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frr/bgpd/bgpd.h
Daniel Baumann a2d156806a
Merging upstream version 10.2. 
Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 10:17:20 +01:00

2887 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/* BGP message definition header.
* Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
*/
#ifndef _QUAGGA_BGPD_H
#define _QUAGGA_BGPD_H
#include "qobj.h"
#include <pthread.h>
#include "hook.h"
#include "frr_pthread.h"
#include "lib/json.h"
#include "vrf.h"
#include "vty.h"
#include "srv6.h"
#include "iana_afi.h"
#include "asn.h"
PREDECL_LIST(zebra_announce);
/* For union sockunion. */
#include "queue.h"
#include "sockunion.h"
#include "routemap.h"
#include "linklist.h"
#include "defaults.h"
#include "bgp_memory.h"
#include "bitfield.h"
#include "vxlan.h"
#include "bgp_labelpool.h"
#include "bgp_addpath_types.h"
#include "bgp_nexthop.h"
#include "bgp_io.h"
#include "bgp_damp.h"
#include "lib/bfd.h"
DECLARE_HOOK(bgp_hook_config_write_vrf, (struct vty *vty, struct vrf *vrf),
(vty, vrf));
#define BGP_MAX_HOSTNAME 64 /* Linux max, is larger than most other sys */
#define BGP_PEER_MAX_HASH_SIZE 16384
/* Default interval for IPv6 RAs when triggered by BGP unnumbered neighbor. */
#define BGP_UNNUM_DEFAULT_RA_INTERVAL 10
struct update_subgroup;
struct bpacket;
struct bgp_pbr_config;
/*
* Allow the neighbor XXXX remote-as to take internal or external
* AS_SPECIFIED is zero to auto-inherit original non-feature/enhancement
* behavior
* in the system.
*/
enum peer_asn_type {
AS_UNSPECIFIED = 1,
AS_SPECIFIED = 2,
AS_INTERNAL = 4,
AS_EXTERNAL = 8,
AS_AUTO = 16,
};
/* Zebra Gracaful Restart states */
enum zebra_gr_mode {
ZEBRA_GR_DISABLE = 0,
ZEBRA_GR_ENABLE
};
/* Typedef BGP specific types. */
typedef uint16_t as16_t; /* we may still encounter 16 Bit asnums */
typedef uint16_t bgp_size_t;
enum bgp_af_index {
BGP_AF_START,
BGP_AF_IPV4_UNICAST = BGP_AF_START,
BGP_AF_IPV4_MULTICAST,
BGP_AF_IPV4_VPN,
BGP_AF_IPV6_UNICAST,
BGP_AF_IPV6_MULTICAST,
BGP_AF_IPV6_VPN,
BGP_AF_IPV4_ENCAP,
BGP_AF_IPV6_ENCAP,
BGP_AF_L2VPN_EVPN,
BGP_AF_IPV4_LBL_UNICAST,
BGP_AF_IPV6_LBL_UNICAST,
BGP_AF_IPV4_FLOWSPEC,
BGP_AF_IPV6_FLOWSPEC,
BGP_AF_MAX
};
#define AF_FOREACH(af) for ((af) = BGP_AF_START; (af) < BGP_AF_MAX; (af)++)
#define FOREACH_SAFI(safi) \
for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++)
extern struct frr_pthread *bgp_pth_io;
extern struct frr_pthread *bgp_pth_ka;
/* BGP master for system wide configurations and variables. */
struct bgp_master {
/* BGP instance list. */
struct list *bgp;
/* BGP thread master. */
struct event_loop *master;
/* Listening sockets */
struct list *listen_sockets;
/* BGP port number. */
uint16_t port;
/* Listener addresses */
struct list *addresses;
/* The Mac table */
struct hash *self_mac_hash;
/* BGP start time. */
time_t start_time;
/* Various BGP global configuration. */
uint8_t options;
#define BGP_OPT_NO_FIB (1 << 0)
#define BGP_OPT_NO_LISTEN (1 << 1)
#define BGP_OPT_NO_ZEBRA (1 << 2)
#define BGP_OPT_TRAPS_RFC4273 (1 << 3)
#define BGP_OPT_TRAPS_BGP4MIBV2 (1 << 4)
#define BGP_OPT_TRAPS_RFC4382 (1 << 5)
uint64_t updgrp_idspace;
uint64_t subgrp_idspace;
/* timer to dampen route map changes */
struct event *t_rmap_update; /* Handle route map updates */
uint32_t rmap_update_timer; /* Route map update timer */
#define RMAP_DEFAULT_UPDATE_TIMER 5 /* disabled by default */
/* Id space for automatic RD derivation for an EVI/VRF */
bitfield_t rd_idspace;
/* dynamic mpls label allocation pool */
struct labelpool labelpool;
/* BGP-EVPN VRF ID. Defaults to default VRF (if any) */
struct bgp* bgp_evpn;
/* How big should we set the socket buffer size */
uint32_t socket_buffer;
/* Should we do wait for fib install globally? */
bool wait_for_fib;
/* EVPN multihoming */
struct bgp_evpn_mh_info *mh_info;
/* global update-delay timer values */
uint16_t v_update_delay;
uint16_t v_establish_wait;
uint32_t flags;
#define BM_FLAG_GRACEFUL_SHUTDOWN (1 << 0)
#define BM_FLAG_SEND_EXTRA_DATA_TO_ZEBRA (1 << 1)
#define BM_FLAG_MAINTENANCE_MODE (1 << 2)
#define BM_FLAG_GR_RESTARTER (1 << 3)
#define BM_FLAG_GR_DISABLED (1 << 4)
#define BM_FLAG_GR_PRESERVE_FWD (1 << 5)
#define BM_FLAG_GRACEFUL_RESTART (1 << 6)
#define BM_FLAG_GR_COMPLETE (1 << 7)
#define BM_FLAG_IPV6_NO_AUTO_RA (1 << 8)
#define BM_FLAG_GR_CONFIGURED (BM_FLAG_GR_RESTARTER | BM_FLAG_GR_DISABLED)
/* BGP-wide graceful restart config params */
uint32_t restart_time;
uint32_t stalepath_time;
uint32_t select_defer_time;
uint32_t rib_stale_time;
time_t startup_time;
time_t gr_completion_time;
bool terminating; /* global flag that sigint terminate seen */
/* TOS value for outgoing packets in BGP connections */
uint8_t ip_tos;
#define BM_DEFAULT_Q_LIMIT 10000
uint32_t inq_limit;
uint32_t outq_limit;
struct event *t_bgp_sync_label_manager;
struct event *t_bgp_start_label_manager;
struct event *t_bgp_zebra_route;
bool v6_with_v4_nexthops;
/* To preserve ordering of installations into zebra across all Vrfs */
struct zebra_announce_head zebra_announce_head;
QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(bgp_master);
/* BGP route-map structure. */
struct bgp_rmap {
char *name;
struct route_map *map;
};
struct bgp_redist {
unsigned short instance;
/* BGP redistribute metric configuration. */
uint8_t redist_metric_flag;
uint32_t redist_metric;
/* BGP redistribute route-map. */
struct bgp_rmap rmap;
};
enum vpn_policy_direction {
BGP_VPN_POLICY_DIR_FROMVPN = 0,
BGP_VPN_POLICY_DIR_TOVPN = 1,
BGP_VPN_POLICY_DIR_MAX = 2
};
struct vpn_policy {
struct bgp *bgp; /* parent */
afi_t afi;
struct ecommunity *rtlist[BGP_VPN_POLICY_DIR_MAX];
struct ecommunity *import_redirect_rtlist;
char *rmap_name[BGP_VPN_POLICY_DIR_MAX];
struct route_map *rmap[BGP_VPN_POLICY_DIR_MAX];
/* should be mpls_label_t? */
uint32_t tovpn_label; /* may be MPLS_LABEL_NONE */
uint32_t tovpn_zebra_vrf_label_last_sent;
char *tovpn_rd_pretty;
struct prefix_rd tovpn_rd;
struct prefix tovpn_nexthop; /* unset => set to 0 */
uint32_t flags;
#define BGP_VPN_POLICY_TOVPN_LABEL_AUTO (1 << 0)
#define BGP_VPN_POLICY_TOVPN_RD_SET (1 << 1)
#define BGP_VPN_POLICY_TOVPN_NEXTHOP_SET (1 << 2)
#define BGP_VPN_POLICY_TOVPN_SID_AUTO (1 << 3)
#define BGP_VPN_POLICY_TOVPN_LABEL_PER_NEXTHOP (1 << 4)
/* Manual label is registered with zebra label manager */
#define BGP_VPN_POLICY_TOVPN_LABEL_MANUAL_REG (1 << 5)
/*
* If we are importing another vrf into us keep a list of
* vrf names that are being imported into us.
*/
struct list *import_vrf;
/*
* if we are being exported to another vrf keep a list of
* vrf names that we are being exported to.
*/
struct list *export_vrf;
/*
* Segment-Routing SRv6 Mode
*/
uint32_t tovpn_sid_index; /* unset => set to 0 */
struct in6_addr *tovpn_sid;
struct srv6_locator *tovpn_sid_locator;
uint32_t tovpn_sid_transpose_label;
struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
};
/*
* Type of 'struct bgp'.
* - Default: The default instance
* - VRF: A specific (non-default) VRF
* - View: An instance used for route exchange
* The "default" instance is treated separately to simplify the code. Note
* that if deployed in a Multi-VRF environment, it may not exist.
*/
enum bgp_instance_type {
BGP_INSTANCE_TYPE_DEFAULT,
BGP_INSTANCE_TYPE_VRF,
BGP_INSTANCE_TYPE_VIEW
};
#define BGP_SEND_EOR(bgp, afi, safi) \
(!CHECK_FLAG(bgp->flags, BGP_FLAG_GR_DISABLE_EOR) \
&& ((bgp->gr_info[afi][safi].t_select_deferral == NULL) \
|| (bgp->gr_info[afi][safi].eor_required \
== bgp->gr_info[afi][safi].eor_received)))
/* BGP GR Global ds */
#define BGP_GLOBAL_GR_MODE 4
#define BGP_GLOBAL_GR_EVENT_CMD 4
/* Graceful restart selection deferral timer info */
struct graceful_restart_info {
/* Count of EOR message expected */
uint32_t eor_required;
/* Count of EOR received */
uint32_t eor_received;
/* Deferral Timer */
struct event *t_select_deferral;
/* Routes Deferred */
uint32_t gr_deferred;
/* Best route select */
struct event *t_route_select;
/* AFI, SAFI enabled */
bool af_enabled;
/* Route update completed */
bool route_sync;
};
enum global_mode {
GLOBAL_HELPER = 0, /* This is the default mode */
GLOBAL_GR,
GLOBAL_DISABLE,
GLOBAL_INVALID
};
enum global_gr_command {
GLOBAL_GR_CMD = 0,
NO_GLOBAL_GR_CMD,
GLOBAL_DISABLE_CMD,
NO_GLOBAL_DISABLE_CMD
};
#define BGP_GR_SUCCESS 0
#define BGP_GR_FAILURE 1
/* Handling of BGP link bandwidth (LB) on receiver - whether and how to
* do weighted ECMP. Note: This applies after multipath computation.
