNC; 3523 $$->next = NULL; 3524 $$->tail = $$; 3525 } 3526 | MAXSRCSTATES NUMBER { 3527 if ($2 < 0 || $2 > UINT_MAX) { 3528 yyerror("only positive values permitted"); 3529 YYERROR; 3530 } 3531 $$ = calloc(1, sizeof(struct node_state_opt)); 3532 if ($$ == NULL) 3533 err(1, "state_opt_item: calloc"); 3534 $$->type = PF_STATE_OPT_MAX_SRC_STATES; 3535 $$->data.max_src_states = $2; 3536 $$->next = NULL; 3537 $$->tail = $$; 3538 } 3539 | MAXSRCCONN NUMBER { 3540 if ($2 < 0 || $2 > UINT_MAX) { 3541 yyerror("only positive values permitted"); 3542 YYERROR; 3543 } 3544 $$ = calloc(1, sizeof(struct node_state_opt)); 3545 if ($$ == NULL) 3546 err(1, "state_opt_item: calloc"); 3547 $$->type = PF_STATE_OPT_MAX_SRC_CONN; 3548 $$->data.max_src_conn = $2; 3549 $$->next = NULL; 3550 $$->tail = $$; 3551 } 3552 | MAXSRCCONNRATE NUMBER '/' NUMBER { 3553 if ($2 < 0 || $2 > UINT_MAX || 3554 $4 < 0 || $4 > UINT_MAX) { 3555 yyerror("only positive values permitted"); 3556 YYERROR; 3557 } 3558 $$ = calloc(1, sizeof(struct node_state_opt)); 3559 if ($$ == NULL) 3560 err(1, "state_opt_item: calloc"); 3561 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE; 3562 $$->data.max_src_conn_rate.limit = $2; 3563 $$->data.max_src_conn_rate.seconds = $4; 3564 $$->next = NULL; 3565 $$->tail = $$; 3566 } 3567 | OVERLOAD '<' STRING '>' flush { 3568 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 3569 yyerror("table name '%s' too long", $3); 3570 free($3); 3571 YYERROR; 3572 } 3573 $$ = calloc(1, sizeof(struct node_state_opt)); 3574 if ($$ == NULL) 3575 err(1, "state_opt_item: calloc"); 3576 if (strlcpy($$->data.overload.tblname, $3, 3577 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE) 3578 errx(1, "state_opt_item: strlcpy"); 3579 free($3); 3580 $$->type = PF_STATE_OPT_OVERLOAD; 3581 $$->data.overload.flush = $5; 3582 $$->next = NULL; 3583 $$->tail = $$; 3584 } 3585 | MAXSRCNODES NUMBER { 3586 if ($2 < 0 || $2 > UINT_MAX) { 3587 yyerror("only positive values permitted"); 3588 YYERROR; 3589 } 3590 $$ = calloc(1, sizeof(struct node_state_opt)); 3591 if ($$ == NULL) 3592 err(1, "state_opt_item: calloc"); 3593 $$->type = PF_STATE_OPT_MAX_SRC_NODES; 3594 $$->data.max_src_nodes = $2; 3595 $$->next = NULL; 3596 $$->tail = $$; 3597 } 3598 | PICKUPS { 3599 $$ = calloc(1, sizeof(struct node_state_opt)); 3600 if ($$ == NULL) 3601 err(1, "state_opt_item: calloc"); 3602 $$->type = PF_STATE_OPT_PICKUPS; 3603 $$->data.pickup_mode = PF_PICKUPS_ENABLED; 3604 $$->next = NULL; 3605 $$->tail = $$; 3606 } 3607 | NOPICKUPS { 3608 $$ = calloc(1, sizeof(struct node_state_opt)); 3609 if ($$ == NULL) 3610 err(1, "state_opt_item: calloc"); 3611 $$->type = PF_STATE_OPT_PICKUPS; 3612 $$->data.pickup_mode = PF_PICKUPS_DISABLED; 3613 $$->next = NULL; 3614 $$->tail = $$; 3615 } 3616 | HASHONLY { 3617 $$ = calloc(1, sizeof(struct node_state_opt)); 3618 if ($$ == NULL) 3619 err(1, "state_opt_item: calloc"); 3620 $$->type = PF_STATE_OPT_PICKUPS; 3621 $$->data.pickup_mode = PF_PICKUPS_HASHONLY; 3622 $$->next = NULL; 3623 $$->tail = $$; 3624 } 3625 | sourcetrack { 3626 $$ = calloc(1, sizeof(struct node_state_opt)); 3627 if ($$ == NULL) 3628 err(1, "state_opt_item: calloc"); 3629 $$->type = PF_STATE_OPT_SRCTRACK; 3630 $$->data.src_track = $1; 3631 $$->next = NULL; 3632 $$->tail = $$; 3633 } 3634 | statelock { 3635 $$ = calloc(1, sizeof(struct node_state_opt)); 3636 if ($$ == NULL) 3637 err(1, "state_opt_item: calloc"); 3638 $$->type = PF_STATE_OPT_STATELOCK; 3639 $$->data.statelock = $1; 3640 $$->next = NULL; 3641 $$->tail = $$; 3642 } 3643 | SLOPPY { 3644 $$ = calloc(1, sizeof(struct node_state_opt)); 3645 if ($$ == NULL) 3646 err(1, "state_opt_item: calloc"); 3647 $$->type = PF_STATE_OPT_SLOPPY; 3648 $$->next = NULL; 3649 $$->tail = $$; 3650 } 3651 | STRING NUMBER { 3652 int i; 3653 3654 if ($2 < 0 || $2 > UINT_MAX) { 3655 yyerror("only positive values permitted"); 3656 YYERROR; 3657 } 3658 for (i = 0; pf_timeouts[i].name && 3659 strcmp(pf_timeouts[i].name, $1); ++i) 3660 ; /* nothing */ 3661 if (!pf_timeouts[i].name) { 3662 yyerror("illegal timeout name %s", $1); 3663 free($1); 3664 YYERROR; 3665 } 3666 if (strchr(pf_timeouts[i].name, '.') == NULL) { 3667 yyerror("illegal state timeout %s", $1); 3668 free($1); 3669 YYERROR; 3670 } 3671 free($1); 3672 $$ = calloc(1, sizeof(struct node_state_opt)); 3673 if ($$ == NULL) 3674 err(1, "state_opt_item: calloc"); 3675 $$->type = PF_STATE_OPT_TIMEOUT; 3676 $$->data.timeout.number = pf_timeouts[i].timeout; 3677 $$->data.timeout.seconds = $2; 3678 $$->next = NULL; 3679 $$->tail = $$; 3680 } 3681 ; 3682 3683 label : LABEL STRING { 3684 $$ = $2; 3685 } 3686 ; 3687 3688 qname : QUEUE STRING { 3689 $$.qname = $2; 3690 $$.pqname = NULL; 3691 } 3692 | QUEUE '(' STRING ')' { 3693 $$.qname = $3; 3694 $$.pqname = NULL; 3695 } 3696 | QUEUE '(' STRING comma STRING ')' { 3697 $$.qname = $3; 3698 $$.pqname = $5; 3699 } 3700 ; 3701 3702 no : /* empty */ { $$ = 0; } 3703 | NO { $$ = 1; } 3704 ; 3705 3706 portstar : numberstring { 3707 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) { 3708 free($1); 3709 YYERROR; 3710 } 3711 free($1); 3712 } 3713 ; 3714 3715 redirspec : host { $$ = $1; } 3716 | '{' optnl redir_host_list '}' { $$ = $3; } 3717 ; 3718 3719 redir_host_list : host optnl { $$ = $1; } 3720 | redir_host_list comma host optnl { 3721 $1->tail->next = $3; 3722 $1->tail = $3->tail; 3723 $$ = $1; 3724 } 3725 ; 3726 3727 redirpool : /* empty */ { $$ = NULL; } 3728 | ARROW redirspec { 3729 $$ = calloc(1, sizeof(struct redirection)); 3730 if ($$ == NULL) 3731 err(1, "redirection: calloc"); 3732 $$->host = $2; 3733 $$->rport.a = $$->rport.b = $$->rport.t = 0; 3734 } 3735 | ARROW redirspec PORT portstar { 3736 $$ = calloc(1, sizeof(struct redirection)); 3737 if ($$ == NULL) 3738 err(1, "redirection: calloc"); 3739 $$->host = $2; 3740 $$->rport = $4; 3741 } 3742 ; 3743 3744 hashkey : /* empty */ 3745 { 3746 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 3747 if ($$ == NULL) 3748 err(1, "hashkey: calloc"); 3749 $$->key32[0] = arc4random(); 3750 $$->key32[1] = arc4random(); 3751 $$->key32[2] = arc4random(); 3752 $$->key32[3] = arc4random(); 3753 } 3754 | string 3755 { 3756 if (!strncmp($1, "0x", 2)) { 3757 if (strlen($1) != 34) { 3758 free($1); 3759 yyerror("hex key must be 128 bits " 3760 "(32 hex digits) long"); 3761 YYERROR; 3762 } 3763 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 3764 if ($$ == NULL) 3765 err(1, "hashkey: calloc"); 3766 3767 if (sscanf($1, "0x%8x%8x%8x%8x", 3768 &$$->key32[0], &$$->key32[1], 3769 &$$->key32[2], &$$->key32[3]) != 4) { 3770 free($$); 3771 free($1); 3772 yyerror("invalid hex key"); 3773 YYERROR; 3774 } 3775 } else { 3776 MD5_CTX context; 3777 3778 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 3779 if ($$ == NULL) 3780 err(1, "hashkey: calloc"); 3781 MD5Init(&context); 3782 MD5Update(&context, (unsigned char *)$1, 3783 strlen($1)); 3784 MD5Final((unsigned char *)$$, &context); 3785 $$->key32[0] = htonl($$->key32[0]); 3786 $$->key32[1] = htonl($$->key32[1]); 3787 $$->key32[2] = htonl($$->key32[2]); 3788 $$->key32[3] = htonl($$->key32[3]); 3789 } 3790 free($1); 3791 } 3792 ; 3793 3794 pool_opts : { bzero(&pool_opts, sizeof pool_opts); } 3795 pool_opts_l 3796 { $$ = pool_opts; } 3797 | /* empty */ { 3798 bzero(&pool_opts, sizeof pool_opts); 3799 $$ = pool_opts; 3800 } 3801 ; 3802 3803 pool_opts_l : pool_opts_l pool_opt 3804 | pool_opt 3805 ; 3806 3807 pool_opt : BITMASK { 3808 if (pool_opts.type) { 3809 yyerror("pool type cannot be redefined"); 3810 YYERROR; 3811 } 3812 pool_opts.type = PF_POOL_BITMASK; 3813 } 3814 | RANDOM { 3815 if (pool_opts.type) { 3816 yyerror("pool type cannot be redefined"); 3817 YYERROR; 3818 } 3819 pool_opts.type = PF_POOL_RANDOM; 3820 } 3821 | SOURCEHASH hashkey { 3822 if (pool_opts.type) { 3823 yyerror("pool type cannot be redefined"); 3824 YYERROR; 3825 } 3826 pool_opts.type = PF_POOL_SRCHASH; 3827 pool_opts.key = $2; 3828 } 3829 | ROUNDROBIN { 3830 if (pool_opts.type) { 3831 yyerror("pool type cannot be redefined"); 3832 YYERROR; 3833 } 3834 pool_opts.type = PF_POOL_ROUNDROBIN; 3835 } 3836 | STATICPORT { 3837 if (pool_opts.staticport) { 3838 yyerror("static-port cannot be redefined"); 3839 YYERROR; 3840 } 3841 pool_opts.staticport = 1; 3842 } 3843 | STICKYADDRESS { 3844 if (filter_opts.marker & POM_STICKYADDRESS) { 3845 yyerror("sticky-address cannot be redefined"); 3846 YYERROR; 3847 } 3848 pool_opts.marker |= POM_STICKYADDRESS; 3849 pool_opts.opts |= PF_POOL_STICKYADDR; 3850 } 3851 ; 3852 3853 redirection : /* empty */ { $$ = NULL; } 3854 | ARROW host { 3855 $$ = calloc(1, sizeof(struct redirection)); 3856 if ($$ == NULL) 3857 err(1, "redirection: calloc"); 3858 $$->host = $2; 3859 $$->rport.a = $$->rport.b = $$->rport.t = 0; 3860 } 3861 | ARROW host PORT portstar { 3862 $$ = calloc(1, sizeof(struct redirection)); 3863 if ($$ == NULL) 3864 err(1, "redirection: calloc"); 3865 $$->host = $2; 3866 $$->rport = $4; 3867 } 3868 ; 3869 3870 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; } 3871 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; } 3872 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; } 3873 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; } 3874 ; 3875 3876 nataction : no NAT natpasslog { 3877 if ($1 && $3.b1) { 3878 yyerror("\"pass\" not valid with \"no\""); 3879 YYERROR; 3880 } 3881 if ($1) 3882 $$.b1 = PF_NONAT; 3883 else 3884 $$.b1 = PF_NAT; 3885 $$.b2 = $3.b1; 3886 $$.w = $3.b2; 3887 $$.w2 = $3.w2; 3888 } 3889 | no RDR natpasslog { 3890 if ($1 && $3.b1) { 3891 yyerror("\"pass\" not valid with \"no\""); 3892 YYERROR; 3893 } 3894 if ($1) 3895 $$.b1 = PF_NORDR; 3896 else 3897 $$.b1 = PF_RDR; 3898 $$.b2 = $3.b1; 3899 $$.w = $3.b2; 3900 $$.w2 = $3.w2; 3901 } 3902 ; 3903 3904 natrule : nataction interface af proto fromto tag tagged rtable 3905 redirpool pool_opts 3906 { 3907 struct pf_rule r; 3908 3909 if (check_rulestate(PFCTL_STATE_NAT)) 3910 YYERROR; 3911 3912 memset(&r, 0, sizeof(r)); 3913 3914 r.action = $1.b1; 3915 r.natpass = $1.b2; 3916 r.log = $1.w; 3917 r.logif = $1.w2; 3918 r.af = $3; 3919 3920 if (!r.af) { 3921 if ($5.src.host && $5.src.host->af && 3922 !$5.src.host->ifindex) 3923 r.af = $5.src.host->af; 3924 else if ($5.dst.host && $5.dst.host->af && 3925 !$5.dst.host->ifindex) 3926 r.af = $5.dst.host->af; 3927 } 3928 3929 if ($6 != NULL) 3930 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >= 3931 PF_TAG_NAME_SIZE) { 3932 yyerror("tag too long, max %u chars", 3933 PF_TAG_NAME_SIZE - 1); 3934 YYERROR; 3935 } 3936 3937 if ($7.name) 3938 if (strlcpy(r.match_tagname, $7.name, 3939 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 3940 yyerror("tag too long, max %u chars", 3941 PF_TAG_NAME_SIZE - 1); 3942 YYERROR; 3943 } 3944 r.match_tag_not = $7.neg; 3945 r.rtableid = $8; 3946 3947 if (r.action == PF_NONAT || r.action == PF_NORDR) { 3948 if ($9 != NULL) { 3949 yyerror("translation rule with 'no' " 3950 "does not need '->'"); 3951 YYERROR; 3952 } 3953 } else { 3954 if ($9 == NULL || $9->host == NULL) { 3955 yyerror("translation rule requires '-> " 3956 "address'"); 3957 YYERROR; 3958 } 3959 if (!r.af && ! $9->host->ifindex) 3960 r.af = $9->host->af; 3961 3962 remove_invalid_hosts(&$9->host, &r.af); 3963 if (invalid_redirect($9->host, r.af)) 3964 YYERROR; 3965 if (check_netmask($9->host, r.af)) 3966 YYERROR; 3967 3968 r.rpool.proxy_port[0] = ntohs($9->rport.a); 3969 3970 switch (r.action) { 3971 case PF_RDR: 3972 if (!$9->rport.b && $9->rport.t && 3973 $5.dst.port != NULL) { 3974 r.rpool.proxy_port[1] = 3975 ntohs($9->rport.a) + 3976 (ntohs( 3977 $5.dst.port->port[1]) - 3978 ntohs( 3979 $5.dst.port->port[0])); 3980 } else 3981 r.rpool.proxy_port[1] = 3982 ntohs($9->rport.b); 3983 break; 3984 case PF_NAT: 3985 r.rpool.proxy_port[1] = 3986 ntohs($9->rport.b); 3987 if (!r.rpool.proxy_port[0] && 3988 !r.rpool.proxy_port[1]) { 3989 r.rpool.proxy_port[0] = 3990 PF_NAT_PROXY_PORT_LOW; 3991 r.rpool.proxy_port[1] = 3992 PF_NAT_PROXY_PORT_HIGH; 3993 } else if (!r.rpool.proxy_port[1]) 3994 r.rpool.proxy_port[1] = 3995 r.rpool.proxy_port[0]; 3996 break; 3997 default: 3998 break; 3999 } 4000 4001 r.rpool.opts = $10.type; 4002 if ((r.rpool.opts & PF_POOL_TYPEMASK) == 4003 PF_POOL_NONE && ($9->host->next != NULL || 4004 $9->host->addr.type == PF_ADDR_TABLE || 4005 DYNIF_MULTIADDR($9->host->addr))) 4006 r.rpool.opts = PF_POOL_ROUNDROBIN; 4007 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4008 PF_POOL_ROUNDROBIN && 4009 disallow_table($9->host, "tables are only " 4010 "supported in round-robin redirection " 4011 "pools")) 4012 YYERROR; 4013 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4014 PF_POOL_ROUNDROBIN && 4015 disallow_alias($9->host, "interface (%s) " 4016 "is only supported in round-robin " 4017 "redirection pools")) 4018 YYERROR; 4019 if ($9->host->next != NULL) { 4020 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4021 PF_POOL_ROUNDROBIN) { 4022 yyerror("only round-robin " 4023 "valid for multiple " 4024 "redirection addresses"); 4025 YYERROR; 4026 } 4027 } 4028 } 4029 4030 if ($10.key != NULL) 4031 memcpy(&r.rpool.key, $10.key, 4032 sizeof(struct pf_poolhashkey)); 4033 4034 if ($10.opts) 4035 r.rpool.opts |= $10.opts; 4036 4037 if ($10.staticport) { 4038 if (r.action != PF_NAT) { 4039 yyerror("the 'static-port' option is " 4040 "only valid with nat rules"); 4041 YYERROR; 4042 } 4043 if (r.rpool.proxy_port[0] != 4044 PF_NAT_PROXY_PORT_LOW && 4045 r.rpool.proxy_port[1] != 4046 PF_NAT_PROXY_PORT_HIGH) { 4047 yyerror("the 'static-port' option can't" 4048 " be used when specifying a port" 4049 " range"); 4050 YYERROR; 4051 } 4052 r.rpool.proxy_port[0] = 0; 4053 r.rpool.proxy_port[1] = 0; 4054 } 4055 4056 expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4, 4057 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 4058 $5.dst.port, 0, 0, 0, ""); 4059 free($9); 4060 } 4061 ; 4062 4063 binatrule : no BINAT natpasslog interface af proto FROM host toipspec tag 4064 tagged rtable redirection 4065 { 4066 struct pf_rule binat; 4067 struct pf_pooladdr *pa; 4068 4069 if (check_rulestate(PFCTL_STATE_NAT)) 4070 YYERROR; 4071 if (disallow_urpf_failed($9, "\"urpf-failed\" is not " 4072 "permitted as a binat destination")) 4073 YYERROR; 4074 4075 memset(&binat, 0, sizeof(binat)); 4076 4077 if ($1 && $3.b1) { 4078 yyerror("\"pass\" not valid with \"no\""); 4079 YYERROR; 4080 } 4081 if ($1) 4082 binat.action = PF_NOBINAT; 4083 else 4084 binat.action = PF_BINAT; 4085 binat.natpass = $3.b1; 4086 binat.log = $3.b2; 4087 binat.logif = $3.w2; 4088 binat.af = $5; 4089 if (!binat.af && $8 != NULL && $8->af) 4090 binat.af = $8->af; 4091 if (!binat.af && $9 != NULL && $9->af) 4092 binat.af = $9->af; 4093 4094 if (!binat.af && $13 != NULL && $13->host) 4095 binat.af = $13->host->af; 4096 if (!binat.af) { 4097 yyerror("address family (inet/inet6) " 4098 "undefined"); 4099 YYERROR; 4100 } 4101 4102 if ($4 != NULL) { 4103 memcpy(binat.ifname, $4->ifname, 4104 sizeof(binat.ifname)); 4105 binat.ifnot = $4->not; 4106 free($4); 4107 } 4108 4109 if ($10 != NULL) 4110 if (strlcpy(binat.tagname, $10, 4111 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4112 yyerror("tag too long, max %u chars", 4113 PF_TAG_NAME_SIZE - 1); 4114 YYERROR; 4115 } 4116 if ($11.name) 4117 if (strlcpy(binat.match_tagname, $11.name, 4118 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4119 yyerror("tag too long, max %u chars", 4120 PF_TAG_NAME_SIZE - 1); 4121 YYERROR; 4122 } 4123 binat.match_tag_not = $11.neg; 4124 binat.rtableid = $12; 4125 4126 if ($6 != NULL) { 4127 binat.proto = $6->proto; 4128 free($6); 4129 } 4130 4131 if ($8 != NULL && disallow_table($8, "invalid use of " 4132 "table <%s> as the source address of a binat rule")) 4133 YYERROR; 4134 if ($8 != NULL && disallow_alias($8, "invalid use of " 4135 "interface (%s) as the source address of a binat " 4136 "rule")) 4137 YYERROR; 4138 if ($13 != NULL && $13->host != NULL && disallow_table( 4139 $13->host, "invalid use of table <%s> as the " 4140 "redirect address of a binat rule")) 4141 YYERROR; 4142 if ($13 != NULL && $13->host != NULL && disallow_alias( 4143 $13->host, "invalid use of interface (%s) as the " 4144 "redirect address of a binat rule")) 4145 YYERROR; 4146 4147 if ($8 != NULL) { 4148 if ($8->next) { 4149 yyerror("multiple binat ip addresses"); 4150 YYERROR; 4151 } 4152 if ($8->addr.type == PF_ADDR_DYNIFTL) 4153 $8->af = binat.af; 4154 if ($8->af != binat.af) { 4155 yyerror("binat ip versions must match"); 4156 YYERROR; 4157 } 4158 if (check_netmask($8, binat.af)) 4159 YYERROR; 4160 memcpy(&binat.src.addr, &$8->addr, 4161 sizeof(binat.src.addr)); 4162 free($8); 4163 } 4164 if ($9 != NULL) { 4165 if ($9->next) { 4166 yyerror("multiple binat ip addresses"); 4167 YYERROR; 4168 } 4169 if ($9->af != binat.af && $9->af) { 4170 yyerror("binat ip versions must match"); 4171 YYERROR; 4172 } 4173 if (check_netmask($9, binat.af)) 4174 YYERROR; 4175 memcpy(&binat.dst.addr, &$9->addr, 4176 sizeof(binat.dst.addr)); 4177 