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amd64 - Add via variable decls to md_var.h
[dragonfly.git] / sbin / ping6 / ping6.c
blobfcf1c3a73ba62f02cbfd462b4b0e517891fb0498
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 * $DragonFly: src/sbin/ping6/ping6.c,v 1.10 2008/09/04 10:13:10 hasso Exp $
35 */
36
37 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */
38
39 /*
40 * Copyright (c) 1989, 1993
41 * The Regents of the University of California. All rights reserved.
42 *
43 * This code is derived from software contributed to Berkeley by
44 * Mike Muuss.
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. All advertising materials mentioning features or use of this software
55 * must display the following acknowledgement:
56 * This product includes software developed by the University of
57 * California, Berkeley and its contributors.
58 * 4. Neither the name of the University nor the names of its contributors
59 * may be used to endorse or promote products derived from this software
60 * without specific prior written permission.
61 *
62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
72 * SUCH DAMAGE.
73 */
74
75 /*
76 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
77 * measure round-trip-delays and packet loss across network paths.
78 *
79 * Author -
80 * Mike Muuss
81 * U. S. Army Ballistic Research Laboratory
82 * December, 1983
83 *
84 * Status -
85 * Public Domain. Distribution Unlimited.
86 * Bugs -
87 * More statistics could always be gathered.
88 * This program has to run SUID to ROOT to access the ICMP socket.
89 */
90 /*
91 * NOTE:
92 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
93 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link*
94 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of
95 * network attached to 1 or more interfaces)
96 */
97
98 #include <sys/param.h>
99 #include <sys/uio.h>
100 #include <sys/socket.h>
101 #include <sys/time.h>
102
103 #include <net/if.h>
104 #include <net/route.h>
105
106 #include <netinet/in.h>
107 #include <netinet/ip6.h>
108 #include <netinet/icmp6.h>
109 #include <arpa/inet.h>
110 #include <arpa/nameser.h>
111 #include <netdb.h>
112
113 #include <ctype.h>
114 #include <err.h>
115 #include <errno.h>
116 #include <fcntl.h>
117 #include <math.h>
118 #include <signal.h>
119 #include <stdio.h>
120 #include <stdlib.h>
121 #include <string.h>
122 #include <unistd.h>
123 #ifdef HAVE_POLL_H
124 #include <poll.h>
125 #endif
126
127 #ifdef IPSEC
128 #include <netinet6/ah.h>
129 #include <netinet6/ipsec.h>
130 #endif
131
132 #include <md5.h>
133
134 struct tv32 {
135 u_int32_t tv32_sec;
136 u_int32_t tv32_usec;
137 };
138
139 #define MAXPACKETLEN 131072
140 #define IP6LEN 40
141 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */
142 #define ICMP6ECHOTMLEN sizeof(struct tv32)
143 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8)
144 #define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */
145 /* FQDN case, 64 bits of nonce + 32 bits ttl */
146 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12)
147 #define EXTRA 256 /* for AH and various other headers. weird. */
148 #define DEFDATALEN ICMP6ECHOTMLEN
149 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
150 #define NROUTES 9 /* number of record route slots */
151
152 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
153 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
154 #define SET(bit) (A(bit) |= B(bit))
155 #define CLR(bit) (A(bit) &= (~B(bit)))
156 #define TST(bit) (A(bit) & B(bit))
157
158 #define F_FLOOD 0x0001
159 #define F_INTERVAL 0x0002
160 #define F_PINGFILLED 0x0008
161 #define F_QUIET 0x0010
162 #define F_RROUTE 0x0020
163 #define F_SO_DEBUG 0x0040
164 #define F_VERBOSE 0x0100
165 #ifdef IPSEC
166 #ifdef IPSEC_POLICY_IPSEC
167 #define F_POLICY 0x0400
168 #else
169 #define F_AUTHHDR 0x0200
170 #define F_ENCRYPT 0x0400
171 #endif /*IPSEC_POLICY_IPSEC*/
172 #endif /*IPSEC*/
173 #define F_NODEADDR 0x0800
174 #define F_FQDN 0x1000
175 #define F_INTERFACE 0x2000
176 #define F_SRCADDR 0x4000
177 #define F_HOSTNAME 0x10000
178 #define F_FQDNOLD 0x20000
179 #define F_NIGROUP 0x40000
180 #define F_SUPTYPES 0x80000
181 #define F_NOMINMTU 0x100000
182 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
183 u_int options;
184
185 #define IN6LEN sizeof(struct in6_addr)
186 #define SA6LEN sizeof(struct sockaddr_in6)
187 #define DUMMY_PORT 10101
188
189 #define SIN6(s) ((struct sockaddr_in6 *)(s))
190
191 /*
192 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
193 * number of received sequence numbers we can keep track of. Change 128
194 * to 8192 for complete accuracy...
195 */
196 #define MAX_DUP_CHK (8 * 8192)
197 int mx_dup_ck = MAX_DUP_CHK;
198 char rcvd_tbl[MAX_DUP_CHK / 8];
199
200 struct addrinfo *res;
201 struct sockaddr_in6 dst; /* who to ping6 */
202 struct sockaddr_in6 src; /* src addr of this packet */
203 socklen_t srclen;
204 int datalen = DEFDATALEN;
205 int s; /* socket file descriptor */
206 u_char outpack[MAXPACKETLEN];
207 char BSPACE = '\b'; /* characters written for flood */
208 char DOT = '.';
209 char *hostname;
210 int ident; /* process id to identify our packets */
211 u_int8_t nonce[8]; /* nonce field for node information */
212 int hoplimit = -1; /* hoplimit */
213 int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */
214
215 /* counters */
216 long npackets; /* max packets to transmit */
217 long nreceived; /* # of packets we got back */
218 long nrepeats; /* number of duplicates */
219 long ntransmitted; /* sequence # for outbound packets = #sent */
220 struct timeval interval = {1, 0}; /* interval between packets */
221
222 /* timing */
223 int timing; /* flag to do timing */
224 double tmin = 999999999.0; /* minimum round trip time */
225 double tmax = 0.0; /* maximum round trip time */
226 double tsum = 0.0; /* sum of all times, for doing average */
227 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
228
229 /* for node addresses */
230 u_short naflags;
231
232 /* for ancillary data(advanced API) */
233 struct msghdr smsghdr;
234 struct iovec smsgiov;
235 char *scmsg = 0;
236
237 volatile sig_atomic_t seenalrm;
238 volatile sig_atomic_t seenint;
239 #ifdef SIGINFO
240 volatile sig_atomic_t seeninfo;
241 #endif
242
243 int main(int, char *[]);
244 void fill(char *, char *);
245 int get_hoplim(struct msghdr *);
246 #ifdef IPV6_RECVPATHMTU
247 int get_pathmtu(struct msghdr *);
248 #else
249 #define get_pathmtu(mhdr) (0)
250 #endif
251 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
252 void onsignal(int);
253 void retransmit(void);
254 void onint(int);
255 size_t pingerlen(void);
256 int pinger(void);
257 const char *pr_addr(struct sockaddr *, int);
258 void pr_icmph(struct icmp6_hdr *, u_char *);
259 void pr_iph(struct ip6_hdr *);
260 void pr_suptypes(struct icmp6_nodeinfo *, size_t);
261 void pr_nodeaddr(struct icmp6_nodeinfo *, int);
262 int myechoreply(const struct icmp6_hdr *);
263 int mynireply(const struct icmp6_nodeinfo *);
264 char *dnsdecode(const u_char **, const u_char *, const u_char *,
265 char *, size_t);
266 void pr_pack(u_char *, int, struct msghdr *);
267 void pr_exthdrs(struct msghdr *);
268 void pr_ip6opt(void *, size_t);
269 void pr_rthdr(void *, size_t);
270 int pr_bitrange(u_int32_t, int, int);
271 void pr_retip(struct ip6_hdr *, u_char *);
272 void summary(void);
273 void tvsub(struct timeval *, struct timeval *);
274 int setpolicy(int, char *);
275 char *nigroup(char *);
276 void usage(void);
277
278 int
279 main(int argc, char **argv)
280 {
281 struct itimerval itimer;
282 struct sockaddr_in6 from;
283 #ifndef HAVE_ARC4RANDOM
284 struct timeval seed;
285 #endif
286 #ifdef HAVE_POLL_H
287 int timeout;
288 #else
289 struct timeval timeout, *tv;
290 #endif
291 struct addrinfo hints;
292 #ifdef HAVE_POLL_H
293 struct pollfd fdmaskp[1];
294 #else
295 fd_set *fdmaskp;
296 int fdmasks;
297 #endif
298 int cc, i;
299 int ch, hold, packlen, preload, optval, ret_ga;
300 u_char *datap, *packet;
301 char *e, *target, *ifname = NULL, *gateway = NULL;
302 int ip6optlen = 0;
303 struct cmsghdr *scmsgp = NULL;
304 struct cmsghdr *cm;
305 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
306 u_long lsockbufsize;
307 int sockbufsize = 0;
308 #endif
309 int usepktinfo = 0;
310 struct in6_pktinfo *pktinfo = NULL;
311 #ifdef USE_RFC3542
312 struct ip6_rthdr *rthdr = NULL;
313 #endif
314 #ifdef IPSEC_POLICY_IPSEC
315 char *policy_in = NULL;
316 char *policy_out = NULL;
317 #endif
318 #ifdef IPV6_USE_MIN_MTU
319 int mflag = 0;
320 #endif
321 double intval;
