jtmorris/dms_tailscalectl
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feat: lazy on-demand true egress public IP check (#54)

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Replace status-Addrs public IP with user-triggered curl probes
(api.ipify.org, icanhazip.com). Shown as "tap to check" until fetched;
cleared on disconnect or exit-node change. Direct argv, fallback chain,
busy-mutex shared with other actions.

v0.2.3

Written by AI agent working for @jtmorris. Model: Grok 4.5.
This commit is contained in:
Ebeneezer (Hermes Agent) 2026-07-15 01:35:53 -07:00
parent 108e77a024
commit 6a586119be
6 changed files with 158 additions and 141 deletions
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8
README.md
View file

@ -2,7 +2,7 @@
A lightweight widget plugin that shows Tailscale connectivity status on the Dank Bar with quick controls for toggling connection, switching exit nodes, and copying peer addresses.
![Tailscale Widget v0.2.2](resources/dms_tailscalectl_v0.1.0.png)
![Tailscale Widget v0.2.3](resources/dms_tailscalectl_v0.1.0.png)
## Features
@ -10,7 +10,7 @@ A lightweight widget plugin that shows Tailscale connectivity status on the Dank
- **Right-click** to toggle Tailscale on/off
- **Left-click** to open a popout showing:
- Your current Tailscale IP (when connected)
- Public IP derived from Tailscale endpoint addresses (Self, or active exit-node peer when one is selected)
- Public IP via **on-demand true egress check** (tap to run `curl` to ipify/icanhazip; not auto-fetched on status poll)
- Active exit node (with clear button)
- Peer list with hostnames and IPs (when connected)
- A clear "Not connected" empty state when disconnected (no stale peer list)
@ -81,7 +81,7 @@ A lightweight widget plugin that shows Tailscale connectivity status on the Dank
"component": "./TailscaleWidget.qml",
"permissions": ["process"],
"requires": ["tailscale"],
"version": "0.2.2"
"version": "0.2.3"
}
```
@ -92,7 +92,7 @@ A lightweight widget plugin that shows Tailscale connectivity status on the Dank
- Follows current `dms-plugin-dev` + DMS 1.4 plugin best practices (capabilities, requires, no raw Process for one-shots, etc.).
- Toggle uses intentional defensive poll-act-poll; a failed status poll aborts the pending toggle (does not invent `up`/`down`).
- When `BackendState` is not `Running`, peer list / exit node / self IP are cleared so the UI never shows a stale connected-looking peer list.
- Public IP is derived from `Self.Addrs` (or the active exit-node peer's `Addrs` when an exit node is selected). No external HTTP probe.
- Public IP is a **lazy true-egress lookup**: tap "Public IP: tap to check" to probe via `curl` (`api.ipify.org`, then `icanhazip.com`). Cleared on disconnect or exit-node change. Not derived from `Self.Addrs`.
- Status row uses `RowLayout` with a real `Layout.fillWidth` spacer (not a no-op on plain `Row`).
- Peer `ListView` uses `Flickable.StopAtBounds` (no desktop rubber-band overshoot).

131
tailscalectl/TailscaleWidget.qml
View file

@ -11,17 +11,20 @@ PluginComponent {
property bool isConnected: false
property string tailscaleIP: ""
// Lazy true-egress IP — only filled by explicit user-triggered check (#54).
property string publicIP: ""
property bool publicIPLoading: false
property string currentExitNode: ""
property var peers: []
property string _copyText: ""
property int _copyIndex: 0
property int _egressIndex: 0
// Transient coordination for defensive poll-act-poll toggle (not long-term cache).
// Poll for ground truth → act → poll again for verification.
property string _pendingAction: ""
// Single-flight guard: prevent interleaved status/toggle/exit/copy chains (#15/#30 class).
