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	diff --git a/configure.ac b/configure.ac
	index 3cb78af9..d0a5c539 100644
	--- a/configure.ac
	+++ b/configure.ac
	@@ -1,530 +1,538 @@
	#
	# Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
	#
	# Authors: Fabio M. Di Nitto <fabbione@kronosnet.org>
	# Federico Simoncelli <fsimon@kronosnet.org>
	#
	# This software licensed under GPL-2.0+, LGPL-2.0+
	#

	# -- Autoconf --
	# Process this file with autoconf to produce a configure script.
	#

	AC_PREREQ([2.63])
	AC_INIT([kronosnet],
	m4_esyscmd([build-aux/git-version-gen .tarball-version .gitarchivever]),
	[devel@lists.kronosnet.org])
	# Don't let AC_PROC_CC (invoked by AC_USE_SYSTEM_EXTENSIONS) replace
	# undefined CFLAGS with -g -O2, overriding our special OPT_CFLAGS.
	: ${CFLAGS=""}
	AC_USE_SYSTEM_EXTENSIONS
	AM_INIT_AUTOMAKE([1.13 dist-bzip2 dist-xz color-tests -Wno-portability subdir-objects])

	LT_PREREQ([2.2.6])
	# --enable-new-dtags: Use RUNPATH instead of RPATH.
	# It is necessary to have this done before libtool does linker detection.
	# See also: https://github.com/kronosnet/kronosnet/issues/107
	# --as-needed: Modern systems have builtin ceil() making -lm superfluous but
	# AC_SEARCH_LIBS can't detect this because it tests with a false prototype
	AX_CHECK_LINK_FLAG([-Wl,--enable-new-dtags],
	[AM_LDFLAGS=-Wl,--enable-new-dtags],
	[AC_MSG_ERROR(["Linker support for --enable-new-dtags is required"])])
	AX_CHECK_LINK_FLAG([-Wl,--as-needed], [AM_LDFLAGS="$AM_LDFLAGS -Wl,--as-needed"])

	AC_SUBST([AM_LDFLAGS])
	saved_LDFLAGS="$LDFLAGS"
	LDFLAGS="$AM_LDFLAGS $LDFLAGS"
	LT_INIT
	LDFLAGS="$saved_LDFLAGS"

	AC_CONFIG_MACRO_DIR([m4])
	AC_CONFIG_SRCDIR([kronosnetd/main.c])
	AC_CONFIG_HEADERS([config.h])

	AC_CANONICAL_HOST

	AC_LANG([C])

	systemddir=${prefix}/lib/systemd/system

	if test "$prefix" = "NONE"; then
	prefix="/usr"
	if test "$localstatedir" = "\${prefix}/var"; then
	localstatedir="/var"
	fi
	if test "$sysconfdir" = "\${prefix}/etc"; then
	sysconfdir="/etc"
	fi
	if test "$systemddir" = "NONE/lib/systemd/system"; then
	systemddir=/lib/systemd/system
	fi
	if test "$libdir" = "\${exec_prefix}/lib"; then
	if test -e /usr/lib64; then
	libdir="/usr/lib64"
	else
	libdir="/usr/lib"
	fi
	fi
	fi

	AC_PROG_AWK
	AC_PROG_GREP
	AC_PROG_SED
	AC_PROG_CPP
	AC_PROG_CC
	AC_PROG_CC_C99
	if test "x$ac_cv_prog_cc_c99" = "xno"; then
	AC_MSG_ERROR(["C99 support is required"])
	fi
	AC_PROG_LN_S
	AC_PROG_INSTALL
	AC_PROG_MAKE_SET
	PKG_PROG_PKG_CONFIG

	AC_CHECK_PROGS([VALGRIND_EXEC], [valgrind])
	AM_CONDITIONAL([HAS_VALGRIND], [test x$VALGRIND_EXEC != "x"])

	# KNET_OPTION_DEFINES(stem,type,detection code)
	# stem: enters name of option, Automake conditional and preprocessor define
	# type: compress or crypto, determines where the default comes from
	AC_DEFUN([KNET_OPTION_DEFINES],[
	AC_ARG_ENABLE([$2-$1],[AS_HELP_STRING([--disable-$2-$1],[disable libknet $1 support])],,
	[enable_$2_$1="$enable_$2_all"])
	AM_CONDITIONAL([BUILD_]m4_toupper([$2_$1]),[test "x$enable_$2_$1" = xyes])
	if test "x$enable_$2_$1" = xyes; then
	$3
	fi
	AC_DEFINE_UNQUOTED([WITH_]m4_toupper([$2_$1]), [`test "x$enable_$2_$1" != xyes; echo $?`], $1 $2 [built in])
	])

	AC_ARG_ENABLE([man],
	[AS_HELP_STRING([--disable-man],[disable man page creation])],,
	[ enable_man="yes" ])
	AM_CONDITIONAL([BUILD_MAN], [test x$enable_man = xyes])

	AC_ARG_ENABLE([libknet-sctp],
	[AS_HELP_STRING([--disable-libknet-sctp],[disable libknet SCTP support])],,
	[ enable_libknet_sctp="yes" ])
	AM_CONDITIONAL([BUILD_SCTP], [test x$enable_libknet_sctp = xyes])

	AC_ARG_ENABLE([crypto-all],
	[AS_HELP_STRING([--disable-crypto-all],[disable libknet all crypto modules support])],,
	[ enable_crypto_all="yes" ])

	KNET_OPTION_DEFINES([nss],[crypto],[PKG_CHECK_MODULES([nss], [nss])])
	KNET_OPTION_DEFINES([openssl],[crypto],[
	PKG_CHECK_MODULES([openssl],[libcrypto < 1.1],
	[AC_DEFINE_UNQUOTED([BUILDCRYPTOOPENSSL10], [1], [openssl 1.0 crypto])],
	[PKG_CHECK_MODULES([openssl],[libcrypto >= 1.1],
	[AC_DEFINE_UNQUOTED([BUILDCRYPTOOPENSSL11], [1], [openssl 1.1 crypto])])])
	])

	AC_ARG_ENABLE([compress-all],
	[AS_HELP_STRING([--disable-compress-all],[disable libknet all compress modules support])],,
	[ enable_compress_all="yes" ])

	KNET_OPTION_DEFINES([zlib],[compress],[PKG_CHECK_MODULES([zlib], [zlib])])
	KNET_OPTION_DEFINES([lz4],[compress],[PKG_CHECK_MODULES([liblz4], [liblz4])])
	KNET_OPTION_DEFINES([lzo2],[compress],[
	PKG_CHECK_MODULES([lzo2], [lzo2],
	[# work around broken pkg-config file in v2.10
	AC_SUBST([lzo2_CFLAGS],[`echo $lzo2_CFLAGS \| sed 's,/lzo *, ,'`])],
	[AC_CHECK_HEADERS([lzo/lzo1x.h],
	[AC_CHECK_LIB([lzo2], [lzo1x_decompress_safe],
	[AC_SUBST([lzo2_LIBS], [-llzo2])])],
	[AC_MSG_ERROR(["missing required lzo/lzo1x.h header"])])])
	])
	KNET_OPTION_DEFINES([lzma],[compress],[PKG_CHECK_MODULES([liblzma], [liblzma])])
	KNET_OPTION_DEFINES([bzip2],[compress],[
	PKG_CHECK_MODULES([bzip2], [bzip2],,
	[AC_CHECK_HEADERS([bzlib.h],
	[AC_CHECK_LIB([bz2], [BZ2_bzBuffToBuffCompress],
	[AC_SUBST([bzip2_LIBS], [-lbz2])])],
	[AC_MSG_ERROR(["missing required bzlib.h"])])])
	])

	AC_ARG_ENABLE([poc],
	[AS_HELP_STRING([--enable-poc],[enable building poc code])],,
	[ enable_poc="no" ])
	AM_CONDITIONAL([BUILD_POC], [test x$enable_poc = xyes])

	AC_ARG_ENABLE([kronosnetd],
	[AS_HELP_STRING([--enable-kronosnetd],[Kronosnetd support])],,
	[ enable_kronosnetd="no" ])
	AM_CONDITIONAL([BUILD_KRONOSNETD], [test x$enable_kronosnetd = xyes])

	AC_ARG_ENABLE([runautogen],
	[AS_HELP_STRING([--enable-runautogen],[run autogen.sh])],,
	[ enable_runautogen="no" ])
	AM_CONDITIONAL([BUILD_RUNAUTOGEN], [test x$enable_runautogen = xyes])

	override_rpm_debuginfo_option="yes"
	AC_ARG_ENABLE([rpm-debuginfo],
	[AS_HELP_STRING([--enable-rpm-debuginfo],[build debuginfo packages])],,
	[ enable_rpm_debuginfo="no", override_rpm_debuginfo_option="no" ])
	AM_CONDITIONAL([BUILD_RPM_DEBUGINFO], [test x$enable_rpm_debuginfo = xyes])
	AM_CONDITIONAL([OVERRIDE_RPM_DEBUGINFO], [test x$override_rpm_debuginfo_option = xyes])

	AC_ARG_ENABLE([libnozzle],
	[AS_HELP_STRING([--enable-libnozzle],[libnozzle support])],,
	[ enable_libnozzle="yes" ])

	if test "x$enable_kronosnetd" = xyes; then
	enable_libnozzle=yes
	fi
	AM_CONDITIONAL([BUILD_LIBNOZZLE], [test x$enable_libnozzle = xyes])

