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A traceroute applet from vodz. This could probably be slimmed down,
but will do for now...
This commit is contained in:
Eric Andersen
parent
91b84603d3
commit
5c58d283bb
1
Config.h
1
Config.h
@ -114,6 +114,7 @@
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//#define BB_TFTP
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//#define BB_TFTP
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#define BB_TOUCH
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#define BB_TOUCH
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//#define BB_TR
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//#define BB_TR
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//#define BB_TRACEROUTE
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#define BB_TRUE_FALSE
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#define BB_TRUE_FALSE
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#define BB_TTY
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#define BB_TTY
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//#define BB_UNIX2DOS
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//#define BB_UNIX2DOS
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@ -386,6 +386,9 @@
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#ifdef BB_TR
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#ifdef BB_TR
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APPLET(tr, tr_main, _BB_DIR_USR_BIN)
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APPLET(tr, tr_main, _BB_DIR_USR_BIN)
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#endif
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#endif
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#ifdef BB_TRACEROUTE
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APPLET(traceroute, traceroute_main, _BB_DIR_USR_BIN)
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#endif
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#ifdef BB_TRUE_FALSE
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#ifdef BB_TRUE_FALSE
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APPLET(true, true_main, _BB_DIR_BIN)
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APPLET(true, true_main, _BB_DIR_BIN)
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#endif
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#endif
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@ -1593,6 +1593,28 @@
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"$ echo "gdkkn vnqkc" | tr [a-y] [b-z]\n" \
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"$ echo "gdkkn vnqkc" | tr [a-y] [b-z]\n" \
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"hello world\n"
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"hello world\n"
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#define traceroute_trivial_usage \
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"[-dnrv] [-m max_ttl] [-p port#] [-q nqueries]\n\
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[-s src_addr] [-t tos] [-w wait] host [data size]"
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#define traceroute_full_usage \
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"trace the route ip packets follow going to \"host\"\n" \
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"Options:\n" \
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"\t-d\tset SO_DEBUG options to socket\n" \
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"\t-n\tPrint hop addresses numerically rather than symbolically\n" \
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"\t-r\tBypass the normal routing tables and send directly to a host\n" \
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"\t-v\tVerbose output\n" \
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"\t-m max_ttl\tSet the max time-to-live (max number of hops)\n" \
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"\t-p port#\tSet the base UDP port number used in probes\n" \
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"\t\t(default is 33434)\n" \
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"\t-q nqueries\tSet the number of probes per ``ttl'' to nqueries\n" \
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"\t\t(default is 3)\n" \
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"\t-s src_addr\tUse the following IP address as the source address\n" \
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"\t-t tos\tSet the type-of-service in probe packets to the following value\n" \
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"\t\t(default 0)\n" \
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"\t-w wait\tSet the time (in seconds) to wait for a response to a probe\n" \
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"\t\t(default 3 sec.)."
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#define true_trivial_usage \
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#define true_trivial_usage \
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""
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""
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#define true_full_usage \
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#define true_full_usage \
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@ -386,6 +386,9 @@
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#ifdef BB_TR
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#ifdef BB_TR
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APPLET(tr, tr_main, _BB_DIR_USR_BIN)
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APPLET(tr, tr_main, _BB_DIR_USR_BIN)
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#endif
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#endif
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#ifdef BB_TRACEROUTE
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APPLET(traceroute, traceroute_main, _BB_DIR_USR_BIN)
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#endif
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#ifdef BB_TRUE_FALSE
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#ifdef BB_TRUE_FALSE
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APPLET(true, true_main, _BB_DIR_BIN)
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APPLET(true, true_main, _BB_DIR_BIN)
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#endif
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#endif
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@ -1593,6 +1593,28 @@
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"$ echo "gdkkn vnqkc" | tr [a-y] [b-z]\n" \
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"$ echo "gdkkn vnqkc" | tr [a-y] [b-z]\n" \
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"hello world\n"
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"hello world\n"
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#define traceroute_trivial_usage \
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"[-dnrv] [-m max_ttl] [-p port#] [-q nqueries]\n\
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[-s src_addr] [-t tos] [-w wait] host [data size]"
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#define traceroute_full_usage \
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"trace the route ip packets follow going to \"host\"\n" \
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"Options:\n" \
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"\t-d\tset SO_DEBUG options to socket\n" \
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"\t-n\tPrint hop addresses numerically rather than symbolically\n" \
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"\t-r\tBypass the normal routing tables and send directly to a host\n" \
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"\t-v\tVerbose output\n" \
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"\t-m max_ttl\tSet the max time-to-live (max number of hops)\n" \
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"\t-p port#\tSet the base UDP port number used in probes\n" \
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"\t\t(default is 33434)\n" \
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"\t-q nqueries\tSet the number of probes per ``ttl'' to nqueries\n" \
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"\t\t(default is 3)\n" \
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"\t-s src_addr\tUse the following IP address as the source address\n" \
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"\t-t tos\tSet the type-of-service in probe packets to the following value\n" \
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"\t\t(default 0)\n" \
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"\t-w wait\tSet the time (in seconds) to wait for a response to a probe\n" \
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"\t\t(default 3 sec.)."
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#define true_trivial_usage \
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#define true_trivial_usage \
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""
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""
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#define true_full_usage \
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#define true_full_usage \
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593
networking/traceroute.c
Normal file
593
networking/traceroute.c
Normal file
@ -0,0 +1,593 @@
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Van Jacobson.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* traceroute host - trace the route ip packets follow going to "host".
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* Notes
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* -----
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* This program must be run by root or be setuid. (I suggest that
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* you *don't* make it setuid -- casual use could result in a lot
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* of unnecessary traffic on our poor, congested nets.)
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*
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* I stole the idea for this program from Steve Deering. Since
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* the first release, I've learned that had I attended the right
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* IETF working group meetings, I also could have stolen it from Guy
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* Almes or Matt Mathis. I don't know (or care) who came up with
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* the idea first. I envy the originators' perspicacity and I'm
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* glad they didn't keep the idea a secret.
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*
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* Tim Seaver, Ken Adelman and C. Philip Wood provided bug fixes and/or
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* enhancements to the original distribution.
