usbip_net_send
rc = usbip_net_send(sockfd, (void *) &request, sizeof(request));
rc = usbip_net_send(sockfd, &op_common, sizeof(op_common));
ssize_t usbip_net_send(int sockfd, void *buff, size_t bufflen);
rc = usbip_net_send(sockfd, &pdu_udev, sizeof(pdu_udev));
rc = usbip_net_send(connfd, &reply, sizeof(reply));
rc = usbip_net_send(connfd, &pdu_udev, sizeof(pdu_udev));
rc = usbip_net_send(connfd, &pdu_uinf,