1 /* $USAGI: ninfod.c,v 1.34 2003-01-15 06:41:23 mk Exp $ */
2 /*
3 * Copyright (C) 2002 USAGI/WIDE Project.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the project nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30 /*
31 * Author:
32 * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
33 */
34
35 #if HAVE_CONFIG_H
36 #include "config.h"
37 #endif
38
39 #if HAVE_SYS_TYPES_H
40 # include <sys/types.h>
41 #endif
42 #if STDC_HEADERS
43 # include <stdio.h>
44 # include <stdlib.h>
45 # include <stddef.h>
46 # include <stdarg.h>
47 #else
48 # if HAVE_STDLIB_H
49 # include <stdlib.h>
50 # endif
51 #endif
52
53 #if HAVE_STRING_H
54 # if !STDC_HEADERS && HAVE_MEMORY_H
55 # include <memory.h>
56 # endif
57 # include <string.h>
58 #endif
59 #if HAVE_STRINGS_H
60 # include <strings.h>
61 #endif
62 #if HAVE_INTTYPES_H
63 # include <inttypes.h>
64 #else
65 # if HAVE_STDINT_H
66 # include <stdint.h>
67 # endif
68 #endif
69 #if HAVE_LIMITS_H
70 # include <limits.h>
71 #endif
72 #if HAVE_UNISTD_H
73 # include <unistd.h>
74 #endif
75
76 #ifdef TIME_WITH_SYS_TIME
77 # include <sys/time.h>
78 # include <time.h>
79 #else
80 # ifdef HAVE_SYS_TIME_H
81 # include <sys/time.h>
82 # else
83 # include <time.h>
84 # endif
85 #endif
86
87 #if HAVE_SYS_UIO_H
88 #include <sys/uio.h>
89 #endif
90
91 #include <sys/socket.h>
92
93 #if HAVE_NETINET_IN_H
94 # include <netinet/in.h>
95 #endif
96
97 #if HAVE_NETINET_ICMP6_H
98 # include <netinet/icmp6.h>
99 #endif
100 #ifndef HAVE_STRUCT_ICMP6_NODEINFO
101 # include "icmp6_nodeinfo.h"
102 #endif
103
104 #if HAVE_NETDB_H
105 # include <netdb.h>
106 #endif
107 #include <errno.h>
108
109 #include <signal.h>
110
111 #if HAVE_SYSLOG_H
112 # include <syslog.h>
113 #endif
114
115 #if HAVE_PWD_H
116 # include <pwd.h>
117 #endif
118
119 #if HAVE_SYS_CAPABILITY_H
120 # include <sys/prctl.h>
121 # include <sys/capability.h>
122 #endif
123
124 #include "ninfod.h"
125
126 #ifndef offsetof
127 # define offsetof(aggregate,member) ((size_t)&((aggregate *)0)->member)
128 #endif
129
130 /* --------- */
131 /* ID */
132 static char *RCSID __attribute__ ((unused)) = "$USAGI: ninfod.c,v 1.34 2003-01-15 06:41:23 mk Exp $";
133
134 /* Variables */
135 int sock;
136 int daemonized;
137
138 char *appname;
139 static int opt_d = 0; /* debug */
140 static int opt_h = 0; /* help */
141 static char *opt_p = NINFOD_PIDFILE; /* pidfile */
142 static int got_signal = 0; /* loop unless true */
143 int opt_v = 0; /* verbose */
144 static uid_t opt_u;
145
146 static int ipv6_pktinfo = IPV6_PKTINFO;
147
148 /* --------- */
149 #if ENABLE_DEBUG
log_level(int priority)150 static const __inline__ char * log_level(int priority) {
151 switch(priority) {
152 case LOG_EMERG: return "EMERG";
153 case LOG_ALERT: return "ALERT";
154 case LOG_CRIT: return "CRIT";
155 case LOG_ERR: return "ERR";
156 case LOG_WARNING: return "WARNING";
157 case LOG_NOTICE: return "NOTICE";
158 case LOG_INFO: return "INFO";
159 case LOG_DEBUG: return "DEBUG";
160 default: return "???";
161 }
162 }
163
stderrlog(int pri,char * fmt,...)164 void stderrlog(int pri, char *fmt, ...)
