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
32 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */
33
34 /*
35 * Copyright (c) 1989, 1993
36 * The Regents of the University of California. All rights reserved.
37 *
38 * This code is derived from software contributed to Berkeley by
39 * Mike Muuss.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 4. Neither the name of the University nor the names of its contributors
50 * may be used to endorse or promote products derived from this software
51 * without specific prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 */
65
66 #ifndef lint
67 static const char copyright[] =
68 "@(#) Copyright (c) 1989, 1993\n\
69 The Regents of the University of California. All rights reserved.\n";
70 #endif /* not lint */
71
72 #ifndef lint
73 #if 0
74 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
75 #endif
76 #endif /* not lint */
77
78 #include <sys/cdefs.h>
79 __FBSDID("$FreeBSD: stable/9/sbin/ping6/ping6.c 298843 2016-04-30 09:43:01Z ngie $");
80
81 /*
82 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
83 * measure round-trip-delays and packet loss across network paths.
84 *
85 * Author -
86 * Mike Muuss
87 * U. S. Army Ballistic Research Laboratory
88 * December, 1983
89 *
90 * Status -
91 * Public Domain. Distribution Unlimited.
92 * Bugs -
93 * More statistics could always be gathered.
94 * This program has to run SUID to ROOT to access the ICMP socket.
95 */
96 /*
97 * NOTE:
98 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
99 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link*
100 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of
101 * network attached to 1 or more interfaces)
102 */
103
104 #include <sys/param.h>
105 #include <sys/uio.h>
106 #include <sys/socket.h>
107 #include <sys/time.h>
108
109 #include <net/if.h>
110 #include <net/route.h>
111
112 #include <netinet/in.h>
113 #include <netinet/ip6.h>
114 #include <netinet/icmp6.h>
115 #include <arpa/inet.h>
116 #include <arpa/nameser.h>
117 #include <netdb.h>
118
119 #include <ctype.h>
120 #include <err.h>
121 #include <errno.h>
122 #include <fcntl.h>
123 #include <math.h>
124 #include <signal.h>
125 #include <stdio.h>
126 #include <stdlib.h>
127 #include <string.h>
128 #include <unistd.h>
129 #ifdef HAVE_POLL_H
130 #include <poll.h>
131 #endif
132
133 #ifdef IPSEC
134 #include <netipsec/ah.h>
135 #include <netipsec/ipsec.h>
136 #endif
137
138 #include <md5.h>
139
140 struct tv32 {
141 u_int32_t tv32_sec;
142 u_int32_t tv32_usec;
143 };
144
145 #define MAXPACKETLEN 131072
146 #define IP6LEN 40
147 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */
148 #define ICMP6ECHOTMLEN sizeof(struct tv32)
149 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8)
150 # define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */
151 /* FQDN case, 64 bits of nonce + 32 bits ttl */
152 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12)
153 #define EXTRA 256 /* for AH and various other headers. weird. */
154 #define DEFDATALEN ICMP6ECHOTMLEN
155 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
156 #define NROUTES 9 /* number of record route slots */
157
158 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
159 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
160 #define SET(bit) (A(bit) |= B(bit))
161 #define CLR(bit) (A(bit) &= (~B(bit)))
162 #define TST(bit) (A(bit) & B(bit))
163
164 #define F_FLOOD 0x0001
165 #define F_INTERVAL 0x0002
166 #define F_PINGFILLED 0x0008
167 #define F_QUIET 0x0010
168 #define F_RROUTE 0x0020
169 #define F_SO_DEBUG 0x0040
170 #define F_VERBOSE 0x0100
171 #ifdef IPSEC
172 #ifdef IPSEC_POLICY_IPSEC
173 #define F_POLICY 0x0400
174 #else
175 #define F_AUTHHDR 0x0200
176 #define F_ENCRYPT 0x0400
177 #endif /*IPSEC_POLICY_IPSEC*/
178 #endif /*IPSEC*/
179 #define F_NODEADDR 0x0800
180 #define F_FQDN 0x1000
181 #define F_INTERFACE 0x2000
182 #define F_SRCADDR 0x4000
183 #define F_HOSTNAME 0x10000
184 #define F_FQDNOLD 0x20000
185 #define F_NIGROUP 0x40000
186 #define F_SUPTYPES 0x80000
187 #define F_NOMINMTU 0x100000
188 #define F_ONCE 0x200000
189 #define F_AUDIBLE 0x400000
190 #define F_MISSED 0x800000
191 #define F_DONTFRAG 0x1000000
192 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
193 u_int options;
194
195 #define IN6LEN sizeof(struct in6_addr)
196 #define SA6LEN sizeof(struct sockaddr_in6)
197 #define DUMMY_PORT 10101
198
199 #define SIN6(s) ((struct sockaddr_in6 *)(s))
200
201 /*
202 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
203 * number of received sequence numbers we can keep track of. Change 128
204 * to 8192 for complete accuracy...
205 */
206 #define MAX_DUP_CHK (8 * 8192)
207 int mx_dup_ck = MAX_DUP_CHK;
208 char rcvd_tbl[MAX_DUP_CHK / 8];
209
210 struct addrinfo *res = NULL;
211 struct sockaddr_in6 dst; /* who to ping6 */
212 struct sockaddr_in6 src; /* src addr of this packet */
213 socklen_t srclen;
214 int datalen = DEFDATALEN;
215 int s; /* socket file descriptor */
216 u_char outpack[MAXPACKETLEN];
217 char BSPACE = '\b'; /* characters written for flood */
218 char BBELL = '\a'; /* characters written for AUDIBLE */
219 char DOT = '.';
220 char *hostname;
221 int ident; /* process id to identify our packets */
222 u_int8_t nonce[8]; /* nonce field for node information */
223 int hoplimit = -1; /* hoplimit */
224 int pathmtu = 0; /* path MTU for the destination. 0 = unspec. */
225 u_char *packet = NULL;
226 #ifdef HAVE_POLL_H
227 struct pollfd fdmaskp[1];
228 #else
229 fd_set *fdmaskp = NULL;
230 int fdmasks;
231 #endif
232
233 /* counters */
234 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
235 long npackets; /* max packets to transmit */
236 long nreceived; /* # of packets we got back */
237 long nrepeats; /* number of duplicates */
238 long ntransmitted; /* sequence # for outbound packets = #sent */
239 struct timeval interval = {1, 0}; /* interval between packets */
240
241 /* timing */
242 int timing; /* flag to do timing */
243 double tmin = 999999999.0; /* minimum round trip time */
244 double tmax = 0.0; /* maximum round trip time */
245 double tsum = 0.0; /* sum of all times, for doing average */
246 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
247
248 /* for node addresses */
249 u_short naflags;
250
251 /* for ancillary data(advanced API) */
252 struct msghdr smsghdr;
253 struct iovec smsgiov;
254 char *scmsg = 0;
255
256 volatile sig_atomic_t seenalrm;
257 volatile sig_atomic_t seenint;
258 #ifdef SIGINFO
259 volatile sig_atomic_t seeninfo;
260 #endif
261
262 int main(int, char *[]);
263 void fill(char *, char *);
264 int get_hoplim(struct msghdr *);
265 int get_pathmtu(struct msghdr *);
266 struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
267 void onsignal(int);
268 void retransmit(void);
269 void onint(int);
270 size_t pingerlen(void);
271 int pinger(void);
272 const char *pr_addr(struct sockaddr *, int);
273 void pr_icmph(struct icmp6_hdr *, u_char *);
274 void pr_iph(struct ip6_hdr *);
275 void pr_suptypes(struct icmp6_nodeinfo *, size_t);
276 void pr_nodeaddr(struct icmp6_nodeinfo *, int);
277 int myechoreply(const struct icmp6_hdr *);
278 int mynireply(const struct icmp6_nodeinfo *);
279 char *dnsdecode(const u_char **, const u_char *, const u_char *,
280 char *, size_t);
281 void pr_pack(u_char *, int, struct msghdr *);
282 void pr_exthdrs(struct msghdr *);
283 void pr_ip6opt(void *, size_t);
284 void pr_rthdr(void *, size_t);
285 int pr_bitrange(u_int32_t, int, int);
286 void pr_retip(struct ip6_hdr *, u_char *);
287 void summary(void);
288 void tvsub(struct timeval *, struct timeval *);
289 int setpolicy(int, char *);
290 char *nigroup(char *, int);
291 void usage(void);
292
293 int
main(int argc,char * argv[])294 main(int argc, char *argv[])
295 {
296 struct itimerval itimer;
297 struct sockaddr_in6 from;
298 #ifndef HAVE_ARC4RANDOM
299 struct timeval seed;
300 #endif
301 #ifdef HAVE_POLL_H
302 int timeout;
303 #else
304 struct timeval timeout, *tv;
305 #endif
306 struct addrinfo hints;
307 int cc, i;
308 int ch, hold, packlen, preload, optval, ret_ga;
309 int nig_oldmcprefix = -1;
310 u_char *datap;
311 char *e, *target, *ifname = NULL, *gateway = NULL;
312 int ip6optlen = 0;
313 struct cmsghdr *scmsgp = NULL;
314 /* For control (ancillary) data received from recvmsg() */
315 struct cmsghdr cm[CONTROLLEN];
316 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
317 u_long lsockbufsize;
318 int sockbufsize = 0;
319 #endif
320 int usepktinfo = 0;
321 struct in6_pktinfo *pktinfo = NULL;
322 #ifdef USE_RFC2292BIS
323 struct ip6_rthdr *rthdr = NULL;
324 #endif
325 #ifdef IPSEC_POLICY_IPSEC
326 char *policy_in = NULL;
327 char *policy_out = NULL;
328 #endif
329 double intval;
330 size_t rthlen;
331 #ifdef IPV6_USE_MIN_MTU
332 int mflag = 0;
333 #endif
334
335 /* just to be sure */
336 memset(&smsghdr, 0, sizeof(smsghdr));
337 memset(&smsgiov, 0, sizeof(smsgiov));
338
339 preload = 0;
340 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
341 #ifndef IPSEC
342 #define ADDOPTS
343 #else
344 #ifdef IPSEC_POLICY_IPSEC
345 #define ADDOPTS "P:"
346 #else
347 #define ADDOPTS "AE"
348 #endif /*IPSEC_POLICY_IPSEC*/
349 #endif
350 while ((ch = getopt(argc, argv,
351 "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwW" ADDOPTS)) != -1) {
352 #undef ADDOPTS
353 switch (ch) {
354 case 'a':
355 {
356 char *cp;
357
358 options &= ~F_NOUSERDATA;
359 options |= F_NODEADDR;
360 for (cp = optarg; *cp != '\0'; cp++) {
