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39 lines
857 B
Go
39 lines
857 B
Go
package header
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import "netstack/tcpip"
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const (
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udpSrcPort = 0
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udpDstPort = 2
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udpLength = 4
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udpChecksum = 6
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)
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// UDPFields contains the fields of a UDP packet. It is used to describe the
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// fields of a packet that needs to be encoded.
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// udp 首部字段
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type UDPFields struct {
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// SrcPort is the "source port" field of a UDP packet.
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SrcPort uint16
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// DstPort is the "destination port" field of a UDP packet.
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DstPort uint16
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// Length is the "length" field of a UDP packet.
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Length uint16
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// Checksum is the "checksum" field of a UDP packet.
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Checksum uint16
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}
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// UDP represents a UDP header stored in a byte array.
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type UDP []byte
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const (
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// UDPMinimumSize is the minimum size of a valid UDP packet.
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UDPMinimumSize = 8
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// UDPProtocolNumber is UDP's transport protocol number.
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UDPProtocolNumber tcpip.TransportProtocolNumber = 17
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)
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