dgram: reintroduce addMembership() and dropMembership()

Removed during the early stages of node 0.5 refactoring to libuv.

1 files changed, 16 insertions, 6 deletions

diff --git a/lib/dgram.js b/lib/dgram.js
index 26e0a2a3e8..42473b40e7 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -243,16 +243,26 @@ Socket.prototype.setMulticastLoopback = function(arg) {
 
 
 Socket.prototype.addMembership = function(multicastAddress,
-                                          multicastInterface) {
-  // are we ever going to support this in libuv?
-  throw new Error('not yet implemented');
+                                          interfaceAddress) {
+  this._healthCheck();
+
+  if (!multicastAddress) {
+    throw new Error('multicast address must be specified');
+  }
+
+  return this._handle.addMembership(multicastAddress, interfaceAddress);
 };
 
 
 Socket.prototype.dropMembership = function(multicastAddress,
-                                           multicastInterface) {
-  // are we ever going to support this in libuv?
-  throw new Error('not yet implemented');
+                                           interfaceAddress) {
+  this._healthCheck();
+
+  if (!multicastAddress) {
+    throw new Error('multicast address must be specified');
+  }
+
+  return this._handle.dropMembership(multicastAddress, interfaceAddress);
 };