binat.dst.neg = $9->not; 4178 free($9); 4179 } 4180 4181 if (binat.action == PF_NOBINAT) { 4182 if ($13 != NULL) { 4183 yyerror("'no binat' rule does not need" 4184 " '->'"); 4185 YYERROR; 4186 } 4187 } else { 4188 if ($13 == NULL || $13->host == NULL) { 4189 yyerror("'binat' rule requires" 4190 " '-> address'"); 4191 YYERROR; 4192 } 4193 4194 remove_invalid_hosts(&$13->host, &binat.af); 4195 if (invalid_redirect($13->host, binat.af)) 4196 YYERROR; 4197 if ($13->host->next != NULL) { 4198 yyerror("binat rule must redirect to " 4199 "a single address"); 4200 YYERROR; 4201 } 4202 if (check_netmask($13->host, binat.af)) 4203 YYERROR; 4204 4205 if (!PF_AZERO(&binat.src.addr.v.a.mask, 4206 binat.af) && 4207 !PF_AEQ(&binat.src.addr.v.a.mask, 4208 &$13->host->addr.v.a.mask, binat.af)) { 4209 yyerror("'binat' source mask and " 4210 "redirect mask must be the same"); 4211 YYERROR; 4212 } 4213 4214 TAILQ_INIT(&binat.rpool.list); 4215 pa = calloc(1, sizeof(struct pf_pooladdr)); 4216 if (pa == NULL) 4217 err(1, "binat: calloc"); 4218 pa->addr = $13->host->addr; 4219 pa->ifname[0] = 0; 4220 TAILQ_INSERT_TAIL(&binat.rpool.list, 4221 pa, entries); 4222 4223 free($13); 4224 } 4225 4226 pfctl_add_rule(pf, &binat, ""); 4227 } 4228 ; 4229 4230 tag : /* empty */ { $$ = NULL; } 4231 | TAG STRING { $$ = $2; } 4232 ; 4233 4234 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; } 4235 | not TAGGED string { $$.neg = $1; $$.name = $3; } 4236 ; 4237 4238 rtable : /* empty */ { $$ = -1; } 4239 | RTABLE NUMBER { 4240 $$ = $2; 4241 } 4242 ; 4243 4244 route_host : STRING { 4245 $$ = calloc(1, sizeof(struct node_host)); 4246 if ($$ == NULL) 4247 err(1, "route_host: calloc"); 4248 $$->ifname = $1; 4249 set_ipmask($$, 128); 4250 $$->next = NULL; 4251 $$->tail = $$; 4252 } 4253 | '(' STRING host ')' { 4254 $$ = $3; 4255 $$->ifname = $2; 4256 } 4257 ; 4258 4259 route_host_list : route_host optnl { $$ = $1; } 4260 | route_host_list comma route_host optnl { 4261 if ($1->af == 0) 4262 $1->af = $3->af; 4263 if ($1->af != $3->af) { 4264 yyerror("all pool addresses must be in the " 4265 "same address family"); 4266 YYERROR; 4267 } 4268 $1->tail->next = $3; 4269 $1->tail = $3->tail; 4270 $$ = $1; 4271 } 4272 ; 4273 4274 routespec : route_host { $$ = $1; } 4275 | '{' optnl route_host_list '}' { $$ = $3; } 4276 ; 4277 4278 route : /* empty */ { 4279 $$.host = NULL; 4280 $$.rt = 0; 4281 $$.pool_opts = 0; 4282 } 4283 | FASTROUTE { 4284 $$.host = NULL; 4285 $$.rt = PF_FASTROUTE; 4286 $$.pool_opts = 0; 4287 } 4288 | ROUTETO routespec pool_opts { 4289 $$.host = $2; 4290 $$.rt = PF_ROUTETO; 4291 $$.pool_opts = $3.type | $3.opts; 4292 if ($3.key != NULL) 4293 $$.key = $3.key; 4294 } 4295 | REPLYTO routespec pool_opts { 4296 $$.host = $2; 4297 $$.rt = PF_REPLYTO; 4298 $$.pool_opts = $3.type | $3.opts; 4299 if ($3.key != NULL) 4300 $$.key = $3.key; 4301 } 4302 | DUPTO routespec pool_opts { 4303 $$.host = $2; 4304 $$.rt = PF_DUPTO; 4305 $$.pool_opts = $3.type | $3.opts; 4306 if ($3.key != NULL) 4307 $$.key = $3.key; 4308 } 4309 ; 4310 4311 timeout_spec : STRING NUMBER 4312 { 4313 if (check_rulestate(PFCTL_STATE_OPTION)) { 4314 free($1); 4315 YYERROR; 4316 } 4317 if ($2 < 0 || $2 > UINT_MAX) { 4318 yyerror("only positive values permitted"); 4319 YYERROR; 4320 } 4321 if (pfctl_set_timeout(pf, $1, $2, 0) != 0) { 4322 yyerror("unknown timeout %s", $1); 4323 free($1); 4324 YYERROR; 4325 } 4326 free($1); 4327 } 4328 ; 4329 4330 timeout_list : timeout_list comma timeout_spec optnl 4331 | timeout_spec optnl 4332 ; 4333 4334 limit_spec : STRING NUMBER 4335 { 4336 if (check_rulestate(PFCTL_STATE_OPTION)) { 4337 free($1); 4338 YYERROR; 4339 } 4340 if ($2 < 0 || $2 > UINT_MAX) { 4341 yyerror("only positive values permitted"); 4342 YYERROR; 4343 } 4344 if (pfctl_set_limit(pf, $1, $2) != 0) { 4345 yyerror("unable to set limit %s %" PRId64, $1, $2); 4346 free($1); 4347 YYERROR; 4348 } 4349 free($1); 4350 } 4351 ; 4352 4353 limit_list : limit_list comma limit_spec optnl 4354 | limit_spec optnl 4355 ; 4356 4357 comma : ',' 4358 | /* empty */ 4359 ; 4360 4361 yesno : NO { $$ = 0; } 4362 | STRING { 4363 if (!strcmp($1, "yes")) 4364 $$ = 1; 4365 else { 4366 yyerror("invalid value '%s', expected 'yes' " 4367 "or 'no'", $1); 4368 free($1); 4369 YYERROR; 4370 } 4371 free($1); 4372 } 4373 ; 4374 4375 unaryop : '=' { $$ = PF_OP_EQ; } 4376 | '!' '=' { $$ = PF_OP_NE; } 4377 | '<' '=' { $$ = PF_OP_LE; } 4378 | '<' { $$ = PF_OP_LT; } 4379 | '>' '=' { $$ = PF_OP_GE; } 4380 | '>' { $$ = PF_OP_GT; } 4381 ; 4382 4383 %% 4384 4385 int 4386 yyerror(const char *fmt, ...) 4387 { 4388 va_list ap; 4389 4390 file->errors++; 4391 va_start(ap, fmt); 4392 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno); 4393 vfprintf(stderr, fmt, ap); 4394 fprintf(stderr, "\n"); 4395 va_end(ap); 4396 return (0); 4397 } 4398 4399 int 4400 disallow_table(struct node_host *h, const char *fmt) 4401 { 4402 for (; h != NULL; h = h->next) 4403 if (h->addr.type == PF_ADDR_TABLE) { 4404 yyerror(fmt, h->addr.v.tblname); 4405 return (1); 4406 } 4407 return (0); 4408 } 4409 4410 int 4411 disallow_urpf_failed(struct node_host *h, const char *fmt) 4412 { 4413 for (; h != NULL; h = h->next) 4414 if (h->addr.type == PF_ADDR_URPFFAILED) { 4415 yyerror("%s", fmt); 4416 return (1); 4417 } 4418 return (0); 4419 } 4420 4421 int 4422 disallow_alias(struct node_host *h, const char *fmt) 4423 { 4424 for (; h != NULL; h = h->next) 4425 if (DYNIF_MULTIADDR(h->addr)) { 4426 yyerror(fmt, h->addr.v.tblname); 4427 return (1); 4428 } 4429 return (0); 4430 } 4431 4432 int 4433 rule_consistent(struct pf_rule *r, int anchor_call __unused) 4434 { 4435 int problems = 0; 4436 4437 switch (r->action) { 4438 case PF_PASS: 4439 case PF_DROP: 4440 case PF_SCRUB: 4441 case PF_NOSCRUB: 4442 problems = filter_consistent(r, anchor_call); 4443 break; 4444 case PF_NAT: 4445 case PF_NONAT: 4446 problems = nat_consistent(r); 4447 break; 4448 case PF_RDR: 4449 case PF_NORDR: 4450 problems = rdr_consistent(r); 4451 break; 4452 case PF_BINAT: 4453 case PF_NOBINAT: 4454 default: 4455 break; 4456 } 4457 return (problems); 4458 } 4459 4460 int 4461 filter_consistent(struct pf_rule *r, int anchor_call __unused) 4462 { 4463 int problems = 0; 4464 4465 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 4466 (r->src.port_op || r->dst.port_op)) { 4467 yyerror("port only applies to tcp/udp"); 4468 problems++; 4469 } 4470 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 4471 (r->type || r->code)) { 4472 yyerror("icmp-type/code only applies to icmp"); 4473 problems++; 4474 } 4475 if (!r->af && (r->type || r->code)) { 4476 yyerror("must indicate address family with icmp-type/code"); 4477 problems++; 4478 } 4479 if (r->overload_tblname[0] && 4480 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) { 4481 yyerror("'overload' requires 'max-src-conn' " 4482 "or 'max-src-conn-rate'"); 4483 problems++; 4484 } 4485 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 4486 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 4487 yyerror("proto %s doesn't match address family %s", 4488 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 4489 r->af == AF_INET ? "inet" : "inet6"); 4490 problems++; 4491 } 4492 if (r->allow_opts && r->action != PF_PASS) { 4493 yyerror("allow-opts can only be specified for pass rules"); 4494 problems++; 4495 } 4496 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 4497 r->dst.port_op || r->flagset || r->type || r->code)) { 4498 yyerror("fragments can be filtered only on IP header fields"); 4499 problems++; 4500 } 4501 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 4502 yyerror("return-rst can only be applied to TCP rules"); 4503 problems++; 4504 } 4505 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) { 4506 yyerror("max-src-nodes requires 'source-track rule'"); 4507 problems++; 4508 } 4509 if (r->action == PF_DROP && r->keep_state) { 4510 yyerror("keep state on block rules doesn't make sense"); 4511 problems++; 4512 } 4513 if (r->rule_flag & PFRULE_STATESLOPPY && 4514 (r->keep_state == PF_STATE_MODULATE || 4515 r->keep_state == PF_STATE_SYNPROXY)) { 4516 yyerror("sloppy state matching cannot be used with " 4517 "synproxy state or modulate state"); 4518 problems++; 4519 } 4520 return (-problems); 4521 } 4522 4523 int 4524 nat_consistent(struct pf_rule *r __unused) 4525 { 4526 return (0); /* yeah! */ 4527 } 4528 4529 int 4530 rdr_consistent(struct pf_rule *r) 4531 { 4532 int problems = 0; 4533 4534 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) { 