+++ /dev/null
-/* $OpenBSD: traceroute6.c,v 1.99 2014/04/23 09:24:36 florian Exp $ */
-/* $KAME: traceroute6.c,v 1.63 2002/10/24 12:53:25 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.
- */
-
-/*-
- * 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. 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.
- */
-
-/*
- * 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 a 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 <arpa/nameser.h>
-
-#include <netdb.h>
-#include <stdio.h>
-#include <err.h>
-#include <poll.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <netinet/ip6.h>
-#include <netinet/icmp6.h>
-#include <netinet/udp.h>
-
-#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 the data in a (udp) probe packet.
- */
-struct packetdata {
- u_char seq; /* sequence number of this packet */
- u_int8_t ttl; /* hop limit of the packet */
- u_char pad[2];
- u_int32_t sec; /* time packet left */
- u_int32_t usec;
-} __packed;
-
-u_char packet[512]; /* last inbound (icmp) packet */
-u_char *outpacket; /* last output (udp) packet */
-
-int main(int, char *[]);
-int wait_for_reply(int, struct msghdr *);
-void dump_packet(void);
-void build_probe6(int, u_int8_t, int, struct sockaddr *);
-void send_probe(int, u_int8_t, int, struct sockaddr *);
-struct udphdr *get_udphdr(struct ip6_hdr *, u_char *);
-int get_hoplim(struct msghdr *);
-double deltaT(struct timeval *, struct timeval *);
-char *pr_type(int);
-int packet_ok(int, struct msghdr *, int, int, int);
-int packet_ok6(struct msghdr *, int, int, int);
-void icmp_code(int, int, int *, int *);
-void icmp6_code(int, int *, int *);
-void print(struct sockaddr *, int, const char *);
-const char *inetname(struct sockaddr *);
-void print_asn(struct sockaddr_storage *);
-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;
-
-int datalen; /* How much data */
-#define ICMP6ECHOLEN 8
-
-char *source = 0;
-char *hostname;
-
-int nprobes = 3;
-u_int8_t max_hops = IPV6_DEFHLIM;
-u_int8_t first_hop = 1;
-u_int16_t srcport;
-u_int16_t port = 32768+666; /* start udp dest port # for probe packets */
-u_char proto = IPPROTO_UDP;
-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 dump;
-int Aflag; /* lookup ASN */
-
-extern char *__progname;
-
-int
-main(int argc, char *argv[])
-{
- int mib[4] = { CTL_NET, PF_INET6, IPPROTO_IPV6, IPV6CTL_DEFHLIM };
- int ttl_flag = 0, incflag = 1, sump = 0;
- char hbuf[NI_MAXHOST], *ep;
- int ch, i, on = 1, seq, probe, rcvcmsglen, error, minlen;
- struct addrinfo hints, *res;
- static u_char *rcvcmsgbuf;
- struct sockaddr_in6 from6, to6;
- struct sockaddr *from, *to;
- size_t size;
- u_int8_t hops;
- long l;
- uid_t uid;
- u_int rtableid;
- const char *errstr;
- socklen_t len;
-
- /*
- * Receive ICMP
- */
- if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0)
- err(5, "socket(ICMPv6)");
- if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
- err(5, "socket(SOCK_DGRAM)");
-
- /* revoke privs */
- uid = getuid();
- if (setresuid(uid, uid, uid) == -1)
- err(1, "setresuid");
-
- size = sizeof(i);
- if (sysctl(mib, sizeof(mib)/sizeof(mib[0]), &i, &size, NULL, 0) == -1)
- err(1, "sysctl");
- max_hops = i;
-
