1 /* $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2001 Daniel Hartmeier
7 * Copyright (c) 2002,2003 Henning Brauer
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * - Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * - Redistributions in binary form must reproduce the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer in the documentation and/or other materials provided
19 * with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
33 *
34 */
35
36 #include <sys/types.h>
37 #include <sys/ioctl.h>
38 #include <sys/socket.h>
39 #include <sys/param.h>
40 #include <sys/proc.h>
41 #include <net/if_dl.h>
42 #include <net/if.h>
43 #include <netinet/in.h>
44 #include <netinet/in_systm.h>
45 #include <netinet/ip.h>
46 #include <netinet/ip_icmp.h>
47 #include <netinet/icmp6.h>
48 #include <netinet/tcp.h>
49 #include <net/pfvar.h>
50 #include <arpa/inet.h>
51
52 #include <assert.h>
53 #include <search.h>
54 #include <stdio.h>
55 #include <stdlib.h>
56 #include <string.h>
57 #include <ctype.h>
58 #include <netdb.h>
59 #include <stdarg.h>
60 #include <errno.h>
61 #include <err.h>
62 #include <ifaddrs.h>
63 #include <inttypes.h>
64 #include <unistd.h>
65
66 #include "pfctl_parser.h"
67 #include "pfctl.h"
68
69 void print_op (u_int8_t, const char *, const char *);
70 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *, int);
71 void print_ugid (u_int8_t, id_t, id_t, const char *);
72 void print_flags (uint16_t);
73 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
74 struct pf_rule_addr *, sa_family_t, u_int8_t, int, int);
75 int ifa_skip_if(const char *filter, struct node_host *p);
76
77 struct node_host *host_if(const char *, int);
78 struct node_host *host_ip(const char *, int);
79 struct node_host *host_dns(const char *, int, int);
80
81 const char * const tcpflags = "FSRPAUEWe";
82
83 static const struct icmptypeent icmp_type[] = {
84 { "echoreq", ICMP_ECHO },
85 { "echorep", ICMP_ECHOREPLY },
86 { "unreach", ICMP_UNREACH },
87 { "squench", ICMP_SOURCEQUENCH },
88 { "redir", ICMP_REDIRECT },
89 { "althost", ICMP_ALTHOSTADDR },
90 { "routeradv", ICMP_ROUTERADVERT },
91 { "routersol", ICMP_ROUTERSOLICIT },
92 { "timex", ICMP_TIMXCEED },
93 { "paramprob", ICMP_PARAMPROB },
94 { "timereq", ICMP_TSTAMP },
95 { "timerep", ICMP_TSTAMPREPLY },
96 { "inforeq", ICMP_IREQ },
97 { "inforep", ICMP_IREQREPLY },
98 { "maskreq", ICMP_MASKREQ },
99 { "maskrep", ICMP_MASKREPLY },
100 { "trace", ICMP_TRACEROUTE },
101 { "dataconv", ICMP_DATACONVERR },
102 { "mobredir", ICMP_MOBILE_REDIRECT },
103 { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
104 { "ipv6-here", ICMP_IPV6_IAMHERE },
105 { "mobregreq", ICMP_MOBILE_REGREQUEST },
106 { "mobregrep", ICMP_MOBILE_REGREPLY },
107 { "skip", ICMP_SKIP },
108 { "photuris", ICMP_PHOTURIS }
109 };
110
111 static const struct icmptypeent icmp6_type[] = {
112 { "unreach", ICMP6_DST_UNREACH },
113 { "toobig", ICMP6_PACKET_TOO_BIG },
114 { "timex", ICMP6_TIME_EXCEEDED },
115 { "paramprob", ICMP6_PARAM_PROB },
116 { "echoreq", ICMP6_ECHO_REQUEST },
117 { "echorep", ICMP6_ECHO_REPLY },
118 { "groupqry", ICMP6_MEMBERSHIP_QUERY },
119 { "listqry", MLD_LISTENER_QUERY },
120 { "grouprep", ICMP6_MEMBERSHIP_REPORT },
121 { "listenrep", MLD_LISTENER_REPORT },
122 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION },
123 { "listendone", MLD_LISTENER_DONE },
124 { "routersol", ND_ROUTER_SOLICIT },
125 { "routeradv", ND_ROUTER_ADVERT },
126 { "neighbrsol", ND_NEIGHBOR_SOLICIT },
127 { "neighbradv", ND_NEIGHBOR_ADVERT },
128 { "redir", ND_REDIRECT },
129 { "routrrenum", ICMP6_ROUTER_RENUMBERING },
130 { "wrureq", ICMP6_WRUREQUEST },
131 { "wrurep", ICMP6_WRUREPLY },
132 { "fqdnreq", ICMP6_FQDN_QUERY },
133 { "fqdnrep", ICMP6_FQDN_REPLY },
134 { "niqry", ICMP6_NI_QUERY },
135 { "nirep", ICMP6_NI_REPLY },
136 { "mtraceresp", MLD_MTRACE_RESP },
137 { "mtrace", MLD_MTRACE },
138 { "listenrepv2", MLDV2_LISTENER_REPORT },
139 };
140
141 static const struct icmpcodeent icmp_code[] = {
142 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET },
143 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST },
144 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL },
145 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT },
146 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG },
147 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL },
148 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN },
149 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN },
150 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED },
151 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
152 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB },
153 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET },
154 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST },
155 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB },
156 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE },
157 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF },
158 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET },
159 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST },
160 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET },
161 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST },
162 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
163 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
164 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS },
165 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS },
166 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
167 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
168 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
169 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX },
170 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED },
171 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED }
172 };
173
174 static const struct icmpcodeent icmp6_code[] = {
175 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
176 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
177 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
178 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
179 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
180 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
181 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
182 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
183 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
184 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
185 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
186 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
187 };
188
189 const struct pf_timeout pf_timeouts[] = {
190 { "tcp.first", PFTM_TCP_FIRST_PACKET },
191 { "tcp.opening", PFTM_TCP_OPENING },
192 { "tcp.established", PFTM_TCP_ESTABLISHED },
193 { "tcp.closing", PFTM_TCP_CLOSING },
194 { "tcp.finwait", PFTM_TCP_FIN_WAIT },
195 { "tcp.closed", PFTM_TCP_CLOSED },
196 { "tcp.tsdiff", PFTM_TS_DIFF },
197 { "sctp.first", PFTM_SCTP_FIRST_PACKET },
198 { "sctp.opening", PFTM_SCTP_OPENING },
199 { "sctp.established", PFTM_SCTP_ESTABLISHED },
200 { "sctp.closing", PFTM_SCTP_CLOSING },
201 { "sctp.closed", PFTM_SCTP_CLOSED },
202 { "udp.first", PFTM_UDP_FIRST_PACKET },
203 { "udp.single", PFTM_UDP_SINGLE },
204 { "udp.multiple", PFTM_UDP_MULTIPLE },
205 { "icmp.first", PFTM_ICMP_FIRST_PACKET },
206 { "icmp.error", PFTM_ICMP_ERROR_REPLY },
207 { "other.first", PFTM_OTHER_FIRST_PACKET },
208 { "other.single", PFTM_OTHER_SINGLE },
209 { "other.multiple", PFTM_OTHER_MULTIPLE },
210 { "frag", PFTM_FRAG },
211 { "interval", PFTM_INTERVAL },
212 { "adaptive.start", PFTM_ADAPTIVE_START },
213 { "adaptive.end", PFTM_ADAPTIVE_END },
214 { "src.track", PFTM_SRC_NODE },
215 { NULL, 0 }
216 };
217
218 static struct hsearch_data isgroup_map;
219
220 static __attribute__((constructor)) void
pfctl_parser_init(void)221 pfctl_parser_init(void)
222 {
223 /*
224 * As hdestroy() will never be called on these tables, it will be
225 * safe to use references into the stored data as keys.
