udhcpc: throttled down data transmission

[Alexander Wilhelm]

Am Thu, Feb 15, 2024 at 12:23:06PM +0000 schrieb Laurent Bercot:
> > I'm using 'udhcpc' on my ARM64 platform with the following scenario: I have one
> > 'eth0' interface that has a static ip address and the 'udhcpc' client on the
> > same interface. That leads to low data transmission performace on that
> > interface.
> 
>  Most people use udhcpc when they *don't* have a static IP address on
> an interface, the point of DHCP being to assign an IP address. In that
> common use case, it is impossible to use UDP, since IPv4 is not
> configured yet! Listening on a raw socket is the only option.
> 
>  Your use case is pretty niche, already having IPv4 configured on your
> interface before you use udhcpc. It's not surprising that udhcpc isn't
> optimized for it: it's a small client after all.
> 
>  I suppose it could be patched to add an option to use UDP when the
> interface already has an address, but it would mean effort, and more code
> in busybox, which is probably not worth the trade-off.
> 
> --
>  Laurent
> 

Thank you for the clear explanation. I'm going to disable the 'udhcpc' client
when the interface 'eth0' has already an static IP address.


Best regards
Alexander Wilhelm