private void ProcessPortforwardingRequest(ISSHConnectionEventReceiver receiver, SSH1DataReader reader)
{
int server_channel = reader.ReadInt32();
string host = Encoding.ASCII.GetString(reader.ReadString());
int port = reader.ReadInt32();
SSH1DataWriter writer = new SSH1DataWriter();
PortForwardingCheckResult result = receiver.CheckPortForwardingRequest(host, port, "", 0);
if (result.allowed)
{
int local_id = _channel_collection.RegisterChannelEventReceiver(null, result.channel).LocalID;
_eventReceiver.EstablishPortforwarding(result.channel, new SSH1Channel(this, ChannelType.ForwardedRemoteToLocal, local_id, server_channel));
writer.WriteInt32(server_channel);
writer.WriteInt32(local_id);
SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_CHANNEL_OPEN_CONFIRMATION, writer.ToByteArray());
p.WriteTo(_stream, _tCipher);
}
else
{
writer.WriteInt32(server_channel);
SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_MSG_CHANNEL_OPEN_FAILURE, writer.ToByteArray());
p.WriteTo(_stream, _tCipher);
}
}
public override PortForwardingCheckResult CheckPortForwardingRequest(string remote_host, int remote_port, string originator_ip, int originator_port)
{
PortForwardingCheckResult r = new PortForwardingCheckResult();
try {
if (!_profile.AllowsForeignConnection && originator_ip != "127.0.0.1")
{
r.allowed = false;
r.reason_message = "refused";
return(r);
}
Socket local = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
local.Connect(new IPEndPoint(Util.ResolveHost(_profile.DestinationHost), _profile.DestinationPort));
r.allowed = true;
r.channel = new Channel(_profile.SSHHost, originator_ip, _id, null, local);
return(r);
}
catch (Exception ex) {
Debug.WriteLine(ex.StackTrace);
Util.InterThreadWarning(ex.Message);
r.allowed = false;
r.reason_message = "refused";
return(r);
}
}
public PortForwardingCheckResult CheckPortForwardingRequest(string host, int port, string originator_host, int originator_port)
{
PortForwardingCheckResult r = new PortForwardingCheckResult();
r.allowed = true;
r.channel = this;
return(r);
}
public PortForwardingCheckResult CheckPortForwardingRequest(string host, int port, string originator_host, int originator_port)
{
PortForwardingCheckResult r = new PortForwardingCheckResult();
r.allowed = true;
r.channel = this;
return r;
}
