static inline void sendto_ipselect(FAR struct net_driver_s *dev,
FAR struct sendto_s *pstate)
{
FAR struct socket *psock = pstate->st_sock;
DEBUGASSERT(psock);
/* Which domain the the socket support */
if (psock->s_domain == PF_INET)
{
/* Select the IPv4 domain */
udp_ipv4_select(dev);
}
else /* if (psock->s_domain == PF_INET6) */
{
/* Select the IPv6 domain */
DEBUGASSERT(psock->s_domain == PF_INET6);
udp_ipv4_select(dev);
}
}
void udp_poll(FAR struct net_driver_s *dev, FAR struct udp_conn_s *conn)
{
/* Verify that the UDP connection is valid */
if (conn->lport != 0)
{
/* Set up for the callback. We can't know in advance if the application
* is going to send a IPv4 or an IPv6 packet, so this setup may not
* actually be used.
*/
#if defined(CONFIG_NET_IPv4)
udp_ipv4_select(dev);
#else /* if defined(CONFIG_NET_IPv6) */
udp_ipv6_select(dev);
#endif
dev->d_len = 0;
dev->d_sndlen = 0;
/* Perform the application callback */
(void)udp_callback(dev, conn, UDP_POLL);
/* If the application has data to send, setup the UDP/IP header */
if (dev->d_sndlen > 0)
{
udp_send(dev, conn);
return;
}
}
/* Make sure that d_len is zero meaning that there is nothing to be sent */
dev->d_len = 0;
}
