[ECOS] Re: Recent RedBoot/BOOTP change

[Jonathan Larmour]

Gary Thomas wrote:
> 
> Well, the DHCP server on RedHat 8.0+ definitely doesn't like it.
> It treats it as an invalid lease request, not a BOOTP request at
> all, and drops it without any response.  At least the old value
> was working - and no one complained for years.

I've just noticed that CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY is default 
enabled. This option is almost certainly only needed when you are actually 
using a gateway for DHCP. We've gotten away with this before simply 
because the option has indeed been wrong and been ignored, although I'm 
not sure how DHCP-via-gateway can ever have worked.

I wonder if the DHCP server is happier if a gateway is specified with a 
real gateway IP address.

But I think the better fix is probably to add a 
CYGSEM_REDBOOT_NETWORKING_GATEWAY_DHCP option because just because a 
gateway is needed in general doesn't necessarily mean it's required for 
DHCP. Then add that option as default disabled under 
CYGSEM_REDBOOT_NETWORKING_USE_GATEWAY and change bootp.c to use that instead.

Jifl
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