Send binary WebSocket frames in one write

2026-09-08 23:52:00 +02:00
parent 042499e4d6
commit 60d9c54bb4
10 changed files with 334 additions and 8 deletions
@@ -84,6 +84,8 @@ UART RX -> serial-service RX stream -> broker task

 The broker drains serial input even with no clients. A full client output stream drops only that client's copy and updates drop counters; it does not block UART reception or other clients.

+Binary serial WebSocket output uses the IDF-5.5.0-pinned `web_httpd_ws_send_binary` adapter: one owner-only session-override send of a bounded header+payload copy (516 bytes of local scratch, 512-byte payload). Existing generation validation and one outstanding work item per slot remain required. Non-full sends immediately replace that session's send override with a reject-only guard, mark it closing and shut down the socket before deferred cleanup; this prevents automatic SDK control replies from reentering TLS after incomplete output. HTTPD retains TLS destruction ownership. Text/control and admin output retain the SDK sender. One send call does not imply one TLS record, packet or peer receipt; the user signed off drop-free230400-baud full-client-mix operation at160MHz. Runtime stack-margin validation remains a separate follow-up; evidence and acceptance scope are in `current-state.md`.
+
 Active-client counter snapshots expose ID/type/pending/HWM/UART/queued/read/dropped. HWM is maintained independently of web tracing and counter clear seeds current occupancy. Read means transport handoff, not peer receipt. Disconnect removes the client row while global totals retain traffic and unread-output discards. Independent default-disabled web performance capture uses two fixed slot records and nonwrapping epoch/generation fences; toggles fence in-flight samples, disable freezes aggregates, clear preserves enable state. Binary-only timestamps bound reservation-entry to callback-entry before locking, synchronous send calls and completion to broker-read return; idle and intervening work prevent scheduler-only/backlog-at-completion claims. No new instrumentation allocations or scheduling/buffer changes. Exact fields, overhead and capture contracts: `docs/web_throughput_diagnostics.md`.

 ### Clients to RS-232