dnl A macro to check if this particular version of libnl supports particular common libnl functions

AC_DEFUN([AM_CHECK_LIBNL_FCS],

[

AC_CHECK_LIB($1,

[nl_socket_add_membership],

[AC_DEFINE([HAVE_NL_SOCKET_ADD_MEMBERSHIP], 1, [Does libnl have nl_socket_add_membership?])

],

)

AC_CHECK_LIB($1,

[nl_socket_modify_cb],

[AC_DEFINE([HAVE_NL_SOCKET_MODIFY_CB], 1, [Does libnl have nl_socket_modify_cb?])

],

)

AC_CHECK_LIB($1,

[rtnl_route_get_oif],

[AC_DEFINE([HAVE_RTNL_ROUTE_GET_OIF], 1, [Does libnl have rtnl_route_get_oif?])

],

)

AC_CHECK_LIB($1,

[nl_set_passcred],

[AC_DEFINE([HAVE_NL_SET_PASSCRED], 1, [Does libnl have nl_set_passcred?])

],

)

AC_CHECK_LIB($1,

[nl_socket_set_passcred],

[AC_DEFINE([HAVE_NL_SOCKET_SET_PASSCRED], 1, [Does libnl have nl_socket_set_passcred?])

],

)

])

dnl A macro to check the availability and version of libnetlink

AC_DEFUN([AM_CHECK_LIBNL1],

[

PKG_CHECK_MODULES(LIBNL1, libnl-1 >= 1.1,[

HAVE_LIBNL=1

HAVE_LIBNL1=1

LIBNL_CFLAGS="$LIBNL1_CFLAGS"

LIBNL_LIBS="$LIBNL1_LIBS"

AC_DEFINE_UNQUOTED(HAVE_LIBNL, 1, [Build with libnetlink support])

AC_DEFINE_UNQUOTED(HAVE_LIBNL1, 1, [Libnetlink version = 1])

AC_MSG_NOTICE([Building with libnl])

AC_CHECK_HEADERS(netlink.h)

AC_CHECK_LIB(nl, nl_connect, [ LIBNL_LIBS="-lnl" ], [AC_MSG_ERROR([libnl is required])])

AM_CHECK_LIBNL_FCS(nl)

],[AC_MSG_WARN([Netlink v1 support unavailable or too old])])

AC_SUBST(LIBNL_CFLAGS)

AC_SUBST(LIBNL_LIBS)

])

dnl A macro to check the availability of libnetlink version 3

AC_DEFUN([AM_CHECK_LIBNL3],

[

PKG_CHECK_MODULES(LIBNL3, [

libnl-3.0 >= 3.0

libnl-route-3.0 >= 3.0], [

HAVE_LIBNL=1

HAVE_LIBNL3=1

LIBNL_CFLAGS="$LIBNL3_CFLAGS"

LIBNL_LIBS="$LIBNL3_LIBS"

AC_DEFINE_UNQUOTED(HAVE_LIBNL, 1, [Build with libnetlink support])

AC_DEFINE_UNQUOTED(HAVE_LIBNL3, 1, [Libnetlink version = 3])

AC_MSG_NOTICE([Building with libnl3])

AM_CHECK_LIBNL_FCS(nl-3)

],[AC_MSG_WARN([Netlink v3 support unavailable or too old])])

AC_SUBST(LIBNL_CFLAGS)

AC_SUBST(LIBNL_LIBS)

])