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 size_t ungetpos; 93 size_t ungetsize; 94 u_char *ungetbuf; 95 int eof_reached; 96 int lineno; 97 int errors; 98 } *file, *topfile; 99 struct file *pushfile(const char *, int); 100 int popfile(void); 101 int check_file_secrecy(int, const char *); 102 int yyparse(void); 103 int yylex(void); 104 int yyerror(const char *, ...); 105 int kw_cmp(const void *, const void *); 106 int lookup(char *); 107 int igetc(void); 108 int lgetc(int); 109 void lungetc(int); 110 int findeol(void); 111 112 static TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 113 struct sym { 114 TAILQ_ENTRY(sym) entry; 115 int used; 116 int persist; 117 char *nam; 118 char *val; 119 }; 120 int symset(const char *, const char *, int); 121 char *symget(const char *); 122 123 int atoul(char *, u_long *); 124 125 enum { 126 PFCTL_STATE_NONE, 127 PFCTL_STATE_OPTION, 128 PFCTL_STATE_ETHER, 129 PFCTL_STATE_SCRUB, 130 PFCTL_STATE_QUEUE, 131 PFCTL_STATE_NAT, 132 PFCTL_STATE_FILTER 133 }; 134 135 struct node_etherproto { 136 u_int16_t proto; 137 struct node_etherproto *next; 138 struct node_etherproto *tail; 139 }; 140 141 struct node_proto { 142 u_int8_t proto; 143 struct node_proto *next; 144 struct node_proto *tail; 145 }; 146 147 struct node_port { 148 u_int16_t port[2]; 149 u_int8_t op; 150 struct node_port *next; 151 struct node_port *tail; 152 }; 153 154 struct node_uid { 155 uid_t uid[2]; 156 u_int8_t op; 157 struct node_uid *next; 158 struct node_uid *tail; 159 }; 160 161 struct node_gid { 162 gid_t gid[2]; 163 u_int8_t op; 164 struct node_gid *next; 165 struct node_gid *tail; 166 }; 167 168 struct node_icmp { 169 uint16_t code; 170 uint16_t type; 171 u_int8_t proto; 172 struct node_icmp *next; 173 struct node_icmp *tail; 174 }; 175 176 enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK, 177 PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN, 178 PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES, 179 PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK, 180 PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, 181 PF_STATE_OPT_PFLOW, PF_STATE_OPT_ALLOW_RELATED }; 182 183 enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE }; 184 185 struct node_state_opt { 186 int type; 187 union { 188 u_int32_t max_states; 189 u_int32_t max_src_states; 190 u_int32_t max_src_conn; 191 struct { 192 u_int32_t limit; 193 u_int32_t seconds; 194 } max_src_conn_rate; 195 struct { 196 u_int8_t flush; 197 char tblname[PF_TABLE_NAME_SIZE]; 198 } overload; 199 u_int32_t max_src_nodes; 200 u_int8_t src_track; 201 u_int32_t statelock; 202 struct { 203 int number; 204 u_int32_t seconds; 205 } timeout; 206 } data; 207 struct node_state_opt *next; 208 struct node_state_opt *tail; 209 }; 210 211 struct peer { 212 struct node_host *host; 213 struct node_port *port; 214 }; 215 216 static struct node_queue { 217 char queue[PF_QNAME_SIZE]; 218 char parent[PF_QNAME_SIZE]; 219 char ifname[IFNAMSIZ]; 220 int scheduler; 221 struct node_queue *next; 222 struct node_queue *tail; 223 } *queues = NULL; 224 225 struct node_qassign { 226 char *qname; 227 char *pqname; 228 }; 229 230 struct range { 231 int a; 232 int b; 233 int t; 234 }; 235 236 static struct pool_opts { 237 int marker; 238 #define POM_TYPE 0x01 239 #define POM_STICKYADDRESS 0x02 240 #define POM_ENDPI 0x04 241 #define POM_IPV6NH 0x08 242 u_int8_t opts; 243 int type; 244 int staticport; 245 struct pf_poolhashkey *key; 246 struct pf_mape_portset mape; 247 } pool_opts; 248 249 struct redirspec { 250 struct node_host *host; 251 struct range rport; 252 struct pool_opts pool_opts; 253 sa_family_t af; 254 bool binat; 255 }; 256 257 static struct filter_opts { 258 int marker; 259 #define FOM_FLAGS 0x0001 260 #define FOM_ICMP 0x0002 261 #define FOM_TOS 0x0004 262 #define FOM_KEEP 0x0008 263 #define FOM_SRCTRACK 0x0010 264 #define FOM_MINTTL 0x0020 265 #define FOM_MAXMSS 0x0040 266 #define FOM_AFTO 0x0080 267 #define FOM_SETTOS 0x0100 268 #define FOM_SCRUB_TCP 0x0200 269 #define FOM_SETPRIO 0x0400 270 #define FOM_ONCE 0x1000 /* not yet implemmented */ 271 #define FOM_PRIO 0x2000 272 #define FOM_SETDELAY 0x4000 273 #define FOM_FRAGCACHE 0x8000 /* does not exist in OpenBSD */ 274 struct node_uid *uid; 275 struct node_gid *gid; 276 struct node_if *rcv; 277 struct { 278 u_int8_t b1; 279 u_int8_t b2; 280 u_int16_t w; 281 u_int16_t w2; 282 } flags; 283 struct node_icmp *icmpspec; 284 u_int32_t tos; 285 u_int32_t prob; 286 u_int32_t ridentifier; 287 struct { 288 int action; 289 struct node_state_opt *options; 290 } keep; 291 int fragment; 292 int allowopts; 293 char *label[PF_RULE_MAX_LABEL_COUNT]; 294 int labelcount; 295 struct node_qassign queues; 296 char *tag; 297 char *match_tag; 298 u_int8_t match_tag_not; 299 u_int16_t dnpipe; 300 u_int16_t dnrpipe; 301 u_int32_t free_flags; 302 u_int rtableid; 303 u_int8_t prio; 304 u_int8_t set_prio[2]; 305 struct { 306 struct node_host *addr; 307 u_int16_t port; 308 } divert; 309 struct redirspec *nat; 310 struct redirspec *rdr; 311 /* new-style scrub opts */ 312 int nodf; 313 int minttl; 314 int settos; 315 int randomid; 316 int max_mss; 317 struct { 318 uint32_t limit; 319 uint32_t seconds; 320 } pktrate; 321 int max_pkt_size; 322 } filter_opts; 323 324 static struct antispoof_opts { 325 char *label[PF_RULE_MAX_LABEL_COUNT]; 326 int labelcount; 327 u_int32_t ridentifier; 328 u_int rtableid; 329 } antispoof_opts; 330 331 static struct scrub_opts { 332 int marker; 333 int nodf; 334 int minttl; 335 int maxmss; 336 int settos; 337 int fragcache; 338 int randomid; 339 int reassemble_tcp; 340 char *match_tag; 341 u_int8_t match_tag_not; 342 u_int rtableid; 343 } scrub_opts; 344 345 static struct queue_opts { 346 int marker; 347 #define QOM_BWSPEC 0x01 348 #define QOM_SCHEDULER 0x02 349 #define QOM_PRIORITY 0x04 350 #define QOM_TBRSIZE 0x08 351 #define QOM_QLIMIT 0x10 352 struct node_queue_bw queue_bwspec; 353 struct node_queue_opt scheduler; 354 int priority; 355 unsigned int tbrsize; 356 int qlimit; 357 } queue_opts; 358 359 static struct table_opts { 360 int flags; 361 int init_addr; 362 struct node_tinithead init_nodes; 363 } table_opts; 364 365 static struct codel_opts codel_opts; 366 static struct node_hfsc_opts hfsc_opts; 367 static struct node_fairq_opts fairq_opts; 368 static struct node_state_opt *keep_state_defaults = NULL; 369 static struct pfctl_watermarks syncookie_opts; 370 371 int validate_range(uint8_t, uint16_t, uint16_t); 372 int disallow_table(struct node_host *, const char *); 373 int disallow_urpf_failed(struct node_host *, const char *); 374 int disallow_alias(struct node_host *, const char *); 375 int rule_consistent(struct pfctl_rule *, int); 376 int filter_consistent(struct pfctl_rule *, int); 377 int nat_consistent(struct pfctl_rule *); 378 int rdr_consistent(struct pfctl_rule *); 379 int process_tabledef(char *, struct table_opts *, int); 380 void expand_label_str(char *, size_t, const char *, const char *); 381 void expand_label_if(const char *, char *, size_t, const char *); 382 void expand_label_addr(const char *, char *, size_t, sa_family_t, 383 struct pf_rule_addr *); 384 void expand_label_port(const char *, char *, size_t, 385 struct pf_rule_addr *); 386 void expand_label_proto(const char *, char *, size_t, u_int8_t); 387 void expand_label_nr(const char *, char *, size_t, 388 struct pfctl_rule *); 389 void expand_eth_rule(struct pfctl_eth_rule *, 390 struct node_if *, struct node_etherproto *, 391 struct node_mac *, struct node_mac *, 392 struct node_host *, struct node_host *, const char *, 393 const char *); 394 int apply_rdr_ports(struct pfctl_rule *r, struct pfctl_pool *, struct redirspec *); 395 int apply_nat_ports(struct pfctl_pool *, struct redirspec *); 396 int apply_redirspec(struct pfctl_pool *, struct redirspec *); 397 int check_binat_redirspec(struct node_host *, struct pfctl_rule *, sa_family_t); 398 void add_binat_rdr_rule(struct pfctl_rule *, struct redirspec *, 399 struct node_host *, struct pfctl_rule *, struct redirspec **, 400 struct node_host **); 401 void expand_rule(struct pfctl_rule *, bool, struct node_if *, 402 struct redirspec *, struct redirspec *, struct redirspec *, 403 struct node_proto *, struct node_os *, struct node_host *, 404 struct node_port *, struct node_host *, struct node_port *, 405 struct node_uid *, struct node_gid *, struct node_if *, 406 struct node_icmp *, const char *); 407 int expand_altq(struct pf_altq *, struct node_if *, 408 struct node_queue *, struct node_queue_bw bwspec, 409 struct node_queue_opt *); 410 int expand_queue(struct pf_altq *, struct node_if *, 411 struct node_queue *, struct node_queue_bw, 412 struct node_queue_opt *); 413 int expand_skip_interface(struct node_if *); 414 415 int check_rulestate(int); 416 int getservice(char *); 417 int rule_label(struct pfctl_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]); 418 int eth_rule_label(struct pfctl_eth_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]); 419 int rt_tableid_max(void); 420 421 void mv_rules(struct pfctl_ruleset *, struct pfctl_ruleset *); 422 void mv_eth_rules(struct pfctl_eth_ruleset *, struct pfctl_eth_ruleset *); 423 void decide_address_family(struct node_host *, sa_family_t *); 424 void remove_invalid_hosts(struct node_host **, sa_family_t *); 425 int invalid_redirect(struct node_host *, sa_family_t); 426 u_int16_t parseicmpspec(char *, sa_family_t); 427 int kw_casecmp(const void *, const void *); 428 int map_tos(char *string, int *); 429 int filteropts_to_rule(struct pfctl_rule *, struct filter_opts *); 430 struct node_mac* node_mac_from_string(const char *); 431 struct node_mac* node_mac_from_string_masklen(const char *, int); 432 struct node_mac* node_mac_from_string_mask(const char *, const char *); 433 434 static TAILQ_HEAD(loadanchorshead, loadanchors) 435 loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead); 436 437 struct loadanchors { 438 TAILQ_ENTRY(loadanchors) entries; 439 char *anchorname; 440 char *filename; 441 }; 442 443 typedef struct { 444 union { 445 int64_t number; 446 double probability; 447 int i; 448 char *string; 449 u_int rtableid; 450 struct { 451 u_int8_t b1; 452 u_int8_t b2; 453 u_int16_t w; 454 u_int16_t w2; 455 } b; 456 struct range range; 457 struct node_if *interface; 458 struct node_proto *proto; 459 struct node_etherproto *etherproto; 460 struct node_icmp *icmp; 461 struct node_host *host; 462 struct node_os *os; 463 struct node_port *port; 464 struct node_uid *uid; 465 struct node_gid *gid; 466 struct node_state_opt *state_opt; 467 struct peer peer; 468 struct { 469 struct peer src, dst; 470 struct node_os *src_os; 471 } fromto; 472 struct { 473 struct node_mac *src; 474 struct node_mac *dst; 475 } etherfromto; 476 struct node_mac *mac; 477 struct { 478 struct node_mac *mac; 479 } etheraddr; 480 char *bridge_to; 481 struct { 482 struct redirspec *redirspec; 483 u_int8_t rt; 484 } route; 485 struct redirspec *redirspec; 486 struct { 487 int action; 488 struct node_state_opt *options; 489 } keep_state; 490 struct { 491 u_int8_t log; 492 u_int8_t logif; 493 u_int8_t quick; 494 } logquick; 495 struct { 496 int neg; 497 char *name; 498 } tagged; 499 struct pf_poolhashkey *hashkey; 500 struct node_queue *queue; 501 struct node_queue_opt queue_options; 502 struct node_queue_bw queue_bwspec; 503 struct node_qassign qassign; 504 struct filter_opts filter_opts; 505 struct antispoof_opts antispoof_opts; 506 struct queue_opts queue_opts; 507 struct scrub_opts scrub_opts; 508 struct table_opts table_opts; 509 struct pool_opts pool_opts; 510 struct node_hfsc_opts hfsc_opts; 511 struct node_fairq_opts fairq_opts; 512 struct codel_opts codel_opts; 513 struct pfctl_watermarks *watermarks; 514 } v; 515 int lineno; 516 } YYSTYPE; 517 518 #define PPORT_RANGE 1 519 #define PPORT_STAR 2 520 int parseport(char *, struct range *r, int); 521 522 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \ 523 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \ 524 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1]))) 525 526 %} 527 528 %token PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS 529 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 530 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 531 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 532 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 533 %token REASSEMBLE ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 534 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY 535 %token RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID 536 %token ANTISPOOF FOR INCLUDE KEEPCOUNTERS SYNCOOKIES L3 MATCHES 537 %token ETHER 538 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET 539 %token ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME 540 %token UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL 541 %token DNPIPE DNQUEUE RIDENTIFIER 542 %token LOAD RULESET_OPTIMIZATION PRIO 543 %token STICKYADDRESS ENDPI MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE 544 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY PFLOW ALLOW_RELATED 545 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS 546 %token DIVERTTO DIVERTREPLY BRIDGE_TO RECEIVEDON NE LE GE AFTO NATTO RDRTO 547 %token BINATTO MAXPKTRATE MAXPKTSIZE IPV6NH 548 %token <v.string> STRING 549 %token <v.number> NUMBER 550 %token <v.i> PORTBINARY 551 %type <v.interface> interface if_list if_item_not if_item 552 %type <v.number> number icmptype icmp6type uid gid 553 %type <v.number> tos not yesno optnodf 554 %type <v.probability> probability 555 %type <v.i> no dir af fragcache optimizer syncookie_val 556 %type <v.i> sourcetrack flush unaryop statelock 557 %type <v.i> etherprotoval 558 %type <v.b> action nataction natpasslog scrubaction 559 %type <v.b> flags flag blockspec prio 560 %type <v.range> portplain portstar portrange 561 %type <v.hashkey> hashkey 562 %type <v.proto> proto proto_list proto_item 563 %type <v.number> protoval 564 %type <v.icmp> icmpspec 565 %type <v.icmp> icmp_list icmp_item 566 %type <v.icmp> icmp6_list icmp6_item 567 %type <v.number> reticmpspec reticmp6spec 568 %type <v.fromto> fromto l3fromto 569 %type <v.peer> ipportspec from to 570 %type <v.host> ipspec toipspec xhost host dynaddr host_list 571 %type <v.host> redir_host redir_host_list routespec 572 %type <v.host> route_host route_host_list 573 %type <v.os> os xos os_list 574 %type <v.port> portspec port_list port_item 575 %type <v.uid> uids uid_list uid_item 576 %type <v.gid> gids gid_list gid_item 577 %type <v.route> route 578 %type <v.redirspec> no_port_redirspec port_redirspec route_redirspec 579 %type <v.redirspec> binat_redirspec nat_redirspec 580 %type <v.string> label stringall tag anchorname 581 %type <v.string> string varstring numberstring 582 %type <v.keep_state> keep 583 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item 584 %type <v.logquick> logquick quick log logopts logopt 585 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if 586 %type <v.qassign> qname etherqname 587 %type <v.queue> qassign qassign_list qassign_item 588 %type <v.queue_options> scheduler 589 %type <v.number> cbqflags_list cbqflags_item 590 %type <v.number> priqflags_list priqflags_item 591 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 592 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts 593 %type <v.codel_opts> codelopts_list codelopts_item codel_opts 594 %type <v.queue_bwspec> bandwidth 595 %type <v.filter_opts> filter_opts filter_opt filter_opts_l etherfilter_opts etherfilter_opt etherfilter_opts_l 596 %type <v.filter_opts> filter_sets filter_set filter_sets_l 597 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 598 %type <v.queue_opts> queue_opts queue_opt queue_opts_l 599 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 600 %type <v.table_opts> table_opts table_opt table_opts_l 601 %type <v.pool_opts> pool_opts pool_opt pool_opts_l 602 %type <v.tagged> tagged 603 %type <v.rtableid> rtable 604 %type <v.watermarks> syncookie_opts 605 %type <v.etherproto> etherproto etherproto_list etherproto_item 606 %type <v.etherfromto> etherfromto 607 %type <v.etheraddr> etherfrom etherto 608 %type <v.bridge_to> bridge 609 %type <v.mac> xmac mac mac_list macspec 610 %% 611 612 ruleset : /* empty */ 613 | ruleset include '\n' 614 | ruleset '\n' 615 | ruleset option '\n' 616 | ruleset etherrule '\n' 617 | ruleset etheranchorrule '\n' 618 | ruleset scrubrule '\n' 619 | ruleset natrule '\n' 620 | ruleset binatrule '\n' 621 | ruleset pfrule '\n' 622 | ruleset anchorrule '\n' 623 | ruleset loadrule '\n' 624 | ruleset altqif '\n' 625 | ruleset queuespec '\n' 626 | ruleset varset '\n' 627 | ruleset antispoof '\n' 628 | ruleset tabledef '\n' 629 | '{' fakeanchor '}' '\n'; 630 | ruleset error '\n' { file->errors++; } 631 ; 632 633 include : INCLUDE STRING { 634 struct file *nfile; 635 636 if ((nfile = pushfile($2, 0)) == NULL) { 637 yyerror("failed to include file %s", $2); 638 free($2); 639 YYERROR; 640 } 641 free($2); 642 643 file = nfile; 644 lungetc('\n'); 645 } 646 ; 647 648 /* 649 * apply to previouslys specified rule: must be careful to note 650 * what that is: pf or nat or binat or rdr 651 */ 652 fakeanchor : fakeanchor '\n' 653 | fakeanchor anchorrule '\n' 654 | fakeanchor binatrule '\n' 655 | fakeanchor natrule '\n' 656 | fakeanchor pfrule '\n' 657 | fakeanchor error '\n' 658 ; 659 660 optimizer : string { 661 if (!strcmp($1, "none")) 662 $$ = 0; 663 else if (!strcmp($1, "basic")) 664 $$ = PF_OPTIMIZE_BASIC; 665 else if (!strcmp($1, "profile")) 666 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE; 667 else { 668 yyerror("unknown ruleset-optimization %s", $1); 669 YYERROR; 670 } 671 } 672 ; 673 674 optnodf : /* empty */ { $$ = 0; } 675 | NODF { $$ = 1; } 676 ; 677 678 option : SET REASSEMBLE yesno optnodf { 679 if (check_rulestate(PFCTL_STATE_OPTION)) 680 YYERROR; 681 pfctl_set_reassembly(pf, $3, $4); 682 } 683 | SET OPTIMIZATION STRING { 684 if (check_rulestate(PFCTL_STATE_OPTION)) { 685 free($3); 686 YYERROR; 687 } 688 if (pfctl_set_optimization(pf, $3) != 0) { 689 yyerror("unknown optimization %s", $3); 690 free($3); 691 YYERROR; 692 } 693 free($3); 694 } 695 | SET RULESET_OPTIMIZATION optimizer { 696 if (!(pf->opts & PF_OPT_OPTIMIZE)) { 697 pf->opts |= PF_OPT_OPTIMIZE; 698 pf->optimize = $3; 699 } 700 } 701 | SET TIMEOUT timeout_spec 702 | SET TIMEOUT '{' optnl timeout_list '}' 703 | SET LIMIT limit_spec 704 | SET LIMIT '{' optnl limit_list '}' 705 | SET LOGINTERFACE stringall { 706 if (check_rulestate(PFCTL_STATE_OPTION)) { 707 free($3); 708 YYERROR; 709 } 710 if (pfctl_set_logif(pf, $3) != 0) { 711 yyerror("error setting loginterface %s", $3); 712 free($3); 713 YYERROR; 714 } 715 free($3); 716 } 717 | SET HOSTID number { 718 if ($3 == 0 || $3 > UINT_MAX) { 719 yyerror("hostid must be non-zero"); 720 YYERROR; 721 } 722 pfctl_set_hostid(pf, $3); 723 } 724 | SET BLOCKPOLICY DROP { 725 if (pf->opts & PF_OPT_VERBOSE) 726 printf("set block-policy drop\n"); 727 if (check_rulestate(PFCTL_STATE_OPTION)) 728 YYERROR; 729 blockpolicy = PFRULE_DROP; 730 } 731 | SET BLOCKPOLICY RETURN { 732 if (pf->opts & PF_OPT_VERBOSE) 733 printf("set block-policy return\n"); 734 if (check_rulestate(PFCTL_STATE_OPTION)) 735 YYERROR; 736 blockpolicy = PFRULE_RETURN; 737 } 738 | SET FAILPOLICY DROP { 739 if (pf->opts & PF_OPT_VERBOSE) 740 printf("set fail-policy drop\n"); 741 if (check_rulestate(PFCTL_STATE_OPTION)) 742 YYERROR; 743 failpolicy = PFRULE_DROP; 744 } 745 | SET FAILPOLICY RETURN { 746 if (pf->opts & PF_OPT_VERBOSE) 747 printf("set fail-policy return\n"); 748 if (check_rulestate(PFCTL_STATE_OPTION)) 749 YYERROR; 750 failpolicy = PFRULE_RETURN; 751 } 752 | SET REQUIREORDER yesno { 753 if (pf->opts & PF_OPT_VERBOSE) 754 printf("set require-order %s\n", 755 $3 == 1 ? "yes" : "no"); 756 require_order = $3; 757 } 758 | SET FINGERPRINTS STRING { 759 if (pf->opts & PF_OPT_VERBOSE) 760 printf("set fingerprints \"%s\"\n", $3); 761 if (check_rulestate(PFCTL_STATE_OPTION)) { 762 free($3); 763 YYERROR; 764 } 765 if (!pf->anchor->name[0]) { 766 if (pfctl_file_fingerprints(pf->dev, 767 pf->opts, $3)) { 768 yyerror("error loading " 769 "fingerprints %s", $3); 770 free($3); 771 YYERROR; 772 } 773 } 774 free($3); 775 } 776 | SET STATEPOLICY statelock { 777 if (pf->opts & PF_OPT_VERBOSE) 778 switch ($3) { 779 case 0: 780 printf("set state-policy floating\n"); 781 break; 782 case PFRULE_IFBOUND: 783 printf("set state-policy if-bound\n"); 784 break; 785 } 786 default_statelock = $3; 787 } 788 | SET DEBUG STRING { 789 if (check_rulestate(PFCTL_STATE_OPTION)) { 790 free($3); 791 YYERROR; 792 } 793 if (pfctl_do_set_debug(pf, $3) != 0) { 794 yyerror("error setting debuglevel %s", $3); 795 free($3); 796 YYERROR; 797 } 798 free($3); 799 } 800 | SET SKIP interface { 801 if (expand_skip_interface($3) != 0) { 802 yyerror("error setting skip interface(s)"); 803 YYERROR; 804 } 805 } 806 | SET STATEDEFAULTS state_opt_list { 807 if (keep_state_defaults != NULL) { 808 yyerror("cannot redefine state-defaults"); 809 YYERROR; 810 } 811 keep_state_defaults = $3; 812 } 813 | SET KEEPCOUNTERS { 814 pf->keep_counters = true; 815 } 816 | SET SYNCOOKIES syncookie_val syncookie_opts { 817 if (pfctl_cfg_syncookies(pf, $3, $4)) { 818 yyerror("error setting syncookies"); 819 YYERROR; 820 } 821 } 822 ; 823 824 syncookie_val : STRING { 825 if (!strcmp($1, "never")) 826 $$ = PFCTL_SYNCOOKIES_NEVER; 827 else if (!strcmp($1, "adaptive")) 828 $$ = PFCTL_SYNCOOKIES_ADAPTIVE; 829 else if (!strcmp($1, "always")) 830 $$ = PFCTL_SYNCOOKIES_ALWAYS; 831 else { 832 yyerror("illegal value for syncookies"); 833 YYERROR; 834 } 835 } 836 ; 837 syncookie_opts : /* empty */ { $$ = NULL; } 838 | { 839 memset(&syncookie_opts, 0, sizeof(syncookie_opts)); 840 } '(' syncookie_opt_l ')' { $$ = &syncookie_opts; } 841 ; 842 843 syncookie_opt_l : syncookie_opt_l comma syncookie_opt 844 | syncookie_opt 845 ; 846 847 syncookie_opt : STRING STRING { 848 double val; 849 char *cp; 850 851 val = strtod($2, &cp); 852 if (cp == NULL || strcmp(cp, "%")) 853 YYERROR; 854 if (val <= 0 || val > 100) { 855 yyerror("illegal percentage value"); 856 YYERROR; 857 } 858 if (!strcmp($1, "start")) { 859 syncookie_opts.hi = val; 860 } else if (!strcmp($1, "end")) { 861 syncookie_opts.lo = val; 862 } else { 863 yyerror("illegal syncookie option"); 864 YYERROR; 865 } 866 } 867 ; 868 869 stringall : STRING { $$ = $1; } 870 | ALL { 871 if (($$ = strdup("all")) == NULL) { 872 err(1, "stringall: strdup"); 873 } 874 } 875 ; 876 877 string : STRING string { 878 if (asprintf(&$$, "%s %s", $1, $2) == -1) 879 err(1, "string: asprintf"); 880 free($1); 881 free($2); 882 } 883 | STRING 884 ; 885 886 varstring : numberstring varstring { 887 if (asprintf(&$$, "%s %s", $1, $2) == -1) 888 err(1, "string: asprintf"); 889 free($1); 890 free($2); 891 } 892 | numberstring 893 ; 894 895 numberstring : NUMBER { 896 char *s; 897 if (asprintf(&s, "%lld", (long long)$1) == -1) { 898 yyerror("string: asprintf"); 899 YYERROR; 900 } 901 $$ = s; 902 } 903 | STRING 904 ; 905 906 varset : STRING '=' varstring { 907 char *s = $1; 908 if (pf->opts & PF_OPT_VERBOSE) 909 printf("%s = \"%s\"\n", $1, $3); 910 while (*s++) { 911 if (isspace((unsigned char)*s)) { 912 yyerror("macro name cannot contain " 913 "whitespace"); 914 free($1); 915 free($3); 916 YYERROR; 917 } 918 } 919 if (symset($1, $3, 0) == -1) 920 err(1, "cannot store variable %s", $1); 921 free($1); 922 free($3); 923 } 924 ; 925 926 anchorname : STRING { 927 if ($1[0] == '\0') { 928 free($1); 929 yyerror("anchor name must not be empty"); 930 YYERROR; 931 } 932 if (strlen(pf->anchor->path) + 1 + 933 strlen($1) >= PATH_MAX) { 934 free($1); 935 yyerror("anchor name is longer than %u", 936 PATH_MAX - 1); 937 YYERROR; 938 } 939 if ($1[0] == '_' || strstr($1, "/_") != NULL) { 940 free($1); 941 yyerror("anchor names beginning with '_' " 942 "are reserved for internal use"); 943 YYERROR; 944 } 945 $$ = $1; 946 } 947 | /* empty */ { $$ = NULL; } 948 ; 949 950 pfa_anchorlist : /* empty */ 951 | pfa_anchorlist '\n' 952 | pfa_anchorlist pfrule '\n' 953 | pfa_anchorlist anchorrule '\n' 954 | pfa_anchorlist include '\n' 955 ; 956 957 pfa_anchor : '{' 958 { 959 char ta[PF_ANCHOR_NAME_SIZE]; 960 struct pfctl_ruleset *rs; 961 962 /* stepping into a brace anchor */ 963 if (pf->asd >= PFCTL_ANCHOR_STACK_DEPTH) 964 errx(1, "pfa_anchor: anchors too deep"); 965 pf->asd++; 966 pf->bn++; 967 968 /* 969 * Anchor contents are parsed before the anchor rule 970 * production completes, so we don't know the real 971 * location yet. Create a holding ruleset in the root; 972 * contents will be moved afterwards. 