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authorshin <shin@FreeBSD.org>1999-12-28 02:37:14 +0000
committershin <shin@FreeBSD.org>1999-12-28 02:37:14 +0000
commit8c2ccb59caf882ac518eda1f570ea731d4466216 (patch)
treeec4d4f8bd121d60c04c8119810151af20c92b20b /usr.sbin/traceroute6
parentb39a79861ddfb250e941d89c255bcb8cda9481dc (diff)
downloadFreeBSD-src-8c2ccb59caf882ac518eda1f570ea731d4466216.zip
FreeBSD-src-8c2ccb59caf882ac518eda1f570ea731d4466216.tar.gz
Getaddrinfo(), getnameinfo(), and etc support in libc/net.
Several udp and raw apps IPv6 support. Reviewed by: freebsd-arch, cvs-committers Obtained from: KAME project
Diffstat (limited to 'usr.sbin/traceroute6')
-rw-r--r--usr.sbin/traceroute6/Makefile26
-rw-r--r--usr.sbin/traceroute6/traceroute6.896
-rw-r--r--usr.sbin/traceroute6/traceroute6.c1127
3 files changed, 1249 insertions, 0 deletions
diff --git a/usr.sbin/traceroute6/Makefile b/usr.sbin/traceroute6/Makefile
new file mode 100644
index 0000000..2b151a6
--- /dev/null
+++ b/usr.sbin/traceroute6/Makefile
@@ -0,0 +1,26 @@
+# Copyright (c) 1996 WIDE Project. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modifications, are permitted provided that the above copyright notice
+# and this paragraph are duplicated in all such forms and that any
+# documentation, advertising materials, and other materials related to
+# such distribution and use acknowledge that the software was developed
+# by the WIDE Project, Japan. The name of the Project may not be used to
+# endorse or promote products derived from this software without
+# specific prior written permission. THIS SOFTWARE IS PROVIDED ``AS IS''
+# AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
+# LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE.
+# $FreeBSD$
+
+PROG= traceroute6
+
+BINOWN= root
+BINGRP= bin
+BINMODE=4555
+
+CFLAGS+=-DINET6
+
+MAN8= traceroute6.8
+
+.include <bsd.prog.mk>
diff --git a/usr.sbin/traceroute6/traceroute6.8 b/usr.sbin/traceroute6/traceroute6.8
new file mode 100644
index 0000000..b98773f
--- /dev/null
+++ b/usr.sbin/traceroute6/traceroute6.8
@@ -0,0 +1,96 @@
+.\" 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.
+.\"
+.\" $Id: traceroute6.8,v 1.1.1.1 1999/08/08 23:32:38 itojun Exp $
+.\" $FreeBSD$
+.\"
+.Dd May 17, 1998
+.Dt TRACEROUTE6 8
+.Os KAME
+.\"
+.Sh NAME
+.Nm traceroute6
+.Nd print the route IPv6 packets will take to the destination
+.\"
+.Sh SYNOPSIS
+.Nm
+.Op Fl dlnrv
+.Op Fl m Ar hoplimit
+.Op Fl p Ar port
+.Op Fl q Ar probes
+.Op Fl s Ar src
+.Op Fl w Ar waittime
+.\"
+.Sh DESCRIPTION
+.Bl -tag -width Ds
+.It Fl d
+Debug mode.
+.It Fl m Ar hoplimit
+Specify maximum hoplimit.
+.It Fl l
+Print both host hostnames and numeric addresses.
+Normally
+.Nm
+prints only hostnames if
+.Fl n
+is not specified, and only numeric addresses if
+.Fl n
+is specified.
+.It Fl n
+Do not resolve numeric address to hostname.
+.It Fl p Ar port
+Set UDP port number to
+.Ar port .
+.It Fl q Ar probes
+Set the number of probe per hop count to
+.Ar probes .
+.It Fl r
+.It Fl s Ar src
+.Ar Src
+specifies the source IPv6 address to be used.
+.It Fl v
+Be verbose.
+.It Fl w Ar waittime
+Specify the delay time between probes.
+.El
+.\"
+.Sh RETURN VALUES
+.Nm Traceroute6
+will exit with 0 on success, and non-zero on errors.
