OpenBSD's Relay Daemon (previously known as hoststated).

relayd is a daemon to relay and dynamically redirect incoming
connections to a target host. Its main purposes are to run as a
load-balancer, application layer gateway, or transparent proxy. The
daemon is able to monitor groups of hosts for availability, which is
determined by checking for a specific service common to a host group.

WWW: http://spootnik.org/relayd/

# This port will work on $OSVERSION >= 700049.
# If you want to use on RELENG_6, apply a patch in
# http://www.openbsd.org/cgi-bin/cvsweb/src/sys/net/pf_table.c.diff?r1=1.67&r2=1.68

1 files changed, 44 insertions, 0 deletions

diff --git a/net/relayd/files/patch-d-carp.c b/net/relayd/files/patch-d-carp.c
new file mode 100644
index 000000000000..57cafacf3229
--- /dev/null
+++ b/net/relayd/files/patch-d-carp.c
@@ -0,0 +1,44 @@
+--- relayd/carp.c.orig	2007-12-08 02:17:00.000000000 +0900
++++ relayd/carp.c	2008-01-14 08:43:07.745281030 +0900
+@@ -19,6 +19,7 @@
+ #include <sys/param.h>
+ #include <sys/socket.h>
+ #include <sys/ioctl.h>
++#include <sys/queue.h>
+ 
+ #include <net/if.h>
+ 
+@@ -105,6 +106,7 @@
+ int
+ carp_demote_get(char *group)
+ {
++#if 0
+ 	int			s;
+ 	struct ifgroupreq	ifgr;
+ 
+@@ -131,6 +133,9 @@
+ 
+ 	close(s);
+ 	return ((int)ifgr.ifgr_attrib.ifg_carp_demoted);
++#else
++	return (-1);
++#endif
+ }
+ 
+ int
+@@ -188,6 +193,7 @@
+ int
+ carp_demote_ioctl(char *group, int demote)
+ {
++#if 0
+ 	int			s, res;
+ 	struct ifgroupreq	ifgr;
+ 
+@@ -214,4 +220,7 @@
+ 
+ 	close(s);
+ 	return (res);
++#else
++	return (-1);
++#endif
+ }