iptables: Support building connlabel module

It is currently possible to enable connlabel-support in iptables.
However, in order for connlabel to work properly, the kernel module must
also be present. This patch adds support for building the
connlabel-module, and selects it by default when connlabel-support is
enabled.

Signed-off-by: Kristian Evensen <kristian.evensen@gmail.com>

include/netfilter.mk

@@ -86,6 +86,10 @@ $(eval $(call nf_add,IPT_CONNTRACK_EXTRA,CONFIG_NETFILTER_XT_MATCH_RECENT, $(P_X
 
 $(eval $(if $(NF_KMOD),,$(call nf_add,IPT_CONNTRACK_EXTRA,CONFIG_NETFILTER_XT_CONNMARK, $(P_XT)xt_CONNMARK)))
 
+#conntrack-label
+
+$(eval $(call nf_add,IPT_CONNTRACK_LABEL,CONFIG_NETFILTER_XT_MATCH_CONNLABEL, $(P_XT)xt_connlabel))
+
 # extra
 
 $(eval $(call nf_add,IPT_EXTRA,CONFIG_NETFILTER_XT_MATCH_ADDRTYPE, $(if $(NF_KMOD),$(P_XT)xt_addrtype,$(P_XT)ipt_addrtype)))

package/kernel/linux/modules/netfilter.mk

@@ -187,6 +187,21 @@ endef
 
 $(eval $(call KernelPackage,ipt-conntrack-extra))
 
+define KernelPackage/ipt-conntrack-label
+  TITLE:=Module for handling connection tracking labels
+  KCONFIG:=$(KCONFIG_IPT_CONNTRACK_LABEL)
+  FILES:=$(foreach mod,$(IPT_CONNTRACK_LABEL-m),$(LINUX_DIR)/net/$(mod).ko)
+  AUTOLOAD:=$(call AutoProbe,$(notdir $(IPT_CONNTRACK_LABEL-m)))
+  $(call AddDepends/ipt,+kmod-ipt-conntrack)
+endef
+
+define KernelPackage/ipt-conntrack-label/description
+ Netfilter (IPv4) module for handling connection tracking labels
+ Includes:
+ - connlabel
+endef
+
+$(eval $(call KernelPackage,ipt-conntrack-label))
 
 define KernelPackage/ipt-filter
   TITLE:=Modules for packet content inspection

package/network/utils/iptables/Makefile

@@ -124,6 +124,20 @@ Extra iptables extensions for connection tracking.
 
 endef
 
+define Package/iptables-mod-conntrack-label
+$(call Package/iptables/Module, +kmod-ipt-conntrack-label @IPTABLES_CONNLABEL)
+  TITLE:=Connection tracking labeling extension
+  DEFAULT:=y if IPTABLES_CONNLABEL
+endef
+
+define Package/iptables-mod-conntrack-label/description
+Match and set label(s) on connection tracking entries
+
+ Matches:
+  - connlabel
+
+endef
+
 define Package/iptables-mod-filter
 $(call Package/iptables/Module, +kmod-ipt-filter)
   TITLE:=Content inspection extensions
@@ -592,6 +606,7 @@ endef
 
 $(eval $(call BuildPackage,iptables))
 $(eval $(call BuildPlugin,iptables-mod-conntrack-extra,$(IPT_CONNTRACK_EXTRA-m)))
+$(eval $(call BuildPlugin,iptables-mod-conntrack-label,$(IPT_CONNTRACK_LABEL-m)))
 $(eval $(call BuildPlugin,iptables-mod-extra,$(IPT_EXTRA-m)))
 $(eval $(call BuildPlugin,iptables-mod-filter,$(IPT_FILTER-m)))
 $(eval $(call BuildPlugin,iptables-mod-ipopt,$(IPT_IPOPT-m)))