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frr/ospfd/ospf_zebra.c
Daniel Baumann 3124f89aed
Adding upstream version 10.1.1. 
Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:03:58 +01:00

2226 lines
55 KiB
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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",
c->ifp->name, c->address);
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",
p);
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 nexthop %pI4, ifindex=%d %s",
p, &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",
p);
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", p);
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",
p);
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", p);
}
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",
p);
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", p);
}
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",
&ei->p.prefix);
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");
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]: Refresh Type[%d], Metric[%d]",
ospf_redist_string(type), instance,
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] vrf id %u: Start Type[%d], Metric[%d]",
ospf_redist_string(type), instance, 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] vrf id %u: Stop",
ospf_redist_string(type), instance, 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]: Refresh Type[%d], Metric[%d]",
ospf_redist_string(DEFAULT_ROUTE),
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 Type[%d], Metric[%d]",
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;
if (!ospf_external_lsa_originate_check(ospf, default_ei))
return 0;
save_values = default_ei->route_map_set;
ospf_reset_route_map_set_values(&default_ei->route_map_set);
/* apply route-map if needed */
red = ospf_redist_lookup(ospf, type, ospf->instance);
if (red && ROUTEMAP_NAME(red)) {
route_map_result_t ret;
ret = route_map_apply(ROUTEMAP(red), (struct prefix *)p, ei);
if (ret == RMAP_DENYMATCH) {
ei->route_map_set = save_values;
return 0;
}
}
return 1;
}
/*
* Default originated is based on route-map condition then
* apply route-map on received external info. Originate or
* flush based on route-map condition.
*/
static bool ospf_external_lsa_default_routemap_apply(struct ospf *ospf,
struct external_info *ei,
int cmd)
{
struct external_info *default_ei;
struct prefix_ipv4 p;
struct ospf_lsa *lsa;
int ret;
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. */
return false;
}
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug("Apply default originate routemap on ei: %pI4 cmd: %d",
&ei->p.prefix, cmd);
ret = ospf_external_info_apply_default_routemap(ospf, ei, default_ei);
/* If deny then nothing to be done both in add and del case. */
if (!ret) {
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug("Default originte routemap deny for ei: %pI4",
&ei->p.prefix);
return false;
}
/* Get the default LSA. */
lsa = ospf_external_info_find_lsa(ospf, &p);
/* If this is add route and permit then ooriginate default. */
if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
/* If permit and default already advertise then return. */
if (lsa && !IS_LSA_MAXAGE(lsa)) {
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug("Default lsa already originated");
return true;
}
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug("Originating/Refreshing default lsa");
if (lsa && IS_LSA_MAXAGE(lsa))
/* Refresh lsa.*/
ospf_external_lsa_refresh(ospf, lsa, default_ei, true,
false);
else
/* If permit and default not advertised then advertise.
*/
ospf_external_lsa_originate(ospf, default_ei);
} else if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_DEL) {
/* If deny and lsa is not originated then nothing to be done.*/
if (!lsa) {
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug(
"Default lsa not originated, not flushing");
return true;
}
if (IS_DEBUG_OSPF_DEFAULT_INFO)
zlog_debug(
"Running default route-map again as ei: %pI4 deleted",
&ei->p.prefix);
/*
* if this route delete was permitted then we need to check
* there are any other external info which can still trigger
* default route origination else flush it.