973 */ 974 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 975 rs = pf_find_or_create_ruleset(ta); 976 if (rs == NULL) 977 err(1, "pfa_anchor: pf_find_or_create_ruleset"); 978 pf->astack[pf->asd] = rs->anchor; 979 pf->anchor = rs->anchor; 980 } '\n' pfa_anchorlist '}' 981 { 982 pf->alast = pf->anchor; 983 pf->asd--; 984 pf->anchor = pf->astack[pf->asd]; 985 } 986 | /* empty */ 987 ; 988 989 anchorrule : ANCHOR anchorname dir quick interface af proto fromto 990 filter_opts pfa_anchor 991 { 992 struct pfctl_rule r; 993 struct node_proto *proto; 994 995 if (check_rulestate(PFCTL_STATE_FILTER)) { 996 if ($2) 997 free($2); 998 YYERROR; 999 } 1000 1001 pfctl_init_rule(&r); 1002 1003 if (pf->astack[pf->asd + 1]) { 1004 if ($2 && strchr($2, '/') != NULL) { 1005 free($2); 1006 yyerror("anchor paths containing '/' " 1007 "cannot be used for inline anchors."); 1008 YYERROR; 1009 } 1010 1011 /* Move inline rules into relative location. */ 1012 pfctl_anchor_setup(&r, 1013 &pf->astack[pf->asd]->ruleset, 1014 $2 ? $2 : pf->alast->name); 1015 1016 if (r.anchor == NULL) 1017 err(1, "anchorrule: unable to " 1018 "create ruleset"); 1019 1020 if (pf->alast != r.anchor) { 1021 if (r.anchor->match) { 1022 yyerror("inline anchor '%s' " 1023 "already exists", 1024 r.anchor->name); 1025 YYERROR; 1026 } 1027 mv_rules(&pf->alast->ruleset, 1028 &r.anchor->ruleset); 1029 } 1030 pf_remove_if_empty_ruleset(&pf->alast->ruleset); 1031 pf->alast = r.anchor; 1032 } else { 1033 if (!$2) { 1034 yyerror("anchors without explicit " 1035 "rules must specify a name"); 1036 YYERROR; 1037 } 1038 } 1039 r.direction = $3; 1040 r.quick = $4.quick; 1041 r.af = $6; 1042 1043 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 1044 for (proto = $7; proto != NULL && 1045 proto->proto != IPPROTO_TCP; 1046 proto = proto->next) 1047 ; /* nothing */ 1048 if (proto == NULL && $7 != NULL) { 1049 if ($9.flags.b1 || $9.flags.b2) 1050 yyerror( 1051 "flags only apply to tcp"); 1052 if ($8.src_os) 1053 yyerror( 1054 "OS fingerprinting only " 1055 "applies to tcp"); 1056 YYERROR; 1057 } 1058 } 1059 1060 if (filteropts_to_rule(&r, &$9)) 1061 YYERROR; 1062 1063 if ($9.keep.action) { 1064 yyerror("cannot specify state handling " 1065 "on anchors"); 1066 YYERROR; 1067 } 1068 1069 decide_address_family($8.src.host, &r.af); 1070 decide_address_family($8.dst.host, &r.af); 1071 1072 expand_rule(&r, false, $5, NULL, NULL, NULL, 1073 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host, 1074 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec, 1075 pf->astack[pf->asd + 1] ? pf->alast->name : $2); 1076 free($2); 1077 pf->astack[pf->asd + 1] = NULL; 1078 } 1079 | NATANCHOR string interface af proto fromto rtable { 1080 struct pfctl_rule r; 1081 1082 if (check_rulestate(PFCTL_STATE_NAT)) { 1083 free($2); 1084 YYERROR; 1085 } 1086 1087 pfctl_init_rule(&r); 1088 1089 r.action = PF_NAT; 1090 r.af = $4; 1091 r.rtableid = $7; 1092 1093 decide_address_family($6.src.host, &r.af); 1094 decide_address_family($6.dst.host, &r.af); 1095 1096 expand_rule(&r, false, $3, NULL, NULL, NULL, 1097 $5, $6.src_os, $6.src.host, $6.src.port, $6.dst.host, 1098 $6.dst.port, 0, 0, 0, 0, $2); 1099 free($2); 1100 } 1101 | RDRANCHOR string interface af proto fromto rtable { 1102 struct pfctl_rule r; 1103 1104 if (check_rulestate(PFCTL_STATE_NAT)) { 1105 free($2); 1106 YYERROR; 1107 } 1108 1109 pfctl_init_rule(&r); 1110 1111 r.action = PF_RDR; 1112 r.af = $4; 1113 r.rtableid = $7; 1114 1115 decide_address_family($6.src.host, &r.af); 1116 decide_address_family($6.dst.host, &r.af); 1117 1118 if ($6.src.port != NULL) { 1119 yyerror("source port parameter not supported" 1120 " in rdr-anchor"); 1121 YYERROR; 1122 } 1123 if ($6.dst.port != NULL) { 1124 if ($6.dst.port->next != NULL) { 1125 yyerror("destination port list " 1126 "expansion not supported in " 1127 "rdr-anchor"); 1128 YYERROR; 1129 } else if ($6.dst.port->op != PF_OP_EQ) { 1130 yyerror("destination port operators" 1131 " not supported in rdr-anchor"); 1132 YYERROR; 1133 } 1134 r.dst.port[0] = $6.dst.port->port[0]; 1135 r.dst.port[1] = $6.dst.port->port[1]; 1136 r.dst.port_op = $6.dst.port->op; 1137 } 1138 1139 expand_rule(&r, false, $3, NULL, NULL, NULL, 1140 $5, $6.src_os, $6.src.host, $6.src.port, $6.dst.host, 1141 $6.dst.port, 0, 0, 0, 0, $2); 1142 free($2); 1143 } 1144 | BINATANCHOR string interface af proto fromto rtable { 1145 struct pfctl_rule r; 1146 1147 if (check_rulestate(PFCTL_STATE_NAT)) { 1148 free($2); 1149 YYERROR; 1150 } 1151 1152 pfctl_init_rule(&r); 1153 1154 r.action = PF_BINAT; 1155 r.af = $4; 1156 r.rtableid = $7; 1157 if ($5 != NULL) { 1158 if ($5->next != NULL) { 1159 yyerror("proto list expansion" 1160 " not supported in binat-anchor"); 1161 YYERROR; 1162 } 1163 r.proto = $5->proto; 1164 free($5); 1165 } 1166 1167 if ($6.src.host != NULL || $6.src.port != NULL || 1168 $6.dst.host != NULL || $6.dst.port != NULL) { 1169 yyerror("fromto parameter not supported" 1170 " in binat-anchor"); 1171 YYERROR; 1172 } 1173 1174 decide_address_family($6.src.host, &r.af); 1175 decide_address_family($6.dst.host, &r.af); 1176 1177 pfctl_append_rule(pf, &r, $2); 1178 free($2); 1179 } 1180 ; 1181 1182 loadrule : LOAD ANCHOR anchorname FROM string { 1183 struct loadanchors *loadanchor; 1184 1185 if ($3 == NULL) { 1186 yyerror("anchor name is missing"); 1187 YYERROR; 1188 } 1189 loadanchor = calloc(1, sizeof(struct loadanchors)); 1190 if (loadanchor == NULL) 1191 err(1, "loadrule: calloc"); 1192 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) == 1193 NULL) 1194 err(1, "loadrule: malloc"); 1195 if (pf->anchor->name[0]) 1196 snprintf(loadanchor->anchorname, MAXPATHLEN, 1197 "%s/%s", pf->anchor->path, $3); 1198 else 1199 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN); 1200 if ((loadanchor->filename = strdup($5)) == NULL) 1201 err(1, "loadrule: strdup"); 1202 1203 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 1204 entries); 1205 1206 free($3); 1207 free($5); 1208 }; 1209 1210 scrubaction : no SCRUB { 1211 $$.b2 = $$.w = 0; 1212 if ($1) 1213 $$.b1 = PF_NOSCRUB; 1214 else 1215 $$.b1 = PF_SCRUB; 1216 } 1217 ; 1218 1219 etherrule : ETHER action dir quick interface bridge etherproto etherfromto l3fromto etherfilter_opts 1220 { 1221 struct pfctl_eth_rule r; 1222 1223 bzero(&r, sizeof(r)); 1224 1225 if (check_rulestate(PFCTL_STATE_ETHER)) 1226 YYERROR; 1227 1228 r.action = $2.b1; 1229 r.direction = $3; 1230 r.quick = $4.quick; 1231 if ($10.tag != NULL) 1232 strlcpy(r.tagname, $10.tag, sizeof(r.tagname)); 1233 if ($10.match_tag) 1234 if (strlcpy(r.match_tagname, $10.match_tag, 1235 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1236 yyerror("tag too long, max %u chars", 1237 PF_TAG_NAME_SIZE - 1); 1238 YYERROR; 1239 } 1240 r.match_tag_not = $10.match_tag_not; 1241 if ($10.queues.qname != NULL) 1242 strlcpy(r.qname, $10.queues.qname, sizeof(r.qname)); 1243 r.dnpipe = $10.dnpipe; 1244 r.dnflags = $10.free_flags; 1245 if (eth_rule_label(&r, $10.label)) 1246 YYERROR; 1247 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1248 free($10.label[i]); 1249 r.ridentifier = $10.ridentifier; 1250 1251 expand_eth_rule(&r, $5, $7, $8.src, $8.dst, 1252 $9.src.host, $9.dst.host, $6, ""); 1253 } 1254 ; 1255 1256 etherpfa_anchorlist : /* empty */ 1257 | etherpfa_anchorlist '\n' 1258 | etherpfa_anchorlist etherrule '\n' 1259 | etherpfa_anchorlist etheranchorrule '\n' 1260 ; 1261 1262 etherpfa_anchor : '{' 1263 { 1264 char ta[PF_ANCHOR_NAME_SIZE]; 1265 struct pfctl_eth_ruleset *rs; 1266 1267 /* steping into a brace anchor */ 1268 if (pf->asd >= PFCTL_ANCHOR_STACK_DEPTH) 1269 errx(1, "pfa_anchor: anchors too deep"); 1270 pf->asd++; 1271 pf->bn++; 1272 1273 /* create a holding ruleset in the root */ 1274 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn); 1275 rs = pf_find_or_create_eth_ruleset(ta); 1276 if (rs == NULL) 1277 err(1, "etherpfa_anchor: pf_find_or_create_eth_ruleset"); 1278 pf->eastack[pf->asd] = rs->anchor; 1279 pf->eanchor = rs->anchor; 1280 } '\n' etherpfa_anchorlist '}' 1281 { 1282 pf->ealast = pf->eanchor; 1283 pf->asd--; 1284 pf->eanchor = pf->eastack[pf->asd]; 1285 } 1286 | /* empty */ 1287 ; 1288 1289 etheranchorrule : ETHER ANCHOR anchorname dir quick interface etherproto etherfromto l3fromto etherpfa_anchor 1290 { 1291 struct pfctl_eth_rule r; 1292 1293 if (check_rulestate(PFCTL_STATE_ETHER)) { 1294 free($3); 1295 YYERROR; 1296 } 1297 1298 if ($3 && ($3[0] == '_' || strstr($3, "/_") != NULL)) { 1299 free($3); 1300 yyerror("anchor names beginning with '_' " 1301 "are reserved for internal use"); 1302 YYERROR; 1303 } 1304 1305 memset(&r, 0, sizeof(r)); 1306 if (pf->eastack[pf->asd + 1]) { 1307 if ($3 && strchr($3, '/') != NULL) { 1308 free($3); 1309 yyerror("anchor paths containing '/' " 1310 "cannot be used for inline anchors."); 1311 YYERROR; 1312 } 1313 1314 /* Move inline rules into relative location. */ 1315 pfctl_eth_anchor_setup(pf, &r, 1316 &pf->eastack[pf->asd]->ruleset, 1317 $3 ? $3 : pf->ealast->name); 1318 if (r.anchor == NULL) 1319 err(1, "etheranchorrule: unable to " 1320 "create ruleset"); 1321 1322 if (pf->ealast != r.anchor) { 1323 if (r.anchor->match) { 1324 yyerror("inline anchor '%s' " 1325 "already exists", 1326 r.anchor->name); 1327 YYERROR; 1328 } 1329 mv_eth_rules(&pf->ealast->ruleset, 1330 &r.anchor->ruleset); 1331 } 1332 pf_remove_if_empty_eth_ruleset(&pf->ealast->ruleset); 1333 pf->ealast = r.anchor; 1334 } else { 1335 if (!$3) { 1336 yyerror("anchors without explicit " 1337 "rules must specify a name"); 1338 YYERROR; 1339 } 1340 } 1341 1342 r.direction = $4; 1343 r.quick = $5.quick; 1344 1345 expand_eth_rule(&r, $6, $7, $8.src, $8.dst, 1346 $9.src.host, $9.dst.host, NULL, 1347 pf->eastack[pf->asd + 1] ? pf->ealast->name : $3); 1348 1349 free($3); 1350 pf->eastack[pf->asd + 1] = NULL; 1351 } 1352 ; 1353 1354 etherfilter_opts : { 1355 bzero(&filter_opts, sizeof filter_opts); 1356 } 1357 etherfilter_opts_l 1358 { $$ = filter_opts; } 1359 | /* empty */ { 1360 bzero(&filter_opts, sizeof filter_opts); 1361 $$ = filter_opts; 1362 } 1363 ; 1364 1365 etherfilter_opts_l : etherfilter_opts_l etherfilter_opt 1366 | etherfilter_opt 1367 1368 etherfilter_opt : etherqname { 1369 if (filter_opts.queues.qname) { 1370 yyerror("queue cannot be redefined"); 1371 YYERROR; 1372 } 1373 filter_opts.queues = $1; 1374 } 1375 | RIDENTIFIER number { 1376 filter_opts.ridentifier = $2; 1377 } 1378 | label { 1379 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 1380 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 1381 YYERROR; 1382 } 1383 filter_opts.label[filter_opts.labelcount++] = $1; 1384 } 1385 | TAG string { 1386 filter_opts.tag = $2; 1387 } 1388 | not TAGGED string { 1389 filter_opts.match_tag = $3; 1390 filter_opts.match_tag_not = $1; 1391 } 1392 | DNPIPE number { 1393 filter_opts.dnpipe = $2; 1394 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 1395 } 1396 | DNQUEUE number { 1397 filter_opts.dnpipe = $2; 1398 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 1399 } 1400 ; 1401 1402 bridge : /* empty */ { 1403 $$ = NULL; 1404 } 1405 | BRIDGE_TO STRING { 1406 $$ = strdup($2); 1407 } 1408 ; 1409 1410 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts 1411 { 1412 struct pfctl_rule r; 1413 1414 if (check_rulestate(PFCTL_STATE_SCRUB)) 1415 YYERROR; 1416 1417 pfctl_init_rule(&r); 1418 1419 r.action = $1.b1; 1420 r.direction = $2; 1421 1422 r.log = $3.log; 1423 r.logif = $3.logif; 1424 if ($3.quick) { 1425 yyerror("scrub rules do not support 'quick'"); 1426 YYERROR; 1427 } 1428 1429 r.af = $5; 1430 if ($8.nodf) 1431 r.rule_flag |= PFRULE_NODF; 1432 if ($8.randomid) 1433 r.rule_flag |= PFRULE_RANDOMID; 1434 if ($8.reassemble_tcp) { 1435 if (r.direction != PF_INOUT) { 1436 yyerror("reassemble tcp rules can not " 1437 "specify direction"); 1438 YYERROR; 1439 } 1440 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 1441 } 1442 if ($8.minttl) 1443 r.min_ttl = $8.minttl; 1444 if ($8.maxmss) 1445 r.max_mss = $8.maxmss; 1446 if ($8.marker & FOM_SETTOS) { 1447 r.rule_flag |= PFRULE_SET_TOS; 1448 r.set_tos = $8.settos; 1449 } 1450 if ($8.fragcache) 1451 r.rule_flag |= $8.fragcache; 1452 if ($8.match_tag) 1453 if (strlcpy(r.match_tagname, $8.match_tag, 1454 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 1455 yyerror("tag too long, max %u chars", 1456 PF_TAG_NAME_SIZE - 1); 1457 YYERROR; 1458 } 1459 r.match_tag_not = $8.match_tag_not; 1460 r.rtableid = $8.rtableid; 1461 1462 expand_rule(&r, false, $4, NULL, NULL, NULL, 1463 $6, $7.src_os, $7.src.host, $7.src.port, $7.dst.host, 1464 $7.dst.port, NULL, NULL, NULL, NULL, ""); 1465 } 1466 ; 1467 1468 scrub_opts : { 1469 bzero(&scrub_opts, sizeof scrub_opts); 1470 scrub_opts.rtableid = -1; 1471 } 1472 scrub_opts_l 1473 { $$ = scrub_opts; } 1474 | /* empty */ { 1475 bzero(&scrub_opts, sizeof scrub_opts); 1476 scrub_opts.rtableid = -1; 1477 $$ = scrub_opts; 1478 } 1479 ; 1480 1481 scrub_opts_l : scrub_opts_l comma scrub_opt 1482 | scrub_opt 1483 ; 1484 1485 scrub_opt : NODF { 1486 if (scrub_opts.nodf) { 1487 yyerror("no-df cannot be respecified"); 1488 YYERROR; 1489 } 1490 scrub_opts.nodf = 1; 1491 } 1492 | MINTTL NUMBER { 1493 if (scrub_opts.marker & FOM_MINTTL) { 1494 yyerror("min-ttl cannot be respecified"); 1495 YYERROR; 1496 } 1497 if ($2 < 0 || $2 > 255) { 1498 yyerror("illegal min-ttl value %d", $2); 1499 YYERROR; 1500 } 1501 scrub_opts.marker |= FOM_MINTTL; 1502 scrub_opts.minttl = $2; 1503 } 1504 | MAXMSS NUMBER { 1505 if (scrub_opts.marker & FOM_MAXMSS) { 1506 yyerror("max-mss cannot be respecified"); 1507 YYERROR; 1508 } 1509 if ($2 < 0 || $2 > 65535) { 1510 yyerror("illegal max-mss value %d", $2); 1511 YYERROR; 1512 } 1513 scrub_opts.marker |= FOM_MAXMSS; 1514 scrub_opts.maxmss = $2; 1515 } 1516 | SETTOS tos { 1517 if (scrub_opts.marker & FOM_SETTOS) { 1518 yyerror("set-tos cannot be respecified"); 1519 YYERROR; 1520 } 1521 scrub_opts.marker |= FOM_SETTOS; 1522 scrub_opts.settos = $2; 1523 } 1524 | fragcache { 1525 if (scrub_opts.marker & FOM_FRAGCACHE) { 1526 yyerror("fragcache cannot be respecified"); 1527 YYERROR; 1528 } 1529 scrub_opts.marker |= FOM_FRAGCACHE; 1530 scrub_opts.fragcache = $1; 1531 } 1532 | REASSEMBLE STRING { 1533 if (strcasecmp($2, "tcp") != 0) { 1534 yyerror("scrub reassemble supports only tcp, " 1535 "not '%s'", $2); 1536 free($2); 1537 YYERROR; 1538 } 1539 free($2); 1540 if (scrub_opts.reassemble_tcp) { 1541 yyerror("reassemble tcp cannot be respecified"); 1542 YYERROR; 1543 } 1544 scrub_opts.reassemble_tcp = 1; 1545 } 1546 | RANDOMID { 1547 if (scrub_opts.randomid) { 1548 yyerror("random-id cannot be respecified"); 1549 YYERROR; 1550 } 1551 scrub_opts.randomid = 1; 1552 } 1553 | RTABLE NUMBER { 1554 if ($2 < 0 || $2 > rt_tableid_max()) { 1555 yyerror("invalid rtable id"); 1556 YYERROR; 1557 } 1558 scrub_opts.rtableid = $2; 1559 } 1560 | not TAGGED string { 1561 scrub_opts.match_tag = $3; 1562 scrub_opts.match_tag_not = $1; 1563 } 1564 ; 1565 1566 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 1567 | FRAGMENT NO REASSEMBLE { $$ = PFRULE_FRAGMENT_NOREASS; } 1568 ; 1569 1570 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 1571 struct pfctl_rule r; 1572 struct node_host *h = NULL, *hh; 1573 struct node_if *i, *j; 1574 1575 if (check_rulestate(PFCTL_STATE_FILTER)) 1576 YYERROR; 1577 1578 for (i = $3; i; i = i->next) { 1579 pfctl_init_rule(&r); 1580 1581 r.action = PF_DROP; 1582 r.direction = PF_IN; 1583 r.log = $2.log; 1584 r.logif = $2.logif; 1585 r.quick = $2.quick; 1586 r.af = $4; 1587 r.ridentifier = $5.ridentifier; 1588 if (rule_label(&r, $5.label)) 1589 YYERROR; 1590 r.rtableid = $5.rtableid; 1591 j = calloc(1, sizeof(struct node_if)); 1592 if (j == NULL) 1593 err(1, "antispoof: calloc"); 1594 if (strlcpy(j->ifname, i->ifname, 1595 sizeof(j->ifname)) >= sizeof(j->ifname)) { 1596 free(j); 1597 yyerror("interface name too long"); 1598 YYERROR; 1599 } 1600 j->not = 1; 1601 if (i->dynamic) { 1602 h = calloc(1, sizeof(*h)); 1603 if (h == NULL) 1604 err(1, "address: calloc"); 1605 h->addr.type = PF_ADDR_DYNIFTL; 1606 set_ipmask(h, 128); 1607 if (strlcpy(h->addr.v.ifname, i->ifname, 1608 sizeof(h->addr.v.ifname)) >= 1609 sizeof(h->addr.v.ifname)) { 1610 free(h); 1611 yyerror( 1612 "interface name too long"); 1613 YYERROR; 1614 } 1615 hh = malloc(sizeof(*hh)); 1616 if (hh == NULL) 1617 err(1, "address: malloc"); 1618 bcopy(h, hh, sizeof(*hh)); 1619 h->addr.iflags = PFI_AFLAG_NETWORK; 1620 } else { 1621 h = ifa_lookup(j->ifname, 1622 PFI_AFLAG_NETWORK); 1623 hh = NULL; 1624 } 1625 1626 if (h != NULL) 1627 expand_rule(&r, false, j, NULL, NULL, 1628 NULL, NULL, NULL, h, NULL, NULL, 1629 NULL, NULL, NULL, NULL, NULL, ""); 1630 1631 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 1632 bzero(&r, sizeof(r)); 1633 1634 r.action = PF_DROP; 1635 r.direction = PF_IN; 1636 r.log = $2.log; 1637 r.logif = $2.logif; 1638 r.quick = $2.quick; 1639 r.af = $4; 1640 r.ridentifier = $5.ridentifier; 1641 if (rule_label(&r, $5.label)) 1642 YYERROR; 1643 r.rtableid = $5.rtableid; 1644 if (hh != NULL) 1645 h = hh; 1646 else 1647 h = ifa_lookup(i->ifname, 0); 1648 if (h != NULL) 1649 expand_rule(&r, false, NULL, 1650 NULL, NULL, NULL, NULL, 1651 NULL, h, NULL, NULL, NULL, 1652 NULL, NULL, NULL, NULL, ""); 1653 } else 1654 free(hh); 1655 } 1656 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 1657 free($5.label[i]); 1658 } 1659 ; 1660 1661 antispoof_ifspc : FOR antispoof_if { $$ = $2; } 1662 | FOR '{' optnl antispoof_iflst '}' { $$ = $4; } 1663 ; 1664 1665 antispoof_iflst : antispoof_if optnl { $$ = $1; } 1666 | antispoof_iflst comma antispoof_if optnl { 1667 $1->tail->next = $3; 1668 $1->tail = $3; 1669 $$ = $1; 1670 } 1671 ; 1672 1673 antispoof_if : if_item { $$ = $1; } 1674 | '(' if_item ')' { 1675 $2->dynamic = 1; 1676 $$ = $2; 1677 } 1678 ; 1679 1680 antispoof_opts : { 1681 bzero(&antispoof_opts, sizeof antispoof_opts); 1682 antispoof_opts.rtableid = -1; 1683 } 1684 antispoof_opts_l 1685 { $$ = antispoof_opts; } 1686 | /* empty */ { 1687 bzero(&antispoof_opts, sizeof antispoof_opts); 1688 antispoof_opts.rtableid = -1; 1689 $$ = antispoof_opts; 1690 } 1691 ; 1692 1693 antispoof_opts_l : antispoof_opts_l antispoof_opt 1694 | antispoof_opt 1695 ; 1696 1697 antispoof_opt : label { 1698 if (antispoof_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 1699 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 1700 YYERROR; 1701 } 1702 antispoof_opts.label[antispoof_opts.labelcount++] = $1; 1703 } 1704 | RIDENTIFIER number { 1705 antispoof_opts.ridentifier = $2; 1706 } 1707 | RTABLE NUMBER { 1708 if ($2 < 0 || $2 > rt_tableid_max()) { 1709 yyerror("invalid rtable id"); 1710 YYERROR; 1711 } 1712 antispoof_opts.rtableid = $2; 1713 } 1714 ; 1715 1716 not : '!' { $$ = 1; } 1717 | /* empty */ { $$ = 0; } 1718 ; 1719 1720 tabledef : TABLE '<' STRING '>' table_opts { 1721 struct node_host *h, *nh; 1722 struct node_tinit *ti, *nti; 1723 1724 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 1725 yyerror("table name too long, max %d chars", 1726 PF_TABLE_NAME_SIZE - 1); 1727 free($3); 1728 YYERROR; 1729 } 1730 if (pf->loadopt & PFCTL_FLAG_TABLE) 1731 if (process_tabledef($3, &$5, pf->opts)) { 1732 free($3); 1733 YYERROR; 1734 } 1735 free($3); 1736 for (ti = SIMPLEQ_FIRST(&$5.init_nodes); 1737 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) { 1738 if (ti->file) 1739 free(ti->file); 1740 for (h = ti->host; h != NULL; h = nh) { 1741 nh = h->next; 1742 free(h); 1743 } 1744 nti = SIMPLEQ_NEXT(ti, entries); 1745 free(ti); 1746 } 1747 } 1748 ; 1749 1750 table_opts : { 1751 bzero(&table_opts, sizeof table_opts); 1752 SIMPLEQ_INIT(&table_opts.init_nodes); 1753 } 1754 table_opts_l 1755 { $$ = table_opts; } 1756 | /* empty */ 1757 { 1758 bzero(&table_opts, sizeof table_opts); 1759 SIMPLEQ_INIT(&table_opts.init_nodes); 1760 $$ = table_opts; 1761 } 1762 ; 1763 1764 table_opts_l : table_opts_l table_opt 1765 | table_opt 1766 ; 1767 1768 table_opt : STRING { 1769 if (!strcmp($1, "const")) 1770 table_opts.flags |= PFR_TFLAG_CONST; 1771 else if (!strcmp($1, "persist")) 1772 table_opts.flags |= PFR_TFLAG_PERSIST; 1773 else if (!strcmp($1, "counters")) 1774 table_opts.flags |= PFR_TFLAG_COUNTERS; 1775 else { 1776 yyerror("invalid table option '%s'", $1); 1777 free($1); 1778 YYERROR; 1779 } 1780 free($1); 1781 } 1782 | '{' optnl '}' { table_opts.init_addr = 1; } 1783 | '{' optnl host_list '}' { 1784 struct node_host *n; 1785 struct node_tinit *ti; 1786 1787 for (n = $3; n != NULL; n = n->next) { 1788 switch (n->addr.type) { 1789 case PF_ADDR_ADDRMASK: 1790 continue; /* ok */ 1791 case PF_ADDR_RANGE: 1792 yyerror("address ranges are not " 1793 "permitted inside tables"); 1794 break; 1795 case PF_ADDR_DYNIFTL: 1796 yyerror("dynamic addresses are not " 1797 "permitted inside tables"); 1798 break; 1799 case PF_ADDR_TABLE: 1800 yyerror("tables cannot contain tables"); 1801 break; 1802 case PF_ADDR_NOROUTE: 1803 yyerror("\"no-route\" is not permitted " 1804 "inside tables"); 1805 break; 1806 case PF_ADDR_URPFFAILED: 1807 yyerror("\"urpf-failed\" is not " 1808 "permitted inside tables"); 1809 break; 1810 default: 1811 yyerror("unknown address type %d", 1812 n->addr.type); 1813 } 1814 YYERROR; 1815 } 1816 if (!(ti = calloc(1, sizeof(*ti)))) 1817 err(1, "table_opt: calloc"); 1818 ti->host = $3; 1819 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1820 entries); 1821 table_opts.init_addr = 1; 1822 } 1823 | FILENAME STRING { 1824 struct node_tinit *ti; 1825 1826 if (!