void udpServer_DataArrival(object sender, SockEventArgs e)
{
if (e.Data.Length < 29) return;//如果收到非法数据包则退出
//byte[] data = new byte[e.Count];
//Buffer.BlockCopy(e.Buffer, 0, data, 0, e.Count);
UDPFramePacket packet = new UDPFramePacket(e.Data);
if (packet.type == (byte)TransmitType.Audio || packet.type == (byte)TransmitType.Video)
{
//客户端请求与另一客户端打洞或请求转发文件数据包到另一客户端
IPEndPoint RemoteEP = new IPEndPoint(packet.RemoteIP, packet.Port);//获得消息接收者远程主机信息
udpServer.Send(RemoteEP, packet.BaseData);//将远程主机信息发送给客户端
}
else if (packet.type == (byte)TransmitType.getRemoteEP)//客户端请求获取自己的远程主机信息
{
packet.RemoteIP = e.RemoteIPEndPoint.Address;//设置客户端的远程IP
packet.Port = e.RemoteIPEndPoint.Port;//设置客户端的远程UDP 端口
udpServer.Send(e.RemoteIPEndPoint, packet.BaseData);//将远程主机信息发送给客户端
}
}
/// <summary>
/// 添加数据包到侦
/// </summary>
/// <param name="frame"></param>
public void Add(UDPFramePacket packet)
{
if (!FrameComplete)
{
Frame.Add(packet.PacketIndex, packet);
if (Frame.Count >= PacketCount)
FrameComplete = true;
}
}
/// <summary>
/// 设置远程主机信息
/// </summary>
/// <param name="remoteIP">远程主机（广域网）</param>
/// <param name="remoteLocalIP">远程主机（局域网）</param>
public void setRemoteIP(IPEndPoint remoteLocalIP, IPEndPoint remoteIP)
{
#region 网络打洞互联 时间计数器
int TimeCount = 0;
System.Timers.Timer timer1 = new System.Timers.Timer();
timer1.Interval = 500;
timer1.Enabled = true;
timer1.Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
{
TimeCount++;
if (toEP == null && TimeCount <= 20)//如果10秒后还未与对方建立联接
{
UDPFramePacket packet = new UDPFramePacket();
packet.type = (byte)TransmitType.Penetrate;//打洞数据包
packet.Block = new byte[1400];
if (sockUDP != null && sockUDP.Listened)
sockUDP.Send(remoteLocalIP, packet.ToBytes());//发送一次局域网正常打洞请求
UDPFramePacket packet1 = new UDPFramePacket();
packet1.type = (byte)TransmitType.Penetrate;//打洞数据包
packet1.Block = new byte[512];
if (sockUDP != null && sockUDP.Listened)
sockUDP.Send(remoteLocalIP, packet1.ToBytes());//发送一次局域网小包打洞请求
UDPFramePacket packet2 = new UDPFramePacket();
packet2.type = (byte)TransmitType.Penetrate;//打洞数据包
packet2.Block = new byte[1400];
if (sockUDP != null && sockUDP.Listened)
sockUDP.Send(remoteIP, packet2.ToBytes());//发送一次广域网打洞请求
UDPFramePacket packet3 = new UDPFramePacket();
packet3.type = (byte)TransmitType.Penetrate;//打洞数据包
packet3.Block = new byte[512];
if (sockUDP != null && sockUDP.Listened)
sockUDP.Send(remoteIP, packet3.ToBytes());//发送一次广域网小包打洞请求
}
else
{
//终止发送，并触发获得主机事件
timer1.Enabled = false;
timer1.Dispose();
timer1 = null;
if (toEP != null)//如果已与对方打洞成功并建立连接
{
if (TimeCount <= 10)
{
connectedType = ConnectedType.UDPLocal;//标明是局域网连接
Console.WriteLine("局域网打洞成功，MTU=" + mtu.ToString() + ",打洞次数：" + TimeCount.ToString());
}
else
{
connectedType = ConnectedType.UDPRemote;//标明是广域网连接
Console.WriteLine("广域网打洞成功，MTU=" + mtu.ToString() + "，打洞次数：" + TimeCount.ToString());
}
}
else//打洞超时，数据只能通过服务器中转
{
Console.WriteLine("局域网打洞不成功，打洞次数：：" + TimeCount.ToString());
mtu = 1400;
toEP = remoteIP;//将对方的广域网远程主机信息记录下来
}
OnTransmitConnected();//触发连接建立事件
}
};
#endregion
}
/// <summary>
/// 开始
/// </summary>
public void Start()
{
if (sockUDP != null) return;//如果已经初始化套接字 ，则退出
if (sockUDP == null)
{
sockUDP = new SockUDP();
sockUDP.DataArrival += new SockUDP.UDPEventHandler(sockUDP_DataArrival);
sockUDP.Listen(0);//随机侦听
}
IPEndPoint myLocalEP = null;
System.Net.IPAddress[] ips = System.Net.Dns.GetHostAddresses(System.Net.Dns.GetHostName());//获得本机局域网IPV4地址
for (int i = ips.Length - 1; i >= 0; i--)
{
