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ospfd.c
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/* OSPF version 2 daemon program.
* Copyright (C) 1999, 2000 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "thread.h"
#include "vty.h"
#include "command.h"
#include "linklist.h"
#include "prefix.h"
#include "table.h"
#include "if.h"
#include "memory.h"
#include "stream.h"
#include "log.h"
#include "sockunion.h" /* for inet_aton () */
#include "zclient.h"
#include "routemap.h"
#include "plist.h"
#include "sockopt.h"
#include "bfd.h"
#include "libfrr.h"
#include "defaults.h"
#include "lib_errors.h"
#include "ospfd/ospfd.h"
#include "ospfd/ospf_network.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_packet.h"
#include "ospfd/ospf_dump.h"
#include "ospfd/ospf_route.h"
#include "ospfd/ospf_zebra.h"
#include "ospfd/ospf_abr.h"
#include "ospfd/ospf_flood.h"
#include "ospfd/ospf_ase.h"
DEFINE_QOBJ_TYPE(ospf)
/* OSPF process wide configuration. */
static struct ospf_master ospf_master;
/* OSPF process wide configuration pointer to export. */
struct ospf_master *om;
extern struct zclient *zclient;
static void ospf_remove_vls_through_area(struct ospf *, struct ospf_area *);
static void ospf_network_free(struct ospf *, struct ospf_network *);
static void ospf_area_free(struct ospf_area *);
static void ospf_network_run(struct prefix *, struct ospf_area *);
static void ospf_network_run_interface(struct ospf *, struct interface *,
struct prefix *, struct ospf_area *);
static void ospf_network_run_subnet(struct ospf *, struct connected *,
struct prefix *, struct ospf_area *);
static int ospf_network_match_iface(const struct connected *,
const struct prefix *);
static void ospf_finish_final(struct ospf *);
#define OSPF_EXTERNAL_LSA_ORIGINATE_DELAY 1
void ospf_router_id_update(struct ospf *ospf)
{
struct vrf *vrf = vrf_lookup_by_id(ospf->vrf_id);
struct in_addr router_id, router_id_old;
struct ospf_interface *oi;
struct interface *ifp;
struct listnode *node;
int type;
if (!ospf->oi_running) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"Router ospf not configured -- Router-ID update postponed");
return;
}
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("Router-ID[OLD:%s]: Update",
inet_ntoa(ospf->router_id));
router_id_old = ospf->router_id;
/* Select the router ID based on these priorities:
1. Statically assigned router ID is always the first choice.
2. If there is no statically assigned router ID, then try to stick
with the most recent value, since changing router ID's is very
disruptive.
3. Last choice: just go with whatever the zebra daemon recommends.
*/
if (ospf->router_id_static.s_addr != 0)
router_id = ospf->router_id_static;
else if (ospf->router_id.s_addr != 0)
router_id = ospf->router_id;
else
router_id = ospf->router_id_zebra;
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("Router-ID[OLD:%s]: Update to %s",
inet_ntoa(ospf->router_id), inet_ntoa(router_id));
if (!IPV4_ADDR_SAME(&router_id_old, &router_id)) {
for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) {
/* Some nbrs are identified by router_id, these needs
* to be rebuilt. Possible optimization would be to do
