RE: [lwip-users] Listen on more then one port with lwIP

[Muhamad Ikhwan Ismail]

Hi,

It seems to me you might have a concurrent access problem on your sys_arch layer since
when you had the 2 listener socket in a single task, it worked. Try something like this,

-Block both thread
-start one of them, and wait till the netconn_accept is done
-start the 2nd thread after that

If it works then my assumption could be right. The only thing the 2 socket shares in netconn_accept is the
mailbox of the tcpip tasks and the same function call on sys_arch layers.

If that the case you might wanna do preemption protection to critical codes in the sys_arch layer?

> Date: Fri, 2 Jan 2009 10:55:06 +0100
> From: address@hidden
> To: address@hidden
> Subject: Re: [lwip-users] Listen on more then one port with lwIP
>
> as you top post I do so to so the source is preserved below.
>
> lwIP version is 1.3
> Microchip GCC C32 MIPS compiler
> FreeRTOS 5.1.0
>
> By not working I mean none of the listner threads return after
> netconn_accept which they do if I only have one thread.
>
> I pretty much expected this to be a usage fault and that the way I use
> dthe code was invalid.
>
> Cheers
> /Ake
>
> On Fri, Jan 2, 2009 at 10:31 AM, Muhamad Ikhwan Ismail
> <address@hidden> wrote:
> >
> > Hi,
> >
> > It would help the developer answer your question, if you explain what do you
> > mean by it does not work
> > e.g. where it blocks, you are getting no data or something like that. You
> > should also search the mailing list
> > for previous posts, someone might have asked the same q.
> >
> > You might want to info them also of your port and version.
> >
> > Greetings
> > Ikhwan
> >
> >
> >> Date: Thu, 1 Jan 2009 23:00:54 +0100
> >> From: address@hidden
> >> To: address@hidden
> >> Subject: [lwip-users] Listen on more then one port with lwIP
> >>
> >> I am new to lwIP and use it with FreeRTOS on a PIC32 so be patient
> >> with me if this is just a silly question.
> >>
> >> I want to have a web server plus a custom interface on the firmware I
> >> work on at the moment. So I try to solve this starting a new thread
> >> where I initialised lwip and then start two listner threads for the
> >> two ports.
> >>
> >> This does not work however even if they each work perfect on there own.
> >>
> >> How should this be coded correctly? Any hints appreciated.
> >>
> >> My listner thread look like this
> >>
> >>
> >> ///////////////////////////////////////////////////////////////////////////////
> >> // taskVSCPListner
> >> //
> >>
> >> void taskVSCPListner( void *pvParameters )
> >> {
> >> struct netconn *pxVSCPListener; // Listens for VSCP connections
> >> struct netconn *pxNewConnection;
> >>
> >> // Create a new tcp connection handle for VSCP
> >> pxVSCPListener = netconn_new( NETCONN_TCP );
> >> netconn_bind( pxVSCPListener, NULL, VSCP_LEVEL2_TCP_PORT );
> >> netconn_listen( pxVSCPListener );
> >>
> >> // Loop forever
> >> for( ;; ) {
> >>
> >> // Wait for connection.
> >> pxNewConnection = netconn_accept( pxVSCPListener );
> >>
> >> if ( pxNewConnection != NULL ) {
> >>
> >> // Service connection.
> >> vProcessVSCPConnection( pxNewConnection );
> >>
> >> while( netconn_delete( pxNewConnection ) != ERR_OK ) {
> >> vTaskDelay( webSHORT_DELAY );
> >> }
> >>
> >> }
> >>
> >> }
> >> }
> >>
> >>
> >>
> >> ///////////////////////////////////////////////////////////////////////////////
> >> // taskHTTPListner
> >> //
> >>
> >> void taskHTTPListner( void *pvParameters )
> >> {
> >> struct netconn *pxHTTPListener; // Listens for HTTP connections
> >> struct netconn *pxNewConnection;
> >>
> >> // Create a new tcp connection handle for HTTP
> >> pxHTTPListener = netconn_new( NETCONN_TCP );
> >> netconn_bind( pxHTTPListener, NULL, webHTTP_PORT );
> >> netconn_listen( pxHTTPListener );
> >>
> >> // Create a new tcp connection handle for VSCP
> >> //pxVSCPListener = netconn_new( NETCONN_TCP );
> >> //netconn_bind( pxHTTPListener, NULL, VSCP_LEVEL2_TCP_PORT );
> >> //netconn_listen( pxVSCPListener );
> >>
> >> // Loop forever
> >> for( ;; ) {
> >>
> >> // Wait for connection.
> >> pxNewConnection = netconn_accept( pxHTTPListener );
> >>
> >> if ( pxNewConnection != NULL ) {
> >>
> >> // Service connection.
> >> vProcessConnection( pxNewConnection );
> >>
> >> while( netconn_delete( pxNewConnection ) != ERR_OK ) {
> >> vTaskDelay( webSHORT_DELAY );
> >> }
> >>
> >> }
> >>
> >> }
> >> }
> >>
> >> Cheers
> >> /Ake
> >>
> >>
> >> --
> >> ---
> >> Ake Hedman
> >> D of Scandinavia, http://www.dofscandinavia.com
> >>
> >>
> >> _______________________________________________
> >> lwip-users mailing list
> >> address@hidden
> >> http://lists.nongnu.org/mailman/listinfo/lwip-users
> >
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> >
>
>
>
> --
> ---
> Ake Hedman
> D of Scandinavia, http://www.dofscandinavia.com
>
>
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> address@hidden
> http://lists.nongnu.org/mailman/listinfo/lwip-users

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