net-firewall/iptables: multiple fixes for runscript

- We are now passing iptables "--wait" option to every iptables
  command which needs to aquire a lock. [Bug 501710]

- In addition, "--wait" (IPTABLES_LOCK_WAIT_TIME) and "--wait-interval"
  (IPTABLES_LOCK_WAIT_INTERVAL) is now configurable via
  /etc/conf.d/{iptables,ip6tables}.

- We are now only installing one runscript and now using a symlink
  for the ip6tables runscript.

- Error detection improved/added.

Closes: https://bugs.gentoo.org/501710
Package-Manager: Portage-2.3.52, Repoman-2.3.12
Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>

4 files changed, 342 insertions, 0 deletions

diff --git a/net-firewall/iptables/files/ip6tables-r1.confd b/net-firewall/iptables/files/ip6tables-r1.confd
new file mode 100644
index 000000000000..e608f41d1ea7
--- /dev/null
+++ b/net-firewall/iptables/files/ip6tables-r1.confd
@@ -0,0 +1,27 @@
+# /etc/conf.d/ip6tables
+
+# Set wait option for xtables lock in seconds
+# DEFAULT: 60
+#IPTABLES_LOCK_WAIT_TIME="60"
+
+# Set wait interval option for xtables lock in microseconds
+# DEFAULT: 1000
+#IPTABLES_LOCK_WAIT_INTERVAL="1000"
+
+# Location in which ip6tables initscript will save set rules on
+# service shutdown
+IP6TABLES_SAVE="/var/lib/ip6tables/rules-save"
+
+# Options to pass to ip6tables-save and ip6tables-restore 
+SAVE_RESTORE_OPTIONS="-c"
+
+# Save state on stopping ip6tables
+SAVE_ON_STOP="yes"
+
+# If you need to log ip6tables messages as soon as ip6tables starts,
+# AND your logger does NOT depend on the network, then you may wish
+# to uncomment the next line.
+# If your logger depends on the network, and you uncomment this line
+# you will create an unresolvable circular dependency during startup.
+# After commenting or uncommenting this line, you must run 'rc-update -u'.
+#rc_use="logger"
diff --git a/net-firewall/iptables/files/iptables-r1.confd b/net-firewall/iptables/files/iptables-r1.confd
new file mode 100644
index 000000000000..d5055e0a5d23
--- /dev/null
+++ b/net-firewall/iptables/files/iptables-r1.confd
@@ -0,0 +1,27 @@
+# /etc/conf.d/iptables
+
+# Set wait option for xtables lock in seconds
+# DEFAULT: 60
+#IPTABLES_LOCK_WAIT_TIME="60"
+
+# Set wait interval option for xtables lock in microseconds
+# DEFAULT: 1000
+#IPTABLES_LOCK_WAIT_INTERVAL="1000"
+
+# Location in which iptables initscript will save set rules on
+# service shutdown
+IPTABLES_SAVE="/var/lib/iptables/rules-save"
+
+# Options to pass to iptables-save and iptables-restore 
+SAVE_RESTORE_OPTIONS="-c"
+
+# Save state on stopping iptables
+SAVE_ON_STOP="yes"
+
+# If you need to log iptables messages as soon as iptables starts,
+# AND your logger does NOT depend on the network, then you may wish
+# to uncomment the next line.
+# If your logger depends on the network, and you uncomment this line
+# you will create an unresolvable circular dependency during startup.
+# After commenting or uncommenting this line, you must run 'rc-update -u'.
+#rc_use="logger"
diff --git a/net-firewall/iptables/files/iptables-r1.init b/net-firewall/iptables/files/iptables-r1.init
new file mode 100755
index 000000000000..708dcce6d3c7
--- /dev/null
+++ b/net-firewall/iptables/files/iptables-r1.init
@@ -0,0 +1,159 @@
+#!/sbin/openrc-run
+# Copyright 1999-2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+extra_commands="check save panic"
+extra_started_commands="reload"
+
+iptables_lock_wait_time=${IPTABLES_LOCK_WAIT_TIME:-"60"}
+iptables_lock_wait_interval=${IPTABLES_LOCK_WAIT_INTERVAL:-"1000"}
+
+iptables_name=${SVCNAME}
+case ${iptables_name} in
+	iptables|ip6tables) ;;
+	*) iptables_name="iptables" ;;
+esac
+
