Initial commit: NetworkCity — network traffic as a neon city
A native macOS network monitor that renders live traffic as a top-down neon city: your Mac is downtown, remote orgs are glowing districts, and traffic is cars of light driving the roads. Architecture: - NetworkCityCore: swappable data layer behind a ConnectionSource protocol (nettop-backed today), plus pure/tested logic — traffic diffing, org classification (reverse-DNS + CIDR), traffic classes, hub-and-spoke expansion policy, label anti-overlap, and latency→distance layout. - NetworkCityApp: SwiftUI + SpriteKit city — auto-expanding districts, protocol-coloured cars, click-to-inspect panel, and latency-as-distance (districts glide to their measured RTT). - nettop-probe: CLI proof of the data layer. 44 tests passing. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
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import SpriteKit
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/// A single endpoint (one server IP) belonging to an org — a small glowing
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/// satellite that appears when its district fans out.
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final class EndpointNode: SKNode {
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private let glow: SKSpriteNode
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private let core: SKShapeNode
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override init() {
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glow = SKSpriteNode(texture: Textures.softCircle)
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core = SKShapeNode(circleOfRadius: 2.5)
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super.init()
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glow.color = Palette.building
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glow.colorBlendFactor = 1
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glow.blendMode = .add
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glow.setScale(0.12)
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glow.alpha = 0.7
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addChild(glow)
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core.fillColor = Palette.building
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core.strokeColor = .white
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core.lineWidth = 0.4
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addChild(core)
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}
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required init?(coder: NSCoder) { fatalError() }
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func pulse() {
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core.removeAction(forKey: "pulse")
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core.run(.sequence([.scale(to: 1.8, duration: 0.12), .scale(to: 1.0, duration: 0.3)]), withKey: "pulse")
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glow.removeAction(forKey: "flare")
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glow.run(.sequence([.fadeAlpha(to: 1.0, duration: 0.12), .fadeAlpha(to: 0.7, duration: 0.4)]), withKey: "flare")
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}
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}
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/// A destination *organization* rendered as a glowing district hub. When busy it
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/// fans out into its known endpoints (hub-and-spoke); when quiet it collapses
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/// back to a single labelled hub.
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final class BuildingNode: SKNode {
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private let glow: SKSpriteNode
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private let core: SKShapeNode
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private let title: SKLabelNode
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private let subtitle: SKLabelNode
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private var cumulative: Double = 0
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private let spokeLayer = SKNode()
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private let endpointLayer = SKNode()
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private var endpointNodes: [String: EndpointNode] = [:]
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private var knownHosts: Set<String> = []
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private(set) var isExpanded = false
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private let maxEndpoints = 20
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private let fanSpread = 75.0 * .pi / 180 // half-arc the spokes spread over
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private let spokeRadius: CGFloat = 82
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init(title titleText: String, subtitle subtitleText: String) {
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glow = SKSpriteNode(texture: Textures.softCircle)
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core = SKShapeNode(circleOfRadius: 5)
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title = SKLabelNode(text: titleText)
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subtitle = SKLabelNode(text: subtitleText)
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super.init()
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spokeLayer.zPosition = -1
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addChild(spokeLayer)
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addChild(endpointLayer)
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glow.color = Palette.building
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glow.colorBlendFactor = 1
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glow.blendMode = .add
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glow.setScale(0.30)
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glow.alpha = 0.85
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addChild(glow)
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core.fillColor = Palette.building
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core.strokeColor = .white
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core.lineWidth = 0.5
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core.glowWidth = 1
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addChild(core)
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title.fontName = "Menlo-Bold"
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title.fontSize = 13
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title.fontColor = .white
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title.verticalAlignmentMode = .top
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title.position = CGPoint(x: 0, y: -12)
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addChild(title)
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subtitle.fontName = "Menlo"
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subtitle.fontSize = 10
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subtitle.fontColor = Palette.building.withAlphaComponent(0.85)
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subtitle.verticalAlignmentMode = .top
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subtitle.position = CGPoint(x: 0, y: -27)
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addChild(subtitle)
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}
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required init?(coder: NSCoder) { fatalError() }
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func update(subtitle text: String) {
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if subtitle.text != text { subtitle.text = text }
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}
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var knownHostCount: Int { knownHosts.count }
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/// The label box (title + subtitle) relative to this node's center, used for
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/// collision-aware placement so labels don't overlap their neighbours.
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var labelFootprint: CGRect {
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title.calculateAccumulatedFrame().union(subtitle.calculateAccumulatedFrame())
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}
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func note(activeHosts: [String]) { knownHosts.formUnion(activeHosts) }
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/// React to a tick of traffic: grow toward a size set by total volume, and
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/// pulse so the eye catches the activity.
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func receive(bytes: Double) {
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cumulative += bytes
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let target = (0.30 + CGFloat(log10(cumulative + 1)) * 0.09).clamped(0.30, 1.05)
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glow.removeAction(forKey: "resize")
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glow.run(.scale(to: target, duration: 0.6), withKey: "resize")
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core.removeAction(forKey: "pulse")
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core.run(.sequence([
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.scale(to: 1.9, duration: 0.12),
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.scale(to: 1.0, duration: 0.35),
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]), withKey: "pulse")
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}
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// MARK: - Expansion
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/// The capped, stably-ordered list of endpoints we actually draw.
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private var renderedHosts: [String] { knownHosts.sorted().prefix(maxEndpoints).map { $0 } }
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/// Local offset of an endpoint, fanned outward (away from downtown at origin).
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private func offset(forIndex i: Int, count: Int, host: String) -> CGPoint {
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let outward = atan2(position.y, position.x)
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let angle: CGFloat
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if count <= 1 {
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angle = outward
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} else {
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let t = CGFloat(i) / CGFloat(count - 1) // 0…1 across the arc
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angle = outward - fanSpread + 2 * fanSpread * t
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}
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let depth = spokeRadius + CGFloat(stableHash(host) % 4) * 11
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return CGPoint(x: cos(angle) * depth, y: sin(angle) * depth)
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}
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/// Scene-space position of an endpoint (for routing cars along its spoke).
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func worldPosition(forEndpoint host: String) -> CGPoint {
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let hosts = renderedHosts
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guard let i = hosts.firstIndex(of: host) else { return position }
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let o = offset(forIndex: i, count: hosts.count, host: host)
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return CGPoint(x: position.x + o.x, y: position.y + o.y)
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}
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func setExpanded(_ on: Bool) {
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if on {
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if !isExpanded {
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isExpanded = true
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if ProcessInfo.processInfo.environment["NC_DEBUG"] != nil {
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FileHandle.standardError.write(Data("[expand] \(title.text ?? "?") fanned out → \(knownHostCount) endpoints\n".utf8))
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}
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endpointLayer.alpha = 0
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spokeLayer.alpha = 0
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endpointLayer.run(.fadeIn(withDuration: 0.4))
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spokeLayer.run(.fadeAlpha(to: 0.5, duration: 0.4))
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}
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layoutEndpoints()
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} else if isExpanded {
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isExpanded = false
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endpointLayer.run(.fadeOut(withDuration: 0.35))
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spokeLayer.run(.sequence([.fadeOut(withDuration: 0.35), .run { [weak self] in
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self?.spokeLayer.removeAllChildren()
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self?.endpointLayer.removeAllChildren()
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self?.endpointNodes.removeAll()
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}]))
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}
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}
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func pulseEndpoint(_ host: String) {
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endpointNodes[host]?.pulse()
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}
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private func layoutEndpoints() {
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let hosts = renderedHosts
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spokeLayer.removeAllChildren()
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let spokes = CGMutablePath()
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for (i, host) in hosts.enumerated() {
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let target = offset(forIndex: i, count: hosts.count, host: host)
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let node = endpointNodes[host] ?? {
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let n = EndpointNode()
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n.position = .zero
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n.alpha = 0
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n.run(.fadeIn(withDuration: 0.3))
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endpointLayer.addChild(n)
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endpointNodes[host] = n
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return n
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}()
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node.run(.move(to: target, duration: 0.3))
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spokes.move(to: .zero)
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spokes.addLine(to: target)
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}
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// drop endpoints that fell out of the capped set
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for (host, node) in endpointNodes where !hosts.contains(host) {
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node.removeFromParent()
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endpointNodes[host] = nil
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}
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let line = SKShapeNode(path: spokes)
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line.strokeColor = Palette.building.withAlphaComponent(0.4)
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line.lineWidth = 1
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spokeLayer.addChild(line)
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}
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}
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@@ -0,0 +1,387 @@
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import SpriteKit
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import NetworkCityCore
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/// Traffic of one class to/from one endpoint in a single tick.
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struct ClassFlow {
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let cls: TrafficClass
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let inBytes: UInt64
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let outBytes: UInt64
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}
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/// One endpoint's traffic within a district for a single tick, split by class.
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struct EndpointTraffic {
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let host: String
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let flows: [ClassFlow]
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var inBytes: UInt64 { flows.reduce(0) { $0 + $1.inBytes } }
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var outBytes: UInt64 { flows.reduce(0) { $0 + $1.outBytes } }
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}
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/// One org's traffic for a single tick, ready to render as a district.
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struct DistrictTraffic {
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let key: String
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let title: String
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var subtitle: String
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var inBytes: UInt64
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var outBytes: UInt64
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var endpoints: [EndpointTraffic]
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var rttMs: Double? = nil // measured round-trip time → distance from downtown
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}
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/// The city. Downtown (your Mac) glows at the origin; every org is a district
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/// hub placed at a deterministic spot around it, connected by a road. Busy
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/// districts fan out into their endpoints (hub-and-spoke); cars of light flow
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/// the full path — cyan inbound for downloads, amber outbound for uploads.
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final class CityScene: SKScene {
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private let cam = SKCameraNode()
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private let worldRadius: CGFloat = 540
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private var buildings: [String: BuildingNode] = [:]
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private var roads: [String: SKShapeNode] = [:]
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private var latencyRadius: [String: CGFloat] = [:]
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private var ringKey: String?
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private let roadLayer = SKNode()
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private let carLayer = SKNode()
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private let buildingLayer = SKNode()
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// Auto-expand: an org's spokes stay open for a few ticks after it last
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// ranked among the busiest, giving a smooth tail instead of flicker.
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private let expansion = ExpansionPolicy()
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/// Number of districts currently on the map (for the HUD).
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var buildingCount: Int { buildings.count }
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/// Called with a district key when a hub is clicked, or nil when empty space
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/// is clicked (deselect).
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var onSelect: ((String?) -> Void)?
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private let selectionRing = SKShapeNode(circleOfRadius: 24)
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private var dragDistance: CGFloat = 0
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override func didMove(to view: SKView) {
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backgroundColor = Palette.background
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scaleMode = .resizeFill
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anchorPoint = CGPoint(x: 0.5, y: 0.5)
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drawGrid()
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addChild(roadLayer)
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addChild(carLayer)
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addChild(buildingLayer)
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addDowntown()
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selectionRing.strokeColor = .white
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selectionRing.lineWidth = 2
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selectionRing.glowWidth = 4
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selectionRing.alpha = 0
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selectionRing.zPosition = 40
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addChild(selectionRing)
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camera = cam
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cam.setScale(1.25)
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addChild(cam)
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}
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// MARK: - Selection
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/// Rings the selected district (or fades the ring out when nil).
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func highlight(key: String?) {
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ringKey = key
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selectionRing.removeAllActions()
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if let key, let building = buildings[key] {
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selectionRing.position = building.position
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selectionRing.alpha = 1
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selectionRing.run(.repeatForever(.sequence([
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.scale(to: 1.18, duration: 0.7), .scale(to: 1.0, duration: 0.7),
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])))
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} else {
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selectionRing.run(.fadeOut(withDuration: 0.2))
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}
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}
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/// Nearest district hub within a (zoom-aware) radius of the point.
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private func districtKey(at point: CGPoint) -> String? {
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let radius = 30 * cam.xScale
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var best: (key: String, dist: CGFloat)?
