dccp: Implement lookup table for feature-negotiation information

A lookup table for feature-negotiation information, extracted from RFC
4340/42, is provided by this patch. All currently known features can
be found in this table, along with their feature location, their
default value, and type.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index 6080449fbec9..3978aff197d9 100644
--- a/include/linux/dccp.h
+++ b/include/linux/dccp.h
@@ -176,19 +176,20 @@ enum {
 };
 
 /* DCCP features (RFC 4340 section 6.4) */
-enum {
+enum dccp_feature_numbers {
         DCCPF_RESERVED = 0,
         DCCPF_CCID = 1,
-        DCCPF_SHORT_SEQNOS = 2,         /* XXX: not yet implemented */
+        DCCPF_SHORT_SEQNOS = 2,
         DCCPF_SEQUENCE_WINDOW = 3,
-        DCCPF_ECN_INCAPABLE = 4,        /* XXX: not yet implemented */
+        DCCPF_ECN_INCAPABLE = 4,
         DCCPF_ACK_RATIO = 5,
         DCCPF_SEND_ACK_VECTOR = 6,
         DCCPF_SEND_NDP_COUNT = 7,
         DCCPF_MIN_CSUM_COVER = 8,
-        DCCPF_DATA_CHECKSUM = 9,        /* XXX: not yet implemented */
+        DCCPF_DATA_CHECKSUM = 9,
         /* 10-127 reserved */
         DCCPF_MIN_CCID_SPECIFIC = 128,
+        DCCPF_SEND_LEV_RATE = 192,      /* RFC 4342, sec. 8.4 */
         DCCPF_MAX_CCID_SPECIFIC = 255,
 };