/*
* 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 <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 *ifname,
const char *ipaddr,
const char *gateway,
uint32_t *prefixLength,
const char *dns1,
const char *dns2,
const char *server,
uint32_t *lease);
int dhcp_do_request_renew(const char *ifname,
const char *ipaddr,
const char *gateway,
uint32_t *prefixLength,
const char *dns1,
const char *dns2,
const char *server,
uint32_t *lease);
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 constructorId;
jfieldID ipaddress;
jfieldID prefixLength;
jfieldID dns1;
jfieldID dns2;
jfieldID serverAddress;
jfieldID leaseDuration;
} dhcpInfoInternalFieldIds;
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);
LOGD("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 info, 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 server[PROPERTY_VALUE_MAX];
uint32_t lease;
const char *nameStr = env->GetStringUTFChars(ifname, NULL);
if (nameStr == NULL) return (jboolean)false;
if (renew) {
result = ::dhcp_do_request_renew(nameStr, ipaddr, gateway, &prefixLength,
dns1, dns2, server, &lease);
} else {
result = ::dhcp_do_request(nameStr, ipaddr, gateway, &prefixLength,
dns1, dns2, server, &lease);
}
env->ReleaseStringUTFChars(ifname, nameStr);
if (result == 0) {
env->SetObjectField(info, dhcpInfoInternalFieldIds.ipaddress, env->NewStringUTF(ipaddr));
// set the gateway
jclass cls = env->FindClass("java/net/InetAddress");
jmethodID method = env->GetStaticMethodID(cls, "getByName",
"(Ljava/lang/String;)Ljava/net/InetAddress;");
jvalue args[1];
args[0].l = env->NewStringUTF(gateway);
jobject inetAddressObject = env->CallStaticObjectMethodA(cls, method, args);
if (!env->ExceptionOccurred()) {
cls = env->FindClass("android/net/RouteInfo");
method = env->GetMethodID(cls, "<init>", "(Ljava/net/InetAddress;)V");
args[0].l = inetAddressObject;
jobject routeInfoObject = env->NewObjectA(cls, method, args);
cls = env->FindClass("android/net/DhcpInfoInternal");
method = env->GetMethodID(cls, "addRoute", "(Landroid/net/RouteInfo;)V");
args[0].l = routeInfoObject;
env->CallVoidMethodA(info, method, args);
} else {
// if we have an exception (host not found perhaps), just don't add the route
env->ExceptionClear();
}
env->SetIntField(info, dhcpInfoInternalFieldIds.prefixLength, prefixLength);
env->SetObjectField(info, dhcpInfoInternalFieldIds.dns1, env->NewStringUTF(dns1));
env->SetObjectField(info, dhcpInfoInternalFieldIds.dns2, env->NewStringUTF(dns2));
env->SetObjectField(info, dhcpInfoInternalFieldIds.serverAddress,
env->NewStringUTF(server));
env->SetIntField(info, dhcpInfoInternalFieldIds.leaseDuration, lease);
}
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());
}
// ----------------------------------------------------------------------------
/*
* 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/DhcpInfoInternal;)Z", (void *)android_net_utils_runDhcp },
{ "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpInfoInternal;)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 },
};
int register_android_net_NetworkUtils(JNIEnv* env)
{
jclass dhcpInfoInternalClass = env->FindClass("android/net/DhcpInfoInternal");
LOG_FATAL_IF(dhcpInfoInternalClass == NULL, "Unable to find class android/net/DhcpInfoInternal");
dhcpInfoInternalFieldIds.constructorId = env->GetMethodID(dhcpInfoInternalClass, "<init>", "()V");
dhcpInfoInternalFieldIds.ipaddress = env->GetFieldID(dhcpInfoInternalClass, "ipAddress", "Ljava/lang/String;");
dhcpInfoInternalFieldIds.prefixLength = env->GetFieldID(dhcpInfoInternalClass, "prefixLength", "I");
dhcpInfoInternalFieldIds.dns1 = env->GetFieldID(dhcpInfoInternalClass, "dns1", "Ljava/lang/String;");
dhcpInfoInternalFieldIds.dns2 = env->GetFieldID(dhcpInfoInternalClass, "dns2", "Ljava/lang/String;");
dhcpInfoInternalFieldIds.serverAddress = env->GetFieldID(dhcpInfoInternalClass, "serverAddress", "Ljava/lang/String;");
dhcpInfoInternalFieldIds.leaseDuration = env->GetFieldID(dhcpInfoInternalClass, "leaseDuration", "I");
return AndroidRuntime::registerNativeMethods(env,
NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods));
}
}; // namespace android