How to calculate the checksum of TCP/IP packet?

[enas]

hi friends
does anyone know how to calculate the checksum of TCP/IP packet, especially for PPP? i wanna use it to generate my own PPP packet using microcontroller

thankz all

 

[Jos Brink]

Re: TCP IP checksum

Hey,, you should download RFC793

just use google..

 

[echo47]

TCP IP checksum

Also get:
RFC 1071: "Computing the Internet Checksum"

I don't see any mention of checksum in PPP:
RFC 1661: "The Point-to-Point Protocol (PPP)"

 

[Truclam]

Re: TCP IP checksum

Hi all,
Does anyone explain this circuit?
I'd like to send data from AVR to web servers and from web servers to AVR
but I don't know how to do that because I don't know how to program the AVR.
For example how to send "12345"string from AVR to web servers?



Please help me?
Best regards.

 

[imarshad]

TCP IP checksum

Although this is a very old question and the asker must have got the answer by now. But for a reference for other who come here through search engines you can find it explained with examples on the following website...
**broken link removed**