49 lines
1.1 KiB
Perl
49 lines
1.1 KiB
Perl
use strict;
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use IO::Select;
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use IO::Socket::UNIX;
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use IO::Socket::INET;
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my $path = shift;
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unlink($path);
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my $server = IO::Socket::UNIX->new(Listen => 1, Local => $path)
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or die "unable to listen on $path: $!";
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$| = 1;
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print "ready\n";
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while (my $client = $server->accept()) {
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sysread $client, my $buf, 8;
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my ($version, $cmd, $port, $ip) = unpack 'CCnN', $buf;
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next unless $version == 4; # socks4
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next unless $cmd == 1; # TCP stream connection
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# skip NUL-terminated id
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while (sysread $client, my $char, 1) {
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last unless ord($char);
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}
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# version(0), reply(5a == granted), port (ignored), ip (ignored)
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syswrite $client, "\x00\x5a\x00\x00\x00\x00\x00\x00";
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my $remote = IO::Socket::INET->new(PeerHost => $ip, PeerPort => $port)
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or die "unable to connect to $ip/$port: $!";
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my $io = IO::Select->new($client, $remote);
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while ($io->count) {
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for my $fh ($io->can_read(0)) {
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for my $pair ([$client, $remote], [$remote, $client]) {
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my ($from, $to) = @$pair;
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next unless $fh == $from;
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my $r = sysread $from, my $buf, 1024;
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if (!defined $r || $r <= 0) {
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$io->remove($from);
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next;
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}
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syswrite $to, $buf;
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}
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}
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}
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}
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