ospf_abr.c
上传用户:xiaozhuqw
上传日期:2009-11-15
资源大小:1338k
文件大小:43k
- /*
- * OSPF ABR functions.
- * Copyright (C) 1999, 2000 Alex Zinin, Toshiaki Takada
- *
- * This file is part of GNU Zebra.
- *
- * GNU Zebra is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * GNU Zebra is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with GNU Zebra; see the file COPYING. If not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
- */
- #include <zebra.h>
- #include "thread.h"
- #include "memory.h"
- #include "linklist.h"
- #include "prefix.h"
- #include "if.h"
- #include "table.h"
- #include "vty.h"
- #include "filter.h"
- #include "plist.h"
- #include "log.h"
- #include "ospfd/ospfd.h"
- #include "ospfd/ospf_interface.h"
- #include "ospfd/ospf_ism.h"
- #include "ospfd/ospf_asbr.h"
- #include "ospfd/ospf_lsa.h"
- #include "ospfd/ospf_lsdb.h"
- #include "ospfd/ospf_neighbor.h"
- #include "ospfd/ospf_nsm.h"
- #include "ospfd/ospf_spf.h"
- #include "ospfd/ospf_route.h"
- #include "ospfd/ospf_ia.h"
- #include "ospfd/ospf_flood.h"
- #include "ospfd/ospf_abr.h"
- #include "ospfd/ospf_ase.h"
- #include "ospfd/ospf_zebra.h"
- #include "ospfd/ospf_dump.h"
- struct ospf_area_range *
- ospf_area_range_new (struct prefix_ipv4 *p)
- {
- struct ospf_area_range *range;
- range = XCALLOC (MTYPE_OSPF_AREA_RANGE, sizeof (struct ospf_area_range));
- range->addr = p->prefix;
- range->masklen = p->prefixlen;
- range->cost_config = OSPF_AREA_RANGE_COST_UNSPEC;
- return range;
- }
- void
- ospf_area_range_free (struct ospf_area_range *range)
- {
- XFREE (MTYPE_OSPF_AREA_RANGE, range);
- }
- void
- ospf_area_range_add (struct ospf_area *area, struct ospf_area_range *range)
- {
- struct route_node *rn;
- struct prefix_ipv4 p;
- p.family = AF_INET;
- p.prefixlen = range->masklen;
- p.prefix = range->addr;
- rn = route_node_get (area->ranges, (struct prefix *)&p);
- if (rn->info)
- route_unlock_node (rn);
- else
- rn->info = range;
- }
- void
- ospf_area_range_delete (struct ospf_area *area, struct ospf_area_range *range)
- {
- struct route_node *rn;
- struct prefix_ipv4 p;
- p.family = AF_INET;
- p.prefixlen = range->masklen;
- p.prefix = range->addr;
- rn = route_node_lookup (area->ranges, (struct prefix *)&p);
- if (rn)
- {
- ospf_area_range_free (rn->info);
- rn->info = NULL;
- route_unlock_node (rn);
- route_unlock_node (rn);
- }
- }
- struct ospf_area_range *
- ospf_area_range_lookup (struct ospf_area *area, struct prefix_ipv4 *p)
- {
- struct route_node *rn;
- rn = route_node_lookup (area->ranges, (struct prefix *)p);
- if (rn)
- {
- route_unlock_node (rn);
- return rn->info;
- }
- return NULL;
- }
- struct ospf_area_range *
- ospf_area_range_lookup_next (struct ospf_area *area, struct in_addr *range_net,
- int first)
- {
- struct route_node *rn;
- struct prefix_ipv4 p;
- struct ospf_area_range *find;
- p.family = AF_INET;
- p.prefixlen = IPV4_MAX_BITLEN;
- p.prefix = *range_net;
- if (first)
- rn = route_top (area->ranges);
- else
- {
- rn = route_node_get (area->ranges, (struct prefix *) &p);
- rn = route_next (rn);
- }
- for (; rn; rn = route_next (rn))
- if (rn->info)
- break;
- if (rn && rn->info)
- {
- find = rn->info;
- *range_net = rn->p.u.prefix4;
- route_unlock_node (rn);
- return find;
- }
- return NULL;
- }
- struct ospf_area_range *
- ospf_area_range_match (struct ospf_area *area, struct prefix_ipv4 *p)
- {
- struct route_node *node;
- node = route_node_match (area->ranges, (struct prefix *) p);
- if (node)
- {
- route_unlock_node (node);
- return node->info;
- }
- return NULL;
- }
- struct ospf_area_range *
- ospf_area_range_match_any (struct ospf *ospf, struct prefix_ipv4 *p)
- {
- struct ospf_area_range *range;
- listnode node;
- for (node = listhead (ospf->areas); node; nextnode (node))
- if ((range = ospf_area_range_match (node->data, p)))
- return range;
- return NULL;
- }
- int
- ospf_area_range_active (struct ospf_area_range *range)
- {
- return range->specifics;
- }
- int
- ospf_area_actively_attached (struct ospf_area *area)
- {
- return area->act_ints;
- }
- int
- ospf_area_range_set (struct ospf *ospf, struct in_addr area_id,
- struct prefix_ipv4 *p, int advertise)
- {
- struct ospf_area *area;
- struct ospf_area_range *range;
- int ret = OSPF_AREA_ID_FORMAT_ADDRESS;
- area = ospf_area_get (ospf, area_id, ret);
- if (area == NULL)
- return 0;
- range = ospf_area_range_lookup (area, p);
- if (range != NULL)
- {
- if ((CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE)
- && !CHECK_FLAG (advertise, OSPF_AREA_RANGE_ADVERTISE))
- || (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE)
- && CHECK_FLAG (advertise, OSPF_AREA_RANGE_ADVERTISE)))
- ospf_schedule_abr_task (ospf);
- }
- else
- {
- range = ospf_area_range_new (p);
- ospf_area_range_add (area, range);
- ospf_schedule_abr_task (ospf);
- }
- if (CHECK_FLAG (advertise, OSPF_AREA_RANGE_ADVERTISE))
- SET_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE);
- else
- UNSET_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE);
- return 1;
- }
- int
- ospf_area_range_cost_set (struct ospf *ospf, struct in_addr area_id,
- struct prefix_ipv4 *p, u_int32_t cost)
- {
