1 /* $KAME: ping6.c,v 1.169 2003/07/25 06:01:47 itojun Exp $ */
4 * SPDX-License-Identifier: BSD-3-Clause
6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
34 /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */
37 * Copyright (c) 1989, 1993
38 * The Regents of the University of California. All rights reserved.
40 * This code is derived from software contributed to Berkeley by
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
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.
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
70 static const char copyright[] =
71 "@(#) Copyright (c) 1989, 1993\n\
72 The Regents of the University of California. All rights reserved.\n";
76 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
80 #include <sys/cdefs.h>
81 __FBSDID("$FreeBSD$");
84 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility,
85 * measure round-trip-delays and packet loss across network paths.
89 * U. S. Army Ballistic Research Laboratory
93 * Public Domain. Distribution Unlimited.
95 * More statistics could always be gathered.
96 * This program has to run SUID to ROOT to access the ICMP socket.
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)
106 #include <sys/param.h>
107 #include <sys/capsicum.h>
109 #include <sys/socket.h>
112 #include <net/route.h>
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>
121 #include <capsicum_helpers.h>
122 #include <casper/cap_dns.h>
123 #include <libcasper.h>
134 #include <sysexits.h>
139 #include <netipsec/ah.h>
140 #include <netipsec/ipsec.h>
150 #define MAXPACKETLEN 131072
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 */
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))
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
179 #ifdef IPSEC_POLICY_IPSEC
180 #define F_POLICY 0x0400
182 #define F_AUTHHDR 0x0200
183 #define F_ENCRYPT 0x0400
184 #endif /*IPSEC_POLICY_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;
203 #define IN6LEN sizeof(struct in6_addr)
204 #define SA6LEN sizeof(struct sockaddr_in6)
205 #define DUMMY_PORT 10101
207 #define SIN6(s) ((struct sockaddr_in6 *)(s))
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...
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];
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;
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 */
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. */
252 /* for node addresses */
253 static u_short naflags;
255 /* for ancillary data(advanced API) */
256 static struct msghdr smsghdr;
257 static struct iovec smsgiov;
258 static char *scmsg = 0;
260 static volatile sig_atomic_t seenint;
262 static volatile sig_atomic_t seeninfo;
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 *,
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);
296 main(int argc, char *argv[])
298 struct timespec last, intvl;
299 struct sockaddr_in6 from, *sin6;
300 struct addrinfo hints, *res;
301 struct sigaction si_sa;
303 int almost_done, ch, hold, packlen, preload, optval, error;
304 int nig_oldmcprefix = -1;
306 char *e, *target, *ifname = NULL, *gateway = NULL;
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)
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;
326 #ifdef IPV6_USE_MIN_MTU
329 cap_rights_t rights_srecv;
330 cap_rights_t rights_ssend;
331 cap_rights_t rights_stdin;
333 /* just to be sure */
334 memset(&smsghdr, 0, sizeof(smsghdr));
335 memset(&smsgiov, 0, sizeof(smsgiov));
336 memset(&pktinfo, 0, sizeof(pktinfo));
338 intvl.tv_sec = interval / 1000;
339 intvl.tv_nsec = interval % 1000 * 1000000;
341 alarmtimeout = preload = 0;
342 datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN];
343 capdns = capdns_setup();
347 #ifdef IPSEC_POLICY_IPSEC
351 #endif /*IPSEC_POLICY_IPSEC*/
353 while ((ch = getopt(argc, argv,
354 "k:b:c:DdfHe:m:I:i:l:unNop:qaAS:s:OvyYW:t:" ADDOPTS)) != -1) {
361 options &= ~F_NOUSERDATA;
362 options |= F_NODEADDR;
363 for (cp = optarg; *cp != '\0'; cp++) {
366 naflags |= NI_NODEADDR_FLAG_ALL;
370 naflags |= NI_NODEADDR_FLAG_COMPAT;
374 naflags |= NI_NODEADDR_FLAG_LINKLOCAL;
378 naflags |= NI_NODEADDR_FLAG_SITELOCAL;
382 naflags |= NI_NODEADDR_FLAG_GLOBAL;
384 case 'A': /* experimental. not in the spec */
385 #ifdef NI_NODEADDR_FLAG_ANYCAST
386 naflags |= NI_NODEADDR_FLAG_ANYCAST;
390 "-a A is not supported on the platform");
401 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
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");
411 "-b option ignored: SO_SNDBUF/SO_RCVBUF socket options not supported");
415 npackets = strtol(optarg, &e, 10);
416 if (npackets <= 0 || *optarg == '\0' || *e != '\0')
418 "illegal number of packets -- %s", optarg);
421 options |= F_DONTFRAG;
424 options |= F_SO_DEBUG;
429 errx(1, "Must be superuser to flood ping");
432 setbuf(stdout, (char *)NULL);
438 options |= F_HOSTNAME;
440 case 'm': /* 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)
446 "illegal hoplimit -- %s", optarg);
450 options |= F_INTERFACE;
451 #ifndef USE_SIN6_SCOPE_ID
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",
463 intvl.tv_sec = (time_t)t;
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;
473 options |= F_INTERVAL;
478 errx(1, "Must be superuser to preload");
480 preload = strtol(optarg, &e, 10);
481 if (preload < 0 || *optarg == '\0' || *e != '\0')
482 errx(1, "illegal preload value -- %s", optarg);
485 #ifdef IPV6_USE_MIN_MTU
489 errx(1, "-%c is not supported on this platform", ch);
493 options &= ~F_HOSTNAME;
496 options |= F_NIGROUP;
502 case 'p': /* fill buffer with user pattern */
503 options |= F_PINGFILLED;
504 fill((char *)datap, optarg);
510 options |= F_AUDIBLE;
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;
522 error = cap_getaddrinfo(capdns, optarg, NULL, &hints, &res);
524 errx(1, "invalid source address: %s",
525 gai_strerror(error));
528 * res->ai_family must be AF_INET6 and res->ai_addrlen
529 * must be sizeof(src).
