docs/Architecture.md

@@ -926,8 +926,9 @@ main
 ### HTTP Frontend Auth
 
 - Optional Argon2id-backed managed accounts with HttpOnly session cookies
-- An exclusive Guest role plus composable Read, Control, Write, and Administrator roles, with policy shared by middleware and handlers
+- An exclusive Guest role plus composable Read, Control, Transmit, Write, and Administrator roles, with policy shared by middleware and handlers
 - Guest sessions receive read-only station access but no account-control endpoints or panels
+- Transmit separately gates PTT, TX audio frames, and TX power-limit changes
 - Atomic JSON persistence with migration from the legacy single-role schema
 - Account enable/disable, administrator CRUD, self-service password changes, and session revocation on security changes
 - A database invariant always preserves at least one enabled administrator

docs/Planned-Features.md

@@ -541,8 +541,8 @@ setting, which is also what LoTW's station locations expect.
 rotate operators through one station callsign, which is why contest loggers record it per QSO.
 It is stored per QSO, defaulted from the configured callsign so a single operator never touches
 it, and changed on the station line at the top of the panel where it sticks for the session.
-It cannot be taken from the session's identity: the auth roles are `admin` and `user`, with no
-notion of who is logged in.
+It cannot be inferred from the session's identity: an account username need not be an operator
+callsign, and operational accounts may be shared.
 
 **Server clock, and the log says so.** The server is the machine at the radio; the browser may
 be on a phone in another timezone with a clock nobody has checked. QSO times are UTC from the

docs/UX_Guidelines.md

@@ -127,7 +127,7 @@ When auth is enabled, an **auth gate** blocks the UI with:
 - Role badge display
 
 **Guest** provides read-only station access and is exclusive. Non-Guest accounts
-may combine **Read**, **Control**, **Write**, and **Administrator** roles.
+may combine **Read**, **Control**, **Transmit**, **Write**, and **Administrator** roles.
 Administrator implies all permissions.
 
 Session cookie: `trx_http_sid`, HttpOnly, configurable Secure and SameSite attributes.
@@ -337,13 +337,14 @@ Logo and favicon are embedded at compile time via `include_bytes!`. The logo ima
 
 ### 7.1 Route Access Classification
 
-Routes are classified into three tiers:
+Routes are classified into access tiers:
 
 | Tier | Examples | Requirement |
 |---|---|---|
 | **Public** | `/`, `/index.html`, `/map`, login/session endpoints, static assets | None |
-| **Read** | `/status`, `/events`, `/audio`, `/decode`, `/spectrum`, `/bookmarks` | Guest, Read, Control, or Administrator role |
-| **Control** | `/set_freq`, `/set_mode`, `/set_ptt`, `/toggle_power`, radio-control POST routes | Control or Administrator role |
+| **Read** | `/status`, `/events`, `/audio`, `/decode`, `/spectrum`, `/bookmarks` | Guest, Read, Control, Transmit, or Administrator role |
+| **Control** | `/set_freq`, `/set_mode`, `/toggle_power`, receive-side radio-control POST routes | Control or Administrator role |
+| **Transmit** | `/set_ptt`, `/set_tx_limit`, outbound `/audio` frames | Transmit or Administrator role |
 | **Write** | Logbook access and bookmark mutations | Write or Administrator role |
 
 ### 7.2 Session Management

docs/User-Manual.md

@@ -593,7 +593,8 @@ The HTTP frontend supports an optional user/password ACL:
 
 - **Guest** — read-only station access with no Account or Users controls; Guest cannot be combined with another role
 - **Read** — monitoring, audio, decode streams, and bookmark reads
-- **Control** — full radio receive/transmit controls
+- **Control** — tuning, mode, power, and receive-side radio controls
+- **Transmit** — PTT, transmitted audio, and TX power-limit controls
 - **Write** — logbook access and bookmark changes
 - **Administrator** — user management and all other permissions
 
@@ -644,8 +645,9 @@ credentials in configuration before first startup on an exposed deployment.
 | `/auth/users` | GET/POST | List or add users (admin only) |
 | `/auth/users/{username}` | PATCH/DELETE | Change enabled state/password/roles or remove user (administrator only) |
 
-Read routes accept Guest or require Read. Radio mutations require Control. Logbook access and
-bookmark mutations require Write. Administrator grants every permission.
+Read routes accept Guest or require Read. Tuning and receive-side radio mutations
+require Control. PTT, transmitted audio, and TX limit changes require Transmit.
+Logbook access and bookmark mutations require Write. Administrator grants every permission.
 