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*
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* I've hacked up a round-trip-route version of this that works by
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* sending a loose-source-routed udp datagram through the destination
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* back to yourself. Unfortunately, SO many gateways botch source
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* routing, the thing is almost worthless. Maybe one day...
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*
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* -- Van Jacobson (van@helios.ee.lbl.gov)
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* Tue Dec 20 03:50:13 PST 1988
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <netdb.h>
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#include <endian.h>
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#include <arpa/inet.h>
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#include <netinet/udp.h>
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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#define MAXPACKET 65535 /* max ip packet size */
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 64
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#endif
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/*
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* format of a (udp) probe packet.
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*/
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struct opacket {
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struct ip ip;
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struct udphdr udp;
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u_char seq; /* sequence number of this packet */
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u_char ttl; /* ttl packet left with */
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struct timeval tv; /* time packet left */
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};
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/*
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* Definitions for internet protocol version 4.
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* Per RFC 791, September 1981.
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*/
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#define IPVERSION 4
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#include "busybox.h"
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static int wait_for_reply (int, struct sockaddr_in *, int);
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static void send_probe (int, int);
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static double deltaT (struct timeval *, struct timeval *);
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static int packet_ok (u_char *, int, struct sockaddr_in *, int);
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static void print (u_char *, int, struct sockaddr_in *);
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static char *inetname (struct in_addr);
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static u_char packet[512]; /* last inbound (icmp) packet */
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static struct opacket *outpacket; /* last output (udp) packet */
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static int s; /* receive (icmp) socket file descriptor */
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static int sndsock; /* send (udp) socket file descriptor */
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static struct sockaddr whereto; /* Who to try to reach */
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static int datalen; /* How much data */
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static char *hostname;
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static int max_ttl = 30;
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static u_short ident;
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static u_short port = 32768+666; /* start udp dest port # for probe packets */
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static int verbose;
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static int waittime = 5; /* time to wait for response (in seconds) */
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static int nflag; /* print addresses numerically */
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int
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#ifndef BB_TRACEROUTE
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main(argc, argv)
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#else
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traceroute_main(argc, argv)
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#endif
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int argc;
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char *argv[];
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{
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extern char *optarg;
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extern int optind;
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struct hostent *hp;
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struct protoent *pe;
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struct sockaddr_in from, *to;
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int ch, i, on, probe, seq, tos, ttl;
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int options = 0; /* socket options */
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char *source = 0;
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int nprobes = 3;
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on = 1;
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seq = tos = 0;
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to = (struct sockaddr_in *)&whereto;
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while ((ch = getopt(argc, argv, "dm:np:q:rs:t:w:v")) != EOF)
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switch(ch) {
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case 'd':
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options |= SO_DEBUG;
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break;
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case 'm':
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max_ttl = atoi(optarg);
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if (max_ttl <= 1)
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error_msg_and_die("max ttl must be >1.");
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break;
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case 'n':
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nflag++;
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break;
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case 'p':
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port = atoi(optarg);
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if (port < 1)
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error_msg_and_die("port must be >0.");
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break;
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case 'q':
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nprobes = atoi(optarg);
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if (nprobes < 1)
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error_msg_and_die("nprobes must be >0.");
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break;
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case 'r':
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options |= SO_DONTROUTE;
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break;
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case 's':
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/*
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* set the ip source address of the outbound
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* probe (e.g., on a multi-homed host).
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*/
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source = optarg;
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break;
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case 't':
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tos = atoi(optarg);
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if (tos < 0 || tos > 255)
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error_msg_and_die("tos must be 0 to 255.");
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break;
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case 'v':
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verbose++;
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break;
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case 'w':
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waittime = atoi(optarg);
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if (waittime <= 1)
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error_msg_and_die("wait must be >1 sec.");
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break;
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default:
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show_usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1)
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show_usage();
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setlinebuf (stdout);
