/* $OpenBSD: ping6.c,v 1.128 2015/10/17 15:43:31 florian Exp $ */ /* $KAME: ping6.c,v 1.163 2002/10/25 02:19:06 itojun Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* BSDI ping.c,v 2.3 1996/01/21 17:56:50 jch Exp */ /* * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Mike Muuss. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, * measure round-trip-delays and packet loss across network paths. * * Author - * Mike Muuss * U. S. Army Ballistic Research Laboratory * December, 1983 * * Status - * Public Domain. Distribution Unlimited. * Bugs - * More statistics could always be gathered. * This program has to run SUID to ROOT to access the ICMP socket. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct tv64 { u_int64_t tv64_sec; u_int64_t tv64_nsec; }; struct payload { struct tv64 tv64; u_int8_t mac[SIPHASH_DIGEST_LENGTH]; }; #define MAXPACKETLEN 131072 #define IP6LEN 40 #define ICMP6ECHOLEN 8 /* icmp echo header len excluding time */ #define ICMP6ECHOTMLEN sizeof(struct payload) #define EXTRA 256 /* for AH and various other headers. weird. */ #define DEFDATALEN ICMP6ECHOTMLEN #define MAXDATALEN MAXPACKETLEN - IP6LEN - ICMP6ECHOLEN #define MAXWAIT_DEFAULT 10 /* secs to wait for response */ #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ #define SET(bit) (A(bit) |= B(bit)) #define CLR(bit) (A(bit) &= (~B(bit))) #define TST(bit) (A(bit) & B(bit)) #define F_FLOOD 0x0001 #define F_INTERVAL 0x0002 #define F_PINGFILLED 0x0008 #define F_QUIET 0x0010 #define F_SO_DEBUG 0x0040 #define F_VERBOSE 0x0100 #define F_SRCADDR 0x4000 #define F_HOSTNAME 0x10000 #define F_AUD_RECV 0x200000 #define F_AUD_MISS 0x400000 u_int options; #define DUMMY_PORT 10101 /* * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum * number of received sequence numbers we can keep track of. Change 128 * to 8192 for complete accuracy... */ #define MAX_DUP_CHK (8 * 8192) int mx_dup_ck = MAX_DUP_CHK; char rcvd_tbl[MAX_DUP_CHK / 8]; struct sockaddr_in6 dst; /* who to ping6 */ struct sockaddr_in6 src; /* src addr of this packet */ int datalen = DEFDATALEN; int s; /* socket file descriptor */ u_char outpack[MAXPACKETLEN]; char BSPACE = '\b'; /* characters written for flood */ char DOT = '.'; char *hostname; int ident; /* process id to identify our packets */ u_int8_t nonce[8]; /* nonce field for node information */ int hoplimit = -1; /* hoplimit */ /* counters */ long npackets; /* max packets to transmit */ long nreceived; /* # of packets we got back */ long nrepeats; /* number of duplicates */ long ntransmitted; /* sequence # for outbound packets = #sent */ unsigned long nmissedmax = 1; /* max value of ntransmitted - nreceived - 1 */ struct timeval interval = {1, 0}; /* interval between packets */ /* timing */ int timing; /* flag to do timing */ unsigned int maxwait = MAXWAIT_DEFAULT; /* max seconds to wait for response */ double tmin = 999999999.0; /* minimum round trip time */ double tmax = 0.0; /* maximum round trip time */ double tsum = 0.0; /* sum of all times, for doing average */ double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ struct tv64 tv64_offset; /* random offset for time values */ SIPHASH_KEY mac_key; /* for ancillary data(advanced API) */ struct msghdr smsghdr; struct iovec smsgiov; char *scmsg; volatile sig_atomic_t seenalrm; volatile sig_atomic_t seenint; volatile sig_atomic_t seeninfo; int main(int, char *[]); void fill(char *, char *); int get_hoplim(struct msghdr *); int get_pathmtu(struct msghdr *); struct in6_pktinfo *get_rcvpktinfo(struct msghdr *); void onsignal(int); void retransmit(void); void onint(int); size_t pingerlen(void); int pinger(void); const char *pr_addr(struct sockaddr *, socklen_t); void pr_icmph(struct icmp6_hdr *, u_char *); void pr_iph(struct ip6_hdr *); int myechoreply(const struct icmp6_hdr *); void pr_pack(u_char *, int, struct msghdr *); void pr_exthdrs(struct msghdr *); void pr_ip6opt(void *); void pr_rthdr(void *); int pr_bitrange(u_int32_t, int, int); void pr_retip(struct ip6_hdr *, u_char *); void summary(int); void usage(void); int main(int argc, char *argv[]) { struct addrinfo *res0; struct itimerval itimer; struct sockaddr_in6 from; struct addrinfo hints; int ch, i, maxsize, packlen, preload, optval, error; socklen_t maxsizelen; u_char *datap, *packet; char *e, *target, *gateway = NULL; const char *errstr; int ip6optlen = 0; struct cmsghdr *scmsgp = NULL; struct in6_pktinfo *pktinfo = NULL; double intval; int mflag = 0; uid_t uid; u_int rtableid = 0; if ((s = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) err(1, "socket"); /* revoke root privilege */ uid = getuid(); if (setresuid(uid, uid, uid) == -1) err(1, "setresuid"); preload = 0; datap = &outpack[ICMP6ECHOLEN + ICMP6ECHOTMLEN]; while ((ch = getopt(argc, argv, "c:dEefg:Hh:I:i:l:mNnp:qS:s:V:vw:")) != -1) { switch (ch) { case 'c': npackets = strtonum(optarg, 0, INT_MAX, &errstr); if (errstr) errx(1, "number of packets to transmit is %s: %s", errstr, optarg); break; case 'd': options |= F_SO_DEBUG; break; case 'E': options |= F_AUD_MISS; break; case 'e': options |= F_AUD_RECV; break; case 'f': if (getuid()) { errno = EPERM; errx(1, "Must be superuser to flood ping"); } options |= F_FLOOD; setbuf(stdout, (char *)NULL); break; case 'g': gateway = optarg; break; case 'H': options |= F_HOSTNAME; break; case 'h': /* hoplimit */ hoplimit = strtonum(optarg, 0, IPV6_MAXHLIM, &errstr); if (errstr) errx(1, "hoplimit is %s: %s", errstr, optarg); break; case 'I': memset(&hints, 0, sizeof(struct addrinfo)); hints.ai_flags = AI_NUMERICHOST; /* allow hostname? */ hints.ai_family = AF_INET6; hints.ai_socktype = SOCK_RAW; hints.ai_protocol = IPPROTO_ICMPV6; error = getaddrinfo(optarg, NULL, &hints, &res0); if (error) errx(1, "invalid source address: %s", gai_strerror(error)); if (res0->ai_family != AF_INET6 || res0->ai_addrlen != sizeof(src)) errx(1, "invalid source address"); memcpy(&src, res0->ai_addr, sizeof(src)); freeaddrinfo(res0); options |= F_SRCADDR; break; case 'i': /* wait between sending packets */ intval = strtod(optarg, &e); if (*optarg == '\0' || *e != '\0') errx(1, "illegal timing interval %s", optarg); if (intval < 1 && getuid()) { errx(1, "%s: only root may use interval < 1s", strerror(EPERM)); } interval.tv_sec = (time_t)intval; interval.tv_usec = (long)((intval - interval.tv_sec) * 1000000); if (interval.tv_sec < 0) errx(1, "illegal timing interval %s", optarg); /* less than 1/Hz does not make sense */ if (interval.tv_sec == 0 && interval.tv_usec < 10000) { warnx("too small interval, raised to 0.01"); interval.tv_usec = 10000; } options |= F_INTERVAL; break; case 'l': if (getuid()) { errno = EPERM; errx(1, "Must be superuser to preload"); } preload = strtonum(optarg, 0, INT_MAX, &errstr); if (errstr) errx(1, "preload value is %s: %s", errstr, optarg); break; case 'm': mflag++; break; case 'n': options &= ~F_HOSTNAME; break; case 'p': /* fill buffer with user pattern */ options |= F_PINGFILLED; fill((char *)datap, optarg); break; case 'q': options |= F_QUIET; break; case 's': /* size of packet to send */ datalen = strtonum(optarg, 1, MAXDATALEN, &errstr); if (errstr) errx(1, "datalen value is %s: %s", errstr, optarg); break; case 'V': rtableid = strtonum(optarg, 0, RT_TABLEID_MAX, &errstr); if (errstr) errx(1, "rtable value is %s: %s", errstr, optarg); if (setsockopt(s, SOL_SOCKET, SO_RTABLE, &rtableid, sizeof(rtableid)) == -1) err(1, "setsockopt SO_RTABLE"); break; case 'v': options |= F_VERBOSE; break; case 'w': maxwait = strtonum(optarg, 1, INT_MAX, &errstr); if (errstr) errx(1, "maxwait value is %s: %s", errstr, optarg); break; default: usage(); /*NOTREACHED*/ } } argc -= optind; argv += optind; if (argc < 1) { usage(); /*NOTREACHED*/ } if (argc != 1) usage(); target = argv[argc - 1]; /* getaddrinfo */ memset(&hints, 0, sizeof(struct addrinfo)); hints.ai_flags = AI_CANONNAME; hints.ai_family = AF_INET6; hints.ai_socktype = SOCK_RAW; hints.ai_protocol = IPPROTO_ICMPV6; error = getaddrinfo(target, NULL, &hints, &res0); if (error) errx(1, "host %s: %s", target, gai_strerror(error)); if (res0->ai_canonname) { if ((hostname = strdup(res0->ai_canonname)) == NULL) errx(1, "out of memory"); } else hostname = target; if (res0->ai_next && (options & F_VERBOSE)) warnx("host resolves to multiple addresses"); if (res0->ai_family != AF_INET6 || res0->ai_addrlen != sizeof(dst)) errx(1, "getaddrinfo failed"); memcpy(&dst, res0->ai_addr, sizeof(dst)); freeaddrinfo(res0); /* set the source address if specified. */ if ((options & F_SRCADDR) && bind(s, (struct sockaddr *)&src, sizeof(src)) != 0) { err(1, "bind"); } /* set the gateway (next hop) if specified */ if (gateway) { memset(&hints, 0, sizeof(hints)); hints.ai_family = AF_INET6; hints.ai_socktype = SOCK_RAW; hints.ai_protocol = IPPROTO_ICMPV6; error = getaddrinfo(gateway, NULL, &hints, &res0); if (error) errx(1, "gateway %s: %s", gateway, gai_strerror(error)); if (res0->ai_next && (options & F_VERBOSE)) warnx("gateway resolves to multiple