void uip_igmpdevinit(struct uip_driver_s *dev)
{
nvdbg("IGMP initializing dev %p\n", dev);
DEBUGASSERT(dev->grplist.head == NULL);
/* Add the all systems address to the group */
(void)uip_grpalloc(dev, &g_allsystems);
/* Allow the IGMP messages at the MAC level */
uip_addmcastmac(dev, &g_allrouters);
uip_addmcastmac(dev, &g_allsystems);
}
int igmp_joingroup(struct uip_driver_s *dev, FAR const struct in_addr *grpaddr)
{
struct igmp_group_s *group;
DEBUGASSERT(dev && grpaddr);
/* Check if a this address is already in the group */
group = uip_grpfind(dev, &grpaddr->s_addr);
if (!group)
{
/* No... allocate a new entry */
nvdbg("Join to new group: %08x\n", grpaddr->s_addr);
group = uip_grpalloc(dev, &grpaddr->s_addr);
IGMP_STATINCR(uip_stat.igmp.joins);
/* Send the Membership Report */
IGMP_STATINCR(uip_stat.igmp.report_sched);
uip_igmpwaitmsg(group, IGMPv2_MEMBERSHIP_REPORT);
/* And start the timer at 10*100 msec */
uip_igmpstarttimer(group, 10);
/* Add the group (MAC) address to the ether drivers MAC filter list */
uip_addmcastmac(dev, (FAR uip_ipaddr_t *)&grpaddr->s_addr);
return OK;
}
/* Return EEXIST if the address is already a member of the group */
return -EEXIST;
}
