ChangeLog

(in-progress)
- modemu2k (v0.2.5)
  * New accessors for hosts that emulate a UART: m2k_pending_to_dte,
    m2k_pending_to_line and m2k_get_ring_count
  * Fix data loss in telnet line mode when the peer stops reading: the
    DTE side kept being drained past the socket buffer's limit, where
    the excess was discarded instead of held back

2026-07-18
- modemu2k (v0.2.4)
  * Fix ATD aborting when the command line arrives as CR LF (DOS-style
    DTEs): stray CR/LF/NUL during dialing no longer cancel the call;
    any other input still does (V.250 abort-on-input)
  * Hide internal symbols from the shared library; only m2k_* is
    exported now (flex's yylex leaked and collided with dosemu2's
    config lexer, silently breaking all AT parsing when embedded)
  * m2k_setup_answer now errors out if the listener can't be set
    non-blocking, instead of risking a hung m2k_step

2026-07-14
- modemu2k (v0.2.3)
  * Add -a/--answer and ATA/RING/S0 answer-side modem semantics, so a
    BBS on the PTY can receive incoming TCP calls (new m2k_setup_answer
    / m2k_get_answer_fd API)
  * -v/--verbose is now repeatable: -vv adds byte-level buffer
    narration (new VERB_BYTES category, AT%V4)
  * Add m2k_set_log_level() / m2k_get_log_level() — severity-threshold
    log filter (ERROR/WARN/INFO/DEBUG/TRACE); AT%V category semantics
    unchanged
  * Add m2k_describe_state() — one-call state snapshot for bug reports
    and host-side debugging
  * Stop treating the comm-program command as a printf format string;
    substitute the slave path safely (overflow / format-string fix)
  * Fix out-of-bounds read of telopts[] when a telnet peer sends a
    malformed subnegotiation option byte
  * Fix telnet IAC parser state being shared between modem contexts
    (two m2k_t instances online at once corrupted each other's stream)
  * Close the library-owned PTY / dev / accepted-client fd in
    m2k_free() (was leaked every session)
  * m2k-minicom: pass options after `--` to minicom (e.g.
    `m2k-minicom -- -R CP437` to convert a BBS's CP437 characters
    for a UTF-8 terminal)
  * Rewrite test_connect / test_ipv6 to use loopback only; the dial
    docblock `@snippet` moves to examples/m2k_dial.c. Removes hardcoded
    GitHub IP and the need for any `network` suite tag
  * Refresh public-header docblocks: drop deprecated m2k_dial /
    m2k_online guidance; clarify several error-code edges

2026-05-30
- modemu2k (v0.2.2)
  * Fix pkg-config Cflags so consumers can `#include <modemu2k.h>`
    (was forcing the namespaced `<modemu2k/modemu2k.h>` form)
  * Fix interactive ATZ wiping the -v verbose mask mid-session; add
    m2k_set_force_verbose / m2k_get_force_verbose public API for hosts
    that want narration regardless of AT%V state

2026-05-28
- modemu2k (v0.2.1)
  * Add -v/--verbose flag (CLI). -v previously meant --version,
    which now requires -V (breaking)
  * Fix at%q to actually quit (regression from v0.2.0)
  * Ctrl-C twice in CMD mode quits (CMD only; online mode
    unaffected)
  * m2k-minicom / m2k-picocom helper scripts forward arbitrary
    args to modemu2k

