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_PARAM(oi, passive_interface) == 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_PARAM(oi, passive_interface) == 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_get_output_cost (struct ospf_interface *oi)
{
/* If all else fails, use default OSPF cost */
u_int32_t cost;
u_int32_t bw, refbw;
bw = oi->ifp->bandwidth ? oi->ifp->bandwidth : OSPF_DEFAULT_BANDWIDTH;
refbw = oi->ospf->ref_bandwidth;
/* A specifed ip ospf cost overrides a calculated one. */
if (OSPF_IF_PARAM_CONFIGURED (IF_DEF_PARAMS (oi->ifp), output_cost_cmd) ||
OSPF_IF_PARAM_CONFIGURED (oi->params, output_cost_cmd))
cost = OSPF_IF_PARAM (oi, output_cost_cmd);
/* See if a cost can be calculated from the zebra processes
interface bandwidth field. */
else
{
cost = (u_int32_t) ((double)refbw / (double)bw + (double)0.5);
if (cost < 1)
cost = 1;
else if (cost > 65535)
cost = 65535;
}
return cost;
}
struct ospf_interface *
ospf_if_new (struct ospf *ospf, struct interface_FOO *ifp, struct prefix *p)
{
struct ospf_interface *oi;
if ((oi = ospf_if_table_lookup (ifp, p)) == NULL)
{
oi = XCALLOC (MTYPE_OSPF_IF, sizeof (struct ospf_interface));
memset (oi, 0, sizeof (struct ospf_interface));
}
else
return oi;
/* Set zebra interface pointer. */
oi->ifp = ifp;
oi->address = p;
ospf_add_to_if (ifp, oi);
listnode_add (ospf->oiflist, oi);
/* Clear self-originated network-LSA. */
oi->network_lsa_self = NULL;
/* Initialize neighbor list. */
oi->nbrs = route_table_init ();
/* Initialize static neighbor list. */
oi->nbr_nbma = list_new ();
/* Initialize Link State Acknowledgment list. */
oi->ls_ack = list_new ();
oi->ls_ack_direct.ls_ack = list_new ();
/* Set default values. */
ospf_if_reset_variables (oi);
/* Add pseudo neighbor. */
oi->nbr_self = ospf_nbr_new (oi);
oi->nbr_self->state = NSM_TwoWay;
oi->nbr_self->priority = OSPF_IF_PARAM (oi, priority);
oi->nbr_self->options = OSPF_OPTION_E;
oi->ls_upd_queue = route_table_init ();
oi->t_ls_upd_event = NULL;
oi->t_ls_ack_direct = NULL;
oi->crypt_seqnum = time (NULL);
#ifdef HAVE_OPAQUE_LSA
ospf_opaque_type9_lsa_init (oi);
#endif /* HAVE_OPAQUE_LSA */
oi->ospf = ospf;
return oi;
}
struct ospf_neighbor *
ospf_nbr_new (struct ospf_interface *oi)
{
struct ospf_neighbor *nbr;
/* Allcate new neighbor. */
nbr = XMALLOC (MTYPE_OSPF_NEIGHBOR, sizeof (struct ospf_neighbor));
memset (nbr, 0, sizeof (struct ospf_neighbor));
/* Relate neighbor to the interface. */
nbr->oi = oi;
/* Set default values. */
nbr->state = NSM_Down;
/* Set inheritance values. */
nbr->v_inactivity = OSPF_IF_PARAM (oi, v_wait);
nbr->v_db_desc = OSPF_IF_PARAM (oi, retransmit_interval);
nbr->v_ls_req = OSPF_IF_PARAM (oi, retransmit_interval);
nbr->v_ls_upd = OSPF_IF_PARAM (oi, retransmit_interval);
nbr->priority = -1;
/* DD flags. */
nbr->dd_flags = OSPF_DD_FLAG_MS|OSPF_DD_FLAG_M|OSPF_DD_FLAG_I;
/* Last received and sent DD. */
nbr->last_send = NULL;
nbr->nbr_nbma = NULL;
ospf_lsdb_init (&nbr->db_sum);
ospf_lsdb_init (&nbr->ls_rxmt);
ospf_lsdb_init (&nbr->ls_req);
nbr->crypt_seqnum = 0;
return nbr;
}
/* Add self to nbr list. */
void ospf_nbr_add_self(struct ospf_interface *oi, struct in_addr router_id)
