Re: UDP checksum calculation - uses lenght twice ?

Arkady Frenkel <arkadyf@xxxxxxxxxxxxxxxx> schreef in berichtnieuws
O$CK7ba8FHA.2716@xxxxxxxxxxxxxxxxxxxxxxx

Hello Arkady,

> Yes , you have to do that , read about that in RFC793
> Arkady

I know I *have* to (otherwise the checksum isn't :-) ), but the question is
*why*. Why does the checksum use the same length twice ? Is it a goof-up,
or is there some sort of logic behind it ?

By the way : RFC793 is about TCP, and does not mention UDP at all ... Any
hints to where exactly I should look (Allready read RFC768) ?

Regards,
Rudy Wieser



.

Relevant Pages

  • Re: UDP checksum calculation - uses lenght twice ?
    ... "The pseudo header conceptually prefixed to the UDP header contains the ... This information gives protection against misrouted datagrams. ... This checksum procedure is the same as is used in TCP." ... > Arkady Frenkel schreef in berichtnieuws ...
    (microsoft.public.win32.programmer.networks)
  • Re: UDP checksum calculation - uses lenght twice ?
    ... > Arkady Frenkel schreef in berichtnieuws ... >> The checksum also covers a 96 bit pseudo header conceptually ...
    (microsoft.public.win32.programmer.networks)
  • Re: Ininterrupted connection
    ... it is in line of thought that change is generally evil. ... change in connectivity state is twice as evil...) ... >>> Arkady ...
    (microsoft.public.win32.programmer.networks)
Loading