dccp: Per-socket initialisation of feature negotiation

[deliverable/linux.git] / include / linux / dccp.h

diff --git a/include/linux/dccp.h b/include/linux/dccp.h
index 6080449fbec942b7a1340c4a0c131f1957b33e81..484b8a1fb023ac303ecbc209e9c3228498436f9c 100644 (file)
--- 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,
 };
 
@@ -411,6 +412,7 @@ extern void dccp_minisock_init(struct dccp_minisock *dmsk);
  * @dreq_iss: initial sequence number sent on the Response (RFC 4340, 7.1)
  * @dreq_isr: initial sequence number received on the Request
  * @dreq_service: service code present on the Request (there is just one)
+ * @dreq_featneg: feature negotiation options for this connection
  * The following two fields are analogous to the ones in dccp_sock:
  * @dreq_timestamp_echo: last received timestamp to echo (13.1)
  * @dreq_timestamp_echo: the time of receiving the last @dreq_timestamp_echo
@@ -420,6 +422,7 @@ struct dccp_request_sock {
        __u64                    dreq_iss;
        __u64                    dreq_isr;
        __be32                   dreq_service;
+       struct list_head         dreq_featneg;
        __u32                    dreq_timestamp_echo;
        __u32                    dreq_timestamp_time;
 };
@@ -497,6 +500,7 @@ struct dccp_ackvec;
  * @dccps_mss_cache - current value of MSS (path MTU minus header sizes)
  * @dccps_rate_last - timestamp for rate-limiting DCCP-Sync (RFC 4340, 7.5.4)
  * @dccps_minisock - associated minisock (accessed via dccp_msk)
+ * @dccps_featneg - tracks feature-negotiation state (mostly during handshake)
  * @dccps_hc_rx_ackvec - rx half connection ack vector
  * @dccps_hc_rx_ccid - CCID used for the receiver (or receiving half-connection)
  * @dccps_hc_tx_ccid - CCID used for the sender (or sending half-connection)
@@ -534,6 +538,7 @@ struct dccp_sock {
        __u64                           dccps_ndp_count:48;
        unsigned long                   dccps_rate_last;
        struct dccp_minisock            dccps_minisock;
+       struct list_head                dccps_featneg;
        struct dccp_ackvec              *dccps_hc_rx_ackvec;
        struct ccid                     *dccps_hc_rx_ccid;
        struct ccid                     *dccps_hc_tx_ccid;