// Single-flight guard: prevent interleaved status/toggle/exit/copy/egress chains.
property bool _busy: false
layerNamespacePlugin: "tailscalectl"
@ -32,67 +35,65 @@ PluginComponent {
root._runStatusCheck();
}
function _applyStatusState(state) {
// Invalidate lazy public IP when connectivity or exit node changes.
if (!state.isConnected || state.currentExitNode !== root.currentExitNode) {
root.publicIP = "";
root.publicIPLoading = false;
}
root.isConnected = state.isConnected;
root.tailscaleIP = state.tailscaleIP;
root.currentExitNode = state.currentExitNode;
root.peers = state.peers;
}
function _clearConnectionState() {
root.isConnected = false;
root.tailscaleIP = "";
root.publicIP = "";
root.publicIPLoading = false;
root.currentExitNode = "";
root.peers = [];
}
function _runStatusCheck() {
if (root._busy && root._pendingAction === "") {
// A non-toggle status refresh while something is already in flight: skip.
// Toggle path sets _pendingAction first and is allowed to chain after actions clear busy carefully.
return;
}
root._busy = true;
Proc.runCommand("tailscale-status", TailscaleLib.getStatusCommand(), (stdout, code) => {
var statusOk = (code === 0);
if (statusOk) {
const state = TailscaleLib.parseStatusResult(stdout);
root.isConnected = state.isConnected;
root.tailscaleIP = state.tailscaleIP;
root.publicIP = state.publicIP;
root.currentExitNode = state.currentExitNode;
root.peers = state.peers;
root._applyStatusState(TailscaleLib.parseStatusResult(stdout));
} else {
root.isConnected = false;
root.tailscaleIP = "";
root.publicIP = "";
root.currentExitNode = "";
root.peers = [];
root._clearConnectionState();
ToastService.showError("tailscalectl", I18n.tr(TailscaleLib.formatError("status")));
}
const cmd = TailscaleLib.commandForPendingAction(root._pendingAction, root.isConnected, statusOk);
if (cmd) {
// Fresh poll succeeded; act, then verify with another status poll.
Proc.runCommand("tailscale-toggle", cmd, (out, c) => {
if (c !== 0) {
const action = root.isConnected ? "disconnect" : "connect";
ToastService.showError("tailscalectl", I18n.tr(TailscaleLib.formatError(action)));
}
root._pendingAction = "";
// Keep busy through verification poll: call internal runner that assumes we own the lock.
root._runStatusCheckUnlocked();
});
} else {
// Includes failed status while a toggle was pending: abort rather than invent up/down.
root._pendingAction = "";
root._busy = false;
}
});
}
// Used only as the continuation after toggle action; assumes _busy is already true.
// Continuation after toggle/exit; assumes _busy is already true.
function _runStatusCheckUnlocked() {
Proc.runCommand("tailscale-status", TailscaleLib.getStatusCommand(), (stdout, code) => {
if (code === 0) {
const state = TailscaleLib.parseStatusResult(stdout);
root.isConnected = state.isConnected;
root.tailscaleIP = state.tailscaleIP;
root.publicIP = state.publicIP;
root.currentExitNode = state.currentExitNode;
root.peers = state.peers;
root._applyStatusState(TailscaleLib.parseStatusResult(stdout));
} else {
root.isConnected = false;
root.tailscaleIP = "";
root.publicIP = "";
root.currentExitNode = "";
root.peers = [];
root._clearConnectionState();
ToastService.showError("tailscalectl", I18n.tr(TailscaleLib.formatError("status")));
}
root._busy = false;
@ -124,11 +125,13 @@ PluginComponent {
return;
}
root._busy = true;
// Exit-node change invalidates any previously checked egress IP.
root.publicIP = "";
root.publicIPLoading = false;
Proc.runCommand("tailscale-exit", cmd, (stdout, code) => {
if (code !== 0) {
ToastService.showError("tailscalectl", I18n.tr(TailscaleLib.formatError("set")));
}
// Verify via unlocked status continuation (busy already held).
root._runStatusCheckUnlocked();
});
}
@ -161,6 +164,54 @@ PluginComponent {
});
}
// #54: on-demand true egress check (lazy). Click "tap to check" to run.
