55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
package pdu
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import "encoding/binary"
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type (
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PDU interface {
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EncodeInto(*[]uint8)
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Encode() []uint8
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Decode([]uint8)
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Size() uint32
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}
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PDU_HEADER struct {
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command_length uint32
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command_id uint32
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command_status uint32
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sequence_number uint32
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}
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GENERIC_NACK struct {
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PDU_HEADER
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}
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)
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func (p *PDU_HEADER) Encode() []uint8 {
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buf := make([]uint8, 16)
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binary.BigEndian.PutUint32(buf[0:4], p.command_length)
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binary.BigEndian.PutUint32(buf[4:8], p.command_id)
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binary.BigEndian.PutUint32(buf[8:12], p.command_status)
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binary.BigEndian.PutUint32(buf[12:16], p.sequence_number)
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return buf
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}
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func (p *PDU_HEADER) EncodeInto(buf *[]uint8) {
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bufVal := *buf
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binary.BigEndian.PutUint32(bufVal[0:4], p.command_length)
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binary.BigEndian.PutUint32(bufVal[4:8], p.command_id)
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binary.BigEndian.PutUint32(bufVal[8:12], p.command_status)
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binary.BigEndian.PutUint32(bufVal[12:16], p.sequence_number)
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}
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func (p *PDU_HEADER) Decode(data []uint8) {
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if len(data) >= 4 {
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p.command_length = binary.BigEndian.Uint32(data[0:4])
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}
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if len(data) >= 8 {
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p.command_id = binary.BigEndian.Uint32(data[4:8])
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}
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if len(data) >= 12 {
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p.command_status = binary.BigEndian.Uint32(data[8:12])
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}
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if len(data) >= 16 {
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p.sequence_number = binary.BigEndian.Uint32(data[12:16])
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}
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}
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