cTCPLink


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Globals

Contents


cTCPLink class

This class wraps a single TCP connection, that has been established. Plugins can create these by calling cNetwork:Connect() to connect to a remote server, or by listening using cNetwork:Listen() and accepting incoming connections. The links are callback-based - when an event such as incoming data or remote disconnect happens on the link, a specific callback is called. See the additional information in cNetwork documentation for details.

The link can also optionally perform TLS encryption. Plugins can use the StartTLSClient() function to start the TLS handshake as the client side. Since that call, the OnReceivedData() callback is overridden internally so that the data is first routed through the TLS decryptor, and the plugin's callback is only called for the decrypted data, once it starts arriving. The Send function changes its behavior so that the data written by the plugin is first encrypted and only then sent over the network. Note that calling Send() before the TLS handshake finishes is supported, but the data is queued internally and only sent once the TLS handshake is completed.


Functions

NameParametersReturn valueNotes
Close Closes the link forcefully (TCP RST). There's no guarantee that the last sent data is even being delivered. See also the Shutdown() method.
GetLocalIP
string
Returns the IP address of the local endpoint of the TCP connection.
GetLocalPort
number
Returns the port of the local endpoint of the TCP connection.
GetRemoteIP
string
Returns the IP address of the remote endpoint of the TCP connection.
GetRemotePort
number
Returns the port of the remote endpoint of the TCP connection.
Send
Datastring
Sends the data (raw string) to the remote peer. The data is sent asynchronously and there is no report on the success of the send operation, other than the connection being closed or reset by the underlying OS.
Shutdown Shuts the socket down for sending data. Notifies the remote peer that there will be no more data coming from us (TCP FIN). The data that is in flight will still be delivered. The underlying socket will be closed when the remote end shuts down as well, or after a timeout.
StartTLSClient
OwnCertstring
OwnPrivateKeystring
OwnPrivateKeyPasswordstring
IsSuccessboolean
ErrorMessagestring
Starts a TLS handshake on the link, as a client side of the TLS. The Own___ parameters specify the client certificate and its corresponding private key and password; all three parameters are optional and no client certificate is presented to the remote peer if they are not used or all empty. Once the TLS handshake is started by this call, all incoming data is first decrypted before being sent to the OnReceivedData callback, and all outgoing data is queued until the TLS handshake completes, and then sent encrypted over the link. Returns true on success, nil and optional error message on immediate failure.
NOTE: The TLS support in the API is currently experimental and shouldn't be considered safe - there's no peer certificate verification and the error reporting is only basic.
StartTLSServer
Certificatestring
PrivateKeystring
PrivateKeyPasswordstring
StartTLSDatastring
IsSuccessboolean
ErrorMessagestring
Starts a TLS handshake on the link, as a server side of the TLS. The plugin needs to specify the server certificate and its corresponding private key and password. The StartTLSData can contain data that the link has already reported as received but it should be used as part of the TLS handshake. Once the TLS handshake is started by this call, all incoming data is first decrypted before being sent to the OnReceivedData callback, and all outgoing data is queued until the TLS handshake completes, and then sent encrypted over the link. Returns true on success, nil and optional error message on immediate failure.
NOTE: The TLS support in the API is currently experimental and shouldn't be considered safe - there's no peer certificate verification and the error reporting is only basic.
Generated on 2017-06-26 01:00:07, Build ID Unknown, Commit approx: bd025e2bdbaf86425b1d692ffc4aa87c3c086cc7