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ospf_zebra.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Zebra connect library for OSPFd
* Copyright (C) 1997, 98, 99, 2000 Kunihiro Ishiguro, Toshiaki Takada
*/
#include <zebra.h>
#include "frrevent.h"
#include "command.h"
#include "network.h"
#include "prefix.h"
#include "routemap.h"
#include "table.h"
#include "stream.h"
#include "memory.h"
#include "zclient.h"
#include "filter.h"
#include "plist.h"
#include "log.h"
#include "route_opaque.h"
#include "lib/bfd.h"
#include "lib/lib_errors.h"
#include "nexthop.h"
#include "ospfd/ospfd.h"
#include "ospfd/ospf_interface.h"
#include "ospfd/ospf_ism.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_asbr.h"
#include "ospfd/ospf_abr.h"
#include "ospfd/ospf_lsa.h"
#include "ospfd/ospf_dump.h"
#include "ospfd/ospf_route.h"
#include "ospfd/ospf_lsdb.h"
#include "ospfd/ospf_neighbor.h"
#include "ospfd/ospf_nsm.h"
#include "ospfd/ospf_zebra.h"
#include "ospfd/ospf_te.h"
#include "ospfd/ospf_sr.h"
#include "ospfd/ospf_ldp_sync.h"
DEFINE_MTYPE_STATIC(OSPFD, OSPF_EXTERNAL, "OSPF External route table");
DEFINE_MTYPE_STATIC(OSPFD, OSPF_REDISTRIBUTE, "OSPF Redistriute");
/* Zebra structure to hold current status. */
struct zclient *zclient = NULL;
/* and for the Synchronous connection to the Label Manager */
struct zclient *zclient_sync;
/* For registering threads. */
extern struct event_loop *master;
/* Router-id update message from zebra. */
static int ospf_router_id_update_zebra(ZAPI_CALLBACK_ARGS)
{
struct ospf *ospf = NULL;
struct prefix router_id;
zebra_router_id_update_read(zclient->ibuf, &router_id);
if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
zlog_debug("Zebra rcvd: router id update %pFX vrf %s id %u",
&router_id, ospf_vrf_id_to_name(vrf_id), vrf_id);
ospf = ospf_lookup_by_vrf_id(vrf_id);
if (ospf != NULL) {
ospf->router_id_zebra = router_id.u.prefix4;
ospf_router_id_update(ospf);
} else {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug(
"%s: ospf instance not found for vrf %s id %u router_id %pFX",
__func__, ospf_vrf_id_to_name(vrf_id), vrf_id,
&router_id);
}
return 0;
}
static int ospf_interface_address_add(ZAPI_CALLBACK_ARGS)
{
struct connected *c;
struct ospf *ospf = NULL;
c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
if (c == NULL)
return 0;
if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
zlog_debug("Zebra: interface %s address add %pFX vrf %s id %u",
c->ifp->name, c->address,
ospf_vrf_id_to_name(vrf_id), vrf_id);
ospf = ospf_lookup_by_vrf_id(vrf_id);
if (!ospf)
return 0;
ospf_if_update(ospf, c->ifp);
ospf_if_interface(c->ifp);
return 0;
}
static int ospf_interface_address_delete(ZAPI_CALLBACK_ARGS)
{
struct connected *c;
struct interface *ifp;
struct ospf_interface *oi;
struct route_node *rn;
struct prefix p;
c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id);
if (c == NULL)
return 0;
if (IS_DEBUG_OSPF(zebra, ZEBRA_INTERFACE))
zlog_debug("Zebra: interface %s address delete %pFX vrf %s id %u",
