Add some lib docs

lib/rex/proto/thrift.rb

@@ -2,6 +2,7 @@
 
 require 'bindata'
 
+# @see: https://diwakergupta.github.io/thrift-missing-guide/
 module Rex::Proto::Thrift
   class ThriftData < BinData::Record  # forward definition
     endian :big
@@ -141,6 +142,7 @@ class ThriftData < BinData::Record
       thrift_array    ThriftDataType::T_LIST
     end
 
+    # Short hand method for defining a boolean field
     def self.boolean(field_id, value)
       { data_type: ThriftDataType::T_BOOLEAN, field_id: field_id, data_value: value }
     end

lib/rex/proto/thrift/client.rb

@@ -63,10 +63,18 @@ def close
     @conn = nil
   end
 
+  # Send raw data to the remote peer.
+  #
+  # @param [String] data The data to send.
   def send_raw(data)
     @conn.put([data.length].pack('N') + data)
   end
 
+  # Receive raw data from the remote peer.
+  #
+  # @param [Float] timeout The timeout to use for this receive operation. Defaults to the instance timeout.
+  # @raise [Rex::TimeoutError] Raised when all of the data was not received within the timeout.
+  # @return [String] The received data.
   def recv_raw(timeout: @timeout)
     remaining = timeout
     frame_size, elapsed_time = Rex::Stopwatch.elapsed_time do
@@ -98,6 +106,14 @@ def recv_raw(timeout: @timeout)
     body
   end
 
+  # Call the specific method on the remote peer.
+  #
+  # @param [String] method_name The method name to call.
+  # @param [BinData::Struct, Hash, String] *data The data to send in the method call.
+  # @param [Float] timeout The timeout to use for this call operation. Defaults to the instance timeout.
+  # @raise [Error::UnexpectedReplyError] Raised if the reply was not to the method call.
+  # @raise [Rex::TimeoutError] Raised when all of the data was not received within the timeout.
+  # @return [Array<Hash>] The results of the method call.
   def call(method_name, *data, timeout: @timeout)
     tx_header = ThriftHeader.new(method_name: method_name, message_type: ThriftMessageType::CALL)
     tx_data = data.map do |part|