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(void) bzero((char *)&whereto, sizeof(struct sockaddr));
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to->sin_family = AF_INET;
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to->sin_addr.s_addr = inet_addr(*argv);
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if (to->sin_addr.s_addr != -1)
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hostname = *argv;
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else {
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hp = gethostbyname(*argv);
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if (hp) {
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to->sin_family = hp->h_addrtype;
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bcopy(hp->h_addr, (caddr_t)&to->sin_addr, hp->h_length);
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hostname = (char *)hp->h_name;
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} else {
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error_msg_and_die("unknown host %s", *argv);
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}
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}
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if (*++argv)
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datalen = atoi(*argv);
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if (datalen < 0 || datalen >= MAXPACKET - sizeof(struct opacket))
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error_msg_and_die("packet size must be 0 <= s < %d.",
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MAXPACKET - sizeof(struct opacket));
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datalen += sizeof(struct opacket);
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outpacket = (struct opacket *)xmalloc((unsigned)datalen);
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(void) bzero((char *)outpacket, datalen);
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outpacket->ip.ip_dst = to->sin_addr;
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outpacket->ip.ip_tos = tos;
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outpacket->ip.ip_v = IPVERSION;
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outpacket->ip.ip_id = 0;
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ident = (getpid() & 0xffff) | 0x8000;
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if ((pe = getprotobyname("icmp")) == NULL)
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error_msg_and_die("icmp: unknown protocol");
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if ((s = socket(AF_INET, SOCK_RAW, pe->p_proto)) < 0)
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perror_msg_and_die("icmp socket");
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if (options & SO_DEBUG)
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(void) setsockopt(s, SOL_SOCKET, SO_DEBUG,
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(char *)&on, sizeof(on));
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if (options & SO_DONTROUTE)
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(void) setsockopt(s, SOL_SOCKET, SO_DONTROUTE,
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(char *)&on, sizeof(on));
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if ((sndsock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
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perror_msg_and_die("raw socket");
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#ifdef SO_SNDBUF
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if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen,
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sizeof(datalen)) < 0)
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perror_msg_and_die("SO_SNDBUF");
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#endif SO_SNDBUF
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||||||
|
#ifdef IP_HDRINCL
|
||||||
|
if (setsockopt(sndsock, IPPROTO_IP, IP_HDRINCL, (char *)&on,
|
||||||
|
sizeof(on)) < 0)
|
||||||
|
perror_msg_and_die("IP_HDRINCL");
|
||||||
|
#endif IP_HDRINCL
|
||||||
|
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 (source) {
|
||||||
|
(void) bzero((char *)&from, sizeof(struct sockaddr));
|
||||||
|
from.sin_family = AF_INET;
|
||||||
|
from.sin_addr.s_addr = inet_addr(source);
|
||||||
|
if (from.sin_addr.s_addr == -1)
|
||||||
|
error_msg_and_die("unknown host %s", source);
|
||||||
|
outpacket->ip.ip_src = from.sin_addr;
|
||||||
|
#ifndef IP_HDRINCL
|
||||||
|
if (bind(sndsock, (struct sockaddr *)&from, sizeof(from)) < 0)
|
||||||
|
perror_msg_and_die("bind");
|
||||||
|
#endif IP_HDRINCL
|
||||||
|
}
|
||||||
|
|
||||||
|
fprintf(stderr, "traceroute to %s (%s)", hostname,
|
||||||
|
inet_ntoa(to->sin_addr));
|
||||||
|
if (source)
|
||||||
|
fprintf(stderr, " from %s", source);
|
||||||
|
fprintf(stderr, ", %d hops max, %d byte packets\n", max_ttl, datalen);
|
||||||
|
(void) fflush(stderr);
|
||||||
|
|
||||||
|
for (ttl = 1; ttl <= max_ttl; ++ttl) {
|
||||||
|
u_long lastaddr = 0;
|
||||||
|
int got_there = 0;
|
||||||
|
int unreachable = 0;
|
||||||
|
|
||||||
|
printf("%2d ", ttl);
|
||||||
|
for (probe = 0; probe < nprobes; ++probe) {
|
||||||
|
int cc, reset_timer;
|
||||||
|
struct timeval t1, t2;
|
||||||
|
struct timezone tz;
|
||||||
|
struct ip *ip;
|
||||||
|
|
||||||
|
(void) gettimeofday(&t1, &tz);
|
||||||
|
send_probe(++seq, ttl);
|
||||||
|
reset_timer = 1;
|
||||||
|
while ((cc = wait_for_reply(s, &from, reset_timer)) != 0) {
|
||||||
|
(void) gettimeofday(&t2, &tz);
|
||||||
|
if ((i = packet_ok(packet, cc, &from, seq))) {
|
||||||
|
reset_timer = 1;
|
||||||
|
if (from.sin_addr.s_addr != lastaddr) {
|
||||||
|
print(packet, cc, &from);
|
||||||
|
lastaddr = from.sin_addr.s_addr;
|
||||||
|
}
|
||||||
|
printf(" %g ms", deltaT(&t1, &t2));
|
||||||
|
switch(i - 1) {
|
||||||
|
case ICMP_UNREACH_PORT:
|
||||||
|
#ifndef ARCHAIC
|
||||||
|
ip = (struct ip *)packet;
|
||||||
|
if (ip->ip_ttl <= 1)
|
||||||
|
printf(" !");
|
||||||
|
#endif ARCHAIC
|
||||||
|
++got_there;
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_NET:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !N");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_HOST:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !H");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_PROTOCOL:
|
||||||
|
++got_there;
|
||||||
|
printf(" !P");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_NEEDFRAG:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !F");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_SRCFAIL:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !S");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
} else
|
||||||
|
reset_timer = 0;
|
||||||
|
}
|
||||||
|
if (cc == 0)
|
||||||
|
printf(" *");
|
||||||
|
(void) fflush(stdout);
|
||||||
|
}
|
||||||
|
putchar('\n');
|
||||||
|
if (got_there || unreachable >= nprobes-1)
|
||||||
|
exit(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
wait_for_reply(sock, from, reset_timer)
|
||||||
|
int sock;
|
||||||
|
struct sockaddr_in *from;
|
||||||
|
int reset_timer;
|
||||||
|
{
|
||||||
|
fd_set fds;
|
||||||
|
static struct timeval wait;
|
||||||
|
int cc = 0;
|
||||||
|
int fromlen = sizeof (*from);
|
||||||
|
|
||||||
|
FD_ZERO(&fds);
|
||||||
|
FD_SET(sock, &fds);
|
||||||
|
if (reset_timer) {
|
||||||
|
/*
|
||||||
|
* traceroute could hang if someone else has a ping
|
||||||
|
* running and our ICMP reply gets dropped but we don't
|
||||||
|
* realize it because we keep waking up to handle those
|
||||||
|
* other ICMP packets that keep coming in. To fix this,
|
||||||
|
* "reset_timer" will only be true if the last packet that
|
||||||
|
* came in was for us or if this is the first time we're
|
||||||
|
* waiting for a reply since sending out a probe. Note
|
||||||
|
* that this takes advantage of the select() feature on
|
||||||
|
* Linux where the remaining timeout is written to the
|
||||||
|
* struct timeval area.
|
||||||
|
*/
|
||||||
|
wait.tv_sec = waittime;
|
||||||
|
wait.tv_usec = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (select(sock+1, &fds, (fd_set *)0, (fd_set *)0, &wait) > 0)
|
||||||
|
cc=recvfrom(s, (char *)packet, sizeof(packet), 0,
|
||||||
|
(struct sockaddr *)from, &fromlen);
|
||||||
|
|
||||||
|
return(cc);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
send_probe(seq, ttl)
|
||||||
|
int seq, ttl;
|
||||||
|
{
|
||||||
|
struct opacket *op = outpacket;
|
||||||
|
struct ip *ip = &op->ip;
|
||||||
|
struct udphdr *up = &op->udp;
|
||||||
|
int i;
|
||||||
|
struct timezone tz;
|
||||||
|
|
||||||
|
ip->ip_off = 0;
|
||||||
|
ip->ip_hl = sizeof(*ip) >> 2;
|
||||||
|
ip->ip_p = IPPROTO_UDP;
|
||||||
|
ip->ip_len = datalen;
|
||||||
|
ip->ip_ttl = ttl;
|
||||||
|
ip->ip_v = IPVERSION;
|
||||||
|
ip->ip_id = htons(ident+seq);
|
||||||
|
|
||||||
|
up->source = htons(ident);
|
||||||
|
up->dest = htons(port+seq);
|
||||||
|
up->len = htons((u_short)(datalen - sizeof(struct ip)));
|
||||||
|
up->check = 0;
|
||||||
|
|
||||||
|
op->seq = seq;
|
||||||
|
op->ttl = ttl;
|
||||||
|
(void) gettimeofday(&op->tv, &tz);
|
||||||
|
|
||||||
|
i = sendto(sndsock, (char *)outpacket, datalen, 0, &whereto,
|
||||||
|
sizeof(struct sockaddr));
|
||||||
|
if (i < 0 || i != datalen) {
|
||||||
|
if (i<0)
|
||||||
|
perror("sendto");
|
||||||
|
printf("traceroute: wrote %s %d chars, ret=%d\n", hostname,
|
||||||
|
datalen, i);
|
||||||
|
(void) fflush(stdout);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static 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.
