internal void ProcessPacket(ISSHChannelEventReceiver receiver, PacketType pt, int data_length, SSH2DataReader re)
{
//NOTE: the offset of 're' is next to 'receipiant channel' field
_leftWindowSize -= data_length;
while(_leftWindowSize <= _windowSize) {
SSH2DataWriter adj = new SSH2DataWriter();
adj.WritePacketType(PacketType.SSH_MSG_CHANNEL_WINDOW_ADJUST);
adj.Write(_remoteID);
adj.Write(_windowSize);
TransmitPacket(adj.ToByteArray());
_leftWindowSize += _windowSize;
//Debug.WriteLine("Window size is adjusted to " + _leftWindowSize);
}
if(pt==PacketType.SSH_MSG_CHANNEL_WINDOW_ADJUST) {
int w = re.ReadInt32();
//Debug.WriteLine(String.Format("Window Adjust +={0}",w));
}
else if(_negotiationStatus!=0) { //when the negotiation is not completed
if(_type==ChannelType.Shell)
OpenShell(receiver, pt, re);
else if(_type==ChannelType.ForwardedLocalToRemote)
ReceivePortForwardingResponse(receiver, pt, re);
else if(_type==ChannelType.Session)
EstablishSession(receiver, pt, re);
}
else {
switch(pt) {
case PacketType.SSH_MSG_CHANNEL_DATA: {
int len = re.ReadInt32();
receiver.OnData(re.Image, re.Offset, len);
}
break;
case PacketType.SSH_MSG_CHANNEL_EXTENDED_DATA: {
int t = re.ReadInt32();
byte[] data = re.ReadString();
receiver.OnExtendedData(t, data);
}
break;
case PacketType.SSH_MSG_CHANNEL_REQUEST: {
string request = Encoding.ASCII.GetString(re.ReadString());
bool reply = re.ReadBool();
if(request=="exit-status") {
int status = re.ReadInt32();
}
else if(reply) { //we reject unknown requests including keep-alive check
SSH2DataWriter wr = new SSH2DataWriter();
wr.Write((byte)PacketType.SSH_MSG_CHANNEL_FAILURE);
wr.Write(_remoteID);
TransmitPacket(wr.ToByteArray());
}
}
break;
case PacketType.SSH_MSG_CHANNEL_EOF:
receiver.OnChannelEOF();
break;
case PacketType.SSH_MSG_CHANNEL_CLOSE:
_connection.UnregisterChannelEventReceiver(_localID);
receiver.OnChannelClosed();
break;
case PacketType.SSH_MSG_CHANNEL_FAILURE:
case PacketType.SSH_MSG_CHANNEL_SUCCESS:
receiver.OnMiscPacket((byte)pt, re.Image, re.Offset, re.Rest);
break;
default:
receiver.OnMiscPacket((byte)pt, re.Image, re.Offset, re.Rest);
Debug.WriteLine("Unknown Packet "+pt);
break;
}
}
}
public void OnData(byte[] data, int offset, int length)
{
_handler.OnData(data, offset, length);
}
private void ProcessChannelLocalData(ISSHChannelEventReceiver receiver, PacketType pt, SSH2DataReader re) {
switch(pt) {
case PacketType.SSH_MSG_CHANNEL_DATA: {
int len = re.ReadInt32();
receiver.OnData(re.Image, re.Offset, len);
}
break;
case PacketType.SSH_MSG_CHANNEL_EXTENDED_DATA: {
int t = re.ReadInt32();
byte[] data = re.ReadString();
receiver.OnExtendedData(t, data);
}
break;
case PacketType.SSH_MSG_CHANNEL_REQUEST: {
string request = Encoding.ASCII.GetString(re.ReadString());
bool reply = re.ReadBool();
if(request=="exit-status") {
int status = re.ReadInt32();
}
else if(reply) { //we reject unknown requests including keep-alive check
SSH2DataWriter wr = new SSH2DataWriter();
wr.WritePacketType(PacketType.SSH_MSG_CHANNEL_FAILURE);
wr.Write(_remoteID);
TransmitPayload(wr.ToByteArray());
}
}
break;
case PacketType.SSH_MSG_CHANNEL_EOF:
receiver.OnChannelEOF();
break;
case PacketType.SSH_MSG_CHANNEL_CLOSE:
_connection.ChannelCollection.UnregisterChannelEventReceiver(_localID);
receiver.OnChannelClosed();
break;
case PacketType.SSH_MSG_CHANNEL_FAILURE:
receiver.OnMiscPacket((byte)pt, re.Image, re.Offset, re.Rest);
break;
default:
receiver.OnMiscPacket((byte)pt, re.Image, re.Offset, re.Rest);
Debug.WriteLine("Unknown Packet "+pt);
break;
}
}
private void ProcessChannelLocalData(ISSHChannelEventReceiver receiver, SSH2PacketType pt, SSH2DataReader re)
{
switch (pt) {
case SSH2PacketType.SSH_MSG_CHANNEL_DATA: {
int len = re.ReadInt32();
DataFragment frag = re.GetRemainingDataView(len);
receiver.OnData(frag.Data, frag.Offset, frag.Length);
}
break;
case SSH2PacketType.SSH_MSG_CHANNEL_EXTENDED_DATA: {
int t = re.ReadInt32();
byte[] data = re.ReadByteString();
receiver.OnExtendedData(t, data);
}
break;
case SSH2PacketType.SSH_MSG_CHANNEL_REQUEST: {
string request = re.ReadString();
bool reply = re.ReadBool();
if (request == "exit-status") {
int status = re.ReadInt32();
}
else if (reply) { //we reject unknown requests including keep-alive check
Transmit(
0,
new SSH2Packet(SSH2PacketType.SSH_MSG_CHANNEL_FAILURE)
.WriteInt32(_remoteID)
);
}
}
break;
case SSH2PacketType.SSH_MSG_CHANNEL_EOF:
receiver.OnChannelEOF();
break;
case SSH2PacketType.SSH_MSG_CHANNEL_CLOSE:
_connection.ChannelCollection.UnregisterChannelEventReceiver(_localID);
receiver.OnChannelClosed();
break;
case SSH2PacketType.SSH_MSG_CHANNEL_FAILURE: {
DataFragment frag = re.GetRemainingDataView();
receiver.OnMiscPacket((byte)pt, frag.Data, frag.Offset, frag.Length);
}
break;
default: {
DataFragment frag = re.GetRemainingDataView();
receiver.OnMiscPacket((byte)pt, frag.Data, frag.Offset, frag.Length);
}
Debug.WriteLine("Unknown Packet " + pt);
break;
}
}