	## local helper functions
	# this function checks if CC support options passed as
	# args. Global CPPFLAGS are ignored during this test.
	cc_supports_flag() {
	saveCPPFLAGS="$CPPFLAGS"
	CPPFLAGS="$@"
	if echo $CC \| grep -q clang; then
	CPPFLAGS="-Werror $CPPFLAGS"
	fi
	AC_MSG_CHECKING([whether $CC supports "$@"])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
	[RC=0; AC_MSG_RESULT([yes])],
	[RC=1; AC_MSG_RESULT([no])])
	CPPFLAGS="$saveCPPFLAGS"
	return $RC
	}

	# Checks for libraries.
	AX_PTHREAD(,[AC_MSG_ERROR([POSIX threads support is required])])
	saved_LIBS="$LIBS"
	LIBS=
	AC_SEARCH_LIBS([ceil], [m], , [AC_MSG_ERROR([ceil not found])])
	AC_SUBST([m_LIBS], [$LIBS])
	LIBS=
	AC_SEARCH_LIBS([clock_gettime], [rt], , [AC_MSG_ERROR([clock_gettime not found])])
	AC_SUBST([rt_LIBS], [$LIBS])
	LIBS=
	AC_SEARCH_LIBS([dlopen], [dl dld], , [AC_MSG_ERROR([dlopen not found])])
	AC_SUBST([dl_LIBS], [$LIBS])
	LIBS="$saved_LIBS"

	# OS detection

	AC_MSG_CHECKING([for os in ${host_os}])
	case "$host_os" in
	linux)
	AC_DEFINE_UNQUOTED([KNET_LINUX], [1], [Compiling for Linux platform])
	AC_MSG_RESULT([Linux])
	;;
	bsd)
	AC_DEFINE_UNQUOTED([KNET_BSD], [1], [Compiling for BSD platform])
	AC_MSG_RESULT([BSD])
	;;
	*)
	AC_MSG_ERROR([Unsupported OS? hmmmm])
	;;
	esac

	# Checks for header files.
	AC_CHECK_HEADERS([sys/epoll.h])
	AC_CHECK_FUNCS([kevent])
	# if neither sys/epoll.h nor kevent are present, we should fail.

	if test "x$ac_cv_header_sys_epoll_h" = xno && test "x$ac_cv_func_kevent" = xno; then
	AC_MSG_ERROR([Both epoll and kevent unavailable on this OS])
	fi

	if test "x$ac_cv_header_sys_epoll_h" = xyes && test "x$ac_cv_func_kevent" = xyes; then
	AC_MSG_ERROR([Both epoll and kevent available on this OS, please contact the maintainers to fix the code])
	fi

	if test "x$enable_libknet_sctp" = xyes; then
	AC_CHECK_HEADERS([netinet/sctp.h],, [AC_MSG_ERROR(["missing required SCTP headers"])])
	fi

	# Checks for typedefs, structures, and compiler characteristics.
	AC_C_INLINE
	AC_TYPE_PID_T
	AC_TYPE_SIZE_T
	AC_TYPE_SSIZE_T
	AC_TYPE_UINT8_T
	AC_TYPE_UINT16_T
	AC_TYPE_UINT32_T
	AC_TYPE_UINT64_T
	AC_TYPE_INT8_T
	AC_TYPE_INT16_T
	AC_TYPE_INT32_T
	AC_TYPE_INT64_T

	if test "x$enable_man" = "xyes"; then
	AC_ARG_VAR([DOXYGEN], [override doxygen executable])
	AC_CHECK_PROGS([DOXYGEN], [doxygen], [no])
	if test "x$DOXYGEN" = xno; then
	AC_MSG_ERROR(["Doxygen command not found"])
	fi
	# required by doxyxml to build man pages dynamically
	# Don't let AC_PROC_CC (invoked by AX_PROG_CC_FOR_BUILD) replace
	# undefined CFLAGS_FOR_BUILD with -g -O2, overriding our special OPT_CFLAGS.
	: ${CFLAGS_FOR_BUILD=""}
	AX_PROG_CC_FOR_BUILD
	saved_PKG_CONFIG="$PKG_CONFIG"
	saved_ac_cv_path_PKG_CONFIG="$ac_cv_path_PKG_CONFIG"
	unset PKG_CONFIG ac_cv_path_PKG_CONFIG
	AC_PATH_PROG([PKG_CONFIG], [pkg-config])
	PKG_CHECK_MODULES([libqb_BUILD], [libqb])
	PKG_CHECK_MODULES([libxml_BUILD], [libxml-2.0])
	PKG_CONFIG="$saved_PKG_CONFIG"
	ac_cv_path_PKG_CONFIG="$saved_ac_cv_path_PKG_CONFIG"
	fi

	-# checks (for kronosnetd)
	+# checks for libnozzle
	+if test "x$enable_libnozzle" = xyes; then
	+ if `echo $host_os \| grep -q linux`; then
	+ PKG_CHECK_MODULES([libnl], [libnl-3.0])
	+ PKG_CHECK_MODULES([libnlroute], [libnl-route-3.0])
	+ fi
	+fi
	+
	+# checks for kronosnetd
	if test "x$enable_kronosnetd" = xyes; then
	AC_CHECK_HEADERS([security/pam_appl.h],
	[AC_CHECK_LIB([pam], [pam_start],
	[AC_SUBST([pam_LIBS], [-lpam])],
	[AC_MSG_ERROR([Unable to find LinuxPAM devel files])])])

	AC_CHECK_HEADERS([security/pam_misc.h],
	[AC_CHECK_LIB([pam_misc], [misc_conv],
	[AC_SUBST([pam_misc_LIBS], [-lpam_misc])],
	[AC_MSG_ERROR([Unable to find LinuxPAM MISC devel files])])])

	PKG_CHECK_MODULES([libqb], [libqb])

	AC_CHECK_LIB([qb], [qb_log_thread_priority_set],
	[have_qb_log_thread_priority_set="yes"],
	[have_qb_log_thread_priority_set="no"])
	if test "x${have_qb_log_thread_priority_set}" = xyes; then
	AC_DEFINE_UNQUOTED([HAVE_QB_LOG_THREAD_PRIORITY_SET], [1], [have qb_log_thread_priority_set])
	fi
	fi

	# local options
	AC_ARG_ENABLE([debug],
	[AS_HELP_STRING([--enable-debug],[enable debug build])])

	AC_ARG_WITH([initdefaultdir],
	[AS_HELP_STRING([--with-initdefaultdir=DIR],[path to /etc/sysconfig or /etc/default dir])],
	[ INITDEFAULTDIR="$withval" ],
	[ INITDEFAULTDIR="$sysconfdir/default" ])

	AC_ARG_WITH([initddir],
	[AS_HELP_STRING([--with-initddir=DIR],[path to init script directory])],
	[ INITDDIR="$withval" ],
	[ INITDDIR="$sysconfdir/init.d" ])

	AC_ARG_WITH([systemddir],
	[AS_HELP_STRING([--with-systemddir=DIR],[path to systemd unit files directory])],
	[ SYSTEMDDIR="$withval" ],
	[ SYSTEMDDIR="$systemddir" ])

	AC_ARG_WITH([syslogfacility],
	[AS_HELP_STRING([--with-syslogfacility=FACILITY],[default syslog facility])],
	[ SYSLOGFACILITY="$withval" ],
	[ SYSLOGFACILITY="LOG_DAEMON" ])

	AC_ARG_WITH([sysloglevel],
	[AS_HELP_STRING([--with-sysloglevel=LEVEL],[default syslog level])],
	[ SYSLOGLEVEL="$withval" ],
	[ SYSLOGLEVEL="LOG_INFO" ])

	AC_ARG_WITH([defaultadmgroup],
	[AS_HELP_STRING([--with-defaultadmgroup=GROUP],
	[define PAM group. Users part of this group will be allowed to configure
	kronosnet. Others will only receive read-only rights.])],
	[ DEFAULTADMGROUP="$withval" ],
	[ DEFAULTADMGROUP="kronosnetadm" ])

	## random vars
	LOGDIR=${localstatedir}/log/
	RUNDIR=${localstatedir}/run/
	DEFAULT_CONFIG_DIR=${sysconfdir}/kronosnet

	## do subst

	AC_SUBST([DEFAULT_CONFIG_DIR])
	AC_SUBST([INITDEFAULTDIR])
	AC_SUBST([INITDDIR])
	AC_SUBST([SYSTEMDDIR])
	AC_SUBST([LOGDIR])
	AC_SUBST([DEFAULTADMGROUP])

	AC_DEFINE_UNQUOTED([DEFAULT_CONFIG_DIR],
	["$(eval echo ${DEFAULT_CONFIG_DIR})"],
	[Default config directory])

	AC_DEFINE_UNQUOTED([DEFAULT_CONFIG_FILE],
	["$(eval echo ${DEFAULT_CONFIG_DIR}/kronosnetd.conf)"],
	[Default config file])

	AC_DEFINE_UNQUOTED([LOGDIR],
	["$(eval echo ${LOGDIR})"],
	[Default logging directory])

	AC_DEFINE_UNQUOTED([DEFAULT_LOG_FILE],
	["$(eval echo ${LOGDIR}/kronosnetd.log)"],
	[Default log file])

