From 718e3744195351130f4ce7dbe0613f4b3e23df93 Mon Sep 17 00:00:00 2001 From: paul Date: Fri, 13 Dec 2002 20:15:29 +0000 Subject: Initial revision --- ospfd/ospf_asbr.c | 287 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 287 insertions(+) create mode 100644 ospfd/ospf_asbr.c (limited to 'ospfd/ospf_asbr.c') diff --git a/ospfd/ospf_asbr.c b/ospfd/ospf_asbr.c new file mode 100644 index 00000000..d13bbc43 --- /dev/null +++ b/ospfd/ospf_asbr.c @@ -0,0 +1,287 @@ +/* + * OSPF AS Boundary Router functions. + * Copyright (C) 1999, 2000 Kunihiro Ishiguro, 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 + +#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 "log.h" + +#include "ospfd/ospfd.h" +#include "ospfd/ospf_interface.h" +#include "ospfd/ospf_asbr.h" +#include "ospfd/ospf_lsa.h" +#include "ospfd/ospf_lsdb.h" +#include "ospfd/ospf_neighbor.h" +#include "ospfd/ospf_spf.h" +#include "ospfd/ospf_flood.h" +#include "ospfd/ospf_route.h" +#include "ospfd/ospf_zebra.h" +#include "ospfd/ospf_dump.h" + +/* Remove external route. */ +void +ospf_external_route_remove (struct prefix_ipv4 *p) +{ + struct route_node *rn; + struct ospf_route *or; + + rn = route_node_lookup (ospf_top->old_external_route, (struct prefix *) p); + if (rn) + if ((or = rn->info)) + { + zlog_info ("Route[%s/%d]: external path deleted", + inet_ntoa (p->prefix), p->prefixlen); + + /* Remove route from zebra. */ + if (or->type == OSPF_DESTINATION_NETWORK) + ospf_zebra_delete ((struct prefix_ipv4 *) &rn->p, or); + + ospf_route_free (or); + rn->info = NULL; + + route_unlock_node (rn); + route_unlock_node (rn); + return; + } + + zlog_info ("Route[%s/%d]: no such external path", + inet_ntoa (p->prefix), p->prefixlen); +} + +/* Lookup external route. */ +struct ospf_route * +ospf_external_route_lookup (struct prefix_ipv4 *p) +{ + struct route_node *rn; + + rn = route_node_lookup (ospf_top->old_external_route, (struct prefix *) p); + if (rn) + { + route_unlock_node (rn); + if (rn->info) + return rn->info; + } + + zlog_warn ("Route[%s/%d]: lookup, no such prefix", + inet_ntoa (p->prefix), p->prefixlen); + + return NULL; +} + + +/* Add an External info for AS-external-LSA. */ +struct external_info * +ospf_external_info_new (u_char type) +{ + struct external_info *new; + + new = (struct external_info *) + XMALLOC (MTYPE_OSPF_EXTERNAL_INFO, sizeof (struct external_info)); + memset (new, 0, sizeof (struct external_info)); + new->type = type; + + ospf_reset_route_map_set_values (&new->route_map_set); + return new; +} + +void +ospf_external_info_free (struct external_info *ei) +{ + XFREE (MTYPE_OSPF_EXTERNAL_INFO, ei); +} + +void +ospf_reset_route_map_set_values (struct route_map_set_values *values) +{ + values->metric = -1; + values->metric_type = -1; +} + +int +ospf_route_map_set_compare (struct route_map_set_values *values1, + struct route_map_set_values *values2) +{ + return values1->metric == values2->metric && + values1->metric_type == values2->metric_type; +} + +/* Add an External info for AS-external-LSA. */ +struct external_info * +ospf_external_info_add (u_char type, struct prefix_ipv4 p, + unsigned int ifindex, struct in_addr nexthop) +{ + struct external_info *new; + struct route_node *rn; + + /* Initialize route table. */ + if (EXTERNAL_INFO (type) == NULL) + EXTERNAL_INFO (type) = route_table_init (); + + rn = route_node_get (EXTERNAL_INFO (type), (struct prefix *) &p); + /* If old info exists, -- discard new one or overwrite with new one? */ + if (rn) + if (rn->info) + { + route_unlock_node (rn); + zlog_warn ("Redistribute[%s]: %s/%d already exists, discard.", + LOOKUP (ospf_redistributed_proto, type), + inet_ntoa (p.prefix), p.prefixlen); + /* XFREE (MTYPE_OSPF_TMP, rn->info); */ + return rn->info; + } + + /* Create new External info instance. */ + new = ospf_external_info_new (type); + new->p = p; + new->ifindex = ifindex; + new->nexthop = nexthop; + new->tag = 0; + + rn->info = new; + + if (IS_DEBUG_OSPF (lsa, LSA_GENERATE)) + zlog_info ("Redistribute[%s]: %s/%d external info created.", + LOOKUP (ospf_redistributed_proto, type), + inet_ntoa (p.prefix), p.prefixlen); + return new; +} + +void +ospf_external_info_delete (u_char type, struct prefix_ipv4 p) +{ + struct route_node *rn; + + rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) &p); + if (rn) + { + ospf_external_info_free (rn->info); + rn->info = NULL; + route_unlock_node (rn); + route_unlock_node (rn); + } +} + +struct external_info * +ospf_external_info_lookup (u_char type, struct prefix_ipv4 *p) +{ + struct route_node *rn; + rn = route_node_lookup (EXTERNAL_INFO (type), (struct prefix *) p); + if (rn) + { + route_unlock_node (rn); + if (rn->info) + return rn->info; + } + + return NULL; +} + +struct ospf_lsa * +ospf_external_info_find_lsa (struct prefix_ipv4 *p) +{ + struct ospf_lsa *lsa; + struct as_external_lsa *al; + struct in_addr mask, id; + + lsa = ospf_lsdb_lookup_by_id (ospf_top->lsdb, OSPF_AS_EXTERNAL_LSA, + p->prefix, ospf_top->router_id); + + if (!lsa) + return NULL; + + al = (struct as_external_lsa *) lsa->data; + + masklen2ip (p->prefixlen, &mask); + + if (mask.s_addr != al->mask.s_addr) + { + id.s_addr = p->prefix.s_addr | (~mask.s_addr); + lsa = ospf_lsdb_lookup_by_id (ospf_top->lsdb, OSPF_AS_EXTERNAL_LSA, + id, ospf_top->router_id); + if (!lsa) + return NULL; + } + + return lsa; +} + + +/* Update ASBR status. */ +void +ospf_asbr_status_update (u_char status) +{ + zlog_info ("ASBR[Status:%d]: Update", status); + + /* ASBR on. */ + if (status) + { + /* Already ASBR. */ + if (OSPF_IS_ASBR) + { + zlog_info ("ASBR[Status:%d]: Already ASBR", status); + return; + } + SET_FLAG (ospf_top->flags, OSPF_FLAG_ASBR); + } + else + { + /* Already non ASBR. */ + if (! OSPF_IS_ASBR) + { + zlog_info ("ASBR[Status:%d]: Already non ASBR", status); + return; + } + UNSET_FLAG (ospf_top->flags, OSPF_FLAG_ASBR); + } + + /* Transition from/to status ASBR, schedule timer. */ + ospf_spf_calculate_schedule (); + OSPF_TIMER_ON (ospf_top->t_router_lsa_update, + ospf_router_lsa_update_timer, OSPF_LSA_UPDATE_DELAY); +} + +void +ospf_redistribute_withdraw (u_char type) +{ + struct route_node *rn; + struct external_info *ei; + + /* Delete external info for specified type. */ + if (EXTERNAL_INFO (type)) + for (rn = route_top (EXTERNAL_INFO (type)); rn; rn = route_next (rn)) + if ((ei = rn->info)) + if (ospf_external_info_find_lsa (&ei->p)) + { + if (is_prefix_default (&ei->p) && + ospf_top->default_originate != DEFAULT_ORIGINATE_NONE) + continue; + ospf_external_lsa_flush (type, &ei->p, ei->ifindex, ei->nexthop); + ospf_external_info_delete (type, ei->p); + } +} -- cgit v1.2.1