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inpcb: Use netisr_ncpus for listing inpcbs.
[dragonfly.git] / sbin / ping6 / ping6.c
blob5d961f1d1918d993eb0efb9a8af281d4ea11b930
1 /* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
32 * @(#)ping.c 8.1 (Berkeley) 6/5/93
33 * $FreeBSD: src/sbin/ping6/ping6.c,v 1.30 2007/04/19 15:41:00 mtm Exp $
34 */
35
36 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */
37
38 /*
39 * Copyright (c) 1989, 1993
40 * The Regents of the University of California. All rights reserved.
41 *
42 * This code is derived from software contributed to Berkeley by
43 * Mike Muuss.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. Neither the name of the University nor the names of its contributors
54 * may be used to endorse or promote products derived from this software
55 * without specific prior written permission.
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 */
69
70 /*
71 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
72 * measure round-trip-delays and packet loss across network paths.
73 *
74 * Author -
75 * Mike Muuss
76 * U. S. Army Ballistic Research Laboratory
77 * December, 1983
78 *
79 * Status -
80 * Public Domain. Distribution Unlimited.
81 * Bugs -
82 * More statistics could always be gathered.
83 * This program has to run SUID to ROOT to access the ICMP socket.
84 */
85 /*
86 * NOTE:
87 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
88 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link*
89 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of
90 * network attached to 1 or more interfaces)
91 */
92
93 #include <sys/param.h>
94 #include <sys/uio.h>
95 #include <sys/socket.h>
96 #include <sys/time.h>
97
98 #include <net/if.h>
99 #include <net/route.h>
100
101 #include <netinet/in.h>
102 #include <netinet/ip6.h>
103 #include <netinet/icmp6.h>
104 #include <arpa/inet.h>
105 #include <arpa/nameser.h>
106 #include <netdb.h>
107
108 #include <ctype.h>
109 #include <err.h>
110 #include <errno.h>
111 #include <fcntl.h>
112 #include <math.h>
113 #include <signal.h>
114 #include <stdio.h>
115 #include <stdlib.h>
116 #include <string.h>
117 #include <unistd.h>
118 #ifdef HAVE_POLL_H
119 #include <poll.h>
120 #endif
121
122 #ifdef IPSEC
123 #include <netinet6/ah.h>
124 #include <netinet6/ipsec.h>
125 #endif
126
127 #include <md5.h>
128
129 struct tv32 {
130 u_int32_t tv32_sec;
131 u_int32_t tv32_usec;
132 };
133
134 #define MAXPACKETLEN 131072
135 #define IP6LEN 40
136 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */
137 #define ICMP6ECHOTMLEN sizeof(struct tv32)
138 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8)
139 #define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */
140 /* FQDN case, 64 bits of nonce + 32 bits ttl */
141 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12)
142 #define EXTRA 256 /* for AH and various other headers. weird. */
143 #define DEFDATALEN ICMP6ECHOTMLEN
144 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
145 #define NROUTES 9 /* number of record route slots */
146
147 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
148 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
149 #define SET(bit) (A(bit) |= B(bit))
150 #define CLR(bit) (A(bit) &= (~B(bit)))
151 #define TST(bit) (A(bit) & B(bit))
152
153 #define F_FLOOD 0x0001
154 #define F_INTERVAL 0x0002
155 #define F_PINGFILLED 0x0008
156 #define F_QUIET 0x0010
157 #define F_RROUTE 0x0020
158 #define F_SO_DEBUG 0x0040
159 #define F_VERBOSE 0x0100
160 #ifdef IPSEC
161 #ifdef IPSEC_POLICY_IPSEC
162 #define F_POLICY 0x0400
163 #else
164 #define F_AUTHHDR 0x0200
165 #define F_ENCRYPT 0x0400
166 #endif /*IPSEC_POLICY_IPSEC*/
167 #endif /*IPSEC*/
168 #define F_NODEADDR 0x0800
169 #define F_FQDN 0x1000
170 #define F_INTERFACE 0x2000
171 #define F_SRCADDR 0x4000
172 #define F_HOSTNAME 0x10000
173 #define F_FQDNOLD 0x20000
174 #define F_NIGROUP 0x40000
175 #define F_SUPTYPES 0x80000
176 #define F_NOMINMTU 0x100000
177 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
178 u_int options;
179
180 #define IN6LEN sizeof(struct in6_addr)
181 #define SA6LEN sizeof(struct sockaddr_in6)
182 #define DUMMY_PORT 10101
183
184 #define SIN6(s) ((struct sockaddr_in6 *)(s))
185
186 /*
187 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
188 * number of received sequence numbers we can keep track of. Change 128
189 * to 8192 for complete accuracy...
190 */
191 #define MAX_DUP_CHK (8 * 8192)
192 int mx_dup_ck = MAX_DUP_CHK;
193 char rcvd_tbl[MAX_DUP_CHK / 8];
194
195 struct addrinfo *res;
196 struct sockaddr_in6 dst; /* who to ping6 */
197 struct sockaddr_in6 src; /* src addr of this packet */
198 socklen_t srclen;
199 int datalen = DEFDATALEN;
200 int s; /* socket file descriptor */
201 u_char outpack[MAXPACKETLEN];
202 char BSPACE = '\b'; /* characters written for flood */
203 char DOT = '.';
204 char *hostname;
205 int ident; /* process id to identify our packets */
206 u_int8_t nonce[8]; /* nonce field for node information */
207 int hoplimit = -1; /* hoplimit */
208 int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */
209
210 /* counters */
211 long npackets; /* max packets to transmit */
212 long nreceived; /* # of packets we got back */
213 long nrepeats; /* number of duplicates */
214 long ntransmitted; /* sequence # for outbound packets = #sent */
215 struct timeval interval = {1, 0}; /* interval between packets */
216
217 /* timing */
218 int timing; /* flag to do timing */
219 double tmin = 999999999.0; /* minimum round trip time */
220 double tmax = 0.0; /* maximum round trip time */
221 double tsum = 0.0; /* sum of all times, for doing average */
222 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
223
224 /* for node addresses */
225 u_short naflags;
226
227 /* for ancillary data(advanced API) */
228 struct msghdr smsghdr;
229 struct iovec smsgiov;
230 char *scmsg = NULL;
231
232 volatile sig_atomic_t seenalrm;
233 volatile sig_atomic_t seenint;
234 #ifdef SIGINFO
235 volatile sig_atomic_t seeninfo;
236 #endif
237
238 void fill(char *, char *);
239 int get_hoplim(struct msghdr *);
240 #ifdef IPV6_RECVPATHMTU
241 int get_pathmtu(struct msghdr *);
242 #else
243 #define get_pathmtu(mhdr) (0)
244 #endif
245 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
246 void onsignal(int);
247 void retransmit(void);
248 void onint(int);
249 size_t pingerlen(void);
250 int pinger(void);
251 const char *pr_addr(struct sockaddr *, int);
252 void pr_icmph(struct icmp6_hdr *, u_char *);
253 void pr_iph(struct ip6_hdr *);
254 void pr_suptypes(struct icmp6_nodeinfo *, size_t);
255 void pr_nodeaddr(struct icmp6_nodeinfo *, int);
256 int myechoreply(const struct icmp6_hdr *);
257 int mynireply(const struct icmp6_nodeinfo *);
258 char *dnsdecode(const u_char **, const u_char *, const u_char *,
259 char *, size_t);
260 void pr_pack(u_char *, int, struct msghdr *);
261 void pr_exthdrs(struct msghdr *);
262 void pr_ip6opt(void *, size_t);
263 void pr_rthdr(void *, size_t);
264 int pr_bitrange(u_int32_t, int, int);
265 void pr_retip(struct ip6_hdr *, u_char *);
266 void summary(void);
267 void tvsub(struct timeval *, struct timeval *);
268 int setpolicy(int, char *);
269 char *nigroup(char *);
270 void usage(void);
271
272 int
273 main(int argc, char **argv)
274 {
275 struct itimerval itimer;
276 struct sockaddr_in6 from;
277 #ifndef HAVE_ARC4RANDOM
278 struct timeval seed;
279 #endif
280 #ifdef HAVE_POLL_H
281 int timeout;
282 #else
283 struct timeval timeout, *tv;
284 #endif
285 struct addrinfo hints;
286 #ifdef HAVE_POLL_H
287 struct pollfd fdmaskp[1];
288 #else
289 fd_set *fdmaskp;
290 int fdmasks;
291 #endif
292 int cc, i;
293 int ch, hold, packlen, preload, optval, ret_ga;
294 u_char *datap, *packet;
295 char *e, *target, *ifname = NULL, *gateway = NULL;
296 int ip6optlen = 0;
297 struct cmsghdr *scmsgp = NULL;
298 struct cmsghdr *cm;
299 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
300 u_long lsockbufsize;
301 int sockbufsize = 0;
302 #endif
303 int usepktinfo = 0;
304 struct in6_pktinfo *pktinfo = NULL;
305 #ifdef USE_RFC3542
306 struct ip6_rthdr *rthdr = NULL;
307 #endif
308 #ifdef IPSEC_POLICY_IPSEC
309 char *policy_in = NULL;
310 char *policy_out = NULL;
311 #endif
312 #ifdef IPV6_USE_MIN_MTU
313 int mflag = 0;
314 #endif
315 double intval;
316
317 /* just to be sure */
318 memset(&smsghdr, 0, sizeof(smsghdr));
319 memset(&smsgiov, 0, sizeof(smsgiov));
320
321 preload = 0;
322 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
