Merge "Add IFF_MULTICAST to test interfaces" am: aa5532cb6f am: e90ceefb34

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1856105

Change-Id: Id88dd9ea20c6a099e7f06f64f768fe04d22169b5

service/jni/com_android_server_TestNetworkService.cpp

@@ -66,6 +66,8 @@ static int createTunTapInterface(JNIEnv* env, bool isTun, const char* iface) {
     // Activate interface using an unconnected datagram socket.
     base::unique_fd inet6CtrlSock(socket(AF_INET6, SOCK_DGRAM, 0));
     ifr.ifr_flags = IFF_UP;
+    // Mark TAP interfaces as supporting multicast
+    if (!isTun) ifr.ifr_flags |= IFF_MULTICAST;
 
     if (ioctl(inet6CtrlSock.get(), SIOCSIFFLAGS, &ifr)) {
         throwException(env, errno, "activating", ifr.ifr_name);