*/
enum bgp_link_bw_handling {
/* Do ECMP if some paths don't have LB - default */
BGP_LINK_BW_ECMP,
/* Completely ignore LB, just do regular ECMP */
BGP_LINK_BW_IGNORE_BW,
/* Skip paths without LB, do wECMP on others */
BGP_LINK_BW_SKIP_MISSING,
/* Do wECMP with default weight for paths not having LB */
BGP_LINK_BW_DEFWT_4_MISSING
};
RB_HEAD(bgp_es_vrf_rb_head, bgp_evpn_es_vrf);
RB_PROTOTYPE(bgp_es_vrf_rb_head, bgp_evpn_es_vrf, rb_node, bgp_es_vrf_rb_cmp);
struct bgp_snmp_stats {
/* SNMP variables for mplsL3Vpn*/
time_t creation_time;
time_t modify_time;
bool active;
uint32_t routes_added;
uint32_t routes_deleted;
};
struct bgp_srv6_function {
struct in6_addr sid;
char locator_name[SRV6_LOCNAME_SIZE];
};
struct as_confed {
as_t as;
char *as_pretty;
};
struct bgp_mplsvpn_nh_label_bind_cache;
PREDECL_RBTREE_UNIQ(bgp_mplsvpn_nh_label_bind_cache);
/* BGP instance structure. */
struct bgp {
/* AS number of this BGP instance. */
as_t as;
char *as_pretty;
/* Name of this BGP instance. */
char *name;
char *name_pretty; /* printable "VRF|VIEW name|default" */
/* Type of instance and VRF id. */
enum bgp_instance_type inst_type;
vrf_id_t vrf_id;
/* Reference count to allow peer_delete to finish after bgp_delete */
int lock;
/* Self peer. */
struct peer *peer_self;
/* BGP peer. */
struct list *peer;
struct hash *peerhash;
/* BGP peer group. */
struct list *group;
/* The maximum number of BGP dynamic neighbors that can be created */
int dynamic_neighbors_limit;
/* The current number of BGP dynamic neighbors */
int dynamic_neighbors_count;
struct hash *update_groups[BGP_AF_MAX];
/*
* Global statistics for update groups.
*/
struct {
uint32_t join_events;
uint32_t prune_events;
uint32_t merge_events;
uint32_t split_events;
uint32_t updgrp_switch_events;
uint32_t peer_refreshes_combined;
uint32_t adj_count;
uint32_t merge_checks_triggered;
uint32_t updgrps_created;
uint32_t updgrps_deleted;
uint32_t subgrps_created;
uint32_t subgrps_deleted;
} update_group_stats;
struct bgp_snmp_stats *snmp_stats;
/* BGP configuration. */
uint16_t config;
#define BGP_CONFIG_CLUSTER_ID (1 << 0)
#define BGP_CONFIG_CONFEDERATION (1 << 1)
#define BGP_CONFIG_ASNOTATION (1 << 2)
/* BGP router identifier. */
struct in_addr router_id;
struct in_addr router_id_static;
struct in_addr router_id_zebra;
/* BGP route reflector cluster ID. */
struct in_addr cluster_id;
/* BGP confederation information. */
as_t confed_id;
char *confed_id_pretty;
struct as_confed *confed_peers;
int confed_peers_cnt;
/* start-up timer on only once at the beginning */
struct event *t_startup;
uint32_t v_maxmed_onstartup; /* Duration of max-med on start-up */
#define BGP_MAXMED_ONSTARTUP_UNCONFIGURED 0 /* 0 means off, its the default */
uint32_t maxmed_onstartup_value; /* Max-med value when active on
start-up */
/* non-null when max-med onstartup is on */
struct event *t_maxmed_onstartup;
uint8_t maxmed_onstartup_over; /* Flag to make it effective only once */
bool v_maxmed_admin; /* true/false if max-med administrative is on/off
*/
#define BGP_MAXMED_ADMIN_UNCONFIGURED false /* Off by default */
uint32_t maxmed_admin_value; /* Max-med value when administrative in on
*/
#define BGP_MAXMED_VALUE_DEFAULT 4294967294 /* Maximum by default */
uint8_t maxmed_active; /* 1/0 if max-med is active or not */
uint32_t maxmed_value; /* Max-med value when its active */
/* BGP update delay on startup */
struct event *t_update_delay;
struct event *t_establish_wait;
struct event *t_revalidate[AFI_MAX][SAFI_MAX];
uint8_t update_delay_over;
uint8_t main_zebra_update_hold;
uint8_t main_peers_update_hold;
uint16_t v_update_delay;
uint16_t v_establish_wait;
char update_delay_begin_time[64];
char update_delay_end_time[64];
char update_delay_zebra_resume_time[64];
char update_delay_peers_resume_time[64];
uint32_t established;
uint32_t restarted_peers;
uint32_t implicit_eors;
uint32_t explicit_eors;
#define BGP_UPDATE_DELAY_DEFAULT 0
/* Reference bandwidth for BGP link-bandwidth. Used when
* the LB value has to be computed based on some other
* factor (e.g., number of multipaths for the prefix)
* Value is in Mbps
*/
uint64_t lb_ref_bw;
#define BGP_LINK_BW_REF_BW 1
/* BGP flags. */
uint64_t flags;
#define BGP_FLAG_ALWAYS_COMPARE_MED (1ULL << 0)
#define BGP_FLAG_DETERMINISTIC_MED (1ULL << 1)
#define BGP_FLAG_MED_MISSING_AS_WORST (1ULL << 2)
#define BGP_FLAG_MED_CONFED (1ULL << 3)
#define BGP_FLAG_NO_CLIENT_TO_CLIENT (1ULL << 4)
#define BGP_FLAG_COMPARE_ROUTER_ID (1ULL << 5)
#define BGP_FLAG_ASPATH_IGNORE (1ULL << 6)
#define BGP_FLAG_IMPORT_CHECK (1ULL << 7)
#define BGP_FLAG_NO_FAST_EXT_FAILOVER (1ULL << 8)
#define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1ULL << 9)
/* This flag is set when we have full BGP Graceful-Restart mode enable */
#define BGP_FLAG_GRACEFUL_RESTART (1ULL << 10)
#define BGP_FLAG_ASPATH_CONFED (1ULL << 11)
#define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1ULL << 12)
#define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1ULL << 13)
#define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1ULL << 14)
#define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1ULL << 15)
#define BGP_FLAG_FORCE_STATIC_PROCESS (1ULL << 16)
#define BGP_FLAG_SHOW_HOSTNAME (1ULL << 17)
#define BGP_FLAG_GR_PRESERVE_FWD (1ULL << 18)
#define BGP_FLAG_GRACEFUL_SHUTDOWN (1ULL << 19)
#define BGP_FLAG_DELETE_IN_PROGRESS (1ULL << 20)
#define BGP_FLAG_SELECT_DEFER_DISABLE (1ULL << 21)
#define BGP_FLAG_GR_DISABLE_EOR (1ULL << 22)
#define BGP_FLAG_EBGP_REQUIRES_POLICY (1ULL << 23)
#define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1ULL << 24)
/* This flag is set if the instance is in administrative shutdown */
#define BGP_FLAG_SHUTDOWN (1ULL << 25)
#define BGP_FLAG_SUPPRESS_FIB_PENDING (1ULL << 26)
#define BGP_FLAG_SUPPRESS_DUPLICATES (1ULL << 27)
#define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1ULL << 29)
/* Indicate Graceful Restart support for BGP NOTIFICATION messages */
#define BGP_FLAG_GRACEFUL_NOTIFICATION (1ULL << 30)
/* Send Hard Reset CEASE Notification for 'Administrative Reset' */
#define BGP_FLAG_HARD_ADMIN_RESET (1ULL << 31)
/* Evaluate the AIGP attribute during the best path selection process */
#define BGP_FLAG_COMPARE_AIGP (1ULL << 32)
/* For BGP-LU, force IPv4 local prefixes to use ipv4-explicit-null label */
#define BGP_FLAG_LU_IPV4_EXPLICIT_NULL (1ULL << 33)
/* For BGP-LU, force IPv6 local prefixes to use ipv6-explicit-null label */
#define BGP_FLAG_LU_IPV6_EXPLICIT_NULL (1ULL << 34)
#define BGP_FLAG_SOFT_VERSION_CAPABILITY (1ULL << 35)
#define BGP_FLAG_ENFORCE_FIRST_AS (1ULL << 36)
#define BGP_FLAG_DYNAMIC_CAPABILITY (1ULL << 37)
#define BGP_FLAG_VNI_DOWN (1ULL << 38)
#define BGP_FLAG_INSTANCE_HIDDEN (1ULL << 39)
/* Prohibit BGP from enabling IPv6 RA on interfaces */
#define BGP_FLAG_IPV6_NO_AUTO_RA (1ULL << 40)
/* BGP default address-families.
* New peers inherit enabled afi/safis from bgp instance.
*/
uint16_t default_af[AFI_MAX][SAFI_MAX];
enum global_mode GLOBAL_GR_FSM[BGP_GLOBAL_GR_MODE]
[BGP_GLOBAL_GR_EVENT_CMD];
enum global_mode global_gr_present_state;
/* This variable stores the current Graceful Restart state of Zebra
* - ZEBRA_GR_ENABLE / ZEBRA_GR_DISABLE
*/
enum zebra_gr_mode present_zebra_gr_state;
/* Is deferred path selection still not complete? */
bool gr_route_sync_pending;
/* BGP Per AF flags */
uint16_t af_flags[AFI_MAX][SAFI_MAX];
#define BGP_CONFIG_DAMPENING (1 << 0)
/* l2vpn evpn flags - 1 << 0 is used for DAMPENNG */
#define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST (1 << 1)
#define BGP_L2VPN_EVPN_ADV_IPV4_UNICAST_GW_IP (1 << 2)
#define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST (1 << 3)
#define BGP_L2VPN_EVPN_ADV_IPV6_UNICAST_GW_IP (1 << 4)
#define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV4 (1 << 5)
#define BGP_L2VPN_EVPN_DEFAULT_ORIGINATE_IPV6 (1 << 6)
/* import/export between address families */
#define BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT (1 << 7)
#define BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT (1 << 8)
/* vrf-route leaking flags */
#define BGP_CONFIG_VRF_TO_VRF_IMPORT (1 << 9)
#define BGP_CONFIG_VRF_TO_VRF_EXPORT (1 << 10)
/* vpnvx retain flag */
#define BGP_VPNVX_RETAIN_ROUTE_TARGET_ALL (1 << 11)
/* BGP per AF peer count */
uint32_t af_peer_count[AFI_MAX][SAFI_MAX];
/* Tree for next-hop lookup cache. */
struct bgp_nexthop_cache_head nexthop_cache_table[AFI_MAX];
/* Tree for import-check */
struct bgp_nexthop_cache_head import_check_table[AFI_MAX];
struct bgp_table *connected_table[AFI_MAX];
struct hash *address_hash;
/* DB for all local tunnel-ips - used mainly for martian checks
Currently it only has all VxLan tunnel IPs*/
struct hash *tip_hash;
/* Static route configuration. */
struct bgp_table *route[AFI_MAX][SAFI_MAX];
/* Aggregate address configuration. */
struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
/* BGP routing information base. */
struct bgp_table *rib[AFI_MAX][SAFI_MAX];
/* BGP table route-map. */
struct bgp_rmap table_map[AFI_MAX][SAFI_MAX];
/* BGP redistribute configuration. */
struct list *redist[AFI_MAX][ZEBRA_ROUTE_MAX];
/* Allocate MPLS labels */
uint8_t allocate_mpls_labels[AFI_MAX][SAFI_MAX];
/* Tree for next-hop lookup cache. */
struct bgp_label_per_nexthop_cache_head
mpls_labels_per_nexthop[AFI_MAX];
/* Tree for mplsvpn next-hop label bind cache */
struct bgp_mplsvpn_nh_label_bind_cache_head mplsvpn_nh_label_bind;
/* Allocate hash entries to store policy routing information
* The hash are used to host pbr rules somewhere.
