parse.y revision 126353
1/* $OpenBSD: parse.y,v 1.415 2003/09/01 15:07:40 henning Exp $ */ 2 3/* 4 * Copyright (c) 2001 Markus Friedl. All rights reserved. 5 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27%{ 28#include <sys/types.h> 29#include <sys/socket.h> 30#include <net/if.h> 31#include <netinet/in.h> 32#include <netinet/in_systm.h> 33#include <netinet/ip.h> 34#include <netinet/ip_icmp.h> 35#include <netinet/icmp6.h> 36#include <net/pfvar.h> 37#include <arpa/inet.h> 38#include <altq/altq.h> 39#include <altq/altq_cbq.h> 40#include <altq/altq_priq.h> 41#include <altq/altq_hfsc.h> 42 43#include <stdio.h> 44#include <stdlib.h> 45#include <netdb.h> 46#include <stdarg.h> 47#include <errno.h> 48#include <string.h> 49#include <ctype.h> 50#include <err.h> 51#include <pwd.h> 52#include <grp.h> 53#include <md5.h> 54 55#include "pfctl_parser.h" 56#include "pfctl.h" 57 58static struct pfctl *pf = NULL; 59static FILE *fin = NULL; 60static int debug = 0; 61static int lineno = 1; 62static int errors = 0; 63static int rulestate = 0; 64static u_int16_t returnicmpdefault = 65 (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 66static u_int16_t returnicmp6default = 67 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 68static int blockpolicy = PFRULE_DROP; 69static int require_order = 1; 70 71enum { 72 PFCTL_STATE_NONE, 73 PFCTL_STATE_OPTION, 74 PFCTL_STATE_SCRUB, 75 PFCTL_STATE_QUEUE, 76 PFCTL_STATE_NAT, 77 PFCTL_STATE_FILTER 78}; 79 80struct node_proto { 81 u_int8_t proto; 82 struct node_proto *next; 83 struct node_proto *tail; 84}; 85 86struct node_port { 87 u_int16_t port[2]; 88 u_int8_t op; 89 struct node_port *next; 90 struct node_port *tail; 91}; 92 93struct node_uid { 94 uid_t uid[2]; 95 u_int8_t op; 96 struct node_uid *next; 97 struct node_uid *tail; 98}; 99 100struct node_gid { 101 gid_t gid[2]; 102 u_int8_t op; 103 struct node_gid *next; 104 struct node_gid *tail; 105}; 106 107struct node_icmp { 108 u_int8_t code; 109 u_int8_t type; 110 u_int8_t proto; 111 struct node_icmp *next; 112 struct node_icmp *tail; 113}; 114 115enum { PF_STATE_OPT_MAX=0, PF_STATE_OPT_TIMEOUT=1 }; 116struct node_state_opt { 117 int type; 118 union { 119 u_int32_t max_states; 120 struct { 121 int number; 122 u_int32_t seconds; 123 } timeout; 124 } data; 125 struct node_state_opt *next; 126 struct node_state_opt *tail; 127}; 128 129struct peer { 130 struct node_host *host; 131 struct node_port *port; 132}; 133 134struct node_queue { 135 char queue[PF_QNAME_SIZE]; 136 char parent[PF_QNAME_SIZE]; 137 char ifname[IFNAMSIZ]; 138 int scheduler; 139 struct node_queue *next; 140 struct node_queue *tail; 141} *queues = NULL; 142 143struct node_qassign { 144 char *qname; 145 char *pqname; 146}; 147 148struct filter_opts { 149 int marker; 150#define FOM_FLAGS 0x01 151#define FOM_ICMP 0x02 152#define FOM_TOS 0x04 153#define FOM_KEEP 0x08 154 struct node_uid *uid; 155 struct node_gid *gid; 156 struct { 157 u_int8_t b1; 158 u_int8_t b2; 159 u_int16_t w; 160 u_int16_t w2; 161 } flags; 162 struct node_icmp *icmpspec; 163 u_int32_t tos; 164 struct { 165 int action; 166 struct node_state_opt *options; 167 } keep; 168 int fragment; 169 int allowopts; 170 char *label; 171 struct node_qassign queues; 172 char *tag; 173 char *match_tag; 174 u_int8_t match_tag_not; 175} filter_opts; 176 177struct antispoof_opts { 178 char *label; 179} antispoof_opts; 180 181struct scrub_opts { 182 int marker; 183#define SOM_MINTTL 0x01 184#define SOM_MAXMSS 0x02 185#define SOM_FRAGCACHE 0x04 186 int nodf; 187 int minttl; 188 int maxmss; 189 int fragcache; 190 int randomid; 191 int reassemble_tcp; 192} scrub_opts; 193 194struct queue_opts { 195 int marker; 196#define QOM_BWSPEC 0x01 197#define QOM_SCHEDULER 0x02 198#define QOM_PRIORITY 0x04 199#define QOM_TBRSIZE 0x08 200#define QOM_QLIMIT 0x10 201 struct node_queue_bw queue_bwspec; 202 struct node_queue_opt scheduler; 203 int priority; 204 int tbrsize; 205 int qlimit; 206} queue_opts; 207 208struct table_opts { 209 int flags; 210 int init_addr; 211 struct node_tinithead init_nodes; 212} table_opts; 213 214struct node_hfsc_opts hfsc_opts; 215 216int yyerror(const char *, ...); 217int disallow_table(struct node_host *, const char *); 218int rule_consistent(struct pf_rule *); 219int filter_consistent(struct pf_rule *); 220int nat_consistent(struct pf_rule *); 221int rdr_consistent(struct pf_rule *); 222int process_tabledef(char *, struct table_opts *); 223int yyparse(void); 224void expand_label_str(char *, const char *, const char *); 225void expand_label_if(const char *, char *, const char *); 226void expand_label_addr(const char *, char *, u_int8_t, struct node_host *); 227void expand_label_port(const char *, char *, struct node_port *); 228void expand_label_proto(const char *, char *, u_int8_t); 229void expand_label_nr(const char *, char *); 230void expand_label(char *, const char *, u_int8_t, struct node_host *, 231 struct node_port *, struct node_host *, struct node_port *, 232 u_int8_t); 233void expand_rule(struct pf_rule *, struct node_if *, struct node_host *, 234 struct node_proto *, struct node_os*, struct node_host *, 235 struct node_port *, struct node_host *, struct node_port *, 236 struct node_uid *, struct node_gid *, struct node_icmp *); 237int expand_altq(struct pf_altq *, struct node_if *, struct node_queue *, 238 struct node_queue_bw bwspec, struct node_queue_opt *); 239int expand_queue(struct pf_altq *, struct node_if *, struct node_queue *, 240 struct node_queue_bw, struct node_queue_opt *); 241 242int check_rulestate(int); 243int kw_cmp(const void *, const void *); 244int lookup(char *); 245int lgetc(FILE *); 246int lungetc(int); 247int findeol(void); 248int yylex(void); 249int atoul(char *, u_long *); 250int getservice(char *); 251int rule_label(struct pf_rule *, char *); 252 253TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 254struct sym { 255 TAILQ_ENTRY(sym) entries; 256 int used; 257 int persist; 258 char *nam; 259 char *val; 260}; 261 262 263int symset(const char *, const char *, int); 264char *symget(const char *); 265 266void decide_address_family(struct node_host *, sa_family_t *); 267void remove_invalid_hosts(struct node_host **, sa_family_t *); 268int invalid_redirect(struct node_host *, sa_family_t); 269u_int16_t parseicmpspec(char *, sa_family_t); 270 271TAILQ_HEAD(loadanchorshead, loadanchors) loadanchorshead = 272 TAILQ_HEAD_INITIALIZER(loadanchorshead); 273struct loadanchors { 274 TAILQ_ENTRY(loadanchors) entries; 275 char *anchorname; 276 char *rulesetname; 277 char *filename; 278}; 279 280typedef struct { 281 union { 282 u_int32_t number; 283 int i; 284 char *string; 285 struct { 286 u_int8_t b1; 287 u_int8_t b2; 288 u_int16_t w; 289 u_int16_t w2; 290 } b; 291 struct range { 292 int a; 293 int b; 294 int t; 295 } range; 296 struct node_if *interface; 297 struct node_proto *proto; 298 struct node_icmp *icmp; 299 struct node_host *host; 300 struct node_os *os; 301 struct node_port *port; 302 struct node_uid *uid; 303 struct node_gid *gid; 304 struct node_state_opt *state_opt; 305 struct peer peer; 306 struct { 307 struct peer src, dst; 308 struct node_os *src_os; 309 } fromto; 310 struct pf_poolhashkey *hashkey; 311 struct { 312 struct node_host *host; 313 u_int8_t rt; 314 u_int8_t pool_opts; 315 sa_family_t af; 316 struct pf_poolhashkey *key; 317 } route; 318 struct redirection { 319 struct node_host *host; 320 struct range rport; 321 } *redirection; 322 struct { 323 int type; 324 struct pf_poolhashkey *key; 325 } pooltype; 326 struct { 327 int action; 328 struct node_state_opt *options; 329 } keep_state; 330 struct { 331 u_int8_t log; 332 u_int8_t quick; 333 } logquick; 334 struct node_queue *queue; 335 struct node_queue_opt queue_options; 336 struct node_queue_bw queue_bwspec; 337 struct node_qassign qassign; 338 struct filter_opts filter_opts; 339 struct antispoof_opts antispoof_opts; 340 struct queue_opts queue_opts; 341 struct scrub_opts scrub_opts; 342 struct table_opts table_opts; 343 struct node_hfsc_opts hfsc_opts; 344 } v; 345 int lineno; 346} YYSTYPE; 347 348#define PREPARE_ANCHOR_RULE(r, a) \ 349 do { \ 350 memset(&(r), 0, sizeof(r)); \ 351 if (strlcpy(r.anchorname, (a), \ 352 sizeof(r.anchorname)) >= \ 353 sizeof(r.anchorname)) { \ 354 yyerror("anchor name '%s' too long", \ 355 (a)); \ 356 YYERROR; \ 357 } \ 358 } while (0) 359 360%} 361 362%token PASS BLOCK SCRUB RETURN IN OS OUT LOG LOGALL QUICK ON FROM TO FLAGS 363%token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 364%token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 365%token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 366%token NOROUTE FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 367%token REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 368%token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID 369%token REQUIREORDER SYNPROXY FINGERPRINTS 370%token ANTISPOOF FOR 371%token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT 372%token ALTQ CBQ PRIQ HFSC BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT 373%token QUEUE PRIORITY QLIMIT 374%token LOAD 375%token TAGGED TAG 376%token <v.string> STRING 377%token <v.i> PORTBINARY 378%type <v.interface> interface if_list if_item_not if_item 379%type <v.number> number icmptype icmp6type uid gid 380%type <v.number> tos not yesno natpass 381%type <v.i> no dir log af fragcache 382%type <v.i> staticport unaryop 383%type <v.b> action nataction flags flag blockspec 384%type <v.range> port rport 385%type <v.hashkey> hashkey 386%type <v.pooltype> pooltype 387%type <v.proto> proto proto_list proto_item 388%type <v.icmp> icmpspec 389%type <v.icmp> icmp_list icmp_item 390%type <v.icmp> icmp6_list icmp6_item 391%type <v.fromto> fromto 392%type <v.peer> ipportspec from to 393%type <v.host> ipspec xhost host dynaddr host_list 394%type <v.host> redir_host_list redirspec 395%type <v.host> route_host route_host_list routespec 396%type <v.os> os xos os_list 397%type <v.port> portspec port_list port_item 398%type <v.uid> uids uid_list uid_item 399%type <v.gid> gids gid_list gid_item 400%type <v.route> route 401%type <v.redirection> redirection redirpool 402%type <v.string> label string tag 403%type <v.keep_state> keep 404%type <v.state_opt> state_opt_spec state_opt_list state_opt_item 405%type <v.logquick> logquick 406%type <v.interface> antispoof_ifspc antispoof_iflst 407%type <v.qassign> qname 408%type <v.queue> qassign qassign_list qassign_item 409%type <v.queue_options> scheduler 410%type <v.number> cbqflags_list cbqflags_item 411%type <v.number> priqflags_list priqflags_item 412%type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 413%type <v.queue_bwspec> bandwidth 414%type <v.filter_opts> filter_opts filter_opt filter_opts_l 415%type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 416%type <v.queue_opts> queue_opts queue_opt queue_opts_l 417%type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 418%type <v.table_opts> table_opts table_opt table_opts_l 419%% 420 421ruleset : /* empty */ 422 | ruleset '\n' 423 | ruleset option '\n' 424 | ruleset scrubrule '\n' 425 | ruleset natrule '\n' 426 | ruleset binatrule '\n' 427 | ruleset pfrule '\n' 428 | ruleset anchorrule '\n' 429 | ruleset loadrule '\n' 430 | ruleset altqif '\n' 431 | ruleset queuespec '\n' 432 | ruleset varset '\n' 433 | ruleset antispoof '\n' 434 | ruleset tabledef '\n' 435 | ruleset error '\n' { errors++; } 436 ; 437 438option : SET OPTIMIZATION STRING { 439 if (check_rulestate(PFCTL_STATE_OPTION)) 440 YYERROR; 441 if (pfctl_set_optimization(pf, $3) != 0) { 442 yyerror("unknown optimization %s", $3); 443 YYERROR; 444 } 445 } 446 | SET TIMEOUT timeout_spec 447 | SET TIMEOUT '{' timeout_list '}' 448 | SET LIMIT limit_spec 449 | SET LIMIT '{' limit_list '}' 450 | SET LOGINTERFACE STRING { 451 if (check_rulestate(PFCTL_STATE_OPTION)) 452 YYERROR; 453 if ((ifa_exists($3) == NULL) && strcmp($3, "none")) { 454 yyerror("interface %s doesn't exist", $3); 455 YYERROR; 456 } 457 if (pfctl_set_logif(pf, $3) != 0) { 458 yyerror("error setting loginterface %s", $3); 459 YYERROR; 460 } 461 } 462 | SET BLOCKPOLICY DROP { 463 if (pf->opts & PF_OPT_VERBOSE) 464 printf("set block-policy drop\n"); 465 if (check_rulestate(PFCTL_STATE_OPTION)) 466 YYERROR; 467 blockpolicy = PFRULE_DROP; 468 } 469 | SET BLOCKPOLICY RETURN { 470 if (pf->opts & PF_OPT_VERBOSE) 471 printf("set block-policy return\n"); 472 if (check_rulestate(PFCTL_STATE_OPTION)) 473 YYERROR; 474 blockpolicy = PFRULE_RETURN; 475 } 476 | SET REQUIREORDER yesno { 477 if (pf->opts & PF_OPT_VERBOSE) 478 printf("set require-order %s\n", 479 $3 == 1 ? "yes" : "no"); 480 require_order = $3; 481 } 482 | SET FINGERPRINTS STRING { 483 if (pf->opts & PF_OPT_VERBOSE) 484 printf("fingerprints %s\n", $3); 485 if (check_rulestate(PFCTL_STATE_OPTION)) 486 YYERROR; 487 if (pfctl_file_fingerprints(pf->dev, pf->opts, $3)) { 488 yyerror("error loading fingerprints %s", $3); 489 YYERROR; 490 } 491 } 492 ; 493 494string : string STRING { 495 if (asprintf(&$$, "%s %s", $1, $2) == -1) 496 err(1, "string: asprintf"); 497 free($1); 498 free($2); 499 } 500 | STRING 501 ; 502 503varset : STRING '=' string { 504 if (pf->opts & PF_OPT_VERBOSE) 505 printf("%s = \"%s\"\n", $1, $3); 506 if (symset($1, $3, 0) == -1) 507 err(1, "cannot store variable %s", $1); 508 } 509 ; 510 511anchorrule : ANCHOR string dir interface af proto fromto { 512 struct pf_rule r; 513 514 if (check_rulestate(PFCTL_STATE_FILTER)) 515 YYERROR; 516 517 PREPARE_ANCHOR_RULE(r, $2); 518 r.direction = $3; 519 r.af = $5; 520 521 decide_address_family($7.src.host, &r.af); 522 decide_address_family($7.dst.host, &r.af); 523 524 expand_rule(&r, $4, NULL, $6, $7.src_os, 525 