diff options
| author |   sthen <sthen@openbsd.org> | 2011-07-06 23:44:20 +0000 |
|---|---|---|
| committer | sthen <sthen@openbsd.org> | 2011-07-06 23:44:20 +0000 |
| commit | 04c823f3c14a1d85985bdd950c5559067538cec9 (patch) | |
| tree | 8da6dfaad9ef6304270558ce982d274c4441d135 /lib | |
| parent | Handle pci_conf_read() faults on reading non-existent registers that result (diff) | |
| download | wireguard-openbsd-04c823f3c14a1d85985bdd950c5559067538cec9.tar.xz wireguard-openbsd-04c823f3c14a1d85985bdd950c5559067538cec9.zip | |
Add sysctl net.inet.tcp.always_keepalive, when this is set the system
behaves as if SO_KEEPALIVE was set on all TCP sockets, forcing keepalives
to be sent every net.inet.tcp.keepidle half-seconds.
In conjunction with a keepidle value greatly reduced from the default,
this can be useful for keeping sessions open if you are stuck on a network
with short NAT or firewall timeouts.
Feedback from various people, ok henning@ claudio@
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libc/gen/sysctl.3 | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3 index 5fd5f847fee..fd04ac0dbfc 100644 --- a/lib/libc/gen/sysctl.3 +++ b/lib/libc/gen/sysctl.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: sysctl.3,v 1.203 2011/06/27 17:43:03 naddy Exp $ +.\" $OpenBSD: sysctl.3,v 1.204 2011/07/06 23:44:20 sthen Exp $ .\" .\" Copyright (c) 1993 .\" The Regents of the University of California. All rights reserved. @@ -27,7 +27,7 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.Dd $Mdocdate: June 27 2011 $ +.Dd $Mdocdate: July 6 2011 $ .Dt SYSCTL 3 .Os .Sh NAME @@ -1575,6 +1575,10 @@ Time to keep alive the initial SYN packet of a TCP handshake. Time after a keepalive probe is sent until, in the absence of any response, another probe is sent. See also tcp.slowhz. +.It Li tcp.always_keepalive +Act as if the option +.Dv SO_KEEPALIVE +was set on all TCP sockets. .It Li tcp.mssdflt The maximum segment size that is used as default for non-local connections. The default value is 512. |