1 /* $OpenBSD: pfctl_parser.c,v 1.240 2008/06/10 20:55:02 mcbride Exp $ */
2
3 /*
4 * Copyright (c) 2001 Daniel Hartmeier
5 * Copyright (c) 2002,2003 Henning Brauer
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * - Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * - Redistributions in binary form must reproduce the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer in the documentation and/or other materials provided
17 * with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 *
32 */
33
34 #include <sys/types.h>
35 #include <sys/ioctl.h>
36 #include <sys/socket.h>
37 #include <sys/param.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/pf/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 #include <unistd.h>
57
58 #include "pfctl_parser.h"
59 #include "pfctl.h"
60
61 void print_op (u_int8_t, const char *, const char *);
62 void print_port (u_int8_t, u_int16_t, u_int16_t, const char *);
63 void print_ugid (u_int8_t, unsigned, unsigned, const char *, unsigned);
64 void print_flags (u_int8_t);
65 void print_fromto(struct pf_rule_addr *, pf_osfp_t,
66 struct pf_rule_addr *, u_int8_t, u_int8_t, int);
67 int ifa_skip_if(const char *filter, struct node_host *p);
68
69 struct node_host *ifa_grouplookup(const char *, int);
70 struct node_host *host_if(const char *, int);
71 static struct node_host *host_v4(const char *);
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 < NELEM(icmp_type); i++) {
213 if (type == icmp_type[i].type)
214 return (&icmp_type[i]);
215 }
216 } else {
217 for (i=0; i < NELEM(icmp6_type); i++) {
218 if (type == icmp6_type[i].type)
219 return (&icmp6_type[i]);
220 }
221 }
222 return (NULL);
223 }
224
225 const struct icmptypeent *
geticmptypebyname(char * w,sa_family_t af)226 geticmptypebyname(char *w, sa_family_t af)
227 {
228 unsigned int i;
229
230 if (af != AF_INET6) {
231 for (i=0; i < NELEM(icmp_type); i++) {
232 if (!strcmp(w, icmp_type[i].name))
233 return (&icmp_type[i]);
234 }
235 } else {
236 for (i=0; i < NELEM(icmp6_type); i++) {
237 if (!strcmp(w, icmp6_type[i].name))
238 return (&icmp6_type[i]);
239 }
240 }
241 return (NULL);
242 }
243
244 const struct icmpcodeent *
geticmpcodebynumber(u_int8_t type,u_int8_t code,sa_family_t af)245 geticmpcodebynumber(u_int8_t type, u_int8_t code, sa_family_t af)
246 {
247 unsigned int i;
248
249 if (af != AF_INET6) {
250 for (i=0; i < NELEM(icmp_code); i++) {
251 if (type == icmp_code[i].type &&
252 code == icmp_code[i].code)
253 return (&icmp_code[i]);
254 }
255 } else {
256 for (i=0; i < NELEM(icmp6_code); i++) {
257 if (type == icmp6_code[i].type &&
258 code == icmp6_code[i].code)
259 return (&icmp6_code[i]);
260 }
261 }
262 return (NULL);
263 }
264
265 const struct icmpcodeent *
geticmpcodebyname(u_long type,char * w,sa_family_t af)266 geticmpcodebyname(u_long type, char *w, sa_family_t af)
267 {
268 unsigned int i;
269
270 if (af != AF_INET6) {
271 for (i=0; i < NELEM(icmp_code); i++) {
272 if (type == icmp_code[i].type &&
273 !strcmp(w, icmp_code[i].name))
274 return (&icmp_code[i]);
275 }
276 } else {
277 for (i=0; i < NELEM(icmp6_code); i++) {
278 if (type == icmp6_code[i].type &&
279 !strcmp(w, icmp6_code[i].name))
280 return (&icmp6_code[i]);
281 }
282 }
283 return (NULL);
284 }
285
286 void
print_op(u_int8_t op,const char * a1,const char * a2)287 print_op(u_int8_t op, const char *a1, const char *a2)
288 {
289 if (op == PF_OP_IRG)
290 printf(" %s >< %s", a1, a2);
291 else if (op == PF_OP_XRG)
292 printf(" %s <> %s", a1, a2);
293 else if (op == PF_OP_EQ)
294 printf(" = %s", a1);
295 else if (op == PF_OP_NE)
296 printf(" != %s", a1);
297 else if (op == PF_OP_LT)
298 printf(" < %s", a1);
299 else if (op == PF_OP_LE)
300 printf(" <= %s", a1);
301 else if (op == PF_OP_GT)
302 printf(" > %s", a1);
303 else if (op == PF_OP_GE)
304 printf(" >= %s", a1);
305 else if (op == PF_OP_RRG)
306 printf(" %s:%s", a1, a2);
307 }
308
309 void
print_port(u_int8_t op,u_int16_t p1,u_int16_t p2,const char * proto)310 print_port(u_int8_t op, u_int16_t p1, u_int16_t p2, const char *proto)
311 {
312 char a1[6], a2[6];
313 struct servent *s;
314
315 s = getservbyport(p1, proto);
316 p1 = ntohs(p1);
317 p2 = ntohs(p2);
318 snprintf(a1, sizeof(a1), "%u", p1);
319 snprintf(a2, sizeof(a2), "%u", p2);
320 printf(" port");
321 if (s != NULL && (op == PF_OP_EQ || op == PF_OP_NE))
322 print_op(op, s->s_name, a2);
323 else
324 print_op(op, a1, a2);
325 }
326
327 void
print_ugid(u_int8_t op,unsigned u1,unsigned u2,const char * t,unsigned umax)328 print_ugid(u_int8_t op, unsigned u1, unsigned u2, const char *t, unsigned umax)
329 {
330 char a1[11], a2[11];
331
332 snprintf(a1, sizeof(a1), "%u", u1);
333 snprintf(a2, sizeof(a2), "%u", u2);
334 printf(" %s", t);
335 if (u1 == umax && (op == PF_OP_EQ || op == PF_OP_NE))
336 print_op(op, "unknown", a2);
337 else
338 print_op(op, a1, a2);
339 }
340
341 void
print_flags(u_int8_t f)342 print_flags(u_int8_t f)
343 {
344 int i;
345
346 for (i = 0; tcpflags[i]; ++i)
347 if (f & (1 << i))
348 printf("%c", tcpflags[i]);
349 }
350
351 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)352 print_fromto(struct pf_rule_addr *src, pf_osfp_t osfp, struct pf_rule_addr *dst,
353 sa_family_t af, u_int8_t proto, int verbose)
354 {
355 char buf[PF_OSFP_LEN*3];
356 if (src->addr.type == PF_ADDR_ADDRMASK &&
357 dst->addr.type == PF_ADDR_ADDRMASK &&
358 PF_AZERO(&src->addr.v.a.addr, AF_INET6) &&
359 PF_AZERO(&src->addr.v.a.mask, AF_INET6) &&
