1 /* $OpenBSD: parse.y,v 1.554 2008/10/17 12:59:53 henning Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2001 Markus Friedl. All rights reserved. 7 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved. 8 * Copyright (c) 2001 Theo de Raadt. All rights reserved. 9 * Copyright (c) 2002,2003 Henning Brauer. All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 %{ 32 #include <sys/cdefs.h> 33 #define PFIOC_USE_LATEST 34 35 #include <sys/types.h> 36 #include <sys/socket.h> 37 #include <sys/stat.h> 38 #ifdef __FreeBSD__ 39 #include <sys/sysctl.h> 40 #endif 41 #include <net/if.h> 42 #include <netinet/in.h> 43 #include <netinet/in_systm.h> 44 #include <netinet/ip.h> 45 #include <netinet/ip_icmp.h> 46 #include <netinet/icmp6.h> 47 #include <net/pfvar.h> 48 #include <arpa/inet.h> 49 #include <net/altq/altq.h> 50 #include <net/altq/altq_cbq.h> 51 #include <net/altq/altq_codel.h> 52 #include <net/altq/altq_priq.h> 53 #include <net/altq/altq_hfsc.h> 54 #include <net/altq/altq_fairq.h> 55 56 #include <assert.h> 57 #include <stdio.h> 58 #include <unistd.h> 59 #include <stdlib.h> 60 #include <netdb.h> 61 #include <stdarg.h> 62 #include <errno.h> 63 #include <string.h> 64 #include <ctype.h> 65 #include <math.h> 66 #include <err.h> 67 #include <limits.h> 68 #include <pwd.h> 69 #include <grp.h> 70 #include <md5.h> 71 72 #include "pfctl_parser.h" 73 #include "pfctl.h" 74 75 static struct pfctl *pf = NULL; 76 static int debug = 0; 77 static int rulestate = 0; 78 static u_int16_t returnicmpdefault = 79 (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 80 static u_int16_t returnicmp6default = 81 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 82 static int blockpolicy = PFRULE_DROP; 83 static int failpolicy = PFRULE_DROP; 84 static int require_order = 1; 85 static int default_statelock; 86 87 static TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files); 88 static struct file { 89 TAILQ_ENTRY(file) entry; 90 FILE *stream; 91 char *name; 92 int lineno; 93 int errors; 94 } *file; 95 struct file *pushfile(const char *, int); 96 int popfile(void); 97 int check_file_secrecy(int, const char *); 98 int yyparse(void); 99 int yylex(void); 100 int yyerror(const char *, ...); 101 int kw_cmp(const void *, const void *); 102 int lookup(char *); 103 int lgetc(int); 104 int lungetc(int); 105 int findeol(void); 106 107 static TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 108 struct sym { 109 TAILQ_ENTRY(sym) entry; 110 int used; 111 int persist; 112 char *nam; 113 char *val; 114 }; 115 int symset(const char *, const char *, int); 116 char *symget(const char *); 117 118 int atoul(char *, u_long *); 119 120 enum { 121 PFCTL_STATE_NONE, 122 PFCTL_STATE_OPTION, 123 PFCTL_STATE_ETHER, 124 PFCTL_STATE_SCRUB, 125 PFCTL_STATE_QUEUE, 126 PFCTL_STATE_NAT, 127 PFCTL_STATE_FILTER 128 }; 129 130 struct node_etherproto { 131 u_int16_t proto; 132 struct node_etherproto *next; 133 struct node_etherproto *tail; 134 }; 135 136 struct node_proto { 137 u_int8_t proto; 138 struct node_proto *next; 139 struct node_proto *tail; 140 }; 141 142 struct node_port { 143 u_int16_t port[2]; 144 u_int8_t op; 145 struct node_port *next; 146 struct node_port *tail; 147 }; 148 149 struct node_uid { 150 uid_t uid[2]; 151 u_int8_t op; 152 struct node_uid *next; 153 struct node_uid *tail; 154 }; 155 156 struct node_gid { 157 gid_t gid[2]; 158 u_int8_t op; 159 struct node_gid *next; 160 struct node_gid *tail; 161 }; 162 163 struct node_icmp { 164 u_int8_t code; 165 u_int8_t type; 166 u_int8_t proto; 167 struct node_icmp *next; 168 struct node_icmp *tail; 169 }; 170 171 enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK, 172 PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN, 173 PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES, 174 PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK, 175 PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, 176 PF_STATE_OPT_PFLOW }; 177 178 enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE }; 179 180 struct node_state_opt { 181 int type; 182 union { 183 u_int32_t max_states; 184 u_int32_t max_src_states; 185 u_int32_t max_src_conn; 186 struct { 187 u_int32_t limit; 188 u_int32_t seconds; 189 } max_src_conn_rate; 190 struct { 191 u_int8_t flush; 192 char tblname[PF_TABLE_NAME_SIZE]; 193 } overload; 194 u_int32_t max_src_nodes; 195 u_int8_t src_track; 196 u_int32_t statelock; 197 struct { 198 int number; 199 u_int32_t seconds; 200 } timeout; 201 } data; 202 struct node_state_opt *next; 203 struct node_state_opt *tail; 204 }; 205 206 struct peer { 207 struct node_host *host; 208 struct node_port *port; 209 }; 210 211 static struct node_queue { 212 char queue[PF_QNAME_SIZE]; 213 char parent[PF_QNAME_SIZE]; 214 char ifname[IFNAMSIZ]; 215 int scheduler; 216 struct node_queue *next; 217 struct node_queue *tail; 218 } *queues = NULL; 219 220 struct node_qassign { 221 char *qname; 222 char *pqname; 223 }; 224 225 struct range { 226 int a; 227 int b; 228 int t; 229 }; 230 struct redirection { 231 struct node_host *host; 232 struct range rport; 233 }; 234 235 static struct pool_opts { 236 int marker; 237 #define POM_TYPE 0x01 238 #define POM_STICKYADDRESS 0x02 239 #define POM_ENDPI 0x04 240 u_int8_t opts; 241 int type; 242 int staticport; 243 struct pf_poolhashkey *key; 244 struct pf_mape_portset mape; 245 } pool_opts; 246 247 struct redirspec { 248 struct redirection *rdr; 249 struct pool_opts pool_opts; 250 int af; 251 }; 252 253 static struct filter_opts { 254 int marker; 255 #define FOM_FLAGS 0x0001 256 #define FOM_ICMP 0x0002 257 #define FOM_TOS 0x0004 258 #define FOM_KEEP 0x0008 259 #define FOM_SRCTRACK 0x0010 260 #define FOM_MINTTL 0x0020 261 #define FOM_MAXMSS 0x0040 262 #define FOM_AFTO 0x0080 263 #define FOM_SETTOS 0x0100 264 #define FOM_SCRUB_TCP 0x0200 265 #define FOM_SETPRIO 0x0400 266 #define FOM_ONCE 0x1000 /* not yet implemmented */ 267 #define FOM_PRIO 0x2000 268 #define FOM_SETDELAY 0x4000 269 #define FOM_FRAGCACHE 0x8000 /* does not exist in OpenBSD */ 270 struct node_uid *uid; 271 struct node_gid *gid; 272 struct node_if *rcv; 273 struct { 274 u_int8_t b1; 275 u_int8_t b2; 276 u_int16_t w; 277 u_int16_t w2; 278 } flags; 279 struct node_icmp *icmpspec; 280 u_int32_t tos; 281 u_int32_t prob; 282 u_int32_t ridentifier; 283 struct { 284 int action; 285 struct node_state_opt *options; 286 } keep; 287 int fragment; 288 int allowopts; 289 char *label[PF_RULE_MAX_LABEL_COUNT]; 290 int labelcount; 291 struct node_qassign queues; 292 char *tag; 293 char *match_tag; 294 u_int8_t match_tag_not; 295 u_int16_t dnpipe; 296 u_int16_t dnrpipe; 297 u_int32_t free_flags; 298 u_int rtableid; 299 u_int8_t prio; 300 u_int8_t set_prio[2]; 301 struct { 302 struct node_host *addr; 303 u_int16_t port; 304 } divert; 305 struct redirspec nat; 306 struct redirspec rdr; 307 /* new-style scrub opts */ 308 int nodf; 309 int minttl; 310 int settos; 311 int randomid; 312 int max_mss; 313 } filter_opts; 314 315 static struct antispoof_opts { 316 char *label[PF_RULE_MAX_LABEL_COUNT]; 317 int labelcount; 318 u_int32_t ridentifier; 319 u_int rtableid; 320 } antispoof_opts; 321 322 static struct scrub_opts { 323 int marker; 324 int nodf; 325 int minttl; 326 int maxmss; 327 int settos; 328 int fragcache; 329 int randomid; 330 int reassemble_tcp; 331 char *match_tag; 332 u_int8_t match_tag_not; 333 u_int rtableid; 334 } scrub_opts; 335 336 static struct queue_opts { 337 int marker; 338 #define QOM_BWSPEC 0x01 339 #define QOM_SCHEDULER 0x02 340 #define QOM_PRIORITY 0x04 341 #define QOM_TBRSIZE 0x08 342 #define QOM_QLIMIT 0x10 343 struct node_queue_bw queue_bwspec; 344 struct node_queue_opt scheduler; 345 int priority; 346 unsigned int tbrsize; 347 int qlimit; 348 } queue_opts; 349 350 static struct table_opts { 351 int flags; 352 int init_addr; 353 struct node_tinithead init_nodes; 354 } table_opts; 355 356 static struct codel_opts codel_opts; 357 static struct node_hfsc_opts hfsc_opts; 358 static struct node_fairq_opts fairq_opts; 359 static struct node_state_opt *keep_state_defaults = NULL; 360 static struct pfctl_watermarks syncookie_opts; 361 362 int disallow_table(struct node_host *, const char *); 363 int disallow_urpf_failed(struct node_host *, const char *); 364 int disallow_alias(struct node_host *, const char *); 365 int rule_consistent(struct pfctl_rule *, int); 366 int filter_consistent(struct pfctl_rule *, int); 367 int nat_consistent(struct pfctl_rule *); 368 int rdr_consistent(struct pfctl_rule *); 369 int process_tabledef(char *, struct table_opts *); 370 void expand_label_str(char *, size_t, const char *, const char *); 371 void expand_label_if(const char *, char *, size_t, const char *); 372 void expand_label_addr(const char *, char *, size_t, sa_family_t, 373 struct pf_rule_addr *); 374 void expand_label_port(const char *, char *, size_t, 375 struct pf_rule_addr *); 376 void expand_label_proto(const char *, char *, size_t, u_int8_t); 377 void expand_label_nr(const char *, char *, size_t, 378 struct pfctl_rule *); 379 void expand_eth_rule(struct pfctl_eth_rule *, 380 struct node_if *, struct node_etherproto *, 381 struct node_mac *, struct node_mac *, 382 struct node_host *, struct node_host *, const char *, 383 const char *); 384 void expand_rule(struct pfctl_rule *, struct node_if *, 385 struct node_host *, 386 struct node_host *, struct node_proto *, struct node_os *, 387 struct node_host *, struct node_port *, struct node_host *, 388 struct node_port *, struct node_uid *, struct node_gid *, 389 struct node_if *, struct node_icmp *, const char *); 390 int expand_altq(struct pf_altq *, struct node_if *, 391 struct node_queue *, struct node_queue_bw bwspec, 392 struct node_queue_opt *); 393 int expand_queue(struct pf_altq *, struct node_if *, 394 struct node_queue *, struct node_queue_bw, 395 struct node_queue_opt *); 396 int expand_skip_interface(struct node_if *); 397 398 int check_rulestate(int); 399 int getservice(char *); 400 int rule_label(struct pfctl_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]); 401 int eth_rule_label(struct pfctl_eth_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]); 402 int rt_tableid_max(void); 403 404 void mv_rules(struct pfctl_ruleset *, struct pfctl_ruleset *); 405 void mv_eth_rules(struct pfctl_eth_ruleset *, struct pfctl_eth_ruleset *); 406 void decide_address_family(struct node_host *, sa_family_t *); 407 void remove_invalid_hosts(struct node_host **, sa_family_t *); 408 int invalid_redirect(struct node_host *, sa_family_t); 409 u_int16_t parseicmpspec(char *, sa_family_t); 410 int kw_casecmp(const void *, const void *); 411 int map_tos(char *string, int *); 412 struct node_mac* node_mac_from_string(const char *); 413 struct node_mac* node_mac_from_string_masklen(const char *, int); 414 struct node_mac* node_mac_from_string_mask(const char *, const char *); 415 416 static TAILQ_HEAD(loadanchorshead, loadanchors) 417 loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead); 418 419 struct loadanchors { 420 TAILQ_ENTRY(loadanchors) entries; 421 char *anchorname; 422 char *filename; 423 }; 424 425 typedef struct { 426 union { 427 int64_t number; 428 double probability; 429 int i; 430 char *string; 431 u_int rtableid; 432 struct { 433 u_int8_t b1; 434 u_int8_t b2; 435 u_int16_t w; 436 u_int16_t w2; 437 } b; 438 struct range range; 439 struct node_if *interface; 440 struct node_proto *proto; 441 struct node_etherproto *etherproto; 442 struct node_icmp *icmp; 443 struct node_host *host; 444 struct node_os *os; 445 struct node_port *port; 446 struct node_uid *uid; 447 struct node_gid *gid; 448 struct node_state_opt *state_opt; 449 struct peer peer; 450 struct { 451 struct peer src, dst; 452 struct node_os *src_os; 453 } fromto; 454 struct { 455 struct node_mac *src; 456 struct node_mac *dst; 457 } etherfromto; 458 struct node_mac *mac; 459 struct { 460 struct node_mac *mac; 461 } etheraddr; 462 char *bridge_to; 463 struct { 464 struct node_host *host; 465 u_int8_t rt; 466 u_int8_t pool_opts; 467 sa_family_t af; 468 struct pf_poolhashkey *key; 469 } route; 470 struct redirection *redirection; 471 struct { 472 int action; 473 struct node_state_opt *options; 474 } keep_state; 475 struct { 476 u_int8_t log; 477 u_int8_t logif; 478 u_int8_t quick; 479 } logquick; 480 struct { 481 int neg; 482 char *name; 483 } tagged; 484 struct pf_poolhashkey *hashkey; 485 struct node_queue *queue; 486 struct node_queue_opt queue_options; 487 struct node_queue_bw queue_bwspec; 488 struct node_qassign qassign; 489 struct filter_opts filter_opts; 490 struct antispoof_opts antispoof_opts; 491 struct queue_opts queue_opts; 492 struct scrub_opts scrub_opts; 493 struct table_opts table_opts; 494 struct pool_opts pool_opts; 495 struct node_hfsc_opts hfsc_opts; 496 struct node_fairq_opts fairq_opts; 497 struct codel_opts codel_opts; 498 struct pfctl_watermarks *watermarks; 499 } v; 500 int lineno; 501 } YYSTYPE; 502 503 #define PPORT_RANGE 1 504 #define PPORT_STAR 2 505 int parseport(char *, struct range *r, int); 506 507 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \ 508 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \ 509 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1]))) 510 511 %} 512 513 %token PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS 514 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 515 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 516 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 517 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 518 %token REASSEMBLE ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 519 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY 520 %token RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID 521 %token ANTISPOOF FOR INCLUDE KEEPCOUNTERS SYNCOOKIES L3 MATCHES 522 %token ETHER 523 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET 524 %token ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME 525 %token UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL 526 %token DNPIPE DNQUEUE RIDENTIFIER 527 %token LOAD RULESET_OPTIMIZATION PRIO 528 %token STICKYADDRESS ENDPI MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE 529 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY PFLOW 530 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS 531 %token DIVERTTO DIVERTREPLY BRIDGE_TO RECEIVEDON NE LE GE AFTO 532 %token <v.string> STRING 533 %token <v.number> NUMBER 534 %token <v.i> PORTBINARY 535 %type <v.interface> interface if_list if_item_not if_item 536 %type <v.number> number icmptype icmp6type uid gid 537 %type <v.number> tos not yesno optnodf 538 %type <v.probability> probability 539 %type <v.i> no dir af fragcache optimizer syncookie_val 540 %type <v.i> sourcetrack flush unaryop statelock 541 %type <v.i> etherprotoval 542 %type <v.b> action nataction natpasslog scrubaction 543 %type <v.b> flags flag blockspec prio 544 %type <v.range> portplain portstar portrange 545 %type <v.hashkey> hashkey 546 %type <v.proto> proto proto_list proto_item 547 %type <v.number> protoval 548 %type <v.icmp> icmpspec 549 %type <v.icmp> icmp_list icmp_item 550 %type <v.icmp> icmp6_list icmp6_item 551 %type <v.number> reticmpspec reticmp6spec 552 %type <v.fromto> fromto l3fromto 553 %type <v.peer> ipportspec from to 554 %type <v.host> ipspec toipspec xhost host dynaddr host_list 555 %type <v.host> redir_host_list redirspec 556 %type <v.host> route_host route_host_list routespec 557 %type <v.os> os xos os_list 558 %type <v.port> portspec port_list port_item 559 %type <v.uid> uids uid_list uid_item 560 %type <v.gid> gids gid_list gid_item 561 %type <v.route> route 562 %type <v.redirection> redirection redirpool 563 %type <v.string> label stringall tag anchorname 564 %type <v.string> string varstring numberstring 565 %type <v.keep_state> keep 566 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item 567 %type <v.logquick> logquick quick log logopts logopt 568 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if 569 %type <v.qassign> qname etherqname 570 %type <v.queue> qassign qassign_list qassign_item 571 %type <v.queue_options> scheduler 572 %type <v.number> cbqflags_list cbqflags_item 573 %type <v.number> priqflags_list priqflags_item 574 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 575 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts 576 %type <v.codel_opts> codelopts_list codelopts_item codel_opts 577 %type <v.queue_bwspec> bandwidth 578 %type <v.filter_opts> filter_opts filter_opt filter_opts_l etherfilter_opts etherfilter_opt etherfilter_opts_l 579 %type <v.filter_opts> filter_sets filter_set filter_sets_l 580 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 581 %type <v.queue_opts> queue_opts queue_opt queue_opts_l 582 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 583 %type <v.table_opts> table_opts table_opt table_opts_l 584 %type <v.pool_opts> pool_opts pool_opt pool_opts_l 585 %type <v.tagged> tagged 586 %type <v.rtableid> rtable 587 %type <v.watermarks> syncookie_opts 588 %type <v.etherproto> etherproto etherproto_list etherproto_item 589 %type <v.etherfromto> etherfromto 590 %type <v.etheraddr> etherfrom etherto 591 %type <v.bridge_to> bridge 592 %type <v.mac> xmac mac mac_list macspec 593 %% 594 595 ruleset : /* empty */ 596 | ruleset include '\n' 597 | ruleset '\n' 598 | ruleset option '\n' 599 | ruleset etherrule '\n' 600 | ruleset etheranchorrule '\n' 601 | ruleset scrubrule '\n' 602 | ruleset natrule '\n' 603 | ruleset binatrule '\n' 604 | ruleset pfrule '\n' 605 | ruleset anchorrule '\n' 606 | ruleset loadrule '\n' 607 | ruleset altqif '\n' 608 | ruleset queuespec '\n' 609 | ruleset varset '\n' 610 | ruleset antispoof '\n' 611 | ruleset tabledef '\n' 612 | '{' fakeanchor '}' '\n'; 613 | ruleset error '\n' { file->errors++; } 614 ; 615 616 include : INCLUDE STRING { 617 struct file *nfile; 618 619 if ((nfile = pushfile($2, 0)) == NULL) { 620 yyerror("failed to include file %s", $2); 621 free($2); 622 YYERROR; 623 } 624 free($2); 625 626 file = nfile; 627 lungetc('\n'); 628 } 629 ; 630 631 /* 632 * apply to previouslys specified rule: must be careful to note 633 * what that is: pf or nat or binat or rdr 634 */ 635 fakeanchor : fakeanchor '\n' 636 | fakeanchor anchorrule '\n' 637 | fakeanchor binatrule '\n' 638 | fakeanchor natrule '\n' 639 | fakeanchor pfrule '\n' 640 | fakeanchor error '\n' 641 ; 642 643 optimizer : string { 644 if (!strcmp($1, "none")) 645 $$ = 0; 646 else if (!strcmp($1, "basic")) 647 $$ = PF_OPTIMIZE_BASIC; 648 else if (!strcmp($1, "profile")) 649 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE; 650 else { 651 yyerror("unknown ruleset-optimization %s", $1); 652 YYERROR; 653 } 654 } 655 ; 656 657 optnodf : /* empty */ { $$ = 0; } 658 | NODF { $$ = 1; } 659 ; 660 661 option : SET REASSEMBLE yesno optnodf { 662 if (check_rulestate(PFCTL_STATE_OPTION)) 663 YYERROR; 664 pfctl_set_reassembly(pf, $3, $4); 665 } 666 | SET OPTIMIZATION STRING { 667 if (check_rulestate(PFCTL_STATE_OPTION)) { 668 free($3); 669 YYERROR; 670 } 671 if (pfctl_set_optimization(pf, $3) != 0) { 672 yyerror("unknown optimization %s", $3); 673 free($3); 674 YYERROR; 675 } 676 free($3); 677 } 678 | SET RULESET_OPTIMIZATION optimizer { 679 if (!(pf->opts & PF_OPT_OPTIMIZE)) { 680 pf->opts |= PF_OPT_OPTIMIZE; 681 pf->optimize = $3; 682 } 683 } 684 | SET TIMEOUT timeout_spec 685 | SET TIMEOUT '{' optnl timeout_list '}' 686 | SET LIMIT limit_spec 687 | SET LIMIT '{' optnl limit_list '}' 688 | SET LOGINTERFACE stringall { 689 if (check_rulestate(PFCTL_STATE_OPTION)) { 690 free($3); 691 YYERROR; 692 } 693 if (pfctl_set_logif(pf, $3) != 0) { 694 yyerror("error setting loginterface %s", $3); 695 free($3); 696 YYERROR; 697 } 698 free($3); 699 } 700 | SET HOSTID number { 701 if ($3 == 0 || $3 > UINT_MAX) { 702 yyerror("hostid must be non-zero"); 703 YYERROR; 704 } 705 if (pfctl_set_hostid(pf, $3) != 0) { 706 yyerror("error setting hostid %08x", $3); 707 YYERROR; 708 } 709 } 710 | SET BLOCKPOLICY DROP { 711 if (pf->opts & PF_OPT_VERBOSE) 712 printf("set block-policy drop\n"); 713 if (check_rulestate(PFCTL_STATE_OPTION)) 714 YYERROR; 715 blockpolicy = PFRULE_DROP; 716 } 717 | SET BLOCKPOLICY RETURN { 718 if (pf->opts & PF_OPT_VERBOSE) 719 printf("set block-policy return\n"); 720 if (check_rulestate(PFCTL_STATE_OPTION)) 721 YYERROR; 722 blockpolicy = PFRULE_RETURN; 723 } 724 | SET FAILPOLICY DROP { 725 if (pf->opts & PF_OPT_VERBOSE) 726 printf("set fail-policy drop\n"); 727 if (check_rulestate(PFCTL_STATE_OPTION)) 728 YYERROR; 729 failpolicy = PFRULE_DROP; 730 } 731 | SET FAILPOLICY RETURN { 732 if (pf->opts & PF_OPT_VERBOSE) 733 printf("set fail-policy return\n"); 734 if (check_rulestate(PFCTL_STATE_OPTION)) 735 YYERROR; 736 failpolicy = PFRULE_RETURN; 737 } 738 | SET REQUIREORDER yesno { 739 if (pf->opts & PF_OPT_VERBOSE) 740 printf("set require-order %s\n", 741 $3 == 1 ? "yes" : "no"); 742 require_order = $3; 743 } 744 | SET FINGERPRINTS STRING { 745 if (pf->opts & PF_OPT_VERBOSE) 746 printf("set fingerprints \"%s\"\n", $3); 747 if (check_rulestate(PFCTL_STATE_OPTION)) { 748 free($3); 749 YYERROR; 750 } 751 if (!pf->anchor->name[0]) { 752 if (pfctl_file_fingerprints(pf->dev, 753 pf->opts, $3)) { 754 yyerror("error loading " 755 "fingerprints %s", $3); 756 free($3); 757 YYERROR; 758 } 759 } 760 free($3); 761 } 762 | SET STATEPOLICY statelock { 763 if (pf->opts & PF_OPT_VERBOSE) 764 switch ($3) { 765 case 0: 766 printf("set state-policy floating\n"); 767 break; 768 case PFRULE_IFBOUND: 769 printf("set state-policy if-bound\n"); 770 break; 771 } 772 default_statelock = $3; 773 } 774 | SET DEBUG STRING { 775 if (check_rulestate(PFCTL_STATE_OPTION)) { 776 free($3); 777 YYERROR; 778 } 779 if (pfctl_do_set_debug(pf, $3) != 0) { 780 yyerror("error setting debuglevel %s", $3); 781 free($3); 782 YYERROR; 783 } 784 free($3); 785 } 786 | SET SKIP interface { 787 if (expand_skip_interface($3) != 0) { 788 yyerror("error setting skip interface(s)"); 789 YYERROR; 790 } 791 } 792 | SET STATEDEFAULTS state_opt_list { 793 if (keep_state_defaults != NULL) { 794 yyerror("cannot redefine state-defaults"); 795 YYERROR; 796 } 797 keep_state_defaults = $3; 798 } 799 | SET KEEPCOUNTERS { 800 pf->keep_counters = true; 801 } 802 | SET SYNCOOKIES syncookie_val syncookie_opts { 803 if (pfctl_cfg_syncookies(pf, $3, $4)) { 804 yyerror("error setting syncookies"); 805 YYERROR; 806 } 807 } 808 ; 809 810 syncookie_val : STRING { 811 if (!strcmp($1, "never")) 812 $$ = PFCTL_SYNCOOKIES_NEVER; 813 else if (!strcmp($1, "adaptive")) 814 $$ = PFCTL_SYNCOOKIES_ADAPTIVE; 815 else if (!strcmp($1, "always")) 816 $$ = PFCTL_SYNCOOKIES_ALWAYS; 817 else { 818 yyerror("illegal value for syncookies"); 819 YYERROR; 820 } 821 } 822 ; 823 syncookie_opts : /* empty */ { $$ = NULL; } 824 | { 825 memset(&syncookie_opts, 0, sizeof(syncookie_opts)); 826 } '(' syncookie_opt_l ')' { $$ = &syncookie_opts; } 827 ; 828 829 syncookie_opt_l : syncookie_opt_l comma syncookie_opt 830 | syncookie_opt 831 ; 832 833 syncookie_opt : STRING STRING { 834 double val; 835 char *cp; 836 837 val = strtod($2, &cp); 838 if (cp == NULL || strcmp(cp, "%")) 839 YYERROR; 840 if (val <= 0 || val > 100) { 841 yyerror("illegal percentage value"); 842 YYERROR; 843 } 844 if (!strcmp($1, "start")) { 845 syncookie_opts.hi = val; 846 } else if (!strcmp($1, "end")) { 847 syncookie_opts.lo = val; 848 } else { 849 yyerror("illegal syncookie option"); 850 YYERROR; 851 } 852 } 853 ; 854 855 stringall : STRING { $$ = $1; } 856 | ALL { 857 if (($$ = strdup("all")) == NULL) { 858 err(1, "stringall: strdup"); 859 } 860 } 861 ; 862 863 string : STRING string { 864 if (asprintf(&$$, "%s %s", $1, $2) == -1) 865 err(1, "string: asprintf"); 866 free($1); 867 free($2); 868 } 869 | STRING 870 ; 871 872 varstring : numberstring varstring { 873 if (asprintf(&$$, "%s %s", $1, $2) == -1) 874 err(1, "string: asprintf"); 875 free($1); 876 free($2); 877 } 878 | numberstring 879 ; 880 881 numberstring : NUMBER { 882 char *s; 883 if (asprintf(&s, "%lld", (long long)$1) == -1) { 884 yyerror("string: asprintf"); 885 YYERROR; 886 } 887 $$ = s; 888 } 889 | STRING 890 ; 891 892 varset : STRING '=' varstring { 893 char *s = $1; 894 if (pf->opts & PF_OPT_VERBOSE) 895 printf("%s = \"%s\"\n", $1, $3); 896 while (*s++) { 897 if (isspace((unsigned char)*s)) { 898 yyerror("macro name cannot contain " 899 "whitespace"); 900 YYERROR; 901 } 902 } 903 if (symset($1, $3, 0) == -1) 904 err(1, "cannot store variable %s", $1); 905 free($1); 906 free($3); 907 } 908 ; 909 910 anchorname : STRING { $$ = $1; } 911 | /* empty */ { $$ = NULL; } 912 ; 913 914 pfa_anchorlist : /* empty */ 915 | pfa_anchorlist '\n' 916 | pfa_anchorlist pfrule '\n' 917 | pfa_anchorlist anchorrule '\n' 918 ; 919 920 pfa_anchor : '{' 921 { 922 char ta[PF_ANCHOR_NAME_SIZE]; 923 struct pfctl_ruleset *rs; 924 925 /* stepping into a brace anchor */ 926 pf->asd++; 927 pf->bn++; 928 929 /* 930 * Anchor contents are parsed before the anchor rule 931 * production completes, so we don't know the real 932 * location yet. Create a holding ruleset in the root; 933 * contents will be moved afterwards. 