# HG changeset patch
# User Roy Marples <roy@marples.name>
# Date 1556961542 -3600
# Node ID 78cdda45f5d9e97db0a3036644baae2ea3b52757
# Parent  18ac581d41856004595dd70997cb2359327550c8
DHCPv6: Fix exclude prefix length check.

diff -r 18ac581d4185 -r 78cdda45f5d9 src/dhcp6.c
--- a/src/dhcp6.c	Sat May 04 09:41:16 2019 +0100
+++ b/src/dhcp6.c	Sat May 04 10:19:02 2019 +0100
@@ -2187,14 +2187,14 @@
 			continue;
 		}
 
+		ol--;
 		/* Check option length matches prefix length. */
 		if (((*o - a->prefix_len - 1) / NBBY) + 1 != ol) {
 			logerrx("%s: PD Exclude length mismatch", ifp->name);
 			continue;
 		}
-
 		a->prefix_exclude_len = *o++;
-		ol--;
+
 		memcpy(&a->prefix_exclude, &a->prefix,
 		    sizeof(a->prefix_exclude));
 		nb = a->prefix_len % NBBY;