Initial commit

package/network/services/umdns/Makefile

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+#
+# Copyright (C) 2014-2023 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=umdns
+PKG_RELEASE:=1
+
+PKG_SOURCE_URL=$(PROJECT_GIT)/project/mdnsd.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_DATE:=2024-01-08
+PKG_SOURCE_VERSION:=e91ed406ecebb4bc08c346929e25f1b819c19edd
+PKG_MIRROR_HASH:=f667e939520f0ce27b63ddcab64eb079d84fd2c61beaad5399bfc5f9276ca62e
+
+PKG_MAINTAINER:=John Crispin <john@phrozen.org>
+PKG_LICENSE:=LGPL-2.1
+
+include $(INCLUDE_DIR)/package-seccomp.mk
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/umdns
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=OpenWrt Multicast DNS Daemon
+  DEPENDS:=+libubox +libubus +libblobmsg-json +libudebug
+endef
+
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
+
+define Package/umdns/conffiles
+/etc/config/umdns
+endef
+
+define Package/umdns/install
+	$(INSTALL_DIR) $(1)/usr/sbin $(1)/etc/init.d $(1)/etc/config
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/umdns $(1)/usr/sbin/
+	$(INSTALL_BIN) ./files/umdns.init $(1)/etc/init.d/umdns
+	$(INSTALL_CONF) ./files/umdns.config $(1)/etc/config/umdns
+	$(call InstallSeccomp,$(1),./files/umdns.json)
+endef
+
+$(eval $(call BuildPackage,umdns))

package/network/services/umdns/files/umdns.config

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+config umdns
+	option jail 1
+	list network lan

package/network/services/umdns/files/umdns.init

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+#!/bin/sh /etc/rc.common
+# Copyright (c) 2014 OpenWrt.org
+
+START=80
+
+USE_PROCD=1
+PROG=/usr/sbin/umdns
+IFACES=""
+
+load_ifaces() {
+	local network="$(uci -q get umdns.@umdns[-1].network)"
+	for n in $network; do
+		local device
+		json_load "$(ifstatus $n)"
+		json_get_var device l3_device
+		echo -n "$device "
+	done
+}
+
+reload_service() {
+	json_init
+	json_add_array interfaces
+	for i in $(load_ifaces); do
+		json_add_string "" "$i"
+	done
+	json_close_array
+
+	ubus call umdns set_config "$(json_dump)"
+}
+
+start_service() {
+	local network="$(uci -q get umdns.@umdns[-1].network)"
+
+	procd_open_instance
+	procd_set_param command "$PROG"
+	[ -f /etc/seccomp/umdns.json ] && procd_set_param seccomp /etc/seccomp/umdns.json
+	procd_set_param respawn
+	procd_open_trigger
+	procd_add_config_trigger "config.change" "umdns" /etc/init.d/umdns reload
+	for n in $network; do
+		procd_add_interface_trigger "interface.*" $n /etc/init.d/umdns reload
+	done
+	procd_add_raw_trigger "instance.update" 5000 "/bin/ubus" "call" "umdns" "reload"
+	procd_close_trigger
+	[ "$(uci get umdns.@umdns[-1].jail)" = 1 ] && {
+		procd_add_jail umdns ubus log
+		[ -d /etc/umdns ] && procd_add_jail_mount "/etc/umdns"
+	}
+	procd_close_instance
+}
+
+service_started() {
+	ubus -t 10 wait_for umdns
+	[ $? = 0 ] && reload_service
+}

package/network/services/umdns/files/umdns.json

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+{
+	"defaultAction": "SCMP_ACT_KILL_PROCESS",
+	"syscalls": [
+		{
+			"names": [
+				"bind",
+				"brk",
+				"clock_gettime",
+				"clock_gettime64",
+				"close",
+				"connect",
+				"epoll_create",
+				"epoll_create1",
+				"epoll_ctl",
+				"epoll_pwait",
+				"epoll_wait",
+				"exit",
+				"exit_group",
+				"fcntl",
+				"fcntl64",
+				"fstat",
+				"ftruncate",
+				"getdents64",
+				"getsockname",
+				"getrandom",
+				"ioctl",
+				"madvise",
+				"mmap",
+				"mmap2",
+				"munmap",
+				"newfstatat",
+				"open",
+				"openat",
+				"pipe",
+				"pipe2",
+				"poll",
+				"ppoll",
+				"read",
+				"recvfrom",
+				"recvmsg",
+				"rt_sigaction",
+				"rt_sigprocmask",
+				"rt_sigreturn",
+				"sendmsg",
+				"sendto",
+				"setsockopt",
+				"sigreturn",
+				"socket",
+				"statx",
+				"time",
+				"uname",
+				"unlinkat",
+				"write",
+				"writev"
+			],
+			"action": "SCMP_ACT_ALLOW"
+		}
+	]
+}