Re: [lwip-users] Detail usage of ppp (address@hidden)

[narke]

On 22 August 2011 03:52, Hans-Jörg Wagner <address@hidden> wrote:
>  Hi
>
> I recommend you to browse through the old mailings within this mailing list.
> Some of mine date back to 2007. The keywords you have to use for your search
> are ppp, nosys (perhaps no_sys) and/or address@hidden There where at least
> two mailings considering ppp with no_sys.
>
> br
> HJ
>
> On 08/19/2011 06:00 PM, address@hidden wrote:
>
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> Today's Topics:
>
>    1. Re: lwip 1.4 - no FIN sent! (Stephane Lesage)
>    2. Re: lwip 1.4 - no FIN sent! (MB)
>    3. Detail usage of ppp (narke)
>    4. Re: lwip 1.4 - no FIN sent! (Stephane Lesage)
>    5. Re: lwip 1.4 - no FIN sent! (Stephane Lesage)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 18 Aug 2011 18:31:18 +0200
> From: "Stephane Lesage" <address@hidden>
> To: "Mailing list for lwIP users" <address@hidden>
> Subject: Re: [lwip-users] lwip 1.4 - no FIN sent!
> Message-ID: <address@hidden>
> Content-Type: text/plain; charset="us-ascii"
>
>
>
> I suggest someone with TCP knowledge (simon, Kieran ?) takes a look
>
>
> at
>
>
> this issue.
>
>
> I'd be happy to, but I'll be away for a week or two on holiday.  If
>
>
> you
>
>
> can get a simple test case that shows the problem, and a packet
>
>
> capture
>
>
> to illustrate it, that would be extremely helpful.
>
>
> False alert for the FIN !
> The flag is set but it's not displayed in wireshark single line because
> it's interpreted as an HTTP response.
>
> m8847 you should check in the packet details.
>
> I still have my last data packet not sent immediately after a close...
>
> I may have the same problem as Richard Barry in "Delayed ACK causing
> problems? Where to calltcp_nagle_disable()? "
>
> As said by Felipe de Andrade:
> "how came the Nagle's algorithm has caused the problem, as it is suppose
> to group small data until receive the next ack, but the JPG has lots of
> pending data to be sent and the algorithm shouldn't retain it."
>
> When closing, tcp should also sent the pending data immediately, no ?
> And I also noticed the window advertised by lwIP is weird.
>
> In the attached capture we can see:
> 2. LwIP (192.168.10.151) accepts connection and advertise a 8192 bytes
> window
> 4. browser (192.168.10.252) sends 338 bytes
> 5. LwIP acknowledges 338 bytes, sends 79 bytes, and advertises a 7854
> bytes window
> 6. LwIP 338 bytes, sends 1460 bytes, and still advertises a 7854 bytes
> window
>
> At this moment, the browser request has already been read. So shouldn't
> lwIP advertise 8192 again ?
>
> 10. last data sent by lwIP with FIN flag
>
> Why wait the ACK in packet 9 to send the data ?
>
>
>
> --
> ________________________________
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>

HI, Hans

Thanks for you recommends.  But even after I searched the user list, I
still not found an answer.  My question is just simple:

1. What's the public interface (the real public function list) of PPP module
2. What's the generate/sample calling sequence of using PPP.

Hope I am not disturbing the list.

-- 
Life is the only flaw in an otherwise perfect nonexistence
    -- Schopenhauer

narke
public key at http://subkeys.pgp.net:11371 (address@hidden)