(ti = calloc(1, sizeof(*ti)))) 1827 err(1, "table_opt: calloc"); 1828 ti->file = $2; 1829 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 1830 entries); 1831 table_opts.init_addr = 1; 1832 } 1833 ; 1834 1835 altqif : ALTQ interface queue_opts QUEUE qassign { 1836 struct pf_altq a; 1837 1838 if (check_rulestate(PFCTL_STATE_QUEUE)) 1839 YYERROR; 1840 1841 memset(&a, 0, sizeof(a)); 1842 if ($3.scheduler.qtype == ALTQT_NONE) { 1843 yyerror("no scheduler specified!"); 1844 YYERROR; 1845 } 1846 a.scheduler = $3.scheduler.qtype; 1847 a.qlimit = $3.qlimit; 1848 a.tbrsize = $3.tbrsize; 1849 if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) { 1850 yyerror("no child queues specified"); 1851 YYERROR; 1852 } 1853 if (expand_altq(&a, $2, $5, $3.queue_bwspec, 1854 &$3.scheduler)) 1855 YYERROR; 1856 } 1857 ; 1858 1859 queuespec : QUEUE STRING interface queue_opts qassign { 1860 struct pf_altq a; 1861 1862 if (check_rulestate(PFCTL_STATE_QUEUE)) { 1863 free($2); 1864 YYERROR; 1865 } 1866 1867 memset(&a, 0, sizeof(a)); 1868 1869 if (strlcpy(a.qname, $2, sizeof(a.qname)) >= 1870 sizeof(a.qname)) { 1871 yyerror("queue name too long (max " 1872 "%d chars)", PF_QNAME_SIZE-1); 1873 free($2); 1874 YYERROR; 1875 } 1876 free($2); 1877 if ($4.tbrsize) { 1878 yyerror("cannot specify tbrsize for queue"); 1879 YYERROR; 1880 } 1881 if ($4.priority > 255) { 1882 yyerror("priority out of range: max 255"); 1883 YYERROR; 1884 } 1885 a.priority = $4.priority; 1886 a.qlimit = $4.qlimit; 1887 a.scheduler = $4.scheduler.qtype; 1888 if (expand_queue(&a, $3, $5, $4.queue_bwspec, 1889 &$4.scheduler)) { 1890 yyerror("errors in queue definition"); 1891 YYERROR; 1892 } 1893 } 1894 ; 1895 1896 queue_opts : { 1897 bzero(&queue_opts, sizeof queue_opts); 1898 queue_opts.priority = DEFAULT_PRIORITY; 1899 queue_opts.qlimit = DEFAULT_QLIMIT; 1900 queue_opts.scheduler.qtype = ALTQT_NONE; 1901 queue_opts.queue_bwspec.bw_percent = 100; 1902 } 1903 queue_opts_l 1904 { $$ = queue_opts; } 1905 | /* empty */ { 1906 bzero(&queue_opts, sizeof queue_opts); 1907 queue_opts.priority = DEFAULT_PRIORITY; 1908 queue_opts.qlimit = DEFAULT_QLIMIT; 1909 queue_opts.scheduler.qtype = ALTQT_NONE; 1910 queue_opts.queue_bwspec.bw_percent = 100; 1911 $$ = queue_opts; 1912 } 1913 ; 1914 1915 queue_opts_l : queue_opts_l queue_opt 1916 | queue_opt 1917 ; 1918 1919 queue_opt : BANDWIDTH bandwidth { 1920 if (queue_opts.marker & QOM_BWSPEC) { 1921 yyerror("bandwidth cannot be respecified"); 1922 YYERROR; 1923 } 1924 queue_opts.marker |= QOM_BWSPEC; 1925 queue_opts.queue_bwspec = $2; 1926 } 1927 | PRIORITY NUMBER { 1928 if (queue_opts.marker & QOM_PRIORITY) { 1929 yyerror("priority cannot be respecified"); 1930 YYERROR; 1931 } 1932 if ($2 < 0 || $2 > 255) { 1933 yyerror("priority out of range: max 255"); 1934 YYERROR; 1935 } 1936 queue_opts.marker |= QOM_PRIORITY; 1937 queue_opts.priority = $2; 1938 } 1939 | QLIMIT NUMBER { 1940 if (queue_opts.marker & QOM_QLIMIT) { 1941 yyerror("qlimit cannot be respecified"); 1942 YYERROR; 1943 } 1944 if ($2 < 0 || $2 > 65535) { 1945 yyerror("qlimit out of range: max 65535"); 1946 YYERROR; 1947 } 1948 queue_opts.marker |= QOM_QLIMIT; 1949 queue_opts.qlimit = $2; 1950 } 1951 | scheduler { 1952 if (queue_opts.marker & QOM_SCHEDULER) { 1953 yyerror("scheduler cannot be respecified"); 1954 YYERROR; 1955 } 1956 queue_opts.marker |= QOM_SCHEDULER; 1957 queue_opts.scheduler = $1; 1958 } 1959 | TBRSIZE NUMBER { 1960 if (queue_opts.marker & QOM_TBRSIZE) { 1961 yyerror("tbrsize cannot be respecified"); 1962 YYERROR; 1963 } 1964 if ($2 < 0 || $2 > UINT_MAX) { 1965 yyerror("tbrsize too big: max %u", UINT_MAX); 1966 YYERROR; 1967 } 1968 queue_opts.marker |= QOM_TBRSIZE; 1969 queue_opts.tbrsize = $2; 1970 } 1971 ; 1972 1973 bandwidth : STRING { 1974 double bps; 1975 char *cp; 1976 1977 $$.bw_percent = 0; 1978 1979 bps = strtod($1, &cp); 1980 if (cp != NULL) { 1981 if (strlen(cp) > 1) { 1982 char *cu = cp + 1; 1983 if (!strcmp(cu, "Bit") || 1984 !strcmp(cu, "B") || 1985 !strcmp(cu, "bit") || 1986 !strcmp(cu, "b")) { 1987 *cu = 0; 1988 } 1989 } 1990 if (!strcmp(cp, "b")) 1991 ; /* nothing */ 1992 else if (!strcmp(cp, "K")) 1993 bps *= 1000; 1994 else if (!strcmp(cp, "M")) 1995 bps *= 1000 * 1000; 1996 else if (!strcmp(cp, "G")) 1997 bps *= 1000 * 1000 * 1000; 1998 else if (!strcmp(cp, "%")) { 1999 if (bps < 0 || bps > 100) { 2000 yyerror("bandwidth spec " 2001 "out of range"); 2002 free($1); 2003 YYERROR; 2004 } 2005 $$.bw_percent = bps; 2006 bps = 0; 2007 } else { 2008 yyerror("unknown unit %s", cp); 2009 free($1); 2010 YYERROR; 2011 } 2012 } 2013 free($1); 2014 $$.bw_absolute = (u_int64_t)bps; 2015 } 2016 | NUMBER { 2017 if ($1 < 0 || $1 >= LLONG_MAX) { 2018 yyerror("bandwidth number too big"); 2019 YYERROR; 2020 } 2021 $$.bw_percent = 0; 2022 $$.bw_absolute = $1; 2023 } 2024 ; 2025 2026 scheduler : CBQ { 2027 $$.qtype = ALTQT_CBQ; 2028 $$.data.cbq_opts.flags = 0; 2029 } 2030 | CBQ '(' cbqflags_list ')' { 2031 $$.qtype = ALTQT_CBQ; 2032 $$.data.cbq_opts.flags = $3; 2033 } 2034 | PRIQ { 2035 $$.qtype = ALTQT_PRIQ; 2036 $$.data.priq_opts.flags = 0; 2037 } 2038 | PRIQ '(' priqflags_list ')' { 2039 $$.qtype = ALTQT_PRIQ; 2040 $$.data.priq_opts.flags = $3; 2041 } 2042 | HFSC { 2043 $$.qtype = ALTQT_HFSC; 2044 bzero(&$$.data.hfsc_opts, 2045 sizeof(struct node_hfsc_opts)); 2046 } 2047 | HFSC '(' hfsc_opts ')' { 2048 $$.qtype = ALTQT_HFSC; 2049 $$.data.hfsc_opts = $3; 2050 } 2051 | FAIRQ { 2052 $$.qtype = ALTQT_FAIRQ; 2053 bzero(&$$.data.fairq_opts, 2054 sizeof(struct node_fairq_opts)); 2055 } 2056 | FAIRQ '(' fairq_opts ')' { 2057 $$.qtype = ALTQT_FAIRQ; 2058 $$.data.fairq_opts = $3; 2059 } 2060 | CODEL { 2061 $$.qtype = ALTQT_CODEL; 2062 bzero(&$$.data.codel_opts, 2063 sizeof(struct codel_opts)); 2064 } 2065 | CODEL '(' codel_opts ')' { 2066 $$.qtype = ALTQT_CODEL; 2067 $$.data.codel_opts = $3; 2068 } 2069 ; 2070 2071 cbqflags_list : cbqflags_item { $$ |= $1; } 2072 | cbqflags_list comma cbqflags_item { $$ |= $3; } 2073 ; 2074 2075 cbqflags_item : STRING { 2076 if (!strcmp($1, "default")) 2077 $$ = CBQCLF_DEFCLASS; 2078 else if (!strcmp($1, "borrow")) 2079 $$ = CBQCLF_BORROW; 2080 else if (!strcmp($1, "red")) 2081 $$ = CBQCLF_RED; 2082 else if (!strcmp($1, "ecn")) 2083 $$ = CBQCLF_RED|CBQCLF_ECN; 2084 else if (!strcmp($1, "rio")) 2085 $$ = CBQCLF_RIO; 2086 else if (!strcmp($1, "codel")) 2087 $$ = CBQCLF_CODEL; 2088 else { 2089 yyerror("unknown cbq flag \"%s\"", $1); 2090 free($1); 2091 YYERROR; 2092 } 2093 free($1); 2094 } 2095 ; 2096 2097 priqflags_list : priqflags_item { $$ |= $1; } 2098 | priqflags_list comma priqflags_item { $$ |= $3; } 2099 ; 2100 2101 priqflags_item : STRING { 2102 if (!strcmp($1, "default")) 2103 $$ = PRCF_DEFAULTCLASS; 2104 else if (!strcmp($1, "red")) 2105 $$ = PRCF_RED; 2106 else if (!strcmp($1, "ecn")) 2107 $$ = PRCF_RED|PRCF_ECN; 2108 else if (!strcmp($1, "rio")) 2109 $$ = PRCF_RIO; 2110 else if (!strcmp($1, "codel")) 2111 $$ = PRCF_CODEL; 2112 else { 2113 yyerror("unknown priq flag \"%s\"", $1); 2114 free($1); 2115 YYERROR; 2116 } 2117 free($1); 2118 } 2119 ; 2120 2121 hfsc_opts : { 2122 bzero(&hfsc_opts, 2123 sizeof(struct node_hfsc_opts)); 2124 } 2125 hfscopts_list { 2126 $$ = hfsc_opts; 2127 } 2128 ; 2129 2130 hfscopts_list : hfscopts_item 2131 | hfscopts_list comma hfscopts_item 2132 ; 2133 2134 hfscopts_item : LINKSHARE bandwidth { 2135 if (hfsc_opts.linkshare.used) { 2136 yyerror("linkshare already specified"); 2137 YYERROR; 2138 } 2139 hfsc_opts.linkshare.m2 = $2; 2140 hfsc_opts.linkshare.used = 1; 2141 } 2142 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')' 2143 { 2144 if ($5 < 0 || $5 > INT_MAX) { 2145 yyerror("timing in curve out of range"); 2146 YYERROR; 2147 } 2148 if (hfsc_opts.linkshare.used) { 2149 yyerror("linkshare already specified"); 2150 YYERROR; 2151 } 2152 hfsc_opts.linkshare.m1 = $3; 2153 hfsc_opts.linkshare.d = $5; 2154 hfsc_opts.linkshare.m2 = $7; 2155 hfsc_opts.linkshare.used = 1; 2156 } 2157 | REALTIME bandwidth { 2158 if (hfsc_opts.realtime.used) { 2159 yyerror("realtime already specified"); 2160 YYERROR; 2161 } 2162 hfsc_opts.realtime.m2 = $2; 2163 hfsc_opts.realtime.used = 1; 2164 } 2165 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')' 2166 { 2167 if ($5 < 0 || $5 > INT_MAX) { 2168 yyerror("timing in curve out of range"); 2169 YYERROR; 2170 } 2171 if (hfsc_opts.realtime.used) { 2172 yyerror("realtime already specified"); 2173 YYERROR; 2174 } 2175 hfsc_opts.realtime.m1 = $3; 2176 hfsc_opts.realtime.d = $5; 2177 hfsc_opts.realtime.m2 = $7; 2178 hfsc_opts.realtime.used = 1; 2179 } 2180 | UPPERLIMIT bandwidth { 2181 if (hfsc_opts.upperlimit.used) { 2182 yyerror("upperlimit already specified"); 2183 YYERROR; 2184 } 2185 hfsc_opts.upperlimit.m2 = $2; 2186 hfsc_opts.upperlimit.used = 1; 2187 } 2188 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')' 2189 { 2190 if ($5 < 0 || $5 > INT_MAX) { 2191 yyerror("timing in curve out of range"); 2192 YYERROR; 2193 } 2194 if (hfsc_opts.upperlimit.used) { 2195 yyerror("upperlimit already specified"); 2196 YYERROR; 2197 } 2198 hfsc_opts.upperlimit.m1 = $3; 2199 hfsc_opts.upperlimit.d = $5; 2200 hfsc_opts.upperlimit.m2 = $7; 2201 hfsc_opts.upperlimit.used = 1; 2202 } 2203 | STRING { 2204 if (!strcmp($1, "default")) 2205 hfsc_opts.flags |= HFCF_DEFAULTCLASS; 2206 else if (!strcmp($1, "red")) 2207 hfsc_opts.flags |= HFCF_RED; 2208 else if (!strcmp($1, "ecn")) 2209 hfsc_opts.flags |= HFCF_RED|HFCF_ECN; 2210 else if (!strcmp($1, "rio")) 2211 hfsc_opts.flags |= HFCF_RIO; 2212 else if (!strcmp($1, "codel")) 2213 hfsc_opts.flags |= HFCF_CODEL; 2214 else { 2215 yyerror("unknown hfsc flag \"%s\"", $1); 2216 free($1); 2217 YYERROR; 2218 } 2219 free($1); 2220 } 2221 ; 2222 2223 fairq_opts : { 2224 bzero(&fairq_opts, 2225 sizeof(struct node_fairq_opts)); 2226 } 2227 fairqopts_list { 2228 $$ = fairq_opts; 2229 } 2230 ; 2231 2232 fairqopts_list : fairqopts_item 2233 | fairqopts_list comma fairqopts_item 2234 ; 2235 2236 fairqopts_item : LINKSHARE bandwidth { 2237 if (fairq_opts.linkshare.used) { 2238 yyerror("linkshare already specified"); 2239 YYERROR; 2240 } 2241 fairq_opts.linkshare.m2 = $2; 2242 fairq_opts.linkshare.used = 1; 2243 } 2244 | LINKSHARE '(' bandwidth number bandwidth ')' { 2245 if (fairq_opts.linkshare.used) { 2246 yyerror("linkshare already specified"); 2247 YYERROR; 2248 } 2249 fairq_opts.linkshare.m1 = $3; 2250 fairq_opts.linkshare.d = $4; 2251 fairq_opts.linkshare.m2 = $5; 2252 fairq_opts.linkshare.used = 1; 2253 } 2254 | HOGS bandwidth { 2255 fairq_opts.hogs_bw = $2; 2256 } 2257 | BUCKETS number { 2258 fairq_opts.nbuckets = $2; 2259 } 2260 | STRING { 2261 if (!strcmp($1, "default")) 2262 fairq_opts.flags |= FARF_DEFAULTCLASS; 2263 else if (!strcmp($1, "red")) 2264 fairq_opts.flags |= FARF_RED; 2265 else if (!strcmp($1, "ecn")) 2266 fairq_opts.flags |= FARF_RED|FARF_ECN; 2267 else if (!strcmp($1, "rio")) 2268 fairq_opts.flags |= FARF_RIO; 2269 else if (!strcmp($1, "codel")) 2270 fairq_opts.flags |= FARF_CODEL; 2271 else { 2272 yyerror("unknown fairq flag \"%s\"", $1); 2273 free($1); 2274 YYERROR; 2275 } 2276 free($1); 2277 } 2278 ; 2279 2280 codel_opts : { 2281 bzero(&codel_opts, 2282 sizeof(struct codel_opts)); 2283 } 2284 codelopts_list { 2285 $$ = codel_opts; 2286 } 2287 ; 2288 2289 codelopts_list : codelopts_item 2290 | codelopts_list comma codelopts_item 2291 ; 2292 2293 codelopts_item : INTERVAL number { 2294 if (codel_opts.interval) { 2295 yyerror("interval already specified"); 2296 YYERROR; 2297 } 2298 codel_opts.interval = $2; 2299 } 2300 | TARGET number { 2301 if (codel_opts.target) { 2302 yyerror("target already specified"); 2303 YYERROR; 2304 } 2305 codel_opts.target = $2; 2306 } 2307 | STRING { 2308 if (!strcmp($1, "ecn")) 2309 codel_opts.ecn = 1; 2310 else { 2311 yyerror("unknown codel option \"%s\"", $1); 2312 free($1); 2313 YYERROR; 2314 } 2315 free($1); 2316 } 2317 ; 2318 2319 qassign : /* empty */ { $$ = NULL; } 2320 | qassign_item { $$ = $1; } 2321 | '{' optnl qassign_list '}' { $$ = $3; } 2322 ; 2323 2324 qassign_list : qassign_item optnl { $$ = $1; } 2325 | qassign_list comma qassign_item optnl { 2326 $1->tail->next = $3; 2327 $1->tail = $3; 2328 $$ = $1; 2329 } 2330 ; 2331 2332 qassign_item : STRING { 2333 $$ = calloc(1, sizeof(struct node_queue)); 2334 if ($$ == NULL) 2335 err(1, "qassign_item: calloc"); 2336 if (strlcpy($$->queue, $1, sizeof($$->queue)) >= 2337 sizeof($$->queue)) { 2338 yyerror("queue name '%s' too long (max " 2339 "%d chars)", $1, sizeof($$->queue)-1); 2340 free($1); 2341 free($$); 2342 YYERROR; 2343 } 2344 free($1); 2345 $$->next = NULL; 2346 $$->tail = $$; 2347 } 2348 ; 2349 2350 pfrule : action dir logquick interface route af proto fromto 2351 filter_opts 2352 { 2353 struct pfctl_rule r; 2354 struct node_state_opt *o; 2355 struct node_proto *proto; 2356 int srctrack = 0; 2357 int statelock = 0; 2358 int adaptive = 0; 2359 int defaults = 0; 2360 2361 if (check_rulestate(PFCTL_STATE_FILTER)) 2362 YYERROR; 2363 2364 pfctl_init_rule(&r); 2365 2366 r.action = $1.b1; 2367 switch ($1.b2) { 2368 case PFRULE_RETURNRST: 2369 r.rule_flag |= PFRULE_RETURNRST; 2370 r.return_ttl = $1.w; 2371 break; 2372 case PFRULE_RETURNICMP: 2373 r.rule_flag |= PFRULE_RETURNICMP; 2374 r.return_icmp = $1.w; 2375 r.return_icmp6 = $1.w2; 2376 break; 2377 case PFRULE_RETURN: 2378 r.rule_flag |= PFRULE_RETURN; 2379 r.return_icmp = $1.w; 2380 r.return_icmp6 = $1.w2; 2381 break; 2382 } 2383 r.direction = $2; 2384 r.log = $3.log; 2385 r.logif = $3.logif; 2386 r.quick = $3.quick; 2387 r.af = $6; 2388 2389 if (filteropts_to_rule(&r, &$9)) 2390 YYERROR; 2391 2392 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 2393 for (proto = $7; proto != NULL && 2394 proto->proto != IPPROTO_TCP; 2395 proto = proto->next) 2396 ; /* nothing */ 2397 if (proto == NULL && $7 != NULL) { 2398 if ($9.flags.b1 || $9.flags.b2) 2399 yyerror( 2400 "flags only apply to tcp"); 2401 if ($8.src_os) 2402 yyerror( 2403 "OS fingerprinting only " 2404 "apply to tcp"); 2405 YYERROR; 2406 } 2407 } 2408 2409 o = $9.keep.options; 2410 2411 /* 'keep state' by default on pass rules. */ 2412 if (!r.keep_state && !r.action && 2413 !($9.marker & FOM_KEEP)) { 2414 r.keep_state = PF_STATE_NORMAL; 2415 o = keep_state_defaults; 2416 defaults = 1; 2417 } 2418 2419 while (o) { 2420 struct node_state_opt *p = o; 2421 2422 switch (o->type) { 2423 case PF_STATE_OPT_MAX: 2424 if (r.max_states) { 2425 yyerror("state option 'max' " 2426 "multiple definitions"); 2427 YYERROR; 2428 } 2429 r.max_states = o->data.max_states; 2430 break; 2431 case PF_STATE_OPT_NOSYNC: 2432 if (r.rule_flag & PFRULE_NOSYNC) { 2433 yyerror("state option 'sync' " 2434 "multiple definitions"); 2435 YYERROR; 2436 } 2437 r.rule_flag |= PFRULE_NOSYNC; 2438 break; 2439 case PF_STATE_OPT_SRCTRACK: 2440 if (srctrack) { 2441 yyerror("state option " 2442 "'source-track' " 2443 "multiple definitions"); 2444 YYERROR; 2445 } 2446 srctrack = o->data.src_track; 2447 r.rule_flag |= PFRULE_SRCTRACK; 2448 break; 2449 case PF_STATE_OPT_MAX_SRC_STATES: 2450 if (r.max_src_states) { 2451 yyerror("state option " 2452 "'max-src-states' " 2453 "multiple definitions"); 2454 YYERROR; 2455 } 2456 if (o->data.max_src_states == 0) { 2457 yyerror("'max-src-states' must " 2458 "be > 0"); 2459 YYERROR; 2460 } 2461 r.max_src_states = 2462 o->data.max_src_states; 2463 r.rule_flag |= PFRULE_SRCTRACK; 2464 break; 2465 case PF_STATE_OPT_OVERLOAD: 2466 if (r.overload_tblname[0]) { 2467 yyerror("multiple 'overload' " 2468 "table definitions"); 2469 YYERROR; 2470 } 2471 if (strlcpy(r.overload_tblname, 2472 o->data.overload.tblname, 2473 PF_TABLE_NAME_SIZE) >= 2474 PF_TABLE_NAME_SIZE) { 2475 yyerror("state option: " 2476 "strlcpy"); 2477 YYERROR; 2478 } 2479 r.flush = o->data.overload.flush; 2480 break; 2481 case PF_STATE_OPT_MAX_SRC_CONN: 2482 if (r.max_src_conn) { 2483 yyerror("state option " 2484 "'max-src-conn' " 2485 "multiple definitions"); 2486 YYERROR; 2487 } 2488 if (o->data.max_src_conn == 0) { 2489 yyerror("'max-src-conn' " 2490 "must be > 0"); 2491 YYERROR; 2492 } 2493 r.max_src_conn = 2494 o->data.max_src_conn; 2495 r.rule_flag |= PFRULE_SRCTRACK | 2496 PFRULE_RULESRCTRACK; 2497 break; 2498 case PF_STATE_OPT_MAX_SRC_CONN_RATE: 2499 if (r.max_src_conn_rate.limit) { 2500 yyerror("state option " 2501 "'max-src-conn-rate' " 2502 "multiple definitions"); 2503 YYERROR; 2504 } 2505 if (!o->data.max_src_conn_rate.limit || 2506 !o->data.max_src_conn_rate.seconds) { 2507 yyerror("'max-src-conn-rate' " 2508 "values must be > 0"); 2509 YYERROR; 2510 } 2511 if (o->data.max_src_conn_rate.limit > 2512 PF_THRESHOLD_MAX) { 2513 yyerror("'max-src-conn-rate' " 2514 "maximum rate must be < %u", 2515 PF_THRESHOLD_MAX); 2516 YYERROR; 2517 } 2518 r.max_src_conn_rate.limit = 2519 o->data.max_src_conn_rate.limit; 2520 r.max_src_conn_rate.seconds = 2521 o->data.max_src_conn_rate.seconds; 2522 r.rule_flag |= PFRULE_SRCTRACK | 2523 PFRULE_RULESRCTRACK; 2524 break; 2525 case PF_STATE_OPT_MAX_SRC_NODES: 2526 if (r.max_src_nodes) { 2527 yyerror("state option " 2528 "'max-src-nodes' " 2529 "multiple definitions"); 2530 YYERROR; 2531 } 2532 if (o->data.max_src_nodes == 0) { 2533 yyerror("'max-src-nodes' must " 2534 "be > 0"); 2535 YYERROR; 2536 } 2537 r.max_src_nodes = 2538 o->data.max_src_nodes; 2539 r.rule_flag |= PFRULE_SRCTRACK | 2540 PFRULE_RULESRCTRACK; 2541 break; 2542 case PF_STATE_OPT_STATELOCK: 2543 if (statelock) { 2544 yyerror("state locking option: " 2545 "multiple definitions"); 2546 YYERROR; 2547 } 2548 statelock = 1; 2549 r.rule_flag |= o->data.statelock; 2550 break; 2551 case PF_STATE_OPT_SLOPPY: 2552 if (r.rule_flag & PFRULE_STATESLOPPY) { 2553 yyerror("state sloppy option: " 2554 "multiple definitions"); 2555 YYERROR; 2556 } 2557 r.rule_flag |= PFRULE_STATESLOPPY; 2558 break; 2559 case PF_STATE_OPT_PFLOW: 2560 if (r.rule_flag & PFRULE_PFLOW) { 2561 yyerror("state pflow option: " 2562 "multiple definitions"); 2563 YYERROR; 2564 } 2565 r.rule_flag |= PFRULE_PFLOW; 2566 break; 2567 case PF_STATE_OPT_ALLOW_RELATED: 2568 if (r.rule_flag & PFRULE_ALLOW_RELATED) { 2569 yyerror("state allow-related option: " 2570 "multiple definitions"); 2571 YYERROR; 2572 } 2573 r.rule_flag |= PFRULE_ALLOW_RELATED; 2574 break; 2575 case PF_STATE_OPT_TIMEOUT: 2576 if (o->data.timeout.number == 2577 PFTM_ADAPTIVE_START || 2578 o->data.timeout.number == 2579 PFTM_ADAPTIVE_END) 2580 adaptive = 1; 2581 if (r.timeout[o->data.timeout.number]) { 2582 yyerror("state timeout %s " 2583 "multiple definitions", 2584 pf_timeouts[o->data. 2585 timeout.number].name); 2586 YYERROR; 2587 } 2588 r.timeout[o->data.timeout.number] = 2589 o->data.timeout.seconds; 2590 } 2591 o = o->next; 2592 if (!defaults) 2593 free(p); 2594 } 2595 2596 /* 'flags S/SA' by default on stateful rules */ 2597 if (!r.action && !r.flags && !r.flagset && 2598 !$9.fragment && !($9.marker & FOM_FLAGS) && 2599 r.keep_state) { 2600 r.flags = parse_flags("S"); 2601 r.flagset = parse_flags("SA"); 2602 } 2603 if (!adaptive && r.max_states) { 2604 r.timeout[PFTM_ADAPTIVE_START] = 2605 (r.max_states / 10) * 6; 2606 r.timeout[PFTM_ADAPTIVE_END] = 2607 (r.max_states / 10) * 12; 2608 } 2609 if (r.rule_flag & PFRULE_SRCTRACK) { 2610 if (srctrack == PF_SRCTRACK_GLOBAL && 2611 r.max_src_nodes) { 2612 yyerror("'max-src-nodes' is " 2613 "incompatible with " 2614 "'source-track global'"); 2615 YYERROR; 2616 } 2617 if (srctrack == PF_SRCTRACK_GLOBAL && 2618 r.max_src_conn) { 2619 yyerror("'max-src-conn' is " 2620 "incompatible with " 2621 "'source-track global'"); 2622 YYERROR; 2623 } 2624 if (srctrack == PF_SRCTRACK_GLOBAL && 2625 r.max_src_conn_rate.seconds) { 2626 yyerror("'max-src-conn-rate' is " 2627 "incompatible with " 2628 "'source-track global'"); 2629 YYERROR; 2630 } 2631 if (r.timeout[PFTM_SRC_NODE] < 2632 r.max_src_conn_rate.seconds) 2633 r.timeout[PFTM_SRC_NODE] = 2634 r.max_src_conn_rate.seconds; 2635 r.rule_flag |= PFRULE_SRCTRACK; 2636 if (srctrack == PF_SRCTRACK_RULE) 2637 r.rule_flag |= PFRULE_RULESRCTRACK; 2638 } 2639 if (r.keep_state && !statelock) 2640 r.rule_flag |= default_statelock; 2641 2642 decide_address_family($8.src.host, &r.af); 2643 decide_address_family($8.dst.host, &r.af); 2644 2645 if ($5.rt) { 2646 if (!r.direction) { 2647 yyerror("direction must be explicit " 2648 "with rules that specify routing"); 2649 YYERROR; 2650 } 2651 r.rt = $5.rt; 2652 2653 if (!($5.redirspec->pool_opts.opts & PF_POOL_IPV6NH)) { 2654 decide_address_family($5.redirspec->host, &r.af); 2655 if (!(r.rule_flag & PFRULE_AFTO)) 2656 remove_invalid_hosts(&($5.redirspec->host), &r.af); 2657 if ($5.redirspec->host == NULL) { 2658 yyerror("no routing address with " 2659 "matching address family found."); 2660 YYERROR; 2661 } 2662 } 2663 } 2664 #ifdef __FreeBSD__ 2665 r.divert.port = $9.divert.port; 2666 #else 2667 if ((r.divert.port = $9.divert.port)) { 2668 if (r.direction == PF_OUT) { 2669 if ($9.divert.addr) { 2670 yyerror("address specified " 2671 "for outgoing divert"); 2672 YYERROR; 2673 } 2674 bzero(&r.divert.addr, 2675 sizeof(r.divert.addr)); 2676 } else { 2677 if (!$9.divert.addr) { 2678 yyerror("no address specified " 2679 "for incoming divert"); 2680 YYERROR; 2681 } 2682 if ($9.divert.addr->af != r.af) { 2683 yyerror("address family " 2684 "mismatch for divert"); 2685 YYERROR; 2686 } 2687 r.divert.addr = 2688 $9.divert.addr->addr.v.a.addr; 2689 } 2690 } 2691 #endif 2692 2693 if ($9.dnpipe || $9.dnrpipe) { 2694 r.dnpipe = $9.dnpipe; 2695 r.dnrpipe = $9.dnrpipe; 2696 if ($9.free_flags & PFRULE_DN_IS_PIPE) 2697 r.free_flags |= PFRULE_DN_IS_PIPE; 2698 else 2699 r.free_flags |= PFRULE_DN_IS_QUEUE; 2700 } 2701 2702 if ($9.marker & FOM_AFTO) { 2703 r.naf = $9.nat->af; 2704 } else { 2705 if ($9.nat) { 2706 if (!r.af && ! $9.nat->host->ifindex) 2707 r.af = $9.nat->host->af; 2708 remove_invalid_hosts(&($9.nat->host), &r.af); 2709 if (invalid_redirect($9.nat->host, r.af)) 2710 YYERROR; 2711 if ($9.nat->host->addr.type == PF_ADDR_DYNIFTL) { 2712 if (($9.nat->host = gen_dynnode($9.nat->host, r.af)) == NULL) 2713 err(1, "calloc"); 2714 } 2715 if (check_netmask($9.nat->host, r.af)) 2716 YYERROR; 2717 } 2718 if ($9.rdr) { 2719 if (!r.af && ! $9.rdr->host->ifindex) 2720 r.af = $9.rdr->host->af; 2721 remove_invalid_hosts(&($9.rdr->host), &r.af); 2722 if (invalid_redirect($9.rdr->host, r.af)) 2723 YYERROR; 2724 if ($9.rdr->host->addr.type == PF_ADDR_DYNIFTL) { 2725 if (($9.rdr->host = gen_dynnode($9.rdr->host, r.af)) == NULL) 2726 err(1, "calloc"); 2727 } 2728 if (check_netmask($9.rdr->host, r.af)) 2729 YYERROR; 2730 } 2731 } 2732 2733 expand_rule(&r, false, $4, $9.nat, $9.rdr, $5.redirspec, 2734 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host, 2735 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec, ""); 2736 } 2737 ; 2738 2739 filter_opts : { 2740 bzero(&filter_opts, sizeof filter_opts); 2741 filter_opts.rtableid = -1; 2742 } 2743 filter_opts_l 2744 { $$ = filter_opts; } 2745 | /* empty */ { 2746 bzero(&filter_opts, sizeof filter_opts); 2747 filter_opts.rtableid = -1; 2748 $$ = filter_opts; 2749 } 2750 ; 2751 2752 filter_opts_l : filter_opts_l filter_opt 2753 | filter_opt 2754 ; 2755 2756 filter_opt : USER uids { 2757 if (filter_opts.uid) 2758 $2->tail->next = filter_opts.uid; 2759 filter_opts.uid = $2; 2760 } 2761 | GROUP gids { 2762 if (filter_opts.gid) 2763 $2->tail->next = filter_opts.gid; 2764 filter_opts.gid = $2; 2765 } 2766 | flags { 2767 if (filter_opts.marker & FOM_FLAGS) { 2768 yyerror("flags cannot be redefined"); 2769 YYERROR; 2770 } 2771 filter_opts.marker |= FOM_FLAGS; 2772 filter_opts.flags.b1 |= $1.b1; 2773 filter_opts.flags.b2 |= $1.b2; 2774 filter_opts.flags.w |= $1.w; 2775 filter_opts.flags.w2 |= $1.w2; 2776 } 2777 | icmpspec { 2778 if (filter_opts.marker & FOM_ICMP) { 2779 yyerror("icmp-type cannot be redefined"); 2780 YYERROR; 2781 } 2782 filter_opts.marker |= FOM_ICMP; 2783 filter_opts.icmpspec = $1; 2784 } 2785 | PRIO NUMBER { 2786 if (filter_opts.marker & FOM_PRIO) { 2787 yyerror("prio cannot be redefined"); 2788 YYERROR; 2789 } 2790 if ($2 < 0 || $2 > PF_PRIO_MAX) { 2791 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 2792 YYERROR; 2793 } 2794 filter_opts.marker |= FOM_PRIO; 2795 filter_opts.prio = $2; 2796 } 2797 | TOS tos { 2798 if (filter_opts.marker & FOM_TOS) { 2799 yyerror("tos cannot be redefined"); 2800 YYERROR; 2801 } 2802 filter_opts.marker |= FOM_TOS; 2803 filter_opts.tos = $2; 2804 } 2805 | keep { 2806 if (filter_opts.marker & FOM_KEEP) { 2807 yyerror("modulate or keep cannot be redefined"); 2808 YYERROR; 2809 } 2810 filter_opts.marker |= FOM_KEEP; 2811 filter_opts.keep.action = $1.action; 2812 filter_opts.keep.options = $1.options; 2813 } 2814 | RIDENTIFIER number { 2815 filter_opts.ridentifier = $2; 2816 } 2817 | FRAGMENT { 2818 filter_opts.fragment = 1; 2819 } 2820 | ALLOWOPTS { 2821 filter_opts.allowopts = 1; 2822 } 2823 | label { 2824 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) { 2825 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT); 2826 YYERROR; 2827 } 2828 filter_opts.label[filter_opts.labelcount++] = $1; 2829 } 2830 | qname { 2831 if (filter_opts.queues.qname) { 2832 yyerror("queue cannot be redefined"); 2833 YYERROR; 2834 } 2835 filter_opts.queues = $1; 2836 } 2837 | DNPIPE number { 2838 filter_opts.dnpipe = $2; 2839 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2840 } 2841 | DNPIPE '(' number ')' { 2842 filter_opts.dnpipe = $3; 2843 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2844 } 2845 | DNPIPE '(' number comma number ')' { 2846 filter_opts.dnrpipe = $5; 2847 filter_opts.dnpipe = $3; 2848 filter_opts.free_flags |= PFRULE_DN_IS_PIPE; 2849 } 2850 | DNQUEUE number { 2851 filter_opts.dnpipe = $2; 2852 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2853 } 2854 | DNQUEUE '(' number comma number ')' { 2855 filter_opts.dnrpipe = $5; 2856 filter_opts.dnpipe = $3; 2857 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2858 } 2859 | DNQUEUE '(' number ')' { 2860 filter_opts.dnpipe = $3; 2861 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE; 2862 } 2863 | TAG string { 2864 filter_opts.tag = $2; 2865 } 2866 | not TAGGED string { 2867 filter_opts.match_tag = $3; 2868 filter_opts.match_tag_not = $1; 2869 } 2870 | not RECEIVEDON if_item { 2871 if (filter_opts.rcv) { 2872 yyerror("cannot respecify received-on"); 2873 YYERROR; 2874 } 2875 filter_opts.rcv = $3; 2876 filter_opts.rcv->not = $1; 2877 } 2878 | PROBABILITY probability { 2879 double p; 2880 2881 p = floor($2 * UINT_MAX + 0.5); 2882 if (p < 0.0 || p > UINT_MAX) { 2883 yyerror("invalid probability: %lf", p); 2884 YYERROR; 2885 } 2886 filter_opts.prob = (u_int32_t)p; 2887 if (filter_opts.prob == 0) 2888 filter_opts.prob = 1; 2889 } 2890 | RTABLE NUMBER { 2891 if ($2 < 0 || $2 > rt_tableid_max()) { 2892 yyerror("invalid rtable id"); 2893 YYERROR; 2894 } 2895 filter_opts.rtableid = $2; 2896 } 2897 | DIVERTTO portplain { 2898 #ifdef __FreeBSD__ 2899 filter_opts.divert.port = $2.a; 2900 if (!filter_opts.divert.port) { 2901 yyerror("invalid divert port: %u", ntohs($2.a)); 2902 YYERROR; 2903 } 2904 #endif 2905 } 2906 | DIVERTTO STRING PORT portplain { 2907 #ifndef __FreeBSD__ 2908 if ((filter_opts.divert.addr = host($2, pf->opts)) == NULL) { 2909 yyerror("could not parse divert address: %s", 2910 $2); 2911 free($2); 2912 YYERROR; 2913 } 2914 #else 2915 if ($2) 2916 #endif 2917 free($2); 2918 filter_opts.divert.port = $4.a; 2919 if (!filter_opts.divert.port) { 2920 yyerror("invalid divert port: %u", ntohs($4.a)); 2921 YYERROR; 2922 } 2923 } 2924 | DIVERTREPLY { 2925 #ifdef __FreeBSD__ 2926 yyerror("divert-reply has no meaning in FreeBSD pf(4)"); 2927 YYERROR; 2928 #else 2929 filter_opts.divert.port = 1; /* some random value */ 2930 #endif 2931 } 2932 | SCRUB '(' scrub_opts ')' { 2933 filter_opts.nodf = $3.nodf; 2934 filter_opts.minttl = $3.minttl; 2935 if ($3.marker & FOM_SETTOS) { 2936 /* Old style rules are "scrub set-tos 0x42" 2937 * New style are "set tos 0x42 scrub (...)" 