 ### Frontend Flow
 

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/app.js

@@ -13,7 +13,7 @@ import {
   logout,
   normalizeAuthRoles,
   updateUser
-} from "./chunk-FT2RH7BL.js";
+} from "./chunk-PISLBJGN.js";
 
 // src/webgl-renderer.ts
 (function initTrxWebGl(global) {
@@ -1972,30 +1972,33 @@ function updateAuthUI() {
 }
 function applyAuthRestrictions() {
   if (authRoles.length === 0) return;
-  if (!hasAuthRole2("control")) {
+  if (!hasAuthRole2("transmit")) {
     const pttBtn2 = document.getElementById("ptt-btn");
+    const txLimitInput2 = document.getElementById("tx-limit");
+    const txLimitBtn2 = document.getElementById("tx-limit-btn");
+    const txAudioBtn2 = document.getElementById("tx-audio-btn");
+    const txLimitRow2 = document.getElementById("tx-limit-row");
+    if (pttBtn2) pttBtn2.disabled = true;
+    if (txAudioBtn2) txAudioBtn2.disabled = true;
+    if (txLimitBtn2) txLimitBtn2.disabled = true;
+    if (txLimitInput2) txLimitInput2.disabled = true;
+    if (txLimitRow2) txLimitRow2.style.opacity = "0.5";
+  }
+  if (!hasAuthRole2("control")) {
     const powerBtn2 = document.getElementById("power-btn");
     const lockBtn2 = document.getElementById("lock-btn");
     const freqInput = document.getElementById("freq");
     const centerFreqInput = document.getElementById("center-freq");
     const modeSelect = document.getElementById("mode");
-    const txLimitInput2 = document.getElementById("tx-limit");
-    const txLimitBtn2 = document.getElementById("tx-limit-btn");
-    const txAudioBtn2 = document.getElementById("tx-audio-btn");
-    const txLimitRow2 = document.getElementById("tx-limit-row");
     const jogUp = document.getElementById("jog-up");
     const jogDown = document.getElementById("jog-down");
     const jogButtons = document.querySelectorAll(".jog-step button");
     const vfoButtons = document.querySelectorAll("#vfo-picker button");
-    if (pttBtn2) pttBtn2.disabled = true;
     if (powerBtn2) powerBtn2.disabled = true;
     if (lockBtn2) lockBtn2.disabled = true;
-    if (txAudioBtn2) txAudioBtn2.disabled = true;
-    if (txLimitBtn2) txLimitBtn2.disabled = true;
     if (freqInput) freqInput.disabled = true;
     if (centerFreqInput) centerFreqInput.disabled = true;
     if (modeSelect) modeSelect.disabled = true;
-    if (txLimitInput2) txLimitInput2.disabled = true;
     vfoButtons.forEach((btn) => btn.disabled = true);
     const jogWheel2 = document.getElementById("jog-wheel");
     if (jogUp) jogUp.disabled = true;
@@ -2032,7 +2035,6 @@ function applyAuthRestrictions() {
         btn.disabled = true;
       }
     });
-    if (txLimitRow2) txLimitRow2.style.opacity = "0.5";
   }
 }
 function applyCapabilities(caps) {
@@ -4250,9 +4252,16 @@ function formatSignal(sUnits) {
   return overDb === 0 ? `${sigUnit("S")}9` : `${sigUnit("S")}9+${overDb}${sigUnit("dB")}`;
 }
 function setDisabled(disabled) {
-  [freqEl, centerFreqEl, modeEl, pttBtn, powerBtn, txLimitInput, txLimitBtn, lockBtn].forEach((el) => {
-    if (el) el.disabled = disabled;
+  const controlDisabled = disabled || authEnabled && !hasAuthRole2("control");
+  const transmitDisabled = disabled || authEnabled && !hasAuthRole2("transmit");
+  [freqEl, centerFreqEl, modeEl, powerBtn, lockBtn].forEach((el) => {
+    if (el) el.disabled = controlDisabled;
   });
+  [pttBtn, txLimitInput, txLimitBtn].forEach((el) => {
+    if (el) el.disabled = transmitDisabled;
+  });
+  const transmitAudio = document.getElementById("tx-audio-btn");
+  if (transmitAudio) transmitAudio.disabled = transmitDisabled || !hasWebCodecs;
   syncModePicker();
 }
 var serverVersion = null;
@@ -7329,6 +7338,10 @@ function startTxAudio() {
     void stopTxAudio();
     return;
   }
+  if (authEnabled && !hasAuthRole2("transmit")) {
+    audioStatus.textContent = "Transmit role required";
+    return;
+  }
   if (!hasWebCodecs) {
     audioStatus.textContent = "Audio requires Chrome/Edge";
     return;