531 memcpy(&src, res->ai_addr, res->ai_addrlen);
532 srclen = res->ai_addrlen;
534 options |= F_SRCADDR;
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) {
542 "datalen value too large, maximum is %d",
547 options &= ~F_NOUSERDATA;
548 options |= F_SUPTYPES;
551 options |= F_VERBOSE;
554 options &= ~F_NOUSERDATA;
558 options &= ~F_NOUSERDATA;
559 options |= F_FQDNOLD;
562 t = strtod(optarg, &e);
563 if (*e || e == optarg || t > (double)INT_MAX)
564 err(EX_USAGE, "invalid timing interval: `%s'",
566 options |= F_WAITTIME;
570 alarmtimeout = strtoul(optarg, &e, 0);
571 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
572 errx(EX_USAGE, "invalid timeout: `%s'",
574 if (alarmtimeout > MAXALARM)
575 errx(EX_USAGE, "invalid timeout: `%s' > %d",
577 alarm((int)alarmtimeout);
580 #ifdef IPSEC_POLICY_IPSEC
583 if (!strncmp("in", optarg, 2)) {
584 if ((policy_in = strdup(optarg)) == NULL)
586 } else if (!strncmp("out", optarg, 3)) {
587 if ((policy_out = strdup(optarg)) == NULL)
590 errx(1, "invalid security policy");
594 options |= F_AUTHHDR;
597 options |= F_ENCRYPT;
599 #endif /*IPSEC_POLICY_IPSEC*/
616 #ifdef IPV6_RECVRTHDR /* 2292bis */
617 rthlen = CMSG_SPACE(inet6_rth_space(IPV6_RTHDR_TYPE_0,
620 rthlen = inet6_rthdr_space(IPV6_RTHDR_TYPE_0, argc - 1);
623 errx(1, "too many intermediate hops");
629 if (options & F_NIGROUP) {
630 target = nigroup(argv[argc - 1], nig_oldmcprefix);
631 if (target == NULL) {
636 target = argv[argc - 1];
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;
645 error = cap_getaddrinfo(capdns, target, NULL, &hints, &res);
647 errx(1, "%s", gai_strerror(error));
648 if (res->ai_canonname)
649 hostname = strdup(res->ai_canonname);
654 errx(1, "cap_getaddrinfo failed");
656 (void)memcpy(&dst, res->ai_addr, res->ai_addrlen);
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");
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;
678 if (bind(ssend, (struct sockaddr *)&src, srclen) != 0)
681 /* set the gateway (next hop) if specified */
683 memset(&hints, 0, sizeof(hints));
684 hints.ai_family = AF_INET6;
685 hints.ai_socktype = SOCK_RAW;
686 hints.ai_protocol = IPPROTO_ICMPV6;
688 error = cap_getaddrinfo(capdns, gateway, NULL, &hints, &res);
690 errx(1, "cap_getaddrinfo for the gateway %s: %s",
691 gateway, gai_strerror(error));
693 if (res->ai_next && (options & F_VERBOSE))
694 warnx("gateway resolves to multiple addresses");
696 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_NEXTHOP,
697 res->ai_addr, res->ai_addrlen)) {
698 err(1, "setsockopt(IPV6_NEXTHOP)");
705 * let the kerel pass extension headers of incoming packets,
706 * for privileged socket options
708 if ((options & F_VERBOSE) != 0) {
711 #ifdef IPV6_RECVHOPOPTS
712 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton,
714 err(1, "setsockopt(IPV6_RECVHOPOPTS)");
715 #else /* old adv. API */
716 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_HOPOPTS, &opton,
718 err(1, "setsockopt(IPV6_HOPOPTS)");
720 #ifdef IPV6_RECVDSTOPTS
721 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton,
723 err(1, "setsockopt(IPV6_RECVDSTOPTS)");
724 #else /* old adv. API */
725 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_DSTOPTS, &opton,
727 err(1, "setsockopt(IPV6_DSTOPTS)");
729 #ifdef IPV6_RECVRTHDRDSTOPTS
730 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDRDSTOPTS, &opton,
732 err(1, "setsockopt(IPV6_RECVRTHDRDSTOPTS)");
736 /* revoke root privilege */
737 if (seteuid(getuid()) != 0)
738 err(1, "seteuid() failed");
739 if (setuid(getuid()) != 0)
740 err(1, "setuid() failed");
742 if ((options & F_FLOOD) && (options & F_INTERVAL))
743 errx(1, "-f and -i incompatible options");
745 if ((options & F_NOUSERDATA) == 0) {
746 if (datalen >= sizeof(struct tv32)) {
747 /* we can time transfer */
751 /* in F_VERBOSE case, we may get non-echoreply packets*/
752 if (options & F_VERBOSE)
753 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
755 packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA;
757 /* suppress timing for node information query */
760 packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA;
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)
769 ident = getpid() & 0xFFFF;
770 arc4random_buf(nonce, sizeof(nonce));
772 if (options & F_DONTFRAG)
773 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_DONTFRAG,
774 &optval, sizeof(optval)) == -1)
775 err(1, "IPV6_DONTFRAG");
778 if (options & F_SO_DEBUG) {
779 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold,
781 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold,
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
791 optval = mflag > 1 ? 0 : 1;
793 if (setsockopt(ssend, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
794 &optval, sizeof(optval)) == -1)
795 err(1, "setsockopt(IPV6_USE_MIN_MTU)");
797 #ifdef IPV6_RECVPATHMTU
800 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVPATHMTU,
801 &optval, sizeof(optval)) == -1)
802 err(1, "setsockopt(IPV6_RECVPATHMTU)");
804 #endif /* IPV6_RECVPATHMTU */
805 #endif /* IPV6_USE_MIN_MTU */
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());
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)");