* oi->nbr_self->router_id = router_id for
* !(virtual | ptop) links
*/
ospf_nbr_self_reset(oi, router_id);
}
/* If AS-external-LSA is queued, then flush those LSAs. */
if (router_id_old.s_addr == 0 && ospf->external_origin) {
/* Originate each redistributed external route. */
for (type = 0; type < ZEBRA_ROUTE_MAX; type++)
if (ospf->external_origin & (1 << type))
thread_add_event(
master,
ospf_external_lsa_originate_timer,
ospf, type, NULL);
/* Originate Deafult. */
if (ospf->external_origin & (1 << ZEBRA_ROUTE_MAX))
thread_add_event(master,
ospf_default_originate_timer,
ospf, 0, NULL);
ospf->external_origin = 0;
}
/* Flush (inline) all external LSAs based on the OSPF_LSA_SELF
* flag */
if (ospf->lsdb) {
struct route_node *rn;
struct ospf_lsa *lsa;
LSDB_LOOP (EXTERNAL_LSDB(ospf), rn, lsa)
if (IS_LSA_SELF(lsa))
ospf_lsa_flush_schedule(ospf, lsa);
}
ospf->router_id = router_id;
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("Router-ID[NEW:%s]: Update",
inet_ntoa(ospf->router_id));
/* Flush (inline) all external LSAs which now match the new
router-id,
need to adjust the OSPF_LSA_SELF flag, so the flush doesn't
hit
asserts in ospf_refresher_unregister_lsa(). This step is
needed
because the current quagga code does look-up for
self-originated LSAs
based on the self router-id alone but expects OSPF_LSA_SELF
to be
properly set */
if (ospf->lsdb) {
struct route_node *rn;
struct ospf_lsa *lsa;
LSDB_LOOP (EXTERNAL_LSDB(ospf), rn, lsa) {
/* AdvRouter and Router ID is the same. */
if (IPV4_ADDR_SAME(&lsa->data->adv_router,
&ospf->router_id)) {
SET_FLAG(lsa->flags,
OSPF_LSA_SELF_CHECKED);
SET_FLAG(lsa->flags, OSPF_LSA_SELF);
ospf_lsa_flush_schedule(ospf, lsa);
}
}
}
/* Originate each redistributed external route. */
for (type = 0; type < ZEBRA_ROUTE_MAX; type++)
thread_add_event(master,
ospf_external_lsa_originate_timer,
ospf, type, NULL);
thread_add_event(master, ospf_default_originate_timer, ospf, 0,
NULL);
/* update router-lsa's for each area */
ospf_router_lsa_update(ospf);
/* update ospf_interface's */
FOR_ALL_INTERFACES (vrf, ifp)
ospf_if_update(ospf, ifp);
}
}
/* For OSPF area sort by area id. */
static int ospf_area_id_cmp(struct ospf_area *a1, struct ospf_area *a2)
{
if (ntohl(a1->area_id.s_addr) > ntohl(a2->area_id.s_addr))
return 1;
if (ntohl(a1->area_id.s_addr) < ntohl(a2->area_id.s_addr))
return -1;
return 0;
}
/* Allocate new ospf structure. */
static struct ospf *ospf_new(unsigned short instance, const char *name)
{
int i;
struct vrf *vrf = NULL;
struct ospf *new = XCALLOC(MTYPE_OSPF_TOP, sizeof(struct ospf));
new->instance = instance;
new->router_id.s_addr = htonl(0);
new->router_id_static.s_addr = htonl(0);
if (name) {
vrf = vrf_lookup_by_name(name);
if (vrf)
new->vrf_id = vrf->vrf_id;
else
new->vrf_id = VRF_UNKNOWN;
/* Freed in ospf_finish_final */
new->name = XSTRDUP(MTYPE_OSPF_TOP, name);
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"%s: Create new ospf instance with vrf_name %s vrf_id %u",
__PRETTY_FUNCTION__, name, new->vrf_id);
} else {
new->vrf_id = VRF_DEFAULT;
vrf = vrf_lookup_by_id(VRF_DEFAULT);
}
if (vrf)
ospf_vrf_link(new, vrf);