165 {
166 va_list ap;
167 char ebuf[512];
168 char *buf;
169 size_t buflen;
170
171 va_start(ap, fmt);
172
173 for (buf = ebuf, buflen = sizeof(ebuf);
174 buflen < SIZE_MAX / 2;
175 free(buf != ebuf ? buf : NULL), buf = NULL, buflen *= 2) {
176 size_t rem;
177 size_t res;
178
179 buf = malloc(buflen);
180 if (!buf)
181 break; /*XXX*/
182
183 rem = buflen;
184
185 res = snprintf(buf, rem, "[%s] ", log_level(pri));
186 if (res >= rem)
187 continue;
188 rem -= res;
189
190 res = vsnprintf(buf + res, rem, fmt, ap);
191
192 if (res >= rem)
193 continue;
194 break;
195 }
196
197 if (buf) {
198 fputs(buf, stderr);
199 free(buf != ebuf ? buf : NULL);
200 }
201
202 va_end(ap);
203 }
204 #endif
205
206 /* --------- */
open_sock(void)207 static int __inline__ open_sock(void)
208 {
209 return socket(PF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
210 }
211
set_recvpktinfo(int sock)212 static int set_recvpktinfo(int sock)
213 {
214 int on, ret;
215
216 on = 1;
217
218 #if defined(IPV6_RECVPKTINFO)
219 ret = setsockopt(sock,
220 IPPROTO_IPV6, IPV6_RECVPKTINFO,
221 &on, sizeof(on));
222 if (!ret)
223 return 0;
224 # if defined(IPV6_2292PKTINFO)
225 ret = setsockopt(sock,
226 IPPROTO_IPV6, IPV6_2292PKTINFO,
227 &on, sizeof(on));
228 if (!ret) {
229 ipv6_pktinfo = IPV6_2292PKTINFO;
230 return 0;
231 }
232
233 DEBUG(LOG_ERR, "setsockopt(IPV6_RECVPKTINFO/IPV6_2292PKTINFO): %s\n",
234 strerror(errno));
235 # else
236 DEBUG(LOG_ERR, "setsockopt(IPV6_RECVPKTINFO): %s\n",
237 strerror(errno));
238 # endif
239 #else
240 ret = setsockopt(sock,
241 IPPROTO_IPV6, IPV6_PKTINFO,
242 &on, sizeof(on));
243 if (!ret)
244 return 0;
245
246 DEBUG(LOG_ERR, "setsockopt(IPV6_PKTINFO): %s\n",
247 strerror(errno));
248 #endif
249
250 return -1;
251 }
252
init_sock(int sock)253 static int __inline__ init_sock(int sock)
254 {
255 struct icmp6_filter filter;
256 #if NEED_IPV6CHECKSUM
257 int i;
258
259 i = offsetof(struct icmp6_nodeinfo, ni_cksum);
260 if (setsockopt(sock,
261 IPPROTO_IPV6, IPV6_CHECKSUM,
262 &i, sizeof(i)) < 0) {
263 DEBUG(LOG_ERR, "setsockopt(IPV6_CHECKSUM): %s\n",
264 strerror(errno));
265 return -1;
266 }
267 #endif
268
269 ICMP6_FILTER_SETBLOCKALL(&filter);
270 ICMP6_FILTER_SETPASS(ICMP6_NI_QUERY, &filter);
271 if (setsockopt(sock,
272 IPPROTO_ICMPV6, ICMP6_FILTER,
273 &filter, sizeof(filter)) < 0) {
274 DEBUG(LOG_ERR, "setsockopt(ICMP6_FILTER): %s\n",
275 strerror(errno));
276 return -1;
277 }
278
279 if (set_recvpktinfo(sock) < 0)
280 return -1;
281
282 return 0;
283 }
284
285 /* --------- */
ni_recv(struct packetcontext * p)286 int ni_recv(struct packetcontext *p)
287 {
288 int sock = p->sock;
289 struct iovec iov[1];
290 struct msghdr msgh;
