[ipxe-devel] DHCPv6 problem

Anton D. Kachalov mouse at yandex-team.ru
Thu May 22 09:11:39 BST 2014


I have printouted contents of "local" variable and each "udp" item in udp_demux() (see attached screenshot). The "pad" bytes are scrambled in received buffer while items' pads has all zeroes.

May be a problem in union:

   https://github.com/ipxe/ipxe/blob/master/src/net/ipv6.c#L600

while filling sockaddr_in6 structure's "sin6.sin6_addr" field that is somewhere in "pad" field of sockaddr_tcpip structure:

   https://github.com/ipxe/ipxe/blob/master/src/net/ipv6.c#L732

For the ipv4's dhcp requests all pads are zeroes.

21.05.2014, 21:09, "Anton D. Kachalov" <mouse at yandex-team.ru>:
> It's a current branch. I've just add an additional DBG out in udp_demux().
>
> 21.05.2014, 21:06, "Michael Brown" <mcb30 at ipxe.org>:
>> On 21/05/14 17:57, Anton D. Kachalov wrote:
>>>  I've tried to run dhcpv6 setup and have experienced a problem with
>>>  dhcpv6. In end of December'13 everything was fine.
>>>
>>>  In stateless mode ipxe has been successfully configured (sets the rdnss
>>>  and dnssl config).
>>>  But in statefull mode I've got an error: "No UDP connection listening on
>>>  port 546" (udp_demux() returns NULL).
>>
>> It works for me.  I note from the screenshot that you have some local
>> code modifications.  Are you able to reproduce the error with the
>> current master branch of iPXE?
>>
>> Michael
>
> ,
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-- 
Anton D. Kachalov

ITO, System Architect
Tel: 7 (495) 739-70-00 ext.7613
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