Phase 1: Incoming Protocol-Level Protection
- Added MAX_LINES_PER_POLL = 50 constant to limit lines processed per
poll iteration in irc_feed(), preventing burst flooding.
- Added poll_lines_left counter to Session struct, reset each poll cycle.
- Changed RateLimitEntry to track by user@host instead of nick, preventing
trivial bypass via nick cycling.
- Parse userhost from IRC prefix (nick!user@host) in irc_handle().
- Added violation tracking to RateLimitEntry for escalating penalties.
Phase 2: Outgoing Message Throttling
- Added OUTGOING_DELAY_MS = 100 constant for minimum delay between sends.
- Modified net_send() with timestamp-based throttling using clock_gettime().
- Added 200ms delay between lines in !gitlog output (cmd_gitlog.h).
- Added 150ms delay between AI response chunks (ai.h).
Phase 3: Rate Limit Improvements
- Increased RATE_LIMIT_MAX from 8 to 32 for larger tracking buffer.
- Added TELL_DELIVER_MAX = 5 to limit messages per nick delivery.
- Added AI_COOLDOWN_SECS = 5 to prevent rapid AI query re-submission.
Phase 4: Command-Specific Fixes
- Added rate_limit_check() to cmd_greeting_or_chat.h for casual chat.
- Limited tell_deliver() to 5 messages per nick, excess stays queued.
- Added 5-second cooldown after AI query completion before next query.
Files modified: zynk.h, zynk.c, irc.h, net.h, ai.h, db.h, and all
19 command header files to pass current_userhost to rate_limit_check().
- Added irc_reply(): new IRC response helper that automatically prepends
the sender's nick to channel messages (e.g. 'nick: pong!'), while
leaving private-message responses unmodified. This makes it clear
which user the bot is addressing in busy channels.
- Converted all non-admin command handlers to use irc_reply() instead of
raw irc_msg(): !ping, !zynk, !weather, !forecast, !stock, !calc,
!time, !seen, !tell, !gitlog, !changelog, !ai, !uptime, !version,
!help, greeting/chat responses, and the 'Not implemented...' fallback.
- Converted AI async responses (ai_check_completion()) to use irc_reply(),
so AI answers delivered after the original query also show the nick.
- Converted AI error messages in ai_ask() (rate-limit busy, fork failure,
start failure) to use irc_reply().
- Removed redundant manual nick prefixes from commands that already
embedded the sender's nick in their response text: !ping, !calc,
!time, !uptime, and greeting/chat responses.
- Admin commands (!quit, !reload, !restart, !rebuild, !code) are
intentionally excluded - these are privileged operations where the
nick prefix adds no value.
- The tell_deliver() function retains its own existing format.
- !gitlog now shows a link to each commit in the repository, using the
git remote URL converted from SSH/SCP to HTTPS
- !changelog now shows a 'Full changelog: <url>' link to CHANGELOG.md
in the repository as the last message after all entries
- Removed 'full' keyword from !gitlog and !changelog (previously showed
full commit messages and complete changelog entries)
- Switched build system from Make to CMake with feature toggles
(-DWITH_<FEATURE>=ON/OFF)
- Refactored single-file codebase into dedicated header files: each
command now lives in its own cmd_*.h file, with separate modules for
database (db.h), IRC protocol (irc.h), networking (net.h), TLS (tls.h),
and AI (ai.h)
- Updated README.md to reflect the simplified !gitlog and !changelog
syntax and the new CMake build instructions
(0.40.0)