323 #ifndef IPSEC
324 #define ADDOPTS
325 #else
326 #ifdef IPSEC_POLICY_IPSEC
327 #define ADDOPTS "P:"
328 #else
329 #define ADDOPTS "AE"
330 #endif /*IPSEC_POLICY_IPSEC*/
331 #endif
332 while ((ch = getopt(argc, argv,
333 "a:b:c:dfHg:h:I:i:l:mnNp:qS:s:tvwW" ADDOPTS)) != -1) {
334 #undef ADDOPTS
335 switch (ch) {
336 case 'a':
337 {
338 char *cp;
339
340 options &= ~F_NOUSERDATA;
341 options |= F_NODEADDR;
342 for (cp = optarg; *cp != '\0'; cp++) {
343 switch (*cp) {
344 case 'a':
345 naflags |= NI_NODEADDR_FLAG_ALL;
346 break;
347 case 'c':
348 case 'C':
349 naflags |= NI_NODEADDR_FLAG_COMPAT;
350 break;
351 case 'l':
352 case 'L':
353 naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
354 break;
355 case 's':
356 case 'S':
357 naflags |= NI_NODEADDR_FLAG_SITELOCAL;
358 break;
359 case 'g':
360 case 'G':
361 naflags |= NI_NODEADDR_FLAG_GLOBAL;
362 break;
363 case 'A': /* experimental. not in the spec */
364 #ifdef NI_NODEADDR_FLAG_ANYCAST
365 naflags |= NI_NODEADDR_FLAG_ANYCAST;
366 break;
367 #else
368 errx(1,
369 "-a A is not supported on the platform");
370 /*NOTREACHED*/
371 #endif
372 default:
373 usage();
374 /*NOTREACHED*/
375 }
376 }
377 break;
378 }
379 case 'b':
380 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
381 errno = 0;
382 e = NULL;
383 lsockbufsize = strtoul(optarg, &e, 10);
384 sockbufsize = lsockbufsize;
385 if (errno || !*optarg || *e ||
386 sockbufsize != (long)lsockbufsize)
387 errx(1, "invalid socket buffer size");
388 #else
389 errx(1,
390 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
391 #endif
392 break;
393 case 'c':
394 npackets = strtol(optarg, &e, 10);
395 if (npackets <= 0 || *optarg == '\0' || *e != '\0')
396 errx(1,
397 "illegal number of packets -- %s", optarg);
398 break;
399 case 'd':
400 options |= F_SO_DEBUG;
401 break;
402 case 'f':
403 if (getuid()) {
404 errno = EPERM;
405 errx(1, "Must be superuser to flood ping");
406 }
407 options |= F_FLOOD;
408 setbuf(stdout, NULL);
409 break;
410 case 'g':
411 gateway = optarg;
412 break;
413 case 'H':
414 options |= F_HOSTNAME;
415 break;
416 case 'h': /* hoplimit */
417 hoplimit = strtol(optarg, &e, 10);
418 if (*optarg == '\0' || *e != '\0')
419 errx(1, "illegal hoplimit %s", optarg);
420 if (255 < hoplimit || hoplimit < -1)
421 errx(1,
422 "illegal hoplimit -- %s", optarg);
423 break;
424 case 'I':
425 ifname = optarg;
426 options |= F_INTERFACE;
427 #ifndef USE_SIN6_SCOPE_ID
428 usepktinfo++;
429 #endif
430 break;
431 case 'i': /* wait between sending packets */
432 intval = strtod(optarg, &e);
433 if (*optarg == '\0' || *e != '\0')
434 errx(1, "illegal timing interval %s", optarg);
435 if (intval < 1 && getuid()) {
436 errx(1, "%s: only root may use interval < 1s",
437 strerror(EPERM));
438 }
439 interval.tv_sec = (long)intval;
440 interval.tv_usec =
441 (long)((intval - interval.tv_sec) * 1000000);
442 if (interval.tv_sec < 0)
443 errx(1, "illegal timing interval %s", optarg);
444 /* less than 1/hz does not make sense */
445 if (interval.tv_sec == 0 && interval.tv_usec < 10000) {
446 warnx("too small interval, raised to 0.01");
447 interval.tv_usec = 10000;
448 }
449 options |= F_INTERVAL;
450 break;
451 case 'l':
452 if (getuid()) {
453 errno = EPERM;
454 errx(1, "Must be superuser to preload");
455 }
456 preload = strtol(optarg, &e, 10);
457 if (preload < 0 || *optarg == '\0' || *e != '\0')
458 errx(1, "illegal preload value -- %s", optarg);
459 break;
460 case 'm':
461 #ifdef IPV6_USE_MIN_MTU
462 mflag++;
463 break;
464 #else
465 errx(1, "-%c is not supported on this platform", ch);
466 /*NOTREACHED*/
467 #endif
468 case 'n':
469 options &= ~F_HOSTNAME;
470 break;
471 case 'N':
472 options |= F_NIGROUP;
473 break;
474 case 'p': /* fill buffer with user pattern */
475 options |= F_PINGFILLED;
476 fill((char *)datap, optarg);
477 break;
478 case 'q':
479 options |= F_QUIET;
480 break;
481 case 'S':
482 memset(&hints, 0, sizeof(struct addrinfo));
483 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
484 hints.ai_family = AF_INET6;
485 hints.ai_socktype = SOCK_RAW;
486 hints.ai_protocol = IPPROTO_ICMPV6;
487
488 ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
489 if (ret_ga) {
490 errx(1, "invalid source address: %s",
491 gai_strerror(ret_ga));
492 }
493 /*
494 * res->ai_family must be AF_INET6 and res->ai_addrlen
495 * must be sizeof(src).
496 */
497 memcpy(&src, res->ai_addr, res->ai_addrlen);
498 srclen = res->ai_addrlen;
499 freeaddrinfo(res);
500 options |= F_SRCADDR;
501 break;
502 case 's': /* size of packet to send */
503 datalen = strtol(optarg, &e, 10);
504 if (datalen <= 0 || *optarg == '\0' || *e != '\0')
505 errx(1, "illegal datalen value -- %s", optarg);
506 if (datalen > MAXDATALEN) {
507 errx(1,
508 "datalen value too large, maximum is %d",
509 MAXDATALEN);
510 }
511 break;
512 case 't':
513 options &= ~F_NOUSERDATA;
514 options |= F_SUPTYPES;
515 break;
516 case 'v':
517 options |= F_VERBOSE;
518 break;
519 case 'w':
520 options &= ~F_NOUSERDATA;
521 options |= F_FQDN;
522 break;
523 case 'W':
524 options &= ~F_NOUSERDATA;
525 options |= F_FQDNOLD;
526 break;
527 #ifdef IPSEC
528 #ifdef IPSEC_POLICY_IPSEC
529 case 'P':
530 options |= F_POLICY;
531 if (!strncmp("in", optarg, 2)) {
532 if ((policy_in = strdup(optarg)) == NULL)
533 errx(1, "strdup");
534 } else if (!strncmp("out", optarg, 3)) {
535 if ((policy_out = strdup(optarg)) == NULL)
536 errx(1, "strdup");
537 } else
538 errx(1, "invalid security policy");
539 break;
540 #else
541 case 'A':
542 options |= F_AUTHHDR;
543 break;
544 case 'E':
545 options |= F_ENCRYPT;
546 break;
547 #endif /*IPSEC_POLICY_IPSEC*/
548 #endif /*IPSEC*/
549 default:
550 usage();
551 /*NOTREACHED*/
552 }
553 }
554
555 argc -= optind;
556 argv += optind;
557
558 if (argc < 1) {
559 usage();
560 /*NOTREACHED*/
561 }
562 if (argc > 1) {
563 errx(1, "too many arguments");
564 /*NOTREACHED*/
565 }
566
567 if (options & F_NIGROUP) {
568 target = nigroup(argv[argc - 1]);
569 if (target == NULL) {
570 usage();
571 /*NOTREACHED*/
572 }
573 } else
574 target = argv[argc - 1];
575
576 /* getaddrinfo */
577 memset(&hints, 0, sizeof(struct addrinfo));
578 hints.ai_flags = AI_CANONNAME;
579 hints.ai_family = AF_INET6;
580 hints.ai_socktype = SOCK_RAW;
581 hints.ai_protocol = IPPROTO_ICMPV6;
582
583 ret_ga = getaddrinfo(target, NULL, &hints, &res);
584 if (ret_ga)
585 errx(1, "%s", gai_strerror(ret_ga));
586 if (res->ai_canonname)
587 hostname = res->ai_canonname;
588 else
589 hostname = target;
590
591 if (!res->ai_addr)
592 errx(1, "getaddrinfo failed");
593
594 memcpy(&dst, res->ai_addr, res->ai_addrlen);
595
596 if ((s = socket(res->ai_family, res->ai_socktype,
597 res->ai_protocol)) < 0)
598 err(1, "socket");
599
600 /* set the source address if specified. */
601 if ((options & F_SRCADDR) &&
602 bind(s, (struct sockaddr *)&src, srclen) != 0) {
603 err(1, "bind");
604 }
605
606 /* set the gateway (next hop) if specified */
607 if (gateway) {
608 struct addrinfo ghints, *gres;
609 int error;
610
611 memset(&ghints, 0, sizeof(ghints));
612 ghints.ai_family = AF_INET6;
613 ghints.ai_socktype = SOCK_RAW;
614 ghints.ai_protocol = IPPROTO_ICMPV6;
615
616 error = getaddrinfo(gateway, NULL, &hints, &gres);
617 if (error) {
618 errx(1, "getaddrinfo for the gateway %s: %s",
619 gateway, gai_strerror(error));
620 }
621 if (gres->ai_next && (options & F_VERBOSE))
622 warnx("gateway resolves to multiple addresses");
623
624 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
625 gres->ai_addr, gres->ai_addrlen)) {
626 err(1, "setsockopt(IPV6_NEXTHOP)");
627 }
628
629 freeaddrinfo(gres);
630 }
631
632 /*
633 * let the kerel pass extension headers of incoming packets,
634 * for privileged socket options
635 */
636 if ((options & F_VERBOSE) != 0) {
637 int opton = 1;
638
639 #ifdef IPV6_RECVHOPOPTS
640 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
641 sizeof(opton)))
642 err(1, "setsockopt(IPV6_RECVHOPOPTS)");
643 #else /* old adv. API */
644 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
645 sizeof(opton)))
646 err(1, "setsockopt(IPV6_HOPOPTS)");
647 #endif
648 #ifdef IPV6_RECVDSTOPTS
649 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
650 sizeof(opton)))
651 err(1, "setsockopt(IPV6_RECVDSTOPTS)");
652 #else /* old adv. API */
653 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
654 sizeof(opton)))
655 err(1, "setsockopt(IPV6_DSTOPTS)");
656 #endif
657 #ifdef IPV6_RECVRTHDRDSTOPTS
