in internal/ip/ip.go [138:145]
func (c *Conn) Close(logger *log.Logger) {
if err := syscall.Close(c.recvSrc.fd); err != nil {
logger.Error("error closing Conn recv file descriptor", zap.Error(err))
}
if err := syscall.Close(c.sendFD); err != nil {
logger.Error("error closing Conn send file descriptor", zap.Error(err))
}
}