Add new socket options: TCP_KEEPINIT, TCP_KEEPIDLE, TCP_KEEPINTVL and

TCP_KEEPCNT, that allow to control initial timeout, idle time, idle
re-send interval and idle send count on a per-socket basis.

Reviewed by:	andre, bz, lstewart

1 files changed, 6 insertions, 1 deletions

diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h
index bc64ac2..b602c27 100644
--- a/sys/netinet/tcp_var.h
+++ b/sys/netinet/tcp_var.h
@@ -203,7 +203,12 @@ struct tcpcb {
 	struct cc_var	*ccv;		/* congestion control specific vars */
 	struct osd	*osd;		/* storage for Khelp module data */
 
-	uint32_t t_ispare[12];		/* 4 keep timers, 5 UTO, 3 TBD */
+	u_int	t_keepinit;		/* time to establish connection */
+	u_int	t_keepidle;		/* time before keepalive probes begin */
+	u_int	t_keepintvl;		/* interval between keepalives */
+	u_int	t_keepcnt;		/* number of keepalives before close */
+
+	uint32_t t_ispare[8];		/* 5 UTO, 3 TBD */
 	void	*t_pspare2[4];		/* 4 TBD */
 	uint64_t _pad[6];		/* 6 TBD (1-2 CC/RTT?) */
 };