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for (key, building) in buildings {
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let d = hypot(point.x - building.position.x, point.y - building.position.y)
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if d < radius, best == nil || d < best!.dist { best = (key, d) }
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}
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return best?.key
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}
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// MARK: - Static scenery
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private func drawGrid() {
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let grid = SKNode()
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let step: CGFloat = 80
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let extent: CGFloat = 1400
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let path = CGMutablePath()
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var x = -extent
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while x <= extent { path.move(to: CGPoint(x: x, y: -extent)); path.addLine(to: CGPoint(x: x, y: extent)); x += step }
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var y = -extent
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while y <= extent { path.move(to: CGPoint(x: -extent, y: y)); path.addLine(to: CGPoint(x: extent, y: y)); y += step }
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let line = SKShapeNode(path: path)
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line.strokeColor = Palette.grid.withAlphaComponent(0.18)
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line.lineWidth = 1
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grid.addChild(line)
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grid.zPosition = -100
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addChild(grid)
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}
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private func addDowntown() {
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let glow = SKSpriteNode(texture: Textures.softCircle)
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glow.color = Palette.hub
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glow.colorBlendFactor = 1
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glow.blendMode = .add
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glow.setScale(1.1)
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glow.zPosition = -10
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glow.run(.repeatForever(.sequence([
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.fadeAlpha(to: 0.6, duration: 1.8),
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.fadeAlpha(to: 1.0, duration: 1.8),
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])))
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addChild(glow)
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let core = SKShapeNode(circleOfRadius: 9)
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core.fillColor = Palette.hub
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core.strokeColor = .white
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core.glowWidth = 2
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addChild(core)
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let label = SKLabelNode(text: "▸ this mac")
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label.fontName = "Menlo-Bold"
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label.fontSize = 13
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label.fontColor = Palette.hub
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label.verticalAlignmentMode = .top
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label.position = CGPoint(x: 0, y: -16)
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addChild(label)
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}
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// MARK: - Live data
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/// Render a tick of per-org traffic: ensure each district exists, decide
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/// which ones are busy enough to fan out, then dispatch cars accordingly.
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func apply(_ districts: [DistrictTraffic]) {
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// 1. Ensure hubs exist and learn their endpoints.
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for t in districts {
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let hub = building(forKey: t.key, title: t.title, subtitle: t.subtitle)
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hub.note(activeHosts: t.endpoints.map(\.host))
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hub.receive(bytes: Double(t.inBytes + t.outBytes))
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if let rtt = t.rttMs { repositionToLatency(key: t.key, rttMs: rtt) }
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}
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// 2. Decide which districts fan out. Evaluate *every* known district
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// (not just this tick's active ones) so a TTL tail keeps idle hubs
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// open. A district needs ≥2 endpoints to have anything to expand.
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let bytesByKey = Dictionary(districts.map { ($0.key, $0.inBytes + $0.outBytes) },
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uniquingKeysWith: +)
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let entries = buildings.map { key, hub in
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ExpansionPolicy.District(key: key, bytes: bytesByKey[key] ?? 0, endpointCount: hub.knownHostCount)
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}
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let expanded = expansion.update(entries)
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if ProcessInfo.processInfo.environment["NC_DEBUG"] != nil {
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let top = districts.sorted { ($0.inBytes + $0.outBytes) > ($1.inBytes + $1.outBytes) }.prefix(3)
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.map { "\($0.title)=\(($0.inBytes + $0.outBytes) / 1024)KB/ep\(buildings[$0.key]?.knownHostCount ?? 0)/\(expanded.contains($0.key) ? "EXP" : "—")" }
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.joined(separator: " ")
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var classKB: [TrafficClass: UInt64] = [:]
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for d in districts { for e in d.endpoints { for f in e.flows { classKB[f.cls, default: 0] += f.inBytes + f.outBytes } } }
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let mix = TrafficClass.allCases.compactMap { c in classKB[c].map { "\(c.rawValue):\($0 / 1024)KB" } }.joined(separator: " ")
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FileHandle.standardError.write(Data("[tick] \(top) | \(mix)\n".utf8))
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}
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// 3. Apply expansion state to all hubs, then route this tick's cars.
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for (key, hub) in buildings { hub.setExpanded(expanded.contains(key)) }
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||||
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for t in districts {
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guard let hub = buildings[t.key] else { continue }
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if expanded.contains(t.key) {
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// Per endpoint, per class: cars run the full Mac→hub→endpoint path.
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||||
for e in t.endpoints {
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let dest = hub.worldPosition(forEndpoint: e.host)
|
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for f in e.flows {
|
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dispatchSpokeCars(carCount(f.inBytes), hub: hub.position, endpoint: dest, inbound: true, cls: f.cls, bytes: f.inBytes)
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dispatchSpokeCars(carCount(f.outBytes), hub: hub.position, endpoint: dest, inbound: false, cls: f.cls, bytes: f.outBytes)
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||||
}
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||||
if e.inBytes + e.outBytes > 0 { hub.pulseEndpoint(e.host) }
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||||
}
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||||
} else {
|
||||
// Collapsed: aggregate every endpoint's flows by class onto the hub.
|
||||
var byClass: [TrafficClass: (UInt64, UInt64)] = [:]
|
||||
for e in t.endpoints {
|
||||
for f in e.flows {
|
||||
let prior = byClass[f.cls] ?? (0, 0)
|
||||
byClass[f.cls] = (prior.0 + f.inBytes, prior.1 + f.outBytes)
|
||||
}
|
||||
}
|
||||
for (cls, bytes) in byClass {
|
||||
dispatchDirectCars(carCount(bytes.0), to: hub.position, inbound: true, cls: cls, bytes: bytes.0)
|
||||
dispatchDirectCars(carCount(bytes.1), to: hub.position, inbound: false, cls: cls, bytes: bytes.1)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private func carCount(_ bytes: UInt64) -> Int {
|
||||
guard bytes > 0 else { return 0 }
|
||||
return max(1, min(7, Int(Double(bytes) / 16_384))) // ~1 car / 16 KB, capped
|
||||
}
|
||||
|
||||
// MARK: - Buildings & roads
|
||||
|
||||
private func building(forKey key: String, title: String, subtitle: String) -> BuildingNode {
|
||||
if let existing = buildings[key] {
|
||||
existing.update(subtitle: subtitle)
|
||||
return existing
|
||||
}
|
||||
|
||||
let node = BuildingNode(title: title, subtitle: subtitle)
|
||||
node.position = placement(for: key, footprint: node.labelFootprint)
|
||||
node.alpha = 0
|
||||
node.run(.fadeIn(withDuration: 0.6))
|
||||
buildingLayer.addChild(node)
|
||||
buildings[key] = node
|
||||
|
||||
if ProcessInfo.processInfo.environment["NC_DEBUG"] != nil {
|
||||
let f = node.labelFootprint
|
||||
FileHandle.standardError.write(Data(String(format: "[place] %@ pos=(%.0f,%.0f) box=%.0fx%.0f\n",
|
||||
title, node.position.x, node.position.y, f.width, f.height).utf8))
|
||||
}
|
||||
|
||||
let path = CGMutablePath()
|
||||
path.move(to: .zero)
|
||||
path.addLine(to: node.position)
|
||||
let road = SKShapeNode(path: path)
|
||||
road.strokeColor = Palette.road.withAlphaComponent(0.55)
|
||||
road.lineWidth = 1.5
|
||||
road.zPosition = -20
|
||||
roadLayer.addChild(road)
|
||||
roads[key] = road
|
||||
|
||||
return node
|
||||
}
|
||||
|
||||
/// Glide a hub to the radius implied by its measured RTT, keeping its angle.
|
||||
/// The road (and selection ring, if attached) follow.
|
||||
private func repositionToLatency(key: String, rttMs: Double) {
|
||||
guard let building = buildings[key] else { return }
|
||||
let target = LatencyLayout.radius(forRTT: rttMs)
|
||||
if let current = latencyRadius[key], abs(current - target) < 18 { return }
|
||||
latencyRadius[key] = target
|
||||
|
||||
let angle = atan2(building.position.y, building.position.x)
|
||||
let dest = CGPoint(x: cos(angle) * Double(target), y: sin(angle) * Double(target))
|
||||
building.run(.move(to: dest, duration: 0.8))
|
||||
|
||||
if let road = roads[key] {
|
||||
let path = CGMutablePath()
|
||||
path.move(to: .zero)
|
||||
path.addLine(to: dest)
|
||||
road.path = path
|
||||
}
|
||||
if ringKey == key { selectionRing.run(.move(to: dest, duration: 0.8)) }
|
||||
}
|
||||
|
||||
/// Deterministic radial seed (angle + ring from the key's hash), then spiral
|
||||
/// out from there until the label box clears every existing district.
|
||||
private func placement(for key: String, footprint: CGRect) -> CGPoint {
|
||||
let h = stableHash(key)
|
||||
let baseAngle = Double(h % 3600) / 3600 * 2 * .pi
|
||||
let ring = Double((h >> 16) % 1000) / 1000
|
||||
let baseRadius = 165 + Double(ring) * Double(worldRadius - 165)
|
||||
|
||||
let existing = buildings.values.map {
|
||||
$0.labelFootprint.offsetBy(dx: $0.position.x, dy: $0.position.y)
|
||||
}
|
||||
return LayoutSolver.placeNonOverlapping(
|
||||
baseAngle: baseAngle, baseRadius: baseRadius,
|
||||
localRect: footprint, existing: existing, pad: 18
|
||||
)
|
||||
}
|
||||
|
||||
// MARK: - Cars
|
||||
|
||||
private func dispatchDirectCars(_ count: Int, to dest: CGPoint, inbound: Bool, cls: TrafficClass, bytes: UInt64) {
|
||||
guard count > 0 else { return }
|
||||
let style = carStyle(cls, bytes: bytes)
|
||||
stagger(count) { [weak self] in
|
||||
guard let self else { return }
|
||||
let path = CGMutablePath()
|
||||
path.move(to: inbound ? dest : .zero)
|
||||
path.addLine(to: inbound ? .zero : dest)
|
||||
self.runCar(along: path, start: inbound ? dest : .zero, distance: hypot(dest.x, dest.y), style: style)
|
||||
}
|
||||
}
|
||||
|
||||
private func dispatchSpokeCars(_ count: Int, hub: CGPoint, endpoint: CGPoint, inbound: Bool, cls: TrafficClass, bytes: UInt64) {
|
||||
guard count > 0 else { return }
|
||||
let style = carStyle(cls, bytes: bytes)
|
||||
stagger(count) { [weak self] in
|
||||
guard let self else { return }
|
||||
let path = CGMutablePath()
|
||||
if inbound {
|
||||
path.move(to: endpoint); path.addLine(to: hub); path.addLine(to: .zero)
|
||||
} else {
|
||||
path.move(to: .zero); path.addLine(to: hub); path.addLine(to: endpoint)
|
||||
}
|
||||
let dist = hypot(hub.x, hub.y) + hypot(endpoint.x - hub.x, endpoint.y - hub.y)
|
||||
self.runCar(along: path, start: inbound ? endpoint : .zero, distance: dist, style: style)
|
||||
}
|
||||
}
|
||||
|
||||
/// Spreads `count` spawns across most of the interval so cars stream rather
|
||||
/// than appear all at once.
