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 #define PFIOC_USE_LATEST
36
37 #include <sys/types.h>
38 #include <sys/socket.h>
39 #include <sys/stat.h>
40 #ifdef __FreeBSD__
41 #include <sys/sysctl.h>
42 #endif
43 #include <net/if.h>
44 #include <netinet/in.h>
45 #include <netinet/in_systm.h>
46 #include <netinet/ip.h>
47 #include <netinet/ip_icmp.h>
48 #include <netinet/icmp6.h>
49 #include <net/pfvar.h>
50 #include <arpa/inet.h>
51 #include <net/altq/altq.h>
52 #include <net/altq/altq_cbq.h>
53 #include <net/altq/altq_codel.h>
54 #include <net/altq/altq_priq.h>
55 #include <net/altq/altq_hfsc.h>
56 #include <net/altq/altq_fairq.h>
57
58 #include <assert.h>
59 #include <stdio.h>
60 #include <unistd.h>
61 #include <stdlib.h>
62 #include <netdb.h>
63 #include <stdarg.h>
64 #include <errno.h>
65 #include <string.h>
66 #include <ctype.h>
67 #include <math.h>
68 #include <err.h>
69 #include <limits.h>
70 #include <pwd.h>
71 #include <grp.h>
72 #include <md5.h>
73
74 #include "pfctl_parser.h"
75 #include "pfctl.h"
76
77 static struct pfctl *pf = NULL;
78 static int debug = 0;
79 static int rulestate = 0;
80 static u_int16_t returnicmpdefault =
81 (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
82 static u_int16_t returnicmp6default =
83 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
84 static int blockpolicy = PFRULE_DROP;
85 static int failpolicy = PFRULE_DROP;
86 static int require_order = 1;
87 static int default_statelock;
88
89 static TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
90 static struct file {
91 TAILQ_ENTRY(file) entry;
92 FILE *stream;
93 char *name;
94 int lineno;
95 int errors;
96 } *file;
97 struct file *pushfile(const char *, int);
98 int popfile(void);
99 int check_file_secrecy(int, const char *);
100 int yyparse(void);
101 int yylex(void);
102 int yyerror(const char *, ...);
103 int kw_cmp(const void *, const void *);
104 int lookup(char *);
105 int lgetc(int);
106 int lungetc(int);
107 int findeol(void);
108
109 static TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
110 struct sym {
111 TAILQ_ENTRY(sym) entry;
112 int used;
113 int persist;
114 char *nam;
115 char *val;
116 };
117 int symset(const char *, const char *, int);
118 char *symget(const char *);
119
120 int atoul(char *, u_long *);
121
122 enum {
123 PFCTL_STATE_NONE,
124 PFCTL_STATE_OPTION,
125 PFCTL_STATE_SCRUB,
126 PFCTL_STATE_QUEUE,
127 PFCTL_STATE_NAT,
128 PFCTL_STATE_FILTER
129 };
130
131 struct node_proto {
132 u_int8_t proto;
133 struct node_proto *next;
134 struct node_proto *tail;
135 };
136
137 struct node_port {
138 u_int16_t port[2];
139 u_int8_t op;
140 struct node_port *next;
141 struct node_port *tail;
142 };
143
144 struct node_uid {
145 uid_t uid[2];
146 u_int8_t op;
147 struct node_uid *next;
148 struct node_uid *tail;
149 };
150
151 struct node_gid {
152 gid_t gid[2];
153 u_int8_t op;
154 struct node_gid *next;
155 struct node_gid *tail;
156 };
157
158 struct node_icmp {
159 u_int8_t code;
160 u_int8_t type;
161 u_int8_t proto;
162 struct node_icmp *next;
163 struct node_icmp *tail;
164 };
165
166 enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
167 PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
168 PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
169 PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
170 PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY, };
171
172 enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
173
174 struct node_state_opt {
175 int type;
176 union {
177 u_int32_t max_states;
178 u_int32_t max_src_states;
179 u_int32_t max_src_conn;
180 struct {
181 u_int32_t limit;
182 u_int32_t seconds;
183 } max_src_conn_rate;
184 struct {
185 u_int8_t flush;
186 char tblname[PF_TABLE_NAME_SIZE];
187 } overload;
188 u_int32_t max_src_nodes;
189 u_int8_t src_track;
190 u_int32_t statelock;
191 struct {
192 int number;
193 u_int32_t seconds;
194 } timeout;
195 } data;
196 struct node_state_opt *next;
197 struct node_state_opt *tail;
198 };
199
200 struct peer {
201 struct node_host *host;
202 struct node_port *port;
203 };
204
205 static struct node_queue {
206 char queue[PF_QNAME_SIZE];
207 char parent[PF_QNAME_SIZE];
208 char ifname[IFNAMSIZ];
209 int scheduler;
210 struct node_queue *next;
211 struct node_queue *tail;
212 } *queues = NULL;
213
214 struct node_qassign {
215 char *qname;
216 char *pqname;
217 };
218
219 static struct filter_opts {
220 int marker;
221 #define FOM_FLAGS 0x01
222 #define FOM_ICMP 0x02
223 #define FOM_TOS 0x04
224 #define FOM_KEEP 0x08
225 #define FOM_SRCTRACK 0x10
226 #define FOM_SETPRIO 0x0400
227 #define FOM_PRIO 0x2000
228 struct node_uid *uid;
229 struct node_gid *gid;
230 struct {
231 u_int8_t b1;
232 u_int8_t b2;
233 u_int16_t w;
234 u_int16_t w2;
235 } flags;
236 struct node_icmp *icmpspec;
237 u_int32_t tos;
238 u_int32_t prob;
239 u_int32_t ridentifier;
240 struct {
241 int action;
242 struct node_state_opt *options;
243 } keep;
244 int fragment;
245 int allowopts;
246 char *label[PF_RULE_MAX_LABEL_COUNT];
247 int labelcount;
248 struct node_qassign queues;
249 char *tag;
250 char *match_tag;
251 u_int8_t match_tag_not;
252 u_int rtableid;
253 u_int8_t prio;
254 u_int8_t set_prio[2];
255 struct {
256 struct node_host *addr;
257 u_int16_t port;
258 } divert;
259 } filter_opts;
260
261 static struct antispoof_opts {
262 char *label[PF_RULE_MAX_LABEL_COUNT];
263 int labelcount;
264 u_int32_t ridentifier;
265 u_int rtableid;
266 } antispoof_opts;
267
268 static struct scrub_opts {
269 int marker;
270 #define SOM_MINTTL 0x01
271 #define SOM_MAXMSS 0x02
272 #define SOM_FRAGCACHE 0x04
273 #define SOM_SETTOS 0x08
274 int nodf;
275 int minttl;
276 int maxmss;
277 int settos;
278 int fragcache;
279 int randomid;
280 int reassemble_tcp;
281 char *match_tag;
282 u_int8_t match_tag_not;
283 u_int rtableid;
284 } scrub_opts;
285
286 static struct queue_opts {
287 int marker;
288 #define QOM_BWSPEC 0x01
289 #define QOM_SCHEDULER 0x02
290 #define QOM_PRIORITY 0x04
291 #define QOM_TBRSIZE 0x08
292 #define QOM_QLIMIT 0x10
293 struct node_queue_bw queue_bwspec;
294 struct node_queue_opt scheduler;
295 int priority;
296 unsigned int tbrsize;
297 int qlimit;
298 } queue_opts;
299
300 static struct table_opts {
301 int flags;
302 int init_addr;
303 struct node_tinithead init_nodes;
304 } table_opts;
305
306 static struct pool_opts {
307 int marker;
308 #define POM_TYPE 0x01
309 #define POM_STICKYADDRESS 0x02
310 u_int8_t opts;
311 int type;
312 int staticport;
313 struct pf_poolhashkey *key;
314 struct pf_mape_portset mape;
315
316 } pool_opts;
317
318 static struct codel_opts codel_opts;
319 static struct node_hfsc_opts hfsc_opts;
320 static struct node_fairq_opts fairq_opts;
321 static struct node_state_opt *keep_state_defaults = NULL;
322 static struct pfctl_watermarks syncookie_opts;
323
324 int disallow_table(struct node_host *, const char *);
325 int disallow_urpf_failed(struct node_host *, const char *);
326 int disallow_alias(struct node_host *, const char *);
327 int rule_consistent(struct pfctl_rule *, int);
328 int filter_consistent(struct pfctl_rule *, int);
329 int nat_consistent(struct pfctl_rule *);
330 int rdr_consistent(struct pfctl_rule *);
331 int process_tabledef(char *, struct table_opts *);
332 void expand_label_str(char *, size_t, const char *, const char *);
333 void expand_label_if(const char *, char *, size_t, const char *);
334 void expand_label_addr(const char *, char *, size_t, u_int8_t,
335 struct pf_rule_addr *);
336 void expand_label_port(const char *, char *, size_t,
337 struct pf_rule_addr *);
338 void expand_label_proto(const char *, char *, size_t, u_int8_t);
339 void expand_label_nr(const char *, char *, size_t,
340 struct pfctl_rule *);
341 void expand_rule(struct pfctl_rule *, struct node_if *,
342 struct node_host *, struct node_proto *, struct node_os *,
343 struct node_host *, struct node_port *, struct node_host *,
344 struct node_port *, struct node_uid *, struct node_gid *,
345 struct node_icmp *, const char *);
346 int expand_altq(struct pf_altq *, struct node_if *,
347 struct node_queue *, struct node_queue_bw bwspec,
348 struct node_queue_opt *);
349 int expand_queue(struct pf_altq *, struct node_if *,
350 struct node_queue *, struct node_queue_bw,
351 struct node_queue_opt *);
352 int expand_skip_interface(struct node_if *);
353
354 int check_rulestate(int);
355 int getservice(char *);
356 int rule_label(struct pfctl_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]);
357 int rt_tableid_max(void);
358
359 void mv_rules(struct pfctl_ruleset *, struct pfctl_ruleset *);
360 void decide_address_family(struct node_host *, sa_family_t *);
361 void remove_invalid_hosts(struct node_host **, sa_family_t *);
362 int invalid_redirect(struct node_host *, sa_family_t);
363 u_int16_t parseicmpspec(char *, sa_family_t);
364 int kw_casecmp(const void *, const void *);
365 int map_tos(char *string, int *);
366
367 static TAILQ_HEAD(loadanchorshead, loadanchors)
368 loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
369
370 struct loadanchors {
371 TAILQ_ENTRY(loadanchors) entries;
372 char *anchorname;
373 char *filename;
374 };
375
376 typedef struct {
377 union {
378 int64_t number;
379 double probability;
380 int i;
381 char *string;
382 u_int rtableid;
383 struct {
384 u_int8_t b1;
385 u_int8_t b2;
386 u_int16_t w;
387 u_int16_t w2;
388 } b;
389 struct range {
390 int a;
391 int b;
392 int t;
393 } range;
394 struct node_if *interface;
395 struct node_proto *proto;
396 struct node_icmp *icmp;
397 struct node_host *host;
398 struct node_os *os;
399 struct node_port *port;
400 struct node_uid *uid;
401 struct node_gid *gid;
402 struct node_state_opt *state_opt;
403 struct peer peer;
404 struct {
405 struct peer src, dst;
406 struct node_os *src_os;
407 } fromto;
408 struct {
409 struct node_host *host;
410 u_int8_t rt;
411 u_int8_t pool_opts;
412 sa_family_t af;
413 struct pf_poolhashkey *key;
414 } route;
415 struct redirection {
416 struct node_host *host;
417 struct range rport;
418 } *redirection;
419 struct {
420 int action;
421 struct node_state_opt *options;
422 } keep_state;
423 struct {
424 u_int8_t log;
425 u_int8_t logif;
426 u_int8_t quick;
427 } logquick;
428 struct {
429 int neg;
430 char *name;
431 } tagged;
432 struct pf_poolhashkey *hashkey;
433 struct node_queue *queue;
434 struct node_queue_opt queue_options;
435 struct node_queue_bw queue_bwspec;
436 struct node_qassign qassign;
437 struct filter_opts filter_opts;
438 struct antispoof_opts antispoof_opts;
439 struct queue_opts queue_opts;
440 struct scrub_opts scrub_opts;
441 struct table_opts table_opts;
442 struct pool_opts pool_opts;
443 struct node_hfsc_opts hfsc_opts;
444 struct node_fairq_opts fairq_opts;
445 struct codel_opts codel_opts;
446 struct pfctl_watermarks *watermarks;
447 } v;
448 int lineno;
449 } YYSTYPE;
450
451 #define PPORT_RANGE 1
452 #define PPORT_STAR 2
453 int parseport(char *, struct range *r, int);
454
455 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
456 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \
457 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
458
459 %}
460
461 %token PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
462 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
463 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
464 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
465 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
466 %token REASSEMBLE FRAGDROP FRAGCROP ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
467 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY
468 %token RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
469 %token ANTISPOOF FOR INCLUDE KEEPCOUNTERS SYNCOOKIES
470 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET
471 %token ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME
472 %token UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL
473 %token RIDENTIFIER
474 %token LOAD RULESET_OPTIMIZATION PRIO
475 %token STICKYADDRESS MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
476 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY
477 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
478 %token DIVERTTO DIVERTREPLY
479 %token <v.string> STRING
480 %token <v.number> NUMBER
481 %token <v.i> PORTBINARY
482 %type <v.interface> interface if_list if_item_not if_item
483 %type <v.number> number icmptype icmp6type uid gid
484 %type <v.number> tos not yesno
485 %type <v.probability> probability
486 %type <v.i> no dir af fragcache optimizer syncookie_val
487 %type <v.i> sourcetrack flush unaryop statelock
488 %type <v.b> action nataction natpasslog scrubaction
489 %type <v.b> flags flag blockspec prio
490 %type <v.range> portplain portstar portrange
491 %type <v.hashkey> hashkey
492 %type <v.proto> proto proto_list proto_item
493 %type <v.number> protoval
494 %type <v.icmp> icmpspec
495 %type <v.icmp> icmp_list icmp_item
496 %type <v.icmp> icmp6_list icmp6_item
497 %type <v.number> reticmpspec reticmp6spec
498 %type <v.fromto> fromto
499 %type <v.peer> ipportspec from to
500 %type <v.host> ipspec toipspec xhost host dynaddr host_list
501 %type <v.host> redir_host_list redirspec
502 %type <v.host> route_host route_host_list routespec
503 %type <v.os> os xos os_list
504 %type <v.port> portspec port_list port_item
505 %type <v.uid> uids uid_list uid_item
506 %type <v.gid> gids gid_list gid_item
507 %type <v.route> route
508 %type <v.redirection> redirection redirpool
509 %type <v.string> label stringall tag anchorname
510 %type <v.string> string varstring numberstring
511 %type <v.keep_state> keep
512 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item
513 %type <v.logquick> logquick quick log logopts logopt
514 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if
515 %type <v.qassign> qname
516 %type <v.queue> qassign qassign_list qassign_item
517 %type <v.queue_options> scheduler
518 %type <v.number> cbqflags_list cbqflags_item
519 %type <v.number> priqflags_list priqflags_item
520 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts
521 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts
522 %type <v.codel_opts> codelopts_list codelopts_item codel_opts
523 %type <v.queue_bwspec> bandwidth
524 %type <v.filter_opts> filter_opts filter_opt filter_opts_l
525 %type <v.filter_opts> filter_sets filter_set filter_sets_l
526 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l
527 %type <v.queue_opts> queue_opts queue_opt queue_opts_l
528 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l
529 %type <v.table_opts> table_opts table_opt table_opts_l
530 %type <v.pool_opts> pool_opts pool_opt pool_opts_l
531 %type <v.tagged> tagged
532 %type <v.rtableid> rtable
533 %type <v.watermarks> syncookie_opts
534 %%
535
536 ruleset : /* empty */
537 | ruleset include '\n'
538 | ruleset '\n'
539 | ruleset option '\n'
540 | ruleset scrubrule '\n'
541 | ruleset natrule '\n'
542 | ruleset binatrule '\n'
543 | ruleset pfrule '\n'
544 | ruleset anchorrule '\n'
545 | ruleset loadrule '\n'
546 | ruleset altqif '\n'
547 | ruleset queuespec '\n'
548 | ruleset varset '\n'
549 | ruleset antispoof '\n'
550 | ruleset tabledef '\n'
551 | '{' fakeanchor '}' '\n';
552 | ruleset error '\n' { file->errors++; }
553 ;
554
555 include : INCLUDE STRING {
556 struct file *nfile;
557
558 if ((nfile = pushfile($2, 0)) == NULL) {
559 yyerror("failed to include file %s", $2);
560 free($2);
561 YYERROR;
562 }
563 free($2);
564
565 file = nfile;
566 lungetc('\n');
567 }
568 ;
569
570 /*
571 * apply to previouslys specified rule: must be careful to note
572 * what that is: pf or nat or binat or rdr
573 */
574 fakeanchor : fakeanchor '\n'
575 | fakeanchor anchorrule '\n'
576 | fakeanchor binatrule '\n'
577 | fakeanchor natrule '\n'
578 | fakeanchor pfrule '\n'
579 | fakeanchor error '\n'
580 ;
581
582 optimizer : string {
583 if (!strcmp($1, "none"))
584 $$ = 0;
585 else if (!strcmp($1, "basic"))
586 $$ = PF_OPTIMIZE_BASIC;
587 else if (!strcmp($1, "profile"))
588 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
589 else {
590 yyerror("unknown ruleset-optimization %s", $1);
591 YYERROR;
592 }
593 }
594 ;
595
596 option : SET OPTIMIZATION STRING {
597 if (check_rulestate(PFCTL_STATE_OPTION)) {
598 free($3);
599 YYERROR;
600 }
601 if (pfctl_set_optimization(pf, $3) != 0) {
602 yyerror("unknown optimization %s", $3);
603 free($3);
604 YYERROR;
605 }
606 free($3);
607 }
608 | SET RULESET_OPTIMIZATION optimizer {
609 if (!(pf->opts & PF_OPT_OPTIMIZE)) {
610 pf->opts |= PF_OPT_OPTIMIZE;
611 pf->optimize = $3;
612 }
613 }
614 | SET TIMEOUT timeout_spec
615 | SET TIMEOUT '{' optnl timeout_list '}'
616 | SET LIMIT limit_spec
617 | SET LIMIT '{' optnl limit_list '}'
618 | SET LOGINTERFACE stringall {
619 if (check_rulestate(PFCTL_STATE_OPTION)) {
620 free($3);
621 YYERROR;
622 }
623 if (pfctl_set_logif(pf, $3) != 0) {
624 yyerror("error setting loginterface %s", $3);
625 free($3);
626 YYERROR;
627 }
628 free($3);
629 }
630 | SET HOSTID number {
631 if ($3 == 0 || $3 > UINT_MAX) {
632 yyerror("hostid must be non-zero");
633 YYERROR;
634 }
635 if (pfctl_set_hostid(pf, $3) != 0) {
636 yyerror("error setting hostid %08x", $3);
637 YYERROR;
638 }
639 }
640 | SET BLOCKPOLICY DROP {
641 if (pf->opts & PF_OPT_VERBOSE)
642 printf("set block-policy drop\n");
643 if (check_rulestate(PFCTL_STATE_OPTION))
644 YYERROR;
645 blockpolicy = PFRULE_DROP;
646 }
647 | SET BLOCKPOLICY RETURN {
648 if (pf->opts & PF_OPT_VERBOSE)
649 printf("set block-policy return\n");
650 if (check_rulestate(PFCTL_STATE_OPTION))
651 YYERROR;
652 blockpolicy = PFRULE_RETURN;
653 }
654 | SET FAILPOLICY DROP {
655 if (pf->opts & PF_OPT_VERBOSE)
656 printf("set fail-policy drop\n");
657 if (check_rulestate(PFCTL_STATE_OPTION))
658 YYERROR;
659 failpolicy = PFRULE_DROP;
660 }
661 | SET FAILPOLICY RETURN {
662 if (pf->opts & PF_OPT_VERBOSE)
663 printf("set fail-policy return\n");
664 if (check_rulestate(PFCTL_STATE_OPTION))
665 YYERROR;
666 failpolicy = PFRULE_RETURN;
667 }
668 | SET REQUIREORDER yesno {
669 if (pf->opts & PF_OPT_VERBOSE)
670 printf("set require-order %s\n",
671 $3 == 1 ? "yes" : "no");
672 require_order = $3;
673 }
674 | SET FINGERPRINTS STRING {
675 if (pf->opts & PF_OPT_VERBOSE)
676 printf("set fingerprints \"%s\"\n", $3);
677 if (check_rulestate(PFCTL_STATE_OPTION)) {
678 free($3);
679 YYERROR;
680 }
681 if (!pf->anchor->name[0]) {
682 if (pfctl_file_fingerprints(pf->dev,
683 pf->opts, $3)) {
684 yyerror("error loading "
685 "fingerprints %s", $3);
686 free($3);
687 YYERROR;
688 }
689 }
690 free($3);
691 }
692 | SET STATEPOLICY statelock {
693 if (pf->opts & PF_OPT_VERBOSE)
694 switch ($3) {
695 case 0:
696 printf("set state-policy floating\n");
697 break;
698 case PFRULE_IFBOUND:
699 printf("set state-policy if-bound\n");
700 break;
701 }
702 default_statelock = $3;
703 }
704 | SET DEBUG STRING {
705 if (check_rulestate(PFCTL_STATE_OPTION)) {
706 free($3);
707 YYERROR;
708 }
709 if (pfctl_set_debug(pf, $3) != 0) {
710 yyerror("error setting debuglevel %s", $3);
711 free($3);
712 YYERROR;
713 }
714 free($3);
715 }
716 | SET SKIP interface {
717 if (expand_skip_interface($3) != 0) {
718 yyerror("error setting skip interface(s)");
719 YYERROR;
720 }
721 }
722 | SET STATEDEFAULTS state_opt_list {
723 if (keep_state_defaults != NULL) {
724 yyerror("cannot redefine state-defaults");
725 YYERROR;
726 }
727 keep_state_defaults = $3;
728 }
729 | SET KEEPCOUNTERS {
730 pf->keep_counters = true;
731 }
732 | SET SYNCOOKIES syncookie_val syncookie_opts {
733 if (pfctl_cfg_syncookies(pf, $3, $4)) {
734 yyerror("error setting syncookies");
735 YYERROR;
736 }
737 }
738 ;
739
740 syncookie_val : STRING {
741 if (!strcmp($1, "never"))
742 $$ = PFCTL_SYNCOOKIES_NEVER;
743 else if (!strcmp($1, "adaptive"))
744 $$ = PFCTL_SYNCOOKIES_ADAPTIVE;