360 PF_AZERO(&dst->addr.v.a.addr, AF_INET6) &&
361 PF_AZERO(&dst->addr.v.a.mask, AF_INET6) &&
362 !src->neg && !dst->neg &&
363 !src->port_op && !dst->port_op &&
364 osfp == PF_OSFP_ANY)
365 printf(" all");
366 else {
367 printf(" from ");
368 if (src->neg)
369 printf("! ");
370 print_addr(&src->addr, af, verbose);
371 if (src->port_op)
372 print_port(src->port_op, src->port[0],
373 src->port[1],
374 proto == IPPROTO_TCP ? "tcp" : "udp");
375 if (osfp != PF_OSFP_ANY)
376 printf(" os \"%s\"", pfctl_lookup_fingerprint(osfp, buf,
377 sizeof(buf)));
378
379 printf(" to ");
380 if (dst->neg)
381 printf("! ");
382 print_addr(&dst->addr, af, verbose);
383 if (dst->port_op)
384 print_port(dst->port_op, dst->port[0],
385 dst->port[1],
386 proto == IPPROTO_TCP ? "tcp" : "udp");
387 }
388 }
389
390 void
print_pool(struct pf_pool * pool,u_int16_t p1,u_int16_t p2,sa_family_t af,int id)391 print_pool(struct pf_pool *pool, u_int16_t p1, u_int16_t p2,
392 sa_family_t af, int id)
393 {
394 struct pf_pooladdr *pooladdr;
395
396 if ((TAILQ_FIRST(&pool->list) != NULL) &&
397 TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
398 printf("{ ");
399 TAILQ_FOREACH(pooladdr, &pool->list, entries){
400 switch (id) {
401 case PF_NAT:
402 case PF_RDR:
403 case PF_BINAT:
404 print_addr(&pooladdr->addr, af, 0);
405 break;
406 case PF_PASS:
407 if (PF_AZERO(&pooladdr->addr.v.a.addr, af))
408 printf("%s", pooladdr->ifname);
409 else {
410 printf("(%s ", pooladdr->ifname);
411 print_addr(&pooladdr->addr, af, 0);
412 printf(")");
413 }
414 break;
415 default:
416 break;
417 }
418 if (TAILQ_NEXT(pooladdr, entries) != NULL)
419 printf(", ");
420 else if (TAILQ_NEXT(TAILQ_FIRST(&pool->list), entries) != NULL)
421 printf(" }");
422 }
423 switch (id) {
424 case PF_NAT:
425 if ((p1 != PF_NAT_PROXY_PORT_LOW ||
426 p2 != PF_NAT_PROXY_PORT_HIGH) && (p1 != 0 || p2 != 0)) {
427 if (p1 == p2)
428 printf(" port %u", p1);
429 else
430 printf(" port %u:%u", p1, p2);
431 }
432 break;
433 case PF_RDR:
434 if (p1) {
435 printf(" port %u", p1);
436 if (p2 && (p2 != p1))
437 printf(":%u", p2);
438 }
439 break;
440 default:
441 break;
442 }
443 switch (pool->opts & PF_POOL_TYPEMASK) {
444 case PF_POOL_NONE:
445 break;
446 case PF_POOL_BITMASK:
447 printf(" bitmask");
448 break;
449 case PF_POOL_RANDOM:
450 printf(" random");
451 break;
452 case PF_POOL_SRCHASH:
453 printf(" source-hash 0x%08x%08x%08x%08x",
454 pool->key.key32[0], pool->key.key32[1],
455 pool->key.key32[2], pool->key.key32[3]);
456 break;
457 case PF_POOL_ROUNDROBIN:
458 printf(" round-robin");
459 break;
460 }
461 if (pool->opts & PF_POOL_STICKYADDR)
462 printf(" sticky-address");
463 if (id == PF_NAT && p1 == 0 && p2 == 0)
464 printf(" static-port");
465 }
466
467 const char *pf_reasons[PFRES_MAX+1] = PFRES_NAMES;
468 const char *pf_lcounters[LCNT_MAX+1] = LCNT_NAMES;
469 const char *pf_fcounters[FCNT_MAX+1] = FCNT_NAMES;
470 const char *pf_scounters[FCNT_MAX+1] = FCNT_NAMES;
471
472 void
print_status(struct pf_status * s,int opts)473 print_status(struct pf_status *s, int opts)
474 {
475 char statline[80];
476 const char *running;
477 time_t runtime;
478 int i;
479 char buf[PF_MD5_DIGEST_LENGTH * 2 + 1];
480 static const char hex[] = "0123456789abcdef";
481
482 runtime = time(NULL) - s->since;
483 running = s->running ? "Enabled" : "Disabled";
484
485 if (s->since) {
486 unsigned int sec, min, hrs, day = runtime;
487
488 sec = day % 60;
489 day /= 60;
490 min = day % 60;
491 day /= 60;
492 hrs = day % 24;
493 day /= 24;
494 snprintf(statline, sizeof(statline),
495 "Status: %s for %u days %.2u:%.2u:%.2u",
496 running, day, hrs, min, sec);
497 } else
498 snprintf(statline, sizeof(statline), "Status: %s", running);
499 printf("%-44s", statline);
500 switch (s->debug) {
501 case PF_DEBUG_NONE:
502 printf("%15s\n\n", "Debug: None");
503 break;
504 case PF_DEBUG_URGENT:
505 printf("%15s\n\n", "Debug: Urgent");
506 break;
507 case PF_DEBUG_MISC:
508 printf("%15s\n\n", "Debug: Misc");
509 break;
510 case PF_DEBUG_NOISY:
511 printf("%15s\n\n", "Debug: Loud");
512 break;
513 }
514
515 if (opts & PF_OPT_VERBOSE) {
516 printf("Hostid: 0x%08x\n", ntohl(s->hostid));
517
518 for (i = 0; i < PF_MD5_DIGEST_LENGTH; i++) {
519 buf[i + i] = hex[s->pf_chksum[i] >> 4];
520 buf[i + i + 1] = hex[s->pf_chksum[i] & 0x0f];
521 }
522 buf[i + i] = '\0';
523 printf("Checksum: 0x%s\n\n", buf);
524 }
525
526 if (s->ifname[0] != 0) {
527 printf("Interface Stats for %-16s %5s %16s\n",
528 s->ifname, "IPv4", "IPv6");
529 printf(" %-25s %14llu %16llu\n", "Bytes In",
530 (unsigned long long)s->bcounters[0][0],
531 (unsigned long long)s->bcounters[1][0]);
532 printf(" %-25s %14llu %16llu\n", "Bytes Out",
533 (unsigned long long)s->bcounters[0][1],
534 (unsigned long long)s->bcounters[1][1]);
535 printf(" Packets In\n");
536 printf(" %-23s %14llu %16llu\n", "Passed",
537 (unsigned long long)s->pcounters[0][0][PF_PASS],
538 (unsigned long long)s->pcounters[1][0][PF_PASS]);
539 printf(" %-23s %14llu %16llu\n", "Blocked",
540 (unsigned long long)s->pcounters[0][0][PF_DROP],
541 (unsigned long long)s->pcounters[1][0][PF_DROP]);
542 printf(" Packets Out\n");
543 printf(" %-23s %14llu %16llu\n", "Passed",
544 (unsigned long long)s->pcounters[0][1][PF_PASS],
545 (unsigned long long)s->pcounters[1][1][PF_PASS]);
546 printf(" %-23s %14llu %16llu\n\n", "Blocked",
547 (unsigned long long)s->pcounters[0][1][PF_DROP],
548 (unsigned long long)s->pcounters[1][1][PF_DROP]);