+iptables_bin="/sbin/${iptables_name}"
+case ${iptables_name} in
+	iptables)  iptables_proc="/proc/net/ip_tables_names"
+	           iptables_save=${IPTABLES_SAVE};;
+	ip6tables) iptables_proc="/proc/net/ip6_tables_names"
+	           iptables_save=${IP6TABLES_SAVE};;
+esac
+
+depend() {
+	need localmount #434774
+	before net
+}
+
+set_table_policy() {
+	local has_errors=0 chains table=$1 policy=$2
+	case ${table} in
+		nat)    chains="PREROUTING POSTROUTING OUTPUT";;
+		mangle) chains="PREROUTING INPUT FORWARD OUTPUT POSTROUTING";;
+		filter) chains="INPUT FORWARD OUTPUT";;
+		*)      chains="";;
+	esac
+
+	local chain
+	for chain in ${chains} ; do
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -t ${table} -P ${chain} ${policy}
+		[ $? -ne 0 ] && has_errors=1
+	done
+
+	return ${has_errors}
+}
+
+checkkernel() {
+	if [ ! -e ${iptables_proc} ] ; then
+		eerror "Your kernel lacks ${iptables_name} support, please load"
+		eerror "appropriate modules and try again."
+		return 1
+	fi
+	return 0
+}
+
+checkconfig() {
+	if [ -z "${iptables_save}" -o ! -f "${iptables_save}" ] ; then
+		eerror "Not starting ${iptables_name}.  First create some rules then run:"
+		eerror "/etc/init.d/${iptables_name} save"
+		return 1
+	fi
+	return 0
+}
+
+start_pre() {
+	checkkernel || return 1
+	checkconfig || return 1
+}
+
+start() {
+	ebegin "Loading ${iptables_name} state and starting firewall"
+	${iptables_bin}-restore --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} ${SAVE_RESTORE_OPTIONS} < "${iptables_save}"
+	eend $?
+}
+
+stop_pre() {
+	checkkernel || return 1
+}
+
+stop() {
+	if [ "${SAVE_ON_STOP}" = "yes" ] ; then
+		save || return 1
+	fi
+
+	ebegin "Stopping firewall"
+	local has_errors=0 a
+	for a in $(cat ${iptables_proc}) ; do
+		set_table_policy $a ACCEPT
+		[ $? -ne 0 ] && has_errors=1
+
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -F -t $a
+		[ $? -ne 0 ] && has_errors=1
+
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -X -t $a
+		[ $? -ne 0 ] && has_errors=1
+	done
+	eend ${has_errors}
+}
+
+reload() {
+	checkkernel || return 1
+	checkrules || return 1
+	ebegin "Flushing firewall"
+	local has_errors=0 a
+	for a in $(cat ${iptables_proc}) ; do
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -F -t $a
+		[ $? -ne 0 ] && has_errors=1
+
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -X -t $a
+		[ $? -ne 0 ] && has_errors=1
+	done
+	eend ${has_errors}
+
+	start
+}
+
+checkrules() {
+	ebegin "Checking rules"
+	${iptables_bin}-restore --test ${SAVE_RESTORE_OPTIONS} < "${iptables_save}"
+	eend $?
+}
+
+check() {
+	# Short name for users of init.d script.
+	checkrules
+}
+
+save() {
+	ebegin "Saving ${iptables_name} state"
+	checkpath -q -d "$(dirname "${iptables_save}")"
+	checkpath -q -m 0600 -f "${iptables_save}"
+	${iptables_bin}-save ${SAVE_RESTORE_OPTIONS} > "${iptables_save}"
+	eend $?
+}
+
+panic() {
+	checkkernel || return 1
+	if service_started ${iptables_name}; then
+		rc-service ${iptables_name} stop
+	fi
+
+	local has_errors=0 a
+	ebegin "Dropping all packets"
+	for a in $(cat ${iptables_proc}) ; do
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -F -t $a
+		[ $? -ne 0 ] && has_errors=1
+
+		${iptables_bin} --wait ${iptables_lock_wait_time} --wait-interval ${iptables_lock_wait_interval} -X -t $a
+		[ $? -ne 0 ] && has_errors=1
+
+		if [ "${a}" != "nat" ]; then
+			# The "nat" table is not intended for filtering, the use of DROP is therefore inhibited.
+			set_table_policy $a DROP
+			[ $? -ne 0 ] && has_errors=1
+		fi
+	done
+	eend ${has_errors}
+}
diff --git a/net-firewall/iptables/iptables-1.8.2-r1.ebuild b/net-firewall/iptables/iptables-1.8.2-r1.ebuild