|
||||||
|
*/
|
||||||
|
static const char *
|
||||||
|
pr_type(t)
|
||||||
|
u_char t;
|
||||||
|
{
|
||||||
|
static const char * const ttab[] = {
|
||||||
|
"Echo Reply", "ICMP 1", "ICMP 2", "Dest Unreachable",
|
||||||
|
"Source Quench", "Redirect", "ICMP 6", "ICMP 7",
|
||||||
|
"Echo", "ICMP 9", "ICMP 10", "Time Exceeded",
|
||||||
|
"Param Problem", "Timestamp", "Timestamp Reply", "Info Request",
|
||||||
|
"Info Reply"
|
||||||
|
};
|
||||||
|
|
||||||
|
if(t > 16)
|
||||||
|
return("OUT-OF-RANGE");
|
||||||
|
|
||||||
|
return(ttab[t]);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static int
|
||||||
|
packet_ok(buf, cc, from, seq)
|
||||||
|
u_char *buf;
|
||||||
|
int cc;
|
||||||
|
struct sockaddr_in *from;
|
||||||
|
int seq;
|
||||||
|
{
|
||||||
|
register struct icmp *icp;
|
||||||
|
u_char type, code;
|
||||||
|
int hlen;
|
||||||
|
#ifndef ARCHAIC
|
||||||
|
struct ip *ip;
|
||||||
|
|
||||||
|
ip = (struct ip *) buf;
|
||||||
|
hlen = ip->ip_hl << 2;
|
||||||
|
if (cc < hlen + ICMP_MINLEN) {
|
||||||
|
if (verbose)
|
||||||
|
printf("packet too short (%d bytes) from %s\n", cc,
|
||||||
|
inet_ntoa(from->sin_addr));
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
cc -= hlen;
|
||||||
|
icp = (struct icmp *)(buf + hlen);
|
||||||
|
#else
|
||||||
|
icp = (struct icmp *)buf;
|
||||||
|
#endif ARCHAIC
|
||||||
|
type = icp->icmp_type; code = icp->icmp_code;
|
||||||
|
if ((type == ICMP_TIMXCEED && code == ICMP_TIMXCEED_INTRANS) ||
|
||||||
|
type == ICMP_UNREACH) {
|
||||||
|
struct ip *hip;
|
||||||
|
struct udphdr *up;
|
||||||
|
|
||||||
|
hip = &icp->icmp_ip;
|
||||||
|
hlen = hip->ip_hl << 2;
|
||||||
|
up = (struct udphdr *)((u_char *)hip + hlen);
|
||||||
|
if (hlen + 12 <= cc && hip->ip_p == IPPROTO_UDP &&
|
||||||
|
up->source == htons(ident) &&
|
||||||
|
up->dest == htons(port+seq))
|
||||||
|
return (type == ICMP_TIMXCEED? -1 : code+1);
|
||||||
|
}
|
||||||
|
#ifndef ARCHAIC
|
||||||
|
if (verbose) {
|
||||||
|
int i;
|
||||||
|
u_long *lp = (u_long *)&icp->icmp_ip;
|
||||||
|
|
||||||
|
printf("\n%d bytes from %s to %s", cc,
|
||||||
|
inet_ntoa(from->sin_addr), inet_ntoa(ip->ip_dst));
|
||||||
|
printf(": icmp type %d (%s) code %d\n", type, pr_type(type),
|
||||||
|
icp->icmp_code);
|
||||||
|
for (i = 4; i < cc ; i += sizeof(long))
|
||||||
|
printf("%2d: x%8.8lx\n", i, *lp++);
|
||||||
|
}
|
||||||
|
#endif ARCHAIC
|
||||||
|
return(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
print(buf, cc, from)
|
||||||
|
u_char *buf;
|
||||||
|
int cc;
|
||||||
|
struct sockaddr_in *from;
|
||||||
|
{
|
||||||
|
struct ip *ip;
|
||||||
|
int hlen;
|
||||||
|
|
||||||
|
ip = (struct ip *) buf;
|
||||||
|
hlen = ip->ip_hl << 2;
|
||||||
|
cc -= hlen;
|
||||||
|
|
||||||
|
if (nflag)
|
||||||
|
printf(" %s", inet_ntoa(from->sin_addr));
|
||||||
|
else
|
||||||
|
printf(" %s (%s)", inetname(from->sin_addr),
|
||||||
|
inet_ntoa(from->sin_addr));
|
||||||
|
|
||||||
|
if (verbose)
|
||||||
|
printf (" %d bytes to %s", cc, inet_ntoa (ip->ip_dst));
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Construct an Internet address representation.
|
||||||
|
* If the nflag has been supplied, give
|
||||||
|
* numeric value, otherwise try for symbolic name.
|
||||||
|
*/
|
||||||
|
static char *
|
||||||
|
inetname(in)
|
||||||
|
struct in_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 && in.s_addr != INADDR_ANY) {
|
||||||
|
hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
|
||||||
|
if (hp) {
|
||||||
|
if ((cp = index(hp->h_name, '.')) &&
|
||||||
|
!strcmp(cp + 1, domain))
|
||||||
|
*cp = 0;
|
||||||
|
cp = (char *)hp->h_name;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (cp)
|
||||||
|
(void) strcpy(line, cp);
|
||||||
|
else {
|
||||||
|
in.s_addr = ntohl(in.s_addr);
|
||||||
|
#define C(x) ((x) & 0xff)
|
||||||
|
sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
|
||||||
|
C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
|
||||||
|
}
|
||||||
|
return (line);
|
||||||
|
}
|
||||||
593
traceroute.c
Normal file
593
traceroute.c
Normal file
@ -0,0 +1,593 @@
|
|||||||
|
/*-
|
||||||
|
* 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* traceroute host - trace the route ip packets follow going to "host".