658 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
659 sizeof(opton)))
660 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
661 #endif
662 }
663
664 /* revoke root privilege */
665 seteuid(getuid());
666 setuid(getuid());
667
668 if ((options & F_FLOOD) && (options & F_INTERVAL))
669 errx(1, "-f and -i incompatible options");
670
671 if ((options & F_NOUSERDATA) == 0) {
672 if (datalen >= (int)sizeof(struct tv32)) {
673 /* we can time transfer */
674 timing = 1;
675 } else
676 timing = 0;
677 /* in F_VERBOSE case, we may get non-echoreply packets*/
678 if (options & F_VERBOSE)
679 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
680 else
681 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
682 } else {
683 /* suppress timing for node information query */
684 timing = 0;
685 datalen = 2048;
686 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
687 }
688
689 if (!(packet = (u_char *)malloc((u_int)packlen)))
690 err(1, "Unable to allocate packet");
691 if (!(options & F_PINGFILLED))
692 for (i = ICMP6ECHOLEN; i < packlen; ++i)
693 *datap++ = i;
694
695 ident = getpid() & 0xFFFF;
696 #ifndef HAVE_ARC4RANDOM
697 gettimeofday(&seed, NULL);
698 srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
699 memset(nonce, 0, sizeof(nonce));
700 for (i = 0; i < (int)sizeof(nonce); i += sizeof(int))
701 *((int *)&nonce[i]) = rand();
702 #else
703 memset(nonce, 0, sizeof(nonce));
704 for (i = 0; i < (int)sizeof(nonce); i += sizeof(u_int32_t))
705 *((u_int32_t *)&nonce[i]) = arc4random();
706 #endif
707
708 hold = 1;
709
710 if (options & F_SO_DEBUG)
711 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
712 sizeof(hold));
713 optval = IPV6_DEFHLIM;
714 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
715 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
716 &optval, sizeof(optval)) == -1)
717 err(1, "IPV6_MULTICAST_HOPS");
718 #ifdef IPV6_USE_MIN_MTU
719 if (mflag != 1) {
720 optval = mflag > 1 ? 0 : 1;
721 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
722 &optval, sizeof(optval)) == -1)
723 err(1, "setsockopt(IPV6_USE_MIN_MTU)");
724 }
725 #ifdef IPV6_RECVPATHMTU
726 else {
727 optval = 1;
728 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
729 &optval, sizeof(optval)) == -1)
730 err(1, "setsockopt(IPV6_RECVPATHMTU)");
731 }
732 #endif /* IPV6_RECVPATHMTU */
733 #endif /* IPV6_USE_MIN_MTU */
734
735 #ifdef IPSEC
736 #ifdef IPSEC_POLICY_IPSEC
737 if (options & F_POLICY) {
738 if (setpolicy(s, policy_in) < 0)
739 errx(1, "%s", ipsec_strerror());
740 if (setpolicy(s, policy_out) < 0)
741 errx(1, "%s", ipsec_strerror());
742 }
743 #else
744 if (options & F_AUTHHDR) {
745 optval = IPSEC_LEVEL_REQUIRE;
746 #ifdef IPV6_AUTH_TRANS_LEVEL
747 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
748 &optval, sizeof(optval)) == -1)
749 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
750 #else /* old def */
751 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
752 &optval, sizeof(optval)) == -1)
753 err(1, "setsockopt(IPV6_AUTH_LEVEL)");
754 #endif
755 }
756 if (options & F_ENCRYPT) {
757 optval = IPSEC_LEVEL_REQUIRE;
758 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
759 &optval, sizeof(optval)) == -1)
760 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
761 }
762 #endif /*IPSEC_POLICY_IPSEC*/
763 #endif
764
765 #ifdef ICMP6_FILTER
766 {
767 struct icmp6_filter filt;
768 if (!(options & F_VERBOSE)) {
769 ICMP6_FILTER_SETBLOCKALL(&filt);
770 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
771 (options & F_NODEADDR) || (options & F_SUPTYPES))
772 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
773 else
774 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
775 } else {
776 ICMP6_FILTER_SETPASSALL(&filt);
777 }
778 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
779 sizeof(filt)) < 0)
780 err(1, "setsockopt(ICMP6_FILTER)");
781 }
782 #endif /*ICMP6_FILTER*/
783
784 /* let the kerel pass extension headers of incoming packets */
785 if ((options & F_VERBOSE) != 0) {
786 int opton = 1;
787
788 #ifdef IPV6_RECVRTHDR
789 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
790 sizeof(opton)))
791 err(1, "setsockopt(IPV6_RECVRTHDR)");
792 #else /* old adv. API */
793 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
794 sizeof(opton)))
795 err(1, "setsockopt(IPV6_RTHDR)");
796 #endif
797 }
798
799 /*
800 optval = 1;
801 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
802 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
803 &optval, sizeof(optval)) == -1)
804 err(1, "IPV6_MULTICAST_LOOP");
805 */
806
807 /* Specify the outgoing interface and/or the source address */
808 if (usepktinfo)
809 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
810
811 if (hoplimit != -1)
812 ip6optlen += CMSG_SPACE(sizeof(int));
813
814 /* set IP6 packet options */
815 if (ip6optlen) {
816 if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
817 errx(1, "can't allocate enough memory");
818 smsghdr.msg_control = (caddr_t)scmsg;
819 smsghdr.msg_controllen = ip6optlen;
820 scmsgp = (struct cmsghdr *)scmsg;
821 }
822 if (usepktinfo) {
823 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
824 memset(pktinfo, 0, sizeof(*pktinfo));
825 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
826 scmsgp->cmsg_level = IPPROTO_IPV6;
827 scmsgp->cmsg_type = IPV6_PKTINFO;
828 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
829 }
830
831 /* set the outgoing interface */
832 if (ifname) {
833 #ifndef USE_SIN6_SCOPE_ID
834 /* pktinfo must have already been allocated */
835 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
836 errx(1, "%s: invalid interface name", ifname);
837 #else
838 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
839 errx(1, "%s: invalid interface name", ifname);
840 #endif
841 }
842 if (hoplimit != -1) {
843 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
844 scmsgp->cmsg_level = IPPROTO_IPV6;
845 scmsgp->cmsg_type = IPV6_HOPLIMIT;
846 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
847
848 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
849 }
850
851 if (!(options & F_SRCADDR)) {
852 /*
853 * get the source address. XXX since we revoked the root
854 * privilege, we cannot use a raw socket for this.
855 */
856 int dummy;
857 socklen_t len = sizeof(src);
858
859 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
860 err(1, "UDP socket");
861
862 src.sin6_family = AF_INET6;
863 src.sin6_addr = dst.sin6_addr;
864 src.sin6_port = ntohs(DUMMY_PORT);
865 src.sin6_scope_id = dst.sin6_scope_id;
866
867 #ifdef USE_RFC3542
868 if (pktinfo &&
869 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
870 (void *)pktinfo, sizeof(*pktinfo)))
871 err(1, "UDP setsockopt(IPV6_PKTINFO)");
872 if (hoplimit != -1 &&
873 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
874 (void *)&hoplimit, sizeof(hoplimit)))
875 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
876 if (hoplimit != -1 &&
877 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
878 (void *)&hoplimit, sizeof(hoplimit)))
879 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
880 if (rthdr &&
881 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
882 (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
883 err(1, "UDP setsockopt(IPV6_RTHDR)");
884 #else /* old advanced API */
885 if (smsghdr.msg_control &&
886 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
887 (void *)smsghdr.msg_control, smsghdr.msg_controllen))
888 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
889 #endif
890
891 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
892 err(1, "UDP connect");
893
894 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
895 err(1, "getsockname");
896
897 close(dummy);
898 }
899
900 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
901 if (sockbufsize) {
902 if (datalen > sockbufsize)
903 warnx("you need -b to increase socket buffer size");
904 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
905 sizeof(sockbufsize)) < 0)
906 err(1, "setsockopt(SO_SNDBUF)");
907 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
908 sizeof(sockbufsize)) < 0)
909 err(1, "setsockopt(SO_RCVBUF)");
910 }
911 else {
912 if (datalen > 8 * 1024) /*XXX*/
913 warnx("you need -b to increase socket buffer size");
914 /*
915 * When pinging the broadcast address, you can get a lot of
916 * answers. Doing something so evil is useful if you are trying
917 * to stress the ethernet, or just want to fill the arp cache
918 * to get some stuff for /etc/ethers.
