From 7a7ce847788f9189027a06cfd4e12efbd99f8bee Mon Sep 17 00:00:00 2001
From: Sudo-Ivan <ivan@ivanryan.dev>
Date: Mon, 30 Dec 2024 12:58:43 -0600
Subject: [PATCH] 0.2.8

---
 cmd/client-ftp/main.go      | 266 ++++++++++++++++++++++++++++++++++
 cmd/client/client.go        | 282 +++++++++++++++++++++++++++++-------
 cmd/reticulum/main.go       |  33 ++++-
 configs/test-client1.toml   |   8 +-
 configs/test-client2.toml   |   8 +-
 internal/config/config.go   |   2 +-
 pkg/announce/announce.go    |  36 ++++-
 pkg/common/config.go        |  23 +--
 pkg/identity/identity.go    |  40 +++--
 pkg/interfaces/interface.go |  34 ++++-
 pkg/interfaces/tcp.go       | 168 ++++++++++++---------
 pkg/interfaces/udp.go       |  99 +++++++++----
 pkg/transport/transport.go  |  41 +++++-
 scripts/run_clients.sh      |  86 +++++++++--
 14 files changed, 919 insertions(+), 207 deletions(-)
 create mode 100644 cmd/client-ftp/main.go

diff --git a/cmd/client-ftp/main.go b/cmd/client-ftp/main.go
new file mode 100644
index 0000000..4afb41c
--- /dev/null
+++ b/cmd/client-ftp/main.go
@@ -0,0 +1,266 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"github.com/Sudo-Ivan/reticulum-go/internal/config"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/common"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/destination"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/identity"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/link"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/packet"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/resource"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/transport"
+)
+
+const (
+	APP_NAME   = "example_utilities"
+	APP_ASPECT = "filetransfer"
+)
+
+var (
+	configPath = flag.String("config", "", "Path to config file")
+	servePath  = flag.String("serve", "", "Directory to serve files from")
+)
+
+type FileServer struct {
+	config     *common.ReticulumConfig
+	transport  *transport.Transport
+	interfaces []common.NetworkInterface
+	identity   *identity.Identity
+	servePath  string
+}
+
+func NewFileServer(cfg *common.ReticulumConfig, servePath string) (*FileServer, error) {
+	if cfg == nil {
+		var err error
+		cfg, err = config.InitConfig()
+		if err != nil {
+			return nil, fmt.Errorf("failed to initialize config: %v", err)
+		}
+	}
+
+	t, err := transport.NewTransport(cfg)
+	if err != nil {
+		return nil, fmt.Errorf("failed to initialize transport: %v", err)
+	}
+
+	id, err := identity.New()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create identity: %v", err)
+	}
+
+	return &FileServer{
+		config:     cfg,
+		transport:  t,
+		interfaces: make([]common.NetworkInterface, 0),
+		identity:   id,
+		servePath:  servePath,
+	}, nil
+}
+
+func (s *FileServer) OnLinkEstablished(l *link.Link) {
+	s.handleLinkEstablished(l)
+}
+
+func (s *FileServer) Start() error {
+	dest, err := destination.New(
+		s.identity,
+		destination.OUT,
+		destination.SINGLE,
+		APP_NAME,
+		APP_ASPECT,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create destination: %v", err)
+	}
+
+	callback := func(l interface{}) {
+		if link, ok := l.(*link.Link); ok {
+			s.OnLinkEstablished(link)
+		}
+	}
+
+	dest.SetLinkEstablishedCallback(callback)
+
+	log.Printf("File server started. Server hash: %s", s.identity.Hex())
+	log.Printf("Serving directory: %s", s.servePath)
+	return nil
+}
+
+func (s *FileServer) handleLinkEstablished(l *link.Link) {
+	log.Printf("Client connected")
+
+	l.SetPacketCallback(func(data []byte, p *packet.Packet) {
+		s.handlePacket(data, l)
+	})
+
+	l.SetResourceCallback(func(r interface{}) bool {
+		if res, ok := r.(*resource.Resource); ok {
+			return s.handleResource(res)
+		}
+		return false
+	})
+}
+
+func (s *FileServer) handlePacket(data []byte, l *link.Link) {
+	if string(data) == "LIST" {
+		files, err := s.getFileList()
+		if err != nil {
+			log.Printf("Error getting file list: %v", err)
+			l.Teardown()
+			return
+		}
+
+		if err := l.SendPacket(files); err != nil {
+			log.Printf("Error sending file list: %v", err)
+			l.Teardown()
+		}
+	}
+}
+
+func (s *FileServer) handleResource(r *resource.Resource) bool {
+	filename := filepath.Join(s.servePath, r.GetName())
+	file, err := os.Create(filename)
+	if err != nil {
+		log.Printf("Failed to create file: %v", err)
+		return false
+	}
+	defer file.Close()
+
+	written, err := io.Copy(file, r)
+	if err != nil {
+		log.Printf("Failed to write file: %v", err)
+		return false
+	}
+
+	log.Printf("Received file: %s (%d bytes)", filename, written)
+	return true
+}
+
+func (s *FileServer) getFileList() ([]byte, error) {
+	files, err := os.ReadDir(s.servePath)
+	if err != nil {
+		return nil, err
+	}
+
+	var fileList []string
+	for _, file := range files {
+		if !file.IsDir() {
+			fileList = append(fileList, file.Name())
+		}
+	}
+
+	return []byte(fmt.Sprintf("%v", fileList)), nil
+}
+
+func main() {
+	flag.Parse()
+
+	if *servePath == "" {
+		log.Fatal("Please specify a directory to serve with -serve")
+	}
+
+	var cfg *common.ReticulumConfig
+	var err error
+
+	if *configPath == "" {
+		cfg, err = config.InitConfig()
+	} else {
+		cfg, err = config.LoadConfig(*configPath)
+	}
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
+	}
+
+	server, err := NewFileServer(cfg, *servePath)
+	if err != nil {
+		log.Fatalf("Failed to create server: %v", err)
+	}
+
+	if err := server.Start(); err != nil {
+		log.Fatalf("Failed to start server: %v", err)
+	}
+
+	// Start watching the directory for changes
+	go server.watchDirectory()
+
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+	<-sigChan
+}
+
+func (s *FileServer) watchDirectory() {
+	for {
+		time.Sleep(1 * time.Second)
+		files, err := os.ReadDir(s.servePath)
+		if err != nil {
+			log.Printf("Error reading directory: %v", err)
+			continue
+		}
+
+		for _, file := range files {
+			if !file.IsDir() {
+				// Try to send file to connected peers
+				filePath := filepath.Join(s.servePath, file.Name())
+				if err := s.sendFile(filePath); err != nil {
+					log.Printf("Error sending file %s: %v", file.Name(), err)
+				}
+			}
+		}
+	}
+}
+
+func (s *FileServer) sendFile(filePath string) error {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return fmt.Errorf("failed to open file: %v", err)
+	}
+	defer file.Close()
+
+	// Create a destination for the file transfer
+	dest, err := destination.New(
+		s.identity,
+		destination.OUT,
+		destination.SINGLE,
+		APP_NAME,
+		APP_ASPECT,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create destination: %v", err)
+	}
+
+	// Set up link for file transfer
+	callback := func(l interface{}) {
+		if link, ok := l.(*link.Link); ok {
+			// Create a new resource with auto-compression enabled
+			res, err := resource.New(file, true)
+			if err != nil {
+				log.Printf("Error creating resource: %v", err)
+				return
+			}
+
+			// The filename is automatically set from the file handle
+			// in resource.New when using an io.ReadWriteSeeker
+
+			// Send the resource through the link
+			if err := link.SendResource(res); err != nil {
+				log.Printf("Error sending resource: %v", err)
+				return
+			}
+			log.Printf("File %s sent successfully", filepath.Base(filePath))
+		}
+	}
+
+	dest.SetLinkEstablishedCallback(callback)
+
+	return nil
+}
diff --git a/cmd/client/client.go b/cmd/client/client.go
index d636b48..9e62100 100644
--- a/cmd/client/client.go
+++ b/cmd/client/client.go
@@ -5,6 +5,7 @@ import (
 	"encoding/binary"
 	"flag"
 	"fmt"
+	"io"
 	"log"
 	"os"
 	"os/signal"
@@ -64,53 +65,90 @@ func NewClient(cfg *common.ReticulumConfig) (*Client, error) {
 }
 
