1 /* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the project nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */
35
36 /*
37 * Copyright (c) 1989, 1993
38 * The Regents of the University of California. All rights reserved.
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Mike Muuss.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 */
67
68 #if 0
69 #ifndef lint
70 static const char copyright[] =
71 "@(#) Copyright (c) 1989, 1993\n\
72 The Regents of the University of California. All rights reserved.\n";
73 #endif /* not lint */
74
75 #ifndef lint
76 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
77 #endif /* not lint */
78 #endif
79
80 #include <sys/cdefs.h>
81 __FBSDID("$FreeBSD$");
82
83 /*
84 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
85 * measure round-trip-delays and packet loss across network paths.
86 *
87 * Author -
88 * Mike Muuss
89 * U. S. Army Ballistic Research Laboratory
90 * December, 1983
91 *
92 * Status -
93 * Public Domain. Distribution Unlimited.
94 * Bugs -
95 * More statistics could always be gathered.
96 * This program has to run SUID to ROOT to access the ICMP socket.
97 */
98 /*
99 * NOTE:
100 * USE_SIN6_SCOPE_ID assumes that sin6_scope_id has the same semantics
101 * as IPV6_PKTINFO. Some people object it (sin6_scope_id specifies *link*
102 * while IPV6_PKTINFO specifies *interface*. Link is defined as collection of
103 * network attached to 1 or more interfaces)
104 */
105
106 #include <sys/param.h>
107 #include <sys/capsicum.h>
108 #include <sys/uio.h>
109 #include <sys/socket.h>
110
111 #include <net/if.h>
112 #include <net/route.h>
113
114 #include <netinet/in.h>
115 #include <netinet/ip6.h>
116 #include <netinet/icmp6.h>
117 #include <arpa/inet.h>
118 #include <arpa/nameser.h>
119 #include <netdb.h>
120
121 #include <capsicum_helpers.h>
122 #include <casper/cap_dns.h>
123 #include <libcasper.h>
124
125 #include <ctype.h>
126 #include <err.h>
127 #include <errno.h>
128 #include <fcntl.h>
129 #include <math.h>
130 #include <signal.h>
131 #include <stdio.h>
132 #include <stdlib.h>
133 #include <string.h>
134 #include <sysexits.h>
135 #include <time.h>
136 #include <unistd.h>
137
138 #ifdef IPSEC
139 #include <netipsec/ah.h>
140 #include <netipsec/ipsec.h>
141 #endif
142
143 #include <md5.h>
144
145 struct tv32 {
146 u_int32_t tv32_sec;
147 u_int32_t tv32_nsec;
148 };
149
150 #define MAXPACKETLEN 131072
151 #define IP6LEN 40
152 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */
153 #define ICMP6ECHOTMLEN sizeof(struct tv32)
154 #define ICMP6_NIQLEN (ICMP6ECHOLEN + 8)
155 # define CONTROLLEN 10240 /* ancillary data buffer size RFC3542 20.1 */
156 /* FQDN case, 64 bits of nonce + 32 bits ttl */
157 #define ICMP6_NIRLEN (ICMP6ECHOLEN + 12)
158 #define EXTRA 256 /* for AH and various other headers. weird. */
159 #define DEFDATALEN ICMP6ECHOTMLEN
160 #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN
161 #define NROUTES 9 /* number of record route slots */
162 #define MAXWAIT 10000 /* max ms to wait for response */
163 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */
164
165 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
166 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
167 #define SET(bit) (A(bit) |= B(bit))
168 #define CLR(bit) (A(bit) &= (~B(bit)))
169 #define TST(bit) (A(bit) & B(bit))
170
171 #define F_FLOOD 0x0001
172 #define F_INTERVAL 0x0002
173 #define F_PINGFILLED 0x0008
174 #define F_QUIET 0x0010
175 #define F_RROUTE 0x0020
176 #define F_SO_DEBUG 0x0040
177 #define F_VERBOSE 0x0100
178 #ifdef IPSEC
179 #ifdef IPSEC_POLICY_IPSEC
180 #define F_POLICY 0x0400
181 #else
182 #define F_AUTHHDR 0x0200
183 #define F_ENCRYPT 0x0400
184 #endif /*IPSEC_POLICY_IPSEC*/
185 #endif /*IPSEC*/
186 #define F_NODEADDR 0x0800
187 #define F_FQDN 0x1000
188 #define F_INTERFACE 0x2000
189 #define F_SRCADDR 0x4000
190 #define F_HOSTNAME 0x10000
191 #define F_FQDNOLD 0x20000
192 #define F_NIGROUP 0x40000
193 #define F_SUPTYPES 0x80000
194 #define F_NOMINMTU 0x100000
195 #define F_ONCE 0x200000
196 #define F_AUDIBLE 0x400000
197 #define F_MISSED 0x800000
198 #define F_DONTFRAG 0x1000000
199 #define F_NOUSERDATA (F_NODEADDR | F_FQDN | F_FQDNOLD | F_SUPTYPES)
200 #define F_WAITTIME 0x2000000
201 static u_int options;
202
203 #define IN6LEN sizeof(struct in6_addr)
204 #define SA6LEN sizeof(struct sockaddr_in6)
205 #define DUMMY_PORT 10101
206
207 #define SIN6(s) ((struct sockaddr_in6 *)(s))
208
209 /*
210 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
211 * number of received sequence numbers we can keep track of. Change 128
212 * to 8192 for complete accuracy...
213 */
214 #define MAX_DUP_CHK (8 * 8192)
215 static int mx_dup_ck = MAX_DUP_CHK;
216 static char rcvd_tbl[MAX_DUP_CHK / 8];
217
218 static struct sockaddr_in6 dst; /* who to ping6 */
219 static struct sockaddr_in6 src; /* src addr of this packet */
220 static socklen_t srclen;
221 static size_t datalen = DEFDATALEN;
222 static int ssend; /* send socket file descriptor */
223 static int srecv; /* receive socket file descriptor */
224 static u_char outpack[MAXPACKETLEN];
225 static char BSPACE = '\b'; /* characters written for flood */
226 static char BBELL = '\a'; /* characters written for AUDIBLE */
227 static char DOT = '.';
228 static char *hostname;
229 static int ident; /* process id to identify our packets */
230 static u_int8_t nonce[8]; /* nonce field for node information */
231 static int hoplimit = -1; /* hoplimit */
232 static u_char *packet = NULL;
233 static cap_channel_t *capdns;
234
235 /* counters */
236 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
237 static long npackets; /* max packets to transmit */
238 static long nreceived; /* # of packets we got back */
239 static long nrepeats; /* number of duplicates */
240 static long ntransmitted; /* sequence # for outbound packets = #sent */
241 static int interval = 1000; /* interval between packets in ms */
242 static int waittime = MAXWAIT; /* timeout for each packet */
243 static long nrcvtimeout = 0; /* # of packets we got back after waittime */
244
245 /* timing */
246 static int timing; /* flag to do timing */
247 static double tmin = 999999999.0; /* minimum round trip time */
248 static double tmax = 0.0; /* maximum round trip time */
249 static double tsum = 0.0; /* sum of all times, for doing average */
250 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
251
252 /* for node addresses */
253 static u_short naflags;
254
255 /* for ancillary data(advanced API) */
256 static struct msghdr smsghdr;
257 static struct iovec smsgiov;
258 static char *scmsg = 0;
259
260 static volatile sig_atomic_t seenint;
261 #ifdef SIGINFO
262 static volatile sig_atomic_t seeninfo;
263 #endif
264
265 int main(int, char *[]);
266 static cap_channel_t *capdns_setup(void);
267 static void fill(char *, char *);
268 static int get_hoplim(struct msghdr *);
269 static int get_pathmtu(struct msghdr *);
270 static struct in6_pktinfo *get_rcvpktinfo(struct msghdr *);
271 static void onsignal(int);
272 static void onint(int);
273 static size_t pingerlen(void);
274 static int pinger(void);
275 static const char *pr_addr(struct sockaddr *, int);
276 static void pr_icmph(struct icmp6_hdr *, u_char *);
277 static void pr_iph(struct ip6_hdr *);
278 static void pr_suptypes(struct icmp6_nodeinfo *, size_t);
279 static void pr_nodeaddr(struct icmp6_nodeinfo *, int);
280 static int myechoreply(const struct icmp6_hdr *);
281 static int mynireply(const struct icmp6_nodeinfo *);
282 static const char *dnsdecode(const u_char *, const u_char *, const u_char *,
283 char *, size_t);
284 static void pr_pack(u_char *, int, struct msghdr *);
285 static void pr_exthdrs(struct msghdr *);
286 static void pr_ip6opt(void *, size_t);
287 static void pr_rthdr(void *, size_t);
288 static int pr_bitrange(u_int32_t, int, int);
289 static void pr_retip(struct ip6_hdr *, u_char *);
290 static void summary(void);
291 static int setpolicy(int, char *);
292 static char *nigroup(char *, int);
293 static void usage(void);
294
295 int
main(int argc,char * argv[])296 main(int argc, char *argv[])
297 {
298 struct timespec last, intvl;
299 struct sockaddr_in6 from, *sin6;
300 struct addrinfo hints, *res;
301 struct sigaction si_sa;
302 int cc, i;
303 int almost_done, ch, hold, packlen, preload, optval, error;
304 int nig_oldmcprefix = -1;
305 u_char *datap;
306 char *e, *target, *ifname = NULL, *gateway = NULL;
307 int ip6optlen = 0;
308 struct cmsghdr *scmsgp = NULL;
309 /* For control (ancillary) data received from recvmsg() */
310 u_char cm[CONTROLLEN];
311 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
312 u_long lsockbufsize;
313 int sockbufsize = 0;
314 #endif
315 int usepktinfo = 0;
316 struct in6_pktinfo pktinfo;
317 char *cmsg_pktinfo = NULL;
318 struct ip6_rthdr *rthdr = NULL;
319 #ifdef IPSEC_POLICY_IPSEC
320 char *policy_in = NULL;
321 char *policy_out = NULL;
322 #endif
323 double t;
324 u_long alarmtimeout;
325 size_t rthlen;
326 #ifdef IPV6_USE_MIN_MTU
327 int mflag = 0;
328 #endif
329 cap_rights_t rights_srecv;
330 cap_rights_t rights_ssend;
331 cap_rights_t rights_stdin;
332
333 /* just to be sure */
334 memset(&smsghdr, 0, sizeof(smsghdr));
335 memset(&smsgiov, 0, sizeof(smsgiov));
336 memset(&pktinfo, 0, sizeof(pktinfo));
337
338 intvl.tv_sec = interval / 1000;
339 intvl.tv_nsec = interval % 1000 * 1000000;
340
341 alarmtimeout = preload = 0;
342 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
343 capdns = capdns_setup();
344 #ifndef IPSEC
345 #define ADDOPTS
346 #else
347 #ifdef IPSEC_POLICY_IPSEC
348 #define ADDOPTS "P:"
349 #else
350 #define ADDOPTS "AE"
351 #endif /*IPSEC_POLICY_IPSEC*/
352 #endif
353 while ((ch = getopt(argc, argv,
354 "a:b:c:DdfHg:h:I:i:l:mnNop:qrRS:s:tvwWx:X:" ADDOPTS)) != -1) {
355 #undef ADDOPTS
356 switch (ch) {
357 case 'a':
358 {
359 char *cp;
360
361 options &= ~F_NOUSERDATA;
362 options |= F_NODEADDR;
363 for (cp = optarg; *cp != '\0'; cp++) {
364 switch (*cp) {
365 case 'a':
366 naflags |= NI_NODEADDR_FLAG_ALL;
367 break;
368 case 'c':
369 case 'C':
370 naflags |= NI_NODEADDR_FLAG_COMPAT;
371 break;
372 case 'l':
373 case 'L':
374 naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