934 */ 935 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 936 rs = pf_find_or_create_ruleset(ta); 937 if (rs == NULL) 938 err(1, "pfa_anchor: pf_find_or_create_ruleset"); 939 pf->astack[pf->asd] = rs->anchor; 940 pf->anchor = rs->anchor; 941 } '\n' pfa_anchorlist '}' 942 { 943 pf->alast = pf->anchor; 944 pf->asd--; 945 pf->anchor = pf->astack[pf->asd]; 946 } 947 | /* empty */ 948 ; 949 950 anchorrule : ANCHOR anchorname dir quick interface af proto fromto 951 filter_opts pfa_anchor 952 { 953 struct pfctl_rule r; 954 struct node_proto *proto; 955 956 if (check_rulestate(PFCTL_STATE_FILTER)) { 957 if ($2) 958 free($2); 959 YYERROR; 960 } 961 962 if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) { 963 free($2); 964 yyerror("anchor names beginning with '_' " 965 "are reserved for internal use"); 966 YYERROR; 967 } 968 969 memset(&r, 0, sizeof(r)); 970 if (pf->astack[pf->asd + 1]) { 971 if ($2 && strchr($2, '/') != NULL) { 972 free($2); 973 yyerror("anchor paths containing '/' " 974 "cannot be used for inline anchors."); 975 YYERROR; 976 } 977 978 /* Move inline rules into relative location. */ 979 pfctl_anchor_setup(&r, 980 &pf->astack[pf->asd]->ruleset, 981 $2 ? $2 : pf->alast->name); 982 983 if (r.anchor == NULL) 984 err(1, "anchorrule: unable to " 985 "create ruleset"); 986 987 if (pf->alast != r.anchor) { 988 if (r.anchor->match) { 989 yyerror("inline anchor '%s' " 990 "already exists", 991 r.anchor->name); 992 YYERROR; 993 } 994 mv_rules(&pf->alast->ruleset, 995 &r.anchor->ruleset); 996 } 997 pf_remove_if_empty_ruleset(&pf->alast->ruleset); 998 pf->alast = r.anchor; 999 } else { 1000 if (!$2) { 1001 yyerror("anchors without explicit " 1002 "rules must specify a name"); 1003 YYERROR; 1004 } 1005 } 1006 r.direction = $3; 1007 r.quick = $4.quick; 1008 r.af = $6; 1009 r.prob = $9.prob; 1010 r.rtableid = $9.rtableid; 1011 r.ridentifier = $9.ridentifier; 1012 1013 if ($9.tag) 1014 if (strlcpy(r.tagname, $9.tag, 1015 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1016 yyerror("tag too long, max %u chars", 1017 PF_TAG_NAME_SIZE - 1); 1018 YYERROR; 1019 } 1020 if ($9.match_tag) 1021 if (strlcpy(r.match_tagname, $9.match_tag, 1022 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1023 yyerror("tag too long, max %u chars", 1024 PF_TAG_NAME_SIZE - 1); 1025 YYERROR; 1026 } 1027 r.match_tag_not = $9.match_tag_not; 1028 if (rule_label(&r, $9.label)) 1029 YYERROR; 1030 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1031 free($9.label[i]); 1032 r.flags = $9.flags.b1; 1033 r.flagset = $9.flags.b2; 1034 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 1035 yyerror("flags always false"); 1036 YYERROR; 1037 } 1038 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 1039 for (proto = $7; proto != NULL && 1040 proto->proto != IPPROTO_TCP; 1041 proto = proto->next) 1042 ; /* nothing */ 1043 if (proto == NULL && $7 != NULL) { 1044 if ($9.flags.b1 || $9.flags.b2) 1045 yyerror( 1046 "flags only apply to tcp"); 1047 if ($8.src_os) 1048 yyerror( 1049 "OS fingerprinting only " 1050 "applies to tcp"); 1051 YYERROR; 1052 } 1053 } 1054 1055 r.tos = $9.tos; 1056 1057 if ($9.keep.action) { 1058 yyerror("cannot specify state handling " 1059 "on anchors"); 1060 YYERROR; 1061 } 1062 1063 if ($9.match_tag) 1064 if (strlcpy(r.match_tagname, $9.match_tag, 1065 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1066 yyerror("tag too long, max %u chars", 1067 PF_TAG_NAME_SIZE - 1); 1068 YYERROR; 1069 } 1070 r.match_tag_not = $9.match_tag_not; 1071 if ($9.marker & FOM_PRIO) { 1072 if ($9.prio == 0) 1073 r.prio = PF_PRIO_ZERO; 1074 else 1075 r.prio = $9.prio; 1076 } 1077 if ($9.marker & FOM_SETPRIO) { 1078 r.set_prio[0] = $9.set_prio[0]; 1079 r.set_prio[1] = $9.set_prio[1]; 1080 r.scrub_flags |= PFSTATE_SETPRIO; 1081 } 1082 1083 decide_address_family($8.src.host, &r.af); 1084 decide_address_family($8.dst.host, &r.af); 1085 r.naf = r.af; 1086 1087 expand_rule(&r, $5, NULL, NULL, $7, $8.src_os, 1088 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 1089 $9.uid, $9.gid, $9.rcv, $9.icmpspec, 1090 pf->astack[pf->asd + 1] ? pf->alast->name : $2); 1091 free($2); 1092 pf->astack[pf->asd + 1] = NULL; 1093 } 1094 | NATANCHOR string interface af proto fromto rtable { 1095 struct pfctl_rule r; 1096 1097 if (check_rulestate(PFCTL_STATE_NAT)) { 1098 free($2); 1099 YYERROR; 1100 } 1101 1102 memset(&r, 0, sizeof(r)); 1103 r.action = PF_NAT; 1104 r.af = $4; 1105 r.rtableid = $7; 1106 1107 decide_address_family($6.src.host, &r.af); 1108 decide_address_family($6.dst.host, &r.af); 1109 1110 expand_rule(&r, $3, NULL, NULL, $5, $6.src_os, 1111 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 1112 0, 0, 0, 0, $2); 1113 free($2); 1114 } 1115 | RDRANCHOR string interface af proto fromto rtable { 1116 struct pfctl_rule r; 1117 1118 if (check_rulestate(PFCTL_STATE_NAT)) { 1119 free($2); 1120 YYERROR; 1121 } 1122 1123 memset(&r, 0, sizeof(r)); 1124 r.action = PF_RDR; 1125 r.af = $4; 1126 r.rtableid = $7; 1127 1128 decide_address_family($6.src.host, &r.af); 1129 decide_address_family($6.dst.host, &r.af); 1130 1131 if ($6.src.port != NULL) { 1132 yyerror("source port parameter not supported" 1133 " in rdr-anchor"); 1134 YYERROR; 1135 } 1136 if ($6.dst.port != NULL) { 1137 if ($6.dst.port->next != NULL) { 1138 yyerror("destination port list " 1139 "expansion not supported in " 1140 "rdr-anchor"); 1141 YYERROR; 1142 } else if ($6.dst.port->op != PF_OP_EQ) { 1143 yyerror("destination port operators" 1144 " not supported in rdr-anchor"); 1145 YYERROR; 1146 } 1147 r.dst.port[0] = $6.dst.port->port[0]; 1148 r.dst.port[1] = $6.dst.port->port[1]; 1149 r.dst.port_op = $6.dst.port->op; 1150 } 1151 1152 expand_rule(&r, $3, NULL, NULL, $5, $6.src_os, 1153 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 1154 0, 0, 0, 0, $2); 1155 free($2); 1156 } 1157 | BINATANCHOR string interface af proto fromto rtable { 1158 struct pfctl_rule r; 1159 1160 if (check_rulestate(PFCTL_STATE_NAT)) { 1161 free($2); 1162 YYERROR; 1163 } 1164 1165 memset(&r, 0, sizeof(r)); 1166 r.action = PF_BINAT; 1167 r.af = $4; 1168 r.rtableid = $7; 1169 if ($5 != NULL) { 1170 if ($5->next != NULL) { 1171 yyerror("proto list expansion" 1172 " not supported in binat-anchor"); 1173 YYERROR; 1174 } 1175 r.proto = $5->proto; 1176 free($5); 1177 } 1178 1179 if ($6.src.host != NULL || $6.src.port != NULL || 1180 $6.dst.host != NULL || $6.dst.port != NULL) { 1181 yyerror("fromto parameter not supported" 1182 " in binat-anchor"); 1183 YYERROR; 1184 } 1185 1186 decide_address_family($6.src.host, &r.af); 1187 decide_address_family($6.dst.host, &r.af); 1188 1189 pfctl_append_rule(pf, &r, $2); 1190 free($2); 1191 } 1192 ; 1193 1194 loadrule : LOAD ANCHOR string FROM string { 1195 struct loadanchors *loadanchor; 1196 1197 if (strlen(pf->anchor->name) + 1 + 1198 strlen($3) >= MAXPATHLEN) { 1199 yyerror("anchorname %s too long, max %u\n", 1200 $3, MAXPATHLEN - 1); 1201 free($3); 1202 YYERROR; 1203 } 1204 loadanchor = calloc(1, sizeof(struct loadanchors)); 1205 if (loadanchor == NULL) 1206 err(1, "loadrule: calloc"); 1207 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) == 1208 NULL) 1209 err(1, "loadrule: malloc"); 1210 if (pf->anchor->name[0]) 1211 snprintf(loadanchor->anchorname, MAXPATHLEN, 1212 "%s/%s", pf->anchor->name, $3); 1213 else 1214 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN); 1215 if ((loadanchor->filename = strdup($5)) == NULL) 1216 err(1, "loadrule: strdup"); 1217 1218 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 1219 entries); 1220 1221 free($3); 1222 free($5); 1223 }; 1224 1225 scrubaction : no SCRUB { 1226 $$.b2 = $$.w = 0; 1227 if ($1) 1228 $$.b1 = PF_NOSCRUB; 1229 else 1230 $$.b1 = PF_SCRUB; 1231 } 1232 ; 1233 1234 etherrule : ETHER action dir quick interface bridge etherproto etherfromto l3fromto etherfilter_opts 1235 { 1236 struct pfctl_eth_rule r; 1237 1238 bzero(&r, sizeof(r)); 1239 1240 if (check_rulestate(PFCTL_STATE_ETHER)) 1241 YYERROR; 1242 1243 r.action = $2.b1; 1244 r.direction = $3; 1245 r.quick = $4.quick; 1246 if ($10.tag != NULL) 1247 strlcpy(r.tagname, $10.tag, sizeof(r.tagname)); 1248 if ($10.match_tag) 1249 if (strlcpy(r.match_tagname, $10.match_tag, 1250 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1251 yyerror("tag too long, max %u chars", 1252 PF_TAG_NAME_SIZE - 1); 1253 YYERROR; 1254 } 1255 r.match_tag_not = $10.match_tag_not; 1256 if ($10.queues.qname != NULL) 1257 strlcpy(r.qname, $10.queues.qname, sizeof(r.qname)); 1258 r.dnpipe = $10.dnpipe; 1259 r.dnflags = $10.free_flags; 1260 if (eth_rule_label(&r, $10.label)) 1261 YYERROR; 1262 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1263 free($10.label[i]); 1264 r.ridentifier = $10.ridentifier; 1265 1266 expand_eth_rule(&r, $5, $7, $8.src, $8.dst, 1267 $9.src.host, $9.dst.host, $6, ""); 1268 } 1269 ; 1270 1271 etherpfa_anchorlist : /* empty */ 1272 | etherpfa_anchorlist '\n' 1273 | etherpfa_anchorlist etherrule '\n' 1274 | etherpfa_anchorlist etheranchorrule '\n' 1275 ; 1276 1277 etherpfa_anchor : '{' 1278 { 1279 char ta[PF_ANCHOR_NAME_SIZE]; 1280 struct pfctl_eth_ruleset *rs; 1281 1282 /* steping into a brace anchor */ 1283 pf->asd++; 1284 pf->bn++; 1285 1286 /* create a holding ruleset in the root */ 1287 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 1288 rs = pf_find_or_create_eth_ruleset(ta); 1289 if (rs == NULL) 1290 err(1, "etherpfa_anchor: pf_find_or_create_eth_ruleset"); 1291 pf->eastack[pf->asd] = rs->anchor; 1292 pf->eanchor = rs->anchor; 1293 } '\n' etherpfa_anchorlist '}' 1294 { 1295 pf->ealast = pf->eanchor; 1296 pf->asd--; 1297 pf->eanchor = pf->eastack[pf->asd]; 1298 } 1299 | /* empty */ 1300 ; 1301 1302 etheranchorrule : ETHER ANCHOR anchorname dir quick interface etherproto etherfromto l3fromto etherpfa_anchor 1303 { 1304 struct pfctl_eth_rule r; 1305 1306 if (check_rulestate(PFCTL_STATE_ETHER)) { 1307 free($3); 1308 YYERROR; 1309 } 1310 1311 if ($3 && ($3[0] == '_' || strstr($3, "/_") != NULL)) { 1312 free($3); 1313 yyerror("anchor names beginning with '_' " 1314 "are reserved for internal use"); 1315 YYERROR; 1316 } 1317 1318 memset(&r, 0, sizeof(r)); 1319 if (pf->eastack[pf->asd + 1]) { 1320 if ($3 && strchr($3, '/') != NULL) { 1321 free($3); 1322 yyerror("anchor paths containing '/' " 1323 "cannot be used for inline anchors."); 1324 YYERROR; 1325 } 1326 1327 /* Move inline rules into relative location. */ 1328 pfctl_eth_anchor_setup(pf, &r, 1329 &pf->eastack[pf->asd]->ruleset, 1330 $3 ? $3 : pf->ealast->name); 1331 if (r.anchor == NULL) 1332 err(1, "etheranchorrule: unable to " 1333 "create ruleset"); 1334 1335 if (pf->ealast != r.anchor) { 1336 if (r.anchor->match) { 1337 yyerror("inline anchor '%s' " 1338 "already exists", 1339 r.anchor->name); 1340 YYERROR; 1341 } 1342 mv_eth_rules(&pf->ealast->ruleset, 1343 &r.anchor->ruleset); 1344 } 1345 pf_remove_if_empty_eth_ruleset(&pf->ealast->ruleset); 1346 pf->ealast = r.anchor; 1347 } else { 1348 if (!$3) { 1349 yyerror("anchors without explicit " 1350 "rules must specify a name"); 1351 YYERROR; 1352 } 1353 } 1354 1355 r.direction = $4; 1356 r.quick = $5.quick; 1357 1358 expand_eth_rule(&r, $6, $7, $8.src, $8.dst, 1359 $9.src.host, $9.dst.host, NULL, 1360 pf->eastack[pf->asd + 1] ? pf->ealast->name : $3); 1361 1362 free($3); 1363 pf->eastack[pf->asd + 1] = NULL; 1364 } 1365 ; 1366 1367 etherfilter_opts : { 1368 bzero(&filter_opts, sizeof filter_opts); 1369 } 1370 etherfilter_opts_l 1371 { $$ = filter_opts; } 1372 | /* empty */ { 1373 bzero(&filter_opts, sizeof filter_opts); 1374 $$ = filter_opts; 1375 } 1376 ; 1377 1378 etherfilter_opts_l : etherfilter_opts_l etherfilter_opt 1379 | etherfilter_opt 1380 1381 etherfilter_opt : etherqname { 1382 if (filter_opts.queues.qname) { 1383 yyerror("queue cannot be redefined"); 1384 YYERROR; 1385 } 1386 filter_opts.queues = $1; 1387 } 1388 | RIDENTIFIER number { 1389 filter_opts.ridentifier = $2; 1390 } 1391 | label { 1392 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 1393 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 1394 YYERROR; 1395 } 1396 filter_opts.label[filter_opts.labelcount++] = $1; 1397 } 1398 | TAG string { 1399 filter_opts.tag = $2; 1400 } 1401 | not TAGGED string { 1402 filter_opts.match_tag = $3; 1403 filter_opts.match_tag_not = $1; 1404 } 1405 | DNPIPE number { 1406 filter_opts.dnpipe = $2; 1407 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 1408 } 1409 | DNQUEUE number { 1410 filter_opts.dnpipe = $2; 1411 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 1412 } 1413 ; 1414 1415 bridge : /* empty */ { 1416 $$ = NULL; 1417 } 1418 | BRIDGE_TO STRING { 1419 $$ = strdup($2); 1420 } 1421 ; 1422 1423 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts 1424 { 1425 struct pfctl_rule r; 1426 1427 if (check_rulestate(PFCTL_STATE_SCRUB)) 1428 YYERROR; 1429 1430 memset(&r, 0, sizeof(r)); 1431 1432 r.action = $1.b1; 1433 r.direction = $2; 1434 1435 r.log = $3.log; 1436 r.logif = $3.logif; 1437 if ($3.quick) { 1438 yyerror("scrub rules do not support 'quick'"); 1439 YYERROR; 1440 } 1441 1442 r.af = $5; 1443 if ($8.nodf) 1444 r.rule_flag |= PFRULE_NODF; 1445 if ($8.randomid) 1446 r.rule_flag |= PFRULE_RANDOMID; 1447 if ($8.reassemble_tcp) { 1448 if (r.direction != PF_INOUT) { 1449 yyerror("reassemble tcp rules can not " 1450 "specify direction"); 1451 YYERROR; 1452 } 1453 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 1454 } 1455 if ($8.minttl) 1456 r.min_ttl = $8.minttl; 1457 if ($8.maxmss) 1458 r.max_mss = $8.maxmss; 1459 if ($8.marker & FOM_SETTOS) { 1460 r.rule_flag |= PFRULE_SET_TOS; 1461 r.set_tos = $8.settos; 1462 } 1463 if ($8.fragcache) 1464 r.rule_flag |= $8.fragcache; 1465 if ($8.match_tag) 1466 if (strlcpy(r.match_tagname, $8.match_tag, 1467 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1468 yyerror("tag too long, max %u chars", 1469 PF_TAG_NAME_SIZE - 1); 1470 YYERROR; 1471 } 1472 r.match_tag_not = $8.match_tag_not; 1473 r.rtableid = $8.rtableid; 1474 1475 expand_rule(&r, $4, NULL, NULL, $6, $7.src_os, 1476 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 1477 NULL, NULL, NULL, NULL, ""); 1478 } 1479 ; 1480 1481 scrub_opts : { 1482 bzero(&scrub_opts, sizeof scrub_opts); 1483 scrub_opts.rtableid = -1; 1484 } 1485 scrub_opts_l 1486 { $$ = scrub_opts; } 1487 | /* empty */ { 1488 bzero(&scrub_opts, sizeof scrub_opts); 1489 scrub_opts.rtableid = -1; 1490 $$ = scrub_opts; 1491 } 1492 ; 1493 1494 scrub_opts_l : scrub_opts_l comma scrub_opt 1495 | scrub_opt 1496 ; 1497 1498 scrub_opt : NODF { 1499 if (scrub_opts.nodf) { 1500 yyerror("no-df cannot be respecified"); 1501 YYERROR; 1502 } 1503 scrub_opts.nodf = 1; 1504 } 1505 | MINTTL NUMBER { 1506 if (scrub_opts.marker & FOM_MINTTL) { 1507 yyerror("min-ttl cannot be respecified"); 1508 YYERROR; 1509 } 1510 if ($2 < 0 || $2 > 255) { 1511 yyerror("illegal min-ttl value %d", $2); 1512 YYERROR; 1513 } 1514 scrub_opts.marker |= FOM_MINTTL; 1515 scrub_opts.minttl = $2; 1516 } 1517 | MAXMSS NUMBER { 1518 if (scrub_opts.marker & FOM_MAXMSS) { 1519 yyerror("max-mss cannot be respecified"); 1520 YYERROR; 1521 } 1522 if ($2 < 0 || $2 > 65535) { 1523 yyerror("illegal max-mss value %d", $2); 1524 YYERROR; 1525 } 1526 scrub_opts.marker |= FOM_MAXMSS; 1527 scrub_opts.maxmss = $2; 1528 } 1529 | SETTOS tos { 1530 if (scrub_opts.marker & FOM_SETTOS) { 1531 yyerror("set-tos cannot be respecified"); 1532 YYERROR; 1533 } 1534 scrub_opts.marker |= FOM_SETTOS; 1535 scrub_opts.settos = $2; 1536 } 1537 | fragcache { 1538 if (scrub_opts.marker & FOM_FRAGCACHE) { 1539 yyerror("fragcache cannot be respecified"); 1540 YYERROR; 1541 } 1542 scrub_opts.marker |= FOM_FRAGCACHE; 1543 scrub_opts.fragcache = $1; 1544 } 1545 | REASSEMBLE STRING { 1546 if (strcasecmp($2, "tcp") != 0) { 1547 yyerror("scrub reassemble supports only tcp, " 1548 "not '%s'", $2); 1549 free($2); 1550 YYERROR; 1551 } 1552 free($2); 1553 if (scrub_opts.reassemble_tcp) { 1554 yyerror("reassemble tcp cannot be respecified"); 1555 YYERROR; 1556 } 1557 scrub_opts.reassemble_tcp = 1; 1558 } 1559 | RANDOMID { 1560 if (scrub_opts.randomid) { 1561 yyerror("random-id cannot be respecified"); 1562 YYERROR; 1563 } 1564 scrub_opts.randomid = 1; 1565 } 1566 | RTABLE NUMBER { 1567 if ($2 < 0 || $2 > rt_tableid_max()) { 1568 yyerror("invalid rtable id"); 1569 YYERROR; 1570 } 1571 scrub_opts.rtableid = $2; 1572 } 1573 | not TAGGED string { 1574 scrub_opts.match_tag = $3; 1575 scrub_opts.match_tag_not = $1; 1576 } 1577 ; 1578 1579 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 1580 | FRAGMENT NO REASSEMBLE { $$ = PFRULE_FRAGMENT_NOREASS; } 1581 ; 1582 1583 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 1584 struct pfctl_rule r; 1585 struct node_host *h = NULL, *hh; 1586 struct node_if *i, *j; 1587 1588 if (check_rulestate(PFCTL_STATE_FILTER)) 1589 YYERROR; 1590 1591 for (i = $3; i; i = i->next) { 1592 bzero(&r, sizeof(r)); 1593 1594 r.action = PF_DROP; 1595 r.direction = PF_IN; 1596 r.log = $2.log; 1597 r.logif = $2.logif; 1598 r.quick = $2.quick; 1599 r.af = $4; 1600 r.ridentifier = $5.ridentifier; 1601 if (rule_label(&r, $5.label)) 1602 YYERROR; 1603 r.rtableid = $5.rtableid; 1604 j = calloc(1, sizeof(struct node_if)); 1605 if (j == NULL) 1606 err(1, "antispoof: calloc"); 1607 if (strlcpy(j->ifname, i->ifname, 1608 sizeof(j->ifname)) >= sizeof(j->ifname)) { 1609 free(j); 1610 yyerror("interface name too long"); 1611 YYERROR; 1612 } 1613 j->not = 1; 1614 if (i->dynamic) { 1615 h = calloc(1, sizeof(*h)); 1616 if (h == NULL) 1617 err(1, "address: calloc"); 1618 h->addr.type = PF_ADDR_DYNIFTL; 1619 set_ipmask(h, 128); 1620 if (strlcpy(h->addr.v.ifname, i->ifname, 1621 sizeof(h->addr.v.ifname)) >= 1622 sizeof(h->addr.v.ifname)) { 1623 free(h); 1624 yyerror( 1625 "interface name too long"); 1626 YYERROR; 1627 } 1628 hh = malloc(sizeof(*hh)); 1629 if (hh == NULL) 1630 err(1, "address: malloc"); 1631 bcopy(h, hh, sizeof(*hh)); 1632 h->addr.iflags = PFI_AFLAG_NETWORK; 1633 } else { 1634 h = ifa_lookup(j->ifname, 1635 PFI_AFLAG_NETWORK); 1636 hh = NULL; 1637 } 1638 1639 if (h != NULL) 1640 expand_rule(&r, j, NULL, NULL, NULL, NULL, h, 1641 NULL, NULL, NULL, NULL, NULL, 1642 NULL, NULL, ""); 1643 1644 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 1645 bzero(&r, sizeof(r)); 1646 1647 r.action = PF_DROP; 1648 r.direction = PF_IN; 1649 r.log = $2.log; 1650 r.logif = $2.logif; 1651 r.quick = $2.quick; 1652 r.af = $4; 1653 r.ridentifier = $5.ridentifier; 1654 if (rule_label(&r, $5.label)) 1655 YYERROR; 1656 r.rtableid = $5.rtableid; 1657 if (hh != NULL) 1658 h = hh; 1659 else 1660 h = ifa_lookup(i->ifname, 0); 1661 if (h != NULL) 1662 expand_rule(&r, NULL, NULL, NULL, 1663 NULL, NULL, h, NULL, NULL, 1664 NULL, NULL, NULL, NULL, NULL, ""); 1665 } else 1666 free(hh); 1667 } 1668 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1669 free($5.label[i]); 1670 } 1671 ; 1672 1673 antispoof_ifspc : FOR antispoof_if { $$ = $2; } 1674 | FOR '{' optnl antispoof_iflst '}' { $$ = $4; } 1675 ; 1676 1677 antispoof_iflst : antispoof_if optnl { $$ = $1; } 1678 | antispoof_iflst comma antispoof_if optnl { 1679 $1->tail->next = $3; 1680 $1->tail = $3; 1681 $$ = $1; 1682 } 1683 ; 1684 1685 antispoof_if : if_item { $$ = $1; } 1686 | '(' if_item ')' { 1687 $2->dynamic = 1; 1688 $$ = $2; 1689 } 1690 ; 1691 1692 antispoof_opts : { 1693 bzero(&antispoof_opts, sizeof antispoof_opts); 1694 antispoof_opts.rtableid = -1; 1695 } 1696 antispoof_opts_l 1697 { $$ = antispoof_opts; } 1698 | /* empty */ { 1699 bzero(&antispoof_opts, sizeof antispoof_opts); 1700 antispoof_opts.rtableid = -1; 1701 $$ = antispoof_opts; 1702 } 1703 ; 1704 1705 antispoof_opts_l : antispoof_opts_l antispoof_opt 1706 | antispoof_opt 1707 ; 1708 1709 antispoof_opt : label { 1710 if (antispoof_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 1711 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 1712 YYERROR; 1713 } 1714 antispoof_opts.label[antispoof_opts.labelcount++] = $1; 1715 } 1716 | RIDENTIFIER number { 1717 antispoof_opts.ridentifier = $2; 1718 } 1719 | RTABLE NUMBER { 1720 if ($2 < 0 || $2 > rt_tableid_max()) { 1721 yyerror("invalid rtable id"); 1722 YYERROR; 1723 } 1724 antispoof_opts.rtableid = $2; 1725 } 1726 ; 1727 1728 not : '!' { $$ = 1; } 1729 | /* empty */ { $$ = 0; } 1730 ; 1731 1732 tabledef : TABLE '<' STRING '>' table_opts { 1733 struct node_host *h, *nh; 1734 struct node_tinit *ti, *nti; 1735 1736 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 1737 yyerror("table name too long, max %d chars", 1738 PF_TABLE_NAME_SIZE - 1); 1739 free($3); 1740 YYERROR; 1741 } 1742 if (pf->loadopt & PFCTL_FLAG_TABLE) 1743 if (process_tabledef($3, &$5)) { 1744 free($3); 1745 YYERROR; 1746 } 1747 free($3); 1748 for (ti = SIMPLEQ_FIRST(&$5.init_nodes); 1749 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) { 1750 if (ti->file) 1751 free(ti->file); 1752 for (h = ti->host; h != NULL; h = nh) { 1753 nh = h->next; 1754 free(h); 1755 } 1756 nti = SIMPLEQ_NEXT(ti, entries); 1757 free(ti); 1758 } 1759 } 1760 ; 1761 1762 table_opts : { 1763 bzero(&table_opts, sizeof table_opts); 1764 SIMPLEQ_INIT(&table_opts.init_nodes); 1765 } 1766 table_opts_l 1767 { $$ = table_opts; } 1768 | /* empty */ 1769 { 1770 bzero(&table_opts, sizeof table_opts); 1771 SIMPLEQ_INIT(&table_opts.init_nodes); 1772 $$ = table_opts; 1773 } 1774 ; 1775 1776 table_opts_l : table_opts_l table_opt 1777 | table_opt 1778 ; 1779 1780 table_opt : STRING { 1781 if (!strcmp($1, "const")) 1782 table_opts.flags |= PFR_TFLAG_CONST; 1783 else if (!strcmp($1, "persist")) 1784 table_opts.flags |= PFR_TFLAG_PERSIST; 1785 else if (!strcmp($1, "counters")) 1786 table_opts.flags |= PFR_TFLAG_COUNTERS; 1787 else { 1788 yyerror("invalid table option '%s'", $1); 1789 free($1); 1790 YYERROR; 1791 } 1792 free($1); 1793 } 1794 | '{' optnl '}' { table_opts.init_addr = 1; } 1795 | '{' optnl host_list '}' { 1796 struct node_host *n; 1797 struct node_tinit *ti; 1798 1799 for (n = $3; n != NULL; n = n->next) { 1800 switch (n->addr.type) { 1801 case PF_ADDR_ADDRMASK: 1802 continue; /* ok */ 1803 case PF_ADDR_RANGE: 1804 yyerror("address ranges are not " 1805 "permitted inside tables"); 1806 break; 1807 case PF_ADDR_DYNIFTL: 1808 yyerror("dynamic addresses are not " 1809 "permitted inside tables"); 1810 break; 1811 case PF_ADDR_TABLE: 1812 yyerror("tables cannot contain tables"); 1813 break; 1814 case PF_ADDR_NOROUTE: 1815 yyerror("\"no-route\" is not permitted " 1816 "inside tables"); 1817 break; 1818 case PF_ADDR_URPFFAILED: 1819 yyerror("\"urpf-failed\" is not " 1820 "permitted inside tables"); 1821 break; 1822 default: 1823 yyerror("unknown address type %d", 1824 n->addr.type); 1825 } 1826 YYERROR; 1827 } 1828 if (!