|
||||
private func stagger(_ count: Int, _ spawn: @escaping () -> Void) {
|
||||
guard count > 0 else { return }
|
||||
for i in 0..<count {
|
||||
let delay = Double(i) / Double(count) * 1.4
|
||||
run(.sequence([.wait(forDuration: delay), .run(spawn)]))
|
||||
}
|
||||
}
|
||||
|
||||
private func runCar(along path: CGPath, start: CGPoint, distance: CGFloat, style: CarStyle) {
|
||||
let car = SKSpriteNode(texture: Textures.softCircle)
|
||||
car.color = style.color
|
||||
car.colorBlendFactor = 1
|
||||
car.blendMode = .add
|
||||
car.xScale = style.scale * style.elongation
|
||||
car.yScale = style.scale
|
||||
car.position = start
|
||||
car.zPosition = 5
|
||||
carLayer.addChild(car)
|
||||
|
||||
let orient = style.elongation > 1.05 // streaks orient along their path
|
||||
let duration = Double((distance / style.speed).clamped(0.6, 2.8)) * Double.random(in: 0.85...1.15)
|
||||
car.run(.sequence([
|
||||
.group([
|
||||
.follow(path, asOffset: false, orientToPath: orient, duration: duration),
|
||||
.sequence([.fadeAlpha(to: 1.0, duration: duration * 0.15),
|
||||
.wait(forDuration: duration * 0.55),
|
||||
.fadeAlpha(to: 0.0, duration: duration * 0.3)]),
|
||||
]),
|
||||
.removeFromParent(),
|
||||
]))
|
||||
}
|
||||
|
||||
// MARK: - Pan, zoom & click (macOS)
|
||||
|
||||
override func scrollWheel(with event: NSEvent) {
|
||||
let factor = 1 - event.scrollingDeltaY * 0.006
|
||||
cam.setScale((cam.xScale * factor).clamped(0.45, 3.2))
|
||||
}
|
||||
|
||||
override func mouseDown(with event: NSEvent) {
|
||||
dragDistance = 0
|
||||
}
|
||||
|
||||
override func mouseDragged(with event: NSEvent) {
|
||||
dragDistance += abs(event.deltaX) + abs(event.deltaY)
|
||||
cam.position.x -= event.deltaX * cam.xScale
|
||||
cam.position.y += event.deltaY * cam.xScale
|
||||
}
|
||||
|
||||
override func mouseUp(with event: NSEvent) {
|
||||
// A near-stationary press is a click (select); a drag is a pan.
|
||||
guard dragDistance < 6, let view else { return }
|
||||
// Canonical, camera-correct window → view → scene conversion.
|
||||
let viewPoint = view.convert(event.locationInWindow, from: nil)
|
||||
onSelect?(districtKey(at: convertPoint(fromView: viewPoint)))
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,200 @@
|
||||
import SwiftUI
|
||||
import SpriteKit
|
||||
import NetworkCityCore
|
||||
|
||||
/// The SpriteKit city with a glassy stats HUD floated on top.
|
||||
struct CityView: View {
|
||||
@ObservedObject var controller: TrafficController
|
||||
|
||||
var body: some View {
|
||||
ZStack(alignment: .topLeading) {
|
||||
SpriteView(scene: controller.scene, options: [.ignoresSiblingOrder])
|
||||
.ignoresSafeArea()
|
||||
|
||||
hud
|
||||
.padding(14)
|
||||
|
||||
if let inspection = controller.selection {
|
||||
inspector(inspection)
|
||||
.padding(14)
|
||||
.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topTrailing)
|
||||
.transition(.move(edge: .trailing).combined(with: .opacity))
|
||||
}
|
||||
}
|
||||
.animation(.easeOut(duration: 0.18), value: controller.selection?.id)
|
||||
.onAppear { controller.start() }
|
||||
}
|
||||
|
||||
// MARK: - Inspector panel
|
||||
|
||||
static func color(_ c: TrafficClass) -> Color {
|
||||
switch c {
|
||||
case .dns: return Color(red: 1.00, green: 0.82, blue: 0.25)
|
||||
case .https: return Color(red: 0.22, green: 0.88, blue: 1.00)
|
||||
case .http: return Color(red: 1.00, green: 0.48, blue: 0.24)
|
||||
case .quic: return Color(red: 0.71, green: 0.48, blue: 1.00)
|
||||
case .other: return Color(red: 0.55, green: 0.60, blue: 0.72)
|
||||
}
|
||||
}
|
||||
|
||||
private func inspector(_ insp: OrgInspection) -> some View {
|
||||
VStack(alignment: .leading, spacing: 10) {
|
||||
HStack {
|
||||
Text(insp.title)
|
||||
.font(.system(size: 16, weight: .bold, design: .monospaced))
|
||||
.foregroundStyle(.white)
|
||||
Spacer(minLength: 12)
|
||||
Button { controller.deselect() } label: {
|
||||
Image(systemName: "xmark.circle.fill")
|
||||
.foregroundStyle(.white.opacity(0.5))
|
||||
}
|
||||
.buttonStyle(.plain)
|
||||
}
|
||||
|
||||
HStack(spacing: 16) {
|
||||
Text("▼ \(fmt(insp.downKBs))").foregroundStyle(.cyan)
|
||||
Text("▲ \(fmt(insp.upKBs))").foregroundStyle(.orange)
|
||||
Spacer(minLength: 4)
|
||||
Text("\(insp.endpointCount) pts").foregroundStyle(.white.opacity(0.6))
|
||||
}
|
||||
.font(.system(size: 12, weight: .semibold, design: .monospaced))
|
||||
|
||||
if !insp.processes.isEmpty {
|
||||
Text(insp.processes.joined(separator: ", "))
|
||||
.font(.system(size: 10, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.55))
|
||||
.lineLimit(2)
|
||||
}
|
||||
|
||||
Divider().overlay(.white.opacity(0.15))
|
||||
|
||||
Text("ENDPOINTS").font(.system(size: 9, weight: .bold, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.4))
|
||||
|
||||
ScrollView {
|
||||
VStack(alignment: .leading, spacing: 7) {
|
||||
ForEach(insp.endpoints) { ep in endpointRow(ep) }
|
||||
}
|
||||
}
|
||||
.frame(maxHeight: 320)
|
||||
}
|
||||
.padding(14)
|
||||
.frame(width: 290)
|
||||
.background(.black.opacity(0.62), in: RoundedRectangle(cornerRadius: 12))
|
||||
.overlay(RoundedRectangle(cornerRadius: 12).stroke(.white.opacity(0.1)))
|
||||
}
|
||||
|
||||
private func endpointRow(_ ep: EndpointInfo) -> some View {
|
||||
HStack(alignment: .top, spacing: 8) {
|
||||
Circle().fill(Self.color(ep.topClass)).frame(width: 7, height: 7)
|
||||
.shadow(color: Self.color(ep.topClass), radius: 3)
|
||||
.padding(.top, 3)
|
||||
VStack(alignment: .leading, spacing: 1) {
|
||||
Text(ep.host)
|
||||
.font(.system(size: 11, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.9))
|
||||
if let rdns = ep.rdns {
|
||||
Text(rdns)
|
||||
.font(.system(size: 9, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.45))
|
||||
.lineLimit(1).truncationMode(.middle)
|
||||
}
|
||||
if let rtt = ep.rttMs {
|
||||
Text("\(Int(rtt)) ms")
|
||||
.font(.system(size: 9, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.5))
|
||||
}
|
||||
}
|
||||
Spacer(minLength: 6)
|
||||
VStack(alignment: .trailing, spacing: 1) {
|
||||
if ep.downKBs >= 0.1 { Text("▼\(fmt(ep.downKBs))").foregroundStyle(.cyan.opacity(0.85)) }
|
||||
if ep.upKBs >= 0.1 { Text("▲\(fmt(ep.upKBs))").foregroundStyle(.orange.opacity(0.85)) }
|
||||
if ep.downKBs < 0.1 && ep.upKBs < 0.1 { Text("idle").foregroundStyle(.white.opacity(0.3)) }
|
||||
}
|
||||
.font(.system(size: 9, weight: .semibold, design: .monospaced))
|
||||
}
|
||||
}
|
||||
|
||||
private var hud: some View {
|
||||
VStack(alignment: .leading, spacing: 6) {
|
||||
HStack(spacing: 8) {
|
||||
Circle()
|
||||
.fill(controller.live ? Color.green : Color.orange)
|
||||
.frame(width: 8, height: 8)
|
||||
Text("NETWORKCITY")
|
||||
.font(.system(size: 14, weight: .bold, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.9))
|
||||
}
|
||||
Divider().frame(width: 168).overlay(.white.opacity(0.15))
|
||||
stat("▼ down", controller.downKBs, .cyan)
|
||||
stat("▲ up", controller.upKBs, .orange)
|
||||
stat(label: "districts", value: "\(controller.districtCount)")
|
||||
|
||||
Divider().frame(width: 168).overlay(.white.opacity(0.15))
|
||||
legend
|
||||
|
||||
Text(controller.live ? "live · color = protocol · motion = direction"
|
||||
: "warming up…")
|
||||
.font(.system(size: 10, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.4))
|
||||
.padding(.top, 2)
|
||||
}
|
||||
.padding(12)
|
||||
.background(.black.opacity(0.45), in: RoundedRectangle(cornerRadius: 10))
|
||||
.overlay(RoundedRectangle(cornerRadius: 10).stroke(.white.opacity(0.08)))
|
||||
}
|
||||
|
||||
private static let legendItems: [(String, Color)] = [
|
||||
("DNS", Color(red: 1.00, green: 0.82, blue: 0.25)),
|
||||
("HTTPS", Color(red: 0.22, green: 0.88, blue: 1.00)),
|
||||
("HTTP", Color(red: 1.00, green: 0.48, blue: 0.24)),
|
||||
("QUIC", Color(red: 0.71, green: 0.48, blue: 1.00)),
|
||||
("Other", Color(red: 0.55, green: 0.60, blue: 0.72)),
|
||||
]
|
||||
|
||||
private var legend: some View {
|
||||
VStack(alignment: .leading, spacing: 4) {
|
||||
ForEach(Self.legendItems, id: \.0) { name, color in
|
||||
HStack(spacing: 8) {
|
||||
Circle().fill(color).frame(width: 7, height: 7)
|
||||
.shadow(color: color, radius: 3)
|
||||
Text(name)
|
||||
.font(.system(size: 11, design: .monospaced))
|
||||
.foregroundStyle(.white.opacity(0.8))
|
||||
}
|
||||
}
|
||||
}
|
||||
.frame(width: 168, alignment: .leading)
|
||||
}
|
||||
|
||||
private func stat(_ label: String, _ kbs: Double, _ color: Color) -> some View {
|
||||
HStack {
|
||||
Text(label)
|
||||
.font(.system(size: 12, design: .monospaced))
|
||||
.foregroundStyle(color.opacity(0.9))
|
||||
Spacer(minLength: 16)
|
||||
Text(format(kbs))
|
||||
.font(.system(size: 12, weight: .semibold, design: .monospaced))
|
||||
.foregroundStyle(.white)
|
||||
}
|
||||
.frame(width: 168)
|
||||
}
|
||||
|
||||
private func stat(label: String, value: String) -> some View {
|
||||
HStack {
|
||||
Text(label).font(.system(size: 12, design: .monospaced)).foregroundStyle(.white.opacity(0.7))
|
||||
Spacer(minLength: 16)
|
||||
Text(value).font(.system(size: 12, weight: .semibold, design: .monospaced)).foregroundStyle(.white)
|
||||
}
|
||||
.frame(width: 168)
|
||||
}
|
||||
|
||||
private func format(_ kbs: Double) -> String {
|
||||
kbs >= 1024 ? String(format: "%.1f MB/s", kbs / 1024) : String(format: "%.0f KB/s", kbs)
|
||||
}
|
||||
|
||||
/// Compact rate for the dense inspector rows.
|
||||
private func fmt(_ kbs: Double) -> String {
|
||||
kbs >= 1024 ? String(format: "%.1fM", kbs / 1024) : String(format: "%.0fK", kbs)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,25 @@
|
||||
import NetworkCityCore
|
||||
|
||||
/// One endpoint's live detail for the inspector panel.
|
||||
struct EndpointInfo: Identifiable {
|
||||
var id: String { host }
|
||||
let host: String
|
||||
let rdns: String?
|
||||
let downKBs: Double
|
||||
let upKBs: Double
|
||||
let topClass: TrafficClass
|
||||
let rttMs: Double?
|
||||
}
|
||||
|
||||
/// A live snapshot of one district, shown when its hub is clicked. Rebuilt each
|
||||
/// tick while selected so the panel updates in real time.
