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bgpd.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/* BGP-4, BGP-4+ daemon program
* Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
*/
#include <zebra.h>
#include "prefix.h"
#include "frrevent.h"
#include "buffer.h"
#include "stream.h"
#include "ringbuf.h"
#include "command.h"
#include "sockunion.h"
#include "sockopt.h"
#include "network.h"
#include "memory.h"
#include "filter.h"
#include "routemap.h"
#include "log.h"
#include "plist.h"
#include "linklist.h"
#include "workqueue.h"
#include "queue.h"
#include "zclient.h"
#include "bfd.h"
#include "hash.h"
#include "jhash.h"
#include "table.h"
#include "lib/json.h"
#include "lib/sockopt.h"
#include "frr_pthread.h"
#include "bitfield.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_dump.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_errors.h"
#include "bgpd/bgp_community.h"
#include "bgpd/bgp_community_alias.h"
#include "bgpd/bgp_conditional_adv.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_regex.h"
#include "bgpd/bgp_clist.h"
#include "bgpd/bgp_fsm.h"
#include "bgpd/bgp_packet.h"
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_open.h"
#include "bgpd/bgp_filter.h"
#include "bgpd/bgp_nexthop.h"
#include "bgpd/bgp_damp.h"
#include "bgpd/bgp_mplsvpn.h"
#ifdef ENABLE_BGP_VNC
#include "bgpd/rfapi/bgp_rfapi_cfg.h"
#include "bgpd/rfapi/rfapi_backend.h"
#endif
#include "bgpd/bgp_evpn.h"
#include "bgpd/bgp_advertise.h"
#include "bgpd/bgp_network.h"
#include "bgpd/bgp_vty.h"
#include "bgpd/bgp_mpath.h"
#include "bgpd/bgp_nht.h"
#include "bgpd/bgp_nhg.h"
#include "bgpd/bgp_updgrp.h"
#include "bgpd/bgp_bfd.h"
#include "bgpd/bgp_memory.h"
#include "bgpd/bgp_evpn_vty.h"
#include "bgpd/bgp_keepalives.h"
#include "bgpd/bgp_io.h"
#include "bgpd/bgp_ecommunity.h"
#include "bgpd/bgp_flowspec.h"
#include "bgpd/bgp_labelpool.h"
#include "bgpd/bgp_pbr.h"
#include "bgpd/bgp_addpath.h"
#include "bgpd/bgp_evpn_private.h"
#include "bgpd/bgp_evpn_mh.h"
#include "bgpd/bgp_mac.h"
#include "bgp_trace.h"
DEFINE_MTYPE_STATIC(BGPD, PEER_TX_SHUTDOWN_MSG, "Peer shutdown message (TX)");
DEFINE_QOBJ_TYPE(bgp_master);
DEFINE_QOBJ_TYPE(bgp);
DEFINE_QOBJ_TYPE(peer);
DEFINE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
/* BGP process wide configuration. */
static struct bgp_master bgp_master;
/* BGP process wide configuration pointer to export. */
struct bgp_master *bm;
/* BGP community-list. */
struct community_list_handler *bgp_clist;
unsigned int multipath_num = MULTIPATH_NUM;
/* Number of bgp instances configured for suppress fib config */
unsigned int bgp_suppress_fib_count;
static void bgp_if_finish(struct bgp *bgp);
static void peer_drop_dynamic_neighbor(struct peer *peer);
extern struct zclient *zclient;
/* handle main socket creation or deletion */
static int bgp_check_main_socket(bool create, struct bgp *bgp)
{
static int bgp_server_main_created;
struct listnode *node;
char *address;
if (create) {
if (bgp_server_main_created)
return 0;
if (list_isempty(bm->addresses)) {
if (bgp_socket(bgp, bm->port, NULL) < 0)
return BGP_ERR_INVALID_VALUE;
} else {
for (ALL_LIST_ELEMENTS_RO(bm->addresses, node, address))
if (bgp_socket(bgp, bm->port, address) < 0)
return BGP_ERR_INVALID_VALUE;
}
bgp_server_main_created = 1;
return 0;
}
if (!bgp_server_main_created)
return 0;
bgp_close();
bgp_server_main_created = 0;
return 0;
}
void bgp_session_reset(struct peer *peer)
{
if (peer->doppelganger &&
(peer->doppelganger->connection->status != Deleted) &&
!(CHECK_FLAG(peer->doppelganger->flags, PEER_FLAG_CONFIG_NODE)))
peer_delete(peer->doppelganger);
BGP_EVENT_ADD(peer->connection, BGP_Stop);
}
/*
* During session reset, we may delete the doppelganger peer, which would
* be the next node to the current node. If the session reset was invoked
* during walk of peer list, we would end up accessing the freed next
* node. This function moves the next node along.