(ti = calloc(1, sizeof(*ti)))) 1829 err(1, "table_opt: calloc"); 1830 ti->host = $3; 1831 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1832 entries); 1833 table_opts.init_addr = 1; 1834 } 1835 | FILENAME STRING { 1836 struct node_tinit *ti; 1837 1838 if (!(ti = calloc(1, sizeof(*ti)))) 1839 err(1, "table_opt: calloc"); 1840 ti->file = $2; 1841 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1842 entries); 1843 table_opts.init_addr = 1; 1844 } 1845 ; 1846 1847 altqif : ALTQ interface queue_opts QUEUE qassign { 1848 struct pf_altq a; 1849 1850 if (check_rulestate(PFCTL_STATE_QUEUE)) 1851 YYERROR; 1852 1853 memset(&a, 0, sizeof(a)); 1854 if ($3.scheduler.qtype == ALTQT_NONE) { 1855 yyerror("no scheduler specified!"); 1856 YYERROR; 1857 } 1858 a.scheduler = $3.scheduler.qtype; 1859 a.qlimit = $3.qlimit; 1860 a.tbrsize = $3.tbrsize; 1861 if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) { 1862 yyerror("no child queues specified"); 1863 YYERROR; 1864 } 1865 if (expand_altq(&a, $2, $5, $3.queue_bwspec, 1866 &$3.scheduler)) 1867 YYERROR; 1868 } 1869 ; 1870 1871 queuespec : QUEUE STRING interface queue_opts qassign { 1872 struct pf_altq a; 1873 1874 if (check_rulestate(PFCTL_STATE_QUEUE)) { 1875 free($2); 1876 YYERROR; 1877 } 1878 1879 memset(&a, 0, sizeof(a)); 1880 1881 if (strlcpy(a.qname, $2, sizeof(a.qname)) >= 1882 sizeof(a.qname)) { 1883 yyerror("queue name too long (max " 1884 "%d chars)", PF_QNAME_SIZE-1); 1885 free($2); 1886 YYERROR; 1887 } 1888 free($2); 1889 if ($4.tbrsize) { 1890 yyerror("cannot specify tbrsize for queue"); 1891 YYERROR; 1892 } 1893 if ($4.priority > 255) { 1894 yyerror("priority out of range: max 255"); 1895 YYERROR; 1896 } 1897 a.priority = $4.priority; 1898 a.qlimit = $4.qlimit; 1899 a.scheduler = $4.scheduler.qtype; 1900 if (expand_queue(&a, $3, $5, $4.queue_bwspec, 1901 &$4.scheduler)) { 1902 yyerror("errors in queue definition"); 1903 YYERROR; 1904 } 1905 } 1906 ; 1907 1908 queue_opts : { 1909 bzero(&queue_opts, sizeof queue_opts); 1910 queue_opts.priority = DEFAULT_PRIORITY; 1911 queue_opts.qlimit = DEFAULT_QLIMIT; 1912 queue_opts.scheduler.qtype = ALTQT_NONE; 1913 queue_opts.queue_bwspec.bw_percent = 100; 1914 } 1915 queue_opts_l 1916 { $$ = queue_opts; } 1917 | /* empty */ { 1918 bzero(&queue_opts, sizeof queue_opts); 1919 queue_opts.priority = DEFAULT_PRIORITY; 1920 queue_opts.qlimit = DEFAULT_QLIMIT; 1921 queue_opts.scheduler.qtype = ALTQT_NONE; 1922 queue_opts.queue_bwspec.bw_percent = 100; 1923 $$ = queue_opts; 1924 } 1925 ; 1926 1927 queue_opts_l : queue_opts_l queue_opt 1928 | queue_opt 1929 ; 1930 1931 queue_opt : BANDWIDTH bandwidth { 1932 if (queue_opts.marker & QOM_BWSPEC) { 1933 yyerror("bandwidth cannot be respecified"); 1934 YYERROR; 1935 } 1936 queue_opts.marker |= QOM_BWSPEC; 1937 queue_opts.queue_bwspec = $2; 1938 } 1939 | PRIORITY NUMBER { 1940 if (queue_opts.marker & QOM_PRIORITY) { 1941 yyerror("priority cannot be respecified"); 1942 YYERROR; 1943 } 1944 if ($2 < 0 || $2 > 255) { 1945 yyerror("priority out of range: max 255"); 1946 YYERROR; 1947 } 1948 queue_opts.marker |= QOM_PRIORITY; 1949 queue_opts.priority = $2; 1950 } 1951 | QLIMIT NUMBER { 1952 if (queue_opts.marker & QOM_QLIMIT) { 1953 yyerror("qlimit cannot be respecified"); 1954 YYERROR; 1955 } 1956 if ($2 < 0 || $2 > 65535) { 1957 yyerror("qlimit out of range: max 65535"); 1958 YYERROR; 1959 } 1960 queue_opts.marker |= QOM_QLIMIT; 1961 queue_opts.qlimit = $2; 1962 } 1963 | scheduler { 1964 if (queue_opts.marker & QOM_SCHEDULER) { 1965 yyerror("scheduler cannot be respecified"); 1966 YYERROR; 1967 } 1968 queue_opts.marker |= QOM_SCHEDULER; 1969 queue_opts.scheduler = $1; 1970 } 1971 | TBRSIZE NUMBER { 1972 if (queue_opts.marker & QOM_TBRSIZE) { 1973 yyerror("tbrsize cannot be respecified"); 1974 YYERROR; 1975 } 1976 if ($2 < 0 || $2 > UINT_MAX) { 1977 yyerror("tbrsize too big: max %u", UINT_MAX); 1978 YYERROR; 1979 } 1980 queue_opts.marker |= QOM_TBRSIZE; 1981 queue_opts.tbrsize = $2; 1982 } 1983 ; 1984 1985 bandwidth : STRING { 1986 double bps; 1987 char *cp; 1988 1989 $$.bw_percent = 0; 1990 1991 bps = strtod($1, &cp); 1992 if (cp != NULL) { 1993 if (strlen(cp) > 1) { 1994 char *cu = cp + 1; 1995 if (!strcmp(cu, "Bit") || 1996 !strcmp(cu, "B") || 1997 !strcmp(cu, "bit") || 1998 !strcmp(cu, "b")) { 1999 *cu = 0; 2000 } 2001 } 2002 if (!strcmp(cp, "b")) 2003 ; /* nothing */ 2004 else if (!strcmp(cp, "K")) 2005 bps *= 1000; 2006 else if (!strcmp(cp, "M")) 2007 bps *= 1000 * 1000; 2008 else if (!strcmp(cp, "G")) 2009 bps *= 1000 * 1000 * 1000; 2010 else if (!strcmp(cp, "%")) { 2011 if (bps < 0 || bps > 100) { 2012 yyerror("bandwidth spec " 2013 "out of range"); 2014 free($1); 2015 YYERROR; 2016 } 2017 $$.bw_percent = bps; 2018 bps = 0; 2019 } else { 2020 yyerror("unknown unit %s", cp); 2021 free($1); 2022 YYERROR; 2023 } 2024 } 2025 free($1); 2026 $$.bw_absolute = (u_int64_t)bps; 2027 } 2028 | NUMBER { 2029 if ($1 < 0 || $1 >= LLONG_MAX) { 2030 yyerror("bandwidth number too big"); 2031 YYERROR; 2032 } 2033 $$.bw_percent = 0; 2034 $$.bw_absolute = $1; 2035 } 2036 ; 2037 2038 scheduler : CBQ { 2039 $$.qtype = ALTQT_CBQ; 2040 $$.data.cbq_opts.flags = 0; 2041 } 2042 | CBQ '(' cbqflags_list ')' { 2043 $$.qtype = ALTQT_CBQ; 2044 $$.data.cbq_opts.flags = $3; 2045 } 2046 | PRIQ { 2047 $$.qtype = ALTQT_PRIQ; 2048 $$.data.priq_opts.flags = 0; 2049 } 2050 | PRIQ '(' priqflags_list ')' { 2051 $$.qtype = ALTQT_PRIQ; 2052 $$.data.priq_opts.flags = $3; 2053 } 2054 | HFSC { 2055 $$.qtype = ALTQT_HFSC; 2056 bzero(&$$.data.hfsc_opts, 2057 sizeof(struct node_hfsc_opts)); 2058 } 2059 | HFSC '(' hfsc_opts ')' { 2060 $$.qtype = ALTQT_HFSC; 2061 $$.data.hfsc_opts = $3; 2062 } 2063 | FAIRQ { 2064 $$.qtype = ALTQT_FAIRQ; 2065 bzero(&$$.data.fairq_opts, 2066 sizeof(struct node_fairq_opts)); 2067 } 2068 | FAIRQ '(' fairq_opts ')' { 2069 $$.qtype = ALTQT_FAIRQ; 2070 $$.data.fairq_opts = $3; 2071 } 2072 | CODEL { 2073 $$.qtype = ALTQT_CODEL; 2074 bzero(&$$.data.codel_opts, 2075 sizeof(struct codel_opts)); 2076 } 2077 | CODEL '(' codel_opts ')' { 2078 $$.qtype = ALTQT_CODEL; 2079 $$.data.codel_opts = $3; 2080 } 2081 ; 2082 2083 cbqflags_list : cbqflags_item { $$ |= $1; } 2084 | cbqflags_list comma cbqflags_item { $$ |= $3; } 2085 ; 2086 2087 cbqflags_item : STRING { 2088 if (!strcmp($1, "default")) 2089 $$ = CBQCLF_DEFCLASS; 2090 else if (!strcmp($1, "borrow")) 2091 $$ = CBQCLF_BORROW; 2092 else if (!strcmp($1, "red")) 2093 $$ = CBQCLF_RED; 2094 else if (!strcmp($1, "ecn")) 2095 $$ = CBQCLF_RED|CBQCLF_ECN; 2096 else if (!strcmp($1, "rio")) 2097 $$ = CBQCLF_RIO; 2098 else if (!strcmp($1, "codel")) 2099 $$ = CBQCLF_CODEL; 2100 else { 2101 yyerror("unknown cbq flag \"%s\"", $1); 2102 free($1); 2103 YYERROR; 2104 } 2105 free($1); 2106 } 2107 ; 2108 2109 priqflags_list : priqflags_item { $$ |= $1; } 2110 | priqflags_list comma priqflags_item { $$ |= $3; } 2111 ; 2112 2113 priqflags_item : STRING { 2114 if (!strcmp($1, "default")) 2115 $$ = PRCF_DEFAULTCLASS; 2116 else if (!strcmp($1, "red")) 2117 $$ = PRCF_RED; 2118 else if (!strcmp($1, "ecn")) 2119 $$ = PRCF_RED|PRCF_ECN; 2120 else if (!strcmp($1, "rio")) 2121 $$ = PRCF_RIO; 2122 else if (!strcmp($1, "codel")) 2123 $$ = PRCF_CODEL; 2124 else { 2125 yyerror("unknown priq flag \"%s\"", $1); 2126 free($1); 2127 YYERROR; 2128 } 2129 free($1); 2130 } 2131 ; 2132 2133 hfsc_opts : { 2134 bzero(&hfsc_opts, 2135 sizeof(struct node_hfsc_opts)); 2136 } 2137 hfscopts_list { 2138 $$ = hfsc_opts; 2139 } 2140 ; 2141 2142 hfscopts_list : hfscopts_item 2143 | hfscopts_list comma hfscopts_item 2144 ; 2145 2146 hfscopts_item : LINKSHARE bandwidth { 2147 if (hfsc_opts.linkshare.used) { 2148 yyerror("linkshare already specified"); 2149 YYERROR; 2150 } 2151 hfsc_opts.linkshare.m2 = $2; 2152 hfsc_opts.linkshare.used = 1; 2153 } 2154 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')' 2155 { 2156 if ($5 < 0 || $5 > INT_MAX) { 2157 yyerror("timing in curve out of range"); 2158 YYERROR; 2159 } 2160 if (hfsc_opts.linkshare.used) { 2161 yyerror("linkshare already specified"); 2162 YYERROR; 2163 } 2164 hfsc_opts.linkshare.m1 = $3; 2165 hfsc_opts.linkshare.d = $5; 2166 hfsc_opts.linkshare.m2 = $7; 2167 hfsc_opts.linkshare.used = 1; 2168 } 2169 | REALTIME bandwidth { 2170 if (hfsc_opts.realtime.used) { 2171 yyerror("realtime already specified"); 2172 YYERROR; 2173 } 2174 hfsc_opts.realtime.m2 = $2; 2175 hfsc_opts.realtime.used = 1; 2176 } 2177 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')' 2178 { 2179 if ($5 < 0 || $5 > INT_MAX) { 2180 yyerror("timing in curve out of range"); 2181 YYERROR; 2182 } 2183 if (hfsc_opts.realtime.used) { 2184 yyerror("realtime already specified"); 2185 YYERROR; 2186 } 2187 hfsc_opts.realtime.m1 = $3; 2188 hfsc_opts.realtime.d = $5; 2189 hfsc_opts.realtime.m2 = $7; 2190 hfsc_opts.realtime.used = 1; 2191 } 2192 | UPPERLIMIT bandwidth { 2193 if (hfsc_opts.upperlimit.used) { 2194 yyerror("upperlimit already specified"); 2195 YYERROR; 2196 } 2197 hfsc_opts.upperlimit.m2 = $2; 2198 hfsc_opts.upperlimit.used = 1; 2199 } 2200 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')' 2201 { 2202 if ($5 < 0 || $5 > INT_MAX) { 2203 yyerror("timing in curve out of range"); 2204 YYERROR; 2205 } 2206 if (hfsc_opts.upperlimit.used) { 2207 yyerror("upperlimit already specified"); 2208 YYERROR; 2209 } 2210 hfsc_opts.upperlimit.m1 = $3; 2211 hfsc_opts.upperlimit.d = $5; 2212 hfsc_opts.upperlimit.m2 = $7; 2213 hfsc_opts.upperlimit.used = 1; 2214 } 2215 | STRING { 2216 if (!strcmp($1, "default")) 2217 hfsc_opts.flags |= HFCF_DEFAULTCLASS; 2218 else if (!strcmp($1, "red")) 2219 hfsc_opts.flags |= HFCF_RED; 2220 else if (!strcmp($1, "ecn")) 2221 hfsc_opts.flags |= HFCF_RED|HFCF_ECN; 2222 else if (!strcmp($1, "rio")) 2223 hfsc_opts.flags |= HFCF_RIO; 2224 else if (!strcmp($1, "codel")) 2225 hfsc_opts.flags |= HFCF_CODEL; 2226 else { 2227 yyerror("unknown hfsc flag \"%s\"", $1); 2228 free($1); 2229 YYERROR; 2230 } 2231 free($1); 2232 } 2233 ; 2234 2235 fairq_opts : { 2236 bzero(&fairq_opts, 2237 sizeof(struct node_fairq_opts)); 2238 } 2239 fairqopts_list { 2240 $$ = fairq_opts; 2241 } 2242 ; 2243 2244 fairqopts_list : fairqopts_item 2245 | fairqopts_list comma fairqopts_item 2246 ; 2247 2248 fairqopts_item : LINKSHARE bandwidth { 2249 if (fairq_opts.linkshare.used) { 2250 yyerror("linkshare already specified"); 2251 YYERROR; 2252 } 2253 fairq_opts.linkshare.m2 = $2; 2254 fairq_opts.linkshare.used = 1; 2255 } 2256 | LINKSHARE '(' bandwidth number bandwidth ')' { 2257 if (fairq_opts.linkshare.used) { 2258 yyerror("linkshare already specified"); 2259 YYERROR; 2260 } 2261 fairq_opts.linkshare.m1 = $3; 2262 fairq_opts.linkshare.d = $4; 2263 fairq_opts.linkshare.m2 = $5; 2264 fairq_opts.linkshare.used = 1; 2265 } 2266 | HOGS bandwidth { 2267 fairq_opts.hogs_bw = $2; 2268 } 2269 | BUCKETS number { 2270 fairq_opts.nbuckets = $2; 2271 } 2272 | STRING { 2273 if (!strcmp($1, "default")) 2274 fairq_opts.flags |= FARF_DEFAULTCLASS; 2275 else if (!strcmp($1, "red")) 2276 fairq_opts.flags |= FARF_RED; 2277 else if (!strcmp($1, "ecn")) 2278 fairq_opts.flags |= FARF_RED|FARF_ECN; 2279 else if (!strcmp($1, "rio")) 2280 fairq_opts.flags |= FARF_RIO; 2281 else if (!strcmp($1, "codel")) 2282 fairq_opts.flags |= FARF_CODEL; 2283 else { 2284 yyerror("unknown fairq flag \"%s\"", $1); 2285 free($1); 2286 YYERROR; 2287 } 2288 free($1); 2289 } 2290 ; 2291 2292 codel_opts : { 2293 bzero(&codel_opts, 2294 sizeof(struct codel_opts)); 2295 } 2296 codelopts_list { 2297 $$ = codel_opts; 2298 } 2299 ; 2300 2301 codelopts_list : codelopts_item 2302 | codelopts_list comma codelopts_item 2303 ; 2304 2305 codelopts_item : INTERVAL number { 2306 if (codel_opts.interval) { 2307 yyerror("interval already specified"); 2308 YYERROR; 2309 } 2310 codel_opts.interval = $2; 2311 } 2312 | TARGET number { 2313 if (codel_opts.target) { 2314 yyerror("target already specified"); 2315 YYERROR; 2316 } 2317 codel_opts.target = $2; 2318 } 2319 | STRING { 2320 if (!strcmp($1, "ecn")) 2321 codel_opts.ecn = 1; 2322 else { 2323 yyerror("unknown codel option \"%s\"", $1); 2324 free($1); 2325 YYERROR; 2326 } 2327 free($1); 2328 } 2329 ; 2330 2331 qassign : /* empty */ { $$ = NULL; } 2332 | qassign_item { $$ = $1; } 2333 | '{' optnl qassign_list '}' { $$ = $3; } 2334 ; 2335 2336 qassign_list : qassign_item optnl { $$ = $1; } 2337 | qassign_list comma qassign_item optnl { 2338 $1->tail->next = $3; 2339 $1->tail = $3; 2340 $$ = $1; 2341 } 2342 ; 2343 2344 qassign_item : STRING { 2345 $$ = calloc(1, sizeof(struct node_queue)); 2346 if ($$ == NULL) 2347 err(1, "qassign_item: calloc"); 2348 if (strlcpy($$->queue, $1, sizeof($$->queue)) >= 2349 sizeof($$->queue)) { 2350 yyerror("queue name '%s' too long (max " 2351 "%d chars)", $1, sizeof($$->queue)-1); 2352 free($1); 2353 free($$); 2354 YYERROR; 2355 } 2356 free($1); 2357 $$->next = NULL; 2358 $$->tail = $$; 2359 } 2360 ; 2361 2362 pfrule : action dir logquick interface route af proto fromto 2363 filter_opts 2364 { 2365 struct pfctl_rule r; 2366 struct node_state_opt *o; 2367 struct node_proto *proto; 2368 int srctrack = 0; 2369 int statelock = 0; 2370 int adaptive = 0; 2371 int defaults = 0; 2372 2373 if (check_rulestate(PFCTL_STATE_FILTER)) 2374 YYERROR; 2375 2376 memset(&r, 0, sizeof(r)); 2377 2378 r.action = $1.b1; 2379 switch ($1.b2) { 2380 case PFRULE_RETURNRST: 2381 r.rule_flag |= PFRULE_RETURNRST; 2382 r.return_ttl = $1.w; 2383 break; 2384 case PFRULE_RETURNICMP: 2385 r.rule_flag |= PFRULE_RETURNICMP; 2386 r.return_icmp = $1.w; 2387 r.return_icmp6 = $1.w2; 2388 break; 2389 case PFRULE_RETURN: 2390 r.rule_flag |= PFRULE_RETURN; 2391 r.return_icmp = $1.w; 2392 r.return_icmp6 = $1.w2; 2393 break; 2394 } 2395 r.direction = $2; 2396 r.log = $3.log; 2397 r.logif = $3.logif; 2398 r.quick = $3.quick; 2399 r.prob = $9.prob; 2400 r.rtableid = $9.rtableid; 2401 2402 if ($9.nodf) 2403 r.scrub_flags |= PFSTATE_NODF; 2404 if ($9.randomid) 2405 r.scrub_flags |= PFSTATE_RANDOMID; 2406 if ($9.minttl) 2407 r.min_ttl = $9.minttl; 2408 if ($9.max_mss) 2409 r.max_mss = $9.max_mss; 2410 if ($9.marker & FOM_SETTOS) { 2411 r.scrub_flags |= PFSTATE_SETTOS; 2412 r.set_tos = $9.settos; 2413 } 2414 if ($9.marker & FOM_SCRUB_TCP) 2415 r.scrub_flags |= PFSTATE_SCRUB_TCP; 2416 2417 if ($9.marker & FOM_PRIO) { 2418 if ($9.prio == 0) 2419 r.prio = PF_PRIO_ZERO; 2420 else 2421 r.prio = $9.prio; 2422 } 2423 if ($9.marker & FOM_SETPRIO) { 2424 r.set_prio[0] = $9.set_prio[0]; 2425 r.set_prio[1] = $9.set_prio[1]; 2426 r.scrub_flags |= PFSTATE_SETPRIO; 2427 } 2428 2429 if ($9.marker & FOM_AFTO) { 2430 if (!$6) { 2431 yyerror("must indicate source address " 2432 "family with af-to"); 2433 YYERROR; 2434 } 2435 if ($6 == $9.nat.af) { 2436 yyerror("incorrect address family " 2437 "translation"); 2438 YYERROR; 2439 } 2440 } 2441 2442 r.af = $6; 2443 if ($9.tag) 2444 if (strlcpy(r.tagname, $9.tag, 2445 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 2446 yyerror("tag too long, max %u chars", 2447 PF_TAG_NAME_SIZE - 1); 2448 YYERROR; 2449 } 2450 if ($9.match_tag) 2451 if (strlcpy(r.match_tagname, $9.match_tag, 2452 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 2453 yyerror("tag too long, max %u chars", 2454 PF_TAG_NAME_SIZE - 1); 2455 YYERROR; 2456 } 2457 r.match_tag_not = $9.match_tag_not; 2458 if (rule_label(&r, $9.label)) 2459 YYERROR; 2460 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 2461 free($9.label[i]); 2462 r.ridentifier = $9.ridentifier; 2463 r.flags = $9.flags.b1; 2464 r.flagset = $9.flags.b2; 2465 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 2466 yyerror("flags always false"); 2467 YYERROR; 2468 } 2469 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 2470 for (proto = $7; proto != NULL && 2471 proto->proto != IPPROTO_TCP; 2472 proto = proto->next) 2473 ; /* nothing */ 2474 if (proto == NULL && $7 != NULL) { 2475 if ($9.flags.b1 || $9.flags.b2) 2476 yyerror( 2477 "flags only apply to tcp"); 2478 if ($8.src_os) 2479 yyerror( 2480 "OS fingerprinting only " 2481 "apply to tcp"); 2482 YYERROR; 2483 } 2484 #if 0 2485 if (($9.flags.b1 & parse_flags("S")) == 0 && 2486 $8.src_os) { 2487 yyerror("OS fingerprinting requires " 2488 "the SYN TCP flag (flags S/SA)"); 2489 YYERROR; 2490 } 2491 #endif 2492 } 2493 2494 r.tos = $9.tos; 2495 r.keep_state = $9.keep.action; 2496 o = $9.keep.options; 2497 2498 /* 'keep state' by default on pass rules. */ 2499 if (!r.keep_state && !r.action && 2500 !($9.marker & FOM_KEEP)) { 2501 r.keep_state = PF_STATE_NORMAL; 2502 o = keep_state_defaults; 2503 defaults = 1; 2504 } 2505 2506 while (o) { 2507 struct node_state_opt *p = o; 2508 2509 switch (o->type) { 2510 case PF_STATE_OPT_MAX: 2511 if (r.max_states) { 2512 yyerror("state option 'max' " 2513 "multiple definitions"); 2514 YYERROR; 2515 } 2516 r.max_states = o->data.max_states; 2517 break; 2518 case PF_STATE_OPT_NOSYNC: 2519 if (r.rule_flag & PFRULE_NOSYNC) { 2520 yyerror("state option 'sync' " 2521 "multiple definitions"); 2522 YYERROR; 2523 } 2524 r.rule_flag |= PFRULE_NOSYNC; 2525 break; 2526 case PF_STATE_OPT_SRCTRACK: 2527 if (srctrack) { 2528 yyerror("state option " 2529 "'source-track' " 2530 "multiple definitions"); 2531 YYERROR; 2532 } 2533 srctrack = o->data.src_track; 2534 r.rule_flag |= PFRULE_SRCTRACK; 2535 break; 2536 case PF_STATE_OPT_MAX_SRC_STATES: 2537 if (r.max_src_states) { 2538 yyerror("state option " 2539 "'max-src-states' " 2540 "multiple definitions"); 2541 YYERROR; 2542 } 2543 if (o->data.max_src_states == 0) { 2544 yyerror("'max-src-states' must " 2545 "be > 0"); 2546 YYERROR; 2547 } 2548 r.max_src_states = 2549 o->data.max_src_states; 2550 r.rule_flag |= PFRULE_SRCTRACK; 2551 break; 2552 case PF_STATE_OPT_OVERLOAD: 2553 if (r.overload_tblname[0]) { 2554 yyerror("multiple 'overload' " 2555 "table definitions"); 2556 YYERROR; 2557 } 2558 if (strlcpy(r.overload_tblname, 2559 o->data.overload.tblname, 2560 PF_TABLE_NAME_SIZE) >= 2561 PF_TABLE_NAME_SIZE) { 2562 yyerror("state option: " 2563 "strlcpy"); 2564 YYERROR; 2565 } 2566 r.flush = o->data.overload.flush; 2567 break; 2568 case PF_STATE_OPT_MAX_SRC_CONN: 2569 if (r.max_src_conn) { 2570 yyerror("state option " 2571 "'max-src-conn' " 2572 "multiple definitions"); 2573 YYERROR; 2574 } 2575 if (o->data.max_src_conn == 0) { 2576 yyerror("'max-src-conn' " 2577 "must be > 0"); 2578 YYERROR; 2579 } 2580 r.max_src_conn = 2581 o->data.max_src_conn; 2582 r.rule_flag |= PFRULE_SRCTRACK | 2583 PFRULE_RULESRCTRACK; 2584 break; 2585 case PF_STATE_OPT_MAX_SRC_CONN_RATE: 2586 if (r.max_src_conn_rate.limit) { 2587 yyerror("state option " 2588 "'max-src-conn-rate' " 2589 "multiple definitions"); 2590 YYERROR; 2591 } 2592 if (!o->data.max_src_conn_rate.limit || 2593 !o->data.max_src_conn_rate.seconds) { 2594 yyerror("'max-src-conn-rate' " 2595 "values must be > 0"); 2596 YYERROR; 2597 } 2598 if (o->data.max_src_conn_rate.limit > 2599 PF_THRESHOLD_MAX) { 2600 yyerror("'max-src-conn-rate' " 2601 "maximum rate must be < %u", 2602 PF_THRESHOLD_MAX); 2603 YYERROR; 2604 } 2605 r.max_src_conn_rate.limit = 2606 o->data.max_src_conn_rate.limit; 2607 r.max_src_conn_rate.seconds = 2608 o->data.max_src_conn_rate.seconds; 2609 r.rule_flag |= PFRULE_SRCTRACK | 2610 PFRULE_RULESRCTRACK; 2611 break; 2612 case PF_STATE_OPT_MAX_SRC_NODES: 2613 if (r.max_src_nodes) { 2614 yyerror("state option " 2615 "'max-src-nodes' " 2616 "multiple definitions"); 2617 YYERROR; 2618 } 2619 if (o->data.max_src_nodes == 0) { 2620 yyerror("'max-src-nodes' must " 2621 "be > 0"); 2622 YYERROR; 2623 } 2624 r.max_src_nodes = 2625 o->data.max_src_nodes; 2626 r.rule_flag |= PFRULE_SRCTRACK | 2627 PFRULE_RULESRCTRACK; 2628 break; 2629 case PF_STATE_OPT_STATELOCK: 2630 if (statelock) { 2631 yyerror("state locking option: " 2632 "multiple definitions"); 2633 YYERROR; 2634 } 2635 statelock = 1; 2636 r.rule_flag |= o->data.statelock; 2637 break; 2638 case PF_STATE_OPT_SLOPPY: 2639 if (r.rule_flag & PFRULE_STATESLOPPY) { 2640 yyerror("state sloppy option: " 2641 "multiple definitions"); 2642 YYERROR; 2643 } 2644 r.rule_flag |= PFRULE_STATESLOPPY; 2645 break; 2646 case PF_STATE_OPT_PFLOW: 2647 if (r.rule_flag & PFRULE_PFLOW) { 2648 yyerror("state pflow option: " 2649 "multiple definitions"); 2650 YYERROR; 2651 } 2652 r.rule_flag |= PFRULE_PFLOW; 2653 break; 2654 case PF_STATE_OPT_TIMEOUT: 2655 if (o->data.timeout.number == 2656 PFTM_ADAPTIVE_START || 2657 o->data.timeout.number == 2658 PFTM_ADAPTIVE_END) 2659 adaptive = 1; 2660 if (r.timeout[o->data.timeout.number]) { 2661 yyerror("state timeout %s " 2662 "multiple definitions", 2663 pf_timeouts[o->data. 2664 timeout.number].name); 2665 YYERROR; 2666 } 2667 r.timeout[o->data.timeout.number] = 2668 o->data.timeout.seconds; 2669 } 2670 o = o->next; 2671 if (!defaults) 2672 free(p); 2673 } 2674 2675 /* 'flags S/SA' by default on stateful rules */ 2676 if (!r.action && !r.flags && !r.flagset && 2677 !$9.fragment && !