Module: Sockit::V5::Connection

Included in:

Sockit

Defined in:

lib/sockit/v5/connection.rb

Instance Method Summary (collapse)

• - (Object) build_v5_connection_request(host, port)

  SOCKS v5 Client Connection Request field 1: SOCKS version number, 1 byte (must be 0x05 for this version) field 2: command code, 1 byte: 0x01 = establish a TCP/IP stream connection 0x02 = establish a TCP/IP port binding 0x03 = associate a UDP port field 3: reserved, must be 0x00 field 4: address type, 1 byte: 0x01 = IPv4 address 0x03 = Domain name 0x04 = IPv6 address field 5: destination address of 4 bytes for IPv4 address 1 byte of name length followed by the name for Domain name 16 bytes for IPv6 address field 6: port number in a network byte order, 2 bytes.

• - (Object) process_v5_connection_response(socket)

  SOCKS v5 Server Connection Response field 1: SOCKS protocol version, 1 byte (0x05 for this version) field 2: status, 1 byte: 0x00 = request granted 0x01 = general failure 0x02 = connection not allowed by ruleset 0x03 = network unreachable 0x04 = host unreachable 0x05 = connection refused by destination host 0x06 = TTL expired 0x07 = command not supported / protocol error 0x08 = address type not supported field 3: reserved, must be 0x00 field 4: address type, 1 byte: 0x01 = IPv4 address 0x03 = Domain name 0x04 = IPv6 address field 5: destination address of 4 bytes for IPv4 address 1 byte of name length followed by the name for Domain name 16 bytes for IPv6 address field 6: network byte order port number, 2 bytes.

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# File 'lib/sockit/v5/connection.rb', line 21

def build_v5_connection_request(host, port)
  data = Array.new
  data << [config.version.to_i, 0x01, 0x00].pack("C*")

  if host =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/
    data << [0x01].pack("C*")
    data << [$1.to_i, $2.to_i, $3.to_i, $4.to_i].pack("C*")
  elsif host =~ /^[:0-9a-f]+$/
    data << [0x04].pack("C*")
    data << [$1].pack("C*")
  else
    data << [0x03].pack("C*")
    data << [host.length.to_i].pack("C*")
    data << host
  end
  data << [port.to_i].pack("n")

  data
end

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# File 'lib/sockit/v5/connection.rb', line 63

def process_v5_connection_response(socket)
  packet = socket.recv(4).unpack("C*")
  dump(:read, packet)
  socks_version = packet[0]
  result_code = packet[1]
  reserved = packet[2]
  address_type = packet[3]

  if result_code == 0x00
    log(:green, build_v5_result_code_message(result_code))
  else
    raise SockitError, build_v5_result_code_message(result_code)
  end

  address_length = case address_type
  when 0x01 then
    4
  when 0x03 then
    data = socket.recv(1).unpack("C*")
    dump(:read, data)
    data[0]
  when 0x04 then
    16
  end
  host = socket.recv(address_length).unpack("C*")
  dump(:read, host)

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

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