diff options
Diffstat (limited to 'ospf6d/ospf6_abr.c')
| -rw-r--r-- | ospf6d/ospf6_abr.c | 655 |
1 files changed, 0 insertions, 655 deletions
diff --git a/ospf6d/ospf6_abr.c b/ospf6d/ospf6_abr.c deleted file mode 100644 index 864e0c23..00000000 --- a/ospf6d/ospf6_abr.c +++ /dev/null @@ -1,655 +0,0 @@ -/* - * Copyright (C) 2001 Yasuhiro Ohara - * - * 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 "ospf6d.h" - -#include "ospf6_dump.h" -#include "ospf6_abr.h" - -static int abr_index; -#define IS_OSPF6_DUMP_ABR (ospf6_dump_is_on (abr_index)) - -#define ADD 0 -#define CHANGE 1 -#define REMOVE 2 - -/* Inter-Area-Prefix-LSA Calculation */ - -static struct ospf6_route_req * -ospf6_abr_entry_lookup (struct ospf6_route_req *abr_entry, - u_int32_t router_id, struct ospf6_area *area) -{ - struct prefix_ls abr_id; - char router_string[32]; - - inet_ntop (AF_INET, &router_id, router_string, sizeof (router_string)); - - //zlog_info ("ABR: Finding router %s in area %s", router_string, area->str); - - memset (&abr_id, 0, sizeof (abr_id)); - abr_id.family = AF_UNSPEC; - abr_id.prefixlen = 64; /* xxx */ - abr_id.id.s_addr = htonl (0); - abr_id.adv_router.s_addr = router_id; - - ospf6_route_lookup (abr_entry, (struct prefix *) &abr_id, - area->table_topology); - - if (ospf6_route_end (abr_entry)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Router %s not found in area %s", - router_string, area->str); - return NULL; - } - - if (abr_entry->path.area_id != area->area_id) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: ABR area id mismatch"); - return NULL; - } - - if (! CHECK_FLAG (abr_entry->path.router_bits, OSPF6_ROUTER_LSA_BIT_B)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: ABR entry's B bit off"); - return NULL; - } - - return abr_entry; -} - -static int -ospf6_abr_prefix_lsa_to_route (struct ospf6_lsa *lsa, - struct ospf6_route_req *request) -{ - struct ospf6_inter_area_prefix_lsa *iep; - struct ospf6_route_req abr_entry; - - if (lsa->header->type != htons (OSPF6_LSA_TYPE_INTER_PREFIX)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: LSA type mismatch"); - return -1; - } - - if (IS_LSA_MAXAGE (lsa)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: LSA MaxAge"); - return -1; - } - - if (! ospf6_abr_entry_lookup (&abr_entry, lsa->header->adv_router, - (struct ospf6_area *) lsa->scope)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: ABR check failed"); - return -1; - } - - iep = OSPF6_LSA_HEADER_END (lsa->header); - - memset (request, 0, sizeof (struct ospf6_route_req)); - request->route.type = OSPF6_DEST_TYPE_NETWORK; - request->route.prefix.family = AF_INET6; - request->route.prefix.prefixlen = iep->prefix.prefix_length; - ospf6_prefix_in6_addr (&iep->prefix, &request->route.prefix.u.prefix6); - - request->path.cost = abr_entry.path.cost + - (ntohl (iep->metric) & ntohl (0x000fffff)); - request->path.type = OSPF6_PATH_TYPE_INTER; - request->path.origin.type = lsa->header->type; - request->path.origin.id = lsa->header->id; - request->path.origin.adv_router = lsa->header->adv_router; - memcpy (&request->nexthop.address, &abr_entry.nexthop.address, - sizeof (request->nexthop.address)); - request->nexthop.ifindex = abr_entry.nexthop.ifindex; - - return 0; -} - -void -ospf6_abr_prefix_lsa_add (struct ospf6_lsa *lsa) -{ - struct ospf6_route_req request; - int ret; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Calculate %s", lsa->str); - - ret = ospf6_abr_prefix_lsa_to_route (lsa, &request); - if (ret < 0) - return; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Inter Area Route add for %s", lsa->str); - - ospf6_route_add (&request, ospf6->route_table); -} - -void -ospf6_abr_prefix_lsa_remove (struct ospf6_lsa *lsa) -{ - struct ospf6_inter_area_prefix_lsa *iep; - struct prefix_ipv6 prefix6; - struct ospf6_route_req request; - - iep = OSPF6_LSA_HEADER_END (lsa->header); - - prefix6.family = AF_INET6; - prefix6.prefixlen = iep->prefix.prefix_length; - ospf6_prefix_in6_addr (&iep->prefix, &prefix6.prefix); - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Inter Area Route remove for %s", lsa->str); - - for (ospf6_route_lookup (&request, (struct prefix *) &prefix6, - ospf6->route_table); - ! ospf6_route_end (&request); - ospf6_route_next (&request)) - { - if (memcmp (&prefix6, &request.route.prefix, sizeof (prefix6))) - break; - if (request.path.origin.type != htons (OSPF6_LSA_TYPE_INTER_PREFIX) || - request.path.origin.adv_router != lsa->header->adv_router || - request.path.origin.id != lsa->header->id) - continue; - - ospf6_route_remove (&request, ospf6->route_table); - } -} - -static int -ospf6_abr_router_lsa_to_route (struct ospf6_lsa *lsa, - struct ospf6_route_req *request) -{ - struct ospf6_inter_area_router_lsa *ier; - struct ospf6_route_req abr_entry; - - if (lsa->header->type != htons (OSPF6_LSA_TYPE_INTER_ROUTER)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: LSA type mismatch"); - return -1; - } - - if (IS_LSA_MAXAGE (lsa)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: LSA MaxAge"); - return -1; - } - - if (! ospf6_abr_entry_lookup (&abr_entry, lsa->header->adv_router, - (struct ospf6_area *) lsa->scope)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Advertising router check failed"); - return -1; - } - - ier = OSPF6_LSA_HEADER_END (lsa->header); - - memset (request, 0, sizeof (struct ospf6_route_req)); - request->route.type = OSPF6_DEST_TYPE_ROUTER; - request->route.prefix.family = AF_UNSPEC; - request->route.prefix.prefixlen = 64; /* XXX */ - ((struct prefix_ls *) &request->route.prefix)->adv_router.s_addr - = ier->router_id; - - request->path.cost = abr_entry.path.cost + - (ntohl (ier->metric & htonl (0x000fffff))); - request->path.type = OSPF6_PATH_TYPE_INTER; - request->path.origin.type = lsa->header->type; - request->path.origin.id = lsa->header->id; - request->path.origin.adv_router = lsa->header->adv_router; - SET_FLAG (request->path.router_bits, OSPF6_ROUTER_LSA_BIT_E); - request->path.capability[0] = ier->options[0]; - request->path.capability[1] = ier->options[1]; - request->path.capability[2] = ier->options[2]; - - memcpy (&request->nexthop.address, &abr_entry.nexthop.address, - sizeof (request->nexthop.address)); - request->nexthop.ifindex = abr_entry.nexthop.ifindex; - - return 0; -} - -void -ospf6_abr_router_lsa_add (struct ospf6_lsa *lsa) -{ - struct ospf6_route_req request; - int ret; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Calculate %s", lsa->str); - - ret = ospf6_abr_router_lsa_to_route (lsa, &request); - if (ret < 0) - return; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Inter Area Router add for %s", lsa->str); - - ospf6_route_add (&request, ospf6->topology_table); -} - -void -ospf6_abr_router_lsa_remove (struct ospf6_lsa *lsa) -{ - struct