#!/usr/bin/perl -w
#
#
# A script that generates text output of the ebtables rules.
# Similar to iptables-save.
#
# It can be used to store active configuration to /etc/sysconfig/ebtables

use strict;
my $table;

# ========================================================
# Process filter table
# ========================================================
sub process_table {
    my $chain = "";
    my $rules = "";
    my $chains = "";
    my $line = "";

    foreach $line (split("\n",$_[0])) {
        if ($line =~ m/Bridge table: (.*)/) {
            print "*$1\n";
            next;
        }
        if ($line =~ m/Bridge chain: (.*?), entries:.* policy: (.*)/) {
            $chains = $chains . ":$1 $2\n";
            $chain = $1;
            next;
        }
        if ($line =~ m/^$/) {
            next;
        }
        $rules = $rules . "-A $chain $line\n";
    }

    print $chains;
    print $rules;
    print "\n";
}
# ========================================================

unless (-x "/sbin/ebtables") { exit -1 };
$table =`/sbin/ebtables -t filter -L`;
unless ($? == 0) { print $table; exit -1 };
&process_table($table);
$table =`/sbin/ebtables -t nat -L`;
unless ($? == 0) { print $table; exit -1 };
&process_table($table);
$table =`/sbin/ebtables -t broute -L`;
unless ($? == 0) { print $table; exit -1 };
&process_table($table);