Offer parsed TCP interface statistics. (4b17a132) · Commits · e / os / android_frameworks_base

core/java/android/net/TrafficStats.java

+26 −0

Original line number	Diff line number	Diff line
		@@ -315,6 +315,30 @@ public class TrafficStats {
		return total;
		}

		/** {@hide} */
		public static long getMobileTcpRxPackets() {
		long total = 0;
		for (String iface : getMobileIfaces()) {
		final long stat = nativeGetIfaceStat(iface, TYPE_TCP_RX_PACKETS);
		if (stat != UNSUPPORTED) {
		total += stat;
		}
		}
		return total;
		}

		/** {@hide} */
		public static long getMobileTcpTxPackets() {
		long total = 0;
		for (String iface : getMobileIfaces()) {
		final long stat = nativeGetIfaceStat(iface, TYPE_TCP_TX_PACKETS);
		if (stat != UNSUPPORTED) {
		total += stat;
		}
		}
		return total;
		}

		/**
		* Get the total number of packets transmitted through the specified interface.
		*
		@@ -587,6 +611,8 @@ public class TrafficStats {
		private static final int TYPE_RX_PACKETS = 1;
		private static final int TYPE_TX_BYTES = 2;
		private static final int TYPE_TX_PACKETS = 3;
		private static final int TYPE_TCP_RX_PACKETS = 4;
		private static final int TYPE_TCP_TX_PACKETS = 5;

		private static native long nativeGetTotalStat(int type);
		private static native long nativeGetIfaceStat(String iface, int type);

core/jni/android_net_TrafficStats.cpp

+77 −60

Original line number	Diff line number	Diff line
		@@ -31,8 +31,7 @@

		namespace android {

		static const uint64_t VALUE_UNKNOWN = -1;
		static const char* IFACE_STAT_ALL = "/proc/net/xt_qtaguid/iface_stat_all";
		static const char* QTAGUID_IFACE_STATS = "/proc/net/xt_qtaguid/iface_stat_fmt";

		enum Tx_Rx {
		TX,
		@@ -46,20 +45,45 @@ enum Tcp_Udp {
		};

		// NOTE: keep these in sync with TrafficStats.java
		enum IfaceStatType {
		static const uint64_t UNKNOWN = -1;

		enum StatsType {
		RX_BYTES = 0,
		RX_PACKETS = 1,
		TX_BYTES = 2,
		TX_PACKETS = 3
		TX_PACKETS = 3,
		TCP_RX_PACKETS = 4,
		TCP_TX_PACKETS = 5
		};

		struct IfaceStat {
		struct Stats {
		uint64_t rxBytes;
		uint64_t rxPackets;
		uint64_t txBytes;
		uint64_t txPackets;
		uint64_t tcpRxPackets;
		uint64_t tcpTxPackets;
		};

		static uint64_t getStatsType(struct Stats* stats, StatsType type) {
		switch (type) {
		case RX_BYTES:
		return stats->rxBytes;
		case RX_PACKETS:
		return stats->rxPackets;
		case TX_BYTES:
		return stats->txBytes;
		case TX_PACKETS:
		return stats->txPackets;
		case TCP_RX_PACKETS:
		return stats->tcpRxPackets;
		case TCP_TX_PACKETS:
		return stats->tcpTxPackets;
		default:
		return UNKNOWN;
		}
		}

		// Returns an ASCII decimal number read from the specified file, -1 on error.
		static jlong readNumber(char const* filename) {
		char buf[80];
		@@ -81,79 +105,72 @@ static jlong readNumber(char const* filename) {
		return atoll(buf);
		}

		static int parseIfaceStat(const char* iface, struct IfaceStat* stat) {
		FILE *fp = fopen(IFACE_STAT_ALL, "r");
		if (!fp) {
		return errno;
		static int parseIfaceStats(const char* iface, struct Stats* stats) {
		FILE *fp = fopen(QTAGUID_IFACE_STATS, "r");
		if (fp == NULL) {
		return -1;
		}

