[PATCH 4/4] net: implement ethaddr_string_cmp()

[Sascha Hauer]

On Tue, Nov 26, 2024 at 04:17:44PM +0100, Ahmad Fatoum wrote:
> We keep ethernet addresses either in binary or in text form at a couple
> of places, e.g. device tree, device parameters, struct net_device,
> ... etc. We have memcmp() and strcmp() respectively to compare each, add
> one more function to compare a text string with binary. This will be
> used in a follow up commit.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  include/net.h |  2 ++
>  net/lib.c     | 17 +++++++++++++++++
>  2 files changed, 19 insertions(+)
> 
> diff --git a/include/net.h b/include/net.h
> index d9b7953a3c33..dbc45b806a51 100644
> --- a/include/net.h
> +++ b/include/net.h
> @@ -366,6 +366,8 @@ IPaddr_t getenv_ip(const char *name);
>  int setenv_ip(const char *name, IPaddr_t ip);
>  
>  int string_to_ethaddr(const char *str, u8 enetaddr[6]);
> +void ethaddr_to_string(const u8 enetaddr[6], char *str);
> +int ethaddr_string_cmp(const u8 enetaddr_a[6], const char *str_b);
>  
>  #ifdef CONFIG_NET_RESOLV
>  int resolv(const char *host, IPaddr_t *ip);
> diff --git a/net/lib.c b/net/lib.c
> index dc6e138f392c..59bd4c280caf 100644
> --- a/net/lib.c
> +++ b/net/lib.c
> @@ -37,6 +37,23 @@ int string_to_ethaddr(const char *str, u8 enetaddr[ETH_ALEN])
>  	return 0;
>  }
>  
> +void ethaddr_to_string(const u8 enetaddr[ETH_ALEN], char *str)
> +{
> +	sprintf(str, "%02x:%02x:%02x:%02x:%02x:%02x",
> +		 enetaddr[0], enetaddr[1], enetaddr[2], enetaddr[3],
> +		 enetaddr[4], enetaddr[5]);
> +}

Do you reintroduce this function on purpose or due to rebasing
conflicts? A MAC address can now be printed with "%pM".

Sascha

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