1 /* $KAME: setkey.c,v 1.28 2003/06/27 07:15:45 itojun Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
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 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include <sys/types.h>
35 #include <sys/param.h>
36 #include <sys/linker.h>
37 #include <sys/module.h>
38 #include <sys/socket.h>
39 #include <sys/time.h>
40 #include <err.h>
41 #include <net/route.h>
42 #include <netinet/in.h>
43 #include <net/pfkeyv2.h>
44 #include <netipsec/keydb.h>
45 #include <netipsec/key_debug.h>
46 #include <netipsec/ipsec.h>
47
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <limits.h>
51 #include <string.h>
52 #include <ctype.h>
53 #include <unistd.h>
54 #include <errno.h>
55 #include <netdb.h>
56
57 #include "libpfkey.h"
58
59 void usage(void);
60 int main(int, char **);
61 int get_supported(void);
62 void sendkeyshort(u_int, uint8_t);
63 void promisc(void);
64 int sendkeymsg(char *, size_t);
65 int postproc(struct sadb_msg *);
66 const char *numstr(int);
67 void shortdump_hdr(void);
68 void shortdump(struct sadb_msg *);
69 static void printdate(void);
70 static int32_t gmt2local(time_t);
71 static int modload(const char *name);
72
73 #define MODE_SCRIPT 1
74 #define MODE_CMDDUMP 2
75 #define MODE_CMDFLUSH 3
76 #define MODE_PROMISC 4
77
78 static int so;
79
80 static int f_forever = 0;
81 static int f_all = 0;
82 static int f_verbose = 0;
83 static int f_mode = 0;
84 static int f_cmddump = 0;
85 static int f_policy = 0;
86 static int f_hexdump = 0;
87 static int f_tflag = 0;
88 static int f_scope = 0;
89 static time_t thiszone;
90
91 extern int lineno;
92
93 extern int parse(FILE **);
94
95 void
usage(void)96 usage(void)
97 {
98
99 printf("usage: setkey [-v] -c\n");
100 printf(" setkey [-v] -f filename\n");
101 printf(" setkey [-v] -e \"<script>\"\n");
102 printf(" setkey [-Pagltv] -D\n");
103 printf(" setkey [-Pv] -F\n");
104 printf(" setkey [-h] -x\n");
105 exit(1);
106 }
107
108 static int
modload(const char * name)109 modload(const char *name)
110 {
111 if (modfind(name) < 0)
112 if (kldload(name) < 0 || modfind(name) < 0) {
113 warn("%s: module not found", name);
114 return 0;
115 }
116 return 1;
117 }
118
119 int
main(int ac,char ** av)120 main(int ac, char **av)
121 {
122 FILE *fp = stdin;
123 int c;
124
125 if (ac == 1) {
126 usage();
127 /* NOTREACHED */
128 }
129
130 thiszone = gmt2local(0);
131
132 while ((c = getopt(ac, av, "acde:f:ghltvxDFP")) != -1) {
133 switch (c) {
134 case 'c':
135 f_mode = MODE_SCRIPT;
136 fp = stdin;
137 break;
138 case 'e':
139 if (fp != stdin) {
140 err(-1, "only one -f/-e option is accepted");
141 }
142 f_mode = MODE_SCRIPT;
143 fp = fmemopen(optarg, strlen(optarg), "r");
144 if (fp == NULL) {
145 err(-1, "fmemopen");
146 /*NOTREACHED*/
147 }
148 break;
149 case 'f':
150 if (fp != stdin) {
151 err(-1, "only one -f/-e option is accepted");
152 }
153 f_mode = MODE_SCRIPT;
154 if ((fp = fopen(optarg, "r")) == NULL) {
