Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 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 <sys/stat.h> |
| 23 | #include <sys/types.h> |
| 24 | |
| 25 | #include <android_runtime/AndroidRuntime.h> |
| 26 | #include <cutils/logger.h> |
| 27 | #include <jni.h> |
Elliott Hughes | f17b971 | 2011-04-12 16:12:09 -0700 | [diff] [blame] | 28 | #include <ScopedUtfChars.h> |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 29 | #include <utils/misc.h> |
| 30 | #include <utils/Log.h> |
| 31 | |
| 32 | namespace android { |
| 33 | |
Ashish Sharma | c39c1d4 | 2011-01-27 15:52:38 -0800 | [diff] [blame] | 34 | enum Tx_Rx { |
| 35 | TX, |
| 36 | RX |
| 37 | }; |
| 38 | |
| 39 | enum Tcp_Udp { |
| 40 | TCP, |
| 41 | UDP, |
| 42 | TCP_AND_UDP |
| 43 | }; |
| 44 | |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 45 | // Returns an ASCII decimal number read from the specified file, -1 on error. |
| 46 | static jlong readNumber(char const* filename) { |
| 47 | char buf[80]; |
| 48 | int fd = open(filename, O_RDONLY); |
| 49 | if (fd < 0) { |
| 50 | if (errno != ENOENT) LOGE("Can't open %s: %s", filename, strerror(errno)); |
| 51 | return -1; |
| 52 | } |
| 53 | |
| 54 | int len = read(fd, buf, sizeof(buf) - 1); |
| 55 | if (len < 0) { |
| 56 | LOGE("Can't read %s: %s", filename, strerror(errno)); |
| 57 | close(fd); |
| 58 | return -1; |
| 59 | } |
| 60 | |
| 61 | close(fd); |
| 62 | buf[len] = '\0'; |
| 63 | return atoll(buf); |
| 64 | } |
| 65 | |
Kazuhiro Ondo | 64ba5ea | 2011-07-05 16:12:10 -0500 | [diff] [blame] | 66 | static const char* mobile_iface_list[] = { |
| 67 | "rmnet0", |
| 68 | "rmnet1", |
| 69 | "rmnet2", |
| 70 | "rmnet3", |
| 71 | "ppp0", |
| 72 | 0 |
| 73 | }; |
| 74 | |
| 75 | static jlong getAll(const char** iface_list, const char* what) { |
| 76 | |
| 77 | char filename[80]; |
| 78 | int idx = 0; |
| 79 | bool supported = false; |
| 80 | jlong total = 0; |
| 81 | while (iface_list[idx] != 0) { |
| 82 | |
| 83 | snprintf(filename, sizeof(filename), "/sys/class/net/%s/statistics/%s", |
| 84 | iface_list[idx], what); |
| 85 | jlong number = readNumber(filename); |
| 86 | if (number >= 0) { |
| 87 | supported = true; |
| 88 | total += number; |
| 89 | } |
| 90 | idx++; |
| 91 | } |
| 92 | if (supported) return total; |
| 93 | |
| 94 | return -1; |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | // Returns the sum of numbers from the specified path under /sys/class/net/*, |
| 98 | // -1 if no such file exists. |
| 99 | static jlong readTotal(char const* suffix) { |
| 100 | char filename[PATH_MAX] = "/sys/class/net/"; |
| 101 | DIR *dir = opendir(filename); |
| 102 | if (dir == NULL) { |
| 103 | LOGE("Can't list %s: %s", filename, strerror(errno)); |
| 104 | return -1; |
| 105 | } |
| 106 | |
| 107 | int len = strlen(filename); |
| 108 | jlong total = -1; |
| 109 | while (struct dirent *entry = readdir(dir)) { |
| 110 | // Skip ., .., and localhost interfaces. |
| 111 | if (entry->d_name[0] != '.' && strncmp(entry->d_name, "lo", 2) != 0) { |
| 112 | strlcpy(filename + len, entry->d_name, sizeof(filename) - len); |
| 113 | strlcat(filename, suffix, sizeof(filename)); |
| 114 | jlong num = readNumber(filename); |
| 115 | if (num >= 0) total = total < 0 ? num : total + num; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | closedir(dir); |
| 120 | return total; |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 121 | } |
| 122 | |
| 123 | // Mobile stats get accessed a lot more often than total stats. |
| 124 | // Note the individual files can come and go at runtime, so we check |
