Include descriptions of the flags and fields printed when dumping the

IPv6 prefix list.

Reviewed by:	hrs
MFC after:	1 week

1 files changed, 30 insertions, 0 deletions

diff --git a/usr.sbin/ndp/ndp.8 b/usr.sbin/ndp/ndp.8
index 223cfba..19da8bb 100644
--- a/usr.sbin/ndp/ndp.8
+++ b/usr.sbin/ndp/ndp.8
@@ -222,6 +222,36 @@ Specify the Cur Hop Limit on the interface.
 Do not try to resolve numeric addresses to hostnames.
 .It Fl p
 Show prefix list.
+The following information will be printed:
+.Bl -tag -width indent
+.It Cm if
+The network interface associated with this prefix.
+.It Cm flags
+The status of the prefix, expressed by a combination of the following
+letters:
+.Pp
+.Bl -tag -width indent -compact
+.It Cm A
+This prefix can be used for stateless address autoconfiguration.
+.It Cm L, Cm O
+This prefix can be used for on-link determination; that is, it can be
+used to determine whether a given destination address is on-link.
+.It Cm D
+There are no reachable routers advertising this prefix.
+.El
+.It Cm vltime
+Valid lifetime; the length of time for which the prefix and a stateless
+autoconfigured address generated from this prefix can be used for the
+source or destination address of a packet.
+.It Cm pltime
+Preferred lifetime; the length of time for which the prefix and a stateless
+autoconfigured address generated from this prefix can be used by upper-layer
+protocols unrestrictedly.
+.It Cm expire
+This is the remaining time that the prefix is in the valid state.
+.It Cm ref
+The number of kernel references held for this prefix.
+.El
 .It Fl P
 Flush all the entries in the prefix list.
 .It Fl r