| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_NDEBUG 0 |
| |
| #define LOG_TAG "TestNetworkServiceJni" |
| |
| #include <arpa/inet.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <linux/if.h> |
| #include <linux/if_tun.h> |
| #include <linux/ipv6_route.h> |
| #include <linux/route.h> |
| #include <netinet/in.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #include <log/log.h> |
| |
| #include "netutils/ifc.h" |
| |
| #include "jni.h" |
| #include <android-base/stringprintf.h> |
| #include <android-base/unique_fd.h> |
| #include <nativehelper/JNIHelp.h> |
| #include <nativehelper/ScopedUtfChars.h> |
| |
| namespace android { |
| |
| //------------------------------------------------------------------------------ |
| |
| static void throwException(JNIEnv* env, int error, const char* action, const char* iface) { |
| const std::string& msg = |
| android::base::StringPrintf("Error %s %s: %s", action, iface, strerror(error)); |
| |
| jniThrowException(env, "java/lang/IllegalStateException", msg.c_str()); |
| } |
| |
| static int createTunTapInterface(JNIEnv* env, bool isTun, const char* iface) { |
| base::unique_fd tun(open("/dev/tun", O_RDWR | O_NONBLOCK)); |
| ifreq ifr{}; |
| |
| // Allocate interface. |
| ifr.ifr_flags = (isTun ? IFF_TUN : IFF_TAP) | IFF_NO_PI; |
| strlcpy(ifr.ifr_name, iface, IFNAMSIZ); |
| if (ioctl(tun.get(), TUNSETIFF, &ifr)) { |
| throwException(env, errno, "allocating", ifr.ifr_name); |
| return -1; |
| } |
| |
| // Activate interface using an unconnected datagram socket. |
| base::unique_fd inet6CtrlSock(socket(AF_INET6, SOCK_DGRAM, 0)); |
| ifr.ifr_flags = IFF_UP; |
| |
| if (ioctl(inet6CtrlSock.get(), SIOCSIFFLAGS, &ifr)) { |
| throwException(env, errno, "activating", ifr.ifr_name); |
| return -1; |
| } |
| |
| return tun.release(); |
| } |
| |
| //------------------------------------------------------------------------------ |
| |
| static jint create(JNIEnv* env, jobject /* thiz */, jboolean isTun, jstring jIface) { |
| ScopedUtfChars iface(env, jIface); |
| if (!iface.c_str()) { |
| jniThrowNullPointerException(env, "iface"); |
| return -1; |
| } |
| |
| int tun = createTunTapInterface(env, isTun, iface.c_str()); |
| |
| // Any exceptions will be thrown from the createTunTapInterface call |
| return tun; |
| } |
| |
| //------------------------------------------------------------------------------ |
| |
| static const JNINativeMethod gMethods[] = { |
| {"jniCreateTunTap", "(ZLjava/lang/String;)I", (void*)create}, |
| }; |
| |
| int register_android_server_TestNetworkService(JNIEnv* env) { |
| return jniRegisterNativeMethods(env, "com/android/server/TestNetworkService", gMethods, |
| NELEM(gMethods)); |
| } |
| |
| }; // namespace android |