1 /* $OpenBSD: parse.y,v 1.554 2008/10/17 12:59:53 henning Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2001 Markus Friedl. All rights reserved.
7 * Copyright (c) 2001 Daniel Hartmeier. All rights reserved.
8 * Copyright (c) 2001 Theo de Raadt. All rights reserved.
9 * Copyright (c) 2002,2003 Henning Brauer. All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31 %{
32 #include <sys/cdefs.h>
33 #define PFIOC_USE_LATEST
34
35 #include <sys/types.h>
36 #include <sys/socket.h>
37 #include <sys/stat.h>
38 #ifdef __FreeBSD__
39 #include <sys/sysctl.h>
40 #endif
41 #include <net/if.h>
42 #include <netinet/in.h>
43 #include <netinet/in_systm.h>
44 #include <netinet/ip.h>
45 #include <netinet/ip_icmp.h>
46 #include <netinet/icmp6.h>
47 #include <net/pfvar.h>
48 #include <arpa/inet.h>
49 #include <net/altq/altq.h>
50 #include <net/altq/altq_cbq.h>
51 #include <net/altq/altq_codel.h>
52 #include <net/altq/altq_priq.h>
53 #include <net/altq/altq_hfsc.h>
54 #include <net/altq/altq_fairq.h>
55
56 #include <assert.h>
57 #include <stdio.h>
58 #include <unistd.h>
59 #include <stdlib.h>
60 #include <netdb.h>
61 #include <stdarg.h>
62 #include <errno.h>
63 #include <string.h>
64 #include <ctype.h>
65 #include <math.h>
66 #include <err.h>
67 #include <limits.h>
68 #include <pwd.h>
69 #include <grp.h>
70 #include <md5.h>
71
72 #include "pfctl_parser.h"
73 #include "pfctl.h"
74
75 static struct pfctl *pf = NULL;
76 static int debug = 0;
77 static int rulestate = 0;
78 static u_int16_t returnicmpdefault =
79 (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
80 static u_int16_t returnicmp6default =
81 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
82 static int blockpolicy = PFRULE_DROP;
83 static int failpolicy = PFRULE_DROP;
84 static int require_order = 1;
85 static int default_statelock;
86
87 static TAILQ_HEAD(files, file) files = TAILQ_HEAD_INITIALIZER(files);
88 static struct file {
89 TAILQ_ENTRY(file) entry;
90 FILE *stream;
91 char *name;
92 size_t ungetpos;
93 size_t ungetsize;
94 u_char *ungetbuf;
95 int eof_reached;
96 int lineno;
97 int errors;
98 } *file, *topfile;
99 struct file *pushfile(const char *, int);
100 int popfile(void);
101 int check_file_secrecy(int, const char *);
102 int yyparse(void);
103 int yylex(void);
104 int yyerror(const char *, ...);
105 int kw_cmp(const void *, const void *);
106 int lookup(char *);
107 int igetc(void);
108 int lgetc(int);
109 void lungetc(int);
110 int findeol(void);
111
112 static TAILQ_HEAD(symhead, sym) symhead = TAILQ_HEAD_INITIALIZER(symhead);
113 struct sym {
114 TAILQ_ENTRY(sym) entry;
115 int used;
116 int persist;
117 char *nam;
118 char *val;
119 };
120 int symset(const char *, const char *, int);
121 char *symget(const char *);
122
123 int atoul(char *, u_long *);
124
125 enum {
126 PFCTL_STATE_NONE,
127 PFCTL_STATE_OPTION,
128 PFCTL_STATE_ETHER,
129 PFCTL_STATE_SCRUB,
130 PFCTL_STATE_QUEUE,
131 PFCTL_STATE_NAT,
132 PFCTL_STATE_FILTER
133 };
134
135 struct node_etherproto {
136 u_int16_t proto;
137 struct node_etherproto *next;
138 struct node_etherproto *tail;
139 };
140
141 struct node_proto {
142 u_int8_t proto;
143 struct node_proto *next;
144 struct node_proto *tail;
145 };
146
147 struct node_port {
148 u_int16_t port[2];
149 u_int8_t op;
150 struct node_port *next;
151 struct node_port *tail;
152 };
153
154 struct node_uid {
155 uid_t uid[2];
156 u_int8_t op;
157 struct node_uid *next;
158 struct node_uid *tail;
159 };
160
161 struct node_gid {
162 gid_t gid[2];
163 u_int8_t op;
164 struct node_gid *next;
165 struct node_gid *tail;
166 };
167
168 struct node_icmp {
169 uint16_t code;
170 uint16_t type;
171 u_int8_t proto;
172 struct node_icmp *next;
173 struct node_icmp *tail;
174 };
175
176 enum { PF_STATE_OPT_MAX, PF_STATE_OPT_NOSYNC, PF_STATE_OPT_SRCTRACK,
177 PF_STATE_OPT_MAX_SRC_STATES, PF_STATE_OPT_MAX_SRC_CONN,
178 PF_STATE_OPT_MAX_SRC_CONN_RATE, PF_STATE_OPT_MAX_SRC_NODES,
179 PF_STATE_OPT_OVERLOAD, PF_STATE_OPT_STATELOCK,
180 PF_STATE_OPT_TIMEOUT, PF_STATE_OPT_SLOPPY,
181 PF_STATE_OPT_PFLOW, PF_STATE_OPT_ALLOW_RELATED };
182
183 enum { PF_SRCTRACK_NONE, PF_SRCTRACK, PF_SRCTRACK_GLOBAL, PF_SRCTRACK_RULE };
184
185 struct node_state_opt {
186 int type;
187 union {
188 u_int32_t max_states;
189 u_int32_t max_src_states;
190 u_int32_t max_src_conn;
191 struct {
192 u_int32_t limit;
193 u_int32_t seconds;
194 } max_src_conn_rate;
195 struct {
196 u_int8_t flush;
197 char tblname[PF_TABLE_NAME_SIZE];
198 } overload;
199 u_int32_t max_src_nodes;
200 u_int8_t src_track;
201 u_int32_t statelock;
202 struct {
203 int number;
204 u_int32_t seconds;
205 } timeout;
206 } data;
207 struct node_state_opt *next;
208 struct node_state_opt *tail;
209 };
210
211 struct peer {
212 struct node_host *host;
213 struct node_port *port;
214 };
215
216 static struct node_queue {
217 char queue[PF_QNAME_SIZE];
218 char parent[PF_QNAME_SIZE];
219 char ifname[IFNAMSIZ];
220 int scheduler;
221 struct node_queue *next;
222 struct node_queue *tail;
223 } *queues = NULL;
224
225 struct node_qassign {
226 char *qname;
227 char *pqname;
228 };
229
230 struct range {
231 int a;
232 int b;
233 int t;
234 };
235
236 static struct pool_opts {
237 int marker;
238 #define POM_TYPE 0x01
239 #define POM_STICKYADDRESS 0x02
240 #define POM_ENDPI 0x04
241 #define POM_IPV6NH 0x08
242 u_int8_t opts;
243 int type;
244 int staticport;
245 struct pf_poolhashkey *key;
246 struct pf_mape_portset mape;
247 } pool_opts;
248
249 struct redirspec {
250 struct node_host *host;
251 struct range rport;
252 struct pool_opts pool_opts;
253 sa_family_t af;
254 bool binat;
255 };
256
257 static struct filter_opts {
258 int marker;
259 #define FOM_FLAGS 0x0001
260 #define FOM_ICMP 0x0002
261 #define FOM_TOS 0x0004
262 #define FOM_KEEP 0x0008
263 #define FOM_SRCTRACK 0x0010
264 #define FOM_MINTTL 0x0020
265 #define FOM_MAXMSS 0x0040
266 #define FOM_AFTO 0x0080
267 #define FOM_SETTOS 0x0100
268 #define FOM_SCRUB_TCP 0x0200
269 #define FOM_SETPRIO 0x0400
270 #define FOM_ONCE 0x1000 /* not yet implemmented */
271 #define FOM_PRIO 0x2000
272 #define FOM_SETDELAY 0x4000
273 #define FOM_FRAGCACHE 0x8000 /* does not exist in OpenBSD */
274 struct node_uid *uid;
275 struct node_gid *gid;
276 struct node_if *rcv;
277 struct {
278 u_int8_t b1;
279 u_int8_t b2;
280 u_int16_t w;
281 u_int16_t w2;
282 } flags;
283 struct node_icmp *icmpspec;
284 u_int32_t tos;
285 u_int32_t prob;
286 u_int32_t ridentifier;
287 struct {
288 int action;
289 struct node_state_opt *options;
290 } keep;
291 int fragment;
292 int allowopts;
293 char *label[PF_RULE_MAX_LABEL_COUNT];
294 int labelcount;
295 struct node_qassign queues;
296 char *tag;
297 char *match_tag;
298 u_int8_t match_tag_not;
299 u_int16_t dnpipe;
300 u_int16_t dnrpipe;
301 u_int32_t free_flags;
302 u_int rtableid;
303 u_int8_t prio;
304 u_int8_t set_prio[2];
305 struct {
306 struct node_host *addr;
307 u_int16_t port;
308 } divert;
309 struct redirspec *nat;
310 struct redirspec *rdr;
311 /* new-style scrub opts */
312 int nodf;
313 int minttl;
314 int settos;
315 int randomid;
316 int max_mss;
317 struct {
318 uint32_t limit;
319 uint32_t seconds;
320 } pktrate;
321 int max_pkt_size;
322 } filter_opts;
323
324 static struct antispoof_opts {
325 char *label[PF_RULE_MAX_LABEL_COUNT];
326 int labelcount;
327 u_int32_t ridentifier;
328 u_int rtableid;
329 } antispoof_opts;
330
331 static struct scrub_opts {
332 int marker;
333 int nodf;
334 int minttl;
335 int maxmss;
336 int settos;
337 int fragcache;
338 int randomid;
339 int reassemble_tcp;
340 char *match_tag;
341 u_int8_t match_tag_not;
342 u_int rtableid;
343 } scrub_opts;
344
345 static struct queue_opts {
346 int marker;
347 #define QOM_BWSPEC 0x01
348 #define QOM_SCHEDULER 0x02
349 #define QOM_PRIORITY 0x04
350 #define QOM_TBRSIZE 0x08
351 #define QOM_QLIMIT 0x10
352 struct node_queue_bw queue_bwspec;
353 struct node_queue_opt scheduler;
354 int priority;
355 unsigned int tbrsize;
356 int qlimit;
357 } queue_opts;
358
359 static struct table_opts {
360 int flags;
361 int init_addr;
362 struct node_tinithead init_nodes;
363 } table_opts;
364
365 static struct codel_opts codel_opts;
366 static struct node_hfsc_opts hfsc_opts;
367 static struct node_fairq_opts fairq_opts;
368 static struct node_state_opt *keep_state_defaults = NULL;
369 static struct pfctl_watermarks syncookie_opts;
370
371 int validate_range(uint8_t, uint16_t, uint16_t);
372 int disallow_table(struct node_host *, const char *);
373 int disallow_urpf_failed(struct node_host *, const char *);
374 int disallow_alias(struct node_host *, const char *);
375 int rule_consistent(struct pfctl_rule *, int);
376 int filter_consistent(struct pfctl_rule *, int);
377 int nat_consistent(struct pfctl_rule *);
378 int rdr_consistent(struct pfctl_rule *);
379 int process_tabledef(char *, struct table_opts *, int);
380 void expand_label_str(char *, size_t, const char *, const char *);
381 void expand_label_if(const char *, char *, size_t, const char *);
382 void expand_label_addr(const char *, char *, size_t, sa_family_t,
383 struct pf_rule_addr *);
384 void expand_label_port(const char *, char *, size_t,
385 struct pf_rule_addr *);
386 void expand_label_proto(const char *, char *, size_t, u_int8_t);
387 void expand_label_nr(const char *, char *, size_t,
388 struct pfctl_rule *);
389 void expand_eth_rule(struct pfctl_eth_rule *,
390 struct node_if *, struct node_etherproto *,
391 struct node_mac *, struct node_mac *,
392 struct node_host *, struct node_host *, const char *,
393 const char *);
394 int apply_rdr_ports(struct pfctl_rule *r, struct pfctl_pool *, struct redirspec *);
395 int apply_nat_ports(struct pfctl_pool *, struct redirspec *);
396 int apply_redirspec(struct pfctl_pool *, struct redirspec *);
397 int check_binat_redirspec(struct node_host *, struct pfctl_rule *, sa_family_t);
398 void add_binat_rdr_rule(struct pfctl_rule *, struct redirspec *,
399 struct node_host *, struct pfctl_rule *, struct redirspec **,
400 struct node_host **);
401 void expand_rule(struct pfctl_rule *, bool, struct node_if *,
402 struct redirspec *, struct redirspec *, struct redirspec *,
403 struct node_proto *, struct node_os *, struct node_host *,
404 struct node_port *, struct node_host *, struct node_port *,
405 struct node_uid *, struct node_gid *, struct node_if *,
406 struct node_icmp *, const char *);
407 int expand_altq(struct pf_altq *, struct node_if *,
408 struct node_queue *, struct node_queue_bw bwspec,
409 struct node_queue_opt *);
410 int expand_queue(struct pf_altq *, struct node_if *,
411 struct node_queue *, struct node_queue_bw,
412 struct node_queue_opt *);
413 int expand_skip_interface(struct node_if *);
414
415 int check_rulestate(int);
416 int getservice(char *);
417 int rule_label(struct pfctl_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]);
418 int eth_rule_label(struct pfctl_eth_rule *, char *s[PF_RULE_MAX_LABEL_COUNT]);
419 int rt_tableid_max(void);
420
421 void mv_rules(struct pfctl_ruleset *, struct pfctl_ruleset *);
422 void mv_eth_rules(struct pfctl_eth_ruleset *, struct pfctl_eth_ruleset *);
423 void mv_tables(struct pfctl *, struct pfr_ktablehead *,
424 struct pfctl_anchor *, struct pfctl_anchor *);
425 void decide_address_family(struct node_host *, sa_family_t *);
426 void remove_invalid_hosts(struct node_host **, sa_family_t *);
427 int invalid_redirect(struct node_host *, sa_family_t);
428 u_int16_t parseicmpspec(char *, sa_family_t);
429 int kw_casecmp(const void *, const void *);
430 int map_tos(char *string, int *);
431 int filteropts_to_rule(struct pfctl_rule *, struct filter_opts *);
432 struct node_mac* node_mac_from_string(const char *);
433 struct node_mac* node_mac_from_string_masklen(const char *, int);
434 struct node_mac* node_mac_from_string_mask(const char *, const char *);
435
436 static TAILQ_HEAD(loadanchorshead, loadanchors)
437 loadanchorshead = TAILQ_HEAD_INITIALIZER(loadanchorshead);
438
439 struct loadanchors {
440 TAILQ_ENTRY(loadanchors) entries;
441 char *anchorname;
442 char *filename;
443 };
444
445 typedef struct {
446 union {
447 int64_t number;
448 double probability;
449 int i;
450 char *string;
451 u_int rtableid;
452 struct {
453 u_int8_t b1;
454 u_int8_t b2;
455 u_int16_t w;
456 u_int16_t w2;
457 } b;
458 struct range range;
459 struct node_if *interface;
460 struct node_proto *proto;
461 struct node_etherproto *etherproto;
462 struct node_icmp *icmp;
463 struct node_host *host;
464 struct node_os *os;
465 struct node_port *port;
466 struct node_uid *uid;
467 struct node_gid *gid;
468 struct node_state_opt *state_opt;
469 struct peer peer;
470 struct {
471 struct peer src, dst;
472 struct node_os *src_os;
473 } fromto;
474 struct {
475 struct node_mac *src;
476 struct node_mac *dst;
477 } etherfromto;
478 struct node_mac *mac;
479 struct {
480 struct node_mac *mac;
481 } etheraddr;
482 char *bridge_to;
483 struct {
484 struct redirspec *redirspec;
485 u_int8_t rt;
486 } route;
487 struct redirspec *redirspec;
488 struct {
489 int action;
490 struct node_state_opt *options;
491 } keep_state;
492 struct {
493 u_int8_t log;
494 u_int8_t logif;
495 u_int8_t quick;
496 } logquick;
497 struct {
498 int neg;
499 char *name;
500 } tagged;
501 struct pf_poolhashkey *hashkey;
502 struct node_queue *queue;
503 struct node_queue_opt queue_options;
504 struct node_queue_bw queue_bwspec;
505 struct node_qassign qassign;
506 struct filter_opts filter_opts;
507 struct antispoof_opts antispoof_opts;
508 struct queue_opts queue_opts;
509 struct scrub_opts scrub_opts;
510 struct table_opts table_opts;
511 struct pool_opts pool_opts;
512 struct node_hfsc_opts hfsc_opts;
513 struct node_fairq_opts fairq_opts;
514 struct codel_opts codel_opts;
515 struct pfctl_watermarks *watermarks;
516 } v;
517 int lineno;
518 } YYSTYPE;
519
520 #define PPORT_RANGE 1
521 #define PPORT_STAR 2
522 int parseport(char *, struct range *r, int);
523
524 #define DYNIF_MULTIADDR(addr) ((addr).type == PF_ADDR_DYNIFTL && \
525 (!((addr).iflags & PFI_AFLAG_NOALIAS) || \
526 !isdigit((addr).v.ifname[strlen((addr).v.ifname)-1])))
527
528 %}
529
530 %token PASS BLOCK MATCH SCRUB RETURN IN OS OUT LOG QUICK ON FROM TO FLAGS
531 %token RETURNRST RETURNICMP RETURNICMP6 PROTO INET INET6 ALL ANY ICMPTYPE
532 %token ICMP6TYPE CODE KEEP MODULATE STATE PORT RDR NAT BINAT ARROW NODF
533 %token MINTTL ERROR ALLOWOPTS FASTROUTE FILENAME ROUTETO DUPTO REPLYTO NO LABEL
534 %token NOROUTE URPFFAILED FRAGMENT USER GROUP MAXMSS MAXIMUM TTL TOS DROP TABLE
535 %token REASSEMBLE ANCHOR NATANCHOR RDRANCHOR BINATANCHOR
536 %token SET OPTIMIZATION TIMEOUT LIMIT LOGINTERFACE BLOCKPOLICY FAILPOLICY
537 %token RANDOMID REQUIREORDER SYNPROXY FINGERPRINTS NOSYNC DEBUG SKIP HOSTID
538 %token ANTISPOOF FOR INCLUDE KEEPCOUNTERS SYNCOOKIES L3 MATCHES
539 %token ETHER
540 %token BITMASK RANDOM SOURCEHASH ROUNDROBIN STATICPORT PROBABILITY MAPEPORTSET
541 %token ALTQ CBQ CODEL PRIQ HFSC FAIRQ BANDWIDTH TBRSIZE LINKSHARE REALTIME
542 %token UPPERLIMIT QUEUE PRIORITY QLIMIT HOGS BUCKETS RTABLE TARGET INTERVAL
543 %token DNPIPE DNQUEUE RIDENTIFIER
544 %token LOAD RULESET_OPTIMIZATION PRIO
545 %token STICKYADDRESS ENDPI MAXSRCSTATES MAXSRCNODES SOURCETRACK GLOBAL RULE
546 %token MAXSRCCONN MAXSRCCONNRATE OVERLOAD FLUSH SLOPPY PFLOW ALLOW_RELATED
547 %token TAGGED TAG IFBOUND FLOATING STATEPOLICY STATEDEFAULTS ROUTE SETTOS
548 %token DIVERTTO DIVERTREPLY BRIDGE_TO RECEIVEDON NE LE GE AFTO NATTO RDRTO
549 %token BINATTO MAXPKTRATE MAXPKTSIZE IPV6NH
550 %token <v.string> STRING
551 %token <v.number> NUMBER
552 %token <v.i> PORTBINARY
553 %type <v.interface> interface if_list if_item_not if_item
554 %type <v.number> number icmptype icmp6type uid gid
555 %type <v.number> tos not yesno optnodf
556 %type <v.probability> probability
557 %type <v.i> no dir af fragcache optimizer syncookie_val
558 %type <v.i> sourcetrack flush unaryop statelock
559 %type <v.i> etherprotoval
560 %type <v.b> action nataction natpasslog scrubaction
561 %type <v.b> flags flag blockspec prio
562 %type <v.range> portplain portstar portrange
563 %type <v.hashkey> hashkey
564 %type <v.proto> proto proto_list proto_item
565 %type <v.number> protoval
566 %type <v.icmp> icmpspec
567 %type <v.icmp> icmp_list icmp_item
568 %type <v.icmp> icmp6_list icmp6_item
569 %type <v.number> reticmpspec reticmp6spec
570 %type <v.fromto> fromto l3fromto
571 %type <v.peer> ipportspec from to
572 %type <v.host> ipspec toipspec xhost host dynaddr host_list
573 %type <v.host> redir_host redir_host_list routespec
574 %type <v.host> route_host route_host_list
575 %type <v.os> os xos os_list
576 %type <v.port> portspec port_list port_item
577 %type <v.uid> uids uid_list uid_item
578 %type <v.gid> gids gid_list gid_item
579 %type <v.route> route
580 %type <v.redirspec> no_port_redirspec port_redirspec route_redirspec
581 %type <v.redirspec> binat_redirspec nat_redirspec
582 %type <v.string> label stringall tag anchorname
583 %type <v.string> string varstring numberstring
584 %type <v.keep_state> keep
585 %type <v.state_opt> state_opt_spec state_opt_list state_opt_item
586 %type <v.logquick> logquick quick log logopts logopt
587 %type <v.interface> antispoof_ifspc antispoof_iflst antispoof_if
588 %type <v.qassign> qname etherqname
589 %type <v.queue> qassign qassign_list qassign_item
590 %type <v.queue_options> scheduler
591 %type <v.number> cbqflags_list cbqflags_item
592 %type <v.number> priqflags_list priqflags_item
593 %type <v.hfsc_opts> hfscopts_list hfscopts_item hfsc_opts
594 %type <v.fairq_opts> fairqopts_list fairqopts_item fairq_opts
595 %type <v.codel_opts> codelopts_list codelopts_item codel_opts
596 %type <v.queue_bwspec> bandwidth
597 %type <v.filter_opts> filter_opts filter_opt filter_opts_l etherfilter_opts etherfilter_opt etherfilter_opts_l
598 %type <v.filter_opts> filter_sets filter_set filter_sets_l
599 %type <v.antispoof_opts> antispoof_opts antispoof_opt antispoof_opts_l
600 %type <v.queue_opts> queue_opts queue_opt queue_opts_l
601 %type <v.scrub_opts> scrub_opts scrub_opt scrub_opts_l
602 %type <v.table_opts> table_opts table_opt table_opts_l
603 %type <v.pool_opts> pool_opts pool_opt pool_opts_l
604 %type <v.tagged> tagged
605 %type <v.rtableid> rtable
606 %type <v.watermarks> syncookie_opts
607 %type <v.etherproto> etherproto etherproto_list etherproto_item
608 %type <v.etherfromto> etherfromto
609 %type <v.etheraddr> etherfrom etherto
610 %type <v.bridge_to> bridge
611 %type <v.mac> xmac mac mac_list macspec
612 %%
613
614 ruleset : /* empty */
615 | ruleset include '\n'
616 | ruleset '\n'
617 | ruleset option '\n'
618 | ruleset etherrule '\n'
619 | ruleset etheranchorrule '\n'
620 | ruleset scrubrule '\n'
621 | ruleset natrule '\n'
622 | ruleset binatrule '\n'
623 | ruleset pfrule '\n'
624 | ruleset anchorrule '\n'
625 | ruleset loadrule '\n'
626 | ruleset altqif '\n'
627 | ruleset queuespec '\n'
628 | ruleset varset '\n'
629 | ruleset antispoof '\n'
630 | ruleset tabledef '\n'
631 | '{' fakeanchor '}' '\n';
632 | ruleset error '\n' { file->errors++; }
633 ;
634
635 include : INCLUDE STRING {
636 struct file *nfile;
637
638 if ((nfile = pushfile($2, 0)) == NULL) {
639 yyerror("failed to include file %s", $2);
640 free($2);
641 YYERROR;
642 }
643 free($2);
644
645 file = nfile;
646 lungetc('\n');
647 }
648 ;
649
650 /*
651 * apply to previouslys specified rule: must be careful to note
652 * what that is: pf or nat or binat or rdr
653 */
654 fakeanchor : fakeanchor '\n'
655 | fakeanchor anchorrule '\n'
656 | fakeanchor binatrule '\n'
657 | fakeanchor natrule '\n'
658 | fakeanchor pfrule '\n'
659 | fakeanchor error '\n'
660 ;
661
662 optimizer : string {
663 if (!strcmp($1, "none"))
664 $$ = 0;
665 else if (!strcmp($1, "basic"))
666 $$ = PF_OPTIMIZE_BASIC;
667 else if (!strcmp($1, "profile"))
668 $$ = PF_OPTIMIZE_BASIC | PF_OPTIMIZE_PROFILE;
669 else {
670 yyerror("unknown ruleset-optimization %s", $1);
671 YYERROR;
672 }
673 }
674 ;
675
676 optnodf : /* empty */ { $$ = 0; }
677 | NODF { $$ = 1; }
678 ;
679
680 option : SET REASSEMBLE yesno optnodf {
681 if (check_rulestate(PFCTL_STATE_OPTION))
682 YYERROR;
683 pfctl_set_reassembly(pf, $3, $4);
684 }
685 | SET OPTIMIZATION STRING {
686 if (check_rulestate(PFCTL_STATE_OPTION)) {
687 free($3);
688 YYERROR;
689 }
690 if (pfctl_set_optimization(pf, $3) != 0) {
691 yyerror("unknown optimization %s", $3);
692 free($3);
693 YYERROR;
694 }
695 free($3);
696 }
697 | SET RULESET_OPTIMIZATION optimizer {
698 if (!(pf->opts & PF_OPT_OPTIMIZE)) {
699 pf->opts |= PF_OPT_OPTIMIZE;
700 pf->optimize = $3;
701 }
702 }
703 | SET TIMEOUT timeout_spec
704 | SET TIMEOUT '{' optnl timeout_list '}'
705 | SET LIMIT limit_spec
706 | SET LIMIT '{' optnl limit_list '}'
707 | SET LOGINTERFACE stringall {
708 if (check_rulestate(PFCTL_STATE_OPTION)) {
709 free($3);
710 YYERROR;
711 }
712 if (pfctl_set_logif(pf, $3) != 0) {
713 yyerror("error setting loginterface %s", $3);
714 free($3);
715 YYERROR;
716 }
717 free($3);
718 }
719 | SET HOSTID number {
720 if ($3 == 0 || $3 > UINT_MAX) {
721 yyerror("hostid must be non-zero");
722 YYERROR;
723 }
724 pfctl_set_hostid(pf, $3);
725 }
726 | SET BLOCKPOLICY DROP {
727 if (pf->opts & PF_OPT_VERBOSE)
728 printf("set block-policy drop\n");
729 if (check_rulestate(PFCTL_STATE_OPTION))
730 YYERROR;
731 blockpolicy = PFRULE_DROP;
732 }
733 | SET BLOCKPOLICY RETURN {
734 if (pf->opts & PF_OPT_VERBOSE)
735 printf("set block-policy return\n");
736 if (check_rulestate(PFCTL_STATE_OPTION))
737 YYERROR;
738 blockpolicy = PFRULE_RETURN;
739 }
740 | SET FAILPOLICY DROP {
741 if (pf->opts & PF_OPT_VERBOSE)
742 printf("set fail-policy drop\n");
743 if (check_rulestate(PFCTL_STATE_OPTION))
744 YYERROR;
745 failpolicy = PFRULE_DROP;
746 }
747 | SET FAILPOLICY RETURN {
748 if (pf->opts & PF_OPT_VERBOSE)
749 printf("set fail-policy return\n");
750 if (check_rulestate(PFCTL_STATE_OPTION))
751 YYERROR;
752 failpolicy = PFRULE_RETURN;
753 }
754 | SET REQUIREORDER yesno {
755 if (pf->opts & PF_OPT_VERBOSE)
756 printf("set require-order %s\n",
757 $3 == 1 ? "yes" : "no");
758 require_order = $3;
759 }
760 | SET FINGERPRINTS STRING {
761 if (pf->opts & PF_OPT_VERBOSE)
762 printf("set fingerprints \"%s\"\n", $3);
763 if (check_rulestate(PFCTL_STATE_OPTION)) {
764 free($3);
765 YYERROR;
766 }
767 if (!pf->anchor->name[0]) {
768 if (pfctl_file_fingerprints(pf->dev,
769 pf->opts, $3)) {
770 yyerror("error loading "
771 "fingerprints %s", $3);
772 free($3);
773 YYERROR;
774 }
775 }
776 free($3);
777 }
778 | SET STATEPOLICY statelock {
779 if (pf->opts & PF_OPT_VERBOSE)
780 switch ($3) {
781 case 0:
782 printf("set state-policy floating\n");
783 break;
784 case PFRULE_IFBOUND:
785 printf("set state-policy if-bound\n");
786 break;
787 }
788 default_statelock = $3;
789 }
790 | SET DEBUG STRING {
791 if (check_rulestate(PFCTL_STATE_OPTION)) {
792 free($3);
793 YYERROR;
794 }
795 if (pfctl_do_set_debug(pf, $3) != 0) {
796 yyerror("error setting debuglevel %s", $3);
797 free($3);
798 YYERROR;
799 }
800 free($3);
801 }
802 | SET SKIP interface {
803 if (expand_skip_interface($3) != 0) {
804 yyerror("error setting skip interface(s)");
805 YYERROR;
806 }
807 }
808 | SET STATEDEFAULTS state_opt_list {
809 if (keep_state_defaults != NULL) {
810 yyerror("cannot redefine state-defaults");
811 YYERROR;
812 }
813 keep_state_defaults = $3;
814 }
815 | SET KEEPCOUNTERS {
816 pf->keep_counters = true;
817 }
818 | SET SYNCOOKIES syncookie_val syncookie_opts {
819 if (pfctl_cfg_syncookies(pf, $3, $4)) {
820 yyerror("error setting syncookies");
821 YYERROR;
822 }
823 }
824 ;
825
826 syncookie_val : STRING {
827 if (!strcmp($1, "never"))
828 $$ = PFCTL_SYNCOOKIES_NEVER;
829 else if (!strcmp($1, "adaptive"))
830 $$ = PFCTL_SYNCOOKIES_ADAPTIVE;
831 else if (!strcmp($1, "always"))
832 $$ = PFCTL_SYNCOOKIES_ALWAYS;
833 else {
834 yyerror("illegal value for syncookies");
835 YYERROR;
836 }
837 }
838 ;
839 syncookie_opts : /* empty */ { $$ = NULL; }
840 | {
841 memset(&syncookie_opts, 0, sizeof(syncookie_opts));
842 } '(' syncookie_opt_l ')' { $$ = &syncookie_opts; }
843 ;
844
845 syncookie_opt_l : syncookie_opt_l comma syncookie_opt
846 | syncookie_opt
847 ;
848
849 syncookie_opt : STRING STRING {
850 double val;
851 char *cp;
852
853 val = strtod($2, &cp);
854 if (cp == NULL || strcmp(cp, "%"))
855 YYERROR;
856 if (val <= 0 || val > 100) {
857 yyerror("illegal percentage value");
858 YYERROR;
859 }
860 if (!strcmp($1, "start")) {
861 syncookie_opts.hi = val;
862 } else if (!strcmp($1, "end")) {
863 syncookie_opts.lo = val;
864 } else {
865 yyerror("illegal syncookie option");
866 YYERROR;
867 }
868 }
869 ;
870
871 stringall : STRING { $$ = $1; }
872 | ALL {
873 if (($$ = strdup("all")) == NULL) {
874 err(1, "stringall: strdup");
875 }
876 }
877 ;
878
879 string : STRING string {
880 if (asprintf(&$$, "%s %s", $1, $2) == -1)
881 err(1, "string: asprintf");
882 free($1);
883 free($2);
884 }
885 | STRING
886 ;
887
888 varstring : numberstring varstring {
889 if (asprintf(&$$, "%s %s", $1, $2) == -1)
890 err(1, "string: asprintf");
891 free($1);
892 free($2);
893 }
894 | numberstring
895 ;
896
897 numberstring : NUMBER {
898 char *s;
899 if (asprintf(&s, "%lld", (long long)$1) == -1) {
900 yyerror("string: asprintf");
901 YYERROR;
902 }
903 $$ = s;
904 }
905 | STRING
906 ;
907
908 varset : STRING '=' varstring {
909 char *s = $1;
910 if (pf->opts & PF_OPT_VERBOSE)
911 printf("%s = \"%s\"\n", $1, $3);
912 while (*s++) {
913 if (isspace((unsigned char)*s)) {
914 yyerror("macro name cannot contain "
915 "whitespace");
916 free($1);
917 free($3);
918 YYERROR;
919 }
920 }
921 if (symset($1, $3, 0) == -1)
922 err(1, "cannot store variable %s", $1);
923 free($1);
924 free($3);
925 }
926 ;
927
928 anchorname : STRING {
929 if ($1[0] == '\0') {
930 free($1);
931 yyerror("anchor name must not be empty");
932 YYERROR;
933 }
934 if (strlen(pf->anchor->path) + 1 +
935 strlen($1) >= PATH_MAX) {
936 free($1);
937 yyerror("anchor name is longer than %u",
938 PATH_MAX - 1);
939 YYERROR;
940 }
941 if ($1[0] == '_' || strstr($1, "/_") != NULL) {
942 free($1);
943 yyerror("anchor names beginning with '_' "
944 "are reserved for internal use");
945 YYERROR;
946 }
947 $$ = $1;
948 }
949 | /* empty */ { $$ = NULL; }
950 ;
951
952 pfa_anchorlist : /* empty */
953 | pfa_anchorlist '\n'
954 | pfa_anchorlist tabledef '\n'
955 | pfa_anchorlist pfrule '\n'
956 | pfa_anchorlist anchorrule '\n'
957 | pfa_anchorlist include '\n'
958 ;
959
960 pfa_anchor : '{'
961 {
962 char ta[PF_ANCHOR_NAME_SIZE];
963 struct pfctl_ruleset *rs;
964
965 /* stepping into a brace anchor */
966 if (pf->asd >= PFCTL_ANCHOR_STACK_DEPTH)
967 errx(1, "pfa_anchor: anchors too deep");
968 pf->asd++;
969 pf->bn++;
970
971 /*
972 * Anchor contents are parsed before the anchor rule
973 * production completes, so we don't know the real
974 * location yet. Create a holding ruleset in the root;
975 * contents will be moved afterwards.
