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 if (af == AF_INET || af == AF_INET6) {
117 int bits = unmask(&addr->v.a.mask);
118 if (bits < (af == AF_INET ? 32 : 128))
119 printf("/%d", bits);
120 }
121 }
122 }
123
124 void
print_addr_str(sa_family_t af,struct pf_addr * addr)125 print_addr_str(sa_family_t af, struct pf_addr *addr)
126 {
127 static char buf[48];
128
129 if (inet_ntop(af, addr, buf, sizeof(buf)) == NULL)
130 printf("?");
131 else
132 printf("%s", buf);
133 }
134
135 void
print_name(struct pf_addr * addr,sa_family_t af)136 print_name(struct pf_addr *addr, sa_family_t af)
137 {
138 struct sockaddr_storage ss;
139 struct sockaddr_in *sin;
140 struct sockaddr_in6 *sin6;
141 char host[NI_MAXHOST];
142
143 memset(&ss, 0, sizeof(ss));
144 ss.ss_family = af;
145 if (ss.ss_family == AF_INET) {
146 sin = (struct sockaddr_in *)&ss;
147 sin->sin_len = sizeof(*sin);
148 sin->sin_addr = addr->v4;
149 } else {
150 sin6 = (struct sockaddr_in6 *)&ss;
151 sin6->sin6_len = sizeof(*sin6);
152 sin6->sin6_addr = addr->v6;
153 }
154
155 if (getnameinfo((struct sockaddr *)&ss, ss.ss_len, host, sizeof(host),
156 NULL, 0, NI_NOFQDN) != 0)
157 printf("?");
158 else
159 printf("%s", host);
160 }
161
162 void
print_host(struct pf_addr * addr,u_int16_t port,sa_family_t af,int opts)163 print_host(struct pf_addr *addr, u_int16_t port, sa_family_t af, int opts)
164 {
165 struct pf_addr_wrap aw;
166
167 if (opts & PF_OPT_USEDNS)
168 print_name(addr, af);
169 else {
170 memset(&aw, 0, sizeof(aw));
171 aw.v.a.addr = *addr;
172 memset(&aw.v.a.mask, 0xff, sizeof(aw.v.a.mask));
173 print_addr(&aw, af, opts & PF_OPT_VERBOSE2);
174 }
175
176 if (port) {
177 if (af == AF_INET)
178 printf(":%u", ntohs(port));
179 else
180 printf("[%u]", ntohs(port));
181 }
182 }
183
184 void
print_seq(struct pfctl_state_peer * p)185 print_seq(struct pfctl_state_peer *p)
186 {
187 if (p->seqdiff)
188 printf("[%u + %u](+%u)", p->seqlo,
189 p->seqhi - p->seqlo, p->seqdiff);
190 else
191 printf("[%u + %u]", p->seqlo,
192 p->seqhi - p->seqlo);
193 }
194
195
196 static const char *
sctp_state_name(int state)197 sctp_state_name(int state)
198 {
199 switch (state) {
200 case SCTP_CLOSED:
201 return ("CLOSED");
202 case SCTP_BOUND:
203 return ("BOUND");
204 case SCTP_LISTEN:
205 return ("LISTEN");
206 case SCTP_COOKIE_WAIT:
207 return ("COOKIE_WAIT");
208 case SCTP_COOKIE_ECHOED:
209 return ("COOKIE_ECHOED");
210 case SCTP_ESTABLISHED:
211 return ("ESTABLISHED");
212 case SCTP_SHUTDOWN_SENT:
213 return ("SHUTDOWN_SENT");
214 case SCTP_SHUTDOWN_RECEIVED:
215 return ("SHUTDOWN_RECEIVED");
216 case SCTP_SHUTDOWN_ACK_SENT:
217 return ("SHUTDOWN_ACK_SENT");
218 case SCTP_SHUTDOWN_PENDING:
219 return ("SHUTDOWN_PENDING");
220 default:
221 return ("?");
222 }
223 }
224
225 void
print_state(struct pfctl_state * s,int opts)226 print_state(struct pfctl_state *s, int opts)
227 {
228 struct pfctl_state_peer *src, *dst;
229 struct pfctl_state_key *key, *sk, *nk;
230 const char *protoname;
231 int min, sec;
232 uint8_t proto;
233 int afto = (s->key[PF_SK_STACK].af != s->key[PF_SK_WIRE].af);
234 int idx;
235 const char *sn_type_names[] = PF_SN_TYPE_NAMES;
236 #ifndef __NO_STRICT_ALIGNMENT