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)");
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)");
843 #endif /*IPSEC_POLICY_IPSEC*/
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);
855 ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt);
857 ICMP6_FILTER_SETPASSALL(&filt);
859 if (setsockopt(srecv, IPPROTO_ICMPV6, ICMP6_FILTER, &filt,
861 err(1, "setsockopt(ICMP6_FILTER)");
863 #endif /*ICMP6_FILTER*/
865 /* let the kerel pass extension headers of incoming packets */
866 if ((options & F_VERBOSE) != 0) {
869 #ifdef IPV6_RECVRTHDR
870 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton,
872 err(1, "setsockopt(IPV6_RECVRTHDR)");
873 #else /* old adv. API */
874 if (setsockopt(srecv, IPPROTO_IPV6, IPV6_RTHDR, &opton,
876 err(1, "setsockopt(IPV6_RTHDR)");
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");
888 /* Specify the outgoing interface and/or the source address */
890 ip6optlen += CMSG_SPACE(sizeof(struct in6_pktinfo));
893 ip6optlen += CMSG_SPACE(sizeof(int));
895 /* set IP6 packet options */
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);
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);
911 /* set the outgoing interface */
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);
918 if ((dst.sin6_scope_id = if_nametoindex(ifname)) == 0)
919 errx(1, "%s: invalid interface name", ifname);
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));
928 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
931 if (argc > 1) { /* some intermediate addrs are specified */
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);
943 errx(1, "can't initialize rthdr");
945 for (hops = 0; hops < argc - 1; hops++) {
946 memset(&hints, 0, sizeof(hints));
947 hints.ai_family = AF_INET6;
949 if ((error = cap_getaddrinfo(capdns, argv[hops], NULL, &hints,
951 errx(1, "%s", gai_strerror(error));
952 if (res->ai_addr->sa_family != AF_INET6)
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");
961 scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp);
964 /* From now on we will use only reverse DNS lookups. */
966 if (capdns != NULL) {
967 const char *types[1];
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");
974 if (!(options & F_SRCADDR)) {
976 * get the source address. XXX since we revoked the root
977 * privilege, we cannot use a raw socket for this.
980 socklen_t len = sizeof(src);
982 if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
983 err(1, "UDP socket");
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;
991 setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO,
992 (void *)&pktinfo, sizeof(pktinfo)))
993 err(1, "UDP setsockopt(IPV6_PKTINFO)");
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)");
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)");
1006 setsockopt(dummy, IPPROTO_IPV6, IPV6_RTHDR,
1007 (void *)rthdr, (rthdr->ip6r_len + 1) << 3))
1008 err(1, "UDP setsockopt(IPV6_RTHDR)");
1010 if (connect(dummy, (struct sockaddr *)&src, len) < 0)
1011 err(1, "UDP connect");
1013 if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0)
1014 err(1, "getsockname");
1019 /* Save pktinfo in the ancillary data. */
1021 memcpy(cmsg_pktinfo, &pktinfo, sizeof(pktinfo));
1023 if (connect(ssend, (struct sockaddr *)&dst, sizeof(dst)) != 0)
1024 err(1, "connect() ssend");
1026 caph_cache_catpages();
1027 if (caph_enter_casper() < 0)
1028 err(1, "caph_enter_casper");
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");
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");
1045 #if defined(SO_SNDBUF) && defined(SO_RCVBUF)
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)");
1057 if (datalen > 8 * 1024) /*XXX*/
1058 warnx("you need -b to increase socket buffer size");
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.
1066 setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
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? */
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? */
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");
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)));
1108 if (npackets != 0 && preload > npackets)
1113 clock_gettime(CLOCK_MONOTONIC, &last);
1115 sigemptyset(&si_sa.sa_mask);
1117 si_sa.sa_handler = onsignal;
1118 if (sigaction(SIGINT, &si_sa, 0) == -1)
1119 err(EX_OSERR, "sigaction SIGINT");
1122 if (sigaction(SIGINFO, &si_sa, 0) == -1)
1123 err(EX_OSERR, "sigaction SIGINFO");
1126 if (alarmtimeout > 0) {
1127 if (sigaction(SIGALRM, &si_sa, 0) == -1)
1128 err(EX_OSERR, "sigaction SIGALRM");
1130 if (options & F_FLOOD) {
1132 intvl.tv_nsec = 10000000;
1136 while (seenint == 0) {
1137 struct timespec now, timeout;
1139 struct iovec iov[2];
1143 /* signal handling */
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);
1161 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL);
1163 continue; /* EINTR */
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;
1172 memset(cm, 0, CONTROLLEN);
1173 m.msg_control = (void *)cm;
1174 m.msg_controllen = CONTROLLEN;
1176 cc = recvmsg(srecv, &m, 0);
1178 if (errno != EINTR) {
1183 } else if (cc == 0) {
1187 * receive control messages only. Process the
1188 * exceptions (currently the only possibility is
1189 * a path MTU notification.)