976 */
977 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
978 rs = pf_find_or_create_ruleset(ta);
979 if (rs == NULL)
980 err(1, "pfa_anchor: pf_find_or_create_ruleset (%s)", ta);
981 pf->astack[pf->asd] = rs->anchor;
982 pf->anchor = rs->anchor;
983 } '\n' pfa_anchorlist '}'
984 {
985 pf->alast = pf->anchor;
986 pf->asd--;
987 pf->anchor = pf->astack[pf->asd];
988 }
989 | /* empty */
990 ;
991
992 anchorrule : ANCHOR anchorname dir quick interface af proto fromto
993 filter_opts pfa_anchor
994 {
995 struct pfctl_rule r;
996 struct node_proto *proto;
997
998 if (check_rulestate(PFCTL_STATE_FILTER)) {
999 if ($2)
1000 free($2);
1001 YYERROR;
1002 }
1003
1004 pfctl_init_rule(&r);
1005
1006 if (pf->astack[pf->asd + 1]) {
1007 if ($2 && strchr($2, '/') != NULL) {
1008 free($2);
1009 yyerror("anchor paths containing '/' "
1010 "cannot be used for inline anchors.");
1011 YYERROR;
1012 }
1013
1014 /* Move inline rules into relative location. */
1015 pfctl_anchor_setup(&r,
1016 &pf->astack[pf->asd]->ruleset,
1017 $2 ? $2 : pf->alast->name);
1018
1019 if (r.anchor == NULL)
1020 err(1, "anchorrule: unable to "
1021 "create ruleset");
1022
1023 if (pf->alast != r.anchor) {
1024 if (r.anchor->match) {
1025 yyerror("inline anchor '%s' "
1026 "already exists",
1027 r.anchor->name);
1028 YYERROR;
1029 }
1030 mv_rules(&pf->alast->ruleset,
1031 &r.anchor->ruleset);
1032 mv_tables(pf, &pfr_ktables, r.anchor, pf->alast);
1033 }
1034 pf_remove_if_empty_ruleset(&pf->alast->ruleset);
1035 pf->alast = r.anchor;
1036 } else {
1037 if (!$2) {
1038 yyerror("anchors without explicit "
1039 "rules must specify a name");
1040 YYERROR;
1041 }
1042 }
1043 r.direction = $3;
1044 r.quick = $4.quick;
1045 r.af = $6;
1046
1047 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
1048 for (proto = $7; proto != NULL &&
1049 proto->proto != IPPROTO_TCP;
1050 proto = proto->next)
1051 ; /* nothing */
1052 if (proto == NULL && $7 != NULL) {
1053 if ($9.flags.b1 || $9.flags.b2)
1054 yyerror(
1055 "flags only apply to tcp");
1056 if ($8.src_os)
1057 yyerror(
1058 "OS fingerprinting only "
1059 "applies to tcp");
1060 YYERROR;
1061 }
1062 }
1063
1064 if (filteropts_to_rule(&r, &$9))
1065 YYERROR;
1066
1067 if ($9.keep.action) {
1068 yyerror("cannot specify state handling "
1069 "on anchors");
1070 YYERROR;
1071 }
1072
1073 decide_address_family($8.src.host, &r.af);
1074 decide_address_family($8.dst.host, &r.af);
1075
1076 expand_rule(&r, false, $5, NULL, NULL, NULL,
1077 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host,
1078 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec,
1079 pf->astack[pf->asd + 1] ? pf->alast->name : $2);
1080 free($2);
1081 pf->astack[pf->asd + 1] = NULL;
1082 }
1083 | NATANCHOR string interface af proto fromto rtable {
1084 struct pfctl_rule r;
1085
1086 if (check_rulestate(PFCTL_STATE_NAT)) {
1087 free($2);
1088 YYERROR;
1089 }
1090
1091 pfctl_init_rule(&r);
1092
1093 r.action = PF_NAT;
1094 r.af = $4;
1095 r.rtableid = $7;
1096
1097 decide_address_family($6.src.host, &r.af);
1098 decide_address_family($6.dst.host, &r.af);
1099
1100 expand_rule(&r, false, $3, NULL, NULL, NULL,
1101 $5, $6.src_os, $6.src.host, $6.src.port, $6.dst.host,
1102 $6.dst.port, 0, 0, 0, 0, $2);
1103 free($2);
1104 }
1105 | RDRANCHOR string interface af proto fromto rtable {
1106 struct pfctl_rule r;
1107
1108 if (check_rulestate(PFCTL_STATE_NAT)) {
1109 free($2);
1110 YYERROR;
1111 }
1112
1113 pfctl_init_rule(&r);
1114
1115 r.action = PF_RDR;
1116 r.af = $4;
1117 r.rtableid = $7;
1118
1119 decide_address_family($6.src.host, &r.af);
1120 decide_address_family($6.dst.host, &r.af);
1121
1122 if ($6.src.port != NULL) {
1123 yyerror("source port parameter not supported"
1124 " in rdr-anchor");
1125 YYERROR;
1126 }
1127 if ($6.dst.port != NULL) {
1128 if ($6.dst.port->next != NULL) {
1129 yyerror("destination port list "
1130 "expansion not supported in "
1131 "rdr-anchor");
1132 YYERROR;
1133 } else if ($6.dst.port->op != PF_OP_EQ) {
1134 yyerror("destination port operators"
1135 " not supported in rdr-anchor");
1136 YYERROR;
1137 }
1138 r.dst.port[0] = $6.dst.port->port[0];
1139 r.dst.port[1] = $6.dst.port->port[1];
1140 r.dst.port_op = $6.dst.port->op;
1141 }
1142
1143 expand_rule(&r, false, $3, NULL, NULL, NULL,
1144 $5, $6.src_os, $6.src.host, $6.src.port, $6.dst.host,
1145 $6.dst.port, 0, 0, 0, 0, $2);
1146 free($2);
1147 }
1148 | BINATANCHOR string interface af proto fromto rtable {
1149 struct pfctl_rule r;
1150
1151 if (check_rulestate(PFCTL_STATE_NAT)) {
1152 free($2);
1153 YYERROR;
1154 }
1155
1156 pfctl_init_rule(&r);
1157
1158 r.action = PF_BINAT;
1159 r.af = $4;
1160 r.rtableid = $7;
1161 if ($5 != NULL) {
1162 if ($5->next != NULL) {
1163 yyerror("proto list expansion"
1164 " not supported in binat-anchor");
1165 YYERROR;
1166 }
1167 r.proto = $5->proto;
1168 free($5);
1169 }
1170
1171 if ($6.src.host != NULL || $6.src.port != NULL ||
1172 $6.dst.host != NULL || $6.dst.port != NULL) {
1173 yyerror("fromto parameter not supported"
1174 " in binat-anchor");
1175 YYERROR;
1176 }
1177
1178 decide_address_family($6.src.host, &r.af);
1179 decide_address_family($6.dst.host, &r.af);
1180
1181 pfctl_append_rule(pf, &r, $2);
1182 free($2);
1183 }
1184 ;
1185
1186 loadrule : LOAD ANCHOR anchorname FROM string {
1187 struct loadanchors *loadanchor;
1188
1189 if ($3 == NULL) {
1190 yyerror("anchor name is missing");
1191 YYERROR;
1192 }
1193 loadanchor = calloc(1, sizeof(struct loadanchors));
1194 if (loadanchor == NULL)
1195 err(1, "loadrule: calloc");
1196 if ((loadanchor->anchorname = malloc(MAXPATHLEN)) ==
1197 NULL)
1198 err(1, "loadrule: malloc");
1199 if (pf->anchor->name[0])
1200 snprintf(loadanchor->anchorname, MAXPATHLEN,
1201 "%s/%s", pf->anchor->path, $3);
1202 else
1203 strlcpy(loadanchor->anchorname, $3, MAXPATHLEN);
1204 if ((loadanchor->filename = strdup($5)) == NULL)
1205 err(1, "loadrule: strdup");
1206
1207 TAILQ_INSERT_TAIL(&loadanchorshead, loadanchor,
1208 entries);
1209
1210 free($3);
1211 free($5);
1212 };
1213
1214 scrubaction : no SCRUB {
1215 $$.b2 = $$.w = 0;
1216 if ($1)
1217 $$.b1 = PF_NOSCRUB;
1218 else
1219 $$.b1 = PF_SCRUB;
1220 }
1221 ;
1222
1223 etherrule : ETHER action dir quick interface bridge etherproto etherfromto l3fromto etherfilter_opts
1224 {
1225 struct pfctl_eth_rule r;
1226
1227 bzero(&r, sizeof(r));
1228
1229 if (check_rulestate(PFCTL_STATE_ETHER))
1230 YYERROR;
1231
1232 r.action = $2.b1;
1233 r.direction = $3;
1234 r.quick = $4.quick;
1235 if ($10.tag != NULL)
1236 strlcpy(r.tagname, $10.tag, sizeof(r.tagname));
1237 if ($10.match_tag)
1238 if (strlcpy(r.match_tagname, $10.match_tag,
1239 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1240 yyerror("tag too long, max %u chars",
1241 PF_TAG_NAME_SIZE - 1);
1242 YYERROR;
1243 }
1244 r.match_tag_not = $10.match_tag_not;
1245 if ($10.queues.qname != NULL)
1246 strlcpy(r.qname, $10.queues.qname, sizeof(r.qname));
1247 r.dnpipe = $10.dnpipe;
1248 r.dnflags = $10.free_flags;
1249 if (eth_rule_label(&r, $10.label))
1250 YYERROR;
1251 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
1252 free($10.label[i]);
1253 r.ridentifier = $10.ridentifier;
1254
1255 expand_eth_rule(&r, $5, $7, $8.src, $8.dst,
1256 $9.src.host, $9.dst.host, $6, "");
1257 }
1258 ;
1259
1260 etherpfa_anchorlist : /* empty */
1261 | etherpfa_anchorlist '\n'
1262 | etherpfa_anchorlist etherrule '\n'
1263 | etherpfa_anchorlist etheranchorrule '\n'
1264 ;
1265
1266 etherpfa_anchor : '{'
1267 {
1268 char ta[PF_ANCHOR_NAME_SIZE];
1269 struct pfctl_eth_ruleset *rs;
1270
1271 /* steping into a brace anchor */
1272 if (pf->asd >= PFCTL_ANCHOR_STACK_DEPTH)
1273 errx(1, "pfa_anchor: anchors too deep");
1274 pf->asd++;
1275 pf->bn++;
1276
1277 /* create a holding ruleset in the root */
1278 snprintf(ta, PF_ANCHOR_NAME_SIZE, "_%d", pf->bn);
1279 rs = pf_find_or_create_eth_ruleset(ta);
1280 if (rs == NULL)
1281 err(1, "etherpfa_anchor: pf_find_or_create_eth_ruleset");
1282 pf->eastack[pf->asd] = rs->anchor;
1283 pf->eanchor = rs->anchor;
1284 } '\n' etherpfa_anchorlist '}'
1285 {
1286 pf->ealast = pf->eanchor;
1287 pf->asd--;
1288 pf->eanchor = pf->eastack[pf->asd];
1289 }
1290 | /* empty */
1291 ;
1292
1293 etheranchorrule : ETHER ANCHOR anchorname dir quick interface etherproto etherfromto l3fromto etherpfa_anchor
1294 {
1295 struct pfctl_eth_rule r;
1296
1297 if (check_rulestate(PFCTL_STATE_ETHER)) {
1298 free($3);
1299 YYERROR;
1300 }
1301
1302 if ($3 && ($3[0] == '_' || strstr($3, "/_") != NULL)) {
1303 free($3);
1304 yyerror("anchor names beginning with '_' "
1305 "are reserved for internal use");
1306 YYERROR;
1307 }
1308
1309 memset(&r, 0, sizeof(r));
1310 if (pf->eastack[pf->asd + 1]) {
1311 if ($3 && strchr($3, '/') != NULL) {
1312 free($3);
1313 yyerror("anchor paths containing '/' "
1314 "cannot be used for inline anchors.");
1315 YYERROR;
1316 }
1317
1318 /* Move inline rules into relative location. */
1319 pfctl_eth_anchor_setup(pf, &r,
1320 &pf->eastack[pf->asd]->ruleset,
1321 $3 ? $3 : pf->ealast->name);
1322 if (r.anchor == NULL)
1323 err(1, "etheranchorrule: unable to "
1324 "create ruleset");
1325
1326 if (pf->ealast != r.anchor) {
1327 if (r.anchor->match) {
1328 yyerror("inline anchor '%s' "
1329 "already exists",
1330 r.anchor->name);
1331 YYERROR;
1332 }
1333 mv_eth_rules(&pf->ealast->ruleset,
1334 &r.anchor->ruleset);
1335 }
1336 pf_remove_if_empty_eth_ruleset(&pf->ealast->ruleset);
1337 pf->ealast = r.anchor;
1338 } else {
1339 if (!$3) {
1340 yyerror("anchors without explicit "
1341 "rules must specify a name");
1342 YYERROR;
1343 }
1344 }
1345
1346 r.direction = $4;
1347 r.quick = $5.quick;
1348
1349 expand_eth_rule(&r, $6, $7, $8.src, $8.dst,
1350 $9.src.host, $9.dst.host, NULL,
1351 pf->eastack[pf->asd + 1] ? pf->ealast->name : $3);
1352
1353 free($3);
1354 pf->eastack[pf->asd + 1] = NULL;
1355 }
1356 ;
1357
1358 etherfilter_opts : {
1359 bzero(&filter_opts, sizeof filter_opts);
1360 }
1361 etherfilter_opts_l
1362 { $$ = filter_opts; }
1363 | /* empty */ {
1364 bzero(&filter_opts, sizeof filter_opts);
1365 $$ = filter_opts;
1366 }
1367 ;
1368
1369 etherfilter_opts_l : etherfilter_opts_l etherfilter_opt
1370 | etherfilter_opt
1371
1372 etherfilter_opt : etherqname {
1373 if (filter_opts.queues.qname) {
1374 yyerror("queue cannot be redefined");
1375 YYERROR;
1376 }
1377 filter_opts.queues = $1;
1378 }
1379 | RIDENTIFIER number {
1380 filter_opts.ridentifier = $2;
1381 }
1382 | label {
1383 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
1384 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
1385 YYERROR;
1386 }
1387 filter_opts.label[filter_opts.labelcount++] = $1;
1388 }
1389 | TAG string {
1390 filter_opts.tag = $2;
1391 }
1392 | not TAGGED string {
1393 filter_opts.match_tag = $3;
1394 filter_opts.match_tag_not = $1;
1395 }
1396 | DNPIPE number {
1397 filter_opts.dnpipe = $2;
1398 filter_opts.free_flags |= PFRULE_DN_IS_PIPE;
1399 }
1400 | DNQUEUE number {
1401 filter_opts.dnpipe = $2;
1402 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE;
1403 }
1404 ;
1405
1406 bridge : /* empty */ {
1407 $$ = NULL;
1408 }
1409 | BRIDGE_TO STRING {
1410 $$ = strdup($2);
1411 }
1412 ;
1413
1414 scrubrule : scrubaction dir logquick interface af proto fromto scrub_opts
1415 {
1416 struct pfctl_rule r;
1417
1418 if (check_rulestate(PFCTL_STATE_SCRUB))
1419 YYERROR;
1420
1421 pfctl_init_rule(&r);
1422
1423 r.action = $1.b1;
1424 r.direction = $2;
1425
1426 r.log = $3.log;
1427 r.logif = $3.logif;
1428 if ($3.quick) {
1429 yyerror("scrub rules do not support 'quick'");
1430 YYERROR;
1431 }
1432
1433 r.af = $5;
1434 if ($8.nodf)
1435 r.rule_flag |= PFRULE_NODF;
1436 if ($8.randomid)
1437 r.rule_flag |= PFRULE_RANDOMID;
1438 if ($8.reassemble_tcp) {
1439 if (r.direction != PF_INOUT) {
1440 yyerror("reassemble tcp rules can not "
1441 "specify direction");
1442 YYERROR;
1443 }
1444 r.rule_flag |= PFRULE_REASSEMBLE_TCP;
1445 }
1446 if ($8.minttl)
1447 r.min_ttl = $8.minttl;
1448 if ($8.maxmss)
1449 r.max_mss = $8.maxmss;
1450 if ($8.marker & FOM_SETTOS) {
1451 r.rule_flag |= PFRULE_SET_TOS;
1452 r.set_tos = $8.settos;
1453 }
1454 if ($8.fragcache)
1455 r.rule_flag |= $8.fragcache;
1456 if ($8.match_tag)
1457 if (strlcpy(r.match_tagname, $8.match_tag,
1458 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
1459 yyerror("tag too long, max %u chars",
1460 PF_TAG_NAME_SIZE - 1);
1461 YYERROR;
1462 }
1463 r.match_tag_not = $8.match_tag_not;
1464 r.rtableid = $8.rtableid;
1465
1466 expand_rule(&r, false, $4, NULL, NULL, NULL,
1467 $6, $7.src_os, $7.src.host, $7.src.port, $7.dst.host,
1468 $7.dst.port, NULL, NULL, NULL, NULL, "");
1469 }
1470 ;
1471
1472 scrub_opts : {
1473 bzero(&scrub_opts, sizeof scrub_opts);
1474 scrub_opts.rtableid = -1;
1475 }
1476 scrub_opts_l
1477 { $$ = scrub_opts; }
1478 | /* empty */ {
1479 bzero(&scrub_opts, sizeof scrub_opts);
1480 scrub_opts.rtableid = -1;
1481 $$ = scrub_opts;
1482 }
1483 ;
1484
1485 scrub_opts_l : scrub_opts_l comma scrub_opt
1486 | scrub_opt
1487 ;
1488
1489 scrub_opt : NODF {
1490 if (scrub_opts.nodf) {
1491 yyerror("no-df cannot be respecified");
1492 YYERROR;
1493 }
1494 scrub_opts.nodf = 1;
1495 }
1496 | MINTTL NUMBER {
1497 if (scrub_opts.marker & FOM_MINTTL) {
1498 yyerror("min-ttl cannot be respecified");
1499 YYERROR;
1500 }
1501 if ($2 < 0 || $2 > 255) {
1502 yyerror("illegal min-ttl value %d", $2);
1503 YYERROR;
1504 }
1505 scrub_opts.marker |= FOM_MINTTL;
1506 scrub_opts.minttl = $2;
1507 }
1508 | MAXMSS NUMBER {
1509 if (scrub_opts.marker & FOM_MAXMSS) {
1510 yyerror("max-mss cannot be respecified");
1511 YYERROR;
1512 }
1513 if ($2 < 0 || $2 > 65535) {
1514 yyerror("illegal max-mss value %d", $2);
1515 YYERROR;
1516 }
1517 scrub_opts.marker |= FOM_MAXMSS;
1518 scrub_opts.maxmss = $2;
1519 }
1520 | SETTOS tos {
1521 if (scrub_opts.marker & FOM_SETTOS) {
1522 yyerror("set-tos cannot be respecified");
1523 YYERROR;
1524 }
1525 scrub_opts.marker |= FOM_SETTOS;
1526 scrub_opts.settos = $2;
1527 }
1528 | fragcache {
1529 if (scrub_opts.marker & FOM_FRAGCACHE) {
1530 yyerror("fragcache cannot be respecified");
1531 YYERROR;
1532 }
1533 scrub_opts.marker |= FOM_FRAGCACHE;
1534 scrub_opts.fragcache = $1;
1535 }
1536 | REASSEMBLE STRING {
1537 if (strcasecmp($2, "tcp") != 0) {
1538 yyerror("scrub reassemble supports only tcp, "
1539 "not '%s'", $2);
1540 free($2);
1541 YYERROR;
1542 }
1543 free($2);
1544 if (scrub_opts.reassemble_tcp) {
1545 yyerror("reassemble tcp cannot be respecified");
1546 YYERROR;
1547 }
1548 scrub_opts.reassemble_tcp = 1;
1549 }
1550 | RANDOMID {
1551 if (scrub_opts.randomid) {
1552 yyerror("random-id cannot be respecified");
1553 YYERROR;
1554 }
1555 scrub_opts.randomid = 1;
1556 }
1557 | RTABLE NUMBER {
1558 if ($2 < 0 || $2 > rt_tableid_max()) {
1559 yyerror("invalid rtable id");
1560 YYERROR;
1561 }
1562 scrub_opts.rtableid = $2;
1563 }
1564 | not TAGGED string {
1565 scrub_opts.match_tag = $3;
1566 scrub_opts.match_tag_not = $1;
1567 }
1568 ;
1569
1570 fragcache : FRAGMENT REASSEMBLE { $$ = 0; /* default */ }
1571 | FRAGMENT NO REASSEMBLE { $$ = PFRULE_FRAGMENT_NOREASS; }
1572 ;
1573
1574 antispoof : ANTISPOOF logquick antispoof_ifspc af antispoof_opts {
1575 struct pfctl_rule r;
1576 struct node_host *h = NULL, *hh;
1577 struct node_if *i, *j;
1578
1579 if (check_rulestate(PFCTL_STATE_FILTER))
1580 YYERROR;
1581
1582 for (i = $3; i; i = i->next) {
1583 pfctl_init_rule(&r);
1584
1585 r.action = PF_DROP;
1586 r.direction = PF_IN;
1587 r.log = $2.log;
1588 r.logif = $2.logif;
1589 r.quick = $2.quick;
1590 r.af = $4;
1591 r.ridentifier = $5.ridentifier;
1592 if (rule_label(&r, $5.label))
1593 YYERROR;
1594 r.rtableid = $5.rtableid;
1595 j = calloc(1, sizeof(struct node_if));
1596 if (j == NULL)
1597 err(1, "antispoof: calloc");
1598 if (strlcpy(j->ifname, i->ifname,
1599 sizeof(j->ifname)) >= sizeof(j->ifname)) {
1600 free(j);
1601 yyerror("interface name too long");
1602 YYERROR;
1603 }
1604 j->not = 1;
1605 if (i->dynamic) {
1606 h = calloc(1, sizeof(*h));
1607 if (h == NULL)
1608 err(1, "address: calloc");
1609 h->addr.type = PF_ADDR_DYNIFTL;
1610 set_ipmask(h, 128);
1611 if (strlcpy(h->addr.v.ifname, i->ifname,
1612 sizeof(h->addr.v.ifname)) >=
1613 sizeof(h->addr.v.ifname)) {
1614 free(h);
1615 yyerror(
1616 "interface name too long");
1617 YYERROR;
1618 }
1619 hh = malloc(sizeof(*hh));
1620 if (hh == NULL)
1621 err(1, "address: malloc");
1622 bcopy(h, hh, sizeof(*hh));
1623 h->addr.iflags = PFI_AFLAG_NETWORK;
1624 } else {
1625 h = ifa_lookup(j->ifname,
1626 PFI_AFLAG_NETWORK);
1627 hh = NULL;
1628 }
1629
1630 if (h != NULL)
1631 expand_rule(&r, false, j, NULL, NULL,
1632 NULL, NULL, NULL, h, NULL, NULL,
1633 NULL, NULL, NULL, NULL, NULL, "");
1634
1635 if ((i->ifa_flags & IFF_LOOPBACK) == 0) {
1636 bzero(&r, sizeof(r));
1637
1638 r.action = PF_DROP;
1639 r.direction = PF_IN;
1640 r.log = $2.log;
1641 r.logif = $2.logif;
1642 r.quick = $2.quick;
1643 r.af = $4;
1644 r.ridentifier = $5.ridentifier;
1645 if (rule_label(&r, $5.label))
1646 YYERROR;
1647 r.rtableid = $5.rtableid;
1648 if (hh != NULL)
1649 h = hh;
1650 else
1651 h = ifa_lookup(i->ifname, 0);
1652 if (h != NULL)
1653 expand_rule(&r, false, NULL,
1654 NULL, NULL, NULL, NULL,
1655 NULL, h, NULL, NULL, NULL,
1656 NULL, NULL, NULL, NULL, "");
1657 } else
1658 free(hh);
1659 }
1660 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
1661 free($5.label[i]);
1662 }
1663 ;
1664
1665 antispoof_ifspc : FOR antispoof_if { $$ = $2; }
1666 | FOR '{' optnl antispoof_iflst '}' { $$ = $4; }
1667 ;
1668
1669 antispoof_iflst : antispoof_if optnl { $$ = $1; }
1670 | antispoof_iflst comma antispoof_if optnl {
1671 $1->tail->next = $3;
1672 $1->tail = $3;
1673 $$ = $1;
1674 }
1675 ;
1676
1677 antispoof_if : if_item { $$ = $1; }
1678 | '(' if_item ')' {
1679 $2->dynamic = 1;
1680 $$ = $2;
1681 }
1682 ;
1683
1684 antispoof_opts : {
1685 bzero(&antispoof_opts, sizeof antispoof_opts);
1686 antispoof_opts.rtableid = -1;
1687 }
1688 antispoof_opts_l
1689 { $$ = antispoof_opts; }
1690 | /* empty */ {
1691 bzero(&antispoof_opts, sizeof antispoof_opts);
1692 antispoof_opts.rtableid = -1;
1693 $$ = antispoof_opts;
1694 }
1695 ;
1696
1697 antispoof_opts_l : antispoof_opts_l antispoof_opt
1698 | antispoof_opt
1699 ;
1700
1701 antispoof_opt : label {
1702 if (antispoof_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
1703 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
1704 YYERROR;
1705 }
1706 antispoof_opts.label[antispoof_opts.labelcount++] = $1;
1707 }
1708 | RIDENTIFIER number {
1709 antispoof_opts.ridentifier = $2;
1710 }
1711 | RTABLE NUMBER {
1712 if ($2 < 0 || $2 > rt_tableid_max()) {
1713 yyerror("invalid rtable id");
1714 YYERROR;
1715 }
1716 antispoof_opts.rtableid = $2;
1717 }
1718 ;
1719
1720 not : '!' { $$ = 1; }
1721 | /* empty */ { $$ = 0; }
1722 ;
1723
1724 tabledef : TABLE '<' STRING '>' table_opts {
1725 struct node_host *h, *nh;
1726 struct node_tinit *ti, *nti;
1727
1728 if (strlen($3) >= PF_TABLE_NAME_SIZE) {
1729 yyerror("table name too long, max %d chars",
1730 PF_TABLE_NAME_SIZE - 1);
1731 free($3);
1732 YYERROR;
1733 }
1734 if (pf->loadopt & PFCTL_FLAG_TABLE)
1735 if (process_tabledef($3, &$5, pf->opts)) {
1736 free($3);
1737 YYERROR;
1738 }
1739 free($3);
1740 for (ti = SIMPLEQ_FIRST(&$5.init_nodes);
1741 ti != SIMPLEQ_END(&$5.init_nodes); ti = nti) {
1742 if (ti->file)
1743 free(ti->file);
1744 for (h = ti->host; h != NULL; h = nh) {
1745 nh = h->next;
1746 free(h);
1747 }
1748 nti = SIMPLEQ_NEXT(ti, entries);
1749 free(ti);
1750 }
1751 }
1752 ;
1753
1754 table_opts : {
1755 bzero(&table_opts, sizeof table_opts);
1756 SIMPLEQ_INIT(&table_opts.init_nodes);
1757 }
1758 table_opts_l
1759 { $$ = table_opts; }
1760 | /* empty */
1761 {
1762 bzero(&table_opts, sizeof table_opts);
1763 SIMPLEQ_INIT(&table_opts.init_nodes);
1764 $$ = table_opts;
1765 }
1766 ;
1767
1768 table_opts_l : table_opts_l table_opt
1769 | table_opt
1770 ;
1771
1772 table_opt : STRING {
1773 if (!strcmp($1, "const"))
1774 table_opts.flags |= PFR_TFLAG_CONST;
1775 else if (!strcmp($1, "persist"))
1776 table_opts.flags |= PFR_TFLAG_PERSIST;
1777 else if (!strcmp($1, "counters"))
1778 table_opts.flags |= PFR_TFLAG_COUNTERS;
1779 else {
1780 yyerror("invalid table option '%s'", $1);
1781 free($1);
1782 YYERROR;
1783 }
1784 free($1);
1785 }
1786 | '{' optnl '}' { table_opts.init_addr = 1; }
1787 | '{' optnl host_list '}' {
1788 struct node_host *n;
1789 struct node_tinit *ti;
1790
1791 for (n = $3; n != NULL; n = n->next) {
1792 switch (n->addr.type) {
1793 case PF_ADDR_ADDRMASK:
1794 continue; /* ok */
1795 case PF_ADDR_RANGE:
1796 yyerror("address ranges are not "
1797 "permitted inside tables");
1798 break;
1799 case PF_ADDR_DYNIFTL:
1800 yyerror("dynamic addresses are not "
1801 "permitted inside tables");
1802 break;
1803 case PF_ADDR_TABLE:
1804 yyerror("tables cannot contain tables");
1805 break;
1806 case PF_ADDR_NOROUTE:
1807 yyerror("\"no-route\" is not permitted "
1808 "inside tables");
1809 break;
1810 case PF_ADDR_URPFFAILED:
1811 yyerror("\"urpf-failed\" is not "
1812 "permitted inside tables");
1813 break;
1814 default:
1815 yyerror("unknown address type %d",
1816 n->addr.type);
1817 }
1818 YYERROR;
1819 }
1820 if (!(ti = calloc(1, sizeof(*ti))))
1821 err(1, "table_opt: calloc");
1822 ti->host = $3;
1823 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1824 entries);
1825 table_opts.init_addr = 1;
1826 }
1827 | FILENAME STRING {
1828 struct node_tinit *ti;
1829
1830 if (!(ti = calloc(1, sizeof(*ti))))
1831 err(1, "table_opt: calloc");
1832 ti->file = $2;
1833 SIMPLEQ_INSERT_TAIL(&table_opts.init_nodes, ti,
1834 entries);
1835 table_opts.init_addr = 1;
1836 }
1837 ;
1838
1839 altqif : ALTQ interface queue_opts QUEUE qassign {
1840 struct pf_altq a;
1841
1842 if (check_rulestate(PFCTL_STATE_QUEUE))
1843 YYERROR;
1844
1845 memset(&a, 0, sizeof(a));
1846 if ($3.scheduler.qtype == ALTQT_NONE) {
1847 yyerror("no scheduler specified!");
1848 YYERROR;
1849 }
1850 a.scheduler = $3.scheduler.qtype;
1851 a.qlimit = $3.qlimit;
1852 a.tbrsize = $3.tbrsize;
1853 if ($5 == NULL && $3.scheduler.qtype != ALTQT_CODEL) {
1854 yyerror("no child queues specified");
1855 YYERROR;
1856 }
1857 if (expand_altq(&a, $2, $5, $3.queue_bwspec,
1858 &$3.scheduler))
1859 YYERROR;
1860 }
1861 ;
1862
1863 queuespec : QUEUE STRING interface queue_opts qassign {
1864 struct pf_altq a;
1865
1866 if (check_rulestate(PFCTL_STATE_QUEUE)) {
1867 free($2);
1868 YYERROR;
1869 }
1870
1871 memset(&a, 0, sizeof(a));
1872
1873 if (strlcpy(a.qname, $2, sizeof(a.qname)) >=
1874 sizeof(a.qname)) {
1875 yyerror("queue name too long (max "
1876 "%d chars)", PF_QNAME_SIZE-1);
1877 free($2);
1878 YYERROR;
1879 }
1880 free($2);
1881 if ($4.tbrsize) {
1882 yyerror("cannot specify tbrsize for queue");
1883 YYERROR;
1884 }
1885 if ($4.priority > 255) {
1886 yyerror("priority out of range: max 255");
1887 YYERROR;
1888 }
1889 a.priority = $4.priority;
1890 a.qlimit = $4.qlimit;
1891 a.scheduler = $4.scheduler.qtype;
1892 if (expand_queue(&a, $3, $5, $4.queue_bwspec,
1893 &$4.scheduler)) {
1894 yyerror("errors in queue definition");
1895 YYERROR;
1896 }
1897 }
1898 ;
1899
1900 queue_opts : {
1901 bzero(&queue_opts, sizeof queue_opts);
1902 queue_opts.priority = DEFAULT_PRIORITY;
1903 queue_opts.qlimit = DEFAULT_QLIMIT;
1904 queue_opts.scheduler.qtype = ALTQT_NONE;
1905 queue_opts.queue_bwspec.bw_percent = 100;
1906 }
1907 queue_opts_l
1908 { $$ = queue_opts; }
1909 | /* empty */ {
1910 bzero(&queue_opts, sizeof queue_opts);
1911 queue_opts.priority = DEFAULT_PRIORITY;
1912 queue_opts.qlimit = DEFAULT_QLIMIT;
1913 queue_opts.scheduler.qtype = ALTQT_NONE;
1914 queue_opts.queue_bwspec.bw_percent = 100;
1915 $$ = queue_opts;
1916 }
1917 ;
1918
1919 queue_opts_l : queue_opts_l queue_opt
1920 | queue_opt
1921 ;
1922
1923 queue_opt : BANDWIDTH bandwidth {
1924 if (queue_opts.marker & QOM_BWSPEC) {
1925 yyerror("bandwidth cannot be respecified");
1926 YYERROR;
1927 }
1928 queue_opts.marker |= QOM_BWSPEC;
1929 queue_opts.queue_bwspec = $2;
1930 }
1931 | PRIORITY NUMBER {
1932 if (queue_opts.marker & QOM_PRIORITY) {
1933 yyerror("priority cannot be respecified");
1934 YYERROR;
1935 }
1936 if ($2 < 0 || $2 > 255) {
1937 yyerror("priority out of range: max 255");
1938 YYERROR;
1939 }
1940 queue_opts.marker |= QOM_PRIORITY;
1941 queue_opts.priority = $2;
1942 }
1943 | QLIMIT NUMBER {
1944 if (queue_opts.marker & QOM_QLIMIT) {
1945 yyerror("qlimit cannot be respecified");
1946 YYERROR;
1947 }
1948 if ($2 < 0 || $2 > 65535) {
1949 yyerror("qlimit out of range: max 65535");
1950 YYERROR;
1951 }
1952 queue_opts.marker |= QOM_QLIMIT;
1953 queue_opts.qlimit = $2;
1954 }
1955 | scheduler {
1956 if (queue_opts.marker & QOM_SCHEDULER) {
1957 yyerror("scheduler cannot be respecified");
