feat(client): cross-target input handling + LAN mDNS discovery

Input handling, building on macOS/iOS/tvOS: - macOS recapture after navigating out: engageCapture no longer latches captured=true when the cursor grab is refused mid app-activation (which left a free cursor that no later click could re-grab); cursorCapture.capture() now reports success. + canBecomeKeyView. - iOS/iPadOS recapture: restore the prior capture on didBecomeActive (nothing re-grabbed mouse/keyboard on return before). - iPad indirect pointer (no lock) is forwarded as an absolute MOUSE (move + buttons + scroll via hover / UITouch.indirectPointer), not as touch, with the local cursor visible; GCMouse owns the locked regime, gated so the two never double-send. Adds the MouseMoveAbs wire helper. - Trackpad scroll on iOS (was entirely missing): GCMouse scroll dpad when locked + a scroll-only UIPanGestureRecognizer otherwise. - tvOS: no focusable control during play (a focusable Disconnect button ate the controller's A in the focus engine); Siri Remote Menu disconnects. - Don't leak touch to the host under the TOFU trust prompt (gate on captureEnabled). LAN discovery: HostDiscovery (NWBrowser over _punktfunk._udp, the host's crate::discovery advert) resolves each service to IP:port and parses the TXT (fp advisory, pair, id); an "On this network" section in the grid (tap to save + connect, or pair if required). iOS/tvOS get NSBonjourServices via a merged Config/Info.plist. Integration-tested end to end against a fake NWListener advert. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-12 14:05:21 +02:00
parent 6b4de5d738
commit 6d3ff37d9e
9 changed files with 723 additions and 83 deletions
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<!-- Custom keys merged into the auto-generated Info.plist (GENERATE_INFOPLIST_FILE=YES
+	     supplies the rest). NSBonjourServices is required for NWBrowser to browse this
+	     service type on iOS/tvOS — without it the system blocks the browse and discovery
+	     returns nothing. Kept OUT of the synchronized App/ + Sources/ groups so it isn't
+	     auto-added as a bundle resource (which collides with Info.plist processing). -->
+	<key>NSBonjourServices</key>
+	<array>
+		<string>_punktfunk._udp</string>
+	</array>
+</dict>
+</plist>
@@ -361,6 +361,7 @@
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = F4H37KF6WC;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Punktfunkempfänger";
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
@@ -394,6 +395,7 @@
 				DEAD_CODE_STRIPPING = YES;
 				DEVELOPMENT_TEAM = F4H37KF6WC;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Punktfunkempfänger";
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
@@ -423,6 +425,7 @@
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = F4H37KF6WC;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Punktfunkempfänger";
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
@@ -460,6 +463,7 @@
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = F4H37KF6WC;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Punktfunkempfänger";
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
@@ -496,6 +500,7 @@
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = F4H37KF6WC;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Punktfunkempfänger";
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
@@ -524,6 +529,7 @@
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_TEAM = F4H37KF6WC;
 				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = "Punktfunkempfänger";
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
@@ -39,9 +39,10 @@ What's here, all compiled and tested on macOS (Xcode 26.5 / Swift 6.3):
    thread per view, token-cancelled so reconnects can't double-pump.
  - `InputCapture.swift` — `GCMouse` raw deltas + `GCKeyboard` HID→VK mapping (the host's
    `vk_to_evdev` consumes Windows VKs), with fractional-delta accumulation so sub-pixel
-    motion isn't truncated away. Buttons use GameStream ids (1=left … 5=X2). Scroll
-    arrives via the stream view's `scrollWheel` override instead of GC (trackpad/Magic
-    Mouse gestures never reach GCMouse's scroll dpad), WHEEL_DELTA(120)-scaled.
+    motion isn't truncated away. Buttons use GameStream ids (1=left … 5=X2). Scroll is
+    WHEEL_DELTA(120)-scaled: macOS via the stream view's `scrollWheel` override, iPad via
+    GCMouse's scroll dpad when pointer-locked and a scroll-only `UIPanGestureRecognizer`
+    otherwise (trackpad gestures never reach GC's scroll dpad).
  - `GamepadManager.swift` — app-lifetime controller discovery + selection (`.shared`):
    watches `GCController` connect/disconnect, fingerprints each pad for the Settings UI
    (name, capabilities, battery), and selects the ONE controller forwarded to the host
@@ -56,8 +57,15 @@ What's here, all compiled and tested on macOS (Xcode 26.5 / Swift 6.3):
    locality) and `nextHidOutput()` (lightbar → `GCDeviceLight`, player LEDs →
    `playerIndex`, adaptive-trigger effect blocks → a total, table-driven parser →
    `GCDualSenseAdaptiveTrigger`, exact for the 10-zone positional modes).
- **`PunktfunkClient`** (the app): hosts grid (saved in UserDefaults), "+" toolbar
-  sheet to add hosts, stream mode in Settings (⌘,), two trust flows — the
+  - `HostDiscovery.swift` — LAN auto-discovery: an `NWBrowser` over `_punktfunk._udp`
+    (the host's `crate::discovery` mDNS advert), resolving each service to an IP:port via a
+    throwaway `NWConnection` and parsing the TXT (`fp` advisory cert fingerprint, `pair`,
+    stable `id`). iOS/tvOS need `NSBonjourServices` (`Config/Info.plist`) or the system
+    blocks the browse.
+- **`PunktfunkClient`** (the app): hosts grid (saved in UserDefaults) with an **On this
+  network** section listing mDNS-discovered hosts (tap to save + connect, or pair if the
+  host requires it), "+" toolbar sheet to add hosts manually, stream mode in Settings (⌘,),
+  two trust flows — the
  trust-on-first-use fingerprint prompt over the live-but-blurred stream, and SPAKE2 PIN
  pairing (`PairSheet`, from a host card's context menu or the trust prompt;
  `ClientIdentityStore` keeps the client identity in the Keychain and presents it on
@@ -74,16 +82,25 @@ What's here, all compiled and tested on macOS (Xcode 26.5 / Swift 6.3):
  ("Controller type": Automatic / Xbox 360 / DualSense — Automatic matches the physical
  pad; resolved at connect time, the host pad is fixed per session). Gamepad capture +
  feedback run with streaming (`SessionModel` owns them, same trust gate as audio).
+  Settings also sets the **Bitrate** (Automatic toggle = host default; manual is a
+  log-scale slider, 2 Mbps – 3 Gbps, snapped to two significant figures — above 1 Gbps
+  an inline warning says to run a speed test first; tvOS uses a preset picker instead,
+  Slider doesn't exist there; negotiated via the Hello on every connect), and a host
+  card's context menu offers **"Test Network Speed…"** (`SpeedTestSheet`): connects, has
+  the host burst probe filler over the real data plane (up to the host's 3 Gbps probe
+  ceiling for 2 s, roadmap §9),
+  shows measured goodput · loss · a recommended bitrate (≈70% of measured), and applies
+  it in one tap.
 - **Tests** (`swift test`): byte-level Annex-B units; a real-codec round trip
  (VTCompressionSession-encoded HEVC rebuilt as the host's wire shape → `AnnexB` →
  VTDecompressionSession → pixels); table-driven DualSense trigger-effect parsing
  (`DualSenseTriggerEffectTests`) and the gamepad wire conversions
  (`GamepadWireTests`); loopback integration against real local hosts
-  (`test-loopback.sh` — stream round trip incl. gamepad/touchpad/motion sends and a
+  (`test-loopback.sh` — stream round trip incl. gamepad/touchpad/motion sends, a
  host-scripted feedback burst asserted on the rumble + HID-output planes
-  (`PUNKTFUNK_TEST_FEEDBACK=1`), plus the PIN pairing ceremony and the
-  `--require-pairing` gate against a second, armed host); the remote first-light test
-  above.
+  (`PUNKTFUNK_TEST_FEEDBACK=1`), the bitrate-negotiation echo and a real 20 Mbps
+  bandwidth probe, plus the PIN pairing ceremony and the `--require-pairing` gate
+  against a second, armed host); the remote first-light test above.

