vendor.github.com.pion.dtls.v2.flighthandler.go Maven / Gradle / Ivy
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// SPDX-FileCopyrightText: 2023 The Pion community
// SPDX-License-Identifier: MIT
package dtls
import (
"context"
"github.com/pion/dtls/v2/pkg/protocol/alert"
)
// Parse received handshakes and return next flightVal
type flightParser func(context.Context, flightConn, *State, *handshakeCache, *handshakeConfig) (flightVal, *alert.Alert, error)
// Generate flights
type flightGenerator func(flightConn, *State, *handshakeCache, *handshakeConfig) ([]*packet, *alert.Alert, error)
func (f flightVal) getFlightParser() (flightParser, error) {
switch f {
case flight0:
return flight0Parse, nil
case flight1:
return flight1Parse, nil
case flight2:
return flight2Parse, nil
case flight3:
return flight3Parse, nil
case flight4:
return flight4Parse, nil
case flight4b:
return flight4bParse, nil
case flight5:
return flight5Parse, nil
case flight5b:
return flight5bParse, nil
case flight6:
return flight6Parse, nil
default:
return nil, errInvalidFlight
}
}
func (f flightVal) getFlightGenerator() (gen flightGenerator, retransmit bool, err error) {
switch f {
case flight0:
return flight0Generate, true, nil
case flight1:
return flight1Generate, true, nil
case flight2:
// https://tools.ietf.org/html/rfc6347#section-3.2.1
// HelloVerifyRequests must not be retransmitted.
return flight2Generate, false, nil
case flight3:
return flight3Generate, true, nil
case flight4:
return flight4Generate, true, nil
case flight4b:
return flight4bGenerate, true, nil
case flight5:
return flight5Generate, true, nil
case flight5b:
return flight5bGenerate, true, nil
case flight6:
return flight6Generate, true, nil
default:
return nil, false, errInvalidFlight
}
}