🚀 go-pugleaf

kbennett@cpcug.org (Keith Bennett) writes:

>The following questions pertain to programming sockets using
>IBM's TCP/IP for OS/2 version 2.0 (UN 64092).  Our app is
>running under OS/2 2.1 (not 2.11) and we hope to eventually
>upgrade to Warp.

>We have found that when doing a blocking read (recv()) on a
>socket, the read will not return if the machine on the other end
>of the socket has been switched off or rebooted.  (Despite our

(...)

You need to set keepalive option by using setsockopt(). The default keepalive
timer for IBM TCP/IP is 120 mins (Yes! It's 2 Hr). This is because it's
ported from BSD NET/2 TCP/IP stack! However, since CSD UN56402, IBM add
a new utility, call inetcfg.exe. You have to run it right after TCP/IP is
initialized by giving following commands
	inetcfg keepalive=minute
where "minute" is the new keepalive timer in minute, it's a value from
0 to 120. This will apply to all the tcp connection started afterward.

I have been used for quite a while and it worked just fine.

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	Frankie Fan    			Internet: kfan@netcom.com
	Author of OS2HTTPD - WWW Server for OS/2
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