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Date: Tue, 1 Apr 2008 11:31:05 +0900
From: Hiroshi MIYATA <miyata@tahi.org>
Subject: [dhcptest:00265] Re: Tests for Maximum Retransmission Time
To: dhcptest@tahi.org
Message-Id: <DC2C6061-922A-4004-B0B4-ED0D784E1148@tahi.org>
In-Reply-To: <D49285CA-D185-4232-8E09-195F5781920A@tahi.org>
References: <20080310205322.9ab32c78.mitch@linux.vnet.ibm.com> <20080311203232.6670d3f5.mitch@linux.vnet.ibm.com> <D49285CA-D185-4232-8E09-195F5781920A@tahi.org>
X-Mail-Count: 00265

Chinen-san,

Could you tell me which version of test tool are you using?

Thanks,

....miyata

On 2008/03/12, at 0:45, Hiroshi MIYATA wrote:

> Chinen-san,
>
> Thanks for your update.
> I will examine it.
>
> Sorry for my late response.
>
> ...miyata
>
>
> On 2008/03/11, at 20:32, Mitsuru Chinen wrote:
>
>> Hi there,
>>
>> On Mon, 10 Mar 2008 20:53:22 +0900
>> Mitsuru Chinen <mitch@linux.vnet.ibm.com> wrote:
>>
>>> I think the following tests have a bug.
>>>
>>> rfc3315/
>>>  #32 Part D : Maximum Retransmission Time of solicit message
>>>  #37 Part C : Maximum Retransmission Time of Request messages
>>>  #41 Part C : Maximum Retransmission Time of Request messages
>>>  #46 Part C : Maximum Retransmission Time of Renew message, T1 and  
>>> T2 non-zero
>>>  #50 Part C : Maximum Retransmission Time of Rebind message, T1  
>>> and T2 non-zero
>>> rfc3736/
>>>  #13 Part C : Maximum Retransmission Time of Information-request  
>>> message
>>>
>>> Regarding RT, Section 14 in RFC3315 says:
>>>
>>>>  RT for each subsequent message transmission is based on the  
>>>> previous
>>>>  value of RT:
>>>>
>>>>     RT = 2*RTprev + RAND*RTprev
>>>>
>>>>  MRT specifies an upper bound on the value of RT (disregarding the
>>>>  randomization added by the use of RAND).  If MRT has a value of 0,
>>>>  there is no upper limit on the value of RT.  Otherwise:
>>>>
>>>>     if (RT > MRT)
>>>>        RT = MRT + RAND*MRT
>>>
>>> However, the test doesn't recalculate $timeout, expected RT, when
>>> timeout is bigger than MRT.
>>
>> Excuse me, I sent wrong patch in previous mail.
>> Here's the correct one.
>>
>> Best Regards,
>> ----
>> Mitsuru Chinen <mitch@linux.vnet.ibm.com>
>>
>>
>> diff --git a/rfc3315/C_RFC3315_17_1_2_SolRetransMRT.seq b/rfc3315/ 
>> C_RFC3315_17_1_2_SolRetransMRT.seq
>> index 26183e7..658aa4c 100755
>> --- a/rfc3315/C_RFC3315_17_1_2_SolRetransMRT.seq
>> +++ b/rfc3315/C_RFC3315_17_1_2_SolRetransMRT.seq
>> @@ -126,6 +126,11 @@ while($mrtflag < $MAXCOUNT){
>> 	}
>> 	$initflag=1;
>>
>> +	# If $timeout is bigger than MRT, expected RT is MRT + RAND * MRT
>> +	if($timeout > $MRT){
>> +		$timeout = (1 + $RAND) * $MRT;
>> +	}
>> +
>> #
>> #----------- Wait for next retransmission
>> #
