Rename net_utils_device_common_timerfdjni to serviceconnectivityjni
Test: builds and boots
Change-Id: I432da644ab6d212df736913089ff3b52d286ea0e
diff --git a/staticlibs/native/serviceconnectivityjni/Android.bp b/staticlibs/native/serviceconnectivityjni/Android.bp
new file mode 100644
index 0000000..18246dd
--- /dev/null
+++ b/staticlibs/native/serviceconnectivityjni/Android.bp
@@ -0,0 +1,49 @@
+// Copyright (C) 2024 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.
+
+package {
+ default_team: "trendy_team_fwk_core_networking",
+ default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library_static {
+ name: "libserviceconnectivityjni",
+ srcs: [
+ "com_android_net_module_util_ServiceConnectivityJni.cpp",
+ ],
+ header_libs: [
+ "bpf_headers",
+ "jni_headers",
+ "libbase_headers",
+ ],
+ shared_libs: [
+ "liblog",
+ "libnativehelper_compat_libc++",
+ ],
+ stl: "libc++_static",
+ cflags: [
+ "-Wall",
+ "-Werror",
+ "-Wno-unused-parameter",
+ ],
+ sdk_version: "current",
+ min_sdk_version: "30",
+ apex_available: [
+ "com.android.tethering",
+ "//apex_available:platform",
+ ],
+ visibility: [
+ "//packages/modules/Connectivity:__subpackages__",
+ ],
+}
diff --git a/staticlibs/native/serviceconnectivityjni/com_android_net_module_util_ServiceConnectivityJni.cpp b/staticlibs/native/serviceconnectivityjni/com_android_net_module_util_ServiceConnectivityJni.cpp
new file mode 100644
index 0000000..150f84e
--- /dev/null
+++ b/staticlibs/native/serviceconnectivityjni/com_android_net_module_util_ServiceConnectivityJni.cpp
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <jni.h>
+#include <linux/if.h>
+#include <linux/if_tun.h>
+#include <linux/ipv6_route.h>
+#include <linux/route.h>
+#include <netinet/in.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/timerfd.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <android-base/unique_fd.h>
+#include <bpf/KernelUtils.h>
+#include <nativehelper/JNIHelp.h>
+#include <nativehelper/scoped_utf_chars.h>
+
+#define MSEC_PER_SEC 1000
+#define NSEC_PER_MSEC 1000000
+
+#ifndef IFF_NO_CARRIER
+#define IFF_NO_CARRIER 0x0040
+#endif
+
+namespace android {
+
+static jint
+com_android_net_module_util_ServiceConnectivityJni_createTimerFd(JNIEnv *env,
+ jclass clazz) {
+ int tfd;
+ tfd = timerfd_create(CLOCK_BOOTTIME, 0);
+ if (tfd == -1) {
+ jniThrowErrnoException(env, "createTimerFd", tfd);
+ }
+ return tfd;
+}
+
+static void
+com_android_net_module_util_ServiceConnectivityJni_setTime(JNIEnv *env, jclass clazz,
+ jint tfd, jlong milliseconds) {
+ struct itimerspec new_value;
+ new_value.it_value.tv_sec = milliseconds / MSEC_PER_SEC;
+ new_value.it_value.tv_nsec = (milliseconds % MSEC_PER_SEC) * NSEC_PER_MSEC;
+ // Set the interval time to 0 because it's designed for repeated timer expirations after the
+ // initial expiration, which doesn't fit the current usage.
+ new_value.it_interval.tv_sec = 0;
+ new_value.it_interval.tv_nsec = 0;
+
+ int ret = timerfd_settime(tfd, 0, &new_value, NULL);
+ if (ret == -1) {
+ jniThrowErrnoException(env, "setTime", ret);
+ }
+}
+
+static void throwException(JNIEnv* env, int error, const char* action, const char* iface) {
+ const std::string& msg = "Error: " + std::string(action) + " " + std::string(iface) + ": "
+ + std::string(strerror(error));
+ jniThrowException(env, "java/lang/IllegalStateException", msg.c_str());
+}
+
+// enable or disable carrier on tun / tap interface.
+static void setTunTapCarrierEnabledImpl(JNIEnv* env, const char* iface, int tunFd, bool enabled) {
+ uint32_t carrierOn = enabled;
+ if (ioctl(tunFd, TUNSETCARRIER, &carrierOn)) {
+ throwException(env, errno, "set carrier", iface);
+ }
+}
+
+static int createTunTapImpl(JNIEnv* env, bool isTun, bool hasCarrier, bool setIffMulticast,
+ 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;
+ if (!hasCarrier) {
+ // Using IFF_NO_CARRIER is supported starting in kernel version >= 6.0
+ // Up until then, unsupported flags are ignored.