155 err(-1, "fopen");
156 /*NOTREACHED*/
157 }
158 break;
159 case 'D':
160 f_mode = MODE_CMDDUMP;
161 break;
162 case 'F':
163 f_mode = MODE_CMDFLUSH;
164 break;
165 case 'a':
166 f_all = 1;
167 break;
168 case 'l':
169 f_forever = 1;
170 break;
171 case 'h':
172 f_hexdump = 1;
173 break;
174 case 'x':
175 f_mode = MODE_PROMISC;
176 f_tflag++;
177 break;
178 case 'P':
179 f_policy = 1;
180 break;
181 case 'g': /* global */
182 f_scope |= IPSEC_POLICYSCOPE_GLOBAL;
183 break;
184 case 't': /* tunnel */
185 f_scope |= IPSEC_POLICYSCOPE_IFNET;
186 break;
187 case 'v':
188 f_verbose = 1;
189 break;
190 default:
191 usage();
192 /*NOTREACHED*/
193 }
194 }
195
196 modload("ipsec");
197 so = pfkey_open();
198 if (so < 0) {
199 perror("pfkey_open");
200 exit(1);
201 }
202
203 switch (f_mode) {
204 case MODE_CMDDUMP:
205 sendkeyshort(f_policy ? SADB_X_SPDDUMP: SADB_DUMP,
206 f_policy ? f_scope: SADB_SATYPE_UNSPEC);
207 break;
208 case MODE_CMDFLUSH:
209 sendkeyshort(f_policy ? SADB_X_SPDFLUSH: SADB_FLUSH,
210 SADB_SATYPE_UNSPEC);
211 break;
212 case MODE_SCRIPT:
213 if (get_supported() < 0) {
214 errx(-1, "%s", ipsec_strerror());
215 /*NOTREACHED*/
216 }
217 if (parse(&fp))
218 exit (1);
219 break;
220 case MODE_PROMISC:
221 promisc();
222 /*NOTREACHED*/
223 default:
224 usage();
225 /*NOTREACHED*/
226 }
227
228 exit(0);
229 }
230
231 int
get_supported(void)232 get_supported(void)
233 {
234
235 if (pfkey_send_register(so, SADB_SATYPE_UNSPEC) < 0)
236 return -1;
237
238 if (pfkey_recv_register(so) < 0)
239 return -1;
240
241 return 0;
242 }
243
244 void
sendkeyshort(u_int type,uint8_t satype)245 sendkeyshort(u_int type, uint8_t satype)
246 {
247 struct sadb_msg msg;
248
249 msg.sadb_msg_version = PF_KEY_V2;
250 msg.sadb_msg_type = type;
251 msg.sadb_msg_errno = 0;
252 msg.sadb_msg_satype = satype;
253 msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
254 msg.sadb_msg_reserved = 0;
255 msg.sadb_msg_seq = 0;
256 msg.sadb_msg_pid = getpid();
257
258 sendkeymsg((char *)&msg, sizeof(msg));
259
260 return;
261 }
262
263 void
promisc(void)264 promisc(void)
265 {
266 struct sadb_msg msg;
267 u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
268 ssize_t l;
269
270 msg.sadb_msg_version = PF_KEY_V2;
271 msg.sadb_msg_type = SADB_X_PROMISC;
272 msg.sadb_msg_errno = 0;
273 msg.sadb_msg_satype = 1;
274 msg.sadb_msg_len = PFKEY_UNIT64(sizeof(msg));
275 msg.sadb_msg_reserved = 0;
276 msg.sadb_msg_seq = 0;
277 msg.sadb_msg_pid = getpid();
278
279 if ((l = send(so, &msg, sizeof(msg), 0)) < 0) {
280 err(1, "send");
281 /*NOTREACHED*/
282 }
283
284 while (1) {
285 struct sadb_msg *base;
286
287 if ((l = recv(so, rbuf, sizeof(*base), MSG_PEEK)) < 0) {
288 err(1, "recv");
289 /*NOTREACHED*/
290 }
291
292 if (l != sizeof(*base))
293 continue;
294
295 base = (struct sadb_msg *)rbuf;
296 if ((l = recv(so, rbuf, PFKEY_UNUNIT64(base->sadb_msg_len),
297 0)) < 0) {
298 err(1, "recv");
299 /*NOTREACHED*/
