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