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|
#!/usr/bin/perl
#
# Module: vyatta-show-conntrack.pl
#
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2010 Vyatta, Inc.
# All Rights Reserved.
#
# Author: Gaurav Sinha
# Date: Oct 2011
# Description: Script to show conntrack entries based on the input
# show command.
#
# **** End License ****
#
use Getopt::Long;
use XML::Simple;
use Data::Dumper;
use POSIX;
use lib "/opt/vyatta/share/perl5";
use Vyatta::Misc;
use warnings;
use strict;
use Switch;
my $format = "%-10s %-22s %-22s %-12s %-20s\n";
sub print_xml {
my ($data, $cache) = @_;
my $flow = 0;
my %flowh;
my $tcount = 0;
while (1) {
my $meta = 0;
last if ! defined $data->{flow}[$flow];
my $flow_ref = $data->{flow}[$flow];
my $flow_type = $flow_ref->{type};
my (%src, %dst, %sport, %dport, %proto, %protonum, $timeout_ref, $connection_id_ref,
$state_connection_ref);
while (1) {
my $meta_ref = $flow_ref->{meta}[$meta];
last if ! defined $meta_ref;
my $dir = $meta_ref->{direction};
if ($dir eq 'original' or $dir eq 'reply') {
my $l3_ref = $meta_ref->{layer3}[0];
my $l4_ref = $meta_ref->{layer4}[0];
if (defined $l3_ref) {
$src{$dir} = $l3_ref->{src}[0];
$dst{$dir} = $l3_ref->{dst}[0];
if (defined $l4_ref) {
$sport{$dir} = $l4_ref->{sport}[0];
$dport{$dir} = $l4_ref->{dport}[0];
$proto{$dir} = $l4_ref->{protoname};
$protonum{$dir} = $l4_ref->{protonum};
}
}
} elsif ($dir eq 'independent') {
$timeout_ref = $meta_ref->{timeout}[0];
$connection_id_ref = $meta_ref->{id}[0];
$state_connection_ref = $meta_ref->{state}[0];
}
$meta++;
}
my ($proto, $protonum, $in_src, $in_dst, $out_src, $out_dst, $connection_id,
$timeout, $state_connection);
$proto = $proto{original};
$protonum = $protonum{original};
$in_src = "$src{original}";
$in_src .= ":$sport{original}" if defined $sport{original};
$in_dst = "$dst{original}";
$in_dst .= ":$dport{original}" if defined $dport{original};
$connection_id = "$connection_id_ref";
$timeout = "$timeout_ref";
if ($state_connection_ref) {
$state_connection = "$state_connection_ref";
}
# not using these for now
$out_src = "|$dst{reply}|";
$out_src .= ":$dport{reply}" if defined $dport{reply};
$out_dst = "|$src{reply}|";
$out_dst .= ":$sport{reply}" if defined $sport{reply};
my $protocol = $proto . ' [' . $protonum . ']';
if ($state_connection) {
switch($state_connection) {
case ("ESTABLISHED") {
$protocol .= " ES";
}
case ("SYN_SENT") {
$protocol .= " SS";
}
case ("SYN_RECV") {
$protocol .= " SR";
}
case ("FIN_WAIT") {
$protocol .= " FW";
}
case ("CLOSE_WAIT") {
$protocol .= " CW";
}
case ("LAST_ACK") {
$protocol .= " LA";
}
case ("TIME_WAIT") {
$protocol .= " TW";
}
case ("CLOSED") {
$protocol .= " CL";
}
case ("LISTEN") {
$protocol .= " LI";
}
}
}
printf($format, $connection_id ,$in_src, $in_dst, $protocol, $timeout);
$flow++;
}
return $flow;
}
#
# main
#
my ($sourceIP, $destIP, $family);
GetOptions("source_IP=s" => \$sourceIP,
"dest_IP=s" => \$destIP,
"family=s" => \$family,
);
my $xs = XML::Simple->new(ForceArray => 1, KeepRoot => 0);
my ($xml1, $xml2, $data);
#build command string using <command_prefix><command>.
my $command_prefix = "sudo conntrack -L";
my $command = " --family $family";
my ($sourcePort, $destPort);
if ($family eq "ipv4") {
if ((defined $sourceIP) and $sourceIP =~ m/:/) {
#IP address and port entered, are of the form IP:port
my @address = split(/:/, $sourceIP);
$sourceIP = $address[0];
$sourcePort = $address[1];
my( $success, $err ) = isValidPortNumber($sourcePort);
if(!defined($success)) {
die "Please enter a valid source port number\n";
}
$command .= " --orig-port-src $sourcePort";
}
if ((defined $destIP) and $destIP =~ m/:/) {
my @address = split(/:/, $destIP);
$destIP = $address[0];
$destPort = $address[1];
my( $success, $err ) = isValidPortNumber($destPort);
if(!defined($success)) {
die "Please enter a valid destination port number\n";
}
$command .= " --orig-port-dst $destPort";
}
if ((defined $sourceIP) and !($sourceIP eq "0.0.0.0")) {
# Check if IP address is a valid IPv4 address
if (!(isIpAddress($sourceIP))) {
die "Please enter a valid source IPv4 address\n";
}
#If IP is any, do not add anything to command.
$command .= " -s $sourceIP";
}
if ((defined $destIP) and !($destIP eq "0.0.0.0")) {
# Check if IP address is a valid IPv4 address
if (!(isIpAddress($destIP))) {
die "Please enter a valid destination IPv4 address\n";
}
$command .= " -d $destIP";
}
} else {
#family IPv6 not supported, placeholder for v6 code.
}
$command .= " -o xml";
print "TCP state codes: SS - SYN SENT, SR - SYN RECEIVED, ES - ESTABLISHED,\n";
print " FW - FIN WAIT, CW - CLOSE WAIT, LA - LAST ACK,\n";
print " TW - TIME WAIT, CL - CLOSE, LI - LISTEN\n\n";
printf($format, 'CONN ID', 'Source', 'Destination', 'Protocol', 'TIMEOUT');
if ((defined($destPort)) or (defined($sourcePort))) {
my $command_final = $command_prefix." -p tcp".$command;
$xml1 = `$command_final 2> /dev/null`;
#Execute the command for UDP as well.
$command_final = $command_prefix." -p udp".$command;
$xml2 = `$command_final 2> /dev/null`;
} else {
my $command_final = $command_prefix.$command;
$xml1 = `$command_final 2> /dev/null`;
}
if ($xml1) {
$data = $xs->XMLin($xml1);
print_xml($data);
}
if ($xml2) {
$data = $xs->XMLin($xml2);
print_xml($data);
}
# end of file
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