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, PF_STATE_OPT_ALLOW_RELATED }; 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 }; 230 231 static struct pool_opts { 232 int marker; 233 #define POM_TYPE 0x01 234 #define POM_STICKYADDRESS 0x02 235 #define POM_ENDPI 0x04 236 u_int8_t opts; 237 int type; 238 int staticport; 239 struct pf_poolhashkey *key; 240 struct pf_mape_portset mape; 241 } pool_opts; 242 243 struct redirspec { 244 struct node_host *host; 245 struct range rport; 246 struct pool_opts pool_opts; 247 int af; 248 }; 249 250 static struct filter_opts { 251 int marker; 252 #define FOM_FLAGS 0x0001 253 #define FOM_ICMP 0x0002 254 #define FOM_TOS 0x0004 255 #define FOM_KEEP 0x0008 256 #define FOM_SRCTRACK 0x0010 257 #define FOM_MINTTL 0x0020 258 #define FOM_MAXMSS 0x0040 259 #define FOM_AFTO 0x0080 260 #define FOM_SETTOS 0x0100 261 #define FOM_SCRUB_TCP 0x0200 262 #define FOM_SETPRIO 0x0400 263 #define FOM_ONCE 0x1000 /* not yet implemmented */ 264 #define FOM_PRIO 0x2000 265 #define FOM_SETDELAY 0x4000 266 #define FOM_FRAGCACHE 0x8000 /* does not exist in OpenBSD */ 267 struct node_uid *uid; 268 struct node_gid *gid; 269 struct node_if *rcv; 270 struct { 271 u_int8_t b1; 272 u_int8_t b2; 273 u_int16_t w; 274 u_int16_t w2; 275 } flags; 276 struct node_icmp *icmpspec; 277 u_int32_t tos; 278 u_int32_t prob; 279 u_int32_t ridentifier; 280 struct { 281 int action; 282 struct node_state_opt *options; 283 } keep; 284 int fragment; 285 int allowopts; 286 char *label[PF_RULE_MAX_LABEL_COUNT]; 287 int labelcount; 288 struct node_qassign queues; 289 char *tag; 290 char *match_tag; 291 u_int8_t match_tag_not; 292 u_int16_t dnpipe; 293 u_int16_t dnrpipe; 294 u_int32_t free_flags; 295 u_int rtableid; 296 u_int8_t prio; 297 u_int8_t set_prio[2]; 298 struct { 299 struct node_host *addr; 300 u_int16_t port; 301 } divert; 302 struct redirspec *nat; 303 struct redirspec *rdr; 304 /* new-style scrub opts */ 305 int nodf; 306 int minttl; 307 int settos; 308 int randomid; 309 int max_mss; 310 } filter_opts; 311 312 static struct antispoof_opts { 313 char *label[PF_RULE_MAX_LABEL_COUNT]; 314 int labelcount; 315 u_int32_t ridentifier; 316 u_int rtableid; 317 } antispoof_opts; 318 319 static struct scrub_opts { 320 int marker; 321 int nodf; 322 int minttl; 323 int maxmss; 324 int settos; 325 int fragcache; 326 int randomid; 327 int reassemble_tcp; 328 char *match_tag; 329 u_int8_t match_tag_not; 330 u_int rtableid; 331 } scrub_opts; 332 333 static struct queue_opts { 334 int marker; 335 #define QOM_BWSPEC 0x01 336 #define QOM_SCHEDULER 0x02 337 #define QOM_PRIORITY 0x04 338 #define QOM_TBRSIZE 0x08 339 #define QOM_QLIMIT 0x10 340 struct node_queue_bw queue_bwspec; 341 struct node_queue_opt scheduler; 342 int priority; 343 unsigned int tbrsize; 344 int qlimit; 345 } queue_opts; 346 347 static struct table_opts { 348 int flags; 349 int init_addr; 350 struct node_tinithead init_nodes; 351 } table_opts; 352 353 static struct codel_opts codel_opts; 354 static struct node_hfsc_opts hfsc_opts; 355 static struct node_fairq_opts fairq_opts; 356 static struct node_state_opt *keep_state_defaults = NULL; 357 static struct pfctl_watermarks syncookie_opts; 358 359 int disallow_table(struct node_host *, const char *); 360 int disallow_urpf_failed(struct node_host *, const char *); 361 int disallow_alias(struct node_host *, const char *); 362 int rule_consistent(struct pfctl_rule *, int); 363 int filter_consistent(struct pfctl_rule *, int); 364 int nat_consistent(struct pfctl_rule *); 365 int rdr_consistent(struct pfctl_rule *); 366 int process_tabledef(char *, struct table_opts *); 367 void expand_label_str(char *, size_t, const char *, const char *); 368 void expand_label_if(const char *, char *, size_t, const char *); 369 void expand_label_addr(const char *, char *, size_t, sa_family_t, 370 struct pf_rule_addr *); 371 void expand_label_port(const char *, char *, size_t, 372 struct pf_rule_addr *); 373 void expand_label_proto(const char *, char *, size_t, u_int8_t); 374 void expand_label_nr(const char *, char *, size_t, 375 struct pfctl_rule *); 376 void expand_eth_rule(struct pfctl_eth_rule *, 377 struct node_if *, struct node_etherproto *, 378 struct node_mac *, struct node_mac *, 379 struct node_host *, struct node_host *, const char *, 380 const char *); 381 int apply_rdr_ports(struct pfctl_rule *r, struct pfctl_pool *, struct redirspec *); 382 int apply_nat_ports(struct pfctl_pool *, struct redirspec *); 383 int apply_redirspec(struct pfctl_pool *, struct redirspec *); 384 void expand_rule(struct pfctl_rule *, struct node_if *, 385 struct redirspec *, struct redirspec *, struct redirspec *, 386 struct node_proto *, struct node_os *, struct node_host *, 387 struct node_port *, struct node_host *, struct node_port *, 388 struct node_uid *, struct node_gid *, struct node_if *, 389 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 redirspec *redirspec; 465 u_int8_t rt; 466 } route; 467 struct redirspec *redirspec; 468 struct { 469 int action; 470 struct node_state_opt *options; 471 } keep_state; 472 struct { 473 u_int8_t log; 474 u_int8_t logif; 475 u_int8_t quick; 476 } logquick; 477 struct { 478 int neg; 479 char *name; 480 } tagged; 481 struct pf_poolhashkey *hashkey; 482 struct node_queue *queue; 483 struct node_queue_opt queue_options; 484 struct node_queue_bw queue_bwspec; 485 struct node_qassign qassign; 486 struct filter_opts filter_opts; 487 struct antispoof_opts antispoof_opts; 488 struct queue_opts queue_opts; 489 struct scrub_opts scrub_opts; 490 struct table_opts table_opts; 491 struct pool_opts pool_opts; 492 struct node_hfsc_opts hfsc_opts; 493 struct node_fairq_opts fairq_opts; 494 struct codel_opts codel_opts; 495 struct pfctl_watermarks *watermarks; 496 } v; 497 int lineno; 498 } YYSTYPE; 499 500 #define PPORT_RANGE 1 501 #define PPORT_STAR 2 502 int parseport(char *, struct range *r, int); 503 504 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \ 505 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \ 506 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1]))) 507 508 %} 509 510 %token PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS 511 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 512 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 513 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 514 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 515 %token REASSEMBLE ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 516 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY 517 %token RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID 518 %token ANTISPOOF FOR INCLUDE KEEPCOUNTERS SYNCOOKIES L3 MATCHES 519 %token ETHER 520 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET 521 %token ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME 522 %token UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL 523 %token DNPIPE DNQUEUE RIDENTIFIER 524 %token LOAD RULESET_OPTIMIZATION PRIO 525 %token STICKYADDRESS ENDPI MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE 526 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY PFLOW ALLOW_RELATED 527 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS 528 %token DIVERTTO DIVERTREPLY BRIDGE_TO RECEIVEDON NE LE GE AFTO 529 %token <v.string> STRING 530 %token <v.number> NUMBER 531 %token <v.i> PORTBINARY 532 %type <v.interface> interface if_list if_item_not if_item 533 %type <v.number> number icmptype icmp6type uid gid 534 %type <v.number> tos not yesno optnodf 535 %type <v.probability> probability 536 %type <v.i> no dir af fragcache optimizer syncookie_val 537 %type <v.i> sourcetrack flush unaryop statelock 538 %type <v.i> etherprotoval 539 %type <v.b> action nataction natpasslog scrubaction 540 %type <v.b> flags flag blockspec prio 541 %type <v.range> portplain portstar portrange 542 %type <v.hashkey> hashkey 543 %type <v.proto> proto proto_list proto_item 544 %type <v.number> protoval 545 %type <v.icmp> icmpspec 546 %type <v.icmp> icmp_list icmp_item 547 %type <v.icmp> icmp6_list icmp6_item 548 %type <v.number> reticmpspec reticmp6spec 549 %type <v.fromto> fromto l3fromto 550 %type <v.peer> ipportspec from to 551 %type <v.host> ipspec toipspec xhost host dynaddr host_list 552 %type <v.host> redir_host redir_host_list routespec 553 %type <v.host> route_host route_host_list 554 %type <v.os> os xos os_list 555 %type <v.port> portspec port_list port_item 556 %type <v.uid> uids uid_list uid_item 557 %type <v.gid> gids gid_list gid_item 558 %type <v.route> route 559 %type <v.redirspec> no_port_redirspec port_redirspec route_redirspec 560 %type <v.redirspec> binat_redirspec nat_redirspec 561 %type <v.string> label stringall tag anchorname 562 %type <v.string> string varstring numberstring 563 %type <v.keep_state> keep 564 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item 565 %type <v.logquick> logquick quick log logopts logopt 566 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if 567 %type <v.qassign> qname etherqname 568 %type <v.queue> qassign qassign_list qassign_item 569 %type <v.queue_options> scheduler 570 %type <v.number> cbqflags_list cbqflags_item 571 %type <v.number> priqflags_list priqflags_item 572 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 573 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts 574 %type <v.codel_opts> codelopts_list codelopts_item codel_opts 575 %type <v.queue_bwspec> bandwidth 576 %type <v.filter_opts> filter_opts filter_opt filter_opts_l etherfilter_opts etherfilter_opt etherfilter_opts_l 577 %type <v.filter_opts> filter_sets filter_set filter_sets_l 578 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 579 %type <v.queue_opts> queue_opts queue_opt queue_opts_l 580 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 581 %type <v.table_opts> table_opts table_opt table_opts_l 582 %type <v.pool_opts> pool_opts pool_opt pool_opts_l 583 %type <v.tagged> tagged 584 %type <v.rtableid> rtable 585 %type <v.watermarks> syncookie_opts 586 %type <v.etherproto> etherproto etherproto_list etherproto_item 587 %type <v.etherfromto> etherfromto 588 %type <v.etheraddr> etherfrom etherto 589 %type <v.bridge_to> bridge 590 %type <v.mac> xmac mac mac_list macspec 591 %% 592 593 ruleset : /* empty */ 594 | ruleset include '\n' 595 | ruleset '\n' 596 | ruleset option '\n' 597 | ruleset etherrule '\n' 598 | ruleset etheranchorrule '\n' 599 | ruleset scrubrule '\n' 600 | ruleset natrule '\n' 601 | ruleset binatrule '\n' 602 | ruleset pfrule '\n' 603 | ruleset anchorrule '\n' 604 | ruleset loadrule '\n' 605 | ruleset altqif '\n' 606 | ruleset queuespec '\n' 607 | ruleset varset '\n' 608 | ruleset antispoof '\n' 609 | ruleset tabledef '\n' 610 | '{' fakeanchor '}' '\n'; 611 | ruleset error '\n' { file->errors++; } 612 ; 613 614 include : INCLUDE STRING { 615 struct file *nfile; 616 617 if ((nfile = pushfile($2, 0)) == NULL) { 618 yyerror("failed to include file %s", $2); 619 free($2); 620 YYERROR; 621 } 622 free($2); 623 624 file = nfile; 625 lungetc('\n'); 626 } 627 ; 628 629 /* 630 * apply to previouslys specified rule: must be careful to note 631 * what that is: pf or nat or binat or rdr 632 */ 633 fakeanchor : fakeanchor '\n' 634 | fakeanchor anchorrule '\n' 635 | fakeanchor binatrule '\n' 636 | fakeanchor natrule '\n' 637 | fakeanchor pfrule '\n' 638 | fakeanchor error '\n' 639 ; 640 641 optimizer : string { 642 if (!strcmp($1, "none")) 643 $$ = 0; 644 else if (!strcmp($1, "basic")) 645 $$ = PF_OPTIMIZE_BASIC; 646 else if (!strcmp($1, "profile")) 647 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE; 648 else { 649 yyerror("unknown ruleset-optimization %s", $1); 650 YYERROR; 651 } 652 } 653 ; 654 655 optnodf : /* empty */ { $$ = 0; } 656 | NODF { $$ = 1; } 657 ; 658 659 option : SET REASSEMBLE yesno optnodf { 660 if (check_rulestate(PFCTL_STATE_OPTION)) 661 YYERROR; 662 pfctl_set_reassembly(pf, $3, $4); 663 } 664 | SET OPTIMIZATION STRING { 665 if (check_rulestate(PFCTL_STATE_OPTION)) { 666 free($3); 667 YYERROR; 668 } 669 if (pfctl_set_optimization(pf, $3) != 0) { 670 yyerror("unknown optimization %s", $3); 671 free($3); 672 YYERROR; 673 } 674 free($3); 675 } 676 | SET RULESET_OPTIMIZATION optimizer { 677 if (!(pf->opts & PF_OPT_OPTIMIZE)) { 678 pf->opts |= PF_OPT_OPTIMIZE; 679 pf->optimize = $3; 680 } 681 } 682 | SET TIMEOUT timeout_spec 683 | SET TIMEOUT '{' optnl timeout_list '}' 684 | SET LIMIT limit_spec 685 | SET LIMIT '{' optnl limit_list '}' 686 | SET LOGINTERFACE stringall { 687 if (check_rulestate(PFCTL_STATE_OPTION)) { 688 free($3); 689 YYERROR; 690 } 691 if (pfctl_set_logif(pf, $3) != 0) { 692 yyerror("error setting loginterface %s", $3); 693 free($3); 694 YYERROR; 695 } 696 free($3); 697 } 698 | SET HOSTID number { 699 if ($3 == 0 || $3 > UINT_MAX) { 700 yyerror("hostid must be non-zero"); 701 YYERROR; 702 } 703 pfctl_set_hostid(pf, $3); 704 } 705 | SET BLOCKPOLICY DROP { 706 if (pf->opts & PF_OPT_VERBOSE) 707 printf("set block-policy drop\n"); 708 if (check_rulestate(PFCTL_STATE_OPTION)) 709 YYERROR; 710 blockpolicy = PFRULE_DROP; 711 } 712 | SET BLOCKPOLICY RETURN { 713 if (pf->opts & PF_OPT_VERBOSE) 714 printf("set block-policy return\n"); 715 if (check_rulestate(PFCTL_STATE_OPTION)) 716 YYERROR; 717 blockpolicy = PFRULE_RETURN; 718 } 719 | SET FAILPOLICY DROP { 720 if (pf->opts & PF_OPT_VERBOSE) 721 printf("set fail-policy drop\n"); 722 if (check_rulestate(PFCTL_STATE_OPTION)) 723 YYERROR; 724 failpolicy = PFRULE_DROP; 725 } 726 | SET FAILPOLICY RETURN { 727 if (pf->opts & PF_OPT_VERBOSE) 728 printf("set fail-policy return\n"); 729 if (check_rulestate(PFCTL_STATE_OPTION)) 730 YYERROR; 731 failpolicy = PFRULE_RETURN; 732 } 733 | SET REQUIREORDER yesno { 734 if (pf->opts & PF_OPT_VERBOSE) 735 printf("set require-order %s\n", 736 $3 == 1 ? "yes" : "no"); 737 require_order = $3; 738 } 739 | SET FINGERPRINTS STRING { 740 if (pf->opts & PF_OPT_VERBOSE) 741 printf("set fingerprints \"%s\"\n", $3); 742 if (check_rulestate(PFCTL_STATE_OPTION)) { 743 free($3); 744 YYERROR; 745 } 746 if (!pf->anchor->name[0]) { 747 if (pfctl_file_fingerprints(pf->dev, 748 pf->opts, $3)) { 749 yyerror("error loading " 750 "fingerprints %s", $3); 751 free($3); 752 YYERROR; 753 } 754 } 755 free($3); 756 } 757 | SET STATEPOLICY statelock { 758 if (pf->opts & PF_OPT_VERBOSE) 759 switch ($3) { 760 case 0: 761 printf("set state-policy floating\n"); 762 break; 763 case PFRULE_IFBOUND: 764 printf("set state-policy if-bound\n"); 765 break; 766 } 767 default_statelock = $3; 768 } 769 | SET DEBUG STRING { 770 if (check_rulestate(PFCTL_STATE_OPTION)) { 771 free($3); 772 YYERROR; 773 } 774 if (pfctl_do_set_debug(pf, $3) != 0) { 775 yyerror("error setting debuglevel %s", $3); 776 free($3); 777 YYERROR; 778 } 779 free($3); 780 } 781 | SET SKIP interface { 782 if (expand_skip_interface($3) != 0) { 783 yyerror("error setting skip interface(s)"); 784 YYERROR; 785 } 786 } 787 | SET STATEDEFAULTS state_opt_list { 788 if (keep_state_defaults != NULL) { 789 yyerror("cannot redefine state-defaults"); 790 YYERROR; 791 } 792 keep_state_defaults = $3; 793 } 794 | SET KEEPCOUNTERS { 795 pf->keep_counters = true; 796 } 797 | SET SYNCOOKIES syncookie_val syncookie_opts { 798 if (pfctl_cfg_syncookies(pf, $3, $4)) { 799 yyerror("error setting syncookies"); 800 YYERROR; 801 } 802 } 803 ; 804 805 syncookie_val : STRING { 806 if (!strcmp($1, "never")) 807 $$ = PFCTL_SYNCOOKIES_NEVER; 808 else if (!strcmp($1, "adaptive")) 809 $$ = PFCTL_SYNCOOKIES_ADAPTIVE; 810 else if (!strcmp($1, "always")) 811 $$ = PFCTL_SYNCOOKIES_ALWAYS; 812 else { 813 yyerror("illegal value for syncookies"); 814 YYERROR; 815 } 816 } 817 ; 818 syncookie_opts : /* empty */ { $$ = NULL; } 819 | { 820 memset(&syncookie_opts, 0, sizeof(syncookie_opts)); 821 } '(' syncookie_opt_l ')' { $$ = &syncookie_opts; } 822 ; 823 824 syncookie_opt_l : syncookie_opt_l comma syncookie_opt 825 | syncookie_opt 826 ; 827 828 syncookie_opt : STRING STRING { 829 double val; 830 char *cp; 831 832 val = strtod($2, &cp); 833 if (cp == NULL || strcmp(cp, "%")) 834 YYERROR; 835 if (val <= 0 || val > 100) { 836 yyerror("illegal percentage value"); 837 YYERROR; 838 } 839 if (!strcmp($1, "start")) { 840 syncookie_opts.hi = val; 841 } else if (!strcmp($1, "end")) { 842 syncookie_opts.lo = val; 843 } else { 844 yyerror("illegal syncookie option"); 845 YYERROR; 846 } 847 } 848 ; 849 850 stringall : STRING { $$ = $1; } 851 | ALL { 852 if (($$ = strdup("all")) == NULL) { 853 err(1, "stringall: strdup"); 854 } 855 } 856 ; 857 858 string : STRING string { 859 if (asprintf(&$$, "%s %s", $1, $2) == -1) 860 err(1, "string: asprintf"); 861 free($1); 862 free($2); 863 } 864 | STRING 865 ; 866 867 varstring : numberstring varstring { 868 if (asprintf(&$$, "%s %s", $1, $2) == -1) 869 err(1, "string: asprintf"); 870 free($1); 871 free($2); 872 } 873 | numberstring 874 ; 875 876 numberstring : NUMBER { 877 char *s; 878 if (asprintf(&s, "%lld", (long long)$1) == -1) { 879 yyerror("string: asprintf"); 880 YYERROR; 881 } 882 $$ = s; 883 } 884 | STRING 885 ; 886 887 varset : STRING '=' varstring { 888 char *s = $1; 889 if (pf->opts & PF_OPT_VERBOSE) 890 printf("%s = \"%s\"\n", $1, $3); 891 while (*s++) { 892 if (isspace((unsigned char)*s)) { 893 yyerror("macro name cannot contain " 894 "whitespace"); 895 YYERROR; 896 } 897 } 898 if (symset($1, $3, 0) == -1) 899 err(1, "cannot store variable %s", $1); 900 free($1); 901 free($3); 902 } 903 ; 904 905 anchorname : STRING { $$ = $1; } 906 | /* empty */ { $$ = NULL; } 907 ; 908 909 pfa_anchorlist : /* empty */ 910 | pfa_anchorlist '\n' 911 | pfa_anchorlist pfrule '\n' 912 | pfa_anchorlist anchorrule '\n' 913 | pfa_anchorlist include '\n' 914 ; 915 916 pfa_anchor : '{' 917 { 918 char ta[PF_ANCHOR_NAME_SIZE]; 919 struct pfctl_ruleset *rs; 920 921 /* stepping into a brace anchor */ 922 pf->asd++; 923 pf->bn++; 924 925 /* 926 * Anchor contents are parsed before the anchor rule 927 * production completes, so we don't know the real 928 * location yet. Create a holding ruleset in the root; 929 * contents will be moved afterwards. 930 */ 931 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 932 rs = pf_find_or_create_ruleset(ta); 933 if (rs == NULL) 934 err(1, "pfa_anchor: pf_find_or_create_ruleset"); 935 pf->astack[pf->asd] = rs->anchor; 936 pf->anchor = rs->anchor; 937 } '\n' pfa_anchorlist '}' 938 { 939 pf->alast = pf->anchor; 940 pf->asd--; 941 pf->anchor = pf->astack[pf->asd]; 942 } 943 | /* empty */ 944 ; 945 946 anchorrule : ANCHOR anchorname dir quick interface af proto fromto 947 filter_opts pfa_anchor 948 { 949 struct pfctl_rule r; 950 struct node_proto *proto; 951 952 if (check_rulestate(PFCTL_STATE_FILTER)) { 953 if ($2) 954 free($2); 955 YYERROR; 956 } 957 958 if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) { 959 free($2); 960 yyerror("anchor names beginning with '_' " 961 "are reserved for internal use"); 962 YYERROR; 963 } 964 965 pfctl_init_rule(&r); 966 967 if (pf->astack[pf->asd + 1]) { 968 if ($2 && strchr($2, '/') != NULL) { 969 free($2); 970 yyerror("anchor paths containing '/' " 971 "cannot be used for inline anchors."); 972 YYERROR; 973 } 974 975 /* Move inline rules into relative location. */ 976 pfctl_anchor_setup(&r, 977 &pf->astack[pf->asd]->ruleset, 978 $2 ? $2 : pf->alast->name); 979 980 if (r.anchor == NULL) 981 err(1, "anchorrule: unable to " 982 "create ruleset"); 983 984 if (pf->alast != r.anchor) { 985 if (r.anchor->match) { 986 yyerror("inline anchor '%s' " 987 "already exists", 988 r.anchor->name); 989 YYERROR; 990 } 991 mv_rules(&pf->alast->ruleset, 992 &r.anchor->ruleset); 993 } 994 pf_remove_if_empty_ruleset(&pf->alast->ruleset); 995 pf->alast = r.anchor; 996 } else { 997 if (!