549 }
550 printf("%-27s %14s %16s\n", "State Table", "Total", "Rate");
551 printf(" %-25s %14u %14s\n", "current entries", s->states, "");
552 for (i = 0; i < FCNT_MAX; i++) {
553 printf(" %-25s %14llu ", pf_fcounters[i],
554 (unsigned long long)s->fcounters[i]);
555 if (runtime > 0)
556 printf("%14.1f/s\n",
557 (double)s->fcounters[i] / (double)runtime);
558 else
559 printf("%14s\n", "");
560 }
561 if (opts & PF_OPT_VERBOSE) {
562 printf("Source Tracking Table\n");
563 printf(" %-25s %14u %14s\n", "current entries",
564 s->src_nodes, "");
565 for (i = 0; i < SCNT_MAX; i++) {
566 printf(" %-25s %14lld ", pf_scounters[i],
567 (unsigned long long)s->scounters[i]);
568 if (runtime > 0)
569 printf("%14.1f/s\n",
570 (double)s->scounters[i] / (double)runtime);
571 else
572 printf("%14s\n", "");
573 }
574 }
575 printf("Counters\n");
576 for (i = 0; i < PFRES_MAX; i++) {
577 printf(" %-25s %14llu ", pf_reasons[i],
578 (unsigned long long)s->counters[i]);
579 if (runtime > 0)
580 printf("%14.1f/s\n",
581 (double)s->counters[i] / (double)runtime);
582 else
583 printf("%14s\n", "");
584 }
585 if (opts & PF_OPT_VERBOSE) {
586 printf("Limit Counters\n");
587 for (i = 0; i < LCNT_MAX; i++) {
588 printf(" %-25s %14ju ", pf_lcounters[i],
589 (uintmax_t)s->lcounters[i]);
590 if (runtime > 0)
591 printf("%14.1f/s\n",
592 (double)s->lcounters[i] / (double)runtime);
593 else
594 printf("%14s\n", "");
595 }
596 }
597 }
598
599 void
print_src_node(struct pf_src_node * sn,int opts)600 print_src_node(struct pf_src_node *sn, int opts)
601 {
602 struct pf_addr_wrap aw;
603 int min, sec;
604
605 memset(&aw, 0, sizeof(aw));
606 if (sn->af == AF_INET)
607 aw.v.a.mask.addr32[0] = 0xffffffff;
608 else
609 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
610
611 aw.v.a.addr = sn->addr;
612 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
613 printf(" -> ");
614 aw.v.a.addr = sn->raddr;
615 print_addr(&aw, sn->af, opts & PF_OPT_VERBOSE2);
616 printf(" ( states %u, connections %u, rate %u.%u/%us )\n", sn->states,
617 sn->conn, sn->conn_rate.count / 1000,
618 (sn->conn_rate.count % 1000) / 100, sn->conn_rate.seconds);
619 if (opts & PF_OPT_VERBOSE) {
620 sec = sn->creation % 60;
621 sn->creation /= 60;
622 min = sn->creation % 60;
623 sn->creation /= 60;
624 printf(" age %.2u:%.2u:%.2u", sn->creation, min, sec);
625 if (sn->states == 0) {
626 sec = sn->expire % 60;
627 sn->expire /= 60;
628 min = sn->expire % 60;
629 sn->expire /= 60;
630 printf(", expires in %.2u:%.2u:%.2u",
631 sn->expire, min, sec);
632 }
633 printf(", %ju pkts, %ju bytes",
634 (uintmax_t)sn->packets[0] + sn->packets[1],
635 (uintmax_t)sn->bytes[0] + sn->bytes[1]);
636 switch (sn->ruletype) {
637 case PF_NAT:
638 if (sn->rule.nr != (uint32_t)(-1))
639 printf(", nat rule %u", sn->rule.nr);
640 break;
641 case PF_RDR:
642 if (sn->rule.nr != (uint32_t)(-1))
643 printf(", rdr rule %u", sn->rule.nr);
644 break;
645 case PF_PASS:
646 if (sn->rule.nr != (uint32_t)(-1))
647 printf(", filter rule %u", sn->rule.nr);
648 break;
649 }
650 printf("\n");
651 }
652 }
653
654 void
print_rule(struct pf_rule * r,const char * anchor_call,int verbose)655 print_rule(struct pf_rule *r, const char *anchor_call, int verbose)
656 {
657 static const char *actiontypes[] = { "pass", "block", "scrub",
658 "no scrub", "nat", "no nat", "binat", "no binat", "rdr", "no rdr" };
659 static const char *anchortypes[] = { "anchor", "anchor", "anchor",
660 "anchor", "nat-anchor", "nat-anchor", "binat-anchor",
661 "binat-anchor", "rdr-anchor", "rdr-anchor" };
662 int i, opts;
663
664 if (verbose)
665 printf("@%d ", r->nr);
666 if (r->action > PF_NORDR)
667 printf("action(%d)", r->action);
668 else if (anchor_call[0]) {
669 if (anchor_call[0] == '_') {
670 printf("%s", anchortypes[r->action]);
671 } else
672 printf("%s \"%s\"", anchortypes[r->action],
673 anchor_call);
674 } else {
675 printf("%s", actiontypes[r->action]);
676 if (r->natpass)
677 printf(" pass");
678 }
679 if (r->action == PF_DROP) {
680 if (r->rule_flag & PFRULE_RETURN)
681 printf(" return");
682 else if (r->rule_flag & PFRULE_RETURNRST) {
683 if (!r->return_ttl)
684 printf(" return-rst");
685 else
686 printf(" return-rst(ttl %d)", r->return_ttl);
687 } else if (r->rule_flag & PFRULE_RETURNICMP) {
688 const struct icmpcodeent *ic, *ic6;
689
690 ic = geticmpcodebynumber(r->return_icmp >> 8,
691 r->return_icmp & 255, AF_INET);
692 ic6 = geticmpcodebynumber(r->return_icmp6 >> 8,
693 r->return_icmp6 & 255, AF_INET6);
694
695 switch (r->af) {
696 case AF_INET:
697 printf(" return-icmp");
698 if (ic == NULL)
699 printf("(%u)", r->return_icmp & 255);
700 else
701 printf("(%s)", ic->name);
702 break;
703 case AF_INET6:
704 printf(" return-icmp6");
705 if (ic6 == NULL)
706 printf("(%u)", r->return_icmp6 & 255);
707 else
708 printf("(%s)", ic6->name);
709 break;
710 default:
711 printf(" return-icmp");
712 if (ic == NULL)
713 printf("(%u, ", r->return_icmp & 255);
714 else
715 printf("(%s, ", ic->name);
716 if (ic6 == NULL)
717 printf("%u)", r->return_icmp6 & 255);
718 else
719 printf("%s)", ic6->name);
720 break;
721 }
722 } else
723 printf(" drop");
724 }
725 if (r->direction == PF_IN)
726 printf(" in");
727 else if (r->direction == PF_OUT)
728 printf(" out");
729 if (r->log) {
730 printf(" log");
731 if (r->log & ~PF_LOG || r->logif) {
732 int count = 0;
733
734 printf(" (");
735 if (r->log & PF_LOG_ALL)
736 printf("%sall", count++ ? ", " : "");
