大橙子网站建设,新征程启航

为企业提供网站建设、域名注册、服务器等服务

go语言如何判断tcp是否断开

go语言如何判断tcp是否断开?针对这个问题,这篇文章给出了相对应的分析和解答,希望能帮助更多想解决这个问题的朋友找到更加简单易行的办法。

创新互联公司坚持“要么做到,要么别承诺”的工作理念,服务领域包括:网站建设、成都网站建设、企业官网、英文网站、手机端网站、网站推广等服务,满足客户于互联网时代的海晏网站设计、移动媒体设计的需求,帮助企业找到有效的互联网解决方案。努力成为您成熟可靠的网络建设合作伙伴!

keepalive检测,对于设置了keepalive来说,当tcp检测到对端socket不再可用时(不能发出探测包,或探测包没有收到ACK的响应包),select会返回socket可读,并且在recv时返回-1,同时置上errno为ETIMEDOUT。此时TCP的状态是断开的。

struct TCP_KEEPALIVE {  
    unsigned long onoff;  
    unsigned long keepalivetime;  
    unsigned long keepaliveinterval;  
} ;  
  
#define SIO_KEEPALIVE_VALS _WSAIOW(IOC_VENDOR,4)  
  
/* KeepAlive实现 */  
void set_keepalive (SOCKET s)  
{  
    BOOL bKeepAlive = TRUE;  
    int nRet = ::setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char*)&bKeepAlive, sizeof(bKeepAlive));  
    if (nRet == SOCKET_ERROR)  
    {  
        return ;  
    }  
    /* 输入参数 */  
    struct TCP_KEEPALIVE inKeepAlive = {0};   
    unsigned long ulInLen = sizeof(struct TCP_KEEPALIVE);  
  
    /* 输出参数 */  
    struct TCP_KEEPALIVE outKeepAlive = {0};   
    unsigned long ulOutLen = sizeof(struct TCP_KEEPALIVE);  
    unsigned long ulBytesReturn = 0;  
    int ret = 0;  
  
    /* 设置keepalive 为5秒,并且发送次数为3次 */  
    inKeepAlive.onoff             = 1;  
    /* 2次keepalive探测间隔时间 */  
    inKeepAlive.keepaliveinterval = 5000;   
    /* 开始首次keepalive探测前的tcp空闲时间 */  
    inKeepAlive.keepalivetime     = 5000;   
  
    ret = WSAIoctl((unsigned int)s,  
            SIO_KEEPALIVE_VALS,  
            (LPVOID)&inKeepAlive,   
            ulInLen,  
            (LPVOID)&outKeepAlive,   
            ulOutLen,  
            &ulBytesReturn,   
            NULL,   
            NULL);  
    if (ret == SOCKET_ERROR)  
    {  
        printf ("error: %d\n", WSAGetLastError());  
    }  
}

看完这篇文章,你们学会go语言判断tcp是否断开的方法了吗?如果还想学到更多技能或想了解更多相关内容,欢迎关注创新互联行业资讯频道,感谢各位的阅读。


网页标题:go语言如何判断tcp是否断开
网址分享:http://dzwzjz.com/article/ppjoec.html
在线咨询
服务热线
服务热线:028-86922220
TOP