mwan3: fix rpcd with for routers with no IPv6 support

Signed-off-by: Aaron Goodman <aaronjg@stanford.edu>

net/mwan3/files/lib/mwan3/common.sh

@@ -23,6 +23,9 @@ MMX_UNREACHABLE=""
 MM_UNREACHABLE=""
 MAX_SLEEP=$(((1<<31)-1))
 
+command -v ip6tables > /dev/null
+NO_IPV6=$?
+
 LOG()
 {
 	local facility=$1; shift

net/mwan3/files/lib/mwan3/mwan3.sh

@@ -24,9 +24,6 @@ IPv4_REGEX="((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[0
 
 DEFAULT_LOWEST_METRIC=256
 
-command -v ip6tables > /dev/null
-NO_IPV6=$?
-
 mwan3_push_update()
 {
 	# helper function to build an update string to pass on to

net/mwan3/files/usr/libexec/rpcd/mwan3

@@ -5,8 +5,6 @@
 . /usr/share/libubox/jshn.sh
 . /lib/mwan3/common.sh
 
-MWAN3TRACK_STATUS_DIR="/var/run/mwan3track"
-
 IPS="ipset"
 IPT4="iptables -t mangle -w"
 IPT6="ip6tables -t mangle -w"
@@ -22,6 +20,7 @@ report_connected_v4() {
 }
 
 report_connected_v6() {
+	[ $NO_IPV6 -ne 0 ] && return
 	local address
 
 	if [ -n "$($IPT6 -S mwan3_connected 2> /dev/null)" ]; then
@@ -60,6 +59,7 @@ report_policies_v4() {
 }
 
 report_policies_v6() {
+	[ $NO_IPV6 -ne 0 ] && return
 	local policy
 
 	for policy in $($IPT6 -S | awk '{print $2}' | grep mwan3_policy_ | sort -u); do