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/background-decode.js

@@ -1,6 +1,6 @@
 import {
   hasAuthRole
-} from "./chunk-FT2RH7BL.js";
+} from "./chunk-PISLBJGN.js";
 import {
   hostState
 } from "./chunk-KL66PICH.js";

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/bookmarks.js

@@ -1,6 +1,6 @@
 import {
   hasAuthRole
-} from "./chunk-FT2RH7BL.js";
+} from "./chunk-PISLBJGN.js";
 import {
   hostCore,
   hostState

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/chunk-PISLBJGN.js

@@ -1,10 +1,11 @@
 // src/api/auth.ts
-var AUTH_ROLES = ["guest", "read", "control", "write", "administrator"];
+var AUTH_ROLES = ["guest", "read", "control", "transmit", "write", "administrator"];
 var AUTH_ADMIN_ROLES = AUTH_ROLES.filter((role) => role !== "guest");
 var AUTH_ROLE_LABELS = {
   guest: "Guest",
   read: "Read",
   control: "Control",
+  transmit: "Transmit",
   write: "Write",
   administrator: "Administrator"
 };
@@ -15,7 +16,7 @@ function normalizeAuthRoles(roles) {
   return AUTH_ROLES.filter((role) => roles.includes(role));
 }
 function hasAuthRole(roles, required) {
-  return roles.includes("administrator") || roles.includes(required) || required === "read" && roles.includes("guest") || required === "read" && roles.includes("control");
+  return roles.includes("administrator") || roles.includes(required) || required === "read" && roles.includes("guest") || required === "read" && (roles.includes("control") || roles.includes("transmit"));
 }
 function hasAccountControls(roles) {
   return roles.length > 0 && !roles.includes("guest");

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/logbook.js

@@ -1,6 +1,6 @@
 import {
   hasAuthRole
-} from "./chunk-FT2RH7BL.js";
+} from "./chunk-PISLBJGN.js";
 import {
   hostCore,
   hostState

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/scheduler.js

@@ -1,6 +1,6 @@
 import {
   hasAuthRole
-} from "./chunk-FT2RH7BL.js";
+} from "./chunk-PISLBJGN.js";
 import {
   hostState
 } from "./chunk-KL66PICH.js";

src/trx-client/trx-frontend/trx-frontend-http/frontend/package.json

@@ -12,7 +12,7 @@
     "typecheck": "tsc --project tsconfig.json && tsc --project tsconfig.worker.json",
     "lint": "eslint \"src/**/*.ts\" \"tests/**/*.mjs\" build.mjs --no-error-on-unmatched-pattern",
     "test": "node --test tests/*.test.mjs",
-    "test:browser": "node tests/browser-smoke.mjs && node tests/spectrum-layout.mjs && node tests/decode-flow.mjs && node tests/tune-links.mjs && node tests/mobile-layout.mjs && node tests/satellite-predictions.mjs && node tests/background-decode.mjs && node tests/logbook.mjs && node tests/account-management.mjs",
+    "test:browser": "node tests/browser-smoke.mjs && node tests/spectrum-layout.mjs && node tests/decode-flow.mjs && node tests/tune-links.mjs && node tests/mobile-layout.mjs && node tests/satellite-predictions.mjs && node tests/background-decode.mjs && node tests/logbook.mjs && node tests/account-management.mjs && node tests/transmit-role.mjs",
     "verify-generated": "npm run generate-types && npm run build && git diff --exit-code -- ../assets/web/generated src/api/generated.ts"
   },
   "devDependencies": {

