120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
#define LOG_TAG "Shadowsocks"
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#include "jni.h"
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#include <android/log.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <cpu-features.h>
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#define LOGI(...) do { __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__); } while(0)
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#define LOGW(...) do { __android_log_print(ANDROID_LOG_WARN, LOG_TAG, __VA_ARGS__); } while(0)
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#define LOGE(...) do { __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__); } while(0)
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jstring Java_com_github_shadowsocks_system_getabi(JNIEnv *env, jobject thiz) {
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AndroidCpuFamily family = android_getCpuFamily();
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uint64_t features = android_getCpuFeatures();
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const char *abi;
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if (family == ANDROID_CPU_FAMILY_X86) {
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abi = "x86";
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} else if (family == ANDROID_CPU_FAMILY_MIPS) {
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abi = "mips";
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} else if (family == ANDROID_CPU_FAMILY_ARM) {
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// if (features & ANDROID_CPU_ARM_FEATURE_ARMv7) {
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abi = "armeabi-v7a";
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// } else {
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// abi = "armeabi";
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// }
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}
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return env->NewStringUTF(abi);
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}
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void Java_com_github_shadowsocks_system_exec(JNIEnv *env, jobject thiz, jstring cmd) {
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const char *str = env->GetStringUTFChars(cmd, 0);
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setenv("LD_LIBRARY_PATH", "/vendor/lib:/system/lib", 1);
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setegid(getgid());
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seteuid(getuid());
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system(str);
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env->ReleaseStringUTFChars(cmd, str);
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}
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static const char *classPathName = "com/github/shadowsocks/System";
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static JNINativeMethod method_table[] = {
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{ "exec", "(Ljava/lang/String;)V",
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(void*) Java_com_github_shadowsocks_system_exec },
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{ "getABI", "()Ljava/lang/String;",
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(void*) Java_com_github_shadowsocks_system_getabi }
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};
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/*
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* Register several native methods for one class.
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*/
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static int registerNativeMethods(JNIEnv* env, const char* className,
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JNINativeMethod* gMethods, int numMethods)
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{
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jclass clazz;
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clazz = env->FindClass(className);
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if (clazz == NULL) {
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LOGE("Native registration unable to find class '%s'", className);
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return JNI_FALSE;
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}
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if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
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LOGE("RegisterNatives failed for '%s'", className);
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return JNI_FALSE;
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}
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return JNI_TRUE;
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}
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/*
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* Register native methods for all classes we know about.
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*
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* returns JNI_TRUE on success.
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*/
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static int registerNatives(JNIEnv* env)
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{
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if (!registerNativeMethods(env, classPathName, method_table,
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sizeof(method_table) / sizeof(method_table[0]))) {
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return JNI_FALSE;
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}
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return JNI_TRUE;
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}
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/*
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* This is called by the VM when the shared library is first loaded.
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*/
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typedef union {
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JNIEnv* env;
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void* venv;
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} UnionJNIEnvToVoid;
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jint JNI_OnLoad(JavaVM* vm, void* reserved) {
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UnionJNIEnvToVoid uenv;
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uenv.venv = NULL;
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jint result = -1;
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JNIEnv* env = NULL;
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LOGI("JNI_OnLoad");
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if (vm->GetEnv(&uenv.venv, JNI_VERSION_1_4) != JNI_OK) {
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LOGE("ERROR: GetEnv failed");
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goto bail;
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}
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env = uenv.env;
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if (registerNatives(env) != JNI_TRUE) {
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LOGE("ERROR: registerNatives failed");
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goto bail;
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}
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result = JNI_VERSION_1_4;
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bail:
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return result;
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}
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