android_net_NetUtils.cpp revision f013e1afd1e68af5e3b868c26a653bbfb39538f8
1/* 2 * Copyright 2008, 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 "NetUtils" 18 19#include "jni.h" 20#include <utils/misc.h> 21#include <android_runtime/AndroidRuntime.h> 22#include <utils/Log.h> 23#include <arpa/inet.h> 24 25extern "C" { 26int ifc_disable(const char *ifname); 27int ifc_add_host_route(const char *ifname, uint32_t addr); 28int ifc_remove_host_routes(const char *ifname); 29int ifc_set_default_route(const char *ifname, uint32_t gateway); 30int ifc_get_default_route(const char *ifname); 31int ifc_remove_default_route(const char *ifname); 32int ifc_reset_connections(const char *ifname); 33int ifc_configure(const char *ifname, in_addr_t ipaddr, in_addr_t netmask, in_addr_t gateway, in_addr_t dns1, in_addr_t dns2); 34 35int dhcp_do_request(const char *ifname, 36 in_addr_t *ipaddr, 37 in_addr_t *gateway, 38 in_addr_t *mask, 39 in_addr_t *dns1, 40 in_addr_t *dns2, 41 in_addr_t *server, 42 uint32_t *lease); 43int dhcp_stop(const char *ifname); 44int dhcp_release_lease(const char *ifname); 45char *dhcp_get_errmsg(); 46} 47 48#define NETUTILS_PKG_NAME "android/net/NetworkUtils" 49 50namespace android { 51 52/* 53 * The following remembers the jfieldID's of the fields 54 * of the DhcpInfo Java object, so that we don't have 55 * to look them up every time. 56 */ 57static struct fieldIds { 58 jclass dhcpInfoClass; 59 jmethodID constructorId; 60 jfieldID ipaddress; 61 jfieldID gateway; 62 jfieldID netmask; 63 jfieldID dns1; 64 jfieldID dns2; 65 jfieldID serverAddress; 66 jfieldID leaseDuration; 67} dhcpInfoFieldIds; 68 69static jint android_net_utils_disableInterface(JNIEnv* env, jobject clazz, jstring ifname) 70{ 71 int result; 72 73 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 74 result = ::ifc_disable(nameStr); 75 env->ReleaseStringUTFChars(ifname, nameStr); 76 return (jint)result; 77} 78 79static jint android_net_utils_addHostRoute(JNIEnv* env, jobject clazz, jstring ifname, jint addr) 80{ 81 int result; 82 83 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 84 result = ::ifc_add_host_route(nameStr, addr); 85 env->ReleaseStringUTFChars(ifname, nameStr); 86 return (jint)result; 87} 88 89static jint android_net_utils_removeHostRoutes(JNIEnv* env, jobject clazz, jstring ifname) 90{ 91 int result; 92 93 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 94 result = ::ifc_remove_host_routes(nameStr); 95 env->ReleaseStringUTFChars(ifname, nameStr); 96 return (jint)result; 97} 98 99static jint android_net_utils_setDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname, jint gateway) 100{ 101 int result; 102 103 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 104 result = ::ifc_set_default_route(nameStr, gateway); 105 env->ReleaseStringUTFChars(ifname, nameStr); 106 return (jint)result; 107} 108 109static jint android_net_utils_getDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname) 110{ 111 int result; 112 113 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 114 result = ::ifc_get_default_route(nameStr); 115 env->ReleaseStringUTFChars(ifname, nameStr); 116 return (jint)result; 117} 118 119static jint android_net_utils_removeDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname) 120{ 121 int result; 122 123 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 124 result = ::ifc_remove_default_route(nameStr); 125 env->ReleaseStringUTFChars(ifname, nameStr); 126 return (jint)result; 127} 128 129static jint android_net_utils_resetConnections(JNIEnv* env, jobject clazz, jstring ifname) 130{ 131 int result; 132 133 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 134 result = ::ifc_reset_connections(nameStr); 135 env->ReleaseStringUTFChars(ifname, nameStr); 136 return (jint)result; 137} 138 139static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info) 140{ 141 int result; 142 in_addr_t ipaddr, gateway, mask, dns1, dns2, server; 143 uint32_t lease; 144 145 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 146 result = ::dhcp_do_request(nameStr, &ipaddr, &gateway, &mask, 147 &dns1, &dns2, &server, &lease); 148 env->ReleaseStringUTFChars(ifname, nameStr); 149 if (result == 0 && dhcpInfoFieldIds.dhcpInfoClass != NULL) { 150 env->SetIntField(info, dhcpInfoFieldIds.ipaddress, ipaddr); 151 