//接收回调
private void AcceptCallBack(IAsyncResult ar)
{
try
{
Socket socket = listenSocket.EndAccept(ar);
int index = GetIndex();
if (index < 0)
{
socket.Close();
Console.WriteLine("服务器连接已满，请稍候再试");
}
else
{
ConnectClient client = clientList[index];
client.Init(socket);
client.socket.BeginReceive(client.readBuff, client.bufferCount, client.BufferRemain(), SocketFlags.None, ReceiveCallBack, client);
Console.WriteLine("客户端连接成功 = " + client.Address());
}
//重新开始异步接收请求
listenSocket.BeginAccept(AcceptCallBack, null);
}
catch (Exception e)
{
Console.WriteLine("客户端请求异常! Exception = " + e.Message);
}
}
/// <summary>
/// 从连接池中 获取客户端连接对象 ，如果列表中以满 则获取失败
/// </summary>
/// <returns></returns>
public int GetIndex()
{
//如果连接池为空 则新建连接池 返回第一个连接对象
if (clientList == null)
{
clientList = new ConnectClient[maxClient];
clientList[0] = new ConnectClient();
return(0);
}
else
{
//遍历连接池 ， 返回未使用连接对象的索引
for (int i = 0; i < clientList.Length; i++)
{
if (clientList[i] == null)
{
clientList[i] = new ConnectClient();
return(i);
}
else if (clientList[i].isUse == false)
{
return(i);
}
}
//如果都有对象且在使用中，则返回-1. 代表获取失败
return(-1);
}
}
//返回回调
private void ReceiveCallBack(IAsyncResult ar)
{
ConnectClient client = (ConnectClient)ar.AsyncState;
try
{
int count = client.socket.EndReceive(ar);
//断开连接
if (count <= 0)
{
Console.WriteLine("断开连接 = " + client.Address());
client.Close();
}
else
{
string receiveString = System.Text.Encoding.UTF8.GetString(client.readBuff, 0, count);
Console.WriteLine("接收 " + client.Address() + " 的数据 = " + receiveString);
byte[] sendBytes = System.Text.Encoding.UTF8.GetBytes(client.Address() + " : " + receiveString);
//广播信息
for (int i = 0; i < clientList.Length; i++)
{
if (clientList[i] == null)
{
continue;
}
if (clientList[i].isUse == false)
{
continue;
}
clientList[i].socket.Send(sendBytes);
Console.WriteLine("广播 " + client.Address() + " 的数据 给 " + clientList[i].Address());
}
}
//继续接收数据
client.socket.BeginReceive(client.readBuff, client.bufferCount, client.BufferRemain(), SocketFlags.None, ReceiveCallBack, client);
}
catch (Exception e)
{
Console.WriteLine("[接收数据异常] client = " + client.Address());
Console.WriteLine(" Execption = " + e.Message);
client.Close();
}
}