public KcpSession DetermineIsBadOrNewConnection(uint conv, IPEndPoint endPoint)
{
KcpSession session = null;
//2 包合法IP端口存在（老连接的数据） 这里还需要KCP底层继续校验 例如：SN号是否合法还应该考虑客户端如果IP没变但是端口变了（这个可能需要兼容）
//（这里暂时认为IP和端口号必须一致就OK，其他情况暂时认为都不合法）
if (conv == 0)
{
return(CheckingNewOrOld(endPoint));
}
else if (Sessions.TryGetValue(conv, out session)) //因为conv是uint 因此这里默认隐含 conv>0
{
if (session.Peer == endPoint) //暂时要求端口也必须一致
{
return(session);
}
else
{
//logger?.LogInformation($"Client:{kcpSession.IP} duplicate,cant Add to Session list!");
AddBad(endPoint);
return(null);
}
}
else
{
return(null);
}
}
private void OnRawReceive(Span <byte> data, IPEndPoint endPoint)
{
//检查黑名单
if (SessionMgr.InBad(endPoint))
{
return;
}
//检查格式
var(isBad, conv) = Kcp.IsBadHeadFormat(data);
if (isBad)
{
SessionMgr.AddBad(endPoint); return;
}
var session = SessionMgr.DetermineIsBadOrNewConnection(conv, endPoint);
if (session == null)
{
return;
}
KcpSession.KCPInput(session, data);
using var mem = _sock.GetMemory(OS._8kb);
var buff = mem.Memory.ToArray();
var rcnt = session.kcp.Recv(buff, 0, buff.Length);
if (rcnt > 0)
{
OnKcpReceive?.Invoke(session, buff.AsSpan().Slice(0, rcnt), endPoint);
}
}
public static void KCPInput(KcpSession session, Span <byte> data)
{
if (!session.Closed)
{
session.LastRevicedTime = DateTimeOffset.Now;
session.kcp.Input(data);
}
}
/// <summary>
/// 移除Session
/// </summary>
/// <param name="session2remove"></param>
public void Remove(KcpSession session)
{
if (Sessions.ContainsKey(session.SID))
{
ConList.Remove(session.Peer);
Sessions.Remove(session.SID);
SIDPool.Enqueue(session.SID);
}
}
private KcpSession AddNewSession(IPEndPoint endPoint)
{
var sid = SIDPool.Dequeue();
var news = KcpSession.CreateSvrSeesion(sid, endPoint, this);
Sessions.Add(sid, news);
ConList.Add(endPoint, news);
OnNew?.Invoke(news);
return(news);
}
private KcpClient(IPEndPoint svrIpPort)
{
KcpSession = KcpSession.CreateClientSession(svrIpPort);
_sock = KcpSocket.CreateClient(svrIpPort, OnRawReceive);
KcpSession.kcp.SetOutput((data, user) => {
if (!KcpSession.Closed)
{
_ = _sock.UdpSendToAsync(new Memory <byte>(data, 0, size), KcpSession.Peer);
}
});
_sock.OnUpdate += _sock_OnUpdate;
}
private void SessionMgr_OnNew(KcpSession session)
{
//新的连接
}