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

[Ahmad Fatoum]

Hello Sascha,

On 28.11.24 08:52, Sascha Hauer wrote:
> On Thu, Nov 28, 2024 at 08:43:12AM +0100, Ahmad Fatoum wrote:
>> On 28.11.24 08:36, Sascha Hauer wrote:
>>> 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".
>>
>> I wanted to avoid the CONFIG_PRINTF_HEXSTR dependency.
> 
> CONFIG_PRINTF_HEXSTR is for printing hexdumps using printf.
> MAC address printing is compiled in unconditionally (and must be,
> because the ethernet code is using it).

Seems I conflated this with %*phC, I will send a v2. Thanks

> 
> Sascha
> 


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