net-vpn/libreswan: fix glibc/kernel incompatibility, bug 647198

Apply upstream patch to support newer glibc and kernel combinations.
Not applied upstream yet because they also need to support old
distributions. This patch works with current stable glibc 2.25.

Closes: https://bugs.gentoo.org/647198
Package-Manager: Portage-2.3.19, Repoman-2.3.6

net-vpn/libreswan/files/libreswan-3.23-modern-kernels.patch

@@ -0,0 +1,15 @@
+diff --git a/programs/pluto/kernel_netlink.c
+b/programs/pluto/kernel_netlink.c
+index 8cec3a2..a2500f4 100644
+--- a/programs/pluto/kernel_netlink.c
++++ b/programs/pluto/kernel_netlink.c
+@@ -51,8 +51,8 @@
+ #include <linux/if_addr.h>
+ #include <linux/if_link.h>
+
+-#include "libreswan.h" /* before xfrm.h otherwise break on F22 */
+ #include "linux/xfrm.h" /* local (if configured) or system copy */
++#include "libreswan.h" /* before xfrm.h otherwise break on F22 */
+
+ #include "libreswan/pfkeyv2.h"
+ #include "libreswan/pfkey.h"

net-vpn/libreswan/libreswan-3.23-r1.ebuild

@@ -0,0 +1,114 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit systemd toolchain-funcs
+
+SRC_URI="https://download.libreswan.org/${P}.tar.gz"
+KEYWORDS="~amd64 ~ppc ~x86"
+
+DESCRIPTION="IPsec implementation for Linux, fork of Openswan"
+HOMEPAGE="https://libreswan.org/"
+
+LICENSE="GPL-2 BSD-4 RSA DES"
+SLOT="0"
+IUSE="caps curl dnssec ldap pam seccomp selinux systemd test"
+
+COMMON_DEPEND="
+	dev-libs/gmp:0=
+	dev-libs/libevent:0=
+	dev-libs/nspr
+	caps? ( sys-libs/libcap-ng )
+	curl? ( net-misc/curl )
+	dnssec? ( net-dns/unbound net-libs/ldns )
+	ldap? ( net-nds/openldap )
+	pam? ( sys-libs/pam )
+	seccomp? ( sys-libs/libseccomp )
+	selinux? ( sys-libs/libselinux )
+	systemd? ( sys-apps/systemd:0= )
+"
+DEPEND="${COMMON_DEPEND}
+	app-text/docbook-xml-dtd:4.1.2
+	app-text/xmlto
+	dev-libs/nss
+	sys-devel/bison
+	sys-devel/flex
+	virtual/pkgconfig
+	test? ( dev-python/setproctitle )
+"
+RDEPEND="${COMMON_DEPEND}
+	dev-libs/nss[utils(+)]
+	sys-apps/iproute2
+	!net-misc/openswan
+	!net-vpn/strongswan
+	selinux? ( sec-policy/selinux-ipsec )
+"
+
+PATCHES=( "${FILESDIR}/${P}-modern-kernels.patch" )
+
+usetf() {
+	usex "$1" true false
+}
+
+src_prepare() {
+	sed -i -e 's:/sbin/runscript:/sbin/openrc-run:' initsystems/openrc/ipsec.init.in || die
+	sed -i -e '/^install/ s/postcheck//' -e '/^doinstall/ s/oldinitdcheck//' initsystems/systemd/Makefile || die
+	default
+}
+
+src_configure() {
+	tc-export AR CC
+	export INC_USRLOCAL=/usr
+	export INC_MANDIR=share/man
+	export FINALEXAMPLECONFDIR=/usr/share/doc/${PF}
+	export FINALDOCDIR=/usr/share/doc/${PF}/html
+	export INITSYSTEM=openrc
+	export INC_RCDIRS=
+	export INC_RCDEFAULT=/etc/init.d
+	export USERCOMPILE=
+	export USERLINK=
+	export USE_DNSSEC=$(usetf dnssec)
+	export USE_LABELED_IPSEC=$(usetf selinux)
+	export USE_LIBCAP_NG=$(usetf caps)
+	export USE_LIBCURL=$(usetf curl)
+	export USE_LINUX_AUDIT=$(usetf selinux)
+	export USE_LDAP=$(usetf ldap)
+	export USE_SECCOMP=$(usetf seccomp)
+	export USE_SYSTEMD_WATCHDOG=$(usetf systemd)
+	export SD_WATCHDOGSEC=$(usex systemd 200 0)
+	export USE_XAUTHPAM=$(usetf pam)
+	export DEBUG_CFLAGS=
+	export OPTIMIZE_CFLAGS=
+	export WERROR_CFLAGS=
+}
+
+src_compile() {
+	emake all
+	emake -C initsystems INITSYSTEM=systemd UNITDIR="$(systemd_get_systemunitdir)" all
+}
+
+src_test() {
+	: # integration tests only that require set of kvms to be set up
+}
+
+src_install() {
+	default
+	emake -C initsystems INITSYSTEM=systemd UNITDIR="$(systemd_get_systemunitdir)" DESTDIR="${D}" install
+
+	echo "include /etc/ipsec.d/*.secrets" > "${D}"/etc/ipsec.secrets
+	fperms 0600 /etc/ipsec.secrets
+
+	dodoc -r docs
+
+	find "${D}" -type d -empty -delete || die
+}
+
+pkg_postinst() {
+	local IPSEC_CONFDIR=${ROOT%/}/etc/ipsec.d
+	if [[ ! -f ${IPSEC_CONFDIR}/cert8.db ]]; then
+		ebegin "Setting up NSS database in ${IPSEC_CONFDIR}"
+		certutil -N -d "${IPSEC_CONFDIR}" -f <(echo)
+		eend $?
+	fi
+}