niko
53 lines
2.8 KiB
C#
53 lines
2.8 KiB
C#
using Microsoft.AspNetCore.Mvc;
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using Campus_live_rewrite.api.server;
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namespace Campus_live_rewrite.Controllers
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{
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/// <summary>
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/// CampusNet's room-chat check (CampusNet Services/ChatGuard.cs). Room chat crosses the game
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/// server as RPC event 36 carrying "<noparse>text</noparse>"; a normal client has
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/// already run that text through POST /api/sanitize/v1, so it arrives masked. Text our filter
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/// WOULD still change therefore never went through it - chat-prompt text echoed into chat by a
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/// circuit, or a client that skips the filter (seen live: a slur in plain text, 2026-09-26).
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/// Answers "bypass" for such text (CampusNet then drops the message) and disconnects the sender
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/// with a timeout (AutoEnforce). Local callers only, like /photon/placement: loopback and no
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/// X-Forwarded-For, i.e. not a request the public proxy passed on.
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/// </summary>
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public class ChatGuardController : ControllerBase
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{
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[HttpPost("/photon/chatguard")]
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public IActionResult Check()
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{
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var ip = HttpContext.Connection.RemoteIpAddress;
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bool local = ip != null && System.Net.IPAddress.IsLoopback(ip)
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&& string.IsNullOrEmpty(Request.Headers["X-Forwarded-For"].ToString());
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if (!local) return NotFound();
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string id = "", room = "", text = "";
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try
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{
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if (Request.HasFormContentType)
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{
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id = Request.Form["id"].ToString();
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room = Request.Form["room"].ToString();
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text = Request.Form["text"].ToString();
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}
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}
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catch { }
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if (!ulong.TryParse(id, out var playerId) || string.IsNullOrEmpty(text)) return Content("ok", "text/plain");
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if (ConfigCampus.AllowSwears || !ConfigCampus.ChatBypassEnforce) return Content("ok", "text/plain");
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// Would our own filter change it? A legit client's text is already filtered, so
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// filtering it again changes nothing.
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string filtered = Campus_live_rewrite.api.server.Classes.Sanitize.SanitizeMessage(text, '*');
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if (filtered == text) return Content("ok", "text/plain");
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Console.WriteLine($"[chat-guard] {playerId} sent unfiltered chat in '{room}': \"{text}\" (filtered: \"{filtered}\") - dropped");
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AutoEnforce.DisconnectAndTimeout(playerId, Moderation_Detail.ReportCategory.Harassment, ConfigCampus.ChatBypassTimeoutSeconds,
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"Disconnected and timed out: you sent chat that skipped the chat filter.",
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$"chat filter bypass in '{room}': \"{(text.Length > 200 ? text[..200] + "..." : text)}\"");
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return Content("bypass", "text/plain");
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}
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}
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}
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