1 files changed, 19 insertions, 0 deletions

diff --git a/net/dccp/ackvec.h b/net/dccp/ackvec.h
index db447503b636..6cdca79a99f7 100644
--- a/net/dccp/ackvec.h
+++ b/net/dccp/ackvec.h
@@ -114,4 +114,23 @@ static inline bool dccp_ackvec_is_empty(const struct dccp_ackvec *av)
 {
         return av->av_overflow == 0 && av->av_buf_head == av->av_buf_tail;
 }
+
+/**
+ * struct dccp_ackvec_parsed  -  Record offsets of Ack Vectors in skb
+ * @vec:        start of vector (offset into skb)
+ * @len:        length of @vec
+ * @nonce:      whether @vec had an ECN nonce of 0 or 1
+ * @node:       FIFO - arranged in descending order of ack_ackno
+ * This structure is used by CCIDs to access Ack Vectors in a received skb.
+ */
+struct dccp_ackvec_parsed {
+        u8               *vec,
+                         len,
+                         nonce:1;
+        struct list_head node;
+};
+
+extern int dccp_ackvec_parsed_add(struct list_head *head,
+                                  u8 *vec, u8 len, u8 nonce);
+extern void dccp_ackvec_parsed_cleanup(struct list_head *parsed_chunks);
 #endif /* _ACKVEC_H */