diff options
Diffstat (limited to 'network_cmds/traceroute6.tproj/traceroute6.c')
| -rw-r--r-- | network_cmds/traceroute6.tproj/traceroute6.c | 1423 |
1 files changed, 1423 insertions, 0 deletions
diff --git a/network_cmds/traceroute6.tproj/traceroute6.c b/network_cmds/traceroute6.tproj/traceroute6.c new file mode 100644 index 0000000..1de7809 --- /dev/null +++ b/network_cmds/traceroute6.tproj/traceroute6.c @@ -0,0 +1,1423 @@ +/* $KAME: traceroute6.c,v 1.68 2004/01/25 11:16:12 suz 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. + */ + +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Van Jacobson. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#include <sys/cdefs.h> + +#ifndef lint +__unused static char copyright[] = +"@(#) Copyright (c) 1990, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +/* + * traceroute host - trace the route ip packets follow going to "host". + * + * Attempt to trace the route an ip packet would follow to some + * internet host. We find out intermediate hops by launching probe + * packets with a small ttl (time to live) then listening for an + * icmp "time exceeded" reply from a gateway. We start our probes + * with a ttl of one and increase by one until we get an icmp "port + * unreachable" (which means we got to "host") or hit a max (which + * defaults to 30 hops & can be changed with the -m flag). Three + * probes (change with -q flag) are sent at each ttl setting and a + * line is printed showing the ttl, address of the gateway and + * round trip time of each probe. If the probe answers come from + * different gateways, the address of each responding system will + * be printed. If there is no response within a 5 sec. timeout + * interval (changed with the -w flag), a "*" is printed for that + * probe. + * + * Probe packets are UDP format. We don't want the destination + * host to process them so the destination port is set to an + * unlikely value (if some clod on the destination is using that + * value, it can be changed with the -p flag). + * + * A sample use might be: + * + * [yak 71]% traceroute nis.nsf.net. + * traceroute to nis.nsf.net (35.1.1.48), 30 hops max, 56 byte packet + * 1 helios.ee.lbl.gov (128.3.112.1) 19 ms 19 ms 0 ms + * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms + * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 39 ms 19 ms + * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 39 ms + * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 39 ms 39 ms 39 ms + * 6 128.32.197.4 (128.32.197.4) 40 ms 59 ms 59 ms + * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 59 ms + * 8 129.140.70.13 (129.140.70.13) 99 ms 99 ms 80 ms + * 9 129.140.71.6 (129.140.71.6) 139 ms 239 ms 319 ms + * 10 129.140.81.7 (129.140.81.7) 220 ms 199 ms 199 ms + * 11 nic.merit.edu (35.1.1.48) 239 ms 239 ms 239 ms + * + * Note that lines 2 & 3 are the same. This is due to a buggy + * kernel on the 2nd hop system -- lbl-csam.arpa -- that forwards + * packets with a zero ttl. + * + * A more interesting example is: + * + * [yak 72]% traceroute allspice.lcs.mit.edu. + * traceroute to allspice.lcs.mit.edu (18.26.0.115), 30 hops max + * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms + * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 19 ms 19 ms + * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 19 ms + * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 19 ms 39 ms 39 ms + * 5 ccn-nerif22.Berkeley.EDU (128.32.168.22) 20 ms 39 ms 39 ms + * 6 128.32.197.4 (128.32.197.4) 59 ms 119 ms 39 ms + * 7 131.119.2.5 (131.119.2.5) 59 ms 59 ms 39 ms + * 8 129.140.70.13 (129.140.70.13) 80 ms 79 ms 99 ms + * 9 129.140.71.6 (129.140.71.6) 139 ms 139 ms 159 ms + * 10 129.140.81.7 (129.140.81.7) 199 ms 180 ms 300 ms + * 11 129.140.72.17 (129.140.72.17) 300 ms 239 ms 239 ms + * 12 * * * + * 13 128.121.54.72 (128.121.54.72) 259 ms 499 ms 279 ms + * 14 * * * + * 15 * * * + * 16 * * * + * 17 * * * + * 18 ALLSPICE.LCS.MIT.EDU (18.26.0.115) 339 ms 279 ms 279 ms + * + * (I start to see why I'm having so much trouble with mail to + * MIT.) Note that the gateways 12, 14, 15, 16 & 17 hops away + * either don't send ICMP "time exceeded" messages or send them + * with a ttl too small to reach us. 14 - 17 are running the + * MIT C Gateway code that doesn't send "time exceeded"s. God + * only knows what's going on with 12. + * + * The silent gateway 12 in the above may be the result of a bug in + * the 4.