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// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
// SPDX-License-Identifier: MIT
package extension
import "encoding/binary"
const (
renegotiationInfoHeaderSize = 5
)
// RenegotiationInfo allows a Client/Server to
// communicate their renegotation support
//
// https://tools.ietf.org/html/rfc5746
type RenegotiationInfo struct {
RenegotiatedConnection uint8
}
// TypeValue returns the extension TypeValue.
func (r RenegotiationInfo) TypeValue() TypeValue {
return RenegotiationInfoTypeValue
}
// Marshal encodes the extension.
func (r *RenegotiationInfo) Marshal() ([]byte, error) {
out := make([]byte, renegotiationInfoHeaderSize)
binary.BigEndian.PutUint16(out, uint16(r.TypeValue()))
binary.BigEndian.PutUint16(out[2:], uint16(1)) // length
out[4] = r.RenegotiatedConnection
return out, nil
}
// Unmarshal populates the extension from encoded data.
func (r *RenegotiationInfo) Unmarshal(data []byte) error {
if len(data) < renegotiationInfoHeaderSize {
return errBufferTooSmall
} else if TypeValue(binary.BigEndian.Uint16(data)) != r.TypeValue() {
return errInvalidExtensionType
}
r.RenegotiatedConnection = data[4]
return nil
}
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