* Actually, pbr will only be used by flowspec
* those hash elements will have relationship together as
* illustrated in below diagram:
*
* pbr_action a <----- pbr_match i <--- pbr_match_entry 1..n
* <----- pbr_match j <--- pbr_match_entry 1..m
* <----- pbr_rule k
*
* - here in BGP structure, the list of match and actions will
* stand for the list of ipset sets, and table_ids in the kernel
* - the arrow above between pbr_match and pbr_action indicate
* that a backpointer permits match to find the action
* - the arrow betwen match_entry and match is a hash list
* contained in match, that lists the whole set of entries
*/
struct hash *pbr_match_hash;
struct hash *pbr_rule_hash;
struct hash *pbr_action_hash;
/* timer to re-evaluate neighbor default-originate route-maps */
struct event *t_rmap_def_originate_eval;
uint16_t rmap_def_originate_eval_timer;
#define RMAP_DEFAULT_ORIGINATE_EVAL_TIMER 5
/* BGP distance configuration. */
uint8_t distance_ebgp[AFI_MAX][SAFI_MAX];
uint8_t distance_ibgp[AFI_MAX][SAFI_MAX];
uint8_t distance_local[AFI_MAX][SAFI_MAX];
/* BGP default local-preference. */
uint32_t default_local_pref;
/* BGP default subgroup pkt queue max */
uint32_t default_subgroup_pkt_queue_max;
/* BGP default timer. */
uint32_t default_holdtime;
uint32_t default_keepalive;
uint32_t default_connect_retry;
uint32_t default_delayopen;
/* BGP minimum holdtime. */
uint16_t default_min_holdtime;
/* BGP graceful restart */
uint32_t restart_time;
uint32_t stalepath_time;
uint32_t select_defer_time;
struct graceful_restart_info gr_info[AFI_MAX][SAFI_MAX];
uint32_t rib_stale_time;
/* BGP Long-lived Graceful Restart */
uint32_t llgr_stale_time;
#define BGP_ROUTE_SELECT_DELAY 1
#define BGP_MAX_BEST_ROUTE_SELECT 10000
/* Maximum-paths configuration */
struct bgp_maxpaths_cfg {
uint16_t maxpaths_ebgp;
uint16_t maxpaths_ibgp;
bool same_clusterlen;
} maxpaths[AFI_MAX][SAFI_MAX];
_Atomic uint32_t wpkt_quanta; // max # packets to write per i/o cycle
_Atomic uint32_t rpkt_quanta; // max # packets to read per i/o cycle
/* Automatic coalesce adjust on/off */
bool heuristic_coalesce;
/* Actual coalesce time */
uint32_t coalesce_time;
/* Auto-shutdown new peers */
bool autoshutdown;
struct bgp_addpath_bgp_data tx_addpath;
#ifdef ENABLE_BGP_VNC
struct rfapi_cfg *rfapi_cfg;
struct rfapi *rfapi;
#endif
/* EVPN related information */
/* EVI hash table */
struct hash *vnihash;
/*
* VNI hash table based on SVI ifindex as its key.
* We use SVI ifindex as key to lookup a VNI table for gateway IP
* overlay index recursive lookup.
* For this purpose, a hashtable is added which optimizes this lookup.
*/
struct hash *vni_svi_hash;
/* EVPN enable - advertise gateway macip routes */
int advertise_gw_macip;
/* EVPN enable - advertise local VNIs and their MACs etc. */
int advertise_all_vni;
/* draft-ietf-idr-deprecate-as-set-confed-set
* Reject aspaths with AS_SET and/or AS_CONFED_SET.
*/
bool reject_as_sets;
struct bgp_evpn_info *evpn_info;
/* EVPN - use RFC 8365 to auto-derive RT */
int advertise_autort_rfc8365;
/*
* Flooding mechanism for BUM packets for VxLAN-EVPN.
*/
enum vxlan_flood_control vxlan_flood_ctrl;
/* Hash table of Import RTs to EVIs */
struct hash *import_rt_hash;
/* Hash table of VRF import RTs to VRFs */
struct hash *vrf_import_rt_hash;
/* L3-VNI corresponding to this vrf */
vni_t l3vni;
/* router-mac to be used in mac-ip routes for this vrf */
struct ethaddr rmac;
/* originator ip - to be used as NH for type-5 routes */
struct in_addr originator_ip;
/* SVI associated with the L3-VNI corresponding to this vrf */
ifindex_t l3vni_svi_ifindex;
/* RB tree of ES-VRFs */
struct bgp_es_vrf_rb_head es_vrf_rb_tree;
/* Hash table of EVPN nexthops maintained per-tenant-VRF */
struct hash *evpn_nh_table;
/*
* Flag resolve_overlay_index is used for recursive resolution
* procedures for EVPN type-5 route's gateway IP overlay index.
* When this flag is set, we build remote-ip-hash for
* all L2VNIs and resolve overlay index nexthops using this hash.
* Overlay index nexthops remain unresolved if this flag is not set.
*/
bool resolve_overlay_index;
/* vrf flags */
uint32_t vrf_flags;
#define BGP_VRF_AUTO (1 << 0)
#define BGP_VRF_IMPORT_RT_CFGD (1 << 1)
#define BGP_VRF_EXPORT_RT_CFGD (1 << 2)
#define BGP_VRF_IMPORT_AUTO_RT_CFGD (1 << 3) /* retain auto when cfgd */
#define BGP_VRF_EXPORT_AUTO_RT_CFGD (1 << 4) /* retain auto when cfgd */
#define BGP_VRF_RD_CFGD (1 << 5)
#define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 6)
/* per-VRF toVPN SID */
#define BGP_VRF_TOVPN_SID_AUTO (1 << 7)
/* unique ID for auto derivation of RD for this vrf */
uint16_t vrf_rd_id;
/* Automatically derived RD for this VRF */
struct prefix_rd vrf_prd_auto;
/* RD for this VRF */
struct prefix_rd vrf_prd;
char *vrf_prd_pretty;
/* import rt list for the vrf instance */
struct list *vrf_import_rtl;
/* export rt list for the vrf instance */
struct list *vrf_export_rtl;
/* list of corresponding l2vnis (struct bgpevpn) */
struct list *l2vnis;
/* route map for advertise ipv4/ipv6 unicast (type-5 routes) */
struct bgp_rmap adv_cmd_rmap[AFI_MAX][SAFI_MAX];
struct vpn_policy vpn_policy[AFI_MAX];
struct bgp_pbr_config *bgp_pbr_cfg;
/* Count of peers in established state */
uint32_t established_peers;
/* Weighted ECMP related config. */
enum bgp_link_bw_handling lb_handling;
/* Process Queue for handling routes */
struct work_queue *process_queue;
bool fast_convergence;
/* BGP Conditional advertisement */
uint32_t condition_check_period;
uint32_t condition_filter_count;
struct event *t_condition_check;
/* BGP VPN SRv6 backend */
bool srv6_enabled;
char srv6_locator_name[SRV6_LOCNAME_SIZE];
struct srv6_locator *srv6_locator;
struct list *srv6_locator_chunks;
struct list *srv6_functions;
uint32_t tovpn_sid_index; /* unset => set to 0 */
struct in6_addr *tovpn_sid;
struct srv6_locator *tovpn_sid_locator;
uint32_t tovpn_sid_transpose_label;
struct in6_addr *tovpn_zebra_vrf_sid_last_sent;
/* TCP keepalive parameters for BGP connection */
uint16_t tcp_keepalive_idle;
uint16_t tcp_keepalive_intvl;
uint16_t tcp_keepalive_probes;
struct timeval ebgprequirespolicywarning;
#define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
bool allow_martian;
enum asnotation_mode asnotation;
/* BGP route flap dampening configuration */
struct bgp_damp_config damp[AFI_MAX][SAFI_MAX];
QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(bgp);
struct bgp_interface {
#define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
/* L3VPN multi domain switching */
#define BGP_INTERFACE_MPLS_L3VPN_SWITCHING (1 << 1)
uint32_t flags;
};
DECLARE_HOOK(bgp_inst_delete, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_inst_config_write,
(struct bgp *bgp, struct vty *vty),
(bgp, vty));
DECLARE_HOOK(bgp_snmp_traps_config_write, (struct vty *vty), (vty));
DECLARE_HOOK(bgp_config_end, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_hook_vrf_update, (struct vrf *vrf, bool enabled),
(vrf, enabled));
/* Thread callback information */
struct afi_safi_info {
afi_t afi;
safi_t safi;
struct bgp *bgp;
};
#define BGP_ROUTE_ADV_HOLD(bgp) (bgp->main_peers_update_hold)
#define IS_BGP_INST_KNOWN_TO_ZEBRA(bgp) \
(bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT \
|| (bgp->inst_type == BGP_INSTANCE_TYPE_VRF \
&& bgp->vrf_id != VRF_UNKNOWN))
#define BGP_SELECT_DEFER_DISABLE(bgp) \
(CHECK_FLAG(bgp->flags, BGP_FLAG_SELECT_DEFER_DISABLE))
#define BGP_SUPPRESS_FIB_ENABLED(bgp) \
(CHECK_FLAG(bgp->flags, BGP_FLAG_SUPPRESS_FIB_PENDING) \
|| bm->wait_for_fib)
/* BGP peer-group support. */
struct peer_group {
/* Name of the peer-group. */
char *name;
/* Pointer to BGP. */
struct bgp *bgp;
/* Peer-group client list. */
struct list *peer;
/** Dynamic neighbor listening ranges */
struct list *listen_range[AFI_MAX];
/* Peer-group config */
struct peer *conf;
};
/* BGP Notify message format. */
struct bgp_notify {
uint8_t code;
uint8_t subcode;
bgp_size_t length;
bool hard_reset;
char *data;
uint8_t *raw_data;
};
/* Next hop self address. */
struct bgp_nexthop {
struct interface *ifp;
struct in_addr v4;
struct in6_addr v6_global;
struct in6_addr v6_local;
};
/* BGP addpath values */
#define BGP_ADDPATH_RX 1
#define BGP_ADDPATH_TX 2
#define BGP_ADDPATH_ID_LEN 4
#define BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE 1
/* Route map direction */
#define RMAP_IN 0
#define RMAP_OUT 1
#define RMAP_MAX 2
#define BGP_DEFAULT_TTL 1
#define BGP_GTSM_HOPS_DISABLED 0
#define BGP_GTSM_HOPS_CONNECTED 1
/* Advertise map */
#define CONDITION_NON_EXIST false
#define CONDITION_EXIST true
enum update_type { UPDATE_TYPE_WITHDRAW, UPDATE_TYPE_ADVERTISE };
#include "filter.h"
/* BGP filter structure. */
struct bgp_filter {
/* Distribute-list. */
struct {
char *name;
struct access_list *alist;
} dlist[FILTER_MAX];
/* Prefix-list. */
struct {
char *name;
struct prefix_list *plist;
} plist[FILTER_MAX];
/* Filter-list. */
struct {
char *name;
struct as_list *aslist;
} aslist[FILTER_MAX];
/* Route-map. */
struct {
char *name;
struct route_map *map;
} map[RMAP_MAX];
/* Unsuppress-map. */
struct {
char *name;
struct route_map *map;
} usmap;
/* Advertise-map */
struct {
char *aname;
struct route_map *amap;
bool condition;
char *cname;
struct route_map *cmap;
enum update_type update_type;
} advmap;
};
/* IBGP/EBGP identifier. We also have a CONFED peer, which is to say,
a peer who's AS is part of our Confederation. */
enum bgp_peer_sort {
BGP_PEER_UNSPECIFIED,
BGP_PEER_IBGP,
BGP_PEER_EBGP,
BGP_PEER_INTERNAL,
BGP_PEER_CONFED,
};
/* BGP peering sub-types
* E.g.:
* EBGP-OAD - https://datatracker.ietf.org/doc/html/draft-uttaro-idr-bgp-oad
*/
enum bgp_peer_sub_sort {
BGP_PEER_EBGP_OAD = 1,
};
/* BGP message header and packet size. */
#define BGP_MARKER_SIZE 16
#define BGP_HEADER_SIZE 19
#define BGP_STANDARD_MESSAGE_MAX_PACKET_SIZE 4096
#define BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE 65535
#define BGP_MAX_PACKET_SIZE BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
#define BGP_MAX_PACKET_SIZE_OVERFLOW 1024
/*
* Trigger delay for bgp_announce_route().
