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authorAndrea Bittau <a.bittau@cs.ucl.ac.uk>2006-03-20 17:19:55 -0800
committerDavid S. Miller <davem@davemloft.net>2006-03-20 17:19:55 -0800
commit02bcf28c82c8e4b72c4b89bddbbb6fea1a646d07 (patch)
treed70435d97b3454dcafb6decd6defd603fdf10f82 /net/dccp/ackvec.h
parente229c2fb3370a0c4ebac06cad67ce1cb35abcfe6 (diff)
downloadlinux-2.6.34-ux500-02bcf28c82c8e4b72c4b89bddbbb6fea1a646d07.tar.gz
[DCCP] ackvec: Introduce ack vector records
Based on a patch by Andrea Bittau. Signed-off-by: Andrea Bittau <a.bittau@cs.ucl.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/ackvec.h')
-rw-r--r--net/dccp/ackvec.h31
1 files changed, 25 insertions, 6 deletions
diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index 470bae8a9d0..ec7a89bb7b3 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -13,6 +13,7 @@
#include <linux/config.h>
#include <linux/compiler.h>
+#include <linux/list.h>
#include <linux/time.h>
#include <linux/types.h>
@@ -42,11 +43,8 @@
* Ack Vectors it has recently sent. For each packet sent carrying an
* Ack Vector, it remembers four variables:
*
- * @dccpav_ack_seqno - the Sequence Number used for the packet
- * (HC-Receiver seqno)
* @dccpav_ack_ptr - the value of buf_head at the time of acknowledgement.
- * @dccpav_ack_ackno - the Acknowledgement Number used for the packet
- * (HC-Sender seqno)
+ * @dccpav_records - list of dccp_ackvec_record
* @dccpav_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
*
* @dccpav_time - the time in usecs
@@ -54,8 +52,7 @@
*/
struct dccp_ackvec {
u64 dccpav_buf_ackno;
- u64 dccpav_ack_seqno;
- u64 dccpav_ack_ackno;
+ struct list_head dccpav_records;
struct timeval dccpav_time;
u8 dccpav_buf_head;
u8 dccpav_buf_tail;
@@ -67,6 +64,28 @@ struct dccp_ackvec {
u8 dccpav_buf[DCCP_MAX_ACKVEC_LEN];
};
+/** struct dccp_ackvec_record - ack vector record
+ *
+ * ACK vector record as defined in Appendix A of spec.
+ *
+ * The list is sorted by dccpavr_ack_seqno
+ *
+ * @dccpavr_node - node in dccpav_records
+ * @dccpavr_ack_seqno - sequence number of the packet this record was sent on
+ * @dccpavr_ack_ackno - sequence number being acknowledged
+ * @dccpavr_ack_ptr - pointer into dccpav_buf where this record starts
+ * @dccpavr_ack_nonce - dccpav_ack_nonce at the time this record was sent
+ * @dccpavr_sent_len - lenght of the record in dccpav_buf
+ */
+struct dccp_ackvec_record {
+ struct list_head dccpavr_node;
+ u64 dccpavr_ack_seqno;
+ u64 dccpavr_ack_ackno;
+ u8 dccpavr_ack_ptr;
+ u8 dccpavr_ack_nonce;
+ u8 dccpavr_sent_len;
+};
+
struct sock;
struct sk_buff;