blob: 090659356bb68d2b57fc48dab30c7548b0d24546 [file] [log] [blame]
Jeff Sharkey9a2c2a62013-01-14 16:48:51 -08001/*
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
35namespace android {
36
37static jclass gStringClass;
38
39static 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
52struct 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
64static 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
149static 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
159static JNINativeMethod gMethods[] = {
160 { "nativeReadNetworkStatsDetail",
161 "(Landroid/net/NetworkStats;Ljava/lang/String;I)I",
162 (void*) readNetworkStatsDetail }
163};
164
165int 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}