 ## Build / run / test (on a Mac)

@@ -224,23 +241,31 @@ signing, bundle id `io.unom.punktfunk`. Notes:
   as the macOS one, so the SwiftUI shell is identical) hosts the shared `StreamPump` in
   a view controller for `prefersPointerLocked`: with a hardware mouse/trackpad that is
   the iPadOS cursor capture (system honors it fullscreen-and-frontmost; in Stage
-   Manager it degrades to both-cursors forwarding). Touch is always forwarded — every
-   finger gets a wire touch id and coordinates map through the aspect-fit letterbox
-   into host-mode pixels (surface == host mode, so the host rescale is the identity).
+   Manager it degrades to absolute-mouse forwarding). Input is routed by kind: DIRECT
+   fingers / Pencil are touches (each gets a wire touch id, coordinates mapped through the
+   aspect-fit letterbox into host-mode pixels — surface == host mode, so the host rescale is
+   the identity), while a mouse/trackpad is a MOUSE — pointer-LOCKED it is GCMouse relative
+   deltas; unlocked it is absolute moves + buttons + scroll over the UIKit pointer path
+   (hover + `.indirectPointer` touches), the local cursor staying visible so you can aim. An
+   indirect pointer is never sent as a touch. Touch is gated on trust (not forwarded under
+   the TOFU prompt), and returning to the foreground restores the capture you had on leaving.
   `InputCapture` is cross-platform (GC works the same on iPadOS; ⌘⎋ is detected from
   the HID stream there); audio routes via `AVAudioSession` (the Settings device
   pickers are macOS-only). For the iPad-with-external-display setup: the target
   enables multiple scenes + indirect input events — on Stage Manager iPads, drag the
   punktfunk window onto the external screen and the stream runs there with full
   keyboard/mouse/touch. While streaming the session is immersive (edge-to-edge,
-   status bar + home indicator hidden) and the iPadOS cursor is hidden over the video
-   (`UIPointerInteraction` `.hidden()` — visible again when ⌘⎋ releases capture); on
+   status bar + home indicator hidden) and the iPadOS cursor is hidden over the video only
+   while the scene is actually pointer-LOCKED (`UIPointerInteraction` `.hidden()`); when the
+   lock isn't held it stays visible and the mouse forwards as an absolute cursor instead; on
   iOS first run the stream mode defaults to the device's native screen so the video
   fills the display. **tvOS** runs the same app (target **Punktfunk-tvOS**, first-lit
   in the Apple TV simulator at 720p60): playback-only audio (no mic on tvOS),
   focus-driven UI (`.card` host tiles), no kb/mouse capture yet — input lands with
-   gamepad support, the natural tvOS input anyway; core slices are tier-3 Rust targets
-   (see Build above). Known gaps: true pointer LOCK (`prefersPointerLocked`) isn't
+   gamepad support, the natural tvOS input anyway. While streaming there is NO focusable
+   control (a focusable Disconnect button would let the focus engine eat the controller's A
+   before the host sees it); the Siri Remote's **Menu** button disconnects (`.onExitCommand`).
+   Core slices are tier-3 Rust targets (see Build above). Known gaps: true pointer LOCK (`prefersPointerLocked`) isn't
   consulted through UIHostingController, so the hidden cursor can still drift onto a
   second screen (fixing it means putting the controller into the UIKit presentation
   chain); and
@@ -20,13 +20,16 @@ import SwiftUINavigationTransitions
 struct ContentView: View {
    @StateObject private var model = SessionModel()
    @StateObject private var store = HostStore()
+    @StateObject private var discovery = HostDiscovery()
    @AppStorage("punktfunk.width") private var width = 1920
    @AppStorage("punktfunk.height") private var height = 1080
    @AppStorage("punktfunk.hz") private var hz = 60
    @AppStorage("punktfunk.compositor") private var compositor = 0
    @AppStorage("punktfunk.gamepadType") private var gamepadType = 0
+    @AppStorage("punktfunk.bitrateKbps") private var bitrateKbps = 0
    @State private var showAddHost = false
    @State private var pairingTarget: StoredHost?
+    @State private var speedTestTarget: StoredHost?
    #if !os(macOS)
    @State private var showSettings = false
    #endif
@@ -71,6 +74,9 @@ struct ContentView: View {
                connect(pinned)
            }
        }
+        .sheet(item: $speedTestTarget) { host in
+            SpeedTestSheet(host: host)
+        }
        #endif
    }

@@ -104,6 +110,11 @@ struct ContentView: View {
        #else
        .background(Color.black)
        .ignoresSafeArea()
+        // Siri Remote MENU = disconnect (the idiomatic tvOS "back"). With no focusable
+        // disconnect control during play, the controller's buttons flow to the host instead of
+        // driving the focus engine. NOTE: a game controller's Menu is also forwarded to the
+        // host as Start — the Siri Remote is the intended disconnect path.
+        .onExitCommand { model.disconnect() }
        #endif
    }