[23]BSD network code (and its derivatives): 4.x (x <= 3) + * sends an unreachable message using whatever ttl remains in the + * original datagram. Since, for gateways, the remaining ttl is + * zero, the icmp "time exceeded" is guaranteed to not make it back + * to us. The behavior of this bug is slightly more interesting + * when it appears on the destination system: + * + * 1 helios.ee.lbl.gov (128.3.112.1) 0 ms 0 ms 0 ms + * 2 lilac-dmc.Berkeley.EDU (128.32.216.1) 39 ms 19 ms 39 ms + * 3 lilac-dmc.Berkeley.EDU (128.32.216.1) 19 ms 39 ms 19 ms + * 4 ccngw-ner-cc.Berkeley.EDU (128.32.136.23) 39 ms 40 ms 19 ms + * 5 ccn-nerif35.Berkeley.EDU (128.32.168.35) 39 ms 39 ms 39 ms + * 6 csgw.Berkeley.EDU (128.32.133.254) 39 ms 59 ms 39 ms + * 7 * * * + * 8 * * * + * 9 * * * + * 10 * * * + * 11 * * * + * 12 * * * + * 13 rip.Berkeley.EDU (128.32.131.22) 59 ms ! 39 ms ! 39 ms ! + * + * Notice that there are 12 "gateways" (13 is the final + * destination) and exactly the last half of them are "missing". + * What's really happening is that rip (a Sun-3 running Sun OS3.5) + * is using the ttl from our arriving datagram as the ttl in its + * icmp reply. So, the reply will time out on the return path + * (with no notice sent to anyone since icmp's aren't sent for + * icmp's) until we probe with a ttl that's at least twice the path + * length. I.e., rip is really only 7 hops away. A reply that + * returns with a ttl of 1 is a clue this problem exists. + * Traceroute prints a "!" after the time if the ttl is <= 1. + * Since vendors ship a lot of obsolete (DEC's Ultrix, Sun 3.x) or + * non-standard (HPUX) software, expect to see this problem + * frequently and/or take care picking the target host of your + * probes. + * + * Other possible annotations after the time are !H, !N, !P (got a host, + * network or protocol unreachable, respectively), !S or !F (source + * route failed or fragmentation needed -- neither of these should + * ever occur and the associated gateway is busted if you see one). If + * almost all the probes result in some kind of unreachable, traceroute + * will give up and exit. + * + * Notes + * ----- + * This program must be run by root or be setuid. (I suggest that + * you *don't* make it setuid -- casual use could result in a lot + * of unnecessary traffic on our poor, congested nets.) + * + * This program requires a kernel mod that does not appear in any + * system available from Berkeley: A raw ip socket using proto + * IPPROTO_RAW must interpret the data sent as an ip datagram (as + * opposed to data to be wrapped in an ip datagram). See the README + * file that came with the source to this program for a description + * of the mods I made to /sys/netinet/raw_ip.c. Your mileage may + * vary. But, again, ANY 4.x (x < 4) BSD KERNEL WILL HAVE TO BE + * MODIFIED TO RUN THIS PROGRAM. + * + * The udp port usage may appear bizarre (well, ok, it is bizarre). + * The problem is that an icmp message only contains 8 bytes of + * data from the original datagram. 8 bytes is the size of a udp + * header so, if we want to associate replies with the original + * datagram, the necessary information must be encoded into the + * udp header (the ip id could be used but there's no way to + * interlock with the kernel's assignment of ip id's and, anyway, + * it would have taken a lot more kernel hacking to allow this + * code to set the ip id). So, to allow two or more users to + * use traceroute simultaneously, we use this task's pid as the + * source port (the high bit is set to move the port number out + * of the "likely" range). To keep track of which probe is being + * replied to (so times and/or hop counts don't get confused by a + * reply that was delayed in transit), we increment the destination + * port number before each probe. + * + * Don't use this as a coding example. I was trying to find a + * routing problem and this code sort-of popped out after 48 hours + * without sleep. I was amazed it ever compiled, much less ran. + * + * I stole the idea for this program from Steve Deering. Since + * the first release, I've learned that had I attended the right + * IETF working group meetings, I also could have stolen it from Guy + * Almes or Matt Mathis. I don't know (or care) who came up with + * the idea first. I envy the originators' perspicacity and I'm + * glad they didn't keep the idea a secret. + * + * Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or + * enhancements to the original distribution. + * + * I've hacked up a round-trip-route version of this that works by + * sending a loose-source-routed udp datagram through the destination + * back to yourself. Unfortunately, SO many gateways botch source + * routing, the thing is almost worthless. Maybe one day... + * + * -- Van Jacobson (van@helios.ee.lbl.gov) + * Tue Dec 20 03:50:13 PST 1988 + */ + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/socket.h> +#include <sys/uio.h> +#include <sys/file.h> +#include <sys/ioctl.h> +#include <sys/sysctl.h> + +#include <netinet/in.h> + +#include <arpa/inet.h> + +#include <netdb.h> +#include <stdio.h> +#include <err.h> +#ifdef HAVE_POLL +#include <poll.h> +#endif +#include <errno.