919 */
920 hold = 48 * 1024;
921 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
922 sizeof(hold));
923 }
924 #endif
925
926 optval = 1;
927 #ifndef USE_SIN6_SCOPE_ID
928 #ifdef IPV6_RECVPKTINFO
929 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
930 sizeof(optval)) < 0)
931 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
932 #else /* old adv. API */
933 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
934 sizeof(optval)) < 0)
935 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
936 #endif
937 #endif /* USE_SIN6_SCOPE_ID */
938 #ifdef IPV6_RECVHOPLIMIT
939 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
940 sizeof(optval)) < 0)
941 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
942 #else /* old adv. API */
943 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
944 sizeof(optval)) < 0)
945 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
946 #endif
947
948 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
949 (unsigned long)(pingerlen() - 8));
950 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
951 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
952
953 while (preload--) /* Fire off them quickies. */
954 pinger();
955
956 signal(SIGINT, onsignal);
957 #ifdef SIGINFO
958 signal(SIGINFO, onsignal);
959 #endif
960
961 if ((options & F_FLOOD) == 0) {
962 signal(SIGALRM, onsignal);
963 itimer.it_interval = interval;
964 itimer.it_value = interval;
965 setitimer(ITIMER_REAL, &itimer, NULL);
966 if (ntransmitted == 0)
967 retransmit();
968 }
969
970 #ifndef HAVE_POLL_H
971 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
972 if ((fdmaskp = malloc(fdmasks)) == NULL)
973 err(1, "malloc");
974 #endif
975
976 seenalrm = seenint = 0;
977 #ifdef SIGINFO
978 seeninfo = 0;
979 #endif
980
981 /* For control (ancillary) data received from recvmsg() */
982 cm = (struct cmsghdr *)malloc(CONTROLLEN);
983 if (cm == NULL)
984 err(1, "malloc");
985
986 for (;;) {
987 struct msghdr m;
988 struct iovec iov[2];
989
990 /* signal handling */
991 if (seenalrm) {
992 retransmit();
993 seenalrm = 0;
994 continue;
995 }
996 if (seenint) {
997 onint(SIGINT);
998 seenint = 0;
999 continue;
1000 }
1001 #ifdef SIGINFO
1002 if (seeninfo) {
1003 summary();
1004 seeninfo = 0;
1005 continue;
1006 }
1007 #endif
1008
1009 if (options & F_FLOOD) {
1010 pinger();
1011 #ifdef HAVE_POLL_H
1012 timeout = 10;
1013 #else
1014 timeout.tv_sec = 0;
1015 timeout.tv_usec = 10000;
1016 tv = &timeout;
1017 #endif
1018 } else {
1019 #ifdef HAVE_POLL_H
1020 timeout = INFTIM;
1021 #else
1022 tv = NULL;
1023 #endif
1024 }
1025 #ifdef HAVE_POLL_H
1026 fdmaskp[0].fd = s;
1027 fdmaskp[0].events = POLLIN;
1028 cc = poll(fdmaskp, 1, timeout);
1029 #else
1030 memset(fdmaskp, 0, fdmasks);
1031 FD_SET(s, fdmaskp);
1032 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1033 #endif
1034 if (cc < 0) {
1035 if (errno != EINTR) {
1036 #ifdef HAVE_POLL_H
1037 warn("poll");
1038 #else
1039 warn("select");
1040 #endif
1041 sleep(1);
1042 }
1043 continue;
1044 } else if (cc == 0)
1045 continue;
1046
1047 m.msg_name = (caddr_t)&from;
1048 m.msg_namelen = sizeof(from);
1049 memset(&iov, 0, sizeof(iov));
1050 iov[0].iov_base = (caddr_t)packet;
1051 iov[0].iov_len = packlen;
1052 m.msg_iov = iov;
1053 m.msg_iovlen = 1;
1054 memset(cm, 0, CONTROLLEN);
1055 m.msg_control = (void *)cm;
1056 m.msg_controllen = CONTROLLEN;
1057
1058 cc = recvmsg(s, &m, 0);
1059 if (cc < 0) {
1060 if (errno != EINTR) {
1061 warn("recvmsg");
1062 sleep(1);
1063 }
1064 continue;
1065 } else if (cc == 0) {
1066 int mtu;
1067
1068 /*
1069 * receive control messages only. Process the
1070 * exceptions (currently the only possiblity is
1071 * a path MTU notification.)
1072 */
1073 if ((mtu = get_pathmtu(&m)) > 0) {
1074 if ((options & F_VERBOSE) != 0) {
1075 printf("new path MTU (%d) is "
1076 "notified\n", mtu);
1077 }
1078 }
1079 continue;
1080 } else {
1081 /*
1082 * an ICMPv6 message (probably an echoreply) arrived.
1083 */
1084 pr_pack(packet, cc, &m);
1085 }
1086 if (npackets && nreceived >= npackets)
1087 break;
1088 }
1089 summary();
1090 exit(nreceived == 0);
1091 }
1092
1093 void
1094 onsignal(int sig)
1095 {
1096 switch (sig) {
1097 case SIGALRM:
1098 seenalrm++;
1099 break;
1100 case SIGINT:
1101 seenint++;
1102 break;
1103 #ifdef SIGINFO
1104 case SIGINFO:
1105 seeninfo++;
1106 break;
1107 #endif
1108 }
1109 }
1110
1111 /*
1112 * retransmit --
1113 * This routine transmits another ping6.
1114 */
1115 void
1116 retransmit(void)
1117 {
1118 struct itimerval itimer;
1119
1120 if (pinger() == 0)
1121 return;
1122
1123 /*
1124 * If we're not transmitting any more packets, change the timer
1125 * to wait two round-trip times if we've received any packets or
1126 * ten seconds if we haven't.
1127 */
1128 #define MAXWAIT 10
1129 if (nreceived) {
1130 itimer.it_value.tv_sec = 2 * tmax / 1000;
1131 if (itimer.it_value.tv_sec == 0)
1132 itimer.it_value.tv_sec = 1;
1133 } else
1134 itimer.it_value.tv_sec = MAXWAIT;
1135 itimer.it_interval.tv_sec = 0;
1136 itimer.it_interval.tv_usec = 0;
1137 itimer.it_value.tv_usec = 0;
1138
1139 signal(SIGALRM, onint);
1140 setitimer(ITIMER_REAL, &itimer, NULL);
1141 }
1142
1143 /*
1144 * pinger --
1145 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1146 * will be added on by the kernel. The ID field is our UNIX process ID,
1147 * and the sequence number is an ascending integer. The first 8 bytes
1148 * of the data portion are used to hold a UNIX "timeval" struct in VAX
1149 * byte-order, to compute the round-trip time.
1150 */
1151 size_t
1152 pingerlen(void)
1153 {
1154 size_t l;
1155
1156 if (options & F_FQDN)
1157 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1158 else if (options & F_FQDNOLD)
1159 l = ICMP6_NIQLEN;
1160 else if (options & F_NODEADDR)
1161 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1162 else if (options & F_SUPTYPES)
1163 l = ICMP6_NIQLEN;
1164 else
1165 l = ICMP6ECHOLEN + datalen;
1166
1167 return l;
1168 }
1169
1170 int
1171 pinger(void)
1172 {
1173 struct icmp6_hdr *icp;
1174 struct iovec iov[2];
1175 int i, cc;
1176 struct icmp6_nodeinfo *nip;
1177 int seq;
1178
1179 if (npackets && ntransmitted >= npackets)
1180 return(-1); /* no more transmission */
1181
1182 icp = (struct icmp6_hdr *)outpack;
1183 nip = (struct icmp6_nodeinfo *)outpack;
1184 memset(icp, 0, sizeof(*icp));
1185 icp->icmp6_cksum = 0;
1186 seq = ntransmitted++;
1187 CLR(seq % mx_dup_ck);
1188
1189 if (options & F_FQDN) {
1190 icp->icmp6_type = ICMP6_NI_QUERY;
1191 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1192 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1193 nip->ni_flags = htons(0);
1194
1195 memcpy(nip->icmp6_ni_nonce, nonce,
1196 sizeof(nip->icmp6_ni_nonce));
1197 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1198
1199 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1200 sizeof(dst.sin6_addr));
1201 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1202 datalen = 0;
1203 } else if (options & F_FQDNOLD) {
1204 /* packet format in 03 draft - no Subject data on queries */
1205 icp->icmp6_type = ICMP6_NI_QUERY;
1206 icp->icmp6_code = 0; /* code field is always 0 */
1207 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1208 nip->ni_flags = htons(0);
1209
1210 memcpy(nip->icmp6_ni_nonce, nonce,
1211 sizeof(nip->icmp6_ni_nonce));
1212 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1213
1214 cc = ICMP6_NIQLEN;
1215 datalen = 0;
1216 } else if (options & F_NODEADDR) {
1217 icp->icmp6_type = ICMP6_NI_QUERY;
1218 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1219 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1220 nip->ni_flags = naflags;
1221
1222 memcpy(nip->icmp6_ni_nonce, nonce,
1223 sizeof(nip->icmp6_ni_nonce));
1224 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1225
1226 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1227 sizeof(dst.sin6_addr));
1228 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1229 datalen = 0;
1230 } else if (options & F_SUPTYPES) {
1231 icp->icmp6_type = ICMP6_NI_QUERY;
1232 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/
1233 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1234 /* we support compressed bitmap */
1235 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1236
1237 memcpy(nip->icmp6_ni_nonce, nonce,
1238 sizeof(nip->icmp6_ni_nonce));
1239 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1240 cc = ICMP6_NIQLEN;
1241 datalen = 0;
1242 } else {
1243 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1244 icp->icmp6_code = 0;
1245 icp->icmp6_id = htons(ident);
1246 icp->icmp6_seq = ntohs(seq);
1247 if (timing) {
1248 struct timeval tv;
1249 struct tv32 *tv32;
1250 gettimeofday(&tv, NULL);
1251 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1252 tv32->tv32_sec = htonl(tv.tv_sec);
1253 tv32->tv32_usec = htonl(tv.tv_usec);
1254 }
1255 cc = ICMP6ECHOLEN + datalen;
1256 }
1257
1258 #ifdef DIAGNOSTIC
1259 if (pingerlen() != cc)
1260 errx(1, "internal error; length mismatch");
1261 #endif
1262
1263 smsghdr.msg_name = (caddr_t)&dst;
1264 smsghdr.msg_namelen = sizeof(dst);
1265 memset(&iov, 0, sizeof(iov));
1266 iov[0].iov_base = (caddr_t)outpack;
1267 iov[0].iov_len = cc;
1268 smsghdr.msg_iov = iov;
1269 smsghdr.msg_iovlen = 1;
1270
1271 i = sendmsg(s, &smsghdr, 0);
1272
1273 if (i < 0 || i != cc) {
1274 if (i < 0)
1275 warn("sendmsg");
1276 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i);
1277 }
1278 if (!(options & F_QUIET) && options & F_FLOOD)
1279 write(STDOUT_FILENO, &DOT, 1);
1280
1281 return(0);
1282 }
1283
1284 int
1285 myechoreply(const struct icmp6_hdr *icp)
1286 {
1287 if (ntohs(icp->icmp6_id) == ident)
1288 return 1;
1289 else
1290 return 0;
1291 }
1292
1293 int
1294 mynireply(const struct icmp6_nodeinfo *nip)
1295 {
1296 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1297 nonce + sizeof(u_int16_t),
1298 sizeof(nonce) - sizeof(u_int16_t)) == 0)
1299 return 1;
1300 else
1301 return 0;
1302 }
1303
1304 char *
1305 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1306 size_t bufsiz)
1307 {
1308 int i = 0;
1309 const u_char *cp;
1310 char cresult[MAXDNAME + 1];
1311 const u_char *comp;
1312 int l;
1313
1314 cp = *sp;
1315 *buf = '\0';
1316
1317 if (cp >= ep)
1318 return NULL;
1319 while (cp < ep) {
1320 i = *cp;
1321 if (i == 0 || cp != *sp) {
1322 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1323 return NULL; /*result overrun*/
1324 }
1325 if (i == 0)
1326 break;
1327 cp++;
1328
1329 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1330 /* DNS compression */
1331 if (!base)
1332 return NULL;
1333
1334 comp = base + (i & 0x3f);
1335 if (dnsdecode(&comp, cp, base, cresult,
1336 sizeof(cresult)) == NULL)
1337 return NULL;
1338 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1339 return NULL; /*result overrun*/
1340 break;
1341 } else if ((i & 0x3f) == i) {
1342 if (i > ep - cp)
1343 return NULL; /*source overrun*/
1344 while (i-- > 0 && cp < ep) {
1345 l = snprintf(cresult, sizeof(cresult),
1346 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1347 if (l >= (int)sizeof(cresult) || l < 0)
1348 return NULL;
1349 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1350 return NULL; /*result overrun*/
1351 cp++;
1352 }
1353 } else
1354 return NULL; /*invalid label*/
1355 }
1356 if (i != 0)
1357 return NULL; /*not terminated*/
1358 cp++;
1359 *sp = cp;
1360 return buf;
1361 }
1362
1363 /*
1364 * pr_pack --
1365 * Print out the packet, if it came from us. This logic is necessary
1366 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1367 * which arrive ('tis only fair). This permits multiple copies of this
1368 * program to be run without having intermingled output (or statistics!).
