Add AS lookup functionality. On each hop we query a whois server to
find the corresponding AS for that IP (-a switch). We can also choose a different whois server with the -A switch. The default is whois.radb.net. Obtained from: NetBSD Reviewed by: bms, njl (mentor) Approved by: njl (mentor)
This commit is contained in:
Rui Paulo
parent
6f540420dd
commit
8ea0d8cff1
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=176428
242
contrib/traceroute/as.c
Normal file
242
contrib/traceroute/as.c
Normal file
@ -0,0 +1,242 @@
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/* $FreeBSD$ */
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/* $NetBSD: as.c,v 1.1 2001/11/04 23:14:36 atatat Exp $ */
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/*
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Brown.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <err.h>
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#include <stdio.h>
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#include "as.h"
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#define DEFAULT_AS_SERVER "whois.radb.net"
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#undef AS_DEBUG_FILE
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struct aslookup {
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FILE *as_f;
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#ifdef AS_DEBUG_FILE
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FILE *as_debug;
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#endif /* AS_DEBUG_FILE */
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};
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void *
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as_setup(server)
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char *server;
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{
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struct aslookup *asn;
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struct hostent *he = NULL;
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struct servent *se;
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struct sockaddr_in in;
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FILE *f;
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int s;
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if (server == NULL)
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server = DEFAULT_AS_SERVER;
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(void)memset(&in, 0, sizeof(in));
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in.sin_family = AF_INET;
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in.sin_len = sizeof(in);
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if ((se = getservbyname("whois", "tcp")) == NULL) {
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warnx("warning: whois/tcp service not found");
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in.sin_port = ntohs(43);
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} else
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in.sin_port = se->s_port;
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if (inet_aton(server, &in.sin_addr) == 0 &&
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((he = gethostbyname(server)) == NULL ||
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he->h_addr == NULL)) {
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warnx("%s: %s", server, hstrerror(h_errno));
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return (NULL);
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}
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if ((s = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
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warn("socket");
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return (NULL);
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}
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do {
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if (he != NULL) {
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memcpy(&in.sin_addr, he->h_addr, he->h_length);
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he->h_addr_list++;
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}
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if (connect(s, (struct sockaddr *)&in, sizeof(in)) == 0)
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break;
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if (he == NULL || he->h_addr == NULL) {
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close(s);
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s = -1;
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break;
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}
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} while (1);
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if (s == -1) {
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warn("connect");
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return (NULL);
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}
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f = fdopen(s, "r+");
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(void)fprintf(f, "!!\n");
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(void)fflush(f);
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asn = malloc(sizeof(struct aslookup));
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if (asn == NULL)
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(void)fclose(f);
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else
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asn->as_f = f;
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#ifdef AS_DEBUG_FILE
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asn->as_debug = fopen(AS_DEBUG_FILE, "w");
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, ">> !!\n");
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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return (asn);
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}
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int
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as_lookup(_asn, addr)
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void *_asn;
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struct in_addr *addr;
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{
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struct aslookup *asn = _asn;
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char buf[1024];
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int as, rc, dlen;
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as = rc = dlen = 0;
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(void)fprintf(asn->as_f, "!r%s/32,l\n", inet_ntoa(*addr));
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(void)fflush(asn->as_f);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, ">> !r%s/32,l\n",
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inet_ntoa(*addr));
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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while (fgets(buf, sizeof(buf), asn->as_f) != NULL) {
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buf[sizeof(buf) - 1] = '\0';
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, "<< %s", buf);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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if (rc == 0) {
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rc = buf[0];
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switch (rc) {
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case 'A':
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/* A - followed by # bytes of answer */
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sscanf(buf, "A%d\n", &dlen);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug,
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"dlen: %d\n", dlen);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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break;
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case 'C':
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case 'D':
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case 'E':
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case 'F':
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/* C - no data returned */
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/* D - key not found */
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/* E - multiple copies of key */
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/* F - some other error */
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break;
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}
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if (rc == 'A')
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/* skip to next input line */
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continue;
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}
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if (dlen == 0)
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/* out of data, next char read is end code */
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rc = buf[0];
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if (rc != 'A')
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/* either an error off the bat, or a done code */
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break;
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/* data received, thank you */
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dlen -= strlen(buf);
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/* origin line is the interesting bit */
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if (as == 0 && strncasecmp(buf, "origin:", 7) == 0) {
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sscanf(buf + 7, " AS%d", &as);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, "as: %d\n", as);
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(void)fflush(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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}
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}
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return (as);
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}
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void
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as_shutdown(_asn)
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void *_asn;
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{
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struct aslookup *asn = _asn;
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(void)fprintf(asn->as_f, "!q\n");
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(void)fclose(asn->as_f);
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#ifdef AS_DEBUG_FILE
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if (asn->as_debug) {
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(void)fprintf(asn->as_debug, ">> !q\n");
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(void)fclose(asn->as_debug);
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}
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#endif /* AS_DEBUG_FILE */
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free(asn);
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}
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42
contrib/traceroute/as.h
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42
contrib/traceroute/as.h
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@ -0,0 +1,42 @@
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/* $FreeBSD$ */
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/* $NetBSD: as.h,v 1.1 2001/11/04 23:14:36 atatat Exp $ */
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/*
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Brown.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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void *as_setup __P((char *));
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int as_lookup __P((void *, struct in_addr *));
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void as_shutdown __P((void *));
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@ -16,7 +16,7 @@
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.\" $Id: traceroute.8,v 1.19 2000/09/21 08:44:19 leres Exp $
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.\" $FreeBSD$
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.\"
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.TH TRACEROUTE 8 "21 September 2000"
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.TH TRACEROUTE 8 "19 February 2008"
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.UC 6
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.SH NAME
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traceroute \- print the route packets take to network host
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@ -24,7 +24,7 @@ traceroute \- print the route packets take to network host
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.na
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.B traceroute
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[
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.B \-dDeFISnrvx
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.B \-adDeFISnrvx
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] [
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.B \-f
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.I first_ttl
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@ -71,6 +71,9 @@ traceroute \- print the route packets take to network host
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.B \-w
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.I waittime
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] [
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.B \-A
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.I as_server
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] [
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.B \-z
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.I pausemsecs
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]
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@ -98,6 +101,13 @@ name.
