| /* |
| * Copyright 2008, 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_TAG "NetUtils" |
| |
| #include "jni.h" |
| #include <utils/misc.h> |
| #include <android_runtime/AndroidRuntime.h> |
| #include <utils/Log.h> |
| #include <arpa/inet.h> |
| #include <cutils/properties.h> |
| |
| extern "C" { |
| int ifc_enable(const char *ifname); |
| int ifc_disable(const char *ifname); |
| int ifc_reset_connections(const char *ifname, int reset_mask); |
| |
| int dhcp_do_request(const char *ifname, |
| const char *ipaddr, |
| const char *gateway, |
| uint32_t *prefixLength, |
| const char *dns1, |
| const char *dns2, |
| const char *server, |
| uint32_t *lease); |
| |
| int dhcp_do_request_renew(const char *ifname, |
| const char *ipaddr, |
| const char *gateway, |
| uint32_t *prefixLength, |
| const char *dns1, |
| const char *dns2, |
| const char *server, |
| uint32_t *lease); |
| |
| int dhcp_stop(const char *ifname); |
| int dhcp_release_lease(const char *ifname); |
| char *dhcp_get_errmsg(); |
| } |
| |
| #define NETUTILS_PKG_NAME "android/net/NetworkUtils" |
| |
| namespace android { |
| |
| /* |
| * The following remembers the jfieldID's of the fields |
| * of the DhcpInfo Java object, so that we don't have |
| * to look them up every time. |
| */ |
| static struct fieldIds { |
| jmethodID constructorId; |
| jfieldID ipaddress; |
| jfieldID prefixLength; |
| jfieldID dns1; |
| jfieldID dns2; |
| jfieldID serverAddress; |
| jfieldID leaseDuration; |
| } dhcpInfoInternalFieldIds; |
| |
| static jint android_net_utils_enableInterface(JNIEnv* env, jobject clazz, jstring ifname) |
| { |
| int result; |
| |
| const char *nameStr = env->GetStringUTFChars(ifname, NULL); |
| result = ::ifc_enable(nameStr); |
| env->ReleaseStringUTFChars(ifname, nameStr); |
| return (jint)result; |
| } |
| |
| static jint android_net_utils_disableInterface(JNIEnv* env, jobject clazz, jstring ifname) |
| { |
| int result; |
| |
| const char *nameStr = env->GetStringUTFChars(ifname, NULL); |
| result = ::ifc_disable(nameStr); |
| env->ReleaseStringUTFChars(ifname, nameStr); |
| return (jint)result; |
| } |
| |
| static jint android_net_utils_resetConnections(JNIEnv* env, jobject clazz, |
| jstring ifname, jint mask) |
| { |
| int result; |
| |
| const char *nameStr = env->GetStringUTFChars(ifname, NULL); |
| |
| LOGD("android_net_utils_resetConnections in env=%p clazz=%p iface=%s mask=0x%x\n", |
| env, clazz, nameStr, mask); |
| |
| result = ::ifc_reset_connections(nameStr, mask); |
| env->ReleaseStringUTFChars(ifname, nameStr); |
| return (jint)result; |
| } |
| |
| static jboolean android_net_utils_runDhcpCommon(JNIEnv* env, jobject clazz, jstring ifname, |
| jobject info, bool renew) |
| { |
| int result; |
| char ipaddr[PROPERTY_VALUE_MAX]; |
| uint32_t prefixLength; |
| char gateway[PROPERTY_VALUE_MAX]; |
| char dns1[PROPERTY_VALUE_MAX]; |
| char dns2[PROPERTY_VALUE_MAX]; |
| char server[PROPERTY_VALUE_MAX]; |
| uint32_t lease; |
| |
| const char *nameStr = env->GetStringUTFChars(ifname, NULL); |
| if (nameStr == NULL) return (jboolean)false; |
| |
| if (renew) { |
| result = ::dhcp_do_request_renew(nameStr, ipaddr, gateway, &prefixLength, |
| dns1, dns2, server, &lease); |
| } else { |
| result = ::dhcp_do_request(nameStr, ipaddr, gateway, &prefixLength, |
| dns1, dns2, server, &lease); |
| } |
| |
| env->ReleaseStringUTFChars(ifname, nameStr); |
| if (result == 0) { |
| env->SetObjectField(info, dhcpInfoInternalFieldIds.ipaddress, env->NewStringUTF(ipaddr)); |
| |
| // set the gateway |
| jclass cls = env->FindClass("java/net/InetAddress"); |
| jmethodID method = env->GetStaticMethodID(cls, "getByName", |
| "(Ljava/lang/String;)Ljava/net/InetAddress;"); |
| jvalue args[1]; |
| args[0].l = env->NewStringUTF(gateway); |
| jobject inetAddressObject = env->CallStaticObjectMethodA(cls, method, args); |
| |
| if (!env->ExceptionOccurred()) { |
| cls = env->FindClass("android/net/RouteInfo"); |
| method = env->GetMethodID(cls, "<init>", "(Ljava/net/InetAddress;)V"); |
| args[0].l = inetAddressObject; |
| jobject routeInfoObject = env->NewObjectA(cls, method, args); |