361 switch (*cp) {
362 case 'a':
363 naflags |= NI_NODEADDR_FLAG_ALL;
364 break;
365 case 'c':
366 case 'C':
367 naflags |= NI_NODEADDR_FLAG_COMPAT;
368 break;
369 case 'l':
370 case 'L':
371 naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
372 break;
373 case 's':
374 case 'S':
375 naflags |= NI_NODEADDR_FLAG_SITELOCAL;
376 break;
377 case 'g':
378 case 'G':
379 naflags |= NI_NODEADDR_FLAG_GLOBAL;
380 break;
381 case 'A': /* experimental. not in the spec */
382 #ifdef NI_NODEADDR_FLAG_ANYCAST
383 naflags |= NI_NODEADDR_FLAG_ANYCAST;
384 break;
385 #else
386 errx(1,
387 "-a A is not supported on the platform");
388 /*NOTREACHED*/
389 #endif
390 default:
391 usage();
392 /*NOTREACHED*/
393 }
394 }
395 break;
396 }
397 case 'b':
398 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
399 errno = 0;
400 e = NULL;
401 lsockbufsize = strtoul(optarg, &e, 10);
402 sockbufsize = lsockbufsize;
403 if (errno || !*optarg || *e ||
404 sockbufsize != lsockbufsize)
405 errx(1, "invalid socket buffer size");
406 #else
407 errx(1,
408 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
409 #endif
410 break;
411 case 'c':
412 npackets = strtol(optarg, &e, 10);
413 if (npackets <= 0 || *optarg == '\0' || *e != '\0')
414 errx(1,
415 "illegal number of packets -- %s", optarg);
416 break;
417 case 'D':
418 options |= F_DONTFRAG;
419 break;
420 case 'd':
421 options |= F_SO_DEBUG;
422 break;
423 case 'f':
424 if (getuid()) {
425 errno = EPERM;
426 errx(1, "Must be superuser to flood ping");
427 }
428 options |= F_FLOOD;
429 setbuf(stdout, (char *)NULL);
430 break;
431 case 'g':
432 gateway = optarg;
433 break;
434 case 'H':
435 options |= F_HOSTNAME;
436 break;
437 case 'h': /* hoplimit */
438 hoplimit = strtol(optarg, &e, 10);
439 if (*optarg == '\0' || *e != '\0')
440 errx(1, "illegal hoplimit %s", optarg);
441 if (255 < hoplimit || hoplimit < -1)
442 errx(1,
443 "illegal hoplimit -- %s", optarg);
444 break;
445 case 'I':
446 ifname = optarg;
447 options |= F_INTERFACE;
448 #ifndef USE_SIN6_SCOPE_ID
449 usepktinfo++;
450 #endif
451 break;
452 case 'i': /* wait between sending packets */
453 intval = strtod(optarg, &e);
454 if (*optarg == '\0' || *e != '\0')
455 errx(1, "illegal timing interval %s", optarg);
456 if (intval < 1 && getuid()) {
457 errx(1, "%s: only root may use interval < 1s",
458 strerror(EPERM));
459 }
460 interval.tv_sec = (long)intval;
461 interval.tv_usec =
462 (long)((intval - interval.tv_sec) * 1000000);
463 if (interval.tv_sec < 0)
464 errx(1, "illegal timing interval %s", optarg);
465 /* less than 1/hz does not make sense */
466 if (interval.tv_sec == 0 && interval.tv_usec < 1) {
467 warnx("too small interval, raised to .000001");
468 interval.tv_usec = 1;
469 }
470 options |= F_INTERVAL;
471 break;
472 case 'l':
473 if (getuid()) {
474 errno = EPERM;
475 errx(1, "Must be superuser to preload");
476 }
477 preload = strtol(optarg, &e, 10);
478 if (preload < 0 || *optarg == '\0' || *e != '\0')
479 errx(1, "illegal preload value -- %s", optarg);
480 break;
481 case 'm':
482 #ifdef IPV6_USE_MIN_MTU
483 mflag++;
484 break;
485 #else
486 errx(1, "-%c is not supported on this platform", ch);
487 /*NOTREACHED*/
488 #endif
489 case 'n':
490 options &= ~F_HOSTNAME;
491 break;
492 case 'N':
493 options |= F_NIGROUP;
494 nig_oldmcprefix++;
495 break;
496 case 'o':
497 options |= F_ONCE;
498 break;
499 case 'p': /* fill buffer with user pattern */
500 options |= F_PINGFILLED;
501 fill((char *)datap, optarg);
502 break;
503 case 'q':
504 options |= F_QUIET;
505 break;
506 case 'r':
507 options |= F_AUDIBLE;
508 break;
509 case 'R':
510 options |= F_MISSED;
511 break;
512 case 'S':
513 memset(&hints, 0, sizeof(struct addrinfo));
514 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
515 hints.ai_family = AF_INET6;
516 hints.ai_socktype = SOCK_RAW;
517 hints.ai_protocol = IPPROTO_ICMPV6;
518
519 ret_ga = getaddrinfo(optarg, NULL, &hints, &res);
520 if (ret_ga) {
521 errx(1, "invalid source address: %s",
522 gai_strerror(ret_ga));
523 }
524 /*
525 * res->ai_family must be AF_INET6 and res->ai_addrlen
526 * must be sizeof(src).
527 */
528 memcpy(&src, res->ai_addr, res->ai_addrlen);
529 srclen = res->ai_addrlen;
530 freeaddrinfo(res);
531 res = NULL;
532 options |= F_SRCADDR;
533 break;
534 case 's': /* size of packet to send */
535 datalen = strtol(optarg, &e, 10);
536 if (datalen <= 0 || *optarg == '\0' || *e != '\0')
537 errx(1, "illegal datalen value -- %s", optarg);
538 if (datalen > MAXDATALEN) {
539 errx(1,
540 "datalen value too large, maximum is %d",
541 MAXDATALEN);
542 }
543 break;
544 case 't':
545 options &= ~F_NOUSERDATA;
546 options |= F_SUPTYPES;
547 break;
548 case 'v':
549 options |= F_VERBOSE;
550 break;
551 case 'w':
552 options &= ~F_NOUSERDATA;
553 options |= F_FQDN;
554 break;
555 case 'W':
556 options &= ~F_NOUSERDATA;
557 options |= F_FQDNOLD;
558 break;
559 #ifdef IPSEC
560 #ifdef IPSEC_POLICY_IPSEC
561 case 'P':
562 options |= F_POLICY;
563 if (!strncmp("in", optarg, 2)) {
564 if ((policy_in = strdup(optarg)) == NULL)
565 errx(1, "strdup");
566 } else if (!strncmp("out", optarg, 3)) {
567 if ((policy_out = strdup(optarg)) == NULL)
568 errx(1, "strdup");
569 } else
570 errx(1, "invalid security policy");
571 break;
572 #else
573 case 'A':
574 options |= F_AUTHHDR;
575 break;
576 case 'E':
577 options |= F_ENCRYPT;
578 break;
579 #endif /*IPSEC_POLICY_IPSEC*/
580 #endif /*IPSEC*/
581 default:
582 usage();
583 /*NOTREACHED*/
584 }
585 }
586
587 argc -= optind;
588 argv += optind;
589
590 if (argc < 1) {
591 usage();
592 /*NOTREACHED*/
593 }
594
595 if (argc > 1) {
596 #ifdef IPV6_RECVRTHDR /* 2292bis */
597 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
598 argc - 1));
599 #else /* RFC2292 */
600 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
601 #endif
602 if (rthlen == 0) {
603 errx(1, "too many intermediate hops");
604 /*NOTREACHED*/
605 }
606 ip6optlen += rthlen;
607 }
608
609 if (options & F_NIGROUP) {
610 target = nigroup(argv[argc - 1], nig_oldmcprefix);
611 if (target == NULL) {
612 usage();
613 /*NOTREACHED*/
614 }
615 } else
616 target = argv[argc - 1];
617
618 /* getaddrinfo */
619 memset(&hints, 0, sizeof(struct addrinfo));
620 hints.ai_flags = AI_CANONNAME;
621 hints.ai_family = AF_INET6;
622 hints.ai_socktype = SOCK_RAW;
623 hints.ai_protocol = IPPROTO_ICMPV6;
624
625 ret_ga = getaddrinfo(target, NULL, &hints, &res);
626 if (ret_ga)
627 errx(1, "%s", gai_strerror(ret_ga));
628 if (res->ai_canonname)
629 hostname = res->ai_canonname;
630 else
631 hostname = target;
632
633 if (!res->ai_addr)
634 errx(1, "getaddrinfo failed");
635
636 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
637
638 if ((s = socket(res->ai_family, res->ai_socktype,
639 res->ai_protocol)) < 0)
640 err(1, "socket");
641
642 /* set the source address if specified. */
643 if ((options & F_SRCADDR) &&
644 bind(s, (struct sockaddr *)&src, srclen) != 0) {
645 err(1, "bind");
646 }
647
648 /* set the gateway (next hop) if specified */
649 if (gateway) {
650 struct addrinfo ghints, *gres;
651 int error;
652
653 memset(&ghints, 0, sizeof(ghints));
654 ghints.ai_family = AF_INET6;
655 ghints.ai_socktype = SOCK_RAW;
656 ghints.ai_protocol = IPPROTO_ICMPV6;
657
658 error = getaddrinfo(gateway, NULL, &hints, &gres);
659 if (error) {
660 errx(1, "getaddrinfo for the gateway %s: %s",
661 gateway, gai_strerror(error));
662 }
663 if (gres->ai_next && (options & F_VERBOSE))
664 warnx("gateway resolves to multiple addresses");
665
666 if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP,
667 gres->ai_addr, gres->ai_addrlen)) {
668 err(1, "setsockopt(IPV6_NEXTHOP)");
669 }
670
671 freeaddrinfo(gres);
672 }
673
674 /*
675 * let the kerel pass extension headers of incoming packets,
676 * for privileged socket options
677 */
678 if ((options & F_VERBOSE) != 0) {
679 int opton = 1;
680
681 #ifdef IPV6_RECVHOPOPTS
682 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
683 sizeof(opton)))
684 err(1, "setsockopt(IPV6_RECVHOPOPTS)");
685 #else /* old adv. API */
686 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
687 sizeof(opton)))
688 err(1, "setsockopt(IPV6_HOPOPTS)");
689 #endif
690 #ifdef IPV6_RECVDSTOPTS
691 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
692 sizeof(opton)))
693 err(1, "setsockopt(IPV6_RECVDSTOPTS)");
694 #else /* old adv. API */
695 if (setsockopt(s, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
696 sizeof(opton)))
697 err(1, "setsockopt(IPV6_DSTOPTS)");
698 #endif
699 #ifdef IPV6_RECVRTHDRDSTOPTS
700 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
701 sizeof(opton)))
702 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
703 #endif
704 }
705
706 /* revoke root privilege */
707 seteuid(getuid());
708 setuid(getuid());
709
710 if ((options & F_FLOOD) && (options & F_INTERVAL))
711 errx(1, "-f and -i incompatible options");
712
713 if ((options & F_NOUSERDATA) == 0) {
714 if (datalen >= sizeof(struct tv32)) {
715 /* we can time transfer */
716 timing = 1;
717 } else
718 timing = 0;
719 /* in F_VERBOSE case, we may get non-echoreply packets*/
720 if (options & F_VERBOSE)
721 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
722 else
723 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
724 } else {
725 /* suppress timing for node information query */
726 timing = 0;
727 datalen = 2048;
728 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
729 }
730
731 if (!(packet = (u_char *)malloc((u_int)packlen)))