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/api/auth.ts

@@ -6,12 +6,13 @@ import type { AuthRole } from "./generated.js";
 
 export type { AuthRole };
 
-export const AUTH_ROLES: readonly AuthRole[] = ["guest", "read", "control", "write", "administrator"];
+export const AUTH_ROLES: readonly AuthRole[] = ["guest", "read", "control", "transmit", "write", "administrator"];
 export const AUTH_ADMIN_ROLES: readonly AuthRole[] = AUTH_ROLES.filter(role => role !== "guest");
 export const AUTH_ROLE_LABELS: Readonly<Record<AuthRole, string>> = {
   guest: "Guest",
   read: "Read",
   control: "Control",
+  transmit: "Transmit",
   write: "Write",
   administrator: "Administrator",
 };
@@ -28,7 +29,7 @@ export function hasAuthRole(roles: readonly AuthRole[], required: AuthRole): boo
   return roles.includes("administrator")
     || roles.includes(required)
     || required === "read" && roles.includes("guest")
-    || required === "read" && roles.includes("control");
+    || required === "read" && (roles.includes("control") || roles.includes("transmit"));
 }
 
 export function hasAccountControls(roles: readonly AuthRole[]): boolean {

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/api/generated.ts

@@ -123,7 +123,7 @@ export type RigListResponse = { active_remote: string | null, rigs: Array<RigLis
 
 export type FrontendMeta = { clients: number, rigctl_clients: number, audio_clients: number, rigctl_addr: string | null, active_remote: string | null, remotes: Array<string>, owner_callsign: string | null, owner_website_url: string | null, owner_website_name: string | null, ais_vessel_url_base: string | null, show_sdr_gain_control: boolean, initial_map_zoom: number, spectrum_coverage_margin_hz: number, spectrum_usable_span_ratio: number, bandplan_enabled: boolean, bandplan_region: string, decode_history_retention_min: bigint, server_connected: boolean, };
 
-export type AuthRole = "guest" | "read" | "control" | "write" | "administrator";
+export type AuthRole = "guest" | "read" | "control" | "transmit" | "write" | "administrator";
 
 export type DecoderActivation = "mode_bound" | "toggle";
 

src/trx-client/trx-frontend/trx-frontend-http/frontend/src/app.ts

@@ -584,35 +584,38 @@ function updateAuthUI() {
 function applyAuthRestrictions() {
   if (authRoles.length === 0) return;
 
-  // Disable TX/PTT/frequency/mode/VFO controls for user role
-  if (!hasAuthRole("control")) {
+  if (!hasAuthRole("transmit")) {
     const pttBtn = document.getElementById("ptt-btn") as HTMLButtonElement | null;
+    const txLimitInput = document.getElementById("tx-limit") as HTMLInputElement | null;
+    const txLimitBtn = document.getElementById("tx-limit-btn") as HTMLButtonElement | null;
+    const txAudioBtn = document.getElementById("tx-audio-btn") as HTMLButtonElement | null;
+    const txLimitRow = document.getElementById("tx-limit-row");
+    if (pttBtn) pttBtn.disabled = true;
+    if (txAudioBtn) txAudioBtn.disabled = true;
+    if (txLimitBtn) txLimitBtn.disabled = true;
+    if (txLimitInput) txLimitInput.disabled = true;
+    if (txLimitRow) txLimitRow.style.opacity = "0.5";
+  }
+
+  // General tuning and receive-side controls require Control.
+  if (!hasAuthRole("control")) {
     const powerBtn = document.getElementById("power-btn") as HTMLButtonElement | null;
     const lockBtn = document.getElementById("lock-btn") as HTMLButtonElement | null;
     const freqInput = document.getElementById("freq") as HTMLInputElement | null;
     const centerFreqInput = document.getElementById("center-freq") as HTMLInputElement | null;
     const modeSelect = document.getElementById("mode") as HTMLSelectElement | null;
-    const txLimitInput = document.getElementById("tx-limit") as HTMLInputElement | null;
-    const txLimitBtn = document.getElementById("tx-limit-btn") as HTMLButtonElement | null;
-    const txAudioBtn = document.getElementById("tx-audio-btn") as HTMLButtonElement | null;
-    const txLimitRow = document.getElementById("tx-limit-row");
     const jogUp = document.getElementById("jog-up") as HTMLButtonElement | null;
     const jogDown = document.getElementById("jog-down") as HTMLButtonElement | null;
     const jogButtons = document.querySelectorAll<HTMLButtonElement>(".jog-step button");
     const vfoButtons = document.querySelectorAll<HTMLButtonElement>("#vfo-picker button");
 
