1 /** $MirOS: src/sbin/pfctl/pfctl_parser.c,v 1.4 2005/12/20 19:41:11 tg Exp $ */
2 /* $OpenBSD: pfctl_parser.c,v 1.198 2004/05/07 16:54:20 henning Exp $ */
3
4 /*
5 * Copyright (c) 2001 Daniel Hartmeier
6 * Copyright (c) 2002,2003 Henning Brauer
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * - Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * - Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
24 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
30 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 */
34
35 #include <sys/types.h>
36 #include <sys/ioctl.h>
37 #include <sys/socket.h>
38 #include <net/if.h>
39 #include <netinet/in.h>
40 #include <netinet/in_systm.h>
41 #include <netinet/ip.h>
42 #include <netinet/ip_icmp.h>
43 #include <netinet/icmp6.h>
44 #include <net/pfvar.h>
45 #include <arpa/inet.h>
46
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50 #include <ctype.h>
51 #include <netdb.h>
52 #include <stdarg.h>
53 #include <errno.h>
54 #include <err.h>
55 #include <ifaddrs.h>
56
57 #include "pfctl_parser.h"
58 #include "pfctl.h"
59
60 __RCSID("$MirOS: src/sbin/pfctl/pfctl_parser.c,v 1.4 2005/12/20 19:41:11 tg Exp $");
61
62 void print_op (u_int8_t, const char *, const char *);
63 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
64 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
65 void print_flags (u_int8_t);
66 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
67 struct pf_rule_addr *, u_int8_t, u_int8_t, int);
68 int ifa_skip_if(const char *filter, struct node_host *p);
69
70 struct node_host *host_if(const char *, int);
71 struct node_host *host_v4(const char *, int);
72 struct node_host *host_v6(const char *, int);
73 struct node_host *host_dns(const char *, int, int);
74
75 const char *tcpflags = "FSRPAUEW";
76
77 static const struct icmptypeent icmp_type[] = {
78 { "echoreq", ICMP_ECHO },
79 { "echorep", ICMP_ECHOREPLY },
80 { "unreach", ICMP_UNREACH },
81 { "squench", ICMP_SOURCEQUENCH },
82 { "redir", ICMP_REDIRECT },
83 { "althost", ICMP_ALTHOSTADDR },
84 { "routeradv", ICMP_ROUTERADVERT },
85 { "routersol", ICMP_ROUTERSOLICIT },
86 { "timex", ICMP_TIMXCEED },
87 { "paramprob", ICMP_PARAMPROB },
88 { "timereq", ICMP_TSTAMP },
89 { "timerep", ICMP_TSTAMPREPLY },
90 { "inforeq", ICMP_IREQ },
91 { "inforep", ICMP_IREQREPLY },
92 { "maskreq", ICMP_MASKREQ },
93 { "maskrep", ICMP_MASKREPLY },
94 { "trace", ICMP_TRACEROUTE },
95 { "dataconv", ICMP_DATACONVERR },
96 { "mobredir", ICMP_MOBILE_REDIRECT },
97 { "ipv6-where", ICMP_IPV6_WHEREAREYOU },
98 { "ipv6-here", ICMP_IPV6_IAMHERE },
99 { "mobregreq", ICMP_MOBILE_REGREQUEST },
100 { "mobregrep", ICMP_MOBILE_REGREPLY },
101 { "skip", ICMP_SKIP },
102 { "photuris", ICMP_PHOTURIS }
103 };
104
105 static const struct icmptypeent icmp6_type[] = {
106 { "unreach", ICMP6_DST_UNREACH },
107 { "toobig", ICMP6_PACKET_TOO_BIG },
108 { "timex", ICMP6_TIME_EXCEEDED },
109 { "paramprob", ICMP6_PARAM_PROB },
110 { "echoreq", ICMP6_ECHO_REQUEST },
111 { "echorep", ICMP6_ECHO_REPLY },
112 { "groupqry", ICMP6_MEMBERSHIP_QUERY },
113 { "listqry", MLD_LISTENER_QUERY },
114 { "grouprep", ICMP6_MEMBERSHIP_REPORT },
115 { "listenrep", MLD_LISTENER_REPORT },
116 { "groupterm", ICMP6_MEMBERSHIP_REDUCTION },
117 { "listendone", MLD_LISTENER_DONE },
118 { "routersol", ND_ROUTER_SOLICIT },
119 { "routeradv", ND_ROUTER_ADVERT },
120 { "neighbrsol", ND_NEIGHBOR_SOLICIT },
121 { "neighbradv", ND_NEIGHBOR_ADVERT },
122 { "redir", ND_REDIRECT },
123 { "routrrenum", ICMP6_ROUTER_RENUMBERING },
124 { "wrureq", ICMP6_WRUREQUEST },
125 { "wrurep", ICMP6_WRUREPLY },
126 { "fqdnreq", ICMP6_FQDN_QUERY },
127 { "fqdnrep", ICMP6_FQDN_REPLY },
128 { "niqry", ICMP6_NI_QUERY },
129 { "nirep", ICMP6_NI_REPLY },
130 { "mtraceresp", MLD_MTRACE_RESP },
131 { "mtrace", MLD_MTRACE }
132 };
133
134 static const struct icmpcodeent icmp_code[] = {
135 { "net-unr", ICMP_UNREACH, ICMP_UNREACH_NET },
136 { "host-unr", ICMP_UNREACH, ICMP_UNREACH_HOST },
137 { "proto-unr", ICMP_UNREACH, ICMP_UNREACH_PROTOCOL },
138 { "port-unr", ICMP_UNREACH, ICMP_UNREACH_PORT },
139 { "needfrag", ICMP_UNREACH, ICMP_UNREACH_NEEDFRAG },
140 { "srcfail", ICMP_UNREACH, ICMP_UNREACH_SRCFAIL },
141 { "net-unk", ICMP_UNREACH, ICMP_UNREACH_NET_UNKNOWN },
142 { "host-unk", ICMP_UNREACH, ICMP_UNREACH_HOST_UNKNOWN },
143 { "isolate", ICMP_UNREACH, ICMP_UNREACH_ISOLATED },
144 { "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
145 { "host-prohib", ICMP_UNREACH, ICMP_UNREACH_HOST_PROHIB },
146 { "net-tos", ICMP_UNREACH, ICMP_UNREACH_TOSNET },
147 { "host-tos", ICMP_UNREACH, ICMP_UNREACH_TOSHOST },
148 { "filter-prohib", ICMP_UNREACH, ICMP_UNREACH_FILTER_PROHIB },
149 { "host-preced", ICMP_UNREACH, ICMP_UNREACH_HOST_PRECEDENCE },
150 { "cutoff-preced", ICMP_UNREACH, ICMP_UNREACH_PRECEDENCE_CUTOFF },
151 { "redir-net", ICMP_REDIRECT, ICMP_REDIRECT_NET },
152 { "redir-host", ICMP_REDIRECT, ICMP_REDIRECT_HOST },
153 { "redir-tos-net", ICMP_REDIRECT, ICMP_REDIRECT_TOSNET },
154 { "redir-tos-host", ICMP_REDIRECT, ICMP_REDIRECT_TOSHOST },
155 { "normal-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NORMAL },
156 { "common-adv", ICMP_ROUTERADVERT, ICMP_ROUTERADVERT_NOROUTE_COMMON },
157 { "transit", ICMP_TIMXCEED, ICMP_TIMXCEED_INTRANS },
158 { "reassemb", ICMP_TIMXCEED, ICMP_TIMXCEED_REASS },
159 { "badhead", ICMP_PARAMPROB, ICMP_PARAMPROB_ERRATPTR },
160 { "optmiss", ICMP_PARAMPROB, ICMP_PARAMPROB_OPTABSENT },
161 { "badlen", ICMP_PARAMPROB, ICMP_PARAMPROB_LENGTH },
162 { "unknown-ind", ICMP_PHOTURIS, ICMP_PHOTURIS_UNKNOWN_INDEX },
163 { "auth-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_AUTH_FAILED },
164 { "decrypt-fail", ICMP_PHOTURIS, ICMP_PHOTURIS_DECRYPT_FAILED }
165 };
166
167 static const struct icmpcodeent icmp6_code[] = {
168 { "admin-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADMIN },
169 { "noroute-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOROUTE },
