void igmp_poll(FAR struct net_driver_s *dev)
{
FAR struct igmp_group_s *group;
nllvdbg("Entry\n");
/* Setup the poll operation */
dev->d_appdata = &dev->d_buf[NET_LL_HDRLEN(dev) + IPIGMP_HDRLEN];
dev->d_snddata = &dev->d_buf[NET_LL_HDRLEN(dev) + IPIGMP_HDRLEN];
dev->d_len = 0;
dev->d_sndlen = 0;
/* Check each member of the group */
for (group = (FAR struct igmp_group_s *)dev->grplist.head;
group;
group = group->next)
{
/* Does this member have a pending outgoing message? */
if (IS_SCHEDMSG(group->flags))
{
/* Yes, create the IGMP message in the driver buffer */
igmp_sched_send(dev, group);
/* Mark the message as sent and break out */
CLR_SCHEDMSG(group->flags);
break;
}
}
}
void igmp_waitmsg(FAR struct igmp_group_s *group, uint8_t msgid)
{
net_lock_t flags;
/* Schedule to send the message */
flags = net_lock();
DEBUGASSERT(!IS_WAITMSG(group->flags));
SET_WAITMSG(group->flags);
igmp_schedmsg(group, msgid);
/* Then wait for the message to be sent */
while (IS_SCHEDMSG(group->flags))
{
/* Wait for the semaphore to be posted */
while (net_lockedwait(&group->sem) != 0)
{
/* The only error that should occur from net_lockedwait() is if
* the wait is awakened by a signal.
*/
ASSERT(get_errno() == EINTR);
}
}
/* The message has been sent and we are no longer waiting */
CLR_WAITMSG(group->flags);
net_unlock(flags);
}
void igmp_schedmsg(FAR struct igmp_group_s *group, uint8_t msgid)
{
net_lock_t flags;
/* The following should be atomic */
flags = net_lock();
DEBUGASSERT(!IS_SCHEDMSG(group->flags));
group->msgid = msgid;
SET_SCHEDMSG(group->flags);
net_unlock(flags);
}