|
||||
struct OrgInspection: Identifiable {
|
||||
var id: String { key }
|
||||
let key: String
|
||||
let title: String
|
||||
let downKBs: Double
|
||||
let upKBs: Double
|
||||
let endpointCount: Int
|
||||
let endpoints: [EndpointInfo]
|
||||
let processes: [String]
|
||||
}
|
||||
@@ -0,0 +1,27 @@
|
||||
import SwiftUI
|
||||
import AppKit
|
||||
|
||||
@main
|
||||
struct NetworkCityApp: App {
|
||||
@NSApplicationDelegateAdaptor(AppDelegate.self) private var delegate
|
||||
@StateObject private var controller = TrafficController()
|
||||
|
||||
var body: some Scene {
|
||||
WindowGroup("NetworkCity") {
|
||||
CityView(controller: controller)
|
||||
.frame(minWidth: 900, minHeight: 620)
|
||||
.background(.black)
|
||||
}
|
||||
.windowStyle(.hiddenTitleBar)
|
||||
}
|
||||
}
|
||||
|
||||
/// Running as an SPM executable (no app bundle), so promote ourselves to a
|
||||
/// regular foreground app and grab focus on launch.
|
||||
final class AppDelegate: NSObject, NSApplicationDelegate {
|
||||
func applicationDidFinishLaunching(_ notification: Notification) {
|
||||
NSApp.setActivationPolicy(.regular)
|
||||
NSApp.activate(ignoringOtherApps: true)
|
||||
}
|
||||
func applicationShouldTerminateAfterLastWindowClosed(_ app: NSApplication) -> Bool { true }
|
||||
}
|
||||
@@ -0,0 +1,242 @@
|
||||
import SwiftUI
|
||||
import NetworkCityCore
|
||||
|
||||
/// Owns the data feed, enriches it (real process names + reverse-DNS org
|
||||
/// grouping), and bridges per-district traffic to the scene on the main actor.
|
||||
@MainActor
|
||||
final class TrafficController: ObservableObject {
|
||||
let scene = CityScene(size: CGSize(width: 1200, height: 800))
|
||||
|
||||
@Published var downKBs: Double = 0
|
||||
@Published var upKBs: Double = 0
|
||||
@Published var districtCount: Int = 0
|
||||
@Published var live = false
|
||||
@Published var selection: OrgInspection?
|
||||
|
||||
private let source: ConnectionSource = NettopSource()
|
||||
private let differ = TrafficDiffer()
|
||||
private let namer = ProcessNamer()
|
||||
private let prober = LatencyProber()
|
||||
private let ownPID = Int32(ProcessInfo.processInfo.processIdentifier)
|
||||
|
||||
private var orgForHost: [String: Org] = [:] // resolved IP -> org
|
||||
private var pending: Set<String> = [] // resolutions in flight
|
||||
private var rttForHost: [String: Double] = [:] // measured RTT (ms)
|
||||
private var rttPending: Set<String> = []
|
||||
private var portForHost: [String: UInt16] = [:]
|
||||
private var task: Task<Void, Never>?
|
||||
|
||||
// Inspector state: enough per-org history to render the panel live.
|
||||
private var selectedKey: String?
|
||||
private var orgTitles: [String: String] = [:]
|
||||
private var orgEndpoints: [String: Set<String>] = [:] // all hosts ever seen per org
|
||||
private var orgProcesses: [String: Set<String>] = [:]
|
||||
private var lastEndpointBytes: [String: [String: [TrafficClass: (UInt64, UInt64)]]] = [:]
|
||||
private var lastInterval: TimeInterval = 2
|
||||
|
||||
func start() {
|
||||
guard task == nil else { return }
|
||||
scene.onSelect = { [weak self] key in
|
||||
MainActor.assumeIsolated { self?.select(key) }
|
||||
}
|
||||
if ProcessInfo.processInfo.environment["NC_DEMO"] != nil {
|
||||
startDemo()
|
||||
return
|
||||
}
|
||||
task = Task { [weak self] in
|
||||
guard let self else { return }
|
||||
for await snap in source.snapshots(every: 2.0) {
|
||||
handle(snap)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Offline demo: feeds a synthetic multi-endpoint district through the real
|
||||
/// scene path so the hub-and-spoke fan-out can be exercised without nettop.
|
||||
private func startDemo() {
|
||||
task = Task { [weak self] in
|
||||
guard let self else { return }
|
||||
var tick = 0
|
||||
while !Task.isCancelled {
|
||||
tick += 1
|
||||
let classes: [TrafficClass] = [.https, .quic, .dns, .http, .other]
|
||||
let endpoints = (0..<8).map { i -> EndpointTraffic in
|
||||
let active = (i + tick) % 3 == 0
|
||||
let cls = classes[i % classes.count]
|
||||
let heavy = (cls == .https || cls == .quic) && i % 4 == 0
|
||||
return EndpointTraffic(host: "20.190.\(i).\(10 + i)", flows: [
|
||||
ClassFlow(cls: cls,
|
||||
inBytes: active ? (heavy ? 400_000 : 36_000) : 0,
|
||||
outBytes: active ? 12_000 : 0),
|
||||
])
|
||||
}
|
||||
let inB = endpoints.reduce(0) { $0 + $1.inBytes }
|
||||
let outB = endpoints.reduce(0) { $0 + $1.outBytes }
|
||||
scene.apply([DistrictTraffic(key: "onedrive", title: "OneDrive", subtitle: "OneDrive",
|
||||
inBytes: inB, outBytes: outB, endpoints: endpoints)])
|
||||
|
||||
// Keep the inspector maps live so the demo district is clickable.
|
||||
orgTitles["onedrive"] = "OneDrive"
|
||||
orgEndpoints["onedrive", default: []].formUnion(endpoints.map(\.host))
|
||||
orgProcesses["onedrive", default: []].insert("OneDrive")
|
||||
var bytesMap: [String: [TrafficClass: (UInt64, UInt64)]] = [:]
|
||||
for e in endpoints { for f in e.flows { bytesMap[e.host, default: [:]][f.cls] = (f.inBytes, f.outBytes) } }
|
||||
lastEndpointBytes["onedrive"] = bytesMap
|
||||
if let key = selectedKey { selection = buildInspection(key) }
|
||||
// Verification hook: auto-open the inspector in debug runs.
|
||||
if tick == 3, ProcessInfo.processInfo.environment["NC_DEBUG"] != nil { select("onedrive") }
|
||||
|
||||
downKBs = Double(inB) / 1024 / 2
|
||||
upKBs = Double(outB) / 1024 / 2
|
||||
districtCount = scene.buildingCount
|
||||
live = true
|
||||
try? await Task.sleep(nanoseconds: 2_000_000_000)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func stop() { task?.cancel(); task = nil }
|
||||
|
||||
private func handle(_ snapshot: ConnectionSnapshot) {
|
||||
// Exclude our own traffic so we don't render our latency probes.
|
||||
let deltas = differ.ingest(snapshot).filter { $0.connection.isExternal && $0.connection.pid != ownPID }
|
||||
|
||||
// Group resolved hosts by org; kick off resolution for the rest. A
|
||||
// brand-new host shows up one tick late, which is fine — traffic is
|
||||
// continuous, and this avoids spawning an IP building we'd have to merge.
|
||||
var districts: [String: DistrictTraffic] = [:]
|
||||
// orgKey -> host -> class -> (in, out)
|
||||
var endpoints: [String: [String: [TrafficClass: (UInt64, UInt64)]]] = [:]
|
||||
for d in deltas {
|
||||
let host = d.connection.remote.host
|
||||
guard let org = orgForHost[host] else { resolve(host); continue }
|
||||
|
||||
let proc = namer.name(for: d.connection.pid) ?? d.connection.processName
|
||||
var district = districts[org.key]
|
||||
?? DistrictTraffic(key: org.key, title: org.name, subtitle: proc,
|
||||
inBytes: 0, outBytes: 0, endpoints: [])
|
||||
district.inBytes += d.bytesInDelta
|
||||
district.outBytes += d.bytesOutDelta
|
||||
district.subtitle = proc
|
||||
districts[org.key] = district
|
||||
|
||||
let cls = TrafficClass.classify(proto: d.connection.proto, port: d.connection.remote.port)
|
||||
var hosts = endpoints[org.key] ?? [:]
|
||||
var classes = hosts[host] ?? [:]
|
||||
let prior = classes[cls] ?? (0, 0)
|
||||
classes[cls] = (prior.0 + d.bytesInDelta, prior.1 + d.bytesOutDelta)
|
||||
hosts[host] = classes
|
||||
endpoints[org.key] = hosts
|
||||
|
||||
orgEndpoints[org.key, default: []].insert(host)
|
||||
if let p = d.connection.remote.port, p > 0 { portForHost[host] = UInt16(p) }
|
||||
probeIfNeeded(host)
|
||||
}
|
||||
let rendered = districts.map { key, d -> DistrictTraffic in
|
||||
var d = d
|
||||
d.endpoints = (endpoints[key] ?? [:]).map { host, classMap in
|
||||
EndpointTraffic(host: host, flows: classMap.map {
|
||||
ClassFlow(cls: $0.key, inBytes: $0.value.0, outBytes: $0.value.1)
|
||||
})
|
||||
}
|
||||
// Distance = closest measured edge of this org (the nearest server you're served from).
|
||||
d.rttMs = (orgEndpoints[key] ?? []).compactMap { rttForHost[$0] }.min()
|
||||
return d
|
||||
}
|
||||
scene.apply(rendered)
|
||||
|
||||
// Retain per-org detail for the inspector panel.
|
||||
lastInterval = deltas.first?.interval ?? 2
|
||||
lastEndpointBytes = endpoints
|
||||
for d in rendered {
|
||||
orgTitles[d.key] = d.title
|
||||
orgProcesses[d.key, default: []].insert(d.subtitle)
|
||||
}
|
||||
if let key = selectedKey { selection = buildInspection(key) }
|
||||
|
||||
// HUD totals reflect *all* external traffic, resolved or not, so the
|
||||
// throughput numbers stay honest while districts are still resolving.
|
||||
downKBs = deltas.reduce(0) { $0 + $1.inBytesPerSec } / 1024
|
||||
upKBs = deltas.reduce(0) { $0 + $1.outBytesPerSec } / 1024
|
||||
districtCount = scene.buildingCount
|
||||
live = true
|
||||
}
|
||||
|
||||
// MARK: - Inspector
|
||||
|
||||
func select(_ key: String?) {
|
||||
selectedKey = key
|
||||
scene.highlight(key: key)
|
||||
selection = key.flatMap(buildInspection)
|
||||
if let s = selection, ProcessInfo.processInfo.environment["NC_DEBUG"] != nil {
|
||||
FileHandle.standardError.write(Data("[inspect] \(s.title): \(s.endpointCount) pts ▼\(Int(s.downKBs)) ▲\(Int(s.upKBs)) KB/s top=\(s.endpoints.first?.host ?? "-")\n".utf8))
|
||||
}
|
||||
}
|
||||
|
||||
func deselect() { select(nil) }
|
||||
|
||||
private func buildInspection(_ key: String) -> OrgInspection {
|
||||
let hosts = orgEndpoints[key] ?? []
|
||||
var infos: [EndpointInfo] = []
|
||||
var totalDown = 0.0, totalUp = 0.0
|
||||
|
||||
for host in hosts {
|
||||
let classMap = lastEndpointBytes[key]?[host] ?? [:]
|
||||
var down = 0.0, up = 0.0
|
||||
var top: (cls: TrafficClass, bytes: UInt64)?
|
||||
for (cls, bytes) in classMap {
|
||||
down += Double(bytes.0) / lastInterval / 1024
|
||||
up += Double(bytes.1) / lastInterval / 1024
|
||||
let total = bytes.0 + bytes.1
|
||||
if top == nil || total > top!.bytes { top = (cls, total) }
|
||||
}
|
||||
totalDown += down
|
||||
totalUp += up
|
||||
infos.append(EndpointInfo(host: host, rdns: orgForHost[host]?.resolvedHost,
|
||||
downKBs: down, upKBs: up, topClass: top?.cls ?? .other,
|
||||
rttMs: rttForHost[host]))
|
||||
}
|
||||
infos.sort { ($0.downKBs + $0.upKBs) > ($1.downKBs + $1.upKBs) }
|
||||
|
||||
return OrgInspection(
|
||||
key: key, title: orgTitles[key] ?? key,
|
||||
downKBs: totalDown, upKBs: totalUp,
|
||||
endpointCount: hosts.count, endpoints: infos,
|
||||
processes: (orgProcesses[key] ?? []).sorted()
|
||||
)
|
||||
}
|
||||
|
||||
/// Measure RTT to a newly-seen endpoint once (cached), then store it so the
|
||||
/// next tick can glide its district to the right distance.