375 break;
376 case 's':
377 case 'S':
378 naflags |= NI_NODEADDR_FLAG_SITELOCAL;
379 break;
380 case 'g':
381 case 'G':
382 naflags |= NI_NODEADDR_FLAG_GLOBAL;
383 break;
384 case 'A': /* experimental. not in the spec */
385 #ifdef NI_NODEADDR_FLAG_ANYCAST
386 naflags |= NI_NODEADDR_FLAG_ANYCAST;
387 break;
388 #else
389 errx(1,
390 "-a A is not supported on the platform");
391 /*NOTREACHED*/
392 #endif
393 default:
394 usage();
395 /*NOTREACHED*/
396 }
397 }
398 break;
399 }
400 case 'b':
401 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
402 errno = 0;
403 e = NULL;
404 lsockbufsize = strtoul(optarg, &e, 10);
405 sockbufsize = (int)lsockbufsize;
406 if (errno || !*optarg || *e ||
407 lsockbufsize > INT_MAX)
408 errx(1, "invalid socket buffer size");
409 #else
410 errx(1,
411 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
412 #endif
413 break;
414 case 'c':
415 npackets = strtol(optarg, &e, 10);
416 if (npackets <= 0 || *optarg == '\0' || *e != '\0')
417 errx(1,
418 "illegal number of packets -- %s", optarg);
419 break;
420 case 'D':
421 options |= F_DONTFRAG;
422 break;
423 case 'd':
424 options |= F_SO_DEBUG;
425 break;
426 case 'f':
427 if (getuid()) {
428 errno = EPERM;
429 errx(1, "Must be superuser to flood ping");
430 }
431 options |= F_FLOOD;
432 setbuf(stdout, (char *)NULL);
433 break;
434 case 'g':
435 gateway = optarg;
436 break;
437 case 'H':
438 options |= F_HOSTNAME;
439 break;
440 case 'h': /* hoplimit */
441 hoplimit = strtol(optarg, &e, 10);
442 if (*optarg == '\0' || *e != '\0')
443 errx(1, "illegal hoplimit %s", optarg);
444 if (255 < hoplimit || hoplimit < -1)
445 errx(1,
446 "illegal hoplimit -- %s", optarg);
447 break;
448 case 'I':
449 ifname = optarg;
450 options |= F_INTERFACE;
451 #ifndef USE_SIN6_SCOPE_ID
452 usepktinfo++;
453 #endif
454 break;
455 case 'i': /* wait between sending packets */
456 t = strtod(optarg, &e);
457 if (*optarg == '\0' || *e != '\0')
458 errx(1, "illegal timing interval %s", optarg);
459 if (t < 1 && getuid()) {
460 errx(1, "%s: only root may use interval < 1s",
461 strerror(EPERM));
462 }
463 intvl.tv_sec = (time_t)t;
464 intvl.tv_nsec =
465 (long)((t - intvl.tv_sec) * 1000000000);
466 if (intvl.tv_sec < 0)
467 errx(1, "illegal timing interval %s", optarg);
468 /* less than 1/hz does not make sense */
469 if (intvl.tv_sec == 0 && intvl.tv_nsec < 1000) {
470 warnx("too small interval, raised to .000001");
471 intvl.tv_nsec = 1000;
472 }
473 options |= F_INTERVAL;
474 break;
475 case 'l':
476 if (getuid()) {
477 errno = EPERM;
478 errx(1, "Must be superuser to preload");
479 }
480 preload = strtol(optarg, &e, 10);
481 if (preload < 0 || *optarg == '\0' || *e != '\0')
482 errx(1, "illegal preload value -- %s", optarg);
483 break;
484 case 'm':
485 #ifdef IPV6_USE_MIN_MTU
486 mflag++;
487 break;
488 #else
489 errx(1, "-%c is not supported on this platform", ch);
490 /*NOTREACHED*/
491 #endif
492 case 'n':
493 options &= ~F_HOSTNAME;
494 break;
495 case 'N':
496 options |= F_NIGROUP;
497 nig_oldmcprefix++;
498 break;
499 case 'o':
500 options |= F_ONCE;
501 break;
502 case 'p': /* fill buffer with user pattern */
503 options |= F_PINGFILLED;
504 fill((char *)datap, optarg);
505 break;
506 case 'q':
507 options |= F_QUIET;
508 break;
509 case 'r':
510 options |= F_AUDIBLE;
511 break;
512 case 'R':
513 options |= F_MISSED;
514 break;
515 case 'S':
516 memset(&hints, 0, sizeof(struct addrinfo));
517 hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */
518 hints.ai_family = AF_INET6;
519 hints.ai_socktype = SOCK_RAW;
520 hints.ai_protocol = IPPROTO_ICMPV6;
521
522 error = cap_getaddrinfo(capdns, optarg, NULL, &hints, &res);
523 if (error) {
524 errx(1, "invalid source address: %s",
525 gai_strerror(error));
526 }
527 /*
528 * res->ai_family must be AF_INET6 and res->ai_addrlen
529 * must be sizeof(src).
530 */
531 memcpy(&src, res->ai_addr, res->ai_addrlen);
532 srclen = res->ai_addrlen;
533 freeaddrinfo(res);
534 options |= F_SRCADDR;
535 break;
536 case 's': /* size of packet to send */
537 datalen = strtol(optarg, &e, 10);
538 if (datalen <= 0 || *optarg == '\0' || *e != '\0')
539 errx(1, "illegal datalen value -- %s", optarg);
540 if (datalen > MAXDATALEN) {
541 errx(1,
542 "datalen value too large, maximum is %d",
543 MAXDATALEN);
544 }
545 break;
546 case 't':
547 options &= ~F_NOUSERDATA;
548 options |= F_SUPTYPES;
549 break;
550 case 'v':
551 options |= F_VERBOSE;
552 break;
553 case 'w':
554 options &= ~F_NOUSERDATA;
555 options |= F_FQDN;
556 break;
557 case 'W':
558 options &= ~F_NOUSERDATA;
559 options |= F_FQDNOLD;
560 break;
561 case 'x':
562 t = strtod(optarg, &e);
563 if (*e || e == optarg || t > (double)INT_MAX)
564 err(EX_USAGE, "invalid timing interval: `%s'",
565 optarg);
566 options |= F_WAITTIME;
567 waittime = (int)t;
568 break;
569 case 'X':
570 alarmtimeout = strtoul(optarg, &e, 0);
571 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
572 errx(EX_USAGE, "invalid timeout: `%s'",
573 optarg);
574 if (alarmtimeout > MAXALARM)
575 errx(EX_USAGE, "invalid timeout: `%s' > %d",
576 optarg, MAXALARM);
577 alarm((int)alarmtimeout);
578 break;
579 #ifdef IPSEC
580 #ifdef IPSEC_POLICY_IPSEC
581 case 'P':
582 options |= F_POLICY;
583 if (!strncmp("in", optarg, 2)) {
584 if ((policy_in = strdup(optarg)) == NULL)
585 errx(1, "strdup");
586 } else if (!strncmp("out", optarg, 3)) {
587 if ((policy_out = strdup(optarg)) == NULL)
588 errx(1, "strdup");
589 } else
590 errx(1, "invalid security policy");
591 break;
592 #else
593 case 'A':
594 options |= F_AUTHHDR;
595 break;
596 case 'E':
597 options |= F_ENCRYPT;
598 break;
599 #endif /*IPSEC_POLICY_IPSEC*/
600 #endif /*IPSEC*/
601 default:
602 usage();
603 /*NOTREACHED*/
604 }
605 }
606
607 argc -= optind;
608 argv += optind;
609
610 if (argc < 1) {
611 usage();
612 /*NOTREACHED*/
613 }
614
615 if (argc > 1) {
616 #ifdef IPV6_RECVRTHDR /* 2292bis */
617 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
618 argc - 1));
619 #else /* RFC2292 */
620 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
621 #endif
622 if (rthlen == 0) {
623 errx(1, "too many intermediate hops");
624 /*NOTREACHED*/
625 }
626 ip6optlen += rthlen;
627 }
628
629 if (options & F_NIGROUP) {
630 target = nigroup(argv[argc - 1], nig_oldmcprefix);
631 if (target == NULL) {
632 usage();
633 /*NOTREACHED*/
634 }
635 } else
636 target = argv[argc - 1];
637
638 /* cap_getaddrinfo */
639 memset(&hints, 0, sizeof(struct addrinfo));
640 hints.ai_flags = AI_CANONNAME;
641 hints.ai_family = AF_INET6;
642 hints.ai_socktype = SOCK_RAW;
643 hints.ai_protocol = IPPROTO_ICMPV6;
644
645 error = cap_getaddrinfo(capdns, target, NULL, &hints, &res);
646 if (error)
647 errx(1, "%s", gai_strerror(error));
648 if (res->ai_canonname)
649 hostname = strdup(res->ai_canonname);
650 else
651 hostname = target;
652
653 if (!res->ai_addr)
654 errx(1, "cap_getaddrinfo failed");
655
656 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
657
658 if ((ssend = socket(res->ai_family, res->ai_socktype,
659 res->ai_protocol)) < 0)
660 err(1, "socket ssend");
661 if ((srecv = socket(res->ai_family, res->ai_socktype,
662 res->ai_protocol)) < 0)
663 err(1, "socket srecv");
664 freeaddrinfo(res);
665
666 /* set the source address if specified. */
667 if ((options & F_SRCADDR) != 0) {
668 /* properly fill sin6_scope_id */
669 if (IN6_IS_ADDR_LINKLOCAL(&src.sin6_addr) && (
670 IN6_IS_ADDR_LINKLOCAL(&dst.sin6_addr) ||
671 IN6_IS_ADDR_MC_LINKLOCAL(&dst.sin6_addr) ||
672 IN6_IS_ADDR_MC_NODELOCAL(&dst.sin6_addr))) {
673 if (src.sin6_scope_id == 0)
674 src.sin6_scope_id = dst.sin6_scope_id;
675 if (dst.sin6_scope_id == 0)
676 dst.sin6_scope_id = src.sin6_scope_id;
677 }
678 if (bind(ssend, (struct sockaddr *)&src, srclen) != 0)
679 err(1, "bind");
680 }
681 /* set the gateway (next hop) if specified */
682 if (gateway) {
683 memset(&hints, 0, sizeof(hints));
684 hints.ai_family = AF_INET6;
685 hints.ai_socktype = SOCK_RAW;
686 hints.ai_protocol = IPPROTO_ICMPV6;
687
688 error = cap_getaddrinfo(capdns, gateway, NULL, &hints, &res);
689 if (error) {
690 errx(1, "cap_getaddrinfo for the gateway %s: %s",
691 gateway, gai_strerror(error));
692 }
693 if (res->ai_next && (options & F_VERBOSE))
694 warnx("gateway resolves to multiple addresses");
695
696 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_NEXTHOP,
697 res->ai_addr, res->ai_addrlen)) {
698 err(1, "setsockopt(IPV6_NEXTHOP)");
699 }
700
701 freeaddrinfo(res);
702 }
703
704 /*
705 * let the kerel pass extension headers of incoming packets,
706 * for privileged socket options
707 */
708 if ((options & F_VERBOSE) != 0) {
709 int opton = 1;
710
711 #ifdef IPV6_RECVHOPOPTS
712 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
713 sizeof(opton)))
714 err(1, "setsockopt(IPV6_RECVHOPOPTS)");
715 #else /* old adv. API */
716 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
717 sizeof(opton)))
718 err(1, "setsockopt(IPV6_HOPOPTS)");
719 #endif
720 #ifdef IPV6_RECVDSTOPTS
721 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
722 sizeof(opton)))
723 err(1, "setsockopt(IPV6_RECVDSTOPTS)");
724 #else /* old adv. API */
725 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
726 sizeof(opton)))
727 err(1, "setsockopt(IPV6_DSTOPTS)");
728 #endif
729 #ifdef IPV6_RECVRTHDRDSTOPTS
730 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
731 sizeof(opton)))
732 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
733 #endif
734 }
735
736 /* revoke root privilege */
737 if (seteuid(getuid()) != 0)
738 err(1, "seteuid() failed");
739 if (setuid(getuid()) != 0)
740 err(1, "setuid() failed");
741
742 if ((options & F_FLOOD) && (options & F_INTERVAL))
743 errx(1, "-f and -i incompatible options");
744
745 if ((options & F_NOUSERDATA) == 0) {
746 if (datalen >= sizeof(struct tv32)) {
747 /* we can time transfer */
748 timing = 1;
749 } else
750 timing = 0;
751 /* in F_VERBOSE case, we may get non-echoreply packets*/
752 if (options & F_VERBOSE)
753 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
754 else
755 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
756 } else {
757 /* suppress timing for node information query */
758 timing = 0;