$2) { 998 yyerror("anchors without explicit " 999 "rules must specify a name"); 1000 YYERROR; 1001 } 1002 } 1003 r.direction = $3; 1004 r.quick = $4.quick; 1005 r.af = $6; 1006 r.prob = $9.prob; 1007 r.rtableid = $9.rtableid; 1008 r.ridentifier = $9.ridentifier; 1009 1010 if ($9.tag) 1011 if (strlcpy(r.tagname, $9.tag, 1012 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1013 yyerror("tag too long, max %u chars", 1014 PF_TAG_NAME_SIZE - 1); 1015 YYERROR; 1016 } 1017 if ($9.match_tag) 1018 if (strlcpy(r.match_tagname, $9.match_tag, 1019 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1020 yyerror("tag too long, max %u chars", 1021 PF_TAG_NAME_SIZE - 1); 1022 YYERROR; 1023 } 1024 r.match_tag_not = $9.match_tag_not; 1025 if (rule_label(&r, $9.label)) 1026 YYERROR; 1027 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1028 free($9.label[i]); 1029 r.flags = $9.flags.b1; 1030 r.flagset = $9.flags.b2; 1031 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 1032 yyerror("flags always false"); 1033 YYERROR; 1034 } 1035 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 1036 for (proto = $7; proto != NULL && 1037 proto->proto != IPPROTO_TCP; 1038 proto = proto->next) 1039 ; /* nothing */ 1040 if (proto == NULL && $7 != NULL) { 1041 if ($9.flags.b1 || $9.flags.b2) 1042 yyerror( 1043 "flags only apply to tcp"); 1044 if ($8.src_os) 1045 yyerror( 1046 "OS fingerprinting only " 1047 "applies to tcp"); 1048 YYERROR; 1049 } 1050 } 1051 1052 r.tos = $9.tos; 1053 1054 if ($9.keep.action) { 1055 yyerror("cannot specify state handling " 1056 "on anchors"); 1057 YYERROR; 1058 } 1059 1060 if ($9.match_tag) 1061 if (strlcpy(r.match_tagname, $9.match_tag, 1062 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1063 yyerror("tag too long, max %u chars", 1064 PF_TAG_NAME_SIZE - 1); 1065 YYERROR; 1066 } 1067 r.match_tag_not = $9.match_tag_not; 1068 if ($9.marker & FOM_PRIO) { 1069 if ($9.prio == 0) 1070 r.prio = PF_PRIO_ZERO; 1071 else 1072 r.prio = $9.prio; 1073 } 1074 if ($9.marker & FOM_SETPRIO) { 1075 r.set_prio[0] = $9.set_prio[0]; 1076 r.set_prio[1] = $9.set_prio[1]; 1077 r.scrub_flags |= PFSTATE_SETPRIO; 1078 } 1079 1080 decide_address_family($8.src.host, &r.af); 1081 decide_address_family($8.dst.host, &r.af); 1082 1083 expand_rule(&r, $5, NULL, NULL, NULL, 1084 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host, 1085 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec, 1086 pf->astack[pf->asd + 1] ? pf->alast->name : $2); 1087 free($2); 1088 pf->astack[pf->asd + 1] = NULL; 1089 } 1090 | NATANCHOR string interface af proto fromto rtable { 1091 struct pfctl_rule r; 1092 1093 if (check_rulestate(PFCTL_STATE_NAT)) { 1094 free($2); 1095 YYERROR; 1096 } 1097 1098 pfctl_init_rule(&r); 1099 1100 r.action = PF_NAT; 1101 r.af = $4; 1102 r.rtableid = $7; 1103 1104 decide_address_family($6.src.host, &r.af); 1105 decide_address_family($6.dst.host, &r.af); 1106 1107 expand_rule(&r, $3, NULL, NULL, NULL, 1108 $5, $6.src_os, $6.src.host, $6.src.port, $6.dst.host, 1109 $6.dst.port, 0, 0, 0, 0, $2); 1110 free($2); 1111 } 1112 | RDRANCHOR string interface af proto fromto rtable { 1113 struct pfctl_rule r; 1114 1115 if (check_rulestate(PFCTL_STATE_NAT)) { 1116 free($2); 1117 YYERROR; 1118 } 1119 1120 pfctl_init_rule(&r); 1121 1122 r.action = PF_RDR; 1123 r.af = $4; 1124 r.rtableid = $7; 1125 1126 decide_address_family($6.src.host, &r.af); 1127 decide_address_family($6.dst.host, &r.af); 1128 1129 if ($6.src.port != NULL) { 1130 yyerror("source port parameter not supported" 1131 " in rdr-anchor"); 1132 YYERROR; 1133 } 1134 if ($6.dst.port != NULL) { 1135 if ($6.dst.port->next != NULL) { 1136 yyerror("destination port list " 1137 "expansion not supported in " 1138 "rdr-anchor"); 1139 YYERROR; 1140 } else if ($6.dst.port->op != PF_OP_EQ) { 1141 yyerror("destination port operators" 1142 " not supported in rdr-anchor"); 1143 YYERROR; 1144 } 1145 r.dst.port[0] = $6.dst.port->port[0]; 1146 r.dst.port[1] = $6.dst.port->port[1]; 1147 r.dst.port_op = $6.dst.port->op; 1148 } 1149 1150 expand_rule(&r, $3, NULL, NULL, NULL, 1151 $5, $6.src_os, $6.src.host, $6.src.port, $6.dst.host, 1152 $6.dst.port, 0, 0, 0, 0, $2); 1153 free($2); 1154 } 1155 | BINATANCHOR string interface af proto fromto rtable { 1156 struct pfctl_rule r; 1157 1158 if (check_rulestate(PFCTL_STATE_NAT)) { 1159 free($2); 1160 YYERROR; 1161 } 1162 1163 pfctl_init_rule(&r); 1164 1165 r.action = PF_BINAT; 1166 r.af = $4; 1167 r.rtableid = $7; 1168 if ($5 != NULL) { 1169 if ($5->next != NULL) { 1170 yyerror("proto list expansion" 1171 " not supported in binat-anchor"); 1172 YYERROR; 1173 } 1174 r.proto = $5->proto; 1175 free($5); 1176 } 1177 1178 if ($6.src.host != NULL || $6.src.port != NULL || 1179 $6.dst.host != NULL || $6.dst.port != NULL) { 1180 yyerror("fromto parameter not supported" 1181 " in binat-anchor"); 1182 YYERROR; 1183 } 1184 1185 decide_address_family($6.src.host, &r.af); 1186 decide_address_family($6.dst.host, &r.af); 1187 1188 pfctl_append_rule(pf, &r, $2); 1189 free($2); 1190 } 1191 ; 1192 1193 loadrule : LOAD ANCHOR string FROM string { 1194 struct loadanchors *loadanchor; 1195 1196 if (strlen(pf->anchor->name) + 1 + 1197 strlen($3) >= MAXPATHLEN) { 1198 yyerror("anchorname %s too long, max %u\n", 1199 $3, MAXPATHLEN - 1); 1200 free($3); 1201 YYERROR; 1202 } 1203 loadanchor = calloc(1, sizeof(struct loadanchors)); 1204 if (loadanchor == NULL) 1205 err(1, "loadrule: calloc"); 1206 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) == 1207 NULL) 1208 err(1, "loadrule: malloc"); 1209 if (pf->anchor->name[0]) 1210 snprintf(loadanchor->anchorname, MAXPATHLEN, 1211 "%s/%s", pf->anchor->name, $3); 1212 else 1213 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN); 1214 if ((loadanchor->filename = strdup($5)) == NULL) 1215 err(1, "loadrule: strdup"); 1216 1217 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 1218 entries); 1219 1220 free($3); 1221 free($5); 1222 }; 1223 1224 scrubaction : no SCRUB { 1225 $$.b2 = $$.w = 0; 1226 if ($1) 1227 $$.b1 = PF_NOSCRUB; 1228 else 1229 $$.b1 = PF_SCRUB; 1230 } 1231 ; 1232 1233 etherrule : ETHER action dir quick interface bridge etherproto etherfromto l3fromto etherfilter_opts 1234 { 1235 struct pfctl_eth_rule r; 1236 1237 bzero(&r, sizeof(r)); 1238 1239 if (check_rulestate(PFCTL_STATE_ETHER)) 1240 YYERROR; 1241 1242 r.action = $2.b1; 1243 r.direction = $3; 1244 r.quick = $4.quick; 1245 if ($10.tag != NULL) 1246 strlcpy(r.tagname, $10.tag, sizeof(r.tagname)); 1247 if ($10.match_tag) 1248 if (strlcpy(r.match_tagname, $10.match_tag, 1249 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1250 yyerror("tag too long, max %u chars", 1251 PF_TAG_NAME_SIZE - 1); 1252 YYERROR; 1253 } 1254 r.match_tag_not = $10.match_tag_not; 1255 if ($10.queues.qname != NULL) 1256 strlcpy(r.qname, $10.queues.qname, sizeof(r.qname)); 1257 r.dnpipe = $10.dnpipe; 1258 r.dnflags = $10.free_flags; 1259 if (eth_rule_label(&r, $10.label)) 1260 YYERROR; 1261 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1262 free($10.label[i]); 1263 r.ridentifier = $10.ridentifier; 1264 1265 expand_eth_rule(&r, $5, $7, $8.src, $8.dst, 1266 $9.src.host, $9.dst.host, $6, ""); 1267 } 1268 ; 1269 1270 etherpfa_anchorlist : /* empty */ 1271 | etherpfa_anchorlist '\n' 1272 | etherpfa_anchorlist etherrule '\n' 1273 | etherpfa_anchorlist etheranchorrule '\n' 1274 ; 1275 1276 etherpfa_anchor : '{' 1277 { 1278 char ta[PF_ANCHOR_NAME_SIZE]; 1279 struct pfctl_eth_ruleset *rs; 1280 1281 /* steping into a brace anchor */ 1282 pf->asd++; 1283 pf->bn++; 1284 1285 /* create a holding ruleset in the root */ 1286 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 1287 rs = pf_find_or_create_eth_ruleset(ta); 1288 if (rs == NULL) 1289 err(1, "etherpfa_anchor: pf_find_or_create_eth_ruleset"); 1290 pf->eastack[pf->asd] = rs->anchor; 1291 pf->eanchor = rs->anchor; 1292 } '\n' etherpfa_anchorlist '}' 1293 { 1294 pf->ealast = pf->eanchor; 1295 pf->asd--; 1296 pf->eanchor = pf->eastack[pf->asd]; 1297 } 1298 | /* empty */ 1299 ; 1300 1301 etheranchorrule : ETHER ANCHOR anchorname dir quick interface etherproto etherfromto l3fromto etherpfa_anchor 1302 { 1303 struct pfctl_eth_rule r; 1304 1305 if (check_rulestate(PFCTL_STATE_ETHER)) { 1306 free($3); 1307 YYERROR; 1308 } 1309 1310 if ($3 && ($3[0] == '_' || strstr($3, "/_") != NULL)) { 1311 free($3); 1312 yyerror("anchor names beginning with '_' " 1313 "are reserved for internal use"); 1314 YYERROR; 1315 } 1316 1317 memset(&r, 0, sizeof(r)); 1318 if (pf->eastack[pf->asd + 1]) { 1319 if ($3 && strchr($3, '/') != NULL) { 1320 free($3); 1321 yyerror("anchor paths containing '/' " 1322 "cannot be used for inline anchors."); 1323 YYERROR; 1324 } 1325 1326 /* Move inline rules into relative location. */ 1327 pfctl_eth_anchor_setup(pf, &r, 1328 &pf->eastack[pf->asd]->ruleset, 1329 $3 ? $3 : pf->ealast->name); 1330 if (r.anchor == NULL) 1331 err(1, "etheranchorrule: unable to " 1332 "create ruleset"); 1333 1334 if (pf->ealast != r.anchor) { 1335 if (r.anchor->match) { 1336 yyerror("inline anchor '%s' " 1337 "already exists", 1338 r.anchor->name); 1339 YYERROR; 1340 } 1341 mv_eth_rules(&pf->ealast->ruleset, 1342 &r.anchor->ruleset); 1343 } 1344 pf_remove_if_empty_eth_ruleset(&pf->ealast->ruleset); 1345 pf->ealast = r.anchor; 1346 } else { 1347 if (!$3) { 1348 yyerror("anchors without explicit " 1349 "rules must specify a name"); 1350 YYERROR; 1351 } 1352 } 1353 1354 r.direction = $4; 1355 r.quick = $5.quick; 1356 1357 expand_eth_rule(&r, $6, $7, $8.src, $8.dst, 1358 $9.src.host, $9.dst.host, NULL, 1359 pf->eastack[pf->asd + 1] ? pf->ealast->name : $3); 1360 1361 free($3); 1362 pf->eastack[pf->asd + 1] = NULL; 1363 } 1364 ; 1365 1366 etherfilter_opts : { 1367 bzero(&filter_opts, sizeof filter_opts); 1368 } 1369 etherfilter_opts_l 1370 { $$ = filter_opts; } 1371 | /* empty */ { 1372 bzero(&filter_opts, sizeof filter_opts); 1373 $$ = filter_opts; 1374 } 1375 ; 1376 1377 etherfilter_opts_l : etherfilter_opts_l etherfilter_opt 1378 | etherfilter_opt 1379 1380 etherfilter_opt : etherqname { 1381 if (filter_opts.queues.qname) { 1382 yyerror("queue cannot be redefined"); 1383 YYERROR; 1384 } 1385 filter_opts.queues = $1; 1386 } 1387 | RIDENTIFIER number { 1388 filter_opts.ridentifier = $2; 1389 } 1390 | label { 1391 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 1392 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 1393 YYERROR; 1394 } 1395 filter_opts.label[filter_opts.labelcount++] = $1; 1396 } 1397 | TAG string { 1398 filter_opts.tag = $2; 1399 } 1400 | not TAGGED string { 1401 filter_opts.match_tag = $3; 1402 filter_opts.match_tag_not = $1; 1403 } 1404 | DNPIPE number { 1405 filter_opts.dnpipe = $2; 1406 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 1407 } 1408 | DNQUEUE number { 1409 filter_opts.dnpipe = $2; 1410 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 1411 } 1412 ; 1413 1414 bridge : /* empty */ { 1415 $$ = NULL; 1416 } 1417 | BRIDGE_TO STRING { 1418 $$ = strdup($2); 1419 } 1420 ; 1421 1422 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts 1423 { 1424 struct pfctl_rule r; 1425 1426 if (check_rulestate(PFCTL_STATE_SCRUB)) 1427 YYERROR; 1428 1429 pfctl_init_rule(&r); 1430 1431 r.action = $1.b1; 1432 r.direction = $2; 1433 1434 r.log = $3.log; 1435 r.logif = $3.logif; 1436 if ($3.quick) { 1437 yyerror("scrub rules do not support 'quick'"); 1438 YYERROR; 1439 } 1440 1441 r.af = $5; 1442 if ($8.nodf) 1443 r.rule_flag |= PFRULE_NODF; 1444 if ($8.randomid) 1445 r.rule_flag |= PFRULE_RANDOMID; 1446 if ($8.reassemble_tcp) { 1447 if (r.direction != PF_INOUT) { 1448 yyerror("reassemble tcp rules can not " 1449 "specify direction"); 1450 YYERROR; 1451 } 1452 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 1453 } 1454 if ($8.minttl) 1455 r.min_ttl = $8.minttl; 1456 if ($8.maxmss) 1457 r.max_mss = $8.maxmss; 1458 if ($8.marker & FOM_SETTOS) { 1459 r.rule_flag |= PFRULE_SET_TOS; 1460 r.set_tos = $8.settos; 1461 } 1462 if ($8.fragcache) 1463 r.rule_flag |= $8.fragcache; 1464 if ($8.match_tag) 1465 if (strlcpy(r.match_tagname, $8.match_tag, 1466 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1467 yyerror("tag too long, max %u chars", 1468 PF_TAG_NAME_SIZE - 1); 1469 YYERROR; 1470 } 1471 r.match_tag_not = $8.match_tag_not; 1472 r.rtableid = $8.rtableid; 1473 1474 expand_rule(&r, $4, NULL, NULL, NULL, 1475 $6, $7.src_os, $7.src.host, $7.src.port, $7.dst.host, 1476 $7.dst.port, NULL, NULL, NULL, NULL, ""); 1477 } 1478 ; 1479 1480 scrub_opts : { 1481 bzero(&scrub_opts, sizeof scrub_opts); 1482 scrub_opts.rtableid = -1; 1483 } 1484 scrub_opts_l 1485 { $$ = scrub_opts; } 1486 | /* empty */ { 1487 bzero(&scrub_opts, sizeof scrub_opts); 1488 scrub_opts.rtableid = -1; 1489 $$ = scrub_opts; 1490 } 1491 ; 1492 1493 scrub_opts_l : scrub_opts_l comma scrub_opt 1494 | scrub_opt 1495 ; 1496 1497 scrub_opt : NODF { 1498 if (scrub_opts.nodf) { 1499 yyerror("no-df cannot be respecified"); 1500 YYERROR; 1501 } 1502 scrub_opts.nodf = 1; 1503 } 1504 | MINTTL NUMBER { 1505 if (scrub_opts.marker & FOM_MINTTL) { 1506 yyerror("min-ttl cannot be respecified"); 1507 YYERROR; 1508 } 1509 if ($2 < 0 || $2 > 255) { 1510 yyerror("illegal min-ttl value %d", $2); 1511 YYERROR; 1512 } 1513 scrub_opts.marker |= FOM_MINTTL; 1514 scrub_opts.minttl = $2; 1515 } 1516 | MAXMSS NUMBER { 1517 if (scrub_opts.marker & FOM_MAXMSS) { 1518 yyerror("max-mss cannot be respecified"); 1519 YYERROR; 1520 } 1521 if ($2 < 0 || $2 > 65535) { 1522 yyerror("illegal max-mss value %d", $2); 1523 YYERROR; 1524 } 1525 scrub_opts.marker |= FOM_MAXMSS; 1526 scrub_opts.maxmss = $2; 1527 } 1528 | SETTOS tos { 1529 if (scrub_opts.marker & FOM_SETTOS) { 1530 yyerror("set-tos cannot be respecified"); 1531 YYERROR; 1532 } 1533 scrub_opts.marker |= FOM_SETTOS; 1534 scrub_opts.settos = $2; 1535 } 1536 | fragcache { 1537 if (scrub_opts.marker & FOM_FRAGCACHE) { 1538 yyerror("fragcache cannot be respecified"); 1539 YYERROR; 1540 } 1541 scrub_opts.marker |= FOM_FRAGCACHE; 1542 scrub_opts.fragcache = $1; 1543 } 1544 | REASSEMBLE STRING { 1545 if (strcasecmp($2, "tcp") != 0) { 1546 yyerror("scrub reassemble supports only tcp, " 1547 "not '%s'", $2); 1548 free($2); 1549 YYERROR; 1550 } 1551 free($2); 1552 if (scrub_opts.reassemble_tcp) { 1553 yyerror("reassemble tcp cannot be respecified"); 1554 YYERROR; 1555 } 1556 scrub_opts.reassemble_tcp = 1; 1557 } 1558 | RANDOMID { 1559 if (scrub_opts.randomid) { 1560 yyerror("random-id cannot be respecified"); 1561 YYERROR; 1562 } 1563 scrub_opts.randomid = 1; 1564 } 1565 | RTABLE NUMBER { 1566 if ($2 < 0 || $2 > rt_tableid_max()) { 1567 yyerror("invalid rtable id"); 1568 YYERROR; 1569 } 1570 scrub_opts.rtableid = $2; 1571 } 1572 | not TAGGED string { 1573 scrub_opts.match_tag = $3; 1574 scrub_opts.match_tag_not = $1; 1575 } 1576 ; 1577 1578 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 1579 | FRAGMENT NO REASSEMBLE { $$ = PFRULE_FRAGMENT_NOREASS; } 1580 ; 1581 1582 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 1583 struct pfctl_rule r; 1584 struct node_host *h = NULL, *hh; 1585 struct node_if *i, *j; 1586 1587 if (check_rulestate(PFCTL_STATE_FILTER)) 1588 YYERROR; 1589 1590 for (i = $3; i; i = i->next) { 1591 pfctl_init_rule(&r); 1592 1593 r.action = PF_DROP; 1594 r.direction = PF_IN; 1595 r.log = $2.log; 1596 r.logif = $2.logif; 1597 r.quick = $2.quick; 1598 r.af = $4; 1599 r.ridentifier = $5.ridentifier; 1600 if (rule_label(&r, $5.label)) 1601 YYERROR; 1602 r.rtableid = $5.rtableid; 1603 j = calloc(1, sizeof(struct node_if)); 1604 if (j == NULL) 1605 err(1, "antispoof: calloc"); 1606 if (strlcpy(j->ifname, i->ifname, 1607 sizeof(j->ifname)) >= sizeof(j->ifname)) { 1608 free(j); 1609 yyerror("interface name too long"); 1610 YYERROR; 1611 } 1612 j->not = 1; 1613 if (i->dynamic) { 1614 h = calloc(1, sizeof(*h)); 1615 if (h == NULL) 1616 err(1, "address: calloc"); 1617 h->addr.type = PF_ADDR_DYNIFTL; 1618 set_ipmask(h, 128); 1619 if (strlcpy(h->addr.v.ifname, i->ifname, 1620 sizeof(h->addr.v.ifname)) >= 1621 sizeof(h->addr.v.ifname)) { 1622 free(h); 1623 yyerror( 1624 "interface name too long"); 1625 YYERROR; 1626 } 1627 hh = malloc(sizeof(*hh)); 1628 if (hh == NULL) 1629 err(1, "address: malloc"); 1630 bcopy(h, hh, sizeof(*hh)); 1631 h->addr.iflags = PFI_AFLAG_NETWORK; 1632 } else { 1633 h = ifa_lookup(j->ifname, 1634 PFI_AFLAG_NETWORK); 1635 hh = NULL; 1636 } 1637 1638 if (h != NULL) 1639 expand_rule(&r, j, NULL, NULL, NULL, 1640 NULL, NULL, h, NULL, NULL, NULL, 1641 NULL, NULL, NULL, NULL, ""); 1642 1643 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 1644 bzero(&r, sizeof(r)); 1645 1646 r.action = PF_DROP; 1647 r.direction = PF_IN; 1648 r.log = $2.log; 1649 r.logif = $2.logif; 1650 r.quick = $2.quick; 1651 r.af = $4; 1652 r.ridentifier = $5.ridentifier; 1653 if (rule_label(&r, $5.label)) 1654 YYERROR; 1655 r.rtableid = $5.rtableid; 1656 if (hh != NULL) 1657 h = hh; 1658 else 1659 h = ifa_lookup(i->ifname, 0); 1660 if (h != NULL) 1661 expand_rule(&r, NULL, NULL, 1662 NULL, NULL, NULL, NULL, h, 1663 NULL, NULL, NULL, NULL, 1664 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 pfctl_init_rule(&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 r.rule_flag |= PFRULE_AFTO; 2431 2432 r.af = $6; 2433 if ($9.tag) 2434 if (strlcpy(r.tagname, $9.tag, 2435 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 2436 yyerror("tag too long, max %u chars", 2437 PF_TAG_NAME_SIZE - 1); 2438 YYERROR; 2439 } 2440 if ($9.match_tag) 2441 if (strlcpy(r.match_tagname, $9.match_tag, 2442 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 2443 yyerror("tag too long, max %u chars", 2444 PF_TAG_NAME_SIZE - 1); 2445 YYERROR; 2446 } 2447 r.match_tag_not = $9.match_tag_not; 2448 if (rule_label(&r, $9.label)) 2449 YYERROR; 2450 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 2451 free($9.label[i]); 2452 r.ridentifier = $9.ridentifier; 2453 r.flags = $9.flags.b1; 2454 r.flagset = $9.flags.b2; 2455 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) { 2456 yyerror("flags always false"); 2457 YYERROR; 2458 } 2459 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 2460 for (proto = $7; proto != NULL && 2461 proto->proto != IPPROTO_TCP; 2462 proto = proto->next) 2463 ; /* nothing */ 2464 if (proto == NULL && $7 != NULL) { 2465 if ($9.flags.b1 || $9.flags.b2) 2466 yyerror( 2467 "flags only apply to tcp"); 2468 if ($8.src_os) 2469 yyerror( 2470 "OS fingerprinting only " 2471 "apply to tcp"); 2472 YYERROR; 2473 } 2474 #if 0 2475 if (($9.flags.b1 & parse_flags("S")) == 0 && 2476 $8.src_os) { 2477 yyerror("OS fingerprinting requires " 2478 "the SYN TCP flag (flags S/SA)"); 2479 YYERROR; 2480 } 2481 #endif 2482 } 2483 2484 r.tos = $9.tos; 2485 r.keep_state = $9.keep.action; 2486 o = $9.keep.options; 2487 2488 /* 'keep state' by default on pass rules. */ 2489 if (!r.keep_state && !r.action && 2490 !