2026-05-27
- modemu2k (v0.2.0)
  * Refactor core into libmodemu2k; public API in modemu2k.h at the
    project root, with M2K_API visibility markers on every public
    function and M2K_VERSION_* macros + m2k_version() for
    header/library skew detection
  * Add steppable event-loop API (m2k_get_pollfds, m2k_step,
    m2k_run_done, plus M2K_STATE_DIAL for non-blocking ATD) and
    embed-mode I/O (m2k_setup_app_io, m2k_write_from_app,
    m2k_read_to_app) so a host program can run modemu2k inside its
    own poll/epoll loop with the host supplying the TTY-side bytes
  * Add curl-style per-context error reporting: m2k_set_error_buffer
    with M2K_ERROR_BUFFER_SIZE, m2k_strerror, and the M2K_ERR_*
    codes (including M2K_ERR_AT for rejected AT commands and
    M2K_ERR_WOULDBLOCK for flow-control retry)
  * Add m2k_escape, m2k_is_online, m2k_has_carrier, m2k_get_listen_fd,
    and m2k_set_dtr/_rts (with matching getters) for embed-mode
    hosts; DTR 1→0 while a connection is live hangs up
    (&D2-equivalent)
  * Add TCP listen mode (-l/--listen <port>) for use as a virtual
    modem backend (issue #32)
  * Print --help output and exit when invoked with no arguments;
    reject conflicting -c/-d/-l/-s combinations at parse time
    instead of silently honoring the last one
  * Wrap modemu2k.h declarations in extern "C" guards for C++ consumers
  * Per-ctx state separation: +++ escape detector, line buffer, and
    telnet option negotiation tables moved into m2k_t so two
    coexisting contexts no longer share/clobber each other
  * Detect POSIX PTY allocation via meson at configure time, fixing
    PTY setup on macOS and FreeBSD which the previous compile-time
    gate silently misdetected
  * Fix connecting via hostname when the first resolved address fails,
    e.g. localhost resolving to ::1 before 127.0.0.1 (issue #44)
  * m2k_setup_pty() now returns a const char* into ctx-owned storage
    instead of a heap-allocated string the caller must free (breaking)
  * Add HACKING.md with code map, contracts, and integration sketches;
    wired into the doxygen Related Pages
  * Deprecate m2k_dial / m2k_online; slated for removal in 0.3.0 — use
    m2k_run() or the step API instead
  * Remove gettext/NLS support and translations
  * Sync license claim to GPL-2-or-later (matches the source headers)

2022-08-18
- modemu2k (v0.1.0)
  * fix segfault when building with Slackbuild or setting buildtype to debug
  * fix build on macos (timeval errors, see
    https://github.com/theimpossibleastronaut/modemu2k/pull/40)
  * fix connecting to host using IP
  * replaced autotools build system with mesonbuild
  * 'm2k-minicom.sh' script renamed to 'm2k-minicom'

2020-06-19

  * v0.0.6 released

2020-06-18

  * Fix for compiling on gcc-10

2019-8-23

  * v0.0.5 released

2019-8-22

  * When making a connection, a message is printed informing the user
  how to escape to command mode and return to online mode.


2019-8-21

  * IPv6 connections can now be made.

  * To specify a non-standard port, you must use a space now instead of
  a colon


2019-8-19

  * Replaced obsolete gethostbyname() with getaddrinfo()

  * If the m2k-minicom.sh script is run from the scripts/ directory, it will
  use the dev build of modemu2k in src/


2019-08-18

  * v0.0.4 released

2019-08-17

  * Fixed --version output

  * Added script to invoke minicom: 'm2k-minicom.sh'

  * Infrastructure to implement testing with `make check` added.


2018-10-17

  * v0.0.3 released

2018-10-14

  * zh_CN translation added
  * nl_NL translation added

2018-10-13

  * Removed "-" option
  * Added support for translated messages using the GNU gettext library
  * Improved usage output
  * Now using getopt.h to parse cmd args

2018-10-11

  * it_IT translation of man page added


2018-10-08

  * pt_BR translation of man page added

2018-09-06

  * Added quit instructions to start-up screen
  * auto-generated config.h is now used
  * man file will now install
  * issue v0.0.2 release


2018-09-05

  * applied patch from https://github.com/aur-archive/modemu
  * Added configure script, autoconf and automake file
  * increase version to 0.0.2-dev
  * modemu2k Fork created