udhcpc: dont use BPF filter, users report problems (bugs 4598, 6746), commit e4785ca653d0e219926692c229673b2c1b8d6ac4

Cristian Ionescu-Idbohrn cristian.ionescu-idbohrn at axis.com
Tue Feb 4 19:57:17 UTC 2014

On Tue, 4 Feb 2014, Cristian Ionescu-Idbohrn wrote:
> The backside of this, IIRC, is that udhcpc will eat up huge chunks of
> CPU parsing "uninteresting" packets, on "heavy" loaded networks.
> Bug #6746 names "FRITZ!Box 7570 router (mipsel)" and some unnamed
> kernel version that "Apparently my kernel does not support this filter
> feature".
> Maybe a better alternative would be to either enable the "filter
> kernel feature" (witch will not only benefit busybox, but the whole
                   that's supposed to spell 'which", instead

> system) or to make the BPF filtering a configurable busybox feature.
> That way noone would need to patch the udhcpc source.
> See also the kernel source:
> 	Documentation/networking/filter.txt



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