($9.marker & FOM_KEEP)) { 2491 r.keep_state = PF_STATE_NORMAL; 2492 o = keep_state_defaults; 2493 defaults = 1; 2494 } 2495 2496 while (o) { 2497 struct node_state_opt *p = o; 2498 2499 switch (o->type) { 2500 case PF_STATE_OPT_MAX: 2501 if (r.max_states) { 2502 yyerror("state option 'max' " 2503 "multiple definitions"); 2504 YYERROR; 2505 } 2506 r.max_states = o->data.max_states; 2507 break; 2508 case PF_STATE_OPT_NOSYNC: 2509 if (r.rule_flag & PFRULE_NOSYNC) { 2510 yyerror("state option 'sync' " 2511 "multiple definitions"); 2512 YYERROR; 2513 } 2514 r.rule_flag |= PFRULE_NOSYNC; 2515 break; 2516 case PF_STATE_OPT_SRCTRACK: 2517 if (srctrack) { 2518 yyerror("state option " 2519 "'source-track' " 2520 "multiple definitions"); 2521 YYERROR; 2522 } 2523 srctrack = o->data.src_track; 2524 r.rule_flag |= PFRULE_SRCTRACK; 2525 break; 2526 case PF_STATE_OPT_MAX_SRC_STATES: 2527 if (r.max_src_states) { 2528 yyerror("state option " 2529 "'max-src-states' " 2530 "multiple definitions"); 2531 YYERROR; 2532 } 2533 if (o->data.max_src_states == 0) { 2534 yyerror("'max-src-states' must " 2535 "be > 0"); 2536 YYERROR; 2537 } 2538 r.max_src_states = 2539 o->data.max_src_states; 2540 r.rule_flag |= PFRULE_SRCTRACK; 2541 break; 2542 case PF_STATE_OPT_OVERLOAD: 2543 if (r.overload_tblname[0]) { 2544 yyerror("multiple 'overload' " 2545 "table definitions"); 2546 YYERROR; 2547 } 2548 if (strlcpy(r.overload_tblname, 2549 o->data.overload.tblname, 2550 PF_TABLE_NAME_SIZE) >= 2551 PF_TABLE_NAME_SIZE) { 2552 yyerror("state option: " 2553 "strlcpy"); 2554 YYERROR; 2555 } 2556 r.flush = o->data.overload.flush; 2557 break; 2558 case PF_STATE_OPT_MAX_SRC_CONN: 2559 if (r.max_src_conn) { 2560 yyerror("state option " 2561 "'max-src-conn' " 2562 "multiple definitions"); 2563 YYERROR; 2564 } 2565 if (o->data.max_src_conn == 0) { 2566 yyerror("'max-src-conn' " 2567 "must be > 0"); 2568 YYERROR; 2569 } 2570 r.max_src_conn = 2571 o->data.max_src_conn; 2572 r.rule_flag |= PFRULE_SRCTRACK | 2573 PFRULE_RULESRCTRACK; 2574 break; 2575 case PF_STATE_OPT_MAX_SRC_CONN_RATE: 2576 if (r.max_src_conn_rate.limit) { 2577 yyerror("state option " 2578 "'max-src-conn-rate' " 2579 "multiple definitions"); 2580 YYERROR; 2581 } 2582 if (!o->data.max_src_conn_rate.limit || 2583 !o->data.max_src_conn_rate.seconds) { 2584 yyerror("'max-src-conn-rate' " 2585 "values must be > 0"); 2586 YYERROR; 2587 } 2588 if (o->data.max_src_conn_rate.limit > 2589 PF_THRESHOLD_MAX) { 2590 yyerror("'max-src-conn-rate' " 2591 "maximum rate must be < %u", 2592 PF_THRESHOLD_MAX); 2593 YYERROR; 2594 } 2595 r.max_src_conn_rate.limit = 2596 o->data.max_src_conn_rate.limit; 2597 r.max_src_conn_rate.seconds = 2598 o->data.max_src_conn_rate.seconds; 2599 r.rule_flag |= PFRULE_SRCTRACK | 2600 PFRULE_RULESRCTRACK; 2601 break; 2602 case PF_STATE_OPT_MAX_SRC_NODES: 2603 if (r.max_src_nodes) { 2604 yyerror("state option " 2605 "'max-src-nodes' " 2606 "multiple definitions"); 2607 YYERROR; 2608 } 2609 if (o->data.max_src_nodes == 0) { 2610 yyerror("'max-src-nodes' must " 2611 "be > 0"); 2612 YYERROR; 2613 } 2614 r.max_src_nodes = 2615 o->data.max_src_nodes; 2616 r.rule_flag |= PFRULE_SRCTRACK | 2617 PFRULE_RULESRCTRACK; 2618 break; 2619 case PF_STATE_OPT_STATELOCK: 2620 if (statelock) { 2621 yyerror("state locking option: " 2622 "multiple definitions"); 2623 YYERROR; 2624 } 2625 statelock = 1; 2626 r.rule_flag |= o->data.statelock; 2627 break; 2628 case PF_STATE_OPT_SLOPPY: 2629 if (r.rule_flag & PFRULE_STATESLOPPY) { 2630 yyerror("state sloppy option: " 2631 "multiple definitions"); 2632 YYERROR; 2633 } 2634 r.rule_flag |= PFRULE_STATESLOPPY; 2635 break; 2636 case PF_STATE_OPT_PFLOW: 2637 if (r.rule_flag & PFRULE_PFLOW) { 2638 yyerror("state pflow option: " 2639 "multiple definitions"); 2640 YYERROR; 2641 } 2642 r.rule_flag |= PFRULE_PFLOW; 2643 break; 2644 case PF_STATE_OPT_ALLOW_RELATED: 2645 if (r.rule_flag & PFRULE_ALLOW_RELATED) { 2646 yyerror("state allow-related option: " 2647 "multiple definitions"); 2648 YYERROR; 2649 } 2650 r.rule_flag |= PFRULE_ALLOW_RELATED; 2651 break; 2652 case PF_STATE_OPT_TIMEOUT: 2653 if (o->data.timeout.number == 2654 PFTM_ADAPTIVE_START || 2655 o->data.timeout.number == 2656 PFTM_ADAPTIVE_END) 2657 adaptive = 1; 2658 if (r.timeout[o->data.timeout.number]) { 2659 yyerror("state timeout %s " 2660 "multiple definitions", 2661 pf_timeouts[o->data. 2662 timeout.number].name); 2663 YYERROR; 2664 } 2665 r.timeout[o->data.timeout.number] = 2666 o->data.timeout.seconds; 2667 } 2668 o = o->next; 2669 if (!defaults) 2670 free(p); 2671 } 2672 2673 /* 'flags S/SA' by default on stateful rules */ 2674 if (!r.action && !r.flags && !r.flagset && 2675 !$9.fragment && !($9.marker & FOM_FLAGS) && 2676 r.keep_state) { 2677 r.flags = parse_flags("S"); 2678 r.flagset = parse_flags("SA"); 2679 } 2680 if (!adaptive && r.max_states) { 2681 r.timeout[PFTM_ADAPTIVE_START] = 2682 (r.max_states / 10) * 6; 2683 r.timeout[PFTM_ADAPTIVE_END] = 2684 (r.max_states / 10) * 12; 2685 } 2686 if (r.rule_flag & PFRULE_SRCTRACK) { 2687 if (srctrack == PF_SRCTRACK_GLOBAL && 2688 r.max_src_nodes) { 2689 yyerror("'max-src-nodes' is " 2690 "incompatible with " 2691 "'source-track global'"); 2692 YYERROR; 2693 } 2694 if (srctrack == PF_SRCTRACK_GLOBAL && 2695 r.max_src_conn) { 2696 yyerror("'max-src-conn' is " 2697 "incompatible with " 2698 "'source-track global'"); 2699 YYERROR; 2700 } 2701 if (srctrack == PF_SRCTRACK_GLOBAL && 2702 r.max_src_conn_rate.seconds) { 2703 yyerror("'max-src-conn-rate' is " 2704 "incompatible with " 2705 "'source-track global'"); 2706 YYERROR; 2707 } 2708 if (r.timeout[PFTM_SRC_NODE] < 2709 r.max_src_conn_rate.seconds) 2710 r.timeout[PFTM_SRC_NODE] = 2711 r.max_src_conn_rate.seconds; 2712 r.rule_flag |= PFRULE_SRCTRACK; 2713 if (srctrack == PF_SRCTRACK_RULE) 2714 r.rule_flag |= PFRULE_RULESRCTRACK; 2715 } 2716 if (r.keep_state && !statelock) 2717 r.rule_flag |= default_statelock; 2718 2719 if ($9.fragment) 2720 r.rule_flag |= PFRULE_FRAGMENT; 2721 r.allow_opts = $9.allowopts; 2722 2723 decide_address_family($8.src.host, &r.af); 2724 decide_address_family($8.dst.host, &r.af); 2725 2726 if ($5.rt) { 2727 if (!r.direction) { 2728 yyerror("direction must be explicit " 2729 "with rules that specify routing"); 2730 YYERROR; 2731 } 2732 r.rt = $5.rt; 2733 decide_address_family($5.redirspec->host, &r.af); 2734 if (!(r.rule_flag & PFRULE_AFTO)) 2735 remove_invalid_hosts(&($5.redirspec->host), &r.af); 2736 if ($5.redirspec->host == NULL) { 2737 yyerror("no routing address with " 2738 "matching address family found."); 2739 YYERROR; 2740 } 2741 } 2742 if ($9.queues.qname != NULL) { 2743 if (strlcpy(r.qname, $9.queues.qname, 2744 sizeof(r.qname)) >= sizeof(r.qname)) { 2745 yyerror("rule qname too long (max " 2746 "%d chars)", sizeof(r.qname)-1); 2747 YYERROR; 2748 } 2749 free($9.queues.qname); 2750 } 2751 if ($9.queues.pqname != NULL) { 2752 if (strlcpy(r.pqname, $9.queues.pqname, 2753 sizeof(r.pqname)) >= sizeof(r.pqname)) { 2754 yyerror("rule pqname too long (max " 2755 "%d chars)", sizeof(r.pqname)-1); 2756 YYERROR; 2757 } 2758 free($9.queues.pqname); 2759 } 2760 #ifdef __FreeBSD__ 2761 r.divert.port = $9.divert.port; 2762 #else 2763 if ((r.divert.port = $9.divert.port)) { 2764 if (r.direction == PF_OUT) { 2765 if ($9.divert.addr) { 2766 yyerror("address specified " 2767 "for outgoing divert"); 2768 YYERROR; 2769 } 2770 bzero(&r.divert.addr, 2771 sizeof(r.divert.addr)); 2772 } else { 2773 if (!$9.divert.addr) { 2774 yyerror("no address specified " 2775 "for incoming divert"); 2776 YYERROR; 2777 } 2778 if ($9.divert.addr->af != r.af) { 2779 yyerror("address family " 2780 "mismatch for divert"); 2781 YYERROR; 2782 } 2783 r.divert.addr = 2784 $9.divert.addr->addr.v.a.addr; 2785 } 2786 } 2787 #endif 2788 2789 if ($9.dnpipe || $9.dnrpipe) { 2790 r.dnpipe = $9.dnpipe; 2791 r.dnrpipe = $9.dnrpipe; 2792 if ($9.free_flags & PFRULE_DN_IS_PIPE) 2793 r.free_flags |= PFRULE_DN_IS_PIPE; 2794 else 2795 r.free_flags |= PFRULE_DN_IS_QUEUE; 2796 } 2797 2798 if ($9.marker & FOM_AFTO) { 2799 r.naf = $9.nat->af; 2800 } 2801 2802 expand_rule(&r, $4, $9.nat, $9.rdr, $5.redirspec, 2803 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host, 2804 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec, ""); 2805 } 2806 ; 2807 2808 filter_opts : { 2809 bzero(&filter_opts, sizeof filter_opts); 2810 filter_opts.rtableid = -1; 2811 } 2812 filter_opts_l 2813 { $$ = filter_opts; } 2814 | /* empty */ { 2815 bzero(&filter_opts, sizeof filter_opts); 2816 filter_opts.rtableid = -1; 2817 $$ = filter_opts; 2818 } 2819 ; 2820 2821 filter_opts_l : filter_opts_l filter_opt 2822 | filter_opt 2823 ; 2824 2825 filter_opt : USER uids { 2826 if (filter_opts.uid) 2827 $2->tail->next = filter_opts.uid; 2828 filter_opts.uid = $2; 2829 } 2830 | GROUP gids { 2831 if (filter_opts.gid) 2832 $2->tail->next = filter_opts.gid; 2833 filter_opts.gid = $2; 2834 } 2835 | flags { 2836 if (filter_opts.marker & FOM_FLAGS) { 2837 yyerror("flags cannot be redefined"); 2838 YYERROR; 2839 } 2840 filter_opts.marker |= FOM_FLAGS; 2841 filter_opts.flags.b1 |= $1.b1; 2842 filter_opts.flags.b2 |= $1.b2; 2843 filter_opts.flags.w |= $1.w; 2844 filter_opts.flags.w2 |= $1.w2; 2845 } 2846 | icmpspec { 2847 if (filter_opts.marker & FOM_ICMP) { 2848 yyerror("icmp-type cannot be redefined"); 2849 YYERROR; 2850 } 2851 filter_opts.marker |= FOM_ICMP; 2852 filter_opts.icmpspec = $1; 2853 } 2854 | PRIO NUMBER { 2855 if (filter_opts.marker & FOM_PRIO) { 2856 yyerror("prio cannot be redefined"); 2857 YYERROR; 2858 } 2859 if ($2 < 0 || $2 > PF_PRIO_MAX) { 2860 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 2861 YYERROR; 2862 } 2863 filter_opts.marker |= FOM_PRIO; 2864 filter_opts.prio = $2; 2865 } 2866 | TOS tos { 2867 if (filter_opts.marker & FOM_TOS) { 2868 yyerror("tos cannot be redefined"); 2869 YYERROR; 2870 } 2871 filter_opts.marker |= FOM_TOS; 2872 filter_opts.tos = $2; 2873 } 2874 | keep { 2875 if (filter_opts.marker & FOM_KEEP) { 2876 yyerror("modulate or keep cannot be redefined"); 2877 YYERROR; 2878 } 2879 filter_opts.marker |= FOM_KEEP; 2880 filter_opts.keep.action = $1.action; 2881 filter_opts.keep.options = $1.options; 2882 } 2883 | RIDENTIFIER number { 2884 filter_opts.ridentifier = $2; 2885 } 2886 | FRAGMENT { 2887 filter_opts.fragment = 1; 2888 } 2889 | ALLOWOPTS { 2890 filter_opts.allowopts = 1; 2891 } 2892 | label { 2893 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 2894 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 2895 YYERROR; 2896 } 2897 filter_opts.label[filter_opts.labelcount++] = $1; 2898 } 2899 | qname { 2900 if (filter_opts.queues.qname) { 2901 yyerror("queue cannot be redefined"); 2902 YYERROR; 2903 } 2904 filter_opts.queues = $1; 2905 } 2906 | DNPIPE number { 2907 filter_opts.dnpipe = $2; 2908 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2909 } 2910 | DNPIPE '(' number ')' { 2911 filter_opts.dnpipe = $3; 2912 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2913 } 2914 | DNPIPE '(' number comma number ')' { 2915 filter_opts.dnrpipe = $5; 2916 filter_opts.dnpipe = $3; 2917 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2918 } 2919 | DNQUEUE number { 2920 filter_opts.dnpipe = $2; 2921 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2922 } 2923 | DNQUEUE '(' number comma number ')' { 2924 filter_opts.dnrpipe = $5; 2925 filter_opts.dnpipe = $3; 2926 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2927 } 2928 | DNQUEUE '(' number ')' { 2929 filter_opts.dnpipe = $3; 2930 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2931 } 2932 | TAG string { 2933 filter_opts.tag = $2; 2934 } 2935 | not TAGGED string { 2936 filter_opts.match_tag = $3; 2937 filter_opts.match_tag_not = $1; 2938 } 2939 | not RECEIVEDON if_item { 2940 if (filter_opts.rcv) { 2941 yyerror("cannot respecify received-on"); 2942 YYERROR; 2943 } 2944 filter_opts.rcv = $3; 2945 filter_opts.rcv->not = $1; 2946 } 2947 | PROBABILITY probability { 2948 double p; 2949 2950 p = floor($2 * UINT_MAX + 0.5); 2951 if (p < 0.0 || p > UINT_MAX) { 2952 yyerror("invalid probability: %lf", p); 2953 YYERROR; 2954 } 2955 filter_opts.prob = (u_int32_t)p; 2956 if (filter_opts.prob == 0) 2957 filter_opts.prob = 1; 2958 } 2959 | RTABLE NUMBER { 2960 if ($2 < 0 || $2 > rt_tableid_max()) { 2961 yyerror("invalid rtable id"); 2962 YYERROR; 2963 } 2964 filter_opts.rtableid = $2; 2965 } 2966 | DIVERTTO portplain { 2967 #ifdef __FreeBSD__ 2968 filter_opts.divert.port = $2.a; 2969 if (!filter_opts.divert.port) { 2970 yyerror("invalid divert port: %u", ntohs($2.a)); 2971 YYERROR; 2972 } 2973 #endif 2974 } 2975 | DIVERTTO STRING PORT portplain { 2976 #ifndef __FreeBSD__ 2977 if ((filter_opts.divert.addr = host($2)) == NULL) { 2978 yyerror("could not parse divert address: %s", 2979 $2); 2980 free($2); 2981 YYERROR; 2982 } 2983 #else 2984 if ($2) 2985 #endif 2986 free($2); 2987 filter_opts.divert.port = $4.a; 2988 if (!filter_opts.divert.port) { 2989 yyerror("invalid divert port: %u", ntohs($4.a)); 2990 YYERROR; 2991 } 2992 } 2993 | DIVERTREPLY { 2994 #ifdef __FreeBSD__ 2995 yyerror("divert-reply has no meaning in FreeBSD pf(4)"); 2996 YYERROR; 2997 #else 2998 filter_opts.divert.port = 1; /* some random value */ 2999 #endif 3000 } 3001 | SCRUB '(' scrub_opts ')' { 3002 filter_opts.nodf = $3.nodf; 3003 filter_opts.minttl = $3.minttl; 3004 if ($3.marker & FOM_SETTOS) { 3005 /* Old style rules are "scrub set-tos 0x42" 3006 * New style are "set tos 0x42 scrub (...)" 3007 * What is in "scrub(...)"" is unfortunately the 3008 * original scrub syntax so it would overwrite 3009 * "set tos" of a pass/match rule. 3010 */ 3011 filter_opts.settos = $3.settos; 3012 } 3013 filter_opts.randomid = $3.randomid; 3014 filter_opts.max_mss = $3.maxmss; 3015 if ($3.reassemble_tcp) 3016 filter_opts.marker |= FOM_SCRUB_TCP; 3017 filter_opts.marker |= $3.marker; 3018 } 3019 | AFTO af FROM port_redirspec { 3020 if (filter_opts.nat) { 3021 yyerror("cannot respecify af-to"); 3022 YYERROR; 3023 } 3024 if ($2 == 0) { 3025 yyerror("no address family specified"); 3026 YYERROR; 3027 } 3028 3029 filter_opts.nat = $4; 3030 filter_opts.nat->af = $2; 3031 if ($4->af && $4->af != $2) { 3032 yyerror("af-to addresses must be in the " 3033 "target address family"); 3034 YYERROR; 3035 } 3036 filter_opts.marker |= FOM_AFTO; 3037 } 3038 | AFTO af FROM port_redirspec TO port_redirspec { 3039 if (filter_opts.nat) { 3040 yyerror("cannot respecify af-to"); 3041 YYERROR; 3042 } 3043 if ($2 == 0) { 3044 yyerror("no address family specified"); 3045 YYERROR; 3046 } 3047 filter_opts.nat = $4; 3048 filter_opts.nat->af = $2; 3049 filter_opts.rdr = $6; 3050 filter_opts.rdr->af = $2; 3051 if (($4->af && $4->host->af != $2) || 3052 ($6->af && $6->host->af != $2)) { 3053 yyerror("af-to addresses must be in the " 3054 "target address family"); 3055 YYERROR; 3056 } 3057 filter_opts.marker |= FOM_AFTO; 3058 } 3059 | filter_sets 3060 ; 3061 3062 filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; } 3063 | SET filter_set { $$ = filter_opts; } 3064 ; 3065 3066 filter_sets_l : filter_sets_l comma filter_set 3067 | filter_set 3068 ; 3069 3070 filter_set : prio { 3071 if (filter_opts.marker & FOM_SETPRIO) { 3072 yyerror("prio cannot be redefined"); 3073 YYERROR; 3074 } 3075 filter_opts.marker |= FOM_SETPRIO; 3076 filter_opts.set_prio[0] = $1.b1; 3077 filter_opts.set_prio[1] = $1.b2; 3078 } 3079 | TOS tos { 3080 if (filter_opts.marker & FOM_SETTOS) { 3081 yyerror("tos cannot be respecified"); 3082 YYERROR; 3083 } 3084 filter_opts.marker |= FOM_SETTOS; 3085 filter_opts.settos = $2; 3086 } 3087 prio : PRIO NUMBER { 3088 if ($2 < 0 || $2 > PF_PRIO_MAX) { 3089 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 3090 YYERROR; 3091 } 3092 $$.b1 = $$.b2 = $2; 3093 } 3094 | PRIO '(' NUMBER comma NUMBER ')' { 3095 if ($3 < 0 || $3 > PF_PRIO_MAX || 3096 $5 < 0 || $5 > PF_PRIO_MAX) { 3097 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 3098 YYERROR; 3099 } 3100 $$.b1 = $3; 3101 $$.b2 = $5; 3102 } 3103 ; 3104 3105 probability : STRING { 3106 char *e; 3107 double p = strtod($1, &e); 3108 3109 if (*e == '%') { 3110 p *= 0.01; 3111 e++; 3112 } 3113 if (*e) { 3114 yyerror("invalid probability: %s", $1); 3115 free($1); 3116 YYERROR; 3117 } 3118 free($1); 3119 $$ = p; 3120 } 3121 | NUMBER { 3122 $$ = (double)$1; 3123 } 3124 ; 3125 3126 3127 action : PASS { 3128 $$.b1 = PF_PASS; 3129 $$.b2 = failpolicy; 3130 $$.w = returnicmpdefault; 3131 $$.w2 = returnicmp6default; 3132 } 3133 | MATCH { $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; } 3134 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 3135 ; 3136 3137 blockspec : /* empty */ { 3138 $$.b2 = blockpolicy; 3139 $$.w = returnicmpdefault; 3140 $$.w2 = returnicmp6default; 3141 } 3142 | DROP { 3143 $$.b2 = PFRULE_DROP; 3144 $$.w = 0; 3145 $$.w2 = 0; 3146 } 3147 | RETURNRST { 3148 $$.b2 = PFRULE_RETURNRST; 3149 $$.w = 0; 3150 $$.w2 = 0; 3151 } 3152 | RETURNRST '(' TTL NUMBER ')' { 3153 if ($4 < 0 || $4 > 255) { 3154 yyerror("illegal ttl value %d", $4); 3155 YYERROR; 3156 } 3157 $$.b2 = PFRULE_RETURNRST; 3158 $$.w = $4; 3159 $$.w2 = 0; 3160 } 3161 | RETURNICMP { 3162 $$.b2 = PFRULE_RETURNICMP; 3163 $$.w = returnicmpdefault; 3164 $$.w2 = returnicmp6default; 3165 } 3166 | RETURNICMP6 { 3167 $$.b2 = PFRULE_RETURNICMP; 3168 $$.w = returnicmpdefault; 3169 $$.w2 = returnicmp6default; 3170 } 3171 | RETURNICMP '(' reticmpspec ')' { 3172 $$.b2 = PFRULE_RETURNICMP; 3173 $$.w = $3; 3174 $$.w2 = returnicmpdefault; 3175 } 3176 | RETURNICMP6 '(' reticmp6spec ')' { 3177 $$.b2 = PFRULE_RETURNICMP; 3178 $$.w = returnicmpdefault; 3179 $$.w2 = $3; 3180 } 3181 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' { 3182 $$.b2 = PFRULE_RETURNICMP; 3183 $$.w = $3; 3184 $$.w2 = $5; 3185 } 3186 | RETURN { 3187 $$.b2 = PFRULE_RETURN; 3188 $$.w = returnicmpdefault; 3189 $$.w2 = returnicmp6default; 3190 } 3191 ; 3192 3193 reticmpspec : STRING { 3194 if (!($$ = parseicmpspec($1, AF_INET))) { 3195 free($1); 3196 YYERROR; 3197 } 3198 free($1); 3199 } 3200 | NUMBER { 3201 u_int8_t icmptype; 3202 3203 if ($1 < 0 || $1 > 255) { 3204 yyerror("invalid icmp code %lu", $1); 3205 YYERROR; 3206 } 3207 icmptype = returnicmpdefault >> 8; 3208 $$ = (icmptype << 8 | $1); 3209 } 3210 ; 3211 3212 reticmp6spec : STRING { 3213 if (!($$ = parseicmpspec($1, AF_INET6))) { 3214 free($1); 3215 YYERROR; 3216 } 3217 free($1); 3218 } 3219 | NUMBER { 3220 u_int8_t icmptype; 3221 3222 if ($1 < 0 || $1 > 255) { 3223 yyerror("invalid icmp code %lu", $1); 3224 YYERROR; 3225 } 3226 icmptype = returnicmp6default >> 8; 3227 $$ = (icmptype << 8 | $1); 3228 } 3229 ; 3230 3231 dir : /* empty */ { $$ = PF_INOUT; } 3232 | IN { $$ = PF_IN; } 3233 | OUT { $$ = PF_OUT; } 3234 ; 3235 3236 quick : /* empty */ { $$.quick = 0; } 3237 | QUICK { $$.quick = 1; } 3238 ; 3239 3240 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; } 3241 | log { $$ = $1; $$.quick = 0; } 3242 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; } 3243 | log QUICK { $$ = $1; $$.quick = 1; } 3244 | QUICK log { $$ = $2; $$.quick = 1; } 3245 ; 3246 3247 log : LOG { $$.log = PF_LOG; $$.logif = 0; } 3248 | LOG '(' logopts ')' { 3249 $$.log = PF_LOG | $3.log; 3250 $$.logif = $3.logif; 3251 } 3252 ; 3253 3254 logopts : logopt { $$ = $1; } 3255 | logopts comma logopt { 3256 $$.log = $1.log | $3.log; 3257 $$.logif = $3.logif; 3258 if ($$.logif == 0) 3259 $$.logif = $1.logif; 3260 } 3261 ; 3262 3263 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; } 3264 | MATCHES { $$.log = PF_LOG_MATCHES; $$.logif = 0; } 3265 | USER { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 3266 | GROUP { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; } 3267 | TO string { 3268 const char *errstr; 3269 u_int i; 3270 3271 $$.log = 0; 3272 if (strncmp($2, "pflog", 5)) { 3273 yyerror("%s: should be a pflog interface", $2); 3274 free($2); 3275 YYERROR; 3276 } 3277 i = strtonum($2 + 5, 0, 255, &errstr); 3278 if (errstr) { 3279 yyerror("%s: %s", $2, errstr); 3280 free($2); 3281 YYERROR; 3282 } 3283 free($2); 3284 $$.logif = i; 3285 } 3286 ; 3287 3288 interface : /* empty */ { $$ = NULL; } 3289 | ON if_item_not { $$ = $2; } 3290 | ON '{' optnl if_list '}' { $$ = $4; } 3291 ; 3292 3293 if_list : if_item_not optnl { $$ = $1; } 3294 | if_list comma if_item_not optnl { 3295 $1->tail->next = $3; 3296 $1->tail = $3; 3297 $$ = $1; 3298 } 3299 ; 3300 3301 if_item_not : not if_item { $$ = $2; $$->not = $1; } 3302 ; 3303 3304 if_item : STRING { 3305 struct node_host *n; 3306 3307 $$ = calloc(1, sizeof(struct node_if)); 3308 if ($$ == NULL) 3309 err(1, "if_item: calloc"); 3310 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 3311 sizeof($$->ifname)) { 3312 free($1); 3313 free($$); 3314 yyerror("interface name too long"); 3315 YYERROR; 3316 } 3317 3318 if ((n = ifa_exists($1)) != NULL) 3319 $$->ifa_flags = n->ifa_flags; 3320 3321 free($1); 3322 $$->not = 0; 3323 $$->next = NULL; 3324 $$->tail = $$; 3325 } 3326 | ANY { 3327 $$ = calloc(1, sizeof(struct node_if)); 3328 if ($$ == NULL) 3329 err(1, "if_item: calloc"); 3330 strlcpy($$->ifname, "any", sizeof($$->ifname)); 3331 $$->not = 0; 3332 $$->next = NULL; 3333 $$->tail = $$; 3334 } 3335 ; 3336 3337 af : /* empty */ { $$ = 0; } 3338 | INET { $$ = AF_INET; } 3339 | INET6 { $$ = AF_INET6; } 3340 ; 3341 3342 etherproto : /* empty */ { $$ = NULL; } 3343 | PROTO etherproto_item { $$ = $2; } 3344 | PROTO '{' optnl etherproto_list '}' { $$ = $4; } 3345 ; 3346 3347 etherproto_list : etherproto_item optnl { $$ = $1; } 3348 | etherproto_list comma etherproto_item optnl { 3349 $1->tail->next = $3; 3350 $1->tail = $3; 3351 $$ = $1; 3352 } 3353 ; 3354 3355 etherproto_item : etherprotoval { 3356 u_int16_t pr; 3357 3358 pr = (u_int16_t)$1; 3359 if (pr == 0) { 3360 yyerror("proto 0 cannot be used"); 3361 YYERROR; 3362 } 3363 $$ = calloc(1, sizeof(struct node_proto)); 3364 if ($$ == NULL) 3365 err(1, "proto_item: calloc"); 3366 $$->proto = pr; 3367 $$->next = NULL; 3368 $$->tail = $$; 3369 } 3370 ; 3371 3372 etherprotoval : NUMBER { 3373 if ($1 < 0 || $1 > 65565) { 3374 yyerror("protocol outside range"); 3375 YYERROR; 3376 } 3377 } 3378 | STRING 3379 { 3380 if (!strncmp($1, "0x", 2)) { 3381 if (sscanf($1, "0x%4x", &$$) != 1) { 3382 free($1); 3383 yyerror("invalid EtherType hex"); 3384 YYERROR; 3385 } 3386 } else { 3387 yyerror("Symbolic EtherType not yet supported"); 3388 } 3389 } 3390 ; 3391 3392 proto : /* empty */ { $$ = NULL; } 3393 | PROTO