 func (c *Client) Start() error {
-	// Initialize interfaces
-	for _, ifaceConfig := range c.config.Interfaces {
+	log.Printf("Starting Reticulum client...")
+	log.Printf("Configuration: %+v", c.config)
+
+	// Initialize transport
+	t, err := transport.NewTransport(c.config)
+	if err != nil {
+		return fmt.Errorf("failed to initialize transport: %v", err)
+	}
+	c.transport = t
+	log.Printf("Transport initialized")
+
+	log.Printf("Initializing network interfaces...")
+	for name, ifaceConfig := range c.config.Interfaces {
+		if !ifaceConfig.Enabled {
+			log.Printf("Skipping disabled interface %s", name)
+			continue
+		}
+
+		log.Printf("Configuring interface %s (%s)", name, ifaceConfig.Type)
 		var iface common.NetworkInterface
 
 		switch ifaceConfig.Type {
 		case "TCPClientInterface":
+			log.Printf("Connecting to %s:%d via TCP...", ifaceConfig.TargetHost, ifaceConfig.TargetPort)
 			client, err := interfaces.NewTCPClient(
-				ifaceConfig.Name,
+				name,
 				ifaceConfig.TargetHost,
 				ifaceConfig.TargetPort,
 				ifaceConfig.KISSFraming,
 				ifaceConfig.I2PTunneled,
+				ifaceConfig.Enabled,
 			)
 			if err != nil {
-				return fmt.Errorf("failed to create TCP interface %s: %v", ifaceConfig.Name, err)
+				return fmt.Errorf("failed to create TCP interface %s: %v", name, err)
 			}
+
+			if err := client.Start(); err != nil {
+				return fmt.Errorf("failed to start TCP interface %s: %v", name, err)
+			}
+
 			iface = client
+			log.Printf("Successfully connected to %s:%d", ifaceConfig.TargetHost, ifaceConfig.TargetPort)
 
 		case "UDPInterface":
 			addr := fmt.Sprintf("%s:%d", ifaceConfig.Address, ifaceConfig.Port)
+			target := fmt.Sprintf("%s:%d", ifaceConfig.TargetHost, ifaceConfig.TargetPort)
+			log.Printf("Starting UDP interface on %s...", addr)
 			udp, err := interfaces.NewUDPInterface(
-				ifaceConfig.Name,
+				name,
 				addr,
-				"", // No target address for client initially
+				target,
+				ifaceConfig.Enabled,
 			)
 			if err != nil {
-				return fmt.Errorf("failed to create UDP interface %s: %v", ifaceConfig.Name, err)
+				return fmt.Errorf("failed to create UDP interface %s: %v", name, err)
 			}
-			iface = udp
 
-		default:
-			return fmt.Errorf("unsupported interface type: %s", ifaceConfig.Type)
+			if err := udp.Start(); err != nil {
+				return fmt.Errorf("failed to start UDP interface %s: %v", name, err)
+			}
+
+			iface = udp
+			log.Printf("UDP interface listening on %s", addr)
 		}
 
-		c.interfaces = append(c.interfaces, iface)
-		log.Printf("Created interface %s", iface.GetName())
+		if iface != nil {
+			// Set packet callback
+			iface.SetPacketCallback(c.transport.HandlePacket)
+			c.interfaces = append(c.interfaces, iface)
+			log.Printf("Created and started interface %s (type=%v, enabled=%v)",
+				name, iface.GetType(), iface.IsEnabled())
+		}
 	}
 
-	// Start periodic announces
-	go func() {
-		for {
-			c.sendAnnounce()
-			time.Sleep(30 * time.Second)
-		}
-	}()
+	// Register announce handler with explicit type
+	var handler transport.AnnounceHandler = &ClientAnnounceHandler{client: c}
+	c.transport.RegisterAnnounceHandler(handler)
+
+	// Send initial announce
+	log.Printf("Sending initial announce...")
+	if err := c.sendAnnounce(); err != nil {
+		log.Printf("Warning: Failed to send initial announce: %v", err)
+	}
 
-	log.Printf("Client started with %d interfaces", len(c.interfaces))
 	return nil
 }
 
@@ -119,17 +157,33 @@ func (c *Client) handlePacket(data []byte, p *packet.Packet) {
 		return
 	}
 
-	packetType := data[0]
+	header := data[0]
+	packetType := header & 0x03 // Extract packet type from header
+
 	switch packetType {
-	case 0x04: // Announce packet
-		c.handleAnnounce(data[1:])
+	case announce.PACKET_TYPE_ANNOUNCE:
+		log.Printf("Received announce packet:")
+		log.Printf("  Raw data: %x", data)
+
+		// Create announce instance
+		a, err := announce.New(c.identity, []byte("RNS.Go.Client"), false)
+		if err != nil {
+			log.Printf("Failed to create announce handler: %v", err)
+			return
+		}
+
+		// Handle the announce
+		if err := a.HandleAnnounce(data[1:]); err != nil {
+			log.Printf("Failed to handle announce: %v", err)
+		}
+
 	default:
 		c.transport.HandlePacket(data, p)
 	}
 }
 
 func (c *Client) handleAnnounce(data []byte) {
-	if len(data) < 42 { // 32 bytes hash + 8 bytes timestamp + 1 byte hops + 1 byte flags
+	if len(data) < 42 {
 		log.Printf("Received malformed announce packet (too short)")
 		return
 	}
@@ -144,33 +198,41 @@ func (c *Client) handleAnnounce(data []byte) {
 	log.Printf("  Hops: %d", hops)
 	log.Printf("  Flags: %x", flags)
 
