Merge branch 'use-encrypted-dns-proxy-code-in-mullvad-ios-ios-818'

1 files changed, 61 insertions, 0 deletions

diff --git a/ios/MullvadRustRuntime/EncryptedDNSProxy.swift b/ios/MullvadRustRuntime/EncryptedDNSProxy.swift
new file mode 100644
index 0000000000..690e2459d0
--- /dev/null
+++ b/ios/MullvadRustRuntime/EncryptedDNSProxy.swift
@@ -0,0 +1,61 @@
+//
+//  EncryptedDNSProxy.swift
+//  MullvadRustRuntime
+//
+//  Created by Emils on 24/09/2024.
+//  Copyright © 2024 Mullvad VPN AB. All rights reserved.
+//
+
+import Foundation
+import MullvadRustRuntimeProxy
+
+enum EncryptedDnsProxyError: Error {
+    case start(err: Int32)
+}
+
+public class EncryptedDNSProxy {
+    private var proxyConfig: ProxyHandle
+    private var stateLock = NSLock()
+    private var didStart = false
+    private let state: OpaquePointer
+
+    public init() {
+        state = encrypted_dns_proxy_init()
+        proxyConfig = ProxyHandle(context: nil, port: 0)
+    }
+
+    public func localPort() -> UInt16 {
+        stateLock.lock()
+        defer { stateLock.unlock() }
+        return proxyConfig.port
+    }
+
+    public func start() throws {
+        stateLock.lock()
+        defer { stateLock.unlock() }
+        guard didStart == false else { return }
+
+        let err = encrypted_dns_proxy_start(state, &proxyConfig)
+        if err != 0 {
+            throw EncryptedDnsProxyError.start(err: err)
+        }
+        didStart = true
+    }
+
+    public func stop() {
+        stateLock.lock()
+        defer { stateLock.unlock() }
+        guard didStart == true else { return }
+        didStart = false
+
+        encrypted_dns_proxy_stop(&proxyConfig)
+    }
+
+    deinit {
+        if didStart {
+            encrypted_dns_proxy_stop(&proxyConfig)
+        }
+
+        encrypted_dns_proxy_free(state)
+    }
+}