322
323 /* just to be sure */
324 memset(&smsghdr, 0, sizeof(smsghdr));
325 memset(&smsgiov, 0, sizeof(smsgiov));
326
327 preload = 0;
328 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
329 #ifndef IPSEC
330 #define ADDOPTS
331 #else
332 #ifdef IPSEC_POLICY_IPSEC
333 #define ADDOPTS "P:"
334 #else
335 #define ADDOPTS "AE"
336 #endif /*IPSEC_POLICY_IPSEC*/
337 #endif
338 while ((ch = getopt(argc, argv,
339 "a:b:c:dfHg:h:I:i:l:mnNp:qS:s:tvwW" ADDOPTS)) != -1) {
340 #undef ADDOPTS
341 switch (ch) {
342 case 'a':
343 {
344 char *cp;
345
346 options &= ~F_NOUSERDATA;
347 options |= F_NODEADDR;
348 for (cp = optarg; *cp != '\0'; cp++) {
349 switch (*cp) {
350 case 'a':
351 naflags |= NI_NODEADDR_FLAG_ALL;
352 break;
353 case 'c':
354 case 'C':
355 naflags |= NI_NODEADDR_FLAG_COMPAT;
356 break;
357 case 'l':
358 case 'L':
359 naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
360 break;
361 case 's':
362 case 'S':
363 naflags |= NI_NODEADDR_FLAG_SITELOCAL;
364 break;
365 case 'g':
366 case 'G':
367 naflags |= NI_NODEADDR_FLAG_GLOBAL;
368 break;
369 case 'A': /* experimental. not in the spec */
370 #ifdef NI_NODEADDR_FLAG_ANYCAST
371 naflags |= NI_NODEADDR_FLAG_ANYCAST;
372 break;
373 #else
374 errx(1,
375 "-a A is not supported on the platform");
376 /*NOTREACHED*/
377 #endif
378 default:
379 usage();
380 /*NOTREACHED*/
381 }
382 }
383 break;
384 }
385 case 'b':
386 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
387 errno = 0;
388 e = NULL;
389 lsockbufsize = strtoul(optarg, &e, 10);
390 sockbufsize = lsockbufsize;
391 if (errno || !*optarg || *e ||
392 sockbufsize != (long)lsockbufsize)
393 errx(1, "invalid socket buffer size");
394 #else
395 errx(1,
396 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
397 #endif
398 break;
399 case 'c':
400 npackets = strtol(optarg, &e, 10);
401 if (npackets <= 0 || *optarg == '\0' || *e != '\0')
402 errx(1,
403 "illegal number of packets -- %s", optarg);
404 break;
405 case 'd':
406 options |= F_SO_DEBUG;
407 break;
408 case 'f':
409 if (getuid()) {
410 errno = EPERM;
411 errx(1, "Must be superuser to flood ping");
412 }
413 options |= F_FLOOD;
414 setbuf(stdout, NULL);
415 break;
416 case 'g':
417 gateway = optarg;
418 break;
419 case 'H':
420 options |= F_HOSTNAME;
421 break;
422 case 'h': /* hoplimit */
423 hoplimit = strtol(optarg, &e, 10);
424 if (*optarg == '\0' || *e != '\0')
425 errx(1, "illegal hoplimit %s", optarg);
426 if (255 < hoplimit || hoplimit < -1)
427 errx(1,
428 "illegal hoplimit -- %s", optarg);
429 break;
430 case 'I':
431 ifname = optarg;
432 options |= F_INTERFACE;
433 #ifndef USE_SIN6_SCOPE_ID
434 usepktinfo++;
435 #endif
436 break;
437 case 'i': /* wait between sending packets */
438 intval = strtod(optarg, &e);
439 if (*optarg == '\0' || *e != '\0')
440 errx(1, "illegal timing interval %s", optarg);
441 if (intval < 1 && getuid()) {
442 errx(1, "%s: only root may use interval < 1s",
443 strerror(EPERM));
444 }
445 interval.tv_sec = (long)intval;
446 interval.tv_usec =
447 (long)((intval - interval.tv_sec) * 1000000);
448 if (interval.tv_sec < 0)
449 errx(1, "illegal timing interval %s", optarg);
450 /* less than 1/hz does not make sense */
451 if (interval.tv_sec == 0 && interval.tv_usec < 10000) {
452 warnx("too small interval, raised to 0.01");
453 interval.tv_usec = 10000;
454 }
455 options |= F_INTERVAL;
456 break;
457 case 'l':
458 if (getuid()) {
459 errno = EPERM;
460 errx(1, "Must be superuser to preload");
461 }
462 preload = strtol(optarg, &e, 10);
463 if (preload < 0 || *optarg == '\0' || *e != '\0')
464 errx(1, "illegal preload value -- %s", optarg);
465 break;
466 case 'm':
467 #ifdef IPV6_USE_MIN_MTU
468 mflag++;
469 break;
470 #else
471 errx(1, "-%c is not supported on this platform", ch);
472 /*NOTREACHED*/
473 #endif
474 case 'n':
475 options &= ~F_HOSTNAME;
476 break;
477 case 'N':
478 options |= F_NIGROUP;
479 break;
480 case 'p': /* fill buffer with user pattern */
481 options |= F_PINGFILLED;
482 fill((char *)datap, optarg);
483 break;
484 case 'q':
485 options |= F_QUIET;
486 break;
487 case 'S':
488 memset(&hints, 0, sizeof(struct addrinfo));
489 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
490 hints.ai_family = AF_INET6;
491 hints.ai_socktype = SOCK_RAW;
492 hints.ai_protocol = IPPROTO_ICMPV6;
493
494 ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
495 if (ret_ga) {
496 errx(1, "invalid source address: %s",
497 gai_strerror(ret_ga));
498 }
499 /*
500 * res->ai_family must be AF_INET6 and res->ai_addrlen
501 * must be sizeof(src).
502 */
503 memcpy(&src, res->ai_addr, res->ai_addrlen);
504 srclen = res->ai_addrlen;
505 freeaddrinfo(res);
506 options |= F_SRCADDR;
507 break;
508 case 's': /* size of packet to send */
509 datalen = strtol(optarg, &e, 10);
510 if (datalen <= 0 || *optarg == '\0' || *e != '\0')
511 errx(1, "illegal datalen value -- %s", optarg);
512 if (datalen > MAXDATALEN) {
513 errx(1,
514 "datalen value too large, maximum is %d",
515 MAXDATALEN);
516 }
517 break;
518 case 't':
519 options &= ~F_NOUSERDATA;
520 options |= F_SUPTYPES;
521 break;
522 case 'v':
523 options |= F_VERBOSE;
524 break;
525 case 'w':
526 options &= ~F_NOUSERDATA;
527 options |= F_FQDN;
528 break;
529 case 'W':
530 options &= ~F_NOUSERDATA;
531 options |= F_FQDNOLD;
532 break;
533 #ifdef IPSEC
534 #ifdef IPSEC_POLICY_IPSEC
535 case 'P':
536 options |= F_POLICY;
537 if (!strncmp("in", optarg, 2)) {
538 if ((policy_in = strdup(optarg)) == NULL)
539 errx(1, "strdup");
540 } else if (!strncmp("out", optarg, 3)) {
541 if ((policy_out = strdup(optarg)) == NULL)
542 errx(1, "strdup");
543 } else
544 errx(1, "invalid security policy");
545 break;
546 #else
547 case 'A':
548 options |= F_AUTHHDR;
549 break;
550 case 'E':
551 options |= F_ENCRYPT;
552 break;
553 #endif /*IPSEC_POLICY_IPSEC*/
554 #endif /*IPSEC*/
555 default:
556 usage();
557 /*NOTREACHED*/
558 }
559 }
560
561 argc -= optind;
562 argv += optind;
563
564 if (argc < 1) {
565 usage();
566 /*NOTREACHED*/
567 }
568 if (argc > 1) {
569 errx(1, "too many arguments");
570 /*NOTREACHED*/
571 }
572
573 if (options & F_NIGROUP) {
574 target = nigroup(argv[argc - 1]);
575 if (target == NULL) {
576 usage();
577 /*NOTREACHED*/
578 }
579 } else
580 target = argv[argc - 1];
581
582 /* getaddrinfo */
583 memset(&hints, 0, sizeof(struct addrinfo));
584 hints.ai_flags = AI_CANONNAME;
585 hints.ai_family = AF_INET6;
586 hints.ai_socktype = SOCK_RAW;
587 hints.ai_protocol = IPPROTO_ICMPV6;
588
589 ret_ga = getaddrinfo(target, NULL, &hints, &res);
590 if (ret_ga)
591 errx(1, "%s", gai_strerror(ret_ga));
592 if (res->ai_canonname)
593 hostname = res->ai_canonname;
594 else
595 hostname = target;
596
597 if (!res->ai_addr)
598 errx(1, "getaddrinfo failed");
599
600 memcpy(&dst, res->ai_addr, res->ai_addrlen);
601
602 if ((s = socket(res->ai_family, res->ai_socktype,
603 res->ai_protocol)) < 0)
604 err(1, "socket");
605
606 /* set the source address if specified. */
607 if ((options & F_SRCADDR) &&
608 bind(s, (struct sockaddr *)&src, srclen) != 0) {
609 err(1, "bind");
610 }
611
612 /* set the gateway (next hop) if specified */
613 if (gateway) {
614 struct addrinfo ghints, *gres;
615 int error;
616
617 memset(&ghints, 0, sizeof(ghints));
618 ghints.ai_family = AF_INET6;
619 ghints.ai_socktype = SOCK_RAW;
620 ghints.ai_protocol = IPPROTO_ICMPV6;
621
622 error = getaddrinfo(gateway, NULL, &hints, &gres);
623 if (error) {
624 errx(1, "getaddrinfo for the gateway %s: %s",
625 gateway, gai_strerror(error));
626 }
627 if (gres->ai_next && (options & F_VERBOSE))
628 warnx("gateway resolves to multiple addresses");
629
630 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
631 gres->ai_addr, gres->ai_addrlen)) {
632 err(1, "setsockopt(IPV6_NEXTHOP)");
633 }
634
635 freeaddrinfo(gres);
636 }
637
638 /*
639 * let the kerel pass extension headers of incoming packets,
640 * for privileged socket options
641 */
642 if ((options & F_VERBOSE) != 0) {
643 int opton = 1;
644
645 #ifdef IPV6_RECVHOPOPTS
646 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
647 sizeof(opton)))
648 err(1, "setsockopt(IPV6_RECVHOPOPTS)");
649 #else /* old adv. API */
650 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
651 sizeof(opton)))
652 err(1, "setsockopt(IPV6_HOPOPTS)");
653 #endif
654 #ifdef IPV6_RECVDSTOPTS
655 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
656 sizeof(opton)))
657 err(1, "setsockopt(IPV6_RECVDSTOPTS)");
658 #else /* old adv. API */
659 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
660 sizeof(opton)))
