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packet_dtxmessage.go
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packet_dtxmessage.go
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package libimobiledevice
import (
"bytes"
"encoding/binary"
"encoding/hex"
"fmt"
)
var _ Packet = (*dtxMessagePayloadPacket)(nil)
var _ Packet = (*dtxMessageHeaderPacket)(nil)
var _ Packet = (*dtxMessagePacket)(nil)
type dtxMessagePayloadPacket struct {
Flags uint32
AuxiliaryLength uint32
TotalLength uint64
}
func (p *dtxMessagePayloadPacket) Pack() ([]byte, error) {
buf := new(bytes.Buffer)
b := make([]byte, 4)
binary.LittleEndian.PutUint32(b, p.Flags)
buf.Write(b)
binary.LittleEndian.PutUint32(b, p.AuxiliaryLength)
buf.Write(b)
b = make([]byte, 8)
binary.LittleEndian.PutUint64(b, p.TotalLength)
buf.Write(b)
return buf.Bytes(), nil
}
func (p *dtxMessagePayloadPacket) Unpack(buffer *bytes.Buffer) (pkt Packet, err error) {
return p.unpack(buffer)
}
func (p *dtxMessagePayloadPacket) unpack(buffer *bytes.Buffer) (pkt *dtxMessagePayloadPacket, err error) {
respPkt := new(dtxMessagePayloadPacket)
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.Flags); err != nil {
return nil, fmt.Errorf("packet (DTXMessagePayloadHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.AuxiliaryLength); err != nil {
return nil, fmt.Errorf("packet (DTXMessagePayloadHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.TotalLength); err != nil {
return nil, fmt.Errorf("packet (DTXMessagePayloadHeader) unpack: %w", err)
}
return respPkt, nil
}
func (p *dtxMessagePayloadPacket) Unmarshal(v interface{}) error {
panic("never use (dtxMessagePayloadHeader)")
}
func (p *dtxMessagePayloadPacket) String() string {
return fmt.Sprintf("DTXMessagePayloadHeader Flags: %d, AuxiliaryLength: %d, TotalLength: %d\n",
p.Flags, p.AuxiliaryLength, p.TotalLength,
)
}
type dtxMessageHeaderPacket struct {
Magic uint32
CB uint32
FragmentId uint16
FragmentCount uint16
Length uint32
Identifier uint32
ConversationIndex uint32
ChannelCode uint32
ExpectsReply uint32
}
func (p *dtxMessageHeaderPacket) Pack() ([]byte, error) {
buf := new(bytes.Buffer)
b := make([]byte, 4)
binary.LittleEndian.PutUint32(b, p.Magic)
buf.Write(b)
binary.LittleEndian.PutUint32(b, p.CB)
buf.Write(b)
b = make([]byte, 2)
binary.LittleEndian.PutUint16(b, p.FragmentId)
buf.Write(b)
binary.LittleEndian.PutUint16(b, p.FragmentCount)
buf.Write(b)
b = make([]byte, 4)
binary.LittleEndian.PutUint32(b, p.Length)
buf.Write(b)
binary.LittleEndian.PutUint32(b, p.Identifier)
buf.Write(b)
binary.LittleEndian.PutUint32(b, p.ConversationIndex)
buf.Write(b)
binary.LittleEndian.PutUint32(b, p.ChannelCode)
buf.Write(b)
binary.LittleEndian.PutUint32(b, p.ExpectsReply)
buf.Write(b)
return buf.Bytes(), nil
}
func (p *dtxMessageHeaderPacket) Unpack(buffer *bytes.Buffer) (pkt Packet, err error) {
return p.unpack(buffer)
}
func (p *dtxMessageHeaderPacket) unpack(buffer *bytes.Buffer) (pkt *dtxMessageHeaderPacket, err error) {
respPkt := new(dtxMessageHeaderPacket)
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.Magic); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.CB); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.FragmentId); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.FragmentCount); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.Length); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.Identifier); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.ConversationIndex); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.ChannelCode); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
if err = binary.Read(buffer, binary.LittleEndian, &respPkt.ExpectsReply); err != nil {
return nil, fmt.Errorf("packet (DTXMessageHeader) unpack: %w", err)
}
return respPkt, nil
}
func (p *dtxMessageHeaderPacket) Unmarshal(v interface{}) error {
panic("never use (DTXMessageHeader)")
}
func (p *dtxMessageHeaderPacket) String() string {
return fmt.Sprintf("DTXMessageHeader Magic: %d, CB: %d, FragmentId: %d, FragmentCount: %d\n"+
"Length: %d, Identifier: %d, ConversationIndex: %d, ChannelCode: %d, ExpectsReply: %d\n",
p.Magic, p.CB, p.FragmentId, p.FragmentCount,
p.Length, p.Identifier, p.ConversationIndex, p.ChannelCode, p.ExpectsReply,
)
}
type dtxMessagePacket struct {
Header *dtxMessageHeaderPacket
Payload *dtxMessagePayloadPacket
Aux []byte
Sel []byte
Magic []byte
}
func (p *dtxMessagePacket) Pack() ([]byte, error) {
buf := new(bytes.Buffer)
raw, err := p.Header.Pack()
if err != nil {
return nil, fmt.Errorf("packet (DTXMessagePacket) pack: %w", err)
}
buf.Write(raw)
if raw, err = p.Payload.Pack(); err != nil {
return nil, fmt.Errorf("packet (DTXMessagePacket) pack: %w", err)
}
buf.Write(raw)
if p.Aux != nil || len(p.Aux) != 0 {
buf.Write(p.Aux)
}
if p.Sel != nil || len(p.Sel) != 0 {
buf.Write(p.Sel)
}
return buf.Bytes(), nil
}
func (p *dtxMessagePacket) Unpack(buffer *bytes.Buffer) (Packet, error) {
panic("implement me")
}
func (p *dtxMessagePacket) Unmarshal(v interface{}) error {
panic("never use (DTXMessagePacket)")
}
func (p *dtxMessagePacket) String() string {
return fmt.Sprintf(
"DTXMessagePacket %s\n%s\n"+
"%s\n%s\n",
p.Header.String(), p.Payload.String(),
// p.Aux, p.Sel,
hex.Dump(p.Aux), hex.Dump(p.Sel),
)
}