diff -upk.orig traceroute-1.0.3.orig/traceroute.1 traceroute-1.0.3/traceroute.1

--- traceroute-1.0.3.orig/traceroute.1	2005-11-10 22:09:19 +0000

+++ traceroute-1.0.3/traceroute.1	2005-11-10 22:18:46 +0000

@@ -4,7 +4,10 @@

 traceroute \- print the route packets take to network host

 .SH SYNOPSIS

 .na

-.BR traceroute " [" \-46FhnrRV "] [" "\-f first_ttl" "] [" "-p port" ]

+.BR traceroute " [" \-46FhnrRV "] [" "\-f first_ttl" ]

+.br

+.ti +8

+.BR "" [ "-P source_port" "] [" "-p destination_port" ]

 .br

 .ti +8

 .BR "" [ "-m max_hops" "] [" "-N concurrent_hops" ]

@@ -99,6 +102,18 @@ The default value is 6.

 .BI \-n

 Do not try to map IP addresses to host names when displaying them.

 .TP

+.BI \-P " port

+Specifies the UDP source port

+.I traceroute

+will use. When sending its UDP probe packets, it will send them from

+.IR port .

+If this port is already in use,

+.I traceroute

+will try to use next available port.  The default port is 64000;

+you can use

+.B \-P

+to change this to a different value.

+.TP

 .BI \-p " port

 Specifies the UDP destination port base

 .I traceroute

diff -upk.orig traceroute-1.0.3.orig/traceroute.c traceroute-1.0.3/traceroute.c

--- traceroute-1.0.3.orig/traceroute.c	2005-11-10 22:09:19 +0000

+++ traceroute-1.0.3/traceroute.c	2005-11-10 22:13:06 +0000

@@ -125,7 +125,7 @@ main(int argc, char **argv)

 	/* Set the locale - needed for international domain names */

 	setlocale (LC_ALL, "");

-	while ((c = getopt(argc, argv, "46DFVf:g:hi:m:N:np:t:w:q:rRs:")) != -1) {

+	while ((c = getopt(argc, argv, "46DFVf:g:hi:m:N:nP:p:t:w:q:rRs:")) != -1) {

 		switch (c) {

 		case '4':

 			af = AF_INET;

@@ -168,8 +168,12 @@ main(int argc, char **argv)

 			opt_noresolver = 1;

 			break;

+		case 'P':

+			src_port = getnum("source port", optarg, 1, 65535);

+			break;

+

 		case 'p':

-			dst_port = getnum("port", optarg, 1, 65535);

+			dst_port = getnum("destination port", optarg, 1, 65535);

 			break;

 		case 't':

@@ -353,7 +357,8 @@ static void

 usage(int exval)

 {

 	fprintf(exval ? stderr : stdout,

-	"usage: traceroute [-hnFV] [-f first_ttl] [-m max_hops] [-p port]\n"

+	"usage: traceroute [-hnFV] [-f first_ttl] [-m max_hops]\n"

+	"           [-P source_port] [-p destination_port]\n"

 	"           [-s source_addr] [-i interface] [-g gateway]\n"

 	"           [-t tos] [-w timeout] [-q nqueries] host [packetlen]\n");

 	exit(exval);