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dpavlin |
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#!/usr/bin/perl |
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use warnings; |
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use strict; |
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use IO::Socket; |
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use Data::Dump qw/dump/; |
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my $port = 514; |
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my $MAXLEN = 1524; |
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my @facilities = ( qw/ |
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kernel user mail system security internal printer news uucp clock security2 |
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FTP NTP audit alert clock2 local0 local1 local2 local3 local4 local5 local6 local7 |
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/ ); |
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# Start Listening on UDP port 514 |
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my $sock = IO::Socket::INET->new( |
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LocalPort => $port, |
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Proto => 'udp' |
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# ReuseAddr => 1, |
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) || die "can't listen to $port: $!"; |
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print "INFO: listen on $port",$/; |
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my $rin = ''; |
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my $buf; |
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while(1) { |
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$sock->recv($buf, $MAXLEN); |
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my ($port, $ipaddr) = sockaddr_in($sock->peername); |
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my $hostname = gethostbyaddr($ipaddr, AF_INET); |
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my $ip = join('.', unpack('C4',$ipaddr)); |
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warn "# ",dump( $port, $ipaddr, $hostname, $buf ); |
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if ( $buf=~/<(\d+)>(.*?):(.*)/ ) { |
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my $pri=$1; |
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my $head=$2; |
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my $msg=$3; |
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my $sev=$pri % 8; |
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my $fac=($pri-$sev) / 8; |
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print dump( $ip, $port, $hostname, $pri, $head, $msg, $sev, $fac, $facilities[$fac] ),$/; |
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} |
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} |