($9.marker & FOM_FLAGS) && 2678 r.keep_state) { 2679 r.flags = parse_flags("S"); 2680 r.flagset = parse_flags("SA"); 2681 } 2682 if (!adaptive && r.max_states) { 2683 r.timeout[PFTM_ADAPTIVE_START] = 2684 (r.max_states / 10) * 6; 2685 r.timeout[PFTM_ADAPTIVE_END] = 2686 (r.max_states / 10) * 12; 2687 } 2688 if (r.rule_flag & PFRULE_SRCTRACK) { 2689 if (srctrack == PF_SRCTRACK_GLOBAL && 2690 r.max_src_nodes) { 2691 yyerror("'max-src-nodes' is " 2692 "incompatible with " 2693 "'source-track global'"); 2694 YYERROR; 2695 } 2696 if (srctrack == PF_SRCTRACK_GLOBAL && 2697 r.max_src_conn) { 2698 yyerror("'max-src-conn' is " 2699 "incompatible with " 2700 "'source-track global'"); 2701 YYERROR; 2702 } 2703 if (srctrack == PF_SRCTRACK_GLOBAL && 2704 r.max_src_conn_rate.seconds) { 2705 yyerror("'max-src-conn-rate' is " 2706 "incompatible with " 2707 "'source-track global'"); 2708 YYERROR; 2709 } 2710 if (r.timeout[PFTM_SRC_NODE] < 2711 r.max_src_conn_rate.seconds) 2712 r.timeout[PFTM_SRC_NODE] = 2713 r.max_src_conn_rate.seconds; 2714 r.rule_flag |= PFRULE_SRCTRACK; 2715 if (srctrack == PF_SRCTRACK_RULE) 2716 r.rule_flag |= PFRULE_RULESRCTRACK; 2717 } 2718 if (r.keep_state && !statelock) 2719 r.rule_flag |= default_statelock; 2720 2721 if ($9.fragment) 2722 r.rule_flag |= PFRULE_FRAGMENT; 2723 r.allow_opts = $9.allowopts; 2724 2725 decide_address_family($8.src.host, &r.af); 2726 decide_address_family($8.dst.host, &r.af); 2727 r.naf = r.af; 2728 2729 if ($5.rt) { 2730 if (!r.direction) { 2731 yyerror("direction must be explicit " 2732 "with rules that specify routing"); 2733 YYERROR; 2734 } 2735 r.rt = $5.rt; 2736 r.rpool.opts = $5.pool_opts; 2737 if ($5.key != NULL) 2738 memcpy(&r.rpool.key, $5.key, 2739 sizeof(struct pf_poolhashkey)); 2740 } 2741 if (r.rt) { 2742 decide_address_family($5.host, &r.af); 2743 remove_invalid_hosts(&$5.host, &r.af); 2744 if ($5.host == NULL) { 2745 yyerror("no routing address with " 2746 "matching address family found."); 2747 YYERROR; 2748 } 2749 if ((r.rpool.opts & PF_POOL_TYPEMASK) == 2750 PF_POOL_NONE && ($5.host->next != NULL || 2751 $5.host->addr.type == PF_ADDR_TABLE || 2752 DYNIF_MULTIADDR($5.host->addr))) 2753 r.rpool.opts |= PF_POOL_ROUNDROBIN; 2754 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2755 PF_POOL_ROUNDROBIN && 2756 disallow_table($5.host, "tables are only " 2757 "supported in round-robin routing pools")) 2758 YYERROR; 2759 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2760 PF_POOL_ROUNDROBIN && 2761 disallow_alias($5.host, "interface (%s) " 2762 "is only supported in round-robin " 2763 "routing pools")) 2764 YYERROR; 2765 if ($5.host->next != NULL) { 2766 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 2767 PF_POOL_ROUNDROBIN) { 2768 yyerror("r.rpool.opts must " 2769 "be PF_POOL_ROUNDROBIN"); 2770 YYERROR; 2771 } 2772 } 2773 } 2774 if ($9.queues.qname != NULL) { 2775 if (strlcpy(r.qname, $9.queues.qname, 2776 sizeof(r.qname)) >= sizeof(r.qname)) { 2777 yyerror("rule qname too long (max " 2778 "%d chars)", sizeof(r.qname)-1); 2779 YYERROR; 2780 } 2781 free($9.queues.qname); 2782 } 2783 if ($9.queues.pqname != NULL) { 2784 if (strlcpy(r.pqname, $9.queues.pqname, 2785 sizeof(r.pqname)) >= sizeof(r.pqname)) { 2786 yyerror("rule pqname too long (max " 2787 "%d chars)", sizeof(r.pqname)-1); 2788 YYERROR; 2789 } 2790 free($9.queues.pqname); 2791 } 2792 #ifdef __FreeBSD__ 2793 r.divert.port = $9.divert.port; 2794 #else 2795 if ((r.divert.port = $9.divert.port)) { 2796 if (r.direction == PF_OUT) { 2797 if ($9.divert.addr) { 2798 yyerror("address specified " 2799 "for outgoing divert"); 2800 YYERROR; 2801 } 2802 bzero(&r.divert.addr, 2803 sizeof(r.divert.addr)); 2804 } else { 2805 if (!$9.divert.addr) { 2806 yyerror("no address specified " 2807 "for incoming divert"); 2808 YYERROR; 2809 } 2810 if ($9.divert.addr->af != r.af) { 2811 yyerror("address family " 2812 "mismatch for divert"); 2813 YYERROR; 2814 } 2815 r.divert.addr = 2816 $9.divert.addr->addr.v.a.addr; 2817 } 2818 } 2819 #endif 2820 2821 if ($9.dnpipe || $9.dnrpipe) { 2822 r.dnpipe = $9.dnpipe; 2823 r.dnrpipe = $9.dnrpipe; 2824 if ($9.free_flags & PFRULE_DN_IS_PIPE) 2825 r.free_flags |= PFRULE_DN_IS_PIPE; 2826 else 2827 r.free_flags |= PFRULE_DN_IS_QUEUE; 2828 } 2829 2830 if ($9.marker & FOM_AFTO) 2831 r.naf = $9.nat.af; 2832 2833 r.nat.opts = $9.nat.pool_opts.type; 2834 r.nat.opts |= $9.nat.pool_opts.opts; 2835 expand_rule(&r, $4, $5.host, $9.nat.rdr ? $9.nat.rdr->host : NULL, 2836 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host, 2837 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec, ""); 2838 } 2839 ; 2840 2841 filter_opts : { 2842 bzero(&filter_opts, sizeof filter_opts); 2843 filter_opts.rtableid = -1; 2844 } 2845 filter_opts_l 2846 { $$ = filter_opts; } 2847 | /* empty */ { 2848 bzero(&filter_opts, sizeof filter_opts); 2849 filter_opts.rtableid = -1; 2850 $$ = filter_opts; 2851 } 2852 ; 2853 2854 filter_opts_l : filter_opts_l filter_opt 2855 | filter_opt 2856 ; 2857 2858 filter_opt : USER uids { 2859 if (filter_opts.uid) 2860 $2->tail->next = filter_opts.uid; 2861 filter_opts.uid = $2; 2862 } 2863 | GROUP gids { 2864 if (filter_opts.gid) 2865 $2->tail->next = filter_opts.gid; 2866 filter_opts.gid = $2; 2867 } 2868 | flags { 2869 if (filter_opts.marker & FOM_FLAGS) { 2870 yyerror("flags cannot be redefined"); 2871 YYERROR; 2872 } 2873 filter_opts.marker |= FOM_FLAGS; 2874 filter_opts.flags.b1 |= $1.b1; 2875 filter_opts.flags.b2 |= $1.b2; 2876 filter_opts.flags.w |= $1.w; 2877 filter_opts.flags.w2 |= $1.w2; 2878 } 2879 | icmpspec { 2880 if (filter_opts.marker & FOM_ICMP) { 2881 yyerror("icmp-type cannot be redefined"); 2882 YYERROR; 2883 } 2884 filter_opts.marker |= FOM_ICMP; 2885 filter_opts.icmpspec = $1; 2886 } 2887 | PRIO NUMBER { 2888 if (filter_opts.marker & FOM_PRIO) { 2889 yyerror("prio cannot be redefined"); 2890 YYERROR; 2891 } 2892 if ($2 < 0 || $2 > PF_PRIO_MAX) { 2893 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 2894 YYERROR; 2895 } 2896 filter_opts.marker |= FOM_PRIO; 2897 filter_opts.prio = $2; 2898 } 2899 | TOS tos { 2900 if (filter_opts.marker & FOM_TOS) { 2901 yyerror("tos cannot be redefined"); 2902 YYERROR; 2903 } 2904 filter_opts.marker |= FOM_TOS; 2905 filter_opts.tos = $2; 2906 } 2907 | keep { 2908 if (filter_opts.marker & FOM_KEEP) { 2909 yyerror("modulate or keep cannot be redefined"); 2910 YYERROR; 2911 } 2912 filter_opts.marker |= FOM_KEEP; 2913 filter_opts.keep.action = $1.action; 2914 filter_opts.keep.options = $1.options; 2915 } 2916 | RIDENTIFIER number { 2917 filter_opts.ridentifier = $2; 2918 } 2919 | FRAGMENT { 2920 filter_opts.fragment = 1; 2921 } 2922 | ALLOWOPTS { 2923 filter_opts.allowopts = 1; 2924 } 2925 | label { 2926 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 2927 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 2928 YYERROR; 2929 } 2930 filter_opts.label[filter_opts.labelcount++] = $1; 2931 } 2932 | qname { 2933 if (filter_opts.queues.qname) { 2934 yyerror("queue cannot be redefined"); 2935 YYERROR; 2936 } 2937 filter_opts.queues = $1; 2938 } 2939 | DNPIPE number { 2940 filter_opts.dnpipe = $2; 2941 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2942 } 2943 | DNPIPE '(' number ')' { 2944 filter_opts.dnpipe = $3; 2945 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2946 } 2947 | DNPIPE '(' number comma number ')' { 2948 filter_opts.dnrpipe = $5; 2949 filter_opts.dnpipe = $3; 2950 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2951 } 2952 | DNQUEUE number { 2953 filter_opts.dnpipe = $2; 2954 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2955 } 2956 | DNQUEUE '(' number comma number ')' { 2957 filter_opts.dnrpipe = $5; 2958 filter_opts.dnpipe = $3; 2959 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2960 } 2961 | DNQUEUE '(' number ')' { 2962 filter_opts.dnpipe = $3; 2963 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2964 } 2965 | TAG string { 2966 filter_opts.tag = $2; 2967 } 2968 | not TAGGED string { 2969 filter_opts.match_tag = $3; 2970 filter_opts.match_tag_not = $1; 2971 } 2972 | RECEIVEDON if_item { 2973 if (filter_opts.rcv) { 2974 yyerror("cannot respecify received-on"); 2975 YYERROR; 2976 } 2977 filter_opts.rcv = $2; 2978 } 2979 | PROBABILITY probability { 2980 double p; 2981 2982 p = floor($2 * UINT_MAX + 0.5); 2983 if (p < 0.0 || p > UINT_MAX) { 2984 yyerror("invalid probability: %lf", p); 2985 YYERROR; 2986 } 2987 filter_opts.prob = (u_int32_t)p; 2988 if (filter_opts.prob == 0) 2989 filter_opts.prob = 1; 2990 } 2991 | RTABLE NUMBER { 2992 if ($2 < 0 || $2 > rt_tableid_max()) { 2993 yyerror("invalid rtable id"); 2994 YYERROR; 2995 } 2996 filter_opts.rtableid = $2; 2997 } 2998 | DIVERTTO portplain { 2999 #ifdef __FreeBSD__ 3000 filter_opts.divert.port = $2.a; 3001 if (!filter_opts.divert.port) { 3002 yyerror("invalid divert port: %u", ntohs($2.a)); 3003 YYERROR; 3004 } 3005 #endif 3006 } 3007 | DIVERTTO STRING PORT portplain { 3008 #ifndef __FreeBSD__ 3009 if ((filter_opts.divert.addr = host($2)) == NULL) { 3010 yyerror("could not parse divert address: %s", 3011 $2); 3012 free($2); 3013 YYERROR; 3014 } 3015 #else 3016 if ($2) 3017 #endif 3018 free($2); 3019 filter_opts.divert.port = $4.a; 3020 if (!filter_opts.divert.port) { 3021 yyerror("invalid divert port: %u", ntohs($4.a)); 3022 YYERROR; 3023 } 3024 } 3025 | DIVERTREPLY { 3026 #ifdef __FreeBSD__ 3027 yyerror("divert-reply has no meaning in FreeBSD pf(4)"); 3028 YYERROR; 3029 #else 3030 filter_opts.divert.port = 1; /* some random value */ 3031 #endif 3032 } 3033 | SCRUB '(' scrub_opts ')' { 3034 filter_opts.nodf = $3.nodf; 3035 filter_opts.minttl = $3.minttl; 3036 if ($3.marker & FOM_SETTOS) { 3037 /* Old style rules are "scrub set-tos 0x42" 3038 * New style are "set tos 0x42 scrub (...)" 3039 * What is in "scrub(...)"" is unfortunately the 3040 * original scrub syntax so it would overwrite 3041 * "set tos" of a pass/match rule. 3042 */ 3043 filter_opts.settos = $3.settos; 3044 } 3045 filter_opts.randomid = $3.randomid; 3046 filter_opts.max_mss = $3.maxmss; 3047 if ($3.reassemble_tcp) 3048 filter_opts.marker |= FOM_SCRUB_TCP; 3049 filter_opts.marker |= $3.marker; 3050 } 3051 | AFTO af FROM redirspec pool_opts { 3052 if (filter_opts.nat.rdr) { 3053 yyerror("cannot respecify af-to"); 3054 YYERROR; 3055 } 3056 if ($2 == 0) { 3057 yyerror("no address family specified"); 3058 YYERROR; 3059 } 3060 if ($4->af && $4->af != $2) { 3061 yyerror("af-to addresses must be in the " 3062 "target address family"); 3063 YYERROR; 3064 } 3065 filter_opts.nat.af = $2; 3066 filter_opts.nat.rdr = calloc(1, sizeof(struct redirection)); 3067 if (filter_opts.nat.rdr == NULL) 3068 err(1, "af-to: calloc"); 3069 filter_opts.nat.rdr->host = $4; 3070 memcpy(&filter_opts.nat.pool_opts, &$5, 3071 sizeof(filter_opts.nat.pool_opts)); 3072 filter_opts.rdr.rdr = 3073 calloc(1, sizeof(struct redirection)); 3074 bzero(&filter_opts.rdr.pool_opts, 3075 sizeof(filter_opts.rdr.pool_opts)); 3076 filter_opts.marker |= FOM_AFTO; 3077 } 3078 | AFTO af FROM redirspec pool_opts TO redirspec pool_opts { 3079 if (filter_opts.nat.rdr) { 3080 yyerror("cannot respecify af-to"); 3081 YYERROR; 3082 } 3083 if ($2 == 0) { 3084 yyerror("no address family specified"); 3085 YYERROR; 3086 } 3087 if (($4->af && $4->af != $2) || 3088 ($7->af && $7->af != $2)) { 3089 yyerror("af-to addresses must be in the " 3090 "target address family"); 3091 YYERROR; 3092 } 3093 filter_opts.nat.af = $2; 3094 filter_opts.nat.rdr = calloc(1, sizeof(struct redirection)); 3095 if (filter_opts.nat.rdr == NULL) 3096 err(1, "af-to: calloc"); 3097 filter_opts.nat.rdr->host = $4; 3098 memcpy(&filter_opts.nat.pool_opts, &$5, 3099 sizeof(filter_opts.nat.pool_opts)); 3100 filter_opts.rdr.af = $2; 3101 filter_opts.rdr.rdr = calloc(1, sizeof(struct redirection)); 3102 if (filter_opts.rdr.rdr == NULL) 3103 err(1, "af-to: calloc"); 3104 filter_opts.rdr.rdr->host = $7; 3105 memcpy(&filter_opts.nat.pool_opts, &$8, 3106 sizeof(filter_opts.nat.pool_opts)); 3107 filter_opts.marker |= FOM_AFTO; 3108 } 3109 | filter_sets 3110 ; 3111 3112 filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; } 3113 | SET filter_set { $$ = filter_opts; } 3114 ; 3115 3116 filter_sets_l : filter_sets_l comma filter_set 3117 | filter_set 3118 ; 3119 3120 filter_set : prio { 3121 if (filter_opts.marker & FOM_SETPRIO) { 3122 yyerror("prio cannot be redefined"); 3123 YYERROR; 3124 } 3125 filter_opts.marker |= FOM_SETPRIO; 3126 filter_opts.set_prio[0] = $1.b1; 3127 filter_opts.set_prio[1] = $1.b2; 3128 } 3129 | TOS tos { 3130 if (filter_opts.marker & FOM_SETTOS) { 3131 yyerror("tos cannot be respecified"); 3132 YYERROR; 3133 } 3134 filter_opts.marker |= FOM_SETTOS; 3135 filter_opts.settos = $2; 3136 } 3137 prio : PRIO NUMBER { 3138 if ($2 < 0 || $2 > PF_PRIO_MAX) { 3139 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 3140 YYERROR; 3141 } 3142 $$.b1 = $$.b2 = $2; 3143 } 3144 | PRIO '(' NUMBER comma NUMBER ')' { 3145 if ($3 < 0 || $3 > PF_PRIO_MAX || 3146 $5 < 0 || $5 > PF_PRIO_MAX) { 3147 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 3148 YYERROR; 3149 } 3150 $$.b1 = $3; 3151 $$.b2 = $5; 3152 } 3153 ; 3154 3155 probability : STRING { 3156 char *e; 3157 double p = strtod($1, &e); 3158 3159 if (*e == '%') { 3160 p *= 0.01; 3161 e++; 3162 } 3163 if (*e) { 3164 yyerror("invalid probability: %s", $1); 3165 free($1); 3166 YYERROR; 3167 } 3168 free($1); 3169 $$ = p; 3170 } 3171 | NUMBER { 3172 $$ = (double)$1; 3173 } 3174 ; 3175 3176 3177 action : PASS { 3178 $$.b1 = PF_PASS; 3179 $$.b2 = failpolicy; 3180 $$.w = returnicmpdefault; 3181 $$.w2 = returnicmp6default; 3182 } 3183 | MATCH { $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; } 3184 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 3185 ; 3186 3187 blockspec : /* empty */ { 3188 $$.b2 = blockpolicy; 3189 $$.w = returnicmpdefault; 3190 $$.w2 = returnicmp6default; 3191 } 3192 | DROP { 3193 $$.b2 = PFRULE_DROP; 3194 $$.w = 0; 3195 $$.w2 = 0; 3196 } 3197 | RETURNRST { 3198 $$.b2 = PFRULE_RETURNRST; 3199 $$.w = 0; 3200 $$.w2 = 0; 3201 } 3202 | RETURNRST '(' TTL NUMBER ')' { 3203 if ($4 < 0 || $4 > 255) { 3204 yyerror("illegal ttl value %d", $4); 3205 YYERROR; 3206 } 3207 $$.b2 = PFRULE_RETURNRST; 3208 $$.w = $4; 3209 $$.w2 = 0; 3210 } 3211 | RETURNICMP { 3212 $$.b2 = PFRULE_RETURNICMP; 3213 $$.w = returnicmpdefault; 3214 $$.w2 = returnicmp6default; 3215 } 3216 | RETURNICMP6 { 3217 $$.b2 = PFRULE_RETURNICMP; 3218 $$.w = returnicmpdefault; 3219 $$.w2 = returnicmp6default; 3220 } 3221 | RETURNICMP '(' reticmpspec ')' { 3222 $$.b2 = PFRULE_RETURNICMP; 3223 $$.w = $3; 3224 $$.w2 = returnicmpdefault; 3225 } 3226 | RETURNICMP6 '(' reticmp6spec ')' { 3227 $$.b2 = PFRULE_RETURNICMP; 3228 $$.w = returnicmpdefault; 3229 $$.w2 = $3; 3230 } 3231 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' { 3232 $$.b2 = PFRULE_RETURNICMP; 3233 $$.w = $3; 3234 $$.w2 = $5; 3235 } 3236 | RETURN { 3237 $$.b2 = PFRULE_RETURN; 3238 $$.w = returnicmpdefault; 3239 $$.w2 = returnicmp6default; 3240 } 3241 ; 3242 3243 reticmpspec : STRING { 3244 if (!($$ = parseicmpspec($1, AF_INET))) { 3245 free($1); 3246 YYERROR; 3247 } 3248 free($1); 3249 } 3250 | NUMBER { 3251 u_int8_t icmptype; 3252 3253 if ($1 < 0 || $1 > 255) { 3254 yyerror("invalid icmp code %lu", $1); 3255 YYERROR; 3256 } 3257 icmptype = returnicmpdefault >> 8; 3258 $$ = (icmptype << 8 | $1); 3259 } 3260 ; 3261 3262 reticmp6spec : STRING { 3263 if (!($$ = parseicmpspec($1, AF_INET6))) { 3264 free($1); 3265 YYERROR; 3266 } 3267 free($1); 3268 } 3269 | NUMBER { 3270 u_int8_t icmptype; 3271 3272 if ($1 < 0 || $1 > 255) { 3273 yyerror("invalid icmp code %lu", $1); 3274 YYERROR; 3275 } 3276 icmptype = returnicmp6default >> 8; 3277 $$ = (icmptype << 8 | $1); 3278 } 3279 ; 3280 3281 dir : /* empty */ { $$ = PF_INOUT; } 3282 | IN { $$ = PF_IN; } 3283 | OUT { $$ = PF_OUT; } 3284 ; 3285 3286 quick : /* empty */ { $$.quick = 0; } 3287 | QUICK { $$.quick = 1; } 3288 ; 3289 3290 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; } 3291 | log { $$ = $1; $$.quick = 0; } 3292 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; } 3293 | log QUICK { $$ = $1; $$.quick = 1; } 3294 | QUICK log { $$ = $2; $$.quick = 1; } 3295 ; 3296 3297 log : LOG { $$.log = PF_LOG; $$.logif = 0; } 3298 | LOG '(' logopts ')' { 3299 $$.log = PF_LOG | $3.log; 3300 $$.logif = $3.logif; 3301 } 3302 ; 3303 3304 logopts : logopt { $$ = $1; } 3305 | logopts comma logopt { 3306 $$.log = $1.log | $3.log; 3307 $$.logif = $3.logif; 3308 if ($$.logif == 0) 3309 $$.logif = $1.logif; 3310 } 3311 ; 3312 3313 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; } 3314 | MATCHES { $$.log = PF_LOG_MATCHES; $$.logif = 0; } 3315 | USER { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 3316 | GROUP { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 3317 | TO string { 3318 const char *errstr; 3319 u_int i; 3320 3321 $$.log = 0; 3322 if (strncmp($2, "pflog", 5)) { 3323 yyerror("%s: should be a pflog interface", $2); 3324 free($2); 3325 YYERROR; 3326 } 3327 i = strtonum($2 + 5, 0, 255, &errstr); 3328 if (errstr) { 3329 yyerror("%s: %s", $2, errstr); 3330 free($2); 3331 YYERROR; 3332 } 3333 free($2); 3334 $$.logif = i; 3335 } 3336 ; 3337 3338 interface : /* empty */ { $$ = NULL; } 3339 | ON if_item_not { $$ = $2; } 3340 | ON '{' optnl if_list '}' { $$ = $4; } 3341 ; 3342 3343 if_list : if_item_not optnl { $$ = $1; } 3344 | if_list comma if_item_not optnl { 3345 $1->tail->next = $3; 3346 $1->tail = $3; 3347 $$ = $1; 3348 } 3349 ; 3350 3351 if_item_not : not if_item { $$ = $2; $$->not = $1; } 3352 ; 3353 3354 if_item : STRING { 3355 struct node_host *n; 3356 3357 $$ = calloc(1, sizeof(struct node_if)); 3358 if ($$ == NULL) 3359 err(1, "if_item: calloc"); 3360 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 3361 sizeof($$->ifname)) { 3362 free($1); 3363 free($$); 3364 yyerror("interface name too long"); 3365 YYERROR; 3366 } 3367 3368 if ((n = ifa_exists($1)) != NULL) 3369 $$->ifa_flags = n->ifa_flags; 3370 3371 free($1); 3372 $$->not = 0; 3373 $$->next = NULL; 3374 $$->tail = $$; 3375 } 3376 ; 3377 3378 af : /* empty */ { $$ = 0; } 3379 | INET { $$ = AF_INET; } 3380 | INET6 { $$ = AF_INET6; } 3381 ; 3382 3383 etherproto : /* empty */ { $$ = NULL; } 3384 | PROTO etherproto_item { $$ = $2; } 3385 | PROTO '{' optnl etherproto_list '}' { $$ = $4; } 3386 ; 3387 3388 etherproto_list : etherproto_item optnl { $$ = $1; } 3389 | etherproto_list comma etherproto_item optnl { 3390 $1->tail->next = $3; 3391 $1->tail = $3; 3392 $$ = $1; 3393 } 3394 ; 3395 3396 etherproto_item : etherprotoval { 3397 u_int16_t pr; 3398 3399 pr = (u_int16_t)$1; 3400 if (pr == 0) { 3401 yyerror("proto 0 cannot be used"); 3402 YYERROR; 3403 } 3404 $$ = calloc(1, sizeof(struct node_proto)); 3405 if ($$ == NULL) 3406 err(1, "proto_item: calloc"); 3407 $$->proto = pr; 3408 $$->next = NULL; 3409 $$->tail = $$; 3410 } 3411 ; 3412 3413 etherprotoval : NUMBER { 3414 if ($1 < 0 || $1 > 65565) { 3415 yyerror("protocol outside range"); 3416 YYERROR; 3417 } 3418 } 3419 | STRING 3420 { 3421 if (!strncmp($1, "0x", 2)) { 3422 if (sscanf($1, "0x%4x", &$$) != 1) { 3423 free($1); 3424 yyerror("invalid EtherType hex"); 3425 YYERROR; 3426 } 3427 } else { 3428 yyerror("Symbolic EtherType not yet supported"); 3429 } 3430 } 3431 ; 3432 3433 proto : /* empty */ { $$ = NULL; } 3434 | PROTO proto_item { $$ = $2; } 3435 | PROTO '{' optnl proto_list '}' { $$ = $4; } 3436 ; 3437 3438 proto_list : proto_item optnl { $$ = $1; } 3439 | proto_list comma proto_item optnl { 3440 $1->tail->next = $3; 3441 $1->tail = $3; 3442 $$ = $1; 3443 } 3444 ; 3445 3446 proto_item : protoval { 3447 u_int8_t pr; 3448 3449 pr = (u_int8_t)$1; 3450 if (pr == 0) { 3451 yyerror("proto 0 cannot be used"); 3452 YYERROR; 3453 } 3454 $$ = calloc(1, sizeof(struct node_proto)); 3455 if ($$ == NULL) 3456 err(1, "proto_item: calloc"); 3457 $$->proto = pr; 3458 $$->next = NULL; 3459 $$->tail = $$; 3460 } 3461 ; 3462 3463 protoval : STRING { 3464 struct protoent *p; 3465 3466 p = getprotobyname($1); 3467 if (p == NULL) { 3468 yyerror("unknown protocol %s", $1); 3469 free($1); 3470 YYERROR; 3471 } 3472 $$ = p->p_proto; 3473 free($1); 3474 } 3475 | NUMBER { 3476 if ($1 < 0 || $1 > 255) { 3477 yyerror("protocol outside range"); 3478 YYERROR; 3479 } 3480 } 3481 ; 3482 3483 l3fromto : /* empty */ { 3484 bzero(&$$, sizeof($$)); 3485 } 3486 | L3 fromto { 3487 if ($2.src.host != NULL && 3488 $2.src.host->addr.type != PF_ADDR_ADDRMASK && 3489 $2.src.host->addr.type != PF_ADDR_TABLE) { 3490 yyerror("from must be an address or table"); 3491 YYERROR; 3492 } 3493 if ($2.dst.host != NULL && 3494 $2.dst.host->addr.type != PF_ADDR_ADDRMASK && 3495 $2.dst.host->addr.type != PF_ADDR_TABLE) { 3496 yyerror("to must be an address or table"); 3497 YYERROR; 3498 } 3499 $$ = $2; 3500 } 3501 ; 3502 etherfromto : ALL { 3503 $$.src = NULL; 3504 $$.dst = NULL; 3505 } 3506 | etherfrom etherto { 3507 $$.src = $1.mac; 3508 $$.dst = $2.mac; 3509 } 3510 ; 3511 3512 etherfrom : /* emtpy */ { 3513 bzero(&$$, sizeof($$)); 3514 } 3515 | FROM macspec { 3516 $$.mac = $2; 3517 } 3518 ; 3519 3520 etherto : /* empty */ { 3521 bzero(&$$, sizeof($$)); 3522 } 3523 | TO macspec { 3524 $$.mac = $2; 3525 } 3526 ; 3527 3528 mac : string '/' NUMBER { 3529 $$ = node_mac_from_string_masklen($1, $3); 3530 free($1); 3531 if ($$ == NULL) 3532 YYERROR; 3533 } 3534 | string { 3535 if (strchr($1, '&')) { 3536 /* mac&mask */ 3537 char *mac = strtok($1, "&"); 3538 char *mask = strtok(NULL, "&"); 3539 $$ = node_mac_from_string_mask(mac, mask); 3540 } else { 3541 $$ = node_mac_from_string($1); 3542 } 3543 free($1); 3544 if ($$ == NULL) 3545 YYERROR; 3546 3547 } 3548 xmac : not mac { 3549 struct node_mac *n; 3550 3551 for (n = $2; n != NULL; n = n->next) 3552 n->neg = $1; 3553 $$ = $2; 3554 } 3555 ; 3556 macspec : xmac { 3557 $$ = $1; 3558 } 3559 | '{' optnl mac_list '}' 3560 { 3561 $$ = $3; 3562 } 3563 ; 3564 mac_list : xmac optnl { 3565 $$ = $1; 3566 } 3567 | mac_list comma xmac { 3568 if ($3 == NULL) 3569 $$ = $1; 3570 else if ($1 == NULL) 3571 $$ = $3; 3572 else { 3573 $1->tail->next = $3; 3574 $1->tail = $3->tail; 3575 $$ = $1; 3576 } 3577 } 3578 3579 fromto : ALL { 3580 $$.src.host = NULL; 3581 $$.src.port = NULL; 3582 $$.dst.host = NULL; 3583 $$.dst.port = NULL; 3584 $$.src_os = NULL; 3585 } 3586 | from os to { 3587 $$.src = $1; 3588 $$.src_os = $2; 3589 $$.dst = $3; 3590 } 3591 ; 3592 3593 os : /* empty */ { $$ = NULL; } 3594 | OS xos { $$ = $2; } 3595 | OS '{' optnl os_list '}' { $$ = $4; } 3596 ; 3597 3598 xos : STRING { 3599 $$ = calloc(1, sizeof(struct node_os)); 3600 if ($$ == NULL) 3601 err(1, "os: calloc"); 3602 $$->os = $1; 3603 $$->tail = $$; 3604 } 3605 ; 3606 3607 os_list : xos optnl { $$ = $1; } 3608 | os_list comma xos optnl { 3609 $1->tail->next = $3; 3610 $1->tail = $3; 3611 $$ = $1; 3612 } 3613 ; 3614 3615 from : /* empty */ { 3616 $$.host = NULL; 3617 $$.port = NULL; 3618 } 3619 | FROM ipportspec { 3620 $$ = $2; 3621 } 3622 ; 3623 3624 to : /* empty */ { 3625 $$.host = NULL; 3626 $$.port = NULL; 3627 } 3628 | TO ipportspec { 3629 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is " 3630 "not permitted in a destination address")) 3631 YYERROR; 3632 $$ = $2; 3633 } 3634 ; 3635 3636 ipportspec : ipspec { 3637 $$.host = $1; 3638 $$.port = NULL; 3639 } 3640 | ipspec PORT portspec { 3641 $$.host = $1; 3642 $$.port = $3; 3643 } 3644 | PORT portspec { 3645 $$.host = NULL; 3646 $$.port = $2; 3647 } 3648 ; 3649 3650 optnl : '\n' optnl 3651 | 3652 ; 3653 3654 ipspec : ANY { $$ = NULL; } 3655 | xhost { $$ = $1; } 3656 | '{' optnl host_list '}' { $$ = $3; } 3657 ; 3658 3659 toipspec : TO ipspec { $$ = $2; } 3660 | /* empty */ { $$ = NULL; } 3661 ; 3662 3663 host_list : ipspec optnl { $$ = $1; } 3664 | host_list comma ipspec optnl { 3665 if ($1 == NULL) { 3666 freehostlist($3); 3667 $$ = $1; 3668 } else if ($3 == NULL) { 3669 freehostlist($1); 3670 $$ = $3; 3671 } else { 3672 $1->tail->next = $3; 3673 $1->tail = $3->tail; 3674 $$ = $1; 3675 } 3676 } 3677 ; 3678 3679 xhost : not host { 3680 struct node_host *n; 3681 3682 for (n = $2; n != NULL; n = n->next) 3683 n->not = $1; 3684 $$ = $2; 3685 } 3686 | not NOROUTE { 3687 $$ = calloc(1, sizeof(struct node_host)); 3688 if ($$ == NULL) 3689 err(1, "xhost: calloc"); 3690 $$->addr.type = PF_ADDR_NOROUTE; 3691 $$->next = NULL; 3692 $$->not = $1; 3693 $$->tail = $$; 3694 } 3695 | not URPFFAILED { 3696 $$ = calloc(1, sizeof(struct node_host)); 3697 if ($$ == NULL) 3698 err(1, "xhost: calloc"); 3699 $$->addr.type = PF_ADDR_URPFFAILED; 3700 $$->next = NULL; 3701 $$->not = $1; 3702 $$->tail = $$; 3703 } 3704 ; 3705 3706 host : STRING { 3707 if (($$ = host($1)) == NULL) { 3708 /* error. "any" is handled elsewhere */ 3709 free($1); 3710 yyerror("could not parse host specification"); 3711 YYERROR; 3712 } 3713 free($1); 3714 3715 } 3716 | STRING '-' STRING { 3717 struct node_host *b, *e; 3718 3719 if ((b = host($1)) == NULL || (e = host($3)) == NULL) { 3720 free($1); 3721 free($3); 3722 yyerror("could not parse host specification"); 3723 YYERROR; 3724 } 3725 if (b->af != e->af || 3726 b->addr.type != PF_ADDR_ADDRMASK || 3727 e->addr.type != PF_ADDR_ADDRMASK || 3728 unmask(&b->addr.v.a.mask, b->af) != 3729 (b->af == AF_INET ? 