2938 * What is in "scrub(...)"" is unfortunately the 2939 * original scrub syntax so it would overwrite 2940 * "set tos" of a pass/match rule. 2941 */ 2942 filter_opts.settos = $3.settos; 2943 } 2944 filter_opts.randomid = $3.randomid; 2945 filter_opts.max_mss = $3.maxmss; 2946 if ($3.reassemble_tcp) 2947 filter_opts.marker |= FOM_SCRUB_TCP; 2948 filter_opts.marker |= $3.marker; 2949 } 2950 | NATTO port_redirspec { 2951 if (filter_opts.nat) { 2952 yyerror("cannot respecify nat-to/binat-to"); 2953 YYERROR; 2954 } 2955 filter_opts.nat = $2; 2956 } 2957 | RDRTO port_redirspec { 2958 if (filter_opts.rdr) { 2959 yyerror("cannot respecify rdr-to"); 2960 YYERROR; 2961 } 2962 filter_opts.rdr = $2; 2963 } 2964 | BINATTO port_redirspec { 2965 if (filter_opts.nat) { 2966 yyerror("cannot respecify nat-to/binat-to"); 2967 YYERROR; 2968 } 2969 filter_opts.nat = $2; 2970 filter_opts.nat->binat = 1; 2971 filter_opts.nat->pool_opts.staticport = 1; 2972 } 2973 | AFTO af FROM port_redirspec { 2974 if (filter_opts.nat) { 2975 yyerror("cannot respecify af-to"); 2976 YYERROR; 2977 } 2978 if ($2 == 0) { 2979 yyerror("no address family specified"); 2980 YYERROR; 2981 } 2982 2983 filter_opts.nat = $4; 2984 filter_opts.nat->af = $2; 2985 remove_invalid_hosts(&($4->host), &(filter_opts.nat->af)); 2986 if ($4->host == NULL) { 2987 yyerror("af-to addresses must be in the " 2988 "target address family"); 2989 YYERROR; 2990 } 2991 filter_opts.marker |= FOM_AFTO; 2992 } 2993 | AFTO af FROM port_redirspec TO port_redirspec { 2994 if (filter_opts.nat) { 2995 yyerror("cannot respecify af-to"); 2996 YYERROR; 2997 } 2998 if ($2 == 0) { 2999 yyerror("no address family specified"); 3000 YYERROR; 3001 } 3002 filter_opts.nat = $4; 3003 filter_opts.nat->af = $2; 3004 filter_opts.rdr = $6; 3005 filter_opts.rdr->af = $2; 3006 remove_invalid_hosts(&($4->host), &(filter_opts.nat->af)); 3007 remove_invalid_hosts(&($6->host), &(filter_opts.rdr->af)); 3008 if ($4->host == NULL || $6->host == NULL) { 3009 yyerror("af-to addresses must be in the " 3010 "target address family"); 3011 YYERROR; 3012 } 3013 filter_opts.marker |= FOM_AFTO; 3014 } 3015 | MAXPKTRATE NUMBER '/' NUMBER { 3016 if ($2 < 0 || $2 > UINT_MAX || 3017 $4 < 0 || $4 > UINT_MAX) { 3018 yyerror("only positive values permitted"); 3019 YYERROR; 3020 } 3021 if (filter_opts.pktrate.limit) { 3022 yyerror("cannot respecify max-pkt-rate"); 3023 YYERROR; 3024 } 3025 filter_opts.pktrate.limit = $2; 3026 filter_opts.pktrate.seconds = $4; 3027 } 3028 | MAXPKTSIZE NUMBER { 3029 if ($2 < 0 || $2 > UINT16_MAX) { 3030 yyerror("only positive values permitted"); 3031 YYERROR; 3032 } 3033 filter_opts.max_pkt_size = $2; 3034 } 3035 | filter_sets 3036 ; 3037 3038 filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; } 3039 | SET filter_set { $$ = filter_opts; } 3040 ; 3041 3042 filter_sets_l : filter_sets_l comma filter_set 3043 | filter_set 3044 ; 3045 3046 filter_set : prio { 3047 if (filter_opts.marker & FOM_SETPRIO) { 3048 yyerror("prio cannot be redefined"); 3049 YYERROR; 3050 } 3051 filter_opts.marker |= FOM_SETPRIO; 3052 filter_opts.set_prio[0] = $1.b1; 3053 filter_opts.set_prio[1] = $1.b2; 3054 } 3055 | TOS tos { 3056 if (filter_opts.marker & FOM_SETTOS) { 3057 yyerror("tos cannot be respecified"); 3058 YYERROR; 3059 } 3060 filter_opts.marker |= FOM_SETTOS; 3061 filter_opts.settos = $2; 3062 } 3063 prio : PRIO NUMBER { 3064 if ($2 < 0 || $2 > PF_PRIO_MAX) { 3065 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 3066 YYERROR; 3067 } 3068 $$.b1 = $$.b2 = $2; 3069 } 3070 | PRIO '(' NUMBER comma NUMBER ')' { 3071 if ($3 < 0 || $3 > PF_PRIO_MAX || 3072 $5 < 0 || $5 > PF_PRIO_MAX) { 3073 yyerror("prio must be 0 - %u", PF_PRIO_MAX); 3074 YYERROR; 3075 } 3076 $$.b1 = $3; 3077 $$.b2 = $5; 3078 } 3079 ; 3080 3081 probability : STRING { 3082 char *e; 3083 double p = strtod($1, &e); 3084 3085 if (*e == '%') { 3086 p *= 0.01; 3087 e++; 3088 } 3089 if (*e) { 3090 yyerror("invalid probability: %s", $1); 3091 free($1); 3092 YYERROR; 3093 } 3094 free($1); 3095 $$ = p; 3096 } 3097 | NUMBER { 3098 $$ = (double)$1; 3099 } 3100 ; 3101 3102 3103 action : PASS { 3104 $$.b1 = PF_PASS; 3105 $$.b2 = failpolicy; 3106 $$.w = returnicmpdefault; 3107 $$.w2 = returnicmp6default; 3108 } 3109 | MATCH { $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; } 3110 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 3111 ; 3112 3113 blockspec : /* empty */ { 3114 $$.b2 = blockpolicy; 3115 $$.w = returnicmpdefault; 3116 $$.w2 = returnicmp6default; 3117 } 3118 | DROP { 3119 $$.b2 = PFRULE_DROP; 3120 $$.w = 0; 3121 $$.w2 = 0; 3122 } 3123 | RETURNRST { 3124 $$.b2 = PFRULE_RETURNRST; 3125 $$.w = 0; 3126 $$.w2 = 0; 3127 } 3128 | RETURNRST '(' TTL NUMBER ')' { 3129 if ($4 < 0 || $4 > 255) { 3130 yyerror("illegal ttl value %d", $4); 3131 YYERROR; 3132 } 3133 $$.b2 = PFRULE_RETURNRST; 3134 $$.w = $4; 3135 $$.w2 = 0; 3136 } 3137 | RETURNICMP { 3138 $$.b2 = PFRULE_RETURNICMP; 3139 $$.w = returnicmpdefault; 3140 $$.w2 = returnicmp6default; 3141 } 3142 | RETURNICMP6 { 3143 $$.b2 = PFRULE_RETURNICMP; 3144 $$.w = returnicmpdefault; 3145 $$.w2 = returnicmp6default; 3146 } 3147 | RETURNICMP '(' reticmpspec ')' { 3148 $$.b2 = PFRULE_RETURNICMP; 3149 $$.w = $3; 3150 $$.w2 = returnicmpdefault; 3151 } 3152 | RETURNICMP6 '(' reticmp6spec ')' { 3153 $$.b2 = PFRULE_RETURNICMP; 3154 $$.w = returnicmpdefault; 3155 $$.w2 = $3; 3156 } 3157 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' { 3158 $$.b2 = PFRULE_RETURNICMP; 3159 $$.w = $3; 3160 $$.w2 = $5; 3161 } 3162 | RETURN { 3163 $$.b2 = PFRULE_RETURN; 3164 $$.w = returnicmpdefault; 3165 $$.w2 = returnicmp6default; 3166 } 3167 ; 3168 3169 reticmpspec : STRING { 3170 if (!($$ = parseicmpspec($1, AF_INET))) { 3171 free($1); 3172 YYERROR; 3173 } 3174 free($1); 3175 } 3176 | NUMBER { 3177 u_int8_t icmptype; 3178 3179 if ($1 < 0 || $1 > 255) { 3180 yyerror("invalid icmp code %lu", $1); 3181 YYERROR; 3182 } 3183 icmptype = returnicmpdefault >> 8; 3184 $$ = (icmptype << 8 | $1); 3185 } 3186 ; 3187 3188 reticmp6spec : STRING { 3189 if (!($$ = parseicmpspec($1, AF_INET6))) { 3190 free($1); 3191 YYERROR; 3192 } 3193 free($1); 3194 } 3195 | NUMBER { 3196 u_int8_t icmptype; 3197 3198 if ($1 < 0 || $1 > 255) { 3199 yyerror("invalid icmp code %lu", $1); 3200 YYERROR; 3201 } 3202 icmptype = returnicmp6default >> 8; 3203 $$ = (icmptype << 8 | $1); 3204 } 3205 ; 3206 3207 dir : /* empty */ { $$ = PF_INOUT; } 3208 | IN { $$ = PF_IN; } 3209 | OUT { $$ = PF_OUT; } 3210 ; 3211 3212 quick : /* empty */ { $$.quick = 0; } 3213 | QUICK { $$.quick = 1; } 3214 ; 3215 3216 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; } 3217 | log { $$ = $1; $$.quick = 0; } 3218 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; } 3219 | log QUICK { $$ = $1; $$.quick = 1; } 3220 | QUICK log { $$ = $2; $$.quick = 1; } 3221 ; 3222 3223 log : LOG { $$.log = PF_LOG; $$.logif = 0; } 3224 | LOG '(' logopts ')' { 3225 $$.log = PF_LOG | $3.log; 3226 $$.logif = $3.logif; 3227 } 3228 ; 3229 3230 logopts : logopt { $$ = $1; } 3231 | logopts comma logopt { 3232 $$.log = $1.log | $3.log; 3233 $$.logif = $3.logif; 3234 if ($$.logif == 0) 3235 $$.logif = $1.logif; 3236 } 3237 ; 3238 3239 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; } 3240 | MATCHES { $$.log = PF_LOG_MATCHES; $$.logif = 0; } 3241 | USER { $$.log = PF_LOG_USER; $$.logif = 0; } 3242 | TO string { 3243 const char *errstr; 3244 u_int i; 3245 3246 $$.log = 0; 3247 if (strncmp($2, "pflog", 5)) { 3248 yyerror("%s: should be a pflog interface", $2); 3249 free($2); 3250 YYERROR; 3251 } 3252 i = strtonum($2 + 5, 0, 255, &errstr); 3253 if (errstr) { 3254 yyerror("%s: %s", $2, errstr); 3255 free($2); 3256 YYERROR; 3257 } 3258 free($2); 3259 $$.logif = i; 3260 } 3261 ; 3262 3263 interface : /* empty */ { $$ = NULL; } 3264 | ON if_item_not { $$ = $2; } 3265 | ON '{' optnl if_list '}' { $$ = $4; } 3266 ; 3267 3268 if_list : if_item_not optnl { $$ = $1; } 3269 | if_list comma if_item_not optnl { 3270 $1->tail->next = $3; 3271 $1->tail = $3; 3272 $$ = $1; 3273 } 3274 ; 3275 3276 if_item_not : not if_item { $$ = $2; $$->not = $1; } 3277 ; 3278 3279 if_item : STRING { 3280 struct node_host *n; 3281 3282 $$ = calloc(1, sizeof(struct node_if)); 3283 if ($$ == NULL) 3284 err(1, "if_item: calloc"); 3285 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 3286 sizeof($$->ifname)) { 3287 free($1); 3288 free($$); 3289 yyerror("interface name too long"); 3290 YYERROR; 3291 } 3292 3293 if ((n = ifa_exists($1)) != NULL) 3294 $$->ifa_flags = n->ifa_flags; 3295 3296 free($1); 3297 $$->not = 0; 3298 $$->next = NULL; 3299 $$->tail = $$; 3300 } 3301 | ANY { 3302 $$ = calloc(1, sizeof(struct node_if)); 3303 if ($$ == NULL) 3304 err(1, "if_item: calloc"); 3305 strlcpy($$->ifname, "any", sizeof($$->ifname)); 3306 $$->not = 0; 3307 $$->next = NULL; 3308 $$->tail = $$; 3309 } 3310 ; 3311 3312 af : /* empty */ { $$ = 0; } 3313 | INET { $$ = AF_INET; } 3314 | INET6 { $$ = AF_INET6; } 3315 ; 3316 3317 etherproto : /* empty */ { $$ = NULL; } 3318 | PROTO etherproto_item { $$ = $2; } 3319 | PROTO '{' optnl etherproto_list '}' { $$ = $4; } 3320 ; 3321 3322 etherproto_list : etherproto_item optnl { $$ = $1; } 3323 | etherproto_list comma etherproto_item optnl { 3324 $1->tail->next = $3; 3325 $1->tail = $3; 3326 $$ = $1; 3327 } 3328 ; 3329 3330 etherproto_item : etherprotoval { 3331 u_int16_t pr; 3332 3333 pr = (u_int16_t)$1; 3334 if (pr == 0) { 3335 yyerror("proto 0 cannot be used"); 3336 YYERROR; 3337 } 3338 $$ = calloc(1, sizeof(struct node_proto)); 3339 if ($$ == NULL) 3340 err(1, "proto_item: calloc"); 3341 $$->proto = pr; 3342 $$->next = NULL; 3343 $$->tail = $$; 3344 } 3345 ; 3346 3347 etherprotoval : NUMBER { 3348 if ($1 < 0 || $1 > 65565) { 3349 yyerror("protocol outside range"); 3350 YYERROR; 3351 } 3352 } 3353 | STRING 3354 { 3355 if (!strncmp($1, "0x", 2)) { 3356 if (sscanf($1, "0x%4x", &$$) != 1) { 3357 free($1); 3358 yyerror("invalid EtherType hex"); 3359 YYERROR; 3360 } 3361 } else { 3362 yyerror("Symbolic EtherType not yet supported"); 3363 } 3364 } 3365 ; 3366 3367 proto : /* empty */ { $$ = NULL; } 3368 | PROTO proto_item { $$ = $2; } 3369 | PROTO '{' optnl proto_list '}' { $$ = $4; } 3370 ; 3371 3372 proto_list : proto_item optnl { $$ = $1; } 3373 | proto_list comma proto_item optnl { 3374 $1->tail->next = $3; 3375 $1->tail = $3; 3376 $$ = $1; 3377 } 3378 ; 3379 3380 proto_item : protoval { 3381 u_int8_t pr; 3382 3383 pr = (u_int8_t)$1; 3384 if (pr == 0) { 3385 yyerror("proto 0 cannot be used"); 3386 YYERROR; 3387 } 3388 $$ = calloc(1, sizeof(struct node_proto)); 3389 if ($$ == NULL) 3390 err(1, "proto_item: calloc"); 3391 $$->proto = pr; 3392 $$->next = NULL; 3393 $$->tail = $$; 3394 } 3395 ; 3396 3397 protoval : STRING { 3398 struct protoent *p; 3399 3400 p = getprotobyname($1); 3401 if (p == NULL) { 3402 yyerror("unknown protocol %s", $1); 3403 free($1); 3404 YYERROR; 3405 } 3406 $$ = p->p_proto; 3407 free($1); 3408 } 3409 | NUMBER { 3410 if ($1 < 0 || $1 > 255) { 3411 yyerror("protocol outside range"); 3412 YYERROR; 3413 } 3414 } 3415 ; 3416 3417 l3fromto : /* empty */ { 3418 bzero(&$$, sizeof($$)); 3419 } 3420 | L3 fromto { 3421 if ($2.src.host != NULL && 3422 $2.src.host->addr.type != PF_ADDR_ADDRMASK && 3423 $2.src.host->addr.type != PF_ADDR_TABLE) { 3424 yyerror("from must be an address or table"); 3425 YYERROR; 3426 } 3427 if ($2.dst.host != NULL && 3428 $2.dst.host->addr.type != PF_ADDR_ADDRMASK && 3429 $2.dst.host->addr.type != PF_ADDR_TABLE) { 3430 yyerror("to must be an address or table"); 3431 YYERROR; 3432 } 3433 $$ = $2; 3434 } 3435 ; 3436 etherfromto : ALL { 3437 $$.src = NULL; 3438 $$.dst = NULL; 3439 } 3440 | etherfrom etherto { 3441 $$.src = $1.mac; 3442 $$.dst = $2.mac; 3443 } 3444 ; 3445 3446 etherfrom : /* emtpy */ { 3447 bzero(&$$, sizeof($$)); 3448 } 3449 | FROM macspec { 3450 $$.mac = $2; 3451 } 3452 ; 3453 3454 etherto : /* empty */ { 3455 bzero(&$$, sizeof($$)); 3456 } 3457 | TO macspec { 3458 $$.mac = $2; 3459 } 3460 ; 3461 3462 mac : string '/' NUMBER { 3463 $$ = node_mac_from_string_masklen($1, $3); 3464 free($1); 3465 if ($$ == NULL) 3466 YYERROR; 3467 } 3468 | string { 3469 if (strchr($1, '&')) { 3470 /* mac&mask */ 3471 char *mac = strtok($1, "&"); 3472 char *mask = strtok(NULL, "&"); 3473 $$ = node_mac_from_string_mask(mac, mask); 3474 } else { 3475 $$ = node_mac_from_string($1); 3476 } 3477 free($1); 3478 if ($$ == NULL) 3479 YYERROR; 3480 3481 } 3482 xmac : not mac { 3483 struct node_mac *n; 3484 3485 for (n = $2; n != NULL; n = n->next) 3486 n->neg = $1; 3487 $$ = $2; 3488 } 3489 ; 3490 macspec : xmac { 3491 $$ = $1; 3492 } 3493 | '{' optnl mac_list '}' 3494 { 3495 $$ = $3; 3496 } 3497 ; 3498 mac_list : xmac optnl { 3499 $$ = $1; 3500 } 3501 | mac_list comma xmac { 3502 if ($3 == NULL) 3503 $$ = $1; 3504 else if ($1 == NULL) 3505 $$ = $3; 3506 else { 3507 $1->tail->next = $3; 3508 $1->tail = $3->tail; 3509 $$ = $1; 3510 } 3511 } 3512 3513 fromto : ALL { 3514 $$.src.host = NULL; 3515 $$.src.port = NULL; 3516 $$.dst.host = NULL; 3517 $$.dst.port = NULL; 3518 $$.src_os = NULL; 3519 } 3520 | from os to { 3521 $$.src = $1; 3522 $$.src_os = $2; 3523 $$.dst = $3; 3524 } 3525 ; 3526 3527 os : /* empty */ { $$ = NULL; } 3528 | OS xos { $$ = $2; } 3529 | OS '{' optnl os_list '}' { $$ = $4; } 3530 ; 3531 3532 xos : STRING { 3533 $$ = calloc(1, sizeof(struct node_os)); 3534 if ($$ == NULL) 3535 err(1, "os: calloc"); 3536 $$->os = $1; 3537 $$->tail = $$; 3538 } 3539 ; 3540 3541 os_list : xos optnl { $$ = $1; } 3542 | os_list comma xos optnl { 3543 $1->tail->next = $3; 3544 $1->tail = $3; 3545 $$ = $1; 3546 } 3547 ; 3548 3549 from : /* empty */ { 3550 $$.host = NULL; 3551 $$.port = NULL; 3552 } 3553 | FROM ipportspec { 3554 $$ = $2; 3555 } 3556 ; 3557 3558 to : /* empty */ { 3559 $$.host = NULL; 3560 $$.port = NULL; 3561 } 3562 | TO ipportspec { 3563 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is " 3564 "not permitted in a destination address")) 3565 YYERROR; 3566 $$ = $2; 3567 } 3568 ; 3569 3570 ipportspec : ipspec { 3571 $$.host = $1; 3572 $$.port = NULL; 3573 } 3574 | ipspec PORT portspec { 3575 $$.host = $1; 3576 $$.port = $3; 3577 } 3578 | PORT portspec { 3579 $$.host = NULL; 3580 $$.port = $2; 3581 } 3582 ; 3583 3584 optnl : '\n' optnl 3585 | 3586 ; 3587 3588 ipspec : ANY { $$ = NULL; } 3589 | xhost { $$ = $1; } 3590 | '{' optnl host_list '}' { $$ = $3; } 3591 ; 3592 3593 toipspec : TO ipspec { $$ = $2; } 3594 | /* empty */ { $$ = NULL; } 3595 ; 3596 3597 host_list : ipspec optnl { $$ = $1; } 3598 | host_list comma ipspec optnl { 3599 if ($1 == NULL) { 3600 freehostlist($3); 3601 $$ = $1; 3602 } else if ($3 == NULL) { 3603 freehostlist($1); 3604 $$ = $3; 3605 } else { 3606 $1->tail->next = $3; 3607 $1->tail = $3->tail; 3608 $$ = $1; 3609 } 3610 } 3611 ; 3612 3613 xhost : not host { 3614 struct node_host *n; 3615 3616 for (n = $2; n != NULL; n = n->next) 3617 n->not = $1; 3618 $$ = $2; 3619 } 3620 | not NOROUTE { 3621 $$ = calloc(1, sizeof(struct node_host)); 3622 if ($$ == NULL) 3623 err(1, "xhost: calloc"); 3624 $$->addr.type = PF_ADDR_NOROUTE; 3625 $$->next = NULL; 3626 $$->not = $1; 3627 $$->tail = $$; 3628 } 3629 | not URPFFAILED { 3630 $$ = calloc(1, sizeof(struct node_host)); 3631 if ($$ == NULL) 3632 err(1, "xhost: calloc"); 3633 $$->addr.type = PF_ADDR_URPFFAILED; 3634 $$->next = NULL; 3635 $$->not = $1; 3636 $$->tail = $$; 3637 } 3638 ; 3639 3640 host : STRING { 3641 if (($$ = host($1, pf->opts)) == NULL) { 3642 /* error. "any" is handled elsewhere */ 3643 free($1); 3644 yyerror("could not parse host specification"); 3645 YYERROR; 3646 } 3647 free($1); 3648 3649 } 3650 | STRING '-' STRING { 3651 struct node_host *b, *e; 3652 3653 if ((b = host($1, pf->opts)) == NULL || 3654 (e = host($3, pf->opts)) == NULL) { 3655 free($1); 3656 free($3); 3657 yyerror("could not parse host specification"); 3658 YYERROR; 3659 } 3660 if (b->af != e->af || 3661 b->addr.type != PF_ADDR_ADDRMASK || 3662 e->addr.type != PF_ADDR_ADDRMASK || 3663 unmask(&b->addr.v.a.mask) != 3664 (b->af == AF_INET ? 32 : 128) || 3665 unmask(&e->addr.v.a.mask) != 3666 (e->af == AF_INET ? 32 : 128) || 3667 b->next != NULL || b->not || 3668 e->next != NULL || e->not) { 3669 free(b); 3670 free(e); 3671 free($1); 3672 free($3); 3673 yyerror("invalid address range"); 3674 YYERROR; 3675 } 3676 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr, 3677 sizeof(b->addr.v.a.mask)); 3678 b->addr.type = PF_ADDR_RANGE; 3679 $$ = b; 3680 free(e); 3681 free($1); 3682 free($3); 3683 } 3684 | STRING '/' NUMBER { 3685 char *buf; 3686 3687 if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1) 3688 err(1, "host: asprintf"); 3689 free($1); 3690 if (($$ = host(buf, pf->opts)) == NULL) { 3691 /* error. "any" is handled elsewhere */ 3692 free(buf); 3693 yyerror("could not parse host specification"); 3694 YYERROR; 3695 } 3696 free(buf); 3697 } 3698 | NUMBER '/' NUMBER { 3699 char *buf; 3700 3701 /* ie. for 10/8 parsing */ 3702 #ifdef __FreeBSD__ 3703 if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1) 3704 #else 3705 if (asprintf(&buf, "%lld/%lld", $1, $3) == -1) 3706 #endif 3707 err(1, "host: asprintf"); 3708 if (($$ = host(buf, pf->opts)) == NULL) { 3709 /* error. "any" is handled elsewhere */ 3710 free(buf); 3711 yyerror("could not parse host specification"); 3712 YYERROR; 3713 } 3714 free(buf); 3715 } 3716 | dynaddr 3717 | dynaddr '/' NUMBER { 3718 struct node_host *n; 3719 3720 if ($3 < 0 || $3 > 128) { 3721 yyerror("bit number too big"); 3722 YYERROR; 3723 } 3724 $$ = $1; 3725 for (n = $1; n != NULL; n = n->next) 3726 set_ipmask(n, $3); 3727 } 3728 | '<' STRING '>' { 3729 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 3730 yyerror("table name '%s' too long", $2); 3731 free($2); 3732 YYERROR; 3733 } 3734 $$ = calloc(1, sizeof(struct node_host)); 3735 if ($$ == NULL) 3736 err(1, "host: calloc"); 3737 $$->addr.type = PF_ADDR_TABLE; 3738 if (strlcpy($$->addr.v.tblname, $2, 3739 sizeof($$->addr.v.tblname)) >= 3740 sizeof($$->addr.v.tblname)) 3741 errx(1, "host: strlcpy"); 3742 free($2); 3743 $$->next = NULL; 3744 $$->tail = $$; 3745 } 3746 ; 3747 3748 number : NUMBER 3749 | STRING { 3750 u_long ulval; 3751 3752 if (atoul($1, &ulval) == -1) { 3753 yyerror("%s is not a number", $1); 3754 free($1); 3755 YYERROR; 3756 } else 3757 $$ = ulval; 3758 free($1); 3759 } 3760 ; 3761 3762 dynaddr : '(' STRING ')' { 3763 int flags = 0; 3764 char *p, *op; 3765 3766 op = $2; 3767 if (!isalpha(op[0])) { 3768 yyerror("invalid interface name '%s'", op); 3769 free(op); 3770 YYERROR; 3771 } 3772 while ((p = strrchr($2, ':')) != NULL) { 3773 if (!strcmp(p+1, "network")) 3774 flags |= PFI_AFLAG_NETWORK; 3775 else if (!strcmp(p+1, "broadcast")) 3776 flags |= PFI_AFLAG_BROADCAST; 3777 else if (!strcmp(p+1, "peer")) 3778 flags |= PFI_AFLAG_PEER; 3779 else if (!strcmp(p+1, "0")) 3780 flags |= PFI_AFLAG_NOALIAS; 3781 else { 3782 yyerror("interface %s has bad modifier", 3783 $2); 3784 free(op); 3785 YYERROR; 3786 } 3787 *p = '\0'; 3788 } 3789 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { 3790 free(op); 3791 yyerror("illegal combination of " 3792 "interface modifiers"); 3793 YYERROR; 3794 } 3795 $$ = calloc(1, sizeof(struct node_host)); 3796 if ($$ == NULL) 3797 err(1, "address: calloc"); 3798 $$->af = 0; 3799 set_ipmask($$, 128); 3800 $$->addr.type = PF_ADDR_DYNIFTL; 3801 $$->addr.iflags = flags; 3802 if (strlcpy($$->addr.v.ifname, $2, 3803 sizeof($$->addr.v.ifname)) >= 3804 sizeof($$->addr.v.ifname)) { 3805 free(op); 3806 free($$); 3807 yyerror("interface name too long"); 3808 YYERROR; 3809 } 3810 free(op); 3811 $$->next = NULL; 3812 $$->tail = $$; 3813 } 3814 ; 3815 3816 portspec : port_item { $$ = $1; } 3817 | '{' optnl port_list '}' { $$ = $3; } 3818 ; 3819 3820 port_list : port_item optnl { $$ = $1; } 3821 | port_list comma port_item optnl { 3822 $1->tail->next = $3; 3823 $1->tail = $3; 3824 $$ = $1; 3825 } 3826 ; 3827 3828 port_item : portrange { 3829 $$ = calloc(1, sizeof(struct node_port)); 3830 if ($$ == NULL) 3831 err(1, "port_item: calloc"); 3832 $$->port[0] = $1.a; 3833 $$->port[1] = $1.b; 3834 if ($1.t) { 3835 $$->op = PF_OP_RRG; 3836 if (validate_range($$->op, $$->port[0], 3837 $$->port[1])) { 3838 yyerror("invalid port range"); 3839 YYERROR; 3840 } 3841 } else 3842 $$->op = PF_OP_EQ; 3843 $$->next = NULL; 3844 $$->tail = $$; 3845 } 3846 | unaryop portrange { 3847 if ($2.t) { 3848 yyerror("':' cannot be used with an other " 3849 "port operator"); 3850 YYERROR; 3851 } 3852 $$ = calloc(1, sizeof(struct node_port)); 3853 if ($$ == NULL) 3854 err(1, "port_item: calloc"); 3855 $$->port[0] = $2.a; 3856 $$->port[1] = $2.b; 3857 $$->op = $1; 3858 if (validate_range($$->op, $$->port[0], $$->port[1])) { 3859 yyerror("invalid port range"); 3860 YYERROR; 3861 } 3862 $$->next = NULL; 3863 $$->tail = $$; 3864 } 3865 | portrange PORTBINARY portrange { 3866 if ($1.t || $3.t) { 3867 yyerror("':' cannot be used with an other " 3868 "port operator"); 3869 YYERROR; 3870 } 3871 $$ = calloc(1, sizeof(struct node_port)); 3872 if ($$ == NULL) 3873 err(1, "port_item: calloc"); 3874 $$->port[0] = $1.a; 3875 $$->port[1] = $3.a; 3876 $$->op = $2; 3877 if (validate_range($$->op, $$->port[0], $$->port[1])) { 3878 yyerror("invalid port range"); 3879 YYERROR; 3880 } 3881 $$->next = NULL; 3882 $$->tail = $$; 3883 } 3884 ; 3885 3886 portplain : numberstring { 3887 if (parseport($1, &$$, 0) == -1) { 3888 free($1); 3889 YYERROR; 3890 } 3891 free($1); 3892 } 3893 ; 3894 3895 portrange : numberstring { 3896 if (parseport($1, &$$, PPORT_RANGE) == -1) { 3897 free($1); 3898 YYERROR; 3899 } 3900 free($1); 3901 } 3902 ; 3903 3904 uids : uid_item { $$ = $1; } 3905 | '{' optnl uid_list '}' { $$ = $3; } 3906 ; 3907 3908 uid_list : uid_item optnl { $$ = $1; } 3909 | uid_list comma uid_item optnl { 3910 $1->tail->next = $3; 3911 $1->tail = $3; 3912 $$ = $1; 3913 } 3914 ; 3915 3916 uid_item : uid { 3917 $$ = calloc(1, sizeof(struct node_uid)); 3918 if ($$ == NULL) 3919 err(1, "uid_item: calloc"); 3920 $$->uid[0] = $1; 3921 $$->uid[1] = $1; 3922 $$->op = PF_OP_EQ; 3923 $$->next = NULL; 3924 $$->tail = $$; 3925 } 3926 | unaryop uid { 3927 if ($2 == -1 && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 3928 yyerror("user unknown requires operator = or " 3929 "!="); 3930 YYERROR; 3931 } 3932 $$ = calloc(1, sizeof(struct node_uid)); 3933 if ($$ == NULL) 3934 err(1, "uid_item: calloc"); 3935 $$->uid[0] = $2; 3936 $$->uid[1] = $2; 3937 $$->op = $1; 3938 $$->next = NULL; 3939 $$->tail = $$; 3940 } 3941 | uid PORTBINARY uid { 3942 if ($1 == -1 || $3 == -1) { 3943 yyerror("user unknown requires operator = or " 3944 "!="); 3945 YYERROR; 3946 } 3947 $$ = calloc(1, sizeof(struct node_uid)); 3948 if ($$ == NULL) 3949 err(1, "uid_item: calloc"); 3950 $$->uid[0] = $1; 3951 $$->uid[1] = $3; 3952 $$->op = $2; 3953 $$->next = NULL; 3954 $$->tail = $$; 3955 } 3956 ; 3957 3958 uid : STRING { 3959 if (!strcmp($1, "unknown")) 3960 $$ = -1; 3961 else { 3962 uid_t uid; 3963 3964 if (uid_from_user($1, &uid) == -1) { 3965 yyerror("unknown user %s", $1); 3966 free($1); 3967 YYERROR; 3968 } 3969 $$ = uid; 3970 } 3971 free($1); 3972 } 3973 | NUMBER { 3974 if ($1 < 0 || $1 >= UID_MAX) { 3975 yyerror("illegal uid value %lu", $1); 3976 YYERROR; 3977 } 3978 $$ = $1; 3979 } 3980 ; 3981 3982 gids : gid_item { $$ = $1; } 3983 | '{' optnl gid_list '}' { $$ = $3; } 3984 ; 3985 3986 gid_list : gid_item optnl { $$ = $1; } 3987 | gid_list comma gid_item optnl { 3988 $1->tail->next = $3; 3989 $1->tail = $3; 3990 $$ = $1; 3991 } 3992 ; 3993 3994 gid_item : gid { 3995 $$ = calloc(1, sizeof(struct node_gid)); 3996 if ($$ == NULL) 3997 err(1, "gid_item: calloc"); 3998 $$->gid[0] = $1; 3999 $$->gid[1] = $1; 4000 $$->op = PF_OP_EQ; 4001 $$->next = NULL; 4002 $$->tail = $$; 4003 } 4004 | unaryop gid { 4005 if ($2 == -1 && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 4006 yyerror("group unknown requires operator = or " 4007 "!