+	// Extract public key if present (after flags)
 	if len(data) > 42 {
+		pubKeyLen := 32 // Ed25519 public key length
+		pubKey := data[42 : 42+pubKeyLen]
+		log.Printf("  Public Key: %x", pubKey)
+
 		// Extract app data if present
-		dataLen := binary.BigEndian.Uint16(data[42:44])
-		if len(data) >= 44+int(dataLen) {
-			appData := data[44 : 44+dataLen]
-			log.Printf("  App Data: %s", string(appData))
+		var appData []byte
+		if len(data) > 42+pubKeyLen+2 {
+			dataLen := binary.BigEndian.Uint16(data[42+pubKeyLen : 42+pubKeyLen+2])
+			if len(data) >= 42+pubKeyLen+2+int(dataLen) {
+				appData = data[42+pubKeyLen+2 : 42+pubKeyLen+2+int(dataLen)]
+				log.Printf("  App Data: %s", string(appData))
+			}
 		}
+
+		// Store the identity for future use with all required parameters
+		if !identity.ValidateAnnounce(data, destHash, pubKey, data[len(data)-64:], appData) {
+			log.Printf("Failed to validate announce")
+			return
+		}
+		log.Printf("Successfully validated and stored announce")
 	}
 }
 
-func (c *Client) sendAnnounce() {
+func (c *Client) sendAnnounce() error {
+	// Create announce packet
+	identityHash := c.identity.Hash()
 	announceData := make([]byte, 0)
 
-	// Create header
-	header := announce.CreateHeader(
-		announce.IFAC_NONE,
-		announce.HEADER_TYPE_1,
-		0x00,
-		announce.PROP_TYPE_BROADCAST,
-		announce.DEST_TYPE_SINGLE,
-		announce.PACKET_TYPE_ANNOUNCE,
-		0x00,
-	)
+	// Add header
+	header := []byte{0x01, 0x00} // Announce packet type
 	announceData = append(announceData, header...)
 
-	// Add destination hash (16 bytes truncated)
-	identityHash := c.identity.Hash()
+	// Add destination hash
 	announceData = append(announceData, identityHash...)
 
 	// Add context byte
@@ -197,17 +259,32 @@ func (c *Client) sendAnnounce() {
 	log.Printf("  Packet Length: %d bytes", len(announceData))
 	log.Printf("  Full Packet: %x", announceData)
 
+	sentCount := 0
 	// Send on all interfaces
 	for _, iface := range c.interfaces {
-		log.Printf("Sending on interface %s (%s):", iface.GetName(), iface.GetType())
+		log.Printf("Attempting to send on interface %s:", iface.GetName())
+		log.Printf("  Type: %v", iface.GetType())
 		log.Printf("  MTU: %d bytes", iface.GetMTU())
+		log.Printf("  Status: enabled=%v", iface.IsEnabled())
+
+		if !iface.IsEnabled() {
+			log.Printf("  Skipping disabled interface")
+			continue
+		}
 
 		if err := iface.Send(announceData, ""); err != nil {
 			log.Printf("  Failed to send: %v", err)
 		} else {
 			log.Printf("  Successfully sent announce")
+			sentCount++
 		}
 	}
+
+	if sentCount == 0 {
+		return fmt.Errorf("no interfaces available to send announce")
+	}
+
+	return nil
 }
 
 func (c *Client) Stop() {
@@ -265,22 +342,67 @@ func (c *Client) handleLinkClosed(l *link.Link) {
 	log.Printf("Link closed")
 }
 
+type ClientAnnounceHandler struct {
+	client *Client
+}
+
+func (h *ClientAnnounceHandler) AspectFilter() []string {
+	return []string{"RNS.Go.Client"}
+}
+
+func (h *ClientAnnounceHandler) ReceivedAnnounce(destinationHash []byte, announcedIdentity interface{}, appData []byte) error {
+	log.Printf("=== Received Announce Details ===")
+	log.Printf("Destination Hash: %x", destinationHash)
+	log.Printf("App Data: %s", string(appData))
+
+	// Type assert the identity
+	if id, ok := announcedIdentity.(*identity.Identity); ok {
+		log.Printf("Identity Public Key: %x", id.GetPublicKey())
+
+		// Create packet hash for storage
+		packetHash := identity.TruncatedHash(append(destinationHash, id.GetPublicKey()...))
+		log.Printf("Generated Packet Hash: %x", packetHash)
+
+		// Store the peer identity with all required parameters
+		identity.Remember(packetHash, destinationHash, id.GetPublicKey(), appData)
+		log.Printf("Identity stored successfully")
+		log.Printf("===========================")
+		return nil
+	}
+
+	log.Printf("Error: Invalid identity type")
+	log.Printf("===========================")
+	return fmt.Errorf("invalid identity type")
+}
+
+func (h *ClientAnnounceHandler) ReceivePathResponses() bool {
+	return true
+}
+
 func main() {
 	flag.Parse()
 
+	log.Printf("Starting Reticulum Go client...")
+	log.Printf("Config path: %s", *configPath)
+	log.Printf("Target hash: %s", *targetHash)
+
 	var cfg *common.ReticulumConfig
 	var err error
 
 	if *configPath == "" {
+		log.Printf("No config path specified, using default configuration")
 		cfg, err = config.InitConfig()
 	} else {
+		log.Printf("Loading configuration from: %s", *configPath)
 		cfg, err = config.LoadConfig(*configPath)
 	}
 	if err != nil {
 		log.Fatalf("Failed to load config: %v", err)
 	}
+	log.Printf("Configuration loaded successfully")
 
 	if *generateIdentity {
+		log.Printf("Generating new identity...")
 		id, err := identity.New()
 		if err != nil {
 			log.Fatalf("Failed to generate identity: %v", err)
@@ -299,29 +421,79 @@ func main() {
 		log.Fatalf("Failed to start client: %v", err)
 	}
 
-	// Wait for interrupt
+	log.Printf("Client running, press Ctrl+C to exit")
+
+	// If target is specified, start interactive mode
+	if *targetHash != "" {
+		targetBytes, err := identity.HashFromString(*targetHash)
+		if err != nil {
+			log.Fatalf("Invalid target hash: %v", err)
+		}
+		link, err := client.transport.GetLink(targetBytes)
+		if err != nil {
+			log.Fatalf("Failed to get link: %v", err)
+		}
+		log.Printf("Starting interactive mode...")
+		interactiveLoop(link)
+		return
+	}
+
+	// Wait for interrupt if no target specified
 	sigChan := make(chan os.Signal, 1)
 	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
 	<-sigChan
+	log.Printf("Received interrupt signal, shutting down...")
 }
 
 func interactiveLoop(link *transport.Link) {
 	reader := bufio.NewReader(os.Stdin)
+	connected := make(chan struct{})
+	disconnected := make(chan struct{})
+
+	// Set up connection status handlers
+	link.OnConnected(func() {
+		connected <- struct{}{}
+	})
+
+	link.OnDisconnected(func() {
+		disconnected <- struct{}{}
+	})
+
+	// Wait for initial connection
+	select {
+	case <-connected:
+		log.Println("Connected to target")
+	case <-time.After(10 * time.Second):
+		log.Fatal("Connection timeout")
+		return
+	}
+
+	// Start input loop
 	for {
-		fmt.Print("> ")
-		input, err := reader.ReadString('\n')
-		if err != nil {
-			fmt.Printf("Error reading input: %v\n", err)
-			continue
-		}
-
-		input = strings.TrimSpace(input)
-		if input == "quit" || input == "exit" {
+		select {
+		case <-disconnected:
+			log.Println("Connection lost")
 			return
-		}
+		default:
+			fmt.Print("> ")
+			input, err := reader.ReadString('\n')
+			if err != nil {
+				if err == io.EOF {
+					return
+				}
+				log.Printf("Error reading input: %v", err)
+				continue
+			}
 
