NetworkUtils/src/dorkbox/netUtil/SocketUtils.kt

164 lines
5.8 KiB
Kotlin

/*
* Copyright 2016 The Netty Project
*
* The Netty Project licenses this file to you 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.
*/
package dorkbox.netUtil
import java.io.IOException
import java.net.*
import java.nio.channels.DatagramChannel
import java.nio.channels.ServerSocketChannel
import java.nio.channels.SocketChannel
import java.security.AccessController
import java.security.PrivilegedAction
import java.security.PrivilegedActionException
import java.security.PrivilegedExceptionAction
import java.util.*
/**
* Provides socket operations with privileges enabled. This is necessary for applications that use the
* [SecurityManager] to restrict [SocketPermission] to their application.
*
* By asserting that these operations are privileged, the operations can proceed even if some code in the calling chain lacks
* the appropriate [SocketPermission].
*/
object SocketUtils {
/**
* Gets the version number.
*/
const val version = "2.9.1"
private val EMPTY = Collections.enumeration(emptyList<Any>())
@Suppress("UNCHECKED_CAST")
private fun <T> empty(): Enumeration<T> {
return EMPTY as Enumeration<T>
}
@Throws(IOException::class)
fun connect(socket: Socket, remoteAddress: SocketAddress?, timeout: Int) {
try {
AccessController.doPrivileged<Void>(PrivilegedExceptionAction<Void?> {
socket.connect(remoteAddress, timeout)
null
})
} catch (e: PrivilegedActionException) {
throw (e.cause as IOException?)!!
}
}
@Throws(IOException::class)
fun bind(socket: Socket, bindpoint: SocketAddress?) {
try {
AccessController.doPrivileged<Void>(PrivilegedExceptionAction<Void?> {
socket.bind(bindpoint)
null
})
} catch (e: PrivilegedActionException) {
throw (e.cause as IOException?)!!
}
}
@Throws(IOException::class)
fun connect(socketChannel: SocketChannel, remoteAddress: SocketAddress?): Boolean {
return try {
AccessController.doPrivileged(PrivilegedExceptionAction { socketChannel.connect(remoteAddress) })
} catch (e: PrivilegedActionException) {
throw (e.cause as IOException?)!!
}
}
@Throws(IOException::class)
fun bind(socketChannel: SocketChannel, address: SocketAddress?) {
try {
AccessController.doPrivileged<Void>(PrivilegedExceptionAction<Void?> {
socketChannel.bind(address)
null
})
} catch (e: PrivilegedActionException) {
throw (e.cause as IOException?)!!
}
}
@Throws(IOException::class)
fun accept(serverSocketChannel: ServerSocketChannel): SocketChannel {
return try {
AccessController.doPrivileged(PrivilegedExceptionAction { serverSocketChannel.accept() })
} catch (e: PrivilegedActionException) {
throw (e.cause as IOException?)!!
}
}
@Throws(IOException::class)
fun bind(networkChannel: DatagramChannel, address: SocketAddress?) {
try {
AccessController.doPrivileged<Void>(PrivilegedExceptionAction<Void?> {
networkChannel.bind(address)
null
})
} catch (e: PrivilegedActionException) {
throw (e.cause as IOException?)!!
}
}
fun localSocketAddress(socket: ServerSocket): SocketAddress {
return AccessController.doPrivileged(PrivilegedAction { socket.localSocketAddress })
}
@Throws(UnknownHostException::class)
fun addressByName(hostname: String?): InetAddress {
return try {
AccessController.doPrivileged(PrivilegedExceptionAction { InetAddress.getByName(hostname) })
} catch (e: PrivilegedActionException) {
throw (e.cause as UnknownHostException?)!!
}
}
@Throws(UnknownHostException::class)
fun allAddressesByName(hostname: String?): Array<InetAddress> {
return try {
AccessController.doPrivileged(PrivilegedExceptionAction { InetAddress.getAllByName(hostname) })
} catch (e: PrivilegedActionException) {
throw (e.cause as UnknownHostException?)!!
}
}
fun socketAddress(hostname: String?, port: Int): InetSocketAddress {
return AccessController.doPrivileged(PrivilegedAction { InetSocketAddress(hostname, port) })
}
fun addressesFromNetworkInterface(intf: NetworkInterface): Enumeration<InetAddress> {
// Android seems to sometimes return null even if this is not a valid return value by the api docs.
// Just return an empty Enumeration in this case.
// See https://github.com/netty/netty/issues/10045
return AccessController.doPrivileged(PrivilegedAction { intf.inetAddresses })
?: return empty()
}
fun loopbackAddress(): InetAddress {
return AccessController.doPrivileged(PrivilegedAction {
return@PrivilegedAction InetAddress.getLoopbackAddress()
})
}
@Throws(SocketException::class)
fun hardwareAddressFromNetworkInterface(intf: NetworkInterface): ByteArray {
return try {
AccessController.doPrivileged(PrivilegedExceptionAction { intf.hardwareAddress })
} catch (e: PrivilegedActionException) {
throw (e.cause as SocketException?)!!
}
}
}