*/
#define BGP_ANNOUNCE_ROUTE_SHORT_DELAY_MS 100
#define BGP_ANNOUNCE_ROUTE_DELAY_MS 500
struct peer_af {
/* back pointer to the peer */
struct peer *peer;
/* which subgroup the peer_af belongs to */
struct update_subgroup *subgroup;
/* for being part of an update subgroup's peer list */
LIST_ENTRY(peer_af) subgrp_train;
/* for being part of a packet's peer list */
LIST_ENTRY(peer_af) pkt_train;
struct bpacket *next_pkt_to_send;
/*
* Trigger timer for bgp_announce_route().
*/
struct event *t_announce_route;
afi_t afi;
safi_t safi;
int afid;
};
/* BGP GR per peer ds */
#define BGP_PEER_GR_MODE 5
#define BGP_PEER_GR_EVENT_CMD 6
enum peer_mode {
PEER_HELPER = 0,
PEER_GR,
PEER_DISABLE,
PEER_INVALID,
PEER_GLOBAL_INHERIT /* This is the default mode */
};
enum peer_gr_command {
PEER_GR_CMD = 0,
NO_PEER_GR_CMD,
PEER_DISABLE_CMD,
NO_PEER_DISABLE_CMD,
PEER_HELPER_CMD,
NO_PEER_HELPER_CMD
};
typedef unsigned int (*bgp_peer_gr_action_ptr)(struct peer *, enum peer_mode,
enum peer_mode);
struct bgp_peer_gr {
enum peer_mode next_state;
bgp_peer_gr_action_ptr action_fun;
};
/*
* BGP FSM event codes, per RFC 4271 ss. 8.1
*/
enum bgp_fsm_rfc_codes {
BGP_FSM_ManualStart = 1,
BGP_FSM_ManualStop = 2,
BGP_FSM_AutomaticStart = 3,
BGP_FSM_ManualStart_with_PassiveTcpEstablishment = 4,
BGP_FSM_AutomaticStart_with_PassiveTcpEstablishment = 5,
BGP_FSM_AutomaticStart_with_DampPeerOscillations = 6,
BGP_FSM_AutomaticStart_with_DampPeerOscillations_and_PassiveTcpEstablishment =
7,
BGP_FSM_AutomaticStop = 8,
BGP_FSM_ConnectRetryTimer_Expires = 9,
BGP_FSM_HoldTimer_Expires = 10,
BGP_FSM_KeepaliveTimer_Expires = 11,
BGP_FSM_DelayOpenTimer_Expires = 12,
BGP_FSM_IdleHoldTimer_Expires = 13,
BGP_FSM_TcpConnection_Valid = 14,
BGP_FSM_Tcp_CR_Invalid = 15,
BGP_FSM_Tcp_CR_Acked = 16,
BGP_FSM_TcpConnectionConfirmed = 17,
BGP_FSM_TcpConnectionFails = 18,
BGP_FSM_BGPOpen = 19,
BGP_FSM_BGPOpen_with_DelayOpenTimer_running = 20,
BGP_FSM_BGPHeaderErr = 21,
BGP_FSM_BGPOpenMsgErr = 22,
BGP_FSM_OpenCollisionDump = 23,
BGP_FSM_NotifMsgVerErr = 24,
BGP_FSM_NotifMsg = 25,
BGP_FSM_KeepAliveMsg = 26,
BGP_FSM_UpdateMsg = 27,
BGP_FSM_UpdateMsgErr = 28
};
/*
* BGP finite state machine events
*
* Note: these do not correspond to RFC-defined event codes. Those are
* defined elsewhere.
*/
enum bgp_fsm_events {
BGP_Start = 1,
BGP_Stop,
TCP_connection_open,
TCP_connection_open_w_delay,
TCP_connection_closed,
TCP_connection_open_failed,
TCP_fatal_error,
ConnectRetry_timer_expired,
Hold_Timer_expired,
KeepAlive_timer_expired,
DelayOpen_timer_expired,
Receive_OPEN_message,
Receive_KEEPALIVE_message,
Receive_UPDATE_message,
Receive_NOTIFICATION_message,
Clearing_Completed,
BGP_EVENTS_MAX,
};
/* BGP finite state machine status. */
enum bgp_fsm_status {
Idle = 1,
Connect,
Active,
OpenSent,
OpenConfirm,
Established,
Clearing,
Deleted,
BGP_STATUS_MAX,
};
#define PEER_HOSTNAME(peer) ((peer)->host ? (peer)->host : "(unknown peer)")
struct llgr_info {
uint32_t stale_time;
uint8_t flags;
};
struct addpath_paths_limit {
uint16_t send;
uint16_t receive;
};
struct peer_connection {
struct peer *peer;
/* Status of the peer connection. */
enum bgp_fsm_status status;
enum bgp_fsm_status ostatus;
int fd;
/* Thread flags */
_Atomic uint32_t thread_flags;
#define PEER_THREAD_WRITES_ON (1U << 0)
#define PEER_THREAD_READS_ON (1U << 1)
/* Packet receive and send buffer. */
pthread_mutex_t io_mtx; // guards ibuf, obuf
struct stream_fifo *ibuf; // packets waiting to be processed
struct stream_fifo *obuf; // packets waiting to be written
struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
struct event *t_read;
struct event *t_write;
struct event *t_connect;
struct event *t_delayopen;
struct event *t_start;
struct event *t_holdtime;
struct event *t_connect_check_r;
struct event *t_connect_check_w;
struct event *t_gr_restart;
struct event *t_gr_stale;
struct event *t_generate_updgrp_packets;
struct event *t_pmax_restart;
struct event *t_routeadv;
struct event *t_process_packet;
struct event *t_process_packet_error;
union sockunion su;
#define BGP_CONNECTION_SU_UNSPEC(connection) \
(connection->su.sa.sa_family == AF_UNSPEC)
};
extern struct peer_connection *bgp_peer_connection_new(struct peer *peer);
extern void bgp_peer_connection_free(struct peer_connection **connection);
extern void bgp_peer_connection_buffers_free(struct peer_connection *connection);
/* BGP neighbor structure. */
struct peer {
/* BGP structure. */
struct bgp *bgp;
/* reference count, primarily to allow bgp_process'ing of route_node's
* to be done after a struct peer is deleted.
*
* named 'lock' for hysterical reasons within Quagga.
*/
int lock;
/* BGP peer group. */
struct peer_group *group;
/* BGP peer_af structures, per configured AF on this peer */
struct peer_af *peer_af_array[BGP_AF_MAX];
/* Peer's remote AS number. */
enum peer_asn_type as_type;
as_t as;
/* for vty as format */
char *as_pretty;
/* Peer's local AS number. */
as_t local_as;
enum bgp_peer_sort sort;
enum bgp_peer_sub_sort sub_sort;
/* Peer's Change local AS number. */
as_t change_local_as;
/* for vty as format */
char *change_local_as_pretty;
/* Remote router ID. */
struct in_addr remote_id;
/* Local router ID. */
struct in_addr local_id;
struct stream *curr; // the current packet being parsed
/* the doppelganger peer structure, due to dual TCP conn setup */
struct peer *doppelganger;
/* FSM events, stored for debug purposes.
* Note: uchar used for reduced memory usage.
*/
enum bgp_fsm_events cur_event;
enum bgp_fsm_events last_event;
enum bgp_fsm_events last_major_event;
/* Peer index, used for dumping TABLE_DUMP_V2 format */
uint16_t table_dump_index;
/* Peer information */
/*
* We will have 2 `struct peer_connection` data structures
* connection is our attempt to talk to our peer. incoming
* is the peer attempting to talk to us. When it is
* time to consolidate between the two, we'll solidify
* into the connection variable being used.
