static void
ospf6_interface_state_change (u_char next_state, struct ospf6_interface *oi)
{
u_char prev_state;
prev_state = oi->state;
oi->state = next_state;
if (prev_state == next_state)
return;
/* log */
if (IS_OSPF6_DEBUG_INTERFACE)
{
zlog_debug ("Interface state change %s: %s -> %s", oi->interface->name,
ospf6_interface_state_str[prev_state],
ospf6_interface_state_str[next_state]);
}
oi->state_change++;
if ((prev_state == OSPF6_INTERFACE_DR ||
prev_state == OSPF6_INTERFACE_BDR) &&
(next_state != OSPF6_INTERFACE_DR &&
next_state != OSPF6_INTERFACE_BDR))
ospf6_sso (oi->interface->ifindex, &alldrouters6, IPV6_LEAVE_GROUP);
if ((prev_state != OSPF6_INTERFACE_DR &&
prev_state != OSPF6_INTERFACE_BDR) &&
(next_state == OSPF6_INTERFACE_DR ||
next_state == OSPF6_INTERFACE_BDR))
ospf6_sso (oi->interface->ifindex, &alldrouters6, IPV6_JOIN_GROUP);
OSPF6_ROUTER_LSA_SCHEDULE (oi->area);
if (next_state == OSPF6_INTERFACE_DOWN)
{
OSPF6_NETWORK_LSA_EXECUTE (oi);
OSPF6_INTRA_PREFIX_LSA_EXECUTE_TRANSIT (oi);
OSPF6_INTRA_PREFIX_LSA_SCHEDULE_STUB (oi->area);
}
else if (prev_state == OSPF6_INTERFACE_DR ||
next_state == OSPF6_INTERFACE_DR)
{
OSPF6_NETWORK_LSA_SCHEDULE (oi);
OSPF6_INTRA_PREFIX_LSA_SCHEDULE_TRANSIT (oi);
OSPF6_INTRA_PREFIX_LSA_SCHEDULE_STUB (oi->area);
}
#ifdef HAVE_SNMP
/* Terminal state or regression */
if ((next_state == OSPF6_INTERFACE_POINTTOPOINT) ||
(next_state == OSPF6_INTERFACE_DROTHER) ||
(next_state == OSPF6_INTERFACE_BDR) ||
(next_state == OSPF6_INTERFACE_DR) ||
(next_state < prev_state))
ospf6TrapIfStateChange (oi);
#endif
}
int
interface_down (struct thread *thread)
{
struct ospf6_interface *oi;
struct listnode *node, *nnode;
struct ospf6_neighbor *on;
oi = (struct ospf6_interface *) THREAD_ARG (thread);
assert (oi && oi->interface);
if (IS_OSPF6_DEBUG_INTERFACE)
zlog_debug ("Interface Event %s: [InterfaceDown]",
oi->interface->name);
/* Leave AllSPFRouters */
if (oi->state > OSPF6_INTERFACE_DOWN)
ospf6_sso (oi->interface->ifindex, &allspfrouters6, IPV6_LEAVE_GROUP);
ospf6_interface_state_change (OSPF6_INTERFACE_DOWN, oi);
for (ALL_LIST_ELEMENTS (oi->neighbor_list, node, nnode, on))
ospf6_neighbor_delete (on);
list_delete_all_node (oi->neighbor_list);
return 0;
}
static void
ospf6_interface_state_change (u_char next_state, struct ospf6_interface *oi)
{
u_char prev_state;
prev_state = oi->state;
oi->state = next_state;
if (prev_state == next_state)
return;
/* log */
if (IS_OSPF6_DEBUG_INTERFACE)
{
zlog_debug ("Interface state change %s: %s -> %s", oi->interface->name,
ospf6_interface_state_str[prev_state],
ospf6_interface_state_str[next_state]);
}
if ((prev_state == OSPF6_INTERFACE_DR ||
prev_state == OSPF6_INTERFACE_BDR) &&
(next_state != OSPF6_INTERFACE_DR &&
next_state != OSPF6_INTERFACE_BDR))
ospf6_sso (oi->interface->ifindex, &alldrouters6, IPV6_LEAVE_GROUP);
if ((prev_state != OSPF6_INTERFACE_DR &&
prev_state != OSPF6_INTERFACE_BDR) &&
(next_state == OSPF6_INTERFACE_DR ||
next_state == OSPF6_INTERFACE_BDR))
ospf6_sso (oi->interface->ifindex, &alldrouters6, IPV6_JOIN_GROUP);
OSPF6_ROUTER_LSA_SCHEDULE (oi->area);
if (next_state == OSPF6_INTERFACE_DOWN)
{
OSPF6_NETWORK_LSA_EXECUTE (oi);
OSPF6_INTRA_PREFIX_LSA_EXECUTE_TRANSIT (oi);
OSPF6_INTRA_PREFIX_LSA_SCHEDULE_STUB (oi->area);
}
else if (prev_state == OSPF6_INTERFACE_DR ||
next_state == OSPF6_INTERFACE_DR)
{
OSPF6_NETWORK_LSA_SCHEDULE (oi);
OSPF6_INTRA_PREFIX_LSA_SCHEDULE_TRANSIT (oi);
OSPF6_INTRA_PREFIX_LSA_SCHEDULE_STUB (oi->area);
}
}
/* Interface State Machine */
int
interface_up (struct thread *thread)
{
struct ospf6_interface *oi;
oi = (struct ospf6_interface *) THREAD_ARG (thread);
assert (oi && oi->interface);
if (IS_OSPF6_DEBUG_INTERFACE)
zlog_debug ("Interface Event %s: [InterfaceUp]",
oi->interface->name);
/* check physical interface is up */
if (! if_is_up (oi->interface))
{
if (IS_OSPF6_DEBUG_INTERFACE)
zlog_debug ("Interface %s is down, can't execute [InterfaceUp]",
oi->interface->name);
return 0;
}
/* if already enabled, do nothing */
if (oi->state > OSPF6_INTERFACE_DOWN)
{
if (IS_OSPF6_DEBUG_INTERFACE)
zlog_debug ("Interface %s already enabled",
oi->interface->name);
return 0;
}
/* Join AllSPFRouters */
ospf6_sso (oi->interface->ifindex, &allspfrouters6, IPV6_JOIN_GROUP);
/* Update interface route */
ospf6_interface_connected_route_update (oi->interface);
/* Schedule Hello */
if (! CHECK_FLAG (oi->flag, OSPF6_INTERFACE_PASSIVE))
thread_add_event (master, ospf6_hello_send, oi, 0);
/* decide next interface state */
if (if_is_pointopoint (oi->interface))
ospf6_interface_state_change (OSPF6_INTERFACE_POINTTOPOINT, oi);
else if (oi->priority == 0)
ospf6_interface_state_change (OSPF6_INTERFACE_DROTHER, oi);
else
{
ospf6_interface_state_change (OSPF6_INTERFACE_WAITING, oi);
thread_add_timer (master, wait_timer, oi, oi->dead_interval);
}
return 0;
}
