[bug 911] Ipv4 multicast forwarding not going to all output interfaces in route

RELEASE_NOTES

@@ -103,6 +103,7 @@ many cases referencing the Bugzilla bug number
    - bug 906 - NSC TCP socket fork did not copy txbuffersize over
    - bug 908 - test.py should exit if waf dies
    - bug 910 - Change Wi-Fi "AccessClass" to something closer to the standard
+   - bug 911 - IPv4/v6 multicast forwarding not going to all output interfaces
    - bug 913 - Queue Enqueue/Drop trace sources behavior unintuitive
    - bug 916 - EnableAsciiAll ("prefix") does not work for YansWifiPhyHelper
    - bug 918 - samples/main-packet-header.cc is broken

src/internet-stack/ipv4-l3-protocol.cc

@@ -769,7 +769,7 @@ Ipv4L3Protocol::IpMulticastForward (Ptr<Ipv4MulticastRoute> mrtentry, Ptr<const
           rtentry->SetGateway (Ipv4Address::GetAny ());
           rtentry->SetOutputDevice (GetNetDevice (i));
           SendRealOut (rtentry, packet, h);
-          return; 
+          continue; 
         }
     }
 }

src/internet-stack/ipv6-l3-protocol.cc

@@ -933,7 +933,7 @@ void Ipv6L3Protocol::IpMulticastForward (Ptr<Ipv6MulticastRoute> mrtentry, Ptr<c
           rtentry->SetGateway (Ipv6Address::GetAny ());
           rtentry->SetOutputDevice (GetNetDevice (i));
           SendRealOut (rtentry, packet, h);
-          return;
+          continue;
         }
     }
 }