core/jni/android_net_NetUtils.cpp - platform/frameworks/base - Git at Google

 /*
  * 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 "JNIHelp.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 * const ifname,
                     const char *ipaddr,
                     const char *gateway,
                     uint32_t *prefixLength,
                     const char *dns[],
                     const char *server,
                     uint32_t *lease,
                     const char *vendorInfo,
                     const char *domains,
                     const char *mtu);

 int dhcp_do_request_renew(const char * const ifname,
                     const char *ipaddr,
                     const char *gateway,
                     uint32_t *prefixLength,
                     const char *dns[],
                     const char *server,
                     uint32_t *lease,
                     const char *vendorInfo,
                     const char *domains,
                     const char *mtu);

 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 clear;
     jmethodID setInterfaceName;
     jmethodID addLinkAddress;
     jmethodID addGateway;
     jmethodID addDns;
     jmethodID setDomains;
     jmethodID setServerAddress;
     jmethodID setLeaseDuration;
     jmethodID setVendorInfo;
 } dhcpResultsFieldIds;

 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);

     ALOGD("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 dhcpResults, 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    dns3[PROPERTY_VALUE_MAX];
     char    dns4[PROPERTY_VALUE_MAX];
     const char *dns[5] = {dns1, dns2, dns3, dns4, NULL};
     char  server[PROPERTY_VALUE_MAX];
     uint32_t lease;
     char vendorInfo[PROPERTY_VALUE_MAX];
     char domains[PROPERTY_VALUE_MAX];
     char mtu[PROPERTY_VALUE_MAX];

     const char *nameStr = env->GetStringUTFChars(ifname, NULL);
     if (nameStr == NULL) return (jboolean)false;

     if (renew) {
         result = ::dhcp_do_request_renew(nameStr, ipaddr, gateway, &prefixLength,
                 dns, server, &lease, vendorInfo, domains, mtu);
     } else {
         result = ::dhcp_do_request(nameStr, ipaddr, gateway, &prefixLength,
                 dns, server, &lease, vendorInfo, domains, mtu);
     }
     if (result != 0) {
         ALOGD("dhcp_do_request failed : %s (%s)", nameStr, renew ? "renew" : "new");
     }

     env->ReleaseStringUTFChars(ifname, nameStr);
     if (result == 0) {
         env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.clear);

         // set mIfaceName
         // dhcpResults->setInterfaceName(ifname)
         env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setInterfaceName, ifname);

         // set the linkAddress
         // dhcpResults->addLinkAddress(inetAddress, prefixLength)
         result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.addLinkAddress,
                 env->NewStringUTF(ipaddr), prefixLength);
     }

     if (result == 0) {
         // set the gateway
         // dhcpResults->addGateway(gateway)
         result = env->CallBooleanMethod(dhcpResults,
                 dhcpResultsFieldIds.addGateway, env->NewStringUTF(gateway));
     }

     if (result == 0) {
         // dhcpResults->addDns(new InetAddress(dns1))
         result = env->CallBooleanMethod(dhcpResults,
                 dhcpResultsFieldIds.addDns, env->NewStringUTF(dns1));
     }

     if (result == 0) {
         env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setDomains,
                 env->NewStringUTF(domains));

         result = env->CallBooleanMethod(dhcpResults,
                 dhcpResultsFieldIds.addDns, env->NewStringUTF(dns2));

         if (result == 0) {
             result = env->CallBooleanMethod(dhcpResults,
                     dhcpResultsFieldIds.addDns, env->NewStringUTF(dns3));
             if (result == 0) {
                 result = env->CallBooleanMethod(dhcpResults,
                         dhcpResultsFieldIds.addDns, env->NewStringUTF(dns4));
             }
         }
     }

     if (result == 0) {
         // dhcpResults->setServerAddress(new InetAddress(server))
         result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.setServerAddress,
                 env->NewStringUTF(server));
     }

     if (result == 0) {
         // dhcpResults->setLeaseDuration(lease)
         env->CallVoidMethod(dhcpResults,
                 dhcpResultsFieldIds.setLeaseDuration, lease);

         // dhcpResults->setVendorInfo(vendorInfo)
         env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setVendorInfo,
                 env->NewStringUTF(vendorInfo));
     }
     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());
 }

 static void android_net_utils_markSocket(JNIEnv *env, jobject thiz, jint socket, jint mark)
 {
     if (setsockopt(socket, SOL_SOCKET, SO_MARK, &mark, sizeof(mark)) < 0) {
         jniThrowException(env, "java/lang/IllegalStateException", "Error marking socket");
     }
 }