|
||||
private func probeIfNeeded(_ host: String) {
|
||||
guard rttForHost[host] == nil, !rttPending.contains(host),
|
||||
let port = portForHost[host] else { return }
|
||||
rttPending.insert(host)
|
||||
Task { [prober] in
|
||||
// Unreachable (firewalled) endpoints read as "far" rather than missing.
|
||||
let rtt = await prober.measure(host: host, port: port) ?? LatencyLayout.rttCeiling
|
||||
rttForHost[host] = rtt
|
||||
rttPending.remove(host)
|
||||
if ProcessInfo.processInfo.environment["NC_DEBUG"] != nil {
|
||||
FileHandle.standardError.write(Data("[rtt] \(host):\(port) → \(Int(rtt))ms\n".utf8))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Resolve a host's org off the main thread, then store it back on the main
|
||||
/// actor. Reverse DNS can block for seconds, so it runs detached.
|
||||
private func resolve(_ host: String) {
|
||||
guard orgForHost[host] == nil, pending.insert(host).inserted else { return }
|
||||
Task {
|
||||
let org = await Task.detached(priority: .utility) {
|
||||
let ptr = ReverseDNS.resolve(host)
|
||||
return OrgClassifier.classify(ip: host, ptr: ptr)
|
||||
}.value
|
||||
orgForHost[host] = org
|
||||
pending.remove(host)
|
||||
if ProcessInfo.processInfo.environment["NC_DEBUG"] != nil {
|
||||
FileHandle.standardError.write(Data("[org] \(host) → \(org.name) (\(org.resolvedHost ?? "no-ptr"))\n".utf8))
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,99 @@
|
||||
import SpriteKit
|
||||
import NetworkCityCore
|
||||
|
||||
/// How a car of light looks for a given traffic class + magnitude.
|
||||
struct CarStyle {
|
||||
let color: SKColor
|
||||
let scale: CGFloat
|
||||
let elongation: CGFloat // 1 = round dot; >1 = streak along motion
|
||||
let speed: CGFloat // points/sec
|
||||
}
|
||||
|
||||
/// Colour per traffic class — direction is read from motion, so hue is free to
|
||||
/// mean protocol.
|
||||
enum TrafficPalette {
|
||||
static func color(_ c: TrafficClass) -> SKColor {
|
||||
switch c {
|
||||
case .dns: return SKColor(red: 1.00, green: 0.82, blue: 0.25, alpha: 1) // gold
|
||||
case .https: return SKColor(red: 0.22, green: 0.88, blue: 1.00, alpha: 1) // cyan
|
||||
case .http: return SKColor(red: 1.00, green: 0.48, blue: 0.24, alpha: 1) // orange
|
||||
case .quic: return SKColor(red: 0.71, green: 0.48, blue: 1.00, alpha: 1) // violet
|
||||
case .other: return SKColor(red: 0.55, green: 0.60, blue: 0.72, alpha: 1) // slate
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Translate a class + this-tick byte volume into a car's personality. Heavy
|
||||
/// flows become "freight": bigger, slower, stretched into a glowing comet.
|
||||
func carStyle(_ cls: TrafficClass, bytes: UInt64) -> CarStyle {
|
||||
let heavy = bytes > 196_608 // ~96 KB/s over a 2s tick
|
||||
var scale: CGFloat
|
||||
var elongation: CGFloat = 1
|
||||
var speed: CGFloat = 230
|
||||
|
||||
switch cls {
|
||||
case .dns: scale = 0.055; speed = 360 // tiny, fast sparks
|
||||
case .https: scale = 0.085
|
||||
case .http: scale = 0.085
|
||||
case .quic: scale = 0.085; elongation = 2.4; speed = 285 // streaks
|
||||
case .other: scale = 0.065
|
||||
}
|
||||
|
||||
if heavy {
|
||||
scale *= 1.7
|
||||
elongation = max(elongation, 3.0) // freight comet
|
||||
speed *= 0.7 // slow and heavy
|
||||
}
|
||||
return CarStyle(color: TrafficPalette.color(cls), scale: scale, elongation: elongation, speed: speed)
|
||||
}
|
||||
|
||||
/// Neon-night palette. Bright, saturated colors on near-black so additive
|
||||
/// blending reads as glow.
|
||||
enum Palette {
|
||||
static let background = SKColor(red: 0.039, green: 0.055, blue: 0.102, alpha: 1) // #0a0e1a
|
||||
static let grid = SKColor(red: 0.13, green: 0.20, blue: 0.38, alpha: 1)
|
||||
static let hub = SKColor(red: 1.00, green: 0.85, blue: 0.62, alpha: 1) // warm downtown
|
||||
static let building = SKColor(red: 0.50, green: 0.82, blue: 0.78, alpha: 1) // teal
|
||||
static let road = SKColor(red: 0.17, green: 0.26, blue: 0.46, alpha: 1)
|
||||
static let download = SKColor(red: 0.22, green: 0.88, blue: 1.00, alpha: 1) // cyan, inbound
|
||||
static let upload = SKColor(red: 1.00, green: 0.62, blue: 0.30, alpha: 1) // amber, outbound
|
||||
}
|
||||
|
||||
extension CGFloat {
|
||||
func clamped(_ lo: CGFloat, _ hi: CGFloat) -> CGFloat { Swift.min(Swift.max(self, lo), hi) }
|
||||
}
|
||||
|
||||
enum Textures {
|
||||
/// A white radial-gradient disc (opaque center → transparent edge). Tint it
|
||||
/// per-node with `colorBlendFactor` + `.add` blend mode to get a glow.
|
||||
// Immutable after creation and only read; safe to share across actors.
|
||||
nonisolated(unsafe) static let softCircle: SKTexture = makeSoftCircle(diameter: 128)
|
||||
|
||||
private static func makeSoftCircle(diameter: Int) -> SKTexture {
|
||||
let space = CGColorSpaceCreateDeviceRGB()
|
||||
let ctx = CGContext(
|
||||
data: nil, width: diameter, height: diameter,
|
||||
bitsPerComponent: 8, bytesPerRow: 0, space: space,
|
||||
bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
|
||||
)!
|
||||
let colors = [
|
||||
SKColor.white.cgColor,
|
||||
SKColor.white.withAlphaComponent(0).cgColor,
|
||||
] as CFArray
|
||||
let gradient = CGGradient(colorsSpace: space, colors: colors, locations: [0, 1])!
|
||||
let center = CGPoint(x: diameter / 2, y: diameter / 2)
|
||||
ctx.drawRadialGradient(
|
||||
gradient, startCenter: center, startRadius: 0,
|
||||
endCenter: center, endRadius: CGFloat(diameter) / 2, options: []
|
||||
)
|
||||
return SKTexture(cgImage: ctx.makeImage()!)
|
||||
}
|
||||
}
|
||||
|
||||
/// Deterministic FNV-1a hash so a given host always lands in the same place,
|
||||
/// independent of Swift's per-process `Hasher` seed.
|
||||
func stableHash(_ s: String) -> UInt64 {
|
||||
var h: UInt64 = 1469598103934665603
|
||||
for byte in s.utf8 { h = (h ^ UInt64(byte)) &* 1099511628211 }
|
||||
return h
|
||||
}
|
||||
@@ -0,0 +1,12 @@
|
||||
import Foundation
|
||||
|
||||
/// The seam between *where the bytes come from* and *the city that renders them*.
|
||||
///
|
||||
/// Phase 1 backs this with `NettopSource`. Phase 2 can swap in a libpcap-based
|
||||
/// source — anything that can emit `ConnectionSnapshot`s — and the renderer is
|
||||
/// none the wiser.
|
||||
public protocol ConnectionSource: Sendable {
|
||||
/// Emits a snapshot roughly every `interval` seconds until the stream is
|
||||
/// cancelled (e.g. the consumer breaks out of its `for await` loop).
|
||||
func snapshots(every interval: TimeInterval) -> AsyncStream<ConnectionSnapshot>
|
||||
}
|
||||
@@ -0,0 +1,99 @@
|
||||
import Foundation
|
||||
|
||||
/// A grouping of destinations under one real-world owner. `key` is the stable
|
||||
/// grouping id (a registrable domain, or a bare IP when unresolved); `name` is
|
||||
/// what the district is labelled.
|
||||
public struct Org: Sendable, Hashable {
|
||||
public let key: String
|
||||
public let name: String
|
||||
public let resolvedHost: String?
|
||||
|
||||
public init(key: String, name: String, resolvedHost: String?) {
|
||||
self.key = key
|
||||
self.name = name
|
||||
self.resolvedHost = resolvedHost
|
||||
}
|
||||
}
|
||||
|
||||
/// Maps a reverse-DNS hostname to an `Org`. Pure and deterministic so it can be
|
||||
/// unit-tested without touching the network.
|
||||
public enum OrgClassifier {
|
||||
|
||||
private struct Rule { let key: String; let name: String; let domains: Set<String> }
|
||||
|
||||
/// Well-known owners whose traffic spreads across many registrable domains.
|
||||
/// Anything matched here collapses to a single district.
|
||||
private static let rules: [Rule] = [
|
||||
Rule(key: "apple", name: "Apple",
|
||||
domains: ["apple.com", "icloud.com", "aaplimg.com", "mzstatic.com", "cdn-apple.com", "apple-dns.net"]),
|
||||
Rule(key: "google", name: "Google",
|
||||
domains: ["google.com", "googleusercontent.com", "gstatic.com", "googleapis.com",
|
||||
"1e100.net", "ggpht.com", "youtube.com", "ytimg.com", "google-analytics.com"]),
|
||||
Rule(key: "amazon", name: "Amazon / AWS",
|
||||
domains: ["amazonaws.com", "amazon.com", "cloudfront.net", "aws.dev", "awsglobalaccelerator.com"]),
|
||||
Rule(key: "microsoft", name: "Microsoft",
|
||||
domains: ["microsoft.com", "windows.com", "windowsupdate.com", "azure.com",
|
||||
"azureedge.net", "office.com", "live.com", "msftncsi.com"]),
|
||||
Rule(key: "meta", name: "Meta",
|
||||
domains: ["facebook.com", "fbcdn.net", "instagram.com", "whatsapp.net", "fb.com"]),
|
||||
Rule(key: "cloudflare", name: "Cloudflare",
|
||||
domains: ["cloudflare.com", "cloudflare-dns.com", "cf-dns.com"]),
|
||||
Rule(key: "akamai", name: "Akamai",
|
||||
domains: ["akamai.net", "akamaiedge.net", "akamaitechnologies.com", "akadns.net"]),
|
||||
Rule(key: "fastly", name: "Fastly",
|
||||
domains: ["fastly.net", "fastlylb.net"]),
|
||||
Rule(key: "github", name: "GitHub",
|
||||
domains: ["github.com", "githubusercontent.com", "githubassets.com"]),
|
||||
Rule(key: "spotify", name: "Spotify",
|
||||
domains: ["spotify.com", "scdn.co", "spotifycdn.com"]),
|
||||
Rule(key: "netflix", name: "Netflix",
|
||||
domains: ["netflix.com", "nflxvideo.net", "nflxso.net", "nflximg.net"]),
|
||||
Rule(key: "telegram", name: "Telegram",
|
||||
domains: ["telegram.org", "t.me", "telegram.me"]),
|
||||
Rule(key: "anthropic", name: "Anthropic",
|
||||
domains: ["anthropic.com", "claude.ai"]),
|
||||
]
|
||||
|
||||
/// Registrable suffixes that span two labels, so the registrable domain is
|
||||
/// the last *three* labels (e.g. `bbc.co.uk`, not `co.uk`).