737 if (r->log & PF_LOG_SOCKET_LOOKUP)
738 printf("%suser", count++ ? ", " : "");
739 if (r->logif)
740 printf("%sto pflog%u", count++ ? ", " : "",
741 r->logif);
742 printf(")");
743 }
744 }
745 if (r->quick)
746 printf(" quick");
747 if (r->ifname[0]) {
748 if (r->ifnot)
749 printf(" on ! %s", r->ifname);
750 else
751 printf(" on %s", r->ifname);
752 }
753 if (r->rt) {
754 if (r->rt == PF_ROUTETO)
755 printf(" route-to");
756 else if (r->rt == PF_REPLYTO)
757 printf(" reply-to");
758 else if (r->rt == PF_DUPTO)
759 printf(" dup-to");
760 else if (r->rt == PF_FASTROUTE)
761 printf(" fastroute");
762 if (r->rt != PF_FASTROUTE) {
763 printf(" ");
764 print_pool(&r->rpool, 0, 0, r->af, PF_PASS);
765 }
766 }
767 if (r->af) {
768 if (r->af == AF_INET)
769 printf(" inet");
770 else
771 printf(" inet6");
772 }
773 if (r->proto) {
774 struct protoent *p;
775
776 if ((p = getprotobynumber(r->proto)) != NULL)
777 printf(" proto %s", p->p_name);
778 else
779 printf(" proto %u", r->proto);
780 }
781 print_fromto(&r->src, r->os_fingerprint, &r->dst, r->af, r->proto,
782 verbose);
783 if (r->uid.op)
784 print_ugid(r->uid.op, r->uid.uid[0], r->uid.uid[1], "user",
785 UID_MAX);
786 if (r->gid.op)
787 print_ugid(r->gid.op, r->gid.gid[0], r->gid.gid[1], "group",
788 GID_MAX);
789 if (r->flags || r->flagset) {
790 printf(" flags ");
791 print_flags(r->flags);
792 printf("/");
793 print_flags(r->flagset);
794 } else if (r->action == PF_PASS &&
795 (!r->proto || r->proto == IPPROTO_TCP) &&
796 !(r->rule_flag & PFRULE_FRAGMENT) &&
797 !anchor_call[0] && r->keep_state)
798 printf(" flags any");
799 if (r->type) {
800 const struct icmptypeent *it;
801
802 it = geticmptypebynumber(r->type-1, r->af);
803 if (r->af != AF_INET6)
804 printf(" icmp-type");
805 else
806 printf(" icmp6-type");
807 if (it != NULL)
808 printf(" %s", it->name);
809 else
810 printf(" %u", r->type-1);
811 if (r->code) {
812 const struct icmpcodeent *ic;
813
814 ic = geticmpcodebynumber(r->type-1, r->code-1, r->af);
815 if (ic != NULL)
816 printf(" code %s", ic->name);
817 else
818 printf(" code %u", r->code-1);
819 }
820 }
821 if (r->tos)
822 printf(" tos 0x%2.2x", r->tos);
823 if (!r->keep_state && r->action == PF_PASS && !anchor_call[0])
824 printf(" no state");
825 else if (r->keep_state == PF_STATE_NORMAL)
826 printf(" keep state");
827 else if (r->keep_state == PF_STATE_MODULATE)
828 printf(" modulate state");
829 else if (r->keep_state == PF_STATE_SYNPROXY)
830 printf(" synproxy state");
831 if (r->prob) {
832 char buf[20];
833
834 snprintf(buf, sizeof(buf), "%f", r->prob*100.0/(UINT_MAX+1.0));
835 for (i = strlen(buf)-1; i > 0; i--) {
836 if (buf[i] == '0')
837 buf[i] = '\0';
838 else {
839 if (buf[i] == '.')
840 buf[i] = '\0';
841 break;
842 }
843 }
844 printf(" probability %s%%", buf);
845 }
846 opts = 0;
847 if (r->max_states || r->max_src_nodes || r->max_src_states)
848 opts = 1;
849 if (r->pickup_mode)
850 opts = 1;
851 if (r->rule_flag & PFRULE_NOSYNC)
852 opts = 1;
853 if (r->rule_flag & PFRULE_SRCTRACK)
854 opts = 1;
855 if (r->rule_flag & PFRULE_IFBOUND)
856 opts = 1;
857 if (r->rule_flag & PFRULE_STATESLOPPY)
858 opts = 1;
859 for (i = 0; !opts && i < PFTM_MAX; ++i)
860 if (r->timeout[i])
861 opts = 1;
862 if (opts) {
863 printf(" (");
864 switch(r->pickup_mode) {
865 case PF_PICKUPS_UNSPECIFIED:
866 break;
867 case PF_PICKUPS_DISABLED:
868 printf("no-pickups");
869 opts = 0;
870 break;
871 case PF_PICKUPS_HASHONLY:
872 printf("hash-only");
873 opts = 0;
874 break;
875 case PF_PICKUPS_ENABLED:
876 printf("pickups");
877 opts = 0;
878 break;
879 default:
880 printf("unknown-pickups-mode-%d", r->pickup_mode);
881 break;
882 }
883 if (r->max_states) {
884 if (!opts)
885 printf(", ");
886 printf("max %u", r->max_states);
887 opts = 0;
888 }
889 if (r->rule_flag & PFRULE_NOSYNC) {
890 if (!opts)
891 printf(", ");
892 printf("no-sync");
893 opts = 0;
894 }
895 if (r->rule_flag & PFRULE_SRCTRACK) {
896 if (!opts)
897 printf(", ");
898 printf("source-track");
899 if (r->rule_flag & PFRULE_RULESRCTRACK)
900 printf(" rule");
901 else
902 printf(" global");
903 opts = 0;
904 }
905 if (r->max_src_states) {
906 if (!opts)
907 printf(", ");
908 printf("max-src-states %u", r->max_src_states);
909 opts = 0;
910 }
911 if (r->max_src_conn) {
912 if (!opts)
913 printf(", ");
914 printf("max-src-conn %u", r->max_src_conn);
915 opts = 0;
916 }
917 if (r->max_src_conn_rate.limit) {
918 if (!opts)
919 printf(", ");
920 printf("max-src-conn-rate %u/%u",
921 r->max_src_conn_rate.limit,
922 r->max_src_conn_rate.seconds);
923 opts = 0;
924 }
925 if (r->max_src_nodes) {
926 if (!opts)
927 printf(", ");
928 printf("max-src-nodes %u", r->max_src_nodes);
929 opts = 0;
930 }
931 if (r->overload_tblname[0]) {
932 if (!opts)
933 printf(", ");
934 printf("overload <%s>", r->overload_tblname);
935 if (r->flush)
936 printf(" flush");
937 if (r->flush & PF_FLUSH_GLOBAL)
938 printf(" global");
939 }
940 if (r->rule_flag & PFRULE_IFBOUND) {
941 if (!opts)
942 printf(", ");
943 printf("if-bound");
944 opts = 0;
945 }
946 if (r->rule_flag & PFRULE_STATESLOPPY) {
947 if (!opts)
948 printf(", ");
949 printf("sloppy");
950 opts = 0;
951 }
952 for (i = 0; i < PFTM_MAX; ++i)
953 if (r->timeout[i]) {
954 int j;
955
956 if (!opts)
957 printf(", ");
958 opts = 0;
959 for (j = 0; pf_timeouts[j].name != NULL;
960 ++j)
961 if (pf_timeouts[j].timeout == i)
962 break;
963 printf("%s %u", pf_timeouts[j].name == NULL ?
