1 /* $FreeBSD$ */
2 /* $KAME: setkey.c,v 1.28 2003/06/27 07:15:45 itojun Exp $ */
3
4 /*-
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the project nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/types.h>
36 #include <sys/param.h>
37 #include <sys/socket.h>
38 #include <sys/time.h>
39 #include <err.h>
40 #include <net/route.h>
41 #include <netinet/in.h>
42 #include <net/pfkeyv2.h>
43 #include <netipsec/keydb.h>
44 #include <netipsec/key_debug.h>
45 #include <netipsec/ipsec.h>
46
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <limits.h>
50 #include <string.h>
51 #include <ctype.h>
52 #include <unistd.h>
53 #include <errno.h>
54 #include <netdb.h>
55
56 #include "libpfkey.h"
57
58 void usage(void);
59 int main(int, char **);
60 int get_supported(void);
61 void sendkeyshort(u_int, uint8_t);
62 void promisc(void);
63 int sendkeymsg(char *, size_t);
64 int postproc(struct sadb_msg *, int);
65 const char *numstr(int);
66 void shortdump_hdr(void);
67 void shortdump(struct sadb_msg *);
68 static void printdate(void);
69 static int32_t gmt2local(time_t);
70
71 #define MODE_SCRIPT 1
72 #define MODE_CMDDUMP 2
73 #define MODE_CMDFLUSH 3
74 #define MODE_PROMISC 4
75
76 int so;
77
78 int f_forever = 0;
79 int f_all = 0;
80 int f_verbose = 0;
81 int f_mode = 0;
82 int f_cmddump = 0;
83 int f_policy = 0;
84 int f_hexdump = 0;
85 int f_tflag = 0;
86 int f_scope = 0;
87 static time_t thiszone;
88
89 extern int lineno;
90
91 extern int parse(FILE **);
92
93 void
usage()94 usage()
95 {
96
97 printf("usage: setkey [-v] -c\n");
98 printf(" setkey [-v] -f filename\n");
99 printf(" setkey [-Pagltv] -D\n");
100 printf(" setkey [-Pv] -F\n");
101 printf(" setkey [-h] -x\n");
102 exit(1);
103 }
104
105 int
main(ac,av)106 main(ac, av)
107 int ac;
108 char **av;
109 {
110 FILE *fp = stdin;
111 int c;
112
113 if (ac == 1) {
114 usage();
115 /* NOTREACHED */
116 }
117
118 thiszone = gmt2local(0);
119
120 while ((c = getopt(ac, av, "acdf:ghltvxDFP")) != -1) {
121 switch (c) {
122 case 'c':
123 f_mode = MODE_SCRIPT;
124 fp = stdin;
125 break;
126 case 'f':
127 f_mode = MODE_SCRIPT;
128 if ((fp = fopen(optarg, "r")) == NULL) {
129 err(-1, "fopen");
130 /*NOTREACHED*/
131 }
132 break;
133 case 'D':
134 f_mode = MODE_CMDDUMP;
135 break;
136 case 'F':
137 f_mode = MODE_CMDFLUSH;
138 break;
139 case 'a':
140 f_all = 1;
141 break;
142 case 'l':
143 f_forever = 1;
144 break;
145 case 'h':
146 f_hexdump = 1;
147 break;
148 case 'x':
149 f_mode = MODE_PROMISC;
150 f_tflag++;
151 break;
152 case 'P':
153 f_policy = 1;
154 break;
155 case 'g': /* global */
156 f_scope |= IPSEC_POLICYSCOPE_GLOBAL;
157 break;
158 case 't': /* tunnel */
159 f_scope |= IPSEC_POLICYSCOPE_IFNET;
160 break;
161 case 'v':
162 f_verbose = 1;
163 break;
164 default:
165 usage();
166 /*NOTREACHED*/
167 }
168 }
169
170 so = pfkey_open();
171 if (so < 0) {
172 perror("pfkey_open");
173 exit(1);
174 }
175
176 switch (f_mode) {
177 case MODE_CMDDUMP:
178 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP,
179 f_policy ? f_scope: SADB_SATYPE_UNSPEC);
180 break;
181 case MODE_CMDFLUSH:
182 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH,
183 SADB_SATYPE_UNSPEC);
184 break;
185 case MODE_SCRIPT:
186 if (get_supported() < 0) {
187 errx(-1, "%s", ipsec_strerror());
188 /*NOTREACHED*/
189 }
190 if (parse(&fp))
191 exit (1);
192 break;
193 case MODE_PROMISC:
194 promisc();
195 /*NOTREACHED*/
196 default:
197 usage();
198 /*NOTREACHED*/
199 }
200
201 exit(0);
