parse.y revision 1.422
1/* $OpenBSD: parse.y,v 1.422 2003/11/14 13:51:09 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_NOSYNC=1, PF_STATE_OPT_TIMEOUT=2 }; 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 *, size_t, const char *, const char *); 225void expand_label_if(const char *, char *, size_t, const char *); 226void expand_label_addr(const char *, char *, size_t, u_int8_t, 227 struct node_host *); 228void expand_label_port(const char *, char *, size_t, struct node_port *); 229void expand_label_proto(const char *, char *, size_t, u_int8_t); 230void expand_label_nr(const char *, char *, size_t); 231void expand_label(char *, size_t, const char *, u_int8_t, struct node_host *, 232 struct node_port *, struct node_host *, struct node_port *, 233 u_int8_t); 234void expand_rule(struct pf_rule *, struct node_if *, struct node_host *, 235 struct node_proto *, struct node_os*, struct node_host *, 236 struct node_port *, struct node_host *, struct node_port *, 237 struct node_uid *, struct node_gid *, struct node_icmp *); 238int expand_altq(struct pf_altq *, struct node_if *, struct node_queue *, 239 struct node_queue_bw bwspec, struct node_queue_opt *); 240int expand_queue(struct pf_altq *, struct node_if *, struct node_queue *, 241 struct node_queue_bw, struct node_queue_opt *); 242 243int check_rulestate(int); 244int kw_cmp(const void *, const void *); 245int lookup(char *); 246int lgetc(FILE *); 247int lungetc(int); 248int findeol(void); 249int yylex(void); 250int atoul(char *, u_long *); 251int getservice(char *); 252int rule_label(struct pf_rule *, char *); 253 254TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead); 255struct sym { 256 TAILQ_ENTRY(sym) entries; 257 int used; 258 int persist; 259 char *nam; 260 char *val; 261}; 262 263 264int symset(const char *, const char *, int); 265char *symget(const char *); 266 267void decide_address_family(struct node_host *, sa_family_t *); 268void remove_invalid_hosts(struct node_host **, sa_family_t *); 269int invalid_redirect(struct node_host *, sa_family_t); 270u_int16_t parseicmpspec(char *, sa_family_t); 271 272TAILQ_HEAD(loadanchorshead, loadanchors) loadanchorshead = 273 TAILQ_HEAD_INITIALIZER(loadanchorshead); 274struct loadanchors { 275 TAILQ_ENTRY(loadanchors) entries; 276 char *anchorname; 277 char *rulesetname; 278 char *filename; 279}; 280 281typedef struct { 282 union { 283 u_int32_t number; 284 int i; 285 char *string; 286 struct { 287 u_int8_t b1; 288 u_int8_t b2; 289 u_int16_t w; 290 u_int16_t w2; 291 } b; 292 struct range { 293 int a; 294 int b; 295 int t; 296 } range; 297 struct node_if *interface; 298 struct node_proto *proto; 299 struct node_icmp *icmp; 300 struct node_host *host; 301 struct node_os *os; 302 struct node_port *port; 303 struct node_uid *uid; 304 struct node_gid *gid; 305 struct node_state_opt *state_opt; 306 struct peer peer; 307 struct { 308 struct peer src, dst; 309 struct node_os *src_os; 310 } fromto; 311 struct pf_poolhashkey *hashkey; 312 struct { 313 struct node_host *host; 314 u_int8_t rt; 315 u_int8_t pool_opts; 316 sa_family_t af; 317 struct pf_poolhashkey *key; 318 } route; 319 struct redirection { 320 struct node_host *host; 321 struct range rport; 322 } *redirection; 323 struct { 324 int type; 325 struct pf_poolhashkey *key; 326 } pooltype; 327 struct { 328 int action; 329 struct node_state_opt *options; 330 } keep_state; 331 struct { 332 u_int8_t log; 333 u_int8_t quick; 334 } logquick; 335 struct node_queue *queue; 336 struct node_queue_opt queue_options; 337 struct node_queue_bw queue_bwspec; 338 struct node_qassign qassign; 339 struct filter_opts filter_opts; 340 struct antispoof_opts antispoof_opts; 341 struct queue_opts queue_opts; 342 struct scrub_opts scrub_opts; 343 struct table_opts table_opts; 344 struct node_hfsc_opts hfsc_opts; 345 } v; 346 int lineno; 347} YYSTYPE; 348 349#define PREPARE_ANCHOR_RULE(r, a) \ 350 do { \ 351 memset(&(r), 0, sizeof(r)); \ 352 if (strlcpy(r.anchorname, (a), \ 353 sizeof(r.anchorname)) >= \ 354 sizeof(r.anchorname)) { \ 355 yyerror("anchor name '%s' too long", \ 356 (a)); \ 357 YYERROR; \ 358 } \ 359 } while (0) 360 361%} 362 363%token PASS BLOCK SCRUB RETURN IN OS OUT LOG LOGALL QUICK ON FROM TO FLAGS 364%token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE 365%token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF 366%token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL 367%token NOROUTE FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE 368%token REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR 369%token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY RANDOMID 370%token REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG 371%token ANTISPOOF FOR 372%token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT 373%token ALTQ CBQ PRIQ HFSC BANDWIDTH TBRSIZE LINKSHARE REALTIME UPPERLIMIT 374%token QUEUE PRIORITY QLIMIT 375%token LOAD 376%token TAGGED TAG 377%token <v.string> STRING 378%token <v.i> PORTBINARY 379%type <v.interface> interface if_list if_item_not if_item 380%type <v.number> number icmptype icmp6type uid gid 381%type <v.number> tos not yesno natpass 382%type <v.i> no dir log af fragcache 383%type <v.i> staticport unaryop 384%type <v.b> action nataction flags flag blockspec 385%type <v.range> port rport 386%type <v.hashkey> hashkey 387%type <v.pooltype> pooltype 388%type <v.proto> proto proto_list proto_item 389%type <v.icmp> icmpspec 390%type <v.icmp> icmp_list icmp_item 391%type <v.icmp> icmp6_list icmp6_item 392%type <v.fromto> fromto 393%type <v.peer> ipportspec from to 394%type <v.host> ipspec xhost host dynaddr host_list 395%type <v.host> redir_host_list redirspec 396%type <v.host> route_host route_host_list routespec 397%type <v.os> os xos os_list 398%type <v.port> portspec port_list port_item 399%type <v.uid> uids uid_list uid_item 400%type <v.gid> gids gid_list gid_item 401%type <v.route> route 402%type <v.redirection> redirection redirpool 403%type <v.string> label string tag 404%type <v.keep_state> keep 405%type <v.state_opt> state_opt_spec state_opt_list state_opt_item 406%type <v.logquick> logquick 407%type <v.interface> antispoof_ifspc antispoof_iflst 408%type <v.qassign> qname 409%type <v.queue> qassign qassign_list qassign_item 410%type <v.queue_options> scheduler 411%type <v.number> cbqflags_list cbqflags_item 412%type <v.number> priqflags_list priqflags_item 413%type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts 414%type <v.queue_bwspec> bandwidth 415%type <v.filter_opts> filter_opts filter_opt filter_opts_l 416%type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l 417%type <v.queue_opts> queue_opts queue_opt queue_opts_l 418%type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l 419%type <v.table_opts> table_opts table_opt table_opts_l 420%% 421 422ruleset : /* empty */ 423 | ruleset '\n' 424 | ruleset option '\n' 425 | ruleset scrubrule '\n' 426 | ruleset natrule '\n' 427 | ruleset binatrule '\n' 428 | ruleset pfrule '\n' 429 | ruleset anchorrule '\n' 430 | ruleset loadrule '\n' 431 | ruleset altqif '\n' 432 | ruleset queuespec '\n' 433 | ruleset varset '\n' 434 | ruleset antispoof '\n' 435 | ruleset tabledef '\n' 436 | ruleset error '\n' { errors++; } 437 ; 438 439option : SET OPTIMIZATION STRING { 440 if (check_rulestate(PFCTL_STATE_OPTION)) 441 YYERROR; 442 if (pfctl_set_optimization(pf, $3) != 0) { 443 yyerror("unknown optimization %s", $3); 444 YYERROR; 445 } 446 } 447 | SET TIMEOUT timeout_spec 448 | SET TIMEOUT '{' timeout_list '}' 449 | SET LIMIT limit_spec 450 | SET LIMIT '{' limit_list '}' 451 | SET LOGINTERFACE STRING { 452 if (check_rulestate(PFCTL_STATE_OPTION)) 453 YYERROR; 454 if ((ifa_exists($3) == NULL) && strcmp($3, "none")) { 455 yyerror("interface %s doesn't exist", $3); 456 YYERROR; 457 } 458 if (pfctl_set_logif(pf, $3) != 0) { 459 yyerror("error setting loginterface %s", $3); 460 YYERROR; 461 } 462 } 463 | SET BLOCKPOLICY DROP { 464 if (pf->opts & PF_OPT_VERBOSE) 465 printf("set block-policy drop\n"); 466 if (check_rulestate(PFCTL_STATE_OPTION)) 467 YYERROR; 468 blockpolicy = PFRULE_DROP; 469 } 470 | SET BLOCKPOLICY RETURN { 471 if (pf->opts & PF_OPT_VERBOSE) 472 printf("set block-policy return\n"); 473 if (check_rulestate(PFCTL_STATE_OPTION)) 474 YYERROR; 475 blockpolicy = PFRULE_RETURN; 476 } 477 | SET REQUIREORDER yesno { 478 if (pf->opts & PF_OPT_VERBOSE) 479 printf("set require-order %s\n", 480 $3 == 1 ? "yes" : "no"); 481 require_order = $3; 482 } 483 | SET FINGERPRINTS STRING { 484 if (pf->opts & PF_OPT_VERBOSE) 485 printf("fingerprints %s\n", $3); 486 if (check_rulestate(PFCTL_STATE_OPTION)) 487 YYERROR; 488 if (pfctl_file_fingerprints(pf->dev, pf->opts, $3)) { 489 yyerror("error loading fingerprints %s", $3); 490 YYERROR; 491 } 492 } 493 | SET DEBUG STRING { 494 if (check_rulestate(PFCTL_STATE_OPTION)) 495 YYERROR; 496 if (pfctl_set_debug(pf, $3) != 0) { 497 yyerror("error setting debuglevel %s", $3); 498 YYERROR; 499 } 500 } 501 ; 502 503string : string STRING { 504 if (asprintf(&$$, "%s %s", $1, $2) == -1) 505 err(1, "string: asprintf"); 506 free($1); 507 free($2); 508 } 509 | STRING 510 ; 511 512varset : STRING '=' string { 513 if (pf->opts & PF_OPT_VERBOSE) 514 printf("%s = \"%s\"\n", $1, $3); 515 if (symset($1, $3, 0) == -1) 516 err(1, "cannot store variable %s", $1); 517 } 518 ; 519 520anchorrule : ANCHOR string dir interface af proto fromto { 521 struct pf_rule r; 522 523 if (check_rulestate(PFCTL_STATE_FILTER)) 524 YYERROR; 525 526 PREPARE_ANCHOR_RULE(r, $2); 527 r.direction = $3; 528 r.af = $5; 529 530 decide_address_family($7.src.host, &r.af); 531 decide_address_family($7.dst.host, &r.af); 532 533 expand_rule(&r, $4, NULL, $6, $7.src_os, 534 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 535 0, 0, 0); 536 } 537 | NATANCHOR string interface af proto fromto { 538 struct pf_rule r; 539 540 if (check_rulestate(PFCTL_STATE_NAT)) 541 YYERROR; 542 543 PREPARE_ANCHOR_RULE(r, $2); 544 r.action = PF_NAT; 545 r.af = $4; 546 547 decide_address_family($6.src.host, &r.af); 548 decide_address_family($6.dst.host, &r.af); 549 550 expand_rule(&r, $3, NULL, $5, $6.src_os, 551 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 552 0, 0, 0); 553 } 554 | RDRANCHOR string interface af proto fromto { 555 struct pf_rule r; 556 557 if (check_rulestate(PFCTL_STATE_NAT)) 558 YYERROR; 559 560 PREPARE_ANCHOR_RULE(r, $2); 561 r.action = PF_RDR; 562 r.af = $4; 563 564 decide_address_family($6.src.host, &r.af); 565 decide_address_family($6.dst.host, &r.af); 566 567 if ($6.src.port != NULL) { 568 yyerror("source port parameter not supported" 569 " in rdr-anchor"); 570 YYERROR; 571 } 572 if ($6.dst.port != NULL) { 573 if ($6.dst.port->next != NULL) { 574 yyerror("destination port list " 575 "expansion not supported in " 576 "rdr-anchor"); 577 YYERROR; 578 } else if ($6.dst.port->op != PF_OP_EQ) { 579 yyerror("destination port operators" 580 " not supported in rdr-anchor"); 581 YYERROR; 582 } 583 r.dst.port[0] = $6.dst.port->port[0]; 584 r.dst.port[1] = $6.dst.port->port[1]; 585 r.dst.port_op = $6.dst.port->op; 586 } 587 588 expand_rule(&r, $3, NULL, $5, $6.src_os, 589 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port, 590 0, 0, 0); 591 } 592 | BINATANCHOR string interface af proto fromto { 593 struct pf_rule r; 594 595 if (check_rulestate(PFCTL_STATE_NAT)) 596 YYERROR; 597 598 PREPARE_ANCHOR_RULE(r, $2); 599 r.action = PF_BINAT; 600 r.af = $4; 601 if ($5 != NULL) { 602 if ($5->next != NULL) { 603 yyerror("proto list expansion" 604 " not supported in binat-anchor"); 605 YYERROR; 606 } 607 r.proto = $5->proto; 608 free($5); 609 } 610 611 if ($6.src.host != NULL || $6.src.port != NULL || 612 $6.dst.host != NULL || $6.dst.port != NULL) { 613 yyerror("fromto parameter not supported" 614 " in binat-anchor"); 615 YYERROR; 616 } 617 618 decide_address_family($6.src.host, &r.af); 619 decide_address_family($6.dst.host, &r.af); 620 621 pfctl_add_rule(pf, &r); 622 } 623 ; 624 625loadrule : LOAD ANCHOR string FROM string { 626 char *t; 627 struct loadanchors *loadanchor; 628 629 t = strsep(&$3, ":"); 630 if (*t == '\0' || *$3 == '\0') { 631 yyerror("anchor '%s' invalid\n", $3); 632 YYERROR; 633 } 634 if (strlen(t) >= PF_ANCHOR_NAME_SIZE) { 635 yyerror("anchorname %s too long, max %u\n", 636 t, PF_ANCHOR_NAME_SIZE - 1); 637 YYERROR; 638 } 639 if (strlen($3) >= PF_RULESET_NAME_SIZE) { 640 yyerror("rulesetname %s too long, max %u\n", 641 $3, PF_RULESET_NAME_SIZE - 1); 642 YYERROR; 643 } 644 645 loadanchor = calloc(1, sizeof(struct loadanchors)); 646 if (loadanchor == NULL) 647 err(1, "loadrule: calloc"); 648 if ((loadanchor->anchorname = strdup(t)) == NULL) 649 err(1, "loadrule: strdup"); 650 if ((loadanchor->rulesetname = strdup($3)) == NULL) 651 err(1, "loadrule: strdup"); 652 if ((loadanchor->filename = strdup($5)) == NULL) 653 err(1, "loadrule: strdup"); 654 655 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor, 656 entries); 657 658 free(t); /* not $3 */ 659 free($5); 660 }; 661 662scrubrule : SCRUB dir logquick interface af proto fromto scrub_opts 663 { 664 struct pf_rule r; 665 666 if (check_rulestate(PFCTL_STATE_SCRUB)) 667 YYERROR; 668 669 memset(&r, 0, sizeof(r)); 670 671 r.action = PF_SCRUB; 672 r.direction = $2; 673 674 r.log = $3.log; 675 if ($3.quick) { 