*/
static void bgp_session_reset_safe(struct peer *peer, struct listnode **nnode)
{
struct listnode *n;
struct peer *npeer;
n = (nnode) ? *nnode : NULL;
npeer = (n) ? listgetdata(n) : NULL;
if (peer->doppelganger &&
(peer->doppelganger->connection->status != Deleted) &&
!(CHECK_FLAG(peer->doppelganger->flags, PEER_FLAG_CONFIG_NODE))) {
if (peer->doppelganger == npeer)
/* nnode and *nnode are confirmed to be non-NULL here */
*nnode = (*nnode)->next;
peer_delete(peer->doppelganger);
}
BGP_EVENT_ADD(peer->connection, BGP_Stop);
}
/* BGP global flag manipulation. */
int bgp_option_set(int flag)
{
switch (flag) {
case BGP_OPT_NO_FIB:
case BGP_OPT_NO_LISTEN:
case BGP_OPT_NO_ZEBRA:
SET_FLAG(bm->options, flag);
break;
default:
return BGP_ERR_INVALID_FLAG;
}
return 0;
}
int bgp_option_unset(int flag)
{
switch (flag) {
case BGP_OPT_NO_ZEBRA:
case BGP_OPT_NO_FIB:
UNSET_FLAG(bm->options, flag);
break;
default:
return BGP_ERR_INVALID_FLAG;
}
return 0;
}
int bgp_option_check(int flag)
{
return CHECK_FLAG(bm->options, flag);
}
/* set the bgp no-rib option during runtime and remove installed routes */
void bgp_option_norib_set_runtime(void)
{
struct bgp *bgp;
struct listnode *node;
afi_t afi;
safi_t safi;
if (bgp_option_check(BGP_OPT_NO_FIB))
return;
bgp_option_set(BGP_OPT_NO_FIB);
zlog_info("Disabled BGP route installation to RIB (Zebra)");
for (ALL_LIST_ELEMENTS_RO(bm->bgp, node, bgp)) {
FOREACH_AFI_SAFI (afi, safi) {
/*
* Stop a crash, more work is needed
* here to properly add/remove these types of
* routes from zebra.
*/
if (!bgp_fibupd_safi(safi))
continue;
bgp_zebra_withdraw_table_all_subtypes(bgp, afi, safi);
}
}
zlog_info("All routes have been withdrawn from RIB (Zebra)");
}
/* unset the bgp no-rib option during runtime and announce routes to Zebra */
void bgp_option_norib_unset_runtime(void)
{
struct bgp *bgp;
struct listnode *node;
afi_t afi;
safi_t safi;
if (!bgp_option_check(BGP_OPT_NO_FIB))
return;
bgp_option_unset(BGP_OPT_NO_FIB);
zlog_info("Enabled BGP route installation to RIB (Zebra)");
for (ALL_LIST_ELEMENTS_RO(bm->bgp, node, bgp)) {
FOREACH_AFI_SAFI (afi, safi) {
/*
* Stop a crash, more work is needed
* here to properly add/remove these types
* of routes from zebra
*/
if (!bgp_fibupd_safi(safi))
continue;
bgp_zebra_announce_table_all_subtypes(bgp, afi, safi);
}
}
zlog_info("All routes have been installed in RIB (Zebra)");
}
/* Internal function to set BGP structure configureation flag. */
static void bgp_config_set(struct bgp *bgp, int config)
{
SET_FLAG(bgp->config, config);
}
static void bgp_config_unset(struct bgp *bgp, int config)
{
UNSET_FLAG(bgp->config, config);
}
static int bgp_config_check(struct bgp *bgp, int config)
{
return CHECK_FLAG(bgp->config, config);
}
/* Set BGP router identifier; distinguish between explicit config and other
* cases.