@@ -112,16 +123,21 @@ struct ContentView: View {
    private var home: some View {
        NavigationStack {
            Group {
-                if store.hosts.isEmpty {
+                if store.hosts.isEmpty && discoveredUnsaved.isEmpty {
                    emptyState
                } else {
                    ScrollView {
-                        LazyVGrid(columns: gridColumns, spacing: gridSpacing) {
-                            ForEach(store.hosts) { host in
-                                hostCard(host)
+                        if !store.hosts.isEmpty {
+                            LazyVGrid(columns: gridColumns, spacing: gridSpacing) {
+                                ForEach(store.hosts) { host in
+                                    hostCard(host)
+                                }
                            }
+                            .padding()
+                        }
+                        if !discoveredUnsaved.isEmpty {
+                            discoveredSection
                        }
-                        .padding()
                        #if os(tvOS)
                        // Actions live below the hosts, not between them.
                        HStack(spacing: 32) {
@@ -142,6 +158,10 @@ struct ContentView: View {
                }
            }
            .navigationTitle("Punktfunkempfänger")
+            // Browse the LAN for advertised hosts only while the grid is up — not during a
+            // session. The home appears/disappears as the stream swaps in and out.
+            .onAppear { discovery.start() }
+            .onDisappear { discovery.stop() }
            #if os(tvOS)
            // Pushed routes — the Settings-app navigation feel (push animation, Menu
            // pops) instead of modal overlays.
@@ -160,6 +180,9 @@ struct ContentView: View {
                    connect(pinned)
                }
            }
+            .navigationDestination(item: $speedTestTarget) { host in
+                SpeedTestSheet(host: host)
+            }
            #endif
            #if !os(tvOS)
            .toolbar {
@@ -354,6 +377,10 @@ struct ContentView: View {
                guard !model.isBusy else { return }
                pairingTarget = host
            }
+            Button("Test Network Speed…") {
+                guard !model.isBusy else { return }
+                speedTestTarget = host
+            }
            if host.pinnedSHA256 != nil {
                Button("Forget Identity") { store.forgetIdentity(host) }
            }
@@ -394,7 +421,106 @@ struct ContentView: View {
                rawValue: UInt32(clamping: compositor)) ?? .auto,
            gamepad: GamepadManager.shared.resolveType(
                setting: PunktfunkConnection.GamepadType(
-                    rawValue: UInt32(clamping: gamepadType)) ?? .auto))
+                    rawValue: UInt32(clamping: gamepadType)) ?? .auto),
+            bitrateKbps: UInt32(clamping: bitrateKbps))
+    }
+
+    // MARK: - LAN discovery (mDNS)
+
+    /// Discovered hosts not already saved (matched by address+port) — the saved grid shows
+    /// the rest, so this section only surfaces genuinely-new hosts on the network.
+    private var discoveredUnsaved: [DiscoveredHost] {
+        discovery.hosts.filter { d in
+            !store.hosts.contains { $0.address == d.host && $0.port == d.port }
+        }
+    }
+
+    private var discoveredSection: some View {
+        VStack(alignment: .leading, spacing: 10) {
+            Label("On this network", systemImage: "antenna.radiowaves.left.and.right")
+                .font(.headline)
+                .foregroundStyle(.secondary)
+                .padding(.horizontal)
+            LazyVGrid(columns: gridColumns, spacing: gridSpacing) {
+                ForEach(discoveredUnsaved) { discoveredCard($0) }
+            }
+        }
+        .padding([.horizontal, .bottom])
+        .padding(.top, store.hosts.isEmpty ? 0 : 8)
+    }
+
+    private func discoveredCard(_ d: DiscoveredHost) -> some View {
+        #if os(iOS)
+        let iconSize: CGFloat = 56
+        let iconBox: CGFloat = 76
+        let cardPadding: CGFloat = 28
+        let nameFont = Font.title3.weight(.semibold)
+        #else
+        let iconSize: CGFloat = 42
+        let iconBox: CGFloat = 56
+        let cardPadding: CGFloat = 18
+        let nameFont = Font.headline
+        #endif
+        return Button {
+            connectDiscovered(d)
+        } label: {
+            VStack(spacing: 10) {
+                Image(systemName: "play.display")
+                    .font(.system(size: iconSize, weight: .light))
+                    .foregroundStyle(.tint)
+                    .frame(height: iconBox)
+                VStack(spacing: 2) {
+                    Text(d.name)
+                        .font(nameFont)
+                        .lineLimit(1)
+                    HStack(spacing: 4) {
+                        Image(systemName: d.requiresPairing ? "lock.fill" : "wifi")
+                            .font(.system(size: 9))
+                            .foregroundStyle(.secondary)
+                        Text("\(d.host):\(String(d.port))")
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                            .lineLimit(1)
+                    }
+                    Text(d.requiresPairing ? "Pairing required" : "Discovered")
+                        .font(.caption2)
+                        .foregroundStyle(.tertiary)
+                }
+            }
+            .frame(maxWidth: .infinity)
+            .padding(.vertical, cardPadding)
+            .padding(.horizontal, 12)
+            #if !os(tvOS)
+            // A dashed ring distinguishes a not-yet-saved discovered host from saved cards.
+            .background(.regularMaterial, in: RoundedRectangle(cornerRadius: 14))
+            .overlay {
+                RoundedRectangle(cornerRadius: 14)
+                    .strokeBorder(
+                        Color.secondary.opacity(0.25),
+                        style: StrokeStyle(lineWidth: 1, dash: [4, 3]))
+            }
+            #endif
+        }
+        #if os(tvOS)
+        .buttonStyle(.card)
+        #else
+        .buttonStyle(.plain)
+        #endif
+        .disabled(model.isBusy)
+    }
+
+    /// Tap a discovered host: save it (so the session has a stored identity and the trust pin
+    /// persists), then connect — TOFU shows the fingerprint, which should match the advertised
+    /// `fp`. A `pair=required` host goes straight to the pairing ceremony instead.
+    private func connectDiscovered(_ d: DiscoveredHost) {
+        guard !model.isBusy else { return }
+        let host = StoredHost(name: d.name, address: d.host, port: d.port)
+        store.add(host)
+        if d.requiresPairing {
+            pairingTarget = host
+        } else {
+            connect(host)
+        }
    }

