1 /* $OpenBSD: pf_print_state.c,v 1.52 2008/08/12 16:40:18 david Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2001 Daniel Hartmeier
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/socket.h>
37 #include <sys/endian.h>
38 #include <net/if.h>
39 #define TCPSTATES
40 #include <netinet/tcp_fsm.h>
41 #include <netinet/sctp.h>
42 #include <net/pfvar.h>
43 #include <arpa/inet.h>
44 #include <netdb.h>
45
46 #include <stdint.h>
47 #include <stdio.h>
48 #include <string.h>
49
50 #include "pfctl_parser.h"
51 #include "pfctl.h"
52
53 void print_name(struct pf_addr *, sa_family_t);
54
55 void
print_addr(struct pf_addr_wrap * addr,sa_family_t af,int verbose)56 print_addr(struct pf_addr_wrap *addr, sa_family_t af, int verbose)
57 {
58 switch (addr->type) {
59 case PF_ADDR_DYNIFTL:
60 printf("(%s", addr->v.ifname);
61 if (addr->iflags & PFI_AFLAG_NETWORK)
62 printf(":network");
63 if (addr->iflags & PFI_AFLAG_BROADCAST)
64 printf(":broadcast");
65 if (addr->iflags & PFI_AFLAG_PEER)
66 printf(":peer");
67 if (addr->iflags & PFI_AFLAG_NOALIAS)
68 printf(":0");
69 if (verbose) {
70 if (addr->p.dyncnt <= 0)
71 printf(":*");
72 else
73 printf(":%d", addr->p.dyncnt);
74 }
75 printf(")");
76 break;
77 case PF_ADDR_TABLE:
78 if (verbose)
79 if (addr->p.tblcnt == -1)
80 printf("<%s:*>", addr->v.tblname);
81 else
82 printf("<%s:%d>", addr->v.tblname,
83 addr->p.tblcnt);
84 else
85 printf("<%s>", addr->v.tblname);
86 return;
87 case PF_ADDR_RANGE: {
88 print_addr_str(af, &addr->v.a.addr);
89 printf(" - ");
90 print_addr_str(af, &addr->v.a.mask);
91
92 break;
93 }
94 case PF_ADDR_ADDRMASK:
95 if (PF_AZERO(&addr->v.a.addr, AF_INET6) &&
96 PF_AZERO(&addr->v.a.mask, AF_INET6))
97 printf("any");
98 else
99 print_addr_str(af, &addr->v.a.addr);
100 break;
101 case PF_ADDR_NOROUTE:
102 printf("no-route");
103 return;
104 case PF_ADDR_URPFFAILED:
105 printf("urpf-failed");
106 return;
107 default:
108 printf("?");
109 return;
110 }
111
112 /* mask if not _both_ address and mask are zero */
113 if (addr->type != PF_ADDR_RANGE &&
114 !(PF_AZERO(&addr->v.a.addr, AF_INET6) &&
115 PF_AZERO(&addr->v.a.mask, AF_INET6))) {
116 int bits = unmask(&addr->v.a.mask, af);
117
118 if (bits < (af == AF_INET ? 32 : 128))
119 printf("/%d", bits);
120 }
121 }
122
123 void
print_addr_str(sa_family_t af,struct pf_addr * addr)124 print_addr_str(sa_family_t af, struct pf_addr *addr)
125 {
126 static char buf[48];
127
128 if (inet_ntop(af, addr, buf, sizeof(buf)) == NULL)
129 printf("?");
130 else
131 printf("%s", buf);
132 }
133
134 void
print_name(struct pf_addr * addr,sa_family_t af)135 print_name(struct pf_addr *addr, sa_family_t af)
136 {
137 char host[NI_MAXHOST];
138
139 strlcpy(host, "?", sizeof(host));
140 switch (af) {
141 case AF_INET: {
142 struct sockaddr_in sin;
143
144 memset(&sin, 0, sizeof(sin));
145 sin.sin_len = sizeof(sin);
146 sin.sin_family = AF_INET;
147 sin.sin_addr = addr->v4;
148 getnameinfo((struct sockaddr *)&sin, sin.sin_len,
149 host, sizeof(host), NULL, 0, NI_NOFQDN);