1191 if ((mtu = get_pathmtu(&m)) > 0) {
1192 if ((options & F_VERBOSE) != 0) {
1193 printf("new path MTU (%d) is "
1200 * an ICMPv6 message (probably an echoreply)
1203 pr_pack(packet, cc, &m);
1205 if (((options & F_ONCE) != 0 && nreceived > 0) ||
1206 (npackets > 0 && nreceived >= npackets))
1209 if (n == 0 || (options & F_FLOOD)) {
1210 if (npackets == 0 || ntransmitted < npackets)
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.
1224 intvl.tv_sec = 2 * tmax / 1000;
1225 if (intvl.tv_sec == 0)
1228 intvl.tv_sec = waittime / 1000;
1230 waittime % 1000 * 1000000;
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);
1241 sigemptyset(&si_sa.sa_mask);
1243 si_sa.sa_handler = SIG_IGN;
1244 sigaction(SIGINT, &si_sa, 0);
1245 sigaction(SIGALRM, &si_sa, 0);
1251 exit(nreceived == 0 ? 2 : 0);
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.
1284 if (options & F_FQDN)
1285 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1286 else if (options & F_FQDNOLD)
1288 else if (options & F_NODEADDR)
1289 l = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1290 else if (options & F_SUPTYPES)
1293 l = ICMP6ECHOLEN + datalen;
1301 struct icmp6_hdr *icp;
1302 struct iovec iov[2];
1304 struct icmp6_nodeinfo *nip;
1307 if (npackets && ntransmitted >= npackets)
1308 return(-1); /* no more transmission */
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);
1317 if (options & F_FQDN) {
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);
1325 memcpy(nip->icmp6_ni_nonce, nonce,
1326 sizeof(nip->icmp6_ni_nonce));
1328 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1330 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1331 sizeof(dst.sin6_addr));
1332 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1334 } else if (options & F_FQDNOLD) {
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);
1342 memcpy(nip->icmp6_ni_nonce, nonce,
1343 sizeof(nip->icmp6_ni_nonce));
1345 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1349 } else if (options & F_NODEADDR) {
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;
1357 memcpy(nip->icmp6_ni_nonce, nonce,
1358 sizeof(nip->icmp6_ni_nonce));
1360 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1362 memcpy(&outpack[ICMP6_NIQLEN], &dst.sin6_addr,
1363 sizeof(dst.sin6_addr));
1364 cc = ICMP6_NIQLEN + sizeof(dst.sin6_addr);
1366 } else if (options & F_SUPTYPES) {
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;
1375 memcpy(nip->icmp6_ni_nonce, nonce,
1376 sizeof(nip->icmp6_ni_nonce));
1378 memcpy(nip->icmp6_ni_nonce, &s, sizeof(s));
1383 icp->icmp6_type = ICMP6_ECHO_REQUEST;
1384 icp->icmp6_code = 0;
1385 icp->icmp6_id = htons(ident);
1386 icp->icmp6_seq = htons(seq);
1390 (void)clock_gettime(CLOCK_MONOTONIC, &tv);
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.
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));
1401 cc = ICMP6ECHOLEN + datalen;
1405 if (pingerlen() != cc)
1406 errx(1, "internal error; length mismatch");
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;
1415 i = sendmsg(ssend, &smsghdr, 0);
1417 if (i < 0 || i != cc) {
1420 (void)printf("ping6: wrote %s %d chars, ret=%d\n",
1423 if (!(options & F_QUIET) && options & F_FLOOD)
1424 (void)write(STDOUT_FILENO, &DOT, 1);
1430 myechoreply(const struct icmp6_hdr *icp)
1432 if (ntohs(icp->icmp6_id) == ident)
1439 mynireply(const struct icmp6_nodeinfo *nip)
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)
1450 * Decode a name from a DNS message.
1452 * Format of the message is described in RFC 1035 subsection 4.1.4.
1455 * sp - Pointer to a DNS pointer octet or to the first octet of a label
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'.
1463 * Pointer to an octet immediately following the ending zero octet
1464 * of the decoded label, or NULL if an error occured.
1467 dnsdecode(const u_char *sp, const u_char *ep, const u_char *base, char *buf,
1472 char cresult[MAXDNAME + 1];
1483 if (i == 0 || cp != sp) {
1484 if (strlcat((char *)buf, ".", bufsiz) >= bufsiz)
1485 return NULL; /*result overrun*/
1491 if ((i & 0xc0) == 0xc0 && cp - base > (i & 0x3f)) {
1492 /* DNS compression */
1496 comp = base + (i & 0x3f);
1497 if (dnsdecode(comp, cp, base, cresult,
1498 sizeof(cresult)) == NULL)
1500 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1501 return NULL; /*result overrun*/
1503 } else if ((i & 0x3f) == i) {
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)
1511 if (strlcat(buf, cresult, bufsiz) >= bufsiz)
1512 return NULL; /*result overrun*/
1516 return NULL; /*invalid label*/
1519 return NULL; /*not terminated*/
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!).