="); 4008 YYERROR; 4009 } 4010 $$ = calloc(1, sizeof(struct node_gid)); 4011 if ($$ == NULL) 4012 err(1, "gid_item: calloc"); 4013 $$->gid[0] = $2; 4014 $$->gid[1] = $2; 4015 $$->op = $1; 4016 $$->next = NULL; 4017 $$->tail = $$; 4018 } 4019 | gid PORTBINARY gid { 4020 if ($1 == -1 || $3 == -1) { 4021 yyerror("group unknown requires operator = or " 4022 "!="); 4023 YYERROR; 4024 } 4025 $$ = calloc(1, sizeof(struct node_gid)); 4026 if ($$ == NULL) 4027 err(1, "gid_item: calloc"); 4028 $$->gid[0] = $1; 4029 $$->gid[1] = $3; 4030 $$->op = $2; 4031 $$->next = NULL; 4032 $$->tail = $$; 4033 } 4034 ; 4035 4036 gid : STRING { 4037 if (!strcmp($1, "unknown")) 4038 $$ = -1; 4039 else { 4040 gid_t gid; 4041 4042 if (gid_from_group($1, &gid) == -1) { 4043 yyerror("unknown group %s", $1); 4044 free($1); 4045 YYERROR; 4046 } 4047 $$ = gid; 4048 } 4049 free($1); 4050 } 4051 | NUMBER { 4052 if ($1 < 0 || $1 >= GID_MAX) { 4053 yyerror("illegal gid value %lu", $1); 4054 YYERROR; 4055 } 4056 $$ = $1; 4057 } 4058 ; 4059 4060 flag : STRING { 4061 int f; 4062 4063 if ((f = parse_flags($1)) < 0) { 4064 yyerror("bad flags %s", $1); 4065 free($1); 4066 YYERROR; 4067 } 4068 free($1); 4069 $$.b1 = f; 4070 } 4071 ; 4072 4073 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 4074 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 4075 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; } 4076 ; 4077 4078 icmpspec : ICMPTYPE icmp_item { $$ = $2; } 4079 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; } 4080 | ICMP6TYPE icmp6_item { $$ = $2; } 4081 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; } 4082 ; 4083 4084 icmp_list : icmp_item optnl { $$ = $1; } 4085 | icmp_list comma icmp_item optnl { 4086 $1->tail->next = $3; 4087 $1->tail = $3; 4088 $$ = $1; 4089 } 4090 ; 4091 4092 icmp6_list : icmp6_item optnl { $$ = $1; } 4093 | icmp6_list comma icmp6_item optnl { 4094 $1->tail->next = $3; 4095 $1->tail = $3; 4096 $$ = $1; 4097 } 4098 ; 4099 4100 icmp_item : icmptype { 4101 $$ = calloc(1, sizeof(struct node_icmp)); 4102 if ($$ == NULL) 4103 err(1, "icmp_item: calloc"); 4104 $$->type = $1; 4105 $$->code = 0; 4106 $$->proto = IPPROTO_ICMP; 4107 $$->next = NULL; 4108 $$->tail = $$; 4109 } 4110 | icmptype CODE STRING { 4111 const struct icmpcodeent *p; 4112 4113 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) { 4114 yyerror("unknown icmp-code %s", $3); 4115 free($3); 4116 YYERROR; 4117 } 4118 4119 free($3); 4120 $$ = calloc(1, sizeof(struct node_icmp)); 4121 if ($$ == NULL) 4122 err(1, "icmp_item: calloc"); 4123 $$->type = $1; 4124 $$->code = p->code + 1; 4125 $$->proto = IPPROTO_ICMP; 4126 $$->next = NULL; 4127 $$->tail = $$; 4128 } 4129 | icmptype CODE NUMBER { 4130 if ($3 < 0 || $3 > 255) { 4131 yyerror("illegal icmp-code %lu", $3); 4132 YYERROR; 4133 } 4134 $$ = calloc(1, sizeof(struct node_icmp)); 4135 if ($$ == NULL) 4136 err(1, "icmp_item: calloc"); 4137 $$->type = $1; 4138 $$->code = $3 + 1; 4139 $$->proto = IPPROTO_ICMP; 4140 $$->next = NULL; 4141 $$->tail = $$; 4142 } 4143 ; 4144 4145 icmp6_item : icmp6type { 4146 $$ = calloc(1, sizeof(struct node_icmp)); 4147 if ($$ == NULL) 4148 err(1, "icmp_item: calloc"); 4149 $$->type = $1; 4150 $$->code = 0; 4151 $$->proto = IPPROTO_ICMPV6; 4152 $$->next = NULL; 4153 $$->tail = $$; 4154 } 4155 | icmp6type CODE STRING { 4156 const struct icmpcodeent *p; 4157 4158 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) { 4159 yyerror("unknown icmp6-code %s", $3); 4160 free($3); 4161 YYERROR; 4162 } 4163 free($3); 4164 4165 $$ = calloc(1, sizeof(struct node_icmp)); 4166 if ($$ == NULL) 4167 err(1, "icmp_item: calloc"); 4168 $$->type = $1; 4169 $$->code = p->code + 1; 4170 $$->proto = IPPROTO_ICMPV6; 4171 $$->next = NULL; 4172 $$->tail = $$; 4173 } 4174 | icmp6type CODE NUMBER { 4175 if ($3 < 0 || $3 > 255) { 4176 yyerror("illegal icmp-code %lu", $3); 4177 YYERROR; 4178 } 4179 $$ = calloc(1, sizeof(struct node_icmp)); 4180 if ($$ == NULL) 4181 err(1, "icmp_item: calloc"); 4182 $$->type = $1; 4183 $$->code = $3 + 1; 4184 $$->proto = IPPROTO_ICMPV6; 4185 $$->next = NULL; 4186 $$->tail = $$; 4187 } 4188 ; 4189 4190 icmptype : STRING { 4191 const struct icmptypeent *p; 4192 4193 if ((p = geticmptypebyname($1, AF_INET)) == NULL) { 4194 yyerror("unknown icmp-type %s", $1); 4195 free($1); 4196 YYERROR; 4197 } 4198 $$ = p->type + 1; 4199 free($1); 4200 } 4201 | NUMBER { 4202 if ($1 < 0 || $1 > 255) { 4203 yyerror("illegal icmp-type %lu", $1); 4204 YYERROR; 4205 } 4206 $$ = $1 + 1; 4207 } 4208 ; 4209 4210 icmp6type : STRING { 4211 const struct icmptypeent *p; 4212 4213 if ((p = geticmptypebyname($1, AF_INET6)) == 4214 NULL) { 4215 yyerror("unknown icmp6-type %s", $1); 4216 free($1); 4217 YYERROR; 4218 } 4219 $$ = p->type + 1; 4220 free($1); 4221 } 4222 | NUMBER { 4223 if ($1 < 0 || $1 > 255) { 4224 yyerror("illegal icmp6-type %lu", $1); 4225 YYERROR; 4226 } 4227 $$ = $1 + 1; 4228 } 4229 ; 4230 4231 tos : STRING { 4232 int val; 4233 char *end; 4234 4235 if (map_tos($1, &val)) 4236 $$ = val; 4237 else if ($1[0] == '0' && $1[1] == 'x') { 4238 errno = 0; 4239 $$ = strtoul($1, &end, 16); 4240 if (errno || *end != '\0') 4241 $$ = 256; 4242 } else 4243 $$ = 256; /* flag bad argument */ 4244 if ($$ < 0 || $$ > 255) { 4245 yyerror("illegal tos value %s", $1); 4246 free($1); 4247 YYERROR; 4248 } 4249 free($1); 4250 } 4251 | NUMBER { 4252 $$ = $1; 4253 if ($$ < 0 || $$ > 255) { 4254 yyerror("illegal tos value %lu", $1); 4255 YYERROR; 4256 } 4257 } 4258 ; 4259 4260 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; } 4261 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; } 4262 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; } 4263 ; 4264 4265 statelock : IFBOUND { 4266 $$ = PFRULE_IFBOUND; 4267 } 4268 | FLOATING { 4269 $$ = 0; 4270 } 4271 ; 4272 4273 keep : NO STATE { 4274 $$.action = 0; 4275 $$.options = NULL; 4276 } 4277 | KEEP STATE state_opt_spec { 4278 $$.action = PF_STATE_NORMAL; 4279 $$.options = $3; 4280 } 4281 | MODULATE STATE state_opt_spec { 4282 $$.action = PF_STATE_MODULATE; 4283 $$.options = $3; 4284 } 4285 | SYNPROXY STATE state_opt_spec { 4286 $$.action = PF_STATE_SYNPROXY; 4287 $$.options = $3; 4288 } 4289 ; 4290 4291 flush : /* empty */ { $$ = 0; } 4292 | FLUSH { $$ = PF_FLUSH; } 4293 | FLUSH GLOBAL { 4294 $$ = PF_FLUSH | PF_FLUSH_GLOBAL; 4295 } 4296 ; 4297 4298 state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 4299 | /* empty */ { $$ = NULL; } 4300 ; 4301 4302 state_opt_list : state_opt_item { $$ = $1; } 4303 | state_opt_list comma state_opt_item { 4304 $1->tail->next = $3; 4305 $1->tail = $3; 4306 $$ = $1; 4307 } 4308 ; 4309 4310 state_opt_item : MAXIMUM NUMBER { 4311 if ($2 < 0 || $2 > UINT_MAX) { 4312 yyerror("only positive values permitted"); 4313 YYERROR; 4314 } 4315 $$ = calloc(1, sizeof(struct node_state_opt)); 4316 if ($$ == NULL) 4317 err(1, "state_opt_item: calloc"); 4318 $$->type = PF_STATE_OPT_MAX; 4319 $$->data.max_states = $2; 4320 $$->next = NULL; 4321 $$->tail = $$; 4322 } 4323 | NOSYNC { 4324 $$ = calloc(1, sizeof(struct node_state_opt)); 4325 if ($$ == NULL) 4326 err(1, "state_opt_item: calloc"); 4327 $$->type = PF_STATE_OPT_NOSYNC; 4328 $$->next = NULL; 4329 $$->tail = $$; 4330 } 4331 | MAXSRCSTATES NUMBER { 4332 if ($2 < 0 || $2 > UINT_MAX) { 4333 yyerror("only positive values permitted"); 4334 YYERROR; 4335 } 4336 $$ = calloc(1, sizeof(struct node_state_opt)); 4337 if ($$ == NULL) 4338 err(1, "state_opt_item: calloc"); 4339 $$->type = PF_STATE_OPT_MAX_SRC_STATES; 4340 $$->data.max_src_states = $2; 4341 $$->next = NULL; 4342 $$->tail = $$; 4343 } 4344 | MAXSRCCONN NUMBER { 4345 if ($2 < 0 || $2 > UINT_MAX) { 4346 yyerror("only positive values permitted"); 4347 YYERROR; 4348 } 4349 $$ = calloc(1, sizeof(struct node_state_opt)); 4350 if ($$ == NULL) 4351 err(1, "state_opt_item: calloc"); 4352 $$->type = PF_STATE_OPT_MAX_SRC_CONN; 4353 $$->data.max_src_conn = $2; 4354 $$->next = NULL; 4355 $$->tail = $$; 4356 } 4357 | MAXSRCCONNRATE NUMBER '/' NUMBER { 4358 if ($2 < 0 || $2 > UINT_MAX || 4359 $4 < 0 || $4 > UINT_MAX) { 4360 yyerror("only positive values permitted"); 4361 YYERROR; 4362 } 4363 $$ = calloc(1, sizeof(struct node_state_opt)); 4364 if ($$ == NULL) 4365 err(1, "state_opt_item: calloc"); 4366 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE; 4367 $$->data.max_src_conn_rate.limit = $2; 4368 $$->data.max_src_conn_rate.seconds = $4; 4369 $$->next = NULL; 4370 $$->tail = $$; 4371 } 4372 | OVERLOAD '<' STRING '>' flush { 4373 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 4374 yyerror("table name '%s' too long", $3); 4375 free($3); 4376 YYERROR; 4377 } 4378 $$ = calloc(1, sizeof(struct node_state_opt)); 4379 if ($$ == NULL) 4380 err(1, "state_opt_item: calloc"); 4381 if (strlcpy($$->data.overload.tblname, $3, 4382 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE) 4383 errx(1, "state_opt_item: strlcpy"); 4384 free($3); 4385 $$->type = PF_STATE_OPT_OVERLOAD; 4386 $$->data.overload.flush = $5; 4387 $$->next = NULL; 4388 $$->tail = $$; 4389 } 4390 | MAXSRCNODES NUMBER { 4391 if ($2 < 0 || $2 > UINT_MAX) { 4392 yyerror("only positive values permitted"); 4393 YYERROR; 4394 } 4395 $$ = calloc(1, sizeof(struct node_state_opt)); 4396 if ($$ == NULL) 4397 err(1, "state_opt_item: calloc"); 4398 $$->type = PF_STATE_OPT_MAX_SRC_NODES; 4399 $$->data.max_src_nodes = $2; 4400 $$->next = NULL; 4401 $$->tail = $$; 4402 } 4403 | sourcetrack { 4404 $$ = calloc(1, sizeof(struct node_state_opt)); 4405 if ($$ == NULL) 4406 err(1, "state_opt_item: calloc"); 4407 $$->type = PF_STATE_OPT_SRCTRACK; 4408 $$->data.src_track = $1; 4409 $$->next = NULL; 4410 $$->tail = $$; 4411 } 4412 | statelock { 4413 $$ = calloc(1, sizeof(struct node_state_opt)); 4414 if ($$ == NULL) 4415 err(1, "state_opt_item: calloc"); 4416 $$->type = PF_STATE_OPT_STATELOCK; 4417 $$->data.statelock = $1; 4418 $$->next = NULL; 4419 $$->tail = $$; 4420 } 4421 | SLOPPY { 4422 $$ = calloc(1, sizeof(struct node_state_opt)); 4423 if ($$ == NULL) 4424 err(1, "state_opt_item: calloc"); 4425 $$->type = PF_STATE_OPT_SLOPPY; 4426 $$->next = NULL; 4427 $$->tail = $$; 4428 } 4429 | PFLOW { 4430 $$ = calloc(1, sizeof(struct node_state_opt)); 4431 if ($$ == NULL) 4432 err(1, "state_opt_item: calloc"); 4433 $$->type = PF_STATE_OPT_PFLOW; 4434 $$->next = NULL; 4435 $$->tail = $$; 4436 } 4437 | ALLOW_RELATED { 4438 $$ = calloc(1, sizeof(struct node_state_opt)); 4439 if ($$ == NULL) 4440 err(1, "state_opt_item: calloc"); 4441 $$->type = PF_STATE_OPT_ALLOW_RELATED; 4442 $$->next = NULL; 4443 $$->tail = $$; 4444 } 4445 | STRING NUMBER { 4446 int i; 4447 4448 if ($2 < 0 || $2 > UINT_MAX) { 4449 yyerror("only positive values permitted"); 4450 YYERROR; 4451 } 4452 for (i = 0; pf_timeouts[i].name && 4453 strcmp(pf_timeouts[i].name, $1); ++i) 4454 ; /* nothing */ 4455 if (!pf_timeouts[i].name) { 4456 yyerror("illegal timeout name %s", $1); 4457 free($1); 4458 YYERROR; 4459 } 4460 if (strchr(pf_timeouts[i].name, '.') == NULL) { 4461 yyerror("illegal state timeout %s", $1); 4462 free($1); 4463 YYERROR; 4464 } 4465 free($1); 4466 $$ = calloc(1, sizeof(struct node_state_opt)); 4467 if ($$ == NULL) 4468 err(1, "state_opt_item: calloc"); 4469 $$->type = PF_STATE_OPT_TIMEOUT; 4470 $$->data.timeout.number = pf_timeouts[i].timeout; 4471 $$->data.timeout.seconds = $2; 4472 $$->next = NULL; 4473 $$->tail = $$; 4474 } 4475 ; 4476 4477 label : LABEL STRING { 4478 $$ = $2; 4479 } 4480 ; 4481 4482 etherqname : QUEUE STRING { 4483 $$.qname = $2; 4484 } 4485 | QUEUE '(' STRING ')' { 4486 $$.qname = $3; 4487 } 4488 ; 4489 4490 qname : QUEUE STRING { 4491 $$.qname = $2; 4492 $$.pqname = NULL; 4493 } 4494 | QUEUE '(' STRING ')' { 4495 $$.qname = $3; 4496 $$.pqname = NULL; 4497 } 4498 | QUEUE '(' STRING comma STRING ')' { 4499 $$.qname = $3; 4500 $$.pqname = $5; 4501 } 4502 ; 4503 4504 no : /* empty */ { $$ = 0; } 4505 | NO { $$ = 1; } 4506 ; 4507 4508 portstar : numberstring { 4509 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) { 4510 free($1); 4511 YYERROR; 4512 } 4513 free($1); 4514 } 4515 ; 4516 4517 redir_host : host { $$ = $1; } 4518 | '{' optnl redir_host_list '}' { $$ = $3; } 4519 ; 4520 4521 redir_host_list : host optnl { $$ = $1; } 4522 | redir_host_list comma host optnl { 4523 $1->tail->next = $3; 4524 $1->tail = $3->tail; 4525 $$ = $1; 4526 } 4527 ; 4528 4529 /* Redirection without port */ 4530 no_port_redirspec: redir_host pool_opts { 4531 $$ = calloc(1, sizeof(struct redirspec)); 4532 if ($$ == NULL) 4533 err(1, "redirspec: calloc"); 4534 $$->host = $1; 4535 $$->pool_opts = $2; 4536 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4537 } 4538 ; 4539 4540 /* Redirection with optional port */ 4541 port_redirspec : no_port_redirspec; 4542 | redir_host PORT portstar pool_opts { 4543 $$ = calloc(1, sizeof(struct redirspec)); 4544 if ($$ == NULL) 4545 err(1, "redirspec: calloc"); 4546 $$->host = $1; 4547 $$->rport = $3; 4548 $$->pool_opts = $4; 4549 } 4550 4551 /* Redirection with an arrow and an optional port: FreeBSD NAT rules */ 4552 nat_redirspec : /* empty */ { $$ = NULL; } 4553 | ARROW port_redirspec { 4554 $$ = $2; 4555 } 4556 ; 4557 4558 /* Redirection with interfaces and without ports: route-to rules */ 4559 route_redirspec : routespec pool_opts { 4560 $$ = calloc(1, sizeof(struct redirspec)); 4561 if ($$ == NULL) 4562 err(1, "redirspec: calloc"); 4563 $$->host = $1; 4564 $$->pool_opts = $2; 4565 } 4566 ; 4567 4568 hashkey : /* empty */ 4569 { 4570 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4571 if ($$ == NULL) 4572 err(1, "hashkey: calloc"); 4573 $$->key32[0] = arc4random(); 4574 $$->key32[1] = arc4random(); 4575 $$->key32[2] = arc4random(); 4576 $$->key32[3] = arc4random(); 4577 } 4578 | string 4579 { 4580 if (!strncmp($1, "0x", 2)) { 4581 if (strlen($1) != 34) { 4582 free($1); 4583 yyerror("hex key must be 128 bits " 4584 "(32 hex digits) long"); 4585 YYERROR; 4586 } 4587 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4588 if ($$ == NULL) 4589 err(1, "hashkey: calloc"); 4590 4591 if (sscanf($1, "0x%8x%8x%8x%8x", 4592 &$$->key32[0], &$$->key32[1], 4593 &$$->key32[2], &$$->key32[3]) != 4) { 4594 free($$); 4595 free($1); 4596 yyerror("invalid hex key"); 4597 YYERROR; 4598 } 4599 } else { 4600 MD5_CTX context; 4601 4602 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 4603 if ($$ == NULL) 4604 err(1, "hashkey: calloc"); 4605 MD5Init(&context); 4606 MD5Update(&context, (unsigned char *)$1, 4607 strlen($1)); 4608 MD5Final((unsigned char *)$$, &context); 4609 HTONL($$->key32[0]); 4610 HTONL($$->key32[1]); 4611 HTONL($$->key32[2]); 4612 HTONL($$->key32[3]); 4613 } 4614 free($1); 4615 } 4616 ; 4617 4618 pool_opts : { bzero(&pool_opts, sizeof pool_opts); } 4619 pool_opts_l 4620 { $$ = pool_opts; } 4621 | /* empty */ { 4622 bzero(&pool_opts, sizeof pool_opts); 4623 $$ = pool_opts; 4624 } 4625 ; 4626 4627 pool_opts_l : pool_opts_l pool_opt 4628 | pool_opt 4629 ; 4630 4631 pool_opt : BITMASK { 4632 if (pool_opts.type) { 4633 yyerror("pool type cannot be redefined"); 4634 YYERROR; 4635 } 4636 pool_opts.type = PF_POOL_BITMASK; 4637 } 4638 | RANDOM { 4639 if (pool_opts.type) { 4640 yyerror("pool type cannot be redefined"); 4641 YYERROR; 4642 } 4643 pool_opts.type = PF_POOL_RANDOM; 4644 } 4645 | SOURCEHASH hashkey { 4646 if (pool_opts.type) { 4647 yyerror("pool type cannot be redefined"); 4648 YYERROR; 4649 } 4650 pool_opts.type = PF_POOL_SRCHASH; 4651 pool_opts.key = $2; 4652 } 4653 | ROUNDROBIN { 4654 if (pool_opts.type) { 4655 yyerror("pool type cannot be redefined"); 4656 YYERROR; 4657 } 4658 pool_opts.type = PF_POOL_ROUNDROBIN; 4659 } 4660 | STATICPORT { 4661 if (pool_opts.staticport) { 4662 yyerror("static-port cannot be redefined"); 4663 YYERROR; 4664 } 4665 pool_opts.staticport = 1; 4666 } 4667 | STICKYADDRESS { 4668 if (pool_opts.marker & POM_STICKYADDRESS) { 4669 yyerror("sticky-address cannot be redefined"); 4670 YYERROR; 4671 } 4672 pool_opts.marker |= POM_STICKYADDRESS; 4673 pool_opts.opts |= PF_POOL_STICKYADDR; 4674 } 4675 | ENDPI { 4676 if (pool_opts.marker & POM_ENDPI) { 4677 yyerror("endpoint-independent cannot be redefined"); 4678 YYERROR; 4679 } 4680 pool_opts.marker |= POM_ENDPI; 4681 pool_opts.opts |= PF_POOL_ENDPI; 4682 } 4683 | IPV6NH { 4684 if (pool_opts.marker & POM_IPV6NH) { 4685 yyerror("prefer-ipv6-nexthop cannot be redefined"); 4686 YYERROR; 4687 } 4688 pool_opts.marker |= POM_IPV6NH; 4689 pool_opts.opts |= PF_POOL_IPV6NH; 4690 } 4691 | MAPEPORTSET number '/' number '/' number { 4692 if (pool_opts.mape.offset) { 4693 yyerror("map-e-portset cannot be redefined"); 4694 YYERROR; 4695 } 4696 if (pool_opts.type) { 4697 yyerror("map-e-portset cannot be used with " 4698 "address pools"); 4699 YYERROR; 4700 } 4701 if ($2 <= 0 || $2 >= 16) { 4702 yyerror("MAP-E PSID offset must be 1-15"); 4703 YYERROR; 4704 } 4705 if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) { 4706 yyerror("Invalid MAP-E PSID length"); 4707 YYERROR; 4708 } else if ($4 == 0) { 4709 yyerror("PSID Length = 0: this means" 4710 " you do not need MAP-E"); 4711 YYERROR; 4712 } 4713 if ($6 < 0 || $6 > 65535) { 4714 yyerror("Invalid MAP-E PSID"); 4715 YYERROR; 4716 } 4717 pool_opts.mape.offset = $2; 4718 pool_opts.mape.psidlen = $4; 4719 pool_opts.mape.psid = $6; 4720 } 4721 ; 4722 4723 binat_redirspec : /* empty */ { $$ = NULL; } 4724 | ARROW host { 4725 $$ = calloc(1, sizeof(struct redirspec)); 4726 if ($$ == NULL) 4727 err(1, "redirspec: calloc"); 4728 $$->host = $2; 4729 $$->rport.a = $$->rport.b = $$->rport.t = 0; 4730 } 4731 | ARROW host PORT portstar { 4732 $$ = calloc(1, sizeof(struct redirspec)); 4733 if ($$ == NULL) 4734 err(1, "redirspec: calloc"); 4735 $$->host = $2; 4736 $$->rport = $4; 4737 } 4738 ; 4739 4740 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; } 4741 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; } 4742 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; } 4743 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; } 4744 ; 4745 4746 nataction : no NAT natpasslog { 4747 if ($1 && $3.b1) { 4748 yyerror("\"pass\" not valid with \"no\""); 4749 YYERROR; 4750 } 4751 if ($1) 4752 $$.b1 = PF_NONAT; 4753 else 4754 $$.b1 = PF_NAT; 4755 $$.b2 = $3.b1; 4756 $$.w = $3.b2; 4757 $$.w2 = $3.w2; 4758 } 4759 | no RDR natpasslog { 4760 if ($1 && $3.b1) { 4761 yyerror("\"pass\" not valid with \"no\""); 4762 YYERROR; 4763 } 4764 if ($1) 4765 $$.b1 = PF_NORDR; 4766 else 4767 $$.b1 = PF_RDR; 4768 $$.b2 = $3.b1; 4769 $$.w = $3.b2; 4770 $$.w2 = $3.w2; 4771 } 4772 ; 4773 4774 natrule : nataction interface af proto fromto tag tagged rtable 4775 nat_redirspec 4776 { 4777 struct pfctl_rule r; 4778 struct node_state_opt *o; 4779 4780 if (check_rulestate(PFCTL_STATE_NAT)) 4781 YYERROR; 4782 4783 pfctl_init_rule(&r); 4784 4785 r.action = $1.b1; 4786 r.natpass = $1.b2; 4787 r.log = $1.w; 4788 r.logif = $1.w2; 4789 r.af = $3; 4790 4791 if (!r.af) { 4792 if ($5.src.host && $5.src.host->af && 4793 !$5.src.host->ifindex) 4794 r.af = $5.src.host->af; 4795 else if ($5.dst.host && $5.dst.host->af && 4796 !$5.dst.host->ifindex) 4797 r.af = $5.dst.host->af; 4798 } 4799 4800 if ($6 != NULL) 4801 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >= 4802 PF_TAG_NAME_SIZE) { 4803 yyerror("tag too long, max %u chars", 4804 PF_TAG_NAME_SIZE - 1); 4805 YYERROR; 4806 } 4807 4808 if ($7.name) 4809 if (strlcpy(r.match_tagname, $7.name, 4810 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4811 yyerror("tag too long, max %u chars", 4812 PF_TAG_NAME_SIZE - 1); 4813 YYERROR; 4814 } 4815 r.match_tag_not = $7.neg; 4816 r.rtableid = $8; 4817 4818 if (r.action == PF_NONAT || r.action == PF_NORDR) { 4819 if ($9 != NULL) { 4820 yyerror("translation rule with 'no' " 4821 "does not need '->'"); 4822 YYERROR; 4823 } 4824 } else { 4825 if ($9 == NULL || $9->host == NULL) { 4826 yyerror("translation rule requires '-> " 4827 "address'"); 4828 YYERROR; 4829 } 4830 if ($9->pool_opts.opts & PF_POOL_IPV6NH) { 4831 yyerror("The prefer-ipv6-nexthop option " 4832 "can't be used for nat/rdr/binat pools" 4833 ); 4834 YYERROR; 4835 } 4836 if (!r.af && ! $9->host->ifindex) 4837 r.af = $9->host->af; 4838 4839 remove_invalid_hosts(&$9->host, &r.af); 4840 if (invalid_redirect($9->host, r.af)) 4841 YYERROR; 4842 if ($9->host->addr.type == PF_ADDR_DYNIFTL) { 4843 if (($9->host = gen_dynnode($9->host, r.af)) == NULL) 4844 err(1, "calloc"); 4845 } 4846 if (check_netmask($9->host, r.af)) 4847 YYERROR; 4848 } 4849 4850 o = keep_state_defaults; 4851 while (o) { 4852 switch (o->type) { 4853 case PF_STATE_OPT_PFLOW: 4854 if (r.rule_flag & PFRULE_PFLOW) { 4855 yyerror("state pflow option: " 4856 "multiple definitions"); 4857 YYERROR; 4858 } 4859 r.rule_flag |= PFRULE_PFLOW; 4860 break; 4861 } 4862 o = o->next; 4863 } 4864 4865 expand_rule(&r, false, $2, NULL, $9, NULL, $4, 4866 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 4867 $5.dst.port, 0, 0, 0, 0, ""); 4868 } 4869 ; 4870 4871 binatrule : no BINAT natpasslog interface af proto FROM ipspec toipspec tag 4872 tagged rtable binat_redirspec 4873 { 4874 struct pfctl_rule binat; 4875 struct pfctl_pooladdr *pa; 4876 4877 if (check_rulestate(PFCTL_STATE_NAT)) 4878 YYERROR; 4879 if (disallow_urpf_failed($9, "\"urpf-failed\" is not " 4880 "permitted as a binat destination")) 4881 YYERROR; 4882 4883 pfctl_init_rule(&binat); 4884 4885 if ($1 && $3.b1) { 4886 yyerror("\"pass\" not valid with \"no\""); 4887 YYERROR; 4888 } 4889 if ($1) 4890 binat.action = PF_NOBINAT; 4891 else 4892 binat.action = PF_BINAT; 4893 binat.natpass = $3.b1; 4894 binat.log = $3.b2; 4895 binat.logif = $3.w2; 4896 binat.af = $5; 4897 if (!binat.af && $8 != NULL && $8->af) 4898 binat.af = $8->af; 4899 if (!binat.af && $9 != NULL && $9->af) 4900 binat.af = $9->af; 4901 4902 if (!binat.af && $13 != NULL && $13->host) 4903 binat.af = $13->host->af; 4904 if (!binat.af) { 4905 yyerror("address family (inet/inet6) " 4906 "undefined"); 4907 YYERROR; 4908 } 4909 4910 if ($4 != NULL) { 4911 memcpy(binat.ifname, $4->ifname, 4912 sizeof(binat.ifname)); 4913 binat.ifnot = $4->not; 4914 free($4); 4915 } 4916 4917 if ($10 != NULL) 4918 if (strlcpy(binat.tagname, $10, 4919 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4920 yyerror("tag too long, max %u chars", 4921 PF_TAG_NAME_SIZE - 1); 4922 YYERROR; 4923 } 4924 if ($11.name) 4925 if (strlcpy(binat.match_tagname, $11.name, 4926 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 4927 yyerror("tag too long, max %u chars", 4928 PF_TAG_NAME_SIZE - 1); 4929 YYERROR; 4930 } 4931 binat.match_tag_not = $11.neg; 4932 binat.rtableid = $12; 4933 4934 if ($6 != NULL) { 4935 binat.proto = $6->proto; 4936 free($6); 4937 } 4938 4939 if ($8 != NULL && disallow_table($8, "invalid use of " 4940 "table <%s> as the source address of a binat rule")) 4941 YYERROR; 4942 if ($8 != NULL && disallow_alias($8, "invalid use of " 4943 "interface (%s) as the source address of a binat " 4944 "rule")) 4945 YYERROR; 4946 if ($13 != NULL && $13->host != NULL && disallow_table( 4947 $13->host, "invalid use of table <%s> as the " 4948 "redirect address of a binat rule")) 4949 YYERROR; 4950 if ($13 != NULL && $13->host != NULL && disallow_alias( 4951 $13->host, "invalid use of interface (%s) as the " 4952 "redirect address of a binat rule")) 4953 YYERROR; 4954 4955 if ($8 != NULL) { 4956 if ($8->next) { 4957 yyerror("multiple binat ip addresses"); 4958 YYERROR; 4959 } 4960 if ($8->addr.type == PF_ADDR_DYNIFTL) 4961 $8->af = binat.af; 4962 if ($8->af != binat.af) { 4963 yyerror("binat ip versions must match"); 4964 YYERROR; 4965 } 4966 if ($8->addr.type == PF_ADDR_DYNIFTL) { 4967 if (($8 = gen_dynnode($8, binat.af)) == NULL) 4968 err(1, "calloc"); 4969 } 4970 if (check_netmask($8, binat.af)) 4971 YYERROR; 4972 memcpy(&binat.src.addr, &$8->addr, 4973 sizeof(binat.src.addr)); 4974 free($8); 4975 } 4976 if ($9 != NULL) { 4977 if ($9->next) { 4978 yyerror("multiple binat ip addresses"); 4979 YYERROR; 4980 } 4981 if ($9->af != binat.af && $9->af) { 4982 yyerror("binat ip versions must match"); 4983 YYERROR; 4984 } 4985 if ($9->addr.type == PF_ADDR_DYNIFTL) { 4986 if (($9 = gen_dynnode($9, binat.af)) == NULL) 4987 err(1, "calloc"); 4988 } 4989 if (check_netmask($9, binat.af)) 4990 YYERROR; 4991 