226 */
227 if (hcreate_r(0, &isgroup_map) == 0)
228 err(1, "Failed to create interface group query response map");
229 }
230
231 void
copy_satopfaddr(struct pf_addr * pfa,struct sockaddr * sa)232 copy_satopfaddr(struct pf_addr *pfa, struct sockaddr *sa)
233 {
234 if (sa->sa_family == AF_INET6)
235 pfa->v6 = ((struct sockaddr_in6 *)sa)->sin6_addr;
236 else if (sa->sa_family == AF_INET)
237 pfa->v4 = ((struct sockaddr_in *)sa)->sin_addr;
238 else
239 warnx("unhandled af %d", sa->sa_family);
240 }
241
242 const struct icmptypeent *
geticmptypebynumber(u_int8_t type,sa_family_t af)243 geticmptypebynumber(u_int8_t type, sa_family_t af)
244 {
245 size_t i;
246
247 if (af != AF_INET6) {
248 for (i=0; i < nitems(icmp_type); i++) {
249 if (type == icmp_type[i].type)
250 return (&icmp_type[i]);
251 }
252 } else {
253 for (i=0; i < nitems(icmp6_type); i++) {
254 if (type == icmp6_type[i].type)
255 return (&icmp6_type[i]);
256 }
257 }
258 return (NULL);
259 }
260
261 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)262 geticmptypebyname(char *w, sa_family_t af)
263 {
264 size_t i;
265
266 if (af != AF_INET6) {
267 for (i=0; i < nitems(icmp_type); i++) {
268 if (!strcmp(w, icmp_type[i].name))
269 return (&icmp_type[i]);
270 }
271 } else {
272 for (i=0; i < nitems(icmp6_type); i++) {
273 if (!strcmp(w, icmp6_type[i].name))
274 return (&icmp6_type[i]);
275 }
276 }
277 return (NULL);
278 }
279
280 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)281 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
282 {
283 size_t i;
284
285 if (af != AF_INET6) {
286 for (i=0; i < nitems(icmp_code); i++) {
287 if (type == icmp_code[i].type &&
288 code == icmp_code[i].code)
289 return (&icmp_code[i]);
290 }
291 } else {
292 for (i=0; i < nitems(icmp6_code); i++) {
293 if (type == icmp6_code[i].type &&
294 code == icmp6_code[i].code)
295 return (&icmp6_code[i]);
296 }
297 }
298 return (NULL);
299 }
300
301 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)302 geticmpcodebyname(u_long type, char *w, sa_family_t af)
303 {
304 size_t i;
305
306 if (af != AF_INET6) {
307 for (i=0; i < nitems(icmp_code); i++) {
308 if (type == icmp_code[i].type &&
309 !strcmp(w, icmp_code[i].name))
310 return (&icmp_code[i]);
311 }
312 } else {
313 for (i=0; i < nitems(icmp6_code); i++) {
314 if (type == icmp6_code[i].type &&
315 !strcmp(w, icmp6_code[i].name))
316 return (&icmp6_code[i]);
317 }
318 }
319 return (NULL);
320 }
321
322 void
print_op(u_int8_t op,const char * a1,const char * a2)323 print_op(u_int8_t op, const char *a1, const char *a2)
324 {
325 if (op == PF_OP_IRG)
326 printf(" %s >< %s", a1, a2);
327 else if (op == PF_OP_XRG)
328 printf(" %s <> %s", a1, a2);
329 else if (op == PF_OP_EQ)
330 printf(" = %s", a1);
331 else if (op == PF_OP_NE)
332 printf(" != %s", a1);
333 else if (op == PF_OP_LT)
334 printf(" < %s", a1);
335 else if (op == PF_OP_LE)
336 printf(" <= %s", a1);
337 else if (op == PF_OP_GT)
338 printf(" > %s", a1);
339 else if (op == PF_OP_GE)
340 printf(" >= %s", a1);
341 else if (op == PF_OP_RRG)
342 printf(" %s:%s", a1, a2);
343 }
344
345 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto,int numeric)346 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto, int numeric)
347 {
348 char a1[6], a2[6];
349 struct servent *s;
350
351 if (!numeric)
352 s = getservbyport(p1, proto);
353 else
354 s = NULL;
355 p1 = ntohs(p1);
356 p2 = ntohs(p2);
357 snprintf(a1, sizeof(a1), "%u", p1);
358 snprintf(a2, sizeof(a2), "%u", p2);
359 printf(" port");
360 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
361 print_op(op, s->s_name, a2);
362 else
363 print_op(op, a1, a2);
364 }
365
366 void
print_ugid(u_int8_t op,id_t i1,id_t i2,const char * t)367 print_ugid(u_int8_t op, id_t i1, id_t i2, const char *t)
368 {
369 char a1[11], a2[11];
370
371 snprintf(a1, sizeof(a1), "%ju", (uintmax_t)i1);
372 snprintf(a2, sizeof(a2), "%ju", (uintmax_t)i2);
373 printf(" %s", t);
374 if (i1 == -1 && (op == PF_OP_EQ || op == PF_OP_NE))
375 print_op(op, "unknown", a2);
376 else
377 print_op(op, a1, a2);
378 }
379
380 void
print_flags(uint16_t f)381 print_flags(uint16_t f)
382 {
383 int i;
384
385 for (i = 0; tcpflags[i]; ++i)
386 if (f & (1 << i))
387 printf("%c", tcpflags[i]);
388 }
389
390 void
print_fromto(struct pf_rule_addr * src,pf_osfp_t osfp,struct pf_rule_addr * dst,sa_family_t af,u_int8_t proto,int verbose,int numeric)391 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
392 sa_family_t af, u_int8_t proto, int verbose, int numeric)
393 {
394 char buf[PF_OSFP_LEN*3];
395 if (src->addr.type == PF_ADDR_ADDRMASK &&
396 dst->addr.type == PF_ADDR_ADDRMASK &&
397 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
398 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
399 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
400 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
401 !src->neg && !dst->neg &&
402 !src->port_op && !dst->port_op &&
403 osfp == PF_OSFP_ANY)
404 printf(" all");
405 else {
406 printf(" from ");
407 if (src->neg)
408 printf("! ");
409 print_addr(&src->addr, af, verbose);
410 if (src->port_op)
411 print_port(src->port_op, src->port[0],
412 src->port[1],
413 proto == IPPROTO_TCP ? "tcp" : "udp",
414 numeric);
415 if (osfp != PF_OSFP_ANY)
416 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
417 sizeof(buf)));
418
419 printf(" to ");
420 if (dst->neg)
421 printf("! ");
422 print_addr(&dst->addr, af, verbose);
423 if (dst->port_op)
424 print_port(dst->port_op, dst->port[0],
425 dst->port[1],
426 proto == IPPROTO_TCP ? "tcp" : "udp",
427 numeric);
428 }
429 }
430
431 void
print_pool(struct pfctl_pool * pool,u_int16_t p1,u_int16_t p2,int id)432 print_pool(struct pfctl_pool *pool, u_int16_t p1, u_int16_t p2, int id)
433 {
434 struct pfctl_pooladdr *pooladdr;
435
436 if ((TAILQ_FIRST(&pool->list) != NULL) &&
437 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
438 printf("{ ");
439 TAILQ_FOREACH(pooladdr, &pool->list, entries){
440 switch (id) {
441 case PF_NAT:
442 case PF_RDR:
443 case PF_BINAT:
444 print_addr(&pooladdr->addr, pooladdr->af, 0);
445 break;
446 case PF_PASS:
447 case PF_MATCH:
448 if (PF_AZERO(&pooladdr->addr.v.a.addr, pooladdr->af))
449 printf("%s", pooladdr->ifname);
450 else {
451 printf("(%s ", pooladdr->ifname);
452 print_addr(&pooladdr->addr, pooladdr->af, 0);
453 printf(")");
454 }
455 break;
456 default:
457 break;
458 }
459 if (TAILQ_NEXT(pooladdr, entries) != NULL)
460 printf(", ");
461 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
462 printf(" }");
463 }
464 switch (id) {
465 case PF_NAT:
466 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
467 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
468 if (p1 == p2)
469 printf(" port %u", p1);
470 else
471 printf(" port %u:%u", p1, p2);
472 }
473 break;
474 case PF_RDR:
475 if (p1) {
476 printf(" port %u", p1);
477 if (p2 && (p2 != p1))
478 printf(":%u", p2);
479 }
480 break;
481 default:
482 break;
483 }
484 switch (pool->opts & PF_POOL_TYPEMASK) {
485 case PF_POOL_NONE:
486 break;
487 case PF_POOL_BITMASK:
488 printf(" bitmask");
489 break;
490 case PF_POOL_RANDOM:
491 printf(" random");
492 break;
493 case PF_POOL_SRCHASH:
494 printf(" source-hash 0x%08x%08x%08x%08x",
495 pool->key.key32[0], pool->key.key32[1],
496 pool->key.key32[2], pool->key.key32[3]);
497 break;
498 case PF_POOL_ROUNDROBIN:
499 printf(" round-robin");
500 break;
501 }
502 if (pool->opts & PF_POOL_STICKYADDR)
503 printf(" sticky-address");
504 if (pool->opts & PF_POOL_ENDPI)
505 printf(" endpoint-independent");
506 if (id == PF_NAT && p1 == 0 && p2 == 0)
507 printf(" static-port");
508 if (pool->mape.offset > 0)
509 printf(" map-e-portset %u/%u/%u",
510 pool->mape.offset, pool->mape.psidlen, pool->mape.psid);
511 if (pool->opts & PF_POOL_IPV6NH)
512 printf(" prefer-ipv6-nexthop");
513 }
514
515 void
print_status(struct pfctl_status * s,struct pfctl_syncookies * cookies,int opts)516 print_status(struct pfctl_status *s, struct pfctl_syncookies *cookies, int opts)