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <netinet/ip6.h> +#include <netinet/icmp6.h> +#include <netinet/udp.h> + +#ifdef IPSEC +#include <net/route.h> +#include <netinet6/ipsec.h> +#endif + +#define DUMMY_PORT 10010 + +#define MAXPACKET 65535 /* max ip packet size */ + +#ifndef HAVE_GETIPNODEBYNAME +#define getipnodebyname(x, y, z, u) gethostbyname2((x), (y)) +#define freehostent(x) +#endif + +/* + * format of a (udp) probe packet. + */ +struct tv32 { + u_int32_t tv32_sec; + u_int32_t tv32_usec; +}; + +struct opacket { + u_char seq; /* sequence number of this packet */ + u_char hops; /* hop limit of the packet */ + u_char pad[2]; + struct tv32 tv; /* time packet left */ +} __attribute__((__packed__)); + +u_char packet[512]; /* last inbound (icmp) packet */ +struct opacket *outpacket; /* last output (udp) packet */ + +int main(int, char *[]); +int wait_for_reply(int, struct msghdr *); +#ifdef IPSEC +#ifdef IPSEC_POLICY_IPSEC +int setpolicy(int so, char *policy); +#endif +#endif +void send_probe(int, u_long); +void *get_uphdr(struct ip6_hdr *, u_char *); +int get_hoplim(struct msghdr *); +double deltaT(struct timeval *, struct timeval *); +char *pr_type(int); +int packet_ok(struct msghdr *, int, int); +void print(struct msghdr *, int); +const char *inetname(struct sockaddr *); +void usage(void); + +int rcvsock; /* receive (icmp) socket file descriptor */ +int sndsock; /* send (udp) socket file descriptor */ + +struct msghdr rcvmhdr; +struct iovec rcviov[2]; +int rcvhlim; +struct in6_pktinfo *rcvpktinfo; + +struct sockaddr_in6 Src, Dst, Rcv; +u_long datalen; /* How much data */ +#define ICMP6ECHOLEN 8 +/* XXX: 2064 = 127(max hops in type 0 rthdr) * sizeof(ip6_hdr) + 16(margin) */ +char rtbuf[2064]; +#ifdef USE_RFC2292BIS +struct ip6_rthdr *rth; +#endif +struct cmsghdr *cmsg; + +char *source = 0; +char *hostname; + +u_long nprobes = 3; +u_long first_hop = 1; +u_long max_hops = 30; +u_int16_t srcport; +u_int16_t port = 32768+666; /* start udp dest port # for probe packets */ +u_int16_t ident; +int options; /* socket options */ +int verbose; +int waittime = 5; /* time to wait for response (in seconds) */ +int nflag; /* print addresses numerically */ +int useproto = IPPROTO_UDP; /* protocol to use to send packet */ +int lflag; /* print both numerical address & hostname */ + +int +main(argc, argv) + int argc; + char *argv[]; +{ + int mib[4] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM }; + char hbuf[NI_MAXHOST], src0[NI_MAXHOST], *ep; + int ch, i, on = 1, seq, rcvcmsglen, error, minlen; + struct addrinfo hints, *res; + static u_char *rcvcmsgbuf; + u_long probe, hops, lport; + struct hostent *hp; + size_t size; + + /* + * Receive ICMP + */ + if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) { + perror("socket(ICMPv6)"); + exit(5); + } + + size = sizeof(i); + (void) sysctl(mib, sizeof(mib)/sizeof(mib[0]), &i, &size, NULL, 0); + max_hops = i; + + /* specify to tell receiving interface */ +#ifdef IPV6_RECVPKTINFO + if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on, + sizeof(on)) < 0) + err(1, "setsockopt(IPV6_RECVPKTINFO)"); +#else /* old adv. API */ + if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_PKTINFO, &on, + sizeof(on)) < 0) + err(1, "setsockopt(IPV6_PKTINFO)"); +#endif + + /* specify to tell value of hoplimit field of received IP6 hdr */ +#ifdef IPV6_RECVHOPLIMIT + if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on, + sizeof(on)) < 0) + err(1, "setsockopt(IPV6_RECVHOPLIMIT)"); +#else /* old adv. API */ + if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on, + sizeof(on)) < 0) + err(1, "setsockopt(IPV6_HOPLIMIT)"); +#endif + + seq = 0; + + while ((ch = getopt(argc, argv, "df:g:Ilm:nNp:q:rs:Uvw:")) != -1) + switch (ch) { + case 'd': + options |= SO_DEBUG; + break; + case 'f': + ep = NULL; + errno = 0; + first_hop = strtoul(optarg, &ep, 0); + if (errno || !*optarg || *ep || first_hop > 255) { + fprintf(stderr, + "traceroute6: invalid min hoplimit.\n"); + exit(1); + } + break; + case 'g': + hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno); + if (hp == NULL) { + fprintf(stderr, + "traceroute6: unknown host %s\n", optarg); + exit(1); + } +#ifdef USE_RFC2292BIS + if (rth == NULL) { + /* + * XXX: We can't detect the number of + * intermediate nodes yet. + */ + if ((rth = inet6_rth_init((void *)rtbuf, + sizeof(rtbuf), IPV6_RTHDR_TYPE_0, + 0)) == NULL) { + fprintf(stderr, + "inet6_rth_init failed.