	AC_DEFINE_UNQUOTED([RUNDIR],
	["$(eval echo ${RUNDIR})"],
	[Default run directory])

	AC_DEFINE_UNQUOTED([SYSLOGFACILITY],
	[$(eval echo ${SYSLOGFACILITY})],
	[Default syslog facility])

	AC_DEFINE_UNQUOTED([SYSLOGLEVEL],
	[$(eval echo ${SYSLOGLEVEL})],
	[Default syslog level])

	AC_DEFINE_UNQUOTED([DEFAULTADMGROUP],
	["$(eval echo ${DEFAULTADMGROUP})"],
	[Default admin group])

	# debug build stuff
	if test "x${enable_debug}" = xyes; then
	AC_DEFINE_UNQUOTED([DEBUG], [1], [Compiling Debugging code])
	OPT_CFLAGS="-O0"
	else
	OPT_CFLAGS="-O3"
	fi

	# gdb flags
	if test "x${GCC}" = xyes; then
	GDB_FLAGS="-ggdb3"
	else
	GDB_FLAGS="-g"
	fi

	# extra warnings
	EXTRA_WARNINGS=""

	WARNLIST="
	all
	extra
	unused
	shadow
	missing-prototypes
	missing-declarations
	suggest-attribute=noreturn
	suggest-attribute=format
	property-attribute-mismatch
	strict-prototypes
	declaration-after-statement
	pointer-arith
	write-strings
	cast-align
	bad-function-cast
	missing-format-attribute
	float-equal
	format=2
	format-signedness
	format-security
	format-nonliteral
	no-long-long
	unsigned-char
	gnu89-inline
	no-strict-aliasing
	error
	address
	cpp
	overflow
	parentheses
	sequence-point
	switch
	shift-overflow
	shift-overflow=2
	overlength-strings
	retundent-decls
	init-self
	uninitialized
	unused-but-set-variable
	unused-const-variable
	unused-function
	unused-result
	unused-value
	unused-variable
	unknown-pragmas
	no-unused-parameter
	"

	for j in $WARNLIST; do
	if cc_supports_flag -W$j; then
	EXTRA_WARNINGS="$EXTRA_WARNINGS -W$j";
	fi
	done

	AC_SUBST([AM_CFLAGS],["$OPT_CFLAGS $GDB_FLAGS $EXTRA_WARNINGS"])

	AX_PROG_DATE
	AS_IF([test "$ax_cv_prog_date_gnu_date:$ax_cv_prog_date_gnu_utc" = yes:yes],
	[UTC_DATE_AT="date -u -d@"],
	[AS_IF([test "x$ax_cv_prog_date_bsd_date" = xyes],
	[UTC_DATE_AT="date -u -r"],
	[AC_MSG_ERROR([date utility unable to convert epoch to UTC])])])
	AC_SUBST([UTC_DATE_AT])

	AC_ARG_VAR([SOURCE_EPOCH],[last modification date of the source])
	AC_MSG_NOTICE([trying to determine source epoch])
	AC_MSG_CHECKING([for source epoch in \$SOURCE_EPOCH])
	AS_IF([test -n "$SOURCE_EPOCH"],
	[AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])
	AC_MSG_CHECKING([for source epoch in source_epoch file])
	AS_IF([test -e "$srcdir/source_epoch"],
	[read SOURCE_EPOCH <"$srcdir/source_epoch"
	AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])
	AC_MSG_CHECKING([for source epoch baked in by gitattributes export-subst])
	SOURCE_EPOCH='$Format:%at$' # template for rewriting by git-archive
	AS_CASE([$SOURCE_EPOCH],
	[?Format:*], # was not rewritten
	[AC_MSG_RESULT([no])
	AC_MSG_CHECKING([for source epoch in \$SOURCE_DATE_EPOCH])
	AS_IF([test "x$SOURCE_DATE_EPOCH" != x],
	[SOURCE_EPOCH="$SOURCE_DATE_EPOCH"
	AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no])
	AC_MSG_CHECKING([whether git log can provide a source epoch])
	SOURCE_EPOCH=f${SOURCE_EPOCH#\$F} # convert into git log --pretty format
	SOURCE_EPOCH=$(cd "$srcdir" && git log -1 --pretty=${SOURCE_EPOCH%$} 2>/dev/null)
	AS_IF([test -n "$SOURCE_EPOCH"],
	[AC_MSG_RESULT([yes])],
	[AC_MSG_RESULT([no, using current time and breaking reproducibility])
	SOURCE_EPOCH=$(date +%s)])])],
	[AC_MSG_RESULT([yes])]
	)])
	])
	AC_MSG_NOTICE([using source epoch $($UTC_DATE_AT$SOURCE_EPOCH +'%F %T %Z')])

	AC_CONFIG_FILES([
	Makefile
	init/Makefile
	libnozzle/Makefile
	libnozzle/libnozzle.pc
	libnozzle/tests/Makefile
	kronosnetd/Makefile
	kronosnetd/kronosnetd.logrotate
	libknet/Makefile
	libknet/libknet.pc
	libknet/tests/Makefile
	man/Makefile
	man/Doxyfile-knet
	man/Doxyfile-nozzle
	poc-code/Makefile
	poc-code/iov-hash/Makefile
	poc-code/access-list/Makefile
	])

	if test "x$VERSION" = "xUNKNOWN"; then
	AC_MSG_ERROR([m4_text_wrap([
	configure was unable to determine the source tree's current version. This
	generally happens when using git archive (or the github download button)
	generated tarball/zip file. In order to workaround this issue, either use git
	clone https://github.com/kronosnet/kronosnet.git or use an official release
	tarball, available at https://kronosnet.org/releases/. Alternatively you
	can add a compatible version in a .tarball-version file at the top of the
	source tree, wipe your autom4te.cache dir and generated configure, and rerun
	autogen.sh.
	], [ ], [ ], [76])])
	fi

	AC_OUTPUT
	diff --git a/kronosnet.spec.in b/kronosnet.spec.in
	index d07103b4..9e9903aa 100644
	--- a/kronosnet.spec.in
	+++ b/kronosnet.spec.in
	@@ -1,537 +1,540 @@
	###############################################################################
	###############################################################################
	##
	## Copyright (C) 2012-2018 Red Hat, Inc. All rights reserved.
	##
	## This copyrighted material is made available to anyone wishing to use,
	## modify, copy, or redistribute it subject to the terms and conditions
	## of the GNU General Public License v.2 or higher
	##
	###############################################################################
	###############################################################################

	# keep around ready for later user
	%global alphatag @alphatag@
	%global numcomm @numcomm@
	%global dirty @dirty@

	# set defaults from ./configure invokation
	%@sctp@ sctp
	%@nss@ nss
	%@openssl@ openssl
	%@zlib@ zlib
	%@lz4@ lz4
	%@lzo2@ lzo2
	%@lzma@ lzma
	%@bzip2@ bzip2
	%@kronosnetd@ kronosnetd
	%@libnozzle@ libnozzle
	%@runautogen@ runautogen
	%@rpmdebuginfo@ rpmdebuginfo
	%@overriderpmdebuginfo@ overriderpmdebuginfo
	%@buildman@ buildman

	%if %{with overriderpmdebuginfo}
	%undefine _enable_debug_packages
	%endif

	%if %{with sctp}
	%global buildsctp 1
	%endif
	%if %{with nss}
	%global buildcryptonss 1
	%endif
	%if %{with openssl}
	%global buildcryptoopenssl 1
	%endif
	%if %{with zlib}
	%global buildcompresszlib 1
	%endif
	%if %{with lz4}
	%global buildcompresslz4 1
	%endif
	%if %{with lzo2}
	%global buildcompresslzo2 1
	%endif
	%if %{with lzma}
	%global buildcompresslzma 1
	%endif
	%if %{with bzip2}
	%global buildcompressbzip2 1
	%endif
	%if %{with libnozzle}
	%global buildlibnozzle 1
	%endif
	%if %{with kronosnetd}
	%global buildlibnozzle 1
	%global buildkronosnetd 1
	%endif
	%if %{with runautogen}
	%global buildautogen 1
	%endif
	%if %{with buildman}
	%global buildmanpages 1
	%endif

	# main (empty) package
	# http://www.rpm.org/max-rpm/s1-rpm-subpack-spec-file-changes.html

	Name: kronosnet
	Summary: Multipoint-to-Multipoint VPN daemon
	Version: @version@
	Release: 1%{?numcomm:.%{numcomm}}%{?alphatag:.%{alphatag}}%{?dirty:.%{dirty}}%{?dist}
	License: GPLv2+ and LGPLv2+
	Group: System Environment/Base
	URL: https://github.com/kronosnet/kronosnet/
	Source0: https://github.com/kronosnet/kronosnet/archive/%{name}-%{version}%{?numcomm:.%{numcomm}}%{?alphatag:-%{alphatag}}%{?dirty:-%{dirty}}.tar.gz

	## Setup/build bits

	BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)

