mdns: add the new openwrt mdns daemon

this is still wip, you can use the following ubus calls.

ubus call mdns scan	# triggers a scan
ubus call mdns browse	# look at the currenlty cached records
ubus call mdns hosts	# look at the currenlty cached hosts

TODO
- ipv6, currenlty AAAA records are handled but only on v4 sockets
- finish the service announce code

Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 41345

diff --git a/package/network/services/mdns/Makefile b/package/network/services/mdns/Makefile
new file mode 100644 (file)
index 0000000..f3e6f51
--- /dev/null
+++ b/package/network/services/mdns/Makefile
@@ -0,0 +1,41 @@
+#
+# Copyright (C) 2014 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=mdns
+PKG_VERSION:=2014-06-25
+PKG_RELEASE=$(PKG_SOURCE_VERSION)
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE_URL:=git://git.openwrt.org/project/mdnsd.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_VERSION:=902e2d1eaaff0d3d33dee605a4746fd5d4b6b999
+
+PKG_MAINTAINER:=John Crispin <blogic@openwrt.org>
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/mdns
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=OpenWrt Multicast DNS Daemon
+  DEPENDS:=+libubox +libubus +libblobmsg-json
+endef
+
+TARGET_CFLAGS += -I$(STAGING_DIR)/usr/include
+
+define Package/mdns/install
+       $(INSTALL_DIR) $(1)/usr/sbin $(1)/etc/init.d $(1)/etc/config
+       $(INSTALL_BIN) $(PKG_BUILD_DIR)/mdns $(1)/usr/sbin/
+       $(INSTALL_BIN) ./files/mdns.init $(1)/etc/init.d/mdns
+       $(INSTALL_BIN) ./files/mdns.config $(1)/etc/config/mdns
+endef
+
+$(eval $(call BuildPackage,mdns))

diff --git a/package/network/services/mdns/files/mdns.config b/package/network/services/mdns/files/mdns.config
new file mode 100644 (file)
index 0000000..d64ba67
--- /dev/null
+++ b/package/network/services/mdns/files/mdns.config
@@ -0,0 +1,2 @@
+config mdns
+       list network lan

diff --git a/package/network/services/mdns/files/mdns.init b/package/network/services/mdns/files/mdns.init
new file mode 100644 (file)
index 0000000..f66de11
--- /dev/null
+++ b/package/network/services/mdns/files/mdns.init
@@ -0,0 +1,51 @@
+#!/bin/sh /etc/rc.common
+# Copyright (c) 2014 OpenWrt.org
+
+. /lib/functions/network.sh
+
+START=80
+
+USE_PROCD=1
+PROG=/usr/sbin/mdns
+IFACES=""
+
+load_ifaces() {
+       local network="$(uci get mdns.@mdns[-1].network)"
+       for n in $network; do
+               local device
+               json_load "$(ifstatus $network)"
+               json_get_var device l3_device
+               echo -n "$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 mdns set_config "$(json_dump)"
+}
+
+start_service() {
+       local network="$(uci get mdns.@mdns[-1].network)"
+
+       procd_open_instance
+       procd_set_param command "$PROG"
+       procd_set_param respawn
+       procd_open_trigger
+       procd_add_config_trigger "config.change" "mdns" /etc/init.d/mdns reload
+       for n in $network; do
+               procd_add_interface_trigger "interface.*" $n /etc/init.d/mdns reload    
+       done
+       procd_close_trigger
+       procd_close_instance
+}
+
+service_started() {
+       ubus wait_for -t 5 mdns
+       [ $? = 0 ] && reload_service
+}