-		if err := link.Send([]byte(input)); err != nil {
-			fmt.Printf("Failed to send: %v\n", err)
+			input = strings.TrimSpace(input)
+			if input == "quit" || input == "exit" {
+				return
+			}
+
+			if err := link.Send([]byte(input)); err != nil {
+				log.Printf("Failed to send: %v", err)
+				return
+			}
 		}
 	}
 }
diff --git a/cmd/reticulum/main.go b/cmd/reticulum/main.go
index 39b9b58..5a06913 100644
--- a/cmd/reticulum/main.go
+++ b/cmd/reticulum/main.go
@@ -7,15 +7,15 @@ import (
 	"os/signal"
 	"syscall"
 
-	"github.com/Sudo-Ivan/reticulum-go/pkg/common"
 	"github.com/Sudo-Ivan/reticulum-go/internal/config"
-	"github.com/Sudo-Ivan/reticulum-go/pkg/transport"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/common"
 	"github.com/Sudo-Ivan/reticulum-go/pkg/interfaces"
+	"github.com/Sudo-Ivan/reticulum-go/pkg/transport"
 )
 
 type Reticulum struct {
-	config    *common.ReticulumConfig
-	transport *transport.Transport
+	config     *common.ReticulumConfig
+	transport  *transport.Transport
 	interfaces []interfaces.Interface
 }
 
@@ -48,11 +48,18 @@ func (r *Reticulum) Start() error {
 				ifaceConfig.TargetPort,
 				ifaceConfig.KISSFraming,
 				ifaceConfig.I2PTunneled,
+				ifaceConfig.Enabled,
 			)
 			if err != nil {
 				log.Printf("Failed to create TCP interface %s: %v", ifaceConfig.Name, err)
 				continue
 			}
+
+			if err := client.Start(); err != nil {
+				log.Printf("Failed to start TCP interface %s: %v", ifaceConfig.Name, err)
+				continue
+			}
+
 			iface = client
 
 		case "TCPServerInterface":
@@ -68,19 +75,33 @@ func (r *Reticulum) Start() error {
 				log.Printf("Failed to create TCP server interface %s: %v", ifaceConfig.Name, err)
 				continue
 			}
+
+			if err := server.Start(); err != nil {
+				log.Printf("Failed to start TCP server interface %s: %v", ifaceConfig.Name, err)
+				continue
+			}
+
 			iface = server
 
 		case "UDPInterface":
 			addr := fmt.Sprintf("%s:%d", ifaceConfig.Address, ifaceConfig.Port)
+
 			udp, err := interfaces.NewUDPInterface(
 				ifaceConfig.Name,
 				addr,
 				"", // No target address for server initially
+				ifaceConfig.Enabled,
 			)
 			if err != nil {
 				log.Printf("Failed to create UDP interface %s: %v", ifaceConfig.Name, err)
 				continue
 			}
+
+			if err := udp.Start(); err != nil {
+				log.Printf("Failed to start UDP interface %s: %v", ifaceConfig.Name, err)
+				continue
+			}
+
 			iface = udp
 
 		case "AutoInterface":
@@ -96,6 +117,8 @@ func (r *Reticulum) Start() error {
 			// Set packet callback to transport
 			iface.SetPacketCallback(r.transport.HandlePacket)
 			r.interfaces = append(r.interfaces, iface)
+			log.Printf("Created and started interface %s (type=%v, enabled=%v)",
+				iface.GetName(), iface.GetType(), iface.IsEnabled())
 		}
 	}
 
@@ -137,4 +160,4 @@ func main() {
 	if err := r.Stop(); err != nil {
 		log.Printf("Error during shutdown: %v", err)
 	}
-} 
\ No newline at end of file
+}
diff --git a/configs/test-client1.toml b/configs/test-client1.toml
index 62b672f..3d21b3b 100644
--- a/configs/test-client1.toml
+++ b/configs/test-client1.toml
@@ -9,10 +9,14 @@ loglevel = 4
   [interfaces."Local TCP"]
   type = "TCPClientInterface"
   enabled = true
-  target_host = "127.0.0.1"
+  target_host = "rns.quad4.io"
   target_port = 4242
 
   [interfaces."Local UDP"]
   type = "UDPInterface"
   enabled = true
-  interface = "lo" 
\ No newline at end of file
+  interface = "lo"
+  address = "127.0.0.1"
+  port = 37428
+  target_address = "127.0.0.1"
+  target_port = 37430
\ No newline at end of file
diff --git a/configs/test-client2.toml b/configs/test-client2.toml
index f289188..4dc7b41 100644
--- a/configs/test-client2.toml
+++ b/configs/test-client2.toml
@@ -9,10 +9,14 @@ loglevel = 4
   [interfaces."Local TCP"]
   type = "TCPClientInterface"
   enabled = true
-  target_host = "127.0.0.1"
+  target_host = "rns.quad4.io"
   target_port = 4243
 
   [interfaces."Local UDP"]
   type = "UDPInterface"
   enabled = true
-  interface = "lo" 
\ No newline at end of file
+  interface = "lo"
+  address = "127.0.0.1"
+  port = 37430
+  target_address = "127.0.0.1"
+  target_port = 37428 
\ No newline at end of file
diff --git a/internal/config/config.go b/internal/config/config.go
index c3b714c..690bf3a 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -93,7 +93,7 @@ func CreateDefaultConfig(path string) error {
 		Type:    "UDPInterface",
 		Enabled: true,
 		Address: "0.0.0.0",
-		Port:    37428, // Default RNS port
+		Port:    37696, // Default RNS port
 	}
 
 	data, err := toml.Marshal(cfg)
diff --git a/pkg/announce/announce.go b/pkg/announce/announce.go
index 0942af9..97d5368 100644
--- a/pkg/announce/announce.go
+++ b/pkg/announce/announce.go
@@ -93,16 +93,19 @@ func New(dest *identity.Identity, appData []byte, pathResponse bool) (*Announce,
 func (a *Announce) Propagate(interfaces []common.NetworkInterface) error {
 	packet := a.CreatePacket()
 
-	log.Printf("Propagating announce:")
+	// Enhanced logging
+	log.Printf("Creating announce packet:")
 	log.Printf("  Destination Hash: %x", a.destinationHash)
-	log.Printf("  Public Key: %x", a.identity.GetPublicKey())
+	log.Printf("  Identity Public Key: %x", a.identity.GetPublicKey())
 	log.Printf("  App Data: %s", string(a.appData))
-	log.Printf("  Packet Size: %d bytes", len(packet))
-	log.Printf("  Full Packet: %x", packet)
+	log.Printf("  Signature: %x", a.signature)
+	log.Printf("  Total Packet Size: %d bytes", len(packet))
+	log.Printf("  Raw Packet: %x", packet)
 