ospf_zebra_vrf_register(new);
new->abr_type = OSPF_ABR_DEFAULT;
new->oiflist = list_new();
new->vlinks = list_new();
new->areas = list_new();
new->areas->cmp = (int (*)(void *, void *))ospf_area_id_cmp;
new->networks = route_table_init();
new->nbr_nbma = route_table_init();
new->lsdb = ospf_lsdb_new();
new->default_originate = DEFAULT_ORIGINATE_NONE;
new->passive_interface_default = OSPF_IF_ACTIVE;
new->new_external_route = route_table_init();
new->old_external_route = route_table_init();
new->external_lsas = route_table_init();
new->stub_router_startup_time = OSPF_STUB_ROUTER_UNCONFIGURED;
new->stub_router_shutdown_time = OSPF_STUB_ROUTER_UNCONFIGURED;
new->stub_router_admin_set = OSPF_STUB_ROUTER_ADMINISTRATIVE_UNSET;
/* Distribute parameter init. */
for (i = 0; i <= ZEBRA_ROUTE_MAX; i++) {
new->dtag[i] = 0;
}
new->default_metric = -1;
new->ref_bandwidth = OSPF_DEFAULT_REF_BANDWIDTH;
/* LSA timers */
new->min_ls_interval = OSPF_MIN_LS_INTERVAL;
new->min_ls_arrival = OSPF_MIN_LS_ARRIVAL;
/* SPF timer value init. */
new->spf_delay = OSPF_SPF_DELAY_DEFAULT;
new->spf_holdtime = OSPF_SPF_HOLDTIME_DEFAULT;
new->spf_max_holdtime = OSPF_SPF_MAX_HOLDTIME_DEFAULT;
new->spf_hold_multiplier = 1;
/* MaxAge init. */
new->maxage_delay = OSPF_LSA_MAXAGE_REMOVE_DELAY_DEFAULT;
new->maxage_lsa = route_table_init();
new->t_maxage_walker = NULL;
thread_add_timer(master, ospf_lsa_maxage_walker, new,
OSPF_LSA_MAXAGE_CHECK_INTERVAL, &new->t_maxage_walker);
/* Distance table init. */
new->distance_table = route_table_init();
new->lsa_refresh_queue.index = 0;
new->lsa_refresh_interval = OSPF_LSA_REFRESH_INTERVAL_DEFAULT;
new->t_lsa_refresher = NULL;
thread_add_timer(master, ospf_lsa_refresh_walker, new,
new->lsa_refresh_interval, &new->t_lsa_refresher);
new->lsa_refresher_started = monotime(NULL);
new->ibuf = stream_new(OSPF_MAX_PACKET_SIZE + 1);
new->t_read = NULL;
new->oi_write_q = list_new();
new->write_oi_count = OSPF_WRITE_INTERFACE_COUNT_DEFAULT;
/* Enable "log-adjacency-changes" */
#if DFLT_OSPF_LOG_ADJACENCY_CHANGES
SET_FLAG(new->config, OSPF_LOG_ADJACENCY_CHANGES);
#endif
QOBJ_REG(new, ospf);
new->fd = -1;
if ((ospf_sock_init(new)) < 0) {
if (new->vrf_id != VRF_UNKNOWN)
flog_err(
EC_LIB_SOCKET,
"%s: ospf_sock_init is unable to open a socket",
__func__);
return new;
}
thread_add_read(master, ospf_read, new, new->fd, &new->t_read);
return new;
}
struct ospf *ospf_lookup_instance(unsigned short instance)
{
struct ospf *ospf;
struct listnode *node, *nnode;
if (listcount(om->ospf) == 0)
return NULL;
for (ALL_LIST_ELEMENTS(om->ospf, node, nnode, ospf))
if ((ospf->instance == 0 && instance == 0)
|| (ospf->instance && instance
&& ospf->instance == instance))
return ospf;
return NULL;
}
static int ospf_is_ready(struct ospf *ospf)
{
/* OSPF must be on and Router-ID must be configured. */
if (!ospf || ospf->router_id.s_addr == 0)
return 0;
return 1;
}
static void ospf_add(struct ospf *ospf)
{
listnode_add(om->ospf, ospf);
}
static void ospf_delete(struct ospf *ospf)
{
listnode_delete(om->ospf, ospf);
}
struct ospf *ospf_lookup_by_inst_name(unsigned short instance, const char *name)
{
struct ospf *ospf = NULL;
struct listnode *node, *nnode;