*/
event_add_event(master,
ospf_external_lsa_default_routemap_timer, ospf,
0, &ospf->t_default_routemap_timer);
}
return true;
}
/* return 1 if external LSA must be originated, 0 otherwise */
int ospf_redistribute_check(struct ospf *ospf, struct external_info *ei,
int *changed)
{
struct route_map_set_values save_values;
struct prefix_ipv4 *p = &ei->p;
struct ospf_redist *red;
uint8_t type = is_default_prefix4(&ei->p) ? DEFAULT_ROUTE : ei->type;
unsigned short instance = is_default_prefix4(&ei->p) ? 0 : ei->instance;
route_tag_t saved_tag = 0;
/* Default is handled differently. */
if (type == DEFAULT_ROUTE)
return 1;
if (changed)
*changed = 0;
if (!ospf_external_lsa_originate_check(ospf, ei))
return 0;
/* Take care connected route. */
if (type == ZEBRA_ROUTE_CONNECT
&& !ospf_distribute_check_connected(ospf, ei))
return 0;
if (!DEFAULT_ROUTE_TYPE(type) && DISTRIBUTE_NAME(ospf, type))
/* distirbute-list exists, but access-list may not? */
if (DISTRIBUTE_LIST(ospf, type))
if (access_list_apply(DISTRIBUTE_LIST(ospf, type), p)
== FILTER_DENY) {
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug(
"Redistribute[%s]: %pFX filtered by distribute-list.",
ospf_redist_string(type), p);
return 0;
}
save_values = ei->route_map_set;
ospf_reset_route_map_set_values(&ei->route_map_set);
saved_tag = ei->tag;
/* Resetting with original route tag */
ei->tag = ei->orig_tag;
/* apply route-map if needed */
red = ospf_redist_lookup(ospf, type, instance);
if (red && ROUTEMAP_NAME(red)) {
route_map_result_t ret;
ret = route_map_apply(ROUTEMAP(red), (struct prefix *)p, ei);
if (ret == RMAP_DENYMATCH) {
ei->route_map_set = save_values;
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug(
"Redistribute[%s]: %pFX filtered by route-map.",
ospf_redist_string(type), p);
return 0;
}
/* check if 'route-map set' changed something */
if (changed) {
*changed = !ospf_route_map_set_compare(
&ei->route_map_set, &save_values);
/* check if tag is modified */
*changed |= (saved_tag != ei->tag);
}
}
return 1;
}
/* OSPF route-map set for redistribution */
void ospf_routemap_set(struct ospf_redist *red, const char *name)
{
if (ROUTEMAP_NAME(red)) {
route_map_counter_decrement(ROUTEMAP(red));
free(ROUTEMAP_NAME(red));
}
ROUTEMAP_NAME(red) = strdup(name);
ROUTEMAP(red) = route_map_lookup_by_name(name);
route_map_counter_increment(ROUTEMAP(red));
}
void ospf_routemap_unset(struct ospf_redist *red)
{
if (ROUTEMAP_NAME(red)) {
route_map_counter_decrement(ROUTEMAP(red));
free(ROUTEMAP_NAME(red));
}
ROUTEMAP_NAME(red) = NULL;
ROUTEMAP(red) = NULL;
}
static int ospf_zebra_gr_update(struct ospf *ospf, int command,
uint32_t stale_time)
{
struct zapi_cap api;
if (!zclient || zclient->sock < 0 || !ospf)
return 1;
memset(&api, 0, sizeof(api));
api.cap = command;
api.stale_removal_time = stale_time;
api.vrf_id = ospf->vrf_id;
(void)zclient_capabilities_send(ZEBRA_CLIENT_CAPABILITIES, zclient,
&api);
return 0;
}
int ospf_zebra_gr_enable(struct ospf *ospf, uint32_t stale_time)
{
if (IS_DEBUG_OSPF_GR)
zlog_debug("Zebra enable GR [stale time %u]", stale_time);
return ospf_zebra_gr_update(ospf, ZEBRA_CLIENT_GR_CAPABILITIES,
stale_time);
}
int ospf_zebra_gr_disable(struct ospf *ospf)
{
if (IS_DEBUG_OSPF_GR)
zlog_debug("Zebra disable GR");
return ospf_zebra_gr_update(ospf, ZEBRA_CLIENT_GR_DISABLE, 0);
}
/* Zebra route add and delete treatment. */
static int ospf_zebra_read_route(ZAPI_CALLBACK_ARGS)
{
struct zapi_route api;
struct prefix_ipv4 p;
struct prefix pgen;
unsigned long ifindex;
struct in_addr nexthop;
struct external_info *ei;
struct ospf *ospf;
int i;
uint8_t rt_type;
ospf = ospf_lookup_by_vrf_id(vrf_id);
if (ospf == NULL)
return 0;
if (zapi_route_decode(zclient->ibuf, &api) < 0)
return -1;
ifindex = api.nexthops[0].ifindex;
nexthop = api.nexthops[0].gate.ipv4;
rt_type = api.type;
memcpy(&p, &api.prefix, sizeof(p));
if (IPV4_NET127(ntohl(p.prefix.s_addr)))
return 0;
pgen.family = p.family;
pgen.prefixlen = p.prefixlen;
pgen.u.prefix4 = p.prefix;
/* Re-destributed route is default route.
* Here, route type is used as 'ZEBRA_ROUTE_KERNEL' for
* updating ex-info. But in resetting (no default-info
* originate)ZEBRA_ROUTE_MAX is used to delete the ex-info.
* Resolved this inconsistency by maintaining same route type.