- struct ospf_area *area;
- struct ospf_area_range *range;
- int ret = OSPF_AREA_ID_FORMAT_ADDRESS;
- area = ospf_area_get (ospf, area_id, ret);
- if (area == NULL)
- return 0;
- range = ospf_area_range_new (p);
- if (range == NULL)
- return 0;
- if (range->cost_config != cost)
- {
- range->cost_config = cost;
- if (ospf_area_range_active (range))
- ospf_schedule_abr_task (ospf);
- }
- return 1;
- }
- int
- ospf_area_range_unset (struct ospf *ospf, struct in_addr area_id,
- struct prefix_ipv4 *p)
- {
- struct ospf_area *area;
- struct ospf_area_range *range;
- area = ospf_area_lookup_by_area_id (ospf, area_id);
- if (area == NULL)
- return 0;
- range = ospf_area_range_lookup (area, p);
- if (range == NULL)
- return 0;
- if (ospf_area_range_active (range))
- ospf_schedule_abr_task (ospf);
- ospf_area_range_delete (area, range);
- return 1;
- }
- int
- ospf_area_range_substitute_set (struct ospf *ospf, struct in_addr area_id,
- struct prefix_ipv4 *p, struct prefix_ipv4 *s)
- {
- struct ospf_area *area;
- struct ospf_area_range *range;
- int ret = OSPF_AREA_ID_FORMAT_ADDRESS;
- area = ospf_area_get (ospf, area_id, ret);
- range = ospf_area_range_lookup (area, p);
- if (range != NULL)
- {
- if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE) ||
- !CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE))
- ospf_schedule_abr_task (ospf);
- }
- else
- {
- range = ospf_area_range_new (p);
- ospf_area_range_add (area, range);
- ospf_schedule_abr_task (ospf);
- }
- SET_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE);
- SET_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE);
- range->subst_addr = s->prefix;
- range->subst_masklen = s->prefixlen;
- return 1;
- }
- int
- ospf_area_range_substitute_unset (struct ospf *ospf, struct in_addr area_id,
- struct prefix_ipv4 *p)
- {
- struct ospf_area *area;
- struct ospf_area_range *range;
- area = ospf_area_lookup_by_area_id (ospf, area_id);
- if (area == NULL)
- return 0;
- range = ospf_area_range_lookup (area, p);
- if (range == NULL)
- return 0;
- if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE))
- if (ospf_area_range_active (range))
- ospf_schedule_abr_task (ospf);
- UNSET_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE);
- range->subst_addr.s_addr = 0;
- range->subst_masklen = 0;
- return 1;
- }
- int
- ospf_act_bb_connection (struct ospf *ospf)
- {
- if (ospf->backbone == NULL)
- return 0;
- return ospf->backbone->full_nbrs;
- }
- /* Check area border router status. */
- void
- ospf_check_abr_status (struct ospf *ospf)
- {
- struct ospf_area *area;
- listnode node;
- int bb_configured = 0;
- int bb_act_attached = 0;
- int areas_configured = 0;
- int areas_act_attached = 0;
- u_char new_flags = ospf->flags;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_check_abr_status(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (listcount (area->oiflist))
- {
- areas_configured++;
-
- if (OSPF_IS_AREA_BACKBONE (area))
- bb_configured = 1;
- }
- if (ospf_area_actively_attached (area))
- {
- areas_act_attached++;
-
- if (OSPF_IS_AREA_BACKBONE (area))
- bb_act_attached = 1;
- }
- }
- if (IS_DEBUG_OSPF_EVENT)
- {
- zlog_info ("ospf_check_abr_status(): looked through areas");
- zlog_info ("ospf_check_abr_status(): bb_configured: %d", bb_configured);
- zlog_info ("ospf_check_abr_status(): bb_act_attached: %d",
- bb_act_attached);
- zlog_info ("ospf_check_abr_status(): areas_configured: %d",
- areas_configured);
- zlog_info ("ospf_check_abr_status(): areas_act_attached: %d",
- areas_act_attached);
- }
- switch (ospf->abr_type)
- {
- case OSPF_ABR_SHORTCUT:
- case OSPF_ABR_STAND:
- if (areas_act_attached > 1)
- SET_FLAG (new_flags, OSPF_FLAG_ABR);
- else
- UNSET_FLAG (new_flags, OSPF_FLAG_ABR);
- break;
- case OSPF_ABR_IBM:
- if ((areas_act_attached > 1) && bb_configured)
- SET_FLAG (new_flags, OSPF_FLAG_ABR);
- else
- UNSET_FLAG (new_flags, OSPF_FLAG_ABR);
- break;
- case OSPF_ABR_CISCO:
- if ((areas_configured > 1) && bb_act_attached)
- SET_FLAG (new_flags, OSPF_FLAG_ABR);
- else
- UNSET_FLAG (new_flags, OSPF_FLAG_ABR);
- break;
- default:
- break;
- }
- if (new_flags != ospf->flags)
- {
- ospf_spf_calculate_schedule (ospf);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_check_abr_status(): new router flags: %x",new_flags);
- ospf->flags = new_flags;
- OSPF_TIMER_ON (ospf->t_router_lsa_update,
- ospf_router_lsa_update_timer, OSPF_LSA_UPDATE_DELAY);
- }
- }
- void
- ospf_abr_update_aggregate (struct ospf_area_range *range,
- struct ospf_route *or)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_update_aggregate(): Start");
- if (range->cost_config != -1)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_update_aggregate(): use configured cost %d",
- range->cost_config);
- range->cost = range->cost_config;
- }
- else
- {
- if (range->specifics == 0)
- range->cost = or->cost; /* 1st time get 1st cost */
- if (or->cost > range->cost)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_update_aggregate(): largest cost, update");
- range->cost = or->cost;
- }
- }
- range->specifics++;
- }
- static void
- set_metric (struct ospf_lsa *lsa, u_int32_t metric)
