Re: Socket Help -- RPG400-L

This is probably a problem on your client side.

Also, are you sure you are transmitting a complete packet?  And that your
RPG is not waiting for a full packet before it transmits?

The way sockets work on the PC side (from what I have coded before) is
when you do a READ one of two things will happen depending on how the
socket is coded on the PC.

1. The program will go to read the socket and wait until it reseives a packet.
The program will do nothing else until it receives a packet and then it will 
continue
operation (sounds like what is happening to you).

2. The program will go to read the socket and return a status code stating
if data was read or not.  Or, it will return the number of bytes read as 0.

The way I have tested PC sockets before is I create a little edit window on the 
PC
and right after I do a READ I copy the buffer to the edit window to the end.  
Very simple
trace logic that takes very few lines of code (create the edit window, copy 
read buffer
to edit window).

By the fact that you state that your client just seems to freeze, I am assuming 
that your
client is waiting for data.  That your read will not return until it receives a 
packet.  Also,
is it possible you are trying to read twice, but only sending one packet? In 
which case it
would lock up.

Try changing the way you  are coding the read so that the client will return 
immediately
even if no data is available.

Regards,

Jim Langston

"Hatzenbeler, Tim" wrote:

> This is my first attempt at writing a socket server, and it works sorta...
> Nearly all of the code was taken from the 'I didn't know I could do that
> book :) '
>
> Version 3 code (Multiple clients, 1 server) the server would write the
> requests to a prtf, and an audit log to a prtf.  But I'm trying to pass the
> results back to the client.
>
> So I added what I thought would be the correct code to the server (WRITE)
> and to the client a (READ) command, but the client just seems to freeze.
>
> The server is working fine, because If I open another client and use the
> ENDSV command the server completes normally.  So either the write is not
> writing anything, or the read is looking at the wrong spot or something...
>
> So I was wondering if any one had any suggestions, or even a way on the 400
> to monitor that port to see if any data is present...
>
> tia, tim

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