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 526 0, 0, 0); 527 } 528 | NATANCHOR string interface af proto fromto { 529 struct pf_rule r; 530 531 if (check_rulestate(PFCTL_STATE_NAT)) 532 YYERROR; 533 534 PREPARE_ANCHOR_RULE(r, $2); 535 r.action = PF_NAT; 536 r.af = $4; 537 538 decide_address_family($6.src.host, &r.af); 539 decide_address_family($6.dst.host, &r.af); 540 541 expand_rule(&r, $3, NULL, $5, $6.src_os, 542 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 543 0, 0, 0); 544 } 545 | RDRANCHOR string interface af proto fromto { 546 struct pf_rule r; 547 548 if (check_rulestate(PFCTL_STATE_NAT)) 549 YYERROR; 550 551 PREPARE_ANCHOR_RULE(r, $2); 552 r.action = PF_RDR; 553 r.af = $4; 554 555 decide_address_family($6.src.host, &r.af); 556 decide_address_family($6.dst.host, &r.af); 557 558 if ($6.src.port != NULL) { 559 yyerror("source port parameter not supported" 560 " in rdr-anchor"); 561 YYERROR; 562 } 563 if ($6.dst.port != NULL) { 564 if ($6.dst.port->next != NULL) { 565 yyerror("destination port list " 566 "expansion not supported in " 567 "rdr-anchor"); 568 YYERROR; 569 } else if ($6.dst.port->op != PF_OP_EQ) { 570 yyerror("destination port operators" 571 " not supported in rdr-anchor"); 572 YYERROR; 573 } 574 r.dst.port[0] = $6.dst.port->port[0]; 575 r.dst.port[1] = $6.dst.port->port[1]; 576 r.dst.port_op = $6.dst.port->op; 577 } 578 579 expand_rule(&r, $3, NULL, $5, $6.src_os, 580 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 581 0, 0, 0); 582 } 583 | BINATANCHOR string interface af proto fromto { 584 struct pf_rule r; 585 586 if (check_rulestate(PFCTL_STATE_NAT)) 587 YYERROR; 588 589 PREPARE_ANCHOR_RULE(r, $2); 590 r.action = PF_BINAT; 591 r.af = $4; 592 if ($5 != NULL) { 593 if ($5->next != NULL) { 594 yyerror("proto list expansion" 595 " not supported in binat-anchor"); 596 YYERROR; 597 } 598 r.proto = $5->proto; 599 free($5); 600 } 601 602 if ($6.src.host != NULL || $6.src.port != NULL || 603 $6.dst.host != NULL || $6.dst.port != NULL) { 604 yyerror("fromto parameter not supported" 605 " in binat-anchor"); 606 YYERROR; 607 } 608 609 decide_address_family($6.src.host, &r.af); 610 decide_address_family($6.dst.host, &r.af); 611 612 pfctl_add_rule(pf, &r); 613 } 614 ; 615 616loadrule : LOAD ANCHOR string FROM string { 617 char *t; 618 struct loadanchors *loadanchor; 619 620 t = strsep(&$3, ":"); 621 if (*t == '\0' || *$3 == '\0') { 622 yyerror("anchor '%s' invalid\n", $3); 623 YYERROR; 624 } 625 if (strlen(t) >= PF_ANCHOR_NAME_SIZE) { 626 yyerror("anchorname %s too long, max %u\n", 627 t, PF_ANCHOR_NAME_SIZE - 1); 628 YYERROR; 629 } 630 if (strlen($3) >= PF_RULESET_NAME_SIZE) { 631 yyerror("rulesetname %s too long, max %u\n", 632 $3, PF_RULESET_NAME_SIZE - 1); 633 YYERROR; 634 } 635 636 loadanchor = calloc(1, sizeof(struct loadanchors)); 637 if (loadanchor == NULL) 638 err(1, "loadrule: calloc"); 639 if ((loadanchor->anchorname = strdup(t)) == NULL) 640 err(1, "loadrule: strdup"); 641 if ((loadanchor->rulesetname = strdup($3)) == NULL) 642 err(1, "loadrule: strdup"); 643 if ((loadanchor->filename = strdup($5)) == NULL) 644 err(1, "loadrule: strdup"); 645 646 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 647 entries); 648 649 free(t); /* not $3 */ 650 free($5); 651 }; 652 653scrubrule : SCRUB dir logquick interface af proto fromto scrub_opts 654 { 655 struct pf_rule r; 656 657 if (check_rulestate(PFCTL_STATE_SCRUB)) 658 YYERROR; 659 660 memset(&r, 0, sizeof(r)); 661 662 r.action = PF_SCRUB; 663 r.direction = $2; 664 665 r.log = $3.log; 666 if ($3.quick) { 667 yyerror("scrub rules do not support 'quick'"); 668 YYERROR; 669 } 670 671 if ($4) { 672 if ($4->not) { 673 yyerror("scrub rules do not support " 674 "'! <if>'"); 675 YYERROR; 676 } 677 } 678 r.af = $5; 679 if ($8.nodf) 680 r.rule_flag |= PFRULE_NODF; 681 if ($8.randomid) 682 r.rule_flag |= PFRULE_RANDOMID; 683 if ($8.reassemble_tcp) { 684 if (r.direction != PF_INOUT) { 685 yyerror("reassemble tcp rules can not " 686 "specify direction"); 687 YYERROR; 688 } 689 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 690 } 691 if ($8.minttl) 692 r.min_ttl = $8.minttl; 693 if ($8.maxmss) 694 r.max_mss = $8.maxmss; 695 if ($8.fragcache) 696 r.rule_flag |= $8.fragcache; 697 698 expand_rule(&r, $4, NULL, $6, $7.src_os, 699 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 700 NULL, NULL, NULL); 701 } 702 ; 703 704scrub_opts : { 705 bzero(&scrub_opts, sizeof scrub_opts); 706 } 707 scrub_opts_l 708 { $$ = scrub_opts; } 709 | /* empty */ { 710 bzero(&scrub_opts, sizeof scrub_opts); 711 $$ = scrub_opts; 712 } 713 ; 714 715scrub_opts_l : scrub_opts_l scrub_opt 716 | scrub_opt 717 ; 718 719scrub_opt : NODF { 720 if (scrub_opts.nodf) { 721 yyerror("no-df cannot be respecified"); 722 YYERROR; 723 } 724 scrub_opts.nodf = 1; 725 } 726 | MINTTL number { 727 if (scrub_opts.marker & SOM_MINTTL) { 728 yyerror("min-ttl cannot be respecified"); 729 YYERROR; 730 } 731 if ($2 > 255) { 732 yyerror("illegal min-ttl value %d", $2); 733 YYERROR; 734 } 735 scrub_opts.marker |= SOM_MINTTL; 736 scrub_opts.minttl = $2; 737 } 738 | MAXMSS number { 739 if (scrub_opts.marker & SOM_MAXMSS) { 740 yyerror("max-mss cannot be respecified"); 741 YYERROR; 742 } 743 if ($2 > 65535) { 744 yyerror("illegal max-mss value %d", $2); 745 YYERROR; 746 } 747 scrub_opts.marker |= SOM_MAXMSS; 748 scrub_opts.maxmss = $2; 749 } 750 | fragcache { 751 if (scrub_opts.marker & SOM_FRAGCACHE) { 752 yyerror("fragcache cannot be respecified"); 753 YYERROR; 754 } 755 scrub_opts.marker |= SOM_FRAGCACHE; 756 scrub_opts.fragcache = $1; 757 } 758 | REASSEMBLE STRING { 759 if (strcasecmp($2, "tcp") != 0) 760 YYERROR; 761 if (scrub_opts.reassemble_tcp) { 762 yyerror("reassemble tcp cannot be respecified"); 763 YYERROR; 764 } 765 scrub_opts.reassemble_tcp = 1; 766 } 767 | RANDOMID { 768 if (scrub_opts.randomid) { 769 yyerror("random-id cannot be respecified"); 770 YYERROR; 771 } 772 scrub_opts.randomid = 1; 773 } 774 ; 775 776fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 777 | FRAGMENT FRAGCROP { $$ = PFRULE_FRAGCROP; } 778 | FRAGMENT FRAGDROP { $$ = PFRULE_FRAGDROP; } 779 ; 780 781antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 782 struct pf_rule r; 783 struct node_host *h = NULL; 784 struct node_if *i, *j; 785 786 if (check_rulestate(PFCTL_STATE_FILTER)) 787 YYERROR; 788 789 for (i = $3; i; i = i->next) { 790 bzero(&r, sizeof(r)); 791 792 r.action = PF_DROP; 793 r.direction = PF_IN; 794 r.log = $2.log; 795 r.quick = $2.quick; 796 r.af = $4; 797 if (rule_label(&r, $5.label)) 798 YYERROR; 799 j = calloc(1, sizeof(struct node_if)); 800 if (j == NULL) 801 err(1, "antispoof: calloc"); 802 if (strlcpy(j->ifname, i->ifname, 803 sizeof(j->ifname)) >= sizeof(j->ifname)) { 804 free(j); 805 yyerror("interface name too long"); 806 YYERROR; 807 } 808 j->not = 1; 809 h = ifa_lookup(j->ifname, PFCTL_IFLOOKUP_NET); 810 811 expand_rule(&r, j, NULL, NULL, NULL, h, NULL, 812 NULL, NULL, NULL, NULL, NULL); 813 814 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 815 bzero(&r, sizeof(r)); 816 817 r.action = PF_DROP; 818 r.direction = PF_IN; 819 r.log = $2.log; 820 r.quick = $2.quick; 821 r.af = $4; 822 if (rule_label(&r, $5.label)) 823 YYERROR; 824 h = ifa_lookup(i->ifname, 825 PFCTL_IFLOOKUP_HOST); 826 expand_rule(&r, NULL, NULL, NULL, NULL, 827 h, NULL, NULL, NULL, NULL, NULL, 828 NULL); 829 } 830 } 831 free($5.label); 832 } 833 ; 834 835antispoof_ifspc : FOR if_item { $$ = $2; } 836 | FOR '{' antispoof_iflst '}' { $$ = $3; } 837 ; 838 839antispoof_iflst : if_item { $$ = $1; } 840 | antispoof_iflst comma if_item { 841 $1->tail->next = $3; 842 $1->tail = $3; 843 $$ = $1; 844 } 845 ; 846 847antispoof_opts : { bzero(&antispoof_opts, sizeof antispoof_opts); } 848 antispoof_opts_l 849 { $$ = antispoof_opts; } 850 | /* empty */ { 851 bzero(&antispoof_opts, sizeof antispoof_opts); 852 $$ = antispoof_opts; 853 } 854 ; 855 856antispoof_opts_l : antispoof_opts_l antispoof_opt 857 | antispoof_opt 858 ; 859 860antispoof_opt : label { 861 if (antispoof_opts.label) { 862 yyerror("label cannot be redefined"); 863 YYERROR; 864 } 865 antispoof_opts.label = $1; 866 } 867 ; 868 869not : '!' { $$ = 1; } 870 | /* empty */ { $$ = 0; } 871 872tabledef : TABLE '<' STRING '>' table_opts { 873 struct node_host *h, *nh; 874 struct node_tinit *ti, *nti; 875 876 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 877 yyerror("table name too long, max %d chars", 878 PF_TABLE_NAME_SIZE - 1); 879 YYERROR; 880 } 881 if (pf->loadopt & PFCTL_FLAG_TABLE) 882 if (process_tabledef($3, &$5)) 883 YYERROR; 884 for (ti = SIMPLEQ_FIRST(&$5.init_nodes); 885 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) { 886 if (ti->file) 887 free(ti->file); 888 for (h = ti->host; h != NULL; h = nh) { 889 nh = h->next; 890 free(h); 891 } 892 nti = SIMPLEQ_NEXT(ti, entries); 893 free (ti); 894 } 895 } 896 ; 897 898table_opts : { 899 bzero(&table_opts, sizeof table_opts); 900 SIMPLEQ_INIT(&table_opts.init_nodes); 901 } 902 table_opts_l 903 { $$ = table_opts; } 904 | /* empty */ 905 { 906 bzero(&table_opts, sizeof table_opts); 907 SIMPLEQ_INIT(&table_opts.init_nodes); 908 $$ = table_opts; 909 } 910 ; 911 912table_opts_l : table_opts_l table_opt 913 | table_opt 914 ; 915 916table_opt : STRING { 917 if (!strcmp($1, "const")) 918 table_opts.flags |= PFR_TFLAG_CONST; 919 else if (!strcmp($1, "persist")) 920 table_opts.flags |= PFR_TFLAG_PERSIST; 921 else 922 YYERROR; 923 } 924 | '{' '}' { table_opts.init_addr = 1; } 925 | '{' host_list '}' { 926 struct node_host *n; 927 struct node_tinit *ti; 928 929 for (n = $2; n != NULL; n = n->next) { 930 switch(n->addr.type) { 931 case PF_ADDR_ADDRMASK: 932 continue; /* ok */ 933 case PF_ADDR_DYNIFTL: 934 yyerror("dynamic addresses are not " 935 "permitted inside tables"); 936 break; 937 case PF_ADDR_TABLE: 938 yyerror("tables cannot contain tables"); 939 break; 940 case PF_ADDR_NOROUTE: 941 yyerror("\"no-route\" is not permitted " 942 "inside tables"); 943 break; 944 default: 945 yyerror("unknown address type %d", 946 n->addr.type); 947 } 948 YYERROR; 949 } 950 if (!(ti = calloc(1, sizeof(*ti)))) 951 err(1, "table_opt: calloc"); 952 ti->host = $2; 953 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 954 entries); 955 table_opts.init_addr = 1; 956 } 957 | FILENAME STRING { 958 struct node_tinit *ti; 959 960 if (!(ti = calloc(1, sizeof(*ti)))) 961 err(1, "table_opt: calloc"); 962 ti->file = $2; 963 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 964 entries); 965 table_opts.init_addr = 1; 966 } 967 ; 968 969altqif : ALTQ interface queue_opts QUEUE qassign { 970 struct pf_altq a; 971 972 if (check_rulestate(PFCTL_STATE_QUEUE)) 973 YYERROR; 974 975 memset(&a, 0, sizeof(a)); 976 if ($3.scheduler.qtype == ALTQT_NONE) { 977 yyerror("no scheduler specified!"); 978 YYERROR; 979 } 980 a.scheduler = $3.scheduler.qtype; 981 a.qlimit = $3.qlimit; 982 a.tbrsize = $3.tbrsize; 983 if ($5 == NULL) { 984 yyerror("no child queues specified"); 985 YYERROR; 986 } 987 if (expand_altq(&a, $2, $5, $3.queue_bwspec, 988 &$3.scheduler)) 989 YYERROR; 990 } 991 ; 992 993queuespec : QUEUE STRING interface queue_opts qassign { 994 struct pf_altq a; 995 996 if (check_rulestate(PFCTL_STATE_QUEUE)) 997 YYERROR; 998 999 memset(&a, 0, sizeof(a)); 1000 1001 if (strlcpy(a.qname, $2, sizeof(a.qname)) >= 1002 sizeof(a.qname)) { 1003 yyerror("queue name too long (max " 1004 "%d chars)", PF_QNAME_SIZE-1); 1005 YYERROR; 1006 } 1007 if ($4.tbrsize) { 1008 yyerror("cannot specify tbrsize for queue"); 1009 YYERROR; 1010 } 1011 if ($4.priority > 255) { 1012 yyerror("priority out of range: max 255"); 1013 YYERROR; 1014 } 1015 a.priority = $4.priority; 1016 a.qlimit = $4.qlimit; 1017 a.scheduler = $4.scheduler.qtype; 1018 if (expand_queue(&a, $3, $5, $4.queue_bwspec, 1019 &$4.scheduler)) { 1020 yyerror("errors in queue definition"); 1021 YYERROR; 1022 } 1023 } 1024 ; 1025 1026queue_opts : { 1027 bzero(&queue_opts, sizeof queue_opts); 1028 queue_opts.priority = DEFAULT_PRIORITY; 1029 queue_opts.qlimit = DEFAULT_QLIMIT; 1030 queue_opts.scheduler.qtype = ALTQT_NONE; 1031 queue_opts.queue_bwspec.bw_percent = 100; 1032 } 1033 queue_opts_l 1034 { $$ = queue_opts; } 1035 | /* empty */ { 1036 bzero(&queue_opts, sizeof queue_opts); 1037 queue_opts.priority = DEFAULT_PRIORITY; 1038 queue_opts.qlimit = DEFAULT_QLIMIT; 1039 queue_opts.scheduler.qtype = ALTQT_NONE; 1040 queue_opts.queue_bwspec.bw_percent = 100; 1041 $$ = queue_opts; 1042 } 1043 ; 1044 1045queue_opts_l : queue_opts_l queue_opt 1046 | queue_opt 1047 ; 1048 1049queue_opt : BANDWIDTH bandwidth { 1050 if (queue_opts.marker & QOM_BWSPEC) { 1051 yyerror("bandwidth cannot be respecified"); 1052 YYERROR; 1053 } 1054 queue_opts.marker |= QOM_BWSPEC; 1055 queue_opts.queue_bwspec = $2; 1056 } 1057 | PRIORITY number { 1058 if (queue_opts.marker & QOM_PRIORITY) { 1059 yyerror("priority cannot be respecified"); 1060 YYERROR; 1061 } 1062 if ($2 > 255) { 1063 yyerror("priority out of range: max 255"); 1064 YYERROR; 1065 } 1066 queue_opts.marker |= QOM_PRIORITY; 1067 queue_opts.priority = $2; 1068 } 1069 | QLIMIT number { 1070 if (queue_opts.marker & QOM_QLIMIT) { 1071 yyerror("qlimit cannot be respecified"); 1072 YYERROR; 1073 } 1074 if ($2 > 65535) { 1075 yyerror("qlimit out of range: max 65535"); 1076 YYERROR; 1077 } 1078 queue_opts.marker |= QOM_QLIMIT; 1079 queue_opts.qlimit = $2; 1080 } 1081 | scheduler { 1082 if (queue_opts.marker & QOM_SCHEDULER) { 1083 yyerror("scheduler cannot be respecified"); 1084 YYERROR; 1085 } 1086 queue_opts.marker |= QOM_SCHEDULER; 1087 queue_opts.scheduler = $1; 1088 } 1089 | TBRSIZE number { 1090 if (queue_opts.marker & QOM_TBRSIZE) { 1091 yyerror("tbrsize cannot be