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#!/usr/bin/perl -w
#
#
# A script that imports text ebtables rules. Similar to iptables-restore.
# It can be used to restore configuration from /etc/sysconfig/ebtables.
#
use strict;
my $ebtables = "__EXEC_PATH__/ebtables";
my $table = "";
my $rc;
my $child;
my $line;
# ==============================
# Check table
# Creates user chains.
# ==============================
sub check_chain {
if ($table eq "filter") {
if ($_[1] eq "INPUT") { return; }
if ($_[1] eq "FORWARD") { return; }
if ($_[1] eq "OUTPUT") { return; }
}
if ($table eq "nat") {
if ($_[1] eq "PREROUTING") { return; }
if ($_[1] eq "POSTROUTING") { return; }
if ($_[1] eq "OUTPUT") { return; }
}
if ($table eq "broute") {
if ($_[1] eq "BROUTING") { return; }
}
$rc = `$ebtables -t $_[0] -N $_[1]`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
}
# ==============================
if (-x "__EXEC_PATH__/ebtablesd" && -x "__EXEC_PATH__/ebtablesu") {
`killall ebtablesd 2>/dev/null`;
$child = fork();
if ($child == 0) {
$rc = `__EXEC_PATH__/ebtablesd`;
if (!($rc eq "")) {
exit -1;
}
exit 0;
}
$ebtables = "__EXEC_PATH__/ebtablesu";
while (!(-e "__PIPE__")) {
if ((kill 0) < $child) {
exit -1;
}
}
} else {
unless (-x $ebtables) { print "ERROR: $ebtables isn't executable\n"; exit -1; };
}
$line = 0;
while(<>) {
$line++;
if(m/^#/) { next; };
if(m/^$/) { next; };
if ($ebtables eq "__EXEC_PATH__/ebtablesu") {
if ((kill 0) < $child) {
exit -1;
}
}
if(m/^\*(.*)/) {
if (!($table eq "")) {
if (!defined($ENV{'EBTABLES_SAVE_COUNTER'}) || !($ENV{'EBTABLES_SAVE_COUNTER'} eq "yes")) {
$rc = `$ebtables -t $table -Z`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
}
if ($ebtables eq "__EXEC_PATH__/ebtablesu") {
$rc = `$ebtables commit $table`;
$rc = `$ebtables free $table`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
}
}
$table = $1;
if ($ebtables eq "__EXEC_PATH__/ebtablesu") {
$rc = `$ebtables open $table`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
$rc = `$ebtables -F`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
} else {
$rc = `$ebtables -t filter --init-table`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
}
next;
}
if(m/^\:(.*?)\s(.*)/) {
&check_chain($table,$1);
$rc = `$ebtables -t $table -P $1 $2`;
unless($? == 0) {print "ERROR(line $line): $rc\n"; exit -1};
next;
}
$rc = `$ebtables -t $table $_`;
unless($? == 0) {print "ERROR(line $line): $rc\n"; exit -1};
}
if (!($table eq "")) {
if (!defined($ENV{'EBTABLES_SAVE_COUNTER'}) || !($ENV{'EBTABLES_SAVE_COUNTER'} eq "yes")) {
$rc = `$ebtables -t $table -Z`;
unless($? == 0) {print "ERROR: '-t $table -Z' failed\n"; exit -1};
}
if ($ebtables eq "__EXEC_PATH__/ebtablesu") {
$rc = `$ebtables commit $table`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
}
}
if ($ebtables eq "__EXEC_PATH__/ebtablesu") {
$rc = `$ebtables quit`;
unless($? == 0) {print "ERROR: $rc\n"; exit -1};
waitpid($child,0);
exit 0;
}
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