676 yyerror("scrub rules do not support 'quick'"); 677 YYERROR; 678 } 679 680 if ($4) { 681 if ($4->not) { 682 yyerror("scrub rules do not support " 683 "'! <if>'"); 684 YYERROR; 685 } 686 } 687 r.af = $5; 688 if ($8.nodf) 689 r.rule_flag |= PFRULE_NODF; 690 if ($8.randomid) 691 r.rule_flag |= PFRULE_RANDOMID; 692 if ($8.reassemble_tcp) { 693 if (r.direction != PF_INOUT) { 694 yyerror("reassemble tcp rules can not " 695 "specify direction"); 696 YYERROR; 697 } 698 r.rule_flag |= PFRULE_REASSEMBLE_TCP; 699 } 700 if ($8.minttl) 701 r.min_ttl = $8.minttl; 702 if ($8.maxmss) 703 r.max_mss = $8.maxmss; 704 if ($8.fragcache) 705 r.rule_flag |= $8.fragcache; 706 707 expand_rule(&r, $4, NULL, $6, $7.src_os, 708 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port, 709 NULL, NULL, NULL); 710 } 711 ; 712 713scrub_opts : { 714 bzero(&scrub_opts, sizeof scrub_opts); 715 } 716 scrub_opts_l 717 { $$ = scrub_opts; } 718 | /* empty */ { 719 bzero(&scrub_opts, sizeof scrub_opts); 720 $$ = scrub_opts; 721 } 722 ; 723 724scrub_opts_l : scrub_opts_l scrub_opt 725 | scrub_opt 726 ; 727 728scrub_opt : NODF { 729 if (scrub_opts.nodf) { 730 yyerror("no-df cannot be respecified"); 731 YYERROR; 732 } 733 scrub_opts.nodf = 1; 734 } 735 | MINTTL number { 736 if (scrub_opts.marker & SOM_MINTTL) { 737 yyerror("min-ttl cannot be respecified"); 738 YYERROR; 739 } 740 if ($2 > 255) { 741 yyerror("illegal min-ttl value %d", $2); 742 YYERROR; 743 } 744 scrub_opts.marker |= SOM_MINTTL; 745 scrub_opts.minttl = $2; 746 } 747 | MAXMSS number { 748 if (scrub_opts.marker & SOM_MAXMSS) { 749 yyerror("max-mss cannot be respecified"); 750 YYERROR; 751 } 752 if ($2 > 65535) { 753 yyerror("illegal max-mss value %d", $2); 754 YYERROR; 755 } 756 scrub_opts.marker |= SOM_MAXMSS; 757 scrub_opts.maxmss = $2; 758 } 759 | fragcache { 760 if (scrub_opts.marker & SOM_FRAGCACHE) { 761 yyerror("fragcache cannot be respecified"); 762 YYERROR; 763 } 764 scrub_opts.marker |= SOM_FRAGCACHE; 765 scrub_opts.fragcache = $1; 766 } 767 | REASSEMBLE STRING { 768 if (strcasecmp($2, "tcp") != 0) 769 YYERROR; 770 if (scrub_opts.reassemble_tcp) { 771 yyerror("reassemble tcp cannot be respecified"); 772 YYERROR; 773 } 774 scrub_opts.reassemble_tcp = 1; 775 } 776 | RANDOMID { 777 if (scrub_opts.randomid) { 778 yyerror("random-id cannot be respecified"); 779 YYERROR; 780 } 781 scrub_opts.randomid = 1; 782 } 783 ; 784 785fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ } 786 | FRAGMENT FRAGCROP { $$ = PFRULE_FRAGCROP; } 787 | FRAGMENT FRAGDROP { $$ = PFRULE_FRAGDROP; } 788 ; 789 790antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts { 791 struct pf_rule r; 792 struct node_host *h = NULL; 793 struct node_if *i, *j; 794 795 if (check_rulestate(PFCTL_STATE_FILTER)) 796 YYERROR; 797 798 for (i = $3; i; i = i->next) { 799 bzero(&r, sizeof(r)); 800 801 r.action = PF_DROP; 802 r.direction = PF_IN; 803 r.log = $2.log; 804 r.quick = $2.quick; 805 r.af = $4; 806 if (rule_label(&r, $5.label)) 807 YYERROR; 808 j = calloc(1, sizeof(struct node_if)); 809 if (j == NULL) 810 err(1, "antispoof: calloc"); 811 if (strlcpy(j->ifname, i->ifname, 812 sizeof(j->ifname)) >= sizeof(j->ifname)) { 813 free(j); 814 yyerror("interface name too long"); 815 YYERROR; 816 } 817 j->not = 1; 818 h = ifa_lookup(j->ifname, PFCTL_IFLOOKUP_NET); 819 820 expand_rule(&r, j, NULL, NULL, NULL, h, NULL, 821 NULL, NULL, NULL, NULL, NULL); 822 823 if ((i->ifa_flags & IFF_LOOPBACK) == 0) { 824 bzero(&r, sizeof(r)); 825 826 r.action = PF_DROP; 827 r.direction = PF_IN; 828 r.log = $2.log; 829 r.quick = $2.quick; 830 r.af = $4; 831 if (rule_label(&r, $5.label)) 832 YYERROR; 833 h = ifa_lookup(i->ifname, 834 PFCTL_IFLOOKUP_HOST); 835 expand_rule(&r, NULL, NULL, NULL, NULL, 836 h, NULL, NULL, NULL, NULL, NULL, 837 NULL); 838 } 839 } 840 free($5.label); 841 } 842 ; 843 844antispoof_ifspc : FOR if_item { $$ = $2; } 845 | FOR '{' antispoof_iflst '}' { $$ = $3; } 846 ; 847 848antispoof_iflst : if_item { $$ = $1; } 849 | antispoof_iflst comma if_item { 850 $1->tail->next = $3; 851 $1->tail = $3; 852 $$ = $1; 853 } 854 ; 855 856antispoof_opts : { bzero(&antispoof_opts, sizeof antispoof_opts); } 857 antispoof_opts_l 858 { $$ = antispoof_opts; } 859 | /* empty */ { 860 bzero(&antispoof_opts, sizeof antispoof_opts); 861 $$ = antispoof_opts; 862 } 863 ; 864 865antispoof_opts_l : antispoof_opts_l antispoof_opt 866 | antispoof_opt 867 ; 868 869antispoof_opt : label { 870 if (antispoof_opts.label) { 871 yyerror("label cannot be redefined"); 872 YYERROR; 873 } 874 antispoof_opts.label = $1; 875 } 876 ; 877 878not : '!' { $$ = 1; } 879 | /* empty */ { $$ = 0; } 880 881tabledef : TABLE '<' STRING '>' table_opts { 882 struct node_host *h, *nh; 883 struct node_tinit *ti, *nti; 884 885 if (strlen($3) >= PF_TABLE_NAME_SIZE) { 886 yyerror("table name too long, max %d chars", 887 PF_TABLE_NAME_SIZE - 1); 888 YYERROR; 889 } 890 if (pf->loadopt & PFCTL_FLAG_TABLE) 891 if (process_tabledef($3, &$5)) 892 YYERROR; 893 for (ti = SIMPLEQ_FIRST(&$5.init_nodes); 894 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) { 895 if (ti->file) 896 free(ti->file); 897 for (h = ti->host; h != NULL; h = nh) { 898 nh = h->next; 899 free(h); 900 } 901 nti = SIMPLEQ_NEXT(ti, entries); 902 free (ti); 903 } 904 } 905 ; 906 907table_opts : { 908 bzero(&table_opts, sizeof table_opts); 909 SIMPLEQ_INIT(&table_opts.init_nodes); 910 } 911 table_opts_l 912 { $$ = table_opts; } 913 | /* empty */ 914 { 915 bzero(&table_opts, sizeof table_opts); 916 SIMPLEQ_INIT(&table_opts.init_nodes); 917 $$ = table_opts; 918 } 919 ; 920 921table_opts_l : table_opts_l table_opt 922 | table_opt 923 ; 924 925table_opt : STRING { 926 if (!strcmp($1, "const")) 927 table_opts.flags |= PFR_TFLAG_CONST; 928 else if (!strcmp($1, "persist")) 929 table_opts.flags |= PFR_TFLAG_PERSIST; 930 else 931 YYERROR; 932 } 933 | '{' '}' { table_opts.init_addr = 1; } 934 | '{' host_list '}' { 935 struct node_host *n; 936 struct node_tinit *ti; 937 938 for (n = $2; n != NULL; n = n->next) { 939 switch(n->addr.type) { 940 case PF_ADDR_ADDRMASK: 941 continue; /* ok */ 942 case PF_ADDR_DYNIFTL: 943 yyerror("dynamic addresses are not " 944 "permitted inside tables"); 945 break; 946 case PF_ADDR_TABLE: 947 yyerror("tables cannot contain tables"); 948 break; 949 case PF_ADDR_NOROUTE: 950 yyerror("\"no-route\" is not permitted " 951 "inside tables"); 952 break; 953 default: 954 yyerror("unknown address type %d", 955 n->addr.type); 956 } 957 YYERROR; 958 } 959 if (!(ti = calloc(1, sizeof(*ti)))) 960 err(1, "table_opt: calloc"); 961 ti->host = $2; 962 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 963 entries); 964 table_opts.init_addr = 1; 965 } 966 | FILENAME STRING { 967 struct node_tinit *ti; 968 969 if (!(ti = calloc(1, sizeof(*ti)))) 970 err(1, "table_opt: calloc"); 971 ti->file = $2; 972 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti, 973 entries); 974 table_opts.init_addr = 1; 975 } 976 ; 977 978altqif : ALTQ interface queue_opts QUEUE qassign { 979 struct pf_altq a; 980 981 if (check_rulestate(PFCTL_STATE_QUEUE)) 982 YYERROR; 983 984 memset(&a, 0, sizeof(a)); 985 if ($3.scheduler.qtype == ALTQT_NONE) { 986 yyerror("no scheduler specified!"); 987 YYERROR; 988 } 989 a.scheduler = $3.scheduler.qtype; 990 a.qlimit = $3.qlimit; 991 a.tbrsize = $3.tbrsize; 992 if ($5 == NULL) { 993 yyerror("no child queues specified"); 994 YYERROR; 995 } 996 if (expand_altq(&a, $2, $5, $3.queue_bwspec, 997 &$3.scheduler)) 998 YYERROR; 999 } 1000 ; 1001 1002queuespec : QUEUE STRING interface queue_opts qassign { 1003 struct pf_altq a; 1004 1005 if (check_rulestate(PFCTL_STATE_QUEUE)) 1006 YYERROR; 1007 1008 memset(&a, 0, sizeof(a)); 1009 1010 if (strlcpy(a.qname, $2, sizeof(a.qname)) >= 1011 sizeof(a.qname)) { 1012 yyerror("queue name too long (max " 1013 "%d chars)", PF_QNAME_SIZE-1); 1014 YYERROR; 1015 } 1016 if ($4.tbrsize) { 1017 yyerror("cannot specify tbrsize for queue"); 1018 YYERROR; 1019 } 1020 if ($4.priority > 255) { 1021 yyerror("priority out of range: max 255"); 1022 YYERROR; 1023 } 1024 a.priority = $4.priority; 1025 a.qlimit = $4.qlimit; 1026 a.scheduler = $4.scheduler.qtype; 1027 if (expand_queue(&a, $3, $5, $4.queue_bwspec, 1028 &$4.scheduler)) { 1029 yyerror("errors in queue definition"); 1030 YYERROR; 1031 } 1032 } 1033 ; 1034 1035queue_opts : { 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 } 1042 queue_opts_l 1043 { $$ = queue_opts; } 1044 | /* empty */ { 1045 bzero(&queue_opts, sizeof queue_opts); 1046 queue_opts.priority = DEFAULT_PRIORITY; 1047 queue_opts.qlimit = DEFAULT_QLIMIT; 1048 queue_opts.scheduler.qtype = ALTQT_NONE; 1049 queue_opts.queue_bwspec.bw_percent = 100; 1050 $$ = queue_opts; 1051 } 1052 ; 1053 1054queue_opts_l : queue_opts_l queue_opt 1055 | queue_opt 1056 ; 1057 1058queue_opt : BANDWIDTH bandwidth { 1059 if (queue_opts.marker & QOM_BWSPEC) { 1060 yyerror("bandwidth cannot be respecified"); 1061 YYERROR; 1062 } 1063 queue_opts.marker |= QOM_BWSPEC; 1064 queue_opts.queue_bwspec = $2; 1065 } 1066 | PRIORITY number { 1067 if (queue_opts.marker & QOM_PRIORITY) { 1068 yyerror("priority cannot be respecified"); 1069 YYERROR; 1070 } 1071 if ($2 > 255) { 1072 yyerror("priority out of range: max 255"); 1073 YYERROR; 1074 } 1075 queue_opts.marker |= QOM_PRIORITY; 1076 queue_opts.priority = $2; 1077 } 1078 | QLIMIT number { 1079 if (queue_opts.marker & QOM_QLIMIT) { 1080 yyerror("qlimit cannot be respecified"); 1081 YYERROR; 1082 } 1083 if ($2 > 65535) { 1084 yyerror("qlimit out of range: max 65535"); 1085 YYERROR; 1086 } 1087 queue_opts.marker |= QOM_QLIMIT; 1088 queue_opts.qlimit = $2; 1089 } 1090 | scheduler { 1091 if (queue_opts.marker & QOM_SCHEDULER) { 1092 yyerror("scheduler cannot be respecified"); 1093 YYERROR; 1094 } 1095 queue_opts.marker |= QOM_SCHEDULER; 1096 queue_opts.scheduler = $1; 1097 } 1098 | TBRSIZE number { 1099 if (queue_opts.marker & QOM_TBRSIZE) { 1100 yyerror("tbrsize cannot be respecified"); 1101 YYERROR; 1102 } 1103 if ($2 > 65535) { 1104 yyerror("tbrsize too big: max 65535"); 1105 YYERROR; 1106 } 1107 queue_opts.marker |= QOM_TBRSIZE; 1108 queue_opts.tbrsize = $2; 1109 } 1110 ; 1111 1112bandwidth : STRING { 1113 double bps; 1114 char *cp; 1115 1116 $$.bw_percent = 0; 1117 1118 bps = strtod($1, &cp); 1119 if (cp != NULL) { 1120 if (!strcmp(cp, "b")) 1121 ; /* nothing */ 1122 else if (!strcmp(cp, "Kb")) 1123 bps *= 1000; 1124 else if (!strcmp(cp, "Mb")) 1125 bps *= 1000 * 1000; 1126 else if (!strcmp(cp, "Gb")) 1127 bps *= 1000 * 1000 * 1000; 1128 else if (!strcmp(cp, "%")) { 1129 if (bps < 0 || bps > 100) { 1130 yyerror("bandwidth spec " 1131 "out of range"); 1132 YYERROR; 1133 } 1134 $$.bw_percent = bps; 1135 bps = 0; 1136 } else { 1137 yyerror("unknown unit %s", cp); 1138 YYERROR; 1139 } 1140 } 1141 $$.bw_absolute = (u_int32_t)bps; 1142 } 1143 1144scheduler : CBQ { 1145 $$.qtype = ALTQT_CBQ; 1146 $$.data.cbq_opts.flags = 0; 1147 } 1148 | CBQ '(' cbqflags_list ')' { 1149 $$.qtype = ALTQT_CBQ; 1150 $$.data.cbq_opts.flags = $3; 1151 } 1152 | PRIQ { 1153 $$.qtype = ALTQT_PRIQ; 1154 $$.data.priq_opts.flags = 0; 1155 } 1156 | PRIQ '(' priqflags_list ')' { 1157 $$.qtype = ALTQT_PRIQ; 1158 $$.data.priq_opts.flags = $3; 1159 } 1160 | HFSC { 1161 $$.qtype = ALTQT_HFSC; 1162 bzero(&$$.data.hfsc_opts, 1163 sizeof(struct node_hfsc_opts)); 1164 } 1165 | HFSC '(' hfsc_opts ')' { 1166 $$.qtype = ALTQT_HFSC; 1167 $$.data.hfsc_opts = $3; 1168 } 1169 ; 1170 1171cbqflags_list : cbqflags_item { $$ |= $1; } 1172 | cbqflags_list comma cbqflags_item { $$ |= $3; } 1173 ; 1174 1175cbqflags_item : STRING { 1176 if (!strcmp($1, "default")) 1177 $$ = CBQCLF_DEFCLASS; 1178 else if (!strcmp($1, "borrow")) 1179 $$ = CBQCLF_BORROW; 1180 else if (!strcmp($1, "red")) 1181 $$ = CBQCLF_RED; 1182 else if (!strcmp($1, "ecn")) 1183 $$ = CBQCLF_RED|CBQCLF_ECN; 1184 else if (!strcmp($1, "rio")) 1185 $$ = CBQCLF_RIO; 1186 else { 1187 yyerror("unknown cbq flag \"%s\"", $1); 1188 YYERROR; 1189 } 1190 } 1191 ; 1192 1193priqflags_list : priqflags_item { $$ |= $1; } 1194 | priqflags_list comma priqflags_item { $$ |= $3; } 1195 ; 1196 1197priqflags_item : STRING { 1198 if (!strcmp($1, "default")) 1199 $$ = PRCF_DEFAULTCLASS; 1200 else if (!strcmp($1, "red")) 1201 $$ = PRCF_RED; 1202 else if (!strcmp($1, "ecn")) 1203 $$ = PRCF_RED|PRCF_ECN; 1204 else if (!strcmp($1, "rio")) 1205 $$ = PRCF_RIO; 1206 else { 1207 yyerror("unknown priq flag \"%s\"", $1); 1208 YYERROR; 1209 } 1210 } 1211 ; 1212 1213hfsc_opts : { 1214 bzero(&hfsc_opts, 1215 sizeof(struct node_hfsc_opts)); 1216 } 1217 hfscopts_list { 1218 $$ = hfsc_opts; 1219 } 1220 ; 1221 1222hfscopts_list : hfscopts_item 1223 | hfscopts_list comma hfscopts_item 1224 ; 1225 1226hfscopts_item : LINKSHARE bandwidth { 1227 if (hfsc_opts.linkshare.used) { 1228 yyerror("linkshare already specified"); 1229 YYERROR; 1230 } 1231 hfsc_opts.linkshare.m2 = $2; 1232 hfsc_opts.linkshare.used = 1; 1233 } 1234 | LINKSHARE '(' bandwidth number bandwidth ')' { 1235 if (hfsc_opts.linkshare.used) { 1236 yyerror("linkshare already specified"); 1237 YYERROR; 1238 } 1239 hfsc_opts.linkshare.m1 = $3; 1240 hfsc_opts.linkshare.d = $4; 1241 hfsc_opts.linkshare.m2 = $5; 1242 hfsc_opts.linkshare.used = 1; 1243 } 1244 | REALTIME bandwidth { 1245 if (hfsc_opts.realtime.used) { 1246 