# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI="6"

inherit flag-o-matic autotools linux-info pam systemd

DESCRIPTION="A port of KAME's IPsec utilities to the Linux-2.6 IPsec implementation"
HOMEPAGE="http://ipsec-tools.sourceforge.net/"
SRC_URI="mirror://sourceforge/${PN}/${P}.tar.bz2"

LICENSE="BSD GPL-2"
SLOT="0"
KEYWORDS="amd64 arm ~ia64 ~mips ppc ppc64 x86"
IUSE="hybrid idea ipv6 kerberos ldap libressl nat pam rc5 readline selinux stats"

CDEPEND="
	!libressl? ( dev-libs/openssl:0 )
	libressl? ( dev-libs/libressl )
	kerberos? ( virtual/krb5 )
	ldap? ( net-nds/openldap )
	pam? ( sys-libs/pam )
	readline? ( sys-libs/readline:0= )
	selinux? ( sys-libs/libselinux )"

DEPEND="${CDEPEND}
	>=sys-kernel/linux-headers-2.6.30"

RDEPEND="${CDEPEND}
	selinux? ( sec-policy/selinux-ipsec )
"

pkg_preinst() {
	if has_version "<${CATEGORY}/${PN}-0.8.0-r5" ; then
		ewarn
		ewarn "\033[1;33m**************************************************\033[00m"
		ewarn
		if ! has_version "net-vpn/strongswan" &&
			! has_version "net-misc/openswan" &&
			! has_version "net-vpn/libreswan"; then
			ewarn "We found an earlier version of ${PN} installed."
			ewarn "As of ${PN}-0.8.0-r5, the old configuration file,"
			ewarn "ipsec.conf, has been changed to ipsec-tools.conf to avoid"
			ewarn "a conflict with net-vpn/strongswan; bug #436144.  We will"
			ewarn "rename this file for you with this upgrade.  However, if"
			ewarn "you later downgrade, you'll have to rename the file to"
			ewarn "its orignal manually or change /etc/conf.d/racoon to point"
			ewarn "to the new file."

			if [[ -f /etc/ipsec.conf && ! -f /etc/ipsec-tools.conf ]] ; then
				mv /etc/ipsec.conf /etc/ipsec-tools.conf
			else
				ewarn
				ewarn "Oops!  I can't move ipsec.conf to ipsec-tools.conf!"
				ewarn "Either the former doesn't exist or the later does and"
				ewarn "I won't clobber it.  Please fix this situation manually."
			fi
		else
			ewarn "You had both an earlier version of ${PN} and"
			ewarn "net-vpn/strongswan installed.  I can't tell whether"
			ewarn "the configuration file, ipsec.conf, belongs to one"
			ewarn "package or the other due to a file conflict; bug #436144."
			ewarn "The current version of ${PN} uses ipsec-tools.conf"
			ewarn "as its configuration file, as will future versions."
			ewarn "Please fix this situation manually."
		fi
		ewarn
		ewarn "\033[1;33m**************************************************\033[00m"
		ewarn
	fi
}

pkg_setup() {
	linux-info_pkg_setup

	get_version

	if linux_config_exists && kernel_is -ge 2 6 19; then
		ewarn
		ewarn "\033[1;33m**************************************************\033[00m"
		ewarn
		ewarn "Checking kernel configuration in /usr/src/linux or"
		ewarn "or /proc/config.gz for compatibility with ${PN}."
		ewarn "Here are the potential problems:"
		ewarn

		local nothing="1"

		# Check options for all flavors of IPSec
		local msg=""
		for i in XFRM_USER NET_KEY; do
			if ! linux_chkconfig_present ${i}; then
				msg="${msg} ${i}"
			fi
		done
		if [[ ! -z "$msg" ]]; then
			nothing="0"
			ewarn
			ewarn "ALL IPSec may fail. CHECK:"
			ewarn "${msg}"
		fi

		# Check unencrypted IPSec
		if ! linux_chkconfig_present CRYPTO_NULL; then
			nothing="0"
			ewarn
			ewarn "Unencrypted IPSec may fail. CHECK:"
			ewarn " CRYPTO_NULL"
		fi

		# Check IPv4 IPSec
		msg=""
		for i in \
			INET_IPCOMP INET_AH INET_ESP \
			INET_XFRM_MODE_TRANSPORT \
			INET_XFRM_MODE_TUNNEL \
			INET_XFRM_MODE_BEET
		do
			if ! linux_chkconfig_present ${i}; then
				msg="${msg} ${i}"
			fi
		done
		if [[ ! -z "$msg" ]]; then
			nothing="0"
			ewarn
			ewarn "IPv4 IPSec may fail. CHECK:"
			ewarn "${msg}"
		fi

		# Check IPv6 IPSec
		if use ipv6; then
			msg=""
			for i in INET6_IPCOMP INET6_AH INET6_ESP \
				INET6_XFRM_MODE_TRANSPORT \
				INET6_XFRM_MODE_TUNNEL \
				INET6_XFRM_MODE_BEET
			do
				if ! linux_chkconfig_present ${i}; then
					msg="${msg} ${i}"
				fi
			done
			if [[ ! -z "$msg" ]]; then
			nothing="0"
				ewarn
				ewarn "IPv6 IPSec may fail. CHECK:"
				ewarn "${msg}"
			fi
		fi