170 { "notnbr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOTNEIGHBOR },
171 { "beyond-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_BEYONDSCOPE },
172 { "addr-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_ADDR },
173 { "port-unr", ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT },
174 { "transit", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_TRANSIT },
175 { "reassemb", ICMP6_TIME_EXCEEDED, ICMP6_TIME_EXCEED_REASSEMBLY },
176 { "badhead", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER },
177 { "nxthdr", ICMP6_PARAM_PROB, ICMP6_PARAMPROB_NEXTHEADER },
178 { "redironlink", ND_REDIRECT, ND_REDIRECT_ONLINK },
179 { "redirrouter", ND_REDIRECT, ND_REDIRECT_ROUTER }
180 };
181
182 const struct pf_timeout pf_timeouts[] = {
183 { "tcp.first", PFTM_TCP_FIRST_PACKET },
184 { "tcp.opening", PFTM_TCP_OPENING },
185 { "tcp.established", PFTM_TCP_ESTABLISHED },
186 { "tcp.closing", PFTM_TCP_CLOSING },
187 { "tcp.finwait", PFTM_TCP_FIN_WAIT },
188 { "tcp.closed", PFTM_TCP_CLOSED },
189 { "tcp.tsdiff", PFTM_TS_DIFF },
190 { "udp.first", PFTM_UDP_FIRST_PACKET },
191 { "udp.single", PFTM_UDP_SINGLE },
192 { "udp.multiple", PFTM_UDP_MULTIPLE },
193 { "icmp.first", PFTM_ICMP_FIRST_PACKET },
194 { "icmp.error", PFTM_ICMP_ERROR_REPLY },
195 { "other.first", PFTM_OTHER_FIRST_PACKET },
196 { "other.single", PFTM_OTHER_SINGLE },
197 { "other.multiple", PFTM_OTHER_MULTIPLE },
198 { "frag", PFTM_FRAG },
199 { "interval", PFTM_INTERVAL },
200 { "adaptive.start", PFTM_ADAPTIVE_START },
201 { "adaptive.end", PFTM_ADAPTIVE_END },
202 { "src.track", PFTM_SRC_NODE },
203 { NULL, 0 }
204 };
205
206 const struct icmptypeent *
geticmptypebynumber(u_int8_t type,sa_family_t af)207 geticmptypebynumber(u_int8_t type, sa_family_t af)
208 {
209 unsigned int i;
210
211 if (af != AF_INET6) {
212 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
213 i++) {
214 if (type == icmp_type[i].type)
215 return (&icmp_type[i]);
216 }
217 } else {
218 for (i=0; i < (sizeof (icmp6_type) /
219 sizeof(icmp6_type[0])); i++) {
220 if (type == icmp6_type[i].type)
221 return (&icmp6_type[i]);
222 }
223 }
224 return (NULL);
225 }
226
227 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)228 geticmptypebyname(char *w, sa_family_t af)
229 {
230 unsigned int i;
231
232 if (af != AF_INET6) {
233 for (i=0; i < (sizeof (icmp_type) / sizeof(icmp_type[0]));
234 i++) {
235 if (!strcmp(w, icmp_type[i].name))
236 return (&icmp_type[i]);
237 }
238 } else {
239 for (i=0; i < (sizeof (icmp6_type) /
240 sizeof(icmp6_type[0])); i++) {
241 if (!strcmp(w, icmp6_type[i].name))
242 return (&icmp6_type[i]);
243 }
244 }
245 return (NULL);
246 }
247
248 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)249 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
250 {
251 unsigned int i;
252
253 if (af != AF_INET6) {
254 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
255 i++) {
256 if (type == icmp_code[i].type &&
257 code == icmp_code[i].code)
258 return (&icmp_code[i]);
259 }
260 } else {
261 for (i=0; i < (sizeof (icmp6_code) /
262 sizeof(icmp6_code[0])); i++) {
263 if (type == icmp6_code[i].type &&
264 code == icmp6_code[i].code)
265 return (&icmp6_code[i]);
266 }
267 }
268 return (NULL);
269 }
270
271 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)272 geticmpcodebyname(u_long type, char *w, sa_family_t af)
273 {
274 unsigned int i;
275
276 if (af != AF_INET6) {
277 for (i=0; i < (sizeof (icmp_code) / sizeof(icmp_code[0]));
278 i++) {
279 if (type == icmp_code[i].type &&
280 !strcmp(w, icmp_code[i].name))
281 return (&icmp_code[i]);
282 }
283 } else {
284 for (i=0; i < (sizeof (icmp6_code) /
285 sizeof(icmp6_code[0])); i++) {
286 if (type == icmp6_code[i].type &&
287 !strcmp(w, icmp6_code[i].name))
288 return (&icmp6_code[i]);
289 }
290 }
291 return (NULL);
292 }
293
294 void
print_op(u_int8_t op,const char * a1,const char * a2)295 print_op(u_int8_t op, const char *a1, const char *a2)
296 {
297 if (op == PF_OP_IRG)
298 printf(" %s >< %s", a1, a2);
299 else if (op == PF_OP_XRG)
300 printf(" %s <> %s", a1, a2);
301 else if (op == PF_OP_EQ)
302 printf(" = %s", a1);
303 else if (op == PF_OP_NE)
304 printf(" != %s", a1);
305 else if (op == PF_OP_LT)
306 printf(" < %s", a1);
307 else if (op == PF_OP_LE)
308 printf(" <= %s", a1);
309 else if (op == PF_OP_GT)
310 printf(" > %s", a1);
311 else if (op == PF_OP_GE)
312 printf(" >= %s", a1);
313 else if (op == PF_OP_RRG)
314 printf(" %s:%s", a1, a2);
315 }
316
317 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto)318 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
319 {
320 char a1[6], a2[6];
321 struct servent *s;
322
323 s = getservbyport(p1, proto);
324 p1 = ntohs(p1);
325 p2 = ntohs(p2);
326 snprintf(a1, sizeof(a1), "%u", p1);
327 snprintf(a2, sizeof(a2), "%u", p2);
328 printf(" port");
329 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
330 print_op(op, s->s_name, a2);
331 else
332 print_op(op, a1, a2);
333 }
334
335 void
print_ugid(u_int8_t op,unsigned u1,unsigned u2,const char * t,unsigned umax)336 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
337 {
338 char a1[11], a2[11];
339
340 snprintf(a1, sizeof(a1), "%u", u1);
341 snprintf(a2, sizeof(a2), "%u", u2);
342 printf(" %s", t);
343 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
344 print_op(op, "unknown", a2);
345 else
346 print_op(op, a1, a2);
347 }
348
349 void
print_flags(u_int8_t f)350 print_flags(u_int8_t f)
351 {
352 int i;
353
354 for (i = 0; tcpflags[i]; ++i)
355 if (f & (1 << i))
356 printf("%c", tcpflags[i]);
357 }
358
359 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)360 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
361 sa_family_t af, u_int8_t proto, int verbose)
362 {
363 char buf[PF_OSFP_LEN*3];
364 if (src->addr.type == PF_ADDR_ADDRMASK &&
365 dst->addr.type == PF_ADDR_ADDRMASK &&
366 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
367 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