- /* specify to tell receiving interface */
- if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVPKTINFO, &on,
- sizeof(on)) < 0)
- err(1, "setsockopt(IPV6_RECVPKTINFO)");
-
- /* specify to tell value of hoplimit field of received IP6 hdr */
- if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, &on,
- sizeof(on)) < 0)
- err(1, "setsockopt(IPV6_RECVHOPLIMIT)");
-
- seq = 0;
-
- while ((ch = getopt(argc, argv, "AcDdf:Ilm:np:q:Ss:w:vV:")) != -1)
- switch (ch) {
- case 'A':
- Aflag++;
- break;
- case 'c':
- incflag = 0;
- break;
- case 'd':
- options |= SO_DEBUG;
- break;
- case 'D':
- dump = 1;
- break;
- case 'f':
- errno = 0;
- ep = NULL;
- l = strtol(optarg, &ep, 10);
- if (errno || !*optarg || *ep || l < 1 || l > max_hops)
- errx(1, "firsthop must be 1 to %u.", max_hops);
- first_hop = (u_int8_t)l;
- break;
- case 'I':
- proto = IPPROTO_ICMP;
- ident = htons(getpid() & 0xffff); /* same as ping6 */
- break;
- case 'l':
- ttl_flag++;
- break;
- case 'm':
- errno = 0;
- ep = NULL;
- l = strtol(optarg, &ep, 10);
- if (errno || !*optarg || *ep || l < first_hop ||
- l > IPV6_MAXHLIM)
- errx(1, "hoplimit must be %u to %u.", first_hop,
- IPV6_MAXHLIM);
- max_hops = (u_int8_t)l;
- break;
- case 'n':
- nflag++;
- break;
- case 'p':
- errno = 0;
- ep = NULL;
- l = strtol(optarg, &ep, 10);
- if (errno || !*optarg || *ep || l <= 0 || l >= 65536)
- errx(1, "port must be >0, <65536.");
- port = (u_int16_t)l;
- break;
- case 'q':
- errno = 0;
- ep = NULL;
- l = strtol(optarg, &ep, 10);
- if (errno || !*optarg || *ep || l < 1 || l > INT_MAX)
- errx(1, "nprobes must be >0.");
- nprobes = (int)l;
- break;
- case 's':
- /*
- * set the ip source address of the outbound
- * probe (e.g., on a multi-homed host).
- */
- source = optarg;
- break;
- case 'S':
- sump = 1;
- break;
- case 'v':
- verbose++;
- break;
- case 'V':
- rtableid = (unsigned int)strtonum(optarg, 0,
- RT_TABLEID_MAX, &errstr);
- if (errstr)
- errx(1, "rtable value is %s: %s",
- errstr, optarg);
- if (setsockopt(rcvsock, SOL_SOCKET, SO_RTABLE,
- &rtableid, sizeof(rtableid)) == -1)
- err(1, "setsockopt SO_RTABLE");
- if (setsockopt(sndsock, SOL_SOCKET, SO_RTABLE,
- &rtableid, sizeof(rtableid)) == -1)
- err(1, "setsockopt SO_RTABLE");
- break;
- case 'w':
- errno = 0;
- ep = NULL;
- l = strtol(optarg, &ep, 10);
- if (errno || !*optarg || *ep || l <= 1 || l > INT_MAX)
- errx(1, "wait must be >1 sec.");
- waittime = (int)l;
- break;
- default:
- usage();
- }
- argc -= optind;
- argv += optind;
-
- if (argc < 1 || argc > 2)
- usage();
-
- setvbuf(stdout, NULL, _IOLBF, 0);
-
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = PF_INET6;
- hints.ai_socktype = SOCK_RAW;
- hints.ai_protocol = 0;
- hints.ai_flags = AI_CANONNAME;
- if ((error = getaddrinfo(*argv, NULL, &hints, &res)))
- errx(1, "%s", gai_strerror(error));
-
- switch (res->ai_family) {
- case AF_INET6:
- if (res->ai_addrlen != sizeof(to6))
- errx(1, "size of sockaddr mismatch");
-
- to = (struct sockaddr *)&to6;
- from = (struct sockaddr *)&from6;
- break;
- default:
- errx(1, "unsupported AF: %d", res->ai_family);
- break;
- }
-
- memcpy(to, res->ai_addr, res->ai_addrlen);
-
- hostname = res->ai_canonname ? strdup(res->ai_canonname) : *argv;
