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