memcpy(&binat.dst.addr, &$9->addr, 4992 sizeof(binat.dst.addr)); 4993 binat.dst.neg = $9->not; 4994 free($9); 4995 } 4996 4997 if (binat.action == PF_NOBINAT) { 4998 if ($13 != NULL) { 4999 yyerror("'no binat' rule does not need" 5000 " '->'"); 5001 YYERROR; 5002 } 5003 } else { 5004 if ($13 == NULL || $13->host == NULL) { 5005 yyerror("'binat' rule requires" 5006 " '-> address'"); 5007 YYERROR; 5008 } 5009 5010 remove_invalid_hosts(&$13->host, &binat.af); 5011 if (invalid_redirect($13->host, binat.af)) 5012 YYERROR; 5013 if ($13->host->next != NULL) { 5014 yyerror("binat rule must redirect to " 5015 "a single address"); 5016 YYERROR; 5017 } 5018 if ($13->host->addr.type == PF_ADDR_DYNIFTL) { 5019 if (($13->host = gen_dynnode($13->host, binat.af)) == NULL) 5020 err(1, "calloc"); 5021 } 5022 if (check_netmask($13->host, binat.af)) 5023 YYERROR; 5024 5025 if (!PF_AZERO(&binat.src.addr.v.a.mask, 5026 binat.af) && 5027 !PF_AEQ(&binat.src.addr.v.a.mask, 5028 &$13->host->addr.v.a.mask, binat.af)) { 5029 yyerror("'binat' source mask and " 5030 "redirect mask must be the same"); 5031 YYERROR; 5032 } 5033 5034 pa = calloc(1, sizeof(struct pfctl_pooladdr)); 5035 if (pa == NULL) 5036 err(1, "binat: calloc"); 5037 pa->addr = $13->host->addr; 5038 pa->ifname[0] = 0; 5039 pa->af = $13->host->af; 5040 TAILQ_INSERT_TAIL(&binat.rdr.list, 5041 pa, entries); 5042 5043 free($13); 5044 } 5045 5046 pfctl_append_rule(pf, &binat, ""); 5047 } 5048 ; 5049 5050 tag : /* empty */ { $$ = NULL; } 5051 | TAG STRING { $$ = $2; } 5052 ; 5053 5054 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; } 5055 | not TAGGED string { $$.neg = $1; $$.name = $3; } 5056 ; 5057 5058 rtable : /* empty */ { $$ = -1; } 5059 | RTABLE NUMBER { 5060 if ($2 < 0 || $2 > rt_tableid_max()) { 5061 yyerror("invalid rtable id"); 5062 YYERROR; 5063 } 5064 $$ = $2; 5065 } 5066 ; 5067 5068 route_host : STRING { 5069 $$ = calloc(1, sizeof(struct node_host)); 5070 if ($$ == NULL) 5071 err(1, "route_host: calloc"); 5072 if (strlen($1) >= IFNAMSIZ) { 5073 yyerror("interface name too long"); 5074 YYERROR; 5075 } 5076 $$->ifname = strdup($1); 5077 set_ipmask($$, 128); 5078 $$->next = NULL; 5079 $$->tail = $$; 5080 } 5081 | '(' STRING host ')' { 5082 struct node_host *n; 5083 5084 $$ = $3; 5085 for (n = $3; n != NULL; n = n->next) { 5086 if (strlen($2) >= IFNAMSIZ) { 5087 yyerror("interface name too long"); 5088 YYERROR; 5089 } 5090 n->ifname = strdup($2); 5091 } 5092 } 5093 ; 5094 5095 route_host_list : route_host optnl { $$ = $1; } 5096 | route_host_list comma route_host optnl { 5097 $1->tail->next = $3; 5098 $1->tail = $3->tail; 5099 $$ = $1; 5100 } 5101 ; 5102 5103 routespec : route_host { $$ = $1; } 5104 | '{' optnl route_host_list '}' { $$ = $3; } 5105 ; 5106 5107 route : /* empty */ { 5108 $$.rt = PF_NOPFROUTE; 5109 } 5110 | FASTROUTE { 5111 /* backwards-compat */ 5112 $$.rt = PF_NOPFROUTE; 5113 } 5114 | ROUTETO route_redirspec { 5115 $$.rt = PF_ROUTETO; 5116 $$.redirspec = $2; 5117 } 5118 | REPLYTO route_redirspec { 5119 $$.rt = PF_REPLYTO; 5120 $$.redirspec = $2; 5121 } 5122 | DUPTO route_redirspec { 5123 $$.rt = PF_DUPTO; 5124 $$.redirspec = $2; 5125 } 5126 ; 5127 5128 timeout_spec : STRING NUMBER 5129 { 5130 if (check_rulestate(PFCTL_STATE_OPTION)) { 5131 free($1); 5132 YYERROR; 5133 } 5134 if ($2 < 0 || $2 > UINT_MAX) { 5135 yyerror("only positive values permitted"); 5136 YYERROR; 5137 } 5138 if (pfctl_apply_timeout(pf, $1, $2, 0) != 0) { 5139 yyerror("unknown timeout %s", $1); 5140 free($1); 5141 YYERROR; 5142 } 5143 free($1); 5144 } 5145 | INTERVAL NUMBER { 5146 if (check_rulestate(PFCTL_STATE_OPTION)) 5147 YYERROR; 5148 if ($2 < 0 || $2 > UINT_MAX) { 5149 yyerror("only positive values permitted"); 5150 YYERROR; 5151 } 5152 if (pfctl_apply_timeout(pf, "interval", $2, 0) != 0) 5153 YYERROR; 5154 } 5155 ; 5156 5157 timeout_list : timeout_list comma timeout_spec optnl 5158 | timeout_spec optnl 5159 ; 5160 5161 limit_spec : STRING NUMBER 5162 { 5163 if (check_rulestate(PFCTL_STATE_OPTION)) { 5164 free($1); 5165 YYERROR; 5166 } 5167 if ($2 < 0 || $2 > UINT_MAX) { 5168 yyerror("only positive values permitted"); 5169 YYERROR; 5170 } 5171 if (pfctl_apply_limit(pf, $1, $2) != 0) { 5172 yyerror("unable to set limit %s %u", $1, $2); 5173 free($1); 5174 YYERROR; 5175 } 5176 free($1); 5177 } 5178 ; 5179 5180 limit_list : limit_list comma limit_spec optnl 5181 | limit_spec optnl 5182 ; 5183 5184 comma : ',' 5185 | /* empty */ 5186 ; 5187 5188 yesno : NO { $$ = 0; } 5189 | STRING { 5190 if (!strcmp($1, "yes")) 5191 $$ = 1; 5192 else { 5193 yyerror("invalid value '%s', expected 'yes' " 5194 "or 'no'", $1); 5195 free($1); 5196 YYERROR; 5197 } 5198 free($1); 5199 } 5200 ; 5201 5202 unaryop : '=' { $$ = PF_OP_EQ; } 5203 | NE { $$ = PF_OP_NE; } 5204 | LE { $$ = PF_OP_LE; } 5205 | '<' { $$ = PF_OP_LT; } 5206 | GE { $$ = PF_OP_GE; } 5207 | '>' { $$ = PF_OP_GT; } 5208 ; 5209 5210 %% 5211 5212 int 5213 yyerror(const char *fmt, ...) 5214 { 5215 va_list ap; 5216 5217 file->errors++; 5218 va_start(ap, fmt); 5219 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno); 5220 vfprintf(stderr, fmt, ap); 5221 fprintf(stderr, "\n"); 5222 va_end(ap); 5223 return (0); 5224 } 5225 5226 int 5227 validate_range(uint8_t op, uint16_t p1, uint16_t p2) 5228 { 5229 uint16_t a = ntohs(p1); 5230 uint16_t b = ntohs(p2); 5231 5232 if ((op == PF_OP_RRG && a > b) || /* 34:12, i.e. none */ 5233 (op == PF_OP_IRG && a >= b) || /* 34><12, i.e. none */ 5234 (op == PF_OP_XRG && a > b)) /* 34<>22, i.e. all */ 5235 return 1; 5236 return 0; 5237 } 5238 5239 int 5240 disallow_table(struct node_host *h, const char *fmt) 5241 { 5242 for (; h != NULL; h = h->next) 5243 if (h->addr.type == PF_ADDR_TABLE) { 5244 yyerror(fmt, h->addr.v.tblname); 5245 return (1); 5246 } 5247 return (0); 5248 } 5249 5250 int 5251 disallow_urpf_failed(struct node_host *h, const char *fmt) 5252 { 5253 for (; h != NULL; h = h->next) 5254 if (h->addr.type == PF_ADDR_URPFFAILED) { 5255 yyerror(fmt); 5256 return (1); 5257 } 5258 return (0); 5259 } 5260 5261 int 5262 disallow_alias(struct node_host *h, const char *fmt) 5263 { 5264 for (; h != NULL; h = h->next) 5265 if (DYNIF_MULTIADDR(h->addr)) { 5266 yyerror(fmt, h->addr.v.tblname); 5267 return (1); 5268 } 5269 return (0); 5270 } 5271 5272 int 5273 rule_consistent(struct pfctl_rule *r, int anchor_call) 5274 { 5275 int problems = 0; 5276 5277 switch (r->action) { 5278 case PF_PASS: 5279 case PF_MATCH: 5280 case PF_DROP: 5281 case PF_SCRUB: 5282 case PF_NOSCRUB: 5283 problems = filter_consistent(r, anchor_call); 5284 break; 5285 case PF_NAT: 5286 case PF_NONAT: 5287 problems = nat_consistent(r); 5288 break; 5289 case PF_RDR: 5290 case PF_NORDR: 5291 problems = rdr_consistent(r); 5292 break; 5293 case PF_BINAT: 5294 case PF_NOBINAT: 5295 default: 5296 break; 5297 } 5298 return (problems); 5299 } 5300 5301 int 5302 filter_consistent(struct pfctl_rule *r, int anchor_call) 5303 { 5304 int problems = 0; 5305 5306 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 5307 r->proto != IPPROTO_SCTP && 5308 (r->src.port_op || r->dst.port_op)) { 5309 yyerror("port only applies to tcp/udp/sctp"); 5310 problems++; 5311 } 5312 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 5313 (r->type || r->code)) { 5314 yyerror("icmp-type/code only applies to icmp"); 5315 problems++; 5316 } 5317 if (!r->af && (r->type || r->code)) { 5318 yyerror("must indicate address family with icmp-type/code"); 5319 problems++; 5320 } 5321 if (r->rule_flag & PFRULE_AFTO && r->af == r->naf) { 5322 yyerror("must indicate different address family with af-to"); 5323 problems++; 5324 } 5325 if (r->overload_tblname[0] && 5326 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) { 5327 yyerror("'overload' requires 'max-src-conn' " 5328 "or 'max-src-conn-rate'"); 5329 problems++; 5330 } 5331 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 5332 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 5333 yyerror("proto %s doesn't match address family %s", 5334 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 5335 r->af == AF_INET ? "inet" : "inet6"); 5336 problems++; 5337 } 5338 if (r->allow_opts && r->action != PF_PASS && r->action != PF_MATCH) { 5339 yyerror("allow-opts can only be specified for pass or " 5340 "match rules"); 5341 problems++; 5342 } 5343 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 5344 r->dst.port_op || r->flagset || r->type || r->code)) { 5345 yyerror("fragments can be filtered only on IP header fields"); 5346 problems++; 5347 } 5348 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 5349 yyerror("return-rst can only be applied to TCP rules"); 5350 problems++; 5351 } 5352 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) { 5353 yyerror("max-src-nodes requires 'source-track rule'"); 5354 problems++; 5355 } 5356 if (r->action != PF_PASS && r->keep_state) { 5357 yyerror("keep state is great, but only for pass rules"); 5358 problems++; 5359 } 5360 if (r->rule_flag & PFRULE_STATESLOPPY && 5361 (r->keep_state == PF_STATE_MODULATE || 5362 r->keep_state == PF_STATE_SYNPROXY)) { 5363 yyerror("sloppy state matching cannot be used with " 5364 "synproxy state or modulate state"); 5365 problems++; 5366 } 5367 if ((r->keep_state == PF_STATE_SYNPROXY) && (r->direction != PF_IN)) 5368 fprintf(stderr, "%s:%d: warning: " 5369 "synproxy used for inbound rules only, " 5370 "ignored for outbound\n", file->name, yylval.lineno); 5371 if (r->rule_flag & PFRULE_AFTO && r->rt) { 5372 if (r->rt != PF_ROUTETO && r->rt != PF_REPLYTO) { 5373 yyerror("dup-to " 5374 "must not be used on af-to rules"); 5375 problems++; 5376 } 5377 } 5378 /* Basic rule sanity check. */ 5379 switch (r->action) { 5380 case PF_MATCH: 5381 if (r->divert.port) { 5382 yyerror("divert is not supported on match rules"); 5383 problems++; 5384 } 5385 if (r->rt) { 5386 yyerror("route-to, reply-to, dup-to and fastroute " 5387 "must not be used on match rules"); 5388 problems++; 5389 } 5390 if (r->rule_flag & PFRULE_AFTO) { 5391 yyerror("af-to is not supported on match rules"); 5392 problems++; 5393 } 5394 break; 5395 case PF_DROP: 5396 if (r->rt) { 5397 yyerror("route-to, reply-to and dup-to " 5398 "are not supported on block rules"); 5399 problems++; 5400 } 5401 break; 5402 default:; 5403 } 5404 if (!TAILQ_EMPTY(&(r->nat.list)) || !TAILQ_EMPTY(&(r->rdr.list))) { 5405 if (r->action != PF_MATCH && !r->keep_state) { 5406 yyerror("nat-to and rdr-to require keep state"); 5407 problems++; 5408 } 5409 if (r->direction == PF_INOUT) { 5410 yyerror("nat-to and rdr-to require a direction"); 5411 problems++; 5412 } 5413 } 5414 if (r->route.opts & PF_POOL_STICKYADDR && !r->keep_state) { 5415 yyerror("'sticky-address' requires 'keep state'"); 5416 } 5417 return (-problems); 5418 } 5419 5420 int 5421 nat_consistent(struct pfctl_rule *r) 5422 { 5423 return (0); /* yeah! */ 5424 } 5425 5426 int 5427 rdr_consistent(struct pfctl_rule *r) 5428 { 5429 int problems = 0; 5430 5431 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 5432 r->proto != IPPROTO_SCTP) { 5433 if (r->src.port_op) { 5434 yyerror("src port only applies to tcp/udp/sctp"); 5435 problems++; 5436 } 5437 if (r->dst.port_op) { 5438 yyerror("dst port only applies to tcp/udp/sctp"); 5439 problems++; 5440 } 5441 if (r->rdr.proxy_port[0]) { 5442 yyerror("rdr port only applies to tcp/udp/sctp"); 5443 problems++; 5444 } 5445 } 5446 if (r->dst.port_op && 5447 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 5448 yyerror("invalid port operator for rdr destination port"); 5449 problems++; 5450 } 5451 return (-problems); 5452 } 5453 5454 int 5455 process_tabledef(char *name, struct table_opts *opts, int popts) 5456 { 5457 struct pfr_buffer ab; 5458 struct node_tinit *ti; 5459 unsigned long maxcount; 5460 size_t s = sizeof(maxcount); 5461 5462 bzero(&ab, sizeof(ab)); 5463 ab.pfrb_type = PFRB_ADDRS; 5464 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 5465 if (ti->file) 5466 if (pfr_buf_load(&ab, ti->file, 0, append_addr, popts)) { 5467 if (errno) 5468 yyerror("cannot load \"%s\": %s", 5469 ti->file, strerror(errno)); 5470 else 5471 yyerror("file \"%s\" contains bad data", 5472 ti->file); 5473 goto _error; 5474 } 5475 if (ti->host) 5476 if (append_addr_host(&ab, ti->host, 0, 0)) { 5477 yyerror("cannot create address buffer: %s", 5478 strerror(errno)); 5479 goto _error; 5480 } 5481 } 5482 if (pf->opts & PF_OPT_VERBOSE) 5483 print_tabledef(name, opts->flags, opts->init_addr, 5484 &opts->init_nodes); 5485 if (!(pf->opts & PF_OPT_NOACTION) || 5486 (pf->opts & PF_OPT_DUMMYACTION)) 5487 warn_duplicate_tables(name, pf->anchor->path); 5488 else if (pf->opts & PF_OPT_VERBOSE) 5489 fprintf(stderr, "%s:%d: skipping duplicate table checks" 5490 " for <%s>\n", file->name, yylval.lineno, name); 5491 if (!(pf->opts & PF_OPT_NOACTION) && 5492 pfctl_define_table(name, opts->flags, opts->init_addr, 5493 pf->anchor->path, &ab, pf->anchor->ruleset.tticket)) { 5494 5495 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s, 5496 NULL, 0) == -1) 5497 maxcount = 65535; 5498 5499 if (ab.pfrb_size > maxcount) 5500 yyerror("cannot define table %s: too many elements.\n" 5501 "Consider increasing net.pf.request_maxcount.", 5502 name); 5503 else 5504 yyerror("cannot define table %s: %s", name, 5505 pf_strerror(errno)); 5506 5507 goto _error; 5508 } 5509 pf->tdirty = 1; 5510 pfr_buf_clear(&ab); 5511 return (0); 5512 _error: 5513 pfr_buf_clear(&ab); 5514 return (-1); 5515 } 5516 5517 struct keywords { 5518 const char *k_name; 5519 int k_val; 5520 }; 5521 5522 /* macro gore, but you should've seen the prior indentation nightmare... */ 5523 5524 #define FREE_LIST(T,r) \ 5525 do { \ 5526 T *p, *node = r; \ 5527 while (node != NULL) { \ 5528 p = node; \ 5529 node = node->next; \ 5530 free(p); \ 5531 } \ 5532 } while (0) 5533 5534 #define LOOP_THROUGH(T,n,r,C) \ 5535 do { \ 5536 T *n; \ 5537 if (r == NULL) { \ 5538 r = calloc(1, sizeof(T)); \ 5539 if (r == NULL) \ 5540 err(1, "LOOP: calloc"); \ 5541 r->next = NULL; \ 5542 } \ 5543 n = r; \ 5544 while (n != NULL) { \ 5545 do { \ 5546 C; \ 5547 } while (0); \ 5548 n = n->next; \ 5549 } \ 5550 } while (0) 5551 5552 void 5553 expand_label_str(char *label, size_t len, const char *srch, const char *repl) 5554 { 5555 char *tmp; 5556 char *p, *q; 5557 5558 if ((tmp = calloc(1, len)) == NULL) 5559 err(1, "%s: calloc", __func__); 5560 p = q = label; 5561 while ((q = strstr(p, srch)) != NULL) { 5562 *q = '\0'; 5563 if ((strlcat(tmp, p, len) >= len) || 5564 (strlcat(tmp, repl, len) >= len)) 5565 errx(1, "%s: label too long", __func__); 5566 q += strlen(srch); 5567 p = q; 5568 } 5569 if (strlcat(tmp, p, len) >= len) 5570 errx(1, "%s: label too long", __func__); 5571 strlcpy(label, tmp, len); /* always fits */ 5572 free(tmp); 5573 } 5574 5575 void 5576 expand_label_if(const char *name, char *label, size_t len, const char *ifname) 5577 { 5578 if (strstr(label, name) != NULL) { 5579 if (!*ifname) 5580 expand_label_str(label, len, name, "any"); 5581 else 5582 expand_label_str(label, len, name, ifname); 5583 } 5584 } 5585 5586 void 5587 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af, 5588 struct pf_rule_addr *addr) 5589 { 5590 char tmp[64], tmp_not[66]; 5591 5592 if (strstr(label, name) != NULL) { 5593 switch (addr->addr.type) { 5594 case PF_ADDR_DYNIFTL: 5595 snprintf(tmp, sizeof(tmp), "(%s)", addr->addr.v.ifname); 5596 break; 5597 case PF_ADDR_TABLE: 5598 snprintf(tmp, sizeof(tmp), "<%s>", addr->addr.v.tblname); 5599 break; 5600 case PF_ADDR_NOROUTE: 5601 snprintf(tmp, sizeof(tmp), "no-route"); 5602 break; 5603 case PF_ADDR_URPFFAILED: 5604 snprintf(tmp, sizeof(tmp), "urpf-failed"); 5605 break; 5606 case PF_ADDR_ADDRMASK: 5607 if (!af || (PF_AZERO(&addr->addr.v.a.addr, af) && 5608 PF_AZERO(&addr->addr.v.a.mask, af))) 5609 snprintf(tmp, sizeof(tmp), "any"); 5610 else { 5611 char a[48]; 5612 int bits; 5613 5614 if (inet_ntop(af, &addr->addr.v.a.addr, a, 5615 sizeof(a)) == NULL) 5616 snprintf(tmp, sizeof(tmp), "?"); 5617 else { 5618 bits = unmask(&addr->addr.v.a.mask); 5619 if ((af == AF_INET && bits < 32) || 5620 (af == AF_INET6 && bits < 128)) 5621 snprintf(tmp, sizeof(tmp), 5622 "%s/%d", a, bits); 5623 else 5624 snprintf(tmp, sizeof(tmp), 5625 "%s", a); 5626 } 5627 } 5628 break; 5629 default: 5630 snprintf(tmp, sizeof(tmp), "?"); 5631 break; 5632 } 5633 5634 if (addr->neg) { 5635 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 5636 expand_label_str(label, len, name, tmp_not); 5637 } else 5638 expand_label_str(label, len, name, tmp); 5639 } 5640 } 5641 5642 void 5643 expand_label_port(const char *name, char *label, size_t len, 5644 struct pf_rule_addr *addr) 5645 { 5646 char a1[6], a2[6], op[13] = ""; 5647 5648 if (strstr(label, name) != NULL) { 5649 snprintf(a1, sizeof(a1), "%u", ntohs(addr->port[0])); 5650 snprintf(a2, sizeof(a2), "%u", ntohs(addr->port[1])); 5651 if (!addr->port_op) 5652 ; 5653 else if (addr->port_op == PF_OP_IRG) 5654 snprintf(op, sizeof(op), "%s><%s", a1, a2); 5655 else if (addr->port_op == PF_OP_XRG) 5656 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 5657 else if (addr->port_op == PF_OP_EQ) 5658 snprintf(op, sizeof(op), "%s", a1); 5659 else if (addr->port_op == PF_OP_NE) 5660 snprintf(op, sizeof(op), "!=%s", a1); 5661 else if (addr->port_op == PF_OP_LT) 5662 snprintf(op, sizeof(op), "<%s", a1); 5663 else if (addr->port_op == PF_OP_LE) 5664 snprintf(op, sizeof(op), "<=%s", a1); 5665 else if (addr->port_op == PF_OP_GT) 5666 snprintf(op, sizeof(op), ">%s", a1); 5667 else if (addr->port_op == PF_OP_GE) 5668 snprintf(op, sizeof(op), ">=%s", a1); 5669 expand_label_str(label, len, name, op); 5670 } 5671 } 5672 5673 void 5674 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto) 5675 { 5676 const char *protoname; 5677 char n[4]; 5678 5679 if (strstr(label, name) != NULL) { 5680 protoname = pfctl_proto2name(proto); 5681 if (protoname != NULL) 5682 expand_label_str(label, len, name, protoname); 5683 else { 5684 snprintf(n, sizeof(n), "%u", proto); 5685 expand_label_str(label, len, name, n); 5686 } 5687 } 5688 } 5689 5690 void 5691 expand_label_nr(const char *name, char *label, size_t len, 5692 struct pfctl_rule *r) 5693 { 5694 char n[11]; 5695 5696 if (strstr(label, name) != NULL) { 5697 snprintf(n, sizeof(n), "%u", r->nr); 5698 expand_label_str(label, len, name, n); 5699 } 5700 } 5701 5702 void 5703 expand_label(char *label, size_t len, struct pfctl_rule *r) 5704 { 5705 expand_label_if("$if", label, len, r->ifname); 5706 expand_label_addr("$srcaddr", label, len, r->af, &r->src); 5707 expand_label_addr("$dstaddr", label, len, r->af, &r->dst); 5708 expand_label_port("$srcport", label, len, &r->src); 5709 expand_label_port("$dstport", label, len, &r->dst); 5710 expand_label_proto("$proto", label, len, r->proto); 5711 expand_label_nr("$nr", label, len, r); 5712 } 5713 5714 int 5715 expand_altq(struct pf_altq *a, struct node_if *interfaces, 5716 struct node_queue *nqueues, struct node_queue_bw bwspec, 5717 struct node_queue_opt *opts) 5718 { 5719 struct pf_altq pa, pb; 5720 char qname[PF_QNAME_SIZE]; 5721 struct node_queue *n; 5722 struct node_queue_bw bw; 5723 int errs = 0; 5724 5725 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5726 FREE_LIST(struct node_if, interfaces); 5727 if (nqueues) 5728 FREE_LIST(struct node_queue, nqueues); 5729 return (0); 5730 } 5731 5732 LOOP_THROUGH(struct node_if, interface, interfaces, 5733 memcpy(&pa, a, sizeof(struct pf_altq)); 5734 if (strlcpy(pa.ifname, interface->ifname, 5735 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5736 errx(1, "%s: strlcpy", __func__); 5737 5738 if (interface->not) { 5739 yyerror("altq on ! <interface> is not supported"); 5740 errs++; 5741 } else { 5742 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 5743 errs++; 5744 else 5745 if (pfctl_add_altq(pf, &pa)) 5746 errs++; 5747 5748 if (pf->opts & PF_OPT_VERBOSE) { 5749 print_altq(&pf->paltq->altq, 0, 5750 &bwspec, opts); 5751 if (nqueues && nqueues->tail) { 5752 printf("queue { "); 5753 LOOP_THROUGH(struct node_queue, queue, 5754 nqueues, 5755 printf("%s ", 5756 queue->queue); 5757 ); 5758 printf("}"); 5759 } 5760 printf("\n"); 5761 } 5762 5763 if (pa.scheduler == ALTQT_CBQ || 5764 pa.scheduler == ALTQT_HFSC || 5765 pa.scheduler == ALTQT_FAIRQ) { 5766 /* now create a root queue */ 5767 memset(&pb, 0, sizeof(struct pf_altq)); 5768 if (strlcpy(qname, "root_", sizeof(qname)) >= 5769 sizeof(qname)) 5770 errx(1, "%s: strlcpy", __func__); 5771 if (strlcat(qname, interface->ifname, 5772 sizeof(qname)) >= sizeof(qname)) 5773 errx(1, "%s: strlcat", __func__); 5774 if (strlcpy(pb.qname, qname, 5775 sizeof(pb.qname)) >= sizeof(pb.qname)) 5776 errx(1, "%s: strlcpy", __func__); 5777 if (strlcpy(pb.ifname, interface->ifname, 5778 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 5779 errx(1, "%s: strlcpy", __func__); 5780 pb.qlimit = pa.qlimit; 5781 pb.scheduler = pa.scheduler; 5782 bw.bw_absolute = pa.ifbandwidth; 5783 bw.bw_percent = 0; 5784 if (eval_pfqueue(pf, &pb, &bw, opts)) 5785 errs++; 5786 else 5787 if (pfctl_add_altq(pf, &pb)) 5788 errs++; 5789 } 5790 5791 LOOP_THROUGH(struct node_queue, queue, nqueues, 5792 n = calloc(1, sizeof(struct node_queue)); 5793 if (n == NULL) 5794 err(1, "%s: calloc", __func__); 5795 if (pa.scheduler == ALTQT_CBQ || 5796 pa.scheduler == ALTQT_HFSC || 5797 pa.scheduler == ALTQT_FAIRQ) 5798 if (strlcpy(n->parent, qname, 5799 sizeof(n->parent)) >= 5800 sizeof(n->parent)) 5801 errx(1, "%s: strlcpy", __func__); 5802 if (strlcpy(n->queue, queue->queue, 5803 sizeof(n->queue)) >= sizeof(n->queue)) 5804 errx(1, "%s: strlcpy", __func__); 5805 if (strlcpy(n->ifname, interface->ifname, 5806 sizeof(n->ifname)) >= sizeof(n->ifname)) 5807 errx(1, "%s: strlcpy", __func__); 5808 n->scheduler = pa.scheduler; 5809 n->next = NULL; 5810 n->tail = n; 5811 if (queues == NULL) 5812 queues = n; 5813 else { 5814 queues->tail->next = n; 5815 queues->tail = n; 5816 } 5817 ); 5818 } 5819 ); 5820 FREE_LIST(struct node_if, interfaces); 5821 if (nqueues) 5822 FREE_LIST(struct node_queue, nqueues); 5823 5824 return (errs); 5825 } 5826 5827 int 5828 expand_queue(struct pf_altq *a, struct node_if *interfaces, 5829 struct node_queue *nqueues, struct node_queue_bw bwspec, 5830 struct node_queue_opt *opts) 5831 { 5832 struct node_queue *n, *nq; 5833 struct pf_altq pa; 5834 u_int8_t found = 0; 5835 u_int8_t errs = 0; 5836 5837 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 5838 FREE_LIST(struct node_queue, nqueues); 5839 return (0); 5840 } 5841 5842 if (queues == NULL) { 5843 yyerror("queue %s has no parent", a->qname); 5844 FREE_LIST(struct node_queue, nqueues); 5845 return (1); 5846 } 5847 5848 LOOP_THROUGH(struct node_if, interface, interfaces, 5849 LOOP_THROUGH(struct node_queue, tqueue, queues, 5850 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 5851 (interface->ifname[0] == 0 || 5852 (!interface->not && !strncmp(interface->ifname, 5853 tqueue->ifname, IFNAMSIZ)) || 5854 (interface->not && strncmp(interface->ifname, 5855 tqueue->ifname, IFNAMSIZ)))) { 5856 /* found ourself in queues */ 5857 found++; 5858 5859 memcpy(&pa, a, sizeof(struct pf_altq)); 5860 5861 if (pa.scheduler != ALTQT_NONE && 5862 pa.scheduler != tqueue->scheduler) { 5863 yyerror("exactly one scheduler type " 5864 "per interface allowed"); 5865 return (1); 5866 } 5867 pa.scheduler = tqueue->scheduler; 5868 5869 /* scheduler dependent error checking */ 5870 switch (pa.scheduler) { 5871 case ALTQT_PRIQ: 5872 if (nqueues != NULL) { 5873 yyerror("priq queues cannot " 5874 "have child queues"); 5875 return (1); 5876 } 5877 if (bwspec.bw_absolute > 0 || 5878 bwspec.bw_percent < 100) { 5879 yyerror("priq doesn't take " 5880 "bandwidth"); 5881 return (1); 5882 } 5883 break; 5884 default: 5885 break; 5886 } 5887 5888 if (strlcpy(pa.ifname, tqueue->ifname, 5889 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 5890 errx(1, "%s: strlcpy", __func__); 5891 if (strlcpy(pa.parent, tqueue->parent, 5892 sizeof(pa.parent)) >= sizeof(pa.parent)) 5893 errx(1, "%s: strlcpy", __func__); 5894 5895 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 5896 errs++; 5897 else 5898 if (pfctl_add_altq(pf, &pa)) 5899 errs++; 5900 5901 for (nq = nqueues; nq != NULL; nq = nq->next) { 5902 if (!strcmp(a->qname, nq->queue)) { 5903 yyerror("queue cannot have " 5904 "itself as child"); 5905 errs++; 5906 continue; 5907 } 5908 n = calloc(1, 5909 sizeof(struct node_queue)); 5910 if (n == NULL) 5911 err(1, "%s: calloc", __func__); 5912 if (strlcpy(n->parent, a->qname, 5913 sizeof(n->parent)) >= 5914 sizeof(n->parent)) 5915 errx(1, "%s strlcpy", __func__); 5916 if (strlcpy(n->queue, nq->queue, 5917 sizeof(n->queue)) >= 5918 sizeof(n->queue)) 5919 errx(1, "%s strlcpy", __func__); 5920 if (strlcpy(n->ifname, tqueue->ifname, 5921 sizeof(n->ifname)) >= 5922 sizeof(n->ifname)) 5923 errx(1, "%s strlcpy", __func__); 5924 n->scheduler = tqueue->scheduler; 5925 n->next = NULL; 5926 n->tail = n; 5927 if (queues == NULL) 5928 queues = n; 5929 else { 5930 queues->tail->next = n; 5931 queues->tail = n; 5932 } 5933 } 5934 if ((pf->opts & PF_OPT_VERBOSE) && ( 5935 (found == 1 && interface->ifname[0] == 0) || 5936 (found > 0 && interface->ifname[0] != 0))) { 5937 print_queue(&pf->paltq->altq, 0, 5938 &bwspec, interface->ifname[0] != 0, 5939 opts); 5940 if (nqueues && nqueues->tail) { 5941 printf("{ "); 5942 LOOP_THROUGH(struct node_queue, 5943 queue, nqueues, 5944 printf("%s ", 5945 queue->queue); 5946 ); 5947 printf("}"); 5948 } 5949 printf("\n"); 5950 } 5951 } 5952 ); 5953 ); 5954 5955 FREE_LIST(struct node_queue, nqueues); 5956 FREE_LIST(struct node_if, interfaces); 5957 5958 if (!found) { 5959 yyerror("queue %s has no parent", a->qname); 5960 errs++; 5961 } 5962 5963 if (errs) 5964 return (1); 5965 else 5966 return (0); 5967 } 5968 5969 static int 5970 pf_af_to_proto(sa_family_t af) 5971 { 5972 if (af == AF_INET) 5973 return (ETHERTYPE_IP); 5974 if (af == AF_INET6) 5975 return (ETHERTYPE_IPV6); 5976 5977 return (0); 5978 } 5979 5980 void 5981 expand_eth_rule(struct pfctl_eth_rule *r, 5982 struct node_if *interfaces, struct node_etherproto *protos, 5983 struct node_mac *srcs, struct node_mac *dsts, 5984 struct node_host *ipsrcs, struct node_host *ipdsts, 5985 const char *bridge_to, const char *anchor_call) 5986 { 5987 char tagname[PF_TAG_NAME_SIZE]; 5988 char match_tagname[PF_TAG_NAME_SIZE]; 5989 char qname[PF_QNAME_SIZE]; 5990 5991 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 5992 errx(1, "%s: tagname", __func__); 5993 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 5994 sizeof(match_tagname)) 5995 errx(1, "%s: match_tagname", __func__); 5996 if (strlcpy(qname, r->qname, sizeof(qname)) >= sizeof(qname)) 5997 errx(1, "%s: qname", __func__); 5998 5999 LOOP_THROUGH(struct node_if, interface, interfaces, 6000 LOOP_THROUGH(struct node_etherproto, proto, protos, 6001 LOOP_THROUGH(struct node_mac, src, srcs, 6002 LOOP_THROUGH(struct node_mac, dst, dsts, 6003 LOOP_THROUGH(struct node_host, ipsrc, ipsrcs, 6004 LOOP_THROUGH(struct node_host, ipdst, ipdsts, 6005 strlcpy(r->ifname, interface->ifname, 6006 sizeof(r->ifname)); 6007 r->ifnot = interface->not; 6008 r->proto = proto->proto; 6009 if (!r->proto && ipsrc->af) 6010 r->proto = pf_af_to_proto(ipsrc->af); 6011 else if (!r->proto && ipdst->af) 6012 r->proto = pf_af_to_proto(ipdst->af); 6013 bcopy(src->mac, r->src.addr, ETHER_ADDR_LEN); 6014 bcopy(src->mask, r->src.mask, ETHER_ADDR_LEN); 6015 r->src.neg = src->neg; 6016 r->src.isset = src->isset; 6017 r->ipsrc.addr = ipsrc->addr; 6018 r->ipsrc.neg = ipsrc->not; 6019 r->ipdst.addr = ipdst->addr; 6020 r->ipdst.neg = ipdst->not; 6021 bcopy(dst->mac, r->dst.addr, ETHER_ADDR_LEN); 6022 bcopy(dst->mask, r->dst.mask, ETHER_ADDR_LEN); 6023 r->dst.neg = dst->neg; 6024 r->dst.isset = dst->isset; 6025 r->nr = pf->eastack[pf->asd]->match++; 6026 6027 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 6028 sizeof(r->tagname)) 6029 errx(1, "%s: r->tagname", __func__); 6030 if (strlcpy(r->match_tagname, match_tagname, 6031 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 6032 errx(1, "%s: r->match_tagname", __func__); 6033 if (strlcpy(r->qname, qname, sizeof(r->qname)) >= sizeof(r->qname)) 6034 errx(1, "%s: r->qname", __func__); 6035 6036 if (bridge_to) 6037 strlcpy(r->bridge_to, bridge_to, sizeof(r->bridge_to)); 6038 6039 pfctl_append_eth_rule(pf, r, anchor_call); 6040 )))))); 6041 6042 FREE_LIST(struct node_if, interfaces); 6043 FREE_LIST(struct node_etherproto, protos); 6044 FREE_LIST(struct node_mac, srcs); 6045 FREE_LIST(struct node_mac, dsts); 6046 FREE_LIST(struct node_host, ipsrcs); 6047 FREE_LIST(struct node_host, ipdsts); 6048 } 6049 6050 int 6051 apply_rdr_ports(struct pfctl_rule *r, 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 6058 if (!rs->rport.b && rs->rport.t) { 6059 rpool->proxy_port[1] = ntohs(rs->rport.a) + 6060 (ntohs(r->dst.port[1]) - ntohs(r->dst.port[0])); 6061 } else { 6062 if (validate_range(rs->rport.t, rs->rport.a, 6063 rs->rport.b)) { 6064 yyerror("invalid rdr-to port range"); 6065 return (1); 6066 } 6067 r->rdr.proxy_port[1] = ntohs(rs->rport.b); 6068 } 6069 6070 if (rs->pool_opts.staticport) { 6071 yyerror("the 'static-port' option is only valid with nat rules"); 6072 return 1; 6073 } 6074 6075 if (rs->pool_opts.mape.offset) { 6076 yyerror("the 'map-e-portset' option is only valid with nat rules"); 6077 return 1; 6078 } 6079 6080 return 0; 6081 } 6082 6083 int 6084 apply_nat_ports(struct pfctl_pool *rpool, struct redirspec *rs) 6085 { 6086 if (rs == NULL) 6087 return 0; 6088 6089 rpool->proxy_port[0] = ntohs(rs->rport.a); 6090 rpool->proxy_port[1] = ntohs(rs->rport.b); 6091 if (!rpool->proxy_port[0] && !rpool->proxy_port[1]) { 6092 rpool->proxy_port[0] = PF_NAT_PROXY_PORT_LOW; 6093 rpool->proxy_port[1] = PF_NAT_PROXY_PORT_HIGH; 6094 } else if (!rpool->proxy_port[1]) 6095 rpool->proxy_port[1] = rpool->proxy_port[0]; 6096 6097 if (rs->pool_opts.staticport) { 6098 if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW && 6099 rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) { 6100 yyerror("the 'static-port' option can't" 6101 " be used when specifying a port" 6102 " range"); 6103 return 1; 6104 } 6105 rpool->proxy_port[0] = 0; 6106 rpool->proxy_port[1] = 0; 6107 } 6108 6109 if (rs->pool_opts.mape.offset) { 6110 if (rs->pool_opts.staticport) { 6111 yyerror("the 'map-e-portset' option" 6112 " can't be used 'static-port'"); 6113 return 1; 6114 } 6115 if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW && 6116 rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) { 6117 yyerror("the 'map-e-portset' option" 6118 " can't be used when specifying" 6119 " a port range"); 6120 return 1; 6121 } 6122 rpool->mape = rs->pool_opts.mape; 6123 } 6124 6125 return 0; 6126 } 6127 6128 int 6129 apply_redirspec(struct pfctl_pool *rpool, struct redirspec *rs) 6130 { 6131 struct node_host *h; 6132 struct pfctl_pooladdr *pa; 6133 6134 if (rs == NULL) 6135 return 0; 6136 6137 rpool->opts = rs->pool_opts.type; 6138 6139 if ((rpool->opts & PF_POOL_TYPEMASK) == PF_POOL_NONE && 6140 (rs->host->next != NULL || 6141 rs->host->addr.type == PF_ADDR_TABLE || 6142 DYNIF_MULTIADDR(rs->host->addr))) 6143 rpool->opts = PF_POOL_ROUNDROBIN; 6144 6145 if (!PF_POOL_DYNTYPE(rpool->opts) && 6146 (disallow_table(rs->host, "tables are not supported by pool type") || 6147 disallow_alias(rs->host, "interface (%s) is not supported by pool type"))) 6148 return 1; 6149 6150 if (rs->host->next != NULL && 6151 ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN)) { 6152 yyerror("r.route.opts must be PF_POOL_ROUNDROBIN"); 6153 return 1; 6154 } 6155 6156 if (rs->host->next != NULL) { 6157 if ((rpool->opts & PF_POOL_TYPEMASK) != 6158 PF_POOL_ROUNDROBIN) { 6159 yyerror("only round-robin valid for multiple " 6160 "redirection addresses"); 6161 return 1; 6162 } 6163 } 6164 6165 rpool->opts |= rs->pool_opts.opts; 6166 6167 if (rs->pool_opts.key != NULL) 6168 memcpy(&(rpool->key), rs->pool_opts.key, 6169 sizeof(struct pf_poolhashkey)); 6170 6171 for (h = rs->host; h != NULL; h = h->next) { 6172 pa = calloc(1, sizeof(struct pfctl_pooladdr)); 6173 if (pa == NULL) 6174 err(1, "%s: calloc", __func__); 6175 pa->addr = h->addr; 6176 pa->af = h->af; 6177 if (h->ifname != NULL) { 6178 if (strlcpy(pa->ifname, h->ifname, 6179 sizeof(pa->ifname)) >= sizeof(pa->ifname)) 6180 errx(1, "%s: strlcpy", __func__); 6181 } else 6182 pa->ifname[0] = 0; 6183 TAILQ_INSERT_TAIL(&(rpool->list), pa, entries); 6184 } 6185 6186 return 0; 6187 } 6188 6189 int 6190 check_binat_redirspec(struct node_host *src_host, struct pfctl_rule *r, 6191 sa_family_t af) 6192 { 6193 struct pfctl_pooladdr *nat_pool = TAILQ_FIRST(&(r->nat.list)); 6194 int error = 0; 6195 6196 /* XXX: FreeBSD allows syntax like "{ host1 host2 }" for redirection 6197 * pools but does not covert them to tables automatically, because 6198 * syntax "{ (iface1 host1), (iface2 iface2) }" is allowed for route-to 6199 * redirection. Add a FreeBSD-specific guard against using multiple 6200 * hosts for source and redirection. 6201 */ 6202 if (src_host->next) { 6203 yyerror("invalid use of table as the source address " 6204 "of a binat-to rule"); 6205 error++; 6206 } 6207 if (TAILQ_NEXT(nat_pool, entries)) { 6208 yyerror ("tables cannot be used as the redirect " 6209 "address of a binat-to rule"); 6210 error++; 6211 } 6212 6213 if (disallow_table(src_host, "invalid use of table " 6214 "<%s> as the source address of a binat-to rule") || 6215 disallow_alias(src_host, "invalid use of interface " 6216 "(%s) as the source address of a binat-to rule")) { 6217 error++; 6218 } else if ((r->src.addr.type != PF_ADDR_ADDRMASK && 6219 r->src.addr.type != PF_ADDR_DYNIFTL) || 6220 (nat_pool->addr.type != PF_ADDR_ADDRMASK && 6221 nat_pool->addr.type != PF_ADDR_DYNIFTL)) { 6222 yyerror("binat-to requires a specified " 6223 "source and redirect address"); 6224 error++; 6225 } 6226 if (DYNIF_MULTIADDR(r->src.addr) || 6227 DYNIF_MULTIADDR(nat_pool->addr)) { 6228 yyerror ("dynamic interfaces must be " 6229 "used with:0 in a binat-to rule"); 6230 error++; 6231 } 6232 if (PF_AZERO(&r->src.addr.v.a.mask, af) || 6233 PF_AZERO(&(nat_pool->addr.v.a.mask), af)) { 6234 yyerror ("source and redir addresess must have " 6235 "a matching network mask in binat-rule"); 6236 error++; 6237 } 6238 if (nat_pool->addr.type == PF_ADDR_TABLE) { 6239 yyerror ("tables cannot be used as the redirect " 6240 "address of a binat-to rule"); 6241 error++; 6242 } 6243 if (r->direction != PF_INOUT) { 6244 yyerror("binat-to cannot be specified " 6245 "with a direction"); 6246 error++; 6247 } 6248 6249 /* first specify outbound NAT rule */ 6250 r->direction = PF_OUT; 6251 6252 return (error); 6253 } 6254 6255 void 6256 add_binat_rdr_rule( 6257 struct pfctl_rule *binat_rule, 6258 struct redirspec *binat_nat_redirspec, struct node_host *binat_src_host, 6259 struct pfctl_rule *rdr_rule, struct redirspec **rdr_redirspec, 6260 struct node_host **rdr_dst_host) 6261 { 6262 struct node_host *rdr_src_host; 6263 6264 /* 6265 * We're copying the whole rule, but we must re-init redir pools. 6266 * FreeBSD uses lists of pfctl_pooladdr, we can't just overwrite them. 6267 */ 6268 bcopy(binat_rule, rdr_rule, sizeof(struct pfctl_rule)); 6269 TAILQ_INIT(&(rdr_rule->rdr.list)); 6270 TAILQ_INIT(&(rdr_rule->nat.list)); 6271 6272 /* now specify inbound rdr rule */ 6273 rdr_rule->direction = PF_IN; 6274 6275 if ((rdr_src_host = calloc(1, sizeof(*rdr_src_host))) == NULL) 6276 err(1, "%s", __func__); 6277 bcopy(binat_src_host, rdr_src_host, sizeof(*rdr_src_host)); 6278 rdr_src_host->ifname = NULL; 6279 rdr_src_host->next = NULL; 6280 rdr_src_host->tail = NULL; 6281 6282 if (((*rdr_dst_host) = calloc(1, sizeof(**rdr_dst_host))) == NULL) 6283 err(1, "%s", __func__); 6284 bcopy(&(binat_nat_redirspec->host->addr), &((*rdr_dst_host)->addr), 6285 sizeof((*rdr_dst_host)->addr)); 6286 (*rdr_dst_host)->ifname = NULL; 6287 (*rdr_dst_host)->next = NULL; 6288 (*rdr_dst_host)->tail = NULL; 6289 6290 if (((*rdr_redirspec) = calloc(1, sizeof(**rdr_redirspec))) == NULL) 6291 err(1, "%s", __func__); 6292 bcopy(binat_nat_redirspec, (*rdr_redirspec), sizeof(**rdr_redirspec)); 6293 (*rdr_redirspec)->pool_opts.staticport = 0; 6294 (*rdr_redirspec)->host = rdr_src_host; 6295 } 6296 6297 void 6298 expand_rule(struct pfctl_rule *r, bool keeprule, 6299 struct node_if *interfaces, struct redirspec *nat, 6300 struct redirspec *rdr, struct redirspec *route, 6301 struct node_proto *protos, 6302 struct node_os *src_oses, struct node_host *src_hosts, 6303 struct node_port *src_ports, struct node_host *dst_hosts, 6304 struct node_port *dst_ports, struct node_uid *uids, struct node_gid *gids, 6305 struct node_if *rcv, struct node_icmp *icmp_types, const char *anchor_call) 6306 { 6307 sa_family_t af = r->af; 6308 int added = 0, error = 0; 6309 char ifname[IF_NAMESIZE]; 6310 char label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE]; 6311 char tagname[PF_TAG_NAME_SIZE]; 6312 char match_tagname[PF_TAG_NAME_SIZE]; 6313 struct node_host *osrch, *odsth; 6314 u_int8_t flags, flagset, keep_state; 6315 6316 memcpy(label, r->label, sizeof(r->label)); 6317 assert(sizeof(r->label) == sizeof(label)); 6318 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname)) 6319 errx(1, "%s: strlcpy", __func__); 6320 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >= 6321 sizeof(match_tagname)) 6322 errx(1, "%s: strlcpy", __func__); 6323 flags = r->flags; 6324 flagset = r->flagset; 6325 keep_state = r->keep_state; 6326 6327 LOOP_THROUGH(struct node_if, interface, interfaces, 6328 LOOP_THROUGH(struct node_proto, proto, protos, 6329 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 6330 LOOP_THROUGH(struct node_host, src_host, src_hosts, 6331 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 6332 LOOP_THROUGH(struct node_port, src_port, src_ports, 6333 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 6334 LOOP_THROUGH(struct node_os, src_os, src_oses, 6335 LOOP_THROUGH(struct node_uid, uid, uids, 6336 LOOP_THROUGH(struct node_gid, gid, gids, 6337 6338 r->af = af; 6339 6340 if (r->rule_flag & PFRULE_AFTO) { 6341 assert(nat != NULL); 6342 r->naf = nat->af; 6343 } 6344 6345 /* for link-local IPv6 address, interface must match up */ 6346 if ((r->af && src_host->af && r->af != src_host->af) || 6347 (r->af && dst_host->af && r->af != dst_host->af) || 6348 (src_host->af && dst_host->af && 6349 src_host->af != dst_host->af) || 6350 (src_host->ifindex && dst_host->ifindex && 6351 src_host->ifindex != dst_host->ifindex) || 6352 (src_host->ifindex && *interface->ifname && 6353 src_host->ifindex != ifa_nametoindex(interface->ifname)) || 6354 (dst_host->ifindex && *interface->ifname && 6355 dst_host->ifindex != ifa_nametoindex(interface->ifname))) 6356 continue; 6357 if (!r->af && src_host->af) 6358 r->af = src_host->af; 6359 else if (!r->af && dst_host->af) 6360 r->af = dst_host->af; 6361 6362 if (*interface->ifname) 6363 strlcpy(r->ifname, interface->ifname, 6364 sizeof(r->ifname)); 6365 else if (ifa_indextoname(src_host->ifindex, ifname)) 6366 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 6367 else if (ifa_indextoname(dst_host->ifindex, ifname)) 6368 strlcpy(r->ifname, ifname, sizeof(r->ifname)); 6369 else 6370 memset(r->ifname, '\0', sizeof(r->ifname)); 6371 6372 memcpy(r->label, label, sizeof(r->label)); 6373 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >= 6374 sizeof(r->tagname)) 6375 errx(1, "%s: strlcpy", __func__); 6376 if (strlcpy(r->match_tagname, match_tagname, 6377 sizeof(r->match_tagname)) >= sizeof(r->match_tagname)) 6378 errx(1, "%s: strlcpy", __func__); 6379 6380 osrch = odsth = NULL; 6381 if (src_host->addr.type == PF_ADDR_DYNIFTL) { 6382 osrch = src_host; 6383 if ((src_host = gen_dynnode(src_host, r->af)) == NULL) 6384 err(1, "%s: calloc", __func__); 6385 } 6386 if (dst_host->addr.type == PF_ADDR_DYNIFTL) { 6387 odsth = dst_host; 6388 if ((dst_host = gen_dynnode(dst_host, r->af)) == NULL) 6389 err(1, "%s: calloc", __func__); 6390 } 6391 6392 error += check_netmask(src_host, r->af); 6393 error += check_netmask(dst_host, r->af); 6394 6395 r->ifnot = interface->not; 6396 r->proto = proto->proto; 6397 r->src.addr = src_host->addr; 6398 r->src.neg = src_host->not; 6399 r->src.port[0] = src_port->port[0]; 6400 r->src.port[1] = src_port->port[1]; 6401 r->src.port_op = src_port->op; 6402 r->dst.addr = dst_host->addr; 6403 r->dst.neg = dst_host->not; 6404 r->dst.port[0] = dst_port->port[0]; 6405 r->dst.port[1] = dst_port->port[1]; 6406 r->dst.port_op = dst_port->op; 6407 r->uid.op = uid->op; 6408 r->uid.uid[0] = uid->uid[0]; 6409 r->uid.uid[1] = uid->uid[1]; 6410 r->gid.op = gid->op; 6411 r->gid.gid[0] = gid->gid[0]; 6412 r->gid.gid[1] = gid->gid[1]; 6413 if (rcv) { 6414 strlcpy(r->rcv_ifname, rcv->ifname, 6415 sizeof(r->rcv_ifname)); 6416 r->rcvifnot = rcv->not; 6417 } 6418 r->type = icmp_type->type; 6419 r->code = icmp_type->code; 6420 6421 if ((keep_state == PF_STATE_MODULATE || 6422 keep_state == PF_STATE_SYNPROXY) && 6423 r->proto && r->proto != IPPROTO_TCP) 6424 r->keep_state = PF_STATE_NORMAL; 6425 else 6426 r->keep_state = keep_state; 6427 6428 if (r->proto && r->proto != IPPROTO_TCP) { 6429 r->flags = 0; 6430 r->flagset = 0; 6431 } else { 6432 r->flags = flags; 6433 r->flagset = flagset; 6434 } 6435 if (icmp_type->proto && r->proto != icmp_type->proto) { 6436 yyerror("icmp-type mismatch"); 6437 error++; 6438 } 6439 6440 if (src_os && src_os->os) { 6441 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 6442 if ((pf->opts & PF_OPT_VERBOSE2) && 6443 r->os_fingerprint == PF_OSFP_NOMATCH) 6444 fprintf(stderr, 6445 "warning: unknown '%s' OS fingerprint\n", 6446 src_os->os); 6447 } else { 6448 r->os_fingerprint = PF_OSFP_ANY; 6449 } 6450 6451 if (r->action == PF_RDR) { 6452 /* Pre-FreeBSD 15 "rdr" rule */ 6453 error += apply_rdr_ports(r, &(r->rdr), rdr); 6454 error += apply_redirspec(&(r->rdr), rdr); 6455 } else if (r->action == PF_NAT) { 6456 /* Pre-FreeBSD 15 "nat" rule */ 6457 error += apply_nat_ports(&(r->rdr), rdr); 6458 error += apply_redirspec(&(r->rdr), rdr); 6459 } else { 6460 /* Modern rule with optional NAT, BINAT, RDR or ROUTE*/ 6461 error += apply_redirspec(&(r->route), route); 6462 6463 error += apply_nat_ports(&(r->nat), nat); 6464 error += apply_redirspec(&(r->nat), nat); 6465 error += apply_rdr_ports(r, &(r->rdr), rdr); 6466 error += apply_redirspec(&(r->rdr), rdr); 6467 6468 if (nat && nat->binat) 6469 error += check_binat_redirspec(src_host, r, af); 6470 } 6471 6472 if (rule_consistent(r, anchor_call[0]) < 0 || error) 6473 yyerror("skipping rule due to errors"); 6474 else { 6475 r->nr = pf->astack[pf->asd]->match++; 6476 pfctl_append_rule(pf, r, anchor_call); 6477 added++; 6478 } 6479 6480 /* Generate binat's matching inbound rule */ 6481 if (!error && nat && nat->binat) { 6482 struct pfctl_rule rdr_rule; 6483 struct redirspec *rdr_redirspec; 6484 struct node_host *rdr_dst_host; 6485 6486 add_binat_rdr_rule( 6487 r, nat, src_hosts, 6488 &rdr_rule, &rdr_redirspec, &rdr_dst_host); 6489 6490 expand_rule(&rdr_rule, true, interface, NULL, rdr_redirspec, 6491 NULL, proto, src_os, dst_host, dst_port, 6492 rdr_dst_host, src_port, uid, gid, rcv, icmp_type, 6493 ""); 6494 } 6495 6496 if (osrch && src_host->addr.type == PF_ADDR_DYNIFTL) { 6497 free(src_host); 6498 src_host = osrch; 6499 } 6500 if (odsth && dst_host->addr.type == PF_ADDR_DYNIFTL) { 6501 free(dst_host); 6502 dst_host = odsth; 6503 } 6504 6505 )))))))))); 6506 6507 if (!keeprule) { 6508 FREE_LIST(struct node_if, interfaces); 6509 FREE_LIST(struct node_proto, protos); 6510 FREE_LIST(struct node_host, src_hosts); 6511 FREE_LIST(struct node_port, src_ports); 6512 FREE_LIST(struct node_os, src_oses); 6513 FREE_LIST(struct node_host, dst_hosts); 6514 FREE_LIST(struct node_port, dst_ports); 6515 FREE_LIST(struct node_uid, uids); 6516 FREE_LIST(struct node_gid, gids); 6517 FREE_LIST(struct node_icmp, icmp_types); 6518 if (nat) { 6519 FREE_LIST(struct node_host, nat->host); 6520 free(nat); 6521 } 6522 if (rdr) { 6523 FREE_LIST(struct node_host, rdr->host); 6524 free(rdr); 6525 } 6526 if (route) { 6527 FREE_LIST(struct node_host, route->host); 6528 free(route); 6529 } 6530 } 6531 6532 if (!added) 6533 yyerror("rule expands to no valid combination"); 6534 } 6535 6536 int 6537 expand_skip_interface(struct node_if *interfaces) 6538 { 6539 int errs = 0; 6540 6541 if (!interfaces || (!interfaces->next && !interfaces->not && 6542 !strcmp(interfaces->ifname, "none"))) { 6543 if (pf->opts & PF_OPT_VERBOSE) 6544 printf("set skip on none\n"); 6545 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0); 6546 return (errs); 6547 } 6548 6549 if (pf->opts & PF_OPT_VERBOSE) 6550 printf("set skip on {"); 6551 LOOP_THROUGH(struct node_if, interface, interfaces, 6552 if (pf->opts & PF_OPT_VERBOSE) 6553 printf(" %s", interface->ifname); 6554 if (interface->not) { 6555 yyerror("skip on ! <interface> is not supported"); 6556 errs++; 6557 } else 6558 errs += pfctl_set_interface_flags(pf, 6559 interface->ifname, PFI_IFLAG_SKIP, 1); 6560 ); 6561 if (pf->opts & PF_OPT_VERBOSE) 6562 printf(" }\n"); 6563 6564 FREE_LIST(struct node_if, interfaces); 6565 6566 if (errs) 6567 return (1); 6568 else 6569 return (0); 6570 } 6571 6572 void 6573 freehostlist(struct node_host *h) 6574 { 6575 FREE_LIST(struct node_host, h); 6576 } 6577 6578 #undef FREE_LIST 6579 #undef LOOP_THROUGH 6580 6581 int 6582 check_rulestate(int desired_state) 6583 { 6584 if (require_order && (rulestate > desired_state)) { 6585 yyerror("Rules must be in order: options, ethernet, " 6586 "normalization, queueing, translation, filtering"); 6587 return (1); 6588 } 6589 rulestate = desired_state; 6590 return (0); 6591 } 6592 6593 int 6594 kw_cmp(const void *k, const void *e) 6595 { 6596 return (strcmp(k, ((const struct keywords *)e)->k_name)); 6597 } 6598 6599 int 6600 lookup(char *s) 6601 { 6602 /* this has to be sorted always */ 6603 static const struct keywords keywords[] = { 6604 { "af-to", AFTO}, 6605 { "all", ALL}, 6606 { "allow-opts", ALLOWOPTS}, 6607 { "allow-related", ALLOW_RELATED}, 6608 { "altq", ALTQ}, 6609 { "anchor", ANCHOR}, 6610 { "antispoof", ANTISPOOF}, 6611 { "any", ANY}, 6612 { "bandwidth", BANDWIDTH}, 6613 { "binat", BINAT}, 6614 { "binat-anchor", BINATANCHOR}, 6615 { "binat-to", BINATTO}, 6616 { "bitmask", BITMASK}, 6617 { "block", BLOCK}, 6618 { "block-policy", BLOCKPOLICY}, 6619 { "bridge-to", BRIDGE_TO}, 6620 { "buckets", BUCKETS}, 6621 { "cbq", CBQ}, 6622 { "code", CODE}, 6623 { "codelq", CODEL}, 6624 { "debug", DEBUG}, 6625 { "divert-reply", DIVERTREPLY}, 6626 { "divert-to", DIVERTTO}, 6627 { "dnpipe", DNPIPE}, 6628 { "dnqueue", DNQUEUE}, 6629 { "drop", DROP}, 6630 { "dup-to", DUPTO}, 6631 { "endpoint-independent", ENDPI}, 6632 { "ether", ETHER}, 6633 { "fail-policy", FAILPOLICY}, 6634 { "fairq", FAIRQ}, 6635 { "fastroute", FASTROUTE}, 6636 { "file", FILENAME}, 6637 { "fingerprints", FINGERPRINTS}, 6638 { "flags", FLAGS}, 6639 { "floating", FLOATING}, 6640 { "flush", FLUSH}, 6641 { "for", FOR}, 6642 { "fragment", FRAGMENT}, 6643 { "from", FROM}, 6644 { "global", GLOBAL}, 6645 { "group", GROUP}, 6646 { "hfsc", HFSC}, 6647 { "hogs", HOGS}, 6648 { "hostid", HOSTID}, 6649 { "icmp-type", ICMPTYPE}, 6650 { "icmp6-type", ICMP6TYPE}, 6651 { "if-bound", IFBOUND}, 6652 { "in", IN}, 6653 { "include", INCLUDE}, 6654 { "inet", INET}, 6655 { "inet6", INET6}, 6656 { "interval", INTERVAL}, 6657 { "keep", KEEP}, 6658 { "keepcounters", KEEPCOUNTERS}, 6659 { "l3", L3}, 6660 { "label", LABEL}, 6661 { "limit", LIMIT}, 6662 { "linkshare", LINKSHARE}, 6663 { "load", LOAD}, 6664 { "log", LOG}, 6665 { "loginterface", LOGINTERFACE}, 6666 { "map-e-portset", MAPEPORTSET}, 6667 { "match", MATCH}, 6668 { "matches", MATCHES}, 6669 { "max", MAXIMUM}, 6670 { "max-mss", MAXMSS}, 6671 { "max-pkt-rate", MAXPKTRATE}, 6672 { "max-pkt-size", MAXPKTSIZE}, 6673 { "max-src-conn", MAXSRCCONN}, 6674 { "max-src-conn-rate", MAXSRCCONNRATE}, 6675 { "max-src-nodes", MAXSRCNODES}, 6676 { "max-src-states", MAXSRCSTATES}, 6677 { "min-ttl", MINTTL}, 6678 { "modulate", MODULATE}, 6679 { "nat", NAT}, 6680 { "nat-anchor", NATANCHOR}, 6681 { "nat-to", NATTO}, 6682 { "no", NO}, 6683 { "no-df", NODF}, 6684 { "no-route", NOROUTE}, 6685 { "no-sync", NOSYNC}, 6686 { "on", ON}, 6687 { "optimization", OPTIMIZATION}, 6688 { "os", OS}, 6689 { "out", OUT}, 6690 { "overload", OVERLOAD}, 6691 { "pass", PASS}, 6692 { "pflow", PFLOW}, 6693 { "port", PORT}, 6694 { "prefer-ipv6-nexthop", IPV6NH}, 6695 { "prio", PRIO}, 6696 { "priority", PRIORITY}, 6697 { "priq", PRIQ}, 6698 { "probability", PROBABILITY}, 6699 { "proto", PROTO}, 6700 { "qlimit", QLIMIT}, 6701 { "queue", QUEUE}, 6702 { "quick", QUICK}, 6703 { "random", RANDOM}, 6704 { "random-id", RANDOMID}, 6705 { "rdr", RDR}, 6706 { "rdr-anchor", RDRANCHOR}, 6707 { "rdr-to", RDRTO}, 6708 { "realtime", REALTIME}, 6709 { "reassemble", REASSEMBLE}, 6710 { "received-on", RECEIVEDON}, 6711 { "reply-to", REPLYTO}, 6712 { "require-order", REQUIREORDER}, 6713 { "return", RETURN}, 6714 { "return-icmp", RETURNICMP}, 6715 { "return-icmp6", RETURNICMP6}, 6716 { "return-rst", RETURNRST}, 6717 { "ridentifier", RIDENTIFIER}, 6718 { "round-robin", ROUNDROBIN}, 6719 { "route", ROUTE}, 6720 { "route-to", ROUTETO}, 6721 { "rtable", RTABLE}, 6722 { "rule", RULE}, 6723 { "ruleset-optimization", RULESET_OPTIMIZATION}, 6724 { "scrub", SCRUB}, 6725 { "set", SET}, 6726 { "set-tos", SETTOS}, 6727 { "skip", SKIP}, 6728 { "sloppy", SLOPPY}, 6729 { "source-hash", SOURCEHASH}, 6730 { "source-track", SOURCETRACK}, 6731 { "state", STATE}, 6732 { "state-defaults", STATEDEFAULTS}, 6733 { "state-policy", STATEPOLICY}, 6734 { "static-port", STATICPORT}, 6735 { "sticky-address", STICKYADDRESS}, 6736 { "syncookies", SYNCOOKIES}, 6737 { "synproxy", SYNPROXY}, 6738 { "table", TABLE}, 6739 { "tag", TAG}, 6740 { "tagged", TAGGED}, 6741 { "target", TARGET}, 6742 { "tbrsize", TBRSIZE}, 6743 { "timeout", TIMEOUT}, 6744 { "to", TO}, 6745 { "tos", TOS}, 6746 { "ttl", TTL}, 6747 { "upperlimit", UPPERLIMIT}, 6748 { "urpf-failed", URPFFAILED}, 6749 { "user", USER}, 6750 }; 6751 const struct keywords *p; 6752 6753 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 6754 sizeof(keywords[0]), kw_cmp); 6755 6756 if (p) { 6757 if (debug > 1) 6758 fprintf(stderr, "%s: %d\n", s, p->k_val); 6759 return (p->k_val); 6760 } else { 6761 if (debug > 1) 6762 fprintf(stderr, "string: %s\n", s); 6763 return (STRING); 6764 } 6765 } 6766 6767 #define START_EXPAND 1 6768 #define DONE_EXPAND 2 6769 6770 static int expanding; 6771 6772 int 6773 igetc(void) 6774 { 6775 int c; 6776 while (1) { 6777 if (file->ungetpos > 0) 6778 c = file->ungetbuf[--file->ungetpos]; 6779 else 6780 c = getc(file->stream); 6781 if (c == START_EXPAND) 6782 expanding = 1; 6783 else if (c == DONE_EXPAND) 6784 expanding = 0; 6785 else 6786 break; 6787 } 6788 return (c); 6789 } 6790 6791 int 6792 lgetc(int quotec) 6793 { 6794 int c, next; 6795 6796 if (quotec) { 6797 if ((c = igetc()) == EOF) { 6798 yyerror("reached end of file while parsing quoted string"); 6799 if (file == topfile || popfile() == EOF) 6800 return (EOF); 6801 return (quotec); 6802 } 6803 return (c); 6804 } 6805 6806 while ((c = igetc()) == '\\') { 6807 next = igetc(); 6808 if (next != '\n') { 6809 c = next; 6810 break; 6811 } 6812 yylval.lineno = file->lineno; 6813 file->lineno++; 6814 } 6815 6816 if (c == EOF) { 6817 /* 6818 * Fake EOL when hit EOF for the first time. This gets line 6819 * count right if last line in included file is syntactically 6820 * invalid and has no newline. 