netlink: drop libnl3 dependency

From libnl3, we only used the helper function to parse/generate netlink
messages and the socket functions to send/receive messages. We don't
need an external dependency to do that, it is simple enough.

Drop the libnl3 dependency, and replace all missing code by directly
copying it from libnl3 sources. At this point, I mostly tried to
import the required bits to make it working with few modifications.

Note that this increases the binary size of NetworkManager by 4736 bytes
for contrib/rpm build on x86_64. In the future, we can simplify the code
further.

A few modifications from libnl3 are:

- netlink errors NLE_* are now in the domain or regular errno.
  The distinction of having to bother with two kinds of error
  number domains was annoying.

- parts of the callback handling is copied partially and unused parts
  are dropped. Especially, the verbose/debug handlers are not used.
  In following commits, the callback handling will be significantly
  simplified.

- the complex handling of seleting ports was simplified. We now always
  let kernel choose the right port automatically.

3 files changed, 1 insertions, 4 deletions

diff --git a/contrib/fedora/REQUIRED_PACKAGES b/contrib/fedora/REQUIRED_PACKAGES
index a63a4196b..27606d194 100644
--- a/contrib/fedora/REQUIRED_PACKAGES
+++ b/contrib/fedora/REQUIRED_PACKAGES
@@ -30,7 +30,6 @@ yum install \
     jansson-devel \
     libcurl-devel \
     libndp-devel \
-    libnl3-devel \
     libpsl-devel \
     libselinux-devel \
     libtool \
diff --git a/contrib/fedora/nm-live-vm/build.sh b/contrib/fedora/nm-live-vm/build.sh
index 3033fbc32..633386170 100755
--- a/contrib/fedora/nm-live-vm/build.sh
+++ b/contrib/fedora/nm-live-vm/build.sh
@@ -32,7 +32,7 @@ BUILD_PACKAGES="qemu febootstrap mock rpmdevtools"
 ARCH=i386
 ROOT="${ROOT:-"fedora-20-$ARCH"}"
 TREE="/var/lib/mock/$ROOT/root"
-PACKAGES="kernel passwd git autoconf automake libtool intltool gtk-doc libnl3-devel
+PACKAGES="kernel passwd git autoconf automake libtool intltool gtk-doc
     dbus-glib-devel libuuid-devel nss-devel ppp-devel newt-devel libndp-devel
     readline-devel
     gobject-introspection-devel
diff --git a/contrib/fedora/rpm/NetworkManager.spec b/contrib/fedora/rpm/NetworkManager.spec
index 8f9480802..c6678c1d1 100644
--- a/contrib/fedora/rpm/NetworkManager.spec
+++ b/contrib/fedora/rpm/NetworkManager.spec
@@ -10,7 +10,6 @@
 %global dbus_glib_version 0.100
 
 %global wireless_tools_version 1:28-0pre9
-%global libnl3_version 3.2.7
 
 %global ppp_version %(sed -n 's/^#define\\s*VERSION\\s*"\\([^\\s]*\\)"$/\\1/p' %{_includedir}/pppd/patchlevel.h 2>/dev/null | grep . || echo bad)
 %global glib2_version %(pkg-config --modversion glib-2.0 2>/dev/null || echo bad)
@@ -130,7 +129,6 @@ BuildRequires: glib2-devel >= 2.40.0
 BuildRequires: gobject-introspection-devel >= 0.10.3
 BuildRequires: gettext-devel
 BuildRequires: pkgconfig
-BuildRequires: libnl3-devel >= %{libnl3_version}
 BuildRequires: automake autoconf intltool libtool
 %if %{with ppp}
 BuildRequires: ppp-devel >= 2.4.5