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tcpdumpscii.txt
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时间:2024-04-15

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tcpdumpscii
From marcs@ Fri Apr 17 15:16:16 1998 Date: Sat, 22 Nov 1997 20:44:10 -0700 (MST) From: Marc Slemko <marcs@> 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@> To: Nate Williams <nate@> 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; }

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