	# Build dependencies
	BuildRequires: gcc
	# required to build man pages
	%if %{defined buildmanpages}
	BuildRequires: libqb-devel libxml2-devel doxygen
	%endif
	%if %{defined buildsctp}
	BuildRequires: lksctp-tools-devel
	%endif
	%if %{defined buildcryptonss}
	BuildRequires: /usr/include/nss3/nss.h /usr/include/nspr4/nspr.h
	%endif
	%if %{defined buildcryptoopenssl}
	BuildRequires: /usr/include/openssl/conf.h
	%endif
	%if %{defined buildcompresszlib}
	BuildRequires: zlib-devel
	%endif
	%if %{defined buildcompresslz4}
	BuildRequires: /usr/include/lz4hc.h
	%endif
	%if %{defined buildcompresslzo2}
	BuildRequires: lzo-devel
	%endif
	%if %{defined buildcompresslzma}
	BuildRequires: xz-devel
	%endif
	%if %{defined buildcompressbzip2}
	BuildRequires: /usr/include/bzlib.h
	%endif
	%if %{defined buildkronosnetd}
	BuildRequires: pam-devel
	%endif
	+%if %{defined buildlibnozzle}
	+BuildRequires: libnl3-devel
	+%endif
	%if %{defined buildautogen}
	BuildRequires: autoconf
	BuildRequires: automake
	BuildRequires: libtool
	%endif

	%prep
	%setup -q -n %{name}-%{version}%{?numcomm:.%{numcomm}}%{?alphatag:-%{alphatag}}%{?dirty:-%{dirty}}

	%build
	%if %{with runautogen}
	./autogen.sh
	%endif

	%{configure} \
	%if %{defined buildmanpages}
	--enable-man \
	%else
	--disable-man \
	%endif
	%if %{defined buildsctp}
	--enable-libknet-sctp \
	%else
	--disable-libknet-sctp \
	%endif
	%if %{defined buildcryptonss}
	--enable-crypto-nss \
	%else
	--disable-crypto-nss \
	%endif
	%if %{defined buildcryptoopenssl}
	--enable-crypto-openssl \
	%else
	--disable-crypto-openssl \
	%endif
	%if %{defined buildcompresszlib}
	--enable-compress-zlib \
	%else
	--disable-compress-zlib \
	%endif
	%if %{defined buildcompresslz4}
	--enable-compress-lz4 \
	%else
	--disable-compress-lz4 \
	%endif
	%if %{defined buildcompresslzo2}
	--enable-compress-lzo2 \
	%else
	--disable-compress-lzo2 \
	%endif
	%if %{defined buildcompresslzma}
	--enable-compress-lzma \
	%else
	--disable-compress-lzma \
	%endif
	%if %{defined buildcompressbzip2}
	--enable-compress-bzip2 \
	%else
	--disable-compress-bzip2 \
	%endif
	%if %{defined buildkronosnetd}
	--enable-kronosnetd \
	%endif
	%if %{defined buildlibnozzle}
	--enable-libnozzle \
	%endif
	--with-initdefaultdir=%{_sysconfdir}/sysconfig/ \
	%if %{defined _unitdir}
	--with-systemddir=%{_unitdir}
	%else
	--with-initddir=%{_sysconfdir}/rc.d/init.d/
	%endif

	make %{_smp_mflags}

	%install
	rm -rf %{buildroot}
	make install DESTDIR=%{buildroot}

	# tree cleanup
	# remove static libraries
	find %{buildroot} -name "*.a" -exec rm {} \;
	# remove libtools leftovers
	find %{buildroot} -name "*.la" -exec rm {} \;

	# handle systemd vs init script
	%if %{defined _unitdir}
	# remove init scripts
	rm -rf %{buildroot}/etc/init.d
	%else
	# remove systemd specific bits
	find %{buildroot} -name "*.service" -exec rm {} \;
	%endif

	# remove docs
	rm -rf %{buildroot}/usr/share/doc/kronosnet

	%clean
	rm -rf %{buildroot}

	# main empty package
	%description
	kronosnet source

	%if %{defined buildkronosnetd}
	## Runtime and subpackages section
	%package -n kronosnetd
	Group: System Environment/Base
	Summary: Multipoint-to-Multipoint VPN daemon
	%if %{defined _unitdir}
	# Needed for systemd unit
	Requires(post): systemd-sysv
	Requires(post): systemd-units
	Requires(preun): systemd-units
	Requires(postun): systemd-units
	%else
	Requires(post): chkconfig
	Requires(preun): chkconfig, initscripts
	%endif
	Requires(post): shadow-utils
	Requires(preun): shadow-utils
	Requires: pam, /etc/pam.d/passwd

	%description -n kronosnetd
	The kronosnet daemon is a bridge between kronosnet switching engine
	and kernel network tap devices, to create and administer a
	distributed LAN over multipoint-to-multipoint VPNs.
	The daemon does a poor attempt to provide a configure UI similar
	to other known network devices/tools (Cisco, quagga).
	Beside looking horrific, it allows runtime changes and
	reconfiguration of the kronosnet(s) without daemon reload
	or service disruption.

	%post -n kronosnetd
	%if %{defined _unitdir}
	%if 0%{?systemd_post:1}
	%systemd_post kronosnetd.service
	%else
	/bin/systemctl daemon-reload >/dev/null 2>&1 \|\| :
	%endif
	%else
	/sbin/chkconfig --add kronosnetd
	%endif
	/usr/sbin/groupadd --force --system @defaultadmgroup@

	%preun -n kronosnetd
	%if %{defined _unitdir}
	%if 0%{?systemd_preun:1}
	%systemd_preun kronosnetd.service
	%else
	if [ "$1" -eq 0 ]; then
	/bin/systemctl --no-reload disable kronosnetd.service
	/bin/systemctl stop kronosnetd.service >/dev/null 2>&1
	fi
	%endif
	%else
	if [ "$1" = 0 ]; then
	/sbin/service kronosnetd stop >/dev/null 2>&1
	/sbin/chkconfig --del kronosnetd
	fi
	%endif

	%files -n kronosnetd
	%defattr(-,root,root,-)
	%doc COPYING.* COPYRIGHT
	%dir %{_sysconfdir}/kronosnet
	%dir %{_sysconfdir}/kronosnet/*
	%config(noreplace) %{_sysconfdir}/sysconfig/kronosnetd
	%config(noreplace) %{_sysconfdir}/pam.d/kronosnetd
	%config(noreplace) %{_sysconfdir}/logrotate.d/kronosnetd
	%if %{defined _unitdir}
	%{_unitdir}/kronosnetd.service
	%else
	%config(noreplace) %{_sysconfdir}/rc.d/init.d/kronosnetd
	%endif
	%{_sbindir}/*
	%{_mandir}/man8/*
	%endif

	%if %{defined buildlibnozzle}
	%package -n libnozzle1
	Group: System Environment/Libraries
	Summary: Simple userland wrapper around kernel tap devices

	%description -n libnozzle1
	This is an over-engineered commodity library to manage a pool
	of tap devices and provides the basic
	pre-up.d/up.d/down.d/post-down.d infrastructure.

	%files -n libnozzle1
	%defattr(-,root,root,-)
	%doc COPYING.* COPYRIGHT
	%{_libdir}/libnozzle.so.*

	%post -n libnozzle1 -p /sbin/ldconfig

	%postun -n libnozzle1 -p /sbin/ldconfig

	%package -n libnozzle1-devel
	Group: Development/Libraries
	Summary: Simple userland wrapper around kernel tap devices (developer files)
	Requires: libnozzle1 = %{version}-%{release}
	Requires: pkgconfig

	%description -n libnozzle1-devel
	This is an over-engineered commodity library to manage a pool
	of tap devices and provides the basic
	pre-up.d/up.d/down.d/post-down.d infrastructure.

	%files -n libnozzle1-devel
	%defattr(-,root,root,-)
	%doc COPYING.* COPYRIGHT
	%{_libdir}/libnozzle.so
	%{_includedir}/libnozzle.h
	%{_libdir}/pkgconfig/libnozzle.pc
	%endif

	%package -n libknet1
	Group: System Environment/Libraries
	Summary: Kronosnet core switching implementation

	%description -n libknet1
	The whole kronosnet core is implemented in this library.
	Please refer to the not-yet-existing documentation for further
	information.

	%files -n libknet1
	%defattr(-,root,root,-)
	%doc COPYING.* COPYRIGHT
	%{_libdir}/libknet.so.*
	%dir %{_libdir}/kronosnet

	%post -n libknet1 -p /sbin/ldconfig

	%postun -n libknet1 -p /sbin/ldconfig

	%package -n libknet1-devel
	Group: Development/Libraries
	Summary: Kronosnet core switching implementation (developer files)
	Requires: libknet1 = %{version}-%{release}
	Requires: pkgconfig

	%description -n libknet1-devel
	The whole kronosnet core is implemented in this library.
	Please refer to the not-yet-existing documentation for further
	information.

	%files -n libknet1-devel
	%defattr(-,root,root,-)
	%doc COPYING.* COPYRIGHT
	%{_libdir}/libknet.so
	%{_includedir}/libknet.h
	%{_libdir}/pkgconfig/libknet.pc
	%if %{defined buildmanpages}
	%{_mandir}/man3/knet*.3.gz
	%endif

	%if %{defined buildcryptonss}
	%package -n libknet1-crypto-nss-plugin
	Group: System Environment/Libraries
	Summary: libknet1 nss support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-crypto-nss-plugin
	NSS crypto support for libknet1.