respecified"); 1092 YYERROR; 1093 } 1094 if ($2 > 65535) { 1095 yyerror("tbrsize too big: max 65535"); 1096 YYERROR; 1097 } 1098 queue_opts.marker |= QOM_TBRSIZE; 1099 queue_opts.tbrsize = $2; 1100 } 1101 ; 1102 1103bandwidth : STRING { 1104 double bps; 1105 char *cp; 1106 1107 $$.bw_percent = 0; 1108 1109 bps = strtod($1, &cp); 1110 if (cp != NULL) { 1111 if (!strcmp(cp, "b")) 1112 ; /* nothing */ 1113 else if (!strcmp(cp, "Kb")) 1114 bps *= 1000; 1115 else if (!strcmp(cp, "Mb")) 1116 bps *= 1000 * 1000; 1117 else if (!strcmp(cp, "Gb")) 1118 bps *= 1000 * 1000 * 1000; 1119 else if (!strcmp(cp, "%")) { 1120 if (bps < 0 || bps > 100) { 1121 yyerror("bandwidth spec " 1122 "out of range"); 1123 YYERROR; 1124 } 1125 $$.bw_percent = bps; 1126 bps = 0; 1127 } else { 1128 yyerror("unknown unit %s", cp); 1129 YYERROR; 1130 } 1131 } 1132 $$.bw_absolute = (u_int32_t)bps; 1133 } 1134 1135scheduler : CBQ { 1136 $$.qtype = ALTQT_CBQ; 1137 $$.data.cbq_opts.flags = 0; 1138 } 1139 | CBQ '(' cbqflags_list ')' { 1140 $$.qtype = ALTQT_CBQ; 1141 $$.data.cbq_opts.flags = $3; 1142 } 1143 | PRIQ { 1144 $$.qtype = ALTQT_PRIQ; 1145 $$.data.priq_opts.flags = 0; 1146 } 1147 | PRIQ '(' priqflags_list ')' { 1148 $$.qtype = ALTQT_PRIQ; 1149 $$.data.priq_opts.flags = $3; 1150 } 1151 | HFSC { 1152 $$.qtype = ALTQT_HFSC; 1153 bzero(&$$.data.hfsc_opts, 1154 sizeof(struct node_hfsc_opts)); 1155 } 1156 | HFSC '(' hfsc_opts ')' { 1157 $$.qtype = ALTQT_HFSC; 1158 $$.data.hfsc_opts = $3; 1159 } 1160 ; 1161 1162cbqflags_list : cbqflags_item { $$ |= $1; } 1163 | cbqflags_list comma cbqflags_item { $$ |= $3; } 1164 ; 1165 1166cbqflags_item : STRING { 1167 if (!strcmp($1, "default")) 1168 $$ = CBQCLF_DEFCLASS; 1169 else if (!strcmp($1, "borrow")) 1170 $$ = CBQCLF_BORROW; 1171 else if (!strcmp($1, "red")) 1172 $$ = CBQCLF_RED; 1173 else if (!strcmp($1, "ecn")) 1174 $$ = CBQCLF_RED|CBQCLF_ECN; 1175 else if (!strcmp($1, "rio")) 1176 $$ = CBQCLF_RIO; 1177 else { 1178 yyerror("unknown cbq flag \"%s\"", $1); 1179 YYERROR; 1180 } 1181 } 1182 ; 1183 1184priqflags_list : priqflags_item { $$ |= $1; } 1185 | priqflags_list comma priqflags_item { $$ |= $3; } 1186 ; 1187 1188priqflags_item : STRING { 1189 if (!strcmp($1, "default")) 1190 $$ = PRCF_DEFAULTCLASS; 1191 else if (!strcmp($1, "red")) 1192 $$ = PRCF_RED; 1193 else if (!strcmp($1, "ecn")) 1194 $$ = PRCF_RED|PRCF_ECN; 1195 else if (!strcmp($1, "rio")) 1196 $$ = PRCF_RIO; 1197 else { 1198 yyerror("unknown priq flag \"%s\"", $1); 1199 YYERROR; 1200 } 1201 } 1202 ; 1203 1204hfsc_opts : { 1205 bzero(&hfsc_opts, 1206 sizeof(struct node_hfsc_opts)); 1207 } 1208 hfscopts_list { 1209 $$ = hfsc_opts; 1210 } 1211 ; 1212 1213hfscopts_list : hfscopts_item 1214 | hfscopts_list comma hfscopts_item 1215 ; 1216 1217hfscopts_item : LINKSHARE bandwidth { 1218 if (hfsc_opts.linkshare.used) { 1219 yyerror("linkshare already specified"); 1220 YYERROR; 1221 } 1222 hfsc_opts.linkshare.m2 = $2; 1223 hfsc_opts.linkshare.used = 1; 1224 } 1225 | LINKSHARE '(' bandwidth number bandwidth ')' { 1226 if (hfsc_opts.linkshare.used) { 1227 yyerror("linkshare already specified"); 1228 YYERROR; 1229 } 1230 hfsc_opts.linkshare.m1 = $3; 1231 hfsc_opts.linkshare.d = $4; 1232 hfsc_opts.linkshare.m2 = $5; 1233 hfsc_opts.linkshare.used = 1; 1234 } 1235 | REALTIME bandwidth { 1236 if (hfsc_opts.realtime.used) { 1237 yyerror("realtime already specified"); 1238 YYERROR; 1239 } 1240 hfsc_opts.realtime.m2 = $2; 1241 hfsc_opts.realtime.used = 1; 1242 } 1243 | REALTIME '(' bandwidth number bandwidth ')' { 1244 if (hfsc_opts.realtime.used) { 1245 yyerror("realtime already specified"); 1246 YYERROR; 1247 } 1248 hfsc_opts.realtime.m1 = $3; 1249 hfsc_opts.realtime.d = $4; 1250 hfsc_opts.realtime.m2 = $5; 1251 hfsc_opts.realtime.used = 1; 1252 } 1253 | UPPERLIMIT bandwidth { 1254 if (hfsc_opts.upperlimit.used) { 1255 yyerror("upperlimit already specified"); 1256 YYERROR; 1257 } 1258 hfsc_opts.upperlimit.m2 = $2; 1259 hfsc_opts.upperlimit.used = 1; 1260 } 1261 | UPPERLIMIT '(' bandwidth number bandwidth ')' { 1262 if (hfsc_opts.upperlimit.used) { 1263 yyerror("upperlimit already specified"); 1264 YYERROR; 1265 } 1266 hfsc_opts.upperlimit.m1 = $3; 1267 hfsc_opts.upperlimit.d = $4; 1268 hfsc_opts.upperlimit.m2 = $5; 1269 hfsc_opts.upperlimit.used = 1; 1270 } 1271 | STRING { 1272 if (!strcmp($1, "default")) 1273 hfsc_opts.flags |= HFCF_DEFAULTCLASS; 1274 else if (!strcmp($1, "red")) 1275 hfsc_opts.flags |= HFCF_RED; 1276 else if (!strcmp($1, "ecn")) 1277 hfsc_opts.flags |= HFCF_RED|HFCF_ECN; 1278 else if (!strcmp($1, "rio")) 1279 hfsc_opts.flags |= HFCF_RIO; 1280 else { 1281 yyerror("unknown hfsc flag \"%s\"", $1); 1282 YYERROR; 1283 } 1284 } 1285 ; 1286 1287qassign : /* empty */ { $$ = NULL; } 1288 | qassign_item { $$ = $1; } 1289 | '{' qassign_list '}' { $$ = $2; } 1290 ; 1291 1292qassign_list : qassign_item { $$ = $1; } 1293 | qassign_list comma qassign_item { 1294 $1->tail->next = $3; 1295 $1->tail = $3; 1296 $$ = $1; 1297 } 1298 ; 1299 1300qassign_item : STRING { 1301 $$ = calloc(1, sizeof(struct node_queue)); 1302 if ($$ == NULL) 1303 err(1, "qassign_item: calloc"); 1304 if (strlcpy($$->queue, $1, sizeof($$->queue)) >= 1305 sizeof($$->queue)) { 1306 free($$); 1307 yyerror("queue name '%s' too long (max " 1308 "%d chars)", $1, sizeof($$->queue)-1); 1309 YYERROR; 1310 } 1311 $$->next = NULL; 1312 $$->tail = $$; 1313 } 1314 ; 1315 1316pfrule : action dir logquick interface route af proto fromto 1317 filter_opts 1318 { 1319 struct pf_rule r; 1320 struct node_state_opt *o; 1321 struct node_proto *proto; 1322 1323 if (check_rulestate(PFCTL_STATE_FILTER)) 1324 YYERROR; 1325 1326 memset(&r, 0, sizeof(r)); 1327 1328 r.action = $1.b1; 1329 switch ($1.b2) { 1330 case PFRULE_RETURNRST: 1331 r.rule_flag |= PFRULE_RETURNRST; 1332 r.return_ttl = $1.w; 1333 break; 1334 case PFRULE_RETURNICMP: 1335 r.rule_flag |= PFRULE_RETURNICMP; 1336 r.return_icmp = $1.w; 1337 r.return_icmp6 = $1.w2; 1338 break; 1339 case PFRULE_RETURN: 1340 r.rule_flag |= PFRULE_RETURN; 1341 r.return_icmp = $1.w; 1342 r.return_icmp6 = $1.w2; 1343 break; 1344 } 1345 r.direction = $2; 1346 r.log = $3.log; 1347 r.quick = $3.quick; 1348 1349 r.af = $6; 1350 if ($9.tag) 1351 if (strlcpy(r.tagname, $9.tag, 1352 PF_TAG_NAME_SIZE) > PF_TAG_NAME_SIZE) { 1353 yyerror("tag too long, max %u chars", 1354 PF_TAG_NAME_SIZE - 1); 1355 YYERROR; 1356 } 1357 if ($9.match_tag) 1358 if (strlcpy(r.match_tagname, $9.match_tag, 1359 PF_TAG_NAME_SIZE) > PF_TAG_NAME_SIZE) { 1360 yyerror("tag too long, max %u chars", 1361 PF_TAG_NAME_SIZE - 1); 1362 YYERROR; 1363 } 1364 r.match_tag_not = $9.match_tag_not; 1365 r.flags = $9.flags.b1; 1366 r.flagset = $9.flags.b2; 1367 if (rule_label(&r, $9.label)) 1368 YYERROR; 1369 free($9.label); 1370 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 1371 for (proto = $7; proto != NULL && 1372 proto->proto != IPPROTO_TCP; 1373 proto = proto->next) 1374 ; /* nothing */ 1375 if (proto == NULL && $7 != NULL) { 1376 if ($9.flags.b1 || $9.flags.b2) 1377 yyerror( 1378 "flags only apply to tcp"); 1379 if ($8.src_os) 1380 yyerror( 1381 "OS fingerprinting only " 1382 "apply to tcp"); 1383 YYERROR; 1384 } 1385#if 0 1386 if (($9.flags.b1 & parse_flags("S")) == 0 && 1387 $8.src_os) { 1388 yyerror("OS fingerprinting requires " 1389 "the SYN TCP flag (flags S/SA)"); 1390 YYERROR; 1391 } 1392#endif 1393 } 1394 1395 r.tos = $9.tos; 1396 r.keep_state = $9.keep.action; 1397 o = $9.keep.options; 1398 while (o) { 1399 struct node_state_opt *p = o; 1400 1401 switch (o->type) { 1402 case PF_STATE_OPT_MAX: 1403 if (r.max_states) { 1404 yyerror("state option 'max' " 1405 "multiple definitions"); 1406 YYERROR; 1407 } 1408 r.max_states = o->data.max_states; 1409 break; 1410 case PF_STATE_OPT_TIMEOUT: 1411 if (r.timeout[o->data.timeout.number]) { 1412 yyerror("state timeout %s " 1413 "multiple definitions", 1414 pf_timeouts[o->data. 1415 timeout.number].name); 1416 YYERROR; 1417 } 1418 r.timeout[o->data.timeout.number] = 1419 o->data.timeout.seconds; 1420 } 1421 o = o->next; 1422 free(p); 1423 } 1424 1425 if ($9.fragment) 1426 r.rule_flag |= PFRULE_FRAGMENT; 1427 r.allow_opts = $9.allowopts; 1428 1429 decide_address_family($8.src.host, &r.af); 1430 decide_address_family($8.dst.host, &r.af); 1431 1432 if ($5.rt) { 1433 if (!r.direction) { 1434 yyerror("direction must be explicit " 1435 "with rules that specify routing"); 1436 YYERROR; 1437 } 1438 r.rt = $5.rt; 1439 r.rpool.opts = $5.pool_opts; 1440 if ($5.key != NULL) 1441 memcpy(&r.rpool.key, $5.key, 1442 sizeof(struct pf_poolhashkey)); 1443 } 1444 if (r.rt && r.rt != PF_FASTROUTE) { 1445 decide_address_family($5.host, &r.af); 1446 remove_invalid_hosts(&$5.host, &r.af); 1447 if ($5.host == NULL) { 1448 yyerror("no routing address with " 1449 "matching address family found."); 1450 YYERROR; 1451 } 1452 if (r.rpool.opts == PF_POOL_NONE && ( 1453 $5.host->next != NULL || 1454 $5.host->addr.type == PF_ADDR_TABLE)) 1455 r.rpool.opts = PF_POOL_ROUNDROBIN; 1456 if (r.rpool.opts != PF_POOL_ROUNDROBIN) 1457 if (disallow_table($5.host, "tables " 1458 "are only supported in round-robin " 1459 "routing pools")) 1460 YYERROR; 1461 if ($5.host->next != NULL) { 1462 if (r.rpool.opts != 1463 PF_POOL_ROUNDROBIN) { 1464 yyerror("r.rpool.opts must " 1465 "be PF_POOL_ROUNDROBIN"); 1466 YYERROR; 1467 } 1468 } 1469 } 1470 if ($9.queues.qname != NULL) { 1471 if (strlcpy(r.qname, $9.queues.qname, 1472 sizeof(r.qname)) >= sizeof(r.qname)) { 1473 yyerror("rule qname too long (max " 1474 "%d chars)", sizeof(r.qname)-1); 1475 YYERROR; 1476 } 1477 free($9.queues.qname); 1478 } 1479 if ($9.queues.pqname != NULL) { 1480 if (strlcpy(r.pqname, $9.queues.pqname, 1481 sizeof(r.pqname)) >= sizeof(r.pqname)) { 1482 yyerror("rule pqname too long (max " 1483 "%d chars)", sizeof(r.pqname)-1); 1484 YYERROR; 1485 } 1486 free($9.queues.pqname); 1487 } 1488 1489 expand_rule(&r, $4, $5.host, $7, $8.src_os, 1490 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 1491 $9.uid, $9.gid, $9.icmpspec); 1492 } 1493 ; 1494 1495filter_opts : { bzero(&filter_opts, sizeof filter_opts); } 1496 filter_opts_l 1497 { $$ = filter_opts; } 1498 | /* empty */ { 1499 bzero(&filter_opts, sizeof filter_opts); 1500 $$ = filter_opts; 1501 } 1502 ; 1503 1504filter_opts_l : filter_opts_l filter_opt 1505 | filter_opt 1506 ; 1507 1508filter_opt : USER uids { 1509 if (filter_opts.uid) 1510 $2->tail->next = filter_opts.uid; 1511 filter_opts.uid = $2; 1512 } 1513 | GROUP gids { 1514 if (filter_opts.gid) 1515 $2->tail->next = filter_opts.gid; 1516 filter_opts.gid = $2; 1517 } 1518 | flags { 1519 if (filter_opts.marker & FOM_FLAGS) { 1520 yyerror("flags cannot be redefined"); 1521 YYERROR; 1522 } 1523 filter_opts.marker |= FOM_FLAGS; 1524 filter_opts.flags.b1 |= $1.b1; 1525 filter_opts.flags.b2 |= $1.b2; 1526 filter_opts.flags.w |= $1.w; 1527 filter_opts.flags.w2 |= $1.w2; 1528 } 1529 | icmpspec { 1530 if (filter_opts.marker & FOM_ICMP) { 1531 yyerror("icmp-type cannot be redefined"); 1532 YYERROR; 1533 } 1534 filter_opts.marker |= FOM_ICMP; 1535 filter_opts.icmpspec = $1; 1536 } 1537 | tos { 1538 if (filter_opts.marker & FOM_TOS) { 1539 yyerror("tos cannot be redefined"); 1540 YYERROR; 1541 } 1542 filter_opts.marker |= FOM_TOS; 1543 filter_opts.tos = $1; 1544 } 1545 | keep { 1546 if (filter_opts.marker & FOM_KEEP) { 1547 yyerror("modulate or keep cannot be redefined"); 1548 YYERROR; 1549 } 1550 filter_opts.marker |= FOM_KEEP; 1551 filter_opts.keep.action = $1.action; 1552 filter_opts.keep.options = $1.options; 1553 } 1554 | FRAGMENT { 1555 filter_opts.fragment = 1; 1556 } 1557 | ALLOWOPTS { 1558 filter_opts.allowopts = 1; 1559 } 1560 | label { 1561 if (filter_opts.label) { 1562 yyerror("label cannot be redefined"); 1563 YYERROR; 1564 } 1565 filter_opts.label = $1; 1566 } 1567 | qname { 1568 if (filter_opts.queues.qname) { 1569 yyerror("queue cannot be redefined"); 1570 YYERROR; 1571 } 1572 filter_opts.queues = $1; 1573 } 1574 | TAG string { 1575 filter_opts.tag = $2; 1576 } 1577 | not TAGGED string { 1578 filter_opts.match_tag = $3; 1579 filter_opts.match_tag_not = $1; 1580 } 1581 ; 1582 1583action : PASS { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; } 1584 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 1585 ; 1586 1587blockspec : /* empty */ { 1588 $$.b2 = blockpolicy; 1589 $$.w = returnicmpdefault; 1590 $$.w2 = returnicmp6default; 1591 } 1592 | DROP { 1593 $$.b2 = PFRULE_DROP; 1594 $$.w = 0; 1595 $$.w2 = 0; 1596 } 1597 | RETURNRST { 1598 $$.b2 = PFRULE_RETURNRST; 1599 $$.w = 0; 1600 $$.w2 = 0; 1601 } 1602 | RETURNRST '(' TTL number ')' { 1603 if ($4 > 255) { 1604 yyerror("illegal ttl value %d", $4); 1605 YYERROR; 1606 } 1607 $$.b2 = PFRULE_RETURNRST; 1608 $$.w = $4; 1609 $$.w2 = 0; 1610 } 1611 | RETURNICMP { 1612 $$.b2 = PFRULE_RETURNICMP; 1613 $$.w = returnicmpdefault; 1614 $$.w2 = returnicmp6default; 1615 } 1616 | RETURNICMP6 { 1617 $$.b2 = PFRULE_RETURNICMP; 1618 $$.w = returnicmpdefault; 1619 $$.w2 = returnicmp6default; 1620 } 1621 | RETURNICMP '(' STRING ')' { 1622 $$.b2 = PFRULE_RETURNICMP; 1623 if (!($$.w = parseicmpspec($3, AF_INET))) 1624 YYERROR; 1625 $$.w2 = returnicmp6default; 1626 } 1627 | RETURNICMP6 '(' STRING ')' { 1628 $$.b2 = PFRULE_RETURNICMP; 1629 $$.w = returnicmpdefault; 1630 if (!($$.w2 = parseicmpspec($3, AF_INET6))) 1631 YYERROR; 1632 } 1633 | RETURNICMP '(' STRING comma STRING ')' { 1634 $$.b2 = PFRULE_RETURNICMP; 1635 if (!($$.w = parseicmpspec($3, AF_INET))) 1636 YYERROR; 1637 if (!