44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
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package rtmp
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import (
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"encoding/binary"
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"fmt"
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"github.com/sfiera/multitalk/pkg/ddp"
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)
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type ResponsePacket struct {
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SenderAddr ddp.Addr
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Extended bool
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RangeStart ddp.Network
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RangeEnd ddp.Network
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}
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func UnmarshalResponsePacket(data []byte) (*ResponsePacket, error) {
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if len(data) != 4 && len(data) != 10 {
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return nil, fmt.Errorf("invalid input length %d for RTMP Response packet", len(data))
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}
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if data[2] != 8 {
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return nil, fmt.Errorf("unsupported node ID length %d for RTMP Response packet", data[2])
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}
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rp := &ResponsePacket{
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SenderAddr: ddp.Addr{
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Network: ddp.Network(binary.BigEndian.Uint16(data[:2])),
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Node: ddp.Node(data[3]),
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},
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}
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if len(data) == 4 {
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return rp, nil
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}
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rp.RangeStart = ddp.Network(binary.BigEndian.Uint16(data[4:6]))
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if data[6] != 0x80 {
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return nil, fmt.Errorf("invalid intermediate byte %x for RTMP Response packet", data[6])
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}
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rp.RangeEnd = ddp.Network(binary.BigEndian.Uint16(data[7:9]))
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if data[9] != 0x82 {
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return nil, fmt.Errorf("unsupported version %x for RTMP Response packet", data[9])
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}
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return rp, nil
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}
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