Re: Bind the socket to an IP address

[Scott Klement <klemscot@xxxxxxxxxxxx>]

No, bind() should NOT be returning the IP address immediately.

Here's why:

    1) If you specified a specific IP when calling bind() you already know
          the IP.

    2) IF you did not specific a specific IP when calling bind(), the
          system doesn't know the IP until connect() or accept() has
          been issued.

Example:
   Your AS/400 has two ethernet cards, one to your accounting department's
   subnet which has IP address 192.168.1.1  and one to your IT dept's
   subnet which has IP address 192.168.2.1.    You write a program that
   binds to port 4444, but does not specific which IP address.  You 
   do a listen().   

   Someone from either the accounting dept or the IT dept can now connect
   to port 4444 on your AS/400.   Until that connection has been made,
   the AS/400 has no way to know which network card was used, and
   therefore cannot know the IP address.


Make sense?


On Thu, 14 Dec 2000 Contractor1@Parkdalemills.com wrote:

> I'm learning sockets from SServer in the 'Who Knew...RPG IV?'
> 
> In the program SServer, should I not see an IP value in SinAddr immediately
> after the bind process?
> 
> Patrick Conner
> www.ConnecTown.com
> (828) 244-0822

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