If the new 'parent' keyword is specified for a host in a table,

inherit the state from another host with the specified Id; no
additional check will be for the inheriting host.  This helps in
scenarios with lots of IP aliases that all point to the same service
on the same host (like web hosting with many SSL domains).

discussed with pyr, tested in different setups

1 files changed, 15 insertions, 2 deletions

diff --git a/usr.sbin/relayd/hce.c b/usr.sbin/relayd/hce.c
index f0cd92cfb47..262f7f646c9 100644
--- a/usr.sbin/relayd/hce.c
+++ b/usr.sbin/relayd/hce.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: hce.c,v 1.41 2008/03/12 10:50:44 pyr Exp $	*/
+/*	$OpenBSD: hce.c,v 1.42 2008/07/19 10:52:32 reyk Exp $	*/
 
 /*
  * Copyright (c) 2006 Pierre-Yves Ritschard <pyr@openbsd.org>
@@ -240,7 +240,7 @@ hce_launch_checks(int fd, short event, void *arg)
 			fatalx("hce_launch_checks: unknown check type");
 
 		TAILQ_FOREACH(host, &table->hosts, entry) {
-			if (host->flags & F_DISABLE)
+			if (host->flags & F_DISABLE || host->conf.parentid)
 				continue;
 			switch (table->conf.check) {
 			case CHECK_ICMP:
@@ -276,6 +276,10 @@ hce_notify_done(struct host *host, const char *msg)
 	struct timeval		 tv_now, tv_dur;
 	u_long			 duration;
 	u_int			 logopt;
+	struct host		*h;
+	int			 hostup;
+
+	hostup = host->up;
 
 	if (host->up == HOST_DOWN && host->retry_cnt) {
 		log_debug("hce_notify_done: host %s retry %d",
@@ -327,6 +331,15 @@ hce_notify_done(struct host *host, const char *msg)
 		snmp_hosttrap(table, host);
 
 	host->last_up = host->up;
+
+	if (TAILQ_EMPTY(&host->children))
+		return;
+
+	/* Notify for all other hosts that inherit the state from this one */
+	TAILQ_FOREACH(h, &host->children, child) {
+		h->up = hostup;		
+		hce_notify_done(h, msg);
+	}
 }
 
 void