From the perspective of any application, Firezone is a layer-3 network
and will thus use the host's networking stack to form IP packets for
whichever application protocol is in use (UDP, TCP, etc). These packets
then get encapsulated into UDP packets by Firezone and sent to a
Gateway.
As a result of this design, the IP header seen by the networking stacks
of the Client and the receiving service are not visible to any
intermediary along the network path of the Client and Gateway.
In case this network path is congested and middleboxes such as routers
need to drop packets, they will look at the ECN bits in the IP header
(of the UDP packet generated by a Client or Gateway) and flip a bit in
case the previous value indicated support for ECN (`0x01` or `0x10`).
When received by a network stack that supports ECN, seeing `0x11` means
that the network path is congested and that it must reduce its
send/receive windows (or otherwise throttle the connection).
At present, this doesn't work with Firezone because of the
aforementioned encapsulation of IP packets. To support ECN, we need to
therefore:
- Copy ECN bits from a received IP packet to the datagram that
encapsulates it: This ensures that if the Client's network stack support
ECN, we mirror that support on the wire.
- Copy ECN bits from a received datagram to the IP packet the is sent to
the TUN device: This ensures that if the "Congestion Experienced" bit
get set along the network path between Client and Gateway, we reflect
that accordingly on the IP packet emitted by the TUN device.
Resolves: #3758
---------
Signed-off-by: Thomas Eizinger <thomas@eizinger.io>
Co-authored-by: Jamil Bou Kheir <jamilbk@users.noreply.github.com>
- Adds more actor groups to the existing `oidc_provider`
- Configures a rand seed so our seed data is reproducible across
machines
- Formats the seeds file to allow for some refactoring a later PR
- Adds a `Mock` identity provider adapter with sync enabled
Closes#4883
Refs #7005
Adds support for Ubuntu 24.04, drops support for Ubuntu 20.04
Known issues:
- On Ubuntu 22.04, sometimes GNOME shows the wrong tray icon
- On Ubuntu 24.04, the first time you open the tray menu, GNOME takes a
long time to open the menu.
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
Refs #6927
This PR creates a GTK+ event loop, a blank window, and the tray menu. It
connects to the IPC service, you can sign in and everything, but the
About window, Settings window, and Welcome window aren't implemented.
We build a deb package in CI but it isn't pushed to the draft releases
in CD yet.
Pros over Iced:
- More mature
- Easy integration with `tray-icon`
- Small binaries (< 1 MB for this example)
Cons:
- GTK 3.x is abandoned as of March. GTK 4 isn't packaged for Ubuntu
20.04.
- Widgets might be hard to use
- Hard to set up on Windows, only using this for Linux for now
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
Co-authored-by: Thomas Eizinger <thomas@eizinger.io>
Closes#5811
<img width="206" alt="image"
src="https://github.com/user-attachments/assets/a2c46bb6-c76a-49ca-a933-4363597d4029">
- Waits a random amount of time up to 24 hours before the first network
check, to avoid the thundering herd problem
- Polls every 24 hours (86,400 seconds) after that
- Saves the network response to disk so we ~~can show "Update ready"
immediately at startup~~ won't notify twice about the same version
- Not clear whether suspending the computer suspends the timer - "it is
also not specified whether system suspends count as elapsed time or not.
The behavior varies across platforms and Rust versions."
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
Currently, `tunnel_test` uses a rather naive approach when dispatching
`Transmit`s. In particular, it checks client, gateway and relay
separately whether they "want" a certain packet. In a real network,
these packets are routed based on their IP.
To mimic something similar, we introduce a `Host` abstraction that wraps
each component: client, gateway and relay. Additionally, we introduce a
`RoutingTable` where we can add and remove hosts. With these things in
place, routing a `Transmit` is as easy as looking up the destination IP
in the routing table and dispatching to the corresponding host.
Our hosts are type-safe: client, gateway and relay have different types.
Thus, we abstract over them using a `HostId` in order to know, which
host a certain message is for. Following these patches, we can easily
introduce multiple gateways and relays to this test by simply making
more entries in this routing table. This will increase the test coverage
of connlib.
Lastly, this patch massively increases the performance of `tunnel_test`.
It turns out that previously, we spent a lot of CPU cycles accessing
"random" IPs from very large iterators. With this patch, we take a
limited range of 100 IPs that we sample from, thus drastically
increasing performance of this test. The configured 1000 testcases
execute in 3s on my machine now (with opt-level 1 which is what we use
in CI).
---------
Signed-off-by: Thomas Eizinger <thomas@eizinger.io>
Closes#5199
Not ready for review
```[tasklist]
### Before merging
- [x] Remove that outline at the top
- [x] Replace Mermaid diagrams with pre-rendered SVGs
- [x] Fix or ditch the diagrams
- [x] Use `we` instead of `I`
- [x] Elaborate on Tauri's architecture
- [x] Elaborate on our architecture
- [x] Grep for `TODO`s
- [x] Change "secure tunnel" to "connlib" to be more specific
- [x] Double-check alt texts on images
- [x] Last look
- [x] Fix the publish date
- [x] Last check that I didn't break anything else on the site
```
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
Co-authored-by: Jamil <jamilbk@users.noreply.github.com>