661 err(1, "setsockopt(IPV6_DSTOPTS)");
662 #endif
663 #ifdef IPV6_RECVRTHDRDSTOPTS
664 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
665 sizeof(opton)))
666 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
667 #endif
668 }
669
670 /* revoke root privilege */
671 seteuid(getuid());
672 setuid(getuid());
673
674 if ((options & F_FLOOD) && (options & F_INTERVAL))
675 errx(1, "-f and -i incompatible options");
676
677 if ((options & F_NOUSERDATA) == 0) {
678 if (datalen >= (int)sizeof(struct tv32)) {
679 /* we can time transfer */
680 timing = 1;
681 } else
682 timing = 0;
683 /* in F_VERBOSE case, we may get non-echoreply packets*/
684 if (options & F_VERBOSE)
685 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
686 else
687 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
688 } else {
689 /* suppress timing for node information query */
690 timing = 0;
691 datalen = 2048;
692 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
693 }
694
695 if (!(packet = (u_char *)malloc((u_int)packlen)))
696 err(1, "Unable to allocate packet");
697 if (!(options & F_PINGFILLED))
698 for (i = ICMP6ECHOLEN; i < packlen; ++i)
699 *datap++ = i;
700
701 ident = getpid() & 0xFFFF;
702 #ifndef HAVE_ARC4RANDOM
703 gettimeofday(&seed, NULL);
704 srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
705 memset(nonce, 0, sizeof(nonce));
706 for (i = 0; i < (int)sizeof(nonce); i += sizeof(int))
707 *((int *)&nonce[i]) = rand();
708 #else
709 memset(nonce, 0, sizeof(nonce));
710 for (i = 0; i < (int)sizeof(nonce); i += sizeof(u_int32_t))
711 *((u_int32_t *)&nonce[i]) = arc4random();
712 #endif
713
714 hold = 1;
715
716 if (options & F_SO_DEBUG)
717 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
718 sizeof(hold));
719 optval = IPV6_DEFHLIM;
720 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
721 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
722 &optval, sizeof(optval)) == -1)
723 err(1, "IPV6_MULTICAST_HOPS");
724 #ifdef IPV6_USE_MIN_MTU
725 if (mflag != 1) {
726 optval = mflag > 1 ? 0 : 1;
727 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
728 &optval, sizeof(optval)) == -1)
729 err(1, "setsockopt(IPV6_USE_MIN_MTU)");
730 }
731 #ifdef IPV6_RECVPATHMTU
732 else {
733 optval = 1;
734 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
735 &optval, sizeof(optval)) == -1)
736 err(1, "setsockopt(IPV6_RECVPATHMTU)");
737 }
738 #endif /* IPV6_RECVPATHMTU */
739 #endif /* IPV6_USE_MIN_MTU */
740
741 #ifdef IPSEC
742 #ifdef IPSEC_POLICY_IPSEC
743 if (options & F_POLICY) {
744 if (setpolicy(s, policy_in) < 0)
745 errx(1, "%s", ipsec_strerror());
746 if (setpolicy(s, policy_out) < 0)
747 errx(1, "%s", ipsec_strerror());
748 }
749 #else
750 if (options & F_AUTHHDR) {
751 optval = IPSEC_LEVEL_REQUIRE;
752 #ifdef IPV6_AUTH_TRANS_LEVEL
753 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
754 &optval, sizeof(optval)) == -1)
755 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
756 #else /* old def */
757 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
758 &optval, sizeof(optval)) == -1)
759 err(1, "setsockopt(IPV6_AUTH_LEVEL)");
760 #endif
761 }
762 if (options & F_ENCRYPT) {
763 optval = IPSEC_LEVEL_REQUIRE;
764 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
765 &optval, sizeof(optval)) == -1)
766 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
767 }
768 #endif /*IPSEC_POLICY_IPSEC*/
769 #endif
770
771 #ifdef ICMP6_FILTER
772 {
773 struct icmp6_filter filt;
774 if (!(options & F_VERBOSE)) {
775 ICMP6_FILTER_SETBLOCKALL(&filt);
776 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
777 (options & F_NODEADDR) || (options & F_SUPTYPES))
778 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
779 else
780 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
781 } else {
782 ICMP6_FILTER_SETPASSALL(&filt);
783 }
784 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
785 sizeof(filt)) < 0)
786 err(1, "setsockopt(ICMP6_FILTER)");
787 }
788 #endif /*ICMP6_FILTER*/
789
790 /* let the kerel pass extension headers of incoming packets */
791 if ((options & F_VERBOSE) != 0) {
792 int opton = 1;
793
794 #ifdef IPV6_RECVRTHDR
795 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
796 sizeof(opton)))
797 err(1, "setsockopt(IPV6_RECVRTHDR)");
798 #else /* old adv. API */
799 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
800 sizeof(opton)))
801 err(1, "setsockopt(IPV6_RTHDR)");
802 #endif
803 }
804
805 /*
806 optval = 1;
807 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
808 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
809 &optval, sizeof(optval)) == -1)
810 err(1, "IPV6_MULTICAST_LOOP");
811 */
812
813 /* Specify the outgoing interface and/or the source address */
814 if (usepktinfo)
815 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
816
817 if (hoplimit != -1)
818 ip6optlen += CMSG_SPACE(sizeof(int));
819
820 /* set IP6 packet options */
821 if (ip6optlen) {
822 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
823 errx(1, "can't allocate enough memory");
824 smsghdr.msg_control = (caddr_t)scmsg;
825 smsghdr.msg_controllen = ip6optlen;
826 scmsgp = (struct cmsghdr *)scmsg;
827 }
828 if (usepktinfo) {
829 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
830 memset(pktinfo, 0, sizeof(*pktinfo));
831 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
832 scmsgp->cmsg_level = IPPROTO_IPV6;
833 scmsgp->cmsg_type = IPV6_PKTINFO;
834 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
835 }
836
837 /* set the outgoing interface */
838 if (ifname) {
839 #ifndef USE_SIN6_SCOPE_ID
840 /* pktinfo must have already been allocated */
841 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
842 errx(1, "%s: invalid interface name", ifname);
843 #else
844 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
845 errx(1, "%s: invalid interface name", ifname);
846 #endif
847 }
848 if (hoplimit != -1) {
849 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
850 scmsgp->cmsg_level = IPPROTO_IPV6;
851 scmsgp->cmsg_type = IPV6_HOPLIMIT;
852 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
853
854 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
855 }
856
857 if (!(options & F_SRCADDR)) {
858 /*
859 * get the source address. XXX since we revoked the root
860 * privilege, we cannot use a raw socket for this.
861 */
862 int dummy;
863 socklen_t len = sizeof(src);
864
865 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
866 err(1, "UDP socket");
867
868 src.sin6_family = AF_INET6;
869 src.sin6_addr = dst.sin6_addr;
870 src.sin6_port = ntohs(DUMMY_PORT);
871 src.sin6_scope_id = dst.sin6_scope_id;
872
873 #ifdef USE_RFC3542
874 if (pktinfo &&
875 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
876 (void *)pktinfo, sizeof(*pktinfo)))
877 err(1, "UDP setsockopt(IPV6_PKTINFO)");
878 if (hoplimit != -1 &&
879 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
880 (void *)&hoplimit, sizeof(hoplimit)))
881 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
882 if (hoplimit != -1 &&
883 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
884 (void *)&hoplimit, sizeof(hoplimit)))
885 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
886 if (rthdr &&
887 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
888 (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
889 err(1, "UDP setsockopt(IPV6_RTHDR)");
890 #else /* old advanced API */
891 if (smsghdr.msg_control &&
892 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
893 (void *)smsghdr.msg_control, smsghdr.msg_controllen))
894 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
895 #endif
896
897 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
898 err(1, "UDP connect");
899
900 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
901 err(1, "getsockname");
902
903 close(dummy);
904 }
905
906 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
907 if (sockbufsize) {
908 if (datalen > sockbufsize)
909 warnx("you need -b to increase socket buffer size");
910 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
911 sizeof(sockbufsize)) < 0)
912 err(1, "setsockopt(SO_SNDBUF)");
913 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
914 sizeof(sockbufsize)) < 0)
915 err(1, "setsockopt(SO_RCVBUF)");
916 }
917 else {
918 if (datalen > 8 * 1024) /*XXX*/
919 warnx("you need -b to increase socket buffer size");
920 /*
921 * When pinging the broadcast address, you can get a lot of
922 * answers. Doing something so evil is useful if you are trying
923 * to stress the ethernet, or just want to fill the arp cache
924 * to get some stuff for /etc/ethers.