+.\"
+.Sh SEE ALSO
+.Xr ping 8 ,
+.Xr ping6 8 ,
+.Xr traceroute 8
+.\"
+.Sh HISTORY
+The
+.Nm
+command first appeared in WIDE hydrangea IPv6 protocol stack kit.
+.\"
+.\" .Sh BUGS
+.\" (to be written)
diff --git a/usr.sbin/traceroute6/traceroute6.c b/usr.sbin/traceroute6/traceroute6.c
new file mode 100644
index 0000000..a1b665e
--- /dev/null
+++ b/usr.sbin/traceroute6/traceroute6.c
@@ -0,0 +1,1127 @@
+/*
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+/*-
+ * 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.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1990, 1993\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)traceroute.c 8.1 (Berkeley) 6/6/93";
+#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 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 <netinet/in.h>
+
+#include <arpa/inet.h>
+
+#include <netdb.h>
+#include <stdio.h>
+#include <err.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>
+
+#ifdef IPSEC
+#include <net/route.h>
+#include <netinet6/ipsec.h>
+#endif
+
+#define freehostent(hp)
+#define DUMMY_PORT 10010
+
+#define MAXPACKET 65535 /* max ip packet size */
+#ifndef MAXHOSTNAMELEN
+#define MAXHOSTNAMELEN 64
+#endif
+
+#ifndef FD_SET
+#define NFDBITS (8*sizeof(fd_set))
+#define FD_SETSIZE NFDBITS
+#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
+#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
+#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
+#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
+#endif
+
+#define Fprintf (void)fprintf
+#define Sprintf (void)sprintf
+#define Printf (void)printf
+
+/*
+ * format of a (udp) probe packet.
+ */
+struct opacket {
+ u_char seq; /* sequence number of this packet */
+ u_char hops; /* hop limit of the packet */
+ struct timeval tv; /* time packet left */
+};
+
+u_char packet[512]; /* last inbound (icmp) packet */
+struct opacket *outpacket; /* last output (udp) packet */
+
+int main __P((int, char *[]));
+int wait_for_reply __P((int, struct msghdr *));
+int setpolicy __P((int so, char *policy));
+void send_probe __P((int, int));
+struct udphdr *get_udphdr __P((struct ip6_hdr *, u_char *));
+int get_hoplim __P((struct msghdr *));
+double deltaT __P((struct timeval *, struct timeval *));
+char *pr_type __P((int));
+int packet_ok __P((struct msghdr *, int, int));
+void print __P((struct msghdr *, int));
+void tvsub __P((struct timeval *, struct timeval *));
+char *inetname __P((struct in6_addr *));
+void usage __P((void));
+
+int rcvsock; /* receive (icmp) socket file descriptor */
+int sndsock; /* send (udp) socket file descriptor */
+struct timezone tz; /* leftover */
+
+struct msghdr rcvmhdr;
+struct iovec rcviov[2];
+int rcvhlim;
+struct in6_pktinfo *rcvpktinfo;
+
+struct sockaddr_in6 Src, Dst, Rcv;
+struct sockaddr_in6 *src = &Src, *dst = &Dst, *rcv = &Rcv;
+int datalen; /* How much data */
+char rtbuf[1024]; /*XXX*/
+struct cmsghdr *cmsg;
+
+char *source = 0;
+char *hostname;
+
+int nprobes = 3;
+int max_hops = 30;
+u_short ident;
+u_short port = 32768+666; /* start udp dest port # for probe packets */
+int options; /* socket options */
+int verbose;
+int waittime = 5; /* time to wait for response (in seconds) */
+int nflag; /* print addresses numerically */
+int lflag; /* print both numerical address & hostname */
+
+char ntop_buf[INET6_ADDRSTRLEN]; /* for inet_ntop() */
+
+int
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+ extern char *optarg;
+ extern int optind;
+ struct hostent *hp;
+ int ch, i, on, probe, seq, hops;
+ static u_char rcvcmsgbuf[CMSG_SPACE(sizeof(struct in6_pktinfo))
+ + CMSG_SPACE(sizeof(int))];
+
+ on = 1;
+ seq = 0;
+
+ while ((ch = getopt(argc, argv, "dlm:np:q:rs:w:vg:")) != EOF)
+ switch(ch) {
+ case 'd':
+ options |= SO_DEBUG;
+ break;
+ case 'l':
+ lflag++;
+ break;
+ case 'g':