*/
struct peer_connection *connection;
int ttl; /* TTL of TCP connection to the peer. */
int rtt; /* Estimated round-trip-time from TCP_INFO */
int rtt_expected; /* Expected round-trip-time for a peer */
uint8_t rtt_keepalive_rcv; /* Received count for RTT shutdown */
uint8_t rtt_keepalive_conf; /* Configured count for RTT shutdown */
int gtsm_hops; /* minimum hopcount to peer */
char *desc; /* Description of the peer. */
unsigned short port; /* Destination port for peer */
char *host; /* Printable address of the peer. */
time_t uptime; /* Last Up/Down time */
time_t readtime; /* Last read time */
time_t resettime; /* Last reset time */
char *conf_if; /* neighbor interface config name. */
struct interface *ifp; /* corresponding interface */
char *ifname; /* bind interface name. */
char *update_if;
union sockunion *update_source;
union sockunion *su_local; /* Sockunion of local address. */
union sockunion *su_remote; /* Sockunion of remote address. */
int shared_network; /* Is this peer shared same network. */
struct bgp_nexthop nexthop; /* Nexthop */
/* Roles in bgp session */
uint8_t local_role;
uint8_t remote_role;
#define ROLE_PROVIDER 0
#define ROLE_RS_SERVER 1
#define ROLE_RS_CLIENT 2
#define ROLE_CUSTOMER 3
#define ROLE_PEER 4
#define ROLE_UNDEFINED 255
#define ROLE_NAME_MAX_LEN 20
/* Peer address family configuration. */
uint8_t afc[AFI_MAX][SAFI_MAX];
uint8_t afc_nego[AFI_MAX][SAFI_MAX];
uint8_t afc_adv[AFI_MAX][SAFI_MAX];
uint8_t afc_recv[AFI_MAX][SAFI_MAX];
/* Capability flags (reset in bgp_stop) */
uint64_t cap;
#define PEER_CAP_REFRESH_ADV (1ULL << 0) /* refresh advertised */
#define PEER_CAP_REFRESH_RCV (1ULL << 2) /* refresh rfc received */
#define PEER_CAP_DYNAMIC_ADV (1ULL << 3) /* dynamic advertised */
#define PEER_CAP_DYNAMIC_RCV (1ULL << 4) /* dynamic received */
#define PEER_CAP_RESTART_ADV (1ULL << 5) /* restart advertised */
#define PEER_CAP_RESTART_RCV (1ULL << 6) /* restart received */
#define PEER_CAP_AS4_ADV (1ULL << 7) /* as4 advertised */
#define PEER_CAP_AS4_RCV (1ULL << 8) /* as4 received */
/* sent graceful-restart restart (R) bit */
#define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1ULL << 9)
/* received graceful-restart restart (R) bit */
#define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1ULL << 10)
#define PEER_CAP_ADDPATH_ADV (1ULL << 11) /* addpath advertised */
#define PEER_CAP_ADDPATH_RCV (1ULL << 12) /* addpath received */
#define PEER_CAP_ENHE_ADV (1ULL << 13) /* Extended nexthop advertised */
#define PEER_CAP_ENHE_RCV (1ULL << 14) /* Extended nexthop received */
#define PEER_CAP_HOSTNAME_ADV (1ULL << 15) /* hostname advertised */
#define PEER_CAP_HOSTNAME_RCV (1ULL << 16) /* hostname received */
#define PEER_CAP_ENHANCED_RR_ADV (1ULL << 17) /* enhanced rr advertised */
#define PEER_CAP_ENHANCED_RR_RCV (1ULL << 18) /* enhanced rr received */
#define PEER_CAP_EXTENDED_MESSAGE_ADV (1ULL << 19)
#define PEER_CAP_EXTENDED_MESSAGE_RCV (1ULL << 20)
#define PEER_CAP_LLGR_ADV (1ULL << 21)
#define PEER_CAP_LLGR_RCV (1ULL << 22)
/* sent graceful-restart notification (N) bit */
#define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1ULL << 23)
/* received graceful-restart notification (N) bit */
#define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1ULL << 24)
#define PEER_CAP_ROLE_ADV (1ULL << 25) /* role advertised */
#define PEER_CAP_ROLE_RCV (1ULL << 26) /* role received */
#define PEER_CAP_SOFT_VERSION_ADV (1ULL << 27)
#define PEER_CAP_SOFT_VERSION_RCV (1ULL << 28)
#define PEER_CAP_PATHS_LIMIT_ADV (1U << 29)
#define PEER_CAP_PATHS_LIMIT_RCV (1U << 30)
/* Capability flags (reset in bgp_stop) */
uint32_t af_cap[AFI_MAX][SAFI_MAX];
#define PEER_CAP_ORF_PREFIX_SM_ADV (1U << 0) /* send-mode advertised */
#define PEER_CAP_ORF_PREFIX_RM_ADV (1U << 1) /* receive-mode advertised */
#define PEER_CAP_ORF_PREFIX_SM_RCV (1U << 2) /* send-mode received */
#define PEER_CAP_ORF_PREFIX_RM_RCV (1U << 3) /* receive-mode received */
#define PEER_CAP_RESTART_AF_RCV (1U << 6) /* graceful restart afi/safi received */
#define PEER_CAP_RESTART_AF_PRESERVE_RCV (1U << 7) /* graceful restart afi/safi F-bit received */
#define PEER_CAP_ADDPATH_AF_TX_ADV (1U << 8) /* addpath tx advertised */
#define PEER_CAP_ADDPATH_AF_TX_RCV (1U << 9) /* addpath tx received */
#define PEER_CAP_ADDPATH_AF_RX_ADV (1U << 10) /* addpath rx advertised */
#define PEER_CAP_ADDPATH_AF_RX_RCV (1U << 11) /* addpath rx received */
#define PEER_CAP_ENHE_AF_ADV (1U << 12) /* Extended nexthopi afi/safi advertised */
#define PEER_CAP_ENHE_AF_RCV (1U << 13) /* Extended nexthop afi/safi received */
#define PEER_CAP_ENHE_AF_NEGO (1U << 14) /* Extended nexthop afi/safi negotiated */
#define PEER_CAP_LLGR_AF_ADV (1U << 15)
#define PEER_CAP_LLGR_AF_RCV (1U << 16)
#define PEER_CAP_PATHS_LIMIT_AF_ADV (1U << 17)
#define PEER_CAP_PATHS_LIMIT_AF_RCV (1U << 18)
/* Global configuration flags. */
/*
* Parallel array to flags that indicates whether each flag originates
* from a peer-group or if it is config that is specific to this
* individual peer. If a flag is set independent of the peer-group, the
* same bit should be set here. If this peer is a peer-group, this
* memory region should be all zeros.
*
* The assumption is that the default state for all flags is unset,
* so if a flag is unset, the corresponding override flag is unset too.
* However if a flag is set, the corresponding override flag is set.
*/
uint64_t flags_override;
/*
* Parallel array to flags that indicates whether the default behavior
* of *flags_override* should be inverted. If a flag is unset and the
* corresponding invert flag is set, the corresponding override flag
* would be set. However if a flag is set and the corresponding invert
* flag is unset, the corresponding override flag would be unset.
*
* This can be used for attributes like *send-community*, which are
* implicitely enabled and have to be disabled explicitely, compared to
* 'normal' attributes like *next-hop-self* which are implicitely set.
*
* All operations dealing with flags should apply the following boolean
* logic to keep the internal flag system in a sane state:
*
* value=0 invert=0 Inherit flag if member, otherwise unset flag
* value=0 invert=1 Unset flag unconditionally
* value=1 invert=0 Set flag unconditionally
* value=1 invert=1 Inherit flag if member, otherwise set flag
*
* Contrary to the implementation of *flags_override*, the flag
* inversion state can be set either on the peer OR the peer *and* the
* peer-group. This was done on purpose, as the inversion state of a
* flag can be determined on either the peer or the peer-group.
*
* Example: Enabling the cisco configuration mode inverts all flags
* related to *send-community* unconditionally for both peer-groups and
* peers.
*
* This behavior is different for interface peers though, which enable
* the *extended-nexthop* flag by default, which regular peers do not.
* As the peer-group can contain both regular and interface peers, the
* flag inversion state must be set on the peer only.
*
* When a peer inherits the configuration from a peer-group and the
* inversion state of the flag differs between peer and peer-group, the
* newly set value must equal to the inverted state of the peer-group.
*/
uint64_t flags_invert;
/*
* Effective array for storing the peer/peer-group flags. In case of a
* peer-group, the peer-specific overrides (see flags_override and
* flags_invert) must be respected.
* When changing the structure of flags/af_flags, do not forget to
* change flags_invert/flags_override too.
*/
uint64_t flags;
#define PEER_FLAG_PASSIVE (1ULL << 0) /* passive mode */
#define PEER_FLAG_SHUTDOWN (1ULL << 1) /* shutdown */
#define PEER_FLAG_DONT_CAPABILITY (1ULL << 2) /* dont-capability */
#define PEER_FLAG_OVERRIDE_CAPABILITY (1ULL << 3) /* override-capability */
#define PEER_FLAG_STRICT_CAP_MATCH (1ULL << 4) /* strict-match */
#define PEER_FLAG_DYNAMIC_CAPABILITY (1ULL << 5) /* dynamic capability */
#define PEER_FLAG_DISABLE_CONNECTED_CHECK (1ULL << 6) /* disable-connected-check */
#define PEER_FLAG_LOCAL_AS_NO_PREPEND (1ULL << 7) /* local-as no-prepend */
#define PEER_FLAG_LOCAL_AS_REPLACE_AS (1ULL << 8) /* local-as no-prepend replace-as */
#define PEER_FLAG_DELETE (1ULL << 9) /* mark the peer for deleting */
#define PEER_FLAG_CONFIG_NODE (1ULL << 10) /* the node to update configs on */
#define PEER_FLAG_LONESOUL (1ULL << 11)
#define PEER_FLAG_DYNAMIC_NEIGHBOR (1ULL << 12) /* dynamic neighbor */
#define PEER_FLAG_CAPABILITY_ENHE (1ULL << 13) /* Extended next-hop (rfc 5549)*/
#define PEER_FLAG_IFPEER_V6ONLY (1ULL << 14) /* if-based peer is v6 only */
#define PEER_FLAG_IS_RFAPI_HD (1ULL << 15) /* attached to rfapi HD */
#define PEER_FLAG_ENFORCE_FIRST_AS (1ULL << 16) /* enforce-first-as */
#define PEER_FLAG_ROUTEADV (1ULL << 17) /* route advertise */
#define PEER_FLAG_TIMER (1ULL << 18) /* keepalive & holdtime */
#define PEER_FLAG_TIMER_CONNECT (1ULL << 19) /* connect timer */
#define PEER_FLAG_PASSWORD (1ULL << 20) /* password */
#define PEER_FLAG_LOCAL_AS (1ULL << 21) /* local-as */
#define PEER_FLAG_UPDATE_SOURCE (1ULL << 22) /* update-source */
/* BGP-GR Peer related flags */
#define PEER_FLAG_GRACEFUL_RESTART_HELPER (1ULL << 23) /* Helper */
#define PEER_FLAG_GRACEFUL_RESTART (1ULL << 24) /* Graceful Restart */
#define PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT (1ULL << 25) /* Global-Inherit */
#define PEER_FLAG_RTT_SHUTDOWN (1ULL << 26) /* shutdown rtt */
#define PEER_FLAG_TIMER_DELAYOPEN (1ULL << 27) /* delayopen timer */
#define PEER_FLAG_TCP_MSS (1ULL << 28) /* tcp-mss */
/* Disable IEEE floating-point link bandwidth encoding in
* extended communities.