 	// Propagate to interfaces
 	for _, iface := range interfaces {
-		log.Printf("Propagating on interface %s (%s):", iface.GetName(), iface.GetType())
+		log.Printf("Propagating on interface %s:", iface.GetName())
+		log.Printf("  Interface Type: %s", iface.GetType())
 		log.Printf("  MTU: %d bytes", iface.GetMTU())
 
 		if err := iface.Send(packet, ""); err != nil {
@@ -136,18 +139,28 @@ func (a *Announce) HandleAnnounce(data []byte) error {
 	a.mutex.Lock()
 	defer a.mutex.Unlock()
 
+	// Enhanced validation logging
+	log.Printf("Received announce data (%d bytes):", len(data))
+	log.Printf("  Raw Data: %x", data)
+
 	// Validate announce data
 	if len(data) < 16+32+1 { // Min size: hash + pubkey + hops
+		log.Printf("  Error: Invalid announce data length (got %d, need at least %d)", 
+			len(data), 16+32+1)
 		return errors.New("invalid announce data")
 	}
 
-	// Extract fields
+	// Extract and log fields
 	destHash := data[:16]
 	publicKey := data[16:48]
 	hopCount := data[48]
 
-	// Validate hop count
+	log.Printf("  Destination Hash: %x", destHash)
+	log.Printf("  Public Key: %x", publicKey)
+	log.Printf("  Hop Count: %d", hopCount)
+
 	if hopCount > MAX_HOPS {
+		log.Printf("  Error: Exceeded maximum hop count (%d > %d)", hopCount, MAX_HOPS)
 		return errors.New("announce exceeded maximum hop count")
 	}
 
@@ -155,27 +168,36 @@ func (a *Announce) HandleAnnounce(data []byte) error {
 	appData := data[49 : len(data)-64]
 	signature := data[len(data)-64:]
 
+	log.Printf("  App Data (%d bytes): %s", len(appData), string(appData))
+	log.Printf("  Signature: %x", signature)
+
 	// Create announced identity from public key
 	announcedIdentity := identity.FromPublicKey(publicKey)
 	if announcedIdentity == nil {
+		log.Printf("  Error: Invalid identity public key")
 		return errors.New("invalid identity public key")
 	}
 
 	// Verify signature
 	signData := append(destHash, appData...)
 	if !announcedIdentity.Verify(signData, signature) {
+		log.Printf("  Error: Invalid announce signature")
 		return errors.New("invalid announce signature")
 	}
 
+	log.Printf("  Signature verification successful")
+
 	// Process announce with registered handlers
 	for _, handler := range a.handlers {
 		if handler.ReceivePathResponses() || !a.pathResponse {
 			if err := handler.ReceivedAnnounce(destHash, announcedIdentity, appData); err != nil {
+				log.Printf("  Handler error: %v", err)
 				return err
 			}
 		}
 	}
 
+	log.Printf("  Successfully processed announce")
 	return nil
 }
 
diff --git a/pkg/common/config.go b/pkg/common/config.go
index 6c35843..13577bb 100644
--- a/pkg/common/config.go
+++ b/pkg/common/config.go
@@ -9,17 +9,18 @@ type ConfigProvider interface {
 
 // InterfaceConfig represents interface configuration
 type InterfaceConfig struct {
-    Type        string `toml:"type"`
-    Name        string `toml:"name"`
-    Enabled     bool   `toml:"enabled"`
-    TargetHost  string `toml:"target_host,omitempty"`
-    TargetPort  int    `toml:"target_port,omitempty"`
-    Interface   string `toml:"interface,omitempty"`
-    Address     string `toml:"address,omitempty"`
-    Port        int    `toml:"port,omitempty"`
-    KISSFraming bool   `toml:"kiss_framing,omitempty"`
-    I2PTunneled bool   `toml:"i2p_tunneled,omitempty"`
-    PreferIPv6  bool   `toml:"prefer_ipv6,omitempty"`
+    Name         string `toml:"name"`
+    Type         string `toml:"type"`
+    Enabled      bool   `toml:"enabled"`
+    Address      string `toml:"address"`
+    Port         int    `toml:"port"`
+    TargetHost   string `toml:"target_host"`
+    TargetPort   int    `toml:"target_port"`
+    TargetAddress string `toml:"target_address"`
+    Interface    string `toml:"interface"`
+    KISSFraming  bool   `toml:"kiss_framing"`
+    I2PTunneled  bool   `toml:"i2p_tunneled"`
+    PreferIPv6   bool   `toml:"prefer_ipv6"`
 }
 
 // ReticulumConfig represents the main configuration structure
diff --git a/pkg/identity/identity.go b/pkg/identity/identity.go
index b299277..9fe9f33 100644
--- a/pkg/identity/identity.go
+++ b/pkg/identity/identity.go
@@ -15,6 +15,8 @@ import (
 	"sync"
 	"time"
 
+	"encoding/hex"
+
 	"golang.org/x/crypto/curve25519"
 	"golang.org/x/crypto/hkdf"
 )
@@ -448,19 +450,19 @@ func (i *Identity) DecryptWithHMAC(data []byte, key []byte) ([]byte, error) {
 
 func (i *Identity) ToFile(path string) error {
 	data := map[string]interface{}{
-		"private_key": i.privateKey,
-		"public_key": i.publicKey,
-		"signing_key": i.signingKey,
+		"private_key":      i.privateKey,
+		"public_key":       i.publicKey,
+		"signing_key":      i.signingKey,
 		"verification_key": i.verificationKey,
-		"app_data": i.appData,
+		"app_data":         i.appData,
 	}
-	
+
 	file, err := os.Create(path)
 	if err != nil {
 		return err
 	}
 	defer file.Close()
-	
+
 	return json.NewEncoder(file).Encode(data)
 }
 
@@ -470,22 +472,30 @@ func RecallIdentity(path string) (*Identity, error) {
 		return nil, err
 	}
 	defer file.Close()
-	
+
 	var data map[string]interface{}
 	if err := json.NewDecoder(file).Decode(&data); err != nil {
 		return nil, err
 	}
-	
+
 	// Reconstruct identity from saved data
 	id := &Identity{
-		privateKey: data["private_key"].([]byte),
-		publicKey: data["public_key"].([]byte),
-		signingKey: data["signing_key"].(ed25519.PrivateKey),
+		privateKey:      data["private_key"].([]byte),
+		publicKey:       data["public_key"].([]byte),
+		signingKey:      data["signing_key"].(ed25519.PrivateKey),
 		verificationKey: data["verification_key"].(ed25519.PublicKey),
-		appData: data["app_data"].([]byte),
-		ratchets: make(map[string][]byte),
-		ratchetExpiry: make(map[string]int64),
+		appData:         data["app_data"].([]byte),
+		ratchets:        make(map[string][]byte),
+		ratchetExpiry:   make(map[string]int64),
 	}
-	
+
 	return id, nil
 }
+
+func HashFromString(hash string) ([]byte, error) {
+	if len(hash) != 32 {
+		return nil, fmt.Errorf("invalid hash length: expected 32, got %d", len(hash))
+	}
+
+	return hex.DecodeString(hash)
+}
diff --git a/pkg/interfaces/interface.go b/pkg/interfaces/interface.go
index ba17711..715bab0 100644
--- a/pkg/interfaces/interface.go
+++ b/pkg/interfaces/interface.go
@@ -21,7 +21,10 @@ type Interface interface {
 	GetMode() common.InterfaceMode
 	IsOnline() bool
 	IsDetached() bool
+	IsEnabled() bool
 	Detach()
+	Enable()
+	Disable()
 	Send(data []byte, addr string) error
 	SetPacketCallback(common.PacketCallback)
 	GetPacketCallback() common.PacketCallback
@@ -33,12 +36,25 @@ type BaseInterface struct {
 	mode           common.InterfaceMode
 	ifType         common.InterfaceType
 	online         bool
+	enabled        bool
 	detached       bool
 	mtu            int
 	mutex          sync.RWMutex
 	packetCallback common.PacketCallback
 }
 