964 "inv.timeout" : pf_timeouts[j].name,
965 r->timeout[i]);
966 }
967 printf(")");
968 }
969 if (r->rule_flag & PFRULE_FRAGMENT)
970 printf(" fragment");
971 if (r->rule_flag & PFRULE_NODF)
972 printf(" no-df");
973 if (r->rule_flag & PFRULE_RANDOMID)
974 printf(" random-id");
975 if (r->min_ttl)
976 printf(" min-ttl %d", r->min_ttl);
977 if (r->max_mss)
978 printf(" max-mss %d", r->max_mss);
979 if (r->rule_flag & PFRULE_SET_TOS)
980 printf(" set-tos 0x%2.2x", r->set_tos);
981 if (r->allow_opts)
982 printf(" allow-opts");
983 if (r->action == PF_SCRUB) {
984 if (r->rule_flag & PFRULE_REASSEMBLE_TCP)
985 printf(" reassemble tcp");
986
987 if (r->rule_flag & PFRULE_FRAGDROP)
988 printf(" fragment drop-ovl");
989 else if (r->rule_flag & PFRULE_FRAGCROP)
990 printf(" fragment crop");
991 else
992 printf(" fragment reassemble");
993 }
994 if (r->label[0])
995 printf(" label \"%s\"", r->label);
996 if (r->qname[0] && r->pqname[0])
997 printf(" queue(%s, %s)", r->qname, r->pqname);
998 else if (r->qname[0])
999 printf(" queue %s", r->qname);
1000 if (r->tagname[0])
1001 printf(" tag %s", r->tagname);
1002 if (r->match_tagname[0]) {
1003 if (r->match_tag_not)
1004 printf(" !");
1005 printf(" tagged %s", r->match_tagname);
1006 }
1007 if (r->rtableid != -1)
1008 printf(" rtable %u", r->rtableid);
1009 if (r->divert.port) {
1010 if (PF_AZERO(&r->divert.addr, r->af)) {
1011 printf(" divert-reply");
1012 } else {
1013 /* XXX cut&paste from print_addr */
1014 char buf[48];
1015
1016 printf(" divert-to ");
1017 if (inet_ntop(r->af, &r->divert.addr, buf,
1018 sizeof(buf)) == NULL)
1019 printf("?");
1020 else
1021 printf("%s", buf);
1022 printf(" port %u", ntohs(r->divert.port));
1023 }
1024 }
1025 if (!anchor_call[0] && (r->action == PF_NAT ||
1026 r->action == PF_BINAT || r->action == PF_RDR)) {
1027 printf(" -> ");
1028 print_pool(&r->rpool, r->rpool.proxy_port[0],
1029 r->rpool.proxy_port[1], r->af, r->action);
1030 }
1031 }
1032
1033 void
print_tabledef(const char * name,int flags,int addrs,struct node_tinithead * nodes)1034 print_tabledef(const char *name, int flags, int addrs,
1035 struct node_tinithead *nodes)
1036 {
1037 struct node_tinit *ti, *nti;
1038 struct node_host *h;
1039
1040 printf("table <%s>", name);
1041 if (flags & PFR_TFLAG_CONST)
1042 printf(" const");
1043 if (flags & PFR_TFLAG_PERSIST)
1044 printf(" persist");
1045 if (flags & PFR_TFLAG_COUNTERS)
1046 printf(" counters");
1047 SIMPLEQ_FOREACH(ti, nodes, entries) {
1048 if (ti->file) {
1049 printf(" file \"%s\"", ti->file);
1050 continue;
1051 }
1052 printf(" {");
1053 for (;;) {
1054 for (h = ti->host; h != NULL; h = h->next) {
1055 printf(h->not ? " !" : " ");
1056 print_addr(&h->addr, h->af, 0);
1057 }
1058 nti = SIMPLEQ_NEXT(ti, entries);
1059 if (nti != NULL && nti->file == NULL)
1060 ti = nti; /* merge lists */
1061 else
1062 break;
1063 }
1064 printf(" }");
1065 }
1066 if (addrs && SIMPLEQ_EMPTY(nodes))
1067 printf(" { }");
1068 printf("\n");
1069 }
1070
1071 int
parse_flags(const char * s)1072 parse_flags(const char *s)
1073 {
1074 const char *p, *q;
1075 u_int8_t f = 0;
1076
1077 for (p = s; *p; p++) {
1078 if ((q = strchr(tcpflags, *p)) == NULL)
1079 return -1;
1080 else
1081 f |= 1 << (q - tcpflags);
1082 }
1083 return (f ? f : PF_TH_ALL);
1084 }
1085
1086 void
set_ipmask(struct node_host * h,u_int8_t b)1087 set_ipmask(struct node_host *h, u_int8_t b)
1088 {
1089 struct pf_addr *m, *n;
1090 int i, j = 0;
1091
1092 m = &h->addr.v.a.mask;
1093 memset(m, 0, sizeof(*m));
1094
1095 while (b >= 32) {
1096 m->addr32[j++] = 0xffffffff;
1097 b -= 32;
1098 }
1099 for (i = 31; i > 31-b; --i)
1100 m->addr32[j] |= (1 << i);
1101 if (b)
1102 m->addr32[j] = htonl(m->addr32[j]);
1103
1104 /* Mask off bits of the address that will never be used. */
1105 n = &h->addr.v.a.addr;
1106 if (h->addr.type == PF_ADDR_ADDRMASK)
1107 for (i = 0; i < 4; i++)
1108 n->addr32[i] = n->addr32[i] & m->addr32[i];
1109 }
1110
1111 int
check_netmask(struct node_host * h,sa_family_t af)1112 check_netmask(struct node_host *h, sa_family_t af)
1113 {
1114 struct node_host *n = NULL;
1115 struct pf_addr *m;
1116
1117 for (n = h; n != NULL; n = n->next) {
1118 if (h->addr.type == PF_ADDR_TABLE)
1119 continue;
1120 m = &h->addr.v.a.mask;
1121 /* fix up netmask for dynaddr */
1122 if (af == AF_INET && h->addr.type == PF_ADDR_DYNIFTL &&
1123 unmask(m, AF_INET6) > 32)
1124 set_ipmask(n, 32);
1125 /* netmasks > 32 bit are invalid on v4 */
1126 if (af == AF_INET &&
1127 (m->addr32[1] || m->addr32[2] || m->addr32[3])) {
1128 fprintf(stderr, "netmask %u invalid for IPv4 address\n",
1129 unmask(m, AF_INET6));
1130 return (1);
1131 }
1132 }
1133 return (0);
1134 }
1135
1136 /* interface lookup routines */
1137
1138 struct node_host *iftab;
1139
1140 void
ifa_load(void)1141 ifa_load(void)
1142 {
1143 struct ifaddrs *ifap, *ifa;
1144 struct node_host *n = NULL, *h = NULL;
1145
1146 if (getifaddrs(&ifap) < 0)
1147 err(1, "getifaddrs");
1148
1149 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
1150 if (!(ifa->ifa_addr->sa_family == AF_INET ||
1151 ifa->ifa_addr->sa_family == AF_INET6 ||
1152 ifa->ifa_addr->sa_family == AF_LINK))
1153 continue;
1154 n = calloc(1, sizeof(struct node_host));
1155 if (n == NULL)
1156 err(1, "address: calloc");
1157 n->af = ifa->ifa_addr->sa_family;
1158 n->ifa_flags = ifa->ifa_flags;
1159 #ifdef __KAME__
1160 if (n->af == AF_INET6 &&