		char buffer[256];
		char cur_iface[32];
		int active;
		uint64_t rxBytes, rxPackets, txBytes, txPackets, devRxBytes, devRxPackets, devTxBytes,
		devTxPackets;

		while (fgets(buffer, 256, fp) != NULL) {
		if (sscanf(buffer, "%31s %d %llu %llu %llu %llu %llu %llu %llu %llu", cur_iface, &active,
		&rxBytes, &rxPackets, &txBytes, &txPackets, &devRxBytes, &devRxPackets,
		&devTxBytes, &devTxPackets) != 10) {
		continue;
		bool foundTcp = false;
		uint64_t rxBytes, rxPackets, txBytes, txPackets, tcpRxPackets, tcpTxPackets;

		while (fgets(buffer, sizeof(buffer), fp) != NULL) {
		int matched = sscanf(buffer, "%31s %llu %llu %llu %llu "
		"%llu %llu %llu %llu %llu %*llu "
		"%llu %llu %llu %llu %llu %*llu", cur_iface, &rxBytes,
		&rxPackets, &txBytes, &txPackets, &tcpRxPackets, &tcpTxPackets);
		if (matched >= 5) {
		if (matched == 7) {
		foundTcp = true;
		}

		if (!iface \|\| !strcmp(iface, cur_iface)) {
		stat->rxBytes += rxBytes;
		stat->rxPackets += rxPackets;
		stat->txBytes += txBytes;
		stat->txPackets += txPackets;

		if (active) {
		stat->rxBytes += devRxBytes;
		stat->rxPackets += devRxPackets;
		stat->txBytes += devTxBytes;
		stat->txPackets += devTxPackets;
		stats->rxBytes += rxBytes;
		stats->rxPackets += rxPackets;
		stats->txBytes += txBytes;
		stats->txPackets += txPackets;
		if (matched == 7) {
		stats->tcpRxPackets += tcpRxPackets;
		stats->tcpTxPackets += tcpTxPackets;
		}
		}
		}

		fclose(fp);
		return 0;
		}

		static uint64_t getIfaceStatType(const char* iface, IfaceStatType type) {
		struct IfaceStat stat;
		memset(&stat, 0, sizeof(IfaceStat));

		if (parseIfaceStat(iface, &stat)) {
		return VALUE_UNKNOWN;
		if (!foundTcp) {
		stats->tcpRxPackets = UNKNOWN;
		stats->tcpTxPackets = UNKNOWN;
		}

		switch (type) {
		case RX_BYTES:
		return stat.rxBytes;
		case RX_PACKETS:
		return stat.rxPackets;
		case TX_BYTES:
		return stat.txBytes;
		case TX_PACKETS:
		return stat.txPackets;
		default:
		return VALUE_UNKNOWN;
		if (fclose(fp) != 0) {
		return -1;
		}
		return 0;
		}

		static jlong getTotalStat(JNIEnv* env, jclass clazz, jint type) {
		return getIfaceStatType(NULL, (IfaceStatType) type);
		struct Stats stats;
		memset(&stats, 0, sizeof(Stats));
		if (parseIfaceStats(NULL, &stats) == 0) {
		return getStatsType(&stats, (StatsType) type);
		} else {
		return UNKNOWN;
		}
		}

		static jlong getIfaceStat(JNIEnv* env, jclass clazz, jstring iface, jint type) {
		struct IfaceStat stat;
		const char* ifaceChars = env->GetStringUTFChars(iface, NULL);
		if (ifaceChars) {
		uint64_t stat = getIfaceStatType(ifaceChars, (IfaceStatType) type);
		env->ReleaseStringUTFChars(iface, ifaceChars);
		return stat;
		ScopedUtfChars iface8(env, iface);
		if (iface8.c_str() == NULL) {
		return UNKNOWN;
		}

		struct Stats stats;
		memset(&stats, 0, sizeof(Stats));
		if (parseIfaceStats(NULL, &stats) == 0) {
		return getStatsType(&stats, (StatsType) type);
		} else {
		return VALUE_UNKNOWN;
		return UNKNOWN;
		}
		}