|
||||
private static let multiPartSuffixes: Set<String> = [
|
||||
"co.uk", "org.uk", "gov.uk", "ac.uk", "co.jp", "co.nz", "co.in",
|
||||
"com.au", "net.au", "org.au", "com.br", "com.cn", "com.mx", "co.kr", "co.za",
|
||||
]
|
||||
|
||||
public static func classify(ip: String, ptr: String?) -> Org {
|
||||
// 1. A PTR with a real registrable domain is the most accurate signal.
|
||||
if let ptr, let reg = registrableDomain(ptr) {
|
||||
if let rule = rules.first(where: { $0.domains.contains(reg) }) {
|
||||
return Org(key: rule.key, name: rule.name, resolvedHost: ptr)
|
||||
}
|
||||
return Org(key: reg, name: prettify(reg), resolvedHost: ptr)
|
||||
}
|
||||
// 2. No usable PTR — fall back to the curated CIDR table (Apple's 17/8,
|
||||
// Telegram, private LAN, …).
|
||||
if let match = IPRanges.match(ip) {
|
||||
return Org(key: match.key, name: match.name, resolvedHost: ptr)
|
||||
}
|
||||
// 3. Unknown: the IP is its own (unlabelled) district.
|
||||
return Org(key: ip, name: ip, resolvedHost: ptr)
|
||||
}
|
||||
|
||||
/// eTLD+1 with a small built-in multi-part-suffix table. `a.b.example.co.uk`
|
||||
/// -> `example.co.uk`; `cdn.gstatic.com` -> `gstatic.com`.
|
||||
public static func registrableDomain(_ host: String) -> String? {
|
||||
let trimmed = host.lowercased().trimmingCharacters(in: CharacterSet(charactersIn: "."))
|
||||
let labels = trimmed.split(separator: ".").map(String.init)
|
||||
guard labels.count >= 2 else { return nil }
|
||||
let lastTwo = labels.suffix(2).joined(separator: ".")
|
||||
if labels.count >= 3 && multiPartSuffixes.contains(lastTwo) {
|
||||
return labels.suffix(3).joined(separator: ".")
|
||||
}
|
||||
return lastTwo
|
||||
}
|
||||
|
||||
/// `example.co.uk` -> `Example`.
|
||||
public static func prettify(_ registrable: String) -> String {
|
||||
guard let sld = registrable.split(separator: ".").first else { return registrable }
|
||||
return sld.prefix(1).uppercased() + sld.dropFirst()
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,60 @@
|
||||
import Foundation
|
||||
|
||||
/// Decides which districts auto-expand into hub-and-spoke each tick.
|
||||
///
|
||||
/// Rules: a district expands only if it has at least two endpoints (a single-IP
|
||||
/// org has nothing to fan out) and ranks among the busiest `topK` above
|
||||
/// `floorBytes`. Once chosen it stays expanded for `ttlTicks` ticks, so a burst
|
||||
/// leaves a smooth tail instead of flickering collapsed the moment it idles.
|
||||
///
|
||||
/// Pure and deterministic given its input — no SpriteKit, fully unit-testable.
|
||||
public final class ExpansionPolicy {
|
||||
public struct District: Sendable {
|
||||
public let key: String
|
||||
public let bytes: UInt64
|
||||
public let endpointCount: Int
|
||||
public init(key: String, bytes: UInt64, endpointCount: Int) {
|
||||
self.key = key
|
||||
self.bytes = bytes
|
||||
self.endpointCount = endpointCount
|
||||
}
|
||||
}
|
||||
|
||||
private let topK: Int
|
||||
private let ttlTicks: Int
|
||||
private let floorBytes: UInt64
|
||||
private var ttl: [String: Int] = [:]
|
||||
|
||||
public init(topK: Int = 4, ttlTicks: Int = 4, floorBytes: UInt64 = 8 * 1024) {
|
||||
self.topK = topK
|
||||
self.ttlTicks = ttlTicks
|
||||
self.floorBytes = floorBytes
|
||||
}
|
||||
|
||||
/// Advance one tick over the full set of currently-known districts (include
|
||||
/// idle ones so their tail can decay). Returns the set of keys to render
|
||||
/// expanded.
|
||||
public func update(_ districts: [District]) -> Set<String> {
|
||||
// Decay every existing timer.
|
||||
for key in ttl.keys { ttl[key] = max(0, (ttl[key] ?? 0) - 1) }
|
||||
|
||||
// Refresh the busiest multi-endpoint districts.
|
||||
var winners = 0
|
||||
for d in districts.sorted(by: { $0.bytes > $1.bytes }) {
|
||||
guard winners < topK else { break }
|
||||
if d.bytes >= floorBytes && d.endpointCount >= 2 {
|
||||
ttl[d.key] = ttlTicks
|
||||
winners += 1
|
||||
}
|
||||
}
|
||||
|
||||
// Expanded = live timer AND still has something to fan out.
|
||||
let endpointCounts = Dictionary(districts.map { ($0.key, $0.endpointCount) },
|
||||
uniquingKeysWith: { a, _ in a })
|
||||
var expanded = Set<String>()
|
||||
for (key, remaining) in ttl where remaining > 0 {
|
||||
if (endpointCounts[key] ?? 0) >= 2 { expanded.insert(key) }
|
||||
}
|
||||
return expanded
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,56 @@
|
||||
import Foundation
|
||||
|
||||
/// A curated CIDR → owner table, used as a fallback when a host has no PTR
|
||||
/// record. Many large operators (Apple's 17.0.0.0/8 famously, Telegram, the
|
||||
/// cloud edges) publish no reverse DNS, so this recovers the obvious ones.
|
||||
/// IPv4 only — the no-PTR giants we care about are reachable on v4.
|
||||
public enum IPRanges {
|
||||
|
||||
private struct Block { let net: UInt32; let mask: UInt32; let key: String; let name: String }
|
||||
|
||||
private static let blocks: [Block] = [
|
||||
("17.0.0.0/8", "apple", "Apple"),
|
||||
("149.154.160.0/20", "telegram", "Telegram"),
|
||||
("91.108.0.0/16", "telegram", "Telegram"),
|
||||
("13.64.0.0/11", "microsoft", "Microsoft"),
|
||||
("157.240.0.0/16", "meta", "Meta"),
|
||||
("31.13.24.0/21", "meta", "Meta"),
|
||||
("129.134.0.0/16", "meta", "Meta"),
|
||||
("1.1.1.0/24", "cloudflare", "Cloudflare"),
|
||||
("104.16.0.0/13", "cloudflare", "Cloudflare"),
|
||||
// Private / link-local space collapses into one neighbourhood.
|
||||
("10.0.0.0/8", "lan", "Local Network"),
|
||||
("172.16.0.0/12", "lan", "Local Network"),
|
||||
("192.168.0.0/16", "lan", "Local Network"),
|
||||
("169.254.0.0/16", "lan", "Local Network"),
|
||||
].compactMap { parse($0.0, key: $0.1, name: $0.2) }
|
||||
|
||||
public static func match(_ ip: String) -> (key: String, name: String)? {
|
||||
guard let value = ipv4ToUInt32(ip) else { return nil }
|
||||
for b in blocks where (value & b.mask) == b.net {
|
||||
return (b.key, b.name)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// MARK: - Parsing
|
||||
|
||||
private static func parse(_ cidr: String, key: String, name: String) -> Block? {
|
||||
let parts = cidr.split(separator: "/")
|
||||
guard parts.count == 2, let bits = UInt32(parts[1]), bits <= 32,
|
||||
let net = ipv4ToUInt32(String(parts[0])) else { return nil }
|
||||
let mask: UInt32 = bits == 0 ? 0 : ~UInt32(0) << (32 - bits)
|
||||
return Block(net: net & mask, mask: mask, key: key, name: name)
|
||||
}
|
||||
|
||||
static func ipv4ToUInt32(_ ip: String) -> UInt32? {
|
||||
let octets = ip.split(separator: ".")
|
||||
guard octets.count == 4 else { return nil }
|
||||
var result: UInt32 = 0
|
||||
for octet in octets {
|
||||
guard let n = UInt32(octet), n <= 255 else { return nil }
|
||||
result = (result << 8) | n
|
||||
}
|
||||
return result
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,17 @@
|
||||
import Foundation
|
||||
import CoreGraphics
|
||||
|
||||
/// Maps a measured round-trip time (ms) to a radial distance from downtown.
|
||||
/// A log curve so the busy near range (1–50ms LAN/CDN) spreads out instead of
|
||||
/// bunching at the center, while the long tail (transcontinental) saturates.
|
||||
public enum LatencyLayout {
|
||||
public static let minRadius: CGFloat = 150
|
||||
public static let maxRadius: CGFloat = 560
|
||||
public static let rttCeiling: Double = 250 // ms mapped to the outer edge
|
||||
|
||||
public static func radius(forRTT rtt: Double) -> CGFloat {
|
||||
let clamped = max(0, min(rtt, rttCeiling))
|
||||
let norm = log10(1 + clamped) / log10(1 + rttCeiling)
|
||||
return minRadius + CGFloat(norm) * (maxRadius - minRadius)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,69 @@
|
||||
import Foundation
|
||||
import Network
|
||||
|
||||
/// Measures round-trip time to an endpoint with an unprivileged TCP connect
|
||||
/// (time from start to `.ready` ≈ one handshake RTT). Results are cached.
|
||||
///
|
||||
/// We probe a port we've already seen traffic on, so we're not knocking on
|
||||
/// closed doors — and the connection carries no data, just the handshake.
|
||||
public actor LatencyProber {
|
||||
private var cache: [String: Double] = [:]
|
||||
|
||||
public init() {}
|
||||
|
||||
public func cached(_ host: String) -> Double? { cache[host] }
|
||||
|
||||
/// Measure (or refresh) RTT in milliseconds. Returns nil if unreachable.
|
||||
public func measure(host: String, port: UInt16) async -> Double? {
|
||||
let rtt = await Self.tcpHandshakeRTT(host: host, port: port)
|
||||
if let rtt { cache[host] = rtt }
|
||||
return rtt
|
||||
}
|
||||
|
||||
private static func tcpHandshakeRTT(host: String, port: UInt16) async -> Double? {
|
||||
guard let nwPort = NWEndpoint.Port(rawValue: port) else { return nil }
|
||||
|
||||
return await withCheckedContinuation { (cont: CheckedContinuation<Double?, Never>) in
|
||||
let conn = NWConnection(host: NWEndpoint.Host(host), port: nwPort, using: .tcp)
|
||||
let queue = DispatchQueue(label: "latency.probe")
|
||||
let start = DispatchTime.now()
|
||||
let state = ProbeState(conn: conn, cont: cont)
|
||||
|
||||
conn.stateUpdateHandler = { st in
|
||||
switch st {
|
||||
case .ready:
|
||||
let ns = DispatchTime.now().uptimeNanoseconds - start.uptimeNanoseconds
|
||||
state.finish(Double(ns) / 1_000_000)
|
||||
case .failed, .cancelled:
|
||||
state.finish(nil)
|
||||
default:
|
||||
break
|
||||
}
|
||||
}
|
||||
conn.start(queue: queue)
|
||||
queue.asyncAfter(deadline: .now() + 2) { state.finish(nil) } // timeout
|
||||
}
|
||||
}
|
||||
|
||||
/// Resumes the continuation exactly once, whichever callback fires first.