    // MARK: - Trust on first use
@@ -526,11 +652,18 @@ struct ContentView: View {
                .font(.caption2)
                .foregroundStyle(.secondary)
            #endif
+            #if os(tvOS)
+            // No focusable control during play: a focusable button steals the controller's
+            // A press (the focus engine consumes it before the host sees it). Disconnect is
+            // the Siri Remote's Menu button (.onExitCommand on the stream) — just hint it.
+            Text("Press Menu to disconnect")
+                .font(.caption)
+                .foregroundStyle(.secondary)
+            #else
            Button("Disconnect (⌘D)") { model.disconnect() }
                .font(.caption)
-                #if !os(tvOS)
                .keyboardShortcut("d", modifiers: .command)
-                #endif
+            #endif
        }
        .padding(10)
        .background(.regularMaterial, in: RoundedRectangle(cornerRadius: 10))
@@ -572,12 +705,18 @@ struct ContentView: View {
           let g = PunktfunkConnection.GamepadType(name: name) {
            pad = g
        }
+        var bitrate = UInt32(clamping: bitrateKbps)
+        if let kbps = ProcessInfo.processInfo.environment["PUNKTFUNK_BITRATE_KBPS"],
+           let v = UInt32(kbps) {
+            bitrate = v
+        }
        model.connect(
            to: host,
            width: UInt32(clamping: width), height: UInt32(clamping: height),
            hz: UInt32(clamping: hz),
            compositor: pref,
            gamepad: pad,
+            bitrateKbps: bitrate,
            autoTrust: true)
    }
 }
@@ -0,0 +1,183 @@
+// LAN auto-discovery of punktfunk/1 hosts over mDNS — the client side of the host's
+// `crate::discovery` advert (`_punktfunk._udp`). Browses with NWBrowser (TXT rides in the
+// result metadata), resolves each service to a connectable IP:port with a throwaway
+// NWConnection, and publishes the live set.
+//
+// The advertised `fp` (host cert SHA-256) is ADVISORY: mDNS is unauthenticated, so TOFU /
+// pinning still verifies the host on connect — it's surfaced only so a picker can show it and
+// pre-fill. `pair=required` lets the UI route straight to the pairing ceremony.
+//
+// iOS/tvOS gate Bonjour browsing on Info.plist `NSBonjourServices` listing `_punktfunk._udp`
+// (Config/Info.plist) — without it the system blocks the browse and nothing is returned.
+
+#if canImport(Network)
+import Foundation
+import Network
+
+/// A punktfunk/1 host found on the LAN. `fingerprintHex` is advisory (see file header).
+public struct DiscoveredHost: Identifiable, Sendable, Equatable {
+    /// Stable host id (mDNS `id` TXT); falls back to the Bonjour instance name.
+    public let id: String
+    /// Bonjour instance name (the host's chosen label).
+    public let name: String
+    /// Resolved address to hand to `PunktfunkConnection`.
+    public let host: String
+    public let port: UInt16
+    /// Host cert SHA-256 (lowercase hex) the host advertised, or nil if absent.
+    public let fingerprintHex: String?
+    /// The host advertised `pair=required` — a client must pair before it can stream.
+    public let requiresPairing: Bool
+}
+
+@MainActor
+public final class HostDiscovery: ObservableObject {
+    /// Currently-visible hosts, deduped by `id`, sorted by name. Main-actor.
+    @Published public private(set) var hosts: [DiscoveredHost] = []
+
+    private var browser: NWBrowser?
+    /// Keyed by the service endpoint's description (a stable, Sendable handle we can capture
+    /// into the resolve callbacks without smuggling non-Sendable Network types across hops).
+    private var resolved: [String: DiscoveredHost] = [:]
+    private var connections: [String: NWConnection] = [:]
+
+    public init() {}
+
+    /// Start browsing `_punktfunk._udp`. Idempotent — a second call while live is a no-op.
+    public func start() {
+        guard browser == nil else { return }
+        let browser = NWBrowser(
+            for: .bonjourWithTXTRecord(type: "_punktfunk._udp", domain: nil),
+            using: NWParameters())
+        browser.browseResultsChangedHandler = { results, _ in
+            MainActor.assumeIsolated { [weak self] in self?.reconcile(results) }
+        }
+        browser.stateUpdateHandler = { state in
+            // A failed browser never recovers on its own; tear down and re-arm so transient
+            // network changes (Wi-Fi flip, VPN) don't leave discovery silently dead.
+            MainActor.assumeIsolated { [weak self] in
+                if case .failed = state { self?.restart() }
+            }
+        }
+        self.browser = browser
+        browser.start(queue: .main)
+    }
+
+    /// Stop browsing and drop all discovered state.
+    public func stop() {
+        browser?.cancel()
+        browser = nil
+        for conn in connections.values { conn.cancel() }
+        connections.removeAll()
+        resolved.removeAll()
+        if !hosts.isEmpty { hosts = [] }
+    }
+
+    deinit {
+        browser?.cancel()
+        for conn in connections.values { conn.cancel() }
+    }
+
+    private func restart() {
+        stop()
+        start()
+    }
+
+    /// Diff the browser's current result set against what we're tracking: drop departed
+    /// services, resolve newly-seen ones.
+    private func reconcile(_ results: Set<NWBrowser.Result>) {
+        let live = Set(results.map { Self.key($0) })
+        for key in resolved.keys where !live.contains(key) { resolved[key] = nil }
+        for key in connections.keys where !live.contains(key) {
+            connections[key]?.cancel()
+            connections[key] = nil
+        }
+        for result in results {
+            let key = Self.key(result)
+            if resolved[key] == nil, connections[key] == nil { resolve(result) }
+        }
+        publish()
+    }
+
+    /// Resolve one service to IP:port via a short UDP connection (it reaches `.ready` once the
+    /// path is established — no data is sent), reading the TXT up front so the callback only
+    /// captures Sendable values + the endpoint key.
+    private func resolve(_ result: NWBrowser.Result) {
+        let key = Self.key(result)
+        let name = Self.instanceName(result.endpoint)
+        var fp: String?
+        var pair: String?
+        var id: String?
+        if case let .bonjour(txt) = result.metadata {
+            fp = Self.entry(txt, "fp")
+            pair = Self.entry(txt, "pair")
+            id = Self.entry(txt, "id")
+        }
+        let conn = NWConnection(to: result.endpoint, using: .udp)
+        connections[key] = conn
+        conn.stateUpdateHandler = { state in
+            MainActor.assumeIsolated { [weak self] in
+                guard let self, let conn = self.connections[key] else { return }
+                switch state {
+                case .ready:
+                    if case let .hostPort(host, port)? = conn.currentPath?.remoteEndpoint,
+                       let address = Self.hostString(host) {
+                        self.resolved[key] = DiscoveredHost(
+                            id: (id?.isEmpty == false) ? id! : name,
+                            name: name, host: address, port: port.rawValue,
+                            fingerprintHex: fp, requiresPairing: pair == "required")
+                        self.publish()
+                    }
+                    conn.cancel()
+                    self.connections[key] = nil
+                case .failed, .cancelled:
+                    self.connections[key] = nil
+                default:
+                    break
+                }
+            }
+        }
+        conn.start(queue: .main)
+    }
+
+    /// Publish the resolved set, deduped by `id` (a host on several interfaces / re-advertising
+    /// collapses to one row), sorted by name.
+    private func publish() {
+        var byID: [String: DiscoveredHost] = [:]
+        for host in resolved.values { byID[host.id] = host }
+        let next = byID.values.sorted {
+            $0.name.localizedCaseInsensitiveCompare($1.name) == .orderedAscending
+        }
+        if next != hosts { hosts = next }
+    }
+
+    private static func key(_ result: NWBrowser.Result) -> String {
+        "\(result.endpoint)"
+    }
+
+    private static func instanceName(_ endpoint: NWEndpoint) -> String {
+        if case let .service(name, _, _, _) = endpoint { return name }
+        return "punktfunk host"
+    }
+
+    private static func entry(_ txt: NWTXTRecord, _ field: String) -> String? {
+        if case let .string(value) = txt.getEntry(for: field), !value.isEmpty { return value }
+        return nil
+    }
+
+    /// A resolved `NWEndpoint.Host` → a plain address string for `PunktfunkConnection` (the
+    /// scope id on a link-local address is stripped — the host+port pair is resolved again on
+    /// the Rust side, which can't parse the `%iface` suffix).
+    private static func hostString(_ host: NWEndpoint.Host) -> String? {
+        switch host {
+        case .ipv4(let address):
+            return "\(address)".split(separator: "%").first.map(String.init)
+        case .ipv6(let address):
+            return "\(address)".split(separator: "%").first.map(String.init)
+        case .name(let name, _):
+            return name
+        @unknown default:
+            return nil
+        }
+    }
+}
+#endif
@@ -98,6 +98,15 @@ public final class InputCapture {
    /// window, clicking the HUD) and nothing is forwarded. Main-queue only.
    public private(set) var forwarding = false

+    /// iPad pointer routing (the StreamViewController mirrors the scene's live pointer-lock
+    /// state into this). GCMouse only delivers relative deltas + buttons while the scene is
+    /// LOCKED, so this is true then and the GCMouse handlers forward. When the scene can't
+    /// lock (Stage Manager, not frontmost, iPhone) the iPad routes the mouse through UIKit's
+    /// pointer path as ABSOLUTE moves (`sendMouseAbs`) instead — so this goes false, gating
+    /// GCMouse off and enabling the absolute path, the two never double-sending. Moot on
+    /// macOS (no GCMouse handlers installed; `sendMouseAbs` is never called there). Main-queue.
+    public var gcMouseForwarding = false
+
    /// Fired on ⌘⎋ (the capture toggle — detected here so it works in both states; the
    /// event itself is swallowed). Main queue.
    public var onToggleCapture: (() -> Void)?
@@ -257,6 +266,17 @@ public final class InputCapture {
        #endif
    }