		# Check IPSec behind NAT
		if use nat; then
			if ! linux_chkconfig_present NETFILTER_XT_MATCH_POLICY; then
				nothing="0"
				ewarn
				ewarn "IPSec behind NAT may fail.  CHECK:"
				ewarn " NETFILTER_XT_MATCH_POLICY"
			fi
		fi

		if [[ $nothing == "1" ]]; then
			ewarn "NO PROBLEMS FOUND"
		fi

		ewarn
		ewarn "WARNING: If your *configured* and *running* kernel"
		ewarn "differ either now or in the future, then these checks"
		ewarn "may lead to misleading results."
		ewarn
		ewarn "\033[1;33m**************************************************\033[00m"
		ewarn
	else
		eerror
		eerror "\033[1;31m**************************************************\033[00m"
		eerror "Make sure that your *running* kernel is/will be >=2.6.19."
		eerror "Building ${PN} now, assuming that you know what you're doing."
		eerror "\033[1;31m**************************************************\033[00m"
		eerror
	fi
}

src_prepare() {
	# fix for bug #124813
	sed -i 's:-Werror::g' "${S}"/configure.ac || die
	# fix for building with gcc-4.6
	sed -i 's: -R: -Wl,-R:' "${S}"/configure.ac || die

	eapply "${FILESDIR}/${PN}-def-psk.patch"
	eapply "${FILESDIR}/${PN}-include-vendoridh.patch"
	eapply "${FILESDIR}"/${PN}-0.8.0-sysctl.patch #425770
	eapply "${FILESDIR}"/${PN}-CVE-2015-4047.patch

	# musl fixes
	eapply "${FILESDIR}"/${PN}-remove__P.patch
	eapply "${FILESDIR}"/${PN}-remove_GLOB_TILDE.patch
	eapply "${FILESDIR}"/${PN}-replace-strtouq.patch

	AT_M4DIR="${S}" eautoreconf

	eapply_user
}

src_configure() {
	#--with-{libiconv,libradius} lead to "Broken getaddrinfo()"
	#--enable-samode-unspec is not supported in linux
	local myconf
	myconf="--with-kernel-headers=/usr/include \
			--enable-adminport \
			--enable-dependency-tracking \
			--enable-dpd \
			--enable-frag \
			--without-libiconv \
			--without-libradius \
			--disable-samode-unspec \
			$(use_enable idea) \
			$(use_enable ipv6) \
			$(use_enable kerberos gssapi) \
			$(use_with ldap libldap) \
			$(use_enable nat natt) \
			$(use_with pam libpam) \
			$(use_enable rc5) \
			$(use_with readline) \
			$(use_enable selinux security-context) \
			$(use_enable stats)"

	use nat && myconf="${myconf} --enable-natt-versions=yes"

	# enable mode-cfg and xauth support
	if use pam; then
		myconf="${myconf} --enable-hybrid"
	else
		myconf="${myconf} $(use_enable hybrid)"
	fi

	econf ${myconf}
}

src_install() {
	emake DESTDIR="${D}" install
	keepdir /var/lib/racoon
	newconfd "${FILESDIR}"/racoon.conf.d-r2 racoon
	newinitd "${FILESDIR}"/racoon.init.d-r3 racoon
	systemd_dounit "${FILESDIR}/ipsec-tools.service"
	systemd_dounit "${FILESDIR}/racoon.service"
	use pam && newpamd "${FILESDIR}"/racoon.pam.d racoon

	insinto /etc
	doins "${FILESDIR}"/ipsec-tools.conf
	insinto /etc/racoon
	doins "${FILESDIR}"/racoon.conf
	doins "${FILESDIR}"/psk.txt
	chmod 400 "${D}"/etc/racoon/psk.txt

	dodoc ChangeLog README NEWS
	dodoc -r src/racoon/samples
	dodoc -r src/racoon/doc
	docinto samples
	newdoc src/setkey/sample.cf ipsec-tools.conf
}

pkg_postinst() {
	if use nat; then
		elog
		elog "You have enabled the nat traversal functionnality."
		elog "Nat versions wich are enabled by default are 00,02,rfc"
		elog "you can find those drafts in the CVS repository:"
		elog "cvs -d anoncvs@anoncvs.netbsd.org:/cvsroot co ipsec-tools"
		elog
		elog "If you feel brave enough and you know what you are"
		elog "doing, you can consider emerging this ebuild with"
		elog "EXTRA_ECONF=\"--enable-natt-versions=08,07,06\""
		elog
	fi

	if use ldap; then
		elog
		elog "You have enabled ldap support with {$PN}."
		elog "The man page does NOT contain any information on it yet."
		elog "Consider using a more recent version or CVS."
		elog
	fi

	elog
	elog "Please have a look in /usr/share/doc/${P} and visit"
	elog "http://www.netbsd.org/Documentation/network/ipsec/"
	elog "to find more information on how to configure this tool."
	elog
}