Commit b5d9c9c2 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

inet: add rfc 3168 extract in front of INET_ECN_encapsulate() 



INET_ECN_encapsulate() is better understood if we can read the official
statement.

Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2c67e9ac

include/net/inet_ecn.h

+8 −0
Original line number Diff line number Diff line
@@ -30,6 +30,14 @@ static inline int INET_ECN_is_capable(__u8 dsfield) 
	return dsfield & INET_ECN_ECT_0;

}



/*

 * RFC 3168 9.1.1

 *  The full-functionality option for ECN encapsulation is to copy the

 *  ECN codepoint of the inside header to the outside header on

 *  encapsulation if the inside header is not-ECT or ECT, and to set the

 *  ECN codepoint of the outside header to ECT(0) if the ECN codepoint of

 *  the inside header is CE.

 */

static inline __u8 INET_ECN_encapsulate(__u8 outer, __u8 inner)

{

	outer &= ~INET_ECN_MASK;