Function tap_nl_send

dpdk/drivers/net/tap/tap_netlink.c:117–136

* Send a message to the kernel on the netlink socket. * * @param[in] nlsk_fd * The netlink socket file descriptor used for communication. * @param[in] nh * The netlink message send to the kernel. * * @return * the number of sent bytes on success, -1 otherwise. */

 *   the number of sent bytes on success, -1 otherwise.
 */
int
tap_nl_send(int nlsk_fd, struct nlmsghdr *nh)
{
	int send_bytes;

	nh->nlmsg_pid = 0; /* communication with the kernel uses pid 0 */
	nh->nlmsg_seq = (uint32_t)rte_rand();

retry:
	send_bytes = send(nlsk_fd, nh, nh->nlmsg_len, 0);
	if (send_bytes < 0) {
		if (errno == EINTR)
			goto retry;

		TAP_LOG(ERR, "Failed to send netlink message: %s (%d)",
			strerror(errno), errno);
		return -1;
	}
	return send_bytes;
}

#ifdef NETLINK_EXT_ACK
static const struct nlattr *