yyerror("realtime already specified"); 1247 YYERROR; 1248 } 1249 hfsc_opts.realtime.m2 = $2; 1250 hfsc_opts.realtime.used = 1; 1251 } 1252 | REALTIME '(' bandwidth number bandwidth ')' { 1253 if (hfsc_opts.realtime.used) { 1254 yyerror("realtime already specified"); 1255 YYERROR; 1256 } 1257 hfsc_opts.realtime.m1 = $3; 1258 hfsc_opts.realtime.d = $4; 1259 hfsc_opts.realtime.m2 = $5; 1260 hfsc_opts.realtime.used = 1; 1261 } 1262 | UPPERLIMIT bandwidth { 1263 if (hfsc_opts.upperlimit.used) { 1264 yyerror("upperlimit already specified"); 1265 YYERROR; 1266 } 1267 hfsc_opts.upperlimit.m2 = $2; 1268 hfsc_opts.upperlimit.used = 1; 1269 } 1270 | UPPERLIMIT '(' bandwidth number bandwidth ')' { 1271 if (hfsc_opts.upperlimit.used) { 1272 yyerror("upperlimit already specified"); 1273 YYERROR; 1274 } 1275 hfsc_opts.upperlimit.m1 = $3; 1276 hfsc_opts.upperlimit.d = $4; 1277 hfsc_opts.upperlimit.m2 = $5; 1278 hfsc_opts.upperlimit.used = 1; 1279 } 1280 | STRING { 1281 if (!strcmp($1, "default")) 1282 hfsc_opts.flags |= HFCF_DEFAULTCLASS; 1283 else if (!strcmp($1, "red")) 1284 hfsc_opts.flags |= HFCF_RED; 1285 else if (!strcmp($1, "ecn")) 1286 hfsc_opts.flags |= HFCF_RED|HFCF_ECN; 1287 else if (!strcmp($1, "rio")) 1288 hfsc_opts.flags |= HFCF_RIO; 1289 else { 1290 yyerror("unknown hfsc flag \"%s\"", $1); 1291 YYERROR; 1292 } 1293 } 1294 ; 1295 1296qassign : /* empty */ { $$ = NULL; } 1297 | qassign_item { $$ = $1; } 1298 | '{' qassign_list '}' { $$ = $2; } 1299 ; 1300 1301qassign_list : qassign_item { $$ = $1; } 1302 | qassign_list comma qassign_item { 1303 $1->tail->next = $3; 1304 $1->tail = $3; 1305 $$ = $1; 1306 } 1307 ; 1308 1309qassign_item : STRING { 1310 $$ = calloc(1, sizeof(struct node_queue)); 1311 if ($$ == NULL) 1312 err(1, "qassign_item: calloc"); 1313 if (strlcpy($$->queue, $1, sizeof($$->queue)) >= 1314 sizeof($$->queue)) { 1315 free($$); 1316 yyerror("queue name '%s' too long (max " 1317 "%d chars)", $1, sizeof($$->queue)-1); 1318 YYERROR; 1319 } 1320 $$->next = NULL; 1321 $$->tail = $$; 1322 } 1323 ; 1324 1325pfrule : action dir logquick interface route af proto fromto 1326 filter_opts 1327 { 1328 struct pf_rule r; 1329 struct node_state_opt *o; 1330 struct node_proto *proto; 1331 1332 if (check_rulestate(PFCTL_STATE_FILTER)) 1333 YYERROR; 1334 1335 memset(&r, 0, sizeof(r)); 1336 1337 r.action = $1.b1; 1338 switch ($1.b2) { 1339 case PFRULE_RETURNRST: 1340 r.rule_flag |= PFRULE_RETURNRST; 1341 r.return_ttl = $1.w; 1342 break; 1343 case PFRULE_RETURNICMP: 1344 r.rule_flag |= PFRULE_RETURNICMP; 1345 r.return_icmp = $1.w; 1346 r.return_icmp6 = $1.w2; 1347 break; 1348 case PFRULE_RETURN: 1349 r.rule_flag |= PFRULE_RETURN; 1350 r.return_icmp = $1.w; 1351 r.return_icmp6 = $1.w2; 1352 break; 1353 } 1354 r.direction = $2; 1355 r.log = $3.log; 1356 r.quick = $3.quick; 1357 1358 r.af = $6; 1359 if ($9.tag) 1360 if (strlcpy(r.tagname, $9.tag, 1361 PF_TAG_NAME_SIZE) > PF_TAG_NAME_SIZE) { 1362 yyerror("tag too long, max %u chars", 1363 PF_TAG_NAME_SIZE - 1); 1364 YYERROR; 1365 } 1366 if ($9.match_tag) 1367 if (strlcpy(r.match_tagname, $9.match_tag, 1368 PF_TAG_NAME_SIZE) > PF_TAG_NAME_SIZE) { 1369 yyerror("tag too long, max %u chars", 1370 PF_TAG_NAME_SIZE - 1); 1371 YYERROR; 1372 } 1373 r.match_tag_not = $9.match_tag_not; 1374 r.flags = $9.flags.b1; 1375 r.flagset = $9.flags.b2; 1376 if (rule_label(&r, $9.label)) 1377 YYERROR; 1378 free($9.label); 1379 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) { 1380 for (proto = $7; proto != NULL && 1381 proto->proto != IPPROTO_TCP; 1382 proto = proto->next) 1383 ; /* nothing */ 1384 if (proto == NULL && $7 != NULL) { 1385 if ($9.flags.b1 || $9.flags.b2) 1386 yyerror( 1387 "flags only apply to tcp"); 1388 if ($8.src_os) 1389 yyerror( 1390 "OS fingerprinting only " 1391 "apply to tcp"); 1392 YYERROR; 1393 } 1394#if 0 1395 if (($9.flags.b1 & parse_flags("S")) == 0 && 1396 $8.src_os) { 1397 yyerror("OS fingerprinting requires " 1398 "the SYN TCP flag (flags S/SA)"); 1399 YYERROR; 1400 } 1401#endif 1402 } 1403 1404 r.tos = $9.tos; 1405 r.keep_state = $9.keep.action; 1406 o = $9.keep.options; 1407 while (o) { 1408 struct node_state_opt *p = o; 1409 1410 switch (o->type) { 1411 case PF_STATE_OPT_MAX: 1412 if (r.max_states) { 1413 yyerror("state option 'max' " 1414 "multiple definitions"); 1415 YYERROR; 1416 } 1417 r.max_states = o->data.max_states; 1418 break; 1419 case PF_STATE_OPT_NOSYNC: 1420 if (r.rule_flag & PFRULE_NOSYNC) { 1421 yyerror("state option 'sync' " 1422 "multiple definitions"); 1423 YYERROR; 1424 } 1425 r.rule_flag |= PFRULE_NOSYNC; 1426 break; 1427 case PF_STATE_OPT_TIMEOUT: 1428 if (r.timeout[o->data.timeout.number]) { 1429 yyerror("state timeout %s " 1430 "multiple definitions", 1431 pf_timeouts[o->data. 1432 timeout.number].name); 1433 YYERROR; 1434 } 1435 r.timeout[o->data.timeout.number] = 1436 o->data.timeout.seconds; 1437 } 1438 o = o->next; 1439 free(p); 1440 } 1441 1442 if ($9.fragment) 1443 r.rule_flag |= PFRULE_FRAGMENT; 1444 r.allow_opts = $9.allowopts; 1445 1446 decide_address_family($8.src.host, &r.af); 1447 decide_address_family($8.dst.host, &r.af); 1448 1449 if ($5.rt) { 1450 if (!r.direction) { 1451 yyerror("direction must be explicit " 1452 "with rules that specify routing"); 1453 YYERROR; 1454 } 1455 r.rt = $5.rt; 1456 r.rpool.opts = $5.pool_opts; 1457 if ($5.key != NULL) 1458 memcpy(&r.rpool.key, $5.key, 1459 sizeof(struct pf_poolhashkey)); 1460 } 1461 if (r.rt && r.rt != PF_FASTROUTE) { 1462 decide_address_family($5.host, &r.af); 1463 remove_invalid_hosts(&$5.host, &r.af); 1464 if ($5.host == NULL) { 1465 yyerror("no routing address with " 1466 "matching address family found."); 1467 YYERROR; 1468 } 1469 if (r.rpool.opts == PF_POOL_NONE && ( 1470 $5.host->next != NULL || 1471 $5.host->addr.type == PF_ADDR_TABLE)) 1472 r.rpool.opts = PF_POOL_ROUNDROBIN; 1473 if (r.rpool.opts != PF_POOL_ROUNDROBIN) 1474 if (disallow_table($5.host, "tables " 1475 "are only supported in round-robin " 1476 "routing pools")) 1477 YYERROR; 1478 if ($5.host->next != NULL) { 1479 if (r.rpool.opts != 1480 PF_POOL_ROUNDROBIN) { 1481 yyerror("r.rpool.opts must " 1482 "be PF_POOL_ROUNDROBIN"); 1483 YYERROR; 1484 } 1485 } 1486 } 1487 if ($9.queues.qname != NULL) { 1488 if (strlcpy(r.qname, $9.queues.qname, 1489 sizeof(r.qname)) >= sizeof(r.qname)) { 1490 yyerror("rule qname too long (max " 1491 "%d chars)", sizeof(r.qname)-1); 1492 YYERROR; 1493 } 1494 free($9.queues.qname); 1495 } 1496 if ($9.queues.pqname != NULL) { 1497 if (strlcpy(r.pqname, $9.queues.pqname, 1498 sizeof(r.pqname)) >= sizeof(r.pqname)) { 1499 yyerror("rule pqname too long (max " 1500 "%d chars)", sizeof(r.pqname)-1); 1501 YYERROR; 1502 } 1503 free($9.queues.pqname); 1504 } 1505 1506 expand_rule(&r, $4, $5.host, $7, $8.src_os, 1507 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port, 1508 $9.uid, $9.gid, $9.icmpspec); 1509 } 1510 ; 1511 1512filter_opts : { bzero(&filter_opts, sizeof filter_opts); } 1513 filter_opts_l 1514 { $$ = filter_opts; } 1515 | /* empty */ { 1516 bzero(&filter_opts, sizeof filter_opts); 1517 $$ = filter_opts; 1518 } 1519 ; 1520 1521filter_opts_l : filter_opts_l filter_opt 1522 | filter_opt 1523 ; 1524 1525filter_opt : USER uids { 1526 if (filter_opts.uid) 1527 $2->tail->next = filter_opts.uid; 1528 filter_opts.uid = $2; 1529 } 1530 | GROUP gids { 1531 if (filter_opts.gid) 1532 $2->tail->next = filter_opts.gid; 1533 filter_opts.gid = $2; 1534 } 1535 | flags { 1536 if (filter_opts.marker & FOM_FLAGS) { 1537 yyerror("flags cannot be redefined"); 1538 YYERROR; 1539 } 1540 filter_opts.marker |= FOM_FLAGS; 1541 filter_opts.flags.b1 |= $1.b1; 1542 filter_opts.flags.b2 |= $1.b2; 1543 filter_opts.flags.w |= $1.w; 1544 filter_opts.flags.w2 |= $1.w2; 1545 } 1546 | icmpspec { 1547 if (filter_opts.marker & FOM_ICMP) { 1548 yyerror("icmp-type cannot be redefined"); 1549 YYERROR; 1550 } 1551 filter_opts.marker |= FOM_ICMP; 1552 filter_opts.icmpspec = $1; 1553 } 1554 | tos { 1555 if (filter_opts.marker & FOM_TOS) { 1556 yyerror("tos cannot be redefined"); 1557 YYERROR; 1558 } 1559 filter_opts.marker |= FOM_TOS; 1560 filter_opts.tos = $1; 1561 } 1562 | keep { 1563 if (filter_opts.marker & FOM_KEEP) { 1564 yyerror("modulate or keep cannot be redefined"); 1565 YYERROR; 1566 } 1567 filter_opts.marker |= FOM_KEEP; 1568 filter_opts.keep.action = $1.action; 1569 filter_opts.keep.options = $1.options; 1570 } 1571 | FRAGMENT { 1572 filter_opts.fragment = 1; 1573 } 1574 | ALLOWOPTS { 1575 filter_opts.allowopts = 1; 1576 } 1577 | label { 1578 if (filter_opts.label) { 1579 yyerror("label cannot be redefined"); 1580 YYERROR; 1581 } 1582 filter_opts.label = $1; 1583 } 1584 | qname { 1585 if (filter_opts.queues.qname) { 1586 yyerror("queue cannot be redefined"); 1587 YYERROR; 1588 } 1589 filter_opts.queues = $1; 1590 } 1591 | TAG string { 1592 filter_opts.tag = $2; 1593 } 1594 | not TAGGED string { 1595 filter_opts.match_tag = $3; 1596 filter_opts.match_tag_not = $1; 1597 } 1598 ; 1599 1600action : PASS { $$.b1 = PF_PASS; $$.b2 = $$.w = 0; } 1601 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; } 1602 ; 1603 1604blockspec : /* empty */ { 1605 $$.b2 = blockpolicy; 1606 $$.w = returnicmpdefault; 1607 $$.w2 = returnicmp6default; 1608 } 1609 | DROP { 1610 $$.b2 = PFRULE_DROP; 1611 $$.w = 0; 1612 $$.w2 = 0; 1613 } 1614 | RETURNRST { 1615 $$.b2 = PFRULE_RETURNRST; 1616 $$.w = 0; 1617 $$.w2 = 0; 1618 } 1619 | RETURNRST '(' TTL number ')' { 1620 if ($4 > 255) { 1621 yyerror("illegal ttl value %d", $4); 1622 YYERROR; 1623 } 1624 $$.b2 = PFRULE_RETURNRST; 1625 $$.w = $4; 1626 $$.w2 = 0; 1627 } 1628 | RETURNICMP { 1629 $$.b2 = PFRULE_RETURNICMP; 1630 $$.w = returnicmpdefault; 1631 $$.w2 = returnicmp6default; 1632 } 1633 | RETURNICMP6 { 1634 $$.b2 = PFRULE_RETURNICMP; 1635 $$.w = returnicmpdefault; 1636 $$.w2 = returnicmp6default; 1637 } 1638 | RETURNICMP '(' STRING ')' { 1639 $$.b2 = PFRULE_RETURNICMP; 1640 if (!($$.w = parseicmpspec($3, AF_INET))) 1641 YYERROR; 1642 $$.w2 = returnicmp6default; 1643 } 1644 | RETURNICMP6 '(' STRING ')' { 1645 $$.b2 = PFRULE_RETURNICMP; 1646 $$.w = returnicmpdefault; 1647 if (!($$.w2 = parseicmpspec($3, AF_INET6))) 1648 YYERROR; 1649 } 1650 | RETURNICMP '(' STRING comma STRING ')' { 1651 $$.b2 = PFRULE_RETURNICMP; 1652 if (!($$.w = parseicmpspec($3, AF_INET))) 1653 YYERROR; 1654 if (!($$.w2 = parseicmpspec($5, AF_INET6))) 1655 YYERROR; 1656 } 1657 | RETURN { 1658 $$.b2 = PFRULE_RETURN; 1659 $$.w = returnicmpdefault; 1660 $$.w2 = returnicmp6default; 1661 } 1662 ; 1663 1664dir : /* empty */ { $$ = 0; } 1665 | IN { $$ = PF_IN; } 1666 | OUT { $$ = PF_OUT; } 1667 ; 1668 1669logquick : /* empty */ { $$.log = 0; $$.quick = 0; } 1670 | log { $$.log = $1; $$.quick = 0; } 1671 | QUICK { $$.log = 0; $$.quick = 1; } 1672 | log QUICK { $$.log = $1; $$.quick = 1; } 1673 | QUICK log { $$.log = $2; $$.quick = 1; } 1674 ; 1675 1676log : LOG { $$ = 1; } 1677 | LOGALL { $$ = 2; } 1678 ; 1679 1680interface : /* empty */ { $$ = NULL; } 1681 | ON if_item_not { $$ = $2; } 1682 | ON '{' if_list '}' { $$ = $3; } 1683 ; 1684 1685if_list : if_item_not { $$ = $1; } 1686 | if_list comma if_item_not { 1687 $1->tail->next = $3; 1688 $1->tail = $3; 1689 $$ = $1; 1690 } 1691 ; 1692 1693if_item_not : not if_item { $$ = $2; $$->not = $1; } 1694 ; 1695 1696if_item : STRING { 1697 struct node_host *n; 1698 1699 if ((n = ifa_exists($1)) == NULL) { 1700 yyerror("unknown interface %s", $1); 1701 YYERROR; 1702 } 1703 $$ = calloc(1, sizeof(struct node_if)); 1704 if ($$ == NULL) 1705 err(1, "if_item: calloc"); 1706 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >= 1707 sizeof($$->ifname)) { 1708 free($$); 1709 yyerror("interface name too long"); 1710 YYERROR; 1711 } 1712 $$->ifa_flags = n->ifa_flags; 1713 $$->not = 0; 1714 $$->next = NULL; 1715 $$->tail = $$; 1716 } 1717 ; 1718 1719af : /* empty */ { $$ = 0; } 1720 | INET { $$ = AF_INET; } 1721 | INET6 { $$ = AF_INET6; } 1722 1723proto : /* empty */ { $$ = NULL; } 1724 | PROTO proto_item { $$ = $2; } 1725 | PROTO '{' proto_list '}' { $$ = $3; } 1726 ; 1727 1728proto_list : proto_item { $$ = $1; } 1729 | proto_list comma proto_item { 1730 $1->tail->next = $3; 1731 $1->tail = $3; 1732 $$ = $1; 1733 } 1734 ; 1735 1736proto_item : STRING { 1737 u_int8_t pr; 1738 u_long ulval; 1739 1740 if (atoul($1, &ulval) == 0) { 1741 if (ulval > 255) { 1742 yyerror("protocol outside range"); 1743 YYERROR; 1744 } 1745 pr = (u_int8_t)ulval; 1746 } else { 1747 struct protoent *p; 1748 1749 p = getprotobyname($1); 1750 if (p == NULL) { 1751 yyerror("unknown protocol %s", $1); 1752 YYERROR; 1753 } 1754 pr = p->p_proto; 1755 } 1756 if (pr == 0) { 1757 yyerror("proto 0 cannot be used"); 1758 YYERROR; 1759 } 1760 $$ = calloc(1, sizeof(struct node_proto)); 1761 if ($$ == NULL) 1762 err(1, "proto_item: calloc"); 1763 $$->proto = pr; 1764 $$->next = NULL; 1765 $$->tail = $$; 1766 } 1767 ; 1768 1769fromto : ALL { 1770 $$.src.host = NULL; 1771 $$.src.port = NULL; 1772 $$.dst.host = NULL; 1773 $$.dst.port = NULL; 1774 $$.src_os = NULL; 1775 } 1776 | from os to { 1777 $$.src = $1; 1778 $$.src_os = $2; 1779 $$.dst = $3; 1780 } 1781 ; 1782 1783os : /* empty */ { $$ = NULL; } 1784 | OS xos { $$ = $2; } 1785 | OS '{' os_list '}' { $$ = $3; } 1786 ; 1787 1788xos : STRING { 1789 $$ = calloc(1, sizeof(struct node_os)); 