+ hp = getipnodebyname(optarg, AF_INET6, 0, &h_errno);
+ if (hp == NULL) {
+ Fprintf(stderr,
+ "traceroute6: unknown host %s\n", optarg);
+ exit(1);
+ }
+ 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);
+ break;
+ case 'm':
+ max_hops = atoi(optarg);
+ if (max_hops <= 1) {
+ Fprintf(stderr,
+ "traceroute6: max hoplimit must be >1.\n");
+ exit(1);
+ }
+ break;
+ case 'n':
+ nflag++;
+ break;
+ case 'p':
+ port = atoi(optarg);
+ if (port < 1) {
+ Fprintf(stderr,
+ "traceroute6: port must be >0.\n");
+ exit(1);
+ }
+ break;
+ case 'q':
+ nprobes = atoi(optarg);
+ 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 'w':
+ waittime = atoi(optarg);
+ if (waittime <= 1) {
+ Fprintf(stderr,
+ "traceroute6: wait must be >1 sec.\n");
+ exit(1);
+ }
+ break;
+ default:
+ usage();
+ }
+ argc -= optind;
+ argv += optind;
+
+ if (argc < 1)
+ usage();
+
+#if 1
+ setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
+#else
+ setlinebuf (stdout);
+#endif
+
+ (void) bzero((char *)dst, sizeof(Dst));
+ Dst.sin6_family = AF_INET6;
+
+ hp = (struct hostent *)gethostbyname2(*argv, AF_INET6);
+ if (hp == NULL) {
+ if (inet_pton(AF_INET6, *argv, &Dst.sin6_addr) != 1) {
+ (void)fprintf(stderr,
+ "traceroute6: unknown host %s\n", *argv);
+ exit(1);
+ }
+ hostname = *argv;
+ } else {
+ bcopy(hp->h_addr, (caddr_t)&Dst.sin6_addr, hp->h_length);
+ hostname = strdup(hp->h_name);
+ }
+ freehostent(hp);
+
+ if (*++argv)
+ datalen = atoi(*argv);
+ if (datalen < 0 || datalen >= MAXPACKET - sizeof(struct opacket)) {
+ Fprintf(stderr,
+ "traceroute6: packet size must be 0 <= s < %ld.\n",
+ (long)(MAXPACKET - sizeof(struct opacket)));
+ exit(1);
+ }
+ datalen += sizeof(struct opacket);
+ outpacket = (struct opacket *)malloc((unsigned)datalen);
+ if (! outpacket) {
+ perror("traceroute6: malloc");
+ exit(1);
+ }
+ (void) bzero((char *)outpacket, datalen);
+
+ /*
+ * Receive ICMP
+ */
+ if ((rcvsock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6)) < 0) {
+ perror("traceroute6: icmp socket");
+ exit(5);
+ }
+ /* 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;
+ rcvmhdr.msg_control = (caddr_t) rcvcmsgbuf;
+ rcvmhdr.msg_controllen = sizeof(rcvcmsgbuf);
+
+ /* specify to tell receiving interface */
+ if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_PKTINFO, &on,
+ sizeof(on)) < 0)
+ err(1, "setsockopt(IPV6_PKTINFO)");
+
+ /* specify to tell value of hoplimit field of received IP6 hdr */
+ if (setsockopt(rcvsock, IPPROTO_IPV6, IPV6_HOPLIMIT, &on,
+ sizeof(on)) < 0)
+ err(1, "setsockopt(IPV6_HOPLIMIT)");
+
+ 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, ipsec_strerror());
+ if (setpolicy(rcvsock, "out bypass") < 0)
+ errx(1, 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*/
+
+ /*
+ * Send UDP
+ */
+ if ((sndsock = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) {
+ perror("traceroute6: udp socket");
+ exit(5);
+ }
+#ifdef SO_SNDBUF
+ if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen,
+ sizeof(datalen)) < 0) {
+ perror("traceroute6: 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));
+ if (cmsg != NULL) {
+ inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
+ (void) setsockopt(sndsock, IPPROTO_IPV6, IPV6_PKTOPTIONS,
+ rtbuf, cmsg->cmsg_len);
+ }
+#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, ipsec_strerror());
+ if (setpolicy(sndsock, "out bypass") < 0)
+ errx(1, 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((char *)src, sizeof(Src));
+ if (source) {
+ if (inet_pton(AF_INET6, source, &Src.sin6_addr) != 1) {
+ Printf("traceroute6: unknown host %s\n", source);
+ exit(1);
+ }
+ } else {
+ struct sockaddr_in6 Nxt;
+ int dummy, len;
+
+ len = sizeof(Src);
+ 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") ;
+ }
+ if(-1 == connect(dummy, (struct sockaddr *)&Nxt, sizeof(Nxt)))
+ perror("connect");
+ if(-1 == getsockname(dummy, (struct sockaddr *)src, &len)) {