c->ifp->name, c->address,
ospf_vrf_id_to_name(vrf_id), vrf_id);
ifp = c->ifp;
p = *c->address;
p.prefixlen = IPV4_MAX_BITLEN;
rn = route_node_lookup(IF_OIFS(ifp), &p);
if (!rn) {
connected_free(&c);
return 0;
}
assert(rn->info);
oi = rn->info;
route_unlock_node(rn);
/* Call interface hook functions to clean up */
ospf_if_free(oi);
ospf_if_interface(c->ifp);
connected_free(&c);
return 0;
}
static int ospf_interface_link_params(ZAPI_CALLBACK_ARGS)
{
struct interface *ifp;
bool changed = false;
ifp = zebra_interface_link_params_read(zclient->ibuf, vrf_id, &changed);
if (ifp == NULL || !changed)
return 0;
/* Update TE TLV */
ospf_mpls_te_update_if(ifp);
return 0;
}
/* Nexthop, ifindex, distance and metric information. */
static void ospf_zebra_add_nexthop(struct ospf *ospf, struct ospf_path *path,
struct zapi_route *api)
{
struct zapi_nexthop *api_nh;
struct zapi_nexthop *api_nh_backup;
/* TI-LFA backup path label stack comes first, if present */
if (path->srni.backup_label_stack) {
api_nh_backup = &api->backup_nexthops[api->backup_nexthop_num];
api_nh_backup->vrf_id = ospf->vrf_id;
api_nh_backup->type = NEXTHOP_TYPE_IPV4;
api_nh_backup->gate.ipv4 = path->srni.backup_nexthop;
api_nh_backup->label_num =
path->srni.backup_label_stack->num_labels;
memcpy(api_nh_backup->labels,
path->srni.backup_label_stack->label,
sizeof(mpls_label_t) * api_nh_backup->label_num);
api->backup_nexthop_num++;
}
/* And here comes the primary nexthop */
api_nh = &api->nexthops[api->nexthop_num];
#ifdef HAVE_NETLINK
if (path->unnumbered
|| (path->nexthop.s_addr != INADDR_ANY && path->ifindex != 0)) {
#else /* HAVE_NETLINK */
if (path->nexthop.s_addr != INADDR_ANY && path->ifindex != 0) {
#endif /* HAVE_NETLINK */
api_nh->gate.ipv4 = path->nexthop;
api_nh->ifindex = path->ifindex;
api_nh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
} else if (path->nexthop.s_addr != INADDR_ANY) {
api_nh->gate.ipv4 = path->nexthop;
api_nh->type = NEXTHOP_TYPE_IPV4;
} else {
api_nh->ifindex = path->ifindex;
api_nh->type = NEXTHOP_TYPE_IFINDEX;
}
api_nh->vrf_id = ospf->vrf_id;
/* Set TI-LFA backup nexthop info if present */
if (path->srni.backup_label_stack) {
SET_FLAG(api->message, ZAPI_MESSAGE_BACKUP_NEXTHOPS);
SET_FLAG(api_nh->flags, ZAPI_NEXTHOP_FLAG_HAS_BACKUP);
/* Just care about a single TI-LFA backup path for now */
api_nh->backup_num = 1;
api_nh->backup_idx[0] = api->backup_nexthop_num - 1;
}
api->nexthop_num++;
}
static void ospf_zebra_append_opaque_attr(struct ospf_route *or,
struct zapi_route *api)
{
struct ospf_zebra_opaque ospf_opaque = {};
/* OSPF path type */
snprintf(ospf_opaque.path_type, sizeof(ospf_opaque.path_type), "%s",
ospf_path_type_name(or->path_type));
switch (or->path_type) {
case OSPF_PATH_INTRA_AREA:
case OSPF_PATH_INTER_AREA:
/* OSPF area ID */
(void)inet_ntop(AF_INET, &or->u.std.area_id,
ospf_opaque.area_id,
sizeof(ospf_opaque.area_id));
break;
case OSPF_PATH_TYPE1_EXTERNAL:
case OSPF_PATH_TYPE2_EXTERNAL:
/* OSPF route tag */