addresses"); if (setsockopt(s, IPPROTO_IPV6, IPV6_NEXTHOP, res0->ai_addr, res0->ai_addrlen)) err(1, "setsockopt(IPV6_NEXTHOP)"); freeaddrinfo(res0); } /* * let the kernel pass extension headers of incoming packets, * for privileged socket options */ if ((options & F_VERBOSE) != 0) { int opton = 1; if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPOPTS, &opton, (socklen_t)sizeof(opton))) err(1, "setsockopt(IPV6_RECVHOPOPTS)"); if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVDSTOPTS, &opton, (socklen_t)sizeof(opton))) err(1, "setsockopt(IPV6_RECVDSTOPTS)"); } if ((options & F_FLOOD) && (options & F_INTERVAL)) errx(1, "-f and -i incompatible options"); if ((options & F_FLOOD) && (options & (F_AUD_RECV | F_AUD_MISS))) warnx("No audible output for flood pings"); if (datalen >= sizeof(struct payload)) { /* we can time transfer */ timing = 1; } else timing = 0; /* in F_VERBOSE case, we may get non-echoreply packets*/ if (options & F_VERBOSE) packlen = 2048 + IP6LEN + ICMP6ECHOLEN + EXTRA; /* XXX 2048? */ else packlen = datalen + IP6LEN + ICMP6ECHOLEN + EXTRA; if (!(packet = malloc(packlen))) err(1, "Unable to allocate packet"); /* * When trying to send large packets, you must increase the * size of both the send and receive buffers... */ maxsizelen = sizeof maxsize; if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, &maxsize, &maxsizelen) < 0) err(1, "getsockopt"); if (maxsize < packlen && setsockopt(s, SOL_SOCKET, SO_SNDBUF, &packlen, sizeof(maxsize)) < 0) err(1, "setsockopt"); if (getsockopt(s, SOL_SOCKET, SO_RCVBUF, &maxsize, &maxsizelen) < 0) err(1, "getsockopt"); if (maxsize < packlen && setsockopt(s, SOL_SOCKET, SO_RCVBUF, &packlen, sizeof(maxsize)) < 0) err(1, "setsockopt"); if (!(options & F_PINGFILLED)) for (i = ICMP6ECHOLEN; i < packlen; ++i) *datap++ = i; ident = getpid() & 0xFFFF; arc4random_buf(nonce, sizeof(nonce)); optval = 1; if (options & F_SO_DEBUG) (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, &optval, (socklen_t)sizeof(optval)); optval = IPV6_DEFHLIM; if (IN6_IS_ADDR_MULTICAST(&dst.sin6_addr)) if (setsockopt(s, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &optval, (socklen_t)sizeof(optval)) == -1) err(1, "IPV6_MULTICAST_HOPS"); if (mflag != 1) { optval = mflag > 1 ? 0 : 1; if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU, &optval, (socklen_t)sizeof(optval)) == -1) err(1, "setsockopt(IPV6_USE_MIN_MTU)"); } else { optval = 1; if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPATHMTU, &optval, sizeof(optval)) == -1) err(1, "setsockopt(IPV6_RECVPATHMTU)"); } { struct icmp6_filter filt; if (!(options & F_VERBOSE)) { ICMP6_FILTER_SETBLOCKALL(&filt); ICMP6_FILTER_SETPASS(ICMP6_ECHO_REPLY, &filt); } else { ICMP6_FILTER_SETPASSALL(&filt); } if (setsockopt(s, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, (socklen_t)sizeof(filt)) < 0) err(1, "setsockopt(ICMP6_FILTER)"); } /* let the kernel pass extension headers of incoming packets */ if ((options & F_VERBOSE) != 0) { int opton = 1; if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVRTHDR, &opton, sizeof(opton))) err(1, "setsockopt(IPV6_RECVRTHDR)"); } if (hoplimit != -1) ip6optlen += CMSG_SPACE(sizeof(int)); /* set IP6 packet options */ if (ip6optlen) { if ((scmsg = malloc(ip6optlen)) == 0) errx(1, "can't allocate enough memory"); smsghdr.msg_control = (caddr_t)scmsg; smsghdr.msg_controllen = ip6optlen; scmsgp = (struct cmsghdr *)scmsg; } if (hoplimit != -1) { scmsgp->cmsg_len = CMSG_LEN(sizeof(int)); scmsgp->cmsg_level = IPPROTO_IPV6; scmsgp->cmsg_type = IPV6_HOPLIMIT; *(int *)(CMSG_DATA(scmsgp)) = hoplimit; scmsgp = CMSG_NXTHDR(&smsghdr, scmsgp); } if (!(options & F_SRCADDR)) { /* * get the source address. XXX since we revoked the root * privilege, we cannot use a raw socket for this. */ int dummy; socklen_t len = sizeof(src); if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) err(1, "UDP socket"); src.sin6_family = AF_INET6; src.sin6_addr = dst.sin6_addr; src.sin6_port = ntohs(DUMMY_PORT); src.sin6_scope_id = dst.sin6_scope_id; if (pktinfo && setsockopt(dummy, IPPROTO_IPV6, IPV6_PKTINFO, (void *)pktinfo, sizeof(*pktinfo))) err(1, "UDP setsockopt(IPV6_PKTINFO)"); if (hoplimit != -1 && setsockopt(dummy, IPPROTO_IPV6, IPV6_UNICAST_HOPS, (void *)&hoplimit, sizeof(hoplimit))) err(1, "UDP setsockopt(IPV6_UNICAST_HOPS)"); if (hoplimit != -1 && setsockopt(dummy, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, (void *)&hoplimit, sizeof(hoplimit))) err(1, "UDP setsockopt(IPV6_MULTICAST_HOPS)"); if (rtableid > 0 && setsockopt(dummy, SOL_SOCKET, SO_RTABLE, &rtableid, sizeof(rtableid)) < 0) err(1, "setsockopt(SO_RTABLE)"); if (connect(dummy, (struct sockaddr *)&src, len) < 0) err(1, "UDP connect"); if (getsockname(dummy, (struct sockaddr *)&src, &len) < 0) err(1, "getsockname"); close(dummy); } optval = 1; if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, (socklen_t)sizeof(optval)) < 0) warn("setsockopt(IPV6_RECVPKTINFO)"); /* XXX err? */ if (setsockopt(s, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &optval, (socklen_t)sizeof(optval)) < 0) warn("setsockopt(IPV6_RECVHOPLIMIT)"); /* XXX err? */ if (options & F_HOSTNAME) { if (pledge("stdio inet dns", NULL) == -1) err(1, "pledge"); } else { if (pledge("stdio inet", NULL) == -1) err(1, "pledge"); } arc4random_buf(&tv64_offset, sizeof(tv64_offset)); arc4random_buf(&mac_key, sizeof(mac_key)); printf("PING6(%lu=40+8+%lu bytes) ", (unsigned long)(40 + ICMP6ECHOLEN + datalen), (unsigned long)(ICMP6ECHOLEN + datalen - 8)); printf("%s --> ", pr_addr((struct sockaddr *)&src, sizeof(src))); printf("%s\n", pr_addr((struct sockaddr *)&dst, sizeof(dst))); while (preload--) /* Fire off them quickies. */ (void)pinger(); (void)signal(SIGINT, onsignal); (void)signal(SIGINFO, onsignal); if ((options & F_FLOOD) == 0) { (void)signal(SIGALRM, onsignal); itimer.it_interval = interval; itimer.it_value = interval; (void)setitimer(ITIMER_REAL, &itimer, NULL); if (ntransmitted == 0) retransmit(); } seenalrm = seenint = 0; seeninfo = 0; for (;;) { struct msghdr m; union { struct cmsghdr hdr; u_char buf[CMSG_SPACE(1024)]; } cmsgbuf; struct iovec iov[1]; struct pollfd pfd; ssize_t cc; int timeout; /* signal handling */ if (seenalrm) { retransmit(); seenalrm = 0; continue; } if (seenint) { onint(SIGINT); seenint = 0; continue; } if (seeninfo) { summary(0); seeninfo = 0; continue; } if (options & F_FLOOD) { (void)pinger(); timeout = 10; } else timeout = INFTIM; pfd.fd = s; pfd.events = POLLIN; if (poll(&pfd, 1, timeout) <= 0) continue; m.msg_name = &from; m.msg_namelen = sizeof(from); memset(&iov, 0, sizeof(iov)); iov[0].iov_base = (caddr_t)packet; iov[0].iov_len = packlen; m.msg_iov = iov; m.msg_iovlen = 1; m.msg_control = (caddr_t)&cmsgbuf.buf; m.msg_controllen = sizeof(cmsgbuf.buf); cc = recvmsg(s, &m, 0); if (cc < 0) { if (errno != EINTR) { warn("recvmsg"); sleep(1); } continue; } else if (cc == 0) { int mtu; /* * receive control messages only. Process the * exceptions (currently the only possibility is * a path MTU notification.) */ if ((mtu = get_pathmtu(&m)) > 0) { if ((options & F_VERBOSE) != 0) { printf("new path MTU (%d) is " "notified\n", mtu); } } continue; } else { /* * an ICMPv6 message (probably an echoreply) arrived. */ pr_pack(packet, cc, &m); } if (npackets && nreceived >= npackets) break; if (ntransmitted - nreceived - 1 > nmissedmax) { nmissedmax = ntransmitted - nreceived - 1; if (!(options & F_FLOOD) && (options & F_AUD_MISS)) (void)fputc('\a', stderr); } } summary(0); exit(nreceived == 0); } void onsignal(int sig) { switch (sig) { case SIGALRM: seenalrm++; break; case SIGINT: seenint++; break; case SIGINFO: seeninfo++; break; } } /* * retransmit -- * This routine transmits another ping6. */ void retransmit(void) { struct itimerval itimer; if (pinger() == 0) return; /* * If we're not transmitting any more packets, change the timer * to wait two round-trip times if we've received any packets or * maxwait seconds if we haven't. */ if (nreceived) { itimer.it_value.tv_sec = 2 * tmax / 1000; if (itimer.it_value.tv_sec == 0) itimer.it_value.tv_sec = 1; } else itimer.it_value.tv_sec = maxwait; itimer.it_interval.tv_sec = 0; itimer.it_interval.tv_usec = 0; itimer.it_value.tv_usec = 0; (void)signal(SIGALRM, onint); (void)setitimer(ITIMER_REAL, &itimer, NULL); } /* * pinger -- * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet * will be added on by the kernel. The ID field is our UNIX process ID, * and the sequence number is an ascending integer. The first 8 bytes * of the data portion are used to hold a UNIX "timeval" struct in VAX * byte-order, to compute the round-trip time. */ int pinger(void) { struct icmp6_hdr *icp; int i, cc; int seq; if (npackets && ntransmitted >= npackets) return(-1); /* no more transmission */ icp = (struct icmp6_hdr *)outpack; memset(icp, 0, sizeof(*icp)); icp->icmp6_cksum = 0; seq = ntransmitted++; CLR(seq % mx_dup_ck); icp->icmp6_type = ICMP6_ECHO_REQUEST; icp->icmp6_code = 0; icp->icmp6_id = htons(ident); icp->icmp6_seq = ntohs(seq); if (timing) { SIPHASH_CTX ctx; struct timespec ts; struct payload payload; struct tv64 *tv64 = &payload.tv64; if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1) err(1, "clock_gettime(CLOCK_MONOTONIC)"); tv64->tv64_sec = htobe64((u_int64_t)ts.tv_sec + tv64_offset.tv64_sec); tv64->tv64_nsec = htobe64((u_int64_t)ts.tv_nsec + tv64_offset.tv64_nsec); SipHash24_Init(&ctx, &mac_key); SipHash24_Update(&ctx, tv64, sizeof(*tv64)); SipHash24_Update(&ctx, &ident, sizeof(ident)); SipHash24_Update(&ctx, &icp->icmp6_seq, sizeof(icp->icmp6_seq)); SipHash24_Final(&payload.mac, &ctx); memcpy(&outpack[ICMP6ECHOLEN], &payload, sizeof(payload)); } cc = ICMP6ECHOLEN + datalen; smsghdr.msg_name = &dst; smsghdr.msg_namelen = sizeof(dst); smsgiov.iov_base = (caddr_t)outpack; smsgiov.iov_len = cc; smsghdr.msg_iov = &smsgiov; smsghdr.msg_iovlen = 1; i = sendmsg(s, &smsghdr, 0); if (i < 0 || i != cc) { if (i < 0) warn("sendmsg"); (void)printf("ping6: wrote %s %d chars, ret=%d\n", hostname, cc, i); } if (!(options & F_QUIET) && options & F_FLOOD) (void)write(STDOUT_FILENO, &DOT, 1); return(0); } int myechoreply(const struct icmp6_hdr *icp) { if (ntohs(icp->icmp6_id) == ident) return 1; else return 0; } #define MINIMUM(a,b) (((a)<(b))?(a):(b)) /* * pr_pack -- * Print out the packet, if it came from us. This logic is necessary * because ALL readers of the ICMP socket get a copy of ALL ICMP packets * which arrive ('tis only fair). This permits multiple copies of this * program to be run without having intermingled output (or statistics!). */ void pr_pack(u_char *buf, int cc, struct msghdr *mhdr) { #define safeputc(c) printf((isprint((c)) ? "%c" : "\\%03o"), c) struct icmp6_hdr *icp; int i; int hoplim; struct sockaddr *from; socklen_t fromlen; u_char *cp = NULL, *dp, *end = buf + cc; struct in6_pktinfo *pktinfo = NULL; struct timespec ts, tp; struct payload payload; struct tv64 *tv64; double triptime = 0; int dupflag; u_int16_t seq; if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1) err(1, "clock_gettime(CLOCK_MONOTONIC)"); if (!mhdr || !mhdr->msg_name || mhdr->msg_namelen != sizeof(struct sockaddr_in6) || ((struct sockaddr *)mhdr->msg_name)->sa_family != AF_INET6) { if (options & F_VERBOSE) warnx("invalid peername"); return; } from = (struct sockaddr *)mhdr->msg_name; fromlen = mhdr->msg_namelen; if (cc < sizeof(struct icmp6_hdr)) { if (options & F_VERBOSE) warnx("packet too short (%d bytes) from %s", cc, pr_addr(from, fromlen)); return; } icp = (struct icmp6_hdr *)buf; if ((hoplim = get_hoplim(mhdr)) == -1) { warnx("failed to get receiving hop limit"); return; } if ((pktinfo = get_rcvpktinfo(mhdr)) == NULL) { warnx("failed to get receiving packet information"); return; } if (icp->icmp6_type == ICMP6_ECHO_REPLY && myechoreply(icp)) { seq = ntohs(icp->icmp6_seq); ++nreceived; if (timing) { SIPHASH_CTX ctx; u_int8_t mac[SIPHASH_DIGEST_LENGTH]; if (cc - sizeof(*cp) < sizeof(payload)) { (void)printf("signature missing!\n"); return; } memcpy(&payload, icp + 1, sizeof(payload)); tv64 = &payload.tv64; SipHash24_Init(&ctx, &mac_key); SipHash24_Update(&ctx, tv64, sizeof(*tv64)); SipHash24_Update(&ctx, &ident, sizeof(ident)); SipHash24_Update(&ctx, &icp->icmp6_seq, sizeof(icp->icmp6_seq)); SipHash24_Final(mac, &ctx); if (timingsafe_memcmp(mac, &payload.mac, sizeof(mac)) != 0) { (void)printf("signature mismatch!\n"); return; } tp.tv_sec = betoh64(tv64->tv64_sec) - tv64_offset.tv64_sec; tp.tv_nsec = betoh64(tv64->tv64_nsec) - tv64_offset.tv64_nsec; timespecsub(&ts, &tp, &ts); triptime = ((double)ts.tv_sec) * 1000.0 + ((double)ts.tv_nsec) / 1000000.0; tsum += triptime; tsumsq += triptime * triptime; if (triptime < tmin) tmin = triptime; if (triptime > tmax) tmax = triptime; } if (TST(seq % mx_dup_ck)) { ++nrepeats; --nreceived; dupflag = 1; } else { SET(seq % mx_dup_ck); dupflag = 0; } if (options & F_QUIET) return; if (options & F_FLOOD) (void)write(STDOUT_FILENO, &BSPACE, 1); else { (void)printf("%d bytes from %s, icmp_seq=%u", cc, pr_addr(from, fromlen), seq); (void)printf(" hlim=%d", hoplim); if ((options & F_VERBOSE) != 0) { struct sockaddr_in6 dstsa; memset(&dstsa, 0, sizeof(dstsa)); dstsa.sin6_family = AF_INET6; dstsa.sin6_len = sizeof(dstsa); dstsa.sin6_scope_id = pktinfo->ipi6_ifindex; dstsa.sin6_addr = pktinfo->ipi6_addr; (void)printf(" dst=%s", pr_addr((struct sockaddr *)&dstsa, sizeof(dstsa))); } if (timing) (void)printf(" time=%.3f ms", triptime); if (dupflag) (void)printf("(DUP!)"); if (options & F_AUD_RECV) (void)fputc('\a', stderr); /* check the data */ cp = buf + ICMP6ECHOLEN + ICMP6ECHOTMLEN; dp = outpack + ICMP6ECHOLEN + ICMP6ECHOTMLEN; if (cc != ICMP6ECHOLEN + datalen) { int delta = cc - (datalen + ICMP6ECHOLEN); (void)printf(" (%d bytes %s)", abs(delta), delta > 0 ? "extra" : "short"); end = buf + MINIMUM(cc, ICMP6ECHOLEN + datalen); } for (i = 8; cp < end; ++i, ++cp, ++dp) { if (*cp != *dp) { (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", i, *dp, *cp); break; } } } } else { /* We've got something other than an ECHOREPLY */ if (!