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https://github.com/KusakabeShi/EtherGuard-VPN.git
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49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
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/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
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*/
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package tap
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import (
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"bytes"
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)
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type Event int
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type MacAddress [6]uint8
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func GetDstMacAddr(packet []byte) (dstMacAddr MacAddress) {
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copy(dstMacAddr[:], packet[0:6])
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return
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}
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func GetSrcMacAddr(packet []byte) (srcMacAddr MacAddress) {
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copy(srcMacAddr[:], packet[6:12])
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return
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}
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func IsBoardCast(mac_in MacAddress) bool {
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if bytes.Equal(mac_in[:], []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}) {
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return true
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} else if bytes.Equal(mac_in[0:2], []byte{0x33, 0x33}) {
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return true
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}
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return false
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}
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const (
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EventUp = 1 << iota
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EventDown
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EventMTUUpdate
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)
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type Device interface {
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Read([]byte, int) (int, error) // read a packet from the device (without any additional headers)
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Write([]byte, int) (int, error) // writes a packet to the device (without any additional headers)
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Flush() error // flush all previous writes to the device
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MTU() (int, error) // returns the MTU of the device
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Name() (string, error) // fetches and returns the current name
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Events() chan Event // returns a constant channel of events related to the device
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Close() error // stops the device and closes the event channel
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}
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