proto_item { $$ = $2; } 3394 | PROTO '{' optnl proto_list '}' { $$ = $4; } 3395 ; 3396 3397 proto_list : proto_item optnl { $$ = $1; } 3398 | proto_list comma proto_item optnl { 3399 $1->tail->next = $3; 3400 $1->tail = $3; 3401 $$ = $1; 3402 } 3403 ; 3404 3405 proto_item : protoval { 3406 u_int8_t pr; 3407 3408 pr = (u_int8_t)$1; 3409 if (pr == 0) { 3410 yyerror("proto 0 cannot be used"); 3411 YYERROR; 3412 } 3413 $$ = calloc(1, sizeof(struct node_proto)); 3414 if ($$ == NULL) 3415 err(1, "proto_item: calloc"); 3416 $$->proto = pr; 3417 $$->next = NULL; 3418 $$->tail = $$; 3419 } 3420 ; 3421 3422 protoval : STRING { 3423 struct protoent *p; 3424 3425 p = getprotobyname($1); 3426 if (p == NULL) { 3427 yyerror("unknown protocol %s", $1); 3428 free($1); 3429 YYERROR; 3430 } 3431 $$ = p->p_proto; 3432 free($1); 3433 } 3434 | NUMBER { 3435 if ($1 < 0 || $1 > 255) { 3436 yyerror("protocol outside range"); 3437 YYERROR; 3438 } 3439 } 3440 ; 3441 3442 l3fromto : /* empty */ { 3443 bzero(&$$, sizeof($$)); 3444 } 3445 | L3 fromto { 3446 if ($2.src.host != NULL && 3447 $2.src.host->addr.type != PF_ADDR_ADDRMASK && 3448 $2.src.host->addr.type != PF_ADDR_TABLE) { 3449 yyerror("from must be an address or table"); 3450 YYERROR; 3451 } 3452 if ($2.dst.host != NULL && 3453 $2.dst.host->addr.type != PF_ADDR_ADDRMASK && 3454 $2.dst.host->addr.type != PF_ADDR_TABLE) { 3455 yyerror("to must be an address or table"); 3456 YYERROR; 3457 } 3458 $$ = $2; 3459 } 3460 ; 3461 etherfromto : ALL { 3462 $$.src = NULL; 3463 $$.dst = NULL; 3464 } 3465 | etherfrom etherto { 3466 $$.src = $1.mac; 3467 $$.dst = $2.mac; 3468 } 3469 ; 3470 3471 etherfrom : /* emtpy */ { 3472 bzero(&$$, sizeof($$)); 3473 } 3474 | FROM macspec { 3475 $$.mac = $2; 3476 } 3477 ; 3478 3479 etherto : /* empty */ { 3480 bzero(&$$, sizeof($$)); 3481 } 3482 | TO macspec { 3483 $$.mac = $2; 3484 } 3485 ; 3486 3487 mac : string '/' NUMBER { 3488 $$ = node_mac_from_string_masklen($1, $3); 3489 free($1); 3490 if ($$ == NULL) 3491 YYERROR; 3492 } 3493 | string { 3494 if (strchr($1, '&')) { 3495 /* mac&mask */ 3496 char *mac = strtok($1, "&"); 3497 char *mask = strtok(NULL, "&"); 3498 $$ = node_mac_from_string_mask(mac, mask); 3499 } else { 3500 $$ = node_mac_from_string($1); 3501 } 3502 free($1); 3503 if ($$ == NULL) 3504 YYERROR; 3505 3506 } 3507 xmac : not mac { 3508 struct node_mac *n; 3509 3510 for (n = $2; n != NULL; n = n->next) 3511 n->neg = $1; 3512 $$ = $2; 3513 } 3514 ; 3515 macspec : xmac { 3516 $$ = $1; 3517 } 3518 | '{' optnl mac_list '}' 3519 { 3520 $$ = $3; 3521 } 3522 ; 3523 mac_list : xmac optnl { 3524 $$ = $1; 3525 } 3526 | mac_list comma xmac { 3527 if ($3 == NULL) 3528 $$ = $1; 3529 else if ($1 == NULL) 3530 $$ = $3; 3531 else { 3532 $1->tail->next = $3; 3533 $1->tail = $3->tail; 3534 $$ = $1; 3535 } 3536 } 3537 3538 fromto : ALL { 3539 $$.src.host = NULL; 3540 $$.src.port = NULL; 3541 $$.dst.host = NULL; 3542 $$.dst.port = NULL; 3543 $$.src_os = NULL; 3544 } 3545 | from os to { 3546 $$.src = $1; 3547 $$.src_os = $2; 3548 $$.dst = $3; 3549 } 3550 ; 3551 3552 os : /* empty */ { $$ = NULL; } 3553 | OS xos { $$ = $2; } 3554 | OS '{' optnl os_list '}' { $$ = $4; } 3555 ; 3556 3557 xos : STRING { 3558 $$ = calloc(1, sizeof(struct node_os)); 3559 if ($$ == NULL) 3560 err(1, "os: calloc"); 3561 $$->os = $1; 3562 $$->tail = $$; 3563 } 3564 ; 3565 3566 os_list : xos optnl { $$ = $1; } 3567 | os_list comma xos optnl { 3568 $1->tail->next = $3; 3569 $1->tail = $3; 3570 $$ = $1; 3571 } 3572 ; 3573 3574 from : /* empty */ { 3575 $$.host = NULL; 3576 $$.port = NULL; 3577 } 3578 | FROM ipportspec { 3579 $$ = $2; 3580 } 3581 ; 3582 3583 to : /* empty */ { 3584 $$.host = NULL; 3585 $$.port = NULL; 3586 } 3587 | TO ipportspec { 3588 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is " 3589 "not permitted in a destination address")) 3590 YYERROR; 3591 $$ = $2; 3592 } 3593 ; 3594 3595 ipportspec : ipspec { 3596 $$.host = $1; 3597 $$.port = NULL; 3598 } 3599 | ipspec PORT portspec { 3600 $$.host = $1; 3601 $$.port = $3; 3602 } 3603 | PORT portspec { 3604 $$.host = NULL; 3605 $$.port = $2; 3606 } 3607 ; 3608 3609 optnl : '\n' optnl 3610 | 3611 ; 3612 3613 ipspec : ANY { $$ = NULL; } 3614 | xhost { $$ = $1; } 3615 | '{' optnl host_list '}' { $$ = $3; } 3616 ; 3617 3618 toipspec : TO ipspec { $$ = $2; } 3619 | /* empty */ { $$ = NULL; } 3620 ; 3621 3622 host_list : ipspec optnl { $$ = $1; } 3623 | host_list comma ipspec optnl { 3624 if ($1 == NULL) { 3625 freehostlist($3); 3626 $$ = $1; 3627 } else if ($3 == NULL) { 3628 freehostlist($1); 3629 $$ = $3; 3630 } else { 3631 $1->tail->next = $3; 3632 $1->tail = $3->tail; 3633 $$ = $1; 3634 } 3635 } 3636 ; 3637 3638 xhost : not host { 3639 struct node_host *n; 3640 3641 for (n = $2; n != NULL; n = n->next) 3642 n->not = $1; 3643 $$ = $2; 3644 } 3645 | not NOROUTE { 3646 $$ = calloc(1, sizeof(struct node_host)); 3647 if ($$ == NULL) 3648 err(1, "xhost: calloc"); 3649 $$->addr.type = PF_ADDR_NOROUTE; 3650 $$->next = NULL; 3651 $$->not = $1; 3652 $$->tail = $$; 3653 } 3654 | not URPFFAILED { 3655 $$ = calloc(1, sizeof(struct node_host)); 3656 if ($$ == NULL) 3657 err(1, "xhost: calloc"); 3658 $$->addr.type = PF_ADDR_URPFFAILED; 3659 $$->next = NULL; 3660 $$->not = $1; 3661 $$->tail = $$; 3662 } 3663 ; 3664 3665 host : STRING { 3666 if (($$ = host($1)) == NULL) { 3667 /* error. "any" is handled elsewhere */ 3668 free($1); 3669 yyerror("could not parse host specification"); 3670 YYERROR; 3671 } 3672 free($1); 3673 3674 } 3675 | STRING '-' STRING { 3676 struct node_host *b, *e; 3677 3678 if ((b = host($1)) == NULL || (e = host($3)) == NULL) { 3679 free($1); 3680 free($3); 3681 yyerror("could not parse host specification"); 3682 YYERROR; 3683 } 3684 if (b->af != e->af || 3685 b->addr.type != PF_ADDR_ADDRMASK || 3686 e->addr.type != PF_ADDR_ADDRMASK || 3687 unmask(&b->addr.v.a.mask, b->af) != 3688 (b->af == AF_INET ? 32 : 128) || 3689 unmask(&e->addr.v.a.mask, e->af) != 3690 (e->af == AF_INET ? 32 : 128) || 3691 b->next != NULL || b->not || 3692 e->next != NULL || e->not) { 3693 free(b); 3694 free(e); 3695 free($1); 3696 free($3); 3697 yyerror("invalid address range"); 3698 YYERROR; 3699 } 3700 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr, 3701 sizeof(b->addr.v.a.mask)); 3702 b->addr.type = PF_ADDR_RANGE; 3703 $$ = b; 3704 free(e); 3705 free($1); 3706 free($3); 3707 } 3708 | STRING '/' NUMBER { 3709 char *buf; 3710 3711 if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1) 3712 err(1, "host: asprintf"); 3713 free($1); 3714 if (($$ = host(buf)) == NULL) { 3715 /* error. "any" is handled elsewhere */ 3716 free(buf); 3717 yyerror("could not parse host specification"); 3718 YYERROR; 3719 } 3720 free(buf); 3721 } 3722 | NUMBER '/' NUMBER { 3723 char *buf; 3724 3725 /* ie. for 10/8 parsing */ 3726 #ifdef __FreeBSD__ 3727 if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1) 3728 #else 3729 if (asprintf(&buf, "%lld/%lld", $1, $3) == -1) 3730 #endif 3731 err(1, "host: asprintf"); 3732 if (($$ = host(buf)) == NULL) { 3733 /* error. "any" is handled elsewhere */ 3734 free(buf); 3735 yyerror("could not parse host specification"); 3736 YYERROR; 3737 } 3738 free(buf); 3739 } 3740 | dynaddr 3741 | dynaddr '/' NUMBER { 3742 struct node_host *n; 3743 3744 if ($3 < 0 || $3 > 128) { 3745 yyerror("bit number too big"); 3746 YYERROR; 3747 } 3748 $$ = $1; 3749 for (n = $1; n != NULL; n = n->next) 3750 set_ipmask(n, $3); 3751 } 3752 | '<' STRING '>' { 3753 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 3754 yyerror("table name '%s' too long", $2); 3755 free($2); 3756 YYERROR; 3757 } 3758 $$ = calloc(1, sizeof(struct node_host)); 3759 if ($$ == NULL) 3760 err(1, "host: calloc"); 3761 $$->addr.type = PF_ADDR_TABLE; 3762 if (strlcpy($$->addr.v.tblname, $2, 3763 sizeof($$->addr.v.tblname)) >= 3764 sizeof($$->addr.v.tblname)) 3765 errx(1, "host: strlcpy"); 3766 free($2); 3767 $$->next = NULL; 3768 $$->tail = $$; 3769 } 3770 ; 3771 3772 number : NUMBER 3773 | STRING { 3774 u_long ulval; 3775 3776 if (atoul($1, &ulval) == -1) { 3777 yyerror("%s is not a number", $1); 3778 free($1); 3779 YYERROR; 3780 } else 3781 $$ = ulval; 3782 free($1); 3783 } 3784 ; 3785 3786 dynaddr : '(' STRING ')' { 3787 int flags = 0; 3788 char *p, *op; 3789 3790 op = $2; 3791 if (!isalpha(op[0])) { 3792 yyerror("invalid interface name '%s'", op); 3793 free(op); 3794 YYERROR; 3795 } 3796 while ((p = strrchr($2, ':')) != NULL) { 3797 if (!strcmp(p+1, "network")) 3798 flags |= PFI_AFLAG_NETWORK; 3799 else if (!strcmp(p+1, "broadcast")) 3800 flags |= PFI_AFLAG_BROADCAST; 3801 else if (!strcmp(p+1, "peer")) 3802 flags |= PFI_AFLAG_PEER; 3803 else if (!strcmp(p+1, "0")) 3804 flags |= PFI_AFLAG_NOALIAS; 3805 else { 3806 yyerror("interface %s has bad modifier", 3807 $2); 3808 free(op); 3809 YYERROR; 3810 } 3811 *p = '\0'; 3812 } 3813 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { 3814 free(op); 3815 yyerror("illegal combination of " 3816 "interface modifiers"); 3817 YYERROR; 3818 } 3819 $$ = calloc(1, sizeof(struct node_host)); 3820 if ($$ == NULL) 3821 err(1, "address: calloc"); 3822 $$->af = 0; 3823 set_ipmask($$, 128); 3824 $$->addr.type = PF_ADDR_DYNIFTL; 3825 $$->addr.iflags = flags; 3826 if (strlcpy($$->addr.v.ifname, $2, 3827 sizeof($$->addr.v.ifname)) >= 3828 sizeof($$->addr.v.ifname)) { 3829 free(op); 3830 free($$); 3831 yyerror("interface name too long"); 3832 YYERROR; 3833 } 3834 free(op); 3835 $$->next = NULL; 3836 $$->tail = $$; 3837 } 3838 ; 3839 3840 portspec : port_item { $$ = $1; } 3841 | '{' optnl port_list '}' { $$ = $3; } 3842 ; 3843 3844 port_list : port_item optnl { $$ = $1; } 3845 | port_list comma port_item optnl { 3846 $1->tail->next = $3; 3847 $1->tail = $3; 3848 $$ = $1; 3849 } 3850 ; 3851 3852 port_item : portrange { 3853 $$ = calloc(1, sizeof(struct node_port)); 3854 if ($$ == NULL) 3855 err(1, "port_item: calloc"); 3856 $$->port[0] = $1.a; 3857 $$->port[1] = $1.b; 3858 if ($1.t) 3859 $$->op = PF_OP_RRG; 3860 else 3861 $$->op = PF_OP_EQ; 3862 $$->next = NULL; 3863 $$->tail = $$; 3864 } 3865 | unaryop portrange { 3866 if ($2.t) { 3867 yyerror("':' cannot be used with an other " 3868 "port operator"); 3869 YYERROR; 3870 } 3871 $$ = calloc(1, sizeof(struct node_port)); 3872 if ($$ == NULL) 3873 err(1, "port_item: calloc"); 3874 $$->port[0] = $2.a; 3875 $$->port[1] = $2.b; 3876 $$->op = $1; 3877 $$->next = NULL; 3878 $$->tail = $$; 3879 } 3880 | portrange PORTBINARY portrange { 3881 if ($1.t || $3.t) { 3882 yyerror("':' cannot be used with an other " 3883 "port operator"); 3884 YYERROR; 3885 } 3886 $$ = calloc(1, sizeof(struct node_port)); 3887 if ($$ == NULL) 3888 err(1, "port_item: calloc"); 3889 $$->port[0] = $1.a; 3890 $$->port[1] = $3.a; 3891 $$->op = $2; 3892 $$->next = NULL; 3893 $$->tail = $$; 3894 } 3895 ; 3896 3897 portplain : numberstring { 3898 if (parseport($1, &$$, 0) == -1) { 3899 free($1); 3900 YYERROR; 3901 } 3902 free($1); 3903 } 3904 ; 3905 3906 portrange : numberstring { 3907 if (parseport($1, &$$, PPORT_RANGE) == -1) { 3908 free($1); 3909 YYERROR; 3910 } 3911 free($1); 3912 } 3913 ; 3914 3915 uids : uid_item { $$ = $1; } 3916 | '{' optnl uid_list '}' { $$ = $3; } 3917 ; 3918 3919 uid_list : uid_item optnl { $$ = $1; } 3920 | uid_list comma uid_item optnl { 3921 $1->tail->next = $3; 3922 $1->tail = $3; 3923 $$ = $1; 3924 } 3925 ; 3926 3927 uid_item : uid { 3928 $$ = calloc(1, sizeof(struct node_uid)); 3929 if ($$ == NULL) 3930 err(1, "uid_item: calloc"); 3931 $$->uid[0] = $1; 3932 $$->uid[1] = $1; 3933 $$->op = PF_OP_EQ; 3934 $$->next = NULL; 3935 $$->tail = $$; 3936 } 3937 | unaryop uid { 3938 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3939 yyerror("user unknown requires operator = or " 3940 "!="); 3941 YYERROR; 3942 } 3943 $$ = calloc(1, sizeof(struct node_uid)); 3944 if ($$ == NULL) 3945 err(1, "uid_item: calloc"); 3946 $$->uid[0] = $2; 3947 $$->uid[1] = $2; 3948 $$->op = $1; 3949 $$->next = NULL; 3950 $$->tail = $$; 3951 } 3952 | uid PORTBINARY uid { 3953 if ($1 == UID_MAX || $3 == UID_MAX) { 3954 yyerror("user unknown requires operator = or " 3955 "!="); 3956 YYERROR; 3957 } 3958 $$ = calloc(1, sizeof(struct node_uid)); 3959 if ($$ == NULL) 3960 err(1, "uid_item: calloc"); 3961 $$->uid[0] = $1; 3962 $$->uid[1] = $3; 3963 $$->op = $2; 3964 $$->next = NULL; 3965 $$->tail = $$; 3966 } 3967 ; 3968 3969 uid : STRING { 3970 if (!strcmp($1, "unknown")) 3971 $$ = UID_MAX; 3972 else { 3973 struct passwd *pw; 3974 3975 if ((pw = getpwnam($1)) == NULL) { 3976 yyerror("unknown user %s", $1); 3977 free($1); 3978 YYERROR; 3979 } 3980 $$ = pw->pw_uid; 3981 } 3982 free($1); 3983 } 3984 | NUMBER { 3985 if ($1 < 0 || $1 >= UID_MAX) { 3986 yyerror("illegal uid value %lu", $1); 3987 YYERROR; 3988 } 3989 $$ = $1; 3990 } 3991 ; 3992 3993 gids : gid_item { $$ = $1; } 3994 | '{' optnl gid_list '}' { $$ = $3; } 3995 ; 3996 3997 gid_list : gid_item optnl { $$ = $1; } 3998 | gid_list comma gid_item optnl { 3999 $1->tail->next = $3; 4000 $1->tail = $3; 4001 $$ = $1; 4002 } 4003 ; 4004 4005 gid_item : gid { 4006 $$ = calloc(1, sizeof(struct node_gid)); 4007 if ($$ == NULL) 4008 err(1, "gid_item: calloc"); 4009 $$->gid[0] = $1; 4010 $$->gid[1] = $1; 4011 $$->op = PF_OP_EQ; 4012 $$->next = NULL; 4013 $$->tail = $$; 4014 } 4015 | unaryop gid { 4016 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 4017 yyerror("group unknown requires operator = or " 4018 "!="); 4019 YYERROR; 4020 } 4021 $$ = calloc(1, sizeof(struct node_gid)); 4022 if ($$ == NULL) 4023 err(1, "gid_item: calloc"); 4024 $$->gid[0] = $2; 4025 $$->gid[1] = $2; 4026 $$->op = $1; 4027 $$->next = NULL; 4028 $$->tail = $$; 4029 } 4030 | gid PORTBINARY gid { 4031 if ($1 == GID_MAX || $3 == GID_MAX) { 4032 yyerror("group unknown requires operator = or " 4033 "!="); 4034 YYERROR; 4035 } 4036 $$ = calloc(1, sizeof(struct node_gid)); 4037 if ($$ == NULL) 4038 err(1, "gid_item: calloc"); 4039 $$->gid[0] = $1; 4040 $$->gid[1] = $3; 4041 $$->op = $2; 4042 $$->next = NULL; 4043 $$->tail = $$; 4044 } 4045 ; 4046 4047 gid : STRING { 4048 if (!strcmp($1, "unknown")) 4049 $$ = GID_MAX; 4050 else { 4051 struct group *grp; 4052 4053 if ((grp = getgrnam($1)) == NULL) { 4054 yyerror("unknown group %s", $1); 4055 free($1); 4056 YYERROR; 4057 } 4058 $$ = grp->gr_gid; 4059 } 4060 free($1); 4061 } 4062 | NUMBER { 4063 if ($1 < 0 || $1 >= GID_MAX) { 4064 yyerror("illegal gid value %lu", $1); 4065 YYERROR; 4066 } 4067 $$ = $1; 4068 } 4069 ; 4070 4071 flag : STRING { 4072 int f; 4073 4074 if ((f = parse_flags($1)) < 0) { 4075 yyerror("bad flags %s", $1); 4076 free($1); 4077 YYERROR; 4078 } 4079 free($1); 4080 $$.b1 = f; 4081 } 4082 ; 4083 4084 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 4085 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 4086 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; } 4087 ; 4088 4089 icmpspec : ICMPTYPE icmp_item { $$ = $2; } 4090 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; } 4091 | ICMP6TYPE icmp6_item { $$ = $2; } 4092 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; } 4093 ; 4094 4095 icmp_list : icmp_item optnl { $$ = $1; } 4096 | icmp_list comma icmp_item optnl { 4097 $1->tail->next = $3; 4098 $1->tail = $3; 4099 $$ = $1; 4100 } 4101 ; 4102 4103 icmp6_list : icmp6_item optnl { $$ = $1; } 4104 | icmp6_list comma icmp6_item optnl { 4105 $1->tail->next = $3; 4106 $1->tail = $3; 4107 $$ = $1; 4108 } 4109 ; 4110 4111 icmp_item : icmptype { 4112 $$ = calloc(1, sizeof(struct node_icmp)); 4113 if ($$ == NULL) 4114 err(1, "icmp_item: calloc"); 4115 $$->type = $1; 4116 $$->code = 0; 4117 $$->proto = IPPROTO_ICMP; 4118 $$->next = NULL; 4119 $$->tail = $$; 4120 } 4121 | icmptype CODE STRING { 4122 const struct icmpcodeent *p; 4123 4124 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) { 4125 yyerror("unknown icmp-code %s", $3); 4126 free($3); 4127 YYERROR; 4128 } 4129 4130 free($3); 4131 $$ = calloc(1, sizeof(struct node_icmp)); 4132 if ($$ == NULL) 4133 err(1, "icmp_item: calloc"); 4134 $$->type = $1; 4135 $$->code = p->code + 1; 4136 $$->proto = IPPROTO_ICMP; 4137 $$->next = NULL; 4138 $$->tail = $$; 4139 } 4140 | icmptype CODE NUMBER { 4141 if ($3 < 0 || $3 > 255) { 4142 yyerror("illegal icmp-code %lu", $3); 4143 YYERROR; 4144 } 4145 $$ = calloc(1, sizeof(struct node_icmp)); 4146 if ($$ == NULL) 4147 err(1, "icmp_item: calloc"); 4148 $$->type = $1; 4149 $$->code = $3 + 1; 4150 $$->proto = IPPROTO_ICMP; 4151 $$->next = NULL; 4152 $$->tail = $$; 4153 } 4154 ; 4155 4156 icmp6_item : icmp6type { 4157 $$ = calloc(1, sizeof(struct node_icmp)); 4158 if ($$ == NULL) 4159 err(1, "icmp_item: calloc"); 4160 $$->type = $1; 4161 $$->code = 0; 4162 $$->proto = IPPROTO_ICMPV6; 4163 $$->next = NULL; 4164 $$->tail = $$; 4165 } 4166 | icmp6type CODE STRING { 4167 const struct icmpcodeent *p; 4168 4169 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) { 4170 yyerror("unknown icmp6-code %s", $3); 4171 free($3); 4172 YYERROR; 4173 } 4174 free($3); 4175 4176 $$ = calloc(1, sizeof(struct node_icmp)); 4177 if ($$ == NULL) 4178 err(1, "icmp_item: calloc"); 4179 $$->type = $1; 4180 $$->code = p->code + 1; 4181 $$->proto = IPPROTO_ICMPV6; 4182 $$->next = NULL; 4183 $$->tail = $$; 4184 } 4185 | icmp6type CODE NUMBER { 4186 if ($3 < 0 || $3 > 255) { 4187 yyerror("illegal icmp-code %lu", $3); 4188 YYERROR; 4189 } 4190 $$ = calloc(1, sizeof(struct node_icmp)); 4191 if ($$ == NULL) 4192 err(1, "icmp_item: calloc"); 4193 $$->type = $1; 4194 $$->code = $3 + 1; 4195 $$->proto = IPPROTO_ICMPV6; 4196 $$->next = NULL; 4197 $$->tail = $$; 4198 } 4199 ; 4200 4201 icmptype : STRING { 4202 const struct icmptypeent *p; 4203 4204 if ((p = geticmptypebyname($1, AF_INET)) == NULL) { 4205 yyerror("unknown icmp-type %s", $1); 4206 free($1); 4207 YYERROR; 4208 } 4209 $$ = p->type + 1; 4210 free($1); 4211 } 4212 | NUMBER { 4213 if ($1 < 0 || $1 > 255) { 4214 yyerror("illegal icmp-type %lu", $1); 4215 YYERROR; 4216 } 4217 $$ = $1 + 1; 4218 } 4219 ; 4220 4221 icmp6type : STRING { 4222 const struct icmptypeent *p; 4223 4224 if ((p = geticmptypebyname($1, AF_INET6)) == 4225 NULL) { 4226 yyerror("unknown icmp6-type %s", $1); 4227 free($1); 4228 YYERROR; 4229 } 4230 $$ = p->type + 1; 4231 free($1); 4232 } 4233 | NUMBER { 4234 if ($1 < 0 || $1 > 255) { 4235 yyerror("illegal icmp6-type %lu", $1); 4236 YYERROR; 4237 } 4238 $$ = $1 + 1; 4239 } 4240 ; 4241 4242 tos : STRING { 4243 int val; 4244 char *end; 4245 4246 if (map_tos($1, &val)) 4247 $$ = val; 4248 else if ($1[0] == '0' && $1[1] == 'x') { 4249 errno = 0; 4250 $$ = strtoul($1, &end, 16); 4251 if (errno || *end != '\0') 4252 $$ = 256; 4253 } else 4254 $$ = 256; /* flag bad argument */ 4255 if ($$ < 0 || $$ > 255) { 4256 yyerror("illegal tos value %s", $1); 4257 free($1); 4258 YYERROR; 4259 } 4260 free($1); 4261 } 4262 | NUMBER { 4263 $$ = $1; 4264 if ($$ < 0 || $$ > 255) { 4265 yyerror("illegal tos value %lu", $1); 4266 YYERROR; 4267 } 4268 } 4269 ; 4270 4271 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; } 4272 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; } 4273 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; } 4274 ; 4275 4276 statelock : IFBOUND { 4277 $$ = PFRULE_IFBOUND; 4278 } 4279 | FLOATING { 4280 $$ = 0; 4281 } 4282 ; 4283 4284 keep : NO STATE { 4285 $$.action = 0; 4286 $$.options = NULL; 4287 } 4288 | KEEP STATE state_opt_spec { 4289 $$.action = PF_STATE_NORMAL; 4290 $$.options = $3; 4291 } 4292 | MODULATE STATE state_opt_spec { 4293 $$.action = PF_STATE_MODULATE; 4294 $$.options = $3; 4295 } 4296 | SYNPROXY STATE state_opt_spec { 4297 $$.action = PF_STATE_SYNPROXY; 4298 $$.options = $3; 4299 } 4300 ; 4301 4302 flush : /* empty */ { $$ = 0; } 4303 | FLUSH { $$ = PF_FLUSH; } 4304 | FLUSH GLOBAL { 4305 $$ = PF_FLUSH | PF_FLUSH_GLOBAL; 4306 } 4307 ; 4308 4309 state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 4310 | /* empty */ { $$ = NULL; } 4311 ; 4312 4313 state_opt_list : state_opt_item { $$ = $1; } 4314 | state_opt_list comma state_opt_item { 4315 $1->tail->next = $3; 4316 $1->tail = $3; 4317 $$ = $1; 4318 } 4319 ; 4320 4321 state_opt_item : MAXIMUM NUMBER { 4322 if ($2 < 0 || $2 > UINT_MAX) { 4323 yyerror("only positive values permitted"); 4324 YYERROR; 4325 } 4326 $$ = calloc(1, sizeof(struct node_state_opt)); 4327 if ($$ == NULL) 4328 err(1, "state_opt_item: calloc"); 4329 $$->type = PF_STATE_OPT_MAX; 