Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
Hi brian,

I modified your script to match my local config ("eth0" instead of "en1", removed "or src port 80" since I don't need that, and ran it as root directly, so no need for sudoing before). However, I got no output when using it. Here's what I have:
#!/usr/bin/perl use strict; my( $header, $packet ) = ('', ''); open STDIN, "/usr/sbin/tcpdump -lx -s 1024 dst port 80 |"; #die "Could not open tcpdump" unless $?; while( <> ) { chomp; if( /^\S+/ ) { print_packet( $header, $packet ); $header = $_; $packet = undef; next; } $packet .= $_; } sub print_packet { my( $header, $packet ) = @_; $packet =~ s/\s//g; $packet =~ s/.{104}//; # remove protocol info return unless length $packet > 0; $packet =~ s/0d0a0d0a.*/0d0/i; # Just keep the HTTP header my $pretty = ''; BYTE: while( $packet =~ m/\G([0-9a-f]{2})\s*/ig ) { my $hex = hex $1; if( $hex == 0x0D ) { $pretty .= "\n"; next BYTE } if( $hex == 0x0A ) { next BYTE } $pretty .= do { if( $hex < 0x20 or $hex > 0x7f ) { '.' } else { chr $hex } }; } if( $pretty =~ m/^(?:HTTP|GET|POST)/ ) { print_header( $header ); print $pretty; } return length $packet; } sub print_header { my $header = shift; my ( $time, $src, undef, $dst, ) = split /\s+/, $header; $time =~ s/\..*//; $dst =~ s/:$//; print "-" x 73, "\n"; print "Time: $time Src: $src Dst: $dst\n"; }

Cheers.

In reply to Re^2: converting tcpdump output by RnC
in thread converting tcpdump output by RnC

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others admiring the Monastery: (4)
As of 2024-03-28 17:15 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found