function fetchPublicIP() {
if (root._busy || !root.isConnected || root.publicIPLoading) {
return;
}
root._busy = true;
root.publicIPLoading = true;
root._egressIndex = 0;
root._runNextEgressCheck();
}
function _runNextEgressCheck() {
const cmds = TailscaleLib.getEgressCheckCommands();
if (root._egressIndex >= cmds.length) {
root.publicIPLoading = false;
root._busy = false;
ToastService.showError("tailscalectl", I18n.tr(TailscaleLib.formatError("egress")));
return;
}
Proc.runCommand("tailscale-egress-" + root._egressIndex, cmds[root._egressIndex], (stdout, code) => {
if (code === 0) {
const ip = TailscaleLib.parseEgressCheckResponse(stdout);
if (ip !== "") {
root.publicIP = ip;
root.publicIPLoading = false;
root._busy = false;
return;
}
}
root._egressIndex += 1;
root._runNextEgressCheck();
});
}
function onPublicIpRowClicked() {
if (!root.isConnected) {
return;
}
if (root.publicIPLoading) {
return;
}
if (root.publicIP !== "") {
root.copyToClipboard(root.publicIP);
return;
}
root.fetchPublicIP();
}
popoutContent: Component {
PopoutComponent {
headerText: I18n.tr(TailscaleLib.getStrings().header)
@ -172,7 +223,7 @@ PluginComponent {
width: parent.width
height: Theme.spacingM + statusRow.implicitHeight
+ Theme.spacingXS
+ (root.isConnected && root.publicIP !== "" ? Theme.fontSizeSmall + Theme.spacingXS : 0)
+ (root.isConnected ? Theme.fontSizeSmall + Theme.spacingXS : 0)
+ Theme.spacingM + peerArea.height + Theme.spacingM
RowLayout {
@ -243,10 +294,10 @@ PluginComponent {
}
}
// #54: public egress IP (status-derived from Self/exit-node endpoints)
// #54: lazy true-egress public IP (on-demand only)
MouseArea {
id: publicIpRow
visible: root.isConnected && root.publicIP !== ""
visible: root.isConnected
y: Theme.spacingM + statusRow.implicitHeight + Theme.spacingXS
anchors.left: parent.left
anchors.leftMargin: Theme.spacingM
@ -255,12 +306,21 @@ PluginComponent {
cursorShape: Qt.PointingHandCursor
hoverEnabled: true
onClicked: {
root.copyToClipboard(root.publicIP);
root.onPublicIpRowClicked();
}
StyledText {
id: publicIpText
text: I18n.tr(TailscaleLib.getStrings().publicIPPrefix) + root.publicIP
text: {
var prefix = I18n.tr(TailscaleLib.getStrings().publicIPPrefix);
if (root.publicIPLoading) {
return prefix + I18n.tr(TailscaleLib.getStrings().publicIPLoading);
}
if (root.publicIP !== "") {
return prefix + root.publicIP;
}
return prefix + I18n.tr(TailscaleLib.getStrings().publicIPTapHint);
}
font.pixelSize: Theme.fontSizeSmall
color: Theme.surfaceVariantText
}
@ -295,7 +355,6 @@ PluginComponent {
anchors.fill: parent
model: root.peers
interactive: true
// Desktop popout: no rubber-band overshoot (#27).