 // ----------------------------------------------------------------------------

 /*
  * 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/DhcpResults;)Z",  (void *)android_net_utils_runDhcp },
     { "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpResults;)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 },
     { "markSocket", "(II)V", (void*) android_net_utils_markSocket },
 };

 int register_android_net_NetworkUtils(JNIEnv* env)
 {
     jclass dhcpResultsClass = env->FindClass("android/net/DhcpResults");
     LOG_FATAL_IF(dhcpResultsClass == NULL, "Unable to find class android/net/DhcpResults");
     dhcpResultsFieldIds.clear =
             env->GetMethodID(dhcpResultsClass, "clear", "()V");
     dhcpResultsFieldIds.setInterfaceName =
             env->GetMethodID(dhcpResultsClass, "setInterfaceName", "(Ljava/lang/String;)V");
     dhcpResultsFieldIds.addLinkAddress =
             env->GetMethodID(dhcpResultsClass, "addLinkAddress", "(Ljava/lang/String;I)Z");
     dhcpResultsFieldIds.addGateway =
             env->GetMethodID(dhcpResultsClass, "addGateway", "(Ljava/lang/String;)Z");
     dhcpResultsFieldIds.addDns =
             env->GetMethodID(dhcpResultsClass, "addDns", "(Ljava/lang/String;)Z");
     dhcpResultsFieldIds.setDomains =
             env->GetMethodID(dhcpResultsClass, "setDomains", "(Ljava/lang/String;)V");
     dhcpResultsFieldIds.setServerAddress =
             env->GetMethodID(dhcpResultsClass, "setServerAddress", "(Ljava/lang/String;)Z");
     dhcpResultsFieldIds.setLeaseDuration =
             env->GetMethodID(dhcpResultsClass, "setLeaseDuration", "(I)V");
     dhcpResultsFieldIds.setVendorInfo =
             env->GetMethodID(dhcpResultsClass, "setVendorInfo", "(Ljava/lang/String;)V");

     return AndroidRuntime::registerNativeMethods(env,
             NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods));
 }

 }; // namespace android
	/*
	* 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 "JNIHelp.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 * const ifname,
	const char *ipaddr,
	const char *gateway,
	uint32_t *prefixLength,
	const char *dns[],
	const char *server,
	uint32_t *lease,
	const char *vendorInfo,
	const char *domains,
	const char *mtu);

	int dhcp_do_request_renew(const char * const ifname,
	const char *ipaddr,
	const char *gateway,
	uint32_t *prefixLength,
	const char *dns[],
	const char *server,
	uint32_t *lease,
	const char *vendorInfo,
	const char *domains,
	const char *mtu);

	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 clear;
	jmethodID setInterfaceName;
	jmethodID addLinkAddress;
	jmethodID addGateway;
	jmethodID addDns;
	jmethodID setDomains;
	jmethodID setServerAddress;
	jmethodID setLeaseDuration;
	jmethodID setVendorInfo;
	} dhcpResultsFieldIds;

	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);

	ALOGD("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 dhcpResults, 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 dns3[PROPERTY_VALUE_MAX];
	char dns4[PROPERTY_VALUE_MAX];
	const char *dns[5] = {dns1, dns2, dns3, dns4, NULL};
	char server[PROPERTY_VALUE_MAX];
	uint32_t lease;
	char vendorInfo[PROPERTY_VALUE_MAX];
	char domains[PROPERTY_VALUE_MAX];
	char mtu[PROPERTY_VALUE_MAX];

	const char *nameStr = env->GetStringUTFChars(ifname, NULL);
	if (nameStr == NULL) return (jboolean)false;

	if (renew) {
	result = ::dhcp_do_request_renew(nameStr, ipaddr, gateway, &prefixLength,
	dns, server, &lease, vendorInfo, domains, mtu);
	} else {
	result = ::dhcp_do_request(nameStr, ipaddr, gateway, &prefixLength,
	dns, server, &lease, vendorInfo, domains, mtu);
	}
	if (result != 0) {
	ALOGD("dhcp_do_request failed : %s (%s)", nameStr, renew ? "renew" : "new");
	}

	env->ReleaseStringUTFChars(ifname, nameStr);
	if (result == 0) {
	env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.clear);