291 char recvcbuf[CMSG_SPACE(sizeof(p->pktinfo))];
292 struct cmsghdr *cmsg;
293 int cc;
294
295 DEBUG(LOG_DEBUG, "%s()\n", __func__);
296
297 memset(&iov, 0, sizeof(iov));
298 iov[0].iov_base = p->query;
299 iov[0].iov_len = sizeof(p->query);
300
301 memset(&msgh, 0, sizeof(msgh));
302 msgh.msg_name = (struct sockaddr *)&p->addr;
303 msgh.msg_namelen = sizeof(p->addr);
304 msgh.msg_iov = iov;
305 msgh.msg_iovlen = 1;
306 msgh.msg_control = recvcbuf;
307 msgh.msg_controllen = sizeof(recvcbuf);
308
309 if ((cc = recvmsg(sock, &msgh, 0)) < 0)
310 return -1;
311
312 p->querylen = cc;
313 p->addrlen = msgh.msg_namelen;
314
315 for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg;
316 cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
317 if (cmsg->cmsg_level == IPPROTO_IPV6 &&
318 (cmsg->cmsg_type == IPV6_PKTINFO
319 #if defined(IPV6_2292PKTINFO)
320 || cmsg->cmsg_type == IPV6_2292PKTINFO
321 #endif
322 )) {
323 memcpy(&p->pktinfo, CMSG_DATA(cmsg), sizeof(p->pktinfo));
324 break;
325 }
326 }
327
328 return 0;
329 }
330
ni_send(struct packetcontext * p)331 int ni_send(struct packetcontext *p)
332 {
333 int sock = p->sock;
334 struct iovec iov[2];
335 char cbuf[CMSG_SPACE(sizeof(p->pktinfo))];
336 struct msghdr msgh;
337 struct cmsghdr *cmsg;
338 int cc;
339
340 DEBUG(LOG_DEBUG, "%s()\n", __func__);
341
342 memset(&iov, 0, sizeof(iov));
343 iov[0].iov_base = &p->reply;
344 iov[0].iov_len = sizeof(p->reply);
345 iov[1].iov_base = p->replydata;
346 iov[1].iov_len = p->replydatalen;
347
348 memset(&msgh, 0, sizeof(msgh));
349 msgh.msg_name = (struct sockaddr *)&p->addr;
350 msgh.msg_namelen = p->addrlen;
351 msgh.msg_iov = iov;
352 msgh.msg_iovlen = p->replydata ? 2 : 1;
353
354 msgh.msg_control = cbuf;
355 msgh.msg_controllen = sizeof(cbuf);
356
357 cmsg = CMSG_FIRSTHDR(&msgh);
358 cmsg->cmsg_level = IPPROTO_IPV6;
359 cmsg->cmsg_type = ipv6_pktinfo;
360 cmsg->cmsg_len = CMSG_LEN(sizeof(p->pktinfo));
361 memcpy(CMSG_DATA(cmsg), &p->pktinfo, sizeof(p->pktinfo));
362
363 msgh.msg_controllen = cmsg->cmsg_len;
364
365 if (p->delay) {
366 #if HAVE_NANOSLEEP
367 struct timespec ts, rts;
368 int err = 0;
369
370 rts.tv_sec = p->delay / 1000000;
371 rts.tv_nsec = (long)(p->delay % 1000000) * 1000;
372
373 do {
374 ts = rts;
375 err = nanosleep(&ts, &rts);
376 } while(err < 0);
377 #else
378 usleep(p->delay); /*XXX: signal*/
379 #endif
380 }
381
382 cc = sendmsg(sock, &msgh, 0);
383 if (cc < 0)
384 DEBUG(LOG_DEBUG, "sendmsg(): %s\n", strerror(errno));
385
386 ni_free(p->replydata);
387 ni_free(p);
388
389 return cc;
390 }
391
392 /* --------- */
sig_handler(int sig)393 static void sig_handler(int sig)
394 {
395 if (!got_signal)
396 DEBUG(LOG_INFO, "singnal(%d) received, quitting.\n", sig);
