sing-box: restart if the specified interfaces start up

Signed-off-by: brvphoenix <brvphoenix@gmail.com>

net/sing-box/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=sing-box
 PKG_VERSION:=1.8.7
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/SagerNet/sing-box/tar.gz/v$(PKG_VERSION)?

net/sing-box/files/sing-box.conf

@@ -4,4 +4,5 @@ config sing-box 'main'
 	option user 'sing-box'
 	option conffile '/etc/sing-box/config.json'
 	option workdir '/usr/share/sing-box'
-
+#	list ifaces 'wan'
+#	list ifaces 'wan6'

net/sing-box/files/sing-box.init

@@ -3,18 +3,20 @@
 USE_PROCD=1
 START=99
 
-NAME="sing-box"
+script=$(readlink "$initscript")
+NAME="$(basename ${script:-$initscript})"
 PROG="/usr/bin/sing-box"
 
 start_service() {
 	config_load "$NAME"
 
-	local enabled user group conffile workdir
+	local enabled user group conffile workdir ifaces
 	config_get_bool enabled "main" "enabled" "0"
 	[ "$enabled" -eq "1" ] || return 0
 
 	config_get user "main" "user" "root"
 	config_get conffile "main" "conffile"
+	config_get ifaces "main" "ifaces"
 	config_get workdir "main" "workdir" "/usr/share/sing-box"
 
 	mkdir -p "$workdir"
@@ -27,6 +29,7 @@ start_service() {
 	# Use root user if you want to use the TUN mode.
 	procd_set_param user "$user"
 	procd_set_param file "$conffile"
+	[ -z "$ifaces" ] || procd_set_param netdev $ifaces
 	procd_set_param stdout 1
 	procd_set_param stderr 1
 	procd_set_param respawn
@@ -35,5 +38,13 @@ start_service() {
 }
 
 service_triggers() {
+	local ifaces
+	config_load "$NAME"
+	config_get ifaces "main" "ifaces"
+	procd_open_trigger
+	for iface in $ifaces; do
+		procd_add_interface_trigger "interface.*.up" $iface /etc/init.d/$NAME restart
+	done
+	procd_close_trigger
 	procd_add_reload_trigger "$NAME"
 }