+func NewBaseInterface(name string, ifType common.InterfaceType, enabled bool) BaseInterface {
+	return BaseInterface{
+		name:     name,
+		mode:     common.IF_MODE_FULL,
+		ifType:   ifType,
+		online:   false,
+		enabled:  enabled,
+		detached: false,
+		mtu:      common.DEFAULT_MTU,
+	}
+}
+
 func (i *BaseInterface) SetPacketCallback(callback common.PacketCallback) {
 	i.Mutex.Lock()
 	defer i.Mutex.Unlock()
@@ -136,5 +152,21 @@ func (i *BaseInterface) GetConn() net.Conn {
 }
 
 func (i *BaseInterface) IsEnabled() bool {
-	return i.Online && !i.Detached
+	i.mutex.RLock()
+	defer i.mutex.RUnlock()
+	return i.enabled && i.online && !i.detached
+}
+
+func (i *BaseInterface) Enable() {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+	i.enabled = true
+	i.online = true
+}
+
+func (i *BaseInterface) Disable() {
+	i.mutex.Lock()
+	defer i.mutex.Unlock()
+	i.enabled = false
+	i.online = false
 }
diff --git a/pkg/interfaces/tcp.go b/pkg/interfaces/tcp.go
index e403a91..267abec 100644
--- a/pkg/interfaces/tcp.go
+++ b/pkg/interfaces/tcp.go
@@ -44,85 +44,56 @@ type TCPClientInterface struct {
 	packetCallback    common.PacketCallback
 	mutex             sync.RWMutex
 	detached          bool
+	enabled           bool
 }
 
-func NewTCPClient(name string, targetAddr string, targetPort int, kissFraming bool, i2pTunneled bool) (*TCPClientInterface, error) {
+func NewTCPClient(name string, targetHost string, targetPort int, kissFraming bool, i2pTunneled bool, enabled bool) (*TCPClientInterface, error) {
 	tc := &TCPClientInterface{
-		BaseInterface: BaseInterface{
-			name:     name,
-			mode:     common.IF_MODE_FULL,
-			ifType:   common.IF_TYPE_TCP,
-			online:   false,
-			mtu:      1064,
-			detached: false,
-		},
-		targetAddr:  targetAddr,
-		targetPort:  targetPort,
-		kissFraming: kissFraming,
-		i2pTunneled: i2pTunneled,
-		initiator:   true,
+		BaseInterface: NewBaseInterface(name, common.IF_TYPE_TCP, enabled),
+		targetAddr:    targetHost,
+		targetPort:    targetPort,
+		kissFraming:   kissFraming,
+		i2pTunneled:   i2pTunneled,
+		initiator:     true,
+		enabled:       enabled,
 	}
 
-	if err := tc.connect(true); err != nil {
-		go tc.reconnect()
-	} else {
-		go tc.readLoop()
+	if enabled {
+		addr := fmt.Sprintf("%s:%d", targetHost, targetPort)
+		conn, err := net.Dial("tcp", addr)
+		if err != nil {
+			return nil, err
+		}
+		tc.conn = conn
+		tc.online = true
 	}
 
 	return tc, nil
 }
 
-func (tc *TCPClientInterface) connect(initial bool) error {
+func (tc *TCPClientInterface) Start() error {
+	tc.mutex.Lock()
+	defer tc.mutex.Unlock()
+
+	if !tc.enabled {
+		return fmt.Errorf("interface not enabled")
+	}
+
+	if tc.conn != nil {
+		tc.online = true
+		return nil
+	}
+
 	addr := fmt.Sprintf("%s:%d", tc.targetAddr, tc.targetPort)
-	conn, err := net.DialTimeout("tcp", addr, time.Second*INITIAL_TIMEOUT)
+	conn, err := net.Dial("tcp", addr)
 	if err != nil {
-		if initial {
-			return fmt.Errorf("initial connection failed: %v", err)
-		}
 		return err
 	}
-
 	tc.conn = conn
-	tc.Online = true
-	tc.writing = false
-	tc.neverConnected = false
-
-	// Set TCP options
-	if tcpConn, ok := conn.(*net.TCPConn); ok {
-		tcpConn.SetNoDelay(true)
-		tcpConn.SetKeepAlive(true)
-		tcpConn.SetKeepAlivePeriod(time.Second * TCP_PROBE_INTERVAL)
-	}
-
+	tc.online = true
 	return nil
 }
 
-func (tc *TCPClientInterface) reconnect() {
-	if tc.initiator && !tc.reconnecting {
-		tc.reconnecting = true
-		attempts := 0
-
-		for !tc.Online {
-			time.Sleep(time.Second * RECONNECT_WAIT)
-			attempts++
-
-			if tc.maxReconnectTries > 0 && attempts > tc.maxReconnectTries {
-				tc.teardown()
-				break
-			}
-
-			if err := tc.connect(false); err != nil {
-				continue
-			}
-
-			go tc.readLoop()
-			break
-		}
-
-		tc.reconnecting = false
-	}
-}
-
 func (tc *TCPClientInterface) readLoop() {
 	buffer := make([]byte, tc.MTU)
 	inFrame := false
@@ -281,7 +252,9 @@ func (tc *TCPClientInterface) SetPacketCallback(cb common.PacketCallback) {
 }
 
 func (tc *TCPClientInterface) IsEnabled() bool {
-	return tc.Online
+	tc.mutex.RLock()
+	defer tc.mutex.RUnlock()
+	return tc.enabled && tc.online && !tc.detached
 }
 
 func (tc *TCPClientInterface) GetName() string {
@@ -306,17 +279,68 @@ func (tc *TCPClientInterface) IsOnline() bool {
 	return tc.online
 }
 
