2012/3/28 Simon Perreault <[email protected]> > On 03/28/12 09:22, Tetsuya Murakami wrote: > >> In terms of CNP, CNP needs to be calculated every time if the packet >> is toward to outside of domain because the embedded IPv4 address >> could be different. So, I think there is no difference between CNP >> and recalculation of L4 checksum from the implementation point of >> view. >> > > On the contrary, there is a big difference. The difference is that you are > only concerned with L3. L4 can change: UDP, TCP, ICMP, STCP, DCCP, etc, > etc, etc. You need a lot of code to handle all existing transport > protocols, and you still can't handle future protocols that people might > develop. >
another FYI. RDP (RFC908, RFC1151) has different layout other than TCP/UDP. anyway a special process is needed for it. "you are only concerned with L3" is a mystery. thanks, maoke > > Checksum neutrality is a *big* advantage. > > > Simon > -- > DTN made easy, lean, and smart --> http://postellation.viagenie.ca > NAT64/DNS64 open-source --> http://ecdysis.viagenie.ca > STUN/TURN server --> http://numb.viagenie.ca > _______________________________________________ > Softwires mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/softwires >
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