[lwip-users] Html pages issue

[wilson gomes]

  Dear All,

I am using Florian's port of LwIP for Win32( MS VC)in Windows2000 OS 
environment. To explore more on this stack, we want to display our own html 
pages  instead of the default lwip Web pages.Could anyone give me some pointers 
on how to do this?


Best Regards,
Wilson Gomes


On Wed, 16 Jun 2004 address@hidden wrote :
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>Today's Topics:
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>    1. Re: Problems with ASSERTION in tcp_in and tcp_out (Justin Bayles)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Wed, 16 Jun 2004 14:24:03 +1000
> From: "Justin Bayles" <address@hidden>
>Subject: Re: [lwip-users] Problems with ASSERTION in tcp_in and
>       tcp_out
>To: address@hidden
>Message-ID: <address@hidden>
>Content-Type: text/plain; format=flowed
>
>Hello Leon,
>
> >interesting. Let me ask a few questions before making false assumptions.
> >you describe your application as having a read and write process. Do
> >they share one instance of lwIP or do they each have an instance of lwIP?
>
>Each process has its own instance of lwIP.
>
> > > I have narrowed in on the source of my problems.
> > >
> > > When processes send tcp packets and receive ACKs at the same time, the
> > >
> >What exactly do you mean by "at the same time"? Do you mean the SLIP
> >receive thread can be pre-empted by the TCP thread and vice versa.?
>
>I mean that it is possible for tcp_in to be removing PCBs from the unacked
>queue while tcp_enqueue is putting them in. This may not be the problem
>though because I tried wrapping access to the unacked and unsent queues in a
>semaphore and still get the assertion.
>
>All threads are fully preemptable.
>
> > > pcb->snd_queuelen is being corrupted. tcp_out is busy adding PCBs to the
> > > send queue in tcp_enqueue() while tcp_in is pulling them out in
> > > tcp_receive(). It all depends on who changes the pcb->snd_queuelen first
> > > as to whether the process crashes in tcp_in or tcp_out.
> > >
> >Are you directly calling the tcp_*() functions?
>
>No, I am not directly calling the tcp_*() functions.
>
> >
> > > Is this a problem that other people have experienced? Am I doing
> > > something
> > > wrong with my implementation.
> > >
> >Well, at least we should find out what is wrong. In the best case, we
> >need to document lwIP better.
> >
> >Regards,
> >
> >Leon.
>
>Would it be helpful if I sent you a copy of my sys_arch.c file? You might be
>able to spot an id10t error.
>Thanks for persisting with me,
>Justin
>
>
> >
> > > Thanks,
> > > Justin
> > >
> > > >From: "Justin Bayles" <address@hidden>
> > > >Reply-To: Mailing list for lwIP users <address@hidden>
> > > >To: address@hidden
> > > >Subject: Re: [lwip-users] Problems with ASSERTION in tcp_in and tcp_out
> > > >Date: Fri, 11 Jun 2004 10:59:33 +1000
> > > >
> > > >Hi Leon,
> > > >
> > > >I am using the 0.7.2 release to do a win32 port.
> > > >
> > > >I am using the slip interface with Named Pipes as the physical layer.
> >Each
> > > >netif connects to the Named Pipe Server. The Named Pipe Server is a
> > > >separate process that creates a thread to listen to each pipe. When a
> >full
> > > >slip packet arrives, the thread transmits the slip packet down every
> >pipe
> > > >except the pipe that the packet came from. The write is protected by a
> > > >semaphore so that pipes will only ever receive one slip packet at a
> >time.
> > > >This has no effect on the lwip stack. It emulates a shared transmission
> > > >medium.
> > > >
> > > >I have a read process that listens for incoming connection requests,
> > > >connects, receives data and prints it to stdout. The read process has
> >three
> > > >threads running: the tcpip thread, the slipif thread and the main
> >thread.
> > > >The tcpip thread is generated by lwip. The slipif thread reads bytes
> >from
> > > >the serial interface (pipe), and forwards complete slip packets to the
> >ip
> > > >layer. The main thread is an infinite loop on netconn_recv,
> >netbuf_data,
> > > >netbuf_delete etc.
> > > >
> > > >I have a write process that connects to the read process and sends
> >packets
> > > >every half a second using netconn_write. The write process also has
> >three
> > > >threads running: the tcpip thread, the slipif thread and the main
> >thread.
> > > >
> > > >Sometime I get up to 250 successful transmissions before the ASSERTION
> >in
> > > >tcp_out or tcp_in is called. I think I have a re-entrancy problem.
> > > >
> > > >Thanks,
> > > >Justin
> > > >
> > > >
> > > >
> > > >>From: Leon Woestenberg <address@hidden>
> > > >>Reply-To: Mailing list for lwIP users <address@hidden>
> > > >>To: Mailing list for lwIP users <address@hidden>
> > > >>Subject: Re: [lwip-users] Problems with ASSERTION in tcp_in and
> >tcp_out
> > > >>Date: Thu, 10 Jun 2004 18:54:00 +0200
> > > >>
> > > >>Hello Justin,
> > > >>
> > > >>
> > > >>Justin Bayles wrote:
> > > >>
> > > >>>I am having trouble with the following assertions:
> > > >>>
> > > >>>"Assertion "tcp_enqueue: valid queue length" failed at line 139 in
> > > >>>.\src\core\tcp
> > > >>>_out.c"
> > > >>>
> > > >>>"Assertion "tcp_receive: valid queue length" failed at line 801 in
> > > >>>.\src\core\tcp
> > > >>>_in.c"
> > > >>>
> > > >>>Could people please suggest some possible solutions to these errors?
> >I
> > > >>>have read previous posts from the archive on this topic however they
> >have
> > > >>>not helped.
> > > >>>
> > > >>Could you mention the version of lwIP you are using? As well as some
> > > >>details on your application.
> > > >>
> > > >>Regards,
> > > >>
> > > >>Leon.
> > > >>
> > > >>
> > > >>
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