\n"); + exit(1); + } + } + if (inet6_rth_add((void *)rth, + (struct in6_addr *)hp->h_addr)) { + fprintf(stderr, + "inet6_rth_add failed for %s\n", + optarg); + exit(1); + } +#else /* old advanced API */ + if (cmsg == NULL) + cmsg = inet6_rthdr_init(rtbuf, IPV6_RTHDR_TYPE_0); + inet6_rthdr_add(cmsg, (struct in6_addr *)hp->h_addr, + IPV6_RTHDR_LOOSE); +#endif + freehostent(hp); + break; + case 'I': + useproto = IPPROTO_ICMPV6; + ident = htons(getpid() & 0xffff); /* same as ping6 */ + break; + case 'l': + lflag++; + break; + case 'm': + ep = NULL; + errno = 0; + max_hops = strtoul(optarg, &ep, 0); + if (errno || !*optarg || *ep || max_hops > 255) { + fprintf(stderr, + "traceroute6: invalid max hoplimit.\n"); + exit(1); + } + break; + case 'n': + nflag++; + break; + case 'N': + useproto = IPPROTO_NONE; + break; + case 'p': + ep = NULL; + errno = 0; + lport = strtoul(optarg, &ep, 0); + if (errno || !*optarg || *ep) { + fprintf(stderr, "traceroute6: invalid port.\n"); + exit(1); + } + if (lport == 0 || lport != (lport & 0xffff)) { + fprintf(stderr, + "traceroute6: port out of range.\n"); + exit(1); + } + port = lport & 0xffff; + break; + case 'q': + ep = NULL; + errno = 0; + nprobes = strtoul(optarg, &ep, 0); + if (errno || !*optarg || *ep) { + fprintf(stderr, + "traceroute6: invalid nprobes.\n"); + exit(1); + } + if (nprobes < 1) { + fprintf(stderr, + "traceroute6: nprobes must be >0.\n"); + exit(1); + } + break; + case 'r': + options |= SO_DONTROUTE; + break; + case 's': + /* + * set the ip source address of the outbound + * probe (e.g., on a multi-homed host). + */ + source = optarg; + break; + case 'v': + verbose++; + break; + case 'U': + useproto = IPPROTO_UDP; + break; + case 'w': + ep = NULL; + errno = 0; + waittime = strtoul(optarg, &ep, 0); + if (errno || !*optarg || *ep) { + fprintf(stderr, + "traceroute6: invalid wait time.\n"); + exit(1); + } + if (waittime < 1) { + fprintf(stderr, + "traceroute6: wait must be >= 1 sec.\n"); + exit(1); + } + break; + default: + usage(); + } + argc -= optind; + argv += optind; + + /* + * Open socket to send probe packets. + */ + switch (useproto) { + case IPPROTO_ICMPV6: + sndsock = rcvsock; + break; + case IPPROTO_UDP: + if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { + perror("socket(SOCK_DGRAM)"); + exit(5); + } + break; + case IPPROTO_NONE: + if ((sndsock = socket(AF_INET6, SOCK_RAW, IPPROTO_NONE)) < 0) { + perror("socket(SOCK_RAW)"); + exit(5); + } + break; + default: + fprintf(stderr, "traceroute6: unknown probe protocol %d", + useproto); + exit(5); + } + if (max_hops < first_hop) { + fprintf(stderr, + "traceroute6: max hoplimit must be larger than first hoplimit.\n"); + exit(1); + } + + /* revoke privs */ + seteuid(getuid()); + setuid(getuid()); + + if (argc < 1 || argc > 2) + usage(); + +#if 1 + setvbuf(stdout, NULL, _IOLBF, BUFSIZ); +#else + setlinebuf(stdout); +#endif + + memset(&hints, 0, sizeof(hints)); + hints.ai_family = PF_INET6; + hints.ai_socktype = SOCK_RAW; + hints.ai_protocol = IPPROTO_ICMPV6; + hints.ai_flags = AI_CANONNAME; + error = getaddrinfo(*argv, NULL, &hints, &res); + if (error) { + fprintf(stderr, + "traceroute6: %s\n", gai_strerror(error)); + exit(1); + } + if (res->ai_addrlen != sizeof(Dst)) { + fprintf(stderr, + "traceroute6: size of sockaddr mismatch\n"); + exit(1); + } + memcpy(&Dst, res->ai_addr, res->ai_addrlen); + hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv; + if (!hostname) { + fprintf(stderr, "traceroute6: not enough core\n"); + exit(1); + } + if (res->ai_next) { + if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, + sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) + strlcpy(hbuf, "?", sizeof(hbuf)); + fprintf(stderr, "traceroute6: Warning: %s has multiple " + "addresses; using %s\n", hostname, hbuf); + } + + if (*++argv) { + ep = NULL; + errno = 0; + datalen = strtoul(*argv, &ep, 0); + if (errno || !*argv || *ep) { + fprintf(stderr, + "traceroute6: invalid packet length.\n"); + exit(1); + } + } + switch (useproto) { + case IPPROTO_ICMPV6: + minlen = ICMP6ECHOLEN + sizeof(struct tv32); + break; + case IPPROTO_UDP: + minlen = sizeof(struct opacket); + break; + case IPPROTO_NONE: + minlen = 0; + datalen = 0; + break; + default: + fprintf(stderr, "traceroute6: unknown probe protocol %d.\n", + useproto); + exit(1); + } + if (datalen < minlen) + datalen = minlen; + else if (datalen >= MAXPACKET) { + fprintf(stderr, + "traceroute6: packet size must be %d <= s < %ld.