boundsBehavior: Flickable.StopAtBounds
clip: true

3
tailscalectl/i18n/en.json
View file

@ -4,6 +4,8 @@
"Disconnected": "Disconnected",
"Exit node: ": "Exit node: ",
"Public IP: ": "Public IP: ",
"tap to check": "tap to check",
"checking…": "checking…",
"None": "None",
"Copied %1 to clipboard": "Copied %1 to clipboard",
"Invalid exit node hostname": "Invalid exit node hostname",
@ -13,5 +15,6 @@
"Failed to set exit node": "Failed to set exit node",
"Failed to read Tailscale status": "Failed to read Tailscale status",
"Error copying to clipboard": "Error copying to clipboard",
"Failed to look up public IP": "Failed to look up public IP",
"Tailscale command failed": "Tailscale command failed"
}

74
tailscalectl/lib.js
View file

@ -36,19 +36,6 @@ function findActiveExitNode(peerMap) {
return "";
}
function findActiveExitNodePeer(peerMap) {
if (!peerMap) {
return null;
}
for (const key of Object.keys(peerMap)) {
const p = peerMap[key];
if (p.ExitNode) {
return p;
}
}
return null;
}
// Strip host from endpoint strings like "1.2.3.4:41641" or "[2001:db8::1]:41641".
function hostFromEndpoint(endpoint) {
if (typeof endpoint !== "string" || endpoint === "") {
@ -66,11 +53,10 @@ function hostFromEndpoint(endpoint) {
if (colon > -1 && endpoint.indexOf(":") === colon) {
return endpoint.slice(0, colon);
}
// Bare address (or unusual form): return as-is.
return endpoint;
}
// IPv4 only for display simplicity. Reject private, loopback, link-local, and CGNAT (100.64/10).
// IPv4 only. Reject private, loopback, link-local, and CGNAT (100.64/10).
function isPublicIPv4(ip) {
if (typeof ip !== "string" || ip === "") {
return false;
@ -89,54 +75,42 @@ function isPublicIPv4(ip) {
if (a === 0 || a === 127 || a >= 224) {
return false;
}
// 10.0.0.0/8
if (a === 10) {
return false;
}
// 172.16.0.0/12
if (a === 172 && b >= 16 && b <= 31) {
return false;
}
// 192.168.0.0/16
if (a === 192 && b === 168) {
return false;
}
// 100.64.0.0/10 (CGNAT / Tailscale range)
if (a === 100 && b >= 64 && b <= 127) {
return false;
}
// 169.254.0.0/16 link-local
if (a === 169 && b === 254) {
return false;
}
return true;
}
function extractPublicIPFromAddrs(addrs) {
if (!addrs || !addrs.length) {
return "";
}
for (var i = 0; i < addrs.length; i++) {
var host = hostFromEndpoint(addrs[i]);
if (isPublicIPv4(host)) {
return host;
}
}
return "";
// Ordered true-egress probes (IPv4). First success wins. Direct argv only — no shell.
// Lazy / on-demand only; never run from the periodic status path.
function getEgressCheckCommands() {
return [
["curl", "-4", "-sS", "--max-time", "5", "https://api.ipify.org"],
["curl", "-4", "-sS", "--max-time", "5", "https://icanhazip.com"]
];
}
// Prefer exit-node peer endpoints when an exit node is active (closer to egress seen by websites).
// Otherwise use Self.Addrs. This is status-derived, not an external probe.
function resolvePublicIP(selfNode, peerMap) {
var exitPeer = findActiveExitNodePeer(peerMap);
if (exitPeer && exitPeer.Addrs) {
var viaExit = extractPublicIPFromAddrs(exitPeer.Addrs);
if (viaExit) {
return viaExit;
}
// Parse curl stdout from an egress checker into a public IPv4, or "" if unusable.
function parseEgressCheckResponse(stdout) {
if (typeof stdout !== "string") {
return "";
}
if (selfNode && selfNode.Addrs) {
return extractPublicIPFromAddrs(selfNode.Addrs);
var line = stdout.trim().split(/\r?\n/)[0] || "";
line = line.trim();
if (isPublicIPv4(line)) {
return line;
}
return "";
}
@ -159,6 +133,8 @@ function getStrings() {
disconnected: "Disconnected",
exitNodePrefix: "Exit node: ",
publicIPPrefix: "Public IP: ",
publicIPTapHint: "tap to check",
publicIPLoading: "checking…",
none: "None",
copied: "Copied %1 to clipboard",
invalidExitNodeHostname: "Invalid exit node hostname",
@ -179,7 +155,6 @@ function isValidExitNodeHostname(hostname) {
if (hostname.length > 253) {
return false;
}
// Each label: alnum start/end, alnum/hyphen/underscore inside; dots separate labels.