517 {
518 struct pfctl_status_counter *c;
519 char statline[80], *running;
520 time_t runtime;
521 int i;
522 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
523 static const char hex[] = "0123456789abcdef";
524
525 runtime = time(NULL) - s->since;
526 running = s->running ? "Enabled" : "Disabled";
527
528 if (s->since) {
529 unsigned int sec, min, hrs;
530 time_t day = runtime;
531
532 sec = day % 60;
533 day /= 60;
534 min = day % 60;
535 day /= 60;
536 hrs = day % 24;
537 day /= 24;
538 snprintf(statline, sizeof(statline),
539 "Status: %s for %lld days %.2u:%.2u:%.2u",
540 running, (long long)day, hrs, min, sec);
541 } else
542 snprintf(statline, sizeof(statline), "Status: %s", running);
543 printf("%-44s", statline);
544 switch (s->debug) {
545 case PF_DEBUG_NONE:
546 printf("%15s\n\n", "Debug: None");
547 break;
548 case PF_DEBUG_URGENT:
549 printf("%15s\n\n", "Debug: Urgent");
550 break;
551 case PF_DEBUG_MISC:
552 printf("%15s\n\n", "Debug: Misc");
553 break;
554 case PF_DEBUG_NOISY:
555 printf("%15s\n\n", "Debug: Loud");
556 break;
557 }
558
559 if (opts & PF_OPT_VERBOSE) {
560 printf("Hostid: 0x%08x\n", s->hostid);
561
562 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
563 buf[i + i] = hex[s->pf_chksum[i] >> 4];
564 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
565 }
566 buf[i + i] = '\0';
567 printf("Checksum: 0x%s\n\n", buf);
568 }
569
570 if (s->ifname[0] != 0) {
571 printf("Interface Stats for %-16s %5s %16s\n",
572 s->ifname, "IPv4", "IPv6");
573 printf(" %-25s %14llu %16llu\n", "Bytes In",
574 (unsigned long long)s->bcounters[0][0],
575 (unsigned long long)s->bcounters[1][0]);
576 printf(" %-25s %14llu %16llu\n", "Bytes Out",
577 (unsigned long long)s->bcounters[0][1],
578 (unsigned long long)s->bcounters[1][1]);
579 printf(" Packets In\n");
580 printf(" %-23s %14llu %16llu\n", "Passed",
581 (unsigned long long)s->pcounters[0][0][PF_PASS],
582 (unsigned long long)s->pcounters[1][0][PF_PASS]);
583 printf(" %-23s %14llu %16llu\n", "Blocked",
584 (unsigned long long)s->pcounters[0][0][PF_DROP],
585 (unsigned long long)s->pcounters[1][0][PF_DROP]);
586 printf(" Packets Out\n");
587 printf(" %-23s %14llu %16llu\n", "Passed",
588 (unsigned long long)s->pcounters[0][1][PF_PASS],
589 (unsigned long long)s->pcounters[1][1][PF_PASS]);
590 printf(" %-23s %14llu %16llu\n\n", "Blocked",
591 (unsigned long long)s->pcounters[0][1][PF_DROP],
592 (unsigned long long)s->pcounters[1][1][PF_DROP]);
593 }
594 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
595 printf(" %-25s %14ju %14s\n", "current entries", s->states, "");
596 TAILQ_FOREACH(c, &s->fcounters, entry) {
597 printf(" %-25s %14ju ", c->name, c->counter);
598 if (runtime > 0)
599 printf("%14.1f/s\n",
600 (double)c->counter / (double)runtime);
601 else
602 printf("%14s\n", "");
603 }
604 if (opts & PF_OPT_VERBOSE) {
605 printf("Source Tracking Table\n");
606 printf(" %-25s %14ju %14s\n", "current entries",
607 s->src_nodes, "");
608 TAILQ_FOREACH(c, &s->scounters, entry) {
609 printf(" %-25s %14ju ", c->name, c->counter);
610 if (runtime > 0)
611 printf("%14.1f/s\n",
612 (double)c->counter / (double)runtime);
613 else
614 printf("%14s\n", "");
615 }
616 }
617 if (opts & PF_OPT_VERBOSE) {
618 printf("Fragments\n");
619 printf(" %-25s %14ju %14s\n", "current entries",
620 s->fragments, "");
621 TAILQ_FOREACH(c, &s->ncounters, entry) {
622 printf(" %-25s %14ju ", c->name,
623 c->counter);
624 if (runtime > 0)
625 printf("%14.1f/s\n",
626 (double)c->counter / (double)runtime);
627 else
628 printf("%14s\n", "");
629 }
630 }
631 printf("Counters\n");
632 TAILQ_FOREACH(c, &s->counters, entry) {
633 printf(" %-25s %14ju ", c->name, c->counter);
634 if (runtime > 0)
635 printf("%14.1f/s\n",
636 (double)c->counter / (double)runtime);
637 else
638 printf("%14s\n", "");
639 }
640 if (opts & PF_OPT_VERBOSE) {
641 printf("Limit Counters\n");
642 TAILQ_FOREACH(c, &s->lcounters, entry) {
643 printf(" %-25s %14ju ", c->name, c->counter);
644 if (runtime > 0)
645 printf("%14.1f/s\n",
646 (double)c->counter / (double)runtime);
647 else
648 printf("%14s\n", "");
649 }
650
651 printf("Syncookies\n");
652 assert(cookies->mode <= PFCTL_SYNCOOKIES_ADAPTIVE);
653 printf(" %-25s %s\n", "mode",
654 PFCTL_SYNCOOKIES_MODE_NAMES[cookies->mode]);
655 printf(" %-25s %s\n", "active",
656 s->syncookies_active ? "active" : "inactive");
657 if (opts & PF_OPT_VERBOSE2) {
658 printf(" %-25s %d %%\n", "highwater", cookies->highwater);
659 printf(" %-25s %d %%\n", "lowwater", cookies->lowwater);
660 printf(" %-25s %d\n", "halfopen states", cookies->halfopen_states);
661 }
662 printf("Reassemble %24s %s\n",
663 s->reass & PF_REASS_ENABLED ? "yes" : "no",
664 s->reass & PF_REASS_NODF ? "no-df" : ""
665 );
666 }
667 }
668
669 void
print_running(struct pfctl_status * status)670 print_running(struct pfctl_status *status)
671 {
672 printf("%s\n", status->running ? "Enabled" : "Disabled");
673 }
674
675 void
print_src_node(struct pfctl_src_node * sn,int opts)676 print_src_node(struct pfctl_src_node *sn, int opts)
677 {
678 struct pf_addr_wrap aw;
679 uint64_t min, sec;
680 const char *sn_type_names[] = PF_SN_TYPE_NAMES;
681
682 memset(&aw, 0, sizeof(aw));
683 if (sn->af == AF_INET)
684 aw.v.a.mask.addr32[0] = 0xffffffff;
685 else
686 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
687
688 aw.v.a.addr = sn->addr;
689 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
690 printf(" -> ");
691 aw.v.a.addr = sn->raddr;
692 print_addr(&aw, sn->raf, opts & PF_OPT_VERBOSE2);
693 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
694 sn->conn, sn->conn_rate.count / 1000,
695 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
696 if (opts & PF_OPT_VERBOSE) {
697 sec = sn->creation % 60;
698 sn->creation /= 60;
699 min = sn->creation % 60;
700 sn->creation /= 60;
701 printf(" age %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
702 sn->creation, min, sec);
703 if (sn->states == 0) {
704 sec = sn->expire % 60;
705 sn->expire /= 60;
706 min = sn->expire % 60;
707 sn->expire /= 60;
708 printf(", expires in %.2" PRIu64 ":%.2" PRIu64 ":%.2" PRIu64,
709 sn->expire, min, sec);
710 }
711 printf(", %" PRIu64 " pkts, %" PRIu64 " bytes",
712 sn->packets[0] + sn->packets[1],
713 sn->bytes[0] + sn->bytes[1]);
714 switch (sn->ruletype) {
715 case PF_NAT:
716 if (sn->rule != -1)
717 printf(", nat rule %u", sn->rule);
718 break;
719 case PF_RDR:
720 if (sn->rule != -1)
721 printf(", rdr rule %u", sn->rule);
722 break;
723 case PF_PASS:
724 case PF_MATCH:
725 if (sn->rule != -1)
726 printf(", filter rule %u", sn->rule);
727 break;
728 }
729 printf(", %s", sn_type_names[sn->type]);
730 printf("\n");
731 }
732 }
733
734 static void
print_eth_addr(const struct pfctl_eth_addr * a)735 print_eth_addr(const struct pfctl_eth_addr *a)
736 {
737 int i, masklen = ETHER_ADDR_LEN * 8;
738 bool seen_unset = false;
739
740 for (i = 0; i < ETHER_ADDR_LEN; i++) {
741 if (a->addr[i] != 0)
742 break;
743 }
744
745 /* Unset, so don't print anything. */
746 if (i == ETHER_ADDR_LEN)
747 return;
748
749 printf("%s%02x:%02x:%02x:%02x:%02x:%02x", a->neg ? "! " : "",
750 a->addr[0], a->addr[1], a->addr[2], a->addr[3], a->addr[4],
751 a->addr[5]);
752
753 for (i = 0; i < (ETHER_ADDR_LEN * 8); i++) {
754 bool isset = a->mask[i / 8] & (1 << i % 8);
755
756 if (! seen_unset) {
757 if (isset)
758 continue;
759 seen_unset = true;
760 masklen = i;
761 } else {
762 /* Not actually a continuous mask, so print the whole
763 * thing. */
764 if (isset)
765 break;
766 continue;
767 }
768 }
769
770 if (masklen == (ETHER_ADDR_LEN * 8))
771 return;
772
773 if (i == (ETHER_ADDR_LEN * 8)) {
774 printf("/%d", masklen);
775 return;
776 }
777
778 printf("&%02x:%02x:%02x:%02x:%02x:%02x",
779 a->mask[0], a->mask[1], a->mask[2], a->mask[3], a->mask[4],
780 a->mask[5]);
781 }
782
783 void