if (name == NULL || strmatch(name, VRF_DEFAULT_NAME))
return ospf_lookup_by_vrf_id(VRF_DEFAULT);
for (ALL_LIST_ELEMENTS(om->ospf, node, nnode, ospf)) {
if ((ospf->instance == instance)
&& ((ospf->name == NULL && name == NULL)
|| (ospf->name && name
&& strcmp(ospf->name, name) == 0)))
return ospf;
}
return NULL;
}
struct ospf *ospf_get(unsigned short instance, const char *name)
{
struct ospf *ospf;
/* vrf name provided call inst and name based api
* in case of no name pass default ospf instance */
if (name)
ospf = ospf_lookup_by_inst_name(instance, name);
else
ospf = ospf_lookup_by_vrf_id(VRF_DEFAULT);
if (ospf == NULL) {
ospf = ospf_new(instance, name);
ospf_add(ospf);
if (ospf->router_id_static.s_addr == 0)
ospf_router_id_update(ospf);
ospf_opaque_type11_lsa_init(ospf);
}
return ospf;
}
struct ospf *ospf_get_instance(unsigned short instance)
{
struct ospf *ospf;
ospf = ospf_lookup_instance(instance);
if (ospf == NULL) {
ospf = ospf_new(instance, NULL /* VRF_DEFAULT*/);
ospf_add(ospf);
if (ospf->router_id_static.s_addr == 0) {
if (vrf_lookup_by_id(ospf->vrf_id))
ospf_router_id_update(ospf);
else {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"%s: ospf VRF (id %d) is not active yet, skip router id update",
__PRETTY_FUNCTION__,
ospf->vrf_id);
}
ospf_router_id_update(ospf);
}
ospf_opaque_type11_lsa_init(ospf);
}
return ospf;
}
struct ospf *ospf_lookup_by_vrf_id(vrf_id_t vrf_id)
{
struct vrf *vrf = NULL;
vrf = vrf_lookup_by_id(vrf_id);
if (!vrf)
return NULL;
return (vrf->info) ? (struct ospf *)vrf->info : NULL;
}
/* It should only be used when processing incoming info update from zebra.
* Other situations, it is not sufficient to lookup the ospf instance by
* vrf_name only without using the instance number.
*/
static struct ospf *ospf_lookup_by_name(const char *vrf_name)
{
struct ospf *ospf = NULL;
struct listnode *node, *nnode;
for (ALL_LIST_ELEMENTS(om->ospf, node, nnode, ospf))
if ((ospf->name == NULL && vrf_name == NULL)
|| (ospf->name && vrf_name
&& strcmp(ospf->name, vrf_name) == 0))
return ospf;
return NULL;
}
/* Handle the second half of deferred shutdown. This is called either
* from the deferred-shutdown timer thread, or directly through
* ospf_deferred_shutdown_check.
*
* Function is to cleanup G-R state, if required then call ospf_finish_final
* to complete shutdown of this ospf instance. Possibly exit if the
* whole process is being shutdown and this was the last OSPF instance.
*/
static void ospf_deferred_shutdown_finish(struct ospf *ospf)
{
ospf->stub_router_shutdown_time = OSPF_STUB_ROUTER_UNCONFIGURED;
OSPF_TIMER_OFF(ospf->t_deferred_shutdown);
ospf_finish_final(ospf);
/* *ospf is now invalid */
/* ospfd being shut-down? If so, was this the last ospf instance? */
if (CHECK_FLAG(om->options, OSPF_MASTER_SHUTDOWN)
&& (listcount(om->ospf) == 0)) {
exit(0);
}
return;
}
/* Timer thread for G-R */
static int ospf_deferred_shutdown_timer(struct thread *t)
{
struct ospf *ospf = THREAD_ARG(t);
ospf_deferred_shutdown_finish(ospf);
return 0;
}
/* Check whether deferred-shutdown must be scheduled, otherwise call
* down directly into second-half of instance shutdown.