759 datalen = 2048;
760 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
761 }
762
763 if (!(packet = (u_char *)malloc((u_int)packlen)))
764 err(1, "Unable to allocate packet");
765 if (!(options & F_PINGFILLED))
766 for (i = ICMP6ECHOLEN; i < packlen; ++i)
767 *datap++ = i;
768
769 ident = getpid() & 0xFFFF;
770 arc4random_buf(nonce, sizeof(nonce));
771 optval = 1;
772 if (options & F_DONTFRAG)
773 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG,
774 &optval, sizeof(optval)) == -1)
775 err(1, "IPV6_DONTFRAG");
776 hold = 1;
777
778 if (options & F_SO_DEBUG) {
779 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold,
780 sizeof(hold));
781 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold,
782 sizeof(hold));
783 }
784 optval = IPV6_DEFHLIM;
785 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
786 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
787 &optval, sizeof(optval)) == -1)
788 err(1, "IPV6_MULTICAST_HOPS");
789 #ifdef IPV6_USE_MIN_MTU
790 if (mflag != 1) {
791 optval = mflag > 1 ? 0 : 1;
792
793 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
794 &optval, sizeof(optval)) == -1)
795 err(1, "setsockopt(IPV6_USE_MIN_MTU)");
796 }
797 #ifdef IPV6_RECVPATHMTU
798 else {
799 optval = 1;
800 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPATHMTU,
801 &optval, sizeof(optval)) == -1)
802 err(1, "setsockopt(IPV6_RECVPATHMTU)");
803 }
804 #endif /* IPV6_RECVPATHMTU */
805 #endif /* IPV6_USE_MIN_MTU */
806
807 #ifdef IPSEC
808 #ifdef IPSEC_POLICY_IPSEC
809 if (options & F_POLICY) {
810 if (setpolicy(srecv, policy_in) < 0)
811 errx(1, "%s", ipsec_strerror());
812 if (setpolicy(ssend, policy_out) < 0)
813 errx(1, "%s", ipsec_strerror());
814 }
815 #else
816 if (options & F_AUTHHDR) {
817 optval = IPSEC_LEVEL_REQUIRE;
818 #ifdef IPV6_AUTH_TRANS_LEVEL
819 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
820 &optval, sizeof(optval)) == -1)
821 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
822 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL,
823 &optval, sizeof(optval)) == -1)
824 err(1, "setsockopt(IPV6_AUTH_TRANS_LEVEL)");
825 #else /* old def */
826 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
827 &optval, sizeof(optval)) == -1)
828 err(1, "setsockopt(IPV6_AUTH_LEVEL)");
829 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_AUTH_LEVEL,
830 &optval, sizeof(optval)) == -1)
831 err(1, "setsockopt(IPV6_AUTH_LEVEL)");
832 #endif
833 }
834 if (options & F_ENCRYPT) {
835 optval = IPSEC_LEVEL_REQUIRE;
836 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
837 &optval, sizeof(optval)) == -1)
838 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
839 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL,
840 &optval, sizeof(optval)) == -1)
841 err(1, "setsockopt(IPV6_ESP_TRANS_LEVEL)");
842 }
843 #endif /*IPSEC_POLICY_IPSEC*/
844 #endif
845
846 #ifdef ICMP6_FILTER
847 {
848 struct icmp6_filter filt;
849 if (!(options & F_VERBOSE)) {
850 ICMP6_FILTER_SETBLOCKALL(&filt);
851 if ((options & F_FQDN) || (options & F_FQDNOLD) ||
852 (options & F_NODEADDR) || (options & F_SUPTYPES))
853 ICMP6_FILTER_SETPASS(ICMP6_NI_REPLY, &filt);
854 else
855 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
856 } else {
857 ICMP6_FILTER_SETPASSALL(&filt);
858 }
859 if (setsockopt(srecv, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
860 sizeof(filt)) < 0)
861 err(1, "setsockopt(ICMP6_FILTER)");
862 }
863 #endif /*ICMP6_FILTER*/
864
865 /* let the kerel pass extension headers of incoming packets */
866 if ((options & F_VERBOSE) != 0) {
867 int opton = 1;
868
869 #ifdef IPV6_RECVRTHDR
870 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
871 sizeof(opton)))
872 err(1, "setsockopt(IPV6_RECVRTHDR)");
873 #else /* old adv. API */
874 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RTHDR, &opton,
875 sizeof(opton)))
876 err(1, "setsockopt(IPV6_RTHDR)");
877 #endif
878 }
879
880 /*
881 optval = 1;
882 if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr))
883 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
884 &optval, sizeof(optval)) == -1)
885 err(1, "IPV6_MULTICAST_LOOP");
886 */
887
888 /* Specify the outgoing interface and/or the source address */
889 if (usepktinfo)
890 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
891
892 if (hoplimit != -1)
893 ip6optlen += CMSG_SPACE(sizeof(int));
894
895 /* set IP6 packet options */
896 if (ip6optlen) {
897 if ((scmsg = (char *)malloc(ip6optlen)) == NULL)
898 errx(1, "can't allocate enough memory");
899 smsghdr.msg_control = (caddr_t)scmsg;
900 smsghdr.msg_controllen = ip6optlen;
901 scmsgp = CMSG_FIRSTHDR(&smsghdr);
902 }
903 if (usepktinfo) {
904 cmsg_pktinfo = CMSG_DATA(scmsgp);
905 scmsgp->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
906 scmsgp->cmsg_level = IPPROTO_IPV6;
907 scmsgp->cmsg_type = IPV6_PKTINFO;
908 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
909 }
910
911 /* set the outgoing interface */
912 if (ifname) {
913 #ifndef USE_SIN6_SCOPE_ID
914 /* pktinfo must have already been allocated */
915 if ((pktinfo.ipi6_ifindex = if_nametoindex(ifname)) == 0)
916 errx(1, "%s: invalid interface name", ifname);
917 #else
918 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
919 errx(1, "%s: invalid interface name", ifname);
920 #endif
921 }
922 if (hoplimit != -1) {
923 scmsgp->cmsg_len = CMSG_LEN(sizeof(int));
924 scmsgp->cmsg_level = IPPROTO_IPV6;
925 scmsgp->cmsg_type = IPV6_HOPLIMIT;
926 memcpy(CMSG_DATA(scmsgp), &hoplimit, sizeof(hoplimit));
927
928 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
929 }
930
931 if (argc > 1) { /* some intermediate addrs are specified */
932 int hops;
933 int rthdrlen;
934
935 rthdrlen = inet6_rth_space(IPV6_RTHDR_TYPE_0, argc - 1);
936 scmsgp->cmsg_len = CMSG_LEN(rthdrlen);
937 scmsgp->cmsg_level = IPPROTO_IPV6;
938 scmsgp->cmsg_type = IPV6_RTHDR;
939 rthdr = (struct ip6_rthdr *)CMSG_DATA(scmsgp);
940 rthdr = inet6_rth_init((void *)rthdr, rthdrlen,
941 IPV6_RTHDR_TYPE_0, argc - 1);
942 if (rthdr == NULL)
943 errx(1, "can't initialize rthdr");
944
945 for (hops = 0; hops < argc - 1; hops++) {
946 memset(&hints, 0, sizeof(hints));
947 hints.ai_family = AF_INET6;
948
949 if ((error = cap_getaddrinfo(capdns, argv[hops], NULL, &hints,
950 &res)))
951 errx(1, "%s", gai_strerror(error));
952 if (res->ai_addr->sa_family != AF_INET6)
953 errx(1,
954 "bad addr family of an intermediate addr");
955 sin6 = (struct sockaddr_in6 *)(void *)res->ai_addr;
956 if (inet6_rth_add(rthdr, &sin6->sin6_addr))
957 errx(1, "can't add an intermediate node");
958 freeaddrinfo(res);
959 }
960
961 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
962 }
963
964 /* From now on we will use only reverse DNS lookups. */
965 #ifdef WITH_CASPER
966 if (capdns != NULL) {
967 const char *types[1];
968
969 types[0] = "ADDR2NAME";
970 if (cap_dns_type_limit(capdns, types, nitems(types)) < 0)
971 err(1, "unable to limit access to system.dns service");
972 }
973 #endif
974 if (!(options & F_SRCADDR)) {
975 /*
976 * get the source address. XXX since we revoked the root
977 * privilege, we cannot use a raw socket for this.
978 */
979 int dummy;
980 socklen_t len = sizeof(src);
981
982 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
983 err(1, "UDP socket");
984
985 src.sin6_family = AF_INET6;
986 src.sin6_addr = dst.sin6_addr;
987 src.sin6_port = ntohs(DUMMY_PORT);
988 src.sin6_scope_id = dst.sin6_scope_id;
989
990 if (usepktinfo &&
991 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
992 (void *)&pktinfo, sizeof(pktinfo)))
993 err(1, "UDP setsockopt(IPV6_PKTINFO)");
994
995 if (hoplimit != -1 &&
996 setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
997 (void *)&hoplimit, sizeof(hoplimit)))
998 err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)");
999
1000 if (hoplimit != -1 &&
1001 setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS,
1002 (void *)&hoplimit, sizeof(hoplimit)))
1003 err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)");
1004
1005 if (rthdr &&
1006 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
1007 (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
1008 err(1, "UDP setsockopt(IPV6_RTHDR)");
1009
1010 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
1011 err(1, "UDP connect");
1012
1013 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
1014 err(1, "getsockname");
1015
1016 close(dummy);
1017 }
1018
1019 /* Save pktinfo in the ancillary data. */
1020 if (usepktinfo)
1021 memcpy(cmsg_pktinfo, &pktinfo, sizeof(pktinfo));
1022
1023 if (connect(ssend, (struct sockaddr *)&dst, sizeof(dst)) != 0)
1024 err(1, "connect() ssend");
1025
1026 caph_cache_catpages();
1027 if (caph_enter_casper() < 0)
1028 err(1, "caph_enter_casper");
1029
1030 cap_rights_init(&rights_stdin);
1031 if (caph_rights_limit(STDIN_FILENO, &rights_stdin) < 0)
1032 err(1, "caph_rights_limit stdin");
1033 if (caph_limit_stdout() < 0)
1034 err(1, "caph_limit_stdout");
1035 if (caph_limit_stderr() < 0)
1036 err(1, "caph_limit_stderr");
1037
1038 cap_rights_init(&rights_srecv, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT);
1039 if (caph_rights_limit(srecv, &rights_srecv) < 0)
1040 err(1, "caph_rights_limit srecv");
1041 cap_rights_init(&rights_ssend, CAP_SEND, CAP_SETSOCKOPT);
1042 if (caph_rights_limit(ssend, &rights_ssend) < 0)
1043 err(1, "caph_rights_limit ssend");
1044
1045 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
1046 if (sockbufsize) {
1047 if (datalen > (size_t)sockbufsize)
1048 warnx("you need -b to increase socket buffer size");
1049 if (setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, &sockbufsize,
1050 sizeof(sockbufsize)) < 0)
1051 err(1, "setsockopt(SO_SNDBUF)");
1052 if (setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, &sockbufsize,
1053 sizeof(sockbufsize)) < 0)
1054 err(1, "setsockopt(SO_RCVBUF)");
1055 }
1056 else {
1057 if (datalen > 8 * 1024) /*XXX*/
1058 warnx("you need -b to increase socket buffer size");
1059 /*
1060 * When pinging the broadcast address, you can get a lot of
1061 * answers. Doing something so evil is useful if you are trying
1062 * to stress the ethernet, or just want to fill the arp cache
1063 * to get some stuff for /etc/ethers.
