Re: TCP Sockets on V4R5: bind() woes

Patrik,

The problem appears to be on this line:


     memset(&thisSockData, 0, thisSockSize);


Since you haven't yet set "thisSockSize" at this point, it will write 
zeroes into an unpredictable amount of memory, and cause strange 
problems.   I downloaded your code and corrected that line, and it 
worked okay for me.

-SK


On 7/1/22 5:12 PM, Patrik Schindler wrote:
> Hello,
>
> after being busy with other things for quite some time, I'm coming back to getting along with socket programming in C on OS/400. Quite old, though: V4R5. This intentionally.
>
> Half a year ago, I finished a UDP socket based "daemon" which works just great.
>
> https://github.com/PoC-dev/asterisk-translate-clid
>
>
> But I struggle with getting a simple TCP server to run based on that code. It compiles fine, but emits a
>
> bind(): failed: The value specified for the argument is not correct.
>
> on the bind() call at line 166.
>
> Server code: https://leela.pocnet.net/~poc/txrepd.c
>
> If you want to compile and test-run yourself, you need to add an entry to the TCP services table: GO CFGTCP => 21 => 1. The entry is expected to be "sa-txrep", as to be seen in line 151 of the code.
>
>
> When I compare the code steps with the TCP Server example code from Chris Hird, I can't see any obvious error.
>
> https://github.com/ChrisHird/OSTOOLS/blob/master/QCSRC/TESTSVR.C
>
>
> Any hints well appreciated! Thanks!!
>
> :wq! PoC
>
-- 
Scott Klement
http://www.scottklement.com

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