- {
- struct summary_lsa *header;
- u_char *mp;
- metric = htonl (metric);
- mp = (char *) &metric;
- mp++;
- header = (struct summary_lsa *) lsa->data;
- memcpy(header->metric, mp, 3);
- }
- #ifdef HAVE_NSSA
- int
- ospf_abr_check_nssa_range (struct prefix_ipv4 *p, u_int32_t cost,
- struct ospf_area *area)
- {
- /* The Type-7 is tested against the aggregated prefix and forwarded
- for lsa installation and flooding */
- return 0;
- }
- /* ospf_abr_translate_nssa */
- int
- ospf_abr_translate_nssa (struct ospf_area *area, struct ospf_lsa *lsa)
- {
- /* Incoming Type-7 or later aggregated Type-7
- LSA is skipped if P-bit is off.
- LSA is aggregated if within range.
- The Type-7 is translated, Installed/Approved as a Type-5 into
- global LSDB, then Flooded through AS
- Later, any Unapproved Translated Type-5's are flushed/discarded */
- struct ospf_lsa *dup;
- if (! CHECK_FLAG (lsa->data->options, OSPF_OPTION_NP))
- {
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa(): P-bit off, NO Translation");
- return 0;
- }
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa(): TRANSLATING 7 to 5");
- /* No more P-bit. */
- /* UNSET_FLAG (lsa->data->options, OSPF_OPTION_NP); */
- /* Area where Aggregate testing will be inserted, just like summary
- advertisements */
- /* ospf_abr_check_nssa_range (p_arg, lsa-> cost, lsa -> area); */
- /* Follow thru here means no aggregation */
- dup = ospf_lsa_dup (lsa); /* keep LSDB intact, lock = 1 */
- SET_FLAG (dup->flags, OSPF_LSA_LOCAL_XLT); /* Translated from 7 */
- SET_FLAG (dup->flags, OSPF_LSA_APPROVED); /* So, do not remove it */
- dup->data->type = OSPF_AS_EXTERNAL_LSA; /* make Type-5 */
- ospf_lsa_checksum (dup->data);
- ospf_lsa_install (area->ospf, NULL, dup); /* Install this Type-5 into LSDB, Lock = 2. */
- ospf_flood_through_as (area->ospf, NULL, dup); /* flood non-NSSA/STUB areas */
-
- /* This translated Type-5 will go to all non-NSSA areas connected to
- this ABR; The Type-5 could come from any of the NSSA's connected
- to this ABR. */
- return 0;
- }
- void
- ospf_abr_translate_nssa_range (struct prefix_ipv4 *p, u_int32_t cost)
- {
- /* The Type-7 is created from the aggregated prefix and forwarded
- for lsa installation and flooding... to be added... */
- }
- #endif /* HAVE_NSSA */
- void
- ospf_abr_announce_network_to_area (struct prefix_ipv4 *p, u_int32_t cost,
- struct ospf_area *area)
- {
- struct ospf_lsa *lsa, *old = NULL;
- struct summary_lsa *sl = NULL;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): Start");
- old = ospf_lsa_lookup_by_prefix (area->lsdb, OSPF_SUMMARY_LSA, p,
- area->ospf->router_id);
- if (old)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): old summary found");
- sl = (struct summary_lsa *) old->data;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): "
- "old metric: %d, new metric: %d",
- GET_METRIC (sl->metric), cost);
- }
- if (old && (GET_METRIC (sl->metric) == cost))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): "
- "old summary approved");
- SET_FLAG (old->flags, OSPF_LSA_APPROVED);
- }
- else
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): "
- "creating new summary");
- if (old)
- {
- set_metric (old, cost);
- lsa = ospf_summary_lsa_refresh (area->ospf, old);
- /* This will flood through area. */
- }
- else
- {
- lsa = ospf_summary_lsa_originate (p, cost, area);
- /* This will flood through area. */
- }
-
- SET_FLAG (lsa->flags, OSPF_LSA_APPROVED);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): "
- "flooding new version of summary");
- #ifndef HAVE_NSSA
- ospf_flood_through_area (area, NULL, lsa);
- #endif /* ! HAVE_NSSA */
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): Stop");
- }
- int
- ospf_abr_nexthops_belong_to_area (struct ospf_route *or,
- struct ospf_area *area)
- {
- listnode node;
- for (node = listhead (or->path); node; nextnode (node))
- {
- struct ospf_path *path = node->data;
- struct ospf_interface *oi = path->oi;
- if (oi != NULL)
- if (oi->area == area)
- return 1;
- }
- return 0;
- }
- int
- ospf_abr_should_accept (struct prefix *p, struct ospf_area *area)
- {
- if (IMPORT_NAME (area))
- {
- if (IMPORT_LIST (area) == NULL)
- IMPORT_LIST (area) = access_list_lookup (AFI_IP, IMPORT_NAME (area));
- if (IMPORT_LIST (area))
- if (access_list_apply (IMPORT_LIST (area), p) == FILTER_DENY)
- return 0;
- }
- return 1;
- }
- int
- ospf_abr_plist_in_check (struct ospf_area *area, struct ospf_route *or,
- struct prefix *p)
- {
- if (PREFIX_NAME_IN (area))
- {
- if (PREFIX_LIST_IN (area) == NULL)
- PREFIX_LIST_IN (area) = prefix_list_lookup (AFI_IP,
- PREFIX_NAME_IN (area));
- if (PREFIX_LIST_IN (area))
- if (prefix_list_apply (PREFIX_LIST_IN (area), p) != PREFIX_PERMIT)
- return 0;
- }
- return 1;
- }
- int
- ospf_abr_plist_out_check (struct ospf_area *area, struct ospf_route *or,
- struct prefix *p)
- {
- if (PREFIX_NAME_OUT (area))
- {
- if (PREFIX_LIST_OUT (area) == NULL)
- PREFIX_LIST_OUT (area) = prefix_list_lookup (AFI_IP,
- PREFIX_NAME_OUT (area));
- if (PREFIX_LIST_OUT (area))
- if (prefix_list_apply (PREFIX_LIST_OUT (area), p) != PREFIX_PERMIT)
- return 0;
- }
- return 1;
