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fix: set TTL for incoming UDP IP packets from TUN with PacketAddr dispatcher #2732

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merged 1 commit into from Nov 1, 2023
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fix: set TTL for incoming UDP IP packets from TUN with PacketAddr dispatcher #2732

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2 changes: 2 additions & 0 deletions app/tun/packetparse/udp.go
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Expand Up @@ -78,6 +78,7 @@ func constructIPv4UDPPacket(src, dst net.Destination, data []byte) ([]byte, erro
Protocol: layers.IPProtocolUDP,
SrcIP: src.Address.IP(),
DstIP: dst.Address.IP(),
TTL: 64, // set TTL to a reasonable non-zero value to allow non-local routing
}
udp := &layers.UDP{
SrcPort: layers.UDPPort(src.Port),
Expand All @@ -103,6 +104,7 @@ func constructIPv6UDPPacket(src, dst net.Destination, data []byte) ([]byte, erro
NextHeader: layers.IPProtocolUDP,
SrcIP: src.Address.IP(),
DstIP: dst.Address.IP(),
HopLimit: 64,
}
udp := &layers.UDP{
SrcPort: layers.UDPPort(src.Port),
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