47 lines
1.5 KiB
C#
47 lines
1.5 KiB
C#
using System.Net;
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using System.Net.Sockets;
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namespace MoShiro.Protocol;
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/// <summary>哪些地址算「公网上能拨进来的地址」：Agent 上报本机地址和面板自动识别共用同一套判断。</summary>
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public static class PublicAddress
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{
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public static bool IsPublicIpv4(IPAddress address)
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{
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if (address.AddressFamily != AddressFamily.InterNetwork)
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{
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return false;
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}
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byte[] b = address.GetAddressBytes();
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return !(b[0] is 0 or 10 or 127 or >= 224
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|| (b[0] == 100 && b[1] is >= 64 and <= 127)
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|| (b[0] == 169 && b[1] == 254)
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|| (b[0] == 172 && b[1] is >= 16 and <= 31)
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|| (b[0] == 192 && b[1] == 168)
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|| (b[0] == 192 && b[1] == 0 && b[2] is 0 or 2)
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|| (b[0] == 198 && b[1] is 18 or 19)
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|| (b[0] == 198 && b[1] == 51 && b[2] == 100)
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|| (b[0] == 203 && b[1] == 0 && b[2] == 113));
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}
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public static bool IsGlobalIpv6(IPAddress address)
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{
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if (address.AddressFamily != AddressFamily.InterNetworkV6 || address.IsIPv4MappedToIPv6)
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{
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return false;
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}
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byte[] b = address.GetAddressBytes();
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if ((b[0] & 0xE0) != 0x20)
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{
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return false;
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}
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// 2001:db8::/32 文档、2002::/16 6to4、2001::/32 Teredo
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return !((b[0] == 0x20 && b[1] == 0x01 && b[2] == 0x0d && b[3] == 0xb8)
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|| (b[0] == 0x20 && b[1] == 0x02)
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|| (b[0] == 0x20 && b[1] == 0x01 && b[2] == 0 && b[3] == 0));
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}
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}
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