300 }
301 printdate();
302 if (f_hexdump) {
303 int i;
304 for (i = 0; i < l; i++) {
305 if (i % 16 == 0)
306 printf("%08x: ", i);
307 printf("%02x ", rbuf[i] & 0xff);
308 if (i % 16 == 15)
309 printf("\n");
310 }
311 if (l % 16)
312 printf("\n");
313 }
314 /* adjust base pointer for promisc mode */
315 if (base->sadb_msg_type == SADB_X_PROMISC) {
316 if ((ssize_t)sizeof(*base) < l)
317 base++;
318 else
319 base = NULL;
320 }
321 if (base) {
322 kdebug_sadb(base);
323 printf("\n");
324 fflush(stdout);
325 }
326 }
327 }
328
329 int
sendkeymsg(char * buf,size_t len)330 sendkeymsg(char *buf, size_t len)
331 {
332 u_char rbuf[1024 * 32]; /* XXX: Enough ? Should I do MSG_PEEK ? */
333 ssize_t l;
334 struct sadb_msg *msg;
335
336 {
337 struct timeval tv;
338 tv.tv_sec = 1;
339 tv.tv_usec = 0;
340 if (setsockopt(so, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)) < 0) {
341 perror("setsockopt");
342 goto end;
343 }
344 }
345
346 if (f_forever)
347 shortdump_hdr();
348 again:
349 if (f_verbose) {
350 kdebug_sadb((struct sadb_msg *)buf);
351 printf("\n");
352 }
353 if (f_hexdump) {
354 size_t i;
355 for (i = 0; i < len; i++) {
356 if (i % 16 == 0)
357 printf("%08x: ", (u_int)i);
358 printf("%02x ", buf[i] & 0xff);
359 if (i % 16 == 15)
360 printf("\n");
361 }
362 if (len % 16)
363 printf("\n");
364 }
365
366 if ((l = send(so, buf, len, 0)) < 0) {
367 perror("send");
368 goto end;
369 }
370
371 msg = (struct sadb_msg *)rbuf;
372 do {
373 if ((l = recv(so, rbuf, sizeof(rbuf), 0)) < 0) {
374 perror("recv");
375 goto end;
376 }
377
378 if (PFKEY_UNUNIT64(msg->sadb_msg_len) != l) {
379 warnx("invalid keymsg length");
380 break;
381 }
382
383 if (f_verbose) {
384 kdebug_sadb((struct sadb_msg *)rbuf);
385 printf("\n");
386 }
387 if (postproc(msg) < 0)
388 break;
389 } while (msg->sadb_msg_errno || msg->sadb_msg_seq);
390
391 if (f_forever) {
392 fflush(stdout);
393 sleep(1);
394 goto again;
395 }
396
397 end:
398 return(0);
399 }
400
401 int
postproc(struct sadb_msg * msg)402 postproc(struct sadb_msg *msg)
403 {
404
405 if (msg->sadb_msg_errno != 0) {
406 char inf[80];
407 const char *errmsg = NULL;
408
409 if (f_mode == MODE_SCRIPT)
410 snprintf(inf, sizeof(inf), "The result of line %d: ", lineno);
411 else
412 inf[0] = '\0';
413
414 switch (msg->sadb_msg_errno) {
415 case ENOENT:
416 switch (msg->sadb_msg_type) {
417 case SADB_DELETE:
418 case SADB_GET:
419 case SADB_X_SPDDELETE:
420 errmsg = "No entry";
421 break;
422 case SADB_DUMP:
423 errmsg = "No SAD entries";
424 break;
425 case SADB_X_SPDDUMP:
426 errmsg = "No SPD entries";
427 break;
428 }
429 break;
430 default:
431 errmsg = strerror(msg->sadb_msg_errno);
432 }
433 printf("%s%s.\n", inf, errmsg);
434 return(-1);
435 }
436
437 switch (msg->sadb_msg_type) {
438 case SADB_GET:
439 pfkey_sadump(msg);
440 break;
441
442 case SADB_DUMP:
443 /* filter out DEAD SAs */
444 if (!f_all) {
445 caddr_t mhp[SADB_EXT_MAX + 1];
446 struct sadb_sa *sa;