+    /// Release any held MOUSE buttons host-side, leaving keyboard state untouched. Used when
+    /// the iPad pointer lock drops while a GCMouse button is held: by then the GCMouse release
+    /// handler is gated off (`gcMouseForwarding` is false), so it can't deliver the release
+    /// itself and the button would otherwise stick until the next `releaseAll` (blur / stop).
+    public func releaseMouseButtons() {
+        for button in pressedButtons {
+            connection.send(.mouseButton(button, down: false))
+        }
+        pressedButtons.removeAll()
+    }
+
    private func sendButton(_ button: UInt32, pressed: Bool) {
        guard forwarding else { return }
        if button == suppressedButton {
@@ -365,7 +385,7 @@ public final class InputCapture {
        // pointer lock). See the file header.
        #if !os(macOS)
        input.mouseMovedHandler = { [weak self] _, dx, dy in
-            guard let self, self.forwarding else { return }
+            guard let self, self.forwarding, self.gcMouseForwarding else { return }
            // GC gives +y up; the host expects screen-space (+y down).
            let fx = dx + self.residualX
            let fy = -dy + self.residualY
@@ -387,28 +407,40 @@ public final class InputCapture {
                }
            }
        }
+        // Buttons take the GCMouse path only while the scene is pointer-locked; when it
+        // isn't, the UIKit indirect-pointer path carries them (gcMouseForwarding gates here
+        // so the two can't double-send).
        input.leftButton.pressedChangedHandler = { [weak self] _, _, pressed in
-            self?.sendButton(1, pressed: pressed)
+            guard let self, self.gcMouseForwarding else { return }
+            self.sendButton(1, pressed: pressed)
        }
        input.rightButton?.pressedChangedHandler = { [weak self] _, _, pressed in
-            self?.sendButton(3, pressed: pressed)
+            guard let self, self.gcMouseForwarding else { return }
+            self.sendButton(3, pressed: pressed)
        }
        input.middleButton?.pressedChangedHandler = { [weak self] _, _, pressed in
-            self?.sendButton(2, pressed: pressed)
+            guard let self, self.gcMouseForwarding else { return }
+            self.sendButton(2, pressed: pressed)
        }
        // First two side buttons → GameStream X1/X2.
        if let aux = input.auxiliaryButtons {
            for (i, button) in aux.prefix(2).enumerated() {
                button.pressedChangedHandler = { [weak self] _, _, pressed in
-                    self?.sendButton(UInt32(4 + i), pressed: pressed)
+                    guard let self, self.gcMouseForwarding else { return }
+                    self.sendButton(UInt32(4 + i), pressed: pressed)
                }
            }
        }
+        // Scroll WHEEL (plain HID mice) while pointer-locked: GCMouse's scroll dpad reports
+        // wheel deltas here, +y up / +x right — already the host's WHEEL convention, one unit
+        // per notch → ×120 (WHEEL_DELTA), residual-accumulated by sendScroll. (Trackpad
+        // two-finger scrolling is gesture-based and does NOT reach GameController — that
+        // arrives via the stream view's scroll pan recognizer; on macOS, via scrollWheel.)
+        input.scroll.valueChangedHandler = { [weak self] _, dx, dy in
+            guard let self, self.forwarding, self.gcMouseForwarding else { return }
+            self.sendScroll(dx: dx * 120, dy: dy * 120)
+        }
        #endif
-        // NOTE: no scroll handler here. GCMouse's scroll dpad only fires for plain HID
-        // wheel deltas — trackpad/Magic Mouse scrolling is gesture-based and never
-        // reaches GameController. Scroll arrives via the stream view's scrollWheel
-        // override (NSEvent covers wheels too) → sendScroll().
    }

    /// Forward relative mouse motion (macOS). Fed by StreamLayerView's NSEvent monitor —
@@ -440,6 +472,18 @@ public final class InputCapture {
        }
    }

+    /// Forward an ABSOLUTE cursor position (iPad pointer fallback). Fed by the iOS stream
+    /// view's hover / indirect-pointer path when the scene can't pointer-lock: the host
+    /// places its cursor at this client-surface pixel — the same letterbox mapping the touch
+    /// path uses. Gated by `forwarding` AND `!gcMouseForwarding` (the relative GCMouse path
+    /// owns motion while locked), so absolute and relative motion never both fire. No residual
+    /// accumulation — the value is absolute, not a delta.
+    public func sendMouseAbs(x: Int32, y: Int32, surfaceWidth: UInt32, surfaceHeight: UInt32) {
+        guard forwarding, !gcMouseForwarding else { return }
+        connection.send(.mouseMoveAbs(
+            x: x, y: y, surfaceWidth: surfaceWidth, surfaceHeight: surfaceHeight))
+    }
+
    /// Forward a scroll gesture, WHEEL_DELTA(120)-scaled (positive = up / right,
    /// Moonlight's convention). Fed by StreamLayerView.scrollWheel — the only delivery
    /// path that covers trackpad/Magic Mouse gestures (GCMouse never reports them).
@@ -38,16 +38,21 @@ private let streamInputDebug =
 private final class CursorCapture {
    private var captured = false

-    func capture(in view: NSView) {
-        guard !captured, let window = view.window, view.bounds.width > 0 else { return }
+    /// Returns whether capture actually engaged. It can fail mid app-activation — the click
+    /// that reactivates the app delivers `mouseDown` before the app is frontmost, and
+    /// `CGAssociateMouseAndMouseCursorPosition` is refused then — so the caller must stay
+    /// released and let the NEXT click retry, never latching a half-captured state.
+    func capture(in view: NSView) -> Bool {
+        guard !captured, let window = view.window, view.bounds.width > 0 else { return false }
        // Park the cursor mid-view so a click can't land in (and activate) another app.
        let rectOnScreen = window.convertToScreen(view.convert(view.bounds, to: nil))
        let primaryHeight = NSScreen.screens.first?.frame.height ?? 0
        CGWarpMouseCursorPosition(
            CGPoint(x: rectOnScreen.midX, y: primaryHeight - rectOnScreen.midY))
-        CGAssociateMouseAndMouseCursorPosition(0)
+        guard CGAssociateMouseAndMouseCursorPosition(0) == .success else { return false }
        NSCursor.hide()
        captured = true
+        return true
    }