- if (!hostname)
- errx(1, "malloc");
- if (res->ai_next) {
- if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf,
- sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
- strlcpy(hbuf, "?", sizeof(hbuf));
- warnx("Warning: %s has multiple "
- "addresses; using %s\n", hostname, hbuf);
- }
-
- if (*++argv) {
- errno = 0;
- ep = NULL;
- l = strtol(*argv, &ep, 10);
- if (errno || !*argv || *ep || l < 0 || l > INT_MAX)
- errx(1, "datalen out of range");
- datalen = (int)l;
- }
-
- switch (to->sa_family) {
- case AF_INET6:
- if (proto == IPPROTO_ICMP)
- minlen = ICMP6ECHOLEN + sizeof(struct packetdata);
- else
- minlen = sizeof(struct packetdata);
- if (datalen < minlen)
- datalen = minlen;
- else if (datalen >= MAXPACKET)
- errx(1, "packet size must be %d <= s < %ld.\n", minlen,
- (long)MAXPACKET);
-
- if ((outpacket = calloc(1, datalen)) == NULL)
- err(1, "calloc");
-
- /* initialize msghdr for receiving packets */
- rcviov[0].iov_base = (caddr_t)packet;
- rcviov[0].iov_len = sizeof(packet);
- rcvmhdr.msg_name = (caddr_t)&from6;
- rcvmhdr.msg_namelen = sizeof(from6);
- rcvmhdr.msg_iov = rcviov;
- rcvmhdr.msg_iovlen = 1;
- rcvcmsglen = CMSG_SPACE(sizeof(struct in6_pktinfo)) +
- CMSG_SPACE(sizeof(int));
-
- if ((rcvcmsgbuf = malloc(rcvcmsglen)) == NULL)
- errx(1, "malloc");
- rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
- rcvmhdr.msg_controllen = rcvcmsglen;
-
- /*
- * Send UDP or ICMP
- */
- if (proto == IPPROTO_ICMP) {
- close(sndsock);
- sndsock = rcvsock;
- }
-
- /*
- * Source selection
- */
- memset(&from6, 0, sizeof(from6));
- if (source) {
- memset(&hints, 0, sizeof(hints));
- hints.ai_family = AF_INET6;
- hints.ai_socktype = SOCK_DGRAM; /*dummy*/
- hints.ai_flags = AI_NUMERICHOST;
- if ((error = getaddrinfo(source, "0", &hints, &res)))
- errx(1, "%s: %s", source, gai_strerror(error));
- if (res->ai_addrlen != sizeof(from6))
- errx(1, "size of sockaddr mismatch");
- memcpy(&from6, res->ai_addr, res->ai_addrlen);
- freeaddrinfo(res);
- } else {
- struct sockaddr_in6 nxt;
- int dummy;
-
- nxt = to6;
- nxt.sin6_port = htons(DUMMY_PORT);
- if ((dummy = socket(AF_INET6, SOCK_DGRAM, 0)) < 0)
- err(1, "socket");
- if (connect(dummy, (struct sockaddr *)&nxt,
- nxt.sin6_len) < 0)
- err(1, "connect");
- len = sizeof(from6);
- if (getsockname(dummy, (struct sockaddr *)&from6,
- &len) < 0)
- err(1, "getsockname");
- close(dummy);
- }
-
- from6.sin6_port = htons(0);
- if (bind(sndsock, (struct sockaddr *)&from6, from6.sin6_len) <
- 0)
- err(1, "bind sndsock");
-
- len = sizeof(from6);
- if (getsockname(sndsock, (struct sockaddr *)&from6, &len) < 0)
- err(1, "getsockname");
- srcport = ntohs(from6.sin6_port);
- break;
- default:
- errx(1, "unsupported AF: %d", to->sa_family);
- break;
- }
-
- if (options & SO_DEBUG) {
- (void) setsockopt(sndsock, SOL_SOCKET, SO_DEBUG,
- (char *)&on, sizeof(on));
- (void) setsockopt(rcvsock, SOL_SOCKET, SO_DEBUG,
- (char *)&on, sizeof(on));
- }
-
- if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen,
- sizeof(datalen)) < 0)
- err(6, "SO_SNDBUF");
-
- /*
- * Message to users
- */
- if (getnameinfo(to, to->sa_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, ", %u hops max, %d byte packets\n",
