C++ IF_OIFS函数代码示例

static int
ospf_interface_delete (int command, struct zclient *zclient,
                       zebra_size_t length)
{
  struct interface *ifp;
  struct stream *s;
  struct route_node *rn;

  s = zclient->ibuf;
  /* zebra_interface_state_read() updates interface structure in iflist */
  ifp = zebra_interface_state_read (s);

  if (ifp == NULL)
    return 0;

  if (if_is_up (ifp))
    zlog_warn ("Zebra: got delete of %s, but interface is still up",
               ifp->name);

  if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
    zlog_debug
      ("Zebra: interface delete %s index %d flags %llx metric %d mtu %d",
       ifp->name, ifp->ifindex, (unsigned long long)ifp->flags, ifp->metric, ifp->mtu);

#ifdef HAVE_SNMP
  ospf_snmp_if_delete (ifp);
#endif /* HAVE_SNMP */

  for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn))
    if (rn->info)
      ospf_if_free ((struct ospf_interface *) rn->info);

  ifp->ifindex = IFINDEX_INTERNAL;
  return 0;
}

static int
ospf_interface_state_down (int command, struct zclient *zclient,
                           zebra_size_t length)
{
  struct interface *ifp;
  struct ospf_interface *oi;
  struct route_node *node;

  ifp = zebra_interface_state_read (zclient->ibuf);

  if (ifp == NULL)
    return 0;

  if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
    zlog_debug ("Zebra: Interface[%s] state change to down.", ifp->name);

  for (node = route_top (IF_OIFS (ifp)); node; node = route_next (node))
    {
      if ((oi = node->info) == NULL)
        continue;
      ospf_if_down (oi);
    }

  return 0;
}

static int
ospf_interface_address_delete (int command, struct zclient *zclient,
                               zebra_size_t length)
{
  struct ospf *ospf;
  struct connected *c;
  struct interface *ifp;
  struct ospf_interface *oi;
  struct route_node *rn;
  struct prefix p;

  c = zebra_interface_address_read (command, zclient->ibuf);

  if (c == NULL)
    return 0;

  if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
    {
      char buf[128];
      prefix2str(c->address, buf, sizeof(buf));
      zlog_debug("Zebra: interface %s address delete %s", c->ifp->name, buf);
    }

  ifp = c->ifp;
  p = *c->address;
  p.prefixlen = IPV4_MAX_PREFIXLEN;

  rn = route_node_lookup (IF_OIFS (ifp), &p);
  if (!rn)
    {
      connected_free (c);
      return 0;
    }

  assert (rn->info);
  oi = rn->info;

  /* Call interface hook functions to clean up */
  ospf_if_free (oi);

#ifdef HAVE_SNMP
  ospf_snmp_if_update (c->ifp);
#endif /* HAVE_SNMP */

  connected_free (c);

  ospf = ospf_lookup ();
  if (ospf != NULL)
    ospf_if_update (ospf);

  return 0;
}

void
ospf_add_to_if (struct interface *ifp, struct ospf_interface *oi)
{
  struct route_node *rn;
  struct prefix p;

  p = *oi->address;
  p.prefixlen = IPV4_MAX_PREFIXLEN;

  rn = route_node_get (IF_OIFS (ifp), &p);
  assert (! rn->info);
  rn->info = oi;
}

void ospf_if_update_params(struct interface *ifp, struct in_addr addr)
{
	struct route_node *rn;
	struct ospf_interface *oi;

	for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) {
		if ((oi = rn->info) == NULL)
			continue;

		if (IPV4_ADDR_SAME(&oi->address->u.prefix4, &addr))
			oi->params =
			    ospf_lookup_if_params(ifp, oi->address->u.prefix4);
	}
}