	// set mIfaceName
	// dhcpResults->setInterfaceName(ifname)
	env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setInterfaceName, ifname);

	// set the linkAddress
	// dhcpResults->addLinkAddress(inetAddress, prefixLength)
	result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.addLinkAddress,
	env->NewStringUTF(ipaddr), prefixLength);
	}

	if (result == 0) {
	// set the gateway
	// dhcpResults->addGateway(gateway)
	result = env->CallBooleanMethod(dhcpResults,
	dhcpResultsFieldIds.addGateway, env->NewStringUTF(gateway));
	}

	if (result == 0) {
	// dhcpResults->addDns(new InetAddress(dns1))
	result = env->CallBooleanMethod(dhcpResults,
	dhcpResultsFieldIds.addDns, env->NewStringUTF(dns1));
	}

	if (result == 0) {
	env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setDomains,
	env->NewStringUTF(domains));

	result = env->CallBooleanMethod(dhcpResults,
	dhcpResultsFieldIds.addDns, env->NewStringUTF(dns2));

	if (result == 0) {
	result = env->CallBooleanMethod(dhcpResults,
	dhcpResultsFieldIds.addDns, env->NewStringUTF(dns3));
	if (result == 0) {
	result = env->CallBooleanMethod(dhcpResults,
	dhcpResultsFieldIds.addDns, env->NewStringUTF(dns4));
	}
	}
	}

	if (result == 0) {
	// dhcpResults->setServerAddress(new InetAddress(server))
	result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.setServerAddress,
	env->NewStringUTF(server));
	}

	if (result == 0) {
	// dhcpResults->setLeaseDuration(lease)
	env->CallVoidMethod(dhcpResults,
	dhcpResultsFieldIds.setLeaseDuration, lease);

	// dhcpResults->setVendorInfo(vendorInfo)
	env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setVendorInfo,
	env->NewStringUTF(vendorInfo));
	}
	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());
	}

	static void android_net_utils_markSocket(JNIEnv *env, jobject thiz, jint socket, jint mark)
	{
	if (setsockopt(socket, SOL_SOCKET, SO_MARK, &mark, sizeof(mark)) < 0) {
	jniThrowException(env, "java/lang/IllegalStateException", "Error marking socket");
	}
	}

	// ----------------------------------------------------------------------------

	/*
	* 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/DhcpResults;)Z", (void *)android_net_utils_runDhcp },
	{ "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpResults;)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 },
	{ "markSocket", "(II)V", (void*) android_net_utils_markSocket },
	};

	int register_android_net_NetworkUtils(JNIEnv* env)
	{
	jclass dhcpResultsClass = env->FindClass("android/net/DhcpResults");
	LOG_FATAL_IF(dhcpResultsClass == NULL, "Unable to find class android/net/DhcpResults");
	dhcpResultsFieldIds.clear =
	env->GetMethodID(dhcpResultsClass, "clear", "()V");
	dhcpResultsFieldIds.setInterfaceName =
	env->GetMethodID(dhcpResultsClass, "setInterfaceName", "(Ljava/lang/String;)V");
	dhcpResultsFieldIds.addLinkAddress =
	env->GetMethodID(dhcpResultsClass, "addLinkAddress", "(Ljava/lang/String;I)Z");
	dhcpResultsFieldIds.addGateway =
	env->GetMethodID(dhcpResultsClass, "addGateway", "(Ljava/lang/String;)Z");
	dhcpResultsFieldIds.addDns =
	env->GetMethodID(dhcpResultsClass, "addDns", "(Ljava/lang/String;)Z");
	dhcpResultsFieldIds.setDomains =
	env->GetMethodID(dhcpResultsClass, "setDomains", "(Ljava/lang/String;)V");
	dhcpResultsFieldIds.setServerAddress =
	env->GetMethodID(dhcpResultsClass, "setServerAddress", "(Ljava/lang/String;)Z");
	dhcpResultsFieldIds.setLeaseDuration =
	env->GetMethodID(dhcpResultsClass, "setLeaseDuration", "(I)V");
	dhcpResultsFieldIds.setVendorInfo =
	env->GetMethodID(dhcpResultsClass, "setVendorInfo", "(Ljava/lang/String;)V");

	return AndroidRuntime::registerNativeMethods(env,
	NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods));
	}

	}; // namespace android