Hi Andrew,

>>> +static inline void l_net_clear_host_bits(uint8_t *address, uint8_t prefix_len,
>>> +                                             uint8_t bytes)
>>
>> I'm not super excited about the naming.  What about l_net_prefix_from_address()?
> 
> Ok, I guess host mask is an IPv4 term with the v6 term being interface
> ID.  l_net_prefix_from_address sounds good, or how about

You could also add a separate v4/v6 version instead?  Your set only uses this 
for v6 right now, and you'd be able to drop the bytes parameter?  You could also 
use a static buffer for the return value (or simply a uint32 for the v4 version) 
and make address in-only instead of in-out.

> l_net_mask_prefix?

The use of l_net_prefix_from_address() would make it very clear what is 
happening in netconfig_add_v6_static_address_routes().  l_net_mask_prefix better 
suites the usage in patch 13, though your original naming also works well here.

Question is, if you're already sanitizing & dropping the address portion in 
netconfig_add_v6_static_routes(), do you even need the use of 
l_net_clear_host_bits in patch 13?

Anyhow, maybe the outcome from this discussion is to just put this into 
net-private.h for now and we can agree on the name later if this function needs 
to be exposed into public API.

Regards,
-Denis