- }
- void
- ospf_abr_announce_network (struct ospf *ospf,
- struct route_node *n, struct ospf_route *or)
- {
- struct ospf_area_range *range;
- struct ospf_area *area, *or_area;
- struct prefix_ipv4 *p;
- listnode node;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): Start");
- p = (struct prefix_ipv4 *) &n->p;
- or_area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id);
- assert (or_area);
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): looking at area %s",
- inet_ntoa (area->area_id));
- if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id))
- continue;
- if (ospf_abr_nexthops_belong_to_area (or, area))
- continue;
- if (!ospf_abr_should_accept (&n->p, area))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): "
- "prefix %s/%d was denied by import-list",
- inet_ntoa (p->prefix), p->prefixlen);
- continue;
- }
- if (!ospf_abr_plist_in_check (area, or, &n->p))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): "
- "prefix %s/%d was denied by prefix-list",
- inet_ntoa (p->prefix), p->prefixlen);
- continue;
- }
- if (area->external_routing != OSPF_AREA_DEFAULT && area->no_summary)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): "
- "area %s is stub and no_summary",
- inet_ntoa (area->area_id));
- continue;
- }
- if (or->path_type == OSPF_PATH_INTER_AREA)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): this is "
- "inter-area route to %s/%d",
- inet_ntoa (p->prefix), p->prefixlen);
- if (!OSPF_IS_AREA_BACKBONE (area))
- ospf_abr_announce_network_to_area (p, or->cost, area);
- }
- if (or->path_type == OSPF_PATH_INTRA_AREA)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): "
- "this is intra-area route to %s/%d",
- inet_ntoa (p->prefix), p->prefixlen);
- if ((range = ospf_area_range_match (or_area, p)) &&
- !ospf_area_is_transit (area))
- ospf_abr_update_aggregate (range, or);
- else
- ospf_abr_announce_network_to_area (p, or->cost, area);
- }
- }
- }
- int
- ospf_abr_should_announce (struct ospf *ospf,
- struct prefix *p, struct ospf_route *or)
- {
- struct ospf_area *area;
- area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id);
- assert (area);
-
- if (EXPORT_NAME (area))
- {
- if (EXPORT_LIST (area) == NULL)
- EXPORT_LIST (area) = access_list_lookup (AFI_IP, EXPORT_NAME (area));
- if (EXPORT_LIST (area))
- if (access_list_apply (EXPORT_LIST (area), p) == FILTER_DENY)
- return 0;
- }
- return 1;
- }
- #ifdef HAVE_NSSA
- void
- ospf_abr_process_nssa_translates (struct ospf *ospf)
- {
- /* Scan through all NSSA_LSDB records for all areas;
- If P-bit is on, translate all Type-7's to 5's and aggregate or
- flood install as approved in Type-5 LSDB with XLATE Flag on
- later, do same for all aggregates... At end, DISCARD all
- remaining UNAPPROVED Type-5's (Aggregate is for future ) */
- listnode node;
- struct ospf_area *area;
- struct route_node *rn;
- struct ospf_lsa *lsa;
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_process_nssa_translates(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (! area->NSSATranslator)
- continue; /* skip if not translator */
-
- if (area->external_routing != OSPF_AREA_NSSA)
- continue; /* skip if not Nssa Area */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_process_nssa_translates(): "
- "looking at area %s", inet_ntoa (area->area_id));
-
- LSDB_LOOP (NSSA_LSDB (area), rn, lsa)
- ospf_abr_translate_nssa (area, lsa);
- }
-
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_process_nssa_translates(): Stop");
- }
- #endif /* HAVE_NSSA */
- void
- ospf_abr_process_network_rt (struct ospf *ospf,
- struct route_table *rt)
- {
- struct ospf_area *area;
- struct ospf_route *or;
- struct route_node *rn;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): Start");
- for (rn = route_top (rt); rn; rn = route_next (rn))
- {
- if ((or = rn->info) == NULL)
- continue;
- if (!(area = ospf_area_lookup_by_area_id (ospf, or->u.std.area_id)))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): area %s no longer exists",
- inet_ntoa (or->u.std.area_id));
- continue;
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): this is a route to %s/%d",
- inet_ntoa (rn->p.u.prefix4), rn->p.prefixlen);
- if (or->path_type >= OSPF_PATH_TYPE1_EXTERNAL)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): "
- "this is an External router, skipping");
- continue;
- }
- if (or->cost >= OSPF_LS_INFINITY)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt():"
- " this route's cost is infinity, skipping");
- continue;
- }
- if (or->type == OSPF_DESTINATION_DISCARD)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt():"
- " this is a discard entry, skipping");
- continue;
- }
- if (or->path_type == OSPF_PATH_INTRA_AREA &&
- !ospf_abr_should_announce (ospf, &rn->p, or))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info("ospf_abr_process_network_rt(): denied by export-list");
- continue;
- }
- if (or->path_type == OSPF_PATH_INTRA_AREA &&
- !ospf_abr_plist_out_check (area, or, &rn->p))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info("ospf_abr_process_network_rt(): denied by prefix-list");
- continue;
- }
