Net::SC - perl module for create the chain from the SOCKS servers.
# CONNECT TO HOST # ----------------
 ...
 $self = new Net::SC(
                     Timeout         => ( $opt{'to'}  || 10      ),
                     Chain_Len       => ( $opt{'l'}   || 2       ),
                     Debug           => ( $opt{'d'}   || 0x04    ),
                     Log_File        => ( $opt{'lf'}  || undef   ),
                     Random_Chain    => ( $opt{'rnd'} || 0       ),
                     Auto_Save       => 1
                  );
die unless ref $self;
 unless ( ( $rc = $self->connect( $host, $port ) ) == SOCKS_OKAY ) {
   print STDERR "Can't connect to $host:$port [".( socks_error($rc) )."]\n";
   exit;
 }
$sh = $self->sh;
print $sh, "Hello !!!\n"; ...
 #  BIND THE PORT
 # ---------------
 
 ...
 $self = new Net::SC(
                     Timeout         => ( $opt{'to'}  || 10      ),
                     Chain_len       => ( $opt{'l'}   || 2       ),
                     Debug           => ( $opt{'d'}   || 0x04    ),
                     Log_file        => ( $opt{'lf'}  || undef   ),
                     Random_chain    => ( $opt{'rnd'} || 0       ),
                     Auto_save       => 1
                  );
die unless ref $self;
 unless ( ( $rc = $self->bind( $host, $port ) ) == SOCKS_OKAY ) {
   print STDERR "Can't bind port [".( socks_error($rc) )."]\n";
   exit;
 }
 print STDOUT "Binding the port : ",
               $self->socks_param('listen_port'), "\n";
 print STDOUT "     in the host : ",
               $self->socks_param('listen_addr'), "\n";
 print STDOUT "     for $host\n";
        
 $self->configure( TIMEOUT => 45 );
 unless ( ( $rc = $self->accept() ) == SOCKS_OKAY ) {
        return $rc;
 } else {
   $sh = $self->sh;
 }
 
 print STDOUT 'Connect from: ',
                        $self->socks_param('listen_addr'), ':',
                        $self->socks_param('listen_port'), "\n";
 print $sh 'Hello : ', $self->socks_param('listen_addr'), "\n";
 print $sh ' port : ', $self->socks_param('listen_port'), "\n";
print STDOUT <$sh>; ...
For more information see examples: telnet_over_socks_chain.pl and accept_over_socks_chain.pl
TIMEOUT - Time Out in seconds.
CHAIN_LEN - Length of chain.
 DEBUG         - Debug level ( 0x00 | 0x01 | 0x02 | 0x04 )
                 0x00 - Off
                 0x01 - Debug On
                 0x02 - Write all answers of socks servers.
                 0x04 - Write all requests of socks servers.
                 0x08 - Extended error information.
CHAIN_FILE - Configuration file name.
 LOG_FILE      - Log file name. if undef, writing
                 all errors to STDERR or `syslogd`
 RANDOM_CHAIN  - Rule for create the chains ( 0 || 1 ).
                 0 - create chain by index...
                 1 - create chain by random...
 CHECK_DELAY   - Delay time for the next usage this proxy if
                 the last connection failed ( in seconds )
AUTO_SAVE - Auto save the data of chain to the cache file.
LOG_FH - File Descriptor of LOG file.
Create new connection to remote host.
Usage:
die unless $self->connect( $peer_host, $peer_port ) == SOCKS_OKAY;
Binding port.
Usage:
die unless $self->bind( $peer_host, $peer_port ) == SOCKS_OKAY;
Accepting connection over SOCKS
Usage:
die unless $self->accept() == SOCKS_OKAY; $sh = $self->sh;
Returns the sock handle
Usage:
$sh = $self->sh;
Close the connection.
Usage:
$self->close;
Returns [ and modify ] the current configuration options.
Usage: # Change TIMEOUT $self->configure( TIMEOUT => 10 );
# Returns TIMEOUT $timeout = $self->configure( 'TIMEOUT' );
Returns parameters of the last server into the chain socks...
Usage:
$listen_addr = $self->socks_param( 'listen_Addr' );
or:
  $all_param = $self->socks_param();
  $listen_addr = $all_param->{'listen_addr'};
socks_error( ERROR_CODE )
Returns the error message.
Socks error codes:
    SOCKS_GENERAL_SOCKS_SERVER_FAILURE
    SOCKS_CONNECTION_NOT_ALLOWED_BY_RUL
    SOCKS_NETWORK_UNREACHABLE
    SOCKS_HOST_UNREACHABLE
    SOCKS_CONNECTION_REFUSED
    SOCKS_TTL_EXPIRED
    SOCKS_COMMAND_NOT_SUPPORTED
    SOCKS_ADDRESS_TYPE_NOT_SUPPORTED
    SOCKS_OKAY
    SOCKS_FAILED
    SOCKS_NO_IDENT
    SOCKS_USER_MISMATCH
    SOCKS_INCOMPLETE_AUTH
    SOCKS_BAD_AUTH
    SOCKS_SERVER_DENIES_AUTH_METHOD
    SOCKS_MISSING_SOCKS_SERVER_NET_DATA
    SOCKS_MISSING_PEER_NET_DATA
    SOCKS_SOCKS_SERVER_UNAVAILABLE
    SOCKS_TIMEOUT
    SOCKS_UNSUPPORTED_PROTOCOL_VERSION
    SOCKS_UNSUPPORTED_ADDRESS_TYPE
    SOCKS_HOSTNAME_LOOKUP_FAILURE
$self->read_chain_data();
Reading the configuration file.
$self->get_socks_count
Returns the number of the socks servers
$self->mark_proxy ( $proxy_id, $status );
     Mark the socks server with index $proxy_id how dead
     if $status not equally SOCKS_OKAY, otherwise
     clearing counter of the connection failure...
$self->dump_cfg_data();
Dump socks data, in the cache file.
$self->restore_cfg_data();
Restore socks data, from the cache file.
accept method change the follow variable, which returns of the socks_param:
listen_addr listen_port
Methods connect, bind, accept returnings SOCKS_OKAY if it succeeded.
#host : port : uid : pswd : socks_proto 192.168.1.90 : 1080 : : : 5 ...
You can use the comments in the configuration file, for this you must write `#' in the beginning of string...
perl, RFC 1928, RFC 1929, ...
 Okunev Igor V.  mailto:igor@prv.mts-nn.ru
                 http://www.mts-nn.ru/~gosha
                                 icq:106183300