732 err(1, "Unable to allocate packet");
733 if (!(options & F_PINGFILLED))
734 for (i = ICMP6ECHOLEN; i < packlen; ++i)
735 *datap++ = i;
736
737 ident = getpid() & 0xFFFF;
738 #ifndef HAVE_ARC4RANDOM
739 gettimeofday(&seed, NULL);
740 srand((unsigned int)(seed.tv_sec ^ seed.tv_usec ^ (long)ident));
741 memset(nonce, 0, sizeof(nonce));
742 for (i = 0; i < sizeof(nonce); i += sizeof(int))
743 *((int *)&nonce[i]) = rand();
744 #else
745 memset(nonce, 0, sizeof(nonce));
746 for (i = 0; i < sizeof(nonce); i += sizeof(u_int32_t))
747 *((u_int32_t *)&nonce[i]) = arc4random();
748 #endif
749 optval = 1;
750 if (options & F_DONTFRAG)
751 if (setsockopt(s, IPPROTO_IPV6, IPV6_DONTFRAG,
752 &optval, sizeof(optval)) == -1)
753 err(1, "IPV6_DONTFRAG");
754 hold = 1;
755
756 if (options & F_SO_DEBUG)
757 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
758 sizeof(hold));
759 optval = IPV6_DEFHLIM;
760 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
761 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
762 &optval, sizeof(optval)) == -1)
763 err(1, "IPV6_MULTICAST_HOPS");
764 #ifdef IPV6_USE_MIN_MTU
765 if (mflag != 1) {
766 optval = mflag > 1 ? 0 : 1;
767
768 if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
769 &optval, sizeof(optval)) == -1)
770 err(1, "setsockopt(IPV6_USE_MIN_MTU)");
771 }
772 #ifdef IPV6_RECVPATHMTU
773 else {
774 optval = 1;
775 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU,
776 &optval, sizeof(optval)) == -1)
777 err(1, "setsockopt(IPV6_RECVPATHMTU)");
778 }
779 #endif /* IPV6_RECVPATHMTU */
780 #endif /* IPV6_USE_MIN_MTU */
781
782 #ifdef IPSEC
783 #ifdef IPSEC_POLICY_IPSEC
784 if (options & F_POLICY) {
785 if (setpolicy(s, policy_in) < 0)
786 errx(1, "%s", ipsec_strerror());
787 if (setpolicy(s, policy_out) < 0)
788 errx(1, "%s", ipsec_strerror());
789 }
790 #else
791 if (options & F_AUTHHDR) {
792 optval = IPSEC_LEVEL_REQUIRE;
793 #ifdef IPV6_AUTH_TRANS_LEVEL
794 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
795 &optval, sizeof(optval)) == -1)
796 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
797 #else /* old def */
798 if (setsockopt(s, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
799 &optval, sizeof(optval)) == -1)
800 err(1, "setsockopt(IPV6_AUTH_LEVEL)");
801 #endif
802 }
803 if (options & F_ENCRYPT) {
804 optval = IPSEC_LEVEL_REQUIRE;
805 if (setsockopt(s, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
806 &optval, sizeof(optval)) == -1)
807 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
808 }
809 #endif /*IPSEC_POLICY_IPSEC*/
810 #endif
811
812 #ifdef ICMP6_FILTER
813 {
814 struct icmp6_filter filt;
815 if (!(options & F_VERBOSE)) {
816 ICMP6_FILTER_SETBLOCKALL(&filt);
817 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
818 (options & F_NODEADDR) || (options & F_SUPTYPES))
819 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
820 else
821 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
822 } else {
823 ICMP6_FILTER_SETPASSALL(&filt);
824 }
825 if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
826 sizeof(filt)) < 0)
827 err(1, "setsockopt(ICMP6_FILTER)");
828 }
829 #endif /*ICMP6_FILTER*/
830
831 /* let the kerel pass extension headers of incoming packets */
832 if ((options & F_VERBOSE) != 0) {
833 int opton = 1;
834
835 #ifdef IPV6_RECVRTHDR
836 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
837 sizeof(opton)))
838 err(1, "setsockopt(IPV6_RECVRTHDR)");
839 #else /* old adv. API */
840 if (setsockopt(s, IPPROTO_IPV6, IPV6_RTHDR, &opton,
841 sizeof(opton)))
842 err(1, "setsockopt(IPV6_RTHDR)");
843 #endif
844 }
845
846 /*
847 optval = 1;
848 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
849 if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
850 &optval, sizeof(optval)) == -1)
851 err(1, "IPV6_MULTICAST_LOOP");
852 */
853
854 /* Specify the outgoing interface and/or the source address */
855 if (usepktinfo)
856 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
857
858 if (hoplimit != -1)
859 ip6optlen += CMSG_SPACE(sizeof(int));
860
861 /* set IP6 packet options */
862 if (ip6optlen) {
863 if ((scmsg = (char *)malloc(ip6optlen)) == 0)
864 errx(1, "can't allocate enough memory");
865 smsghdr.msg_control = (caddr_t)scmsg;
866 smsghdr.msg_controllen = ip6optlen;
867 scmsgp = (struct cmsghdr *)scmsg;
868 }
869 if (usepktinfo) {
870 pktinfo = (struct in6_pktinfo *)(CMSG_DATA(scmsgp));
871 memset(pktinfo, 0, sizeof(*pktinfo));
872 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
873 scmsgp->cmsg_level = IPPROTO_IPV6;
874 scmsgp->cmsg_type = IPV6_PKTINFO;
875 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
876 }
877
878 /* set the outgoing interface */
879 if (ifname) {
880 #ifndef USE_SIN6_SCOPE_ID
881 /* pktinfo must have already been allocated */
882 if ((pktinfo->ipi6_ifindex = if_nametoindex(ifname)) == 0)
883 errx(1, "%s: invalid interface name", ifname);
884 #else
885 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
886 errx(1, "%s: invalid interface name", ifname);
887 #endif
888 }
889 if (hoplimit != -1) {
890 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
891 scmsgp->cmsg_level = IPPROTO_IPV6;
892 scmsgp->cmsg_type = IPV6_HOPLIMIT;
893 *(int *)(CMSG_DATA(scmsgp)) = hoplimit;
894
895 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
896 }
897
898 if (argc > 1) { /* some intermediate addrs are specified */
899 int hops, error;
900 #ifdef USE_RFC2292BIS
901 int rthdrlen;
902 #endif
903
904 #ifdef USE_RFC2292BIS
905 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
906 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
907 scmsgp->cmsg_level = IPPROTO_IPV6;
908 scmsgp->cmsg_type = IPV6_RTHDR;
909 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
910 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
911 IPV6_RTHDR_TYPE_0, argc - 1);
912 if (rthdr == NULL)
913 errx(1, "can't initialize rthdr");
914 #else /* old advanced API */
915 if ((scmsgp = (struct cmsghdr *)inet6_rthdr_init(scmsgp,
916 IPV6_RTHDR_TYPE_0)) == 0)
917 errx(1, "can't initialize rthdr");
918 #endif /* USE_RFC2292BIS */
919
920 for (hops = 0; hops < argc - 1; hops++) {
921 struct addrinfo *iaip;
922
923 if ((error = getaddrinfo(argv[hops], NULL, &hints,
924 &iaip)))
925 errx(1, "%s", gai_strerror(error));
926 if (SIN6(iaip->ai_addr)->sin6_family != AF_INET6)
927 errx(1,
928 "bad addr family of an intermediate addr");
929
930 #ifdef USE_RFC2292BIS
931 if (inet6_rth_add(rthdr,
932 &(SIN6(iaip->ai_addr))->sin6_addr))
933 errx(1, "can't add an intermediate node");
934 #else /* old advanced API */
935 if (inet6_rthdr_add(scmsgp,
936 &(SIN6(iaip->ai_addr))->sin6_addr,
937 IPV6_RTHDR_LOOSE))
938 errx(1, "can't add an intermediate node");
939 #endif /* USE_RFC2292BIS */
940 freeaddrinfo(iaip);
941 }
942
943 #ifndef USE_RFC2292BIS
944 if (inet6_rthdr_lasthop(scmsgp, IPV6_RTHDR_LOOSE))
945 errx(1, "can't set the last flag");
946 #endif
947
948 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
949 }
950
951 if (!(options & F_SRCADDR)) {
952 /*
953 * get the source address. XXX since we revoked the root
954 * privilege, we cannot use a raw socket for this.
955 */
956 int dummy;
957 socklen_t len = sizeof(src);
958
959 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
960 err(1, "UDP socket");
961
962 src.sin6_family = AF_INET6;
963 src.sin6_addr = dst.sin6_addr;
964 src.sin6_port = ntohs(DUMMY_PORT);
965 src.sin6_scope_id = dst.sin6_scope_id;
966
967 #ifdef USE_RFC2292BIS
968 if (pktinfo &&
969 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
970 (void *)pktinfo, sizeof(*pktinfo)))
971 err(1, "UDP setsockopt(IPV6_PKTINFO)");
972
973 if (hoplimit != -1 &&
974 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
975 (void *)&hoplimit, sizeof(hoplimit)))
976 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
977
978 if (hoplimit != -1 &&
979 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
980 (void *)&hoplimit, sizeof(hoplimit)))
981 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
982
983 if (rthdr &&
984 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
985 (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
986 err(1, "UDP setsockopt(IPV6_RTHDR)");
987 #else /* old advanced API */
988 if (smsghdr.msg_control &&
989 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTOPTIONS,
990 (void *)smsghdr.msg_control, smsghdr.msg_controllen))
991 err(1, "UDP setsockopt(IPV6_PKTOPTIONS)");
992 #endif
993
994 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
995 err(1, "UDP connect");
996
997 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
998 err(1, "getsockname");
999
1000 close(dummy);
1001 }
1002
1003 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
1004 if (sockbufsize) {
1005 if (datalen > sockbufsize)
1006 warnx("you need -b to increase socket buffer size");
1007 if (setsockopt(s, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1008 sizeof(sockbufsize)) < 0)
1009 err(1, "setsockopt(SO_SNDBUF)");
1010 if (setsockopt(s, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1011 sizeof(sockbufsize)) < 0)
1012 err(1, "setsockopt(SO_RCVBUF)");
1013 }
1014 else {
1015 if (datalen > 8 * 1024) /*XXX*/
1016 warnx("you need -b to increase socket buffer size");
1017 /*
1018 * When pinging the broadcast address, you can get a lot of
1019 * answers. Doing something so evil is useful if you are trying
1020 * to stress the ethernet, or just want to fill the arp cache
1021 * to get some stuff for /etc/ethers.