368 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
369 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
370 !src->not && !dst->not &&
371 !src->port_op && !dst->port_op &&
372 osfp == PF_OSFP_ANY)
373 printf(" all");
374 else {
375 printf(" from ");
376 if (src->not)
377 printf("! ");
378 print_addr(&src->addr, af, verbose);
379 if (src->port_op)
380 print_port(src->port_op, src->port[0],
381 src->port[1],
382 proto == IPPROTO_TCP ? "tcp" : "udp");
383 if (osfp != PF_OSFP_ANY)
384 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
385 sizeof(buf)));
386
387 printf(" to ");
388 if (dst->not)
389 printf("! ");
390 print_addr(&dst->addr, af, verbose);
391 if (dst->port_op)
392 print_port(dst->port_op, dst->port[0],
393 dst->port[1],
394 proto == IPPROTO_TCP ? "tcp" : "udp");
395 }
396 }
397
398 void
print_pool(struct pf_pool * pool,u_int16_t p1,u_int16_t p2,sa_family_t af,int id)399 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
400 sa_family_t af, int id)
401 {
402 struct pf_pooladdr *pooladdr;
403
404 if ((TAILQ_FIRST(&pool->list) != NULL) &&
405 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
406 printf("{ ");
407 TAILQ_FOREACH(pooladdr, &pool->list, entries){
408 switch (id) {
409 case PF_NAT:
410 case PF_RDR:
411 case PF_BINAT:
412 print_addr(&pooladdr->addr, af, 0);
413 break;
414 case PF_PASS:
415 if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
416 printf("%s", pooladdr->ifname);
417 else {
418 printf("(%s ", pooladdr->ifname);
419 print_addr(&pooladdr->addr, af, 0);
420 printf(")");
421 }
422 break;
423 default:
424 break;
425 }
426 if (TAILQ_NEXT(pooladdr, entries) != NULL)
427 printf(", ");
428 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
429 printf(" }");
430 }
431 switch (id) {
432 case PF_NAT:
433 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
434 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
435 if (p1 == p2)
436 printf(" port %u", p1);
437 else
438 printf(" port %u:%u", p1, p2);
439 }
440 break;
441 case PF_RDR:
442 if (p1) {
443 printf(" port %u", p1);
444 if (p2 && (p2 != p1))
445 printf(":%u", p2);
446 }
447 break;
448 default:
449 break;
450 }
451 switch (pool->opts & PF_POOL_TYPEMASK) {
452 case PF_POOL_NONE:
453 break;
454 case PF_POOL_BITMASK:
455 printf(" bitmask");
456 break;
457 case PF_POOL_RANDOM:
458 printf(" random");
459 break;
460 case PF_POOL_SRCHASH:
461 printf(" source-hash 0x%08x%08x%08x%08x",
462 pool->key.key32[0], pool->key.key32[1],
463 pool->key.key32[2], pool->key.key32[3]);
464 break;
465 case PF_POOL_ROUNDROBIN:
466 printf(" round-robin");
467 break;
468 }
469 if (pool->opts & PF_POOL_STICKYADDR)
470 printf(" sticky-address");
471 if (id == PF_NAT && p1 == 0 && p2 == 0)
472 printf(" static-port");
473 }
474
475 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
476 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
477 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
478
479 void
print_status(struct pf_status * s,int opts)480 print_status(struct pf_status *s, int opts)
481 {
482 char statline[80], *running;
483 time_t runtime;
484 int i;
485
486 runtime = time(NULL) - s->since;
487 running = s->running ? "Enabled" : "Disabled";
488
489 if (s->since) {
490 unsigned sec, min, hrs, day = runtime;
491
492 sec = day % 60;
493 day /= 60;
494 min = day % 60;
495 day /= 60;
496 hrs = day % 24;
497 day /= 24;
498 snprintf(statline, sizeof(statline),
499 "Status: %s for %u days %.2u:%.2u:%.2u",
500 running, day, hrs, min, sec);
501 } else
502 snprintf(statline, sizeof(statline), "Status: %s", running);
503 printf("%-44s", statline);
504 switch (s->debug) {
505 case PF_DEBUG_NONE:
506 printf("%15s\n\n", "Debug: None");
507 break;
508 case PF_DEBUG_URGENT:
509 printf("%15s\n\n", "Debug: Urgent");
510 break;
511 case PF_DEBUG_MISC:
512 printf("%15s\n\n", "Debug: Misc");
513 break;
514 case PF_DEBUG_NOISY:
515 printf("%15s\n\n", "Debug: Loud");
516 break;
517 }
518 printf("Hostid: 0x%08x\n\n", ntohl(s->hostid));
519 if (s->ifname[0] != 0) {
520 printf("Interface Stats for %-16s %5s %16s\n",
521 s->ifname, "IPv4", "IPv6");
522 printf(" %-25s %14llu %16llu\n", "Bytes In",
523 (unsigned long long)s->bcounters[0][0],
524 (unsigned long long)s->bcounters[1][0]);
525 printf(" %-25s %14llu %16llu\n", "Bytes Out",
526 (unsigned long long)s->bcounters[0][1],
527 (unsigned long long)s->bcounters[1][1]);
528 printf(" Packets In\n");
529 printf(" %-23s %14llu %16llu\n", "Passed",
530 (unsigned long long)s->pcounters[0][0][PF_PASS],
531 (unsigned long long)s->pcounters[1][0][PF_PASS]);
532 printf(" %-23s %14llu %16llu\n", "Blocked",
533 (unsigned long long)s->pcounters[0][0][PF_DROP],
534 (unsigned long long)s->pcounters[1][0][PF_DROP]);
535 printf(" Packets Out\n");
536 printf(" %-23s %14llu %16llu\n", "Passed",
537 (unsigned long long)s->pcounters[0][1][PF_PASS],
538 (unsigned long long)s->pcounters[1][1][PF_PASS]);
539 printf(" %-23s %14llu %16llu\n\n", "Blocked",
540 (unsigned long long)s->pcounters[0][1][PF_DROP],
541 (unsigned long long)s->pcounters[1][1][PF_DROP]);
542 }
543 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
544 printf(" %-25s %14u %14s\n", "current entries", s->states, "");
545 for (i = 0; i < FCNT_MAX; i++) {
546 printf(" %-25s %14llu ", pf_fcounters[i],
547 (unsigned long long)s->fcounters[i]);
548 if (runtime > 0)
549 printf("%14.1f/s\n",
550 (double)s->fcounters[i] / (double)runtime);
551 else
552 printf("%14s\n", "");
553 }
554 if (opts & PF_OPT_VERBOSE) {
555 printf("Source Tracking Table\n");
556 printf(" %-25s %14u %14s\n", "current entries",
557 s->src_nodes, "");
558 for (i = 0; i < SCNT_MAX; i++) {
559 printf(" %-25s %14lld ", pf_scounters[i],
560 s->scounters[i]);
561 if (runtime > 0)
562 printf("%14.1f/s\n",
563 (double)s->scounters[i] / (double)runtime);
564 else
565 printf("%14s\n", "");
566 }
567 }
568 printf("Counters\n");
569 for (i = 0; i < PFRES_MAX; i++) {