237 struct pfctl_state_key aligned_key[2];
238
239 bcopy(&s->key, aligned_key, sizeof(aligned_key));
240 key = aligned_key;
241 #else
242 key = s->key;
243 #endif
244
245 proto = s->key[PF_SK_WIRE].proto;
246
247 if (s->direction == PF_OUT) {
248 src = &s->src;
249 dst = &s->dst;
250 sk = &key[PF_SK_STACK];
251 nk = &key[PF_SK_WIRE];
252 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6)
253 sk->port[0] = nk->port[0];
254 } else {
255 src = &s->dst;
256 dst = &s->src;
257 sk = &key[PF_SK_WIRE];
258 nk = &key[PF_SK_STACK];
259 if (proto == IPPROTO_ICMP || proto == IPPROTO_ICMPV6)
260 sk->port[1] = nk->port[1];
261 }
262 printf("%s ", s->ifname);
263 if ((protoname = pfctl_proto2name(proto)) != NULL)
264 printf("%s ", protoname);
265 else
266 printf("%u ", proto);
267
268 print_host(&nk->addr[1], nk->port[1], nk->af, opts);
269 if (nk->af != sk->af || PF_ANEQ(&nk->addr[1], &sk->addr[1], nk->af) ||
270 nk->port[1] != sk->port[1]) {
271 idx = afto ? 0 : 1;
272 printf(" (");
273 print_host(&sk->addr[idx], sk->port[idx], sk->af,
274 opts);
275 printf(")");
276 }
277 if (s->direction == PF_OUT || (afto && s->direction == PF_IN))
278 printf(" -> ");
279 else
280 printf(" <- ");
281 print_host(&nk->addr[0], nk->port[0], nk->af, opts);
282 if (nk->af != sk->af || PF_ANEQ(&nk->addr[0], &sk->addr[0], nk->af) ||
283 nk->port[0] != sk->port[0]) {
284 idx = afto ? 1 : 0;
285 printf(" (");
286 print_host(&sk->addr[idx], sk->port[idx], sk->af,
287 opts);
288 printf(")");
289 }
290
291 printf(" ");
292 if (proto == IPPROTO_TCP) {
293 if (src->state <= TCPS_TIME_WAIT &&
294 dst->state <= TCPS_TIME_WAIT)
295 printf(" %s:%s\n", tcpstates[src->state],
296 tcpstates[dst->state]);
297 else if (src->state == PF_TCPS_PROXY_SRC ||
298 dst->state == PF_TCPS_PROXY_SRC)
299 printf(" PROXY:SRC\n");
300 else if (src->state == PF_TCPS_PROXY_DST ||
301 dst->state == PF_TCPS_PROXY_DST)
302 printf(" PROXY:DST\n");
303 else
304 printf(" <BAD STATE LEVELS %u:%u>\n",
305 src->state, dst->state);
306 if (opts & PF_OPT_VERBOSE) {
307 printf(" ");
308 print_seq(src);
309 if (src->wscale && dst->wscale)
310 printf(" wscale %u",
311 src->wscale & PF_WSCALE_MASK);
312 printf(" ");
313 print_seq(dst);
314 if (src->wscale && dst->wscale)
315 printf(" wscale %u",
316 dst->wscale & PF_WSCALE_MASK);
317 printf("\n");
318 }
319 } else if (proto == IPPROTO_UDP && src->state < PFUDPS_NSTATES &&
320 dst->state < PFUDPS_NSTATES) {
321 const char *states[] = PFUDPS_NAMES;
322
323 printf(" %s:%s\n", states[src->state], states[dst->state]);
324 } else if (proto == IPPROTO_SCTP) {
325 printf(" %s:%s\n", sctp_state_name(src->state),
326 sctp_state_name(dst->state));
327 } else if (proto != IPPROTO_ICMP && proto != IPPROTO_ICMPV6 &&
328 src->state < PFOTHERS_NSTATES && dst->state < PFOTHERS_NSTATES) {
329 /* XXX ICMP doesn't really have state levels */
330 const char *states[] = PFOTHERS_NAMES;
331
332 printf(" %s:%s\n", states[src->state], states[dst->state]);
333 } else {
334 printf(" %u:%u\n", src->state, dst->state);
335 }
336
337 if (opts & PF_OPT_VERBOSE) {
338 u_int32_t creation = s->creation;
339 u_int32_t expire = s->expire;
340
341 sec = creation % 60;