($$.w2 = parseicmpspec($5, AF_INET6))) 1638 YYERROR; 1639 } 1640 | RETURN { 1641 $$.b2 = PFRULE_RETURN; 1642 $$.w = returnicmpdefault; 1643 $$.w2 = returnicmp6default; 1644 } 1645 ; 1646 1647dir : /* empty */ { $$ = 0; } 1648 | IN { $$ = PF_IN; } 1649 | OUT { $$ = PF_OUT; } 1650 ; 1651 1652logquick : /* empty */ { $$.log = 0; $$.quick = 0; } 1653 | log { $$.log = $1; $$.quick = 0; } 1654 | QUICK { $$.log = 0; $$.quick = 1; } 1655 | log QUICK { $$.log = $1; $$.quick = 1; } 1656 | QUICK log { $$.log = $2; $$.quick = 1; } 1657 ; 1658 1659log : LOG { $$ = 1; } 1660 | LOGALL { $$ = 2; } 1661 ; 1662 1663interface : /* empty */ { $$ = NULL; } 1664 | ON if_item_not { $$ = $2; } 1665 | ON '{' if_list '}' { $$ = $3; } 1666 ; 1667 1668if_list : if_item_not { $$ = $1; } 1669 | if_list comma if_item_not { 1670 $1->tail->next = $3; 1671 $1->tail = $3; 1672 $$ = $1; 1673 } 1674 ; 1675 1676if_item_not : not if_item { $$ = $2; $$->not = $1; } 1677 ; 1678 1679if_item : STRING { 1680 struct node_host *n; 1681 1682 if ((n = ifa_exists($1)) == NULL) { 1683 yyerror("unknown interface %s", $1); 1684 YYERROR; 1685 } 1686 $$ = calloc(1, sizeof(struct node_if)); 1687 if ($$ == NULL) 1688 err(1, "if_item: calloc"); 1689 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 1690 sizeof($$->ifname)) { 1691 free($$); 1692 yyerror("interface name too long"); 1693 YYERROR; 1694 } 1695 $$->ifa_flags = n->ifa_flags; 1696 $$->not = 0; 1697 $$->next = NULL; 1698 $$->tail = $$; 1699 } 1700 ; 1701 1702af : /* empty */ { $$ = 0; } 1703 | INET { $$ = AF_INET; } 1704 | INET6 { $$ = AF_INET6; } 1705 1706proto : /* empty */ { $$ = NULL; } 1707 | PROTO proto_item { $$ = $2; } 1708 | PROTO '{' proto_list '}' { $$ = $3; } 1709 ; 1710 1711proto_list : proto_item { $$ = $1; } 1712 | proto_list comma proto_item { 1713 $1->tail->next = $3; 1714 $1->tail = $3; 1715 $$ = $1; 1716 } 1717 ; 1718 1719proto_item : STRING { 1720 u_int8_t pr; 1721 u_long ulval; 1722 1723 if (atoul($1, &ulval) == 0) { 1724 if (ulval > 255) { 1725 yyerror("protocol outside range"); 1726 YYERROR; 1727 } 1728 pr = (u_int8_t)ulval; 1729 } else { 1730 struct protoent *p; 1731 1732 p = getprotobyname($1); 1733 if (p == NULL) { 1734 yyerror("unknown protocol %s", $1); 1735 YYERROR; 1736 } 1737 pr = p->p_proto; 1738 } 1739 if (pr == 0) { 1740 yyerror("proto 0 cannot be used"); 1741 YYERROR; 1742 } 1743 $$ = calloc(1, sizeof(struct node_proto)); 1744 if ($$ == NULL) 1745 err(1, "proto_item: calloc"); 1746 $$->proto = pr; 1747 $$->next = NULL; 1748 $$->tail = $$; 1749 } 1750 ; 1751 1752fromto : ALL { 1753 $$.src.host = NULL; 1754 $$.src.port = NULL; 1755 $$.dst.host = NULL; 1756 $$.dst.port = NULL; 1757 $$.src_os = NULL; 1758 } 1759 | from os to { 1760 $$.src = $1; 1761 $$.src_os = $2; 1762 $$.dst = $3; 1763 } 1764 ; 1765 1766os : /* empty */ { $$ = NULL; } 1767 | OS xos { $$ = $2; } 1768 | OS '{' os_list '}' { $$ = $3; } 1769 ; 1770 1771xos : STRING { 1772 $$ = calloc(1, sizeof(struct node_os)); 1773 if ($$ == NULL) 1774 err(1, "os: calloc"); 1775 $$->os = $1; 1776 $$->tail = $$; 1777 } 1778 ; 1779 1780os_list : xos { $$ = $1; } 1781 | os_list comma xos { 1782 $1->tail->next = $3; 1783 $1->tail = $3; 1784 $$ = $1; 1785 } 1786 ; 1787 1788from : /* empty */ { 1789 $$.host = NULL; 1790 $$.port = NULL; 1791 } 1792 | FROM ipportspec { 1793 $$ = $2; 1794 } 1795 ; 1796 1797to : /* empty */ { 1798 $$.host = NULL; 1799 $$.port = NULL; 1800 } 1801 | TO ipportspec { 1802 $$ = $2; 1803 } 1804 ; 1805 1806ipportspec : ipspec { 1807 $$.host = $1; 1808 $$.port = NULL; 1809 } 1810 | ipspec PORT portspec { 1811 $$.host = $1; 1812 $$.port = $3; 1813 } 1814 | PORT portspec { 1815 $$.host = NULL; 1816 $$.port = $2; 1817 } 1818 ; 1819 1820ipspec : ANY { $$ = NULL; } 1821 | xhost { $$ = $1; } 1822 | '{' host_list '}' { $$ = $2; } 1823 ; 1824 1825host_list : xhost { $$ = $1; } 1826 | host_list comma xhost { 1827 if ($3 == NULL) 1828 $$ = $1; 1829 else if ($1 == NULL) 1830 $$ = $3; 1831 else { 1832 $1->tail->next = $3; 1833 $1->tail = $3->tail; 1834 $$ = $1; 1835 } 1836 } 1837 ; 1838 1839xhost : not host { 1840 struct node_host *n; 1841 1842 for (n = $2; n != NULL; n = n->next) 1843 n->not = $1; 1844 $$ = $2; 1845 } 1846 | NOROUTE { 1847 $$ = calloc(1, sizeof(struct node_host)); 1848 if ($$ == NULL) 1849 err(1, "xhost: calloc"); 1850 $$->addr.type = PF_ADDR_NOROUTE; 1851 $$->next = NULL; 1852 $$->tail = $$; 1853 } 1854 ; 1855 1856host : STRING { 1857 if (($$ = host($1)) == NULL) { 1858 /* error. "any" is handled elsewhere */ 1859 yyerror("could not parse host specification"); 1860 YYERROR; 1861 } 1862 1863 } 1864 | STRING '/' number { 1865 char *buf; 1866 1867 if (asprintf(&buf, "%s/%u", $1, $3) == -1) 1868 err(1, "host: asprintf"); 1869 if (($$ = host(buf)) == NULL) { 1870 /* error. "any" is handled elsewhere */ 1871 free(buf); 1872 yyerror("could not parse host specification"); 1873 YYERROR; 1874 } 1875 free(buf); 1876 } 1877 | dynaddr 1878 | dynaddr '/' number { 1879 struct node_host *n; 1880 1881 $$ = $1; 1882 for (n = $1; n != NULL; n = n->next) 1883 set_ipmask(n, $3); 1884 } 1885 | '<' STRING '>' { 1886 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 1887 yyerror("table name '%s' too long"); 1888 YYERROR; 1889 } 1890 $$ = calloc(1, sizeof(struct node_host)); 1891 if ($$ == NULL) 1892 err(1, "host: calloc"); 1893 $$->addr.type = PF_ADDR_TABLE; 1894 if (strlcpy($$->addr.v.tblname, $2, 1895 sizeof($$->addr.v.tblname)) >= 1896 sizeof($$->addr.v.tblname)) 1897 errx(1, "host: strlcpy"); 1898 $$->next = NULL; 1899 $$->tail = $$; 1900 } 1901 ; 1902 1903number : STRING { 1904 u_long ulval; 1905 1906 if (atoul($1, &ulval) == -1) { 1907 yyerror("%s is not a number", $1); 1908 YYERROR; 1909 } else 1910 $$ = ulval; 1911 } 1912 ; 1913 1914dynaddr : '(' STRING ')' { 1915 if (ifa_exists($2) == NULL) { 1916 yyerror("interface %s does not exist", $2); 1917 YYERROR; 1918 } 1919 $$ = calloc(1, sizeof(struct node_host)); 1920 if ($$ == NULL) 1921 err(1, "address: calloc"); 1922 $$->af = 0; 1923 set_ipmask($$, 128); 1924 $$->addr.type = PF_ADDR_DYNIFTL; 1925 if (strlcpy($$->addr.v.ifname, $2, 1926 sizeof($$->addr.v.ifname)) >= 1927 sizeof($$->addr.v.ifname)) { 1928 free($$); 1929 yyerror("interface name too long"); 1930 YYERROR; 1931 } 1932 $$->next = NULL; 1933 $$->tail = $$; 1934 } 1935 ; 1936 1937portspec : port_item { $$ = $1; } 1938 | '{' port_list '}' { $$ = $2; } 1939 ; 1940 1941port_list : port_item { $$ = $1; } 1942 | port_list comma port_item { 1943 $1->tail->next = $3; 1944 $1->tail = $3; 1945 $$ = $1; 1946 } 1947 ; 1948 1949port_item : port { 1950 $$ = calloc(1, sizeof(struct node_port)); 1951 if ($$ == NULL) 1952 err(1, "port_item: calloc"); 1953 $$->port[0] = $1.a; 1954 $$->port[1] = $1.b; 1955 if ($1.t) 1956 $$->op = PF_OP_RRG; 1957 else 1958 $$->op = PF_OP_EQ; 1959 $$->next = NULL; 1960 $$->tail = $$; 1961 } 1962 | unaryop port { 1963 if ($2.t) { 1964 yyerror("':' cannot be used with an other " 1965 "port operator"); 1966 YYERROR; 1967 } 1968 $$ = calloc(1, sizeof(struct node_port)); 1969 if ($$ == NULL) 1970 err(1, "port_item: calloc"); 1971 $$->port[0] = $2.a; 1972 $$->port[1] = $2.b; 1973 $$->op = $1; 1974 $$->next = NULL; 1975 $$->tail = $$; 1976 } 1977 | port PORTBINARY port { 1978 if ($1.t || $3.t) { 1979 yyerror("':' cannot be used with an other " 1980 "port operator"); 1981 YYERROR; 1982 } 1983 $$ = calloc(1, sizeof(struct node_port)); 1984 if ($$ == NULL) 1985 err(1, "port_item: calloc"); 1986 $$->port[0] = $1.a; 1987 $$->port[1] = $3.a; 1988 $$->op = $2; 1989 $$->next = NULL; 1990 $$->tail = $$; 1991 } 1992 ; 1993 1994port : STRING { 1995 char *p = strchr($1, ':'); 1996 struct servent *s = NULL; 1997 u_long ulval; 1998 1999 if (p == NULL) { 2000 if (atoul($1, &ulval) == 0) { 2001 if (ulval > 65535) { 2002 yyerror("illegal port value %d", 2003 ulval); 2004 YYERROR; 2005 } 2006 $$.a = htons(ulval); 2007 } else { 2008 s = getservbyname($1, "tcp"); 2009 if (s == NULL) 2010 s = getservbyname($1, "udp"); 2011 if (s == NULL) { 2012 yyerror("unknown port %s", $1); 2013 YYERROR; 2014 } 2015 $$.a = s->s_port; 2016 } 2017 $$.b = 0; 2018 $$.t = 0; 2019 } else { 2020 int port[2]; 2021 2022 *p++ = 0; 2023 if ((port[0] = getservice($1)) == -1 || 2024 (port[1] = getservice(p)) == -1) 2025 YYERROR; 2026 $$.a = port[0]; 2027 $$.b = port[1]; 2028 $$.t = PF_OP_RRG; 2029 } 2030 } 2031 ; 2032 2033uids : uid_item { $$ = $1; } 2034 | '{' uid_list '}' { $$ = $2; } 2035 ; 2036 2037uid_list : uid_item { $$ = $1; } 2038 | uid_list comma uid_item { 2039 $1->tail->next = $3; 2040 $1->tail = $3; 2041 $$ = $1; 2042 } 2043 ; 2044 2045uid_item : uid { 2046 $$ = calloc(1, sizeof(struct node_uid)); 2047 if ($$ == NULL) 2048 err(1, "uid_item: calloc"); 2049 $$->uid[0] = $1; 2050 $$->uid[1] = $1; 2051 $$->op = PF_OP_EQ; 2052 $$->next = NULL; 2053 $$->tail = $$; 2054 } 2055 | unaryop uid { 2056 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 2057 yyerror("user unknown requires operator = or " 2058 "!="); 2059 YYERROR; 2060 } 2061 $$ = calloc(1, sizeof(struct node_uid)); 2062 if ($$ == NULL) 2063 err(1, "uid_item: calloc"); 2064 $$->uid[0] = $2; 2065 $$->uid[1] = $2; 2066 $$->op = $1; 2067 $$->next = NULL; 2068 $$->tail = $$; 2069 } 2070 | uid PORTBINARY uid { 2071 if ($1 == UID_MAX || $3 == UID_MAX) { 2072 yyerror("user unknown requires operator = or " 2073 "!="); 2074 YYERROR; 2075 } 2076 $$ = calloc(1, sizeof(struct node_uid)); 2077 if ($$ == NULL) 2078 err(1, "uid_item: calloc"); 2079 $$->uid[0] = $1; 2080 $$->uid[1] = $3; 2081 $$->op = $2; 2082 $$->next = NULL; 2083 $$->tail = $$; 2084 } 2085 ; 2086 2087uid : STRING { 2088 u_long ulval; 2089 2090 if (atoul($1, &ulval) == -1) { 2091 if (!strcmp($1, "unknown")) 2092 $$ = UID_MAX; 2093 else { 2094 struct passwd *pw; 2095 2096 if ((pw = getpwnam($1)) == NULL) { 2097 yyerror("unknown user %s", $1); 2098 YYERROR; 2099 } 2100 $$ = pw->pw_uid; 2101 } 2102 } else { 2103 if (ulval >= UID_MAX) { 2104 yyerror("illegal uid value %lu", ulval); 2105 YYERROR; 2106 } 2107 $$ = ulval; 2108 } 2109 } 2110 ; 2111 2112gids : gid_item { $$ = $1; } 2113 | '{' gid_list '}' { $$ = $2; } 2114 ; 2115 2116gid_list : gid_item { $$ = $1; } 2117 | gid_list comma gid_item { 2118 $1->tail->next = $3; 2119 $1->tail = $3; 2120 $$ = $1; 2121 } 2122 ; 2123 2124gid_item : gid { 2125 $$ = calloc(1, sizeof(struct node_gid)); 2126 if ($$ == NULL) 2127 err(1, "gid_item: calloc"); 2128 $$->gid[0] = $1; 2129 $$->gid[1] = $1; 2130 $$->op = PF_OP_EQ; 2131 $$->next = NULL; 2132 $$->tail = $$; 2133 } 2134 | unaryop gid { 2135 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 2136 yyerror("group unknown requires operator = or " 2137 "!="); 2138 YYERROR; 2139 } 2140 $$ = calloc(1, sizeof(struct node_gid)); 2141 if ($$ == NULL) 2142 err(1, "gid_item: calloc"); 2143 $$->gid[0] = $2; 2144 $$->gid[1] = $2; 2145 $$->op = $1; 2146 $$->next = NULL; 2147 $$->tail = $$; 2148 } 2149 | gid PORTBINARY gid { 2150 if ($1 == GID_MAX || $3 == GID_MAX) { 2151 yyerror("group unknown requires operator = or " 2152 "!="); 2153 YYERROR; 2154 } 2155 $$ = calloc(1, sizeof(struct node_gid)); 2156 if ($$ == NULL) 2157 err(1, "gid_item: calloc"); 2158 $$->gid[0] = $1; 2159 $$->gid[1] = $3; 2160 $$->op = $2; 2161 $$->next = NULL; 2162 $$->tail = $$; 2163 } 2164 ; 2165 2166gid : STRING { 2167 u_long ulval; 2168 2169 if (atoul($1, &ulval) == -1) { 2170 if (!strcmp($1, "unknown")) 2171 $$ = GID_MAX; 2172 else { 2173 struct group *grp; 2174 2175 if ((grp = getgrnam($1)) == NULL) { 2176 yyerror("unknown group %s", $1); 2177 YYERROR; 2178 } 2179 $$ = grp->gr_gid; 2180 } 2181 } else { 2182 if (ulval >= GID_MAX) { 2183 yyerror("illegal gid value %lu", ulval); 2184 YYERROR; 2185 } 2186 $$ = ulval; 2187 } 2188 } 2189 ; 2190 2191flag : STRING { 2192 int f; 2193 2194 if ((f = parse_flags($1)) < 0) { 2195 yyerror("bad flags %s", $1); 2196 YYERROR; 2197 } 2198 $$.b1 = f; 2199 } 2200 ; 2201 2202flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 2203 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 2204 ; 2205 2206icmpspec : ICMPTYPE icmp_item { $$ = $2; } 2207 | ICMPTYPE '{' icmp_list '}' { $$ = $3; } 2208 | ICMP6TYPE icmp6_item { $$ = $2; } 2209 | ICMP6TYPE '{' icmp6_list '}' { $$ = $3; } 2210 ; 2211 2212icmp_list : icmp_item { $$ = $1; } 2213 | icmp_list comma icmp_item { 2214 $1->tail->next = $3; 2215 $1->tail = $3; 2216 $$ = $1; 2217 } 2218 ; 2219 2220icmp6_list : icmp6_item { $$ = $1; } 2221 | icmp6_list comma icmp6_item { 2222 $1->tail->next = $3; 2223 $1->tail = $3; 2224 $$ = $1; 2225 } 2226 ; 2227 2228icmp_item : icmptype { 2229 $$ = calloc(1, sizeof(struct node_icmp)); 2230 if ($$ == NULL) 2231 err(1, "icmp_item: calloc"); 2232 $$->type = $1; 2233 $$->code = 0; 2234 $$->proto = IPPROTO_ICMP; 2235 $$->next = NULL; 2236 $$->tail = $$; 2237 } 2238 | icmptype CODE STRING { 2239 const struct icmpcodeent *p; 2240 u_long ulval; 2241 2242 if (atoul($3, &ulval) == 0) { 2243 if (ulval > 255) { 2244 yyerror("illegal icmp-code %d", ulval); 2245 YYERROR; 2246 } 2247 } else { 2248 if ((p = geticmpcodebyname($1-1, $3, 2249 AF_INET)) == NULL) { 2250 yyerror("unknown icmp-code %s", $3); 2251 YYERROR; 2252 } 2253 ulval = p->code; 2254 } 2255 $$ = calloc(1, sizeof(struct node_icmp)); 2256 if ($$ == NULL) 2257 err(1, "icmp_item: calloc"); 2258 $$->type = $1; 2259 $$->code = ulval + 1; 2260 $$->proto = IPPROTO_ICMP; 2261 $$->next = NULL; 2262 $$->tail = $$; 2263 } 2264 ; 2265 2266icmp6_item : icmp6type { 2267 $$ = calloc(1, sizeof(struct node_icmp)); 2268 if ($$ == NULL) 2269 err(1, "icmp_item: calloc"); 2270 $$->type = $1; 2271 $$->code = 0; 2272 $$->proto = IPPROTO_ICMPV6; 2273 $$->next = NULL; 2274 $$->tail = $$; 2275 } 2276 | icmp6type CODE STRING { 2277 const struct icmpcodeent *p; 2278 u_long ulval; 2279 2280 if (atoul($3, &ulval) == 0) { 2281 if (ulval > 255) { 2282 yyerror("illegal icmp6-code %ld", 2283 ulval); 2284 YYERROR; 2285 } 2286 } else { 2287 if ((p = geticmpcodebyname($1-1, $3, 2288 AF_INET6)) == NULL) { 2289 yyerror("unknown icmp6-code %s", $3); 2290 YYERROR; 2291 } 2292 ulval = p->code; 2293 } 2294 $$ = calloc(1, sizeof(struct node_icmp)); 2295 if ($$ == NULL) 2296 err(1, "icmp_item: calloc"); 2297 $$->type = $1; 2298 $$->code = ulval + 1; 2299 $$->proto = IPPROTO_ICMPV6; 2300 $$->next = NULL; 2301 $$->tail = $$; 2302 } 2303 ; 2304 2305icmptype : STRING { 2306 const struct icmptypeent *p; 2307 u_long ulval; 2308 2309 if (atoul($1, &ulval) == 0) { 2310 if (ulval > 255) { 2311 yyerror("illegal icmp-type %d", ulval); 2312 YYERROR; 2313 } 2314 $$ = ulval + 1; 2315 } else { 2316 if ((p = geticmptypebyname($1, AF_INET)) == 2317 NULL) { 2318 yyerror("unknown icmp-type %s", $1); 2319 YYERROR; 2320 } 2321 $$ = p->type + 1; 2322 } 2323 } 2324 ; 2325 2326icmp6type : STRING { 2327 const struct icmptypeent *p; 2328 u_long ulval; 2329 2330 if (atoul($1, &ulval) == 0) { 2331 if (ulval > 255) { 2332 yyerror("illegal icmp6-type %d", ulval); 2333 YYERROR; 2334 } 2335 $$ = ulval + 1; 2336 } else { 2337 if ((p = geticmptypebyname($1, AF_INET6)) == 2338 NULL) { 2339 yyerror("unknown icmp6-type %s", $1); 2340 YYERROR; 2341 } 2342 $$ = p->type + 1; 2343 } 2344 } 2345 ; 2346 2347tos : TOS STRING { 2348 if (!strcmp($2, "lowdelay")) 2349 $$ = IPTOS_LOWDELAY; 2350 else if (!strcmp($2, "throughput")) 2351 $$ = IPTOS_THROUGHPUT; 2352 else if (!strcmp($2, "reliability")) 2353 $$ = IPTOS_RELIABILITY; 2354 else if ($2[0] == '0' && $2[1] == 'x') 2355 $$ = strtoul($2, NULL, 16); 2356 else 2357 $$ = strtoul($2, NULL, 10); 2358 if (!