570 printf(" %-25s %14llu ", pf_reasons[i],
571 (unsigned long long)s->counters[i]);
572 if (runtime > 0)
573 printf("%14.1f/s\n",
574 (double)s->counters[i] / (double)runtime);
575 else
576 printf("%14s\n", "");
577 }
578 }
579
580 void
print_src_node(struct pf_src_node * sn,int opts)581 print_src_node(struct pf_src_node *sn, int opts)
582 {
583 struct pf_addr_wrap aw;
584 int min, sec;
585
586 memset(&aw, 0, sizeof(aw));
587 if (sn->af == AF_INET)
588 aw.v.a.mask.addr32[0] = 0xffffffff;
589 else
590 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
591
592 aw.v.a.addr = sn->addr;
593 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
594 printf(" -> ");
595 aw.v.a.addr = sn->raddr;
596 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
597 printf(" (%d states)\n", sn->states);
598 if (opts & PF_OPT_VERBOSE) {
599 sec = sn->creation % 60;
600 sn->creation /= 60;
601 min = sn->creation % 60;
602 sn->creation /= 60;
603 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec);
604 if (sn->states == 0) {
605 sec = sn->expire % 60;
606 sn->expire /= 60;
607 min = sn->expire % 60;
608 sn->expire /= 60;
609 printf(", expires in %.2u:%.2u:%.2u",
610 sn->expire, min, sec);
611 }
612 printf(", %u pkts, %u bytes", sn->packets, sn->bytes);
613 switch (sn->ruletype) {
614 case PF_NAT:
615 if (sn->rule.nr != -1)
616 printf(", nat rule %u", sn->rule.nr);
617 break;
618 case PF_RDR:
619 if (sn->rule.nr != -1)
620 printf(", rdr rule %u", sn->rule.nr);
621 break;
622 case PF_PASS:
623 if (sn->rule.nr != -1)
624 printf(", filter rule %u", sn->rule.nr);
625 break;
626 }
627 printf("\n");
628 }
629 }
630
631 void
print_rule(struct pf_rule * r,int verbose)632 print_rule(struct pf_rule *r, int verbose)
633 {
634 static const char *actiontypes[] = { "pass", "block", "scrub", "nat",
635 "no nat", "binat", "no binat", "rdr", "no rdr" };
636 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
637 "nat-anchor", "nat-anchor", "binat-anchor", "binat-anchor",
638 "rdr-anchor", "rdr-anchor" };
639 int i, opts;
640
641 if (verbose)
642 printf("@%d ", r->nr);
643 if (r->action > PF_NORDR)
644 printf("action(%d)", r->action);
645 else if (r->anchorname[0])
646 printf("%s %s", anchortypes[r->action], r->anchorname);
647 else {
648 printf("%s", actiontypes[r->action]);
649 if (r->natpass)
650 printf(" pass");
651 }
652 if (r->action == PF_DROP) {
653 if (r->rule_flag & PFRULE_RETURN)
654 printf(" return");
655 else if (r->rule_flag & PFRULE_RETURNRST) {
656 if (!r->return_ttl)
657 printf(" return-rst");
658 else
659 printf(" return-rst(ttl %d)", r->return_ttl);
660 } else if (r->rule_flag & PFRULE_RETURNICMP) {
661 const struct icmpcodeent *ic, *ic6;
662
663 ic = geticmpcodebynumber(r->return_icmp >> 8,
664 r->return_icmp & 255, AF_INET);
665 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
666 r->return_icmp6 & 255, AF_INET6);
667
668 switch (r->af) {
669 case AF_INET:
670 printf(" return-icmp");
671 if (ic == NULL)
672 printf("(%u)", r->return_icmp & 255);
673 else
674 printf("(%s)", ic->name);
675 break;
676 case AF_INET6:
677 printf(" return-icmp6");
678 if (ic6 == NULL)
679 printf("(%u)", r->return_icmp6 & 255);
680 else
681 printf("(%s)", ic6->name);
682 break;
683 default:
684 printf(" return-icmp");
685 if (ic == NULL)
686 printf("(%u, ", r->return_icmp & 255);
687 else
688 printf("(%s, ", ic->name);
689 if (ic6 == NULL)
690 printf("%u)", r->return_icmp6 & 255);
691 else
692 printf("%s)", ic6->name);
693 break;
694 }
695 } else
696 printf(" drop");
697 }
698 if (r->direction == PF_IN)
699 printf(" in");
700 else if (r->direction == PF_OUT)
701 printf(" out");
702 if (r->log == 1)
703 printf(" log");
704 else if (r->log == 2)
705 printf(" log-all");
706 if (r->quick)
707 printf(" quick");
708 if (r->ifname[0]) {
709 if (r->ifnot)
710 printf(" on ! %s", r->ifname);
711 else
712 printf(" on %s", r->ifname);
713 }
714 if (r->rt) {
715 if (r->rt == PF_ROUTETO)
716 printf(" route-to");
717 else if (r->rt == PF_REPLYTO)
718 printf(" reply-to");
719 else if (r->rt == PF_DUPTO)
720 printf(" dup-to");
721 else if (r->rt == PF_FASTROUTE)
722 printf(" fastroute");
723 if (r->rt != PF_FASTROUTE) {
724 printf(" ");
725 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
726 }
727 }
728 if (r->af) {
729 if (r->af == AF_INET)
730 printf(" inet");
731 else
732 printf(" inet6");
733 }
734 if (r->proto) {
735 struct protoent *p;
736
737 if ((p = getprotobynumber(r->proto)) != NULL)
738 printf(" proto %s", p->p_name);
739 else
740 printf(" proto %u", r->proto);
741 }
742 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
743 verbose);
744 if (r->uid.op)
745 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
746 UID_MAX);
747 if (r->gid.op)
748 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
749 GID_MAX);
750 if (r->flags || r->flagset) {
751 printf(" flags ");
752 print_flags(r->flags);
753 printf("/");
754 print_flags(r->flagset);
755 }
756 if (r->type) {
757 const struct icmptypeent *it;
758
759 it = geticmptypebynumber(r->type-1, r->af);
760 if (r->af != AF_INET6)
761 printf(" icmp-type");
762 else
763 printf(" icmp6-type");
764 if (it != NULL)
765 printf(" %s", it->name);
766 else
767 printf(" %u", r->type-1);
768 if (r->code) {
769 const struct icmpcodeent *ic;
770
771 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
772 if (ic != NULL)
773 printf(" code %s", ic->name);
774 else
775 printf(" code %u", r->code-1);
776 }
777 }
778 if (r->tos)
779 printf(" tos 0x%2.2x", r->tos);
780 if (r->keep_state == PF_STATE_NORMAL)
781 printf(" keep state");
782 else if (r->keep_state == PF_STATE_MODULATE)
783 printf(" modulate state");
784 else if (r->keep_state == PF_STATE_SYNPROXY)
785 printf(" synproxy state");
786 if (r->prob) {
787 char buf[20];
788
789 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
790 for (i = strlen(buf)-1; i > 0; i--) {
791 if (buf[i] == '0')
792 buf[i] = '\0';
793 else {
794 if (buf[i] == '.')