*/
if ((is_default_prefix(&pgen)) && (api.type != ZEBRA_ROUTE_OSPF))
rt_type = DEFAULT_ROUTE;
if (IS_DEBUG_OSPF(zebra, ZEBRA_REDISTRIBUTE))
zlog_debug(
"%s: cmd %s from client %s: vrf_id %d, p %pFX, metric %d",
__func__, zserv_command_string(cmd),
zebra_route_string(api.type), vrf_id, &api.prefix,
api.metric);
if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_ADD) {
/* XXX|HACK|TODO|FIXME:
* Maybe we should ignore reject/blackhole routes? Testing
* shows that there is no problems though and this is only way
* to "summarize" routes in ASBR at the moment. Maybe we need
* just a better generalised solution for these types?
*/
/* Protocol tag overwrites all other tag value sent by zebra */
if (ospf->dtag[rt_type] > 0)
api.tag = ospf->dtag[rt_type];
/*
* Given zebra sends update for a prefix via ADD message, it
* should
* be considered as an implicit DEL for that prefix with other
* source
* types.
*/
for (i = 0; i <= ZEBRA_ROUTE_MAX; i++)
if (i != rt_type)
ospf_external_info_delete(ospf, i, api.instance,
p);
ei = ospf_external_info_add(ospf, rt_type, api.instance, p,
ifindex, nexthop, api.tag,
api.metric);
if (ei == NULL) {
/* Nothing has changed, so nothing to do; return */
return 0;
}
if (ospf->router_id.s_addr != INADDR_ANY) {
if (is_default_prefix4(&p))
ospf_external_lsa_refresh_default(ospf);
else {
struct ospf_external_aggr_rt *aggr;
struct as_external_lsa *al;
struct ospf_lsa *lsa = NULL;
struct in_addr mask;
aggr = ospf_external_aggr_match(ospf, &ei->p);
if (aggr) {
/* Check the AS-external-LSA
* should be originated.
*/
if (!ospf_redistribute_check(ospf, ei,
NULL))
return 0;
if (IS_DEBUG_OSPF(lsa, EXTNL_LSA_AGGR))
zlog_debug(
"%s: Send Aggreate LSA (%pI4/%d)",
__func__,
&aggr->p.prefix,
aggr->p.prefixlen);
ospf_originate_summary_lsa(ospf, aggr,
ei);
/* Handling the case where the
* external route prefix
* and aggegate prefix is same
* If same don't flush the
* originated
* external LSA.
*/
if (prefix_same(
(struct prefix *)&aggr->p,
(struct prefix *)&ei->p))
return 0;
lsa = ospf_external_info_find_lsa(
ospf, &ei->p);
if (lsa) {
al = (struct as_external_lsa *)
lsa->data;
masklen2ip(ei->p.prefixlen,
&mask);
if (mask.s_addr
!= al->mask.s_addr)
return 0;
ospf_external_lsa_flush(
ospf, ei->type, &ei->p,
0);
}
} else {
struct ospf_lsa *current;
current = ospf_external_info_find_lsa(
ospf, &ei->p);
if (!current) {
/* Check the
* AS-external-LSA
* should be
* originated.
*/
if (!ospf_redistribute_check(
ospf, ei, NULL))
return 0;
ospf_external_lsa_originate(
ospf, ei);
} else {
if (IS_DEBUG_OSPF(
zebra,
ZEBRA_REDISTRIBUTE))
zlog_debug(
"%s: %pI4 refreshing LSA",
__func__,
&p.prefix);
ospf_external_lsa_refresh(
ospf, current, ei,
LSA_REFRESH_FORCE,
false);
}
}
}
}
/*
* Check if default-information originate is
* with some routemap prefix/access list match.
*/
ospf_external_lsa_default_routemap_apply(ospf, ei, cmd);
} else { /* if (cmd == ZEBRA_REDISTRIBUTE_ROUTE_DEL) */
struct ospf_external_aggr_rt *aggr;
ei = ospf_external_info_lookup(ospf, rt_type, api.instance, &p);
if (ei == NULL)
return 0;
/*
* Check if default-information originate i
* with some routemap prefix/access list match.
* Apply before ei is deleted.