return /^(?=.{1,253}$)([a-zA-Z0-9]([a-zA-Z0-9_-]{0,61}[a-zA-Z0-9])?)(\.([a-zA-Z0-9]([a-zA-Z0-9_-]{0,61}[a-zA-Z0-9])?))*$/.test(hostname);
}
@ -187,7 +162,6 @@ function emptyStatusState() {
return {
isConnected: false,
tailscaleIP: "",
publicIP: "",
currentExitNode: "",
peers: []
};
@ -206,7 +180,6 @@ function parseStatusResult(jsonText) {
return {
isConnected: true,
tailscaleIP: (selfNode.TailscaleIPs && selfNode.TailscaleIPs[0]) || "",
publicIP: resolvePublicIP(selfNode, peerMap),
currentExitNode: findActiveExitNode(peerMap),
peers: parsePeers(peerMap)
};
@ -219,7 +192,6 @@ function buildToggleCommand(isConnected) {
return isConnected ? ["tailscale", "down"] : ["tailscale", "up"];
}
// Single source of truth for the status command used for on-demand and post-action verification.
function getStatusCommand() {
return ["tailscale", "status", "--json"];
}
@ -232,12 +204,12 @@ function errorMessage(cmd) {
"disconnect": "Failed to disconnect from Tailscale",
"set": "Failed to set exit node",
"status": "Failed to read Tailscale status",
"clipboard": "Error copying to clipboard"
"clipboard": "Error copying to clipboard",
"egress": "Failed to look up public IP"
};
return messages[cmd] || "Tailscale command failed";
}
// Central error formatting for the widget. detail is optional truncated stderr or extra context.
function formatError(action, detail) {
var base = errorMessage(action);
if (detail && detail.length > 0) {
@ -251,8 +223,6 @@ const PendingAction = Object.freeze({
TOGGLE: "toggle"
});
// statusOk must be true (successful status poll) before acting on pending toggle.
// Never invent up/down from a failed poll (would force "up" after clearing isConnected).
function commandForPendingAction(pending, freshIsConnected, statusOk) {
if (!statusOk) {
return null;
@ -280,7 +250,7 @@ if (typeof module !== "undefined" && module.exports) {
commandForPendingAction,
hostFromEndpoint,
isPublicIPv4,
extractPublicIPFromAddrs,
resolvePublicIP
getEgressCheckCommands,
parseEgressCheckResponse
};
}

2
tailscalectl/plugin.json
View file

@ -9,5 +9,5 @@
"component": "./TailscaleWidget.qml",
"permissions": ["process"],
"requires": ["tailscale"],
"version": "0.2.2"
"version": "0.2.3"
}

81
test/lib.test.js
View file

@ -384,7 +384,7 @@ test("lib does not export trivial UI predicates shouldShowClearExitNode / isActi
assert.strictEqual(lib.isActiveExitNode, undefined);
});
// --- public IP extraction (#54) ---
// --- on-demand public egress check (#54) ---
test("hostFromEndpoint strips port from IPv4 endpoint", () => {
assert.strictEqual(lib.hostFromEndpoint("76.87.221.174:41641"), "76.87.221.174");
@ -409,68 +409,53 @@ test("isPublicIPv4 accepts global unicast and rejects private/CGNAT/loopback", (
assert.strictEqual(lib.isPublicIPv4(""), false);
});
test("extractPublicIPFromAddrs returns first public IPv4 from endpoint list", () => {
const addrs = [
"10.0.3.103:41641",
"76.87.221.174:45609",
"76.87.221.174:41641",
"172.17.0.1:41641"
];
assert.strictEqual(lib.extractPublicIPFromAddrs(addrs), "76.87.221.174");
test("getEgressCheckCommands returns direct curl argv lists (no shell)", () => {
