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Refactor and add tests

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This commit is contained in:
Bolke de Bruin
2020-08-01 15:50:13 +02:00
parent ecfa9e6cf4
commit 4e99b4e88f
4 changed files with 119 additions and 31 deletions
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32
protocol/server.go
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@@ -148,7 +148,7 @@ func (s *Server) Process(ctx context.Context) error {
// Make sure to start the flow from the RDP server first otherwise connections
// might hang eventually
go s.sendDataPacket()
go forward(s.Remote, s.Session.TransportOut)
s.State = SERVER_STATE_CHANNEL_CREATE
case PKT_TYPE_DATA:
if s.State < SERVER_STATE_CHANNEL_CREATE {
@@ -156,7 +156,7 @@ func (s *Server) Process(ctx context.Context) error {
return errors.New("wrong state")
}
s.State = SERVER_STATE_OPENED
s.forwardDataPacket(pkt)
receive(pkt, s.Remote)
case PKT_TYPE_KEEPALIVE:
// keepalives can be received while the channel is not open yet
if s.State < SERVER_STATE_CHANNEL_CREATE {
@@ -357,34 +357,6 @@ func (s *Server) channelResponse() []byte {
return createPacket(PKT_TYPE_CHANNEL_RESPONSE, buf.Bytes())
}
func (s *Server) forwardDataPacket(data []byte) {
buf := bytes.NewReader(data)
var cblen uint16
binary.Read(buf, binary.LittleEndian, &cblen)
pkt := make([]byte, cblen)
binary.Read(buf, binary.LittleEndian, &pkt)
s.Remote.Write(pkt)
}
func (s *Server) sendDataPacket() {
defer s.Remote.Close()
b1 := new(bytes.Buffer)
buf := make([]byte, 4086)
for {
n, err := s.Remote.Read(buf)
binary.Write(b1, binary.LittleEndian, uint16(n))
if err != nil {
log.Printf("Error reading from conn %s", err)
break
}
b1.Write(buf[:n])
s.Session.TransportOut.WritePacket(createPacket(PKT_TYPE_DATA, b1.Bytes()))
b1.Reset()
}
}
func makeRedirectFlags(flags RedirectFlags) int {
var redir = 0