+ perror("getsockname");
+ printf("%d\n", errno);
+ }
+ close(dummy) ;
+ }
+ ident = (getpid() & 0xffff) | 0x8000;
+ Src.sin6_family = AF_INET6;
+ Src.sin6_port = htons(ident);
+ if (bind(sndsock, (struct sockaddr *)src, sizeof(Src)) < 0){
+ perror ("traceroute6: bind:");
+ exit (1);
+ }
+
+ /*
+ * Message to users
+ */
+ Fprintf(stderr, "traceroute to %s (%s)", hostname,
+ inet_ntop(AF_INET6, &Dst.sin6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+ if (source)
+ Fprintf(stderr, " from %s", source);
+ Fprintf(stderr, ", %d hops max, %d byte packets\n", max_hops, datalen);
+ (void) fflush(stderr);
+
+ /*
+ * Main loop
+ */
+ for (hops = 1; hops <= max_hops; ++hops) {
+ struct in6_addr lastaddr;
+ int got_there = 0;
+ int unreachable = 0;
+
+ Printf("%2d ", hops);
+ bzero(&lastaddr, sizeof(lastaddr));
+ for (probe = 0; probe < nprobes; ++probe) {
+ int cc;
+ struct timeval t1, t2;
+ struct timezone tz;
+
+ (void) gettimeofday(&t1, &tz);
+ send_probe(++seq, hops);
+ while ((cc = wait_for_reply(rcvsock, &rcvmhdr))) {
+ (void) gettimeofday(&t2, &tz);
+ if ((i = packet_ok(&rcvmhdr, cc, seq))) {
+ if (! IN6_ARE_ADDR_EQUAL(&Rcv.sin6_addr,
+ &lastaddr)) {
+ print(&rcvmhdr, cc);
+ lastaddr = Rcv.sin6_addr;
+ }
+ Printf(" %g 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;
+{
+ fd_set fds;
+ struct timeval wait;
+ int cc = 0;
+
+ FD_ZERO(&fds);
+ FD_SET(sock, &fds);
+ wait.tv_sec = waittime; wait.tv_usec = 0;
+
+ if (select(sock+1, &fds, (fd_set *)0, (fd_set *)0, &wait) > 0)
+ cc = recvmsg(rcvsock, mhdr, 0);
+
+ return(cc);
+}
+
+#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(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, hops;
+{
+ struct opacket *op = outpacket;
+ int i;
+
+ if(setsockopt(sndsock, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
+ (char *)&hops, sizeof(hops)) < 0) {
+ perror("setsockopt IPV6_UNICAST_HOPS");
+ }
+
+ Dst.sin6_port = htons(port + seq);
+
+ op->seq = seq;
+ op->hops = hops;
+ (void) gettimeofday(&op->tv, &tz);
+
+ i = sendto(sndsock, (char *)outpacket, datalen , 0,
+ (struct sockaddr *)dst, sizeof(Dst));
+ if (i < 0 || i != datalen) {
+ if (i<0)
+ perror("sendto");
+ Printf("traceroute6: wrote %s %d 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;
+{
+ register 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 = "Pakcet 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 = "Ridirect";
+ break;
+ default:
+ cp = "Unknown";
+ break;
+ }
+ return cp;
+}
+
+
+int
+packet_ok(mhdr, cc, seq)
+ struct msghdr *mhdr;
+ int cc;
+ int seq;
+{
+ register 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;
+
+#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)
+ Printf("packet too short (%d bytes) from %s\n", cc,
+ inet_ntop(AF_INET6, &from->sin6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+ return (0);
+ }
+ cc -= hlen;
+ icp = (struct icmp6_hdr *)(buf + hlen);
+#else
+ if (cc < sizeof(struct icmp6_hdr)) {
+ if (verbose)
+ Printf("data too short (%d bytes) from %s\n", cc,
+ inet_ntop(AF_INET6, &from->sin6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+ 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");
+ return(0);
+ }
+ 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 (up->uh_sport == htons(ident) &&
+ up->uh_dport == htons(port+seq))
+ return (type == ICMP6_TIME_EXCEEDED ? -1 : code + 1);
+ }
+ if (verbose) {
+ int i;
+ u_long *lp = (u_long *)(icp + 1);
+ char sbuf[INET6_ADDRSTRLEN+1], dbuf[INET6_ADDRSTRLEN];
+
+ Printf("\n%d bytes from %s to %s", cc,
+ inet_ntop(AF_INET6, &from->sin6_addr,
+ sbuf, sizeof(sbuf)),
+ 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);
+ for (i = 4; i < cc ; i += sizeof(long))
+ Printf("%2d: %8.8x\n", i, (u_int32_t)ntohl(*lp++));
+ }
+ return(0);
+}
+
+/*
+ * Increment pointer until find the UDP header.
