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

[Ahmad Fatoum]

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.

> 
> Sascha
> 


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