fix: Add -nn flag to tcpdump commands to resolve macOS capture issues

internal/capture/local.go

@@ -46,7 +46,8 @@ func (c *LocalCapturer) Start(iface string, port int) error {
 	// -l: line buffered
 	// -A: print packet payload in ASCII
 	// -s 0: capture full packets
-	args := []string{"-l", "-A", "-s", "0", "-i", iface, "port", fmt.Sprintf("%d", port)}
+	// -nn: don't resolve hostnames or port names
+	args := []string{"-l", "-nn", "-A", "-s", "0", "-i", iface, "port", fmt.Sprintf("%d", port)}
 	c.cmd = exec.CommandContext(ctx, "tcpdump", args...)
 
 	stdout, err := c.cmd.StdoutPipe()