niko
37 lines
2.0 KiB
C#
37 lines
2.0 KiB
C#
namespace CampusNet.Services;
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/// <summary>
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/// Any logged-in client can join a Photon room by NAME - nothing checks that the Campus server
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/// actually put them there, so a player who learns a room name can walk into a private room or
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/// dorm past invites, room bans and the junior filter. Enforcing that blind could lock people out
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/// of legitimate joins (event broadcasts, reconnects, party follow), so this first runs in LOG-ONLY
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/// mode: after each join it asks the Campus server (localhost only) which Photon room the player was
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/// matchmade into and warns on a mismatch. Once the log shows no false alarms, set
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/// CAMPUSNET_ENFORCE_JOINS=1 to refuse them.
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/// </summary>
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public static class JoinCheck
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{
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private static readonly string Url = Environment.GetEnvironmentVariable("CAMPUSNET_PLACEMENT_URL") ?? "http://127.0.0.1:8080/photon/placement";
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public static readonly bool Enforce = Environment.GetEnvironmentVariable("CAMPUSNET_ENFORCE_JOINS") == "1";
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private static readonly HttpClient Http = new() { Timeout = TimeSpan.FromSeconds(2) };
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/// <summary>The Photon room the Campus server placed this player in ("" = none known, null = lookup failed).</summary>
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public static async Task<string?> PlacementOf(string userId)
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{
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try { return (await Http.GetStringAsync($"{Url}?id={Uri.EscapeDataString(userId)}")).Trim(); }
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catch { return null; }
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}
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public static void Observe(string? userId, string room, string tag)
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{
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if (string.IsNullOrEmpty(userId) || !ulong.TryParse(userId, out _)) return;
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_ = Task.Run(async () =>
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{
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var placed = await PlacementOf(userId);
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if (placed == null) return; // Campus unreachable: say nothing rather than cry wolf
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if (!string.Equals(placed, room, StringComparison.Ordinal))
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Log.Warn($"[joincheck] {tag} u{userId} joined '{room}' but Campus placed them in '{(placed.Length == 0 ? "(nowhere)" : placed)}'{(Enforce ? "" : " (log only)")}");
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});
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}
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}
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