[PATCH] net: ipv6: Fix IPv6 netmask parsing

[Vyacheslav V. Mitrofanov]

On Fri, 2023-01-06 at 14:22 -0800, seanedmond at linux.microsoft.com
wrote:
> From: Sean Edmond <seanedmond at microsoft.com>
> 
> It should be possible to specify a netmask when
> setting a static IPv6 address.  For example:
> setenv ip6addr 2001:cafe:cafe:cafe::100/64
> 
> The net_prefix_length and net_ip6 should be updated
> properly.
> 
> Signed-off-by: Sean Edmond <seanedmond at microsoft.com>
> ---
>  net/net6.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/net/net6.c b/net/net6.c
> index fdea078788..75577bcea1 100644
> --- a/net/net6.c
> +++ b/net/net6.c
> @@ -47,10 +47,13 @@ static int on_ip6addr(const char *name, const
> char *value, enum env_op op,
>         }
> 
>         mask = strchr(value, '/');
> -       len = strlen(value);
> 
> -       if (mask)
> -               net_prefix_length = simple_strtoul(value + len, NULL,
> 10);
> +       if (mask) {
> +               net_prefix_length = simple_strtoul(mask + 1, NULL,
> 10);
> +               len = mask - value;
> +       } else {
> +               len = strlen(value);
> +       }
> 
>         return string_to_ip6(value, len, &net_ip6);
>  }
> --
> 2.39.0
I do agree with your changes.Thanks

Reviewed-by: Viacheslav Mitrofanov <v.v.mitrofanov at yadro.com>