925 */
926 hold = 48 * 1024;
927 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
928 sizeof(hold));
929 }
930 #endif
931
932 optval = 1;
933 #ifndef USE_SIN6_SCOPE_ID
934 #ifdef IPV6_RECVPKTINFO
935 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
936 sizeof(optval)) < 0)
937 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
938 #else /* old adv. API */
939 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
940 sizeof(optval)) < 0)
941 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
942 #endif
943 #endif /* USE_SIN6_SCOPE_ID */
944 #ifdef IPV6_RECVHOPLIMIT
945 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
946 sizeof(optval)) < 0)
947 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
948 #else /* old adv. API */
949 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
950 sizeof(optval)) < 0)
951 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
952 #endif
953
954 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
955 (unsigned long)(pingerlen() - 8));
956 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
957 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
958
959 while (preload--) /* Fire off them quickies. */
960 pinger();
961
962 signal(SIGINT, onsignal);
963 #ifdef SIGINFO
964 signal(SIGINFO, onsignal);
965 #endif
966
967 if ((options & F_FLOOD) == 0) {
968 signal(SIGALRM, onsignal);
969 itimer.it_interval = interval;
970 itimer.it_value = interval;
971 setitimer(ITIMER_REAL, &itimer, NULL);
972 if (ntransmitted == 0)
973 retransmit();
974 }
975
976 #ifndef HAVE_POLL_H
977 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
978 if ((fdmaskp = malloc(fdmasks)) == NULL)
979 err(1, "malloc");
980 #endif
981
982 seenalrm = seenint = 0;
983 #ifdef SIGINFO
984 seeninfo = 0;
985 #endif
986
987 /* For control (ancillary) data received from recvmsg() */
988 cm = (struct cmsghdr *)malloc(CONTROLLEN);
989 if (cm == NULL)
990 err(1, "malloc");
991
992 for (;;) {
993 struct msghdr m;
994 struct iovec iov[2];
995
996 /* signal handling */
997 if (seenalrm) {
998 retransmit();
999 seenalrm = 0;
1000 continue;
1001 }
1002 if (seenint) {
1003 onint(SIGINT);
1004 seenint = 0;
1005 continue;
1006 }
1007 #ifdef SIGINFO
1008 if (seeninfo) {
1009 summary();
1010 seeninfo = 0;
1011 continue;
1012 }
1013 #endif
1014
1015 if (options & F_FLOOD) {
1016 pinger();
1017 #ifdef HAVE_POLL_H
1018 timeout = 10;
1019 #else
1020 timeout.tv_sec = 0;
1021 timeout.tv_usec = 10000;
1022 tv = &timeout;
1023 #endif
1024 } else {
1025 #ifdef HAVE_POLL_H
1026 timeout = INFTIM;
1027 #else
1028 tv = NULL;
1029 #endif
1030 }
1031 #ifdef HAVE_POLL_H
1032 fdmaskp[0].fd = s;
1033 fdmaskp[0].events = POLLIN;
1034 cc = poll(fdmaskp, 1, timeout);
1035 #else
1036 memset(fdmaskp, 0, fdmasks);
1037 FD_SET(s, fdmaskp);
1038 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1039 #endif
1040 if (cc < 0) {
1041 if (errno != EINTR) {
1042 #ifdef HAVE_POLL_H
1043 warn("poll");
1044 #else
1045 warn("select");
1046 #endif
1047 sleep(1);
1048 }
1049 continue;
1050 } else if (cc == 0)
1051 continue;
1052
1053 m.msg_name = (caddr_t)&from;
1054 m.msg_namelen = sizeof(from);
1055 memset(&iov, 0, sizeof(iov));
1056 iov[0].iov_base = (caddr_t)packet;
1057 iov[0].iov_len = packlen;
1058 m.msg_iov = iov;
1059 m.msg_iovlen = 1;
1060 memset(cm, 0, CONTROLLEN);
1061 m.msg_control = (void *)cm;
1062 m.msg_controllen = CONTROLLEN;
1063
1064 cc = recvmsg(s, &m, 0);
1065 if (cc < 0) {
1066 if (errno != EINTR) {
1067 warn("recvmsg");
1068 sleep(1);
1069 }
1070 continue;
1071 } else if (cc == 0) {
1072 int mtu;
1073
1074 /*
1075 * receive control messages only. Process the
1076 * exceptions (currently the only possiblity is
1077 * a path MTU notification.)
1078 */
1079 if ((mtu = get_pathmtu(&m)) > 0) {
1080 if ((options & F_VERBOSE) != 0) {
1081 printf("new path MTU (%d) is "
1082 "notified\n", mtu);
1083 }
1084 }
1085 continue;
1086 } else {
1087 /*
1088 * an ICMPv6 message (probably an echoreply) arrived.
1089 */
1090 pr_pack(packet, cc, &m);
1091 }
1092 if (npackets && nreceived >= npackets)
1093 break;
1094 }
1095 summary();
1096 exit(nreceived == 0);
1097 }
1098
1099 void
1100 onsignal(int sig)
1101 {
1102 switch (sig) {
1103 case SIGALRM:
1104 seenalrm++;
1105 break;
1106 case SIGINT:
1107 seenint++;
1108 break;
1109 #ifdef SIGINFO
1110 case SIGINFO:
1111 seeninfo++;
1112 break;
1113 #endif
1114 }
1115 }
1116
1117 /*
1118 * retransmit --
1119 * This routine transmits another ping6.
1120 */
1121 void
1122 retransmit(void)
1123 {
1124 struct itimerval itimer;
1125
1126 if (pinger() == 0)
1127 return;
1128
1129 /*
1130 * If we're not transmitting any more packets, change the timer
1131 * to wait two round-trip times if we've received any packets or
1132 * ten seconds if we haven't.
1133 */
1134 #define MAXWAIT 10
1135 if (nreceived) {
1136 itimer.it_value.tv_sec = 2 * tmax / 1000;
1137 if (itimer.it_value.tv_sec == 0)
1138 itimer.it_value.tv_sec = 1;
1139 } else
1140 itimer.it_value.tv_sec = MAXWAIT;
1141 itimer.it_interval.tv_sec = 0;
1142 itimer.it_interval.tv_usec = 0;
1143 itimer.it_value.tv_usec = 0;
1144
1145 signal(SIGALRM, onint);
1146 setitimer(ITIMER_REAL, &itimer, NULL);
1147 }
1148
1149 /*
1150 * pinger --
1151 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1152 * will be added on by the kernel. The ID field is our UNIX process ID,
1153 * and the sequence number is an ascending integer. The first 8 bytes
1154 * of the data portion are used to hold a UNIX "timeval" struct in VAX
1155 * byte-order, to compute the round-trip time.
1156 */
1157 size_t
1158 pingerlen(void)
1159 {
1160 size_t l;
1161
1162 if (options & F_FQDN)
1163 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1164 else if (options & F_FQDNOLD)
1165 l = ICMP6_NIQLEN;
1166 else if (options & F_NODEADDR)
1167 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1168 else if (options & F_SUPTYPES)
1169 l = ICMP6_NIQLEN;
1170 else
1171 l = ICMP6ECHOLEN + datalen;
1172
1173 return l;
1174 }
1175
1176 int
1177 pinger(void)
1178 {
1179 struct icmp6_hdr *icp;
1180 struct iovec iov[2];
1181 int i, cc;
1182 struct icmp6_nodeinfo *nip;
1183 int seq;
1184
1185 if (npackets && ntransmitted >= npackets)
1186 return(-1); /* no more transmission */
1187
1188 icp = (struct icmp6_hdr *)outpack;
1189 nip = (struct icmp6_nodeinfo *)outpack;
1190 memset(icp, 0, sizeof(*icp));
1191 icp->icmp6_cksum = 0;
1192 seq = ntransmitted++;
1193 CLR(seq % mx_dup_ck);
1194
1195 if (options & F_FQDN) {
1196 icp->icmp6_type = ICMP6_NI_QUERY;
1197 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1198 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1199 nip->ni_flags = htons(0);
1200
1201 memcpy(nip->icmp6_ni_nonce, nonce,
1202 sizeof(nip->icmp6_ni_nonce));
1203 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1204
1205 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1206 sizeof(dst.sin6_addr));
1207 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1208 datalen = 0;
1209 } else if (options & F_FQDNOLD) {
1210 /* packet format in 03 draft - no Subject data on queries */
1211 icp->icmp6_type = ICMP6_NI_QUERY;
1212 icp->icmp6_code = 0; /* code field is always 0 */
1213 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1214 nip->ni_flags = htons(0);
1215
1216 memcpy(nip->icmp6_ni_nonce, nonce,
1217 sizeof(nip->icmp6_ni_nonce));
1218 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1219
1220 cc = ICMP6_NIQLEN;
1221 datalen = 0;
1222 } else if (options & F_NODEADDR) {
1223 icp->icmp6_type = ICMP6_NI_QUERY;
1224 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1225 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1226 nip->ni_flags = naflags;
1227
1228 memcpy(nip->icmp6_ni_nonce, nonce,
1229 sizeof(nip->icmp6_ni_nonce));
1230 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1231
1232 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1233 sizeof(dst.sin6_addr));
1234 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1235 datalen = 0;
1236 } else if (options & F_SUPTYPES) {
1237 icp->icmp6_type = ICMP6_NI_QUERY;
1238 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/
1239 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1240 /* we support compressed bitmap */
1241 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1242
1243 memcpy(nip->icmp6_ni_nonce, nonce,
1244 sizeof(nip->icmp6_ni_nonce));
1245 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1246 cc = ICMP6_NIQLEN;
1247 datalen = 0;
1248 } else {
1249 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1250 icp->icmp6_code = 0;
1251 icp->icmp6_id = htons(ident);
1252 icp->icmp6_seq = ntohs(seq);
1253 if (timing) {
1254 struct timeval tv;
1255 struct tv32 *tv32;
1256 gettimeofday(&tv, NULL);
1257 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1258 tv32->tv32_sec = htonl(tv.tv_sec);
1259 tv32->tv32_usec = htonl(tv.tv_usec);
1260 }
1261 cc = ICMP6ECHOLEN + datalen;
1262 }
1263
1264 #ifdef DIAGNOSTIC
1265 if (pingerlen() != cc)
1266 errx(1, "internal error; length mismatch");
1267 #endif
1268
1269 smsghdr.msg_name = (caddr_t)&dst;
1270 smsghdr.msg_namelen = sizeof(dst);
1271 memset(&iov, 0, sizeof(iov));
1272 iov[0].iov_base = (caddr_t)outpack;
1273 iov[0].iov_len = cc;
1274 smsghdr.msg_iov = iov;
1275 smsghdr.msg_iovlen = 1;
1276
1277 i = sendmsg(s, &smsghdr, 0);
1278
1279 if (i < 0 || i != cc) {
1280 if (i < 0)
1281 warn("sendmsg");
1282 printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i);
1283 }
1284 if (!(options & F_QUIET) && options & F_FLOOD)
1285 write(STDOUT_FILENO, &DOT, 1);
1286
1287 return(0);
1288 }
1289
1290 int
1291 myechoreply(const struct icmp6_hdr *icp)
1292 {
1293 if (ntohs(icp->icmp6_id) == ident)
1294 return 1;
1295 else
1296 return 0;
1297 }
1298
1299 int
1300 mynireply(const struct icmp6_nodeinfo *nip)
1301 {
1302 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1303 nonce + sizeof(u_int16_t),
1304 sizeof(nonce) - sizeof(u_int16_t)) == 0)
1305 return 1;
1306 else
1307 return 0;
1308 }
1309
1310 char *
1311 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1312 size_t bufsiz)
1313 {
1314 int i = 0;
1315 const u_char *cp;
1316 char cresult[MAXDNAME + 1];
1317 const u_char *comp;
1318 int l;
1319
1320 cp = *sp;
1321 *buf = '\0';
1322
1323 if (cp >= ep)
1324 return NULL;
1325 while (cp < ep) {
1326 i = *cp;
1327 if (i == 0 || cp != *sp) {
1328 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1329 return NULL; /*result overrun*/
1330 }
1331 if (i == 0)
1332 break;
1333 cp++;
1334
1335 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1336 /* DNS compression */
1337 if (!base)
1338 return NULL;
1339
1340 comp = base + (i & 0x3f);
1341 if (dnsdecode(&comp, cp, base, cresult,
1342 sizeof(cresult)) == NULL)
1343 return NULL;
1344 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1345 return NULL; /*result overrun*/
1346 break;
1347 } else if ((i & 0x3f) == i) {
1348 if (i > ep - cp)
1349 return NULL; /*source overrun*/
1350 while (i-- > 0 && cp < ep) {
1351 l = snprintf(cresult, sizeof(cresult),
1352 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1353 if (l >= (int)sizeof(cresult) || l < 0)
1354 return NULL;
1355 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1356 return NULL; /*result overrun*/
1357 cp++;
1358 }
1359 } else
1360 return NULL; /*invalid label*/
1361 }
1362 if (i != 0)
1363 return NULL; /*not terminated*/
1364 cp++;
1365 *sp = cp;
1366 return buf;
1367 }
1368
1369 /*
1370 * pr_pack --
1371 * Print out the packet, if it came from us. This logic is necessary
1372 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1373 * which arrive ('tis only fair). This permits multiple copies of this
1374 * program to be run without having intermingled output (or statistics!).
