qpsmtpd/plugins/check_relay
Ask Bjørn Hansen a23d4b3da9 Fix 01-syntax test failures
Exclude some tests with dependencies.

Remove -T from perl line in plugins
This makes it harder to test with PERL5LIB/perlbrew etc
2012-04-29 01:36:01 -07:00

74 lines
2.2 KiB
Perl

#!perl -w
# this plugin checks the relayclients config file and
# $ENV{RELAYCLIENT} to see if relaying is allowed.
#
use Net::IP qw(:PROC);
sub hook_connect {
my ($self, $transaction) = @_;
my $connection = $self->qp->connection;
# Check if this IP is allowed to relay
my $client_ip = $self->qp->connection->remote_ip;
# @crelay... for comparing, @srelay... for stripping
my (@crelay_clients, @srelay_clients);
my @relay_clients = $self->qp->config("relayclients");
for (@relay_clients) {
my ($range_ip, $range_prefix) = ip_splitprefix($_);
if($range_prefix){
# has a prefix, so due for comparing
push @crelay_clients, $_;
}
else {
# has no prefix, so due for splitting
push @srelay_clients, $_;
}
}
if (@crelay_clients){
my ($range_ip, $range_prefix, $rversion, $begin, $end, $bin_client_ip);
my $cversion = ip_get_version($client_ip);
for (@crelay_clients) {
# Get just the IP from the CIDR range, to get the IP version, so we can
# get the start and end of the range
($range_ip, $range_prefix) = ip_splitprefix($_);
$rversion = ip_get_version($range_ip);
($begin, $end) = ip_normalize($_, $rversion);
# expand the client address (zero pad it) before converting to binary
$bin_client_ip = ip_iptobin(ip_expand_address($client_ip, $cversion), $cversion);
if (ip_bincomp($bin_client_ip, 'gt', ip_iptobin($begin, $rversion))
&& ip_bincomp($bin_client_ip, 'lt', ip_iptobin($end, $rversion)))
{
$connection->relay_client(1);
last;
}
}
}
# If relay_client is already set, no point checking again
if (@srelay_clients && !$connection->relay_client) {
my $more_relay_clients = $self->qp->config("morerelayclients", "map");
my %srelay_clients = map { $_ => 1 } @srelay_clients;
$client_ip =~ s/::/:/;
($connection->relay_client(1) && undef($client_ip)) if $client_ip eq ":1";
while ($client_ip) {
if (exists($ENV{RELAYCLIENT}) or
exists($srelay_clients{$client_ip}) or
exists($more_relay_clients->{$client_ip}))
{
$connection->relay_client(1);
last;
}
$client_ip =~ s/(\d|\w)+(:|\.)?$//; # strip off another 8 bits
}
}
return (DECLINED);
}