Check the TCP connection still active

Thank you Chris72 of your interest.

I have found some start of way in :

/altera.components/Nios II Software Packages/altera_iniche/UCOSII/src/tcp/tcp_timr.h

There are few# define like :

#define  TCPTV_KEEP_INIT   (75*PR_SLOWHZ)       /* initial connect keep alive */
# define  TCPTV_KEEP_IDLE   (120*60*PR_SLOWHZ)   /* dflt time before probing */
# define  TCPTV_KEEPINTVL   (75*PR_SLOWHZ)       /* default probe interval */
# define  TCPTV_KEEPCNT     8                    /* max probes before drop */

I'have try to change the TCPTV_KEEP_IDLE value to 5*60 (from 2h to 5 minutes)

and add the lines :

if (setsockopt(fd_listen, SOL_SOCKET, SO_KEEPALIVE, &sockval, sizeof(sockval)) == -1)
{
	printf("Warning : KeepAlive option set failed\n");
}

after the socket() call.

But it doesn't work, or not like i hope.

To be countinued...