*/
ospf_external_lsa_default_routemap_apply(ospf, ei, cmd);
aggr = ospf_external_aggr_match(ospf, &ei->p);
if (aggr && (ei->aggr_route == aggr)) {
ospf_unlink_ei_from_aggr(ospf, aggr, ei);
ospf_external_info_delete(ospf, rt_type, api.instance,
p);
} else {
ospf_external_info_delete(ospf, rt_type, api.instance,
p);
if (is_default_prefix4(&p))
ospf_external_lsa_refresh_default(ospf);
else
ospf_external_lsa_flush(ospf, rt_type, &p,
ifindex /*, nexthop */);
}
}
return 0;
}
void ospf_zebra_import_default_route(struct ospf *ospf, bool unreg)
{
struct prefix prefix = {};
int command;
if (zclient->sock < 0) {
if (IS_DEBUG_OSPF(zebra, ZEBRA))
zlog_debug(" Not connected to Zebra");
return;
}
prefix.family = AF_INET;
prefix.prefixlen = 0;
if (unreg)
command = ZEBRA_NEXTHOP_UNREGISTER;
else
command = ZEBRA_NEXTHOP_REGISTER;
if (IS_DEBUG_OSPF(zebra, ZEBRA))
zlog_debug("%s: sending cmd %s for %pFX (vrf %u)", __func__,
zserv_command_string(command), &prefix,
ospf->vrf_id);
if (zclient_send_rnh(zclient, command, &prefix, SAFI_UNICAST, false,
true, ospf->vrf_id) == ZCLIENT_SEND_FAILURE)
flog_err(EC_LIB_ZAPI_SOCKET, "%s: zclient_send_rnh() failed",
__func__);
}
static void ospf_zebra_import_check_update(struct vrf *vrf, struct prefix *match,
struct zapi_route *nhr)
{
struct ospf *ospf = vrf->info;
if (ospf == NULL || !IS_OSPF_ASBR(ospf))
return;
if (match->family != AF_INET || match->prefixlen != 0 ||
nhr->type == ZEBRA_ROUTE_OSPF)
return;
ospf->nssa_default_import_check.status = !!nhr->nexthop_num;
ospf_abr_nssa_type7_defaults(ospf);
}
int ospf_distribute_list_out_set(struct ospf *ospf, int type, const char *name)
{
/* Lookup access-list for distribute-list. */
DISTRIBUTE_LIST(ospf, type) = access_list_lookup(AFI_IP, name);
/* Clear previous distribute-name. */
if (DISTRIBUTE_NAME(ospf, type))
free(DISTRIBUTE_NAME(ospf, type));
/* Set distribute-name. */
DISTRIBUTE_NAME(ospf, type) = strdup(name);
/* If access-list have been set, schedule update timer. */
if (DISTRIBUTE_LIST(ospf, type))
ospf_distribute_list_update(ospf, type, 0);
return CMD_SUCCESS;
}
int ospf_distribute_list_out_unset(struct ospf *ospf, int type,
const char *name)
{
/* Schedule update timer. */
if (DISTRIBUTE_LIST(ospf, type))
ospf_distribute_list_update(ospf, type, 0);
/* Unset distribute-list. */
DISTRIBUTE_LIST(ospf, type) = NULL;
/* Clear distribute-name. */
if (DISTRIBUTE_NAME(ospf, type))
free(DISTRIBUTE_NAME(ospf, type));
DISTRIBUTE_NAME(ospf, type) = NULL;
return CMD_SUCCESS;
}
/* distribute-list update timer. */
static void ospf_distribute_list_update_timer(struct event *thread)
{
struct route_node *rn;
struct external_info *ei;
struct route_table *rt;
struct ospf_lsa *lsa;
int type, default_refresh = 0;
struct ospf *ospf = EVENT_ARG(thread);
if (ospf == NULL)
return;
ospf->t_distribute_update = NULL;
zlog_info("Zebra[Redistribute]: distribute-list update timer fired!");
if (IS_DEBUG_OSPF_EVENT) {
zlog_debug("%s: ospf distribute-list update vrf %s id %d",
__func__, ospf_vrf_id_to_name(ospf->vrf_id),
ospf->vrf_id);
}
/* foreach all external info. */
for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
struct list *ext_list;
struct listnode *node;
struct ospf_external *ext;
ext_list = ospf->external[type];
if (!ext_list)
continue;
for (ALL_LIST_ELEMENTS_RO(ext_list, node, ext)) {
rt = ext->external_info;
if (!rt)
continue;
for (rn = route_top(rt); rn; rn = route_next(rn)) {
ei = rn->info;
if (!ei)
continue;
if (is_default_prefix4(&ei->p))
default_refresh = 1;
else {
struct ospf_external_aggr_rt *aggr;
aggr = ospf_external_aggr_match(ospf,
&ei->p);
if (aggr) {
/* Check the
* AS-external-LSA
* should be originated.