1369 */
1370 void
1371 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1372 {
1373 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
1374 struct icmp6_hdr *icp;
1375 struct icmp6_nodeinfo *ni;
1376 int i;
1377 int hoplim;
1378 struct sockaddr *from;
1379 int fromlen;
1380 u_char *cp = NULL, *dp, *end = buf + cc;
1381 struct in6_pktinfo *pktinfo = NULL;
1382 struct timeval tv, tp;
1383 struct tv32 *tpp;
1384 double triptime = 0;
1385 int dupflag;
1386 size_t off;
1387 int oldfqdn;
1388 u_int16_t seq;
1389 char dnsname[MAXDNAME + 1];
1390
1391 gettimeofday(&tv, NULL);
1392
1393 if (!mhdr || !mhdr->msg_name ||
1394 mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1395 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1396 if (options & F_VERBOSE)
1397 warnx("invalid peername");
1398 return;
1399 }
1400 from = (struct sockaddr *)mhdr->msg_name;
1401 fromlen = mhdr->msg_namelen;
1402 if (cc < (int)sizeof(struct icmp6_hdr)) {
1403 if (options & F_VERBOSE)
1404 warnx("packet too short (%d bytes) from %s", cc,
1405 pr_addr(from, fromlen));
1406 return;
1407 }
1408 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1409 (options & F_VERBOSE) != 0)
1410 warnx("some control data discarded, insufficient buffer size");
1411 icp = (struct icmp6_hdr *)buf;
1412 ni = (struct icmp6_nodeinfo *)buf;
1413 off = 0;
1414
1415 if ((hoplim = get_hoplim(mhdr)) == -1) {
1416 warnx("failed to get receiving hop limit");
1417 return;
1418 }
1419 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1420 warnx("failed to get receiving packet information");
1421 return;
1422 }
1423
1424 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1425 seq = ntohs(icp->icmp6_seq);
1426 ++nreceived;
1427 if (timing) {
1428 tpp = (struct tv32 *)(icp + 1);
1429 tp.tv_sec = ntohl(tpp->tv32_sec);
1430 tp.tv_usec = ntohl(tpp->tv32_usec);
1431 tvsub(&tv, &tp);
1432 triptime = ((double)tv.tv_sec) * 1000.0 +
1433 ((double)tv.tv_usec) / 1000.0;
1434 tsum += triptime;
1435 tsumsq += triptime * triptime;
1436 if (triptime < tmin)
1437 tmin = triptime;
1438 if (triptime > tmax)
1439 tmax = triptime;
1440 }
1441
1442 if (TST(seq % mx_dup_ck)) {
1443 ++nrepeats;
1444 --nreceived;
1445 dupflag = 1;
1446 } else {
1447 SET(seq % mx_dup_ck);
1448 dupflag = 0;
1449 }
1450
1451 if (options & F_QUIET)
1452 return;
1453
1454 if (options & F_FLOOD)
1455 write(STDOUT_FILENO, &BSPACE, 1);
1456 else {
1457 printf("%d bytes from %s, icmp_seq=%u", cc,
1458 pr_addr(from, fromlen), seq);
1459 printf(" hlim=%d", hoplim);
1460 if ((options & F_VERBOSE) != 0) {
1461 struct sockaddr_in6 dstsa;
1462
1463 memset(&dstsa, 0, sizeof(dstsa));
1464 dstsa.sin6_family = AF_INET6;
1465 dstsa.sin6_len = sizeof(dstsa);
1466 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1467 dstsa.sin6_addr = pktinfo->ipi6_addr;
1468 printf(" dst=%s",
1469 pr_addr((struct sockaddr *)&dstsa,
1470 sizeof(dstsa)));
1471 }
1472 if (timing)
1473 printf(" time=%.3f ms", triptime);
1474 if (dupflag)
1475 printf("(DUP!)");
1476 /* check the data */
1477 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1478 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1479 for (i = 8; cp < end; ++i, ++cp, ++dp) {
1480 if (*cp != *dp) {
1481 printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1482 break;
1483 }
1484 }
1485 }
1486 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1487 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1488 ++nreceived;
1489 if (TST(seq % mx_dup_ck)) {
1490 ++nrepeats;
1491 --nreceived;
1492 dupflag = 1;
1493 } else {
1494 SET(seq % mx_dup_ck);
1495 dupflag = 0;
1496 }
1497
1498 if (options & F_QUIET)
1499 return;
1500
1501 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1502
1503 switch (ntohs(ni->ni_code)) {
1504 case ICMP6_NI_SUCCESS:
1505 break;
1506 case ICMP6_NI_REFUSED:
1507 printf("refused, type 0x%x", ntohs(ni->ni_type));
1508 goto fqdnend;
1509 case ICMP6_NI_UNKNOWN:
1510 printf("unknown, type 0x%x", ntohs(ni->ni_type));
1511 goto fqdnend;
1512 default:
1513 printf("unknown code 0x%x, type 0x%x",
1514 ntohs(ni->ni_code), ntohs(ni->ni_type));
1515 goto fqdnend;
1516 }
1517
1518 switch (ntohs(ni->ni_qtype)) {
1519 case NI_QTYPE_NOOP:
1520 printf("NodeInfo NOOP");
1521 break;
1522 case NI_QTYPE_SUPTYPES:
1523 pr_suptypes(ni, end - (u_char *)ni);
1524 break;
1525 case NI_QTYPE_NODEADDR:
1526 pr_nodeaddr(ni, end - (u_char *)ni);
1527 break;
1528 case NI_QTYPE_FQDN:
1529 default: /* XXX: for backward compatibility */
1530 cp = (u_char *)ni + ICMP6_NIRLEN;
1531 if (buf[off + ICMP6_NIRLEN] ==
1532 cc - off - ICMP6_NIRLEN - 1)
1533 oldfqdn = 1;
1534 else
1535 oldfqdn = 0;
1536 if (oldfqdn) {
1537 cp++; /* skip length */
1538 while (cp < end) {
1539 safeputc(*cp & 0xff);
1540 cp++;
1541 }
1542 } else {
1543 i = 0;
1544 while (cp < end) {
1545 if (dnsdecode((const u_char **)(uintptr_t)&cp, end,
1546 (const u_char *)(ni + 1), dnsname,
1547 sizeof(dnsname)) == NULL) {
1548 printf("???");
1549 break;
1550 }
1551 /*
1552 * name-lookup special handling for
1553 * truncated name
1554 */
1555 if (cp + 1 <= end && !*cp &&
1556 strlen(dnsname) > 0) {
1557 dnsname[strlen(dnsname) - 1] = '\0';
1558 cp++;
1559 }
1560 printf("%s%s", i > 0 ? "," : "",
1561 dnsname);
1562 }
1563 }
1564 if (options & F_VERBOSE) {
1565 int32_t ttl;
1566 int comma = 0;
1567
1568 printf(" ("); /*)*/
1569
1570 switch (ni->ni_code) {
1571 case ICMP6_NI_REFUSED:
1572 printf("refused");
1573 comma++;
1574 break;
1575 case ICMP6_NI_UNKNOWN:
1576 printf("unknown qtype");
1577 comma++;
1578 break;
1579 }
1580
1581 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1582 /* case of refusion, unknown */
1583 /*(*/
1584 putchar(')');
1585 goto fqdnend;
1586 }
1587 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1588 if (comma)
1589 printf(",");
1590 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1591 printf("TTL=%d:meaningless",
1592 (int)ttl);
1593 } else {
1594 if (ttl < 0) {
1595 printf("TTL=%d:invalid", ttl);
1596 } else
1597 printf("TTL=%d", ttl);
1598 }
1599 comma++;
1600
1601 if (oldfqdn) {
1602 if (comma)
1603 printf(",");
1604 printf("03 draft");
1605 comma++;
1606 } else {
1607 cp = (u_char *)ni + ICMP6_NIRLEN;
1608 if (cp == end) {
1609 if (comma)
1610 printf(",");
1611 printf("no name");
1612 comma++;
1613 }
1614 }
1615
1616 if (buf[off + ICMP6_NIRLEN] !=
1617 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1618 if (comma)
1619 printf(",");
1620 printf("invalid namelen:%d/%lu",
1621 buf[off + ICMP6_NIRLEN],
1622 (u_long)cc - off - ICMP6_NIRLEN - 1);
1623 comma++;
1624 }
1625 /*(*/
1626 putchar(')');
1627 }
1628 fqdnend:
1629 ;
1630 }
1631 } else {
1632 /* We've got something other than an ECHOREPLY */
1633 if (!(options & F_VERBOSE))
1634 return;
1635 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1636 pr_icmph(icp, end);
1637 }
1638
1639 if (!(options & F_FLOOD)) {
1640 putchar('\n');
1641 if (options & F_VERBOSE)
1642 pr_exthdrs(mhdr);
1643 fflush(stdout);
1644 }
1645 #undef safeputc
1646 }
1647
1648 void
1649 pr_exthdrs(struct msghdr *mhdr)
1650 {
1651 ssize_t bufsize;
1652 void *bufp;
1653 struct cmsghdr *cm;
1654
1655 bufsize = 0;
1656 bufp = mhdr->msg_control;
1657 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1658 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1659 if (cm->cmsg_level != IPPROTO_IPV6)
1660 continue;
1661
1662 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1663 if (bufsize <= 0)
1664 continue;
1665 switch (cm->cmsg_type) {
1666 case IPV6_HOPOPTS:
1667 printf(" HbH Options: ");
1668 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1669 break;
1670 case IPV6_DSTOPTS:
1671 #ifdef IPV6_RTHDRDSTOPTS
1672 case IPV6_RTHDRDSTOPTS:
1673 #endif
1674 printf(" Dst Options: ");
1675 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1676 break;
1677 case IPV6_RTHDR:
1678 printf(" Routing: ");
1679 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1680 break;
1681 }
1682 }
1683 }
1684
1685 #ifdef USE_RFC3542
1686 void
1687 pr_ip6opt(void *extbuf, size_t bufsize)
1688 {
1689 struct ip6_hbh *ext;
1690 int currentlen;
1691 u_int8_t type;
1692 socklen_t extlen, len;
1693 void *databuf;
1694 size_t offset;
1695 u_int16_t value2;
1696 u_int32_t value4;
1697
1698 ext = (struct ip6_hbh *)extbuf;
1699 extlen = (ext->ip6h_len + 1) * 8;
1700 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1701 (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1702
1703 /*
1704 * Bounds checking on the ancillary data buffer:
1705 * subtract the size of a cmsg structure from the buffer size.