32 : 128) || 3730 unmask(&e->addr.v.a.mask, e->af) != 3731 (e->af == AF_INET ? 32 : 128) || 3732 b->next != NULL || b->not || 3733 e->next != NULL || e->not) { 3734 free(b); 3735 free(e); 3736 free($1); 3737 free($3); 3738 yyerror("invalid address range"); 3739 YYERROR; 3740 } 3741 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr, 3742 sizeof(b->addr.v.a.mask)); 3743 b->addr.type = PF_ADDR_RANGE; 3744 $$ = b; 3745 free(e); 3746 free($1); 3747 free($3); 3748 } 3749 | STRING '/' NUMBER { 3750 char *buf; 3751 3752 if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1) 3753 err(1, "host: asprintf"); 3754 free($1); 3755 if (($$ = host(buf)) == NULL) { 3756 /* error. "any" is handled elsewhere */ 3757 free(buf); 3758 yyerror("could not parse host specification"); 3759 YYERROR; 3760 } 3761 free(buf); 3762 } 3763 | NUMBER '/' NUMBER { 3764 char *buf; 3765 3766 /* ie. for 10/8 parsing */ 3767 #ifdef __FreeBSD__ 3768 if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1) 3769 #else 3770 if (asprintf(&buf, "%lld/%lld", $1, $3) == -1) 3771 #endif 3772 err(1, "host: asprintf"); 3773 if (($$ = host(buf)) == NULL) { 3774 /* error. "any" is handled elsewhere */ 3775 free(buf); 3776 yyerror("could not parse host specification"); 3777 YYERROR; 3778 } 3779 free(buf); 3780 } 3781 | dynaddr 3782 | dynaddr '/' NUMBER { 3783 struct node_host *n; 3784 3785 if ($3 < 0 || $3 > 128) { 3786 yyerror("bit number too big"); 3787 YYERROR; 3788 } 3789 $$ = $1; 3790 for (n = $1; n != NULL; n = n->next) 3791 set_ipmask(n, $3); 3792 } 3793 | '<' STRING '>' { 3794 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 3795 yyerror("table name '%s' too long", $2); 3796 free($2); 3797 YYERROR; 3798 } 3799 $$ = calloc(1, sizeof(struct node_host)); 3800 if ($$ == NULL) 3801 err(1, "host: calloc"); 3802 $$->addr.type = PF_ADDR_TABLE; 3803 if (strlcpy($$->addr.v.tblname, $2, 3804 sizeof($$->addr.v.tblname)) >= 3805 sizeof($$->addr.v.tblname)) 3806 errx(1, "host: strlcpy"); 3807 free($2); 3808 $$->next = NULL; 3809 $$->tail = $$; 3810 } 3811 ; 3812 3813 number : NUMBER 3814 | STRING { 3815 u_long ulval; 3816 3817 if (atoul($1, &ulval) == -1) { 3818 yyerror("%s is not a number", $1); 3819 free($1); 3820 YYERROR; 3821 } else 3822 $$ = ulval; 3823 free($1); 3824 } 3825 ; 3826 3827 dynaddr : '(' STRING ')' { 3828 int flags = 0; 3829 char *p, *op; 3830 3831 op = $2; 3832 if (!isalpha(op[0])) { 3833 yyerror("invalid interface name '%s'", op); 3834 free(op); 3835 YYERROR; 3836 } 3837 while ((p = strrchr($2, ':')) != NULL) { 3838 if (!strcmp(p+1, "network")) 3839 flags |= PFI_AFLAG_NETWORK; 3840 else if (!strcmp(p+1, "broadcast")) 3841 flags |= PFI_AFLAG_BROADCAST; 3842 else if (!strcmp(p+1, "peer")) 3843 flags |= PFI_AFLAG_PEER; 3844 else if (!strcmp(p+1, "0")) 3845 flags |= PFI_AFLAG_NOALIAS; 3846 else { 3847 yyerror("interface %s has bad modifier", 3848 $2); 3849 free(op); 3850 YYERROR; 3851 } 3852 *p = '\0'; 3853 } 3854 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { 3855 free(op); 3856 yyerror("illegal combination of " 3857 "interface modifiers"); 3858 YYERROR; 3859 } 3860 $$ = calloc(1, sizeof(struct node_host)); 3861 if ($$ == NULL) 3862 err(1, "address: calloc"); 3863 $$->af = 0; 3864 set_ipmask($$, 128); 3865 $$->addr.type = PF_ADDR_DYNIFTL; 3866 $$->addr.iflags = flags; 3867 if (strlcpy($$->addr.v.ifname, $2, 3868 sizeof($$->addr.v.ifname)) >= 3869 sizeof($$->addr.v.ifname)) { 3870 free(op); 3871 free($$); 3872 yyerror("interface name too long"); 3873 YYERROR; 3874 } 3875 free(op); 3876 $$->next = NULL; 3877 $$->tail = $$; 3878 } 3879 ; 3880 3881 portspec : port_item { $$ = $1; } 3882 | '{' optnl port_list '}' { $$ = $3; } 3883 ; 3884 3885 port_list : port_item optnl { $$ = $1; } 3886 | port_list comma port_item optnl { 3887 $1->tail->next = $3; 3888 $1->tail = $3; 3889 $$ = $1; 3890 } 3891 ; 3892 3893 port_item : portrange { 3894 $$ = calloc(1, sizeof(struct node_port)); 3895 if ($$ == NULL) 3896 err(1, "port_item: calloc"); 3897 $$->port[0] = $1.a; 3898 $$->port[1] = $1.b; 3899 if ($1.t) 3900 $$->op = PF_OP_RRG; 3901 else 3902 $$->op = PF_OP_EQ; 3903 $$->next = NULL; 3904 $$->tail = $$; 3905 } 3906 | unaryop portrange { 3907 if ($2.t) { 3908 yyerror("':' cannot be used with an other " 3909 "port operator"); 3910 YYERROR; 3911 } 3912 $$ = calloc(1, sizeof(struct node_port)); 3913 if ($$ == NULL) 3914 err(1, "port_item: calloc"); 3915 $$->port[0] = $2.a; 3916 $$->port[1] = $2.b; 3917 $$->op = $1; 3918 $$->next = NULL; 3919 $$->tail = $$; 3920 } 3921 | portrange PORTBINARY portrange { 3922 if ($1.t || $3.t) { 3923 yyerror("':' cannot be used with an other " 3924 "port operator"); 3925 YYERROR; 3926 } 3927 $$ = calloc(1, sizeof(struct node_port)); 3928 if ($$ == NULL) 3929 err(1, "port_item: calloc"); 3930 $$->port[0] = $1.a; 3931 $$->port[1] = $3.a; 3932 $$->op = $2; 3933 $$->next = NULL; 3934 $$->tail = $$; 3935 } 3936 ; 3937 3938 portplain : numberstring { 3939 if (parseport($1, &$$, 0) == -1) { 3940 free($1); 3941 YYERROR; 3942 } 3943 free($1); 3944 } 3945 ; 3946 3947 portrange : numberstring { 3948 if (parseport($1, &$$, PPORT_RANGE) == -1) { 3949 free($1); 3950 YYERROR; 3951 } 3952 free($1); 3953 } 3954 ; 3955 3956 uids : uid_item { $$ = $1; } 3957 | '{' optnl uid_list '}' { $$ = $3; } 3958 ; 3959 3960 uid_list : uid_item optnl { $$ = $1; } 3961 | uid_list comma uid_item optnl { 3962 $1->tail->next = $3; 3963 $1->tail = $3; 3964 $$ = $1; 3965 } 3966 ; 3967 3968 uid_item : uid { 3969 $$ = calloc(1, sizeof(struct node_uid)); 3970 if ($$ == NULL) 3971 err(1, "uid_item: calloc"); 3972 $$->uid[0] = $1; 3973 $$->uid[1] = $1; 3974 $$->op = PF_OP_EQ; 3975 $$->next = NULL; 3976 $$->tail = $$; 3977 } 3978 | unaryop uid { 3979 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3980 yyerror("user unknown requires operator = or " 3981 "!="); 3982 YYERROR; 3983 } 3984 $$ = calloc(1, sizeof(struct node_uid)); 3985 if ($$ == NULL) 3986 err(1, "uid_item: calloc"); 3987 $$->uid[0] = $2; 3988 $$->uid[1] = $2; 3989 $$->op = $1; 3990 $$->next = NULL; 3991 $$->tail = $$; 3992 } 3993 | uid PORTBINARY uid { 3994 if ($1 == UID_MAX || $3 == UID_MAX) { 3995 yyerror("user unknown requires operator = or " 3996 "!="); 3997 YYERROR; 3998 } 3999 $$ = calloc(1, sizeof(struct node_uid)); 4000 if ($$ == NULL) 4001 err(1, "uid_item: calloc"); 4002 $$->uid[0] = $1; 4003 $$->uid[1] = $3; 4004 $$->op = $2; 4005 $$->next = NULL; 4006 $$->tail = $$; 4007 } 4008 ; 4009 4010 uid : STRING { 4011 if (!strcmp($1, "unknown")) 4012 $$ = UID_MAX; 4013 else { 4014 struct passwd *pw; 4015 4016 if ((pw = getpwnam($1)) == NULL) { 4017 yyerror("unknown user %s", $1); 4018 free($1); 4019 YYERROR; 4020 } 4021 $$ = pw->pw_uid; 4022 } 4023 free($1); 4024 } 4025 | NUMBER { 4026 if ($1 < 0 || $1 >= UID_MAX) { 4027 yyerror("illegal uid value %lu", $1); 4028 YYERROR; 4029 } 4030 $$ = $1; 4031 } 4032 ; 4033 4034 gids : gid_item { $$ = $1; } 4035 | '{' optnl gid_list '}' { $$ = $3; } 4036 ; 4037 4038 gid_list : gid_item optnl { $$ = $1; } 4039 | gid_list comma gid_item optnl { 4040 $1->tail->next = $3; 4041 $1->tail = $3; 4042 $$ = $1; 4043 } 4044 ; 4045 4046 gid_item : gid { 4047 $$ = calloc(1, sizeof(struct node_gid)); 4048 if ($$ == NULL) 4049 err(1, "gid_item: calloc"); 4050 $$->gid[0] = $1; 4051 $$->gid[1] = $1; 4052 $$->op = PF_OP_EQ; 4053 $$->next = NULL; 4054 $$->tail = $$; 4055 } 4056 | unaryop gid { 4057 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 4058 yyerror("group unknown requires operator = or " 4059 "!="); 4060 YYERROR; 4061 } 4062 $$ = calloc(1, sizeof(struct node_gid)); 4063 if ($$ == NULL) 4064 err(1, "gid_item: calloc"); 4065 $$->gid[0] = $2; 4066 $$->gid[1] = $2; 4067 $$->op = $1; 4068 $$->next = NULL; 4069 $$->tail = $$; 4070 } 4071 | gid PORTBINARY gid { 4072 if ($1 == GID_MAX || $3 == GID_MAX) { 4073 yyerror("group unknown requires operator = or " 4074 "!="); 4075 YYERROR; 4076 } 4077 $$ = calloc(1, sizeof(struct node_gid)); 4078 if ($$ == NULL) 4079 err(1, "gid_item: calloc"); 4080 $$->gid[0] = $1; 4081 $$->gid[1] = $3; 4082 $$->op = $2; 4083 $$->next = NULL; 4084 $$->tail = $$; 4085 } 4086 ; 4087 4088 gid : STRING { 4089 if (!strcmp($1, "unknown")) 4090 $$ = GID_MAX; 4091 else { 4092 struct group *grp; 4093 4094 if ((grp = getgrnam($1)) == NULL) { 4095 yyerror("unknown group %s", $1); 4096 free($1); 4097 YYERROR; 4098 } 4099 $$ = grp->gr_gid; 4100 } 4101 free($1); 4102 } 4103 | NUMBER { 4104 if ($1 < 0 || $1 >= GID_MAX) { 4105 yyerror("illegal gid value %lu", $1); 4106 YYERROR; 4107 } 4108 $$ = $1; 4109 } 4110 ; 4111 4112 flag : STRING { 4113 int f; 4114 4115 if ((f = parse_flags($1)) < 0) { 4116 yyerror("bad flags %s", $1); 4117 free($1); 4118 YYERROR; 4119 } 4120 free($1); 4121 $$.b1 = f; 4122 } 4123 ; 4124 4125 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 4126 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 4127 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; } 4128 ; 4129 4130 icmpspec : ICMPTYPE icmp_item { $$ = $2; } 4131 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; } 4132 | ICMP6TYPE icmp6_item { $$ = $2; } 4133 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; } 4134 ; 4135 4136 icmp_list : icmp_item optnl { $$ = $1; } 4137 | icmp_list comma icmp_item optnl { 4138 $1->tail->next = $3; 4139 $1->tail = $3; 4140 $$ = $1; 4141 } 4142 ; 4143 4144 icmp6_list : icmp6_item optnl { $$ = $1; } 4145 | icmp6_list comma icmp6_item optnl { 4146 $1->tail->next = $3; 4147 $1->tail = $3; 4148 $$ = $1; 4149 } 4150 ; 4151 4152 icmp_item : icmptype { 4153 $$ = calloc(1, sizeof(struct node_icmp)); 4154 if ($$ == NULL) 4155 err(1, "icmp_item: calloc"); 4156 $$->type = $1; 4157 $$->code = 0; 4158 $$->proto = IPPROTO_ICMP; 4159 $$->next = NULL; 4160 $$->tail = $$; 4161 } 4162 | icmptype CODE STRING { 4163 const struct icmpcodeent *p; 4164 4165 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) { 4166 yyerror("unknown icmp-code %s", $3); 4167 free($3); 4168 YYERROR; 4169 } 4170 4171 free($3); 4172 $$ = calloc(1, sizeof(struct node_icmp)); 4173 if ($$ == NULL) 4174 err(1, "icmp_item: calloc"); 4175 $$->type = $1; 4176 $$->code = p->code + 1; 4177 $$->proto = IPPROTO_ICMP; 4178 $$->next = NULL; 4179 $$->tail = $$; 4180 } 4181 | icmptype CODE NUMBER { 4182 if ($3 < 0 || $3 > 255) { 4183 yyerror("illegal icmp-code %lu", $3); 4184 YYERROR; 4185 } 4186 $$ = calloc(1, sizeof(struct node_icmp)); 4187 if ($$ == NULL) 4188 err(1, "icmp_item: calloc"); 4189 $$->type = $1; 4190 $$->code = $3 + 1; 4191 $$->proto = IPPROTO_ICMP; 4192 $$->next = NULL; 4193 $$->tail = $$; 4194 } 4195 ; 4196 4197 icmp6_item : icmp6type { 4198 $$ = calloc(1, sizeof(struct node_icmp)); 4199 if ($$ == NULL) 4200 err(1, "icmp_item: calloc"); 4201 $$->type = $1; 4202 $$->code = 0; 4203 $$->proto = IPPROTO_ICMPV6; 4204 $$->next = NULL; 4205 $$->tail = $$; 4206 } 4207 | icmp6type CODE STRING { 4208 const struct icmpcodeent *p; 4209 4210 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) { 4211 yyerror("unknown icmp6-code %s", $3); 4212 free($3); 4213 YYERROR; 4214 } 4215 free($3); 4216 4217 $$ = calloc(1, sizeof(struct node_icmp)); 4218 if ($$ == NULL) 4219 err(1, "icmp_item: calloc"); 4220 $$->type = $1; 4221 $$->code = p->code + 1; 4222 $$->proto = IPPROTO_ICMPV6; 4223 $$->next = NULL; 4224 $$->tail = $$; 4225 } 4226 | icmp6type CODE NUMBER { 4227 if ($3 < 0 || $3 > 255) { 4228 yyerror("illegal icmp-code %lu", $3); 4229 YYERROR; 4230 } 4231 $$ = calloc(1, sizeof(struct node_icmp)); 4232 if ($$ == NULL) 4233 err(1, "icmp_item: calloc"); 4234 $$->type = $1; 4235 $$->code = $3 + 1; 4236 $$->proto = IPPROTO_ICMPV6; 4237 $$->next = NULL; 4238 $$->tail = $$; 4239 } 4240 ; 4241 4242 icmptype : STRING { 4243 const struct icmptypeent *p; 4244 4245 if ((p = geticmptypebyname($1, AF_INET)) == NULL) { 4246 yyerror("unknown icmp-type %s", $1); 4247 free($1); 4248 YYERROR; 4249 } 4250 $$ = p->type + 1; 4251 free($1); 4252 } 4253 | NUMBER { 4254 if ($1 < 0 || $1 > 255) { 4255 yyerror("illegal icmp-type %lu", $1); 4256 YYERROR; 4257 } 4258 $$ = $1 + 1; 4259 } 4260 ; 4261 4262 icmp6type : STRING { 4263 const struct icmptypeent *p; 4264 4265 if ((p = geticmptypebyname($1, AF_INET6)) == 4266 NULL) { 4267 yyerror("unknown icmp6-type %s", $1); 4268 free($1); 4269 YYERROR; 4270 } 4271 $$ = p->type + 1; 4272 free($1); 4273 } 4274 | NUMBER { 4275 if ($1 < 0 || $1 > 255) { 4276 yyerror("illegal icmp6-type %lu", $1); 4277 YYERROR; 4278 } 4279 $$ = $1 + 1; 4280 } 4281 ; 4282 4283 tos : STRING { 4284 int val; 4285 char *end; 4286 4287 if (map_tos($1, &val)) 4288 $$ = val; 4289 else if ($1[0] == '0' && $1[1] == 'x') { 4290 errno = 0; 4291 $$ = strtoul($1, &end, 16); 4292 if (errno || *end != '\0') 4293 $$ = 256; 4294 } else 4295 $$ = 256; /* flag bad argument */ 4296 if ($$ < 0 || $$ > 255) { 4297 yyerror("illegal tos value %s", $1); 4298 free($1); 4299 YYERROR; 4300 } 4301 free($1); 4302 } 4303 | NUMBER { 4304 $$ = $1; 4305 if ($$ < 0 || $$ > 255) { 4306 yyerror("illegal tos value %lu", $1); 4307 YYERROR; 4308 } 4309 } 4310 ; 4311 4312 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; } 4313 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; } 4314 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; } 4315 ; 4316 4317 statelock : IFBOUND { 4318 $$ = PFRULE_IFBOUND; 4319 } 4320 | FLOATING { 4321 $$ = 0; 4322 } 4323 ; 4324 4325 keep : NO STATE { 4326 $$.action = 0; 4327 $$.options = NULL; 4328 } 4329 | KEEP STATE state_opt_spec { 4330 $$.action = PF_STATE_NORMAL; 4331 $$.options = $3; 4332 } 4333 | MODULATE STATE state_opt_spec { 4334 $$.action = PF_STATE_MODULATE; 4335 $$.options = $3; 4336 } 4337 | SYNPROXY STATE state_opt_spec { 4338 $$.action = PF_STATE_SYNPROXY; 4339 $$.options = $3; 4340 } 4341 ; 4342 4343 flush : /* empty */ { $$ = 0; } 4344 | FLUSH { $$ = PF_FLUSH; } 4345 | FLUSH GLOBAL { 4346 $$ = PF_FLUSH | PF_FLUSH_GLOBAL; 4347 } 4348 ; 4349 4350 state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 4351 | /* empty */ { $$ = NULL; } 4352 ; 4353 4354 state_opt_list : state_opt_item { $$ = $1; } 4355 | state_opt_list comma state_opt_item { 4356 $1->tail->next = $3; 4357 $1->tail = $3; 4358 $$ = $1; 4359 } 4360 ; 4361 4362 state_opt_item : MAXIMUM NUMBER { 4363 if ($2 < 0 || $2 > UINT_MAX) { 4364 yyerror("only positive values permitted"); 4365 YYERROR; 4366 } 4367 $$ = calloc(1, sizeof(struct node_state_opt)); 4368 if ($$ == NULL) 4369 err(1, "state_opt_item: calloc"); 4370 $$->type = PF_STATE_OPT_MAX; 4371 $$->data.max_states = $2; 4372 $$->next = NULL; 4373 $$->tail = $$; 4374 } 4375 | NOSYNC { 4376 $$ = calloc(1, sizeof(struct node_state_opt)); 4377 if ($$ == NULL) 4378 err(1, "state_opt_item: calloc"); 4379 $$->type = PF_STATE_OPT_NOSYNC; 4380 $$->next = NULL; 4381 $$->tail = $$; 4382 } 4383 | MAXSRCSTATES NUMBER { 4384 if ($2 < 0 || $2 > UINT_MAX) { 4385 yyerror("only positive values permitted"); 4386 YYERROR; 4387 } 4388 $$ = calloc(1, sizeof(struct node_state_opt)); 4389 if ($$ == NULL) 4390 err(1, "state_opt_item: calloc"); 4391 $$->type = PF_STATE_OPT_MAX_SRC_STATES; 4392 $$->data.max_src_states = $2; 4393 $$->next = NULL; 4394 $$->tail = $$; 4395 } 4396 | MAXSRCCONN NUMBER { 4397 if ($2 < 0 || $2 > UINT_MAX) { 4398 yyerror("only positive values permitted"); 4399 YYERROR; 4400 } 4401 $$ = calloc(1, sizeof(struct node_state_opt)); 4402 if ($$ == NULL) 4403 err(1, "state_opt_item: calloc"); 4404 $$->type = PF_STATE_OPT_MAX_SRC_CONN; 4405 $$->data.max_src_conn = $2; 4406 $$->next = NULL; 4407 $$->tail = $$; 4408 } 4409 | MAXSRCCONNRATE NUMBER '/' NUMBER { 4410 if ($2 < 0 || $2 > UINT_MAX || 4411 $4 < 0 || $4 > UINT_MAX) { 4412 yyerror("only positive values permitted"); 4413 YYERROR; 4414 } 4415 $$ = calloc(1, sizeof(struct node_state_opt)); 4416 if ($$ == NULL) 4417 err(1, "state_opt_item: calloc"); 4418 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE; 4419 $$->data.max_src_conn_rate.limit = $2; 4420 $$->data.max_src_conn_rate.seconds = $4; 4421 $$->next = NULL; 4422 $$->tail = $$; 4423 } 4424 | OVERLOAD '<' STRING '>' flush { 4425 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 4426 yyerror("table name '%s' too long", $3); 4427 free($3); 4428 YYERROR; 4429 } 4430 $$ = calloc(1, sizeof(struct node_state_opt)); 4431 if ($$ == NULL) 4432 err(1, "state_opt_item: calloc"); 4433 if (strlcpy($$->data.overload.tblname, $3, 4434 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE) 4435 errx(1, "state_opt_item: strlcpy"); 4436 free($3); 4437 $$->type = PF_STATE_OPT_OVERLOAD; 4438 $$->data.overload.flush = $5; 4439 $$->next = NULL; 4440 $$->tail = $$; 4441 } 4442 | MAXSRCNODES NUMBER { 4443 if ($2 < 0 || $2 > UINT_MAX) { 4444 yyerror("only positive values permitted"); 4445 YYERROR; 4446 } 4447 $$ = calloc(1, sizeof(struct node_state_opt)); 4448 if ($$ == NULL) 4449 err(1, "state_opt_item: calloc"); 4450 $$->type = PF_STATE_OPT_MAX_SRC_NODES; 4451 $$->data.max_src_nodes = $2; 4452 $$->next = NULL; 4453 $$->tail = $$; 4454 } 4455 | sourcetrack { 4456 $$ = calloc(1, sizeof(struct node_state_opt)); 4457 if ($$ == NULL) 4458 err(1, "state_opt_item: calloc"); 4459 $$->type = PF_STATE_OPT_SRCTRACK; 4460 $$->data.src_track = $1; 4461 $$->next = NULL; 4462 $$->tail = $$; 4463 } 4464 | statelock { 4465 $$ = calloc(1, sizeof(struct node_state_opt)); 4466 if ($$ == NULL) 4467 err(1, "state_opt_item: calloc"); 4468 $$->type = PF_STATE_OPT_STATELOCK; 4469 $$->data.statelock = $1; 4470 $$->next = NULL; 4471 $$->tail = $$; 4472 } 4473 | SLOPPY { 4474 $$ = calloc(1, sizeof(struct node_state_opt)); 4475 if ($$ == NULL) 4476 err(1, "state_opt_item: calloc"); 4477 $$->type = PF_STATE_OPT_SLOPPY; 4478 $$->next = NULL; 4479 $$->tail = $$; 4480 } 4481 | PFLOW { 4482 $$ = calloc(1, sizeof(struct node_state_opt)); 4483 if ($$ == NULL) 4484 err(1, "state_opt_item: calloc"); 4485 $$->type = PF_STATE_OPT_PFLOW; 4486 $$->next = NULL; 4487 $$->tail = $$; 4488 } 4489 | STRING NUMBER { 4490 int i; 4491 4492 if ($2 < 0 || $2 > UINT_MAX) { 4493 yyerror("only positive values permitted"); 4494 YYERROR; 4495 } 4496 for (i = 0; pf_timeouts[i].name && 4497 strcmp(pf_timeouts[i].name, $1); ++i) 4498 ; /* nothing */ 4499 if (!pf_timeouts[i].name) { 4500 yyerror("illegal timeout name %s", $1); 4501 free($1); 4502 YYERROR; 4503 } 4504 if (strchr(pf_timeouts[i].name, '.') == NULL) { 4505 yyerror("illegal state timeout %s", $1); 4506 free($1); 4507 YYERROR; 4508 } 4509 free($1); 4510 $$ = calloc(1, sizeof(struct node_state_opt)); 4511 if ($$ == NULL) 4512 err(1, "state_opt_item: calloc"); 4513 $$->type = PF_STATE_OPT_TIMEOUT; 4514 $$->data.timeout.number = pf_timeouts[i].timeout; 4515 $$->data.timeout.seconds = $2; 4516 $$->next = NULL; 4517 $$->tail = $$; 4518 } 4519 ; 4520 4521 label : LABEL STRING { 4522 $$ = $2; 4523 } 4524 ; 4525 4526 etherqname : QUEUE STRING { 4527 $$.qname = $2; 4528 } 4529 | QUEUE '(' STRING ')' { 4530 $$.qname = $3; 4531 } 4532 ; 4533 4534 qname : QUEUE STRING { 4535 $$.qname = $2; 4536 $$.pqname = NULL; 4537 } 4538 | QUEUE '(' STRING ')' { 4539 $$.qname = $3; 4540 $$.pqname = NULL; 4541 } 4542 | QUEUE '(' STRING comma STRING ')' { 4543 $$.qname = $3; 4544 $$.pqname = $5; 4545 } 4546 ; 4547 4548 no : /* empty */ { $$ = 0; } 4549 | NO { $$ = 1; } 4550 ; 4551 4552 portstar : numberstring { 4553 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) { 4554 free($1); 4555 YYERROR; 4556 } 4557 free($1); 4558 } 4559 ; 4560 4561 redirspec : host { $$ = $1; } 4562 | '{' optnl redir_host_list '}' { $$ = $3; } 4563 ; 4564 4565 redir_host_list : host optnl { $$ = $1; } 4566 | redir_host_list comma host optnl { 4567 $1->tail->next = $3; 4568 $1->tail = $3->tail; 4569 $$ = $1; 4570 } 4571 ; 4572 4573 redirpool : /* empty */ { $$ = NULL; } 4574 | ARROW redirspec { 4575 $$ = calloc(1, sizeof(struct redirection)); 4576 if ($$ == NULL) 4577 err(1, "redirection: calloc"); 4578 $$->host = $2; 4579 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4580 } 4581 | ARROW redirspec PORT portstar { 4582 $$ = calloc(1, sizeof(struct redirection)); 4583 if ($$ == NULL) 4584 err(1, "redirection: calloc"); 4585 $$->host = $2; 4586 $$->rport = $4; 4587 } 4588 ; 4589 4590 hashkey : /* empty */ 4591 { 4592 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4593 if ($$ == NULL) 4594 err(1, "hashkey: calloc"); 4595 $$->key32[0] = arc4random(); 4596 $$->key32[1] = arc4random(); 4597 $$->key32[2] = arc4random(); 4598 $$->key32[3] = arc4random(); 4599 } 4600 | string 4601 { 4602 if (!strncmp($1, "0x", 2)) { 4603 if (strlen($1) != 34) { 4604 free($1); 4605 yyerror("hex key must be 128 bits " 4606 "(32 hex digits) long"); 4607 YYERROR; 4608 } 4609 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4610 if ($$ == NULL) 4611 err(1, "hashkey: calloc"); 4612 4613 if (sscanf($1, "0x%8x%8x%8x%8x", 4614 &$$->key32[0], &$$->key32[1], 4615 &$$->key32[2], &$$->key32[3]) != 4) { 4616 free($$); 4617 free($1); 4618 yyerror("invalid hex key"); 4619 YYERROR; 4620 } 4621 } else { 4622 MD5_CTX context; 4623 4624 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4625 if ($$ == NULL) 4626 err(1, "hashkey: calloc"); 4627 MD5Init(&context); 4628 MD5Update(&context, (unsigned char *)$1, 4629 strlen($1)); 4630 MD5Final((unsigned char *)$$, &context); 4631 HTONL($$->key32[0]); 4632 HTONL($$->key32[1]); 4633 HTONL($$->key32[2]); 4634 HTONL($$->key32[3]); 4635 } 4636 free($1); 4637 } 4638 ; 4639 4640 pool_opts : { bzero(&pool_opts, sizeof pool_opts); } 4641 pool_opts_l 4642 { $$ = pool_opts; } 4643 | /* empty */ { 4644 bzero(&pool_opts, sizeof pool_opts); 4645 $$ = pool_opts; 4646 } 4647 ; 4648 4649 pool_opts_l : pool_opts_l pool_opt 4650 | pool_opt 4651 ; 4652 4653 pool_opt : BITMASK { 4654 if (pool_opts.type) { 4655 yyerror("pool type cannot be redefined"); 4656 YYERROR; 4657 } 4658 pool_opts.type = PF_POOL_BITMASK; 4659 } 4660 | RANDOM { 4661 if (pool_opts.type) { 4662 yyerror("pool type cannot be redefined"); 4663 YYERROR; 4664 } 4665 pool_opts.type = PF_POOL_RANDOM; 4666 } 4667 | SOURCEHASH hashkey { 4668 if (pool_opts.type) { 4669 yyerror("pool type cannot be redefined"); 4670 YYERROR; 4671 } 4672 pool_opts.type = PF_POOL_SRCHASH; 4673 pool_opts.key = $2; 4674 } 4675 | ROUNDROBIN { 4676 if (pool_opts.type) { 4677 yyerror("pool type cannot be redefined"); 4678 YYERROR; 4679 } 4680 pool_opts.type = PF_POOL_ROUNDROBIN; 4681 } 4682 | STATICPORT { 4683 if (pool_opts.staticport) { 4684 yyerror("static-port cannot be redefined"); 4685 YYERROR; 4686 } 4687 pool_opts.staticport = 1; 4688 } 4689 | STICKYADDRESS { 4690 if (pool_opts.marker & POM_STICKYADDRESS) { 4691 yyerror("sticky-address cannot be redefined"); 4692 YYERROR; 4693 } 4694 pool_opts.marker |= POM_STICKYADDRESS; 4695 pool_opts.opts |= PF_POOL_STICKYADDR; 4696 } 4697 | ENDPI { 4698 if (pool_opts.marker & POM_ENDPI) { 4699 yyerror("endpoint-independent cannot be redefined"); 4700 YYERROR; 4701 } 4702 pool_opts.marker |= POM_ENDPI; 4703 pool_opts.opts |= PF_POOL_ENDPI; 4704 } 4705 | MAPEPORTSET number '/' number '/' number { 4706 if (pool_opts.mape.offset) { 4707 yyerror("map-e-portset cannot be redefined"); 4708 YYERROR; 4709 } 4710 if (pool_opts.type) { 4711 yyerror("map-e-portset cannot be used with " 4712 "address pools"); 4713 YYERROR; 4714 } 4715 if ($2 <= 0 || $2 >= 16) { 4716 yyerror("MAP-E PSID offset must be 1-15"); 4717 YYERROR; 4718 } 4719 if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) { 4720 yyerror("Invalid MAP-E PSID length"); 4721 YYERROR; 4722 } else if ($4 == 0) { 4723 yyerror("PSID Length = 0: this means" 4724 " you do not need MAP-E"); 4725 YYERROR; 4726 } 4727 if ($6 < 0 || $6 > 65535) { 4728 yyerror("Invalid MAP-E PSID"); 4729 YYERROR; 4730 } 4731 pool_opts.mape.offset = $2; 4732 pool_opts.mape.psidlen = $4; 4733 pool_opts.mape.psid = $6; 4734 } 4735 ; 4736 4737 redirection : /* empty */ { $$ = NULL; } 4738 | ARROW host { 4739 $$ = calloc(1, sizeof(struct redirection)); 4740 if ($$ == NULL) 4741 err(1, "redirection: calloc"); 4742 $$->host = $2; 4743 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4744 } 4745 | ARROW host PORT portstar { 4746 $$ = calloc(1, sizeof(struct redirection)); 4747 if ($$ == NULL) 4748 err(1, "redirection: calloc"); 4749 $$->host = $2; 4750 $$->rport = $4; 4751 } 4752 ; 4753 4754 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; } 4755 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; } 4756 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; } 4757 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; } 4758 ; 4759 4760 nataction : no NAT natpasslog { 4761 if ($1 && $3.b1) { 4762 yyerror("\"pass\" not valid with \"no\""); 4763 YYERROR; 4764 } 4765 if ($1) 4766 $$.b1 = PF_NONAT; 4767 else 4768 $$.b1 = PF_NAT; 4769 $$.b2 = $3.b1; 4770 $$.w = $3.b2; 4771 $$.w2 = $3.w2; 4772 } 4773 | no RDR natpasslog { 4774 if ($1 && $3.b1) { 4775 yyerror("\"pass\" not valid with \"no\""); 4776 YYERROR; 4777 } 4778 if ($1) 4779 $$.b1 = PF_NORDR; 4780 else 4781 $$.b1 = PF_RDR; 4782 $$.b2 = $3.b1; 4783 $$.w = $3.b2; 4784 $$.w2 = $3.w2; 4785 } 4786 ; 4787 4788 natrule : nataction interface af proto fromto tag tagged rtable 4789 redirpool pool_opts 4790 { 4791 struct pfctl_rule r; 4792 struct node_state_opt *o; 4793 4794 if (check_rulestate(PFCTL_STATE_NAT)) 4795 YYERROR; 4796 4797 memset(&r, 0, sizeof(r)); 4798 4799 r.action = $1.b1; 4800 r.natpass = $1.b2; 4801 r.log = $1.w; 4802 r.logif = $1.w2; 4803 r.af = $3; 4804 4805 if (!r.af) { 4806 if ($5.src.host && $5.src.host->af && 4807 !