795 buf[i] = '\0';
796 break;
797 }
798 }
799 printf(" probability %s%%", buf);
800 }
801 opts = 0;
802 if (r->max_states || r->max_src_nodes || r->max_src_states)
803 opts = 1;
804 if (r->rule_flag & PFRULE_NOSYNC)
805 opts = 1;
806 if (r->rule_flag & PFRULE_SRCTRACK)
807 opts = 1;
808 if (r->rule_flag & (PFRULE_IFBOUND | PFRULE_GRBOUND))
809 opts = 1;
810 for (i = 0; !opts && i < PFTM_MAX; ++i)
811 if (r->timeout[i])
812 opts = 1;
813 if (opts) {
814 printf(" (");
815 if (r->max_states) {
816 printf("max %u", r->max_states);
817 opts = 0;
818 }
819 if (r->rule_flag & PFRULE_NOSYNC) {
820 if (!opts)
821 printf(", ");
822 printf("no-sync");
823 opts = 0;
824 }
825 if (r->rule_flag & PFRULE_SRCTRACK) {
826 if (!opts)
827 printf(", ");
828 printf("source-track");
829 if (r->rule_flag & PFRULE_RULESRCTRACK)
830 printf(" rule");
831 else
832 printf(" global");
833 opts = 0;
834 }
835 if (r->max_src_states) {
836 if (!opts)
837 printf(", ");
838 printf("max-src-states %u", r->max_src_states);
839 opts = 0;
840 }
841 if (r->max_src_nodes) {
842 if (!opts)
843 printf(", ");
844 printf("max-src-nodes %u", r->max_src_nodes);
845 opts = 0;
846 }
847 if (r->rule_flag & PFRULE_IFBOUND) {
848 if (!opts)
849 printf(", ");
850 printf("if-bound");
851 opts = 0;
852 }
853 if (r->rule_flag & PFRULE_GRBOUND) {
854 if (!opts)
855 printf(", ");
856 printf("group-bound");
857 opts = 0;
858 }
859 for (i = 0; i < PFTM_MAX; ++i)
860 if (r->timeout[i]) {
861 if (!opts)
862 printf(", ");
863 opts = 0;
864 printf("%s %u", pf_timeouts[i].name,
865 r->timeout[i]);
866 }
867 printf(")");
868 }
869 if (r->rule_flag & PFRULE_FRAGMENT)
870 printf(" fragment");
871 if (r->rule_flag & PFRULE_NODF)
872 printf(" no-df");
873 if (r->rule_flag & PFRULE_RANDOMID)
874 printf(" random-id");
875 if (r->min_ttl)
876 printf(" min-ttl %d", r->min_ttl);
877 if (r->max_mss)
878 printf(" max-mss %d", r->max_mss);
879 if (r->allow_opts)
880 printf(" allow-opts");
881 if (r->action == PF_SCRUB) {
882 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
883 printf(" reassemble tcp");
884
885 if (r->rule_flag & PFRULE_FRAGDROP)
886 printf(" fragment drop-ovl");
887 else if (r->rule_flag & PFRULE_FRAGCROP)
888 printf(" fragment crop");
889 else
890 printf(" fragment reassemble");
891 }
892 if (r->label[0])
893 printf(" label \"%s\"", r->label);
894 if (r->qname[0] && r->pqname[0])
895 printf(" queue(%s, %s)", r->qname, r->pqname);
896 else if (r->qname[0])
897 printf(" queue %s", r->qname);
898 if (r->tagname[0])
899 printf(" tag %s", r->tagname);
900 if (r->match_tagname[0]) {
901 if (r->match_tag_not)
902 printf(" !");
903 printf(" tagged %s", r->match_tagname);
904 }
905 if (!r->anchorname[0] && (r->action == PF_NAT ||
906 r->action == PF_BINAT || r->action == PF_RDR)) {
907 printf(" -> ");
908 print_pool(&r->rpool, r->rpool.proxy_port[0],
909 r->rpool.proxy_port[1], r->af, r->action);
910 }
911 printf("\n");
912 }
913
914 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)915 print_tabledef(const char *name, int flags, int addrs,
916 struct node_tinithead *nodes)
917 {
918 struct node_tinit *ti, *nti;
919 struct node_host *h;
920
921 printf("table <%s>", name);
922 if (flags & PFR_TFLAG_CONST)
923 printf(" const");
924 if (flags & PFR_TFLAG_PERSIST)
925 printf(" persist");
926 SIMPLEQ_FOREACH(ti, nodes, entries) {
927 if (ti->file) {
928 printf(" file \"%s\"", ti->file);
929 continue;
930 }
931 printf(" {");
932 for (;;) {
933 for (h = ti->host; h != NULL; h = h->next) {
934 printf(h->not ? " !" : " ");
935 print_addr(&h->addr, h->af, 0);
936 }
937 nti = SIMPLEQ_NEXT(ti, entries);
938 if (nti != NULL && nti->file == NULL)
939 ti = nti; /* merge lists */
940 else
941 break;
942 }
943 printf(" }");
944 }
945 if (addrs && SIMPLEQ_EMPTY(nodes))
946 printf(" { }");
947 printf("\n");
948 }
949
950 int
parse_flags(char * s)951 parse_flags(char *s)
952 {
953 char *p, *q;
954 u_int8_t f = 0;
955
956 for (p = s; *p; p++) {
957 if ((q = strchr(tcpflags, *p)) == NULL)
958 return -1;
959 else
960 f |= 1 << (q - tcpflags);
961 }
962 return (f ? f : PF_TH_ALL);
963 }
964
965 void
set_ipmask(struct node_host * h,u_int8_t b)966 set_ipmask(struct node_host *h, u_int8_t b)
967 {
968 struct pf_addr *m, *n;
969 int i, j = 0;
970
971 m = &h->addr.v.a.mask;
972
973 for (i = 0; i < 4; i++)
974 m->addr32[i] = 0;
975
976 while (b >= 32) {
977 m->addr32[j++] = 0xffffffff;
978 b -= 32;
979 }
980 for (i = 31; i > 31-b; --i)
981 m->addr32[j] |= (1 << i);
982 if (b)
983 m->addr32[j] = htonl(m->addr32[j]);
984
985 /* Mask off bits of the address that will never be used. */
986 n = &h->addr.v.a.addr;
987 if (h->addr.type == PF_ADDR_ADDRMASK)
988 for (i = 0; i < 4; i++)
989 n->addr32[i] = n->addr32[i] & m->addr32[i];
990 }
991
992 int
check_netmask(struct node_host * h,sa_family_t af)993 check_netmask(struct node_host *h, sa_family_t af)
994 {
995 struct node_host *n = NULL;
996 struct pf_addr *m;
997
998 for (n = h; n != NULL; n = n->next) {
999 if (h->addr.type == PF_ADDR_TABLE)
1000 continue;
1001 m = &h->addr.v.a.mask;
1002 /* netmasks > 32 bit are invalid on v4 */
1003 if (af == AF_INET &&
1004 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1005 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1006 unmask(m, AF_INET6));
1007 return (1);
1008 }
1009 }
1010 return (0);
1011 }
1012
1013 /* interface lookup routines */
1014
1015 struct node_host *iftab;
1016
1017 void
ifa_load(void)1018 ifa_load(void)
1019 {
1020 struct ifaddrs *ifap, *ifa;
1021 struct node_host *n = NULL, *h = NULL;
1022 struct pfr_buffer b;