1161 IN6_IS_ADDR_LINKLOCAL(&((struct sockaddr_in6 *)
1162 ifa->ifa_addr)->sin6_addr) &&
1163 ((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id ==
1164 0) {
1165 struct sockaddr_in6 *sin6;
1166
1167 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
1168 sin6->sin6_scope_id = sin6->sin6_addr.s6_addr[2] << 8 |
1169 sin6->sin6_addr.s6_addr[3];
1170 sin6->sin6_addr.s6_addr[2] = 0;
1171 sin6->sin6_addr.s6_addr[3] = 0;
1172 }
1173 #endif
1174 n->ifindex = 0;
1175 if (n->af == AF_INET) {
1176 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in *)
1177 ifa->ifa_addr)->sin_addr.s_addr,
1178 sizeof(struct in_addr));
1179 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in *)
1180 ifa->ifa_netmask)->sin_addr.s_addr,
1181 sizeof(struct in_addr));
1182 if (ifa->ifa_broadaddr != NULL)
1183 memcpy(&n->bcast, &((struct sockaddr_in *)
1184 ifa->ifa_broadaddr)->sin_addr.s_addr,
1185 sizeof(struct in_addr));
1186 if (ifa->ifa_dstaddr != NULL)
1187 memcpy(&n->peer, &((struct sockaddr_in *)
1188 ifa->ifa_dstaddr)->sin_addr.s_addr,
1189 sizeof(struct in_addr));
1190 } else if (n->af == AF_INET6) {
1191 memcpy(&n->addr.v.a.addr, &((struct sockaddr_in6 *)
1192 ifa->ifa_addr)->sin6_addr.s6_addr,
1193 sizeof(struct in6_addr));
1194 memcpy(&n->addr.v.a.mask, &((struct sockaddr_in6 *)
1195 ifa->ifa_netmask)->sin6_addr.s6_addr,
1196 sizeof(struct in6_addr));
1197 if (ifa->ifa_broadaddr != NULL)
1198 memcpy(&n->bcast, &((struct sockaddr_in6 *)
1199 ifa->ifa_broadaddr)->sin6_addr.s6_addr,
1200 sizeof(struct in6_addr));
1201 if (ifa->ifa_dstaddr != NULL)
1202 memcpy(&n->peer, &((struct sockaddr_in6 *)
1203 ifa->ifa_dstaddr)->sin6_addr.s6_addr,
1204 sizeof(struct in6_addr));
1205 n->ifindex = ((struct sockaddr_in6 *)
1206 ifa->ifa_addr)->sin6_scope_id;
1207 }
1208 if ((n->ifname = strdup(ifa->ifa_name)) == NULL)
1209 err(1, "ifa_load: strdup");
1210 n->next = NULL;
1211 n->tail = n;
1212 if (h == NULL)
1213 h = n;
1214 else {
1215 h->tail->next = n;
1216 h->tail = n;
1217 }
1218 }
1219
1220 iftab = h;
1221 freeifaddrs(ifap);
1222 }
1223
1224 struct node_host *
ifa_exists(const char * ifa_name)1225 ifa_exists(const char *ifa_name)
1226 {
1227 struct node_host *n;
1228 struct ifgroupreq ifgr;
1229 int s;
1230
1231 if (iftab == NULL)
1232 ifa_load();
1233
1234 /* check wether this is a group */
1235 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1236 err(1, "socket");
1237 bzero(&ifgr, sizeof(ifgr));
1238 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1239 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == 0) {
1240 /* fake a node_host */
1241 if ((n = calloc(1, sizeof(*n))) == NULL)
1242 err(1, "calloc");
1243 if ((n->ifname = strdup(ifa_name)) == NULL)
1244 err(1, "strdup");
1245 close(s);
1246 return (n);
1247 }
1248 close(s);
1249
1250 for (n = iftab; n; n = n->next) {
1251 if (n->af == AF_LINK && !strncmp(n->ifname, ifa_name, IFNAMSIZ))
1252 return (n);
1253 }
1254
1255 return (NULL);
1256 }
1257
1258 struct node_host *
ifa_grouplookup(const char * ifa_name,int flags)1259 ifa_grouplookup(const char *ifa_name, int flags)
1260 {
1261 struct ifg_req *ifg;
1262 struct ifgroupreq ifgr;
1263 int s;
1264 size_t len;
1265 struct node_host *n, *h = NULL;
1266
1267 if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
1268 err(1, "socket");
1269 bzero(&ifgr, sizeof(ifgr));
1270 strlcpy(ifgr.ifgr_name, ifa_name, sizeof(ifgr.ifgr_name));
1271 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1) {
1272 close(s);
1273 return (NULL);
1274 }
1275
1276 len = ifgr.ifgr_len;
1277 if ((ifgr.ifgr_groups = calloc(1, len)) == NULL)
1278 err(1, "calloc");
1279 if (ioctl(s, SIOCGIFGMEMB, (caddr_t)&ifgr) == -1)
1280 err(1, "SIOCGIFGMEMB");
1281
1282 for (ifg = ifgr.ifgr_groups; ifg && len >= sizeof(struct ifg_req);
1283 ifg++) {
1284 len -= sizeof(struct ifg_req);
1285 if ((n = ifa_lookup(ifg->ifgrq_member, flags)) == NULL)
1286 continue;
1287 if (h == NULL)
1288 h = n;
1289 else {
1290 h->tail->next = n;
1291 h->tail = n->tail;
1292 }
1293 }
1294 free(ifgr.ifgr_groups);
1295 close(s);
1296
1297 return (h);
1298 }
1299
1300 struct node_host *
ifa_lookup(const char * ifa_name,int flags)1301 ifa_lookup(const char *ifa_name, int flags)
1302 {
1303 struct node_host *p = NULL, *h = NULL, *n = NULL;
1304 int got4 = 0, got6 = 0;
1305 const char *last_if = NULL;
1306
1307 if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
1308 return (h);
1309
1310 if (!strncmp(ifa_name, "self", IFNAMSIZ))
1311 ifa_name = NULL;
1312
1313 if (iftab == NULL)
1314 ifa_load();
1315
1316 for (p = iftab; p; p = p->next) {
1317 if (ifa_skip_if(ifa_name, p))
1318 continue;
1319 if ((flags & PFI_AFLAG_BROADCAST) && p->af != AF_INET)
1320 continue;
1321 if ((flags & PFI_AFLAG_BROADCAST) &&
1322 !(p->ifa_flags & IFF_BROADCAST))
1323 continue;
1324 if ((flags & PFI_AFLAG_PEER) &&
1325 !(p->ifa_flags & IFF_POINTOPOINT))
1326 continue;
1327 if ((flags & PFI_AFLAG_NETWORK) && p->ifindex > 0)
1328 continue;
1329 if (last_if == NULL || strcmp(last_if, p->ifname))
1330 got4 = got6 = 0;
1331 last_if = p->ifname;
1332 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET && got4)
1333 continue;
1334 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 && got6)
1335 continue;
1336 if ((flags & PFI_AFLAG_NOALIAS) && p->af == AF_INET6 &&
1337 IN6_IS_ADDR_LINKLOCAL(&p->addr.v.a.addr.v6))
1338 continue;
1339 if (p->af == AF_INET)
1340 got4 = 1;
1341 else
1342 got6 = 1;
