iptables: Add systemd helper unit for IPv6 too

Commit bc66b2f45a added systemd helper
unit for automatic IPv4 rule loading. Complement the effort by adding
systemd helper unit also for automatic IPv6 rule loading.

(From OE-Core rev: 3b8df6b6aba3632de7c3c01c8468fbcedb032493)

Signed-off-by: Niko Mauno <niko.mauno@iki.fi>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/iptables/iptables/ip6tables.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=IPv6 Packet Filtering Framework
+Before=network-pre.target
+Wants=network-pre.target
+
+[Service]
+Type=oneshot
+ExecStart=@SBINDIR@/ip6tables-restore -w -- @RULESDIR@/ip6tables.rules
+ExecReload=@SBINDIR@/ip6tables-restore -w -- @RULESDIR@/ip6tables.rules
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target

meta/recipes-extended/iptables/iptables/iptables.service

@@ -1,12 +1,12 @@
 [Unit]
-Description=Packet Filtering Framework
+Description=IPv4 Packet Filtering Framework
 Before=network-pre.target
 Wants=network-pre.target
 
 [Service]
 Type=oneshot
-ExecStart=@SBINDIR@/iptables-restore @RULESDIR@/iptables.rules
-ExecReload=@SBINDIR@/iptables-restore @RULESDIR@/iptables.rules
+ExecStart=@SBINDIR@/iptables-restore -w -- @RULESDIR@/iptables.rules
+ExecReload=@SBINDIR@/iptables-restore -w -- @RULESDIR@/iptables.rules
 RemainAfterExit=yes
 
 [Install]

meta/recipes-extended/iptables/iptables_1.8.3.bb

@@ -13,11 +13,16 @@ SRC_URI = "http://netfilter.org/projects/iptables/files/iptables-${PV}.tar.bz2 \
            file://0002-configure.ac-only-check-conntrack-when-libnfnetlink-enabled.patch \
            file://iptables.service \
            file://iptables.rules \
+           file://ip6tables.service \
+           file://ip6tables.rules \
 "
 SRC_URI[md5sum] = "29de711d15c040c402cf3038c69ff513"
 SRC_URI[sha256sum] = "a23cac034181206b4545f4e7e730e76e08b5f3dd78771ba9645a6756de9cdd80"
 
-SYSTEMD_SERVICE_${PN} = "iptables.service"
+SYSTEMD_SERVICE_${PN} = "\
+    iptables.service \
+    ${@bb.utils.contains('PACKAGECONFIG', 'ipv6', 'ip6tables.service', '', d)} \
+"
 
 inherit autotools pkgconfig systemd
 
@@ -51,6 +56,16 @@ do_install_append() {
         -e 's,@SBINDIR@,${sbindir},g' \
         -e 's,@RULESDIR@,${IPTABLES_RULES_DIR},g' \
         ${D}${systemd_system_unitdir}/iptables.service
+
+    if ${@bb.utils.contains('PACKAGECONFIG', 'ipv6', 'true', 'false', d)} ; then
+        install -m 0644 ${WORKDIR}/ip6tables.rules ${D}${IPTABLES_RULES_DIR}
+        install -m 0644 ${WORKDIR}/ip6tables.service ${D}${systemd_system_unitdir}
+
+        sed -i \
+            -e 's,@SBINDIR@,${sbindir},g' \
+            -e 's,@RULESDIR@,${IPTABLES_RULES_DIR},g' \
+            ${D}${systemd_system_unitdir}/ip6tables.service
+    fi
 }
 
 PACKAGES += "${PN}-modules"
@@ -75,6 +90,10 @@ RRECOMMENDS_${PN} = " \
     kernel-module-nf-conntrack-ipv4 \
     kernel-module-nf-nat \
     kernel-module-ipt-masquerade \
+    ${@bb.utils.contains('PACKAGECONFIG', 'ipv6', '\
+        kernel-module-ip6table-filter \
+        kernel-module-ip6-tables \
+    ', '', d)} \
 "
 
 FILES_${PN} += "${datadir}/xtables"