1958 YYERROR;
1959 }
1960 queue_opts.marker |= QOM_SCHEDULER;
1961 queue_opts.scheduler = $1;
1962 }
1963 | TBRSIZE NUMBER {
1964 if (queue_opts.marker & QOM_TBRSIZE) {
1965 yyerror("tbrsize cannot be respecified");
1966 YYERROR;
1967 }
1968 if ($2 < 0 || $2 > UINT_MAX) {
1969 yyerror("tbrsize too big: max %u", UINT_MAX);
1970 YYERROR;
1971 }
1972 queue_opts.marker |= QOM_TBRSIZE;
1973 queue_opts.tbrsize = $2;
1974 }
1975 ;
1976
1977 bandwidth : STRING {
1978 double bps;
1979 char *cp;
1980
1981 $$.bw_percent = 0;
1982
1983 bps = strtod($1, &cp);
1984 if (cp != NULL) {
1985 if (strlen(cp) > 1) {
1986 char *cu = cp + 1;
1987 if (!strcmp(cu, "Bit") ||
1988 !strcmp(cu, "B") ||
1989 !strcmp(cu, "bit") ||
1990 !strcmp(cu, "b")) {
1991 *cu = 0;
1992 }
1993 }
1994 if (!strcmp(cp, "b"))
1995 ; /* nothing */
1996 else if (!strcmp(cp, "K"))
1997 bps *= 1000;
1998 else if (!strcmp(cp, "M"))
1999 bps *= 1000 * 1000;
2000 else if (!strcmp(cp, "G"))
2001 bps *= 1000 * 1000 * 1000;
2002 else if (!strcmp(cp, "%")) {
2003 if (bps < 0 || bps > 100) {
2004 yyerror("bandwidth spec "
2005 "out of range");
2006 free($1);
2007 YYERROR;
2008 }
2009 $$.bw_percent = bps;
2010 bps = 0;
2011 } else {
2012 yyerror("unknown unit %s", cp);
2013 free($1);
2014 YYERROR;
2015 }
2016 }
2017 free($1);
2018 $$.bw_absolute = (u_int64_t)bps;
2019 }
2020 | NUMBER {
2021 if ($1 < 0 || $1 >= LLONG_MAX) {
2022 yyerror("bandwidth number too big");
2023 YYERROR;
2024 }
2025 $$.bw_percent = 0;
2026 $$.bw_absolute = $1;
2027 }
2028 ;
2029
2030 scheduler : CBQ {
2031 $$.qtype = ALTQT_CBQ;
2032 $$.data.cbq_opts.flags = 0;
2033 }
2034 | CBQ '(' cbqflags_list ')' {
2035 $$.qtype = ALTQT_CBQ;
2036 $$.data.cbq_opts.flags = $3;
2037 }
2038 | PRIQ {
2039 $$.qtype = ALTQT_PRIQ;
2040 $$.data.priq_opts.flags = 0;
2041 }
2042 | PRIQ '(' priqflags_list ')' {
2043 $$.qtype = ALTQT_PRIQ;
2044 $$.data.priq_opts.flags = $3;
2045 }
2046 | HFSC {
2047 $$.qtype = ALTQT_HFSC;
2048 bzero(&$$.data.hfsc_opts,
2049 sizeof(struct node_hfsc_opts));
2050 }
2051 | HFSC '(' hfsc_opts ')' {
2052 $$.qtype = ALTQT_HFSC;
2053 $$.data.hfsc_opts = $3;
2054 }
2055 | FAIRQ {
2056 $$.qtype = ALTQT_FAIRQ;
2057 bzero(&$$.data.fairq_opts,
2058 sizeof(struct node_fairq_opts));
2059 }
2060 | FAIRQ '(' fairq_opts ')' {
2061 $$.qtype = ALTQT_FAIRQ;
2062 $$.data.fairq_opts = $3;
2063 }
2064 | CODEL {
2065 $$.qtype = ALTQT_CODEL;
2066 bzero(&$$.data.codel_opts,
2067 sizeof(struct codel_opts));
2068 }
2069 | CODEL '(' codel_opts ')' {
2070 $$.qtype = ALTQT_CODEL;
2071 $$.data.codel_opts = $3;
2072 }
2073 ;
2074
2075 cbqflags_list : cbqflags_item { $$ |= $1; }
2076 | cbqflags_list comma cbqflags_item { $$ |= $3; }
2077 ;
2078
2079 cbqflags_item : STRING {
2080 if (!strcmp($1, "default"))
2081 $$ = CBQCLF_DEFCLASS;
2082 else if (!strcmp($1, "borrow"))
2083 $$ = CBQCLF_BORROW;
2084 else if (!strcmp($1, "red"))
2085 $$ = CBQCLF_RED;
2086 else if (!strcmp($1, "ecn"))
2087 $$ = CBQCLF_RED|CBQCLF_ECN;
2088 else if (!strcmp($1, "rio"))
2089 $$ = CBQCLF_RIO;
2090 else if (!strcmp($1, "codel"))
2091 $$ = CBQCLF_CODEL;
2092 else {
2093 yyerror("unknown cbq flag \"%s\"", $1);
2094 free($1);
2095 YYERROR;
2096 }
2097 free($1);
2098 }
2099 ;
2100
2101 priqflags_list : priqflags_item { $$ |= $1; }
2102 | priqflags_list comma priqflags_item { $$ |= $3; }
2103 ;
2104
2105 priqflags_item : STRING {
2106 if (!strcmp($1, "default"))
2107 $$ = PRCF_DEFAULTCLASS;
2108 else if (!strcmp($1, "red"))
2109 $$ = PRCF_RED;
2110 else if (!strcmp($1, "ecn"))
2111 $$ = PRCF_RED|PRCF_ECN;
2112 else if (!strcmp($1, "rio"))
2113 $$ = PRCF_RIO;
2114 else if (!strcmp($1, "codel"))
2115 $$ = PRCF_CODEL;
2116 else {
2117 yyerror("unknown priq flag \"%s\"", $1);
2118 free($1);
2119 YYERROR;
2120 }
2121 free($1);
2122 }
2123 ;
2124
2125 hfsc_opts : {
2126 bzero(&hfsc_opts,
2127 sizeof(struct node_hfsc_opts));
2128 }
2129 hfscopts_list {
2130 $$ = hfsc_opts;
2131 }
2132 ;
2133
2134 hfscopts_list : hfscopts_item
2135 | hfscopts_list comma hfscopts_item
2136 ;
2137
2138 hfscopts_item : LINKSHARE bandwidth {
2139 if (hfsc_opts.linkshare.used) {
2140 yyerror("linkshare already specified");
2141 YYERROR;
2142 }
2143 hfsc_opts.linkshare.m2 = $2;
2144 hfsc_opts.linkshare.used = 1;
2145 }
2146 | LINKSHARE '(' bandwidth comma NUMBER comma bandwidth ')'
2147 {
2148 if ($5 < 0 || $5 > INT_MAX) {
2149 yyerror("timing in curve out of range");
2150 YYERROR;
2151 }
2152 if (hfsc_opts.linkshare.used) {
2153 yyerror("linkshare already specified");
2154 YYERROR;
2155 }
2156 hfsc_opts.linkshare.m1 = $3;
2157 hfsc_opts.linkshare.d = $5;
2158 hfsc_opts.linkshare.m2 = $7;
2159 hfsc_opts.linkshare.used = 1;
2160 }
2161 | REALTIME bandwidth {
2162 if (hfsc_opts.realtime.used) {
2163 yyerror("realtime already specified");
2164 YYERROR;
2165 }
2166 hfsc_opts.realtime.m2 = $2;
2167 hfsc_opts.realtime.used = 1;
2168 }
2169 | REALTIME '(' bandwidth comma NUMBER comma bandwidth ')'
2170 {
2171 if ($5 < 0 || $5 > INT_MAX) {
2172 yyerror("timing in curve out of range");
2173 YYERROR;
2174 }
2175 if (hfsc_opts.realtime.used) {
2176 yyerror("realtime already specified");
2177 YYERROR;
2178 }
2179 hfsc_opts.realtime.m1 = $3;
2180 hfsc_opts.realtime.d = $5;
2181 hfsc_opts.realtime.m2 = $7;
2182 hfsc_opts.realtime.used = 1;
2183 }
2184 | UPPERLIMIT bandwidth {
2185 if (hfsc_opts.upperlimit.used) {
2186 yyerror("upperlimit already specified");
2187 YYERROR;
2188 }
2189 hfsc_opts.upperlimit.m2 = $2;
2190 hfsc_opts.upperlimit.used = 1;
2191 }
2192 | UPPERLIMIT '(' bandwidth comma NUMBER comma bandwidth ')'
2193 {
2194 if ($5 < 0 || $5 > INT_MAX) {
2195 yyerror("timing in curve out of range");
2196 YYERROR;
2197 }
2198 if (hfsc_opts.upperlimit.used) {
2199 yyerror("upperlimit already specified");
2200 YYERROR;
2201 }
2202 hfsc_opts.upperlimit.m1 = $3;
2203 hfsc_opts.upperlimit.d = $5;
2204 hfsc_opts.upperlimit.m2 = $7;
2205 hfsc_opts.upperlimit.used = 1;
2206 }
2207 | STRING {
2208 if (!strcmp($1, "default"))
2209 hfsc_opts.flags |= HFCF_DEFAULTCLASS;
2210 else if (!strcmp($1, "red"))
2211 hfsc_opts.flags |= HFCF_RED;
2212 else if (!strcmp($1, "ecn"))
2213 hfsc_opts.flags |= HFCF_RED|HFCF_ECN;
2214 else if (!strcmp($1, "rio"))
2215 hfsc_opts.flags |= HFCF_RIO;
2216 else if (!strcmp($1, "codel"))
2217 hfsc_opts.flags |= HFCF_CODEL;
2218 else {
2219 yyerror("unknown hfsc flag \"%s\"", $1);
2220 free($1);
2221 YYERROR;
2222 }
2223 free($1);
2224 }
2225 ;
2226
2227 fairq_opts : {
2228 bzero(&fairq_opts,
2229 sizeof(struct node_fairq_opts));
2230 }
2231 fairqopts_list {
2232 $$ = fairq_opts;
2233 }
2234 ;
2235
2236 fairqopts_list : fairqopts_item
2237 | fairqopts_list comma fairqopts_item
2238 ;
2239
2240 fairqopts_item : LINKSHARE bandwidth {
2241 if (fairq_opts.linkshare.used) {
2242 yyerror("linkshare already specified");
2243 YYERROR;
2244 }
2245 fairq_opts.linkshare.m2 = $2;
2246 fairq_opts.linkshare.used = 1;
2247 }
2248 | LINKSHARE '(' bandwidth number bandwidth ')' {
2249 if (fairq_opts.linkshare.used) {
2250 yyerror("linkshare already specified");
2251 YYERROR;
2252 }
2253 fairq_opts.linkshare.m1 = $3;
2254 fairq_opts.linkshare.d = $4;
2255 fairq_opts.linkshare.m2 = $5;
2256 fairq_opts.linkshare.used = 1;
2257 }
2258 | HOGS bandwidth {
2259 fairq_opts.hogs_bw = $2;
2260 }
2261 | BUCKETS number {
2262 fairq_opts.nbuckets = $2;
2263 }
2264 | STRING {
2265 if (!strcmp($1, "default"))
2266 fairq_opts.flags |= FARF_DEFAULTCLASS;
2267 else if (!strcmp($1, "red"))
2268 fairq_opts.flags |= FARF_RED;
2269 else if (!strcmp($1, "ecn"))
2270 fairq_opts.flags |= FARF_RED|FARF_ECN;
2271 else if (!strcmp($1, "rio"))
2272 fairq_opts.flags |= FARF_RIO;
2273 else if (!strcmp($1, "codel"))
2274 fairq_opts.flags |= FARF_CODEL;
2275 else {
2276 yyerror("unknown fairq flag \"%s\"", $1);
2277 free($1);
2278 YYERROR;
2279 }
2280 free($1);
2281 }
2282 ;
2283
2284 codel_opts : {
2285 bzero(&codel_opts,
2286 sizeof(struct codel_opts));
2287 }
2288 codelopts_list {
2289 $$ = codel_opts;
2290 }
2291 ;
2292
2293 codelopts_list : codelopts_item
2294 | codelopts_list comma codelopts_item
2295 ;
2296
2297 codelopts_item : INTERVAL number {
2298 if (codel_opts.interval) {
2299 yyerror("interval already specified");
2300 YYERROR;
2301 }
2302 codel_opts.interval = $2;
2303 }
2304 | TARGET number {
2305 if (codel_opts.target) {
2306 yyerror("target already specified");
2307 YYERROR;
2308 }
2309 codel_opts.target = $2;
2310 }
2311 | STRING {
2312 if (!strcmp($1, "ecn"))
2313 codel_opts.ecn = 1;
2314 else {
2315 yyerror("unknown codel option \"%s\"", $1);
2316 free($1);
2317 YYERROR;
2318 }
2319 free($1);
2320 }
2321 ;
2322
2323 qassign : /* empty */ { $$ = NULL; }
2324 | qassign_item { $$ = $1; }
2325 | '{' optnl qassign_list '}' { $$ = $3; }
2326 ;
2327
2328 qassign_list : qassign_item optnl { $$ = $1; }
2329 | qassign_list comma qassign_item optnl {
2330 $1->tail->next = $3;
2331 $1->tail = $3;
2332 $$ = $1;
2333 }
2334 ;
2335
2336 qassign_item : STRING {
2337 $$ = calloc(1, sizeof(struct node_queue));
2338 if ($$ == NULL)
2339 err(1, "qassign_item: calloc");
2340 if (strlcpy($$->queue, $1, sizeof($$->queue)) >=
2341 sizeof($$->queue)) {
2342 yyerror("queue name '%s' too long (max "
2343 "%d chars)", $1, sizeof($$->queue)-1);
2344 free($1);
2345 free($$);
2346 YYERROR;
2347 }
2348 free($1);
2349 $$->next = NULL;
2350 $$->tail = $$;
2351 }
2352 ;
2353
2354 pfrule : action dir logquick interface route af proto fromto
2355 filter_opts
2356 {
2357 struct pfctl_rule r;
2358 struct node_state_opt *o;
2359 struct node_proto *proto;
2360 int srctrack = 0;
2361 int statelock = 0;
2362 int adaptive = 0;
2363 int defaults = 0;
2364
2365 if (check_rulestate(PFCTL_STATE_FILTER))
2366 YYERROR;
2367
2368 pfctl_init_rule(&r);
2369
2370 r.action = $1.b1;
2371 switch ($1.b2) {
2372 case PFRULE_RETURNRST:
2373 r.rule_flag |= PFRULE_RETURNRST;
2374 r.return_ttl = $1.w;
2375 break;
2376 case PFRULE_RETURNICMP:
2377 r.rule_flag |= PFRULE_RETURNICMP;
2378 r.return_icmp = $1.w;
2379 r.return_icmp6 = $1.w2;
2380 break;
2381 case PFRULE_RETURN:
2382 r.rule_flag |= PFRULE_RETURN;
2383 r.return_icmp = $1.w;
2384 r.return_icmp6 = $1.w2;
2385 break;
2386 }
2387 r.direction = $2;
2388 r.log = $3.log;
2389 r.logif = $3.logif;
2390 r.quick = $3.quick;
2391 r.af = $6;
2392
2393 if (filteropts_to_rule(&r, &$9))
2394 YYERROR;
2395
2396 if ($9.flags.b1 || $9.flags.b2 || $8.src_os) {
2397 for (proto = $7; proto != NULL &&
2398 proto->proto != IPPROTO_TCP;
2399 proto = proto->next)
2400 ; /* nothing */
2401 if (proto == NULL && $7 != NULL) {
2402 if ($9.flags.b1 || $9.flags.b2)
2403 yyerror(
2404 "flags only apply to tcp");
2405 if ($8.src_os)
2406 yyerror(
2407 "OS fingerprinting only "
2408 "apply to tcp");
2409 YYERROR;
2410 }
2411 }
2412
2413 o = $9.keep.options;
2414
2415 /* 'keep state' by default on pass rules. */
2416 if (!r.keep_state && !r.action &&
2417 !($9.marker & FOM_KEEP)) {
2418 r.keep_state = PF_STATE_NORMAL;
2419 o = keep_state_defaults;
2420 defaults = 1;
2421 }
2422
2423 while (o) {
2424 struct node_state_opt *p = o;
2425
2426 switch (o->type) {
2427 case PF_STATE_OPT_MAX:
2428 if (r.max_states) {
2429 yyerror("state option 'max' "
2430 "multiple definitions");
2431 YYERROR;
2432 }
2433 r.max_states = o->data.max_states;
2434 break;
2435 case PF_STATE_OPT_NOSYNC:
2436 if (r.rule_flag & PFRULE_NOSYNC) {
2437 yyerror("state option 'sync' "
2438 "multiple definitions");
2439 YYERROR;
2440 }
2441 r.rule_flag |= PFRULE_NOSYNC;
2442 break;
2443 case PF_STATE_OPT_SRCTRACK:
2444 if (srctrack) {
2445 yyerror("state option "
2446 "'source-track' "
2447 "multiple definitions");
2448 YYERROR;
2449 }
2450 srctrack = o->data.src_track;
2451 r.rule_flag |= PFRULE_SRCTRACK;
2452 break;
2453 case PF_STATE_OPT_MAX_SRC_STATES:
2454 if (r.max_src_states) {
2455 yyerror("state option "
2456 "'max-src-states' "
2457 "multiple definitions");
2458 YYERROR;
2459 }
2460 if (o->data.max_src_states == 0) {
2461 yyerror("'max-src-states' must "
2462 "be > 0");
2463 YYERROR;
2464 }
2465 r.max_src_states =
2466 o->data.max_src_states;
2467 r.rule_flag |= PFRULE_SRCTRACK;
2468 break;
2469 case PF_STATE_OPT_OVERLOAD:
2470 if (r.overload_tblname[0]) {
2471 yyerror("multiple 'overload' "
2472 "table definitions");
2473 YYERROR;
2474 }
2475 if (strlcpy(r.overload_tblname,
2476 o->data.overload.tblname,
2477 PF_TABLE_NAME_SIZE) >=
2478 PF_TABLE_NAME_SIZE) {
2479 yyerror("state option: "
2480 "strlcpy");
2481 YYERROR;
2482 }
2483 r.flush = o->data.overload.flush;
2484 break;
2485 case PF_STATE_OPT_MAX_SRC_CONN:
2486 if (r.max_src_conn) {
2487 yyerror("state option "
2488 "'max-src-conn' "
2489 "multiple definitions");
2490 YYERROR;
2491 }
2492 if (o->data.max_src_conn == 0) {
2493 yyerror("'max-src-conn' "
2494 "must be > 0");
2495 YYERROR;
2496 }
2497 r.max_src_conn =
2498 o->data.max_src_conn;
2499 r.rule_flag |= PFRULE_SRCTRACK |
2500 PFRULE_RULESRCTRACK;
2501 break;
2502 case PF_STATE_OPT_MAX_SRC_CONN_RATE:
2503 if (r.max_src_conn_rate.limit) {
2504 yyerror("state option "
2505 "'max-src-conn-rate' "
2506 "multiple definitions");
2507 YYERROR;
2508 }
2509 if (!o->data.max_src_conn_rate.limit ||
2510 !o->data.max_src_conn_rate.seconds) {
2511 yyerror("'max-src-conn-rate' "
2512 "values must be > 0");
2513 YYERROR;
2514 }
2515 if (o->data.max_src_conn_rate.limit >
2516 PF_THRESHOLD_MAX) {
2517 yyerror("'max-src-conn-rate' "
2518 "maximum rate must be < %u",
2519 PF_THRESHOLD_MAX);
2520 YYERROR;
2521 }
2522 r.max_src_conn_rate.limit =
2523 o->data.max_src_conn_rate.limit;
2524 r.max_src_conn_rate.seconds =
2525 o->data.max_src_conn_rate.seconds;
2526 r.rule_flag |= PFRULE_SRCTRACK |
2527 PFRULE_RULESRCTRACK;
2528 break;
2529 case PF_STATE_OPT_MAX_SRC_NODES:
2530 if (r.max_src_nodes) {
2531 yyerror("state option "
2532 "'max-src-nodes' "
2533 "multiple definitions");
2534 YYERROR;
2535 }
2536 if (o->data.max_src_nodes == 0) {
2537 yyerror("'max-src-nodes' must "
2538 "be > 0");
2539 YYERROR;
2540 }
2541 r.max_src_nodes =
2542 o->data.max_src_nodes;
2543 r.rule_flag |= PFRULE_SRCTRACK |
2544 PFRULE_RULESRCTRACK;
2545 break;
2546 case PF_STATE_OPT_STATELOCK:
2547 if (statelock) {
2548 yyerror("state locking option: "
2549 "multiple definitions");
2550 YYERROR;
2551 }
2552 statelock = 1;
2553 r.rule_flag |= o->data.statelock;
2554 break;
2555 case PF_STATE_OPT_SLOPPY:
2556 if (r.rule_flag & PFRULE_STATESLOPPY) {
2557 yyerror("state sloppy option: "
2558 "multiple definitions");
2559 YYERROR;
2560 }
2561 r.rule_flag |= PFRULE_STATESLOPPY;
2562 break;
2563 case PF_STATE_OPT_PFLOW:
2564 if (r.rule_flag & PFRULE_PFLOW) {
2565 yyerror("state pflow option: "
2566 "multiple definitions");
2567 YYERROR;
2568 }
2569 r.rule_flag |= PFRULE_PFLOW;
2570 break;
2571 case PF_STATE_OPT_ALLOW_RELATED:
2572 if (r.rule_flag & PFRULE_ALLOW_RELATED) {
2573 yyerror("state allow-related option: "
2574 "multiple definitions");
2575 YYERROR;
2576 }
2577 r.rule_flag |= PFRULE_ALLOW_RELATED;
2578 break;
2579 case PF_STATE_OPT_TIMEOUT:
2580 if (o->data.timeout.number ==
2581 PFTM_ADAPTIVE_START ||
2582 o->data.timeout.number ==
2583 PFTM_ADAPTIVE_END)
2584 adaptive = 1;
2585 if (r.timeout[o->data.timeout.number]) {
2586 yyerror("state timeout %s "
2587 "multiple definitions",
2588 pf_timeouts[o->data.
2589 timeout.number].name);
2590 YYERROR;
2591 }
2592 r.timeout[o->data.timeout.number] =
2593 o->data.timeout.seconds;
2594 }
2595 o = o->next;
2596 if (!defaults)
2597 free(p);
2598 }
2599
2600 /* 'flags S/SA' by default on stateful rules */
2601 if (!r.action && !r.flags && !r.flagset &&
2602 !$9.fragment && !($9.marker & FOM_FLAGS) &&
2603 r.keep_state) {
2604 r.flags = parse_flags("S");
2605 r.flagset = parse_flags("SA");
2606 }
2607 if (!adaptive && r.max_states) {
2608 r.timeout[PFTM_ADAPTIVE_START] =
2609 (r.max_states / 10) * 6;
2610 r.timeout[PFTM_ADAPTIVE_END] =
2611 (r.max_states / 10) * 12;
2612 }
2613 if (r.rule_flag & PFRULE_SRCTRACK) {
2614 if (srctrack == PF_SRCTRACK_GLOBAL &&
2615 r.max_src_nodes) {
2616 yyerror("'max-src-nodes' is "
2617 "incompatible with "
2618 "'source-track global'");
2619 YYERROR;
2620 }
2621 if (srctrack == PF_SRCTRACK_GLOBAL &&
2622 r.max_src_conn) {
2623 yyerror("'max-src-conn' is "
2624 "incompatible with "
2625 "'source-track global'");
2626 YYERROR;
2627 }
2628 if (srctrack == PF_SRCTRACK_GLOBAL &&
2629 r.max_src_conn_rate.seconds) {
2630 yyerror("'max-src-conn-rate' is "
2631 "incompatible with "
2632 "'source-track global'");
2633 YYERROR;
2634 }
2635 if (r.timeout[PFTM_SRC_NODE] <
2636 r.max_src_conn_rate.seconds)
2637 r.timeout[PFTM_SRC_NODE] =
2638 r.max_src_conn_rate.seconds;
2639 r.rule_flag |= PFRULE_SRCTRACK;
2640 if (srctrack == PF_SRCTRACK_RULE)
2641 r.rule_flag |= PFRULE_RULESRCTRACK;
2642 }
2643 if (r.keep_state && !statelock)
2644 r.rule_flag |= default_statelock;
2645
2646 decide_address_family($8.src.host, &r.af);
2647 decide_address_family($8.dst.host, &r.af);
2648
2649 if ($5.rt) {
2650 if (!r.direction) {
2651 yyerror("direction must be explicit "
2652 "with rules that specify routing");
2653 YYERROR;
2654 }
2655 r.rt = $5.rt;
2656
2657 if (!($5.redirspec->pool_opts.opts & PF_POOL_IPV6NH)) {
2658 decide_address_family($5.redirspec->host, &r.af);
2659 if (!(r.rule_flag & PFRULE_AFTO))
2660 remove_invalid_hosts(&($5.redirspec->host), &r.af);
2661 if ($5.redirspec->host == NULL) {
2662 yyerror("no routing address with "
2663 "matching address family found.");
2664 YYERROR;
2665 }
2666 }
2667 }
2668 #ifdef __FreeBSD__
2669 r.divert.port = $9.divert.port;
2670 #else
2671 if ((r.divert.port = $9.divert.port)) {
2672 if (r.direction == PF_OUT) {
2673 if ($9.divert.addr) {
2674 yyerror("address specified "
2675 "for outgoing divert");
2676 YYERROR;
2677 }
2678 bzero(&r.divert.addr,
2679 sizeof(r.divert.addr));
2680 } else {
2681 if (!$9.divert.addr) {
2682 yyerror("no address specified "
2683 "for incoming divert");
2684 YYERROR;
2685 }
2686 if ($9.divert.addr->af != r.af) {
2687 yyerror("address family "
2688 "mismatch for divert");
2689 YYERROR;
2690 }
2691 r.divert.addr =
2692 $9.divert.addr->addr.v.a.addr;
2693 }
2694 }
2695 #endif
2696
2697 if ($9.dnpipe || $9.dnrpipe) {
2698 r.dnpipe = $9.dnpipe;
2699 r.dnrpipe = $9.dnrpipe;
2700 if ($9.free_flags & PFRULE_DN_IS_PIPE)
2701 r.free_flags |= PFRULE_DN_IS_PIPE;
2702 else
2703 r.free_flags |= PFRULE_DN_IS_QUEUE;
2704 }
2705
2706 if ($9.marker & FOM_AFTO) {
2707 r.naf = $9.nat->af;
2708 } else {
2709 if ($9.nat) {
2710 if (!r.af && ! $9.nat->host->ifindex)
2711 r.af = $9.nat->host->af;
2712 remove_invalid_hosts(&($9.nat->host), &r.af);
2713 if (invalid_redirect($9.nat->host, r.af))
2714 YYERROR;
2715 if ($9.nat->host->addr.type == PF_ADDR_DYNIFTL) {
2716 if (($9.nat->host = gen_dynnode($9.nat->host, r.af)) == NULL)
2717 err(1, "calloc");
2718 }
2719 if (check_netmask($9.nat->host, r.af))
2720 YYERROR;
2721 }
2722 if ($9.rdr) {
2723 if (!r.af && ! $9.rdr->host->ifindex)
2724 r.af = $9.rdr->host->af;
2725 remove_invalid_hosts(&($9.rdr->host), &r.af);
2726 if (invalid_redirect($9.rdr->host, r.af))
2727 YYERROR;
2728 if ($9.rdr->host->addr.type == PF_ADDR_DYNIFTL) {
2729 if (($9.rdr->host = gen_dynnode($9.rdr->host, r.af)) == NULL)
2730 err(1, "calloc");
2731 }
2732 if (check_netmask($9.rdr->host, r.af))
2733 YYERROR;
2734 }
2735 }
2736
2737 expand_rule(&r, false, $4, $9.nat, $9.rdr, $5.redirspec,
2738 $7, $8.src_os, $8.src.host, $8.src.port, $8.dst.host,
2739 $8.dst.port, $9.uid, $9.gid, $9.rcv, $9.icmpspec, "");
2740 }
2741 ;
2742
2743 filter_opts : {
2744 bzero(&filter_opts, sizeof filter_opts);
2745 filter_opts.rtableid = -1;
2746 }
2747 filter_opts_l
2748 { $$ = filter_opts; }
2749 | /* empty */ {
2750 bzero(&filter_opts, sizeof filter_opts);
2751 filter_opts.rtableid = -1;
2752 $$ = filter_opts;
2753 }
2754 ;
2755
2756 filter_opts_l : filter_opts_l filter_opt
2757 | filter_opt
2758 ;
2759
2760 filter_opt : USER uids {
2761 if (filter_opts.uid)
2762 $2->tail->next = filter_opts.uid;
2763 filter_opts.uid = $2;
2764 }
2765 | GROUP gids {
2766 if (filter_opts.gid)
2767 $2->tail->next = filter_opts.gid;
2768 filter_opts.gid = $2;
2769 }
2770 | flags {
2771 if (filter_opts.marker & FOM_FLAGS) {
2772 yyerror("flags cannot be redefined");
2773 YYERROR;
2774 }
2775 filter_opts.marker |= FOM_FLAGS;
2776 filter_opts.flags.b1 |= $1.b1;
2777 filter_opts.flags.b2 |= $1.b2;
2778 filter_opts.flags.w |= $1.w;
2779 filter_opts.flags.w2 |= $1.w2;
2780 }
2781 | icmpspec {
2782 if (filter_opts.marker & FOM_ICMP) {
2783 yyerror("icmp-type cannot be redefined");
2784 YYERROR;
2785 }
2786 filter_opts.marker |= FOM_ICMP;
2787 filter_opts.icmpspec = $1;
2788 }
2789 | PRIO NUMBER {
2790 if (filter_opts.marker & FOM_PRIO) {
2791 yyerror("prio cannot be redefined");
2792 YYERROR;
2793 }
2794 if ($2 < 0 || $2 > PF_PRIO_MAX) {
2795 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
2796 YYERROR;
2797 }
2798 filter_opts.marker |= FOM_PRIO;
2799 filter_opts.prio = $2;
2800 }
2801 | TOS tos {
2802 if (filter_opts.marker & FOM_TOS) {
2803 yyerror("tos cannot be redefined");
2804 YYERROR;
2805 }
2806 filter_opts.marker |= FOM_TOS;
2807 filter_opts.tos = $2;
2808 }
2809 | keep {
2810 if (filter_opts.marker & FOM_KEEP) {
2811 yyerror("modulate or keep cannot be redefined");
2812 YYERROR;
2813 }
2814 filter_opts.marker |= FOM_KEEP;
2815 filter_opts.keep.action = $1.action;
2816 filter_opts.keep.options = $1.options;
2817 }
2818 | RIDENTIFIER number {
2819 filter_opts.ridentifier = $2;
2820 }
2821 | FRAGMENT {
2822 filter_opts.fragment = 1;
2823 }
2824 | ALLOWOPTS {
2825 filter_opts.allowopts = 1;
2826 }
2827 | label {
2828 if (filter_opts.labelcount >= PF_RULE_MAX_LABEL_COUNT) {
2829 yyerror("label can only be used %d times", PF_RULE_MAX_LABEL_COUNT);
2830 YYERROR;
2831 }
2832 filter_opts.label[filter_opts.labelcount++] = $1;
2833 }
2834 | qname {
2835 if (filter_opts.queues.qname) {
2836 yyerror("queue cannot be redefined");
2837 YYERROR;
2838 }
2839 filter_opts.queues = $1;
2840 }
2841 | DNPIPE number {
2842 filter_opts.dnpipe = $2;
2843 filter_opts.free_flags |= PFRULE_DN_IS_PIPE;
2844 }
2845 | DNPIPE '(' number ')' {
2846 filter_opts.dnpipe = $3;
2847 filter_opts.free_flags |= PFRULE_DN_IS_PIPE;
2848 }
2849 | DNPIPE '(' number comma number ')' {
2850 filter_opts.dnrpipe = $5;
2851 filter_opts.dnpipe = $3;
2852 filter_opts.free_flags |= PFRULE_DN_IS_PIPE;
2853 }
2854 | DNQUEUE number {
2855 filter_opts.dnpipe = $2;
2856 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE;
2857 }
2858 | DNQUEUE '(' number comma number ')' {
2859 filter_opts.dnrpipe = $5;
2860 filter_opts.dnpipe = $3;
2861 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE;
2862 }
2863 | DNQUEUE '(' number ')' {
2864 filter_opts.dnpipe = $3;
2865 filter_opts.free_flags |= PFRULE_DN_IS_QUEUE;
2866 }
2867 | TAG string {
2868 filter_opts.tag = $2;
2869 }
2870 | not TAGGED string {
2871 filter_opts.match_tag = $3;
2872 filter_opts.match_tag_not = $1;
2873 }
2874 | not RECEIVEDON if_item {
2875 if (filter_opts.rcv) {
2876 yyerror("cannot respecify received-on");
2877 YYERROR;
2878 }
2879 filter_opts.rcv = $3;
2880 filter_opts.rcv->not = $1;
2881 }
2882 | PROBABILITY probability {
2883 double p;
2884
2885 p = floor($2 * UINT_MAX + 0.5);
2886 if (p < 0.0 || p > UINT_MAX) {
2887 yyerror("invalid probability: %lf", p);
2888 YYERROR;
2889 }
2890 filter_opts.prob = (u_int32_t)p;
2891 if (filter_opts.prob == 0)
2892 filter_opts.prob = 1;
2893 }
2894 | RTABLE NUMBER {
2895 if ($2 < 0 || $2 > rt_tableid_max()) {
2896 yyerror("invalid rtable id");
2897 YYERROR;
2898 }
2899 filter_opts.rtableid = $2;
2900 }
2901 | DIVERTTO portplain {
2902 #ifdef __FreeBSD__
2903 filter_opts.divert.port = $2.a;
2904 if (!filter_opts.divert.port) {
2905 yyerror("invalid divert port: %u", ntohs($2.a));
2906 YYERROR;
2907 }
2908 #endif
2909 }
2910 | DIVERTTO STRING PORT portplain {
2911 #ifndef __FreeBSD__
2912 if ((filter_opts.divert.addr = host($2, pf->opts)) == NULL) {
2913 yyerror("could not parse divert address: %s",
2914 $2);
2915 free($2);
2916 YYERROR;
2917 }
2918 #else
2919 if ($2)
2920 #endif
2921 free($2);
2922 filter_opts.divert.port = $4.a;
2923 if (!filter_opts.divert.port) {
2924 yyerror("invalid divert port: %u", ntohs($4.a));
2925 YYERROR;
2926 }
2927 }
2928 | DIVERTREPLY {
2929 #ifdef __FreeBSD__
2930 yyerror("divert-reply has no meaning in FreeBSD pf(4)");
2931 YYERROR;
2932 #else
2933 filter_opts.divert.port = 1; /* some random value */
2934 #endif
2935 }
2936 | SCRUB '(' scrub_opts ')' {
2937 filter_opts.nodf = $3.nodf;
2938 filter_opts.minttl = $3.minttl;
2939 if ($3.marker & FOM_SETTOS) {
2940 /* Old style rules are "scrub set-tos 0x42"
2941 * New style are "set tos 0x42 scrub (...)"
2942 * What is in "scrub(...)"" is unfortunately the
2943 * original scrub syntax so it would overwrite
2944 * "set tos" of a pass/match rule.
