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TNT/TODO.md
m1ngsama d1623f64d4 refactor(ssh): migrate to libssh callback-based API 
Replace deprecated message-based authentication and channel APIs with
modern callback-based server implementation (libssh 0.9+).

Changes:
- Replace ssh_message_auth_password with auth_password_function callback
- Replace ssh_message_channel_request_pty_* with channel_pty_request_function
- Remove #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
- Implement session_context_t to pass state between callbacks
- Fix event loop to wait for auth, channel open, AND channel ready (PTY/shell/exec)

Key improvements:
- Eliminates message loop complexity (libssh handles state machine)
- Proper handling of SSH exec requests (e.g., "ssh host exit")
- More maintainable and future-proof code

Testing:
- All tests passing (17/17)
  - Basic functionality: 3/3
  - Anonymous access: 2/2
  - Security features: 11/11
  - Stress test: pass

This closes the maintenance debt listed in TODO.md and ensures
compatibility with future libssh versions.
2026-02-07 23:04:06 +08:00

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TODO

Maintenance

  • Replace deprecated libssh functions in src/ssh_server.c:
    • ssh_message_auth_password → auth_password_function callback (✓ completed)
    • ssh_message_channel_request_pty_width/height → channel_pty_request_function callback (✓ completed)
    • Migrated to callback-based server API as of libssh 0.9+

Future Features

  • Implement robust command handling for non-interactive SSH exec requests.
    • Basic exec support completed (handles exit command)
    • All tests passing