Add IFF_MULTICAST to test interfaces
This allows using test interfaces for multicast scenarios, such as
testing mDNS behavior.
Test: atest CtsNetTestCases
Change-Id: Ib5d8a997176f910d499021fdcd12c361aff1233d
diff --git a/service/jni/com_android_server_TestNetworkService.cpp b/service/jni/com_android_server_TestNetworkService.cpp
index e7a40e5..1a0de32 100644
--- a/service/jni/com_android_server_TestNetworkService.cpp
+++ b/service/jni/com_android_server_TestNetworkService.cpp
@@ -66,6 +66,8 @@
// 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);