1706 */
1707 if (bufsize < (extlen + CMSG_SPACE(0))) {
1708 extlen = bufsize - CMSG_SPACE(0);
1709 warnx("options truncated, showing only %u (total=%u)",
1710 (unsigned int)(extlen / 8 - 1),
1711 (unsigned int)(ext->ip6h_len));
1712 }
1713
1714 currentlen = 0;
1715 while (1) {
1716 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1717 &type, &len, &databuf);
1718 if (currentlen == -1)
1719 break;
1720 switch (type) {
1721 /*
1722 * Note that inet6_opt_next automatically skips any padding
1723 * optins.
1724 */
1725 case IP6OPT_JUMBO:
1726 offset = 0;
1727 offset = inet6_opt_get_val(databuf, offset,
1728 &value4, sizeof(value4));
1729 printf(" Jumbo Payload Opt: Length %u\n",
1730 (u_int32_t)ntohl(value4));
1731 break;
1732 /* FIXME: RFC3542 option is IP6OPT_ROUTER_ALERT. */
1733 case IP6OPT_RTALERT:
1734 offset = 0;
1735 offset = inet6_opt_get_val(databuf, offset,
1736 &value2, sizeof(value2));
1737 printf(" Router Alert Opt: Type %u\n",
1738 ntohs(value2));
1739 break;
1740 default:
1741 printf(" Received Opt %u len %lu\n",
1742 type, (unsigned long)len);
1743 break;
1744 }
1745 }
1746 return;
1747 }
1748 #else /* !USE_RFC3542 */
1749 /* ARGSUSED */
1750 void
1751 pr_ip6opt(void *extbuf __unused, size_t bufsize __unused)
1752 {
1753 putchar('\n');
1754 return;
1755 }
1756 #endif /* USE_RFC3542 */
1757
1758 #ifdef USE_RFC3542
1759 void
1760 pr_rthdr(void *extbuf, size_t bufsize __unused)
1761 {
1762 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1763
1764 /* print fixed part of the header */
1765 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1766 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1767 printf("segments unknown, ");
1768 printf("%d left\n", rh->ip6r_segleft);
1769 return;
1770
1771 }
1772
1773 #else /* !USE_RFC3542 */
1774 /* ARGSUSED */
1775 void
1776 pr_rthdr(void *extbuf __unused)
1777 {
1778 putchar('\n');
1779 return;
1780 }
1781 #endif /* USE_RFC3542 */
1782
1783 int
1784 pr_bitrange(u_int32_t v, int soff, int ii)
1785 {
1786 int off;
1787 int i;
1788
1789 off = 0;
1790 while (off < 32) {
1791 /* shift till we have 0x01 */
1792 if ((v & 0x01) == 0) {
1793 if (ii > 1)
1794 printf("-%u", soff + off - 1);
1795 ii = 0;
1796 switch (v & 0x0f) {
1797 case 0x00:
1798 v >>= 4;
1799 off += 4;
1800 continue;
1801 case 0x08:
1802 v >>= 3;
1803 off += 3;
1804 continue;
1805 case 0x04: case 0x0c:
1806 v >>= 2;
1807 off += 2;
1808 continue;
1809 default:
1810 v >>= 1;
1811 off += 1;
1812 continue;
1813 }
1814 }
1815
1816 /* we have 0x01 with us */
1817 for (i = 0; i < 32 - off; i++) {
1818 if ((v & (0x01 << i)) == 0)
1819 break;
1820 }
1821 if (!ii)
1822 printf(" %u", soff + off);
1823 ii += i;
1824 v >>= i; off += i;
1825 }
1826 return ii;
1827 }
1828
1829 /* struct icmp6_nodeinfo *ni: ni->qtype must be SUPTYPES */
1830 void
1831 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1832 {
1833 size_t clen;
1834 u_int32_t v;
1835 const u_char *cp, *end;
1836 u_int16_t cur;
1837 struct cbit {
1838 u_int16_t words; /*32bit count*/
1839 u_int16_t skip;
1840 } cbit;
1841 #define MAXQTYPES (1 << 16)
1842 size_t off;
1843 int b;
1844
1845 cp = (u_char *)(ni + 1);
1846 end = ((u_char *)ni) + nilen;
1847 cur = 0;
1848 b = 0;
1849
1850 printf("NodeInfo Supported Qtypes");
1851 if (options & F_VERBOSE) {
1852 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1853 printf(", compressed bitmap");
1854 else
1855 printf(", raw bitmap");
1856 }
1857
1858 while (cp < end) {
1859 clen = (size_t)(end - cp);
1860 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1861 if (clen == 0 || clen > MAXQTYPES / 8 ||
1862 clen % sizeof(v)) {
1863 printf("???");
1864 return;
1865 }
1866 } else {
1867 if (clen < sizeof(cbit) || clen % sizeof(v))
1868 return;
1869 memcpy(&cbit, cp, sizeof(cbit));
1870 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
1871 clen)
1872 return;
1873 cp += sizeof(cbit);
1874 clen = ntohs(cbit.words) * sizeof(v);
1875 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
1876 MAXQTYPES)
1877 return;
1878 }
1879
1880 for (off = 0; off < clen; off += sizeof(v)) {
1881 memcpy(&v, cp + off, sizeof(v));
1882 v = (u_int32_t)ntohl(v);
1883 b = pr_bitrange(v, (int)(cur + off * 8), b);
1884 }
1885 /* flush the remaining bits */
1886 b = pr_bitrange(0, (int)(cur + off * 8), b);
1887
1888 cp += clen;
1889 cur += clen * 8;
1890 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
1891 cur += ntohs(cbit.skip) * 32;
1892 }
1893 }
1894
1895 /* struct icmp6_nodeinfo *ni: ni->qtype must be NODEADDR */
1896 void
1897 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
1898 {
1899 u_char *cp = (u_char *)(ni + 1);
1900 char ntop_buf[INET6_ADDRSTRLEN];
1901 int withttl = 0;
1902
1903 nilen -= sizeof(struct icmp6_nodeinfo);
1904
1905 if (options & F_VERBOSE) {
1906 switch (ni->ni_code) {
1907 case ICMP6_NI_REFUSED:
1908 printf("refused");
1909 break;
1910 case ICMP6_NI_UNKNOWN:
1911 printf("unknown qtype");
1912 break;
1913 }
1914 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
1915 printf(" truncated");
1916 }
1917 putchar('\n');
1918 if (nilen <= 0)
1919 printf(" no address\n");
1920
1921 /*
1922 * In icmp-name-lookups 05 and later, TTL of each returned address
1923 * is contained in the resposne. We try to detect the version
1924 * by the length of the data, but note that the detection algorithm
1925 * is incomplete. We assume the latest draft by default.
1926 */
1927 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
1928 withttl = 1;
1929 while (nilen > 0) {
1930 u_int32_t ttl = 0;
1931
1932 if (withttl) {
1933 /* XXX: alignment? */
1934 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
1935 cp += sizeof(u_int32_t);
1936 nilen -= sizeof(u_int32_t);
1937 }
1938
1939 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
1940 NULL)
1941 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
1942 printf(" %s", ntop_buf);
1943 if (withttl) {
1944 if (ttl == 0xffffffff) {
1945 /*
1946 * XXX: can this convention be applied to all
1947 * type of TTL (i.e. non-ND TTL)?