    func release() {
@@ -194,6 +199,10 @@ public final class StreamLayerView: NSView {
    /// InputCapture suppresses its press/release toward the host. Clicks while captured
    /// are the host's (GC forwards them) — nothing to do here.
    public override func mouseDown(with event: NSEvent) {
+        if streamInputDebug {
+            streamInputLog.debug(
+                "mouseDown: captureEnabled=\(self.captureEnabled, privacy: .public) captured=\(self.captured, privacy: .public)")
+        }
        if captureEnabled, !captured {
            engageCapture(fromClick: true)
            return
@@ -239,6 +248,11 @@ public final class StreamLayerView: NSView {
    // here as a send; ⌘-combos still arrive via performKeyEquivalent and stay functional (⌘D).
    // Modifier keys never fire keyDown/keyUp — they come through flagsChanged below.
    public override var acceptsFirstResponder: Bool { true }
+    // A click after the app was inactive (Cmd-Tab away and back) must reach mouseDown so the
+    // user can re-capture — the deliberate design is that becoming active does NOT auto-grab;
+    // you click into the video. Default NSViews aren't key-view candidates, which can drop
+    // that first click; opting in keeps the view a valid click/responder target.
+    public override var canBecomeKeyView: Bool { true }
    public override func keyDown(with event: NSEvent) {
        if captured {
            if let ic = inputCapture, let vk = InputCapture.keyCodeToVK[event.keyCode] {
@@ -285,7 +299,10 @@ public final class StreamLayerView: NSView {
        guard captureEnabled, !captured, pump != nil, window != nil,
              fromClick || (NSApp.isActive && window?.isKeyWindow == true)
        else { return }
-        cursorCapture.capture(in: self)
+        // If the cursor grab is refused (e.g. the reactivating click arrives before the app is
+        // frontmost), stay released so the NEXT click retries — never latch captured=true over
+        // a free cursor, which would make mouseDown's `!captured` guard reject every later click.
+        guard cursorCapture.capture(in: self) else { return }
        inputCapture?.setForwarding(true, suppressClick: fromClick)
        // Install AFTER the warp + setForwarding: the engage warp generates no forwarded
        // delta (the monitor isn't up yet), and the engage click's suppression latch is
@@ -5,12 +5,21 @@
 // fullscreen-and-frontmost, so in Stage Manager it degrades to Mac-style "both cursors
 // visible" forwarding).
 //
-// Touch is the primary input and is always forwarded (touching the video IS explicit
-// intent): every finger maps to a wire touch id, coordinates are mapped through the
-// aspect-fit letterbox into host-mode pixels, so surface == host mode and the host's
-// rescale is the identity. Hardware keyboard/mouse forwarding shares InputCapture with
-// macOS — auto-engaged when streaming starts, ⌘⎋ toggles (detected from the HID stream;
-// there is no NSEvent monitor here).
+// FINGER touch and INDIRECT POINTER (mouse/trackpad) are routed apart by UITouch.type.
+// Direct fingers (and Pencil) always forward as wire touches — every finger maps to a touch
+// id, coordinates mapped through the aspect-fit letterbox into host-mode pixels (surface ==
+// host mode, so the host's rescale is the identity).
+//
+// A hardware mouse/trackpad is a pointer, not a finger. When the scene is pointer-LOCKED
+// (full-screen + frontmost iPad) GCMouse delivers raw relative deltas and the system hides
+// the cursor — the gaming-grade path. When it CAN'T lock (Stage Manager, not frontmost,
+// iPhone) the system shows its own cursor and routes the mouse through UIKit's pointer path:
+// hover + indirect-pointer touches, which we forward as ABSOLUTE cursor position (+ buttons)
+// so the host cursor tracks the visible local one. We never forward an indirect pointer as a
+// touch — doing so hid the cursor and made the host see taps instead of a moving mouse.
+// GCMouse is gated off whenever the lock isn't held so the two paths can't double-send.
+// Hardware keyboard forwarding shares InputCapture with macOS — auto-engaged when streaming
+// starts, ⌘⎋ toggles (detected from the HID stream; there is no NSEvent monitor here).
 //
 // The public type is named StreamView like its macOS twin (each is platform-gated), so
 // the SwiftUI app layer is identical on both platforms.
@@ -82,6 +91,9 @@ public final class StreamViewController: UIViewController {
    private var inputCapture: InputCapture?
    fileprivate var captured = false
    private var pointerInteraction: UIPointerInteraction?
+    /// Capture state at the last resign, restored on the next foreground — otherwise the
+    /// mouse/keyboard stay released after navigating out and nothing re-grabs them.
+    private var wasCapturedOnResign = false
    #endif

    /// Reads whether the scene's pointer is actually locked right now; nil = state
@@ -156,9 +168,29 @@ public final class StreamViewController: UIViewController {
            let mode = connection.currentMode()
            return CGSize(width: Double(mode.width), height: Double(mode.height))
        }
-        streamView.onTouchEvent = { [weak connection] event in
+        streamView.onTouchEvent = { [weak self, weak connection] event in
+            // Touch IS the intent during a trusted session, but must not leak to the host
+            // while a trust prompt is up (captureEnabled == false) — gate it on that. The
+            // ⌘⎋ mouse/keyboard toggle (captured) deliberately does NOT gate touch.
+            guard self?.captureEnabled == true else { return }
            connection?.send(event)
        }
+        // Indirect pointer (mouse/trackpad with no lock) → absolute cursor + buttons, routed
+        // through InputCapture so the forwarding gate and release-on-blur apply uniformly.
+        streamView.onPointerMoveAbs = { [weak self] p in
+            self?.inputCapture?.sendMouseAbs(
+                x: p.x, y: p.y, surfaceWidth: p.w, surfaceHeight: p.h)
+        }
+        streamView.onPointerButton = { [weak self] button, down in
+            self?.inputCapture?.sendMouseButton(button, pressed: down)
+        }
+        // Trackpad two-finger / wheel scroll → host scroll. The pan recognizer is the
+        // UNLOCKED regime; while locked, GCMouse's scroll handler owns it — mirror the
+        // sendMouseAbs !gcMouseForwarding gate so the two can't double-send.
+        streamView.onScroll = { [weak self] dx, dy in
+            guard let self, self.inputCapture?.gcMouseForwarding == false else { return }
+            self.inputCapture?.sendScroll(dx: dx, dy: dy)
+        }

        let capture = InputCapture(connection: connection)
        capture.onToggleCapture = { [weak self] in
@@ -185,17 +217,28 @@ public final class StreamViewController: UIViewController {
        observers.append(NotificationCenter.default.addObserver(
            forName: UIApplication.willResignActiveNotification, object: nil, queue: .main
        ) { [weak self] _ in
-            self?.setCaptured(false)
+            guard let self else { return }
+            self.wasCapturedOnResign = self.captured
+            self.setCaptured(false)
        })
-        // The system can drop the lock without us asking (Slide Over, Stage Manager, leaving
-        // foregroundActive). Surface it so the user sees, in PUNKTFUNK_INPUT_DEBUG, when
-        // GCMouse delivery has silently stopped and we've fallen back to touch.
+        // Returning to the foreground restores the capture the user had before leaving —
+        // without this the mouse/keyboard stay released and nothing re-grabs them (touch
+        // always plays regardless). The macOS twin re-engages on a click into the video.
+        observers.append(NotificationCenter.default.addObserver(
+            forName: UIApplication.didBecomeActiveNotification, object: nil, queue: .main
+        ) { [weak self] _ in
+            guard let self, self.wasCapturedOnResign, self.captureEnabled, self.pump != nil
+            else { return }
+            self.setCaptured(true)
+        })
+        // The system can grant or drop the lock without us asking (Slide Over, Stage Manager,
+        // entering/leaving foregroundActive). Re-resolve the mouse routing on every change:
+        // GCMouse (locked) vs the absolute UIKit pointer path (unlocked), and the
+        // hidden-vs-visible local cursor.
        observers.append(NotificationCenter.default.addObserver(
            forName: UIPointerLockState.didChangeNotification, object: nil, queue: .main
        ) { [weak self] _ in
-            guard let self, iosInputDebug else { return }
-            let locked = self.pointerLockEngaged().map(String.init(describing:)) ?? "unavailable"
-            iosInputLog.debug("pointer lock changed: isLocked=\(locked, privacy: .public)")
+            self?.syncPointerLock()
        })