print_eth_rule(struct pfctl_eth_rule * r,const char * anchor_call,int rule_numbers)784 print_eth_rule(struct pfctl_eth_rule *r, const char *anchor_call,
785 int rule_numbers)
786 {
787 static const char *actiontypes[] = { "pass", "block", "", "", "", "",
788 "", "", "", "", "", "", "match" };
789
790 int i;
791
792 if (rule_numbers)
793 printf("@%u ", r->nr);
794
795 printf("ether ");
796 if (anchor_call[0]) {
797 if (anchor_call[0] == '_') {
798 printf("anchor");
799 } else
800 printf("anchor \"%s\"", anchor_call);
801 } else {
802 printf("%s", actiontypes[r->action]);
803 }
804 if (r->direction == PF_IN)
805 printf(" in");
806 else if (r->direction == PF_OUT)
807 printf(" out");
808
809 if (r->quick)
810 printf(" quick");
811 if (r->ifname[0]) {
812 if (r->ifnot)
813 printf(" on ! %s", r->ifname);
814 else
815 printf(" on %s", r->ifname);
816 }
817 if (r->bridge_to[0])
818 printf(" bridge-to %s", r->bridge_to);
819 if (r->proto)
820 printf(" proto 0x%04x", r->proto);
821
822 if (r->src.isset) {
823 printf(" from ");
824 print_eth_addr(&r->src);
825 }
826 if (r->dst.isset) {
827 printf(" to ");
828 print_eth_addr(&r->dst);
829 }
830 printf(" l3");
831 print_fromto(&r->ipsrc, PF_OSFP_ANY, &r->ipdst,
832 r->proto == ETHERTYPE_IP ? AF_INET : AF_INET6, 0,
833 0, 0);
834
835 i = 0;
836 while (r->label[i][0])
837 printf(" label \"%s\"", r->label[i++]);
838 if (r->ridentifier)
839 printf(" ridentifier %u", r->ridentifier);
840
841 if (r->qname[0])
842 printf(" queue %s", r->qname);
843 if (r->tagname[0])
844 printf(" tag %s", r->tagname);
845 if (r->match_tagname[0]) {
846 if (r->match_tag_not)
847 printf(" !");
848 printf(" tagged %s", r->match_tagname);
849 }
850 if (r->dnpipe)
851 printf(" %s %d",
852 r->dnflags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
853 r->dnpipe);
854 }
855
856 void
print_rule(struct pfctl_rule * r,const char * anchor_call,int verbose,int numeric)857 print_rule(struct pfctl_rule *r, const char *anchor_call, int verbose, int numeric)
858 {
859 static const char *actiontypes[] = { "pass", "block", "scrub",
860 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr",
861 "synproxy drop", "defer", "match", "af-rt", "route-to" };
862 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
863 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
864 "binat-anchor", "rdr-anchor", "rdr-anchor" };
865 int i, ropts;
866 char *p;
867
868 if (verbose)
869 printf("@%d ", r->nr);
870 if (anchor_call[0]) {
871 if (r->action >= nitems(anchortypes)) {
872 printf("anchor(%d)", r->action);
873 } else {
874 p = strrchr(anchor_call, '/');
875 if (p ? p[1] == '_' : anchor_call[0] == '_')
876 printf("%s", anchortypes[r->action]);
877 else
878 printf("%s \"%s\"", anchortypes[r->action],
879 anchor_call);
880 }
881 } else {
882 if (r->action >= nitems(actiontypes))
883 printf("action(%d)", r->action);
884 else
885 printf("%s", actiontypes[r->action]);
886 }
887 if (r->action == PF_DROP) {
888 if (r->rule_flag & PFRULE_RETURN)
889 printf(" return");
890 else if (r->rule_flag & PFRULE_RETURNRST) {
891 if (!r->return_ttl)
892 printf(" return-rst");
893 else
894 printf(" return-rst(ttl %d)", r->return_ttl);
895 } else if (r->rule_flag & PFRULE_RETURNICMP) {
896 const struct icmpcodeent *ic, *ic6;
897
898 ic = geticmpcodebynumber(r->return_icmp >> 8,
899 r->return_icmp & 255, AF_INET);
900 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
901 r->return_icmp6 & 255, AF_INET6);
902
903 switch (r->af) {
904 case AF_INET:
905 printf(" return-icmp");
906 if (ic == NULL)
907 printf("(%u)", r->return_icmp & 255);
908 else
909 printf("(%s)", ic->name);
910 break;
911 case AF_INET6:
912 printf(" return-icmp6");
913 if (ic6 == NULL)
914 printf("(%u)", r->return_icmp6 & 255);
915 else
916 printf("(%s)", ic6->name);
917 break;
918 default:
919 printf(" return-icmp");
920 if (ic == NULL)
921 printf("(%u, ", r->return_icmp & 255);
922 else
923 printf("(%s, ", ic->name);
924 if (ic6 == NULL)
925 printf("%u)", r->return_icmp6 & 255);
926 else
927 printf("%s)", ic6->name);
928 break;
929 }
930 } else
931 printf(" drop");
932 }
933 if (r->direction == PF_IN)
934 printf(" in");
935 else if (r->direction == PF_OUT)
936 printf(" out");
937 if (r->log) {
938 printf(" log");
939 if (r->log & ~PF_LOG || r->logif) {
940 int count = 0;
941
942 printf(" (");
943 if (r->log & PF_LOG_ALL)
944 printf("%sall", count++ ? ", " : "");
945 if (r->log & PF_LOG_MATCHES)
946 printf("%smatches", count++ ? ", " : "");
947 if (r->log & PF_LOG_USER)
948 printf("%suser", count++ ? ", " : "");
949 if (r->logif)
950 printf("%sto pflog%u", count++ ? ", " : "",
951 r->logif);
952 printf(")");
953 }
954 }
955 if (r->quick)
956 printf(" quick");
957 if (r->ifname[0]) {
958 if (r->ifnot)
959 printf(" on ! %s", r->ifname);
960 else
961 printf(" on %s", r->ifname);
962 }
963 if (r->rt) {
964 if (r->rt == PF_ROUTETO)
965 printf(" route-to");
966 else if (r->rt == PF_REPLYTO)
967 printf(" reply-to");
968 else if (r->rt == PF_DUPTO)
969 printf(" dup-to");
970 printf(" ");
971 print_pool(&r->route, 0, 0, PF_PASS);
972 }
973 if (r->af) {
974 if (r->af == AF_INET)
975 printf(" inet");
976 else
977 printf(" inet6");
978 }
979 if (r->proto) {
980 const char *protoname;
981
982 if ((protoname = pfctl_proto2name(r->proto)) != NULL)
983 printf(" proto %s", protoname);
984 else
985 printf(" proto %u", r->proto);
986 }
987 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
988 verbose, numeric);
989 if (r->rcv_ifname[0])
990 printf(" %sreceived-on %s", r->rcvifnot ? "!" : "",
991 r->rcv_ifname);
992 if (r->uid.op)
993 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user");
994 if (r->gid.op)
995 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group");
996 if (r->flags || r->flagset) {
997 printf(" flags ");
998 print_flags(r->flags);
999 printf("/");
1000 print_flags(r->flagset);
1001 } else if ((r->action == PF_PASS || r->action == PF_MATCH) &&
1002 (!r->proto || r->proto == IPPROTO_TCP) &&
1003 !(r->rule_flag & PFRULE_FRAGMENT) &&
1004 !anchor_call[0] && r->keep_state)
1005 printf(" flags any");
1006 if (r->type) {
1007 const struct icmptypeent *it;
1008
1009 it = geticmptypebynumber(r->type-1, r->af);
1010 if (r->af != AF_INET6)
1011 printf(" icmp-type");
1012 else
1013 printf(" icmp6-type");
1014 if (it != NULL)
1015 printf(" %s", it->name);
1016 else
1017 printf(" %u", r->type-1);
1018 if (r->code) {
1019 const struct icmpcodeent *ic;
1020
1021 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
1022 if (ic != NULL)
1023 printf(" code %s", ic->name);
1024 else
1025 printf(" code %u", r->code-1);
1026 }
1027 }
1028 if (r->tos)
1029 printf(" tos 0x%2.2x", r->tos);
1030 if (r->prio)
1031 printf(" prio %u", r->prio == PF_PRIO_ZERO ? 0 : r->prio);
1032 if (r->pktrate.limit)
1033 printf(" max-pkt-rate %u/%u", r->pktrate.limit,
1034 r->pktrate.seconds);
1035 if (r->max_pkt_size)
1036 printf( " max-pkt-size %u", r->max_pkt_size);
1037 if (r->scrub_flags & PFSTATE_SETMASK) {
1038 char *comma = "";
1039 printf(" set (");
1040 if (r->scrub_flags & PFSTATE_SETPRIO) {
1041 if (r->set_prio[0] == r->set_prio[1])
1042 printf("%s prio %u", comma, r->set_prio[0]);
1043 else
1044 printf("%s prio(%u, %u)", comma, r->set_prio[0],
1045 r->set_prio[1]);
1046 comma = ",";
1047 }
1048 if (r->scrub_flags & PFSTATE_SETTOS) {
1049 printf("%s tos 0x%2.2x", comma, r->set_tos);
1050 comma = ",";
1051 }
1052 printf(" )");
1053 }
1054 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
1055 printf(" no state");
1056 else if (r->keep_state == PF_STATE_NORMAL)
1057 printf(" keep state");
1058 else if (r->keep_state == PF_STATE_MODULATE)
1059 printf(" modulate state");
1060 else if (r->keep_state == PF_STATE_SYNPROXY)
1061 printf(" synproxy state");
1062 if (r->prob) {
1063 char buf[20];
1064
1065 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
1066 for (i = strlen(buf)-1; i > 0; i--) {
1067 if (buf[i] == '0')
1068 buf[i] = '\0';
1069 else {
1070 if (buf[i] == '.')
