Messages in this thread | | | Subject | Re: ppp compression modules ? | From | Henner Eisen <> | Date | 04 Oct 1999 23:39:12 +0200 |
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Hi,
>>>>> Homme R Bitter <homme@vuurwerk.nl> writes:
[:]
>Alas, for some reason there is stac for ISDNppp, but not for async ppp, >the predictor module isn't written either, the cisco doesn't support >ppp-deflate or bsd compression. >The modems have LAPM5, which is sometimes an improvement, but it's not the >same as stac. > >Does anyone know who is working on this? >Are there any alpha/beta things to be tested yet?
As far as I understand comments in the isdn_ppp.c kernel source, for the some compression methods the comopression control protocol interacts with the compressor/decompressor in a non-trival manner which is not covert by the current compression API. isdn_ppp.c contains some special hooks to partially handle CCP inside the kernel to resolve this. This might be the reason why not all compressors can be used with the async ppp driver.
>Are there plans to implement just one ppp that works with both ISDN and >async?
2.3.x now has a generic ppp layer that can be used by any framing device. Howevr, this is fairly new and ISDN does not use it. It might be possible and I agree with you that this is The Right Thing (TM), but this is certainly a task not to be started before 2.4.x is out.
Henner
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