1064 */
1065 hold = 48 * 1024;
1066 setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
1067 sizeof(hold));
1068 }
1069 #endif
1070
1071 optval = 1;
1072 #ifndef USE_SIN6_SCOPE_ID
1073 #ifdef IPV6_RECVPKTINFO
1074 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval,
1075 sizeof(optval)) < 0)
1076 warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */
1077 #else /* old adv. API */
1078 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_PKTINFO, &optval,
1079 sizeof(optval)) < 0)
1080 warn("setsockopt(IPV6_PKTINFO)"); /* XXX err? */
1081 #endif
1082 #endif /* USE_SIN6_SCOPE_ID */
1083 #ifdef IPV6_RECVHOPLIMIT
1084 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval,
1085 sizeof(optval)) < 0)
1086 warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */
1087 #else /* old adv. API */
1088 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPLIMIT, &optval,
1089 sizeof(optval)) < 0)
1090 warn("setsockopt(IPV6_HOPLIMIT)"); /* XXX err? */
1091 #endif
1092
1093 cap_rights_clear(&rights_srecv, CAP_SETSOCKOPT);
1094 if (caph_rights_limit(srecv, &rights_srecv) < 0)
1095 err(1, "caph_rights_limit srecv setsockopt");
1096 cap_rights_clear(&rights_ssend, CAP_SETSOCKOPT);
1097 if (caph_rights_limit(ssend, &rights_ssend) < 0)
1098 err(1, "caph_rights_limit ssend setsockopt");
1099
1100 printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + pingerlen()),
1101 (unsigned long)(pingerlen() - 8));
1102 printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src)));
1103 printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst)));
1104
1105 if (preload == 0)
1106 pinger();
1107 else {
1108 if (npackets != 0 && preload > npackets)
1109 preload = npackets;
1110 while (preload--)
1111 pinger();
1112 }
1113 clock_gettime(CLOCK_MONOTONIC, &last);
1114
1115 sigemptyset(&si_sa.sa_mask);
1116 si_sa.sa_flags = 0;
1117 si_sa.sa_handler = onsignal;
1118 if (sigaction(SIGINT, &si_sa, 0) == -1)
1119 err(EX_OSERR, "sigaction SIGINT");
1120 seenint = 0;
1121 #ifdef SIGINFO
1122 if (sigaction(SIGINFO, &si_sa, 0) == -1)
1123 err(EX_OSERR, "sigaction SIGINFO");
1124 seeninfo = 0;
1125 #endif
1126 if (alarmtimeout > 0) {
1127 if (sigaction(SIGALRM, &si_sa, 0) == -1)
1128 err(EX_OSERR, "sigaction SIGALRM");
1129 }
1130 if (options & F_FLOOD) {
1131 intvl.tv_sec = 0;
1132 intvl.tv_nsec = 10000000;
1133 }
1134
1135 almost_done = 0;
1136 while (seenint == 0) {
1137 struct timespec now, timeout;
1138 struct msghdr m;
1139 struct iovec iov[2];
1140 fd_set rfds;
1141 int n;
1142
1143 /* signal handling */
1144 if (seenint)
1145 onint(SIGINT);
1146 #ifdef SIGINFO
1147 if (seeninfo) {
1148 summary();
1149 seeninfo = 0;
1150 continue;
1151 }
1152 #endif
1153 FD_ZERO(&rfds);
1154 FD_SET(srecv, &rfds);
1155 clock_gettime(CLOCK_MONOTONIC, &now);
1156 timespecadd(&last, &intvl, &timeout);
1157 timespecsub(&timeout, &now, &timeout);
1158 if (timeout.tv_sec < 0)
1159 timespecclear(&timeout);
1160
1161 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL);
1162 if (n < 0)
1163 continue; /* EINTR */
1164 if (n == 1) {
1165 m.msg_name = (caddr_t)&from;
1166 m.msg_namelen = sizeof(from);
1167 memset(&iov, 0, sizeof(iov));
1168 iov[0].iov_base = (caddr_t)packet;
1169 iov[0].iov_len = packlen;
1170 m.msg_iov = iov;
1171 m.msg_iovlen = 1;
1172 memset(cm, 0, CONTROLLEN);
1173 m.msg_control = (void *)cm;
1174 m.msg_controllen = CONTROLLEN;
1175
1176 cc = recvmsg(srecv, &m, 0);
1177 if (cc < 0) {
1178 if (errno != EINTR) {
1179 warn("recvmsg");
1180 sleep(1);
1181 }
1182 continue;
1183 } else if (cc == 0) {
1184 int mtu;
1185
1186 /*
1187 * receive control messages only. Process the
1188 * exceptions (currently the only possibility is
1189 * a path MTU notification.)
1190 */
1191 if ((mtu = get_pathmtu(&m)) > 0) {
1192 if ((options & F_VERBOSE) != 0) {
1193 printf("new path MTU (%d) is "
1194 "notified\n", mtu);
1195 }
1196 }
1197 continue;
1198 } else {
1199 /*
1200 * an ICMPv6 message (probably an echoreply)
1201 * arrived.
1202 */
1203 pr_pack(packet, cc, &m);
1204 }
1205 if (((options & F_ONCE) != 0 && nreceived > 0) ||
1206 (npackets > 0 && nreceived >= npackets))
1207 break;
1208 }
1209 if (n == 0 || (options & F_FLOOD)) {
1210 if (npackets == 0 || ntransmitted < npackets)
1211 pinger();
1212 else {
1213 if (almost_done)
1214 break;
1215 almost_done = 1;
1216 /*
1217 * If we're not transmitting any more packets,
1218 * change the timer to wait two round-trip times
1219 * if we've received any packets or (waittime)
1220 * milliseconds if we haven't.
1221 */
1222 intvl.tv_nsec = 0;
1223 if (nreceived) {
1224 intvl.tv_sec = 2 * tmax / 1000;
1225 if (intvl.tv_sec == 0)
1226 intvl.tv_sec = 1;
1227 } else {
1228 intvl.tv_sec = waittime / 1000;
1229 intvl.tv_nsec =
1230 waittime % 1000 * 1000000;
1231 }
1232 }
1233 clock_gettime(CLOCK_MONOTONIC, &last);
1234 if (ntransmitted - nreceived - 1 > nmissedmax) {
1235 nmissedmax = ntransmitted - nreceived - 1;
1236 if (options & F_MISSED)
1237 (void)write(STDOUT_FILENO, &BBELL, 1);
1238 }
1239 }
1240 }
1241 sigemptyset(&si_sa.sa_mask);
1242 si_sa.sa_flags = 0;
1243 si_sa.sa_handler = SIG_IGN;
1244 sigaction(SIGINT, &si_sa, 0);
1245 sigaction(SIGALRM, &si_sa, 0);
1246 summary();
1247
1248 if(packet != NULL)
1249 free(packet);
1250
1251 exit(nreceived == 0 ? 2 : 0);
1252 }
1253
1254 static void
onsignal(int sig)1255 onsignal(int sig)
1256 {
1257
1258 switch (sig) {
1259 case SIGINT:
1260 case SIGALRM:
1261 seenint++;
1262 break;
1263 #ifdef SIGINFO
1264 case SIGINFO:
1265 seeninfo++;
1266 break;
1267 #endif
1268 }
1269 }
1270
1271 /*
1272 * pinger --
1273 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1274 * will be added on by the kernel. The ID field is our UNIX process ID,
1275 * and the sequence number is an ascending integer. The first 8 bytes
1276 * of the data portion are used to hold a UNIX "timespec" struct in VAX
1277 * byte-order, to compute the round-trip time.
1278 */
1279 static size_t
pingerlen(void)1280 pingerlen(void)
1281 {
1282 size_t l;
1283
1284 if (options & F_FQDN)
1285 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1286 else if (options & F_FQDNOLD)
1287 l = ICMP6_NIQLEN;
1288 else if (options & F_NODEADDR)
1289 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1290 else if (options & F_SUPTYPES)
1291 l = ICMP6_NIQLEN;
1292 else
1293 l = ICMP6ECHOLEN + datalen;
1294
1295 return l;
1296 }
1297
1298 static int
pinger(void)1299 pinger(void)
1300 {
1301 struct icmp6_hdr *icp;
1302 struct iovec iov[2];
1303 int i, cc;
1304 struct icmp6_nodeinfo *nip;
1305 uint16_t seq;
1306
1307 if (npackets && ntransmitted >= npackets)
1308 return(-1); /* no more transmission */
1309
1310 icp = (struct icmp6_hdr *)outpack;
1311 nip = (struct icmp6_nodeinfo *)outpack;
1312 memset(icp, 0, sizeof(*icp));
1313 icp->icmp6_cksum = 0;
1314 seq = ntransmitted++;
1315 CLR(seq % mx_dup_ck);
1316
1317 if (options & F_FQDN) {
1318 uint16_t s;
1319
1320 icp->icmp6_type = ICMP6_NI_QUERY;
1321 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1322 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1323 nip->ni_flags = htons(0);
1324
1325 memcpy(nip->icmp6_ni_nonce, nonce,
1326 sizeof(nip->icmp6_ni_nonce));
1327 s = htons(seq);
1328 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1329
1330 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1331 sizeof(dst.sin6_addr));
1332 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1333 datalen = 0;
1334 } else if (options & F_FQDNOLD) {
1335 uint16_t s;
1336 /* packet format in 03 draft - no Subject data on queries */
1337 icp->icmp6_type = ICMP6_NI_QUERY;
1338 icp->icmp6_code = 0; /* code field is always 0 */
1339 nip->ni_qtype = htons(NI_QTYPE_FQDN);
1340 nip->ni_flags = htons(0);
1341
1342 memcpy(nip->icmp6_ni_nonce, nonce,
1343 sizeof(nip->icmp6_ni_nonce));
1344 s = htons(seq);
1345 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1346
1347 cc = ICMP6_NIQLEN;
1348 datalen = 0;
1349 } else if (options & F_NODEADDR) {
1350 uint16_t s;
1351
1352 icp->icmp6_type = ICMP6_NI_QUERY;
1353 icp->icmp6_code = ICMP6_NI_SUBJ_IPV6;
1354 nip->ni_qtype = htons(NI_QTYPE_NODEADDR);
1355 nip->ni_flags = naflags;
1356
1357 memcpy(nip->icmp6_ni_nonce, nonce,
1358 sizeof(nip->icmp6_ni_nonce));
1359 s = htons(seq);
1360 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1361
1362 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1363 sizeof(dst.sin6_addr));
1364 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1365 datalen = 0;
1366 } else if (options & F_SUPTYPES) {
1367 uint16_t s;
1368
1369 icp->icmp6_type = ICMP6_NI_QUERY;
1370 icp->icmp6_code = ICMP6_NI_SUBJ_FQDN; /*empty*/
1371 nip->ni_qtype = htons(NI_QTYPE_SUPTYPES);
1372 /* we support compressed bitmap */
1373 nip->ni_flags = NI_SUPTYPE_FLAG_COMPRESS;
1374
1375 memcpy(nip->icmp6_ni_nonce, nonce,
1376 sizeof(nip->icmp6_ni_nonce));
1377 s = htons(seq);
1378 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1379
1380 cc = ICMP6_NIQLEN;
1381 datalen = 0;
1382 } else {
1383 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1384 icp->icmp6_code = 0;
1385 icp->icmp6_id = htons(ident);
1386 icp->icmp6_seq = htons(seq);
1387 if (timing) {
1388 struct timespec tv;
1389 struct tv32 tv32;
1390 (void)clock_gettime(CLOCK_MONOTONIC, &tv);
1391 /*
1392 * Truncate seconds down to 32 bits in order
1393 * to fit the timestamp within 8 bytes of the
1394 * packet. We're only concerned with
1395 * durations, not absolute times.