202 }
203
204 int
get_supported()205 get_supported()
206 {
207
208 if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
209 return -1;
210
211 if (pfkey_recv_register(so) < 0)
212 return -1;
213
214 return 0;
215 }
216
217 void
sendkeyshort(u_int type,uint8_t satype)218 sendkeyshort(u_int type, uint8_t satype)
219 {
220 struct sadb_msg msg;
221
222 msg.sadb_msg_version = PF_KEY_V2;
223 msg.sadb_msg_type = type;
224 msg.sadb_msg_errno = 0;
225 msg.sadb_msg_satype = satype;
226 msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
227 msg.sadb_msg_reserved = 0;
228 msg.sadb_msg_seq = 0;
229 msg.sadb_msg_pid = getpid();
230
231 sendkeymsg((char *)&msg, sizeof(msg));
232
233 return;
234 }
235
236 void
promisc()237 promisc()
238 {
239 struct sadb_msg msg;
240 u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
241 ssize_t l;
242
243 msg.sadb_msg_version = PF_KEY_V2;
244 msg.sadb_msg_type = SADB_X_PROMISC;
245 msg.sadb_msg_errno = 0;
246 msg.sadb_msg_satype = 1;
247 msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
248 msg.sadb_msg_reserved = 0;
249 msg.sadb_msg_seq = 0;
250 msg.sadb_msg_pid = getpid();
251
252 if ((l = send(so, &msg, sizeof(msg), 0)) < 0) {
253 err(1, "send");
254 /*NOTREACHED*/
255 }
256
257 while (1) {
258 struct sadb_msg *base;
259
260 if ((l = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
261 err(1, "recv");
262 /*NOTREACHED*/
263 }
264
265 if (l != sizeof(*base))
266 continue;
267
268 base = (struct sadb_msg *)rbuf;
269 if ((l = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
270 0)) < 0) {
271 err(1, "recv");
272 /*NOTREACHED*/
273 }
274 printdate();
275 if (f_hexdump) {
276 int i;
277 for (i = 0; i < l; i++) {
278 if (i % 16 == 0)
279 printf("%08x: ", i);
280 printf("%02x ", rbuf[i] & 0xff);
281 if (i % 16 == 15)
282 printf("\n");
283 }
284 if (l % 16)
285 printf("\n");
286 }
287 /* adjust base pointer for promisc mode */
288 if (base->sadb_msg_type == SADB_X_PROMISC) {
289 if ((ssize_t)sizeof(*base) < l)
290 base++;
291 else
292 base = NULL;
293 }
294 if (base) {
295 kdebug_sadb(base);
296 printf("\n");
297 fflush(stdout);
298 }
299 }
300 }
301
302 int
sendkeymsg(buf,len)303 sendkeymsg(buf, len)
304 char *buf;
305 size_t len;
306 {
307 u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
308 ssize_t l;
309 struct sadb_msg *msg;
310
311 {
312 struct timeval tv;
313 tv.tv_sec = 1;
314 tv.tv_usec = 0;
315 if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
316 perror("setsockopt");
317 goto end;
318 }
319 }
320
321 if (f_forever)
322 shortdump_hdr();
323 again:
324 if (f_verbose) {
325 kdebug_sadb((struct sadb_msg *)buf);
326 printf("\n");
327 }
328 if (f_hexdump) {
329 int i;
330 for (i = 0; i < len; i++) {
331 if (i % 16 == 0)
332 printf("%08x: ", i);
333 printf("%02x ", buf[i] & 0xff);
334 if (i % 16 == 15)
335 printf("\n");
336 }
337 if (len % 16)
338 printf("\n");
339 }
340
341 if ((l = send(so, buf, len, 0)) < 0) {
342 perror("send");
343 goto end;
344 }
345
346 msg = (struct sadb_msg *)rbuf;
347 do {
348 if ((l = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
349 perror("recv");
350 goto end;
351 }
352
353 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != l) {
354 warnx("invalid keymsg length");
355 break;
356 }
357
358 if (f_verbose) {
359 kdebug_sadb((struct sadb_msg *)rbuf);
360 printf("\n");
361 }
362 if (postproc(msg, l) < 0)
363 break;
364 } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
365
366 if (f_forever) {
