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#!/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;
use POSIX qw(strftime);
my $table;
my $ebtables = "@sbindir@/ebtables";
my $cnt = "";
my $version = "1.1";
my $table_name;
my $modulesfh;
my @tables;
# ========================================================
# 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/^$/) {
next;
}
if ($cnt eq "--Lc") {
$line =~ s/, pcnt = (.*) -- bcnt = (.*)/-c $1 $2/;
} else {
$line =~ s/ $//;
}
$rules = $rules . "-A $chain $line\n";
}
print $chains;
print $rules;
print "\n";
}
# ========================================================
unless (-x $ebtables) { exit -1 };
open $modulesfh, '<', '/proc/modules' or die "Failed to open /proc/modules: $!";
while( my $line = <$modulesfh>) {
if($line =~ /^ebtable_([^ ]+)/) {
push @tables, $1;
}
}
close $modulesfh;
printf("# Generated by ebtables-save v$version (legacy) on %s\n", strftime("%a %FT%TZ", gmtime));
if (defined($ENV{'EBTABLES_SAVE_COUNTER'}) && $ENV{'EBTABLES_SAVE_COUNTER'} eq "yes") {
$cnt = "--Lc";
}
foreach $table_name (@tables) {
$table =`$ebtables -t $table_name -L $cnt`;
unless ($? == 0) { print $table; exit -1 };
&process_table($table);
}
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