if (ips[i].GetAddressBytes().Length == 4)
{
myLocalEP = new IPEndPoint(ips[i], sockUDP.ListenPort);//获得本机局域网地址
break;
}
}
UDPFramePacket packet = new UDPFramePacket();
packet.type = (byte)TransmitType.getRemoteEP;//获得公网主机信息
packet.PacketCount = 1;
sockUDP.Send(ServerEP, packet.BaseData);
#region 主机信息获取 时间计数器
int TimeCount = 0;
System.Timers.Timer timer1 = new System.Timers.Timer();
timer1.Interval = 500;
timer1.Enabled = true;
timer1.Elapsed += delegate(object sender, System.Timers.ElapsedEventArgs e)
{
if (myRemoteEP == null && TimeCount < 10)//如果还未获得本机远程主机信息
{
sockUDP.Send(ServerEP, packet.BaseData);//每隔500毫秒发送一次请求
}
else//如果三秒内已经获得主机信息或三秒钟后未获得主机信息
{
//终止发送，并触发获得主机事件
timer1.Enabled = false;
timer1.Dispose();
timer1 = null;
if (myRemoteEP == null)//如果超时未获得本机远程主机信息
myRemoteEP = myLocalEP;//假设本机的远程IP等于本地IP
OnGetIPEndPoint(this, myLocalEP, myRemoteEP);//触发获取本机主机事件
}
TimeCount++;
};
#endregion
///开始组包线程
videoThread = new System.Threading.Thread(new System.Threading.ThreadStart(VideoDecoderThread));
videoThread.Start();
}
/// <summary>
/// 发送数据包
/// </summary>
/// <param name="type"></param>
/// <param name="data"></param>
public void sendData(TransmitType type, byte[] data)
{
if (data == null || data.Length == 0) return;
SendTimestamp++;
UDPFramePacket packet = new UDPFramePacket();
packet.type = (byte)type;
packet.Timestamp = SendTimestamp;
packet.Block = data;
send(packet.ToBytes());
return;
if (data.Length <= mtu)
{
packet.PacketCount = 1;
packet.Block = data;
send(packet.ToBytes());
Console.WriteLine(packet.type.ToString() + ":" + packet.ToBytes().Length.ToString());
}
else
{
int count = data.Length / mtu;
if (data.Length % mtu != 0)
count += 1;
int offSet = 0;
byte[] block = new byte[mtu];
for (int i = 0; i < count; i++)
{
packet.PacketCount = count;
packet.PacketIndex = i;
if (offSet + mtu > data.Length)
block = new byte[data.Length - offSet];//要发送的缓冲区
Buffer.BlockCopy(data, offSet, block, 0, block.Length);
packet.Block = block;
send(packet.ToBytes());
offSet += mtu;
Console.WriteLine( packet.type.ToString() +":"+ packet.ToBytes().Length.ToString());
}
}
}
private void sockUDP_DataArrival(object sender, SockEventArgs e)
{
if (e.Data.Length < 29) return;
UDPFramePacket packet = new UDPFramePacket(e.Data);//获得一侦数据的一个包
if (packet.type == (byte)TransmitType.Video || packet.type == (byte)TransmitType.Audio)//收到音频视频数据包
{
if (packet.type == (byte)TransmitType.Video)//触发视频数据到达事件
OnRecVideoData(this, packet.Block );
else if (packet.type == (byte)TransmitType.Audio)//触发音频数据到达事件
OnRecAudioData(this, packet.Block);
return;
if (packet.PacketCount >0 && packet.PacketCount <33)//最大32个数据包
{
lock (ReceiverFrames)
{
if (ReceiverFrames.ContainsKey(packet.Timestamp))//如果侦已经存在
{
frame f = ReceiverFrames[packet.Timestamp];
f.Add(packet);//将包添加到侦
}
else
{
frame f = new frame();//创建侦
f.Add(packet);//将包添加到侦
f.dateTime = DateTime.Now;
f.type = packet.type;//设置侦类型
f.Timestamp = packet.Timestamp;//设置时间戳
f.PacketCount = packet.PacketCount;//设置侦的包总数
ReceiverFrames.Add(packet.Timestamp, f);//添加侦
}
}
}
}
else if (packet.type == (byte)TransmitType.Penetrate)//收到另一客户端请求打洞
{
toEP = e.RemoteIPEndPoint;
if (packet.Block.Length > mtu)//确定MTU值
mtu = packet.Block.Length;
if (connectedType == ConnectedType.None)//如果还未连接，继续打洞
sockUDP.Send(toEP, packet.BaseData);//告之对方收到打洞包并向对方打洞
}
else if (packet.type == (byte)TransmitType.getRemoteEP)//收到自己的远程主机信息
{
if (myRemoteEP == null)
myRemoteEP = new IPEndPoint(packet.RemoteIP, packet.Port);//设置自己的远程主机信息
}
}
