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 "NetworkStatsNative"
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 #include "android-base/unique_fd.h"
33 #include "bpf/BpfUtils.h"
34 #include "netdbpf/BpfNetworkStats.h"
35
36 using android::bpf::bpfGetUidStats;
37 using android::bpf::bpfGetIfaceStats;
38
39 namespace android {
40
41 static const char* QTAGUID_IFACE_STATS = "/proc/net/xt_qtaguid/iface_stat_fmt";
42 static const char* QTAGUID_UID_STATS = "/proc/net/xt_qtaguid/stats";
43
44 // NOTE: keep these in sync with TrafficStats.java
45 static const uint64_t UNKNOWN = -1;
46
47 enum StatsType {
48 RX_BYTES = 0,
49 RX_PACKETS = 1,
50 TX_BYTES = 2,
51 TX_PACKETS = 3,
52 TCP_RX_PACKETS = 4,
53 TCP_TX_PACKETS = 5
54 };
55
getStatsType(Stats * stats,StatsType type)56 static uint64_t getStatsType(Stats* stats, StatsType type) {
57 switch (type) {
58 case RX_BYTES:
59 return stats->rxBytes;
60 case RX_PACKETS:
61 return stats->rxPackets;
62 case TX_BYTES:
63 return stats->txBytes;
64 case TX_PACKETS:
65 return stats->txPackets;
66 case TCP_RX_PACKETS:
67 return stats->tcpRxPackets;
68 case TCP_TX_PACKETS:
69 return stats->tcpTxPackets;
70 default:
71 return UNKNOWN;
72 }
73 }
74
parseIfaceStats(const char * iface,Stats * stats)75 static int parseIfaceStats(const char* iface, Stats* stats) {
76 FILE *fp = fopen(QTAGUID_IFACE_STATS, "r");
77 if (fp == NULL) {
78 return -1;
79 }
80
81 char buffer[384];
82 char cur_iface[32];
83 bool foundTcp = false;
84 uint64_t rxBytes, rxPackets, txBytes, txPackets, tcpRxPackets, tcpTxPackets;
85
86 while (fgets(buffer, sizeof(buffer), fp) != NULL) {
87 int matched = sscanf(buffer, "%31s %" SCNu64 " %" SCNu64 " %" SCNu64
88 " %" SCNu64 " " "%*u %" SCNu64 " %*u %*u %*u %*u "
89 "%*u %" SCNu64 " %*u %*u %*u %*u", cur_iface, &rxBytes,
90 &rxPackets, &txBytes, &txPackets, &tcpRxPackets, &tcpTxPackets);
91 if (matched >= 5) {
92 if (matched == 7) {
93 foundTcp = true;
94 }
95 if (!iface || !strcmp(iface, cur_iface)) {
96 stats->rxBytes += rxBytes;
97 stats->rxPackets += rxPackets;
98 stats->txBytes += txBytes;
99 stats->txPackets += txPackets;
100 if (matched == 7) {
101 stats->tcpRxPackets += tcpRxPackets;
102 stats->tcpTxPackets += tcpTxPackets;
103 }
104 }
105 }
106 }
107
108 if (!foundTcp) {
109 stats->tcpRxPackets = UNKNOWN;
110 stats->tcpTxPackets = UNKNOWN;
111 }
112
113 if (fclose(fp) != 0) {
114 return -1;
115 }
116 return 0;
117 }
118
parseUidStats(const uint32_t uid,Stats * stats)119 static int parseUidStats(const uint32_t uid, Stats* stats) {
120 FILE *fp = fopen(QTAGUID_UID_STATS, "r");
121 if (fp == NULL) {
122 return -1;
123 }
124
125 char buffer[384];
126 char iface[32];
127 uint32_t idx, cur_uid, set;
128 uint64_t tag, rxBytes, rxPackets, txBytes, txPackets;
129
130 while (fgets(buffer, sizeof(buffer), fp) != NULL) {
131 if (sscanf(buffer,
132 "%" SCNu32 " %31s 0x%" SCNx64 " %u %u %" SCNu64 " %" SCNu64
133 " %" SCNu64 " %" SCNu64 "",
134 &idx, iface, &tag, &cur_uid, &set, &rxBytes, &rxPackets,
135 &txBytes, &txPackets) == 9) {
136 if (uid == cur_uid && tag == 0L) {
137 stats->rxBytes += rxBytes;
138 stats->rxPackets += rxPackets;
139 stats->txBytes += txBytes;
140 stats->txPackets += txPackets;
141 }
142 }
143 }
144
145 if (fclose(fp) != 0) {
146 return -1;
147 }
148 return 0;