ospf6_inter_area_router_lsa *ier; - struct prefix_ls prefix_ls; - struct ospf6_route_req request; - - ier = OSPF6_LSA_HEADER_END (lsa->header); - - memset (&prefix_ls, 0, sizeof (prefix_ls)); - prefix_ls.family = AF_INET6; - prefix_ls.prefixlen = 64; /* XXX */ - prefix_ls.adv_router.s_addr = ier->router_id; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Inter Area Route remove for %s", lsa->str); - - for (ospf6_route_lookup (&request, (struct prefix *) &prefix_ls, - ospf6->route_table); - ! ospf6_route_end (&request); - ospf6_route_next (&request)) - { - if (memcmp (&prefix_ls, &request.route.prefix, sizeof (prefix_ls))) - break; - if (request.path.origin.type != htons (OSPF6_LSA_TYPE_INTER_ROUTER) || - request.path.origin.adv_router != lsa->header->adv_router || - request.path.origin.id != lsa->header->id) - continue; - - ospf6_route_remove (&request, ospf6->route_table); - } -} - - -void -ospf6_abr_abr_entry_add (struct ospf6_route_req *abr_entry) -{ - struct ospf6_lsdb_node node; - struct prefix_ls *abr_id; - struct ospf6_route_req request; - struct ospf6_area *area; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: New Area Border Router found"); - - area = ospf6_area_lookup (abr_entry->path.area_id, ospf6); - if (! area) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Can't find associated area"); - return; - } - - abr_id = (struct prefix_ls *) &abr_entry->route.prefix; - if (! ospf6_abr_entry_lookup (&request, abr_id->adv_router.s_addr, area)) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: back check failed"); - return; - } - - /* for each inter-prefix LSA this ABR originated */ - for (ospf6_lsdb_type_router (&node, htons (OSPF6_LSA_TYPE_INTER_PREFIX), - abr_id->adv_router.s_addr, area->lsdb); - ! ospf6_lsdb_is_end (&node); - ospf6_lsdb_next (&node)) - ospf6_abr_prefix_lsa_add (node.lsa); - - /* for each inter-router LSA this ABR originated */ - for (ospf6_lsdb_type_router (&node, htons (OSPF6_LSA_TYPE_INTER_ROUTER), - abr_id->adv_router.s_addr, area->lsdb); - ! ospf6_lsdb_is_end (&node); - ospf6_lsdb_next (&node)) - ospf6_abr_router_lsa_add (node.lsa); -} - -void -ospf6_abr_abr_entry_remove (struct ospf6_route_req *abr_entry) -{ - struct ospf6_lsdb_node node; - struct prefix_ls *abr_id; - struct ospf6_area *area; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Area Border Router removed"); - - abr_id = (struct prefix_ls *) &abr_entry->route.prefix; - - area = ospf6_area_lookup (abr_entry->path.area_id, ospf6); - if (! area) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Can't find associated area"); - return; - } - - /* for each inter-prefix LSA this ABR originated */ - for (ospf6_lsdb_type_router (&node, htons (OSPF6_LSA_TYPE_INTER_PREFIX), - abr_id->adv_router.s_addr, area->lsdb); - ! ospf6_lsdb_is_end (&node); - ospf6_lsdb_next (&node)) - ospf6_abr_prefix_lsa_remove (node.lsa); - - /* for each inter-router LSA this ABR originated */ - for (ospf6_lsdb_type_router (&node, htons (OSPF6_LSA_TYPE_INTER_ROUTER), - abr_id->adv_router.s_addr, area->lsdb); - ! ospf6_lsdb_is_end (&node); - ospf6_lsdb_next (&node)) - ospf6_abr_router_lsa_remove (node.lsa); -} - -/* Inter-Area-Prefix-LSA Origination */ - -static void -ospf6_abr_prefix_lsa_update_add (struct ospf6_route_req *request, - struct ospf6_area *area) -{ - char buffer [MAXLSASIZE]; - u_int16_t size; - struct ospf6_inter_area_prefix_lsa *iep; - char *p; - - if (IS_OSPF6_DUMP_ABR) - zlog_info ("Update Inter-Prefix for %s: ID: %lu", - area->str, (u_long) ntohl (request->route_id)); - - /* prepare buffer */ - memset (buffer, 0, sizeof (buffer)); - size = sizeof (struct ospf6_inter_area_prefix_lsa); - iep = (struct ospf6_inter_area_prefix_lsa *) buffer; - p = (char *) (iep + 1); - - /* prefixlen */ - iep->prefix.prefix_length = request->route.prefix.prefixlen; - - /* PrefixOptions */ - iep->prefix.prefix_options = request->path.prefix_options; - - /* set Prefix */ - memcpy (p, &request->route.prefix.u.prefix6, - OSPF6_PREFIX_SPACE (request->route.prefix.prefixlen)); - ospf6_prefix_apply_mask (&iep->prefix); - size += OSPF6_PREFIX_SPACE (request->route.prefix.prefixlen); - - ospf6_lsa_originate (htons (OSPF6_LSA_TYPE_INTER_PREFIX), - htonl (request->route_id), ospf6->router_id, - (char *) iep, size, area); -} - -static void -ospf6_abr_prefix_lsa_update_remove (struct ospf6_route_req *request, - struct ospf6_area *area) -{ - struct ospf6_lsa *lsa; - lsa = ospf6_lsdb_lookup_lsdb (htons (OSPF6_LSA_TYPE_INTER_PREFIX), - htonl (request->route_id), - ospf6->router_id, area->lsdb); - if (lsa) - ospf6_lsa_premature_aging (lsa); -} - -static void -ospf6_abr_prefix_lsa_update (int type, struct ospf6_route_req *request) -{ - struct ospf6_route_req route, target; - listnode node; - struct ospf6_area *area; - struct ospf6_interface *o6i; - - if (request->route.type != OSPF6_DEST_TYPE_NETWORK) - return; - - /* assert this is best path; if not, return */ - ospf6_route_lookup (&route, &request->route.prefix, request->table); - if (memcmp (&route.path, &request->path, sizeof (route.path))) - return; - - if (target.path.cost >= LS_INFINITY || - target.path.cost_e2 >= LS_INFINITY) - { - if (IS_OSPF6_DUMP_ABR) - zlog_info ("ABR: Exceeds LS Infinity, ignore"); - return; - } - - ospf6_route_lookup (&target, &request->route.prefix, request->table); - if (type == REMOVE) - { - ospf6_route_next (&route); - if (! memcmp (&route.route, &request->route, sizeof (route.route))) - { - type = ADD; - ospf6_route_next (&target); - } - } - - for (node = listhead (ospf6->area_list); node; nextnode (node)) - { - area = getdata (node); - - if (target.path.area_id == area->area_id) - continue; - - o6i = ospf6_interface_lookup_by_index (target.nexthop.ifindex); - if (o6i && o6i->area && o6i->area->area_id == area->area_id) - { - zlog_info ("ABR: Logical equivalent of split horizon, skip for %s", - area->str); - continue; - } - - if (area->area_id == ntohs (0) && /* Backbone */ - target.path.type != OSPF6_PATH_TYPE_INTRA) - continue; - - /* XXX, stub area check */ - - /* XXX, aggregate */ - /* if either the area of the route or the area trying to - advertise is backbone, do not aggregate */ - - if (type == ADD) - ospf6_abr_prefix_lsa_update_add (&target, area); - else - ospf6_abr_prefix_lsa_update_remove (&target, area); - } -} - -void -ospf6_abr_route_add (struct ospf6_route_req *request) -{ - ospf6_abr_prefix_lsa_update (ADD, request); -} - -void -ospf6_abr_route_remove (struct ospf6_route_req *request) -{ - ospf6_abr_prefix_lsa_update (REMOVE, request); -} - -int -ospf6_abr_prefix_lsa_refresh (void *data) -{ - struct ospf6_lsa *lsa = data; - struct ospf6_inter_area_prefix_lsa *ier; - struct prefix_ipv6 prefix6; - struct ospf6_route_req route; - - ier = OSPF6_LSA_HEADER_END (lsa->header); - memset (&prefix6, 0, sizeof (prefix6)); - prefix6.family = AF_INET6; - prefix6.prefixlen = ier->prefix.prefix_length; - ospf6_prefix_in6_addr (&ier->prefix, &prefix6.prefix); - - ospf6_route_lookup (&route, (struct prefix *) &prefix6, - ospf6->route_table); - assert (! ospf6_route_end (&route)); - - ospf6_abr_prefix_lsa_update (ADD, &route); - return 0; -} - -int -ospf6_abr_prefix_lsa_show (struct vty *vty, struct ospf6_lsa *lsa) -{ - struct ospf6_inter_area_prefix_lsa *ier; - char prefix[128]; - - assert (lsa->header); - ier = OSPF6_LSA_HEADER_END (lsa->header); - - ospf6_prefix_string (&ier->prefix, prefix, sizeof (prefix)); - - vty_out (vty, " Metric: %d%s", - ntohl (ier->metric & htonl (0x000fffff)), VTY_NEWLINE); - vty_out (vty, " Prefix: %s%s", prefix, VTY_NEWLINE); - - return 0; -} - -int -ospf6_abr_prefix_lsa_hook_add (void *data) -{ - struct ospf6_lsa *lsa = data; - ospf6_abr_prefix_lsa_add (lsa); - return 0; -} - -int -ospf6_abr_prefix_lsa_hook_remove (void *data) -{ - struct ospf6_lsa *lsa = data; - ospf6_abr_prefix_lsa_remove (lsa); - return 0; -} - -void -ospf6_abr_database_hook_inter_prefix (struct ospf6_lsa *old, - struct ospf6_lsa *new) -{ - if (old) - ospf6_abr_prefix_lsa_hook_remove (old); - if (new && ! IS_LSA_MAXAGE (new)) - ospf6_abr_prefix_lsa_hook_add (new); -} - -void -ospf6_abr_register_inter_prefix () -{ - struct ospf6_lsa_slot slot; - - memset (&slot, 0, sizeof (slot)); - slot.type = htons (OSPF6_LSA_TYPE_INTER_PREFIX); - slot.name = "Inter-Prefix"; - slot.func_show = ospf6_abr_prefix_lsa_show; - slot.func_refresh = ospf6_abr_prefix_lsa_refresh; - ospf6_lsa_slot_register (&slot); - - ospf6_lsdb_hook[OSPF6_LSA_TYPE_INTER_PREFIX & OSPF6_LSTYPE_CODE_MASK].hook = - ospf6_abr_database_hook_inter_prefix; -} - -int -ospf6_abr_router_lsa_hook_add (void *data) -{ - struct ospf6_lsa *lsa = data; - ospf6_abr_router_lsa_add (lsa); - return 0; -} - -int -ospf6_abr_router_lsa_hook_remove (void *data) -{ - struct ospf6_lsa *lsa = data; - ospf6_abr_router_lsa_remove (lsa); - return 0; -} - -int -ospf6_abr_router_lsa_show (struct vty *vty, struct ospf6_lsa *lsa) -{ - return 0; -} - -int -ospf6_abr_router_lsa_refresh (void *data) -{ - return 0; -} - -void -ospf6_abr_database_hook_inter_router (struct ospf6_lsa *old, - struct ospf6_lsa *new) -{ - if (old) - ospf6_abr_router_lsa_hook_remove (old); - if (new && ! IS_LSA_MAXAGE (new)) - ospf6_abr_router_lsa_hook_add (new); -} - -void -ospf6_abr_register_inter_router () -{ - struct ospf6_lsa_slot slot; - - memset (&slot, 0, sizeof (slot)); - slot.type = htons (OSPF6_LSA_TYPE_INTER_ROUTER); - slot.name = "Inter-Router"; - slot.func_show = ospf6_abr_router_lsa_show; - slot.func_refresh = ospf6_abr_router_lsa_refresh; - ospf6_lsa_slot_register (&slot); - - ospf6_lsdb_hook[OSPF6_LSA_TYPE_INTER_ROUTER & OSPF6_LSTYPE_CODE_MASK].hook = - ospf6_abr_database_hook_inter_router; -} - -void -ospf6_abr_inter_route_calculation (struct ospf6_area *area) -{ - struct ospf6_lsdb_node node; - - /* for each inter-prefix LSA */ - for (ospf6_lsdb_type (&node, htons (OSPF6_LSA_TYPE_INTER_PREFIX), - area->lsdb); - ! ospf6_lsdb_is_end (&node); - ospf6_lsdb_next (&node)) - ospf6_abr_prefix_lsa_add (node.lsa); -} - -void -ospf6_abr_init () -{ - abr_index = ospf6_dump_install ("abr", "Area Border Router Function\n"); - - ospf6_abr_register_inter_prefix (); - ospf6_abr_register_inter_router (); -} - - |