Re: Good intentions that never get followed through...

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From: Rob Scovell-Lightfoot
Subject: Re: Good intentions that never get followed through...
Date: 03:27 on 27 Mar 2006
Yes, thought so ...

Tech Name:Mike Beattie
Tech Street2:-
Tech Street3:
Tech City:Dunedin
Tech State/Province:Otago
Tech Postal Code:9001
Tech Country:NZ

On 27/03/2006, at 2:10 PM, Mike Beattie wrote:

> Right, so I've dutifully been quagmired in 
> http://we.hates-software.com/ for
> the last few days (Was introduced sometime last year, and forced 
> myself then
> to ignore it till I had the time to read.. :P).. And I feel empowered
> enough to share with you lovely bitter folk, a Hate of mine that 
> reared its
> pustule infected head on Friday.
>
> So, I live in a part of the world that has a severely Intellectually
> Handicapped Broadband service. No points for guessing where. Anyway, 
> I've
> got this 2mbit/128kbit connection at home, that's basically grown from 
> a
> 24/7 56k modem link some years ago. Some years ago, the 486 firewall 
> with
> ISA 10mbit NIC's was un-hateful. Now, on the otherhand, I get about
> 85-90kbytes/sec through this box. Ok, so perhaps I should replace it 
> with
> something a little more grunty, that can get me the full potential of 
> that
> 2mbit.
>
> Enter one disused "development" Linksys WRT54G. Update the firmware to 
> the
> latest OpenWRT (RC4, as of Friday, RC5 was released today... *seethe*).
> "Development", because I'd hacked it to add an SD card slot.. no 
> matter, the
> firewall could probably do with a little storage for logs and whatnot.
>
> Anyway, I have this slightly tempermental, but definitely better than 
> the
> alternatives, 3com HomeConnect ADSL Modem. 3com, in their infinite 
> wisdom,
> decided to change the Ethernet frame types for its implementation of 
> PPPoE.
> This is a whole other Hate that I just won't go into now. (PPPoE on 
> the LAN
> side, it's an Access Concentrator.. it basically converts the PPPoA 
> ADSL we
> have here to PPPoE on my side.. just a bridge, doesn't do any login or
> anything).  Oh... and the modified frame type values?  0x3c12 and 
> 0x3c13.
> Now, I can't imagine why they chose those....
>
> On with the story, less rambling... Ok, so the linux kernel mode pppoe
> driver, and the pppd plugin to use kernel mode pppoe, don't support 
> these
> different frame types. Hackery time. Fetch the OpenWRT dev environment 
> from
> Subversion. Type 'make'. Wait. Wait some more. and some more... ok, 
> done.
> (download sources for kernel, gcc, etc, etc, build crosscompile
> environment). Find locations to change frame types, to see if it'll 
> work.
> Kernel tree - include/linux/if_ether.h. easy. pppd. Hrm.. ok, plugins..
> ahh.. pppd/plugins/rp-pppoe/pppoe.h:
>
>    /* Ethernet frame types according to RFC 2516 */
>    #define ETH_PPPOE_DISCOVERY 0x8863
>    #define ETH_PPPOE_SESSION   0x8864
>
>    /* But some brain-dead peers disobey the RFC, so frame types are 
> variables */
>    extern UINT16_t Eth_PPPOE_Discovery;
>    extern UINT16_t Eth_PPPOE_Session;
>
> Oh, brilliant! there must be some config options to do this.. that 
> makes it
> easy!
>
> Hunt around... Ok, those variables are only given values in one place, 
> in if.c:
>
>    /* Initialize frame types to RFC 2516 values.  Some broken peers 
> apparently
>       use different frame types... sigh... */
>
>    UINT16_t Eth_PPPOE_Discovery = ETH_PPPOE_DISCOVERY;
>    UINT16_t Eth_PPPOE_Session   = ETH_PPPOE_SESSION;
>
> HATE. HATE, and some more HATE. Ok, I can see the intention is there to
> perhaps actually do something useful with those values in variables... 
> but
> honestly, whinging about some "broken" and "brain-dead" peers not 
> using the
> right frame type values, then half-heartedly having a go at supporting 
> them?
> Would have been better to just define the bloody values, and not say
> anything.. *Argh*.
>
>
> Now, this probably isn't the best hate I could muster.. but supposedly 
> I
> need to be doing this thing called work.. Thankfully I finished battle 
> with
> the SCO box last week... there's some Hate there, but it's worn off a 
> little
> now.
>
> Mike.
> -- 
> Mike Beattie <mike@xxxxxxxx.xxx>

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