1022 */
1023 hold = 48 * 1024;
1024 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1025 sizeof(hold));
1026 }
1027 #endif
1028
1029 optval = 1;
1030 #ifndef USE_SIN6_SCOPE_ID
1031 #ifdef IPV6_RECVPKTINFO
1032 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1033 sizeof(optval)) < 0)
1034 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1035 #else /* old adv. API */
1036 if (setsockopt(s, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1037 sizeof(optval)) < 0)
1038 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1039 #endif
1040 #endif /* USE_SIN6_SCOPE_ID */
1041 #ifdef IPV6_RECVHOPLIMIT
1042 if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1043 sizeof(optval)) < 0)
1044 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1045 #else /* old adv. API */
1046 if (setsockopt(s, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1047 sizeof(optval)) < 0)
1048 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1049 #endif
1050
1051 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1052 (unsigned long)(pingerlen() - 8));
1053 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1054 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1055
1056 while (preload--) /* Fire off them quickies. */
1057 (void)pinger();
1058
1059 (void)signal(SIGINT, onsignal);
1060 #ifdef SIGINFO
1061 (void)signal(SIGINFO, onsignal);
1062 #endif
1063
1064 if ((options & F_FLOOD) == 0) {
1065 (void)signal(SIGALRM, onsignal);
1066 itimer.it_interval = interval;
1067 itimer.it_value = interval;
1068 (void)setitimer(ITIMER_REAL, &itimer, NULL);
1069 if (ntransmitted == 0)
1070 retransmit();
1071 }
1072
1073 #ifndef HAVE_POLL_H
1074 fdmasks = howmany(s + 1, NFDBITS) * sizeof(fd_mask);
1075 if ((fdmaskp = malloc(fdmasks)) == NULL)
1076 err(1, "malloc");
1077 #endif
1078
1079 seenalrm = seenint = 0;
1080 #ifdef SIGINFO
1081 seeninfo = 0;
1082 #endif
1083
1084 for (;;) {
1085 struct msghdr m;
1086 struct iovec iov[2];
1087
1088 /* signal handling */
1089 if (seenalrm) {
1090 /* last packet sent, timeout reached? */
1091 if (npackets && ntransmitted >= npackets)
1092 break;
1093 retransmit();
1094 seenalrm = 0;
1095 continue;
1096 }
1097 if (seenint) {
1098 onint(SIGINT);
1099 seenint = 0;
1100 continue;
1101 }
1102 #ifdef SIGINFO
1103 if (seeninfo) {
1104 summary();
1105 seeninfo = 0;
1106 continue;
1107 }
1108 #endif
1109
1110 if (options & F_FLOOD) {
1111 (void)pinger();
1112 #ifdef HAVE_POLL_H
1113 timeout = 10;
1114 #else
1115 timeout.tv_sec = 0;
1116 timeout.tv_usec = 10000;
1117 tv = &timeout;
1118 #endif
1119 } else {
1120 #ifdef HAVE_POLL_H
1121 timeout = INFTIM;
1122 #else
1123 tv = NULL;
1124 #endif
1125 }
1126 #ifdef HAVE_POLL_H
1127 fdmaskp[0].fd = s;
1128 fdmaskp[0].events = POLLIN;
1129 cc = poll(fdmaskp, 1, timeout);
1130 #else
1131 memset(fdmaskp, 0, fdmasks);
1132 FD_SET(s, fdmaskp);
1133 cc = select(s + 1, fdmaskp, NULL, NULL, tv);
1134 #endif
1135 if (cc < 0) {
1136 if (errno != EINTR) {
1137 #ifdef HAVE_POLL_H
1138 warn("poll");
1139 #else
1140 warn("select");
1141 #endif
1142 sleep(1);
1143 }
1144 continue;
1145 } else if (cc == 0)
1146 continue;
1147
1148 m.msg_name = (caddr_t)&from;
1149 m.msg_namelen = sizeof(from);
1150 memset(&iov, 0, sizeof(iov));
1151 iov[0].iov_base = (caddr_t)packet;
1152 iov[0].iov_len = packlen;
1153 m.msg_iov = iov;
1154 m.msg_iovlen = 1;
1155 memset(cm, 0, CONTROLLEN);
1156 m.msg_control = (void *)cm;
1157 m.msg_controllen = CONTROLLEN;
1158
1159 cc = recvmsg(s, &m, 0);
1160 if (cc < 0) {
1161 if (errno != EINTR) {
1162 warn("recvmsg");
1163 sleep(1);
1164 }
1165 continue;
1166 } else if (cc == 0) {
1167 int mtu;
1168
1169 /*
1170 * receive control messages only. Process the
1171 * exceptions (currently the only possiblity is
1172 * a path MTU notification.)
1173 */
1174 if ((mtu = get_pathmtu(&m)) > 0) {
1175 if ((options & F_VERBOSE) != 0) {
1176 printf("new path MTU (%d) is "
1177 "notified\n", mtu);
1178 }
1179 }
1180 continue;
1181 } else {
1182 /*
1183 * an ICMPv6 message (probably an echoreply) arrived.
1184 */
1185 pr_pack(packet, cc, &m);
1186 }
1187 if (((options & F_ONCE) != 0 && nreceived > 0) ||
1188 (npackets > 0 && nreceived >= npackets))
1189 break;
1190 if (ntransmitted - nreceived - 1 > nmissedmax) {
1191 nmissedmax = ntransmitted - nreceived - 1;
1192 if (options & F_MISSED)
1193 (void)write(STDOUT_FILENO, &BBELL, 1);
1194 }
1195 }
1196 summary();
1197
1198 if (res != NULL)
1199 freeaddrinfo(res);
1200
1201 if(packet != NULL)
1202 free(packet);
1203
1204 #ifndef HAVE_POLL_H
1205 if(fdmaskp != NULL)
1206 free(fdmaskp);
1207 #endif
1208
1209 exit(nreceived == 0 ? 2 : 0);
1210 }
1211
1212 void
onsignal(int sig)1213 onsignal(int sig)
1214 {
1215
1216 switch (sig) {
1217 case SIGALRM:
1218 seenalrm++;
1219 break;
1220 case SIGINT:
1221 seenint++;
1222 break;
1223 #ifdef SIGINFO
1224 case SIGINFO:
1225 seeninfo++;
1226 break;
1227 #endif
1228 }
1229 }
1230
1231 /*
1232 * retransmit --
1233 * This routine transmits another ping6.
1234 */
1235 void
retransmit(void)1236 retransmit(void)
1237 {
1238 struct itimerval itimer;
1239
1240 if (pinger() == 0)
1241 return;
1242
1243 /*
1244 * If we're not transmitting any more packets, change the timer
1245 * to wait two round-trip times if we've received any packets or
1246 * ten seconds if we haven't.
1247 */
1248 #define MAXWAIT 10
1249 if (nreceived) {
1250 itimer.it_value.tv_sec = 2 * tmax / 1000;
1251 if (itimer.it_value.tv_sec == 0)
1252 itimer.it_value.tv_sec = 1;
1253 } else
1254 itimer.it_value.tv_sec = MAXWAIT;
1255 itimer.it_interval.tv_sec = 0;
1256 itimer.it_interval.tv_usec = 0;
1257 itimer.it_value.tv_usec = 0;
1258
1259 (void)signal(SIGALRM, onsignal);
1260 (void)setitimer(ITIMER_REAL, &itimer, NULL);
1261 }
1262
1263 /*
1264 * pinger --
1265 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1266 * will be added on by the kernel. The ID field is our UNIX process ID,
1267 * and the sequence number is an ascending integer. The first 8 bytes
1268 * of the data portion are used to hold a UNIX "timeval" struct in VAX
1269 * byte-order, to compute the round-trip time.
1270 */
1271 size_t
pingerlen(void)1272 pingerlen(void)
1273 {
1274 size_t l;
1275
1276 if (options & F_FQDN)
1277 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1278 else if (options & F_FQDNOLD)
1279 l = ICMP6_NIQLEN;
1280 else if (options & F_NODEADDR)
1281 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1282 else if (options & F_SUPTYPES)
1283 l = ICMP6_NIQLEN;
1284 else
1285 l = ICMP6ECHOLEN + datalen;
1286
1287 return l;
1288 }
1289
1290 int
pinger(void)1291 pinger(void)
1292 {
1293 struct icmp6_hdr *icp;
1294 struct iovec iov[2];
1295 int i, cc;
1296 struct icmp6_nodeinfo *nip;
1297 int seq;
1298
1299 if (npackets && ntransmitted >= npackets)
1300 return(-1); /* no more transmission */
1301
1302 icp = (struct icmp6_hdr *)outpack;
1303 nip = (struct icmp6_nodeinfo *)outpack;
1304 memset(icp, 0, sizeof(*icp));
1305 icp->icmp6_cksum = 0;
1306 seq = ntransmitted++;
1307 CLR(seq % mx_dup_ck);
1308
1309 if (options & F_FQDN) {
1310 icp->icmp6_type = ICMP6_NI_QUERY;
1311 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1312 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1313 nip->ni_flags = htons(0);
1314
1315 memcpy(nip->icmp6_ni_nonce, nonce,
1316 sizeof(nip->icmp6_ni_nonce));
1317 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1318
1319 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1320 sizeof(dst.sin6_addr));
1321 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1322 datalen = 0;
1323 } else if (options & F_FQDNOLD) {
1324 /* packet format in 03 draft - no Subject data on queries */
1325 icp->icmp6_type = ICMP6_NI_QUERY;
1326 icp->icmp6_code = 0; /* code field is always 0 */
1327 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1328 nip->ni_flags = htons(0);
1329
1330 memcpy(nip->icmp6_ni_nonce, nonce,
1331 sizeof(nip->icmp6_ni_nonce));
1332 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1333
1334 cc = ICMP6_NIQLEN;
1335 datalen = 0;
1336 } else if (options & F_NODEADDR) {
1337 icp->icmp6_type = ICMP6_NI_QUERY;
1338 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1339 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1340 nip->ni_flags = naflags;
1341
1342 memcpy(nip->icmp6_ni_nonce, nonce,
1343 sizeof(nip->icmp6_ni_nonce));
1344 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1345
1346 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1347 sizeof(dst.sin6_addr));
1348 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1349 datalen = 0;
1350 } else if (options & F_SUPTYPES) {
1351 icp->icmp6_type = ICMP6_NI_QUERY;
1352 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/
1353 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1354 /* we support compressed bitmap */
1355 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1356
1357 memcpy(nip->icmp6_ni_nonce, nonce,
1358 sizeof(nip->icmp6_ni_nonce));
1359 *(u_int16_t *)nip->icmp6_ni_nonce = ntohs(seq);
1360 cc = ICMP6_NIQLEN;
1361 datalen = 0;
1362 } else {
1363 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1364 icp->icmp6_code = 0;
1365 icp->icmp6_id = htons(ident);
1366 icp->icmp6_seq = ntohs(seq);
1367 if (timing) {
1368 struct timeval tv;
1369 struct tv32 *tv32;
1370 (void)gettimeofday(&tv, NULL);
1371 tv32 = (struct tv32 *)&outpack[ICMP6ECHOLEN];
1372 tv32->tv32_sec = htonl(tv.tv_sec);
1373 tv32->tv32_usec = htonl(tv.tv_usec);
1374 }
1375 cc = ICMP6ECHOLEN + datalen;
1376 }
1377
1378 #ifdef DIAGNOSTIC
1379 if (pingerlen() != cc)
1380 errx(1, "internal error; length mismatch");
1381 #endif
1382
1383 smsghdr.msg_name = (caddr_t)&dst;
1384 smsghdr.msg_namelen = sizeof(dst);
1385 memset(&iov, 0, sizeof(iov));
1386 iov[0].iov_base = (caddr_t)outpack;
1387 iov[0].iov_len = cc;
1388 smsghdr.msg_iov = iov;
1389 smsghdr.msg_iovlen = 1;
1390
1391 i = sendmsg(s, &smsghdr, 0);
1392
1393 if (i < 0 || i != cc) {
1394 if (i < 0)
1395 warn("sendmsg");
1396 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1397 hostname, cc, i);
1398 }
1399 if (!(options & F_QUIET) && options & F_FLOOD)
1400 (void)write(STDOUT_FILENO, &DOT, 1);
1401
1402 return(0);
1403 }
1404
1405 int
myechoreply(const struct icmp6_hdr * icp)1406 myechoreply(const struct icmp6_hdr *icp)
1407 {
1408 if (ntohs(icp->icmp6_id) == ident)
1409 return 1;
1410 else
1411 return 0;
1412 }
1413
1414 int
mynireply(const struct icmp6_nodeinfo * nip)1415 mynireply(const struct icmp6_nodeinfo *nip)
1416 {
1417 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1418 nonce + sizeof(u_int16_t),
1419 sizeof(nonce) - sizeof(u_int16_t)) == 0)
1420 return 1;
1421 else
1422 return 0;
1423 }
1424
1425 char *
dnsdecode(const u_char ** sp,const u_char * ep,const u_char * base,char * buf,size_t bufsiz)1426 dnsdecode(const u_char **sp, const u_char *ep, const u_char *base, char *buf,
1427 size_t bufsiz)
1428 /*base for compressed name*/
1429 {
1430 int i;
1431 const u_char *cp;
1432 char cresult[MAXDNAME + 1];
1433 const u_char *comp;
1434 int l;
1435
1436 cp = *sp;
1437 *buf = '\0';
1438
1439 if (cp >= ep)
1440 return NULL;
1441 while (cp < ep) {
1442 i = *cp;
1443 if (i == 0 || cp != *sp) {
1444 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1445 return NULL; /*result overrun*/
1446 }
1447 if (i == 0)
1448 break;
1449 cp++;
1450
1451 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1452 /* DNS compression */
1453 if (!base)
1454 return NULL;
1455
1456 comp = base + (i & 0x3f);
1457 if (dnsdecode(&comp, cp, base, cresult,
1458 sizeof(cresult)) == NULL)
1459 return NULL;
1460 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1461 return NULL; /*result overrun*/
1462 break;
1463 } else if ((i & 0x3f) == i) {
1464 if (i > ep - cp)
1465 return NULL; /*source overrun*/
1466 while (i-- > 0 && cp < ep) {
1467 l = snprintf(cresult, sizeof(cresult),
1468 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1469 if (l >= sizeof(cresult) || l < 0)
1470 return NULL;
1471 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1472 return NULL; /*result overrun*/
1473 cp++;
1474 }
1475 } else
1476 return NULL; /*invalid label*/
1477 }
1478 if (i != 0)
1479 return NULL; /*not terminated*/
1480 cp++;
1481 *sp = cp;
1482 return buf;
1483 }
1484
1485 /*
1486 * pr_pack --
1487 * Print out the packet, if it came from us. This logic is necessary
1488 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1489 * which arrive ('tis only fair). This permits multiple copies of this
1490 * program to be run without having intermingled output (or statistics!).
