Subject: Re: [PATCH net-next 2/3] netlink: specs: update rt-rule src/dst attribute types to support IPv4 addresses

From: Jakub Kicinski <[email-masked]>
Date: Wed, 5 Nov 2025 16:13:19 -0800

On Wed, 5 Nov 2025 07:55:47 +0000 Hangbin Liu wrote:
> > > I just realize that most of the address/src/dst in rt-addr/route are
> > > dual stack. The same with FRA_DST. We can't simply change binary to u32.
> > > So can we keep this u32 -> binary change?  
> > 
> > Ah, should have looked at more context..
> > Yes, and in that case without the display-hint?  
> 
> The display-hint is required; otherwise, the displayed src and dst fields
> appear as binary data, and setting the rule’s src/dst values also fails. I
> haven’t checked the code yet, but with
>   - display-hint: ipv4
> the IPv6 addresses are also displayed correctly :)

Heh, we should have called the hint "ip" in that case :)