|
||||||
|
* 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.)
|
||||||
|
*
|
||||||
|
* 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 <stdio.h>
|
||||||
|
#include <errno.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
#include <unistd.h>
|
||||||
|
#include <sys/time.h>
|
||||||
|
#include <netdb.h>
|
||||||
|
#include <endian.h>
|
||||||
|
#include <arpa/inet.h>
|
||||||
|
#include <netinet/udp.h>
|
||||||
|
#include <netinet/ip.h>
|
||||||
|
#include <netinet/ip_icmp.h>
|
||||||
|
|
||||||
|
|
||||||
|
#define MAXPACKET 65535 /* max ip packet size */
|
||||||
|
#ifndef MAXHOSTNAMELEN
|
||||||
|
#define MAXHOSTNAMELEN 64
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/*
|
||||||
|
* format of a (udp) probe packet.
|
||||||
|
*/
|
||||||
|
struct opacket {
|
||||||
|
struct ip ip;
|
||||||
|
struct udphdr udp;
|
||||||
|
u_char seq; /* sequence number of this packet */
|
||||||
|
u_char ttl; /* ttl packet left with */
|
||||||
|
struct timeval tv; /* time packet left */
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Definitions for internet protocol version 4.
|
||||||
|
* Per RFC 791, September 1981.
|
||||||
|
*/
|
||||||
|
#define IPVERSION 4
|
||||||
|
|
||||||
|
|
||||||
|
#include "busybox.h"
|
||||||
|
|
||||||
|
static int wait_for_reply (int, struct sockaddr_in *, int);
|
||||||
|
static void send_probe (int, int);
|
||||||
|
static double deltaT (struct timeval *, struct timeval *);
|
||||||
|
static int packet_ok (u_char *, int, struct sockaddr_in *, int);
|
||||||
|
static void print (u_char *, int, struct sockaddr_in *);
|
||||||
|
static char *inetname (struct in_addr);
|
||||||
|
|
||||||
|
static u_char packet[512]; /* last inbound (icmp) packet */
|
||||||
|
static struct opacket *outpacket; /* last output (udp) packet */
|
||||||
|
|
||||||
|
static int s; /* receive (icmp) socket file descriptor */
|
||||||
|
static int sndsock; /* send (udp) socket file descriptor */
|
||||||
|
|
||||||
|
static struct sockaddr whereto; /* Who to try to reach */
|
||||||
|
static int datalen; /* How much data */
|
||||||
|
|
||||||
|
static char *hostname;
|
||||||
|
|
||||||
|
static int max_ttl = 30;
|
||||||
|
static u_short ident;
|
||||||
|
static u_short port = 32768+666; /* start udp dest port # for probe packets */
|
||||||
|
|
||||||
|
static int verbose;
|
||||||
|
static int waittime = 5; /* time to wait for response (in seconds) */
|
||||||
|
static int nflag; /* print addresses numerically */
|
||||||
|
|
||||||
|
int
|
||||||
|
#ifndef BB_TRACEROUTE
|
||||||
|
main(argc, argv)
|
||||||
|
#else
|
||||||
|
traceroute_main(argc, argv)
|
||||||
|
#endif
|
||||||
|
int argc;
|
||||||
|
char *argv[];
|
||||||
|
{
|
||||||
|
extern char *optarg;
|
||||||
|
extern int optind;
|
||||||
|
struct hostent *hp;
|
||||||
|
struct protoent *pe;
|
||||||
|
struct sockaddr_in from, *to;
|
||||||
|
int ch, i, on, probe, seq, tos, ttl;
|
||||||
|
|
||||||
|
int options = 0; /* socket options */
|
||||||
|
char *source = 0;
|
||||||
|
int nprobes = 3;
|
||||||
|
|
||||||
|
on = 1;
|
||||||
|
seq = tos = 0;
|
||||||
|
to = (struct sockaddr_in *)&whereto;
|
||||||
|
while ((ch = getopt(argc, argv, "dm:np:q:rs:t:w:v")) != EOF)
|
||||||
|
switch(ch) {
|
||||||
|
case 'd':
|
||||||
|
options |= SO_DEBUG;
|
||||||
|
break;
|
||||||
|
case 'm':
|
||||||
|
max_ttl = atoi(optarg);
|
||||||
|
if (max_ttl <= 1)
|
||||||
|
error_msg_and_die("max ttl must be >1.");
|
||||||
|
break;
|
||||||
|
case 'n':
|
||||||
|
nflag++;
|
||||||
|
break;
|
||||||
|
case 'p':
|
||||||
|
port = atoi(optarg);
|
||||||
|
if (port < 1)
|
||||||
|
error_msg_and_die("port must be >0.");
|
||||||
|
break;
|
||||||
|
case 'q':
|
||||||
|
nprobes = atoi(optarg);
|
||||||
|
if (nprobes < 1)
|
||||||
|
error_msg_and_die("nprobes must be >0.");
|
||||||
|
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 't':
|
||||||
|
tos = atoi(optarg);
|
||||||
|
if (tos < 0 || tos > 255)
|
||||||
|
error_msg_and_die("tos must be 0 to 255.");
|
||||||
|
break;
|
||||||
|
case 'v':
|
||||||
|
verbose++;
|
||||||
|