745 else if (!strcmp($1, "always"))
746 $$ = PFCTL_SYNCOOKIES_ALWAYS;
747 else {
748 yyerror("illegal value for syncookies");
749 YYERROR;
750 }
751 }
752 ;
753 syncookie_opts : /* empty */ { $$ = NULL; }
754 | {
755 memset(&syncookie_opts, 0, sizeof(syncookie_opts));
756 } '(' syncookie_opt_l ')' { $$ = &syncookie_opts; }
757 ;
758
759 syncookie_opt_l : syncookie_opt_l comma syncookie_opt
760 | syncookie_opt
761 ;
762
763 syncookie_opt : STRING STRING {
764 double val;
765 char *cp;
766
767 val = strtod($2, &cp);
768 if (cp == NULL || strcmp(cp, "%"))
769 YYERROR;
770 if (val <= 0 || val > 100) {
771 yyerror("illegal percentage value");
772 YYERROR;
773 }
774 if (!strcmp($1, "start")) {
775 syncookie_opts.hi = val;
776 } else if (!strcmp($1, "end")) {
777 syncookie_opts.lo = val;
778 } else {
779 yyerror("illegal syncookie option");
780 YYERROR;
781 }
782 }
783 ;
784
785 stringall : STRING { $$ = $1; }
786 | ALL {
787 if (($$ = strdup("all")) == NULL) {
788 err(1, "stringall: strdup");
789 }
790 }
791 ;
792
793 string : STRING string {
794 if (asprintf(&$$, "%s %s", $1, $2) == -1)
795 err(1, "string: asprintf");
796 free($1);
797 free($2);
798 }
799 | STRING
800 ;
801
802 varstring : numberstring varstring {
803 if (asprintf(&$$, "%s %s", $1, $2) == -1)
804 err(1, "string: asprintf");
805 free($1);
806 free($2);
807 }
808 | numberstring
809 ;
810
811 numberstring : NUMBER {
812 char *s;
813 if (asprintf(&s, "%lld", (long long)$1) == -1) {
814 yyerror("string: asprintf");
815 YYERROR;
816 }
817 $$ = s;
818 }
819 | STRING
820 ;
821
822 varset : STRING '=' varstring {
823 char *s = $1;
824 if (pf->opts & PF_OPT_VERBOSE)
825 printf("%s = \"%s\"\n", $1, $3);
826 while (*s++) {
827 if (isspace((unsigned char)*s)) {
828 yyerror("macro name cannot contain "
829 "whitespace");
830 YYERROR;
831 }
832 }
833 if (symset($1, $3, 0) == -1)
834 err(1, "cannot store variable %s", $1);
835 free($1);
836 free($3);
837 }
838 ;
839
840 anchorname : STRING { $$ = $1; }
841 | /* empty */ { $$ = NULL; }
842 ;
843
844 pfa_anchorlist : /* empty */
845 | pfa_anchorlist '\n'
846 | pfa_anchorlist pfrule '\n'
847 | pfa_anchorlist anchorrule '\n'
848 ;
849
850 pfa_anchor : '{'
851 {
852 char ta[PF_ANCHOR_NAME_SIZE];
853 struct pfctl_ruleset *rs;
854
855 /* steping into a brace anchor */
856 pf->asd++;
857 pf->bn++;
858
859 /* create a holding ruleset in the root */
860 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
861 rs = pf_find_or_create_ruleset(ta);
862 if (rs == NULL)
863 err(1, "pfa_anchor: pf_find_or_create_ruleset");
864 pf->astack[pf->asd] = rs->anchor;
865 pf->anchor = rs->anchor;
866 } '\n' pfa_anchorlist '}'
867 {
868 pf->alast = pf->anchor;
869 pf->asd--;
870 pf->anchor = pf->astack[pf->asd];
871 }
872 | /* empty */
873 ;
874
875 anchorrule : ANCHOR anchorname dir quick interface af proto fromto
876 filter_opts pfa_anchor
877 {
878 struct pfctl_rule r;
879 struct node_proto *proto;
880
881 if (check_rulestate(PFCTL_STATE_FILTER)) {
882 if ($2)
883 free($2);
884 YYERROR;
885 }
886
887 if ($2 && ($2[0] == '_' || strstr($2, "/_") != NULL)) {
888 free($2);
889 yyerror("anchor names beginning with '_' "
890 "are reserved for internal use");
891 YYERROR;
892 }
893
894 memset(&r, 0, sizeof(r));
895 if (pf->astack[pf->asd + 1]) {
896 /* move inline rules into relative location */
897 pfctl_anchor_setup(&r,
898 &pf->astack[pf->asd]->ruleset,
899 $2 ? $2 : pf->alast->name);
900
901 if (r.anchor == NULL)
902 err(1, "anchorrule: unable to "
903 "create ruleset");
904
905 if (pf->alast != r.anchor) {
906 if (r.anchor->match) {
907 yyerror("inline anchor '%s' "
908 "already exists",
909 r.anchor->name);
910 YYERROR;
911 }
912 mv_rules(&pf->alast->ruleset,
913 &r.anchor->ruleset);
914 }
915 pf_remove_if_empty_ruleset(&pf->alast->ruleset);
916 pf->alast = r.anchor;
917 } else {
918 if (!$2) {
919 yyerror("anchors without explicit "
920 "rules must specify a name");
921 YYERROR;
922 }
923 }
924 r.direction = $3;
925 r.quick = $4.quick;
926 r.af = $6;
927 r.prob = $9.prob;
928 r.rtableid = $9.rtableid;
929 r.ridentifier = $9.ridentifier;
930
931 if ($9.tag)
932 if (strlcpy(r.tagname, $9.tag,
933 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
934 yyerror("tag too long, max %u chars",
935 PF_TAG_NAME_SIZE - 1);
936 YYERROR;
937 }
938 if ($9.match_tag)
939 if (strlcpy(r.match_tagname, $9.match_tag,
940 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
941 yyerror("tag too long, max %u chars",
942 PF_TAG_NAME_SIZE - 1);
943 YYERROR;
944 }
945 r.match_tag_not = $9.match_tag_not;
946 if (rule_label(&r, $9.label))
947 YYERROR;
948 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
949 free($9.label[i]);
950 r.flags = $9.flags.b1;
951 r.flagset = $9.flags.b2;
952 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
953 yyerror("flags always false");
954 YYERROR;
955 }
956 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
957 for (proto = $7; proto != NULL &&
958 proto->proto != IPPROTO_TCP;
959 proto = proto->next)
960 ; /* nothing */
961 if (proto == NULL && $7 != NULL) {
962 if ($9.flags.b1 || $9.flags.b2)
963 yyerror(
964 "flags only apply to tcp");
965 if ($8.src_os)
966 yyerror(
967 "OS fingerprinting only "
968 "applies to tcp");
969 YYERROR;
970 }
971 }
972
973 r.tos = $9.tos;
974
975 if ($9.keep.action) {
976 yyerror("cannot specify state handling "
977 "on anchors");
978 YYERROR;
979 }
980
981 if ($9.match_tag)
982 if (strlcpy(r.match_tagname, $9.match_tag,
983 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
984 yyerror("tag too long, max %u chars",
985 PF_TAG_NAME_SIZE - 1);
986 YYERROR;
987 }
988 r.match_tag_not = $9.match_tag_not;
989 if ($9.marker & FOM_PRIO) {
990 if ($9.prio == 0)
991 r.prio = PF_PRIO_ZERO;
992 else
993 r.prio = $9.prio;
994 }
995 if ($9.marker & FOM_SETPRIO) {
996 r.set_prio[0] = $9.set_prio[0];
997 r.set_prio[1] = $9.set_prio[1];
998 r.scrub_flags |= PFSTATE_SETPRIO;
999 }
1000
1001 decide_address_family($8.src.host, &r.af);
1002 decide_address_family($8.dst.host, &r.af);
1003
1004 expand_rule(&r, $5, NULL, $7, $8.src_os,
1005 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
1006 $9.uid, $9.gid, $9.icmpspec,
1007 pf->astack[pf->asd + 1] ? pf->alast->name : $2);
1008 free($2);
1009 pf->astack[pf->asd + 1] = NULL;
1010 }
1011 | NATANCHOR string interface af proto fromto rtable {
1012 struct pfctl_rule r;
1013
1014 if (check_rulestate(PFCTL_STATE_NAT)) {
1015 free($2);
1016 YYERROR;
1017 }
1018
1019 memset(&r, 0, sizeof(r));
1020 r.action = PF_NAT;
1021 r.af = $4;
1022 r.rtableid = $7;
1023
1024 decide_address_family($6.src.host, &r.af);
1025 decide_address_family($6.dst.host, &r.af);
1026
1027 expand_rule(&r, $3, NULL, $5, $6.src_os,
1028 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
1029 0, 0, 0, $2);
1030 free($2);
1031 }
1032 | RDRANCHOR string interface af proto fromto rtable {
1033 struct pfctl_rule r;
1034
1035 if (check_rulestate(PFCTL_STATE_NAT)) {
1036 free($2);
1037 YYERROR;
1038 }
1039
1040 memset(&r, 0, sizeof(r));
1041 r.action = PF_RDR;
1042 r.af = $4;
1043 r.rtableid = $7;
1044
1045 decide_address_family($6.src.host, &r.af);
1046 decide_address_family($6.dst.host, &r.af);
1047
1048 if ($6.src.port != NULL) {
1049 yyerror("source port parameter not supported"
1050 " in rdr-anchor");
1051 YYERROR;
1052 }
1053 if ($6.dst.port != NULL) {
1054 if ($6.dst.port->next != NULL) {
1055 yyerror("destination port list "
1056 "expansion not supported in "
1057 "rdr-anchor");
1058 YYERROR;
1059 } else if ($6.dst.port->op != PF_OP_EQ) {
1060 yyerror("destination port operators"
1061 " not supported in rdr-anchor");
1062 YYERROR;
1063 }
1064 r.dst.port[0] = $6.dst.port->port[0];
1065 r.dst.port[1] = $6.dst.port->port[1];
1066 r.dst.port_op = $6.dst.port->op;
1067 }
1068
1069 expand_rule(&r, $3, NULL, $5, $6.src_os,
1070 $6.src.host, $6.src.port, $6.dst.host, $6.dst.port,
1071 0, 0, 0, $2);
1072 free($2);
1073 }
1074 | BINATANCHOR string interface af proto fromto rtable {
1075 struct pfctl_rule r;
1076
1077 if (check_rulestate(PFCTL_STATE_NAT)) {
1078 free($2);
1079 YYERROR;
1080 }
1081
1082 memset(&r, 0, sizeof(r));
1083 r.action = PF_BINAT;
1084 r.af = $4;
1085 r.rtableid = $7;
1086 if ($5 != NULL) {
1087 if ($5->next != NULL) {
1088 yyerror("proto list expansion"
1089 " not supported in binat-anchor");
1090 YYERROR;
1091 }
1092 r.proto = $5->proto;
1093 free($5);
1094 }
1095
1096 if ($6.src.host != NULL || $6.src.port != NULL ||
1097 $6.dst.host != NULL || $6.dst.port != NULL) {
1098 yyerror("fromto parameter not supported"
1099 " in binat-anchor");
1100 YYERROR;
1101 }
1102
1103 decide_address_family($6.src.host, &r.af);
1104 decide_address_family($6.dst.host, &r.af);
1105
1106 pfctl_append_rule(pf, &r, $2);
1107 free($2);
1108 }
1109 ;
1110
1111 loadrule : LOAD ANCHOR string FROM string {
1112 struct loadanchors *loadanchor;
1113
1114 if (strlen(pf->anchor->name) + 1 +
1115 strlen($3) >= MAXPATHLEN) {
1116 yyerror("anchorname %s too long, max %u\n",
1117 $3, MAXPATHLEN - 1);
1118 free($3);
1119 YYERROR;
1120 }
1121 loadanchor = calloc(1, sizeof(struct loadanchors));
1122 if (loadanchor == NULL)
1123 err(1, "loadrule: calloc");
1124 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1125 NULL)
1126 err(1, "loadrule: malloc");
1127 if (pf->anchor->name[0])
1128 snprintf(loadanchor->anchorname, MAXPATHLEN,
1129 "%s/%s", pf->anchor->name, $3);
1130 else
1131 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1132 if ((loadanchor->filename = strdup($5)) == NULL)
1133 err(1, "loadrule: strdup");
1134
1135 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1136 entries);
1137
1138 free($3);
1139 free($5);
1140 };
1141
1142 scrubaction : no SCRUB {
1143 $$.b2 = $$.w = 0;
1144 if ($1)
1145 $$.b1 = PF_NOSCRUB;
1146 else
1147 $$.b1 = PF_SCRUB;
1148 }
1149 ;
1150
1151 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts
1152 {
1153 struct pfctl_rule r;
1154
1155 if (check_rulestate(PFCTL_STATE_SCRUB))
1156 YYERROR;
1157
1158 memset(&r, 0, sizeof(r));
1159
1160 r.action = $1.b1;
1161 r.direction = $2;
1162
1163 r.log = $3.log;
1164 r.logif = $3.logif;
1165 if ($3.quick) {
1166 yyerror("scrub rules do not support 'quick'");
1167 YYERROR;
1168 }
1169
1170 r.af = $5;
1171 if ($8.nodf)
1172 r.rule_flag |= PFRULE_NODF;
1173 if ($8.randomid)
1174 r.rule_flag |= PFRULE_RANDOMID;
1175 if ($8.reassemble_tcp) {
1176 if (r.direction != PF_INOUT) {
1177 yyerror("reassemble tcp rules can not "
1178 "specify direction");
1179 YYERROR;
1180 }
1181 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1182 }
1183 if ($8.minttl)
1184 r.min_ttl = $8.minttl;
1185 if ($8.maxmss)
1186 r.max_mss = $8.maxmss;
1187 if ($8.marker & SOM_SETTOS) {
1188 r.rule_flag |= PFRULE_SET_TOS;
1189 r.set_tos = $8.settos;
1190 }
1191 if ($8.fragcache)
1192 r.rule_flag |= $8.fragcache;
1193 if ($8.match_tag)
1194 if (strlcpy(r.match_tagname, $8.match_tag,
1195 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1196 yyerror("tag too long, max %u chars",
1197 PF_TAG_NAME_SIZE - 1);
1198 YYERROR;
1199 }
1200 r.match_tag_not = $8.match_tag_not;
1201 r.rtableid = $8.rtableid;
1202
1203 expand_rule(&r, $4, NULL, $6, $7.src_os,
1204 $7.src.host, $7.src.port, $7.dst.host, $7.dst.port,
1205 NULL, NULL, NULL, "");
1206 }
1207 ;
1208
1209 scrub_opts : {
1210 bzero(&scrub_opts, sizeof scrub_opts);
1211 scrub_opts.rtableid = -1;
1212 }
1213 scrub_opts_l
1214 { $$ = scrub_opts; }
1215 | /* empty */ {
1216 bzero(&scrub_opts, sizeof scrub_opts);
1217 scrub_opts.rtableid = -1;
1218 $$ = scrub_opts;
1219 }
1220 ;
1221
1222 scrub_opts_l : scrub_opts_l scrub_opt
1223 | scrub_opt
1224 ;
1225
1226 scrub_opt : NODF {
1227 if (scrub_opts.nodf) {
1228 yyerror("no-df cannot be respecified");
1229 YYERROR;
1230 }
1231 scrub_opts.nodf = 1;
1232 }
1233 | MINTTL NUMBER {
1234 if (scrub_opts.marker & SOM_MINTTL) {
1235 yyerror("min-ttl cannot be respecified");
1236 YYERROR;
1237 }
1238 if ($2 < 0 || $2 > 255) {
1239 yyerror("illegal min-ttl value %d", $2);
1240 YYERROR;
1241 }
1242 scrub_opts.marker |= SOM_MINTTL;
1243 scrub_opts.minttl = $2;
1244 }
1245 | MAXMSS NUMBER {
1246 if (scrub_opts.marker & SOM_MAXMSS) {
1247 yyerror("max-mss cannot be respecified");
1248 YYERROR;
1249 }
1250 if ($2 < 0 || $2 > 65535) {
1251 yyerror("illegal max-mss value %d", $2);
1252 YYERROR;
1253 }
1254 scrub_opts.marker |= SOM_MAXMSS;
1255 scrub_opts.maxmss = $2;
1256 }
1257 | SETTOS tos {
1258 if (scrub_opts.marker & SOM_SETTOS) {
1259 yyerror("set-tos cannot be respecified");
1260 YYERROR;
1261 }
1262 scrub_opts.marker |= SOM_SETTOS;
1263 scrub_opts.settos = $2;
1264 }
1265 | fragcache {
1266 if (scrub_opts.marker & SOM_FRAGCACHE) {
1267 yyerror("fragcache cannot be respecified");
1268 YYERROR;
1269 }
1270 scrub_opts.marker |= SOM_FRAGCACHE;
1271 scrub_opts.fragcache = $1;
1272 }
1273 | REASSEMBLE STRING {
1274 if (strcasecmp($2, "tcp") != 0) {
1275 yyerror("scrub reassemble supports only tcp, "
1276 "not '%s'", $2);
1277 free($2);
1278 YYERROR;
1279 }
1280 free($2);
1281 if (scrub_opts.reassemble_tcp) {
1282 yyerror("reassemble tcp cannot be respecified");
1283 YYERROR;
1284 }
1285 scrub_opts.reassemble_tcp = 1;
1286 }
1287 | RANDOMID {
1288 if (scrub_opts.randomid) {
1289 yyerror("random-id cannot be respecified");
1290 YYERROR;
1291 }
1292 scrub_opts.randomid = 1;
1293 }
1294 | RTABLE NUMBER {
1295 if ($2 < 0 || $2 > rt_tableid_max()) {
1296 yyerror("invalid rtable id");
1297 YYERROR;
1298 }
1299 scrub_opts.rtableid = $2;
1300 }
1301 | not TAGGED string {
1302 scrub_opts.match_tag = $3;
1303 scrub_opts.match_tag_not = $1;
1304 }
1305 ;
1306
1307 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ }
1308 | FRAGMENT FRAGCROP { $$ = 0; }
1309 | FRAGMENT FRAGDROP { $$ = 0; }
1310 ;
1311
1312 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1313 struct pfctl_rule r;
1314 struct node_host *h = NULL, *hh;
1315 struct node_if *i, *j;
1316
1317 if (check_rulestate(PFCTL_STATE_FILTER))
1318 YYERROR;
1319
1320 for (i = $3; i; i = i->next) {
1321 bzero(&r, sizeof(r));
1322
1323 r.action = PF_DROP;
1324 r.direction = PF_IN;
1325 r.log = $2.log;
1326 r.logif = $2.logif;
1327 r.quick = $2.quick;
1328 r.af = $4;
1329 r.ridentifier = $5.ridentifier;
1330 if (rule_label(&r, $5.label))
1331 YYERROR;
1332 r.rtableid = $5.rtableid;
1333 j = calloc(1, sizeof(struct node_if));
1334 if (j == NULL)
1335 err(1, "antispoof: calloc");
1336 if (strlcpy(j->ifname, i->ifname,
1337 sizeof(j->ifname)) >= sizeof(j->ifname)) {
1338 free(j);
1339 yyerror("interface name too long");
1340 YYERROR;
1341 }
1342 j->not = 1;
1343 if (i->dynamic) {
1344 h = calloc(1, sizeof(*h));
1345 if (h == NULL)
1346 err(1, "address: calloc");
1347 h->addr.type = PF_ADDR_DYNIFTL;
1348 set_ipmask(h, 128);
1349 if (strlcpy(h->addr.v.ifname, i->ifname,
1350 sizeof(h->addr.v.ifname)) >=
1351 sizeof(h->addr.v.ifname)) {
1352 free(h);
1353 yyerror(
1354 "interface name too long");
1355 YYERROR;
1356 }
1357 hh = malloc(sizeof(*hh));
1358 if (hh == NULL)
1359 err(1, "address: malloc");
1360 bcopy(h, hh, sizeof(*hh));
1361 h->addr.iflags = PFI_AFLAG_NETWORK;
1362 } else {
1363 h = ifa_lookup(j->ifname,
1364 PFI_AFLAG_NETWORK);
1365 hh = NULL;
1366 }
1367
1368 if (h != NULL)
1369 expand_rule(&r, j, NULL, NULL, NULL, h,
1370 NULL, NULL, NULL, NULL, NULL,
1371 NULL, "");
1372
1373 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1374 bzero(&r, sizeof(r));
1375
1376 r.action = PF_DROP;
1377 r.direction = PF_IN;
1378 r.log = $2.log;
1379 r.logif = $2.logif;
1380 r.quick = $2.quick;
1381 r.af = $4;
1382 r.ridentifier = $5.ridentifier;
1383 if (rule_label(&r, $5.label))
1384 YYERROR;
1385 r.rtableid = $5.rtableid;
1386 if (hh != NULL)
1387 h = hh;
1388 else
1389 h = ifa_lookup(i->ifname, 0);
1390 if (h != NULL)
1391 expand_rule(&r, NULL, NULL,
1392 NULL, NULL, h, NULL, NULL,
1393 NULL, NULL, NULL, NULL, "");
1394 } else
1395 free(hh);
1396 }
1397 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
1398 free($5.label[i]);
1399 }
1400 ;
1401
1402 antispoof_ifspc : FOR antispoof_if { $$ = $2; }
1403 | FOR '{' optnl antispoof_iflst '}' { $$ = $4; }
1404 ;
1405
1406 antispoof_iflst : antispoof_if optnl { $$ = $1; }
1407 | antispoof_iflst comma antispoof_if optnl {
1408 $1->tail->next = $3;
1409 $1->tail = $3;
1410 $$ = $1;
1411 }
1412 ;
1413
1414 antispoof_if : if_item { $$ = $1; }
1415 | '(' if_item ')' {
1416 $2->dynamic = 1;
1417 $$ = $2;
1418 }
1419 ;
1420
1421 antispoof_opts : {
1422 bzero(&antispoof_opts, sizeof antispoof_opts);
1423 antispoof_opts.rtableid = -1;
1424 }
1425 antispoof_opts_l
1426 { $$ = antispoof_opts; }
1427 | /* empty */ {
1428 bzero(&antispoof_opts, sizeof antispoof_opts);
1429 antispoof_opts.rtableid = -1;
1430 $$ = antispoof_opts;
1431 }
1432 ;
1433
1434 antispoof_opts_l : antispoof_opts_l antispoof_opt
1435 | antispoof_opt
1436 ;
1437
1438 antispoof_opt : label {
1439 if (antispoof_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
1440 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
1441 YYERROR;
1442 }
1443 antispoof_opts.label[antispoof_opts.labelcount++] = $1;
1444 }
1445 | RIDENTIFIER number {
1446 antispoof_opts.ridentifier = $2;
1447 }
1448 | RTABLE NUMBER {
1449 if ($2 < 0 || $2 > rt_tableid_max()) {
1450 yyerror("invalid rtable id");
1451 YYERROR;
1452 }
1453 antispoof_opts.rtableid = $2;
1454 }
1455 ;
1456
1457 not : '!' { $$ = 1; }
1458 | /* empty */ { $$ = 0; }
1459 ;
1460
1461 tabledef : TABLE '<' STRING '>' table_opts {
1462 struct node_host *h, *nh;
1463 struct node_tinit *ti, *nti;
1464
1465 if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1466 yyerror("table name too long, max %d chars",
1467 PF_TABLE_NAME_SIZE - 1);
1468 free($3);
1469 YYERROR;
1470 }
1471 if (pf->loadopt & PFCTL_FLAG_TABLE)
1472 if (process_tabledef($3, &$5)) {
1473 free($3);
1474 YYERROR;
1475 }
1476 free($3);
1477 for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1478 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1479 if (ti->file)
1480 free(ti->file);
1481 for (h = ti->host; h != NULL; h = nh) {
1482 nh = h->next;
1483 free(h);
1484 }
1485 nti = SIMPLEQ_NEXT(ti, entries);
1486 free(ti);
1487 }
1488 }
1489 ;
1490
1491 table_opts : {
1492 bzero(&table_opts, sizeof table_opts);
1493 SIMPLEQ_INIT(&table_opts.init_nodes);
1494 }
1495 table_opts_l
1496 { $$ = table_opts; }
1497 | /* empty */
1498 {
1499 bzero(&table_opts, sizeof table_opts);
1500 SIMPLEQ_INIT(&table_opts.init_nodes);
1501 $$ = table_opts;
1502 }
1503 ;
1504
1505 table_opts_l : table_opts_l table_opt
1506 | table_opt
1507 ;
1508
1509 table_opt : STRING {
1510 if (!strcmp($1, "const"))
1511 table_opts.flags |= PFR_TFLAG_CONST;
1512 else if (!strcmp($1, "persist"))
1513 table_opts.flags |= PFR_TFLAG_PERSIST;
1514 else if (!strcmp($1, "counters"))
1515 table_opts.flags |= PFR_TFLAG_COUNTERS;
1516 else {
1517 yyerror("invalid table option '%s'", $1);
1518 free($1);
1519 YYERROR;
1520 }
1521 free($1);
1522 }
1523 | '{' optnl '}' { table_opts.init_addr = 1; }
1524 | '{' optnl host_list '}' {
1525 struct node_host *n;
1526 struct node_tinit *ti;
1527
1528 for (n = $3; n != NULL; n = n->next) {
1529 switch (n->addr.type) {
1530 case PF_ADDR_ADDRMASK:
1531 continue; /* ok */
1532 case PF_ADDR_RANGE:
1533 yyerror("address ranges are not "
1534 "permitted inside tables");
1535 break;
1536 case PF_ADDR_DYNIFTL:
1537 yyerror("dynamic addresses are not "
1538 "permitted inside tables");
1539 break;
1540 case PF_ADDR_TABLE:
1541 yyerror("tables cannot contain tables");
1542 break;
1543 case PF_ADDR_NOROUTE:
1544 yyerror("\"no-route\" is not permitted "
1545 "inside tables");
1546 break;
1547 case PF_ADDR_URPFFAILED:
1548 yyerror("\"urpf-failed\" is not "
1549 "permitted inside tables");
1550 break;
1551 default:
1552 yyerror("unknown address type %d",
1553 n->addr.type);
1554 }
1555 YYERROR;
1556 }