- if ((or->path_type == OSPF_PATH_INTER_AREA) &&
- !OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt():"
- " this is route is not backbone one, skipping");
- continue;
- }
- if ((ospf->abr_type == OSPF_ABR_CISCO) ||
- (ospf->abr_type == OSPF_ABR_IBM))
- if (!ospf_act_bb_connection (ospf) &&
- or->path_type != OSPF_PATH_INTRA_AREA)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): ALT ABR: "
- "No BB connection, skip not intra-area routes");
- continue;
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): announcing");
- ospf_abr_announce_network (ospf, rn, or);
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_network_rt(): Stop");
- }
- void
- ospf_abr_announce_rtr_to_area (struct prefix_ipv4 *p, u_int32_t cost,
- struct ospf_area *area)
- {
- struct ospf_lsa *lsa, *old = NULL;
- struct summary_lsa *slsa = NULL;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr_to_area(): Start");
- old = ospf_lsa_lookup_by_prefix (area->lsdb, OSPF_ASBR_SUMMARY_LSA,
- p, area->ospf->router_id);
- if (old)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr_to_area(): old summary found");
- slsa = (struct summary_lsa *) old->data;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network_to_area(): "
- "old metric: %d, new metric: %d",
- GET_METRIC (slsa->metric), cost);
- }
- if (old && (GET_METRIC (slsa->metric) == cost))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr_to_area(): old summary approved");
- SET_FLAG (old->flags, OSPF_LSA_APPROVED);
- }
- else
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr_to_area(): 2.2");
-
- if (old)
- {
- set_metric (old, cost);
- lsa = ospf_summary_asbr_lsa_refresh (area->ospf, old);
- }
- else
- lsa = ospf_summary_asbr_lsa_originate (p, cost, area);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr_to_area(): "
- "flooding new version of summary");
- /*
- zlog_info ("ospf_abr_announce_rtr_to_area(): creating new summary");
- lsa = ospf_summary_asbr_lsa (p, cost, area, old); */
- SET_FLAG (lsa->flags, OSPF_LSA_APPROVED);
- /* ospf_flood_through_area (area, NULL, lsa);*/
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr_to_area(): Stop");
- }
- void
- ospf_abr_announce_rtr (struct ospf *ospf,
- struct prefix_ipv4 *p, struct ospf_route *or)
- {
- listnode node;
- struct ospf_area *area;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr(): looking at area %s",
- inet_ntoa (area->area_id));
- if (IPV4_ADDR_SAME (&or->u.std.area_id, &area->area_id))
- continue;
- if (ospf_abr_nexthops_belong_to_area (or, area))
- continue;
- if (area->external_routing != OSPF_AREA_DEFAULT)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_network(): "
- "area %s doesn't support external routing",
- inet_ntoa(area->area_id));
- continue;
- }
- if (or->path_type == OSPF_PATH_INTER_AREA)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr(): "
- "this is inter-area route to %s", inet_ntoa (p->prefix));
- if (!OSPF_IS_AREA_BACKBONE (area))
- ospf_abr_announce_rtr_to_area (p, or->cost, area);
- }
- if (or->path_type == OSPF_PATH_INTRA_AREA)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr(): "
- "this is intra-area route to %s", inet_ntoa (p->prefix));
- ospf_abr_announce_rtr_to_area (p, or->cost, area);
- }
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_rtr(): Stop");
- }
- void
- ospf_abr_process_router_rt (struct ospf *ospf, struct route_table *rt)
- {
- struct ospf_route *or;
- struct route_node *rn;
- struct list *l;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): Start");
- for (rn = route_top (rt); rn; rn = route_next (rn))
- {
- listnode node;
- char flag = 0;
- struct ospf_route *best = NULL;
- if (rn->info == NULL)
- continue;
- l = rn->info;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): this is a route to %s",
- inet_ntoa (rn->p.u.prefix4));
- for (node = listhead (l); node; nextnode (node))
- {
- or = getdata (node);
- if (or == NULL)
- continue;
- if (!ospf_area_lookup_by_area_id (ospf, or->u.std.area_id))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): area %s no longer exists",
- inet_ntoa (or->u.std.area_id));
- continue;
- }
- if (!CHECK_FLAG (or->u.std.flags, ROUTER_LSA_EXTERNAL))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): "
- "This is not an ASBR, skipping");
- continue;
- }
- if (!flag)
- {
- best = ospf_find_asbr_route (ospf, rt,
- (struct prefix_ipv4 *) &rn->p);
- flag = 1;
- }
-
- if (best == NULL)
- continue;
-
- if (or != best)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): "
- "This route is not the best among possible, skipping");
- continue;
- }
-
- if (or->path_type == OSPF_PATH_INTER_AREA &&
- !OSPF_IS_AREA_ID_BACKBONE (or->u.std.area_id))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): "
- "This route is not a backbone one, skipping");
- continue;
- }
- if (or->cost >= OSPF_LS_INFINITY)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): "
- "This route has LS_INFINITY metric, skipping");
- continue;
- }
- if (ospf->abr_type == OSPF_ABR_CISCO
- || ospf->abr_type == OSPF_ABR_IBM)
- if (!ospf_act_bb_connection (ospf)
- && or->path_type != OSPF_PATH_INTRA_AREA)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info("ospf_abr_process_network_rt(): ALT ABR: "