- max_hops, datalen);
- (void) fflush(stderr);
-
- if (first_hop > 1)
- printf("Skipping %u intermediate hops\n", first_hop - 1);
-
- /*
- * Main loop
- */
- for (hops = first_hop; hops <= max_hops; ++hops) {
- struct in6_addr lastaddr6;
- int got_there = 0, unreachable = 0, timeout = 0, loss;
-
- printf("%2u ", hops);
- memset(&lastaddr6, 0, sizeof(lastaddr6));
- for (probe = 0, loss = 0; probe < nprobes; ++probe) {
- int cc;
- struct timeval t1, t2;
-
- (void) gettimeofday(&t1, NULL);
- send_probe(++seq, hops, incflag, to);
- while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) {
- (void) gettimeofday(&t2, NULL);
- i = packet_ok(to->sa_family, &rcvmhdr, cc, seq,
- incflag);
- /* Skip short packet */
- if (i == 0)
- continue;
- if (to->sa_family == AF_INET6) {
- if (!IN6_ARE_ADDR_EQUAL(
- &from6.sin6_addr, &lastaddr6)) {
- print(from, cc, rcvpktinfo ?
- inet_ntop( AF_INET6,
- &rcvpktinfo->ipi6_addr,
- hbuf, sizeof(hbuf)) : "?");
- lastaddr6 = from6.sin6_addr;
- }
- } else
- errx(1, "unsupported AF: %d",
- to->sa_family);
-
- printf(" %g ms", deltaT(&t1, &t2));
- if (ttl_flag)
- printf(" (%u)", rcvhlim);
-
- /* time exceeded in transit */
- if (i == -1)
- break;
- icmp_code(to->sa_family, i - 1, &got_there,
- &unreachable);
- break;
- }
- if (cc == 0) {
- printf(" *");
- timeout++;
- loss++;
- }
- (void) fflush(stdout);
- }
- if (sump)
- printf(" (%d%% loss)", (loss * 100) / nprobes);
- putchar('\n');
- if (got_there ||
- (unreachable && (unreachable + timeout) >= nprobes))
- break;
- }
- exit(0);
-}
-
-int
-wait_for_reply(int sock, struct msghdr *mhdr)
-{
- 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);
-}
-
-void
-dump_packet(void)
-{
- u_char *p;
- int i;
-
- fprintf(stderr, "packet data:");
- for (p = (u_char*)outpacket, i = 0; i < datalen; i++) {
- if ((i % 24) == 0)
- fprintf(stderr, "\n ");
- fprintf(stderr, " %02x", *p++);
- }
- fprintf(stderr, "\n");
-}
-
-void
-build_probe6(int seq, u_int8_t hops, int iflag, struct sockaddr *to)
-{
- struct timeval tv;
- struct packetdata *op;
- int i;
-
- i = hops;
- if (setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
- (char *)&i, sizeof(i)) < 0)
- warn("setsockopt IPV6_UNICAST_HOPS");
-
- if (iflag)
- ((struct sockaddr_in6*)to)->sin6_port = htons(port + seq);
- else
- ((struct sockaddr_in6*)to)->sin6_port = htons(port);
- (void) gettimeofday(&tv, NULL);
-
- if (proto == IPPROTO_ICMP) {
- struct icmp6_hdr *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);
- op = (struct packetdata *)(outpacket + ICMP6ECHOLEN);
- } else
- op = (struct packetdata *)outpacket;
- op->seq = seq;
- op->ttl = hops;
- op->sec = htonl(tv.tv_sec);
- op->usec = htonl(tv.tv_usec);
-}
-
-void
-send_probe(int seq, u_int8_t hops, int iflag, struct sockaddr *to)
-{
- int i;
-
- switch (to->sa_family) {
- case AF_INET6:
- build_probe6(seq, hops, iflag, to);
- break;
- default:
- errx(1, "unsupported AF: %d", to->sa_family);
- break;
- }
-
- if (dump)
- dump_packet();
-
- i = sendto(sndsock, outpacket, datalen, 0, to, to->sa_len);
- if (i < 0 || i != datalen) {
- if (i < 0)
- warn("sendto");
- printf("%s: wrote %s %d chars, ret=%d\n", __progname, hostname,