1557 if (!(ti = calloc(1, sizeof(*ti))))
1558 err(1, "table_opt: calloc");
1559 ti->host = $3;
1560 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1561 entries);
1562 table_opts.init_addr = 1;
1563 }
1564 | FILENAME STRING {
1565 struct node_tinit *ti;
1566
1567 if (!(ti = calloc(1, sizeof(*ti))))
1568 err(1, "table_opt: calloc");
1569 ti->file = $2;
1570 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1571 entries);
1572 table_opts.init_addr = 1;
1573 }
1574 ;
1575
1576 altqif : ALTQ interface queue_opts QUEUE qassign {
1577 struct pf_altq a;
1578
1579 if (check_rulestate(PFCTL_STATE_QUEUE))
1580 YYERROR;
1581
1582 memset(&a, 0, sizeof(a));
1583 if ($3.scheduler.qtype == ALTQT_NONE) {
1584 yyerror("no scheduler specified!");
1585 YYERROR;
1586 }
1587 a.scheduler = $3.scheduler.qtype;
1588 a.qlimit = $3.qlimit;
1589 a.tbrsize = $3.tbrsize;
1590 if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) {
1591 yyerror("no child queues specified");
1592 YYERROR;
1593 }
1594 if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1595 &$3.scheduler))
1596 YYERROR;
1597 }
1598 ;
1599
1600 queuespec : QUEUE STRING interface queue_opts qassign {
1601 struct pf_altq a;
1602
1603 if (check_rulestate(PFCTL_STATE_QUEUE)) {
1604 free($2);
1605 YYERROR;
1606 }
1607
1608 memset(&a, 0, sizeof(a));
1609
1610 if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1611 sizeof(a.qname)) {
1612 yyerror("queue name too long (max "
1613 "%d chars)", PF_QNAME_SIZE-1);
1614 free($2);
1615 YYERROR;
1616 }
1617 free($2);
1618 if ($4.tbrsize) {
1619 yyerror("cannot specify tbrsize for queue");
1620 YYERROR;
1621 }
1622 if ($4.priority > 255) {
1623 yyerror("priority out of range: max 255");
1624 YYERROR;
1625 }
1626 a.priority = $4.priority;
1627 a.qlimit = $4.qlimit;
1628 a.scheduler = $4.scheduler.qtype;
1629 if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1630 &$4.scheduler)) {
1631 yyerror("errors in queue definition");
1632 YYERROR;
1633 }
1634 }
1635 ;
1636
1637 queue_opts : {
1638 bzero(&queue_opts, sizeof queue_opts);
1639 queue_opts.priority = DEFAULT_PRIORITY;
1640 queue_opts.qlimit = DEFAULT_QLIMIT;
1641 queue_opts.scheduler.qtype = ALTQT_NONE;
1642 queue_opts.queue_bwspec.bw_percent = 100;
1643 }
1644 queue_opts_l
1645 { $$ = queue_opts; }
1646 | /* empty */ {
1647 bzero(&queue_opts, sizeof queue_opts);
1648 queue_opts.priority = DEFAULT_PRIORITY;
1649 queue_opts.qlimit = DEFAULT_QLIMIT;
1650 queue_opts.scheduler.qtype = ALTQT_NONE;
1651 queue_opts.queue_bwspec.bw_percent = 100;
1652 $$ = queue_opts;
1653 }
1654 ;
1655
1656 queue_opts_l : queue_opts_l queue_opt
1657 | queue_opt
1658 ;
1659
1660 queue_opt : BANDWIDTH bandwidth {
1661 if (queue_opts.marker & QOM_BWSPEC) {
1662 yyerror("bandwidth cannot be respecified");
1663 YYERROR;
1664 }
1665 queue_opts.marker |= QOM_BWSPEC;
1666 queue_opts.queue_bwspec = $2;
1667 }
1668 | PRIORITY NUMBER {
1669 if (queue_opts.marker & QOM_PRIORITY) {
1670 yyerror("priority cannot be respecified");
1671 YYERROR;
1672 }
1673 if ($2 < 0 || $2 > 255) {
1674 yyerror("priority out of range: max 255");
1675 YYERROR;
1676 }
1677 queue_opts.marker |= QOM_PRIORITY;
1678 queue_opts.priority = $2;
1679 }
1680 | QLIMIT NUMBER {
1681 if (queue_opts.marker & QOM_QLIMIT) {
1682 yyerror("qlimit cannot be respecified");
1683 YYERROR;
1684 }
1685 if ($2 < 0 || $2 > 65535) {
1686 yyerror("qlimit out of range: max 65535");
1687 YYERROR;
1688 }
1689 queue_opts.marker |= QOM_QLIMIT;
1690 queue_opts.qlimit = $2;
1691 }
1692 | scheduler {
1693 if (queue_opts.marker & QOM_SCHEDULER) {
1694 yyerror("scheduler cannot be respecified");
1695 YYERROR;
1696 }
1697 queue_opts.marker |= QOM_SCHEDULER;
1698 queue_opts.scheduler = $1;
1699 }
1700 | TBRSIZE NUMBER {
1701 if (queue_opts.marker & QOM_TBRSIZE) {
1702 yyerror("tbrsize cannot be respecified");
1703 YYERROR;
1704 }
1705 if ($2 < 0 || $2 > UINT_MAX) {
1706 yyerror("tbrsize too big: max %u", UINT_MAX);
1707 YYERROR;
1708 }
1709 queue_opts.marker |= QOM_TBRSIZE;
1710 queue_opts.tbrsize = $2;
1711 }
1712 ;
1713
1714 bandwidth : STRING {
1715 double bps;
1716 char *cp;
1717
1718 $$.bw_percent = 0;
1719
1720 bps = strtod($1, &cp);
1721 if (cp != NULL) {
1722 if (strlen(cp) > 1) {
1723 char *cu = cp + 1;
1724 if (!strcmp(cu, "Bit") ||
1725 !strcmp(cu, "B") ||
1726 !strcmp(cu, "bit") ||
1727 !strcmp(cu, "b")) {
1728 *cu = 0;
1729 }
1730 }
1731 if (!strcmp(cp, "b"))
1732 ; /* nothing */
1733 else if (!strcmp(cp, "K"))
1734 bps *= 1000;
1735 else if (!strcmp(cp, "M"))
1736 bps *= 1000 * 1000;
1737 else if (!strcmp(cp, "G"))
1738 bps *= 1000 * 1000 * 1000;
1739 else if (!strcmp(cp, "%")) {
1740 if (bps < 0 || bps > 100) {
1741 yyerror("bandwidth spec "
1742 "out of range");
1743 free($1);
1744 YYERROR;
1745 }
1746 $$.bw_percent = bps;
1747 bps = 0;
1748 } else {
1749 yyerror("unknown unit %s", cp);
1750 free($1);
1751 YYERROR;
1752 }
1753 }
1754 free($1);
1755 $$.bw_absolute = (u_int64_t)bps;
1756 }
1757 | NUMBER {
1758 if ($1 < 0 || $1 >= LLONG_MAX) {
1759 yyerror("bandwidth number too big");
1760 YYERROR;
1761 }
1762 $$.bw_percent = 0;
1763 $$.bw_absolute = $1;
1764 }
1765 ;
1766
1767 scheduler : CBQ {
1768 $$.qtype = ALTQT_CBQ;
1769 $$.data.cbq_opts.flags = 0;
1770 }
1771 | CBQ '(' cbqflags_list ')' {
1772 $$.qtype = ALTQT_CBQ;
1773 $$.data.cbq_opts.flags = $3;
1774 }
1775 | PRIQ {
1776 $$.qtype = ALTQT_PRIQ;
1777 $$.data.priq_opts.flags = 0;
1778 }
1779 | PRIQ '(' priqflags_list ')' {
1780 $$.qtype = ALTQT_PRIQ;
1781 $$.data.priq_opts.flags = $3;
1782 }
1783 | HFSC {
1784 $$.qtype = ALTQT_HFSC;
1785 bzero(&$$.data.hfsc_opts,
1786 sizeof(struct node_hfsc_opts));
1787 }
1788 | HFSC '(' hfsc_opts ')' {
1789 $$.qtype = ALTQT_HFSC;
1790 $$.data.hfsc_opts = $3;
1791 }
1792 | FAIRQ {
1793 $$.qtype = ALTQT_FAIRQ;
1794 bzero(&$$.data.fairq_opts,
1795 sizeof(struct node_fairq_opts));
1796 }
1797 | FAIRQ '(' fairq_opts ')' {
1798 $$.qtype = ALTQT_FAIRQ;
1799 $$.data.fairq_opts = $3;
1800 }
1801 | CODEL {
1802 $$.qtype = ALTQT_CODEL;
1803 bzero(&$$.data.codel_opts,
1804 sizeof(struct codel_opts));
1805 }
1806 | CODEL '(' codel_opts ')' {
1807 $$.qtype = ALTQT_CODEL;
1808 $$.data.codel_opts = $3;
1809 }
1810 ;
1811
1812 cbqflags_list : cbqflags_item { $$ |= $1; }
1813 | cbqflags_list comma cbqflags_item { $$ |= $3; }
1814 ;
1815
1816 cbqflags_item : STRING {
1817 if (!strcmp($1, "default"))
1818 $$ = CBQCLF_DEFCLASS;
1819 else if (!strcmp($1, "borrow"))
1820 $$ = CBQCLF_BORROW;
1821 else if (!strcmp($1, "red"))
1822 $$ = CBQCLF_RED;
1823 else if (!strcmp($1, "ecn"))
1824 $$ = CBQCLF_RED|CBQCLF_ECN;
1825 else if (!strcmp($1, "rio"))
1826 $$ = CBQCLF_RIO;
1827 else if (!strcmp($1, "codel"))
1828 $$ = CBQCLF_CODEL;
1829 else {
1830 yyerror("unknown cbq flag \"%s\"", $1);
1831 free($1);
1832 YYERROR;
1833 }
1834 free($1);
1835 }
1836 ;
1837
1838 priqflags_list : priqflags_item { $$ |= $1; }
1839 | priqflags_list comma priqflags_item { $$ |= $3; }
1840 ;
1841
1842 priqflags_item : STRING {
1843 if (!strcmp($1, "default"))
1844 $$ = PRCF_DEFAULTCLASS;
1845 else if (!strcmp($1, "red"))
1846 $$ = PRCF_RED;
1847 else if (!strcmp($1, "ecn"))
1848 $$ = PRCF_RED|PRCF_ECN;
1849 else if (!strcmp($1, "rio"))
1850 $$ = PRCF_RIO;
1851 else if (!strcmp($1, "codel"))
1852 $$ = PRCF_CODEL;
1853 else {
1854 yyerror("unknown priq flag \"%s\"", $1);
1855 free($1);
1856 YYERROR;
1857 }
1858 free($1);
1859 }
1860 ;
1861
1862 hfsc_opts : {
1863 bzero(&hfsc_opts,
1864 sizeof(struct node_hfsc_opts));
1865 }
1866 hfscopts_list {
1867 $$ = hfsc_opts;
1868 }
1869 ;
1870
1871 hfscopts_list : hfscopts_item
1872 | hfscopts_list comma hfscopts_item
1873 ;
1874
1875 hfscopts_item : LINKSHARE bandwidth {
1876 if (hfsc_opts.linkshare.used) {
1877 yyerror("linkshare already specified");
1878 YYERROR;
1879 }
1880 hfsc_opts.linkshare.m2 = $2;
1881 hfsc_opts.linkshare.used = 1;
1882 }
1883 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
1884 {
1885 if ($5 < 0 || $5 > INT_MAX) {
1886 yyerror("timing in curve out of range");
1887 YYERROR;
1888 }
1889 if (hfsc_opts.linkshare.used) {
1890 yyerror("linkshare already specified");
1891 YYERROR;
1892 }
1893 hfsc_opts.linkshare.m1 = $3;
1894 hfsc_opts.linkshare.d = $5;
1895 hfsc_opts.linkshare.m2 = $7;
1896 hfsc_opts.linkshare.used = 1;
1897 }
1898 | REALTIME bandwidth {
1899 if (hfsc_opts.realtime.used) {
1900 yyerror("realtime already specified");
1901 YYERROR;
1902 }
1903 hfsc_opts.realtime.m2 = $2;
1904 hfsc_opts.realtime.used = 1;
1905 }
1906 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
1907 {
1908 if ($5 < 0 || $5 > INT_MAX) {
1909 yyerror("timing in curve out of range");
1910 YYERROR;
1911 }
1912 if (hfsc_opts.realtime.used) {
1913 yyerror("realtime already specified");
1914 YYERROR;
1915 }
1916 hfsc_opts.realtime.m1 = $3;
1917 hfsc_opts.realtime.d = $5;
1918 hfsc_opts.realtime.m2 = $7;
1919 hfsc_opts.realtime.used = 1;
1920 }
1921 | UPPERLIMIT bandwidth {
1922 if (hfsc_opts.upperlimit.used) {
1923 yyerror("upperlimit already specified");
1924 YYERROR;
1925 }
1926 hfsc_opts.upperlimit.m2 = $2;
1927 hfsc_opts.upperlimit.used = 1;
1928 }
1929 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
1930 {
1931 if ($5 < 0 || $5 > INT_MAX) {
1932 yyerror("timing in curve out of range");
1933 YYERROR;
1934 }
1935 if (hfsc_opts.upperlimit.used) {
1936 yyerror("upperlimit already specified");
1937 YYERROR;
1938 }
1939 hfsc_opts.upperlimit.m1 = $3;
1940 hfsc_opts.upperlimit.d = $5;
1941 hfsc_opts.upperlimit.m2 = $7;
1942 hfsc_opts.upperlimit.used = 1;
1943 }
1944 | STRING {
1945 if (!strcmp($1, "default"))
1946 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
1947 else if (!strcmp($1, "red"))
1948 hfsc_opts.flags |= HFCF_RED;
1949 else if (!strcmp($1, "ecn"))
1950 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
1951 else if (!strcmp($1, "rio"))
1952 hfsc_opts.flags |= HFCF_RIO;
1953 else if (!strcmp($1, "codel"))
1954 hfsc_opts.flags |= HFCF_CODEL;
1955 else {
1956 yyerror("unknown hfsc flag \"%s\"", $1);
1957 free($1);
1958 YYERROR;
1959 }
1960 free($1);
1961 }
1962 ;
1963
1964 fairq_opts : {
1965 bzero(&fairq_opts,
1966 sizeof(struct node_fairq_opts));
1967 }
1968 fairqopts_list {
1969 $$ = fairq_opts;
1970 }
1971 ;
1972
1973 fairqopts_list : fairqopts_item
1974 | fairqopts_list comma fairqopts_item
1975 ;
1976
1977 fairqopts_item : LINKSHARE bandwidth {
1978 if (fairq_opts.linkshare.used) {
1979 yyerror("linkshare already specified");
1980 YYERROR;
1981 }
1982 fairq_opts.linkshare.m2 = $2;
1983 fairq_opts.linkshare.used = 1;
1984 }
1985 | LINKSHARE '(' bandwidth number bandwidth ')' {
1986 if (fairq_opts.linkshare.used) {
1987 yyerror("linkshare already specified");
1988 YYERROR;
1989 }
1990 fairq_opts.linkshare.m1 = $3;
1991 fairq_opts.linkshare.d = $4;
1992 fairq_opts.linkshare.m2 = $5;
1993 fairq_opts.linkshare.used = 1;
1994 }
1995 | HOGS bandwidth {
1996 fairq_opts.hogs_bw = $2;
1997 }
1998 | BUCKETS number {
1999 fairq_opts.nbuckets = $2;
2000 }
2001 | STRING {
2002 if (!strcmp($1, "default"))
2003 fairq_opts.flags |= FARF_DEFAULTCLASS;
2004 else if (!strcmp($1, "red"))
2005 fairq_opts.flags |= FARF_RED;
2006 else if (!strcmp($1, "ecn"))
2007 fairq_opts.flags |= FARF_RED|FARF_ECN;
2008 else if (!strcmp($1, "rio"))
2009 fairq_opts.flags |= FARF_RIO;
2010 else if (!strcmp($1, "codel"))
2011 fairq_opts.flags |= FARF_CODEL;
2012 else {
2013 yyerror("unknown fairq flag \"%s\"", $1);
2014 free($1);
2015 YYERROR;
2016 }
2017 free($1);
2018 }
2019 ;
2020
2021 codel_opts : {
2022 bzero(&codel_opts,
2023 sizeof(struct codel_opts));
2024 }
2025 codelopts_list {
2026 $$ = codel_opts;
2027 }
2028 ;
2029
2030 codelopts_list : codelopts_item
2031 | codelopts_list comma codelopts_item
2032 ;
2033
2034 codelopts_item : INTERVAL number {
2035 if (codel_opts.interval) {
2036 yyerror("interval already specified");
2037 YYERROR;
2038 }
2039 codel_opts.interval = $2;
2040 }
2041 | TARGET number {
2042 if (codel_opts.target) {
2043 yyerror("target already specified");
2044 YYERROR;
2045 }
2046 codel_opts.target = $2;
2047 }
2048 | STRING {
2049 if (!strcmp($1, "ecn"))
2050 codel_opts.ecn = 1;
2051 else {
2052 yyerror("unknown codel option \"%s\"", $1);
2053 free($1);
2054 YYERROR;
2055 }
2056 free($1);
2057 }
2058 ;
2059
2060 qassign : /* empty */ { $$ = NULL; }
2061 | qassign_item { $$ = $1; }
2062 | '{' optnl qassign_list '}' { $$ = $3; }
2063 ;
2064
2065 qassign_list : qassign_item optnl { $$ = $1; }
2066 | qassign_list comma qassign_item optnl {
2067 $1->tail->next = $3;
2068 $1->tail = $3;
2069 $$ = $1;
2070 }
2071 ;
2072
2073 qassign_item : STRING {
2074 $$ = calloc(1, sizeof(struct node_queue));
2075 if ($$ == NULL)
2076 err(1, "qassign_item: calloc");
2077 if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
2078 sizeof($$->queue)) {
2079 yyerror("queue name '%s' too long (max "
2080 "%d chars)", $1, sizeof($$->queue)-1);
2081 free($1);
2082 free($$);
2083 YYERROR;
2084 }
2085 free($1);
2086 $$->next = NULL;
2087 $$->tail = $$;
2088 }
2089 ;
2090
2091 pfrule : action dir logquick interface route af proto fromto
2092 filter_opts
2093 {
2094 struct pfctl_rule r;
2095 struct node_state_opt *o;
2096 struct node_proto *proto;
2097 int srctrack = 0;
2098 int statelock = 0;
2099 int adaptive = 0;
2100 int defaults = 0;
2101
2102 if (check_rulestate(PFCTL_STATE_FILTER))
2103 YYERROR;
2104
2105 memset(&r, 0, sizeof(r));
2106
2107 r.action = $1.b1;
2108 switch ($1.b2) {
2109 case PFRULE_RETURNRST:
2110 r.rule_flag |= PFRULE_RETURNRST;
2111 r.return_ttl = $1.w;
2112 break;
2113 case PFRULE_RETURNICMP:
2114 r.rule_flag |= PFRULE_RETURNICMP;
2115 r.return_icmp = $1.w;
2116 r.return_icmp6 = $1.w2;
2117 break;
2118 case PFRULE_RETURN:
2119 r.rule_flag |= PFRULE_RETURN;
2120 r.return_icmp = $1.w;
2121 r.return_icmp6 = $1.w2;
2122 break;
2123 }
2124 r.direction = $2;
2125 r.log = $3.log;
2126 r.logif = $3.logif;
2127 r.quick = $3.quick;
2128 r.prob = $9.prob;
2129 r.rtableid = $9.rtableid;
2130
2131 if ($9.marker & FOM_PRIO) {
2132 if ($9.prio == 0)
2133 r.prio = PF_PRIO_ZERO;
2134 else
2135 r.prio = $9.prio;
2136 }
2137 if ($9.marker & FOM_SETPRIO) {
2138 r.set_prio[0] = $9.set_prio[0];
2139 r.set_prio[1] = $9.set_prio[1];
2140 r.scrub_flags |= PFSTATE_SETPRIO;
2141 }
2142
2143 r.af = $6;
2144 if ($9.tag)
2145 if (strlcpy(r.tagname, $9.tag,
2146 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2147 yyerror("tag too long, max %u chars",
2148 PF_TAG_NAME_SIZE - 1);
2149 YYERROR;
2150 }
2151 if ($9.match_tag)
2152 if (strlcpy(r.match_tagname, $9.match_tag,
2153 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
2154 yyerror("tag too long, max %u chars",
2155 PF_TAG_NAME_SIZE - 1);
2156 YYERROR;
2157 }
2158 r.match_tag_not = $9.match_tag_not;
2159 if (rule_label(&r, $9.label))
2160 YYERROR;
2161 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
2162 free($9.label[i]);
2163 r.ridentifier = $9.ridentifier;
2164 r.flags = $9.flags.b1;
2165 r.flagset = $9.flags.b2;
2166 if (($9.flags.b1 & $9.flags.b2) != $9.flags.b1) {
2167 yyerror("flags always false");
2168 YYERROR;
2169 }
2170 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
2171 for (proto = $7; proto != NULL &&
2172 proto->proto != IPPROTO_TCP;
2173 proto = proto->next)
2174 ; /* nothing */
2175 if (proto == NULL && $7 != NULL) {
2176 if ($9.flags.b1 || $9.flags.b2)
2177 yyerror(
2178 "flags only apply to tcp");
2179 if ($8.src_os)
2180 yyerror(
2181 "OS fingerprinting only "
2182 "apply to tcp");
2183 YYERROR;
2184 }
2185 #if 0
2186 if (($9.flags.b1 & parse_flags("S")) == 0 &&
2187 $8.src_os) {
2188 yyerror("OS fingerprinting requires "
2189 "the SYN TCP flag (flags S/SA)");
2190 YYERROR;
2191 }
2192 #endif
2193 }
2194
2195 r.tos = $9.tos;
2196 r.keep_state = $9.keep.action;
2197 o = $9.keep.options;
2198
2199 /* 'keep state' by default on pass rules. */
2200 if (!r.keep_state && !r.action &&
2201 !($9.marker & FOM_KEEP)) {
2202 r.keep_state = PF_STATE_NORMAL;
2203 o = keep_state_defaults;
2204 defaults = 1;
2205 }
2206
2207 while (o) {
2208 struct node_state_opt *p = o;
2209
2210 switch (o->type) {
2211 case PF_STATE_OPT_MAX:
2212 if (r.max_states) {
2213 yyerror("state option 'max' "
2214 "multiple definitions");
2215 YYERROR;
2216 }
2217 r.max_states = o->data.max_states;
2218 break;
2219 case PF_STATE_OPT_NOSYNC:
2220 if (r.rule_flag & PFRULE_NOSYNC) {
2221 yyerror("state option 'sync' "
2222 "multiple definitions");
2223 YYERROR;
2224 }
2225 r.rule_flag |= PFRULE_NOSYNC;
2226 break;
2227 case PF_STATE_OPT_SRCTRACK:
2228 if (srctrack) {
2229 yyerror("state option "
2230 "'source-track' "
2231 "multiple definitions");
2232 YYERROR;
2233 }
2234 srctrack = o->data.src_track;
2235 r.rule_flag |= PFRULE_SRCTRACK;
2236 break;
2237 case PF_STATE_OPT_MAX_SRC_STATES:
2238 if (r.max_src_states) {
2239 yyerror("state option "
2240 "'max-src-states' "
2241 "multiple definitions");
2242 YYERROR;
2243 }
2244 if (o->data.max_src_states == 0) {
2245 yyerror("'max-src-states' must "
2246 "be > 0");
2247 YYERROR;
2248 }
2249 r.max_src_states =
2250 o->data.max_src_states;
2251 r.rule_flag |= PFRULE_SRCTRACK;
2252 break;
2253 case PF_STATE_OPT_OVERLOAD:
2254 if (r.overload_tblname[0]) {
2255 yyerror("multiple 'overload' "
2256 "table definitions");
2257 YYERROR;
2258 }
2259 if (strlcpy(r.overload_tblname,
2260 o->data.overload.tblname,
2261 PF_TABLE_NAME_SIZE) >=
2262 PF_TABLE_NAME_SIZE) {
2263 yyerror("state option: "
2264 "strlcpy");
2265 YYERROR;
2266 }
2267 r.flush = o->data.overload.flush;
2268 break;
2269 case PF_STATE_OPT_MAX_SRC_CONN:
2270 if (r.max_src_conn) {
2271 yyerror("state option "
2272 "'max-src-conn' "
2273 "multiple definitions");
2274 YYERROR;
2275 }
2276 if (o->data.max_src_conn == 0) {
2277 yyerror("'max-src-conn' "
2278 "must be > 0");
2279 YYERROR;
2280 }
2281 r.max_src_conn =
2282 o->data.max_src_conn;
2283 r.rule_flag |= PFRULE_SRCTRACK |
2284 PFRULE_RULESRCTRACK;
2285 break;
2286 case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2287 if (r.max_src_conn_rate.limit) {
2288 yyerror("state option "
2289 "'max-src-conn-rate' "
2290 "multiple definitions");
2291 YYERROR;
2292 }
2293 if (!o->data.max_src_conn_rate.limit ||
2294 !o->data.max_src_conn_rate.seconds) {
2295 yyerror("'max-src-conn-rate' "
2296 "values must be > 0");
2297 YYERROR;
2298 }
2299 if (o->data.max_src_conn_rate.limit >
2300 PF_THRESHOLD_MAX) {
2301 yyerror("'max-src-conn-rate' "
2302 "maximum rate must be < %u",
2303 PF_THRESHOLD_MAX);
2304 YYERROR;
2305 }
2306 r.max_src_conn_rate.limit =
2307 o->data.max_src_conn_rate.limit;
2308 r.max_src_conn_rate.seconds =
2309 o->data.max_src_conn_rate.seconds;
2310 r.rule_flag |= PFRULE_SRCTRACK |
2311 PFRULE_RULESRCTRACK;
2312 break;
2313 case PF_STATE_OPT_MAX_SRC_NODES:
2314 if (r.max_src_nodes) {
2315 yyerror("state option "
2316 "'max-src-nodes' "
2317 "multiple definitions");
2318 YYERROR;
2319 }
2320 if (o->data.max_src_nodes == 0) {
2321 yyerror("'max-src-nodes' must "
2322 "be > 0");
2323 YYERROR;
2324 }
2325 r.max_src_nodes =
2326 o->data.max_src_nodes;
2327 r.rule_flag |= PFRULE_SRCTRACK |
2328 PFRULE_RULESRCTRACK;
2329 break;
2330 case PF_STATE_OPT_STATELOCK:
2331 if (statelock) {
2332 yyerror("state locking option: "
2333 "multiple definitions");
2334 YYERROR;
2335 }
2336 statelock = 1;
2337 r.rule_flag |= o->data.statelock;
2338 break;
2339 case PF_STATE_OPT_SLOPPY:
2340 if (r.rule_flag & PFRULE_STATESLOPPY) {
2341 yyerror("state sloppy option: "
2342 "multiple definitions");
2343 YYERROR;
2344 }
2345 r.rule_flag |= PFRULE_STATESLOPPY;
2346 break;
2347 case PF_STATE_OPT_TIMEOUT:
2348 if (o->data.timeout.number ==
2349 PFTM_ADAPTIVE_START ||
2350 o->data.timeout.number ==
2351 PFTM_ADAPTIVE_END)
2352 adaptive = 1;
2353 if (r.timeout[o->data.timeout.number]) {
2354 yyerror("state timeout %s "
2355 "multiple definitions",
2356 pf_timeouts[o->data.
