| /* |
| * 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.bytes.Bytes |
| import org.apache.tuweni.crypto.SECP256K1 |
| import java.net.URI |
| import java.util.regex.Pattern |
| |
| private val DISCPORT_QUERY_STRING_REGEX = Pattern.compile(".*discport=([^&]+).*") |
| |
| /** |
| * The components of an enode URI. |
| */ |
| data class EnodeUriComponents(val nodeId: SECP256K1.PublicKey, val endpoint: Endpoint) |
| |
| /** |
| * Parse an enode URI. |
| * |
| * @return the node id and the endpoint |
| * @throws IllegalArgumentException if the uri is not a valid enode URI |
| */ |
| fun parseEnodeUri(uri: URI): EnodeUriComponents { |
| require("enode" == uri.scheme) { "URI must be an enode:// uri" } |
| require(uri.userInfo != null) { "URI must have a node id" } |
| val nodeId = SECP256K1.PublicKey.fromBytes(Bytes.fromHexString(uri.userInfo)) |
| |
| var tcpPort = Endpoint.DEFAULT_PORT |
| if (uri.port >= 0) { |
| tcpPort = uri.port |
| } |
| |
| // If TCP and UDP ports differ, expect a query param 'discport' with the UDP port. |
| // See https://github.com/ethereum/wiki/wiki/enode-url-format |
| var udpPort = tcpPort |
| val query = uri.query |
| if (query != null) { |
| val matcher = DISCPORT_QUERY_STRING_REGEX.matcher(query) |
| if (matcher.matches()) { |
| try { |
| udpPort = Integer.parseInt(matcher.group(1)) |
| } catch (e: NumberFormatException) { |
| throw IllegalArgumentException("Invalid discport query parameter") |
| } |
| } |
| } |
| |
| return EnodeUriComponents( |
| nodeId, |
| Endpoint(uri.host, udpPort, tcpPort) |
| ) |
| } |