| /* |
| * 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.v5.internal.handler |
| |
| import org.apache.tuweni.bytes.Bytes |
| import org.apache.tuweni.devp2p.v5.MessageHandler |
| import org.apache.tuweni.devp2p.v5.UdpConnector |
| import org.apache.tuweni.devp2p.v5.packet.FindNodeMessage |
| import org.apache.tuweni.devp2p.v5.packet.NodesMessage |
| import java.net.InetSocketAddress |
| |
| class FindNodeMessageHandler : MessageHandler<FindNodeMessage> { |
| |
| override fun handle(message: FindNodeMessage, address: InetSocketAddress, srcNodeId: Bytes, connector: UdpConnector) { |
| val nodes = connector.getNodesTable().nodesOfDistance(message.distance) |
| |
| var caret = 0 |
| while (caret < nodes.size) { |
| val response = NodesMessage(message.requestId, nodes.size, nodes.subList(caret, caret + MAX_NODES_IN_RESPONSE)) |
| connector.send(address, response, srcNodeId) |
| caret += MAX_NODES_IN_RESPONSE |
| } |
| } |
| |
| companion object { |
| private const val MAX_NODES_IN_RESPONSE: Int = 16 |
| } |
| } |