\n", + minlen, (long)MAXPACKET); + exit(1); + } + outpacket = (struct opacket *)malloc((unsigned)datalen); + if (!outpacket) { + perror("malloc"); + exit(1); + } + (void) bzero((char *)outpacket, datalen); + + /* initialize msghdr for receiving packets */ + rcviov[0].iov_base = (caddr_t)packet; + rcviov[0].iov_len = sizeof(packet); + rcvmhdr.msg_name = (caddr_t)&Rcv; + rcvmhdr.msg_namelen = sizeof(Rcv); + rcvmhdr.msg_iov = rcviov; + rcvmhdr.msg_iovlen = 1; + rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) + + CMSG_SPACE(sizeof(int)); + if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL) { + fprintf(stderr, "traceroute6: malloc failed\n"); + exit(1); + } + rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf; + rcvmhdr.msg_controllen = rcvcmsglen; + + (void) setsockopt(rcvsock, SOL_SOCKET, SO_RECV_ANYIF, (char *)&on, + sizeof(on)); + if (options & SO_DEBUG) + (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG, + (char *)&on, sizeof(on)); + if (options & SO_DONTROUTE) + (void) setsockopt(rcvsock, SOL_SOCKET, SO_DONTROUTE, + (char *)&on, sizeof(on)); +#ifdef IPSEC +#ifdef IPSEC_POLICY_IPSEC + /* + * do not raise error even if setsockopt fails, kernel may have ipsec + * turned off. + */ + if (setpolicy(rcvsock, "in bypass") < 0) + errx(1, "%s", ipsec_strerror()); + if (setpolicy(rcvsock, "out bypass") < 0) + errx(1, "%s", ipsec_strerror()); +#else + { + int level = IPSEC_LEVEL_NONE; + + (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level, + sizeof(level)); + (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level, + sizeof(level)); +#ifdef IP_AUTH_TRANS_LEVEL + (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level, + sizeof(level)); +#else + (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level, + sizeof(level)); +#endif +#ifdef IP_AUTH_NETWORK_LEVEL + (void)setsockopt(rcvsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level, + sizeof(level)); +#endif + } +#endif /*IPSEC_POLICY_IPSEC*/ +#endif /*IPSEC*/ + +#ifdef SO_SNDBUF + i = datalen; + if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&i, + sizeof(i)) < 0 && useproto != IPPROTO_NONE) { + perror("setsockopt(SO_SNDBUF)"); + exit(6); + } +#endif /* SO_SNDBUF */ + if (options & SO_DEBUG) + (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG, + (char *)&on, sizeof(on)); + if (options & SO_DONTROUTE) + (void) setsockopt(sndsock, SOL_SOCKET, SO_DONTROUTE, + (char *)&on, sizeof(on)); +#ifdef USE_RFC2292BIS + if (rth) {/* XXX: there is no library to finalize the header... */ + rth->ip6r_len = rth->ip6r_segleft * 2; + if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_RTHDR, + (void *)rth, (rth->ip6r_len + 1) << 3)) { + fprintf(stderr, "setsockopt(IPV6_RTHDR): %s\n", + strerror(errno)); + exit(1); + } + } +#else /* old advanced API */ + if (cmsg != NULL) { + inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE); + if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_PKTOPTIONS, + rtbuf, cmsg->cmsg_len) < 0) { + fprintf(stderr, "setsockopt(IPV6_PKTOPTIONS): %s\n", + strerror(errno)); + exit(1); + } + } +#endif /* USE_RFC2292BIS */ +#ifdef IPSEC +#ifdef IPSEC_POLICY_IPSEC + /* + * do not raise error even if setsockopt fails, kernel may have ipsec + * turned off. + */ + if (setpolicy(sndsock, "in bypass") < 0) + errx(1, "%s", ipsec_strerror()); + if (setpolicy(sndsock, "out bypass") < 0) + errx(1, "%s", ipsec_strerror()); +#else + { + int level = IPSEC_LEVEL_BYPASS; + + (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_TRANS_LEVEL, &level, + sizeof(level)); + (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_ESP_NETWORK_LEVEL, &level, + sizeof(level)); +#ifdef IP_AUTH_TRANS_LEVEL + (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_TRANS_LEVEL, &level, + sizeof(level)); +#else + (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_LEVEL, &level, + sizeof(level)); +#endif +#ifdef IP_AUTH_NETWORK_LEVEL + (void)setsockopt(sndsock, IPPROTO_IPV6, IPV6_AUTH_NETWORK_LEVEL, &level, + sizeof(level)); +#endif + } +#endif /*IPSEC_POLICY_IPSEC*/ +#endif /*IPSEC*/ + + /* + * Source selection + */ + bzero(&Src, sizeof(Src)); + if (source) { + struct addrinfo hints, *res; + int error; + + memset(&hints, 0, sizeof(hints)); + hints.ai_family = AF_INET6; + hints.ai_socktype = SOCK_DGRAM; /*dummy*/ + hints.ai_flags = AI_NUMERICHOST; + error = getaddrinfo(source, "0", &hints, &res); + if (error) { + printf("traceroute6: %s: %s\n", source, + gai_strerror(error)); + exit(1); + } + if (res->ai_addrlen > sizeof(Src)) { + printf("traceroute6: %s: %s\n", source, + gai_strerror(error)); + exit(1); + } + memcpy(&Src, res->ai_addr, res->ai_addrlen); + freeaddrinfo(res); + } else { + struct sockaddr_in6 Nxt; + int dummy; + socklen_t len; + + Nxt = Dst; + Nxt.sin6_port = htons(DUMMY_PORT); + if (cmsg != NULL) + bcopy(inet6_rthdr_getaddr(cmsg, 1), &Nxt.sin6_addr, + sizeof(Nxt.sin6_addr)); + if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { + perror("socket"); + exit(1); + } + if (connect(dummy, (struct sockaddr *)&Nxt, Nxt.sin6_len) < 0) { + perror("connect"); + exit(1); + } + len = sizeof(Src); + if (getsockname(dummy, (struct sockaddr *)&Src, &len) < 0) { + perror("getsockname"); + exit(1); + } + if (getnameinfo((struct sockaddr *)&Src, Src.sin6_len, + src0, sizeof(src0), NULL, 0, NI_NUMERICHOST)) { + fprintf(stderr, "getnameinfo failed for source\n"); + exit(1); + } + source = src0; + close(dummy); + } + + Src.sin6_port = htons(0); + if (bind(sndsock, (struct sockaddr *)&Src, Src.sin6_len) < 0) { + perror("bind"); + exit(1); + } + + { + socklen_t len; + + len = sizeof(Src); + if (getsockname(sndsock, (struct sockaddr *)&Src, &len) < 0) { + perror("getsockname"); + exit(1); + } + srcport = ntohs(Src.sin6_port); + } + + /* + * Message to users + */ + if (getnameinfo((struct sockaddr *)&Dst, Dst.sin6_len, hbuf, + sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) + strlcpy(hbuf, "(invalid)", sizeof(hbuf)); + fprintf(stderr, "traceroute6"); + fprintf(stderr, " to %s (%s)", hostname, hbuf); + if (source) + fprintf(stderr, " from %s", source); + fprintf(stderr, ", %lu hops max, %lu byte packets\n", + max_hops, datalen); + (void) fflush(stderr); + + if (first_hop > 1) + printf("Skipping %lu intermediate hops\n", first_hop - 1); + + /* + * Main loop + */ + for (hops = first_hop; hops <= max_hops; ++hops) { + struct in6_addr lastaddr; + int got_there = 0; + int unreachable = 0; + + printf("%2lu ", hops); + bzero(&lastaddr, sizeof(lastaddr)); + for (probe = 0; probe < nprobes; ++probe) { + int cc; + struct timeval t1, t2; + + (void) gettimeofday(&t1, NULL); + send_probe(++seq, hops); + while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) { + (void) gettimeofday(&t2, NULL); + if ((i = packet_ok(&rcvmhdr, cc, seq))) { + if (!IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr, + &lastaddr)) { + if (probe > 0) + fputs("\n ", stdout); + print(&rcvmhdr, cc); + lastaddr = Rcv.sin6_addr; + } + printf(" %.3f ms", deltaT(&t1, &t2)); + switch (i - 1) { + case ICMP6_DST_UNREACH_NOROUTE: + ++unreachable; + printf(" !N"); + break; + case ICMP6_DST_UNREACH_ADMIN: + ++unreachable; + printf(" !P"); + break; + case ICMP6_DST_UNREACH_NOTNEIGHBOR: + ++unreachable; + printf(" !S"); + break; + case ICMP6_DST_UNREACH_ADDR: + ++unreachable; + printf(" !A"); + break; + case ICMP6_DST_UNREACH_NOPORT: + if (rcvhlim >= 0 && + rcvhlim <= 1) + printf(" !"); + ++got_there; + break; + } + break; + } + } + if (cc == 0) + printf(" *"); + (void) fflush(stdout); + } + putchar('\n'); + if (got_there || + (unreachable > 0 && unreachable >= ((nprobes + 1) / 2))) { + exit(0); + } + } + + exit(0); +} + +int +wait_for_reply(sock, mhdr) + int sock; + struct msghdr *mhdr; +{ +#ifdef HAVE_POLL + struct pollfd pfd[1]; + int cc = 0; + + pfd[0].fd = sock; + pfd[0].events = POLLIN; + pfd[0].revents = 0; + + if (poll(pfd, 1, waittime * 1000) > 0) + cc = recvmsg(rcvsock, mhdr, 0); + + return(cc); +#else + fd_set *fdsp; + struct timeval wait; + int cc = 0, fdsn; + + fdsn = howmany(sock + 1, NFDBITS) * sizeof(fd_mask); + if ((fdsp = (fd_set *)malloc(fdsn)) == NULL) + err(1, "malloc"); + memset(fdsp, 0, fdsn); + FD_SET(sock, fdsp); + wait.tv_sec = waittime; wait.tv_usec = 0; + + if (select(sock+1, fdsp, (fd_set *)0, (fd_set *)0, &wait) > 0) + cc = recvmsg(rcvsock, mhdr, 0); + + free(fdsp); + return(cc); +#endif +} + +#ifdef IPSEC +#ifdef IPSEC_POLICY_IPSEC +int +setpolicy(so, policy) + int so; + char *policy; +{ + char *buf; + + buf = ipsec_set_policy(policy, strlen(policy)); + if (buf == NULL) { + warnx("%s", ipsec_strerror()); + return -1; + } + (void)setsockopt(so, IPPROTO_IPV6, IPV6_IPSEC_POLICY, + buf, ipsec_get_policylen(buf)); + + free(buf); + + return 0; +} +#endif +#endif + +void +send_probe(seq, hops) + int seq; + u_long hops; +{ + struct icmp6_hdr *icp; + struct opacket *op; + struct timeval tv; + struct tv32 tv32; + int i; + + i = hops; + if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS, + (char *)&i, sizeof(i)) < 0) { + perror("setsockopt IPV6_UNICAST_HOPS"); + } + + Dst.sin6_port = htons(port + seq); + (void) gettimeofday(&tv, NULL); + tv32.tv32_sec = htonl(tv.tv_sec); + tv32.tv32_usec = htonl(tv.tv_usec); + + switch (useproto) { + case IPPROTO_ICMPV6: + icp = (struct icmp6_hdr *)outpacket; + + icp->icmp6_type = ICMP6_ECHO_REQUEST; + icp->icmp6_code = 0; + icp->icmp6_cksum = 0; + icp->icmp6_id = ident; + icp->icmp6_seq = htons(seq); + bcopy(&tv32, ((u_int8_t *)outpacket + ICMP6ECHOLEN), + sizeof(tv32)); + break; + case IPPROTO_UDP: + op = outpacket; + + op->seq = seq; + op->hops = hops; + bcopy(&tv32, &op->tv, sizeof tv32); + break; + case IPPROTO_NONE: + /* No space for anything. No harm as seq/tv32 are decorative. */ + break; + default: + fprintf(stderr, "Unknown probe protocol %d.