1071 buf[i] = '\0';
1072 break;
1073 }
1074 }
1075 printf(" probability %s%%", buf);
1076 }
1077 ropts = 0;
1078 if (r->max_states || r->max_src_nodes || r->max_src_states)
1079 ropts = 1;
1080 if (r->rule_flag & PFRULE_NOSYNC)
1081 ropts = 1;
1082 if (r->rule_flag & PFRULE_SRCTRACK)
1083 ropts = 1;
1084 if (r->rule_flag & PFRULE_IFBOUND)
1085 ropts = 1;
1086 if (r->rule_flag & PFRULE_STATESLOPPY)
1087 ropts = 1;
1088 if (r->rule_flag & PFRULE_PFLOW)
1089 ropts = 1;
1090 for (i = 0; !ropts && i < PFTM_MAX; ++i)
1091 if (r->timeout[i])
1092 ropts = 1;
1093 if (ropts) {
1094 printf(" (");
1095 if (r->max_states) {
1096 printf("max %u", r->max_states);
1097 ropts = 0;
1098 }
1099 if (r->rule_flag & PFRULE_NOSYNC) {
1100 if (!ropts)
1101 printf(", ");
1102 printf("no-sync");
1103 ropts = 0;
1104 }
1105 if (r->rule_flag & PFRULE_SRCTRACK) {
1106 if (!ropts)
1107 printf(", ");
1108 printf("source-track");
1109 if (r->rule_flag & PFRULE_RULESRCTRACK)
1110 printf(" rule");
1111 else
1112 printf(" global");
1113 ropts = 0;
1114 }
1115 if (r->max_src_states) {
1116 if (!ropts)
1117 printf(", ");
1118 printf("max-src-states %u", r->max_src_states);
1119 ropts = 0;
1120 }
1121 if (r->max_src_conn) {
1122 if (!ropts)
1123 printf(", ");
1124 printf("max-src-conn %u", r->max_src_conn);
1125 ropts = 0;
1126 }
1127 if (r->max_src_conn_rate.limit) {
1128 if (!ropts)
1129 printf(", ");
1130 printf("max-src-conn-rate %u/%u",
1131 r->max_src_conn_rate.limit,
1132 r->max_src_conn_rate.seconds);
1133 ropts = 0;
1134 }
1135 if (r->max_src_nodes) {
1136 if (!ropts)
1137 printf(", ");
1138 printf("max-src-nodes %u", r->max_src_nodes);
1139 ropts = 0;
1140 }
1141 if (r->overload_tblname[0]) {
1142 if (!ropts)
1143 printf(", ");
1144 printf("overload <%s>", r->overload_tblname);
1145 if (r->flush)
1146 printf(" flush");
1147 if (r->flush & PF_FLUSH_GLOBAL)
1148 printf(" global");
1149 }
1150 if (r->rule_flag & PFRULE_IFBOUND) {
1151 if (!ropts)
1152 printf(", ");
1153 printf("if-bound");
1154 ropts = 0;
1155 }
1156 if (r->rule_flag & PFRULE_STATESLOPPY) {
1157 if (!ropts)
1158 printf(", ");
1159 printf("sloppy");
1160 ropts = 0;
1161 }
1162 if (r->rule_flag & PFRULE_PFLOW) {
1163 if (!ropts)
1164 printf(", ");
1165 printf("pflow");
1166 ropts = 0;
1167 }
1168 for (i = 0; i < PFTM_MAX; ++i)
1169 if (r->timeout[i]) {
1170 int j;
1171
1172 if (!ropts)
1173 printf(", ");
1174 ropts = 0;
1175 for (j = 0; pf_timeouts[j].name != NULL;
1176 ++j)
1177 if (pf_timeouts[j].timeout == i)
1178 break;
1179 printf("%s %u", pf_timeouts[j].name == NULL ?
1180 "inv.timeout" : pf_timeouts[j].name,
1181 r->timeout[i]);
1182 }
1183 printf(")");
1184 }
1185 if (r->allow_opts)
1186 printf(" allow-opts");
1187 if (r->rule_flag & PFRULE_FRAGMENT)
1188 printf(" fragment");
1189 if (r->action == PF_SCRUB) {
1190 /* Scrub flags for old-style scrub. */
1191 if (r->rule_flag & PFRULE_NODF)
1192 printf(" no-df");
1193 if (r->rule_flag & PFRULE_RANDOMID)
1194 printf(" random-id");
1195 if (r->min_ttl)
1196 printf(" min-ttl %d", r->min_ttl);
1197 if (r->max_mss)
1198 printf(" max-mss %d", r->max_mss);
1199 if (r->rule_flag & PFRULE_SET_TOS)
1200 printf(" set-tos 0x%2.2x", r->set_tos);
1201 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
1202 printf(" reassemble tcp");
1203 /* The PFRULE_FRAGMENT_NOREASS is set on all rules by default! */
1204 printf(" fragment %sreassemble",
1205 r->rule_flag & PFRULE_FRAGMENT_NOREASS ? "no " : "");
1206 } else if (r->scrub_flags & PFSTATE_SCRUBMASK || r->min_ttl || r->max_mss) {
1207 /* Scrub actions on normal rules. */
1208 printf(" scrub(");
1209 if (r->scrub_flags & PFSTATE_NODF)
1210 printf(" no-df");
1211 if (r->scrub_flags & PFSTATE_RANDOMID)
1212 printf(" random-id");
1213 if (r->min_ttl)
1214 printf(" min-ttl %d", r->min_ttl);
1215 if (r->scrub_flags & PFSTATE_SETTOS)
1216 printf(" set-tos 0x%2.2x", r->set_tos);
1217 if (r->scrub_flags & PFSTATE_SCRUB_TCP)
1218 printf(" reassemble tcp");
1219 if (r->max_mss)
1220 printf(" max-mss %d", r->max_mss);
1221 printf(")");
1222 }
1223 i = 0;
1224 while (r->label[i][0])
1225 printf(" label \"%s\"", r->label[i++]);
1226 if (r->ridentifier)
1227 printf(" ridentifier %u", r->ridentifier);
1228 /* Only dnrpipe as we might do (0, 42) to only queue return traffic. */
1229 if (r->dnrpipe)
1230 printf(" %s(%d, %d)",
1231 r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1232 r->dnpipe, r->dnrpipe);
1233 else if (r->dnpipe)
1234 printf(" %s %d",
1235 r->free_flags & PFRULE_DN_IS_PIPE ? "dnpipe" : "dnqueue",
1236 r->dnpipe);
1237 if (r->qname[0] && r->pqname[0])
1238 printf(" queue(%s, %s)", r->qname, r->pqname);
1239 else if (r->qname[0])
1240 printf(" queue %s", r->qname);
1241 if (r->tagname[0])
1242 printf(" tag %s", r->tagname);
1243 if (r->match_tagname[0]) {
1244 if (r->match_tag_not)
1245 printf(" !");
1246 printf(" tagged %s", r->match_tagname);
1247 }
1248 if (r->rtableid != -1)
1249 printf(" rtable %u", r->rtableid);
1250 if (r->divert.port) {
1251 #ifdef __FreeBSD__
1252 printf(" divert-to %u", ntohs(r->divert.port));
1253 #else
1254 if (PF_AZERO(&r->divert.addr, r->af)) {
1255 printf(" divert-reply");
1256 } else {
1257 printf(" divert-to ");
1258 print_addr_str(r->af, &r->divert.addr);
1259 printf(" port %u", ntohs(r->divert.port));
1260 }
1261 #endif
1262 }
1263 if (anchor_call[0])
1264 return;
1265 if (r->action == PF_NAT || r->action == PF_BINAT || r->action == PF_RDR) {
1266 printf(" -> ");
1267 print_pool(&r->rdr, r->rdr.proxy_port[0],
1268 r->rdr.proxy_port[1], r->action);
1269 } else {
1270 if (!TAILQ_EMPTY(&r->nat.list)) {
1271 if (r->rule_flag & PFRULE_AFTO) {
1272 printf(" af-to %s from ", r->naf == AF_INET ? "inet" : (r->naf == AF_INET6 ? "inet6" : "? "));
1273 } else {
1274 printf(" nat-to ");
1275 }
1276 print_pool(&r->nat, r->nat.proxy_port[0],
1277 r->nat.proxy_port[1], PF_NAT);
1278 }
1279 if (!TAILQ_EMPTY(&r->rdr.list)) {
1280 if (r->rule_flag & PFRULE_AFTO) {
1281 printf(" to ");
1282 } else {
1283 printf(" rdr-to ");
1284 }
1285 print_pool(&r->rdr, r->rdr.proxy_port[0],
1286 r->rdr.proxy_port[1], PF_RDR);
1287 }
1288 }
1289 }
1290
1291 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1292 print_tabledef(const char *name, int flags, int addrs,
1293 struct node_tinithead *nodes)
1294 {
1295 struct node_tinit *ti, *nti;
1296 struct node_host *h;
1297
1298 printf("table <%s>", name);
1299 if (flags & PFR_TFLAG_CONST)
1300 printf(" const");
1301 if (flags & PFR_TFLAG_PERSIST)
1302 printf(" persist");
1303 if (flags & PFR_TFLAG_COUNTERS)
1304 printf(" counters");
1305 SIMPLEQ_FOREACH(ti, nodes, entries) {
1306 if (ti->file) {
1307 printf(" file \"%s\"", ti->file);
1308 continue;
1309 }
1310 printf(" {");
1311 for (;;) {
1312 for (h = ti->host; h != NULL; h = h->next) {
1313 printf(h->not ? " !" : " ");
1314 print_addr(&h->addr, h->af, 0);
1315 }
1316 nti = SIMPLEQ_NEXT(ti, entries);
1317 if (nti != NULL && nti->file == NULL)
1318 ti = nti; /* merge lists */
1319 else
1320 break;
1321 }
1322 printf(" }");
1323 }
1324 if (addrs && SIMPLEQ_EMPTY(nodes))
1325 printf(" { }");
1326 printf("\n");
1327 }
