80 lines
1.6 KiB
Go
80 lines
1.6 KiB
Go
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package frame
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import (
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"encoding/binary"
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"io"
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)
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var (
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order = binary.BigEndian
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)
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// BasicTransport can serialize/deserialize frames on an underlying
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// net.Conn to implement the muxado protocol.
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type BasicTransport struct {
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io.ReadWriteCloser
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Header
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RStreamSyn
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RStreamRst
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RStreamData
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RStreamWndInc
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RGoAway
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}
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// WriteFrame writes the given frame to the underlying transport
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func (t *BasicTransport) WriteFrame(frame WFrame) (err error) {
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// each frame knows how to write iteself to the framer
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err = frame.writeTo(t)
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return
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}
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// ReadFrame reads the next frame from the underlying transport
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func (t *BasicTransport) ReadFrame() (f RFrame, err error) {
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// read the header
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if _, err = io.ReadFull(t, []byte(t.Header)); err != nil {
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return nil, err
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}
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switch t.Header.Type() {
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case TypeStreamSyn:
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frame := &t.RStreamSyn
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frame.Header = t.Header
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err = frame.readFrom(t)
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return frame, err
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case TypeStreamRst:
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frame := &t.RStreamRst
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frame.Header = t.Header
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err = frame.readFrom(t)
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return frame, err
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case TypeStreamData:
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frame := &t.RStreamData
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frame.Header = t.Header
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err = frame.readFrom(t)
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return frame, err
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case TypeStreamWndInc:
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frame := &t.RStreamWndInc
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frame.Header = t.Header
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err = frame.readFrom(t)
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return frame, err
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case TypeGoAway:
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frame := &t.RGoAway
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frame.Header = t.Header
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err = frame.readFrom(t)
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return frame, err
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default:
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return nil, protoError("Illegal frame type: %d", t.Header.Type())
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}
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return
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}
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func NewBasicTransport(rwc io.ReadWriteCloser) *BasicTransport {
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trans := &BasicTransport{ReadWriteCloser: rwc, Header: make([]byte, headerSize)}
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return trans
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}
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