2945 */
2946 filter_opts.settos = $3.settos;
2947 }
2948 filter_opts.randomid = $3.randomid;
2949 filter_opts.max_mss = $3.maxmss;
2950 if ($3.reassemble_tcp)
2951 filter_opts.marker |= FOM_SCRUB_TCP;
2952 filter_opts.marker |= $3.marker;
2953 }
2954 | NATTO port_redirspec {
2955 if (filter_opts.nat) {
2956 yyerror("cannot respecify nat-to/binat-to");
2957 YYERROR;
2958 }
2959 filter_opts.nat = $2;
2960 }
2961 | RDRTO port_redirspec {
2962 if (filter_opts.rdr) {
2963 yyerror("cannot respecify rdr-to");
2964 YYERROR;
2965 }
2966 filter_opts.rdr = $2;
2967 }
2968 | BINATTO port_redirspec {
2969 if (filter_opts.nat) {
2970 yyerror("cannot respecify nat-to/binat-to");
2971 YYERROR;
2972 }
2973 filter_opts.nat = $2;
2974 filter_opts.nat->binat = 1;
2975 filter_opts.nat->pool_opts.staticport = 1;
2976 }
2977 | AFTO af FROM port_redirspec {
2978 if (filter_opts.nat) {
2979 yyerror("cannot respecify af-to");
2980 YYERROR;
2981 }
2982 if ($2 == 0) {
2983 yyerror("no address family specified");
2984 YYERROR;
2985 }
2986
2987 filter_opts.nat = $4;
2988 filter_opts.nat->af = $2;
2989 remove_invalid_hosts(&($4->host), &(filter_opts.nat->af));
2990 if ($4->host == NULL) {
2991 yyerror("af-to addresses must be in the "
2992 "target address family");
2993 YYERROR;
2994 }
2995 filter_opts.marker |= FOM_AFTO;
2996 }
2997 | AFTO af FROM port_redirspec TO port_redirspec {
2998 if (filter_opts.nat) {
2999 yyerror("cannot respecify af-to");
3000 YYERROR;
3001 }
3002 if ($2 == 0) {
3003 yyerror("no address family specified");
3004 YYERROR;
3005 }
3006 filter_opts.nat = $4;
3007 filter_opts.nat->af = $2;
3008 filter_opts.rdr = $6;
3009 filter_opts.rdr->af = $2;
3010 remove_invalid_hosts(&($4->host), &(filter_opts.nat->af));
3011 remove_invalid_hosts(&($6->host), &(filter_opts.rdr->af));
3012 if ($4->host == NULL || $6->host == NULL) {
3013 yyerror("af-to addresses must be in the "
3014 "target address family");
3015 YYERROR;
3016 }
3017 filter_opts.marker |= FOM_AFTO;
3018 }
3019 | MAXPKTRATE NUMBER '/' NUMBER {
3020 if ($2 < 0 || $2 > UINT_MAX ||
3021 $4 < 0 || $4 > UINT_MAX) {
3022 yyerror("only positive values permitted");
3023 YYERROR;
3024 }
3025 if (filter_opts.pktrate.limit) {
3026 yyerror("cannot respecify max-pkt-rate");
3027 YYERROR;
3028 }
3029 filter_opts.pktrate.limit = $2;
3030 filter_opts.pktrate.seconds = $4;
3031 }
3032 | MAXPKTSIZE NUMBER {
3033 if ($2 < 0 || $2 > UINT16_MAX) {
3034 yyerror("only positive values permitted");
3035 YYERROR;
3036 }
3037 filter_opts.max_pkt_size = $2;
3038 }
3039 | filter_sets
3040 ;
3041
3042 filter_sets : SET '(' filter_sets_l ')' { $$ = filter_opts; }
3043 | SET filter_set { $$ = filter_opts; }
3044 ;
3045
3046 filter_sets_l : filter_sets_l comma filter_set
3047 | filter_set
3048 ;
3049
3050 filter_set : prio {
3051 if (filter_opts.marker & FOM_SETPRIO) {
3052 yyerror("prio cannot be redefined");
3053 YYERROR;
3054 }
3055 filter_opts.marker |= FOM_SETPRIO;
3056 filter_opts.set_prio[0] = $1.b1;
3057 filter_opts.set_prio[1] = $1.b2;
3058 }
3059 | TOS tos {
3060 if (filter_opts.marker & FOM_SETTOS) {
3061 yyerror("tos cannot be respecified");
3062 YYERROR;
3063 }
3064 filter_opts.marker |= FOM_SETTOS;
3065 filter_opts.settos = $2;
3066 }
3067 prio : PRIO NUMBER {
3068 if ($2 < 0 || $2 > PF_PRIO_MAX) {
3069 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
3070 YYERROR;
3071 }
3072 $$.b1 = $$.b2 = $2;
3073 }
3074 | PRIO '(' NUMBER comma NUMBER ')' {
3075 if ($3 < 0 || $3 > PF_PRIO_MAX ||
3076 $5 < 0 || $5 > PF_PRIO_MAX) {
3077 yyerror("prio must be 0 - %u", PF_PRIO_MAX);
3078 YYERROR;
3079 }
3080 $$.b1 = $3;
3081 $$.b2 = $5;
3082 }
3083 ;
3084
3085 probability : STRING {
3086 char *e;
3087 double p = strtod($1, &e);
3088
3089 if (*e == '%') {
3090 p *= 0.01;
3091 e++;
3092 }
3093 if (*e) {
3094 yyerror("invalid probability: %s", $1);
3095 free($1);
3096 YYERROR;
3097 }
3098 free($1);
3099 $$ = p;
3100 }
3101 | NUMBER {
3102 $$ = (double)$1;
3103 }
3104 ;
3105
3106
3107 action : PASS {
3108 $$.b1 = PF_PASS;
3109 $$.b2 = failpolicy;
3110 $$.w = returnicmpdefault;
3111 $$.w2 = returnicmp6default;
3112 }
3113 | MATCH { $$.b1 = PF_MATCH; $$.b2 = $$.w = 0; }
3114 | BLOCK blockspec { $$ = $2; $$.b1 = PF_DROP; }
3115 ;
3116
3117 blockspec : /* empty */ {
3118 $$.b2 = blockpolicy;
3119 $$.w = returnicmpdefault;
3120 $$.w2 = returnicmp6default;
3121 }
3122 | DROP {
3123 $$.b2 = PFRULE_DROP;
3124 $$.w = 0;
3125 $$.w2 = 0;
3126 }
3127 | RETURNRST {
3128 $$.b2 = PFRULE_RETURNRST;
3129 $$.w = 0;
3130 $$.w2 = 0;
3131 }
3132 | RETURNRST '(' TTL NUMBER ')' {
3133 if ($4 < 0 || $4 > 255) {
3134 yyerror("illegal ttl value %d", $4);
3135 YYERROR;
3136 }
3137 $$.b2 = PFRULE_RETURNRST;
3138 $$.w = $4;
3139 $$.w2 = 0;
3140 }
3141 | RETURNICMP {
3142 $$.b2 = PFRULE_RETURNICMP;
3143 $$.w = returnicmpdefault;
3144 $$.w2 = returnicmp6default;
3145 }
3146 | RETURNICMP6 {
3147 $$.b2 = PFRULE_RETURNICMP;
3148 $$.w = returnicmpdefault;
3149 $$.w2 = returnicmp6default;
3150 }
3151 | RETURNICMP '(' reticmpspec ')' {
3152 $$.b2 = PFRULE_RETURNICMP;
3153 $$.w = $3;
3154 $$.w2 = returnicmpdefault;
3155 }
3156 | RETURNICMP6 '(' reticmp6spec ')' {
3157 $$.b2 = PFRULE_RETURNICMP;
3158 $$.w = returnicmpdefault;
3159 $$.w2 = $3;
3160 }
3161 | RETURNICMP '(' reticmpspec comma reticmp6spec ')' {
3162 $$.b2 = PFRULE_RETURNICMP;
3163 $$.w = $3;
3164 $$.w2 = $5;
3165 }
3166 | RETURN {
3167 $$.b2 = PFRULE_RETURN;
3168 $$.w = returnicmpdefault;
3169 $$.w2 = returnicmp6default;
3170 }
3171 ;
3172
3173 reticmpspec : STRING {
3174 if (!($$ = parseicmpspec($1, AF_INET))) {
3175 free($1);
3176 YYERROR;
3177 }
3178 free($1);
3179 }
3180 | NUMBER {
3181 u_int8_t icmptype;
3182
3183 if ($1 < 0 || $1 > 255) {
3184 yyerror("invalid icmp code %lu", $1);
3185 YYERROR;
3186 }
3187 icmptype = returnicmpdefault >> 8;
3188 $$ = (icmptype << 8 | $1);
3189 }
3190 ;
3191
3192 reticmp6spec : STRING {
3193 if (!($$ = parseicmpspec($1, AF_INET6))) {
3194 free($1);
3195 YYERROR;
3196 }
3197 free($1);
3198 }
3199 | NUMBER {
3200 u_int8_t icmptype;
3201
3202 if ($1 < 0 || $1 > 255) {
3203 yyerror("invalid icmp code %lu", $1);
3204 YYERROR;
3205 }
3206 icmptype = returnicmp6default >> 8;
3207 $$ = (icmptype << 8 | $1);
3208 }
3209 ;
3210
3211 dir : /* empty */ { $$ = PF_INOUT; }
3212 | IN { $$ = PF_IN; }
3213 | OUT { $$ = PF_OUT; }
3214 ;
3215
3216 quick : /* empty */ { $$.quick = 0; }
3217 | QUICK { $$.quick = 1; }
3218 ;
3219
3220 logquick : /* empty */ { $$.log = 0; $$.quick = 0; $$.logif = 0; }
3221 | log { $$ = $1; $$.quick = 0; }
3222 | QUICK { $$.quick = 1; $$.log = 0; $$.logif = 0; }
3223 | log QUICK { $$ = $1; $$.quick = 1; }
3224 | QUICK log { $$ = $2; $$.quick = 1; }
3225 ;
3226
3227 log : LOG { $$.log = PF_LOG; $$.logif = 0; }
3228 | LOG '(' logopts ')' {
3229 $$.log = PF_LOG | $3.log;
3230 $$.logif = $3.logif;
3231 }
3232 ;
3233
3234 logopts : logopt { $$ = $1; }
3235 | logopts comma logopt {
3236 $$.log = $1.log | $3.log;
3237 $$.logif = $3.logif;
3238 if ($$.logif == 0)
3239 $$.logif = $1.logif;
3240 }
3241 ;
3242
3243 logopt : ALL { $$.log = PF_LOG_ALL; $$.logif = 0; }
3244 | MATCHES { $$.log = PF_LOG_MATCHES; $$.logif = 0; }
3245 | USER { $$.log = PF_LOG_USER; $$.logif = 0; }
3246 | TO string {
3247 const char *errstr;
3248 u_int i;
3249
3250 $$.log = 0;
3251 if (strncmp($2, "pflog", 5)) {
3252 yyerror("%s: should be a pflog interface", $2);
3253 free($2);
3254 YYERROR;
3255 }
3256 i = strtonum($2 + 5, 0, 255, &errstr);
3257 if (errstr) {
3258 yyerror("%s: %s", $2, errstr);
3259 free($2);
3260 YYERROR;
3261 }
3262 free($2);
3263 $$.logif = i;
3264 }
3265 ;
3266
3267 interface : /* empty */ { $$ = NULL; }
3268 | ON if_item_not { $$ = $2; }
3269 | ON '{' optnl if_list '}' { $$ = $4; }
3270 ;
3271
3272 if_list : if_item_not optnl { $$ = $1; }
3273 | if_list comma if_item_not optnl {
3274 $1->tail->next = $3;
3275 $1->tail = $3;
3276 $$ = $1;
3277 }
3278 ;
3279
3280 if_item_not : not if_item { $$ = $2; $$->not = $1; }
3281 ;
3282
3283 if_item : STRING {
3284 struct node_host *n;
3285
3286 $$ = calloc(1, sizeof(struct node_if));
3287 if ($$ == NULL)
3288 err(1, "if_item: calloc");
3289 if (strlcpy($$->ifname, $1, sizeof($$->ifname)) >=
3290 sizeof($$->ifname)) {
3291 free($1);
3292 free($$);
3293 yyerror("interface name too long");
3294 YYERROR;
3295 }
3296
3297 if ((n = ifa_exists($1)) != NULL)
3298 $$->ifa_flags = n->ifa_flags;
3299
3300 free($1);
3301 $$->not = 0;
3302 $$->next = NULL;
3303 $$->tail = $$;
3304 }
3305 | ANY {
3306 $$ = calloc(1, sizeof(struct node_if));
3307 if ($$ == NULL)
3308 err(1, "if_item: calloc");
3309 strlcpy($$->ifname, "any", sizeof($$->ifname));
3310 $$->not = 0;
3311 $$->next = NULL;
3312 $$->tail = $$;
3313 }
3314 ;
3315
3316 af : /* empty */ { $$ = 0; }
3317 | INET { $$ = AF_INET; }
3318 | INET6 { $$ = AF_INET6; }
3319 ;
3320
3321 etherproto : /* empty */ { $$ = NULL; }
3322 | PROTO etherproto_item { $$ = $2; }
3323 | PROTO '{' optnl etherproto_list '}' { $$ = $4; }
3324 ;
3325
3326 etherproto_list : etherproto_item optnl { $$ = $1; }
3327 | etherproto_list comma etherproto_item optnl {
3328 $1->tail->next = $3;
3329 $1->tail = $3;
3330 $$ = $1;
3331 }
3332 ;
3333
3334 etherproto_item : etherprotoval {
3335 u_int16_t pr;
3336
3337 pr = (u_int16_t)$1;
3338 if (pr == 0) {
3339 yyerror("proto 0 cannot be used");
3340 YYERROR;
3341 }
3342 $$ = calloc(1, sizeof(struct node_proto));
3343 if ($$ == NULL)
3344 err(1, "proto_item: calloc");
3345 $$->proto = pr;
3346 $$->next = NULL;
3347 $$->tail = $$;
3348 }
3349 ;
3350
3351 etherprotoval : NUMBER {
3352 if ($1 < 0 || $1 > 65565) {
3353 yyerror("protocol outside range");
3354 YYERROR;
3355 }
3356 }
3357 | STRING
3358 {
3359 if (!strncmp($1, "0x", 2)) {
3360 if (sscanf($1, "0x%4x", &$$) != 1) {
3361 free($1);
3362 yyerror("invalid EtherType hex");
3363 YYERROR;
3364 }
3365 } else {
3366 yyerror("Symbolic EtherType not yet supported");
3367 }
3368 }
3369 ;
3370
3371 proto : /* empty */ { $$ = NULL; }
3372 | PROTO proto_item { $$ = $2; }
3373 | PROTO '{' optnl proto_list '}' { $$ = $4; }
3374 ;
3375
3376 proto_list : proto_item optnl { $$ = $1; }
3377 | proto_list comma proto_item optnl {
3378 $1->tail->next = $3;
3379 $1->tail = $3;
3380 $$ = $1;
3381 }
3382 ;
3383
3384 proto_item : protoval {
3385 u_int8_t pr;
3386
3387 pr = (u_int8_t)$1;
3388 if (pr == 0) {
3389 yyerror("proto 0 cannot be used");
3390 YYERROR;
3391 }
3392 $$ = calloc(1, sizeof(struct node_proto));
3393 if ($$ == NULL)
3394 err(1, "proto_item: calloc");
3395 $$->proto = pr;
3396 $$->next = NULL;
3397 $$->tail = $$;
3398 }
3399 ;
3400
3401 protoval : STRING {
3402 struct protoent *p;
3403
3404 p = getprotobyname($1);
3405 if (p == NULL) {
3406 yyerror("unknown protocol %s", $1);
3407 free($1);
3408 YYERROR;
3409 }
3410 $$ = p->p_proto;
3411 free($1);
3412 }
3413 | NUMBER {
3414 if ($1 < 0 || $1 > 255) {
3415 yyerror("protocol outside range");
3416 YYERROR;
3417 }
3418 }
3419 ;
3420
3421 l3fromto : /* empty */ {
3422 bzero(&$$, sizeof($$));
3423 }
3424 | L3 fromto {
3425 if ($2.src.host != NULL &&
3426 $2.src.host->addr.type != PF_ADDR_ADDRMASK &&
3427 $2.src.host->addr.type != PF_ADDR_TABLE) {
3428 yyerror("from must be an address or table");
3429 YYERROR;
3430 }
3431 if ($2.dst.host != NULL &&
3432 $2.dst.host->addr.type != PF_ADDR_ADDRMASK &&
3433 $2.dst.host->addr.type != PF_ADDR_TABLE) {
3434 yyerror("to must be an address or table");
3435 YYERROR;
3436 }
3437 $$ = $2;
3438 }
3439 ;
3440 etherfromto : ALL {
3441 $$.src = NULL;
3442 $$.dst = NULL;
3443 }
3444 | etherfrom etherto {
3445 $$.src = $1.mac;
3446 $$.dst = $2.mac;
3447 }
3448 ;
3449
3450 etherfrom : /* emtpy */ {
3451 bzero(&$$, sizeof($$));
3452 }
3453 | FROM macspec {
3454 $$.mac = $2;
3455 }
3456 ;
3457
3458 etherto : /* empty */ {
3459 bzero(&$$, sizeof($$));
3460 }
3461 | TO macspec {
3462 $$.mac = $2;
3463 }
3464 ;
3465
3466 mac : string '/' NUMBER {
3467 $$ = node_mac_from_string_masklen($1, $3);
3468 free($1);
3469 if ($$ == NULL)
3470 YYERROR;
3471 }
3472 | string {
3473 if (strchr($1, '&')) {
3474 /* mac&mask */
3475 char *mac = strtok($1, "&");
3476 char *mask = strtok(NULL, "&");
3477 $$ = node_mac_from_string_mask(mac, mask);
3478 } else {
3479 $$ = node_mac_from_string($1);
3480 }
3481 free($1);
3482 if ($$ == NULL)
3483 YYERROR;
3484
3485 }
3486 xmac : not mac {
3487 struct node_mac *n;
3488
3489 for (n = $2; n != NULL; n = n->next)
3490 n->neg = $1;
3491 $$ = $2;
3492 }
3493 ;
3494 macspec : xmac {
3495 $$ = $1;
3496 }
3497 | '{' optnl mac_list '}'
3498 {
3499 $$ = $3;
3500 }
3501 ;
3502 mac_list : xmac optnl {
3503 $$ = $1;
3504 }
3505 | mac_list comma xmac {
3506 if ($3 == NULL)
3507 $$ = $1;
3508 else if ($1 == NULL)
3509 $$ = $3;
3510 else {
3511 $1->tail->next = $3;
3512 $1->tail = $3->tail;
3513 $$ = $1;
3514 }
3515 }
3516
3517 fromto : ALL {
3518 $$.src.host = NULL;
3519 $$.src.port = NULL;
3520 $$.dst.host = NULL;
3521 $$.dst.port = NULL;
3522 $$.src_os = NULL;
3523 }
3524 | from os to {
3525 $$.src = $1;
3526 $$.src_os = $2;
3527 $$.dst = $3;
3528 }
3529 ;
3530
3531 os : /* empty */ { $$ = NULL; }
3532 | OS xos { $$ = $2; }
3533 | OS '{' optnl os_list '}' { $$ = $4; }
3534 ;
3535
3536 xos : STRING {
3537 $$ = calloc(1, sizeof(struct node_os));
3538 if ($$ == NULL)
3539 err(1, "os: calloc");
3540 $$->os = $1;
3541 $$->tail = $$;
3542 }
3543 ;
3544
3545 os_list : xos optnl { $$ = $1; }
3546 | os_list comma xos optnl {
3547 $1->tail->next = $3;
3548 $1->tail = $3;
3549 $$ = $1;
3550 }
3551 ;
3552
3553 from : /* empty */ {
3554 $$.host = NULL;
3555 $$.port = NULL;
3556 }
3557 | FROM ipportspec {
3558 $$ = $2;
3559 }
3560 ;
3561
3562 to : /* empty */ {
3563 $$.host = NULL;
3564 $$.port = NULL;
3565 }
3566 | TO ipportspec {
3567 if (disallow_urpf_failed($2.host, "\"urpf-failed\" is "
3568 "not permitted in a destination address"))
3569 YYERROR;
3570 $$ = $2;
3571 }
3572 ;
3573
3574 ipportspec : ipspec {
3575 $$.host = $1;
3576 $$.port = NULL;
3577 }
3578 | ipspec PORT portspec {
3579 $$.host = $1;
3580 $$.port = $3;
3581 }
3582 | PORT portspec {
3583 $$.host = NULL;
3584 $$.port = $2;
3585 }
3586 ;
3587
3588 optnl : '\n' optnl
3589 |
3590 ;
3591
3592 ipspec : ANY { $$ = NULL; }
3593 | xhost { $$ = $1; }
3594 | '{' optnl host_list '}' { $$ = $3; }
3595 ;
3596
3597 toipspec : TO ipspec { $$ = $2; }
3598 | /* empty */ { $$ = NULL; }
3599 ;
3600
3601 host_list : ipspec optnl { $$ = $1; }
3602 | host_list comma ipspec optnl {
3603 if ($1 == NULL) {
3604 freehostlist($3);
3605 $$ = $1;
3606 } else if ($3 == NULL) {
3607 freehostlist($1);
3608 $$ = $3;
3609 } else {
3610 $1->tail->next = $3;
3611 $1->tail = $3->tail;
3612 $$ = $1;
3613 }
3614 }
3615 ;
3616
3617 xhost : not host {
3618 struct node_host *n;
3619
3620 for (n = $2; n != NULL; n = n->next)
3621 n->not = $1;
3622 $$ = $2;
3623 }
3624 | not NOROUTE {
3625 $$ = calloc(1, sizeof(struct node_host));
3626 if ($$ == NULL)
3627 err(1, "xhost: calloc");
3628 $$->addr.type = PF_ADDR_NOROUTE;
3629 $$->next = NULL;
3630 $$->not = $1;
3631 $$->tail = $$;
3632 }
3633 | not URPFFAILED {
3634 $$ = calloc(1, sizeof(struct node_host));
3635 if ($$ == NULL)
3636 err(1, "xhost: calloc");
3637 $$->addr.type = PF_ADDR_URPFFAILED;
3638 $$->next = NULL;
3639 $$->not = $1;
3640 $$->tail = $$;
3641 }
3642 ;
3643
3644 host : STRING {
3645 if (($$ = host($1, pf->opts)) == NULL) {
3646 /* error. "any" is handled elsewhere */
3647 free($1);
3648 yyerror("could not parse host specification");
3649 YYERROR;
3650 }
3651 free($1);
3652
3653 }
3654 | STRING '-' STRING {
3655 struct node_host *b, *e;
3656
3657 if ((b = host($1, pf->opts)) == NULL ||
3658 (e = host($3, pf->opts)) == NULL) {
3659 free($1);
3660 free($3);
3661 yyerror("could not parse host specification");
3662 YYERROR;
3663 }
3664 if (b->af != e->af ||
3665 b->addr.type != PF_ADDR_ADDRMASK ||
3666 e->addr.type != PF_ADDR_ADDRMASK ||
3667 unmask(&b->addr.v.a.mask) !=
3668 (b->af == AF_INET ? 32 : 128) ||
3669 unmask(&e->addr.v.a.mask) !=
3670 (e->af == AF_INET ? 32 : 128) ||
3671 b->next != NULL || b->not ||
3672 e->next != NULL || e->not) {
3673 free(b);
3674 free(e);
3675 free($1);
3676 free($3);
3677 yyerror("invalid address range");
3678 YYERROR;
3679 }
3680 memcpy(&b->addr.v.a.mask, &e->addr.v.a.addr,
3681 sizeof(b->addr.v.a.mask));
3682 b->addr.type = PF_ADDR_RANGE;
3683 $$ = b;
3684 free(e);
3685 free($1);
3686 free($3);
3687 }
3688 | STRING '/' NUMBER {
3689 char *buf;
3690
3691 if (asprintf(&buf, "%s/%lld", $1, (long long)$3) == -1)
3692 err(1, "host: asprintf");
3693 free($1);
3694 if (($$ = host(buf, pf->opts)) == NULL) {
3695 /* error. "any" is handled elsewhere */
3696 free(buf);
3697 yyerror("could not parse host specification");
3698 YYERROR;
3699 }
3700 free(buf);
3701 }
3702 | NUMBER '/' NUMBER {
3703 char *buf;
3704
3705 /* ie. for 10/8 parsing */
3706 #ifdef __FreeBSD__
3707 if (asprintf(&buf, "%lld/%lld", (long long)$1, (long long)$3) == -1)
3708 #else
3709 if (asprintf(&buf, "%lld/%lld", $1, $3) == -1)
3710 #endif
3711 err(1, "host: asprintf");
3712 if (($$ = host(buf, pf->opts)) == NULL) {
3713 /* error. "any" is handled elsewhere */
3714 free(buf);
3715 yyerror("could not parse host specification");
3716 YYERROR;
3717 }
3718 free(buf);
3719 }
3720 | dynaddr
3721 | dynaddr '/' NUMBER {
3722 struct node_host *n;
3723
3724 if ($3 < 0 || $3 > 128) {
3725 yyerror("bit number too big");
3726 YYERROR;
3727 }
3728 $$ = $1;
3729 for (n = $1; n != NULL; n = n->next)
3730 set_ipmask(n, $3);
3731 }
3732 | '<' STRING '>' {
3733 if (strlen($2) >= PF_TABLE_NAME_SIZE) {
3734 yyerror("table name '%s' too long", $2);
3735 free($2);
3736 YYERROR;
3737 }
3738 $$ = calloc(1, sizeof(struct node_host));
3739 if ($$ == NULL)
3740 err(1, "host: calloc");
3741 $$->addr.type = PF_ADDR_TABLE;
3742 if (strlcpy($$->addr.v.tblname, $2,
3743 sizeof($$->addr.v.tblname)) >=
3744 sizeof($$->addr.v.tblname))
3745 errx(1, "host: strlcpy");
3746 free($2);
3747 $$->next = NULL;
3748 $$->tail = $$;
3749 }
3750 ;
3751
3752 number : NUMBER
3753 | STRING {
3754 u_long ulval;
3755
3756 if (atoul($1, &ulval) == -1) {
3757 yyerror("%s is not a number", $1);
3758 free($1);
3759 YYERROR;
3760 } else
3761 $$ = ulval;
3762 free($1);
3763 }
3764 ;
3765
3766 dynaddr : '(' STRING ')' {
3767 int flags = 0;
3768 char *p, *op;
3769
3770 op = $2;
3771 if (!isalpha(op[0])) {
3772 yyerror("invalid interface name '%s'", op);
3773 free(op);
3774 YYERROR;
3775 }
3776 while ((p = strrchr($2, ':')) != NULL) {
3777 if (!strcmp(p+1, "network"))
3778 flags |= PFI_AFLAG_NETWORK;
3779 else if (!strcmp(p+1, "broadcast"))
3780 flags |= PFI_AFLAG_BROADCAST;
3781 else if (!strcmp(p+1, "peer"))
3782 flags |= PFI_AFLAG_PEER;
3783 else if (!strcmp(p+1, "0"))
3784 flags |= PFI_AFLAG_NOALIAS;
3785 else {
3786 yyerror("interface %s has bad modifier",
3787 $2);
3788 free(op);
3789 YYERROR;
3790 }
3791 *p = '\0';
3792 }
3793 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) {
3794 free(op);
3795 yyerror("illegal combination of "
3796 "interface modifiers");
3797 YYERROR;
3798 }
3799 $$ = calloc(1, sizeof(struct node_host));
3800 if ($$ == NULL)
3801 err(1, "address: calloc");
3802 $$->af = 0;
3803 set_ipmask($$, 128);
3804 $$->addr.type = PF_ADDR_DYNIFTL;
3805 $$->addr.iflags = flags;
3806 if (strlcpy($$->addr.v.ifname, $2,
3807 sizeof($$->addr.v.ifname)) >=
3808 sizeof($$->addr.v.ifname)) {
3809 free(op);
3810 free($$);
3811 yyerror("interface name too long");
3812 YYERROR;
3813 }
3814 free(op);
3815 $$->next = NULL;
3816 $$->tail = $$;
3817 }
3818 ;
3819
3820 portspec : port_item { $$ = $1; }
3821 | '{' optnl port_list '}' { $$ = $3; }
3822 ;
3823
3824 port_list : port_item optnl { $$ = $1; }
3825 | port_list comma port_item optnl {
3826 $1->tail->next = $3;
3827 $1->tail = $3;
3828 $$ = $1;
3829 }
3830 ;
3831
3832 port_item : portrange {
3833 $$ = calloc(1, sizeof(struct node_port));
3834 if ($$ == NULL)
3835 err(1, "port_item: calloc");
3836 $$->port[0] = $1.a;
3837 $$->port[1] = $1.b;
3838 if ($1.t) {
3839 $$->op = PF_OP_RRG;
3840 if (validate_range($$->op, $$->port[0],
3841 $$->port[1])) {
3842 yyerror("invalid port range");
3843 YYERROR;
3844 }
3845 } else
3846 $$->op = PF_OP_EQ;
3847 $$->next = NULL;
3848 $$->tail = $$;
3849 }
3850 | unaryop portrange {
3851 if ($2.t) {
3852 yyerror("':' cannot be used with an other "
3853 "port operator");
3854 YYERROR;
3855 }
3856 $$ = calloc(1, sizeof(struct node_port));
3857 if ($$ == NULL)
3858 err(1, "port_item: calloc");
3859 $$->port[0] = $2.a;
3860 $$->port[1] = $2.b;
3861 $$->op = $1;
3862 if (validate_range($$->op, $$->port[0], $$->port[1])) {
3863 yyerror("invalid port range");
3864 YYERROR;
3865 }
3866 $$->next = NULL;
3867 $$->tail = $$;
3868 }
3869 | portrange PORTBINARY portrange {
3870 if ($1.t || $3.t) {
3871 yyerror("':' cannot be used with an other "
3872 "port operator");
3873 YYERROR;
3874 }
3875 $$ = calloc(1, sizeof(struct node_port));
3876 if ($$ == NULL)
3877 err(1, "port_item: calloc");
3878 $$->port[0] = $1.a;
3879 $$->port[1] = $3.a;
3880 $$->op = $2;
3881 if (validate_range($$->op, $$->port[0], $$->port[1])) {
3882 yyerror("invalid port range");
3883 YYERROR;
3884 }
3885 $$->next = NULL;
3886 $$->tail = $$;
3887 }
3888 ;
3889
3890 portplain : numberstring {
3891 if (parseport($1, &$$, 0) == -1) {
3892 free($1);
3893 YYERROR;
3894 }
3895 free($1);
3896 }
3897 ;
3898
3899 portrange : numberstring {
3900 if (parseport($1, &$$, PPORT_RANGE) == -1) {
3901 free($1);
3902 YYERROR;
3903 }
3904 free($1);
3905 }
3906 ;
3907
3908 uids : uid_item { $$ = $1; }
3909 | '{' optnl uid_list '}' { $$ = $3; }
3910 ;
3911
3912 uid_list : uid_item optnl { $$ = $1; }
3913 | uid_list comma uid_item optnl {
3914 $1->tail->next = $3;
3915 $1->tail = $3;
3916 $$ = $1;
3917 }
3918 ;
3919
3920 uid_item : uid {
3921 $$ = calloc(1, sizeof(struct node_uid));
3922 if ($$ == NULL)
3923 err(1, "uid_item: calloc");
3924 $$->uid[0] = $1;
3925 $$->uid[1] = $1;
3926 $$->op = PF_OP_EQ;
3927 $$->next = NULL;
3928 $$->tail = $$;
3929 }
3930 | unaryop uid {
3931 if ($2 == -1 && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
3932 yyerror("user unknown requires operator = or "
3933 "!=");
3934 YYERROR;
3935 }
3936 $$ = calloc(1, sizeof(struct node_uid));
3937 if ($$ == NULL)
3938 err(1, "uid_item: calloc");
3939 $$->uid[0] = $2;
3940 $$->uid[1] = $2;
3941 $$->op = $1;
3942 $$->next = NULL;
3943 $$->tail = $$;
3944 }
3945 | uid PORTBINARY uid {
3946 if ($1 == -1 || $3 == -1) {
3947 yyerror("user unknown requires operator = or "
3948 "!=");
3949 YYERROR;
3950 }
3951 $$ = calloc(1, sizeof(struct node_uid));
3952 if ($$ == NULL)
3953 err(1, "uid_item: calloc");
3954 $$->uid[0] = $1;
3955 $$->uid[1] = $3;
3956 $$->op = $2;
3957 $$->next = NULL;
3958 $$->tail = $$;
3959 }
3960 ;
3961
3962 uid : STRING {
3963 if (!strcmp($1, "unknown"))
3964 $$ = -1;
3965 else {
3966 uid_t uid;
3967
3968 if (uid_from_user($1, &uid) == -1) {
3969 yyerror("unknown user %s", $1);
3970 free($1);
3971 YYERROR;
3972 }
3973 $$ = uid;
3974 }
3975 free($1);
3976 }
3977 | NUMBER {
3978 if ($1 < 0 || $1 >= UID_MAX) {
3979 yyerror("illegal uid value %lu", $1);
3980 YYERROR;
3981 }
3982 $$ = $1;
3983 }
3984 ;
3985
3986 gids : gid_item { $$ = $1; }
3987 | '{' optnl gid_list '}' { $$ = $3; }
3988 ;
3989
3990 gid_list : gid_item optnl { $$ = $1; }
3991 | gid_list comma gid_item optnl {
3992 $1->tail->next = $3;
3993 $1->tail = $3;
3994 $$ = $1;
3995 }
3996 ;
3997
3998 gid_item : gid {
3999 $$ = calloc(1, sizeof(struct node_gid));
4000 if ($$ == NULL)
4001 err(1, "gid_item: calloc");
4002 $$->gid[0] = $1;
4003 $$->gid[1] = $1;
4004 $$->op = PF_OP_EQ;
4005 $$->next = NULL;
4006 $$->tail = $$;
4007 }
4008 | unaryop gid {
4009 if ($2 == -1 && $1 != PF_OP_EQ && $1 != PF_OP_NE) {
4010 yyerror("group unknown requires operator = or "
4011 "!=");
4012 YYERROR;
4013 }
4014 $$ = calloc(1, sizeof(struct node_gid));
4015 if ($$ == NULL)
4016 err(1, "gid_item: calloc");
4017 $$->gid[0] = $2;
4018 $$->gid[1] = $2;
4019 $$->op = $1;
4020 $$->next = NULL;
4021 $$->tail = $$;
4022 }
4023 | gid PORTBINARY gid {
4024 if ($1 == -1 || $3 == -1) {
4025 yyerror("group unknown requires operator = or "
4026 "!=");
4027 YYERROR;
4028 }
4029 $$ = calloc(1, sizeof(struct node_gid));
4030 if ($$ == NULL)
4031 err(1, "gid_item: calloc");
4032 $$->gid[0] = $1;
4033 $$->gid[1] = $3;
4034 $$->op = $2;
4035 $$->next = NULL;
4036 $$->tail = $$;
4037 }
4038 ;
4039
4040 gid : STRING {
4041 if (!strcmp($1, "unknown"))
4042 $$ = -1;
4043 else {
4044 gid_t gid;
4045
4046 if (gid_from_group($1, &gid) == -1) {
4047 yyerror("unknown group %s", $1);
4048 free($1);
4049 YYERROR;
4050 }
4051 $$ = gid;
4052 }
4053 free($1);
4054 }
4055 | NUMBER {
4056 if ($1 < 0 || $1 >= GID_MAX) {
4057 yyerror("illegal gid value %lu", $1);
4058 YYERROR;
4059 }
4060 $$ = $1;
4061 }
4062 ;
4063
4064 flag : STRING {
4065 int f;
4066
4067 if ((f = parse_flags($1)) < 0) {
4068 yyerror("bad flags %s", $1);
4069 free($1);
4070 YYERROR;
4071 }
4072 free($1);
4073 $$.b1 = f;
4074 }
4075 ;
4076
4077 flags : FLAGS flag '/' flag { $$.b1 = $2.b1; $$.b2 = $4.b1; }
4078 | FLAGS '/' flag { $$.b1 = 0; $$.b2 = $3.b1; }
4079 | FLAGS ANY { $$.b1 = 0; $$.b2 = 0; }
4080 ;
4081
4082 icmpspec : ICMPTYPE icmp_item { $$ = $2; }
4083 | ICMPTYPE '{' optnl icmp_list '}' { $$ = $4; }
4084 | ICMP6TYPE icmp6_item { $$ = $2; }
4085 | ICMP6TYPE '{' optnl icmp6_list '}' { $$ = $4; }
4086 ;
4087
4088 icmp_list : icmp_item optnl { $$ = $1; }
4089 | icmp_list comma icmp_item optnl {
4090 $1->tail->next = $3;
4091 $1->tail = $3;
4092 $$ = $1;
4093 }
4094 ;
4095
4096 icmp6_list : icmp6_item optnl { $$ = $1; }
4097 | icmp6_list comma icmp6_item optnl {
4098 $1->tail->next = $3;
4099 $1->tail = $3;
4100 $$ = $1;
4101 }
4102 ;
4103
4104 icmp_item : icmptype {
4105 $$ = calloc(1, sizeof(struct node_icmp));
4106 if ($$ == NULL)
4107 err(1, "icmp_item: calloc");
4108 $$->type = $1;
4109 $$->code = 0;
4110 $$->proto = IPPROTO_ICMP;
4111 $$->next = NULL;
4112 $$->tail = $$;
4113 }
4114 | icmptype CODE STRING {
4115 const struct icmpcodeent *p;
4116
4117 if ((p = geticmpcodebyname($1-1, $3, AF_INET)) == NULL) {
4118 yyerror("unknown icmp-code %s", $3);
4119 free($3);
4120 YYERROR;
4121 }
4122
4123 free($3);
4124 $$ = calloc(1, sizeof(struct node_icmp));
4125 if ($$ == NULL)
4126 err(1, "icmp_item: calloc");
4127 $$->type = $1;
4128 $$->code = p->code + 1;
4129 $$->proto = IPPROTO_ICMP;
4130 $$->next = NULL;
