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 "JNIHelp.h" 21 #include <utils/misc.h> 22 #include <android_runtime/AndroidRuntime.h> 23 #include <utils/Log.h> 24 #include <arpa/inet.h> 25 #include <cutils/properties.h> 26 27 extern "C" { 28 int ifc_enable(const char *ifname); 29 int ifc_disable(const char *ifname); 30 int ifc_reset_connections(const char *ifname, int reset_mask); 31 32 int dhcp_do_request(const char * const ifname, 33 const char *ipaddr, 34 const char *gateway, 35 uint32_t *prefixLength, 36 const char *dns[], 37 const char *server, 38 uint32_t *lease, 39 const char *vendorInfo, 40 const char *domains, 41 const char *mtu); 42 43 int dhcp_do_request_renew(const char * const ifname, 44 const char *ipaddr, 45 const char *gateway, 46 uint32_t *prefixLength, 47 const char *dns[], 48 const char *server, 49 uint32_t *lease, 50 const char *vendorInfo, 51 const char *domains, 52 const char *mtu); 53 54 int dhcp_stop(const char *ifname); 55 int dhcp_release_lease(const char *ifname); 56 char *dhcp_get_errmsg(); 57 } 58 59 #define NETUTILS_PKG_NAME "android/net/NetworkUtils" 60 61 namespace android { 62 63 /* 64 * The following remembers the jfieldID's of the fields 65 * of the DhcpInfo Java object, so that we don't have 66 * to look them up every time. 67 */ 68 static struct fieldIds { 69 jmethodID clear; 70 jmethodID setInterfaceName; 71 jmethodID addLinkAddress; 72 jmethodID addGateway; 73 jmethodID addDns; 74 jmethodID setDomains; 75 jmethodID setServerAddress; 76 jmethodID setLeaseDuration; 77 jmethodID setVendorInfo; 78 } dhcpResultsFieldIds; 79 80 static jint android_net_utils_enableInterface(JNIEnv* env, jobject clazz, jstring ifname) 81 { 82 int result; 83 84 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 85 result = ::ifc_enable(nameStr); 86 env->ReleaseStringUTFChars(ifname, nameStr); 87 return (jint)result; 88 } 89 90 static jint android_net_utils_disableInterface(JNIEnv* env, jobject clazz, jstring ifname) 91 { 92 int result; 93 94 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 95 result = ::ifc_disable(nameStr); 96 env->ReleaseStringUTFChars(ifname, nameStr); 97 return (jint)result; 98 } 99 100 static jint android_net_utils_resetConnections(JNIEnv* env, jobject clazz, 101 jstring ifname, jint mask) 102 { 103 int result; 104 105 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 106 107 ALOGD("android_net_utils_resetConnections in env=%p clazz=%p iface=%s mask=0x%x\n", 108 env, clazz, nameStr, mask); 109 110 result = ::ifc_reset_connections(nameStr, mask); 111 env->ReleaseStringUTFChars(ifname, nameStr); 112 return (jint)result; 113 } 114 115 static jboolean android_net_utils_runDhcpCommon(JNIEnv* env, jobject clazz, jstring ifname, 116 jobject dhcpResults, bool renew) 117 { 118 int result; 119 char ipaddr[PROPERTY_VALUE_MAX]; 120 uint32_t prefixLength; 121 char gateway[PROPERTY_VALUE_MAX]; 122 char dns1[PROPERTY_VALUE_MAX]; 123 char dns2[PROPERTY_VALUE_MAX]; 124 char dns3[PROPERTY_VALUE_MAX]; 125 char dns4[PROPERTY_VALUE_MAX]; 126 const char *dns[5] = {dns1, dns2, dns3, dns4, NULL}; 127 char server[PROPERTY_VALUE_MAX]; 128 uint32_t lease; 129 char vendorInfo[PROPERTY_VALUE_MAX]; 130 char domains[PROPERTY_VALUE_MAX]; 131 char mtu[PROPERTY_VALUE_MAX]; 132 133 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 134 if (nameStr == NULL) return (jboolean)false; 135 136 if (renew) { 137 result = ::dhcp_do_request_renew(nameStr, ipaddr, gateway, &prefixLength, 138 dns, server, &lease, vendorInfo, domains, mtu); 139 } else { 140 result = ::dhcp_do_request(nameStr, ipaddr, gateway, &prefixLength, 141 dns, server, &lease, vendorInfo, domains, mtu); 142 } 143 if (result != 0) { 144 ALOGD("dhcp_do_request failed : %s (%s)", nameStr, renew ? "renew" : "new"); 145 } 146 147 env->ReleaseStringUTFChars(ifname, nameStr); 148 if (result == 0) { 149 env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.clear); 150 151 // set mIfaceName 152 // dhcpResults->setInterfaceName(ifname) 153 env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setInterfaceName, ifname); 154 155 // set the linkAddress 156 // dhcpResults->addLinkAddress(inetAddress, prefixLength) 157 result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.addLinkAddress, 158 env->NewStringUTF(ipaddr), prefixLength); 159 } 160 161 if (result == 0) { 162 // set the gateway 163 // dhcpResults->addGateway(gateway) 164 result = env->CallBooleanMethod(dhcpResults, 165 dhcpResultsFieldIds.addGateway, env->NewStringUTF(gateway)); 166 } 167 168 if (result == 0) { 169 // dhcpResults->addDns(new InetAddress(dns1)) 170 result = env->CallBooleanMethod(dhcpResults, 171 dhcpResultsFieldIds.addDns, env->NewStringUTF(dns1)); 172 } 173 174 if (result == 0) { 175 env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setDomains, 176 env->NewStringUTF(domains)); 177 178 result = env->CallBooleanMethod(dhcpResults, 