| 125 | // each file every time (rather than caching which ones exist). |
| 126 | |
| 127 | static jlong getMobileTxPackets(JNIEnv* env, jobject clazz) { |
Kazuhiro Ondo | 64ba5ea | 2011-07-05 16:12:10 -0500 | [diff] [blame] | 128 | return getAll(mobile_iface_list, "tx_packets"); |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | static jlong getMobileRxPackets(JNIEnv* env, jobject clazz) { |
Kazuhiro Ondo | 64ba5ea | 2011-07-05 16:12:10 -0500 | [diff] [blame] | 132 | return getAll(mobile_iface_list, "rx_packets"); |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | static jlong getMobileTxBytes(JNIEnv* env, jobject clazz) { |
Kazuhiro Ondo | 64ba5ea | 2011-07-05 16:12:10 -0500 | [diff] [blame] | 136 | return getAll(mobile_iface_list, "tx_bytes"); |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | static jlong getMobileRxBytes(JNIEnv* env, jobject clazz) { |
Kazuhiro Ondo | 64ba5ea | 2011-07-05 16:12:10 -0500 | [diff] [blame] | 140 | return getAll(mobile_iface_list, "rx_bytes"); |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 141 | } |
| 142 | |
Elliott Hughes | f17b971 | 2011-04-12 16:12:09 -0700 | [diff] [blame] | 143 | static jlong getData(JNIEnv* env, const char* what, jstring javaInterface) { |
| 144 | ScopedUtfChars interface(env, javaInterface); |
| 145 | if (interface.c_str() == NULL) { |
| 146 | return -1; |
| 147 | } |
| 148 | |
Irfan Sheriff | 227bec4 | 2011-02-15 19:30:27 -0800 | [diff] [blame] | 149 | char filename[80]; |
Elliott Hughes | f17b971 | 2011-04-12 16:12:09 -0700 | [diff] [blame] | 150 | snprintf(filename, sizeof(filename), "/sys/class/net/%s/statistics/%s", interface.c_str(), what); |
Irfan Sheriff | 227bec4 | 2011-02-15 19:30:27 -0800 | [diff] [blame] | 151 | return readNumber(filename); |
| 152 | } |
| 153 | |
| 154 | static jlong getTxPackets(JNIEnv* env, jobject clazz, jstring interface) { |
| 155 | return getData(env, "tx_packets", interface); |
| 156 | } |
| 157 | |
| 158 | static jlong getRxPackets(JNIEnv* env, jobject clazz, jstring interface) { |
| 159 | return getData(env, "rx_packets", interface); |
| 160 | } |
| 161 | |
| 162 | static jlong getTxBytes(JNIEnv* env, jobject clazz, jstring interface) { |
| 163 | return getData(env, "tx_bytes", interface); |
| 164 | } |
| 165 | |
| 166 | static jlong getRxBytes(JNIEnv* env, jobject clazz, jstring interface) { |
| 167 | return getData(env, "rx_bytes", interface); |
| 168 | } |
| 169 | |
| 170 | |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 171 | // Total stats are read less often, so we're willing to put up |
| 172 | // with listing the directory and concatenating filenames. |
| 173 | |
| 174 | static jlong getTotalTxPackets(JNIEnv* env, jobject clazz) { |
| 175 | return readTotal("/statistics/tx_packets"); |
| 176 | } |
| 177 | |
| 178 | static jlong getTotalRxPackets(JNIEnv* env, jobject clazz) { |
| 179 | return readTotal("/statistics/rx_packets"); |
| 180 | } |
| 181 | |
| 182 | static jlong getTotalTxBytes(JNIEnv* env, jobject clazz) { |
| 183 | return readTotal("/statistics/tx_bytes"); |
| 184 | } |
| 185 | |
| 186 | static jlong getTotalRxBytes(JNIEnv* env, jobject clazz) { |
| 187 | return readTotal("/statistics/rx_bytes"); |
| 188 | } |
| 189 | |
| 190 | // Per-UID stats require reading from a constructed filename. |
| 191 | |
Ashish Sharma | c39c1d4 | 2011-01-27 15:52:38 -0800 | [diff] [blame] | 192 | static jlong getUidBytes(JNIEnv* env, jobject clazz, jint uid, |
| 193 | enum Tx_Rx tx_or_rx, enum Tcp_Udp tcp_or_udp) { |
| 194 | char tcp_filename[80], udp_filename[80]; |