\n", useproto); + exit(1); + } + + i = sendto(sndsock, (char *)outpacket, datalen, 0, + (struct sockaddr *)&Dst, Dst.sin6_len); + if (i < 0 || i != datalen) { + if (i < 0) + perror("sendto"); + printf("traceroute6: wrote %s %lu chars, ret=%d\n", + hostname, datalen, i); + (void) fflush(stdout); + } +} + +int +get_hoplim(mhdr) + 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 && + cm->cmsg_type == IPV6_HOPLIMIT && + cm->cmsg_len == CMSG_LEN(sizeof(int))) + return(*(int *)CMSG_DATA(cm)); + } + + return(-1); +} + +double +deltaT(t1p, t2p) + struct timeval *t1p, *t2p; +{ + double dt; + + dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 + + (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0; + return (dt); +} + +/* + * Convert an ICMP "type" field to a printable string. + */ +char * +pr_type(t0) + int t0; +{ + u_char t = t0 & 0xff; + char *cp; + + switch (t) { + case ICMP6_DST_UNREACH: + cp = "Destination Unreachable"; + break; + case ICMP6_PACKET_TOO_BIG: + cp = "Packet Too Big"; + break; + case ICMP6_TIME_EXCEEDED: + cp = "Time Exceeded"; + break; + case ICMP6_PARAM_PROB: + cp = "Parameter Problem"; + break; + case ICMP6_ECHO_REQUEST: + cp = "Echo Request"; + break; + case ICMP6_ECHO_REPLY: + cp = "Echo Reply"; + break; + case ICMP6_MEMBERSHIP_QUERY: + cp = "Group Membership Query"; + break; + case ICMP6_MEMBERSHIP_REPORT: + cp = "Group Membership Report"; + break; + case ICMP6_MEMBERSHIP_REDUCTION: + cp = "Group Membership Reduction"; + break; + case ND_ROUTER_SOLICIT: + cp = "Router Solicitation"; + break; + case ND_ROUTER_ADVERT: + cp = "Router Advertisement"; + break; + case ND_NEIGHBOR_SOLICIT: + cp = "Neighbor Solicitation"; + break; + case ND_NEIGHBOR_ADVERT: + cp = "Neighbor Advertisement"; + break; + case ND_REDIRECT: + cp = "Redirect"; + break; + default: + cp = "Unknown"; + break; + } + return cp; +} + +int +packet_ok(mhdr, cc, seq) + struct msghdr *mhdr; + int cc; + int seq; +{ + struct icmp6_hdr *icp; + struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; + u_char type, code; + char *buf = (char *)mhdr->msg_iov[0].iov_base; + struct cmsghdr *cm; + int *hlimp; + char hbuf[NI_MAXHOST]; + +#ifdef OLDRAWSOCKET + int hlen; + struct ip6_hdr *ip; +#endif + +#ifdef OLDRAWSOCKET + ip = (struct ip6_hdr *) buf; + hlen = sizeof(struct ip6_hdr); + if (cc < hlen + sizeof(struct icmp6_hdr)) { + if (verbose) { + if (getnameinfo((struct sockaddr *)from, from->sin6_len, + hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) + strlcpy(hbuf, "invalid", sizeof(hbuf)); + printf("packet too short (%d bytes) from %s\n", cc, + hbuf); + } + return (0); + } + cc -= hlen; + icp = (struct icmp6_hdr *)(buf + hlen); +#else + if (cc < sizeof(struct icmp6_hdr)) { + if (verbose) { + if (getnameinfo((struct sockaddr *)from, from->sin6_len, + hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) + strlcpy(hbuf, "invalid", sizeof(hbuf)); + printf("data too short (%d bytes) from %s\n", cc, hbuf); + } + return(0); + } + icp = (struct icmp6_hdr *)buf; +#endif + /* get optional information via advanced API */ + rcvpktinfo = NULL; + hlimp = NULL; + for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr); cm; + cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)) { + if (cm->cmsg_level == IPPROTO_IPV6 && + cm->cmsg_type == IPV6_PKTINFO && + cm->cmsg_len == + CMSG_LEN(sizeof(struct in6_pktinfo))) + rcvpktinfo = (struct in6_pktinfo *)(CMSG_DATA(cm)); + + if (cm->cmsg_level == IPPROTO_IPV6 && + cm->cmsg_type == IPV6_HOPLIMIT && + cm->cmsg_len == CMSG_LEN(sizeof(int))) + hlimp = (int *)CMSG_DATA(cm); + } + if (rcvpktinfo == NULL || hlimp == NULL) { + warnx("failed to get received hop limit or packet info"); +#if 0 + return(0); +#else + rcvhlim = 0; /*XXX*/ +#endif + } + else + rcvhlim = *hlimp; + + type = icp->icmp6_type; + code = icp->icmp6_code; + if ((type == ICMP6_TIME_EXCEEDED && code == ICMP6_TIME_EXCEED_TRANSIT) + || type == ICMP6_DST_UNREACH) { + struct ip6_hdr *hip; + void *up; + + hip = (struct ip6_hdr *)(icp + 1); + if ((up = get_uphdr(hip, (u_char *)(buf + cc))) == NULL) { + if (verbose) + warnx("failed to get upper layer header"); + return(0); + } + switch (useproto) { + case IPPROTO_ICMPV6: + if (((struct icmp6_hdr *)up)->icmp6_id == ident && + ((struct icmp6_hdr *)up)->icmp6_seq == htons(seq)) + return (type == ICMP6_TIME_EXCEEDED ? + -1 : code + 1); + break; + case IPPROTO_UDP: + if (((struct udphdr *)up)->uh_sport == htons(srcport) && + ((struct udphdr *)up)->uh_dport == htons(port + seq)) + return (type == ICMP6_TIME_EXCEEDED ? + -1 : code + 1); + break; + case IPPROTO_NONE: + return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1); + default: + fprintf(stderr, "Unknown probe proto %d.