4330 $$->data.max_states = $2; 4331 $$->next = NULL; 4332 $$->tail = $$; 4333 } 4334 | NOSYNC { 4335 $$ = calloc(1, sizeof(struct node_state_opt)); 4336 if ($$ == NULL) 4337 err(1, "state_opt_item: calloc"); 4338 $$->type = PF_STATE_OPT_NOSYNC; 4339 $$->next = NULL; 4340 $$->tail = $$; 4341 } 4342 | MAXSRCSTATES NUMBER { 4343 if ($2 < 0 || $2 > UINT_MAX) { 4344 yyerror("only positive values permitted"); 4345 YYERROR; 4346 } 4347 $$ = calloc(1, sizeof(struct node_state_opt)); 4348 if ($$ == NULL) 4349 err(1, "state_opt_item: calloc"); 4350 $$->type = PF_STATE_OPT_MAX_SRC_STATES; 4351 $$->data.max_src_states = $2; 4352 $$->next = NULL; 4353 $$->tail = $$; 4354 } 4355 | MAXSRCCONN NUMBER { 4356 if ($2 < 0 || $2 > UINT_MAX) { 4357 yyerror("only positive values permitted"); 4358 YYERROR; 4359 } 4360 $$ = calloc(1, sizeof(struct node_state_opt)); 4361 if ($$ == NULL) 4362 err(1, "state_opt_item: calloc"); 4363 $$->type = PF_STATE_OPT_MAX_SRC_CONN; 4364 $$->data.max_src_conn = $2; 4365 $$->next = NULL; 4366 $$->tail = $$; 4367 } 4368 | MAXSRCCONNRATE NUMBER '/' NUMBER { 4369 if ($2 < 0 || $2 > UINT_MAX || 4370 $4 < 0 || $4 > UINT_MAX) { 4371 yyerror("only positive values permitted"); 4372 YYERROR; 4373 } 4374 $$ = calloc(1, sizeof(struct node_state_opt)); 4375 if ($$ == NULL) 4376 err(1, "state_opt_item: calloc"); 4377 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE; 4378 $$->data.max_src_conn_rate.limit = $2; 4379 $$->data.max_src_conn_rate.seconds = $4; 4380 $$->next = NULL; 4381 $$->tail = $$; 4382 } 4383 | OVERLOAD '<' STRING '>' flush { 4384 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 4385 yyerror("table name '%s' too long", $3); 4386 free($3); 4387 YYERROR; 4388 } 4389 $$ = calloc(1, sizeof(struct node_state_opt)); 4390 if ($$ == NULL) 4391 err(1, "state_opt_item: calloc"); 4392 if (strlcpy($$->data.overload.tblname, $3, 4393 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE) 4394 errx(1, "state_opt_item: strlcpy"); 4395 free($3); 4396 $$->type = PF_STATE_OPT_OVERLOAD; 4397 $$->data.overload.flush = $5; 4398 $$->next = NULL; 4399 $$->tail = $$; 4400 } 4401 | MAXSRCNODES NUMBER { 4402 if ($2 < 0 || $2 > UINT_MAX) { 4403 yyerror("only positive values permitted"); 4404 YYERROR; 4405 } 4406 $$ = calloc(1, sizeof(struct node_state_opt)); 4407 if ($$ == NULL) 4408 err(1, "state_opt_item: calloc"); 4409 $$->type = PF_STATE_OPT_MAX_SRC_NODES; 4410 $$->data.max_src_nodes = $2; 4411 $$->next = NULL; 4412 $$->tail = $$; 4413 } 4414 | sourcetrack { 4415 $$ = calloc(1, sizeof(struct node_state_opt)); 4416 if ($$ == NULL) 4417 err(1, "state_opt_item: calloc"); 4418 $$->type = PF_STATE_OPT_SRCTRACK; 4419 $$->data.src_track = $1; 4420 $$->next = NULL; 4421 $$->tail = $$; 4422 } 4423 | statelock { 4424 $$ = calloc(1, sizeof(struct node_state_opt)); 4425 if ($$ == NULL) 4426 err(1, "state_opt_item: calloc"); 4427 $$->type = PF_STATE_OPT_STATELOCK; 4428 $$->data.statelock = $1; 4429 $$->next = NULL; 4430 $$->tail = $$; 4431 } 4432 | SLOPPY { 4433 $$ = calloc(1, sizeof(struct node_state_opt)); 4434 if ($$ == NULL) 4435 err(1, "state_opt_item: calloc"); 4436 $$->type = PF_STATE_OPT_SLOPPY; 4437 $$->next = NULL; 4438 $$->tail = $$; 4439 } 4440 | PFLOW { 4441 $$ = calloc(1, sizeof(struct node_state_opt)); 4442 if ($$ == NULL) 4443 err(1, "state_opt_item: calloc"); 4444 $$->type = PF_STATE_OPT_PFLOW; 4445 $$->next = NULL; 4446 $$->tail = $$; 4447 } 4448 | ALLOW_RELATED { 4449 $$ = calloc(1, sizeof(struct node_state_opt)); 4450 if ($$ == NULL) 4451 err(1, "state_opt_item: calloc"); 4452 $$->type = PF_STATE_OPT_ALLOW_RELATED; 4453 $$->next = NULL; 4454 $$->tail = $$; 4455 } 4456 | STRING NUMBER { 4457 int i; 4458 4459 if ($2 < 0 || $2 > UINT_MAX) { 4460 yyerror("only positive values permitted"); 4461 YYERROR; 4462 } 4463 for (i = 0; pf_timeouts[i].name && 4464 strcmp(pf_timeouts[i].name, $1); ++i) 4465 ; /* nothing */ 4466 if (!pf_timeouts[i].name) { 4467 yyerror("illegal timeout name %s", $1); 4468 free($1); 4469 YYERROR; 4470 } 4471 if (strchr(pf_timeouts[i].name, '.') == NULL) { 4472 yyerror("illegal state timeout %s", $1); 4473 free($1); 4474 YYERROR; 4475 } 4476 free($1); 4477 $$ = calloc(1, sizeof(struct node_state_opt)); 4478 if ($$ == NULL) 4479 err(1, "state_opt_item: calloc"); 4480 $$->type = PF_STATE_OPT_TIMEOUT; 4481 $$->data.timeout.number = pf_timeouts[i].timeout; 4482 $$->data.timeout.seconds = $2; 4483 $$->next = NULL; 4484 $$->tail = $$; 4485 } 4486 ; 4487 4488 label : LABEL STRING { 4489 $$ = $2; 4490 } 4491 ; 4492 4493 etherqname : QUEUE STRING { 4494 $$.qname = $2; 4495 } 4496 | QUEUE '(' STRING ')' { 4497 $$.qname = $3; 4498 } 4499 ; 4500 4501 qname : QUEUE STRING { 4502 $$.qname = $2; 4503 $$.pqname = NULL; 4504 } 4505 | QUEUE '(' STRING ')' { 4506 $$.qname = $3; 4507 $$.pqname = NULL; 4508 } 4509 | QUEUE '(' STRING comma STRING ')' { 4510 $$.qname = $3; 4511 $$.pqname = $5; 4512 } 4513 ; 4514 4515 no : /* empty */ { $$ = 0; } 4516 | NO { $$ = 1; } 4517 ; 4518 4519 portstar : numberstring { 4520 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) { 4521 free($1); 4522 YYERROR; 4523 } 4524 free($1); 4525 } 4526 ; 4527 4528 redir_host : host { $$ = $1; } 4529 | '{' optnl redir_host_list '}' { $$ = $3; } 4530 ; 4531 4532 redir_host_list : host optnl { $$ = $1; } 4533 | redir_host_list comma host optnl { 4534 $1->tail->next = $3; 4535 $1->tail = $3->tail; 4536 $$ = $1; 4537 } 4538 ; 4539 4540 /* Redirection without port */ 4541 no_port_redirspec: redir_host pool_opts { 4542 $$ = calloc(1, sizeof(struct redirspec)); 4543 if ($$ == NULL) 4544 err(1, "redirspec: calloc"); 4545 $$->host = $1; 4546 $$->pool_opts = $2; 4547 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4548 } 4549 ; 4550 4551 /* Redirection with optional port */ 4552 port_redirspec : no_port_redirspec; 4553 | redir_host PORT portstar pool_opts { 4554 $$ = calloc(1, sizeof(struct redirspec)); 4555 if ($$ == NULL) 4556 err(1, "redirspec: calloc"); 4557 $$->host = $1; 4558 $$->rport = $3; 4559 $$->pool_opts = $4; 4560 } 4561 4562 /* Redirection with an arrow and an optional port: FreeBSD NAT rules */ 4563 nat_redirspec : /* empty */ { $$ = NULL; } 4564 | ARROW port_redirspec { 4565 $$ = $2; 4566 } 4567 ; 4568 4569 /* Redirection with interfaces and without ports: route-to rules */ 4570 route_redirspec : routespec pool_opts { 4571 $$ = calloc(1, sizeof(struct redirspec)); 4572 if ($$ == NULL) 4573 err(1, "redirspec: calloc"); 4574 $$->host = $1; 4575 $$->pool_opts = $2; 4576 } 4577 ; 4578 4579 hashkey : /* empty */ 4580 { 4581 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4582 if ($$ == NULL) 4583 err(1, "hashkey: calloc"); 4584 $$->key32[0] = arc4random(); 4585 $$->key32[1] = arc4random(); 4586 $$->key32[2] = arc4random(); 4587 $$->key32[3] = arc4random(); 4588 } 4589 | string 4590 { 4591 if (!strncmp($1, "0x", 2)) { 4592 if (strlen($1) != 34) { 4593 free($1); 4594 yyerror("hex key must be 128 bits " 4595 "(32 hex digits) long"); 4596 YYERROR; 4597 } 4598 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4599 if ($$ == NULL) 4600 err(1, "hashkey: calloc"); 4601 4602 if (sscanf($1, "0x%8x%8x%8x%8x", 4603 &$$->key32[0], &$$->key32[1], 4604 &$$->key32[2], &$$->key32[3]) != 4) { 4605 free($$); 4606 free($1); 4607 yyerror("invalid hex key"); 4608 YYERROR; 4609 } 4610 } else { 4611 MD5_CTX context; 4612 4613 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4614 if ($$ == NULL) 4615 err(1, "hashkey: calloc"); 4616 MD5Init(&context); 4617 MD5Update(&context, (unsigned char *)$1, 4618 strlen($1)); 4619 MD5Final((unsigned char *)$$, &context); 4620 HTONL($$->key32[0]); 4621 HTONL($$->key32[1]); 4622 HTONL($$->key32[2]); 4623 HTONL($$->key32[3]); 4624 } 4625 free($1); 4626 } 4627 ; 4628 4629 pool_opts : { bzero(&pool_opts, sizeof pool_opts); } 4630 pool_opts_l 4631 { $$ = pool_opts; } 4632 | /* empty */ { 4633 bzero(&pool_opts, sizeof pool_opts); 4634 $$ = pool_opts; 4635 } 4636 ; 4637 4638 pool_opts_l : pool_opts_l pool_opt 4639 | pool_opt 4640 ; 4641 4642 pool_opt : BITMASK { 4643 if (pool_opts.type) { 4644 yyerror("pool type cannot be redefined"); 4645 YYERROR; 4646 } 4647 pool_opts.type = PF_POOL_BITMASK; 4648 } 4649 | RANDOM { 4650 if (pool_opts.type) { 4651 yyerror("pool type cannot be redefined"); 4652 YYERROR; 4653 } 4654 pool_opts.type = PF_POOL_RANDOM; 4655 } 4656 | SOURCEHASH hashkey { 4657 if (pool_opts.type) { 4658 yyerror("pool type cannot be redefined"); 4659 YYERROR; 4660 } 4661 pool_opts.type = PF_POOL_SRCHASH; 4662 pool_opts.key = $2; 4663 } 4664 | ROUNDROBIN { 4665 if (pool_opts.type) { 4666 yyerror("pool type cannot be redefined"); 4667 YYERROR; 4668 } 4669 pool_opts.type = PF_POOL_ROUNDROBIN; 4670 } 4671 | STATICPORT { 4672 if (pool_opts.staticport) { 4673 yyerror("static-port cannot be redefined"); 4674 YYERROR; 4675 } 4676 pool_opts.staticport = 1; 4677 } 4678 | STICKYADDRESS { 4679 if (pool_opts.marker & POM_STICKYADDRESS) { 4680 yyerror("sticky-address cannot be redefined"); 4681 YYERROR; 4682 } 4683 pool_opts.marker |= POM_STICKYADDRESS; 4684 pool_opts.opts |= PF_POOL_STICKYADDR; 4685 } 4686 | ENDPI { 4687 if (pool_opts.marker & POM_ENDPI) { 4688 yyerror("endpoint-independent cannot be redefined"); 4689 YYERROR; 4690 } 4691 pool_opts.marker |= POM_ENDPI; 4692 pool_opts.opts |= PF_POOL_ENDPI; 4693 } 4694 | MAPEPORTSET number '/' number '/' number { 4695 if (pool_opts.mape.offset) { 4696 yyerror("map-e-portset cannot be redefined"); 4697 YYERROR; 4698 } 4699 if (pool_opts.type) { 4700 yyerror("map-e-portset cannot be used with " 4701 "address pools"); 4702 YYERROR; 4703 } 4704 if ($2 <= 0 || $2 >= 16) { 4705 yyerror("MAP-E PSID offset must be 1-15"); 4706 YYERROR; 4707 } 4708 if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) { 4709 yyerror("Invalid MAP-E PSID length"); 4710 YYERROR; 4711 } else if ($4 == 0) { 4712 yyerror("PSID Length = 0: this means" 4713 " you do not need MAP-E"); 4714 YYERROR; 4715 } 4716 if ($6 < 0 || $6 > 65535) { 4717 yyerror("Invalid MAP-E PSID"); 4718 YYERROR; 4719 } 4720 pool_opts.mape.offset = $2; 4721 pool_opts.mape.psidlen = $4; 4722 pool_opts.mape.psid = $6; 4723 } 4724 ; 4725 4726 binat_redirspec : /* empty */ { $$ = NULL; } 4727 | ARROW host { 4728 $$ = calloc(1, sizeof(struct redirspec)); 4729 if ($$ == NULL) 4730 err(1, "redirspec: calloc"); 4731 $$->host = $2; 4732 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4733 } 4734 | ARROW host PORT portstar { 4735 $$ = calloc(1, sizeof(struct redirspec)); 4736 if ($$ == NULL) 4737 err(1, "redirspec: calloc"); 4738 $$->host = $2; 4739 $$->rport = $4; 4740 } 4741 ; 4742 4743 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; } 4744 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; } 4745 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; } 4746 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; } 4747 ; 4748 4749 nataction : no NAT natpasslog { 4750 if ($1 && $3.b1) { 4751 yyerror("\"pass\" not valid with \"no\""); 4752 YYERROR; 4753 } 4754 if ($1) 4755 $$.b1 = PF_NONAT; 4756 else 4757 $$.b1 = PF_NAT; 4758 $$.b2 = $3.b1; 4759 $$.w = $3.b2; 4760 $$.w2 = $3.w2; 4761 } 4762 | no RDR natpasslog { 4763 if ($1 && $3.b1) { 4764 yyerror("\"pass\" not valid with \"no\""); 4765 YYERROR; 4766 } 4767 if ($1) 4768 $$.b1 = PF_NORDR; 4769 else 4770 $$.b1 = PF_RDR; 4771 $$.b2 = $3.b1; 4772 $$.w = $3.b2; 4773 $$.w2 = $3.w2; 4774 } 4775 ; 4776 4777 natrule : nataction interface af proto fromto tag tagged rtable 4778 nat_redirspec 4779 { 4780 struct pfctl_rule r; 4781 struct node_state_opt *o; 4782 4783 if (check_rulestate(PFCTL_STATE_NAT)) 4784 YYERROR; 4785 4786 pfctl_init_rule(&r); 4787 4788 r.action = $1.b1; 4789 r.natpass = $1.b2; 4790 r.log = $1.w; 4791 r.logif = $1.w2; 4792 r.af = $3; 4793 4794 if (!r.af) { 4795 if ($5.src.host && $5.src.host->af && 4796 !$5.src.host->ifindex) 4797 r.af = $5.src.host->af; 4798 else if ($5.dst.host && $5.dst.host->af && 4799 !$5.dst.host->ifindex) 4800 r.af = $5.dst.host->af; 4801 } 4802 4803 if ($6 != NULL) 4804 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >= 4805 PF_TAG_NAME_SIZE) { 4806 yyerror("tag too long, max %u chars", 4807 PF_TAG_NAME_SIZE - 1); 4808 YYERROR; 4809 } 4810 4811 if ($7.name) 4812 if (strlcpy(r.match_tagname, $7.name, 4813 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4814 yyerror("tag too long, max %u chars", 4815 PF_TAG_NAME_SIZE - 1); 4816 YYERROR; 4817 } 4818 r.match_tag_not = $7.neg; 4819 r.rtableid = $8; 4820 4821 if (r.action == PF_NONAT || r.action == PF_NORDR) { 4822 if ($9 != NULL) { 4823 yyerror("translation rule with 'no' " 4824 "does not need '->'"); 4825 YYERROR; 4826 } 4827 } else { 4828 if ($9 == NULL || $9->host == NULL) { 4829 yyerror("translation rule requires '-> " 4830 "address'"); 4831 YYERROR; 4832 } 4833 if (!r.af && ! $9->host->ifindex) 4834 r.af = $9->host->af; 4835 4836 remove_invalid_hosts(&$9->host, &r.af); 4837 if (invalid_redirect($9->host, r.af)) 4838 YYERROR; 4839 if ($9->host->addr.type == PF_ADDR_DYNIFTL) { 4840 if (($9->host = gen_dynnode($9->host, r.af)) == NULL) 4841 err(1, "calloc"); 4842 } 4843 if (check_netmask($9->host, r.af)) 4844 YYERROR; 4845 } 4846 4847 o = keep_state_defaults; 4848 while (o) { 4849 switch (o->type) { 4850 case PF_STATE_OPT_PFLOW: 4851 if (r.rule_flag & PFRULE_PFLOW) { 4852 yyerror("state pflow option: " 4853 "multiple definitions"); 4854 YYERROR; 4855 } 4856 r.rule_flag |= PFRULE_PFLOW; 4857 break; 4858 } 4859 o = o->next; 4860 } 4861 4862 expand_rule(&r, $2, NULL, $9, NULL, $4, 4863 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 4864 $5.dst.port, 0, 0, 0, 0, ""); 4865 } 4866 ; 4867 4868 binatrule : no BINAT natpasslog interface af proto FROM ipspec toipspec tag 4869 tagged rtable binat_redirspec 4870 { 4871 struct pfctl_rule binat; 4872 struct pf_pooladdr *pa; 4873 4874 if (check_rulestate(PFCTL_STATE_NAT)) 4875 YYERROR; 4876 if (disallow_urpf_failed($9, "\"urpf-failed\" is not " 4877 "permitted as a binat destination")) 4878 YYERROR; 4879 4880 pfctl_init_rule(&binat); 4881 4882 if ($1 && $3.b1) { 4883 yyerror("\"pass\" not valid with \"no\""); 4884 YYERROR; 4885 } 4886 if ($1) 4887 binat.action = PF_NOBINAT; 4888 else 4889 binat.action = PF_BINAT; 4890 binat.natpass = $3.b1; 4891 binat.log = $3.b2; 4892 binat.logif = $3.w2; 4893 binat.af = $5; 4894 if (!binat.af && $8 != NULL && $8->af) 4895 binat.af = $8->af; 4896 if (!binat.af && $9 != NULL && $9->af) 4897 binat.af = $9->af; 4898 4899 if (!binat.af && $13 != NULL && $13->host) 4900 binat.af = $13->host->af; 4901 if (!binat.af) { 4902 yyerror("address family (inet/inet6) " 4903 "undefined"); 4904 YYERROR; 4905 } 4906 4907 if ($4 != NULL) { 4908 memcpy(binat.ifname, $4->ifname, 4909 sizeof(binat.ifname)); 4910 binat.ifnot = $4->not; 4911 free($4); 4912 } 4913 4914 if ($10 != NULL) 4915 if (strlcpy(binat.tagname, $10, 4916 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4917 yyerror("tag too long, max %u chars", 4918 PF_TAG_NAME_SIZE - 1); 4919 YYERROR; 4920 } 4921 if ($11.name) 4922 if (strlcpy(binat.match_tagname, $11.name, 4923 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4924 yyerror("tag too long, max %u chars", 4925 PF_TAG_NAME_SIZE - 1); 4926 YYERROR; 4927 } 4928 binat.match_tag_not = $11.neg; 4929 binat.rtableid = $12; 4930 4931 if ($6 != NULL) { 4932 binat.proto = $6->proto; 4933 free($6); 4934 } 4935 4936 if ($8 != NULL && disallow_table($8, "invalid use of " 4937 "table <%s> as the source address of a binat rule")) 4938 YYERROR; 4939 if ($8 != NULL && disallow_alias($8, "invalid use of " 4940 "interface (%s) as the source address of a binat " 4941 "rule")) 4942 YYERROR; 4943 if ($13 != NULL && $13->host != NULL && disallow_table( 4944 $13->host, "invalid use of table <%s> as the " 4945 "redirect address of a binat rule")) 4946 YYERROR; 4947 if ($13 != NULL && $13->host != NULL && disallow_alias( 4948 $13->host, "invalid use of interface (%s) as the " 4949 "redirect address of a binat rule")) 4950 YYERROR; 4951 4952 if ($8 != NULL) { 4953 if ($8->next) { 4954 yyerror("multiple binat ip addresses"); 4955 YYERROR; 4956 } 4957 if ($8->addr.type == PF_ADDR_DYNIFTL) 4958 $8->af = binat.af; 4959 if ($8->af != binat.af) { 4960 yyerror("binat ip versions must match"); 4961 YYERROR; 4962 } 4963 if ($8->addr.type == PF_ADDR_DYNIFTL) { 4964 if (($8 = gen_dynnode($8, binat.af)) == NULL) 4965 err(1, "calloc"); 4966 } 4967 if (check_netmask($8, binat.af)) 4968 YYERROR; 4969 memcpy(&binat.src.addr, &$8->addr, 4970 sizeof(binat.src.addr)); 4971 free($8); 4972 } 4973 if ($9 != NULL) { 4974 if ($9->next) { 4975 yyerror("multiple binat ip addresses"); 4976 YYERROR; 4977 } 4978 if ($9->af != binat.af && $9->af) { 4979 yyerror("binat ip versions must match"); 4980 YYERROR; 4981 } 4982 if ($9->addr.type == PF_ADDR_DYNIFTL) { 4983 if (($9 = gen_dynnode($9, binat.af)) == NULL) 4984 err(1, "calloc"); 4985 } 4986 if (check_netmask($9, binat.af)) 4987 YYERROR; 4988 memcpy(&binat.dst.addr, &$9->addr, 4989 sizeof(binat.dst.addr)); 4990 binat.dst.neg = $9->not; 4991 free($9); 4992 } 4993 4994 if (binat.action == PF_NOBINAT) { 4995 if ($13 != NULL) { 4996 yyerror("'no binat' rule does not need" 4997 " '->'"); 4998 YYERROR; 4999 } 5000 } else { 5001 if ($13 == NULL || $13->host == NULL) { 5002 yyerror("'binat' rule requires" 5003 " '-> address'"); 5004 YYERROR; 5005 } 5006 5007 remove_invalid_hosts(&$13->host, &binat.af); 5008 if (invalid_redirect($13->host, binat.af)) 5009 YYERROR; 5010 if ($13->host->next != NULL) { 5011 yyerror("binat rule must redirect to " 5012 "a single address"); 5013 YYERROR; 5014 } 5015 if ($13->host->addr.type == PF_ADDR_DYNIFTL) { 5016 if (($13->host = gen_dynnode($13->host, binat.af)) == NULL) 5017 err(1, "calloc"); 5018 } 5019 if (check_netmask($13->host, binat.af)) 5020 YYERROR; 5021 5022 if (!PF_AZERO(&binat.src.addr.v.a.mask, 5023 binat.af) && 5024 !PF_AEQ(&binat.src.addr.v.a.mask, 5025 &$13->host->addr.v.a.mask, binat.af)) { 5026 yyerror("'binat' source mask and " 5027 "redirect mask must be the same"); 5028 YYERROR; 5029 } 5030 5031 TAILQ_INIT(&binat.rdr.list); 5032 TAILQ_INIT(&binat.nat.list); 5033 pa = calloc(1, sizeof(struct pf_pooladdr)); 5034 if (pa == NULL) 5035 err(1, "binat: calloc"); 5036 pa->addr = $13->host->addr; 5037 pa->ifname[0] = 0; 5038 TAILQ_INSERT_TAIL(&binat.rdr.list, 5039 pa, entries); 5040 5041 free($13); 5042 } 5043 5044 pfctl_append_rule(pf, &binat, ""); 5045 } 5046 ; 5047 5048 tag : /* empty */ { $$ = NULL; } 5049 | TAG STRING { $$ = $2; } 5050 ; 5051 5052 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; } 5053 | not TAGGED string { $$.neg = $1; $$.name = $3; } 5054 ; 5055 5056 rtable : /* empty */ { $$ = -1; } 5057 | RTABLE NUMBER { 5058 if ($2 < 0 || $2 > rt_tableid_max()) { 5059 yyerror("invalid rtable id"); 5060 YYERROR; 5061 } 5062 $$ = $2; 5063 } 5064 ; 5065 5066 route_host : STRING { 5067 $$ = calloc(1, sizeof(struct node_host)); 5068 if ($$ == NULL) 5069 err(1, "route_host: calloc"); 5070 if (strlen($1) >= IFNAMSIZ) { 5071 yyerror("interface name too long"); 5072 YYERROR; 5073 } 5074 $$->ifname = strdup($1); 5075 set_ipmask($$, 128); 5076 $$->next = NULL; 5077 $$->tail = $$; 5078 } 5079 | '(' STRING host ')' { 5080 struct node_host *n; 5081 5082 $$ = $3; 5083 for (n = $3; n != NULL; n = n->next) { 5084 if (strlen($2) >= IFNAMSIZ) { 5085 yyerror("interface name too long"); 5086 YYERROR; 5087 } 5088 n->ifname = strdup($2); 5089 } 5090 } 5091 ; 5092 5093 route_host_list : route_host optnl { $$ = $1; } 5094 | route_host_list comma route_host optnl { 5095 if ($1->af == 0) 5096 $1->af = $3->af; 5097 if ($1->af != $3->af) { 5098 yyerror("all pool addresses must be in the " 5099 "same address family"); 5100 YYERROR; 5101 } 5102 $1->tail->next = $3; 5103 $1->tail = $3->tail; 5104 $$ = $1; 5105 } 5106 ; 5107 5108 routespec : route_host { $$ = $1; } 5109 | '{' optnl route_host_list '}' { $$ = $3; } 5110 ; 5111 5112 route : /* empty */ { 5113 $$.rt = PF_NOPFROUTE; 5114 } 5115 | FASTROUTE { 5116 /* backwards-compat */ 5117 $$.rt = PF_NOPFROUTE; 5118 } 5119 | ROUTETO route_redirspec { 5120 $$.rt = PF_ROUTETO; 5121 $$.redirspec = $2; 5122 } 5123 | REPLYTO route_redirspec { 5124 $$.rt = PF_REPLYTO; 5125 $$.redirspec = $2; 5126 } 5127 | DUPTO route_redirspec { 5128 $$.rt = PF_DUPTO; 5129 $$.redirspec = $2; 5130 } 5131 ; 5132 5133 timeout_spec : STRING NUMBER 5134 { 5135 if (check_rulestate(PFCTL_STATE_OPTION)) { 5136 free($1); 5137 YYERROR; 5138 } 5139 if ($2 < 0 || $2 > UINT_MAX) { 5140 yyerror("only positive values permitted"); 5141 YYERROR; 5142 } 5143 if (pfctl_apply_timeout(pf, $1, $2, 0) != 0) { 5144 yyerror("unknown timeout %s", $1); 5145 free($1); 5146 YYERROR; 5147 } 5148 free($1); 5149 } 5150 | INTERVAL NUMBER { 5151 if (check_rulestate(PFCTL_STATE_OPTION)) 5152 YYERROR; 5153 if ($2 < 0 || $2 > UINT_MAX) { 5154 yyerror("only positive values permitted"); 5155 YYERROR; 5156 } 5157 if (pfctl_apply_timeout(pf, "interval", $2, 0) != 0) 5158 YYERROR; 5159 } 5160 ; 5161 5162 timeout_list : timeout_list comma timeout_spec optnl 5163 | timeout_spec optnl 5164 ; 5165 5166 limit_spec : STRING NUMBER 5167 { 5168 if (check_rulestate(PFCTL_STATE_OPTION)) { 5169 free($1); 5170 YYERROR; 5171 } 5172 if ($2 < 0 || $2 > UINT_MAX) { 5173 yyerror("only positive values permitted"); 5174 YYERROR; 5175 } 5176 if (pfctl_apply_limit(pf, $1, $2) != 0) { 5177 yyerror("unable to set limit %s %u", $1, $2); 5178 free($1); 5179 YYERROR; 5180 } 5181 free($1); 5182 } 5183 ; 5184 5185 limit_list : limit_list comma limit_spec optnl 5186 | limit_spec optnl 5187 ; 5188 5189 comma : ',' 5190 | /* empty */ 5191 ; 5192 5193 yesno : NO { $$ = 0; } 5194 | STRING { 5195 if (!strcmp($1, "yes")) 5196 $$ = 1; 5197 else { 5198 yyerror("invalid value '%s', expected 'yes' " 5199 "or 'no'", $1); 5200 free($1); 5201 YYERROR; 5202 } 5203 free($1); 5204 } 5205 ; 5206 5207 unaryop : '=' { $$ = PF_OP_EQ; } 5208 | NE { $$ = PF_OP_NE; } 5209 | LE { $$ = PF_OP_LE; } 5210 | '<' { $$ = PF_OP_LT; } 5211 | GE { $$ = PF_OP_GE; } 5212 | '>' { $$ = PF_OP_GT; } 5213 ; 5214 5215 %% 5216 5217 int 5218 yyerror(const char *fmt, ...) 