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.SequenceEqual(request.TransactionID))
{
return(null);
}
// 不是期望的响应不要
if (rs.Type != (StunMessageType)((UInt16)request.Type | 0x0100))
{
return(null);
}
return(rs);
}
StunMessage Query(ISocketClient client, StunMessage request, IPEndPoint remoteEndPoint)
{
Byte[] buffer = 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());
buffer = client.Receive();
if (buffer == null || buffer.Length == 0)
{
return(null);
}
}
catch { return(null); }
var rs = StunMessage.Read(new MemoryStream(buffer));
//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>绑定</summary>
/// <param name="request"></param>
/// <param name="session"></param>
/// <returns></returns>
protected void OnBind(StunMessage request, ISocketSession session)
{
var rs = new StunMessage
{
Type = StunMessageType.BindingResponse,
TransactionID = request.TransactionID.ReadBytes(),
MappedAddress = session.Remote.EndPoint
};
//rs.SourceAddress = session.GetRelativeEndPoint(remote.Address);
if (Public != null)
{
if (session.Local.IsTcp)
{
rs.SourceAddress = Public[session.Port + 100000];
}
else
{
rs.SourceAddress = Public[session.Port];
}
}
// 找另一个
ISocketSession session2 = null;
var anotherPort = 0;
for (var i = 0; i < Servers.Count; i++)
{
var server = Servers[i];
if (server.Local.Type == session.Local.Type && server.Local.Port != session.Local.Port)
{
anotherPort = server.Port;
if (server.Local.IsTcp)
{
break;
}
else
{
session2 = (server as UdpServer).CreateSession(session.Remote.EndPoint);
if (session2 != null)
{
break;
}
}
}
}
//rs.ChangedAddress = Partner ?? session2.GetRelativeEndPoint(remote.Address);
if (Public != null)
{
if (session.Local.IsTcp)
{
rs.ChangedAddress = Partner ?? Public[anotherPort + 100000];
}
else
{
rs.ChangedAddress = Partner ?? Public[anotherPort];
}
}
var name = Name;
if (name == GetType().Name)
{
name = GetType().FullName;
}
rs.ServerName = String.Format("{0} v{1}", name, AssemblyX.Create(Assembly.GetExecutingAssembly()).CompileVersion);
// 换成另一个
if (request.ChangePort)
{
session = session2;
}
session.Send(rs.ToArray());
}