| 195 | jlong tcp_bytes = -1, udp_bytes = -1, total_bytes = -1; |
| 196 | |
| 197 | switch (tx_or_rx) { |
| 198 | case TX: |
| 199 | sprintf(tcp_filename, "/proc/uid_stat/%d/tcp_snd", uid); |
| 200 | sprintf(udp_filename, "/proc/uid_stat/%d/udp_snd", uid); |
| 201 | break; |
| 202 | case RX: |
| 203 | sprintf(tcp_filename, "/proc/uid_stat/%d/tcp_rcv", uid); |
| 204 | sprintf(udp_filename, "/proc/uid_stat/%d/udp_rcv", uid); |
| 205 | break; |
| 206 | default: |
| 207 | return -1; |
| 208 | } |
| 209 | |
| 210 | switch (tcp_or_udp) { |
| 211 | case TCP: |
| 212 | tcp_bytes = readNumber(tcp_filename); |
| 213 | total_bytes = (tcp_bytes >= 0) ? tcp_bytes : -1; |
| 214 | break; |
| 215 | case UDP: |
| 216 | udp_bytes = readNumber(udp_filename); |
| 217 | total_bytes = (udp_bytes >= 0) ? udp_bytes : -1; |
| 218 | break; |
| 219 | case TCP_AND_UDP: |
| 220 | tcp_bytes = readNumber(tcp_filename); |
| 221 | total_bytes += (tcp_bytes >= 0 ? tcp_bytes : 0); |
| 222 | |
| 223 | udp_bytes = readNumber(udp_filename); |
| 224 | total_bytes += (udp_bytes >= 0 ? udp_bytes : 0); |
| 225 | break; |
| 226 | default: |
| 227 | return -1; |
| 228 | } |
| 229 | |
| 230 | return total_bytes; |
| 231 | } |
| 232 | |
| 233 | static jlong getUidPkts(JNIEnv* env, jobject clazz, jint uid, |
| 234 | enum Tx_Rx tx_or_rx, enum Tcp_Udp tcp_or_udp) { |
| 235 | char tcp_filename[80], udp_filename[80]; |
| 236 | jlong tcp_pkts = -1, udp_pkts = -1, total_pkts = -1; |
| 237 | |
| 238 | switch (tx_or_rx) { |
| 239 | case TX: |
| 240 | sprintf(tcp_filename, "/proc/uid_stat/%d/tcp_snd_pkt", uid); |
| 241 | sprintf(udp_filename, "/proc/uid_stat/%d/udp_snd_pkt", uid); |
| 242 | break; |
| 243 | case RX: |
| 244 | sprintf(tcp_filename, "/proc/uid_stat/%d/tcp_rcv_pkt", uid); |
| 245 | sprintf(udp_filename, "/proc/uid_stat/%d/udp_rcv_pkt", uid); |
| 246 | break; |
| 247 | default: |
| 248 | return -1; |
| 249 | } |
| 250 | |
| 251 | switch (tcp_or_udp) { |
| 252 | case TCP: |
| 253 | tcp_pkts = readNumber(tcp_filename); |
| 254 | total_pkts = (tcp_pkts >= 0) ? tcp_pkts : -1; |
| 255 | break; |
| 256 | case UDP: |
| 257 | udp_pkts = readNumber(udp_filename); |
| 258 | total_pkts = (udp_pkts >= 0) ? udp_pkts : -1; |
| 259 | break; |
| 260 | case TCP_AND_UDP: |
| 261 | tcp_pkts = readNumber(tcp_filename); |
| 262 | total_pkts += (tcp_pkts >= 0 ? tcp_pkts : 0); |
| 263 | |
| 264 | udp_pkts = readNumber(udp_filename); |
| 265 | total_pkts += (udp_pkts >= 0 ? udp_pkts : 0); |
| 266 | break; |
| 267 | default: |
| 268 | return -1; |
| 269 | } |
| 270 | |
| 271 | return total_pkts; |
| 272 | } |
| 273 | |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 274 | static jlong getUidRxBytes(JNIEnv* env, jobject clazz, jint uid) { |
Ashish Sharma | c39c1d4 | 2011-01-27 15:52:38 -0800 | [diff] [blame] | 275 | return getUidBytes(env, clazz, uid, RX, TCP_AND_UDP); |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | static jlong getUidTxBytes(JNIEnv* env, jobject clazz, jint uid) { |
Ashish Sharma | c39c1d4 | 2011-01-27 15:52:38 -0800 | [diff] [blame] | 279 | return getUidBytes(env, clazz, uid, TX, TCP_AND_UDP); |
| 280 | } |
| 281 | |
| 282 | /* TCP Segments + UDP Packets */ |
| 283 | static jlong getUidTxPackets(JNIEnv* env, jobject clazz, jint uid) { |
| 284 | return getUidPkts(env, clazz, uid, TX, TCP_AND_UDP); |
| 285 | } |
| 286 | |
| 287 | /* TCP Segments + UDP Packets */ |
| 288 | static jlong getUidRxPackets(JNIEnv* env, jobject clazz, jint uid) { |
| 289 | return getUidPkts(env, clazz, uid, RX, TCP_AND_UDP); |
| 290 | } |
| 291 | |
| 292 | static jlong getUidTcpTxBytes(JNIEnv* env, jobject clazz, jint uid) { |
