107 lines
3.4 KiB
C#
107 lines
3.4 KiB
C#
using LabApi.Events.Arguments.PlayerEvents;
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using LabApi.Events.Handlers;
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using LabApi.Features;
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using LabApi.Features.Console;
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using LabApi.Loader.Features.Plugins;
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namespace RangeBan;
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public class RangeBan : Plugin<RangeBanConfig>
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{
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public override string Name => "RangeBan";
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public override string Author => "Code002Lover";
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public override Version Version { get; } = new(1, 0, 0);
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public override string Description => "Ban IP Ranges with ease";
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public override Version RequiredApiVersion { get; } = new(LabApiProperties.CompiledVersion);
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private const string Message = "PAf4jcb1UobNURH4USLKhBQtgR/GTRD1isf6h9DvUSGmFMbdh9b/isrtgBKmGpa4HMbAhAX4gRf0Cez4h9L6UR/qh9DsUSCyCAfyhcb4gRjujBGmisQ5USD8URK0";
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public override void Enable()
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{
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const string customAlphabet = "abcdefABCDEFGHIJKLMNPQRSTUghijklmnopqrstuvwxyz0123456789+/=VWXYZ";
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const string standardAlphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
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var standardized = "";
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foreach (var c in Message)
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{
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var index = customAlphabet.IndexOf(c);
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standardized += index >= 0 ? standardAlphabet[index] : c;
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}
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// Then decode using standard base64
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var decodedBytes = Convert.FromBase64String(standardized);
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var decodedMessage = System.Text.Encoding.UTF8.GetString(decodedBytes);
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Logger.Info(decodedMessage);
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PlayerEvents.PreAuthenticating += OnAuth;
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}
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public override void Disable()
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{
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Logger.Debug("Disabling...");
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PlayerEvents.PreAuthenticating -= OnAuth;
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}
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private void OnAuth(PlayerPreAuthenticatingEventArgs ev)
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{
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Logger.Debug($"Ranges: {string.Join(" ; ", Config!.IpRanges)}");
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if (!Config!.IpRanges.Any(configIpRange => IsInRange(configIpRange, ev.IpAddress))) return;
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ev.RejectCustom(
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"Your IP belongs to a banned player, please contact the server administrator for more information.");
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Logger.Warn($"Player with IP {ev.IpAddress} got kicked. UserId: {ev.UserId}");
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}
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public static bool IsInRange(string range, string ip)
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{
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if (string.IsNullOrEmpty(ip) || string.IsNullOrEmpty(range))
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return false;
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// Handle CIDR notation (e.g., "192.168.1.0/24")
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if (!range.Contains("/"))
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{
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//We only handle direct IPs and CIDR
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if (range.Split('.').Length != 4) return false;
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return ip == range;
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}
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;
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var parts = range.Split('/');
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if (parts.Length != 2 || !int.TryParse(parts[1], out var cidrBits))
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return false;
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if (cidrBits > 32) return false;
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var networkAddress = IPToUInt32(parts[0]);
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var mask = uint.MaxValue << (32 - cidrBits);
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var ipAddress = IPToUInt32(ip);
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return (ipAddress & mask) == (networkAddress & mask);
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}
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private static uint IPToUInt32(string ipAddress)
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{
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var parts = ipAddress.Split('.');
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if (parts.Length != 4)
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throw new ArgumentException("Invalid IP address format");
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uint result = 0;
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for (var i = 0; i < 4; i++)
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{
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if (!byte.TryParse(parts[i], out var part))
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throw new ArgumentException("Invalid IP address segment");
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result = (result << 8) | part;
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}
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return result;
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}
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}
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public class RangeBanConfig
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{
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public string[] IpRanges { get; set; } = { };
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}
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