*/
static int bgp_router_id_set(struct bgp *bgp, const struct in_addr *id,
bool is_config)
{
struct peer *peer;
struct listnode *node, *nnode;
if (IPV4_ADDR_SAME(&bgp->router_id, id))
return 0;
/* EVPN uses router id in RD, withdraw them */
if (is_evpn_enabled())
bgp_evpn_handle_router_id_update(bgp, true);
vpn_handle_router_id_update(bgp, true, is_config);
IPV4_ADDR_COPY(&bgp->router_id, id);
/* Set all peer's local identifier with this value. */
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
IPV4_ADDR_COPY(&peer->local_id, id);
if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->connection->status)) {
peer->last_reset = PEER_DOWN_RID_CHANGE;
bgp_notify_send(peer->connection, BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
}
}
/* EVPN uses router id in RD, update them */
if (is_evpn_enabled())
bgp_evpn_handle_router_id_update(bgp, false);
vpn_handle_router_id_update(bgp, false, is_config);
return 0;
}
void bgp_router_id_zebra_bump(vrf_id_t vrf_id, const struct prefix *router_id)
{
struct listnode *node, *nnode;
struct bgp *bgp;
struct in_addr *addr = NULL;
if (router_id != NULL)
addr = (struct in_addr *)&(router_id->u.prefix4);
if (vrf_id == VRF_DEFAULT) {
/* Router-id change for default VRF has to also update all
* views. */
for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
continue;
if (addr)
bgp->router_id_zebra = *addr;
else
addr = &bgp->router_id_zebra;
if (!bgp->router_id_static.s_addr) {
/* Router ID is updated if there are no active
* peer sessions
*/
if (bgp->established_peers == 0) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug(
"RID change : vrf %s(%u), RTR ID %pI4",
bgp->name_pretty,
bgp->vrf_id, addr);
/*
* if old router-id was 0x0, set flag
* to use this new value
*/
bgp_router_id_set(bgp, addr,
(bgp->router_id.s_addr
== INADDR_ANY)
? true
: false);
}
}
}
} else {
bgp = bgp_lookup_by_vrf_id(vrf_id);
if (bgp) {
if (addr)
bgp->router_id_zebra = *addr;
else
addr = &bgp->router_id_zebra;
if (!bgp->router_id_static.s_addr) {
/* Router ID is updated if there are no active
* peer sessions
*/
if (bgp->established_peers == 0) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug(
"RID change : vrf %s(%u), RTR ID %pI4",
bgp->name_pretty,
bgp->vrf_id, addr);
/*
* if old router-id was 0x0, set flag
* to use this new value
*/
bgp_router_id_set(bgp, addr,
(bgp->router_id.s_addr
== INADDR_ANY)
? true
: false);
}
}
}
}
}
void bgp_router_id_static_set(struct bgp *bgp, struct in_addr id)
{
bgp->router_id_static = id;
bgp_router_id_set(bgp,
id.s_addr != INADDR_ANY ? &id : &bgp->router_id_zebra,
true /* is config */);
}
void bm_wait_for_fib_set(bool set)
{
bool send_msg = false;
struct bgp *bgp;
struct peer *peer;
struct listnode *next, *node;
if (bm->wait_for_fib == set)
return;
bm->wait_for_fib = set;
if (set) {
if (bgp_suppress_fib_count == 0)
send_msg = true;
bgp_suppress_fib_count++;
} else {
bgp_suppress_fib_count--;
if (bgp_suppress_fib_count == 0)
send_msg = true;
}
if (send_msg && zclient)
zebra_route_notify_send(ZEBRA_ROUTE_NOTIFY_REQUEST,
zclient, set);
/*
* If this is configed at a time when peers are already set
* FRR needs to reset the connection(s) as that some installs
* may have already happened in some shape fashion or form
* let's just start over
*/
for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
if (!BGP_IS_VALID_STATE_FOR_NOTIF(
peer->connection->status))
continue;
