X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Fnet%2Finet_ecn.h;h=2fa14691869ca0299d86be8ed87626e297eb808d;hb=18c0635363364ca2fc2d1cbd65bbf918daf89d1a;hp=2fa8d1341a0afa291e1fd5aa74bf0f7c4c91806f;hpb=0798b1dbfbd9ff2a370c5968c5f0621ef0075fe0;p=pandora-kernel.git

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;