dgram: reintroduce setMulticastTTL()

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

lib/dgram.js

@@ -237,7 +237,11 @@ Socket.prototype.setTTL = function(arg) {
 
 
 Socket.prototype.setMulticastTTL = function(arg) {
-  throw new Error('not yet implemented');
+  if (this._handle.setMulticastTTL(arg) == -1) {
+    throw errnoException(errno, 'setMulticastTTL');
+  }
+
+  return true;
 };
 
 

src/udp_wrap.cc

@@ -93,6 +93,7 @@ public:
   static Handle<Value> GetSockName(const Arguments& args);
   static Handle<Value> AddMembership(const Arguments& args);
   static Handle<Value> DropMembership(const Arguments& args);
+  static Handle<Value> SetMulticastTTL(const Arguments& args);
   static Handle<Value> SetBroadcast(const Arguments& args);
 
 private:
@@ -154,6 +155,7 @@ void UDPWrap::Initialize(Handle<Object> target) {
   NODE_SET_PROTOTYPE_METHOD(t, "getsockname", GetSockName);
   NODE_SET_PROTOTYPE_METHOD(t, "addMembership", AddMembership);
   NODE_SET_PROTOTYPE_METHOD(t, "dropMembership", DropMembership);
+  NODE_SET_PROTOTYPE_METHOD(t, "setMulticastTTL", SetMulticastTTL);
   NODE_SET_PROTOTYPE_METHOD(t, "setBroadcast", SetBroadcast);
 
   target->Set(String::NewSymbol("UDP"),
@@ -260,6 +262,20 @@ Handle<Value> UDPWrap::DropMembership(const Arguments& args) {
   return SetMembership(args, UV_LEAVE_GROUP);
 }
 
+Handle<Value> UDPWrap::SetMulticastTTL(const Arguments& args) {
+  HandleScope scope;
+  UNWRAP
+
+  assert(args.Length() == 1);
+
+  int ttl = args[0]->Uint32Value();
+  int r = uv_udp_set_multicast_ttl(&wrap->handle_, ttl);
+
+  if (r)
+    SetErrno(uv_last_error(uv_default_loop()));
+
+  return scope.Close(Integer::New(r));
+}
 
 Handle<Value> UDPWrap::DoSend(const Arguments& args, int family) {
   HandleScope scope;

test/simple/test-dgram-multicast-setTTL.js

@@ -0,0 +1,41 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('../common'),
+    assert = require('assert'),
+    dgram = require('dgram'),
+    thrown = false,
+    socket = dgram.createSocket('udp4');
+
+socket.bind(common.PORT);
+socket.setMulticastTTL(16);
+
+//Try to set an invalid TTL (valid ttl is > 0 and < 256)
+try {
+    socket.setMulticastTTL(1000);
+} catch (e) {
+    thrown = true;
+}
+
+assert(thrown, 'Setting an invalid mutlicast TTL should throw some error');
+
+//close the socket
+socket.close();