1491 */
1492 void
pr_pack(u_char * buf,int cc,struct msghdr * mhdr)1493 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1494 {
1495 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
1496 struct icmp6_hdr *icp;
1497 struct icmp6_nodeinfo *ni;
1498 int i;
1499 int hoplim;
1500 struct sockaddr *from;
1501 int fromlen;
1502 u_char *cp = NULL, *dp, *end = buf + cc;
1503 struct in6_pktinfo *pktinfo = NULL;
1504 struct timeval tv, tp;
1505 struct tv32 *tpp;
1506 double triptime = 0;
1507 int dupflag;
1508 size_t off;
1509 int oldfqdn;
1510 u_int16_t seq;
1511 char dnsname[MAXDNAME + 1];
1512
1513 (void)gettimeofday(&tv, NULL);
1514
1515 if (!mhdr || !mhdr->msg_name ||
1516 mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1517 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1518 if (options & F_VERBOSE)
1519 warnx("invalid peername");
1520 return;
1521 }
1522 from = (struct sockaddr *)mhdr->msg_name;
1523 fromlen = mhdr->msg_namelen;
1524 if (cc < sizeof(struct icmp6_hdr)) {
1525 if (options & F_VERBOSE)
1526 warnx("packet too short (%d bytes) from %s", cc,
1527 pr_addr(from, fromlen));
1528 return;
1529 }
1530 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1531 (options & F_VERBOSE) != 0)
1532 warnx("some control data discarded, insufficient buffer size");
1533 icp = (struct icmp6_hdr *)buf;
1534 ni = (struct icmp6_nodeinfo *)buf;
1535 off = 0;
1536
1537 if ((hoplim = get_hoplim(mhdr)) == -1) {
1538 warnx("failed to get receiving hop limit");
1539 return;
1540 }
1541 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1542 warnx("failed to get receiving packet information");
1543 return;
1544 }
1545
1546 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1547 seq = ntohs(icp->icmp6_seq);
1548 ++nreceived;
1549 if (timing) {
1550 tpp = (struct tv32 *)(icp + 1);
1551 tp.tv_sec = ntohl(tpp->tv32_sec);
1552 tp.tv_usec = ntohl(tpp->tv32_usec);
1553 tvsub(&tv, &tp);
1554 triptime = ((double)tv.tv_sec) * 1000.0 +
1555 ((double)tv.tv_usec) / 1000.0;
1556 tsum += triptime;
1557 tsumsq += triptime * triptime;
1558 if (triptime < tmin)
1559 tmin = triptime;
1560 if (triptime > tmax)
1561 tmax = triptime;
1562 }
1563
1564 if (TST(seq % mx_dup_ck)) {
1565 ++nrepeats;
1566 --nreceived;
1567 dupflag = 1;
1568 } else {
1569 SET(seq % mx_dup_ck);
1570 dupflag = 0;
1571 }
1572
1573 if (options & F_QUIET)
1574 return;
1575
1576 if (options & F_FLOOD)
1577 (void)write(STDOUT_FILENO, &BSPACE, 1);
1578 else {
1579 if (options & F_AUDIBLE)
1580 (void)write(STDOUT_FILENO, &BBELL, 1);
1581 (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1582 pr_addr(from, fromlen), seq);
1583 (void)printf(" hlim=%d", hoplim);
1584 if ((options & F_VERBOSE) != 0) {
1585 struct sockaddr_in6 dstsa;
1586
1587 memset(&dstsa, 0, sizeof(dstsa));
1588 dstsa.sin6_family = AF_INET6;
1589 dstsa.sin6_len = sizeof(dstsa);
1590 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1591 dstsa.sin6_addr = pktinfo->ipi6_addr;
1592 (void)printf(" dst=%s",
1593 pr_addr((struct sockaddr *)&dstsa,
1594 sizeof(dstsa)));
1595 }
1596 if (timing)
1597 (void)printf(" time=%.3f ms", triptime);
1598 if (dupflag)
1599 (void)printf("(DUP!)");
1600 /* check the data */
1601 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1602 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1603 for (i = 8; cp < end; ++i, ++cp, ++dp) {
1604 if (*cp != *dp) {
1605 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1606 break;
1607 }
1608 }
1609 }
1610 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1611 seq = ntohs(*(u_int16_t *)ni->icmp6_ni_nonce);
1612 ++nreceived;
1613 if (TST(seq % mx_dup_ck)) {
1614 ++nrepeats;
1615 --nreceived;
1616 dupflag = 1;
1617 } else {
1618 SET(seq % mx_dup_ck);
1619 dupflag = 0;
1620 }
1621
1622 if (options & F_QUIET)
1623 return;
1624
1625 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1626
1627 switch (ntohs(ni->ni_code)) {
1628 case ICMP6_NI_SUCCESS:
1629 break;
1630 case ICMP6_NI_REFUSED:
1631 printf("refused, type 0x%x", ntohs(ni->ni_type));
1632 goto fqdnend;
1633 case ICMP6_NI_UNKNOWN:
1634 printf("unknown, type 0x%x", ntohs(ni->ni_type));
1635 goto fqdnend;
1636 default:
1637 printf("unknown code 0x%x, type 0x%x",
1638 ntohs(ni->ni_code), ntohs(ni->ni_type));
1639 goto fqdnend;
1640 }
1641
1642 switch (ntohs(ni->ni_qtype)) {
1643 case NI_QTYPE_NOOP:
1644 printf("NodeInfo NOOP");
1645 break;
1646 case NI_QTYPE_SUPTYPES:
1647 pr_suptypes(ni, end - (u_char *)ni);
1648 break;
1649 case NI_QTYPE_NODEADDR:
1650 pr_nodeaddr(ni, end - (u_char *)ni);
1651 break;
1652 case NI_QTYPE_FQDN:
1653 default: /* XXX: for backward compatibility */
1654 cp = (u_char *)ni + ICMP6_NIRLEN;
1655 if (buf[off + ICMP6_NIRLEN] ==
1656 cc - off - ICMP6_NIRLEN - 1)
1657 oldfqdn = 1;
1658 else
1659 oldfqdn = 0;
1660 if (oldfqdn) {
1661 cp++; /* skip length */
1662 while (cp < end) {
1663 safeputc(*cp & 0xff);
1664 cp++;
1665 }
1666 } else {
1667 i = 0;
1668 while (cp < end) {
1669 if (dnsdecode((const u_char **)&cp, end,
1670 (const u_char *)(ni + 1), dnsname,
1671 sizeof(dnsname)) == NULL) {
1672 printf("???");
1673 break;
1674 }
1675 /*
1676 * name-lookup special handling for
1677 * truncated name
1678 */
1679 if (cp + 1 <= end && !*cp &&
1680 strlen(dnsname) > 0) {
1681 dnsname[strlen(dnsname) - 1] = '\0';
1682 cp++;
1683 }
1684 printf("%s%s", i > 0 ? "," : "",
1685 dnsname);
1686 }
1687 }
1688 if (options & F_VERBOSE) {
1689 int32_t ttl;
1690 int comma = 0;
1691
1692 (void)printf(" ("); /*)*/
1693
1694 switch (ni->ni_code) {
1695 case ICMP6_NI_REFUSED:
1696 (void)printf("refused");
1697 comma++;
1698 break;
1699 case ICMP6_NI_UNKNOWN:
1700 (void)printf("unknown qtype");
1701 comma++;
1702 break;
1703 }
1704
1705 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1706 /* case of refusion, unknown */
1707 /*(*/
1708 putchar(')');
1709 goto fqdnend;
1710 }
1711 ttl = (int32_t)ntohl(*(u_long *)&buf[off+ICMP6ECHOLEN+8]);
1712 if (comma)
1713 printf(",");
1714 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1715 (void)printf("TTL=%d:meaningless",
1716 (int)ttl);
1717 } else {
1718 if (ttl < 0) {
1719 (void)printf("TTL=%d:invalid",
1720 ttl);
1721 } else
1722 (void)printf("TTL=%d", ttl);
1723 }
1724 comma++;
1725
1726 if (oldfqdn) {
1727 if (comma)
1728 printf(",");
1729 printf("03 draft");
1730 comma++;
1731 } else {
1732 cp = (u_char *)ni + ICMP6_NIRLEN;
1733 if (cp == end) {
1734 if (comma)
1735 printf(",");
1736 printf("no name");
1737 comma++;
1738 }
1739 }
1740
1741 if (buf[off + ICMP6_NIRLEN] !=
1742 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1743 if (comma)
1744 printf(",");
1745 (void)printf("invalid namelen:%d/%lu",
1746 buf[off + ICMP6_NIRLEN],
1747 (u_long)cc - off - ICMP6_NIRLEN - 1);
1748 comma++;
1749 }
1750 /*(*/
1751 putchar(')');
1752 }
1753 fqdnend:
1754 ;
1755 }
1756 } else {
1757 /* We've got something other than an ECHOREPLY */
1758 if (!(options & F_VERBOSE))
1759 return;
1760 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1761 pr_icmph(icp, end);
1762 }
1763
1764 if (!(options & F_FLOOD)) {
1765 (void)putchar('\n');
1766 if (options & F_VERBOSE)
1767 pr_exthdrs(mhdr);
1768 (void)fflush(stdout);
1769 }
1770 #undef safeputc
1771 }
1772
1773 void
pr_exthdrs(struct msghdr * mhdr)1774 pr_exthdrs(struct msghdr *mhdr)
1775 {
1776 ssize_t bufsize;
1777 void *bufp;
1778 struct cmsghdr *cm;
1779
1780 bufsize = 0;
1781 bufp = mhdr->msg_control;
1782 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1783 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1784 if (cm->cmsg_level != IPPROTO_IPV6)
1785 continue;
1786
1787 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1788 if (bufsize <= 0)
1789 continue;
1790 switch (cm->cmsg_type) {
1791 case IPV6_HOPOPTS:
1792 printf(" HbH Options: ");
1793 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1794 break;
1795 case IPV6_DSTOPTS:
1796 #ifdef IPV6_RTHDRDSTOPTS
1797 case IPV6_RTHDRDSTOPTS:
1798 #endif
1799 printf(" Dst Options: ");
1800 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1801 break;
1802 case IPV6_RTHDR:
1803 printf(" Routing: ");
1804 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1805 break;
1806 }
1807 }
1808 }
1809
1810 #ifdef USE_RFC2292BIS
1811 void
pr_ip6opt(void * extbuf,size_t bufsize)1812 pr_ip6opt(void *extbuf, size_t bufsize)
1813 {
1814 struct ip6_hbh *ext;
1815 int currentlen;
1816 u_int8_t type;
1817 socklen_t extlen, len;
1818 void *databuf;
1819 size_t offset;
1820 u_int16_t value2;
1821 u_int32_t value4;
1822
1823 ext = (struct ip6_hbh *)extbuf;
1824 extlen = (ext->ip6h_len + 1) * 8;
1825 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1826 (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1827
1828 /*
1829 * Bounds checking on the ancillary data buffer:
1830 * subtract the size of a cmsg structure from the buffer size.
