mirror of
https://github.com/yggdrasil-network/water.git
synced 2025-05-19 16:35:10 +03:00
38 lines
700 B
Go
38 lines
700 B
Go
package waterutil
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import (
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"net"
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)
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func IPv4DSCP(packet []byte) byte {
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return packet[1] >> 2
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}
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func IPv4ECN(packet []byte) byte {
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return packet[1] & 0x03
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}
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func IPv4Identification(packet []byte) [2]byte {
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return [2]byte{packet[4], packet[5]}
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}
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func IPv4TTL(packet []byte) byte {
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return packet[8]
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}
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func IPv4Protocol(packet []byte) IPProtocol {
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return IPProtocol(packet[9])
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}
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func IPv4Source(packet []byte) net.IP {
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return net.IPv4(packet[12], packet[13], packet[14], packet[15])
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}
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func IPv4Destination(packet []byte) net.IP {
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return net.IPv4(packet[16], packet[17], packet[18], packet[19])
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}
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func IPv4Payload(packet []byte) []byte {
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ihl := packet[0] & 0x0F
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return packet[ihl*4:]
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}
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