6821 */ 6822 if (file->eof_reached == 0) { 6823 file->eof_reached = 1; 6824 return ('\n'); 6825 } 6826 while (c == EOF) { 6827 if (file == topfile || popfile() == EOF) 6828 return (EOF); 6829 c = igetc(); 6830 } 6831 } 6832 return (c); 6833 } 6834 6835 void 6836 lungetc(int c) 6837 { 6838 if (c == EOF) 6839 return; 6840 if (file->ungetpos >= file->ungetsize) { 6841 void *p = reallocarray(file->ungetbuf, file->ungetsize, 2); 6842 if (p == NULL) 6843 err(1, "%s", __func__); 6844 file->ungetbuf = p; 6845 file->ungetsize *= 2; 6846 } 6847 file->ungetbuf[file->ungetpos++] = c; 6848 } 6849 6850 int 6851 findeol(void) 6852 { 6853 int c; 6854 6855 /* skip to either EOF or the first real EOL */ 6856 while (1) { 6857 c = lgetc(0); 6858 if (c == '\n') { 6859 file->lineno++; 6860 break; 6861 } 6862 if (c == EOF) 6863 break; 6864 } 6865 return (ERROR); 6866 } 6867 6868 int 6869 yylex(void) 6870 { 6871 char buf[8096]; 6872 char *p, *val; 6873 int quotec, next, c; 6874 int token; 6875 6876 top: 6877 p = buf; 6878 while ((c = lgetc(0)) == ' ' || c == '\t') 6879 ; /* nothing */ 6880 6881 yylval.lineno = file->lineno; 6882 if (c == '#') 6883 while ((c = lgetc(0)) != '\n' && c != EOF) 6884 ; /* nothing */ 6885 if (c == '$' && !expanding) { 6886 while (1) { 6887 if ((c = lgetc(0)) == EOF) 6888 return (0); 6889 6890 if (p + 1 >= buf + sizeof(buf) - 1) { 6891 yyerror("string too long"); 6892 return (findeol()); 6893 } 6894 if (isalnum(c) || c == '_') { 6895 *p++ = (char)c; 6896 continue; 6897 } 6898 *p = '\0'; 6899 lungetc(c); 6900 break; 6901 } 6902 val = symget(buf); 6903 if (val == NULL) { 6904 yyerror("macro '%s' not defined", buf); 6905 return (findeol()); 6906 } 6907 p = val + strlen(val) - 1; 6908 lungetc(DONE_EXPAND); 6909 while (p >= val) { 6910 lungetc(*p); 6911 p--; 6912 } 6913 lungetc(START_EXPAND); 6914 goto top; 6915 } 6916 6917 switch (c) { 6918 case '\'': 6919 case '"': 6920 quotec = c; 6921 while (1) { 6922 if ((c = lgetc(quotec)) == EOF) 6923 return (0); 6924 if (c == '\n') { 6925 file->lineno++; 6926 continue; 6927 } else if (c == '\\') { 6928 if ((next = lgetc(quotec)) == EOF) 6929 return (0); 6930 if (next == quotec || next == ' ' || 6931 next == '\t') 6932 c = next; 6933 else if (next == '\n') { 6934 file->lineno++; 6935 continue; 6936 } 6937 else 6938 lungetc(next); 6939 } else if (c == quotec) { 6940 *p = '\0'; 6941 break; 6942 } else if (c == '\0') { 6943 yyerror("syntax error"); 6944 return (findeol()); 6945 } 6946 if (p + 1 >= buf + sizeof(buf) - 1) { 6947 yyerror("string too long"); 6948 return (findeol()); 6949 } 6950 *p++ = (char)c; 6951 } 6952 yylval.v.string = strdup(buf); 6953 if (yylval.v.string == NULL) 6954 err(1, "%s: strdup", __func__); 6955 return (STRING); 6956 case '!': 6957 next = lgetc(0); 6958 if (next == '=') 6959 return (NE); 6960 lungetc(next); 6961 break; 6962 case '<': 6963 next = lgetc(0); 6964 if (next == '>') { 6965 yylval.v.i = PF_OP_XRG; 6966 return (PORTBINARY); 6967 } else if (next == '=') 6968 return (LE); 6969 lungetc(next); 6970 break; 6971 case '>': 6972 next = lgetc(0); 6973 if (next == '<') { 6974 yylval.v.i = PF_OP_IRG; 6975 return (PORTBINARY); 6976 } else if (next == '=') 6977 return (GE); 6978 lungetc(next); 6979 break; 6980 case '-': 6981 next = lgetc(0); 6982 if (next == '>') 6983 return (ARROW); 6984 lungetc(next); 6985 break; 6986 } 6987 6988 #define allowed_to_end_number(x) \ 6989 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=') 6990 6991 if (c == '-' || isdigit(c)) { 6992 do { 6993 *p++ = c; 6994 if ((size_t)(p-buf) >= sizeof(buf)) { 6995 yyerror("string too long"); 6996 return (findeol()); 6997 } 6998 } while ((c = lgetc(0)) != EOF && isdigit(c)); 6999 lungetc(c); 7000 if (p == buf + 1 && buf[0] == '-') 7001 goto nodigits; 7002 if (c == EOF || allowed_to_end_number(c)) { 7003 const char *errstr = NULL; 7004 7005 *p = '\0'; 7006 yylval.v.number = strtonum(buf, LLONG_MIN, 7007 LLONG_MAX, &errstr); 7008 if (errstr) { 7009 yyerror("\"%s\" invalid number: %s", 7010 buf, errstr); 7011 return (findeol()); 7012 } 7013 return (NUMBER); 7014 } else { 7015 nodigits: 7016 while (p > buf + 1) 7017 lungetc(*--p); 7018 c = *--p; 7019 if (c == '-') 7020 return (c); 7021 } 7022 } 7023 7024 #define allowed_in_string(x) \ 7025 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 7026 x != '{' && x != '}' && x != '<' && x != '>' && \ 7027 x != '!' && x != '=' && x != '/' && x != '#' && \ 7028 x != ',')) 7029 7030 if (isalnum(c) || c == ':' || c == '_') { 7031 do { 7032 *p++ = c; 7033 if ((size_t)(p-buf) >= sizeof(buf)) { 7034 yyerror("string too long"); 7035 return (findeol()); 7036 } 7037 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c))); 7038 lungetc(c); 7039 *p = '\0'; 7040 if ((token = lookup(buf)) == STRING) 7041 if ((yylval.v.string = strdup(buf)) == NULL) 7042 err(1, "%s: strdup", __func__); 7043 return (token); 7044 } 7045 if (c == '\n') { 7046 yylval.lineno = file->lineno; 7047 file->lineno++; 7048 } 7049 if (c == EOF) 7050 return (0); 7051 return (c); 7052 } 7053 7054 int 7055 check_file_secrecy(int fd, const char *fname) 7056 { 7057 struct stat st; 7058 7059 if (fstat(fd, &st)) { 7060 warn("cannot stat %s", fname); 7061 return (-1); 7062 } 7063 if (st.st_uid != 0 && st.st_uid != getuid()) { 7064 warnx("%s: owner not root or current user", fname); 7065 return (-1); 7066 } 7067 if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) { 7068 warnx("%s: group writable or world read/writable", fname); 7069 return (-1); 7070 } 7071 return (0); 7072 } 7073 7074 struct file * 7075 pushfile(const char *name, int secret) 7076 { 7077 struct file *nfile; 7078 7079 if ((nfile = calloc(1, sizeof(struct file))) == NULL || 7080 (nfile->name = strdup(name)) == NULL) { 7081 warn("%s", __func__); 7082 if (nfile) 7083 free(nfile); 7084 return (NULL); 7085 } 7086 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) { 7087 nfile->stream = stdin; 7088 free(nfile->name); 7089 if ((nfile->name = strdup("stdin")) == NULL) { 7090 warn("%s", __func__); 7091 free(nfile); 7092 return (NULL); 7093 } 7094 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) { 7095 warn("%s: %s", __func__, nfile->name); 7096 free(nfile->name); 7097 free(nfile); 7098 return (NULL); 7099 } else if (secret && 7100 check_file_secrecy(fileno(nfile->stream), nfile->name)) { 7101 fclose(nfile->stream); 7102 free(nfile->name); 7103 free(nfile); 7104 return (NULL); 7105 } 7106 nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0; 7107 nfile->ungetsize = 16; 7108 nfile->ungetbuf = malloc(nfile->ungetsize); 7109 if (nfile->ungetbuf == NULL) { 7110 warn("%s", __func__); 7111 fclose(nfile->stream); 7112 free(nfile->name); 7113 free(nfile); 7114 return (NULL); 7115 } 7116 TAILQ_INSERT_TAIL(&files, nfile, entry); 7117 return (nfile); 7118 } 7119 7120 int 7121 popfile(void) 7122 { 7123 struct file *prev; 7124 7125 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) 7126 prev->errors += file->errors; 7127 7128 TAILQ_REMOVE(&files, file, entry); 7129 fclose(file->stream); 7130 free(file->name); 7131 free(file->ungetbuf); 7132 free(file); 7133 file = prev; 7134 7135 return (file ? 0 : EOF); 7136 } 7137 7138 int 7139 parse_config(char *filename, struct pfctl *xpf) 7140 { 7141 int errors = 0; 7142 struct sym *sym; 7143 7144 pf = xpf; 7145 errors = 0; 7146 rulestate = PFCTL_STATE_NONE; 7147 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 7148 returnicmp6default = 7149 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 7150 blockpolicy = PFRULE_DROP; 7151 failpolicy = PFRULE_DROP; 7152 require_order = 1; 7153 7154 if ((file = pushfile(filename, 0)) == NULL) { 7155 warn("cannot open the main config file!"); 7156 return (-1); 7157 } 7158 topfile = file; 7159 7160 yyparse(); 7161 errors = file->errors; 7162 popfile(); 7163 7164 /* Free macros and check which have not been used. */ 7165 while ((sym = TAILQ_FIRST(&symhead))) { 7166 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 7167 fprintf(stderr, "warning: macro '%s' not " 7168 "used\n", sym->nam); 7169 free(sym->nam); 7170 free(sym->val); 7171 TAILQ_REMOVE(&symhead, sym, entry); 7172 free(sym); 7173 } 7174 7175 return (errors ? -1 : 0); 7176 } 7177 7178 int 7179 symset(const char *nam, const char *val, int persist) 7180 { 7181 struct sym *sym; 7182 7183 TAILQ_FOREACH(sym, &symhead, entry) { 7184 if (strcmp(nam, sym->nam) == 0) 7185 break; 7186 } 7187 7188 if (sym != NULL) { 7189 if (sym->persist == 1) 7190 return (0); 7191 else { 7192 free(sym->nam); 7193 free(sym->val); 7194 TAILQ_REMOVE(&symhead, sym, entry); 7195 free(sym); 7196 } 7197 } 7198 if ((sym = calloc(1, sizeof(*sym))) == NULL) 7199 return (-1); 7200 7201 sym->nam = strdup(nam); 7202 if (sym->nam == NULL) { 7203 free(sym); 7204 return (-1); 7205 } 7206 sym->val = strdup(val); 7207 if (sym->val == NULL) { 7208 free(sym->nam); 7209 free(sym); 7210 return (-1); 7211 } 7212 sym->used = 0; 7213 sym->persist = persist; 7214 TAILQ_INSERT_TAIL(&symhead, sym, entry); 7215 return (0); 7216 } 7217 7218 int 7219 pfctl_cmdline_symset(char *s) 7220 { 7221 char *sym, *val; 7222 int ret; 7223 7224 if ((val = strrchr(s, '=')) == NULL) 7225 return (-1); 7226 7227 sym = strndup(s, val - s); 7228 if (sym == NULL) 7229 err(1, "%s: malloc", __func__); 7230 7231 ret = symset(sym, val + 1, 1); 7232 free(sym); 7233 7234 return (ret); 7235 } 7236 7237 char * 7238 symget(const char *nam) 7239 { 7240 struct sym *sym; 7241 7242 TAILQ_FOREACH(sym, &symhead, entry) { 7243 if (strcmp(nam, sym->nam) == 0) { 7244 sym->used = 1; 7245 return (sym->val); 7246 } 7247 } 7248 return (NULL); 7249 } 7250 7251 void 7252 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst) 7253 { 7254 int i; 7255 struct pfctl_rule *r; 7256 7257 for (i = 0; i < PF_RULESET_MAX; ++i) { 7258 TAILQ_FOREACH(r, src->rules[i].active.ptr, entries) 7259 dst->anchor->match++; 7260 TAILQ_CONCAT(dst->rules[i].active.ptr, src->rules[i].active.ptr, entries); 7261 src->anchor->match = 0; 7262 TAILQ_CONCAT(dst->rules[i].inactive.ptr, src->rules[i].inactive.ptr, entries); 7263 } 7264 } 7265 7266 void 7267 mv_eth_rules(struct pfctl_eth_ruleset *src, struct pfctl_eth_ruleset *dst) 7268 { 7269 struct pfctl_eth_rule *r; 7270 7271 while ((r = TAILQ_FIRST(&src->rules)) != NULL) { 7272 TAILQ_REMOVE(&src->rules, r, entries); 7273 TAILQ_INSERT_TAIL(&dst->rules, r, entries); 7274 dst->anchor->match++; 7275 } 7276 src->anchor->match = 0; 7277 } 7278 7279 void 7280 decide_address_family(struct node_host *n, sa_family_t *af) 7281 { 7282 if (*af != 0 || n == NULL) 7283 return; 7284 *af = n->af; 7285 while ((n = n->next) != NULL) { 7286 if (n->af != *af) { 7287 *af = 0; 7288 return; 7289 } 7290 } 7291 } 7292 7293 void 7294 remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 7295 { 7296 struct node_host *n = *nh, *prev = NULL; 7297 7298 while (n != NULL) { 7299 if (*af && n->af && n->af != *af) { 7300 /* unlink and free n */ 7301 struct node_host *next = n->next; 7302 7303 /* adjust tail pointer */ 7304 if (n == (*nh)->tail) 7305 (*nh)->tail = prev; 7306 /* adjust previous node's next pointer */ 7307 if (prev == NULL) 7308 *nh = next; 7309 else 7310 prev->next = next; 7311 /* free node */ 7312 if (n->ifname != NULL) 7313 free(n->ifname); 7314 free(n); 7315 n = next; 7316 } else { 7317 if (n->af && !*af) 7318 *af = n->af; 7319 prev = n; 7320 n = n->next; 7321 } 7322 } 7323 } 7324 7325 int 7326 invalid_redirect(struct node_host *nh, sa_family_t af) 7327 { 7328 if (!af) { 7329 struct node_host *n; 7330 7331 /* tables and dyniftl are ok without an address family */ 7332 for (n = nh; n != NULL; n = n->next) { 7333 if (n->addr.type != PF_ADDR_TABLE && 7334 n->addr.type != PF_ADDR_DYNIFTL) { 7335 yyerror("address family not given and " 7336 "translation address expands to multiple " 7337 "address families"); 7338 return (1); 7339 } 7340 } 7341 } 7342 if (nh == NULL) { 7343 yyerror("no translation address with matching address family " 7344 "found."); 7345 return (1); 7346 } 7347 return (0); 7348 } 7349 7350 int 7351 atoul(char *s, u_long *ulvalp) 7352 { 7353 u_long ulval; 7354 char *ep; 7355 7356 errno = 0; 7357 ulval = strtoul(s, &ep, 0); 7358 if (s[0] == '\0' || *ep != '\0') 7359 return (-1); 7360 if (errno == ERANGE && ulval == ULONG_MAX) 7361 return (-1); 7362 *ulvalp = ulval; 7363 return (0); 7364 } 7365 7366 int 7367 getservice(char *n) 7368 { 7369 struct servent *s; 7370 u_long ulval; 7371 7372 if (atoul(n, &ulval) == 0) { 7373 if (ulval > 65535) { 7374 yyerror("illegal port value %lu", ulval); 7375 return (-1); 7376 } 7377 return (htons(ulval)); 7378 } else { 7379 s = getservbyname(n, "tcp"); 7380 if (s == NULL) 7381 s = getservbyname(n, "udp"); 7382 if (s == NULL) 7383 s = getservbyname(n, "sctp"); 7384 if (s == NULL) { 7385 yyerror("unknown port %s", n); 7386 return (-1); 7387 } 7388 return (s->s_port); 7389 } 7390 } 7391 7392 int 7393 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 7394 { 7395 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 7396 if (s[i] == NULL) 7397 return (0); 7398 7399 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 7400 sizeof(r->label[0])) { 7401 yyerror("rule label too long (max %d chars)", 7402 sizeof(r->label[0])-1); 7403 return (-1); 7404 } 7405 } 7406 return (0); 7407 } 7408 7409 int 7410 eth_rule_label(struct pfctl_eth_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT]) 7411 { 7412 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) { 7413 if (s[i] == NULL) 7414 return (0); 7415 7416 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >= 7417 sizeof(r->label[0])) { 7418 yyerror("rule label too long (max %d chars)", 7419 sizeof(r->label[0])-1); 7420 return (-1); 7421 } 7422 } 7423 return (0); 7424 } 7425 7426 u_int16_t 7427 parseicmpspec(char *w, sa_family_t af) 7428 { 7429 const struct icmpcodeent *p; 7430 u_long ulval; 7431 u_int8_t icmptype; 7432 7433 if (af == AF_INET) 7434 icmptype = returnicmpdefault >> 8; 7435 else 7436 icmptype = returnicmp6default >> 8; 7437 7438 if (atoul(w, &ulval) == -1) { 7439 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 7440 yyerror("unknown icmp code %s", w); 7441 return (0); 7442 } 7443 ulval = p->code; 7444 } 7445 if (ulval > 255) { 7446 yyerror("invalid icmp code %lu", ulval); 7447 return (0); 7448 } 7449 return (icmptype << 8 | ulval); 7450 } 7451 7452 int 7453 parseport(char *port, struct range *r, int extensions) 7454 { 7455 char *p = strchr(port, ':'); 7456 7457 if (p == NULL) { 7458 if ((r->a = getservice(port)) == -1) 7459 return (-1); 7460 r->b = 0; 7461 r->t = PF_OP_NONE; 7462 return (0); 7463 } 7464 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) { 7465 *p = 0; 7466 if ((r->a = getservice(port)) == -1) 7467 return (-1); 7468 r->b = 0; 7469 r->t = PF_OP_IRG; 7470 return (0); 7471 } 7472 if ((extensions & PPORT_RANGE)) { 7473 *p++ = 0; 7474 if ((r->a = getservice(port)) == -1 || 7475 (r->b = getservice(p)) == -1) 7476 return (-1); 7477 if (r->a == r->b) { 7478 r->b = 0; 7479 r->t = PF_OP_NONE; 7480 } else 7481 r->t = PF_OP_RRG; 7482 return (0); 7483 } 7484 return (-1); 7485 } 7486 7487 int 7488 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans) 7489 { 7490 struct loadanchors *la; 7491 7492 TAILQ_FOREACH(la, &loadanchorshead, entries) { 7493 if (pf->opts & PF_OPT_VERBOSE) 7494 fprintf(stderr, "\nLoading anchor %s from %s\n", 7495 la->anchorname, la->filename); 7496 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize, 7497 la->anchorname, trans) == -1) 7498 return (-1); 7499 } 7500 7501 return (0); 7502 } 7503 7504 int 7505 kw_casecmp(const void *k, const void *e) 7506 { 7507 return (strcasecmp(k, ((const struct keywords *)e)->k_name)); 7508 } 7509 7510 int 7511 map_tos(char *s, int *val) 7512 { 7513 /* DiffServ Codepoints and other TOS mappings */ 7514 const struct keywords toswords[] = { 7515 { "af11", IPTOS_DSCP_AF11 }, 7516 { "af12", IPTOS_DSCP_AF12 }, 7517 { "af13", IPTOS_DSCP_AF13 }, 7518 { "af21", IPTOS_DSCP_AF21 }, 7519 { "af22", IPTOS_DSCP_AF22 }, 7520 { "af23", IPTOS_DSCP_AF23 }, 7521 { "af31", IPTOS_DSCP_AF31 }, 7522 { "af32", IPTOS_DSCP_AF32 }, 7523 { "af33", IPTOS_DSCP_AF33 }, 7524 { "af41", IPTOS_DSCP_AF41 }, 7525 { "af42", IPTOS_DSCP_AF42 }, 7526 { "af43", IPTOS_DSCP_AF43 }, 7527 { "critical", IPTOS_PREC_CRITIC_ECP }, 7528 { "cs0", IPTOS_DSCP_CS0 }, 7529 { "cs1", IPTOS_DSCP_CS1 }, 7530 { "cs2", IPTOS_DSCP_CS2 }, 7531 { "cs3", IPTOS_DSCP_CS3 }, 7532 { "cs4", IPTOS_DSCP_CS4 }, 7533 { "cs5", IPTOS_DSCP_CS5 }, 7534 { "cs6", IPTOS_DSCP_CS6 }, 7535 { "cs7", IPTOS_DSCP_CS7 }, 7536 { "ef", IPTOS_DSCP_EF }, 7537 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL }, 7538 { "lowdelay", IPTOS_LOWDELAY }, 7539 { "netcontrol", IPTOS_PREC_NETCONTROL }, 7540 { "reliability", IPTOS_RELIABILITY }, 7541 { "throughput", IPTOS_THROUGHPUT }, 7542 { "va", IPTOS_DSCP_VA } 7543 }; 7544 const struct keywords *p; 7545 7546 p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]), 7547 sizeof(toswords[0]), kw_casecmp); 7548 7549 if (p) { 7550 *val = p->k_val; 7551 return (1); 7552 } 7553 return (0); 7554 } 7555 7556 int 7557 rt_tableid_max(void) 7558 { 7559 #ifdef __FreeBSD__ 7560 int fibs; 7561 size_t l = sizeof(fibs); 7562 7563 if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1) 7564 fibs = 16; /* XXX RT_MAXFIBS, at least limit it some. */ 7565 /* 7566 * As the OpenBSD code only compares > and not >= we need to adjust 7567 * here given we only accept values of 0..n and want to avoid #ifdefs 7568 * in the grammar. 7569 */ 7570 return (fibs - 1); 7571 #else 7572 return (RT_TABLEID_MAX); 7573 #endif 7574 } 7575 7576 struct node_mac* 7577 node_mac_from_string(const char *str) 7578 { 7579 struct node_mac *m; 7580 7581 m = calloc(1, sizeof(struct node_mac)); 7582 if (m == NULL) 7583 err(1, "%s: calloc", __func__); 7584 7585 if (sscanf(str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 7586 &m->mac[0], &m->mac[1], &m->mac[2], &m->mac[3], &m->mac[4], 7587 &m->mac[5]) != 6) { 7588 free(m); 7589 yyerror("invalid MAC address"); 7590 return (NULL); 7591 } 7592 7593 memset(m->mask, 0xff, ETHER_ADDR_LEN); 7594 m->isset = true; 7595 m->next = NULL; 7596 m->tail = m; 7597 7598 return (m); 7599 } 7600 7601 struct node_mac* 7602 node_mac_from_string_masklen(const char *str, int masklen) 7603 { 7604 struct node_mac *m; 7605 7606 if (masklen < 0 || masklen > (ETHER_ADDR_LEN * 8)) { 7607 yyerror("invalid MAC mask length"); 7608 return (NULL); 7609 } 7610 7611 m = node_mac_from_string(str); 7612 if (m == NULL) 7613 return (NULL); 7614 7615 memset(m->mask, 0, ETHER_ADDR_LEN); 7616 for (int i = 0; i < masklen; i++) 7617 m->mask[i / 8] |= 1 << (i % 8); 7618 7619 return (m); 7620 } 7621 7622 struct node_mac* 7623 node_mac_from_string_mask(const char *str, const char *mask) 7624 { 7625 struct node_mac *m; 7626 7627 m = node_mac_from_string(str); 7628 if (m == NULL) 7629 return (NULL); 7630 7631 if (sscanf(mask, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", 7632 &m->mask[0], &m->mask[1], &m->mask[2], &m->mask[3], &m->mask[4], 7633 &m->mask[5]) != 6) { 7634 free(m); 7635 yyerror("invalid MAC mask"); 7636 return (NULL); 7637 } 7638 7639 return (m); 7640 } 7641 7642 int 7643 filteropts_to_rule(struct pfctl_rule *r, struct filter_opts *opts) 7644 { 7645 r->keep_state = opts->keep.action; 7646 r->pktrate.limit = opts->pktrate.limit; 7647 r->pktrate.seconds = opts->pktrate.seconds; 7648 r->prob = opts->prob; 7649 r->rtableid = opts->rtableid; 7650 r->ridentifier = opts->ridentifier; 7651 r->max_pkt_size = opts->max_pkt_size; 7652 r->tos = opts->tos; 7653 7654 if (opts->nodf) 7655 r->scrub_flags |= PFSTATE_NODF; 7656 if (opts->randomid) 7657 r->scrub_flags |= PFSTATE_RANDOMID; 7658 if (opts->minttl) 7659 r->min_ttl = opts->minttl; 7660 if (opts->max_mss) 7661 r->max_mss = opts->max_mss; 7662 7663 if (opts->tag) 7664 if (strlcpy(r->tagname, opts->tag, 7665 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 7666 yyerror("tag too long, max %u chars", 7667 PF_TAG_NAME_SIZE - 1); 7668 return (1); 7669 } 7670 if (opts->match_tag) 7671 if (strlcpy(r->match_tagname, opts->match_tag, 7672 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) { 7673 yyerror("tag too long, max %u chars", 7674 PF_TAG_NAME_SIZE - 1); 7675 return (1); 7676 } 7677 r->match_tag_not = opts->match_tag_not; 7678 7679 if (rule_label(r, opts->label)) 7680 return (1); 7681 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) 7682 free(opts->label[i]); 7683 7684 if (opts->marker & FOM_AFTO) 7685 r->rule_flag |= PFRULE_AFTO; 7686 if (opts->marker & FOM_SCRUB_TCP) 7687 r->scrub_flags |= PFSTATE_SCRUB_TCP; 7688 if (opts->marker & FOM_PRIO) 7689 r->prio = opts->prio ? opts->prio : PF_PRIO_ZERO; 7690 if (opts->marker & FOM_SETPRIO) { 7691 r->set_prio[0] = opts->set_prio[0]; 7692 r->set_prio[1] = opts->set_prio[1]; 7693 r->scrub_flags |= PFSTATE_SETPRIO; 7694 } 7695 if (opts->marker & FOM_SETTOS) { 7696 r->scrub_flags |= PFSTATE_SETTOS; 7697 r->set_tos = opts->settos; 7698 } 7699 7700 r->flags = opts->flags.b1; 7701 r->flagset = opts->flags.b2; 7702 if ((opts->flags.b1 & opts->flags.b2) != opts->flags.b1) { 7703 yyerror("flags always false"); 7704 return (1); 7705 } 7706 7707 if (opts->queues.qname != NULL) { 7708 if (strlcpy(r->qname, opts->queues.qname, 7709 sizeof(r->qname)) >= sizeof(r->qname)) { 7710 yyerror("rule qname too long (max " 7711 "%d chars)", sizeof(r->qname)-1); 7712 return (1); 7713 } 7714 free(opts->queues.qname); 7715 } 7716 if (opts->queues.pqname != NULL) { 7717 if (strlcpy(r->pqname, opts->queues.pqname, 7718 sizeof(r->pqname)) >= sizeof(r->pqname)) { 7719 yyerror("rule pqname too long (max " 7720 "%d chars)", sizeof(r->pqname)-1); 7721 return (1); 7722 } 7723 free(opts->queues.pqname); 7724 } 7725 7726 if (opts->fragment) 7727 r->rule_flag |= PFRULE_FRAGMENT; 7728 r->allow_opts = opts->allowopts; 7729 7730 return (0); 7731 } 7732