Jeff Sharkey | 9a2c2a6 | 2013-01-14 16:48:51 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 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 "NetworkStats" |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <android_runtime/AndroidRuntime.h> |
| 24 | #include <cutils/logger.h> |
| 25 | #include <jni.h> |
| 26 | |
| 27 | #include <ScopedUtfChars.h> |
| 28 | #include <ScopedLocalRef.h> |
| 29 | #include <ScopedPrimitiveArray.h> |
| 30 | |
| 31 | #include <utils/Log.h> |
| 32 | #include <utils/misc.h> |
| 33 | #include <utils/Vector.h> |
| 34 | |
| 35 | namespace android { |
| 36 | |
| 37 | static jclass gStringClass; |
| 38 | |
| 39 | static struct { |
| 40 | jfieldID size; |
| 41 | jfieldID iface; |
| 42 | jfieldID uid; |
| 43 | jfieldID set; |
| 44 | jfieldID tag; |
| 45 | jfieldID rxBytes; |
| 46 | jfieldID rxPackets; |
| 47 | jfieldID txBytes; |
| 48 | jfieldID txPackets; |
| 49 | jfieldID operations; |
| 50 | } gNetworkStatsClassInfo; |
| 51 | |
| 52 | struct stats_line { |
| 53 | int32_t idx; |
| 54 | char iface[32]; |
| 55 | int32_t uid; |
| 56 | int32_t set; |
| 57 | int32_t tag; |
| 58 | int64_t rxBytes; |
| 59 | int64_t rxPackets; |
| 60 | int64_t txBytes; |
| 61 | int64_t txPackets; |
| 62 | }; |
| 63 | |
| 64 | static int readNetworkStatsDetail(JNIEnv* env, jclass clazz, jobject stats, |
| 65 | jstring path, jint limitUid) { |
| 66 | ScopedUtfChars path8(env, path); |
| 67 | if (path8.c_str() == NULL) { |
| 68 | return -1; |
| 69 | } |
| 70 | |
| 71 | FILE *fp = fopen(path8.c_str(), "r"); |
| 72 | if (fp == NULL) { |
| 73 | return -1; |
| 74 | } |
| 75 | |
| 76 | Vector<stats_line> lines; |
| 77 | |
| 78 | int lastIdx = 1; |
| 79 | char buffer[384]; |
| 80 | while (fgets(buffer, sizeof(buffer), fp) != NULL) { |
| 81 | stats_line s; |
| 82 | int64_t rawTag; |
| 83 | if (sscanf(buffer, "%d %31s 0x%llx %u %u %llu %llu %llu %llu", &s.idx, |
| 84 | &s.iface, &rawTag, &s.uid, &s.set, &s.rxBytes, &s.rxPackets, |
| 85 | &s.txBytes, &s.txPackets) == 9) { |
| 86 | if (s.idx != lastIdx + 1) { |
| 87 | ALOGE("inconsistent idx=%d after lastIdx=%d", s.idx, lastIdx); |
| 88 | return -1; |
| 89 | } |
| 90 | lastIdx = s.idx; |
| 91 | |
| 92 | s.tag = rawTag >> 32; |
| 93 | lines.push_back(s); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | if (fclose(fp) != 0) { |
| 98 | return -1; |
| 99 | } |
| 100 | |
| 101 | int size = lines.size(); |
| 102 | |
| 103 | ScopedLocalRef<jobjectArray> iface(env, env->NewObjectArray(size, gStringClass, NULL)); |
| 104 | if (iface.get() == NULL) return -1; |
| 105 | ScopedIntArrayRW uid(env, env->NewIntArray(size)); |
| 106 | if (uid.get() == NULL) return -1; |
| 107 | ScopedIntArrayRW set(env, env->NewIntArray(size)); |
| 108 | if (set.get() == NULL) return -1; |
| 109 | ScopedIntArrayRW tag(env, env->NewIntArray(size)); |
| 110 | if (tag.get() == NULL) return -1; |
| 111 | ScopedLongArrayRW rxBytes(env, env->NewLongArray(size)); |
| 112 | if (rxBytes.get() == NULL) return -1; |
| 113 | ScopedLongArrayRW rxPackets(env, env->NewLongArray(size)); |
| 114 | if (rxPackets.get() == NULL) return -1; |
| 115 | ScopedLongArrayRW txBytes(env, env->NewLongArray(size)); |
| 116 | if (txBytes.get() == NULL) return -1; |
| 117 | ScopedLongArrayRW txPackets(env, env->NewLongArray(size)); |
| 118 | if (txPackets.get() == NULL) return -1; |
| 119 | ScopedLongArrayRW operations(env, env->NewLongArray(size)); |