5219 { 5220 va_list ap; 5221 5222 file->errors++; 5223 va_start(ap, fmt); 5224 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno); 5225 vfprintf(stderr, fmt, ap); 5226 fprintf(stderr, "\n"); 5227 va_end(ap); 5228 return (0); 5229 } 5230 5231 int 5232 disallow_table(struct node_host *h, const char *fmt) 5233 { 5234 for (; h != NULL; h = h->next) 5235 if (h->addr.type == PF_ADDR_TABLE) { 5236 yyerror(fmt, h->addr.v.tblname); 5237 return (1); 5238 } 5239 return (0); 5240 } 5241 5242 int 5243 disallow_urpf_failed(struct node_host *h, const char *fmt) 5244 { 5245 for (; h != NULL; h = h->next) 5246 if (h->addr.type == PF_ADDR_URPFFAILED) { 5247 yyerror(fmt); 5248 return (1); 5249 } 5250 return (0); 5251 } 5252 5253 int 5254 disallow_alias(struct node_host *h, const char *fmt) 5255 { 5256 for (; h != NULL; h = h->next) 5257 if (DYNIF_MULTIADDR(h->addr)) { 5258 yyerror(fmt, h->addr.v.tblname); 5259 return (1); 5260 } 5261 return (0); 5262 } 5263 5264 int 5265 rule_consistent(struct pfctl_rule *r, int anchor_call) 5266 { 5267 int problems = 0; 5268 5269 switch (r->action) { 5270 case PF_PASS: 5271 case PF_MATCH: 5272 case PF_DROP: 5273 case PF_SCRUB: 5274 case PF_NOSCRUB: 5275 problems = filter_consistent(r, anchor_call); 5276 break; 5277 case PF_NAT: 5278 case PF_NONAT: 5279 problems = nat_consistent(r); 5280 break; 5281 case PF_RDR: 5282 case PF_NORDR: 5283 problems = rdr_consistent(r); 5284 break; 5285 case PF_BINAT: 5286 case PF_NOBINAT: 5287 default: 5288 break; 5289 } 5290 return (problems); 5291 } 5292 5293 int 5294 filter_consistent(struct pfctl_rule *r, int anchor_call) 5295 { 5296 int problems = 0; 5297 5298 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 5299 r->proto != IPPROTO_SCTP && 5300 (r->src.port_op || r->dst.port_op)) { 5301 yyerror("port only applies to tcp/udp/sctp"); 5302 problems++; 5303 } 5304 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 5305 (r->type || r->code)) { 5306 yyerror("icmp-type/code only applies to icmp"); 5307 problems++; 5308 } 5309 if (!r->af && (r->type || r->code)) { 5310 yyerror("must indicate address family with icmp-type/code"); 5311 problems++; 5312 } 5313 if (r->rule_flag & PFRULE_AFTO && r->af == r->naf) { 5314 yyerror("must indicate different address family with af-to"); 5315 problems++; 5316 } 5317 if (r->overload_tblname[0] && 5318 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) { 5319 yyerror("'overload' requires 'max-src-conn' " 5320 "or 'max-src-conn-rate'"); 5321 problems++; 5322 } 5323 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 5324 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 5325 yyerror("proto %s doesn't match address family %s", 5326 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 5327 r->af == AF_INET ? "inet" : "inet6"); 5328 problems++; 5329 } 5330 if (r->allow_opts && r->action != PF_PASS && r->action != PF_MATCH) { 5331 yyerror("allow-opts can only be specified for pass or " 5332 "match rules"); 5333 problems++; 5334 } 5335 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 5336 r->dst.port_op || r->flagset || r->type || r->code)) { 5337 yyerror("fragments can be filtered only on IP header fields"); 5338 problems++; 5339 } 5340 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 5341 yyerror("return-rst can only be applied to TCP rules"); 5342 problems++; 5343 } 5344 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) { 5345 yyerror("max-src-nodes requires 'source-track rule'"); 5346 problems++; 5347 } 5348 if (r->action != PF_PASS && r->keep_state) { 5349 yyerror("keep state is great, but only for pass rules"); 5350 problems++; 5351 } 5352 if (r->rule_flag & PFRULE_STATESLOPPY && 5353 (r->keep_state == PF_STATE_MODULATE || 5354 r->keep_state == PF_STATE_SYNPROXY)) { 5355 yyerror("sloppy state matching cannot be used with " 5356 "synproxy state or modulate state"); 5357 problems++; 5358 } 5359 if (r->rule_flag & PFRULE_AFTO && r->rt) { 5360 if (r->rt != PF_ROUTETO && r->rt != PF_REPLYTO) { 5361 yyerror("dup-to " 5362 "must not be used on af-to rules"); 5363 problems++; 5364 } 5365 } 5366 /* Basic rule sanity check. */ 5367 switch (r->action) { 5368 case PF_MATCH: 5369 if (r->divert.port) { 5370 yyerror("divert is not supported on match rules"); 5371 problems++; 5372 } 5373 if (r->rt) { 5374 yyerror("route-to, reply-to, dup-to and fastroute " 5375 "must not be used on match rules"); 5376 problems++; 5377 } 5378 if (r->rule_flag & PFRULE_AFTO) { 5379 yyerror("af-to is not supported on match rules"); 5380 problems++; 5381 } 5382 break; 5383 case PF_DROP: 5384 if (r->rt) { 5385 yyerror("route-to, reply-to and dup-to " 5386 "are not supported on block rules"); 5387 problems++; 5388 } 5389 break; 5390 default:; 5391 } 5392 if (r->rdr.opts & PF_POOL_STICKYADDR && !r->keep_state) { 5393 yyerror("'sticky-address' requires 'keep state'"); 5394 problems++; 5395 } 5396 return (-problems); 5397 } 5398 5399 int 5400 nat_consistent(struct pfctl_rule *r) 5401 { 5402 return (0); /* yeah! */ 5403 } 5404 5405 int 5406 rdr_consistent(struct pfctl_rule *r) 5407 { 5408 int problems = 0; 5409 5410 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 5411 r->proto != IPPROTO_SCTP) { 5412 if (r->src.port_op) { 5413 yyerror("src port only applies to tcp/udp/sctp"); 5414 problems++; 5415 } 5416 if (r->dst.port_op) { 5417 yyerror("dst port only applies to tcp/udp/sctp"); 5418 problems++; 5419 } 5420 if (r->rdr.proxy_port[0]) { 5421 yyerror("rdr port only applies to tcp/udp/sctp"); 5422 problems++; 5423 } 5424 } 5425 if (r->dst.port_op && 5426 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 5427 yyerror("invalid port operator for rdr destination port"); 5428 problems++; 5429 } 5430 return (-problems); 5431 } 5432 5433 int 5434 process_tabledef(char *name, struct table_opts *opts) 5435 { 5436 struct pfr_buffer ab; 5437 struct node_tinit *ti; 5438 unsigned long maxcount; 5439 size_t s = sizeof(maxcount); 5440 5441 bzero(&ab, sizeof(ab)); 5442 ab.pfrb_type = PFRB_ADDRS; 5443 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 5444 if (ti->file) 5445 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) { 5446 if (errno) 5447 yyerror("cannot load \"%s\": %s", 5448 ti->file, strerror(errno)); 5449 else 5450 yyerror("file \"%s\" contains bad data", 5451 ti->file); 5452 goto _error; 5453 } 5454 if (ti->host) 5455 if (append_addr_host(&ab, ti->host, 0, 0)) { 5456 yyerror("cannot create address buffer: %s", 5457 strerror(errno)); 5458 goto _error; 5459 } 5460 } 5461 if (pf->opts & PF_OPT_VERBOSE) 5462 print_tabledef(name, opts->flags, opts->init_addr, 5463 &opts->init_nodes); 5464 if (!(pf->opts & PF_OPT_NOACTION) && 5465 pfctl_define_table(name, opts->flags, opts->init_addr, 5466 pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) { 5467 5468 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s, 5469 NULL, 0) == -1) 5470 maxcount = 65535; 5471 5472 if (ab.pfrb_size > maxcount) 5473 yyerror("cannot define table %s: too many elements.\n" 5474 "Consider increasing net.pf.request_maxcount.", 5475 name); 5476 else 5477 yyerror("cannot define table %s: %s", name, 5478 pfr_strerror(errno)); 5479 5480 goto _error; 5481 } 5482 pf->tdirty = 1; 5483 pfr_buf_clear(&ab); 5484 return (0); 5485 _error: 5486 pfr_buf_clear(&ab); 5487 return (-1); 5488 } 5489 5490 struct keywords { 5491 const char *k_name; 5492 int k_val; 5493 }; 5494 5495 /* macro gore, but you should've seen the prior indentation nightmare... */ 5496 5497 #define FREE_LIST(T,r) \ 5498 do { \ 5499 T *p, *node = r; \ 5500 while (node != NULL) { \ 5501 p = node; \ 5502 node = node->next; \ 5503 free(p); \ 5504 } \ 5505 } while (0) 5506 5507 #define LOOP_THROUGH(T,n,r,C) \ 5508 do { \ 5509 T *n; \ 5510 if (r == NULL) { \ 5511 r = calloc(1, sizeof(T)); \ 5512 if (r == NULL) \ 5513 err(1, "LOOP: calloc"); \ 5514 r->next = NULL; \ 5515 } \ 5516 n = r; \ 5517 while (n != NULL) { \ 5518 do { \ 5519 C; \ 5520 } while (0); \ 5521 n = n->next; \ 5522 } \ 5523 } while (0) 5524 5525 void 5526 expand_label_str(char *label, size_t len, const char *srch, const char *repl) 5527 { 5528 char *tmp; 5529 char *p, *q; 5530 5531 if ((tmp = calloc(1, len)) == NULL) 5532 err(1, "expand_label_str: calloc"); 5533 p = q = label; 5534 while ((q = strstr(p, srch)) != NULL) { 5535 *q = '\0'; 5536 if ((strlcat(tmp, p, len) >= len) || 5537 (strlcat(tmp, repl, len) >= len)) 5538 errx(1, "expand_label: label too long"); 5539 q += strlen(srch); 5540 p = q; 5541 } 5542 if (strlcat(tmp, p, len) >= len) 5543 errx(1, "expand_label: label too long"); 5544 strlcpy(label, tmp, len); /* always fits */ 5545 free(tmp); 5546 } 5547 5548 void 5549 expand_label_if(const char *name, char *label, size_t len, const char *ifname) 5550 { 5551 if (strstr(label, name) != NULL) { 5552 if (!*ifname) 5553 expand_label_str(label, len, name, "any"); 5554 else 5555 expand_label_str(label, len, name, ifname); 5556 } 5557 } 5558 5559 void 5560 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af, 5561 struct pf_rule_addr *addr) 5562 { 5563 char tmp[64], tmp_not[66]; 5564 5565 if (strstr(label, name) != NULL) { 5566 switch (addr->addr.type) { 5567 case PF_ADDR_DYNIFTL: 5568 snprintf(tmp, sizeof(tmp), "(%s)", addr->addr.v.ifname); 5569 break; 5570 case PF_ADDR_TABLE: 5571 snprintf(tmp, sizeof(tmp), "<%s>", addr->addr.v.tblname); 5572 break; 5573 case PF_ADDR_NOROUTE: 5574 snprintf(tmp, sizeof(tmp), "no-route"); 5575 break; 5576 case PF_ADDR_URPFFAILED: 5577 snprintf(tmp, sizeof(tmp), "urpf-failed"); 5578 break; 5579 case PF_ADDR_ADDRMASK: 5580 if (!af || (PF_AZERO(&addr->addr.v.a.addr, af) && 5581 PF_AZERO(&addr->addr.v.a.mask, af))) 5582 snprintf(tmp, sizeof(tmp), "any"); 5583 else { 5584 char a[48]; 5585 int bits; 5586 5587 if (inet_ntop(af, &addr->addr.v.a.addr, a, 5588 sizeof(a)) == NULL) 5589 snprintf(tmp, sizeof(tmp), "?"); 5590 else { 5591 bits = unmask(&addr->addr.v.a.mask, af); 5592 if ((af == AF_INET && bits < 32) || 5593 (af == AF_INET6 && bits < 128)) 5594 snprintf(tmp, sizeof(tmp), 5595 "%s/%d", a, bits); 5596 else 5597 snprintf(tmp, sizeof(tmp), 5598 "%s", a); 5599 } 5600 } 5601 break; 5602 default: 5603 snprintf(tmp, sizeof(tmp), "?"); 5604 break; 5605 } 5606 5607 if (addr->neg) { 5608 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 5609 expand_label_str(label, len, name, tmp_not); 5610 } else 5611 expand_label_str(label, len, name, tmp); 5612 } 5613 } 5614 5615 void 5616 expand_label_port(const char *name, char *label, size_t len, 5617 struct pf_rule_addr *addr) 5618 { 5619 char a1[6], a2[6], op[13] = ""; 5620 5621 if (strstr(label, name) != NULL) { 5622 snprintf(a1, sizeof(a1), "%u", ntohs(addr->port[0])); 5623 snprintf(a2, sizeof(a2), "%u", ntohs(addr->port[1])); 5624 if (!addr->port_op) 5625 ; 5626 else if (addr->port_op == PF_OP_IRG) 5627 snprintf(op, sizeof(op), "%s><%s", a1, a2); 5628 else if (addr->port_op == PF_OP_XRG) 5629 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 5630 else if (addr->port_op == PF_OP_EQ) 5631 snprintf(op, sizeof(op), "%s", a1); 5632 else if (addr->port_op == PF_OP_NE) 5633 snprintf(op, sizeof(op), "!=%s", a1); 5634 else if (addr->port_op == PF_OP_LT) 5635 snprintf(op, sizeof(op), "<%s", a1); 5636 else if (addr->port_op == PF_OP_LE) 5637 snprintf(op, sizeof(op), "<=%s", a1); 5638 else if (addr->port_op == PF_OP_GT) 5639 snprintf(op, sizeof(op), ">%s", a1); 5640 else if (addr->port_op == PF_OP_GE) 5641 snprintf(op, sizeof(op), ">=%s", a1); 5642 expand_label_str(label, len, name, op); 5643 } 5644 } 5645 5646 void 5647 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto) 5648 { 5649 const char *protoname; 5650 char n[4]; 5651 5652 if (strstr(label, name) != NULL) { 5653 protoname = pfctl_proto2name(proto); 5654 if (protoname != NULL) 5655 expand_label_str(label, len, name, protoname); 5656 else { 5657 snprintf(n, sizeof(n), "%u", proto); 5658 expand_label_str(label, len, name, n); 5659 } 5660 } 5661 } 5662 5663 void 5664 expand_label_nr(const char *name, char *label, size_t len, 5665 struct pfctl_rule *r) 5666 { 5667 char n[11]; 5668 5669 if (strstr(label, name) != NULL) { 5670 snprintf(n, sizeof(n), "%u", r->nr); 5671 expand_label_str(label, len, name, n); 5672 } 5673 } 5674 5675 void 5676 expand_label(char *label, size_t len, struct pfctl_rule *r) 5677 { 5678 expand_label_if("$if", label, len, r->ifname); 5679 expand_label_addr("$srcaddr", label, len, r->af, &r->src); 5680 expand_label_addr("$dstaddr", label, len, r->af, &r->dst); 5681 expand_label_port("$srcport", label, len, &r->src); 5682 expand_label_port("$dstport", label, len, &r->dst); 5683 expand_label_proto("$proto", label, len, r->proto); 5684 expand_label_nr("$nr", label, len, r); 5685 } 5686 5687 int 5688 expand_altq(struct pf_altq *a, struct node_if *interfaces, 5689 struct node_queue *nqueues, struct node_queue_bw bwspec, 5690 struct node_queue_opt *opts) 5691 { 5692 struct pf_altq pa, pb; 5693 char qname[PF_QNAME_SIZE]; 5694 struct node_queue *n; 5695 struct node_queue_bw bw; 5696 int errs = 0; 5697 5698 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5699 FREE_LIST(struct node_if, interfaces); 5700 if (nqueues) 5701 FREE_LIST(struct node_queue, nqueues); 5702 return (0); 5703 } 5704 5705 LOOP_THROUGH(struct node_if, interface, interfaces, 5706 memcpy(&pa, a, sizeof(struct pf_altq)); 5707 if (strlcpy(pa.ifname, interface->ifname, 5708 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5709 errx(1, "expand_altq: strlcpy"); 5710 5711 if (interface->not) { 5712 yyerror("altq on ! <interface> is not supported"); 5713 errs++; 5714 } else { 5715 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 5716 errs++; 5717 else 5718 if (pfctl_add_altq(pf, &pa)) 5719 errs++; 5720 5721 if (pf->opts & PF_OPT_VERBOSE) { 5722 print_altq(&pf->paltq->altq, 0, 5723 &bwspec, opts); 5724 if (nqueues && nqueues->tail) { 5725 printf("queue { "); 5726 LOOP_THROUGH(struct node_queue, queue, 5727 nqueues, 5728 printf("%s ", 5729 queue->queue); 5730 ); 5731 printf("}"); 5732 } 5733 printf("\n"); 5734 } 5735 5736 if (pa.scheduler == ALTQT_CBQ || 5737 pa.scheduler == ALTQT_HFSC || 5738 pa.scheduler == ALTQT_FAIRQ) { 5739 /* now create a root queue */ 5740 memset(&pb, 0, sizeof(struct pf_altq)); 5741 if (strlcpy(qname, "root_", sizeof(qname)) >= 5742 sizeof(qname)) 5743 errx(1, "expand_altq: strlcpy"); 5744 if (strlcat(qname, interface->ifname, 5745 sizeof(qname)) >= sizeof(qname)) 5746 errx(1, "expand_altq: strlcat"); 5747 if (strlcpy(pb.qname, qname, 5748 sizeof(pb.qname)) >= sizeof(pb.qname)) 5749 errx(1, "expand_altq: strlcpy"); 5750 if (strlcpy(pb.ifname, interface->ifname, 5751 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 5752 errx(1, "expand_altq: strlcpy"); 5753 pb.qlimit = pa.qlimit; 5754 pb.scheduler = pa.scheduler; 5755 bw.bw_absolute = pa.ifbandwidth; 5756 bw.bw_percent = 0; 5757 if (eval_pfqueue(pf, &pb, &bw, opts)) 5758 errs++; 5759 else 5760 if (pfctl_add_altq(pf, &pb)) 5761 errs++; 5762 } 5763 5764 LOOP_THROUGH(struct node_queue, queue, nqueues, 5765 n = calloc(1, sizeof(struct node_queue)); 5766 if (n == NULL) 5767 err(1, "expand_altq: calloc"); 5768 if (pa.scheduler == ALTQT_CBQ || 5769 pa.scheduler == ALTQT_HFSC || 5770 pa.scheduler == ALTQT_FAIRQ) 5771 if (strlcpy(n->parent, qname, 5772 sizeof(n->parent)) >= 5773 sizeof(n->parent)) 5774 errx(1, "expand_altq: strlcpy"); 5775 if (strlcpy(n->queue, queue->queue, 5776 sizeof(n->queue)) >= sizeof(n->queue)) 5777 errx(1, "expand_altq: strlcpy"); 5778 if (strlcpy(n->ifname, interface->ifname, 5779 sizeof(n->ifname)) >= sizeof(n->ifname)) 5780 errx(1, "expand_altq: strlcpy"); 5781 n->scheduler = pa.scheduler; 5782 n->next = NULL; 5783 n->tail = n; 5784 if (queues == NULL) 5785 queues = n; 5786 else { 5787 queues->tail->next = n; 5788 queues->tail = n; 5789 } 5790 ); 5791 } 5792 ); 5793 FREE_LIST(struct node_if, interfaces); 5794 if (nqueues) 5795 FREE_LIST(struct node_queue, nqueues); 5796 5797 return (errs); 5798 } 5799 5800 int 5801 expand_queue(struct pf_altq *a, struct node_if *interfaces, 5802 struct node_queue *nqueues, struct node_queue_bw bwspec, 5803 struct node_queue_opt *opts) 5804 { 5805 struct node_queue *n, *nq; 5806 struct pf_altq pa; 5807 u_int8_t found = 0; 5808 u_int8_t errs = 0; 5809 5810 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5811 FREE_LIST(struct node_queue, nqueues); 5812 return (0); 5813 } 5814 5815 if (queues == NULL) { 5816 yyerror("queue %s has no parent", a->qname); 5817 FREE_LIST(struct node_queue, nqueues); 5818 return (1); 5819 } 5820 5821 LOOP_THROUGH(struct node_if, interface, interfaces, 5822 LOOP_THROUGH(struct node_queue, tqueue, queues, 5823 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 5824 (interface->ifname[0] == 0 || 5825 (!interface->not && !strncmp(interface->ifname, 5826 tqueue->ifname, IFNAMSIZ)) || 5827 (interface->not && strncmp(interface->ifname, 5828 tqueue->ifname, IFNAMSIZ)))) { 5829 /* found ourself in queues */ 5830 found++; 5831 5832 memcpy(&pa, a, sizeof(struct pf_altq)); 5833 5834 if (pa.scheduler != ALTQT_NONE && 5835 pa.scheduler != tqueue->scheduler) { 5836 yyerror("exactly one scheduler type " 5837 "per interface allowed"); 5838 return (1); 5839 } 5840 pa.scheduler = tqueue->scheduler; 5841 5842 /* scheduler dependent error checking */ 5843 switch (pa.scheduler) { 5844 case ALTQT_PRIQ: 5845 if (nqueues != NULL) { 5846 yyerror("priq queues cannot " 5847 "have child queues"); 5848 return (1); 5849 } 5850 if (bwspec.bw_absolute > 0 || 5851 bwspec.bw_percent < 100) { 5852 yyerror("priq doesn't take " 5853 "bandwidth"); 5854 return (1); 5855 } 5856 break; 5857 default: 5858 break; 5859 } 5860 5861 if (strlcpy(pa.ifname, tqueue->ifname, 5862 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5863 errx(1, "expand_queue: strlcpy"); 5864 if (strlcpy(pa.parent, tqueue->parent, 5865 sizeof(pa.parent)) >= sizeof(pa.parent)) 5866 errx(1, "expand_queue: strlcpy"); 5867 5868 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 5869 errs++; 5870 else 5871 if (pfctl_add_altq(pf, &pa)) 5872 errs++; 5873 5874 for (nq = nqueues; nq != NULL; nq = nq->next) { 5875 if (!strcmp(a->qname, nq->queue)) { 5876 yyerror("queue cannot have " 5877 "itself as child"); 5878 errs++; 5879 continue; 5880 } 5881 n = calloc(1, 5882 sizeof(struct node_queue)); 5883 if (n == NULL) 5884 err(1, "expand_queue: calloc"); 5885 if (strlcpy(n->parent, a->qname, 5886 sizeof(n->parent)) >= 5887 sizeof(n->parent)) 5888 errx(1, "expand_queue strlcpy"); 5889 if (strlcpy(n->queue, nq->queue, 5890 sizeof(n->queue)) >= 5891 sizeof(n->queue)) 5892 errx(1, "expand_queue strlcpy"); 5893 if (strlcpy(n->ifname, tqueue->ifname, 5894 