1790 if ($$ == NULL) 1791 err(1, "os: calloc"); 1792 $$->os = $1; 1793 $$->tail = $$; 1794 } 1795 ; 1796 1797os_list : xos { $$ = $1; } 1798 | os_list comma xos { 1799 $1->tail->next = $3; 1800 $1->tail = $3; 1801 $$ = $1; 1802 } 1803 ; 1804 1805from : /* empty */ { 1806 $$.host = NULL; 1807 $$.port = NULL; 1808 } 1809 | FROM ipportspec { 1810 $$ = $2; 1811 } 1812 ; 1813 1814to : /* empty */ { 1815 $$.host = NULL; 1816 $$.port = NULL; 1817 } 1818 | TO ipportspec { 1819 $$ = $2; 1820 } 1821 ; 1822 1823ipportspec : ipspec { 1824 $$.host = $1; 1825 $$.port = NULL; 1826 } 1827 | ipspec PORT portspec { 1828 $$.host = $1; 1829 $$.port = $3; 1830 } 1831 | PORT portspec { 1832 $$.host = NULL; 1833 $$.port = $2; 1834 } 1835 ; 1836 1837ipspec : ANY { $$ = NULL; } 1838 | xhost { $$ = $1; } 1839 | '{' host_list '}' { $$ = $2; } 1840 ; 1841 1842host_list : xhost { $$ = $1; } 1843 | host_list comma xhost { 1844 if ($3 == NULL) 1845 $$ = $1; 1846 else if ($1 == NULL) 1847 $$ = $3; 1848 else { 1849 $1->tail->next = $3; 1850 $1->tail = $3->tail; 1851 $$ = $1; 1852 } 1853 } 1854 ; 1855 1856xhost : not host { 1857 struct node_host *n; 1858 1859 for (n = $2; n != NULL; n = n->next) 1860 n->not = $1; 1861 $$ = $2; 1862 } 1863 | NOROUTE { 1864 $$ = calloc(1, sizeof(struct node_host)); 1865 if ($$ == NULL) 1866 err(1, "xhost: calloc"); 1867 $$->addr.type = PF_ADDR_NOROUTE; 1868 $$->next = NULL; 1869 $$->tail = $$; 1870 } 1871 ; 1872 1873host : STRING { 1874 if (($$ = host($1)) == NULL) { 1875 /* error. "any" is handled elsewhere */ 1876 yyerror("could not parse host specification"); 1877 YYERROR; 1878 } 1879 1880 } 1881 | STRING '/' number { 1882 char *buf; 1883 1884 if (asprintf(&buf, "%s/%u", $1, $3) == -1) 1885 err(1, "host: asprintf"); 1886 if (($$ = host(buf)) == NULL) { 1887 /* error. "any" is handled elsewhere */ 1888 free(buf); 1889 yyerror("could not parse host specification"); 1890 YYERROR; 1891 } 1892 free(buf); 1893 } 1894 | dynaddr 1895 | dynaddr '/' number { 1896 struct node_host *n; 1897 1898 $$ = $1; 1899 for (n = $1; n != NULL; n = n->next) 1900 set_ipmask(n, $3); 1901 } 1902 | '<' STRING '>' { 1903 if (strlen($2) >= PF_TABLE_NAME_SIZE) { 1904 yyerror("table name '%s' too long"); 1905 YYERROR; 1906 } 1907 $$ = calloc(1, sizeof(struct node_host)); 1908 if ($$ == NULL) 1909 err(1, "host: calloc"); 1910 $$->addr.type = PF_ADDR_TABLE; 1911 if (strlcpy($$->addr.v.tblname, $2, 1912 sizeof($$->addr.v.tblname)) >= 1913 sizeof($$->addr.v.tblname)) 1914 errx(1, "host: strlcpy"); 1915 $$->next = NULL; 1916 $$->tail = $$; 1917 } 1918 ; 1919 1920number : STRING { 1921 u_long ulval; 1922 1923 if (atoul($1, &ulval) == -1) { 1924 yyerror("%s is not a number", $1); 1925 YYERROR; 1926 } else 1927 $$ = ulval; 1928 } 1929 ; 1930 1931dynaddr : '(' STRING ')' { 1932 if (ifa_exists($2) == NULL) { 1933 yyerror("interface %s does not exist", $2); 1934 YYERROR; 1935 } 1936 $$ = calloc(1, sizeof(struct node_host)); 1937 if ($$ == NULL) 1938 err(1, "address: calloc"); 1939 $$->af = 0; 1940 set_ipmask($$, 128); 1941 $$->addr.type = PF_ADDR_DYNIFTL; 1942 if (strlcpy($$->addr.v.ifname, $2, 1943 sizeof($$->addr.v.ifname)) >= 1944 sizeof($$->addr.v.ifname)) { 1945 free($$); 1946 yyerror("interface name too long"); 1947 YYERROR; 1948 } 1949 $$->next = NULL; 1950 $$->tail = $$; 1951 } 1952 ; 1953 1954portspec : port_item { $$ = $1; } 1955 | '{' port_list '}' { $$ = $2; } 1956 ; 1957 1958port_list : port_item { $$ = $1; } 1959 | port_list comma port_item { 1960 $1->tail->next = $3; 1961 $1->tail = $3; 1962 $$ = $1; 1963 } 1964 ; 1965 1966port_item : port { 1967 $$ = calloc(1, sizeof(struct node_port)); 1968 if ($$ == NULL) 1969 err(1, "port_item: calloc"); 1970 $$->port[0] = $1.a; 1971 $$->port[1] = $1.b; 1972 if ($1.t) 1973 $$->op = PF_OP_RRG; 1974 else 1975 $$->op = PF_OP_EQ; 1976 $$->next = NULL; 1977 $$->tail = $$; 1978 } 1979 | unaryop port { 1980 if ($2.t) { 1981 yyerror("':' cannot be used with an other " 1982 "port operator"); 1983 YYERROR; 1984 } 1985 $$ = calloc(1, sizeof(struct node_port)); 1986 if ($$ == NULL) 1987 err(1, "port_item: calloc"); 1988 $$->port[0] = $2.a; 1989 $$->port[1] = $2.b; 1990 $$->op = $1; 1991 $$->next = NULL; 1992 $$->tail = $$; 1993 } 1994 | port PORTBINARY port { 1995 if ($1.t || $3.t) { 1996 yyerror("':' cannot be used with an other " 1997 "port operator"); 1998 YYERROR; 1999 } 2000 $$ = calloc(1, sizeof(struct node_port)); 2001 if ($$ == NULL) 2002 err(1, "port_item: calloc"); 2003 $$->port[0] = $1.a; 2004 $$->port[1] = $3.a; 2005 $$->op = $2; 2006 $$->next = NULL; 2007 $$->tail = $$; 2008 } 2009 ; 2010 2011port : STRING { 2012 char *p = strchr($1, ':'); 2013 struct servent *s = NULL; 2014 u_long ulval; 2015 2016 if (p == NULL) { 2017 if (atoul($1, &ulval) == 0) { 2018 if (ulval > 65535) { 2019 yyerror("illegal port value %d", 2020 ulval); 2021 YYERROR; 2022 } 2023 $$.a = htons(ulval); 2024 } else { 2025 s = getservbyname($1, "tcp"); 2026 if (s == NULL) 2027 s = getservbyname($1, "udp"); 2028 if (s == NULL) { 2029 yyerror("unknown port %s", $1); 2030 YYERROR; 2031 } 2032 $$.a = s->s_port; 2033 } 2034 $$.b = 0; 2035 $$.t = 0; 2036 } else { 2037 int port[2]; 2038 2039 *p++ = 0; 2040 if ((port[0] = getservice($1)) == -1 || 2041 (port[1] = getservice(p)) == -1) 2042 YYERROR; 2043 $$.a = port[0]; 2044 $$.b = port[1]; 2045 $$.t = PF_OP_RRG; 2046 } 2047 } 2048 ; 2049 2050uids : uid_item { $$ = $1; } 2051 | '{' uid_list '}' { $$ = $2; } 2052 ; 2053 2054uid_list : uid_item { $$ = $1; } 2055 | uid_list comma uid_item { 2056 $1->tail->next = $3; 2057 $1->tail = $3; 2058 $$ = $1; 2059 } 2060 ; 2061 2062uid_item : uid { 2063 $$ = calloc(1, sizeof(struct node_uid)); 2064 if ($$ == NULL) 2065 err(1, "uid_item: calloc"); 2066 $$->uid[0] = $1; 2067 $$->uid[1] = $1; 2068 $$->op = PF_OP_EQ; 2069 $$->next = NULL; 2070 $$->tail = $$; 2071 } 2072 | unaryop uid { 2073 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 2074 yyerror("user unknown requires operator = or " 2075 "!="); 2076 YYERROR; 2077 } 2078 $$ = calloc(1, sizeof(struct node_uid)); 2079 if ($$ == NULL) 2080 err(1, "uid_item: calloc"); 2081 $$->uid[0] = $2; 2082 $$->uid[1] = $2; 2083 $$->op = $1; 2084 $$->next = NULL; 2085 $$->tail = $$; 2086 } 2087 | uid PORTBINARY uid { 2088 if ($1 == UID_MAX || $3 == UID_MAX) { 2089 yyerror("user unknown requires operator = or " 2090 "!="); 2091 YYERROR; 2092 } 2093 $$ = calloc(1, sizeof(struct node_uid)); 2094 if ($$ == NULL) 2095 err(1, "uid_item: calloc"); 2096 $$->uid[0] = $1; 2097 $$->uid[1] = $3; 2098 $$->op = $2; 2099 $$->next = NULL; 2100 $$->tail = $$; 2101 } 2102 ; 2103 2104uid : STRING { 2105 u_long ulval; 2106 2107 if (atoul($1, &ulval) == -1) { 2108 if (!strcmp($1, "unknown")) 2109 $$ = UID_MAX; 2110 else { 2111 struct passwd *pw; 2112 2113 if ((pw = getpwnam($1)) == NULL) { 2114 yyerror("unknown user %s", $1); 2115 YYERROR; 2116 } 2117 $$ = pw->pw_uid; 2118 } 2119 } else { 2120 if (ulval >= UID_MAX) { 2121 yyerror("illegal uid value %lu", ulval); 2122 YYERROR; 2123 } 2124 $$ = ulval; 2125 } 2126 } 2127 ; 2128 2129gids : gid_item { $$ = $1; } 2130 | '{' gid_list '}' { $$ = $2; } 2131 ; 2132 2133gid_list : gid_item { $$ = $1; } 2134 | gid_list comma gid_item { 2135 $1->tail->next = $3; 2136 $1->tail = $3; 2137 $$ = $1; 2138 } 2139 ; 2140 2141gid_item : gid { 2142 $$ = calloc(1, sizeof(struct node_gid)); 2143 if ($$ == NULL) 2144 err(1, "gid_item: calloc"); 2145 $$->gid[0] = $1; 2146 $$->gid[1] = $1; 2147 $$->op = PF_OP_EQ; 2148 $$->next = NULL; 2149 $$->tail = $$; 2150 } 2151 | unaryop gid { 2152 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) { 2153 yyerror("group unknown requires operator = or " 2154 "!="); 2155 YYERROR; 2156 } 2157 $$ = calloc(1, sizeof(struct node_gid)); 2158 if ($$ == NULL) 2159 err(1, "gid_item: calloc"); 2160 $$->gid[0] = $2; 2161 $$->gid[1] = $2; 2162 $$->op = $1; 2163 $$->next = NULL; 2164 $$->tail = $$; 2165 } 2166 | gid PORTBINARY gid { 2167 if ($1 == GID_MAX || $3 == GID_MAX) { 2168 yyerror("group unknown requires operator = or " 2169 "!="); 2170 YYERROR; 2171 } 2172 $$ = calloc(1, sizeof(struct node_gid)); 2173 if ($$ == NULL) 2174 err(1, "gid_item: calloc"); 2175 $$->gid[0] = $1; 2176 $$->gid[1] = $3; 2177 $$->op = $2; 2178 $$->next = NULL; 2179 $$->tail = $$; 2180 } 2181 ; 2182 2183gid : STRING { 2184 u_long ulval; 2185 2186 if (atoul($1, &ulval) == -1) { 2187 if (!strcmp($1, "unknown")) 2188 $$ = GID_MAX; 2189 else { 2190 struct group *grp; 2191 2192 if ((grp = getgrnam($1)) == NULL) { 2193 yyerror("unknown group %s", $1); 2194 YYERROR; 2195 } 2196 $$ = grp->gr_gid; 2197 } 2198 } else { 2199 if (ulval >= GID_MAX) { 2200 yyerror("illegal gid value %lu", ulval); 2201 YYERROR; 2202 } 2203 $$ = ulval; 2204 } 2205 } 2206 ; 2207 2208flag : STRING { 2209 int f; 2210 2211 if ((f = parse_flags($1)) < 0) { 2212 yyerror("bad flags %s", $1); 2213 YYERROR; 2214 } 2215 $$.b1 = f; 2216 } 2217 ; 2218 2219flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; } 2220 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; } 2221 ; 2222 2223icmpspec : ICMPTYPE icmp_item { $$ = $2; } 2224 | ICMPTYPE '{' icmp_list '}' { $$ = $3; } 2225 | ICMP6TYPE icmp6_item { $$ = $2; } 2226 | ICMP6TYPE '{' icmp6_list '}' { $$ = $3; } 2227 ; 2228 2229icmp_list : icmp_item { $$ = $1; } 2230 | icmp_list comma icmp_item { 2231 $1->tail->next = $3; 2232 $1->tail = $3; 2233 $$ = $1; 2234 } 2235 ; 2236 2237icmp6_list : icmp6_item { $$ = $1; } 2238 | icmp6_list comma icmp6_item { 2239 $1->tail->next = $3; 2240 $1->tail = $3; 2241 $$ = $1; 2242 } 2243 ; 2244 2245icmp_item : icmptype { 2246 $$ = calloc(1, sizeof(struct node_icmp)); 2247 if ($$ == NULL) 2248 err(1, "icmp_item: calloc"); 2249 $$->type = $1; 2250 $$->code = 0; 2251 $$->proto = IPPROTO_ICMP; 2252 $$->next = NULL; 2253 $$->tail = $$; 2254 } 2255 | icmptype CODE STRING { 2256 const struct icmpcodeent *p; 2257 u_long ulval; 2258 2259 if (atoul($3, &ulval) == 0) { 2260 if (ulval > 255) { 2261 yyerror("illegal icmp-code %d", ulval); 2262 YYERROR; 2263 } 2264 } else { 2265 if ((p = geticmpcodebyname($1-1, $3, 2266 AF_INET)) == NULL) { 2267 yyerror("unknown icmp-code %s", $3); 2268 YYERROR; 2269 } 2270 ulval = p->code; 2271 } 2272 $$ = calloc(1, sizeof(struct node_icmp)); 2273 if ($$ == NULL) 2274 err(1, "icmp_item: calloc"); 2275 $$->type = $1; 2276 $$->code = ulval + 1; 2277 $$->proto = IPPROTO_ICMP; 2278 $$->next = NULL; 2279 $$->tail = $$; 2280 } 2281 ; 2282 2283icmp6_item : icmp6type { 2284 $$ = calloc(1, sizeof(struct node_icmp)); 2285 if ($$ == NULL) 2286 err(1, "icmp_item: calloc"); 2287 $$->type = $1; 2288 $$->code = 0; 2289 $$->proto = IPPROTO_ICMPV6; 2290 $$->next = NULL; 2291 $$->tail = $$; 2292 } 2293 | icmp6type CODE STRING { 2294 const struct icmpcodeent *p; 2295 u_long ulval; 2296 2297 if (atoul($3, &ulval) == 0) { 2298 if (ulval > 255) { 2299 yyerror("illegal icmp6-code %ld", 2300 ulval); 2301 YYERROR; 2302 } 2303 } else { 2304 if ((p = geticmpcodebyname($1-1, $3, 2305 AF_INET6)) == NULL) { 2306 yyerror("unknown icmp6-code %s", $3); 2307 YYERROR; 2308 } 2309 ulval = p->code; 2310 } 2311 $$ = calloc(1, sizeof(struct node_icmp)); 2312 if ($$ == NULL) 2313 err(1, "icmp_item: calloc"); 2314 $$->type = $1; 2315 $$->code = ulval + 1; 2316 $$->proto = IPPROTO_ICMPV6; 2317 $$->next = NULL; 2318 $$->tail = $$; 2319 } 2320 ; 2321 2322icmptype : STRING { 2323 const struct icmptypeent *p; 2324 u_long ulval; 2325 2326 if (atoul($1, &ulval) == 0) { 2327 if (ulval > 255) { 2328 yyerror("illegal icmp-type %d", ulval); 2329 YYERROR; 2330 } 2331 $$ = ulval + 1; 2332 } else { 2333 if ((p = geticmptypebyname($1, AF_INET)) == 2334 NULL) { 2335 yyerror("unknown icmp-type %s", $1); 2336 YYERROR; 2337 } 2338 $$ = p->type + 1; 2339 } 2340 } 2341 ; 2342 2343icmp6type : STRING { 2344 const struct icmptypeent *p; 2345 u_long ulval; 2346 2347 if (atoul($1, &ulval) == 0) { 2348 if (ulval > 255) { 2349 yyerror("illegal icmp6-type %d", ulval); 2350 YYERROR; 2351 } 2352 $$ = ulval + 1; 2353 } else { 2354 if ((p = geticmptypebyname($1, AF_INET6)) == 2355 NULL) { 2356 yyerror("unknown icmp6-type %s", $1); 2357 YYERROR; 2358 } 2359 $$ = p->type + 1; 2360 } 2361 } 2362 ; 2363 2364tos : TOS STRING { 2365 if (!strcmp($2, "lowdelay")) 2366 $$ = IPTOS_LOWDELAY; 2367 else if (!strcmp($2, "throughput")) 2368 $$ = IPTOS_THROUGHPUT; 2369 else if (!strcmp($2, "reliability")) 2370 $$ = IPTOS_RELIABILITY; 2371 else if ($2[0] == '0' && $2[1] == 'x') 2372 $$ = strtoul($2, NULL, 16); 2373 else 2374 $$ = strtoul($2, NULL, 10); 2375 if (!