brmldproxy: add package

Adds the package brmldproxy from https://github.com/T-X/brmldproxy

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>

net/brmldproxy/Makefile

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: MIT
+# Copyright (C) 2023 Linus Lüssing <linus.luessing@c0d3.blue>
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=brmldproxy
+PKG_RELEASE:=1
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_DATE:=2023-12-31
+PKG_SOURCE_URL=https://github.com/T-X/brmldproxy.git
+PKG_SOURCE_VERSION:=4d7fdb1a5c6e726b4c1930ad411d5571e09fa2f0
+PKG_MIRROR_HASH:=1541eeaf6ae2fb4390448f02c5486da708cfa4d6200be77f884b47a2c86a7d06
+
+PKG_MAINTAINER:=Linus Lüssing <linus.luessing@c0d3.blue>
+PKG_LICENSE:=GPL-2.0-or-later
+PKG_LICENSE_FILES:=LICENSE
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/brmldproxy
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=Bridge MLD Proxy
+  DEPENDS:=+tc
+endef
+
+define Package/brmldproxy/description
+  A userspace controlled MLD proxy implementation for a Linux bridge.
+  The bridge itself will appear as a single multicast listening host
+  to any MLD querier on a configured proxy port, acting in deputy
+  for any other multicast listener behind adjacent bridge ports.
+  This potentially reduces MLD report overhead.
+  brmldproxy further allows to filter out specific multicast groups
+  and bridge ports from its combined MLD report.
+endef
+
+define Package/brmldproxy/install
+	$(INSTALL_DIR) $(1)/usr/sbin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/brmldproxy $(1)/usr/sbin/
+	$(CP) ./files/* $(1)/
+endef
+
+$(eval $(call BuildPackage,brmldproxy))

net/brmldproxy/files/etc/config/brmldproxy

@@ -0,0 +1,20 @@
+#config brmldproxy 'lan'
+#	option disabled '1'
+#	# The bridge to apply brmldproxy to. Either the
+#	# bridge interface name or the UCI network interface
+#	# section name.
+#	option bridge 'lan'
+#	# Currently only "ipv6" is supported, optional.
+#	option family 'ipv6'
+#	# bridge port to proxy to
+#	list proxiedport 'wan0'
+#	# bridge port to proxy from
+#	list includedport 'lan0'
+#	# bridge port to exclude from proxying
+#	list excludedport 'lan1'
+#	# multicast IP address (range) to exclude from proxying
+#	list excludefilter 'ff00::/ff0e::'
+#	list excludefilter 'ff0e::/64'
+#	# multicast IP address (range) to include in proxying
+#	# (includes ff0e::123 even though ff0e::/64 was excluded above)
+#	list includefilter 'ff0e::123'

net/brmldproxy/files/etc/hotplug.d/iface/50-brmldproxy

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: MIT
+# Copyright (C) 2023 Linus Lüssing <linus.luessing@c0d3.blue>
+
+. /lib/functions.sh
+
+[ -z "$INTERFACE" ] && exit 0
+[ "$ACTION" != "ifup" ] && [ "$ACTION" != "ifdown" ] && exit 0
+
+/etc/init.d/brmldproxy enabled || exit 0
+
+
+brmldproxy_handle() {
+	local cfg="$1"
+	local disabled
+	local bridge
+
+	config_get_bool disabled "$cfg" disabled 0
+	[ "$disabled" -gt 0 ] && return 0
+
+	config_get bridge "$cfg" bridge
+
+	[ -z "$bridge" ] && return 0
+	[ "$bridge" != "$INTERFACE" ] && return 0
+
+	if [ "$ACTION" = "ifup" ]; then
+		/etc/init.d/brmldproxy start "$cfg" || return 0
+	else
+		/etc/init.d/brmldproxy stop "brmldproxy.$cfg" || return 0
+	fi
+
+	# success, stop
+	return 1
+}
+
+config_load brmldproxy
+
+config_foreach brmldproxy_handle brmldproxy

