StunMessage Query(ISocketClient client, StunMessage request, IPEndPoint remoteEndPoint)
{
Packet pk = null;
try
{
if (client.Local.IsTcp)
{
// Tcp协议不支持更换IP或者端口
if (request.ChangeIP || request.ChangePort)
{
return(null);
}
//if (!client.Connected) client.Connect(remoteEndPoint);
//client.Send(request.ToArray());
}
//else
// client.SendTo(request.ToArray(), remoteEndPoint);
WriteLog("查询 {0} =>{1}", request, remoteEndPoint);
client.Remote.EndPoint = remoteEndPoint;
client.Send(request.ToArray());
pk = client.Receive();
if (pk == null || pk.Count == 0)
{
return(null);
}
}
catch { return(null); }
var rs = StunMessage.Read(pk.GetStream());
//if (rs != null && rs.Type != StunMessageType.BindingResponse) return null;
if (rs == null)
{
return(null);
}
// 不是同一个会话不要
if (rs.TransactionID.CompareTo(request.TransactionID) != 0)
{
return(null);
}
// 不是期望的响应不要
if (rs.Type != (StunMessageType)((UInt16)request.Type | 0x0100))
{
return(null);
}
return(rs);
}
/// <summary>接收到数据时</summary>
/// <param name="session"></param>
/// <param name="pk"></param>
protected override void OnReceive(INetSession session, Packet pk)
{
if (pk.Total > 0)
{
var remote = session.Remote;
//if (remote == null && session != null) remote = session.RemoteEndPoint;
var request = StunMessage.Read(pk.GetStream());
WriteLog("{0} {1} {2}{3}", request.Type, remote, request.ChangeIP ? " ChangeIP" : "", request.ChangePort ? " ChangePort" : "");
// 如果是兄弟服务器发过来的，修正响应地址
switch (request.Type)
{
case StunMessageType.BindingRequest:
//case StunMessageType.BindingResponse:
request.Type = StunMessageType.BindingRequest;
if (request.ResponseAddress != null)
{
remote.EndPoint = request.ResponseAddress;
}
break;
case StunMessageType.SharedSecretRequest:
//case StunMessageType.SharedSecretResponse:
request.Type = StunMessageType.SharedSecretRequest;
if (request.ResponseAddress != null)
{
remote.EndPoint = request.ResponseAddress;
}
break;
default:
break;
}
// 是否需要发给伙伴
if (request.ChangeIP)
{
//if (Partner != null && !Partner.Equals(session.Host.LocalEndPoint.GetRelativeEndPoint(Partner.Address)))
//{
// // 发给伙伴
// request.ChangeIP = false;
// // 记住对方的地址
// request.ResponseAddress = remote.EndPoint;
// //session.Send(request.GetStream(), Partner);
// var us = session.Host as UdpServer;
// if (us != null)
// {
// //us.CreateSession(Partner).Send(request.GetStream());
// us.Send(request.GetStream(), Partner);
// }
// return;
//}
// 如果没有伙伴地址，采用不同端口代替
request.ChangePort = true;
}
// 开始分流处理
switch (request.Type)
{
case StunMessageType.BindingRequest:
//case StunMessageType.BindingResponse:
OnBind(request, session.Session);
break;
case StunMessageType.SharedSecretRequest:
break;
default:
break;
}
}
}