break;
|
||||||
|
case 'w':
|
||||||
|
waittime = atoi(optarg);
|
||||||
|
if (waittime <= 1)
|
||||||
|
error_msg_and_die("wait must be >1 sec.");
|
||||||
|
break;
|
||||||
|
default:
|
||||||
|
show_usage();
|
||||||
|
}
|
||||||
|
argc -= optind;
|
||||||
|
argv += optind;
|
||||||
|
|
||||||
|
if (argc < 1)
|
||||||
|
show_usage();
|
||||||
|
|
||||||
|
setlinebuf (stdout);
|
||||||
|
|
||||||
|
(void) bzero((char *)&whereto, sizeof(struct sockaddr));
|
||||||
|
to->sin_family = AF_INET;
|
||||||
|
to->sin_addr.s_addr = inet_addr(*argv);
|
||||||
|
if (to->sin_addr.s_addr != -1)
|
||||||
|
hostname = *argv;
|
||||||
|
else {
|
||||||
|
hp = gethostbyname(*argv);
|
||||||
|
if (hp) {
|
||||||
|
to->sin_family = hp->h_addrtype;
|
||||||
|
bcopy(hp->h_addr, (caddr_t)&to->sin_addr, hp->h_length);
|
||||||
|
hostname = (char *)hp->h_name;
|
||||||
|
} else {
|
||||||
|
error_msg_and_die("unknown host %s", *argv);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (*++argv)
|
||||||
|
datalen = atoi(*argv);
|
||||||
|
if (datalen < 0 || datalen >= MAXPACKET - sizeof(struct opacket))
|
||||||
|
error_msg_and_die("packet size must be 0 <= s < %d.",
|
||||||
|
MAXPACKET - sizeof(struct opacket));
|
||||||
|
datalen += sizeof(struct opacket);
|
||||||
|
outpacket = (struct opacket *)xmalloc((unsigned)datalen);
|
||||||
|
(void) bzero((char *)outpacket, datalen);
|
||||||
|
outpacket->ip.ip_dst = to->sin_addr;
|
||||||
|
outpacket->ip.ip_tos = tos;
|
||||||
|
outpacket->ip.ip_v = IPVERSION;
|
||||||
|
outpacket->ip.ip_id = 0;
|
||||||
|
|
||||||
|
ident = (getpid() & 0xffff) | 0x8000;
|
||||||
|
|
||||||
|
if ((pe = getprotobyname("icmp")) == NULL)
|
||||||
|
error_msg_and_die("icmp: unknown protocol");
|
||||||
|
if ((s = socket(AF_INET, SOCK_RAW, pe->p_proto)) < 0)
|
||||||
|
perror_msg_and_die("icmp socket");
|
||||||
|
if (options & SO_DEBUG)
|
||||||
|
(void) setsockopt(s, SOL_SOCKET, SO_DEBUG,
|
||||||
|
(char *)&on, sizeof(on));
|
||||||
|
if (options & SO_DONTROUTE)
|
||||||
|
(void) setsockopt(s, SOL_SOCKET, SO_DONTROUTE,
|
||||||
|
(char *)&on, sizeof(on));
|
||||||
|
|
||||||
|
if ((sndsock = socket(AF_INET, SOCK_RAW, IPPROTO_RAW)) < 0)
|
||||||
|
perror_msg_and_die("raw socket");
|
||||||
|
#ifdef SO_SNDBUF
|
||||||
|
if (setsockopt(sndsock, SOL_SOCKET, SO_SNDBUF, (char *)&datalen,
|
||||||
|
sizeof(datalen)) < 0)
|
||||||
|
perror_msg_and_die("SO_SNDBUF");
|
||||||
|
#endif SO_SNDBUF
|
||||||
|
#ifdef IP_HDRINCL
|
||||||
|
if (setsockopt(sndsock, IPPROTO_IP, IP_HDRINCL, (char *)&on,
|
||||||
|
sizeof(on)) < 0)
|
||||||
|
perror_msg_and_die("IP_HDRINCL");
|
||||||
|
#endif IP_HDRINCL
|
||||||
|
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 (source) {
|
||||||
|
(void) bzero((char *)&from, sizeof(struct sockaddr));
|
||||||
|
from.sin_family = AF_INET;
|
||||||
|
from.sin_addr.s_addr = inet_addr(source);
|
||||||
|
if (from.sin_addr.s_addr == -1)
|
||||||
|
error_msg_and_die("unknown host %s", source);
|
||||||
|
outpacket->ip.ip_src = from.sin_addr;
|
||||||
|
#ifndef IP_HDRINCL
|
||||||
|
if (bind(sndsock, (struct sockaddr *)&from, sizeof(from)) < 0)
|
||||||
|
perror_msg_and_die("bind");
|
||||||
|
#endif IP_HDRINCL
|
||||||
|
}
|
||||||
|
|
||||||
|
fprintf(stderr, "traceroute to %s (%s)", hostname,
|
||||||
|
inet_ntoa(to->sin_addr));
|
||||||
|
if (source)
|
||||||
|
fprintf(stderr, " from %s", source);
|
||||||
|
fprintf(stderr, ", %d hops max, %d byte packets\n", max_ttl, datalen);
|
||||||
|
(void) fflush(stderr);
|
||||||
|
|
||||||
|
for (ttl = 1; ttl <= max_ttl; ++ttl) {
|
||||||
|
u_long lastaddr = 0;
|
||||||
|
int got_there = 0;
|
||||||
|
int unreachable = 0;
|
||||||
|
|
||||||
|
printf("%2d ", ttl);
|
||||||
|
for (probe = 0; probe < nprobes; ++probe) {
|
||||||
|
int cc, reset_timer;
|
||||||
|
struct timeval t1, t2;
|
||||||
|
struct timezone tz;
|
||||||
|
struct ip *ip;
|
||||||
|
|
||||||
|
(void) gettimeofday(&t1, &tz);
|
||||||
|
send_probe(++seq, ttl);
|
||||||
|
reset_timer = 1;
|
||||||
|
while ((cc = wait_for_reply(s, &from, reset_timer)) != 0) {
|
||||||
|