-    // Disable TX buttons
-    if (pttBtn) pttBtn.disabled = true;
     if (powerBtn) powerBtn.disabled = true;
     if (lockBtn) lockBtn.disabled = true;
-    if (txAudioBtn) txAudioBtn.disabled = true;
-    if (txLimitBtn) txLimitBtn.disabled = true;
 
     // Disable frequency/mode inputs
     if (freqInput) freqInput.disabled = true;
     if (centerFreqInput) centerFreqInput.disabled = true;
     if (modeSelect) modeSelect.disabled = true;
-    if (txLimitInput) txLimitInput.disabled = true;
 
     // Disable VFO selector
     vfoButtons.forEach(btn => btn.disabled = true);
@@ -656,9 +659,6 @@ function applyAuthRestrictions() {
         btn.disabled = true;
       }
     });
-
-    // Hide TX-specific UI but keep controls visible (disabled)
-    if (txLimitRow) txLimitRow.style.opacity = "0.5";
   }
 }
 
@@ -3080,9 +3080,16 @@ function formatSignal(sUnits: number) {
 }
 
 function setDisabled(disabled: boolean) {
-  [freqEl, centerFreqEl, modeEl, pttBtn, powerBtn, txLimitInput, txLimitBtn, lockBtn].forEach((el) => {
-    if (el) el.disabled = disabled;
+  const controlDisabled = disabled || (authEnabled && !hasAuthRole("control"));
+  const transmitDisabled = disabled || (authEnabled && !hasAuthRole("transmit"));
+  [freqEl, centerFreqEl, modeEl, powerBtn, lockBtn].forEach((el) => {
+    if (el) el.disabled = controlDisabled;
   });
+  [pttBtn, txLimitInput, txLimitBtn].forEach((el) => {
+    if (el) el.disabled = transmitDisabled;
+  });
+  const transmitAudio = document.getElementById("tx-audio-btn") as HTMLButtonElement | null;
+  if (transmitAudio) transmitAudio.disabled = transmitDisabled || !hasWebCodecs;
   syncModePicker();
 }
 
@@ -6370,6 +6377,10 @@ function stopRxAudio() {
 
 function startTxAudio() {
   if (txActive) { void stopTxAudio(); return; }
+  if (authEnabled && !hasAuthRole("transmit")) {
+    audioStatus.textContent = "Transmit role required";
+    return;
+  }
   if (!hasWebCodecs) {
     audioStatus.textContent = "Audio requires Chrome/Edge";
     return;

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/account-management.mjs

@@ -8,7 +8,7 @@ import { startBrowser, startWebFixture } from "./web-fixture.mjs";
 
 /* global document */
 
-const ALL_ROLES = ["read", "control", "write", "administrator"];
+const ALL_ROLES = ["read", "control", "transmit", "write", "administrator"];
 const fixture = await startWebFixture({
   authSession: {
     authenticated: true,

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/auth.test.mjs

@@ -15,13 +15,15 @@ function loadAuth(fetch) {
   return context.AuthApi;
 }
 
-test("role policy centralizes Guest and implied read access", () => {
+test("role policy centralizes Guest and separates Control from Transmit", () => {
   const auth = loadAuth(async () => { throw new Error("unused"); });
-  assert.deepEqual(Array.from(auth.AUTH_ROLES), ["guest", "read", "control", "write", "administrator"]);
+  assert.deepEqual(Array.from(auth.AUTH_ROLES), ["guest", "read", "control", "transmit", "write", "administrator"]);
   assert.equal(auth.hasAuthRole(["guest"], "read"), true);
   assert.equal(auth.hasAccountControls(["guest"]), false);
   assert.equal(auth.hasAccountControls(["read"]), true);
   assert.equal(auth.hasAuthRole(["control"], "read"), true);
+  assert.equal(auth.hasAuthRole(["transmit"], "read"), true);
+  assert.equal(auth.hasAuthRole(["control"], "transmit"), false);
   assert.equal(auth.hasAuthRole(["control"], "write"), false);
   assert.equal(auth.hasAuthRole(["administrator"], "write"), true);
 });