*/
if (!ospf_redistribute_check(
ospf, ei, NULL)) {
ospf_unlink_ei_from_aggr(
ospf, aggr, ei);
continue;
}
if (IS_DEBUG_OSPF(
lsa,
EXTNL_LSA_AGGR))
zlog_debug(
"%s: Send Aggregate LSA (%pI4/%d)",
__func__,
&aggr->p.prefix,
aggr->p.prefixlen);
/* Originate Aggregate
* LSA
*/
ospf_originate_summary_lsa(
ospf, aggr, ei);
} else if (
(lsa = ospf_external_info_find_lsa(
ospf, &ei->p))) {
int force =
LSA_REFRESH_IF_CHANGED;
/* If this is a MaxAge
* LSA, we need to
* force refresh it
* because distribute
* settings might have
* changed and now,
* this LSA needs to be
* originated, not be
* removed.
* If we don't force
* refresh it, it will
* remain a MaxAge LSA
* because it will look
* like it hasn't
* changed. Neighbors
* will not receive
* updates for this LSA.
*/
if (IS_LSA_MAXAGE(lsa))
force = LSA_REFRESH_FORCE;
ospf_external_lsa_refresh(
ospf, lsa, ei, force,
false);
} else {
if (!ospf_redistribute_check(
ospf, ei, NULL))
continue;
ospf_external_lsa_originate(
ospf, ei);
}
}
}
}
}
if (default_refresh)
ospf_external_lsa_refresh_default(ospf);
}
/* Update distribute-list and set timer to apply access-list. */
void ospf_distribute_list_update(struct ospf *ospf, int type,
unsigned short instance)
{
struct ospf_external *ext;
/* External info does not exist. */
ext = ospf_external_lookup(ospf, type, instance);
if (!ext || !EXTERNAL_INFO(ext))
return;
/* Set timer. If timer is already started, this call does nothing. */
event_add_timer_msec(master, ospf_distribute_list_update_timer, ospf,
ospf->min_ls_interval, &ospf->t_distribute_update);
}
/* If access-list is updated, apply some check. */
static void ospf_filter_update(struct access_list *access)
{
struct ospf *ospf;
int type;
int abr_inv = 0;
struct ospf_area *area;
struct listnode *node, *n1;
/* If OSPF instance does not exist, return right now. */
if (listcount(om->ospf) == 0)
return;
/* Iterate all ospf [VRF] instances */
for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
/* Update distribute-list, and apply filter. */
for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
struct list *red_list;
struct ospf_redist *red;
red_list = ospf->redist[type];
if (red_list)
for (ALL_LIST_ELEMENTS_RO(red_list, node,
red)) {
if (ROUTEMAP(red)) {
/* if route-map is not NULL it
* may be
* using this access list */
ospf_distribute_list_update(
ospf, type,
red->instance);
}
}
/* There is place for route-map for default-information
* (ZEBRA_ROUTE_MAX),
* but no distribute list. */
if (type == ZEBRA_ROUTE_MAX)
break;
if (DISTRIBUTE_NAME(ospf, type)) {
/* Keep old access-list for distribute-list. */
struct access_list *old =
DISTRIBUTE_LIST(ospf, type);
/* Update access-list for distribute-list. */
DISTRIBUTE_LIST(ospf, type) =
access_list_lookup(
AFI_IP,
DISTRIBUTE_NAME(ospf, type));
/* No update for this distribute type. */
if (old == NULL
&& DISTRIBUTE_LIST(ospf, type) == NULL)
continue;
/* Schedule distribute-list update timer. */
if (DISTRIBUTE_LIST(ospf, type) == NULL
|| strcmp(DISTRIBUTE_NAME(ospf, type),
access->name)
== 0)
ospf_distribute_list_update(ospf, type,
0);
}
}
/* Update Area access-list. */
for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
if (EXPORT_NAME(area)) {
EXPORT_LIST(area) = NULL;
abr_inv++;
}
if (IMPORT_NAME(area)) {
IMPORT_LIST(area) = NULL;
abr_inv++;
}
}
/* Schedule ABR tasks -- this will be changed -- takada. */
if (IS_OSPF_ABR(ospf) && abr_inv)
ospf_schedule_abr_task(ospf);
}
}
/* If prefix-list is updated, do some updates. */
static void ospf_prefix_list_update(struct prefix_list *plist)
{
struct ospf *ospf = NULL;
int type;
int abr_inv = 0;
struct ospf_area *area;
struct ospf_interface *oi;
struct listnode *node, *n1;
/* If OSPF instatnce does not exist, return right now. */
if (listcount(om->ospf) == 0)
return;
/* Iterate all ospf [VRF] instances */
for (ALL_LIST_ELEMENTS_RO(om->ospf, n1, ospf)) {
/* Update all route-maps which are used
* as redistribution filters.
