Standard TCP is ACK-clocked, or in other words it must wait for ACKs after
sending a full window size bytes. However, in some particular cases, a
congestion control would like to be able to tell the TCP implementation when it
is possible to send segments through a timer. This patch adds the interface
(completely optional) between a congestion control and the TCP implementation.
Signed-off-by: Natale Patriciello <natale.patricie...@gmail.com>
Tested-by: Ahmed Said <ahmed.s...@uniroma2.it>
---
include/net/tcp.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index be6223c586fa..bf661ccc53a2 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -939,6 +939,14 @@ struct tcp_congestion_ops {
/* get info for inet_diag (optional) */
size_t (*get_info)(struct sock *sk, u32 ext, int *attr,
union tcp_cc_info *info);
+ /* get the expiration time for the send timer (optional) */
+ unsigned long (*get_send_timer_exp_time)(struct sock *sk);
+ /* no data to transmit at the timer expiration (optional) */
+ void (*no_data_to_transmit)(struct sock *sk);
+ /* the send timer is expired (optional) */
+ void (*send_timer_expired)(struct sock *sk);
+ /* the TCP has sent some segments (optional) */
+ void (*segment_sent)(struct sock *sk, u32 sent);
char name[TCP_CA_NAME_MAX];
struct module *owner;
--
2.13.2
