From an old server program, the only one we ever turned keepalive on
for.
Eval Rc = setsockopt(sd: sol_socket
: so_keepal
: %addr(optval)
: %size(optval))
sd is the socket descriptor we got from the call to socket.
The program I cut the above code from is really old. Here is the current
definition in my copybook.
D* keep connections alive
D SO_KEEPALIVE C 25
D* socket layer
D SOL_SOCKET C CONST(-1)
d optval s 10u 0 inz(1)
CHGTCPA has the setting to control the interval.
Change TCP/IP Attributes (CHGTCPA)
Type choices, press Enter.
TCP keep alive . . . . . . . . . 5 1-40320, *SAME, *DFT
The help for that option.
TCP keep alive (TCPKEEPALV) - Help
Specifies the amount of time, in minutes, that TCP waits
before sending out a probe to the other side of a
connection. The probe is sent when the connection is
otherwise idle, even when there is no data to be sent.
The transmission of keep-alive packets is controlled by
individual sockets applications through use of the
SO_KEEPALIVE socket option. For more information see the
Socket programming topic collection in the IBM i
Information Center at
http://www.ibm.com/systems/i/infocenter/.
Kevin Bucknum
Senior Programmer Analyst
MEDDATA/MEDTRON
Tel: 985-893-2550
-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff
Young
Sent: Wednesday, September 02, 2015 1:20 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Socket Keepalive
In a previous post, it was recommended that I use the SO_KEEPALIVE in
the setsockopt to enable my program to use this.
I have not been able to find any good example on how to set this and how
to configure the keepalive interval.
Does anyone have an example of this that I can refer to?
Jeff Young
Sr. Programmer Analyst
--
This is the RPG programming on the IBM i (AS/400 and iSeries) (RPG400-L)
mailing list To post a message email: RPG400-L@xxxxxxxxxxxx To
subscribe, unsubscribe, or change list options,
visit:
http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives at
http://archive.midrange.com/rpg400-l.
midrange.com
