[pull] master from jquast:master#13
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pull[bot] merged 3 commits intothreatcode:masterfrom Feb 15, 2026
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- **change**: `telnetlib3-client` now defaults to raw terminal mode (no line buffering, no local echo), which is correct for most servers. Use `--line-mode` to restore line-buffered local-echo behavior. - **change**: `telnetlib3-server --pty-exec` now defaults to raw PTY mode. Use `--line-mode` to restore cooked PTY mode with echo. - **change**: `connect_minwait` default reduced to 0 across `BaseClient`, `open_connection()`, and `telnetlib3-client`. Negotiation continues asynchronously. Use `--connect-minwait` to restore a delay if needed, or use `TelnetWriter.wait_for()` in server or client shells to await a specific negotiation state. - **new**: Color, keyboard input translation and `--encoding` support for ATASCII (ATARI ASCII) and PETSCII (Commodore ASCII). - **new**: SyncTERM/CTerm font selection sequence detection (`CSI Ps1 ; Ps2 SP D`). Both `telnetlib3-fingerprint` and `telnetlib3-client` detect font switching and auto-switch encoding to the matching codec (e.g. font 36 = ATASCII, 32-35 = PETSCII, 0 = CP437). Explicit `--encoding` takes precedence. - **new**: `TRACE` log level (5, below `DEBUG`) with hexdump style output for all sent and received bytes. Use `--loglevel=trace`. - **bugfix**: `robot_check()` now uses a narrow character (space) instead of a wide Unicode character, allowing retro terminal emulators to pass. - **bugfix**: ATASCII codec now maps bytes 0x0D and 0x0A to CR and LF instead of graphics characters, fixing garbled output when connecting to Atari BBS systems. - **bugfix**: ATASCII codec normalizes CR and CRLF to the native ATASCII EOL (0x9B) during encoding, so the Return key works correctly. - **bugfix**: PETSCII bare CR (0x0D) is now normalized to CRLF in raw terminal mode and to LF in `telnetlib3-fingerprint` banners. - **bugfix**: `telnetlib3-fingerprint` re-encodes prompt responses for retro encodings so servers receive the correct EOL byte. - **bugfix**: `telnetlib3-fingerprint` no longer crashes with `LookupError` when the server negotiates an unknown charset. Banner formatting falls back to `latin-1`. - **bugfix**: `TelnetClient.send_charset()` normalises non-standard encoding names (`iso-8859-02` to `iso-8859-2`, `cp-1250` to `cp1250`, etc.). - **enhancement**: `telnetlib3-fingerprint` responds more like a terminal and to more y/n prompts about colors, encoding, etc. to collect more banners for the https://bbs.modem.xyz/ project. - **enhancement**: `telnetlib3-fingerprint` banner formatting uses `surrogateescape` error handler, preserving raw high bytes (e.g. CP437 art) as surrogates instead of replacing them with U+FFFD.
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