4535 if (r->src.port_op) { 4536 yyerror("src port only applies to tcp/udp"); 4537 problems++; 4538 } 4539 if (r->dst.port_op) { 4540 yyerror("dst port only applies to tcp/udp"); 4541 problems++; 4542 } 4543 if (r->rpool.proxy_port[0]) { 4544 yyerror("rpool port only applies to tcp/udp"); 4545 problems++; 4546 } 4547 } 4548 if (r->dst.port_op && 4549 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 4550 yyerror("invalid port operator for rdr destination port"); 4551 problems++; 4552 } 4553 return (-problems); 4554 } 4555 4556 int 4557 process_tabledef(char *name, struct table_opts *opts) 4558 { 4559 struct pfr_buffer ab; 4560 struct node_tinit *ti; 4561 4562 bzero(&ab, sizeof(ab)); 4563 ab.pfrb_type = PFRB_ADDRS; 4564 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 4565 if (ti->file) 4566 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) { 4567 if (errno) 4568 yyerror("cannot load \"%s\": %s", 4569 ti->file, strerror(errno)); 4570 else 4571 yyerror("file \"%s\" contains bad data", 4572 ti->file); 4573 goto _error; 4574 } 4575 if (ti->host) 4576 if (append_addr_host(&ab, ti->host, 0, 0)) { 4577 yyerror("cannot create address buffer: %s", 4578 strerror(errno)); 4579 goto _error; 4580 } 4581 } 4582 if (pf->opts & PF_OPT_VERBOSE) 4583 print_tabledef(name, opts->flags, opts->init_addr, 4584 &opts->init_nodes); 4585 if (!(pf->opts & PF_OPT_NOACTION) && 4586 pfctl_define_table(name, opts->flags, opts->init_addr, 4587 pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) { 4588 yyerror("cannot define table %s: %s", name, 4589 pfr_strerror(errno)); 4590 goto _error; 4591 } 4592 pf->tdirty = 1; 4593 pfr_buf_clear(&ab); 4594 return (0); 4595 _error: 4596 pfr_buf_clear(&ab); 4597 return (-1); 4598 } 4599 4600 struct keywords { 4601 const char *k_name; 4602 int k_val; 4603 }; 4604 4605 /* macro gore, but you should've seen the prior indentation nightmare... */ 4606 4607 #define FREE_LIST(T,r) \ 4608 do { \ 4609 T *p, *node = r; \ 4610 while (node != NULL) { \ 4611 p = node; \ 4612 node = node->next; \ 4613 free(p); \ 4614 } \ 4615 } while (0) 4616 4617 #define LOOP_THROUGH(T,n,r,C) \ 4618 do { \ 4619 T *n; \ 4620 if (r == NULL) { \ 4621 r = calloc(1, sizeof(T)); \ 4622 if (r == NULL) \ 4623 err(1, "LOOP: calloc"); \ 4624 r->next = NULL; \ 4625 } \ 4626 n = r; \ 4627 while (n != NULL) { \ 4628 do { \ 4629 C; \ 4630 } while (0); \ 4631 n = n->next; \ 4632 } \ 4633 } while (0) 4634 4635 void 4636 expand_label_str(char *label, size_t len, const char *srch, const char *repl) 4637 { 4638 char *tmp; 4639 char *p, *q; 4640 4641 if ((tmp = calloc(1, len)) == NULL) 4642 err(1, "expand_label_str: calloc"); 4643 p = q = label; 4644 while ((q = strstr(p, srch)) != NULL) { 4645 *q = '\0'; 4646 if ((strlcat(tmp, p, len) >= len) || 4647 (strlcat(tmp, repl, len) >= len)) 4648 errx(1, "expand_label: label too long"); 4649 q += strlen(srch); 4650 p = q; 4651 } 4652 if (strlcat(tmp, p, len) >= len) 4653 errx(1, "expand_label: label too long"); 4654 strlcpy(label, tmp, len); /* always fits */ 4655 free(tmp); 4656 } 4657 4658 void 4659 expand_label_if(const char *name, char *label, size_t len, const char *ifname) 4660 { 4661 if (strstr(label, name) != NULL) { 4662 if (!*ifname) 4663 expand_label_str(label, len, name, "any"); 4664 else 4665 expand_label_str(label, len, name, ifname); 4666 } 4667 } 4668 4669 void 4670 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af, 4671 struct node_host *h) 4672 { 4673 char tmp[64], tmp_not[66]; 4674 4675 if (strstr(label, name) != NULL) { 4676 switch (h->addr.type) { 4677 case PF_ADDR_DYNIFTL: 4678 snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname); 4679 break; 4680 case PF_ADDR_TABLE: 4681 snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname); 4682 break; 4683 case PF_ADDR_NOROUTE: 4684 snprintf(tmp, sizeof(tmp), "no-route"); 4685 break; 4686 case PF_ADDR_URPFFAILED: 4687 snprintf(tmp, sizeof(tmp), "urpf-failed"); 4688 break; 4689 case PF_ADDR_ADDRMASK: 4690 if (!af || (PF_AZERO(&h->addr.v.a.addr, af) && 4691 PF_AZERO(&h->addr.v.a.mask, af))) 4692 snprintf(tmp, sizeof(tmp), "any"); 4693 else { 4694 char a[48]; 4695 int bits; 4696 4697 if (inet_ntop(af, &h->addr.v.a.addr, a, 4698 sizeof(a)) == NULL) 4699 snprintf(tmp, sizeof(tmp), "?"); 4700 else { 4701 bits = unmask(&h->addr.v.a.mask, af); 4702 if ((af == AF_INET && bits < 32) || 4703 (af == AF_INET6 && bits < 128)) 4704 snprintf(tmp, sizeof(tmp), 4705 "%s/%d", a, bits); 4706 else 4707 snprintf(tmp, sizeof(tmp), 4708 "%s", a); 4709 } 4710 } 4711 break; 4712 default: 4713 snprintf(tmp, sizeof(tmp), "?"); 4714 break; 4715 } 4716 4717 if (h->not) { 4718 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 4719 expand_label_str(label, len, name, tmp_not); 4720 } else 4721 expand_label_str(label, len, name, tmp); 4722 } 4723 } 4724 4725 void 4726 expand_label_port(const char *name, char *label, size_t len, 4727 struct node_port *port) 4728 { 4729 char a1[6], a2[6], op[13] = ""; 4730 4731 if (strstr(label, name) != NULL) { 4732 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0])); 4733 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1])); 4734 if (!port->op) 4735 ; 4736 else if (port->op == PF_OP_IRG) 4737 snprintf(op, sizeof(op), "%s><%s", a1, a2); 4738 else if (port->op == PF_OP_XRG) 4739 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 4740 else if (port->op == PF_OP_EQ) 4741 snprintf(op, sizeof(op), "%s", a1); 4742 else if (port->op == PF_OP_NE) 4743 snprintf(op, sizeof(op), "!=%s", a1); 4744 else if (port->op == PF_OP_LT) 4745 snprintf(op, sizeof(op), "<%s", a1); 4746 else if (port->op == PF_OP_LE) 4747 snprintf(op, sizeof(op), "<=%s", a1); 4748 else if (port->op == PF_OP_GT) 4749 snprintf(op, sizeof(op), ">%s", a1); 4750 else if (port->op == PF_OP_GE) 4751 snprintf(op, sizeof(op), ">=%s", a1); 4752 expand_label_str(label, len, name, op); 4753 } 4754 } 4755 4756 void 4757 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto) 4758 { 4759 struct protoent *pe; 4760 char n[4]; 4761 4762 if (strstr(label, name) != NULL) { 4763 pe = getprotobynumber(proto); 4764 if (pe != NULL) 4765 expand_label_str(label, len, name, pe->p_name); 4766 else { 4767 snprintf(n, sizeof(n), "%u", proto); 4768 expand_label_str(label, len, name, n); 4769 } 4770 } 4771 } 4772 4773 void 4774 expand_label_nr(const char *name, char *label, size_t len) 4775 { 4776 char n[11]; 4777 4778 if (strstr(label, name) != NULL) { 4779 snprintf(n, sizeof(n), "%u", pf->anchor->match); 4780 expand_label_str(label, len, name, n); 4781 } 4782 } 4783 4784 void 4785 expand_label(char *label, size_t len, const char *ifname, sa_family_t af, 4786 struct node_host *src_host, struct node_port *src_port, 4787 struct node_host *dst_host, struct node_port *dst_port, 4788 u_int8_t proto) 4789 { 4790 expand_label_if("$if", label, len, ifname); 4791 expand_label_addr("$srcaddr", label, len, af, src_host); 4792 expand_label_addr("$dstaddr", label, len, af, dst_host); 4793 expand_label_port("$srcport", label, len, src_port); 4794 expand_label_port("$dstport", label, len, dst_port); 4795 expand_label_proto("$proto", label, len, proto); 4796 expand_label_nr("$nr", label, len); 4797 } 4798 4799 int 4800 expand_altq(struct pf_altq *a, struct node_if *interfaces, 4801 struct node_queue *nqueues, struct node_queue_bw bwspec, 4802 struct node_queue_opt *opts) 4803 { 4804 struct pf_altq pa, pb; 4805 char qname[PF_QNAME_SIZE]; 4806 struct node_queue *n; 4807 struct node_queue_bw bw; 4808 int errs = 0; 4809 4810 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 4811 FREE_LIST(struct node_if, interfaces); 4812 FREE_LIST(struct node_queue, nqueues); 4813 return (0); 4814 } 4815 4816 LOOP_THROUGH(struct node_if, interface, interfaces, 4817 memcpy(&pa, a, sizeof(struct pf_altq)); 4818 if (strlcpy(pa.ifname, interface->ifname, 4819 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 4820 errx(1, "expand_altq: strlcpy"); 4821 4822 if (interface->not) { 4823 yyerror("altq on ! <interface> is not supported"); 4824 errs++; 4825 } else { 4826 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 4827 errs++; 4828 else 4829 if (pfctl_add_altq(pf, &pa)) 4830 errs++; 4831 4832 if (pf->opts & PF_OPT_VERBOSE) { 4833 print_altq(&pf->paltq->altq, 0, 4834 &bwspec, opts); 4835 if (nqueues && nqueues->tail) { 4836 printf("queue { "); 4837 LOOP_THROUGH(struct node_queue, queue, 4838 nqueues, 4839 printf("%s ", 4840 queue->queue); 4841 ); 4842 printf("}"); 4843 } 4844 printf("\n"); 4845 } 