1831 */
1832 if (bufsize < (extlen + CMSG_SPACE(0))) {
1833 extlen = bufsize - CMSG_SPACE(0);
1834 warnx("options truncated, showing only %u (total=%u)",
1835 (unsigned int)(extlen / 8 - 1),
1836 (unsigned int)(ext->ip6h_len));
1837 }
1838
1839 currentlen = 0;
1840 while (1) {
1841 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1842 &type, &len, &databuf);
1843 if (currentlen == -1)
1844 break;
1845 switch (type) {
1846 /*
1847 * Note that inet6_opt_next automatically skips any padding
1848 * optins.
1849 */
1850 case IP6OPT_JUMBO:
1851 offset = 0;
1852 offset = inet6_opt_get_val(databuf, offset,
1853 &value4, sizeof(value4));
1854 printf(" Jumbo Payload Opt: Length %u\n",
1855 (u_int32_t)ntohl(value4));
1856 break;
1857 case IP6OPT_ROUTER_ALERT:
1858 offset = 0;
1859 offset = inet6_opt_get_val(databuf, offset,
1860 &value2, sizeof(value2));
1861 printf(" Router Alert Opt: Type %u\n",
1862 ntohs(value2));
1863 break;
1864 default:
1865 printf(" Received Opt %u len %lu\n",
1866 type, (unsigned long)len);
1867 break;
1868 }
1869 }
1870 return;
1871 }
1872 #else /* !USE_RFC2292BIS */
1873 /* ARGSUSED */
1874 void
pr_ip6opt(void * extbuf,size_t bufsize __unused)1875 pr_ip6opt(void *extbuf, size_t bufsize __unused)
1876 {
1877 putchar('\n');
1878 return;
1879 }
1880 #endif /* USE_RFC2292BIS */
1881
1882 #ifdef USE_RFC2292BIS
1883 void
pr_rthdr(void * extbuf,size_t bufsize)1884 pr_rthdr(void *extbuf, size_t bufsize)
1885 {
1886 struct in6_addr *in6;
1887 char ntopbuf[INET6_ADDRSTRLEN];
1888 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1889 int i, segments, origsegs, rthsize, size0, size1;
1890
1891 /* print fixed part of the header */
1892 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1893 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1894 if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1895 printf("%d segments, ", segments);
1896 printf("%d left\n", rh->ip6r_segleft);
1897 } else {
1898 printf("segments unknown, ");
1899 printf("%d left\n", rh->ip6r_segleft);
1900 return;
1901 }
1902
1903 /*
1904 * Bounds checking on the ancillary data buffer. When calculating
1905 * the number of items to show keep in mind:
1906 * - The size of the cmsg structure
1907 * - The size of one segment (the size of a Type 0 routing header)
1908 * - When dividing add a fudge factor of one in case the
1909 * dividend is not evenly divisible by the divisor
1910 */
1911 rthsize = (rh->ip6r_len + 1) * 8;
1912 if (bufsize < (rthsize + CMSG_SPACE(0))) {
1913 origsegs = segments;
1914 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1915 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1916 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1917 (size1 - size0) + 1;
1918 warnx("segments truncated, showing only %d (total=%d)",
1919 segments, origsegs);
1920 }
1921
1922 for (i = 0; i < segments; i++) {
1923 in6 = inet6_rth_getaddr(extbuf, i);
1924 if (in6 == NULL)
1925 printf(" [%d]<NULL>\n", i);
1926 else {
1927 if (!inet_ntop(AF_INET6, in6, ntopbuf,
1928 sizeof(ntopbuf)))
1929 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1930 printf(" [%d]%s\n", i, ntopbuf);
1931 }
1932 }
1933
1934 return;
1935
1936 }
1937
1938 #else /* !USE_RFC2292BIS */
1939 /* ARGSUSED */
1940 void
pr_rthdr(void * extbuf,size_t bufsize __unused)1941 pr_rthdr(void *extbuf, size_t bufsize __unused)
1942 {
1943 putchar('\n');
1944 return;
1945 }
1946 #endif /* USE_RFC2292BIS */
1947
1948 int
pr_bitrange(u_int32_t v,int soff,int ii)1949 pr_bitrange(u_int32_t v, int soff, int ii)
1950 {
1951 int off;
1952 int i;
1953
1954 off = 0;
1955 while (off < 32) {
1956 /* shift till we have 0x01 */
1957 if ((v & 0x01) == 0) {
1958 if (ii > 1)
1959 printf("-%u", soff + off - 1);
1960 ii = 0;
1961 switch (v & 0x0f) {
1962 case 0x00:
1963 v >>= 4;
1964 off += 4;
1965 continue;
1966 case 0x08:
1967 v >>= 3;
1968 off += 3;
1969 continue;
1970 case 0x04: case 0x0c:
1971 v >>= 2;
1972 off += 2;
1973 continue;
1974 default:
1975 v >>= 1;
1976 off += 1;
1977 continue;
1978 }
1979 }
1980
1981 /* we have 0x01 with us */
1982 for (i = 0; i < 32 - off; i++) {
1983 if ((v & (0x01 << i)) == 0)
1984 break;
1985 }
1986 if (!ii)
1987 printf(" %u", soff + off);
1988 ii += i;
1989 v >>= i; off += i;
1990 }
1991 return ii;
1992 }
1993
1994 void
pr_suptypes(struct icmp6_nodeinfo * ni,size_t nilen)1995 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
1996 /* ni->qtype must be SUPTYPES */
1997 {
1998 size_t clen;
1999 u_int32_t v;
2000 const u_char *cp, *end;
2001 u_int16_t cur;
2002 struct cbit {
2003 u_int16_t words; /*32bit count*/
2004 u_int16_t skip;
2005 } cbit;
2006 #define MAXQTYPES (1 << 16)
2007 size_t off;
2008 int b;
2009
2010 cp = (u_char *)(ni + 1);
2011 end = ((u_char *)ni) + nilen;
2012 cur = 0;
2013 b = 0;
2014
2015 printf("NodeInfo Supported Qtypes");
2016 if (options & F_VERBOSE) {
2017 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2018 printf(", compressed bitmap");
2019 else
2020 printf(", raw bitmap");
2021 }
2022
2023 while (cp < end) {
2024 clen = (size_t)(end - cp);
2025 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2026 if (clen == 0 || clen > MAXQTYPES / 8 ||
2027 clen % sizeof(v)) {
2028 printf("???");
2029 return;
2030 }
2031 } else {
2032 if (clen < sizeof(cbit) || clen % sizeof(v))
2033 return;
2034 memcpy(&cbit, cp, sizeof(cbit));
2035 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2036 clen)
2037 return;
2038 cp += sizeof(cbit);
2039 clen = ntohs(cbit.words) * sizeof(v);
2040 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2041 MAXQTYPES)
2042 return;
2043 }
2044
2045 for (off = 0; off < clen; off += sizeof(v)) {
2046 memcpy(&v, cp + off, sizeof(v));
2047 v = (u_int32_t)ntohl(v);
2048 b = pr_bitrange(v, (int)(cur + off * 8), b);
2049 }
2050 /* flush the remaining bits */
2051 b = pr_bitrange(0, (int)(cur + off * 8), b);
2052
2053 cp += clen;
2054 cur += clen * 8;
2055 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2056 cur += ntohs(cbit.skip) * 32;
2057 }
2058 }
2059
2060 void
pr_nodeaddr(struct icmp6_nodeinfo * ni,int nilen)2061 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2062 /* ni->qtype must be NODEADDR */
2063 {
2064 u_char *cp = (u_char *)(ni + 1);
2065 char ntop_buf[INET6_ADDRSTRLEN];
2066 int withttl = 0;
2067
2068 nilen -= sizeof(struct icmp6_nodeinfo);
2069
2070 if (options & F_VERBOSE) {
2071 switch (ni->ni_code) {
2072 case ICMP6_NI_REFUSED:
2073 (void)printf("refused");
2074 break;
2075 case ICMP6_NI_UNKNOWN:
2076 (void)printf("unknown qtype");
2077 break;
2078 }
2079 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2080 (void)printf(" truncated");
2081 }
2082 putchar('\n');
2083 if (nilen <= 0)
2084 printf(" no address\n");
2085
2086 /*
2087 * In icmp-name-lookups 05 and later, TTL of each returned address
2088 * is contained in the resposne. We try to detect the version
2089 * by the length of the data, but note that the detection algorithm
2090 * is incomplete. We assume the latest draft by default.
2091 */
2092 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2093 withttl = 1;
2094 while (nilen > 0) {
2095 u_int32_t ttl;
2096
2097 if (withttl) {
2098 /* XXX: alignment? */
2099 ttl = (u_int32_t)ntohl(*(u_int32_t *)cp);
2100 cp += sizeof(u_int32_t);
2101 nilen -= sizeof(u_int32_t);
2102 }
2103
2104 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2105 NULL)
2106 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2107 printf(" %s", ntop_buf);
2108 if (withttl) {
2109 if (ttl == 0xffffffff) {
2110 /*
2111 * XXX: can this convention be applied to all
2112 * type of TTL (i.e. non-ND TTL)?