342 creation /= 60;
343 min = creation % 60;
344 creation /= 60;
345 printf(" age %.2u:%.2u:%.2u", creation, min, sec);
346 sec = expire % 60;
347 expire /= 60;
348 min = expire % 60;
349 expire /= 60;
350 printf(", expires in %.2u:%.2u:%.2u", expire, min, sec);
351
352 printf(", %ju:%ju pkts, %ju:%ju bytes",
353 s->packets[0],
354 s->packets[1],
355 s->bytes[0],
356 s->bytes[1]);
357 if (s->anchor != -1)
358 printf(", anchor %u", s->anchor);
359 if (s->rule != -1)
360 printf(", rule %u", s->rule);
361 if (s->state_flags & PFSTATE_ALLOWOPTS)
362 printf(", allow-opts");
363 if (s->state_flags & PFSTATE_SLOPPY)
364 printf(", sloppy");
365 if (s->state_flags & PFSTATE_NOSYNC)
366 printf(", no-sync");
367 if (s->state_flags & PFSTATE_PFLOW)
368 printf(", pflow");
369 if (s->state_flags & PFSTATE_ACK)
370 printf(", psync-ack");
371 if (s->state_flags & PFSTATE_NODF)
372 printf(", no-df");
373 if (s->state_flags & PFSTATE_SETTOS)
374 printf(", set-tos 0x%2.2x", s->set_tos);
375 if (s->state_flags & PFSTATE_RANDOMID)
376 printf(", random-id");
377 if (s->state_flags & PFSTATE_SCRUB_TCP)
378 printf(", reassemble-tcp");
379 if (s->state_flags & PFSTATE_SETPRIO)
380 printf(", set-prio (0x%02x 0x%02x)",
381 s->set_prio[0], s->set_prio[1]);
382 if (s->dnpipe || s->dnrpipe) {
383 if (s->state_flags & PFSTATE_DN_IS_PIPE)
384 printf(", dummynet pipe (%d %d)",
385 s->dnpipe, s->dnrpipe);
386 if (s->state_flags & PFSTATE_DN_IS_QUEUE)
387 printf(", dummynet queue (%d %d)",
388 s->dnpipe, s->dnrpipe);
389 }
390 if (s->src_node_flags & PFSTATE_SRC_NODE_LIMIT)
391 printf(", %s", sn_type_names[PF_SN_LIMIT]);
392 if (s->src_node_flags & PFSTATE_SRC_NODE_LIMIT_GLOBAL)
393 printf(" global");
394 if (s->src_node_flags & PFSTATE_SRC_NODE_NAT)
395 printf(", %s", sn_type_names[PF_SN_NAT]);
396 if (s->src_node_flags & PFSTATE_SRC_NODE_ROUTE)
397 printf(", %s", sn_type_names[PF_SN_ROUTE]);
398 if (s->log)
399 printf(", log");
400 if (s->log & PF_LOG_ALL)
401 printf(" (all)");
402 if (s->min_ttl)
403 printf(", min-ttl %d", s->min_ttl);
404 if (s->max_mss)
405 printf(", max-mss %d", s->max_mss);
406 printf("\n");
407 }
408 if (opts & PF_OPT_VERBOSE2) {
409 u_int64_t id;
410
411 bcopy(&s->id, &id, sizeof(u_int64_t));
412 printf(" id: %016jx creatorid: %08x", id, s->creatorid);
413 if (s->rt) {
414 switch (s->rt) {
415 case PF_ROUTETO:
416 printf(" route-to: ");
417 break;
418 case PF_DUPTO:
419 printf(" dup-to: ");
420 break;
421 case PF_REPLYTO:
422 printf(" reply-to: ");
423 break;
424 default:
425 printf(" gateway: ");
426 }
427 print_host(&s->rt_addr, 0, s->rt_af, opts);
428 if (s->rt_ifname[0])
429 printf("@%s", s->rt_ifname);
430 }
431 if (s->rtableid != -1)
432 printf(" rtable: %d", s->rtableid);
433 printf("\n");
434
435 if (strcmp(s->ifname, s->orig_ifname) != 0)
436 printf(" origif: %s\n", s->orig_ifname);
437 }
438 }
439
440 int
unmask(struct pf_addr * m)441 unmask(struct pf_addr *m)
442 {
443 int i = 31, j = 0, b = 0;
444 u_int32_t tmp;
445
446 while (j < 4 && m->addr32[j] == 0xffffffff) {
447 b += 32;
448 j++;
449 }
450 if (j < 4) {
451 tmp = ntohl(m->addr32[j]);
452 for (i = 31; tmp & (1 << i); --i)
453 b++;
454 }
455 return (b);
456 }
457