- "No BB connection, skip not intra-area routes");
- continue;
- }
- ospf_abr_announce_rtr (ospf, (struct prefix_ipv4 *) &rn->p, or);
- }
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_process_router_rt(): Stop");
- }
- #ifdef HAVE_NSSA
- void
- ospf_abr_unapprove_translates (struct ospf *ospf) /* For NSSA Translations */
- {
- struct ospf_lsa *lsa;
- struct route_node *rn;
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_unapprove_translates(): Start");
- /* NSSA Translator is not checked, because it may have gone away,
- and we would want to flush any residuals anyway */
- LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa)
- if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT))
- UNSET_FLAG (lsa->flags, OSPF_LSA_APPROVED);
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_unapprove_translates(): Stop");
- }
- #endif /* HAVE_NSSA */
- void
- ospf_abr_unapprove_summaries (struct ospf *ospf)
- {
- listnode node;
- struct ospf_area *area;
- struct route_node *rn;
- struct ospf_lsa *lsa;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_unapprove_summaries(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa)
- if (ospf_lsa_is_self_originated (ospf, lsa))
- UNSET_FLAG (lsa->flags, OSPF_LSA_APPROVED);
- LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa)
- if (ospf_lsa_is_self_originated (ospf, lsa))
- UNSET_FLAG (lsa->flags, OSPF_LSA_APPROVED);
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_unapprove_summaries(): Stop");
- }
- void
- ospf_abr_prepare_aggregates (struct ospf *ospf)
- {
- listnode node;
- struct route_node *rn;
- struct ospf_area_range *range;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_prepare_aggregates(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- struct ospf_area *area = getdata (node);
- for (rn = route_top (area->ranges); rn; rn = route_next (rn))
- if ((range = rn->info) != NULL)
- {
- range->cost = 0;
- range->specifics = 0;
- }
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_prepare_aggregates(): Stop");
- }
- void
- ospf_abr_announce_aggregates (struct ospf *ospf)
- {
- struct ospf_area *area, *ar;
- struct ospf_area_range *range;
- struct route_node *rn;
- struct prefix_ipv4 p;
- listnode node, n;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates(): looking at area %s",
- inet_ntoa (area->area_id));
- for (rn = route_top (area->ranges); rn; rn = route_next (rn))
- if ((range = rn->info))
- {
- if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates():"
- " discarding suppress-ranges");
- continue;
- }
- p.family = AF_INET;
- p.prefix = range->addr;
- p.prefixlen = range->masklen;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates():"
- " this is range: %s/%d",
- inet_ntoa (p.prefix), p.prefixlen);
- if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE))
- {
- p.family = AF_INET;
- p.prefix = range->subst_addr;
- p.prefixlen = range->subst_masklen;
- }
- if (range->specifics)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates(): active range");
- for (n = listhead (ospf->areas); n; nextnode (n))
- {
- ar = getdata (n);
- if (ar == area)
- continue;
- /* We do not check nexthops here, because
- intra-area routes can be associated with
- one area only */
- /* backbone routes are not summarized
- when announced into transit areas */
- if (ospf_area_is_transit (ar) &&
- OSPF_IS_AREA_BACKBONE (area))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates(): Skipping "
- "announcement of BB aggregate into"
- " a transit area");
- continue;
- }
- ospf_abr_announce_network_to_area (&p, range->cost, ar);
- }
- }
- }
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_aggregates(): Stop");
- }
- #ifdef HAVE_NSSA
- void
- ospf_abr_send_nssa_aggregates (struct ospf *ospf) /* temporarily turned off */
- {
- listnode node; /*, n; */
- struct ospf_area *area; /*, *ar; */
- struct route_node *rn;
- struct ospf_area_range *range;
- struct prefix_ipv4 p;
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_send_nssa_aggregates(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (! area->NSSATranslator)
- continue;
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_send_nssa_aggregates(): looking at area %s",
- inet_ntoa (area->area_id));
- for (rn = route_top (area->ranges); rn; rn = route_next (rn))
- {
- if (rn->info == NULL)
- continue;
- range = rn->info;
- if (!CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE))
- {
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_send_nssa_aggregates():"
- " discarding suppress-ranges");
- continue;
- }
- p.family = AF_INET;
- p.prefix = range->addr;
- p.prefixlen = range->masklen;
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_send_nssa_aggregates():"
- " this is range: %s/%d",
- inet_ntoa (p.prefix), p.prefixlen);
- if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_SUBSTITUTE))
- {
- p.family = AF_INET;
- p.prefix = range->subst_addr;
- p.prefixlen = range->subst_masklen;
- }
- if (range->specifics)
- {
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_send_nssa_aggregates(): active range");