snprintf(ospf_opaque.tag, sizeof(ospf_opaque.tag), "%u",
or->u.ext.tag);
break;
default:
break;
}
SET_FLAG(api->message, ZAPI_MESSAGE_OPAQUE);
api->opaque.length = sizeof(struct ospf_zebra_opaque);
memcpy(api->opaque.data, &ospf_opaque, api->opaque.length);
}
void ospf_zebra_add(struct ospf *ospf, struct prefix_ipv4 *p,
struct ospf_route * or)
{
struct zapi_route api;
uint8_t distance;
struct ospf_path *path;
struct listnode *node;
if (ospf->gr_info.restart_in_progress) {
if (IS_DEBUG_OSPF_GR)
zlog_debug("Zebra: Graceful Restart in progress -- not installing %pFX(%s)",
p, ospf_vrf_id_to_name(ospf->vrf_id));
return;
}
memset(&api, 0, sizeof(api));
api.vrf_id = ospf->vrf_id;
api.type = ZEBRA_ROUTE_OSPF;
api.instance = ospf->instance;
api.safi = SAFI_UNICAST;
memcpy(&api.prefix, p, sizeof(*p));
SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP);
/* Metric value. */
SET_FLAG(api.message, ZAPI_MESSAGE_METRIC);
if (or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
api.metric = or->cost + or->u.ext.type2_cost;
else if (or->path_type == OSPF_PATH_TYPE2_EXTERNAL)
api.metric = or->u.ext.type2_cost;
else
api.metric = or->cost;
/* Check if path type is ASE */
if (((or->path_type == OSPF_PATH_TYPE1_EXTERNAL)
|| (or->path_type == OSPF_PATH_TYPE2_EXTERNAL))
&& (or->u.ext.tag > 0) && (or->u.ext.tag <= ROUTE_TAG_MAX)) {
SET_FLAG(api.message, ZAPI_MESSAGE_TAG);
api.tag = or->u.ext.tag;
}
/* Distance value. */
distance = ospf_distance_apply(ospf, p, or);
if (distance) {
SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE);
api.distance = distance;
}
for (ALL_LIST_ELEMENTS_RO(or->paths, node, path)) {
if (api.nexthop_num >= ospf->max_multipath)
break;
ospf_zebra_add_nexthop(ospf, path, &api);
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE)) {
struct interface *ifp;
ifp = if_lookup_by_index(path->ifindex, ospf->vrf_id);
zlog_debug("Zebra: Route add %pFX(%s) nexthop %pI4, ifindex=%d %s",
p, ospf_vrf_id_to_name(ospf->vrf_id),
&path->nexthop, path->ifindex,
ifp ? ifp->name : " ");
}
}
if (CHECK_FLAG(ospf->config, OSPF_SEND_EXTRA_DATA_TO_ZEBRA))
ospf_zebra_append_opaque_attr(or, &api);
zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
}
void ospf_zebra_delete(struct ospf *ospf, struct prefix_ipv4 *p,
struct ospf_route * or)
{
struct zapi_route api;
if (ospf->gr_info.restart_in_progress) {
if (IS_DEBUG_OSPF_GR)
zlog_debug("Zebra: Graceful Restart in progress -- not uninstalling %pFX(%s)",
p, ospf_vrf_id_to_name(ospf->vrf_id));
return;
}
memset(&api, 0, sizeof(api));
api.vrf_id = ospf->vrf_id;
api.type = ZEBRA_ROUTE_OSPF;
api.instance = ospf->instance;
api.safi = SAFI_UNICAST;
memcpy(&api.prefix, p, sizeof(*p));
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Zebra: Route delete %pFX(%s)", p,
ospf_vrf_id_to_name(ospf->vrf_id));
zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
}
void ospf_zebra_add_discard(struct ospf *ospf, struct prefix_ipv4 *p)
{
struct zapi_route api;
if (ospf->gr_info.restart_in_progress) {
if (IS_DEBUG_OSPF_GR)