150 break;
151 }
152 case AF_INET6: {
153 struct sockaddr_in6 sin6;
154
155 memset(&sin6, 0, sizeof(sin6));
156 sin6.sin6_len = sizeof(sin6);
157 sin6.sin6_family = AF_INET6;
158 sin6.sin6_addr = addr->v6;
159 getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
160 host, sizeof(host), NULL, 0, NI_NOFQDN);
161 break;
162 }
163 }
164 printf("%s", host);
165 }
166
167 void
print_host(struct pf_addr * addr,u_int16_t port,sa_family_t af,int opts)168 print_host(struct pf_addr *addr, u_int16_t port, sa_family_t af, int opts)
169 {
170 if (opts & PF_OPT_USEDNS)
171 print_name(addr, af);
172 else {
173 struct pf_addr_wrap aw;
174
175 memset(&aw, 0, sizeof(aw));
176 aw.v.a.addr = *addr;
177 if (af == AF_INET)
178 aw.v.a.mask.addr32[0] = 0xffffffff;
179 else {
180 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
181 af = AF_INET6;
182 }
183 print_addr(&aw, af, opts & PF_OPT_VERBOSE2);
184 }
185
186 if (port) {
187 if (af == AF_INET)
188 printf(":%u", ntohs(port));
189 else
190 printf("[%u]", ntohs(port));
191 }
192 }
193
194 void
print_seq(struct pfctl_state_peer * p)195 print_seq(struct pfctl_state_peer *p)
196 {
197 if (p->seqdiff)
198 printf("[%u + %u](+%u)", p->seqlo,
199 p->seqhi - p->seqlo, p->seqdiff);
200 else
201 printf("[%u + %u]", p->seqlo,
202 p->seqhi - p->seqlo);
203 }
204
205
206 static const char *
sctp_state_name(int state)207 sctp_state_name(int state)
208 {
209 switch (state) {
210 case SCTP_CLOSED:
211 return ("CLOSED");
212 case SCTP_BOUND:
213 return ("BOUND");
214 case SCTP_LISTEN:
215 return ("LISTEN");
216 case SCTP_COOKIE_WAIT:
217 return ("COOKIE_WAIT");
218 case SCTP_COOKIE_ECHOED:
219 return ("COOKIE_ECHOED");
220 case SCTP_ESTABLISHED:
221 return ("ESTABLISHED");
222 case SCTP_SHUTDOWN_SENT:
223 return ("SHUTDOWN_SENT");
224 case SCTP_SHUTDOWN_RECEIVED:
225 return ("SHUTDOWN_RECEIVED");
226 case SCTP_SHUTDOWN_ACK_SENT:
227 return ("SHUTDOWN_ACK_SENT");
228 case SCTP_SHUTDOWN_PENDING:
229 return ("SHUTDOWN_PENDING");
230 default:
231 return ("?");
232 }
233 }
234
235 void
print_state(struct pfctl_state * s,int opts)236 print_state(struct pfctl_state *s, int opts)
237 {
238 struct pfctl_state_peer *src, *dst;
239 struct pfctl_state_key *key, *sk, *nk;
240 const char *protoname;
241 int min, sec;
242 sa_family_t af;
243 uint8_t proto;
244 int afto = (s->key[PF_SK_STACK].af != s->key[PF_SK_WIRE].af);
245 int idx;
246 const char *sn_type_names[] = PF_SN_TYPE_NAMES;
247 #ifndef __NO_STRICT_ALIGNMENT
248 struct pfctl_state_key aligned_key[2];
249
250 bcopy(&s->key, aligned_key, sizeof(aligned_key));
251 key = aligned_key;
252 #else
253 key = s->key;
254 #endif
255
256 af = s->key[PF_SK_WIRE].af;
257 proto = s->key[PF_SK_WIRE].proto;
258
259 if (s->direction == PF_OUT) {
260 src = &s->src;
261 dst = &s->dst;
262 sk = &key[PF_SK_STACK];
263 nk = &key[PF_SK_WIRE];
264 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6)
265 sk->port[0] = nk->port[0];
266 } else {
267 src = &s->dst;
268 dst = &s->src;
269 sk = &key[PF_SK_WIRE];
