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snltty
2025-09-24 20:19:20 +08:00
parent 5e20069672
commit 6f19af76c0
12 changed files with 65 additions and 76 deletions
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14
src/linker.libs/ChecksumHelper.cs
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@@ -5,6 +5,17 @@ namespace linker.libs
{
public sealed class ChecksumHelper
{
public static unsafe void ClearChecksum(ReadOnlyMemory<byte> packet, bool ipHeader = true, bool payload = true)
{
ClearChecksum(packet.Span, ipHeader, payload);
}
public static unsafe void ClearChecksum(ReadOnlySpan<byte> packet, bool ipHeader = true, bool payload = true)
{
fixed (byte* ptr = packet)
{
ClearChecksum(ptr, ipHeader, payload);
}
}
/// <summary>
/// 清空IP包的校验和
/// </summary>
@@ -70,7 +81,7 @@ namespace linker.libs
{
byte ipHeaderLength = (byte)((*ptr & 0b1111) * 4);
byte* packetPtr = ptr + ipHeaderLength;
ipHeader = ipHeader && *(ushort*)(ptr + 10) == 0;
payload = payload && ((ProtocolType)(*(ptr + 9)) switch
{
@@ -79,6 +90,7 @@ namespace linker.libs
ProtocolType.Udp => *(ushort*)(packetPtr + 6) == 0,
_ => false,
});
if (ipHeader || payload)
Checksum(ptr, ipHeader, payload);
}