sizeof(n->ifname)) >= 5895 sizeof(n->ifname)) 5896 errx(1, "expand_queue strlcpy"); 5897 n->scheduler = tqueue->scheduler; 5898 n->next = NULL; 5899 n->tail = n; 5900 if (queues == NULL) 5901 queues = n; 5902 else { 5903 queues->tail->next = n; 5904 queues->tail = n; 5905 } 5906 } 5907 if ((pf->opts & PF_OPT_VERBOSE) && ( 5908 (found == 1 && interface->ifname[0] == 0) || 5909 (found > 0 && interface->ifname[0] != 0))) { 5910 print_queue(&pf->paltq->altq, 0, 5911 &bwspec, interface->ifname[0] != 0, 5912 opts); 5913 if (nqueues && nqueues->tail) { 5914 printf("{ "); 5915 LOOP_THROUGH(struct node_queue, 5916 queue, nqueues, 5917 printf("%s ", 5918 queue->queue); 5919 ); 5920 printf("}"); 5921 } 5922 printf("\n"); 5923 } 5924 } 5925 ); 5926 ); 5927 5928 FREE_LIST(struct node_queue, nqueues); 5929 FREE_LIST(struct node_if, interfaces); 5930 5931 if (!found) { 5932 yyerror("queue %s has no parent", a->qname); 5933 errs++; 5934 } 5935 5936 if (errs) 5937 return (1); 5938 else 5939 return (0); 5940 } 5941 5942 static int 5943 pf_af_to_proto(sa_family_t af) 5944 { 5945 if (af == AF_INET) 5946 return (ETHERTYPE_IP); 5947 if (af == AF_INET6) 5948 return (ETHERTYPE_IPV6); 5949 5950 return (0); 5951 } 5952 5953 void 5954 expand_eth_rule(struct pfctl_eth_rule *r, 5955 struct node_if *interfaces, struct node_etherproto *protos, 5956 struct node_mac *srcs, struct node_mac *dsts, 5957 struct node_host *ipsrcs, struct node_host *ipdsts, 5958 const char *bridge_to, const char *anchor_call) 5959 { 5960 char tagname[PF_TAG_NAME_SIZE]; 5961 char match_tagname[PF_TAG_NAME_SIZE]; 5962 char qname[PF_QNAME_SIZE]; 5963 5964 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 5965 errx(1, "expand_eth_rule: tagname"); 5966 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 5967 sizeof(match_tagname)) 5968 errx(1, "expand_eth_rule: match_tagname"); 5969 if (strlcpy(qname, r->qname, sizeof(qname)) >= sizeof(qname)) 5970 errx(1, "expand_eth_rule: qname"); 5971 5972 LOOP_THROUGH(struct node_if, interface, interfaces, 5973 LOOP_THROUGH(struct node_etherproto, proto, protos, 5974 LOOP_THROUGH(struct node_mac, src, srcs, 5975 LOOP_THROUGH(struct node_mac, dst, dsts, 5976 LOOP_THROUGH(struct node_host, ipsrc, ipsrcs, 5977 LOOP_THROUGH(struct node_host, ipdst, ipdsts, 5978 strlcpy(r->ifname, interface->ifname, 5979 sizeof(r->ifname)); 5980 r->ifnot = interface->not; 5981 r->proto = proto->proto; 5982 if (!r->proto && ipsrc->af) 5983 r->proto = pf_af_to_proto(ipsrc->af); 5984 else if (!r->proto && ipdst->af) 5985 r->proto = pf_af_to_proto(ipdst->af); 5986 bcopy(src->mac, r->src.addr, ETHER_ADDR_LEN); 5987 bcopy(src->mask, r->src.mask, ETHER_ADDR_LEN); 5988 r->src.neg = src->neg; 5989 r->src.isset = src->isset; 5990 r->ipsrc.addr = ipsrc->addr; 5991 r->ipsrc.neg = ipsrc->not; 5992 r->ipdst.addr = ipdst->addr; 5993 r->ipdst.neg = ipdst->not; 5994 bcopy(dst->mac, r->dst.addr, ETHER_ADDR_LEN); 5995 bcopy(dst->mask, r->dst.mask, ETHER_ADDR_LEN); 5996 r->dst.neg = dst->neg; 5997 r->dst.isset = dst->isset; 5998 r->nr = pf->eastack[pf->asd]->match++; 5999 6000 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 6001 sizeof(r->tagname)) 6002 errx(1, "expand_eth_rule: r->tagname"); 6003 if (strlcpy(r->match_tagname, match_tagname, 6004 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 6005 errx(1, "expand_eth_rule: r->match_tagname"); 6006 if (strlcpy(r->qname, qname, sizeof(r->qname)) >= sizeof(r->qname)) 6007 errx(1, "expand_eth_rule: r->qname"); 6008 6009 if (bridge_to) 6010 strlcpy(r->bridge_to, bridge_to, sizeof(r->bridge_to)); 6011 6012 pfctl_append_eth_rule(pf, r, anchor_call); 6013 )))))); 6014 6015 FREE_LIST(struct node_if, interfaces); 6016 FREE_LIST(struct node_etherproto, protos); 6017 FREE_LIST(struct node_mac, srcs); 6018 FREE_LIST(struct node_mac, dsts); 6019 FREE_LIST(struct node_host, ipsrcs); 6020 FREE_LIST(struct node_host, ipdsts); 6021 } 6022 6023 int 6024 apply_rdr_ports(struct pfctl_rule *r, struct pfctl_pool *rpool, struct redirspec *rs) 6025 { 6026 if (rs == NULL) 6027 return 0; 6028 6029 rpool->proxy_port[0] = ntohs(rs->rport.a); 6030 6031 if (!rs->rport.b && rs->rport.t && r->dst.port != NULL) { 6032 rpool->proxy_port[1] = ntohs(rs->rport.a) + 6033 (ntohs(r->dst.port[1]) - ntohs(r->dst.port[0])); 6034 } else 6035 r->rdr.proxy_port[1] = ntohs(rs->rport.b); 6036 6037 if (rs->pool_opts.staticport) { 6038 yyerror("the 'static-port' option is only valid with nat rules"); 6039 return 1; 6040 } 6041 6042 if (rs->pool_opts.mape.offset) { 6043 yyerror("the 'map-e-portset' option is only valid with nat rules"); 6044 return 1; 6045 } 6046 6047 return 0; 6048 } 6049 6050 int 6051 apply_nat_ports(struct pfctl_pool *rpool, struct redirspec *rs) 6052 { 6053 if (rs == NULL) 6054 return 0; 6055 6056 rpool->proxy_port[0] = ntohs(rs->rport.a); 6057 rpool->proxy_port[1] = ntohs(rs->rport.b); 6058 if (!rpool->proxy_port[0] && !rpool->proxy_port[1]) { 6059 rpool->proxy_port[0] = PF_NAT_PROXY_PORT_LOW; 6060 rpool->proxy_port[1] = PF_NAT_PROXY_PORT_HIGH; 6061 } else if (!rpool->proxy_port[1]) 6062 rpool->proxy_port[1] = rpool->proxy_port[0]; 6063 6064 if (rs->pool_opts.staticport) { 6065 if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW && 6066 rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) { 6067 yyerror("the 'static-port' option can't" 6068 " be used when specifying a port" 6069 " range"); 6070 return 1; 6071 } 6072 rpool->proxy_port[0] = 0; 6073 rpool->proxy_port[1] = 0; 6074 } 6075 6076 if (rs->pool_opts.mape.offset) { 6077 if (rs->pool_opts.staticport) { 6078 yyerror("the 'map-e-portset' option" 6079 " can't be used 'static-port'"); 6080 return 1; 6081 } 6082 if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW && 6083 rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) { 6084 yyerror("the 'map-e-portset' option" 6085 " can't be used when specifying" 6086 " a port range"); 6087 return 1; 6088 } 6089 rpool->mape = rs->pool_opts.mape; 6090 } 6091 6092 return 0; 6093 } 6094 6095 int 6096 apply_redirspec(struct pfctl_pool *rpool, struct redirspec *rs) 6097 { 6098 struct node_host *h; 6099 struct pf_pooladdr *pa; 6100 6101 if (rs == NULL) 6102 return 0; 6103 6104 rpool->opts = rs->pool_opts.type; 6105 6106 if ((rpool->opts & PF_POOL_TYPEMASK) == PF_POOL_NONE && 6107 (rs->host->next != NULL || 6108 rs->host->addr.type == PF_ADDR_TABLE || 6109 DYNIF_MULTIADDR(rs->host->addr))) 6110 rpool->opts = PF_POOL_ROUNDROBIN; 6111 6112 if (!PF_POOL_DYNTYPE(rpool->opts) && 6113 (disallow_table(rs->host, "tables are not supported by pool type") || 6114 disallow_alias(rs->host, "interface (%s) is not supported by pool type"))) 6115 return 1; 6116 6117 if (rs->host->next != NULL && 6118 ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN)) { 6119 yyerror("r.route.opts must be PF_POOL_ROUNDROBIN"); 6120 return 1; 6121 } 6122 6123 if (rs->host->next != NULL) { 6124 if ((rpool->opts & PF_POOL_TYPEMASK) != 6125 PF_POOL_ROUNDROBIN) { 6126 yyerror("only round-robin valid for multiple " 6127 "redirection addresses"); 6128 return 1; 6129 } 6130 } 6131 6132 rpool->opts |= rs->pool_opts.opts; 6133 6134 if (rs->pool_opts.key != NULL) 6135 memcpy(&(rpool->key), rs->pool_opts.key, 6136 sizeof(struct pf_poolhashkey)); 6137 6138 TAILQ_INIT(&(rpool->list)); 6139 for (h = rs->host; h != NULL; h = h->next) { 6140 pa = calloc(1, sizeof(struct pf_pooladdr)); 6141 if (pa == NULL) 6142 err(1, "expand_rule: calloc"); 6143 pa->addr = h->addr; 6144 if (h->ifname != NULL) { 6145 if (strlcpy(pa->ifname, h->ifname, 6146 sizeof(pa->ifname)) >= sizeof(pa->ifname)) 6147 errx(1, "expand_rule: strlcpy"); 6148 } else 6149 pa->ifname[0] = 0; 6150 TAILQ_INSERT_TAIL(&(rpool->list), pa, entries); 6151 } 6152 6153 return 0; 6154 } 6155 6156 void 6157 expand_rule(struct pfctl_rule *r, 6158 struct node_if *interfaces, struct redirspec *nat, 6159 struct redirspec *rdr, struct redirspec *route, 6160 struct node_proto *protos, 6161 struct node_os *src_oses, struct node_host *src_hosts, 6162 struct node_port *src_ports, struct node_host *dst_hosts, 6163 struct node_port *dst_ports, struct node_uid *uids, struct node_gid *gids, 6164 struct node_if *rcv, struct node_icmp *icmp_types, const char *anchor_call) 6165 { 6166 sa_family_t af = r->af; 6167 int added = 0, error = 0; 6168 char ifname[IF_NAMESIZE]; 6169 char label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE]; 6170 char tagname[PF_TAG_NAME_SIZE]; 6171 char match_tagname[PF_TAG_NAME_SIZE]; 6172 struct node_host *osrch, *odsth; 6173 u_int8_t flags, flagset, keep_state; 6174 6175 memcpy(label, r->label, sizeof(r->label)); 6176 assert(sizeof(r->label) == sizeof(label)); 6177 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 6178 errx(1, "expand_rule: strlcpy"); 6179 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 6180 sizeof(match_tagname)) 6181 errx(1, "expand_rule: strlcpy"); 6182 flags = r->flags; 6183 flagset = r->flagset; 6184 keep_state = r->keep_state; 6185 6186 LOOP_THROUGH(struct node_if, interface, interfaces, 6187 LOOP_THROUGH(struct node_proto, proto, protos, 6188 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 6189 LOOP_THROUGH(struct node_host, src_host, src_hosts, 6190 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 6191 LOOP_THROUGH(struct node_port, src_port, src_ports, 6192 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 6193 LOOP_THROUGH(struct node_os, src_os, src_oses, 6194 LOOP_THROUGH(struct node_uid, uid, uids, 6195 LOOP_THROUGH(struct node_gid, gid, gids, 6196 6197 r->af = af; 6198 6199 if (r->rule_flag & PFRULE_AFTO) { 6200 assert(nat != NULL); 6201 r->naf = nat->af; 6202 } 6203 6204 /* for link-local IPv6 address, interface must match up */ 6205 if ((r->af && src_host->af && r->af != src_host->af) || 6206 (r->af && dst_host->af && r->af != dst_host->af) || 6207 (src_host->af && dst_host->af && 6208 src_host->af != dst_host->af) || 6209 (src_host->ifindex && dst_host->ifindex && 6210 src_host->ifindex != dst_host->ifindex) || 6211 (src_host->ifindex && *interface->ifname && 6212 src_host->ifindex != ifa_nametoindex(interface->ifname)) || 6213 (dst_host->ifindex && *interface->ifname && 6214 dst_host->ifindex != ifa_nametoindex(interface->ifname))) 6215 continue; 6216 if (!r->af && src_host->af) 6217 r->af = src_host->af; 6218 else if (!r->af && dst_host->af) 6219 r->af = dst_host->af; 6220 6221 if (*interface->ifname) 6222 strlcpy(r->ifname, interface->ifname, 6223 sizeof(r->ifname)); 6224 else if (ifa_indextoname(src_host->ifindex, ifname)) 6225 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 6226 else if (ifa_indextoname(dst_host->ifindex, ifname)) 6227 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 6228 else 6229 memset(r->ifname, '\0', sizeof(r->ifname)); 6230 6231 memcpy(r->label, label, sizeof(r->label)); 6232 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 6233 sizeof(r->tagname)) 6234 errx(1, "expand_rule: strlcpy"); 6235 if (strlcpy(r->match_tagname, match_tagname, 6236 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 6237 errx(1, "expand_rule: strlcpy"); 6238 6239 osrch = odsth = NULL; 6240 if (src_host->addr.type == PF_ADDR_DYNIFTL) { 6241 osrch = src_host; 6242 if ((src_host = gen_dynnode(src_host, r->af)) == NULL) 6243 err(1, "expand_rule: calloc"); 6244 } 6245 if (dst_host->addr.type == PF_ADDR_DYNIFTL) { 6246 odsth = dst_host; 6247 if ((dst_host = gen_dynnode(dst_host, r->af)) == NULL) 6248 err(1, "expand_rule: calloc"); 6249 } 6250 6251 error += check_netmask(src_host, r->af); 6252 error += check_netmask(dst_host, r->af); 6253 6254 r->ifnot = interface->not; 6255 r->proto = proto->proto; 6256 r->src.addr = src_host->addr; 6257 r->src.neg = src_host->not; 6258 r->src.port[0] = src_port->port[0]; 6259 r->src.port[1] = src_port->port[1]; 6260 r->src.port_op = src_port->op; 6261 r->dst.addr = dst_host->addr; 6262 r->dst.neg = dst_host->not; 6263 r->dst.port[0] = dst_port->port[0]; 6264 r->dst.port[1] = dst_port->port[1]; 6265 r->dst.port_op = dst_port->op; 6266 r->uid.op = uid->op; 6267 r->uid.uid[0] = uid->uid[0]; 6268 r->uid.uid[1] = uid->uid[1]; 6269 r->gid.op = gid->op; 6270 r->gid.gid[0] = gid->gid[0]; 6271 r->gid.gid[1] = gid->gid[1]; 6272 if (rcv) { 6273 strlcpy(r->rcv_ifname, rcv->ifname, 6274 sizeof(r->rcv_ifname)); 6275 r->rcvifnot = rcv->not; 6276 } 6277 r->type = icmp_type->type; 6278 r->code = icmp_type->code; 6279 6280 if ((keep_state == PF_STATE_MODULATE || 6281 keep_state == PF_STATE_SYNPROXY) && 6282 r->proto && r->proto != IPPROTO_TCP) 6283 r->keep_state = PF_STATE_NORMAL; 6284 else 6285 r->keep_state = keep_state; 6286 6287 if (r->proto && r->proto != IPPROTO_TCP) { 6288 r->flags = 0; 6289 r->flagset = 0; 6290 } else { 6291 r->flags = flags; 6292 r->flagset = flagset; 6293 } 6294 if (icmp_type->proto && r->proto != icmp_type->proto) { 6295 yyerror("icmp-type mismatch"); 6296 error++; 6297 } 6298 6299 if (src_os && src_os->os) { 6300 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 6301 if ((pf->opts & PF_OPT_VERBOSE2) && 6302 r->os_fingerprint == PF_OSFP_NOMATCH) 6303 fprintf(stderr, 6304 "warning: unknown '%s' OS fingerprint\n", 6305 src_os->os); 6306 } else { 6307 r->os_fingerprint = PF_OSFP_ANY; 6308 } 6309 6310 if (r->action == PF_RDR) { 6311 error += apply_rdr_ports(r, &(r->rdr), rdr); 6312 } else if (r->action == PF_NAT) { 6313 error += apply_nat_ports(&(r->rdr), rdr); 6314 } 6315 6316 error += apply_redirspec(&(r->nat), nat); 6317 error += apply_redirspec(&(r->rdr), rdr); 6318 error += apply_redirspec(&(r->route), route); 6319 6320 r->nat.proxy_port[0] = PF_NAT_PROXY_PORT_LOW; 6321 r->nat.proxy_port[1] = PF_NAT_PROXY_PORT_HIGH; 6322 6323 if (rule_consistent(r, anchor_call[0]) < 0 || error) 6324 yyerror("skipping rule due to errors"); 6325 else { 6326 r->nr = pf->astack[pf->asd]->match++; 6327 pfctl_append_rule(pf, r, anchor_call); 6328 added++; 6329 } 6330 6331 if (osrch && src_host->addr.type == PF_ADDR_DYNIFTL) { 6332 free(src_host); 6333 src_host = osrch; 6334 } 6335 if (odsth && dst_host->addr.type == PF_ADDR_DYNIFTL) { 6336 free(dst_host); 6337 dst_host = odsth; 6338 } 6339 6340 )))))))))); 6341 6342 FREE_LIST(struct node_if, interfaces); 6343 FREE_LIST(struct node_proto, protos); 6344 FREE_LIST(struct node_host, src_hosts); 6345 FREE_LIST(struct node_port, src_ports); 6346 FREE_LIST(struct node_os, src_oses); 6347 FREE_LIST(struct node_host, dst_hosts); 6348 FREE_LIST(struct node_port, dst_ports); 6349 FREE_LIST(struct node_uid, uids); 6350 FREE_LIST(struct node_gid, gids); 6351 FREE_LIST(struct node_icmp, icmp_types); 6352 if (nat) { 6353 FREE_LIST(struct node_host, nat->host); 6354 free(nat); 6355 } 6356 if (rdr) { 6357 FREE_LIST(struct node_host, rdr->host); 6358 free(rdr); 6359 } 6360 if (route) { 6361 FREE_LIST(struct node_host, route->host); 6362 free(route); 6363 } 6364 6365 if (!added) 6366 yyerror("rule expands to no valid combination"); 6367 } 6368 6369 int 6370 expand_skip_interface(struct node_if *interfaces) 6371 { 6372 int errs = 0; 6373 6374 if (!interfaces || (!interfaces->next && !interfaces->not && 6375 !strcmp(interfaces->ifname, "none"))) { 6376 if (pf->opts & PF_OPT_VERBOSE) 6377 printf("set skip on none\n"); 6378 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0); 6379 return (errs); 6380 } 6381 6382 if (pf->opts & PF_OPT_VERBOSE) 6383 printf("set skip on {"); 6384 LOOP_THROUGH(struct node_if, interface, interfaces, 6385 if (pf->opts & PF_OPT_VERBOSE) 6386 printf(" %s", interface->ifname); 6387 if (interface->not) { 6388 yyerror("skip on ! <interface> is not supported"); 6389 errs++; 6390 } else 6391 errs += pfctl_set_interface_flags(pf, 6392 interface->ifname, PFI_IFLAG_SKIP, 1); 6393 ); 6394 if (pf->opts & PF_OPT_VERBOSE) 6395 printf(" }\n"); 6396 6397 FREE_LIST(struct node_if, interfaces); 6398 6399 if (errs) 6400 return (1); 6401 else 6402 return (0); 6403 } 6404 6405 void 6406 freehostlist(struct node_host *h) 6407 { 6408 FREE_LIST(struct node_host, h); 6409 } 6410 6411 #undef FREE_LIST 6412 #undef LOOP_THROUGH 6413 6414 int 6415 check_rulestate(int desired_state) 6416 { 6417 if (require_order && (rulestate > desired_state)) { 6418 yyerror("Rules must be in order: options, ethernet, " 6419 "normalization, queueing, translation, filtering"); 6420 return (1); 6421 } 6422 rulestate = desired_state; 6423 return (0); 6424 } 6425 6426 int 6427 kw_cmp(const void *k, const void *e) 6428 { 6429 return (strcmp(k, ((const struct keywords *)e)->k_name)); 6430 } 6431 6432 int 6433 lookup(char *s) 6434 { 6435 /* this has to be sorted always */ 6436 static const struct keywords keywords[] = { 6437 { "af-to", AFTO}, 6438 { "all", ALL}, 6439 { "allow-opts", ALLOWOPTS}, 6440 { "allow-related", ALLOW_RELATED}, 6441 { "altq", ALTQ}, 6442 { "anchor", ANCHOR}, 6443 { "antispoof", ANTISPOOF}, 6444 { "any", ANY}, 6445 { "bandwidth", BANDWIDTH}, 6446 { "binat", BINAT}, 6447 { "binat-anchor", BINATANCHOR}, 6448 { "bitmask", BITMASK}, 6449 { "block", BLOCK}, 6450 { "block-policy", BLOCKPOLICY}, 6451 { "bridge-to", BRIDGE_TO}, 6452 { "buckets", BUCKETS}, 6453 { "cbq", CBQ}, 6454 { "code", CODE}, 6455 { "codelq", CODEL}, 6456 { "debug", DEBUG}, 6457 { "divert-reply", DIVERTREPLY}, 6458 { "divert-to", DIVERTTO}, 6459 { "dnpipe", DNPIPE}, 6460 { "dnqueue", DNQUEUE}, 6461 { "drop", DROP}, 6462 { "dup-to", DUPTO}, 6463 { "endpoint-independent", ENDPI}, 6464 { "ether", ETHER}, 6465 { "fail-policy", FAILPOLICY}, 6466 { "fairq", FAIRQ}, 6467 { "fastroute", FASTROUTE}, 6468 { "file", FILENAME}, 6469 { "fingerprints", FINGERPRINTS}, 6470 { "flags", FLAGS}, 6471 { "floating", FLOATING}, 6472 { "flush", FLUSH}, 6473 { "for", FOR}, 6474 { "fragment", FRAGMENT}, 6475 { "from", FROM}, 6476 { "global", GLOBAL}, 6477 { "group", GROUP}, 6478 { "hfsc", HFSC}, 6479 { "hogs", HOGS}, 6480 { "hostid", HOSTID}, 6481 { "icmp-type", ICMPTYPE}, 6482 { "icmp6-type", ICMP6TYPE}, 6483 { "if-bound", IFBOUND}, 6484 { "in", IN}, 6485 { "include", INCLUDE}, 6486 { "inet", INET}, 6487 { "inet6", INET6}, 6488 { "interval", INTERVAL}, 6489 { "keep", KEEP}, 6490 { "keepcounters", KEEPCOUNTERS}, 6491 { "l3", L3}, 6492 { "label", LABEL}, 6493 { "limit", LIMIT}, 6494 { "linkshare", LINKSHARE}, 6495 { "load", LOAD}, 6496 { "log", LOG}, 6497 { "loginterface", LOGINTERFACE}, 6498 { "map-e-portset", MAPEPORTSET}, 6499 { "match", MATCH}, 6500 { "matches", MATCHES}, 6501 { "max", MAXIMUM}, 6502 { "max-mss", MAXMSS}, 6503 { "max-src-conn", MAXSRCCONN}, 6504 { "max-src-conn-rate", MAXSRCCONNRATE}, 6505 { "max-src-nodes", MAXSRCNODES}, 6506 { "max-src-states", MAXSRCSTATES}, 6507 { "min-ttl", MINTTL}, 6508 { "modulate", MODULATE}, 6509 { "nat", NAT}, 6510 { "nat-anchor", NATANCHOR}, 6511 { "no", NO}, 6512 { "no-df", NODF}, 6513 { "no-route", NOROUTE}, 6514 { "no-sync", NOSYNC}, 6515 { "on", ON}, 6516 { "optimization", OPTIMIZATION}, 6517 { "os", OS}, 6518 { "out", OUT}, 6519 { "overload", OVERLOAD}, 6520 { "pass", PASS}, 6521 { "pflow", PFLOW}, 6522 { "port", PORT}, 6523 { "prio", PRIO}, 6524 { "priority", PRIORITY}, 6525 { "priq", PRIQ}, 6526 { "probability", PROBABILITY}, 6527 { "proto", PROTO}, 6528 { "qlimit", QLIMIT}, 6529 { "queue", QUEUE}, 6530 { "quick", QUICK}, 6531 { "random", RANDOM}, 6532 { "random-id", RANDOMID}, 6533 { "rdr", RDR}, 6534 { "rdr-anchor", RDRANCHOR}, 6535 { "realtime", REALTIME}, 6536 { "reassemble", REASSEMBLE}, 6537 { "received-on", RECEIVEDON}, 6538 { "reply-to", REPLYTO}, 6539 { "require-order", REQUIREORDER}, 6540 { "return", RETURN}, 6541 { "return-icmp", RETURNICMP}, 6542 { "return-icmp6", RETURNICMP6}, 6543 { "return-rst", RETURNRST}, 6544 { "ridentifier", RIDENTIFIER}, 6545 { "round-robin", ROUNDROBIN}, 6546 { "route", ROUTE}, 6547 { "route-to", ROUTETO}, 6548 { "rtable", RTABLE}, 6549 { "rule", RULE}, 6550 { "ruleset-optimization", RULESET_OPTIMIZATION}, 6551 { "scrub", SCRUB}, 6552 { "set", SET}, 6553 { "set-tos", SETTOS}, 6554 { "skip", SKIP}, 6555 { "sloppy", SLOPPY}, 6556 { "source-hash", SOURCEHASH}, 6557 { "source-track", SOURCETRACK}, 6558 { "state", STATE}, 6559 { "state-defaults", STATEDEFAULTS}, 6560 { "state-policy", STATEPOLICY}, 6561 { "static-port", STATICPORT}, 6562 { "sticky-address", STICKYADDRESS}, 6563 { "syncookies", SYNCOOKIES}, 6564 { "synproxy", SYNPROXY}, 6565 { "table", TABLE}, 6566 { "tag", TAG}, 6567 { "tagged", TAGGED}, 6568 { "target", TARGET}, 6569 { "tbrsize", TBRSIZE}, 6570 { "timeout", TIMEOUT}, 