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add lneto.Validator type for frame validation

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soypat
2025-01-16 21:25:37 -03:00
parent 0290940e1b
commit 93d1f80015
5 changed files with 188 additions and 62 deletions
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frames.go
+8 -3
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@@ -111,6 +111,12 @@ func (efrm EthFrame) DestinationHardwareAddr() (dst *[6]byte) {
return (*[6]byte)(efrm.buf[0:6])
}
// IsBroadcast returns true if the destination is the broadcast address ff:ff:ff:ff:ff:ff, false otherwise.
func (efrm EthFrame) IsBroadcast() bool {
return efrm.buf[0] == 0xff && efrm.buf[1] == 0xff && efrm.buf[2] == 0xff &&
efrm.buf[3] == 0xff && efrm.buf[4] == 0xff && efrm.buf[5] == 0xff
}
// SourceHardwareAddr returns the sender's MAC/hardware address of the ethernet packet.
func (efrm EthFrame) SourceHardwareAddr() (src *[6]byte) {
return (*[6]byte)(efrm.buf[6:12])
@@ -267,9 +273,8 @@ func (ifrm IPv4Frame) HeaderLength() int {
return int(ifrm.ihl()) * 4
}
func (ifrm IPv4Frame) ihl() uint8 {
return ifrm.buf[0] & 0xf
}
func (ifrm IPv4Frame) ihl() uint8 { return ifrm.buf[0] & 0xf }
func (ifrm IPv4Frame) version() uint8 { return ifrm.buf[0] >> 4 }
// VersionAndIHL returns the version and IHL fields in the IPv4 header. Version should always be 4.
func (ifrm IPv4Frame) VersionAndIHL() (version, IHL uint8) {