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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2011-10-22 07:25:23 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-22 07:25:23 +0200 |
| commit | b5d9c9c281395f0967c8d93f42e8b0b8175b5180 (patch) | |
| tree | 81c6e038b5b11a60b3501508257dec516b92cc67 | |
| parent | net: use INET_ECN_MASK instead of hardcoded 3 (diff) | |
| download | linux-b5d9c9c281395f0967c8d93f42e8b0b8175b5180.tar.xz linux-b5d9c9c281395f0967c8d93f42e8b0b8175b5180.zip | |
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: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/inet_ecn.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/inet_ecn.h b/include/net/inet_ecn.h index 2fa8d1341a0a..2fa14691869c 100644 --- a/include/net/inet_ecn.h +++ b/include/net/inet_ecn.h @@ -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; |