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Re: [lwip-users] Reassemble fragmented TCP packets
From: |
Baptiste Chaboud-crousaz |
Subject: |
Re: [lwip-users] Reassemble fragmented TCP packets |
Date: |
Thu, 27 Aug 2009 15:33:51 +0200 |
User-agent: |
Internet Messaging Program (IMP) H3 (4.1.6) |
Hi,
Thanks you very much for that clarifications. It is really helpful
to understand where I should do something to fix my problem: the HTTP
server.
Is there a way, by using another API than RAW API, to have TCP
behaves as I expect? If yes which API should I
use?
Regards.
Baptiste Chaboud-Crousaz
Quoting Mike Kleshov <address@hidden>:
> 2009/8/27 Baptiste Chaboud-crousaz
<address@hidden>:
>> Nevertheless, lwip is not able to reassemble the both frames. As a
result,
>> my HTTP server receive it separetely: first frame = the header;
second
>> frame=the data. That 's not what it was expected!!!! I want lwip
reassemble
>> the both TCP segments before providing it the HTTP server.
>
> That's not how lwip is designed to work. If you are using the raw API,
> lwip passes data to your application in chunks, as they arrive. Your
> application is responsible for interpreting the data, however small or
> large the chunks may be.
> In fact, the simple HTTP server in contrib is cheating here: it
> expects the HTTP request to be contained in a single pbuf, which is
> true most of the time. However, it is perfectly legal to send an HTTP
> request in many small packets (with 1-byte payload each, in an extreme
> case) and the simple HTTP server provided will fail to process such
> request correctly. You can realize such scenario using a telnet client
> to send an HTTP request: the telnet client sends data 1 byte at a time
> as you type it.
>
> Regards,
> - mike
>
>
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> lwip-users mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/lwip-users
>
- [lwip-users] Reassemble fragmented TCP packets, Baptiste Chaboud-crousaz, 2009/08/26
- [lwip-users] Reassemble fragmented TCP packets, Baptiste Chaboud-crousaz, 2009/08/26
- Re: [lwip-users] Reassemble fragmented TCP packets, Fabian Koch, 2009/08/27
- Re: [lwip-users] Reassemble fragmented TCP packets, Baptiste Chaboud-crousaz, 2009/08/27
- Re: [lwip-users] Reassemble fragmented TCP packets, Mike Kleshov, 2009/08/27
- Re: [lwip-users] Reassemble fragmented TCP packets,
Baptiste Chaboud-crousaz <=
- Re: [lwip-users] Reassemble fragmented TCP packets, Alain Mouette, 2009/08/27
- Re: [lwip-users] Reassemble fragmented TCP packets, Baptiste Chaboud-crousaz, 2009/08/31
- Re: [lwip-users] Reassemble fragmented TCP packets, address@hidden, 2009/08/31