1532 pr_pack(u_char *buf, int cc, struct msghdr *mhdr)
1534 #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c)
1535 struct icmp6_hdr *icp;
1536 struct icmp6_nodeinfo *ni;
1539 struct sockaddr *from;
1541 const u_char *cp = NULL;
1542 u_char *dp, *end = buf + cc;
1543 struct in6_pktinfo *pktinfo = NULL;
1544 struct timespec tv, tp;
1546 double triptime = 0;
1551 char dnsname[MAXDNAME + 1];
1553 (void)clock_gettime(CLOCK_MONOTONIC, &tv);
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");
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));
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;
1577 if ((hoplim = get_hoplim(mhdr)) == -1) {
1578 warnx("failed to get receiving hop limit");
1581 if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) {
1582 warnx("failed to get receiving packet information");
1586 if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) {
1587 seq = ntohs(icp->icmp6_seq);
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;
1597 tsumsq += triptime * triptime;
1598 if (triptime < tmin)
1600 if (triptime > tmax)
1604 if (TST(seq % mx_dup_ck)) {
1609 SET(seq % mx_dup_ck);
1613 if (options & F_QUIET)
1616 if (options & F_WAITTIME && triptime > waittime) {
1621 if (options & F_FLOOD)
1622 (void)write(STDOUT_FILENO, &BSPACE, 1);
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;
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,
1642 (void)printf(" time=%.3f ms", triptime);
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) {
1650 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp);
1655 } else if (icp->icmp6_type == ICMP6_NI_REPLY && mynireply(ni)) {
1656 memcpy(&seq, ni->icmp6_ni_nonce, sizeof(seq));
1659 if (TST(seq % mx_dup_ck)) {
1664 SET(seq % mx_dup_ck);
1668 if (options & F_QUIET)
1671 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1673 switch (ntohs(ni->ni_code)) {
1674 case ICMP6_NI_SUCCESS:
1676 case ICMP6_NI_REFUSED:
1677 printf("refused, type 0x%x", ntohs(ni->ni_type));
1679 case ICMP6_NI_UNKNOWN:
1680 printf("unknown, type 0x%x", ntohs(ni->ni_type));
1683 printf("unknown code 0x%x, type 0x%x",
1684 ntohs(ni->ni_code), ntohs(ni->ni_type));
1688 switch (ntohs(ni->ni_qtype)) {
1690 printf("NodeInfo NOOP");
1692 case NI_QTYPE_SUPTYPES:
1693 pr_suptypes(ni, end - (u_char *)ni);
1695 case NI_QTYPE_NODEADDR:
1696 pr_nodeaddr(ni, end - (u_char *)ni);
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)
1707 cp++; /* skip length */
1709 safeputc(*cp & 0xff);
1715 cp = dnsdecode((const u_char *)cp, end,
1716 (const u_char *)(ni + 1), dnsname,
1723 * name-lookup special handling for
1726 if (cp + 1 <= end && !*cp &&
1727 strlen(dnsname) > 0) {
1728 dnsname[strlen(dnsname) - 1] = '\0';
1731 printf("%s%s", i > 0 ? "," : "",
1735 if (options & F_VERBOSE) {
1740 (void)printf(" ("); /*)*/
1742 switch (ni->ni_code) {
1743 case ICMP6_NI_REFUSED:
1744 (void)printf("refused");
1747 case ICMP6_NI_UNKNOWN:
1748 (void)printf("unknown qtype");
1753 if ((end - (u_char *)ni) < ICMP6_NIRLEN) {
1754 /* case of refusion, unknown */
1759 memcpy(&t, &buf[off+ICMP6ECHOLEN+8], sizeof(t));
1760 ttl = (int32_t)ntohl(t);
1763 if (!(ni->ni_flags & NI_FQDN_FLAG_VALIDTTL)) {
1764 (void)printf("TTL=%d:meaningless",
1768 (void)printf("TTL=%d:invalid",
1771 (void)printf("TTL=%d", ttl);
1781 cp = (u_char *)ni + ICMP6_NIRLEN;
1790 if (buf[off + ICMP6_NIRLEN] !=
1791 cc - off - ICMP6_NIRLEN - 1 && oldfqdn) {
1794 (void)printf("invalid namelen:%d/%lu",
1795 buf[off + ICMP6_NIRLEN],
1796 (u_long)cc - off - ICMP6_NIRLEN - 1);
1806 /* We've got something other than an ECHOREPLY */
1807 if (!(options & F_VERBOSE))
1809 (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen));
1813 if (!(options & F_FLOOD)) {
1814 (void)putchar('\n');
1815 if (options & F_VERBOSE)
1817 (void)fflush(stdout);
1823 pr_exthdrs(struct msghdr *mhdr)
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)
1836 bufsize = CONTROLLEN - ((caddr_t)CMSG_DATA(cm) - (caddr_t)bufp);
1839 switch (cm->cmsg_type) {
1841 printf(" HbH Options: ");
1842 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1845 #ifdef IPV6_RTHDRDSTOPTS
1846 case IPV6_RTHDRDSTOPTS:
1848 printf(" Dst Options: ");
1849 pr_ip6opt(CMSG_DATA(cm), (size_t)bufsize);
1852 printf(" Routing: ");
1853 pr_rthdr(CMSG_DATA(cm), (size_t)bufsize);
1860 pr_ip6opt(void *extbuf, size_t bufsize)
1862 struct ip6_hbh *ext;
1865 socklen_t extlen, len;
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);
1877 * Bounds checking on the ancillary data buffer:
1878 * subtract the size of a cmsg structure from the buffer size.