- /* Fetch LSA-Type-7 from aggregate prefix, and then
- translate, Install (as Type-5), Approve, and Flood */
- ospf_abr_translate_nssa_range (&p, range->cost);
- } /* if (range->specifics)*/
- } /* all area ranges*/
- } /* all areas */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_send_nssa_aggregates(): Stop");
- }
- void
- ospf_abr_announce_nssa_defaults (struct ospf *ospf) /* By ABR-Translator */
- {
- listnode node;
- struct ospf_area *area;
- struct prefix_ipv4 p;
- if (! IS_OSPF_ABR (ospf))
- return;
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_announce_stub_defaults(): Start");
- p.family = AF_INET;
- p.prefix.s_addr = OSPF_DEFAULT_DESTINATION;
- p.prefixlen = 0;
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_announce_nssa_defaults(): looking at area %s",
- inet_ntoa (area->area_id));
- if (area->external_routing != OSPF_AREA_NSSA)
- continue;
- if (OSPF_IS_AREA_BACKBONE (area))
- continue; /* Sanity Check */
- /* if (!TranslatorRole continue V 1.0 look for "always" conf */
- if (area->NSSATranslator)
- {
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_announce_nssa_defaults(): "
- "announcing 0.0.0.0/0 to this nssa");
- /* ospf_abr_announce_nssa_asbr_to_as (&p, area->default_cost, area); */
- }
- }
- }
- #endif /* HAVE_NSSA */
- void
- ospf_abr_announce_stub_defaults (struct ospf *ospf)
- {
- listnode node;
- struct ospf_area *area;
- struct prefix_ipv4 p;
- if (! IS_OSPF_ABR (ospf))
- return;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_stub_defaults(): Start");
- p.family = AF_INET;
- p.prefix.s_addr = OSPF_DEFAULT_DESTINATION;
- p.prefixlen = 0;
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_stub_defaults(): looking at area %s",
- inet_ntoa (area->area_id));
- #ifdef HAVE_NSSA
- if (area->external_routing != OSPF_AREA_STUB)
- #else /* ! HAVE_NSSA */
- if (area->external_routing == OSPF_AREA_DEFAULT)
- #endif /* HAVE_NSSA */
- continue;
- if (OSPF_IS_AREA_BACKBONE (area))
- continue; /* Sanity Check */
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_stub_defaults(): "
- "announcing 0.0.0.0/0 to this area");
- ospf_abr_announce_network_to_area (&p, area->default_cost, area);
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_announce_stub_defaults(): Stop");
- }
- #ifdef HAVE_NSSA
- int
- ospf_abr_remove_unapproved_translates_apply (struct ospf *ospf,
- struct ospf_lsa *lsa)
- {
- if (CHECK_FLAG (lsa->flags, OSPF_LSA_LOCAL_XLT)
- && ! CHECK_FLAG (lsa->flags, OSPF_LSA_APPROVED))
- {
- zlog_info ("ospf_abr_remove_unapproved_translates(): "
- "removing unapproved translates, ID: %s",
- inet_ntoa (lsa->data->id));
- /* FLUSH THROUGHOUT AS */
- ospf_lsa_flush_as (ospf, lsa);
- /* DISCARD from LSDB */
- }
- return 0;
- }
- void
- ospf_abr_remove_unapproved_translates (struct ospf *ospf)
- {
- struct route_node *rn;
- struct ospf_lsa *lsa;
- /* All AREA PROCESS should have APPROVED necessary LSAs */
- /* Remove any left over and not APPROVED */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_remove_unapproved_translates(): Start");
- LSDB_LOOP (EXTERNAL_LSDB (ospf), rn, lsa)
- ospf_abr_remove_unapproved_translates_apply (ospf, lsa);
-
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_remove_unapproved_translates(): Stop");
- }
- #endif /* HAVE_NSSA */
- void
- ospf_abr_remove_unapproved_summaries (struct ospf *ospf)
- {
- listnode node;
- struct ospf_area *area;
- struct route_node *rn;
- struct ospf_lsa *lsa;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_remove_unapproved_summaries(): Start");
- for (node = listhead (ospf->areas); node; nextnode (node))
- {
- area = getdata (node);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_remove_unapproved_summaries(): "
- "looking at area %s", inet_ntoa (area->area_id));
- LSDB_LOOP (SUMMARY_LSDB (area), rn, lsa)
- if (ospf_lsa_is_self_originated (ospf, lsa))
- if (!CHECK_FLAG (lsa->flags, OSPF_LSA_APPROVED))
- ospf_lsa_flush_area (lsa, area);
- LSDB_LOOP (ASBR_SUMMARY_LSDB (area), rn, lsa)
- if (ospf_lsa_is_self_originated (ospf, lsa))
- if (!CHECK_FLAG (lsa->flags, OSPF_LSA_APPROVED))
- ospf_lsa_flush_area (lsa, area);
- }
-
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_remove_unapproved_summaries(): Stop");
- }
- void
- ospf_abr_manage_discard_routes (struct ospf *ospf)
- {
- listnode node;
- struct route_node *rn;
- struct ospf_area *area;
- struct ospf_area_range *range;
- for (node = listhead (ospf->areas); node; nextnode (node))
- if ((area = node->data) != NULL)
- for (rn = route_top (area->ranges); rn; rn = route_next (rn))
- if ((range = rn->info) != NULL)
- if (CHECK_FLAG (range->flags, OSPF_AREA_RANGE_ADVERTISE))
- {
- if (range->specifics)
- ospf_add_discard_route (ospf->new_table, area,
- (struct prefix_ipv4 *) &rn->p);
- else
- ospf_delete_discard_route ((struct prefix_ipv4 *) &rn->p);
- }
- }
- #ifdef HAVE_NSSA
- /* This is the function taking care about ABR NSSA, i.e. NSSA
- Translator, -LSA aggregation and flooding. For all NSSAs
- Any SELF-AS-LSA is in the Type-5 LSDB and Type-7 LSDB. These LSA's
- are refreshed from the Type-5 LSDB, installed into the Type-7 LSDB
- with the P-bit set.