1023 struct pfi_if *p;
1024
1025 if (getifaddrs(&ifap) < 0)
1026 err(1, "getifaddrs");
1027
1028 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1029 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1030 ifa->ifa_addr->sa_family == AF_INET6 ||
1031 ifa->ifa_addr->sa_family == AF_LINK))
1032 continue;
1033 n = calloc(1, sizeof(struct node_host));
1034 if (n == NULL)
1035 err(1, "address: calloc");
1036 n->af = ifa->ifa_addr->sa_family;
1037 n->ifa_flags = ifa->ifa_flags;
1038 #ifdef __KAME__
1039 if (n->af == AF_INET6 &&
1040 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1041 ifa->ifa_addr)->sin6_addr) &&
1042 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1043 0) {
1044 struct sockaddr_in6 *sin6;
1045
1046 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1047 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1048 sin6->sin6_addr.s6_addr[3];
1049 sin6->sin6_addr.s6_addr[2] = 0;
1050 sin6->sin6_addr.s6_addr[3] = 0;
1051 }
1052 #endif
1053 n->ifindex = 0;
1054 if (n->af == AF_INET) {
1055 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1056 ifa->ifa_addr)->sin_addr.s_addr,
1057 sizeof(struct in_addr));
1058 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1059 ifa->ifa_netmask)->sin_addr.s_addr,
1060 sizeof(struct in_addr));
1061 if (ifa->ifa_broadaddr != NULL)
1062 memcpy(&n->bcast, &((struct sockaddr_in *)
1063 ifa->ifa_broadaddr)->sin_addr.s_addr,
1064 sizeof(struct in_addr));
1065 if (ifa->ifa_dstaddr != NULL)
1066 memcpy(&n->peer, &((struct sockaddr_in *)
1067 ifa->ifa_dstaddr)->sin_addr.s_addr,
1068 sizeof(struct in_addr));
1069 } else if (n->af == AF_INET6) {
1070 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1071 ifa->ifa_addr)->sin6_addr.s6_addr,
1072 sizeof(struct in6_addr));
1073 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1074 ifa->ifa_netmask)->sin6_addr.s6_addr,
1075 sizeof(struct in6_addr));
1076 if (ifa->ifa_broadaddr != NULL)
1077 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1078 ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1079 sizeof(struct in6_addr));
1080 if (ifa->ifa_dstaddr != NULL)
1081 memcpy(&n->peer, &((struct sockaddr_in6 *)
1082 ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1083 sizeof(struct in6_addr));
1084 n->ifindex = ((struct sockaddr_in6 *)
1085 ifa->ifa_addr)->sin6_scope_id;
1086 }
1087 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1088 err(1, "ifa_load: strdup");
1089 n->next = NULL;
1090 n->tail = n;
1091 if (h == NULL)
1092 h = n;
1093 else {
1094 h->tail->next = n;
1095 h->tail = n;
1096 }
1097 }
1098
1099 /* add interface groups, including clonable and dynamic stuff */
1100 bzero(&b, sizeof(b));
1101 b.pfrb_type = PFRB_IFACES;
1102 for (;;) {
1103 if (pfr_buf_grow(&b, b.pfrb_size))
1104 err(1, "ifa_load: pfr_buf_grow");
1105 b.pfrb_size = b.pfrb_msize;
1106 if (pfi_get_ifaces(NULL, b.pfrb_caddr, &b.pfrb_size,
1107 PFI_FLAG_GROUP))
1108 err(1, "ifa_load: pfi_get_ifaces");
1109 if (b.pfrb_size <= b.pfrb_msize)
1110 break;
1111 }
1112 PFRB_FOREACH(p, &b) {
1113 n = calloc(1, sizeof(struct node_host));
1114 if (n == NULL)
1115 err(1, "address: calloc");
1116 n->af = AF_LINK;
1117 n->ifa_flags = PF_IFA_FLAG_GROUP;
1118 if (p->pfif_flags & PFI_IFLAG_DYNAMIC)
1119 n->ifa_flags |= PF_IFA_FLAG_DYNAMIC;
1120 if (p->pfif_flags & PFI_IFLAG_CLONABLE)
1121 n->ifa_flags |= PF_IFA_FLAG_CLONABLE;
1122 if (!strcmp(p->pfif_name, "lo"))
1123 n->ifa_flags |= IFF_LOOPBACK;
1124 if ((n->ifname = strdup(p->pfif_name)) == NULL)
1125 err(1, "ifa_load: strdup");
1126 n->next = NULL;
1127 n->tail = n;
1128 if (h == NULL)
1129 h = n;
1130 else {
1131 h->tail->next = n;
1132 h->tail = n;
1133 }
1134 }
1135
1136 iftab = h;
1137 freeifaddrs(ifap);
1138 }
1139
1140 struct node_host *
ifa_exists(const char * ifa_name,int group_ok)1141 ifa_exists(const char *ifa_name, int group_ok)
1142 {
1143 struct node_host *n;
1144 char *p, buf[IFNAMSIZ];
1145 int group;
1146
1147 group = !isdigit(ifa_name[strlen(ifa_name) - 1]);
1148 if (group && !group_ok)
1149 return (NULL);
1150 if (iftab == NULL)
1151 ifa_load();
1152
1153 for (n = iftab; n; n = n->next) {
1154 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1155 return (n);
1156 }
1157 if (!group) {
1158 /* look for clonable and/or dynamic interface */
1159 strlcpy(buf, ifa_name, sizeof(buf));
1160 for (p = buf + strlen(buf) - 1; p > buf && isdigit(*p); p--)
1161 *p = '\0';
1162 for (n = iftab; n != NULL; n = n->next)
1163 if (n->af == AF_LINK &&
1164 !strncmp(n->ifname, buf, IFNAMSIZ))
1165 break;
1166 if (n != NULL && n->ifa_flags &
1167 (PF_IFA_FLAG_DYNAMIC | PF_IFA_FLAG_CLONABLE))
1168 return (n); /* XXX */
1169 }
1170 return (NULL);
1171 }
1172
1173 struct node_host *
ifa_lookup(const char * ifa_name,int flags)1174 ifa_lookup(const char *ifa_name, int flags)
1175 {
1176 struct node_host *p = NULL, *h = NULL, *n = NULL;
1177 int got4 = 0, got6 = 0;
1178 const char *last_if = NULL;
1179
1180 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1181 ifa_name = NULL;
1182
1183 if (iftab == NULL)
1184 ifa_load();
1185
1186 for (p = iftab; p; p = p->next) {
1187 if (ifa_skip_if(ifa_name, p))
1188 continue;
1189 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1190 continue;
1191 if ((flags & PFI_AFLAG_BROADCAST) &&
1192 !(p->ifa_flags & IFF_BROADCAST))
1193 continue;
1194 if ((flags & PFI_AFLAG_PEER) &&
1195 !(p->ifa_flags & IFF_POINTOPOINT))
1196 continue;
1197 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1198 continue;
1199 if (last_if == NULL || strcmp(last_if, p->ifname))
