57 lines
1.3 KiB
Go
57 lines
1.3 KiB
Go
package handshake
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import (
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"bytes"
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"errors"
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"fmt"
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"github.com/quic-go/quic-go/internal/wire"
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"github.com/quic-go/quic-go/quicvarint"
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)
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const sessionTicketRevision = 5
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type sessionTicket struct {
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Parameters *wire.TransportParameters
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}
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func (t *sessionTicket) Marshal() []byte {
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b := make([]byte, 0, 256)
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b = quicvarint.Append(b, sessionTicketRevision)
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return t.Parameters.MarshalForSessionTicket(b)
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}
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func (t *sessionTicket) Unmarshal(b []byte) error {
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rev, l, err := quicvarint.Parse(b)
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if err != nil {
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return errors.New("failed to read session ticket revision")
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}
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b = b[l:]
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if rev != sessionTicketRevision {
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return fmt.Errorf("unknown session ticket revision: %d", rev)
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}
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var tp wire.TransportParameters
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if err := tp.UnmarshalFromSessionTicket(b); err != nil {
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return fmt.Errorf("unmarshaling transport parameters from session ticket failed: %s", err.Error())
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}
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t.Parameters = &tp
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return nil
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}
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const extraPrefix = "quic-go1"
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func addSessionStateExtraPrefix(b []byte) []byte {
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return append([]byte(extraPrefix), b...)
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}
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func findSessionStateExtraData(extras [][]byte) []byte {
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prefix := []byte(extraPrefix)
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for _, extra := range extras {
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if len(extra) < len(prefix) || !bytes.Equal(prefix, extra[:len(prefix)]) {
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continue
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}
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return extra[len(prefix):]
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}
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return nil
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}
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