- datalen, i);
- (void) fflush(stdout);
- }
-}
-
-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_level == IPPROTO_IPV6 &&
- cm->cmsg_type == IPV6_HOPLIMIT &&
- cm->cmsg_len == CMSG_LEN(sizeof(int)))
- return(*(int *)CMSG_DATA(cm));
- }
-
- return(-1);
-}
-
-double
-deltaT(struct timeval *t1p, struct timeval *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(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(int af, struct msghdr *mhdr, int cc, int seq, int iflag)
-{
- switch (af) {
- case AF_INET6:
- return packet_ok6(mhdr, cc, seq, iflag);
- break;
- default:
- errx(1, "unsupported AF: %d", af);
- break;
- }
-}
-
-int
-packet_ok6(struct msghdr *mhdr, int cc, int seq, int iflag)
-{
- 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];
- int useicmp = (proto == IPPROTO_ICMP);
-
- 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;
- /* 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");
- rcvhlim = 0; /*XXX*/
- } 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;
- struct udphdr *up;
-
- hip = (struct ip6_hdr *)(icp + 1);
- if ((up = get_udphdr(hip, (u_char *)(buf + cc))) == NULL) {
- if (verbose)
- warnx("failed to get upper layer header");
- return(0);
- }
- if (useicmp &&
- ((struct icmp6_hdr *)up)->icmp6_id == ident &&
- ((struct icmp6_hdr *)up)->icmp6_seq == htons(seq))
- return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1);
- else if (!useicmp &&
- up->uh_sport == htons(srcport) &&
- ((iflag && up->uh_dport == htons(port + seq)) ||
- (!iflag && up->uh_dport == htons(port))))
- return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1);
- } else if (useicmp && 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.
- */
-struct udphdr *
-get_udphdr(struct ip6_hdr *ip6, u_char *lim)
-{
- u_char *cp = (u_char *)ip6, nh;
- int hlen;
- int useicmp = (proto == IPPROTO_ICMP);
-
- if (cp + sizeof(*ip6) >= lim)
- return(NULL);
-
- nh = ip6->ip6_nxt;
- cp += sizeof(struct ip6_hdr);
-
- while (lim - cp >= 8) {
- switch (nh) {
- case IPPROTO_ESP:
- case IPPROTO_TCP:
- return(NULL);
- case IPPROTO_ICMPV6:
- return(useicmp ? (struct udphdr *)cp : NULL);
- case IPPROTO_UDP:
- return(useicmp ? NULL : (struct udphdr *)cp);
- 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(struct sockaddr *from, int cc, const char *to)
-{
- char hbuf[NI_MAXHOST];
- if (getnameinfo(from, from->sa_len,
- hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
- strlcpy(hbuf, "invalid", sizeof(hbuf));
- if (nflag)
- printf(" %s", hbuf);
- else
- printf(" %s (%s)", inetname(from), hbuf);
-
- if (Aflag)
- print_asn((struct sockaddr_storage *)from);
-
- if (verbose)
- printf(" %d bytes to %s", cc, to);
-}
-
-void icmp_code(int af, int code, int *got_there, int *unreachable)
-{
- switch (af) {
- case AF_INET6:
- return icmp6_code(code, got_there, unreachable);
- break;
- default:
- errx(1, "unsupported AF: %d", af);
- break;
- }
-}
-
-void
-icmp6_code(int code, int *got_there, int *unreachable)
-{
- switch (code) {
- 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;
- default:
- ++(*unreachable);
- printf(" !<%d>", code);
- break;
- }
-}
-
-/*
- * Construct an Internet address representation.