1396 */
1397 tv32.tv32_sec = (uint32_t)htonl(tv.tv_sec);
1398 tv32.tv32_nsec = (uint32_t)htonl(tv.tv_nsec);
1399 memcpy(&outpack[ICMP6ECHOLEN], &tv32, sizeof(tv32));
1400 }
1401 cc = ICMP6ECHOLEN + datalen;
1402 }
1403
1404 #ifdef DIAGNOSTIC
1405 if (pingerlen() != cc)
1406 errx(1, "internal error; length mismatch");
1407 #endif
1408
1409 memset(&iov, 0, sizeof(iov));
1410 iov[0].iov_base = (caddr_t)outpack;
1411 iov[0].iov_len = cc;
1412 smsghdr.msg_iov = iov;
1413 smsghdr.msg_iovlen = 1;
1414
1415 i = sendmsg(ssend, &smsghdr, 0);
1416
1417 if (i < 0 || i != cc) {
1418 if (i < 0)
1419 warn("sendmsg");
1420 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1421 hostname, cc, i);
1422 }
1423 if (!(options & F_QUIET) && options & F_FLOOD)
1424 (void)write(STDOUT_FILENO, &DOT, 1);
1425
1426 return(0);
1427 }
1428
1429 static int
myechoreply(const struct icmp6_hdr * icp)1430 myechoreply(const struct icmp6_hdr *icp)
1431 {
1432 if (ntohs(icp->icmp6_id) == ident)
1433 return 1;
1434 else
1435 return 0;
1436 }
1437
1438 static int
mynireply(const struct icmp6_nodeinfo * nip)1439 mynireply(const struct icmp6_nodeinfo *nip)
1440 {
1441 if (memcmp(nip->icmp6_ni_nonce + sizeof(u_int16_t),
1442 nonce + sizeof(u_int16_t),
1443 sizeof(nonce) - sizeof(u_int16_t)) == 0)
1444 return 1;
1445 else
1446 return 0;
1447 }
1448
1449 /*
1450 * Decode a name from a DNS message.
1451 *
1452 * Format of the message is described in RFC 1035 subsection 4.1.4.
1453 *
1454 * Arguments:
1455 * sp - Pointer to a DNS pointer octet or to the first octet of a label
1456 * in the message.
1457 * ep - Pointer to the end of the message (one step past the last octet).
1458 * base - Pointer to the beginning of the message.
1459 * buf - Buffer into which the decoded name will be saved.
1460 * bufsiz - Size of the buffer 'buf'.
1461 *
1462 * Return value:
1463 * Pointer to an octet immediately following the ending zero octet
1464 * of the decoded label, or NULL if an error occured.
1465 */
1466 static const char *
dnsdecode(const u_char * sp,const u_char * ep,const u_char * base,char * buf,size_t bufsiz)1467 dnsdecode(const u_char *sp, const u_char *ep, const u_char *base, char *buf,
1468 size_t bufsiz)
1469 {
1470 int i;
1471 const u_char *cp;
1472 char cresult[MAXDNAME + 1];
1473 const u_char *comp;
1474 int l;
1475
1476 cp = sp;
1477 *buf = '\0';
1478
1479 if (cp >= ep)
1480 return NULL;
1481 while (cp < ep) {
1482 i = *cp;
1483 if (i == 0 || cp != sp) {
1484 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1485 return NULL; /*result overrun*/
1486 }
1487 if (i == 0)
1488 break;
1489 cp++;
1490
1491 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1492 /* DNS compression */
1493 if (!base)
1494 return NULL;
1495
1496 comp = base + (i & 0x3f);
1497 if (dnsdecode(comp, cp, base, cresult,
1498 sizeof(cresult)) == NULL)
1499 return NULL;
1500 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1501 return NULL; /*result overrun*/
1502 break;
1503 } else if ((i & 0x3f) == i) {
1504 if (i > ep - cp)
1505 return NULL; /*source overrun*/
1506 while (i-- > 0 && cp < ep) {
1507 l = snprintf(cresult, sizeof(cresult),
1508 isprint(*cp) ? "%c" : "\\%03o", *cp & 0xff);
1509 if ((size_t)l >= sizeof(cresult) || l < 0)
1510 return NULL;
1511 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1512 return NULL; /*result overrun*/
1513 cp++;
1514 }
1515 } else
1516 return NULL; /*invalid label*/
1517 }
1518 if (i != 0)
1519 return NULL; /*not terminated*/
1520 cp++;
1521 return cp;
1522 }
1523
1524 /*
1525 * pr_pack --
1526 * Print out the packet, if it came from us. This logic is necessary
1527 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1528 * which arrive ('tis only fair). This permits multiple copies of this
1529 * program to be run without having intermingled output (or statistics!).
1530 */
1531 static void
pr_pack(u_char * buf,int cc,struct msghdr * mhdr)1532 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1533 {
1534 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
1535 struct icmp6_hdr *icp;
1536 struct icmp6_nodeinfo *ni;
1537 int i;
1538 int hoplim;
1539 struct sockaddr *from;
1540 int fromlen;
1541 const u_char *cp = NULL;
1542 u_char *dp, *end = buf + cc;
1543 struct in6_pktinfo *pktinfo = NULL;
1544 struct timespec tv, tp;
1545 struct tv32 tpp;
1546 double triptime = 0;
1547 int dupflag;
1548 size_t off;
1549 int oldfqdn;
1550 u_int16_t seq;
1551 char dnsname[MAXDNAME + 1];
1552
1553 (void)clock_gettime(CLOCK_MONOTONIC, &tv);
1554
1555 if (!mhdr || !mhdr->msg_name ||
1556 mhdr->msg_namelen != sizeof(struct sockaddr_in6) ||
1557 ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) {
1558 if (options & F_VERBOSE)
1559 warnx("invalid peername");
1560 return;
1561 }
1562 from = (struct sockaddr *)mhdr->msg_name;
1563 fromlen = mhdr->msg_namelen;
1564 if (cc < (int)sizeof(struct icmp6_hdr)) {
1565 if (options & F_VERBOSE)
1566 warnx("packet too short (%d bytes) from %s", cc,
1567 pr_addr(from, fromlen));
1568 return;
1569 }
1570 if (((mhdr->msg_flags & MSG_CTRUNC) != 0) &&
1571 (options & F_VERBOSE) != 0)
1572 warnx("some control data discarded, insufficient buffer size");
1573 icp = (struct icmp6_hdr *)buf;
1574 ni = (struct icmp6_nodeinfo *)buf;
1575 off = 0;
1576
1577 if ((hoplim = get_hoplim(mhdr)) == -1) {
1578 warnx("failed to get receiving hop limit");
1579 return;
1580 }
1581 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1582 warnx("failed to get receiving packet information");
1583 return;
1584 }
1585
1586 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1587 seq = ntohs(icp->icmp6_seq);
1588 ++nreceived;
1589 if (timing) {
1590 memcpy(&tpp, icp + 1, sizeof(tpp));
1591 tp.tv_sec = ntohl(tpp.tv32_sec);
1592 tp.tv_nsec = ntohl(tpp.tv32_nsec);
1593 timespecsub(&tv, &tp, &tv);
1594 triptime = ((double)tv.tv_sec) * 1000.0 +
1595 ((double)tv.tv_nsec) / 1000000.0;
1596 tsum += triptime;
1597 tsumsq += triptime * triptime;
1598 if (triptime < tmin)
1599 tmin = triptime;
1600 if (triptime > tmax)
1601 tmax = triptime;
1602 }
1603
1604 if (TST(seq % mx_dup_ck)) {
1605 ++nrepeats;
1606 --nreceived;
1607 dupflag = 1;
1608 } else {
1609 SET(seq % mx_dup_ck);
1610 dupflag = 0;
1611 }
1612
1613 if (options & F_QUIET)
1614 return;
1615
1616 if (options & F_WAITTIME && triptime > waittime) {
1617 ++nrcvtimeout;
1618 return;
1619 }
1620
1621 if (options & F_FLOOD)
1622 (void)write(STDOUT_FILENO, &BSPACE, 1);
1623 else {
1624 if (options & F_AUDIBLE)
1625 (void)write(STDOUT_FILENO, &BBELL, 1);
1626 (void)printf("%d bytes from %s, icmp_seq=%u", cc,
1627 pr_addr(from, fromlen), seq);
1628 (void)printf(" hlim=%d", hoplim);
1629 if ((options & F_VERBOSE) != 0) {
1630 struct sockaddr_in6 dstsa;
1631
1632 memset(&dstsa, 0, sizeof(dstsa));
1633 dstsa.sin6_family = AF_INET6;
1634 dstsa.sin6_len = sizeof(dstsa);
1635 dstsa.sin6_scope_id = pktinfo->ipi6_ifindex;
1636 dstsa.sin6_addr = pktinfo->ipi6_addr;
1637 (void)printf(" dst=%s",
1638 pr_addr((struct sockaddr *)&dstsa,
1639 sizeof(dstsa)));
1640 }
1641 if (timing)
1642 (void)printf(" time=%.3f ms", triptime);
1643 if (dupflag)
1644 (void)printf("(DUP!)");
1645 /* check the data */
1646 cp = buf + off + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1647 dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN;
1648 for (i = 8; cp < end; ++i, ++cp, ++dp) {
1649 if (*cp != *dp) {
1650 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1651 break;
1652 }
1653 }
1654 }
1655 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1656 memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq));
1657 seq = ntohs(seq);
1658 ++nreceived;
1659 if (TST(seq % mx_dup_ck)) {
1660 ++nrepeats;
1661 --nreceived;
1662 dupflag = 1;
1663 } else {
1664 SET(seq % mx_dup_ck);
1665 dupflag = 0;
1666 }
1667
1668 if (options & F_QUIET)
1669 return;
1670
1671 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1672
1673 switch (ntohs(ni->ni_code)) {
1674 case ICMP6_NI_SUCCESS:
1675 break;
1676 case ICMP6_NI_REFUSED:
1677 printf("refused, type 0x%x", ntohs(ni->ni_type));
1678 goto fqdnend;
1679 case ICMP6_NI_UNKNOWN:
1680 printf("unknown, type 0x%x", ntohs(ni->ni_type));
1681 goto fqdnend;
1682 default:
1683 printf("unknown code 0x%x, type 0x%x",
1684 ntohs(ni->ni_code), ntohs(ni->ni_type));
1685 goto fqdnend;
1686 }
1687
1688 switch (ntohs(ni->ni_qtype)) {
1689 case NI_QTYPE_NOOP:
1690 printf("NodeInfo NOOP");
1691 break;
1692 case NI_QTYPE_SUPTYPES:
1693 pr_suptypes(ni, end - (u_char *)ni);
1694 break;
1695 case NI_QTYPE_NODEADDR:
1696 pr_nodeaddr(ni, end - (u_char *)ni);
1697 break;
1698 case NI_QTYPE_FQDN:
1699 default: /* XXX: for backward compatibility */
1700 cp = (u_char *)ni + ICMP6_NIRLEN;
1701 if (buf[off + ICMP6_NIRLEN] ==
1702 cc - off - ICMP6_NIRLEN - 1)
1703 oldfqdn = 1;
1704 else
1705 oldfqdn = 0;
1706 if (oldfqdn) {
1707 cp++; /* skip length */
1708 while (cp < end) {
1709 safeputc(*cp & 0xff);
1710 cp++;
1711 }
1712 } else {
1713 i = 0;
1714 while (cp < end) {
1715 cp = dnsdecode((const u_char *)cp, end,
1716 (const u_char *)(ni + 1), dnsname,
1717 sizeof(dnsname));
1718 if (cp == NULL) {
1719 printf("???");
1720 break;
1721 }
1722 /*
1723 * name-lookup special handling for
1724 * truncated name
1725 */
1726 if (cp + 1 <= end && !*cp &&
1727 strlen(dnsname) > 0) {
1728 dnsname[strlen(dnsname) - 1] = '\0';
1729 cp++;
1730 }
1731 printf("%s%s", i > 0 ? "," : "",
1732 dnsname);
1733 }
1734 }
1735 if (options & F_VERBOSE) {
1736 u_long t;
1737 int32_t ttl;
1738 int comma = 0;
1739
1740 (void)printf(" ("); /*)*/
1741
1742 switch (ni->ni_code) {
1743 case ICMP6_NI_REFUSED:
1744 (void)printf("refused");
1745 comma++;
1746 break;
1747 case ICMP6_NI_UNKNOWN:
1748 (void)printf("unknown qtype");
1749 comma++;
1750 break;
1751 }
1752
1753 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1754 /* case of refusion, unknown */
1755 /*(*/
1756 putchar(')');
1757 goto fqdnend;
1758 }
1759 memcpy(&t, &buf[off+ICMP6ECHOLEN+8], sizeof(t));
1760 ttl = (int32_t)ntohl(t);
1761 if (comma)
1762 printf(",");
1763 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1764 (void)printf("TTL=%d:meaningless",
1765 (int)ttl);
1766 } else {
1767 if (ttl < 0) {
1768 (void)printf("TTL=%d:invalid",
1769 ttl);
1770 } else
1771 (void)printf("TTL=%d", ttl);
1772 }
1773 comma++;
1774
1775 if (oldfqdn) {
1776 if (comma)
1777 printf(",");
1778 printf("03 draft");
1779 comma++;
1780 } else {
1781 cp = (u_char *)ni + ICMP6_NIRLEN;
1782 if (cp == end) {
1783 if (comma)
1784 printf(",");
1785 printf("no name");
1786 comma++;
1787 }
1788 }
1789
1790 if (buf[off + ICMP6_NIRLEN] !=
1791 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1792 if (comma)
1793 printf(",");
1794 (void)printf("invalid namelen:%d/%lu",
1795 buf[off + ICMP6_NIRLEN],
1796 (u_long)cc - off - ICMP6_NIRLEN - 1);
1797 comma++;
1798 }
1799 /*(*/
1800 putchar(')');
1801 }
1802 fqdnend:
1803 ;
1804 }
1805 } else {
1806 /* We've got something other than an ECHOREPLY */
1807 if (!(options & F_VERBOSE))
1808 return;
1809 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1810 pr_icmph(icp, end);
1811 }
1812
1813 if (!(options & F_FLOOD)) {
1814 (void)putchar('\n');
1815 if (options & F_VERBOSE)
1816 pr_exthdrs(mhdr);
1817 (void)fflush(stdout);
1818 }
1819 #undef safeputc
1820 }
1821
1822 static void
pr_exthdrs(struct msghdr * mhdr)1823 pr_exthdrs(struct msghdr *mhdr)
1824 {
1825 ssize_t bufsize;
1826 void *bufp;
1827 struct cmsghdr *cm;
1828
1829 bufsize = 0;
1830 bufp = mhdr->msg_control;
1831 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
1832 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
1833 if (cm->cmsg_level != IPPROTO_IPV6)
1834 continue;
1835
1836 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1837 if (bufsize <= 0)
1838 continue;
1839 switch (cm->cmsg_type) {
1840 case IPV6_HOPOPTS:
1841 printf(" HbH Options: ");
1842 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1843 break;
1844 case IPV6_DSTOPTS:
1845 #ifdef IPV6_RTHDRDSTOPTS
1846 case IPV6_RTHDRDSTOPTS:
1847 #endif
1848 printf(" Dst Options: ");
1849 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1850 break;
1851 case IPV6_RTHDR:
1852 printf(" Routing: ");
1853 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1854 break;
1855 }
1856 }
1857 }
1858
1859 static void
pr_ip6opt(void * extbuf,size_t bufsize)1860 pr_ip6opt(void *extbuf, size_t bufsize)
1861 {
1862 struct ip6_hbh *ext;
1863 int currentlen;
1864 u_int8_t type;
1865 socklen_t extlen, len;
1866 void *databuf;
1867 size_t offset;
1868 u_int16_t value2;
1869 u_int32_t value4;
1870
1871 ext = (struct ip6_hbh *)extbuf;
1872 extlen = (ext->ip6h_len + 1) * 8;
1873 printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt,
1874 (unsigned int)ext->ip6h_len, (unsigned long)extlen);
1875
1876 /*
1877 * Bounds checking on the ancillary data buffer:
1878 * subtract the size of a cmsg structure from the buffer size.