|
||||
private final class ProbeState: @unchecked Sendable {
|
||||
private let lock = NSLock()
|
||||
private var done = false
|
||||
private let conn: NWConnection
|
||||
private let cont: CheckedContinuation<Double?, Never>
|
||||
|
||||
init(conn: NWConnection, cont: CheckedContinuation<Double?, Never>) {
|
||||
self.conn = conn
|
||||
self.cont = cont
|
||||
}
|
||||
|
||||
func finish(_ value: Double?) {
|
||||
lock.lock()
|
||||
if done { lock.unlock(); return }
|
||||
done = true
|
||||
lock.unlock()
|
||||
conn.cancel()
|
||||
cont.resume(returning: value)
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,40 @@
|
||||
import Foundation
|
||||
import CoreGraphics
|
||||
|
||||
/// Places district labels so their boxes don't overlap. Each district starts at
|
||||
/// a hash-derived seed; if its (padded) label box collides with an already-placed
|
||||
/// one, we spiral outward — rotating and pushing away from downtown — until we
|
||||
/// find clear space. Existing placements never move, so the map stays stable as
|
||||
/// new districts appear.
|
||||
///
|
||||
/// Pure and deterministic given its inputs; no SpriteKit, fully unit-testable.
|
||||
public enum LayoutSolver {
|
||||
|
||||
/// - Parameters:
|
||||
/// - baseAngle/baseRadius: the hash-derived seed in polar coords.
|
||||
/// - localRect: the label box *relative to the node center* (labels sit
|
||||
/// below the dot, so this is usually offset downward).
|
||||
/// - existing: already-placed label boxes in world space.
|
||||
/// - pad: minimum gap to keep between boxes.
|
||||
/// - Returns: a world-space center for the new district.
|
||||
public static func placeNonOverlapping(
|
||||
baseAngle: Double,
|
||||
baseRadius: Double,
|
||||
localRect: CGRect,
|
||||
existing: [CGRect],
|
||||
pad: CGFloat = 16,
|
||||
maxAttempts: Int = 400
|
||||
) -> CGPoint {
|
||||
for attempt in 0..<maxAttempts {
|
||||
let angle = baseAngle + Double(attempt) * 0.45 // rotate as we go
|
||||
let radius = baseRadius + Double(attempt) * 7 // and push outward
|
||||
let center = CGPoint(x: cos(angle) * radius, y: sin(angle) * radius)
|
||||
let box = localRect.offsetBy(dx: center.x, dy: center.y).insetBy(dx: -pad, dy: -pad)
|
||||
if !existing.contains(where: { $0.intersects(box) }) {
|
||||
return center
|
||||
}
|
||||
}
|
||||
// Give up gracefully at the seed (extremely crowded map).
|
||||
return CGPoint(x: cos(baseAngle) * baseRadius, y: sin(baseAngle) * baseRadius)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,93 @@
|
||||
import Foundation
|
||||
|
||||
/// Transport flavour as reported by `nettop` (the trailing 4/6 is the IP version).
|
||||
public enum NetProtocol: String, Sendable, Hashable {
|
||||
case tcp4, tcp6, udp4, udp6, quic4, quic6, other
|
||||
|
||||
public init(_ raw: String) {
|
||||
self = NetProtocol(rawValue: raw) ?? .other
|
||||
}
|
||||
}
|
||||
|
||||
/// One end of a connection. `port` is nil for a wildcard (`*`) — i.e. a listener.
|
||||
public struct Endpoint: Sendable, Hashable {
|
||||
public let host: String
|
||||
public let port: Int?
|
||||
|
||||
public init(host: String, port: Int?) {
|
||||
self.host = host
|
||||
self.port = port
|
||||
}
|
||||
|
||||
public var isWildcard: Bool { host == "*" || host.isEmpty }
|
||||
|
||||
public var display: String {
|
||||
guard let port else { return host }
|
||||
return "\(host):\(port)"
|
||||
}
|
||||
}
|
||||
|
||||
/// A single connection sampled from `nettop`. Byte counts are cumulative
|
||||
/// (lifetime of the connection), so traffic *rates* come from diffing snapshots.
|
||||
public struct Connection: Sendable, Hashable {
|
||||
public let proto: NetProtocol
|
||||
public let local: Endpoint
|
||||
public let remote: Endpoint
|
||||
public let bytesIn: UInt64
|
||||
public let bytesOut: UInt64
|
||||
public let processName: String
|
||||
public let pid: Int32
|
||||
|
||||
public init(
|
||||
proto: NetProtocol,
|
||||
local: Endpoint,
|
||||
remote: Endpoint,
|
||||
bytesIn: UInt64,
|
||||
bytesOut: UInt64,
|
||||
processName: String,
|
||||
pid: Int32
|
||||
) {
|
||||
self.proto = proto
|
||||
self.local = local
|
||||
self.remote = remote
|
||||
self.bytesIn = bytesIn
|
||||
self.bytesOut = bytesOut
|
||||
self.processName = processName
|
||||
self.pid = pid
|
||||
}
|
||||
|
||||
/// Stable identity for diffing across snapshots (ignores byte counts).
|
||||
public var key: String {
|
||||
"\(proto.rawValue) \(local.display)<->\(remote.display)"
|
||||
}
|
||||
|
||||
/// True when the remote is a real off-box destination — the only kind that
|
||||
/// becomes a "building" in the city. Filters listeners, loopback, link-local.
|
||||
public var isExternal: Bool {
|
||||
let h = remote.host
|
||||
if remote.isWildcard { return false }
|
||||
if h == "::1" || h.hasPrefix("127.") { return false } // loopback
|
||||
if h.hasPrefix("fe80") || h == "::" { return false } // link-local / unspecified
|
||||
return true
|
||||
}
|
||||
|
||||
/// True when the remote is on the local network (a "neighbourhood" district).
|
||||
public var isPrivateLAN: Bool {
|
||||
let h = remote.host
|
||||
return h.hasPrefix("10.")
|
||||
|| h.hasPrefix("192.168.")
|
||||
|| h.hasPrefix("169.254.")
|
||||
|| (h.hasPrefix("172.") && (16...31).contains(Int(h.split(separator: ".").dropFirst().first ?? "") ?? -1))
|
||||
}
|
||||
}
|
||||
|
||||
/// All connections observed at one instant.
|
||||
public struct ConnectionSnapshot: Sendable {
|
||||
public let timestamp: Date
|
||||
public let connections: [Connection]
|
||||
|
||||
public init(timestamp: Date, connections: [Connection]) {
|
||||
self.timestamp = timestamp
|
||||
self.connections = connections
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,111 @@
|
||||
import Foundation
|
||||
|
||||
/// Pure, side-effect-free parsing of `nettop` CSV output. Kept separate from the
|
||||
/// process-spawning so it can be unit-tested against captured fixtures.
|
||||
///
|
||||
/// Expected invocation: `nettop -L 1 -x -n -J time,bytes_in,bytes_out`
|
||||
/// which yields lines like:
|
||||
///
|
||||
/// time,,bytes_in,bytes_out,
|
||||
/// 23:49:56.574,apsd.571,15671580,11326466,
|
||||
/// 23:49:56.573,tcp4 192.168.10.194:57359<->17.57.144.184:5223,15671580,11326466,
|
||||
///
|
||||
/// Process rows carry `Name.PID` in column 2; the connection sub-rows that follow
|
||||
/// inherit that process until the next process row.
|
||||
public enum NettopParser {
|
||||
|
||||
public static func parseConnections(_ raw: String) -> [Connection] {
|
||||
var result: [Connection] = []
|
||||
var currentProcess = "unknown"
|
||||
var currentPID: Int32 = -1
|
||||
|
||||
for rawLine in raw.split(separator: "\n", omittingEmptySubsequences: true) {
|
||||
// Don't omit empty subsequences: byte columns can legitimately be empty.
|
||||
let fields = rawLine.split(separator: ",", omittingEmptySubsequences: false)
|
||||
.map(String.init)
|
||||
guard fields.count >= 2 else { continue }
|
||||
|
||||
let key = fields[1]
|
||||
if key.isEmpty || fields[0] == "time" { continue } // header / blank
|
||||
|
||||
if key.contains("<->") {
|
||||
if let conn = parseConnectionRow(
|
||||
key: key,
|
||||
bytesIn: fields.count > 2 ? fields[2] : "",
|
||||
bytesOut: fields.count > 3 ? fields[3] : "",
|
||||
processName: currentProcess,
|
||||
pid: currentPID
|
||||
) {
|
||||
result.append(conn)
|
||||
}
|
||||
} else if let (name, pid) = parseProcessKey(key) {
|
||||
currentProcess = name
|
||||
currentPID = pid
|
||||
}
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
// MARK: - Rows
|
||||
|
||||
/// `mDNSResponder.647` -> ("mDNSResponder", 647). The suffix after the final
|
||||
/// dot must be all digits, otherwise it's not a process header.
|
||||
static func parseProcessKey(_ key: String) -> (String, Int32)? {
|
||||
guard let dot = key.lastIndex(of: ".") else { return nil }
|
||||
let pidPart = key[key.index(after: dot)...]
|
||||
guard !pidPart.isEmpty, pidPart.allSatisfy(\.isNumber),
|
||||
let pid = Int32(pidPart) else { return nil }
|
||||
return (String(key[key.startIndex..<dot]), pid)
|
||||
}
|
||||
|
||||
/// `tcp4 192.168.10.194:57359<->17.57.144.184:5223` -> Connection
|
||||
static func parseConnectionRow(
|
||||
key: String,
|
||||
bytesIn: String,
|
||||
bytesOut: String,
|
||||
processName: String,
|
||||
pid: Int32
|
||||
) -> Connection? {
|
||||
guard let space = key.firstIndex(of: " ") else { return nil }
|
||||
let protoStr = String(key[key.startIndex..<space])
|
||||
let tuple = String(key[key.index(after: space)...])
|
||||
|
||||
guard let arrow = tuple.range(of: "<->") else { return nil }
|
||||
let localStr = String(tuple[tuple.startIndex..<arrow.lowerBound])
|
||||
let remoteStr = String(tuple[arrow.upperBound...])
|
||||
|
||||
let isV6 = protoStr.hasSuffix("6")
|
||||
return Connection(
|
||||
proto: NetProtocol(protoStr),
|
||||
local: parseEndpoint(localStr, isV6: isV6),
|
||||
remote: parseEndpoint(remoteStr, isV6: isV6),
|
||||
bytesIn: UInt64(bytesIn.trimmingCharacters(in: .whitespaces)) ?? 0,
|
||||
bytesOut: UInt64(bytesOut.trimmingCharacters(in: .whitespaces)) ?? 0,
|
||||
processName: processName,
|
||||
pid: pid
|
||||
)
|
||||
}
|
||||
|
||||
// MARK: - Endpoints
|
||||
|
||||
/// IPv4 separates host/port with `:` (`1.2.3.4:443`); IPv6 uses `.`
|
||||
/// (`::1.8021`) and may carry a `%zone` suffix on the host we strip off.
|
||||
static func parseEndpoint(_ s: String, isV6: Bool) -> Endpoint {
|
||||
let sep: Character = isV6 ? "." : ":"
|
||||
guard let idx = s.lastIndex(of: sep) else {
|
||||
return Endpoint(host: cleanHost(s), port: nil)
|
||||
}
|
||||
let host = cleanHost(String(s[s.startIndex..<idx]))
|
||||
let portStr = String(s[s.index(after: idx)...])
|
||||
let port = portStr == "*" ? nil : Int(portStr)
|
||||
return Endpoint(host: host, port: port)
|
||||
}
|
||||
|
||||
/// Strips an IPv6 scope id: `fe80::1%utun4` -> `fe80::1`.
|
||||
static func cleanHost(_ h: String) -> String {
|
||||
if let pct = h.firstIndex(of: "%") {
|
||||
return String(h[h.startIndex..<pct])
|
||||
}
|
||||
return h
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,57 @@
|
||||
import Foundation
|
||||
|
||||
/// A `ConnectionSource` backed by repeatedly shelling out to `/usr/bin/nettop`.
|
||||
///
|
||||
/// Each tick runs a fresh one-shot `nettop` (`-L 1`). Because byte counts are
|
||||
/// lifetime-cumulative and stable across invocations, the consumer diffs
|
||||
/// successive snapshots to recover per-interval traffic. No elevated privileges
|
||||
/// required — that's the whole point of starting here.