(void) gettimeofday(&t2, &tz);
|
||||||
|
if ((i = packet_ok(packet, cc, &from, seq))) {
|
||||||
|
reset_timer = 1;
|
||||||
|
if (from.sin_addr.s_addr != lastaddr) {
|
||||||
|
print(packet, cc, &from);
|
||||||
|
lastaddr = from.sin_addr.s_addr;
|
||||||
|
}
|
||||||
|
printf(" %g ms", deltaT(&t1, &t2));
|
||||||
|
switch(i - 1) {
|
||||||
|
case ICMP_UNREACH_PORT:
|
||||||
|
#ifndef ARCHAIC
|
||||||
|
ip = (struct ip *)packet;
|
||||||
|
if (ip->ip_ttl <= 1)
|
||||||
|
printf(" !");
|
||||||
|
#endif ARCHAIC
|
||||||
|
++got_there;
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_NET:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !N");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_HOST:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !H");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_PROTOCOL:
|
||||||
|
++got_there;
|
||||||
|
printf(" !P");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_NEEDFRAG:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !F");
|
||||||
|
break;
|
||||||
|
case ICMP_UNREACH_SRCFAIL:
|
||||||
|
++unreachable;
|
||||||
|
printf(" !S");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
} else
|
||||||
|
reset_timer = 0;
|
||||||
|
}
|
||||||
|
if (cc == 0)
|
||||||
|
printf(" *");
|
||||||
|
(void) fflush(stdout);
|
||||||
|
}
|
||||||
|
putchar('\n');
|
||||||
|
if (got_there || unreachable >= nprobes-1)
|
||||||
|
exit(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
wait_for_reply(sock, from, reset_timer)
|
||||||
|
int sock;
|
||||||
|
struct sockaddr_in *from;
|
||||||
|
int reset_timer;
|
||||||
|
{
|
||||||
|
fd_set fds;
|
||||||
|
static struct timeval wait;
|
||||||
|
int cc = 0;
|
||||||
|
int fromlen = sizeof (*from);
|
||||||
|
|
||||||
|
FD_ZERO(&fds);
|
||||||
|
FD_SET(sock, &fds);
|
||||||
|
if (reset_timer) {
|
||||||
|
/*
|
||||||
|
* traceroute could hang if someone else has a ping
|
||||||
|
* running and our ICMP reply gets dropped but we don't
|
||||||
|
* realize it because we keep waking up to handle those
|
||||||
|
* other ICMP packets that keep coming in. To fix this,
|
||||||
|
* "reset_timer" will only be true if the last packet that
|
||||||
|
* came in was for us or if this is the first time we're
|
||||||
|
* waiting for a reply since sending out a probe. Note
|
||||||
|
* that this takes advantage of the select() feature on
|
||||||
|
* Linux where the remaining timeout is written to the
|
||||||
|
* struct timeval area.
|
||||||
|
*/
|
||||||
|
wait.tv_sec = waittime;
|
||||||
|
wait.tv_usec = 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (select(sock+1, &fds, (fd_set *)0, (fd_set *)0, &wait) > 0)
|
||||||
|
cc=recvfrom(s, (char *)packet, sizeof(packet), 0,
|
||||||
|
(struct sockaddr *)from, &fromlen);
|
||||||
|
|
||||||
|
return(cc);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
send_probe(seq, ttl)
|
||||||
|
int seq, ttl;
|
||||||
|
{
|
||||||
|
struct opacket *op = outpacket;
|
||||||
|
struct ip *ip = &op->ip;
|
||||||
|
struct udphdr *up = &op->udp;
|
||||||
|
int i;
|
||||||
|
struct timezone tz;
|
||||||
|
|
||||||
|
ip->ip_off = 0;
|
||||||
|
ip->ip_hl = sizeof(*ip) >> 2;
|
||||||
|
ip->ip_p = IPPROTO_UDP;
|
||||||
|
ip->ip_len = datalen;
|
||||||
|
ip->ip_ttl = ttl;
|
||||||
|
ip->ip_v = IPVERSION;
|
||||||
|
ip->ip_id = htons(ident+seq);
|
||||||
|
|
||||||
|
up->source = htons(ident);
|
||||||
|
up->dest = htons(port+seq);
|
||||||
|
up->len = htons((u_short)(datalen - sizeof(struct ip)));
|
||||||
|
up->check = 0;
|
||||||
|
|
||||||
|
op->seq = seq;
|
||||||
|
op->ttl = ttl;
|
||||||
|
(void) gettimeofday(&op->tv, &tz);
|
||||||
|
|
||||||
|
i = sendto(sndsock, (char *)outpacket, datalen, 0, &whereto,
|
||||||
|
sizeof(struct sockaddr));
|
||||||
|
if (i < 0 || i != datalen) {
|
||||||
|
if (i<0)
|
||||||
|
perror("sendto");
|
||||||
|
printf("traceroute: wrote %s %d chars, ret=%d\n", hostname,
|
||||||
|
datalen, i);
|
||||||
|
(void) fflush(stdout);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static 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.
