1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #define LOG_TAG "TrafficStats" 18 19 #include <dirent.h> 20 #include <errno.h> 21 #include <fcntl.h> 22 #include <inttypes.h> 23 #include <sys/stat.h> 24 #include <sys/types.h> 25 26 #include <android_runtime/AndroidRuntime.h> 27 #include <jni.h> 28 #include <ScopedUtfChars.h> 29 #include <utils/misc.h> 30 #include <utils/Log.h> 31 32 namespace android { 33 34 static const char* QTAGUID_IFACE_STATS = "/proc/net/xt_qtaguid/iface_stat_fmt"; 35 static const char* QTAGUID_UID_STATS = "/proc/net/xt_qtaguid/stats"; 36 37 // NOTE: keep these in sync with TrafficStats.java 38 static const uint64_t UNKNOWN = -1; 39 40 enum StatsType { 41 RX_BYTES = 0, 42 RX_PACKETS = 1, 43 TX_BYTES = 2, 44 TX_PACKETS = 3, 45 TCP_RX_PACKETS = 4, 46 TCP_TX_PACKETS = 5 47 }; 48 49 struct Stats { 50 uint64_t rxBytes; 51 uint64_t rxPackets; 52 uint64_t txBytes; 53 uint64_t txPackets; 54 uint64_t tcpRxPackets; 55 uint64_t tcpTxPackets; 56 }; 57 58 static uint64_t getStatsType(struct Stats* stats, StatsType type) { 59 switch (type) { 60 case RX_BYTES: 61 return stats->rxBytes; 62 case RX_PACKETS: 63 return stats->rxPackets; 64 case TX_BYTES: 65 return stats->txBytes; 66 case TX_PACKETS: 67 return stats->txPackets; 68 case TCP_RX_PACKETS: 69 return stats->tcpRxPackets; 70 case TCP_TX_PACKETS: 71 return stats->tcpTxPackets; 72 default: 73 return UNKNOWN; 74 } 75 } 76 77 static int parseIfaceStats(const char* iface, struct Stats* stats) { 78 FILE *fp = fopen(QTAGUID_IFACE_STATS, "r"); 79 if (fp == NULL) { 80 return -1; 81 } 82 83 char buffer[384]; 84 char cur_iface[32]; 85 bool foundTcp = false; 86 uint64_t rxBytes, rxPackets, txBytes, txPackets, tcpRxPackets, tcpTxPackets; 87 88 while (fgets(buffer, sizeof(buffer), fp) != NULL) { 89 int matched = sscanf(buffer, "%31s %" SCNu64 " %" SCNu64 " %" SCNu64 90 " %" SCNu64 " " "%*u %" SCNu64 " %*u %*u %*u %*u " 91 "%*u %" SCNu64 " %*u %*u %*u %*u", cur_iface, &rxBytes, 92 &rxPackets, &txBytes, &txPackets, &tcpRxPackets, &tcpTxPackets); 93 if (matched >= 5) { 94 if (matched == 7) { 95 foundTcp = true; 96 } 97 if (!iface || !strcmp(iface, cur_iface)) { 98 stats->rxBytes += rxBytes; 99 stats->rxPackets += rxPackets; 100 stats->txBytes += txBytes; 101 stats->txPackets += txPackets; 102 if (matched == 7) { 103 stats->tcpRxPackets += tcpRxPackets; 104 stats->tcpTxPackets += tcpTxPackets; 105 } 106 } 107 } 108 } 109 110 if (!foundTcp) { 111 stats->tcpRxPackets = UNKNOWN; 112 stats->tcpTxPackets = UNKNOWN; 113 } 114 115 if (fclose(fp) != 0) { 116 return -1; 117 } 118 return 0; 119 } 120 121 static int parseUidStats(const uint32_t uid, struct Stats* stats) { 122 FILE *fp = fopen(QTAGUID_UID_STATS, "r"); 123 if (fp == NULL) { 124 return -1; 125 } 126 127 char buffer[384]; 128 char iface[32]; 129 uint32_t idx, cur_uid, set; 130 uint64_t tag, rxBytes, rxPackets, txBytes, txPackets; 131 132 while (fgets(buffer, sizeof(buffer), fp) != NULL) { 133 if (sscanf(buffer, 134 "%" SCNu32 " %31s 0x%" SCNx64 " %u %u %" SCNu64 " %" SCNu64 135 " %" SCNu64 " %" SCNu64 "", 136 &idx, iface, &tag, &cur_uid, &set, &rxBytes, &rxPackets, 137 &txBytes, &txPackets) == 9) { 138 if (uid == cur_uid && tag == 0L) { 139 stats->rxBytes += rxBytes; 140 stats->rxPackets += rxPackets; 141 stats->txBytes += txBytes; 142 stats->txPackets += txPackets; 143 } 144 } 145 } 146 147 if (fclose(fp) != 0) { 148 return -1; 149 } 150 return 0; 151 } 152 153 static jlong getTotalStat(JNIEnv* env, jclass clazz, jint type) { 154 struct Stats stats; 155 memset(&stats, 0, sizeof(Stats)); 156 if (parseIfaceStats(NULL, &stats) == 0) { 157 return getStatsType(&stats, (StatsType) type); 158 } else { 159 return UNKNOWN; 160 } 161 } 162 163 static jlong getIfaceStat(JNIEnv* env, jclass clazz, jstring iface, jint type) { 164 ScopedUtfChars iface8(env, iface); 165 if (iface8.c_str() == NULL) { 166 return UNKNOWN; 167 } 168 169 struct Stats stats; 170 memset(&stats, 0, sizeof(Stats)); 171 if (parseIfaceStats(iface8.c_str(), &stats) == 0) { 172 return getStatsType(&stats, (StatsType) type); 173 } else { 174 return UNKNOWN; 175 } 176 } 177 178 static jlong getUidStat(JNIEnv* env, jclass clazz, jint uid, jint type) { 179 struct Stats stats; 180 memset(&stats, 0, sizeof(Stats)); 181 if (parseUidStats(uid, &stats) == 0) { 182 return getStatsType(&stats, (StatsType) type); 183 } else { 184 return UNKNOWN; 185 } 186 } 187 188 static JNINativeMethod gMethods[] = { 189 {"nativeGetTotalStat", "(I)J", (void*) getTotalStat}, 190 {"nativeGetIfaceStat", "(Ljava/lang/String;I)J", (void*) getIfaceStat}, 191 {"nativeGetUidStat", "(II)J", (void*) getUidStat}, 192 }; 193 194 int register_android_net_TrafficStats(JNIEnv* env) { 195 return AndroidRuntime::registerNativeMethods(env, "android/net/TrafficStats", 196 gMethods, NELEM(gMethods)); 197 } 198 199 } 200