2113 */
2114 printf("(TTL=infty)");
2115 }
2116 else
2117 printf("(TTL=%u)", ttl);
2118 }
2119 putchar('\n');
2120
2121 nilen -= sizeof(struct in6_addr);
2122 cp += sizeof(struct in6_addr);
2123 }
2124 }
2125
2126 int
get_hoplim(struct msghdr * mhdr)2127 get_hoplim(struct msghdr *mhdr)
2128 {
2129 struct cmsghdr *cm;
2130
2131 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2132 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2133 if (cm->cmsg_len == 0)
2134 return(-1);
2135
2136 if (cm->cmsg_level == IPPROTO_IPV6 &&
2137 cm->cmsg_type == IPV6_HOPLIMIT &&
2138 cm->cmsg_len == CMSG_LEN(sizeof(int)))
2139 return(*(int *)CMSG_DATA(cm));
2140 }
2141
2142 return(-1);
2143 }
2144
2145 struct in6_pktinfo *
get_rcvpktinfo(struct msghdr * mhdr)2146 get_rcvpktinfo(struct msghdr *mhdr)
2147 {
2148 struct cmsghdr *cm;
2149
2150 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2151 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2152 if (cm->cmsg_len == 0)
2153 return(NULL);
2154
2155 if (cm->cmsg_level == IPPROTO_IPV6 &&
2156 cm->cmsg_type == IPV6_PKTINFO &&
2157 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo)))
2158 return((struct in6_pktinfo *)CMSG_DATA(cm));
2159 }
2160
2161 return(NULL);
2162 }
2163
2164 int
get_pathmtu(struct msghdr * mhdr)2165 get_pathmtu(struct msghdr *mhdr)
2166 {
2167 #ifdef IPV6_RECVPATHMTU
2168 struct cmsghdr *cm;
2169 struct ip6_mtuinfo *mtuctl = NULL;
2170
2171 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2172 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2173 if (cm->cmsg_len == 0)
2174 return(0);
2175
2176 if (cm->cmsg_level == IPPROTO_IPV6 &&
2177 cm->cmsg_type == IPV6_PATHMTU &&
2178 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2179 mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm);
2180
2181 /*
2182 * If the notified destination is different from
2183 * the one we are pinging, just ignore the info.
2184 * We check the scope ID only when both notified value
2185 * and our own value have non-0 values, because we may
2186 * have used the default scope zone ID for sending,
2187 * in which case the scope ID value is 0.
2188 */
2189 if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr,
2190 &dst.sin6_addr) ||
2191 (mtuctl->ip6m_addr.sin6_scope_id &&
2192 dst.sin6_scope_id &&
2193 mtuctl->ip6m_addr.sin6_scope_id !=
2194 dst.sin6_scope_id)) {
2195 if ((options & F_VERBOSE) != 0) {
2196 printf("path MTU for %s is notified. "
2197 "(ignored)\n",
2198 pr_addr((struct sockaddr *)&mtuctl->ip6m_addr,
2199 sizeof(mtuctl->ip6m_addr)));
2200 }
2201 return(0);
2202 }
2203
2204 /*
2205 * Ignore an invalid MTU. XXX: can we just believe
2206 * the kernel check?
2207 */
2208 if (mtuctl->ip6m_mtu < IPV6_MMTU)
2209 return(0);
2210
2211 /* notification for our destination. return the MTU. */
2212 return((int)mtuctl->ip6m_mtu);
2213 }
2214 }
2215 #endif
2216 return(0);
2217 }
2218
2219 /*
2220 * tvsub --
2221 * Subtract 2 timeval structs: out = out - in. Out is assumed to
2222 * be >= in.
2223 */
2224 void
tvsub(struct timeval * out,struct timeval * in)2225 tvsub(struct timeval *out, struct timeval *in)
2226 {
2227 if ((out->tv_usec -= in->tv_usec) < 0) {
2228 --out->tv_sec;
2229 out->tv_usec += 1000000;
2230 }
2231 out->tv_sec -= in->tv_sec;
2232 }
2233
2234 /*
2235 * onint --
2236 * SIGINT handler.
2237 */
2238 /* ARGSUSED */
2239 void
onint(int notused __unused)2240 onint(int notused __unused)
2241 {
2242 summary();
2243
2244 if (res != NULL)
2245 freeaddrinfo(res);
2246
2247 if(packet != NULL)
2248 free(packet);
2249
2250 #ifndef HAVE_POLL_H
2251 if(fdmaskp != NULL)
2252 free(fdmaskp);
2253 #endif
2254
2255 (void)signal(SIGINT, SIG_DFL);
2256 (void)kill(getpid(), SIGINT);
2257
2258 /* NOTREACHED */
2259 exit(1);
2260 }
2261
2262 /*
2263 * summary --
2264 * Print out statistics.
2265 */
2266 void
summary(void)2267 summary(void)
2268 {
2269
2270 (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2271 (void)printf("%ld packets transmitted, ", ntransmitted);
2272 (void)printf("%ld packets received, ", nreceived);
2273 if (nrepeats)
2274 (void)printf("+%ld duplicates, ", nrepeats);
2275 if (ntransmitted) {
2276 if (nreceived > ntransmitted)
2277 (void)printf("-- somebody's duplicating packets!");
2278 else
2279 (void)printf("%.1f%% packet loss",
2280 ((((double)ntransmitted - nreceived) * 100.0) /
2281 ntransmitted));
2282 }
2283 (void)putchar('\n');
2284 if (nreceived && timing) {
2285 /* Only display average to microseconds */
2286 double num = nreceived + nrepeats;
2287 double avg = tsum / num;
2288 double dev = sqrt(tsumsq / num - avg * avg);
2289 (void)printf(
2290 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2291 tmin, avg, tmax, dev);
2292 (void)fflush(stdout);
2293 }
2294 (void)fflush(stdout);
2295 }
2296
2297 /*subject type*/
2298 static const char *niqcode[] = {
2299 "IPv6 address",
2300 "DNS label", /*or empty*/
2301 "IPv4 address",
2302 };
2303
2304 /*result code*/
2305 static const char *nircode[] = {
2306 "Success", "Refused", "Unknown",
2307 };
2308
2309
2310 /*
2311 * pr_icmph --
2312 * Print a descriptive string about an ICMP header.
2313 */
2314 void
pr_icmph(struct icmp6_hdr * icp,u_char * end)2315 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2316 {
2317 char ntop_buf[INET6_ADDRSTRLEN];
2318 struct nd_redirect *red;
2319 struct icmp6_nodeinfo *ni;
2320 char dnsname[MAXDNAME + 1];
2321 const u_char *cp;
2322 size_t l;
2323
2324 switch (icp->icmp6_type) {
2325 case ICMP6_DST_UNREACH:
2326 switch (icp->icmp6_code) {
2327 case ICMP6_DST_UNREACH_NOROUTE:
2328 (void)printf("No Route to Destination\n");
2329 break;
2330 case ICMP6_DST_UNREACH_ADMIN:
2331 (void)printf("Destination Administratively "
2332 "Unreachable\n");
2333 break;
2334 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2335 (void)printf("Destination Unreachable Beyond Scope\n");
2336 break;
2337 case ICMP6_DST_UNREACH_ADDR:
2338 (void)printf("Destination Host Unreachable\n");
2339 break;
2340 case ICMP6_DST_UNREACH_NOPORT:
2341 (void)printf("Destination Port Unreachable\n");
2342 break;
2343 default:
2344 (void)printf("Destination Unreachable, Bad Code: %d\n",
2345 icp->icmp6_code);
2346 break;
2347 }
2348 /* Print returned IP header information */
2349 pr_retip((struct ip6_hdr *)(icp + 1), end);
2350 break;
2351 case ICMP6_PACKET_TOO_BIG:
2352 (void)printf("Packet too big mtu = %d\n",
2353 (int)ntohl(icp->icmp6_mtu));
2354 pr_retip((struct ip6_hdr *)(icp + 1), end);
2355 break;
2356 case ICMP6_TIME_EXCEEDED:
2357 switch (icp->icmp6_code) {
2358 case ICMP6_TIME_EXCEED_TRANSIT:
2359 (void)printf("Time to live exceeded\n");
2360 break;
2361 case ICMP6_TIME_EXCEED_REASSEMBLY:
2362 (void)printf("Frag reassembly time exceeded\n");
2363 break;
2364 default:
2365 (void)printf("Time exceeded, Bad Code: %d\n",
2366 icp->icmp6_code);
2367 break;
2368 }
2369 pr_retip((struct ip6_hdr *)(icp + 1), end);
2370 break;
2371 case ICMP6_PARAM_PROB:
2372 (void)printf("Parameter problem: ");
2373 switch (icp->icmp6_code) {
2374 case ICMP6_PARAMPROB_HEADER:
2375 (void)printf("Erroneous Header ");
2376 break;
2377 case ICMP6_PARAMPROB_NEXTHEADER:
2378 (void)printf("Unknown Nextheader ");
2379 break;
2380 case ICMP6_PARAMPROB_OPTION:
2381 (void)printf("Unrecognized Option ");
2382 break;
2383 default:
2384 (void)printf("Bad code(%d) ", icp->icmp6_code);
2385 break;
2386 }
2387 (void)printf("pointer = 0x%02x\n",
2388 (u_int32_t)ntohl(icp->icmp6_pptr));
2389 pr_retip((struct ip6_hdr *)(icp + 1), end);
2390 break;
2391 case ICMP6_ECHO_REQUEST:
2392 (void)printf("Echo Request");
2393 /* XXX ID + Seq + Data */
2394 break;
2395 case ICMP6_ECHO_REPLY:
2396 (void)printf("Echo Reply");
2397 /* XXX ID + Seq + Data */
2398 break;
2399 case ICMP6_MEMBERSHIP_QUERY:
2400 (void)printf("Listener Query");
2401 break;
2402 case ICMP6_MEMBERSHIP_REPORT:
2403 (void)printf("Listener Report");
2404 break;
2405 case ICMP6_MEMBERSHIP_REDUCTION:
2406 (void)printf("Listener Done");
2407 break;
2408 case ND_ROUTER_SOLICIT:
2409 (void)printf("Router Solicitation");
2410 break;
2411 case ND_ROUTER_ADVERT:
2412 (void)printf("Router Advertisement");
2413 break;
2414 case ND_NEIGHBOR_SOLICIT:
2415 (void)printf("Neighbor Solicitation");
2416 break;
2417 case ND_NEIGHBOR_ADVERT:
2418 (void)printf("Neighbor Advertisement");
2419 break;
2420 case ND_REDIRECT:
2421 red = (struct nd_redirect *)icp;
2422 (void)printf("Redirect\n");
2423 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2424 sizeof(ntop_buf)))
2425 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2426 (void)printf("Destination: %s", ntop_buf);
2427 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2428 sizeof(ntop_buf)))
2429 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2430 (void)printf(" New Target: %s", ntop_buf);
2431 break;
2432 case ICMP6_NI_QUERY:
2433 (void)printf("Node Information Query");
2434 /* XXX ID + Seq + Data */
2435 ni = (struct icmp6_nodeinfo *)icp;
2436 l = end - (u_char *)(ni + 1);
2437 printf(", ");
2438 switch (ntohs(ni->ni_qtype)) {
2439 case NI_QTYPE_NOOP:
2440 (void)printf("NOOP");
2441 break;
2442 case NI_QTYPE_SUPTYPES:
2443 (void)printf("Supported qtypes");
2444 break;
2445 case NI_QTYPE_FQDN:
2446 (void)printf("DNS name");
2447 break;
2448 case NI_QTYPE_NODEADDR:
2449 (void)printf("nodeaddr");
2450 break;
2451 case NI_QTYPE_IPV4ADDR:
2452 (void)printf("IPv4 nodeaddr");
2453 break;
2454 default:
2455 (void)printf("unknown qtype");
2456 break;
2457 }
2458 if (options & F_VERBOSE) {
2459 switch (ni->ni_code) {
2460 case ICMP6_NI_SUBJ_IPV6:
2461 if (l == sizeof(struct in6_addr) &&
2462 inet_ntop(AF_INET6, ni + 1, ntop_buf,
2463 sizeof(ntop_buf)) != NULL) {
2464 (void)printf(", subject=%s(%s)",
2465 niqcode[ni->ni_code], ntop_buf);
2466 } else {
2467 #if 1
2468 /* backward compat to -W */
2469 (void)printf(", oldfqdn");
2470 #else
2471 (void)printf(", invalid");
2472 #endif
2473 }
2474 break;
2475 case ICMP6_NI_SUBJ_FQDN:
2476 if (end == (u_char *)(ni + 1)) {
2477 (void)printf(", no subject");
2478 break;
2479 }
2480 printf(", subject=%s", niqcode[ni->ni_code]);
2481 cp = (const u_char *)(ni + 1);
2482 if (dnsdecode(&cp, end, NULL, dnsname,
2483 sizeof(dnsname)) != NULL)
2484 printf("(%s)", dnsname);
2485 else
2486 printf("(invalid)");
2487 break;
2488 case ICMP6_NI_SUBJ_IPV4:
2489 if (l == sizeof(struct in_addr) &&
2490 inet_ntop(AF_INET, ni + 1, ntop_buf,
2491 sizeof(ntop_buf)) != NULL) {
2492 (void)printf(", subject=%s(%s)",
2493 niqcode[ni->ni_code], ntop_buf);
2494 } else
2495 (void)printf(", invalid");
2496 break;
2497 default:
2498 (void)printf(", invalid");
2499 break;
2500 }
2501 }
2502 break;
2503 case ICMP6_NI_REPLY:
2504 (void)printf("Node Information Reply");
2505 /* XXX ID + Seq + Data */
2506 ni = (struct icmp6_nodeinfo *)icp;
2507 printf(", ");
2508 switch (ntohs(ni->ni_qtype)) {
2509 case NI_QTYPE_NOOP:
2510 (void)printf("NOOP");
2511 break;
2512 case NI_QTYPE_SUPTYPES:
2513 (void)printf("Supported qtypes");
2514 break;
2515 case NI_QTYPE_FQDN:
2516 (void)printf("DNS name");
2517 break;
2518 case NI_QTYPE_NODEADDR:
2519 (void)printf("nodeaddr");
2520 break;
2521 case NI_QTYPE_IPV4ADDR:
2522 (void)printf("IPv4 nodeaddr");
2523 break;
2524 default:
2525 (void)printf("unknown qtype");
2526 break;
2527 }
2528 if (options & F_VERBOSE) {
2529 if (ni->ni_code > sizeof(nircode) / sizeof(nircode[0]))
2530 printf(", invalid");
2531 else
2532 printf(", %s", nircode[ni->ni_code]);
2533 }
2534 break;
2535 default:
2536 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2537 }
2538 }
2539
2540 /*
2541 * pr_iph --
2542 * Print an IP6 header.