397 got_signal = 1;
398 }
399
setup_sighandlers(void)400 static void setup_sighandlers(void)
401 {
402 struct sigaction act;
403 sigset_t smask;
404 sigemptyset(&smask);
405 sigaddset(&smask, SIGHUP);
406 sigaddset(&smask, SIGINT);
407 sigaddset(&smask, SIGQUIT);
408 sigaddset(&smask, SIGTERM);
409
410 memset(&act, 0, sizeof(act));
411 act.sa_handler = sig_handler;
412 act.sa_mask = smask;
413
414 sigaction(SIGHUP, &act, NULL);
415 sigaction(SIGINT, &act, NULL);
416 sigaction(SIGQUIT, &act, NULL);
417 sigaction(SIGTERM, &act, NULL);
418 }
419
set_logfile(void)420 static void set_logfile(void)
421 {
422 setbuf(stderr, NULL);
423 #if ENABLE_DEBUG
424 openlog(NINFOD, 0, LOG_USER);
425 #endif
426 }
427
cleanup_pidfile(void)428 static void cleanup_pidfile(void)
429 {
430 int err;
431
432 if (daemonized && opt_p) {
433 err = unlink(opt_p);
434 DEBUG(LOG_ERR, "failed to unlink file '%s' : %s\n",
435 opt_p, strerror(errno));
436 }
437 }
438
fopen_excl(const char * file)439 static FILE *fopen_excl(const char *file)
440 {
441 #ifndef __linux__
442 int fd;
443 FILE *fp;
444
445 fd = open(file, O_CREAT | O_RDWR | O_EXCL,
446 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
447 if (fd < 0)
448 return NULL;
449
450 return fdopen(file, "w+");
451 #else
452 return fopen(file, "w+x");
453 #endif
454 }
455
do_daemonize(void)456 static void do_daemonize(void)
457 {
458 FILE *fp = NULL;
459 pid_t pid;
460
461 if (opt_p) {
462 if (!access(opt_p, R_OK)) {
463 if ((fp = fopen(opt_p, "r"))) {
464 if (fscanf(fp, "%d", &pid) != 1) {
465 DEBUG(LOG_ERR, "pid file '%s' exists, but read failed.\n",
466 opt_p);
467 } else {
468 DEBUG(LOG_ERR, "pid file '%s' exists : %d\n",
469 opt_p, pid);
470 }
471 fclose(fp);
472 exit(1);
473 }
474 }
475
476 fp = fopen_excl(opt_p);
477 if (!fp) {
478 DEBUG(LOG_ERR, "failed to open file '%s': %s\n",
479 opt_p, strerror(errno));
480 exit(1);
481 }
482 }
483
484 if (daemon(0, 0) < 0) {
485 DEBUG(LOG_ERR, "failed to daemon(): %s\n", strerror(errno));
486 unlink(opt_p);
487 exit(1);
488 }
489 daemonized = 1;
490
491 if (fp) {
492 fprintf(fp, "%d\n", getpid());
493 fclose(fp);
494 }
495 }
496
497 /* --------- */
498 #ifdef HAVE_LIBCAP
499 static const cap_value_t cap_net_raw = CAP_NET_RAW;
500 static const cap_value_t cap_setuid = CAP_SETUID;
501 static cap_flag_value_t cap_ok;
502 #else
503 static uid_t euid;
504 #endif
505
limit_capabilities(void)506 static void limit_capabilities(void)
507 {
508 #ifdef HAVE_LIBCAP
509 cap_t cap_p, cap_cur_p;
510
511 cap_p = cap_init();
512 if (!cap_p) {
513 DEBUG(LOG_ERR, "cap_init: %s\n", strerror(errno));
514 exit(-1);
515 }
516
517 cap_cur_p = cap_get_proc();
518 if (!cap_cur_p) {
