added client and server, can send text messages :yay:

(maybe we can have chat 😭)
fix client being server

Scream.xcodeproj/project.pbxproj

@@ -7,8 +7,9 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		A909CC142F50FFDA00D98D39 /* UDPServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = A909CC132F50FFDA00D98D39 /* UDPServer.swift */; };
 		A94E29F72F09B569006E583D /* ScreamPacket.swift in Sources */ = {isa = PBXBuildFile; fileRef = A94E29F62F09B569006E583D /* ScreamPacket.swift */; };
-		A98010132F50D19D00A58EF7 /* UDPServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = A98010122F50D19D00A58EF7 /* UDPServer.swift */; };
+		A98010132F50D19D00A58EF7 /* UDPClient.swift in Sources */ = {isa = PBXBuildFile; fileRef = A98010122F50D19D00A58EF7 /* UDPClient.swift */; };
 		A98010152F50D9B100A58EF7 /* CaptureVideoPreview.swift in Sources */ = {isa = PBXBuildFile; fileRef = A98010142F50D9B100A58EF7 /* CaptureVideoPreview.swift */; };
 		A98E8BF02F05B2A0006D4458 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = A98E8BEB2F05B2A0006D4458 /* AppDelegate.swift */; };
 		A98E8BF12F05B2A0006D4458 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = A98E8BEC2F05B2A0006D4458 /* Assets.xcassets */; };
@@ -39,8 +40,9 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
+		A909CC132F50FFDA00D98D39 /* UDPServer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UDPServer.swift; sourceTree = "<group>"; };
 		A94E29F62F09B569006E583D /* ScreamPacket.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScreamPacket.swift; sourceTree = "<group>"; };
-		A98010122F50D19D00A58EF7 /* UDPServer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UDPServer.swift; sourceTree = "<group>"; };
+		A98010122F50D19D00A58EF7 /* UDPClient.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UDPClient.swift; sourceTree = "<group>"; };
 		A98010142F50D9B100A58EF7 /* CaptureVideoPreview.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CaptureVideoPreview.swift; sourceTree = "<group>"; };
 		A98E8BC02F05B26B006D4458 /* Scream.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Scream.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		A98E8BCE2F05B26D006D4458 /* ScreamTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = ScreamTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -127,7 +129,8 @@
 			children = (
 				A98E8BEB2F05B2A0006D4458 /* AppDelegate.swift */,
 				A98E8BFC2F05D28D006D4458 /* ScreenRecorder.swift */,
-				A98010122F50D19D00A58EF7 /* UDPServer.swift */,
+				A98010122F50D19D00A58EF7 /* UDPClient.swift */,
+				A909CC132F50FFDA00D98D39 /* UDPServer.swift */,
 				A9D7225E2F070FE600050BB0 /* CaptureEngine.swift */,
 				A94E29F62F09B569006E583D /* ScreamPacket.swift */,
 				A98010162F50DD4600A58EF7 /* Views */,
@@ -290,11 +293,12 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				A909CC142F50FFDA00D98D39 /* UDPServer.swift in Sources */,
 				A94E29F72F09B569006E583D /* ScreamPacket.swift in Sources */,
 				A98E8BF02F05B2A0006D4458 /* AppDelegate.swift in Sources */,
 				A9D7225F2F070FE600050BB0 /* CaptureEngine.swift in Sources */,
 				A98E8BFD2F05D28D006D4458 /* ScreenRecorder.swift in Sources */,
-				A98010132F50D19D00A58EF7 /* UDPServer.swift in Sources */,
+				A98010132F50D19D00A58EF7 /* UDPClient.swift in Sources */,
 				A98010152F50D9B100A58EF7 /* CaptureVideoPreview.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;

Scream/AppDelegate.swift

@@ -10,7 +10,8 @@ import Cocoa
 @main
 class AppDelegate: NSObject, NSApplicationDelegate {
 	let sr = ScreenRecorder()
-	let udpserver = UDPServerImplementation(port: 03067)
+	let udpclient = UDPClientImplementation(port: 03067)
+	let udpserver = UDPServerImplementation(host: "localhost", port: 03067, initialMessage: "kys")
 
 	@IBOutlet var window: NSWindow!
 