1375 */
1376 void
1377 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1378 {
1379 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
1380 struct icmp6_hdr *icp;
1381 struct icmp6_nodeinfo *ni;
1382 int i;
1383 int hoplim;
1384 struct sockaddr *from;
1385 int fromlen;
1386 u_char *cp = NULL, *dp, *end = buf + cc;
1387 struct in6_pktinfo *pktinfo = NULL;
1388 struct timeval tv, tp;
1389 struct tv32 *tpp;
1390 double triptime = 0;
1391 int dupflag;
1392 size_t off;
1393 int oldfqdn;
1394 u_int16_t seq;
1395 char dnsname[MAXDNAME + 1];
1396
1397 gettimeofday(&tv, NULL);
1398
1399 if (!mhdr || !mhdr->msg_name ||
1400 mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1401 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1402 if (options & F_VERBOSE)
1403 warnx("invalid peername");
1404 return;
1405 }
1406 from = (struct sockaddr *)mhdr->msg_name;
1407 fromlen = mhdr->msg_namelen;
1408 if (cc < (int)sizeof(struct icmp6_hdr)) {
1409 if (options & F_VERBOSE)
1410 warnx("packet too short (%d bytes) from %s", cc,
1411 pr_addr(from, fromlen));
1412 return;
1413 }
1414 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1415 (options & F_VERBOSE) != 0)
1416 warnx("some control data discarded, insufficient buffer size");
1417 icp = (struct icmp6_hdr *)buf;
1418 ni = (struct icmp6_nodeinfo *)buf;
1419 off = 0;
1420
1421 if ((hoplim = get_hoplim(mhdr)) == -1) {
1422 warnx("failed to get receiving hop limit");
1423 return;
1424 }
1425 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1426 warnx("failed to get receiving packet information");
1427 return;
1428 }
1429
1430 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1431 seq = ntohs(icp->icmp6_seq);
1432 ++nreceived;
1433 if (timing) {
1434 tpp = (struct tv32 *)(icp + 1);
1435 tp.tv_sec = ntohl(tpp->tv32_sec);
1436 tp.tv_usec = ntohl(tpp->tv32_usec);
1437 tvsub(&tv, &tp);
1438 triptime = ((double)tv.tv_sec) * 1000.0 +
1439 ((double)tv.tv_usec) / 1000.0;
1440 tsum += triptime;
1441 tsumsq += triptime * triptime;
1442 if (triptime < tmin)
1443 tmin = triptime;
1444 if (triptime > tmax)
1445 tmax = triptime;
1446 }
1447
1448 if (TST(seq % mx_dup_ck)) {
1449 ++nrepeats;
1450 --nreceived;
1451 dupflag = 1;
1452 } else {
1453 SET(seq % mx_dup_ck);
1454 dupflag = 0;
1455 }
1456
1457 if (options & F_QUIET)
1458 return;
1459
1460 if (options & F_FLOOD)
1461 write(STDOUT_FILENO, &BSPACE, 1);
1462 else {
1463 printf("%d bytes from %s, icmp_seq=%u", cc,
1464 pr_addr(from, fromlen), seq);
1465 printf(" hlim=%d", hoplim);
1466 if ((options & F_VERBOSE) != 0) {
1467 struct sockaddr_in6 dstsa;
1468
1469 memset(&dstsa, 0, sizeof(dstsa));
1470 dstsa.sin6_family = AF_INET6;
1471 dstsa.sin6_len = sizeof(dstsa);
1472 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1473 dstsa.sin6_addr = pktinfo->ipi6_addr;
1474 printf(" dst=%s",
1475 pr_addr((struct sockaddr *)&dstsa,
1476 sizeof(dstsa)));
1477 }
1478 if (timing)
1479 printf(" time=%.3f ms", triptime);
1480 if (dupflag)
1481 printf("(DUP!)");
1482 /* check the data */
1483 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1484 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1485 for (i = 8; cp < end; ++i, ++cp, ++dp) {
1486 if (*cp != *dp) {
1487 printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1488 break;
1489 }
1490 }
1491 }
1492 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1493 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1494 ++nreceived;
1495 if (TST(seq % mx_dup_ck)) {
1496 ++nrepeats;
1497 --nreceived;
1498 dupflag = 1;
1499 } else {
1500 SET(seq % mx_dup_ck);
1501 dupflag = 0;
1502 }
1503
1504 if (options & F_QUIET)
1505 return;
1506
1507 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1508
1509 switch (ntohs(ni->ni_code)) {
1510 case ICMP6_NI_SUCCESS:
1511 break;
1512 case ICMP6_NI_REFUSED:
1513 printf("refused, type 0x%x", ntohs(ni->ni_type));
1514 goto fqdnend;
1515 case ICMP6_NI_UNKNOWN:
1516 printf("unknown, type 0x%x", ntohs(ni->ni_type));
1517 goto fqdnend;
1518 default:
1519 printf("unknown code 0x%x, type 0x%x",
1520 ntohs(ni->ni_code), ntohs(ni->ni_type));
1521 goto fqdnend;
1522 }
1523
1524 switch (ntohs(ni->ni_qtype)) {
1525 case NI_QTYPE_NOOP:
1526 printf("NodeInfo NOOP");
1527 break;
1528 case NI_QTYPE_SUPTYPES:
1529 pr_suptypes(ni, end - (u_char *)ni);
1530 break;
1531 case NI_QTYPE_NODEADDR:
1532 pr_nodeaddr(ni, end - (u_char *)ni);
1533 break;
1534 case NI_QTYPE_FQDN:
1535 default: /* XXX: for backward compatibility */
1536 cp = (u_char *)ni + ICMP6_NIRLEN;
1537 if (buf[off + ICMP6_NIRLEN] ==
1538 cc - off - ICMP6_NIRLEN - 1)
1539 oldfqdn = 1;
1540 else
1541 oldfqdn = 0;
1542 if (oldfqdn) {
1543 cp++; /* skip length */
1544 while (cp < end) {
1545 safeputc(*cp & 0xff);
1546 cp++;
1547 }
1548 } else {
1549 i = 0;
1550 while (cp < end) {
1551 if (dnsdecode((const u_char **)&cp, end,
1552 (const u_char *)(ni + 1), dnsname,
1553 sizeof(dnsname)) == NULL) {
1554 printf("???");
1555 break;
1556 }
1557 /*
1558 * name-lookup special handling for
1559 * truncated name
1560 */
1561 if (cp + 1 <= end && !*cp &&
1562 strlen(dnsname) > 0) {
1563 dnsname[strlen(dnsname) - 1] = '\0';
1564 cp++;
1565 }
1566 printf("%s%s", i > 0 ? "," : "",
1567 dnsname);
1568 }
1569 }
1570 if (options & F_VERBOSE) {
1571 int32_t ttl;
1572 int comma = 0;
1573
1574 printf(" ("); /*)*/
1575
1576 switch (ni->ni_code) {
1577 case ICMP6_NI_REFUSED:
1578 printf("refused");
1579 comma++;
1580 break;
1581 case ICMP6_NI_UNKNOWN:
1582 printf("unknown qtype");
1583 comma++;
1584 break;
1585 }
1586
1587 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1588 /* case of refusion, unknown */
1589 /*(*/
1590 putchar(')');
1591 goto fqdnend;
1592 }
1593 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1594 if (comma)
1595 printf(",");
1596 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1597 printf("TTL=%d:meaningless",
1598 (int)ttl);
1599 } else {
1600 if (ttl < 0) {
1601 printf("TTL=%d:invalid", ttl);
1602 } else
1603 printf("TTL=%d", ttl);
1604 }
1605 comma++;
1606
1607 if (oldfqdn) {
1608 if (comma)
1609 printf(",");
1610 printf("03 draft");
1611 comma++;
1612 } else {
1613 cp = (u_char *)ni + ICMP6_NIRLEN;
1614 if (cp == end) {
1615 if (comma)
1616 printf(",");
1617 printf("no name");
1618 comma++;
1619 }
1620 }
1621
1622 if (buf[off + ICMP6_NIRLEN] !=
1623 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1624 if (comma)
1625 printf(",");
1626 printf("invalid namelen:%d/%lu",
1627 buf[off + ICMP6_NIRLEN],
1628 (u_long)cc - off - ICMP6_NIRLEN - 1);
1629 comma++;
1630 }
1631 /*(*/
1632 putchar(')');
1633 }
1634 fqdnend:
1635 ;
1636 }
1637 } else {
1638 /* We've got something other than an ECHOREPLY */
1639 if (!(options & F_VERBOSE))
1640 return;
1641 printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1642 pr_icmph(icp, end);
1643 }
1644
1645 if (!(options & F_FLOOD)) {
1646 putchar('\n');
1647 if (options & F_VERBOSE)
1648 pr_exthdrs(mhdr);
1649 fflush(stdout);
1650 }
1651 #undef safeputc
1652 }
1653
1654 void
1655 pr_exthdrs(struct msghdr *mhdr)
1656 {
1657 ssize_t bufsize;
1658 void *bufp;
1659 struct cmsghdr *cm;
1660
1661 bufsize = 0;
1662 bufp = mhdr->msg_control;
1663 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1664 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1665 if (cm->cmsg_level != IPPROTO_IPV6)
1666 continue;
1667
1668 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1669 if (bufsize <= 0)
1670 continue;
1671 switch (cm->cmsg_type) {
1672 case IPV6_HOPOPTS:
1673 printf(" HbH Options: ");
1674 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1675 break;
1676 case IPV6_DSTOPTS:
1677 #ifdef IPV6_RTHDRDSTOPTS
1678 case IPV6_RTHDRDSTOPTS:
1679 #endif
1680 printf(" Dst Options: ");
1681 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1682 break;
1683 case IPV6_RTHDR:
1684 printf(" Routing: ");
1685 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1686 break;
1687 }
1688 }
1689 }
1690
1691 #ifdef USE_RFC3542
1692 void
1693 pr_ip6opt(void *extbuf, size_t bufsize)
1694 {
1695 struct ip6_hbh *ext;
1696 int currentlen;
1697 u_int8_t type;
1698 socklen_t extlen, len, origextlen;
1699 void *databuf;
1700 size_t offset;
1701 u_int16_t value2;
1702 u_int32_t value4;
1703
1704 ext = (struct ip6_hbh *)extbuf;
1705 extlen = (ext->ip6h_len + 1) * 8;
1706 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1707 (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1708
1709 /*
1710 * Bounds checking on the ancillary data buffer:
1711 * subtract the size of a cmsg structure from the buffer size.
