git: cf85818e05a9 - main - setkey(8): document NAT-T and NAT-T MTU extensions syntax

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=cf85818e05a9349dfba040fb32e752d3c691ed1f

commit cf85818e05a9349dfba040fb32e752d3c691ed1f
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2023-05-27 06:00:24 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2023-05-29 22:10:02 +0000

    setkey(8): document NAT-T and NAT-T MTU extensions syntax
    
    Reviewed by:    ae
    Discussed with: bz
    Sponsored by:   NVidia networking
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D40300
---
 sbin/setkey/setkey.8 | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/sbin/setkey/setkey.8 b/sbin/setkey/setkey.8
index 38c10546cccb..dfa970397f25 100644
--- a/sbin/setkey/setkey.8
+++ b/sbin/setkey/setkey.8
@@ -29,7 +29,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd April 3, 2023
+.Dd May 27, 2023
 .Dt SETKEY 8
 .Os
 .\"
@@ -283,7 +283,7 @@ and they cannot be used.
 .Pp
 .It Ar extensions
 take some of the following:
-.Bl -tag -width Fl -compact
+.Bl -tag -width Fl natt_mtu -compact
 .\"
 .It Fl m Ar mode
 Specify a security protocol mode for use.
@@ -328,6 +328,21 @@ Do not allow cyclic sequence number.
 .It Fl lh Ar time
 .It Fl ls Ar time
 Specify hard/soft life time duration of the SA.
+.It Fl natt Ar oai \([ Ar sport \(] Ar oar \([ Ar dport \(]
+Manually configure NAT-T for the SA, by specifying initiator
+.Ar oai
+and
+requestor
+.Ar oar
+ip addresses and ports.
+Note that the
+.Sq \([
+and
+.Sq \(]
+symbols are part of the syntax for the ports specification,
+not indication of the optional components.
+.It Fl natt_mtu Ar fragsize
+Configure NAT-T fragment size.
 .El
 .\"
 .Pp