积极加强网站建设/seo如何进行优化

当服务端开启心跳，客户端开启心跳，则当客户端意外断开连接，服务端释放连接，客户端释放连接

当服务端关闭心跳，客户端开启心跳，则当客户端意外断开连接，服务端不会知道，资源不会释放。而当客户端再一次向服务端请求连接的时候，服务端才会释放之前的socket

linux :

socket 配置

      int optval;
      socklen_t optlen = sizeof(optval);
      optval = 1;  
      setsockopt(clt_sock, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen);  
      optval = 5;  
      setsockopt(clt_sock, SOL_TCP, TCP_KEEPCNT, &optval, optlen);  
      optval = 1;  
      setsockopt(clt_sock, SOL_TCP, TCP_KEEPIDLE, &optval, optlen);  
      optval = 1;  
      setsockopt(clt_sock, SOL_TCP, TCP_KEEPINTVL, &optval, optlen);

echo 600 > /proc/sys/net/ipv4/tcp_keepalive_time

echo 60 > /proc/sys/net/ipv4/tcp_keepalive_intvl

echo 6 > /proc/sys/net/ipv4/tcp_keepalive_probes

windows:

socket 配置

int Opt=1;
TCP_KEEPALIVE live,liveout;
live.keepaliveinterval=500;  
live.keepalivetime=3000;  
live.onoff=TRUE;    
int iRet = setsockopt(serSocket,SOL_SOCKET,SO_KEEPALIVE,(char *)Opt,sizeof(int));    
if(iRet == 0){  
DWORD dw;  
if(WSAIoctl(serSocket,SIO_KEEPALIVE_VALS,  
&live,sizeof(live),&liveout,sizeof(liveout),  
&dw,NULL,NULL)== SOCKET_ERROR){  
//Delete Client    
return 0;  
}    
}