peer->last_reset = PEER_DOWN_SUPPRESS_FIB_PENDING;
bgp_notify_send(peer->connection, BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
}
}
}
/* Set the suppress fib pending for the bgp configuration */
void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set)
{
bool send_msg = false;
struct peer *peer;
struct listnode *node;
if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW)
return;
if (set) {
SET_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING);
/* Send msg to zebra for the first instance of bgp enabled
* with suppress fib
*/
if (bgp_suppress_fib_count == 0)
send_msg = true;
bgp_suppress_fib_count++;
} else {
UNSET_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING);
bgp_suppress_fib_count--;
/* Send msg to zebra if there are no instances enabled
* with suppress fib
*/
if (bgp_suppress_fib_count == 0)
send_msg = true;
}
/* Send route notify request to RIB */
if (send_msg) {
if (BGP_DEBUG(zebra, ZEBRA))
zlog_debug("Sending ZEBRA_ROUTE_NOTIFY_REQUEST");
if (zclient)
zebra_route_notify_send(ZEBRA_ROUTE_NOTIFY_REQUEST,
zclient, set);
}
/*
* If this is configed at a time when peers are already set
* FRR needs to reset the connection as that some installs
* may have already happened in some shape fashion or form
* let's just start over
*/
for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
if (!BGP_IS_VALID_STATE_FOR_NOTIF(peer->connection->status))
continue;
peer->last_reset = PEER_DOWN_SUPPRESS_FIB_PENDING;
bgp_notify_send(peer->connection, BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
}
}
/* BGP's cluster-id control. */
void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id)
{
struct peer *peer;
struct listnode *node, *nnode;
if (bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID)
&& IPV4_ADDR_SAME(&bgp->cluster_id, cluster_id))
return;
IPV4_ADDR_COPY(&bgp->cluster_id, cluster_id);
bgp_config_set(bgp, BGP_CONFIG_CLUSTER_ID);
/* Clear all IBGP peer. */
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (peer->sort != BGP_PEER_IBGP)
continue;
if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->connection->status)) {
peer->last_reset = PEER_DOWN_CLID_CHANGE;
bgp_notify_send(peer->connection, BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
}
}
}
void bgp_cluster_id_unset(struct bgp *bgp)
{
struct peer *peer;
struct listnode *node, *nnode;
if (!bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID))
return;
bgp->cluster_id.s_addr = 0;
bgp_config_unset(bgp, BGP_CONFIG_CLUSTER_ID);
/* Clear all IBGP peer. */
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (peer->sort != BGP_PEER_IBGP)
continue;
if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->connection->status)) {
peer->last_reset = PEER_DOWN_CLID_CHANGE;
bgp_notify_send(peer->connection, BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
}
}
}
/* BGP timer configuration. */
void bgp_timers_set(struct vty *vty, struct bgp *bgp, uint32_t keepalive,
uint32_t holdtime, uint32_t connect_retry,
uint32_t delayopen)
{
uint32_t default_keepalive = holdtime / 3;
if (keepalive > default_keepalive) {
if (vty)
vty_out(vty,
"%% keepalive value %u is larger than 1/3 of the holdtime, setting to %u\n",
keepalive, default_keepalive);
} else {
default_keepalive = keepalive;
}
bgp->default_keepalive = default_keepalive;
bgp->default_holdtime = holdtime;
bgp->default_connect_retry = connect_retry;
