| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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 org.apache.tuweni.devp2p |
| |
| import org.apache.tuweni.rlp.RLPException |
| import org.apache.tuweni.rlp.RLPReader |
| import org.apache.tuweni.rlp.RLPWriter |
| import java.net.InetAddress |
| import java.net.InetSocketAddress |
| import java.net.UnknownHostException |
| |
| private fun parseInetAddress(address: String): InetAddress { |
| require(Character.digit(address[0], 16) != -1 || address[0] == ':') { |
| "address should be a literal IP address, got $address" |
| } |
| return InetAddress.getByName(address) |
| } |
| |
| /** |
| * An Ethereum node endpoint. |
| * |
| * @constructor Create a new endpoint. |
| * @param address the InetAddress |
| * @param udpPort the UDP port for the endpoint |
| * @param tcpPort the TCP port for the endpoint or `null` if no TCP port is known |
| * @throws IllegalArgumentException if either port is out of range |
| */ |
| data class Endpoint( |
| val address: InetAddress, |
| val udpPort: Int = DEFAULT_PORT, |
| val tcpPort: Int? = null |
| ) { |
| |
| /** |
| * Create a new endpoint. |
| * |
| * @param address the IP string literal |
| * @param udpPort the UDP port for the endpoint |
| * @param tcpPort the TCP port for the endpoint or `null` if no TCP port is known |
| * @throws IllegalArgumentException if the address isn't an IP address, or either port is out of range |
| */ |
| constructor(address: String, udpPort: Int = DEFAULT_PORT, tcpPort: Int? = null) : |
| this(parseInetAddress(address), udpPort, tcpPort) |
| |
| /** |
| * Create a new endpoint. |
| * |
| * @param address an InetSocketAddress, containing the IP address the UDP port |
| */ |
| constructor(address: InetSocketAddress, tcpPort: Int? = null) : this(address.address, address.port, tcpPort) |
| |
| companion object { |
| |
| /** |
| * The default port used by Ethereum DevP2P. |
| */ |
| const val DEFAULT_PORT = 30303 |
| |
| /** |
| * Create an Endpoint by reading fields from the RLP input stream. |
| * |
| * If the fields are wrapped into an RLP list, use `reader.readList` to unwrap before calling this method. |
| * |
| * @param reader the RLP input stream from which to read |
| * @return the decoded endpoint |
| * @throws RLPException if the RLP source does not decode to a valid endpoint |
| */ |
| fun readFrom(reader: RLPReader): Endpoint { |
| val addr: InetAddress |
| try { |
| addr = InetAddress.getByAddress(reader.readValue().toArrayUnsafe()) |
| } catch (e: UnknownHostException) { |
| throw RLPException(e) |
| } |
| |
| val udpPort = reader.readInt() |
| |
| // Some implementations seem to send packets that either do not have the TCP port field, or to have an |
| // RLP NULL value for it. |
| var tcpPort: Int? = null |
| if (!reader.isComplete) { |
| tcpPort = reader.readInt() |
| if (tcpPort == 0) { |
| tcpPort = null |
| } |
| } |
| |
| return Endpoint(addr.hostAddress, udpPort, tcpPort) |
| } |
| } |
| |
| init { |
| require(udpPort in 1..65535) { "udpPort should be between 1 and 65535, got $udpPort" } |
| require(tcpPort == null || tcpPort in 1..65535) { "tcpPort should be between 1 and 65535, got $tcpPort" } |
| } |
| |
| val udpSocketAddress: InetSocketAddress = InetSocketAddress(address, udpPort) |
| val tcpSocketAddress: InetSocketAddress? = if (tcpPort != null) InetSocketAddress(address, tcpPort) else null |
| |
| /** |
| * Write this endpoint to an RLP output. |
| * |
| * @param writer the RLP writer |
| */ |
| internal fun writeTo(writer: RLPWriter) { |
| writer.writeByteArray(address.address) |
| writer.writeInt(udpPort) |
| writer.writeInt(tcpPort ?: 0) |
| } |
| |
| // rough over-estimate, assuming maximum size encoding for the port numbers |
| internal fun rlpSize(): Int = 1 + address.address.size + 2 * (1 + 2) |
| } |