diff --git a/src/ipc.cr b/src/ipc.cr
index 955c2ab..231297d 100644
--- a/src/ipc.cr
+++ b/src/ipc.cr
@@ -190,8 +190,8 @@ class IPC::Event
 end
 
 class IPC::Connection
-	@closed = false
-	@connection : LibIPC::Connection
+	getter connection : LibIPC::Connection
+	getter closed = false
 
 	# connection already established
 	def initialize(c : LibIPC::Connection)
@@ -250,7 +250,7 @@ class IPC::Connection
 		r = LibIPC.ipc_close(pointerof(@connection))
 		if r != 0
 			m = String.new LibIPC.ipc_errors_get (r)
-			raise Exception.new "cannot close correctly the connection: #{m}"
+			raise Exception.new "cannot correctly close the connection: #{m}"
 		end
 
 		@closed = true
@@ -281,7 +281,16 @@ class IPC::Service
 		close
 	end
 
-	def add_file_descriptor (fd : Int)
+	def << (connection : IPC::Connection)
+		c = connection.connection
+		r = LibIPC.ipc_add(pointerof(@connections), pointerof(c))
+		if r != 0
+			m = String.new LibIPC.ipc_errors_get (r)
+			raise Exception.new "cannot add an arbitrary file descriptor: #{m}"
+		end
+	end
+
+	def << (fd : Int)
 		r = LibIPC.ipc_add_fd(pointerof(@connections), fd)
 		if r != 0
 			m = String.new LibIPC.ipc_errors_get (r)
@@ -289,14 +298,13 @@ class IPC::Service
 		end
 	end
 
-	# TODO: not implemented in libipc, yet.
-	# def del_file_descriptor (fd : Int)
-	# 	r = LibIPC.ipc_del_fd(pointerof(@connections), fd)
-	# 	if r != 0
-	# 		m = String.new LibIPC.ipc_errors_get (r)
-	# 		raise Exception.new "cannot remove an arbitrary file descriptor: #{m}"
-	# 	end
-	# end
+	def remove_fd (fd : Int)
+		r = LibIPC.ipc_del_fd(pointerof(@connections), fd)
+		if r != 0
+			m = String.new LibIPC.ipc_errors_get (r)
+			raise Exception.new "cannot remove an arbitrary file descriptor: #{m}"
+		end
+	end
 
 	def close
 		return if @closed