This diff allows dhcpd to put active leases into a pf table. Dhcpd will then

periodically - based on the length of the shortest lease time - walk across
all leases searching for expired leases which are then removed from the pf
table.

ok henning

1 files changed, 13 insertions, 1 deletions

diff --git a/usr.sbin/dhcpd/dhcpd.8 b/usr.sbin/dhcpd/dhcpd.8
index d5abc76049a..9da7203e6e3 100644
--- a/usr.sbin/dhcpd/dhcpd.8
+++ b/usr.sbin/dhcpd/dhcpd.8
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: dhcpd.8,v 1.10 2006/05/31 09:05:42 jmc Exp $
+.\"	$OpenBSD: dhcpd.8,v 1.11 2006/06/14 14:58:51 ckuethe Exp $
 .\"
 .\" Copyright (c) 1995, 1996 The Internet Software Consortium.
 .\" All rights reserved.
@@ -48,6 +48,7 @@
 .Op Fl dfn
 .Op Fl A Ar abandoned_ip_table
 .Op Fl C Ar changed_ip_table
+.Op Fl L Ar leased_ip_table
 .Op Fl c Ar config-file
 .Op Fl l Ar lease-file
 .Op Fl p Ar pf-device
@@ -178,6 +179,17 @@ When the address is leased to a different machine,
 .Nm
 can remove the address from the overload table, thus allowing a well-behaved
 machine to reuse the address.
+.It Fl L Ar leased_ip_table
+When an address is leased
+.Nm
+will insert it into the
+.Xr pf 4
+table named
+.Ar leased_ip_table .
+Addresses are removed from the table when the lease expires.
+Combined with the table of abandoned addresses, this can help enforce a
+requirement to use DHCP on a network, or can place DHCP users in a different
+class of service.
 Users are cautioned against placing much trust in Ethernet or IP addresses;
 .Xr ifconfig 8
 can be used to trivially change the interface's address, and on a busy DHCP