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