can you send us a patch that works for you?
we can make it #ifdef __Alpha__ or something.
can you ocnfirm that the outgoing packet has a tag-lenth of '8'
and that teh return tag has a length of '4'?
(maybe 9 and 5)
sounds like a brain-dead router at the other end..
On Wed, 1 Aug 2001, Thomas Pornin wrote:
> Hello,
>
> I recently connected my FreeBSD/Alpha (4.3-RELEASE) to an ADSL link
> using an Alcatel Speed Touch Home modem. As is, it was not working;
> after some digging, I found that there is a bug either in the ng_pppoe
> support, or in the modem.
>
> The problem is in the pppoe_finduniq() function. In order to identify
> sessions, the PPPoE code sends a tag with the first packet it sends to
> the modem; this tag is in fact a 64-bit pointer to some data structure
> in kernel space. When a packet of type PADO_CODE or PADS_CODE is
> received, the tag is compared with known pointers.
>
> However, only 32 bits are present in the return tag. So, if the original
> pointer is 0xfffffc00003b3d00, the tag contains only 0x003b3d00, which
> are the first four bytes of data (in little-endian representation). If
> I modify the pppoe_finduniq() function to accept matches on these four
> bytes, the connection is established, and remains fully functionnal
> afterwards.
>
> Some details: The Alpha is little-endian, but the data in the packets is
> big-endian. If the original pointer is 0xfffffc00003b3d00, the rebuilt
> tag from the response packet is actually 0x003b3d0000000000. I do not
> know if the 8-bytes tag is sent correctly, or if the modem is buggy, or
> whatever.
>
> Machine configuration:
> AXPpci33 at 166 MHz, 32 MB ram
> ethernet PCI adapter RealTek 8029 10baseT (ed0)
> modem Alcatel Speed Touch Home (ethernet)
> FreeBSD 4.3-RELEASE (with a small patch to enable ed0)
>
> Feel free to ask for any detail.
>
>
> --Thomas Pornin
>
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