net/brmldproxy/files/etc/init.d/brmldproxy

@@ -0,0 +1,111 @@
+#!/bin/sh /etc/rc.common
+# SPDX-License-Identifier: MIT
+# Copyright (C) 2023 Linus Lüssing <linus.luessing@c0d3.blue>
+
+USE_PROCD=1
+
+START=19
+STOP=90
+
+brmldproxy_start() {
+	local cfg="$1"
+	local namespace="$2"
+	local disabled
+
+	local ifname
+	local family
+	local bridge
+	local includedports
+	local excludedports
+	local proxiedports
+	local includefilters
+	local excludefilters
+
+	config_get_bool disabled "$cfg" disabled 0
+	[ "$disabled" -gt 0 ] && return 0
+
+	config_get bridge "$cfg" "bridge"
+	config_get family "$cfg" "family"
+	config_get includedports "$cfg" "includedport"
+	config_get excludedports "$cfg" "excludedport"
+	config_get proxiedports "$cfg" "proxiedport"
+	config_get includefilters "$cfg" "includefilter"
+	config_get excludefilters "$cfg" "excludefilter"
+
+	[ -z "$bridge" ] && {
+		echo "Error: no bridge specified for $cfg" >&2
+		return 0
+	}
+
+	. /lib/functions/network.sh
+
+	if network_get_device ifname "$bridge" && [ -n "$ifname" ]; then
+		bridge="$ifname"
+	fi
+
+	[ -n "$excludedports" ] && excludedports=$(echo "$excludedports" | sed 's/[^ ]* */-e &/g')
+	[ -n "$includedports" ] && includedports=$(echo "$includedports" | sed 's/[^ ]* */-i &/g')
+	[ -n "$proxiedports" ] && proxiedports=$(echo "$proxiedports" | sed 's/[^ ]* */-p &/g')
+	[ -n "$includefilters" ] && includefilters=$(echo "$includefilters" | sed 's/[^ ]* */-I &/g')
+	[ -n "$excludefilters" ] && excludefilters=$(echo "$excludefilters" | sed 's/[^ ]* */-E &/g')
+
+	[ -z "$namespace" ] && namespace="brmldproxy"
+
+	procd_open_instance "$namespace.$cfg"
+
+	procd_set_param command /usr/sbin/brmldproxy
+	[ "${family}" = "ipv4" ] && procd_append_param command -4
+	[ "${family}" = "ipv6" ] && procd_append_param command -6
+	procd_append_param command -b "$bridge"
+	[ -n "$excludedports" ] && procd_append_param command $excludedports
+	[ -n "$includedports" ] && procd_append_param command $includedports
+	[ -n "$proxiedports" ] && procd_append_param command $proxiedports
+	[ -n "$includefilters" ] && procd_append_param command $includefilters
+	[ -n "$excludefilters" ] && procd_append_param command $excludefilters
+
+	procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
+
+	procd_set_param stderr 1
+	procd_close_instance
+}
+
+start_service() {
+	local cfg="$1"
+	local namespace="$2"
+	local instance_found=0
+
+	. /lib/functions/network.sh
+
+	# no procd boot startup, via hotplug or manual only
+	[ $PPID -eq 1 ] && return 0
+
+	config_cb() {
+		local type="$1"
+		local name="$2"
+		if [ "$type" = "brmldproxy" ]; then
+			if [ -n "$cfg" -a "$cfg" = "$name" ]; then
+				instance_found=1
+			fi
+		fi
+	}
+
+	config_load brmldproxy
+
+	if [ -n "$cfg" ]; then
+		[ "$instance_found" -gt 0 ] || return
+		brmldproxy_start "$cfg" "$namespace"
+	else
+		config_foreach brmldproxy_start brmldproxy "$namespace"
+	fi
+}
+
+stop_service() {
+	local cfg="$1"
+	local namespace="$2"
+
+	[ -z "$namespace" ] && namespace="brmldproxy"
+}
+
+service_triggers() {
+	procd_add_reload_trigger brmldproxy
+}