2357 timeout.number].name);
2358 YYERROR;
2359 }
2360 r.timeout[o->data.timeout.number] =
2361 o->data.timeout.seconds;
2362 }
2363 o = o->next;
2364 if (!defaults)
2365 free(p);
2366 }
2367
2368 /* 'flags S/SA' by default on stateful rules */
2369 if (!r.action && !r.flags && !r.flagset &&
2370 !$9.fragment && !($9.marker & FOM_FLAGS) &&
2371 r.keep_state) {
2372 r.flags = parse_flags("S");
2373 r.flagset = parse_flags("SA");
2374 }
2375 if (!adaptive && r.max_states) {
2376 r.timeout[PFTM_ADAPTIVE_START] =
2377 (r.max_states / 10) * 6;
2378 r.timeout[PFTM_ADAPTIVE_END] =
2379 (r.max_states / 10) * 12;
2380 }
2381 if (r.rule_flag & PFRULE_SRCTRACK) {
2382 if (srctrack == PF_SRCTRACK_GLOBAL &&
2383 r.max_src_nodes) {
2384 yyerror("'max-src-nodes' is "
2385 "incompatible with "
2386 "'source-track global'");
2387 YYERROR;
2388 }
2389 if (srctrack == PF_SRCTRACK_GLOBAL &&
2390 r.max_src_conn) {
2391 yyerror("'max-src-conn' is "
2392 "incompatible with "
2393 "'source-track global'");
2394 YYERROR;
2395 }
2396 if (srctrack == PF_SRCTRACK_GLOBAL &&
2397 r.max_src_conn_rate.seconds) {
2398 yyerror("'max-src-conn-rate' is "
2399 "incompatible with "
2400 "'source-track global'");
2401 YYERROR;
2402 }
2403 if (r.timeout[PFTM_SRC_NODE] <
2404 r.max_src_conn_rate.seconds)
2405 r.timeout[PFTM_SRC_NODE] =
2406 r.max_src_conn_rate.seconds;
2407 r.rule_flag |= PFRULE_SRCTRACK;
2408 if (srctrack == PF_SRCTRACK_RULE)
2409 r.rule_flag |= PFRULE_RULESRCTRACK;
2410 }
2411 if (r.keep_state && !statelock)
2412 r.rule_flag |= default_statelock;
2413
2414 if ($9.fragment)
2415 r.rule_flag |= PFRULE_FRAGMENT;
2416 r.allow_opts = $9.allowopts;
2417
2418 decide_address_family($8.src.host, &r.af);
2419 decide_address_family($8.dst.host, &r.af);
2420
2421 if ($5.rt) {
2422 if (!r.direction) {
2423 yyerror("direction must be explicit "
2424 "with rules that specify routing");
2425 YYERROR;
2426 }
2427 r.rt = $5.rt;
2428 r.rpool.opts = $5.pool_opts;
2429 if ($5.key != NULL)
2430 memcpy(&r.rpool.key, $5.key,
2431 sizeof(struct pf_poolhashkey));
2432 }
2433 if (r.rt) {
2434 decide_address_family($5.host, &r.af);
2435 remove_invalid_hosts(&$5.host, &r.af);
2436 if ($5.host == NULL) {
2437 yyerror("no routing address with "
2438 "matching address family found.");
2439 YYERROR;
2440 }
2441 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
2442 PF_POOL_NONE && ($5.host->next != NULL ||
2443 $5.host->addr.type == PF_ADDR_TABLE ||
2444 DYNIF_MULTIADDR($5.host->addr)))
2445 r.rpool.opts |= PF_POOL_ROUNDROBIN;
2446 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2447 PF_POOL_ROUNDROBIN &&
2448 disallow_table($5.host, "tables are only "
2449 "supported in round-robin routing pools"))
2450 YYERROR;
2451 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2452 PF_POOL_ROUNDROBIN &&
2453 disallow_alias($5.host, "interface (%s) "
2454 "is only supported in round-robin "
2455 "routing pools"))
2456 YYERROR;
2457 if ($5.host->next != NULL) {
2458 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
2459 PF_POOL_ROUNDROBIN) {
2460 yyerror("r.rpool.opts must "
2461 "be PF_POOL_ROUNDROBIN");
2462 YYERROR;
2463 }
2464 }
2465 }
2466 if ($9.queues.qname != NULL) {
2467 if (strlcpy(r.qname, $9.queues.qname,
2468 sizeof(r.qname)) >= sizeof(r.qname)) {
2469 yyerror("rule qname too long (max "
2470 "%d chars)", sizeof(r.qname)-1);
2471 YYERROR;
2472 }
2473 free($9.queues.qname);
2474 }
2475 if ($9.queues.pqname != NULL) {
2476 if (strlcpy(r.pqname, $9.queues.pqname,
2477 sizeof(r.pqname)) >= sizeof(r.pqname)) {
2478 yyerror("rule pqname too long (max "
2479 "%d chars)", sizeof(r.pqname)-1);
2480 YYERROR;
2481 }
2482 free($9.queues.pqname);
2483 }
2484 #ifdef __FreeBSD__
2485 r.divert.port = $9.divert.port;
2486 #else
2487 if ((r.divert.port = $9.divert.port)) {
2488 if (r.direction == PF_OUT) {
2489 if ($9.divert.addr) {
2490 yyerror("address specified "
2491 "for outgoing divert");
2492 YYERROR;
2493 }
2494 bzero(&r.divert.addr,
2495 sizeof(r.divert.addr));
2496 } else {
2497 if (!$9.divert.addr) {
2498 yyerror("no address specified "
2499 "for incoming divert");
2500 YYERROR;
2501 }
2502 if ($9.divert.addr->af != r.af) {
2503 yyerror("address family "
2504 "mismatch for divert");
2505 YYERROR;
2506 }
2507 r.divert.addr =
2508 $9.divert.addr->addr.v.a.addr;
2509 }
2510 }
2511 #endif
2512
2513 expand_rule(&r, $4, $5.host, $7, $8.src_os,
2514 $8.src.host, $8.src.port, $8.dst.host, $8.dst.port,
2515 $9.uid, $9.gid, $9.icmpspec, "");
2516 }
2517 ;
2518
2519 filter_opts : {
2520 bzero(&filter_opts, sizeof filter_opts);
2521 filter_opts.rtableid = -1;
2522 }
2523 filter_opts_l
2524 { $$ = filter_opts; }
2525 | /* empty */ {
2526 bzero(&filter_opts, sizeof filter_opts);
2527 filter_opts.rtableid = -1;
2528 $$ = filter_opts;
2529 }
2530 ;
2531
2532 filter_opts_l : filter_opts_l filter_opt
2533 | filter_opt
2534 ;
2535
2536 filter_opt : USER uids {
2537 if (filter_opts.uid)
2538 $2->tail->next = filter_opts.uid;
2539 filter_opts.uid = $2;
2540 }
2541 | GROUP gids {
2542 if (filter_opts.gid)
2543 $2->tail->next = filter_opts.gid;
2544 filter_opts.gid = $2;
2545 }
2546 | flags {
2547 if (filter_opts.marker & FOM_FLAGS) {
2548 yyerror("flags cannot be redefined");
2549 YYERROR;
2550 }
2551 filter_opts.marker |= FOM_FLAGS;
2552 filter_opts.flags.b1 |= $1.b1;
2553 filter_opts.flags.b2 |= $1.b2;
2554 filter_opts.flags.w |= $1.w;
2555 filter_opts.flags.w2 |= $1.w2;
2556 }
2557 | icmpspec {
2558 if (filter_opts.marker & FOM_ICMP) {
2559 yyerror("icmp-type cannot be redefined");
2560 YYERROR;
2561 }
2562 filter_opts.marker |= FOM_ICMP;
2563 filter_opts.icmpspec = $1;
2564 }
2565 | PRIO NUMBER {
2566 if (filter_opts.marker & FOM_PRIO) {
2567 yyerror("prio cannot be redefined");
2568 YYERROR;
2569 }
2570 if ($2 < 0 || $2 > PF_PRIO_MAX) {
2571 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2572 YYERROR;
2573 }
2574 filter_opts.marker |= FOM_PRIO;
2575 filter_opts.prio = $2;
2576 }
2577 | TOS tos {
2578 if (filter_opts.marker & FOM_TOS) {
2579 yyerror("tos cannot be redefined");
2580 YYERROR;
2581 }
2582 filter_opts.marker |= FOM_TOS;
2583 filter_opts.tos = $2;
2584 }
2585 | keep {
2586 if (filter_opts.marker & FOM_KEEP) {
2587 yyerror("modulate or keep cannot be redefined");
2588 YYERROR;
2589 }
2590 filter_opts.marker |= FOM_KEEP;
2591 filter_opts.keep.action = $1.action;
2592 filter_opts.keep.options = $1.options;
2593 }
2594 | RIDENTIFIER number {
2595 filter_opts.ridentifier = $2;
2596 }
2597 | FRAGMENT {
2598 filter_opts.fragment = 1;
2599 }
2600 | ALLOWOPTS {
2601 filter_opts.allowopts = 1;
2602 }
2603 | label {
2604 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
2605 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
2606 YYERROR;
2607 }
2608 filter_opts.label[filter_opts.labelcount++] = $1;
2609 }
2610 | qname {
2611 if (filter_opts.queues.qname) {
2612 yyerror("queue cannot be redefined");
2613 YYERROR;
2614 }
2615 filter_opts.queues = $1;
2616 }
2617 | TAG string {
2618 filter_opts.tag = $2;
2619 }
2620 | not TAGGED string {
2621 filter_opts.match_tag = $3;
2622 filter_opts.match_tag_not = $1;
2623 }
2624 | PROBABILITY probability {
2625 double p;
2626
2627 p = floor($2 * UINT_MAX + 0.5);
2628 if (p < 0.0 || p > UINT_MAX) {
2629 yyerror("invalid probability: %lf", p);
2630 YYERROR;
2631 }
2632 filter_opts.prob = (u_int32_t)p;
2633 if (filter_opts.prob == 0)
2634 filter_opts.prob = 1;
2635 }
2636 | RTABLE NUMBER {
2637 if ($2 < 0 || $2 > rt_tableid_max()) {
2638 yyerror("invalid rtable id");
2639 YYERROR;
2640 }
2641 filter_opts.rtableid = $2;
2642 }
2643 | DIVERTTO portplain {
2644 #ifdef __FreeBSD__
2645 filter_opts.divert.port = $2.a;
2646 if (!filter_opts.divert.port) {
2647 yyerror("invalid divert port: %u", ntohs($2.a));
2648 YYERROR;
2649 }
2650 #endif
2651 }
2652 | DIVERTTO STRING PORT portplain {
2653 #ifndef __FreeBSD__
2654 if ((filter_opts.divert.addr = host($2)) == NULL) {
2655 yyerror("could not parse divert address: %s",
2656 $2);
2657 free($2);
2658 YYERROR;
2659 }
2660 #else
2661 if ($2)
2662 #endif
2663 free($2);
2664 filter_opts.divert.port = $4.a;
2665 if (!filter_opts.divert.port) {
2666 yyerror("invalid divert port: %u", ntohs($4.a));
2667 YYERROR;
2668 }
2669 }
2670 | DIVERTREPLY {
2671 #ifdef __FreeBSD__
2672 yyerror("divert-reply has no meaning in FreeBSD pf(4)");
2673 YYERROR;
2674 #else
2675 filter_opts.divert.port = 1; /* some random value */
2676 #endif
2677 }
2678 | filter_sets
2679 ;
2680
2681 filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; }
2682 | SET filter_set { $$ = filter_opts; }
2683 ;
2684
2685 filter_sets_l : filter_sets_l comma filter_set
2686 | filter_set
2687 ;
2688
2689 filter_set : prio {
2690 if (filter_opts.marker & FOM_SETPRIO) {
2691 yyerror("prio cannot be redefined");
2692 YYERROR;
2693 }
2694 filter_opts.marker |= FOM_SETPRIO;
2695 filter_opts.set_prio[0] = $1.b1;
2696 filter_opts.set_prio[1] = $1.b2;
2697 }
2698 prio : PRIO NUMBER {
2699 if ($2 < 0 || $2 > PF_PRIO_MAX) {
2700 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2701 YYERROR;
2702 }
2703 $$.b1 = $$.b2 = $2;
2704 }
2705 | PRIO '(' NUMBER comma NUMBER ')' {
2706 if ($3 < 0 || $3 > PF_PRIO_MAX ||
2707 $5 < 0 || $5 > PF_PRIO_MAX) {
2708 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2709 YYERROR;
2710 }
2711 $$.b1 = $3;
2712 $$.b2 = $5;
2713 }
2714 ;
2715
2716 probability : STRING {
2717 char *e;
2718 double p = strtod($1, &e);
2719
2720 if (*e == '%') {
2721 p *= 0.01;
2722 e++;
2723 }
2724 if (*e) {
2725 yyerror("invalid probability: %s", $1);
2726 free($1);
2727 YYERROR;
2728 }
2729 free($1);
2730 $$ = p;
2731 }
2732 | NUMBER {
2733 $$ = (double)$1;
2734 }
2735 ;
2736
2737
2738 action : PASS {
2739 $$.b1 = PF_PASS;
2740 $$.b2 = failpolicy;
2741 $$.w = returnicmpdefault;
2742 $$.w2 = returnicmp6default;
2743 }
2744 | MATCH { $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; }
2745 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; }
2746 ;
2747
2748 blockspec : /* empty */ {
2749 $$.b2 = blockpolicy;
2750 $$.w = returnicmpdefault;
2751 $$.w2 = returnicmp6default;
2752 }
2753 | DROP {
2754 $$.b2 = PFRULE_DROP;
2755 $$.w = 0;
2756 $$.w2 = 0;
2757 }
2758 | RETURNRST {
2759 $$.b2 = PFRULE_RETURNRST;
2760 $$.w = 0;
2761 $$.w2 = 0;
2762 }
2763 | RETURNRST '(' TTL NUMBER ')' {
2764 if ($4 < 0 || $4 > 255) {
2765 yyerror("illegal ttl value %d", $4);
2766 YYERROR;
2767 }
2768 $$.b2 = PFRULE_RETURNRST;
2769 $$.w = $4;
2770 $$.w2 = 0;
2771 }
2772 | RETURNICMP {
2773 $$.b2 = PFRULE_RETURNICMP;
2774 $$.w = returnicmpdefault;
2775 $$.w2 = returnicmp6default;
2776 }
2777 | RETURNICMP6 {
2778 $$.b2 = PFRULE_RETURNICMP;
2779 $$.w = returnicmpdefault;
2780 $$.w2 = returnicmp6default;
2781 }
2782 | RETURNICMP '(' reticmpspec ')' {
2783 $$.b2 = PFRULE_RETURNICMP;
2784 $$.w = $3;
2785 $$.w2 = returnicmpdefault;
2786 }
2787 | RETURNICMP6 '(' reticmp6spec ')' {
2788 $$.b2 = PFRULE_RETURNICMP;
2789 $$.w = returnicmpdefault;
2790 $$.w2 = $3;
2791 }
2792 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
2793 $$.b2 = PFRULE_RETURNICMP;
2794 $$.w = $3;
2795 $$.w2 = $5;
2796 }
2797 | RETURN {
2798 $$.b2 = PFRULE_RETURN;
2799 $$.w = returnicmpdefault;
2800 $$.w2 = returnicmp6default;
2801 }
2802 ;
2803
2804 reticmpspec : STRING {
2805 if (!($$ = parseicmpspec($1, AF_INET))) {
2806 free($1);
2807 YYERROR;
2808 }
2809 free($1);
2810 }
2811 | NUMBER {
2812 u_int8_t icmptype;
2813
2814 if ($1 < 0 || $1 > 255) {
2815 yyerror("invalid icmp code %lu", $1);
2816 YYERROR;
2817 }
2818 icmptype = returnicmpdefault >> 8;
2819 $$ = (icmptype << 8 | $1);
2820 }
2821 ;
2822
2823 reticmp6spec : STRING {
2824 if (!($$ = parseicmpspec($1, AF_INET6))) {
2825 free($1);
2826 YYERROR;
2827 }
2828 free($1);
2829 }
2830 | NUMBER {
2831 u_int8_t icmptype;
2832
2833 if ($1 < 0 || $1 > 255) {
2834 yyerror("invalid icmp code %lu", $1);
2835 YYERROR;
2836 }
2837 icmptype = returnicmp6default >> 8;
2838 $$ = (icmptype << 8 | $1);
2839 }
2840 ;
2841
2842 dir : /* empty */ { $$ = PF_INOUT; }
2843 | IN { $$ = PF_IN; }
2844 | OUT { $$ = PF_OUT; }
2845 ;
2846
2847 quick : /* empty */ { $$.quick = 0; }
2848 | QUICK { $$.quick = 1; }
2849 ;
2850
2851 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; }
2852 | log { $$ = $1; $$.quick = 0; }
2853 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; }
2854 | log QUICK { $$ = $1; $$.quick = 1; }
2855 | QUICK log { $$ = $2; $$.quick = 1; }
2856 ;
2857
2858 log : LOG { $$.log = PF_LOG; $$.logif = 0; }
2859 | LOG '(' logopts ')' {
2860 $$.log = PF_LOG | $3.log;
2861 $$.logif = $3.logif;
2862 }
2863 ;
2864
2865 logopts : logopt { $$ = $1; }
2866 | logopts comma logopt {
2867 $$.log = $1.log | $3.log;
2868 $$.logif = $3.logif;
2869 if ($$.logif == 0)
2870 $$.logif = $1.logif;
2871 }
2872 ;
2873
2874 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; }
2875 | USER { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2876 | GROUP { $$.log = PF_LOG_SOCKET_LOOKUP; $$.logif = 0; }
2877 | TO string {
2878 const char *errstr;
2879 u_int i;
2880
2881 $$.log = 0;
2882 if (strncmp($2, "pflog", 5)) {
2883 yyerror("%s: should be a pflog interface", $2);
2884 free($2);
2885 YYERROR;
2886 }
2887 i = strtonum($2 + 5, 0, 255, &errstr);
2888 if (errstr) {
2889 yyerror("%s: %s", $2, errstr);
2890 free($2);
2891 YYERROR;
2892 }
2893 free($2);
2894 $$.logif = i;
2895 }
2896 ;
2897
2898 interface : /* empty */ { $$ = NULL; }
2899 | ON if_item_not { $$ = $2; }
2900 | ON '{' optnl if_list '}' { $$ = $4; }
2901 ;
2902
2903 if_list : if_item_not optnl { $$ = $1; }
2904 | if_list comma if_item_not optnl {
2905 $1->tail->next = $3;
2906 $1->tail = $3;
2907 $$ = $1;
2908 }
2909 ;
2910
2911 if_item_not : not if_item { $$ = $2; $$->not = $1; }
2912 ;
2913
2914 if_item : STRING {
2915 struct node_host *n;
2916
2917 $$ = calloc(1, sizeof(struct node_if));
2918 if ($$ == NULL)
2919 err(1, "if_item: calloc");
2920 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
2921 sizeof($$->ifname)) {
2922 free($1);
2923 free($$);
2924 yyerror("interface name too long");
2925 YYERROR;
2926 }
2927
2928 if ((n = ifa_exists($1)) != NULL)
2929 $$->ifa_flags = n->ifa_flags;
2930
2931 free($1);
2932 $$->not = 0;
2933 $$->next = NULL;
2934 $$->tail = $$;
2935 }
2936 ;
2937
2938 af : /* empty */ { $$ = 0; }
2939 | INET { $$ = AF_INET; }
2940 | INET6 { $$ = AF_INET6; }
2941 ;
2942
2943 proto : /* empty */ { $$ = NULL; }
2944 | PROTO proto_item { $$ = $2; }
2945 | PROTO '{' optnl proto_list '}' { $$ = $4; }
2946 ;
2947
2948 proto_list : proto_item optnl { $$ = $1; }
2949 | proto_list comma proto_item optnl {
2950 $1->tail->next = $3;
2951 $1->tail = $3;
2952 $$ = $1;
2953 }
2954 ;
2955
2956 proto_item : protoval {
2957 u_int8_t pr;
2958
2959 pr = (u_int8_t)$1;
2960 if (pr == 0) {
2961 yyerror("proto 0 cannot be used");
2962 YYERROR;
2963 }
2964 $$ = calloc(1, sizeof(struct node_proto));
2965 if ($$ == NULL)
2966 err(1, "proto_item: calloc");
2967 $$->proto = pr;
2968 $$->next = NULL;
2969 $$->tail = $$;
2970 }
2971 ;
2972
2973 protoval : STRING {
2974 struct protoent *p;
2975
2976 p = getprotobyname($1);
2977 if (p == NULL) {
2978 yyerror("unknown protocol %s", $1);
2979 free($1);
2980 YYERROR;
2981 }
2982 $$ = p->p_proto;
2983 free($1);
2984 }
2985 | NUMBER {
2986 if ($1 < 0 || $1 > 255) {
2987 yyerror("protocol outside range");
2988 YYERROR;
2989 }
2990 }
2991 ;
2992
2993 fromto : ALL {
2994 $$.src.host = NULL;
2995 $$.src.port = NULL;
2996 $$.dst.host = NULL;
2997 $$.dst.port = NULL;
2998 $$.src_os = NULL;
2999 }
3000 | from os to {
3001 $$.src = $1;
3002 $$.src_os = $2;
3003 $$.dst = $3;
3004 }
3005 ;
3006
3007 os : /* empty */ { $$ = NULL; }
3008 | OS xos { $$ = $2; }
3009 | OS '{' optnl os_list '}' { $$ = $4; }
3010 ;
3011
3012 xos : STRING {
3013 $$ = calloc(1, sizeof(struct node_os));
3014 if ($$ == NULL)
3015 err(1, "os: calloc");
3016 $$->os = $1;
3017 $$->tail = $$;
3018 }
3019 ;
3020
3021 os_list : xos optnl { $$ = $1; }
3022 | os_list comma xos optnl {
3023 $1->tail->next = $3;
3024 $1->tail = $3;
3025 $$ = $1;
3026 }
3027 ;
3028
3029 from : /* empty */ {
3030 $$.host = NULL;
3031 $$.port = NULL;
3032 }
3033 | FROM ipportspec {
3034 $$ = $2;
3035 }
3036 ;
3037
3038 to : /* empty */ {
3039 $$.host = NULL;
3040 $$.port = NULL;
3041 }
3042 | TO ipportspec {
3043 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
3044 "not permitted in a destination address"))
3045 YYERROR;
3046 $$ = $2;
3047 }
3048 ;
3049
3050 ipportspec : ipspec {
3051 $$.host = $1;
3052 $$.port = NULL;
3053 }
3054 | ipspec PORT portspec {
3055 $$.host = $1;
3056 $$.port = $3;
3057 }
3058 | PORT portspec {
3059 $$.host = NULL;
3060 $$.port = $2;
3061 }
3062 ;
3063
3064 optnl : '\n' optnl
3065 |
3066 ;
3067
3068 ipspec : ANY { $$ = NULL; }
3069 | xhost { $$ = $1; }
3070 | '{' optnl host_list '}' { $$ = $3; }
3071 ;
3072
3073 toipspec : TO ipspec { $$ = $2; }
3074 | /* empty */ { $$ = NULL; }
3075 ;
3076
3077 host_list : ipspec optnl { $$ = $1; }
3078 | host_list comma ipspec optnl {
3079 if ($3 == NULL)
3080 $$ = $1;
3081 else if ($1 == NULL)
3082 $$ = $3;
3083 else {
3084 $1->tail->next = $3;
3085 $1->tail = $3->tail;
3086 $$ = $1;
3087 }
3088 }
3089 ;
3090
3091 xhost : not host {
3092 struct node_host *n;
3093
3094 for (n = $2; n != NULL; n = n->next)
3095 n->not = $1;
3096 $$ = $2;
3097 }
3098 | not NOROUTE {
3099 $$ = calloc(1, sizeof(struct node_host));
3100 if ($$ == NULL)
3101 err(1, "xhost: calloc");
3102 $$->addr.type = PF_ADDR_NOROUTE;
3103 $$->next = NULL;
3104 $$->not = $1;
3105 $$->tail = $$;
3106 }
3107 | not URPFFAILED {
3108 $$ = calloc(1, sizeof(struct node_host));
3109 if ($$ == NULL)
3110 err(1, "xhost: calloc");
3111 $$->addr.type = PF_ADDR_URPFFAILED;
3112 $$->next = NULL;
3113 $$->not = $1;
3114 $$->tail = $$;
3115 }
3116 ;
3117
3118 host : STRING {
3119 if (($$ = host($1)) == NULL) {
3120 /* error. "any" is handled elsewhere */
3121 free($1);
3122 yyerror("could not parse host specification");
3123 YYERROR;
3124 }
3125 free($1);
3126
3127 }
3128 | STRING '-' STRING {
3129 struct node_host *b, *e;
3130
3131 if ((b = host($1)) == NULL || (e = host($3)) == NULL) {
3132 free($1);
3133 free($3);
3134 yyerror("could not parse host specification");
3135 YYERROR;
3136 }
3137 if (b->af != e->af ||
3138 b->addr.type != PF_ADDR_ADDRMASK ||
3139 e->addr.type != PF_ADDR_ADDRMASK ||
3140 unmask(&b->addr.v.a.mask, b->af) !=
3141 (b->af == AF_INET ? 32 : 128) ||
3142 unmask(&e->addr.v.a.mask, e->af) !=
3143 (e->af == AF_INET ? 32 : 128) ||
3144 b->next != NULL || b->not ||
3145 e->next != NULL || e->not) {
3146 free(b);
3147 free(e);
3148 free($1);
3149 free($3);
3150 yyerror("invalid address range");
3151 YYERROR;
3152 }
3153 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
3154 sizeof(b->addr.v.a.mask));
3155 b->addr.type = PF_ADDR_RANGE;
3156 $$ = b;
3157 free(e);
3158 free($1);
3159 free($3);
3160 }
3161 | STRING '/' NUMBER {
3162 char *buf;
3163
3164 if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1)
3165 err(1, "host: asprintf");
3166 free($1);
3167 if (($$ = host(buf)) == NULL) {
3168 /* error. "any" is handled elsewhere */
3169 free(buf);
3170 yyerror("could not parse host specification");
3171 YYERROR;
3172 }
3173 free(buf);
3174 }
3175 | NUMBER '/' NUMBER {
3176 char *buf;
3177
3178 /* ie. for 10/8 parsing */
3179 #ifdef __FreeBSD__
3180 if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1)
3181 #else
3182 if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
3183 #endif
3184 err(1, "host: asprintf");
3185 if (($$ = host(buf)) == NULL) {
3186 /* error. "any" is handled elsewhere */
3187 free(buf);
3188 yyerror("could not parse host specification");
3189 YYERROR;
3190 }
3191 free(buf);
3192 }
3193 | dynaddr
3194 | dynaddr '/' NUMBER {
3195 struct node_host *n;
3196
3197 if ($3 < 0 || $3 > 128) {
3198 yyerror("bit number too big");
3199 YYERROR;
3200 }
3201 $$ = $1;
3202 for (n = $1; n != NULL; n = n->next)
3203 set_ipmask(n, $3);
3204 }
3205 | '<' STRING '>' {
3206 if (strlen($2) >= PF_TABLE_NAME_SIZE) {
3207 yyerror("table name '%s' too long", $2);
3208 free($2);
3209 YYERROR;
3210 }
3211 $$ = calloc(1, sizeof(struct node_host));
3212 if ($$ == NULL)
3213 err(1, "host: calloc");
3214 $$->addr.type = PF_ADDR_TABLE;
3215 if (strlcpy($$->addr.v.tblname, $2,
3216 sizeof($$->addr.v.tblname)) >=
3217 sizeof($$->addr.v.tblname))
3218 errx(1, "host: strlcpy");
3219 free($2);
3220 $$->next = NULL;
3221 $$->tail = $$;
3222 }
3223 ;
3224
3225 number : NUMBER
3226 | STRING {
3227 u_long ulval;
3228
3229 if (atoul($1, &ulval) == -1) {
3230 yyerror("%s is not a number", $1);
3231 free($1);
3232 YYERROR;
3233 } else
3234 $$ = ulval;
3235 free($1);
3236 }
3237 ;
3238
3239 dynaddr : '(' STRING ')' {
3240 int flags = 0;
3241 char *p, *op;
3242
3243 op = $2;
3244 if (!isalpha(op[0])) {
3245 yyerror("invalid interface name '%s'", op);
3246 free(op);
3247 YYERROR;
3248 }
3249 while ((p = strrchr($2, ':')) != NULL) {
3250 if (!strcmp(p+1, "network"))
3251 flags |= PFI_AFLAG_NETWORK;
3252 else if (!strcmp(p+1, "broadcast"))