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/bookmarks.test.mjs

@@ -32,7 +32,7 @@ function hostFixture(overrides = {}) {
   const calls = { postPath: [], setRigFrequency: [], armOptimisticFrequency: [], applyLocalTunedFrequency: [], syncBandwidthInput: [], scheduleSpectrumDraw: 0, syncModePicker: 0 };
   const state = {
     authEnabled: false,
-    authRoles: ["read", "control", "write", "administrator"],
+    authRoles: ["read", "control", "transmit", "write", "administrator"],
     lastActiveRigId: null,
     lastRigIds: [],
     lastRigDisplayNames: {},

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/host-fixture.mjs

@@ -19,7 +19,7 @@ export function createHost({ state = {}, core = {}, modules = {} } = {}) {
         serverLat: null,
         serverLon: null,
         authEnabled: false,
-        authRoles: ["read", "control", "write", "administrator"],
+        authRoles: ["read", "control", "transmit", "write", "administrator"],
         lastActiveRigId: null,
         lastRigIds: [],
         lastRigDisplayNames: {},

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/transmit-role.mjs

@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+import assert from "node:assert/strict";
+import { chromium } from "playwright-core";
+import { startBrowser, startWebFixture } from "./web-fixture.mjs";
+
+async function controlState(page) {
+  return {
+    frequency: await page.locator("#freq").isDisabled(),
+    ptt: await page.locator("#ptt-btn").isDisabled(),
+    txAudio: await page.locator("#tx-audio-btn").isDisabled(),
+    txLimit: await page.locator("#tx-limit-btn").isDisabled(),
+  };
+}
+
+async function inspectRole(roles) {
+  const fixture = await startWebFixture({
+    tx: true,
+    authSession: {
+      authenticated: true,
+      username: "operator",
+      roles,
+      auth_disabled: false,
+    },
+  });
+  const session = await startBrowser(chromium);
+  try {
+    await session.page.goto(`${fixture.origin}/`, { waitUntil: "domcontentloaded" });
+    await session.page.locator("#content").waitFor({ state: "visible" });
+    await session.page.waitForTimeout(1200);
+    assert.deepEqual(session.runtimeErrors, []);
+    return await controlState(session.page);
+  } finally {
+    await session.browser.close();
+    await fixture.close();
+  }
+}
+
+assert.deepEqual(await inspectRole(["control"]), {
+  frequency: false,
+  ptt: true,
+  txAudio: true,
+  txLimit: true,
+});
+
+assert.deepEqual(await inspectRole(["transmit"]), {
+  frequency: true,
+  ptt: false,
+  txAudio: false,
+  txLimit: false,
+});

src/trx-client/trx-frontend/trx-frontend-http/frontend/tests/web-fixture.mjs

@@ -145,7 +145,7 @@ export async function startWebFixture({
   bandplanEnabled = false,
   bandplanUnauthorizedFirst = false,
   satPasses = null,
-  authSession = { authenticated: true, roles: ["read", "control", "write", "administrator"], auth_disabled: true },
+  authSession = { authenticated: true, roles: ["read", "control", "transmit", "write", "administrator"], auth_disabled: true },
   users = [],
 } = {}) {
   const rigItems = ["rig-a", "rig-b"].map((remote) => ({

src/trx-client/trx-frontend/trx-frontend-http/src/audio.rs

@@ -737,6 +737,7 @@ pub async fn audio_ws(
     body: web::Payload,
     query: web::Query<AudioQuery>,
     context: web::Data<Arc<FrontendRuntimeContext>>,
+    auth_state: web::Data<crate::server::auth::AuthState>,
 ) -> Result<HttpResponse, Error> {
     let Some(tx_sender) = context.audio.tx.as_ref().cloned() else {
         return Ok(HttpResponse::NotFound().body("audio not enabled"));
@@ -746,6 +747,7 @@ pub async fn audio_ws(
     if !req.headers().contains_key("upgrade") {
         return Ok(HttpResponse::NoContent().finish());
     }
+    let tx_session_id = crate::server::auth::extract_session_id(&req);
 