270 nk = &key[PF_SK_STACK];
271 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6)
272 sk->port[1] = nk->port[1];
273 }
274 printf("%s ", s->ifname);
275 if ((protoname = pfctl_proto2name(proto)) != NULL)
276 printf("%s ", protoname);
277 else
278 printf("%u ", proto);
279
280 print_host(&nk->addr[1], nk->port[1], nk->af, opts);
281 if (nk->af != sk->af || PF_ANEQ(&nk->addr[1], &sk->addr[1], nk->af) ||
282 nk->port[1] != sk->port[1]) {
283 idx = afto ? 0 : 1;
284 printf(" (");
285 print_host(&sk->addr[idx], sk->port[idx], sk->af,
286 opts);
287 printf(")");
288 }
289 if (s->direction == PF_OUT || (afto && s->direction == PF_IN))
290 printf(" -> ");
291 else
292 printf(" <- ");
293 print_host(&nk->addr[0], nk->port[0], nk->af, opts);
294 if (nk->af != sk->af || PF_ANEQ(&nk->addr[0], &sk->addr[0], nk->af) ||
295 nk->port[0] != sk->port[0]) {
296 idx = afto ? 1 : 0;
297 printf(" (");
298 print_host(&sk->addr[idx], sk->port[idx], sk->af,
299 opts);
300 printf(")");
301 }
302
303 printf(" ");
304 if (proto == IPPROTO_TCP) {
305 if (src->state <= TCPS_TIME_WAIT &&
306 dst->state <= TCPS_TIME_WAIT)
307 printf(" %s:%s\n", tcpstates[src->state],
308 tcpstates[dst->state]);
309 else if (src->state == PF_TCPS_PROXY_SRC ||
310 dst->state == PF_TCPS_PROXY_SRC)
311 printf(" PROXY:SRC\n");
312 else if (src->state == PF_TCPS_PROXY_DST ||
313 dst->state == PF_TCPS_PROXY_DST)
314 printf(" PROXY:DST\n");
315 else
316 printf(" <BAD STATE LEVELS %u:%u>\n",
317 src->state, dst->state);
318 if (opts & PF_OPT_VERBOSE) {
319 printf(" ");
320 print_seq(src);
321 if (src->wscale && dst->wscale)
322 printf(" wscale %u",
323 src->wscale & PF_WSCALE_MASK);
324 printf(" ");
325 print_seq(dst);
326 if (src->wscale && dst->wscale)
327 printf(" wscale %u",
328 dst->wscale & PF_WSCALE_MASK);
329 printf("\n");
330 }
331 } else if (proto == IPPROTO_UDP && src->state < PFUDPS_NSTATES &&
332 dst->state < PFUDPS_NSTATES) {
333 const char *states[] = PFUDPS_NAMES;
334
335 printf(" %s:%s\n", states[src->state], states[dst->state]);
336 } else if (proto == IPPROTO_SCTP) {
337 printf(" %s:%s\n", sctp_state_name(src->state),
338 sctp_state_name(dst->state));
339 #ifndef INET6
340 } else if (proto != IPPROTO_ICMP && src->state < PFOTHERS_NSTATES &&
341 dst->state < PFOTHERS_NSTATES) {
342 #else
343 } else if (proto != IPPROTO_ICMP && proto != IPPROTO_ICMPV6 &&
344 src->state < PFOTHERS_NSTATES && dst->state < PFOTHERS_NSTATES) {
345 #endif
346 /* XXX ICMP doesn't really have state levels */
347 const char *states[] = PFOTHERS_NAMES;
348
349 printf(" %s:%s\n", states[src->state], states[dst->state]);
350 } else {
351 printf(" %u:%u\n", src->state, dst->state);
352 }
353
354 if (opts & PF_OPT_VERBOSE) {
355 u_int32_t creation = s->creation;
356 u_int32_t expire = s->expire;
357
358 sec = creation % 60;
359 creation /= 60;
360 min = creation % 60;
361 creation /= 60;
362 printf(" age %.2u:%.2u:%.2u", creation, min, sec);
363 sec = expire % 60;
364 expire /= 60;
365 min = expire % 60;
366 expire /= 60;