|
||||
public final class NettopSource: ConnectionSource {
|
||||
|
||||
private let nettopPath: String
|
||||
|
||||
public init(nettopPath: String = "/usr/bin/nettop") {
|
||||
self.nettopPath = nettopPath
|
||||
}
|
||||
|
||||
public func snapshots(every interval: TimeInterval) -> AsyncStream<ConnectionSnapshot> {
|
||||
AsyncStream { continuation in
|
||||
let task = Task { [nettopPath] in
|
||||
while !Task.isCancelled {
|
||||
if let output = try? Self.runNettop(at: nettopPath) {
|
||||
let conns = NettopParser.parseConnections(output)
|
||||
continuation.yield(ConnectionSnapshot(timestamp: Date(), connections: conns))
|
||||
}
|
||||
do {
|
||||
try await Task.sleep(nanoseconds: UInt64(interval * 1_000_000_000))
|
||||
} catch {
|
||||
break // cancelled
|
||||
}
|
||||
}
|
||||
continuation.finish()
|
||||
}
|
||||
continuation.onTermination = { _ in task.cancel() }
|
||||
}
|
||||
}
|
||||
|
||||
/// Runs one-shot nettop and returns its stdout. Reads the pipe to EOF *before*
|
||||
/// waiting on exit so large output can't deadlock a full pipe buffer.
|
||||
static func runNettop(at path: String) throws -> String {
|
||||
let process = Process()
|
||||
process.executableURL = URL(fileURLWithPath: path)
|
||||
// -L 1 : one sample then exit -x : raw bytes (no unit suffixes)
|
||||
// -n : numeric (skip DNS; we enrich ourselves)
|
||||
// -J : pick only the columns we parse
|
||||
process.arguments = ["-L", "1", "-x", "-n", "-J", "time,bytes_in,bytes_out"]
|
||||
|
||||
let pipe = Pipe()
|
||||
process.standardOutput = pipe
|
||||
process.standardError = FileHandle.nullDevice
|
||||
|
||||
try process.run()
|
||||
let data = pipe.fileHandleForReading.readDataToEndOfFile()
|
||||
process.waitUntilExit()
|
||||
|
||||
return String(decoding: data, as: UTF8.self)
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,26 @@
|
||||
import Foundation
|
||||
import Darwin
|
||||
|
||||
/// Resolves a pid to its real executable name via `proc_pidpath`, because
|
||||
/// nettop's name column is unreliable (it reported `claude` as `2.1.177`).
|
||||
/// Results are cached; drive from a single thread/actor.
|
||||
public final class ProcessNamer {
|
||||
private var cache: [Int32: String] = [:]
|
||||
|
||||
public init() {}
|
||||
|
||||
public func name(for pid: Int32) -> String? {
|
||||
guard pid > 0 else { return nil }
|
||||
if let hit = cache[pid] { return hit }
|
||||
|
||||
var buffer = [CChar](repeating: 0, count: 4096) // PROC_PIDPATHINFO_MAXSIZE
|
||||
let length = proc_pidpath(pid, &buffer, UInt32(buffer.count))
|
||||
guard length > 0 else { return nil }
|
||||
|
||||
let path = String(cString: buffer)
|
||||
// `/Applications/Google Chrome.app/.../Google Chrome Helper` -> last component
|
||||
let name = (path as NSString).lastPathComponent
|
||||
cache[pid] = name
|
||||
return name
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,46 @@
|
||||
import Foundation
|
||||
import Darwin
|
||||
|
||||
/// Best-effort reverse DNS (IP -> PTR hostname). Blocking — call it off the main
|
||||
/// thread. Returns nil when there's no PTR record (we don't want a numeric echo).
|
||||
public enum ReverseDNS {
|
||||
|
||||
public static func resolve(_ ip: String) -> String? {
|
||||
var storage = sockaddr_storage()
|
||||
var length: socklen_t = 0
|
||||
|
||||
if ip.contains(":") {
|
||||
var sa = sockaddr_in6()
|
||||
sa.sin6_family = sa_family_t(AF_INET6)
|
||||
sa.sin6_len = UInt8(MemoryLayout<sockaddr_in6>.size)
|
||||
guard inet_pton(AF_INET6, ip, &sa.sin6_addr) == 1 else { return nil }
|
||||
withUnsafeBytes(of: &sa) { src in
|
||||
withUnsafeMutableBytes(of: &storage) { dst in
|
||||
dst.copyMemory(from: UnsafeRawBufferPointer(rebasing: src[0..<MemoryLayout<sockaddr_in6>.size]))
|
||||
}
|
||||
}
|
||||
length = socklen_t(MemoryLayout<sockaddr_in6>.size)
|
||||
} else {
|
||||
var sa = sockaddr_in()
|
||||
sa.sin_family = sa_family_t(AF_INET)
|
||||
sa.sin_len = UInt8(MemoryLayout<sockaddr_in>.size)
|
||||
guard inet_pton(AF_INET, ip, &sa.sin_addr) == 1 else { return nil }
|
||||
withUnsafeBytes(of: &sa) { src in
|
||||
withUnsafeMutableBytes(of: &storage) { dst in
|
||||
dst.copyMemory(from: UnsafeRawBufferPointer(rebasing: src[0..<MemoryLayout<sockaddr_in>.size]))
|
||||
}
|
||||
}
|
||||
length = socklen_t(MemoryLayout<sockaddr_in>.size)
|
||||
}
|
||||
|
||||
var host = [CChar](repeating: 0, count: Int(NI_MAXHOST))
|
||||
let result = withUnsafePointer(to: &storage) { ptr in
|
||||
ptr.withMemoryRebound(to: sockaddr.self, capacity: 1) { sa in
|
||||
getnameinfo(sa, length, &host, socklen_t(host.count), nil, 0, NI_NAMEREQD)
|
||||
}
|
||||
}
|
||||
guard result == 0 else { return nil }
|
||||
let name = String(cString: host)
|
||||
return name.isEmpty ? nil : name
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,40 @@
|
||||
import Foundation
|
||||
|
||||
/// A coarse traffic category derived from protocol + port, used to colour the
|
||||
/// cars of light. Direction (in/out) is conveyed by motion, so colour is free
|
||||
/// to mean "what kind of traffic is this".
|
||||
public enum TrafficClass: String, Sendable, CaseIterable {
|
||||
case dns
|
||||
case https
|
||||
case http
|
||||
case quic
|
||||
case other
|
||||
|
||||
/// Human label for the legend.
|
||||
public var label: String {
|
||||
switch self {
|
||||
case .dns: return "DNS"
|
||||
case .https: return "HTTPS"
|
||||
case .http: return "HTTP"
|
||||
case .quic: return "QUIC"
|
||||
case .other: return "Other"
|
||||
}
|
||||
}
|
||||
|
||||
public static func classify(proto: NetProtocol, port: Int?) -> TrafficClass {
|
||||
// nettop labels QUIC explicitly; trust that first.
|
||||
if proto == .quic4 || proto == .quic6 { return .quic }
|
||||
|
||||
let isUDP = (proto == .udp4 || proto == .udp6)
|
||||
switch port {
|
||||
case 53, 5353:
|
||||
return .dns
|
||||
case 443:
|
||||
return isUDP ? .quic : .https // UDP/443 is almost always QUIC
|
||||
case 80, 8080:
|
||||
return .http
|
||||
default:
|
||||
return .other
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,48 @@
|
||||
import Foundation
|
||||
|
||||
/// One connection's traffic over the interval between two snapshots.
|
||||
public struct TrafficDelta: Sendable {
|
||||
public let connection: Connection
|
||||
public let bytesInDelta: UInt64
|
||||
public let bytesOutDelta: UInt64
|
||||
public let interval: TimeInterval
|
||||
|
||||
public var inBytesPerSec: Double { interval > 0 ? Double(bytesInDelta) / interval : 0 }
|
||||
public var outBytesPerSec: Double { interval > 0 ? Double(bytesOutDelta) / interval : 0 }
|
||||
}
|
||||
|
||||
/// Turns the stream of cumulative-byte snapshots into per-interval deltas by
|
||||
/// remembering the previous reading for each connection key. Shared by the CLI
|
||||
/// probe and the SpriteKit city so there's one source of truth for "traffic".
|
||||
///
|
||||
/// Not thread-safe by design — drive it from a single actor/thread.
|
||||
public final class TrafficDiffer {
|
||||
private var previous: [String: (UInt64, UInt64)] = [:]
|
||||
private var lastTimestamp: Date?
|
||||
|
||||
public init() {}
|
||||
|
||||
public func ingest(_ snapshot: ConnectionSnapshot) -> [TrafficDelta] {
|
||||
let interval = lastTimestamp.map { snapshot.timestamp.timeIntervalSince($0) } ?? 0
|
||||
lastTimestamp = snapshot.timestamp
|
||||
|
||||
var next: [String: (UInt64, UInt64)] = [:]
|
||||
var deltas: [TrafficDelta] = []
|
||||
|
||||
for c in snapshot.connections {
|
||||
next[c.key] = (c.bytesIn, c.bytesOut)
|
||||
guard interval > 0, let (pIn, pOut) = previous[c.key] else { continue }
|
||||
// A drop in the counter means the tuple was reused by a new connection;
|
||||
// treat as zero rather than underflow.
|
||||
let dIn = c.bytesIn >= pIn ? c.bytesIn - pIn : 0
|
||||
let dOut = c.bytesOut >= pOut ? c.bytesOut - pOut : 0
|
||||
if dIn + dOut > 0 {
|
||||
deltas.append(TrafficDelta(
|
||||
connection: c, bytesInDelta: dIn, bytesOutDelta: dOut, interval: interval
|
||||
))
|
||||
}
|
||||
}
|
||||
previous = next
|
||||
return deltas
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,45 @@
|
||||
import Foundation
|
||||
import NetworkCityCore
|
||||
|
||||
// Phase-1 proof of concept. Polls nettop, diffs successive snapshots, and prints
|
||||
// the busiest external flows as live KB/s — i.e. the raw material that will
|
||||
// become cars driving to buildings.
|
||||
|
||||
setvbuf(stdout, nil, _IONBF, 0) // unbuffered: see output live even when piped
|
||||
|
||||
let interval: TimeInterval = 2.0
|
||||
let source = NettopSource()
|
||||
let differ = TrafficDiffer()
|
||||
var warmedUp = false
|
||||
|
||||
func pad(_ s: String, _ width: Int) -> String {
|
||||
s.count >= width ? String(s.prefix(width)) : s + String(repeating: " ", count: width - s.count)
|
||||
}
|
||||
|
||||
print("📡 NetworkCity probe — sampling every \(Int(interval))s. Ctrl-C to stop.\n")
|
||||
|
||||
for await snap in source.snapshots(every: interval) {
|
||||
let deltas = differ.ingest(snap).filter { $0.connection.isExternal }
|
||||
let external = snap.connections.filter(\.isExternal).count
|
||||
|
||||
if !warmedUp {
|
||||
warmedUp = true
|
||||
print("… warming up (need two samples to compute rates) …\n")
|
||||
continue
|
||||
}
|
||||
|
||||
let active = deltas.sorted { ($0.inBytesPerSec + $0.outBytesPerSec) > ($1.inBytesPerSec + $1.outBytesPerSec) }
|
||||
let ts = DateFormatter.localizedString(from: snap.timestamp, dateStyle: .none, timeStyle: .medium)
|
||||
|
||||
print("─── \(ts) \(active.count) active / \(external) external connections ───")
|
||||
print("\(pad("PROCESS", 18)) \(pad("DESTINATION", 24)) ↓ KB/s ↑ KB/s")
|
||||
if active.isEmpty {
|
||||
print(" (quiet — no measurable traffic this interval)")
|
||||
}
|
||||
for d in active.prefix(15) {
|
||||
let dest = d.connection.remote.display
|
||||
print("\(pad(d.connection.processName, 18)) \(pad(dest, 24)) "
|
||||
+ "\(String(format: "%9.1f", d.inBytesPerSec / 1024)) \(String(format: "%9.1f", d.outBytesPerSec / 1024))")
|
||||
}
|
||||
print("")
|
||||
}
|
||||
Reference in New Issue
Block a user