1948 */
1949 printf("(TTL=infty)");
1950 }
1951 else
1952 printf("(TTL=%u)", ttl);
1953 }
1954 putchar('\n');
1955
1956 nilen -= sizeof(struct in6_addr);
1957 cp += sizeof(struct in6_addr);
1958 }
1959 }
1960
1961 int
1962 get_hoplim(struct msghdr *mhdr)
1963 {
1964 struct cmsghdr *cm;
1965
1966 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1967 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1968 if (cm->cmsg_len == 0)
1969 return(-1);
1970
1971 if (cm->cmsg_level == IPPROTO_IPV6 &&
1972 cm->cmsg_type == IPV6_HOPLIMIT &&
1973 cm->cmsg_len == CMSG_LEN(sizeof(int)))
1974 return(*(int *)CMSG_DATA(cm));
1975 }
1976
1977 return(-1);
1978 }
1979
1980 struct in6_pktinfo *
1981 get_rcvpktinfo(struct msghdr *mhdr)
1982 {
1983 struct cmsghdr *cm;
1984
1985 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1986 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1987 if (cm->cmsg_len == 0)
1988 return(NULL);
1989
1990 if (cm->cmsg_level == IPPROTO_IPV6 &&
1991 cm->cmsg_type == IPV6_PKTINFO &&
1992 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
1993 return((struct in6_pktinfo *)CMSG_DATA(cm));
1994 }
1995
1996 return(NULL);
1997 }
1998
1999 #ifdef IPV6_RECVPATHMTU
2000 int
2001 get_pathmtu(struct msghdr *mhdr)
2002 {
2003 struct cmsghdr *cm;
2004 struct ip6_mtuinfo *mtuctl = NULL;
2005
2006 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2007 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2008 if (cm->cmsg_len == 0)
2009 return(0);
2010
2011 if (cm->cmsg_level == IPPROTO_IPV6 &&
2012 cm->cmsg_type == IPV6_PATHMTU &&
2013 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2014 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2015
2016 /*
2017 * If the notified destination is different from
2018 * the one we are pinging, just ignore the info.
2019 * We check the scope ID only when both notified value
2020 * and our own value have non-0 values, because we may
2021 * have used the default scope zone ID for sending,
2022 * in which case the scope ID value is 0.
2023 */
2024 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2025 &dst.sin6_addr) ||
2026 (mtuctl->ip6m_addr.sin6_scope_id &&
2027 dst.sin6_scope_id &&
2028 mtuctl->ip6m_addr.sin6_scope_id !=
2029 dst.sin6_scope_id)) {
2030 if ((options & F_VERBOSE) != 0) {
2031 printf("path MTU for %s is notified. "
2032 "(ignored)\n",
2033 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2034 sizeof(mtuctl->ip6m_addr)));
2035 }
2036 return(0);
2037 }
2038
2039 /*
2040 * Ignore an invalid MTU. XXX: can we just believe
2041 * the kernel check?
2042 */
2043 if (mtuctl->ip6m_mtu < IPV6_MMTU)
2044 return(0);
2045
2046 /* notification for our destination. return the MTU. */
2047 return((int)mtuctl->ip6m_mtu);
2048 }
2049 }
2050 return(0);
2051 }
2052 #endif
2053
2054 /*
2055 * tvsub --
2056 * Subtract 2 timeval structs: out = out - in. Out is assumed to
2057 * be >= in.
2058 */
2059 void
2060 tvsub(struct timeval *out, struct timeval *in)
2061 {
2062 if ((out->tv_usec -= in->tv_usec) < 0) {
2063 --out->tv_sec;
2064 out->tv_usec += 1000000;
2065 }
2066 out->tv_sec -= in->tv_sec;
2067 }
2068
2069 /*
2070 * onint --
2071 * SIGINT handler.
2072 */
2073 /* ARGSUSED */
2074 void
2075 onint(int sig __unused)
2076 {
2077 summary();
2078
2079 signal(SIGINT, SIG_DFL);
2080 kill(getpid(), SIGINT);
2081
2082 /* NOTREACHED */
2083 exit(1);
2084 }
2085
2086 /*
2087 * summary --
2088 * Print out statistics.
2089 */
2090 void
2091 summary(void)
2092 {
2093
2094 printf("\n--- %s ping6 statistics ---\n", hostname);
2095 printf("%ld packets transmitted, ", ntransmitted);
2096 printf("%ld packets received, ", nreceived);
2097 if (nrepeats)
2098 printf("+%ld duplicates, ", nrepeats);
2099 if (ntransmitted) {
2100 if (nreceived > ntransmitted)
2101 printf("-- somebody's duplicating packets!");
2102 else
2103 printf("%.1f%% packet loss",
2104 ((((double)ntransmitted - nreceived) * 100.0) /
2105 ntransmitted));
2106 }
2107 putchar('\n');
2108 if (nreceived && timing) {
2109 /* Only display average to microseconds */
2110 double num = nreceived + nrepeats;
2111 double avg = tsum / num;
2112 double dev = sqrt(tsumsq / num - avg * avg);
2113 printf(
2114 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2115 tmin, avg, tmax, dev);
2116 fflush(stdout);
2117 }
2118 fflush(stdout);
2119 }
2120
2121 /*subject type*/
2122 static const char *niqcode[] = {
2123 "IPv6 address",
2124 "DNS label", /*or empty*/
2125 "IPv4 address",
2126 };
2127
2128 /*result code*/
2129 static const char *nircode[] = {
2130 "Success", "Refused", "Unknown",
2131 };
2132
2133
2134 /*
2135 * pr_icmph --
2136 * Print a descriptive string about an ICMP header.
2137 */
2138 void
2139 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2140 {
2141 char ntop_buf[INET6_ADDRSTRLEN];
2142 struct nd_redirect *red;
2143 struct icmp6_nodeinfo *ni;
2144 char dnsname[MAXDNAME + 1];
2145 const u_char *cp;
2146 size_t l;
2147
2148 switch (icp->icmp6_type) {
2149 case ICMP6_DST_UNREACH:
2150 switch (icp->icmp6_code) {
2151 case ICMP6_DST_UNREACH_NOROUTE:
2152 printf("No Route to Destination\n");
2153 break;
2154 case ICMP6_DST_UNREACH_ADMIN:
2155 printf("Destination Administratively "
2156 "Unreachable\n");
2157 break;
2158 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2159 printf("Destination Unreachable Beyond Scope\n");
2160 break;
2161 case ICMP6_DST_UNREACH_ADDR:
2162 printf("Destination Host Unreachable\n");
2163 break;
2164 case ICMP6_DST_UNREACH_NOPORT:
2165 printf("Destination Port Unreachable\n");
2166 break;
2167 default:
2168 printf("Destination Unreachable, Bad Code: %d\n",
2169 icp->icmp6_code);
2170 break;
2171 }
2172 /* Print returned IP header information */
2173 pr_retip((struct ip6_hdr *)(icp + 1), end);
2174 break;
2175 case ICMP6_PACKET_TOO_BIG:
2176 printf("Packet too big mtu = %d\n",
2177 (int)ntohl(icp->icmp6_mtu));
2178 pr_retip((struct ip6_hdr *)(icp + 1), end);
2179 break;
2180 case ICMP6_TIME_EXCEEDED:
2181 switch (icp->icmp6_code) {
2182 case ICMP6_TIME_EXCEED_TRANSIT:
2183 printf("Time to live exceeded\n");
2184 break;
2185 case ICMP6_TIME_EXCEED_REASSEMBLY:
2186 printf("Frag reassembly time exceeded\n");
2187 break;
2188 default:
2189 printf("Time exceeded, Bad Code: %d\n",
2190 icp->icmp6_code);
2191 break;
2192 }
2193 pr_retip((struct ip6_hdr *)(icp + 1), end);
2194 break;
2195 case ICMP6_PARAM_PROB:
2196 printf("Parameter problem: ");
2197 switch (icp->icmp6_code) {
2198 case ICMP6_PARAMPROB_HEADER:
2199 printf("Erroneous Header ");
2200 break;
2201 case ICMP6_PARAMPROB_NEXTHEADER:
2202 printf("Unknown Nextheader ");
2203 break;
2204 case ICMP6_PARAMPROB_OPTION:
2205 printf("Unrecognized Option ");
2206 break;
2207 default:
2208 printf("Bad code(%d) ", icp->icmp6_code);
2209 break;
2210 }
2211 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr));
2212 pr_retip((struct ip6_hdr *)(icp + 1), end);
2213 break;
2214 case ICMP6_ECHO_REQUEST:
2215 printf("Echo Request");
2216 /* XXX ID + Seq + Data */
2217 break;
2218 case ICMP6_ECHO_REPLY:
2219 printf("Echo Reply");
2220 /* XXX ID + Seq + Data */
2221 break;
2222 case ICMP6_MEMBERSHIP_QUERY:
2223 printf("Listener Query");
2224 break;
2225 case ICMP6_MEMBERSHIP_REPORT:
2226 printf("Listener Report");
2227 break;
2228 case ICMP6_MEMBERSHIP_REDUCTION:
2229 printf("Listener Done");
2230 break;
2231 case ND_ROUTER_SOLICIT:
2232 printf("Router Solicitation");
2233 break;
2234 case ND_ROUTER_ADVERT:
2235 printf("Router Advertisement");
2236 break;
2237 case ND_NEIGHBOR_SOLICIT:
2238 printf("Neighbor Solicitation");
2239 break;
2240 case ND_NEIGHBOR_ADVERT:
2241 printf("Neighbor Advertisement");
2242 break;
2243 case ND_REDIRECT:
2244 red = (struct nd_redirect *)icp;
2245 printf("Redirect\n");
2246 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2247 sizeof(ntop_buf)))
2248 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2249 printf("Destination: %s", ntop_buf);
2250 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2251 sizeof(ntop_buf)))
2252 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2253 printf(" New Target: %s", ntop_buf);
2254 break;
2255 case ICMP6_NI_QUERY:
2256 printf("Node Information Query");
2257 /* XXX ID + Seq + Data */
2258 ni = (struct icmp6_nodeinfo *)icp;
2259 l = end - (u_char *)(ni + 1);
2260 printf(", ");
2261 switch (ntohs(ni->ni_qtype)) {
2262 case NI_QTYPE_NOOP:
2263 printf("NOOP");
2264 break;
2265 case NI_QTYPE_SUPTYPES:
2266 printf("Supported qtypes");
2267 break;
2268 case NI_QTYPE_FQDN:
2269 printf("DNS name");
2270 break;
2271 case NI_QTYPE_NODEADDR:
2272 printf("nodeaddr");
2273 break;
2274 case NI_QTYPE_IPV4ADDR:
2275 printf("IPv4 nodeaddr");
2276 break;
2277 default:
2278 printf("unknown qtype");
2279 break;
2280 }
2281 if (options & F_VERBOSE) {
2282 switch (ni->ni_code) {
2283 case ICMP6_NI_SUBJ_IPV6:
2284 if (l == sizeof(struct in6_addr) &&
2285 inet_ntop(AF_INET6, ni + 1, ntop_buf,
2286 sizeof(ntop_buf)) != NULL) {
2287 printf(", subject=%s(%s)",
2288 niqcode[ni->ni_code], ntop_buf);
2289 } else {
2290 #if 1
2291 /* backward compat to -W */
2292 printf(", oldfqdn");
2293 #else
2294 printf(", invalid");
2295 #endif
2296 }
2297 break;
2298 case ICMP6_NI_SUBJ_FQDN:
2299 if (end == (u_char *)(ni + 1)) {
2300 printf(", no subject");
2301 break;
2302 }
2303 printf(", subject=%s", niqcode[ni->ni_code]);
2304 cp = (const u_char *)(ni + 1);
2305 if (dnsdecode(&cp, end, NULL, dnsname,
2306 sizeof(dnsname)) != NULL)
2307 printf("(%s)", dnsname);
2308 else
2309 printf("(invalid)");
2310 break;
2311 case ICMP6_NI_SUBJ_IPV4:
2312 if (l == sizeof(struct in_addr) &&
2313 inet_ntop(AF_INET, ni + 1, ntop_buf,
2314 sizeof(ntop_buf)) != NULL) {
2315 printf(", subject=%s(%s)",
2316 niqcode[ni->ni_code], ntop_buf);
2317 } else
2318 printf(", invalid");
2319 break;
2320 default:
2321 printf(", invalid");
2322 break;
2323 }
2324 }
2325 break;
2326 case ICMP6_NI_REPLY:
2327 printf("Node Information Reply");
2328 /* XXX ID + Seq + Data */
2329 ni = (struct icmp6_nodeinfo *)icp;
2330 printf(", ");
2331 switch (ntohs(ni->ni_qtype)) {
2332 case NI_QTYPE_NOOP:
2333 printf("NOOP");
2334 break;
2335 case NI_QTYPE_SUPTYPES:
2336 printf("Supported qtypes");
2337 break;
2338 case NI_QTYPE_FQDN:
2339 printf("DNS name");
2340 break;
2341 case NI_QTYPE_NODEADDR:
2342 printf("nodeaddr");
2343 break;
2344 case NI_QTYPE_IPV4ADDR:
2345 printf("IPv4 nodeaddr");
2346 break;
2347 default:
2348 printf("unknown qtype");
2349 break;
2350 }
2351 if (options & F_VERBOSE) {
2352 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2353 printf(", invalid");
2354 else
2355 printf(", %s", nircode[ni->ni_code]);
2356 }
2357 break;
2358 default:
2359 printf("Bad ICMP type: %d", icp->icmp6_type);
2360 }
2361 }
2362
2363 /*
2364 * pr_iph --
2365 * Print an IP6 header.
