324 lines
12 KiB
C++
324 lines
12 KiB
C++
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/*
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* Copyright 2008, The Android Open Source Project
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* Copyright (c) 2011 The Linux Foundation. All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "NetUtils"
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#include "jni.h"
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#include <nativehelper/JNIHelp.h>
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#include <utils/misc.h>
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#include <android_runtime/AndroidRuntime.h>
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#include <utils/Log.h>
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#include <arpa/inet.h>
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extern "C" {
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int ifc_enable(const char *ifname);
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int ifc_disable(const char *ifname);
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int ifc_add_route(const char *ifname, const char *addr, int prefixLength);
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int ifc_remove_host_routes(const char *ifname);
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int ifc_get_default_route(const char *ifname);
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int ifc_remove_default_route(const char *ifname);
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int ifc_reset_connections(const char *ifname);
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int 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);
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int dhcp_do_request(const char *ifname,
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in_addr_t *ipaddr,
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in_addr_t *gateway,
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in_addr_t *mask,
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in_addr_t *dns1,
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in_addr_t *dns2,
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in_addr_t *server,
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uint32_t *lease);
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int dhcp_stop(const char *ifname);
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int dhcp_release_lease(const char *ifname);
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char *dhcp_get_errmsg();
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int dhcp_do_request_renew(const char *ifname,
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in_addr_t *ipaddr,
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in_addr_t *gateway,
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in_addr_t *mask,
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in_addr_t *dns1,
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in_addr_t *dns2,
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in_addr_t *server,
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uint32_t *lease);
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}
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#define NETUTILS_PKG_NAME "android/net/NetworkUtils"
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namespace android {
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/*
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* The following remembers the jfieldID's of the fields
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* of the DhcpInfo Java object, so that we don't have
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* to look them up every time.
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*/
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static struct fieldIds {
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jclass dhcpInfoClass;
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jmethodID constructorId;
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jfieldID ipaddress;
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jfieldID gateway;
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jfieldID netmask;
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jfieldID dns1;
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jfieldID dns2;
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jfieldID serverAddress;
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jfieldID leaseDuration;
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} dhcpInfoFieldIds;
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static jint android_net_utils_enableInterface(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_enable(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jint)result;
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}
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static jint android_net_utils_disableInterface(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_disable(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jint)result;
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}
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static jint android_net_utils_addRoute(JNIEnv* env, jobject clazz, jstring ifname,
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jstring addr, jint prefixLength)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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const char *addrStr = env->GetStringUTFChars(addr, NULL);
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result = ::ifc_add_route(nameStr, addrStr, prefixLength);
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env->ReleaseStringUTFChars(ifname, nameStr);
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env->ReleaseStringUTFChars(addr, addrStr);
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return (jint)result;
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}
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static jint android_net_utils_removeHostRoutes(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_remove_host_routes(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jint)result;
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}
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static jint android_net_utils_getDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_get_default_route(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jint)result;
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}
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static jint android_net_utils_removeDefaultRoute(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_remove_default_route(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jint)result;
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}
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static jint android_net_utils_resetConnections(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_reset_connections(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jint)result;
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}
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static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info)
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{
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int result;
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in_addr_t ipaddr, gateway, mask, dns1, dns2, server;
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uint32_t lease;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::dhcp_do_request(nameStr, &ipaddr, &gateway, &mask,
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&dns1, &dns2, &server, &lease);
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env->ReleaseStringUTFChars(ifname, nameStr);
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if (result == 0 && dhcpInfoFieldIds.dhcpInfoClass != NULL) {
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env->SetIntField(info, dhcpInfoFieldIds.ipaddress, ipaddr);
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env->SetIntField(info, dhcpInfoFieldIds.gateway, gateway);
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env->SetIntField(info, dhcpInfoFieldIds.netmask, mask);
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env->SetIntField(info, dhcpInfoFieldIds.dns1, dns1);
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env->SetIntField(info, dhcpInfoFieldIds.dns2, dns2);
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env->SetIntField(info, dhcpInfoFieldIds.serverAddress, server);
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env->SetIntField(info, dhcpInfoFieldIds.leaseDuration, lease);
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}
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return (jboolean)(result == 0);
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}
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static jboolean android_net_utils_stopDhcp(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::dhcp_stop(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jboolean)(result == 0);
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}
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static jboolean android_net_utils_releaseDhcpLease(JNIEnv* env, jobject clazz, jstring ifname)
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{
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int result;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::dhcp_release_lease(nameStr);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jboolean)(result == 0);
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}
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static jstring android_net_utils_getDhcpError(JNIEnv* env, jobject clazz)
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{
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return env->NewStringUTF(::dhcp_get_errmsg());
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}
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static jboolean android_net_utils_configureInterface(JNIEnv* env,
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jobject clazz,
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jstring ifname,
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jint ipaddr,
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jint mask,
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jint gateway,
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jint dns1,
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jint dns2)
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{
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int result;
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uint32_t lease;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::ifc_configure(nameStr, ipaddr, mask, gateway, dns1, dns2);
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env->ReleaseStringUTFChars(ifname, nameStr);
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return (jboolean)(result == 0);
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}
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static jboolean android_net_utils_runDhcpRenew(JNIEnv* env, jobject clazz, jstring ifname, jobject info)
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{
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int result = -1;
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in_addr_t ipaddr, gateway, mask, dns1, dns2, server;
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uint32_t lease;
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const char *nameStr = env->GetStringUTFChars(ifname, NULL);
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result = ::dhcp_do_request_renew(nameStr, &ipaddr, &gateway, &mask,
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&dns1, &dns2, &server, &lease);
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env->ReleaseStringUTFChars(ifname, nameStr);
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if (result == 0 && dhcpInfoFieldIds.dhcpInfoClass != NULL) {
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env->SetIntField(info, dhcpInfoFieldIds.ipaddress, ipaddr);
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env->SetIntField(info, dhcpInfoFieldIds.gateway, gateway);
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env->SetIntField(info, dhcpInfoFieldIds.netmask, mask);
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env->SetIntField(info, dhcpInfoFieldIds.dns1, dns1);
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env->SetIntField(info, dhcpInfoFieldIds.dns2, dns2);
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env->SetIntField(info, dhcpInfoFieldIds.serverAddress, server);
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env->SetIntField(info, dhcpInfoFieldIds.leaseDuration, lease);
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}
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return (jboolean)(result == 0);
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}
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static jbyteArray android_net_utils_ipAddrStringToByteArray(JNIEnv* env, jobject, jstring javaString) {
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int error;
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int address_type;
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const char *addrStr = env->GetStringUTFChars(javaString, NULL);
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if (addrStr == NULL) {
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jniThrowException(env, "java/net/UnknownHostException","null argument");
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return NULL;
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}
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if (strchr(addrStr,':') != NULL) address_type = AF_INET6;
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else if (strchr(addrStr,'.') != NULL) address_type = AF_INET;
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else {
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jniThrowException(env, "java/net/UnknownHostException","IP family not recognized");
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return NULL;
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}
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int structsz = (address_type==AF_INET) ?
