From: Jan-Philipp Litza <jplitza@users.noreply.github.com>
Date: Thu, 4 Jul 2019 11:31:25 +0000 (+0200)
Subject: router: support ra_lifetime being 0
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=f6c2242c7af2de8f40f5b6b8e50c350a138bc183;p=oweals%2Fodhcpd.git

router: support ra_lifetime being 0

The value 0 has the special meaning of not being a default router. This
is useful to only advertise prefixes or DNS settings without being a
real router.

Signed-off-by: Jan-Philipp Litza <janphilipp@litza.de>
---

diff --git a/src/router.c b/src/router.c
index 5032428..0040e7a 100644
--- a/src/router.c
+++ b/src/router.c
@@ -354,7 +354,7 @@ static uint32_t calc_ra_lifetime(struct interface *iface, uint32_t maxival)
 
 	if (iface->ra_lifetime >= 0) {
 		lifetime = iface->ra_lifetime;
-		if (lifetime < maxival)
+		if (lifetime > 0 && lifetime < maxival)
 			lifetime = maxival;
 		else if (lifetime > 9000)
 			lifetime = 9000;