4131 $$->tail = $$;
4132 }
4133 | icmptype CODE NUMBER {
4134 if ($3 < 0 || $3 > 255) {
4135 yyerror("illegal icmp-code %lu", $3);
4136 YYERROR;
4137 }
4138 $$ = calloc(1, sizeof(struct node_icmp));
4139 if ($$ == NULL)
4140 err(1, "icmp_item: calloc");
4141 $$->type = $1;
4142 $$->code = $3 + 1;
4143 $$->proto = IPPROTO_ICMP;
4144 $$->next = NULL;
4145 $$->tail = $$;
4146 }
4147 ;
4148
4149 icmp6_item : icmp6type {
4150 $$ = calloc(1, sizeof(struct node_icmp));
4151 if ($$ == NULL)
4152 err(1, "icmp_item: calloc");
4153 $$->type = $1;
4154 $$->code = 0;
4155 $$->proto = IPPROTO_ICMPV6;
4156 $$->next = NULL;
4157 $$->tail = $$;
4158 }
4159 | icmp6type CODE STRING {
4160 const struct icmpcodeent *p;
4161
4162 if ((p = geticmpcodebyname($1-1, $3, AF_INET6)) == NULL) {
4163 yyerror("unknown icmp6-code %s", $3);
4164 free($3);
4165 YYERROR;
4166 }
4167 free($3);
4168
4169 $$ = calloc(1, sizeof(struct node_icmp));
4170 if ($$ == NULL)
4171 err(1, "icmp_item: calloc");
4172 $$->type = $1;
4173 $$->code = p->code + 1;
4174 $$->proto = IPPROTO_ICMPV6;
4175 $$->next = NULL;
4176 $$->tail = $$;
4177 }
4178 | icmp6type CODE NUMBER {
4179 if ($3 < 0 || $3 > 255) {
4180 yyerror("illegal icmp-code %lu", $3);
4181 YYERROR;
4182 }
4183 $$ = calloc(1, sizeof(struct node_icmp));
4184 if ($$ == NULL)
4185 err(1, "icmp_item: calloc");
4186 $$->type = $1;
4187 $$->code = $3 + 1;
4188 $$->proto = IPPROTO_ICMPV6;
4189 $$->next = NULL;
4190 $$->tail = $$;
4191 }
4192 ;
4193
4194 icmptype : STRING {
4195 const struct icmptypeent *p;
4196
4197 if ((p = geticmptypebyname($1, AF_INET)) == NULL) {
4198 yyerror("unknown icmp-type %s", $1);
4199 free($1);
4200 YYERROR;
4201 }
4202 $$ = p->type + 1;
4203 free($1);
4204 }
4205 | NUMBER {
4206 if ($1 < 0 || $1 > 255) {
4207 yyerror("illegal icmp-type %lu", $1);
4208 YYERROR;
4209 }
4210 $$ = $1 + 1;
4211 }
4212 ;
4213
4214 icmp6type : STRING {
4215 const struct icmptypeent *p;
4216
4217 if ((p = geticmptypebyname($1, AF_INET6)) ==
4218 NULL) {
4219 yyerror("unknown icmp6-type %s", $1);
4220 free($1);
4221 YYERROR;
4222 }
4223 $$ = p->type + 1;
4224 free($1);
4225 }
4226 | NUMBER {
4227 if ($1 < 0 || $1 > 255) {
4228 yyerror("illegal icmp6-type %lu", $1);
4229 YYERROR;
4230 }
4231 $$ = $1 + 1;
4232 }
4233 ;
4234
4235 tos : STRING {
4236 int val;
4237 char *end;
4238
4239 if (map_tos($1, &val))
4240 $$ = val;
4241 else if ($1[0] == '0' && $1[1] == 'x') {
4242 errno = 0;
4243 $$ = strtoul($1, &end, 16);
4244 if (errno || *end != '\0')
4245 $$ = 256;
4246 } else
4247 $$ = 256; /* flag bad argument */
4248 if ($$ < 0 || $$ > 255) {
4249 yyerror("illegal tos value %s", $1);
4250 free($1);
4251 YYERROR;
4252 }
4253 free($1);
4254 }
4255 | NUMBER {
4256 $$ = $1;
4257 if ($$ < 0 || $$ > 255) {
4258 yyerror("illegal tos value %lu", $1);
4259 YYERROR;
4260 }
4261 }
4262 ;
4263
4264 sourcetrack : SOURCETRACK { $$ = PF_SRCTRACK; }
4265 | SOURCETRACK GLOBAL { $$ = PF_SRCTRACK_GLOBAL; }
4266 | SOURCETRACK RULE { $$ = PF_SRCTRACK_RULE; }
4267 ;
4268
4269 statelock : IFBOUND {
4270 $$ = PFRULE_IFBOUND;
4271 }
4272 | FLOATING {
4273 $$ = 0;
4274 }
4275 ;
4276
4277 keep : NO STATE {
4278 $$.action = 0;
4279 $$.options = NULL;
4280 }
4281 | KEEP STATE state_opt_spec {
4282 $$.action = PF_STATE_NORMAL;
4283 $$.options = $3;
4284 }
4285 | MODULATE STATE state_opt_spec {
4286 $$.action = PF_STATE_MODULATE;
4287 $$.options = $3;
4288 }
4289 | SYNPROXY STATE state_opt_spec {
4290 $$.action = PF_STATE_SYNPROXY;
4291 $$.options = $3;
4292 }
4293 ;
4294
4295 flush : /* empty */ { $$ = 0; }
4296 | FLUSH { $$ = PF_FLUSH; }
4297 | FLUSH GLOBAL {
4298 $$ = PF_FLUSH | PF_FLUSH_GLOBAL;
4299 }
4300 ;
4301
4302 state_opt_spec : '(' state_opt_list ')' { $$ = $2; }
4303 | /* empty */ { $$ = NULL; }
4304 ;
4305
4306 state_opt_list : state_opt_item { $$ = $1; }
4307 | state_opt_list comma state_opt_item {
4308 $1->tail->next = $3;
4309 $1->tail = $3;
4310 $$ = $1;
4311 }
4312 ;
4313
4314 state_opt_item : MAXIMUM NUMBER {
4315 if ($2 < 0 || $2 > UINT_MAX) {
4316 yyerror("only positive values permitted");
4317 YYERROR;
4318 }
4319 $$ = calloc(1, sizeof(struct node_state_opt));
4320 if ($$ == NULL)
4321 err(1, "state_opt_item: calloc");
4322 $$->type = PF_STATE_OPT_MAX;
4323 $$->data.max_states = $2;
4324 $$->next = NULL;
4325 $$->tail = $$;
4326 }
4327 | NOSYNC {
4328 $$ = calloc(1, sizeof(struct node_state_opt));
4329 if ($$ == NULL)
4330 err(1, "state_opt_item: calloc");
4331 $$->type = PF_STATE_OPT_NOSYNC;
4332 $$->next = NULL;
4333 $$->tail = $$;
4334 }
4335 | MAXSRCSTATES NUMBER {
4336 if ($2 < 0 || $2 > UINT_MAX) {
4337 yyerror("only positive values permitted");
4338 YYERROR;
4339 }
4340 $$ = calloc(1, sizeof(struct node_state_opt));
4341 if ($$ == NULL)
4342 err(1, "state_opt_item: calloc");
4343 $$->type = PF_STATE_OPT_MAX_SRC_STATES;
4344 $$->data.max_src_states = $2;
4345 $$->next = NULL;
4346 $$->tail = $$;
4347 }
4348 | MAXSRCCONN NUMBER {
4349 if ($2 < 0 || $2 > UINT_MAX) {
4350 yyerror("only positive values permitted");
4351 YYERROR;
4352 }
4353 $$ = calloc(1, sizeof(struct node_state_opt));
4354 if ($$ == NULL)
4355 err(1, "state_opt_item: calloc");
4356 $$->type = PF_STATE_OPT_MAX_SRC_CONN;
4357 $$->data.max_src_conn = $2;
4358 $$->next = NULL;
4359 $$->tail = $$;
4360 }
4361 | MAXSRCCONNRATE NUMBER '/' NUMBER {
4362 if ($2 < 0 || $2 > UINT_MAX ||
4363 $4 < 0 || $4 > UINT_MAX) {
4364 yyerror("only positive values permitted");
4365 YYERROR;
4366 }
4367 $$ = calloc(1, sizeof(struct node_state_opt));
4368 if ($$ == NULL)
4369 err(1, "state_opt_item: calloc");
4370 $$->type = PF_STATE_OPT_MAX_SRC_CONN_RATE;
4371 $$->data.max_src_conn_rate.limit = $2;
4372 $$->data.max_src_conn_rate.seconds = $4;
4373 $$->next = NULL;
4374 $$->tail = $$;
4375 }
4376 | OVERLOAD '<' STRING '>' flush {
4377 if (strlen($3) >= PF_TABLE_NAME_SIZE) {
4378 yyerror("table name '%s' too long", $3);
4379 free($3);
4380 YYERROR;
4381 }
4382 $$ = calloc(1, sizeof(struct node_state_opt));
4383 if ($$ == NULL)
4384 err(1, "state_opt_item: calloc");
4385 if (strlcpy($$->data.overload.tblname, $3,
4386 PF_TABLE_NAME_SIZE) >= PF_TABLE_NAME_SIZE)
4387 errx(1, "state_opt_item: strlcpy");
4388 free($3);
4389 $$->type = PF_STATE_OPT_OVERLOAD;
4390 $$->data.overload.flush = $5;
4391 $$->next = NULL;
4392 $$->tail = $$;
4393 }
4394 | MAXSRCNODES NUMBER {
4395 if ($2 < 0 || $2 > UINT_MAX) {
4396 yyerror("only positive values permitted");
4397 YYERROR;
4398 }
4399 $$ = calloc(1, sizeof(struct node_state_opt));
4400 if ($$ == NULL)
4401 err(1, "state_opt_item: calloc");
4402 $$->type = PF_STATE_OPT_MAX_SRC_NODES;
4403 $$->data.max_src_nodes = $2;
4404 $$->next = NULL;
4405 $$->tail = $$;
4406 }
4407 | sourcetrack {
4408 $$ = calloc(1, sizeof(struct node_state_opt));
4409 if ($$ == NULL)
4410 err(1, "state_opt_item: calloc");
4411 $$->type = PF_STATE_OPT_SRCTRACK;
4412 $$->data.src_track = $1;
4413 $$->next = NULL;
4414 $$->tail = $$;
4415 }
4416 | statelock {
4417 $$ = calloc(1, sizeof(struct node_state_opt));
4418 if ($$ == NULL)
4419 err(1, "state_opt_item: calloc");
4420 $$->type = PF_STATE_OPT_STATELOCK;
4421 $$->data.statelock = $1;
4422 $$->next = NULL;
4423 $$->tail = $$;
4424 }
4425 | SLOPPY {
4426 $$ = calloc(1, sizeof(struct node_state_opt));
4427 if ($$ == NULL)
4428 err(1, "state_opt_item: calloc");
4429 $$->type = PF_STATE_OPT_SLOPPY;
4430 $$->next = NULL;
4431 $$->tail = $$;
4432 }
4433 | PFLOW {
4434 $$ = calloc(1, sizeof(struct node_state_opt));
4435 if ($$ == NULL)
4436 err(1, "state_opt_item: calloc");
4437 $$->type = PF_STATE_OPT_PFLOW;
4438 $$->next = NULL;
4439 $$->tail = $$;
4440 }
4441 | ALLOW_RELATED {
4442 $$ = calloc(1, sizeof(struct node_state_opt));
4443 if ($$ == NULL)
4444 err(1, "state_opt_item: calloc");
4445 $$->type = PF_STATE_OPT_ALLOW_RELATED;
4446 $$->next = NULL;
4447 $$->tail = $$;
4448 }
4449 | STRING NUMBER {
4450 int i;
4451
4452 if ($2 < 0 || $2 > UINT_MAX) {
4453 yyerror("only positive values permitted");
4454 YYERROR;
4455 }
4456 for (i = 0; pf_timeouts[i].name &&
4457 strcmp(pf_timeouts[i].name, $1); ++i)
4458 ; /* nothing */
4459 if (!pf_timeouts[i].name) {
4460 yyerror("illegal timeout name %s", $1);
4461 free($1);
4462 YYERROR;
4463 }
4464 if (strchr(pf_timeouts[i].name, '.') == NULL) {
4465 yyerror("illegal state timeout %s", $1);
4466 free($1);
4467 YYERROR;
4468 }
4469 free($1);
4470 $$ = calloc(1, sizeof(struct node_state_opt));
4471 if ($$ == NULL)
4472 err(1, "state_opt_item: calloc");
4473 $$->type = PF_STATE_OPT_TIMEOUT;
4474 $$->data.timeout.number = pf_timeouts[i].timeout;
4475 $$->data.timeout.seconds = $2;
4476 $$->next = NULL;
4477 $$->tail = $$;
4478 }
4479 ;
4480
4481 label : LABEL STRING {
4482 $$ = $2;
4483 }
4484 ;
4485
4486 etherqname : QUEUE STRING {
4487 $$.qname = $2;
4488 }
4489 | QUEUE '(' STRING ')' {
4490 $$.qname = $3;
4491 }
4492 ;
4493
4494 qname : QUEUE STRING {
4495 $$.qname = $2;
4496 $$.pqname = NULL;
4497 }
4498 | QUEUE '(' STRING ')' {
4499 $$.qname = $3;
4500 $$.pqname = NULL;
4501 }
4502 | QUEUE '(' STRING comma STRING ')' {
4503 $$.qname = $3;
4504 $$.pqname = $5;
4505 }
4506 ;
4507
4508 no : /* empty */ { $$ = 0; }
4509 | NO { $$ = 1; }
4510 ;
4511
4512 portstar : numberstring {
4513 if (parseport($1, &$$, PPORT_RANGE|PPORT_STAR) == -1) {
4514 free($1);
4515 YYERROR;
4516 }
4517 free($1);
4518 }
4519 ;
4520
4521 redir_host : host { $$ = $1; }
4522 | '{' optnl redir_host_list '}' { $$ = $3; }
4523 ;
4524
4525 redir_host_list : host optnl { $$ = $1; }
4526 | redir_host_list comma host optnl {
4527 $1->tail->next = $3;
4528 $1->tail = $3->tail;
4529 $$ = $1;
4530 }
4531 ;
4532
4533 /* Redirection without port */
4534 no_port_redirspec: redir_host pool_opts {
4535 $$ = calloc(1, sizeof(struct redirspec));
4536 if ($$ == NULL)
4537 err(1, "redirspec: calloc");
4538 $$->host = $1;
4539 $$->pool_opts = $2;
4540 $$->rport.a = $$->rport.b = $$->rport.t = 0;
4541 }
4542 ;
4543
4544 /* Redirection with optional port */
4545 port_redirspec : no_port_redirspec;
4546 | redir_host PORT portstar pool_opts {
4547 $$ = calloc(1, sizeof(struct redirspec));
4548 if ($$ == NULL)
4549 err(1, "redirspec: calloc");
4550 $$->host = $1;
4551 $$->rport = $3;
4552 $$->pool_opts = $4;
4553 }
4554
4555 /* Redirection with an arrow and an optional port: FreeBSD NAT rules */
4556 nat_redirspec : /* empty */ { $$ = NULL; }
4557 | ARROW port_redirspec {
4558 $$ = $2;
4559 }
4560 ;
4561
4562 /* Redirection with interfaces and without ports: route-to rules */
4563 route_redirspec : routespec pool_opts {
4564 $$ = calloc(1, sizeof(struct redirspec));
4565 if ($$ == NULL)
4566 err(1, "redirspec: calloc");
4567 $$->host = $1;
4568 $$->pool_opts = $2;
4569 }
4570 ;
4571
4572 hashkey : /* empty */
4573 {
4574 $$ = calloc(1, sizeof(struct pf_poolhashkey));
4575 if ($$ == NULL)
4576 err(1, "hashkey: calloc");
4577 $$->key32[0] = arc4random();
4578 $$->key32[1] = arc4random();
4579 $$->key32[2] = arc4random();
4580 $$->key32[3] = arc4random();
4581 }
4582 | string
4583 {
4584 if (!strncmp($1, "0x", 2)) {
4585 if (strlen($1) != 34) {
4586 free($1);
4587 yyerror("hex key must be 128 bits "
4588 "(32 hex digits) long");
4589 YYERROR;
4590 }
4591 $$ = calloc(1, sizeof(struct pf_poolhashkey));
4592 if ($$ == NULL)
4593 err(1, "hashkey: calloc");
4594
4595 if (sscanf($1, "0x%8x%8x%8x%8x",
4596 &$$->key32[0], &$$->key32[1],
4597 &$$->key32[2], &$$->key32[3]) != 4) {
4598 free($$);
4599 free($1);
4600 yyerror("invalid hex key");
4601 YYERROR;
4602 }
4603 } else {
4604 MD5_CTX context;
4605
4606 $$ = calloc(1, sizeof(struct pf_poolhashkey));
4607 if ($$ == NULL)
4608 err(1, "hashkey: calloc");
4609 MD5Init(&context);
4610 MD5Update(&context, (unsigned char *)$1,
4611 strlen($1));
4612 MD5Final((unsigned char *)$$, &context);
4613 HTONL($$->key32[0]);
4614 HTONL($$->key32[1]);
4615 HTONL($$->key32[2]);
4616 HTONL($$->key32[3]);
4617 }
4618 free($1);
4619 }
4620 ;
4621
4622 pool_opts : { bzero(&pool_opts, sizeof pool_opts); }
4623 pool_opts_l
4624 { $$ = pool_opts; }
4625 | /* empty */ {
4626 bzero(&pool_opts, sizeof pool_opts);
4627 $$ = pool_opts;
4628 }
4629 ;
4630
4631 pool_opts_l : pool_opts_l pool_opt
4632 | pool_opt
4633 ;
4634
4635 pool_opt : BITMASK {
4636 if (pool_opts.type) {
4637 yyerror("pool type cannot be redefined");
4638 YYERROR;
4639 }
4640 pool_opts.type = PF_POOL_BITMASK;
4641 }
4642 | RANDOM {
4643 if (pool_opts.type) {
4644 yyerror("pool type cannot be redefined");
4645 YYERROR;
4646 }
4647 pool_opts.type = PF_POOL_RANDOM;
4648 }
4649 | SOURCEHASH hashkey {
4650 if (pool_opts.type) {
4651 yyerror("pool type cannot be redefined");
4652 YYERROR;
4653 }
4654 pool_opts.type = PF_POOL_SRCHASH;
4655 pool_opts.key = $2;
4656 }
4657 | ROUNDROBIN {
4658 if (pool_opts.type) {
4659 yyerror("pool type cannot be redefined");
4660 YYERROR;
4661 }
4662 pool_opts.type = PF_POOL_ROUNDROBIN;
4663 }
4664 | STATICPORT {
4665 if (pool_opts.staticport) {
4666 yyerror("static-port cannot be redefined");
4667 YYERROR;
4668 }
4669 pool_opts.staticport = 1;
4670 }
4671 | STICKYADDRESS {
4672 if (pool_opts.marker & POM_STICKYADDRESS) {
4673 yyerror("sticky-address cannot be redefined");
4674 YYERROR;
4675 }
4676 pool_opts.marker |= POM_STICKYADDRESS;
4677 pool_opts.opts |= PF_POOL_STICKYADDR;
4678 }
4679 | ENDPI {
4680 if (pool_opts.marker & POM_ENDPI) {
4681 yyerror("endpoint-independent cannot be redefined");
4682 YYERROR;
4683 }
4684 pool_opts.marker |= POM_ENDPI;
4685 pool_opts.opts |= PF_POOL_ENDPI;
4686 }
4687 | IPV6NH {
4688 if (pool_opts.marker & POM_IPV6NH) {
4689 yyerror("prefer-ipv6-nexthop cannot be redefined");
4690 YYERROR;
4691 }
4692 pool_opts.marker |= POM_IPV6NH;
4693 pool_opts.opts |= PF_POOL_IPV6NH;
4694 }
4695 | MAPEPORTSET number '/' number '/' number {
4696 if (pool_opts.mape.offset) {
4697 yyerror("map-e-portset cannot be redefined");
4698 YYERROR;
4699 }
4700 if (pool_opts.type) {
4701 yyerror("map-e-portset cannot be used with "
4702 "address pools");
4703 YYERROR;
4704 }
4705 if ($2 <= 0 || $2 >= 16) {
4706 yyerror("MAP-E PSID offset must be 1-15");
4707 YYERROR;
4708 }
4709 if ($4 < 0 || $4 >= 16 || $2 + $4 > 16) {
4710 yyerror("Invalid MAP-E PSID length");
4711 YYERROR;
4712 } else if ($4 == 0) {
4713 yyerror("PSID Length = 0: this means"
4714 " you do not need MAP-E");
4715 YYERROR;
4716 }
4717 if ($6 < 0 || $6 > 65535) {
4718 yyerror("Invalid MAP-E PSID");
4719 YYERROR;
4720 }
4721 pool_opts.mape.offset = $2;
4722 pool_opts.mape.psidlen = $4;
4723 pool_opts.mape.psid = $6;
4724 }
4725 ;
4726
4727 binat_redirspec : /* empty */ { $$ = NULL; }
4728 | ARROW host {
4729 $$ = calloc(1, sizeof(struct redirspec));
4730 if ($$ == NULL)
4731 err(1, "redirspec: calloc");
4732 $$->host = $2;
4733 $$->rport.a = $$->rport.b = $$->rport.t = 0;
4734 }
4735 | ARROW host PORT portstar {
4736 $$ = calloc(1, sizeof(struct redirspec));
4737 if ($$ == NULL)
4738 err(1, "redirspec: calloc");
4739 $$->host = $2;
4740 $$->rport = $4;
4741 }
4742 ;
4743
4744 natpasslog : /* empty */ { $$.b1 = $$.b2 = 0; $$.w2 = 0; }
4745 | PASS { $$.b1 = 1; $$.b2 = 0; $$.w2 = 0; }
4746 | PASS log { $$.b1 = 1; $$.b2 = $2.log; $$.w2 = $2.logif; }
4747 | log { $$.b1 = 0; $$.b2 = $1.log; $$.w2 = $1.logif; }
4748 ;
4749
4750 nataction : no NAT natpasslog {
4751 if ($1 && $3.b1) {
4752 yyerror("\"pass\" not valid with \"no\"");
4753 YYERROR;
4754 }
4755 if ($1)
4756 $$.b1 = PF_NONAT;
4757 else
4758 $$.b1 = PF_NAT;
4759 $$.b2 = $3.b1;
4760 $$.w = $3.b2;
4761 $$.w2 = $3.w2;
4762 }
4763 | no RDR natpasslog {
4764 if ($1 && $3.b1) {
4765 yyerror("\"pass\" not valid with \"no\"");
4766 YYERROR;
4767 }
4768 if ($1)
4769 $$.b1 = PF_NORDR;
4770 else
4771 $$.b1 = PF_RDR;
4772 $$.b2 = $3.b1;
4773 $$.w = $3.b2;
4774 $$.w2 = $3.w2;
4775 }
4776 ;
4777
4778 natrule : nataction interface af proto fromto tag tagged rtable
4779 nat_redirspec
4780 {
4781 struct pfctl_rule r;
4782 struct node_state_opt *o;
4783
4784 if (check_rulestate(PFCTL_STATE_NAT))
4785 YYERROR;
4786
4787 pfctl_init_rule(&r);
4788
4789 r.action = $1.b1;
4790 r.natpass = $1.b2;
4791 r.log = $1.w;
4792 r.logif = $1.w2;
4793 r.af = $3;
4794
4795 if (!r.af) {
4796 if ($5.src.host && $5.src.host->af &&
4797 !$5.src.host->ifindex)
4798 r.af = $5.src.host->af;
4799 else if ($5.dst.host && $5.dst.host->af &&
4800 !$5.dst.host->ifindex)
4801 r.af = $5.dst.host->af;
4802 }
4803
4804 if ($6 != NULL)
4805 if (strlcpy(r.tagname, $6, PF_TAG_NAME_SIZE) >=
4806 PF_TAG_NAME_SIZE) {
4807 yyerror("tag too long, max %u chars",
4808 PF_TAG_NAME_SIZE - 1);
4809 YYERROR;
4810 }
4811
4812 if ($7.name)
4813 if (strlcpy(r.match_tagname, $7.name,
4814 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4815 yyerror("tag too long, max %u chars",
4816 PF_TAG_NAME_SIZE - 1);
4817 YYERROR;
4818 }
4819 r.match_tag_not = $7.neg;
4820 r.rtableid = $8;
4821
4822 if (r.action == PF_NONAT || r.action == PF_NORDR) {
4823 if ($9 != NULL) {
4824 yyerror("translation rule with 'no' "
4825 "does not need '->'");
4826 YYERROR;
4827 }
4828 } else {
4829 if ($9 == NULL || $9->host == NULL) {
4830 yyerror("translation rule requires '-> "
4831 "address'");
4832 YYERROR;
4833 }
4834 if ($9->pool_opts.opts & PF_POOL_IPV6NH) {
4835 yyerror("The prefer-ipv6-nexthop option "
4836 "can't be used for nat/rdr/binat pools"
4837 );
4838 YYERROR;
4839 }
4840 if (!r.af && ! $9->host->ifindex)
4841 r.af = $9->host->af;
4842
4843 remove_invalid_hosts(&$9->host, &r.af);
4844 if (invalid_redirect($9->host, r.af))
4845 YYERROR;
4846 if ($9->host->addr.type == PF_ADDR_DYNIFTL) {
4847 if (($9->host = gen_dynnode($9->host, r.af)) == NULL)
4848 err(1, "calloc");
4849 }
4850 if (check_netmask($9->host, r.af))
4851 YYERROR;
4852 }
4853
4854 o = keep_state_defaults;
4855 while (o) {
4856 switch (o->type) {
4857 case PF_STATE_OPT_PFLOW:
4858 if (r.rule_flag & PFRULE_PFLOW) {
4859 yyerror("state pflow option: "
4860 "multiple definitions");
4861 YYERROR;
4862 }
4863 r.rule_flag |= PFRULE_PFLOW;
4864 break;
4865 }
4866 o = o->next;
4867 }
4868
4869 expand_rule(&r, false, $2, NULL, $9, NULL, $4,
4870 $5.src_os, $5.src.host, $5.src.port, $5.dst.host,
4871 $5.dst.port, 0, 0, 0, 0, "");
4872 }
4873 ;
4874
4875 binatrule : no BINAT natpasslog interface af proto FROM ipspec toipspec tag
4876 tagged rtable binat_redirspec
4877 {
4878 struct pfctl_rule binat;
4879 struct pfctl_pooladdr *pa;
4880
4881 if (check_rulestate(PFCTL_STATE_NAT))
4882 YYERROR;
4883 if (disallow_urpf_failed($9, "\"urpf-failed\" is not "
4884 "permitted as a binat destination"))
4885 YYERROR;
4886
4887 pfctl_init_rule(&binat);
4888
4889 if ($1 && $3.b1) {
4890 yyerror("\"pass\" not valid with \"no\"");
4891 YYERROR;
4892 }
4893 if ($1)
4894 binat.action = PF_NOBINAT;
4895 else
4896 binat.action = PF_BINAT;
4897 binat.natpass = $3.b1;
4898 binat.log = $3.b2;
4899 binat.logif = $3.w2;
4900 binat.af = $5;
4901 if (!binat.af && $8 != NULL && $8->af)
4902 binat.af = $8->af;
4903 if (!binat.af && $9 != NULL && $9->af)
4904 binat.af = $9->af;
4905
4906 if (!binat.af && $13 != NULL && $13->host)
4907 binat.af = $13->host->af;
4908 if (!binat.af) {
4909 yyerror("address family (inet/inet6) "
4910 "undefined");
4911 YYERROR;
4912 }
4913
4914 if ($4 != NULL) {
4915 memcpy(binat.ifname, $4->ifname,
4916 sizeof(binat.ifname));
4917 binat.ifnot = $4->not;
4918 free($4);
4919 }
4920
4921 if ($10 != NULL)
4922 if (strlcpy(binat.tagname, $10,
4923 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4924 yyerror("tag too long, max %u chars",
4925 PF_TAG_NAME_SIZE - 1);
4926 YYERROR;
4927 }
4928 if ($11.name)
4929 if (strlcpy(binat.match_tagname, $11.name,
4930 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
4931 yyerror("tag too long, max %u chars",
4932 PF_TAG_NAME_SIZE - 1);
4933 YYERROR;
4934 }
4935 binat.match_tag_not = $11.neg;
4936 binat.rtableid = $12;
4937
4938 if ($6 != NULL) {
4939 binat.proto = $6->proto;
4940 free($6);
4941 }
4942
4943 if ($8 != NULL && disallow_table($8, "invalid use of "
4944 "table <%s> as the source address of a binat rule"))
4945 YYERROR;
4946 if ($8 != NULL && disallow_alias($8, "invalid use of "
4947 "interface (%s) as the source address of a binat "
4948 "rule"))
4949 YYERROR;
4950 if ($13 != NULL && $13->host != NULL && disallow_table(
4951 $13->host, "invalid use of table <%s> as the "
4952 "redirect address of a binat rule"))
4953 YYERROR;
4954 if ($13 != NULL && $13->host != NULL && disallow_alias(
4955 $13->host, "invalid use of interface (%s) as the "
4956 "redirect address of a binat rule"))
4957 YYERROR;
4958
4959 if ($8 != NULL) {
4960 if ($8->next) {
4961 yyerror("multiple binat ip addresses");
4962 YYERROR;
4963 }
4964 if ($8->addr.type == PF_ADDR_DYNIFTL)
4965 $8->af = binat.af;
4966 if ($8->af != binat.af) {
4967 yyerror("binat ip versions must match");
4968 YYERROR;
4969 }
4970 if ($8->addr.type == PF_ADDR_DYNIFTL) {
4971 if (($8 = gen_dynnode($8, binat.af)) == NULL)
4972 err(1, "calloc");
4973 }
4974 if (check_netmask($8, binat.af))
4975 YYERROR;
4976 memcpy(&binat.src.addr, &$8->addr,
4977 sizeof(binat.src.addr));
4978 free($8);
4979 }
4980 if ($9 != NULL) {
4981 if ($9->next) {
4982 yyerror("multiple binat ip addresses");
4983 YYERROR;
4984 }
4985 if ($9->af != binat.af && $9->af) {
4986 yyerror("binat ip versions must match");
4987 YYERROR;
4988 }
4989 if ($9->addr.type == PF_ADDR_DYNIFTL) {
4990 if (($9 = gen_dynnode($9, binat.af)) == NULL)
4991 err(1, "calloc");
4992 }
4993 if (check_netmask($9, binat.af))
4994 YYERROR;
4995 memcpy(&binat.dst.addr, &$9->addr,
4996 sizeof(binat.dst.addr));
4997 binat.dst.neg = $9->not;
4998 free($9);
4999 }
5000
5001 if (binat.action == PF_NOBINAT) {
5002 if ($13 != NULL) {
5003 yyerror("'no binat' rule does not need"
5004 " '->'");
5005 YYERROR;
5006 }
5007 } else {
5008 if ($13 == NULL || $13->host == NULL) {
5009 yyerror("'binat' rule requires"
5010 " '-> address'");
5011 YYERROR;
5012 }
5013
5014 remove_invalid_hosts(&$13->host, &binat.af);
5015 if (invalid_redirect($13->host, binat.af))
5016 YYERROR;
5017 if ($13->host->next != NULL) {
5018 yyerror("binat rule must redirect to "
5019 "a single address");
5020 YYERROR;
5021 }
5022 if ($13->host->addr.type == PF_ADDR_DYNIFTL) {
5023 if (($13->host = gen_dynnode($13->host, binat.af)) == NULL)
5024 err(1, "calloc");
5025 }
5026 if (check_netmask($13->host, binat.af))
5027 YYERROR;
5028
5029 if (!PF_AZERO(&binat.src.addr.v.a.mask,
5030 binat.af) &&
5031 !PF_AEQ(&binat.src.addr.v.a.mask,
5032 &$13->host->addr.v.a.mask, binat.af)) {
5033 yyerror("'binat' source mask and "
5034 "redirect mask must be the same");
5035 YYERROR;
5036 }
5037
5038 pa = calloc(1, sizeof(struct pfctl_pooladdr));
5039 if (pa == NULL)
5040 err(1, "binat: calloc");
5041 pa->addr = $13->host->addr;
5042 pa->ifname[0] = 0;
5043 pa->af = $13->host->af;
5044 TAILQ_INSERT_TAIL(&binat.rdr.list,
5045 pa, entries);
5046
5047 free($13);
5048 }
5049
5050 pfctl_append_rule(pf, &binat, "");
5051 }
5052 ;
5053
5054 tag : /* empty */ { $$ = NULL; }
5055 | TAG STRING { $$ = $2; }
5056 ;
5057
5058 tagged : /* empty */ { $$.neg = 0; $$.name = NULL; }
5059 | not TAGGED string { $$.neg = $1; $$.name = $3; }
5060 ;
5061
5062 rtable : /* empty */ { $$ = -1; }
5063 | RTABLE NUMBER {
5064 if ($2 < 0 || $2 > rt_tableid_max()) {
5065 yyerror("invalid rtable id");
5066 YYERROR;
5067 }
5068 $$ = $2;
5069 }
5070 ;
5071
5072 route_host : STRING {
5073 $$ = calloc(1, sizeof(struct node_host));
5074 if ($$ == NULL)
5075 err(1, "route_host: calloc");
5076 if (strlen($1) >= IFNAMSIZ) {
5077 yyerror("interface name too long");
5078 YYERROR;
5079 }
5080 $$->ifname = strdup($1);
5081 set_ipmask($$, 128);
5082 $$->next = NULL;
5083 $$->tail = $$;
5084 }
5085 | '(' STRING host ')' {
5086 struct node_host *n;
5087
5088 $$ = $3;
5089 for (n = $3; n != NULL; n = n->next) {
5090 if (strlen($2) >= IFNAMSIZ) {
5091 yyerror("interface name too long");
5092 YYERROR;
5093 }
5094 n->ifname = strdup($2);
5095 }
5096 }
5097 ;
5098
5099 route_host_list : route_host optnl { $$ = $1; }
5100 | route_host_list comma route_host optnl {
5101 $1->tail->next = $3;
5102 $1->tail = $3->tail;
5103 $$ = $1;
5104 }
5105 ;
5106
5107 routespec : route_host { $$ = $1; }
5108 | '{' optnl route_host_list '}' { $$ = $3; }
5109 ;
5110
5111 route : /* empty */ {
5112 $$.rt = PF_NOPFROUTE;
5113 }
5114 | FASTROUTE {
5115 /* backwards-compat */
5116 $$.rt = PF_NOPFROUTE;
5117 }
5118 | ROUTETO route_redirspec {
5119 $$.rt = PF_ROUTETO;
5120 $$.redirspec = $2;
5121 }
5122 | REPLYTO route_redirspec {
5123 $$.rt = PF_REPLYTO;
5124 $$.redirspec = $2;
5125 }
5126 | DUPTO route_redirspec {
5127 $$.rt = PF_DUPTO;
5128 $$.redirspec = $2;
5129 }
5130 ;
5131
5132 timeout_spec : STRING NUMBER
5133 {
5134 if (check_rulestate(PFCTL_STATE_OPTION)) {
5135 free($1);
5136 YYERROR;
5137 }
5138 if ($2 < 0 || $2 > UINT_MAX) {
5139 yyerror("only positive values permitted");
5140 YYERROR;
5141 }
5142 if (pfctl_apply_timeout(pf, $1, $2, 0) != 0) {
5143 yyerror("unknown timeout %s", $1);
5144 free($1);
5145 YYERROR;
5146 }
5147 free($1);
5148 }
5149 | INTERVAL NUMBER {
5150 if (check_rulestate(PFCTL_STATE_OPTION))
5151 YYERROR;
5152 if ($2 < 0 || $2 > UINT_MAX) {
5153 yyerror("only positive values permitted");
5154 YYERROR;
5155 }
5156 if (pfctl_apply_timeout(pf, "interval", $2, 0) != 0)
5157 YYERROR;
5158 }
5159 ;
5160
5161 timeout_list : timeout_list comma timeout_spec optnl
5162 | timeout_spec optnl
5163 ;
5164
5165 limit_spec : STRING NUMBER
5166 {
5167 if (check_rulestate(PFCTL_STATE_OPTION)) {
5168 free($1);
5169 YYERROR;
5170 }
5171 if ($2 < 0 || $2 > UINT_MAX) {
5172 yyerror("only positive values permitted");
5173 YYERROR;
5174 }
5175 if (pfctl_apply_limit(pf, $1, $2) != 0) {
5176 yyerror("unable to set limit %s %u", $1, $2);
5177 free($1);
5178 YYERROR;
5179 }
5180 free($1);
5181 }
5182 ;
5183
5184 limit_list : limit_list comma limit_spec optnl
5185 | limit_spec optnl
5186 ;
5187
5188 comma : ','
5189 | /* empty */
5190 ;
5191
5192 yesno : NO { $$ = 0; }
5193 | STRING {
5194 if (!strcmp($1, "yes"))
5195 $$ = 1;
5196 else {
5197 yyerror("invalid value '%s', expected 'yes' "
5198 "or 'no'", $1);
5199 free($1);
5200 YYERROR;
5201 }
5202 free($1);
5203 }
5204 ;
5205
5206 unaryop : '=' { $$ = PF_OP_EQ; }
5207 | NE { $$ = PF_OP_NE; }
5208 | LE { $$ = PF_OP_LE; }
5209 | '<' { $$ = PF_OP_LT; }
5210 | GE { $$ = PF_OP_GE; }
5211 | '>' { $$ = PF_OP_GT; }
5212 ;
5213
5214 %%
5215
5216 int
5217 yyerror(const char *fmt, ...)
