de3cfa35b1
Enforce a millions-strong external IP blocklist in-app so the OS firewall never has to hold it (Windows BFE can't). FileBlocklist loads a versioned file into an immutable SortedRangeIndex snapshot off the game loop (yields to world saves) and swaps it atomically; the accept path gates against it after the manual-ban check and, once per suppression window (PromotedGuard), promotes the hit to CrowdSec (scenario modernuo/blocklist) so the OS bouncer kernel-drops repeat traffic. The bulk list is produced entirely out-of-process. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
42 lines
1.9 KiB
C#
42 lines
1.9 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2026 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: BlocklistGate.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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using System.Net;
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namespace Server.Network.Bans.Blocklist;
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/// <summary>
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/// Pure accept-gate decision, isolated for testability. Allocation-free: no closures on the accept
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/// path. Returns true when the connection should be denied; <paramref name="shouldReport"/> indicates
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/// whether this hit should be contributed to the ban channel (once per <see cref="PromotedGuard"/> TTL).
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/// </summary>
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public static class BlocklistGate
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{
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public static bool Evaluate(
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IPAddress ip, bool whitelisted, PromotedGuard guard, long nowTicks,
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bool reportHits, long ttlMs, out bool shouldReport)
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{
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shouldReport = false;
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if (whitelisted || !FileBlocklist.IsBanned(ip))
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{
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return false; // pass
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}
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if (reportHits)
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{
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shouldReport = guard.TryMark(ip.ToUInt128(), nowTicks, ttlMs);
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}
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return true; // deny
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}
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}
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