367 fflush(stdout);
368 sleep(1);
369 goto again;
370 }
371
372 end:
373 return(0);
374 }
375
376 int
postproc(msg,len)377 postproc(msg, len)
378 struct sadb_msg *msg;
379 int len;
380 {
381
382 if (msg->sadb_msg_errno != 0) {
383 char inf[80];
384 const char *errmsg = NULL;
385
386 if (f_mode == MODE_SCRIPT)
387 snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
388 else
389 inf[0] = '\0';
390
391 switch (msg->sadb_msg_errno) {
392 case ENOENT:
393 switch (msg->sadb_msg_type) {
394 case SADB_DELETE:
395 case SADB_GET:
396 case SADB_X_SPDDELETE:
397 errmsg = "No entry";
398 break;
399 case SADB_DUMP:
400 errmsg = "No SAD entries";
401 break;
402 case SADB_X_SPDDUMP:
403 errmsg = "No SPD entries";
404 break;
405 }
406 break;
407 default:
408 errmsg = strerror(msg->sadb_msg_errno);
409 }
410 printf("%s%s.\n", inf, errmsg);
411 return(-1);
412 }
413
414 switch (msg->sadb_msg_type) {
415 case SADB_GET:
416 pfkey_sadump(msg);
417 break;
418
419 case SADB_DUMP:
420 /* filter out DEAD SAs */
421 if (!f_all) {
422 caddr_t mhp[SADB_EXT_MAX + 1];
423 struct sadb_sa *sa;
424 pfkey_align(msg, mhp);
425 pfkey_check(mhp);
426 if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
427 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
428 break;
429 }
430 }
431 if (f_forever)
432 shortdump(msg);
433 else
434 pfkey_sadump(msg);
435 msg = (struct sadb_msg *)((caddr_t)msg +
436 PFKEY_UNUNIT64(msg->sadb_msg_len));
437 if (f_verbose) {
438 kdebug_sadb((struct sadb_msg *)msg);
439 printf("\n");
440 }
441 break;
442
443 case SADB_X_SPDDUMP:
444 pfkey_spdump(msg);
445 if (msg->sadb_msg_seq == 0) break;
446 msg = (struct sadb_msg *)((caddr_t)msg +
447 PFKEY_UNUNIT64(msg->sadb_msg_len));
448 if (f_verbose) {
449 kdebug_sadb((struct sadb_msg *)msg);
450 printf("\n");
451 }
452 break;
453 }
454
455 return(0);
456 }
457
458 /*------------------------------------------------------------*/
459 static const char *satype[] = {
460 NULL, NULL, "ah", "esp"
461 };
462 static const char *sastate[] = {
463 "L", "M", "D", "d"
464 };
465 static const char *ipproto[] = {
466 /*0*/ "ip", "icmp", "igmp", "ggp", "ip4",
467 NULL, "tcp", NULL, "egp", NULL,
468 /*10*/ NULL, NULL, NULL, NULL, NULL,
469 NULL, NULL, "udp", NULL, NULL,
470 /*20*/ NULL, NULL, "idp", NULL, NULL,
471 NULL, NULL, NULL, NULL, "tp",
472 /*30*/ NULL, NULL, NULL, NULL, NULL,
473 NULL, NULL, NULL, NULL, NULL,
474 /*40*/ NULL, "ip6", NULL, "rt6", "frag6",
475 NULL, "rsvp", "gre", NULL, NULL,
476 /*50*/ "esp", "ah", NULL, NULL, NULL,
477 NULL, NULL, NULL, "icmp6", "none",
478 /*60*/ "dst6",
479 };
480
481 #define STR_OR_ID(x, tab) \
482 (((x) < sizeof(tab)/sizeof(tab[0]) && tab[(x)]) ? tab[(x)] : numstr(x))
483
484 const char *
numstr(x)485 numstr(x)
486 int x;
487 {
488 static char buf[20];
489 snprintf(buf, sizeof(buf), "#%d", x);
490 return buf;
491 }
492
493 void
shortdump_hdr()494 shortdump_hdr()
495 {
496 printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
497 "time", "p", "s", "spi", "ltime", "src", "dst");
498 }
499
500 void
shortdump(msg)501 shortdump(msg)
502 struct sadb_msg *msg;
503 {
504 caddr_t mhp[SADB_EXT_MAX + 1];
505 char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
506 struct sadb_sa *sa;
507 struct sadb_address *saddr;
508 struct sadb_lifetime *lts, *lth, *ltc;
509 struct sockaddr *s;
510 u_int t;
511 time_t cur = time(0);
512
513 pfkey_align(msg, mhp);
514 pfkey_check(mhp);
515
516 printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