1200 got4 = got6 = 0;
1201 last_if = p->ifname;
1202 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1203 continue;
1204 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1205 continue;
1206 if (p->af == AF_INET)
1207 got4 = 1;
1208 else
1209 got6 = 1;
1210 n = calloc(1, sizeof(struct node_host));
1211 if (n == NULL)
1212 err(1, "address: calloc");
1213 n->af = p->af;
1214 if (flags & PFI_AFLAG_BROADCAST)
1215 memcpy(&n->addr.v.a.addr, &p->bcast,
1216 sizeof(struct pf_addr));
1217 else if (flags & PFI_AFLAG_PEER)
1218 memcpy(&n->addr.v.a.addr, &p->peer,
1219 sizeof(struct pf_addr));
1220 else
1221 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1222 sizeof(struct pf_addr));
1223 if (flags & PFI_AFLAG_NETWORK)
1224 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1225 else {
1226 if (n->af == AF_INET) {
1227 if (p->ifa_flags & IFF_LOOPBACK &&
1228 p->ifa_flags & IFF_LINK1)
1229 memcpy(&n->addr.v.a.mask,
1230 &p->addr.v.a.mask,
1231 sizeof(struct pf_addr));
1232 else
1233 set_ipmask(n, 32);
1234 } else
1235 set_ipmask(n, 128);
1236 }
1237 n->ifindex = p->ifindex;
1238
1239 n->next = NULL;
1240 n->tail = n;
1241 if (h == NULL)
1242 h = n;
1243 else {
1244 h->tail->next = n;
1245 h->tail = n;
1246 }
1247 }
1248 return (h);
1249 }
1250
1251 int
ifa_skip_if(const char * filter,struct node_host * p)1252 ifa_skip_if(const char *filter, struct node_host *p)
1253 {
1254 int n;
1255
1256 if (p->af != AF_INET && p->af != AF_INET6)
1257 return (1);
1258 if (filter == NULL || !*filter)
1259 return (0);
1260 if (!strcmp(p->ifname, filter))
1261 return (0); /* exact match */
1262 n = strlen(filter);
1263 if (n < 1 || n >= IFNAMSIZ)
1264 return (1); /* sanity check */
1265 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1266 return (1); /* only do exact match in that case */
1267 if (strncmp(p->ifname, filter, n))
1268 return (1); /* prefix doesn't match */
1269 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1270 }
1271
1272
1273 struct node_host *
host(const char * s)1274 host(const char *s)
1275 {
1276 struct node_host *h = NULL;
1277 int mask, v4mask, v6mask, cont = 1;
1278 char *p, *q, *ps;
1279
1280 if ((p = strrchr(s, '/')) != NULL) {
1281 mask = strtol(p+1, &q, 0);
1282 if (!q || *q || mask > 128 || q == (p+1)) {
1283 fprintf(stderr, "invalid netmask\n");
1284 return (NULL);
1285 }
1286 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1287 err(1, "host: malloc");
1288 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1289 v4mask = v6mask = mask;
1290 } else {
1291 if ((ps = strdup(s)) == NULL)
1292 err(1, "host: strdup");
1293 v4mask = 32;
1294 v6mask = 128;
1295 mask = -1;
1296 }
1297
1298 /* interface with this name exists? */
1299 if (cont && (h = host_if(ps, mask)) != NULL)
1300 cont = 0;
1301
1302 /* IPv4 address? */
1303 if (cont && (h = host_v4(s, mask)) != NULL)
1304 cont = 0;
1305
1306 /* IPv6 address? */
1307 if (cont && (h = host_v6(ps, v6mask)) != NULL)
1308 cont = 0;
1309
1310 /* dns lookup */
1311 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1312 cont = 0;
1313 free(ps);
1314
1315 if (h == NULL || cont == 1) {
1316 fprintf(stderr, "no IP address found for %s\n", s);
1317 return (NULL);
1318 }
1319 return (h);
1320 }
1321
1322 struct node_host *
host_if(const char * s,int mask)1323 host_if(const char *s, int mask)
1324 {
1325 struct node_host *n, *h = NULL;
1326 char *p, *ps;
1327 int flags = 0;
1328
1329 if ((ps = strdup(s)) == NULL)
1330 err(1, "host_if: strdup");
1331 while ((p = strrchr(ps, ':')) != NULL) {
1332 if (!strcmp(p+1, "network"))
1333 flags |= PFI_AFLAG_NETWORK;
1334 else if (!strcmp(p+1, "broadcast"))
1335 flags |= PFI_AFLAG_BROADCAST;
1336 else if (!strcmp(p+1, "peer"))
1337 flags |= PFI_AFLAG_PEER;
1338 else if (!strcmp(p+1, "0"))
1339 flags |= PFI_AFLAG_NOALIAS;
1340 else {
1341 free(ps);
1342 return (NULL);
1343 }
1344 *p = '\0';
1345 }
1346 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1347 fprintf(stderr, "illegal combination of interface modifiers\n");
1348 free(ps);
1349 return (NULL);
1350 }
1351 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1352 fprintf(stderr, "network or broadcast lookup, but "
1353 "extra netmask given\n");
1354 free(ps);
1355 return (NULL);
1356 }
1357 if (ifa_exists(ps, 1) || !strncmp(ps, "self", IFNAMSIZ)) {
1358 /* interface with this name exists */
1359 h = ifa_lookup(ps, flags);
1360 for (n = h; n != NULL && mask > -1; n = n->next)
1361 set_ipmask(n, mask);
1362 }
1363
1364 free(ps);
1365 return (h);
1366 }
1367
1368 struct node_host *
host_v4(const char * s,int mask)1369 host_v4(const char *s, int mask)
1370 {
1371 struct node_host *h = NULL;
1372 struct in_addr ina;
1373 int bits = 32;
1374
1375 memset(&ina, 0, sizeof(struct in_addr));
1376 if (strrchr(s, '/') != NULL) {
1377 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1378 return (NULL);
1379 } else {
1380 if (inet_pton(AF_INET, s, &ina) != 1)
1381 return (NULL);
1382 }
1383
1384 h = calloc(1, sizeof(struct node_host));
1385 if (h == NULL)
1386 err(1, "address: calloc");
1387 h->ifname = NULL;
1388 h->af = AF_INET;
1389 h->addr.v.a.addr.addr32[0] = ina.s_addr;
1390 set_ipmask(h, bits);
1391 h->next = NULL;
1392 h->tail = h;
1393
1394 return (h);
1395 }
1396
1397 struct node_host *
host_v6(const char * s,int mask)1398 host_v6(const char *s, int mask)
1399 {
1400 struct addrinfo hints, *res;
1401 struct node_host *h = NULL;
1402
1403 memset(&hints, 0, sizeof(hints));
1404 hints.ai_family = AF_INET6;
1405 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1406 hints.ai_flags = AI_NUMERICHOST;
