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Subject: Re: [mqtt-comment] Why Maximum Packet Size = 2,684,354,565?


Thank you Ian, Roger.

Understood.
Please revise the type of Maximum Packet Size from Four Byte Integer
to Variable Integer in 2.2.2.2, 3.1.2.11.5, and 3.2.2.3.5.

Regards,
Tatsuzo

2017-08-14 21:34 GMT+09:00 Ian Craggs <icraggs@modelbasedtesting.co.uk>:
> Roger,
>
> then the number listed in the spec is written incorrectly, with an extra 5
> at the end.  I was looking at this this morning.
>
> Ian
>
>
> On 14/08/2017 13:25, Roger Light wrote:
>>
>> Hi Tatsuzo,
>>
>> It's down to the way the "remaining length" value is constructed. It
>> is 4 bytes with the most significant bit of each byte being a
>> continuation bit. This gives us 7 bits of integer data per "byte", so
>> a 28 bit integer in total. 2^28 = 268435456.
>>
>> Cheers,
>>
>> Roger
>>
>>
>> On 14 August 2017 at 13:16, Tatsuzo Osawa <tatsuzo.osawa@gmail.com> wrote:
>>>
>>> Hi there,
>>>
>>> Could you show the reason of magic number "2,684,354,565" of Maximum
>>> Packet Size ?
>>>
>>> Regards,
>>> Tatsuzo Osawa
>>>
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> --
> Ian Craggs
> icraggs@uk.ibm.com                 IBM United Kingdom
> Paho Project Lead; Committer on Mosquitto
>
>
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