Automatically disabled when
- iproute2 is enabled
- libnl-genl is missing on Linux
- libnv is missing on FreeBSD
Signed-off-by: Frank Lichtenheld <fr...@lichtenheld.com>
---
.github/workflows/build.yaml | 13 ++----
configure.ac | 79 ++++++++++++++++++++++++++++--------
2 files changed, 66 insertions(+), 26 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
v4: add updates for GHA
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 699964fd..3265725f 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -275,10 +275,12 @@ jobs:
sslpkg: "libssl1.0-dev"
ssllib: openssl
libname: OpenSSL 1.0.2
+ extraconf: "--disable-dco"
- os: ubuntu-18.04
sslpkg: "libssl-dev"
libname: OpenSSL 1.1.1
ssllib: openssl
+ extraconf: "--disable-dco"
- os: ubuntu-20.04
sslpkg: "libssl-dev"
libname: OpenSSL 1.1.1
@@ -312,22 +314,15 @@ jobs:
libname: OpenSSL 1.1.1
ssllib: openssl
extraconf: "--disable-lzo --disable-lz4"
- - os: ubuntu-20.04
- sslpkg: "libssl-dev"
- libname: OpenSSL 1.1.1
- ssllib: openssl
- extraconf: "--enable-dco"
- nlpkg: "libnl-genl-3-dev"
name: "gcc - ${{matrix.os}} - ${{matrix.libname}} ${{matrix.extraconf}}"
env:
SSLPKG: "${{matrix.sslpkg}}"
- NLPKG: "${{matrix.nlpkg}}"
runs-on: ${{matrix.os}}
steps:
- name: Install dependencies
- run: sudo apt update && sudo apt install -y liblzo2-dev libpam0g-dev
liblz4-dev libcap-ng-dev linux-libc-dev man2html libcmocka-dev python3-docutils
libtool automake autoconf ${SSLPKG} ${NLPKG}
+ run: sudo apt update && sudo apt install -y liblzo2-dev libpam0g-dev
liblz4-dev libcap-ng-dev libnl-genl-3-dev linux-libc-dev man2html libcmocka-dev
python3-docutils libtool automake autoconf ${SSLPKG}
- name: Checkout OpenVPN
uses: actions/checkout@v3
- name: autoconf
@@ -354,7 +349,7 @@ jobs:
runs-on: ${{matrix.os}}
steps:
- name: Install dependencies
- run: sudo apt update && sudo apt install -y liblzo2-dev libpam0g-dev
liblz4-dev libcap-ng-dev linux-libc-dev man2html clang libcmocka-dev
python3-docutils libtool automake autoconf libmbedtls-dev
+ run: sudo apt update && sudo apt install -y liblzo2-dev libpam0g-dev
liblz4-dev libcap-ng-dev libnl-genl-3-dev linux-libc-dev man2html clang
libcmocka-dev python3-docutils libtool automake autoconf libmbedtls-dev
- name: Checkout OpenVPN
uses: actions/checkout@v3
- name: autoconf
diff --git a/configure.ac b/configure.ac
index 66ba6f38..5a9a55d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -157,14 +157,27 @@ AC_ARG_ENABLE(
AC_ARG_ENABLE(
[dco],
- [AS_HELP_STRING([--enable-dco], [enable data channel offload support
using the ovpn-dco kernel module (always enabled on Windows)
@<:@default=no@:>@])],
+ [AS_HELP_STRING([--disable-dco], [enable data channel offload support
using the ovpn-dco kernel module (always enabled on Windows)
@<:@default=yes@:>@])],
,
- [enable_dco="no"]
+ [
+ case "$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"]
)
@@ -549,7 +562,7 @@ AC_CHECK_DECLS(
,
[[${SOCKET_INCLUDES}]]
)
-AC_CHECKING([anonymous union support])
+AC_MSG_CHECKING([anonymous union support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
@@ -784,28 +797,60 @@ PKG_CHECK_MODULES(
)
-if test "$enable_dco" = "yes"; then
+if test "$enable_dco" != "no"; then
+ enable_dco_arg="$enable_dco"
+ if test "${enable_iproute2}" = "yes"; then
+ AC_MSG_WARN([iproute2 support cannot be enabled when using DCO])
+ enable_dco="no"
+ fi
+ case "$host" in
+ *-*-linux*)
dnl
dnl Include generic netlink library used to talk to ovpn-dco
dnl
- case "$host" in
- *-*-linux*)
PKG_CHECK_MODULES([LIBNL_GENL],
[libnl-genl-3.0 >= 3.4.0],
[have_libnl="yes"],
- [AC_MSG_ERROR([libnl-genl-3.0 package
not found or too old. Is the development package and pkg-config installed? Must
be version 3.4.0 or newer])]
+ [
+ AC_MSG_WARN([libnl-genl-3.0 package
not found or too old. Is the development package and pkg-config installed? Must
be version 3.4.0 or newer for DCO])
+ enable_dco="no"
+ ]
)
-
- CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"
- LIBS="${LIBS} ${LIBNL_GENL_LIBS}"
-
- AC_DEFINE(ENABLE_DCO, 1, [Enable shared data channel
offload])
- AC_MSG_NOTICE([Enabled ovpn-dco support for Linux])
+ if test "$enable_dco" = "no"; then
+ if test "$enable_dco_arg" = "auto"; then
+ AC_MSG_WARN([DCO support disabled])
+ else
+ AC_MSG_ERROR([DCO support can't be
enabled])
+ fi
+ else
+ CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"
+ LIBS="${LIBS} ${LIBNL_GENL_LIBS}"
+
+ AC_DEFINE(ENABLE_DCO, 1, [Enable shared data
channel offload])
+ AC_MSG_NOTICE([Enabled ovpn-dco support for
Linux])
+ fi
;;
*-*-freebsd*)
- LIBS="${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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