367 printf(", expires in %.2u:%.2u:%.2u", expire, min, sec);
368
369 printf(", %ju:%ju pkts, %ju:%ju bytes",
370 s->packets[0],
371 s->packets[1],
372 s->bytes[0],
373 s->bytes[1]);
374 if (s->anchor != -1)
375 printf(", anchor %u", s->anchor);
376 if (s->rule != -1)
377 printf(", rule %u", s->rule);
378 if (s->state_flags & PFSTATE_ALLOWOPTS)
379 printf(", allow-opts");
380 if (s->state_flags & PFSTATE_SLOPPY)
381 printf(", sloppy");
382 if (s->state_flags & PFSTATE_NOSYNC)
383 printf(", no-sync");
384 if (s->state_flags & PFSTATE_PFLOW)
385 printf(", pflow");
386 if (s->state_flags & PFSTATE_ACK)
387 printf(", psync-ack");
388 if (s->state_flags & PFSTATE_NODF)
389 printf(", no-df");
390 if (s->state_flags & PFSTATE_SETTOS)
391 printf(", set-tos 0x%2.2x", s->set_tos);
392 if (s->state_flags & PFSTATE_RANDOMID)
393 printf(", random-id");
394 if (s->state_flags & PFSTATE_SCRUB_TCP)
395 printf(", reassemble-tcp");
396 if (s->state_flags & PFSTATE_SETPRIO)
397 printf(", set-prio (0x%02x 0x%02x)",
398 s->set_prio[0], s->set_prio[1]);
399 if (s->dnpipe || s->dnrpipe) {
400 if (s->state_flags & PFSTATE_DN_IS_PIPE)
401 printf(", dummynet pipe (%d %d)",
402 s->dnpipe, s->dnrpipe);
403 if (s->state_flags & PFSTATE_DN_IS_QUEUE)
404 printf(", dummynet queue (%d %d)",
405 s->dnpipe, s->dnrpipe);
406 }
407 if (s->src_node_flags & PFSTATE_SRC_NODE_LIMIT)
408 printf(", %s", sn_type_names[PF_SN_LIMIT]);
409 if (s->src_node_flags & PFSTATE_SRC_NODE_LIMIT_GLOBAL)
410 printf(" global");
411 if (s->src_node_flags & PFSTATE_SRC_NODE_NAT)
412 printf(", %s", sn_type_names[PF_SN_NAT]);
413 if (s->src_node_flags & PFSTATE_SRC_NODE_ROUTE)
414 printf(", %s", sn_type_names[PF_SN_ROUTE]);
415 if (s->log)
416 printf(", log");
417 if (s->log & PF_LOG_ALL)
418 printf(" (all)");
419 if (s->min_ttl)
420 printf(", min-ttl %d", s->min_ttl);
421 if (s->max_mss)
422 printf(", max-mss %d", s->max_mss);
423 printf("\n");
424 }
425 if (opts & PF_OPT_VERBOSE2) {
426 u_int64_t id;
427
428 bcopy(&s->id, &id, sizeof(u_int64_t));
429 printf(" id: %016jx creatorid: %08x", id, s->creatorid);
430 if (s->rt) {
431 switch (s->rt) {
432 case PF_ROUTETO:
433 printf(" route-to: ");
434 break;
435 case PF_DUPTO:
436 printf(" dup-to: ");
437 break;
438 case PF_REPLYTO:
439 printf(" reply-to: ");
440 break;
441 default:
442 printf(" gateway: ");
443 }
444 print_host(&s->rt_addr, 0, af, opts);
445 if (s->rt_ifname[0])
446 printf("@%s", s->rt_ifname);
447 }
448 if (s->rtableid != -1)
449 printf(" rtable: %d", s->rtableid);
450 printf("\n");
451
452 if (strcmp(s->ifname, s->orig_ifname) != 0)
453 printf(" origif: %s\n", s->orig_ifname);
454 }
455 }
456
457 int
unmask(struct pf_addr * m,sa_family_t af)458 unmask(struct pf_addr *m, sa_family_t af)
459 {
460 int i = 31, j = 0, b = 0;
461 u_int32_t tmp;
462
463 while (j < 4 && m->addr32[j] == 0xffffffff) {
464 b += 32;
465 j++;
466 }
467 if (j < 4) {
468 tmp = ntohl(m->addr32[j]);
469 for (i = 31; tmp & (1 << i); --i)
470 b++;
471 }
472 return (b);
473 }
474