447 pfkey_align(msg, mhp);
448 pfkey_check(mhp);
449 if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
450 if (sa->sadb_sa_state == SADB_SASTATE_DEAD)
451 break;
452 }
453 }
454 if (f_forever)
455 shortdump(msg);
456 else
457 pfkey_sadump(msg);
458 msg = (struct sadb_msg *)((caddr_t)msg +
459 PFKEY_UNUNIT64(msg->sadb_msg_len));
460 if (f_verbose) {
461 kdebug_sadb((struct sadb_msg *)msg);
462 printf("\n");
463 }
464 break;
465
466 case SADB_X_SPDDUMP:
467 pfkey_spdump(msg);
468 if (msg->sadb_msg_seq == 0) break;
469 msg = (struct sadb_msg *)((caddr_t)msg +
470 PFKEY_UNUNIT64(msg->sadb_msg_len));
471 if (f_verbose) {
472 kdebug_sadb((struct sadb_msg *)msg);
473 printf("\n");
474 }
475 break;
476 }
477
478 return(0);
479 }
480
481 /*------------------------------------------------------------*/
482 static const char *satype[] = {
483 NULL, NULL, "ah", "esp"
484 };
485 static const char *sastate[] = {
486 "L", "M", "D", "d"
487 };
488 static const char *ipproto[] = {
489 /*0*/ "ip", "icmp", "igmp", "ggp", "ip4",
490 NULL, "tcp", NULL, "egp", NULL,
491 /*10*/ NULL, NULL, NULL, NULL, NULL,
492 NULL, NULL, "udp", NULL, NULL,
493 /*20*/ NULL, NULL, "idp", NULL, NULL,
494 NULL, NULL, NULL, NULL, "tp",
495 /*30*/ NULL, NULL, NULL, NULL, NULL,
496 NULL, NULL, NULL, NULL, NULL,
497 /*40*/ NULL, "ip6", NULL, "rt6", "frag6",
498 NULL, "rsvp", "gre", NULL, NULL,
499 /*50*/ "esp", "ah", NULL, NULL, NULL,
500 NULL, NULL, NULL, "icmp6", "none",
501 /*60*/ "dst6",
502 };
503
504 #define STR_OR_ID(x, tab) \
505 (((x) < nitems(tab) && tab[(x)]) ? tab[(x)] : numstr(x))
506
507 const char *
numstr(int x)508 numstr(int x)
509 {
510 static char buf[20];
511 snprintf(buf, sizeof(buf), "#%d", x);
512 return buf;
513 }
514
515 void
shortdump_hdr(void)516 shortdump_hdr(void)
517 {
518 printf("%-4s %-3s %-1s %-8s %-7s %s -> %s\n",
519 "time", "p", "s", "spi", "ltime", "src", "dst");
520 }
521
522 void
shortdump(struct sadb_msg * msg)523 shortdump(struct sadb_msg *msg)
524 {
525 caddr_t mhp[SADB_EXT_MAX + 1];
526 char buf[NI_MAXHOST], pbuf[NI_MAXSERV];
527 struct sadb_sa *sa;
528 struct sadb_address *saddr;
529 struct sadb_lifetime *lts, *lth, *ltc;
530 struct sockaddr *s;
531 u_int t;
532 time_t cur = time(0);
533
534 pfkey_align(msg, mhp);
535 pfkey_check(mhp);
536
537 printf("%02lu%02lu", (u_long)(cur % 3600) / 60, (u_long)(cur % 60));
538
539 printf(" %-3s", STR_OR_ID(msg->sadb_msg_satype, satype));
540
541 if ((sa = (struct sadb_sa *)mhp[SADB_EXT_SA]) != NULL) {
542 printf(" %-1s", STR_OR_ID(sa->sadb_sa_state, sastate));
543 printf(" %08x", (u_int32_t)ntohl(sa->sadb_sa_spi));
544 } else
545 printf("%-1s %-8s", "?", "?");
546
547 lts = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_SOFT];
548 lth = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_HARD];
549 ltc = (struct sadb_lifetime *)mhp[SADB_EXT_LIFETIME_CURRENT];
550 if (lts && lth && ltc) {
551 if (ltc->sadb_lifetime_addtime == 0)