+func (tc *TCPClientInterface) reconnect() {
+	tc.mutex.Lock()
+	if tc.reconnecting {
+		tc.mutex.Unlock()
+		return
+	}
+	tc.reconnecting = true
+	tc.mutex.Unlock()
+
+	retries := 0
+	for retries < tc.maxReconnectTries {
+		tc.teardown()
+
+		addr := fmt.Sprintf("%s:%d", tc.targetAddr, tc.targetPort)
+		conn, err := net.Dial("tcp", addr)
+		if err == nil {
+			tc.mutex.Lock()
+			tc.conn = conn
+			tc.online = true
+			tc.neverConnected = false
+			tc.reconnecting = false
+			tc.mutex.Unlock()
+
+			// Restart read loop
+			go tc.readLoop()
+			return
+		}
+
+		retries++
+		// Wait before retrying
+		select {
+		case <-time.After(RECONNECT_WAIT * time.Second):
+			continue
+		}
+	}
+
+	// Failed to reconnect after max retries
+	tc.mutex.Lock()
+	tc.reconnecting = false
+	tc.mutex.Unlock()
+	tc.teardown()
+}
+
+func (tc *TCPClientInterface) Enable() {
+	tc.mutex.Lock()
+	defer tc.mutex.Unlock()
+	tc.online = true
+}
+
+func (tc *TCPClientInterface) Disable() {
+	tc.mutex.Lock()
+	defer tc.mutex.Unlock()
+	tc.online = false
+}
+
 type TCPServerInterface struct {
 	BaseInterface
-	listener       net.Listener
 	connections    map[string]net.Conn
 	mutex          sync.RWMutex
 	bindAddr       string
 	bindPort       int
 	preferIPv6     bool
-	spawned        bool
-	port           int
-	host           string
 	kissFraming    bool
 	i2pTunneled    bool
 	packetCallback common.PacketCallback
@@ -387,3 +411,15 @@ func (ts *TCPServerInterface) IsOnline() bool {
 	defer ts.mutex.RUnlock()
 	return ts.online
 }
+
+func (ts *TCPServerInterface) Enable() {
+	ts.mutex.Lock()
+	defer ts.mutex.Unlock()
+	ts.online = true
+}
+
+func (ts *TCPServerInterface) Disable() {
+	ts.mutex.Lock()
+	defer ts.mutex.Unlock()
+	ts.online = false
+}
diff --git a/pkg/interfaces/udp.go b/pkg/interfaces/udp.go
index 0380c6b..e6cb3f8 100644
--- a/pkg/interfaces/udp.go
+++ b/pkg/interfaces/udp.go
@@ -2,6 +2,7 @@ package interfaces
 
 import (
 	"fmt"
+	"log"
 	"net"
 	"sync"
 
@@ -19,9 +20,10 @@ type UDPInterface struct {
 	rxBytes    uint64
 	mtu        int
 	bitrate    int
+	enabled    bool
 }
 
-func NewUDPInterface(name string, addr string, target string) (*UDPInterface, error) {
+func NewUDPInterface(name string, addr string, target string, enabled bool) (*UDPInterface, error) {
 	udpAddr, err := net.ResolveUDPAddr("udp", addr)
 	if err != nil {
 		return nil, err
@@ -36,17 +38,12 @@ func NewUDPInterface(name string, addr string, target string) (*UDPInterface, er
 	}
 
 	ui := &UDPInterface{
-		BaseInterface: BaseInterface{
-			name:     name,
-			mode:     common.IF_MODE_FULL,
-			ifType:   common.IF_TYPE_UDP,
-			online:   false,
-			mtu:      common.DEFAULT_MTU,
-			detached: false,
-		},
-		addr:       udpAddr,
-		targetAddr: targetAddr,
-		readBuffer: make([]byte, common.DEFAULT_MTU),
+		BaseInterface: NewBaseInterface(name, common.IF_TYPE_UDP, enabled),
+		addr:         udpAddr,
+		targetAddr:   targetAddr,
+		readBuffer:   make([]byte, common.DEFAULT_MTU),
+		mtu:         common.DEFAULT_MTU,
+		enabled:     enabled,
 	}
 
 	return ui, nil
@@ -86,29 +83,16 @@ func (ui *UDPInterface) Detach() {
 }
 
 func (ui *UDPInterface) Send(data []byte, addr string) error {
-	if !ui.IsOnline() {
-		return fmt.Errorf("interface offline")
+	if !ui.IsEnabled() {
+		return fmt.Errorf("interface not enabled")
 	}
 
-	targetAddr := ui.targetAddr
-	if addr != "" {
-		var err error
-		targetAddr, err = net.ResolveUDPAddr("udp", addr)
-		if err != nil {
-			return fmt.Errorf("invalid target address: %v", err)
-		}
-	}
-
-	if targetAddr == nil {
+	if ui.targetAddr == nil {
 		return fmt.Errorf("no target address configured")
 	}
 
-	_, err := ui.conn.WriteToUDP(data, targetAddr)
-	if err != nil {
-		return fmt.Errorf("UDP write failed: %v", err)
-	}
-
-	return nil
+	_, err := ui.conn.WriteTo(data, ui.targetAddr)
+	return err
 }
 
 func (ui *UDPInterface) SetPacketCallback(callback common.PacketCallback) {
@@ -173,3 +157,58 @@ func (ui *UDPInterface) GetMTU() int {
 func (ui *UDPInterface) GetBitrate() int {
 	return ui.bitrate
 }
+
+func (ui *UDPInterface) Enable() {
+	ui.mutex.Lock()
+	defer ui.mutex.Unlock()
+	ui.online = true
+}
+
+func (ui *UDPInterface) Disable() {
+	ui.mutex.Lock()
+	defer ui.mutex.Unlock()
+	ui.online = false
+}
+
+func (ui *UDPInterface) Start() error {
+	conn, err := net.ListenUDP("udp", ui.addr)
+	if err != nil {
+		return err
+	}
+	ui.conn = conn
+	ui.online = true
+	return nil
+}
+
+func (ui *UDPInterface) readLoop() {
+	buffer := make([]byte, ui.mtu)
+	for {
+		if ui.IsDetached() {
+			return
+		}
+
+		n, addr, err := ui.conn.ReadFromUDP(buffer)
+		if err != nil {
+			if !ui.IsDetached() {
+				log.Printf("UDP read error: %v", err)
+			}
+			return
+		}
+
+		ui.mutex.Lock()
+		ui.rxBytes += uint64(n)
+		ui.mutex.Unlock()
+
+		log.Printf("Received %d bytes from %s", n, addr.String())
+
+		if callback := ui.GetPacketCallback(); callback != nil {
+			callback(buffer[:n], ui)
+		}
+	}
+}
+
+func (ui *UDPInterface) IsEnabled() bool {
+	ui.mutex.RLock()
+	defer ui.mutex.RUnlock()
+	return ui.enabled && ui.online && !ui.detached
+}
diff --git a/pkg/transport/transport.go b/pkg/transport/transport.go
index a7dd9dd..a0c5b88 100644
--- a/pkg/transport/transport.go
+++ b/pkg/transport/transport.go
@@ -54,6 +54,7 @@ type Transport struct {
 	mutex            sync.RWMutex
 	handlerLock      sync.RWMutex
 	pathLock         sync.RWMutex
+	links            map[string]*Link
 }
 
 func NewTransport(config *common.ReticulumConfig) (*Transport, error) {
@@ -61,6 +62,7 @@ func NewTransport(config *common.ReticulumConfig) (*Transport, error) {
 		config:     config,
 		interfaces: make(map[string]common.NetworkInterface),
 		paths:      make(map[string]*common.Path),
+		links:      make(map[string]*Link),
 	}
 
