Re: [PATCH v11] conf: Support CIDR notation for -a/--address option

[Stefano Brivio <sbrivio@redhat.com>]

On Mon, 16 Feb 2026 15:57:41 -0500
Jon Maloy <jmaloy@redhat.com> wrote:

> We extend the -a/--address option to accept addresses in CIDR notation
> (e.g., 192.168.1.1/24 or 2001:db8::1/64) as an alternative to using
> separate -a and -n options.
> 
> We add a new inany_prefix_pton() helper function that:
> - Parses address strings with a compulsory /prefix_len suffix
> - Validates prefix length based on address family (0-32 for IPv4,
>   0-128 for IPv6), including handling of IPv4-to-IPv6 mapping case.
> 
> For IPv4, the prefix length is stored in ip4.prefix_len when provided.
> For IPv6, the given prefix length is still overridden by the default
> value 64
> 
> Mixing -n and CIDR notation results in an error to catch likely user
> mistakes.
> 
> Also fix a bug in conf_ip4_prefix() that was incorrectly using the
> global 'optarg' instead of its 'arg' parameter.

Applied, apologies for the delay.

At the same time, this still had the conflict with commit 0c611bcd3120
("ip: Add ipproto_name() function"), which I already reported on v9,
two weeks ago, asking to rebase. It's small things but it all adds up.

-- 
Stefano