*/
#define PEER_FLAG_DISABLE_LINK_BW_ENCODING_IEEE (1ULL << 29)
/* force the extended format for Optional Parameters in OPEN message */
#define PEER_FLAG_EXTENDED_OPT_PARAMS (1ULL << 30)
/* BGP Open Policy flags.
* Enforce using roles on both sides:
* `local-role ROLE strict-mode` configured.
*/
#define PEER_FLAG_ROLE_STRICT_MODE (1ULL << 31)
/* `local-role` configured */
#define PEER_FLAG_ROLE (1ULL << 32)
#define PEER_FLAG_PORT (1ULL << 33)
#define PEER_FLAG_AIGP (1ULL << 34)
#define PEER_FLAG_GRACEFUL_SHUTDOWN (1ULL << 35)
#define PEER_FLAG_CAPABILITY_SOFT_VERSION (1ULL << 36)
#define PEER_FLAG_CAPABILITY_FQDN (1ULL << 37) /* fqdn capability */
#define PEER_FLAG_AS_LOOP_DETECTION (1ULL << 38) /* as path loop detection */
#define PEER_FLAG_EXTENDED_LINK_BANDWIDTH (1ULL << 39)
#define PEER_FLAG_DUAL_AS (1ULL << 40)
/*
*GR-Disabled mode means unset PEER_FLAG_GRACEFUL_RESTART
*& PEER_FLAG_GRACEFUL_RESTART_HELPER
*and PEER_FLAG_GRACEFUL_RESTART_GLOBAL_INHERIT
*/
struct bgp_peer_gr PEER_GR_FSM[BGP_PEER_GR_MODE][BGP_PEER_GR_EVENT_CMD];
enum peer_mode peer_gr_present_state;
/* Non stop forwarding afi-safi count for BGP gr feature*/
uint8_t nsf_af_count;
uint8_t peer_gr_new_status_flag;
#define PEER_GRACEFUL_RESTART_NEW_STATE_HELPER (1U << 0)
#define PEER_GRACEFUL_RESTART_NEW_STATE_RESTART (1U << 1)
#define PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT (1U << 2)
/* outgoing message sent in CEASE_ADMIN_SHUTDOWN notify */
char *tx_shutdown_message;
/* NSF mode (graceful restart) */
uint8_t nsf[AFI_MAX][SAFI_MAX];
/* EOR Send time */
time_t eor_stime[AFI_MAX][SAFI_MAX];
/* Last update packet sent time */
time_t pkt_stime[AFI_MAX][SAFI_MAX];
/* Peer / peer group route flap dampening configuration */
struct bgp_damp_config damp[AFI_MAX][SAFI_MAX];
/* Peer Per AF flags */
/*
* Please consult the comments for *flags_override*, *flags_invert* and
* *flags* to understand what these three arrays do. The address-family
* specific attributes are being treated the exact same way as global
* peer attributes.
*/
uint64_t af_flags_override[AFI_MAX][SAFI_MAX];
uint64_t af_flags_invert[AFI_MAX][SAFI_MAX];
uint64_t af_flags[AFI_MAX][SAFI_MAX];
#define PEER_FLAG_SEND_COMMUNITY (1ULL << 0)
#define PEER_FLAG_SEND_EXT_COMMUNITY (1ULL << 1)
#define PEER_FLAG_NEXTHOP_SELF (1ULL << 2)
#define PEER_FLAG_REFLECTOR_CLIENT (1ULL << 3)
#define PEER_FLAG_RSERVER_CLIENT (1ULL << 4)
#define PEER_FLAG_SOFT_RECONFIG (1ULL << 5)
#define PEER_FLAG_AS_PATH_UNCHANGED (1ULL << 6)
#define PEER_FLAG_NEXTHOP_UNCHANGED (1ULL << 7)
#define PEER_FLAG_MED_UNCHANGED (1ULL << 8)
#define PEER_FLAG_DEFAULT_ORIGINATE (1ULL << 9)
#define PEER_FLAG_REMOVE_PRIVATE_AS (1ULL << 10)
#define PEER_FLAG_ALLOWAS_IN (1ULL << 11)
#define PEER_FLAG_ORF_PREFIX_SM (1ULL << 12)
#define PEER_FLAG_ORF_PREFIX_RM (1ULL << 13)
#define PEER_FLAG_MAX_PREFIX (1ULL << 14)
#define PEER_FLAG_MAX_PREFIX_WARNING (1ULL << 15)
#define PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED (1ULL << 16)
#define PEER_FLAG_FORCE_NEXTHOP_SELF (1ULL << 17)
#define PEER_FLAG_REMOVE_PRIVATE_AS_ALL (1ULL << 18)
#define PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE (1ULL << 19)
#define PEER_FLAG_AS_OVERRIDE (1ULL << 20)
#define PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE (1ULL << 21)
#define PEER_FLAG_WEIGHT (1ULL << 22)
#define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 23)
#define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 24)
#define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 25)
#define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 26)
#define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 27)
#define PEER_FLAG_SOO (1ULL << 28)
#define PEER_FLAG_SEND_EXT_COMMUNITY_RPKI (1ULL << 29)
#define PEER_FLAG_ADDPATH_RX_PATHS_LIMIT (1ULL << 30)
#define PEER_FLAG_CONFIG_DAMPENING (1U << 31)
#define PEER_FLAG_ACCEPT_OWN (1ULL << 63)
enum bgp_addpath_strat addpath_type[AFI_MAX][SAFI_MAX];
/* MD5 password */
char *password;
/* default-originate route-map. */
struct {
char *name;
struct route_map *map;
} default_rmap[AFI_MAX][SAFI_MAX];
/* Peer status flags. */
uint16_t sflags;
#define PEER_STATUS_ACCEPT_PEER (1U << 0) /* accept peer */
#define PEER_STATUS_PREFIX_OVERFLOW (1U << 1) /* prefix-overflow */
#define PEER_STATUS_CAPABILITY_OPEN (1U << 2) /* capability open send */
#define PEER_STATUS_HAVE_ACCEPT (1U << 3) /* accept peer's parent */
#define PEER_STATUS_GROUP (1U << 4) /* peer-group conf */
#define PEER_STATUS_NSF_MODE (1U << 5) /* NSF aware peer */
#define PEER_STATUS_NSF_WAIT (1U << 6) /* wait comeback peer */
/* received extended format encoding for OPEN message */
#define PEER_STATUS_EXT_OPT_PARAMS_LENGTH (1U << 7)
/* Peer status af flags (reset in bgp_stop) */
uint16_t af_sflags[AFI_MAX][SAFI_MAX];
#define PEER_STATUS_ORF_PREFIX_SEND (1U << 0) /* prefix-list send peer */
#define PEER_STATUS_ORF_WAIT_REFRESH (1U << 1) /* wait refresh received peer */
#define PEER_STATUS_PREFIX_THRESHOLD (1U << 2) /* exceed prefix-threshold */
#define PEER_STATUS_PREFIX_LIMIT (1U << 3) /* exceed prefix-limit */
#define PEER_STATUS_EOR_SEND (1U << 4) /* end-of-rib send to peer */
#define PEER_STATUS_EOR_RECEIVED (1U << 5) /* end-of-rib received from peer */
#define PEER_STATUS_ENHANCED_REFRESH (1U << 6) /* Enhanced Route Refresh */
#define PEER_STATUS_BORR_SEND (1U << 7) /* BoRR send to peer */
#define PEER_STATUS_BORR_RECEIVED (1U << 8) /* BoRR received from peer */
#define PEER_STATUS_EORR_SEND (1U << 9) /* EoRR send to peer */
#define PEER_STATUS_EORR_RECEIVED (1U << 10) /* EoRR received from peer */
/* LLGR aware peer */
#define PEER_STATUS_LLGR_WAIT (1U << 11)
#define PEER_STATUS_REFRESH_PENDING (1U << 12) /* refresh request from peer */
#define PEER_STATUS_RTT_SHUTDOWN (1U << 13) /* In shutdown state due to RTT */
/* Configured timer values. */
_Atomic uint32_t holdtime;
_Atomic uint32_t keepalive;
_Atomic uint32_t connect;
_Atomic uint32_t routeadv;
_Atomic uint32_t delayopen;
/* Timer values. */
_Atomic uint32_t v_start;
_Atomic uint32_t v_connect;
_Atomic uint32_t v_holdtime;
_Atomic uint32_t v_keepalive;
_Atomic uint32_t v_routeadv;
_Atomic uint32_t v_delayopen;
_Atomic uint32_t v_pmax_restart;
_Atomic uint32_t v_gr_restart;
/* Threads. */
struct event *t_llgr_stale[AFI_MAX][SAFI_MAX];
struct event *t_revalidate_all[AFI_MAX][SAFI_MAX];
struct event *t_refresh_stalepath;
/* Thread flags. */
_Atomic uint32_t thread_flags;
#define PEER_THREAD_KEEPALIVES_ON (1U << 0)
#define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 1)
/* workqueues */
struct work_queue *clear_node_queue;
#define PEER_TOTAL_RX(peer) \
atomic_load_explicit(&peer->open_in, memory_order_relaxed) \
+ atomic_load_explicit(&peer->update_in, memory_order_relaxed) \
+ atomic_load_explicit(&peer->notify_in, memory_order_relaxed) \
+ atomic_load_explicit(&peer->refresh_in, \
memory_order_relaxed) \
+ atomic_load_explicit(&peer->keepalive_in, \
memory_order_relaxed) \
+ atomic_load_explicit(&peer->dynamic_cap_in, \
memory_order_relaxed)
#define PEER_TOTAL_TX(peer) \
atomic_load_explicit(&peer->open_out, memory_order_relaxed) \
+ atomic_load_explicit(&peer->update_out, \
memory_order_relaxed) \
+ atomic_load_explicit(&peer->notify_out, \
memory_order_relaxed) \
+ atomic_load_explicit(&peer->refresh_out, \
memory_order_relaxed) \
+ atomic_load_explicit(&peer->keepalive_out, \
memory_order_relaxed) \
+ atomic_load_explicit(&peer->dynamic_cap_out, \
memory_order_relaxed)
/* Statistics field */
_Atomic uint32_t open_in; /* Open message input count */
_Atomic uint32_t open_out; /* Open message output count */
_Atomic uint32_t update_in; /* Update message input count */
_Atomic uint32_t update_out; /* Update message ouput count */
_Atomic time_t update_time; /* Update message received time. */
_Atomic uint32_t keepalive_in; /* Keepalive input count */
_Atomic uint32_t keepalive_out; /* Keepalive output count */
_Atomic uint32_t notify_in; /* Notify input count */
_Atomic uint32_t notify_out; /* Notify output count */
_Atomic uint32_t refresh_in; /* Route Refresh input count */
_Atomic uint32_t refresh_out; /* Route Refresh output count */
_Atomic uint32_t dynamic_cap_in; /* Dynamic Capability input count. */
_Atomic uint32_t dynamic_cap_out; /* Dynamic Capability output count. */
uint32_t stat_pfx_filter;
uint32_t stat_pfx_aspath_loop;
uint32_t stat_pfx_originator_loop;
uint32_t stat_pfx_cluster_loop;
uint32_t stat_pfx_nh_invalid;
uint32_t stat_pfx_dup_withdraw;
uint32_t stat_upd_7606; /* RFC7606: treat-as-withdraw */
uint64_t stat_pfx_loc_rib; /* RFC7854 : Number of routes in Loc-RIB */
uint64_t stat_pfx_adj_rib_in; /* RFC7854 : Number of routes in Adj-RIBs-In */
/* BGP state count */
uint32_t established; /* Established */
uint32_t dropped; /* Dropped */
/* Update delay related fields */
uint8_t update_delay_over; /* When this is set, BGP is no more waiting
for EOR */
time_t synctime;
/* timestamp when the last UPDATE msg was written */
_Atomic time_t last_write;
/* timestamp when the last msg was written */
_Atomic time_t last_update;
/* only updated under io_mtx.
