[network] [PATCH 3/3] Only call radvd_update if a zone contains an IPv6.

[Stefan Schantl <stefan.schantl@ipfire.org>]

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On systems which lacks any IPv6 configured zone, radvd would be
started with an empty configuration file and crashes which will
brick the system startup and results in a frozen system.

Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
---
 src/functions/functions.routing | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/functions/functions.routing b/src/functions/functions.routing
index c7aac09..4824f34 100644
--- a/src/functions/functions.routing
+++ b/src/functions/functions.routing
@@ -81,7 +81,9 @@ routing_default_update() {
 		routes=$(echo ${routes})
 
 		# Reload radvd configuration
-		[[ "${proto}" = "ipv6" ]] && radvd_update
+		if [[ "${proto}" = "ipv6" ]] && db_exists "${zone}/ipv6"; then
+			radvd_update
+		fi
 
 		# Remove all default routes.
 		if [ -z "${routes}" ]; then
-- 
2.9.3