517
518 printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
519
520 if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
521 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
522 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
523 } else
524 printf("%-1s %-8s", "?", "?");
525
526 lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
527 lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
528 ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
529 if (lts && lth && ltc) {
530 if (ltc->sadb_lifetime_addtime == 0)
531 t = (u_long)0;
532 else
533 t = (u_long)(cur - ltc->sadb_lifetime_addtime);
534 if (t >= 1000)
535 strlcpy(buf, " big/", sizeof(buf));
536 else
537 snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
538 printf("%s", buf);
539
540 t = (u_long)lth->sadb_lifetime_addtime;
541 if (t >= 1000)
542 strlcpy(buf, "big", sizeof(buf));
543 else
544 snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
545 printf("%s", buf);
546 } else
547 printf(" ??\?/???"); /* backslash to avoid trigraph ??/ */
548
549 printf(" ");
550
551 if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
552 if (saddr->sadb_address_proto)
553 printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
554 s = (struct sockaddr *)(saddr + 1);
555 getnameinfo(s, s->sa_len, buf, sizeof(buf),
556 pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
557 if (strcmp(pbuf, "0") != 0)
558 printf("%s[%s]", buf, pbuf);
559 else
560 printf("%s", buf);
561 } else
562 printf("?");
563
564 printf(" -> ");
565
566 if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
567 if (saddr->sadb_address_proto)
568 printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
569
570 s = (struct sockaddr *)(saddr + 1);
571 getnameinfo(s, s->sa_len, buf, sizeof(buf),
572 pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
573 if (strcmp(pbuf, "0") != 0)
574 printf("%s[%s]", buf, pbuf);
575 else
576 printf("%s", buf);
577 } else
578 printf("?");
579
580 printf("\n");
581 }
582
583 /* From: tcpdump(1):gmt2local.c and util.c */
584 /*
585 * Print the timestamp
586 */
587 static void
printdate()588 printdate()
589 {
590 struct timeval tp;
591 int s;
592
593 if (gettimeofday(&tp, NULL) == -1) {
594 perror("gettimeofday");
595 return;
596 }
597
598 if (f_tflag == 1) {
599 /* Default */
600 s = (tp.tv_sec + thiszone ) % 86400;
601 (void)printf("%02d:%02d:%02d.%06u ",
602 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
603 } else if (f_tflag > 1) {
604 /* Unix timeval style */
605 (void)printf("%u.%06u ",
606 (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
607 }
608
609 printf("\n");
610 }
611
612 /*
613 * Returns the difference between gmt and local time in seconds.
614 * Use gmtime() and localtime() to keep things simple.
615 */
616 int32_t
gmt2local(time_t t)617 gmt2local(time_t t)
618 {
619 register int dt, dir;
620 register struct tm *gmt, *loc;
621 struct tm sgmt;
622
623 if (t == 0)
624 t = time(NULL);
625 gmt = &sgmt;
626 *gmt = *gmtime(&t);
627 loc = localtime(&t);
628 dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
629 (loc->tm_min - gmt->tm_min) * 60;
630
631 /*
632 * If the year or julian day is different, we span 00:00 GMT
633 * and must add or subtract a day. Check the year first to
634 * avoid problems when the julian day wraps.
635 */
636 dir = loc->tm_year - gmt->tm_year;
637 if (dir == 0)
638 dir = loc->tm_yday - gmt->tm_yday;
639 dt += dir * 24 * 60 * 60;
640
641 return (dt);
642 }
643