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Add a min TTL flag to go along with the max TTL flag. That is, this flag

Browse Source 
allows you to start tracing at a hop number other than 1.

Submitted by:	Stefan `Sec` Zehl <sec@42.org>
This commit is contained in:
archie 1999-05-12 17:28:31 +00:00
parent 8298b209c5
commit cb4c2dcf62
2 changed files with 44 additions and 20 deletions
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30
contrib/traceroute/traceroute.8
View File

@ -13,14 +13,14 @@
.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
.\" WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.\" $Header: /home/ncvs/src/contrib/traceroute/traceroute.8,v 1.3 1998/01/09 18:46:53 steve Exp $
.\" $Header: /home/ncvs/src/contrib/traceroute/traceroute.8,v 1.4 1999/05/06 03:23:23 archie Exp $
.\"
.TH TRACEROUTE 8 "27 September 1996"
.UC 6
.SH NAME
traceroute \- print the route packets take to network host
.SH SYNOPSIS
.. while ((op = getopt(argc, argv, "dnrvg:m:p:q:s:t:w:")) != EOF)
.. while ((op = getopt(argc, argv, "dnrvg:M:m:P:p:q:s:t:w:")) != EOF)
.na
.B traceroute
[
@ -29,35 +29,39 @@ traceroute \- print the route packets take to network host
.B \-g
.I gw_host
] [
.B \-m
max_ttl
.I ]
.B \-M
.I min_ttl
]
.br
.ti +8
[
.B \-m
.I max_ttl
] [
.B \-P
.I proto
] [
.B \-p
.I port
] [
.B \-q
.I nqueries
]
.br
.ti +8
[
.B \-q
.I nqueries
] [
.B \-s
.I src_addr
] [
.B \-t
.I tos
] [
.B \-w
.I waittime
]
.br
.ti +8
[
.B \-w
.I waittime
]
.I host
[
.I packetlen
@ -86,6 +90,10 @@ Print a summary of how many probes were not answered for each hop.
.B \-g
Specify a loose source route gateway (8 maximum).
.TP
.B \-M
Set the initial time-to-live value used in outgoing probe packets.
The default is 1, i.e., start with the first hop.
.TP
.B \-m
Set the max time-to-live (max number of hops) used in outgoing probe
packets. The default is 30 hops (the same default used for TCP

34
contrib/traceroute/traceroute.c
View File

@ -24,7 +24,7 @@ static const char copyright[] =
"@(#) Copyright (c) 1988, 1989, 1991, 1994, 1995, 1996\n\
The Regents of the University of California. All rights reserved.\n";
static const char rcsid[] =
"@(#)$Header: /home/ncvs/src/contrib/traceroute/traceroute.c,v 1.8 1999/02/16 14:19:50 des Exp $ (LBL)";
"@(#)$Header: /home/ncvs/src/contrib/traceroute/traceroute.c,v 1.9 1999/05/06 03:23:24 archie Exp $ (LBL)";
#endif
/*
@ -298,6 +298,7 @@ char *source;
char *hostname;
int nprobes = 3;
int min_ttl = 1;
int max_ttl = 30;
u_short ident;
u_short port; /* protocol specific base "port" */
@ -412,7 +413,7 @@ main(int argc, char **argv)
prog = argv[0];
opterr = 0;
while ((op = getopt(argc, argv, "Sdnrvg:m:P:p:q:s:t:w:")) != EOF)
while ((op = getopt(argc, argv, "Sdnrvg:M:m:P:p:q:s:t:w:")) != EOF)
switch (op) {
case 'S':
@ -433,11 +434,20 @@ main(int argc, char **argv)
++lsrr;
break;
case 'M':
min_ttl = atoi(optarg);
if (min_ttl < 1 || min_ttl > 0xff) {
Fprintf(stderr, "%s: invalid ttl value %s\n",
prog, optarg);
exit(1);
}
break;
case 'm':
max_ttl = atoi(optarg);
if (max_ttl <= 1) {
Fprintf(stderr, "%s: max ttl must be > 1\n",
prog);
if (max_ttl < 1 || max_ttl > 0xff) {
Fprintf(stderr, "%s: invalid ttl value %s\n",
prog, optarg);
exit(1);
}
break;
@ -532,6 +542,12 @@ main(int argc, char **argv)
usage();
}
/* Check min vs. max TTL */
if (min_ttl > max_ttl) {
Fprintf(stderr, "%s: min ttl must be <= max ttl\n", prog);
exit(1);
}
/* Process destination and optional packet size */
switch (argc - optind) {
@ -705,7 +721,7 @@ main(int argc, char **argv)
Fprintf(stderr, ", %d hops max, %d byte packets\n", max_ttl, packlen);
(void)fflush(stderr);
for (ttl = 1; ttl <= max_ttl; ++ttl) {
for (ttl = min_ttl; ttl <= max_ttl; ++ttl) {
u_int32_t lastaddr = 0;
int got_there = 0;
int unreachable = 0;
@ -1205,8 +1221,8 @@ usage(void)
extern char version[];
Fprintf(stderr, "Version %s\n", version);
Fprintf(stderr, "Usage: %s [-dnrv] [-w wait] [-m max_ttl] [-p port#] \
[-q nqueries]\n\t [-t tos] [-s src_addr] [-g gateway] host [data_size]\n",
prog);
Fprintf(stderr, "Usage: %s [-dnrv] [-w wait] [-m max_ttl] [-M min_ttl] \
[-P proto]\n\t [-p port#] [-q nqueries] [-t tos] [-s src_addr] [-g gateway] \
\n\t host [data_size]\n", prog);
exit(1);
}