* They might use prefix-list.
*/
for (type = 0; type <= ZEBRA_ROUTE_MAX; type++) {
struct list *red_list;
struct ospf_redist *red;
red_list = ospf->redist[type];
if (!red_list)
continue;
for (ALL_LIST_ELEMENTS_RO(red_list, node, red)) {
if (ROUTEMAP(red)) {
/* if route-map is not NULL
* it may be using
* this prefix list */
ospf_distribute_list_update(
ospf, type, red->instance);
}
}
}
/* Update area filter-lists. */
for (ALL_LIST_ELEMENTS_RO(ospf->areas, node, area)) {
/* Update filter-list in. */
if (PREFIX_NAME_IN(area)
&& strcmp(PREFIX_NAME_IN(area),
prefix_list_name(plist))
== 0) {
PREFIX_LIST_IN(area) = prefix_list_lookup(
AFI_IP, PREFIX_NAME_IN(area));
abr_inv++;
}
/* Update filter-list out. */
if (PREFIX_NAME_OUT(area)
&& strcmp(PREFIX_NAME_OUT(area),
prefix_list_name(plist))
== 0) {
PREFIX_LIST_OUT(area) = prefix_list_lookup(
AFI_IP, PREFIX_NAME_OUT(area));
abr_inv++;
}
}
/* Update interface neighbor-filter lists. */
for (ALL_LIST_ELEMENTS_RO(ospf->oiflist, node, oi)) {
if (OSPF_IF_PARAM(oi, nbr_filter_name) &&
strcmp(OSPF_IF_PARAM(oi, nbr_filter_name),
prefix_list_name(plist)) == 0) {
oi->nbr_filter = prefix_list_lookup(
AFI_IP,
OSPF_IF_PARAM(oi, nbr_filter_name));
if (oi->nbr_filter)
ospf_intf_neighbor_filter_apply(oi);
}
}
/* Schedule ABR task. */
if (IS_OSPF_ABR(ospf) && abr_inv)
ospf_schedule_abr_task(ospf);
}
}
static struct ospf_distance *ospf_distance_new(void)
{
return XCALLOC(MTYPE_OSPF_DISTANCE, sizeof(struct ospf_distance));
}
static void ospf_distance_free(struct ospf_distance *odistance)
{
XFREE(MTYPE_OSPF_DISTANCE, odistance);
}
int ospf_distance_set(struct vty *vty, struct ospf *ospf,
const char *distance_str, const char *ip_str,
const char *access_list_str)
{
int ret;
struct prefix_ipv4 p;
uint8_t distance;
struct route_node *rn;
struct ospf_distance *odistance;
ret = str2prefix_ipv4(ip_str, &p);
if (ret == 0) {
vty_out(vty, "Malformed prefix\n");
return CMD_WARNING_CONFIG_FAILED;
}
distance = atoi(distance_str);
/* Get OSPF distance node. */
rn = route_node_get(ospf->distance_table, (struct prefix *)&p);
if (rn->info) {
odistance = rn->info;
route_unlock_node(rn);
} else {
odistance = ospf_distance_new();
rn->info = odistance;
}
/* Set distance value. */
odistance->distance = distance;
/* Reset access-list configuration. */
if (odistance->access_list) {
free(odistance->access_list);
odistance->access_list = NULL;
}
if (access_list_str)
odistance->access_list = strdup(access_list_str);
return CMD_SUCCESS;
}
int ospf_distance_unset(struct vty *vty, struct ospf *ospf,
const char *distance_str, const char *ip_str,
char const *access_list_str)
{
int ret;
struct prefix_ipv4 p;
struct route_node *rn;
struct ospf_distance *odistance;
ret = str2prefix_ipv4(ip_str, &p);
if (ret == 0) {
vty_out(vty, "Malformed prefix\n");
return CMD_WARNING_CONFIG_FAILED;
}
rn = route_node_lookup(ospf->distance_table, (struct prefix *)&p);
if (!rn) {
vty_out(vty, "Can't find specified prefix\n");
return CMD_WARNING_CONFIG_FAILED;
}
odistance = rn->info;
if (odistance->access_list)
