TCP KEEP_ALIVE

Hi,

OK it works fine. The main difference with "standard" code that I could seen, is the need to set IPPROTO_TCP in the socket function call (instead of 0).

For convenience, I give the final code that works fine :

<div class='quotetop'>QUOTE </div>

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if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)

{

TRACE_CONNECT "Error : cannot create the control socket\n");

return -1;

}

/* Set options of that socket */

sockval = TCP_KEEPIDLE_VALUE;

if (setsockopt (fd, SOL_TCP, TCP_KEEPIDLE, (void *)&sockval, sizeof(sockval)) == -1)

{

TRACE_CONNECT "Warning : TCP_KEEPIDLE option set failed\n");

}

sockval = TCP_KEEPCNT_VALUE;

if (setsockopt (fd, SOL_TCP, TCP_KEEPCNT, (void *)&sockval, sizeof(sockval)) == -1)

{

TRACE_CONNECT "Warning : TCP_KEEPCNT option set failed\n");

}

sockval = TCP_KEEPINTVL_VALUE;

if (setsockopt(fd, SOL_TCP, TCP_KEEPINTVL, &sockval, sizeof(sockval)) == -1)

{

TRACE_CONNECT "Warning : TCP_KEEPINTVL option set failed\n");

}

sockval = SO_KEEPALIVE_VALUE;

if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, &sockval, sizeof(sockval)) == -1)

{

TRACE_CONNECT "Warning : KeepAlive option set failed\n");

}

/* Permanent try of connection */

while (1)

{

memset(&adsock_server, 0, sizeof(adsock_server));

adsock_server.sin_family = AF_INET;

adsock_server.sin_port = htons(TCPPort);

adsock_server.sin_addr.s_addr = htonl(IPAddress);

if (connect(fd, (struct sockaddr *)&adsock_server, sizeof(adsock_server)) == -1)

{

TRACE_CONNECT "Warning : connection to server failed\n");

}[/b]

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