7e196683a1
On Android, we can use [`addSearchDomain`](https://developer.android.com/reference/android/net/VpnService.Builder#addSearchDomain(java.lang.String)) to configure the search domain list for our VPN tunnel. Thankfully, this gets applied to the system resolver without any other hackery involved (unlike for Apple in #8421), and most apps use the system resolver for queries. The one exception to this are some network utilities like AndroDNS and Fing. Tested to work fine in Termux using `github.io` as the search domain, which responds to ICMP echoes to any subdomain: <img width="420" alt="Screenshot 2025-03-13 at 10 19 41 PM" src="https://github.com/user-attachments/assets/e156e644-08a8-4ab6-b49a-91ef92aabafd" /> Related #8410 --------- Co-authored-by: Thomas Eizinger <thomas@eizinger.io>
Rust development guide
Firezone uses Rust for all data plane components. This directory contains the Linux and Windows clients, and low-level networking implementations related to STUN/TURN.
We target the last stable release of Rust using rust-toolchain.toml.
If you are using rustup, that is automatically handled for you.
Otherwise, ensure you have the latest stable version of Rust installed.
Reading Client logs
The Client logs are written as JSONL for machine-readability.
To make them more human-friendly, pipe them through jq like this:
cd path/to/logs # e.g. `$HOME/.cache/dev.firezone.client/data/logs` on Linux
cat *.log | jq -r '"\(.time) \(.severity) \(.message)"'
Resulting in, e.g.
2024-04-01T18:25:47.237661392Z INFO started log
2024-04-01T18:25:47.238193266Z INFO GIT_VERSION = 1.0.0-pre.11-35-gcc0d43531
2024-04-01T18:25:48.295243016Z INFO No token / actor_name on disk, starting in signed-out state
2024-04-01T18:25:48.295360641Z INFO null
Benchmarking on Linux
The recommended way for benchmarking any of the Rust components is Linux' perf utility.
For example, to attach to a running application, do:
- Ensure the binary you are profiling is compiled with the
releaseprofile. sudo perf record -g --freq 10000 --pid $(pgrep <your-binary>).- Run the speed test or whatever load-inducing task you want to measure.
sudo perf script > profile.perf- Open profiler.firefox.com and load
profile.perf
Instead of attaching to a process with --pid, you can also specify the path to executable directly.
That is useful if you want to capture perf data for a test or a micro-benchmark.