2543 */
2544 void
pr_iph(struct ip6_hdr * ip6)2545 pr_iph(struct ip6_hdr *ip6)
2546 {
2547 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2548 u_int8_t tc;
2549 char ntop_buf[INET6_ADDRSTRLEN];
2550
2551 tc = *(&ip6->ip6_vfc + 1); /* XXX */
2552 tc = (tc >> 4) & 0x0f;
2553 tc |= (ip6->ip6_vfc << 4);
2554
2555 printf("Vr TC Flow Plen Nxt Hlim\n");
2556 printf(" %1x %02x %05x %04x %02x %02x\n",
2557 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2558 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2559 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2560 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2561 printf("%s->", ntop_buf);
2562 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2563 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2564 printf("%s\n", ntop_buf);
2565 }
2566
2567 /*
2568 * pr_addr --
2569 * Return an ascii host address as a dotted quad and optionally with
2570 * a hostname.
2571 */
2572 const char *
pr_addr(struct sockaddr * addr,int addrlen)2573 pr_addr(struct sockaddr *addr, int addrlen)
2574 {
2575 static char buf[NI_MAXHOST];
2576 int flag = 0;
2577
2578 if ((options & F_HOSTNAME) == 0)
2579 flag |= NI_NUMERICHOST;
2580
2581 if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0)
2582 return (buf);
2583 else
2584 return "?";
2585 }
2586
2587 /*
2588 * pr_retip --
2589 * Dump some info on a returned (via ICMPv6) IPv6 packet.
2590 */
2591 void
pr_retip(struct ip6_hdr * ip6,u_char * end)2592 pr_retip(struct ip6_hdr *ip6, u_char *end)
2593 {
2594 u_char *cp = (u_char *)ip6, nh;
2595 int hlen;
2596
2597 if (end - (u_char *)ip6 < sizeof(*ip6)) {
2598 printf("IP6");
2599 goto trunc;
2600 }
2601 pr_iph(ip6);
2602 hlen = sizeof(*ip6);
2603
2604 nh = ip6->ip6_nxt;
2605 cp += hlen;
2606 while (end - cp >= 8) {
2607 switch (nh) {
2608 case IPPROTO_HOPOPTS:
2609 printf("HBH ");
2610 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2611 nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2612 break;
2613 case IPPROTO_DSTOPTS:
2614 printf("DSTOPT ");
2615 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2616 nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2617 break;
2618 case IPPROTO_FRAGMENT:
2619 printf("FRAG ");
2620 hlen = sizeof(struct ip6_frag);
2621 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2622 break;
2623 case IPPROTO_ROUTING:
2624 printf("RTHDR ");
2625 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2626 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2627 break;
2628 #ifdef IPSEC
2629 case IPPROTO_AH:
2630 printf("AH ");
2631 hlen = (((struct ah *)cp)->ah_len+2) << 2;
2632 nh = ((struct ah *)cp)->ah_nxt;
2633 break;
2634 #endif
2635 case IPPROTO_ICMPV6:
2636 printf("ICMP6: type = %d, code = %d\n",
2637 *cp, *(cp + 1));
2638 return;
2639 case IPPROTO_ESP:
2640 printf("ESP\n");
2641 return;
2642 case IPPROTO_TCP:
2643 printf("TCP: from port %u, to port %u (decimal)\n",
2644 (*cp * 256 + *(cp + 1)),
2645 (*(cp + 2) * 256 + *(cp + 3)));
2646 return;
2647 case IPPROTO_UDP:
2648 printf("UDP: from port %u, to port %u (decimal)\n",
2649 (*cp * 256 + *(cp + 1)),
2650 (*(cp + 2) * 256 + *(cp + 3)));
2651 return;
2652 default:
2653 printf("Unknown Header(%d)\n", nh);
2654 return;
2655 }
2656
2657 if ((cp += hlen) >= end)
2658 goto trunc;
2659 }
2660 if (end - cp < 8)
2661 goto trunc;
2662
2663 putchar('\n');
2664 return;
2665
2666 trunc:
2667 printf("...\n");
2668 return;
2669 }
2670
2671 void
fill(char * bp,char * patp)2672 fill(char *bp, char *patp)
2673 {
2674 int ii, jj, kk;
2675 int pat[16];
2676 char *cp;
2677
2678 for (cp = patp; *cp; cp++)
2679 if (!isxdigit(*cp))
2680 errx(1, "patterns must be specified as hex digits");
2681 ii = sscanf(patp,
2682 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2683 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2684 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2685 &pat[13], &pat[14], &pat[15]);
2686
2687 /* xxx */
2688 if (ii > 0)
2689 for (kk = 0;
2690 kk <= MAXDATALEN - (8 + sizeof(struct tv32) + ii);
2691 kk += ii)
2692 for (jj = 0; jj < ii; ++jj)
2693 bp[jj + kk] = pat[jj];
2694 if (!(options & F_QUIET)) {
2695 (void)printf("PATTERN: 0x");
2696 for (jj = 0; jj < ii; ++jj)
2697 (void)printf("%02x", bp[jj] & 0xFF);
2698 (void)printf("\n");
2699 }
2700 }
2701
2702 #ifdef IPSEC
2703 #ifdef IPSEC_POLICY_IPSEC
2704 int
setpolicy(int so __unused,char * policy)2705 setpolicy(int so __unused, char *policy)
2706 {
2707 char *buf;
2708
2709 if (policy == NULL)
2710 return 0; /* ignore */
2711
2712 buf = ipsec_set_policy(policy, strlen(policy));
2713 if (buf == NULL)
2714 errx(1, "%s", ipsec_strerror());
2715 if (setsockopt(s, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2716 ipsec_get_policylen(buf)) < 0)
2717 warnx("Unable to set IPsec policy");
2718 free(buf);
2719
2720 return 0;
2721 }
2722 #endif
2723 #endif
2724
2725 char *
nigroup(char * name,int nig_oldmcprefix)2726 nigroup(char *name, int nig_oldmcprefix)
2727 {
2728 char *p;
2729 char *q;
2730 MD5_CTX ctxt;
2731 u_int8_t digest[16];
2732 u_int8_t c;
2733 size_t l;
2734 char hbuf[NI_MAXHOST];
2735 struct in6_addr in6;
2736 int valid;
2737
2738 p = strchr(name, '.');
2739 if (!p)
2740 p = name + strlen(name);
2741 l = p - name;
2742 if (l > 63 || l > sizeof(hbuf) - 1)
2743 return NULL; /*label too long*/
2744 strncpy(hbuf, name, l);
2745 hbuf[(int)l] = '\0';
2746
2747 for (q = name; *q; q++) {
2748 if (isupper(*(unsigned char *)q))
2749 *q = tolower(*(unsigned char *)q);
2750 }
2751
2752 /* generate 16 bytes of pseudo-random value. */
2753 memset(&ctxt, 0, sizeof(ctxt));
2754 MD5Init(&ctxt);
2755 c = l & 0xff;
2756 MD5Update(&ctxt, &c, sizeof(c));
2757 MD5Update(&ctxt, (unsigned char *)name, l);
2758 MD5Final(digest, &ctxt);
2759
2760 if (nig_oldmcprefix) {
2761 /* draft-ietf-ipngwg-icmp-name-lookup */
2762 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2763 } else {
2764 /* RFC 4620 */
2765 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2766 }
2767 if (valid != 1)
2768 return NULL; /*XXX*/
2769
2770 if (nig_oldmcprefix) {
2771 /* draft-ietf-ipngwg-icmp-name-lookup */
2772 bcopy(digest, &in6.s6_addr[12], 4);
2773 } else {
2774 /* RFC 4620 */
2775 bcopy(digest, &in6.s6_addr[13], 3);
2776 }
2777
2778 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2779 return NULL;
2780
2781 return strdup(hbuf);
2782 }
2783
2784 void
usage(void)2785 usage(void)
2786 {
2787 (void)fprintf(stderr,
2788 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2789 "A"
2790 #endif
2791 "usage: ping6 [-"
2792 "Dd"
2793 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2794 "E"
2795 #endif
2796 "fH"
2797 #ifdef IPV6_USE_MIN_MTU
2798 "m"
2799 #endif
2800 "nNoqrRtvwW] "
2801 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2802 " [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2803 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2804 " [-P policy]"
2805 #endif
2806 "\n"
2807 " [-p pattern] [-S sourceaddr] [-s packetsize] "
2808 "[hops ...] host\n");
2809 exit(1);
2810 }
2811