omcproxy: add new igmpv3 & mldv2 multicast proxy

Signed-off-by: Steven Barth <steven@midlink.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46716 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/network/services/omcproxy/Makefile

+#
+# Copyright (C) 2015 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=omcproxy
+PKG_VERSION:=2015-08-24
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE_URL:=https://github.com/sbyx/omcproxy.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_VERSION:=8df8017b8bc6d31e975d72361d8f9512e743d0c7
+PKG_MAINTAINER:=Steven Barth <cyrus@openwrt.org>
+PKG_LICENSE:=APACHE-2.0
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/omcproxy
+  SECTION:=net
+  CATEGORY:=Network
+  DEPENDS:=+libubox +libubus
+  TITLE:=IGMPv3 and MLDv2 Multicast Proxy
+endef
+
+CMAKE_OPTIONS += -DWITH_LIBUBOX=1 -DWITH_UBUS=1
+
+define Package/omcproxy/install
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_CONF) ./files/omcproxy.config $(1)/etc/config/omcproxy
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/omcproxy.init $(1)/etc/init.d/omcproxy
+	$(INSTALL_DIR) $(1)/usr/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/omcproxy $(1)/usr/sbin/
+endef
+
+$(eval $(call BuildPackage,omcproxy))

package/network/services/omcproxy/files/omcproxy.config

+config proxy
+	option scope global
+	option uplink wan
+	list downlink lan
+
+config proxy
+	option scope global
+	option uplink wan6
+	list downlink lan

package/network/services/omcproxy/files/omcproxy.init

+#!/bin/sh /etc/rc.common
+# Copyright (C) 2010-2014 OpenWrt.org
+
+START=99
+USE_PROCD=1
+PROG=/usr/sbin/omcproxy
+
+# Uncomment to enable verbosity 
+#OPTIONS="-v" 
+PROXIES=""
+
+
+omcproxy_add_proxy() {
+	local uplink downlink scope proxy
+	config_get uplink $1 uplink
+	config_get downlink $1 downlink
+	config_get scope $1 scope
+
+	proxy=""
+
+	network_get_device updev $uplink
+	[ -n "$updev" ] || return 0
+
+	for network in $downlink; do
+		network_get_device downdev $network
+		[ -n "$downdev" ] && proxy="$proxy,$downdev"
+
+		# Disable in-kernel querier while ours is active
+		[ -f /sys/class/net/$downdev/bridge/multicast_querier ] && \
+			echo 0 > /sys/class/net/$downdev/bridge/multicast_querier
+	done
+
+	[ -n "$proxy" ] || return 0
+	[ -n "$scope" ] && proxy="$proxy,scope=$scope"
+
+	PROXIES="$PROXIES $updev$proxy"
+
+}
+
+omcproxy_add_trigger() {
+	local uplink downlink
+	config_get uplink $1 uplink
+	config_get downlink $1 downlink
+
+	for network in $uplink $downlink; do
+		procd_add_interface_trigger "interface.*" $network /etc/init.d/omcproxy restart
+	done
+}
+
+omcproxy_add_firewall() {
+	config_get uplink $1 uplink
+	config_get downlink $1 downlink
+
+	upzone=$(fw3 network $uplink)
+	[ -n "$upzone" ] || return 0
+
+	json_add_object ""
+	json_add_string type rule
+	json_add_string src "$upzone"
+	json_add_string proto igmp
+	json_add_string target ACCEPT
+	json_close_object
+
+	json_add_object ""
+	json_add_string type rule
+	json_add_string family ipv6
+	json_add_string src "$upzone"
+	json_add_string proto icmp
+	json_add_string src_ip fe80::/10
+	json_add_array icmp_type
+		json_add_string "" 130/0
+		json_add_string "" 131/0
+		json_add_string "" 132/0
+		json_add_string "" 143/0
+	json_close_array
+	json_add_string target ACCEPT
+	json_close_object
+
+	for network in $downlink; do
+		downzone=$(fw3 network $network)
+		[ -n "$downzone" ] || continue
+
+		json_add_object ""
+		json_add_string type rule
+		json_add_string src "$upzone"
+		json_add_string dest "$downzone"
+		json_add_string family ipv4
+		json_add_string proto any
+		json_add_string dest_ip "224.0.0.0/4"
+		json_add_string target ACCEPT
+		json_close_object
+
+		json_add_object ""
+		json_add_string type rule
+		json_add_string src "$upzone"
+		json_add_string dest "$downzone"
+		json_add_string family ipv6
+		json_add_string proto any
+		json_add_string dest_ip "ff00::/8"
+		json_add_string target ACCEPT
+		json_close_object
+	done
+}
+
+service_triggers() {
+	procd_add_reload_trigger "omcproxy"
+}
+
+start_service() {
+	include /lib/functions
+
+	config_load omcproxy
+	config_foreach omcproxy_add_proxy proxy
+
+	[ -n "$PROXIES" ] || return 0
+
+	procd_open_instance
+	procd_set_param command $PROG
+	[ -n "$OPTIONS" ] && procd_append_param command $OPTIONS
+	procd_append_param command $PROXIES
+	procd_set_param respawn
+
+	procd_open_trigger
+	config_foreach omcproxy_add_trigger proxy
+	procd_close_trigger
+
+	procd_open_data
+
+	json_add_array firewall
+	config_foreach omcproxy_add_firewall proxy
+	json_close_array
+
+	procd_close_data
+
+	procd_close_instance
+
+	# Increase maximum IPv4 group memberships per socket
+	echo 128 > /proc/sys/net/ipv4/igmp_max_memberships
+}
+
+service_started() {
+	procd_set_config_changed firewall
+}