519 DEBUG(LOG_ERR, "cap_get_proc: %s\n", strerror(errno));
520 exit(-1);
521 }
522
523 /* net_raw + setuid / net_raw */
524 cap_get_flag(cap_cur_p, CAP_NET_RAW, CAP_PERMITTED, &cap_ok);
525 if (cap_ok != CAP_CLEAR) {
526 cap_set_flag(cap_p, CAP_PERMITTED, 1, &cap_net_raw, CAP_SET);
527 cap_set_flag(cap_p, CAP_EFFECTIVE, 1, &cap_net_raw, CAP_SET);
528 }
529
530 cap_get_flag(cap_cur_p, CAP_SETUID, CAP_PERMITTED, &cap_ok);
531 if (cap_ok != CAP_CLEAR)
532 cap_set_flag(cap_p, CAP_PERMITTED, 1, &cap_setuid, CAP_SET);
533
534 if (cap_set_proc(cap_p) < 0) {
535 DEBUG(LOG_ERR, "cap_set_proc: %s\n", strerror(errno));
536 if (errno != EPERM)
537 exit(-1);
538 }
539
540 if (prctl(PR_SET_KEEPCAPS, 1) < 0) {
541 DEBUG(LOG_ERR, "prctl: %s\n", strerror(errno));
542 exit(-1);
543 }
544
545 cap_free(cap_cur_p);
546 cap_free(cap_p);
547 #else
548 euid = geteuid();
549 #endif
550 }
551
drop_capabilities(void)552 static void drop_capabilities(void)
553 {
554 #ifdef HAVE_LIBCAP
555 cap_t cap_p;
556
557 cap_p = cap_init();
558 if (!cap_p) {
559 DEBUG(LOG_ERR, "cap_init: %s\n", strerror(errno));
560 exit(-1);
561 }
562
563 /* setuid / setuid */
564 if (cap_ok != CAP_CLEAR) {
565 cap_set_flag(cap_p, CAP_PERMITTED, 1, &cap_setuid, CAP_SET);
566 cap_set_flag(cap_p, CAP_EFFECTIVE, 1, &cap_setuid, CAP_SET);
567
568 if (cap_set_proc(cap_p) < 0) {
569 DEBUG(LOG_ERR, "cap_set_proc: %s\n", strerror(errno));
570 exit(-1);
571 }
572 }
573
574 if (seteuid(opt_u ? opt_u : getuid()) < 0) {
575 DEBUG(LOG_ERR, "setuid: %s\n", strerror(errno));
576 exit(-1);
577 }
578
579 if (prctl(PR_SET_KEEPCAPS, 0) < 0) {
580 DEBUG(LOG_ERR, "prctl: %s\n", strerror(errno));
581 exit(-1);
582 }
583
584 cap_clear(cap_p);
585 if (cap_set_proc(cap_p) < 0) {
586 DEBUG(LOG_ERR, "cap_set_proc: %s\n", strerror(errno));
587 exit(-1);
588 }
589
590 cap_free(cap_p);
591 #else
592 if (setuid(getuid()) < 0) {
593 DEBUG(LOG_ERR, "setuid: %s\n", strerror(errno));
594 exit(-1);
595 }
596 #endif
597 }
598
599 /* --------- */
parse_args(int argc,char ** argv)600 static void parse_args(int argc, char **argv)
601 {
602 int c;
603 unsigned long val;
604 char *ep;
605
606 /* parse options */
607 while ((c = getopt(argc, argv, "dhvp:u:")) != -1) {
608 switch(c) {
609 case 'd': /* debug */
610 opt_d = 1;
611 break;
612 case 'v': /* verbose */
613 opt_v = 1;
614 break;
615 case 'p':
616 opt_p = optarg;
617 break;
618 case 'u':
619 val = strtoul(optarg, &ep, 10);
620 if (!optarg || *ep) {
621 struct passwd *pw = getpwnam(optarg);
622 if (!pw) {
623 DEBUG(LOG_ERR, "No such user: %s", optarg);
624 exit(1);
625 }
626 opt_u = pw->pw_uid;
627 } else
628 opt_u = val;
629 break;
630 case 'h': /* help */
631 default:
632 opt_h = 1;