zlog_debug("Zebra: Graceful Restart in progress -- not installing %pFX(%s)",
p, ospf_vrf_id_to_name(ospf->vrf_id));
return;
}
memset(&api, 0, sizeof(api));
api.vrf_id = ospf->vrf_id;
api.type = ZEBRA_ROUTE_OSPF;
api.instance = ospf->instance;
api.safi = SAFI_UNICAST;
memcpy(&api.prefix, p, sizeof(*p));
zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
zclient_route_send(ZEBRA_ROUTE_ADD, zclient, &api);
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Zebra: Route add discard %pFX(%s)", p,
ospf_vrf_id_to_name(ospf->vrf_id));
}
void ospf_zebra_delete_discard(struct ospf *ospf, struct prefix_ipv4 *p)
{
struct zapi_route api;
if (ospf->gr_info.restart_in_progress) {
if (IS_DEBUG_OSPF_GR)
zlog_debug("Zebra: Graceful Restart in progress -- not uninstalling %pFX(%s)",
p, ospf_vrf_id_to_name(ospf->vrf_id));
return;
}
memset(&api, 0, sizeof(api));
api.vrf_id = ospf->vrf_id;
api.type = ZEBRA_ROUTE_OSPF;
api.instance = ospf->instance;
api.safi = SAFI_UNICAST;
memcpy(&api.prefix, p, sizeof(*p));
zapi_route_set_blackhole(&api, BLACKHOLE_NULL);
zclient_route_send(ZEBRA_ROUTE_DELETE, zclient, &api);
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Zebra: Route delete discard %pFX(%s)", p,
ospf_vrf_id_to_name(ospf->vrf_id));
}
struct ospf_external *ospf_external_lookup(struct ospf *ospf, uint8_t type,
unsigned short instance)
{
struct list *ext_list;
struct listnode *node;
struct ospf_external *ext;
ext_list = ospf->external[type];
if (!ext_list)
return (NULL);
for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext))
if (ext->instance == instance)
return ext;
return NULL;
}
struct ospf_external *ospf_external_add(struct ospf *ospf, uint8_t type,
unsigned short instance)
{
struct list *ext_list;
struct ospf_external *ext;
ext = ospf_external_lookup(ospf, type, instance);
if (ext)
return ext;
if (!ospf->external[type])
ospf->external[type] = list_new();
ext_list = ospf->external[type];
ext = XCALLOC(MTYPE_OSPF_EXTERNAL, sizeof(struct ospf_external));
ext->instance = instance;
EXTERNAL_INFO(ext) = route_table_init();
listnode_add(ext_list, ext);
return ext;
}
/*
* Walk all the ei received from zebra for a route type and apply
* default route-map.
*/
bool ospf_external_default_routemap_apply_walk(struct ospf *ospf,
struct list *ext_list,
struct external_info *default_ei)
{
struct listnode *node;
struct ospf_external *ext;
struct route_node *rn;
struct external_info *ei = NULL;
int ret = 0;
for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) {
if (!ext->external_info)
continue;
for (rn = route_top(ext->external_info); rn;
rn = route_next(rn)) {
ei = rn->info;
if (!ei)
continue;
ret = ospf_external_info_apply_default_routemap(
ospf, ei, default_ei);
if (ret)
break;
}
}
if (ret && ei) {
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug("Default originate routemap permit ei: %pI4(%s)",
&ei->p.prefix,
ospf_vrf_id_to_name(ospf->vrf_id));
return true;
}
return false;
}
/*
* Function to originate or flush default after applying
* route-map on all ei.
