# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/net-firewall/iptables/iptables-1.3.1-r3.ebuild,v 1.5 2005/05/03 14:43:25 omkhar Exp $

inherit eutils flag-o-matic toolchain-funcs linux-info

#extensions versions

DESCRIPTION="Linux kernel (2.4+) firewall, NAT and packet mangling tools"
HOMEPAGE="http://www.iptables.org/"
LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~amd64 ~x86 ~sparc ~ppc64"
IUSE="ipv6 static extensions"

DEPEND="virtual/os-headers
		extensions? ( virtual/linux-sources )"
RDEPEND=""

L7_PN="netfilter-layer7"
L7_PV="1.2"
L7_P="${L7_PN}-v${L7_PV}"
L7_PATCH="iptables-layer7-${L7_PV}.patch"
IMQ_PATCH="iptables-1.3.0-imq1.diff"

SRC_URI="http://www.iptables.org/files/${P}.tar.bz2
		extensions? (
			http://www.linuximq.net/patchs/${IMQ_PATCH}
			mirror://sourceforge/l7-filter/${L7_P}.tar.gz
		)"

pkg_setup() {
	if use extensions; then
		einfo "WARNING: 3rd party extensions has been enabled."
		einfo "This means that iptables will use your currently installed"
		einfo "kernel in ${KERNEL_DIR} as headers for iptables."
		einfo ""
		einfo "You may have to patch your kernel to allow iptables to build."
		einfo "Please check http://ftp.netfilter.org/pub/patch-o-matic-ng/snapshot/ for patches"
		einfo "for your kernel."
		einfo ""
		einfo "For layer 7 support emerge net-misc/l7-filter-${L7_PV} before this"
		linux-info_pkg_setup
	fi
}


src_unpack() {
	unpack ${P}.tar.bz2
	use extensions && unpack ${L7_P}.tar.gz
	cd ${S}

	EPATCH_OPTS="-p0" \
	epatch ${FILESDIR}/${PV}-files/install_ipv6_apps.patch.bz2 \
	|| die "epatch install_ipv6_apps.patch.bz2"
	EPATCH_OPTS="-p1" \
	epatch ${FILESDIR}/${PV}-files/install_all_dev_files.patch-${PV}.bz2 \
	|| die "epatch install_all_dev_files.patch-${PV}.bz2"

	# Both of these have been merged upstream
	# EPATCH_OPTS="-p1" epatch ${FILESDIR}/${PV}-files/round-robin.patch
	# security bug 70240
	# EPATCH_OPTS="-p2" epatch ${FILESDIR}/${PV}-files/CAN-2004-0986.patch

	# this provide's grsec's stealth match
	EPATCH_OPTS="-p0" \
	epatch ${FILESDIR}/${PV}-files/grsecurity-1.2.8-iptables.patch-${PV}.bz2 \
	|| die "epatch grsecurity-1.2.8-iptables.patch-${PV}.bz2"

	sed -i "s/PF_EXT_SLIB:=/PF_EXT_SLIB:=stealth /g" extensions/Makefile \
	|| die "failed to enable stealth extension"

	EPATCH_OPTS="-p1" \
	epatch ${FILESDIR}/${PV}-files/${P}-compilefix.patch \
	|| die "epatch ${P}-compilefix.patch"

	if use extensions; then
		EPATCH_OPTS="-p1" epatch ${DISTDIR}/${IMQ_PATCH} \
		|| die "epatch ${IMQ_PATCH}"
		EPATCH_OPTS="-p1" epatch ${WORKDIR}/${L7_P}/${L7_PATCH} \
		|| die "epatch ${L7_PATCH}"
		chmod +x extensions/{.IMQ-test*,.childlevel-test*,.layer7-test*}
	fi
}


src_defs() {
	# these are used in both of src_compile and src_install
	myconf="${myconf} PREFIX="
	myconf="${myconf} LIBDIR=/lib"
	myconf="${myconf} BINDIR=/sbin"
	myconf="${myconf} MANDIR=/usr/share/man"
	myconf="${myconf} INCDIR=/usr/include"
	# iptables and libraries are now installed to /sbin and /lib, so that
	# systems with remote network-mounted /usr filesystems can get their
	# network interfaces up and running correctly without /usr.
	use ipv6 || myconf="${myconf} DO_IPV6=0"
	use static && myconf="${myconf} NO_SHARED_LIBS=0"
	export myconf
	diemsg="Please check http://cvs.iptables.org/patch-o-matic-ng/updates/ if your kernel needs to be patched for iptables"
	export diemsg
}


src_compile() {
	src_defs

	# iptables will NOT work correctly unless -O[123] are present!
	replace-flags -O0 -O2
	if [ -z `get-flag O` ]; then
		append-flags -O2
	fi

	# prevent it from causing ICMP errors.
	# http://bugs.gentoo.org/show_bug.cgi?id=23645
	filter-flags "-fstack-protector"

	if use extensions; then
		make COPT_FLAGS="${CFLAGS}" ${myconf} \
			KERNEL_DIR="${KERNEL_DIR}" \
			CC="$(tc-getCC)" \
			|| die "${diemsg}"
	else
		make COPT_FLAGS="${CFLAGS}" ${myconf} \
			KERNEL_DIR="/usr" \
			CC="$(tc-getCC)" \
			|| die
	fi
}

src_install() {
	src_defs
	if use extensions; then
		make ${myconf} \
			DESTDIR="${D}" \
			KERNEL_DIR="${KERNEL_DIR}" \
			install install-devel || die "${diemsg}"
	else
		make ${myconf} \
			DESTDIR="${D}" \
			KERNEL_DIR="/usr" \
			install install-devel || die
	fi

	dodir /usr/lib
	mv -f ${D}/lib/*.a ${D}/usr/lib

	keepdir /var/lib/iptables
	newinitd ${FILESDIR}/${PN}-1.2.9-r1.init iptables
	newconfd ${FILESDIR}/${PN}-1.2.9-r1.confd iptables

	if use ipv6; then
		keepdir /var/lib/ip6tables
		newinitd ${FILESDIR}/${PN/iptables/ip6tables}-1.2.9-r1.init ip6tables
		newconfd ${FILESDIR}/${PN/iptables/ip6tables}-1.2.9-r1.confd ip6tables
	fi
}

pkg_postinst() {
	einfo "This package now includes an initscript which loads and saves"
	einfo "rules stored in /var/lib/iptables/rules-save"
	useq ipv6 >/dev/null && einfo "and /var/lib/ip6tables/rules-save"
	einfo "This location can be changed in /etc/conf.d/iptables"
	einfo ""
	einfo "If you are using the iptables initsscript you should save your"
	einfo "rules using the new iptables version before rebooting."
	einfo ""
	einfo "If you are upgrading to a >=2.4.21 kernel you may need to rebuild"
	einfo "iptables."
	einfo ""
	ewarn "!!! ipforwarding is now not a part of the iptables initscripts."
	einfo "Until a more permanent solution is implemented adding the following"
	einfo "to /etc/conf.d/local.start will enable ipforwarding at bootup:"
	einfo "  echo \"1\" > /proc/sys/net/ipv4/conf/all/forwarding"
	if useq ipv6; then
		einfo "and/or"
		einfo "  echo \"1\" > /proc/sys/net/ipv6/conf/all/forwarding"
		einfo "for ipv6."
	fi
}