Implement Telnet SGA Option (Suppress Go Ahead)

[myonara]

Description:
Implement support for the Telnet SGA (Suppress Go Ahead) option to disable the "Go Ahead" (GA) signal requirement, allowing a smoother, uninterrupted data flow between the client and server. This option is essential for interactive applications where immediate responses are needed without extra signaling overhead.

Details:

1. Option Code: 3

2. Functionality:

   • The client should initiate the SGA negotiation by sending IAC DO SGA to the server.
   • If the server responds with IAC WILL SGA, the client and server agree to suppress GA signals, enabling continuous data flow.
   • Once the negotiation is successful, the GA signal will no longer be required in the data exchange.

3. Expected Workflow:

   • The client sends IAC DO SGA to request suppression of GA signals.
   • Upon receiving IAC WILL SGA from the server, the client and server enter an SGA-negotiated state.

4. Acceptance Criteria:

   • The client successfully initiates and completes SGA negotiation with the server.
   • Post-negotiation, data flow occurs without the need for GA signals.

References:

• Telnet RFC 858 (for Suppress Go Ahead option)