$$ || $$ > 255) { 2359 yyerror("illegal tos value %s", $2); 2360 YYERROR; 2361 } 2362 } 2363 ; 2364 2365keep : KEEP STATE state_opt_spec { 2366 $$.action = PF_STATE_NORMAL; 2367 $$.options = $3; 2368 } 2369 | MODULATE STATE state_opt_spec { 2370 $$.action = PF_STATE_MODULATE; 2371 $$.options = $3; 2372 } 2373 | SYNPROXY STATE state_opt_spec { 2374 $$.action = PF_STATE_SYNPROXY; 2375 $$.options = $3; 2376 } 2377 ; 2378 2379state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 2380 | /* empty */ { $$ = NULL; } 2381 ; 2382 2383state_opt_list : state_opt_item { $$ = $1; } 2384 | state_opt_list comma state_opt_item { 2385 $1->tail->next = $3; 2386 $1->tail = $3; 2387 $$ = $1; 2388 } 2389 ; 2390 2391state_opt_item : MAXIMUM number { 2392 $$ = calloc(1, sizeof(struct node_state_opt)); 2393 if ($$ == NULL) 2394 err(1, "state_opt_item: calloc"); 2395 $$->type = PF_STATE_OPT_MAX; 2396 $$->data.max_states = $2; 2397 $$->next = NULL; 2398 $$->tail = $$; 2399 } 2400 | STRING number { 2401 int i; 2402 2403 for (i = 0; pf_timeouts[i].name && 2404 strcmp(pf_timeouts[i].name, $1); ++i) 2405 ; /* nothing */ 2406 if (!pf_timeouts[i].name) { 2407 yyerror("illegal timeout name %s", $1); 2408 YYERROR; 2409 } 2410 if (strchr(pf_timeouts[i].name, '.') == NULL) { 2411 yyerror("illegal state timeout %s", $1); 2412 YYERROR; 2413 } 2414 $$ = calloc(1, sizeof(struct node_state_opt)); 2415 if ($$ == NULL) 2416 err(1, "state_opt_item: calloc"); 2417 $$->type = PF_STATE_OPT_TIMEOUT; 2418 $$->data.timeout.number = pf_timeouts[i].timeout; 2419 $$->data.timeout.seconds = $2; 2420 $$->next = NULL; 2421 $$->tail = $$; 2422 } 2423 ; 2424 2425label : LABEL STRING { 2426 if (($$ = strdup($2)) == NULL) 2427 err(1, "rule label strdup() failed"); 2428 } 2429 ; 2430 2431qname : QUEUE STRING { 2432 if (($$.qname = strdup($2)) == NULL) 2433 err(1, "qname strdup() failed"); 2434 } 2435 | QUEUE '(' STRING ')' { 2436 if (($$.qname = strdup($3)) == NULL) 2437 err(1, "qname strdup() failed"); 2438 } 2439 | QUEUE '(' STRING comma STRING ')' { 2440 if (($$.qname = strdup($3)) == NULL || 2441 ($$.pqname = strdup($5)) == NULL) 2442 err(1, "qname strdup() failed"); 2443 } 2444 ; 2445 2446no : /* empty */ { $$ = 0; } 2447 | NO { $$ = 1; } 2448 ; 2449 2450rport : STRING { 2451 char *p = strchr($1, ':'); 2452 2453 if (p == NULL) { 2454 if (($$.a = getservice($1)) == -1) 2455 YYERROR; 2456 $$.b = $$.t = 0; 2457 } else if (!strcmp(p+1, "*")) { 2458 *p = 0; 2459 if (($$.a = getservice($1)) == -1) 2460 YYERROR; 2461 $$.b = 0; 2462 $$.t = 1; 2463 } else { 2464 *p++ = 0; 2465 if (($$.a = getservice($1)) == -1 || 2466 ($$.b = getservice(p)) == -1) 2467 YYERROR; 2468 if ($$.a == $$.b) 2469 $$.b = 0; 2470 $$.t = 0; 2471 } 2472 } 2473 ; 2474 2475redirspec : host { $$ = $1; } 2476 | '{' redir_host_list '}' { $$ = $2; } 2477 ; 2478 2479redir_host_list : host { $$ = $1; } 2480 | redir_host_list comma host { 2481 $1->tail->next = $3; 2482 $1->tail = $3->tail; 2483 $$ = $1; 2484 } 2485 ; 2486 2487redirpool : /* empty */ { $$ = NULL; } 2488 | ARROW redirspec { 2489 $$ = calloc(1, sizeof(struct redirection)); 2490 if ($$ == NULL) 2491 err(1, "redirection: calloc"); 2492 $$->host = $2; 2493 $$->rport.a = $$->rport.b = $$->rport.t = 0; 2494 } 2495 | ARROW redirspec PORT rport { 2496 $$ = calloc(1, sizeof(struct redirection)); 2497 if ($$ == NULL) 2498 err(1, "redirection: calloc"); 2499 $$->host = $2; 2500 $$->rport = $4; 2501 } 2502 ; 2503 2504hashkey : /* empty */ 2505 { 2506 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 2507 if ($$ == NULL) 2508 err(1, "hashkey: calloc"); 2509 $$->key32[0] = arc4random(); 2510 $$->key32[1] = arc4random(); 2511 $$->key32[2] = arc4random(); 2512 $$->key32[3] = arc4random(); 2513 } 2514 | string 2515 { 2516 if (!strncmp($1, "0x", 2)) { 2517 if (strlen($1) != 34) { 2518 yyerror("hex key must be 128 bits " 2519 "(32 hex digits) long"); 2520 YYERROR; 2521 } 2522 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 2523 if ($$ == NULL) 2524 err(1, "hashkey: calloc"); 2525 2526 if (sscanf($1, "0x%8x%8x%8x%8x", 2527 &$$->key32[0], &$$->key32[1], 2528 &$$->key32[2], &$$->key32[3]) != 4) { 2529 free($$); 2530 yyerror("invalid hex key"); 2531 YYERROR; 2532 } 2533 } else { 2534 MD5_CTX context; 2535 2536 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 2537 if ($$ == NULL) 2538 err(1, "hashkey: calloc"); 2539 MD5Init(&context); 2540 MD5Update(&context, (unsigned char *)$1, 2541 strlen($1)); 2542 MD5Final((unsigned char *)$$, &context); 2543 HTONL($$->key32[0]); 2544 HTONL($$->key32[1]); 2545 HTONL($$->key32[2]); 2546 HTONL($$->key32[3]); 2547 } 2548 } 2549 ; 2550 2551pooltype : /* empty */ 2552 { 2553 $$.type = PF_POOL_NONE; 2554 $$.key = NULL; 2555 } 2556 | BITMASK 2557 { 2558 $$.type = PF_POOL_BITMASK; 2559 $$.key = NULL; 2560 } 2561 | RANDOM 2562 { 2563 $$.type = PF_POOL_RANDOM; 2564 $$.key = NULL; 2565 } 2566 | SOURCEHASH hashkey 2567 { 2568 $$.type = PF_POOL_SRCHASH; 2569 $$.key = $2; 2570 } 2571 | ROUNDROBIN 2572 { 2573 $$.type = PF_POOL_ROUNDROBIN; 2574 $$.key = NULL; 2575 } 2576 ; 2577 2578staticport : /* empty */ { $$ = 0; } 2579 | STATICPORT { $$ = 1; } 2580 ; 2581 2582redirection : /* empty */ { $$ = NULL; } 2583 | ARROW host { 2584 $$ = calloc(1, sizeof(struct redirection)); 2585 if ($$ == NULL) 2586 err(1, "redirection: calloc"); 2587 $$->host = $2; 2588 $$->rport.a = $$->rport.b = $$->rport.t = 0; 2589 } 2590 | ARROW host PORT rport { 2591 $$ = calloc(1, sizeof(struct redirection)); 2592 if ($$ == NULL) 2593 err(1, "redirection: calloc"); 2594 $$->host = $2; 2595 $$->rport = $4; 2596 } 2597 ; 2598 2599natpass : /* empty */ { $$ = 0; } 2600 | PASS { $$ = 1; } 2601 ; 2602 2603nataction : no NAT natpass { 2604 $$.b2 = $$.w = 0; 2605 if ($1) 2606 $$.b1 = PF_NONAT; 2607 else 2608 $$.b1 = PF_NAT; 2609 $$.b2 = $3; 2610 } 2611 | no RDR natpass { 2612 $$.b2 = $$.w = 0; 2613 if ($1) 2614 $$.b1 = PF_NORDR; 2615 else 2616 $$.b1 = PF_RDR; 2617 $$.b2 = $3; 2618 } 2619 ; 2620 2621natrule : nataction interface af proto fromto tag redirpool pooltype 2622 staticport 2623 { 2624 struct pf_rule r; 2625 2626 if (check_rulestate(PFCTL_STATE_NAT)) 2627 YYERROR; 2628 2629 memset(&r, 0, sizeof(r)); 2630 2631 r.action = $1.b1; 2632 r.natpass = $1.b2; 2633 r.af = $3; 2634 2635 if (!r.af) { 2636 if ($5.src.host && $5.src.host->af && 2637 !$5.src.host->ifindex) 2638 r.af = $5.src.host->af; 2639 else if ($5.dst.host && $5.dst.host->af && 2640 !$5.dst.host->ifindex) 2641 r.af = $5.dst.host->af; 2642 } 2643 2644 if ($6 != NULL) 2645 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) > 2646 PF_TAG_NAME_SIZE) { 2647 yyerror("tag too long, max %u chars", 2648 PF_TAG_NAME_SIZE - 1); 2649 YYERROR; 2650 } 2651 2652 if (r.action == PF_NONAT || r.action == PF_NORDR) { 2653 if ($7 != NULL) { 2654 yyerror("translation rule with 'no' " 2655 "does not need '->'"); 2656 YYERROR; 2657 } 2658 } else { 2659 if ($7 == NULL || $7->host == NULL) { 2660 yyerror("translation rule requires '-> " 2661 "address'"); 2662 YYERROR; 2663 } 2664 if (!r.af && ! $7->host->ifindex) 2665 r.af = $7->host->af; 2666 2667 remove_invalid_hosts(&$7->host, &r.af); 2668 if (invalid_redirect($7->host, r.af)) 2669 YYERROR; 2670 if (check_netmask($7->host, r.af)) 2671 YYERROR; 2672 2673 r.rpool.proxy_port[0] = ntohs($7->rport.a); 2674 2675 switch (r.action) { 2676 case PF_RDR: 2677 if (!$7->rport.b && $7->rport.t && 2678 $5.dst.port != NULL) { 2679 r.rpool.proxy_port[1] = 2680 ntohs($7->rport.a) + 2681 (ntohs($5.dst.port->port[1]) - 2682 ntohs($5.dst.port->port[0])); 2683 } else 2684 r.rpool.proxy_port[1] = 2685 ntohs($7->rport.b); 2686 break; 2687 case PF_NAT: 2688 r.rpool.proxy_port[1] = ntohs($7->rport.b); 2689 if (!r.rpool.proxy_port[0] && 2690 !r.rpool.proxy_port[1]) { 2691 r.rpool.proxy_port[0] = 2692 PF_NAT_PROXY_PORT_LOW; 2693 r.rpool.proxy_port[1] = 2694 PF_NAT_PROXY_PORT_HIGH; 2695 } else if (!r.rpool.proxy_port[1]) 2696 r.rpool.proxy_port[1] = 2697 r.rpool.proxy_port[0]; 2698 break; 2699 default: 2700 break; 2701 } 2702 2703 r.rpool.opts = $8.type; 2704 if (r.rpool.opts == PF_POOL_NONE) 2705 r.rpool.opts = PF_POOL_ROUNDROBIN; 2706 if (r.rpool.opts != PF_POOL_ROUNDROBIN) 2707 if (disallow_table($7->host, "tables " 2708 "are only supported in round-robin " 2709 "redirection pools")) 2710 YYERROR; 2711 if ($7->host->next) { 2712 if (r.rpool.opts != 2713 PF_POOL_ROUNDROBIN) { 2714 yyerror("only round-robin " 2715 "valid for multiple " 2716 "redirection addresses"); 2717 YYERROR; 2718 } 2719 } else { 2720 if ((r.af == AF_INET && 2721 unmask(&$7->host->addr.v.a.mask, 2722 r.af) == 32) || 2723 (r.af == AF_INET6 && 2724 unmask(&$7->host->addr.v.a.mask, 2725 r.af) == 128)) { 2726 r.rpool.opts = PF_POOL_NONE; 2727 } 2728 } 2729 } 2730 2731 if ($8.key != NULL) 2732 memcpy(&r.rpool.key, $8.key, 2733 sizeof(struct pf_poolhashkey)); 2734 2735 if ($9 != NULL) { 2736 if (r.action != PF_NAT) { 2737 yyerror("the 'static-port' option is " 2738 "only valid with nat rules"); 2739 YYERROR; 2740 } 2741 if (r.rpool.proxy_port[0] != 2742 PF_NAT_PROXY_PORT_LOW && 2743 r.rpool.proxy_port[1] != 2744 PF_NAT_PROXY_PORT_HIGH) { 2745 yyerror("the 'static-port' option can't" 2746 " be used when specifying a port" 2747 " range"); 2748 YYERROR; 2749 } 2750 r.rpool.proxy_port[0] = 0; 2751 r.rpool.proxy_port[1] = 0; 2752 } 2753 2754 expand_rule(&r, $2, $7 == NULL ? NULL : $7->host, $4, 2755 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 2756 $5.dst.port, 0, 0, 0); 2757 free($7); 2758 } 2759 ; 2760 2761binatrule : no BINAT natpass interface af proto FROM host TO ipspec tag 2762 redirection 2763 { 2764 struct pf_rule binat; 2765 struct pf_pooladdr *pa; 2766 2767 if (check_rulestate(PFCTL_STATE_NAT)) 2768 YYERROR; 2769 2770 memset(&binat, 0, sizeof(binat)); 2771 2772 if ($1) 2773 binat.action = PF_NOBINAT; 2774 else 2775 binat.action = PF_BINAT; 2776 binat.natpass = $3; 2777 binat.af = $5; 2778 if (!binat.af && $8 != NULL && $8->af) 2779 binat.af = $8->af; 2780 if (!binat.af && $10 != NULL && $10->af) 2781 binat.af = $10->af; 2782 if (!binat.af && $12 != NULL && $12->host) 2783 binat.af = $12->host->af; 2784 if (!binat.af) { 2785 yyerror("address family (inet/inet6) " 2786 "undefined"); 2787 YYERROR; 2788 } 2789 2790 if ($4 != NULL) { 2791 memcpy(binat.ifname, $4->ifname, 2792 sizeof(binat.ifname)); 2793 free($4); 2794 } 2795 if ($11 != NULL) 2796 if (strlcpy(binat.tagname, $11, 2797 PF_TAG_NAME_SIZE) > PF_TAG_NAME_SIZE) { 2798 yyerror("tag too long, max %u chars", 2799 PF_TAG_NAME_SIZE - 1); 2800 YYERROR; 2801 } 2802 2803 if ($6 != NULL) { 2804 binat.proto = $6->proto; 2805 free($6); 2806 } 2807 2808 if ($8 != NULL && disallow_table($8, "invalid use of " 2809 "table <%s> as the source address of a binat rule")) 2810 YYERROR; 2811 if ($12 != NULL && $12->host != NULL && disallow_table( 2812 $12->host, "invalid use of table <%s> as the " 2813 "redirect address of a binat rule")) 2814 YYERROR; 2815 2816 if ($8 != NULL) { 2817 if ($8->next) { 2818 yyerror("multiple binat ip addresses"); 2819 YYERROR; 2820 } 2821 if ($8->addr.type == PF_ADDR_DYNIFTL) 2822 $8->af = binat.af; 2823 if ($8->af != binat.af) { 2824 yyerror("binat ip versions must match"); 2825 YYERROR; 2826 } 2827 if (check_netmask($8, binat.af)) 2828 YYERROR; 2829 memcpy(&binat.src.addr, &$8->addr, 2830 sizeof(binat.src.addr)); 2831 free($8); 2832 } 2833 if ($10 != NULL) { 2834 if ($10->next) { 2835 yyerror("multiple binat ip addresses"); 2836 YYERROR; 2837 } 2838 if ($10->af != binat.af && $10->af) { 2839 yyerror("binat ip versions must match"); 2840 YYERROR; 2841 } 2842 if (check_netmask($10, binat.af)) 2843 YYERROR; 2844 memcpy(&binat.dst.addr, &$10->addr, 2845 sizeof(binat.dst.addr)); 2846 binat.dst.not = $10->not; 2847 free($10); 2848 } 2849 2850 if (binat.action == PF_NOBINAT) { 2851 if ($12 != NULL) { 2852 yyerror("'no binat' rule does not need" 2853 " '->'"); 2854 YYERROR; 2855 } 2856 } else { 2857 if ($12 == NULL || $12->host == NULL) { 2858 yyerror("'binat' rule requires" 2859 " '-> address'"); 2860 YYERROR; 2861 } 2862 2863 remove_invalid_hosts(&$12->host, &binat.af); 2864 if (invalid_redirect($12->host, binat.af)) 2865 YYERROR; 2866 if ($12->host->next != NULL) { 2867 yyerror("binat rule must redirect to " 2868 "a single address"); 2869 YYERROR; 2870 } 2871 if (check_netmask($12->host, binat.af)) 2872 YYERROR; 2873 2874 if (!PF_AZERO(&binat.src.addr.v.a.mask, 2875 binat.af) && 2876 !PF_AEQ(&binat.src.addr.v.a.mask, 2877 &$12->host->addr.v.a.mask, binat.af)) { 2878 yyerror("'binat' source mask and " 2879 "redirect mask must be the same"); 2880 YYERROR; 2881 } 2882 2883 TAILQ_INIT(&binat.rpool.list); 2884 pa = calloc(1, sizeof(struct pf_pooladdr)); 2885 if (pa == NULL) 2886 err(1, "binat: calloc"); 2887 pa->addr = $12->host->addr; 2888 pa->ifname[0] = 0; 2889 TAILQ_INSERT_TAIL(&binat.rpool.list, 2890 pa, entries); 2891 2892 free($12); 2893 } 2894 2895 pfctl_add_rule(pf, &binat); 2896 } 2897 ; 2898 2899tag : /* empty */ { $$ = NULL; } 2900 | TAG STRING { $$ = $2; } 2901 2902route_host : STRING { 2903 struct node_host *n; 2904 2905 $$ = calloc(1, sizeof(struct node_host)); 2906 if ($$ == NULL) 2907 err(1, "route_host: calloc"); 2908 if (($$->ifname = strdup($1)) == NULL) 2909 err(1, "routeto: strdup"); 2910 if ((n = ifa_exists($$->ifname)) == NULL) { 2911 yyerror("routeto: unknown interface %s", 2912 $$->ifname); 2913 YYERROR; 2914 } 2915 set_ipmask($$, 128); 2916 $$->next = NULL; 2917 $$->tail = $$; 2918 } 2919 | '(' STRING host ')' { 2920 struct node_host *n; 2921 2922 $$ = $3; 2923 if (($$->ifname = strdup($2)) == NULL) 2924 err(1, "routeto: strdup"); 2925 if ((n = ifa_exists($$->ifname)) == NULL) { 2926 yyerror("routeto: unknown interface %s", 2927 $$->ifname); 2928 YYERROR; 2929 } 2930 } 2931 ; 2932 2933route_host_list : route_host { $$ = $1; } 2934 | route_host_list comma route_host { 2935 if ($1->af == 0) 2936 $1->af = $3->af; 2937 if ($1->af != $3->af) { 2938 yyerror("all pool addresses must be in the " 2939 "same address family"); 2940 YYERROR; 2941 } 2942 $1->tail->next = $3; 2943 $1->tail = $3->tail; 2944 $$ = $1; 2945 } 2946 ; 2947 2948routespec : route_host { $$ = $1; } 2949 | '{' route_host_list '}' { $$ = $2; } 2950 ; 2951 2952route : /* empty */ { 2953 $$.host = NULL; 2954 $$.rt = 0; 2955 $$.pool_opts = 0; 2956 } 2957 | FASTROUTE { 2958 $$.host = NULL; 2959 $$.rt = PF_FASTROUTE; 2960 $$.pool_opts = 0; 2961 } 2962 | ROUTETO routespec pooltype { 2963 $$.host = $2; 2964 $$.rt = PF_ROUTETO; 2965 $$.pool_opts = $3.type; 2966 if ($3.key != NULL) 2967 $$.key = $3.key; 2968 } 2969 | REPLYTO routespec pooltype { 2970 $$.host = $2; 2971 $$.rt = PF_REPLYTO; 2972 $$.pool_opts = $3.type; 2973 if ($3.key != NULL) 2974 $$.key = $3.key; 2975 } 2976 | DUPTO routespec pooltype { 2977 $$.host = $2; 2978 $$.rt = PF_DUPTO; 2979 $$.pool_opts = $3.type; 2980 if ($3.key != NULL) 2981 $$.key = $3.key; 2982 } 2983 ; 2984 2985timeout_spec : STRING number 2986 { 2987 if (check_rulestate(PFCTL_STATE_OPTION)) 2988 YYERROR; 2989 if (pfctl_set_timeout(pf, $1, $2, 0) != 0) { 2990 yyerror("unknown timeout %s", $1); 2991 YYERROR; 2992 } 2993 } 2994 ; 2995 2996timeout_list : timeout_list comma timeout_spec 2997 | timeout_spec 2998 ; 2999 3000limit_spec : STRING number 3001 { 3002 if (check_rulestate(PFCTL_STATE_OPTION)) 3003 YYERROR; 3004 if (pfctl_set_limit(pf, $1, $2) != 0) { 3005 yyerror("unable to set limit %s %u", $1, $2); 3006 YYERROR; 3007 } 3008 } 3009 3010limit_list : limit_list comma limit_spec 3011 | limit_spec 3012 ; 3013 3014comma : ',' 3015 | /* empty */ 3016 ; 3017 3018yesno : NO { $$ = 0; } 3019 | STRING { 3020 if (!strcmp($1, "yes")) 3021 $$ = 1; 3022 else 3023 YYERROR; 3024 } 3025 3026unaryop : '=' { $$ = PF_OP_EQ; } 3027 | '!' '=' { $$ = PF_OP_NE; } 3028 | '<' '=' { $$ = PF_OP_LE; } 3029 | '<' { $$ = PF_OP_LT; } 3030 | '>' '=' { $$ = PF_OP_GE; } 3031 | '>' { $$ = PF_OP_GT; } 3032 ; 3033 3034%% 3035 3036int 3037yyerror(const char *fmt, ...) 3038{ 3039 va_list ap; 3040 extern char *infile; 3041 3042 errors = 1; 3043 va_start(ap, fmt); 3044 fprintf(stderr, "%s:%d: ", infile, yylval.lineno); 3045 vfprintf(stderr, fmt, ap); 3046 fprintf(stderr, "\n"); 3047 va_end(ap); 3048 return (0); 3049} 3050 3051int 3052disallow_table(struct node_host *h, const char *fmt) 3053{ 3054 for (; h != NULL; h = h->next) 3055 if (h->addr.type == PF_ADDR_TABLE) { 3056 yyerror(fmt, h->addr.v.tblname); 3057 return (1); 3058 } 3059 return (0); 3060} 3061 3062int 3063rule_consistent(struct pf_rule *r) 3064{ 3065 int problems = 0; 3066 3067 switch (r->action) { 3068 case PF_PASS: 3069 case PF_DROP: 3070 case PF_SCRUB: 3071 problems = filter_consistent(r); 3072 break; 3073 case PF_NAT: 3074 case PF_NONAT: 3075 problems = nat_consistent(r); 3076 break; 3077 case PF_RDR: 3078 case PF_NORDR: 3079 problems = rdr_consistent(r); 3080 break; 3081 case PF_BINAT: 3082 case PF_NOBINAT: 3083 default: 3084 break; 3085 } 3086 return (problems); 3087} 3088 3089int 3090filter_consistent(struct pf_rule *r) 3091{ 3092 int problems = 0; 3093 3094 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 3095 (r->src.port_op || r->dst.port_op)) { 3096 yyerror("port only applies to tcp/udp"); 3097 problems++; 3098 } 3099 if (r->src.port_op == PF_OP_RRG || r->dst.port_op == PF_OP_RRG) { 3100 yyerror("the ':' port operator only applies to rdr"); 3101 problems++; 3102 } 3103 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 3104 (r->type || r->code)) { 3105 yyerror("icmp-type/code only applies to icmp"); 3106 problems++; 3107 } 3108 if (!r->af && (r->type || r->code)) { 3109 yyerror("must indicate address family with icmp-type/code"); 3110 problems++; 3111 } 3112 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 3113 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 3114 yyerror("proto %s doesn't match address family %s", 3115 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 3116 r->af == AF_INET ? "inet" : "inet6"); 3117 problems++; 3118 } 3119 if ((r->keep_state == PF_STATE_MODULATE || r->keep_state == 3120 PF_STATE_SYNPROXY) && r->proto && r->proto != IPPROTO_TCP) { 3121 yyerror("modulate/synproxy state can only be applied to " 3122 "TCP rules"); 3123 problems++; 3124 } 3125 if (r->allow_opts && r->action != PF_PASS) { 3126 yyerror("allow-opts can only be specified for pass rules"); 3127 problems++; 3128 } 3129 if (!r->af && (r->src.addr.type == PF_ADDR_DYNIFTL || 3130 r->dst.addr.type == PF_ADDR_DYNIFTL)) { 3131 yyerror("dynamic addresses require address family " 3132 "(inet/inet6)"); 3133 problems++; 3134 } 3135 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 3136 r->dst.port_op || r->flagset || r->type || r->code)) { 3137 yyerror("fragments can be filtered only on IP header fields"); 3138 problems++; 3139 } 3140 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 3141 yyerror("return-rst can only be applied to TCP rules"); 3142 problems++; 3143 } 3144 if (r->action == PF_DROP && r->keep_state) { 3145 yyerror("keep state on block rules doesn't make sense"); 3146 problems++; 3147 } 3148 if ((r->tagname[0] || r->match_tagname[0]) && !r->keep_state && 3149 r->action == PF_PASS) { 3150 yyerror("tags cannot be used without keep state"); 3151 problems++; 3152 } 3153 return (-problems); 3154} 3155 3156int 3157nat_consistent(struct pf_rule *r) 3158{ 3159 int problems = 0; 3160 struct pf_pooladdr *pa; 3161 3162 if (r->src.port_op == PF_OP_RRG || r->dst.port_op == PF_OP_RRG) { 3163 yyerror("the ':' port operator only applies to rdr"); 3164 problems++; 3165 } 3166 if (!r->af) { 3167 TAILQ_FOREACH(pa, &r->rpool.list, entries) { 3168 if (pa->addr.type == PF_ADDR_DYNIFTL) { 3169 yyerror("dynamic addresses require " 3170 "address family (inet/inet6)"); 3171 problems++; 3172 break; 3173 } 3174 } 3175 } 3176 return (-problems); 3177} 3178 3179int 3180rdr_consistent(struct pf_rule *r) 3181{ 3182 int problems = 0; 3183 struct pf_pooladdr *pa; 3184 3185 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) { 3186 if (r->src.port_op) { 3187 yyerror("src port only applies to tcp/udp"); 3188 problems++; 3189 } 3190 if (r->dst.port_op) { 3191 yyerror("dst port only applies to tcp/udp"); 3192 problems++; 3193 } 3194 if (r->rpool.proxy_port[0]) { 3195 yyerror("rpool port only applies to tcp/udp"); 3196 problems++; 3197 } 3198 } 3199 if (r->dst.port_op && 3200 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 3201 yyerror("invalid port operator for rdr destination port"); 3202 problems++; 3203 } 3204 if (r->src.port_op == PF_OP_RRG) { 3205 yyerror("the ':' port operator only applies to rdr " 3206 "destination port"); 3207 problems++; 3208 } 3209 if (!r->af) { 3210 if (r->src.addr.type == PF_ADDR_DYNIFTL || 3211 r->dst.addr.type == PF_ADDR_DYNIFTL) { 3212 yyerror("dynamic addresses require address family " 3213 "(inet/inet6)"); 3214 problems++; 3215 } else { 3216 TAILQ_FOREACH(pa, &r->rpool.list, entries) { 3217 if (pa->addr.type == PF_ADDR_DYNIFTL) { 3218 yyerror("dynamic addresses require " 3219 "address family (inet/inet6)"); 3220 problems++; 3221 break; 3222 } 3223 } 3224 } 3225 } 3226 return (-problems); 3227} 3228 3229int 3230process_tabledef(char *name, struct table_opts *opts) 3231{ 3232 struct pfr_buffer ab; 3233 struct node_tinit *ti; 3234 3235 bzero(&ab, sizeof(ab)); 3236 ab.pfrb_type = PFRB_ADDRS; 3237 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 3238 if (ti->file) 3239 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) { 3240 if (errno) 3241 yyerror("cannot load \"%s\": %s", 3242 ti->file, strerror(errno)); 3243 else 3244 yyerror("file \"%s\" contains bad data", 3245 ti->file); 3246 goto _error; 3247 } 3248 if (ti->host) 3249 if (append_addr_host(&ab, ti->host, 0, 0)) { 3250 yyerror("cannot create address buffer: %s", 3251 strerror(errno)); 3252 goto _error; 3253 } 3254 } 3255 if (pf->opts & PF_OPT_VERBOSE) 3256 print_tabledef(name, opts->flags, opts->init_addr, 3257 &opts->init_nodes); 3258 if (!(pf->opts & PF_OPT_NOACTION) && 3259 pfctl_define_table(name, opts->flags, opts->init_addr, 3260 pf->anchor, pf->ruleset, &ab, pf->tticket)) { 3261 yyerror("cannot define table %s: %s", name, 3262 pfr_strerror(errno)); 3263 goto _error; 3264 } 3265 pf->tdirty = 1; 3266 pfr_buf_clear(&ab); 3267 return (0); 3268_error: 3269 pfr_buf_clear(&ab); 3270 return (-1); 3271} 3272 3273struct keywords { 3274 const char *k_name; 3275 int k_val; 3276}; 3277 3278/* macro gore, but you should've seen the prior indentation nightmare... */ 3279 3280#define FREE_LIST(T,r) \ 3281 do { \ 3282 T *p, *node = r; \ 3283 while (node != NULL) { \ 3284 p = node; \ 3285 node = node->next; \ 3286 free(p); \ 3287 } \ 3288 } while (0) 3289 3290#define LOOP_THROUGH(T,n,r,C) \ 3291 do { \ 3292 T *n; \ 3293 if (r == NULL) { \ 3294 r = calloc(1, sizeof(T)); \ 3295 if (r == NULL) \ 3296 err(1, "LOOP: calloc"); \ 3297 r->next = NULL; \ 3298 } \ 3299 n = r; \ 3300 while (n != NULL) { \ 3301 do { \ 3302 C; \ 3303 } while (0); \ 3304 n = n->next; \ 3305 } \ 3306 } while (0) 3307 3308void 3309expand_label_str(char *label, const char *srch, const char *repl) 3310{ 3311 char tmp[PF_RULE_LABEL_SIZE] = ""; 3312 char *p, *q; 3313 3314 p = q = label; 3315 while ((q = strstr(p, srch)) != NULL) { 3316 *q = '\0'; 3317 if ((strlcat(tmp, p, sizeof(tmp)) >= sizeof(tmp)) || 3318 (strlcat(tmp, repl, sizeof(tmp)) >= sizeof(tmp))) 3319 err(1, "expand_label: label too long"); 3320 q += strlen(srch); 3321 p = q; 3322 } 3323 if (strlcat(tmp, p, sizeof(tmp)) >= sizeof(tmp)) 3324 err(1, "expand_label: label too long"); 3325 strlcpy(label, tmp, PF_RULE_LABEL_SIZE); /* always fits */ 3326} 3327 3328void 3329expand_label_if(const char *name, char *label, const char *ifname) 3330{ 3331 if (strstr(label, name) != NULL) { 3332 if (!*ifname) 3333 expand_label_str(label, name, "any"); 3334 else 3335 expand_label_str(label, name, ifname); 3336 } 3337} 3338 3339void 3340expand_label_addr(const char *name, char *label, sa_family_t af, 3341 struct node_host *h) 3342{ 3343 char tmp[64], tmp_not[66]; 3344 3345 if (strstr(label, name) != NULL) { 3346 switch (h->addr.type) { 3347 case PF_ADDR_DYNIFTL: 3348 snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname); 3349 break; 3350 case PF_ADDR_TABLE: 3351 snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname); 3352 break; 3353 case PF_ADDR_NOROUTE: 3354 snprintf(tmp, sizeof(tmp), "no-route"); 3355 break; 3356 case PF_ADDR_ADDRMASK: 3357 if (!af || (PF_AZERO(&h->addr.v.a.addr, af) && 3358 PF_AZERO(&h->addr.v.a.mask, af))) 3359 snprintf(tmp, sizeof(tmp), "any"); 3360 else { 3361 char a[48]; 3362 int bits; 3363 3364 if (inet_ntop(af, &h->addr.v.a.addr, a, 3365 sizeof(a)) == NULL) 3366 snprintf(tmp, sizeof(tmp), "?"); 3367 else { 3368 bits = unmask(&h->addr.v.a.mask, af); 3369 if ((af == AF_INET && bits < 32) || 3370 (af == AF_INET6 && bits < 128)) 3371 snprintf(tmp, sizeof(tmp), 3372 "%s/%d", a, bits); 3373 else 3374 snprintf(tmp, sizeof(tmp), 3375 "%s", a); 3376 } 3377 } 3378 break; 3379 default: 3380 snprintf(tmp, sizeof(tmp), "?"); 3381 break; 3382 } 3383 3384 if (h->not) { 3385 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 3386 expand_label_str(label, name, tmp_not); 3387 } else 3388 expand_label_str(label, name, tmp); 3389 } 3390} 3391 3392void 3393expand_label_port(const char *name, char *label, struct node_port *port) 3394{ 3395 char a1[6], a2[6], op[13] = ""; 3396 3397 if (strstr(label, name) != NULL) { 3398 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0])); 3399 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1])); 3400 if (!port->op) 3401 ; 3402 else if (port->op == PF_OP_IRG) 3403 snprintf(op, sizeof(op), "%s><%s", a1, a2); 3404 else if (port->op == PF_OP_XRG) 3405 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 3406 else if (port->op == PF_OP_EQ) 3407 snprintf(op, sizeof(op), "%s", a1); 3408 else if (port->op == PF_OP_NE) 3409 snprintf(op, sizeof(op), "!