From marcs@znep.com Fri Apr 17 15:16:16 1998

Date: Sat, 22 Nov 1997 20:44:10 -0700 (MST)

From: Marc Slemko <marcs@znep.com>

To: TLOSAP <new-httpd@apache.org>

Subject: Re: Getting ethernet packets content under FreeBSD?  (fwd)

Reply-To: new-httpd@apache.org

Anyone too lazy to hack tcpdump (eg. my tcpdump has a -X option to display

the data in ASCII) can use something like the below to grab HTTP headers

when debugging broken clients.

Nothing complicated, but handy.

---------- Forwarded message ----------

Date: Sat, 22 Nov 1997 14:35:23 PST

From: Bill Fenner <fenner@parc.xerox.com>

To: Nate Williams <nate@mt.sri.com>

Cc: bmah@ca.sandia.gov, hackers@FreeBSD.ORG

Subject: Re: Getting ethernet packets content under FreeBSD? 

I usually just use this perl script, which I call "tcpdumpscii".

Then run "tcpdumpscii -s 1500 -x [other tcpdump args]".

  Bill

#!/import/misc/bin/perl

#

#

open(TCPDUMP,"tcpdump -l @ARGV|");

while (<TCPDUMP>) {

	if (/^\s+(\S\S)+/) {

		$sav = $_;

		$asc = "";

		while (s/\s*(\S\S)\s*//) {

			$i = hex($1);

			if ($i < 32 || $i > 126) {

				$asc .= ".";

			} else {

				$asc .= pack(C,hex($1));

			}

		}

		$foo = "." x length($asc);

		$_ = $sav;

		s/\t/        /g;

		s/^$foo/$asc/;

	}

	print;

}