1712 */
1713 if (bufsize < (extlen + CMSG_SPACE(0))) {
1714 origextlen = extlen;
1715 extlen = bufsize - CMSG_SPACE(0);
1716 warnx("options truncated, showing only %u (total=%u)",
1717 (unsigned int)(extlen / 8 - 1),
1718 (unsigned int)(ext->ip6h_len));
1719 }
1720
1721 currentlen = 0;
1722 while (1) {
1723 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1724 &type, &len, &databuf);
1725 if (currentlen == -1)
1726 break;
1727 switch (type) {
1728 /*
1729 * Note that inet6_opt_next automatically skips any padding
1730 * optins.
1731 */
1732 case IP6OPT_JUMBO:
1733 offset = 0;
1734 offset = inet6_opt_get_val(databuf, offset,
1735 &value4, sizeof(value4));
1736 printf(" Jumbo Payload Opt: Length %u\n",
1737 (u_int32_t)ntohl(value4));
1738 break;
1739 /* FIXME: RFC3542 option is IP6OPT_ROUTER_ALERT. */
1740 case IP6OPT_RTALERT:
1741 offset = 0;
1742 offset = inet6_opt_get_val(databuf, offset,
1743 &value2, sizeof(value2));
1744 printf(" Router Alert Opt: Type %u\n",
1745 ntohs(value2));
1746 break;
1747 default:
1748 printf(" Received Opt %u len %lu\n",
1749 type, (unsigned long)len);
1750 break;
1751 }
1752 }
1753 return;
1754 }
1755 #else /* !USE_RFC3542 */
1756 /* ARGSUSED */
1757 void
1758 pr_ip6opt(void *extbuf __unused, size_t bufsize __unused)
1759 {
1760 putchar('\n');
1761 return;
1762 }
1763 #endif /* USE_RFC3542 */
1764
1765 #ifdef USE_RFC3542
1766 void
1767 pr_rthdr(void *extbuf, size_t bufsize __unused)
1768 {
1769 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1770
1771 /* print fixed part of the header */
1772 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1773 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1774 printf("segments unknown, ");
1775 printf("%d left\n", rh->ip6r_segleft);
1776 return;
1777
1778 }
1779
1780 #else /* !USE_RFC3542 */
1781 /* ARGSUSED */
1782 void
1783 pr_rthdr(void *extbuf __unused)
1784 {
1785 putchar('\n');
1786 return;
1787 }
1788 #endif /* USE_RFC3542 */
1789
1790 int
1791 pr_bitrange(u_int32_t v, int soff, int ii)
1792 {
1793 int off;
1794 int i;
1795
1796 off = 0;
1797 while (off < 32) {
1798 /* shift till we have 0x01 */
1799 if ((v & 0x01) == 0) {
1800 if (ii > 1)
1801 printf("-%u", soff + off - 1);
1802 ii = 0;
1803 switch (v & 0x0f) {
1804 case 0x00:
1805 v >>= 4;
1806 off += 4;
1807 continue;
1808 case 0x08:
1809 v >>= 3;
1810 off += 3;
1811 continue;
1812 case 0x04: case 0x0c:
1813 v >>= 2;
1814 off += 2;
1815 continue;
1816 default:
1817 v >>= 1;
1818 off += 1;
1819 continue;
1820 }
1821 }
1822
1823 /* we have 0x01 with us */
1824 for (i = 0; i < 32 - off; i++) {
1825 if ((v & (0x01 << i)) == 0)
1826 break;
1827 }
1828 if (!ii)
1829 printf(" %u", soff + off);
1830 ii += i;
1831 v >>= i; off += i;
1832 }
1833 return ii;
1834 }
1835
1836 /* struct icmp6_nodeinfo *ni: ni->qtype must be SUPTYPES */
1837 void
1838 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1839 {
1840 size_t clen;
1841 u_int32_t v;
1842 const u_char *cp, *end;
1843 u_int16_t cur;
1844 struct cbit {
1845 u_int16_t words; /*32bit count*/
1846 u_int16_t skip;
1847 } cbit;
1848 #define MAXQTYPES (1 << 16)
1849 size_t off;
1850 int b;
1851
1852 cp = (u_char *)(ni + 1);
1853 end = ((u_char *)ni) + nilen;
1854 cur = 0;
1855 b = 0;
1856
1857 printf("NodeInfo Supported Qtypes");
1858 if (options & F_VERBOSE) {
1859 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
1860 printf(", compressed bitmap");
1861 else
1862 printf(", raw bitmap");
1863 }
1864
1865 while (cp < end) {
1866 clen = (size_t)(end - cp);
1867 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
1868 if (clen == 0 || clen > MAXQTYPES / 8 ||
1869 clen % sizeof(v)) {
1870 printf("???");
1871 return;
1872 }
1873 } else {
1874 if (clen < sizeof(cbit) || clen % sizeof(v))
1875 return;
1876 memcpy(&cbit, cp, sizeof(cbit));
1877 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
1878 clen)
1879 return;
1880 cp += sizeof(cbit);
1881 clen = ntohs(cbit.words) * sizeof(v);
1882 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
1883 MAXQTYPES)
1884 return;
1885 }
1886
1887 for (off = 0; off < clen; off += sizeof(v)) {
1888 memcpy(&v, cp + off, sizeof(v));
1889 v = (u_int32_t)ntohl(v);
1890 b = pr_bitrange(v, (int)(cur + off * 8), b);
1891 }
1892 /* flush the remaining bits */
1893 b = pr_bitrange(0, (int)(cur + off * 8), b);
1894
1895 cp += clen;
1896 cur += clen * 8;
1897 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
1898 cur += ntohs(cbit.skip) * 32;
1899 }
1900 }
1901
1902 /* struct icmp6_nodeinfo *ni: ni->qtype must be NODEADDR */
1903 void
1904 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
1905 {
1906 u_char *cp = (u_char *)(ni + 1);
1907 char ntop_buf[INET6_ADDRSTRLEN];
1908 int withttl = 0;
1909
1910 nilen -= sizeof(struct icmp6_nodeinfo);
1911
1912 if (options & F_VERBOSE) {
1913 switch (ni->ni_code) {
1914 case ICMP6_NI_REFUSED:
1915 printf("refused");
1916 break;
1917 case ICMP6_NI_UNKNOWN:
1918 printf("unknown qtype");
1919 break;
1920 }
1921 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
1922 printf(" truncated");
1923 }
1924 putchar('\n');
1925 if (nilen <= 0)
1926 printf(" no address\n");
1927
1928 /*
1929 * In icmp-name-lookups 05 and later, TTL of each returned address
1930 * is contained in the resposne. We try to detect the version
1931 * by the length of the data, but note that the detection algorithm
1932 * is incomplete. We assume the latest draft by default.
1933 */
1934 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
1935 withttl = 1;
1936 while (nilen > 0) {
1937 u_int32_t ttl = 0;
1938
1939 if (withttl) {
1940 /* XXX: alignment? */
1941 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
1942 cp += sizeof(u_int32_t);
1943 nilen -= sizeof(u_int32_t);
1944 }
1945
1946 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
1947 NULL)
1948 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
1949 printf(" %s", ntop_buf);
1950 if (withttl) {
1951 if (ttl == 0xffffffff) {
1952 /*
1953 * XXX: can this convention be applied to all
1954 * type of TTL (i.e. non-ND TTL)?