4846 4847 if (pa.scheduler == ALTQT_CBQ || 4848 pa.scheduler == ALTQT_HFSC) { 4849 /* now create a root queue */ 4850 memset(&pb, 0, sizeof(struct pf_altq)); 4851 if (strlcpy(qname, "root_", sizeof(qname)) >= 4852 sizeof(qname)) 4853 errx(1, "expand_altq: strlcpy"); 4854 if (strlcat(qname, interface->ifname, 4855 sizeof(qname)) >= sizeof(qname)) 4856 errx(1, "expand_altq: strlcat"); 4857 if (strlcpy(pb.qname, qname, 4858 sizeof(pb.qname)) >= sizeof(pb.qname)) 4859 errx(1, "expand_altq: strlcpy"); 4860 if (strlcpy(pb.ifname, interface->ifname, 4861 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 4862 errx(1, "expand_altq: strlcpy"); 4863 pb.qlimit = pa.qlimit; 4864 pb.scheduler = pa.scheduler; 4865 bw.bw_absolute = pa.ifbandwidth; 4866 bw.bw_percent = 0; 4867 if (eval_pfqueue(pf, &pb, &bw, opts)) 4868 errs++; 4869 else 4870 if (pfctl_add_altq(pf, &pb)) 4871 errs++; 4872 } 4873 4874 LOOP_THROUGH(struct node_queue, queue, nqueues, 4875 n = calloc(1, sizeof(struct node_queue)); 4876 if (n == NULL) 4877 err(1, "expand_altq: calloc"); 4878 if (pa.scheduler == ALTQT_CBQ || 4879 pa.scheduler == ALTQT_HFSC /*|| 4880 pa.scheduler == ALTQT_FAIRQ*/) 4881 if (strlcpy(n->parent, qname, 4882 sizeof(n->parent)) >= 4883 sizeof(n->parent)) 4884 errx(1, "expand_altq: strlcpy"); 4885 if (strlcpy(n->queue, queue->queue, 4886 sizeof(n->queue)) >= sizeof(n->queue)) 4887 errx(1, "expand_altq: strlcpy"); 4888 if (strlcpy(n->ifname, interface->ifname, 4889 sizeof(n->ifname)) >= sizeof(n->ifname)) 4890 errx(1, "expand_altq: strlcpy"); 4891 n->scheduler = pa.scheduler; 4892 n->next = NULL; 4893 n->tail = n; 4894 if (queues == NULL) 4895 queues = n; 4896 else { 4897 queues->tail->next = n; 4898 queues->tail = n; 4899 } 4900 ); 4901 } 4902 ); 4903 FREE_LIST(struct node_if, interfaces); 4904 FREE_LIST(struct node_queue, nqueues); 4905 4906 return (errs); 4907 } 4908 4909 int 4910 expand_queue(struct pf_altq *a, struct node_if *interfaces, 4911 struct node_queue *nqueues, struct node_queue_bw bwspec, 4912 struct node_queue_opt *opts) 4913 { 4914 struct node_queue *n, *nq; 4915 struct pf_altq pa; 4916 u_int8_t found = 0; 4917 u_int8_t errs = 0; 4918 4919 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 4920 FREE_LIST(struct node_queue, nqueues); 4921 return (0); 4922 } 4923 4924 if (queues == NULL) { 4925 yyerror("queue %s has no parent", a->qname); 4926 FREE_LIST(struct node_queue, nqueues); 4927 return (1); 4928 } 4929 4930 LOOP_THROUGH(struct node_if, interface, interfaces, 4931 LOOP_THROUGH(struct node_queue, tqueue, queues, 4932 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 4933 (interface->ifname[0] == 0 || 4934 (!interface->not && !strncmp(interface->ifname, 4935 tqueue->ifname, IFNAMSIZ)) || 4936 (interface->not && strncmp(interface->ifname, 4937 tqueue->ifname, IFNAMSIZ)))) { 4938 /* found ourself in queues */ 4939 found++; 4940 4941 memcpy(&pa, a, sizeof(struct pf_altq)); 4942 4943 if (pa.scheduler != ALTQT_NONE && 4944 pa.scheduler != tqueue->scheduler) { 4945 yyerror("exactly one scheduler type " 4946 "per interface allowed"); 4947 return (1); 4948 } 4949 pa.scheduler = tqueue->scheduler; 4950 4951 /* scheduler dependent error checking */ 4952 switch (pa.scheduler) { 4953 case ALTQT_PRIQ: 4954 if (nqueues != NULL) { 4955 yyerror("priq queues cannot " 4956 "have child queues"); 4957 return (1); 4958 } 4959 if (bwspec.bw_absolute > 0 || 4960 bwspec.bw_percent < 100) { 4961 yyerror("priq doesn't take " 4962 "bandwidth"); 4963 return (1); 4964 } 4965 break; 4966 default: 4967 break; 4968 } 4969 4970 if (strlcpy(pa.ifname, tqueue->ifname, 4971 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 4972 errx(1, "expand_queue: strlcpy"); 4973 if (strlcpy(pa.parent, tqueue->parent, 4974 sizeof(pa.parent)) >= sizeof(pa.parent)) 4975 errx(1, "expand_queue: strlcpy"); 4976 4977 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 4978 errs++; 4979 else 4980 if (pfctl_add_altq(pf, &pa)) 4981 errs++; 4982 4983 for (nq = nqueues; nq != NULL; nq = nq->next) { 4984 if (!strcmp(a->qname, nq->queue)) { 4985 yyerror("queue cannot have " 4986 "itself as child"); 4987 errs++; 4988 continue; 4989 } 4990 n = calloc(1, 4991 sizeof(struct node_queue)); 4992 if (n == NULL) 4993 err(1, "expand_queue: calloc"); 4994 if (strlcpy(n->parent, a->qname, 4995 sizeof(n->parent)) >= 4996 sizeof(n->parent)) 4997 errx(1, "expand_queue strlcpy"); 4998 if (strlcpy(n->queue, nq->queue, 4999 sizeof(n->queue)) >= 5000 sizeof(n->queue)) 5001 errx(1, "expand_queue strlcpy"); 5002 if (strlcpy(n->ifname, tqueue->ifname, 5003 sizeof(n->ifname)) >= 5004 sizeof(n->ifname)) 5005 errx(1, "expand_queue strlcpy"); 5006 n->scheduler = tqueue->scheduler; 5007 n->next = NULL; 5008 n->tail = n; 5009 if (queues == NULL) 5010 queues = n; 5011 else { 5012 queues->tail->next = n; 5013 queues->tail = n; 5014 } 5015 } 5016 if ((pf->opts & PF_OPT_VERBOSE) && ( 5017 (found == 1 && interface->ifname[0] == 0) || 5018 (found > 0 && interface->ifname[0] != 0))) { 5019 print_queue(&pf->paltq->altq, 0, 5020 &bwspec, interface->ifname[0] != 0, 5021 opts); 5022 if (nqueues && nqueues->tail) { 5023 printf("{ "); 5024 LOOP_THROUGH(struct node_queue, 5025 queue, nqueues, 5026 printf("%s ", 5027 queue->queue); 5028 ); 5029 printf("}"); 5030 } 5031 printf("\n"); 5032 } 5033 } 5034 ); 5035 ); 5036 5037 FREE_LIST(struct node_queue, nqueues); 5038 FREE_LIST(struct node_if, interfaces); 5039 5040 if (!found) { 5041 yyerror("queue %s has no parent", a->qname); 5042 errs++; 5043 } 5044 5045 if (errs) 5046 return (1); 5047 else 5048 return (0); 5049 } 5050 5051 void 5052 expand_rule(struct pf_rule *r, 5053 struct node_if *interfaces, struct node_host *rpool_hosts, 5054 struct node_proto *protos, struct node_os *src_oses, 5055 struct node_host *src_hosts, struct node_port *src_ports, 5056 struct node_host *dst_hosts, struct node_port *dst_ports, 5057 struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types, 5058 const char *anchor_call) 5059 { 5060 sa_family_t af = r->af; 5061 int added = 0, error = 0; 5062 char ifname[IF_NAMESIZE]; 5063 char label[PF_RULE_LABEL_SIZE]; 5064 char tagname[PF_TAG_NAME_SIZE]; 5065 char match_tagname[PF_TAG_NAME_SIZE]; 5066 struct pf_pooladdr *pa; 5067 struct node_host *h; 5068 u_int8_t flags, flagset, keep_state; 5069 5070 if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label)) 5071 errx(1, "expand_rule: strlcpy"); 5072 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 5073 errx(1, "expand_rule: strlcpy"); 5074 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 5075 sizeof(match_tagname)) 5076 errx(1, "expand_rule: strlcpy"); 5077 flags = r->flags; 5078 flagset = r->flagset; 5079 keep_state = r->keep_state; 5080 5081 LOOP_THROUGH(struct node_if, interface, interfaces, 5082 LOOP_THROUGH(struct node_proto, proto, protos, 5083 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 5084 LOOP_THROUGH(struct node_host, src_host, src_hosts, 5085 LOOP_THROUGH(struct node_port, src_port, src_ports, 5086 LOOP_THROUGH(struct node_os, src_os, src_oses, 5087 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 5088 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 5089 LOOP_THROUGH(struct node_uid, uid, uids, 5090 LOOP_THROUGH(struct node_gid, gid, gids, 5091 5092 r->af = af; 5093 /* for link-local IPv6 address, interface must match up */ 5094 if ((r->af && src_host->af && r->af != src_host->af) || 5095 (r->af && dst_host->af && r->af != dst_host->af) || 5096 (src_host->af && dst_host->af && 5097 src_host->af != dst_host->af) || 5098 (src_host->ifindex && dst_host->ifindex && 5099 src_host->ifindex != dst_host->ifindex) || 5100 (src_host->ifindex && *interface->ifname && 5101 src_host->ifindex != if_nametoindex(interface->ifname)) || 5102 (dst_host->ifindex && *interface->ifname && 5103 dst_host->ifindex != if_nametoindex(interface->ifname))) 5104 continue; 5105 if (!r->af && src_host->af) 5106 r->af = src_host->af; 5107 else if (!r->af && dst_host->af) 5108 r->af = dst_host->af; 5109 5110 if (*interface->ifname) 5111 strlcpy(r->ifname, interface->ifname, 5112 sizeof(r->ifname)); 5113 else if (if_indextoname(src_host->ifindex, ifname)) 5114 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 5115 else if (if_indextoname(dst_host->ifindex, ifname)) 5116 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 5117 else 5118 memset(r->ifname, '\0', sizeof(r->ifname)); 5119 5120 if (strlcpy(r->label, label, sizeof(r->label)) >= 5121 sizeof(r->label)) 5122 errx(1, "expand_rule: strlcpy"); 5123 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 5124 sizeof(r->tagname)) 5125 errx(1, "expand_rule: strlcpy"); 5126 if (strlcpy(r->match_tagname, match_tagname, 5127 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 5128 errx(1, "expand_rule: strlcpy"); 5129 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af, 5130 src_host, src_port, dst_host, dst_port, proto->proto); 5131 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af, 5132 src_host, src_port, dst_host, dst_port, proto->proto); 5133 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname, 5134 r->af, src_host, src_port, dst_host, dst_port, 5135 proto->proto); 5136 5137 error += check_netmask(src_host, r->af); 5138 error += check_netmask(dst_host, r->af); 5139 5140 r->ifnot = interface->not; 5141 r->proto = proto->proto; 5142 r->src.addr = src_host->addr; 5143 r->src.neg = src_host->not; 5144 r->src.port[0] = src_port->port[0]; 5145 r->src.port[1] = src_port->port[1]; 5146 r->src.port_op = src_port->op; 5147 r->dst.addr = dst_host->addr; 5148 r->dst.neg = dst_host->not; 5149 r->dst.port[0] = dst_port->port[0]; 5150 r->dst.port[1] = dst_port->port[1]; 5151 r->dst.port_op = dst_port->op; 5152 r->uid.op = uid->op; 5153 r->uid.uid[0] = uid->uid[0]; 5154 r->uid.uid[1] = uid->uid[1]; 5155 r->gid.op = gid->op; 5156 r->gid.gid[0] = gid->gid[0]; 5157 r->gid.gid[1] = gid->gid[1]; 5158 r->type = icmp_type->type; 5159 r->code = icmp_type->code; 5160 5161 if ((keep_state == PF_STATE_MODULATE || 5162 keep_state == PF_STATE_SYNPROXY) && 5163 r->proto && r->proto != IPPROTO_TCP) 5164 r->keep_state = PF_STATE_NORMAL; 5165 else 5166 r->keep_state = keep_state; 5167 5168 if (r->proto && r->proto != IPPROTO_TCP) { 5169 r->flags = 0; 5170 r->flagset = 0; 5171 } else { 5172 r->flags = flags; 5173 r->flagset = flagset; 5174 } 5175 if (icmp_type->proto && r->proto != icmp_type->proto) { 5176 yyerror("icmp-type mismatch"); 5177 error++; 5178 } 5179 5180 if (src_os && src_os->os) { 5181 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 5182 if ((pf->opts & PF_OPT_VERBOSE2) && 5183 r->os_fingerprint == PF_OSFP_NOMATCH) 5184 fprintf(stderr, 5185 "warning: unknown '%s' OS fingerprint\n", 5186 src_os->os); 5187 } else { 5188 r->os_fingerprint = PF_OSFP_ANY; 5189 } 5190 5191 TAILQ_INIT(&r->rpool.list); 5192 for (h = rpool_hosts; h != NULL; h = h->next) { 5193 pa = calloc(1, sizeof(struct pf_pooladdr)); 5194 if (pa == NULL) 5195 err(1, "expand_rule: calloc"); 5196 pa->addr = h->addr; 5197 if (h->ifname != NULL) { 5198 if (strlcpy(pa->ifname, h->ifname, 5199 sizeof(pa->ifname)) >= 5200 sizeof(pa->ifname)) 5201 errx(1, "expand_rule: strlcpy"); 5202 } else 5203 pa->ifname[0] = 0; 5204 TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries); 5205 } 5206 5207 if (rule_consistent(r, anchor_call[0]) < 0 || error) 5208 yyerror("skipping rule due to errors"); 5209 else { 5210 r->nr = pf->astack[pf->asd]->match++; 5211 pfctl_add_rule(pf, r, anchor_call); 5212 added++; 5213 } 5214 5215 )))))))))); 5216 5217 FREE_LIST(struct node_if, interfaces); 5218 FREE_LIST(struct node_proto, protos); 5219 FREE_LIST(struct node_host, src_hosts); 5220 FREE_LIST(struct node_port, src_ports); 5221 FREE_LIST(struct node_os, src_oses); 5222 FREE_LIST(struct node_host, dst_hosts); 5223 FREE_LIST(struct node_port, dst_ports); 5224 FREE_LIST(struct node_uid, uids); 5225 FREE_LIST(struct node_gid, gids); 5226 FREE_LIST(struct node_icmp, icmp_types); 5227 FREE_LIST(struct node_host, rpool_hosts); 5228 5229 if (!added) 5230 yyerror("rule expands to no valid combination"); 5231 } 5232 5233 int 5234 expand_skip_interface(struct node_if *interfaces) 5235 { 5236 int errs = 0; 5237 5238 if (!interfaces || (!interfaces->next && !interfaces->not && 5239 !strcmp(interfaces->ifname, "none"))) { 5240 if (pf->opts & PF_OPT_VERBOSE) 5241 printf("set skip on none\n"); 5242 errs = pfctl_set_interface_flags(pf, __DECONST(char *, ""), PFI_IFLAG_SKIP, 0); 5243 return (errs); 5244 } 5245 5246 if (pf->opts & PF_OPT_VERBOSE) 5247 printf("set skip on {"); 5248 LOOP_THROUGH(struct node_if, interface, interfaces, 5249 if (pf->opts & PF_OPT_VERBOSE) 5250 printf(" %s", interface->ifname); 5251 if (interface->not) { 5252 yyerror("skip on ! <interface> is not supported"); 5253 errs++; 5254 } else 5255 errs += pfctl_set_interface_flags(pf, 5256 interface->ifname, PFI_IFLAG_SKIP, 1); 5257 ); 5258 if (pf->opts & PF_OPT_VERBOSE) 5259 printf(" }\n"); 5260 5261 FREE_LIST(struct node_if, interfaces); 5262 5263 if (errs) 5264 return (1); 5265 else 5266 return (0); 5267 } 5268 5269 #undef FREE_LIST 5270 #undef LOOP_THROUGH 5271 5272 int 5273 check_rulestate(int desired_state) 5274 { 5275 if (require_order && (rulestate > desired_state)) { 5276 yyerror("Rules must be in order: options, normalization, " 5277 "queueing, translation, filtering"); 5278 return (1); 5279 } 5280 rulestate = desired_state; 5281 return (0); 5282 } 5283 5284 int 5285 kw_cmp(const void *k, const void *e) 5286 { 5287 return (strcmp(k, ((const struct keywords *)e)->k_name)); 5288 } 5289 5290 int 5291 lookup(char *s) 5292 { 5293 /* this has to be sorted always */ 5294 static const struct keywords keywords[] = { 5295 { "all", ALL}, 5296 { "allow-opts", ALLOWOPTS}, 5297 { "altq", ALTQ}, 5298 { "anchor", ANCHOR}, 5299 { "antispoof", ANTISPOOF}, 5300 { "any", ANY}, 5301 { "bandwidth", BANDWIDTH}, 5302 { "binat", BINAT}, 5303 { "binat-anchor", BINATANCHOR}, 5304 { "bitmask", BITMASK}, 5305 { "block", BLOCK}, 5306 { "block-policy", BLOCKPOLICY}, 5307 { "buckets", BUCKETS}, 5308 { "cbq", CBQ}, 5309 { "code", CODE}, 5310 { "crop", FRAGCROP}, 5311 { "debug", DEBUG}, 5312 { "divert-reply", DIVERTREPLY}, 5313 { "divert-to", DIVERTTO}, 5314 { "drop", DROP}, 5315 { "drop-ovl", FRAGDROP}, 5316 { "dup-to", DUPTO}, 5317 { "fairq", FAIRQ}, 5318 { "fastroute", FASTROUTE}, 5319 { "file", FILENAME}, 5320 { "fingerprints", FINGERPRINTS}, 5321 { "flags", FLAGS}, 5322 { "floating", FLOATING}, 5323 { "flush", FLUSH}, 5324 { "for", FOR}, 5325 { "fragment", FRAGMENT}, 5326 { "from", FROM}, 5327 { "global", GLOBAL}, 5328 { "group", GROUP}, 5329 { "hash-only", HASHONLY}, 5330 { "hfsc", HFSC}, 5331 { "hogs", HOGS}, 5332 { "hostid", HOSTID}, 5333 { "icmp-type", ICMPTYPE}, 5334 { "icmp6-type", ICMP6TYPE}, 5335 { "if-bound", IFBOUND}, 5336 { "in", IN}, 5337 { "include", INCLUDE}, 5338 { "inet", INET}, 5339 { "inet6", INET6}, 5340 { "keep", KEEP}, 5341 { "keep-policy", KEEPPOLICY}, 5342 { "label", LABEL}, 5343 { "limit", LIMIT}, 5344 { "linkshare", LINKSHARE}, 5345 { "load", LOAD}, 5346 { "log", LOG}, 5347 { "loginterface", LOGINTERFACE}, 5348 { "max", MAXIMUM}, 5349 { "max-mss", MAXMSS}, 5350 { "max-src-conn", MAXSRCCONN}, 5351 { "max-src-conn-rate", MAXSRCCONNRATE}, 5352 { "max-src-nodes", MAXSRCNODES}, 5353 { "max-src-states", MAXSRCSTATES}, 5354 { "min-ttl", MINTTL}, 5355 { "modulate", MODULATE}, 5356 { "nat", NAT}, 5357 { "nat-anchor", NATANCHOR}, 5358 { "no", NO}, 5359 { "no-df", NODF}, 5360 { "no-pickups", NOPICKUPS}, 5361 { "no-route", NOROUTE}, 5362 { "no-sync", NOSYNC}, 5363 { "on", ON}, 5364 { "optimization", OPTIMIZATION}, 5365 { "os", OS}, 5366 { "out", OUT}, 5367 { "overload", OVERLOAD}, 5368 { "pass", PASS}, 5369 { "pickups", PICKUPS}, 5370 { "port", PORT}, 5371 { "priority", PRIORITY}, 5372 { "priq", PRIQ}, 5373 { "probability", PROBABILITY}, 5374 { "proto", PROTO}, 5375 { "qlimit", QLIMIT}, 5376 { "queue", QUEUE}, 5377 { "quick", QUICK}, 5378 { "random", RANDOM}, 5379 { "random-id", RANDOMID}, 5380 { "rdr", RDR}, 5381 { "rdr-anchor", RDRANCHOR}, 5382 { "realtime", REALTIME}, 5383 { "reassemble", REASSEMBLE}, 5384 { "reply-to", REPLYTO}, 5385 { "require-order", REQUIREORDER}, 5386 { "return", RETURN}, 5387 { "return-icmp", RETURNICMP}, 5388 { "return-icmp6", RETURNICMP6}, 5389 { "return-rst", RETURNRST}, 5390 { "round-robin", ROUNDROBIN}, 5391 { "route", ROUTE}, 5392 { "route-to", ROUTETO}, 5393 { "rtable", RTABLE}, 5394 { "rule", RULE}, 5395 { "ruleset-optimization", RULESET_OPTIMIZATION}, 5396 { "scrub", SCRUB}, 5397 { "set", SET}, 5398 { "set-tos", SETTOS}, 5399 { "skip", SKIP}, 5400 { "sloppy", SLOPPY}, 5401 { "source-hash", SOURCEHASH}, 5402 { "source-track", SOURCETRACK}, 5403 { "state", STATE}, 5404 { "state-policy", STATEPOLICY}, 5405 { "static-port", STATICPORT}, 5406 { "sticky-address", STICKYADDRESS}, 5407 { "synproxy", SYNPROXY}, 5408 { "table", TABLE}, 5409 { "tag", TAG}, 5410 { "tagged", TAGGED}, 5411 { "tbrsize", TBRSIZE}, 5412 { "timeout", TIMEOUT}, 5413 { "to", TO}, 