Merge pull request #100 from gertrude-app/ios-app

iosapp/.gitignore

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+lib-ios/.build
+/Packages
+xcuserdata/
+DerivedData/
+**/.swiftpm
+*.pbxuser

iosapp/controller/FilterControlProvider.swift

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+import NetworkExtension
+import os.log
+
+class FilterControlProvider: NEFilterControlProvider {
+
+  override func startFilter(completionHandler: @escaping (Error?) -> Void) {
+    os_log("[G•] start filter (control)")
+    completionHandler(nil)
+  }
+
+  override func stopFilter(
+    with reason: NEProviderStopReason,
+    completionHandler: @escaping () -> Void
+  ) {
+    os_log("[G•] stop filter (control) reason: %{public}s", String(describing: reason))
+    completionHandler()
+  }
+
+  override func handleNewFlow(
+    _ flow: NEFilterFlow,
+    completionHandler: @escaping (NEFilterControlVerdict) -> Void
+  ) {
+    completionHandler(.allow(withUpdateRules: false))
+  }
+}

iosapp/controller/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.networkextension.filter-control</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).FilterControlProvider</string>
+	</dict>
+</dict>
+</plist>

iosapp/controller/controller.entitlements

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>com.apple.developer.networking.networkextension</key>
+  <array>
+    <string>content-filter-provider</string>
+  </array>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.com.gertrude-skunk.ios-poc</string>
+	</array>
+</dict>
+</plist>

iosapp/filter/FilterDataProvider.swift

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+import Filter
+import NetworkExtension
+import os.log
+
+class FilterDataProvider: NEFilterDataProvider {
+  override func startFilter(completionHandler: @escaping (Error?) -> Void) {
+    os_log("[G•] start filter (data)")
+    completionHandler(nil)
+  }
+
+  override func stopFilter(
+    with reason: NEProviderStopReason,
+    completionHandler: @escaping () -> Void
+  ) {
+    os_log("[G•] stop filter (data) reason: %{public}s", String(describing: reason))
+    completionHandler()
+  }
+
+  override func handleNewFlow(_ flow: NEFilterFlow) -> NEFilterNewFlowVerdict {
+    var hostname: String?
+    var url: String?
+    let sourceId: String? = flow.sourceAppIdentifier
+    if let browserFlow = flow as? NEFilterBrowserFlow {
+      url = browserFlow.url?.absoluteString
+      os_log("[G•] handle new BROWSER flow (data) : %{public}s", String(describing: browserFlow))
+    } else if let socketFlow = flow as? NEFilterSocketFlow {
+      hostname = socketFlow.remoteHostname
+      os_log("[G•] handle new SOCKET flow (data) : %{public}s", String(describing: socketFlow))
+    } else {
+      os_log(
+        "[G•] flow is NEITHER subclass (unreachable?) id: %{public}s",
+        String(describing: flow.identifier)
+      )
+    }
+    let shouldAllow = decideFlow(hostname: hostname, url: url, sourceId: sourceId)
+    os_log(
+      "[G•] decision: %{public}s, hostname: %{public}s, url: %{public}s, sourceId: %{public}s",
+      shouldAllow ? "ALLOW" : "DROP",
+      hostname ?? "(nil)",
+      url ?? "(nil)",
+      sourceId ?? "(nil)"
+    )
+    return shouldAllow ? .allow() : .drop()
+  }
+}

iosapp/filter/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.networkextension.filter-data</string>
+		<key>NSExtensionPrincipalClass</key>
+		<string>$(PRODUCT_MODULE_NAME).FilterDataProvider</string>
+	</dict>
+</dict>
+</plist>

iosapp/filter/filter.entitlements

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>com.apple.developer.networking.networkextension</key>
+  <array>
+    <string>content-filter-provider</string>
+  </array>
+	<key>com.apple.security.application-groups</key>
+	<array>
+		<string>group.com.gertrude-skunk.ios-poc</string>
+	</array>
+</dict>
+</plist>