633 break;
634 }
635 }
636
637 argc -= optind;
638 #if 0
639 argv += optind;
640 #endif
641
642 if (argc)
643 opt_h = 1;
644 }
645
print_copying(void)646 static void print_copying(void) {
647 fprintf(stderr,
648 "Node Information Daemon\n"
649 "Copyright (C)2002 USAGI/WIDE Project. All Rights Reserved.\n"
650 "\n"
651 );
652 }
653
print_usage(void)654 static void print_usage(void) {
655 fprintf(stderr,
656 "Usage: %s [-d] [-p pidfile] [-u user] [-h] [-v]\n\n",
657 appname
658 );
659 }
660
661 /* --------- */
main(int argc,char ** argv)662 int main (int argc, char **argv)
663 {
664 int sock_errno = 0;
665 int ret;
666
667 appname = argv[0];
668 set_logfile();
669
670 limit_capabilities();
671
672 sock = open_sock();
673 if (sock < 0)
674 sock_errno = errno;
675
676 parse_args(argc, argv);
677
678 drop_capabilities();
679
680 if (opt_h || opt_v)
681 print_copying();
682 if (opt_h) {
683 print_usage();
684 exit(1);
685 }
686
687 if (sock_errno) {
688 DEBUG(LOG_ERR, "socket: %s\n", strerror(sock_errno));
689 exit(1);
690 }
691
692 /* initialize */
693 if (init_sock(sock) < 0)
694 exit(1);
695
696 setup_sighandlers();
697 if (!opt_d)
698 do_daemonize();
699
700 init_core(1);
701
702 /* main loop */
703 while (!got_signal) {
704 struct packetcontext *p;
705 struct icmp6_hdr *icmph;
706 #if ENABLE_DEBUG
707 char saddrbuf[NI_MAXHOST];
708 int gni;
709 #endif
710
711 init_core(0);
712
713 p = ni_malloc(sizeof(*p));
714 if (!p) {
715 DEBUG(LOG_WARNING, "%s(): failed to allocate packet context; sleep 1 sec.\n",
716 __func__);
717 sleep(1);
718 continue;
719 }
720
721 while (!got_signal) {
722 memset(p, 0, sizeof(*p));
723 p->sock = sock;
724
725 if (ni_recv(p) < 0) {
726 if (got_signal)
727 break;
728 if (errno == EAGAIN || errno == EINTR)
729 continue;
730 /* XXX: syslog */
731 continue;
732 }
733 break;
734 }
735
736 #if ENABLE_DEBUG
737 gni = getnameinfo((struct sockaddr *)&p->addr,
738 p->addrlen,
739 saddrbuf, sizeof(saddrbuf),
740 NULL, 0,
741 NI_NUMERICHOST);
742 if (gni)
743 sprintf(saddrbuf, "???");
744 #endif
745 init_core(0);
746
747 if (p->querylen < sizeof(struct icmp6_hdr)) {
748 ni_free(p);
749 DEBUG(LOG_WARNING, "Too short icmp message from %s\n", saddrbuf);
750 continue;
751 }
752
753 icmph = (struct icmp6_hdr *)p->query;
754
755 DEBUG(LOG_DEBUG,
756 "type=%d, code=%d, cksum=0x%04x\n",
757 icmph->icmp6_type, icmph->icmp6_code,
758 ntohs(icmph->icmp6_cksum));
759
760 if (icmph->icmp6_type != ICMP6_NI_QUERY) {
761 DEBUG(LOG_WARNING,
762 "Strange icmp type %d from %s\n",
763 icmph->icmp6_type, saddrbuf);
764 ni_free(p);
765 continue;
766 }
767
768 pr_nodeinfo(p); /* this frees p */
769 }
770
771 cleanup_pidfile();
772
773 exit(0);
774 }
775
776