        if captureEnabled {
@@ -212,6 +255,9 @@ public final class StreamViewController: UIViewController {
        inputCapture?.stop()
        inputCapture = nil
        streamView.onTouchEvent = nil
+        streamView.onPointerMoveAbs = nil
+        streamView.onPointerButton = nil
+        streamView.onScroll = nil
        streamView.currentHostMode = nil
        #endif
        pump?.stop()
@@ -231,18 +277,35 @@ public final class StreamViewController: UIViewController {
            captured = false
        }
        setNeedsUpdateOfPrefersPointerLocked()
-        pointerInteraction?.invalidate() // re-resolve the hidden/visible pointer style
+        syncPointerLock() // resolve cursor + GCMouse/absolute routing for the current state
        let onCaptureChange = onCaptureChange
        let captured = captured
        DispatchQueue.main.async { [weak self] in
            onCaptureChange?(captured)
-            // The lock request is async — read the resolved state next turn. If it didn't
-            // engage, GCMouse won't deliver and the always-on touch path carries input.
-            if iosInputDebug, let self {
-                let locked = self.pointerLockEngaged().map(String.init(describing:)) ?? "unavailable"
-                iosInputLog.debug(
-                    "setCaptured(\(captured, privacy: .public)) → pointer lock isLocked=\(locked, privacy: .public)")
-            }
+            // The lock request is async — the resolved state can land a runloop later, and the
+            // initial grant may precede our didChange observer, so re-resolve the routing here.
+            self?.syncPointerLock()
+        }
+    }
+
+    /// Resolve the mouse routing for the scene's CURRENT pointer-lock state: GCMouse (relative
+    /// deltas + buttons) while locked, the absolute UIKit pointer path while not, and the
+    /// hidden-vs-visible local cursor to match. Idempotent — safe to call on every lock-state
+    /// change and capture toggle. Main queue.
+    private func syncPointerLock() {
+        let locked = pointerLockEngaged() == true
+        let useGCMouse = captured && locked
+        // Lock dropped (or capture ended) while the GCMouse path held a button down: once
+        // gcMouseForwarding flips false its release handler is gated off, so flush any held
+        // mouse button here before the switch — otherwise it sticks down on the host.
+        if inputCapture?.gcMouseForwarding == true, !useGCMouse {
+            inputCapture?.releaseMouseButtons()
+        }
+        inputCapture?.gcMouseForwarding = useGCMouse
+        pointerInteraction?.invalidate() // re-resolve the hidden/visible cursor for the state
+        if iosInputDebug {
+            iosInputLog.debug(
+                "pointer lock isLocked=\(locked, privacy: .public) captured=\(self.captured, privacy: .public)")
        }
    }
    #endif
@@ -258,7 +321,11 @@ extension StreamViewController: UIPointerInteractionDelegate {
    public func pointerInteraction(
        _ interaction: UIPointerInteraction, styleFor region: UIPointerRegion
    ) -> UIPointerStyle? {
-        captured ? .hidden() : nil
+        // Hide the local cursor only when the scene is actually pointer-LOCKED — then the
+        // host renders its own cursor from GCMouse deltas and a visible local one would just
+        // diverge. When the lock isn't held the cursor stays VISIBLE so the user can aim; the
+        // pointer is forwarded as an absolute position, both cursors tracking together.
+        captured && pointerLockEngaged() == true ? .hidden() : nil
    }
 }
 #endif
@@ -274,12 +341,26 @@ final class StreamLayerUIView: UIView {
    }

    #if os(iOS)
-    /// Reads the LIVE negotiated mode in pixels (the touch coordinate space).
-    var currentHostMode: (() -> CGSize)?
-    var onTouchEvent: ((PunktfunkInputEvent) -> Void)?
+    /// A position already mapped into host-mode pixels, with the surface dims the host
+    /// rescales against (== host mode, so its rescale is the identity).
+    struct HostPoint { let x: Int32; let y: Int32; let w: UInt32; let h: UInt32 }

-    /// Wire touch ids per active UITouch; ids are reused after the touch ends.
+    /// Reads the LIVE negotiated mode in pixels (the touch/pointer coordinate space).
+    var currentHostMode: (() -> CGSize)?
+    /// Direct fingers / Pencil → wire touch events.
+    var onTouchEvent: ((PunktfunkInputEvent) -> Void)?
+    /// Indirect pointer (mouse/trackpad with no lock) → absolute cursor moves.
+    var onPointerMoveAbs: ((HostPoint) -> Void)?
+    /// Indirect-pointer buttons (GameStream ids: 1=left 3=right); `down` = press.
+    var onPointerButton: ((_ button: UInt32, _ down: Bool) -> Void)?
+    /// Trackpad two-finger / wheel scroll (no lock) → host scroll deltas, WHEEL(120)-scaled.
+    var onScroll: ((_ dx: Float, _ dy: Float) -> Void)?
+
+    /// Wire touch ids per active direct UITouch; ids are reused after the touch ends.
    private var touchIDs: [ObjectIdentifier: UInt32] = [:]
+    /// GameStream button held per active indirect-pointer touch (one click/drag session);
+    /// released when that touch ends.
+    private var pointerButtons: [ObjectIdentifier: UInt32] = [:]
    #endif

    override init(frame: CGRect) {
@@ -287,6 +368,17 @@ final class StreamLayerUIView: UIView {
        displayLayer.videoGravity = .resizeAspect
        #if os(iOS)
        isMultipleTouchEnabled = true
+        // Button-less mouse/trackpad movement (no lock) arrives as hover, not touches —
+        // forward it as absolute cursor moves so the host cursor tracks without a click held.
+        addGestureRecognizer(
+            UIHoverGestureRecognizer(target: self, action: #selector(handleHover)))
+        // Trackpad two-finger / wheel scroll → a scroll-ONLY pan: allowedTouchTypes = []
+        // rejects finger drags (those stay host touches), allowedScrollTypesMask accepts the
+        // indirect scroll devices. Forwarded as host scroll deltas.
+        let scrollPan = UIPanGestureRecognizer(target: self, action: #selector(handleScroll))
+        scrollPan.allowedScrollTypesMask = .all
+        scrollPan.allowedTouchTypes = []
+        addGestureRecognizer(scrollPan)
        #endif
        backgroundColor = .black
    }
@@ -296,26 +388,58 @@ final class StreamLayerUIView: UIView {

    #if os(iOS)
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
-        forward(touches, kind: .down)
+        route(touches, event: event, kind: .down)
    }
    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
-        forward(touches, kind: .move)
+        route(touches, event: event, kind: .move)
    }
    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
-        forward(touches, kind: .up)
+        route(touches, event: event, kind: .up)
    }
    override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
-        forward(touches, kind: .up)
+        route(touches, event: event, kind: .up)
    }