free(odistance->access_list);
ospf_distance_free(odistance);
rn->info = NULL;
route_unlock_node(rn);
route_unlock_node(rn);
return CMD_SUCCESS;
}
void ospf_distance_reset(struct ospf *ospf)
{
struct route_node *rn;
struct ospf_distance *odistance;
for (rn = route_top(ospf->distance_table); rn; rn = route_next(rn)) {
odistance = rn->info;
if (!odistance)
continue;
if (odistance->access_list)
free(odistance->access_list);
ospf_distance_free(odistance);
rn->info = NULL;
route_unlock_node(rn);
}
}
uint8_t ospf_distance_apply(struct ospf *ospf, struct prefix_ipv4 *p,
struct ospf_route * or)
{
if (ospf == NULL)
return 0;
if (ospf->distance_intra && or->path_type == OSPF_PATH_INTRA_AREA)
return ospf->distance_intra;
if (ospf->distance_inter && or->path_type == OSPF_PATH_INTER_AREA)
return ospf->distance_inter;
if (ospf->distance_external
&& (or->path_type == OSPF_PATH_TYPE1_EXTERNAL ||
or->path_type == OSPF_PATH_TYPE2_EXTERNAL))
return ospf->distance_external;
if (ospf->distance_all)
return ospf->distance_all;
return 0;
}
void ospf_zebra_vrf_register(struct ospf *ospf)
{
if (!zclient || zclient->sock < 0 || !ospf)
return;
if (ospf->vrf_id != VRF_UNKNOWN) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("%s: Register VRF %s id %u", __func__,
ospf_vrf_id_to_name(ospf->vrf_id),
ospf->vrf_id);
zclient_send_reg_requests(zclient, ospf->vrf_id);
}
}
void ospf_zebra_vrf_deregister(struct ospf *ospf)
{
if (!zclient || zclient->sock < 0 || !ospf)
return;
if (ospf->vrf_id != VRF_DEFAULT && ospf->vrf_id != VRF_UNKNOWN) {
if (IS_DEBUG_OSPF_EVENT)
zlog_debug("%s: De-Register VRF %s id %u to Zebra.",
__func__, ospf_vrf_id_to_name(ospf->vrf_id),
ospf->vrf_id);
/* Deregister for router-id, interfaces,
* redistributed routes. */
zclient_send_dereg_requests(zclient, ospf->vrf_id);
}
}
/* Label Manager Functions */
/**
* Check if Label Manager is Ready or not.
*
* @return True if Label Manager is ready, False otherwise
*/
bool ospf_zebra_label_manager_ready(void)
{
return (zclient_sync->sock > 0);
}
/**
* Request Label Range to the Label Manager.
*
* @param base base label of the label range to request
* @param chunk_size size of the label range to request
*
* @return 0 on success, -1 on failure
*/
int ospf_zebra_request_label_range(uint32_t base, uint32_t chunk_size)
{
int ret;
uint32_t start, end;
if (zclient_sync->sock < 0)
return -1;
ret = lm_get_label_chunk(zclient_sync, 0, base, chunk_size, &start,
&end);
if (ret < 0) {
zlog_warn("%s: error getting label range!", __func__);
return -1;
}
return 0;
}
/**
* Release Label Range to the Label Manager.
*
* @param start start of label range to release
* @param end end of label range to release
*
* @return 0 on success, -1 otherwise
*/
int ospf_zebra_release_label_range(uint32_t start, uint32_t end)
{
int ret;
if (zclient_sync->sock < 0)
return -1;
ret = lm_release_label_chunk(zclient_sync, start, end);
if (ret < 0) {
zlog_warn("%s: error releasing label range!", __func__);
return -1;
}
return 0;
}
/**
* Connect to the Label Manager.
