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package Protocol::SOCKS; |
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# ABSTRACT: abstract SOCKS protocol support |
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use strict; |
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use warnings; |
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our $VERSION = '0.003'; |
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=head1 NAME |
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Protocol::SOCKS - abstract support for the SOCKS5 network protocol |
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=head1 VERSION |
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Version 0.003 |
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=head1 DESCRIPTION |
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=cut |
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5059
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use Future; |
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44259
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12154
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use Socket qw(inet_pton inet_ntop inet_ntoa AF_INET AF_INET6); |
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use Protocol::SOCKS::Constants qw(:all); |
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our %REPLY_CODE = ( |
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0x00 => 'succeeded', |
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0x01 => 'general SOCKS server failure', |
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0x02 => 'connection not allowed by ruleset', |
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0x03 => 'Network unreachable', |
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0x04 => 'Host unreachable', |
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0x05 => 'Connection refused', |
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0x06 => 'TTL expired', |
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0x07 => 'Command not supported', |
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0x08 => 'Address type not supported', |
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); |
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=head1 METHODS |
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=cut |
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=head2 new |
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Instantiates this protocol object. |
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=cut |
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sub new { my $class = shift; bless { @_ }, $class } |
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=head2 version |
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Our protocol version. Usually 5. |
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=cut |
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sub version { shift->{version} ||= 5 } |
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=head2 write |
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Called when we want to write data. Requires a writer to be configured. |
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=cut |
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sub write { $_[0]->{writer}->($_[1]) } |
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=head2 new_future |
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67
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Instantiates a new L using the provided factory, or calls through to L->new. |
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=cut |
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sub new_future { (shift->{future_factory} ||= sub { Future->new })->() } |
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=head2 pack_fqdn |
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Packs a fully-qualified domain into a data structure. |
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=cut |
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79
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sub pack_fqdn { |
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3
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3
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1
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1225
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my $self = shift; |
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3
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$self->pack_address(ATYPE_FQDN, @_) |
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} |
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=head2 pack_ipv4 |
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Packs an IPv4 address into a data structure. |
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=cut |
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sub pack_ipv4 { |
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my $self = shift; |
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$self->pack_address(ATYPE_IPV4, @_) |
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} |
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=head2 pack_ipv6 |
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Packs an IPv6 address into a data structure. |
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=cut |
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sub pack_ipv6 { |
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my $self = shift; |
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$self->pack_address(ATYPE_IPV6, @_) |
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} |
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=head2 pack_address |
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Packs an address of the given type into a data structure. |
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=cut |
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sub pack_address { |
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my ($self, $type, $addr) = @_; |
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if($type == ATYPE_IPV4) { |
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50
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115
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4
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return pack('C1', $type) . inet_pton(AF_INET, $addr); |
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} elsif($type == ATYPE_IPV6) { |
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0
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return pack('C1', $type) . inet_pton(AF_INET6, $addr); |
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} elsif($type == ATYPE_FQDN) { |
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3
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return pack('C1C/a*', $type, $addr); |
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} else { |
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die sprintf 'unknown address type 0x%02x', $type; |
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} |
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} |
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=head2 extract_address |
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Extracts address information from a scalar ref. |
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=cut |
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sub extract_address { |
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1324
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my ($self, $buf) = @_; |
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return undef unless length($$buf) > 1; |
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my ($type) = unpack 'C1', substr $$buf, 0, 1; |
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if($type == ATYPE_IPV4) { |
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return undef unless length($$buf) >= (1 + 4); |
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(undef, my $ip) = unpack 'C1A4', substr $$buf, 0, 1 + 4, ''; |
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return '' unless $ip; |
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4
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return inet_ntoa($ip); |
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} elsif($type == ATYPE_IPV6) { |
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return undef unless length($$buf) >= (1 + 16); |
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(undef, my $ip) = unpack 'C1A16', substr $$buf, 0, 1 + 16, ''; |
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return inet_ntop(AF_INET6, $ip); |
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} elsif($type == ATYPE_FQDN) { |
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my ($len) = unpack 'C1', substr $$buf, 1, 1; |
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return undef unless length($$buf) >= (1 + 1 + $len); |
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(undef, my $host) = unpack 'C1C/a*', substr $$buf, 0, 1 + 1 + $len, ''; |
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return $host; |
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} else { |
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0
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die sprintf 'unknown address type 0x%02x', $type; |
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} |
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} |
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1; |
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__END__ |