From: Hans Dedecker <dedeckeh@gmail.com>
Date: Mon, 20 Feb 2017 16:19:06 +0000 (+0100)
Subject: router: fix arithmetic exception fault
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fodhcpd.git;a=commitdiff_plain;h=ba0cac09cc22c911c1c20c2947dd23f795599627

router: fix arithmetic exception fault

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
---

diff --git a/src/router.c b/src/router.c
index dd3f09c..ffafb94 100644
--- a/src/router.c
+++ b/src/router.c
@@ -233,7 +233,8 @@ static int calc_adv_interval(struct interface *iface, uint32_t minvalid,
 		minival = (*maxival >= 9 ? *maxival/3 : *maxival);
 
 	odhcpd_urandom(&msecs, sizeof(msecs));
-	msecs = (labs(msecs) % ((*maxival - minival)*1000)) + minival*1000;
+	msecs = (labs(msecs) % ((*maxival != minival) ? (*maxival - minival)*1000 : 500)) +
+			minival*1000;
 
 	return msecs;
 }