IPV4 conformance and bit DF configuration

Hi,

I work on a custom 8260 board with a 2.4.18 Linux kernel.

I have two questions  about IPV4.

Where can I found, if it exists, a list of conformance between the IPV4 and
the RFCxxx.

I want to set the DF (Don't Fragment bit) in an UDP socket without accessing
the IP header.
I don't find a setsockopt function to do it like for TOS or TTL.


Any ideas about that ?

Thanks all
Gérard Guével


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