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));
1889 currentlen = inet6_opt_next(extbuf, extlen, currentlen,
1890 &type, &len, &databuf);
1891 if (currentlen == -1)
1895 * Note that inet6_opt_next automatically skips any padding
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));
1905 case IP6OPT_ROUTER_ALERT:
1907 offset = inet6_opt_get_val(databuf, offset,
1908 &value2, sizeof(value2));
1909 printf(" Router Alert Opt: Type %u\n",
1913 printf(" Received Opt %u len %lu\n",
1914 type, (unsigned long)len);
1922 pr_rthdr(void *extbuf, size_t bufsize)
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;
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);
1936 printf("segments unknown, ");
1937 printf("%d left\n", rh->ip6r_segleft);
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
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);
1960 for (i = 0; i < segments; i++) {
1961 in6 = inet6_rth_getaddr(extbuf, i);
1963 printf(" [%d]<NULL>\n", i);
1965 if (!inet_ntop(AF_INET6, in6, ntopbuf,
1967 strlcpy(ntopbuf, "?", sizeof(ntopbuf));
1968 printf(" [%d]%s\n", i, ntopbuf);
1977 pr_bitrange(u_int32_t v, int soff, int ii)
1984 /* shift till we have 0x01 */
1985 if ((v & 0x01) == 0) {
1987 printf("-%u", soff + off - 1);
1998 case 0x04: case 0x0c:
2009 /* we have 0x01 with us */
2010 for (i = 0; i < 32 - off; i++) {
2011 if ((v & (0x01 << i)) == 0)
2015 printf(" %u", soff + off);
2023 pr_suptypes(struct icmp6_nodeinfo *ni, size_t nilen)
2024 /* ni->qtype must be SUPTYPES */
2028 const u_char *cp, *end;
2031 u_int16_t words; /*32bit count*/
2034 #define MAXQTYPES (1 << 16)
2038 cp = (u_char *)(ni + 1);
2039 end = ((u_char *)ni) + nilen;
2043 printf("NodeInfo Supported Qtypes");
2044 if (options & F_VERBOSE) {
2045 if (ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS)
2046 printf(", compressed bitmap");
2048 printf(", raw bitmap");
2052 clen = (size_t)(end - cp);
2053 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) == 0) {
2054 if (clen == 0 || clen > MAXQTYPES / 8 ||
2060 if (clen < sizeof(cbit) || clen % sizeof(v))
2062 memcpy(&cbit, cp, sizeof(cbit));
2063 if (sizeof(cbit) + ntohs(cbit.words) * sizeof(v) >
2067 clen = ntohs(cbit.words) * sizeof(v);
2068 if (cur + clen * 8 + (u_long)ntohs(cbit.skip) * 32 >
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);
2078 /* flush the remaining bits */
2079 b = pr_bitrange(0, (int)(cur + off * 8), b);
2083 if ((ni->ni_flags & NI_SUPTYPE_FLAG_COMPRESS) != 0)
2084 cur += ntohs(cbit.skip) * 32;
2089 pr_nodeaddr(struct icmp6_nodeinfo *ni, int nilen)
2090 /* ni->qtype must be NODEADDR */
2092 u_char *cp = (u_char *)(ni + 1);
2093 char ntop_buf[INET6_ADDRSTRLEN];
2096 nilen -= sizeof(struct icmp6_nodeinfo);
2098 if (options & F_VERBOSE) {
2099 switch (ni->ni_code) {
2100 case ICMP6_NI_REFUSED:
2101 (void)printf("refused");
2103 case ICMP6_NI_UNKNOWN:
2104 (void)printf("unknown qtype");
2107 if (ni->ni_flags & NI_NODEADDR_FLAG_TRUNCATE)
2108 (void)printf(" truncated");
2112 printf(" no address\n");
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.
2120 if (nilen % (sizeof(u_int32_t) + sizeof(struct in6_addr)) == 0)
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);
2134 if (inet_ntop(AF_INET6, cp, ntop_buf, sizeof(ntop_buf)) ==
2136 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2137 printf(" %s", ntop_buf);
2139 if (ttl == 0xffffffff) {
2141 * XXX: can this convention be applied to all
2142 * type of TTL (i.e. non-ND TTL)?
2144 printf("(TTL=infty)");
2147 printf("(TTL=%u)", ttl);
2151 nilen -= sizeof(struct in6_addr);
2152 cp += sizeof(struct in6_addr);
2157 get_hoplim(struct msghdr *mhdr)
2161 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2162 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2163 if (cm->cmsg_len == 0)
2166 if (cm->cmsg_level == IPPROTO_IPV6 &&
2167 cm->cmsg_type == IPV6_HOPLIMIT &&
2168 cm->cmsg_len == CMSG_LEN(sizeof(int))) {
2171 memcpy(&r, CMSG_DATA(cm), sizeof(r));
2179 static struct in6_pktinfo *
2180 get_rcvpktinfo(struct msghdr *mhdr)
2182 static struct in6_pktinfo pi;
2185 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2186 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2187 if (cm->cmsg_len == 0)
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));
2202 get_pathmtu(struct msghdr *mhdr)
2204 #ifdef IPV6_RECVPATHMTU
2206 struct ip6_mtuinfo mtuctl;
2208 for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm;
2209 cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) {
2210 if (cm->cmsg_len == 0)
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));
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.
2226 if (!IN6_ARE_ADDR_EQUAL(&mtuctl.ip6m_addr.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. "
2235 pr_addr((struct sockaddr *)&mtuctl.ip6m_addr,
2236 sizeof(mtuctl.ip6m_addr)));
2242 * Ignore an invalid MTU. XXX: can we just believe
2245 if (mtuctl.ip6m_mtu < IPV6_MMTU)
2248 /* notification for our destination. return the MTU. */
2249 return((int)mtuctl.ip6m_mtu);
2262 onint(int notused __unused)
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.
2268 if ((options & F_HOSTNAME) && seenint != 0)
2269 _exit(nreceived ? 0 : 2);
2274 * Print out statistics.
