Support managing the loopback interface through NM as the users want to
set the proper mtu for loopback interface when forwarding the packets.
Additionally, the IP addresses, DNS, route and routing rules are also
allowed to configure for the loopback connection profiles.
https://bugzilla.redhat.com/show_bug.cgi?id=2060905
These are just general purpose D-Bus utils, based on glib and GDBus.
They fit perfectly to libnm-glib-aux. Move the code.
Also, there is already the file "src/core/nm-dbus-utils.c", having two
files with the same name on our source tree is just confusing.
libnm-core-impl has lots of internal meta data about the properties.
In particular, which properties exist (their names), and their D-Bus
type.
We should use this information for our manual pages. For example,
currently `man nm-settings-dbus` has nonsense like: "Value Type: array
of string", when it should be reall "as".
In a first step, generate an XML with that meta data for later use.
libnm-core currently has a dependency on crypto libraries (either
"gnutls", "nss" or "null"). We need this huge dependency for few cases.
Move the crypto code to a separate static library"src/libnm-crypto/libnm-crypto.la".
The reasoning is that it becomes clearer where we have this dependency,
to use it more consciously, and to be better see how it's used.
We clearly need the crypto functionality in libnm. But do we also need
it in the daemon? Could we ever link the daemon without crypto libraries?
The goal of splitting the crypto part out, to better understand the
crypto dependency.
Avoid dependencies but explicitly link the static library where it is
used.
This also fixes that we linked libnm-log-core into
libnm-settings-plugin-ifcfg-rh.so, which duplicated the symbols
while it should used them from NetworkManager.
We want that there is a clear hierarchy and dependency between
modules/directories.
But tests sometimes break that.
For example, "shared/nm-glib-aux/tests" link against libnm-glib-aux
and libnm-log-null. But "shared/nm-log-null" depends on "shared/nm-glib-aux".
Hence, for the test there is a circular dependency.
Break that, by including all tests at the end.
The alternative would be ugly in different ways.
glib requires G_LOG_DOMAIN defined so that log messages are labeled
to belong to NetworkManager or libnm.
However, we don't actually want to use glib logging. Our library libnm
MUST not log anything, because it spams the user's stdout/stderr.
Instead, a library must report notable events via its API. Note that
there is also LIBNM_CLIENT_DEBUG to explicitly enable debug logging,
but that doesn't use glib logging either.
Also, the daemon does not use glib logging instead it logs to syslog.
When run with `--debug`.
Hence, it's not useful for us to define different G_LOG_DOMAIN per
library/application, because none of our libraries/applications should
use glib logging.
It also gets slightly confusing, because we have the static library like
`src/libnm-core-impl`, which is both linked into `libnm` (the library)
and `NetworkManager` (the daemon). Which logging domain should they use?
Set the G_LOG_DOMAIN to "nm" everywhere. But no longer do it via `-D`
arguments to the compiler.
See-also: https://developer.gnome.org/glib/stable/glib-Message-Logging.html#G-LOG-DOMAIN:CAPS
"libnm-core/" is rather complicated. It provides a static library that
is linked into libnm.so and NetworkManager. It also contains public
headers (like "nm-setting.h") which are part of public libnm API.
Then we have helper libraries ("libnm-core/nm-libnm-core-*/") which
only rely on public API of libnm-core, but are themself static
libraries that can be used by anybody who uses libnm-core. And
"libnm-core/nm-libnm-core-intern" is used by libnm-core itself.
Move "libnm-core/" to "src/". But also split it in different
directories so that they have a clearer purpose.
The goal is to have a flat directory hierarchy. The "src/libnm-core*/"
directories correspond to the different modules (static libraries and set
of headers that we have). We have different kinds of such modules because
of how we combine various code together. The directory layout now reflects
this.
