VPN: make the file descriptor non-blocking by default. (84bf7390) · Commits · e / os / android_frameworks_base

services/jni/com_android_server_connectivity_Vpn.cpp

+8 −0

Original line number	Diff line number	Diff line
		@@ -55,6 +55,7 @@ static int create_interface(int mtu, char name, int index)
		{
		int tun = open("/dev/tun", O_RDWR);
		int inet4 = socket(AF_INET, SOCK_DGRAM, 0);
		int flags;

		ifreq ifr4;
		memset(&ifr4, 0, sizeof(ifr4));
		@@ -86,6 +87,13 @@ static int create_interface(int mtu, char name, int index)
		goto error;
		}

		// Make it non-blocking.
		flags = fcntl(tun, F_GETFL, 0);
		if (flags == -1 \|\| fcntl(tun, F_SETFL, flags \| O_NONBLOCK)) {
		LOGE("Cannot set non-blocking on %s: %s", ifr4.ifr_name, strerror(errno));
		goto error;
		}

		strcpy(name, ifr4.ifr_name);
		*index = ifr4.ifr_ifindex;
		close(inet4);