mirror of
https://github.com/octoleo/syncthing.git
synced 2024-12-23 19:39:05 +00:00
dd92b2b8f4
- In the few places where we wrap errors, use the new Go 1.13 "%w" construction instead of %s or %v. - Where we create errors with constant strings, consistently use errors.New and not fmt.Errorf. - Remove capitalization from errors in the few places where we had that.
132 lines
3.0 KiB
Go
132 lines
3.0 KiB
Go
// Copyright (C) 2015 Audrius Butkevicius and Contributors (see the CONTRIBUTORS file).
|
|
|
|
package protocol
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
)
|
|
|
|
const (
|
|
magic = 0x9E79BC40
|
|
ProtocolName = "bep-relay"
|
|
)
|
|
|
|
var (
|
|
ResponseSuccess = Response{0, "success"}
|
|
ResponseNotFound = Response{1, "not found"}
|
|
ResponseAlreadyConnected = Response{2, "already connected"}
|
|
ResponseUnexpectedMessage = Response{100, "unexpected message"}
|
|
)
|
|
|
|
func WriteMessage(w io.Writer, message interface{}) error {
|
|
header := header{
|
|
magic: magic,
|
|
}
|
|
|
|
var payload []byte
|
|
var err error
|
|
|
|
switch msg := message.(type) {
|
|
case Ping:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypePing
|
|
case Pong:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypePong
|
|
case JoinRelayRequest:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypeJoinRelayRequest
|
|
case JoinSessionRequest:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypeJoinSessionRequest
|
|
case Response:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypeResponse
|
|
case ConnectRequest:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypeConnectRequest
|
|
case SessionInvitation:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypeSessionInvitation
|
|
case RelayFull:
|
|
payload, err = msg.MarshalXDR()
|
|
header.messageType = messageTypeRelayFull
|
|
default:
|
|
err = errors.New("unknown message type")
|
|
}
|
|
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
header.messageLength = int32(len(payload))
|
|
|
|
headerpayload, err := header.MarshalXDR()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = w.Write(append(headerpayload, payload...))
|
|
return err
|
|
}
|
|
|
|
func ReadMessage(r io.Reader) (interface{}, error) {
|
|
var header header
|
|
|
|
buf := make([]byte, header.XDRSize())
|
|
if _, err := io.ReadFull(r, buf); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if err := header.UnmarshalXDR(buf); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if header.magic != magic {
|
|
return nil, errors.New("magic mismatch")
|
|
}
|
|
|
|
buf = make([]byte, int(header.messageLength))
|
|
if _, err := io.ReadFull(r, buf); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
switch header.messageType {
|
|
case messageTypePing:
|
|
var msg Ping
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypePong:
|
|
var msg Pong
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypeJoinRelayRequest:
|
|
var msg JoinRelayRequest
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypeJoinSessionRequest:
|
|
var msg JoinSessionRequest
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypeResponse:
|
|
var msg Response
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypeConnectRequest:
|
|
var msg ConnectRequest
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypeSessionInvitation:
|
|
var msg SessionInvitation
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
case messageTypeRelayFull:
|
|
var msg RelayFull
|
|
err := msg.UnmarshalXDR(buf)
|
|
return msg, err
|
|
}
|
|
|
|
return nil, errors.New("unknown message type")
|
|
}
|