=%s", a1); 3410 else if (port->op == PF_OP_LT) 3411 snprintf(op, sizeof(op), "<%s", a1); 3412 else if (port->op == PF_OP_LE) 3413 snprintf(op, sizeof(op), "<=%s", a1); 3414 else if (port->op == PF_OP_GT) 3415 snprintf(op, sizeof(op), ">%s", a1); 3416 else if (port->op == PF_OP_GE) 3417 snprintf(op, sizeof(op), ">=%s", a1); 3418 expand_label_str(label, name, op); 3419 } 3420} 3421 3422void 3423expand_label_proto(const char *name, char *label, u_int8_t proto) 3424{ 3425 struct protoent *pe; 3426 char n[4]; 3427 3428 if (strstr(label, name) != NULL) { 3429 pe = getprotobynumber(proto); 3430 if (pe != NULL) 3431 expand_label_str(label, name, pe->p_name); 3432 else { 3433 snprintf(n, sizeof(n), "%u", proto); 3434 expand_label_str(label, name, n); 3435 } 3436 } 3437} 3438 3439void 3440expand_label_nr(const char *name, char *label) 3441{ 3442 char n[11]; 3443 3444 if (strstr(label, name) != NULL) { 3445 snprintf(n, sizeof(n), "%u", pf->rule_nr); 3446 expand_label_str(label, name, n); 3447 } 3448} 3449 3450void 3451expand_label(char *label, const char *ifname, sa_family_t af, 3452 struct node_host *src_host, struct node_port *src_port, 3453 struct node_host *dst_host, struct node_port *dst_port, 3454 u_int8_t proto) 3455{ 3456 expand_label_if("$if", label, ifname); 3457 expand_label_addr("$srcaddr", label, af, src_host); 3458 expand_label_addr("$dstaddr", label, af, dst_host); 3459 expand_label_port("$srcport", label, src_port); 3460 expand_label_port("$dstport", label, dst_port); 3461 expand_label_proto("$proto", label, proto); 3462 expand_label_nr("$nr", label); 3463} 3464 3465int 3466expand_altq(struct pf_altq *a, struct node_if *interfaces, 3467 struct node_queue *nqueues, struct node_queue_bw bwspec, 3468 struct node_queue_opt *opts) 3469{ 3470 struct pf_altq pa, pb; 3471 char qname[PF_QNAME_SIZE]; 3472 struct node_queue *n; 3473 struct node_queue_bw bw; 3474 int errs = 0; 3475 3476 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 3477 FREE_LIST(struct node_if, interfaces); 3478 FREE_LIST(struct node_queue, nqueues); 3479 return (0); 3480 } 3481 3482 LOOP_THROUGH(struct node_if, interface, interfaces, 3483 memcpy(&pa, a, sizeof(struct pf_altq)); 3484 if (strlcpy(pa.ifname, interface->ifname, 3485 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 3486 errx(1, "expand_altq: strlcpy"); 3487 3488 if (interface->not) { 3489 yyerror("altq on ! <interface> is not supported"); 3490 errs++; 3491 } else { 3492 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 3493 errs++; 3494 else 3495 if (pfctl_add_altq(pf, &pa)) 3496 errs++; 3497 3498 if (pf->opts & PF_OPT_VERBOSE) { 3499 print_altq(&pf->paltq->altq, 0, 3500 &bwspec, opts); 3501 if (nqueues && nqueues->tail) { 3502 printf("queue { "); 3503 LOOP_THROUGH(struct node_queue, queue, 3504 nqueues, 3505 printf("%s ", 3506 queue->queue); 3507 ); 3508 printf("}"); 3509 } 3510 printf("\n"); 3511 } 3512 3513 if (pa.scheduler == ALTQT_CBQ || 3514 pa.scheduler == ALTQT_HFSC) { 3515 /* now create a root queue */ 3516 memset(&pb, 0, sizeof(struct pf_altq)); 3517 if (strlcpy(qname, "root_", sizeof(qname)) >= 3518 sizeof(qname)) 3519 errx(1, "expand_altq: strlcpy"); 3520 if (strlcat(qname, interface->ifname, 3521 sizeof(qname)) >= sizeof(qname)) 3522 errx(1, "expand_altq: strlcat"); 3523 if (strlcpy(pb.qname, qname, 3524 sizeof(pb.qname)) >= sizeof(pb.qname)) 3525 errx(1, "expand_altq: strlcpy"); 3526 if (strlcpy(pb.ifname, interface->ifname, 3527 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 3528 errx(1, "expand_altq: strlcpy"); 3529 pb.qlimit = pa.qlimit; 3530 pb.scheduler = pa.scheduler; 3531 bw.bw_absolute = pa.ifbandwidth; 3532 bw.bw_percent = 0; 3533 if (eval_pfqueue(pf, &pb, &bw, opts)) 3534 errs++; 3535 else 3536 if (pfctl_add_altq(pf, &pb)) 3537 errs++; 3538 } 3539 3540 LOOP_THROUGH(struct node_queue, queue, nqueues, 3541 n = calloc(1, sizeof(struct node_queue)); 3542 if (n == NULL) 3543 err(1, "expand_altq: calloc"); 3544 if (pa.scheduler == ALTQT_CBQ || 3545 pa.scheduler == ALTQT_HFSC) 3546 if (strlcpy(n->parent, qname, 3547 sizeof(n->parent)) >= 3548 sizeof(n->parent)) 3549 errx(1, "expand_altq: strlcpy"); 3550 if (strlcpy(n->queue, queue->queue, 3551 sizeof(n->queue)) >= sizeof(n->queue)) 3552 errx(1, "expand_altq: strlcpy"); 3553 if (strlcpy(n->ifname, interface->ifname, 3554 sizeof(n->ifname)) >= sizeof(n->ifname)) 3555 errx(1, "expand_altq: strlcpy"); 3556 n->scheduler = pa.scheduler; 3557 n->next = NULL; 3558 n->tail = n; 3559 if (queues == NULL) 3560 queues = n; 3561 else { 3562 queues->tail->next = n; 3563 queues->tail = n; 3564 } 3565 ); 3566 } 3567 ); 3568 FREE_LIST(struct node_if, interfaces); 3569 FREE_LIST(struct node_queue, nqueues); 3570 3571 return (errs); 3572} 3573 3574int 3575expand_queue(struct pf_altq *a, struct node_if *interfaces, 3576 struct node_queue *nqueues, struct node_queue_bw bwspec, 3577 struct node_queue_opt *opts) 3578{ 3579 struct node_queue *n, *nq; 3580 struct pf_altq pa; 3581 u_int8_t found = 0; 3582 u_int8_t errs = 0; 3583 3584 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 3585 FREE_LIST(struct node_queue, nqueues); 3586 return (0); 3587 } 3588 3589 if (queues == NULL) { 3590 yyerror("queue %s has no parent", a->qname); 3591 FREE_LIST(struct node_queue, nqueues); 3592 return (1); 3593 } 3594 3595 LOOP_THROUGH(struct node_if, interface, interfaces, 3596 LOOP_THROUGH(struct node_queue, tqueue, queues, 3597 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 3598 (interface->ifname[0] == 0 || 3599 (!interface->not && !strncmp(interface->ifname, 3600 tqueue->ifname, IFNAMSIZ)) || 3601 (interface->not && strncmp(interface->ifname, 3602 tqueue->ifname, IFNAMSIZ)))) { 3603 /* found ourself in queues */ 3604 found++; 3605 3606 memcpy(&pa, a, sizeof(struct pf_altq)); 3607 3608 if (pa.scheduler != ALTQT_NONE && 3609 pa.scheduler != tqueue->scheduler) { 3610 yyerror("exactly one scheduler type " 3611 "per interface allowed"); 3612 return (1); 3613 } 3614 pa.scheduler = tqueue->scheduler; 3615 3616 /* scheduler dependent error checking */ 3617 switch (pa.scheduler) { 3618 case ALTQT_PRIQ: 3619 if (nqueues != NULL) { 3620 yyerror("priq queues cannot " 3621 "have child queues"); 3622 return (1); 3623 } 3624 if (bwspec.bw_absolute > 0 || 3625 bwspec.bw_percent < 100) { 3626 yyerror("priq doesn't take " 3627 "bandwidth"); 3628 return (1); 3629 } 3630 break; 3631 default: 3632 break; 3633 } 3634 3635 if (strlcpy(pa.ifname, tqueue->ifname, 3636 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 3637 errx(1, "expand_queue: strlcpy"); 3638 if (strlcpy(pa.parent, tqueue->parent, 3639 sizeof(pa.parent)) >= sizeof(pa.parent)) 3640 errx(1, "expand_queue: strlcpy"); 3641 3642 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 3643 errs++; 3644 else 3645 if (pfctl_add_altq(pf, &pa)) 3646 errs++; 3647 3648 for (nq = nqueues; nq != NULL; nq = nq->next) { 3649 if (!strcmp(a->qname, nq->queue)) { 3650 yyerror("queue cannot have " 3651 "itself as child"); 3652 errs++; 3653 continue; 3654 } 3655 n = calloc(1, 3656 sizeof(struct node_queue)); 3657 if (n == NULL) 3658 err(1, "expand_queue: calloc"); 3659 if (strlcpy(n->parent, a->qname, 3660 sizeof(n->parent)) >= 3661 sizeof(n->parent)) 3662 errx(1, "expand_queue strlcpy"); 3663 if (strlcpy(n->queue, nq->queue, 3664 sizeof(n->queue)) >= 3665 sizeof(n->queue)) 3666 errx(1, "expand_queue strlcpy"); 3667 if (strlcpy(n->ifname, tqueue->ifname, 3668 sizeof(n->ifname)) >= 3669 sizeof(n->ifname)) 3670 errx(1, "expand_queue strlcpy"); 3671 n->scheduler = tqueue->scheduler; 3672 n->next = NULL; 3673 n->tail = n; 3674 if (queues == NULL) 3675 queues = n; 3676 else { 3677 queues->tail->next = n; 3678 queues->tail = n; 3679 } 3680 } 3681 if ((pf->opts & PF_OPT_VERBOSE) && ( 3682 (found == 1 && interface->ifname[0] == 0) || 3683 (found > 0 && interface->ifname[0] != 0))) { 3684 print_queue(&pf->paltq->altq, 0, 3685 &bwspec, interface->ifname[0] != 0, 3686 opts); 3687 if (nqueues && nqueues->tail) { 3688 printf("{ "); 3689 LOOP_THROUGH(struct node_queue, 3690 queue, nqueues, 3691 printf("%s ", 3692 queue->queue); 3693 ); 3694 printf("}"); 3695 } 3696 printf("\n"); 3697 } 3698 } 3699 ); 3700 ); 3701 3702 FREE_LIST(struct node_queue, nqueues); 3703 FREE_LIST(struct node_if, interfaces); 3704 3705 if (!found) { 3706 yyerror("queue %s has no parent", a->qname); 3707 errs++; 3708 } 3709 3710 if (errs) 3711 return (1); 3712 else 3713 return (0); 3714} 3715 3716void 3717expand_rule(struct pf_rule *r, 3718 struct node_if *interfaces, struct node_host *rpool_hosts, 3719 struct node_proto *protos, struct node_os *src_oses, 3720 struct node_host *src_hosts, struct node_port *src_ports, 3721 struct node_host *dst_hosts, struct node_port *dst_ports, 3722 struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types) 3723{ 3724 sa_family_t af = r->af; 3725 int added = 0, error = 0; 3726 char ifname[IF_NAMESIZE]; 3727 char label[PF_RULE_LABEL_SIZE]; 3728 struct pf_pooladdr *pa; 3729 struct node_host *h; 3730 u_int8_t flags, flagset; 3731 3732 if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label)) 3733 errx(1, "expand_rule: strlcpy"); 3734 flags = r->flags; 3735 flagset = r->flagset; 3736 3737 LOOP_THROUGH(struct node_if, interface, interfaces, 3738 LOOP_THROUGH(struct node_proto, proto, protos, 3739 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 3740 LOOP_THROUGH(struct node_host, src_host, src_hosts, 3741 LOOP_THROUGH(struct node_port, src_port, src_ports, 3742 LOOP_THROUGH(struct node_os, src_os, src_oses, 3743 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 3744 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 3745 LOOP_THROUGH(struct node_uid, uid, uids, 3746 LOOP_THROUGH(struct node_gid, gid, gids, 3747 3748 r->af = af; 3749 /* for link-local IPv6 address, interface must match up */ 3750 if ((r->af && src_host->af && r->af != src_host->af) || 3751 (r->af && dst_host->af && r->af != dst_host->af) || 3752 (src_host->af && dst_host->af && 3753 src_host->af != dst_host->af) || 3754 (src_host->ifindex && dst_host->ifindex && 3755 src_host->ifindex != dst_host->ifindex) || 3756 (src_host->ifindex && if_nametoindex(interface->ifname) && 3757 src_host->ifindex != if_nametoindex(interface->ifname)) || 3758 (dst_host->ifindex && if_nametoindex(interface->ifname) && 3759 dst_host->ifindex != if_nametoindex(interface->ifname))) 3760 continue; 3761 if (!r->af && src_host->af) 3762 r->af = src_host->af; 3763 else if (!r->af && dst_host->af) 3764 r->af = dst_host->af; 3765 3766 if (if_indextoname(src_host->ifindex, ifname)) 3767 memcpy(r->ifname, ifname, sizeof(r->ifname)); 3768 else if (if_indextoname(dst_host->ifindex, ifname)) 3769 memcpy(r->ifname, ifname, sizeof(r->ifname)); 3770 else 3771 memcpy(r->ifname, interface->ifname, sizeof(r->ifname)); 3772 3773 if (strlcpy(r->label, label, sizeof(r->label)) >= 3774 sizeof(r->label)) 3775 errx(1, "expand_rule: strlcpy"); 3776 expand_label(r->label, r->ifname, r->af, src_host, src_port, 3777 dst_host, dst_port, proto->proto); 3778 3779 error += check_netmask(src_host, r->af); 3780 error += check_netmask(dst_host, r->af); 3781 3782 r->ifnot = interface->not; 3783 r->proto = proto->proto; 3784 r->src.addr = src_host->addr; 3785 r->src.not = src_host->not; 3786 r->src.port[0] = src_port->port[0]; 3787 r->src.port[1] = src_port->port[1]; 3788 r->src.port_op = src_port->op; 3789 r->dst.addr = dst_host->addr; 3790 r->dst.not = dst_host->not; 3791 r->dst.port[0] = dst_port->port[0]; 3792 r->dst.port[1] = dst_port->port[1]; 3793 r->dst.port_op = dst_port->op; 3794 r->uid.op = uid->op; 3795 r->uid.uid[0] = uid->uid[0]; 3796 r->uid.uid[1] = uid->uid[1]; 3797 r->gid.op = gid->op; 3798 r->gid.gid[0] = gid->gid[0]; 3799 r->gid.gid[1] = gid->gid[1]; 3800 r->type = icmp_type->type; 3801 r->code = icmp_type->code; 3802 3803 if (r->proto && r->proto != IPPROTO_TCP) { 3804 r->flags = 0; 3805 r->flagset = 0; 3806 } else { 3807 r->flags = flags; 3808 r->flagset = flagset; 3809 } 3810 if (icmp_type->proto && r->proto != icmp_type->proto) { 3811 yyerror("icmp-type mismatch"); 3812 error++; 3813 } 3814 3815 if (src_os && src_os->os) { 3816 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 3817 if ((pf->opts & PF_OPT_VERBOSE2) && 3818 r->os_fingerprint == PF_OSFP_NOMATCH) 3819 fprintf(stderr, 3820 "warning: unknown '%s' OS fingerprint\n", 3821 src_os->os); 3822 } else { 3823 r->os_fingerprint = PF_OSFP_ANY; 3824 } 3825 3826 TAILQ_INIT(&r->rpool.list); 3827 for (h = rpool_hosts; h != NULL; h = h->next) { 3828 pa = calloc(1, sizeof(struct pf_pooladdr)); 3829 if (pa == NULL) 3830 err(1, "expand_rule: calloc"); 3831 pa->addr = h->addr; 3832 if (h->ifname != NULL) { 3833 if (strlcpy(pa->ifname, h->ifname, 3834 sizeof(pa->ifname)) >= 3835 sizeof(pa->ifname)) 3836 errx(1, "expand_rule: strlcpy"); 3837 } else 3838 pa->ifname[0] = 0; 3839 TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries); 3840 } 3841 3842 if (rule_consistent(r) < 0 || error) 3843 yyerror("skipping rule due to errors"); 3844 else { 3845 r->nr = pf->rule_nr++; 3846 pfctl_add_rule(pf, r); 3847 added++; 3848 } 3849 3850 )))))))))); 3851 3852 FREE_LIST(struct node_if, interfaces); 3853 FREE_LIST(struct node_proto, protos); 3854 FREE_LIST(struct node_host, src_hosts); 3855 FREE_LIST(struct node_port, src_ports); 3856 FREE_LIST(struct node_os, src_oses); 3857 FREE_LIST(struct node_host, dst_hosts); 3858 FREE_LIST(struct node_port, dst_ports); 3859 FREE_LIST(struct node_uid, uids); 3860 FREE_LIST(struct node_gid, gids); 3861 FREE_LIST(struct node_icmp, icmp_types); 3862 FREE_LIST(struct node_host, rpool_hosts); 3863 3864 if (!added) 3865 yyerror("rule expands to no valid combination"); 3866} 3867 3868#undef FREE_LIST 3869#undef LOOP_THROUGH 3870 3871int 