*/
static void ospf_external_lsa_default_routemap_timer(struct event *thread)
{
struct list *ext_list;
struct ospf *ospf = EVENT_ARG(thread);
struct prefix_ipv4 p;
int type;
int ret = 0;
struct ospf_lsa *lsa;
struct external_info *default_ei;
p.family = AF_INET;
p.prefixlen = 0;
p.prefix.s_addr = INADDR_ANY;
/* Get the default extenal info. */
default_ei = ospf_external_info_lookup(ospf, DEFAULT_ROUTE,
ospf->instance, &p);
if (!default_ei) {
/* Nothing to be done here. */
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug("Default originate info not present(%s)",
ospf_vrf_id_to_name(ospf->vrf_id));
return;
}
/* For all the ei apply route-map */
for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
ext_list = ospf->external[type];
if (!ext_list || type == ZEBRA_ROUTE_OSPF)
continue;
ret = ospf_external_default_routemap_apply_walk(ospf, ext_list,
default_ei);
if (ret)
break;
}
/* Get the default LSA. */
lsa = ospf_external_info_find_lsa(ospf, &p);
/* If permit then originate default. */
if (ret && !lsa)
ospf_external_lsa_originate(ospf, default_ei);
else if (ret && lsa && IS_LSA_MAXAGE(lsa))
ospf_external_lsa_refresh(ospf, lsa, default_ei, true, false);
else if (!ret && lsa)
ospf_external_lsa_flush(ospf, DEFAULT_ROUTE, &default_ei->p, 0);
}
void ospf_external_del(struct ospf *ospf, uint8_t type, unsigned short instance)
{
struct ospf_external *ext;
ext = ospf_external_lookup(ospf, type, instance);
if (ext) {
if (EXTERNAL_INFO(ext))
route_table_finish(EXTERNAL_INFO(ext));
listnode_delete(ospf->external[type], ext);
if (!ospf->external[type]->count)
list_delete(&ospf->external[type]);
XFREE(MTYPE_OSPF_EXTERNAL, ext);
}
/*
* Check if default needs to be flushed too.
*/
event_add_event(master, ospf_external_lsa_default_routemap_timer, ospf,
0, &ospf->t_default_routemap_timer);
}
/* Update NHLFE for Prefix SID */
void ospf_zebra_update_prefix_sid(const struct sr_prefix *srp)
{
struct zapi_labels zl;
struct zapi_nexthop *znh;
struct zapi_nexthop *znh_backup;
struct listnode *node;
struct ospf_path *path;
/* Prepare message. */
memset(&zl, 0, sizeof(zl));
zl.type = ZEBRA_LSP_OSPF_SR;
zl.local_label = srp->label_in;
switch (srp->type) {
case LOCAL_SID:
/* Set Label for local Prefix */
znh = &zl.nexthops[zl.nexthop_num++];
znh->type = NEXTHOP_TYPE_IFINDEX;
znh->ifindex = srp->nhlfe.ifindex;
znh->label_num = 1;
znh->labels[0] = srp->nhlfe.label_out;
osr_debug("SR (%s): Configure Prefix %pFX with labels %u/%u",
__func__, (struct prefix *)&srp->prefv4,
srp->label_in, srp->nhlfe.label_out);
break;
case PREF_SID:
/* Update route in the RIB too. */
SET_FLAG(zl.message, ZAPI_LABELS_FTN);
zl.route.prefix.u.prefix4 = srp->prefv4.prefix;
zl.route.prefix.prefixlen = srp->prefv4.prefixlen;
zl.route.prefix.family = srp->prefv4.family;
zl.route.type = ZEBRA_ROUTE_OSPF;
zl.route.instance = 0;
/* Check that SRP contains at least one valid path */
if (srp->route == NULL) {
return;
}
osr_debug("SR (%s): Configure Prefix %pFX with",
__func__, (struct prefix *)&srp->prefv4);
for (ALL_LIST_ELEMENTS_RO(srp->route->paths, node, path)) {
if (path->srni.label_out == MPLS_INVALID_LABEL)
continue;
if (zl.nexthop_num >= MULTIPATH_NUM)
break;
/*
* TI-LFA backup path label stack comes first, if
* present.