1879 */
1880 if (bufsize < (extlen + CMSG_SPACE(0))) {
1881 extlen = bufsize - CMSG_SPACE(0);
1882 warnx("options truncated, showing only %u (total=%u)",
1883 (unsigned int)(extlen / 8 - 1),
1884 (unsigned int)(ext->ip6h_len));
1885 }
1886
1887 currentlen = 0;
1888 while (1) {
1889 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1890 &type, &len, &databuf);
1891 if (currentlen == -1)
1892 break;
1893 switch (type) {
1894 /*
1895 * Note that inet6_opt_next automatically skips any padding
1896 * optins.
1897 */
1898 case IP6OPT_JUMBO:
1899 offset = 0;
1900 offset = inet6_opt_get_val(databuf, offset,
1901 &value4, sizeof(value4));
1902 printf(" Jumbo Payload Opt: Length %u\n",
1903 (u_int32_t)ntohl(value4));
1904 break;
1905 case IP6OPT_ROUTER_ALERT:
1906 offset = 0;
1907 offset = inet6_opt_get_val(databuf, offset,
1908 &value2, sizeof(value2));
1909 printf(" Router Alert Opt: Type %u\n",
1910 ntohs(value2));
1911 break;
1912 default:
1913 printf(" Received Opt %u len %lu\n",
1914 type, (unsigned long)len);
1915 break;
1916 }
1917 }
1918 return;
1919 }
1920
1921 static void
pr_rthdr(void * extbuf,size_t bufsize)1922 pr_rthdr(void *extbuf, size_t bufsize)
1923 {
1924 struct in6_addr *in6;
1925 char ntopbuf[INET6_ADDRSTRLEN];
1926 struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf;
1927 int i, segments, origsegs, rthsize, size0, size1;
1928
1929 /* print fixed part of the header */
1930 printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt,
1931 rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type);
1932 if ((segments = inet6_rth_segments(extbuf)) >= 0) {
1933 printf("%d segments, ", segments);
1934 printf("%d left\n", rh->ip6r_segleft);
1935 } else {
1936 printf("segments unknown, ");
1937 printf("%d left\n", rh->ip6r_segleft);
1938 return;
1939 }
1940
1941 /*
1942 * Bounds checking on the ancillary data buffer. When calculating
1943 * the number of items to show keep in mind:
1944 * - The size of the cmsg structure
1945 * - The size of one segment (the size of a Type 0 routing header)
1946 * - When dividing add a fudge factor of one in case the
1947 * dividend is not evenly divisible by the divisor
1948 */
1949 rthsize = (rh->ip6r_len + 1) * 8;
1950 if (bufsize < (rthsize + CMSG_SPACE(0))) {
1951 origsegs = segments;
1952 size0 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 0);
1953 size1 = inet6_rth_space(IPV6_RTHDR_TYPE_0, 1);
1954 segments -= (rthsize - (bufsize - CMSG_SPACE(0))) /
1955 (size1 - size0) + 1;
1956 warnx("segments truncated, showing only %d (total=%d)",
1957 segments, origsegs);
1958 }
1959
1960 for (i = 0; i < segments; i++) {
1961 in6 = inet6_rth_getaddr(extbuf, i);
1962 if (in6 == NULL)
1963 printf(" [%d]<NULL>\n", i);
1964 else {
1965 if (!inet_ntop(AF_INET6, in6, ntopbuf,
1966 sizeof(ntopbuf)))
1967 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1968 printf(" [%d]%s\n", i, ntopbuf);
1969 }
1970 }
1971
1972 return;
1973
1974 }
1975
1976 static int
pr_bitrange(u_int32_t v,int soff,int ii)1977 pr_bitrange(u_int32_t v, int soff, int ii)
1978 {
1979 int off;
1980 int i;
1981
1982 off = 0;
1983 while (off < 32) {
1984 /* shift till we have 0x01 */
1985 if ((v & 0x01) == 0) {
1986 if (ii > 1)
1987 printf("-%u", soff + off - 1);
1988 ii = 0;
1989 switch (v & 0x0f) {
1990 case 0x00:
1991 v >>= 4;
1992 off += 4;
1993 continue;
1994 case 0x08:
1995 v >>= 3;
1996 off += 3;
1997 continue;
1998 case 0x04: case 0x0c:
1999 v >>= 2;
2000 off += 2;
2001 continue;
2002 default:
2003 v >>= 1;
2004 off += 1;
2005 continue;
2006 }
2007 }
2008
2009 /* we have 0x01 with us */
2010 for (i = 0; i < 32 - off; i++) {
2011 if ((v & (0x01 << i)) == 0)
2012 break;
2013 }
2014 if (!ii)
2015 printf(" %u", soff + off);
2016 ii += i;
2017 v >>= i; off += i;
2018 }
2019 return ii;
2020 }
2021
2022 static void
pr_suptypes(struct icmp6_nodeinfo * ni,size_t nilen)2023 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
2024 /* ni->qtype must be SUPTYPES */
2025 {
2026 size_t clen;
2027 u_int32_t v;
2028 const u_char *cp, *end;
2029 u_int16_t cur;
2030 struct cbit {
2031 u_int16_t words; /*32bit count*/
2032 u_int16_t skip;
2033 } cbit;
2034 #define MAXQTYPES (1 << 16)
2035 size_t off;
2036 int b;
2037
2038 cp = (u_char *)(ni + 1);
2039 end = ((u_char *)ni) + nilen;
2040 cur = 0;
2041 b = 0;
2042
2043 printf("NodeInfo Supported Qtypes");
2044 if (options & F_VERBOSE) {
2045 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2046 printf(", compressed bitmap");
2047 else
2048 printf(", raw bitmap");
2049 }
2050
2051 while (cp < end) {
2052 clen = (size_t)(end - cp);
2053 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2054 if (clen == 0 || clen > MAXQTYPES / 8 ||
2055 clen % sizeof(v)) {
2056 printf("???");
2057 return;
2058 }
2059 } else {
2060 if (clen < sizeof(cbit) || clen % sizeof(v))
2061 return;
2062 memcpy(&cbit, cp, sizeof(cbit));
2063 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2064 clen)
2065 return;
2066 cp += sizeof(cbit);
2067 clen = ntohs(cbit.words) * sizeof(v);
2068 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
2069 MAXQTYPES)
2070 return;
2071 }
2072
2073 for (off = 0; off < clen; off += sizeof(v)) {
2074 memcpy(&v, cp + off, sizeof(v));
2075 v = (u_int32_t)ntohl(v);
2076 b = pr_bitrange(v, (int)(cur + off * 8), b);
2077 }
2078 /* flush the remaining bits */
2079 b = pr_bitrange(0, (int)(cur + off * 8), b);
2080
2081 cp += clen;
2082 cur += clen * 8;
2083 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2084 cur += ntohs(cbit.skip) * 32;
2085 }
2086 }
2087
2088 static void
pr_nodeaddr(struct icmp6_nodeinfo * ni,int nilen)2089 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2090 /* ni->qtype must be NODEADDR */
2091 {
2092 u_char *cp = (u_char *)(ni + 1);
2093 char ntop_buf[INET6_ADDRSTRLEN];
2094 int withttl = 0;
2095
2096 nilen -= sizeof(struct icmp6_nodeinfo);
2097
2098 if (options & F_VERBOSE) {
2099 switch (ni->ni_code) {
2100 case ICMP6_NI_REFUSED:
2101 (void)printf("refused");
2102 break;
2103 case ICMP6_NI_UNKNOWN:
2104 (void)printf("unknown qtype");
2105 break;
2106 }
2107 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2108 (void)printf(" truncated");
2109 }
2110 putchar('\n');
2111 if (nilen <= 0)
2112 printf(" no address\n");
2113
2114 /*
2115 * In icmp-name-lookups 05 and later, TTL of each returned address
2116 * is contained in the resposne. We try to detect the version
2117 * by the length of the data, but note that the detection algorithm
2118 * is incomplete. We assume the latest draft by default.
2119 */
2120 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
2121 withttl = 1;
2122 while (nilen > 0) {
2123 u_int32_t ttl = 0;
2124
2125 if (withttl) {
2126 uint32_t t;
2127
2128 memcpy(&t, cp, sizeof(t));
2129 ttl = (u_int32_t)ntohl(t);
2130 cp += sizeof(u_int32_t);
2131 nilen -= sizeof(u_int32_t);
2132 }
2133
2134 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2135 NULL)
2136 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2137 printf(" %s", ntop_buf);
2138 if (withttl) {
2139 if (ttl == 0xffffffff) {
2140 /*
2141 * XXX: can this convention be applied to all
2142 * type of TTL (i.e. non-ND TTL)?