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.PP
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Other options are:
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.TP
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.B \-a
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Turn on AS# lookups for each hop encountered.
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.TP
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.B -A
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Turn on AS# lookups and use the given server instead of the
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default.
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.TP
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.B \-e
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Firewall evasion mode.
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Use fixed destination ports for UDP and TCP probes.
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@ -443,3 +453,7 @@ should listen for a RST from the destination host (or an intermediate
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router that's filtering packets), but this is not implemented yet.
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.PP
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Please send bug reports to traceroute@ee.lbl.gov.
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.PP
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The AS number capability reports information that may sometimes be
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inaccurate due to discrepancies between the contents of the
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routing database server and the current state of the Internet.
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@ -263,6 +263,7 @@ static const char rcsid[] =
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#include "findsaddr.h"
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#include "ifaddrlist.h"
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#include "as.h"
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#include "traceroute.h"
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/* Maximum number of gateways (include room for one noop) */
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@ -350,6 +351,9 @@ int options; /* socket options */
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int verbose;
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int waittime = 5; /* time to wait for response (in seconds) */
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int nflag; /* print addresses numerically */
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int as_path; /* print as numbers for each hop */
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char *as_server = NULL;
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void *asn;
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#ifdef CANT_HACK_IPCKSUM
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int doipcksum = 0; /* don't calculate ip checksums by default */
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#else
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@ -535,9 +539,17 @@ main(int argc, char **argv)
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prog = argv[0];
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opterr = 0;
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while ((op = getopt(argc, argv, "edDFInrSvxf:g:i:M:m:P:p:q:s:t:w:z:")) != EOF)
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while ((op = getopt(argc, argv, "aA:edDFInrSvxf:g:i:M:m:P:p:q:s:t:w:z:")) != EOF)
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switch (op) {
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case 'a':
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as_path = 1;
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break;
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case 'A':
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as_path = 1;
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as_server = optarg;
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break;
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case 'd':
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options |= SO_DEBUG;
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break;
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@ -913,6 +925,16 @@ main(int argc, char **argv)
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exit (1);
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}
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if (as_path) {
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asn = as_setup(as_server);
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if (asn == NULL) {
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Fprintf(stderr, "%s: as_setup failed, AS# lookups"
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" disabled\n", prog);
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(void)fflush(stderr);
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as_path = 0;
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}
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}
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#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
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if (setpolicy(sndsock, "in bypass") < 0)
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errx(1, "%s", ipsec_strerror());
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@ -1118,6 +1140,8 @@ main(int argc, char **argv)
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(unreachable > 0 && unreachable >= nprobes - 1))
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break;
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}
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if (as_path)
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as_shutdown(asn);
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exit(0);
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}
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@ -1458,6 +1482,9 @@ print(register u_char *buf, register int cc, register struct sockaddr_in *from)
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hlen = ip->ip_hl << 2;
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cc -= hlen;
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if (as_path)
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Printf(" [AS%d]", as_lookup(asn, &from->sin_addr));
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if (nflag)
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Printf(" %s", inet_ntoa(from->sin_addr));
|
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else
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@ -1764,8 +1791,8 @@ usage(void)
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|
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Fprintf(stderr, "Version %s\n", version);
|
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Fprintf(stderr,
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"Usage: %s [-dDeFInrSvx] [-f first_ttl] [-g gateway] [-i iface]\n"
|
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"Usage: %s [-adDeFInrSvx] [-f first_ttl] [-g gateway] [-i iface]\n"
|
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"\t[-m max_ttl] [-p port] [-P proto] [-q nqueries] [-s src_addr]\n"
|
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"\t[-t tos] [-w waittime] [-z pausemsecs] host [packetlen]\n", prog);
|
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"\t[-t tos] [-w waittime] [-A as_server] [-z pausemsecs] host [packetlen]\n", prog);
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exit(1);
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}
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@ -5,7 +5,7 @@ TRACEROUTE_DISTDIR?= ${.CURDIR}/../../contrib/traceroute
|
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PROG= traceroute
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MAN= traceroute.8
|
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SRCS= version.c traceroute.c ifaddrlist.c findsaddr-socket.c
|
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SRCS= as.c version.c traceroute.c ifaddrlist.c findsaddr-socket.c
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BINOWN= root
|
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BINMODE=4555
|
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CLEANFILES= version.c
|
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|
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