{
struct prefix p;
struct route_node *rn;
if (!oi->nbr_self)
oi->nbr_self = ospf_nbr_new(oi);
/* Initial state */
oi->nbr_self->address = *oi->address;
oi->nbr_self->priority = OSPF_IF_PARAM(oi, priority);
oi->nbr_self->router_id = router_id;
oi->nbr_self->src = oi->address->u.prefix4;
oi->nbr_self->state = NSM_TwoWay;
switch (oi->area->external_routing) {
case OSPF_AREA_DEFAULT:
SET_FLAG(oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_STUB:
UNSET_FLAG(oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_NSSA:
UNSET_FLAG(oi->nbr_self->options, OSPF_OPTION_E);
SET_FLAG(oi->nbr_self->options, OSPF_OPTION_NP);
break;
}
/* Add nbr_self to nbrs table */
ospf_nbr_key(oi, oi->nbr_self, &p);
rn = route_node_get(oi->nbrs, &p);
if (rn->info) {
/* There is already pseudo neighbor. */
zlog_warn(
"router_id %s already present in neighbor table. node refcount %u",
inet_ntoa(router_id), rn->lock);
route_unlock_node(rn);
} else
rn->info = oi->nbr_self;
}
int
ospf_hello_timer (struct thread *thread)
{
struct ospf_interface *oi;
oi = THREAD_ARG (thread);
oi->t_hello = NULL;
if (IS_DEBUG_OSPF (ism, ISM_TIMERS))
zlog (NULL, LOG_DEBUG, "ISM[%s]: Timer (Hello timer expire)",
IF_NAME (oi));
/* Sending hello packet. */
ospf_hello_send (oi);
/* Hello timer set. */
OSPF_ISM_TIMER_ON (oi->t_hello, ospf_hello_timer,
OSPF_IF_PARAM (oi, v_hello));
return 0;
}
/* Add self to nbr list. */
void
ospf_nbr_add_self (struct ospf_interface *oi)
{
struct prefix p;
struct route_node *rn;
/* Initial state */
oi->nbr_self->address = *oi->address;
oi->nbr_self->priority = OSPF_IF_PARAM (oi, priority);
oi->nbr_self->router_id = oi->ospf->router_id;
oi->nbr_self->src = oi->address->u.prefix4;
oi->nbr_self->state = NSM_TwoWay;
switch (oi->area->external_routing)
{
case OSPF_AREA_DEFAULT:
SET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_STUB:
UNSET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_NSSA:
UNSET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
SET_FLAG (oi->nbr_self->options, OSPF_OPTION_NP);
break;
}
/* Add nbr_self to nbrs table */
ospf_nbr_key (oi, oi->nbr_self, &p);
rn = route_node_get (oi->nbrs, &p);
if (rn->info)
{
/* There is already pseudo neighbor. */
assert (oi->nbr_self == rn->info);
route_unlock_node (rn);
}
else
rn->info = oi->nbr_self;
}
/* Hook function called after ospf ISM event is occured. And vty's
network command invoke this function after making interface
structure. */
static void
ism_timer_set (struct ospf_interface *oi)
{
switch (oi->state)
{
case ISM_Down:
/* First entry point of ospf interface state machine. In this state
interface parameters must be set to initial values, and timers are
reset also. */
OSPF_ISM_TIMER_OFF (oi->t_hello);
OSPF_ISM_TIMER_OFF (oi->t_wait);
OSPF_ISM_TIMER_OFF (oi->t_ls_ack);
break;
case ISM_Loopback:
/* In this state, the interface may be looped back and will be
unavailable for regular data traffic. */
OSPF_ISM_TIMER_OFF (oi->t_hello);
OSPF_ISM_TIMER_OFF (oi->t_wait);
OSPF_ISM_TIMER_OFF (oi->t_ls_ack);
break;
case ISM_Waiting:
/* The router is trying to determine the identity of DRouter and
BDRouter. The router begin to receive and send Hello Packets. */