2143 */
2144 printf("(TTL=infty)");
2145 }
2146 else
2147 printf("(TTL=%u)", ttl);
2148 }
2149 putchar('\n');
2150
2151 nilen -= sizeof(struct in6_addr);
2152 cp += sizeof(struct in6_addr);
2153 }
2154 }
2155
2156 static int
get_hoplim(struct msghdr * mhdr)2157 get_hoplim(struct msghdr *mhdr)
2158 {
2159 struct cmsghdr *cm;
2160
2161 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2162 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2163 if (cm->cmsg_len == 0)
2164 return(-1);
2165
2166 if (cm->cmsg_level == IPPROTO_IPV6 &&
2167 cm->cmsg_type == IPV6_HOPLIMIT &&
2168 cm->cmsg_len == CMSG_LEN(sizeof(int))) {
2169 int r;
2170
2171 memcpy(&r, CMSG_DATA(cm), sizeof(r));
2172 return(r);
2173 }
2174 }
2175
2176 return(-1);
2177 }
2178
2179 static struct in6_pktinfo *
get_rcvpktinfo(struct msghdr * mhdr)2180 get_rcvpktinfo(struct msghdr *mhdr)
2181 {
2182 static struct in6_pktinfo pi;
2183 struct cmsghdr *cm;
2184
2185 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2186 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2187 if (cm->cmsg_len == 0)
2188 return(NULL);
2189
2190 if (cm->cmsg_level == IPPROTO_IPV6 &&
2191 cm->cmsg_type == IPV6_PKTINFO &&
2192 cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) {
2193 memcpy(&pi, CMSG_DATA(cm), sizeof(pi));
2194 return(&pi);
2195 }
2196 }
2197
2198 return(NULL);
2199 }
2200
2201 static int
get_pathmtu(struct msghdr * mhdr)2202 get_pathmtu(struct msghdr *mhdr)
2203 {
2204 #ifdef IPV6_RECVPATHMTU
2205 struct cmsghdr *cm;
2206 struct ip6_mtuinfo mtuctl;
2207
2208 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2209 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2210 if (cm->cmsg_len == 0)
2211 return(0);
2212
2213 if (cm->cmsg_level == IPPROTO_IPV6 &&
2214 cm->cmsg_type == IPV6_PATHMTU &&
2215 cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) {
2216 memcpy(&mtuctl, CMSG_DATA(cm), sizeof(mtuctl));
2217
2218 /*
2219 * If the notified destination is different from
2220 * the one we are pinging, just ignore the info.
2221 * We check the scope ID only when both notified value
2222 * and our own value have non-0 values, because we may
2223 * have used the default scope zone ID for sending,
2224 * in which case the scope ID value is 0.
2225 */
2226 if (!IN6_ARE_ADDR_EQUAL(&mtuctl.ip6m_addr.sin6_addr,
2227 &dst.sin6_addr) ||
2228 (mtuctl.ip6m_addr.sin6_scope_id &&
2229 dst.sin6_scope_id &&
2230 mtuctl.ip6m_addr.sin6_scope_id !=
2231 dst.sin6_scope_id)) {
2232 if ((options & F_VERBOSE) != 0) {
2233 printf("path MTU for %s is notified. "
2234 "(ignored)\n",
2235 pr_addr((struct sockaddr *)&mtuctl.ip6m_addr,
2236 sizeof(mtuctl.ip6m_addr)));
2237 }
2238 return(0);
2239 }
2240
2241 /*
2242 * Ignore an invalid MTU. XXX: can we just believe
2243 * the kernel check?
2244 */
2245 if (mtuctl.ip6m_mtu < IPV6_MMTU)
2246 return(0);
2247
2248 /* notification for our destination. return the MTU. */
2249 return((int)mtuctl.ip6m_mtu);
2250 }
2251 }
2252 #endif
2253 return(0);
2254 }
2255
2256 /*
2257 * onint --
2258 * SIGINT handler.
2259 */
2260 /* ARGSUSED */
2261 static void
onint(int notused __unused)2262 onint(int notused __unused)
2263 {
2264 /*
2265 * When doing reverse DNS lookups, the seenint flag might not
2266 * be noticed for a while. Just exit if we get a second SIGINT.
2267 */
2268 if ((options & F_HOSTNAME) && seenint != 0)
2269 _exit(nreceived ? 0 : 2);
2270 }
2271
2272 /*
2273 * summary --
2274 * Print out statistics.
2275 */
2276 static void
summary(void)2277 summary(void)
2278 {
2279
2280 (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2281 (void)printf("%ld packets transmitted, ", ntransmitted);
2282 (void)printf("%ld packets received, ", nreceived);
2283 if (nrepeats)
2284 (void)printf("+%ld duplicates, ", nrepeats);
2285 if (ntransmitted) {
2286 if (nreceived > ntransmitted)
2287 (void)printf("-- somebody's duplicating packets!");
2288 else
2289 (void)printf("%.1f%% packet loss",
2290 ((((double)ntransmitted - nreceived) * 100.0) /
2291 ntransmitted));
2292 }
2293 if (nrcvtimeout)
2294 printf(", %ld packets out of wait time", nrcvtimeout);
2295 (void)putchar('\n');
2296 if (nreceived && timing) {
2297 /* Only display average to microseconds */
2298 double num = nreceived + nrepeats;
2299 double avg = tsum / num;
2300 double dev = sqrt(tsumsq / num - avg * avg);
2301 (void)printf(
2302 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2303 tmin, avg, tmax, dev);
2304 (void)fflush(stdout);
2305 }
2306 (void)fflush(stdout);
2307 }
2308
2309 /*subject type*/
2310 static const char *niqcode[] = {
2311 "IPv6 address",
2312 "DNS label", /*or empty*/
2313 "IPv4 address",
2314 };
2315
2316 /*result code*/
2317 static const char *nircode[] = {
2318 "Success", "Refused", "Unknown",
2319 };
2320
2321
2322 /*
2323 * pr_icmph --
2324 * Print a descriptive string about an ICMP header.
2325 */
2326 static void
pr_icmph(struct icmp6_hdr * icp,u_char * end)2327 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2328 {
2329 char ntop_buf[INET6_ADDRSTRLEN];
2330 struct nd_redirect *red;
2331 struct icmp6_nodeinfo *ni;
2332 char dnsname[MAXDNAME + 1];
2333 const u_char *cp;
2334 size_t l;
2335
2336 switch (icp->icmp6_type) {
2337 case ICMP6_DST_UNREACH:
2338 switch (icp->icmp6_code) {
2339 case ICMP6_DST_UNREACH_NOROUTE:
2340 (void)printf("No Route to Destination\n");
2341 break;
2342 case ICMP6_DST_UNREACH_ADMIN:
2343 (void)printf("Destination Administratively "
2344 "Unreachable\n");
2345 break;
2346 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2347 (void)printf("Destination Unreachable Beyond Scope\n");
2348 break;
2349 case ICMP6_DST_UNREACH_ADDR:
2350 (void)printf("Destination Host Unreachable\n");
2351 break;
2352 case ICMP6_DST_UNREACH_NOPORT:
2353 (void)printf("Destination Port Unreachable\n");
2354 break;
2355 default:
2356 (void)printf("Destination Unreachable, Bad Code: %d\n",
2357 icp->icmp6_code);
2358 break;
2359 }
2360 /* Print returned IP header information */
2361 pr_retip((struct ip6_hdr *)(icp + 1), end);
2362 break;
2363 case ICMP6_PACKET_TOO_BIG:
2364 (void)printf("Packet too big mtu = %d\n",
2365 (int)ntohl(icp->icmp6_mtu));
2366 pr_retip((struct ip6_hdr *)(icp + 1), end);
2367 break;
2368 case ICMP6_TIME_EXCEEDED:
2369 switch (icp->icmp6_code) {
2370 case ICMP6_TIME_EXCEED_TRANSIT:
2371 (void)printf("Time to live exceeded\n");
2372 break;
2373 case ICMP6_TIME_EXCEED_REASSEMBLY:
2374 (void)printf("Frag reassembly time exceeded\n");
2375 break;
2376 default:
2377 (void)printf("Time exceeded, Bad Code: %d\n",
2378 icp->icmp6_code);
2379 break;
2380 }
2381 pr_retip((struct ip6_hdr *)(icp + 1), end);
2382 break;
2383 case ICMP6_PARAM_PROB:
2384 (void)printf("Parameter problem: ");
2385 switch (icp->icmp6_code) {
2386 case ICMP6_PARAMPROB_HEADER:
2387 (void)printf("Erroneous Header ");
2388 break;
2389 case ICMP6_PARAMPROB_NEXTHEADER:
2390 (void)printf("Unknown Nextheader ");
2391 break;
2392 case ICMP6_PARAMPROB_OPTION:
2393 (void)printf("Unrecognized Option ");
2394 break;
2395 default:
2396 (void)printf("Bad code(%d) ", icp->icmp6_code);
2397 break;
2398 }
2399 (void)printf("pointer = 0x%02x\n",
2400 (u_int32_t)ntohl(icp->icmp6_pptr));
2401 pr_retip((struct ip6_hdr *)(icp + 1), end);
2402 break;
2403 case ICMP6_ECHO_REQUEST:
2404 (void)printf("Echo Request");
2405 /* XXX ID + Seq + Data */
2406 break;
2407 case ICMP6_ECHO_REPLY:
2408 (void)printf("Echo Reply");
2409 /* XXX ID + Seq + Data */
2410 break;
2411 case ICMP6_MEMBERSHIP_QUERY:
2412 (void)printf("Listener Query");
2413 break;
2414 case ICMP6_MEMBERSHIP_REPORT:
2415 (void)printf("Listener Report");
2416 break;
2417 case ICMP6_MEMBERSHIP_REDUCTION:
2418 (void)printf("Listener Done");
2419 break;
2420 case ND_ROUTER_SOLICIT:
2421 (void)printf("Router Solicitation");
2422 break;
2423 case ND_ROUTER_ADVERT:
2424 (void)printf("Router Advertisement");
2425 break;
2426 case ND_NEIGHBOR_SOLICIT:
2427 (void)printf("Neighbor Solicitation");
2428 break;
2429 case ND_NEIGHBOR_ADVERT:
2430 (void)printf("Neighbor Advertisement");
2431 break;
2432 case ND_REDIRECT:
2433 red = (struct nd_redirect *)icp;
2434 (void)printf("Redirect\n");
2435 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf,
2436 sizeof(ntop_buf)))
2437 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2438 (void)printf("Destination: %s", ntop_buf);
2439 if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf,
2440 sizeof(ntop_buf)))
2441 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2442 (void)printf(" New Target: %s", ntop_buf);
2443 break;
2444 case ICMP6_NI_QUERY:
2445 (void)printf("Node Information Query");
2446 /* XXX ID + Seq + Data */
2447 ni = (struct icmp6_nodeinfo *)icp;
2448 l = end - (u_char *)(ni + 1);
2449 printf(", ");
2450 switch (ntohs(ni->ni_qtype)) {
2451 case NI_QTYPE_NOOP:
2452 (void)printf("NOOP");
2453 break;
2454 case NI_QTYPE_SUPTYPES:
2455 (void)printf("Supported qtypes");
2456 break;
2457 case NI_QTYPE_FQDN:
2458 (void)printf("DNS name");
2459 break;
2460 case NI_QTYPE_NODEADDR:
2461 (void)printf("nodeaddr");
2462 break;
2463 case NI_QTYPE_IPV4ADDR:
2464 (void)printf("IPv4 nodeaddr");
2465 break;
2466 default:
2467 (void)printf("unknown qtype");
2468 break;
2469 }
2470 if (options & F_VERBOSE) {
2471 switch (ni->ni_code) {
2472 case ICMP6_NI_SUBJ_IPV6:
2473 if (l == sizeof(struct in6_addr) &&
2474 inet_ntop(AF_INET6, ni + 1, ntop_buf,
2475 sizeof(ntop_buf)) != NULL) {
2476 (void)printf(", subject=%s(%s)",
2477 niqcode[ni->ni_code], ntop_buf);
2478 } else {
2479 #if 1
2480 /* backward compat to -W */
2481 (void)printf(", oldfqdn");
2482 #else
2483 (void)printf(", invalid");
2484 #endif
2485 }
2486 break;
2487 case ICMP6_NI_SUBJ_FQDN:
2488 if (end == (u_char *)(ni + 1)) {
2489 (void)printf(", no subject");
2490 break;
2491 }
2492 printf(", subject=%s", niqcode[ni->ni_code]);
2493 cp = (const u_char *)(ni + 1);
2494 cp = dnsdecode(cp, end, NULL, dnsname,
2495 sizeof(dnsname));
2496 if (cp != NULL)
2497 printf("(%s)", dnsname);
2498 else
2499 printf("(invalid)");
2500 break;
2501 case ICMP6_NI_SUBJ_IPV4:
2502 if (l == sizeof(struct in_addr) &&
2503 inet_ntop(AF_INET, ni + 1, ntop_buf,
2504 sizeof(ntop_buf)) != NULL) {
2505 (void)printf(", subject=%s(%s)",
2506 niqcode[ni->ni_code], ntop_buf);
2507 } else
2508 (void)printf(", invalid");
2509 break;
2510 default:
2511 (void)printf(", invalid");
2512 break;
2513 }
2514 }
2515 break;
2516 case ICMP6_NI_REPLY:
2517 (void)printf("Node Information Reply");
2518 /* XXX ID + Seq + Data */
2519 ni = (struct icmp6_nodeinfo *)icp;
2520 printf(", ");
2521 switch (ntohs(ni->ni_qtype)) {
2522 case NI_QTYPE_NOOP:
2523 (void)printf("NOOP");
2524 break;
2525 case NI_QTYPE_SUPTYPES:
2526 (void)printf("Supported qtypes");
2527 break;
2528 case NI_QTYPE_FQDN:
2529 (void)printf("DNS name");
2530 break;
2531 case NI_QTYPE_NODEADDR:
2532 (void)printf("nodeaddr");
2533 break;
2534 case NI_QTYPE_IPV4ADDR:
2535 (void)printf("IPv4 nodeaddr");
2536 break;
2537 default:
2538 (void)printf("unknown qtype");
2539 break;
2540 }
2541 if (options & F_VERBOSE) {
2542 if (ni->ni_code > nitems(nircode))
2543 printf(", invalid");
2544 else
2545 printf(", %s", nircode[ni->ni_code]);
2546 }
2547 break;
2548 default:
2549 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2550 }
2551 }
2552
2553 /*
2554 * pr_iph --
2555 * Print an IP6 header.