	%files -n libknet1-crypto-nss-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/crypto_nss.so
	%endif

	%if %{defined buildcryptoopenssl}
	%package -n libknet1-crypto-openssl-plugin
	Group: System Environment/Libraries
	Summary: libknet1 openssl support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-crypto-openssl-plugin
	OpenSSL crypto support for libknet1.

	%files -n libknet1-crypto-openssl-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/crypto_openssl.so
	%endif

	%if %{defined buildcompresszlib}
	%package -n libknet1-compress-zlib-plugin
	Group: System Environment/Libraries
	Summary: libknet1 zlib support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-compress-zlib-plugin
	zlib compression support for libknet1.

	%files -n libknet1-compress-zlib-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/compress_zlib.so
	%endif
	%if %{defined buildcompresslz4}
	%package -n libknet1-compress-lz4-plugin
	Group: System Environment/Libraries
	Summary: libknet1 lz4 and lz4hc support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-compress-lz4-plugin
	lz4 and lz4hc compression support for libknet1.

	%files -n libknet1-compress-lz4-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/compress_lz4.so
	%{_libdir}/kronosnet/compress_lz4hc.so
	%endif

	%if %{defined buildcompresslzo2}
	%package -n libknet1-compress-lzo2-plugin
	Group: System Environment/Libraries
	Summary: libknet1 lzo2 support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-compress-lzo2-plugin
	lzo2 compression support for libknet1.

	%files -n libknet1-compress-lzo2-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/compress_lzo2.so
	%endif

	%if %{defined buildcompresslzma}
	%package -n libknet1-compress-lzma-plugin
	Group: System Environment/Libraries
	Summary: libknet1 lzma support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-compress-lzma-plugin
	lzma compression support for libknet1.

	%files -n libknet1-compress-lzma-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/compress_lzma.so
	%endif

	%if %{defined buildcompressbzip2}
	%package -n libknet1-compress-bzip2-plugin
	Group: System Environment/Libraries
	Summary: libknet1 bzip2 support
	Requires: libknet1 = %{version}-%{release}

	%description -n libknet1-compress-bzip2-plugin
	bzip2 compression support for libknet1.

	%files -n libknet1-compress-bzip2-plugin
	%defattr(-,root,root,-)
	%{_libdir}/kronosnet/compress_bzip2.so
	%endif

	%package -n libknet1-crypto-plugins-all
	Group: System Environment/Libraries
	Summary: libknet1 crypto plugins meta package
	%if %{defined buildcryptonss}
	Requires: libknet1-crypto-nss-plugin
	%endif
	%if %{defined buildcryptoopenssl}
	Requires: libknet1-crypto-openssl-plugin
	%endif

	%description -n libknet1-crypto-plugins-all
	meta package to install all of libknet1 crypto plugins

	%files -n libknet1-crypto-plugins-all

	%package -n libknet1-compress-plugins-all
	Group: System Environment/Libraries
	Summary: libknet1 compress plugins meta package
	%if %{defined buildcompresszlib}
	Requires: libknet1-compress-zlib-plugin
	%endif
	%if %{defined buildcompresslz4}
	Requires: libknet1-compress-lz4-plugin
	%endif
	%if %{defined buildcompresslzo2}
	Requires: libknet1-compress-lzo2-plugin
	%endif
	%if %{defined buildcompresslzma}
	Requires: libknet1-compress-lzma-plugin
	%endif
	%if %{defined buildcompressbzip2}
	Requires: libknet1-compress-bzip2-plugin
	%endif

	%description -n libknet1-compress-plugins-all
	meta package to install all of libknet1 compress plugins

	%files -n libknet1-compress-plugins-all

	%package -n libknet1-plugins-all
	Group: System Environment/Libraries
	Summary: libknet1 plugins meta package
	Requires: libknet1-compress-plugins-all
	Requires: libknet1-crypto-plugins-all

	%description -n libknet1-plugins-all
	meta package to install all of libknet1 plugins

	%files -n libknet1-plugins-all

	%if %{with rpmdebuginfo}
	%debug_package
	%endif

	%changelog
	* @date@ Autotools generated version <nobody@nowhere.org> - @version@-1-@numcomm@.@alphatag@.@dirty@
	- These aren't the droids you're looking for.

	diff --git a/libnozzle/Makefile.am b/libnozzle/Makefile.am
	index 4982d94b..3a49d23b 100644
	--- a/libnozzle/Makefile.am
	+++ b/libnozzle/Makefile.am
	@@ -1,49 +1,49 @@
	#
	# Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
	#
	# Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
	#
	# This software licensed under GPL-2.0+, LGPL-2.0+
	#

	MAINTAINERCLEANFILES = Makefile.in

	include $(top_srcdir)/build-aux/check.mk

	SYMFILE = libnozzle_exported_syms

	EXTRA_DIST = $(SYMFILE)

	if BUILD_LIBNOZZLE

	SUBDIRS = . tests

	libversion = 1:0:0

	sources = libnozzle.c \
	internals.c

	include_HEADERS = libnozzle.h

	pkgconfigdir = $(libdir)/pkgconfig

	pkgconfig_DATA = libnozzle.pc

	noinst_HEADERS = \
	internals.h

	lib_LTLIBRARIES = libnozzle.la

	libnozzle_la_SOURCES = $(sources)

	-libnozzle_la_CFLAGS = $(AM_CFLAGS) $(PTHREAD_CFLAGS)
	+libnozzle_la_CFLAGS = $(AM_CFLAGS) $(PTHREAD_CFLAGS) $(libnl_CFLAGS) $(libnlroute_CFLAGS)

	EXTRA_libnozzle_la_DEPENDENCIES = $(SYMFILE)

	libnozzle_la_LDFLAGS = $(AM_LDFLAGS) \
	-Wl,-version-script,$(srcdir)/$(SYMFILE) \
	-version-info $(libversion)

	-libnozzle_la_LIBADD = $(PTHREAD_LIBS)
	+libnozzle_la_LIBADD = $(PTHREAD_LIBS) $(libnl_LIBS) $(libnlroute_LIBS)

	endif
	diff --git a/libnozzle/internals.h b/libnozzle/internals.h
	index c41cd3de..c05d56de 100644
	--- a/libnozzle/internals.h
	+++ b/libnozzle/internals.h
	@@ -1,71 +1,78 @@
	/*
	* Copyright (C) 2010-2017 Red Hat, Inc. All rights reserved.
	*
	* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
	*
	* This software licensed under GPL-2.0+, LGPL-2.0+
	*/

	#ifndef __NOZZLE_INTERNALS_H__
	#define __NOZZLE_INTERNALS_H__

	#include "config.h"
	+
	+#ifdef KNET_LINUX
	+#include <netlink/netlink.h>
	+#endif
	#include <net/if.h>

	struct nozzle_lib_config {
	struct nozzle_iface *head;
	int ioctlfd;
	+#ifdef KNET_LINUX
	+ struct nl_sock *nlsock;
	+#endif
	};

	#define IPADDR_CHAR_MAX 128
	#define PREFIX_CHAR_MAX 4

	struct nozzle_ip {
	char ipaddr[IPADDR_CHAR_MAX + 1];
	char prefix[PREFIX_CHAR_MAX + 1];
	int domain; /* AF_INET or AF_INET6 */
	struct nozzle_ip *next;
	};

	#define MACADDR_CHAR_MAX 18

	/*
	* 11 = post-down.d
	* 1 = /
	*/
	#define UPDOWN_PATH_MAX PATH_MAX - 11 - 1 - IFNAMSIZ

	struct nozzle_iface {
	char name[IFNAMSIZ]; /* interface name */
	int fd; /* interface fd */
	int up; /* interface status 0 is down, 1 is up */
	/*
	* extra data
	*/
	struct nozzle_ip ip; / configured ip addresses */

	/*
	* default MAC address assigned by the kernel at creation time
	*/
	char default_mac[MACADDR_CHAR_MAX + 1];

	int default_mtu; /* MTU assigned by the kernel at creation time */
	int current_mtu; /* MTU configured by libnozzle user */

	int hasupdown; /* interface has up/down path to scripts configured */
	char updownpath[UPDOWN_PATH_MAX]; /* path to up/down scripts if configured */

	struct nozzle_iface *next;
	};

	#define ifname ifr.ifr_name

	int execute_bin_sh_command(const char command, char *error_string);

	int find_ip(nozzle_t nozzle,
	const char ipaddr, const char prefix,
	struct nozzle_ip ip, struct nozzle_ip ip_prev);

	char generate_v4_broadcast(const char ipaddr, const char *prefix);

	#endif
	diff --git a/libnozzle/libnozzle.c b/libnozzle/libnozzle.c
	index 4548f60b..f190e9af 100644
	--- a/libnozzle/libnozzle.c
	+++ b/libnozzle/libnozzle.c
	@@ -1,1134 +1,1230 @@
	/*
	* Copyright (C) 2010-2018 Red Hat, Inc. All rights reserved.
	*
	* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
	*
	* This software licensed under GPL-2.0+, LGPL-2.0+
	*/

	#include "config.h"

	#include <errno.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <sys/socket.h>
	#include <sys/wait.h>
	#include <fcntl.h>
	#include <unistd.h>
	#include <sys/ioctl.h>
	#include <net/ethernet.h>
	#include <pthread.h>
	#include <limits.h>
	#include <stdio.h>
	#include <net/if.h>
	#include <ifaddrs.h>
	#include <stdint.h>

