Usecase: when connecting to a public Wi-Fi with MAC address randomization
("wifi.cloned-mac-address=random") you get on every re-connect a new
IP address due to the changing MAC address.
"wifi.cloned-mac-address=stable" is the solution for that. But that
means, every time when reconnecting to this network, the same ID will
be reused. We want an ID that is stable for a while, but at a later
point a new ID should e generated when revisiting the Wi-Fi network.
Extend the stable-id to become dynamic and support templates/substitutions.
Currently supported is "${CONNECTION}", "${BOOT}" and "${RANDOM}".
Any unrecognized pattern is treated verbaim/untranslated.
"$$" is treated special to allow escaping the '$' character. This allows
the user to still embed verbatim '$' characters with the guarantee that
future versions of NetworkManager will still generate the same ID.
Of course, a user could just avoid '$' in the stable-id unless using
it for dynamic substitutions.
Later we might want to add more recognized substitutions. For example, it
could be useful to generate new IDs based on the current time. The ${} syntax
is extendable to support arguments like "${PERIODIC:weekly}".
Also allow "connection.stable-id" to be set as global default value.
Previously that made no sense because the stable-id was static
and is anyway strongly tied to the identity of the connection profile.
Now, with dynamic stable-ids it gets much more useful to specify
a global default.
Note that pre-existing stable-ids don't change and still generate
the same addresses -- unless they contain one of the new ${} patterns.
We require a network-id. Assert that it is set.
Also, we encode the stable-id as uint8. Thus, add
an assertion that we don't use more then 254 IDs.
If we ever make use of stable-type 255, we must extend
the encoding to allow for more values. The assertion
is there to catch that.
We set a dedicated route to reach the VPN gateway only if the parent
device has a gateway. If the parent device doesn't have a gateway (for
example in case of GSM connections) and the VPN gets the default
route, the VPN gateway will be contacted through the VPN itself, which
obviously doesn't work.
Set up a device route if the parent device doesn't provide a gateway.
https://bugzilla.redhat.com/show_bug.cgi?id=1403660
The only implementations were there for tracking the parent device.
That is now donw via nm_device_parent_*(), parent_changed_notify()
and _parent_notify_changed().
Multiple subclasses have a parent/link interface (NMDeviceIPTunnel,
NMDeviceVlan). Tracking the parent interface properly is midly
complicated to get right. So, instead of repeating it in each
subclass, track it in the parent device.
Move the updating/setting of the ip-ifindex/ip-iface to one place.
Properties should be for the most part immutable/read-only, and only
at particular places modified. That way, it's easier to track who
changes a property.
Also, add a logging line with "ip-ifname" prefix.
Most implementations of realize_start_notify() do the same
for link_changed().
Let NMDevice's base implementation of realize_start_notify() call
link_changed() -- which by default does notthing. This allows subclasses
to only overwrite link_changed().
Instead of overwriting constructed(), update the s390 subchannels via
realize_start_notify(). This makes more sense and is also more similar
to what other device implementations do.
All implementations of link_changed() chain up to NMDevice's
base implementation. Thus, everybody wants to set the carrier.
Refactor the code to set the carrier outside of link_changed().
Instead of creating a GSList use an array. That way, we save
the allocation and free of an GSList instance. Also, avoid
cloning the export path. It is stable.
Only use non-negative index values for the D-Bus path. This is purely
cosmetical, as the actual path value should be treated as opaque. Still,
avoid using 0 and start counting at 1.
An overflow of the 32 bit guint is possible and rather ugly
because the D-Bus path should be unique and not repeat.
Avoid that by extending the counter to 64 bit.
Use nm_utils_fd_get_contents() which has precisely all the steps implemented
to read data from a file descriptor.
There is a downside to this: previously you could compile shvar.c without
nm-core-utils.c. Now, the ifcfg implementation gained a dependency
on NM core utils. That would matter if we one day would like to build
shvar.c without core NetworkManager utils (but that is not planned).
Pre-process each line and parse the key and value.
Thus, keep the key already prepared.
The point is to do the parsing early and keep the
data in a more suitable format in shvarLine.
The shlist_delete*() are now named wrong, as they don't delete
the list entry. Anyway, they have only one caller, it's clearer
to inline them.
This way, during svSetValue() we need to iterate the entire
list only once.
nm_settings_add_connection_dbus() invokes the activation_add_done()
callback with a NULL @new_connection in case of error: add a check to
prevent a crash.
This usually indicates that the driver missed beacons from the AP, due to driver bugs
or faulty power-save management. It doesn't mean that the PSK is wrong.
Previously, we would require a @self argument and the @call_id in
nm_act_request_cancel_secrets(), although the @call_id already has
a pointer to @self.
In principle that is not necessary, but it makes the API a bit
more robust as you need to care about the lifetime of the @req
as well.
However it is a bit inconvenient, because it requires that caller to
track both the activation request and the call-id.
Now, allow nm_act_request_get_secrets() to instruct the call-id to
take an additional reference to @self. Later on, we would allow to omit
the argument during cancelling. We only allow this, if the call-id
takes a reference to @self.