1343 n = calloc(1, sizeof(struct node_host));
1344 if (n == NULL)
1345 err(1, "address: calloc");
1346 n->af = p->af;
1347 if (flags & PFI_AFLAG_BROADCAST)
1348 memcpy(&n->addr.v.a.addr, &p->bcast,
1349 sizeof(struct pf_addr));
1350 else if (flags & PFI_AFLAG_PEER)
1351 memcpy(&n->addr.v.a.addr, &p->peer,
1352 sizeof(struct pf_addr));
1353 else
1354 memcpy(&n->addr.v.a.addr, &p->addr.v.a.addr,
1355 sizeof(struct pf_addr));
1356 if (flags & PFI_AFLAG_NETWORK)
1357 set_ipmask(n, unmask(&p->addr.v.a.mask, n->af));
1358 else {
1359 if (n->af == AF_INET) {
1360 if (p->ifa_flags & IFF_LOOPBACK &&
1361 p->ifa_flags & IFF_LINK1)
1362 memcpy(&n->addr.v.a.mask,
1363 &p->addr.v.a.mask,
1364 sizeof(struct pf_addr));
1365 else
1366 set_ipmask(n, 32);
1367 } else
1368 set_ipmask(n, 128);
1369 }
1370 n->ifindex = p->ifindex;
1371
1372 n->next = NULL;
1373 n->tail = n;
1374 if (h == NULL)
1375 h = n;
1376 else {
1377 h->tail->next = n;
1378 h->tail = n;
1379 }
1380 }
1381 return (h);
1382 }
1383
1384 int
ifa_skip_if(const char * filter,struct node_host * p)1385 ifa_skip_if(const char *filter, struct node_host *p)
1386 {
1387 int n;
1388
1389 if (p->af != AF_INET && p->af != AF_INET6)
1390 return (1);
1391 if (filter == NULL || !*filter)
1392 return (0);
1393 if (!strcmp(p->ifname, filter))
1394 return (0); /* exact match */
1395 n = strlen(filter);
1396 if (n < 1 || n >= IFNAMSIZ)
1397 return (1); /* sanity check */
1398 if (filter[n-1] >= '0' && filter[n-1] <= '9')
1399 return (1); /* only do exact match in that case */
1400 if (strncmp(p->ifname, filter, n))
1401 return (1); /* prefix doesn't match */
1402 return (p->ifname[n] < '0' || p->ifname[n] > '9');
1403 }
1404
1405
1406 struct node_host *
host(const char * s)1407 host(const char *s)
1408 {
1409 struct node_host *h = NULL;
1410 int mask, v4mask, v6mask, cont = 1;
1411 char *p, *q, *ps;
1412
1413 if ((p = strrchr(s, '/')) != NULL) {
1414 mask = strtol(p+1, &q, 0);
1415 if (!q || *q || mask > 128 || q == (p+1)) {
1416 fprintf(stderr, "invalid netmask '%s'\n", p);
1417 return (NULL);
1418 }
1419 if ((ps = malloc(strlen(s) - strlen(p) + 1)) == NULL)
1420 err(1, "host: malloc");
1421 strlcpy(ps, s, strlen(s) - strlen(p) + 1);
1422 v4mask = v6mask = mask;
1423 } else {
1424 if ((ps = strdup(s)) == NULL)
1425 err(1, "host: strdup");
1426 v4mask = 32;
1427 v6mask = 128;
1428 mask = -1;
1429 }
1430
1431 /* interface with this name exists? */
1432 if (cont && (h = host_if(ps, mask)) != NULL)
1433 cont = 0;
1434
1435 /* IPv4 address? */
1436 if (cont && (h = host_v4(s)) != NULL)
1437 cont = 0;
1438
1439 /* IPv6 address? */
1440 if (cont && (h = host_v6(ps, v6mask)) != NULL)
1441 cont = 0;
1442
1443 /* dns lookup */
1444 if (cont && (h = host_dns(ps, v4mask, v6mask)) != NULL)
1445 cont = 0;
1446 free(ps);
1447
1448 if (h == NULL || cont == 1) {
1449 fprintf(stderr, "no IP address found for %s\n", s);
1450 return (NULL);
1451 }
1452 return (h);
1453 }
1454
1455 struct node_host *
host_if(const char * s,int mask)1456 host_if(const char *s, int mask)
1457 {
1458 struct node_host *n, *h = NULL;
1459 char *p, *ps;
1460 int flags = 0;
1461
1462 if ((ps = strdup(s)) == NULL)
1463 err(1, "host_if: strdup");
1464 while ((p = strrchr(ps, ':')) != NULL) {
1465 if (!strcmp(p+1, "network"))
1466 flags |= PFI_AFLAG_NETWORK;
1467 else if (!strcmp(p+1, "broadcast"))
1468 flags |= PFI_AFLAG_BROADCAST;
1469 else if (!strcmp(p+1, "peer"))
1470 flags |= PFI_AFLAG_PEER;
1471 else if (!strcmp(p+1, "0"))
1472 flags |= PFI_AFLAG_NOALIAS;
1473 else {
1474 free(ps);
1475 return (NULL);
1476 }
1477 *p = '\0';
1478 }
1479 if (flags & (flags - 1) & PFI_AFLAG_MODEMASK) { /* Yep! */
1480 fprintf(stderr, "illegal combination of interface modifiers\n");
1481 free(ps);
1482 return (NULL);
1483 }
1484 if ((flags & (PFI_AFLAG_NETWORK|PFI_AFLAG_BROADCAST)) && mask > -1) {
1485 fprintf(stderr, "network or broadcast lookup, but "
1486 "extra netmask given\n");
1487 free(ps);
1488 return (NULL);
1489 }
1490 if (ifa_exists(ps) || !strncmp(ps, "self", IFNAMSIZ)) {
1491 /* interface with this name exists */
1492 h = ifa_lookup(ps, flags);
1493 for (n = h; n != NULL && mask > -1; n = n->next)
1494 set_ipmask(n, mask);
1495 }
1496
1497 free(ps);
1498 return (h);
1499 }
1500
1501 static struct node_host *
host_v4(const char * s)1502 host_v4(const char *s)
1503 {
1504 struct node_host *h = NULL;
1505 struct in_addr ina;
1506 int bits = 32;
1507
1508 memset(&ina, 0, sizeof(struct in_addr));
1509 if (strrchr(s, '/') != NULL) {
1510 if ((bits = inet_net_pton(AF_INET, s, &ina, sizeof(ina))) == -1)
1511 return (NULL);
1512 } else {
1513 if (inet_pton(AF_INET, s, &ina) != 1)
1514 return (NULL);
1515 }
1516
1517 h = calloc(1, sizeof(struct node_host));
1518 if (h == NULL)
1519 err(1, "address: calloc");
1520 h->ifname = NULL;
1521 h->af = AF_INET;
1522 h->addr.v.a.addr.addr32[0] = ina.s_addr;
1523 set_ipmask(h, bits);
1524 h->next = NULL;
1525 h->tail = h;
1526
1527 return (h);
1528 }
1529
1530 struct node_host *
host_v6(const char * s,int mask)1531 host_v6(const char *s, int mask)
1532 {
1533 struct addrinfo hints, *res;
1534 struct node_host *h = NULL;
1535
1536 memset(&hints, 0, sizeof(hints));
1537 hints.ai_family = AF_INET6;
1538 hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1539 hints.ai_flags = AI_NUMERICHOST;
1540 if (getaddrinfo(s, "0", &hints, &res) == 0) {
1541 h = calloc(1, sizeof(struct node_host));