2556 */
2557 static void
pr_iph(struct ip6_hdr * ip6)2558 pr_iph(struct ip6_hdr *ip6)
2559 {
2560 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2561 u_int8_t tc;
2562 char ntop_buf[INET6_ADDRSTRLEN];
2563
2564 tc = *(&ip6->ip6_vfc + 1); /* XXX */
2565 tc = (tc >> 4) & 0x0f;
2566 tc |= (ip6->ip6_vfc << 4);
2567
2568 printf("Vr TC Flow Plen Nxt Hlim\n");
2569 printf(" %1x %02x %05x %04x %02x %02x\n",
2570 (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow),
2571 ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim);
2572 if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf)))
2573 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2574 printf("%s->", ntop_buf);
2575 if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf)))
2576 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2577 printf("%s\n", ntop_buf);
2578 }
2579
2580 /*
2581 * pr_addr --
2582 * Return an ascii host address as a dotted quad and optionally with
2583 * a hostname.
2584 */
2585 static const char *
pr_addr(struct sockaddr * addr,int addrlen)2586 pr_addr(struct sockaddr *addr, int addrlen)
2587 {
2588 static char buf[NI_MAXHOST];
2589 int flag = 0;
2590
2591 if ((options & F_HOSTNAME) == 0)
2592 flag |= NI_NUMERICHOST;
2593
2594 if (cap_getnameinfo(capdns, addr, addrlen, buf, sizeof(buf), NULL, 0,
2595 flag) == 0)
2596 return (buf);
2597 else
2598 return "?";
2599 }
2600
2601 /*
2602 * pr_retip --
2603 * Dump some info on a returned (via ICMPv6) IPv6 packet.
2604 */
2605 static void
pr_retip(struct ip6_hdr * ip6,u_char * end)2606 pr_retip(struct ip6_hdr *ip6, u_char *end)
2607 {
2608 u_char *cp = (u_char *)ip6, nh;
2609 int hlen;
2610
2611 if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) {
2612 printf("IP6");
2613 goto trunc;
2614 }
2615 pr_iph(ip6);
2616 hlen = sizeof(*ip6);
2617
2618 nh = ip6->ip6_nxt;
2619 cp += hlen;
2620 while (end - cp >= 8) {
2621 struct ah ah;
2622
2623 switch (nh) {
2624 case IPPROTO_HOPOPTS:
2625 printf("HBH ");
2626 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2627 nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2628 break;
2629 case IPPROTO_DSTOPTS:
2630 printf("DSTOPT ");
2631 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2632 nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2633 break;
2634 case IPPROTO_FRAGMENT:
2635 printf("FRAG ");
2636 hlen = sizeof(struct ip6_frag);
2637 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2638 break;
2639 case IPPROTO_ROUTING:
2640 printf("RTHDR ");
2641 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2642 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2643 break;
2644 #ifdef IPSEC
2645 case IPPROTO_AH:
2646 printf("AH ");
2647 memcpy(&ah, cp, sizeof(ah));
2648 hlen = (ah.ah_len+2) << 2;
2649 nh = ah.ah_nxt;
2650 break;
2651 #endif
2652 case IPPROTO_ICMPV6:
2653 printf("ICMP6: type = %d, code = %d\n",
2654 *cp, *(cp + 1));
2655 return;
2656 case IPPROTO_ESP:
2657 printf("ESP\n");
2658 return;
2659 case IPPROTO_TCP:
2660 printf("TCP: from port %u, to port %u (decimal)\n",
2661 (*cp * 256 + *(cp + 1)),
2662 (*(cp + 2) * 256 + *(cp + 3)));
2663 return;
2664 case IPPROTO_UDP:
2665 printf("UDP: from port %u, to port %u (decimal)\n",
2666 (*cp * 256 + *(cp + 1)),
2667 (*(cp + 2) * 256 + *(cp + 3)));
2668 return;
2669 default:
2670 printf("Unknown Header(%d)\n", nh);
2671 return;
2672 }
2673
2674 if ((cp += hlen) >= end)
2675 goto trunc;
2676 }
2677 if (end - cp < 8)
2678 goto trunc;
2679
2680 putchar('\n');
2681 return;
2682
2683 trunc:
2684 printf("...\n");
2685 return;
2686 }
2687
2688 static void
fill(char * bp,char * patp)2689 fill(char *bp, char *patp)
2690 {
2691 int ii, jj, kk;
2692 int pat[16];
2693 char *cp;
2694
2695 for (cp = patp; *cp; cp++)
2696 if (!isxdigit(*cp))
2697 errx(1, "patterns must be specified as hex digits");
2698 ii = sscanf(patp,
2699 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
2700 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
2701 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
2702 &pat[13], &pat[14], &pat[15]);
2703
2704 /* xxx */
2705 if (ii > 0)
2706 for (kk = 0;
2707 (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + ii;
2708 kk += ii)
2709 for (jj = 0; jj < ii; ++jj)
2710 bp[jj + kk] = pat[jj];
2711 if (!(options & F_QUIET)) {
2712 (void)printf("PATTERN: 0x");
2713 for (jj = 0; jj < ii; ++jj)
2714 (void)printf("%02x", bp[jj] & 0xFF);
2715 (void)printf("\n");
2716 }
2717 }
2718
2719 #ifdef IPSEC
2720 #ifdef IPSEC_POLICY_IPSEC
2721 static int
setpolicy(int so __unused,char * policy)2722 setpolicy(int so __unused, char *policy)
2723 {
2724 char *buf;
2725
2726 if (policy == NULL)
2727 return 0; /* ignore */
2728
2729 buf = ipsec_set_policy(policy, strlen(policy));
2730 if (buf == NULL)
2731 errx(1, "%s", ipsec_strerror());
2732 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_IPSEC_POLICY, buf,
2733 ipsec_get_policylen(buf)) < 0)
2734 warnx("Unable to set IPsec policy");
2735 free(buf);
2736
2737 return 0;
2738 }
2739 #endif
2740 #endif
2741
2742 static char *
nigroup(char * name,int nig_oldmcprefix)2743 nigroup(char *name, int nig_oldmcprefix)
2744 {
2745 char *p;
2746 char *q;
2747 MD5_CTX ctxt;
2748 u_int8_t digest[16];
2749 u_int8_t c;
2750 size_t l;
2751 char hbuf[NI_MAXHOST];
2752 struct in6_addr in6;
2753 int valid;
2754
2755 p = strchr(name, '.');
2756 if (!p)
2757 p = name + strlen(name);
2758 l = p - name;
2759 if (l > 63 || l > sizeof(hbuf) - 1)
2760 return NULL; /*label too long*/
2761 strncpy(hbuf, name, l);
2762 hbuf[(int)l] = '\0';
2763
2764 for (q = name; *q; q++) {
2765 if (isupper(*(unsigned char *)q))
2766 *q = tolower(*(unsigned char *)q);
2767 }
2768
2769 /* generate 16 bytes of pseudo-random value. */
2770 memset(&ctxt, 0, sizeof(ctxt));
2771 MD5Init(&ctxt);
2772 c = l & 0xff;
2773 MD5Update(&ctxt, &c, sizeof(c));
2774 MD5Update(&ctxt, (unsigned char *)name, l);
2775 MD5Final(digest, &ctxt);
2776
2777 if (nig_oldmcprefix) {
2778 /* draft-ietf-ipngwg-icmp-name-lookup */
2779 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2780 } else {
2781 /* RFC 4620 */
2782 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2783 }
2784 if (valid != 1)
2785 return NULL; /*XXX*/
2786
2787 if (nig_oldmcprefix) {
2788 /* draft-ietf-ipngwg-icmp-name-lookup */
2789 bcopy(digest, &in6.s6_addr[12], 4);
2790 } else {
2791 /* RFC 4620 */
2792 bcopy(digest, &in6.s6_addr[13], 3);
2793 }
2794
2795 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2796 return NULL;
2797
2798 return strdup(hbuf);
2799 }
2800
2801 static void
usage(void)2802 usage(void)
2803 {
2804 (void)fprintf(stderr,
2805 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2806 "A"
2807 #endif
2808 "usage: ping6 [-"
2809 "Dd"
2810 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2811 "E"
2812 #endif
2813 "fH"
2814 #ifdef IPV6_USE_MIN_MTU
2815 "m"
2816 #endif
2817 "nNoqrRtvwW] "
2818 "[-a addrtype] [-b bufsiz] [-c count] [-g gateway]\n"
2819 " [-h hoplimit] [-I interface] [-i wait] [-l preload]"
2820 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2821 " [-P policy]"
2822 #endif
2823 "\n"
2824 " [-p pattern] [-S sourceaddr] [-s packetsize] "
2825 "[-x waittime]\n"
2826 " [-X timeout] [hops ...] host\n");
2827 exit(1);
2828 }
2829
2830 static cap_channel_t *
capdns_setup(void)2831 capdns_setup(void)
2832 {
2833 cap_channel_t *capcas, *capdnsloc;
2834 #ifdef WITH_CASPER
2835 const char *types[2];
2836 int families[1];
2837 #endif
2838 capcas = cap_init();
2839 if (capcas == NULL)
2840 err(1, "unable to create casper process");
2841 capdnsloc = cap_service_open(capcas, "system.dns");
2842 /* Casper capability no longer needed. */
2843 cap_close(capcas);
2844 if (capdnsloc == NULL)
2845 err(1, "unable to open system.dns service");
2846 #ifdef WITH_CASPER
2847 types[0] = "NAME2ADDR";
2848 types[1] = "ADDR2NAME";
2849 if (cap_dns_type_limit(capdnsloc, types, nitems(types)) < 0)
2850 err(1, "unable to limit access to system.dns service");
2851 families[0] = AF_INET6;
2852 if (cap_dns_family_limit(capdnsloc, families, nitems(families)) < 0)
2853 err(1, "unable to limit access to system.dns service");
2854 #endif
2855 return (capdnsloc);
2856 }
2857