iptables: default to ip(6)tables-nft

OpenWrt now uses firewall4 (nft) by default,
so iptables should also default to nftables backend.

When multiple packages provide the same virtual package,
opkg pick the first one by alphabetical order,
so we rename iptables-legacy to iptables-zz-legacy and add
iptables-legacy in PROVIDES.

We also need to remove IPTABLES_NFTABLES config as
this cause recursive dependencies.

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
(cherry picked from commit 35fec487e3)

package/network/utils/iptables/Makefile

@@ -10,7 +10,7 @@ include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=iptables
 PKG_VERSION:=1.8.7
-PKG_RELEASE:=6
+PKG_RELEASE:=7
 
 PKG_SOURCE_URL:=https://netfilter.org/projects/iptables/files
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
@@ -50,18 +50,18 @@ $(call Package/iptables/Default)
   DEPENDS+= +kmod-ipt-core +libip4tc +IPV6:libip6tc +libiptext +IPV6:libiptext6 +libxtables
 endef
 
-define Package/iptables-legacy
+define Package/iptables-zz-legacy
 $(call Package/iptables/Default)
   TITLE:=IP firewall administration tool
   DEPENDS+= +xtables-legacy
-  PROVIDES:=iptables
+  PROVIDES:=iptables iptables-legacy
   ALTERNATIVES:=\
     200:/usr/sbin/iptables:/usr/sbin/xtables-legacy-multi \
     200:/usr/sbin/iptables-restore:/usr/sbin/xtables-legacy-multi \
     200:/usr/sbin/iptables-save:/usr/sbin/xtables-legacy-multi
 endef
 
-define Package/iptables-legacy/description
+define Package/iptables-zz-legacy/description
 IP firewall administration tool.
 
  Matches:
@@ -104,7 +104,7 @@ endef
 define Package/xtables-nft
 $(call Package/iptables/Default)
   TITLE:=IP firewall administration tool nft
-  DEPENDS:=@IPTABLES_NFTABLES +libnftnl +libiptext +IPV6:libiptext6 +libiptext-nft +kmod-nft-compat
+  DEPENDS:=+libnftnl +libiptext +IPV6:libiptext6 +libiptext-nft +kmod-nft-compat
 endef
 
 define Package/arptables-nft
@@ -483,12 +483,12 @@ define Package/iptables-mod-checksum/description
 iptables extension for the CHECKSUM calculation target
 endef
 
-define Package/ip6tables-legacy
+define Package/ip6tables-zz-legacy
 $(call Package/iptables/Default)
   DEPENDS:=@IPV6 +kmod-ip6tables +xtables-legacy
   CATEGORY:=Network
   TITLE:=IPv6 firewall administration tool
-  PROVIDES:=ip6tables
+  PROVIDES:=ip6tables ip6tables-legacy
   ALTERNATIVES:=\
     200:/usr/sbin/ip6tables:/usr/sbin/xtables-legacy-multi \
     200:/usr/sbin/ip6tables-restore:/usr/sbin/xtables-legacy-multi \
@@ -575,7 +575,7 @@ define Package/libiptext-nft
  CATEGORY:=Libraries
  TITLE:=IPv4/IPv6 firewall - shared libiptext nft library
  ABI_VERSION:=0
- DEPENDS:=@IPTABLES_NFTABLES +libxtables
+ DEPENDS:=+libxtables
 endef
 
 define Package/libxtables
@@ -594,12 +594,6 @@ define Package/libxtables/config
 	default n
 	help
 		This enable connlabel support in iptables.
-
-  config IPTABLES_NFTABLES
-	bool "Enable Nftables support"
-	default y
-	help
-		This enable nftables support in iptables.
 endef
 
 TARGET_CPPFLAGS := \
@@ -624,7 +618,6 @@ CONFIGURE_ARGS += \
 	--with-xtlibdir=/usr/lib/iptables \
 	--with-xt-lock-name=/var/run/xtables.lock \
 	$(if $(CONFIG_IPTABLES_CONNLABEL),,--disable-connlabel) \
-	$(if $(CONFIG_IPTABLES_NFTABLES),,--disable-nftables) \
 	$(if $(CONFIG_IPV6),,--disable-ipv6)
 
 MAKE_FLAGS := \
@@ -677,7 +670,7 @@ define Package/xtables-legacy/install
 	$(CP) $(PKG_INSTALL_DIR)/usr/sbin/xtables-legacy-multi $(1)/usr/sbin/
 endef
 
-define Package/iptables-legacy/install
+define Package/iptables-zz-legacy/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(CP) $(PKG_INSTALL_DIR)/usr/sbin/iptables-legacy{,-restore,-save} $(1)/usr/sbin/
 	$(INSTALL_DIR) $(1)/usr/lib/iptables
@@ -708,7 +701,7 @@ define Package/iptables-nft/install
 	$(CP) $(PKG_INSTALL_DIR)/usr/sbin/iptables{,-restore}-translate $(1)/usr/sbin/
 endef
 
-define Package/ip6tables-legacy/install
+define Package/ip6tables-zz-legacy/install
 	$(INSTALL_DIR) $(1)/usr/sbin
 	$(CP) $(PKG_INSTALL_DIR)/usr/sbin/ip6tables-legacy{,-restore,-save} $(1)/usr/sbin/
 endef
@@ -771,7 +764,7 @@ $(eval $(call BuildPackage,libiptext))
 $(eval $(call BuildPackage,libiptext6))
 $(eval $(call BuildPackage,libiptext-nft))
 $(eval $(call BuildPackage,xtables-legacy))
-$(eval $(call BuildPackage,iptables-legacy))
+$(eval $(call BuildPackage,iptables-zz-legacy))
 $(eval $(call BuildPackage,xtables-nft))
 $(eval $(call BuildPackage,arptables-nft))
 $(eval $(call BuildPackage,ebtables-nft))
@@ -799,7 +792,7 @@ $(eval $(call BuildPlugin,iptables-mod-nflog,$(IPT_NFLOG-m)))
 $(eval $(call BuildPlugin,iptables-mod-trace,$(IPT_DEBUG-m)))
 $(eval $(call BuildPlugin,iptables-mod-nfqueue,$(IPT_NFQUEUE-m)))
 $(eval $(call BuildPlugin,iptables-mod-checksum,$(IPT_CHECKSUM-m)))
-$(eval $(call BuildPackage,ip6tables-legacy))
+$(eval $(call BuildPackage,ip6tables-zz-legacy))
 $(eval $(call BuildPackage,ip6tables-nft))
 $(eval $(call BuildPlugin,ip6tables-extra,$(IPT_IPV6_EXTRA-m)))
 $(eval $(call BuildPlugin,ip6tables-mod-nat,$(IPT_NAT6-m)))