RE: -- MIDRANGE-L


This simply isn't true.   You can accept more than one connection without
closing the socket in between.  I do it every day.

The pseudocode should look something like this:

     1) call socket() to get a new descriptor
     2) Call bind() to bind to a port
     3) call listen() to tell the system you want to accept connections
     4) call accept() to get a new connection from a client
     5) do something with the client
     6) close the client's descriptor (the one returned by accept())
     7) go back to step 4.


On Mon, 23 Jul 2001, Chris Bipes wrote:

> In your RPG you are only allowing one Socked Descriptor.  You must close the
> SD between accepts.  If you program already has one connection, it will
> refuse the second.  If you accept one connection and not close it properly,
> you will have a lingering SD that you can not reuse.  I found it best to
> delete the SD after closing then creating a new one to use.  It also looks
> like you change SD upon accepting the connection, can the client do that?  I
> don't know the C stuff to be sure?
> 
> Christopher K. Bipes  mailto:ChrisB@Cross-Check.com
> Operation & Network Mgr       mailto:Chris_Bipes@Yahoo.com
> CrossCheck, Inc.      http://www.cross-check.com
> 6119 State Farm Drive Phone: 707 586-0551 x 1102
> Rohnert Park CA  94928        Fax: 707 586-1884
> 
> 
> 
> -----Original Message-----
> From: srichter [mailto:srichter@mail.autocoder.com]
> Sent: Monday, July 23, 2001 5:02 PM
> To: midrange-l@midrange.com
> Subject: 
> 
> 
> 
> Hello all,
> 
> I am attempting to socket from a win95 pc to an as400. Both systems are on
> the same local ethernet lan. Both behind the firewall.
> When I run connect( ) on the pc, a "WSAECONNREFUSED" ( the attempt to
> connect was forcefully rejected ) error code is returned.
> 
> My "Listen" pgm is running on the as400.  It was able to rcv data on a
> loopback test, so I am reasonably sure it is coded correctly.
> ** Create the socket.                                                
>  C                   Eval      SD = Socket (AF_INET: SOCK_STREAM: 0 )
> ** Bind - set local address for the socket.
>  C                   Eval      SocketAddr = *ALLX'00'
>  C                   Eval      SinFamily  = AF_INET
>  C                   Eval      SinPort    = 3005
>  C                   Eval      SinAddr    = INADDR_ANY
>  C                   Eval      rc = Bind (SD: %ADDR(SocketAddr)
>  C                                          : %SIZE(SocketAddr))
> ** Listen - Invite incoming connections.
>  C                   Eval      rc = Listen (SD: 1)<<<<<<<<< only 1 allowed
>  ** Accept - Wait for connection request and Make connection.
>  **   Accept incoming connection request from the client.
>  **   A new socket (SD2) is created for the client.
>  c                   Eval      SD2 = Accept( SD:
>  c                                           %Addr(AccpAddr):
>  c                                           %Addr(AccpAddrLgth) )
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