env->SetIntField(info, dhcpInfoFieldIds.gateway, gateway); 152 env->SetIntField(info, dhcpInfoFieldIds.netmask, mask); 153 env->SetIntField(info, dhcpInfoFieldIds.dns1, dns1); 154 env->SetIntField(info, dhcpInfoFieldIds.dns2, dns2); 155 env->SetIntField(info, dhcpInfoFieldIds.serverAddress, server); 156 env->SetIntField(info, dhcpInfoFieldIds.leaseDuration, lease); 157 } 158 return (jboolean)(result == 0); 159} 160 161static jboolean android_net_utils_stopDhcp(JNIEnv* env, jobject clazz, jstring ifname) 162{ 163 int result; 164 165 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 166 result = ::dhcp_stop(nameStr); 167 env->ReleaseStringUTFChars(ifname, nameStr); 168 return (jboolean)(result == 0); 169} 170 171static jboolean android_net_utils_releaseDhcpLease(JNIEnv* env, jobject clazz, jstring ifname) 172{ 173 int result; 174 175 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 176 result = ::dhcp_release_lease(nameStr); 177 env->ReleaseStringUTFChars(ifname, nameStr); 178 return (jboolean)(result == 0); 179} 180 181static jstring android_net_utils_getDhcpError(JNIEnv* env, jobject clazz) 182{ 183 return env->NewStringUTF(::dhcp_get_errmsg()); 184} 185 186static jboolean android_net_utils_configureInterface(JNIEnv* env, 187 jobject clazz, 188 jstring ifname, 189 jint ipaddr, 190 jint mask, 191 jint gateway, 192 jint dns1, 193 jint dns2) 194{ 195 int result; 196 uint32_t lease; 197 198 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 199 result = ::ifc_configure(nameStr, ipaddr, mask, gateway, dns1, dns2); 200 env->ReleaseStringUTFChars(ifname, nameStr); 201 return (jboolean)(result == 0); 202} 203 204// ---------------------------------------------------------------------------- 205 206/* 207 * JNI registration. 208 */ 209static JNINativeMethod gNetworkUtilMethods[] = { 210 /* name, signature, funcPtr */ 211 212 { "disableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_disableInterface }, 213 { "addHostRoute", "(Ljava/lang/String;I)I", (void *)android_net_utils_addHostRoute }, 214 { "removeHostRoutes", "(Ljava/lang/String;)I", (void *)android_net_utils_removeHostRoutes }, 215 { "setDefaultRoute", "(Ljava/lang/String;I)I", (void *)android_net_utils_setDefaultRoute }, 216 { "getDefaultRoute", "(Ljava/lang/String;)I", (void *)android_net_utils_getDefaultRoute }, 217 { "removeDefaultRoute", "(Ljava/lang/String;)I", (void *)android_net_utils_removeDefaultRoute }, 218 { "resetConnections", "(Ljava/lang/String;)I", (void *)android_net_utils_resetConnections }, 219 { "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpInfo;)Z", (void *)android_net_utils_runDhcp }, 220 { "stopDhcp", "(Ljava/lang/String;)Z", (void *)android_net_utils_stopDhcp }, 221 { "releaseDhcpLease", "(Ljava/lang/String;)Z", (void *)android_net_utils_releaseDhcpLease }, 222 { "configureNative", "(Ljava/lang/String;IIIII)Z", (void *)android_net_utils_configureInterface }, 223 { "getDhcpError", "()Ljava/lang/String;", (void*) android_net_utils_getDhcpError }, 224}; 225 226int register_android_net_NetworkUtils(JNIEnv* env) 227{ 228 jclass netutils = env->FindClass(NETUTILS_PKG_NAME); 229 LOG_FATAL_IF(netutils == NULL, "Unable to find class " NETUTILS_PKG_NAME); 230 231 dhcpInfoFieldIds.dhcpInfoClass = env->FindClass("android/net/DhcpInfo"); 232 if (dhcpInfoFieldIds.dhcpInfoClass != NULL) { 233 dhcpInfoFieldIds.constructorId = env->GetMethodID(dhcpInfoFieldIds.dhcpInfoClass, "<init>", "()V"); 234 dhcpInfoFieldIds.ipaddress = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "ipAddress", "I"); 235 dhcpInfoFieldIds.gateway = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "gateway", "I"); 236 dhcpInfoFieldIds.netmask = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "netmask", "I"); 237 dhcpInfoFieldIds.dns1 = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "dns1", "I"); 238 dhcpInfoFieldIds.dns2 = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "dns2", "I"); 239 dhcpInfoFieldIds.serverAddress = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "serverAddress", "I"); 240 dhcpInfoFieldIds.leaseDuration = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "leaseDuration", "I"); 241 } 242 243 return AndroidRuntime::registerNativeMethods(env, 244 NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods)); 245} 246 247}; // namespace android 248