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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "TrafficStats"
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "core_jni_helpers.h"
#include <jni.h>
#include <ScopedUtfChars.h>
#include <utils/misc.h>
#include <utils/Log.h>
namespace android {
static const char* QTAGUID_IFACE_STATS = "/proc/net/xt_qtaguid/iface_stat_fmt";
static const char* QTAGUID_UID_STATS = "/proc/net/xt_qtaguid/stats";
// NOTE: keep these in sync with TrafficStats.java
static const uint64_t UNKNOWN = -1;
enum StatsType {
RX_BYTES = 0,
RX_PACKETS = 1,
TX_BYTES = 2,
TX_PACKETS = 3,
TCP_RX_PACKETS = 4,
TCP_TX_PACKETS = 5
};
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;
}
}
static int parseIfaceStats(const char* iface, struct Stats* stats) {
FILE *fp = fopen(QTAGUID_IFACE_STATS, "r");
if (fp == NULL) {
return -1;
}
char buffer[384];
char cur_iface[32];
bool foundTcp = false;
uint64_t rxBytes, rxPackets, txBytes, txPackets, tcpRxPackets, tcpTxPackets;
while (fgets(buffer, sizeof(buffer), fp) != NULL) {
int matched = sscanf(buffer, "%31s %" SCNu64 " %" SCNu64 " %" SCNu64
" %" SCNu64 " " "%*u %" SCNu64 " %*u %*u %*u %*u "
"%*u %" SCNu64 " %*u %*u %*u %*u", cur_iface, &rxBytes,
&rxPackets, &txBytes, &txPackets, &tcpRxPackets, &tcpTxPackets);
if (matched >= 5) {
if (matched == 7) {
foundTcp = true;
}
if (!iface || !strcmp(iface, cur_iface)) {
stats->rxBytes += rxBytes;
stats->rxPackets += rxPackets;
stats->txBytes += txBytes;
stats->txPackets += txPackets;
if (matched == 7) {
stats->tcpRxPackets += tcpRxPackets;
stats->tcpTxPackets += tcpTxPackets;
}
}
}
}
if (!foundTcp) {
stats->tcpRxPackets = UNKNOWN;
stats->tcpTxPackets = UNKNOWN;
}
if (fclose(fp) != 0) {
return -1;
}
return 0;
}
static int parseUidStats(const uint32_t uid, struct Stats* stats) {
FILE *fp = fopen(QTAGUID_UID_STATS, "r");
if (fp == NULL) {
return -1;
}
char buffer[384];
char iface[32];
uint32_t idx, cur_uid, set;
uint64_t tag, rxBytes, rxPackets, txBytes, txPackets;
while (fgets(buffer, sizeof(buffer), fp) != NULL) {
if (sscanf(buffer,
"%" SCNu32 " %31s 0x%" SCNx64 " %u %u %" SCNu64 " %" SCNu64
" %" SCNu64 " %" SCNu64 "",
&idx, iface, &tag, &cur_uid, &set, &rxBytes, &rxPackets,
&txBytes, &txPackets) == 9) {
if (uid == cur_uid && tag == 0L) {
stats->rxBytes += rxBytes;
stats->rxPackets += rxPackets;
stats->txBytes += txBytes;
stats->txPackets += txPackets;
}
}
}
if (fclose(fp) != 0) {
return -1;
}
return 0;
}
static jlong getTotalStat(JNIEnv* env, jclass clazz, jint 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) {
ScopedUtfChars iface8(env, iface);
if (iface8.c_str() == NULL) {
return UNKNOWN;
}
struct Stats stats;
memset(&stats, 0, sizeof(Stats));
if (parseIfaceStats(iface8.c_str(), &stats) == 0) {
return getStatsType(&stats, (StatsType) type);
} else {
return UNKNOWN;
}
}
static jlong getUidStat(JNIEnv* env, jclass clazz, jint uid, jint type) {
struct Stats stats;
memset(&stats, 0, sizeof(Stats));
if (parseUidStats(uid, &stats) == 0) {
return getStatsType(&stats, (StatsType) type);
} else {
return UNKNOWN;
}
}
static JNINativeMethod gMethods[] = {
{"nativeGetTotalStat", "(I)J", (void*) getTotalStat},
{"nativeGetIfaceStat", "(Ljava/lang/String;I)J", (void*) getIfaceStat},
{"nativeGetUidStat", "(II)J", (void*) getUidStat},
};
int register_android_net_TrafficStats(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/net/TrafficStats", gMethods, NELEM(gMethods));
}
}
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