ustp: add OpenWrt STP/RSTP daemon

This integrates with netifd in order to provide STP/RSTP protocol support
in user space. It defaults to using RSTP for bridges with stp enabled.
This daemon has no config files, it uses the configuration passed from
netifd via ubus

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/services/ustp/Makefile

@@ -0,0 +1,41 @@
+#
+# Copyright (C) 2021 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ustp
+PKG_RELEASE:=1
+
+PKG_SOURCE_URL=$(PROJECT_GIT)/project/ustp.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_DATE:=2021-08-25
+PKG_SOURCE_VERSION:=9622264cf92691f18ae9222b0a4c9db95af5d80d
+PKG_MIRROR_HASH:=de4ed29eee21192b60e8683633d916d251bcccd5701bdac83b5ba435189297f1
+
+PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>
+PKG_LICENSE:=GPL-2.0
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/ustp
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=OpenWrt STP/RSTP daemon
+  DEPENDS:=+libubox +libubus
+endef
+
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include -flto
+TARGET_LDFLAGS += -flto -fuse-linker-plugin
+
+define Package/ustp/install
+	$(INSTALL_DIR) $(1)/sbin $(1)/etc/init.d
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/ipkg-install/sbin/* $(1)/sbin/
+	$(INSTALL_BIN) ./files/ustpd.init $(1)/etc/init.d/ustpd
+endef
+
+$(eval $(call BuildPackage,ustp))

package/network/services/ustp/files/ustpd.init

@@ -0,0 +1,14 @@
+#!/bin/sh /etc/rc.common
+# Copyright (c) 2021 OpenWrt.org
+
+START=50
+
+USE_PROCD=1
+PROG=/sbin/ustpd
+
+start_service() {
+	procd_open_instance
+	procd_set_param command "$PROG"
+	procd_set_param respawn
+	procd_close_instance
+}