5218 {
5219 va_list ap;
5220
5221 file->errors++;
5222 va_start(ap, fmt);
5223 fprintf(stderr, "%s:%d: ", file->name, yylval.lineno);
5224 vfprintf(stderr, fmt, ap);
5225 fprintf(stderr, "\n");
5226 va_end(ap);
5227 return (0);
5228 }
5229
5230 int
validate_range(uint8_t op,uint16_t p1,uint16_t p2)5231 validate_range(uint8_t op, uint16_t p1, uint16_t p2)
5232 {
5233 uint16_t a = ntohs(p1);
5234 uint16_t b = ntohs(p2);
5235
5236 if ((op == PF_OP_RRG && a > b) || /* 34:12, i.e. none */
5237 (op == PF_OP_IRG && a >= b) || /* 34><12, i.e. none */
5238 (op == PF_OP_XRG && a > b)) /* 34<>22, i.e. all */
5239 return 1;
5240 return 0;
5241 }
5242
5243 int
disallow_table(struct node_host * h,const char * fmt)5244 disallow_table(struct node_host *h, const char *fmt)
5245 {
5246 for (; h != NULL; h = h->next)
5247 if (h->addr.type == PF_ADDR_TABLE) {
5248 yyerror(fmt, h->addr.v.tblname);
5249 return (1);
5250 }
5251 return (0);
5252 }
5253
5254 int
disallow_urpf_failed(struct node_host * h,const char * fmt)5255 disallow_urpf_failed(struct node_host *h, const char *fmt)
5256 {
5257 for (; h != NULL; h = h->next)
5258 if (h->addr.type == PF_ADDR_URPFFAILED) {
5259 yyerror(fmt);
5260 return (1);
5261 }
5262 return (0);
5263 }
5264
5265 int
disallow_alias(struct node_host * h,const char * fmt)5266 disallow_alias(struct node_host *h, const char *fmt)
5267 {
5268 for (; h != NULL; h = h->next)
5269 if (DYNIF_MULTIADDR(h->addr)) {
5270 yyerror(fmt, h->addr.v.tblname);
5271 return (1);
5272 }
5273 return (0);
5274 }
5275
5276 int
rule_consistent(struct pfctl_rule * r,int anchor_call)5277 rule_consistent(struct pfctl_rule *r, int anchor_call)
5278 {
5279 int problems = 0;
5280
5281 switch (r->action) {
5282 case PF_PASS:
5283 case PF_MATCH:
5284 case PF_DROP:
5285 case PF_SCRUB:
5286 case PF_NOSCRUB:
5287 problems = filter_consistent(r, anchor_call);
5288 break;
5289 case PF_NAT:
5290 case PF_NONAT:
5291 problems = nat_consistent(r);
5292 break;
5293 case PF_RDR:
5294 case PF_NORDR:
5295 problems = rdr_consistent(r);
5296 break;
5297 case PF_BINAT:
5298 case PF_NOBINAT:
5299 default:
5300 break;
5301 }
5302 return (problems);
5303 }
5304
5305 int
filter_consistent(struct pfctl_rule * r,int anchor_call)5306 filter_consistent(struct pfctl_rule *r, int anchor_call)
5307 {
5308 int problems = 0;
5309
5310 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
5311 r->proto != IPPROTO_SCTP &&
5312 (r->src.port_op || r->dst.port_op)) {
5313 yyerror("port only applies to tcp/udp/sctp");
5314 problems++;
5315 }
5316 if (r->proto != IPPROTO_ICMP && r->proto != IPPROTO_ICMPV6 &&
5317 (r->type || r->code)) {
5318 yyerror("icmp-type/code only applies to icmp");
5319 problems++;
5320 }
5321 if (!r->af && (r->type || r->code)) {
5322 yyerror("must indicate address family with icmp-type/code");
5323 problems++;
5324 }
5325 if (r->rule_flag & PFRULE_AFTO && r->af == r->naf) {
5326 yyerror("must indicate different address family with af-to");
5327 problems++;
5328 }
5329 if (r->overload_tblname[0] &&
5330 r->max_src_conn == 0 && r->max_src_conn_rate.seconds == 0) {
5331 yyerror("'overload' requires 'max-src-conn' "
5332 "or 'max-src-conn-rate'");
5333 problems++;
5334 }
5335 if ((r->proto == IPPROTO_ICMP && r->af == AF_INET6) ||
5336 (r->proto == IPPROTO_ICMPV6 && r->af == AF_INET)) {
5337 yyerror("proto %s doesn't match address family %s",
5338 r->proto == IPPROTO_ICMP ? "icmp" : "icmp6",
5339 r->af == AF_INET ? "inet" : "inet6");
5340 problems++;
5341 }
5342 if (r->allow_opts && r->action != PF_PASS && r->action != PF_MATCH) {
5343 yyerror("allow-opts can only be specified for pass or "
5344 "match rules");
5345 problems++;
5346 }
5347 if (r->rule_flag & PFRULE_FRAGMENT && (r->src.port_op ||
5348 r->dst.port_op || r->flagset || r->type || r->code)) {
5349 yyerror("fragments can be filtered only on IP header fields");
5350 problems++;
5351 }
5352 if (r->rule_flag & PFRULE_RETURNRST && r->proto != IPPROTO_TCP) {
5353 yyerror("return-rst can only be applied to TCP rules");
5354 problems++;
5355 }
5356 if (r->max_src_nodes && !(r->rule_flag & PFRULE_RULESRCTRACK)) {
5357 yyerror("max-src-nodes requires 'source-track rule'");
5358 problems++;
5359 }
5360 if (r->action != PF_PASS && r->keep_state) {
5361 yyerror("keep state is great, but only for pass rules");
5362 problems++;
5363 }
5364 if (r->rule_flag & PFRULE_STATESLOPPY &&
5365 (r->keep_state == PF_STATE_MODULATE ||
5366 r->keep_state == PF_STATE_SYNPROXY)) {
5367 yyerror("sloppy state matching cannot be used with "
5368 "synproxy state or modulate state");
5369 problems++;
5370 }
5371 if ((r->keep_state == PF_STATE_SYNPROXY) && (r->direction != PF_IN))
5372 fprintf(stderr, "%s:%d: warning: "
5373 "synproxy used for inbound rules only, "
5374 "ignored for outbound\n", file->name, yylval.lineno);
5375 if (r->rule_flag & PFRULE_AFTO && r->rt) {
5376 if (r->rt != PF_ROUTETO && r->rt != PF_REPLYTO) {
5377 yyerror("dup-to "
5378 "must not be used on af-to rules");
5379 problems++;
5380 }
5381 }
5382 /* Basic rule sanity check. */
5383 switch (r->action) {
5384 case PF_MATCH:
5385 if (r->divert.port) {
5386 yyerror("divert is not supported on match rules");
5387 problems++;
5388 }
5389 if (r->rt) {
5390 yyerror("route-to, reply-to, dup-to and fastroute "
5391 "must not be used on match rules");
5392 problems++;
5393 }
5394 if (r->rule_flag & PFRULE_AFTO) {
5395 yyerror("af-to is not supported on match rules");
5396 problems++;
5397 }
5398 break;
5399 case PF_DROP:
5400 if (r->rt) {
5401 yyerror("route-to, reply-to and dup-to "
5402 "are not supported on block rules");
5403 problems++;
5404 }
5405 break;
5406 default:;
5407 }
5408 if (!TAILQ_EMPTY(&(r->nat.list)) || !TAILQ_EMPTY(&(r->rdr.list))) {
5409 if (r->action != PF_MATCH && !r->keep_state) {
5410 yyerror("nat-to and rdr-to require keep state");
5411 problems++;
5412 }
5413 if (r->direction == PF_INOUT) {
5414 yyerror("nat-to and rdr-to require a direction");
5415 problems++;
5416 }
5417 }
5418 if (r->route.opts & PF_POOL_STICKYADDR && !r->keep_state) {
5419 yyerror("'sticky-address' requires 'keep state'");
5420 }
5421 return (-problems);
5422 }
5423
5424 int
nat_consistent(struct pfctl_rule * r)5425 nat_consistent(struct pfctl_rule *r)
5426 {
5427 return (0); /* yeah! */
5428 }
5429
5430 int
rdr_consistent(struct pfctl_rule * r)5431 rdr_consistent(struct pfctl_rule *r)
5432 {
5433 int problems = 0;
5434
5435 if (r->proto != IPPROTO_TCP && r->proto != IPPROTO_UDP &&
5436 r->proto != IPPROTO_SCTP) {
5437 if (r->src.port_op) {
5438 yyerror("src port only applies to tcp/udp/sctp");
5439 problems++;
5440 }
5441 if (r->dst.port_op) {
5442 yyerror("dst port only applies to tcp/udp/sctp");
5443 problems++;
5444 }
5445 if (r->rdr.proxy_port[0]) {
5446 yyerror("rdr port only applies to tcp/udp/sctp");
5447 problems++;
5448 }
5449 }
5450 if (r->dst.port_op &&
5451 r->dst.port_op != PF_OP_EQ && r->dst.port_op != PF_OP_RRG) {
5452 yyerror("invalid port operator for rdr destination port");
5453 problems++;
5454 }
5455 return (-problems);
5456 }
5457
5458 int
process_tabledef(char * name,struct table_opts * opts,int popts)5459 process_tabledef(char *name, struct table_opts *opts, int popts)
5460 {
5461 struct pfr_buffer ab;
5462 struct node_tinit *ti;
5463 struct pfr_uktable *ukt;
5464 unsigned long maxcount;
5465 size_t s = sizeof(maxcount);
5466
5467 bzero(&ab, sizeof(ab));
5468 ab.pfrb_type = PFRB_ADDRS;
5469 SIMPLEQ_FOREACH(ti, &opts->init_nodes, entries) {
5470 if (ti->file)
5471 if (pfr_buf_load(&ab, ti->file, 0, append_addr, popts)) {
5472 if (errno)
5473 yyerror("cannot load \"%s\": %s",
5474 ti->file, strerror(errno));
5475 else
5476 yyerror("file \"%s\" contains bad data",
5477 ti->file);
5478 goto _error;
5479 }
5480 if (ti->host)
5481 if (append_addr_host(&ab, ti->host, 0, 0)) {
5482 yyerror("cannot create address buffer: %s",
5483 strerror(errno));
5484 goto _error;
5485 }
5486 }
5487 if (pf->opts & PF_OPT_VERBOSE)
5488 print_tabledef(name, opts->flags, opts->init_addr,
5489 &opts->init_nodes);
5490 if (!(pf->opts & PF_OPT_NOACTION) ||
5491 (pf->opts & PF_OPT_DUMMYACTION))
5492 warn_duplicate_tables(name, pf->anchor->path);
5493 else if (pf->opts & PF_OPT_VERBOSE)
5494 fprintf(stderr, "%s:%d: skipping duplicate table checks"
5495 " for <%s>\n", file->name, yylval.lineno, name);
5496 /*
5497 * postpone definition of non-root tables to moment
5498 * when path is fully resolved.
5499 */
5500 if (pf->asd > 0) {
5501 ukt = calloc(1, sizeof(struct pfr_uktable));
5502 if (ukt == NULL) {
5503 DBGPRINT(
5504 "%s:%d: not enough memory for <%s>\n", file->name,
5505 yylval.lineno, name);
5506 goto _error;
5507 }
5508 } else
5509 ukt = NULL;
5510 if (!(pf->opts & PF_OPT_NOACTION) &&
5511 pfctl_define_table(name, opts->flags, opts->init_addr,
5512 pf->anchor->path, &ab, pf->anchor->ruleset.tticket, ukt)) {
5513
5514 if (sysctlbyname("net.pf.request_maxcount", &maxcount, &s,
5515 NULL, 0) == -1)
5516 maxcount = 65535;
5517
5518 if (ab.pfrb_size > maxcount)
5519 yyerror("cannot define table %s: too many elements.\n"
5520 "Consider increasing net.pf.request_maxcount.",
5521 name);
5522 else
5523 yyerror("cannot define table %s: %s", name,
5524 pf_strerror(errno));
5525
5526 goto _error;
5527 }
5528
5529 if (ukt != NULL) {
5530 ukt->pfrukt_init_addr = opts->init_addr;
5531 if (RB_INSERT(pfr_ktablehead, &pfr_ktables,
5532 &ukt->pfrukt_kt) != NULL) {
5533 /*
5534 * I think this should not happen, because
5535 * pfctl_define_table() above does the same check
5536 * effectively.
5537 */
5538 DBGPRINT(
5539 "%s:%d table %s already exists in %s\n",
5540 file->name, yylval.lineno,
5541 ukt->pfrukt_name, pf->anchor->path);
5542 free(ukt);
5543 goto _error;
5544 }
5545 DBGPRINT("%s %s@%s inserted to tree\n",
5546 __func__, ukt->pfrukt_name, pf->anchor->path);
5547 } else
5548 DBGPRINT("%s ukt is null\n", __func__);
5549
5550 pf->tdirty = 1;
5551 pfr_buf_clear(&ab);
5552 return (0);
5553 _error:
5554 pfr_buf_clear(&ab);
5555 return (-1);
5556 }
5557
5558 struct keywords {
5559 const char *k_name;
5560 int k_val;
5561 };
5562
5563 /* macro gore, but you should've seen the prior indentation nightmare... */
5564
5565 #define FREE_LIST(T,r) \
5566 do { \
5567 T *p, *node = r; \
5568 while (node != NULL) { \
5569 p = node; \
5570 node = node->next; \
5571 free(p); \
5572 } \
5573 } while (0)
5574
5575 #define LOOP_THROUGH(T,n,r,C) \
5576 do { \
5577 T *n; \
5578 if (r == NULL) { \
5579 r = calloc(1, sizeof(T)); \
5580 if (r == NULL) \
5581 err(1, "LOOP: calloc"); \
5582 r->next = NULL; \
5583 } \
5584 n = r; \
5585 while (n != NULL) { \
5586 do { \
5587 C; \
5588 } while (0); \
5589 n = n->next; \
5590 } \
5591 } while (0)
5592
5593 void
expand_label_str(char * label,size_t len,const char * srch,const char * repl)5594 expand_label_str(char *label, size_t len, const char *srch, const char *repl)
5595 {
5596 char *tmp;
5597 char *p, *q;
5598
5599 if ((tmp = calloc(1, len)) == NULL)
5600 err(1, "%s: calloc", __func__);
5601 p = q = label;
5602 while ((q = strstr(p, srch)) != NULL) {
5603 *q = '\0';
5604 if ((strlcat(tmp, p, len) >= len) ||
5605 (strlcat(tmp, repl, len) >= len))
5606 errx(1, "%s: label too long", __func__);
5607 q += strlen(srch);
5608 p = q;
5609 }
5610 if (strlcat(tmp, p, len) >= len)
5611 errx(1, "%s: label too long", __func__);
5612 strlcpy(label, tmp, len); /* always fits */
5613 free(tmp);
5614 }
5615
5616 void
expand_label_if(const char * name,char * label,size_t len,const char * ifname)5617 expand_label_if(const char *name, char *label, size_t len, const char *ifname)
5618 {
5619 if (strstr(label, name) != NULL) {
5620 if (!*ifname)
5621 expand_label_str(label, len, name, "any");
5622 else
5623 expand_label_str(label, len, name, ifname);
5624 }
5625 }
5626
5627 void
expand_label_addr(const char * name,char * label,size_t len,sa_family_t af,struct pf_rule_addr * addr)5628 expand_label_addr(const char *name, char *label, size_t len, sa_family_t af,
5629 struct pf_rule_addr *addr)
5630 {
5631 char tmp[64], tmp_not[66];
5632
5633 if (strstr(label, name) != NULL) {
5634 switch (addr->addr.type) {
5635 case PF_ADDR_DYNIFTL:
5636 snprintf(tmp, sizeof(tmp), "(%s)", addr->addr.v.ifname);
5637 break;
5638 case PF_ADDR_TABLE:
5639 snprintf(tmp, sizeof(tmp), "<%s>", addr->addr.v.tblname);
5640 break;
5641 case PF_ADDR_NOROUTE:
5642 snprintf(tmp, sizeof(tmp), "no-route");
5643 break;
5644 case PF_ADDR_URPFFAILED:
5645 snprintf(tmp, sizeof(tmp), "urpf-failed");
5646 break;
5647 case PF_ADDR_ADDRMASK:
5648 if (!af || (PF_AZERO(&addr->addr.v.a.addr, af) &&
5649 PF_AZERO(&addr->addr.v.a.mask, af)))
5650 snprintf(tmp, sizeof(tmp), "any");
5651 else {
5652 char a[48];
5653 int bits;
5654
5655 if (inet_ntop(af, &addr->addr.v.a.addr, a,
5656 sizeof(a)) == NULL)
5657 snprintf(tmp, sizeof(tmp), "?");
5658 else {
5659 bits = unmask(&addr->addr.v.a.mask);
5660 if ((af == AF_INET && bits < 32) ||
5661 (af == AF_INET6 && bits < 128))
5662 snprintf(tmp, sizeof(tmp),
5663 "%s/%d", a, bits);
5664 else
5665 snprintf(tmp, sizeof(tmp),
5666 "%s", a);
5667 }
5668 }
5669 break;
5670 default:
5671 snprintf(tmp, sizeof(tmp), "?");
5672 break;
5673 }
5674
5675 if (addr->neg) {
5676 snprintf(tmp_not, sizeof(tmp_not), "! %s", tmp);
5677 expand_label_str(label, len, name, tmp_not);
5678 } else
5679 expand_label_str(label, len, name, tmp);
5680 }
5681 }
5682
5683 void
expand_label_port(const char * name,char * label,size_t len,struct pf_rule_addr * addr)5684 expand_label_port(const char *name, char *label, size_t len,
5685 struct pf_rule_addr *addr)
5686 {
5687 char a1[6], a2[6], op[13] = "";
5688
5689 if (strstr(label, name) != NULL) {
5690 snprintf(a1, sizeof(a1), "%u", ntohs(addr->port[0]));
5691 snprintf(a2, sizeof(a2), "%u", ntohs(addr->port[1]));
5692 if (!addr->port_op)
5693 ;
5694 else if (addr->port_op == PF_OP_IRG)
5695 snprintf(op, sizeof(op), "%s><%s", a1, a2);
5696 else if (addr->port_op == PF_OP_XRG)
5697 snprintf(op, sizeof(op), "%s<>%s", a1, a2);
5698 else if (addr->port_op == PF_OP_EQ)
5699 snprintf(op, sizeof(op), "%s", a1);
5700 else if (addr->port_op == PF_OP_NE)
5701 snprintf(op, sizeof(op), "!=%s", a1);
5702 else if (addr->port_op == PF_OP_LT)
5703 snprintf(op, sizeof(op), "<%s", a1);
5704 else if (addr->port_op == PF_OP_LE)
5705 snprintf(op, sizeof(op), "<=%s", a1);
5706 else if (addr->port_op == PF_OP_GT)
5707 snprintf(op, sizeof(op), ">%s", a1);
5708 else if (addr->port_op == PF_OP_GE)
5709 snprintf(op, sizeof(op), ">=%s", a1);
5710 expand_label_str(label, len, name, op);
5711 }
5712 }
5713
5714 void
expand_label_proto(const char * name,char * label,size_t len,u_int8_t proto)5715 expand_label_proto(const char *name, char *label, size_t len, u_int8_t proto)
5716 {
5717 const char *protoname;
5718 char n[4];
5719
5720 if (strstr(label, name) != NULL) {
5721 protoname = pfctl_proto2name(proto);
5722 if (protoname != NULL)
5723 expand_label_str(label, len, name, protoname);
5724 else {
5725 snprintf(n, sizeof(n), "%u", proto);
5726 expand_label_str(label, len, name, n);
5727 }
5728 }
5729 }
5730
5731 void
expand_label_nr(const char * name,char * label,size_t len,struct pfctl_rule * r)5732 expand_label_nr(const char *name, char *label, size_t len,
5733 struct pfctl_rule *r)
5734 {
5735 char n[11];
5736
5737 if (strstr(label, name) != NULL) {
5738 snprintf(n, sizeof(n), "%u", r->nr);
5739 expand_label_str(label, len, name, n);
5740 }
5741 }
5742
5743 void
expand_label(char * label,size_t len,struct pfctl_rule * r)5744 expand_label(char *label, size_t len, struct pfctl_rule *r)
5745 {
5746 expand_label_if("$if", label, len, r->ifname);
5747 expand_label_addr("$srcaddr", label, len, r->af, &r->src);
5748 expand_label_addr("$dstaddr", label, len, r->af, &r->dst);
5749 expand_label_port("$srcport", label, len, &r->src);
5750 expand_label_port("$dstport", label, len, &r->dst);
5751 expand_label_proto("$proto", label, len, r->proto);
5752 expand_label_nr("$nr", label, len, r);
5753 }
5754
5755 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)5756 expand_altq(struct pf_altq *a, struct node_if *interfaces,
5757 struct node_queue *nqueues, struct node_queue_bw bwspec,
5758 struct node_queue_opt *opts)
5759 {
5760 struct pf_altq pa, pb;
5761 char qname[PF_QNAME_SIZE];
5762 struct node_queue *n;
5763 struct node_queue_bw bw;
5764 int errs = 0;
5765
5766 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
5767 FREE_LIST(struct node_if, interfaces);
5768 if (nqueues)
5769 FREE_LIST(struct node_queue, nqueues);
5770 return (0);
5771 }
5772
5773 LOOP_THROUGH(struct node_if, interface, interfaces,
5774 memcpy(&pa, a, sizeof(struct pf_altq));
5775 if (strlcpy(pa.ifname, interface->ifname,
5776 sizeof(pa.ifname)) >= sizeof(pa.ifname))
5777 errx(1, "%s: strlcpy", __func__);
5778
5779 if (interface->not) {
5780 yyerror("altq on ! <interface> is not supported");
5781 errs++;
5782 } else {
5783 if (eval_pfaltq(pf, &pa, &bwspec, opts))
5784 errs++;
5785 else
5786 if (pfctl_add_altq(pf, &pa))
5787 errs++;
5788
5789 if (pf->opts & PF_OPT_VERBOSE) {
5790 print_altq(&pf->paltq->altq, 0,
5791 &bwspec, opts);
5792 if (nqueues && nqueues->tail) {
5793 printf("queue { ");
5794 LOOP_THROUGH(struct node_queue, queue,
5795 nqueues,
5796 printf("%s ",
5797 queue->queue);
5798 );
5799 printf("}");
5800 }
5801 printf("\n");
5802 }
5803
5804 if (pa.scheduler == ALTQT_CBQ ||
5805 pa.scheduler == ALTQT_HFSC ||
5806 pa.scheduler == ALTQT_FAIRQ) {
5807 /* now create a root queue */
5808 memset(&pb, 0, sizeof(struct pf_altq));
5809 if (strlcpy(qname, "root_", sizeof(qname)) >=
5810 sizeof(qname))
5811 errx(1, "%s: strlcpy", __func__);
5812 if (strlcat(qname, interface->ifname,
5813 sizeof(qname)) >= sizeof(qname))
5814 errx(1, "%s: strlcat", __func__);
5815 if (strlcpy(pb.qname, qname,
5816 sizeof(pb.qname)) >= sizeof(pb.qname))
5817 errx(1, "%s: strlcpy", __func__);
5818 if (strlcpy(pb.ifname, interface->ifname,
5819 sizeof(pb.ifname)) >= sizeof(pb.ifname))
5820 errx(1, "%s: strlcpy", __func__);
5821 pb.qlimit = pa.qlimit;
5822 pb.scheduler = pa.scheduler;
5823 bw.bw_absolute = pa.ifbandwidth;
5824 bw.bw_percent = 0;
5825 if (eval_pfqueue(pf, &pb, &bw, opts))
5826 errs++;
5827 else
5828 if (pfctl_add_altq(pf, &pb))
5829 errs++;
5830 }
5831
5832 LOOP_THROUGH(struct node_queue, queue, nqueues,
5833 n = calloc(1, sizeof(struct node_queue));
5834 if (n == NULL)
5835 err(1, "%s: calloc", __func__);
5836 if (pa.scheduler == ALTQT_CBQ ||
5837 pa.scheduler == ALTQT_HFSC ||
5838 pa.scheduler == ALTQT_FAIRQ)
5839 if (strlcpy(n->parent, qname,
5840 sizeof(n->parent)) >=
5841 sizeof(n->parent))
5842 errx(1, "%s: strlcpy", __func__);
5843 if (strlcpy(n->queue, queue->queue,
5844 sizeof(n->queue)) >= sizeof(n->queue))
5845 errx(1, "%s: strlcpy", __func__);
5846 if (strlcpy(n->ifname, interface->ifname,
5847 sizeof(n->ifname)) >= sizeof(n->ifname))
5848 errx(1, "%s: strlcpy", __func__);
5849 n->scheduler = pa.scheduler;
5850 n->next = NULL;
5851 n->tail = n;
5852 if (queues == NULL)
5853 queues = n;
5854 else {
5855 queues->tail->next = n;
5856 queues->tail = n;
5857 }
5858 );
5859 }
5860 );
5861 FREE_LIST(struct node_if, interfaces);
5862 if (nqueues)
5863 FREE_LIST(struct node_queue, nqueues);
5864
5865 return (errs);
5866 }
5867
5868 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)5869 expand_queue(struct pf_altq *a, struct node_if *interfaces,
5870 struct node_queue *nqueues, struct node_queue_bw bwspec,
5871 struct node_queue_opt *opts)
5872 {
5873 struct node_queue *n, *nq;
5874 struct pf_altq pa;
5875 u_int8_t found = 0;
5876 u_int8_t errs = 0;
5877
5878 if ((pf->loadopt & PFCTL_FLAG_ALTQ) == 0) {
5879 FREE_LIST(struct node_queue, nqueues);
5880 return (0);
5881 }
5882
5883 if (queues == NULL) {
5884 yyerror("queue %s has no parent", a->qname);
5885 FREE_LIST(struct node_queue, nqueues);
5886 return (1);
5887 }
5888
5889 LOOP_THROUGH(struct node_if, interface, interfaces,
5890 LOOP_THROUGH(struct node_queue, tqueue, queues,
5891 if (!strncmp(a->qname, tqueue->queue, PF_QNAME_SIZE) &&
5892 (interface->ifname[0] == 0 ||
5893 (!interface->not && !strncmp(interface->ifname,
5894 tqueue->ifname, IFNAMSIZ)) ||
5895 (interface->not && strncmp(interface->ifname,
5896 tqueue->ifname, IFNAMSIZ)))) {
5897 /* found ourself in queues */
5898 found++;
5899
5900 memcpy(&pa, a, sizeof(struct pf_altq));
5901
5902 if (pa.scheduler != ALTQT_NONE &&
5903 pa.scheduler != tqueue->scheduler) {
5904 yyerror("exactly one scheduler type "
5905 "per interface allowed");
5906 return (1);
5907 }
5908 pa.scheduler = tqueue->scheduler;
5909
5910 /* scheduler dependent error checking */
5911 switch (pa.scheduler) {
5912 case ALTQT_PRIQ:
5913 if (nqueues != NULL) {
5914 yyerror("priq queues cannot "
5915 "have child queues");
5916 return (1);
5917 }
5918 if (bwspec.bw_absolute > 0 ||
5919 bwspec.bw_percent < 100) {
5920 yyerror("priq doesn't take "
5921 "bandwidth");
5922 return (1);
5923 }
5924 break;
5925 default:
5926 break;
5927 }
5928
5929 if (strlcpy(pa.ifname, tqueue->ifname,
5930 sizeof(pa.ifname)) >= sizeof(pa.ifname))
5931 errx(1, "%s: strlcpy", __func__);
5932 if (strlcpy(pa.parent, tqueue->parent,
5933 sizeof(pa.parent)) >= sizeof(pa.parent))
5934 errx(1, "%s: strlcpy", __func__);
5935
5936 if (eval_pfqueue(pf, &pa, &bwspec, opts))
5937 errs++;
5938 else
5939 if (pfctl_add_altq(pf, &pa))
5940 errs++;
5941
5942 for (nq = nqueues; nq != NULL; nq = nq->next) {
5943 if (!strcmp(a->qname, nq->queue)) {
5944 yyerror("queue cannot have "
5945 "itself as child");
5946 errs++;
5947 continue;
5948 }
5949 n = calloc(1,
5950 sizeof(struct node_queue));
5951 if (n == NULL)
5952 err(1, "%s: calloc", __func__);
5953 if (strlcpy(n->parent, a->qname,
5954 sizeof(n->parent)) >=
5955 sizeof(n->parent))
5956 errx(1, "%s strlcpy", __func__);
5957 if (strlcpy(n->queue, nq->queue,
5958 sizeof(n->queue)) >=
5959 sizeof(n->queue))
5960 errx(1, "%s strlcpy", __func__);
5961 if (strlcpy(n->ifname, tqueue->ifname,
5962 sizeof(n->ifname)) >=
5963 sizeof(n->ifname))
5964 errx(1, "%s strlcpy", __func__);
5965 n->scheduler = tqueue->scheduler;
5966 n->next = NULL;
5967 n->tail = n;
5968 if (queues == NULL)
5969 queues = n;
5970 else {
5971 queues->tail->next = n;
5972 queues->tail = n;
5973 }
5974 }
5975 if ((pf->opts & PF_OPT_VERBOSE) && (
5976 (found == 1 && interface->ifname[0] == 0) ||
5977 (found > 0 && interface->ifname[0] != 0))) {
5978 print_queue(&pf->paltq->altq, 0,
5979 &bwspec, interface->ifname[0] != 0,
5980 opts);
5981 if (nqueues && nqueues->tail) {
5982 printf("{ ");
5983 LOOP_THROUGH(struct node_queue,
5984 queue, nqueues,
5985 printf("%s ",
5986 queue->queue);
5987 );
5988 printf("}");
5989 }
5990 printf("\n");
5991 }
5992 }
5993 );
5994 );
5995
5996 FREE_LIST(struct node_queue, nqueues);
5997 FREE_LIST(struct node_if, interfaces);
5998
5999 if (!found) {
6000 yyerror("queue %s has no parent", a->qname);
6001 errs++;
6002 }
6003
6004 if (errs)
6005 return (1);
6006 else
6007 return (0);
6008 }
6009
6010 static int
pf_af_to_proto(sa_family_t af)6011 pf_af_to_proto(sa_family_t af)
6012 {
6013 if (af == AF_INET)
6014 return (ETHERTYPE_IP);
6015 if (af == AF_INET6)
6016 return (ETHERTYPE_IPV6);
6017
6018 return (0);
6019 }
6020
6021 void
expand_eth_rule(struct pfctl_eth_rule * r,struct node_if * interfaces,struct node_etherproto * protos,struct node_mac * srcs,struct node_mac * dsts,struct node_host * ipsrcs,struct node_host * ipdsts,const char * bridge_to,const char * anchor_call)6022 expand_eth_rule(struct pfctl_eth_rule *r,
6023 struct node_if *interfaces, struct node_etherproto *protos,
6024 struct node_mac *srcs, struct node_mac *dsts,
6025 struct node_host *ipsrcs, struct node_host *ipdsts,
6026 const char *bridge_to, const char *anchor_call)
6027 {
6028 char tagname[PF_TAG_NAME_SIZE];
6029 char match_tagname[PF_TAG_NAME_SIZE];
6030 char qname[PF_QNAME_SIZE];
6031
6032 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
6033 errx(1, "%s: tagname", __func__);
6034 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
6035 sizeof(match_tagname))
6036 errx(1, "%s: match_tagname", __func__);
6037 if (strlcpy(qname, r->qname, sizeof(qname)) >= sizeof(qname))
6038 errx(1, "%s: qname", __func__);
6039
6040 LOOP_THROUGH(struct node_if, interface, interfaces,
6041 LOOP_THROUGH(struct node_etherproto, proto, protos,
6042 LOOP_THROUGH(struct node_mac, src, srcs,
6043 LOOP_THROUGH(struct node_mac, dst, dsts,
6044 LOOP_THROUGH(struct node_host, ipsrc, ipsrcs,
6045 LOOP_THROUGH(struct node_host, ipdst, ipdsts,
6046 strlcpy(r->ifname, interface->ifname,
6047 sizeof(r->ifname));
6048 r->ifnot = interface->not;
6049 r->proto = proto->proto;
6050 if (!r->proto && ipsrc->af)
6051 r->proto = pf_af_to_proto(ipsrc->af);
6052 else if (!r->proto && ipdst->af)
6053 r->proto = pf_af_to_proto(ipdst->af);
6054 bcopy(src->mac, r->src.addr, ETHER_ADDR_LEN);
6055 bcopy(src->mask, r->src.mask, ETHER_ADDR_LEN);
6056 r->src.neg = src->neg;
6057 r->src.isset = src->isset;
6058 r->ipsrc.addr = ipsrc->addr;
6059 r->ipsrc.neg = ipsrc->not;
6060 r->ipdst.addr = ipdst->addr;
6061 r->ipdst.neg = ipdst->not;
