From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jiri Pirko <jiri@resnulli.us>
Subject: Re: [patch iproute2] iproute2: ipa: show switch id
Date: Thu, 9 Jul 2015 08:09:18 +0200
Message-ID: <20150709060918.GB2270@nanopsycho.orion>
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 <20150708180510.54c90e74@urahara>
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Cc: netdev@vger.kernel.org
To: Stephen Hemminger <stephen@networkplumber.org>
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Thu, Jul 09, 2015 at 03:05:10AM CEST, stephen@networkplumber.org wrote:
>On Wed,  8 Jul 2015 17:08:18 +0200
>Jiri Pirko <jiri@resnulli.us> wrote:
>
>>  
>> +	if (tb[IFLA_PHYS_SWITCH_ID]) {
>> +		SPRINT_BUF(b1);
>> +		fprintf(fp, "switchid %s ",
>> +			hexstring_n2a(RTA_DATA(tb[IFLA_PHYS_SWITCH_ID]),
>> +				      RTA_PAYLOAD(tb[IFLA_PHYS_SWITCH_ID]),
>> +				      b1, sizeof(b1)));
>> +	}
>> +
>
>Ok, but why hex?

What else? It is an arbitrary byte array.