org.aotorrent.common.protocol.tracker.UDPAnnounceReply.java Source code

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Here is the source code for org.aotorrent.common.protocol.tracker.UDPAnnounceReply.java

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/*
 * Copyright 2014 Napolov Dmitry
 *
 * 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.
 */

package org.aotorrent.common.protocol.tracker;

import com.google.common.primitives.Ints;
import io.netty.buffer.ByteBuf;
import org.aotorrent.common.protocol.ProtocolException;

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author dmitry 17.08.14 15:26
 */
public class UDPAnnounceReply {

    private final static int action = 1;
    private final int interval;
    private final List<InetSocketAddress> peers;
    private int transactionId;

    public UDPAnnounceReply(ByteBuf in) throws ProtocolException, UnknownHostException {
        int length = in.readableBytes();
        int action = in.readInt();
        if (action != UDPAnnounceReply.action || length < 20) {
            throw new ProtocolException("Invalid packet");
        }

        transactionId = in.readInt();
        interval = in.readInt();
        in.readInt(); //leechers
        in.readInt(); //seeders

        final int peerCount = in.readableBytes() / 6;

        peers = new ArrayList<>(peerCount);

        for (int i = 0; i < peerCount; i++) {
            int ip = in.readInt();
            int port = in.readUnsignedShort();
            InetAddress inetAddress = InetAddress.getByAddress(Ints.toByteArray(ip));
            peers.add(new InetSocketAddress(inetAddress, port));
        }

    }

    public int getTransactionId() {
        return transactionId;
    }

    public int getInterval() {
        return interval;
    }

    public List<InetSocketAddress> getPeers() {
        return peers;
    }
}