$$ || $$ > 255) { 2376 yyerror("illegal tos value %s", $2); 2377 YYERROR; 2378 } 2379 } 2380 ; 2381 2382keep : KEEP STATE state_opt_spec { 2383 $$.action = PF_STATE_NORMAL; 2384 $$.options = $3; 2385 } 2386 | MODULATE STATE state_opt_spec { 2387 $$.action = PF_STATE_MODULATE; 2388 $$.options = $3; 2389 } 2390 | SYNPROXY STATE state_opt_spec { 2391 $$.action = PF_STATE_SYNPROXY; 2392 $$.options = $3; 2393 } 2394 ; 2395 2396state_opt_spec : '(' state_opt_list ')' { $$ = $2; } 2397 | /* empty */ { $$ = NULL; } 2398 ; 2399 2400state_opt_list : state_opt_item { $$ = $1; } 2401 | state_opt_list comma state_opt_item { 2402 $1->tail->next = $3; 2403 $1->tail = $3; 2404 $$ = $1; 2405 } 2406 ; 2407 2408state_opt_item : MAXIMUM number { 2409 $$ = calloc(1, sizeof(struct node_state_opt)); 2410 if ($$ == NULL) 2411 err(1, "state_opt_item: calloc"); 2412 $$->type = PF_STATE_OPT_MAX; 2413 $$->data.max_states = $2; 2414 $$->next = NULL; 2415 $$->tail = $$; 2416 } 2417 | NOSYNC { 2418 $$ = calloc(1, sizeof(struct node_state_opt)); 2419 if ($$ == NULL) 2420 err(1, "state_opt_item: calloc"); 2421 $$->type = PF_STATE_OPT_NOSYNC; 2422 $$->next = NULL; 2423 $$->tail = $$; 2424 } 2425 | STRING number { 2426 int i; 2427 2428 for (i = 0; pf_timeouts[i].name && 2429 strcmp(pf_timeouts[i].name, $1); ++i) 2430 ; /* nothing */ 2431 if (!pf_timeouts[i].name) { 2432 yyerror("illegal timeout name %s", $1); 2433 YYERROR; 2434 } 2435 if (strchr(pf_timeouts[i].name, '.') == NULL) { 2436 yyerror("illegal state timeout %s", $1); 2437 YYERROR; 2438 } 2439 $$ = calloc(1, sizeof(struct node_state_opt)); 2440 if ($$ == NULL) 2441 err(1, "state_opt_item: calloc"); 2442 $$->type = PF_STATE_OPT_TIMEOUT; 2443 $$->data.timeout.number = pf_timeouts[i].timeout; 2444 $$->data.timeout.seconds = $2; 2445 $$->next = NULL; 2446 $$->tail = $$; 2447 } 2448 ; 2449 2450label : LABEL STRING { 2451 if (($$ = strdup($2)) == NULL) 2452 err(1, "rule label strdup() failed"); 2453 } 2454 ; 2455 2456qname : QUEUE STRING { 2457 if (($$.qname = strdup($2)) == NULL) 2458 err(1, "qname strdup() failed"); 2459 } 2460 | QUEUE '(' STRING ')' { 2461 if (($$.qname = strdup($3)) == NULL) 2462 err(1, "qname strdup() failed"); 2463 } 2464 | QUEUE '(' STRING comma STRING ')' { 2465 if (($$.qname = strdup($3)) == NULL || 2466 ($$.pqname = strdup($5)) == NULL) 2467 err(1, "qname strdup() failed"); 2468 } 2469 ; 2470 2471no : /* empty */ { $$ = 0; } 2472 | NO { $$ = 1; } 2473 ; 2474 2475rport : STRING { 2476 char *p = strchr($1, ':'); 2477 2478 if (p == NULL) { 2479 if (($$.a = getservice($1)) == -1) 2480 YYERROR; 2481 $$.b = $$.t = 0; 2482 } else if (!strcmp(p+1, "*")) { 2483 *p = 0; 2484 if (($$.a = getservice($1)) == -1) 2485 YYERROR; 2486 $$.b = 0; 2487 $$.t = 1; 2488 } else { 2489 *p++ = 0; 2490 if (($$.a = getservice($1)) == -1 || 2491 ($$.b = getservice(p)) == -1) 2492 YYERROR; 2493 if ($$.a == $$.b) 2494 $$.b = 0; 2495 $$.t = 0; 2496 } 2497 } 2498 ; 2499 2500redirspec : host { $$ = $1; } 2501 | '{' redir_host_list '}' { $$ = $2; } 2502 ; 2503 2504redir_host_list : host { $$ = $1; } 2505 | redir_host_list comma host { 2506 $1->tail->next = $3; 2507 $1->tail = $3->tail; 2508 $$ = $1; 2509 } 2510 ; 2511 2512redirpool : /* empty */ { $$ = NULL; } 2513 | ARROW redirspec { 2514 $$ = calloc(1, sizeof(struct redirection)); 2515 if ($$ == NULL) 2516 err(1, "redirection: calloc"); 2517 $$->host = $2; 2518 $$->rport.a = $$->rport.b = $$->rport.t = 0; 2519 } 2520 | ARROW redirspec PORT rport { 2521 $$ = calloc(1, sizeof(struct redirection)); 2522 if ($$ == NULL) 2523 err(1, "redirection: calloc"); 2524 $$->host = $2; 2525 $$->rport = $4; 2526 } 2527 ; 2528 2529hashkey : /* empty */ 2530 { 2531 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 2532 if ($$ == NULL) 2533 err(1, "hashkey: calloc"); 2534 $$->key32[0] = arc4random(); 2535 $$->key32[1] = arc4random(); 2536 $$->key32[2] = arc4random(); 2537 $$->key32[3] = arc4random(); 2538 } 2539 | string 2540 { 2541 if (!strncmp($1, "0x", 2)) { 2542 if (strlen($1) != 34) { 2543 yyerror("hex key must be 128 bits " 2544 "(32 hex digits) long"); 2545 YYERROR; 2546 } 2547 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 2548 if ($$ == NULL) 2549 err(1, "hashkey: calloc"); 2550 2551 if (sscanf($1, "0x%8x%8x%8x%8x", 2552 &$$->key32[0], &$$->key32[1], 2553 &$$->key32[2], &$$->key32[3]) != 4) { 2554 free($$); 2555 yyerror("invalid hex key"); 2556 YYERROR; 2557 } 2558 } else { 2559 MD5_CTX context; 2560 2561 $$ = calloc(1, sizeof(struct pf_poolhashkey)); 2562 if ($$ == NULL) 2563 err(1, "hashkey: calloc"); 2564 MD5Init(&context); 2565 MD5Update(&context, (unsigned char *)$1, 2566 strlen($1)); 2567 MD5Final((unsigned char *)$$, &context); 2568 HTONL($$->key32[0]); 2569 HTONL($$->key32[1]); 2570 HTONL($$->key32[2]); 2571 HTONL($$->key32[3]); 2572 } 2573 } 2574 ; 2575 2576pooltype : /* empty */ 2577 { 2578 $$.type = PF_POOL_NONE; 2579 $$.key = NULL; 2580 } 2581 | BITMASK 2582 { 2583 $$.type = PF_POOL_BITMASK; 2584 $$.key = NULL; 2585 } 2586 | RANDOM 2587 { 2588 $$.type = PF_POOL_RANDOM; 2589 $$.key = NULL; 2590 } 2591 | SOURCEHASH hashkey 2592 { 2593 $$.type = PF_POOL_SRCHASH; 2594 $$.key = $2; 2595 } 2596 | ROUNDROBIN 2597 { 2598 $$.type = PF_POOL_ROUNDROBIN; 2599 $$.key = NULL; 2600 } 2601 ; 2602 2603staticport : /* empty */ { $$ = 0; } 2604 | STATICPORT { $$ = 1; } 2605 ; 2606 2607redirection : /* empty */ { $$ = NULL; } 2608 | ARROW host { 2609 $$ = calloc(1, sizeof(struct redirection)); 2610 if ($$ == NULL) 2611 err(1, "redirection: calloc"); 2612 $$->host = $2; 2613 $$->rport.a = $$->rport.b = $$->rport.t = 0; 2614 } 2615 | ARROW host PORT rport { 2616 $$ = calloc(1, sizeof(struct redirection)); 2617 if ($$ == NULL) 2618 err(1, "redirection: calloc"); 2619 $$->host = $2; 2620 $$->rport = $4; 2621 } 2622 ; 2623 2624natpass : /* empty */ { $$ = 0; } 2625 | PASS { $$ = 1; } 2626 ; 2627 2628nataction : no NAT natpass { 2629 $$.b2 = $$.w = 0; 2630 if ($1) 2631 $$.b1 = PF_NONAT; 2632 else 2633 $$.b1 = PF_NAT; 2634 $$.b2 = $3; 2635 } 2636 | no RDR natpass { 2637 $$.b2 = $$.w = 0; 2638 if ($1) 2639 $$.b1 = PF_NORDR; 2640 else 2641 $$.b1 = PF_RDR; 2642 $$.b2 = $3; 2643 } 2644 ; 2645 2646natrule : nataction interface af proto fromto tag redirpool pooltype 2647 staticport 2648 { 2649 struct pf_rule r; 2650 2651 if (check_rulestate(PFCTL_STATE_NAT)) 2652 YYERROR; 2653 2654 memset(&r, 0, sizeof(r)); 2655 2656 r.action = $1.b1; 2657 r.natpass = $1.b2; 2658 r.af = $3; 2659 2660 if (!r.af) { 2661 if ($5.src.host && $5.src.host->af && 2662 !$5.src.host->ifindex) 2663 r.af = $5.src.host->af; 2664 else if ($5.dst.host && $5.dst.host->af && 2665 !$5.dst.host->ifindex) 2666 r.af = $5.dst.host->af; 2667 } 2668 2669 if ($6 != NULL) 2670 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) > 2671 PF_TAG_NAME_SIZE) { 2672 yyerror("tag too long, max %u chars", 2673 PF_TAG_NAME_SIZE - 1); 2674 YYERROR; 2675 } 2676 2677 if (r.action == PF_NONAT || r.action == PF_NORDR) { 2678 if ($7 != NULL) { 2679 yyerror("translation rule with 'no' " 2680 "does not need '->'"); 2681 YYERROR; 2682 } 2683 } else { 2684 if ($7 == NULL || $7->host == NULL) { 2685 yyerror("translation rule requires '-> " 2686 "address'"); 2687 YYERROR; 2688 } 2689 if (!r.af && ! $7->host->ifindex) 2690 r.af = $7->host->af; 2691 2692 remove_invalid_hosts(&$7->host, &r.af); 2693 if (invalid_redirect($7->host, r.af)) 2694 YYERROR; 2695 if (check_netmask($7->host, r.af)) 2696 YYERROR; 2697 2698 r.rpool.proxy_port[0] = ntohs($7->rport.a); 2699 2700 switch (r.action) { 2701 case PF_RDR: 2702 if (!$7->rport.b && $7->rport.t && 2703 $5.dst.port != NULL) { 2704 r.rpool.proxy_port[1] = 2705 ntohs($7->rport.a) + 2706 (ntohs($5.dst.port->port[1]) - 2707 ntohs($5.dst.port->port[0])); 2708 } else 2709 r.rpool.proxy_port[1] = 2710 ntohs($7->rport.b); 2711 break; 2712 case PF_NAT: 2713 r.rpool.proxy_port[1] = ntohs($7->rport.b); 2714 if (!r.rpool.proxy_port[0] && 2715 !r.rpool.proxy_port[1]) { 2716 r.rpool.proxy_port[0] = 2717 PF_NAT_PROXY_PORT_LOW; 2718 r.rpool.proxy_port[1] = 2719 PF_NAT_PROXY_PORT_HIGH; 2720 } else if (!r.rpool.proxy_port[1]) 2721 r.rpool.proxy_port[1] = 2722 r.rpool.proxy_port[0]; 2723 break; 2724 default: 2725 break; 2726 } 2727 2728 r.rpool.opts = $8.type; 2729 if (r.rpool.opts == PF_POOL_NONE) 2730 r.rpool.opts = PF_POOL_ROUNDROBIN; 2731 if (r.rpool.opts != PF_POOL_ROUNDROBIN) 2732 if (disallow_table($7->host, "tables " 2733 "are only supported in round-robin " 2734 "redirection pools")) 2735 YYERROR; 2736 if ($7->host->next) { 2737 if (r.rpool.opts != 2738 PF_POOL_ROUNDROBIN) { 2739 yyerror("only round-robin " 2740 "valid for multiple " 2741 "redirection addresses"); 2742 YYERROR; 2743 } 2744 } else { 2745 if ((r.af == AF_INET && 2746 unmask(&$7->host->addr.v.a.mask, 2747 r.af) == 32) || 2748 (r.af == AF_INET6 && 2749 unmask(&$7->host->addr.v.a.mask, 2750 r.af) == 128)) { 2751 r.rpool.opts = PF_POOL_NONE; 2752 } 2753 } 2754 } 2755 2756 if ($8.key != NULL) 2757 memcpy(&r.rpool.key, $8.key, 2758 sizeof(struct pf_poolhashkey)); 2759 2760 if ($9 != 0) { 2761 if (r.action != PF_NAT) { 2762 yyerror("the 'static-port' option is " 2763 "only valid with nat rules"); 2764 YYERROR; 2765 } 2766 if (r.rpool.proxy_port[0] != 2767 PF_NAT_PROXY_PORT_LOW && 2768 r.rpool.proxy_port[1] != 2769 PF_NAT_PROXY_PORT_HIGH) { 2770 yyerror("the 'static-port' option can't" 2771 " be used when specifying a port" 2772 " range"); 2773 YYERROR; 2774 } 2775 r.rpool.proxy_port[0] = 0; 2776 r.rpool.proxy_port[1] = 0; 2777 } 2778 2779 expand_rule(&r, $2, $7 == NULL ? NULL : $7->host, $4, 2780 $5.src_os, $5.src.host, $5.src.port, $5.dst.host, 2781 $5.dst.port, 0, 0, 0); 2782 free($7); 2783 } 2784 ; 2785 2786binatrule : no BINAT natpass interface af proto FROM host TO ipspec tag 2787 redirection 2788 { 2789 struct pf_rule binat; 2790 struct pf_pooladdr *pa; 2791 2792 if (check_rulestate(PFCTL_STATE_NAT)) 2793 YYERROR; 2794 2795 memset(&binat, 0, sizeof(binat)); 2796 2797 if ($1) 2798 binat.action = PF_NOBINAT; 2799 else 2800 binat.action = PF_BINAT; 2801 binat.natpass = $3; 2802 binat.af = $5; 2803 if (!binat.af && $8 != NULL && $8->af) 2804 binat.af = $8->af; 2805 if (!binat.af && $10 != NULL && $10->af) 2806 binat.af = $10->af; 2807 if (!binat.af && $12 != NULL && $12->host) 2808 binat.af = $12->host->af; 2809 if (!binat.af) { 2810 yyerror("address family (inet/inet6) " 2811 "undefined"); 2812 YYERROR; 2813 } 2814 2815 if ($4 != NULL) { 2816 memcpy(binat.ifname, $4->ifname, 2817 sizeof(binat.ifname)); 2818 free($4); 2819 } 2820 if ($11 != NULL) 2821 if (strlcpy(binat.tagname, $11, 2822 PF_TAG_NAME_SIZE) > PF_TAG_NAME_SIZE) { 2823 yyerror("tag too long, max %u chars", 2824 PF_TAG_NAME_SIZE - 1); 2825 YYERROR; 2826 } 2827 2828 if ($6 != NULL) { 2829 binat.proto = $6->proto; 2830 free($6); 2831 } 2832 2833 if ($8 != NULL && disallow_table($8, "invalid use of " 2834 "table <%s> as the source address of a binat rule")) 2835 YYERROR; 2836 if ($12 != NULL && $12->host != NULL && disallow_table( 2837 $12->host, "invalid use of table <%s> as the " 2838 "redirect address of a binat rule")) 2839 YYERROR; 2840 2841 if ($8 != NULL) { 2842 if ($8->next) { 2843 yyerror("multiple binat ip addresses"); 2844 YYERROR; 2845 } 2846 if ($8->addr.type == PF_ADDR_DYNIFTL) 2847 $8->af = binat.af; 2848 if ($8->af != binat.af) { 2849 yyerror("binat ip versions must match"); 2850 YYERROR; 2851 } 2852 if (check_netmask($8, binat.af)) 2853 YYERROR; 2854 memcpy(&binat.src.addr, &$8->addr, 2855 sizeof(binat.src.addr)); 2856 free($8); 2857 } 2858 if ($10 != NULL) { 2859 if ($10->next) { 2860 yyerror("multiple binat ip addresses"); 2861 YYERROR; 2862 } 2863 if ($10->af != binat.af && $10->af) { 2864 yyerror("binat ip versions must match"); 2865 YYERROR; 2866 } 2867 if (check_netmask($10, binat.af)) 2868 YYERROR; 2869 memcpy(&binat.dst.addr, &$10->addr, 2870 sizeof(binat.dst.addr)); 2871 binat.dst.not = $10->not; 2872 free($10); 2873 } 2874 2875 if (binat.action == PF_NOBINAT) { 2876 if ($12 != NULL) { 2877 yyerror("'no binat' rule does not need" 2878 " '->'"); 2879 YYERROR; 2880 } 2881 } else { 2882 if ($12 == NULL || $12->host == NULL) { 2883 yyerror("'binat' rule requires" 2884 " '-> address'"); 2885 YYERROR; 2886 } 2887 2888 remove_invalid_hosts(&$12->host, &binat.af); 2889 if (invalid_redirect($12->host, binat.af)) 2890 YYERROR; 2891 if ($12->host->next != NULL) { 2892 yyerror("binat rule must redirect to " 2893 "a single address"); 2894 YYERROR; 2895 } 2896 if (check_netmask($12->host, binat.af)) 2897 YYERROR; 2898 2899 if (!PF_AZERO(&binat.src.addr.v.a.mask, 2900 binat.af) && 2901 !PF_AEQ(&binat.src.addr.v.a.mask, 2902 &$12->host->addr.v.a.mask, binat.af)) { 2903 yyerror("'binat' source mask and " 2904 "redirect mask must be the same"); 2905 YYERROR; 2906 } 2907 2908 TAILQ_INIT(&binat.rpool.list); 2909 pa = calloc(1, sizeof(struct pf_pooladdr)); 2910 if (pa == NULL) 2911 err(1, "binat: calloc"); 2912 pa->addr = $12->host->addr; 2913 pa->ifname[0] = 0; 2914 TAILQ_INSERT_TAIL(&binat.rpool.list, 2915 pa, entries); 2916 2917 free($12); 2918 } 2919 2920 pfctl_add_rule(pf, &binat); 2921 } 2922 ; 2923 2924tag : /* empty */ { $$ = NULL; } 2925 | TAG STRING { $$ = $2; } 2926 2927route_host : STRING { 2928 struct node_host *n; 2929 2930 $$ = calloc(1, sizeof(struct node_host)); 2931 if ($$ == NULL) 2932 err(1, "route_host: calloc"); 2933 if (($$->ifname = strdup($1)) == NULL) 2934 err(1, "routeto: strdup"); 2935 if ((n = ifa_exists($$->ifname)) == NULL) { 2936 yyerror("routeto: unknown interface %s", 2937 $$->ifname); 2938 YYERROR; 2939 } 2940 set_ipmask($$, 128); 2941 $$->next = NULL; 2942 $$->tail = $$; 2943 } 2944 | '(' STRING host ')' { 2945 struct node_host *n; 2946 2947 $$ = $3; 2948 if (($$->ifname = strdup($2)) == NULL) 2949 err(1, "routeto: strdup"); 2950 if ((n = ifa_exists($$->ifname)) == NULL) { 2951 yyerror("routeto: unknown interface %s", 2952 $$->ifname); 2953 YYERROR; 2954 } 2955 } 2956 ; 2957 2958route_host_list : route_host { $$ = $1; } 2959 | route_host_list comma route_host { 2960 if ($1->af == 0) 2961 $1->af = $3->af; 2962 if ($1->af != $3->af) { 2963 yyerror("all pool addresses must be in the " 2964 "same address family"); 2965 YYERROR; 2966 } 2967 $1->tail->next = $3; 2968 $1->tail = $3->tail; 2969 $$ = $1; 2970 } 2971 ; 2972 2973routespec : route_host { $$ = $1; } 2974 | '{' route_host_list '}' { $$ = $2; } 2975 ; 2976 2977route : /* empty */ { 2978 $$.host = NULL; 2979 $$.rt = 0; 2980 $$.pool_opts = 0; 2981 } 2982 | FASTROUTE { 2983 $$.host = NULL; 2984 $$.rt = PF_FASTROUTE; 2985 $$.pool_opts = 0; 2986 } 2987 | ROUTETO routespec pooltype { 2988 $$.host = $2; 2989 $$.rt = PF_ROUTETO; 2990 $$.pool_opts = $3.type; 2991 if ($3.key != NULL) 2992 $$.key = $3.key; 2993 } 2994 | REPLYTO routespec pooltype { 2995 $$.host = $2; 2996 $$.rt = PF_REPLYTO; 2997 $$.pool_opts = $3.type; 2998 if ($3.key != NULL) 2999 $$.key = $3.key; 3000 } 3001 | DUPTO routespec pooltype { 3002 $$.host = $2; 3003 $$.rt = PF_DUPTO; 3004 $$.pool_opts = $3.type; 3005 if ($3.key != NULL) 3006 $$.key = $3.key; 3007 } 3008 ; 3009 3010timeout_spec : STRING number 3011 { 3012 if (check_rulestate(PFCTL_STATE_OPTION)) 3013 YYERROR; 3014 if (pfctl_set_timeout(pf, $1, $2, 0) != 0) { 3015 yyerror("unknown timeout %s", $1); 3016 YYERROR; 3017 } 3018 } 3019 ; 3020 3021timeout_list : timeout_list comma timeout_spec 3022 | timeout_spec 3023 ; 3024 3025limit_spec : STRING number 3026 { 3027 if (check_rulestate(PFCTL_STATE_OPTION)) 3028 YYERROR; 3029 if (pfctl_set_limit(pf, $1, $2) != 0) { 3030 yyerror("unable to set limit %s %u", $1, $2); 3031 YYERROR; 3032 } 3033 } 3034 3035limit_list : limit_list comma limit_spec 3036 | limit_spec 3037 ; 3038 3039comma : ',' 3040 | /* empty */ 3041 ; 3042 3043yesno : NO { $$ = 0; } 3044 | STRING { 3045 if (!strcmp($1, "yes")) 3046 $$ = 1; 3047 else 3048 YYERROR; 3049 } 3050 3051unaryop : '=' { $$ = PF_OP_EQ; } 3052 | '!' '=' { $$ = PF_OP_NE; } 3053 | '<' '=' { $$ = PF_OP_LE; } 3054 | '<' { $$ = PF_OP_LT; } 3055 | '>' '=' { $$ = PF_OP_GE; } 3056 | '>' { $$ = PF_OP_GT; } 3057 ; 3058 3059%% 3060 3061int 3062yyerror(const char *fmt, ...) 3063{ 3064 va_list ap; 3065 extern char *infile; 3066 3067 errors = 1; 3068 va_start(ap, fmt); 3069 fprintf(stderr, "%s:%d: ", infile, yylval.lineno); 3070 vfprintf(stderr, fmt, ap); 3071 fprintf(stderr, "\n"); 3072 va_end(ap); 3073 return (0); 3074} 3075 3076int 3077disallow_table(struct node_host *h, const char *fmt) 3078{ 3079 for (; h != NULL; h = h->next) 3080 if (h->addr.type == PF_ADDR_TABLE) { 3081 yyerror(fmt, h->addr.v.tblname); 3082 return (1); 3083 } 3084 return (0); 3085} 3086 3087int 3088rule_consistent(struct pf_rule *r) 3089{ 3090 int problems = 0; 3091 3092 switch (r->action) { 3093 case PF_PASS: 3094 case PF_DROP: 3095 case PF_SCRUB: 3096 problems = filter_consistent(r); 3097 break; 3098 case PF_NAT: 3099 case PF_NONAT: 3100 problems = nat_consistent(r); 3101 break; 3102 case PF_RDR: 3103 case PF_NORDR: 3104 problems = rdr_consistent(r); 3105 break; 3106 case PF_BINAT: 3107 case PF_NOBINAT: 3108 default: 3109 break; 3110 } 3111 return (problems); 3112} 3113 3114int 3115filter_consistent(struct pf_rule *r) 3116{ 3117 int problems = 0; 3118 3119 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP && 3120 (r->src.port_op || r->dst.port_op)) { 3121 yyerror("port only applies to tcp/udp"); 3122 problems++; 3123 } 3124 if (r->src.port_op == PF_OP_RRG || r->dst.port_op == PF_OP_RRG) { 3125 yyerror("the ':' port operator only applies to rdr"); 3126 problems++; 3127 } 3128 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 && 3129 (r->type || r->code)) { 3130 yyerror("icmp-type/code only applies to icmp"); 3131 problems++; 3132 } 3133 if (!r->af && (r->type || r->code)) { 3134 yyerror("must indicate address family with icmp-type/code"); 3135 problems++; 3136 } 3137 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) || 3138 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) { 3139 yyerror("proto %s doesn't match address family %s", 3140 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6", 3141 r->af == AF_INET ? "inet" : "inet6"); 3142 problems++; 3143 } 3144 if ((r->keep_state == PF_STATE_MODULATE || r->keep_state == 3145 PF_STATE_SYNPROXY) && r->proto && r->proto != IPPROTO_TCP) { 3146 yyerror("modulate/synproxy state can only be applied to " 3147 "TCP rules"); 3148 problems++; 3149 } 3150 if (r->allow_opts && r->action != PF_PASS) { 3151 yyerror("allow-opts can only be specified for pass rules"); 3152 problems++; 3153 } 3154 if (!r->af && (r->src.addr.type == PF_ADDR_DYNIFTL || 3155 r->dst.addr.type == PF_ADDR_DYNIFTL)) { 3156 yyerror("dynamic addresses require address family " 3157 "(inet/inet6)"); 3158 problems++; 3159 } 3160 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op || 3161 r->dst.port_op || r->flagset || r->type || r->code)) { 3162 yyerror("fragments can be filtered only on IP header fields"); 3163 problems++; 3164 } 3165 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) { 3166 yyerror("return-rst can only be applied to TCP rules"); 3167 problems++; 3168 } 3169 if (r->action == PF_DROP && r->keep_state) { 3170 yyerror("keep state on block rules doesn't make sense"); 3171 problems++; 3172 } 3173 if ((r->tagname[0] || r->match_tagname[0]) && !r->keep_state && 3174 r->action == PF_PASS) { 3175 yyerror("tags cannot be used without keep state"); 3176 problems++; 3177 } 3178 return (-problems); 3179} 3180 3181int 3182nat_consistent(struct pf_rule *r) 3183{ 3184 int problems = 0; 3185 struct pf_pooladdr *pa; 3186 3187 if (r->src.port_op == PF_OP_RRG || r->dst.port_op == PF_OP_RRG) { 3188 yyerror("the ':' port operator only applies to rdr"); 3189 problems++; 3190 } 3191 if (!r->af) { 3192 TAILQ_FOREACH(pa, &r->rpool.list, entries) { 3193 if (pa->addr.type == PF_ADDR_DYNIFTL) { 3194 yyerror("dynamic addresses require " 3195 "address family (inet/inet6)"); 3196 problems++; 3197 break; 3198 } 3199 } 3200 } 3201 return (-problems); 3202} 3203 3204int 3205rdr_consistent(struct pf_rule *r) 3206{ 3207 int problems = 0; 3208 struct pf_pooladdr *pa; 3209 3210 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) { 3211 if (r->src.port_op) { 3212 yyerror("src port only applies to tcp/udp"); 3213 problems++; 3214 } 3215 if (r->dst.port_op) { 3216 yyerror("dst port only applies to tcp/udp"); 3217 problems++; 3218 } 3219 if (r->rpool.proxy_port[0]) { 3220 yyerror("rpool port only applies to tcp/udp"); 3221 problems++; 3222 } 3223 } 3224 if (r->dst.port_op && 3225 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) { 3226 yyerror("invalid port operator for rdr destination port"); 3227 problems++; 3228 } 3229 if (r->src.port_op == PF_OP_RRG) { 3230 yyerror("the ':' port operator only applies to rdr " 3231 "destination port"); 3232 problems++; 3233 } 3234 if (!r->af) { 3235 if (r->src.addr.type == PF_ADDR_DYNIFTL || 3236 r->dst.addr.type == PF_ADDR_DYNIFTL) { 3237 yyerror("dynamic addresses require address family " 3238 "(inet/inet6)"); 3239 problems++; 3240 } else { 3241 TAILQ_FOREACH(pa, &r->rpool.list, entries) { 3242 if (pa->addr.type == PF_ADDR_DYNIFTL) { 3243 yyerror("dynamic addresses require " 3244 "address family (inet/inet6)"); 3245 problems++; 3246 break; 3247 } 3248 } 3249 } 3250 } 3251 return (-problems); 3252} 3253 3254int 3255process_tabledef(char *name, struct table_opts *opts) 3256{ 3257 struct pfr_buffer ab; 3258 struct node_tinit *ti; 3259 3260 bzero(&ab, sizeof(ab)); 3261 ab.pfrb_type = PFRB_ADDRS; 3262 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) { 3263 if (ti->file) 3264 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) { 3265 if (errno) 3266 yyerror("cannot load \"%s\": %s", 3267 ti->file, strerror(errno)); 3268 else 3269 yyerror("file \"%s\" contains bad data", 3270 ti->file); 3271 goto _error; 3272 } 3273 if (ti->host) 3274 if (append_addr_host(&ab, ti->host, 0, 0)) { 3275 yyerror("cannot create address buffer: %s", 3276 strerror(errno)); 3277 goto _error; 3278 } 3279 } 3280 if (pf->opts & PF_OPT_VERBOSE) 3281 print_tabledef(name, opts->flags, opts->init_addr, 3282 &opts->init_nodes); 3283 if (!(pf->opts & PF_OPT_NOACTION) && 3284 pfctl_define_table(name, opts->flags, opts->init_addr, 3285 pf->anchor, pf->ruleset, &ab, pf->tticket)) { 3286 yyerror("cannot define table %s: %s", name, 3287 pfr_strerror(errno)); 3288 goto _error; 3289 } 3290 pf->tdirty = 1; 3291 pfr_buf_clear(&ab); 3292 return (0); 3293_error: 3294 pfr_buf_clear(&ab); 3295 return (-1); 3296} 3297 3298struct keywords { 3299 const char *k_name; 3300 int k_val; 3301}; 3302 3303/* macro gore, but you should've seen the prior indentation nightmare... */ 3304 3305#define FREE_LIST(T,r) \ 3306 do { \ 3307 T *p, *node = r; \ 3308 while (node != NULL) { \ 3309 p = node; \ 3310 node = node->next; \ 3311 free(p); \ 3312 } \ 3313 } while (0) 3314 3315#define LOOP_THROUGH(T,n,r,C) \ 3316 do { \ 3317 T *n; \ 3318 if (r == NULL) { \ 3319 r = calloc(1, sizeof(T)); \ 3320 if (r == NULL) \ 3321 err(1, "LOOP: calloc"); \ 3322 r->next = NULL; \ 3323 } \ 3324 n = r; \ 3325 while (n != NULL) { \ 3326 do { \ 3327 C; \ 3328 } while (0); \ 3329 n = n->next; \ 3330 } \ 3331 } while (0) 3332 3333void 3334expand_label_str(char *label, size_t len, const char *srch, const char *repl) 3335{ 3336 char *tmp; 3337 char *p, *q; 3338 3339 if ((tmp = calloc(1, len)) == NULL) 3340 err(1, "expand_label_str: calloc"); 3341 p = q = label; 3342 while ((q = strstr(p, srch)) != NULL) { 3343 *q = '\0'; 3344 if ((strlcat(tmp, p, len) >= len) || 3345 (strlcat(tmp, repl, len) >= len)) 3346 errx(1, "expand_label: label too long"); 3347 q += strlen(srch); 3348 p = q; 3349 } 3350 if (strlcat(tmp, p, len) >= len) 3351 errx(1, "expand_label: label too long"); 3352 strlcpy(label, tmp, len); /* always fits */ 3353 free(tmp); 3354} 3355 3356void 3357expand_label_if(const char *name, char *label, size_t len, const char *ifname) 3358{ 3359 if (strstr(label, name) != NULL) { 3360 if (!*ifname) 3361 expand_label_str(label, len, name, "any"); 3362 else 3363 expand_label_str(label, len, name, ifname); 3364 } 3365} 3366 3367void 3368expand_label_addr(const char *name, char *label, size_t len, sa_family_t af, 3369 struct node_host *h) 3370{ 3371 char tmp[64], tmp_not[66]; 3372 3373 if (strstr(label, name) != NULL) { 3374 switch (h->addr.type) { 3375 case PF_ADDR_DYNIFTL: 3376 snprintf(tmp, sizeof(tmp), "(%s)", h->addr.v.ifname); 3377 break; 3378 case PF_ADDR_TABLE: 3379 snprintf(tmp, sizeof(tmp), "<%s>", h->addr.v.tblname); 3380 break; 3381 case PF_ADDR_NOROUTE: 3382 snprintf(tmp, sizeof(tmp), "no-route"); 3383 break; 3384 case PF_ADDR_ADDRMASK: 3385 if (!af || (PF_AZERO(&h->addr.v.a.addr, af) && 3386 PF_AZERO(&h->addr.v.a.mask, af))) 3387 snprintf(tmp, sizeof(tmp), "any"); 3388 else { 3389 char a[48]; 3390 int bits; 3391 3392 if (inet_ntop(af, &h->addr.v.a.addr, a, 3393 sizeof(a)) == NULL) 3394 snprintf(tmp, sizeof(tmp), "?"); 3395 else { 3396 bits = unmask(&h->addr.v.a.mask, af); 3397 if ((af == AF_INET && bits < 32) || 3398 (af == AF_INET6 && bits < 128)) 3399 snprintf(tmp, sizeof(tmp), 3400 "%s/%d", a, bits); 3401 else 3402 snprintf(tmp, sizeof(tmp), 3403 "%s", a); 3404 } 3405 } 3406 break; 3407 default: 3408 snprintf(tmp, sizeof(tmp), "?"); 3409 break; 3410 } 3411 3412 if (h->not) { 3413 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp); 3414 expand_label_str(label, len, name, tmp_not); 3415 } else 3416 expand_label_str(label, len, name, tmp); 3417 } 3418} 3419 3420void 3421expand_label_port(const char *name, char *label, size_t len, 3422 struct node_port *port) 3423{ 3424 char a1[6], a2[6], op[13] = ""; 3425 3426 if (strstr(label, name) != NULL) { 3427 snprintf(a1, sizeof(a1), "%u", ntohs(port->port[0])); 3428 snprintf(a2, sizeof(a2), "%u", ntohs(port->port[1])); 3429 if (!port->op) 3430 ; 3431 else if (port->op == PF_OP_IRG) 3432 snprintf(op, sizeof(op), "%s><%s", a1, a2); 3433 else if (port->op == PF_OP_XRG) 3434 snprintf(op, sizeof(op), "%s<>%s", a1, a2); 3435 else if (port->op == PF_OP_EQ) 3436 snprintf(op, sizeof(op), "%s", a1); 3437 else if (port->op == PF_OP_NE) 3438 snprintf(op, sizeof(op), "!