* last_sendq_warn is only for ratelimiting log warning messages.
*/
time_t last_sendq_ok, last_sendq_warn;
/* Notify data. */
struct bgp_notify notify;
/* Filter structure. */
struct bgp_filter filter[AFI_MAX][SAFI_MAX];
/*
* Parallel array to filter that indicates whether each filter
* originates from a peer-group or if it is config that is specific to
* this individual peer. If a filter is set independent of the
* peer-group the appropriate bit should be set here. If this peer is a
* peer-group, this memory region should be all zeros. The assumption
* is that the default state for all flags is unset. Due to filters
* having a direction (e.g. in/out/...), this array has a third
* dimension for storing the overrides independently per direction.
*
* Notes:
* - if a filter for an individual peer is unset, the corresponding
* override flag is unset and the peer is considered to be back in
* sync with the peer-group.
* - This does *not* contain the filter values, rather it contains
* whether the filter in filter (struct bgp_filter) is peer-specific.
*/
uint8_t filter_override[AFI_MAX][SAFI_MAX][FILTER_MAX];
#define PEER_FT_DISTRIBUTE_LIST (1U << 0) /* distribute-list */
#define PEER_FT_FILTER_LIST (1U << 1) /* filter-list */
#define PEER_FT_PREFIX_LIST (1U << 2) /* prefix-list */
#define PEER_FT_ROUTE_MAP (1U << 3) /* route-map */
#define PEER_FT_UNSUPPRESS_MAP (1U << 4) /* unsuppress-map */
#define PEER_FT_ADVERTISE_MAP (1U << 5) /* advertise-map */
/* ORF Prefix-list */
struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
/* Text description of last attribute rcvd */
char rcvd_attr_str[BUFSIZ];
/* Track if we printed the attribute in debugs */
int rcvd_attr_printed;
/* Accepted prefix count */
uint32_t pcount[AFI_MAX][SAFI_MAX];
/* Max prefix count. */
uint32_t pmax[AFI_MAX][SAFI_MAX];
uint8_t pmax_threshold[AFI_MAX][SAFI_MAX];
uint16_t pmax_restart[AFI_MAX][SAFI_MAX];
#define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75
/* Send prefix count. */
uint32_t pmax_out[AFI_MAX][SAFI_MAX];
/* allowas-in. */
char allowas_in[AFI_MAX][SAFI_MAX];
/* soo */
struct ecommunity *soo[AFI_MAX][SAFI_MAX];
/* weight */
unsigned long weight[AFI_MAX][SAFI_MAX];
/* peer reset cause */
uint8_t last_reset;
#define PEER_DOWN_RID_CHANGE 1U /* bgp router-id command */
#define PEER_DOWN_REMOTE_AS_CHANGE 2U /* neighbor remote-as command */
#define PEER_DOWN_LOCAL_AS_CHANGE 3U /* neighbor local-as command */
#define PEER_DOWN_CLID_CHANGE 4U /* bgp cluster-id command */
#define PEER_DOWN_CONFED_ID_CHANGE 5U /* bgp confederation id command */
#define PEER_DOWN_CONFED_PEER_CHANGE 6U /* bgp confederation peer command */
#define PEER_DOWN_RR_CLIENT_CHANGE 7U /* neighbor rr-client command */
#define PEER_DOWN_RS_CLIENT_CHANGE 8U /* neighbor rs-client command */
#define PEER_DOWN_UPDATE_SOURCE_CHANGE 9U /* neighbor update-source command */
#define PEER_DOWN_AF_ACTIVATE 10U /* neighbor activate command */
#define PEER_DOWN_USER_SHUTDOWN 11U /* neighbor shutdown command */
#define PEER_DOWN_USER_RESET 12U /* clear ip bgp command */
#define PEER_DOWN_NOTIFY_RECEIVED 13U /* notification received */
#define PEER_DOWN_NOTIFY_SEND 14U /* notification send */
#define PEER_DOWN_CLOSE_SESSION 15U /* tcp session close */
#define PEER_DOWN_NEIGHBOR_DELETE 16U /* neghbor delete */
#define PEER_DOWN_RMAP_BIND 17U /* neghbor peer-group command */
#define PEER_DOWN_RMAP_UNBIND 18U /* no neighbor peer-group command */
#define PEER_DOWN_CAPABILITY_CHANGE 19U /* neighbor capability command */
#define PEER_DOWN_PASSIVE_CHANGE 20U /* neighbor passive command */
#define PEER_DOWN_MULTIHOP_CHANGE 21U /* neighbor multihop command */
#define PEER_DOWN_NSF_CLOSE_SESSION 22U /* NSF tcp session close */
#define PEER_DOWN_V6ONLY_CHANGE 23U /* if-based peering v6only toggled */
#define PEER_DOWN_BFD_DOWN 24U /* BFD down */
#define PEER_DOWN_IF_DOWN 25U /* Interface down */
#define PEER_DOWN_NBR_ADDR_DEL 26U /* Peer address lost */
#define PEER_DOWN_WAITING_NHT 27U /* Waiting for NHT to resolve */
#define PEER_DOWN_NBR_ADDR 28U /* Waiting for peer IPv6 IP Addr */
#define PEER_DOWN_VRF_UNINIT 29U /* Associated VRF is not init yet */
#define PEER_DOWN_NOAFI_ACTIVATED 30U /* No AFI/SAFI activated for peer */
#define PEER_DOWN_AS_SETS_REJECT 31U /* Reject routes with AS_SET */
#define PEER_DOWN_WAITING_OPEN 32U /* Waiting for open to succeed */
#define PEER_DOWN_PFX_COUNT 33U /* Reached received prefix count */
#define PEER_DOWN_SOCKET_ERROR 34U /* Some socket error happened */
#define PEER_DOWN_RTT_SHUTDOWN 35U /* Automatically shutdown due to RTT */
#define PEER_DOWN_SUPPRESS_FIB_PENDING 36U /* Suppress fib pending changed */
#define PEER_DOWN_PASSWORD_CHANGE 37U /* neighbor password command */
/*
* Remember to update peer_down_str in bgp_fsm.c when you add
* a new value to the last_reset reason
*/
struct stream *last_reset_cause;
/* The kind of route-map Flags.*/
uint8_t rmap_type;
#define PEER_RMAP_TYPE_IN (1U << 0) /* neighbor route-map in */
#define PEER_RMAP_TYPE_OUT (1U << 1) /* neighbor route-map out */
#define PEER_RMAP_TYPE_NETWORK (1U << 2) /* network route-map */
#define PEER_RMAP_TYPE_REDISTRIBUTE (1U << 3) /* redistribute route-map */
#define PEER_RMAP_TYPE_DEFAULT (1U << 4) /* default-originate route-map */
#define PEER_RMAP_TYPE_AGGREGATE (1U << 5) /* aggregate-address route-map */
/** Peer overwrite configuration. */
struct bfd_session_config {
/**
* Manual configuration bit.
*
* This flag only makes sense for real peers (and not groups),
* it keeps track if the user explicitly configured BFD for a
* peer.
