Add Send method to TCPClientInterface and better logging in UDPInterface

pkg/interfaces/udp.go

@@ -2,6 +2,7 @@ package interfaces
 
 import (
 	"fmt"
+	"log"
 	"net"
 	"sync"
 
@@ -75,6 +76,8 @@ func (ui *UDPInterface) Detach() {
 }
 
 func (ui *UDPInterface) Send(data []byte, addr string) error {
+	log.Printf("[DEBUG-7] UDP interface %s: Sending %d bytes", ui.Name, len(data))
+
 	if !ui.IsEnabled() {
 		return fmt.Errorf("interface not enabled")
 	}
@@ -83,7 +86,17 @@ func (ui *UDPInterface) Send(data []byte, addr string) error {
 		return fmt.Errorf("no target address configured")
 	}
 
+	// Update TX stats before sending
+	ui.mutex.Lock()
+	ui.TxBytes += uint64(len(data))
+	ui.mutex.Unlock()
+
 	_, err := ui.conn.WriteTo(data, ui.targetAddr)
+	if err != nil {
+		log.Printf("[DEBUG-1] UDP interface %s: Write failed: %v", ui.Name, err)
+	} else {
+		log.Printf("[DEBUG-7] UDP interface %s: Sent %d bytes successfully", ui.Name, len(data))
+	}
 	return err
 }