*/
static void ospf_deferred_shutdown_check(struct ospf *ospf)
{
unsigned long timeout;
struct listnode *ln;
struct ospf_area *area;
/* deferred shutdown already running? */
if (ospf->t_deferred_shutdown)
return;
/* Should we try push out max-metric LSAs? */
if (ospf->stub_router_shutdown_time != OSPF_STUB_ROUTER_UNCONFIGURED) {
for (ALL_LIST_ELEMENTS_RO(ospf->areas, ln, area)) {
SET_FLAG(area->stub_router_state,
OSPF_AREA_ADMIN_STUB_ROUTED);
if (!CHECK_FLAG(area->stub_router_state,
OSPF_AREA_IS_STUB_ROUTED))
ospf_router_lsa_update_area(area);
}
timeout = ospf->stub_router_shutdown_time;
} else {
/* No timer needed */
ospf_deferred_shutdown_finish(ospf);
return;
}
OSPF_TIMER_ON(ospf->t_deferred_shutdown, ospf_deferred_shutdown_timer,
timeout);
return;
}
/* Shut down the entire process */
void ospf_terminate(void)
{
struct ospf *ospf;
struct listnode *node, *nnode;
/* shutdown already in progress */
if (CHECK_FLAG(om->options, OSPF_MASTER_SHUTDOWN))
return;
SET_FLAG(om->options, OSPF_MASTER_SHUTDOWN);
/* exit immediately if OSPF not actually running */
if (listcount(om->ospf) == 0)
exit(0);
bfd_gbl_exit();
for (ALL_LIST_ELEMENTS(om->ospf, node, nnode, ospf))
ospf_finish(ospf);
/* Cleanup route maps */
route_map_finish();
/* reverse prefix_list_init */
prefix_list_add_hook(NULL);
prefix_list_delete_hook(NULL);
prefix_list_reset();
/* Cleanup vrf info */
ospf_vrf_terminate();
/* Deliberately go back up, hopefully to thread scheduler, as
* One or more ospf_finish()'s may have deferred shutdown to a timer
* thread
*/
zclient_stop(zclient);
zclient_free(zclient);
frr_fini();
}
void ospf_finish(struct ospf *ospf)
{
/* let deferred shutdown decide */
ospf_deferred_shutdown_check(ospf);
/* if ospf_deferred_shutdown returns, then ospf_finish_final is
* deferred to expiry of G-S timer thread. Return back up, hopefully
* to thread scheduler.
*/
return;
}
/* Final cleanup of ospf instance */
static void ospf_finish_final(struct ospf *ospf)
{
struct vrf *vrf = vrf_lookup_by_id(ospf->vrf_id);
struct route_node *rn;
struct ospf_nbr_nbma *nbr_nbma;
struct ospf_lsa *lsa;
struct interface *ifp;
struct ospf_interface *oi;
struct ospf_area *area;
struct ospf_vl_data *vl_data;
struct listnode *node, *nnode;
int i;
unsigned short instance = 0;
QOBJ_UNREG(ospf);
ospf_opaque_type11_lsa_term(ospf);
ospf_opaque_finish();
ospf_flush_self_originated_lsas_now(ospf);
/* Unregister redistribution */
for (i = 0; i < ZEBRA_ROUTE_MAX; i++) {
struct list *red_list;
struct ospf_redist *red;
red_list = ospf->redist[i];
if (!red_list)
continue;
for (ALL_LIST_ELEMENTS(red_list, node, nnode, red))
ospf_redistribute_unset(ospf, i, red->instance);
}
ospf_redistribute_default_unset(ospf);
for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area))
ospf_remove_vls_through_area(ospf, area);
for (ALL_LIST_ELEMENTS(ospf->vlinks, node, nnode, vl_data))
