Simple C# application displaying active Steam P2P connection info, namely SteamID / ping / connection quality. This was specifically made with Elden Ring in mind, but it should work for any game that groups peers in the same session using SteamMatchmaking lobbies. Also comes with a customizable overlay (windowed / borderless mode only!) and logging.
It also supports adding peers to the Steam recent players list, if the game does not support this (like Elden Ring).
Download the lastest release from the Releases tab and extract the ZIP file in any folder on your computer. Once the game is running, start SteamP2PInfo.exe and click on "Attach Game". Select the appropriate game window in the dialog. If this game has never been opened before, you will be prompted to enter the game's Steam AppId. This can be queried on websites like steamdb. The Steam console will then open. You must enter the following command in the console for the tool to work: log_ipc IClientMatchmaking. The program should now be ready! You can then go in the "Config" tab to customize game-specific settings.
This is due to the very naive Steam IPC log file parsing. The program can "miss" a Steam lobby, preventing the detection of P2P peers in this lobby. I plan to improve the log file parsing to make this rarer or completely eliminate it in the future.
I'm not sure what the cause for this is yet. Please modify the "X Offset" and "Y Offset" settings directly for now.
Not really an issue, but I plan to implement a GUI editor for this in the future. For now the colors can be changed by directly editing the game's json configuration file.
While the SteamNetworkingMessages API provides detailed connection information, the old API SteamNetworking does not do this. Hence in this the pings are computed by monitoring STUN packets that are sent to and recieved from the players' IPs. To capture these packets I use Event Tracing for Windows (ETW), which requires administrator privileges for "kernel" events like networking.
Why do I have to use the Steam console / IPC logging? Isn't there an cleaner way to monitor lobbies?
Sadly, this is the only way I found to reliably detect lobby joining and creation when running two processes using the same game ID. I cannot use Steam callbacks, because if the game "consumes" them my tool's callbacks will not be called, and vice versa. I also do not want to rely on reading game memory or injecting code into the game in order to support anti-cheat protected games. If there is a cleaner way to do this without touching the game process, please tell me.
When a peer is connected using the SteamNetworkingMessages API, this roughly corresponds to 1 - packet_loss. When connected using the deprecated API SteamNetworking, the value is computed using the formula 1 / (0.01 * jitter + 1), where jitter is the standard deviation of the last 10 ping values. This is done instead of showing jitter directly so that the value is on the same scale as the SteamNetworkingMessages one.
Since the tool is loaded with the game's Steam AppId, letting the program run after the game closes would make Steam think the game is still running. Calling SteamAPI_Shutdown does not seem to fix the problem, so we have to close the process.
Feel free to open an issue on this Github or direct message me on discord at tremwil#3713.
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