+ */
+struct udphdr *
+get_udphdr(ip6, lim)
+ struct ip6_hdr *ip6;
+ u_char *lim;
+{
+ u_char *cp = (u_char *)ip6, nh;
+ int hlen;
+
+ 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:
+ case IPPROTO_ICMPV6:
+ return(NULL);
+ case IPPROTO_UDP:
+ return((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(mhdr, cc)
+ struct msghdr *mhdr;
+ int cc;
+{
+ struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name;
+
+ if (nflag) {
+ Printf(" %s", inet_ntop(AF_INET6, &from->sin6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+ }
+ else if (lflag) {
+ Printf(" %s (%s)", inetname(&from->sin6_addr),
+ inet_ntop(AF_INET6, &from->sin6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+ }
+ else {
+ Printf(" %s", inetname(&from->sin6_addr));
+ }
+
+ if (verbose) {
+#ifdef OLDRAWSOCKET
+ Printf(" %d bytes to %s", cc,
+ inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+#else
+ Printf(" %d bytes of data to %s", cc,
+ inet_ntop(AF_INET6, &rcvpktinfo->ipi6_addr,
+ ntop_buf, sizeof(ntop_buf)));
+#endif
+ }
+}
+
+/*
+ * Subtract 2 timeval structs: out = out - in.
+ * Out is assumed to be >= in.
+ */
+void
+tvsub(out, in)
+ register struct timeval *out, *in;
+{
+ if ((out->tv_usec -= in->tv_usec) < 0) {
+ out->tv_sec--;
+ out->tv_usec += 1000000;
+ }
+ out->tv_sec -= in->tv_sec;
+}
+
+
+/*
+ * Construct an Internet address representation.
+ * If the nflag has been supplied, give
+ * numeric value, otherwise try for symbolic name.
+ */
+char *
+inetname(in)
+ struct in6_addr *in;
+{
+ register char *cp;
+ static char line[50];
+ struct hostent *hp;
+ static char domain[MAXHOSTNAMELEN + 1];
+ static int first = 1;
+
+ if (first && !nflag) {
+ first = 0;
+ if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
+ (cp = index(domain, '.')))
+ (void) strcpy(domain, cp + 1);
+ else
+ domain[0] = 0;
+ }
+ cp = 0;
+ if (!nflag) {
+ /* hp = (struct hostent *)addr2hostname(in, sizeof(*in), AF_INET6, &herr); */
+ hp = (struct hostent *)gethostbyaddr((const char *)in, sizeof(*in), AF_INET6);
+ if (hp) {
+ if ((cp = index(hp->h_name, '.')) &&
+ !strcmp(cp + 1, domain))
+ *cp = 0;
+ cp = hp->h_name;
+ freehostent(hp);
+ }
+ }
+ if (cp)
+ (void) strcpy(line, cp);
+ else {
+ (void)inet_ntop(AF_INET6, in, line, sizeof(line));
+ }
+ return (line);
+}
+
+void
+usage()
+{
+ (void)fprintf(stderr,
+"usage: traceroute6 [-dlnrv] [-m max_hops] [-p port#] [-q nqueries]\n\t\
+[-s src_addr] [-g gateway] [-w wait] host [data size]\n");
+ exit(1);
+}
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