179 dhcpResultsFieldIds.addDns, env->NewStringUTF(dns2)); 180 181 if (result == 0) { 182 result = env->CallBooleanMethod(dhcpResults, 183 dhcpResultsFieldIds.addDns, env->NewStringUTF(dns3)); 184 if (result == 0) { 185 result = env->CallBooleanMethod(dhcpResults, 186 dhcpResultsFieldIds.addDns, env->NewStringUTF(dns4)); 187 } 188 } 189 } 190 191 if (result == 0) { 192 // dhcpResults->setServerAddress(new InetAddress(server)) 193 result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.setServerAddress, 194 env->NewStringUTF(server)); 195 } 196 197 if (result == 0) { 198 // dhcpResults->setLeaseDuration(lease) 199 env->CallVoidMethod(dhcpResults, 200 dhcpResultsFieldIds.setLeaseDuration, lease); 201 202 // dhcpResults->setVendorInfo(vendorInfo) 203 env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setVendorInfo, 204 env->NewStringUTF(vendorInfo)); 205 } 206 return (jboolean)(result == 0); 207 } 208 209 210 static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info) 211 { 212 return android_net_utils_runDhcpCommon(env, clazz, ifname, info, false); 213 } 214 215 static jboolean android_net_utils_runDhcpRenew(JNIEnv* env, jobject clazz, jstring ifname, jobject info) 216 { 217 return android_net_utils_runDhcpCommon(env, clazz, ifname, info, true); 218 } 219 220 221 static jboolean android_net_utils_stopDhcp(JNIEnv* env, jobject clazz, jstring ifname) 222 { 223 int result; 224 225 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 226 result = ::dhcp_stop(nameStr); 227 env->ReleaseStringUTFChars(ifname, nameStr); 228 return (jboolean)(result == 0); 229 } 230 231 static jboolean android_net_utils_releaseDhcpLease(JNIEnv* env, jobject clazz, jstring ifname) 232 { 233 int result; 234 235 const char *nameStr = env->GetStringUTFChars(ifname, NULL); 236 result = ::dhcp_release_lease(nameStr); 237 env->ReleaseStringUTFChars(ifname, nameStr); 238 return (jboolean)(result == 0); 239 } 240 241 static jstring android_net_utils_getDhcpError(JNIEnv* env, jobject clazz) 242 { 243 return env->NewStringUTF(::dhcp_get_errmsg()); 244 } 245 246 static void android_net_utils_markSocket(JNIEnv *env, jobject thiz, jint socket, jint mark) 247 { 248 if (setsockopt(socket, SOL_SOCKET, SO_MARK, &mark, sizeof(mark)) < 0) { 249 jniThrowException(env, "java/lang/IllegalStateException", "Error marking socket"); 250 } 251 } 252 253 // ---------------------------------------------------------------------------- 254 255 /* 256 * JNI registration. 257 */ 258 static JNINativeMethod gNetworkUtilMethods[] = { 259 /* name, signature, funcPtr */ 260 261 { "enableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_enableInterface }, 262 { "disableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_disableInterface }, 263 { "resetConnections", "(Ljava/lang/String;I)I", (void *)android_net_utils_resetConnections }, 264 { "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpResults;)Z", (void *)android_net_utils_runDhcp }, 265 { "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpResults;)Z", (void *)android_net_utils_runDhcpRenew }, 266 { "stopDhcp", "(Ljava/lang/String;)Z", (void *)android_net_utils_stopDhcp }, 267 { "releaseDhcpLease", "(Ljava/lang/String;)Z", (void *)android_net_utils_releaseDhcpLease }, 268 { "getDhcpError", "()Ljava/lang/String;", (void*) android_net_utils_getDhcpError }, 269 { "markSocket", "(II)V", (void*) android_net_utils_markSocket }, 270 }; 271 272 int register_android_net_NetworkUtils(JNIEnv* env) 273 { 274 jclass dhcpResultsClass = env->FindClass("android/net/DhcpResults"); 275 LOG_FATAL_IF(dhcpResultsClass == NULL, "Unable to find class android/net/DhcpResults"); 276 dhcpResultsFieldIds.clear = 277 env->GetMethodID(dhcpResultsClass, "clear", "()V"); 278 dhcpResultsFieldIds.setInterfaceName = 279 env->GetMethodID(dhcpResultsClass, "setInterfaceName", "(Ljava/lang/String;)V"); 280 dhcpResultsFieldIds.addLinkAddress = 281 env->GetMethodID(dhcpResultsClass, "addLinkAddress", "(Ljava/lang/String;I)Z"); 282 dhcpResultsFieldIds.addGateway = 283 env->GetMethodID(dhcpResultsClass, "addGateway", "(Ljava/lang/String;)Z"); 284 dhcpResultsFieldIds.addDns = 285 env->GetMethodID(dhcpResultsClass, "addDns", "(Ljava/lang/String;)Z"); 286 dhcpResultsFieldIds.setDomains = 287 env->GetMethodID(dhcpResultsClass, "setDomains", "(Ljava/lang/String;)V"); 288 dhcpResultsFieldIds.setServerAddress = 289 env->GetMethodID(dhcpResultsClass, "setServerAddress", "(Ljava/lang/String;)Z"); 290 dhcpResultsFieldIds.setLeaseDuration = 291 env->GetMethodID(dhcpResultsClass, "setLeaseDuration", "(I)V"); 292 dhcpResultsFieldIds.setVendorInfo = 293 env->GetMethodID(dhcpResultsClass, "setVendorInfo", "(Ljava/lang/String;)V"); 294 295 return AndroidRuntime::registerNativeMethods(env, 296 NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods)); 297 } 298 299 }; // namespace android 300
