netdev - Re: [PATCH iproute2] utils: also check AF_INET family when rtm_type is RTN

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Date:   Thu, 27 Jul 2017 11:11:20 +0200
From:   Phil Sutter <phil@....cc>
To:     Hangbin Liu <liuhangbin@...il.com>
Cc:     netdev@...r.kernel.org,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Stephen Hemminger <stephen@...workplumber.org>
Subject: Re: [PATCH iproute2] utils: also check AF_INET family when rtm_type
 is RTN_MULTICAST

Hi Hangbin,

On Thu, Jul 27, 2017 at 05:01:49PM +0800, Hangbin Liu wrote:
[...]
> diff --git a/lib/utils.c b/lib/utils.c
> index e77bd30..0479e00 100644
> --- a/lib/utils.c
> +++ b/lib/utils.c
> @@ -1215,5 +1215,6 @@ int get_real_family(int rtm_type, int rtm_family)
>  	if (rtm_type != RTN_MULTICAST)
>  		return rtm_family;
>  
> -	return rtm_family == RTNL_FAMILY_IPMR ? AF_INET : AF_INET6;
> +	return (rtm_family == RTNL_FAMILY_IPMR ||
> +		rtm_family == AF_INET) ? AF_INET : AF_INET6;
>  }

I think this is not very readable. How about this instead:

-       return rtm_family == RTNL_FAMILY_IPMR ? AF_INET : AF_INET6;
+       if (rtm_family == RTNL_FAMILY_IPMR)
+               return AF_INET;
+
+       return rtm_family;

Thanks, Phil