Hi,
Any resistance?
--
Pekka Savola "Tell me of difficulties surmounted,
Netcore Oy not those you stumble over and fall"
Systems. Networks. Security. -- Robert Jordan: A Crown of Swords
---------- Forwarded message ----------
Date: Sat, 13 Jan 2001 20:23:09 +0200 (EET)
From: Pekka Savola <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Convert port/protocol numbers to names unless -nn.
Hi,
As per discussions on workers list.
Try to convert protocol/port numbers to names with -n. The rationale is
that -n is almost always used to avoid DNS lookups and these aren't
necessary with this kind of resolving.
-nn can be used for old behaviour.
--
Pekka Savola "Tell me of difficulties surmounted,
Netcore Oy not those you stumble over and fall"
Systems. Networks. Security. -- Robert Jordan: A Crown of Swords
diff -uNr tcpdump-3.6.1.orig/addrtoname.c tcpdump-3.6.1/addrtoname.c
--- tcpdump-3.6.1.orig/addrtoname.c Sat Jan 13 20:01:00 2001
+++ tcpdump-3.6.1/addrtoname.c Sat Jan 13 19:59:23 2001
@@ -581,7 +581,7 @@
while (table->name)
table = table->nxt;
- if (nflag) {
+ if (nflag > 1) {
(void)snprintf(buf, sizeof(buf), "%d", port);
table->name = strdup(buf);
} else
@@ -745,7 +745,7 @@
f_localnet = localnet;
f_netmask = mask;
}
- if (nflag)
+ if (nflag > 1)
/*
* Simplest way to suppress names.
*/
diff -uNr tcpdump-3.6.1.orig/tcpdump.1 tcpdump-3.6.1/tcpdump.1
--- tcpdump-3.6.1.orig/tcpdump.1 Sat Jan 13 19:51:47 2001
+++ tcpdump-3.6.1/tcpdump.1 Sat Jan 13 19:50:19 2001
@@ -175,7 +175,11 @@
``tcpdump\ \ \-l \ \ > dat\ \ &\ \ tail\ \ \-f\ \ dat''.
.TP
.B \-n
-Don't convert addresses (i.e., host addresses, port numbers, etc.) to names.
+Don't convert host addresses to names. This can be used to avoid
+DNS lookups.
+.TP
+.B \-nn
+Don't convert protocol and port numbers etc. to names either.
.TP
.B \-N
Don't print domain name qualification of host names. E.g.,