| 293 | return getUidBytes(env, clazz, uid, TX, TCP); |
| 294 | } |
| 295 | |
| 296 | static jlong getUidTcpRxBytes(JNIEnv* env, jobject clazz, jint uid) { |
| 297 | return getUidBytes(env, clazz, uid, RX, TCP); |
| 298 | } |
| 299 | |
| 300 | static jlong getUidUdpTxBytes(JNIEnv* env, jobject clazz, jint uid) { |
| 301 | return getUidBytes(env, clazz, uid, TX, UDP); |
| 302 | } |
| 303 | |
| 304 | static jlong getUidUdpRxBytes(JNIEnv* env, jobject clazz, jint uid) { |
| 305 | return getUidBytes(env, clazz, uid, RX, UDP); |
| 306 | } |
| 307 | |
| 308 | static jlong getUidTcpTxSegments(JNIEnv* env, jobject clazz, jint uid) { |
| 309 | return getUidPkts(env, clazz, uid, TX, TCP); |
| 310 | } |
| 311 | |
| 312 | static jlong getUidTcpRxSegments(JNIEnv* env, jobject clazz, jint uid) { |
| 313 | return getUidPkts(env, clazz, uid, RX, TCP); |
| 314 | } |
| 315 | |
| 316 | static jlong getUidUdpTxPackets(JNIEnv* env, jobject clazz, jint uid) { |
| 317 | return getUidPkts(env, clazz, uid, TX, UDP); |
| 318 | } |
| 319 | |
| 320 | static jlong getUidUdpRxPackets(JNIEnv* env, jobject clazz, jint uid) { |
| 321 | return getUidPkts(env, clazz, uid, RX, UDP); |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | static JNINativeMethod gMethods[] = { |
| 325 | {"getMobileTxPackets", "()J", (void*) getMobileTxPackets}, |
| 326 | {"getMobileRxPackets", "()J", (void*) getMobileRxPackets}, |
| 327 | {"getMobileTxBytes", "()J", (void*) getMobileTxBytes}, |
| 328 | {"getMobileRxBytes", "()J", (void*) getMobileRxBytes}, |
Irfan Sheriff | 227bec4 | 2011-02-15 19:30:27 -0800 | [diff] [blame] | 329 | {"getTxPackets", "(Ljava/lang/String;)J", (void*) getTxPackets}, |
| 330 | {"getRxPackets", "(Ljava/lang/String;)J", (void*) getRxPackets}, |
| 331 | {"getTxBytes", "(Ljava/lang/String;)J", (void*) getTxBytes}, |
| 332 | {"getRxBytes", "(Ljava/lang/String;)J", (void*) getRxBytes}, |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 333 | {"getTotalTxPackets", "()J", (void*) getTotalTxPackets}, |
| 334 | {"getTotalRxPackets", "()J", (void*) getTotalRxPackets}, |
| 335 | {"getTotalTxBytes", "()J", (void*) getTotalTxBytes}, |
| 336 | {"getTotalRxBytes", "()J", (void*) getTotalRxBytes}, |
Ashish Sharma | c39c1d4 | 2011-01-27 15:52:38 -0800 | [diff] [blame] | 337 | |
| 338 | /* Per-UID Stats */ |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 339 | {"getUidTxBytes", "(I)J", (void*) getUidTxBytes}, |
| 340 | {"getUidRxBytes", "(I)J", (void*) getUidRxBytes}, |
Ashish Sharma | c39c1d4 | 2011-01-27 15:52:38 -0800 | [diff] [blame] | 341 | {"getUidTxPackets", "(I)J", (void*) getUidTxPackets}, |
| 342 | {"getUidRxPackets", "(I)J", (void*) getUidRxPackets}, |
| 343 | |
| 344 | {"getUidTcpTxBytes", "(I)J", (void*) getUidTcpTxBytes}, |
| 345 | {"getUidTcpRxBytes", "(I)J", (void*) getUidTcpRxBytes}, |
| 346 | {"getUidUdpTxBytes", "(I)J", (void*) getUidUdpTxBytes}, |
| 347 | {"getUidUdpRxBytes", "(I)J", (void*) getUidUdpRxBytes}, |
| 348 | |
| 349 | {"getUidTcpTxSegments", "(I)J", (void*) getUidTcpTxSegments}, |
| 350 | {"getUidTcpRxSegments", "(I)J", (void*) getUidTcpRxSegments}, |
| 351 | {"getUidUdpTxPackets", "(I)J", (void*) getUidUdpTxPackets}, |
| 352 | {"getUidUdpRxPackets", "(I)J", (void*) getUidUdpRxPackets}, |
Dan Egnor | 2b4abcd | 2010-04-07 17:30:50 -0700 | [diff] [blame] | 353 | }; |
| 354 | |
| 355 | int register_android_net_TrafficStats(JNIEnv* env) { |
| 356 | return AndroidRuntime::registerNativeMethods(env, "android/net/TrafficStats", |
| 357 | gMethods, NELEM(gMethods)); |
| 358 | } |
| 359 | |
| 360 | } |