From 4b241e98270ab83dcae8e678ee8066d65fdb44eb Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 2 Jun 2014 18:13:38 +0000
Subject: [PATCH] netfilter: split off header matching modules not used by the
 default config (reduces rootfs size and memory usage)

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 40983
---
 include/netfilter.mk                      | 16 +++++++++-------
 package/kernel/linux/modules/netfilter.mk | 15 +++++++++++++++
 package/network/utils/iptables/Makefile   | 11 +++++++++++
 3 files changed, 35 insertions(+), 7 deletions(-)

diff --git a/include/netfilter.mk b/include/netfilter.mk
index 1ecbe02eab..906eb0f085 100644
--- a/include/netfilter.mk
+++ b/include/netfilter.mk
@@ -143,17 +143,19 @@ $(eval $(if $(NF_KMOD),$(call nf_add,IPT_IPV6,CONFIG_IP6_NF_RAW, $(P_V6)ip6table
 
 $(eval $(if $(NF_KMOD),,$(call nf_add,IPT_IPV6,CONFIG_IP6_NF_IPTABLES, ip6t_icmp6)))
 
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_AH, $(P_V6)ip6t_ah))
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_EUI64, $(P_V6)ip6t_eui64))
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_FRAG, $(P_V6)ip6t_frag))
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_IPV6HEADER, $(P_V6)ip6t_ipv6header))
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_MH, $(P_V6)ip6t_mh))
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_OPTS, $(P_V6)ip6t_hbh))
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MATCH_RT, $(P_V6)ip6t_rt))
 
 $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_LOG, $(P_V6)ip6t_LOG))
 $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_REJECT, $(P_V6)ip6t_REJECT))
 
+# ipv6 extra
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_IPV6HEADER, $(P_V6)ip6t_ipv6header))
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_AH, $(P_V6)ip6t_ah))
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_MH, $(P_V6)ip6t_mh))
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_EUI64, $(P_V6)ip6t_eui64))
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_OPTS, $(P_V6)ip6t_hbh))
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_FRAG, $(P_V6)ip6t_frag))
+$(eval $(call nf_add,IPT_IPV6_EXTRA,CONFIG_IP6_NF_MATCH_RT, $(P_V6)ip6t_rt))
+
 # nat
 
 # kernel only
diff --git a/package/kernel/linux/modules/netfilter.mk b/package/kernel/linux/modules/netfilter.mk
index 974cca717f..316df69f02 100644
--- a/package/kernel/linux/modules/netfilter.mk
+++ b/package/kernel/linux/modules/netfilter.mk
@@ -420,6 +420,21 @@ endef
 
 $(eval $(call KernelPackage,ip6tables))
 
+define KernelPackage/ip6tables-extra
+  SUBMENU:=$(NF_MENU)
+  TITLE:=Extra IPv6 modules
+  DEPENDS:=+kmod-ip6tables
+  KCONFIG:=$(KCONFIG_IPT_IPV6_EXTRA)
+  FILES:=$(foreach mod,$(IPT_IPV6_EXTRA-m),$(LINUX_DIR)/net/$(mod).ko)
+  AUTOLOAD:=$(call AutoLoad,43,$(notdir $(IPT_IPV6_EXTRA-m)))
+endef
+
+define KernelPackage/ip6tables-extra/description
+ Netfilter IPv6 extra header matching modules
+endef
+
+$(eval $(call KernelPackage,ip6tables-extra))
+
 ARP_MODULES = arp_tables arpt_mangle arptable_filter
 define KernelPackage/arptables
   SUBMENU:=$(NF_MENU)
diff --git a/package/network/utils/iptables/Makefile b/package/network/utils/iptables/Makefile
index 48b1879bd3..f6db428bcb 100644
--- a/package/network/utils/iptables/Makefile
+++ b/package/network/utils/iptables/Makefile
@@ -302,6 +302,16 @@ $(call Package/iptables/Default)
 endef
 
 
+define Package/ip6tables-extra
+$(call Package/iptables/Default)
+  DEPENDS:=ip6tables +kmod-ip6tables-extra
+  TITLE:=IPv6 header matching modules
+endef
+
+define Package/ip6tables-mod-extra/description
+iptables header matching modules for IPv6
+endef
+
 define Package/ip6tables-mod-nat
 $(call Package/iptables/Default)
   DEPENDS:=ip6tables +kmod-ipt-nat6
@@ -459,6 +469,7 @@ $(eval $(call BuildPlugin,iptables-mod-tproxy,$(IPT_TPROXY-m)))
 $(eval $(call BuildPlugin,iptables-mod-tee,$(IPT_TEE-m)))
 $(eval $(call BuildPlugin,iptables-mod-u32,$(IPT_U32-m)))
 $(eval $(call BuildPackage,ip6tables))
+$(eval $(call BuildPlugin,ip6tables-extra,$(IPT_IPV6_EXTRA-m)))
 $(eval $(call BuildPlugin,ip6tables-mod-nat,$(IPT_NAT6-m)))
 $(eval $(call BuildPackage,libiptc))
 $(eval $(call BuildPackage,libip4tc))