2366 */
2367 void
2368 pr_iph(struct ip6_hdr *ip6)
2369 {
2370 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2371 u_int8_t tc;
2372 char ntop_buf[INET6_ADDRSTRLEN];
2373
2374 tc = *(&ip6->ip6_vfc + 1); /* XXX */
2375 tc = (tc >> 4) & 0x0f;
2376 tc |= (ip6->ip6_vfc << 4);
2377
2378 printf("Vr TC Flow Plen Nxt Hlim\n");
2379 printf(" %1x %02x %05x %04x %02x %02x\n",
2380 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2381 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2382 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2383 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2384 printf("%s->", ntop_buf);
2385 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2386 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2387 printf("%s\n", ntop_buf);
2388 }
2389
2390 /*
2391 * pr_addr --
2392 * Return an ascii host address as a dotted quad and optionally with
2393 * a hostname.
2394 */
2395 const char *
2396 pr_addr(struct sockaddr *addr, int addrlen)
2397 {
2398 static char buf[NI_MAXHOST];
2399 int flag = 0;
2400
2401 if ((options & F_HOSTNAME) == 0)
2402 flag |= NI_NUMERICHOST;
2403
2404 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2405 return (buf);
2406 else
2407 return "?";
2408 }
2409
2410 /*
2411 * pr_retip --
2412 * Dump some info on a returned (via ICMPv6) IPv6 packet.
2413 */
2414 void
2415 pr_retip(struct ip6_hdr *ip6, u_char *end)
2416 {
2417 u_char *cp = (u_char *)ip6, nh;
2418 int hlen;
2419
2420 if (end - (u_char *)ip6 < (int)sizeof(*ip6)) {
2421 printf("IP6");
2422 goto trunc;
2423 }
2424 pr_iph(ip6);
2425 hlen = sizeof(*ip6);
2426
2427 nh = ip6->ip6_nxt;
2428 cp += hlen;
2429 while (end - cp >= 8) {
2430 switch (nh) {
2431 case IPPROTO_HOPOPTS:
2432 printf("HBH ");
2433 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2434 nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2435 break;
2436 case IPPROTO_DSTOPTS:
2437 printf("DSTOPT ");
2438 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2439 nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2440 break;
2441 case IPPROTO_FRAGMENT:
2442 printf("FRAG ");
2443 hlen = sizeof(struct ip6_frag);
2444 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2445 break;
2446 case IPPROTO_ROUTING:
2447 printf("RTHDR ");
2448 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2449 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2450 break;
2451 #ifdef IPSEC
2452 case IPPROTO_AH:
2453 printf("AH ");
2454 hlen = (((struct ah *)cp)->ah_len+2) << 2;
2455 nh = ((struct ah *)cp)->ah_nxt;
2456 break;
2457 #endif
2458 case IPPROTO_ICMPV6:
2459 printf("ICMP6: type = %d, code = %d\n",
2460 *cp, *(cp + 1));
2461 return;
2462 case IPPROTO_ESP:
2463 printf("ESP\n");
2464 return;
2465 case IPPROTO_TCP:
2466 printf("TCP: from port %u, to port %u (decimal)\n",
2467 (*cp * 256 + *(cp + 1)),
2468 (*(cp + 2) * 256 + *(cp + 3)));
2469 return;
2470 case IPPROTO_UDP:
2471 printf("UDP: from port %u, to port %u (decimal)\n",
2472 (*cp * 256 + *(cp + 1)),
2473 (*(cp + 2) * 256 + *(cp + 3)));
2474 return;
2475 default:
2476 printf("Unknown Header(%d)\n", nh);
2477 return;
2478 }
2479
2480 if ((cp += hlen) >= end)
2481 goto trunc;
2482 }
2483 if (end - cp < 8)
2484 goto trunc;
2485
2486 putchar('\n');
2487 return;
2488
2489 trunc:
2490 printf("...\n");
2491 return;
2492 }
2493
2494 void
2495 fill(char *bp, char *patp)
2496 {
2497 int ii, jj, kk;
2498 int pat[16];
2499 char *cp;
2500
2501 for (cp = patp; *cp; cp++)
2502 if (!isxdigit(*cp))
2503 errx(1, "patterns must be specified as hex digits");
2504 ii = sscanf(patp,
2505 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2506 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2507 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2508 &pat[13], &pat[14], &pat[15]);
2509
2510 /* xxx */
2511 if (ii > 0)
2512 for (kk = 0;
2513 kk <= MAXDATALEN - (8 + (int)sizeof(struct tv32) + ii);
2514 kk += ii)
2515 for (jj = 0; jj < ii; ++jj)
2516 bp[jj + kk] = pat[jj];
2517 if (!(options & F_QUIET)) {
2518 printf("PATTERN: 0x");
2519 for (jj = 0; jj < ii; ++jj)
2520 printf("%02x", bp[jj] & 0xFF);
2521 printf("\n");
2522 }
2523 }
2524
2525 #ifdef IPSEC
2526 #ifdef IPSEC_POLICY_IPSEC
2527 int
2528 setpolicy(int so __unused, char *policy)
2529 {
2530 char *buf;
2531
2532 if (policy == NULL)
2533 return 0; /* ignore */
2534
2535 buf = ipsec_set_policy(policy, strlen(policy));
2536 if (buf == NULL)
2537 errx(1, "%s", ipsec_strerror());
2538 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2539 ipsec_get_policylen(buf)) < 0)
2540 warnx("Unable to set IPsec policy");
2541 free(buf);
2542
2543 return 0;
2544 }
2545 #endif
2546 #endif
2547
2548 char *
2549 nigroup(char *name)
2550 {
2551 char *p;
2552 char *q;
2553 MD5_CTX ctxt;
2554 u_int8_t digest[16];
2555 u_int8_t c;
2556 size_t l;
2557 char hbuf[NI_MAXHOST];
2558 struct in6_addr in6;
2559
2560 p = strchr(name, '.');
2561 if (!p)
2562 p = name + strlen(name);
2563 l = p - name;
2564 if (l > 63 || l > sizeof(hbuf) - 1)
2565 return NULL; /*label too long*/
2566 strncpy(hbuf, name, l);
2567 hbuf[(int)l] = '\0';
2568
2569 for (q = name; *q; q++) {
2570 if (isupper(*(unsigned char *)q))
2571 *q = tolower(*(unsigned char *)q);
2572 }
2573
2574 /* generate 8 bytes of pseudo-random value. */
2575 memset(&ctxt, 0, sizeof(ctxt));
2576 MD5Init(&ctxt);
2577 c = l & 0xff;
2578 MD5Update(&ctxt, &c, sizeof(c));
2579 MD5Update(&ctxt, (unsigned char *)name, l);
2580 MD5Final(digest, &ctxt);
2581
2582 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2583 return NULL; /*XXX*/
2584 bcopy(digest, &in6.s6_addr[12], 4);
2585
2586 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2587 return NULL;
2588
2589 return strdup(hbuf);
2590 }
2591
2592 void
2593 usage(void)
2594 {
2595 fprintf(stderr,
2596 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2597 "A"
2598 #endif
2599 "usage: ping6 [-"
2600 "d"
2601 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2602 "E"
2603 #endif
2604 "fH"
2605 #ifdef IPV6_USE_MIN_MTU
2606 "m"
2607 #endif
2608 "nNqtvwW] "
2609 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2610 " [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2611 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2612 " [-P policy]"
2613 #endif
2614 "\n"
2615 " [-p pattern] [-S sourceaddr] [-s packetsize] "
2616 "[hops ...] host\n");
2617 exit(1);
2618 }
DragonFly BSD