1955 */
1956 printf("(TTL=infty)");
1957 }
1958 else
1959 printf("(TTL=%u)", ttl);
1960 }
1961 putchar('\n');
1962
1963 nilen -= sizeof(struct in6_addr);
1964 cp += sizeof(struct in6_addr);
1965 }
1966 }
1967
1968 int
1969 get_hoplim(struct msghdr *mhdr)
1970 {
1971 struct cmsghdr *cm;
1972
1973 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1974 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1975 if (cm->cmsg_len == 0)
1976 return(-1);
1977
1978 if (cm->cmsg_level == IPPROTO_IPV6 &&
1979 cm->cmsg_type == IPV6_HOPLIMIT &&
1980 cm->cmsg_len == CMSG_LEN(sizeof(int)))
1981 return(*(int *)CMSG_DATA(cm));
1982 }
1983
1984 return(-1);
1985 }
1986
1987 struct in6_pktinfo *
1988 get_rcvpktinfo(struct msghdr *mhdr)
1989 {
1990 struct cmsghdr *cm;
1991
1992 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1993 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1994 if (cm->cmsg_len == 0)
1995 return(NULL);
1996
1997 if (cm->cmsg_level == IPPROTO_IPV6 &&
1998 cm->cmsg_type == IPV6_PKTINFO &&
1999 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2000 return((struct in6_pktinfo *)CMSG_DATA(cm));
2001 }
2002
2003 return(NULL);
2004 }
2005
2006 #ifdef IPV6_RECVPATHMTU
2007 int
2008 get_pathmtu(struct msghdr *mhdr)
2009 {
2010 struct cmsghdr *cm;
2011 struct ip6_mtuinfo *mtuctl = NULL;
2012
2013 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2014 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2015 if (cm->cmsg_len == 0)
2016 return(0);
2017
2018 if (cm->cmsg_level == IPPROTO_IPV6 &&
2019 cm->cmsg_type == IPV6_PATHMTU &&
2020 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2021 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2022
2023 /*
2024 * If the notified destination is different from
2025 * the one we are pinging, just ignore the info.
2026 * We check the scope ID only when both notified value
2027 * and our own value have non-0 values, because we may
2028 * have used the default scope zone ID for sending,
2029 * in which case the scope ID value is 0.
2030 */
2031 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2032 &dst.sin6_addr) ||
2033 (mtuctl->ip6m_addr.sin6_scope_id &&
2034 dst.sin6_scope_id &&
2035 mtuctl->ip6m_addr.sin6_scope_id !=
2036 dst.sin6_scope_id)) {
2037 if ((options & F_VERBOSE) != 0) {
2038 printf("path MTU for %s is notified. "
2039 "(ignored)\n",
2040 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2041 sizeof(mtuctl->ip6m_addr)));
2042 }
2043 return(0);
2044 }
2045
2046 /*
2047 * Ignore an invalid MTU. XXX: can we just believe
2048 * the kernel check?
2049 */
2050 if (mtuctl->ip6m_mtu < IPV6_MMTU)
2051 return(0);
2052
2053 /* notification for our destination. return the MTU. */
2054 return((int)mtuctl->ip6m_mtu);
2055 }
2056 }
2057 return(0);
2058 }
2059 #endif
2060
2061 /*
2062 * tvsub --
2063 * Subtract 2 timeval structs: out = out - in. Out is assumed to
2064 * be >= in.
2065 */
2066 void
2067 tvsub(struct timeval *out, struct timeval *in)
2068 {
2069 if ((out->tv_usec -= in->tv_usec) < 0) {
2070 --out->tv_sec;
2071 out->tv_usec += 1000000;
2072 }
2073 out->tv_sec -= in->tv_sec;
2074 }
2075
2076 /*
2077 * onint --
2078 * SIGINT handler.
2079 */
2080 /* ARGSUSED */
2081 void
2082 onint(int sig __unused)
2083 {
2084 summary();
2085
2086 signal(SIGINT, SIG_DFL);
2087 kill(getpid(), SIGINT);
2088
2089 /* NOTREACHED */
2090 exit(1);
2091 }
2092
2093 /*
2094 * summary --
2095 * Print out statistics.
2096 */
2097 void
2098 summary(void)
2099 {
2100
2101 printf("\n--- %s ping6 statistics ---\n", hostname);
2102 printf("%ld packets transmitted, ", ntransmitted);
2103 printf("%ld packets received, ", nreceived);
2104 if (nrepeats)
2105 printf("+%ld duplicates, ", nrepeats);
2106 if (ntransmitted) {
2107 if (nreceived > ntransmitted)
2108 printf("-- somebody's duplicating packets!");
2109 else
2110 printf("%.1f%% packet loss",
2111 ((((double)ntransmitted - nreceived) * 100.0) /
2112 ntransmitted));
2113 }
2114 putchar('\n');
2115 if (nreceived && timing) {
2116 /* Only display average to microseconds */
2117 double num = nreceived + nrepeats;
2118 double avg = tsum / num;
2119 double dev = sqrt(tsumsq / num - avg * avg);
2120 printf(
2121 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2122 tmin, avg, tmax, dev);
2123 fflush(stdout);
2124 }
2125 fflush(stdout);
2126 }
2127
2128 /*subject type*/
2129 static const char *niqcode[] = {
2130 "IPv6 address",
2131 "DNS label", /*or empty*/
2132 "IPv4 address",
2133 };
2134
2135 /*result code*/
2136 static const char *nircode[] = {
2137 "Success", "Refused", "Unknown",
2138 };
2139
2140
2141 /*
2142 * pr_icmph --
2143 * Print a descriptive string about an ICMP header.
2144 */
2145 void
2146 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2147 {
2148 char ntop_buf[INET6_ADDRSTRLEN];
2149 struct nd_redirect *red;
2150 struct icmp6_nodeinfo *ni;
2151 char dnsname[MAXDNAME + 1];
2152 const u_char *cp;
2153 size_t l;
2154
2155 switch (icp->icmp6_type) {
2156 case ICMP6_DST_UNREACH:
2157 switch (icp->icmp6_code) {
2158 case ICMP6_DST_UNREACH_NOROUTE:
2159 printf("No Route to Destination\n");
2160 break;
2161 case ICMP6_DST_UNREACH_ADMIN:
2162 printf("Destination Administratively "
2163 "Unreachable\n");
2164 break;
2165 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2166 printf("Destination Unreachable Beyond Scope\n");
2167 break;
2168 case ICMP6_DST_UNREACH_ADDR:
2169 printf("Destination Host Unreachable\n");
2170 break;
2171 case ICMP6_DST_UNREACH_NOPORT:
2172 printf("Destination Port Unreachable\n");
2173 break;
2174 default:
2175 printf("Destination Unreachable, Bad Code: %d\n",
2176 icp->icmp6_code);
2177 break;
2178 }
2179 /* Print returned IP header information */
2180 pr_retip((struct ip6_hdr *)(icp + 1), end);
2181 break;
2182 case ICMP6_PACKET_TOO_BIG:
2183 printf("Packet too big mtu = %d\n",
2184 (int)ntohl(icp->icmp6_mtu));
2185 pr_retip((struct ip6_hdr *)(icp + 1), end);
2186 break;
2187 case ICMP6_TIME_EXCEEDED:
2188 switch (icp->icmp6_code) {
2189 case ICMP6_TIME_EXCEED_TRANSIT:
2190 printf("Time to live exceeded\n");
2191 break;
2192 case ICMP6_TIME_EXCEED_REASSEMBLY:
2193 printf("Frag reassembly time exceeded\n");
2194 break;
2195 default:
2196 printf("Time exceeded, Bad Code: %d\n",
2197 icp->icmp6_code);
2198 break;
2199 }
2200 pr_retip((struct ip6_hdr *)(icp + 1), end);
2201 break;
2202 case ICMP6_PARAM_PROB:
2203 printf("Parameter problem: ");
2204 switch (icp->icmp6_code) {
2205 case ICMP6_PARAMPROB_HEADER:
2206 printf("Erroneous Header ");
2207 break;
2208 case ICMP6_PARAMPROB_NEXTHEADER:
2209 printf("Unknown Nextheader ");
2210 break;
2211 case ICMP6_PARAMPROB_OPTION:
2212 printf("Unrecognized Option ");
2213 break;
2214 default:
2215 printf("Bad code(%d) ", icp->icmp6_code);
2216 break;
2217 }
2218 printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr));
2219 pr_retip((struct ip6_hdr *)(icp + 1), end);
2220 break;
2221 case ICMP6_ECHO_REQUEST:
2222 printf("Echo Request");
2223 /* XXX ID + Seq + Data */
2224 break;
2225 case ICMP6_ECHO_REPLY:
2226 printf("Echo Reply");
2227 /* XXX ID + Seq + Data */
2228 break;
2229 case ICMP6_MEMBERSHIP_QUERY:
2230 printf("Listener Query");
2231 break;
2232 case ICMP6_MEMBERSHIP_REPORT:
2233 printf("Listener Report");
2234 break;
2235 case ICMP6_MEMBERSHIP_REDUCTION:
2236 printf("Listener Done");
2237 break;
2238 case ND_ROUTER_SOLICIT:
2239 printf("Router Solicitation");
2240 break;
2241 case ND_ROUTER_ADVERT:
2242 printf("Router Advertisement");
2243 break;
2244 case ND_NEIGHBOR_SOLICIT:
2245 printf("Neighbor Solicitation");
2246 break;
2247 case ND_NEIGHBOR_ADVERT:
2248 printf("Neighbor Advertisement");
2249 break;
2250 case ND_REDIRECT:
2251 red = (struct nd_redirect *)icp;
2252 printf("Redirect\n");
2253 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2254 sizeof(ntop_buf)))
2255 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2256 printf("Destination: %s", ntop_buf);
2257 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2258 sizeof(ntop_buf)))
2259 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2260 printf(" New Target: %s", ntop_buf);
2261 break;
2262 case ICMP6_NI_QUERY:
2263 printf("Node Information Query");
2264 /* XXX ID + Seq + Data */
2265 ni = (struct icmp6_nodeinfo *)icp;
2266 l = end - (u_char *)(ni + 1);
2267 printf(", ");
2268 switch (ntohs(ni->ni_qtype)) {
2269 case NI_QTYPE_NOOP:
2270 printf("NOOP");
2271 break;
2272 case NI_QTYPE_SUPTYPES:
2273 printf("Supported qtypes");
2274 break;
2275 case NI_QTYPE_FQDN:
2276 printf("DNS name");
2277 break;
2278 case NI_QTYPE_NODEADDR:
2279 printf("nodeaddr");
2280 break;
2281 case NI_QTYPE_IPV4ADDR:
2282 printf("IPv4 nodeaddr");
2283 break;
2284 default:
2285 printf("unknown qtype");
2286 break;
2287 }
2288 if (options & F_VERBOSE) {
2289 switch (ni->ni_code) {
2290 case ICMP6_NI_SUBJ_IPV6:
2291 if (l == sizeof(struct in6_addr) &&
2292 inet_ntop(AF_INET6, ni + 1, ntop_buf,
2293 sizeof(ntop_buf)) != NULL) {
2294 printf(", subject=%s(%s)",
2295 niqcode[ni->ni_code], ntop_buf);
2296 } else {
2297 #if 1
2298 /* backward compat to -W */
2299 printf(", oldfqdn");
2300 #else
2301 printf(", invalid");
2302 #endif
2303 }
2304 break;
2305 case ICMP6_NI_SUBJ_FQDN:
2306 if (end == (u_char *)(ni + 1)) {
2307 printf(", no subject");
2308 break;
2309 }
2310 printf(", subject=%s", niqcode[ni->ni_code]);
2311 cp = (const u_char *)(ni + 1);
2312 if (dnsdecode(&cp, end, NULL, dnsname,
2313 sizeof(dnsname)) != NULL)
2314 printf("(%s)", dnsname);
2315 else
2316 printf("(invalid)");
2317 break;
2318 case ICMP6_NI_SUBJ_IPV4:
2319 if (l == sizeof(struct in_addr) &&
2320 inet_ntop(AF_INET, ni + 1, ntop_buf,
2321 sizeof(ntop_buf)) != NULL) {
2322 printf(", subject=%s(%s)",
2323 niqcode[ni->ni_code], ntop_buf);
2324 } else
2325 printf(", invalid");
2326 break;
2327 default:
2328 printf(", invalid");
2329 break;
2330 }
2331 }
2332 break;
2333 case ICMP6_NI_REPLY:
2334 printf("Node Information Reply");
2335 /* XXX ID + Seq + Data */
2336 ni = (struct icmp6_nodeinfo *)icp;
2337 printf(", ");
2338 switch (ntohs(ni->ni_qtype)) {
2339 case NI_QTYPE_NOOP:
2340 printf("NOOP");
2341 break;
2342 case NI_QTYPE_SUPTYPES:
2343 printf("Supported qtypes");
2344 break;
2345 case NI_QTYPE_FQDN:
2346 printf("DNS name");
2347 break;
2348 case NI_QTYPE_NODEADDR:
2349 printf("nodeaddr");
2350 break;
2351 case NI_QTYPE_IPV4ADDR:
2352 printf("IPv4 nodeaddr");
2353 break;
2354 default:
2355 printf("unknown qtype");
2356 break;
2357 }
2358 if (options & F_VERBOSE) {
2359 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2360 printf(", invalid");
2361 else
2362 printf(", %s", nircode[ni->ni_code]);
2363 }
2364 break;
2365 default:
2366 printf("Bad ICMP type: %d", icp->icmp6_type);
2367 }
2368 }
2369
2370 /*
2371 * pr_iph --
2372 * Print an IP6 header.