bgp->default_delayopen = delayopen;
}
/* mostly for completeness - CLI uses its own defaults */
void bgp_timers_unset(struct bgp *bgp)
{
bgp->default_keepalive = BGP_DEFAULT_KEEPALIVE;
bgp->default_holdtime = BGP_DEFAULT_HOLDTIME;
bgp->default_connect_retry = BGP_DEFAULT_CONNECT_RETRY;
bgp->default_delayopen = BGP_DEFAULT_DELAYOPEN;
}
void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t keepalive_idle,
uint16_t keepalive_intvl, uint16_t keepalive_probes)
{
bgp->tcp_keepalive_idle = keepalive_idle;
bgp->tcp_keepalive_intvl = keepalive_intvl;
bgp->tcp_keepalive_probes = keepalive_probes;
}
void bgp_tcp_keepalive_unset(struct bgp *bgp)
{
bgp->tcp_keepalive_idle = 0;
bgp->tcp_keepalive_intvl = 0;
bgp->tcp_keepalive_probes = 0;
}
/* BGP confederation configuration. */
void bgp_confederation_id_set(struct bgp *bgp, as_t as, const char *as_str)
{
struct peer *peer;
struct listnode *node, *nnode;
int already_confed;
if (as == 0)
return;
/* Remember - were we doing confederation before? */
already_confed = bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION);
bgp->confed_id = as;
if (bgp->confed_id_pretty)
XFREE(MTYPE_BGP_NAME, bgp->confed_id_pretty);
bgp->confed_id_pretty = XSTRDUP(MTYPE_BGP_NAME, as_str);
bgp_config_set(bgp, BGP_CONFIG_CONFEDERATION);
/* If we were doing confederation already, this is just an external
AS change. Just Reset EBGP sessions, not CONFED sessions. If we
were not doing confederation before, reset all EBGP sessions. */
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
enum bgp_peer_sort ptype = peer_sort(peer);
/* We're looking for peers who's AS is not local or part of our
confederation. */
if (already_confed) {
if (ptype == BGP_PEER_EBGP) {
peer->local_as = as;
if (BGP_IS_VALID_STATE_FOR_NOTIF(
peer->connection->status)) {
peer->last_reset =
PEER_DOWN_CONFED_ID_CHANGE;
bgp_notify_send(peer->connection,
BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
} else
bgp_session_reset_safe(peer, &nnode);
}
} else {
/* Not doign confederation before, so reset every
non-local
session */
if (ptype != BGP_PEER_IBGP) {
/* Reset the local_as to be our EBGP one */
if (ptype == BGP_PEER_EBGP)
peer->local_as = as;
if (BGP_IS_VALID_STATE_FOR_NOTIF(
peer->connection->status)) {
peer->last_reset =
PEER_DOWN_CONFED_ID_CHANGE;
bgp_notify_send(peer->connection,
BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
} else
bgp_session_reset_safe(peer, &nnode);
}
}
}
return;
}
void bgp_confederation_id_unset(struct bgp *bgp)
{
struct peer *peer;
struct listnode *node, *nnode;
bgp->confed_id = 0;
XFREE(MTYPE_BGP_NAME, bgp->confed_id_pretty);
bgp_config_unset(bgp, BGP_CONFIG_CONFEDERATION);
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
/* We're looking for peers who's AS is not local */
if (peer_sort(peer) != BGP_PEER_IBGP) {
peer->local_as = bgp->as;
if (BGP_IS_VALID_STATE_FOR_NOTIF(
peer->connection->status)) {
peer->last_reset = PEER_DOWN_CONFED_ID_CHANGE;
bgp_notify_send(peer->connection,
BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
}
else
bgp_session_reset_safe(peer, &nnode);
}
}
}
/* Is an AS part of the confed or not? */
bool bgp_confederation_peers_check(struct bgp *bgp, as_t as)
{
int i;
if (!bgp)
return false;
for (i = 0; i < bgp->confed_peers_cnt; i++)
if (bgp->confed_peers[i].as == as)
return true;
return false;
}
/* Add an AS to the confederation set. */
