第一步:在opt.h中 LWIP_TCP_KEEPALIVE 置1 1 /** 2 * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT 3 * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set 4 * in seconds. (does not require sockets.c, and will affect tcp.c) ...
1、保证LWIP_TCP_KEEPALIVE被定义为1,(这样TCP_KEEPIDLE、TCP_KEEPINTVL和TCP_KEEPCNT 设置才有效) 2、 int32 keepalive = 1; int32 keepidle = 1; int32 keepinterval = 1; int32 keepcount = 1; int32 flag = 1; if(setsockopt(server_socket, SOL_SOCKET, SO_KEEPALIVE, (void *)&keepalive, ...
第一步:在opt.h中 LWIP_TCP_KEEPALIVE 置1 1/**2* LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT3* options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set4* in seconds. (does not require sockets.c, and will affect tcp.c)5*/6#if!
第一步:在opt.h中 LWIP_TCP_KEEPALIVE 置1 /** * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set * in seconds. (does not require sockets.c, and will affect tcp.c)*/#if!define...
你傻啊，keepalive是保持活动的意思。意思就是说，不要关闭tcp。为了实现这项功能，带有keepalive的TCP,...
把LWIP中的keepalive功能打开之后,如果协议栈检测到TCP长时间不再发送数据就会把连接断开。如果我在网络正常通信的情况下突然拔掉网线,等到协议栈把TCP连接断开后,再插上网线,但是却不能重新连接之前的TCP,怎么才能让原先的TCP重新连接进行通信呢,谁有好一点的方法?? 0 2020-4-6 04:36:18 评论 淘帖 邀请回答...
TCP keepalive的详解(解惑)--转 2019-12-09 17:20 −TCP是面向连接的,一般情况,两端的应用程序可以通过发送和接收数据得知对端的存活。当两端的应用程序都没有数据发送和接收时,如何判断连接是否正常呢? 这就是SO_KEEPALIVE的作用。 1. SO_KEEPALIVE 的作用 1.1 SO_KEEPALIVE的定义 SO_KEEPALIVE用于开启或...
> What puzzles me is that neither slow or fast timer are firing which is where > KeepAlive action is detected and performed ! That would be a problem of your port, I guess. > > I am using lwIP 1.3.0 which is what AVR32 Studio had shipped. ...
I'm not aware of there ever having been a FreeRTOS port in the lwIP distribution. There are several ports on the web, and a few (old) ports in the FreeRTOS download itself, but these are just 'demo' quality. Regards, Richard. ...
第一步:在opt.h中 LWIP_TCP_KEEPALIVE 置1 /** * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set * in seconds. (does not require sockets.c, and will affect tcp.c)*/#if!define...