/* Simulate down/up on the interface.  This is needed, for example, when 
   the MTU changes. */
void ospf_if_reset(struct interface *ifp)
{
	struct route_node *rn;

	for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) {
		struct ospf_interface *oi;

		if ((oi = rn->info) == NULL)
			continue;

		ospf_if_down(oi);
		ospf_if_up(oi);
	}
}

int
ospf_if_delete_hook (struct interface *ifp)
{
  int rc = 0;
#ifdef HAVE_OPAQUE_LSA
  rc = ospf_opaque_del_if (ifp);
#endif /* HAVE_OPAQUE_LSA */
  route_table_finish (IF_OIFS (ifp));
  route_table_finish (IF_OIFS_PARAMS (ifp));
  XFREE (MTYPE_OSPF_IF_INFO, ifp->info);
  ifp->info = NULL;

  return rc;
}

static void ospf_add_to_if(struct interface *ifp, struct ospf_interface *oi)
{
	struct route_node *rn;
	struct prefix p;

	p = *oi->address;
	p.prefixlen = IPV4_MAX_PREFIXLEN;

	rn = route_node_get(IF_OIFS(ifp), &p);
	/* rn->info should either be NULL or equal to this oi
	 * as route_node_get may return an existing node
	 */
	assert(!rn->info || rn->info == oi);
	rn->info = oi;
}

static void
ospf_delete_from_if (struct interface *ifp, struct ospf_interface *oi)
{
  struct route_node *rn;
  struct prefix p;

  p = *oi->address;
  p.prefixlen = IPV4_MAX_PREFIXLEN;

  rn = route_node_lookup (IF_OIFS (oi->ifp), &p);
  assert (rn);
  assert (rn->info);
  rn->info = NULL;
  route_unlock_node (rn);
  route_unlock_node (rn);
}

int
ospf_if_new_hook (struct interface *ifp)
{
  int rc = 0;

  ifp->info = XMALLOC (MTYPE_OSPF_IF_INFO, sizeof (struct ospf_if_info));
  memset (ifp->info, 0, sizeof (struct ospf_if_info));
  
  IF_OIFS (ifp) = route_table_init ();
  IF_OIFS_PARAMS (ifp) = route_table_init ();
  
  IF_DEF_PARAMS (ifp) = ospf_new_if_params ();
  
  SET_IF_PARAM (IF_DEF_PARAMS (ifp), transmit_delay);
  IF_DEF_PARAMS (ifp)->transmit_delay = OSPF_TRANSMIT_DELAY_DEFAULT;
  
  SET_IF_PARAM (IF_DEF_PARAMS (ifp), retransmit_interval);
  IF_DEF_PARAMS (ifp)->retransmit_interval = OSPF_RETRANSMIT_INTERVAL_DEFAULT;

  SET_IF_PARAM (IF_DEF_PARAMS (ifp), priority);
  IF_DEF_PARAMS (ifp)->priority = OSPF_ROUTER_PRIORITY_DEFAULT;

  IF_DEF_PARAMS (ifp)->mtu_ignore = OSPF_MTU_IGNORE_DEFAULT;

  SET_IF_PARAM (IF_DEF_PARAMS (ifp), passive_interface);
  IF_DEF_PARAMS (ifp)->passive_interface = OSPF_IF_ACTIVE;

  SET_IF_PARAM (IF_DEF_PARAMS (ifp), v_hello);
  IF_DEF_PARAMS (ifp)->v_hello = OSPF_HELLO_INTERVAL_DEFAULT;

  SET_IF_PARAM (IF_DEF_PARAMS (ifp), fast_hello);
  IF_DEF_PARAMS (ifp)->fast_hello = OSPF_FAST_HELLO_DEFAULT;

  SET_IF_PARAM (IF_DEF_PARAMS (ifp), v_wait);
  IF_DEF_PARAMS (ifp)->v_wait = OSPF_ROUTER_DEAD_INTERVAL_DEFAULT;

  SET_IF_PARAM (IF_DEF_PARAMS (ifp), auth_simple);
  memset (IF_DEF_PARAMS (ifp)->auth_simple, 0, OSPF_AUTH_SIMPLE_SIZE);
  
  SET_IF_PARAM (IF_DEF_PARAMS (ifp), auth_type);
  IF_DEF_PARAMS (ifp)->auth_type = OSPF_AUTH_NOTSET;
  
#ifdef HAVE_OPAQUE_LSA
  rc = ospf_opaque_new_if (ifp);
#endif /* HAVE_OPAQUE_LSA */
  return rc;
}

/* lookup oi for specified prefix/ifp */
struct ospf_interface *ospf_if_table_lookup(struct interface *ifp,
					    struct prefix *prefix)
{
	struct prefix p;
	struct route_node *rn;
	struct ospf_interface *rninfo = NULL;

	p = *prefix;
	p.prefixlen = IPV4_MAX_PREFIXLEN;