void bgp_confederation_peers_add(struct bgp *bgp, as_t as, const char *as_str)
{
struct peer *peer;
struct listnode *node, *nnode;
if (!bgp)
return;
if (bgp_confederation_peers_check(bgp, as))
return;
bgp->confed_peers = XREALLOC(MTYPE_BGP_CONFED_LIST, bgp->confed_peers,
(bgp->confed_peers_cnt + 1) *
sizeof(struct as_confed));
bgp->confed_peers[bgp->confed_peers_cnt].as = as;
bgp->confed_peers[bgp->confed_peers_cnt].as_pretty =
XSTRDUP(MTYPE_BGP_NAME, as_str);
bgp->confed_peers_cnt++;
if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)) {
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (peer->as == as) {
peer->local_as = bgp->as;
(void)peer_sort(peer);
if (BGP_IS_VALID_STATE_FOR_NOTIF(
peer->connection->status)) {
peer->last_reset =
PEER_DOWN_CONFED_PEER_CHANGE;
bgp_notify_send(peer->connection,
BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
} else
bgp_session_reset_safe(peer, &nnode);
}
}
}
}
/* Delete an AS from the confederation set. */
void bgp_confederation_peers_remove(struct bgp *bgp, as_t as)
{
int i;
int j;
struct peer *peer;
struct listnode *node, *nnode;
if (!bgp)
return;
if (!bgp_confederation_peers_check(bgp, as))
return;
for (i = 0; i < bgp->confed_peers_cnt; i++)
if (bgp->confed_peers[i].as == as) {
XFREE(MTYPE_BGP_NAME, bgp->confed_peers[i].as_pretty);
for (j = i + 1; j < bgp->confed_peers_cnt; j++) {
bgp->confed_peers[j - 1].as =
bgp->confed_peers[j].as;
bgp->confed_peers[j - 1].as_pretty =
bgp->confed_peers[j].as_pretty;
}
}
bgp->confed_peers_cnt--;
if (bgp->confed_peers_cnt == 0) {
if (bgp->confed_peers)
XFREE(MTYPE_BGP_CONFED_LIST, bgp->confed_peers);
bgp->confed_peers = NULL;
} else
bgp->confed_peers = XREALLOC(
MTYPE_BGP_CONFED_LIST, bgp->confed_peers,
bgp->confed_peers_cnt * sizeof(struct as_confed));
/* Now reset any peer who's remote AS has just been removed from the
CONFED */
if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)) {
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (peer->as == as) {
peer->local_as = bgp->confed_id;
(void)peer_sort(peer);
if (BGP_IS_VALID_STATE_FOR_NOTIF(
peer->connection->status)) {
peer->last_reset =
PEER_DOWN_CONFED_PEER_CHANGE;
bgp_notify_send(peer->connection,
BGP_NOTIFY_CEASE,
BGP_NOTIFY_CEASE_CONFIG_CHANGE);
} else
bgp_session_reset_safe(peer, &nnode);
}
}
}
}
/* Local preference configuration. */
void bgp_default_local_preference_set(struct bgp *bgp, uint32_t local_pref)
{
if (!bgp)
return;
bgp->default_local_pref = local_pref;
}
void bgp_default_local_preference_unset(struct bgp *bgp)
{
if (!bgp)
return;
bgp->default_local_pref = BGP_DEFAULT_LOCAL_PREF;
}
/* Local preference configuration. */
void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
uint32_t queue_size)
{
if (!bgp)
return;
bgp->default_subgroup_pkt_queue_max = queue_size;
}
void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp)
{
if (!bgp)
return;
bgp->default_subgroup_pkt_queue_max =
BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX;
}
/* Listen limit configuration. */
void bgp_listen_limit_set(struct bgp *bgp, int listen_limit)
{
if (!bgp)
return;
bgp->dynamic_neighbors_limit = listen_limit;
}
void bgp_listen_limit_unset(struct bgp *bgp)
{
if (!bgp)
return;
bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
}
int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
afi_t *afi, safi_t *safi)
{
/* Map from IANA values to internal values, return error if
* values are unrecognized.