1328
1329 int
parse_flags(char * s)1330 parse_flags(char *s)
1331 {
1332 char *p, *q;
1333 uint16_t f = 0;
1334
1335 for (p = s; *p; p++) {
1336 if ((q = strchr(tcpflags, *p)) == NULL)
1337 return -1;
1338 else
1339 f |= 1 << (q - tcpflags);
1340 }
1341 return (f ? f : TH_FLAGS);
1342 }
1343
1344 void
set_ipmask(struct node_host * h,int bb)1345 set_ipmask(struct node_host *h, int bb)
1346 {
1347 struct pf_addr *m, *n;
1348 int i, j = 0;
1349 uint8_t b;
1350
1351 m = &h->addr.v.a.mask;
1352 memset(m, 0, sizeof(*m));
1353
1354 if (bb == -1)
1355 b = h->af == AF_INET ? 32 : 128;
1356 else
1357 b = bb;
1358
1359 while (b >= 32) {
1360 m->addr32[j++] = 0xffffffff;
1361 b -= 32;
1362 }
1363 for (i = 31; i > 31-b; --i)
1364 m->addr32[j] |= (1 << i);
1365 if (b)
1366 m->addr32[j] = htonl(m->addr32[j]);
1367
1368 /* Mask off bits of the address that will never be used. */
1369 n = &h->addr.v.a.addr;
1370 if (h->addr.type == PF_ADDR_ADDRMASK)
1371 for (i = 0; i < 4; i++)
1372 n->addr32[i] = n->addr32[i] & m->addr32[i];
1373 }
1374
1375 int
check_netmask(struct node_host * h,sa_family_t af)1376 check_netmask(struct node_host *h, sa_family_t af)
1377 {
1378 struct node_host *n = NULL;
1379 struct pf_addr *m;
1380
1381 for (n = h; n != NULL; n = n->next) {
1382 if (h->addr.type == PF_ADDR_TABLE)
1383 continue;
1384 m = &h->addr.v.a.mask;
1385 /* netmasks > 32 bit are invalid on v4 */
1386 if (af == AF_INET &&
1387 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1388 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1389 unmask(m));
1390 return (1);
1391 }
1392 }
1393 return (0);
1394 }
1395
1396 struct node_host *
gen_dynnode(struct node_host * h,sa_family_t af)1397 gen_dynnode(struct node_host *h, sa_family_t af)
1398 {
1399 struct node_host *n;
1400
1401 if (h->addr.type != PF_ADDR_DYNIFTL)
1402 return (NULL);
1403
1404 if ((n = calloc(1, sizeof(*n))) == NULL)
1405 return (NULL);
1406 bcopy(h, n, sizeof(*n));
1407 n->ifname = NULL;
1408 n->next = NULL;
1409 n->tail = NULL;
1410
1411 /* fix up netmask */
1412 if (af == AF_INET && unmask(&n->addr.v.a.mask) > 32)
1413 set_ipmask(n, 32);
1414
1415 return (n);
1416 }
1417
1418 /* interface lookup routines */
1419
1420 static struct node_host *iftab;
1421
1422 /*
1423 * Retrieve the list of groups this interface is a member of and make sure
1424 * each group is in the group map.
1425 */
1426 static void
ifa_add_groups_to_map(char * ifa_name)1427 ifa_add_groups_to_map(char *ifa_name)
1428 {
1429 int s, len;
1430 struct ifgroupreq ifgr;
1431 struct ifg_req *ifg;
1432
1433 s = get_query_socket();
1434
1435 /* Get size of group list for this interface */
1436 memset(&ifgr, 0, sizeof(ifgr));
1437 strlcpy(ifgr.ifgr_name, ifa_name, IFNAMSIZ);
1438 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1439 err(1, "SIOCGIFGROUP");
1440
1441 /* Retrieve group list for this interface */
1442 len = ifgr.ifgr_len;
1443 ifgr.ifgr_groups =
1444 (struct ifg_req *)calloc(len / sizeof(struct ifg_req),
1445 sizeof(struct ifg_req));
1446 if (ifgr.ifgr_groups == NULL)
1447 err(1, "calloc");
1448 if (ioctl(s, SIOCGIFGROUP, (caddr_t)&ifgr) == -1)
1449 err(1, "SIOCGIFGROUP");
1450
1451 ifg = ifgr.ifgr_groups;
1452 for (; ifg && len >= sizeof(struct ifg_req); ifg++) {
1453 len -= sizeof(struct ifg_req);
1454 if (strcmp(ifg->ifgrq_group, "all")) {
1455 ENTRY item;
1456 ENTRY *ret_item;
1457 int *answer;
1458
1459 item.key = ifg->ifgrq_group;
1460 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0) {
1461 struct ifgroupreq ifgr2;
1462
1463 /* Don't know the answer yet */
1464 if ((answer = malloc(sizeof(int))) == NULL)
1465 err(1, "malloc");
1466
1467 bzero(&ifgr2, sizeof(ifgr2));
1468 strlcpy(ifgr2.ifgr_name, ifg->ifgrq_group,
1469 sizeof(ifgr2.ifgr_name));
1470 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr2) == 0)
1471 *answer = ifgr2.ifgr_len;
1472 else
1473 *answer = 0;
1474
1475 item.key = strdup(ifg->ifgrq_group);
1476 item.data = answer;
1477 if (hsearch_r(item, ENTER, &ret_item,
1478 &isgroup_map) == 0)
1479 err(1, "interface group query response"
1480 " map insert");
1481 }
1482 }
1483 }
1484 free(ifgr.ifgr_groups);
1485 }
1486
1487 void
ifa_load(void)1488 ifa_load(void)
1489 {
1490 struct ifaddrs *ifap, *ifa;
1491 struct node_host *n = NULL, *h = NULL;
1492
1493 if (getifaddrs(&ifap) < 0)
1494 err(1, "getifaddrs");
1495
1496 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1497 if (ifa->ifa_addr == NULL ||
1498 !(ifa->ifa_addr->sa_family == AF_INET ||
1499 ifa->ifa_addr->sa_family == AF_INET6 ||
1500 ifa->ifa_addr->sa_family == AF_LINK))
1501 continue;
1502 n = calloc(1, sizeof(struct node_host));
1503 if (n == NULL)
1504 err(1, "%s: calloc", __func__);
1505 n->af = ifa->ifa_addr->sa_family;
1506 n->ifa_flags = ifa->ifa_flags;
1507 #ifdef __KAME__
1508 if (n->af == AF_INET6 &&
1509 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1510 ifa->ifa_addr)->sin6_addr) &&
1511 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1512 0) {
1513 struct sockaddr_in6 *sin6;
1514
1515 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1516 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1517 sin6->sin6_addr.s6_addr[3];
1518 sin6->sin6_addr.s6_addr[2] = 0;
1519 sin6->sin6_addr.s6_addr[3] = 0;
1520 }
1521 #endif
1522 n->ifindex = 0;
1523 if (n->af == AF_LINK) {
1524 n->ifindex = ((struct sockaddr_dl *)
1525 ifa->ifa_addr)->sdl_index;
1526 ifa_add_groups_to_map(ifa->ifa_name);
1527 } else {
1528 copy_satopfaddr(&n->addr.v.a.addr, ifa->ifa_addr);
1529 ifa->ifa_netmask->sa_family = ifa->ifa_addr->sa_family;
1530 copy_satopfaddr(&n->addr.v.a.mask, ifa->ifa_netmask);
1531 if (ifa->ifa_broadaddr != NULL) {
1532 ifa->ifa_broadaddr->sa_family = ifa->ifa_addr->sa_family;
1533 copy_satopfaddr(&n->bcast, ifa->ifa_broadaddr);
1534 }
1535 if (ifa->ifa_dstaddr != NULL) {
1536 ifa->ifa_dstaddr->sa_family = ifa->ifa_addr->sa_family;
1537 copy_satopfaddr(&n->peer, ifa->ifa_dstaddr);
1538 }
1539 if (n->af == AF_INET6)
1540 n->ifindex = ((struct sockaddr_in6 *)
1541 ifa->ifa_addr) ->sin6_scope_id;
1542 }
1543 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1544 err(1, "%s: strdup", __func__);
1545 n->next = NULL;
1546 n->tail = n;
1547 if (h == NULL)
1548 h = n;
1549 else {
1550 h->tail->next = n;
1551 h->tail = n;
1552 }
1553 }
1554
1555 iftab = h;
1556 freeifaddrs(ifap);
1557 }
1558
1559 static int
get_socket_domain(void)1560 get_socket_domain(void)
1561 {
1562 int sdom;
1563
1564 sdom = AF_UNSPEC;
1565 #ifdef WITH_INET6
1566 if (sdom == AF_UNSPEC && feature_present("inet6"))
1567 sdom = AF_INET6;
1568 #endif
1569 #ifdef WITH_INET
1570 if (sdom == AF_UNSPEC && feature_present("inet"))
1571 sdom = AF_INET;
1572 #endif
1573 if (sdom == AF_UNSPEC)
1574 sdom = AF_LINK;
1575
1576 return (sdom);
1577 }
1578
1579 int
get_query_socket(void)1580 get_query_socket(void)
1581 {
1582 static int s = -1;
1583
1584 if (s == -1) {
1585 if ((s = socket(get_socket_domain(), SOCK_DGRAM, 0)) == -1)
1586 err(1, "socket");
1587 }
1588
1589 return (s);
1590 }
1591
1592 /*
1593 * Returns the response len if the name is a group, otherwise returns 0.