| |
| cls = env->FindClass("android/net/DhcpInfoInternal"); |
| method = env->GetMethodID(cls, "addRoute", "(Landroid/net/RouteInfo;)V"); |
| args[0].l = routeInfoObject; |
| env->CallVoidMethodA(info, method, args); |
| } else { |
| // if we have an exception (host not found perhaps), just don't add the route |
| env->ExceptionClear(); |
| } |
| |
| env->SetIntField(info, dhcpInfoInternalFieldIds.prefixLength, prefixLength); |
| env->SetObjectField(info, dhcpInfoInternalFieldIds.dns1, env->NewStringUTF(dns1)); |
| env->SetObjectField(info, dhcpInfoInternalFieldIds.dns2, env->NewStringUTF(dns2)); |
| env->SetObjectField(info, dhcpInfoInternalFieldIds.serverAddress, |
| env->NewStringUTF(server)); |
| env->SetIntField(info, dhcpInfoInternalFieldIds.leaseDuration, lease); |
| } |
| return (jboolean)(result == 0); |
| } |
| |
| static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info) |
| { |
| return android_net_utils_runDhcpCommon(env, clazz, ifname, info, false); |
| } |
| |
| static jboolean android_net_utils_runDhcpRenew(JNIEnv* env, jobject clazz, jstring ifname, jobject info) |
| { |
| return android_net_utils_runDhcpCommon(env, clazz, ifname, info, true); |
| } |
| |
| |
| static jboolean android_net_utils_stopDhcp(JNIEnv* env, jobject clazz, jstring ifname) |
| { |
| int result; |
| |
| const char *nameStr = env->GetStringUTFChars(ifname, NULL); |
| result = ::dhcp_stop(nameStr); |
| env->ReleaseStringUTFChars(ifname, nameStr); |
| return (jboolean)(result == 0); |
| } |
| |
| static jboolean android_net_utils_releaseDhcpLease(JNIEnv* env, jobject clazz, jstring ifname) |
| { |
| int result; |
| |
| const char *nameStr = env->GetStringUTFChars(ifname, NULL); |
| result = ::dhcp_release_lease(nameStr); |
| env->ReleaseStringUTFChars(ifname, nameStr); |
| return (jboolean)(result == 0); |
| } |
| |
| static jstring android_net_utils_getDhcpError(JNIEnv* env, jobject clazz) |
| { |
| return env->NewStringUTF(::dhcp_get_errmsg()); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| |
| /* |
| * JNI registration. |
| */ |
| static JNINativeMethod gNetworkUtilMethods[] = { |
| /* name, signature, funcPtr */ |
| |
| { "enableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_enableInterface }, |
| { "disableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_disableInterface }, |
| { "resetConnections", "(Ljava/lang/String;I)I", (void *)android_net_utils_resetConnections }, |
| { "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpInfoInternal;)Z", (void *)android_net_utils_runDhcp }, |
| { "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpInfoInternal;)Z", (void *)android_net_utils_runDhcpRenew }, |
| { "stopDhcp", "(Ljava/lang/String;)Z", (void *)android_net_utils_stopDhcp }, |
| { "releaseDhcpLease", "(Ljava/lang/String;)Z", (void *)android_net_utils_releaseDhcpLease }, |
| { "getDhcpError", "()Ljava/lang/String;", (void*) android_net_utils_getDhcpError }, |
| }; |
| |
| int register_android_net_NetworkUtils(JNIEnv* env) |
| { |
| jclass dhcpInfoInternalClass = env->FindClass("android/net/DhcpInfoInternal"); |
| LOG_FATAL_IF(dhcpInfoInternalClass == NULL, "Unable to find class android/net/DhcpInfoInternal"); |
| dhcpInfoInternalFieldIds.constructorId = env->GetMethodID(dhcpInfoInternalClass, "<init>", "()V"); |
| dhcpInfoInternalFieldIds.ipaddress = env->GetFieldID(dhcpInfoInternalClass, "ipAddress", "Ljava/lang/String;"); |
| dhcpInfoInternalFieldIds.prefixLength = env->GetFieldID(dhcpInfoInternalClass, "prefixLength", "I"); |
| dhcpInfoInternalFieldIds.dns1 = env->GetFieldID(dhcpInfoInternalClass, "dns1", "Ljava/lang/String;"); |
| dhcpInfoInternalFieldIds.dns2 = env->GetFieldID(dhcpInfoInternalClass, "dns2", "Ljava/lang/String;"); |
| dhcpInfoInternalFieldIds.serverAddress = env->GetFieldID(dhcpInfoInternalClass, "serverAddress", "Ljava/lang/String;"); |
| dhcpInfoInternalFieldIds.leaseDuration = env->GetFieldID(dhcpInfoInternalClass, "leaseDuration", "I"); |
| |
| return AndroidRuntime::registerNativeMethods(env, |
| NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods)); |
| } |
| |
| }; // namespace android |