*
* @return 0 on success, -1 otherwise
*/
int ospf_zebra_label_manager_connect(void)
{
/* Connect to label manager. */
if (zclient_socket_connect(zclient_sync) < 0) {
zlog_warn("%s: failed connecting synchronous zclient!",
__func__);
return -1;
}
/* make socket non-blocking */
set_nonblocking(zclient_sync->sock);
/* Send hello to notify zebra this is a synchronous client */
if (zclient_send_hello(zclient_sync) == ZCLIENT_SEND_FAILURE) {
zlog_warn("%s: failed sending hello for synchronous zclient!",
__func__);
close(zclient_sync->sock);
zclient_sync->sock = -1;
return -1;
}
/* Connect to label manager */
if (lm_label_manager_connect(zclient_sync, 0) != 0) {
zlog_warn("%s: failed connecting to label manager!", __func__);
if (zclient_sync->sock > 0) {
close(zclient_sync->sock);
zclient_sync->sock = -1;
}
return -1;
}
osr_debug("SR (%s): Successfully connected to the Label Manager",
__func__);
return 0;
}
static void ospf_zebra_connected(struct zclient *zclient)
{
struct ospf *ospf;
struct listnode *node;
/* Send the client registration */
bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER, VRF_DEFAULT);
zclient_send_reg_requests(zclient, VRF_DEFAULT);
/* Activate graceful restart if configured. */
for (ALL_LIST_ELEMENTS_RO(om->ospf, node, ospf)) {
if (!ospf->gr_info.restart_support)
continue;
(void)ospf_zebra_gr_enable(ospf, ospf->gr_info.grace_period);
}
}
/*
* opaque messages between processes
*/
static int ospf_opaque_msg_handler(ZAPI_CALLBACK_ARGS)
{
struct stream *s;
struct zapi_opaque_msg info;
struct ldp_igp_sync_if_state state;
struct ldp_igp_sync_announce announce;
struct zapi_opaque_reg_info dst;
int ret = 0;
s = zclient->ibuf;
if (zclient_opaque_decode(s, &info) != 0)
return -1;
switch (info.type) {
case LINK_STATE_SYNC:
dst.proto = info.src_proto;
dst.instance = info.src_instance;
dst.session_id = info.src_session_id;
dst.type = LINK_STATE_SYNC;
ret = ospf_te_sync_ted(dst);
break;
case LDP_IGP_SYNC_IF_STATE_UPDATE:
STREAM_GET(&state, s, sizeof(state));
ret = ospf_ldp_sync_state_update(state);
break;
case LDP_IGP_SYNC_ANNOUNCE_UPDATE:
STREAM_GET(&announce, s, sizeof(announce));
ret = ospf_ldp_sync_announce_update(announce);
break;
default:
break;
}
stream_failure:
return ret;
}
static int ospf_zebra_client_close_notify(ZAPI_CALLBACK_ARGS)
{
int ret = 0;
struct zapi_client_close_info info;
if (zapi_client_close_notify_decode(zclient->ibuf, &info) < 0)
return -1;
ospf_ldp_sync_handle_client_close(&info);
return ret;
}
static zclient_handler *const ospf_handlers[] = {
[ZEBRA_ROUTER_ID_UPDATE] = ospf_router_id_update_zebra,
[ZEBRA_INTERFACE_ADDRESS_ADD] = ospf_interface_address_add,
[ZEBRA_INTERFACE_ADDRESS_DELETE] = ospf_interface_address_delete,
[ZEBRA_INTERFACE_LINK_PARAMS] = ospf_interface_link_params,
[ZEBRA_REDISTRIBUTE_ROUTE_ADD] = ospf_zebra_read_route,
[ZEBRA_REDISTRIBUTE_ROUTE_DEL] = ospf_zebra_read_route,
[ZEBRA_OPAQUE_MESSAGE] = ospf_opaque_msg_handler,
[ZEBRA_CLIENT_CLOSE_NOTIFY] = ospf_zebra_client_close_notify,
};
void ospf_zebra_init(struct event_loop *master, unsigned short instance)
{
/* Allocate zebra structure. */
zclient = zclient_new(master, &zclient_options_default, ospf_handlers,
array_size(ospf_handlers));
zclient_init(zclient, ZEBRA_ROUTE_OSPF, instance, &ospfd_privs);
zclient->zebra_connected = ospf_zebra_connected;
zclient->nexthop_update = ospf_zebra_import_check_update;
/* Initialize special zclient for synchronous message exchanges. */
zclient_sync = zclient_new(master, &zclient_options_sync, NULL, 0);
zclient_sync->sock = -1;
zclient_sync->redist_default = ZEBRA_ROUTE_OSPF;
zclient_sync->instance = instance;
/*
* session_id must be different from default value (0) to distinguish
* the asynchronous socket from the synchronous one
*/
zclient_sync->session_id = 1;
zclient_sync->privs = &ospfd_privs;
access_list_add_hook(ospf_filter_update);
access_list_delete_hook(ospf_filter_update);
prefix_list_add_hook(ospf_prefix_list_update);
prefix_list_delete_hook(ospf_prefix_list_update);
}
void ospf_zebra_send_arp(const struct interface *ifp, const struct prefix *p)
{
zclient_send_neigh_discovery_req(zclient, ifp, p);
}
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