=%s", a1); 3439 else if (port->op == PF_OP_LT) 3440 snprintf(op, sizeof(op), "<%s", a1); 3441 else if (port->op == PF_OP_LE) 3442 snprintf(op, sizeof(op), "<=%s", a1); 3443 else if (port->op == PF_OP_GT) 3444 snprintf(op, sizeof(op), ">%s", a1); 3445 else if (port->op == PF_OP_GE) 3446 snprintf(op, sizeof(op), ">=%s", a1); 3447 expand_label_str(label, len, name, op); 3448 } 3449} 3450 3451void 3452expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto) 3453{ 3454 struct protoent *pe; 3455 char n[4]; 3456 3457 if (strstr(label, name) != NULL) { 3458 pe = getprotobynumber(proto); 3459 if (pe != NULL) 3460 expand_label_str(label, len, name, pe->p_name); 3461 else { 3462 snprintf(n, sizeof(n), "%u", proto); 3463 expand_label_str(label, len, name, n); 3464 } 3465 } 3466} 3467 3468void 3469expand_label_nr(const char *name, char *label, size_t len) 3470{ 3471 char n[11]; 3472 3473 if (strstr(label, name) != NULL) { 3474 snprintf(n, sizeof(n), "%u", pf->rule_nr); 3475 expand_label_str(label, len, name, n); 3476 } 3477} 3478 3479void 3480expand_label(char *label, size_t len, const char *ifname, sa_family_t af, 3481 struct node_host *src_host, struct node_port *src_port, 3482 struct node_host *dst_host, struct node_port *dst_port, 3483 u_int8_t proto) 3484{ 3485 expand_label_if("$if", label, len, ifname); 3486 expand_label_addr("$srcaddr", label, len, af, src_host); 3487 expand_label_addr("$dstaddr", label, len, af, dst_host); 3488 expand_label_port("$srcport", label, len, src_port); 3489 expand_label_port("$dstport", label, len, dst_port); 3490 expand_label_proto("$proto", label, len, proto); 3491 expand_label_nr("$nr", label, len); 3492} 3493 3494int 3495expand_altq(struct pf_altq *a, struct node_if *interfaces, 3496 struct node_queue *nqueues, struct node_queue_bw bwspec, 3497 struct node_queue_opt *opts) 3498{ 3499 struct pf_altq pa, pb; 3500 char qname[PF_QNAME_SIZE]; 3501 struct node_queue *n; 3502 struct node_queue_bw bw; 3503 int errs = 0; 3504 3505 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 3506 FREE_LIST(struct node_if, interfaces); 3507 FREE_LIST(struct node_queue, nqueues); 3508 return (0); 3509 } 3510 3511 LOOP_THROUGH(struct node_if, interface, interfaces, 3512 memcpy(&pa, a, sizeof(struct pf_altq)); 3513 if (strlcpy(pa.ifname, interface->ifname, 3514 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 3515 errx(1, "expand_altq: strlcpy"); 3516 3517 if (interface->not) { 3518 yyerror("altq on ! <interface> is not supported"); 3519 errs++; 3520 } else { 3521 if (eval_pfaltq(pf, &pa, &bwspec, opts)) 3522 errs++; 3523 else 3524 if (pfctl_add_altq(pf, &pa)) 3525 errs++; 3526 3527 if (pf->opts & PF_OPT_VERBOSE) { 3528 print_altq(&pf->paltq->altq, 0, 3529 &bwspec, opts); 3530 if (nqueues && nqueues->tail) { 3531 printf("queue { "); 3532 LOOP_THROUGH(struct node_queue, queue, 3533 nqueues, 3534 printf("%s ", 3535 queue->queue); 3536 ); 3537 printf("}"); 3538 } 3539 printf("\n"); 3540 } 3541 3542 if (pa.scheduler == ALTQT_CBQ || 3543 pa.scheduler == ALTQT_HFSC) { 3544 /* now create a root queue */ 3545 memset(&pb, 0, sizeof(struct pf_altq)); 3546 if (strlcpy(qname, "root_", sizeof(qname)) >= 3547 sizeof(qname)) 3548 errx(1, "expand_altq: strlcpy"); 3549 if (strlcat(qname, interface->ifname, 3550 sizeof(qname)) >= sizeof(qname)) 3551 errx(1, "expand_altq: strlcat"); 3552 if (strlcpy(pb.qname, qname, 3553 sizeof(pb.qname)) >= sizeof(pb.qname)) 3554 errx(1, "expand_altq: strlcpy"); 3555 if (strlcpy(pb.ifname, interface->ifname, 3556 sizeof(pb.ifname)) >= sizeof(pb.ifname)) 3557 errx(1, "expand_altq: strlcpy"); 3558 pb.qlimit = pa.qlimit; 3559 pb.scheduler = pa.scheduler; 3560 bw.bw_absolute = pa.ifbandwidth; 3561 bw.bw_percent = 0; 3562 if (eval_pfqueue(pf, &pb, &bw, opts)) 3563 errs++; 3564 else 3565 if (pfctl_add_altq(pf, &pb)) 3566 errs++; 3567 } 3568 3569 LOOP_THROUGH(struct node_queue, queue, nqueues, 3570 n = calloc(1, sizeof(struct node_queue)); 3571 if (n == NULL) 3572 err(1, "expand_altq: calloc"); 3573 if (pa.scheduler == ALTQT_CBQ || 3574 pa.scheduler == ALTQT_HFSC) 3575 if (strlcpy(n->parent, qname, 3576 sizeof(n->parent)) >= 3577 sizeof(n->parent)) 3578 errx(1, "expand_altq: strlcpy"); 3579 if (strlcpy(n->queue, queue->queue, 3580 sizeof(n->queue)) >= sizeof(n->queue)) 3581 errx(1, "expand_altq: strlcpy"); 3582 if (strlcpy(n->ifname, interface->ifname, 3583 sizeof(n->ifname)) >= sizeof(n->ifname)) 3584 errx(1, "expand_altq: strlcpy"); 3585 n->scheduler = pa.scheduler; 3586 n->next = NULL; 3587 n->tail = n; 3588 if (queues == NULL) 3589 queues = n; 3590 else { 3591 queues->tail->next = n; 3592 queues->tail = n; 3593 } 3594 ); 3595 } 3596 ); 3597 FREE_LIST(struct node_if, interfaces); 3598 FREE_LIST(struct node_queue, nqueues); 3599 3600 return (errs); 3601} 3602 3603int 3604expand_queue(struct pf_altq *a, struct node_if *interfaces, 3605 struct node_queue *nqueues, struct node_queue_bw bwspec, 3606 struct node_queue_opt *opts) 3607{ 3608 struct node_queue *n, *nq; 3609 struct pf_altq pa; 3610 u_int8_t found = 0; 3611 u_int8_t errs = 0; 3612 3613 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) { 3614 FREE_LIST(struct node_queue, nqueues); 3615 return (0); 3616 } 3617 3618 if (queues == NULL) { 3619 yyerror("queue %s has no parent", a->qname); 3620 FREE_LIST(struct node_queue, nqueues); 3621 return (1); 3622 } 3623 3624 LOOP_THROUGH(struct node_if, interface, interfaces, 3625 LOOP_THROUGH(struct node_queue, tqueue, queues, 3626 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) && 3627 (interface->ifname[0] == 0 || 3628 (!interface->not && !strncmp(interface->ifname, 3629 tqueue->ifname, IFNAMSIZ)) || 3630 (interface->not && strncmp(interface->ifname, 3631 tqueue->ifname, IFNAMSIZ)))) { 3632 /* found ourself in queues */ 3633 found++; 3634 3635 memcpy(&pa, a, sizeof(struct pf_altq)); 3636 3637 if (pa.scheduler != ALTQT_NONE && 3638 pa.scheduler != tqueue->scheduler) { 3639 yyerror("exactly one scheduler type " 3640 "per interface allowed"); 3641 return (1); 3642 } 3643 pa.scheduler = tqueue->scheduler; 3644 3645 /* scheduler dependent error checking */ 3646 switch (pa.scheduler) { 3647 case ALTQT_PRIQ: 3648 if (nqueues != NULL) { 3649 yyerror("priq queues cannot " 3650 "have child queues"); 3651 return (1); 3652 } 3653 if (bwspec.bw_absolute > 0 || 3654 bwspec.bw_percent < 100) { 3655 yyerror("priq doesn't take " 3656 "bandwidth"); 3657 return (1); 3658 } 3659 break; 3660 default: 3661 break; 3662 } 3663 3664 if (strlcpy(pa.ifname, tqueue->ifname, 3665 sizeof(pa.ifname)) >= sizeof(pa.ifname)) 3666 errx(1, "expand_queue: strlcpy"); 3667 if (strlcpy(pa.parent, tqueue->parent, 3668 sizeof(pa.parent)) >= sizeof(pa.parent)) 3669 errx(1, "expand_queue: strlcpy"); 3670 3671 if (eval_pfqueue(pf, &pa, &bwspec, opts)) 3672 errs++; 3673 else 3674 if (pfctl_add_altq(pf, &pa)) 3675 errs++; 3676 3677 for (nq = nqueues; nq != NULL; nq = nq->next) { 3678 if (!strcmp(a->qname, nq->queue)) { 3679 yyerror("queue cannot have " 3680 "itself as child"); 3681 errs++; 3682 continue; 3683 } 3684 n = calloc(1, 3685 sizeof(struct node_queue)); 3686 if (n == NULL) 3687 err(1, "expand_queue: calloc"); 3688 if (strlcpy(n->parent, a->qname, 3689 sizeof(n->parent)) >= 3690 sizeof(n->parent)) 3691 errx(1, "expand_queue strlcpy"); 3692 if (strlcpy(n->queue, nq->queue, 3693 sizeof(n->queue)) >= 3694 sizeof(n->queue)) 3695 errx(1, "expand_queue strlcpy"); 3696 if (strlcpy(n->ifname, tqueue->ifname, 3697 sizeof(n->ifname)) >= 3698 sizeof(n->ifname)) 3699 errx(1, "expand_queue strlcpy"); 3700 n->scheduler = tqueue->scheduler; 3701 n->next = NULL; 3702 n->tail = n; 3703 if (queues == NULL) 3704 queues = n; 3705 else { 3706 queues->tail->next = n; 3707 queues->tail = n; 3708 } 3709 } 3710 if ((pf->opts & PF_OPT_VERBOSE) && ( 3711 (found == 1 && interface->ifname[0] == 0) || 3712 (found > 0 && interface->ifname[0] != 0))) { 3713 print_queue(&pf->paltq->altq, 0, 3714 &bwspec, interface->ifname[0] != 0, 3715 opts); 3716 if (nqueues && nqueues->tail) { 3717 printf("{ "); 3718 LOOP_THROUGH(struct node_queue, 3719 queue, nqueues, 3720 printf("%s ", 3721 queue->queue); 3722 ); 3723 printf("}"); 3724 } 3725 printf("\n"); 3726 } 3727 } 3728 ); 3729 ); 3730 3731 FREE_LIST(struct node_queue, nqueues); 3732 FREE_LIST(struct node_if, interfaces); 3733 3734 if (!found) { 3735 yyerror("queue %s has no parent", a->qname); 3736 errs++; 3737 } 3738 3739 if (errs) 3740 return (1); 3741 else 3742 return (0); 3743} 3744 3745void 3746expand_rule(struct pf_rule *r, 3747 struct node_if *interfaces, struct node_host *rpool_hosts, 3748 struct node_proto *protos, struct node_os *src_oses, 3749 struct node_host *src_hosts, struct node_port *src_ports, 3750 struct node_host *dst_hosts, struct node_port *dst_ports, 3751 struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types) 3752{ 3753 sa_family_t af = r->af; 3754 int added = 0, error = 0; 3755 char ifname[IF_NAMESIZE]; 3756 char label[PF_RULE_LABEL_SIZE]; 3757 struct pf_pooladdr *pa; 3758 struct node_host *h; 3759 u_int8_t flags, flagset; 3760 3761 if (strlcpy(label, r->label, sizeof(label)) >= sizeof(label)) 3762 errx(1, "expand_rule: strlcpy"); 3763 flags = r->flags; 3764 flagset = r->flagset; 3765 3766 LOOP_THROUGH(struct node_if, interface, interfaces, 3767 LOOP_THROUGH(struct node_proto, proto, protos, 3768 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types, 3769 LOOP_THROUGH(struct node_host, src_host, src_hosts, 3770 LOOP_THROUGH(struct node_port, src_port, src_ports, 3771 LOOP_THROUGH(struct node_os, src_os, src_oses, 3772 LOOP_THROUGH(struct node_host, dst_host, dst_hosts, 3773 LOOP_THROUGH(struct node_port, dst_port, dst_ports, 3774 LOOP_THROUGH(struct node_uid, uid, uids, 3775 LOOP_THROUGH(struct node_gid, gid, gids, 3776 3777 r->af = af; 3778 /* for link-local IPv6 address, interface must match up */ 3779 if ((r->af && src_host->af && r->af != src_host->af) || 3780 (r->af && dst_host->af && r->af != dst_host->af) || 3781 (src_host->af && dst_host->af && 3782 src_host->af != dst_host->af) || 3783 (src_host->ifindex && dst_host->ifindex && 3784 src_host->ifindex != dst_host->ifindex) || 3785 (src_host->ifindex && if_nametoindex(interface->ifname) && 3786 src_host->ifindex != if_nametoindex(interface->ifname)) || 3787 (dst_host->ifindex && if_nametoindex(interface->ifname) && 3788 dst_host->ifindex != if_nametoindex(interface->ifname))) 3789 continue; 3790 if (!r->af && src_host->af) 3791 r->af = src_host->af; 3792 else if (!r->af && dst_host->af) 3793 r->af = dst_host->af; 3794 3795 if (if_indextoname(src_host->ifindex, ifname)) 3796 memcpy(r->ifname, ifname, sizeof(r->ifname)); 3797 else if (if_indextoname(dst_host->ifindex, ifname)) 3798 memcpy(r->ifname, ifname, sizeof(r->ifname)); 3799 else 3800 memcpy(r->ifname, interface->ifname, sizeof(r->ifname)); 3801 3802 if (strlcpy(r->label, label, sizeof(r->label)) >= 3803 sizeof(r->label)) 3804 errx(1, "expand_rule: strlcpy"); 3805 expand_label(r->label, PF_RULE_LABEL_SIZE, r->ifname, r->af, 3806 src_host, src_port, dst_host, dst_port, proto->proto); 3807 expand_label(r->tagname, PF_TAG_NAME_SIZE, r->ifname, r->af, 3808 src_host, src_port, dst_host, dst_port, proto->proto); 3809 expand_label(r->match_tagname, PF_TAG_NAME_SIZE, r->ifname, 3810 r->af, src_host, src_port, dst_host, dst_port, 3811 proto->proto); 3812 3813 error += check_netmask(src_host, r->af); 3814 error += check_netmask(dst_host, r->af); 3815 3816 r->ifnot = interface->not; 3817 r->proto = proto->proto; 3818 r->src.addr = src_host->addr; 3819 r->src.not = src_host->not; 3820 r->src.port[0] = src_port->port[0]; 3821 r->src.port[1] = src_port->port[1]; 3822 r->src.port_op = src_port->op; 3823 r->dst.addr = dst_host->addr; 3824 r->dst.not = dst_host->not; 3825 r->dst.port[0] = dst_port->port[0]; 3826 r->dst.port[1] = dst_port->port[1]; 3827 r->dst.port_op = dst_port->op; 3828 r->uid.op = uid->op; 3829 r->uid.uid[0] = uid->uid[0]; 3830 r->uid.uid[1] = uid->uid[1]; 3831 r->gid.op = gid->op; 3832 r->gid.gid[0] = gid->gid[0]; 3833 r->gid.gid[1] = gid->gid[1]; 3834 r->type = icmp_type->type; 3835 r->code = icmp_type->code; 3836 3837 if (r->proto && r->proto != IPPROTO_TCP) { 3838 r->flags = 0; 3839 r->flagset = 0; 3840 } else { 3841 r->flags = flags; 3842 r->flagset = flagset; 3843 } 3844 if (icmp_type->proto && r->proto != icmp_type->proto) { 3845 yyerror("icmp-type mismatch"); 3846 error++; 3847 } 3848 3849 if (src_os && src_os->os) { 3850 r->os_fingerprint = pfctl_get_fingerprint(src_os->os); 3851 if ((pf->opts & PF_OPT_VERBOSE2) && 3852 r->os_fingerprint == PF_OSFP_NOMATCH) 3853 fprintf(stderr, 3854 "warning: unknown '%s' OS fingerprint\n", 3855 src_os->os); 3856 } else { 3857 r->os_fingerprint = PF_OSFP_ANY; 3858 } 3859 3860 TAILQ_INIT(&r->rpool.list); 3861 for (h = rpool_hosts; h != NULL; h = h->next) { 3862 pa = calloc(1, sizeof(struct pf_pooladdr)); 3863 if (pa == NULL) 3864 err(1, "expand_rule: calloc"); 3865 pa->addr = h->addr; 3866 if (h->ifname != NULL) { 3867 if (strlcpy(pa->ifname, h->ifname, 3868 sizeof(pa->ifname)) >= 3869 sizeof(pa->ifname)) 3870 errx(1, "expand_rule: strlcpy"); 3871 } else 3872 pa->ifname[0] = 0; 3873 TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries); 3874 } 3875 3876 if (rule_consistent(r) < 0 || error) 3877 yyerror("skipping rule due to errors"); 3878 else { 3879 r->nr = pf->rule_nr++; 3880 pfctl_add_rule(pf, r); 3881 added++; 3882 } 3883 3884 )))))))))); 3885 3886 FREE_LIST(struct node_if, interfaces); 3887 FREE_LIST(struct node_proto, protos); 3888 FREE_LIST(struct node_host, src_hosts); 3889 FREE_LIST(struct node_port, src_ports); 3890 FREE_LIST(struct node_os, src_oses); 3891 FREE_LIST(struct node_host, dst_hosts); 3892 FREE_LIST(struct node_port, dst_ports); 3893 FREE_LIST(struct node_uid, uids); 3894 FREE_LIST(struct node_gid, gids); 3895 FREE_LIST(struct node_icmp, icmp_types); 3896 FREE_LIST(struct node_host, rpool_hosts); 3897 3898 if (!added) 3899 yyerror("rule expands to no valid combination"); 3900} 3901 3902#undef FREE_LIST 3903#undef LOOP_THROUGH 3904 3905int 3906check_rulestate(int desired_state) 3907{ 3908 if (require_order && (rulestate > desired_state)) { 3909 yyerror("Rules must be in order: options, normalization, " 3910 "queueing, translation, filtering"); 3911 return (1); 3912 } 3913 rulestate = desired_state; 3914 return (0); 3915} 3916 3917int 3918kw_cmp(const void *k, const void *e) 3919{ 3920 return (strcmp(k, ((const struct keywords *)e)->k_name)); 3921} 3922 3923int 3924lookup(char *s) 3925{ 3926 /* this has to be sorted always */ 3927 static const