const cmds = lib.getEgressCheckCommands();
assert.ok(Array.isArray(cmds));
assert.ok(cmds.length >= 2);
cmds.forEach((cmd) => {
assert.strictEqual(cmd[0], "curl");
assert.ok(cmd.includes("-4"));
assert.ok(cmd.includes("-sS") || cmd.includes("-s"));
assert.ok(cmd.some((a) => String(a).startsWith("https://")));
});
});
test("extractPublicIPFromAddrs returns empty when no public IP", () => {
assert.strictEqual(lib.extractPublicIPFromAddrs(["10.0.0.1:1", "100.64.0.1:1"]), "");
assert.strictEqual(lib.extractPublicIPFromAddrs(null), "");
assert.strictEqual(lib.extractPublicIPFromAddrs([]), "");
test("parseEgressCheckResponse accepts trimmed public IPv4", () => {
assert.strictEqual(lib.parseEgressCheckResponse("76.87.221.174\n"), "76.87.221.174");
assert.strictEqual(lib.parseEgressCheckResponse(" 8.8.8.8 "), "8.8.8.8");
});
test("parseStatusResult includes publicIP from Self.Addrs when Running and no exit node (#54)", () => {
test("parseEgressCheckResponse rejects garbage private and empty", () => {
assert.strictEqual(lib.parseEgressCheckResponse(""), "");
assert.strictEqual(lib.parseEgressCheckResponse("not an ip"), "");
assert.strictEqual(lib.parseEgressCheckResponse("10.0.0.1"), "");
assert.strictEqual(lib.parseEgressCheckResponse("100.64.0.1"), "");
assert.strictEqual(lib.parseEgressCheckResponse(null), "");
});
test("parseStatusResult does not auto-fill publicIP (lazy egress is separate)", () => {
const json = JSON.stringify({
BackendState: "Running",
Self: {
TailscaleIPs: ["100.64.0.5"],
Addrs: ["10.0.0.2:41641", "203.0.113.10:41641"]
Addrs: ["203.0.113.10:41641"]
},
Peer: {}
});
const state = lib.parseStatusResult(json);
assert.strictEqual(state.publicIP, "203.0.113.10");
assert.strictEqual(state.isConnected, true);
assert.strictEqual(state.tailscaleIP, "100.64.0.5");
assert.strictEqual(state.publicIP, undefined);
});
test("parseStatusResult prefers active exit node peer Addrs for publicIP (#54 egress)", () => {
const json = JSON.stringify({
BackendState: "Running",
Self: {
TailscaleIPs: ["100.64.0.5"],
Addrs: ["198.51.100.1:41641"]
},
Peer: {
"exit-key": {
HostName: "gluetun-sjc",
ExitNode: true,
ExitNodeOption: true,
TailscaleIPs: ["100.64.0.9"],
Addrs: ["10.1.1.1:41641", "203.0.113.50:41641"]
}
}
});
const state = lib.parseStatusResult(json);
assert.strictEqual(state.currentExitNode, "gluetun-sjc");
assert.strictEqual(state.publicIP, "203.0.113.50");
test("getStrings includes public IP lazy-load strings", () => {
const s = lib.getStrings();
assert.ok(s.publicIPPrefix);
assert.ok(s.publicIPTapHint);
assert.ok(s.publicIPLoading);
});
test("parseStatusResult clears publicIP when not Running (#55 + #54)", () => {
const json = JSON.stringify({
BackendState: "Stopped",
Self: { TailscaleIPs: ["100.64.0.5"], Addrs: ["203.0.113.10:41641"] },
Peer: {}
});
const state = lib.parseStatusResult(json);
assert.strictEqual(state.publicIP, "");
});
test("getStrings includes publicIPPrefix", () => {
assert.ok(lib.getStrings().publicIPPrefix);
test("errorMessage includes egress failure", () => {
assert.strictEqual(lib.errorMessage("egress"), "Failed to look up public IP");
});