/* send first hello immediately */
OSPF_ISM_TIMER_MSEC_ON (oi->t_hello, ospf_hello_timer, 1);
OSPF_ISM_TIMER_ON (oi->t_wait, ospf_wait_timer,
OSPF_IF_PARAM (oi, v_wait));
OSPF_ISM_TIMER_OFF (oi->t_ls_ack);
break;
case ISM_PointToPoint:
/* The interface connects to a physical Point-to-point network or
virtual link. The router attempts to form an adjacency with
neighboring router. Hello packets are also sent. */
/* send first hello immediately */
OSPF_ISM_TIMER_MSEC_ON (oi->t_hello, ospf_hello_timer, 1);
OSPF_ISM_TIMER_OFF (oi->t_wait);
OSPF_ISM_TIMER_ON (oi->t_ls_ack, ospf_ls_ack_timer, oi->v_ls_ack);
break;
case ISM_DROther:
/* The network type of the interface is broadcast or NBMA network,
and the router itself is neither Designated Router nor
Backup Designated Router. */
OSPF_HELLO_TIMER_ON (oi);
OSPF_ISM_TIMER_OFF (oi->t_wait);
OSPF_ISM_TIMER_ON (oi->t_ls_ack, ospf_ls_ack_timer, oi->v_ls_ack);
break;
case ISM_Backup:
/* The network type of the interface is broadcast os NBMA network,
and the router is Backup Designated Router. */
OSPF_HELLO_TIMER_ON (oi);
OSPF_ISM_TIMER_OFF (oi->t_wait);
OSPF_ISM_TIMER_ON (oi->t_ls_ack, ospf_ls_ack_timer, oi->v_ls_ack);
break;
case ISM_DR:
/* The network type of the interface is broadcast or NBMA network,
and the router is Designated Router. */
OSPF_HELLO_TIMER_ON (oi);
OSPF_ISM_TIMER_OFF (oi->t_wait);
OSPF_ISM_TIMER_ON (oi->t_ls_ack, ospf_ls_ack_timer, oi->v_ls_ack);
break;
}
}
/* Restore an interface to its pre UP state
Used from ism_interface_down only */
void
ospf_if_cleanup (struct ospf_interface *oi)
{
struct route_node *rn;
struct listnode *node;
struct ospf_neighbor *nbr;
/* oi->nbrs and oi->nbr_nbma should be deletete on InterafceDown event */
/* delete all static neighbors attached to this interface */
for (node = listhead (oi->nbr_nbma); node; )
{
struct ospf_nbr_nbma *nbr_nbma = getdata (node);
nextnode (node);
OSPF_POLL_TIMER_OFF (nbr_nbma->t_poll);
if (nbr_nbma->nbr)
{
nbr_nbma->nbr->nbr_nbma = NULL;
nbr_nbma->nbr = NULL;
}
nbr_nbma->oi = NULL;
listnode_delete (oi->nbr_nbma, nbr_nbma);
}
/* send Neighbor event KillNbr to all associated neighbors. */
for (rn = route_top (oi->nbrs); rn; rn = route_next (rn))
if ((nbr = rn->info) != NULL)
if (nbr != oi->nbr_self)
OSPF_NSM_EVENT_EXECUTE (nbr, NSM_KillNbr);
/* Cleanup Link State Acknowlegdment list. */
for (node = listhead (oi->ls_ack); node; nextnode (node))
ospf_lsa_unlock (node->data);
list_delete_all_node (oi->ls_ack);
oi->crypt_seqnum = 0;
/* Empty link state update queue */
ospf_ls_upd_queue_empty (oi);
/* Handle pseudo neighbor. */
ospf_nbr_delete (oi->nbr_self);
oi->nbr_self = ospf_nbr_new (oi);
oi->nbr_self->state = NSM_TwoWay;
oi->nbr_self->priority = OSPF_IF_PARAM (oi, priority);
switch (oi->area->external_routing)
{
case OSPF_AREA_DEFAULT:
SET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_STUB:
UNSET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
break;
case OSPF_AREA_NSSA:
UNSET_FLAG (oi->nbr_self->options, OSPF_OPTION_E);
SET_FLAG (oi->nbr_self->options, OSPF_OPTION_NP);
break;
}
ospf_lsa_unlock (oi->network_lsa_self);
oi->network_lsa_self = NULL;
OSPF_TIMER_OFF (oi->t_network_lsa_self);
}