struct keywords keywords[] = { 3928 { "all", ALL}, 3929 { "allow-opts", ALLOWOPTS}, 3930 { "altq", ALTQ}, 3931 { "anchor", ANCHOR}, 3932 { "antispoof", ANTISPOOF}, 3933 { "any", ANY}, 3934 { "bandwidth", BANDWIDTH}, 3935 { "binat", BINAT}, 3936 { "binat-anchor", BINATANCHOR}, 3937 { "bitmask", BITMASK}, 3938 { "block", BLOCK}, 3939 { "block-policy", BLOCKPOLICY}, 3940 { "cbq", CBQ}, 3941 { "code", CODE}, 3942 { "crop", FRAGCROP}, 3943 { "debug", DEBUG}, 3944 { "drop", DROP}, 3945 { "drop-ovl", FRAGDROP}, 3946 { "dup-to", DUPTO}, 3947 { "fastroute", FASTROUTE}, 3948 { "file", FILENAME}, 3949 { "fingerprints", FINGERPRINTS}, 3950 { "flags", FLAGS}, 3951 { "for", FOR}, 3952 { "fragment", FRAGMENT}, 3953 { "from", FROM}, 3954 { "group", GROUP}, 3955 { "hfsc", HFSC}, 3956 { "icmp-type", ICMPTYPE}, 3957 { "icmp6-type", ICMP6TYPE}, 3958 { "in", IN}, 3959 { "inet", INET}, 3960 { "inet6", INET6}, 3961 { "keep", KEEP}, 3962 { "label", LABEL}, 3963 { "limit", LIMIT}, 3964 { "linkshare", LINKSHARE}, 3965 { "load", LOAD}, 3966 { "log", LOG}, 3967 { "log-all", LOGALL}, 3968 { "loginterface", LOGINTERFACE}, 3969 { "max", MAXIMUM}, 3970 { "max-mss", MAXMSS}, 3971 { "min-ttl", MINTTL}, 3972 { "modulate", MODULATE}, 3973 { "nat", NAT}, 3974 { "nat-anchor", NATANCHOR}, 3975 { "no", NO}, 3976 { "no-df", NODF}, 3977 { "no-route", NOROUTE}, 3978 { "no-sync", NOSYNC}, 3979 { "on", ON}, 3980 { "optimization", OPTIMIZATION}, 3981 { "os", OS}, 3982 { "out", OUT}, 3983 { "pass", PASS}, 3984 { "port", PORT}, 3985 { "priority", PRIORITY}, 3986 { "priq", PRIQ}, 3987 { "proto", PROTO}, 3988 { "qlimit", QLIMIT}, 3989 { "queue", QUEUE}, 3990 { "quick", QUICK}, 3991 { "random", RANDOM}, 3992 { "random-id", RANDOMID}, 3993 { "rdr", RDR}, 3994 { "rdr-anchor", RDRANCHOR}, 3995 { "realtime", REALTIME}, 3996 { "reassemble", REASSEMBLE}, 3997 { "reply-to", REPLYTO}, 3998 { "require-order", REQUIREORDER}, 3999 { "return", RETURN}, 4000 { "return-icmp", RETURNICMP}, 4001 { "return-icmp6", RETURNICMP6}, 4002 { "return-rst", RETURNRST}, 4003 { "round-robin", ROUNDROBIN}, 4004 { "route-to", ROUTETO}, 4005 { "scrub", SCRUB}, 4006 { "set", SET}, 4007 { "source-hash", SOURCEHASH}, 4008 { "state", STATE}, 4009 { "static-port", STATICPORT}, 4010 { "synproxy", SYNPROXY}, 4011 { "table", TABLE}, 4012 { "tag", TAG}, 4013 { "tagged", TAGGED}, 4014 { "tbrsize", TBRSIZE}, 4015 { "timeout", TIMEOUT}, 4016 { "to", TO}, 4017 { "tos", TOS}, 4018 { "ttl", TTL}, 4019 { "upperlimit", UPPERLIMIT}, 4020 { "user", USER}, 4021 }; 4022 const struct keywords *p; 4023 4024 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]), 4025 sizeof(keywords[0]), kw_cmp); 4026 4027 if (p) { 4028 if (debug > 1) 4029 fprintf(stderr, "%s: %d\n", s, p->k_val); 4030 return (p->k_val); 4031 } else { 4032 if (debug > 1) 4033 fprintf(stderr, "string: %s\n", s); 4034 return (STRING); 4035 } 4036} 4037 4038#define MAXPUSHBACK 128 4039 4040char *parsebuf; 4041int parseindex; 4042char pushback_buffer[MAXPUSHBACK]; 4043int pushback_index = 0; 4044 4045int 4046lgetc(FILE *f) 4047{ 4048 int c, next; 4049 4050 if (parsebuf) { 4051 /* Read character from the parsebuffer instead of input. */ 4052 if (parseindex >= 0) { 4053 c = parsebuf[parseindex++]; 4054 if (c != '\0') 4055 return (c); 4056 parsebuf = NULL; 4057 } else 4058 parseindex++; 4059 } 4060 4061 if (pushback_index) 4062 return (pushback_buffer[--pushback_index]); 4063 4064 while ((c = getc(f)) == '\\') { 4065 next = getc(f); 4066 if (next != '\n') { 4067 if (isspace(next)) 4068 yyerror("whitespace after \\"); 4069 ungetc(next, f); 4070 break; 4071 } 4072 yylval.lineno = lineno; 4073 lineno++; 4074 } 4075 if (c == '\t' || c == ' ') { 4076 /* Compress blanks to a single space. */ 4077 do { 4078 c = getc(f); 4079 } while (c == '\t' || c == ' '); 4080 ungetc(c, f); 4081 c = ' '; 4082 } 4083 4084 return (c); 4085} 4086 4087int 4088lungetc(int c) 4089{ 4090 if (c == EOF) 4091 return (EOF); 4092 if (parsebuf) { 4093 parseindex--; 4094 if (parseindex >= 0) 4095 return (c); 4096 } 4097 if (pushback_index < MAXPUSHBACK-1) 4098 return (pushback_buffer[pushback_index++] = c); 4099 else 4100 return (EOF); 4101} 4102 4103int 4104findeol(void) 4105{ 4106 int c; 4107 4108 parsebuf = NULL; 4109 pushback_index = 0; 4110 4111 /* skip to either EOF or the first real EOL */ 4112 while (1) { 4113 c = lgetc(fin); 4114 if (c == '\n') { 4115 lineno++; 4116 break; 4117 } 4118 if (c == EOF) 4119 break; 4120 } 4121 return (ERROR); 4122} 4123 4124int 4125yylex(void) 4126{ 4127 char buf[8096]; 4128 char *p, *val; 4129 int endc, c, next; 4130 int token; 4131 4132top: 4133 p = buf; 4134 while ((c = lgetc(fin)) == ' ') 4135 ; /* nothing */ 4136 4137 yylval.lineno = lineno; 4138 if (c == '#') 4139 while ((c = lgetc(fin)) != '\n' && c != EOF) 4140 ; /* nothing */ 4141 if (c == '$' && parsebuf == NULL) { 4142 while (1) { 4143 if ((c = lgetc(fin)) == EOF) 4144 return (0); 4145 4146 if (p + 1 >= buf + sizeof(buf) - 1) { 4147 yyerror("string too long"); 4148 return (findeol()); 4149 } 4150 if (isalnum(c) || c == '_') { 4151 *p++ = (char)c; 4152 continue; 4153 } 4154 *p = '\0'; 4155 lungetc(c); 4156 break; 4157 } 4158 val = symget(buf); 4159 if (val == NULL) { 4160 yyerror("macro '%s' not defined", buf); 4161 return (findeol()); 4162 } 4163 parsebuf = val; 4164 parseindex = 0; 4165 goto top; 4166 } 4167 4168 switch (c) { 4169 case '\'': 4170 case '"': 4171 endc = c; 4172 while (1) { 4173 if ((c = lgetc(fin)) == EOF) 4174 return (0); 4175 if (c == endc) { 4176 *p = '\0'; 4177 break; 4178 } 4179 if (c == '\n') { 4180 lineno++; 4181 continue; 4182 } 4183 if (p + 1 >= buf + sizeof(buf) - 1) { 4184 yyerror("string too long"); 4185 return (findeol()); 4186 } 4187 *p++ = (char)c; 4188 } 4189 yylval.v.string = strdup(buf); 4190 if (yylval.v.string == NULL) 4191 err(1, "yylex: strdup"); 4192 return (STRING); 4193 case '<': 4194 next = lgetc(fin); 4195 if (next == '>') { 4196 yylval.v.i = PF_OP_XRG; 4197 return (PORTBINARY); 4198 } 4199 lungetc(next); 4200 break; 4201 case '>': 4202 next = lgetc(fin); 4203 if (next == '<') { 4204 yylval.v.i = PF_OP_IRG; 4205 return (PORTBINARY); 4206 } 4207 lungetc(next); 4208 break; 4209 case '-': 4210 next = lgetc(fin); 4211 if (next == '>') 4212 return (ARROW); 4213 lungetc(next); 4214 break; 4215 } 4216 4217#define allowed_in_string(x) \ 4218 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \ 4219 x != '{' && x != '}' && x != '<' && x != '>' && \ 4220 x != '!' && x != '=' && x != '/' && x != '#' && \ 4221 x != ',')) 4222 4223 if (isalnum(c) || c == ':' || c == '_') { 4224 do { 4225 *p++ = c; 4226 if ((unsigned)(p-buf) >= sizeof(buf)) { 4227 yyerror("string too long"); 4228 return (findeol()); 4229 } 4230 } while ((c = lgetc(fin)) != EOF && (allowed_in_string(c))); 4231 lungetc(c); 4232 *p = '\0'; 4233 token = lookup(buf); 4234 yylval.v.string = strdup(buf); 4235 if (yylval.v.string == NULL) 4236 err(1, "yylex: strdup"); 4237 return (token); 4238 } 4239 if (c == '\n') { 4240 yylval.lineno = lineno; 4241 lineno++; 4242 } 4243 if (c == EOF) 4244 return (0); 4245 return (c); 4246} 4247 4248int 4249parse_rules(FILE *input, struct pfctl *xpf) 4250{ 4251 struct sym *sym; 4252 4253 fin = input; 4254 pf = xpf; 4255 lineno = 1; 4256 errors = 0; 4257 rulestate = PFCTL_STATE_NONE; 4258 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT; 4259 returnicmp6default = 4260 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT; 4261 blockpolicy = PFRULE_DROP; 4262 require_order = 1; 4263 4264 yyparse(); 4265 4266 /* Free macros and check which have not been used. */ 4267 TAILQ_FOREACH(sym, &symhead, entries) { 4268 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used) 4269 fprintf(stderr, "warning: macro '%s' not " 4270 "used\n", sym->nam); 4271 free(sym->nam); 4272 free(sym->val); 4273 TAILQ_REMOVE(&symhead, sym, entries); 4274 } 4275 4276 return (errors ? -1 : 0); 4277} 4278 4279/* 4280 * Over-designed efficiency is a French and German concept, so how about 4281 * we wait until they discover this ugliness and make it all fancy. 4282 */ 4283int 4284symset(const char *nam, const char *val, int persist) 4285{ 4286 struct sym *sym; 4287 4288 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam); 4289 sym = TAILQ_NEXT(sym, entries)) 4290 ; /* nothing */ 4291 4292 if (sym != NULL) { 4293 if (sym->persist == 1) 4294 return (0); 4295 else { 4296 free(sym->nam); 4297 free(sym->val); 4298 TAILQ_REMOVE(&symhead, sym, entries); 4299 free(sym); 4300 } 4301 } 4302 if ((sym = calloc(1, sizeof(*sym))) == NULL) 4303 return (-1); 4304 4305 sym->nam = strdup(nam); 4306 if (sym->nam == NULL) { 4307 free(sym); 4308 return (-1); 4309 } 4310 sym->val = strdup(val); 4311 if (sym->val == NULL) { 4312 free(sym->nam); 4313 free(sym); 4314 return (-1); 4315 } 4316 sym->used = 0; 4317 sym->persist = persist; 4318 TAILQ_INSERT_TAIL(&symhead, sym, entries); 4319 return (0); 4320} 4321 4322int 4323pfctl_cmdline_symset(char *s) 4324{ 4325 char *sym, *val; 4326 int ret; 4327 4328 if ((val = strrchr(s, '=')) == NULL) 4329 return (-1); 4330 4331 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL) 4332 err(1, "pfctl_cmdline_symset: malloc"); 4333 4334 strlcpy(sym, s, strlen(s) - strlen(val) + 1); 4335 4336 ret = symset(sym, val + 1, 1); 4337 free(sym); 4338 4339 return (ret); 4340} 4341 4342char * 4343symget(const char *nam) 4344{ 4345 struct sym *sym; 4346 4347 TAILQ_FOREACH(sym, &symhead, entries) 4348 if (strcmp(nam, sym->nam) == 0) { 4349 sym->used = 1; 4350 return (sym->val); 4351 } 4352 return (NULL); 4353} 4354 4355void 4356decide_address_family(struct node_host *n, sa_family_t *af) 4357{ 4358 sa_family_t target_af = 0; 4359 4360 while (!*af && n != NULL) { 4361 if (n->af) { 4362 if (target_af == 0) 4363 target_af = n->af; 4364 if (target_af != n->af) 4365 return; 4366 } 4367 n = n->next; 4368 } 4369 if (!*af && target_af) 4370 *af = target_af; 4371} 4372 4373void 4374remove_invalid_hosts(struct node_host **nh, sa_family_t *af) 4375{ 4376 struct node_host *n = *nh, *prev = NULL; 4377 4378 while (n != NULL) { 4379 if (*af && n->af && n->af != *af) { 4380 /* unlink and free n */ 4381 struct node_host *next = n->next; 4382 4383 /* adjust tail pointer */ 4384 if (n == (*nh)->tail) 4385 (*nh)->tail = prev; 4386 /* adjust previous node's next pointer */ 4387 if (prev == NULL) 4388 *nh = next; 4389 else 4390 prev->next = next; 4391 /* free node */ 4392 if (n->ifname != NULL) 4393 free(n->ifname); 4394 free(n); 4395 n = next; 4396 } else { 4397 if (n->af && !*af) 4398 *af = n->af; 4399 prev = n; 4400 n = n->next; 4401 } 4402 } 4403} 4404 4405int 4406invalid_redirect(struct node_host *nh, sa_family_t af) 4407{ 4408 if (!af) { 4409 struct node_host *n; 4410 4411 /* only tables are ok without an address family */ 4412 for (n = nh; n != NULL; n = n->next) { 4413 if (n->addr.type != PF_ADDR_TABLE) { 4414 yyerror("address family not given and " 4415 "translation address expands to multiple " 4416 "address families"); 4417 return (1); 4418 } 4419 } 4420 } 4421 if (nh == NULL) { 4422 yyerror("no translation address with matching address family " 4423 "found."); 4424 return (1); 4425 } 4426 return (0); 4427} 4428 4429int 4430atoul(char *s, u_long *ulvalp) 4431{ 4432 u_long ulval; 4433 char *ep; 4434 4435 errno = 0; 4436 ulval = strtoul(s, &ep, 0); 4437 if (s[0] == '\0' || *ep != '\0') 4438 return (-1); 4439 if (errno == ERANGE && ulval == ULONG_MAX) 4440 return (-1); 4441 *ulvalp = ulval; 4442 return (0); 4443} 4444 4445int 4446getservice(char *n) 4447{ 4448 struct servent *s; 4449 u_long ulval; 4450 4451 if (atoul(n, &ulval) == 0) { 4452 if (ulval > 65535) { 4453 yyerror("illegal port value %d", ulval); 4454 return (-1); 4455 } 4456 return (htons(ulval)); 4457 } else { 4458 s = getservbyname(n, "tcp"); 4459 if (s == NULL) 4460 s = getservbyname(n, "udp"); 4461 if (s == NULL) { 4462 yyerror("unknown port %s", n); 4463 return (-1); 4464 } 4465 return (s->s_port); 4466 } 4467} 4468 4469int 4470rule_label(struct pf_rule *r, char *s) 4471{ 4472 if (s) { 4473 if (strlcpy(r->label, s, sizeof(r->label)) >= 4474 sizeof(r->label)) { 4475 yyerror("rule label too long (max %d chars)", 4476 sizeof(r->label)-1); 4477 return (-1); 4478 } 4479 } 4480 return (0); 4481} 4482 4483u_int16_t 4484parseicmpspec(char *w, sa_family_t af) 4485{ 4486 const struct icmpcodeent *p; 4487 u_long ulval; 4488 u_int8_t icmptype; 4489 4490 if (af == AF_INET) 4491 icmptype = returnicmpdefault >> 8; 4492 else 4493 icmptype = returnicmp6default >> 8; 4494 4495 if (atoul(w, &ulval) == -1) { 4496 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) { 4497 yyerror("unknown icmp code %s", w); 4498 return (0); 4499 } 4500 ulval = p->code; 4501 } 4502 if (ulval > 255) { 4503 yyerror("invalid icmp code %ld", ulval); 4504 return (0); 4505 } 4506 return (icmptype << 8 | ulval); 4507} 4508 4509int 4510pfctl_load_anchors(int dev, int opts, struct pfr_buffer *trans) 4511{ 4512 struct loadanchors *la; 4513 4514 TAILQ_FOREACH(la, &loadanchorshead, entries) { 4515 if (opts & PF_OPT_VERBOSE) 4516 fprintf(stderr, "\nLoading anchor %s:%s from %s\n", 4517 la->anchorname, la->rulesetname, la->filename); 4518 if (pfctl_rules(dev, la->filename, opts, la->anchorname, 4519 la->rulesetname, trans) == -1) 4520 return (-1); 4521 } 4522 4523 return (0); 4524} 4525 4526