//alternative version
internal void TraceTransmissionEvent(SSH2PacketType pt, string message, params object[] args)
{
ISSHEventTracer t = _param.EventTracer;
if (t != null)
t.OnTranmission(pt.ToString(), String.Format(message, args));
}
private void OpenShellOrSubsystem(ISSHChannelEventReceiver receiver, SSH2PacketType pt, SSH2DataReader reader, string scheme)
{
if (_negotiationStatus == NegotiationStatus.WaitingChannelConfirmation) {
if (pt != SSH2PacketType.SSH_MSG_CHANNEL_OPEN_CONFIRMATION) {
if (pt != SSH2PacketType.SSH_MSG_CHANNEL_OPEN_FAILURE)
receiver.OnChannelError(new SSHException("opening channel failed; packet type=" + pt));
else {
int errcode = reader.ReadInt32();
string msg = reader.ReadUTF8String();
receiver.OnChannelError(new SSHException(msg));
}
// Close() shouldn't be called because remote channel number is not given yet.
// We just remove an event receiver from the collection of channels.
// FIXME: _negotiationStatus sould be set an error status ?
_connection.ChannelCollection.UnregisterChannelEventReceiver(_localID);
}
else {
_remoteID = reader.ReadInt32();
_allowedDataSize = reader.ReadUInt32();
_serverMaxPacketSize = reader.ReadInt32();
if (_type == ChannelType.Subsystem) {
OpenScheme(scheme);
_negotiationStatus = NegotiationStatus.WaitingSubsystemConfirmation;
}
else {
//open pty
SSHConnectionParameter param = _connection.Param;
Transmit(
0,
new SSH2Packet(SSH2PacketType.SSH_MSG_CHANNEL_REQUEST)
.WriteInt32(_remoteID)
.WriteString("pty-req")
.WriteBool(true)
.WriteString(param.TerminalName)
.WriteInt32(param.TerminalWidth)
.WriteInt32(param.TerminalHeight)
.WriteInt32(param.TerminalPixelWidth)
.WriteInt32(param.TerminalPixelHeight)
.WriteAsString(new byte[0])
);
if (_connection.IsEventTracerAvailable) {
_connection.TraceTransmissionEvent(
SSH2PacketType.SSH_MSG_CHANNEL_REQUEST, "pty-req", "terminal={0} width={1} height={2}",
param.TerminalName, param.TerminalWidth, param.TerminalHeight);
}
_negotiationStatus = NegotiationStatus.WaitingPtyReqConfirmation;
}
}
}
else if (_negotiationStatus == NegotiationStatus.WaitingPtyReqConfirmation) {
if (pt != SSH2PacketType.SSH_MSG_CHANNEL_SUCCESS) {
receiver.OnChannelError(new SSHException("opening pty failed"));
Close();
}
else {
//agent request (optional)
if (_connection.Param.AgentForward != null) {
Transmit(
0,
new SSH2Packet(SSH2PacketType.SSH_MSG_CHANNEL_REQUEST)
.WriteInt32(_remoteID)
.WriteString("*****@*****.**")
.WriteBool(true)
);
_connection.TraceTransmissionEvent(SSH2PacketType.SSH_MSG_CHANNEL_REQUEST, "auth-agent-req", "");
_negotiationStatus = NegotiationStatus.WaitingAuthAgentReqConfirmation;
}
else {
OpenScheme(scheme);
_negotiationStatus = NegotiationStatus.WaitingShellConfirmation;
}
}
}
else if (_negotiationStatus == NegotiationStatus.WaitingAuthAgentReqConfirmation) {
if (pt != SSH2PacketType.SSH_MSG_CHANNEL_SUCCESS && pt != SSH2PacketType.SSH_MSG_CHANNEL_FAILURE) {
receiver.OnChannelError(new SSHException("auth-agent-req error"));
Close();
}
else { //auth-agent-req is optional
_connection.SetAgentForwardConfirmed(pt == SSH2PacketType.SSH_MSG_CHANNEL_SUCCESS);
_connection.TraceReceptionEvent(pt, "auth-agent-req");
OpenScheme(scheme);
_negotiationStatus = NegotiationStatus.WaitingShellConfirmation;
}
}
else if (_negotiationStatus == NegotiationStatus.WaitingShellConfirmation) {
if (pt != SSH2PacketType.SSH_MSG_CHANNEL_SUCCESS) {
receiver.OnChannelError(new SSHException("Opening shell failed: packet type=" + pt.ToString()));
Close();
}
else {
receiver.OnChannelReady();
_negotiationStatus = NegotiationStatus.Ready; //goal!
}
}
else if (_negotiationStatus == NegotiationStatus.WaitingSubsystemConfirmation) {
if (pt != SSH2PacketType.SSH_MSG_CHANNEL_SUCCESS) {
receiver.OnChannelError(new SSHException("Opening subsystem failed: packet type=" + pt.ToString()));
Close();
}
else {
receiver.OnChannelReady();
_negotiationStatus = NegotiationStatus.Ready; //goal!
}
}
}
internal void TraceReceptionEvent(SSH2PacketType pt, byte[] msg)
{
TraceReceptionEvent(pt.ToString(), Encoding.ASCII.GetString(msg));
}
private void TraceTransmissionNegotiation(SSH2PacketType pt, string msg)
{
_connection.TraceTransmissionEvent(pt.ToString(), msg);
}