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兼容ipv6

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This commit is contained in:
老九 2021-09-17 22:11:38 +08:00
parent 8c752000c5
commit a568a05bf7
1 changed files with 14 additions and 4 deletions
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18
FastGithub.Dns/DnsInterceptor.cs
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@ -126,10 +126,20 @@ namespace FastGithub.Dns
packetLength += (uint)responsePayload.Length - packet.PacketPayloadLength;
// 修改ip包
var destAddress = packet.IPv4Header->DstAddr;
packet.IPv4Header->DstAddr = packet.IPv4Header->SrcAddr;
packet.IPv4Header->SrcAddr = destAddress;
packet.IPv4Header->Length = BinaryPrimitives.ReverseEndianness((ushort)packetLength);
if (packet.IPv4Header != null)
{
var destAddress = packet.IPv4Header->DstAddr;
packet.IPv4Header->DstAddr = packet.IPv4Header->SrcAddr;
packet.IPv4Header->SrcAddr = destAddress;
packet.IPv4Header->Length = BinaryPrimitives.ReverseEndianness((ushort)packetLength);
}
else
{
var destAddress = packet.IPv6Header->DstAddr;
packet.IPv6Header->DstAddr = packet.IPv6Header->SrcAddr;
packet.IPv6Header->SrcAddr = destAddress;
packet.IPv6Header->Length = BinaryPrimitives.ReverseEndianness((ushort)packetLength);
}
// 修改udp包
var destPort = packet.UdpHeader->DstPort;