	#ifdef KNET_LINUX
	#include <linux/if_tun.h>
	#include <netinet/ether.h>
	+#include <netlink/netlink.h>
	+#include <netlink/route/addr.h>
	+#include <netlink/route/link.h>
	#endif
	#ifdef KNET_BSD
	#include <net/if_dl.h>
	#endif

	#include "libnozzle.h"
	#include "internals.h"

	/*
	* internal functions are all _unlocked_
	* locking should be handled at external API functions
	*/
	static int lib_init = 0;
	static struct nozzle_lib_config lib_cfg;
	static pthread_mutex_t config_mutex = PTHREAD_MUTEX_INITIALIZER;

	/*
	* internal helpers
	*/

	-static int _set_ip(nozzle_t nozzle, const char *command,
	+#define IP_ADD 1
	+#define IP_DEL 2
	+
	+static int _set_ip(nozzle_t nozzle, int command,
	const char ipaddr, const char prefix,
	char **error_string, int secondary)
	{
	+ int fam;
	char *broadcast = NULL;
	- char cmdline[4096];
	+#ifdef KNET_LINUX
	+ struct rtnl_addr *addr = NULL;
	+ struct nl_addr *local_addr = NULL;
	+ struct nl_addr *bcast_addr = NULL;
	+ struct nl_cache *cache = NULL;
	+ int ifindex;
	+ int err = 0;
	+#endif
	#ifdef KNET_BSD
	+ char cmdline[4096];
	char proto[6];
	- int v4 = 1;
	-
	- snprintf(proto, sizeof(proto), "inet");
	#endif

	if (!strchr(ipaddr, ':')) {
	+ fam = AF_INET;
	broadcast = generate_v4_broadcast(ipaddr, prefix);
	if (!broadcast) {
	errno = EINVAL;
	return -1;
	}
	+ } else {
	+ fam = AF_INET6;
	}
	-#ifdef KNET_BSD
	- else {
	- v4 = 0;
	- snprintf(proto, sizeof(proto), "inet6");
	+
	+#ifdef KNET_LINUX
	+ addr = rtnl_addr_alloc();
	+ if (!addr) {
	+ errno = ENOMEM;
	+ return -1;
	}
	-#endif

	- memset(cmdline, 0, sizeof(cmdline));
	+ if (rtnl_link_alloc_cache(lib_cfg.nlsock, AF_UNSPEC, &cache) < 0) {
	+ errno = ENOMEM;
	+ err = -1;
	+ goto out;
	+ }
	+
	+ ifindex = rtnl_link_name2i(cache, nozzle->name);
	+ if (ifindex == 0) {
	+ errno = ENOENT;
	+ err = -1;
	+ goto out;
	+ }
	+
	+ rtnl_addr_set_ifindex(addr, ifindex);
	+
	+ if (nl_addr_parse(ipaddr, fam, &local_addr) < 0) {
	+ errno = EINVAL;
	+ err = -1;
	+ goto out;
	+ }
	+
	+ if (rtnl_addr_set_local(addr, local_addr) < 0) {
	+ errno = EINVAL;
	+ err = -1;
	+ goto out;
	+ }

	-#ifdef KNET_LINUX
	if (broadcast) {
	- snprintf(cmdline, sizeof(cmdline)-1,
	- "ip addr %s %s/%s dev %s broadcast %s",
	- command, ipaddr, prefix,
	- nozzle->name, broadcast);
	+ if (nl_addr_parse(broadcast, fam, &bcast_addr) < 0) {
	+ errno = EINVAL;
	+ err = -1;
	+ goto out;
	+ }
	+
	+ if (rtnl_addr_set_broadcast(addr, bcast_addr) < 0) {
	+ errno = EINVAL;
	+ err = -1;
	+ goto out;
	+ }
	+ }
	+
	+ rtnl_addr_set_prefixlen(addr, atoi(prefix));
	+
	+ if (command == IP_ADD) {
	+ if (rtnl_addr_add(lib_cfg.nlsock, addr, 0) < 0) {
	+ errno = EINVAL;
	+ err = -1;
	+ goto out;
	+ }
	} else {
	- snprintf(cmdline, sizeof(cmdline)-1,
	- "ip addr %s %s/%s dev %s",
	- command, ipaddr, prefix,
	- nozzle->name);
	+ if (rtnl_addr_delete(lib_cfg.nlsock, addr, 0) < 0) {
	+ errno = EINVAL;
	+ err = -1;
	+ goto out;
	+ }
	+ }
	+out:
	+ if (addr) {
	+ rtnl_addr_put(addr);
	+ }
	+ if (local_addr) {
	+ nl_addr_put(local_addr);
	+ }
	+ if (bcast_addr) {
	+ nl_addr_put(bcast_addr);
	+ }
	+ if (cache) {
	+ nl_cache_put(cache);
	+ }
	+ if (broadcast) {
	+ free(broadcast);
	}
	+ return err;
	#endif
	#ifdef KNET_BSD
	- if (!strcmp(command, "add")) {
	+ memset(cmdline, 0, sizeof(cmdline));
	+
	+ if (fam == AF_INET) {
	+ snprintf(proto, sizeof(proto), "inet");
	+ } else {
	+ snprintf(proto, sizeof(proto), "inet6");
	+ }
	+
	+ if (command == IP_ADD) {
	snprintf(cmdline, sizeof(cmdline)-1,
	"ifconfig %s %s %s/%s",
	nozzle->name, proto, ipaddr, prefix);
	if (broadcast) {
	snprintf(cmdline + strlen(cmdline),
	sizeof(cmdline) - strlen(cmdline) -1,
	" broadcast %s", broadcast);
	}
	- if ((secondary) && (v4)) {
	+ if ((secondary) && (fam == AF_INET)) {
	snprintf(cmdline + strlen(cmdline),
	sizeof(cmdline) - strlen(cmdline) -1,
	" alias");
	}
	} else {
	snprintf(cmdline, sizeof(cmdline)-1,
	"ifconfig %s %s %s/%s delete",
	nozzle->name, proto, ipaddr, prefix);
	}
	-#endif
	if (broadcast) {
	free(broadcast);
	}
	return execute_bin_sh_command(cmdline, error_string);
	+#endif
	}

	/*
	* internal helpers below should be completed
	*
	* keep all ioctl work within this file
	*/

	static void lib_fini(void)
	{
	if (lib_cfg.head == NULL) {
	+#ifdef KNET_LINUX
	+ nl_close(lib_cfg.nlsock);
	+ nl_socket_free(lib_cfg.nlsock);
	+#endif
	close(lib_cfg.ioctlfd);
	lib_init = 0;
	}
	}

	static void destroy_iface(nozzle_t nozzle)
	{
	#ifdef KNET_BSD
	struct ifreq ifr;
	#endif

	if (!nozzle)
	return;

	if (nozzle->fd)
	close(nozzle->fd);

	#ifdef KNET_BSD
	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);

	ioctl(lib_cfg.ioctlfd, SIOCIFDESTROY, &ifr);
	#endif

	free(nozzle);

	lib_fini();

	return;
	}

	static int is_valid_nozzle(const nozzle_t nozzle)
	{
	nozzle_t temp;

	if (!nozzle) {
	return 0;
	}

	if (!lib_init) {
	return 0;
	}

	temp = lib_cfg.head;

	while (temp != NULL) {
	if (nozzle == temp)
	return 1;

	temp = temp->next;
	}

	return 0;
	}

	static int get_iface_mtu(const nozzle_t nozzle)
	{
	int err = 0, savederrno = 0;
	struct ifreq ifr;

	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);

	err = ioctl(lib_cfg.ioctlfd, SIOCGIFMTU, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	err = ifr.ifr_mtu;

	out_clean:
	errno = savederrno;
	return err;
	}

	static int get_iface_mac(const nozzle_t nozzle, char **ether_addr)
	{
	int err = 0, savederrno = 0;
	struct ifreq ifr;
	char mac[MACADDR_CHAR_MAX];
	#ifdef KNET_BSD
	struct ifaddrs *ifap = NULL;
	struct ifaddrs *ifa;
	int found = 0;
	#endif

	memset(&mac, 0, MACADDR_CHAR_MAX);
	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);

	#ifdef KNET_LINUX
	err = ioctl(lib_cfg.ioctlfd, SIOCGIFHWADDR, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	ether_ntoa_r((struct ether_addr *)ifr.ifr_hwaddr.sa_data, mac);
	#endif
	#ifdef KNET_BSD
	/*
	* there is no ioctl to get the ether address of an interface on FreeBSD
	* (not to be confused with hwaddr). Use workaround described here:
	* https://lists.freebsd.org/pipermail/freebsd-hackers/2004-June/007394.html
	*/
	err = getifaddrs(&ifap);
	if (err < 0) {
	savederrno = errno;
	goto out_clean;
	}

	ifa = ifap;

	while (ifa) {
	if (!strncmp(nozzle->name, ifa->ifa_name, IFNAMSIZ)) {
	found = 1;
	break;
	}
	ifa=ifa->ifa_next;
	}

	if (found) {
	ether_ntoa_r((struct ether_addr )LLADDR((struct sockaddr_dl )ifa->ifa_addr), mac);
	} else {
	errno = EINVAL;
	err = -1;
	}

	freeifaddrs(ifap);

	if (err) {
	goto out_clean;
	}

	#endif
	*ether_addr = strdup(mac);
	if (!*ether_addr) {
	savederrno = errno;
	err = -1;
	}

	out_clean:
	errno = savederrno;
	return err;
	}

	static int set_iface_down(nozzle_t nozzle)
	{
	int err = 0, savederrno = 0;
	struct ifreq ifr;

	if (!nozzle->up) {
	goto out_clean;
	}

	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);

	err = ioctl(lib_cfg.ioctlfd, SIOCGIFFLAGS, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	ifr.ifr_flags &= ~IFF_UP;

	err = ioctl(lib_cfg.ioctlfd, SIOCSIFFLAGS, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	nozzle->up = 0;

	out_clean:
	errno = savederrno;
	return err;
	}

	/*
	* public API
	*/

	int nozzle_set_mtu(nozzle_t nozzle, const int mtu, char **error_string)
	{
	int err = 0, savederrno = 0;
	struct nozzle_ip *tmp_ip;
	struct ifreq ifr;

	if ((!mtu) \|\| (!error_string)) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	err = nozzle->current_mtu = get_iface_mtu(nozzle);
	if (err < 0) {
	savederrno = errno;
	goto out_clean;
	}