$5.src.host->ifindex) 4808 r.af = $5.src.host->af; 4809 else if ($5.dst.host && $5.dst.host->af && 4810 !$5.dst.host->ifindex) 4811 r.af = $5.dst.host->af; 4812 } 4813 4814 if ($6 != NULL) 4815 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >= 4816 PF_TAG_NAME_SIZE) { 4817 yyerror("tag too long, max %u chars", 4818 PF_TAG_NAME_SIZE - 1); 4819 YYERROR; 4820 } 4821 4822 if ($7.name) 4823 if (strlcpy(r.match_tagname, $7.name, 4824 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4825 yyerror("tag too long, max %u chars", 4826 PF_TAG_NAME_SIZE - 1); 4827 YYERROR; 4828 } 4829 r.match_tag_not = $7.neg; 4830 r.rtableid = $8; 4831 4832 if (r.action == PF_NONAT || r.action == PF_NORDR) { 4833 if ($9 != NULL) { 4834 yyerror("translation rule with 'no' " 4835 "does not need '->'"); 4836 YYERROR; 4837 } 4838 } else { 4839 if ($9 == NULL || $9->host == NULL) { 4840 yyerror("translation rule requires '-> " 4841 "address'"); 4842 YYERROR; 4843 } 4844 if (!r.af && ! $9->host->ifindex) 4845 r.af = $9->host->af; 4846 4847 remove_invalid_hosts(&$9->host, &r.af); 4848 if (invalid_redirect($9->host, r.af)) 4849 YYERROR; 4850 if ($9->host->addr.type == PF_ADDR_DYNIFTL) { 4851 if (($9->host = gen_dynnode($9->host, r.af)) == NULL) 4852 err(1, "calloc"); 4853 } 4854 if (check_netmask($9->host, r.af)) 4855 YYERROR; 4856 4857 r.rpool.proxy_port[0] = ntohs($9->rport.a); 4858 4859 switch (r.action) { 4860 case PF_RDR: 4861 if (!$9->rport.b && $9->rport.t && 4862 $5.dst.port != NULL) { 4863 r.rpool.proxy_port[1] = 4864 ntohs($9->rport.a) + 4865 (ntohs( 4866 $5.dst.port->port[1]) - 4867 ntohs( 4868 $5.dst.port->port[0])); 4869 } else 4870 r.rpool.proxy_port[1] = 4871 ntohs($9->rport.b); 4872 break; 4873 case PF_NAT: 4874 r.rpool.proxy_port[1] = 4875 ntohs($9->rport.b); 4876 if (!r.rpool.proxy_port[0] && 4877 !r.rpool.proxy_port[1]) { 4878 r.rpool.proxy_port[0] = 4879 PF_NAT_PROXY_PORT_LOW; 4880 r.rpool.proxy_port[1] = 4881 PF_NAT_PROXY_PORT_HIGH; 4882 } else if (!r.rpool.proxy_port[1]) 4883 r.rpool.proxy_port[1] = 4884 r.rpool.proxy_port[0]; 4885 break; 4886 default: 4887 break; 4888 } 4889 4890 r.rpool.opts = $10.type; 4891 if ((r.rpool.opts & PF_POOL_TYPEMASK) == 4892 PF_POOL_NONE && ($9->host->next != NULL || 4893 $9->host->addr.type == PF_ADDR_TABLE || 4894 DYNIF_MULTIADDR($9->host->addr))) 4895 r.rpool.opts = PF_POOL_ROUNDROBIN; 4896 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4897 PF_POOL_ROUNDROBIN && 4898 disallow_table($9->host, "tables are only " 4899 "supported in round-robin redirection " 4900 "pools")) 4901 YYERROR; 4902 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4903 PF_POOL_ROUNDROBIN && 4904 disallow_alias($9->host, "interface (%s) " 4905 "is only supported in round-robin " 4906 "redirection pools")) 4907 YYERROR; 4908 if ($9->host->next != NULL) { 4909 if ((r.rpool.opts & PF_POOL_TYPEMASK) != 4910 PF_POOL_ROUNDROBIN) { 4911 yyerror("only round-robin " 4912 "valid for multiple " 4913 "redirection addresses"); 4914 YYERROR; 4915 } 4916 } 4917 } 4918 4919 if ($10.key != NULL) 4920 memcpy(&r.rpool.key, $10.key, 4921 sizeof(struct pf_poolhashkey)); 4922 4923 if ($10.opts) 4924 r.rpool.opts |= $10.opts; 4925 4926 if ($10.staticport) { 4927 if (r.action != PF_NAT) { 4928 yyerror("the 'static-port' option is " 4929 "only valid with nat rules"); 4930 YYERROR; 4931 } 4932 if (r.rpool.proxy_port[0] != 4933 PF_NAT_PROXY_PORT_LOW && 4934 r.rpool.proxy_port[1] != 4935 PF_NAT_PROXY_PORT_HIGH) { 4936 yyerror("the 'static-port' option can't" 4937 " be used when specifying a port" 4938 " range"); 4939 YYERROR; 4940 } 4941 r.rpool.proxy_port[0] = 0; 4942 r.rpool.proxy_port[1] = 0; 4943 } 4944 4945 if ($10.mape.offset) { 4946 if (r.action != PF_NAT) { 4947 yyerror("the 'map-e-portset' option is" 4948 " only valid with nat rules"); 4949 YYERROR; 4950 } 4951 if ($10.staticport) { 4952 yyerror("the 'map-e-portset' option" 4953 " can't be used 'static-port'"); 4954 YYERROR; 4955 } 4956 if (r.rpool.proxy_port[0] != 4957 PF_NAT_PROXY_PORT_LOW && 4958 r.rpool.proxy_port[1] != 4959 PF_NAT_PROXY_PORT_HIGH) { 4960 yyerror("the 'map-e-portset' option" 4961 " can't be used when specifying" 4962 " a port range"); 4963 YYERROR; 4964 } 4965 r.rpool.mape = $10.mape; 4966 } 4967 4968 o = keep_state_defaults; 4969 while (o) { 4970 switch (o->type) { 4971 case PF_STATE_OPT_PFLOW: 4972 if (r.rule_flag & PFRULE_PFLOW) { 4973 yyerror("state pflow option: " 4974 "multiple definitions"); 4975 YYERROR; 4976 } 4977 r.rule_flag |= PFRULE_PFLOW; 4978 break; 4979 } 4980 o = o->next; 4981 } 4982 4983 expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, NULL, $4, 4984 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 4985 $5.dst.port, 0, 0, 0, 0, ""); 4986 free($9); 4987 } 4988 ; 4989 4990 binatrule : no BINAT natpasslog interface af proto FROM ipspec toipspec tag 4991 tagged rtable redirection 4992 { 4993 struct pfctl_rule binat; 4994 struct pf_pooladdr *pa; 4995 4996 if (check_rulestate(PFCTL_STATE_NAT)) 4997 YYERROR; 4998 if (disallow_urpf_failed($9, "\"urpf-failed\" is not " 4999 "permitted as a binat destination")) 5000 YYERROR; 5001 5002 memset(&binat, 0, sizeof(binat)); 5003 5004 if ($1 && $3.b1) { 5005 yyerror("\"pass\" not valid with \"no\""); 5006 YYERROR; 5007 } 5008 if ($1) 5009 binat.action = PF_NOBINAT; 5010 else 5011 binat.action = PF_BINAT; 5012 binat.natpass = $3.b1; 5013 binat.log = $3.b2; 5014 binat.logif = $3.w2; 5015 binat.af = $5; 5016 if (!binat.af && $8 != NULL && $8->af) 5017 binat.af = $8->af; 5018 if (!binat.af && $9 != NULL && $9->af) 5019 binat.af = $9->af; 5020 5021 if (!binat.af && $13 != NULL && $13->host) 5022 binat.af = $13->host->af; 5023 if (!binat.af) { 5024 yyerror("address family (inet/inet6) " 5025 "undefined"); 5026 YYERROR; 5027 } 5028 5029 if ($4 != NULL) { 5030 memcpy(binat.ifname, $4->ifname, 5031 sizeof(binat.ifname)); 5032 binat.ifnot = $4->not; 5033 free($4); 5034 } 5035 5036 if ($10 != NULL) 5037 if (strlcpy(binat.tagname, $10, 5038 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 5039 yyerror("tag too long, max %u chars", 5040 PF_TAG_NAME_SIZE - 1); 5041 YYERROR; 5042 } 5043 if ($11.name) 5044 if (strlcpy(binat.match_tagname, $11.name, 5045 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 5046 yyerror("tag too long, max %u chars", 5047 PF_TAG_NAME_SIZE - 1); 5048 YYERROR; 5049 } 5050 binat.match_tag_not = $11.neg; 5051 binat.rtableid = $12; 5052 5053 if ($6 != NULL) { 5054 binat.proto = $6->proto; 5055 free($6); 5056 } 5057 5058 if ($8 != NULL && disallow_table($8, "invalid use of " 5059 "table <%s> as the source address of a binat rule")) 5060 YYERROR; 5061 if ($8 != NULL && disallow_alias($8, "invalid use of " 5062 "interface (%s) as the source address of a binat " 5063 "rule")) 5064 YYERROR; 5065 if ($13 != NULL && $13->host != NULL && disallow_table( 5066 $13->host, "invalid use of table <%s> as the " 5067 "redirect address of a binat rule")) 5068 YYERROR; 5069 if ($13 != NULL && $13->host != NULL && disallow_alias( 5070 $13->host, "invalid use of interface (%s) as the " 5071 "redirect address of a binat rule")) 5072 YYERROR; 5073 5074 if ($8 != NULL) { 5075 if ($8->next) { 5076 yyerror("multiple binat ip addresses"); 5077 YYERROR; 5078 } 5079 if ($8->addr.type == PF_ADDR_DYNIFTL) 5080 $8->af = binat.af; 5081 if ($8->af != binat.af) { 5082 yyerror("binat ip versions must match"); 5083 YYERROR; 5084 } 5085 if ($8->addr.type == PF_ADDR_DYNIFTL) { 5086 if (($8 = gen_dynnode($8, binat.af)) == NULL) 5087 err(1, "calloc"); 5088 } 5089 if (check_netmask($8, binat.af)) 5090 YYERROR; 5091 memcpy(&binat.src.addr, &$8->addr, 5092 sizeof(binat.src.addr)); 5093 free($8); 5094 } 5095 if ($9 != NULL) { 5096 if ($9->next) { 5097 yyerror("multiple binat ip addresses"); 5098 YYERROR; 5099 } 5100 if ($9->af != binat.af && $9->af) { 5101 yyerror("binat ip versions must match"); 5102 YYERROR; 5103 } 5104 if ($9->addr.type == PF_ADDR_DYNIFTL) { 5105 if (($9 = gen_dynnode($9, binat.af)) == NULL) 5106 err(1, "calloc"); 5107 } 5108 if (check_netmask($9, binat.af)) 5109 YYERROR; 5110 memcpy(&binat.dst.addr, &$9->addr, 5111 sizeof(binat.dst.addr)); 5112 binat.dst.neg = $9->not; 5113 free($9); 5114 } 5115 5116 if (binat.action == PF_NOBINAT) { 5117 if ($13 != NULL) { 5118 yyerror("'no binat' rule does not need" 5119 " '->'"); 5120 YYERROR; 5121 } 5122 } else { 5123 if ($13 == NULL || $13->host == NULL) { 5124 yyerror("'binat' rule requires" 5125 " '-> address'"); 5126 YYERROR; 5127 } 5128 5129 remove_invalid_hosts(&$13->host, &binat.af); 5130 if (invalid_redirect($13->host, binat.af)) 5131 YYERROR; 5132 if ($13->host->next != NULL) { 5133 yyerror("binat rule must redirect to " 5134 "a single address"); 5135 YYERROR; 5136 } 5137 if ($13->host->addr.type == PF_ADDR_DYNIFTL) { 5138 if (($13->host = gen_dynnode($13->host, binat.af)) == NULL) 5139 err(1, "calloc"); 5140 } 5141 if (check_netmask($13->host, binat.af)) 5142 YYERROR; 5143 5144 if (!PF_AZERO(&binat.src.addr.v.a.mask, 5145 binat.af) && 5146 !PF_AEQ(&binat.src.addr.v.a.mask, 5147 &$13->host->addr.v.a.mask, binat.af)) { 5148 yyerror("'binat' source mask and " 5149 "redirect mask must be the same"); 5150 YYERROR; 5151 } 5152 5153 TAILQ_INIT(&binat.rpool.list); 5154 pa = calloc(1, sizeof(struct pf_pooladdr)); 5155 if (pa == NULL) 5156 err(1, "binat: calloc"); 5157 pa->addr = $13->host->addr; 5158 pa->ifname[0] = 0; 5159 TAILQ_INSERT_TAIL(&binat.rpool.list, 5160 pa, entries); 5161 5162 free($13); 5163 } 5164 5165 pfctl_append_rule(pf, &binat, ""); 5166 } 5167 ; 5168 5169 tag : /* empty */ { $$ = NULL; } 5170 | TAG STRING { $$ = $2; } 5171 ; 5172 5173 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; } 5174 | not TAGGED string { $$.neg = $1; $$.name = $3; } 5175 ; 5176 5177 rtable : /* empty */ { $$ = -1; } 5178 | RTABLE NUMBER { 5179 if ($2 < 0 || $2 > rt_tableid_max()) { 5180 yyerror("invalid rtable id"); 5181 YYERROR; 5182 } 5183 $$ = $2; 5184 } 5185 ; 5186 5187 route_host : STRING { 5188 $$ = calloc(1, sizeof(struct node_host)); 5189 if ($$ == NULL) 5190 err(1, "route_host: calloc"); 5191 if (strlen($1) >= IFNAMSIZ) { 5192 yyerror("interface name too long"); 5193 YYERROR; 5194 } 5195 $$->ifname = strdup($1); 5196 set_ipmask($$, 128); 5197 $$->next = NULL; 5198 $$->tail = $$; 5199 } 5200 | '(' STRING host ')' { 5201 struct node_host *n; 5202 5203 $$ = $3; 5204 for (n = $3; n != NULL; n = n->next) { 5205 if (strlen($2) >= IFNAMSIZ) { 5206 yyerror("interface name too long"); 5207 YYERROR; 5208 } 5209 n->ifname = strdup($2); 5210 } 5211 } 5212 ; 5213 5214 route_host_list : route_host optnl { $$ = $1; } 5215 | route_host_list comma route_host optnl { 5216 if ($1->af == 0) 5217 $1->af = $3->af; 5218 if ($1->af != $3->af) { 5219 yyerror("all pool addresses must be in the " 5220 "same address family"); 5221 YYERROR; 5222 } 5223 $1->tail->next = $3; 5224 $1->tail = $3->tail; 5225 $$ = $1; 5226 } 5227 ; 5228 5229 routespec : route_host { $$ = $1; } 5230 | '{' optnl route_host_list '}' { $$ = $3; } 5231 ; 5232 5233 route : /* empty */ { 5234 $$.host = NULL; 5235 $$.rt = 0; 5236 $$.pool_opts = 0; 5237 } 5238 | FASTROUTE { 5239 /* backwards-compat */ 5240 $$.host = NULL; 5241 $$.rt = 0; 5242 $$.pool_opts = 0; 5243 } 5244 | ROUTETO routespec pool_opts { 5245 $$.host = $2; 5246 $$.rt = PF_ROUTETO; 5247 $$.pool_opts = $3.type | $3.opts; 5248 if ($3.key != NULL) 5249 $$.key = $3.key; 5250 } 5251 | REPLYTO routespec pool_opts { 5252 $$.host = $2; 5253 $$.rt = PF_REPLYTO; 5254 $$.pool_opts = $3.type | $3.opts; 5255 if ($3.key != NULL) 5256 $$.key = $3.key; 5257 } 5258 | DUPTO routespec pool_opts { 5259 $$.host = $2; 5260 $$.rt = PF_DUPTO; 5261 $$.pool_opts = $3.type | $3.opts; 5262 if ($3.key != NULL) 5263 $$.key = $3.key; 5264 } 5265 ; 5266 5267 timeout_spec : STRING NUMBER 5268 { 5269 if (check_rulestate(PFCTL_STATE_OPTION)) { 5270 free($1); 5271 YYERROR; 5272 } 5273 if ($2 < 0 || $2 > UINT_MAX) { 5274 yyerror("only positive values permitted"); 5275 YYERROR; 5276 } 5277 if (pfctl_apply_timeout(pf, $1, $2, 0) != 0) { 5278 yyerror("unknown timeout %s", $1); 5279 free($1); 5280 YYERROR; 5281 } 5282 free($1); 5283 } 5284 | INTERVAL NUMBER { 5285 if (check_rulestate(PFCTL_STATE_OPTION)) 5286 YYERROR; 5287 if ($2 < 0 || $2 > UINT_MAX) { 5288 yyerror("only positive values permitted"); 5289 YYERROR; 5290 } 5291 if (pfctl_apply_timeout(pf, "interval", $2, 0) != 0) 5292 YYERROR; 5293 } 5294 ; 5295 5296 timeout_list : timeout_list comma timeout_spec optnl 5297 | timeout_spec optnl 5298 ; 5299 5300 limit_spec : STRING NUMBER 5301 { 5302 if (check_rulestate(PFCTL_STATE_OPTION)) { 5303 free($1); 5304 YYERROR; 5305 } 5306 if ($2 < 0 || $2 > UINT_MAX) { 5307 yyerror("only positive values permitted"); 5308 YYERROR; 5309 } 5310 if (pfctl_apply_limit(pf, $1, $2) != 0) { 5311 yyerror("unable to set limit %s %u", $1, $2); 5312 free($1); 5313 YYERROR; 5314 } 5315 free($1); 5316 } 5317 ; 5318 5319 limit_list : limit_list comma limit_spec optnl 5320 | limit_spec optnl 5321 ; 5322 5323 comma : ',' 5324 | /* empty */ 5325 ; 5326 5327 yesno : NO { $$ = 0; } 5328 | STRING { 5329 if (!strcmp($1, "yes")) 5330 $$ = 1; 5331 else { 5332 yyerror("invalid value '%s', expected 'yes' " 5333 "or 'no'", $1); 5334 free($1); 5335 YYERROR; 5336 } 5337 free($1); 5338 } 5339 ; 5340 5341 unaryop : '=' { $$ = PF_OP_EQ; } 5342 | NE { $$ = PF_OP_NE; } 5343 | LE { $$ = PF_OP_LE; } 5344 | '<' { $$ = PF_OP_LT; } 5345 | GE { $$ = PF_OP_GE; } 5346 | '>' { $$ = PF_OP_GT; } 5347 ; 5348 5349 %% 5350 5351 int 5352 yyerror(const char *fmt, ...) 5353 { 5354 va_list ap; 5355 5356 file->errors++; 5357 va_start(ap, fmt); 5358 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno); 5359 vfprintf(stderr, fmt, ap); 5360 fprintf(stderr, "\n"); 5361 va_end(ap); 5362 return (0); 5363 } 5364 5365 int 5366 disallow_table(struct node_host *h, const char *fmt) 5367 { 5368 for (; h != NULL; h = h->next) 5369 if (h->addr.type == PF_ADDR_TABLE) { 5370 yyerror(fmt, h->addr.v.tblname); 5371 return (1); 5372 } 5373 return (0); 5374 } 5375 5376 int 5377 disallow_urpf_failed(struct node_host *h, const char *fmt) 5378 { 5379 for (; h != NULL; h = h->next) 5380 if (h->addr.type == PF_ADDR_URPFFAILED) { 5381 yyerror(fmt); 5382 return (1); 5383 } 5384 return (0); 5385 } 5386 5387 int 5388 disallow_alias(struct node_host *h, const char *fmt) 5389 { 5390 for (; h != NULL; h = h->next) 5391 if (DYNIF_MULTIADDR(h->addr)) { 5392 yyerror(fmt, h->addr.v.tblname); 5393 return (1); 5394 } 5395 return (0); 5396 } 5397 5398 int 5399 rule_consistent(struct pfctl_rule *r, int anchor_call) 5400 { 5401 int problems = 0; 5402 5403 switch (r->action) { 5404 case PF_PASS: 5405 case PF_MATCH: 5406 case PF_DROP: 5407 case PF_SCRUB: 5408 case PF_NOSCRUB: 5409 problems = filter_consistent(r, anchor_call); 5410 break; 5411 case PF_NAT: 5412 case PF_NONAT: 5413 problems = nat_consistent(r); 5414 break; 5415 case PF_RDR: 5416 case PF_NORDR: 5417 problems = rdr_consistent(r); 5418 break; 5419 case PF_BINAT: 5420 case PF_NOBINAT: 5421 default: 5422 break; 5423 } 5424 return (problems); 5425 } 5426 5427 int 5428 filter_consistent(struct pfctl_rule *r, int anchor_call) 5429 { 5430 int problems = 0; 5431 5432 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 5433 r->proto != IPPROTO_SCTP && 5434 (r->src.port_op || r->dst.port_op)) { 5435 yyerror("port only applies to tcp/udp/sctp"); 5436 problems++; 5437 } 5438 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 5439 (r->type || r->code)) { 5440 yyerror("icmp-type/code only applies to icmp"); 5441 problems++; 5442 } 5443 if (!r->af && (r->type || r->code)) { 5444 yyerror("must indicate address family with icmp-type/code"); 5445 problems++; 5446 } 5447 if (r->overload_tblname[0] && 5448 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) { 5449 yyerror("'overload' requires 'max-src-conn' " 5450 "or 'max-src-conn-rate'"); 5451 problems++; 5452 } 5453 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 5454 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 5455 yyerror("proto %s doesn't match address family %s", 5456 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 5457 r->af == AF_INET ? "inet" : "inet6"); 5458 problems++; 5459 } 5460 if (r->allow_opts && r->action != PF_PASS) { 5461 yyerror("allow-opts can only be specified for pass rules"); 5462 problems++; 5463 } 5464 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 5465 r->dst.port_op || r->flagset || r->type || r->code)) { 5466 yyerror("fragments can be filtered only on IP header fields"); 5467 problems++; 5468 } 5469 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 5470 yyerror("return-rst can only be applied to TCP rules"); 5471 problems++; 5472 } 5473 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) { 5474 yyerror("max-src-nodes requires 'source-track rule'"); 5475 problems++; 5476 } 5477 if (r->action != PF_PASS && r->keep_state) { 5478 yyerror("keep state is great, but only for pass rules"); 5479 problems++; 5480 } 5481 if (r->rule_flag & PFRULE_STATESLOPPY && 5482 (r->keep_state == PF_STATE_MODULATE || 5483 r->keep_state == PF_STATE_SYNPROXY)) { 5484 yyerror("sloppy state matching cannot be used with " 5485 "synproxy state or modulate state"); 5486 problems++; 5487 } 5488 /* match rules rules */ 5489 if (r->action == PF_MATCH) { 5490 if (r->divert.port) { 5491 yyerror("divert is not supported on match rules"); 5492 problems++; 5493 } 5494 if (r->rt) { 5495 yyerror("route-to, reply-to, dup-to and fastroute " 5496 "must not be used on match rules"); 5497 problems++; 5498 } 5499 if (r->naf != r->af) { 5500 yyerror("af-to is not supported on match rules"); 5501 problems++; 5502 } 5503 } 5504 if (r->rpool.opts & PF_POOL_STICKYADDR && !r->keep_state) { 5505 yyerror("'sticky-address' requires 'keep state'"); 5506 problems++; 5507 } 5508 return (-problems); 5509 } 5510 5511 int 5512 nat_consistent(struct pfctl_rule *r) 5513 { 5514 return (0); /* yeah! */ 5515 } 5516 5517 int 5518 rdr_consistent(struct pfctl_rule *r) 5519 { 5520 int problems = 0; 5521 5522 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 5523 r->proto != IPPROTO_SCTP) { 5524 if (r->src.port_op) { 5525 yyerror("src port only applies to tcp/udp/sctp"); 5526 problems++; 5527 } 5528 if (r->dst.port_op) { 5529 yyerror("dst port only applies to tcp/udp/sctp"); 5530 problems++; 5531 } 5532 if (r->rpool.proxy_port[0]) { 5533 yyerror("rpool port only applies to tcp/udp/sctp"); 5534 problems++; 5535 } 5536 } 5537 if (r->dst.port_op && 5538 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 5539 yyerror("invalid port operator for rdr destination port"); 5540 problems++; 5541 } 5542 return (-problems); 5543 } 5544 5545 int 5546 process_tabledef(char *name, struct table_opts *opts) 5547 { 5548 struct pfr_buffer ab; 5549 struct node_tinit *ti; 5550 unsigned long maxcount; 5551 size_t s = sizeof(maxcount); 5552 5553 bzero(&ab, sizeof(ab)); 5554 ab.pfrb_type = PFRB_ADDRS; 5555 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 5556 if (ti->file) 5557 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) { 5558 if (errno) 5559 yyerror("cannot load \"%s\": %s", 5560 ti->file, strerror(errno)); 5561 else 5562 yyerror("file \"%s\" contains bad data", 5563 ti->file); 5564 goto _error; 5565 } 5566 if (ti->host) 5567 if (append_addr_host(&ab, ti->host, 0, 0)) { 5568 yyerror("cannot create address buffer: %s", 5569 strerror(errno)); 5570 goto _error; 5571 } 5572 } 5573 if (pf->opts & PF_OPT_VERBOSE) 5574 print_tabledef(name, opts->flags, opts->init_addr, 5575 &opts->init_nodes); 5576 if (!(pf->opts & PF_OPT_NOACTION) && 5577 pfctl_define_table(name, opts->flags, opts->init_addr, 5578 pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) { 5579 5580 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s, 5581 NULL, 0) == -1) 5582 maxcount = 65535; 5583 5584 if (ab.pfrb_size > maxcount) 5585 yyerror("cannot define table %s: too many elements.\n" 5586 "Consider increasing net.pf.request_maxcount.", 5587 name); 5588 else 5589 yyerror("cannot define table %s: %s", name, 5590 pfr_strerror(errno)); 5591 5592 goto _error; 5593 } 5594 pf->tdirty = 1; 5595 pfr_buf_clear(&ab); 5596 return (0); 5597 _error: 5598 pfr_buf_clear(&ab); 5599 return (-1); 5600 } 5601 5602 struct keywords { 5603 const char *k_name; 5604 int k_val; 5605 }; 5606 5607 /* macro gore, but you should've seen the prior indentation nightmare... */ 5608 5609 #define FREE_LIST(T,r) \ 5610 do { \ 5611 T *p, *node = r; \ 5612 while (node != NULL) { \ 5613 p = node; \ 5614 node = node->next; \ 5615 free(p); \ 5616 } \ 5617 } while (0) 5618 5619 #define LOOP_THROUGH(T,n,r,C) \ 5620 do { \ 5621 T *n; \ 5622 if (r == NULL) { \ 5623 r = calloc(1, sizeof(T)); \ 5624 if (r == NULL) \ 5625 err(1, "LOOP: calloc"); \ 5626 r->next = NULL; \ 5627 } \ 5628 n = r; \ 5629 while (n != NULL) { \ 5630 do { \ 5631 C; \ 5632 } while (0); \ 5633 n = n->next; \ 5634 } \ 5635 } while (0) 5636 5637 void 5638 expand_label_str(char *label, size_t len, const char *srch, const char *repl) 5639 { 5640 char *tmp; 5641 char *p, *q; 5642 5643 if ((tmp = calloc(1, len)) == NULL) 5644 err(1, "expand_label_str: calloc"); 5645 p = q = label; 5646 while ((q = strstr(p, srch)) != NULL) { 5647 *q = '\0'; 5648 if ((strlcat(tmp, p, len) >= len) || 5649 (strlcat(tmp, repl, len) >= len)) 5650 errx(1, "expand_label: label too long"); 5651 q += strlen(srch); 5652 p = q; 5653 } 5654 if (strlcat(tmp, p, len) >= len) 5655 errx(1, "expand_label: label too long"); 5656 strlcpy(label, tmp, len); /* always fits */ 5657 free(tmp); 5658 } 5659 5660 void 5661 expand_label_if(const char *name, char *label, size_t len, const char *ifname) 5662 { 5663 if (strstr(label, name) != NULL) { 5664 if (!