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/*
* Copyright (C) 2010 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 "NetworkUtilities"
#include "NetworkUtilities.h"
#include "JNIHelp.h"
#include <arpa/inet.h>
#include <stdio.h>
#include <string.h>
// Used by functions that shouldn't throw SocketException. (These functions
// aren't meant to see bad addresses, so seeing one really does imply an
// internal error.)
// TODO: fix the code (native and Java) so we don't paint ourselves into this corner.
static void jniThrowBadAddressFamily(JNIEnv* env) {
jniThrowException(env, "java/lang/IllegalArgumentException", "Bad address family");
}
bool byteArrayToSocketAddress(JNIEnv* env, jclass, jbyteArray byteArray, int port, sockaddr_storage* ss) {
if (byteArray == NULL) {
jniThrowNullPointerException(env, NULL);
return false;
}
// Convert the IP address bytes to the proper IP address type.
size_t addressLength = env->GetArrayLength(byteArray);
memset(ss, 0, sizeof(*ss));
if (addressLength == 4) {
// IPv4 address.
sockaddr_in *sin = reinterpret_cast<sockaddr_in*>(ss);
sin->sin_family = AF_INET;
sin->sin_port = htons(port);
jbyte* dst = reinterpret_cast<jbyte*>(&sin->sin_addr.s_addr);
env->GetByteArrayRegion(byteArray, 0, 4, dst);
} else if (addressLength == 16) {
// IPv6 address.
sockaddr_in6 *sin6 = reinterpret_cast<sockaddr_in6*>(ss);
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(port);
jbyte* dst = reinterpret_cast<jbyte*>(&sin6->sin6_addr.s6_addr);
env->GetByteArrayRegion(byteArray, 0, 16, dst);
} else {
jniThrowBadAddressFamily(env);
return false;
}
return true;
}
jbyteArray socketAddressToByteArray(JNIEnv* env, sockaddr_storage* ss) {
void *rawAddress;
size_t addressLength;
if (ss->ss_family == AF_INET) {
struct sockaddr_in *sin = reinterpret_cast<sockaddr_in*>(ss);
rawAddress = &sin->sin_addr.s_addr;
addressLength = 4;
} else if (ss->ss_family == AF_INET6) {
struct sockaddr_in6 *sin6 = reinterpret_cast<sockaddr_in6*>(ss);
rawAddress = &sin6->sin6_addr.s6_addr;
addressLength = 16;
} else {
jniThrowBadAddressFamily(env);
return NULL;
}
jbyteArray byteArray = env->NewByteArray(addressLength);
if (byteArray == NULL) {
return NULL;
}
env->SetByteArrayRegion(byteArray, 0, addressLength, reinterpret_cast<jbyte*>(rawAddress));
return byteArray;
}
jobject byteArrayToInetAddress(JNIEnv* env, jbyteArray byteArray) {
if (byteArray == NULL) {
return NULL;
}
jclass inetAddressClass = env->FindClass("java/net/InetAddress");
if (inetAddressClass == NULL) {
return NULL;
}
jmethodID getByAddressMethod = env->GetStaticMethodID(inetAddressClass,
"getByAddress", "([B)Ljava/net/InetAddress;");
if (getByAddressMethod == NULL) {
return NULL;
}
return env->CallStaticObjectMethod(inetAddressClass, getByAddressMethod, byteArray);
}
jobject socketAddressToInetAddress(JNIEnv* env, sockaddr_storage* ss) {
jbyteArray byteArray = socketAddressToByteArray(env, ss);
return byteArrayToInetAddress(env, byteArray);
}
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