(options & F_VERBOSE)) return; (void)printf("%d bytes from %s: ", cc, pr_addr(from, fromlen)); pr_icmph(icp, end); } if (!(options & F_FLOOD)) { (void)putchar('\n'); if (options & F_VERBOSE) pr_exthdrs(mhdr); (void)fflush(stdout); } #undef safeputc } void pr_exthdrs(struct msghdr *mhdr) { struct cmsghdr *cm; for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { if (cm->cmsg_level != IPPROTO_IPV6) continue; switch (cm->cmsg_type) { case IPV6_HOPOPTS: printf(" HbH Options: "); pr_ip6opt(CMSG_DATA(cm)); break; case IPV6_DSTOPTS: case IPV6_RTHDRDSTOPTS: printf(" Dst Options: "); pr_ip6opt(CMSG_DATA(cm)); break; case IPV6_RTHDR: printf(" Routing: "); pr_rthdr(CMSG_DATA(cm)); break; } } } void pr_ip6opt(void *extbuf) { struct ip6_hbh *ext; int currentlen; u_int8_t type; size_t extlen; socklen_t len; void *databuf; size_t offset; u_int16_t value2; u_int32_t value4; ext = (struct ip6_hbh *)extbuf; extlen = (ext->ip6h_len + 1) * 8; printf("nxt %u, len %u (%lu bytes)\n", ext->ip6h_nxt, (unsigned int)ext->ip6h_len, (unsigned long)extlen); currentlen = 0; while (1) { currentlen = inet6_opt_next(extbuf, extlen, currentlen, &type, &len, &databuf); if (currentlen == -1) break; switch (type) { /* * Note that inet6_opt_next automatically skips any padding * options. */ case IP6OPT_JUMBO: offset = 0; offset = inet6_opt_get_val(databuf, offset, &value4, sizeof(value4)); printf(" Jumbo Payload Opt: Length %u\n", (u_int32_t)ntohl(value4)); break; case IP6OPT_ROUTER_ALERT: offset = 0; offset = inet6_opt_get_val(databuf, offset, &value2, sizeof(value2)); printf(" Router Alert Opt: Type %u\n", ntohs(value2)); break; default: printf(" Received Opt %u len %lu\n", type, (unsigned long)len); break; } } return; } void pr_rthdr(void *extbuf) { struct in6_addr *in6; char ntopbuf[INET6_ADDRSTRLEN]; struct ip6_rthdr *rh = (struct ip6_rthdr *)extbuf; int i, segments; /* print fixed part of the header */ printf("nxt %u, len %u (%d bytes), type %u, ", rh->ip6r_nxt, rh->ip6r_len, (rh->ip6r_len + 1) << 3, rh->ip6r_type); if ((segments = inet6_rth_segments(extbuf)) >= 0) printf("%d segments, ", segments); else printf("segments unknown, "); printf("%d left\n", rh->ip6r_segleft); for (i = 0; i < segments; i++) { in6 = inet6_rth_getaddr(extbuf, i); if (in6 == NULL) printf(" [%d]\n", i); else { if (!inet_ntop(AF_INET6, in6, ntopbuf, sizeof(ntopbuf))) strncpy(ntopbuf, "?", sizeof(ntopbuf)); printf(" [%d]%s\n", i, ntopbuf); } } return; } int pr_bitrange(u_int32_t v, int soff, int ii) { int off; int i; off = 0; while (off < 32) { /* shift till we have 0x01 */ if ((v & 0x01) == 0) { if (ii > 1) printf("-%u", soff + off - 1); ii = 0; switch (v & 0x0f) { case 0x00: v >>= 4; off += 4; continue; case 0x08: v >>= 3; off += 3; continue; case 0x04: case 0x0c: v >>= 2; off += 2; continue; default: v >>= 1; off += 1; continue; } } /* we have 0x01 with us */ for (i = 0; i < 32 - off; i++) { if ((v & (0x01 << i)) == 0) break; } if (!ii) printf(" %u", soff + off); ii += i; v >>= i; off += i; } return ii; } int get_hoplim(struct msghdr *mhdr) { struct cmsghdr *cm; for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { if (cm->cmsg_len == 0) return(-1); if (cm->cmsg_level == IPPROTO_IPV6 && cm->cmsg_type == IPV6_HOPLIMIT && cm->cmsg_len == CMSG_LEN(sizeof(int))) return(*(int *)CMSG_DATA(cm)); } return(-1); } struct in6_pktinfo * get_rcvpktinfo(struct msghdr *mhdr) { struct cmsghdr *cm; for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { if (cm->cmsg_len == 0) return(NULL); if (cm->cmsg_level == IPPROTO_IPV6 && cm->cmsg_type == IPV6_PKTINFO && cm->cmsg_len == CMSG_LEN(sizeof(struct in6_pktinfo))) return((struct in6_pktinfo *)CMSG_DATA(cm)); } return(NULL); } int get_pathmtu(struct msghdr *mhdr) { struct cmsghdr *cm; struct ip6_mtuinfo *mtuctl = NULL; for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { if (cm->cmsg_len == 0) return(0); if (cm->cmsg_level == IPPROTO_IPV6 && cm->cmsg_type == IPV6_PATHMTU && cm->cmsg_len == CMSG_LEN(sizeof(struct ip6_mtuinfo))) { mtuctl = (struct ip6_mtuinfo *)CMSG_DATA(cm); /* * If the notified destination is different from * the one we are pinging, just ignore the info. * We check the scope ID only when both notified value * and our own value have non-0 values, because we may * have used the default scope zone ID for sending, * in which case the scope ID value is 0. */ if (!IN6_ARE_ADDR_EQUAL(&mtuctl->ip6m_addr.sin6_addr, &dst.sin6_addr) || (mtuctl->ip6m_addr.sin6_scope_id && dst.sin6_scope_id && mtuctl->ip6m_addr.sin6_scope_id != dst.sin6_scope_id)) { if ((options & F_VERBOSE) != 0) { printf("path MTU for %s is notified. " "(ignored)\n", pr_addr((struct sockaddr *)&mtuctl->ip6m_addr, sizeof(mtuctl->ip6m_addr))); } return(0); } /* * Ignore an invalid MTU. XXX: can we just believe * the kernel check? */ if (mtuctl->ip6m_mtu < IPV6_MMTU) return(0); /* notification for our destination. return the MTU. */ return((int)mtuctl->ip6m_mtu); } } return(0); } /* * onint -- * SIGINT handler. */ void onint(int signo) { summary(signo); if (signo) _exit(nreceived ? 0 : 1); else exit(nreceived ? 0 : 1); } /* * summary -- * Print out statistics. */ void summary(int signo) { char buf[8192], buft[8192]; buf[0] = '\0'; snprintf(buft, sizeof(buft), "\n--- %s ping6 statistics ---\n", hostname); strlcat(buf, buft, sizeof(buf)); snprintf(buft, sizeof(buft), "%ld packets transmitted, ", ntransmitted); strlcat(buf, buft, sizeof(buf)); snprintf(buft, sizeof(buft), "%ld packets received, ", nreceived); strlcat(buf, buft, sizeof(buf)); if (nrepeats) { snprintf(buft, sizeof(buft), "+%ld duplicates, ", nrepeats); strlcat(buf, buft, sizeof(buf)); } if (ntransmitted) { if (nreceived > ntransmitted) snprintf(buft, sizeof(buft), "-- somebody's duplicating packets!"); else snprintf(buft, sizeof(buft), "%.1lf%% packet loss", ((((double)ntransmitted - nreceived) * 100) / ntransmitted)); strlcat(buf, buft, sizeof(buf)); } strlcat(buf, "\n", sizeof(buf)); if (nreceived && timing) { /* Only display average to microseconds */ double num = nreceived + nrepeats; double avg = tsum / num; double dev = sqrt(tsumsq / num - avg * avg); snprintf(buft, sizeof(buft), "round-trip min/avg/max/std-dev = %.3f/%.3f/%.3f/%.3f ms\n", tmin, avg, tmax, dev); strlcat(buf, buft, sizeof(buf)); } write(STDOUT_FILENO, buf, strlen(buf)); if (signo == 0) (void)fflush(stdout); } /* * pr_icmph -- * Print a descriptive string about an ICMP header. */ void pr_icmph(struct icmp6_hdr *icp, u_char *end) { char ntop_buf[INET6_ADDRSTRLEN]; struct nd_redirect *red; switch (icp->icmp6_type) { case ICMP6_DST_UNREACH: switch (icp->icmp6_code) { case ICMP6_DST_UNREACH_NOROUTE: (void)printf("No Route to Destination\n"); break; case ICMP6_DST_UNREACH_ADMIN: (void)printf("Destination Administratively " "Unreachable\n"); break; case ICMP6_DST_UNREACH_BEYONDSCOPE: (void)printf("Destination Unreachable Beyond Scope\n"); break; case ICMP6_DST_UNREACH_ADDR: (void)printf("Destination Host Unreachable\n"); break; case ICMP6_DST_UNREACH_NOPORT: (void)printf("Destination Port Unreachable\n"); break; default: (void)printf("Destination Unreachable, Bad Code: %d\n", icp->icmp6_code); break; } /* Print returned IP header information */ pr_retip((struct ip6_hdr *)(icp + 1), end); break; case ICMP6_PACKET_TOO_BIG: (void)printf("Packet too big mtu = %d\n", (int)ntohl(icp->icmp6_mtu)); pr_retip((struct ip6_hdr *)(icp + 1), end); break; case ICMP6_TIME_EXCEEDED: switch (icp->icmp6_code) { case ICMP6_TIME_EXCEED_TRANSIT: (void)printf("Time to live exceeded\n"); break; case ICMP6_TIME_EXCEED_REASSEMBLY: (void)printf("Frag reassembly time exceeded\n"); break; default: (void)printf("Time exceeded, Bad Code: %d\n", icp->icmp6_code); break; } pr_retip((struct ip6_hdr *)(icp + 1), end); break; case ICMP6_PARAM_PROB: (void)printf("Parameter problem: "); switch (icp->icmp6_code) { case ICMP6_PARAMPROB_HEADER: (void)printf("Erroneous Header "); break; case ICMP6_PARAMPROB_NEXTHEADER: (void)printf("Unknown Nextheader "); break; case ICMP6_PARAMPROB_OPTION: (void)printf("Unrecognized Option "); break; default: (void)printf("Bad code(%d) ", icp->icmp6_code); break; } (void)printf("pointer = 0x%02x\n", (u_int32_t)ntohl(icp->icmp6_pptr)); pr_retip((struct ip6_hdr *)(icp + 1), end); break; case ICMP6_ECHO_REQUEST: (void)printf("Echo Request"); /* XXX ID + Seq + Data */ break; case ICMP6_ECHO_REPLY: (void)printf("Echo Reply"); /* XXX ID + Seq + Data */ break; case ICMP6_MEMBERSHIP_QUERY: (void)printf("Listener Query"); break; case ICMP6_MEMBERSHIP_REPORT: (void)printf("Listener Report"); break; case ICMP6_MEMBERSHIP_REDUCTION: (void)printf("Listener Done"); break; case ND_ROUTER_SOLICIT: (void)printf("Router Solicitation"); break; case ND_ROUTER_ADVERT: (void)printf("Router Advertisement"); break; case ND_NEIGHBOR_SOLICIT: (void)printf("Neighbor Solicitation"); break; case ND_NEIGHBOR_ADVERT: (void)printf("Neighbor Advertisement"); break; case ND_REDIRECT: red = (struct nd_redirect *)icp; (void)printf("Redirect\n"); if (!inet_ntop(AF_INET6, &red->nd_rd_dst, ntop_buf, sizeof(ntop_buf))) strncpy(ntop_buf, "?", sizeof(ntop_buf)); (void)printf("Destination: %s", ntop_buf); if (!inet_ntop(AF_INET6, &red->nd_rd_target, ntop_buf, sizeof(ntop_buf))) strncpy(ntop_buf, "?", sizeof(ntop_buf)); (void)printf(" New Target: %s", ntop_buf); break; default: (void)printf("Bad ICMP type: %d", icp->icmp6_type); } } /* * pr_iph -- * Print an IP6 header. */ void pr_iph(struct ip6_hdr *ip6) { u_int32_t flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; u_int8_t tc; char ntop_buf[INET6_ADDRSTRLEN]; tc = *(&ip6->ip6_vfc + 1); /* XXX */ tc = (tc >> 4) & 0x0f; tc |= (ip6->ip6_vfc << 4); printf("Vr TC Flow Plen Nxt Hlim\n"); printf(" %1x %02x %05x %04x %02x %02x\n", (ip6->ip6_vfc & IPV6_VERSION_MASK) >> 4, tc, (u_int32_t)ntohl(flow), ntohs(ip6->ip6_plen), ip6->ip6_nxt, ip6->ip6_hlim); if (!inet_ntop(AF_INET6, &ip6->ip6_src, ntop_buf, sizeof(ntop_buf))) strncpy(ntop_buf, "?", sizeof(ntop_buf)); printf("%s->", ntop_buf); if (!inet_ntop(AF_INET6, &ip6->ip6_dst, ntop_buf, sizeof(ntop_buf))) strncpy(ntop_buf, "?", sizeof(ntop_buf)); printf("%s\n", ntop_buf); } /* * pr_addr -- * Return an ascii host address as a dotted quad and optionally with * a hostname. */ const char * pr_addr(struct sockaddr *addr, socklen_t addrlen) { static char buf[NI_MAXHOST]; int flag = 0; if ((options & F_HOSTNAME) == 0) flag |= NI_NUMERICHOST; if (getnameinfo(addr, addrlen, buf, sizeof(buf), NULL, 0, flag) == 0) return (buf); else return "?"; } /* * pr_retip -- * Dump some info on a returned (via ICMPv6) IPv6 packet. */ void pr_retip(struct ip6_hdr *ip6, u_char *end) { u_char *cp = (u_char *)ip6, nh; int hlen; if (end - (u_char *)ip6 < sizeof(*ip6)) { printf("IP6"); goto trunc; } pr_iph(ip6); hlen = sizeof(*ip6); nh = ip6->ip6_nxt; cp += hlen; while (end - cp >= 8) { switch (nh) { case IPPROTO_HOPOPTS: printf("HBH "); hlen = (((struct ip6_hbh *)cp)->ip6h_len+1) << 3; nh = ((struct ip6_hbh *)cp)->ip6h_nxt; break; case IPPROTO_DSTOPTS: printf("DSTOPT "); hlen = (((struct ip6_dest *)cp)->ip6d_len+1) << 3; nh = ((struct ip6_dest *)cp)->ip6d_nxt; break; case IPPROTO_FRAGMENT: printf("FRAG "); hlen = sizeof(struct ip6_frag); nh = ((struct ip6_frag *)cp)->ip6f_nxt; break; case IPPROTO_ROUTING: printf("RTHDR "); hlen = (((struct ip6_rthdr *)cp)->ip6r_len+1) << 3; nh = ((struct ip6_rthdr *)cp)->ip6r_nxt; break; case IPPROTO_AH: printf("AH "); hlen = (((struct ah *)cp)->ah_hl+2) << 2; nh = ((struct ah *)cp)->ah_nh; break; case IPPROTO_ICMPV6: printf("ICMP6: type = %d, code = %d\n", *cp, *(cp + 1)); return; case IPPROTO_ESP: printf("ESP\n"); return; case IPPROTO_TCP: printf("TCP: from port %u, to port %u (decimal)\n", (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); return; case IPPROTO_UDP: printf("UDP: from port %u, to port %u (decimal)\n", (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); return; default: printf("Unknown Header(%d)\n", nh); return; } if ((cp += hlen) >= end) goto trunc; } if (end - cp < 8) goto trunc; putchar('\n'); return; trunc: printf("...\n"); return; } void fill(char *bp, char *patp) { int ii, jj, kk; int pat[16]; char *cp; for (cp = patp; *cp; cp++) if (!isxdigit((unsigned char)*cp)) errx(1, "patterns must be specified as hex digits"); ii = sscanf(patp, "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], &pat[13], &pat[14], &pat[15]); /* xxx */ if (ii > 0) for (kk = 0; kk <= MAXDATALEN - (8 + sizeof(struct payload) + ii); kk += ii) for (jj = 0; jj < ii; ++jj) bp[jj + kk] = pat[jj]; if (!(options & F_QUIET)) { (void)printf("PATTERN: 0x"); for (jj = 0; jj < ii; ++jj) (void)printf("%02x", bp[jj] & 0xFF); (void)printf("\n"); } } void usage(void) { (void)fprintf(stderr, "usage: ping6 [-dEefHmnqv] [-c count] [-g gateway] [-h hoplimit] " "[-I sourceaddr]\n\t[-i wait] [-l preload] [-p pattern] " "[-s packetsize] [-V rtable]\n\t[-w maxwait] host\n"); exit(1); }