     // If a channel_id is specified, subscribe to the per-channel broadcaster.
     // The entry is created asynchronously when AUDIO_MSG_VCHAN_ALLOCATED arrives
@@ -880,6 +882,16 @@ pub async fn audio_ws(
                 msg = msg_stream.recv() => {
                     match msg {
                         Some(Ok(Message::Binary(data))) => {
+                            let can_transmit = !auth_state.config.enabled
+                                || crate::server::auth::session_id_grants(
+                                    tx_session_id.as_ref(),
+                                    &auth_state,
+                                    crate::server::auth::AuthRole::Transmit,
+                                );
+                            if !can_transmit {
+                                warn!("Audio WS: closing after unauthorized TX frame");
+                                break;
+                            }
                             let _ = tx_sender.send(Bytes::from(data.to_vec())).await;
                         }
                         Some(Ok(Message::Close(_))) => break,

src/trx-client/trx-frontend/trx-frontend-http/src/auth.rs

@@ -38,6 +38,7 @@ pub enum AuthRole {
     Guest,
     Read,
     Control,
+    Transmit,
     Write,
     Administrator,
 }
@@ -48,22 +49,29 @@ impl AuthRole {
             Self::Guest => "guest",
             Self::Read => "read",
             Self::Control => "control",
+            Self::Transmit => "transmit",
             Self::Write => "write",
             Self::Administrator => "administrator",
         }
     }
 
     pub fn full_access() -> BTreeSet<Self> {
-        [Self::Read, Self::Control, Self::Write, Self::Administrator]
-            .into_iter()
-            .collect()
+        [
+            Self::Read,
+            Self::Control,
+            Self::Transmit,
+            Self::Write,
+            Self::Administrator,
+        ]
+        .into_iter()
+        .collect()
     }
 
     fn grants(self, required: Self) -> bool {
         self == Self::Administrator
             || self == required
             || self == Self::Guest && required == Self::Read
-            || self == Self::Control && required == Self::Read
+            || matches!(self, Self::Control | Self::Transmit) && required == Self::Read
     }
 }
 
@@ -776,7 +784,7 @@ pub struct ChangePasswordRequest {
 }
 
 /// Extract session from cookie
-fn extract_session_id(req: &HttpRequest) -> Option<SessionId> {
+pub fn extract_session_id(req: &HttpRequest) -> Option<SessionId> {
     req.cookie("trx_http_sid")
         .map(|cookie| cookie.value().to_string())
 }
@@ -789,7 +797,18 @@ pub fn get_session_roles(req: &HttpRequest, auth_state: &AuthState) -> Option<Au
 }
 
 pub fn session_grants(req: &HttpRequest, auth_state: &AuthState, role: AuthRole) -> bool {
-    get_session_roles(req, auth_state).is_some_and(|roles| roles_grant(&roles, role))
+    let session_id = extract_session_id(req);
+    session_id_grants(session_id.as_ref(), auth_state, role)
+}
+
+pub fn session_id_grants(
+    session_id: Option<&SessionId>,
+    auth_state: &AuthState,
+    role: AuthRole,
+) -> bool {
+    session_id
+        .and_then(|id| auth_state.store.get(id))
+        .is_some_and(|session| roles_grant(&session.roles, role))
 }
 
 fn require_session(
@@ -1113,12 +1132,14 @@ enum RouteAccess {
     Account,
     /// Read-only resources (Guest, Read, Control, or Administrator required)
     Read,
-    /// Bookmarks (Guest, Read, Control, Write, or Administrator required)
+    /// Bookmarks (Guest, Read, Control, Transmit, Write, or Administrator required)
     ReadWrite,
     /// Logbook access (Write or Administrator required)
     Write,
     /// Radio control (Control or Administrator required)
     Control,
+    /// Transmit actions (Transmit or Administrator required)
+    Transmit,
     /// Managed-account administration.
     Administrator,
 }
@@ -1146,6 +1167,9 @@ impl RouteAccess {
         if path == "/auth/users" || path.starts_with("/auth/users/") {
             return Self::Administrator;
         }
+        if path == "/set_ptt" || path == "/set_tx_limit" {
+            return Self::Transmit;
+        }
 