- */
-const char *
-inetname(struct sockaddr *sa)
-{
- static char line[NI_MAXHOST], domain[MAXHOSTNAMELEN + 1];
- static int first = 1;
- char *cp;
-
- if (first) {
- first = 0;
- if (gethostname(domain, sizeof(domain)) == 0 &&
- (cp = strchr(domain, '.')) != NULL)
- (void) strlcpy(domain, cp + 1, sizeof(domain));
- else
- domain[0] = 0;
- }
- if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
- NI_NAMEREQD) == 0) {
- if ((cp = strchr(line, '.')) != NULL && strcmp(cp + 1,
- domain) == 0)
- *cp = '\0';
- return (line);
- }
-
- if (getnameinfo(sa, sa->sa_len, line, sizeof(line), NULL, 0,
- NI_NUMERICHOST) != 0)
- return ("invalid");
- return (line);
-}
-
-void
-print_asn(struct sockaddr_storage *ss)
-{
- struct rrsetinfo *answers = NULL;
- int counter;
- const u_char *uaddr;
- char qbuf[MAXDNAME];
-
- switch (ss->ss_family) {
- case AF_INET:
- uaddr = (const u_char *)&((struct sockaddr_in *) ss)->sin_addr;
- if (snprintf(qbuf, sizeof qbuf, "%u.%u.%u.%u."
- "origin.asn.cymru.com",
- (uaddr[3] & 0xff), (uaddr[2] & 0xff),
- (uaddr[1] & 0xff), (uaddr[0] & 0xff)) >= sizeof (qbuf))
- return;
- break;
- case AF_INET6:
- uaddr = (const u_char *)&((struct sockaddr_in6 *) ss)->sin6_addr;
- if (snprintf(qbuf, sizeof qbuf,
- "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x."
- "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x."
- "origin6.asn.cymru.com",
- (uaddr[15] & 0x0f), ((uaddr[15] >>4)& 0x0f),
- (uaddr[14] & 0x0f), ((uaddr[14] >>4)& 0x0f),
- (uaddr[13] & 0x0f), ((uaddr[13] >>4)& 0x0f),
- (uaddr[12] & 0x0f), ((uaddr[12] >>4)& 0x0f),
- (uaddr[11] & 0x0f), ((uaddr[11] >>4)& 0x0f),
- (uaddr[10] & 0x0f), ((uaddr[10] >>4)& 0x0f),
- (uaddr[9] & 0x0f), ((uaddr[9] >>4)& 0x0f),
- (uaddr[8] & 0x0f), ((uaddr[8] >>4)& 0x0f),
- (uaddr[7] & 0x0f), ((uaddr[7] >>4)& 0x0f),
- (uaddr[6] & 0x0f), ((uaddr[6] >>4)& 0x0f),
- (uaddr[5] & 0x0f), ((uaddr[5] >>4)& 0x0f),
- (uaddr[4] & 0x0f), ((uaddr[4] >>4)& 0x0f),
- (uaddr[3] & 0x0f), ((uaddr[3] >>4)& 0x0f),
- (uaddr[2] & 0x0f), ((uaddr[2] >>4)& 0x0f),
- (uaddr[1] & 0x0f), ((uaddr[1] >>4)& 0x0f),
- (uaddr[0] & 0x0f), ((uaddr[0] >>4)& 0x0f)) >= sizeof (qbuf))
- return;
- break;
- default:
- return;
- }
-
- if (getrrsetbyname(qbuf, C_IN, T_TXT, 0, &answers) != 0)
- return;
- for (counter = 0; counter < answers->rri_nrdatas; counter++) {
- char *p, *as = answers->rri_rdatas[counter].rdi_data;
- as++; /* skip first byte, it contains length */
- if ((p = strchr(as,'|'))) {
- printf(counter ? ", " : " [");
- p[-1] = 0;
- printf("AS%s", as);
- }
- }
- if (counter)
- printf("]");
-
- freerrset(answers);
-}
-
-void
-usage(void)
-{
-
- fprintf(stderr,
-"usage: traceroute6 [-AcDdIlnSv] [-f firsthop] [-m hoplimit]\n"
-" [-p port] [-q probes] [-s src] [-V rtableid] [-w waittime]\n"
-" host [datalen]\n");
- exit(1);
-}
projects / openbsd / commitdiff