|
||||||
|
*/
|
||||||
|
static const char *
|
||||||
|
pr_type(t)
|
||||||
|
u_char t;
|
||||||
|
{
|
||||||
|
static const char * const ttab[] = {
|
||||||
|
"Echo Reply", "ICMP 1", "ICMP 2", "Dest Unreachable",
|
||||||
|
"Source Quench", "Redirect", "ICMP 6", "ICMP 7",
|
||||||
|
"Echo", "ICMP 9", "ICMP 10", "Time Exceeded",
|
||||||
|
"Param Problem", "Timestamp", "Timestamp Reply", "Info Request",
|
||||||
|
"Info Reply"
|
||||||
|
};
|
||||||
|
|
||||||
|
if(t > 16)
|
||||||
|
return("OUT-OF-RANGE");
|
||||||
|
|
||||||
|
return(ttab[t]);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static int
|
||||||
|
packet_ok(buf, cc, from, seq)
|
||||||
|
u_char *buf;
|
||||||
|
int cc;
|
||||||
|
struct sockaddr_in *from;
|
||||||
|
int seq;
|
||||||
|
{
|
||||||
|
register struct icmp *icp;
|
||||||
|
u_char type, code;
|
||||||
|
int hlen;
|
||||||
|
#ifndef ARCHAIC
|
||||||
|
struct ip *ip;
|
||||||
|
|
||||||
|
ip = (struct ip *) buf;
|
||||||
|
hlen = ip->ip_hl << 2;
|
||||||
|
if (cc < hlen + ICMP_MINLEN) {
|
||||||
|
if (verbose)
|
||||||
|
printf("packet too short (%d bytes) from %s\n", cc,
|
||||||
|
inet_ntoa(from->sin_addr));
|
||||||
|
return (0);
|
||||||
|
}
|
||||||
|
cc -= hlen;
|
||||||
|
icp = (struct icmp *)(buf + hlen);
|
||||||
|
#else
|
||||||
|
icp = (struct icmp *)buf;
|
||||||
|
#endif ARCHAIC
|
||||||
|
type = icp->icmp_type; code = icp->icmp_code;
|
||||||
|
if ((type == ICMP_TIMXCEED && code == ICMP_TIMXCEED_INTRANS) ||
|
||||||
|
type == ICMP_UNREACH) {
|
||||||
|
struct ip *hip;
|
||||||
|
struct udphdr *up;
|
||||||
|
|
||||||
|
hip = &icp->icmp_ip;
|
||||||
|
hlen = hip->ip_hl << 2;
|
||||||
|
up = (struct udphdr *)((u_char *)hip + hlen);
|
||||||
|
if (hlen + 12 <= cc && hip->ip_p == IPPROTO_UDP &&
|
||||||
|
up->source == htons(ident) &&
|
||||||
|
up->dest == htons(port+seq))
|
||||||
|
return (type == ICMP_TIMXCEED? -1 : code+1);
|
||||||
|
}
|
||||||
|
#ifndef ARCHAIC
|
||||||
|
if (verbose) {
|
||||||
|
int i;
|
||||||
|
u_long *lp = (u_long *)&icp->icmp_ip;
|
||||||
|
|
||||||
|
printf("\n%d bytes from %s to %s", cc,
|
||||||
|
inet_ntoa(from->sin_addr), inet_ntoa(ip->ip_dst));
|
||||||
|
printf(": icmp type %d (%s) code %d\n", type, pr_type(type),
|
||||||
|
icp->icmp_code);
|
||||||
|
for (i = 4; i < cc ; i += sizeof(long))
|
||||||
|
printf("%2d: x%8.8lx\n", i, *lp++);
|
||||||
|
}
|
||||||
|
#endif ARCHAIC
|
||||||
|
return(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
static void
|
||||||
|
print(buf, cc, from)
|
||||||
|
u_char *buf;
|
||||||
|
int cc;
|
||||||
|
struct sockaddr_in *from;
|
||||||
|
{
|
||||||
|
struct ip *ip;
|
||||||
|
int hlen;
|
||||||
|
|
||||||
|
ip = (struct ip *) buf;
|
||||||
|
hlen = ip->ip_hl << 2;
|
||||||
|
cc -= hlen;
|
||||||
|
|
||||||
|
if (nflag)
|
||||||
|
printf(" %s", inet_ntoa(from->sin_addr));
|
||||||
|
else
|
||||||
|
printf(" %s (%s)", inetname(from->sin_addr),
|
||||||
|
inet_ntoa(from->sin_addr));
|
||||||
|
|
||||||
|
if (verbose)
|
||||||
|
printf (" %d bytes to %s", cc, inet_ntoa (ip->ip_dst));
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Construct an Internet address representation.
|
||||||
|
* If the nflag has been supplied, give
|
||||||
|
* numeric value, otherwise try for symbolic name.
|
||||||
|
*/
|
||||||
|
static char *
|
||||||
|
inetname(in)
|
||||||
|
struct in_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 && in.s_addr != INADDR_ANY) {
|
||||||
|
hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
|
||||||
|
if (hp) {
|
||||||
|
if ((cp = index(hp->h_name, '.')) &&
|
||||||
|
!strcmp(cp + 1, domain))
|
||||||
|
*cp = 0;
|
||||||
|
cp = (char *)hp->h_name;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (cp)
|
||||||
|
(void) strcpy(line, cp);
|
||||||
|
else {
|
||||||
|
in.s_addr = ntohl(in.s_addr);
|
||||||
|
#define C(x) ((x) & 0xff)
|
||||||
|
sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
|
||||||
|
C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
|
||||||
|
}
|
||||||
|
return (line);
|
||||||
|
}
|
||||||
22
usage.h
22
usage.h
@ -1593,6 +1593,28 @@
|
|||||||
"$ echo "gdkkn vnqkc" | tr [a-y] [b-z]\n" \
|
"$ echo "gdkkn vnqkc" | tr [a-y] [b-z]\n" \
|
||||||
"hello world\n"
|
"hello world\n"
|
||||||
|
|
||||||
|
#define traceroute_trivial_usage \
|
||||||
|
"[-dnrv] [-m max_ttl] [-p port#] [-q nqueries]\n\
|
||||||
|
[-s src_addr] [-t tos] [-w wait] host [data size]"
|
||||||
|
#define traceroute_full_usage \
|
||||||
|
"trace the route ip packets follow going to \"host\"\n" \
|
||||||
|
"Options:\n" \
|
||||||
|
"\t-d\tset SO_DEBUG options to socket\n" \
|
||||||
|
"\t-n\tPrint hop addresses numerically rather than symbolically\n" \
|
||||||
|
"\t-r\tBypass the normal routing tables and send directly to a host\n" \
|
||||||
|
"\t-v\tVerbose output\n" \
|
||||||
|
"\t-m max_ttl\tSet the max time-to-live (max number of hops)\n" \
|
||||||
|
"\t-p port#\tSet the base UDP port number used in probes\n" \
|
||||||
|
"\t\t(default is 33434)\n" \
|
||||||
|
"\t-q nqueries\tSet the number of probes per ``ttl'' to nqueries\n" \
|
||||||
|
"\t\t(default is 3)\n" \
|
||||||
|
"\t-s src_addr\tUse the following IP address as the source address\n" \
|
||||||
|
"\t-t tos\tSet the type-of-service in probe packets to the following value\n" \
|
||||||
|
"\t\t(default 0)\n" \
|
||||||
|
"\t-w wait\tSet the time (in seconds) to wait for a response to a probe\n" \
|
||||||
|
"\t\t(default 3 sec.)."
|
||||||
|
|
||||||
|
|
||||||
#define true_trivial_usage \
|
#define true_trivial_usage \
|
||||||
""
|
""
|
||||||
#define true_full_usage \
|
#define true_full_usage \
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user