2373 */
2374 void
2375 pr_iph(struct ip6_hdr *ip6)
2376 {
2377 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2378 u_int8_t tc;
2379 char ntop_buf[INET6_ADDRSTRLEN];
2380
2381 tc = *(&ip6->ip6_vfc + 1); /* XXX */
2382 tc = (tc >> 4) & 0x0f;
2383 tc |= (ip6->ip6_vfc << 4);
2384
2385 printf("Vr TC Flow Plen Nxt Hlim\n");
2386 printf(" %1x %02x %05x %04x %02x %02x\n",
2387 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2388 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2389 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2390 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2391 printf("%s->", ntop_buf);
2392 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2393 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2394 printf("%s\n", ntop_buf);
2395 }
2396
2397 /*
2398 * pr_addr --
2399 * Return an ascii host address as a dotted quad and optionally with
2400 * a hostname.
2401 */
2402 const char *
2403 pr_addr(struct sockaddr *addr, int addrlen)
2404 {
2405 static char buf[NI_MAXHOST];
2406 int flag = 0;
2407
2408 if ((options & F_HOSTNAME) == 0)
2409 flag |= NI_NUMERICHOST;
2410
2411 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2412 return (buf);
2413 else
2414 return "?";
2415 }
2416
2417 /*
2418 * pr_retip --
2419 * Dump some info on a returned (via ICMPv6) IPv6 packet.
2420 */
2421 void
2422 pr_retip(struct ip6_hdr *ip6, u_char *end)
2423 {
2424 u_char *cp = (u_char *)ip6, nh;
2425 int hlen;
2426
2427 if (end - (u_char *)ip6 < (int)sizeof(*ip6)) {
2428 printf("IP6");
2429 goto trunc;
2430 }
2431 pr_iph(ip6);
2432 hlen = sizeof(*ip6);
2433
2434 nh = ip6->ip6_nxt;
2435 cp += hlen;
2436 while (end - cp >= 8) {
2437 switch (nh) {
2438 case IPPROTO_HOPOPTS:
2439 printf("HBH ");
2440 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2441 nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2442 break;
2443 case IPPROTO_DSTOPTS:
2444 printf("DSTOPT ");
2445 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2446 nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2447 break;
2448 case IPPROTO_FRAGMENT:
2449 printf("FRAG ");
2450 hlen = sizeof(struct ip6_frag);
2451 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2452 break;
2453 case IPPROTO_ROUTING:
2454 printf("RTHDR ");
2455 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2456 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2457 break;
2458 #ifdef IPSEC
2459 case IPPROTO_AH:
2460 printf("AH ");
2461 hlen = (((struct ah *)cp)->ah_len+2) << 2;
2462 nh = ((struct ah *)cp)->ah_nxt;
2463 break;
2464 #endif
2465 case IPPROTO_ICMPV6:
2466 printf("ICMP6: type = %d, code = %d\n",
2467 *cp, *(cp + 1));
2468 return;
2469 case IPPROTO_ESP:
2470 printf("ESP\n");
2471 return;
2472 case IPPROTO_TCP:
2473 printf("TCP: from port %u, to port %u (decimal)\n",
2474 (*cp * 256 + *(cp + 1)),
2475 (*(cp + 2) * 256 + *(cp + 3)));
2476 return;
2477 case IPPROTO_UDP:
2478 printf("UDP: from port %u, to port %u (decimal)\n",
2479 (*cp * 256 + *(cp + 1)),
2480 (*(cp + 2) * 256 + *(cp + 3)));
2481 return;
2482 default:
2483 printf("Unknown Header(%d)\n", nh);
2484 return;
2485 }
2486
2487 if ((cp += hlen) >= end)
2488 goto trunc;
2489 }
2490 if (end - cp < 8)
2491 goto trunc;
2492
2493 putchar('\n');
2494 return;
2495
2496 trunc:
2497 printf("...\n");
2498 return;
2499 }
2500
2501 void
2502 fill(char *bp, char *patp)
2503 {
2504 int ii, jj, kk;
2505 int pat[16];
2506 char *cp;
2507
2508 for (cp = patp; *cp; cp++)
2509 if (!isxdigit(*cp))
2510 errx(1, "patterns must be specified as hex digits");
2511 ii = sscanf(patp,
2512 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2513 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2514 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2515 &pat[13], &pat[14], &pat[15]);
2516
2517 /* xxx */
2518 if (ii > 0)
2519 for (kk = 0;
2520 kk <= MAXDATALEN - (8 + (int)sizeof(struct tv32) + ii);
2521 kk += ii)
2522 for (jj = 0; jj < ii; ++jj)
2523 bp[jj + kk] = pat[jj];
2524 if (!(options & F_QUIET)) {
2525 printf("PATTERN: 0x");
2526 for (jj = 0; jj < ii; ++jj)
2527 printf("%02x", bp[jj] & 0xFF);
2528 printf("\n");
2529 }
2530 }
2531
2532 #ifdef IPSEC
2533 #ifdef IPSEC_POLICY_IPSEC
2534 int
2535 setpolicy(int so __unused, char *policy)
2536 {
2537 char *buf;
2538
2539 if (policy == NULL)
2540 return 0; /* ignore */
2541
2542 buf = ipsec_set_policy(policy, strlen(policy));
2543 if (buf == NULL)
2544 errx(1, "%s", ipsec_strerror());
2545 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2546 ipsec_get_policylen(buf)) < 0)
2547 warnx("Unable to set IPsec policy");
2548 free(buf);
2549
2550 return 0;
2551 }
2552 #endif
2553 #endif
2554
2555 char *
2556 nigroup(char *name)
2557 {
2558 char *p;
2559 char *q;
2560 MD5_CTX ctxt;
2561 u_int8_t digest[16];
2562 u_int8_t c;
2563 size_t l;
2564 char hbuf[NI_MAXHOST];
2565 struct in6_addr in6;
2566
2567 p = strchr(name, '.');
2568 if (!p)
2569 p = name + strlen(name);
2570 l = p - name;
2571 if (l > 63 || l > sizeof(hbuf) - 1)
2572 return NULL; /*label too long*/
2573 strncpy(hbuf, name, l);
2574 hbuf[(int)l] = '\0';
2575
2576 for (q = name; *q; q++) {
2577 if (isupper(*(unsigned char *)q))
2578 *q = tolower(*(unsigned char *)q);
2579 }
2580
2581 /* generate 8 bytes of pseudo-random value. */
2582 memset(&ctxt, 0, sizeof(ctxt));
2583 MD5Init(&ctxt);
2584 c = l & 0xff;
2585 MD5Update(&ctxt, &c, sizeof(c));
2586 MD5Update(&ctxt, (unsigned char *)name, l);
2587 MD5Final(digest, &ctxt);
2588
2589 if (inet_pton(AF_INET6, "ff02::2:0000:0000", &in6) != 1)
2590 return NULL; /*XXX*/
2591 bcopy(digest, &in6.s6_addr[12], 4);
2592
2593 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2594 return NULL;
2595
2596 return strdup(hbuf);
2597 }
2598
2599 void
2600 usage(void)
2601 {
2602 fprintf(stderr,
2603 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2604 "A"
2605 #endif
2606 "usage: ping6 [-"
2607 "d"
2608 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2609 "E"
2610 #endif
2611 "fH"
2612 #ifdef IPV6_USE_MIN_MTU
2613 "m"
2614 #endif
2615 "nNqtvwW] "
2616 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2617 " [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2618 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2619 " [-P policy]"
2620 #endif
2621 "\n"
2622 " [-p pattern] [-S sourceaddr] [-s packetsize] "
2623 "[hops ...] host\n");
2624 exit(1);
2625 }
DragonFly BSD