\n", useproto); + break; + } + } else if (useproto == IPPROTO_ICMPV6 && type == ICMP6_ECHO_REPLY) { + if (icp->icmp6_id == ident && + icp->icmp6_seq == htons(seq)) + return (ICMP6_DST_UNREACH_NOPORT + 1); + } + if (verbose) { + char sbuf[NI_MAXHOST+1], dbuf[INET6_ADDRSTRLEN]; + u_int8_t *p; + int i; + + if (getnameinfo((struct sockaddr *)from, from->sin6_len, + sbuf, sizeof(sbuf), NULL, 0, NI_NUMERICHOST) != 0) + strlcpy(sbuf, "invalid", sizeof(sbuf)); + printf("\n%d bytes from %s to %s", cc, sbuf, + rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, + dbuf, sizeof(dbuf)) : "?"); + printf(": icmp type %d (%s) code %d\n", type, pr_type(type), + icp->icmp6_code); + p = (u_int8_t *)(icp + 1); +#define WIDTH 16 + for (i = 0; i < cc; i++) { + if (i % WIDTH == 0) + printf("%04x:", i); + if (i % 4 == 0) + printf(" "); + printf("%02x", p[i]); + if (i % WIDTH == WIDTH - 1) + printf("\n"); + } + if (cc % WIDTH != 0) + printf("\n"); + } + return(0); +} + +/* + * Increment pointer until find the UDP or ICMP header. + */ +void * +get_uphdr(ip6, lim) + struct ip6_hdr *ip6; + u_char *lim; +{ + u_char *cp = (u_char *)ip6, nh; + int hlen; + static u_char none_hdr[1]; /* Fake pointer for IPPROTO_NONE. */ + + if (cp + sizeof(*ip6) > lim) + return(NULL); + + nh = ip6->ip6_nxt; + cp += sizeof(struct ip6_hdr); + + while (lim - cp >= (nh == IPPROTO_NONE ? 0 : 8)) { + switch (nh) { + case IPPROTO_ESP: + case IPPROTO_TCP: + return(NULL); + case IPPROTO_ICMPV6: + return(useproto == nh ? cp : NULL); + case IPPROTO_UDP: + return(useproto == nh ? cp : NULL); + case IPPROTO_NONE: + return(useproto == nh ? none_hdr : NULL); + case IPPROTO_FRAGMENT: + hlen = sizeof(struct ip6_frag); + nh = ((struct ip6_frag *)cp)->ip6f_nxt; + break; + case IPPROTO_AH: + hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2; + nh = ((struct ip6_ext *)cp)->ip6e_nxt; + break; + default: + hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3; + nh = ((struct ip6_ext *)cp)->ip6e_nxt; + break; + } + + cp += hlen; + } + + return(NULL); +} + +void +print(mhdr, cc) + struct msghdr *mhdr; + int cc; +{ + struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; + char hbuf[NI_MAXHOST]; + + if (getnameinfo((struct sockaddr *)from, from->sin6_len, + hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) + strlcpy(hbuf, "invalid", sizeof(hbuf)); + if (nflag) + printf(" %s", hbuf); + else if (lflag) + printf(" %s (%s)", inetname((struct sockaddr *)from), hbuf); + else + printf(" %s", inetname((struct sockaddr *)from)); + + if (verbose) { +#ifdef OLDRAWSOCKET + printf(" %d bytes to %s", cc, + rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, + hbuf, sizeof(hbuf)) : "?"); +#else + printf(" %d bytes of data to %s", cc, + rcvpktinfo ? inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr, + hbuf, sizeof(hbuf)) : "?"); +#endif + } +} + +/* + * Construct an Internet address representation. + * If the nflag has been supplied, give + * numeric value, otherwise try for symbolic name. + */ +const char * +inetname(sa) + struct sockaddr *sa; +{ + static char line[NI_MAXHOST], domain[MAXHOSTNAMELEN + 1]; + static int first = 1; + char *cp; + + if (first && !nflag) { + first = 0; + if (gethostname(domain, sizeof(domain)) == 0 && + (cp = strchr(domain, '.'))) + (void) memmove(domain, cp + 1, strlen(cp + 1) + 1); + else + domain[0] = 0; + } + cp = NULL; + if (!nflag) { + if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0, + NI_NAMEREQD) == 0) { + if ((cp = strchr(line, '.')) && + !strcmp(cp + 1, domain)) + *cp = 0; + cp = line; + } + } + if (cp) + return cp; + + if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0, + NI_NUMERICHOST) != 0) + strlcpy(line, "invalid", sizeof(line)); + return line; +} + +void +usage() +{ + + fprintf(stderr, +"usage: traceroute6 [-dIlnNrUv] [-f firsthop] [-g gateway] [-m hoplimit]\n" +" [-p port] [-q probes] [-s src] [-w waittime] target [datalen]\n"); + exit(1); +} |