2280 (void)printf("\n--- %s ping6 statistics ---\n", hostname);
2281 (void)printf("%ld packets transmitted, ", ntransmitted);
2282 (void)printf("%ld packets received, ", nreceived);
2284 (void)printf("+%ld duplicates, ", nrepeats);
2286 if (nreceived > ntransmitted)
2287 (void)printf("-- somebody's duplicating packets!");
2289 (void)printf("%.1f%% packet loss",
2290 ((((double)ntransmitted - nreceived) * 100.0) /
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);
2302 "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n",
2303 tmin, avg, tmax, dev);
2304 (void)fflush(stdout);
2306 (void)fflush(stdout);
2310 static const char *niqcode[] = {
2312 "DNS label", /*or empty*/
2317 static const char *nircode[] = {
2318 "Success", "Refused", "Unknown",
2324 * Print a descriptive string about an ICMP header.
2327 pr_icmph(struct icmp6_hdr *icp, u_char *end)
2329 char ntop_buf[INET6_ADDRSTRLEN];
2330 struct nd_redirect *red;
2331 struct icmp6_nodeinfo *ni;
2332 char dnsname[MAXDNAME + 1];
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");
2342 case ICMP6_DST_UNREACH_ADMIN:
2343 (void)printf("Destination Administratively "
2346 case ICMP6_DST_UNREACH_BEYONDSCOPE:
2347 (void)printf("Destination Unreachable Beyond Scope\n");
2349 case ICMP6_DST_UNREACH_ADDR:
2350 (void)printf("Destination Host Unreachable\n");
2352 case ICMP6_DST_UNREACH_NOPORT:
2353 (void)printf("Destination Port Unreachable\n");
2356 (void)printf("Destination Unreachable, Bad Code: %d\n",
2360 /* Print returned IP header information */
2361 pr_retip((struct ip6_hdr *)(icp + 1), end);
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);
2368 case ICMP6_TIME_EXCEEDED:
2369 switch (icp->icmp6_code) {
2370 case ICMP6_TIME_EXCEED_TRANSIT:
2371 (void)printf("Time to live exceeded\n");
2373 case ICMP6_TIME_EXCEED_REASSEMBLY:
2374 (void)printf("Frag reassembly time exceeded\n");
2377 (void)printf("Time exceeded, Bad Code: %d\n",
2381 pr_retip((struct ip6_hdr *)(icp + 1), end);
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 ");
2389 case ICMP6_PARAMPROB_NEXTHEADER:
2390 (void)printf("Unknown Nextheader ");
2392 case ICMP6_PARAMPROB_OPTION:
2393 (void)printf("Unrecognized Option ");
2396 (void)printf("Bad code(%d) ", icp->icmp6_code);
2399 (void)printf("pointer = 0x%02x\n",
2400 (u_int32_t)ntohl(icp->icmp6_pptr));
2401 pr_retip((struct ip6_hdr *)(icp + 1), end);
2403 case ICMP6_ECHO_REQUEST:
2404 (void)printf("Echo Request");
2405 /* XXX ID + Seq + Data */
2407 case ICMP6_ECHO_REPLY:
2408 (void)printf("Echo Reply");
2409 /* XXX ID + Seq + Data */
2411 case ICMP6_MEMBERSHIP_QUERY:
2412 (void)printf("Listener Query");
2414 case ICMP6_MEMBERSHIP_REPORT:
2415 (void)printf("Listener Report");
2417 case ICMP6_MEMBERSHIP_REDUCTION:
2418 (void)printf("Listener Done");
2420 case ND_ROUTER_SOLICIT:
2421 (void)printf("Router Solicitation");
2423 case ND_ROUTER_ADVERT:
2424 (void)printf("Router Advertisement");
2426 case ND_NEIGHBOR_SOLICIT:
2427 (void)printf("Neighbor Solicitation");
2429 case ND_NEIGHBOR_ADVERT:
2430 (void)printf("Neighbor Advertisement");
2433 red = (struct nd_redirect *)icp;
2434 (void)printf("Redirect\n");
2435 if (!inet_ntop(AF_INET6, &red->nd_rd_dst, 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,
2441 strlcpy(ntop_buf, "?", sizeof(ntop_buf));
2442 (void)printf(" New Target: %s", ntop_buf);
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);
2450 switch (ntohs(ni->ni_qtype)) {
2452 (void)printf("NOOP");
2454 case NI_QTYPE_SUPTYPES:
2455 (void)printf("Supported qtypes");
2458 (void)printf("DNS name");
2460 case NI_QTYPE_NODEADDR:
2461 (void)printf("nodeaddr");
2463 case NI_QTYPE_IPV4ADDR:
2464 (void)printf("IPv4 nodeaddr");
2467 (void)printf("unknown qtype");
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);
2480 /* backward compat to -W */
2481 (void)printf(", oldfqdn");
2483 (void)printf(", invalid");
2487 case ICMP6_NI_SUBJ_FQDN:
2488 if (end == (u_char *)(ni + 1)) {
2489 (void)printf(", no subject");
2492 printf(", subject=%s", niqcode[ni->ni_code]);
2493 cp = (const u_char *)(ni + 1);
2494 cp = dnsdecode(cp, end, NULL, dnsname,
2497 printf("(%s)", dnsname);
2499 printf("(invalid)");
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);
2508 (void)printf(", invalid");
2511 (void)printf(", invalid");
2516 case ICMP6_NI_REPLY:
2517 (void)printf("Node Information Reply");
2518 /* XXX ID + Seq + Data */
2519 ni = (struct icmp6_nodeinfo *)icp;
2521 switch (ntohs(ni->ni_qtype)) {
2523 (void)printf("NOOP");
2525 case NI_QTYPE_SUPTYPES:
2526 (void)printf("Supported qtypes");
2529 (void)printf("DNS name");
2531 case NI_QTYPE_NODEADDR:
2532 (void)printf("nodeaddr");
2534 case NI_QTYPE_IPV4ADDR:
2535 (void)printf("IPv4 nodeaddr");
2538 (void)printf("unknown qtype");
2541 if (options & F_VERBOSE) {
2542 if (ni->ni_code > nitems(nircode))
2543 printf(", invalid");
2545 printf(", %s", nircode[ni->ni_code]);
2549 (void)printf("Bad ICMP type: %d", icp->icmp6_type);
2555 * Print an IP6 header.
