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 "core_jni_helpers.h"
27 #include <jni.h>
28 #include <nativehelper/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
getStatsType(struct Stats * stats,StatsType type)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
parseIfaceStats(const char * iface,struct Stats * stats)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
parseUidStats(const uint32_t uid,struct Stats * stats)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
getTotalStat(JNIEnv * env,jclass clazz,jint type)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
getIfaceStat(JNIEnv * env,jclass clazz,jstring iface,jint type)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
getUidStat(JNIEnv * env,jclass clazz,jint uid,jint type)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 const 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
register_android_net_TrafficStats(JNIEnv * env)194 int register_android_net_TrafficStats(JNIEnv* env) {
195 return RegisterMethodsOrDie(env, "android/net/TrafficStats", gMethods, NELEM(gMethods));
196 }
197
198 }
199