+ if (!bpf::isAtLeastKernelVersion(6, 0, 0)) {
+ throwException(env, EOPNOTSUPP, "IFF_NO_CARRIER not supported", ifr.ifr_name);
+ return -1;
+ }
+ ifr.ifr_flags |= IFF_NO_CARRIER;
+ }
+ strlcpy(ifr.ifr_name, iface, IFNAMSIZ);
+ if (ioctl(tun.get(), TUNSETIFF, &ifr)) {
+ throwException(env, errno, "allocating", ifr.ifr_name);
+ return -1;
+ }
+
+ // Mark some TAP interfaces as supporting multicast
+ if (setIffMulticast && !isTun) {
+ base::unique_fd inet6CtrlSock(socket(AF_INET6, SOCK_DGRAM, 0));
+ ifr.ifr_flags = IFF_MULTICAST;
+
+ if (ioctl(inet6CtrlSock.get(), SIOCSIFFLAGS, &ifr)) {
+ throwException(env, errno, "set IFF_MULTICAST", ifr.ifr_name);
+ return -1;
+ }
+ }
+
+ return tun.release();
+}
+
+static void bringUpInterfaceImpl(JNIEnv* env, const char* iface) {
+ // Activate interface using an unconnected datagram socket.
+ base::unique_fd inet6CtrlSock(socket(AF_INET6, SOCK_DGRAM, 0));
+
+ ifreq ifr{};
+ strlcpy(ifr.ifr_name, iface, IFNAMSIZ);
+ if (ioctl(inet6CtrlSock.get(), SIOCGIFFLAGS, &ifr)) {
+ throwException(env, errno, "read flags", iface);
+ return;
+ }
+ ifr.ifr_flags |= IFF_UP;
+ if (ioctl(inet6CtrlSock.get(), SIOCSIFFLAGS, &ifr)) {
+ throwException(env, errno, "set IFF_UP", iface);
+ return;
+ }
+}
+
+//------------------------------------------------------------------------------
+
+static void setTunTapCarrierEnabled(JNIEnv* env, jclass /* clazz */, jstring
+ jIface, jint tunFd, jboolean enabled) {
+ ScopedUtfChars iface(env, jIface);
+ if (!iface.c_str()) {
+ jniThrowNullPointerException(env, "iface");
+ return;
+ }
+ setTunTapCarrierEnabledImpl(env, iface.c_str(), tunFd, enabled);
+}
+
+static jint createTunTap(JNIEnv* env, jclass /* clazz */, jboolean isTun,
+ jboolean hasCarrier, jboolean setIffMulticast, jstring jIface) {
+ ScopedUtfChars iface(env, jIface);
+ if (!iface.c_str()) {
+ jniThrowNullPointerException(env, "iface");
+ return -1;
+ }
+
+ return createTunTapImpl(env, isTun, hasCarrier, setIffMulticast, iface.c_str());
+}
+
+static void bringUpInterface(JNIEnv* env, jclass /* clazz */, jstring jIface) {
+ ScopedUtfChars iface(env, jIface);
+ if (!iface.c_str()) {
+ jniThrowNullPointerException(env, "iface");
+ return;
+ }
+ bringUpInterfaceImpl(env, iface.c_str());
+}
+
+//------------------------------------------------------------------------------
+
+/*
+ * JNI registration.
+ */
+static const JNINativeMethod gMethods[] = {
+ /* name, signature, funcPtr */
+ {"createTimerFd", "()I",
+ (void *)com_android_net_module_util_ServiceConnectivityJni_createTimerFd},
+ {"setTime", "(IJ)V",
+ (void *)com_android_net_module_util_ServiceConnectivityJni_setTime},
+ {"nativeSetTunTapCarrierEnabled", "(Ljava/lang/String;IZ)V", (void*)setTunTapCarrierEnabled},
+ {"nativeCreateTunTap", "(ZZZLjava/lang/String;)I", (void*)createTunTap},
+ {"nativeBringUpInterface", "(Ljava/lang/String;)V", (void*)bringUpInterface},
+};
+
+int register_com_android_net_module_util_ServiceConnectivityJni(JNIEnv *env,
+ char const *class_name) {
+ return jniRegisterNativeMethods(env, class_name, gMethods, NELEM(gMethods));
+}
+
+}; // namespace android