am 64ba5eaa: Concurrent multi-PDP support in TrafficStats (99cd6671) · Commits · e / os / android_frameworks_base

core/jni/android_net_TrafficStats.cpp

+34 −17

Original line number	Diff line number	Diff line
		@@ -66,10 +66,35 @@ static jlong readNumber(char const* filename) {
		#endif
		}

		// Return the number from the first file which exists and contains data
		static jlong tryBoth(char const* a, char const* b) {
		jlong num = readNumber(a);
		return num >= 0 ? num : readNumber(b);
		static const char* mobile_iface_list[] = {
		"rmnet0",
		"rmnet1",
		"rmnet2",
		"rmnet3",
		"ppp0",
		0
		};

		static jlong getAll(const char** iface_list, const char* what) {

		char filename[80];
		int idx = 0;
		bool supported = false;
		jlong total = 0;
		while (iface_list[idx] != 0) {

		snprintf(filename, sizeof(filename), "/sys/class/net/%s/statistics/%s",
		iface_list[idx], what);
		jlong number = readNumber(filename);
		if (number >= 0) {
		supported = true;
		total += number;
		}
		idx++;
		}
		if (supported) return total;

		return -1;
		}

		// Returns the sum of numbers from the specified path under /sys/class/net/*,
		@@ -107,30 +132,22 @@ static jlong readTotal(char const* suffix) {
		// each file every time (rather than caching which ones exist).

		static jlong getMobileTxPackets(JNIEnv* env, jobject clazz) {
		return tryBoth(
		"/sys/class/net/rmnet0/statistics/tx_packets",
		"/sys/class/net/ppp0/statistics/tx_packets");
		return getAll(mobile_iface_list, "tx_packets");
		}

		static jlong getMobileRxPackets(JNIEnv* env, jobject clazz) {
		return tryBoth(
		"/sys/class/net/rmnet0/statistics/rx_packets",
		"/sys/class/net/ppp0/statistics/rx_packets");
		return getAll(mobile_iface_list, "rx_packets");
		}

		static jlong getMobileTxBytes(JNIEnv* env, jobject clazz) {
		return tryBoth(
		"/sys/class/net/rmnet0/statistics/tx_bytes",
		"/sys/class/net/ppp0/statistics/tx_bytes");
		return getAll(mobile_iface_list, "tx_bytes");
		}

		static jlong getMobileRxBytes(JNIEnv* env, jobject clazz) {
		return tryBoth(
		"/sys/class/net/rmnet0/statistics/rx_bytes",
		"/sys/class/net/ppp0/statistics/rx_bytes");
		return getAll(mobile_iface_list, "rx_bytes");
		}

		static jlong getData(JNIEnv* env, char *what, jstring interface) {
		static jlong getData(JNIEnv* env, const char *what, jstring interface) {
		char filename[80];
		jboolean isCopy;