Transport Mode Q

[Stephen Waters <Stephen.Waters@digital.com>]

 Hi,

	Just had a scan of the likely documents for the definition on what
to deal with the outer header for
	Transport Mode - I suppose this is obvious,  but is it documented in
the ipsec drafts?

	I'm assuming, as a BITW sort of thing,  I need to move the IP
protocol field into one of the extra
	headers I apply, and adjust the packet length:

	[IP][Upper]

	[IP][AH][ESP][IPCOMP][Upper]

	In this example,  IPCOMP next-head needs to copy the value from
[IP],  and [IP] needs it's 
	next prot set to AH,  and so on.  Once compression/encryption is
complete, I write the 
	final length into [IP] and then Authenticate.

	Am I close?

	Steve.

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• From: Stephen Kent <kent@bbn.com>

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