ospf_vl_delete(ospf, vl_data);
list_delete(&ospf->vlinks);
/* Remove any ospf interface config params */
FOR_ALL_INTERFACES (vrf, ifp) {
struct ospf_if_params *params;
params = IF_DEF_PARAMS(ifp);
if (OSPF_IF_PARAM_CONFIGURED(params, if_area))
UNSET_IF_PARAM(params, if_area);
}
/* Reset interface. */
for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi))
ospf_if_free(oi);
list_delete(&ospf->oiflist);
/* De-Register VRF */
ospf_zebra_vrf_deregister(ospf);
/* Clear static neighbors */
for (rn = route_top(ospf->nbr_nbma); rn; rn = route_next(rn))
if ((nbr_nbma = rn->info)) {
OSPF_POLL_TIMER_OFF(nbr_nbma->t_poll);
if (nbr_nbma->nbr) {
nbr_nbma->nbr->nbr_nbma = NULL;
nbr_nbma->nbr = NULL;
}
if (nbr_nbma->oi) {
listnode_delete(nbr_nbma->oi->nbr_nbma,
nbr_nbma);
nbr_nbma->oi = NULL;
}
XFREE(MTYPE_OSPF_NEIGHBOR_STATIC, nbr_nbma);
}
route_table_finish(ospf->nbr_nbma);
/* Clear networks and Areas. */
for (rn = route_top(ospf->networks); rn; rn = route_next(rn)) {
struct ospf_network *network;
if ((network = rn->info) != NULL) {
ospf_network_free(ospf, network);
rn->info = NULL;
route_unlock_node(rn);
}
}
route_table_finish(ospf->networks);
for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) {
listnode_delete(ospf->areas, area);
ospf_area_free(area);
}
/* Cancel all timers. */
OSPF_TIMER_OFF(ospf->t_external_lsa);
OSPF_TIMER_OFF(ospf->t_spf_calc);
OSPF_TIMER_OFF(ospf->t_ase_calc);
OSPF_TIMER_OFF(ospf->t_maxage);
OSPF_TIMER_OFF(ospf->t_maxage_walker);
OSPF_TIMER_OFF(ospf->t_abr_task);
OSPF_TIMER_OFF(ospf->t_asbr_check);
OSPF_TIMER_OFF(ospf->t_distribute_update);
OSPF_TIMER_OFF(ospf->t_lsa_refresher);
OSPF_TIMER_OFF(ospf->t_read);
OSPF_TIMER_OFF(ospf->t_write);
OSPF_TIMER_OFF(ospf->t_opaque_lsa_self);
OSPF_TIMER_OFF(ospf->t_sr_update);
close(ospf->fd);
stream_free(ospf->ibuf);
LSDB_LOOP (OPAQUE_AS_LSDB(ospf), rn, lsa)
ospf_discard_from_db(ospf, ospf->lsdb, lsa);
LSDB_LOOP (EXTERNAL_LSDB(ospf), rn, lsa)
ospf_discard_from_db(ospf, ospf->lsdb, lsa);
ospf_lsdb_delete_all(ospf->lsdb);
ospf_lsdb_free(ospf->lsdb);
for (rn = route_top(ospf->maxage_lsa); rn; rn = route_next(rn)) {
if ((lsa = rn->info) != NULL) {
ospf_lsa_unlock(&lsa);
rn->info = NULL;
}
route_unlock_node(rn);
}
route_table_finish(ospf->maxage_lsa);
if (ospf->old_table)
ospf_route_table_free(ospf->old_table);
if (ospf->new_table) {
ospf_route_delete(ospf, ospf->new_table);
ospf_route_table_free(ospf->new_table);
}
if (ospf->old_rtrs)
ospf_rtrs_free(ospf->old_rtrs);
if (ospf->new_rtrs)
ospf_rtrs_free(ospf->new_rtrs);
if (ospf->new_external_route) {
ospf_route_delete(ospf, ospf->new_external_route);
ospf_route_table_free(ospf->new_external_route);
}
if (ospf->old_external_route) {
ospf_route_delete(ospf, ospf->old_external_route);
ospf_route_table_free(ospf->old_external_route);
}
if (ospf->external_lsas) {
