gluon-core: add VXLAN support for gluon_wired protocol

package/gluon-core/Makefile

@@ -15,7 +15,9 @@ define Package/gluon-core
   SECTION:=gluon
   CATEGORY:=Gluon
   TITLE:=Base files of Gluon
-  DEPENDS:=+gluon-site +libgluonutil +lua-platform-info +lua-simple-uci +lua-hash +luci-lib-jsonc +luci-lib-nixio +odhcp6c +firewall +pretty-hostname
+  DEPENDS:= \
+	+gluon-site +libgluonutil +lua-platform-info +lua-simple-uci +lua-hash +luci-lib-jsonc +luci-lib-nixio \
+	+vxlan +odhcp6c +firewall +pretty-hostname
 endef
 
 define Package/gluon-core/description

package/gluon-core/files/lib/netifd/proto/gluon_wired.sh

@@ -6,21 +6,52 @@ init_proto "$@"
 
 proto_gluon_wired_init_config() {
         proto_config_add_boolean transitive
+        proto_config_add_int index
+        proto_config_add_boolean legacy
+}
+
+xor2() {
+        echo -n "${1:0:1}"
+        echo -n "${1:1:1}" | tr '0123456789abcdef' '23016745ab89efcd'
+}
+
+interface_linklocal() {
+        local macaddr="$(ubus call network.device status '{"name": "'"$1"'"}' | jsonfilter -e '@.macaddr')"
+        local oldIFS="$IFS"; IFS=':'; set -- $macaddr; IFS="$oldIFS"
+
+        echo "fe80::$(xor2 "$1")$2:$3ff:fe$4:$5$6"
 }
 
 proto_gluon_wired_setup() {
         local config="$1"
         local ifname="$2"
 
-        local transitive
-        json_get_vars transitive
+        local meshif="$config"
+
+        local transitive index legacy
+        json_get_vars transitive index legacy
 
         proto_init_update "$ifname" 1
         proto_send_update "$config"
 
+        if [ "${legacy:-0}" -eq 0 ]; then
+                meshif="vx_$config"
+
+                json_init
+                json_add_string name "$meshif"
+                [ -n "$index" ] && json_add_string macaddr "$(lua -lgluon.util -e "print(gluon.util.generate_mac($index))")"
+                json_add_string proto 'vxlan6'
+                json_add_string tunlink "$config"
+                json_add_string ip6addr "$(interface_linklocal "$ifname")"
+                json_add_string peer6addr 'ff02::15c'
+                json_add_int vid "$(lua -lgluon.util -e 'print(tonumber(gluon.util.site_seed_bytes("gluon-mesh-vxlan", 3), 16))')"
+                json_close_object
+                ubus call network add_dynamic "$(json_dump)"
+        fi
+
         json_init
         json_add_string name "${config}_mesh"
-        json_add_string ifname "@${config}"
+        json_add_string ifname "@${meshif}"
         json_add_string proto 'gluon_mesh'
         json_add_boolean fixed_mtu 1
         [ -n "$transitive" ] && json_add_boolean transitive "$transitive"
@@ -29,7 +60,7 @@ proto_gluon_wired_setup() {
 }
 
 proto_gluon_wired_teardown() {
-        export config="$1"
+        local config="$1"
 
         proto_init_update "*" 0
         proto_send_update "$config"