From 9f48ffa1e82e7329b6c1f0299e834713969489dc Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Sun, 28 Jul 2013 15:47:04 +0100
Subject: [PATCH] Apply ceiling of configured dhcp-range leasetime to
 deprecated prefix adverts.

---
 src/dhcp6.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/dhcp6.c b/src/dhcp6.c
index 19e3cde..17e03e5 100644
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -625,6 +625,10 @@ void dhcp_construct_contexts(time_t now)
 	      /* previously constructed context has gone. advertise it's demise */
 	      context->flags |= CONTEXT_OLD;
 	      context->address_lost_time = now;
+	      /* Apply same ceiling of configured lease time as in radv.c */
+	      if (context->saved_valid > context->lease_time)
+		context->saved_valid = context->lease_time;
+	      /* maximum time is 2 hours, from RFC */
 	      if (context->saved_valid > 7200) /* 2 hours */
 		context->saved_valid = 7200;
 	      ra_start_unsolicted(now, context);