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73 lines
1.5 KiB
73 lines
1.5 KiB
4 months ago
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package http2interop
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import (
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"encoding/binary"
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"fmt"
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"io"
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)
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type GoAwayFrame struct {
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Header FrameHeader
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Reserved
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StreamID
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// TODO(carl-mastrangelo): make an enum out of this.
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Code uint32
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Data []byte
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}
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func (f *GoAwayFrame) GetHeader() *FrameHeader {
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return &f.Header
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}
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func (f *GoAwayFrame) ParsePayload(r io.Reader) error {
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raw := make([]byte, f.Header.Length)
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if _, err := io.ReadFull(r, raw); err != nil {
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return err
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}
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return f.UnmarshalPayload(raw)
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}
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func (f *GoAwayFrame) UnmarshalPayload(raw []byte) error {
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if f.Header.Length != len(raw) {
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return fmt.Errorf("Invalid Payload length %d != %d", f.Header.Length, len(raw))
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}
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if f.Header.Length < 8 {
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return fmt.Errorf("Invalid Payload length %d", f.Header.Length)
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}
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*f = GoAwayFrame{
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Reserved: Reserved(raw[0]>>7 == 1),
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StreamID: StreamID(binary.BigEndian.Uint32(raw[0:4]) & 0x7fffffff),
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Code: binary.BigEndian.Uint32(raw[4:8]),
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Data: []byte(string(raw[8:])),
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}
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return nil
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}
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func (f *GoAwayFrame) MarshalPayload() ([]byte, error) {
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raw := make([]byte, 8, 8+len(f.Data))
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binary.BigEndian.PutUint32(raw[:4], uint32(f.StreamID))
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binary.BigEndian.PutUint32(raw[4:8], f.Code)
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raw = append(raw, f.Data...)
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return raw, nil
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}
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func (f *GoAwayFrame) MarshalBinary() ([]byte, error) {
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payload, err := f.MarshalPayload()
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if err != nil {
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return nil, err
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}
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f.Header.Length = len(payload)
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f.Header.Type = GoAwayFrameType
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header, err := f.Header.MarshalBinary()
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if err != nil {
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return nil, err
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}
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header = append(header, payload...)
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return header, nil
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}
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