    private enum TouchKind { case down, move, up }

-    private func forward(_ touches: Set<UITouch>, kind: TouchKind) {
-        guard let hostMode = currentHostMode?(),
-              hostMode.width > 0, hostMode.height > 0, onTouchEvent != nil
-        else { return }
-        let video = AVMakeRect(aspectRatio: hostMode, insideRect: bounds)
-        guard video.width > 0, video.height > 0 else { return }
+    /// Split a touch batch by kind: an INDIRECT POINTER (mouse/trackpad with no lock) drives
+    /// the host cursor as an absolute mouse; everything else (direct finger, Pencil) is a host
+    /// touch. Mixed batches are possible, so partition rather than branch on the first touch.
+    private func route(_ touches: Set<UITouch>, event: UIEvent?, kind: TouchKind) {
+        var fingers: Set<UITouch> = []
+        for touch in touches {
+            if touch.type == .indirectPointer {
+                handleIndirectPointer(touch, event: event, kind: kind)
+            } else {
+                fingers.insert(touch)
+            }
+        }
+        if !fingers.isEmpty { forwardTouches(fingers, kind: kind) }
+    }
+
+    /// An indirect-pointer touch is a button-held click/drag session: forward its position as
+    /// an absolute cursor move and its button as a mouse button (down on begin, up on end).
+    private func handleIndirectPointer(_ touch: UITouch, event: UIEvent?, kind: TouchKind) {
+        let key = ObjectIdentifier(touch)
+        let host = hostPoint(from: touch.location(in: self))
+        switch kind {
+        case .down:
+            let button = Self.gsButton(for: event?.buttonMask ?? .primary)
+            pointerButtons[key] = button
+            if let host { onPointerMoveAbs?(host) } // place the cursor, then press
+            onPointerButton?(button, true)
+        case .move:
+            if let host { onPointerMoveAbs?(host) }
+        case .up:
+            if let host { onPointerMoveAbs?(host) }
+            if let button = pointerButtons.removeValue(forKey: key) {
+                onPointerButton?(button, false)
+            }
+        }
+    }
+
+    private func forwardTouches(_ touches: Set<UITouch>, kind: TouchKind) {
+        guard onTouchEvent != nil else { return }
        for touch in touches {
            let key = ObjectIdentifier(touch)
            let id: UInt32
@@ -332,20 +456,53 @@ final class StreamLayerUIView: UIView {
                onTouchEvent?(.touchUp(id: id))
                continue
            }
-            let p = touch.location(in: self)
-            let x = Int32(((p.x - video.minX) / video.width * hostMode.width)
-                .rounded().clamped(to: 0...(hostMode.width - 1)))
-            let y = Int32(((p.y - video.minY) / video.height * hostMode.height)
-                .rounded().clamped(to: 0...(hostMode.height - 1)))
-            let w = UInt32(hostMode.width)
-            let h = UInt32(hostMode.height)
+            guard let h = hostPoint(from: touch.location(in: self)) else { continue }
            onTouchEvent?(
                kind == .down
-                    ? .touchDown(id: id, x: x, y: y, surfaceWidth: w, surfaceHeight: h)
-                    : .touchMove(id: id, x: x, y: y, surfaceWidth: w, surfaceHeight: h))
+                    ? .touchDown(id: id, x: h.x, y: h.y, surfaceWidth: h.w, surfaceHeight: h.h)
+                    : .touchMove(id: id, x: h.x, y: h.y, surfaceWidth: h.w, surfaceHeight: h.h))
        }
    }

+    /// Button-less mouse/trackpad movement (no lock) → absolute cursor move.
+    @objc private func handleHover(_ recognizer: UIHoverGestureRecognizer) {
+        switch recognizer.state {
+        case .began, .changed:
+            if let h = hostPoint(from: recognizer.location(in: self)) { onPointerMoveAbs?(h) }
+        default:
+            break
+        }
+    }
+
+    /// Trackpad / wheel scroll (no lock) → host scroll deltas. The translation is consumed
+    /// each callback so the next is a fresh delta. Sign/scale are tunable (≈ one notch per
+    /// ~10 pt): finger up scrolls up (host +y), x passes through — the host WHEEL convention.
+    @objc private func handleScroll(_ g: UIPanGestureRecognizer) {
+        guard g.state == .began || g.state == .changed else { return }
+        let t = g.translation(in: self)
+        g.setTranslation(.zero, in: self)
+        onScroll?(Float(t.x) * 12, Float(-t.y) * 12)
+    }
+
+    /// Map a view-space point through the aspect-fit letterbox into host-mode pixels; points
+    /// outside the video area clamp onto its edge. nil until a mode is negotiated.
+    private func hostPoint(from p: CGPoint) -> HostPoint? {
+        guard let hostMode = currentHostMode?(), hostMode.width > 0, hostMode.height > 0
+        else { return nil }
+        let video = AVMakeRect(aspectRatio: hostMode, insideRect: bounds)
+        guard video.width > 0, video.height > 0 else { return nil }
+        let x = Int32(((p.x - video.minX) / video.width * hostMode.width)
+            .rounded().clamped(to: 0...(hostMode.width - 1)))
+        let y = Int32(((p.y - video.minY) / video.height * hostMode.height)
+            .rounded().clamped(to: 0...(hostMode.height - 1)))
+        return HostPoint(x: x, y: y, w: UInt32(hostMode.width), h: UInt32(hostMode.height))
+    }
+
+    /// `.secondary` (right button / two-finger click) → GameStream right (3); else left (1).
+    private static func gsButton(for mask: UIEvent.ButtonMask) -> UInt32 {
+        mask.contains(.secondary) ? 3 : 1
+    }
+
    private func nextFreeID() -> UInt32 {
        var id: UInt32 = 0
        while touchIDs.values.contains(id) { id += 1 }
@@ -0,0 +1,54 @@
+// Advertise a fake punktfunk/1 host over real mDNS (NWListener) and assert HostDiscovery's
+// NWBrowser finds it, resolves an address+port, and parses the TXT (id / pair / fp). This
+// exercises the whole client discovery path on the loopback/LAN; it self-skips if the test
+// environment blocks Bonjour (sandboxed CI without local-network access).
+
+import Network
+import PunktfunkKit
+import XCTest
+
+final class HostDiscoveryTests: XCTestCase {
+    func testFindsAdvertisedHost() async throws {
+        let serviceName = "PunktfunkTest-\(UUID().uuidString.prefix(8))"
+        let uniqueid = "test-\(UUID().uuidString)"
+
+        var txt = NWTXTRecord()
+        txt["proto"] = "punktfunk/1"
+        txt["fp"] = String(repeating: "ab", count: 32) // 64 hex chars, like a real cert SHA-256
+        txt["pair"] = "required"
+        txt["id"] = uniqueid
+
+        let listener = try NWListener(using: .udp)
+        listener.service = NWListener.Service(
+            name: String(serviceName), type: "_punktfunk._udp", txtRecord: txt)
+        // The resolver opens a throwaway UDP flow to read the resolved endpoint — accept and
+        // drop it so it doesn't linger.
+        listener.newConnectionHandler = { connection in connection.cancel() }
+        listener.start(queue: .global())
+        defer { listener.cancel() }
+
+        let discovery = await HostDiscovery()
+        await discovery.start()
+        defer { Task { await discovery.stop() } }
+
+        // Poll up to ~10s for the advert to be browsed AND resolved.
+        var found: DiscoveredHost?
+        let deadline = Date().addingTimeInterval(10)
+        while Date() < deadline {
+            if let host = await discovery.hosts.first(where: { $0.name == String(serviceName) }) {
+                found = host
+                break
+            }
+            try await Task.sleep(nanoseconds: 200_000_000)
+        }
+
+        guard let host = found else {
+            throw XCTSkip("mDNS discovery unavailable in this environment (no local network).")
+        }
+        XCTAssertEqual(host.id, uniqueid, "the stable mDNS id should key the host")
+        XCTAssertTrue(host.requiresPairing, "pair=required must surface as requiresPairing")
+        XCTAssertEqual(host.fingerprintHex, String(repeating: "ab", count: 32))
+        XCTAssertFalse(host.host.isEmpty, "a resolved address is required to connect")
+        XCTAssertGreaterThan(host.port, 0, "a resolved port is required to connect")
+    }
+}