*ifname) 5665 expand_label_str(label, len, name, "any"); 5666 else 5667 expand_label_str(label, len, name, ifname); 5668 } 5669 } 5670 5671 void 5672 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af, 5673 struct pf_rule_addr *addr) 5674 { 5675 char tmp[64], tmp_not[66]; 5676 5677 if (strstr(label, name) != NULL) { 5678 switch (addr->addr.type) { 5679 case PF_ADDR_DYNIFTL: 5680 snprintf(tmp, sizeof(tmp), "(%s)", addr->addr.v.ifname); 5681 break; 5682 case PF_ADDR_TABLE: 5683 snprintf(tmp, sizeof(tmp), "<%s>", addr->addr.v.tblname); 5684 break; 5685 case PF_ADDR_NOROUTE: 5686 snprintf(tmp, sizeof(tmp), "no-route"); 5687 break; 5688 case PF_ADDR_URPFFAILED: 5689 snprintf(tmp, sizeof(tmp), "urpf-failed"); 5690 break; 5691 case PF_ADDR_ADDRMASK: 5692 if (!af || (PF_AZERO(&addr->addr.v.a.addr, af) && 5693 PF_AZERO(&addr->addr.v.a.mask, af))) 5694 snprintf(tmp, sizeof(tmp), "any"); 5695 else { 5696 char a[48]; 5697 int bits; 5698 5699 if (inet_ntop(af, &addr->addr.v.a.addr, a, 5700 sizeof(a)) == NULL) 5701 snprintf(tmp, sizeof(tmp), "?"); 5702 else { 5703 bits = unmask(&addr->addr.v.a.mask, af); 5704 if ((af == AF_INET && bits < 32) || 5705 (af == AF_INET6 && bits < 128)) 5706 snprintf(tmp, sizeof(tmp), 5707 "%s/%d", a, bits); 5708 else 5709 snprintf(tmp, sizeof(tmp), 5710 "%s", a); 5711 } 5712 } 5713 break; 5714 default: 5715 snprintf(tmp, sizeof(tmp), "?"); 5716 break; 5717 } 5718 5719 if (addr->neg) { 5720 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 5721 expand_label_str(label, len, name, tmp_not); 5722 } else 5723 expand_label_str(label, len, name, tmp); 5724 } 5725 } 5726 5727 void 5728 expand_label_port(const char *name, char *label, size_t len, 5729 struct pf_rule_addr *addr) 5730 { 5731 char a1[6], a2[6], op[13] = ""; 5732 5733 if (strstr(label, name) != NULL) { 5734 snprintf(a1, sizeof(a1), "%u", ntohs(addr->port[0])); 5735 snprintf(a2, sizeof(a2), "%u", ntohs(addr->port[1])); 5736 if (!addr->port_op) 5737 ; 5738 else if (addr->port_op == PF_OP_IRG) 5739 snprintf(op, sizeof(op), "%s><%s", a1, a2); 5740 else if (addr->port_op == PF_OP_XRG) 5741 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 5742 else if (addr->port_op == PF_OP_EQ) 5743 snprintf(op, sizeof(op), "%s", a1); 5744 else if (addr->port_op == PF_OP_NE) 5745 snprintf(op, sizeof(op), "!=%s", a1); 5746 else if (addr->port_op == PF_OP_LT) 5747 snprintf(op, sizeof(op), "<%s", a1); 5748 else if (addr->port_op == PF_OP_LE) 5749 snprintf(op, sizeof(op), "<=%s", a1); 5750 else if (addr->port_op == PF_OP_GT) 5751 snprintf(op, sizeof(op), ">%s", a1); 5752 else if (addr->port_op == PF_OP_GE) 5753 snprintf(op, sizeof(op), ">=%s", a1); 5754 expand_label_str(label, len, name, op); 5755 } 5756 } 5757 5758 void 5759 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto) 5760 { 5761 const char *protoname; 5762 char n[4]; 5763 5764 if (strstr(label, name) != NULL) { 5765 protoname = pfctl_proto2name(proto); 5766 if (protoname != NULL) 5767 expand_label_str(label, len, name, protoname); 5768 else { 5769 snprintf(n, sizeof(n), "%u", proto); 5770 expand_label_str(label, len, name, n); 5771 } 5772 } 5773 } 5774 5775 void 5776 expand_label_nr(const char *name, char *label, size_t len, 5777 struct pfctl_rule *r) 5778 { 5779 char n[11]; 5780 5781 if (strstr(label, name) != NULL) { 5782 snprintf(n, sizeof(n), "%u", r->nr); 5783 expand_label_str(label, len, name, n); 5784 } 5785 } 5786 5787 void 5788 expand_label(char *label, size_t len, struct pfctl_rule *r) 5789 { 5790 expand_label_if("$if", label, len, r->ifname); 5791 expand_label_addr("$srcaddr", label, len, r->af, &r->src); 5792 expand_label_addr("$dstaddr", label, len, r->af, &r->dst); 5793 expand_label_port("$srcport", label, len, &r->src); 5794 expand_label_port("$dstport", label, len, &r->dst); 5795 expand_label_proto("$proto", label, len, r->proto); 5796 expand_label_nr("$nr", label, len, r); 5797 } 5798 5799 int 5800 expand_altq(struct pf_altq *a, struct node_if *interfaces, 5801 struct node_queue *nqueues, struct node_queue_bw bwspec, 5802 struct node_queue_opt *opts) 5803 { 5804 struct pf_altq pa, pb; 5805 char qname[PF_QNAME_SIZE]; 5806 struct node_queue *n; 5807 struct node_queue_bw bw; 5808 int errs = 0; 5809 5810 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5811 FREE_LIST(struct node_if, interfaces); 5812 if (nqueues) 5813 FREE_LIST(struct node_queue, nqueues); 5814 return (0); 5815 } 5816 5817 LOOP_THROUGH(struct node_if, interface, interfaces, 5818 memcpy(&pa, a, sizeof(struct pf_altq)); 5819 if (strlcpy(pa.ifname, interface->ifname, 5820 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5821 errx(1, "expand_altq: strlcpy"); 5822 5823 if (interface->not) { 5824 yyerror("altq on ! <interface> is not supported"); 5825 errs++; 5826 } else { 5827 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 5828 errs++; 5829 else 5830 if (pfctl_add_altq(pf, &pa)) 5831 errs++; 5832 5833 if (pf->opts & PF_OPT_VERBOSE) { 5834 print_altq(&pf->paltq->altq, 0, 5835 &bwspec, opts); 5836 if (nqueues && nqueues->tail) { 5837 printf("queue { "); 5838 LOOP_THROUGH(struct node_queue, queue, 5839 nqueues, 5840 printf("%s ", 5841 queue->queue); 5842 ); 5843 printf("}"); 5844 } 5845 printf("\n"); 5846 } 5847 5848 if (pa.scheduler == ALTQT_CBQ || 5849 pa.scheduler == ALTQT_HFSC || 5850 pa.scheduler == ALTQT_FAIRQ) { 5851 /* now create a root queue */ 5852 memset(&pb, 0, sizeof(struct pf_altq)); 5853 if (strlcpy(qname, "root_", sizeof(qname)) >= 5854 sizeof(qname)) 5855 errx(1, "expand_altq: strlcpy"); 5856 if (strlcat(qname, interface->ifname, 5857 sizeof(qname)) >= sizeof(qname)) 5858 errx(1, "expand_altq: strlcat"); 5859 if (strlcpy(pb.qname, qname, 5860 sizeof(pb.qname)) >= sizeof(pb.qname)) 5861 errx(1, "expand_altq: strlcpy"); 5862 if (strlcpy(pb.ifname, interface->ifname, 5863 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 5864 errx(1, "expand_altq: strlcpy"); 5865 pb.qlimit = pa.qlimit; 5866 pb.scheduler = pa.scheduler; 5867 bw.bw_absolute = pa.ifbandwidth; 5868 bw.bw_percent = 0; 5869 if (eval_pfqueue(pf, &pb, &bw, opts)) 5870 errs++; 5871 else 5872 if (pfctl_add_altq(pf, &pb)) 5873 errs++; 5874 } 5875 5876 LOOP_THROUGH(struct node_queue, queue, nqueues, 5877 n = calloc(1, sizeof(struct node_queue)); 5878 if (n == NULL) 5879 err(1, "expand_altq: calloc"); 5880 if (pa.scheduler == ALTQT_CBQ || 5881 pa.scheduler == ALTQT_HFSC || 5882 pa.scheduler == ALTQT_FAIRQ) 5883 if (strlcpy(n->parent, qname, 5884 sizeof(n->parent)) >= 5885 sizeof(n->parent)) 5886 errx(1, "expand_altq: strlcpy"); 5887 if (strlcpy(n->queue, queue->queue, 5888 sizeof(n->queue)) >= sizeof(n->queue)) 5889 errx(1, "expand_altq: strlcpy"); 5890 if (strlcpy(n->ifname, interface->ifname, 5891 sizeof(n->ifname)) >= sizeof(n->ifname)) 5892 errx(1, "expand_altq: strlcpy"); 5893 n->scheduler = pa.scheduler; 5894 n->next = NULL; 5895 n->tail = n; 5896 if (queues == NULL) 5897 queues = n; 5898 else { 5899 queues->tail->next = n; 5900 queues->tail = n; 5901 } 5902 ); 5903 } 5904 ); 5905 FREE_LIST(struct node_if, interfaces); 5906 if (nqueues) 5907 FREE_LIST(struct node_queue, nqueues); 5908 5909 return (errs); 5910 } 5911 5912 int 5913 expand_queue(struct pf_altq *a, struct node_if *interfaces, 5914 struct node_queue *nqueues, struct node_queue_bw bwspec, 5915 struct node_queue_opt *opts) 5916 { 5917 struct node_queue *n, *nq; 5918 struct pf_altq pa; 5919 u_int8_t found = 0; 5920 u_int8_t errs = 0; 5921 5922 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5923 FREE_LIST(struct node_queue, nqueues); 5924 return (0); 5925 } 5926 5927 if (queues == NULL) { 5928 yyerror("queue %s has no parent", a->qname); 5929 FREE_LIST(struct node_queue, nqueues); 5930 return (1); 5931 } 5932 5933 LOOP_THROUGH(struct node_if, interface, interfaces, 5934 LOOP_THROUGH(struct node_queue, tqueue, queues, 5935 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 5936 (interface->ifname[0] == 0 || 5937 (!interface->not && !strncmp(interface->ifname, 5938 tqueue->ifname, IFNAMSIZ)) || 5939 (interface->not && strncmp(interface->ifname, 5940 tqueue->ifname, IFNAMSIZ)))) { 5941 /* found ourself in queues */ 5942 found++; 5943 5944 memcpy(&pa, a, sizeof(struct pf_altq)); 5945 5946 if (pa.scheduler != ALTQT_NONE && 5947 pa.scheduler != tqueue->scheduler) { 5948 yyerror("exactly one scheduler type " 5949 "per interface allowed"); 5950 return (1); 5951 } 5952 pa.scheduler = tqueue->scheduler; 5953 5954 /* scheduler dependent error checking */ 5955 switch (pa.scheduler) { 5956 case ALTQT_PRIQ: 5957 if (nqueues != NULL) { 5958 yyerror("priq queues cannot " 5959 "have child queues"); 5960 return (1); 5961 } 5962 if (bwspec.bw_absolute > 0 || 5963 bwspec.bw_percent < 100) { 5964 yyerror("priq doesn't take " 5965 "bandwidth"); 5966 return (1); 5967 } 5968 break; 5969 default: 5970 break; 5971 } 5972 5973 if (strlcpy(pa.ifname, tqueue->ifname, 5974 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5975 errx(1, "expand_queue: strlcpy"); 5976 if (strlcpy(pa.parent, tqueue->parent, 5977 sizeof(pa.parent)) >= sizeof(pa.parent)) 5978 errx(1, "expand_queue: strlcpy"); 5979 5980 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 5981 errs++; 5982 else 5983 if (pfctl_add_altq(pf, &pa)) 5984 errs++; 5985 5986 for (nq = nqueues; nq != NULL; nq = nq->next) { 5987 if (!strcmp(a->qname, nq->queue)) { 5988 yyerror("queue cannot have " 5989 "itself as child"); 5990 errs++; 5991 continue; 5992 } 5993 n = calloc(1, 5994 sizeof(struct node_queue)); 5995 if (n == NULL) 5996 err(1, "expand_queue: calloc"); 5997 if (strlcpy(n->parent, a->qname, 5998 sizeof(n->parent)) >= 5999 sizeof(n->parent)) 6000 errx(1, "expand_queue strlcpy"); 6001 if (strlcpy(n->queue, nq->queue, 6002 sizeof(n->queue)) >= 6003 sizeof(n->queue)) 6004 errx(1, "expand_queue strlcpy"); 6005 if (strlcpy(n->ifname, tqueue->ifname, 6006 sizeof(n->ifname)) >= 6007 sizeof(n->ifname)) 6008 errx(1, "expand_queue strlcpy"); 6009 n->scheduler = tqueue->scheduler; 6010 n->next = NULL; 6011 n->tail = n; 6012 if (queues == NULL) 6013 queues = n; 6014 else { 6015 queues->tail->next = n; 6016 queues->tail = n; 6017 } 6018 } 6019 if ((pf->opts & PF_OPT_VERBOSE) && ( 6020 (found == 1 && interface->ifname[0] == 0) || 6021 (found > 0 && interface->ifname[0] != 0))) { 6022 print_queue(&pf->paltq->altq, 0, 6023 &bwspec, interface->ifname[0] != 0, 6024 opts); 6025 if (nqueues && nqueues->tail) { 6026 printf("{ "); 6027 LOOP_THROUGH(struct node_queue, 6028 queue, nqueues, 6029 printf("%s ", 6030 queue->queue); 6031 ); 6032 printf("}"); 6033 } 6034 printf("\n"); 6035 } 6036 } 6037 ); 6038 ); 6039 6040 FREE_LIST(struct node_queue, nqueues); 6041 FREE_LIST(struct node_if, interfaces); 6042 6043 if (!found) { 6044 yyerror("queue %s has no parent", a->qname); 6045 errs++; 6046 } 6047 6048 if (errs) 6049 return (1); 6050 else 6051 return (0); 6052 } 6053 6054 static int 6055 pf_af_to_proto(sa_family_t af) 6056 { 6057 if (af == AF_INET) 6058 return (ETHERTYPE_IP); 6059 if (af == AF_INET6) 6060 return (ETHERTYPE_IPV6); 6061 6062 return (0); 6063 } 6064 6065 void 6066 expand_eth_rule(struct pfctl_eth_rule *r, 6067 struct node_if *interfaces, struct node_etherproto *protos, 6068 struct node_mac *srcs, struct node_mac *dsts, 6069 struct node_host *ipsrcs, struct node_host *ipdsts, 6070 const char *bridge_to, const char *anchor_call) 6071 { 6072 char tagname[PF_TAG_NAME_SIZE]; 6073 char match_tagname[PF_TAG_NAME_SIZE]; 6074 char qname[PF_QNAME_SIZE]; 6075 6076 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 6077 errx(1, "expand_eth_rule: tagname"); 6078 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 6079 sizeof(match_tagname)) 6080 errx(1, "expand_eth_rule: match_tagname"); 6081 if (strlcpy(qname, r->qname, sizeof(qname)) >= sizeof(qname)) 6082 errx(1, "expand_eth_rule: qname"); 6083 6084 LOOP_THROUGH(struct node_if, interface, interfaces, 6085 LOOP_THROUGH(struct node_etherproto, proto, protos, 6086 LOOP_THROUGH(struct node_mac, src, srcs, 6087 LOOP_THROUGH(struct node_mac, dst, dsts, 6088 LOOP_THROUGH(struct node_host, ipsrc, ipsrcs, 6089 LOOP_THROUGH(struct node_host, ipdst, ipdsts, 6090 strlcpy(r->ifname, interface->ifname, 6091 sizeof(r->ifname)); 6092 r->ifnot = interface->not; 6093 r->proto = proto->proto; 6094 if (!r->proto && ipsrc->af) 6095 r->proto = pf_af_to_proto(ipsrc->af); 6096 else if (!r->proto && ipdst->af) 6097 r->proto = pf_af_to_proto(ipdst->af); 6098 bcopy(src->mac, r->src.addr, ETHER_ADDR_LEN); 6099 bcopy(src->mask, r->src.mask, ETHER_ADDR_LEN); 6100 r->src.neg = src->neg; 6101 r->src.isset = src->isset; 6102 r->ipsrc.addr = ipsrc->addr; 6103 r->ipsrc.neg = ipsrc->not; 6104 r->ipdst.addr = ipdst->addr; 6105 r->ipdst.neg = ipdst->not; 6106 bcopy(dst->mac, r->dst.addr, ETHER_ADDR_LEN); 6107 bcopy(dst->mask, r->dst.mask, ETHER_ADDR_LEN); 6108 r->dst.neg = dst->neg; 6109 r->dst.isset = dst->isset; 6110 r->nr = pf->eastack[pf->asd]->match++; 6111 6112 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 6113 sizeof(r->tagname)) 6114 errx(1, "expand_eth_rule: r->tagname"); 6115 if (strlcpy(r->match_tagname, match_tagname, 6116 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 6117 errx(1, "expand_eth_rule: r->match_tagname"); 6118 if (strlcpy(r->qname, qname, sizeof(r->qname)) >= sizeof(r->qname)) 6119 errx(1, "expand_eth_rule: r->qname"); 6120 6121 if (bridge_to) 6122 strlcpy(r->bridge_to, bridge_to, sizeof(r->bridge_to)); 6123 6124 pfctl_append_eth_rule(pf, r, anchor_call); 6125 )))))); 6126 6127 FREE_LIST(struct node_if, interfaces); 6128 FREE_LIST(struct node_etherproto, protos); 6129 FREE_LIST(struct node_mac, srcs); 6130 FREE_LIST(struct node_mac, dsts); 6131 FREE_LIST(struct node_host, ipsrcs); 6132 FREE_LIST(struct node_host, ipdsts); 6133 } 6134 6135 void 6136 expand_rule(struct pfctl_rule *r, 6137 struct node_if *interfaces, struct node_host *rdr_hosts, 6138 struct node_host *nat_hosts, 6139 struct node_proto *protos, struct node_os *src_oses, 6140 struct node_host *src_hosts, struct node_port *src_ports, 6141 struct node_host *dst_hosts, struct node_port *dst_ports, 6142 struct node_uid *uids, struct node_gid *gids, struct node_if *rcv, 6143 struct node_icmp *icmp_types, const char *anchor_call) 6144 { 6145 sa_family_t af = r->af; 6146 int added = 0, error = 0; 6147 char ifname[IF_NAMESIZE]; 6148 char label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE]; 6149 char tagname[PF_TAG_NAME_SIZE]; 6150 char match_tagname[PF_TAG_NAME_SIZE]; 6151 struct pf_pooladdr *pa; 6152 struct node_host *h, *osrch, *odsth; 6153 u_int8_t flags, flagset, keep_state; 6154 6155 memcpy(label, r->label, sizeof(r->label)); 6156 assert(sizeof(r->label) == sizeof(label)); 6157 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 6158 errx(1, "expand_rule: strlcpy"); 6159 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 6160 sizeof(match_tagname)) 6161 errx(1, "expand_rule: strlcpy"); 6162 flags = r->flags; 6163 flagset = r->flagset; 6164 keep_state = r->keep_state; 6165 6166 LOOP_THROUGH(struct node_if, interface, interfaces, 6167 LOOP_THROUGH(struct node_proto, proto, protos, 6168 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 6169 LOOP_THROUGH(struct node_host, src_host, src_hosts, 6170 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 6171 LOOP_THROUGH(struct node_port, src_port, src_ports, 6172 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 6173 LOOP_THROUGH(struct node_os, src_os, src_oses, 6174 LOOP_THROUGH(struct node_uid, uid, uids, 6175 LOOP_THROUGH(struct node_gid, gid, gids, 6176 6177 r->af = af; 6178 /* for link-local IPv6 address, interface must match up */ 6179 if ((r->af && src_host->af && r->af != src_host->af) || 6180 (r->af && dst_host->af && r->af != dst_host->af) || 6181 (src_host->af && dst_host->af && 6182 src_host->af != dst_host->af) || 6183 (src_host->ifindex && dst_host->ifindex && 6184 src_host->ifindex != dst_host->ifindex) || 6185 (src_host->ifindex && *interface->ifname && 6186 src_host->ifindex != if_nametoindex(interface->ifname)) || 6187 (dst_host->ifindex && *interface->ifname && 6188 dst_host->ifindex != if_nametoindex(interface->ifname))) 6189 continue; 6190 if (!r->af && src_host->af) 6191 r->af = src_host->af; 6192 else if (!r->af && dst_host->af) 6193 r->af = dst_host->af; 6194 6195 if (*interface->ifname) 6196 strlcpy(r->ifname, interface->ifname, 6197 sizeof(r->ifname)); 6198 else if (if_indextoname(src_host->ifindex, ifname)) 6199 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 6200 else if (if_indextoname(dst_host->ifindex, ifname)) 6201 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 6202 else 6203 memset(r->ifname, '\0', sizeof(r->ifname)); 6204 6205 memcpy(r->label, label, sizeof(r->label)); 6206 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 6207 sizeof(r->tagname)) 6208 errx(1, "expand_rule: strlcpy"); 6209 if (strlcpy(r->match_tagname, match_tagname, 6210 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 6211 errx(1, "expand_rule: strlcpy"); 6212 6213 osrch = odsth = NULL; 6214 if (src_host->addr.type == PF_ADDR_DYNIFTL) { 6215 osrch = src_host; 6216 if ((src_host = gen_dynnode(src_host, r->af)) == NULL) 6217 err(1, "expand_rule: calloc"); 6218 } 6219 if (dst_host->addr.type == PF_ADDR_DYNIFTL) { 6220 odsth = dst_host; 6221 if ((dst_host = gen_dynnode(dst_host, r->af)) == NULL) 6222 err(1, "expand_rule: calloc"); 6223 } 6224 6225 error += check_netmask(src_host, r->af); 6226 error += check_netmask(dst_host, r->af); 6227 6228 r->ifnot = interface->not; 6229 r->proto = proto->proto; 6230 r->src.addr = src_host->addr; 6231 r->src.neg = src_host->not; 6232 r->src.port[0] = src_port->port[0]; 6233 r->src.port[1] = src_port->port[1]; 6234 r->src.port_op = src_port->op; 6235 r->dst.addr = dst_host->addr; 6236 r->dst.neg = dst_host->not; 6237 r->dst.port[0] = dst_port->port[0]; 6238 r->dst.port[1] = dst_port->port[1]; 6239 r->dst.port_op = dst_port->op; 6240 r->uid.op = uid->op; 6241 r->uid.uid[0] = uid->uid[0]; 6242 r->uid.uid[1] = uid->uid[1]; 6243 r->gid.op = gid->op; 6244 r->gid.gid[0] = gid->gid[0]; 6245 r->gid.gid[1] = gid->gid[1]; 6246 if (rcv) { 6247 strlcpy(r->rcv_ifname, rcv->ifname, 6248 sizeof(r->rcv_ifname)); 6249 } 6250 r->type = icmp_type->type; 6251 r->code = icmp_type->code; 6252 6253 if ((keep_state == PF_STATE_MODULATE || 6254 keep_state == PF_STATE_SYNPROXY) && 6255 r->proto && r->proto != IPPROTO_TCP) 6256 r->keep_state = PF_STATE_NORMAL; 6257 else 6258 r->keep_state = keep_state; 6259 6260 if (r->proto && r->proto != IPPROTO_TCP) { 6261 r->flags = 0; 6262 r->flagset = 0; 6263 } else { 6264 r->flags = flags; 6265 r->flagset = flagset; 6266 } 6267 if (icmp_type->proto && r->proto != icmp_type->proto) { 6268 yyerror("icmp-type mismatch"); 6269 error++; 6270 } 6271 6272 if (src_os && src_os->os) { 6273 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 6274 if ((pf->opts & PF_OPT_VERBOSE2) && 6275 r->os_fingerprint == PF_OSFP_NOMATCH) 6276 fprintf(stderr, 6277 "warning: unknown '%s' OS fingerprint\n", 6278 src_os->os); 6279 } else { 6280 r->os_fingerprint = PF_OSFP_ANY; 6281 } 6282 6283 TAILQ_INIT(&r->rdr.list); 6284 for (h = rdr_hosts; h != NULL; h = h->next) { 6285 pa = calloc(1, sizeof(struct pf_pooladdr)); 6286 if (pa == NULL) 6287 err(1, "expand_rule: calloc"); 6288 pa->addr = h->addr; 6289 if (h->ifname != NULL) { 6290 if (strlcpy(pa->ifname, h->ifname, 6291 sizeof(pa->ifname)) >= 6292 sizeof(pa->ifname)) 6293 errx(1, "expand_rule: strlcpy"); 6294 } else 6295 pa->ifname[0] = 0; 6296 TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries); 6297 } 6298 TAILQ_INIT(&r->nat.list); 6299 for (h = nat_hosts; h != NULL; h = h->next) { 6300 pa = calloc(1, sizeof(struct pf_pooladdr)); 6301 if (pa == NULL) 6302 err(1, "expand_rule: calloc"); 6303 pa->addr = h->addr; 6304 if (h->ifname != NULL) { 6305 if (strlcpy(pa->ifname, h->ifname, 6306 sizeof(pa->ifname)) >= 6307 sizeof(pa->ifname)) 6308 errx(1, "expand_rule: strlcpy"); 6309 } else 6310 pa->ifname[0] = 0; 6311 TAILQ_INSERT_TAIL(&r->nat.list, pa, entries); 6312 } 6313 6314 r->nat.proxy_port[0] = PF_NAT_PROXY_PORT_LOW; 6315 r->nat.proxy_port[1] = PF_NAT_PROXY_PORT_HIGH; 6316 6317 if (rule_consistent(r, anchor_call[0]) < 0 || error) 6318 yyerror("skipping rule due to errors"); 6319 else { 6320 r->nr = pf->astack[pf->asd]->match++; 6321 pfctl_append_rule(pf, r, anchor_call); 6322 added++; 6323 } 6324 6325 if (osrch && src_host->addr.type == PF_ADDR_DYNIFTL) { 6326 free(src_host); 6327 src_host = osrch; 6328 } 6329 if (odsth && dst_host->addr.type == PF_ADDR_DYNIFTL) { 6330 free(dst_host); 6331 dst_host = odsth; 6332 } 6333 6334 )))))))))); 6335 6336 FREE_LIST(struct node_if, interfaces); 6337 FREE_LIST(struct node_proto, protos); 6338 FREE_LIST(struct node_host, src_hosts); 6339 FREE_LIST(struct node_port, src_ports); 6340 FREE_LIST(struct node_os, src_oses); 6341 FREE_LIST(struct node_host, dst_hosts); 6342 FREE_LIST(struct node_port, dst_ports); 6343 FREE_LIST(struct node_uid, uids); 6344 FREE_LIST(struct node_gid, gids); 6345 FREE_LIST(struct node_icmp, icmp_types); 6346 FREE_LIST(struct node_host, rdr_hosts); 6347 FREE_LIST(struct node_host, nat_hosts); 6348 6349 if (!added) 6350 yyerror("rule expands to no valid combination"); 6351 } 6352 6353 int 6354 expand_skip_interface(struct node_if *interfaces) 6355 { 6356 int errs = 0; 6357 6358 if (!interfaces || (!interfaces->next && !interfaces->not && 6359 !strcmp(interfaces->ifname, "none"))) { 6360 if (pf->opts & PF_OPT_VERBOSE) 6361 printf("set skip on none\n"); 6362 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0); 6363 return (errs); 6364 } 6365 6366 if (pf->opts & PF_OPT_VERBOSE) 6367 printf("set skip on {"); 6368 LOOP_THROUGH(struct node_if, interface, interfaces, 6369 if (pf->opts & PF_OPT_VERBOSE) 6370 printf(" %s", interface->ifname); 6371 if (interface->not) { 6372 yyerror("skip on ! <interface> is not supported"); 6373 errs++; 6374 } else 6375 errs += pfctl_set_interface_flags(pf, 6376 interface->ifname, PFI_IFLAG_SKIP, 1); 6377 ); 6378 if (pf->opts & PF_OPT_VERBOSE) 6379 printf(" }\n"); 6380 6381 FREE_LIST(struct node_if, interfaces); 6382 6383 if (errs) 6384 return (1); 6385 else 6386 return (0); 6387 } 6388 6389 void 6390 freehostlist(struct node_host *h) 6391 { 6392 FREE_LIST(struct node_host, h); 6393 } 6394 6395 #undef FREE_LIST 6396 #undef LOOP_THROUGH 6397 6398 int 6399 check_rulestate(int desired_state) 6400 { 6401 if (require_order && (rulestate > desired_state)) { 6402 yyerror("Rules must be in order: options, ethernet, " 6403 "normalization, queueing, translation, filtering"); 6404 return (1); 6405 } 6406 rulestate = desired_state; 6407 return (0); 6408 } 6409 6410 int 6411 kw_cmp(const void *k, const void *e) 6412 { 6413 return (strcmp(k, ((const struct keywords *)e)->k_name)); 6414 } 6415 6416 int 6417 lookup(char *s) 6418 { 6419 /* this has to be sorted always */ 6420 static const struct keywords keywords[] = { 6421 { "af-to", AFTO}, 6422 { "all", ALL}, 6423 { "allow-opts", ALLOWOPTS}, 6424 { "altq", ALTQ}, 6425 { "anchor", ANCHOR}, 6426 { "antispoof", ANTISPOOF}, 6427 { "any", ANY}, 6428 { "bandwidth", BANDWIDTH}, 6429 { "binat", BINAT}, 6430 { "binat-anchor", BINATANCHOR}, 6431 { "bitmask", BITMASK}, 6432 { "block", BLOCK}, 6433 { "block-policy", BLOCKPOLICY}, 6434 { "bridge-to", BRIDGE_TO}, 6435 { "buckets", BUCKETS}, 6436 { "cbq", CBQ}, 6437 { "code", CODE}, 6438 { "codelq", CODEL}, 