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sizeof(struct in_addr) : sizeof(struct in6_addr);
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unsigned char rawByteAddr[structsz];
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memset(rawByteAddr, 0, structsz);
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if ((error = inet_pton(address_type, addrStr, rawByteAddr)) < 1) {
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error = errno;
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jniThrowException(env, "java/net/UnknownHostException","inet_pton failure");
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return NULL;
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}
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jbyteArray byteArray = env->NewByteArray(structsz);
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if (byteArray == NULL) {
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jniThrowException(env, "java/net/UnknownHostException","Out of memory");
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return NULL;
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}
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env->SetByteArrayRegion(byteArray, 0, structsz, reinterpret_cast<jbyte*>(rawByteAddr));
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env->ReleaseStringUTFChars(javaString, addrStr);
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return byteArray;
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}
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// ----------------------------------------------------------------------------
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/*
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* JNI registration.
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*/
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static JNINativeMethod gNetworkUtilMethods[] = {
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/* name, signature, funcPtr */
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{ "enableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_enableInterface },
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{ "disableInterface", "(Ljava/lang/String;)I", (void *)android_net_utils_disableInterface },
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{ "addRoute", "(Ljava/lang/String;Ljava/lang/String;I)I", (void *)android_net_utils_addRoute },
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{ "removeHostRoutes", "(Ljava/lang/String;)I", (void *)android_net_utils_removeHostRoutes },
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{ "getDefaultRoute", "(Ljava/lang/String;)I", (void *)android_net_utils_getDefaultRoute },
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{ "removeDefaultRoute", "(Ljava/lang/String;)I", (void *)android_net_utils_removeDefaultRoute },
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{ "resetConnections", "(Ljava/lang/String;)I", (void *)android_net_utils_resetConnections },
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{ "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpInfo;)Z", (void *)android_net_utils_runDhcp },
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{ "stopDhcp", "(Ljava/lang/String;)Z", (void *)android_net_utils_stopDhcp },
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{ "releaseDhcpLease", "(Ljava/lang/String;)Z", (void *)android_net_utils_releaseDhcpLease },
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{ "configureNative", "(Ljava/lang/String;IIIII)Z", (void *)android_net_utils_configureInterface },
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{ "getDhcpError", "()Ljava/lang/String;", (void*) android_net_utils_getDhcpError },
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{ "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpInfo;)Z", (void *)android_net_utils_runDhcpRenew },
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{ "ipAddrStringToByteArray", "(Ljava/lang/String;)[B", (void *)android_net_utils_ipAddrStringToByteArray }
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};
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int register_android_net_NetworkUtils(JNIEnv* env)
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{
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jclass netutils = env->FindClass(NETUTILS_PKG_NAME);
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LOG_FATAL_IF(netutils == NULL, "Unable to find class " NETUTILS_PKG_NAME);
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dhcpInfoFieldIds.dhcpInfoClass = env->FindClass("android/net/DhcpInfo");
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if (dhcpInfoFieldIds.dhcpInfoClass != NULL) {
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dhcpInfoFieldIds.constructorId = env->GetMethodID(dhcpInfoFieldIds.dhcpInfoClass, "<init>", "()V");
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dhcpInfoFieldIds.ipaddress = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "ipAddress", "I");
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dhcpInfoFieldIds.gateway = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "gateway", "I");
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dhcpInfoFieldIds.netmask = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "netmask", "I");
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dhcpInfoFieldIds.dns1 = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "dns1", "I");
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dhcpInfoFieldIds.dns2 = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "dns2", "I");
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dhcpInfoFieldIds.serverAddress = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "serverAddress", "I");
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dhcpInfoFieldIds.leaseDuration = env->GetFieldID(dhcpInfoFieldIds.dhcpInfoClass, "leaseDuration", "I");
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}
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return AndroidRuntime::registerNativeMethods(env,
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NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods));
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}
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}; // namespace android
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