3253 flags |= PFI_AFLAG_BROADCAST;
3254 else if (!strcmp(p+1, "peer"))
3255 flags |= PFI_AFLAG_PEER;
3256 else if (!strcmp(p+1, "0"))
3257 flags |= PFI_AFLAG_NOALIAS;
3258 else {
3259 yyerror("interface %s has bad modifier",
3260 $2);
3261 free(op);
3262 YYERROR;
3263 }
3264 *p = '\0';
3265 }
3266 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3267 free(op);
3268 yyerror("illegal combination of "
3269 "interface modifiers");
3270 YYERROR;
3271 }
3272 $$ = calloc(1, sizeof(struct node_host));
3273 if ($$ == NULL)
3274 err(1, "address: calloc");
3275 $$->af = 0;
3276 set_ipmask($$, 128);
3277 $$->addr.type = PF_ADDR_DYNIFTL;
3278 $$->addr.iflags = flags;
3279 if (strlcpy($$->addr.v.ifname, $2,
3280 sizeof($$->addr.v.ifname)) >=
3281 sizeof($$->addr.v.ifname)) {
3282 free(op);
3283 free($$);
3284 yyerror("interface name too long");
3285 YYERROR;
3286 }
3287 free(op);
3288 $$->next = NULL;
3289 $$->tail = $$;
3290 }
3291 ;
3292
3293 portspec : port_item { $$ = $1; }
3294 | '{' optnl port_list '}' { $$ = $3; }
3295 ;
3296
3297 port_list : port_item optnl { $$ = $1; }
3298 | port_list comma port_item optnl {
3299 $1->tail->next = $3;
3300 $1->tail = $3;
3301 $$ = $1;
3302 }
3303 ;
3304
3305 port_item : portrange {
3306 $$ = calloc(1, sizeof(struct node_port));
3307 if ($$ == NULL)
3308 err(1, "port_item: calloc");
3309 $$->port[0] = $1.a;
3310 $$->port[1] = $1.b;
3311 if ($1.t)
3312 $$->op = PF_OP_RRG;
3313 else
3314 $$->op = PF_OP_EQ;
3315 $$->next = NULL;
3316 $$->tail = $$;
3317 }
3318 | unaryop portrange {
3319 if ($2.t) {
3320 yyerror("':' cannot be used with an other "
3321 "port operator");
3322 YYERROR;
3323 }
3324 $$ = calloc(1, sizeof(struct node_port));
3325 if ($$ == NULL)
3326 err(1, "port_item: calloc");
3327 $$->port[0] = $2.a;
3328 $$->port[1] = $2.b;
3329 $$->op = $1;
3330 $$->next = NULL;
3331 $$->tail = $$;
3332 }
3333 | portrange PORTBINARY portrange {
3334 if ($1.t || $3.t) {
3335 yyerror("':' cannot be used with an other "
3336 "port operator");
3337 YYERROR;
3338 }
3339 $$ = calloc(1, sizeof(struct node_port));
3340 if ($$ == NULL)
3341 err(1, "port_item: calloc");
3342 $$->port[0] = $1.a;
3343 $$->port[1] = $3.a;
3344 $$->op = $2;
3345 $$->next = NULL;
3346 $$->tail = $$;
3347 }
3348 ;
3349
3350 portplain : numberstring {
3351 if (parseport($1, &$$, 0) == -1) {
3352 free($1);
3353 YYERROR;
3354 }
3355 free($1);
3356 }
3357 ;
3358
3359 portrange : numberstring {
3360 if (parseport($1, &$$, PPORT_RANGE) == -1) {
3361 free($1);
3362 YYERROR;
3363 }
3364 free($1);
3365 }
3366 ;
3367
3368 uids : uid_item { $$ = $1; }
3369 | '{' optnl uid_list '}' { $$ = $3; }
3370 ;
3371
3372 uid_list : uid_item optnl { $$ = $1; }
3373 | uid_list comma uid_item optnl {
3374 $1->tail->next = $3;
3375 $1->tail = $3;
3376 $$ = $1;
3377 }
3378 ;
3379
3380 uid_item : uid {
3381 $$ = calloc(1, sizeof(struct node_uid));
3382 if ($$ == NULL)
3383 err(1, "uid_item: calloc");
3384 $$->uid[0] = $1;
3385 $$->uid[1] = $1;
3386 $$->op = PF_OP_EQ;
3387 $$->next = NULL;
3388 $$->tail = $$;
3389 }
3390 | unaryop uid {
3391 if ($2 == UID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3392 yyerror("user unknown requires operator = or "
3393 "!=");
3394 YYERROR;
3395 }
3396 $$ = calloc(1, sizeof(struct node_uid));
3397 if ($$ == NULL)
3398 err(1, "uid_item: calloc");
3399 $$->uid[0] = $2;
3400 $$->uid[1] = $2;
3401 $$->op = $1;
3402 $$->next = NULL;
3403 $$->tail = $$;
3404 }
3405 | uid PORTBINARY uid {
3406 if ($1 == UID_MAX || $3 == UID_MAX) {
3407 yyerror("user unknown requires operator = or "
3408 "!=");
3409 YYERROR;
3410 }
3411 $$ = calloc(1, sizeof(struct node_uid));
3412 if ($$ == NULL)
3413 err(1, "uid_item: calloc");
3414 $$->uid[0] = $1;
3415 $$->uid[1] = $3;
3416 $$->op = $2;
3417 $$->next = NULL;
3418 $$->tail = $$;
3419 }
3420 ;
3421
3422 uid : STRING {
3423 if (!strcmp($1, "unknown"))
3424 $$ = UID_MAX;
3425 else {
3426 struct passwd *pw;
3427
3428 if ((pw = getpwnam($1)) == NULL) {
3429 yyerror("unknown user %s", $1);
3430 free($1);
3431 YYERROR;
3432 }
3433 $$ = pw->pw_uid;
3434 }
3435 free($1);
3436 }
3437 | NUMBER {
3438 if ($1 < 0 || $1 >= UID_MAX) {
3439 yyerror("illegal uid value %lu", $1);
3440 YYERROR;
3441 }
3442 $$ = $1;
3443 }
3444 ;
3445
3446 gids : gid_item { $$ = $1; }
3447 | '{' optnl gid_list '}' { $$ = $3; }
3448 ;
3449
3450 gid_list : gid_item optnl { $$ = $1; }
3451 | gid_list comma gid_item optnl {
3452 $1->tail->next = $3;
3453 $1->tail = $3;
3454 $$ = $1;
3455 }
3456 ;
3457
3458 gid_item : gid {
3459 $$ = calloc(1, sizeof(struct node_gid));
3460 if ($$ == NULL)
3461 err(1, "gid_item: calloc");
3462 $$->gid[0] = $1;
3463 $$->gid[1] = $1;
3464 $$->op = PF_OP_EQ;
3465 $$->next = NULL;
3466 $$->tail = $$;
3467 }
3468 | unaryop gid {
3469 if ($2 == GID_MAX && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3470 yyerror("group unknown requires operator = or "
3471 "!=");
3472 YYERROR;
3473 }
3474 $$ = calloc(1, sizeof(struct node_gid));
3475 if ($$ == NULL)
3476 err(1, "gid_item: calloc");
3477 $$->gid[0] = $2;
3478 $$->gid[1] = $2;
3479 $$->op = $1;
3480 $$->next = NULL;
3481 $$->tail = $$;
3482 }
3483 | gid PORTBINARY gid {
3484 if ($1 == GID_MAX || $3 == GID_MAX) {
3485 yyerror("group unknown requires operator = or "
3486 "!=");
3487 YYERROR;
3488 }
3489 $$ = calloc(1, sizeof(struct node_gid));
3490 if ($$ == NULL)
3491 err(1, "gid_item: calloc");
3492 $$->gid[0] = $1;
3493 $$->gid[1] = $3;
3494 $$->op = $2;
3495 $$->next = NULL;
3496 $$->tail = $$;
3497 }
3498 ;
3499
3500 gid : STRING {
3501 if (!strcmp($1, "unknown"))
3502 $$ = GID_MAX;
3503 else {
3504 struct group *grp;
3505
3506 if ((grp = getgrnam($1)) == NULL) {
3507 yyerror("unknown group %s", $1);
3508 free($1);
3509 YYERROR;
3510 }
3511 $$ = grp->gr_gid;
3512 }
3513 free($1);
3514 }
3515 | NUMBER {
3516 if ($1 < 0 || $1 >= GID_MAX) {
3517 yyerror("illegal gid value %lu", $1);
3518 YYERROR;
3519 }
3520 $$ = $1;
3521 }
3522 ;
3523
3524 flag : STRING {
3525 int f;
3526
3527 if ((f = parse_flags($1)) < 0) {
3528 yyerror("bad flags %s", $1);
3529 free($1);
3530 YYERROR;
3531 }
3532 free($1);
3533 $$.b1 = f;
3534 }
3535 ;
3536
3537 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; }
3538 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; }
3539 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; }
3540 ;
3541
3542 icmpspec : ICMPTYPE icmp_item { $$ = $2; }
3543 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; }
3544 | ICMP6TYPE icmp6_item { $$ = $2; }
3545 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; }
3546 ;
3547
3548 icmp_list : icmp_item optnl { $$ = $1; }
3549 | icmp_list comma icmp_item optnl {
3550 $1->tail->next = $3;
3551 $1->tail = $3;
3552 $$ = $1;
3553 }
3554 ;
3555
3556 icmp6_list : icmp6_item optnl { $$ = $1; }
3557 | icmp6_list comma icmp6_item optnl {
3558 $1->tail->next = $3;
3559 $1->tail = $3;
3560 $$ = $1;
3561 }
3562 ;
3563
3564 icmp_item : icmptype {
3565 $$ = calloc(1, sizeof(struct node_icmp));
3566 if ($$ == NULL)
3567 err(1, "icmp_item: calloc");
3568 $$->type = $1;
3569 $$->code = 0;
3570 $$->proto = IPPROTO_ICMP;
3571 $$->next = NULL;
3572 $$->tail = $$;
3573 }
3574 | icmptype CODE STRING {
3575 const struct icmpcodeent *p;
3576
3577 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
3578 yyerror("unknown icmp-code %s", $3);
3579 free($3);
3580 YYERROR;
3581 }
3582
3583 free($3);
3584 $$ = calloc(1, sizeof(struct node_icmp));
3585 if ($$ == NULL)
3586 err(1, "icmp_item: calloc");
3587 $$->type = $1;
3588 $$->code = p->code + 1;
3589 $$->proto = IPPROTO_ICMP;
3590 $$->next = NULL;
3591 $$->tail = $$;
3592 }
3593 | icmptype CODE NUMBER {
3594 if ($3 < 0 || $3 > 255) {
3595 yyerror("illegal icmp-code %lu", $3);
3596 YYERROR;
3597 }
3598 $$ = calloc(1, sizeof(struct node_icmp));
3599 if ($$ == NULL)
3600 err(1, "icmp_item: calloc");
3601 $$->type = $1;
3602 $$->code = $3 + 1;
3603 $$->proto = IPPROTO_ICMP;
3604 $$->next = NULL;
3605 $$->tail = $$;
3606 }
3607 ;
3608
3609 icmp6_item : icmp6type {
3610 $$ = calloc(1, sizeof(struct node_icmp));
3611 if ($$ == NULL)
3612 err(1, "icmp_item: calloc");
3613 $$->type = $1;
3614 $$->code = 0;
3615 $$->proto = IPPROTO_ICMPV6;
3616 $$->next = NULL;
3617 $$->tail = $$;
3618 }
3619 | icmp6type CODE STRING {
3620 const struct icmpcodeent *p;
3621
3622 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
3623 yyerror("unknown icmp6-code %s", $3);
3624 free($3);
3625 YYERROR;
3626 }
3627 free($3);
3628
3629 $$ = calloc(1, sizeof(struct node_icmp));
3630 if ($$ == NULL)
3631 err(1, "icmp_item: calloc");
3632 $$->type = $1;
3633 $$->code = p->code + 1;
3634 $$->proto = IPPROTO_ICMPV6;
3635 $$->next = NULL;
3636 $$->tail = $$;
3637 }
3638 | icmp6type CODE NUMBER {
3639 if ($3 < 0 || $3 > 255) {
3640 yyerror("illegal icmp-code %lu", $3);
3641 YYERROR;
3642 }
3643 $$ = calloc(1, sizeof(struct node_icmp));
3644 if ($$ == NULL)
3645 err(1, "icmp_item: calloc");
3646 $$->type = $1;
3647 $$->code = $3 + 1;
3648 $$->proto = IPPROTO_ICMPV6;
3649 $$->next = NULL;
3650 $$->tail = $$;
3651 }
3652 ;
3653
3654 icmptype : STRING {
3655 const struct icmptypeent *p;
3656
3657 if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
3658 yyerror("unknown icmp-type %s", $1);
3659 free($1);
3660 YYERROR;
3661 }
3662 $$ = p->type + 1;
3663 free($1);
3664 }
3665 | NUMBER {
3666 if ($1 < 0 || $1 > 255) {
3667 yyerror("illegal icmp-type %lu", $1);
3668 YYERROR;
3669 }
3670 $$ = $1 + 1;
3671 }
3672 ;
3673
3674 icmp6type : STRING {
3675 const struct icmptypeent *p;
3676
3677 if ((p = geticmptypebyname($1, AF_INET6)) ==
3678 NULL) {
3679 yyerror("unknown icmp6-type %s", $1);
3680 free($1);
3681 YYERROR;
3682 }
3683 $$ = p->type + 1;
3684 free($1);
3685 }
3686 | NUMBER {
3687 if ($1 < 0 || $1 > 255) {
3688 yyerror("illegal icmp6-type %lu", $1);
3689 YYERROR;
3690 }
3691 $$ = $1 + 1;
3692 }
3693 ;
3694
3695 tos : STRING {
3696 int val;
3697 char *end;
3698
3699 if (map_tos($1, &val))
3700 $$ = val;
3701 else if ($1[0] == '0' && $1[1] == 'x') {
3702 errno = 0;
3703 $$ = strtoul($1, &end, 16);
3704 if (errno || *end != '\0')
3705 $$ = 256;
3706 } else
3707 $$ = 256; /* flag bad argument */
3708 if ($$ < 0 || $$ > 255) {
3709 yyerror("illegal tos value %s", $1);
3710 free($1);
3711 YYERROR;
3712 }
3713 free($1);
3714 }
3715 | NUMBER {
3716 $$ = $1;
3717 if ($$ < 0 || $$ > 255) {
3718 yyerror("illegal tos value %s", $1);
3719 YYERROR;
3720 }
3721 }
3722 ;
3723
3724 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; }
3725 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; }
3726 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; }
3727 ;
3728
3729 statelock : IFBOUND {
3730 $$ = PFRULE_IFBOUND;
3731 }
3732 | FLOATING {
3733 $$ = 0;
3734 }
3735 ;
3736
3737 keep : NO STATE {
3738 $$.action = 0;
3739 $$.options = NULL;
3740 }
3741 | KEEP STATE state_opt_spec {
3742 $$.action = PF_STATE_NORMAL;
3743 $$.options = $3;
3744 }
3745 | MODULATE STATE state_opt_spec {
3746 $$.action = PF_STATE_MODULATE;
3747 $$.options = $3;
3748 }
3749 | SYNPROXY STATE state_opt_spec {
3750 $$.action = PF_STATE_SYNPROXY;
3751 $$.options = $3;
3752 }
3753 ;
3754
3755 flush : /* empty */ { $$ = 0; }
3756 | FLUSH { $$ = PF_FLUSH; }
3757 | FLUSH GLOBAL {
3758 $$ = PF_FLUSH | PF_FLUSH_GLOBAL;
3759 }
3760 ;
3761
3762 state_opt_spec : '(' state_opt_list ')' { $$ = $2; }
3763 | /* empty */ { $$ = NULL; }
3764 ;
3765
3766 state_opt_list : state_opt_item { $$ = $1; }
3767 | state_opt_list comma state_opt_item {
3768 $1->tail->next = $3;
3769 $1->tail = $3;
3770 $$ = $1;
3771 }
3772 ;
3773
3774 state_opt_item : MAXIMUM NUMBER {
3775 if ($2 < 0 || $2 > UINT_MAX) {
3776 yyerror("only positive values permitted");
3777 YYERROR;
3778 }
3779 $$ = calloc(1, sizeof(struct node_state_opt));
3780 if ($$ == NULL)
3781 err(1, "state_opt_item: calloc");
3782 $$->type = PF_STATE_OPT_MAX;
3783 $$->data.max_states = $2;
3784 $$->next = NULL;
3785 $$->tail = $$;
3786 }
3787 | NOSYNC {
3788 $$ = calloc(1, sizeof(struct node_state_opt));
3789 if ($$ == NULL)
3790 err(1, "state_opt_item: calloc");
3791 $$->type = PF_STATE_OPT_NOSYNC;
3792 $$->next = NULL;
3793 $$->tail = $$;
3794 }
3795 | MAXSRCSTATES NUMBER {
3796 if ($2 < 0 || $2 > UINT_MAX) {
3797 yyerror("only positive values permitted");
3798 YYERROR;
3799 }
3800 $$ = calloc(1, sizeof(struct node_state_opt));
3801 if ($$ == NULL)
3802 err(1, "state_opt_item: calloc");
3803 $$->type = PF_STATE_OPT_MAX_SRC_STATES;
3804 $$->data.max_src_states = $2;
3805 $$->next = NULL;
3806 $$->tail = $$;
3807 }
3808 | MAXSRCCONN NUMBER {
3809 if ($2 < 0 || $2 > UINT_MAX) {
3810 yyerror("only positive values permitted");
3811 YYERROR;
3812 }
3813 $$ = calloc(1, sizeof(struct node_state_opt));
3814 if ($$ == NULL)
3815 err(1, "state_opt_item: calloc");
3816 $$->type = PF_STATE_OPT_MAX_SRC_CONN;
3817 $$->data.max_src_conn = $2;
3818 $$->next = NULL;
3819 $$->tail = $$;
3820 }
3821 | MAXSRCCONNRATE NUMBER '/' NUMBER {
3822 if ($2 < 0 || $2 > UINT_MAX ||
3823 $4 < 0 || $4 > UINT_MAX) {
3824 yyerror("only positive values permitted");
3825 YYERROR;
3826 }
3827 $$ = calloc(1, sizeof(struct node_state_opt));
3828 if ($$ == NULL)
3829 err(1, "state_opt_item: calloc");
3830 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
3831 $$->data.max_src_conn_rate.limit = $2;
3832 $$->data.max_src_conn_rate.seconds = $4;
3833 $$->next = NULL;
3834 $$->tail = $$;
3835 }
3836 | OVERLOAD '<' STRING '>' flush {
3837 if (strlen($3) >= PF_TABLE_NAME_SIZE) {
3838 yyerror("table name '%s' too long", $3);
3839 free($3);
3840 YYERROR;
3841 }
3842 $$ = calloc(1, sizeof(struct node_state_opt));
3843 if ($$ == NULL)
3844 err(1, "state_opt_item: calloc");
3845 if (strlcpy($$->data.overload.tblname, $3,
3846 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
3847 errx(1, "state_opt_item: strlcpy");
3848 free($3);
3849 $$->type = PF_STATE_OPT_OVERLOAD;
3850 $$->data.overload.flush = $5;
3851 $$->next = NULL;
3852 $$->tail = $$;
3853 }
3854 | MAXSRCNODES NUMBER {
3855 if ($2 < 0 || $2 > UINT_MAX) {
3856 yyerror("only positive values permitted");
3857 YYERROR;
3858 }
3859 $$ = calloc(1, sizeof(struct node_state_opt));
3860 if ($$ == NULL)
3861 err(1, "state_opt_item: calloc");
3862 $$->type = PF_STATE_OPT_MAX_SRC_NODES;
3863 $$->data.max_src_nodes = $2;
3864 $$->next = NULL;
3865 $$->tail = $$;
3866 }
3867 | sourcetrack {
3868 $$ = calloc(1, sizeof(struct node_state_opt));
3869 if ($$ == NULL)
3870 err(1, "state_opt_item: calloc");
3871 $$->type = PF_STATE_OPT_SRCTRACK;
3872 $$->data.src_track = $1;
3873 $$->next = NULL;
3874 $$->tail = $$;
3875 }
3876 | statelock {
3877 $$ = calloc(1, sizeof(struct node_state_opt));
3878 if ($$ == NULL)
3879 err(1, "state_opt_item: calloc");
3880 $$->type = PF_STATE_OPT_STATELOCK;
3881 $$->data.statelock = $1;
3882 $$->next = NULL;
3883 $$->tail = $$;
3884 }
3885 | SLOPPY {
3886 $$ = calloc(1, sizeof(struct node_state_opt));
3887 if ($$ == NULL)
3888 err(1, "state_opt_item: calloc");
3889 $$->type = PF_STATE_OPT_SLOPPY;
3890 $$->next = NULL;
3891 $$->tail = $$;
3892 }
3893 | STRING NUMBER {
3894 int i;
3895
3896 if ($2 < 0 || $2 > UINT_MAX) {
3897 yyerror("only positive values permitted");
3898 YYERROR;
3899 }
3900 for (i = 0; pf_timeouts[i].name &&
3901 strcmp(pf_timeouts[i].name, $1); ++i)
3902 ; /* nothing */
3903 if (!pf_timeouts[i].name) {
3904 yyerror("illegal timeout name %s", $1);
3905 free($1);
3906 YYERROR;
3907 }
3908 if (strchr(pf_timeouts[i].name, '.') == NULL) {
3909 yyerror("illegal state timeout %s", $1);
3910 free($1);
3911 YYERROR;
3912 }
3913 free($1);
3914 $$ = calloc(1, sizeof(struct node_state_opt));
3915 if ($$ == NULL)
3916 err(1, "state_opt_item: calloc");
3917 $$->type = PF_STATE_OPT_TIMEOUT;
3918 $$->data.timeout.number = pf_timeouts[i].timeout;
3919 $$->data.timeout.seconds = $2;
3920 $$->next = NULL;
3921 $$->tail = $$;
3922 }
3923 ;
3924
3925 label : LABEL STRING {
3926 $$ = $2;
3927 }
3928 ;
3929
3930 qname : QUEUE STRING {
3931 $$.qname = $2;
3932 $$.pqname = NULL;
3933 }
3934 | QUEUE '(' STRING ')' {
3935 $$.qname = $3;
3936 $$.pqname = NULL;
3937 }
3938 | QUEUE '(' STRING comma STRING ')' {
3939 $$.qname = $3;
3940 $$.pqname = $5;
3941 }
3942 ;
3943
3944 no : /* empty */ { $$ = 0; }
3945 | NO { $$ = 1; }
3946 ;
3947
3948 portstar : numberstring {
3949 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
3950 free($1);
3951 YYERROR;
3952 }
3953 free($1);
3954 }
3955 ;
3956
3957 redirspec : host { $$ = $1; }
3958 | '{' optnl redir_host_list '}' { $$ = $3; }
3959 ;
3960
3961 redir_host_list : host optnl { $$ = $1; }
3962 | redir_host_list comma host optnl {
3963 $1->tail->next = $3;
3964 $1->tail = $3->tail;
3965 $$ = $1;
3966 }
3967 ;
3968
3969 redirpool : /* empty */ { $$ = NULL; }
3970 | ARROW redirspec {
3971 $$ = calloc(1, sizeof(struct redirection));
3972 if ($$ == NULL)
3973 err(1, "redirection: calloc");
3974 $$->host = $2;
3975 $$->rport.a = $$->rport.b = $$->rport.t = 0;
3976 }
3977 | ARROW redirspec PORT portstar {
3978 $$ = calloc(1, sizeof(struct redirection));
3979 if ($$ == NULL)
3980 err(1, "redirection: calloc");
3981 $$->host = $2;
3982 $$->rport = $4;
3983 }
3984 ;
3985
3986 hashkey : /* empty */
3987 {
3988 $$ = calloc(1, sizeof(struct pf_poolhashkey));
3989 if ($$ == NULL)
3990 err(1, "hashkey: calloc");
3991 $$->key32[0] = arc4random();
3992 $$->key32[1] = arc4random();
3993 $$->key32[2] = arc4random();
3994 $$->key32[3] = arc4random();
3995 }
3996 | string
3997 {
3998 if (!strncmp($1, "0x", 2)) {
3999 if (strlen($1) != 34) {
4000 free($1);
4001 yyerror("hex key must be 128 bits "
4002 "(32 hex digits) long");
4003 YYERROR;
4004 }
4005 $$ = calloc(1, sizeof(struct pf_poolhashkey));
4006 if ($$ == NULL)
4007 err(1, "hashkey: calloc");
4008
4009 if (sscanf($1, "0x%8x%8x%8x%8x",
4010 &$$->key32[0], &$$->key32[1],
4011 &$$->key32[2], &$$->key32[3]) != 4) {
4012 free($$);
4013 free($1);
4014 yyerror("invalid hex key");
4015 YYERROR;
4016 }
4017 } else {
4018 MD5_CTX context;
4019
4020 $$ = calloc(1, sizeof(struct pf_poolhashkey));
4021 if ($$ == NULL)
4022 err(1, "hashkey: calloc");
4023 MD5Init(&context);
4024 MD5Update(&context, (unsigned char *)$1,
4025 strlen($1));
4026 MD5Final((unsigned char *)$$, &context);
4027 HTONL($$->key32[0]);
4028 HTONL($$->key32[1]);
4029 HTONL($$->key32[2]);
4030 HTONL($$->key32[3]);
4031 }
4032 free($1);
4033 }
4034 ;
4035
4036 pool_opts : { bzero(&pool_opts, sizeof pool_opts); }
4037 pool_opts_l
4038 { $$ = pool_opts; }
4039 | /* empty */ {
4040 bzero(&pool_opts, sizeof pool_opts);
4041 $$ = pool_opts;
4042 }
4043 ;
4044
4045 pool_opts_l : pool_opts_l pool_opt
4046 | pool_opt
4047 ;
4048
4049 pool_opt : BITMASK {
4050 if (pool_opts.type) {
4051 yyerror("pool type cannot be redefined");
4052 YYERROR;
4053 }
4054 pool_opts.type = PF_POOL_BITMASK;
4055 }
4056 | RANDOM {
4057 if (pool_opts.type) {
4058 yyerror("pool type cannot be redefined");
4059 YYERROR;
4060 }
4061 pool_opts.type = PF_POOL_RANDOM;
4062 }
4063 | SOURCEHASH hashkey {
4064 if (pool_opts.type) {
4065 yyerror("pool type cannot be redefined");
4066 YYERROR;
4067 }
4068 pool_opts.type = PF_POOL_SRCHASH;
4069 pool_opts.key = $2;
4070 }
4071 | ROUNDROBIN {
4072 if (pool_opts.type) {
4073 yyerror("pool type cannot be redefined");
4074 YYERROR;
4075 }
4076 pool_opts.type = PF_POOL_ROUNDROBIN;
4077 }
4078 | STATICPORT {
4079 if (pool_opts.staticport) {
4080 yyerror("static-port cannot be redefined");
4081 YYERROR;
4082 }
4083 pool_opts.staticport = 1;
4084 }
4085 | STICKYADDRESS {
4086 if (filter_opts.marker & POM_STICKYADDRESS) {
4087 yyerror("sticky-address cannot be redefined");
4088 YYERROR;
4089 }
4090 pool_opts.marker |= POM_STICKYADDRESS;
4091 pool_opts.opts |= PF_POOL_STICKYADDR;
4092 }
4093 | MAPEPORTSET number '/' number '/' number {
4094 if (pool_opts.mape.offset) {
4095 yyerror("map-e-portset cannot be redefined");
4096 YYERROR;
4097 }
4098 if (pool_opts.type) {
4099 yyerror("map-e-portset cannot be used with "
4100 "address pools");
4101 YYERROR;
4102 }
4103 if ($2 <= 0 || $2 >= 16) {
4104 yyerror("MAP-E PSID offset must be 1-15");
4105 YYERROR;
4106 }
4107 if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) {
4108 yyerror("Invalid MAP-E PSID length");
4109 YYERROR;
4110 } else if ($4 == 0) {
4111 yyerror("PSID Length = 0: this means"
4112 " you do not need MAP-E");
4113 YYERROR;
4114 }
4115 if ($6 < 0 || $6 > 65535) {
4116 yyerror("Invalid MAP-E PSID");
4117 YYERROR;
4118 }
4119 pool_opts.mape.offset = $2;
4120 pool_opts.mape.psidlen = $4;
4121 pool_opts.mape.psid = $6;
4122 }
4123 ;
4124
4125 redirection : /* empty */ { $$ = NULL; }
4126 | ARROW host {
4127 $$ = calloc(1, sizeof(struct redirection));
4128 if ($$ == NULL)
4129 err(1, "redirection: calloc");
4130 $$->host = $2;
4131 $$->rport.a = $$->rport.b = $$->rport.t = 0;
4132 }
4133 | ARROW host PORT portstar {
4134 $$ = calloc(1, sizeof(struct redirection));
4135 if ($$ == NULL)
4136 err(1, "redirection: calloc");
4137 $$->host = $2;
4138 $$->rport = $4;
4139 }
4140 ;
4141
4142 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; }