ospf_ase_external_lsas_finish(ospf->external_lsas);
}
list_delete(&ospf->areas);
list_delete(&ospf->oi_write_q);
for (i = ZEBRA_ROUTE_SYSTEM; i <= ZEBRA_ROUTE_MAX; i++) {
struct list *ext_list;
struct ospf_external *ext;
ext_list = ospf->external[i];
if (!ext_list)
continue;
for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) {
if (ext->external_info)
for (rn = route_top(ext->external_info); rn;
rn = route_next(rn)) {
if (rn->info == NULL)
continue;
XFREE(MTYPE_OSPF_EXTERNAL_INFO,
rn->info);
rn->info = NULL;
route_unlock_node(rn);
}
}
}
ospf_distance_reset(ospf);
route_table_finish(ospf->distance_table);
if (!CHECK_FLAG(om->options, OSPF_MASTER_SHUTDOWN))
instance = ospf->instance;
ospf_delete(ospf);
if (ospf->name) {
vrf = vrf_lookup_by_name(ospf->name);
if (vrf)
ospf_vrf_unlink(ospf, vrf);
XFREE(MTYPE_OSPF_TOP, ospf->name);
} else {
vrf = vrf_lookup_by_id(VRF_DEFAULT);
if (vrf)
ospf_vrf_unlink(ospf, vrf);
}
XFREE(MTYPE_OSPF_TOP, ospf);
if (!CHECK_FLAG(om->options, OSPF_MASTER_SHUTDOWN))
ospf_get_instance(instance);
}
/* allocate new OSPF Area object */
static struct ospf_area *ospf_area_new(struct ospf *ospf,
struct in_addr area_id)
{
struct ospf_area *new;
/* Allocate new config_network. */
new = XCALLOC(MTYPE_OSPF_AREA, sizeof(struct ospf_area));
new->ospf = ospf;
new->area_id = area_id;
new->area_id_fmt = OSPF_AREA_ID_FMT_DOTTEDQUAD;
new->external_routing = OSPF_AREA_DEFAULT;
new->default_cost = 1;
new->auth_type = OSPF_AUTH_NULL;
/* New LSDB init. */
new->lsdb = ospf_lsdb_new();
/* Self-originated LSAs initialize. */
new->router_lsa_self = NULL;
ospf_opaque_type10_lsa_init(new);
new->oiflist = list_new();
new->ranges = route_table_init();
if (area_id.s_addr == OSPF_AREA_BACKBONE)
ospf->backbone = new;
return new;
}
static void ospf_area_free(struct ospf_area *area)
{
struct route_node *rn;
struct ospf_lsa *lsa;
ospf_opaque_type10_lsa_term(area);
/* Free LSDBs. */
LSDB_LOOP (ROUTER_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
LSDB_LOOP (NETWORK_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
LSDB_LOOP (SUMMARY_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
LSDB_LOOP (ASBR_SUMMARY_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
LSDB_LOOP (NSSA_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
LSDB_LOOP (OPAQUE_AREA_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
LSDB_LOOP (OPAQUE_LINK_LSDB(area), rn, lsa)
ospf_discard_from_db(area->ospf, area->lsdb, lsa);
ospf_lsdb_delete_all(area->lsdb);
ospf_lsdb_free(area->lsdb);
ospf_lsa_unlock(&area->router_lsa_self);
route_table_finish(area->ranges);
list_delete(&area->oiflist);
if (EXPORT_NAME(area))
free(EXPORT_NAME(area));
if (IMPORT_NAME(area))
free(IMPORT_NAME(area));
/* Cancel timer. */
OSPF_TIMER_OFF(area->t_stub_router);
OSPF_TIMER_OFF(area->t_opaque_lsa_self);
if (OSPF_IS_AREA_BACKBONE(area))