1542 if (h == NULL)
1543 err(1, "address: calloc");
1544 h->ifname = NULL;
1545 h->af = AF_INET6;
1546 memcpy(&h->addr.v.a.addr,
1547 &((struct sockaddr_in6 *)res->ai_addr)->sin6_addr,
1548 sizeof(h->addr.v.a.addr));
1549 h->ifindex =
1550 ((struct sockaddr_in6 *)res->ai_addr)->sin6_scope_id;
1551 set_ipmask(h, mask);
1552 freeaddrinfo(res);
1553 h->next = NULL;
1554 h->tail = h;
1555 }
1556
1557 return (h);
1558 }
1559
1560 struct node_host *
host_dns(const char * s,int v4mask,int v6mask)1561 host_dns(const char *s, int v4mask, int v6mask)
1562 {
1563 struct addrinfo hints, *res0, *res;
1564 struct node_host *n, *h = NULL;
1565 int error, noalias = 0;
1566 int got4 = 0, got6 = 0;
1567 char *p, *ps;
1568
1569 if ((ps = strdup(s)) == NULL)
1570 err(1, "host_dns: strdup");
1571 if ((p = strrchr(ps, ':')) != NULL && !strcmp(p, ":0")) {
1572 noalias = 1;
1573 *p = '\0';
1574 }
1575 memset(&hints, 0, sizeof(hints));
1576 hints.ai_family = PF_UNSPEC;
1577 hints.ai_socktype = SOCK_STREAM; /* DUMMY */
1578 error = getaddrinfo(ps, NULL, &hints, &res0);
1579 if (error) {
1580 free(ps);
1581 return (h);
1582 }
1583
1584 for (res = res0; res; res = res->ai_next) {
1585 if (res->ai_family != AF_INET &&
1586 res->ai_family != AF_INET6)
1587 continue;
1588 if (noalias) {
1589 if (res->ai_family == AF_INET) {
1590 if (got4)
1591 continue;
1592 got4 = 1;
1593 } else {
1594 if (got6)
1595 continue;
1596 got6 = 1;
1597 }
1598 }
1599 n = calloc(1, sizeof(struct node_host));
1600 if (n == NULL)
1601 err(1, "host_dns: calloc");
1602 n->ifname = NULL;
1603 n->af = res->ai_family;
1604 if (res->ai_family == AF_INET) {
1605 memcpy(&n->addr.v.a.addr,
1606 &((struct sockaddr_in *)
1607 res->ai_addr)->sin_addr.s_addr,
1608 sizeof(struct in_addr));
1609 set_ipmask(n, v4mask);
1610 } else {
1611 memcpy(&n->addr.v.a.addr,
1612 &((struct sockaddr_in6 *)
1613 res->ai_addr)->sin6_addr.s6_addr,
1614 sizeof(struct in6_addr));
1615 n->ifindex =
1616 ((struct sockaddr_in6 *)
1617 res->ai_addr)->sin6_scope_id;
1618 set_ipmask(n, v6mask);
1619 }
1620 n->next = NULL;
1621 n->tail = n;
1622 if (h == NULL)
1623 h = n;
1624 else {
1625 h->tail->next = n;
1626 h->tail = n;
1627 }
1628 }
1629 freeaddrinfo(res0);
1630 free(ps);
1631
1632 return (h);
1633 }
1634
1635 /*
1636 * convert a hostname to a list of addresses and put them in the given buffer.
1637 * test:
1638 * if set to 1, only simple addresses are accepted (no netblock, no "!").
1639 */
1640 int
append_addr(struct pfr_buffer * b,char * s,int test)1641 append_addr(struct pfr_buffer *b, char *s, int test)
1642 {
1643 char *r;
1644 struct node_host *h, *n;
1645 int rv, not = 0;
1646
1647 for (r = s; *r == '!'; r++)
1648 not = !not;
1649 if ((n = host(r)) == NULL) {
1650 errno = 0;
1651 return (-1);
1652 }
1653 rv = append_addr_host(b, n, test, not);
1654 do {
1655 h = n;
1656 n = n->next;
1657 free(h);
1658 } while (n != NULL);
1659 return (rv);
1660 }
1661
1662 /*
1663 * same as previous function, but with a pre-parsed input and the ability
1664 * to "negate" the result. Does not free the node_host list.
1665 * not:
1666 * setting it to 1 is equivalent to adding "!" in front of parameter s.
1667 */
1668 int
append_addr_host(struct pfr_buffer * b,struct node_host * n,int test,int not)1669 append_addr_host(struct pfr_buffer *b, struct node_host *n, int test, int not)
1670 {
1671 int bits;
1672 struct pfr_addr addr;
1673
1674 do {
1675 bzero(&addr, sizeof(addr));
1676 addr.pfra_not = n->not ^ not;
1677 addr.pfra_af = n->af;
1678 addr.pfra_net = unmask(&n->addr.v.a.mask, n->af);
1679 switch (n->af) {
1680 case AF_INET:
1681 addr.pfra_ip4addr.s_addr = n->addr.v.a.addr.addr32[0];
1682 bits = 32;
1683 break;
1684 case AF_INET6:
1685 memcpy(&addr.pfra_ip6addr, &n->addr.v.a.addr.v6,
1686 sizeof(struct in6_addr));
1687 bits = 128;
1688 break;
1689 default:
1690 errno = EINVAL;
1691 return (-1);
1692 }
1693 if ((test && (not || addr.pfra_net != bits)) ||
1694 addr.pfra_net > bits) {
1695 errno = EINVAL;
1696 return (-1);
1697 }
1698 if (pfr_buf_add(b, &addr))
1699 return (-1);
1700 } while ((n = n->next) != NULL);
1701
1702 return (0);
1703 }
1704
1705 int
pfctl_add_trans(struct pfr_buffer * buf,int rs_num,const char * anchor)1706 pfctl_add_trans(struct pfr_buffer *buf, int rs_num, const char *anchor)
1707 {
1708 struct pfioc_trans_e trans;
1709
1710 bzero(&trans, sizeof(trans));
1711 trans.rs_num = rs_num;
1712 if (strlcpy(trans.anchor, anchor,
1713 sizeof(trans.anchor)) >= sizeof(trans.anchor))
1714 errx(1, "pfctl_add_trans: strlcpy");
1715
1716 return pfr_buf_add(buf, &trans);
1717 }
1718
1719 u_int32_t
pfctl_get_ticket(struct pfr_buffer * buf,int rs_num,const char * anchor)1720 pfctl_get_ticket(struct pfr_buffer *buf, int rs_num, const char *anchor)
1721 {
1722 const struct pfioc_trans_e *p;
1723
1724 PFRB_FOREACH(p, buf)
1725 if (rs_num == p->rs_num && !strcmp(anchor, p->anchor))
1726 return (p->ticket);
1727 errx(1, "pfctl_get_ticket: assertion failed");
1728 }
1729
1730 int
pfctl_trans(int dev,struct pfr_buffer * buf,u_long cmd,int from)1731 pfctl_trans(int dev, struct pfr_buffer *buf, u_long cmd, int from)
1732 {
1733 struct pfioc_trans trans;
1734
1735 bzero(&trans, sizeof(trans));
1736 trans.size = buf->pfrb_size - from;
1737 trans.esize = sizeof(struct pfioc_trans_e);
1738 trans.array = ((struct pfioc_trans_e *)buf->pfrb_caddr) + from;
1739 return ioctl(dev, cmd, &trans);
1740 }
1741