>> diff --git a/rfc3315/C_RFC3315_18_1_1_ReqRetransMRT.seq b/rfc3315/ 
>> C_RFC3315_18_1_1_ReqRetransMRT.seq
>> index a0d25ce..41df69f 100755
>> --- a/rfc3315/C_RFC3315_18_1_1_ReqRetransMRT.seq
>> +++ b/rfc3315/C_RFC3315_18_1_1_ReqRetransMRT.seq
>> @@ -141,6 +141,11 @@ while($mrtflag < $MAXCOUNT){
>> 	}
>> 	$initflag=1;
>>
>> +	# If $timeout is bigger than MRT, expected RT is MRT + RAND * MRT
>> +	if($timeout > $MRT){
>> +		$timeout = (1 + $RAND) * $MRT;
>> +	}
>> +
>> #
>> #----------- Wait for next retransmission
>> #
>> diff --git a/rfc3315/C_RFC3315_18_1_2_CnfRetransMRT.seq b/rfc3315/ 
>> C_RFC3315_18_1_2_CnfRetransMRT.seq
>> index 279248c..4d449d4 100755
>> --- a/rfc3315/C_RFC3315_18_1_2_CnfRetransMRT.seq
>> +++ b/rfc3315/C_RFC3315_18_1_2_CnfRetransMRT.seq
>> @@ -193,6 +193,11 @@ while($mrtflag < $MAXCOUNT){
>> 	}
>> 	$initflag=1;
>>
>> +	# If $timeout is bigger than MRT, expected RT is MRT + RAND * MRT
>> +	if($timeout > $MRT){
>> +		$timeout = (1 + $RAND) * $MRT;
>> +	}
>> +
>> #
>> #----------- Wait for next retransmission
>> #
>> diff --git a/rfc3315/C_RFC3315_18_1_3_RenRetransMRT.seq b/rfc3315/ 
>> C_RFC3315_18_1_3_RenRetransMRT.seq
>> index fcced3a..dd56be9 100755
>> --- a/rfc3315/C_RFC3315_18_1_3_RenRetransMRT.seq
>> +++ b/rfc3315/C_RFC3315_18_1_3_RenRetransMRT.seq
>> @@ -186,6 +186,11 @@ while($mrtflag < $MAXCOUNT){
>> 	}
>> 	$initflag=1;
>>
>> +	# If $timeout is bigger than MRT, expected RT is MRT + RAND * MRT
>> +	if($timeout > $MRT){
>> +		$timeout = (1 + $RAND) * $MRT;
>> +	}
>> +
>> #
>> #----------- Wait for next retransmission
>> #
>> diff --git a/rfc3315/C_RFC3315_18_1_4_RebRetransMRT.seq b/rfc3315/ 
>> C_RFC3315_18_1_4_RebRetransMRT.seq
>> index 617351c..0947e4c 100755
>> --- a/rfc3315/C_RFC3315_18_1_4_RebRetransMRT.seq
>> +++ b/rfc3315/C_RFC3315_18_1_4_RebRetransMRT.seq
>> @@ -183,6 +183,11 @@ while($mrtflag < $MAXCOUNT){
>> 	}
>> 	$initflag = 1;
>>
>> +	# If $timeout is bigger than MRT, expected RT is MRT + RAND * MRT
>> +	if($timeout > $MRT){
>> +		$timeout = (1 + $RAND) * $MRT;
>> +	}
>> +
>> #
>> #----------- Wait for next retransmission
>> #
>> diff --git a/rfc3736/C_RFC3736_INfoRetransMRT.seq b/rfc3736/ 
>> C_RFC3736_INfoRetransMRT.seq
>> index c532a4f..0f9cd4c 100755
>> --- a/rfc3736/C_RFC3736_INfoRetransMRT.seq
>> +++ b/rfc3736/C_RFC3736_INfoRetransMRT.seq
>> @@ -106,6 +106,12 @@ while(check_equal($interval,$INF_MAX_RT,$RAND)){
>> 	}else{
>> 		$timeout = (1 + $RAND) * $IRT;
>> 	}
>> +
>> +	# If $timeout is bigger than MRT, expected RT is MRT + RAND * MRT
>> +	if($timeout > $INF_MAX_RT){
>> +		$timeout = (1 + $RAND) * $INF_MAX_RT;
>> +	}
>> +
>> 	($retinf2,%inf2) = wait_for_information_request($IF0, $timeout + 1);
>> 	$nextime = getReceivedtime(\%inf2);
>> 	if($retinf2 != 0){
>>
>
>