RE: General socket question: Would server knows the connection hasbeenbroken if client drop the connection without calling close()

I've no control over the server job.  It is a third party software.  But
the client basically trying to connect to a paging terminal.  

The client program is a basic RPG program that uses socket apis to talk
to server.

The server is a terminal that talk to client uses tcp or x.25 protocol.
(For x.25 protocol, we use CISCO router for client to talk TCP and CISCO
router then talk to terminal using x.25).

Clear the port:  If this is a CISCO router, the network group will logon
to the router and clear the line/port (I'm not really sure what they
do).  

The basic question I've is that how come the server doesn't know the
drop the connection and start to accept new connection.



-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of David Gibbs
Sent: Wednesday, January 18, 2006 11:29 AM
To: RPG programming on the AS400 / iSeries

What do you mean 'clear the port'?

Sounds like some intermediary system is interfering with normal
operation.

If your server is using select() or blocking on read() when the client
dies, it should get back a negative return code indicating that there
was an error with the connection.  If it's not, then it sounds to me
like something is maintaining the connection artificially.

Keep in mind, just about everything about sockets I know, I learned from
Scott. :)