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Date:   Thu, 29 Sep 2022 18:14:11 +0200
From:   netdev@kapio-technology.com
To:     Stephen Hemminger <stephen@networkplumber.org>
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Subject: Re: [Bridge] [PATCH iproute2-next 2/2] bridge: fdb: enable FDB
 blackhole feature
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On 2022-09-29 17:43, Stephen Hemminger wrote:
> On Thu, 29 Sep 2022 17:21:37 +0200
> Hans Schultz <netdev@kapio-technology.com> wrote:
> 
>> 
>> @@ -493,6 +496,8 @@ static int fdb_modify(int cmd, int flags, int 
>> argc, char **argv)
>>  			req.ndm.ndm_flags |= NTF_EXT_LEARNED;
>>  		} else if (matches(*argv, "sticky") == 0) {
>>  			req.ndm.ndm_flags |= NTF_STICKY;
>> +		} else if (matches(*argv, "blackhole") == 0) {
>> +			ext_flags |= NTF_EXT_BLACKHOLE;
>>  		} else {
>>  			if (strcmp(*argv, "to") == 0)
>>  				NEXT_ARG();
> 
> The parsing of flags is weird here, most of the flags are compared with 
> strcmp()
> but some use matches()..  I should have used strcmp() all the time; but 
> at the
> time did not realize what kind of confusion matches() can cause.

Maybe just change all of them then, and then how about using strncmp() 
and maybe also strnlen() instead?