1407 if (getaddrinfo(s, "0", &hints, &res) == 0) {
1408 h = calloc(1, sizeof(struct node_host));
1409 if (h == NULL)
1410 err(1, "address: calloc");
1411 h->ifname = NULL;
1412 h->af = AF_INET6;
1413 memcpy(&h->addr.v.a.addr,
1414 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1415 sizeof(h->addr.v.a.addr));
1416 h->ifindex =
1417 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1418 set_ipmask(h, mask);
1419 freeaddrinfo(res);
1420 h->next = NULL;
1421 h->tail = h;
1422 }
1423
1424 return (h);
1425 }
1426
1427 struct node_host *
host_dns(const char * s,int v4mask,int v6mask)1428 host_dns(const char *s, int v4mask, int v6mask)
1429 {
1430 struct addrinfo hints, *res0, *res;
1431 struct node_host *n, *h = NULL;
1432 int error, noalias = 0;
1433 int got4 = 0, got6 = 0;
1434 char *p, *ps;
1435
1436 if ((ps = strdup(s)) == NULL)
1437 err(1, "host_dns: strdup");
1438 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1439 noalias = 1;
1440 *p = '\0';
1441 }
1442 memset(&hints, 0, sizeof(hints));
1443 hints.ai_family = PF_UNSPEC;
1444 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1445 error = getaddrinfo(ps, NULL, &hints, &res0);
1446 if (error)
1447 return (h);
1448
1449 for (res = res0; res; res = res->ai_next) {
1450 if (res->ai_family != AF_INET &&
1451 res->ai_family != AF_INET6)
1452 continue;
1453 if (noalias) {
1454 if (res->ai_family == AF_INET) {
1455 if (got4)
1456 continue;
1457 got4 = 1;
1458 } else {
1459 if (got6)
1460 continue;
1461 got6 = 1;
1462 }
1463 }
1464 n = calloc(1, sizeof(struct node_host));
1465 if (n == NULL)
1466 err(1, "host_dns: calloc");
1467 n->ifname = NULL;
1468 n->af = res->ai_family;
1469 if (res->ai_family == AF_INET) {
1470 memcpy(&n->addr.v.a.addr,
1471 &((struct sockaddr_in *)
1472 res->ai_addr)->sin_addr.s_addr,
1473 sizeof(struct in_addr));
1474 set_ipmask(n, v4mask);
1475 } else {
1476 memcpy(&n->addr.v.a.addr,
1477 &((struct sockaddr_in6 *)
1478 res->ai_addr)->sin6_addr.s6_addr,
1479 sizeof(struct in6_addr));
1480 n->ifindex =
1481 ((struct sockaddr_in6 *)
1482 res->ai_addr)->sin6_scope_id;
1483 set_ipmask(n, v6mask);
1484 }
1485 n->next = NULL;
1486 n->tail = n;
1487 if (h == NULL)
1488 h = n;
1489 else {
1490 h->tail->next = n;
1491 h->tail = n;
1492 }
1493 }
1494 freeaddrinfo(res0);
1495 free(ps);
1496
1497 return (h);
1498 }
1499
1500 /*
1501 * convert a hostname to a list of addresses and put them in the given buffer.
1502 * test:
1503 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1504 */
1505 int
append_addr(struct pfr_buffer * b,char * s,int test)1506 append_addr(struct pfr_buffer *b, char *s, int test)
1507 {
1508 char *r;
1509 struct node_host *h, *n;
1510 int rv, not = 0;
1511
1512 for (r = s; *r == '!'; r++)
1513 not = !not;
1514 if ((n = host(r)) == NULL) {
1515 errno = 0;
1516 return (-1);
1517 }
1518 rv = append_addr_host(b, n, test, not);
1519 do {
1520 h = n;
1521 n = n->next;
1522 free(h);
1523 } while (n != NULL);
1524 return (rv);
1525 }
1526
1527 /*
1528 * same as previous function, but with a pre-parsed input and the ability
1529 * to "negate" the result. Does not free the node_host list.
1530 * not:
1531 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1532 */
1533 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1534 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1535 {
1536 int bits;
1537 struct pfr_addr addr;
1538
1539 do {
1540 bzero(&addr, sizeof(addr));
1541 addr.pfra_not = n->not ^ not;
1542 addr.pfra_af = n->af;
1543 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1544 switch (n->af) {
1545 case AF_INET:
1546 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1547 bits = 32;
1548 break;
1549 case AF_INET6:
1550 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1551 sizeof(struct in6_addr));
1552 bits = 128;
1553 break;
1554 default:
1555 errno = EINVAL;
1556 return (-1);
1557 }
1558 if ((test && (not || addr.pfra_net != bits)) ||
1559 addr.pfra_net > bits) {
1560 errno = EINVAL;
1561 return (-1);
1562 }
1563 if (pfr_buf_add(b, &addr))
1564 return (-1);
1565 } while ((n = n->next) != NULL);
1566
1567 return (0);
1568 }
1569
1570 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor,const char * ruleset)1571 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor,
1572 const char *ruleset)
1573 {
1574 struct pfioc_trans_e trans;
1575
1576 bzero(&trans, sizeof(trans));
1577 trans.rs_num = rs_num;
1578 if (strlcpy(trans.anchor, anchor,
1579 sizeof(trans.anchor)) >= sizeof(trans.anchor) ||
1580 strlcpy(trans.ruleset, ruleset,
1581 sizeof(trans.ruleset)) >= sizeof(trans.ruleset))
1582 errx(1, "pfctl_add_trans: strlcpy");
1583
1584 return pfr_buf_add(buf, &trans);
1585 }
1586
1587 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor,const char * ruleset)1588 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor,
1589 const char *ruleset)
1590 {
1591 struct pfioc_trans_e *p;
1592
1593 PFRB_FOREACH(p, buf)
1594 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor) &&
1595 !strcmp(ruleset, p->ruleset))
1596 return (p->ticket);
1597 errx(1, "pfctl_get_ticket: assertion failed");
1598 }
1599
1600 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)1601 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1602 {
1603 struct pfioc_trans trans;
1604
1605 bzero(&trans, sizeof(trans));
1606 trans.size = buf->pfrb_size - from;
1607 trans.esize = sizeof(struct pfioc_trans_e);
1608 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1609 return ioctl(dev, cmd, &trans);
1610 }
1611