1594 */
1595 static int
is_a_group(char * name)1596 is_a_group(char *name)
1597 {
1598 ENTRY item;
1599 ENTRY *ret_item;
1600
1601 item.key = name;
1602 if (hsearch_r(item, FIND, &ret_item, &isgroup_map) == 0)
1603 return (0);
1604
1605 return (*(int *)ret_item->data);
1606 }
1607
1608 unsigned int
ifa_nametoindex(const char * ifa_name)1609 ifa_nametoindex(const char *ifa_name)
1610 {
1611 struct node_host *p;
1612
1613 for (p = iftab; p; p = p->next) {
1614 if (p->af == AF_LINK && strcmp(p->ifname, ifa_name) == 0)
1615 return (p->ifindex);
1616 }
1617 errno = ENXIO;
1618 return (0);
1619 }
1620
1621 char *
ifa_indextoname(unsigned int ifindex,char * ifa_name)1622 ifa_indextoname(unsigned int ifindex, char *ifa_name)
1623 {
1624 struct node_host *p;
1625
1626 for (p = iftab; p; p = p->next) {
1627 if (p->af == AF_LINK && ifindex == p->ifindex) {
1628 strlcpy(ifa_name, p->ifname, IFNAMSIZ);
1629 return (ifa_name);
1630 }
1631 }
1632 errno = ENXIO;
1633 return (NULL);
1634 }
1635
1636 struct node_host *
ifa_exists(char * ifa_name)1637 ifa_exists(char *ifa_name)
1638 {
1639 struct node_host *n;
1640
1641 if (iftab == NULL)
1642 ifa_load();
1643
1644 /* check whether this is a group */
1645 if (is_a_group(ifa_name)) {
1646 /* fake a node_host */
1647 if ((n = calloc(1, sizeof(*n))) == NULL)
1648 err(1, "calloc");
1649 if ((n->ifname = strdup(ifa_name)) == NULL)
1650 err(1, "strdup");
1651 return (n);
1652 }
1653
1654 for (n = iftab; n; n = n->next) {
1655 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1656 return (n);
1657 }
1658
1659 return (NULL);
1660 }
1661
1662 struct node_host *
ifa_grouplookup(char * ifa_name,int flags)1663 ifa_grouplookup(char *ifa_name, int flags)
1664 {
1665 struct ifg_req *ifg;
1666 struct ifgroupreq ifgr;
1667 int s, len;
1668 struct node_host *n, *h = NULL;
1669
1670 s = get_query_socket();
1671 len = is_a_group(ifa_name);
1672 if (len == 0)
1673 return (NULL);
1674 bzero(&ifgr, sizeof(ifgr));
1675 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1676 ifgr.ifgr_len = len;
1677 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1678 err(1, "calloc");
1679 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1680 err(1, "SIOCGIFGMEMB");
1681
1682 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1683 ifg++) {
1684 len -= sizeof(struct ifg_req);
1685 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1686 continue;
1687 if (h == NULL)
1688 h = n;
1689 else {
1690 h->tail->next = n;
1691 h->tail = n->tail;
1692 }
1693 }
1694 free(ifgr.ifgr_groups);
1695
1696 return (h);
1697 }
1698
1699 struct node_host *
ifa_lookup(char * ifa_name,int flags)1700 ifa_lookup(char *ifa_name, int flags)
1701 {
1702 struct node_host *p = NULL, *h = NULL, *n = NULL;
1703 int got4 = 0, got6 = 0;
1704 const char *last_if = NULL;
1705
1706 /* first load iftab and isgroup_map */
1707 if (iftab == NULL)
1708 ifa_load();
1709
1710 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1711 return (h);
1712
1713 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1714 ifa_name = NULL;
1715
1716 for (p = iftab; p; p = p->next) {
1717 if (ifa_skip_if(ifa_name, p))
1718 continue;
1719 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1720 continue;
1721 if ((flags & PFI_AFLAG_BROADCAST) &&
1722 !(p->ifa_flags & IFF_BROADCAST))
1723 continue;
1724 if ((flags & PFI_AFLAG_BROADCAST) && p->bcast.v4.s_addr == 0)
1725 continue;
1726 if ((flags & PFI_AFLAG_PEER) &&
1727 !(p->ifa_flags & IFF_POINTOPOINT))
1728 continue;
1729 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1730 continue;
1731 if (last_if == NULL || strcmp(last_if, p->ifname))
1732 got4 = got6 = 0;
1733 last_if = p->ifname;
1734 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1735 continue;
1736 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1737 IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1738 continue;
1739 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1740 continue;
1741 if (p->af == AF_INET)
1742 got4 = 1;
1743 else
1744 got6 = 1;
1745 n = calloc(1, sizeof(struct node_host));
1746 if (n == NULL)
1747 err(1, "%s: calloc", __func__);
1748 n->af = p->af;
1749 if (flags & PFI_AFLAG_BROADCAST)
1750 memcpy(&n->addr.v.a.addr, &p->bcast,
1751 sizeof(struct pf_addr));
1752 else if (flags & PFI_AFLAG_PEER)
1753 memcpy(&n->addr.v.a.addr, &p->peer,
1754 sizeof(struct pf_addr));
1755 else
1756 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1757 sizeof(struct pf_addr));
1758 if (flags & PFI_AFLAG_NETWORK)
1759 set_ipmask(n, unmask(&p->addr.v.a.mask));
1760 else
1761 set_ipmask(n, -1);
1762 n->ifindex = p->ifindex;
1763 n->ifname = strdup(p->ifname);
1764
1765 n->next = NULL;
1766 n->tail = n;
1767 if (h == NULL)
1768 h = n;
1769 else {
1770 h->tail->next = n;
1771 h->tail = n;
1772 }
1773 }
1774 return (h);
1775 }
1776
1777 int
ifa_skip_if(const char * filter,struct node_host * p)1778 ifa_skip_if(const char *filter, struct node_host *p)
1779 {
1780 int n;
1781
1782 if (p->af != AF_INET && p->af != AF_INET6)
1783 return (1);
1784 if (filter == NULL || !*filter)
1785 return (0);
1786 if (!strcmp(p->ifname, filter))
1787 return (0); /* exact match */
1788 n = strlen(filter);
1789 if (n < 1 || n >= IFNAMSIZ)
1790 return (1); /* sanity check */
1791 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1792 return (1); /* only do exact match in that case */
1793 if (strncmp(p->ifname, filter, n))
1794 return (1); /* prefix doesn't match */
1795 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1796 }
1797
1798
1799 struct node_host *
host(const char * s,int opts)1800 host(const char *s, int opts)
1801 {
1802 struct node_host *h = NULL;
1803 int mask = -1;
1804 char *p, *ps;
1805 const char *errstr;
1806
1807 if ((p = strchr(s, '/')) != NULL) {
1808 mask = strtonum(p+1, 0, 128, &errstr);
1809 if (errstr) {
1810 fprintf(stderr, "netmask is %s: %s\n", errstr, p);
1811 goto error;
1812 }
1813 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1814 err(1, "%s: malloc", __func__);
1815 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1816 } else {
1817 if ((ps = strdup(s)) == NULL)
1818 err(1, "%s: strdup", __func__);
1819 }
1820
1821 if ((h = host_ip(ps, mask)) == NULL &&
1822 (h = host_if(ps, mask)) == NULL &&
1823 (h = host_dns(ps, mask, (opts & PF_OPT_NODNS))) == NULL) {
1824 fprintf(stderr, "no IP address found for %s\n", s);
1825 goto error;
1826 }
1827
1828 error:
1829 free(ps);
1830 return (h);
1831 }
1832
1833 struct node_host *
host_if(const char * s,int mask)1834 host_if(const char *s, int mask)
1835 {
1836 struct node_host *n, *h = NULL;
1837 char *p, *ps;
1838 int flags = 0;
1839
1840 if ((ps = strdup(s)) == NULL)