	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);
	ifr.ifr_mtu = mtu;

	err = ioctl(lib_cfg.ioctlfd, SIOCSIFMTU, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	if ((nozzle->current_mtu < 1280) && (mtu >= 1280)) {
	tmp_ip = nozzle->ip;
	while(tmp_ip) {
	if (tmp_ip->domain == AF_INET6) {
	- err = _set_ip(nozzle, "add", tmp_ip->ipaddr, tmp_ip->prefix, error_string, 0);
	+ err = _set_ip(nozzle, IP_ADD, tmp_ip->ipaddr, tmp_ip->prefix, error_string, 0);
	if (err) {
	savederrno = errno;
	err = -1;
	goto out_clean;
	}
	}
	tmp_ip = tmp_ip->next;
	}
	}

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_reset_mtu(nozzle_t nozzle, char **error_string)
	{
	return nozzle_set_mtu(nozzle, nozzle->default_mtu, error_string);
	}

	int nozzle_add_ip(nozzle_t nozzle, const char ipaddr, const char prefix, char **error_string)
	{
	int err = 0, savederrno = 0;
	int found = 0;
	struct nozzle_ip ip = NULL, ip_prev = NULL, *ip_last = NULL;
	int secondary = 0;

	if ((!ipaddr) \|\| (!prefix) \|\| (!error_string)) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	found = find_ip(nozzle, ipaddr, prefix, &ip, &ip_prev);
	if (found) {
	goto out_clean;
	}

	ip = malloc(sizeof(struct nozzle_ip));
	if (!ip) {
	savederrno = errno;
	err = -1 ;
	goto out_clean;
	}

	memset(ip, 0, sizeof(struct nozzle_ip));
	strncpy(ip->ipaddr, ipaddr, IPADDR_CHAR_MAX);
	strncpy(ip->prefix, prefix, PREFIX_CHAR_MAX);
	if (!strchr(ip->ipaddr, ':')) {
	ip->domain = AF_INET;
	} else {
	ip->domain = AF_INET6;
	}

	/*
	* if user asks for an IPv6 address, but MTU < 1280
	* store the IP and bring it up later if and when MTU > 1280
	*/
	if ((ip->domain == AF_INET6) && (get_iface_mtu(nozzle) < 1280)) {
	err = 0;
	} else {
	if (nozzle->ip) {
	secondary = 1;
	}
	- err = _set_ip(nozzle, "add", ipaddr, prefix, error_string, secondary);
	+ err = _set_ip(nozzle, IP_ADD, ipaddr, prefix, error_string, secondary);
	savederrno = errno;
	}

	if (err) {
	free(ip);
	goto out_clean;
	}

	if (nozzle->ip) {
	ip_last = nozzle->ip;
	while (ip_last->next != NULL) {
	ip_last = ip_last->next;
	}
	ip_last->next = ip;
	} else {
	nozzle->ip = ip;
	}

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_del_ip(nozzle_t nozzle, const char ipaddr, const char prefix, char **error_string)
	{
	int err = 0, savederrno = 0;
	int found = 0;
	struct nozzle_ip ip = NULL, ip_prev = NULL;

	if ((!ipaddr) \|\| (!prefix) \|\| (!error_string)) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	found = find_ip(nozzle, ipaddr, prefix, &ip, &ip_prev);
	if (!found) {
	goto out_clean;
	}

	- err = _set_ip(nozzle, "del", ipaddr, prefix, error_string, 0);
	+ err = _set_ip(nozzle, IP_DEL, ipaddr, prefix, error_string, 0);
	savederrno = errno;
	if (!err) {
	if (ip == ip_prev) {
	nozzle->ip = ip->next;
	} else {
	ip_prev->next = ip->next;
	}
	free(ip);
	}

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_get_ips(const nozzle_t nozzle, char *ipaddr_list, int entries)
	{
	int err = 0, savederrno = 0;
	int found = 0;
	char *ip_list = NULL;
	int size = 0, offset = 0, len;
	struct nozzle_ip *ip = NULL;

	if ((!ipaddr_list) \|\| (!entries)) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	goto out_clean;
	}

	ip = nozzle->ip;

	while (ip) {
	found++;
	ip = ip->next;
	}

	if (!found) {
	*ipaddr_list = NULL;
	*entries = 0;
	goto out_clean;
	}

	size = found * (IPADDR_CHAR_MAX + PREFIX_CHAR_MAX + 2);

	ip_list = malloc(size);
	if (!ip_list) {
	savederrno = errno;
	err = -1;
	goto out_clean;
	}

	memset(ip_list, 0, size);

	ip = nozzle->ip;

	while (ip) {
	len = strlen(ip->ipaddr);
	memmove(ip_list + offset, ip->ipaddr, len);
	offset = offset + len + 1;
	len = strlen(ip->prefix);
	memmove(ip_list + offset, ip->prefix, len);
	offset = offset + len + 1;
	ip = ip->next;
	}

	*ipaddr_list = ip_list;
	*entries = found;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_run_updown(const nozzle_t nozzle, uint8_t action, char **exec_string)
	{
	int err = 0, savederrno = 0;
	char command[PATH_MAX];
	const char *action_str = NULL;
	struct stat sb;

	if (action > NOZZLE_POSTDOWN) {
	errno = EINVAL;
	return -1;
	}

	if (!exec_string) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	if (!nozzle->hasupdown) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	switch(action) {
	case NOZZLE_PREUP:
	action_str = "pre-up.d";
	break;
	case NOZZLE_UP:
	action_str = "up.d";
	break;
	case NOZZLE_DOWN:
	action_str = "down.d";
	break;
	case NOZZLE_POSTDOWN:
	action_str = "post-down.d";
	break;
	}

	memset(command, 0, PATH_MAX);

	snprintf(command, PATH_MAX, "%s%s/%s", nozzle->updownpath, action_str, nozzle->name);

	err = stat(command, &sb);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	err = execute_bin_sh_command(command, exec_string);
	savederrno = errno;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	/*
	* functions below should be completed
	*/

	nozzle_t nozzle_open(char devname, size_t devname_size, const char updownpath)
	{
	int savederrno = 0;
	nozzle_t nozzle = NULL;
	char *temp_mac = NULL;
	#ifdef KNET_LINUX
	struct ifreq ifr;
	#endif
	#ifdef KNET_BSD
	uint16_t i;
	long int nozzlenum = 0;
	char curnozzle[IFNAMSIZ];
	#endif

	if (devname == NULL) {
	errno = EINVAL;
	return NULL;
	}

	if (devname_size < IFNAMSIZ) {
	errno = EINVAL;
	return NULL;
	}

	if (strlen(devname) > IFNAMSIZ) {
	errno = E2BIG;
	return NULL;
	}

	#ifdef KNET_BSD
	/*
	* BSD does not support named devices like Linux
	* but it is possible to force a nozzleX device number
	* where X is 0 to 255.
	*/
	if (strlen(devname)) {
	if (strncmp(devname, "tap", 3)) {
	errno = EINVAL;
	return NULL;
	}
	errno = 0;
	nozzlenum = strtol(devname+3, NULL, 10);
	if (errno) {
	errno = EINVAL;
	return NULL;
	}
	if ((nozzlenum < 0) \|\| (nozzlenum > 255)) {
	errno = EINVAL;
	return NULL;
	}
	}
	#endif

	if (updownpath) {
	/* only absolute paths */
	if (updownpath[0] != '/') {
	errno = EINVAL;
	return NULL;
	}
	if (strlen(updownpath) >= UPDOWN_PATH_MAX) {
	errno = E2BIG;
	return NULL;
	}
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return NULL;
	}

	if (!lib_init) {
	lib_cfg.head = NULL;
	#ifdef KNET_LINUX
	+ lib_cfg.nlsock = nl_socket_alloc();
	+ if (!lib_cfg.nlsock) {
	+ savederrno = errno;
	+ goto out_error;
	+ }
	+ if (nl_connect(lib_cfg.nlsock, NETLINK_ROUTE) < 0) {
	+ savederrno = EBUSY;
	+ goto out_error;
	+ }
	lib_cfg.ioctlfd = socket(AF_INET, SOCK_STREAM, 0);
	#endif
	#ifdef KNET_BSD
	lib_cfg.ioctlfd = socket(AF_LOCAL, SOCK_DGRAM, 0);
	#endif
	if (lib_cfg.ioctlfd < 0) {
	savederrno = errno;
	goto out_error;
	}
	lib_init = 1;
	}

	nozzle = malloc(sizeof(struct nozzle_iface));
	if (!nozzle) {
	savederrno = ENOMEM;
	goto out_error;
	}

	memset(nozzle, 0, sizeof(struct nozzle_iface));