2558 pr_iph(struct ip6_hdr *ip6)
2560 u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK;
2562 char ntop_buf[INET6_ADDRSTRLEN];
2564 tc = *(&ip6->ip6_vfc + 1); /* XXX */
2565 tc = (tc >> 4) & 0x0f;
2566 tc |= (ip6->ip6_vfc << 4);
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);
2582 * Return an ascii host address as a dotted quad and optionally with
2586 pr_addr(struct sockaddr *addr, int addrlen)
2588 static char buf[NI_MAXHOST];
2591 if ((options & F_HOSTNAME) == 0)
2592 flag |= NI_NUMERICHOST;
2594 if (cap_getnameinfo(capdns, addr, addrlen, buf, sizeof(buf), NULL, 0,
2603 * Dump some info on a returned (via ICMPv6) IPv6 packet.
2606 pr_retip(struct ip6_hdr *ip6, u_char *end)
2608 u_char *cp = (u_char *)ip6, nh;
2611 if ((size_t)(end - (u_char *)ip6) < sizeof(*ip6)) {
2616 hlen = sizeof(*ip6);
2620 while (end - cp >= 8) {
2624 case IPPROTO_HOPOPTS:
2626 hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3;
2627 nh = ((struct ip6_hbh *)cp)->ip6h_nxt;
2629 case IPPROTO_DSTOPTS:
2631 hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3;
2632 nh = ((struct ip6_dest *)cp)->ip6d_nxt;
2634 case IPPROTO_FRAGMENT:
2636 hlen = sizeof(struct ip6_frag);
2637 nh = ((struct ip6_frag *)cp)->ip6f_nxt;
2639 case IPPROTO_ROUTING:
2641 hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3;
2642 nh = ((struct ip6_rthdr *)cp)->ip6r_nxt;
2647 memcpy(&ah, cp, sizeof(ah));
2648 hlen = (ah.ah_len+2) << 2;
2652 case IPPROTO_ICMPV6:
2653 printf("ICMP6: type = %d, code = %d\n",
2660 printf("TCP: from port %u, to port %u (decimal)\n",
2661 (*cp * 256 + *(cp + 1)),
2662 (*(cp + 2) * 256 + *(cp + 3)));
2665 printf("UDP: from port %u, to port %u (decimal)\n",
2666 (*cp * 256 + *(cp + 1)),
2667 (*(cp + 2) * 256 + *(cp + 3)));
2670 printf("Unknown Header(%d)\n", nh);
2674 if ((cp += hlen) >= end)
2689 fill(char *bp, char *patp)
2695 for (cp = patp; *cp; cp++)
2697 errx(1, "patterns must be specified as hex digits");
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]);
2707 (size_t)kk <= MAXDATALEN - 8 + sizeof(struct tv32) + 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);
2720 #ifdef IPSEC_POLICY_IPSEC
2722 setpolicy(int so __unused, char *policy)
2727 return 0; /* ignore */
2729 buf = ipsec_set_policy(policy, strlen(policy));
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");
2743 nigroup(char *name, int nig_oldmcprefix)
2748 u_int8_t digest[16];
2751 char hbuf[NI_MAXHOST];
2752 struct in6_addr in6;
2755 p = strchr(name, '.');
2757 p = name + strlen(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';
2764 for (q = name; *q; q++) {
2765 if (isupper(*(unsigned char *)q))
2766 *q = tolower(*(unsigned char *)q);
2769 /* generate 16 bytes of pseudo-random value. */
2770 memset(&ctxt, 0, sizeof(ctxt));
2773 MD5Update(&ctxt, &c, sizeof(c));
2774 MD5Update(&ctxt, (unsigned char *)name, l);
2775 MD5Final(digest, &ctxt);
2777 if (nig_oldmcprefix) {
2778 /* draft-ietf-ipngwg-icmp-name-lookup */
2779 valid = inet_pton(AF_INET6, "ff02::2:0000:0000", &in6);
2782 valid = inet_pton(AF_INET6, "ff02::2:ff00:0000", &in6);
2785 return NULL; /*XXX*/
2787 if (nig_oldmcprefix) {
2788 /* draft-ietf-ipngwg-icmp-name-lookup */
2789 bcopy(digest, &in6.s6_addr[12], 4);
2792 bcopy(digest, &in6.s6_addr[13], 3);
2795 if (inet_ntop(AF_INET6, &in6, hbuf, sizeof(hbuf)) == NULL)
2798 return strdup(hbuf);
2804 (void)fprintf(stderr,
2805 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2810 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC)
2814 #ifdef IPV6_USE_MIN_MTU
2818 "[-b bufsiz] [-c count] [-e gateway]\n"
2819 " [-I interface] [-i wait] [-k addrtype] [-l preload] "
2822 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
2825 " [-S sourceaddr] [-s packetsize]\n"
2826 " [-t timeout] [-W waittime] [hops ...] host\n");
2830 static cap_channel_t *
2833 cap_channel_t *capcas, *capdnsloc;
2835 const char *types[2];
2838 capcas = cap_init();
2840 err(1, "unable to create casper process");
2841 capdnsloc = cap_service_open(capcas, "system.dns");
2842 /* Casper capability no longer needed. */
2844 if (capdnsloc == NULL)
2845 err(1, "unable to open system.dns service");
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");