6062 bcopy(dst->mac, r->dst.addr, ETHER_ADDR_LEN);
6063 bcopy(dst->mask, r->dst.mask, ETHER_ADDR_LEN);
6064 r->dst.neg = dst->neg;
6065 r->dst.isset = dst->isset;
6066 r->nr = pf->eastack[pf->asd]->match++;
6067
6068 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
6069 sizeof(r->tagname))
6070 errx(1, "%s: r->tagname", __func__);
6071 if (strlcpy(r->match_tagname, match_tagname,
6072 sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
6073 errx(1, "%s: r->match_tagname", __func__);
6074 if (strlcpy(r->qname, qname, sizeof(r->qname)) >= sizeof(r->qname))
6075 errx(1, "%s: r->qname", __func__);
6076
6077 if (bridge_to)
6078 strlcpy(r->bridge_to, bridge_to, sizeof(r->bridge_to));
6079
6080 pfctl_append_eth_rule(pf, r, anchor_call);
6081 ))))));
6082
6083 FREE_LIST(struct node_if, interfaces);
6084 FREE_LIST(struct node_etherproto, protos);
6085 FREE_LIST(struct node_mac, srcs);
6086 FREE_LIST(struct node_mac, dsts);
6087 FREE_LIST(struct node_host, ipsrcs);
6088 FREE_LIST(struct node_host, ipdsts);
6089 }
6090
6091 int
apply_rdr_ports(struct pfctl_rule * r,struct pfctl_pool * rpool,struct redirspec * rs)6092 apply_rdr_ports(struct pfctl_rule *r, struct pfctl_pool *rpool, struct redirspec *rs)
6093 {
6094 if (rs == NULL)
6095 return 0;
6096
6097 rpool->proxy_port[0] = ntohs(rs->rport.a);
6098
6099 if (!rs->rport.b && rs->rport.t) {
6100 rpool->proxy_port[1] = ntohs(rs->rport.a) +
6101 (ntohs(r->dst.port[1]) - ntohs(r->dst.port[0]));
6102 } else {
6103 if (validate_range(rs->rport.t, rs->rport.a,
6104 rs->rport.b)) {
6105 yyerror("invalid rdr-to port range");
6106 return (1);
6107 }
6108 r->rdr.proxy_port[1] = ntohs(rs->rport.b);
6109 }
6110
6111 if (rs->pool_opts.staticport) {
6112 yyerror("the 'static-port' option is only valid with nat rules");
6113 return 1;
6114 }
6115
6116 if (rs->pool_opts.mape.offset) {
6117 yyerror("the 'map-e-portset' option is only valid with nat rules");
6118 return 1;
6119 }
6120
6121 return 0;
6122 }
6123
6124 int
apply_nat_ports(struct pfctl_pool * rpool,struct redirspec * rs)6125 apply_nat_ports(struct pfctl_pool *rpool, struct redirspec *rs)
6126 {
6127 if (rs == NULL)
6128 return 0;
6129
6130 rpool->proxy_port[0] = ntohs(rs->rport.a);
6131 rpool->proxy_port[1] = ntohs(rs->rport.b);
6132 if (!rpool->proxy_port[0] && !rpool->proxy_port[1]) {
6133 rpool->proxy_port[0] = PF_NAT_PROXY_PORT_LOW;
6134 rpool->proxy_port[1] = PF_NAT_PROXY_PORT_HIGH;
6135 } else if (!rpool->proxy_port[1])
6136 rpool->proxy_port[1] = rpool->proxy_port[0];
6137
6138 if (rs->pool_opts.staticport) {
6139 if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW &&
6140 rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) {
6141 yyerror("the 'static-port' option can't"
6142 " be used when specifying a port"
6143 " range");
6144 return 1;
6145 }
6146 rpool->proxy_port[0] = 0;
6147 rpool->proxy_port[1] = 0;
6148 }
6149
6150 if (rs->pool_opts.mape.offset) {
6151 if (rs->pool_opts.staticport) {
6152 yyerror("the 'map-e-portset' option"
6153 " can't be used 'static-port'");
6154 return 1;
6155 }
6156 if (rpool->proxy_port[0] != PF_NAT_PROXY_PORT_LOW &&
6157 rpool->proxy_port[1] != PF_NAT_PROXY_PORT_HIGH) {
6158 yyerror("the 'map-e-portset' option"
6159 " can't be used when specifying"
6160 " a port range");
6161 return 1;
6162 }
6163 rpool->mape = rs->pool_opts.mape;
6164 }
6165
6166 return 0;
6167 }
6168
6169 int
apply_redirspec(struct pfctl_pool * rpool,struct redirspec * rs)6170 apply_redirspec(struct pfctl_pool *rpool, struct redirspec *rs)
6171 {
6172 struct node_host *h;
6173 struct pfctl_pooladdr *pa;
6174
6175 if (rs == NULL)
6176 return 0;
6177
6178 rpool->opts = rs->pool_opts.type;
6179
6180 if ((rpool->opts & PF_POOL_TYPEMASK) == PF_POOL_NONE &&
6181 (rs->host->next != NULL ||
6182 rs->host->addr.type == PF_ADDR_TABLE ||
6183 DYNIF_MULTIADDR(rs->host->addr)))
6184 rpool->opts = PF_POOL_ROUNDROBIN;
6185
6186 if (!PF_POOL_DYNTYPE(rpool->opts) &&
6187 (disallow_table(rs->host, "tables are not supported by pool type") ||
6188 disallow_alias(rs->host, "interface (%s) is not supported by pool type")))
6189 return 1;
6190
6191 if (rs->host->next != NULL &&
6192 ((rpool->opts & PF_POOL_TYPEMASK) != PF_POOL_ROUNDROBIN)) {
6193 yyerror("r.route.opts must be PF_POOL_ROUNDROBIN");
6194 return 1;
6195 }
6196
6197 if (rs->host->next != NULL) {
6198 if ((rpool->opts & PF_POOL_TYPEMASK) !=
6199 PF_POOL_ROUNDROBIN) {
6200 yyerror("only round-robin valid for multiple "
6201 "redirection addresses");
6202 return 1;
6203 }
6204 }
6205
6206 rpool->opts |= rs->pool_opts.opts;
6207
6208 if (rs->pool_opts.key != NULL)
6209 memcpy(&(rpool->key), rs->pool_opts.key,
6210 sizeof(struct pf_poolhashkey));
6211
6212 for (h = rs->host; h != NULL; h = h->next) {
6213 pa = calloc(1, sizeof(struct pfctl_pooladdr));
6214 if (pa == NULL)
6215 err(1, "%s: calloc", __func__);
6216 pa->addr = h->addr;
6217 pa->af = h->af;
6218 if (h->ifname != NULL) {
6219 if (strlcpy(pa->ifname, h->ifname,
6220 sizeof(pa->ifname)) >= sizeof(pa->ifname))
6221 errx(1, "%s: strlcpy", __func__);
6222 } else
6223 pa->ifname[0] = 0;
6224 TAILQ_INSERT_TAIL(&(rpool->list), pa, entries);
6225 }
6226
6227 return 0;
6228 }
6229
6230 int
check_binat_redirspec(struct node_host * src_host,struct pfctl_rule * r,sa_family_t af)6231 check_binat_redirspec(struct node_host *src_host, struct pfctl_rule *r,
6232 sa_family_t af)
6233 {
6234 struct pfctl_pooladdr *nat_pool = TAILQ_FIRST(&(r->nat.list));
6235 int error = 0;
6236
6237 /* XXX: FreeBSD allows syntax like "{ host1 host2 }" for redirection
6238 * pools but does not covert them to tables automatically, because
6239 * syntax "{ (iface1 host1), (iface2 iface2) }" is allowed for route-to
6240 * redirection. Add a FreeBSD-specific guard against using multiple
6241 * hosts for source and redirection.
6242 */
6243 if (src_host->next) {
6244 yyerror("invalid use of table as the source address "
6245 "of a binat-to rule");
6246 error++;
6247 }
6248 if (TAILQ_NEXT(nat_pool, entries)) {
6249 yyerror ("tables cannot be used as the redirect "
6250 "address of a binat-to rule");
6251 error++;
6252 }
6253
6254 if (disallow_table(src_host, "invalid use of table "
6255 "<%s> as the source address of a binat-to rule") ||
6256 disallow_alias(src_host, "invalid use of interface "
6257 "(%s) as the source address of a binat-to rule")) {
6258 error++;
6259 } else if ((r->src.addr.type != PF_ADDR_ADDRMASK &&
6260 r->src.addr.type != PF_ADDR_DYNIFTL) ||
6261 (nat_pool->addr.type != PF_ADDR_ADDRMASK &&
6262 nat_pool->addr.type != PF_ADDR_DYNIFTL)) {
6263 yyerror("binat-to requires a specified "
6264 "source and redirect address");
6265 error++;
6266 }
6267 if (DYNIF_MULTIADDR(r->src.addr) ||
6268 DYNIF_MULTIADDR(nat_pool->addr)) {
6269 yyerror ("dynamic interfaces must be "
6270 "used with:0 in a binat-to rule");
6271 error++;
6272 }
6273 if (PF_AZERO(&r->src.addr.v.a.mask, af) ||
6274 PF_AZERO(&(nat_pool->addr.v.a.mask), af)) {
6275 yyerror ("source and redir addresess must have "
6276 "a matching network mask in binat-rule");
6277 error++;
6278 }
6279 if (nat_pool->addr.type == PF_ADDR_TABLE) {
6280 yyerror ("tables cannot be used as the redirect "
6281 "address of a binat-to rule");
6282 error++;
6283 }
6284 if (r->direction != PF_INOUT) {
6285 yyerror("binat-to cannot be specified "
6286 "with a direction");
6287 error++;
6288 }
6289
6290 /* first specify outbound NAT rule */
6291 r->direction = PF_OUT;
6292
6293 return (error);
6294 }
6295
6296 void
add_binat_rdr_rule(struct pfctl_rule * binat_rule,struct redirspec * binat_nat_redirspec,struct node_host * binat_src_host,struct pfctl_rule * rdr_rule,struct redirspec ** rdr_redirspec,struct node_host ** rdr_dst_host)6297 add_binat_rdr_rule(
6298 struct pfctl_rule *binat_rule,
6299 struct redirspec *binat_nat_redirspec, struct node_host *binat_src_host,
6300 struct pfctl_rule *rdr_rule, struct redirspec **rdr_redirspec,
6301 struct node_host **rdr_dst_host)
6302 {
6303 struct node_host *rdr_src_host;
6304
6305 /*
6306 * We're copying the whole rule, but we must re-init redir pools.
6307 * FreeBSD uses lists of pfctl_pooladdr, we can't just overwrite them.
6308 */
6309 bcopy(binat_rule, rdr_rule, sizeof(struct pfctl_rule));
6310 TAILQ_INIT(&(rdr_rule->rdr.list));
6311 TAILQ_INIT(&(rdr_rule->nat.list));
6312
6313 /* now specify inbound rdr rule */
6314 rdr_rule->direction = PF_IN;
6315
6316 if ((rdr_src_host = calloc(1, sizeof(*rdr_src_host))) == NULL)
6317 err(1, "%s", __func__);
6318 bcopy(binat_src_host, rdr_src_host, sizeof(*rdr_src_host));
6319 rdr_src_host->ifname = NULL;
6320 rdr_src_host->next = NULL;
6321 rdr_src_host->tail = NULL;
6322
6323 if (((*rdr_dst_host) = calloc(1, sizeof(**rdr_dst_host))) == NULL)
6324 err(1, "%s", __func__);
6325 bcopy(&(binat_nat_redirspec->host->addr), &((*rdr_dst_host)->addr),
6326 sizeof((*rdr_dst_host)->addr));
6327 (*rdr_dst_host)->ifname = NULL;
6328 (*rdr_dst_host)->next = NULL;
6329 (*rdr_dst_host)->tail = NULL;
6330
6331 if (((*rdr_redirspec) = calloc(1, sizeof(**rdr_redirspec))) == NULL)
6332 err(1, "%s", __func__);
6333 bcopy(binat_nat_redirspec, (*rdr_redirspec), sizeof(**rdr_redirspec));
6334 (*rdr_redirspec)->pool_opts.staticport = 0;
6335 (*rdr_redirspec)->host = rdr_src_host;
6336 }
6337
6338 void
expand_rule(struct pfctl_rule * r,bool keeprule,struct node_if * interfaces,struct redirspec * nat,struct redirspec * rdr,struct redirspec * route,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_if * rcv,struct node_icmp * icmp_types,const char * anchor_call)6339 expand_rule(struct pfctl_rule *r, bool keeprule,
6340 struct node_if *interfaces, struct redirspec *nat,
6341 struct redirspec *rdr, struct redirspec *route,
6342 struct node_proto *protos,
6343 struct node_os *src_oses, struct node_host *src_hosts,
6344 struct node_port *src_ports, struct node_host *dst_hosts,
6345 struct node_port *dst_ports, struct node_uid *uids, struct node_gid *gids,
6346 struct node_if *rcv, struct node_icmp *icmp_types, const char *anchor_call)
6347 {
6348 sa_family_t af = r->af;
6349 int added = 0, error = 0;
6350 char ifname[IF_NAMESIZE];
6351 char label[PF_RULE_MAX_LABEL_COUNT][PF_RULE_LABEL_SIZE];
6352 char tagname[PF_TAG_NAME_SIZE];
6353 char match_tagname[PF_TAG_NAME_SIZE];
6354 struct node_host *osrch, *odsth;
6355 u_int8_t flags, flagset, keep_state;
6356
6357 memcpy(label, r->label, sizeof(r->label));
6358 assert(sizeof(r->label) == sizeof(label));
6359 if (strlcpy(tagname, r->tagname, sizeof(tagname)) >= sizeof(tagname))
6360 errx(1, "%s: strlcpy", __func__);
6361 if (strlcpy(match_tagname, r->match_tagname, sizeof(match_tagname)) >=
6362 sizeof(match_tagname))
6363 errx(1, "%s: strlcpy", __func__);
6364 flags = r->flags;
6365 flagset = r->flagset;
6366 keep_state = r->keep_state;
6367
6368 LOOP_THROUGH(struct node_if, interface, interfaces,
6369 LOOP_THROUGH(struct node_proto, proto, protos,
6370 LOOP_THROUGH(struct node_icmp, icmp_type, icmp_types,
6371 LOOP_THROUGH(struct node_host, src_host, src_hosts,
6372 LOOP_THROUGH(struct node_host, dst_host, dst_hosts,
6373 LOOP_THROUGH(struct node_port, src_port, src_ports,
6374 LOOP_THROUGH(struct node_port, dst_port, dst_ports,
6375 LOOP_THROUGH(struct node_os, src_os, src_oses,
6376 LOOP_THROUGH(struct node_uid, uid, uids,
6377 LOOP_THROUGH(struct node_gid, gid, gids,
6378
6379 r->af = af;
6380
6381 if (r->rule_flag & PFRULE_AFTO) {
6382 assert(nat != NULL);
6383 r->naf = nat->af;
6384 }
6385
6386 /* for link-local IPv6 address, interface must match up */
6387 if ((r->af && src_host->af && r->af != src_host->af) ||
6388 (r->af && dst_host->af && r->af != dst_host->af) ||
6389 (src_host->af && dst_host->af &&
6390 src_host->af != dst_host->af) ||
6391 (src_host->ifindex && dst_host->ifindex &&
6392 src_host->ifindex != dst_host->ifindex) ||
6393 (src_host->ifindex && *interface->ifname &&
6394 src_host->ifindex != ifa_nametoindex(interface->ifname)) ||
6395 (dst_host->ifindex && *interface->ifname &&
6396 dst_host->ifindex != ifa_nametoindex(interface->ifname)))
6397 continue;
6398 if (!r->af && src_host->af)
6399 r->af = src_host->af;
6400 else if (!r->af && dst_host->af)
6401 r->af = dst_host->af;
6402
6403 if (*interface->ifname)
6404 strlcpy(r->ifname, interface->ifname,
6405 sizeof(r->ifname));
6406 else if (ifa_indextoname(src_host->ifindex, ifname))
6407 strlcpy(r->ifname, ifname, sizeof(r->ifname));
6408 else if (ifa_indextoname(dst_host->ifindex, ifname))
6409 strlcpy(r->ifname, ifname, sizeof(r->ifname));
6410 else
6411 memset(r->ifname, '\0', sizeof(r->ifname));
6412
6413 memcpy(r->label, label, sizeof(r->label));
6414 if (strlcpy(r->tagname, tagname, sizeof(r->tagname)) >=
6415 sizeof(r->tagname))
6416 errx(1, "%s: strlcpy", __func__);
6417 if (strlcpy(r->match_tagname, match_tagname,
6418 sizeof(r->match_tagname)) >= sizeof(r->match_tagname))
6419 errx(1, "%s: strlcpy", __func__);
6420
6421 osrch = odsth = NULL;
6422 if (src_host->addr.type == PF_ADDR_DYNIFTL) {
6423 osrch = src_host;
6424 if ((src_host = gen_dynnode(src_host, r->af)) == NULL)
6425 err(1, "%s: calloc", __func__);
6426 }
6427 if (dst_host->addr.type == PF_ADDR_DYNIFTL) {
6428 odsth = dst_host;
6429 if ((dst_host = gen_dynnode(dst_host, r->af)) == NULL)
6430 err(1, "%s: calloc", __func__);
6431 }
6432
6433 error += check_netmask(src_host, r->af);
6434 error += check_netmask(dst_host, r->af);
6435
6436 r->ifnot = interface->not;
6437 r->proto = proto->proto;
6438 r->src.addr = src_host->addr;
6439 r->src.neg = src_host->not;
6440 r->src.port[0] = src_port->port[0];
6441 r->src.port[1] = src_port->port[1];
6442 r->src.port_op = src_port->op;
6443 r->dst.addr = dst_host->addr;
6444 r->dst.neg = dst_host->not;
6445 r->dst.port[0] = dst_port->port[0];
6446 r->dst.port[1] = dst_port->port[1];
6447 r->dst.port_op = dst_port->op;
6448 r->uid.op = uid->op;
6449 r->uid.uid[0] = uid->uid[0];
6450 r->uid.uid[1] = uid->uid[1];
6451 r->gid.op = gid->op;
6452 r->gid.gid[0] = gid->gid[0];
6453 r->gid.gid[1] = gid->gid[1];
6454 if (rcv) {
6455 strlcpy(r->rcv_ifname, rcv->ifname,
6456 sizeof(r->rcv_ifname));
6457 r->rcvifnot = rcv->not;
6458 }
6459 r->type = icmp_type->type;
6460 r->code = icmp_type->code;
6461
6462 if ((keep_state == PF_STATE_MODULATE ||
6463 keep_state == PF_STATE_SYNPROXY) &&
6464 r->proto && r->proto != IPPROTO_TCP)
6465 r->keep_state = PF_STATE_NORMAL;
6466 else
6467 r->keep_state = keep_state;
6468
6469 if (r->proto && r->proto != IPPROTO_TCP) {
6470 r->flags = 0;
6471 r->flagset = 0;
6472 } else {
6473 r->flags = flags;
6474 r->flagset = flagset;
6475 }
6476 if (icmp_type->proto && r->proto != icmp_type->proto) {
6477 yyerror("icmp-type mismatch");
6478 error++;
6479 }
6480
6481 if (src_os && src_os->os) {
6482 r->os_fingerprint = pfctl_get_fingerprint(src_os->os);
6483 if ((pf->opts & PF_OPT_VERBOSE2) &&
6484 r->os_fingerprint == PF_OSFP_NOMATCH)
6485 fprintf(stderr,
6486 "warning: unknown '%s' OS fingerprint\n",
6487 src_os->os);
6488 } else {
6489 r->os_fingerprint = PF_OSFP_ANY;
6490 }
6491
6492 if (r->action == PF_RDR) {
6493 /* Pre-FreeBSD 15 "rdr" rule */
6494 error += apply_rdr_ports(r, &(r->rdr), rdr);
6495 error += apply_redirspec(&(r->rdr), rdr);
6496 } else if (r->action == PF_NAT) {
6497 /* Pre-FreeBSD 15 "nat" rule */
6498 error += apply_nat_ports(&(r->rdr), rdr);
6499 error += apply_redirspec(&(r->rdr), rdr);
6500 } else {
6501 /* Modern rule with optional NAT, BINAT, RDR or ROUTE*/
6502 error += apply_redirspec(&(r->route), route);
6503
6504 error += apply_nat_ports(&(r->nat), nat);
6505 error += apply_redirspec(&(r->nat), nat);
6506 error += apply_rdr_ports(r, &(r->rdr), rdr);
6507 error += apply_redirspec(&(r->rdr), rdr);
6508
6509 if (nat && nat->binat)
6510 error += check_binat_redirspec(src_host, r, af);
6511 }
6512
6513 if (rule_consistent(r, anchor_call[0]) < 0 || error)
6514 yyerror("skipping rule due to errors");
6515 else {
6516 r->nr = pf->astack[pf->asd]->match++;
6517 pfctl_append_rule(pf, r, anchor_call);
6518 added++;
6519 }
6520
6521 /* Generate binat's matching inbound rule */
6522 if (!error && nat && nat->binat) {
6523 struct pfctl_rule rdr_rule;
6524 struct redirspec *rdr_redirspec;
6525 struct node_host *rdr_dst_host;
6526
6527 add_binat_rdr_rule(
6528 r, nat, src_hosts,
6529 &rdr_rule, &rdr_redirspec, &rdr_dst_host);
6530
6531 expand_rule(&rdr_rule, true, interface, NULL, rdr_redirspec,
6532 NULL, proto, src_os, dst_host, dst_port,
6533 rdr_dst_host, src_port, uid, gid, rcv, icmp_type,
6534 "");
6535 }
6536
6537 if (osrch && src_host->addr.type == PF_ADDR_DYNIFTL) {
6538 free(src_host);
6539 src_host = osrch;
6540 }
6541 if (odsth && dst_host->addr.type == PF_ADDR_DYNIFTL) {
6542 free(dst_host);
6543 dst_host = odsth;
6544 }
6545
6546 ))))))))));
6547
6548 if (!keeprule) {
6549 FREE_LIST(struct node_if, interfaces);
6550 FREE_LIST(struct node_proto, protos);
6551 FREE_LIST(struct node_host, src_hosts);
6552 FREE_LIST(struct node_port, src_ports);
6553 FREE_LIST(struct node_os, src_oses);
6554 FREE_LIST(struct node_host, dst_hosts);
6555 FREE_LIST(struct node_port, dst_ports);
6556 FREE_LIST(struct node_uid, uids);
6557 FREE_LIST(struct node_gid, gids);
6558 FREE_LIST(struct node_icmp, icmp_types);
6559 if (nat) {
6560 FREE_LIST(struct node_host, nat->host);
6561 free(nat);
6562 }
6563 if (rdr) {
6564 FREE_LIST(struct node_host, rdr->host);
6565 free(rdr);
6566 }
6567 if (route) {
6568 FREE_LIST(struct node_host, route->host);
6569 free(route);
6570 }
6571 }
6572
6573 if (!added)
6574 yyerror("rule expands to no valid combination");
6575 }
6576
6577 int
expand_skip_interface(struct node_if * interfaces)6578 expand_skip_interface(struct node_if *interfaces)
6579 {
6580 int errs = 0;
6581
6582 if (!interfaces || (!interfaces->next && !interfaces->not &&
6583 !strcmp(interfaces->ifname, "none"))) {
6584 if (pf->opts & PF_OPT_VERBOSE)
6585 printf("set skip on none\n");
6586 errs = pfctl_set_interface_flags(pf, "", PFI_IFLAG_SKIP, 0);
6587 return (errs);
6588 }
6589
6590 if (pf->opts & PF_OPT_VERBOSE)
6591 printf("set skip on {");
6592 LOOP_THROUGH(struct node_if, interface, interfaces,
6593 if (pf->opts & PF_OPT_VERBOSE)
6594 printf(" %s", interface->ifname);
6595 if (interface->not) {
6596 yyerror("skip on ! <interface> is not supported");
6597 errs++;
6598 } else
6599 errs += pfctl_set_interface_flags(pf,
6600 interface->ifname, PFI_IFLAG_SKIP, 1);
6601 );
6602 if (pf->opts & PF_OPT_VERBOSE)
6603 printf(" }\n");
6604
6605 FREE_LIST(struct node_if, interfaces);
6606
6607 if (errs)
6608 return (1);
6609 else
6610 return (0);
6611 }
6612
6613 void
freehostlist(struct node_host * h)6614 freehostlist(struct node_host *h)
6615 {
6616 FREE_LIST(struct node_host, h);
6617 }
6618
6619 #undef FREE_LIST
6620 #undef LOOP_THROUGH
6621
6622 int
check_rulestate(int desired_state)6623 check_rulestate(int desired_state)
6624 {
6625 if (require_order && (rulestate > desired_state)) {
6626 yyerror("Rules must be in order: options, ethernet, "
6627 "normalization, queueing, translation, filtering");
6628 return (1);
6629 }
6630 rulestate = desired_state;
6631 return (0);
6632 }
6633
6634 int
kw_cmp(const void * k,const void * e)6635 kw_cmp(const void *k, const void *e)
6636 {
6637 return (strcmp(k, ((const struct keywords *)e)->k_name));
6638 }
6639
6640 int
lookup(char * s)6641 lookup(char *s)
6642 {
6643 /* this has to be sorted always */
6644 static const struct keywords keywords[] = {
6645 { "af-to", AFTO},
6646 { "all", ALL},
6647 { "allow-opts", ALLOWOPTS},
6648 { "allow-related", ALLOW_RELATED},
6649 { "altq", ALTQ},
6650 { "anchor", ANCHOR},
6651 { "antispoof", ANTISPOOF},
6652 { "any", ANY},
6653 { "bandwidth", BANDWIDTH},
6654 { "binat", BINAT},
6655 { "binat-anchor", BINATANCHOR},
6656 { "binat-to", BINATTO},
6657 { "bitmask", BITMASK},
6658 { "block", BLOCK},
6659 { "block-policy", BLOCKPOLICY},
6660 { "bridge-to", BRIDGE_TO},
6661 { "buckets", BUCKETS},
6662 { "cbq", CBQ},
6663 { "code", CODE},
6664 { "codelq", CODEL},
6665 { "debug", DEBUG},
6666 { "divert-reply", DIVERTREPLY},
6667 { "divert-to", DIVERTTO},
6668 { "dnpipe", DNPIPE},
6669 { "dnqueue", DNQUEUE},
6670 { "drop", DROP},
6671 { "dup-to", DUPTO},
6672 { "endpoint-independent", ENDPI},
6673 { "ether", ETHER},
6674 { "fail-policy", FAILPOLICY},
6675 { "fairq", FAIRQ},
6676 { "fastroute", FASTROUTE},
6677 { "file", FILENAME},
6678 { "fingerprints", FINGERPRINTS},
6679 { "flags", FLAGS},
6680 { "floating", FLOATING},
6681 { "flush", FLUSH},
6682 { "for", FOR},
6683 { "fragment", FRAGMENT},
6684 { "from", FROM},
6685 { "global", GLOBAL},
6686 { "group", GROUP},
6687 { "hfsc", HFSC},
6688 { "hogs", HOGS},
6689 { "hostid", HOSTID},
6690 { "icmp-type", ICMPTYPE},
6691 { "icmp6-type", ICMP6TYPE},
6692 { "if-bound", IFBOUND},
6693 { "in", IN},
6694 { "include", INCLUDE},
6695 { "inet", INET},
6696 { "inet6", INET6},
6697 { "interval", INTERVAL},
6698 { "keep", KEEP},
6699 { "keepcounters", KEEPCOUNTERS},
6700 { "l3", L3},
6701 { "label", LABEL},
6702 { "limit", LIMIT},
6703 { "linkshare", LINKSHARE},
6704 { "load", LOAD},
6705 { "log", LOG},
6706 { "loginterface", LOGINTERFACE},
6707 { "map-e-portset", MAPEPORTSET},
6708 { "match", MATCH},
6709 { "matches", MATCHES},
6710 { "max", MAXIMUM},
6711 { "max-mss", MAXMSS},
6712 { "max-pkt-rate", MAXPKTRATE},
6713 { "max-pkt-size", MAXPKTSIZE},
6714 { "max-src-conn", MAXSRCCONN},
6715 { "max-src-conn-rate", MAXSRCCONNRATE},
6716 { "max-src-nodes", MAXSRCNODES},
6717 { "max-src-states", MAXSRCSTATES},
6718 { "min-ttl", MINTTL},
6719 { "modulate", MODULATE},
6720 { "nat", NAT},
6721 { "nat-anchor", NATANCHOR},
6722 { "nat-to", NATTO},
6723 { "no", NO},
6724 { "no-df", NODF},
6725 { "no-route", NOROUTE},
6726 { "no-sync", NOSYNC},
6727 { "on", ON},
6728 { "optimization", OPTIMIZATION},
6729 { "os", OS},
6730 { "out", OUT},
6731 { "overload", OVERLOAD},
6732 { "pass", PASS},
6733 { "pflow", PFLOW},
6734 { "port", PORT},
6735 { "prefer-ipv6-nexthop", IPV6NH},
6736 { "prio", PRIO},
6737 { "priority", PRIORITY},
6738 { "priq", PRIQ},
6739 { "probability", PROBABILITY},
6740 { "proto", PROTO},
6741 { "qlimit", QLIMIT},
6742 { "queue", QUEUE},
6743 { "quick", QUICK},
6744 { "random", RANDOM},
6745 { "random-id", RANDOMID},
6746 { "rdr", RDR},
6747 { "rdr-anchor", RDRANCHOR},
6748 { "rdr-to", RDRTO},
6749 { "realtime", REALTIME},
6750 { "reassemble", REASSEMBLE},
6751 { "received-on", RECEIVEDON},
6752 { "reply-to", REPLYTO},
6753 { "require-order", REQUIREORDER},
6754 { "return", RETURN},
6755 { "return-icmp", RETURNICMP},
6756 { "return-icmp6", RETURNICMP6},
6757 { "return-rst", RETURNRST},
6758 { "ridentifier", RIDENTIFIER},
6759 { "round-robin", ROUNDROBIN},
6760 { "route", ROUTE},
6761 { "route-to", ROUTETO},
6762 { "rtable", RTABLE},
6763 { "rule", RULE},
6764 { "ruleset-optimization", RULESET_OPTIMIZATION},
6765 { "scrub", SCRUB},
6766 { "set", SET},
6767 { "set-tos", SETTOS},
6768 { "skip", SKIP},
6769 { "sloppy", SLOPPY},
6770 { "source-hash", SOURCEHASH},
6771 { "source-track", SOURCETRACK},
6772 { "state", STATE},
6773 { "state-defaults", STATEDEFAULTS},
6774 { "state-policy", STATEPOLICY},
6775 { "static-port", STATICPORT},
6776 { "sticky-address", STICKYADDRESS},
6777 { "syncookies", SYNCOOKIES},
6778 { "synproxy", SYNPROXY},
6779 { "table", TABLE},
6780 { "tag", TAG},
6781 { "tagged", TAGGED},
6782 { "target", TARGET},
6783 { "tbrsize", TBRSIZE},
6784 { "timeout", TIMEOUT},
6785 { "to", TO},
6786 { "tos", TOS},
6787 { "ttl", TTL},
6788 { "upperlimit", UPPERLIMIT},
6789 { "urpf-failed", URPFFAILED},
6790 { "user", USER},
6791 };
6792 const struct keywords *p;
6793
6794 p = bsearch(s, keywords, sizeof(keywords)/sizeof(keywords[0]),
6795 sizeof(keywords[0]), kw_cmp);
6796
6797 if (p) {
6798 if (debug > 1)
6799 fprintf(stderr, "%s: %d\n", s, p->k_val);
6800 return (p->k_val);
6801 } else {
6802 if (debug > 1)
6803 fprintf(stderr, "string: %s\n", s);
6804 return (STRING);
6805 }
6806 }
6807
6808 #define START_EXPAND 1
6809 #define DONE_EXPAND 2
6810
6811 static int expanding;
6812
6813 int
igetc(void)6814 igetc(void)
6815 {
6816 int c;
6817 while (1) {
6818 if (file->ungetpos > 0)
6819 c = file->ungetbuf[--file->ungetpos];
6820 else
6821 c = getc(file->stream);
6822 if (c == START_EXPAND)
6823 expanding = 1;
6824 else if (c == DONE_EXPAND)
6825 expanding = 0;
6826 else
6827 break;
6828 }
6829 return (c);
6830 }
6831
6832 int
lgetc(int quotec)6833 lgetc(int quotec)
6834 {
6835 int c, next;
6836
6837 if (quotec) {
6838 if ((c = igetc()) == EOF) {
6839 yyerror("reached end of file while parsing quoted string");
6840 if (file == topfile || popfile() == EOF)
6841 return (EOF);
6842 return (quotec);
6843 }
6844 return (c);
6845 }
6846
6847 while ((c = igetc()) == '\\') {
6848 next = igetc();
6849 if (next != '\n') {
6850 c = next;
6851 break;
6852 }
6853 yylval.lineno = file->lineno;
6854 file->lineno++;
6855 }
6856
6857 if (c == EOF) {
6858 /*
6859 * Fake EOL when hit EOF for the first time. This gets line
6860 * count right if last line in included file is syntactically
6861 * invalid and has no newline.
