Re: about a usb adsl modem driver

From: Andre Oppermann (andre_at_freebsd.org)
Date: 12/03/04

  • Next message: Max Laier: "Re: ALTQ integration and FreeBSD 4.x" 
    Date: Fri, 03 Dec 2004 20:58:33 +0100
To: Jose M Rodriguez <josemi@freebsd.jazztel.es>

    Jose M Rodriguez wrote:
    > El Viernes, 3 de Diciembre de 2004 17:50, Roman Kurakin escribió:
    >
    >>Jose M Rodriguez wrote:
    >>
    >>>Hi,
    >>>
    >>>I've got a eagle usb adsl modem and get ready to work on FreeBSD
    >>>support for it.
    >>>[...]
    >>>
    >>>My first idea was a sppp based one, that can be ported to all xBSD.
    >>>But now I think that a netgraph thing must be a better first
    >>>contact.
    >>
    >>Note, with Netgraph you may use sppp via ng_sppp(4). Also it is not
    >>to hard to
    >>implement a dual driver. But I sugest to not do that way, especialy
    >>if you want to
    >>support multiple branches. I know how hard is that ;-).
    >>(http://www.cronyx.ru/software/sigma.html)
    >>If your implementation would work with sppp (via ng_sppp(4)) or you
    >>would need
    >>smth additional from sppp(4) let me know.
    >>
    >>rik
    >>
    >
    > Well, this may depend of noted interest.
    >
    > I can work on RELENG_5_3 or RELENG_4, but I need some commiter that can
    > take this into HEAD.
    >
    > I found Netgraph the easy path. A, let's say, ng_uadsl limited only to
    > move aal5 between the modem and netgraph may be enough to use routed
    > protocols, bridged mode, pppoe, pppoa, pptp, user-ppp, sppp, ... just
    > with some equivalents of frame relay nodes and atm_llc, adapted to
    > rfc2684.

    There is an extensive Netgraph ATM framework in FreeBSD 5.x written
    by harti@freebsd.org. The only thing you need to do is the hardware
    driver for the ADSL USB modem. 

    -- 
Andre
> The hard part of this solution is that we need more userland work to 
> sync all this stuff.
> 
> Also, I noted that most of home adsl connections are of just only three 
> categories:
> 
> - IPv4 routed (generally LLC)
> - pppoe over ethernet bridge (Only LLC)
> - pppoa (generally VCMux, but also LLC)
> 
> I think this can be taken by a sppp derived work.
> 
> pppoa may be really direct (just PDU test/adjust), but the other need 
> more work.
> 
> IPv4 routed needs some kinda of bypass control, to use only the basic if 
> interface after sppp.
> 
> pppoe (only client) may be implemented in a single step with ethernet 
> bridge encapsulation as a dial extension.
> 
> Also, an auto mode for pppoe/pppoa-LLC/pppoa-VCMux may be implemented 
> without too much problem (rotatory mode selection in sucesive dial 
> attemps).
> 
> Support form OpenBSD must be easy, but NetBSD is another story.  This 
> implementation is heavily affected by pppoe works and really differ 
> from FreeBSD/OpenBSD.
> 
> Also, the usb part needs works.
> 
> A eagle implementation based on ueagle must be easy. but this driver is, 
> right now, too much 'eagle oriented'.
> 
> I'll prefer a 'ugen derived' model (used by net/pppoa). Or, at last, a 
> more generic driver.
> 
> This needs really 'too much manpower' that I can expend now.
> 
> So, if noboby else have any more to say, I'll work it only two basic 
> directions, time permitting:
> 
> - a sppp based, pppoa only driver for eagle, derived from ueagle, for 
> RELENG_5.
> 
> - a ng_ueagle node for RELENG_5 derived from ueagle.
> 
> thanks for your time,
> --
>   josemi
> 
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