[Dnsmasq-discuss] dnsmasq sending advertise packets for the packet containing server id

[Simon Kelley]

On 24/04/2023 05:41, shashikumar Shashi wrote:
> Hi,
> 
> I am using dnsmasq-2.80, IN this I am observing dnsmasq sending the 
> advertising packets for the packet containing the Server id.
> This is a violation of the RFC - 
> https://www.rfc-editor.org/rfc/rfc3315#section-15.2 
> <https://www.rfc-editor.org/rfc/rfc3315#section-15.2>
> 
> Below is my packet:
> 0x0000: 3333 0001 0002 0050 5696 5000 86dd 6000
> 0x0010: 0000 003a 11ff fe80 0000 0000 0000 0250
> 0x0020: 56ff fe96 5000 ff02 0000 0000 0000 0000
> 0x0030: 0000 0001 0002 0222 0223 003a ac9b 01ac
> 0x0040: 1a04 0002 0012 554e 5553 4544 2d53 4552
> 0x0050: 5645 522d 4455 4944 0001 0004 3e74 dd1b
> 0x0060: 0003 000c 6848 70e4 0000 0000 0000 0000
> 
> 
> Is there any known issue??
> 


Thanks for the report. I've just pushed a code change which improves the 
checking of received packets to conform better with section 15.

https://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=7500157cff8ea28ab03e6e62e0d1575e4d01746b

Out of interest, did this cause problems in a real installation, or were 
you running a test suite?


Cheers,

Simon.