added client isolation package

Author: seth0r

package/gluon-client-isolation/Makefile

@@ -0,0 +1,40 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gluon-client-isolation
+
+include ../gluon.mk
+
+define Package/gluon-client-isolation
+  TITLE:=Support for client isolation over batman-adv
+  DEPENDS:=+gluon-core +gluon-ebtables gluon-mesh-batman-adv
+endef
+
+define Package/gluon-client-isolation/description
+	This package provides client isolation in a batman-adv
+	bridged layer 2 network.
+
+	To use it, mesh.isolate must be set in the site or
+	domain configuration.
+
+	When it is set to wireless, wireless clients are isolated from
+	other wireless clients, wireless to wired, wired to wireless
+	and wire to wired traffic is not affected in this mode.
+
+	When it is set to all, wired traffic is also isolated.
+
+	To isolate the clients connected to the same wireless interface,
+	it sets the isolate option in the wireless configuration for
+	the client and owe wifi interfaces.
+
+	To extend the isolation the ap_isolation and isolation_mark
+	options are set for the gluon_bat0 network interface.
+
+	A new filter chain ISOLATED is added to ebtables, through which
+	all traffic of br-client is routed.
+	Depending the value of mesh.isolate, the traffic is marked when
+	it arrives from the interfaces to isolate and batman-adv
+	restores the mark for isolated traffic from other nodes.
+	The marked traffic will not be forwarded to isolated interfaces.
+endef
+
+$(eval $(call BuildPackageGluon,gluon-client-isolation))

package/gluon-client-isolation/luasrc/lib/gluon/ebtables/100-isolated-chain

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+chain('ISOLATED', 'ACCEPT')

package/gluon-client-isolation/luasrc/lib/gluon/ebtables/110-mark-isolated-rules

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+local isolate = require('gluon.site').mesh.isolate("none")
+
+if isolate == "all" then
+	for _,dev in ipairs({ 'eth0', 'eth1', 'client0', 'client1', 'owe0', 'owe1' }) do
+		rule('ISOLATED -i ' .. dev .. ' -j mark --mark-or 0x10 --mark-target CONTINUE')
+	end
+end
+if isolate == "wireless" then
+	for _,dev in ipairs({ 'client0', 'client1', 'owe0', 'owe1' }) do
+		rule('ISOLATED -i ' .. dev .. ' -j mark --mark-or 0x10 --mark-target CONTINUE')
+	end
+end

package/gluon-client-isolation/luasrc/lib/gluon/ebtables/120-drop-marked-isolated-rules

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+local isolate = require('gluon.site').mesh.isolate("none")
+
+if isolate == "all" then
+	for _,dev in ipairs({ 'eth0', 'eth1', 'client0', 'client1', 'owe0', 'owe1' }) do
+		rule('ISOLATED -o ' .. dev .. ' --mark 0x10/0x10 -j DROP')
+	end
+end
+if isolate == "wireless" then
+	for _,dev in ipairs({ 'client0', 'client1', 'owe0', 'owe1' }) do
+		rule('ISOLATED -o ' .. dev .. ' --mark 0x10/0x10 -j DROP')
+	end
+end

package/gluon-client-isolation/luasrc/lib/gluon/ebtables/400-isolated-rules

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+rule('FORWARD --logical-in br-client -j ISOLATED')

package/gluon-client-isolation/luasrc/lib/gluon/upgrade/340-client-isolation

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+#!/usr/bin/lua
+
+local site = require 'gluon.site'
+local wireless = require 'gluon.wireless'
+
+local isolate = site.mesh.isolate("none")
+
+local uci = require('simple-uci').cursor()
+
+wireless.foreach_radio(uci, function(radio)
+	local radio_name = radio['.name']
+	vif = 'client_' .. radio_name
+	if uci:get('wireless', vif) then
+		uci:delete('wireless', vif, 'isolate')
+		if isolate == "all" or isolate == "wireless" then
+			uci:set('wireless', vif, 'isolate', '1')
+		end
+	end
+	vif = 'owe_' .. radio_name
+	if uci:get('wireless', vif) then
+		uci:delete('wireless', vif, 'isolate')
+		if isolate == "all" or isolate == "wireless" then
+			uci:set('wireless', vif, 'isolate', '1')
+		end
+	end
+end)
+
+uci:save('wireless')
+
+uci:delete('network', 'gluon_bat0', 'ap_isolation')
+uci:delete('network', 'gluon_bat0', 'isolation_mark')
+
+if isolate == "all" or isolate == "wireless" then
+	uci:set('network', 'gluon_bat0', 'ap_isolation', '1')
+	uci:set('network', 'gluon_bat0', 'isolation_mark', '0x10/0x10')
+end
+
+uci:save('network')