1841 err(1, "host_if: strdup");
1842 while ((p = strrchr(ps, ':')) != NULL) {
1843 if (!strcmp(p+1, "network"))
1844 flags |= PFI_AFLAG_NETWORK;
1845 else if (!strcmp(p+1, "broadcast"))
1846 flags |= PFI_AFLAG_BROADCAST;
1847 else if (!strcmp(p+1, "peer"))
1848 flags |= PFI_AFLAG_PEER;
1849 else if (!strcmp(p+1, "0"))
1850 flags |= PFI_AFLAG_NOALIAS;
1851 else
1852 goto error;
1853 *p = '\0';
1854 }
1855 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1856 fprintf(stderr, "illegal combination of interface modifiers\n");
1857 goto error;
1858 }
1859 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1860 fprintf(stderr, "network or broadcast lookup, but "
1861 "extra netmask given\n");
1862 goto error;
1863 }
1864 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1865 /* interface with this name exists */
1866 h = ifa_lookup(ps, flags);
1867 if (mask > -1)
1868 for (n = h; n != NULL; n = n->next)
1869 set_ipmask(n, mask);
1870 }
1871
1872 error:
1873 free(ps);
1874 return (h);
1875 }
1876
1877 struct node_host *
host_ip(const char * s,int mask)1878 host_ip(const char *s, int mask)
1879 {
1880 struct addrinfo hints, *res;
1881 struct node_host *h = NULL;
1882
1883 h = calloc(1, sizeof(*h));
1884 if (h == NULL)
1885 err(1, "%s: calloc", __func__);
1886 if (mask != -1) {
1887 /* Try to parse 10/8 */
1888 h->af = AF_INET;
1889 if (inet_net_pton(AF_INET, s, &h->addr.v.a.addr.v4,
1890 sizeof(h->addr.v.a.addr.v4)) != -1)
1891 goto out;
1892 }
1893
1894 memset(&hints, 0, sizeof(hints));
1895 hints.ai_family = AF_UNSPEC;
1896 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1897 hints.ai_flags = AI_NUMERICHOST;
1898 if (getaddrinfo(s, NULL, &hints, &res) == 0) {
1899 h->af = res->ai_family;
1900 copy_satopfaddr(&h->addr.v.a.addr, res->ai_addr);
1901 if (h->af == AF_INET6)
1902 h->ifindex =
1903 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1904 freeaddrinfo(res);
1905 } else {
1906 free(h);
1907 return (NULL);
1908 }
1909 out:
1910 set_ipmask(h, mask);
1911 h->ifname = NULL;
1912 h->next = NULL;
1913 h->tail = h;
1914
1915 return (h);
1916 }
1917
1918 struct node_host *
host_dns(const char * s,int mask,int numeric)1919 host_dns(const char *s, int mask, int numeric)
1920 {
1921 struct addrinfo hints, *res0, *res;
1922 struct node_host *n, *h = NULL;
1923 int noalias = 0, got4 = 0, got6 = 0;
1924 char *p, *ps;
1925
1926 if ((ps = strdup(s)) == NULL)
1927 err(1, "host_dns: strdup");
1928 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1929 noalias = 1;
1930 *p = '\0';
1931 }
1932 memset(&hints, 0, sizeof(hints));
1933 hints.ai_family = PF_UNSPEC;
1934 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1935 if (numeric)
1936 hints.ai_flags = AI_NUMERICHOST;
1937 if (getaddrinfo(ps, NULL, &hints, &res0) != 0)
1938 goto error;
1939
1940 for (res = res0; res; res = res->ai_next) {
1941 if (res->ai_family != AF_INET &&
1942 res->ai_family != AF_INET6)
1943 continue;
1944 if (noalias) {
1945 if (res->ai_family == AF_INET) {
1946 if (got4)
1947 continue;
1948 got4 = 1;
1949 } else {
1950 if (got6)
1951 continue;
1952 got6 = 1;
1953 }
1954 }
1955 n = calloc(1, sizeof(struct node_host));
1956 if (n == NULL)
1957 err(1, "host_dns: calloc");
1958 n->ifname = NULL;
1959 n->af = res->ai_family;
1960 copy_satopfaddr(&n->addr.v.a.addr, res->ai_addr);
1961 if (res->ai_family == AF_INET6)
1962 n->ifindex =
1963 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1964 set_ipmask(n, mask);
1965 n->next = NULL;
1966 n->tail = n;
1967 if (h == NULL)
1968 h = n;
1969 else {
1970 h->tail->next = n;
1971 h->tail = n;
1972 }
1973 }
1974 freeaddrinfo(res0);
1975 error:
1976 free(ps);
1977
1978 return (h);
1979 }
1980
1981 /*
1982 * convert a hostname to a list of addresses and put them in the given buffer.
1983 * test:
1984 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1985 */
1986 int
append_addr(struct pfr_buffer * b,char * s,int test,int opts)1987 append_addr(struct pfr_buffer *b, char *s, int test, int opts)
1988 {
1989 char *r;
1990 struct node_host *h, *n;
1991 int rv, not = 0;
1992
1993 for (r = s; *r == '!'; r++)
1994 not = !not;
1995 if ((n = host(r, opts)) == NULL) {
1996 errno = 0;
1997 return (-1);
1998 }
1999 rv = append_addr_host(b, n, test, not);
2000 do {
2001 h = n;
2002 n = n->next;
2003 free(h);
2004 } while (n != NULL);
2005 return (rv);
2006 }
2007
2008 /*
2009 * same as previous function, but with a pre-parsed input and the ability
2010 * to "negate" the result. Does not free the node_host list.
2011 * not:
2012 * setting it to 1 is equivalent to adding "!" in front of parameter s.
2013 */
2014 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)2015 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
2016 {
2017 int bits;
2018 struct pfr_addr addr;
2019
2020 do {
2021 bzero(&addr, sizeof(addr));
2022 addr.pfra_not = n->not ^ not;
2023 addr.pfra_af = n->af;
2024 addr.pfra_net = unmask(&n->addr.v.a.mask);
2025 switch (n->af) {
2026 case AF_INET:
2027 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
2028 bits = 32;
2029 break;
2030 case AF_INET6:
2031 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
2032 sizeof(struct in6_addr));
2033 bits = 128;
2034 break;
2035 default:
2036 errno = EINVAL;
2037 return (-1);
2038 }
2039 if ((test && (not || addr.pfra_net != bits)) ||
2040 addr.pfra_net > bits) {
2041 errno = EINVAL;
2042 return (-1);
2043 }
2044 if (pfr_buf_add(b, &addr))
2045 return (-1);
2046 } while ((n = n->next) != NULL);
2047
2048 return (0);
2049 }
2050
2051 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)2052 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
2053 {
2054 struct pfioc_trans_e trans;
2055
2056 bzero(&trans, sizeof(trans));
2057 trans.rs_num = rs_num;
2058 if (strlcpy(trans.anchor, anchor,
2059 sizeof(trans.anchor)) >= sizeof(trans.anchor))
2060 errx(1, "pfctl_add_trans: strlcpy");
2061
2062 return pfr_buf_add(buf, &trans);
2063 }
2064
2065 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)2066 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
2067 {
2068 struct pfioc_trans_e *p;
2069
2070 PFRB_FOREACH(p, buf)
2071 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
2072 return (p->ticket);
2073 errx(1, "pfctl_get_ticket: assertion failed");
2074 }
2075
2076 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)2077 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
2078 {
2079 struct pfioc_trans trans;
2080
2081 bzero(&trans, sizeof(trans));
2082 trans.size = buf->pfrb_size - from;
2083 trans.esize = sizeof(struct pfioc_trans_e);
2084 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
2085 return ioctl(dev, cmd, &trans);
2086 }
2087