552 t = (u_long)0;
553 else
554 t = (u_long)(cur - ltc->sadb_lifetime_addtime);
555 if (t >= 1000)
556 strlcpy(buf, " big/", sizeof(buf));
557 else
558 snprintf(buf, sizeof(buf), " %3lu/", (u_long)t);
559 printf("%s", buf);
560
561 t = (u_long)lth->sadb_lifetime_addtime;
562 if (t >= 1000)
563 strlcpy(buf, "big", sizeof(buf));
564 else
565 snprintf(buf, sizeof(buf), "%-3lu", (u_long)t);
566 printf("%s", buf);
567 } else
568 printf(" ??\?/???"); /* backslash to avoid trigraph ??/ */
569
570 printf(" ");
571
572 if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_SRC]) != NULL) {
573 if (saddr->sadb_address_proto)
574 printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
575 s = (struct sockaddr *)(saddr + 1);
576 getnameinfo(s, s->sa_len, buf, sizeof(buf),
577 pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
578 if (strcmp(pbuf, "0") != 0)
579 printf("%s[%s]", buf, pbuf);
580 else
581 printf("%s", buf);
582 } else
583 printf("?");
584
585 printf(" -> ");
586
587 if ((saddr = (struct sadb_address *)mhp[SADB_EXT_ADDRESS_DST]) != NULL) {
588 if (saddr->sadb_address_proto)
589 printf("%s ", STR_OR_ID(saddr->sadb_address_proto, ipproto));
590
591 s = (struct sockaddr *)(saddr + 1);
592 getnameinfo(s, s->sa_len, buf, sizeof(buf),
593 pbuf, sizeof(pbuf), NI_NUMERICHOST|NI_NUMERICSERV);
594 if (strcmp(pbuf, "0") != 0)
595 printf("%s[%s]", buf, pbuf);
596 else
597 printf("%s", buf);
598 } else
599 printf("?");
600
601 printf("\n");
602 }
603
604 /* From: tcpdump(1):gmt2local.c and util.c */
605 /*
606 * Print the timestamp
607 */
608 static void
printdate(void)609 printdate(void)
610 {
611 struct timeval tp;
612 int s;
613
614 if (gettimeofday(&tp, NULL) == -1) {
615 perror("gettimeofday");
616 return;
617 }
618
619 if (f_tflag == 1) {
620 /* Default */
621 s = (tp.tv_sec + thiszone ) % 86400;
622 (void)printf("%02d:%02d:%02d.%06u ",
623 s / 3600, (s % 3600) / 60, s % 60, (u_int32_t)tp.tv_usec);
624 } else if (f_tflag > 1) {
625 /* Unix timeval style */
626 (void)printf("%u.%06u ",
627 (u_int32_t)tp.tv_sec, (u_int32_t)tp.tv_usec);
628 }
629
630 printf("\n");
631 }
632
633 /*
634 * Returns the difference between gmt and local time in seconds.
635 * Use gmtime() and localtime() to keep things simple.
636 */
637 int32_t
gmt2local(time_t t)638 gmt2local(time_t t)
639 {
640 register int dt, dir;
641 register struct tm *gmt, *loc;
642 struct tm sgmt;
643
644 if (t == 0)
645 t = time(NULL);
646 gmt = &sgmt;
647 *gmt = *gmtime(&t);
648 loc = localtime(&t);
649 dt = (loc->tm_hour - gmt->tm_hour) * 60 * 60 +
650 (loc->tm_min - gmt->tm_min) * 60;
651
652 /*
653 * If the year or julian day is different, we span 00:00 GMT
654 * and must add or subtract a day. Check the year first to
655 * avoid problems when the julian day wraps.
656 */
657 dir = loc->tm_year - gmt->tm_year;
658 if (dir == 0)
659 dir = loc->tm_yday - gmt->tm_yday;
660 dt += dir * 24 * 60 * 60;
661
662 return (dt);
663 }
664