5414 { "tos", TOS}, 5415 { "ttl", TTL}, 5416 { "upperlimit", UPPERLIMIT}, 5417 { "urpf-failed", URPFFAILED}, 5418 { "user", USER}, 5419 }; 5420 const struct keywords *p; 5421 5422 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 5423 sizeof(keywords[0]), kw_cmp); 5424 5425 if (p) { 5426 if (debug > 1) 5427 fprintf(stderr, "%s: %d\n", s, p->k_val); 5428 return (p->k_val); 5429 } else { 5430 if (debug > 1) 5431 fprintf(stderr, "string: %s\n", s); 5432 return (STRING); 5433 } 5434 } 5435 5436 #define MAXPUSHBACK 128 5437 5438 char *parsebuf; 5439 int parseindex; 5440 char pushback_buffer[MAXPUSHBACK]; 5441 int pushback_index = 0; 5442 5443 int 5444 lgetc(int quotec) 5445 { 5446 int c, next; 5447 5448 if (parsebuf) { 5449 /* Read character from the parsebuffer instead of input. */ 5450 if (parseindex >= 0) { 5451 c = parsebuf[parseindex++]; 5452 if (c != '\0') 5453 return (c); 5454 parsebuf = NULL; 5455 } else 5456 parseindex++; 5457 } 5458 5459 if (pushback_index) 5460 return (pushback_buffer[--pushback_index]); 5461 5462 if (quotec) { 5463 if ((c = getc(file->stream)) == EOF) { 5464 yyerror("reached end of file while parsing quoted string"); 5465 if (popfile() == EOF) 5466 return (EOF); 5467 return (quotec); 5468 } 5469 return (c); 5470 } 5471 5472 while ((c = getc(file->stream)) == '\\') { 5473 next = getc(file->stream); 5474 if (next != '\n') { 5475 c = next; 5476 break; 5477 } 5478 yylval.lineno = file->lineno; 5479 file->lineno++; 5480 } 5481 5482 while (c == EOF) { 5483 if (popfile() == EOF) 5484 return (EOF); 5485 c = getc(file->stream); 5486 } 5487 return (c); 5488 } 5489 5490 int 5491 lungetc(int c) 5492 { 5493 if (c == EOF) 5494 return (EOF); 5495 if (parsebuf) { 5496 parseindex--; 5497 if (parseindex >= 0) 5498 return (c); 5499 } 5500 if (pushback_index < MAXPUSHBACK-1) 5501 return (pushback_buffer[pushback_index++] = c); 5502 else 5503 return (EOF); 5504 } 5505 5506 int 5507 findeol(void) 5508 { 5509 int c; 5510 5511 parsebuf = NULL; 5512 pushback_index = 0; 5513 5514 /* skip to either EOF or the first real EOL */ 5515 while (1) { 5516 c = lgetc(0); 5517 if (c == '\n') { 5518 file->lineno++; 5519 break; 5520 } 5521 if (c == EOF) 5522 break; 5523 } 5524 return (ERROR); 5525 } 5526 5527 int 5528 yylex(void) 5529 { 5530 char buf[8096]; 5531 char *p, *val; 5532 int quotec, next, c; 5533 int token; 5534 5535 top: 5536 p = buf; 5537 while ((c = lgetc(0)) == ' ' || c == '\t') 5538 ; /* nothing */ 5539 5540 yylval.lineno = file->lineno; 5541 if (c == '#') 5542 while ((c = lgetc(0)) != '\n' && c != EOF) 5543 ; /* nothing */ 5544 if (c == '$' && parsebuf == NULL) { 5545 while (1) { 5546 if ((c = lgetc(0)) == EOF) 5547 return (0); 5548 5549 if (p + 1 >= buf + sizeof(buf) - 1) { 5550 yyerror("string too long"); 5551 return (findeol()); 5552 } 5553 if (isalnum(c) || c == '_') { 5554 *p++ = (char)c; 5555 continue; 5556 } 5557 *p = '\0'; 5558 lungetc(c); 5559 break; 5560 } 5561 val = symget(buf); 5562 if (val == NULL) { 5563 yyerror("macro '%s' not defined", buf); 5564 return (findeol()); 5565 } 5566 parsebuf = val; 5567 parseindex = 0; 5568 goto top; 5569 } 5570 5571 switch (c) { 5572 case '\'': 5573 case '"': 5574 quotec = c; 5575 while (1) { 5576 if ((c = lgetc(quotec)) == EOF) 5577 return (0); 5578 if (c == '\n') { 5579 file->lineno++; 5580 continue; 5581 } else if (c == '\\') { 5582 if ((next = lgetc(quotec)) == EOF) 5583 return (0); 5584 if (next == quotec || c == ' ' || c == '\t') 5585 c = next; 5586 else if (next == '\n') 5587 continue; 5588 else 5589 lungetc(next); 5590 } else if (c == quotec) { 5591 *p = '\0'; 5592 break; 5593 } 5594 if (p + 1 >= buf + sizeof(buf) - 1) { 5595 yyerror("string too long"); 5596 return (findeol()); 5597 } 5598 *p++ = (char)c; 5599 } 5600 yylval.v.string = strdup(buf); 5601 if (yylval.v.string == NULL) 5602 err(1, "yylex: strdup"); 5603 return (STRING); 5604 case '<': 5605 next = lgetc(0); 5606 if (next == '>') { 5607 yylval.v.i = PF_OP_XRG; 5608 return (PORTBINARY); 5609 } 5610 lungetc(next); 5611 break; 5612 case '>': 5613 next = lgetc(0); 5614 if (next == '<') { 5615 yylval.v.i = PF_OP_IRG; 5616 return (PORTBINARY); 5617 } 5618 lungetc(next); 5619 break; 5620 case '-': 5621 next = lgetc(0); 5622 if (next == '>') 5623 return (ARROW); 5624 lungetc(next); 5625 break; 5626 } 5627 5628 #define allowed_to_end_number(x) \ 5629 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 5630 5631 if (c == '-' || isdigit(c)) { 5632 do { 5633 *p++ = c; 5634 if ((unsigned)(p-buf) >= sizeof(buf)) { 5635 yyerror("string too long"); 5636 return (findeol()); 5637 } 5638 } while ((c = lgetc(0)) != EOF && isdigit(c)); 5639 lungetc(c); 5640 if (p == buf + 1 && buf[0] == '-') 5641 goto nodigits; 5642 if (c == EOF || allowed_to_end_number(c)) { 5643 const char *errstr = NULL; 5644 5645 *p = '\0'; 5646 yylval.v.number = strtonum(buf, LLONG_MIN, 5647 LLONG_MAX, &errstr); 5648 if (errstr) { 5649 yyerror("\"%s\" invalid number: %s", 5650 buf, errstr); 5651 return (findeol()); 5652 } 5653 return (NUMBER); 5654 } else { 5655 nodigits: 5656 while (p > buf + 1) 5657 lungetc(*--p); 5658 c = *--p; 5659 if (c == '-') 5660 return (c); 5661 } 5662 } 5663 5664 #define allowed_in_string(x) \ 5665 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 5666 x != '{' && x != '}' && x != '<' && x != '>' && \ 5667 x != '!' && x != '=' && x != '/' && x != '#' && \ 5668 x != ',')) 5669 5670 if (isalnum(c) || c == ':' || c == '_') { 5671 do { 5672 *p++ = c; 5673 if ((unsigned)(p-buf) >= sizeof(buf)) { 5674 yyerror("string too long"); 5675 return (findeol()); 5676 } 5677 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 5678 lungetc(c); 5679 *p = '\0'; 5680 if ((token = lookup(buf)) == STRING) 5681 if ((yylval.v.string = strdup(buf)) == NULL) 5682 err(1, "yylex: strdup"); 5683 return (token); 5684 } 5685 if (c == '\n') { 5686 yylval.lineno = file->lineno; 5687 file->lineno++; 5688 } 5689 if (c == EOF) 5690 return (0); 5691 return (c); 5692 } 5693 5694 int 5695 check_file_secrecy(int fd, const char *fname) 5696 { 5697 struct stat st; 5698 5699 if (fstat(fd, &st)) { 5700 warn("cannot stat %s", fname); 5701 return (-1); 5702 } 5703 if (st.st_uid != 0 && st.st_uid != getuid()) { 5704 warnx("%s: owner not root or current user", fname); 5705 return (-1); 5706 } 5707 if (st.st_mode & (S_IRWXG | S_IRWXO)) { 5708 warnx("%s: group/world readable/writeable", fname); 5709 return (-1); 5710 } 5711 return (0); 5712 } 5713 5714 struct file * 5715 pushfile(const char *name, int secret) 5716 { 5717 struct file *nfile; 5718 5719 if ((nfile = calloc(1, sizeof(struct file))) == NULL || 5720 (nfile->name = strdup(name)) == NULL) { 5721 warn("malloc"); 5722 return (NULL); 5723 } 5724 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 5725 nfile->stream = stdin; 5726 free(nfile->name); 5727 if ((nfile->name = strdup("stdin")) == NULL) { 5728 warn("strdup"); 5729 free(nfile); 5730 return (NULL); 5731 } 5732 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 5733 warn("%s", nfile->name); 5734 free(nfile->name); 5735 free(nfile); 5736 return (NULL); 5737 } else if (secret && 5738 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 5739 fclose(nfile->stream); 5740 free(nfile->name); 5741 free(nfile); 5742 return (NULL); 5743 } 5744 nfile->lineno = 1; 5745 TAILQ_INSERT_TAIL(&files, nfile, entry); 5746 return (nfile); 5747 } 5748 5749 int 5750 popfile(void) 5751 { 5752 struct file *prev; 5753 5754 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 5755 prev->errors += file->errors; 5756 TAILQ_REMOVE(&files, file, entry); 5757 fclose(file->stream); 5758 free(file->name); 5759 free(file); 5760 file = prev; 5761 return (0); 5762 } 5763 return (EOF); 5764 } 5765 5766 int 5767 parse_config(char *filename, struct pfctl *xpf) 5768 { 5769 int errors = 0; 5770 struct sym *sym; 5771 5772 pf = xpf; 5773 errors = 0; 5774 rulestate = PFCTL_STATE_NONE; 5775 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 5776 returnicmp6default = 5777 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 5778 blockpolicy = PFRULE_DROP; 5779 require_order = 1; 5780 5781 /* 5782 * Default keep-polifcy is: 5783 * 5784 * set keep-policy keep state (pickups, sloppy) 5785 * 5786 * pickups - Allows TCP connections to be picked up mid-stream, 5787 * meaning that router restarts and changes in packet 5788 * routing will not destroy TCP connections already in 5789 * progress. 