149 }
150
getTotalStat(JNIEnv * env,jclass clazz,jint type,jboolean useBpfStats)151 static jlong getTotalStat(JNIEnv* env, jclass clazz, jint type, jboolean useBpfStats) {
152 Stats stats = {};
153
154 if (useBpfStats) {
155 if (bpfGetIfaceStats(NULL, &stats) == 0) {
156 return getStatsType(&stats, (StatsType) type);
157 } else {
158 return UNKNOWN;
159 }
160 }
161
162 if (parseIfaceStats(NULL, &stats) == 0) {
163 return getStatsType(&stats, (StatsType) type);
164 } else {
165 return UNKNOWN;
166 }
167 }
168
getIfaceStat(JNIEnv * env,jclass clazz,jstring iface,jint type,jboolean useBpfStats)169 static jlong getIfaceStat(JNIEnv* env, jclass clazz, jstring iface, jint type,
170 jboolean useBpfStats) {
171 ScopedUtfChars iface8(env, iface);
172 if (iface8.c_str() == NULL) {
173 return UNKNOWN;
174 }
175
176 Stats stats = {};
177
178 if (useBpfStats) {
179 if (bpfGetIfaceStats(iface8.c_str(), &stats) == 0) {
180 return getStatsType(&stats, (StatsType) type);
181 } else {
182 return UNKNOWN;
183 }
184 }
185
186 if (parseIfaceStats(iface8.c_str(), &stats) == 0) {
187 return getStatsType(&stats, (StatsType) type);
188 } else {
189 return UNKNOWN;
190 }
191 }
192
getUidStat(JNIEnv * env,jclass clazz,jint uid,jint type,jboolean useBpfStats)193 static jlong getUidStat(JNIEnv* env, jclass clazz, jint uid, jint type, jboolean useBpfStats) {
194 Stats stats = {};
195
196 if (useBpfStats) {
197 if (bpfGetUidStats(uid, &stats) == 0) {
198 return getStatsType(&stats, (StatsType) type);
199 } else {
200 return UNKNOWN;
201 }
202 }
203
204 if (parseUidStats(uid, &stats) == 0) {
205 return getStatsType(&stats, (StatsType) type);
206 } else {
207 return UNKNOWN;
208 }
209 }
210
211 static const JNINativeMethod gMethods[] = {
212 {"nativeGetTotalStat", "(IZ)J", (void*) getTotalStat},
213 {"nativeGetIfaceStat", "(Ljava/lang/String;IZ)J", (void*) getIfaceStat},
214 {"nativeGetUidStat", "(IIZ)J", (void*) getUidStat},
215 };
216
register_android_server_net_NetworkStatsService(JNIEnv * env)217 int register_android_server_net_NetworkStatsService(JNIEnv* env) {
218 jclass netStatsService = env->FindClass("com/android/server/net/NetworkStatsService");
219 jfieldID rxBytesId = env->GetStaticFieldID(netStatsService, "TYPE_RX_BYTES", "I");
220 jfieldID rxPacketsId = env->GetStaticFieldID(netStatsService, "TYPE_RX_PACKETS", "I");
221 jfieldID txBytesId = env->GetStaticFieldID(netStatsService, "TYPE_TX_BYTES", "I");
222 jfieldID txPacketsId = env->GetStaticFieldID(netStatsService, "TYPE_TX_PACKETS", "I");
223 jfieldID tcpRxPacketsId = env->GetStaticFieldID(netStatsService, "TYPE_TCP_RX_PACKETS", "I");
224 jfieldID tcpTxPacketsId = env->GetStaticFieldID(netStatsService, "TYPE_TCP_TX_PACKETS", "I");
225
226 env->SetStaticIntField(netStatsService, rxBytesId, RX_BYTES);
227 env->SetStaticIntField(netStatsService, rxPacketsId, RX_PACKETS);
228 env->SetStaticIntField(netStatsService, txBytesId, TX_BYTES);
229 env->SetStaticIntField(netStatsService, txPacketsId, TX_PACKETS);
230 env->SetStaticIntField(netStatsService, tcpRxPacketsId, TCP_RX_PACKETS);
231 env->SetStaticIntField(netStatsService, tcpTxPacketsId, TCP_TX_PACKETS);
232
233 return jniRegisterNativeMethods(env, "com/android/server/net/NetworkStatsService", gMethods,
234 NELEM(gMethods));
235 }
236
237 }
238