*/
if (path->srni.backup_label_stack) {
znh_backup = &zl.backup_nexthops
[zl.backup_nexthop_num++];
znh_backup->type = NEXTHOP_TYPE_IPV4;
znh_backup->gate.ipv4 =
path->srni.backup_nexthop;
memcpy(znh_backup->labels,
path->srni.backup_label_stack->label,
sizeof(mpls_label_t)
* path->srni.backup_label_stack
->num_labels);
znh_backup->label_num =
path->srni.backup_label_stack
->num_labels;
if (path->srni.label_out
!= MPLS_LABEL_IPV4_EXPLICIT_NULL
&& path->srni.label_out
!= MPLS_LABEL_IMPLICIT_NULL)
znh_backup->labels
[znh_backup->label_num++] =
path->srni.label_out;
}
znh = &zl.nexthops[zl.nexthop_num++];
znh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
znh->gate.ipv4 = path->nexthop;
znh->ifindex = path->ifindex;
znh->label_num = 1;
znh->labels[0] = path->srni.label_out;
osr_debug(" |- labels %u/%u", srp->label_in,
path->srni.label_out);
/* Set TI-LFA backup nexthop info if present */
if (path->srni.backup_label_stack) {
SET_FLAG(zl.message, ZAPI_LABELS_HAS_BACKUPS);
SET_FLAG(znh->flags,
ZAPI_NEXTHOP_FLAG_HAS_BACKUP);
/* Just care about a single TI-LFA backup path
* for now */
znh->backup_num = 1;
znh->backup_idx[0] = zl.backup_nexthop_num - 1;
}
}
break;
case ADJ_SID:
case LAN_ADJ_SID:
return;
}
/* Finally, send message to zebra. */
(void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_REPLACE, &zl);
}
/* Remove NHLFE for Prefix-SID */
void ospf_zebra_delete_prefix_sid(const struct sr_prefix *srp)
{
struct zapi_labels zl;
osr_debug("SR (%s): Delete Labels %u for Prefix %pFX", __func__,
srp->label_in, (struct prefix *)&srp->prefv4);
/* Prepare message. */
memset(&zl, 0, sizeof(zl));
zl.type = ZEBRA_LSP_OSPF_SR;
zl.local_label = srp->label_in;
if (srp->type == PREF_SID) {
/* Update route in the RIB too */
SET_FLAG(zl.message, ZAPI_LABELS_FTN);
zl.route.prefix.u.prefix4 = srp->prefv4.prefix;
zl.route.prefix.prefixlen = srp->prefv4.prefixlen;
zl.route.prefix.family = srp->prefv4.family;
zl.route.type = ZEBRA_ROUTE_OSPF;
zl.route.instance = 0;
}
/* Send message to zebra. */
(void)zebra_send_mpls_labels(zclient, ZEBRA_MPLS_LABELS_DELETE, &zl);
}
/* Send MPLS Label entry to Zebra for installation or deletion */
void ospf_zebra_send_adjacency_sid(int cmd, struct sr_nhlfe nhlfe)
{
struct zapi_labels zl;
struct zapi_nexthop *znh;
osr_debug("SR (%s): %s Labels %u/%u for Adjacency via %u", __func__,
cmd == ZEBRA_MPLS_LABELS_ADD ? "Add" : "Delete",
nhlfe.label_in, nhlfe.label_out, nhlfe.ifindex);
memset(&zl, 0, sizeof(zl));
zl.type = ZEBRA_LSP_OSPF_SR;
zl.local_label = nhlfe.label_in;
zl.nexthop_num = 1;
znh = &zl.nexthops[0];
znh->type = NEXTHOP_TYPE_IPV4_IFINDEX;
znh->gate.ipv4 = nhlfe.nexthop;
znh->ifindex = nhlfe.ifindex;
znh->label_num = 1;
znh->labels[0] = nhlfe.label_out;
(void)zebra_send_mpls_labels(zclient, cmd, &zl);
}
struct ospf_redist *ospf_redist_lookup(struct ospf *ospf, uint8_t type,
unsigned short instance)
{
struct list *red_list;
struct listnode *node;
struct ospf_redist *red;
red_list = ospf->redist[type];
if (!red_list)
return (NULL);
for (ALL_LIST_ELEMENTS_RO(red_list, node, red))
if (red->instance == instance)
return red;
return NULL;
}
