diff options
Diffstat (limited to 'net/tipc/msg.h')
| -rw-r--r-- | net/tipc/msg.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 528ba9241acc..ec5c511a9c9c 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -117,6 +117,37 @@ struct tipc_msg { __be32 hdr[15]; }; +/* struct tipc_gap_ack - TIPC Gap ACK block + * @ack: seqno of the last consecutive packet in link deferdq + * @gap: number of gap packets since the last ack + * + * E.g: + * link deferdq: 1 2 3 4 10 11 13 14 15 20 + * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0> + */ +struct tipc_gap_ack { + __be16 ack; + __be16 gap; +}; + +/* struct tipc_gap_ack_blks + * @len: actual length of the record + * @gack_cnt: number of Gap ACK blocks in the record + * @gacks: array of Gap ACK blocks + */ +struct tipc_gap_ack_blks { + __be16 len; + u8 gack_cnt; + u8 reserved; + struct tipc_gap_ack gacks[]; +}; + +#define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \ + sizeof(struct tipc_gap_ack) * (n)) + +#define MAX_GAP_ACK_BLKS 32 +#define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS) + static inline struct tipc_msg *buf_msg(struct sk_buff *skb) { return (struct tipc_msg *)skb->data; |