| 120 | if (operations.get() == NULL) return -1; |
| 121 | |
| 122 | for (int i = 0; i < size; i++) { |
| 123 | ScopedLocalRef<jstring> ifaceString(env, env->NewStringUTF(lines[i].iface)); |
| 124 | env->SetObjectArrayElement(iface.get(), i, ifaceString.get()); |
| 125 | |
| 126 | uid[i] = lines[i].uid; |
| 127 | set[i] = lines[i].set; |
| 128 | tag[i] = lines[i].tag; |
| 129 | rxBytes[i] = lines[i].rxBytes; |
| 130 | rxPackets[i] = lines[i].rxPackets; |
| 131 | txBytes[i] = lines[i].txBytes; |
| 132 | txPackets[i] = lines[i].txPackets; |
| 133 | } |
| 134 | |
| 135 | env->SetIntField(stats, gNetworkStatsClassInfo.size, size); |
| 136 | env->SetObjectField(stats, gNetworkStatsClassInfo.iface, iface.get()); |
| 137 | env->SetObjectField(stats, gNetworkStatsClassInfo.uid, uid.getJavaArray()); |
| 138 | env->SetObjectField(stats, gNetworkStatsClassInfo.set, set.getJavaArray()); |
| 139 | env->SetObjectField(stats, gNetworkStatsClassInfo.tag, tag.getJavaArray()); |
| 140 | env->SetObjectField(stats, gNetworkStatsClassInfo.rxBytes, rxBytes.getJavaArray()); |
| 141 | env->SetObjectField(stats, gNetworkStatsClassInfo.rxPackets, rxPackets.getJavaArray()); |
| 142 | env->SetObjectField(stats, gNetworkStatsClassInfo.txBytes, txBytes.getJavaArray()); |
| 143 | env->SetObjectField(stats, gNetworkStatsClassInfo.txPackets, txPackets.getJavaArray()); |
| 144 | env->SetObjectField(stats, gNetworkStatsClassInfo.operations, operations.getJavaArray()); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static jclass findClass(JNIEnv* env, const char* name) { |
| 150 | ScopedLocalRef<jclass> localClass(env, env->FindClass(name)); |
| 151 | jclass result = reinterpret_cast<jclass>(env->NewGlobalRef(localClass.get())); |
| 152 | if (result == NULL) { |
| 153 | ALOGE("failed to find class '%s'", name); |
| 154 | abort(); |
| 155 | } |
| 156 | return result; |
| 157 | } |
| 158 | |
| 159 | static JNINativeMethod gMethods[] = { |
| 160 | { "nativeReadNetworkStatsDetail", |
| 161 | "(Landroid/net/NetworkStats;Ljava/lang/String;I)I", |
| 162 | (void*) readNetworkStatsDetail } |
| 163 | }; |
| 164 | |
| 165 | int register_com_android_internal_net_NetworkStatsFactory(JNIEnv* env) { |
| 166 | int err = AndroidRuntime::registerNativeMethods(env, |
| 167 | "com/android/internal/net/NetworkStatsFactory", gMethods, |
| 168 | NELEM(gMethods)); |
| 169 | |
| 170 | gStringClass = findClass(env, "java/lang/String"); |
| 171 | |
| 172 | jclass clazz = env->FindClass("android/net/NetworkStats"); |
| 173 | gNetworkStatsClassInfo.size = env->GetFieldID(clazz, "size", "I"); |
| 174 | gNetworkStatsClassInfo.iface = env->GetFieldID(clazz, "iface", "[Ljava/lang/String;"); |
| 175 | gNetworkStatsClassInfo.uid = env->GetFieldID(clazz, "uid", "[I"); |
| 176 | gNetworkStatsClassInfo.set = env->GetFieldID(clazz, "set", "[I"); |
| 177 | gNetworkStatsClassInfo.tag = env->GetFieldID(clazz, "tag", "[I"); |
| 178 | gNetworkStatsClassInfo.rxBytes = env->GetFieldID(clazz, "rxBytes", "[J"); |
| 179 | gNetworkStatsClassInfo.rxPackets = env->GetFieldID(clazz, "rxPackets", "[J"); |
| 180 | gNetworkStatsClassInfo.txBytes = env->GetFieldID(clazz, "txBytes", "[J"); |
| 181 | gNetworkStatsClassInfo.txPackets = env->GetFieldID(clazz, "txPackets", "[J"); |
| 182 | gNetworkStatsClassInfo.operations = env->GetFieldID(clazz, "operations", "[J"); |
| 183 | |
| 184 | return err; |
| 185 | } |
| 186 | |
| 187 | } |