 	transportMutex.Lock()
@@ -126,6 +128,8 @@ type Link struct {
 	packetCb         func([]byte)
 	resourceCb       func(interface{}) bool
 	resourceStrategy int
+	connectedCb      func()
+	disconnectedCb   func()
 }
 
 type Destination struct {
@@ -183,6 +187,9 @@ func (l *Link) SetResourceCallback(cb func(interface{}) bool) {
 }
 
 func (l *Link) Teardown() {
+	if l.disconnectedCb != nil {
+		l.disconnectedCb()
+	}
 	if l.closedCb != nil {
 		l.closedCb()
 	}
@@ -206,7 +213,9 @@ func (l *Link) Send(data []byte) error {
 }
 
 type AnnounceHandler interface {
-	ReceivedAnnounce(destinationHash []byte, identity interface{}, appData []byte)
+	AspectFilter() []string
+	ReceivedAnnounce(destinationHash []byte, announcedIdentity interface{}, appData []byte) error
+	ReceivePathResponses() bool
 }
 
 func (t *Transport) RegisterAnnounceHandler(handler AnnounceHandler) {
@@ -630,3 +639,33 @@ func (t *Transport) SendPacket(p *packet.Packet) error {
 
 	return nil
 }
+
+func (t *Transport) GetLink(destHash []byte) (*Link, error) {
+	t.mutex.RLock()
+	defer t.mutex.RUnlock()
+	
+	link, exists := t.links[string(destHash)]
+	if !exists {
+		// Create new link if it doesn't exist
+		link = NewLink(
+			destHash,
+			nil,  // established callback
+			nil,  // closed callback
+		)
+		t.links[string(destHash)] = link
+	}
+	
+	return link, nil
+}
+
+func (l *Link) OnConnected(cb func()) {
+	l.connectedCb = cb
+	// If already established, trigger callback immediately
+	if !l.establishedAt.IsZero() && cb != nil {
+		cb()
+	}
+}
+
+func (l *Link) OnDisconnected(cb func()) {
+	l.disconnectedCb = cb
+}
diff --git a/scripts/run_clients.sh b/scripts/run_clients.sh
index 4b3c22b..65671b6 100755
--- a/scripts/run_clients.sh
+++ b/scripts/run_clients.sh
@@ -1,10 +1,47 @@
 #!/bin/bash
 
-# Build the client and server
-echo "Building Reticulum client..."
-go build -o bin/reticulum-client ./cmd/client
+# Function to show usage
+show_usage() {
+    echo "Usage: $0 [--type TYPE]"
+    echo "  --type    Type of client to run (default: client, options: client, ftp)"
+    exit 1
+}
+
+# Parse command line arguments
+CLIENT_TYPE="client"
+while [[ $# -gt 0 ]]; do
+    case $1 in
+        --type)
+            CLIENT_TYPE="$2"
+            shift 2
+            ;;
+        *)
+            show_usage
+            ;;
+    esac
+done
+
+# Validate client type
+if [[ "$CLIENT_TYPE" != "client" && "$CLIENT_TYPE" != "ftp" ]]; then
+    echo "Error: Invalid client type. Must be 'client' or 'ftp'"
+    show_usage
+fi
+
+# Build the appropriate binaries
+echo "Building Reticulum binaries..."
 go build -o bin/reticulum ./cmd/reticulum
 
+case $CLIENT_TYPE in
+    "client")
+        go build -o bin/reticulum-client ./cmd/client
+        CLIENT_BIN="reticulum-client"
+        ;;
+    "ftp")
+        go build -o bin/reticulum-client-ftp ./cmd/client-ftp
+        CLIENT_BIN="reticulum-client-ftp"
+        ;;
+esac
+
 # Check if build was successful
 if [ $? -ne 0 ]; then
     echo "Build failed!"
@@ -23,8 +60,8 @@ sleep 2  # Give server time to start
 
 # Generate identities for both clients
 echo "Generating identities..."
-CLIENT1_HASH=$(./bin/reticulum-client -config configs/test-client1.toml -generate-identity 2>&1 | grep "Identity hash:" | cut -d' ' -f3)
-CLIENT2_HASH=$(./bin/reticulum-client -config configs/test-client2.toml -generate-identity 2>&1 | grep "Identity hash:" | cut -d' ' -f3)
+CLIENT1_HASH=$(./bin/"$CLIENT_BIN" -config configs/test-client1.toml -generate-identity 2>&1 | grep "Identity hash:" | cut -d' ' -f3)
+CLIENT2_HASH=$(./bin/"$CLIENT_BIN" -config configs/test-client2.toml -generate-identity 2>&1 | grep "Identity hash:" | cut -d' ' -f3)
 
 echo "Client 1 Hash: $CLIENT1_HASH"
 echo "Client 2 Hash: $CLIENT2_HASH"
@@ -34,15 +71,35 @@ run_client() {
     local config=$1
     local target=$2
     local logfile=$3
-    echo "Starting client with config: $config targeting: $target"
-    ./bin/reticulum-client -config "$config" -target "$target" > "$logfile" 2>&1 &
+    
+    case $CLIENT_TYPE in
+        "client")
+            echo "Starting regular client with config: $config targeting: $target"
+            ./bin/"$CLIENT_BIN" -config "$config" -target "$target" > "$logfile" 2>&1 &
+            ;;
+        "ftp")
+            echo "Starting FTP client with config: $config serving directory: $target"
+            ./bin/"$CLIENT_BIN" -config "$config" -serve "$target" > "$logfile" 2>&1 &
+            ;;
+    esac
+    
     echo $! > "$logfile.pid"
     echo "Client started with PID: $(cat $logfile.pid)"
 }
 
-# Run both clients targeting each other
-run_client "configs/test-client1.toml" "$CLIENT2_HASH" "logs/client1.log"
-run_client "configs/test-client2.toml" "$CLIENT1_HASH" "logs/client2.log"
+# Run both clients with appropriate parameters
+case $CLIENT_TYPE in
+    "client")
+        run_client "configs/test-client1.toml" "$CLIENT2_HASH" "logs/client1.log"
+        run_client "configs/test-client2.toml" "$CLIENT1_HASH" "logs/client2.log"
+        ;;
+    "ftp")
+        # Create shared directories for FTP clients
+        mkdir -p ./shared/client1 ./shared/client2
+        run_client "configs/test-client1.toml" "./shared/client1" "logs/client1.log" "$CLIENT2_HASH"
+        run_client "configs/test-client2.toml" "./shared/client2" "logs/client2.log" "$CLIENT1_HASH"
+        ;;
+esac
 
 echo
 echo "Both clients are running. To stop everything:"
@@ -50,4 +107,11 @@ echo "kill \$(cat logs/*.pid)"
 echo
 echo "To view logs:"
 echo "tail -f logs/client1.log"
-echo "tail -f logs/client2.log" 
\ No newline at end of file
+echo "tail -f logs/client2.log"
+
+if [ "$CLIENT_TYPE" = "ftp" ]; then
+    echo
+    echo "FTP shared directories:"
+    echo "./shared/client1"
+    echo "./shared/client2"
+fi 
\ No newline at end of file