*/
*afi = afi_iana2int(pkt_afi);
*safi = safi_iana2int(pkt_safi);
if (*afi == AFI_MAX || *safi == SAFI_MAX)
return -1;
return 0;
}
int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi, iana_afi_t *pkt_afi,
iana_safi_t *pkt_safi)
{
/* Map from internal values to IANA values, return error if
* internal values are bad (unexpected).
*/
if (afi == AFI_MAX || safi == SAFI_MAX)
return -1;
*pkt_afi = afi_int2iana(afi);
*pkt_safi = safi_int2iana(safi);
return 0;
}
struct peer_af *peer_af_create(struct peer *peer, afi_t afi, safi_t safi)
{
struct peer_af *af;
int afid;
struct bgp *bgp;
if (!peer)
return NULL;
afid = afindex(afi, safi);
if (afid >= BGP_AF_MAX)
return NULL;
bgp = peer->bgp;
assert(peer->peer_af_array[afid] == NULL);
/* Allocate new peer af */
af = XCALLOC(MTYPE_BGP_PEER_AF, sizeof(struct peer_af));
peer->peer_af_array[afid] = af;
af->afi = afi;
af->safi = safi;
af->afid = afid;
af->peer = peer;
bgp->af_peer_count[afi][safi]++;
return af;
}
struct peer_af *peer_af_find(struct peer *peer, afi_t afi, safi_t safi)
{
int afid;
if (!peer)
return NULL;
afid = afindex(afi, safi);
if (afid >= BGP_AF_MAX)
return NULL;
return peer->peer_af_array[afid];
}
int peer_af_delete(struct peer *peer, afi_t afi, safi_t safi)
{
struct peer_af *af;
int afid;
struct bgp *bgp;
if (!peer)
return -1;
afid = afindex(afi, safi);
if (afid >= BGP_AF_MAX)
return -1;
af = peer->peer_af_array[afid];
if (!af)
return -1;
bgp = peer->bgp;
bgp_soft_reconfig_table_task_cancel(bgp, bgp->rib[afi][safi], peer);
bgp_stop_announce_route_timer(af);
if (PAF_SUBGRP(af)) {
if (BGP_DEBUG(update_groups, UPDATE_GROUPS))
zlog_debug("u%" PRIu64 ":s%" PRIu64 " remove peer %s",
af->subgroup->update_group->id,
af->subgroup->id, peer->host);
}
update_subgroup_remove_peer(af->subgroup, af);
if (bgp->af_peer_count[afi][safi])
bgp->af_peer_count[afi][safi]--;
peer->peer_af_array[afid] = NULL;
XFREE(MTYPE_BGP_PEER_AF, af);
return 0;
}
/* Peer comparison function for sorting. */
int peer_cmp(struct peer *p1, struct peer *p2)
{
if (p1->group && !p2->group)
return -1;
if (!p1->group && p2->group)
return 1;
if (p1->group == p2->group) {
if (p1->conf_if && !p2->conf_if)
return -1;
if (!p1->conf_if && p2->conf_if)
return 1;
if (p1->conf_if && p2->conf_if)
return if_cmp_name_func(p1->conf_if, p2->conf_if);
} else
return strcmp(p1->group->name, p2->group->name);
return sockunion_cmp(&p1->connection->su, &p2->connection->su);
}
static unsigned int peer_hash_key_make(const void *p)
{
const struct peer *peer = p;
return sockunion_hash(&peer->connection->su);
}
static bool peer_hash_same(const void *p1, const void *p2)
{
const struct peer *peer1 = p1;
const struct peer *peer2 = p2;