4143 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
4144 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
4145 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
4146 ;
4147
4148 nataction : no NAT natpasslog {
4149 if ($1 && $3.b1) {
4150 yyerror("\"pass\" not valid with \"no\"");
4151 YYERROR;
4152 }
4153 if ($1)
4154 $$.b1 = PF_NONAT;
4155 else
4156 $$.b1 = PF_NAT;
4157 $$.b2 = $3.b1;
4158 $$.w = $3.b2;
4159 $$.w2 = $3.w2;
4160 }
4161 | no RDR natpasslog {
4162 if ($1 && $3.b1) {
4163 yyerror("\"pass\" not valid with \"no\"");
4164 YYERROR;
4165 }
4166 if ($1)
4167 $$.b1 = PF_NORDR;
4168 else
4169 $$.b1 = PF_RDR;
4170 $$.b2 = $3.b1;
4171 $$.w = $3.b2;
4172 $$.w2 = $3.w2;
4173 }
4174 ;
4175
4176 natrule : nataction interface af proto fromto tag tagged rtable
4177 redirpool pool_opts
4178 {
4179 struct pfctl_rule r;
4180
4181 if (check_rulestate(PFCTL_STATE_NAT))
4182 YYERROR;
4183
4184 memset(&r, 0, sizeof(r));
4185
4186 r.action = $1.b1;
4187 r.natpass = $1.b2;
4188 r.log = $1.w;
4189 r.logif = $1.w2;
4190 r.af = $3;
4191
4192 if (!r.af) {
4193 if ($5.src.host && $5.src.host->af &&
4194 !$5.src.host->ifindex)
4195 r.af = $5.src.host->af;
4196 else if ($5.dst.host && $5.dst.host->af &&
4197 !$5.dst.host->ifindex)
4198 r.af = $5.dst.host->af;
4199 }
4200
4201 if ($6 != NULL)
4202 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
4203 PF_TAG_NAME_SIZE) {
4204 yyerror("tag too long, max %u chars",
4205 PF_TAG_NAME_SIZE - 1);
4206 YYERROR;
4207 }
4208
4209 if ($7.name)
4210 if (strlcpy(r.match_tagname, $7.name,
4211 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4212 yyerror("tag too long, max %u chars",
4213 PF_TAG_NAME_SIZE - 1);
4214 YYERROR;
4215 }
4216 r.match_tag_not = $7.neg;
4217 r.rtableid = $8;
4218
4219 if (r.action == PF_NONAT || r.action == PF_NORDR) {
4220 if ($9 != NULL) {
4221 yyerror("translation rule with 'no' "
4222 "does not need '->'");
4223 YYERROR;
4224 }
4225 } else {
4226 if ($9 == NULL || $9->host == NULL) {
4227 yyerror("translation rule requires '-> "
4228 "address'");
4229 YYERROR;
4230 }
4231 if (!r.af && ! $9->host->ifindex)
4232 r.af = $9->host->af;
4233
4234 remove_invalid_hosts(&$9->host, &r.af);
4235 if (invalid_redirect($9->host, r.af))
4236 YYERROR;
4237 if (check_netmask($9->host, r.af))
4238 YYERROR;
4239
4240 r.rpool.proxy_port[0] = ntohs($9->rport.a);
4241
4242 switch (r.action) {
4243 case PF_RDR:
4244 if (!$9->rport.b && $9->rport.t &&
4245 $5.dst.port != NULL) {
4246 r.rpool.proxy_port[1] =
4247 ntohs($9->rport.a) +
4248 (ntohs(
4249 $5.dst.port->port[1]) -
4250 ntohs(
4251 $5.dst.port->port[0]));
4252 } else
4253 r.rpool.proxy_port[1] =
4254 ntohs($9->rport.b);
4255 break;
4256 case PF_NAT:
4257 r.rpool.proxy_port[1] =
4258 ntohs($9->rport.b);
4259 if (!r.rpool.proxy_port[0] &&
4260 !r.rpool.proxy_port[1]) {
4261 r.rpool.proxy_port[0] =
4262 PF_NAT_PROXY_PORT_LOW;
4263 r.rpool.proxy_port[1] =
4264 PF_NAT_PROXY_PORT_HIGH;
4265 } else if (!r.rpool.proxy_port[1])
4266 r.rpool.proxy_port[1] =
4267 r.rpool.proxy_port[0];
4268 break;
4269 default:
4270 break;
4271 }
4272
4273 r.rpool.opts = $10.type;
4274 if ((r.rpool.opts & PF_POOL_TYPEMASK) ==
4275 PF_POOL_NONE && ($9->host->next != NULL ||
4276 $9->host->addr.type == PF_ADDR_TABLE ||
4277 DYNIF_MULTIADDR($9->host->addr)))
4278 r.rpool.opts = PF_POOL_ROUNDROBIN;
4279 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4280 PF_POOL_ROUNDROBIN &&
4281 disallow_table($9->host, "tables are only "
4282 "supported in round-robin redirection "
4283 "pools"))
4284 YYERROR;
4285 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4286 PF_POOL_ROUNDROBIN &&
4287 disallow_alias($9->host, "interface (%s) "
4288 "is only supported in round-robin "
4289 "redirection pools"))
4290 YYERROR;
4291 if ($9->host->next != NULL) {
4292 if ((r.rpool.opts & PF_POOL_TYPEMASK) !=
4293 PF_POOL_ROUNDROBIN) {
4294 yyerror("only round-robin "
4295 "valid for multiple "
4296 "redirection addresses");
4297 YYERROR;
4298 }
4299 }
4300 }
4301
4302 if ($10.key != NULL)
4303 memcpy(&r.rpool.key, $10.key,
4304 sizeof(struct pf_poolhashkey));
4305
4306 if ($10.opts)
4307 r.rpool.opts |= $10.opts;
4308
4309 if ($10.staticport) {
4310 if (r.action != PF_NAT) {
4311 yyerror("the 'static-port' option is "
4312 "only valid with nat rules");
4313 YYERROR;
4314 }
4315 if (r.rpool.proxy_port[0] !=
4316 PF_NAT_PROXY_PORT_LOW &&
4317 r.rpool.proxy_port[1] !=
4318 PF_NAT_PROXY_PORT_HIGH) {
4319 yyerror("the 'static-port' option can't"
4320 " be used when specifying a port"
4321 " range");
4322 YYERROR;
4323 }
4324 r.rpool.proxy_port[0] = 0;
4325 r.rpool.proxy_port[1] = 0;
4326 }
4327
4328 if ($10.mape.offset) {
4329 if (r.action != PF_NAT) {
4330 yyerror("the 'map-e-portset' option is"
4331 " only valid with nat rules");
4332 YYERROR;
4333 }
4334 if ($10.staticport) {
4335 yyerror("the 'map-e-portset' option"
4336 " can't be used 'static-port'");
4337 YYERROR;
4338 }
4339 if (r.rpool.proxy_port[0] !=
4340 PF_NAT_PROXY_PORT_LOW &&
4341 r.rpool.proxy_port[1] !=
4342 PF_NAT_PROXY_PORT_HIGH) {
4343 yyerror("the 'map-e-portset' option"
4344 " can't be used when specifying"
4345 " a port range");
4346 YYERROR;
4347 }
4348 r.rpool.mape = $10.mape;
4349 }
4350
4351 expand_rule(&r, $2, $9 == NULL ? NULL : $9->host, $4,
4352 $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
4353 $5.dst.port, 0, 0, 0, "");
4354 free($9);
4355 }
4356 ;
4357
4358 binatrule : no BINAT natpasslog interface af proto FROM ipspec toipspec tag
4359 tagged rtable redirection
4360 {
4361 struct pfctl_rule binat;
4362 struct pf_pooladdr *pa;
4363
4364 if (check_rulestate(PFCTL_STATE_NAT))
4365 YYERROR;
4366 if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
4367 "permitted as a binat destination"))
4368 YYERROR;
4369
4370 memset(&binat, 0, sizeof(binat));
4371
4372 if ($1 && $3.b1) {
4373 yyerror("\"pass\" not valid with \"no\"");
4374 YYERROR;
4375 }
4376 if ($1)
4377 binat.action = PF_NOBINAT;
4378 else
4379 binat.action = PF_BINAT;
4380 binat.natpass = $3.b1;
4381 binat.log = $3.b2;
4382 binat.logif = $3.w2;
4383 binat.af = $5;
4384 if (!binat.af && $8 != NULL && $8->af)
4385 binat.af = $8->af;
4386 if (!binat.af && $9 != NULL && $9->af)
4387 binat.af = $9->af;
4388
4389 if (!binat.af && $13 != NULL && $13->host)
4390 binat.af = $13->host->af;
4391 if (!binat.af) {
4392 yyerror("address family (inet/inet6) "
4393 "undefined");
4394 YYERROR;
4395 }
4396
4397 if ($4 != NULL) {
4398 memcpy(binat.ifname, $4->ifname,
4399 sizeof(binat.ifname));
4400 binat.ifnot = $4->not;
4401 free($4);
4402 }
4403
4404 if ($10 != NULL)
4405 if (strlcpy(binat.tagname, $10,
4406 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4407 yyerror("tag too long, max %u chars",
4408 PF_TAG_NAME_SIZE - 1);
4409 YYERROR;
4410 }
4411 if ($11.name)
4412 if (strlcpy(binat.match_tagname, $11.name,
4413 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4414 yyerror("tag too long, max %u chars",
4415 PF_TAG_NAME_SIZE - 1);
4416 YYERROR;
4417 }
4418 binat.match_tag_not = $11.neg;
4419 binat.rtableid = $12;
4420
4421 if ($6 != NULL) {
4422 binat.proto = $6->proto;
4423 free($6);
4424 }
4425
4426 if ($8 != NULL && disallow_table($8, "invalid use of "
4427 "table <%s> as the source address of a binat rule"))
4428 YYERROR;
4429 if ($8 != NULL && disallow_alias($8, "invalid use of "
4430 "interface (%s) as the source address of a binat "
4431 "rule"))
4432 YYERROR;
4433 if ($13 != NULL && $13->host != NULL && disallow_table(
4434 $13->host, "invalid use of table <%s> as the "
4435 "redirect address of a binat rule"))
4436 YYERROR;
4437 if ($13 != NULL && $13->host != NULL && disallow_alias(
4438 $13->host, "invalid use of interface (%s) as the "
4439 "redirect address of a binat rule"))
4440 YYERROR;
4441
4442 if ($8 != NULL) {
4443 if ($8->next) {
4444 yyerror("multiple binat ip addresses");
4445 YYERROR;
4446 }
4447 if ($8->addr.type == PF_ADDR_DYNIFTL)
4448 $8->af = binat.af;
4449 if ($8->af != binat.af) {
4450 yyerror("binat ip versions must match");
4451 YYERROR;
4452 }
4453 if (check_netmask($8, binat.af))
4454 YYERROR;
4455 memcpy(&binat.src.addr, &$8->addr,
4456 sizeof(binat.src.addr));
4457 free($8);
4458 }
4459 if ($9 != NULL) {
4460 if ($9->next) {
4461 yyerror("multiple binat ip addresses");
4462 YYERROR;
4463 }
4464 if ($9->af != binat.af && $9->af) {
4465 yyerror("binat ip versions must match");
4466 YYERROR;
4467 }
4468 if (check_netmask($9, binat.af))
4469 YYERROR;
4470 memcpy(&binat.dst.addr, &$9->addr,
4471 sizeof(binat.dst.addr));
4472 binat.dst.neg = $9->not;
4473 free($9);
4474 }
4475
4476 if (binat.action == PF_NOBINAT) {
4477 if ($13 != NULL) {
4478 yyerror("'no binat' rule does not need"
4479 " '->'");
4480 YYERROR;
4481 }
4482 } else {
4483 if ($13 == NULL || $13->host == NULL) {
4484 yyerror("'binat' rule requires"
4485 " '-> address'");
4486 YYERROR;
4487 }
4488
4489 remove_invalid_hosts(&$13->host, &binat.af);
4490 if (invalid_redirect($13->host, binat.af))
4491 YYERROR;
4492 if ($13->host->next != NULL) {
4493 yyerror("binat rule must redirect to "
4494 "a single address");
4495 YYERROR;
4496 }
4497 if (check_netmask($13->host, binat.af))
4498 YYERROR;
4499
4500 if (!PF_AZERO(&binat.src.addr.v.a.mask,
4501 binat.af) &&
4502 !PF_AEQ(&binat.src.addr.v.a.mask,
4503 &$13->host->addr.v.a.mask, binat.af)) {
4504 yyerror("'binat' source mask and "
4505 "redirect mask must be the same");
4506 YYERROR;
4507 }
4508
4509 TAILQ_INIT(&binat.rpool.list);
4510 pa = calloc(1, sizeof(struct pf_pooladdr));
4511 if (pa == NULL)
4512 err(1, "binat: calloc");
4513 pa->addr = $13->host->addr;
4514 pa->ifname[0] = 0;
4515 TAILQ_INSERT_TAIL(&binat.rpool.list,
4516 pa, entries);
4517
4518 free($13);
4519 }
4520
4521 pfctl_append_rule(pf, &binat, "");
4522 }
4523 ;
4524
4525 tag : /* empty */ { $$ = NULL; }
4526 | TAG STRING { $$ = $2; }
4527 ;
4528
4529 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; }
4530 | not TAGGED string { $$.neg = $1; $$.name = $3; }
4531 ;
4532
4533 rtable : /* empty */ { $$ = -1; }
4534 | RTABLE NUMBER {
4535 if ($2 < 0 || $2 > rt_tableid_max()) {
4536 yyerror("invalid rtable id");
4537 YYERROR;
4538 }
4539 $$ = $2;
4540 }
4541 ;
4542
4543 route_host : STRING {
4544 $$ = calloc(1, sizeof(struct node_host));
4545 if ($$ == NULL)
4546 err(1, "route_host: calloc");
4547 if (strlen($1) >= IFNAMSIZ) {
4548 yyerror("interface name too long");
4549 YYERROR;
4550 }
4551 $$->ifname = strdup($1);
4552 set_ipmask($$, 128);
4553 $$->next = NULL;
4554 $$->tail = $$;
4555 }
4556 | '(' STRING host ')' {
4557 struct node_host *n;
4558
4559 $$ = $3;
4560 for (n = $3; n != NULL; n = n->next) {
4561 if (strlen($2) >= IFNAMSIZ) {
4562 yyerror("interface name too long");
4563 YYERROR;
4564 }
4565 n->ifname = strdup($2);
4566 }
4567 }
4568 ;
4569
4570 route_host_list : route_host optnl { $$ = $1; }
4571 | route_host_list comma route_host optnl {
4572 if ($1->af == 0)
4573 $1->af = $3->af;
4574 if ($1->af != $3->af) {
4575 yyerror("all pool addresses must be in the "
4576 "same address family");
4577 YYERROR;
4578 }
4579 $1->tail->next = $3;
4580 $1->tail = $3->tail;
4581 $$ = $1;
4582 }
4583 ;
4584
4585 routespec : route_host { $$ = $1; }
4586 | '{' optnl route_host_list '}' { $$ = $3; }
4587 ;
4588
4589 route : /* empty */ {
4590 $$.host = NULL;
4591 $$.rt = 0;
4592 $$.pool_opts = 0;
4593 }
4594 | FASTROUTE {
4595 /* backwards-compat */
4596 $$.host = NULL;
4597 $$.rt = 0;
4598 $$.pool_opts = 0;
4599 }
4600 | ROUTETO routespec pool_opts {
4601 $$.host = $2;
4602 $$.rt = PF_ROUTETO;
4603 $$.pool_opts = $3.type | $3.opts;
4604 if ($3.key != NULL)
4605 $$.key = $3.key;
4606 }
4607 | REPLYTO routespec pool_opts {
4608 $$.host = $2;
4609 $$.rt = PF_REPLYTO;
4610 $$.pool_opts = $3.type | $3.opts;
4611 if ($3.key != NULL)
4612 $$.key = $3.key;
4613 }
4614 | DUPTO routespec pool_opts {
4615 $$.host = $2;
4616 $$.rt = PF_DUPTO;
4617 $$.pool_opts = $3.type | $3.opts;
4618 if ($3.key != NULL)
4619 $$.key = $3.key;
4620 }
4621 ;
4622
4623 timeout_spec : STRING NUMBER
4624 {
4625 if (check_rulestate(PFCTL_STATE_OPTION)) {
4626 free($1);
4627 YYERROR;
4628 }
4629 if ($2 < 0 || $2 > UINT_MAX) {
4630 yyerror("only positive values permitted");
4631 YYERROR;
4632 }
4633 if (pfctl_set_timeout(pf, $1, $2, 0) != 0) {
4634 yyerror("unknown timeout %s", $1);
4635 free($1);
4636 YYERROR;
4637 }
4638 free($1);
4639 }
4640 | INTERVAL NUMBER {
4641 if (check_rulestate(PFCTL_STATE_OPTION))
4642 YYERROR;
4643 if ($2 < 0 || $2 > UINT_MAX) {
4644 yyerror("only positive values permitted");
4645 YYERROR;
4646 }
4647 if (pfctl_set_timeout(pf, "interval", $2, 0) != 0)
4648 YYERROR;
4649 }
4650 ;
4651
4652 timeout_list : timeout_list comma timeout_spec optnl
4653 | timeout_spec optnl
4654 ;
4655
4656 limit_spec : STRING NUMBER
4657 {
4658 if (check_rulestate(PFCTL_STATE_OPTION)) {
4659 free($1);
4660 YYERROR;
4661 }
4662 if ($2 < 0 || $2 > UINT_MAX) {
4663 yyerror("only positive values permitted");
4664 YYERROR;
4665 }
4666 if (pfctl_set_limit(pf, $1, $2) != 0) {
4667 yyerror("unable to set limit %s %u", $1, $2);
4668 free($1);
4669 YYERROR;
4670 }
4671 free($1);
4672 }
4673 ;
4674
4675 limit_list : limit_list comma limit_spec optnl
4676 | limit_spec optnl
4677 ;
4678
4679 comma : ','
4680 | /* empty */
4681 ;
4682
4683 yesno : NO { $$ = 0; }
4684 | STRING {
4685 if (!strcmp($1, "yes"))
4686 $$ = 1;
4687 else {
4688 yyerror("invalid value '%s', expected 'yes' "
4689 "or 'no'", $1);
4690 free($1);
4691 YYERROR;
4692 }
4693 free($1);
4694 }
4695 ;
4696
4697 unaryop : '=' { $$ = PF_OP_EQ; }
4698 | '!' '=' { $$ = PF_OP_NE; }
4699 | '<' '=' { $$ = PF_OP_LE; }
4700 | '<' { $$ = PF_OP_LT; }
4701 | '>' '=' { $$ = PF_OP_GE; }
4702 | '>' { $$ = PF_OP_GT; }
4703 ;
4704
4705 %%
4706
4707 int
4708 yyerror(const char *fmt, ...)
4709 {
4710 va_list ap;
4711
4712 file->errors++;
4713 va_start(ap, fmt);
4714 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
4715 vfprintf(stderr, fmt, ap);
4716 fprintf(stderr, "\n");
4717 va_end(ap);
4718 return (0);
4719 }
4720
4721 int
disallow_table(struct node_host * h,const char * fmt)4722 disallow_table(struct node_host *h, const char *fmt)
4723 {
4724 for (; h != NULL; h = h->next)
4725 if (h->addr.type == PF_ADDR_TABLE) {
4726 yyerror(fmt, h->addr.v.tblname);
4727 return (1);
4728 }
4729 return (0);
4730 }
4731
4732 int
disallow_urpf_failed(struct node_host * h,const char * fmt)4733 disallow_urpf_failed(struct node_host *h, const char *fmt)
4734 {
4735 for (; h != NULL; h = h->next)
4736 if (h->addr.type == PF_ADDR_URPFFAILED) {
4737 yyerror(fmt);
4738 return (1);
4739 }
4740 return (0);
4741 }
4742
4743 int
disallow_alias(struct node_host * h,const char * fmt)4744 disallow_alias(struct node_host *h, const char *fmt)
4745 {
4746 for (; h != NULL; h = h->next)
4747 if (DYNIF_MULTIADDR(h->addr)) {
4748 yyerror(fmt, h->addr.v.tblname);
4749 return (1);
4750 }
4751 return (0);
4752 }
4753
4754 int
rule_consistent(struct pfctl_rule * r,int anchor_call)4755 rule_consistent(struct pfctl_rule *r, int anchor_call)
4756 {
4757 int problems = 0;
4758
4759 switch (r->action) {
4760 case PF_PASS:
4761 case PF_DROP:
4762 case PF_SCRUB:
4763 case PF_NOSCRUB:
4764 problems = filter_consistent(r, anchor_call);
4765 break;
4766 case PF_NAT:
4767 case PF_NONAT:
4768 problems = nat_consistent(r);
4769 break;
4770 case PF_RDR:
4771 case PF_NORDR:
4772 problems = rdr_consistent(r);
4773 break;
4774 case PF_BINAT:
4775 case PF_NOBINAT:
4776 default:
4777 break;
4778 }
4779 return (problems);
4780 }
4781
4782 int
filter_consistent(struct pfctl_rule * r,int anchor_call)4783 filter_consistent(struct pfctl_rule *r, int anchor_call)
4784 {
4785 int problems = 0;
4786
4787 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
4788 (r->src.port_op || r->dst.port_op)) {
4789 yyerror("port only applies to tcp/udp");
4790 problems++;
4791 }
4792 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
4793 (r->type || r->code)) {
4794 yyerror("icmp-type/code only applies to icmp");
4795 problems++;
4796 }
4797 if (!r->af && (r->type || r->code)) {
4798 yyerror("must indicate address family with icmp-type/code");
4799 problems++;
4800 }
4801 if (r->overload_tblname[0] &&
4802 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
4803 yyerror("'overload' requires 'max-src-conn' "
4804 "or 'max-src-conn-rate'");
4805 problems++;
4806 }
4807 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
4808 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
4809 yyerror("proto %s doesn't match address family %s",
4810 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
4811 r->af == AF_INET ? "inet" : "inet6");
4812 problems++;
4813 }
4814 if (r->allow_opts && r->action != PF_PASS) {
4815 yyerror("allow-opts can only be specified for pass rules");
4816 problems++;
4817 }
4818 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
4819 r->dst.port_op || r->flagset || r->type || r->code)) {
4820 yyerror("fragments can be filtered only on IP header fields");
4821 problems++;
4822 }
4823 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
4824 yyerror("return-rst can only be applied to TCP rules");
4825 problems++;
4826 }
4827 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
4828 yyerror("max-src-nodes requires 'source-track rule'");
4829 problems++;
4830 }
4831 if (r->action == PF_DROP && r->keep_state) {
4832 yyerror("keep state on block rules doesn't make sense");
4833 problems++;
4834 }
4835 if (r->rule_flag & PFRULE_STATESLOPPY &&
4836 (r->keep_state == PF_STATE_MODULATE ||
4837 r->keep_state == PF_STATE_SYNPROXY)) {
4838 yyerror("sloppy state matching cannot be used with "
4839 "synproxy state or modulate state");
4840 problems++;
4841 }
4842 return (-problems);
4843 }
4844
4845 int
nat_consistent(struct pfctl_rule * r)4846 nat_consistent(struct pfctl_rule *r)
4847 {
4848 return (0); /* yeah! */
4849 }
4850
4851 int
rdr_consistent(struct pfctl_rule * r)4852 rdr_consistent(struct pfctl_rule *r)
4853 {
4854 int problems = 0;
4855
4856 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP) {
4857 if (r->src.port_op) {
4858 yyerror("src port only applies to tcp/udp");
4859 problems++;
4860 }
4861 if (r->dst.port_op) {
4862 yyerror("dst port only applies to tcp/udp");
4863 problems++;
4864 }
4865 if (r->rpool.proxy_port[0]) {
4866 yyerror("rpool port only applies to tcp/udp");
4867 problems++;
4868 }
4869 }
4870 if (r->dst.port_op &&
4871 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
4872 yyerror("invalid port operator for rdr destination port");
4873 problems++;
4874 }
4875 return (-problems);
4876 }
4877
4878 int
process_tabledef(char * name,struct table_opts * opts)4879 process_tabledef(char *name, struct table_opts *opts)
4880 {
4881 struct pfr_buffer ab;
4882 struct node_tinit *ti;
4883 unsigned long maxcount;
4884 size_t s = sizeof(maxcount);
4885
4886 bzero(&ab, sizeof(ab));
4887 ab.pfrb_type = PFRB_ADDRS;
4888 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
4889 if (ti->file)
4890 if (pfr_buf_load(&ab, ti->file, 0, append_addr)) {
4891 if (errno)
4892 yyerror("cannot load \"%s\": %s",
4893 ti->file, strerror(errno));
4894 else
4895 yyerror("file \"%s\" contains bad data",
4896 ti->file);
4897 goto _error;
4898 }
4899 if (ti->host)
4900 if (append_addr_host(&ab, ti->host, 0, 0)) {
4901 yyerror("cannot create address buffer: %s",
4902 strerror(errno));
4903 goto _error;
4904 }
4905 }
4906 if (pf->opts & PF_OPT_VERBOSE)
4907 print_tabledef(name, opts->flags, opts->init_addr,
4908 &opts->init_nodes);
4909 if (!(pf->opts & PF_OPT_NOACTION) &&
4910 pfctl_define_table(name, opts->flags, opts->init_addr,
4911 pf->anchor->name, &ab, pf->anchor->ruleset.tticket)) {
4912
4913 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s,
4914 NULL, 0) == -1)
4915 maxcount = 65535;
4916
4917 if (ab.pfrb_size > maxcount)
4918 yyerror("cannot define table %s: too many elements.\n"
4919 "Consider increasing net.pf.request_maxcount.",
4920 name);
4921 else
4922 yyerror("cannot define table %s: %s", name,
4923 pfr_strerror(errno));
4924
4925 goto _error;
4926 }
4927 pf->tdirty = 1;
4928 pfr_buf_clear(&ab);
4929 return (0);
4930 _error:
4931 pfr_buf_clear(&ab);
4932 return (-1);
4933 }
4934
4935 struct keywords {
4936 const char *k_name;
4937 int k_val;
4938 };
4939
4940 /* macro gore, but you should've seen the prior indentation nightmare... */
4941
4942 #define FREE_LIST(T,r) \
4943 do { \
4944 T *p, *node = r; \
4945 while (node != NULL) { \
4946 p = node; \
4947 node = node->next; \
4948 free(p); \
4949 } \
4950 } while (0)
4951
4952 #define LOOP_THROUGH(T,n,r,C) \
4953 do { \
4954 T *n; \
4955 if (r == NULL) { \
4956 r = calloc(1, sizeof(T)); \
4957 if (r == NULL) \
4958 err(1, "LOOP: calloc"); \
4959 r->next = NULL; \
4960 } \
4961 n = r; \
4962 while (n != NULL) { \
4963 do { \
4964 C; \
4965 } while (0); \
4966 n = n->next; \
4967 } \
4968 } while (0)
4969
4970 void
expand_label_str(char * label,size_t len,const char * srch,const char * repl)4971 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