struct ospf_redist *ospf_redist_add(struct ospf *ospf, uint8_t type,
unsigned short instance)
{
struct list *red_list;
struct ospf_redist *red;
red = ospf_redist_lookup(ospf, type, instance);
if (red)
return red;
if (!ospf->redist[type])
ospf->redist[type] = list_new();
red_list = ospf->redist[type];
red = XCALLOC(MTYPE_OSPF_REDISTRIBUTE, sizeof(struct ospf_redist));
red->instance = instance;
red->dmetric.type = -1;
red->dmetric.value = -1;
ROUTEMAP_NAME(red) = NULL;
ROUTEMAP(red) = NULL;
listnode_add(red_list, red);
return red;
}
void ospf_redist_del(struct ospf *ospf, uint8_t type, unsigned short instance)
{
struct ospf_redist *red;
red = ospf_redist_lookup(ospf, type, instance);
if (red) {
listnode_delete(ospf->redist[type], red);
if (!ospf->redist[type]->count) {
list_delete(&ospf->redist[type]);
}
ospf_routemap_unset(red);
XFREE(MTYPE_OSPF_REDISTRIBUTE, red);
}
}
int ospf_is_type_redistributed(struct ospf *ospf, int type,
unsigned short instance)
{
return (DEFAULT_ROUTE_TYPE(type)
? vrf_bitmap_check(
&zclient->default_information[AFI_IP],
ospf->vrf_id)
: ((instance &&
redist_check_instance(
&zclient->mi_redist[AFI_IP][type],
instance)) ||
(!instance &&
vrf_bitmap_check(&zclient->redist[AFI_IP][type],
ospf->vrf_id))));
}
int ospf_redistribute_update(struct ospf *ospf, struct ospf_redist *red,
int type, unsigned short instance, int mtype,
int mvalue)
{
int force = 0;
if (mtype != red->dmetric.type) {
red->dmetric.type = mtype;
force = LSA_REFRESH_FORCE;
}
if (mvalue != red->dmetric.value) {
red->dmetric.value = mvalue;
force = LSA_REFRESH_FORCE;
}
ospf_external_lsa_refresh_type(ospf, type, instance, force);
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[%s][%d][%s]: Refresh Type[%d], Metric[%d]",
ospf_redist_string(type), instance,
ospf_vrf_id_to_name(ospf->vrf_id),
metric_type(ospf, type, instance),
metric_value(ospf, type, instance));
return CMD_SUCCESS;
}
int ospf_redistribute_set(struct ospf *ospf, struct ospf_redist *red, int type,
unsigned short instance, int mtype, int mvalue)
{
red->dmetric.type = mtype;
red->dmetric.value = mvalue;
ospf_external_add(ospf, type, instance);
zclient_redistribute(ZEBRA_REDISTRIBUTE_ADD, zclient, AFI_IP, type,
instance, ospf->vrf_id);
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[%s][%d][%s]: Start Type[%d], Metric[%d]",
ospf_redist_string(type), instance,
ospf_vrf_id_to_name(ospf->vrf_id),
metric_type(ospf, type, instance),
metric_value(ospf, type, instance));
ospf_asbr_status_update(ospf, ++ospf->redistribute);
return CMD_SUCCESS;
}
int ospf_redistribute_unset(struct ospf *ospf, int type,
unsigned short instance)
{
if (type == zclient->redist_default && instance == zclient->instance)
return CMD_SUCCESS;
zclient_redistribute(ZEBRA_REDISTRIBUTE_DELETE, zclient, AFI_IP, type,
instance, ospf->vrf_id);
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[%s][%d][%s]: Stop",
ospf_redist_string(type), instance,
ospf_vrf_id_to_name(ospf->vrf_id));
/* Remove the routes from OSPF table. */
ospf_redistribute_withdraw(ospf, type, instance);
ospf_external_del(ospf, type, instance);
ospf_asbr_status_update(ospf, --ospf->redistribute);
