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

[YAP]

On Fri, Jan 2, 2009 at 4:30 PM, YAP <address@hidden> wrote:
> OK Thanks I will try that.
>
> I noticed that netcon_new returns zero if both threads are started so
> the problem really appears to be there. Looks like a memory problem.
>
> /Ake


OK I found the problem. MEMP_NUM_NETBUF  and MEMP_NUM_NETCONN was set
to low (2) and increasing the values (4) made things work. I was not
aware that the listen also counted as a connection but is quite
understandable now when I discovered the problem.

Cheers
/Ake

>
>
> On Fri, Jan 2, 2009 at 11:06 AM, Muhamad Ikhwan Ismail
> <address@hidden> wrote:
>>
>> 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
>>> >>
>>> >>
>>> >> _______________________________________________
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>>> >> 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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>
>
>
> --
>  ---
> Ake Hedman
> D of Scandinavia, http://www.dofscandinavia.com
>



-- 
 ---
Ake Hedman
D of Scandinavia, http://www.dofscandinavia.com