5790 * 5791 * sloppy - Window scale options are only sent with SYN and SYN+ACK, 5792 * when picking up a connection in the middle, such as when 5793 * the router has been restarted or when multi-pathing 5794 * occurs, PF will not understand the window scale. This 5795 * tells PF to ignore the sequence space tests for this case. 5796 * 5797 * While it is true that ICMP attack vectors are easier with these 5798 * options, the problem is that PF just has no business defaulting 5799 * to strict enforcement because it completely destroys the system 5800 * operator's ability to multi-path packets, to change packet routing, 5801 * or to restart the router (or PF) without kicking *ALL* active TCP 5802 * connections that were flowing through the router at the time. It 5803 * unacceptable to kick active connections by default. 5804 */ 5805 { 5806 struct node_state_opt *opt1 = calloc(1, sizeof(*opt1)); 5807 struct node_state_opt *opt2 = calloc(1, sizeof(*opt2)); 5808 5809 opt1->type = PF_STATE_OPT_PICKUPS; 5810 opt1->data.pickup_mode = PF_PICKUPS_ENABLED; 5811 opt1->next = NULL; 5812 opt1->tail = opt1; 5813 5814 opt2->type = PF_STATE_OPT_SLOPPY; 5815 opt2->next = NULL; 5816 opt2->tail = opt1; 5817 5818 default_keeppolicy_action = PF_STATE_NORMAL; 5819 default_keeppolicy_options = opt1; 5820 opt1->next = opt2; 5821 opt1->tail = opt2; 5822 } 5823 5824 if ((file = pushfile(filename, 0)) == NULL) { 5825 warn("cannot open the main config file!"); 5826 return (-1); 5827 } 5828 5829 yyparse(); 5830 errors = file->errors; 5831 popfile(); 5832 5833 /* Free macros and check which have not been used. */ 5834 while ((sym = TAILQ_FIRST(&symhead))) { 5835 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 5836 fprintf(stderr, "warning: macro '%s' not " 5837 "used\n", sym->nam); 5838 free(sym->nam); 5839 free(sym->val); 5840 TAILQ_REMOVE(&symhead, sym, entry); 5841 free(sym); 5842 } 5843 5844 return (errors ? -1 : 0); 5845 } 5846 5847 int 5848 symset(const char *nam, const char *val, int persist) 5849 { 5850 struct sym *sym; 5851 5852 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 5853 sym = TAILQ_NEXT(sym, entry)) 5854 ; /* nothing */ 5855 5856 if (sym != NULL) { 5857 if (sym->persist == 1) 5858 return (0); 5859 else { 5860 free(sym->nam); 5861 free(sym->val); 5862 TAILQ_REMOVE(&symhead, sym, entry); 5863 free(sym); 5864 } 5865 } 5866 if ((sym = calloc(1, sizeof(*sym))) == NULL) 5867 return (-1); 5868 5869 sym->nam = strdup(nam); 5870 if (sym->nam == NULL) { 5871 free(sym); 5872 return (-1); 5873 } 5874 sym->val = strdup(val); 5875 if (sym->val == NULL) { 5876 free(sym->nam); 5877 free(sym); 5878 return (-1); 5879 } 5880 sym->used = 0; 5881 sym->persist = persist; 5882 TAILQ_INSERT_TAIL(&symhead, sym, entry); 5883 return (0); 5884 } 5885 5886 int 5887 pfctl_cmdline_symset(char *s) 5888 { 5889 char *sym, *val; 5890 int ret; 5891 5892 if ((val = strrchr(s, '=')) == NULL) 5893 return (-1); 5894 5895 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL) 5896 err(1, "pfctl_cmdline_symset: malloc"); 5897 5898 strlcpy(sym, s, strlen(s) - strlen(val) + 1); 5899 5900 ret = symset(sym, val + 1, 1); 5901 free(sym); 5902 5903 return (ret); 5904 } 5905 5906 char * 5907 symget(const char *nam) 5908 { 5909 struct sym *sym; 5910 5911 TAILQ_FOREACH(sym, &symhead, entry) 5912 if (strcmp(nam, sym->nam) == 0) { 5913 sym->used = 1; 5914 return (sym->val); 5915 } 5916 return (NULL); 5917 } 5918 5919 void 5920 mv_rules(struct pf_ruleset *src, struct pf_ruleset *dst) 5921 { 5922 int i; 5923 struct pf_rule *r; 5924 5925 for (i = 0; i < PF_RULESET_MAX; ++i) { 5926 while ((r = TAILQ_FIRST(src->rules[i].active.ptr)) 5927 != NULL) { 5928 TAILQ_REMOVE(src->rules[i].active.ptr, r, entries); 5929 TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries); 5930 dst->anchor->match++; 5931 } 5932 src->anchor->match = 0; 5933 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr)) 5934 != NULL) { 5935 TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries); 5936 TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr, 5937 r, entries); 5938 } 5939 } 5940 } 5941 5942 void 5943 decide_address_family(struct node_host *n, sa_family_t *af) 5944 { 5945 if (*af != 0 || n == NULL) 5946 return; 5947 *af = n->af; 5948 while ((n = n->next) != NULL) { 5949 if (n->af != *af) { 5950 *af = 0; 5951 return; 5952 } 5953 } 5954 } 5955 5956 void 5957 remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 5958 { 5959 struct node_host *n = *nh, *prev = NULL; 5960 5961 while (n != NULL) { 5962 if (*af && n->af && n->af != *af) { 5963 /* unlink and free n */ 5964 struct node_host *next = n->next; 5965 5966 /* adjust tail pointer */ 5967 if (n == (*nh)->tail) 5968 (*nh)->tail = prev; 5969 /* adjust previous node's next pointer */ 5970 if (prev == NULL) 5971 *nh = next; 5972 else 5973 prev->next = next; 5974 /* free node */ 5975 if (n->ifname != NULL) 5976 free(n->ifname); 5977 free(n); 5978 n = next; 5979 } else { 5980 if (n->af && !*af) 5981 *af = n->af; 5982 prev = n; 5983 n = n->next; 5984 } 5985 } 5986 } 5987 5988 int 5989 invalid_redirect(struct node_host *nh, sa_family_t af) 5990 { 5991 if (!af) { 5992 struct node_host *n; 5993 5994 /* tables and dyniftl are ok without an address family */ 5995 for (n = nh; n != NULL; n = n->next) { 5996 if (n->addr.type != PF_ADDR_TABLE && 5997 n->addr.type != PF_ADDR_DYNIFTL) { 5998 yyerror("address family not given and " 5999 "translation address expands to multiple " 6000 "address families"); 6001 return (1); 6002 } 6003 } 6004 } 6005 if (nh == NULL) { 6006 yyerror("no translation address with matching address family " 6007 "found."); 6008 return (1); 6009 } 6010 return (0); 6011 } 6012 6013 int 6014 atoul(char *s, u_long *ulvalp) 6015 { 6016 u_long ulval; 6017 char *ep; 6018 6019 errno = 0; 6020 ulval = strtoul(s, &ep, 0); 6021 if (s[0] == '\0' || *ep != '\0') 6022 return (-1); 6023 if (errno == ERANGE && ulval == ULONG_MAX) 6024 return (-1); 6025 *ulvalp = ulval; 6026 return (0); 6027 } 6028 6029 int 6030 getservice(char *n) 6031 { 6032 struct servent *s; 6033 u_long ulval; 6034 6035 if (atoul(n, &ulval) == 0) { 6036 if (ulval > 65535) { 6037 yyerror("illegal port value %lu", ulval); 6038 return (-1); 6039 } 6040 return (htons(ulval)); 6041 } else { 6042 s = getservbyname(n, "tcp"); 6043 if (s == NULL) 6044 s = getservbyname(n, "udp"); 6045 if (s == NULL) { 6046 yyerror("unknown port %s", n); 6047 return (-1); 6048 } 6049 return (s->s_port); 6050 } 6051 } 6052 6053 int 6054 rule_label(struct pf_rule *r, char *s) 6055 { 6056 if (s) { 6057 if (strlcpy(r->label, s, sizeof(r->label)) >= 6058 sizeof(r->label)) { 6059 yyerror("rule label too long (max %zd chars)", 6060 sizeof(r->label)-1); 6061 return (-1); 6062 } 6063 } 6064 return (0); 6065 } 6066 6067 u_int16_t 6068 parseicmpspec(char *w, sa_family_t af) 6069 { 6070 const struct icmpcodeent *p; 6071 u_long ulval; 6072 u_int8_t icmptype; 6073 6074 if (af == AF_INET) 6075 icmptype = returnicmpdefault >> 8; 6076 else 6077 icmptype = returnicmp6default >> 8; 6078 6079 if (atoul(w, &ulval) == -1) { 6080 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 6081 yyerror("unknown icmp code %s", w); 6082 return (0); 6083 } 6084 ulval = p->code; 6085 } 6086 if (ulval > 255) { 6087 yyerror("invalid icmp code %lu", ulval); 6088 return (0); 6089 } 6090 return (icmptype << 8 | ulval); 6091 } 6092 6093 int 6094 parseport(char *port, struct range *r, int extensions) 6095 { 6096 char *p = strchr(port, ':'); 6097 6098 if (p == NULL) { 6099 if ((r->a = getservice(port)) == -1) 6100 return (-1); 6101 r->b = 0; 6102 r->t = PF_OP_NONE; 6103 return (0); 6104 } 6105 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) { 6106 *p = 0; 6107 if ((r->a = getservice(port)) == -1) 6108 return (-1); 6109 r->b = 0; 6110 r->t = PF_OP_IRG; 6111 return (0); 6112 } 6113 if ((extensions & PPORT_RANGE)) { 6114 *p++ = 0; 6115 if ((r->a = getservice(port)) == -1 || 6116 (r->b = getservice(p)) == -1) 6117 return (-1); 6118 if (r->a == r->b) { 6119 r->b = 0; 6120 r->t = PF_OP_NONE; 6121 } else 6122 r->t = PF_OP_RRG; 6123 return (0); 6124 } 6125 return (-1); 6126 } 6127 6128 int 6129 pfctl_load_anchors(int dev, struct pfctl *his_pf, struct pfr_buffer *trans) 6130 { 6131 struct loadanchors *la; 6132 6133 TAILQ_FOREACH(la, &loadanchorshead, entries) { 6134 if (his_pf->opts & PF_OPT_VERBOSE) 6135 fprintf(stderr, "\nLoading anchor %s from %s\n", 6136 la->anchorname, la->filename); 6137 if (pfctl_rules(dev, la->filename, his_pf->opts, his_pf->optimize, 6138 la->anchorname, trans) == -1) 6139 return (-1); 6140 } 6141 6142 return (0); 6143 } 6144