return CMD_SUCCESS;
}
int ospf_redistribute_default_set(struct ospf *ospf, int originate, int mtype,
int mvalue)
{
struct prefix_ipv4 p;
struct in_addr nexthop;
int cur_originate = ospf->default_originate;
const char *type_str = NULL;
nexthop.s_addr = INADDR_ANY;
p.family = AF_INET;
p.prefix.s_addr = INADDR_ANY;
p.prefixlen = 0;
ospf->default_originate = originate;
if (cur_originate == originate) {
/* Refresh the lsa since metric might different */
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[%s][%s]: Refresh Type[%d], Metric[%d]",
ospf_redist_string(DEFAULT_ROUTE),
ospf_vrf_id_to_name(ospf->vrf_id),
metric_type(ospf, DEFAULT_ROUTE, 0),
metric_value(ospf, DEFAULT_ROUTE, 0));
ospf_external_lsa_refresh_default(ospf);
return CMD_SUCCESS;
}
switch (cur_originate) {
case DEFAULT_ORIGINATE_NONE:
break;
case DEFAULT_ORIGINATE_ZEBRA:
zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_DELETE,
zclient, AFI_IP, ospf->vrf_id);
ospf->redistribute--;
break;
case DEFAULT_ORIGINATE_ALWAYS:
ospf_external_info_delete(ospf, DEFAULT_ROUTE, 0, p);
ospf_external_del(ospf, DEFAULT_ROUTE, 0);
ospf->redistribute--;
break;
}
switch (originate) {
case DEFAULT_ORIGINATE_NONE:
type_str = "none";
break;
case DEFAULT_ORIGINATE_ZEBRA:
type_str = "normal";
ospf->redistribute++;
zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD,
zclient, AFI_IP, ospf->vrf_id);
break;
case DEFAULT_ORIGINATE_ALWAYS:
type_str = "always";
ospf->redistribute++;
ospf_external_add(ospf, DEFAULT_ROUTE, 0);
ospf_external_info_add(ospf, DEFAULT_ROUTE, 0, p, 0, nexthop, 0,
DEFAULT_DEFAULT_METRIC);
break;
}
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug("Redistribute[DEFAULT][%s]: %s Type[%d], Metric[%d]",
ospf_vrf_id_to_name(ospf->vrf_id), type_str,
metric_type(ospf, DEFAULT_ROUTE, 0),
metric_value(ospf, DEFAULT_ROUTE, 0));
ospf_external_lsa_refresh_default(ospf);
ospf_asbr_status_update(ospf, ospf->redistribute);
return CMD_SUCCESS;
}
static int ospf_external_lsa_originate_check(struct ospf *ospf,
struct external_info *ei)
{
/* If prefix is multicast, then do not originate LSA. */
if (IN_MULTICAST(htonl(ei->p.prefix.s_addr))) {
zlog_info(
"LSA[Type5:%pI4]: Not originate AS-external-LSA, Prefix belongs multicast",
&ei->p.prefix);
return 0;
}
/* Take care of default-originate. */
if (is_default_prefix4(&ei->p))
if (ospf->default_originate == DEFAULT_ORIGINATE_NONE) {
zlog_info(
"LSA[Type5:0.0.0.0]: Not originate AS-external-LSA for default");
return 0;
}
return 1;
}
/* If connected prefix is OSPF enable interface, then do not announce. */
int ospf_distribute_check_connected(struct ospf *ospf, struct external_info *ei)
{
struct listnode *node;
struct ospf_interface *oi;
for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi))
if (prefix_match(oi->address, (struct prefix *)&ei->p))
return 0;
return 1;
}
/* Apply default route-map on ei received. */
int ospf_external_info_apply_default_routemap(struct ospf *ospf,
struct external_info *ei,
struct external_info *default_ei)
{
struct ospf_redist *red;
int type = default_ei->type;
struct prefix_ipv4 *p = &ei->p;
struct route_map_set_values save_values;