	/* route_node_get implicitely locks */
	if ((rn = route_node_lookup(IF_OIFS(ifp), &p))) {
		rninfo = (struct ospf_interface *)rn->info;
		route_unlock_node(rn);
	}

	return rninfo;
}

static int
ospf_if_delete_hook (struct interface *ifp)
{
  int rc = 0;
  struct route_node *rn;
  rc = ospf_opaque_del_if (ifp);

  route_table_finish (IF_OIFS (ifp));

  for (rn = route_top (IF_OIFS_PARAMS (ifp)); rn; rn = route_next (rn))
    if (rn->info)
      ospf_del_if_params (rn->info);
  route_table_finish (IF_OIFS_PARAMS (ifp));

  ospf_del_if_params ((struct ospf_if_params *) IF_DEF_PARAMS (ifp));
  XFREE (MTYPE_OSPF_IF_INFO, ifp->info);
  ifp->info = NULL;

  return rc;
}

void ospf_if_recalculate_output_cost(struct interface *ifp)
{
	u_int32_t newcost;
	struct route_node *rn;

	for (rn = route_top(IF_OIFS(ifp)); rn; rn = route_next(rn)) {
		struct ospf_interface *oi;

		if ((oi = rn->info) == NULL)
			continue;

		newcost = ospf_if_get_output_cost(oi);

		/* Is actual output cost changed? */
		if (oi->output_cost != newcost) {
			oi->output_cost = newcost;
			ospf_router_lsa_update_area(oi->area);
		}
	}
}

/* determine receiving interface by ifp and source address */
struct ospf_interface *
ospf_if_lookup_recv_if (struct ospf *ospf, struct in_addr src,
			struct interface *ifp)
{
  struct route_node *rn;
  struct prefix_ipv4 addr;
  struct ospf_interface *oi, *match;

  addr.family = AF_INET;
  addr.prefix = src;
  addr.prefixlen = IPV4_MAX_BITLEN;

  match = NULL;

  for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn))
    {
      oi = rn->info;

      if (!oi) /* oi can be NULL for PtP aliases */
	continue;

      if (oi->type == OSPF_IFTYPE_VIRTUALLINK)
	continue;

      if (if_is_loopback (oi->ifp))
        continue;

      if (prefix_match (CONNECTED_PREFIX(oi->connected),
      			(struct prefix *) &addr))
	{
	  if ( (match == NULL) || 
	       (match->address->prefixlen < oi->address->prefixlen)
	     )
	    match = oi;
	}
    }

  return match;
}

static int
ospf_interface_state_up (int command, struct zclient *zclient,
                         zebra_size_t length)
{
  struct interface *ifp;
  struct ospf_interface *oi;
  struct route_node *rn;

  ifp = zebra_interface_if_lookup (zclient->ibuf);

  if (ifp == NULL)
    return 0;

  /* Interface is already up. */
  if (if_is_operative (ifp))
    {
      /* Temporarily keep ifp values. */
      struct interface if_tmp;
      memcpy (&if_tmp, ifp, sizeof (struct interface));

      zebra_interface_if_set_value (zclient->ibuf, ifp);

      if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
        zlog_debug ("Zebra: Interface[%s] state update.", ifp->name);

      if (if_tmp.bandwidth != ifp->bandwidth)
        {
          if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
            zlog_debug ("Zebra: Interface[%s] bandwidth change %d -> %d.",
                       ifp->name, if_tmp.bandwidth, ifp->bandwidth);

          ospf_if_recalculate_output_cost (ifp);
        }

      if (if_tmp.mtu != ifp->mtu)
        {
          if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
            zlog_debug ("Zebra: Interface[%s] MTU change %u -> %u.",
                       ifp->name, if_tmp.mtu, ifp->mtu);

	  /* Must reset the interface (simulate down/up) when MTU changes. */
          ospf_if_reset(ifp);
	}
      return 0;
    }

  zebra_interface_if_set_value (zclient->ibuf, ifp);

  if (IS_DEBUG_OSPF (zebra, ZEBRA_INTERFACE))
    zlog_debug ("Zebra: Interface[%s] state change to up.", ifp->name);

  for (rn = route_top (IF_OIFS (ifp)); rn; rn = route_next (rn))
    {
      if ((oi = rn->info) == NULL)
        continue;

      ospf_if_up (oi);
    }

  return 0;
}