	#ifdef KNET_BSD
	if (!strlen(devname)) {
	for (i = 0; i < 256; i++) {
	snprintf(curnozzle, sizeof(curnozzle) - 1, "/dev/tap%u", i);
	nozzle->fd = open(curnozzle, O_RDWR);
	savederrno = errno;
	if (nozzle->fd > 0) {
	break;
	}
	}
	snprintf(curnozzle, sizeof(curnozzle) -1 , "tap%u", i);
	} else {
	snprintf(curnozzle, sizeof(curnozzle) - 1, "/dev/%s", devname);
	nozzle->fd = open(curnozzle, O_RDWR);
	savederrno = errno;
	snprintf(curnozzle, sizeof(curnozzle) - 1, "%s", devname);
	}
	if (nozzle->fd < 0) {
	savederrno = EBUSY;
	goto out_error;
	}
	strncpy(devname, curnozzle, IFNAMSIZ);
	strncpy(nozzle->name, curnozzle, IFNAMSIZ);
	#endif

	#ifdef KNET_LINUX
	if ((nozzle->fd = open("/dev/net/tun", O_RDWR)) < 0) {
	savederrno = errno;
	goto out_error;
	}

	memset(&ifr, 0, sizeof(struct ifreq));
	memmove(ifname, devname, IFNAMSIZ);
	ifr.ifr_flags = IFF_TAP \| IFF_NO_PI;

	if (ioctl(nozzle->fd, TUNSETIFF, &ifr) < 0) {
	savederrno = errno;
	goto out_error;
	}

	if ((strlen(devname) > 0) && (strcmp(devname, ifname) != 0)) {
	savederrno = EBUSY;
	goto out_error;
	}

	strncpy(devname, ifname, IFNAMSIZ);
	strncpy(nozzle->name, ifname, IFNAMSIZ);
	#endif

	nozzle->default_mtu = get_iface_mtu(nozzle);
	if (nozzle->default_mtu < 0) {
	savederrno = errno;
	goto out_error;
	}

	if (get_iface_mac(nozzle, &temp_mac) < 0) {
	savederrno = errno;
	goto out_error;
	}

	strncpy(nozzle->default_mac, temp_mac, 18);
	free(temp_mac);

	if (updownpath) {
	int len = strlen(updownpath);

	strcpy(nozzle->updownpath, updownpath);
	if (nozzle->updownpath[len-1] != '/') {
	nozzle->updownpath[len] = '/';
	}
	nozzle->hasupdown = 1;
	}

	nozzle->next = lib_cfg.head;
	lib_cfg.head = nozzle;

	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return nozzle;

	out_error:
	destroy_iface(nozzle);
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return NULL;
	}

	int nozzle_close(nozzle_t nozzle)
	{
	int err = 0, savederrno = 0;
	nozzle_t temp = lib_cfg.head;
	nozzle_t prev = lib_cfg.head;
	struct nozzle_ip ip, ip_next;

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	while ((temp) && (temp != nozzle)) {
	prev = temp;
	temp = temp->next;
	}

	if (nozzle == prev) {
	lib_cfg.head = nozzle->next;
	} else {
	prev->next = nozzle->next;
	}

	ip = nozzle->ip;
	while (ip) {
	ip_next = ip->next;
	free(ip);
	ip = ip_next;
	}

	destroy_iface(nozzle);

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_set_up(nozzle_t nozzle)
	{
	int err = 0, savederrno = 0;
	struct ifreq ifr;

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	if (nozzle->up) {
	goto out_clean;
	}

	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);

	err = ioctl(lib_cfg.ioctlfd, SIOCGIFFLAGS, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	ifr.ifr_flags \|= IFF_UP \| IFF_RUNNING;
	err = ioctl(lib_cfg.ioctlfd, SIOCSIFFLAGS, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	nozzle->up = 1;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_set_down(nozzle_t nozzle)
	{
	int err = 0, savederrno = 0;

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	err = set_iface_down(nozzle);
	savederrno = errno;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_get_mtu(const nozzle_t nozzle)
	{
	int err = 0, savederrno = 0;

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	err = get_iface_mtu(nozzle);
	savederrno = errno;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	savederrno = errno;
	return err;
	}

	int nozzle_get_mac(const nozzle_t nozzle, char **ether_addr)
	{
	int err = 0, savederrno = 0;

	if (!ether_addr) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	err = get_iface_mac(nozzle, ether_addr);

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_set_mac(nozzle_t nozzle, const char *ether_addr)
	{
	int err = 0, savederrno = 0;
	struct ifreq ifr;

	if (!ether_addr) {
	errno = EINVAL;
	return -1;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = EINVAL;
	err = -1;
	goto out_clean;
	}

	memset(&ifr, 0, sizeof(struct ifreq));
	strncpy(ifname, nozzle->name, IFNAMSIZ);
	#ifdef KNET_LINUX
	err = ioctl(lib_cfg.ioctlfd, SIOCGIFHWADDR, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	memmove(ifr.ifr_hwaddr.sa_data, ether_aton(ether_addr), ETH_ALEN);

	err = ioctl(lib_cfg.ioctlfd, SIOCSIFHWADDR, &ifr);
	savederrno = errno;
	#endif
	#ifdef KNET_BSD
	err = ioctl(lib_cfg.ioctlfd, SIOCGIFADDR, &ifr);
	if (err) {
	savederrno = errno;
	goto out_clean;
	}

	memmove(ifr.ifr_addr.sa_data, ether_aton(ether_addr), ETHER_ADDR_LEN);
	ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;

	err = ioctl(lib_cfg.ioctlfd, SIOCSIFLLADDR, &ifr);
	savederrno = errno;
	#endif
	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return err;
	}

	int nozzle_reset_mac(nozzle_t nozzle)
	{
	return nozzle_set_mac(nozzle, nozzle->default_mac);
	}

	nozzle_t nozzle_get_handle_by_name(const char *devname)
	{
	int savederrno = 0;
	nozzle_t nozzle;

	if ((devname == NULL) \|\| (strlen(devname) > IFNAMSIZ)) {
	errno = EINVAL;
	return NULL;
	}

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return NULL;
	}

	nozzle = lib_cfg.head;
	while (nozzle != NULL) {
	if (!strcmp(devname, nozzle->name))
	break;
	nozzle = nozzle->next;
	}

	if (!nozzle) {
	savederrno = ENOENT;
	}

	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return nozzle;
	}

	const char *nozzle_get_name_by_handle(const nozzle_t nozzle)
	{
	int savederrno = 0;
	char *name = NULL;

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return NULL;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = ENOENT;
	goto out_clean;
	}

	name = nozzle->name;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return name;
	}

	int nozzle_get_fd(const nozzle_t nozzle)
	{
	int fd = -1, savederrno = 0;

	savederrno = pthread_mutex_lock(&config_mutex);
	if (savederrno) {
	errno = savederrno;
	return -1;
	}

	if (!is_valid_nozzle(nozzle)) {
	savederrno = ENOENT;
	fd = -1;
	goto out_clean;
	}

	fd = nozzle->fd;

	out_clean:
	pthread_mutex_unlock(&config_mutex);
	errno = savederrno;
	return fd;
	}
	diff --git a/libnozzle/tests/Makefile.am b/libnozzle/tests/Makefile.am
	index e02593df..78419d1c 100644
	--- a/libnozzle/tests/Makefile.am
	+++ b/libnozzle/tests/Makefile.am
	@@ -1,40 +1,40 @@
	#
	# Copyright (C) 2010-2017 Red Hat, Inc. All rights reserved.
	#
	# Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
	#
	# This software licensed under GPL-2.0+, LGPL-2.0+
	#

	MAINTAINERCLEANFILES = Makefile.in

	include $(top_srcdir)/build-aux/check.mk

	EXTRA_DIST = tap_updown_bad tap_updown_good api-test-coverage

	if BUILD_LIBNOZZLE

	check_PROGRAMS = nozzle_test

	TESTS = $(check_PROGRAMS)

	noinst_PROGRAMS = $(check_PROGRAMS)

	check-local: check-api-test-coverage

	check-api-test-coverage:
	chmod u+x $(top_srcdir)/libnozzle/tests/api-test-coverage
	$(top_srcdir)/libnozzle/tests/api-test-coverage $(top_srcdir) $(top_builddir)

	nozzle_test_SOURCES = nozzle_test.c \
	../internals.c

	nozzle_test_CPPFLAGS = -I$(top_srcdir)/libnozzle \
	-DABSBUILDDIR=\"$(abs_builddir)\"

	-nozzle_test_CFLAGS = $(PTHREAD_CFLAGS)
	+nozzle_test_CFLAGS = $(PTHREAD_CFLAGS) $(libnl_CFLAGS)

	nozzle_test_LDFLAGS = $(top_builddir)/libnozzle/libnozzle.la \
	- $(PTHREAD_LIBS)
	+ $(PTHREAD_LIBS) $(libnl_LIBS)

	endif

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