# Progress log — P3 (Transport & format)

See [PLAN.md](../../PLAN.md) for the phase table and migration model.

- **2026‑06‑02 — P3 (Transport & format) merged.** Ported into `ircd-common`: `s_err.rs` (the 1000‑entry `replies[]` numeric→format table), `s_id.rs` (UID/SID/CID), `s_numeric.rs` (`do_numeric`), `send.rs` (the non‑variadic delivery core `send_message`/`send_queued`/`flush_connections`/`flush_fdary`). Dropped from the link set: `s_err.o`, `s_id.o`, `s_numeric.o`; substituted: `send.o`→`send_link.o`. Spec: `docs/superpowers/specs/2026-06-02-p3-transport-format-design.md`; plan: `docs/superpowers/plans/2026-06-02-p3-transport-format.md`.
  - **Keystone finding (refines the hazard table):** the entire `sendto_*` (send.c) + `esendto_*` (s_send.c) family is **irreducibly C trampolines** — every one is C‑variadic and consumes `va_list` through a formatter (`vsendprep`/`vsendpreprep`/`build_suffix`), and `vsendpreprep` (send.c:384) consumes `va_arg` **per recipient**, so there is no "format once → Rust core" reduction. The Rust "cores" P3 actually extracts are the **delivery** fns, not the senders. The senders + `vsendto_one`/`sendto_flog`/`logfiles_*`/`setup_svchans` + the static buffers/`anon`/`svchans` stay C; they vanish in **P8** when call sites adopt `format!`. **s_send.c is therefore 100% C in P3 (nothing ported).**
  - **Verified config gates (all OFF):** `USE_SERVICES`, `LOG_SERVER_CHANNELS`, `USE_SYSLOG`, `LOG_OLDFORMAT`, `ZIP_LINKS`, `CLIENTS_CHANNEL`, `JAPANESE`, `POOLSIZE_LIMITED` → the corresponding branches of `send_message`/`send_queued`/`sendto_flog`/`setup_svchans` are omitted from the Rust port. `SCH_MAX`=14.
  - **`send_link.o` partial‑port (extends P1/P2):** `send.c` compiled twice — pristine `send.o` for the oracle; `send_link.o` with `-DPORT_SEND_P3` that `#ifndef`‑guards the 4 ported delivery fns out of the link set **and exposes `dead_link`** (drops `static`) so the Rust core can call that still‑variadic C fn. Built via `make --eval` so the recursive `-DFNAME_USERLOG/CONNLOG/SCH_PREFIX` path vars expand identically for the surviving C `logfiles_open`. Pristine `send.o` (`dead_link` static, `send_message` defined) is unchanged.
  - **Faithfulness notes (caught in review):** `replies[]` is **not** mechanically text‑extractable — it contains `#if/#else/#endif` config branches (WHOIS_SIGNON_TIME/USERS_RFC1459/ENABLE_SUMMON/TXT_NOSTATSK), two bare‑`NULL` entries, and an escaped `\r\n` (entry 384) that Rust source‑level CRLF normalization would silently corrupt → it is **dumped from the compiled `cref_replies` oracle** with byte‑level escaping. `alphabet_id[256]` in s_id.c is partially initialized (249 explicit values) so indices 249..=255 default to **0** (reproduced verbatim). `init_sid` is `#if 0` (not ported). `poolsize *= 1.1` reproduced as `(poolsize as f64 * 1.1) as u_int`.
  - **L1 coverage / L2 deferrals:** L1 zero‑diff vs `cref_` on the `replies[]` table (all 1000 slots), `ltoid`/`idtol` round‑trip + `sid_valid`/`cid_ok`/`check_uid`, `do_numeric`'s early‑out guards, and `send_message` sendQ buffering (bytes + `sendM` + `lastsq`) + `send_queued`'s dead/empty early returns. **Deferred to L2** (need full server state — initialized hash tables, registered `me`, `cref_`'s separate globals, a live fd): the `do_numeric` broadcast wire output and the `send_queued` `deliver_it` write path.
  - **Verification:** `cargo build` warning‑free; Rust‑driven `ircd` links (`send_link.o`'s variadic senders call the Rust `send_message`; the Rust core calls C `dead_link`/`deliver_it`); all `*_diff` L1 tests zero‑diff; layout net green.