         // Static assets.  The band plan is one of them: it is compiled into the
         // binary and identical for every user, but ".json" is not an asset
@@ -1206,6 +1230,7 @@ impl RouteAccess {
                 .is_some_and(|roles| roles_grant_any(roles, &[AuthRole::Read, AuthRole::Write])),
             Self::Write => roles.is_some_and(|roles| roles_grant(roles, AuthRole::Write)),
             Self::Control => roles.is_some_and(|roles| roles_grant(roles, AuthRole::Control)),
+            Self::Transmit => roles.is_some_and(|roles| roles_grant(roles, AuthRole::Transmit)),
             Self::Administrator => {
                 roles.is_some_and(|roles| roles_grant(roles, AuthRole::Administrator))
             }
@@ -1379,6 +1404,11 @@ mod tests {
             RouteAccess::Control
         );
         assert_eq!(RouteAccess::from_path("/set_mode"), RouteAccess::Control);
+        assert_eq!(RouteAccess::from_path("/set_ptt"), RouteAccess::Transmit);
+        assert_eq!(
+            RouteAccess::from_path("/set_tx_limit"),
+            RouteAccess::Transmit
+        );
     }
 
     #[test]
@@ -1386,6 +1416,7 @@ mod tests {
         let guest = roles(&[AuthRole::Guest]);
         let read = roles(&[AuthRole::Read]);
         let control = roles(&[AuthRole::Control]);
+        let transmit = roles(&[AuthRole::Transmit]);
         let write = roles(&[AuthRole::Write]);
         let administrator = roles(&[AuthRole::Administrator]);
         assert!(RouteAccess::Public.allows(None));
@@ -1399,6 +1430,7 @@ mod tests {
         assert!(RouteAccess::Read.allows(Some(&guest)));
         assert!(RouteAccess::Read.allows(Some(&read)));
         assert!(RouteAccess::Read.allows(Some(&control)));
+        assert!(RouteAccess::Read.allows(Some(&transmit)));
         assert!(!RouteAccess::Read.allows(Some(&write)));
         assert!(RouteAccess::Read.allows(Some(&administrator)));
 
@@ -1413,7 +1445,11 @@ mod tests {
         assert!(!RouteAccess::Control.allows(None));
         assert!(!RouteAccess::Control.allows(Some(&read)));
         assert!(RouteAccess::Control.allows(Some(&control)));
+        assert!(!RouteAccess::Control.allows(Some(&transmit)));
         assert!(RouteAccess::Control.allows(Some(&administrator)));
+        assert!(!RouteAccess::Transmit.allows(Some(&control)));
+        assert!(RouteAccess::Transmit.allows(Some(&transmit)));
+        assert!(RouteAccess::Transmit.allows(Some(&administrator)));
         assert!(!RouteAccess::Administrator.allows(Some(&control)));
         assert!(RouteAccess::Administrator.allows(Some(&administrator)));
     }
@@ -1442,6 +1478,28 @@ mod tests {
         assert!(store.get(&session_id).is_none());
     }
 
+    #[test]
+    fn transmit_grant_tracks_live_session_revocation() {
+        let directory = tempfile::tempdir().unwrap();
+        let state = AuthState::new(test_auth_config(directory.path().join("users.json"))).unwrap();
+        let session_id = state.store.create(
+            "operator".to_string(),
+            roles(&[AuthRole::Transmit]),
+            Duration::from_secs(3600),
+        );
+        assert!(session_id_grants(
+            Some(&session_id),
+            &state,
+            AuthRole::Transmit
+        ));
+        state.store.remove(&session_id);
+        assert!(!session_id_grants(
+            Some(&session_id),
+            &state,
+            AuthRole::Transmit
+        ));
+    }
+
     #[test]
     fn user_store_bootstraps_and_manages_users() {
         let directory = tempfile::tempdir().unwrap();