3872check_rulestate(int desired_state) 3873{ 3874 if (require_order && (rulestate > desired_state)) { 3875 yyerror("Rules must be in order: options, normalization, " 3876 "queueing, translation, filtering"); 3877 return (1); 3878 } 3879 rulestate = desired_state; 3880 return (0); 3881} 3882 3883int 3884kw_cmp(const void *k, const void *e) 3885{ 3886 return (strcmp(k, ((const struct keywords *)e)->k_name)); 3887} 3888 3889int 3890lookup(char *s) 3891{ 3892 /* this has to be sorted always */ 3893 static const struct keywords keywords[] = { 3894 { "all", ALL}, 3895 { "allow-opts", ALLOWOPTS}, 3896 { "altq", ALTQ}, 3897 { "anchor", ANCHOR}, 3898 { "antispoof", ANTISPOOF}, 3899 { "any", ANY}, 3900 { "bandwidth", BANDWIDTH}, 3901 { "binat", BINAT}, 3902 { "binat-anchor", BINATANCHOR}, 3903 { "bitmask", BITMASK}, 3904 { "block", BLOCK}, 3905 { "block-policy", BLOCKPOLICY}, 3906 { "cbq", CBQ}, 3907 { "code", CODE}, 3908 { "crop", FRAGCROP}, 3909 { "drop", DROP}, 3910 { "drop-ovl", FRAGDROP}, 3911 { "dup-to", DUPTO}, 3912 { "fastroute", FASTROUTE}, 3913 { "file", FILENAME}, 3914 { "fingerprints", FINGERPRINTS}, 3915 { "flags", FLAGS}, 3916 { "for", FOR}, 3917 { "fragment", FRAGMENT}, 3918 { "from", FROM}, 3919 { "group", GROUP}, 3920 { "hfsc", HFSC}, 3921 { "icmp-type", ICMPTYPE}, 3922 { "icmp6-type", ICMP6TYPE}, 3923 { "in", IN}, 3924 { "inet", INET}, 3925 { "inet6", INET6}, 3926 { "keep", KEEP}, 3927 { "label", LABEL}, 3928 { "limit", LIMIT}, 3929 { "linkshare", LINKSHARE}, 3930 { "load", LOAD}, 3931 { "log", LOG}, 3932 { "log-all", LOGALL}, 3933 { "loginterface", LOGINTERFACE}, 3934 { "max", MAXIMUM}, 3935 { "max-mss", MAXMSS}, 3936 { "min-ttl", MINTTL}, 3937 { "modulate", MODULATE}, 3938 { "nat", NAT}, 3939 { "nat-anchor", NATANCHOR}, 3940 { "no", NO}, 3941 { "no-df", NODF}, 3942 { "no-route", NOROUTE}, 3943 { "on", ON}, 3944 { "optimization", OPTIMIZATION}, 3945 { "os", OS}, 3946 { "out", OUT}, 3947 { "pass", PASS}, 3948 { "port", PORT}, 3949 { "priority", PRIORITY}, 3950 { "priq", PRIQ}, 3951 { "proto", PROTO}, 3952 { "qlimit", QLIMIT}, 3953 { "queue", QUEUE}, 3954 { "quick", QUICK}, 3955 { "random", RANDOM}, 3956 { "random-id", RANDOMID}, 3957 { "rdr", RDR}, 3958 { "rdr-anchor", RDRANCHOR}, 3959 { "realtime", REALTIME}, 3960 { "reassemble", REASSEMBLE}, 3961 { "reply-to", REPLYTO}, 3962 { "require-order", REQUIREORDER}, 3963 { "return", RETURN}, 3964 { "return-icmp", RETURNICMP}, 3965 { "return-icmp6", RETURNICMP6}, 3966 { "return-rst", RETURNRST}, 3967 { "round-robin", ROUNDROBIN}, 3968 { "route-to", ROUTETO}, 3969 { "scrub", SCRUB}, 3970 { "set", SET}, 3971 { "source-hash", SOURCEHASH}, 3972 { "state", STATE}, 3973 { "static-port", STATICPORT}, 3974 { "synproxy", SYNPROXY}, 3975 { "table", TABLE}, 3976 { "tag", TAG}, 3977 { "tagged", TAGGED}, 3978 { "tbrsize", TBRSIZE}, 3979 { "timeout", TIMEOUT}, 3980 { "to", TO}, 3981 { "tos", TOS}, 3982 { "ttl", TTL}, 3983 { "upperlimit", UPPERLIMIT}, 3984 { "user", USER}, 3985 }; 3986 const struct keywords *p; 3987 3988 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 3989 sizeof(keywords[0]), kw_cmp); 3990 3991 if (p) { 3992 if (debug > 1) 3993 fprintf(stderr, "%s: %d\n", s, p->k_val); 3994 return (p->k_val); 3995 } else { 3996 if (debug > 1) 3997 fprintf(stderr, "string: %s\n", s); 3998 return (STRING); 3999 } 4000} 4001 4002#define MAXPUSHBACK 128 4003 4004char *parsebuf; 4005int parseindex; 4006char pushback_buffer[MAXPUSHBACK]; 4007int pushback_index = 0; 4008 4009int 4010lgetc(FILE *f) 4011{ 4012 int c, next; 4013 4014 if (parsebuf) { 4015 /* Read character from the parsebuffer instead of input. */ 4016 if (parseindex >= 0) { 4017 c = parsebuf[parseindex++]; 4018 if (c != '\0') 4019 return (c); 4020 parsebuf = NULL; 4021 } else 4022 parseindex++; 4023 } 4024 4025 if (pushback_index) 4026 return (pushback_buffer[--pushback_index]); 4027 4028 while ((c = getc(f)) == '\\') { 4029 next = getc(f); 4030 if (next != '\n') { 4031 if (isspace(next)) 4032 yyerror("whitespace after \\"); 4033 ungetc(next, f); 4034 break; 4035 } 4036 yylval.lineno = lineno; 4037 lineno++; 4038 } 4039 if (c == '\t' || c == ' ') { 4040 /* Compress blanks to a single space. */ 4041 do { 4042 c = getc(f); 4043 } while (c == '\t' || c == ' '); 4044 ungetc(c, f); 4045 c = ' '; 4046 } 4047 4048 return (c); 4049} 4050 4051int 4052lungetc(int c) 4053{ 4054 if (c == EOF) 4055 return (EOF); 4056 if (parsebuf) { 4057 parseindex--; 4058 if (parseindex >= 0) 4059 return (c); 4060 } 4061 if (pushback_index < MAXPUSHBACK-1) 4062 return (pushback_buffer[pushback_index++] = c); 4063 else 4064 return (EOF); 4065} 4066 4067int 4068findeol(void) 4069{ 4070 int c; 4071 4072 parsebuf = NULL; 4073 pushback_index = 0; 4074 4075 /* skip to either EOF or the first real EOL */ 4076 while (1) { 4077 c = lgetc(fin); 4078 if (c == '\n') { 4079 lineno++; 4080 break; 4081 } 4082 if (c == EOF) 4083 break; 4084 } 4085 return (ERROR); 4086} 4087 4088int 4089yylex(void) 4090{ 4091 char buf[8096]; 4092 char *p, *val; 4093 int endc, c, next; 4094 int token; 4095 4096top: 4097 p = buf; 4098 while ((c = lgetc(fin)) == ' ') 4099 ; /* nothing */ 4100 4101 yylval.lineno = lineno; 4102 if (c == '#') 4103 while ((c = lgetc(fin)) != '\n' && c != EOF) 4104 ; /* nothing */ 4105 if (c == '$' && parsebuf == NULL) { 4106 while (1) { 4107 if ((c = lgetc(fin)) == EOF) 4108 return (0); 4109 4110 if (p + 1 >= buf + sizeof(buf) - 1) { 4111 yyerror("string too long"); 4112 return (findeol()); 4113 } 4114 if (isalnum(c) || c == '_') { 4115 *p++ = (char)c; 4116 continue; 4117 } 4118 *p = '\0'; 4119 lungetc(c); 4120 break; 4121 } 4122 val = symget(buf); 4123 if (val == NULL) { 4124 yyerror("macro '%s' not defined", buf); 4125 return (findeol()); 4126 } 4127 parsebuf = val; 4128 parseindex = 0; 4129 goto top; 4130 } 4131 4132 switch (c) { 4133 case '\'': 4134 case '"': 4135 endc = c; 4136 while (1) { 4137 if ((c = lgetc(fin)) == EOF) 4138 return (0); 4139 if (c == endc) { 4140 *p = '\0'; 4141 break; 4142 } 4143 if (c == '\n') { 4144 lineno++; 4145 continue; 4146 } 4147 if (p + 1 >= buf + sizeof(buf) - 1) { 4148 yyerror("string too long"); 4149 return (findeol()); 4150 } 4151 *p++ = (char)c; 4152 } 4153 yylval.v.string = strdup(buf); 4154 if (yylval.v.string == NULL) 4155 err(1, "yylex: strdup"); 4156 return (STRING); 4157 case '<': 4158 next = lgetc(fin); 4159 if (next == '>') { 4160 yylval.v.i = PF_OP_XRG; 4161 return (PORTBINARY); 4162 } 4163 lungetc(next); 4164 break; 4165 case '>': 4166 next = lgetc(fin); 4167 if (next == '<') { 4168 yylval.v.i = PF_OP_IRG; 4169 return (PORTBINARY); 4170 } 4171 lungetc(next); 4172 break; 4173 case '-': 4174 next = lgetc(fin); 4175 if (next == '>') 4176 return (ARROW); 4177 lungetc(next); 4178 break; 4179 } 4180 4181#define allowed_in_string(x) \ 4182 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 4183 x != '{' && x != '}' && x != '<' && x != '>' && \ 4184 x != '!' && x != '=' && x != '/' && x != '#' && \ 4185 x != ',')) 4186 4187 if (isalnum(c) || c == ':' || c == '_') { 4188 do { 4189 *p++ = c; 4190 if ((unsigned)(p-buf) >= sizeof(buf)) { 4191 yyerror("string too long"); 4192 return (findeol()); 4193 } 4194 } while ((c = lgetc(fin)) != EOF && (allowed_in_string(c))); 4195 lungetc(c); 4196 *p = '\0'; 4197 token = lookup(buf); 4198 yylval.v.string = strdup(buf); 4199 if (yylval.v.string == NULL) 4200 err(1, "yylex: strdup"); 4201 return (token); 4202 } 4203 if (c == '\n') { 4204 yylval.lineno = lineno; 4205 lineno++; 4206 } 4207 if (c == EOF) 4208 return (0); 4209 return (c); 4210} 4211 4212int 4213parse_rules(FILE *input, struct pfctl *xpf) 4214{ 4215 struct sym *sym; 4216 4217 fin = input; 4218 pf = xpf; 4219 lineno = 1; 4220 errors = 0; 4221 rulestate = PFCTL_STATE_NONE; 4222 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 4223 returnicmp6default = 4224 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 4225 blockpolicy = PFRULE_DROP; 4226 require_order = 1; 4227 4228 yyparse(); 4229 4230 /* Free macros and check which have not been used. */ 4231 TAILQ_FOREACH(sym, &symhead, entries) { 4232 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 4233 fprintf(stderr, "warning: macro '%s' not " 4234 "used\n", sym->nam); 4235 free(sym->nam); 4236 free(sym->val); 4237 TAILQ_REMOVE(&symhead, sym, entries); 4238 } 4239 4240 return (errors ? -1 : 0); 4241} 4242 4243/* 4244 * Over-designed efficiency is a French and German concept, so how about 4245 * we wait until they discover this ugliness and make it all fancy. 4246 */ 4247int 4248symset(const char *nam, const char *val, int persist) 4249{ 4250 struct sym *sym; 4251 4252 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 4253 sym = TAILQ_NEXT(sym, entries)) 4254 ; /* nothing */ 4255 4256 if (sym != NULL) { 4257 if (sym->persist == 1) 4258 return (0); 4259 else { 4260 free(sym->nam); 4261 free(sym->val); 4262 TAILQ_REMOVE(&symhead, sym, entries); 4263 free(sym); 4264 } 4265 } 4266 if ((sym = calloc(1, sizeof(*sym))) == NULL) 4267 return (-1); 4268 4269 sym->nam = strdup(nam); 4270 if (sym->nam == NULL) { 4271 free(sym); 4272 return (-1); 4273 } 4274 sym->val = strdup(val); 4275 if (sym->val == NULL) { 4276 free(sym->nam); 4277 free(sym); 4278 return (-1); 4279 } 4280 sym->used = 0; 4281 sym->persist = persist; 4282 TAILQ_INSERT_TAIL(&symhead, sym, entries); 4283 return (0); 4284} 4285 4286int 4287pfctl_cmdline_symset(char *s) 4288{ 4289 char *sym, *val; 4290 int ret; 4291 4292 if ((val = strrchr(s, '=')) == NULL) 4293 return (-1); 4294 4295 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL) 4296 err(1, "pfctl_cmdline_symset: malloc"); 4297 4298 strlcpy(sym, s, strlen(s) - strlen(val) + 1); 4299 4300 ret = symset(sym, val + 1, 1); 4301 free(sym); 4302 4303 return (ret); 4304} 4305 4306char * 4307symget(const char *nam) 4308{ 4309 struct sym *sym; 4310 4311 TAILQ_FOREACH(sym, &symhead, entries) 4312 if (strcmp(nam, sym->nam) == 0) { 4313 sym->used = 1; 4314 return (sym->val); 4315 } 4316 return (NULL); 4317} 4318 4319void 4320decide_address_family(struct node_host *n, sa_family_t *af) 4321{ 4322 sa_family_t target_af = 0; 4323 4324 while (!*af && n != NULL) { 4325 if (n->af) { 4326 if (target_af == 0) 4327 target_af = n->af; 4328 if (target_af != n->af) 4329 return; 4330 } 4331 n = n->next; 4332 } 4333 if (!*af && target_af) 4334 *af = target_af; 4335} 4336 4337void 4338remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 4339{ 4340 struct node_host *n = *nh, *prev = NULL; 4341 4342 while (n != NULL) { 4343 if (*af && n->af && n->af != *af) { 4344 /* unlink and free n */ 4345 struct node_host *next = n->next; 4346 4347 /* adjust tail pointer */ 4348 if (n == (*nh)->tail) 4349 (*nh)->tail = prev; 4350 /* adjust previous node's next pointer */ 4351 if (prev == NULL) 4352 *nh = next; 4353 else 4354 prev->next = next; 4355 /* free node */ 4356 if (n->ifname != NULL) 4357 free(n->ifname); 4358 free(n); 4359 n = next; 4360 } else { 4361 if (n->af && !*af) 4362 *af = n->af; 4363 prev = n; 4364 n = n->next; 4365 } 4366 } 4367} 4368 4369int 4370invalid_redirect(struct node_host *nh, sa_family_t af) 4371{ 4372 if (!af) { 4373 struct node_host *n; 4374 4375 /* only tables are ok without an address family */ 4376 for (n = nh; n != NULL; n = n->next) { 4377 if (n->addr.type != PF_ADDR_TABLE) { 4378 yyerror("address family not given and " 4379 "translation address expands to multiple " 4380 "address families"); 4381 return (1); 4382 } 4383 } 4384 } 4385 if (nh == NULL) { 4386 yyerror("no translation address with matching address family " 4387 "found."); 4388 return (1); 4389 } 4390 return (0); 4391} 4392 4393int 4394atoul(char *s, u_long *ulvalp) 4395{ 4396 u_long ulval; 4397 char *ep; 4398 4399 errno = 0; 4400 ulval = strtoul(s, &ep, 0); 4401 if (s[0] == '\0' || *ep != '\0') 4402 return (-1); 4403 if (errno == ERANGE && ulval == ULONG_MAX) 4404 return (-1); 4405 *ulvalp = ulval; 4406 return (0); 4407} 4408 4409int 4410getservice(char *n) 4411{ 4412 struct servent *s; 4413 u_long ulval; 4414 4415 if (atoul(n, &ulval) == 0) { 4416 if (ulval > 65535) { 4417 yyerror("illegal port value %d", ulval); 4418 return (-1); 4419 } 4420 return (htons(ulval)); 4421 } else { 4422 s = getservbyname(n, "tcp"); 4423 if (s == NULL) 4424 s = getservbyname(n, "udp"); 4425 if (s == NULL) { 4426 yyerror("unknown port %s", n); 4427 return (-1); 4428 } 4429 return (s->s_port); 4430 } 4431} 4432 4433int 4434rule_label(struct pf_rule *r, char *s) 4435{ 4436 if (s) { 4437 if (strlcpy(r->label, s, sizeof(r->label)) >= 4438 sizeof(r->label)) { 4439 yyerror("rule label too long (max %d chars)", 4440 sizeof(r->label)-1); 4441 return (-1); 4442 } 4443 } 4444 return (0); 4445} 4446 4447u_int16_t 4448parseicmpspec(char *w, sa_family_t af) 4449{ 4450 const struct icmpcodeent *p; 4451 u_long ulval; 4452 u_int8_t icmptype; 4453 4454 if (af == AF_INET) 4455 icmptype = returnicmpdefault >> 8; 4456 else 4457 icmptype = returnicmp6default >> 8; 4458 4459 if (atoul(w, &ulval) == -1) { 4460 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 4461 yyerror("unknown icmp code %s", w); 4462 return (0); 4463 } 4464 ulval = p->code; 4465 } 4466 if (ulval > 255) { 4467 yyerror("invalid icmp code %ld", ulval); 4468 return (0); 4469 } 4470 return (icmptype << 8 | ulval); 4471} 4472 4473int 4474pfctl_load_anchors(int dev, int opts) 4475{ 4476 struct loadanchors *la; 4477 4478 TAILQ_FOREACH(la, &loadanchorshead, entries) { 4479 if (opts & PF_OPT_VERBOSE) 4480 fprintf(stderr, "\nLoading anchor %s:%s from %s\n", 4481 la->anchorname, la->rulesetname, la->filename); 4482 if (pfctl_rules(dev, la->filename, opts, la->anchorname, 4483 la->rulesetname) == -1) 4484 return (-1); 4485 } 4486 4487 return (0); 4488} 4489 4490