4972 {
4973 char *tmp;
4974 char *p, *q;
4975
4976 if ((tmp = calloc(1, len)) == NULL)
4977 err(1, "expand_label_str: calloc");
4978 p = q = label;
4979 while ((q = strstr(p, srch)) != NULL) {
4980 *q = '\0';
4981 if ((strlcat(tmp, p, len) >= len) ||
4982 (strlcat(tmp, repl, len) >= len))
4983 errx(1, "expand_label: label too long");
4984 q += strlen(srch);
4985 p = q;
4986 }
4987 if (strlcat(tmp, p, len) >= len)
4988 errx(1, "expand_label: label too long");
4989 strlcpy(label, tmp, len); /* always fits */
4990 free(tmp);
4991 }
4992
4993 void
expand_label_if(const char * name,char * label,size_t len,const char * ifname)4994 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
4995 {
4996 if (strstr(label, name) != NULL) {
4997 if (!*ifname)
4998 expand_label_str(label, len, name, "any");
4999 else
5000 expand_label_str(label, len, name, ifname);
5001 }
5002 }
5003
5004 void
expand_label_addr(const char * name,char * label,size_t len,sa_family_t af,struct pf_rule_addr * addr)5005 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
5006 struct pf_rule_addr *addr)
5007 {
5008 char tmp[64], tmp_not[66];
5009
5010 if (strstr(label, name) != NULL) {
5011 switch (addr->addr.type) {
5012 case PF_ADDR_DYNIFTL:
5013 snprintf(tmp, sizeof(tmp), "(%s)", addr->addr.v.ifname);
5014 break;
5015 case PF_ADDR_TABLE:
5016 snprintf(tmp, sizeof(tmp), "<%s>", addr->addr.v.tblname);
5017 break;
5018 case PF_ADDR_NOROUTE:
5019 snprintf(tmp, sizeof(tmp), "no-route");
5020 break;
5021 case PF_ADDR_URPFFAILED:
5022 snprintf(tmp, sizeof(tmp), "urpf-failed");
5023 break;
5024 case PF_ADDR_ADDRMASK:
5025 if (!af || (PF_AZERO(&addr->addr.v.a.addr, af) &&
5026 PF_AZERO(&addr->addr.v.a.mask, af)))
5027 snprintf(tmp, sizeof(tmp), "any");
5028 else {
5029 char a[48];
5030 int bits;
5031
5032 if (inet_ntop(af, &addr->addr.v.a.addr, a,
5033 sizeof(a)) == NULL)
5034 snprintf(tmp, sizeof(tmp), "?");
5035 else {
5036 bits = unmask(&addr->addr.v.a.mask, af);
5037 if ((af == AF_INET && bits < 32) ||
5038 (af == AF_INET6 && bits < 128))
5039 snprintf(tmp, sizeof(tmp),
5040 "%s/%d", a, bits);
5041 else
5042 snprintf(tmp, sizeof(tmp),
5043 "%s", a);
5044 }
5045 }
5046 break;
5047 default:
5048 snprintf(tmp, sizeof(tmp), "?");
5049 break;
5050 }
5051
5052 if (addr->neg) {
5053 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
5054 expand_label_str(label, len, name, tmp_not);
5055 } else
5056 expand_label_str(label, len, name, tmp);
5057 }
5058 }
5059
5060 void
expand_label_port(const char * name,char * label,size_t len,struct pf_rule_addr * addr)5061 expand_label_port(const char *name, char *label, size_t len,
5062 struct pf_rule_addr *addr)
5063 {
5064 char a1[6], a2[6], op[13] = "";
5065
5066 if (strstr(label, name) != NULL) {
5067 snprintf(a1, sizeof(a1), "%u", ntohs(addr->port[0]));
5068 snprintf(a2, sizeof(a2), "%u", ntohs(addr->port[1]));
5069 if (!addr->port_op)
5070 ;
5071 else if (addr->port_op == PF_OP_IRG)
5072 snprintf(op, sizeof(op), "%s><%s", a1, a2);
5073 else if (addr->port_op == PF_OP_XRG)
5074 snprintf(op, sizeof(op), "%s<>%s", a1, a2);
5075 else if (addr->port_op == PF_OP_EQ)
5076 snprintf(op, sizeof(op), "%s", a1);
5077 else if (addr->port_op == PF_OP_NE)
5078 snprintf(op, sizeof(op), "!=%s", a1);
5079 else if (addr->port_op == PF_OP_LT)
5080 snprintf(op, sizeof(op), "<%s", a1);
5081 else if (addr->port_op == PF_OP_LE)
5082 snprintf(op, sizeof(op), "<=%s", a1);
5083 else if (addr->port_op == PF_OP_GT)
5084 snprintf(op, sizeof(op), ">%s", a1);
5085 else if (addr->port_op == PF_OP_GE)
5086 snprintf(op, sizeof(op), ">=%s", a1);
5087 expand_label_str(label, len, name, op);
5088 }
5089 }
5090
5091 void
expand_label_proto(const char * name,char * label,size_t len,u_int8_t proto)5092 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
5093 {
5094 const char *protoname;
5095 char n[4];
5096
5097 if (strstr(label, name) != NULL) {
5098 protoname = pfctl_proto2name(proto);
5099 if (protoname != NULL)
5100 expand_label_str(label, len, name, protoname);
5101 else {
5102 snprintf(n, sizeof(n), "%u", proto);
5103 expand_label_str(label, len, name, n);
5104 }
5105 }
5106 }
5107
5108 void
expand_label_nr(const char * name,char * label,size_t len,struct pfctl_rule * r)5109 expand_label_nr(const char *name, char *label, size_t len,
5110 struct pfctl_rule *r)
5111 {
5112 char n[11];
5113
5114 if (strstr(label, name) != NULL) {
5115 snprintf(n, sizeof(n), "%u", r->nr);
5116 expand_label_str(label, len, name, n);
5117 }
5118 }
5119
5120 void
expand_label(char * label,size_t len,struct pfctl_rule * r)5121 expand_label(char *label, size_t len, struct pfctl_rule *r)
5122 {
5123 expand_label_if("$if", label, len, r->ifname);
5124 expand_label_addr("$srcaddr", label, len, r->af, &r->src);
5125 expand_label_addr("$dstaddr", label, len, r->af, &r->dst);
5126 expand_label_port("$srcport", label, len, &r->src);
5127 expand_label_port("$dstport", label, len, &r->dst);
5128 expand_label_proto("$proto", label, len, r->proto);
5129 expand_label_nr("$nr", label, len, r);
5130 }
5131
5132 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)5133 expand_altq(struct pf_altq *a, struct node_if *interfaces,
5134 struct node_queue *nqueues, struct node_queue_bw bwspec,
5135 struct node_queue_opt *opts)
5136 {
5137 struct pf_altq pa, pb;
5138 char qname[PF_QNAME_SIZE];
5139 struct node_queue *n;
5140 struct node_queue_bw bw;
5141 int errs = 0;
5142
5143 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
5144 FREE_LIST(struct node_if, interfaces);
5145 if (nqueues)
5146 FREE_LIST(struct node_queue, nqueues);
5147 return (0);
5148 }
5149
5150 LOOP_THROUGH(struct node_if, interface, interfaces,
5151 memcpy(&pa, a, sizeof(struct pf_altq));
5152 if (strlcpy(pa.ifname, interface->ifname,
5153 sizeof(pa.ifname)) >= sizeof(pa.ifname))
5154 errx(1, "expand_altq: strlcpy");
5155
5156 if (interface->not) {
5157 yyerror("altq on ! <interface> is not supported");
5158 errs++;
5159 } else {
5160 if (eval_pfaltq(pf, &pa, &bwspec, opts))
5161 errs++;
5162 else
5163 if (pfctl_add_altq(pf, &pa))
5164 errs++;
5165
5166 if (pf->opts & PF_OPT_VERBOSE) {
5167 print_altq(&pf->paltq->altq, 0,
5168 &bwspec, opts);
5169 if (nqueues && nqueues->tail) {
5170 printf("queue { ");
5171 LOOP_THROUGH(struct node_queue, queue,
5172 nqueues,
5173 printf("%s ",
5174 queue->queue);
5175 );
5176 printf("}");
5177 }
5178 printf("\n");
5179 }
5180
5181 if (pa.scheduler == ALTQT_CBQ ||
5182 pa.scheduler == ALTQT_HFSC ||
5183 pa.scheduler == ALTQT_FAIRQ) {
5184 /* now create a root queue */
5185 memset(&pb, 0, sizeof(struct pf_altq));
5186 if (strlcpy(qname, "root_", sizeof(qname)) >=
5187 sizeof(qname))
5188 errx(1, "expand_altq: strlcpy");
5189 if (strlcat(qname, interface->ifname,
5190 sizeof(qname)) >= sizeof(qname))
5191 errx(1, "expand_altq: strlcat");
5192 if (strlcpy(pb.qname, qname,
5193 sizeof(pb.qname)) >= sizeof(pb.qname))
5194 errx(1, "expand_altq: strlcpy");
5195 if (strlcpy(pb.ifname, interface->ifname,
5196 sizeof(pb.ifname)) >= sizeof(pb.ifname))
5197 errx(1, "expand_altq: strlcpy");
5198 pb.qlimit = pa.qlimit;
5199 pb.scheduler = pa.scheduler;
5200 bw.bw_absolute = pa.ifbandwidth;
5201 bw.bw_percent = 0;
5202 if (eval_pfqueue(pf, &pb, &bw, opts))
5203 errs++;
5204 else
5205 if (pfctl_add_altq(pf, &pb))
5206 errs++;
5207 }
5208
5209 LOOP_THROUGH(struct node_queue, queue, nqueues,
5210 n = calloc(1, sizeof(struct node_queue));
5211 if (n == NULL)
5212 err(1, "expand_altq: calloc");
5213 if (pa.scheduler == ALTQT_CBQ ||
5214 pa.scheduler == ALTQT_HFSC ||
5215 pa.scheduler == ALTQT_FAIRQ)
5216 if (strlcpy(n->parent, qname,
5217 sizeof(n->parent)) >=
5218 sizeof(n->parent))
5219 errx(1, "expand_altq: strlcpy");
5220 if (strlcpy(n->queue, queue->queue,
5221 sizeof(n->queue)) >= sizeof(n->queue))
5222 errx(1, "expand_altq: strlcpy");
5223 if (strlcpy(n->ifname, interface->ifname,
5224 sizeof(n->ifname)) >= sizeof(n->ifname))
5225 errx(1, "expand_altq: strlcpy");
5226 n->scheduler = pa.scheduler;
5227 n->next = NULL;
5228 n->tail = n;
5229 if (queues == NULL)
5230 queues = n;
5231 else {
5232 queues->tail->next = n;
5233 queues->tail = n;
5234 }
5235 );
5236 }
5237 );
5238 FREE_LIST(struct node_if, interfaces);
5239 if (nqueues)
5240 FREE_LIST(struct node_queue, nqueues);
5241
5242 return (errs);
5243 }
5244
5245 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)5246 expand_queue(struct pf_altq *a, struct node_if *interfaces,
5247 struct node_queue *nqueues, struct node_queue_bw bwspec,
5248 struct node_queue_opt *opts)
5249 {
5250 struct node_queue *n, *nq;
5251 struct pf_altq pa;
5252 u_int8_t found = 0;
5253 u_int8_t errs = 0;
5254
5255 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
5256 FREE_LIST(struct node_queue, nqueues);
5257 return (0);
5258 }
5259
5260 if (queues == NULL) {
5261 yyerror("queue %s has no parent", a->qname);
5262 FREE_LIST(struct node_queue, nqueues);
5263 return (1);
5264 }
5265
5266 LOOP_THROUGH(struct node_if, interface, interfaces,
5267 LOOP_THROUGH(struct node_queue, tqueue, queues,
5268 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
5269 (interface->ifname[0] == 0 ||
5270 (!interface->not && !strncmp(interface->ifname,
5271 tqueue->ifname, IFNAMSIZ)) ||
5272 (interface->not && strncmp(interface->ifname,
5273 tqueue->ifname, IFNAMSIZ)))) {
5274 /* found ourself in queues */
5275 found++;
5276
5277 memcpy(&pa, a, sizeof(struct pf_altq));
5278
5279 if (pa.scheduler != ALTQT_NONE &&
5280 pa.scheduler != tqueue->scheduler) {
5281 yyerror("exactly one scheduler type "
5282 "per interface allowed");
5283 return (1);
5284 }
5285 pa.scheduler = tqueue->scheduler;
5286
5287 /* scheduler dependent error checking */
5288 switch (pa.scheduler) {
5289 case ALTQT_PRIQ:
5290 if (nqueues != NULL) {
5291 yyerror("priq queues cannot "
5292 "have child queues");
5293 return (1);
5294 }
5295 if (bwspec.bw_absolute > 0 ||
5296 bwspec.bw_percent < 100) {
5297 yyerror("priq doesn't take "
5298 "bandwidth");
5299 return (1);
5300 }
5301 break;
5302 default:
5303 break;
5304 }
5305
5306 if (strlcpy(pa.ifname, tqueue->ifname,
5307 sizeof(pa.ifname)) >= sizeof(pa.ifname))
5308 errx(1, "expand_queue: strlcpy");
5309 if (strlcpy(pa.parent, tqueue->parent,
5310 sizeof(pa.parent)) >= sizeof(pa.parent))
5311 errx(1, "expand_queue: strlcpy");
5312
5313 if (eval_pfqueue(pf, &pa, &bwspec, opts))
5314 errs++;
5315 else
5316 if (pfctl_add_altq(pf, &pa))
5317 errs++;
5318
5319 for (nq = nqueues; nq != NULL; nq = nq->next) {
5320 if (!strcmp(a->qname, nq->queue)) {
5321 yyerror("queue cannot have "
5322 "itself as child");
5323 errs++;
5324 continue;
5325 }
5326 n = calloc(1,
5327 sizeof(struct node_queue));
5328 if (n == NULL)
5329 err(1, "expand_queue: calloc");
5330 if (strlcpy(n->parent, a->qname,
5331 sizeof(n->parent)) >=
5332 sizeof(n->parent))
5333 errx(1, "expand_queue strlcpy");
5334 if (strlcpy(n->queue, nq->queue,
5335 sizeof(n->queue)) >=
5336 sizeof(n->queue))
5337 errx(1, "expand_queue strlcpy");
5338 if (strlcpy(n->ifname, tqueue->ifname,
5339 sizeof(n->ifname)) >=
5340 sizeof(n->ifname))
5341 errx(1, "expand_queue strlcpy");
5342 n->scheduler = tqueue->scheduler;
5343 n->next = NULL;
5344 n->tail = n;
5345 if (queues == NULL)
5346 queues = n;
5347 else {
5348 queues->tail->next = n;
5349 queues->tail = n;
5350 }
5351 }
5352 if ((pf->opts & PF_OPT_VERBOSE) && (
5353 (found == 1 && interface->ifname[0] == 0) ||
5354 (found > 0 && interface->ifname[0] != 0))) {
5355 print_queue(&pf->paltq->altq, 0,
5356 &bwspec, interface->ifname[0] != 0,
5357 opts);
5358 if (nqueues && nqueues->tail) {
5359 printf("{ ");
5360 LOOP_THROUGH(struct node_queue,
5361 queue, nqueues,
5362 printf("%s ",
5363 queue->queue);
5364 );
5365 printf("}");
5366 }
5367 printf("\n");
5368 }
5369 }
5370 );
5371 );
5372
5373 FREE_LIST(struct node_queue, nqueues);
5374 FREE_LIST(struct node_if, interfaces);
5375
5376 if (!found) {
5377 yyerror("queue %s has no parent", a->qname);
5378 errs++;
5379 }
5380
5381 if (errs)
5382 return (1);
5383 else
5384 return (0);
5385 }
5386
5387 void
expand_rule(struct pfctl_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)5388 expand_rule(struct pfctl_rule *r,
5389 struct node_if *interfaces, struct node_host *rpool_hosts,
5390 struct node_proto *protos, struct node_os *src_oses,
5391 struct node_host *src_hosts, struct node_port *src_ports,
5392 struct node_host *dst_hosts, struct node_port *dst_ports,
5393 struct node_uid *uids, struct node_gid *gids, struct node_icmp *icmp_types,
5394 const char *anchor_call)
5395 {
5396 sa_family_t af = r->af;
5397 int added = 0, error = 0;
5398 char ifname[IF_NAMESIZE];
5399 char label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE];
5400 char tagname[PF_TAG_NAME_SIZE];
5401 char match_tagname[PF_TAG_NAME_SIZE];
5402 struct pf_pooladdr *pa;
5403 struct node_host *h;
5404 u_int8_t flags, flagset, keep_state;
5405
5406 memcpy(label, r->label, sizeof(r->label));
5407 assert(sizeof(r->label) == sizeof(label));
5408 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
5409 errx(1, "expand_rule: strlcpy");
5410 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
5411 sizeof(match_tagname))
5412 errx(1, "expand_rule: strlcpy");
5413 flags = r->flags;
5414 flagset = r->flagset;
5415 keep_state = r->keep_state;
5416
5417 LOOP_THROUGH(struct node_if, interface, interfaces,
5418 LOOP_THROUGH(struct node_proto, proto, protos,
5419 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
5420 LOOP_THROUGH(struct node_host, src_host, src_hosts,
5421 LOOP_THROUGH(struct node_port, src_port, src_ports,
5422 LOOP_THROUGH(struct node_os, src_os, src_oses,
5423 LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
5424 LOOP_THROUGH(struct node_port, dst_port, dst_ports,
5425 LOOP_THROUGH(struct node_uid, uid, uids,
5426 LOOP_THROUGH(struct node_gid, gid, gids,
5427
5428 r->af = af;
5429 /* for link-local IPv6 address, interface must match up */
5430 if ((r->af && src_host->af && r->af != src_host->af) ||
5431 (r->af && dst_host->af && r->af != dst_host->af) ||
5432 (src_host->af && dst_host->af &&
5433 src_host->af != dst_host->af) ||
5434 (src_host->ifindex && dst_host->ifindex &&
5435 src_host->ifindex != dst_host->ifindex) ||
5436 (src_host->ifindex && *interface->ifname &&
5437 src_host->ifindex != if_nametoindex(interface->ifname)) ||
5438 (dst_host->ifindex && *interface->ifname &&
5439 dst_host->ifindex != if_nametoindex(interface->ifname)))
5440 continue;
5441 if (!r->af && src_host->af)
5442 r->af = src_host->af;
5443 else if (!r->af && dst_host->af)
5444 r->af = dst_host->af;
5445
5446 if (*interface->ifname)
5447 strlcpy(r->ifname, interface->ifname,
5448 sizeof(r->ifname));
5449 else if (if_indextoname(src_host->ifindex, ifname))
5450 strlcpy(r->ifname, ifname, sizeof(r->ifname));
5451 else if (if_indextoname(dst_host->ifindex, ifname))
5452 strlcpy(r->ifname, ifname, sizeof(r->ifname));
5453 else
5454 memset(r->ifname, '\0', sizeof(r->ifname));
5455
5456 memcpy(r->label, label, sizeof(r->label));
5457 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
5458 sizeof(r->tagname))
5459 errx(1, "expand_rule: strlcpy");
5460 if (strlcpy(r->match_tagname, match_tagname,
5461 sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
5462 errx(1, "expand_rule: strlcpy");
5463
5464 error += check_netmask(src_host, r->af);
5465 error += check_netmask(dst_host, r->af);
5466
5467 r->ifnot = interface->not;
5468 r->proto = proto->proto;
5469 r->src.addr = src_host->addr;
5470 r->src.neg = src_host->not;
5471 r->src.port[0] = src_port->port[0];
5472 r->src.port[1] = src_port->port[1];
5473 r->src.port_op = src_port->op;
5474 r->dst.addr = dst_host->addr;
5475 r->dst.neg = dst_host->not;
5476 r->dst.port[0] = dst_port->port[0];
5477 r->dst.port[1] = dst_port->port[1];
5478 r->dst.port_op = dst_port->op;
5479 r->uid.op = uid->op;
5480 r->uid.uid[0] = uid->uid[0];
5481 r->uid.uid[1] = uid->uid[1];
5482 r->gid.op = gid->op;
5483 r->gid.gid[0] = gid->gid[0];
5484 r->gid.gid[1] = gid->gid[1];
5485 r->type = icmp_type->type;
5486 r->code = icmp_type->code;
5487
5488 if ((keep_state == PF_STATE_MODULATE ||
5489 keep_state == PF_STATE_SYNPROXY) &&
5490 r->proto && r->proto != IPPROTO_TCP)
5491 r->keep_state = PF_STATE_NORMAL;
5492 else
5493 r->keep_state = keep_state;
5494
5495 if (r->proto && r->proto != IPPROTO_TCP) {
5496 r->flags = 0;
5497 r->flagset = 0;
5498 } else {
5499 r->flags = flags;
5500 r->flagset = flagset;
5501 }
5502 if (icmp_type->proto && r->proto != icmp_type->proto) {
5503 yyerror("icmp-type mismatch");
5504 error++;
5505 }
5506
5507 if (src_os && src_os->os) {
5508 r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
5509 if ((pf->opts & PF_OPT_VERBOSE2) &&
5510 r->os_fingerprint == PF_OSFP_NOMATCH)
5511 fprintf(stderr,
5512 "warning: unknown '%s' OS fingerprint\n",
5513 src_os->os);
5514 } else {
5515 r->os_fingerprint = PF_OSFP_ANY;
5516 }
5517
5518 TAILQ_INIT(&r->rpool.list);
5519 for (h = rpool_hosts; h != NULL; h = h->next) {
5520 pa = calloc(1, sizeof(struct pf_pooladdr));
5521 if (pa == NULL)
5522 err(1, "expand_rule: calloc");
5523 pa->addr = h->addr;
5524 if (h->ifname != NULL) {
5525 if (strlcpy(pa->ifname, h->ifname,
5526 sizeof(pa->ifname)) >=
5527 sizeof(pa->ifname))
5528 errx(1, "expand_rule: strlcpy");
5529 } else
5530 pa->ifname[0] = 0;
5531 TAILQ_INSERT_TAIL(&r->rpool.list, pa, entries);
5532 }
5533
5534 if (rule_consistent(r, anchor_call[0]) < 0 || error)
5535 yyerror("skipping rule due to errors");
5536 else {
5537 r->nr = pf->astack[pf->asd]->match++;
5538 pfctl_append_rule(pf, r, anchor_call);
5539 added++;
5540 }
5541
5542 ))))))))));
5543
5544 FREE_LIST(struct node_if, interfaces);
5545 FREE_LIST(struct node_proto, protos);
5546 FREE_LIST(struct node_host, src_hosts);
5547 FREE_LIST(struct node_port, src_ports);
5548 FREE_LIST(struct node_os, src_oses);
5549 FREE_LIST(struct node_host, dst_hosts);
5550 FREE_LIST(struct node_port, dst_ports);
5551 FREE_LIST(struct node_uid, uids);
5552 FREE_LIST(struct node_gid, gids);
5553 FREE_LIST(struct node_icmp, icmp_types);
5554 FREE_LIST(struct node_host, rpool_hosts);
5555
5556 if (!added)
5557 yyerror("rule expands to no valid combination");
5558 }
5559
5560 int
expand_skip_interface(struct node_if * interfaces)5561 expand_skip_interface(struct node_if *interfaces)
5562 {
5563 int errs = 0;
5564
5565 if (!interfaces || (!interfaces->next && !interfaces->not &&
5566 !strcmp(interfaces->ifname, "none"))) {
5567 if (pf->opts & PF_OPT_VERBOSE)
5568 printf("set skip on none\n");
5569 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
5570 return (errs);
5571 }
5572
5573 if (pf->opts & PF_OPT_VERBOSE)
5574 printf("set skip on {");
5575 LOOP_THROUGH(struct node_if, interface, interfaces,
5576 if (pf->opts & PF_OPT_VERBOSE)
5577 printf(" %s", interface->ifname);
5578 if (interface->not) {
5579 yyerror("skip on ! <interface> is not supported");
5580 errs++;
5581 } else
5582 errs += pfctl_set_interface_flags(pf,
5583 interface->ifname, PFI_IFLAG_SKIP, 1);
5584 );
5585 if (pf->opts & PF_OPT_VERBOSE)
5586 printf(" }\n");
5587
5588 FREE_LIST(struct node_if, interfaces);
5589
5590 if (errs)
5591 return (1);
5592 else
5593 return (0);
5594 }
5595
5596 #undef FREE_LIST
5597 #undef LOOP_THROUGH
5598
5599 int
check_rulestate(int desired_state)5600 check_rulestate(int desired_state)
5601 {
5602 if (require_order && (rulestate > desired_state)) {
5603 yyerror("Rules must be in order: options, normalization, "
5604 "queueing, translation, filtering");
5605 return (1);
5606 }
5607 rulestate = desired_state;
5608 return (0);
5609 }
5610
5611 int
kw_cmp(const void * k,const void * e)5612 kw_cmp(const void *k, const void *e)
5613 {
5614 return (strcmp(k, ((const struct keywords *)e)->k_name));
5615 }
5616
5617 int
lookup(char * s)5618 lookup(char *s)
5619 {
5620 /* this has to be sorted always */
5621 static const struct keywords keywords[] = {
5622 { "all", ALL},
5623 { "allow-opts", ALLOWOPTS},
5624 { "altq", ALTQ},
5625 { "anchor", ANCHOR},
5626 { "antispoof", ANTISPOOF},
5627 { "any", ANY},
5628 { "bandwidth", BANDWIDTH},
5629 { "binat", BINAT},
5630 { "binat-anchor", BINATANCHOR},
5631 { "bitmask", BITMASK},
5632 { "block", BLOCK},
5633 { "block-policy", BLOCKPOLICY},
5634 { "buckets", BUCKETS},
5635 { "cbq", CBQ},
5636 { "code", CODE},
5637 { "codelq", CODEL},
5638 { "crop", FRAGCROP},
5639 { "debug", DEBUG},
5640 { "divert-reply", DIVERTREPLY},
5641 { "divert-to", DIVERTTO},
5642 { "drop", DROP},
5643 { "drop-ovl", FRAGDROP},
5644 { "dup-to", DUPTO},
5645 { "fail-policy", FAILPOLICY},
5646 { "fairq", FAIRQ},
5647 { "fastroute", FASTROUTE},
5648 { "file", FILENAME},
5649 { "fingerprints", FINGERPRINTS},
5650 { "flags", FLAGS},
5651 { "floating", FLOATING},
5652 { "flush", FLUSH},
5653 { "for", FOR},
5654 { "fragment", FRAGMENT},
5655 { "from", FROM},
5656 { "global", GLOBAL},
5657 { "group", GROUP},
5658 { "hfsc", HFSC},
5659 { "hogs", HOGS},
5660 { "hostid", HOSTID},
5661 { "icmp-type", ICMPTYPE},