new file mode 100644
index 000000000000..9279db2ecc56
--- /dev/null
+++ b/net-firewall/iptables/iptables-1.8.2-r1.ebuild
@@ -0,0 +1,129 @@
+# Copyright 1999-2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+# Force users doing their own patches to install their own tools
+AUTOTOOLS_AUTO_DEPEND=no
+
+inherit multilib systemd toolchain-funcs autotools flag-o-matic
+
+DESCRIPTION="Linux kernel (2.4+) firewall, NAT and packet mangling tools"
+HOMEPAGE="https://www.netfilter.org/projects/iptables/"
+SRC_URI="https://www.netfilter.org/projects/iptables/files/${P}.tar.bz2"
+
+LICENSE="GPL-2"
+# Subslot tracks libxtables as that's the one other packages generally link
+# against and iptables changes.  Will have to revisit if other sonames change.
+SLOT="0/12"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86"
+IUSE="conntrack ipv6 netlink nftables pcap static-libs"
+
+COMMON_DEPEND="
+	conntrack? ( >=net-libs/libnetfilter_conntrack-1.0.6 )
+	netlink? ( net-libs/libnfnetlink )
+	nftables? (
+		>=net-libs/libmnl-1.0:0=
+		>=net-libs/libnftnl-1.1.1:0=
+	)
+	pcap? ( net-libs/libpcap )
+"
+DEPEND="${COMMON_DEPEND}
+	virtual/os-headers
+	>=sys-kernel/linux-headers-4.4:0
+	virtual/pkgconfig
+	nftables? (
+		sys-devel/flex
+		virtual/yacc
+	)
+"
+RDEPEND="${COMMON_DEPEND}
+	nftables? ( net-misc/ethertypes )
+"
+
+src_prepare() {
+	# use the saner headers from the kernel
+	rm -f include/linux/{kernel,types}.h
+
+	# Only run autotools if user patched something
+	eapply_user && eautoreconf || elibtoolize
+}
+
+src_configure() {
+	# Some libs use $(AR) rather than libtool to build #444282
+	tc-export AR
+
+	# Hack around struct mismatches between userland & kernel for some ABIs. #472388
+	use amd64 && [[ ${ABI} == "x32" ]] && append-flags -fpack-struct
+
+	sed -i \
+		-e "/nfnetlink=[01]/s:=[01]:=$(usex netlink 1 0):" \
+		-e "/nfconntrack=[01]/s:=[01]:=$(usex conntrack 1 0):" \
+		configure || die
+
+	local myeconfargs=(
+		--sbindir="${EPREFIX}/sbin"
+		--libexecdir="${EPREFIX}/$(get_libdir)"
+		--enable-devel
+		--enable-shared
+		$(use_enable nftables)
+		$(use_enable pcap bpf-compiler)
+		$(use_enable pcap nfsynproxy)
+		$(use_enable static-libs static)
+		$(use_enable ipv6)
+	)
+	econf "${myeconfargs[@]}"
+}
+
+src_compile() {
+	# Deal with parallel build errors.
+	use nftables && emake -C iptables xtables-config-parser.h
+	emake V=1
+}
+
+src_install() {
+	default
+	dodoc INCOMPATIBILITIES iptables/iptables.xslt
+
+	# all the iptables binaries are in /sbin, so might as well
+	# put these small files in with them
+	into /
+	dosbin iptables/iptables-apply
+	dosym iptables-apply /sbin/ip6tables-apply
+	doman iptables/iptables-apply.8
+
+	insinto /usr/include
+	doins include/iptables.h $(use ipv6 && echo include/ip6tables.h)
+	insinto /usr/include/iptables
+	doins include/iptables/internal.h
+
+	keepdir /var/lib/iptables
+	newinitd "${FILESDIR}"/${PN}-r1.init iptables
+	newconfd "${FILESDIR}"/${PN}-r1.confd iptables
+	if use ipv6 ; then
+		keepdir /var/lib/ip6tables
+		dosym iptables /etc/init.d/ip6tables
+		newconfd "${FILESDIR}"/ip6tables-r1.confd ip6tables
+	fi
+
+	if use nftables; then
+		# Bug 647458
+		rm "${ED%/}"/etc/ethertypes || die
+
+		# Bug 660886
+		rm "${ED%/}"/sbin/{arptables,ebtables} || die
+
+		# Bug 669894
+		rm "${ED%/}"/sbin/ebtables-{save,restore} || die
+	fi
+
+	systemd_dounit "${FILESDIR}"/systemd/iptables-{re,}store.service
+	if use ipv6 ; then
+		systemd_dounit "${FILESDIR}"/systemd/ip6tables-{re,}store.service
+	fi
+
+	# Move important libs to /lib #332175
+	gen_usr_ldscript -a ip{4,6}tc iptc xtables
+
+	find "${ED}" -name "*.la" -delete || die
+}