void
ospf_if_set_multicast(struct ospf_interface *oi)
{
if ((oi->state > ISM_Loopback) &&
(oi->type != OSPF_IFTYPE_LOOPBACK) &&
(oi->type != OSPF_IFTYPE_VIRTUALLINK) &&
(OSPF_IF_PASSIVE_STATUS(oi) == OSPF_IF_ACTIVE))
{
/* The interface should belong to the OSPF-all-routers group. */
if (!OI_MEMBER_CHECK(oi, MEMBER_ALLROUTERS) &&
(ospf_if_add_allspfrouters(oi->ospf, oi->address,
oi->ifp->ifindex) >= 0))
/* Set the flag only if the system call to join succeeded. */
OI_MEMBER_JOINED(oi, MEMBER_ALLROUTERS);
}
else
{
/* The interface should NOT belong to the OSPF-all-routers group. */
if (OI_MEMBER_CHECK(oi, MEMBER_ALLROUTERS))
{
/* Only actually drop if this is the last reference */
if (OI_MEMBER_COUNT(oi, MEMBER_ALLROUTERS) == 1)
ospf_if_drop_allspfrouters (oi->ospf, oi->address,
oi->ifp->ifindex);
/* Unset the flag regardless of whether the system call to leave
the group succeeded, since it's much safer to assume that
we are not a member. */
OI_MEMBER_LEFT(oi,MEMBER_ALLROUTERS);
}
}
if (((oi->type == OSPF_IFTYPE_BROADCAST) ||
(oi->type == OSPF_IFTYPE_POINTOPOINT)) &&
((oi->state == ISM_DR) || (oi->state == ISM_Backup)) &&
(OSPF_IF_PASSIVE_STATUS(oi) == OSPF_IF_ACTIVE))
{
/* The interface should belong to the OSPF-designated-routers group. */
if (!OI_MEMBER_CHECK(oi, MEMBER_DROUTERS) &&
(ospf_if_add_alldrouters(oi->ospf, oi->address,
oi->ifp->ifindex) >= 0))
/* Set the flag only if the system call to join succeeded. */
OI_MEMBER_JOINED(oi, MEMBER_DROUTERS);
}
else
{
/* The interface should NOT belong to the OSPF-designated-routers group */
if (OI_MEMBER_CHECK(oi, MEMBER_DROUTERS))
{
/* drop only if last reference */
if (OI_MEMBER_COUNT(oi, MEMBER_DROUTERS) == 1)
ospf_if_drop_alldrouters(oi->ospf, oi->address, oi->ifp->ifindex);
/* Unset the flag regardless of whether the system call to leave
the group succeeded, since it's much safer to assume that
we are not a member. */
OI_MEMBER_LEFT(oi, MEMBER_DROUTERS);
}
}
}
int
ospf_if_up (struct ospf_interface *oi)
{
if (oi == NULL)
return 0;
if (oi->type == OSPF_IFTYPE_LOOPBACK)
OSPF_ISM_EVENT_SCHEDULE (oi, ISM_LoopInd);
else
{
if (oi->type != OSPF_IFTYPE_VIRTUALLINK)
ospf_if_add_allspfrouters (oi->ospf, oi->address, oi->ifp->ifindex);
ospf_if_stream_set (oi);
OSPF_ISM_EVENT_SCHEDULE (oi, ISM_InterfaceUp);
}
return 1;
}