5662 { "icmp6-type", ICMP6TYPE},
5663 { "if-bound", IFBOUND},
5664 { "in", IN},
5665 { "include", INCLUDE},
5666 { "inet", INET},
5667 { "inet6", INET6},
5668 { "interval", INTERVAL},
5669 { "keep", KEEP},
5670 { "keepcounters", KEEPCOUNTERS},
5671 { "label", LABEL},
5672 { "limit", LIMIT},
5673 { "linkshare", LINKSHARE},
5674 { "load", LOAD},
5675 { "log", LOG},
5676 { "loginterface", LOGINTERFACE},
5677 { "map-e-portset", MAPEPORTSET},
5678 { "match", MATCH},
5679 { "max", MAXIMUM},
5680 { "max-mss", MAXMSS},
5681 { "max-src-conn", MAXSRCCONN},
5682 { "max-src-conn-rate", MAXSRCCONNRATE},
5683 { "max-src-nodes", MAXSRCNODES},
5684 { "max-src-states", MAXSRCSTATES},
5685 { "min-ttl", MINTTL},
5686 { "modulate", MODULATE},
5687 { "nat", NAT},
5688 { "nat-anchor", NATANCHOR},
5689 { "no", NO},
5690 { "no-df", NODF},
5691 { "no-route", NOROUTE},
5692 { "no-sync", NOSYNC},
5693 { "on", ON},
5694 { "optimization", OPTIMIZATION},
5695 { "os", OS},
5696 { "out", OUT},
5697 { "overload", OVERLOAD},
5698 { "pass", PASS},
5699 { "port", PORT},
5700 { "prio", PRIO},
5701 { "priority", PRIORITY},
5702 { "priq", PRIQ},
5703 { "probability", PROBABILITY},
5704 { "proto", PROTO},
5705 { "qlimit", QLIMIT},
5706 { "queue", QUEUE},
5707 { "quick", QUICK},
5708 { "random", RANDOM},
5709 { "random-id", RANDOMID},
5710 { "rdr", RDR},
5711 { "rdr-anchor", RDRANCHOR},
5712 { "realtime", REALTIME},
5713 { "reassemble", REASSEMBLE},
5714 { "reply-to", REPLYTO},
5715 { "require-order", REQUIREORDER},
5716 { "return", RETURN},
5717 { "return-icmp", RETURNICMP},
5718 { "return-icmp6", RETURNICMP6},
5719 { "return-rst", RETURNRST},
5720 { "ridentifier", RIDENTIFIER},
5721 { "round-robin", ROUNDROBIN},
5722 { "route", ROUTE},
5723 { "route-to", ROUTETO},
5724 { "rtable", RTABLE},
5725 { "rule", RULE},
5726 { "ruleset-optimization", RULESET_OPTIMIZATION},
5727 { "scrub", SCRUB},
5728 { "set", SET},
5729 { "set-tos", SETTOS},
5730 { "skip", SKIP},
5731 { "sloppy", SLOPPY},
5732 { "source-hash", SOURCEHASH},
5733 { "source-track", SOURCETRACK},
5734 { "state", STATE},
5735 { "state-defaults", STATEDEFAULTS},
5736 { "state-policy", STATEPOLICY},
5737 { "static-port", STATICPORT},
5738 { "sticky-address", STICKYADDRESS},
5739 { "syncookies", SYNCOOKIES},
5740 { "synproxy", SYNPROXY},
5741 { "table", TABLE},
5742 { "tag", TAG},
5743 { "tagged", TAGGED},
5744 { "target", TARGET},
5745 { "tbrsize", TBRSIZE},
5746 { "timeout", TIMEOUT},
5747 { "to", TO},
5748 { "tos", TOS},
5749 { "ttl", TTL},
5750 { "upperlimit", UPPERLIMIT},
5751 { "urpf-failed", URPFFAILED},
5752 { "user", USER},
5753 };
5754 const struct keywords *p;
5755
5756 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
5757 sizeof(keywords[0]), kw_cmp);
5758
5759 if (p) {
5760 if (debug > 1)
5761 fprintf(stderr, "%s: %d\n", s, p->k_val);
5762 return (p->k_val);
5763 } else {
5764 if (debug > 1)
5765 fprintf(stderr, "string: %s\n", s);
5766 return (STRING);
5767 }
5768 }
5769
5770 #define MAXPUSHBACK 128
5771
5772 static char *parsebuf;
5773 static int parseindex;
5774 static char pushback_buffer[MAXPUSHBACK];
5775 static int pushback_index = 0;
5776
5777 int
lgetc(int quotec)5778 lgetc(int quotec)
5779 {
5780 int c, next;
5781
5782 if (parsebuf) {
5783 /* Read character from the parsebuffer instead of input. */
5784 if (parseindex >= 0) {
5785 c = parsebuf[parseindex++];
5786 if (c != '\0')
5787 return (c);
5788 parsebuf = NULL;
5789 } else
5790 parseindex++;
5791 }
5792
5793 if (pushback_index)
5794 return (pushback_buffer[--pushback_index]);
5795
5796 if (quotec) {
5797 if ((c = getc(file->stream)) == EOF) {
5798 yyerror("reached end of file while parsing quoted string");
5799 if (popfile() == EOF)
5800 return (EOF);
5801 return (quotec);
5802 }
5803 return (c);
5804 }
5805
5806 while ((c = getc(file->stream)) == '\\') {
5807 next = getc(file->stream);
5808 if (next != '\n') {
5809 c = next;
5810 break;
5811 }
5812 yylval.lineno = file->lineno;
5813 file->lineno++;
5814 }
5815
5816 while (c == EOF) {
5817 if (popfile() == EOF)
5818 return (EOF);
5819 c = getc(file->stream);
5820 }
5821 return (c);
5822 }
5823
5824 int
lungetc(int c)5825 lungetc(int c)
5826 {
5827 if (c == EOF)
5828 return (EOF);
5829 if (parsebuf) {
5830 parseindex--;
5831 if (parseindex >= 0)
5832 return (c);
5833 }
5834 if (pushback_index < MAXPUSHBACK-1)
5835 return (pushback_buffer[pushback_index++] = c);
5836 else
5837 return (EOF);
5838 }
5839
5840 int
findeol(void)5841 findeol(void)
5842 {
5843 int c;
5844
5845 parsebuf = NULL;
5846
5847 /* skip to either EOF or the first real EOL */
5848 while (1) {
5849 if (pushback_index)
5850 c = pushback_buffer[--pushback_index];
5851 else
5852 c = lgetc(0);
5853 if (c == '\n') {
5854 file->lineno++;
5855 break;
5856 }
5857 if (c == EOF)
5858 break;
5859 }
5860 return (ERROR);
5861 }
5862
5863 int
yylex(void)5864 yylex(void)
5865 {
5866 char buf[8096];
5867 char *p, *val;
5868 int quotec, next, c;
5869 int token;
5870
5871 top:
5872 p = buf;
5873 while ((c = lgetc(0)) == ' ' || c == '\t')
5874 ; /* nothing */
5875
5876 yylval.lineno = file->lineno;
5877 if (c == '#')
5878 while ((c = lgetc(0)) != '\n' && c != EOF)
5879 ; /* nothing */
5880 if (c == '$' && parsebuf == NULL) {
5881 while (1) {
5882 if ((c = lgetc(0)) == EOF)
5883 return (0);
5884
5885 if (p + 1 >= buf + sizeof(buf) - 1) {
5886 yyerror("string too long");
5887 return (findeol());
5888 }
5889 if (isalnum(c) || c == '_') {
5890 *p++ = (char)c;
5891 continue;
5892 }
5893 *p = '\0';
5894 lungetc(c);
5895 break;
5896 }
5897 val = symget(buf);
5898 if (val == NULL) {
5899 yyerror("macro '%s' not defined", buf);
5900 return (findeol());
5901 }
5902 parsebuf = val;
5903 parseindex = 0;
5904 goto top;
5905 }
5906
5907 switch (c) {
5908 case '\'':
5909 case '"':
5910 quotec = c;
5911 while (1) {
5912 if ((c = lgetc(quotec)) == EOF)
5913 return (0);
5914 if (c == '\n') {
5915 file->lineno++;
5916 continue;
5917 } else if (c == '\\') {
5918 if ((next = lgetc(quotec)) == EOF)
5919 return (0);
5920 if (next == quotec || c == ' ' || c == '\t')
5921 c = next;
5922 else if (next == '\n') {
5923 file->lineno++;
5924 continue;
5925 }
5926 else
5927 lungetc(next);
5928 } else if (c == quotec) {
5929 *p = '\0';
5930 break;
5931 }
5932 if (p + 1 >= buf + sizeof(buf) - 1) {
5933 yyerror("string too long");
5934 return (findeol());
5935 }
5936 *p++ = (char)c;
5937 }
5938 yylval.v.string = strdup(buf);
5939 if (yylval.v.string == NULL)
5940 err(1, "yylex: strdup");
5941 return (STRING);
5942 case '<':
5943 next = lgetc(0);
5944 if (next == '>') {
5945 yylval.v.i = PF_OP_XRG;
5946 return (PORTBINARY);
5947 }
5948 lungetc(next);
5949 break;
5950 case '>':
5951 next = lgetc(0);
5952 if (next == '<') {
5953 yylval.v.i = PF_OP_IRG;
5954 return (PORTBINARY);
5955 }
5956 lungetc(next);
5957 break;
5958 case '-':
5959 next = lgetc(0);
5960 if (next == '>')
5961 return (ARROW);
5962 lungetc(next);
5963 break;
5964 }
5965
5966 #define allowed_to_end_number(x) \
5967 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
5968
5969 if (c == '-' || isdigit(c)) {
5970 do {
5971 *p++ = c;
5972 if ((unsigned)(p-buf) >= sizeof(buf)) {
5973 yyerror("string too long");
5974 return (findeol());
5975 }
5976 } while ((c = lgetc(0)) != EOF && isdigit(c));
5977 lungetc(c);
5978 if (p == buf + 1 && buf[0] == '-')
5979 goto nodigits;
5980 if (c == EOF || allowed_to_end_number(c)) {
5981 const char *errstr = NULL;
5982
5983 *p = '\0';
5984 yylval.v.number = strtonum(buf, LLONG_MIN,
5985 LLONG_MAX, &errstr);
5986 if (errstr) {
5987 yyerror("\"%s\" invalid number: %s",
5988 buf, errstr);
5989 return (findeol());
5990 }
5991 return (NUMBER);
5992 } else {
5993 nodigits:
5994 while (p > buf + 1)
5995 lungetc(*--p);
5996 c = *--p;
5997 if (c == '-')
5998 return (c);
5999 }
6000 }
6001
6002 #define allowed_in_string(x) \
6003 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
6004 x != '{' && x != '}' && x != '<' && x != '>' && \
6005 x != '!' && x != '=' && x != '/' && x != '#' && \
6006 x != ','))
6007
6008 if (isalnum(c) || c == ':' || c == '_') {
6009 do {
6010 *p++ = c;
6011 if ((unsigned)(p-buf) >= sizeof(buf)) {
6012 yyerror("string too long");
6013 return (findeol());
6014 }
6015 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
6016 lungetc(c);
6017 *p = '\0';
6018 if ((token = lookup(buf)) == STRING)
6019 if ((yylval.v.string = strdup(buf)) == NULL)
6020 err(1, "yylex: strdup");
6021 return (token);
6022 }
6023 if (c == '\n') {
6024 yylval.lineno = file->lineno;
6025 file->lineno++;
6026 }
6027 if (c == EOF)
6028 return (0);
6029 return (c);
6030 }
6031
6032 int
check_file_secrecy(int fd,const char * fname)6033 check_file_secrecy(int fd, const char *fname)
6034 {
6035 struct stat st;
6036
6037 if (fstat(fd, &st)) {
6038 warn("cannot stat %s", fname);
6039 return (-1);
6040 }
6041 if (st.st_uid != 0 && st.st_uid != getuid()) {
6042 warnx("%s: owner not root or current user", fname);
6043 return (-1);
6044 }
6045 if (st.st_mode & (S_IRWXG | S_IRWXO)) {
6046 warnx("%s: group/world readable/writeable", fname);
6047 return (-1);
6048 }
6049 return (0);
6050 }
6051
6052 struct file *
pushfile(const char * name,int secret)6053 pushfile(const char *name, int secret)
6054 {
6055 struct file *nfile;
6056
6057 if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
6058 (nfile->name = strdup(name)) == NULL) {
6059 warn("malloc");
6060 return (NULL);
6061 }
6062 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
6063 nfile->stream = stdin;
6064 free(nfile->name);
6065 if ((nfile->name = strdup("stdin")) == NULL) {
6066 warn("strdup");
6067 free(nfile);
6068 return (NULL);
6069 }
6070 } else if ((nfile->stream = fopen(nfile->name, "r")) == NULL) {
6071 warn("%s", nfile->name);
6072 free(nfile->name);
6073 free(nfile);
6074 return (NULL);
6075 } else if (secret &&
6076 check_file_secrecy(fileno(nfile->stream), nfile->name)) {
6077 fclose(nfile->stream);
6078 free(nfile->name);
6079 free(nfile);
6080 return (NULL);
6081 }
6082 nfile->lineno = 1;
6083 TAILQ_INSERT_TAIL(&files, nfile, entry);
6084 return (nfile);
6085 }
6086
6087 int
popfile(void)6088 popfile(void)
6089 {
6090 struct file *prev;
6091
6092 if ((prev = TAILQ_PREV(file, files, entry)) != NULL) {
6093 prev->errors += file->errors;
6094 TAILQ_REMOVE(&files, file, entry);
6095 fclose(file->stream);
6096 free(file->name);
6097 free(file);
6098 file = prev;
6099 return (0);
6100 }
6101 return (EOF);
6102 }
6103
6104 int
parse_config(char * filename,struct pfctl * xpf)6105 parse_config(char *filename, struct pfctl *xpf)
6106 {
6107 int errors = 0;
6108 struct sym *sym;
6109
6110 pf = xpf;
6111 errors = 0;
6112 rulestate = PFCTL_STATE_NONE;
6113 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
6114 returnicmp6default =
6115 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
6116 blockpolicy = PFRULE_DROP;
6117 failpolicy = PFRULE_DROP;
6118 require_order = 1;
6119
6120 if ((file = pushfile(filename, 0)) == NULL) {
6121 warn("cannot open the main config file!");
6122 return (-1);
6123 }
6124
6125 yyparse();
6126 errors = file->errors;
6127 popfile();
6128
6129 /* Free macros and check which have not been used. */
6130 while ((sym = TAILQ_FIRST(&symhead))) {
6131 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
6132 fprintf(stderr, "warning: macro '%s' not "
6133 "used\n", sym->nam);
6134 free(sym->nam);
6135 free(sym->val);
6136 TAILQ_REMOVE(&symhead, sym, entry);
6137 free(sym);
6138 }
6139
6140 return (errors ? -1 : 0);
6141 }
6142
6143 int
symset(const char * nam,const char * val,int persist)6144 symset(const char *nam, const char *val, int persist)
6145 {
6146 struct sym *sym;
6147
6148 for (sym = TAILQ_FIRST(&symhead); sym && strcmp(nam, sym->nam);
6149 sym = TAILQ_NEXT(sym, entry))
6150 ; /* nothing */
6151
6152 if (sym != NULL) {
6153 if (sym->persist == 1)
6154 return (0);
6155 else {
6156 free(sym->nam);
6157 free(sym->val);
6158 TAILQ_REMOVE(&symhead, sym, entry);
6159 free(sym);
6160 }
6161 }
6162 if ((sym = calloc(1, sizeof(*sym))) == NULL)
6163 return (-1);
6164
6165 sym->nam = strdup(nam);
6166 if (sym->nam == NULL) {
6167 free(sym);
6168 return (-1);
6169 }
6170 sym->val = strdup(val);
6171 if (sym->val == NULL) {
6172 free(sym->nam);
6173 free(sym);
6174 return (-1);
6175 }
6176 sym->used = 0;
6177 sym->persist = persist;
6178 TAILQ_INSERT_TAIL(&symhead, sym, entry);
6179 return (0);
6180 }
6181
6182 int
pfctl_cmdline_symset(char * s)6183 pfctl_cmdline_symset(char *s)
6184 {
6185 char *sym, *val;
6186 int ret;
6187
6188 if ((val = strrchr(s, '=')) == NULL)
6189 return (-1);
6190
6191 if ((sym = malloc(strlen(s) - strlen(val) + 1)) == NULL)
6192 err(1, "pfctl_cmdline_symset: malloc");
6193
6194 strlcpy(sym, s, strlen(s) - strlen(val) + 1);
6195
6196 ret = symset(sym, val + 1, 1);
6197 free(sym);
6198
6199 return (ret);
6200 }
6201
6202 char *
symget(const char * nam)6203 symget(const char *nam)
6204 {
6205 struct sym *sym;
6206
6207 TAILQ_FOREACH(sym, &symhead, entry)
6208 if (strcmp(nam, sym->nam) == 0) {
6209 sym->used = 1;
6210 return (sym->val);
6211 }
6212 return (NULL);
6213 }
6214
6215 void
mv_rules(struct pfctl_ruleset * src,struct pfctl_ruleset * dst)6216 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst)
6217 {
6218 int i;
6219 struct pfctl_rule *r;
6220
6221 for (i = 0; i < PF_RULESET_MAX; ++i) {
6222 while ((r = TAILQ_FIRST(src->rules[i].active.ptr))
6223 != NULL) {
6224 TAILQ_REMOVE(src->rules[i].active.ptr, r, entries);
6225 TAILQ_INSERT_TAIL(dst->rules[i].active.ptr, r, entries);
6226 dst->anchor->match++;
6227 }
6228 src->anchor->match = 0;
6229 while ((r = TAILQ_FIRST(src->rules[i].inactive.ptr))
6230 != NULL) {
6231 TAILQ_REMOVE(src->rules[i].inactive.ptr, r, entries);
6232 TAILQ_INSERT_TAIL(dst->rules[i].inactive.ptr,
6233 r, entries);
6234 }
6235 }
6236 }
6237
6238 void
decide_address_family(struct node_host * n,sa_family_t * af)6239 decide_address_family(struct node_host *n, sa_family_t *af)
6240 {
6241 if (*af != 0 || n == NULL)
6242 return;
6243 *af = n->af;
6244 while ((n = n->next) != NULL) {
6245 if (n->af != *af) {
6246 *af = 0;
6247 return;
6248 }
6249 }
6250 }
6251
6252 void
remove_invalid_hosts(struct node_host ** nh,sa_family_t * af)6253 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
6254 {
6255 struct node_host *n = *nh, *prev = NULL;
6256
6257 while (n != NULL) {
6258 if (*af && n->af && n->af != *af) {
6259 /* unlink and free n */
6260 struct node_host *next = n->next;
6261
6262 /* adjust tail pointer */
6263 if (n == (*nh)->tail)
6264 (*nh)->tail = prev;
6265 /* adjust previous node's next pointer */
6266 if (prev == NULL)
6267 *nh = next;
6268 else
6269 prev->next = next;
6270 /* free node */
6271 if (n->ifname != NULL)
6272 free(n->ifname);
6273 free(n);
6274 n = next;
6275 } else {
6276 if (n->af && !*af)
6277 *af = n->af;
6278 prev = n;
6279 n = n->next;
6280 }
6281 }
6282 }
6283
6284 int
invalid_redirect(struct node_host * nh,sa_family_t af)6285 invalid_redirect(struct node_host *nh, sa_family_t af)
6286 {
6287 if (!af) {
6288 struct node_host *n;
6289
6290 /* tables and dyniftl are ok without an address family */
6291 for (n = nh; n != NULL; n = n->next) {
6292 if (n->addr.type != PF_ADDR_TABLE &&
6293 n->addr.type != PF_ADDR_DYNIFTL) {
6294 yyerror("address family not given and "
6295 "translation address expands to multiple "
6296 "address families");
6297 return (1);
6298 }
6299 }
6300 }
6301 if (nh == NULL) {
6302 yyerror("no translation address with matching address family "
6303 "found.");
6304 return (1);
6305 }
6306 return (0);
6307 }
6308
6309 int
atoul(char * s,u_long * ulvalp)6310 atoul(char *s, u_long *ulvalp)
6311 {
6312 u_long ulval;
6313 char *ep;
6314
6315 errno = 0;
6316 ulval = strtoul(s, &ep, 0);
6317 if (s[0] == '\0' || *ep != '\0')
6318 return (-1);
6319 if (errno == ERANGE && ulval == ULONG_MAX)
6320 return (-1);
6321 *ulvalp = ulval;
6322 return (0);
6323 }
6324
6325 int
getservice(char * n)6326 getservice(char *n)
6327 {
6328 struct servent *s;
6329 u_long ulval;
6330
6331 if (atoul(n, &ulval) == 0) {
6332 if (ulval > 65535) {
6333 yyerror("illegal port value %lu", ulval);
6334 return (-1);
6335 }
6336 return (htons(ulval));
6337 } else {
6338 s = getservbyname(n, "tcp");
6339 if (s == NULL)
6340 s = getservbyname(n, "udp");
6341 if (s == NULL) {
6342 yyerror("unknown port %s", n);
6343 return (-1);
6344 }
6345 return (s->s_port);
6346 }
6347 }
6348
6349 int
rule_label(struct pfctl_rule * r,char * s[PF_RULE_MAX_LABEL_COUNT])6350 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT])
6351 {
6352 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) {
6353 if (s[i] == NULL)
6354 return (0);
6355
6356 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >=
6357 sizeof(r->label[0])) {
6358 yyerror("rule label too long (max %d chars)",
6359 sizeof(r->label[0])-1);
6360 return (-1);
6361 }
6362 }
6363 return (0);
6364 }
6365
6366 u_int16_t
parseicmpspec(char * w,sa_family_t af)6367 parseicmpspec(char *w, sa_family_t af)
6368 {
6369 const struct icmpcodeent *p;
6370 u_long ulval;
6371 u_int8_t icmptype;
6372
6373 if (af == AF_INET)
6374 icmptype = returnicmpdefault >> 8;
6375 else
6376 icmptype = returnicmp6default >> 8;
6377
6378 if (atoul(w, &ulval) == -1) {
6379 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
6380 yyerror("unknown icmp code %s", w);
6381 return (0);
6382 }
6383 ulval = p->code;
6384 }
6385 if (ulval > 255) {
6386 yyerror("invalid icmp code %lu", ulval);
6387 return (0);
6388 }
6389 return (icmptype << 8 | ulval);
6390 }
6391
6392 int
parseport(char * port,struct range * r,int extensions)6393 parseport(char *port, struct range *r, int extensions)
6394 {
6395 char *p = strchr(port, ':');
6396
6397 if (p == NULL) {
6398 if ((r->a = getservice(port)) == -1)
6399 return (-1);
6400 r->b = 0;
6401 r->t = PF_OP_NONE;
6402 return (0);
6403 }
6404 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
6405 *p = 0;
6406 if ((r->a = getservice(port)) == -1)
6407 return (-1);
6408 r->b = 0;
6409 r->t = PF_OP_IRG;
6410 return (0);
6411 }
6412 if ((extensions & PPORT_RANGE)) {
6413 *p++ = 0;
6414 if ((r->a = getservice(port)) == -1 ||
6415 (r->b = getservice(p)) == -1)
6416 return (-1);
6417 if (r->a == r->b) {
6418 r->b = 0;
6419 r->t = PF_OP_NONE;
6420 } else
6421 r->t = PF_OP_RRG;
6422 return (0);
6423 }
6424 return (-1);
6425 }
6426
6427 int
pfctl_load_anchors(int dev,struct pfctl * pf,struct pfr_buffer * trans)6428 pfctl_load_anchors(int dev, struct pfctl *pf, struct pfr_buffer *trans)
6429 {
6430 struct loadanchors *la;
6431
6432 TAILQ_FOREACH(la, &loadanchorshead, entries) {
6433 if (pf->opts & PF_OPT_VERBOSE)
6434 fprintf(stderr, "\nLoading anchor %s from %s\n",
6435 la->anchorname, la->filename);
6436 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
6437 la->anchorname, trans) == -1)
6438 return (-1);
6439 }
6440
6441 return (0);
6442 }
6443
6444 int
kw_casecmp(const void * k,const void * e)6445 kw_casecmp(const void *k, const void *e)
6446 {
6447 return (strcasecmp(k, ((const struct keywords *)e)->k_name));
6448 }
6449
6450 int
map_tos(char * s,int * val)6451 map_tos(char *s, int *val)
6452 {
6453 /* DiffServ Codepoints and other TOS mappings */
6454 const struct keywords toswords[] = {
6455 { "af11", IPTOS_DSCP_AF11 },
6456 { "af12", IPTOS_DSCP_AF12 },
6457 { "af13", IPTOS_DSCP_AF13 },
6458 { "af21", IPTOS_DSCP_AF21 },
6459 { "af22", IPTOS_DSCP_AF22 },
6460 { "af23", IPTOS_DSCP_AF23 },
6461 { "af31", IPTOS_DSCP_AF31 },
6462 { "af32", IPTOS_DSCP_AF32 },
6463 { "af33", IPTOS_DSCP_AF33 },
6464 { "af41", IPTOS_DSCP_AF41 },
6465 { "af42", IPTOS_DSCP_AF42 },
6466 { "af43", IPTOS_DSCP_AF43 },
6467 { "critical", IPTOS_PREC_CRITIC_ECP },
6468 { "cs0", IPTOS_DSCP_CS0 },
6469 { "cs1", IPTOS_DSCP_CS1 },
6470 { "cs2", IPTOS_DSCP_CS2 },
6471 { "cs3", IPTOS_DSCP_CS3 },
6472 { "cs4", IPTOS_DSCP_CS4 },
6473 { "cs5", IPTOS_DSCP_CS5 },
6474 { "cs6", IPTOS_DSCP_CS6 },
6475 { "cs7", IPTOS_DSCP_CS7 },
6476 { "ef", IPTOS_DSCP_EF },
6477 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
6478 { "lowdelay", IPTOS_LOWDELAY },
6479 { "netcontrol", IPTOS_PREC_NETCONTROL },
6480 { "reliability", IPTOS_RELIABILITY },
6481 { "throughput", IPTOS_THROUGHPUT },
6482 { "va", IPTOS_DSCP_VA }
6483 };
6484 const struct keywords *p;
6485
6486 p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]),
6487 sizeof(toswords[0]), kw_casecmp);
6488
6489 if (p) {
6490 *val = p->k_val;
6491 return (1);
6492 }
6493 return (0);
6494 }
6495
6496 int
rt_tableid_max(void)6497 rt_tableid_max(void)
6498 {
6499 #ifdef __FreeBSD__
6500 int fibs;
6501 size_t l = sizeof(fibs);
6502
6503 if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1)
6504 fibs = 16; /* XXX RT_MAXFIBS, at least limit it some. */
6505 /*
6506 * As the OpenBSD code only compares > and not >= we need to adjust
6507 * here given we only accept values of 0..n and want to avoid #ifdefs
6508 * in the grammar.
6509 */
6510 return (fibs - 1);
6511 #else
6512 return (RT_TABLEID_MAX);
6513 #endif
6514 }
6515