MASQUERADE + DHCP problem

[Patrick McHardy]

Rusty Russell wrote:
> On Sun, 2005-09-11 at 17:07 +0200, Patrick McHardy wrote:
> 
>>2) Add a special hack to masquerade to handle DHCP while no
>>   local address exists by looking at the port and src/dst
>>   address. Incredibly ugly and wrong :)
> 
> 
> If IP src is 0.0.0.0, let it through untouched.  Those packets are
> presumably not supposed to be masqueraded, so it's the Right Think
> AFAICT.
> 
> Will that fix DHCP?

Absolutely. Since these packets never get routed, the only possibility
when they can occur is when a local raw socket with IP_HDRINCL chooses
a source address of 0. In that case it definitely seems right to leave
the packet alone.

Thanks!

Patrick