6439 { "debug", DEBUG}, 6440 { "divert-reply", DIVERTREPLY}, 6441 { "divert-to", DIVERTTO}, 6442 { "dnpipe", DNPIPE}, 6443 { "dnqueue", DNQUEUE}, 6444 { "drop", DROP}, 6445 { "dup-to", DUPTO}, 6446 { "endpoint-independent", ENDPI}, 6447 { "ether", ETHER}, 6448 { "fail-policy", FAILPOLICY}, 6449 { "fairq", FAIRQ}, 6450 { "fastroute", FASTROUTE}, 6451 { "file", FILENAME}, 6452 { "fingerprints", FINGERPRINTS}, 6453 { "flags", FLAGS}, 6454 { "floating", FLOATING}, 6455 { "flush", FLUSH}, 6456 { "for", FOR}, 6457 { "fragment", FRAGMENT}, 6458 { "from", FROM}, 6459 { "global", GLOBAL}, 6460 { "group", GROUP}, 6461 { "hfsc", HFSC}, 6462 { "hogs", HOGS}, 6463 { "hostid", HOSTID}, 6464 { "icmp-type", ICMPTYPE}, 6465 { "icmp6-type", ICMP6TYPE}, 6466 { "if-bound", IFBOUND}, 6467 { "in", IN}, 6468 { "include", INCLUDE}, 6469 { "inet", INET}, 6470 { "inet6", INET6}, 6471 { "interval", INTERVAL}, 6472 { "keep", KEEP}, 6473 { "keepcounters", KEEPCOUNTERS}, 6474 { "l3", L3}, 6475 { "label", LABEL}, 6476 { "limit", LIMIT}, 6477 { "linkshare", LINKSHARE}, 6478 { "load", LOAD}, 6479 { "log", LOG}, 6480 { "loginterface", LOGINTERFACE}, 6481 { "map-e-portset", MAPEPORTSET}, 6482 { "match", MATCH}, 6483 { "matches", MATCHES}, 6484 { "max", MAXIMUM}, 6485 { "max-mss", MAXMSS}, 6486 { "max-src-conn", MAXSRCCONN}, 6487 { "max-src-conn-rate", MAXSRCCONNRATE}, 6488 { "max-src-nodes", MAXSRCNODES}, 6489 { "max-src-states", MAXSRCSTATES}, 6490 { "min-ttl", MINTTL}, 6491 { "modulate", MODULATE}, 6492 { "nat", NAT}, 6493 { "nat-anchor", NATANCHOR}, 6494 { "no", NO}, 6495 { "no-df", NODF}, 6496 { "no-route", NOROUTE}, 6497 { "no-sync", NOSYNC}, 6498 { "on", ON}, 6499 { "optimization", OPTIMIZATION}, 6500 { "os", OS}, 6501 { "out", OUT}, 6502 { "overload", OVERLOAD}, 6503 { "pass", PASS}, 6504 { "pflow", PFLOW}, 6505 { "port", PORT}, 6506 { "prio", PRIO}, 6507 { "priority", PRIORITY}, 6508 { "priq", PRIQ}, 6509 { "probability", PROBABILITY}, 6510 { "proto", PROTO}, 6511 { "qlimit", QLIMIT}, 6512 { "queue", QUEUE}, 6513 { "quick", QUICK}, 6514 { "random", RANDOM}, 6515 { "random-id", RANDOMID}, 6516 { "rdr", RDR}, 6517 { "rdr-anchor", RDRANCHOR}, 6518 { "realtime", REALTIME}, 6519 { "reassemble", REASSEMBLE}, 6520 { "received-on", RECEIVEDON}, 6521 { "reply-to", REPLYTO}, 6522 { "require-order", REQUIREORDER}, 6523 { "return", RETURN}, 6524 { "return-icmp", RETURNICMP}, 6525 { "return-icmp6", RETURNICMP6}, 6526 { "return-rst", RETURNRST}, 6527 { "ridentifier", RIDENTIFIER}, 6528 { "round-robin", ROUNDROBIN}, 6529 { "route", ROUTE}, 6530 { "route-to", ROUTETO}, 6531 { "rtable", RTABLE}, 6532 { "rule", RULE}, 6533 { "ruleset-optimization", RULESET_OPTIMIZATION}, 6534 { "scrub", SCRUB}, 6535 { "set", SET}, 6536 { "set-tos", SETTOS}, 6537 { "skip", SKIP}, 6538 { "sloppy", SLOPPY}, 6539 { "source-hash", SOURCEHASH}, 6540 { "source-track", SOURCETRACK}, 6541 { "state", STATE}, 6542 { "state-defaults", STATEDEFAULTS}, 6543 { "state-policy", STATEPOLICY}, 6544 { "static-port", STATICPORT}, 6545 { "sticky-address", STICKYADDRESS}, 6546 { "syncookies", SYNCOOKIES}, 6547 { "synproxy", SYNPROXY}, 6548 { "table", TABLE}, 6549 { "tag", TAG}, 6550 { "tagged", TAGGED}, 6551 { "target", TARGET}, 6552 { "tbrsize", TBRSIZE}, 6553 { "timeout", TIMEOUT}, 6554 { "to", TO}, 6555 { "tos", TOS}, 6556 { "ttl", TTL}, 6557 { "upperlimit", UPPERLIMIT}, 6558 { "urpf-failed", URPFFAILED}, 6559 { "user", USER}, 6560 }; 6561 const struct keywords *p; 6562 6563 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 6564 sizeof(keywords[0]), kw_cmp); 6565 6566 if (p) { 6567 if (debug > 1) 6568 fprintf(stderr, "%s: %d\n", s, p->k_val); 6569 return (p->k_val); 6570 } else { 6571 if (debug > 1) 6572 fprintf(stderr, "string: %s\n", s); 6573 return (STRING); 6574 } 6575 } 6576 6577 #define MAXPUSHBACK 128 6578 6579 static char *parsebuf; 6580 static int parseindex; 6581 static char pushback_buffer[MAXPUSHBACK]; 6582 static int pushback_index = 0; 6583 6584 int 6585 lgetc(int quotec) 6586 { 6587 int c, next; 6588 6589 if (parsebuf) { 6590 /* Read character from the parsebuffer instead of input. */ 6591 if (parseindex >= 0) { 6592 c = parsebuf[parseindex++]; 6593 if (c != '\0') 6594 return (c); 6595 parsebuf = NULL; 6596 } else 6597 parseindex++; 6598 } 6599 6600 if (pushback_index) 6601 return (pushback_buffer[--pushback_index]); 6602 6603 if (quotec) { 6604 if ((c = getc(file->stream)) == EOF) { 6605 yyerror("reached end of file while parsing quoted string"); 6606 if (popfile() == EOF) 6607 return (EOF); 6608 return (quotec); 6609 } 6610 return (c); 6611 } 6612 6613 while ((c = getc(file->stream)) == '\\') { 6614 next = getc(file->stream); 6615 if (next != '\n') { 6616 c = next; 6617 break; 6618 } 6619 yylval.lineno = file->lineno; 6620 file->lineno++; 6621 } 6622 6623 while (c == EOF) { 6624 if (popfile() == EOF) 6625 return (EOF); 6626 c = getc(file->stream); 6627 } 6628 return (c); 6629 } 6630 6631 int 6632 lungetc(int c) 6633 { 6634 if (c == EOF) 6635 return (EOF); 6636 if (parsebuf) { 6637 parseindex--; 6638 if (parseindex >= 0) 6639 return (c); 6640 } 6641 if (pushback_index < MAXPUSHBACK-1) 6642 return (pushback_buffer[pushback_index++] = c); 6643 else 6644 return (EOF); 6645 } 6646 6647 int 6648 findeol(void) 6649 { 6650 int c; 6651 6652 parsebuf = NULL; 6653 6654 /* skip to either EOF or the first real EOL */ 6655 while (1) { 6656 if (pushback_index) 6657 c = pushback_buffer[--pushback_index]; 6658 else 6659 c = lgetc(0); 6660 if (c == '\n') { 6661 file->lineno++; 6662 break; 6663 } 6664 if (c == EOF) 6665 break; 6666 } 6667 return (ERROR); 6668 } 6669 6670 int 6671 yylex(void) 6672 { 6673 char buf[8096]; 6674 char *p, *val; 6675 int quotec, next, c; 6676 int token; 6677 6678 top: 6679 p = buf; 6680 while ((c = lgetc(0)) == ' ' || c == '\t') 6681 ; /* nothing */ 6682 6683 yylval.lineno = file->lineno; 6684 if (c == '#') 6685 while ((c = lgetc(0)) != '\n' && c != EOF) 6686 ; /* nothing */ 6687 if (c == '$' && parsebuf == NULL) { 6688 while (1) { 6689 if ((c = lgetc(0)) == EOF) 6690 return (0); 6691 6692 if (p + 1 >= buf + sizeof(buf) - 1) { 6693 yyerror("string too long"); 6694 return (findeol()); 6695 } 6696 if (isalnum(c) || c == '_') { 6697 *p++ = (char)c; 6698 continue; 6699 } 6700 *p = '\0'; 6701 lungetc(c); 6702 break; 6703 } 6704 val = symget(buf); 6705 if (val == NULL) { 6706 yyerror("macro '%s' not defined", buf); 6707 return (findeol()); 6708 } 6709 parsebuf = val; 6710 parseindex = 0; 6711 goto top; 6712 } 6713 6714 switch (c) { 6715 case '\'': 6716 case '"': 6717 quotec = c; 6718 while (1) { 6719 if ((c = lgetc(quotec)) == EOF) 6720 return (0); 6721 if (c == '\n') { 6722 file->lineno++; 6723 continue; 6724 } else if (c == '\\') { 6725 if ((next = lgetc(quotec)) == EOF) 6726 return (0); 6727 if (next == quotec || c == ' ' || c == '\t') 6728 c = next; 6729 else if (next == '\n') { 6730 file->lineno++; 6731 continue; 6732 } 6733 else 6734 lungetc(next); 6735 } else if (c == quotec) { 6736 *p = '\0'; 6737 break; 6738 } 6739 if (p + 1 >= buf + sizeof(buf) - 1) { 6740 yyerror("string too long"); 6741 return (findeol()); 6742 } 6743 *p++ = (char)c; 6744 } 6745 yylval.v.string = strdup(buf); 6746 if (yylval.v.string == NULL) 6747 err(1, "yylex: strdup"); 6748 return (STRING); 6749 case '!': 6750 next = lgetc(0); 6751 if (next == '=') 6752 return (NE); 6753 lungetc(next); 6754 break; 6755 case '<': 6756 next = lgetc(0); 6757 if (next == '>') { 6758 yylval.v.i = PF_OP_XRG; 6759 return (PORTBINARY); 6760 } else if (next == '=') 6761 return (LE); 6762 lungetc(next); 6763 break; 6764 case '>': 6765 next = lgetc(0); 6766 if (next == '<') { 6767 yylval.v.i = PF_OP_IRG; 6768 return (PORTBINARY); 6769 } else if (next == '=') 6770 return (GE); 6771 lungetc(next); 6772 break; 6773 case '-': 6774 next = lgetc(0); 6775 if (next == '>') 6776 return (ARROW); 6777 lungetc(next); 6778 break; 6779 } 6780 6781 #define allowed_to_end_number(x) \ 6782 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 6783 6784 if (c == '-' || isdigit(c)) { 6785 do { 6786 *p++ = c; 6787 if ((unsigned)(p-buf) >= sizeof(buf)) { 6788 yyerror("string too long"); 6789 return (findeol()); 6790 } 6791 } while ((c = lgetc(0)) != EOF && isdigit(c)); 6792 lungetc(c); 6793 if (p == buf + 1 && buf[0] == '-') 6794 goto nodigits; 6795 if (c == EOF || allowed_to_end_number(c)) { 6796 const char *errstr = NULL; 6797 6798 *p = '\0'; 6799 yylval.v.number = strtonum(buf, LLONG_MIN, 6800 LLONG_MAX, &errstr); 6801 if (errstr) { 6802 yyerror("\"%s\" invalid number: %s", 6803 buf, errstr); 6804 return (findeol()); 6805 } 6806 return (NUMBER); 6807 } else { 6808 nodigits: 6809 while (p > buf + 1) 6810 lungetc(*--p); 6811 c = *--p; 6812 if (c == '-') 6813 return (c); 6814 } 6815 } 6816 6817 #define allowed_in_string(x) \ 6818 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 6819 x != '{' && x != '}' && x != '<' && x != '>' && \ 6820 x != '!' && x != '=' && x != '/' && x != '#' && \ 6821 x != ',')) 6822 6823 if (isalnum(c) || c == ':' || c == '_') { 6824 do { 6825 *p++ = c; 6826 if ((unsigned)(p-buf) >= sizeof(buf)) { 6827 yyerror("string too long"); 6828 return (findeol()); 6829 } 6830 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 6831 lungetc(c); 6832 *p = '\0'; 6833 if ((token = lookup(buf)) == STRING) 6834 if ((yylval.v.string = strdup(buf)) == NULL) 6835 err(1, "yylex: strdup"); 6836 return (token); 6837 } 6838 if (c == '\n') { 6839 yylval.lineno = file->lineno; 6840 file->lineno++; 6841 } 6842 if (c == EOF) 6843 return (0); 6844 return (c); 6845 } 6846 6847 int 6848 check_file_secrecy(int fd, const char *fname) 6849 { 6850 struct stat st; 6851 6852 if (fstat(fd, &st)) { 6853 warn("cannot stat %s", fname); 6854 return (-1); 6855 } 6856 if (st.st_uid != 0 && st.st_uid != getuid()) { 6857 warnx("%s: owner not root or current user", fname); 6858 return (-1); 6859 } 6860 if (st.st_mode & (S_IRWXG | S_IRWXO)) { 6861 warnx("%s: group/world readable/writeable", fname); 6862 return (-1); 6863 } 6864 return (0); 6865 } 6866 6867 struct file * 6868 pushfile(const char *name, int secret) 6869 { 6870 struct file *nfile; 6871 6872 if ((nfile = calloc(1, sizeof(struct file))) == NULL || 6873 (nfile->name = strdup(name)) == NULL) { 6874 warn("malloc"); 6875 return (NULL); 6876 } 6877 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 6878 nfile->stream = stdin; 6879 free(nfile->name); 6880 if ((nfile->name = strdup("stdin")) == NULL) { 6881 warn("strdup"); 6882 free(nfile); 6883 return (NULL); 6884 } 6885 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 6886 warn("%s", nfile->name); 6887 free(nfile->name); 6888 free(nfile); 6889 return (NULL); 6890 } else if (secret && 6891 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 6892 fclose(nfile->stream); 6893 free(nfile->name); 6894 free(nfile); 6895 return (NULL); 6896 } 6897 nfile->lineno = 1; 6898 TAILQ_INSERT_TAIL(&files, nfile, entry); 6899 return (nfile); 6900 } 6901 6902 int 6903 popfile(void) 6904 { 6905 struct file *prev; 6906 6907 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 6908 prev->errors += file->errors; 6909 TAILQ_REMOVE(&files, file, entry); 6910 fclose(file->stream); 6911 free(file->name); 6912 free(file); 6913 file = prev; 6914 return (0); 6915 } 6916 return (EOF); 6917 } 6918 6919 int 6920 parse_config(char *filename, struct pfctl *xpf) 6921 { 6922 int errors = 0; 6923 struct sym *sym; 6924 6925 pf = xpf; 6926 errors = 0; 6927 rulestate = PFCTL_STATE_NONE; 6928 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 6929 returnicmp6default = 6930 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 6931 blockpolicy = PFRULE_DROP; 6932 failpolicy = PFRULE_DROP; 6933 require_order = 1; 6934 6935 if ((file = pushfile(filename, 0)) == NULL) { 6936 warn("cannot open the main config file!"); 6937 return (-1); 6938 } 6939 6940 yyparse(); 6941 errors = file->errors; 6942 popfile(); 6943 6944 /* Free macros and check which have not been used. */ 6945 while ((sym = TAILQ_FIRST(&symhead))) { 6946 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 6947 fprintf(stderr, "warning: macro '%s' not " 6948 "used\n", sym->nam); 6949 free(sym->nam); 6950 free(sym->val); 6951 TAILQ_REMOVE(&symhead, sym, entry); 6952 free(sym); 6953 } 6954 6955 return (errors ? -1 : 0); 6956 } 6957 6958 int 6959 symset(const char *nam, const char *val, int persist) 6960 { 6961 struct sym *sym; 6962 6963 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 6964 sym = TAILQ_NEXT(sym, entry)) 6965 ; /* nothing */ 6966 6967 if (sym != NULL) { 6968 if (sym->persist == 1) 6969 return (0); 6970 else { 6971 free(sym->nam); 6972 free(sym->val); 6973 TAILQ_REMOVE(&symhead, sym, entry); 6974 free(sym); 6975 } 6976 } 6977 if ((sym = calloc(1, sizeof(*sym))) == NULL) 6978 return (-1); 6979 6980 sym->nam = strdup(nam); 6981 if (sym->nam == NULL) { 6982 free(sym); 6983 return (-1); 6984 } 6985 sym->val = strdup(val); 6986 if (sym->val == NULL) { 6987 free(sym->nam); 6988 free(sym); 6989 return (-1); 6990 } 6991 sym->used = 0; 6992 sym->persist = persist; 6993 TAILQ_INSERT_TAIL(&symhead, sym, entry); 6994 return (0); 6995 } 6996 6997 int 6998 pfctl_cmdline_symset(char *s) 6999 { 7000 char *sym, *val; 7001 int ret; 7002 7003 if ((val = strrchr(s, '=')) == NULL) 7004 return (-1); 7005 7006 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL) 7007 err(1, "pfctl_cmdline_symset: malloc"); 7008 7009 strlcpy(sym, s, strlen(s) - strlen(val) + 1); 7010 7011 ret = symset(sym, val + 1, 1); 7012 free(sym); 7013 7014 return (ret); 7015 } 7016 7017 char * 7018 symget(const char *nam) 7019 { 7020 struct sym *sym; 7021 7022 TAILQ_FOREACH(sym, &symhead, entry) 7023 if (strcmp(nam, sym->nam) == 0) { 7024 sym->used = 1; 7025 return (sym->val); 7026 } 7027 return (NULL); 7028 } 7029 7030 void 7031 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst) 7032 { 7033 int i; 7034 struct pfctl_rule *r; 7035 7036 for (i = 0; i < PF_RULESET_MAX; ++i) { 7037 while ((r = TAILQ_FIRST(src->rules[i].active.ptr)) 7038 != NULL) { 7039 TAILQ_REMOVE(src->rules[i].active.ptr, r, entries); 7040 TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries); 7041 dst->anchor->match++; 7042 } 7043 src->anchor->match = 0; 7044 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr)) 7045 != NULL) { 7046 TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries); 7047 TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr, 7048 r, entries); 7049 } 7050 } 7051 } 7052 7053 void 7054 mv_eth_rules(struct pfctl_eth_ruleset *src, struct pfctl_eth_ruleset *dst) 7055 { 7056 struct pfctl_eth_rule *r; 7057 7058 while ((r = TAILQ_FIRST(&src->rules)) != NULL) { 7059 TAILQ_REMOVE(&src->rules, r, entries); 7060 TAILQ_INSERT_TAIL(&dst->rules, r, entries); 7061 dst->anchor->match++; 7062 } 7063 src->anchor->match = 0; 7064 } 7065 7066 void 7067 decide_address_family(struct node_host *n, sa_family_t *af) 7068 { 7069 if (*af != 0 || n == NULL) 7070 return; 7071 *af = n->af; 7072 while ((n = n->next) != NULL) { 7073 if (n->af != *af) { 7074 *af = 0; 7075 return; 7076 } 7077 } 7078 } 7079 7080 void 7081 remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 7082 { 7083 struct node_host *n = *nh, *prev = NULL; 7084 7085 while (n != NULL) { 7086 if (*af && n->af && n->af != *af) { 7087 /* unlink and free n */ 7088 struct node_host *next = n->next; 7089 7090 /* adjust tail pointer */ 7091 if (n == (*nh)->tail) 7092 (*nh)->tail = prev; 7093 /* adjust previous node's next pointer */ 7094 if (prev == NULL) 7095 *nh = next; 7096 else 7097 prev->next = next; 7098 /* free node */ 7099 if (n->ifname != NULL) 7100 free(n->ifname); 7101 free(n); 7102 n = next; 7103 } else { 7104 if (n->af && !*af) 7105 *af = n->af; 7106 prev = n; 7107 n = n->next; 7108 } 7109 } 7110 } 7111 7112 int 7113 invalid_redirect(struct node_host *nh, sa_family_t af) 7114 { 7115 if (!af) { 7116 struct node_host *n; 7117 7118 /* tables and dyniftl are ok without an address family */ 7119 for (n = nh; n != NULL; n = n->next) { 7120 if (n->addr.type != PF_ADDR_TABLE && 7121 n->addr.type != PF_ADDR_DYNIFTL) { 7122 yyerror("address family not given and " 7123 "translation address expands to multiple " 7124 "address families"); 7125 return (1); 7126 } 7127 } 7128 } 7129 if (nh == NULL) { 7130 yyerror("no translation address with matching address family " 7131 "found."); 7132 return (1); 7133 } 7134 return (0); 7135 } 7136 7137 int 7138 atoul(char *s, u_long *ulvalp) 7139 { 7140 u_long ulval; 7141 char *ep; 7142 7143 errno = 0; 7144 ulval = strtoul(s, &ep, 0); 7145 if (s[0] == '\0' || *ep != '\0') 7146 return (-1); 7147 if (errno == ERANGE && ulval == ULONG_MAX) 7148 return (-1); 7149 *ulvalp = ulval; 7150 return (0); 7151 } 7152 7153 int 7154 getservice(char *n) 7155 { 7156 struct servent *s; 7157 u_long ulval; 7158 7159 if (atoul(n, &ulval) == 0) { 7160 if (ulval > 65535) { 7161 yyerror("illegal port value %lu", ulval); 7162 return (-1); 7163 } 7164 return (htons(ulval)); 7165 } else { 7166 s = getservbyname(n, "tcp"); 7167 if (s == NULL) 7168 s = getservbyname(n, "udp"); 7169 if (s == NULL) 7170 s = getservbyname(n, "sctp"); 7171 if (s == NULL) { 7172 yyerror("unknown port %s", n); 7173 return (-1); 7174 } 7175 return (s->s_port); 7176 } 7177 } 7178 7179 int 7180 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 7181 { 7182 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 7183 if (s[i] == NULL) 7184 return (0); 7185 7186 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 7187 sizeof(r->label[0])) { 7188 yyerror("rule label too long (max %d chars)", 7189 sizeof(r->label[0])-1); 7190 return (-1); 7191 } 7192 } 7193 return (0); 7194 } 7195 7196 int 7197 eth_rule_label(struct pfctl_eth_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 7198 { 7199 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 7200 if (s[i] == NULL) 7201 return (0); 7202 7203 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 7204 sizeof(r->label[0])) { 7205 yyerror("rule label too long (max %d chars)", 7206 sizeof(r->label[0])-1); 7207 return (-1); 7208 } 7209 } 7210 return (0); 7211 } 7212 7213 u_int16_t 7214 parseicmpspec(char *w, sa_family_t af) 7215 { 7216 const struct icmpcodeent *p; 7217 u_long ulval; 7218 u_int8_t icmptype; 7219 7220 if (af == AF_INET) 7221 icmptype = returnicmpdefault >> 8; 7222 else 7223 icmptype = returnicmp6default >> 8; 7224 7225 if (atoul(w, &ulval) == -1) { 7226 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 7227 yyerror("unknown icmp code %s", w); 7228 return (0); 7229 } 7230 ulval = p->code; 7231 } 7232 if (ulval > 255) { 7233 yyerror("invalid icmp code %lu", ulval); 7234 return (0); 7235 } 7236 return (icmptype << 8 | ulval); 7237 } 7238 7239 int 7240 parseport(char *port, struct range *r, int extensions) 7241 { 7242 char *p = strchr(port, ':'); 7243 7244 if (p == NULL) { 7245 if ((r->a = getservice(port)) == -1) 7246 return (-1); 7247 r->b = 0; 7248 r->t = PF_OP_NONE; 7249 return (0); 7250 } 7251 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) { 7252 *p = 0; 7253 if ((r->a = getservice(port)) == -1) 7254 return (-1); 7255 r->b = 0; 7256 r->t = PF_OP_IRG; 7257 return (0); 7258 } 7259 if ((extensions & PPORT_RANGE)) { 7260 *p++ = 0; 7261 if ((r->a = getservice(port)) == -1 || 7262 (r->b = getservice(p)) == -1) 7263 return (-1); 7264 if (r->a == r->b) { 7265 r->b = 0; 7266 r->t = PF_OP_NONE; 7267 } else 7268 r->t = PF_OP_RRG; 7269 return (0); 7270 } 7271 return (-1); 7272 } 7273 7274 int 7275 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans) 7276 { 7277 struct loadanchors *la; 7278 7279 TAILQ_FOREACH(la, &loadanchorshead, entries) { 7280 if (pf->opts & PF_OPT_VERBOSE) 7281 fprintf(stderr, "\nLoading anchor %s from %s\n", 7282 la->anchorname, la->filename); 7283 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize, 7284 la->anchorname, trans) == -1) 7285 return (-1); 7286 } 7287 7288 return (0); 7289 } 7290 7291 int 7292 kw_casecmp(const void *k, const void *e) 7293 { 7294 return (strcasecmp(k, ((const struct keywords *)e)->k_name)); 7295 } 7296 7297 int 7298 map_tos(char *s, int *val) 7299 { 7300 /* DiffServ Codepoints and other TOS mappings */ 7301 const struct keywords toswords[] = { 7302 { "af11", IPTOS_DSCP_AF11 }, 7303 { "af12", IPTOS_DSCP_AF12 }, 7304 { "af13", IPTOS_DSCP_AF13 }, 7305 { "af21", IPTOS_DSCP_AF21 }, 7306 { "af22", IPTOS_DSCP_AF22 }, 7307 { "af23", IPTOS_DSCP_AF23 }, 7308 { "af31", IPTOS_DSCP_AF31 }, 7309 { "af32", IPTOS_DSCP_AF32 }, 7310 { "af33", IPTOS_DSCP_AF33 }, 7311 { "af41", IPTOS_DSCP_AF41 }, 7312 { "af42", IPTOS_DSCP_AF42 }, 7313 { "af43", IPTOS_DSCP_AF43 }, 7314 { "critical", IPTOS_PREC_CRITIC_ECP }, 7315 { "cs0", IPTOS_DSCP_CS0 }, 7316 { "cs1", IPTOS_DSCP_CS1 }, 7317 { "cs2", IPTOS_DSCP_CS2 }, 7318 { "cs3", IPTOS_DSCP_CS3 }, 7319 { "cs4", IPTOS_DSCP_CS4 }, 7320 { "cs5", IPTOS_DSCP_CS5 }, 7321 { "cs6", IPTOS_DSCP_CS6 }, 7322 { "cs7", IPTOS_DSCP_CS7 }, 7323 { "ef", IPTOS_DSCP_EF }, 7324 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL }, 7325 { "lowdelay", IPTOS_LOWDELAY }, 7326 { "netcontrol", IPTOS_PREC_NETCONTROL }, 7327 { "reliability", IPTOS_RELIABILITY }, 7328 { "throughput", IPTOS_THROUGHPUT }, 7329 { "va", IPTOS_DSCP_VA } 7330 }; 7331 const struct keywords *p; 7332 7333 p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]), 7334 sizeof(toswords[0]), kw_casecmp); 7335 7336 if (p) { 7337 *val = p->k_val; 7338 return (1); 7339 } 7340 return (0); 7341 } 7342 7343 int 7344 rt_tableid_max(void) 7345 { 7346 #ifdef __FreeBSD__ 7347 int fibs; 7348 size_t l = sizeof(fibs); 7349 7350 if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1) 7351 fibs = 16; /* XXX RT_MAXFIBS, at least limit it some. */ 7352 /* 7353 * As the OpenBSD code only compares > and not >= we need to adjust 7354 * here given we only accept values of 0..n and want to avoid #ifdefs 7355 * in the grammar. 7356 */ 7357 return (fibs - 1); 7358 #else 7359 return (RT_TABLEID_MAX); 7360 #endif 7361 } 7362 7363 struct node_mac* 7364 node_mac_from_string(const char *str) 7365 { 7366 struct node_mac *m; 7367 7368 m = calloc(1, sizeof(struct node_mac)); 7369 if (m == NULL) 7370 err(1, "mac: calloc"); 7371 7372 if (sscanf(str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 7373 &m->mac[0], &m->mac[1], &m->mac[2], &m->mac[3], &m->mac[4], 7374 &m->mac[5]) != 6) { 7375 free(m); 7376 yyerror("invalid MAC address"); 7377 return (NULL); 7378 } 7379 7380 memset(m->mask, 0xff, ETHER_ADDR_LEN); 7381 m->isset = true; 7382 m->next = NULL; 7383 m->tail = m; 7384 7385 return (m); 7386 } 7387 7388 struct node_mac* 7389 node_mac_from_string_masklen(const char *str, int masklen) 7390 { 7391 struct node_mac *m; 7392 7393 if (masklen < 0 || masklen > (ETHER_ADDR_LEN * 8)) { 7394 yyerror("invalid MAC mask length"); 7395 return (NULL); 7396 } 7397 7398 m = node_mac_from_string(str); 7399 if (m == NULL) 7400 return (NULL); 7401 7402 memset(m->mask, 0, ETHER_ADDR_LEN); 7403 for (int i = 0; i < masklen; i++) 7404 m->mask[i / 8] |= 1 << (i % 8); 7405 7406 return (m); 7407 } 7408 7409 struct node_mac* 7410 node_mac_from_string_mask(const char *str, const char *mask) 7411 { 7412 struct node_mac *m; 7413 7414 m = node_mac_from_string(str); 7415 if (m == NULL) 7416 return (NULL); 7417 7418 if (sscanf(mask, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 7419 &m->mask[0], &m->mask[1], &m->mask[2], &m->mask[3], &m->mask[4], 7420 &m->mask[5]) != 6) { 7421 free(m); 7422 yyerror("invalid MAC mask"); 7423 return (NULL); 7424 } 7425 7426 return (m); 7427 } 7428