6862 */
6863 if (file->eof_reached == 0) {
6864 file->eof_reached = 1;
6865 return ('\n');
6866 }
6867 while (c == EOF) {
6868 if (file == topfile || popfile() == EOF)
6869 return (EOF);
6870 c = igetc();
6871 }
6872 }
6873 return (c);
6874 }
6875
6876 void
lungetc(int c)6877 lungetc(int c)
6878 {
6879 if (c == EOF)
6880 return;
6881 if (file->ungetpos >= file->ungetsize) {
6882 void *p = reallocarray(file->ungetbuf, file->ungetsize, 2);
6883 if (p == NULL)
6884 err(1, "%s", __func__);
6885 file->ungetbuf = p;
6886 file->ungetsize *= 2;
6887 }
6888 file->ungetbuf[file->ungetpos++] = c;
6889 }
6890
6891 int
findeol(void)6892 findeol(void)
6893 {
6894 int c;
6895
6896 /* skip to either EOF or the first real EOL */
6897 while (1) {
6898 c = lgetc(0);
6899 if (c == '\n') {
6900 file->lineno++;
6901 break;
6902 }
6903 if (c == EOF)
6904 break;
6905 }
6906 return (ERROR);
6907 }
6908
6909 int
yylex(void)6910 yylex(void)
6911 {
6912 char buf[8096];
6913 char *p, *val;
6914 int quotec, next, c;
6915 int token;
6916
6917 top:
6918 p = buf;
6919 while ((c = lgetc(0)) == ' ' || c == '\t')
6920 ; /* nothing */
6921
6922 yylval.lineno = file->lineno;
6923 if (c == '#')
6924 while ((c = lgetc(0)) != '\n' && c != EOF)
6925 ; /* nothing */
6926 if (c == '$' && !expanding) {
6927 while (1) {
6928 if ((c = lgetc(0)) == EOF)
6929 return (0);
6930
6931 if (p + 1 >= buf + sizeof(buf) - 1) {
6932 yyerror("string too long");
6933 return (findeol());
6934 }
6935 if (isalnum(c) || c == '_') {
6936 *p++ = (char)c;
6937 continue;
6938 }
6939 *p = '\0';
6940 lungetc(c);
6941 break;
6942 }
6943 val = symget(buf);
6944 if (val == NULL) {
6945 yyerror("macro '%s' not defined", buf);
6946 return (findeol());
6947 }
6948 p = val + strlen(val) - 1;
6949 lungetc(DONE_EXPAND);
6950 while (p >= val) {
6951 lungetc(*p);
6952 p--;
6953 }
6954 lungetc(START_EXPAND);
6955 goto top;
6956 }
6957
6958 switch (c) {
6959 case '\'':
6960 case '"':
6961 quotec = c;
6962 while (1) {
6963 if ((c = lgetc(quotec)) == EOF)
6964 return (0);
6965 if (c == '\n') {
6966 file->lineno++;
6967 continue;
6968 } else if (c == '\\') {
6969 if ((next = lgetc(quotec)) == EOF)
6970 return (0);
6971 if (next == quotec || next == ' ' ||
6972 next == '\t')
6973 c = next;
6974 else if (next == '\n') {
6975 file->lineno++;
6976 continue;
6977 }
6978 else
6979 lungetc(next);
6980 } else if (c == quotec) {
6981 *p = '\0';
6982 break;
6983 } else if (c == '\0') {
6984 yyerror("syntax error");
6985 return (findeol());
6986 }
6987 if (p + 1 >= buf + sizeof(buf) - 1) {
6988 yyerror("string too long");
6989 return (findeol());
6990 }
6991 *p++ = (char)c;
6992 }
6993 yylval.v.string = strdup(buf);
6994 if (yylval.v.string == NULL)
6995 err(1, "%s: strdup", __func__);
6996 return (STRING);
6997 case '!':
6998 next = lgetc(0);
6999 if (next == '=')
7000 return (NE);
7001 lungetc(next);
7002 break;
7003 case '<':
7004 next = lgetc(0);
7005 if (next == '>') {
7006 yylval.v.i = PF_OP_XRG;
7007 return (PORTBINARY);
7008 } else if (next == '=')
7009 return (LE);
7010 lungetc(next);
7011 break;
7012 case '>':
7013 next = lgetc(0);
7014 if (next == '<') {
7015 yylval.v.i = PF_OP_IRG;
7016 return (PORTBINARY);
7017 } else if (next == '=')
7018 return (GE);
7019 lungetc(next);
7020 break;
7021 case '-':
7022 next = lgetc(0);
7023 if (next == '>')
7024 return (ARROW);
7025 lungetc(next);
7026 break;
7027 }
7028
7029 #define allowed_to_end_number(x) \
7030 (isspace(x) || x == ')' || x ==',' || x == '/' || x == '}' || x == '=')
7031
7032 if (c == '-' || isdigit(c)) {
7033 do {
7034 *p++ = c;
7035 if ((size_t)(p-buf) >= sizeof(buf)) {
7036 yyerror("string too long");
7037 return (findeol());
7038 }
7039 } while ((c = lgetc(0)) != EOF && isdigit(c));
7040 lungetc(c);
7041 if (p == buf + 1 && buf[0] == '-')
7042 goto nodigits;
7043 if (c == EOF || allowed_to_end_number(c)) {
7044 const char *errstr = NULL;
7045
7046 *p = '\0';
7047 yylval.v.number = strtonum(buf, LLONG_MIN,
7048 LLONG_MAX, &errstr);
7049 if (errstr) {
7050 yyerror("\"%s\" invalid number: %s",
7051 buf, errstr);
7052 return (findeol());
7053 }
7054 return (NUMBER);
7055 } else {
7056 nodigits:
7057 while (p > buf + 1)
7058 lungetc(*--p);
7059 c = *--p;
7060 if (c == '-')
7061 return (c);
7062 }
7063 }
7064
7065 #define allowed_in_string(x) \
7066 (isalnum(x) || (ispunct(x) && x != '(' && x != ')' && \
7067 x != '{' && x != '}' && x != '<' && x != '>' && \
7068 x != '!' && x != '=' && x != '/' && x != '#' && \
7069 x != ','))
7070
7071 if (isalnum(c) || c == ':' || c == '_') {
7072 do {
7073 *p++ = c;
7074 if ((size_t)(p-buf) >= sizeof(buf)) {
7075 yyerror("string too long");
7076 return (findeol());
7077 }
7078 } while ((c = lgetc(0)) != EOF && (allowed_in_string(c)));
7079 lungetc(c);
7080 *p = '\0';
7081 if ((token = lookup(buf)) == STRING)
7082 if ((yylval.v.string = strdup(buf)) == NULL)
7083 err(1, "%s: strdup", __func__);
7084 return (token);
7085 }
7086 if (c == '\n') {
7087 yylval.lineno = file->lineno;
7088 file->lineno++;
7089 }
7090 if (c == EOF)
7091 return (0);
7092 return (c);
7093 }
7094
7095 int
check_file_secrecy(int fd,const char * fname)7096 check_file_secrecy(int fd, const char *fname)
7097 {
7098 struct stat st;
7099
7100 if (fstat(fd, &st)) {
7101 warn("cannot stat %s", fname);
7102 return (-1);
7103 }
7104 if (st.st_uid != 0 && st.st_uid != getuid()) {
7105 warnx("%s: owner not root or current user", fname);
7106 return (-1);
7107 }
7108 if (st.st_mode & (S_IWGRP | S_IXGRP | S_IRWXO)) {
7109 warnx("%s: group writable or world read/writable", fname);
7110 return (-1);
7111 }
7112 return (0);
7113 }
7114
7115 struct file *
pushfile(const char * name,int secret)7116 pushfile(const char *name, int secret)
7117 {
7118 struct file *nfile;
7119
7120 if ((nfile = calloc(1, sizeof(struct file))) == NULL ||
7121 (nfile->name = strdup(name)) == NULL) {
7122 warn("%s", __func__);
7123 if (nfile)
7124 free(nfile);
7125 return (NULL);
7126 }
7127 if (TAILQ_FIRST(&files) == NULL && strcmp(nfile->name, "-") == 0) {
7128 nfile->stream = stdin;
7129 free(nfile->name);
7130 if ((nfile->name = strdup("stdin")) == NULL) {
7131 warn("%s", __func__);
7132 free(nfile);
7133 return (NULL);
7134 }
7135 } else if ((nfile->stream = pfctl_fopen(nfile->name, "r")) == NULL) {
7136 warn("%s: %s", __func__, nfile->name);
7137 free(nfile->name);
7138 free(nfile);
7139 return (NULL);
7140 } else if (secret &&
7141 check_file_secrecy(fileno(nfile->stream), nfile->name)) {
7142 fclose(nfile->stream);
7143 free(nfile->name);
7144 free(nfile);
7145 return (NULL);
7146 }
7147 nfile->lineno = TAILQ_EMPTY(&files) ? 1 : 0;
7148 nfile->ungetsize = 16;
7149 nfile->ungetbuf = malloc(nfile->ungetsize);
7150 if (nfile->ungetbuf == NULL) {
7151 warn("%s", __func__);
7152 fclose(nfile->stream);
7153 free(nfile->name);
7154 free(nfile);
7155 return (NULL);
7156 }
7157 TAILQ_INSERT_TAIL(&files, nfile, entry);
7158 return (nfile);
7159 }
7160
7161 int
popfile(void)7162 popfile(void)
7163 {
7164 struct file *prev;
7165
7166 if ((prev = TAILQ_PREV(file, files, entry)) != NULL)
7167 prev->errors += file->errors;
7168
7169 TAILQ_REMOVE(&files, file, entry);
7170 fclose(file->stream);
7171 free(file->name);
7172 free(file->ungetbuf);
7173 free(file);
7174 file = prev;
7175
7176 return (file ? 0 : EOF);
7177 }
7178
7179 int
parse_config(char * filename,struct pfctl * xpf)7180 parse_config(char *filename, struct pfctl *xpf)
7181 {
7182 int errors = 0;
7183 struct sym *sym;
7184
7185 pf = xpf;
7186 errors = 0;
7187 rulestate = PFCTL_STATE_NONE;
7188 returnicmpdefault = (ICMP_UNREACH << 8) | ICMP_UNREACH_PORT;
7189 returnicmp6default =
7190 (ICMP6_DST_UNREACH << 8) | ICMP6_DST_UNREACH_NOPORT;
7191 blockpolicy = PFRULE_DROP;
7192 failpolicy = PFRULE_DROP;
7193 require_order = 1;
7194
7195 if ((file = pushfile(filename, 0)) == NULL) {
7196 warn("cannot open the main config file!");
7197 return (-1);
7198 }
7199 topfile = file;
7200
7201 yyparse();
7202 errors = file->errors;
7203 popfile();
7204
7205 /* Free macros and check which have not been used. */
7206 while ((sym = TAILQ_FIRST(&symhead))) {
7207 if ((pf->opts & PF_OPT_VERBOSE2) && !sym->used)
7208 fprintf(stderr, "warning: macro '%s' not "
7209 "used\n", sym->nam);
7210 free(sym->nam);
7211 free(sym->val);
7212 TAILQ_REMOVE(&symhead, sym, entry);
7213 free(sym);
7214 }
7215
7216 return (errors ? -1 : 0);
7217 }
7218
7219 int
symset(const char * nam,const char * val,int persist)7220 symset(const char *nam, const char *val, int persist)
7221 {
7222 struct sym *sym;
7223
7224 TAILQ_FOREACH(sym, &symhead, entry) {
7225 if (strcmp(nam, sym->nam) == 0)
7226 break;
7227 }
7228
7229 if (sym != NULL) {
7230 if (sym->persist == 1)
7231 return (0);
7232 else {
7233 free(sym->nam);
7234 free(sym->val);
7235 TAILQ_REMOVE(&symhead, sym, entry);
7236 free(sym);
7237 }
7238 }
7239 if ((sym = calloc(1, sizeof(*sym))) == NULL)
7240 return (-1);
7241
7242 sym->nam = strdup(nam);
7243 if (sym->nam == NULL) {
7244 free(sym);
7245 return (-1);
7246 }
7247 sym->val = strdup(val);
7248 if (sym->val == NULL) {
7249 free(sym->nam);
7250 free(sym);
7251 return (-1);
7252 }
7253 sym->used = 0;
7254 sym->persist = persist;
7255 TAILQ_INSERT_TAIL(&symhead, sym, entry);
7256 return (0);
7257 }
7258
7259 int
pfctl_cmdline_symset(char * s)7260 pfctl_cmdline_symset(char *s)
7261 {
7262 char *sym, *val;
7263 int ret;
7264
7265 if ((val = strrchr(s, '=')) == NULL)
7266 return (-1);
7267
7268 sym = strndup(s, val - s);
7269 if (sym == NULL)
7270 err(1, "%s: malloc", __func__);
7271
7272 ret = symset(sym, val + 1, 1);
7273 free(sym);
7274
7275 return (ret);
7276 }
7277
7278 char *
symget(const char * nam)7279 symget(const char *nam)
7280 {
7281 struct sym *sym;
7282
7283 TAILQ_FOREACH(sym, &symhead, entry) {
7284 if (strcmp(nam, sym->nam) == 0) {
7285 sym->used = 1;
7286 return (sym->val);
7287 }
7288 }
7289 return (NULL);
7290 }
7291
7292 void
mv_rules(struct pfctl_ruleset * src,struct pfctl_ruleset * dst)7293 mv_rules(struct pfctl_ruleset *src, struct pfctl_ruleset *dst)
7294 {
7295 int i;
7296 struct pfctl_rule *r;
7297
7298 for (i = 0; i < PF_RULESET_MAX; ++i) {
7299 TAILQ_FOREACH(r, src->rules[i].active.ptr, entries)
7300 dst->anchor->match++;
7301 TAILQ_CONCAT(dst->rules[i].active.ptr, src->rules[i].active.ptr, entries);
7302 src->anchor->match = 0;
7303 TAILQ_CONCAT(dst->rules[i].inactive.ptr, src->rules[i].inactive.ptr, entries);
7304 }
7305 }
7306
7307 void
mv_eth_rules(struct pfctl_eth_ruleset * src,struct pfctl_eth_ruleset * dst)7308 mv_eth_rules(struct pfctl_eth_ruleset *src, struct pfctl_eth_ruleset *dst)
7309 {
7310 struct pfctl_eth_rule *r;
7311
7312 while ((r = TAILQ_FIRST(&src->rules)) != NULL) {
7313 TAILQ_REMOVE(&src->rules, r, entries);
7314 TAILQ_INSERT_TAIL(&dst->rules, r, entries);
7315 dst->anchor->match++;
7316 }
7317 src->anchor->match = 0;
7318 }
7319
7320 void
mv_tables(struct pfctl * pf,struct pfr_ktablehead * ktables,struct pfctl_anchor * a,struct pfctl_anchor * alast)7321 mv_tables(struct pfctl *pf, struct pfr_ktablehead *ktables,
7322 struct pfctl_anchor *a, struct pfctl_anchor *alast)
7323 {
7324 struct pfr_ktable *kt, *kt_safe;
7325 char new_path[PF_ANCHOR_MAXPATH];
7326 char *path_cut;
7327 int sz;
7328 struct pfr_uktable *ukt;
7329 SLIST_HEAD(, pfr_uktable) ukt_list;
7330
7331 /*
7332 * Here we need to rename anchor path from temporal names such as
7333 * _1/_2/foo to _1/bar/foo etc.
7334 *
7335 * This also means we need to remove and insert table to ktables
7336 * tree as anchor path is being updated.
7337 */
7338 SLIST_INIT(&ukt_list);
7339 DBGPRINT("%s [ %s ] (%s)\n", __func__, a->path, alast->path);
7340 RB_FOREACH_SAFE(kt, pfr_ktablehead, ktables, kt_safe) {
7341 path_cut = strstr(kt->pfrkt_anchor, alast->path);
7342 if (path_cut != NULL) {
7343 path_cut += strlen(alast->path);
7344 if (*path_cut)
7345 sz = snprintf(new_path, sizeof (new_path),
7346 "%s%s", a->path, path_cut);
7347 else
7348 sz = snprintf(new_path, sizeof (new_path),
7349 "%s", a->path);
7350 if (sz >= sizeof (new_path))
7351 errx(1, "new path is too long for %s@%s\n",
7352 kt->pfrkt_name, kt->pfrkt_anchor);
7353
7354 DBGPRINT("%s %s@%s -> %s@%s\n", __func__,
7355 kt->pfrkt_name, kt->pfrkt_anchor,
7356 kt->pfrkt_name, new_path);
7357 RB_REMOVE(pfr_ktablehead, ktables, kt);
7358 strlcpy(kt->pfrkt_anchor, new_path,
7359 sizeof(kt->pfrkt_anchor));
7360 SLIST_INSERT_HEAD(&ukt_list, (struct pfr_uktable *)kt,
7361 pfrukt_entry);
7362 }
7363 }
7364
7365 while ((ukt = SLIST_FIRST(&ukt_list)) != NULL) {
7366 SLIST_REMOVE_HEAD(&ukt_list, pfrukt_entry);
7367 if (RB_INSERT(pfr_ktablehead, ktables,
7368 (struct pfr_ktable *)ukt) != NULL)
7369 errx(1, "%s@%s exists already\n",
7370 ukt->pfrukt_name,
7371 ukt->pfrukt_anchor);
7372 }
7373 }
7374
7375 void
decide_address_family(struct node_host * n,sa_family_t * af)7376 decide_address_family(struct node_host *n, sa_family_t *af)
7377 {
7378 if (*af != 0 || n == NULL)
7379 return;
7380 *af = n->af;
7381 while ((n = n->next) != NULL) {
7382 if (n->af != *af) {
7383 *af = 0;
7384 return;
7385 }
7386 }
7387 }
7388
7389 void
remove_invalid_hosts(struct node_host ** nh,sa_family_t * af)7390 remove_invalid_hosts(struct node_host **nh, sa_family_t *af)
7391 {
7392 struct node_host *n = *nh, *prev = NULL;
7393
7394 while (n != NULL) {
7395 if (*af && n->af && n->af != *af) {
7396 /* unlink and free n */
7397 struct node_host *next = n->next;
7398
7399 /* adjust tail pointer */
7400 if (n == (*nh)->tail)
7401 (*nh)->tail = prev;
7402 /* adjust previous node's next pointer */
7403 if (prev == NULL)
7404 *nh = next;
7405 else
7406 prev->next = next;
7407 /* free node */
7408 if (n->ifname != NULL)
7409 free(n->ifname);
7410 free(n);
7411 n = next;
7412 } else {
7413 if (n->af && !*af)
7414 *af = n->af;
7415 prev = n;
7416 n = n->next;
7417 }
7418 }
7419 }
7420
7421 int
invalid_redirect(struct node_host * nh,sa_family_t af)7422 invalid_redirect(struct node_host *nh, sa_family_t af)
7423 {
7424 if (!af) {
7425 struct node_host *n;
7426
7427 /* tables and dyniftl are ok without an address family */
7428 for (n = nh; n != NULL; n = n->next) {
7429 if (n->addr.type != PF_ADDR_TABLE &&
7430 n->addr.type != PF_ADDR_DYNIFTL) {
7431 yyerror("address family not given and "
7432 "translation address expands to multiple "
7433 "address families");
7434 return (1);
7435 }
7436 }
7437 }
7438 if (nh == NULL) {
7439 yyerror("no translation address with matching address family "
7440 "found.");
7441 return (1);
7442 }
7443 return (0);
7444 }
7445
7446 int
atoul(char * s,u_long * ulvalp)7447 atoul(char *s, u_long *ulvalp)
7448 {
7449 u_long ulval;
7450 char *ep;
7451
7452 errno = 0;
7453 ulval = strtoul(s, &ep, 0);
7454 if (s[0] == '\0' || *ep != '\0')
7455 return (-1);
7456 if (errno == ERANGE && ulval == ULONG_MAX)
7457 return (-1);
7458 *ulvalp = ulval;
7459 return (0);
7460 }
7461
7462 int
getservice(char * n)7463 getservice(char *n)
7464 {
7465 struct servent *s;
7466 u_long ulval;
7467
7468 if (atoul(n, &ulval) == 0) {
7469 if (ulval > 65535) {
7470 yyerror("illegal port value %lu", ulval);
7471 return (-1);
7472 }
7473 return (htons(ulval));
7474 } else {
7475 s = getservbyname(n, "tcp");
7476 if (s == NULL)
7477 s = getservbyname(n, "udp");
7478 if (s == NULL)
7479 s = getservbyname(n, "sctp");
7480 if (s == NULL) {
7481 yyerror("unknown port %s", n);
7482 return (-1);
7483 }
7484 return (s->s_port);
7485 }
7486 }
7487
7488 int
rule_label(struct pfctl_rule * r,char * s[PF_RULE_MAX_LABEL_COUNT])7489 rule_label(struct pfctl_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT])
7490 {
7491 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) {
7492 if (s[i] == NULL)
7493 return (0);
7494
7495 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >=
7496 sizeof(r->label[0])) {
7497 yyerror("rule label too long (max %d chars)",
7498 sizeof(r->label[0])-1);
7499 return (-1);
7500 }
7501 }
7502 return (0);
7503 }
7504
7505 int
eth_rule_label(struct pfctl_eth_rule * r,char * s[PF_RULE_MAX_LABEL_COUNT])7506 eth_rule_label(struct pfctl_eth_rule *r, char *s[PF_RULE_MAX_LABEL_COUNT])
7507 {
7508 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++) {
7509 if (s[i] == NULL)
7510 return (0);
7511
7512 if (strlcpy(r->label[i], s[i], sizeof(r->label[0])) >=
7513 sizeof(r->label[0])) {
7514 yyerror("rule label too long (max %d chars)",
7515 sizeof(r->label[0])-1);
7516 return (-1);
7517 }
7518 }
7519 return (0);
7520 }
7521
7522 u_int16_t
parseicmpspec(char * w,sa_family_t af)7523 parseicmpspec(char *w, sa_family_t af)
7524 {
7525 const struct icmpcodeent *p;
7526 u_long ulval;
7527 u_int8_t icmptype;
7528
7529 if (af == AF_INET)
7530 icmptype = returnicmpdefault >> 8;
7531 else
7532 icmptype = returnicmp6default >> 8;
7533
7534 if (atoul(w, &ulval) == -1) {
7535 if ((p = geticmpcodebyname(icmptype, w, af)) == NULL) {
7536 yyerror("unknown icmp code %s", w);
7537 return (0);
7538 }
7539 ulval = p->code;
7540 }
7541 if (ulval > 255) {
7542 yyerror("invalid icmp code %lu", ulval);
7543 return (0);
7544 }
7545 return (icmptype << 8 | ulval);
7546 }
7547
7548 int
parseport(char * port,struct range * r,int extensions)7549 parseport(char *port, struct range *r, int extensions)
7550 {
7551 char *p = strchr(port, ':');
7552
7553 if (p == NULL) {
7554 if ((r->a = getservice(port)) == -1)
7555 return (-1);
7556 r->b = 0;
7557 r->t = PF_OP_NONE;
7558 return (0);
7559 }
7560 if ((extensions & PPORT_STAR) && !strcmp(p+1, "*")) {
7561 *p = 0;
7562 if ((r->a = getservice(port)) == -1)
7563 return (-1);
7564 r->b = 0;
7565 r->t = PF_OP_IRG;
7566 return (0);
7567 }
7568 if ((extensions & PPORT_RANGE)) {
7569 *p++ = 0;
7570 if ((r->a = getservice(port)) == -1 ||
7571 (r->b = getservice(p)) == -1)
7572 return (-1);
7573 if (r->a == r->b) {
7574 r->b = 0;
7575 r->t = PF_OP_NONE;
7576 } else
7577 r->t = PF_OP_RRG;
7578 return (0);
7579 }
7580 return (-1);
7581 }
7582
7583 int
pfctl_load_anchors(int dev,struct pfctl * pf)7584 pfctl_load_anchors(int dev, struct pfctl *pf)
7585 {
7586 struct loadanchors *la;
7587
7588 TAILQ_FOREACH(la, &loadanchorshead, entries) {
7589 if (pf->opts & PF_OPT_VERBOSE)
7590 fprintf(stderr, "\nLoading anchor %s from %s\n",
7591 la->anchorname, la->filename);
7592 if (pfctl_rules(dev, la->filename, pf->opts, pf->optimize,
7593 la->anchorname, pf->trans) == -1)
7594 return (-1);
7595 }
7596
7597 return (0);
7598 }
7599
7600 int
kw_casecmp(const void * k,const void * e)7601 kw_casecmp(const void *k, const void *e)
7602 {
7603 return (strcasecmp(k, ((const struct keywords *)e)->k_name));
7604 }
7605
7606 int
map_tos(char * s,int * val)7607 map_tos(char *s, int *val)
7608 {
7609 /* DiffServ Codepoints and other TOS mappings */
7610 const struct keywords toswords[] = {
7611 { "af11", IPTOS_DSCP_AF11 },
7612 { "af12", IPTOS_DSCP_AF12 },
7613 { "af13", IPTOS_DSCP_AF13 },
7614 { "af21", IPTOS_DSCP_AF21 },
7615 { "af22", IPTOS_DSCP_AF22 },
7616 { "af23", IPTOS_DSCP_AF23 },
7617 { "af31", IPTOS_DSCP_AF31 },
7618 { "af32", IPTOS_DSCP_AF32 },
7619 { "af33", IPTOS_DSCP_AF33 },
7620 { "af41", IPTOS_DSCP_AF41 },
7621 { "af42", IPTOS_DSCP_AF42 },
7622 { "af43", IPTOS_DSCP_AF43 },
7623 { "critical", IPTOS_PREC_CRITIC_ECP },
7624 { "cs0", IPTOS_DSCP_CS0 },
7625 { "cs1", IPTOS_DSCP_CS1 },
7626 { "cs2", IPTOS_DSCP_CS2 },
7627 { "cs3", IPTOS_DSCP_CS3 },
7628 { "cs4", IPTOS_DSCP_CS4 },
7629 { "cs5", IPTOS_DSCP_CS5 },
7630 { "cs6", IPTOS_DSCP_CS6 },
7631 { "cs7", IPTOS_DSCP_CS7 },
7632 { "ef", IPTOS_DSCP_EF },
7633 { "inetcontrol", IPTOS_PREC_INTERNETCONTROL },
7634 { "lowdelay", IPTOS_LOWDELAY },
7635 { "netcontrol", IPTOS_PREC_NETCONTROL },
7636 { "reliability", IPTOS_RELIABILITY },
7637 { "throughput", IPTOS_THROUGHPUT },
7638 { "va", IPTOS_DSCP_VA }
7639 };
7640 const struct keywords *p;
7641
7642 p = bsearch(s, toswords, sizeof(toswords)/sizeof(toswords[0]),
7643 sizeof(toswords[0]), kw_casecmp);
7644
7645 if (p) {
7646 *val = p->k_val;
7647 return (1);
7648 }
7649 return (0);
7650 }
7651
7652 int
rt_tableid_max(void)7653 rt_tableid_max(void)
7654 {
7655 #ifdef __FreeBSD__
7656 int fibs;
7657 size_t l = sizeof(fibs);
7658
7659 if (sysctlbyname("net.fibs", &fibs, &l, NULL, 0) == -1)
7660 fibs = 16; /* XXX RT_MAXFIBS, at least limit it some. */
7661 /*
7662 * As the OpenBSD code only compares > and not >= we need to adjust
7663 * here given we only accept values of 0..n and want to avoid #ifdefs
7664 * in the grammar.
7665 */
7666 return (fibs - 1);
7667 #else
7668 return (RT_TABLEID_MAX);
7669 #endif
7670 }
7671
7672 struct node_mac*
node_mac_from_string(const char * str)7673 node_mac_from_string(const char *str)
7674 {
7675 struct node_mac *m;
7676
7677 m = calloc(1, sizeof(struct node_mac));
7678 if (m == NULL)
7679 err(1, "%s: calloc", __func__);
7680
7681 if (sscanf(str, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
7682 &m->mac[0], &m->mac[1], &m->mac[2], &m->mac[3], &m->mac[4],
7683 &m->mac[5]) != 6) {
7684 free(m);
7685 yyerror("invalid MAC address");
7686 return (NULL);
7687 }
7688
7689 memset(m->mask, 0xff, ETHER_ADDR_LEN);
7690 m->isset = true;
7691 m->next = NULL;
7692 m->tail = m;
7693
7694 return (m);
7695 }
7696
7697 struct node_mac*
node_mac_from_string_masklen(const char * str,int masklen)7698 node_mac_from_string_masklen(const char *str, int masklen)
7699 {
7700 struct node_mac *m;
7701
7702 if (masklen < 0 || masklen > (ETHER_ADDR_LEN * 8)) {
7703 yyerror("invalid MAC mask length");
7704 return (NULL);
7705 }
7706
7707 m = node_mac_from_string(str);
7708 if (m == NULL)
7709 return (NULL);
7710
7711 memset(m->mask, 0, ETHER_ADDR_LEN);
7712 for (int i = 0; i < masklen; i++)
7713 m->mask[i / 8] |= 1 << (i % 8);
7714
7715 return (m);
7716 }
7717
7718 struct node_mac*
node_mac_from_string_mask(const char * str,const char * mask)7719 node_mac_from_string_mask(const char *str, const char *mask)
7720 {
7721 struct node_mac *m;
7722
7723 m = node_mac_from_string(str);
7724 if (m == NULL)
7725 return (NULL);
7726
7727 if (sscanf(mask, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
7728 &m->mask[0], &m->mask[1], &m->mask[2], &m->mask[3], &m->mask[4],
7729 &m->mask[5]) != 6) {
7730 free(m);
7731 yyerror("invalid MAC mask");
7732 return (NULL);
7733 }
7734
7735 return (m);
7736 }
7737
7738 int
filteropts_to_rule(struct pfctl_rule * r,struct filter_opts * opts)7739 filteropts_to_rule(struct pfctl_rule *r, struct filter_opts *opts)
7740 {
7741 r->keep_state = opts->keep.action;
7742 r->pktrate.limit = opts->pktrate.limit;
7743 r->pktrate.seconds = opts->pktrate.seconds;
7744 r->prob = opts->prob;
7745 r->rtableid = opts->rtableid;
7746 r->ridentifier = opts->ridentifier;
7747 r->max_pkt_size = opts->max_pkt_size;
7748 r->tos = opts->tos;
7749
7750 if (opts->nodf)
7751 r->scrub_flags |= PFSTATE_NODF;
7752 if (opts->randomid)
7753 r->scrub_flags |= PFSTATE_RANDOMID;
7754 if (opts->minttl)
7755 r->min_ttl = opts->minttl;
7756 if (opts->max_mss)
7757 r->max_mss = opts->max_mss;
7758
7759 if (opts->tag)
7760 if (strlcpy(r->tagname, opts->tag,
7761 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
7762 yyerror("tag too long, max %u chars",
7763 PF_TAG_NAME_SIZE - 1);
7764 return (1);
7765 }
7766 if (opts->match_tag)
7767 if (strlcpy(r->match_tagname, opts->match_tag,
7768 PF_TAG_NAME_SIZE) >= PF_TAG_NAME_SIZE) {
7769 yyerror("tag too long, max %u chars",
7770 PF_TAG_NAME_SIZE - 1);
7771 return (1);
7772 }
7773 r->match_tag_not = opts->match_tag_not;
7774
7775 if (rule_label(r, opts->label))
7776 return (1);
7777 for (int i = 0; i < PF_RULE_MAX_LABEL_COUNT; i++)
7778 free(opts->label[i]);
7779
7780 if (opts->marker & FOM_AFTO)
7781 r->rule_flag |= PFRULE_AFTO;
7782 if (opts->marker & FOM_SCRUB_TCP)
7783 r->scrub_flags |= PFSTATE_SCRUB_TCP;
7784 if (opts->marker & FOM_PRIO)
7785 r->prio = opts->prio ? opts->prio : PF_PRIO_ZERO;
7786 if (opts->marker & FOM_SETPRIO) {
7787 r->set_prio[0] = opts->set_prio[0];
7788 r->set_prio[1] = opts->set_prio[1];
7789 r->scrub_flags |= PFSTATE_SETPRIO;
7790 }
7791 if (opts->marker & FOM_SETTOS) {
7792 r->scrub_flags |= PFSTATE_SETTOS;
7793 r->set_tos = opts->settos;
7794 }
7795
7796 r->flags = opts->flags.b1;
7797 r->flagset = opts->flags.b2;
7798 if ((opts->flags.b1 & opts->flags.b2) != opts->flags.b1) {
7799 yyerror("flags always false");
7800 return (1);
7801 }
7802
7803 if (opts->queues.qname != NULL) {
7804 if (strlcpy(r->qname, opts->queues.qname,
7805 sizeof(r->qname)) >= sizeof(r->qname)) {
7806 yyerror("rule qname too long (max "
7807 "%d chars)", sizeof(r->qname)-1);
7808 return (1);
7809 }
7810 free(opts->queues.qname);
7811 }
7812 if (opts->queues.pqname != NULL) {
7813 if (strlcpy(r->pqname, opts->queues.pqname,
7814 sizeof(r->pqname)) >= sizeof(r->pqname)) {
7815 yyerror("rule pqname too long (max "
7816 "%d chars)", sizeof(r->pqname)-1);
7817 return (1);
7818 }
7819 free(opts->queues.pqname);
7820 }
7821
7822 if (opts->fragment)
7823 r->rule_flag |= PFRULE_FRAGMENT;
7824 r->allow_opts = opts->allowopts;
7825
7826 return (0);
7827 }
7828