Module: Sockit::V4::Connection

Included in:

Sockit

Defined in:

lib/sockit/v4/connection.rb

Instance Method Summary (collapse)

• - (Object) build_v4_connection_request(host, port)

  SOCKS v4 Client Connection Request field 1: SOCKS version number, 1 byte (must be 0x04 for this version) field 2: command code, 1 byte: 0x01 = establish a TCP/IP stream connection field 3: port number in a network byte order, 2 bytes field 4: destination address of 4 bytes for IPv4 address field 5: userid variables bytes for userid, null terminate (0x00).

• - (Object) process_v4_connection_response(socket)

  SOCKS v4 Server Connection Response field 1: version number, 1 byte (must be 0x00) field 2: result code, 1 byte: 90 = request granted 91 = request rejected or failed 92 = request rejected because SOCKS server can not connect to identd on the client 93 = request rejected because the client program and identd report different user-ids field 3: port number in a network byte order, 2 bytes field 4: destination address of 4 bytes for IPv4 address.

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# File 'lib/sockit/v4/connection.rb', line 14

def build_v4_connection_request(host, port)
  data = Array.new
  data << [config.version.to_i, 0x01].pack("C*")

  data << [port.to_i].pack("n")
  if host =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/
    data << [$1.to_i, $2.to_i, $3.to_i, $4.to_i].pack("C*")
  end
  data << config.username
  data << [0x00].pack("C*")

  data
end

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# File 'lib/sockit/v4/connection.rb', line 38

def process_v4_connection_response(socket)
  packet = socket.recv(2).unpack("C*")
  dump(:read, packet)
  version = packet[0]
  result_code = packet[1]

  case result_code
  when 90 then
    log(:green, build_v4_result_code_message(result_code))
  else
    raise SockitError, build_v4_result_code_message(result_code)
  end

  port = socket.recv(2).unpack("n")
  dump(:read, port)

  host = socket.recv(4).unpack("C*")
  dump(:read, host)

  [host.join('.'), port.join]
end