6571 { "to", TO}, 6572 { "tos", TOS}, 6573 { "ttl", TTL}, 6574 { "upperlimit", UPPERLIMIT}, 6575 { "urpf-failed", URPFFAILED}, 6576 { "user", USER}, 6577 }; 6578 const struct keywords *p; 6579 6580 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 6581 sizeof(keywords[0]), kw_cmp); 6582 6583 if (p) { 6584 if (debug > 1) 6585 fprintf(stderr, "%s: %d\n", s, p->k_val); 6586 return (p->k_val); 6587 } else { 6588 if (debug > 1) 6589 fprintf(stderr, "string: %s\n", s); 6590 return (STRING); 6591 } 6592 } 6593 6594 #define MAXPUSHBACK 128 6595 6596 static char *parsebuf; 6597 static int parseindex; 6598 static char pushback_buffer[MAXPUSHBACK]; 6599 static int pushback_index = 0; 6600 6601 int 6602 lgetc(int quotec) 6603 { 6604 int c, next; 6605 6606 if (parsebuf) { 6607 /* Read character from the parsebuffer instead of input. */ 6608 if (parseindex >= 0) { 6609 c = parsebuf[parseindex++]; 6610 if (c != '\0') 6611 return (c); 6612 parsebuf = NULL; 6613 } else 6614 parseindex++; 6615 } 6616 6617 if (pushback_index) 6618 return (pushback_buffer[--pushback_index]); 6619 6620 if (quotec) { 6621 if ((c = getc(file->stream)) == EOF) { 6622 yyerror("reached end of file while parsing quoted string"); 6623 if (popfile() == EOF) 6624 return (EOF); 6625 return (quotec); 6626 } 6627 return (c); 6628 } 6629 6630 while ((c = getc(file->stream)) == '\\') { 6631 next = getc(file->stream); 6632 if (next != '\n') { 6633 c = next; 6634 break; 6635 } 6636 yylval.lineno = file->lineno; 6637 file->lineno++; 6638 } 6639 6640 while (c == EOF) { 6641 if (popfile() == EOF) 6642 return (EOF); 6643 c = getc(file->stream); 6644 } 6645 return (c); 6646 } 6647 6648 int 6649 lungetc(int c) 6650 { 6651 if (c == EOF) 6652 return (EOF); 6653 if (parsebuf) { 6654 parseindex--; 6655 if (parseindex >= 0) 6656 return (c); 6657 } 6658 if (pushback_index < MAXPUSHBACK-1) 6659 return (pushback_buffer[pushback_index++] = c); 6660 else 6661 return (EOF); 6662 } 6663 6664 int 6665 findeol(void) 6666 { 6667 int c; 6668 6669 parsebuf = NULL; 6670 6671 /* skip to either EOF or the first real EOL */ 6672 while (1) { 6673 if (pushback_index) 6674 c = pushback_buffer[--pushback_index]; 6675 else 6676 c = lgetc(0); 6677 if (c == '\n') { 6678 file->lineno++; 6679 break; 6680 } 6681 if (c == EOF) 6682 break; 6683 } 6684 return (ERROR); 6685 } 6686 6687 int 6688 yylex(void) 6689 { 6690 char buf[8096]; 6691 char *p, *val; 6692 int quotec, next, c; 6693 int token; 6694 6695 top: 6696 p = buf; 6697 while ((c = lgetc(0)) == ' ' || c == '\t') 6698 ; /* nothing */ 6699 6700 yylval.lineno = file->lineno; 6701 if (c == '#') 6702 while ((c = lgetc(0)) != '\n' && c != EOF) 6703 ; /* nothing */ 6704 if (c == '$' && parsebuf == NULL) { 6705 while (1) { 6706 if ((c = lgetc(0)) == EOF) 6707 return (0); 6708 6709 if (p + 1 >= buf + sizeof(buf) - 1) { 6710 yyerror("string too long"); 6711 return (findeol()); 6712 } 6713 if (isalnum(c) || c == '_') { 6714 *p++ = (char)c; 6715 continue; 6716 } 6717 *p = '\0'; 6718 lungetc(c); 6719 break; 6720 } 6721 val = symget(buf); 6722 if (val == NULL) { 6723 yyerror("macro '%s' not defined", buf); 6724 return (findeol()); 6725 } 6726 parsebuf = val; 6727 parseindex = 0; 6728 goto top; 6729 } 6730 6731 switch (c) { 6732 case '\'': 6733 case '"': 6734 quotec = c; 6735 while (1) { 6736 if ((c = lgetc(quotec)) == EOF) 6737 return (0); 6738 if (c == '\n') { 6739 file->lineno++; 6740 continue; 6741 } else if (c == '\\') { 6742 if ((next = lgetc(quotec)) == EOF) 6743 return (0); 6744 if (next == quotec || c == ' ' || c == '\t') 6745 c = next; 6746 else if (next == '\n') { 6747 file->lineno++; 6748 continue; 6749 } 6750 else 6751 lungetc(next); 6752 } else if (c == quotec) { 6753 *p = '\0'; 6754 break; 6755 } else if (c == '\0') { 6756 yyerror("syntax error"); 6757 return (findeol()); 6758 } 6759 if (p + 1 >= buf + sizeof(buf) - 1) { 6760 yyerror("string too long"); 6761 return (findeol()); 6762 } 6763 *p++ = (char)c; 6764 } 6765 yylval.v.string = strdup(buf); 6766 if (yylval.v.string == NULL) 6767 err(1, "yylex: strdup"); 6768 return (STRING); 6769 case '!': 6770 next = lgetc(0); 6771 if (next == '=') 6772 return (NE); 6773 lungetc(next); 6774 break; 6775 case '<': 6776 next = lgetc(0); 6777 if (next == '>') { 6778 yylval.v.i = PF_OP_XRG; 6779 return (PORTBINARY); 6780 } else if (next == '=') 6781 return (LE); 6782 lungetc(next); 6783 break; 6784 case '>': 6785 next = lgetc(0); 6786 if (next == '<') { 6787 yylval.v.i = PF_OP_IRG; 6788 return (PORTBINARY); 6789 } else if (next == '=') 6790 return (GE); 6791 lungetc(next); 6792 break; 6793 case '-': 6794 next = lgetc(0); 6795 if (next == '>') 6796 return (ARROW); 6797 lungetc(next); 6798 break; 6799 } 6800 6801 #define allowed_to_end_number(x) \ 6802 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 6803 6804 if (c == '-' || isdigit(c)) { 6805 do { 6806 *p++ = c; 6807 if ((unsigned)(p-buf) >= sizeof(buf)) { 6808 yyerror("string too long"); 6809 return (findeol()); 6810 } 6811 } while ((c = lgetc(0)) != EOF && isdigit(c)); 6812 lungetc(c); 6813 if (p == buf + 1 && buf[0] == '-') 6814 goto nodigits; 6815 if (c == EOF || allowed_to_end_number(c)) { 6816 const char *errstr = NULL; 6817 6818 *p = '\0'; 6819 yylval.v.number = strtonum(buf, LLONG_MIN, 6820 LLONG_MAX, &errstr); 6821 if (errstr) { 6822 yyerror("\"%s\" invalid number: %s", 6823 buf, errstr); 6824 return (findeol()); 6825 } 6826 return (NUMBER); 6827 } else { 6828 nodigits: 6829 while (p > buf + 1) 6830 lungetc(*--p); 6831 c = *--p; 6832 if (c == '-') 6833 return (c); 6834 } 6835 } 6836 6837 #define allowed_in_string(x) \ 6838 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 6839 x != '{' && x != '}' && x != '<' && x != '>' && \ 6840 x != '!' && x != '=' && x != '/' && x != '#' && \ 6841 x != ',')) 6842 6843 if (isalnum(c) || c == ':' || c == '_') { 6844 do { 6845 *p++ = c; 6846 if ((unsigned)(p-buf) >= sizeof(buf)) { 6847 yyerror("string too long"); 6848 return (findeol()); 6849 } 6850 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 6851 lungetc(c); 6852 *p = '\0'; 6853 if ((token = lookup(buf)) == STRING) 6854 if ((yylval.v.string = strdup(buf)) == NULL) 6855 err(1, "yylex: strdup"); 6856 return (token); 6857 } 6858 if (c == '\n') { 6859 yylval.lineno = file->lineno; 6860 file->lineno++; 6861 } 6862 if (c == EOF) 6863 return (0); 6864 return (c); 6865 } 6866 6867 int 6868 check_file_secrecy(int fd, const char *fname) 6869 { 6870 struct stat st; 6871 6872 if (fstat(fd, &st)) { 6873 warn("cannot stat %s", fname); 6874 return (-1); 6875 } 6876 if (st.st_uid != 0 && st.st_uid != getuid()) { 6877 warnx("%s: owner not root or current user", fname); 6878 return (-1); 6879 } 6880 if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) { 6881 warnx("%s: group writable or world read/writable", fname); 6882 return (-1); 6883 } 6884 return (0); 6885 } 6886 6887 struct file * 6888 pushfile(const char *name, int secret) 6889 { 6890 struct file *nfile; 6891 6892 if ((nfile = calloc(1, sizeof(struct file))) == NULL || 6893 (nfile->name = strdup(name)) == NULL) { 6894 warn("malloc"); 6895 return (NULL); 6896 } 6897 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 6898 nfile->stream = stdin; 6899 free(nfile->name); 6900 if ((nfile->name = strdup("stdin")) == NULL) { 6901 warn("strdup"); 6902 free(nfile); 6903 return (NULL); 6904 } 6905 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 6906 warn("%s", nfile->name); 6907 free(nfile->name); 6908 free(nfile); 6909 return (NULL); 6910 } else if (secret && 6911 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 6912 fclose(nfile->stream); 6913 free(nfile->name); 6914 free(nfile); 6915 return (NULL); 6916 } 6917 nfile->lineno = 1; 6918 TAILQ_INSERT_TAIL(&files, nfile, entry); 6919 return (nfile); 6920 } 6921 6922 int 6923 popfile(void) 6924 { 6925 struct file *prev; 6926 6927 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) { 6928 prev->errors += file->errors; 6929 TAILQ_REMOVE(&files, file, entry); 6930 fclose(file->stream); 6931 free(file->name); 6932 free(file); 6933 file = prev; 6934 return (0); 6935 } 6936 return (EOF); 6937 } 6938 6939 int 6940 parse_config(char *filename, struct pfctl *xpf) 6941 { 6942 int errors = 0; 6943 struct sym *sym; 6944 6945 pf = xpf; 6946 errors = 0; 6947 rulestate = PFCTL_STATE_NONE; 6948 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 6949 returnicmp6default = 6950 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 6951 blockpolicy = PFRULE_DROP; 6952 failpolicy = PFRULE_DROP; 6953 require_order = 1; 6954 6955 if ((file = pushfile(filename, 0)) == NULL) { 6956 warn("cannot open the main config file!"); 6957 return (-1); 6958 } 6959 6960 yyparse(); 6961 errors = file->errors; 6962 popfile(); 6963 6964 /* Free macros and check which have not been used. */ 6965 while ((sym = TAILQ_FIRST(&symhead))) { 6966 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 6967 fprintf(stderr, "warning: macro '%s' not " 6968 "used\n", sym->nam); 6969 free(sym->nam); 6970 free(sym->val); 6971 TAILQ_REMOVE(&symhead, sym, entry); 6972 free(sym); 6973 } 6974 6975 return (errors ? -1 : 0); 6976 } 6977 6978 int 6979 symset(const char *nam, const char *val, int persist) 6980 { 6981 struct sym *sym; 6982 6983 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 6984 sym = TAILQ_NEXT(sym, entry)) 6985 ; /* nothing */ 6986 6987 if (sym != NULL) { 6988 if (sym->persist == 1) 6989 return (0); 6990 else { 6991 free(sym->nam); 6992 free(sym->val); 6993 TAILQ_REMOVE(&symhead, sym, entry); 6994 free(sym); 6995 } 6996 } 6997 if ((sym = calloc(1, sizeof(*sym))) == NULL) 6998 return (-1); 6999 7000 sym->nam = strdup(nam); 7001 if (sym->nam == NULL) { 7002 free(sym); 7003 return (-1); 7004 } 7005 sym->val = strdup(val); 7006 if (sym->val == NULL) { 7007 free(sym->nam); 7008 free(sym); 7009 return (-1); 7010 } 7011 sym->used = 0; 7012 sym->persist = persist; 7013 TAILQ_INSERT_TAIL(&symhead, sym, entry); 7014 return (0); 7015 } 7016 7017 int 7018 pfctl_cmdline_symset(char *s) 7019 { 7020 char *sym, *val; 7021 int ret; 7022 7023 if ((val = strrchr(s, '=')) == NULL) 7024 return (-1); 7025 7026 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL) 7027 err(1, "pfctl_cmdline_symset: malloc"); 7028 7029 strlcpy(sym, s, strlen(s) - strlen(val) + 1); 7030 7031 ret = symset(sym, val + 1, 1); 7032 free(sym); 7033 7034 return (ret); 7035 } 7036 7037 char * 7038 symget(const char *nam) 7039 { 7040 struct sym *sym; 7041 7042 TAILQ_FOREACH(sym, &symhead, entry) 7043 if (strcmp(nam, sym->nam) == 0) { 7044 sym->used = 1; 7045 return (sym->val); 7046 } 7047 return (NULL); 7048 } 7049 7050 void 7051 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst) 7052 { 7053 int i; 7054 struct pfctl_rule *r; 7055 7056 for (i = 0; i < PF_RULESET_MAX; ++i) { 7057 while ((r = TAILQ_FIRST(src->rules[i].active.ptr)) 7058 != NULL) { 7059 TAILQ_REMOVE(src->rules[i].active.ptr, r, entries); 7060 TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries); 7061 dst->anchor->match++; 7062 } 7063 src->anchor->match = 0; 7064 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr)) 7065 != NULL) { 7066 TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries); 7067 TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr, 7068 r, entries); 7069 } 7070 } 7071 } 7072 7073 void 7074 mv_eth_rules(struct pfctl_eth_ruleset *src, struct pfctl_eth_ruleset *dst) 7075 { 7076 struct pfctl_eth_rule *r; 7077 7078 while ((r = TAILQ_FIRST(&src->rules)) != NULL) { 7079 TAILQ_REMOVE(&src->rules, r, entries); 7080 TAILQ_INSERT_TAIL(&dst->rules, r, entries); 7081 dst->anchor->match++; 7082 } 7083 src->anchor->match = 0; 7084 } 7085 7086 void 7087 decide_address_family(struct node_host *n, sa_family_t *af) 7088 { 7089 if (*af != 0 || n == NULL) 7090 return; 7091 *af = n->af; 7092 while ((n = n->next) != NULL) { 7093 if (n->af != *af) { 7094 *af = 0; 7095 return; 7096 } 7097 } 7098 } 7099 7100 void 7101 remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 7102 { 7103 struct node_host *n = *nh, *prev = NULL; 7104 7105 while (n != NULL) { 7106 if (*af && n->af && n->af != *af) { 7107 /* unlink and free n */ 7108 struct node_host *next = n->next; 7109 7110 /* adjust tail pointer */ 7111 if (n == (*nh)->tail) 7112 (*nh)->tail = prev; 7113 /* adjust previous node's next pointer */ 7114 if (prev == NULL) 7115 *nh = next; 7116 else 7117 prev->next = next; 7118 /* free node */ 7119 if (n->ifname != NULL) 7120 free(n->ifname); 7121 free(n); 7122 n = next; 7123 } else { 7124 if (n->af && !*af) 7125 *af = n->af; 7126 prev = n; 7127 n = n->next; 7128 } 7129 } 7130 } 7131 7132 int 7133 invalid_redirect(struct node_host *nh, sa_family_t af) 7134 { 7135 if (!af) { 7136 struct node_host *n; 7137 7138 /* tables and dyniftl are ok without an address family */ 7139 for (n = nh; n != NULL; n = n->next) { 7140 if (n->addr.type != PF_ADDR_TABLE && 7141 n->addr.type != PF_ADDR_DYNIFTL) { 7142 yyerror("address family not given and " 7143 "translation address expands to multiple " 7144 "address families"); 7145 return (1); 7146 } 7147 } 7148 } 7149 if (nh == NULL) { 7150 yyerror("no translation address with matching address family " 7151 "found."); 7152 return (1); 7153 } 7154 return (0); 7155 } 7156 7157 int 7158 atoul(char *s, u_long *ulvalp) 7159 { 7160 u_long ulval; 7161 char *ep; 7162 7163 errno = 0; 7164 ulval = strtoul(s, &ep, 0); 7165 if (s[0] == '\0' || *ep != '\0') 7166 return (-1); 7167 if (errno == ERANGE && ulval == ULONG_MAX) 7168 return (-1); 7169 *ulvalp = ulval; 7170 return (0); 7171 } 7172 7173 int 7174 getservice(char *n) 7175 { 7176 struct servent *s; 7177 u_long ulval; 7178 7179 if (atoul(n, &ulval) == 0) { 7180 if (ulval > 65535) { 7181 yyerror("illegal port value %lu", ulval); 7182 return (-1); 7183 } 7184 return (htons(ulval)); 7185 } else { 7186 s = getservbyname(n, "tcp"); 7187 if (s == NULL) 7188 s = getservbyname(n, "udp"); 7189 if (s == NULL) 7190 s = getservbyname(n, "sctp"); 7191 if (s == NULL) { 7192 yyerror("unknown port %s", n); 7193 return (-1); 7194 } 7195 return (s->s_port); 7196 } 7197 } 7198 7199 int 7200 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 7201 { 7202 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 7203 if (s[i] == NULL) 7204 return (0); 7205 7206 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 7207 sizeof(r->label[0])) { 7208 yyerror("rule label too long (max %d chars)", 7209 sizeof(r->label[0])-1); 7210 return (-1); 7211 } 7212 } 7213 return (0); 7214 } 7215 7216 int 7217 eth_rule_label(struct pfctl_eth_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 7218 { 7219 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 7220 if (s[i] == NULL) 7221 return (0); 7222 7223 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 7224 sizeof(r->label[0])) { 7225 yyerror("rule label too long (max %d chars)", 7226 sizeof(r->label[0])-1); 7227 return (-1); 7228 } 7229 } 7230 return (0); 7231 } 7232 7233 u_int16_t 7234 parseicmpspec(char *w, sa_family_t af) 7235 { 7236 const struct icmpcodeent *p; 7237 u_long ulval; 7238 u_int8_t icmptype; 7239 7240 if (af == AF_INET) 7241 icmptype = returnicmpdefault >> 8; 7242 else 7243 icmptype = returnicmp6default >> 8; 7244 7245 if (atoul(w, &ulval) == -1) { 7246 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 7247 yyerror("unknown icmp code %s", w); 7248 return (0); 7249 } 7250 ulval = p->code; 7251 } 7252 if (ulval > 255) { 7253 yyerror("invalid icmp code %lu", ulval); 7254 return (0); 7255 } 7256 return (icmptype << 8 | ulval); 7257 } 7258 7259 int 7260 parseport(char *port, struct range *r, int extensions) 7261 { 7262 char *p = strchr(port, ':'); 7263 7264 if (p == NULL) { 7265 if ((r->a = getservice(port)) == -1) 7266 return (-1); 7267 r->b = 0; 7268 r->t = PF_OP_NONE; 7269 return (0); 7270 } 7271 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) { 7272 *p = 0; 7273 if ((r->a = getservice(port)) == -1) 7274 return (-1); 7275 r->b = 0; 7276 r->t = PF_OP_IRG; 7277 return (0); 7278 } 7279 if ((extensions & PPORT_RANGE)) { 7280 *p++ = 0; 7281 if ((r->a = getservice(port)) == -1 || 7282 (r->b = getservice(p)) == -1) 7283 return (-1); 7284 if (r->a == r->b) { 7285 r->b = 0; 7286 r->t = PF_OP_NONE; 7287 } else 7288 r->t = PF_OP_RRG; 7289 return (0); 7290 } 7291 return (-1); 7292 } 7293 7294 int 7295 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans) 7296 { 7297 struct loadanchors *la; 7298 7299 TAILQ_FOREACH(la, &loadanchorshead, entries) { 7300 if (pf->opts & PF_OPT_VERBOSE) 7301 fprintf(stderr, "\nLoading anchor %s from %s\n", 7302 la->anchorname, la->filename); 7303 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize, 7304 la->anchorname, trans) == -1) 7305 return (-1); 7306 } 7307 7308 return (0); 7309 } 7310 7311 int 7312 kw_casecmp(const void *k, const void *e) 7313 { 7314 return (strcasecmp(k, ((const struct keywords *)e)->k_name)); 7315 } 7316 7317 int 7318 map_tos(char *s, int *val) 7319 { 7320 /* DiffServ Codepoints and other TOS mappings */ 7321 const struct keywords toswords[] = { 7322 { "af11", IPTOS_DSCP_AF11 }, 7323 { "af12", IPTOS_DSCP_AF12 }, 7324 { "af13", IPTOS_DSCP_AF13 }, 7325 { "af21", IPTOS_DSCP_AF21 }, 7326 { "af22", IPTOS_DSCP_AF22 }, 7327 { "af23", IPTOS_DSCP_AF23 }, 7328 { "af31", IPTOS_DSCP_AF31 }, 7329 { "af32", IPTOS_DSCP_AF32 }, 7330 { "af33", IPTOS_DSCP_AF33 }, 7331 { "af41", IPTOS_DSCP_AF41 }, 7332 { "af42", IPTOS_DSCP_AF42 }, 7333 { "af43", IPTOS_DSCP_AF43 }, 7334 { "critical", IPTOS_PREC_CRITIC_ECP }, 7335 { "cs0", IPTOS_DSCP_CS0 }, 7336 { "cs1", IPTOS_DSCP_CS1 }, 7337 { "cs2", IPTOS_DSCP_CS2 }, 7338 { "cs3", IPTOS_DSCP_CS3 }, 7339 { "cs4", IPTOS_DSCP_CS4 }, 7340 { "cs5", IPTOS_DSCP_CS5 }, 7341 { "cs6", IPTOS_DSCP_CS6 }, 7342 { "cs7", IPTOS_DSCP_CS7 }, 7343 { "ef", IPTOS_DSCP_EF }, 7344 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL }, 7345 { "lowdelay", IPTOS_LOWDELAY }, 7346 { "netcontrol", IPTOS_PREC_NETCONTROL }, 7347 { "reliability", IPTOS_RELIABILITY }, 7348 { "throughput", IPTOS_THROUGHPUT }, 7349 { "va", IPTOS_DSCP_VA } 7350 }; 7351 const struct keywords *p; 7352 7353 p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]), 7354 sizeof(toswords[0]), kw_casecmp); 7355 7356 if (p) { 7357 *val = p->k_val; 7358 return (1); 7359 } 7360 return (0); 7361 } 7362 7363 int 7364 rt_tableid_max(void) 7365 { 7366 #ifdef __FreeBSD__ 7367 int fibs; 7368 size_t l = sizeof(fibs); 7369 7370 if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1) 7371 fibs = 16; /* XXX RT_MAXFIBS, at least limit it some. */ 7372 /* 7373 * As the OpenBSD code only compares > and not >= we need to adjust 7374 * here given we only accept values of 0..n and want to avoid #ifdefs 7375 * in the grammar. 7376 */ 7377 return (fibs - 1); 7378 #else 7379 return (RT_TABLEID_MAX); 7380 #endif 7381 } 7382 7383 struct node_mac* 7384 node_mac_from_string(const char *str) 7385 { 7386 struct node_mac *m; 7387 7388 m = calloc(1, sizeof(struct node_mac)); 7389 if (m == NULL) 7390 err(1, "mac: calloc"); 7391 7392 if (sscanf(str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 7393 &m->mac[0], &m->mac[1], &m->mac[2], &m->mac[3], &m->mac[4], 7394 &m->mac[5]) != 6) { 7395 free(m); 7396 yyerror("invalid MAC address"); 7397 return (NULL); 7398 } 7399 7400 memset(m->mask, 0xff, ETHER_ADDR_LEN); 7401 m->isset = true; 7402 m->next = NULL; 7403 m->tail = m; 7404 7405 return (m); 7406 } 7407 7408 struct node_mac* 7409 node_mac_from_string_masklen(const char *str, int masklen) 7410 { 7411 struct node_mac *m; 7412 7413 if (masklen < 0 || masklen > (ETHER_ADDR_LEN * 8)) { 7414 yyerror("invalid MAC mask length"); 7415 return (NULL); 7416 } 7417 7418 m = node_mac_from_string(str); 7419 if (m == NULL) 7420 return (NULL); 7421 7422 memset(m->mask, 0, ETHER_ADDR_LEN); 7423 for (int i = 0; i < masklen; i++) 7424 m->mask[i / 8] |= 1 << (i % 8); 7425 7426 return (m); 7427 } 7428 7429 struct node_mac* 7430 node_mac_from_string_mask(const char *str, const char *mask) 7431 { 7432 struct node_mac *m; 7433 7434 m = node_mac_from_string(str); 7435 if (m == NULL) 7436 return (NULL); 7437 7438 if (sscanf(mask, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 7439 &m->mask[0], &m->mask[1], &m->mask[2], &m->mask[3], &m->mask[4], 7440 &m->mask[5]) != 6) { 7441 free(m); 7442 yyerror("invalid MAC mask"); 7443 return (NULL); 7444 } 7445 7446 return (m); 7447 } 7448