@@ -20,6 +21,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
 		}
 	}
 	@IBAction func Button2(_ sender: Any) {
+		udpclient.start()
 		udpserver.start()
 	}
 	

Scream/UDPClient.swift

@@ -0,0 +1,62 @@
+//
+//  UDPClient.swift
+//  Scream
+//
+//  Created by neon443 on 26/02/2026.
+//
+
+import Foundation
+import Network
+
+final class UDPClientImplementation: Sendable {
+	private let connectionListener: NWListener
+	
+	//init a udp client at x port
+	init(port: UInt16) {
+		connectionListener = try! NWListener(
+			using: .udp,
+			on: NWEndpoint.Port(integerLiteral: port)
+		)
+		
+		connectionListener.newConnectionHandler = { [weak self] connection in
+			connection.start(queue: .global())
+			self?.receive(on: connection)
+		}
+		
+		connectionListener.stateUpdateHandler = { state in
+			print("state: \(state)")
+		}
+	}
+}
+
+protocol UDPClient {
+	func start()
+	func stop()
+}
+
+extension UDPClientImplementation: UDPClient {
+	func start() {
+		connectionListener.start(queue: .global())
+		print("client started")
+	}
+	
+	func stop() {
+		connectionListener.cancel()
+		print("client stoped")
+	}
+}
+
+private extension UDPClientImplementation {
+	func receive(on connection: NWConnection) {
+		connection.receiveMessage { data, contentContext, isComplete, error in
+			if let error {
+				print("error \(error)")
+			}
+			
+			if let data, 
+			   let message = String(data: data, encoding: .utf8) {
+				print(message)
+			}
+		}
+	}
+}

Scream/UDPServer.swift

@@ -8,55 +8,53 @@
 import Foundation
 import Network
 
-final class UDPServerImplementation: Sendable {
-	private let connectionListener: NWListener
-	
-	//init a udp server at x port
-	init(port: UInt16) {
-		connectionListener = try! NWListener(
-			using: .udp,
-			on: NWEndpoint.Port(integerLiteral: port)
-		)
-		
-		connectionListener.newConnectionHandler = { [weak self] connection in
-			connection.start(queue: .global())
-			self?.receive(on: connection)
-		}
-		
-		connectionListener.stateUpdateHandler = { state in
-			print("state: \(state)")
-		}
-	}
-}
-
 protocol UDPServer {
 	func start()
 	func stop()
+	func send(message: String)
+}
+
+final class UDPServerImplementation: Sendable {
+	private let connection: NWConnection
+	
+	init(host: String, port: UInt16, initialMessage: String) {
+		connection = NWConnection(
+			host: NWEndpoint.Host(host),
+			port: NWEndpoint.Port(integerLiteral: port),
+			using: .udp
+		)
+		connection.stateUpdateHandler = { [weak self] state in
+			print("server state is \(state)")
+			if state == .ready {
+				self?.send(message: initialMessage)
+			}
+		}
+	}
 }
 
 extension UDPServerImplementation: UDPServer {
 	func start() {
-		connectionListener.start(queue: .global())
+		connection.start(queue: .global())
-		print("server started")
+		print("server startedf")
 	}
 	
 	func stop() {
-		connectionListener.cancel()
+		connection.cancel()
-		print("server stoped")
+		print("server stopped")
 	}
-}
 	
-private extension UDPServerImplementation {
+	func send(message: String) {
-	func receive(on connection: NWConnection) {
+		guard let data = message.data(using: .utf8) else {
-		connection.receiveMessage { data, contentContext, isComplete, error in
+			print("server: encode message failed")
-			if let error {
+			return
-				print("error \(error)")
-			}
-			
-			if let data, 
-			   let message = String(data: data, encoding: .utf8) {
-				print(message)
-			}
 		}
+		
+		connection.send(content: data, completion: .contentProcessed({ error in
+			if let error {
+				print("server: failed to send \(error)")
+			} else {
+				print("server: message sent")
+			}
+		}))
 	}
 }