area->ospf->backbone = NULL;
XFREE(MTYPE_OSPF_AREA, area);
}
void ospf_area_check_free(struct ospf *ospf, struct in_addr area_id)
{
struct ospf_area *area;
area = ospf_area_lookup_by_area_id(ospf, area_id);
if (area && listcount(area->oiflist) == 0 && area->ranges->top == NULL
&& !ospf_vl_count(ospf, area)
&& area->shortcut_configured == OSPF_SHORTCUT_DEFAULT
&& area->external_routing == OSPF_AREA_DEFAULT
&& area->no_summary == 0 && area->default_cost == 1
&& EXPORT_NAME(area) == NULL && IMPORT_NAME(area) == NULL
&& area->auth_type == OSPF_AUTH_NULL) {
listnode_delete(ospf->areas, area);
ospf_area_free(area);
}
}
struct ospf_area *ospf_area_get(struct ospf *ospf, struct in_addr area_id)
{
struct ospf_area *area;
area = ospf_area_lookup_by_area_id(ospf, area_id);
if (!area) {
area = ospf_area_new(ospf, area_id);
listnode_add_sort(ospf->areas, area);
ospf_check_abr_status(ospf);
if (ospf->stub_router_admin_set
== OSPF_STUB_ROUTER_ADMINISTRATIVE_SET) {
SET_FLAG(area->stub_router_state,
OSPF_AREA_ADMIN_STUB_ROUTED);
}
}
return area;
}
struct ospf_area *ospf_area_lookup_by_area_id(struct ospf *ospf,
struct in_addr area_id)
{
struct ospf_area *area;
struct listnode *node;
for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area))
if (IPV4_ADDR_SAME(&area->area_id, &area_id))
return area;
return NULL;
}
void ospf_area_add_if(struct ospf_area *area, struct ospf_interface *oi)
{
listnode_add(area->oiflist, oi);
}
void ospf_area_del_if(struct ospf_area *area, struct ospf_interface *oi)
{
listnode_delete(area->oiflist, oi);
}
static void add_ospf_interface(struct connected *co, struct ospf_area *area)
{
struct ospf_interface *oi;
oi = ospf_if_new(area->ospf, co->ifp, co->address);
oi->connected = co;
oi->area = area;
oi->params = ospf_lookup_if_params(co->ifp, oi->address->u.prefix4);
oi->output_cost = ospf_if_get_output_cost(oi);
/* Relate ospf interface to ospf instance. */
oi->ospf = area->ospf;
/* update network type as interface flag */
/* If network type is specified previously,
skip network type setting. */
oi->type = IF_DEF_PARAMS(co->ifp)->type;
/* Add pseudo neighbor. */
ospf_nbr_self_reset(oi, oi->ospf->router_id);
ospf_area_add_if(oi->area, oi);
/*
* if router_id is not configured, dont bring up
* interfaces.
* ospf_router_id_update() will call ospf_if_update
* whenever r-id is configured instead.
*/
if ((area->ospf->router_id.s_addr != 0) && if_is_operative(co->ifp))
ospf_if_up(oi);
}
static void update_redistributed(struct ospf *ospf, int add_to_ospf)
{
struct route_node *rn;
struct external_info *ei;
struct ospf_external *ext;
if (ospf_is_type_redistributed(ospf, ZEBRA_ROUTE_CONNECT, 0)) {
ext = ospf_external_lookup(ospf, ZEBRA_ROUTE_CONNECT, 0);
if ((ext) && EXTERNAL_INFO(ext)) {
for (rn = route_top(EXTERNAL_INFO(ext)); rn;
rn = route_next(rn)) {
ei = rn->info;
if (ei == NULL)
continue;