Automatically disabled when
- iproute2 is enabled
(Don't want to force people specifying --disable-dco explicitely)
- libnv is missing on FreeBSD
(FreeBSD version too old anyway)
Will still error out if libnl-genl is missing on Linux to
make people aware of the new dependency.
Signed-off-by: Frank Lichtenheld <fr...@lichtenheld.com>
---
configure.ac | 82 ++++++++++++++++++++++++++++++++++++++++------------
1 file changed, 63 insertions(+), 19 deletions(-)
v2: error out when libnl-genl is missing as discussed with ordex on
IRC.
v3:
- improvements to the messages, suggested by Selva
- further improvements to the default specification, trying to make it clear
- if enabling iproute2, do not test for libnl-genl
diff --git a/configure.ac b/configure.ac
index 78c99740..ba33ccd8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -146,14 +146,27 @@ AC_ARG_ENABLE(
AC_ARG_ENABLE(
[dco],
- [AS_HELP_STRING([--enable-dco], [enable data channel offload support
using the ovpn-dco kernel module (always enabled on Windows)
@<:@default=no@:>@])],
+ [AS_HELP_STRING([--disable-dco], [disable data channel offload support
using the ovpn-dco kernel module @<:@default=yes@:>@ on Linux/FreeBSD, can't
disable on Windows])],
,
- [enable_dco="no"]
+ [
+ case "$host" in
+ *-*-linux*)
+ enable_dco="auto"
+ ;;
+ *-*-freebsd*)
+ enable_dco="auto"
+ ;;
+ *)
+ # note that this does not disable it for Windows
+ enable_dco="no"
+ ;;
+ esac
+ ]
)
AC_ARG_ENABLE(
[iproute2],
- [AS_HELP_STRING([--enable-iproute2], [enable support for iproute2
@<:@default=no@:>@])],
+ [AS_HELP_STRING([--enable-iproute2], [enable support for iproute2
(disables DCO) @<:@default=no@:>@])],
,
[enable_iproute2="no"]
)
@@ -536,7 +549,7 @@ AC_CHECK_DECLS(
,
[[${SOCKET_INCLUDES}]]
)
-AC_CHECKING([anonymous union support])
+AC_MSG_CHECKING([anonymous union support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
@@ -771,28 +784,59 @@ PKG_CHECK_MODULES(
)
-if test "$enable_dco" = "yes"; then
-dnl
-dnl Include generic netlink library used to talk to ovpn-dco
-dnl
+if test "$enable_dco" != "no"; then
+ enable_dco_arg="$enable_dco"
+ if test "${enable_iproute2}" = "yes"; then
+ AC_MSG_WARN([DCO cannot be enabled when using iproute2])
+ enable_dco="no"
+ fi
case "$host" in
*-*-linux*)
- PKG_CHECK_MODULES([LIBNL_GENL],
+ if test "$enable_dco" = "no"; then
+ if test "$enable_dco_arg" = "auto"; then
+ AC_MSG_WARN([DCO support disabled])
+ else
+ AC_MSG_ERROR([DCO support can't be
enabled])
+ fi
+ else
+ dnl
+ dnl Include generic netlink library used to
talk to ovpn-dco
+ dnl
+ PKG_CHECK_MODULES([LIBNL_GENL],
[libnl-genl-3.0 >= 3.4.0],
[have_libnl="yes"],
- [AC_MSG_ERROR([libnl-genl-3.0 package
not found or too old. Is the development package and pkg-config installed? Must
be version 3.4.0 or newer])]
- )
-
- CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"
- LIBS="${LIBS} ${LIBNL_GENL_LIBS}"
+ [
+ AC_MSG_ERROR([libnl-genl-3.0 package
not found or too old. Is the development package and pkg-config installed? Must
be version 3.4.0 or newer for DCO])
+ ]
+ )
+ CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"
+ LIBS="${LIBS} ${LIBNL_GENL_LIBS}"
- AC_DEFINE(ENABLE_DCO, 1, [Enable shared data channel
offload])
- AC_MSG_NOTICE([Enabled ovpn-dco support for Linux])
+ AC_DEFINE(ENABLE_DCO, 1, [Enable shared data
channel offload])
+ AC_MSG_NOTICE([Enabled ovpn-dco support for
Linux])
+ fi
;;
*-*-freebsd*)
- LIBS="${LIBS} -lnv"
- AC_DEFINE(ENABLE_DCO, 1, [Enable data channel offload
for FreeBSD])
- AC_MSG_NOTICE([Enabled ovpn-dco support for FreeBSD])
+ AC_CHECK_LIB(
+ [nv],
+ [nvlist_create],
+ [
+ LIBS="${LIBS} -lnv"
+ AC_DEFINE(ENABLE_DCO, 1, [Enable data channel
offload for FreeBSD])
+ AC_MSG_NOTICE([Enabled ovpn-dco support for
FreeBSD])
+ ],
+ [
+ enable_dco="no"
+ AC_MSG_WARN([Name/Value pair library not
found.])
+ ]
+ )
+ if test "$enable_dco" = "no"; then
+ if test "$enable_dco_arg" = "auto"; then
+ AC_MSG_WARN([DCO support disabled])
+ else
+ AC_MSG_ERROR([DCO support can't be
enabled])
+ fi
+ fi
;;
*-mingw*)
AC_MSG_NOTICE([NOTE: --enable-dco ignored on Windows
because it's always enabled])
--
2.34.1
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