- Any received Type-5s are legal for an ABR, else illegal for IR.
- Received Type-7s are installed, by area, with incoming P-bit. They
- are flooded; if the Elected NSSA Translator, then P-bit off.
- Additionally, this ABR will place "translated type-7's" into the
- Type-5 LSDB in order to keep track of APPROVAL or not.
- It will scan through every area, looking for Type-7 LSAs with P-Bit
- SET. The Type-7's are either AS-FLOODED & 5-INSTALLED or
- AGGREGATED. Later, the AGGREGATED LSAs are AS-FLOODED &
- 5-INSTALLED.
- 5-INSTALLED is into the Type-5 LSDB; Any UNAPPROVED Type-5 LSAs
- left over are FLUSHED and DISCARDED.
- For External Calculations, any NSSA areas use the Type-7 AREA-LSDB,
- any ABR-non-NSSA areas use the Type-5 GLOBAL-LSDB. */
- void
- ospf_abr_nssa_task (struct ospf *ospf) /* called only if any_nssa */
- {
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("Check for NSSA-ABR Tasks():");
- if (! IS_OSPF_ABR (ospf))
- return;
- if (! ospf->anyNSSA)
- return;
- /* Each area must confirm TranslatorRole */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): Start");
- /* For all Global Entries flagged "local-translate", unset APPROVED */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): unapprove translates");
- ospf_abr_unapprove_translates (ospf);
- /* RESET all Ranges in every Area, same as summaries */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): NSSA initialize aggregates");
- /* ospf_abr_prepare_aggregates (); TURNED OFF just for now */
- /* For all NSSAs, Type-7s, translate to 5's, INSTALL/FLOOD, or
- Aggregate as Type-7 */
- /* Install or Approve in Type-5 Global LSDB */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): process translates");
- ospf_abr_process_nssa_translates (ospf);
- /* Translate/Send any "ranged" aggregates, and also 5-Install and
- Approve */
- /* Scan Type-7's for aggregates, translate to Type-5's,
- Install/Flood/Approve */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info("ospf_abr_nssa_task(): send NSSA aggregates");
- /* ospf_abr_send_nssa_aggregates (); TURNED OFF FOR NOW */
- /* Send any NSSA defaults as Type-5 */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): announce nssa defaults");
- ospf_abr_announce_nssa_defaults (ospf);
-
- /* Flush any unapproved previous translates from Global Data Base */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): remove unapproved translates");
- ospf_abr_remove_unapproved_translates (ospf);
- ospf_abr_manage_discard_routes (ospf); /* same as normal...discard */
- if (IS_DEBUG_OSPF_NSSA)
- zlog_info ("ospf_abr_nssa_task(): Stop");
- }
- #endif /* HAVE_NSSA */
- /* This is the function taking care about ABR stuff, i.e.
- summary-LSA origination and flooding. */
- void
- ospf_abr_task (struct ospf *ospf)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): Start");
- if (ospf->new_table == NULL || ospf->new_rtrs == NULL)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): Routing tables are not yet ready");
- return;
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): unapprove summaries");
- ospf_abr_unapprove_summaries (ospf);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): prepare aggregates");
- ospf_abr_prepare_aggregates (ospf);
- if (IS_OSPF_ABR (ospf))
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): process network RT");
- ospf_abr_process_network_rt (ospf, ospf->new_table);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): process router RT");
- ospf_abr_process_router_rt (ospf, ospf->new_rtrs);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): announce aggregates");
- ospf_abr_announce_aggregates (ospf);
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): announce stub defaults");
- ospf_abr_announce_stub_defaults (ospf);
- }
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): remove unapproved summaries");
- ospf_abr_remove_unapproved_summaries (ospf);
- ospf_abr_manage_discard_routes (ospf);
- #ifdef HAVE_NSSA
- ospf_abr_nssa_task (ospf); /* if nssa-abr, then scan Type-7 LSDB */
- #endif /* HAVE_NSSA */
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("ospf_abr_task(): Stop");
- }
- int
- ospf_abr_task_timer (struct thread *thread)
- {
- struct ospf *ospf = THREAD_ARG (thread);
- ospf->t_abr_task = 0;
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("Running ABR task on timer");
- ospf_check_abr_status (ospf);
- ospf_abr_task (ospf);
- return 0;
- }
- void
- ospf_schedule_abr_task (struct ospf *ospf)
- {
- if (IS_DEBUG_OSPF_EVENT)
- zlog_info ("Scheduling ABR task");
- if (ospf->t_abr_task == NULL)
- ospf->t_abr_task = thread_add_timer (master, ospf_abr_task_timer,
- ospf, OSPF_ABR_TASK_DELAY);
- }