*/
bool manual;
/** Control Plane Independent. */
bool cbit;
/** Detection multiplier. */
uint8_t detection_multiplier;
/** Minimum required RX interval. */
uint32_t min_rx;
/** Minimum required TX interval. */
uint32_t min_tx;
/** Profile name. */
char profile[BFD_PROFILE_NAME_LEN];
/** Peer BFD session */
struct bfd_session_params *session;
} * bfd_config;
/* hostname and domainname advertised by host */
char *hostname;
char *domainname;
/* Extended Message Support */
uint16_t max_packet_size;
/* Conditional advertisement */
bool advmap_config_change[AFI_MAX][SAFI_MAX];
bool advmap_table_change;
/* set TCP max segment size */
uint32_t tcp_mss;
/* Long-lived Graceful Restart */
struct llgr_info llgr[AFI_MAX][SAFI_MAX];
bool shut_during_cfg;
#define BGP_ATTR_MAX 255
/* Path attributes discard */
bool discard_attrs[BGP_ATTR_MAX + 1];
/* Path attributes treat-as-withdraw */
bool withdraw_attrs[BGP_ATTR_MAX + 1];
/* BGP Software Version Capability */
#define BGP_MAX_SOFT_VERSION 64
char *soft_version;
/* Add-Path Best selected paths number to advertise */
uint8_t addpath_best_selected[AFI_MAX][SAFI_MAX];
/* Add-Path Paths-Limit */
struct addpath_paths_limit addpath_paths_limit[AFI_MAX][SAFI_MAX];
QOBJ_FIELDS;
};
DECLARE_QOBJ_TYPE(peer);
/* Inherit peer attribute from peer-group. */
#define PEER_ATTR_INHERIT(peer, group, attr) \
((peer)->attr = (group)->conf->attr)
#define PEER_STR_ATTR_INHERIT(peer, group, attr, mt) \
do { \
XFREE(mt, (peer)->attr); \
if ((group)->conf->attr) \
(peer)->attr = XSTRDUP(mt, (group)->conf->attr); \
else \
(peer)->attr = NULL; \
} while (0)
#define PEER_SU_ATTR_INHERIT(peer, group, attr) \
do { \
if ((peer)->attr) \
sockunion_free((peer)->attr); \
if ((group)->conf->attr) \
(peer)->attr = sockunion_dup((group)->conf->attr); \
else \
(peer)->attr = NULL; \
} while (0)
/* Check if suppress start/restart of sessions to peer. */
#define BGP_PEER_START_SUPPRESSED(P) \
(CHECK_FLAG((P)->flags, PEER_FLAG_SHUTDOWN) || \
CHECK_FLAG((P)->sflags, PEER_STATUS_PREFIX_OVERFLOW) || \
CHECK_FLAG((P)->bgp->flags, BGP_FLAG_SHUTDOWN) || \
(P)->shut_during_cfg)
#define PEER_ROUTE_ADV_DELAY(peer) \
(CHECK_FLAG(peer->thread_flags, PEER_THREAD_SUBGRP_ADV_DELAY))
#define PEER_PASSWORD_MINLEN (1)
#define PEER_PASSWORD_MAXLEN (80)
/* This structure's member directly points incoming packet data
stream. */
struct bgp_nlri {
/* AFI. */
uint16_t afi; /* iana_afi_t */
/* SAFI. */
uint8_t safi; /* iana_safi_t */
/* Length of whole NLRI. */
bgp_size_t length;
/* Pointer to NLRI byte stream. */
uint8_t *nlri;
};
/* BGP versions. */
#define BGP_VERSION_4 4
/* Default BGP port number. */
#define BGP_PORT_DEFAULT 179
/* Extended BGP Administrative Shutdown Communication */
#define BGP_ADMIN_SHUTDOWN_MSG_LEN 255
/* BGP minimum message size. */
#define BGP_MSG_OPEN_MIN_SIZE (BGP_HEADER_SIZE + 10)
#define BGP_MSG_UPDATE_MIN_SIZE (BGP_HEADER_SIZE + 4)
#define BGP_MSG_NOTIFY_MIN_SIZE (BGP_HEADER_SIZE + 2)
#define BGP_MSG_KEEPALIVE_MIN_SIZE (BGP_HEADER_SIZE + 0)
#define BGP_MSG_ROUTE_REFRESH_MIN_SIZE (BGP_HEADER_SIZE + 4)
#define BGP_MSG_CAPABILITY_MIN_SIZE (BGP_HEADER_SIZE + 3)
/* BGP message types. */
#define BGP_MSG_OPEN 1
#define BGP_MSG_UPDATE 2
#define BGP_MSG_NOTIFY 3
#define BGP_MSG_KEEPALIVE 4
#define BGP_MSG_ROUTE_REFRESH_NEW 5
#define BGP_MSG_CAPABILITY 6
#define BGP_MSG_ROUTE_REFRESH_OLD 128
/* BGP open optional parameter. */
#define BGP_OPEN_OPT_CAP 2
/* BGP4 attribute type codes. */
#define BGP_ATTR_ORIGIN 1
#define BGP_ATTR_AS_PATH 2
#define BGP_ATTR_NEXT_HOP 3
#define BGP_ATTR_MULTI_EXIT_DISC 4
#define BGP_ATTR_LOCAL_PREF 5
#define BGP_ATTR_ATOMIC_AGGREGATE 6
#define BGP_ATTR_AGGREGATOR 7
#define BGP_ATTR_COMMUNITIES 8
#define BGP_ATTR_ORIGINATOR_ID 9
#define BGP_ATTR_CLUSTER_LIST 10
#define BGP_ATTR_MP_REACH_NLRI 14
#define BGP_ATTR_MP_UNREACH_NLRI 15
#define BGP_ATTR_EXT_COMMUNITIES 16
#define BGP_ATTR_AS4_PATH 17
#define BGP_ATTR_AS4_AGGREGATOR 18
#define BGP_ATTR_PMSI_TUNNEL 22
#define BGP_ATTR_ENCAP 23
#define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
#define BGP_ATTR_AIGP 26
#define BGP_ATTR_LARGE_COMMUNITIES 32
#define BGP_ATTR_OTC 35
#define BGP_ATTR_PREFIX_SID 40
#ifdef ENABLE_BGP_VNC_ATTR
#define BGP_ATTR_VNC 255
#endif
/* BGP update origin. */
#define BGP_ORIGIN_IGP 0
#define BGP_ORIGIN_EGP 1
#define BGP_ORIGIN_INCOMPLETE 2
#define BGP_ORIGIN_UNSPECIFIED 255
/* BGP notify message codes. */
#define BGP_NOTIFY_HEADER_ERR 1
#define BGP_NOTIFY_OPEN_ERR 2
#define BGP_NOTIFY_UPDATE_ERR 3
#define BGP_NOTIFY_HOLD_ERR 4
#define BGP_NOTIFY_FSM_ERR 5
#define BGP_NOTIFY_CEASE 6
#define BGP_NOTIFY_ROUTE_REFRESH_ERR 7
#define BGP_NOTIFY_SEND_HOLD_ERR 8
/* Subcodes for BGP Finite State Machine Error */
#define BGP_NOTIFY_FSM_ERR_SUBCODE_UNSPECIFIC 0
#define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENSENT 1
#define BGP_NOTIFY_FSM_ERR_SUBCODE_OPENCONFIRM 2
#define BGP_NOTIFY_FSM_ERR_SUBCODE_ESTABLISHED 3
#define BGP_NOTIFY_SUBCODE_UNSPECIFIC 0
/* BGP_NOTIFY_HEADER_ERR sub codes. */
#define BGP_NOTIFY_HEADER_NOT_SYNC 1
#define BGP_NOTIFY_HEADER_BAD_MESLEN 2
#define BGP_NOTIFY_HEADER_BAD_MESTYPE 3
/* BGP_NOTIFY_OPEN_ERR sub codes. */
#define BGP_NOTIFY_OPEN_MALFORMED_ATTR 0
#define BGP_NOTIFY_OPEN_UNSUP_VERSION 1
#define BGP_NOTIFY_OPEN_BAD_PEER_AS 2
#define BGP_NOTIFY_OPEN_BAD_BGP_IDENT 3
#define BGP_NOTIFY_OPEN_UNSUP_PARAM 4
#define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME 6
#define BGP_NOTIFY_OPEN_UNSUP_CAPBL 7
#define BGP_NOTIFY_OPEN_ROLE_MISMATCH 11
/* BGP_NOTIFY_UPDATE_ERR sub codes. */
#define BGP_NOTIFY_UPDATE_MAL_ATTR 1
#define BGP_NOTIFY_UPDATE_UNREC_ATTR 2
#define BGP_NOTIFY_UPDATE_MISS_ATTR 3
#define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR 4
#define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR 5
#define BGP_NOTIFY_UPDATE_INVAL_ORIGIN 6
#define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP 8
#define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR 9
#define BGP_NOTIFY_UPDATE_INVAL_NETWORK 10
#define BGP_NOTIFY_UPDATE_MAL_AS_PATH 11
/* BGP_NOTIFY_CEASE sub codes (RFC 4486). */
#define BGP_NOTIFY_CEASE_MAX_PREFIX 1
#define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN 2
#define BGP_NOTIFY_CEASE_PEER_UNCONFIG 3
#define BGP_NOTIFY_CEASE_ADMIN_RESET 4
#define BGP_NOTIFY_CEASE_CONNECT_REJECT 5
#define BGP_NOTIFY_CEASE_CONFIG_CHANGE 6
#define BGP_NOTIFY_CEASE_COLLISION_RESOLUTION 7
#define BGP_NOTIFY_CEASE_OUT_OF_RESOURCE 8
#define BGP_NOTIFY_CEASE_HARD_RESET 9
#define BGP_NOTIFY_CEASE_BFD_DOWN 10
/* BGP_NOTIFY_ROUTE_REFRESH_ERR sub codes (RFC 7313). */
#define BGP_NOTIFY_ROUTE_REFRESH_INVALID_MSG_LEN 1
/* BGP route refresh optional subtypes. */
#define BGP_ROUTE_REFRESH_NORMAL 0
#define BGP_ROUTE_REFRESH_BORR 1
#define BGP_ROUTE_REFRESH_EORR 2
/* BGP timers default value. */
#define BGP_INIT_START_TIMER 1
/* The following 3 are RFC defaults that are overridden in bgp_vty.c with
* version-/profile-specific values. The values here do not matter, they only
* exist to provide a clear layering separation between core and CLI.
*/
#define BGP_DEFAULT_HOLDTIME 180
#define BGP_DEFAULT_KEEPALIVE 60
#define BGP_DEFAULT_CONNECT_RETRY 120
#define BGP_DEFAULT_EBGP_ROUTEADV 0
#define BGP_DEFAULT_IBGP_ROUTEADV 0
/* BGP RFC 4271 DelayOpenTime default value */
#define BGP_DEFAULT_DELAYOPEN 120
/* BGP default local preference. */
#define BGP_DEFAULT_LOCAL_PREF 100
/* BGP local-preference to send when 'bgp graceful-shutdown'
* is configured */
#define BGP_GSHUT_LOCAL_PREF 0
/* BGP default subgroup packet queue max . */
#define BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX 40
/* BGP graceful restart */
#define BGP_DEFAULT_RESTART_TIME 120
#define BGP_DEFAULT_STALEPATH_TIME 360
#define BGP_DEFAULT_SELECT_DEFERRAL_TIME 360
#define BGP_DEFAULT_RIB_STALE_TIME 500
#define BGP_DEFAULT_UPDATE_ADVERTISEMENT_TIME 1
/* BGP Long-lived Graceful Restart */
#define BGP_DEFAULT_LLGR_STALE_TIME 0
/* BGP uptime string length. */
#define BGP_UPTIME_LEN 25
/* Default configuration settings for bgpd. */
#define BGP_DEFAULT_CONFIG "bgpd.conf"
/* BGP Dynamic Neighbors feature */
#define BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT 100
#define BGP_DYNAMIC_NEIGHBORS_LIMIT_MIN 1
#define BGP_DYNAMIC_NEIGHBORS_LIMIT_MAX 65535
/* BGP AIGP */
#define BGP_AIGP_TLV_RESERVED 0 /* AIGP Reserved */
#define BGP_AIGP_TLV_METRIC 1 /* AIGP Metric */
#define BGP_AIGP_TLV_METRIC_LEN 11
#define BGP_AIGP_TLV_METRIC_MAX 0xffffffffffffffffULL
#define BGP_AIGP_TLV_METRIC_DESC "Accumulated IGP Metric"
/* Flag for peer_clear_soft(). */
enum bgp_clear_type {
BGP_CLEAR_SOFT_NONE,
BGP_CLEAR_SOFT_OUT,
BGP_CLEAR_SOFT_IN,
BGP_CLEAR_SOFT_BOTH,
BGP_CLEAR_SOFT_IN_ORF_PREFIX,
BGP_CLEAR_MESSAGE_STATS,
BGP_CLEAR_CAPABILITIES,
};
/* Macros. */
#define BGP_INPUT(P) ((P)->curr)
#define BGP_INPUT_PNT(P) (stream_pnt(BGP_INPUT(P)))
#define BGP_IS_VALID_STATE_FOR_NOTIF(S) \
(((S) == OpenSent) || ((S) == OpenConfirm) || ((S) == Established))
/* BGP error codes. */
enum bgp_create_error_code {
BGP_SUCCESS = 0,
BGP_CREATED = 1,
BGP_INSTANCE_EXISTS = 2,
BGP_ERR_INVALID_VALUE = -1,
BGP_ERR_INVALID_FLAG = -2,
BGP_ERR_INVALID_AS = -3,
BGP_ERR_PEER_GROUP_MEMBER = -4,
BGP_ERR_PEER_GROUP_NO_REMOTE_AS = -5,
BGP_ERR_PEER_GROUP_CANT_CHANGE = -6,
BGP_ERR_PEER_GROUP_MISMATCH = -7,
BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT = -8,
BGP_ERR_AS_MISMATCH = -9,
BGP_ERR_PEER_FLAG_CONFLICT = -10,
BGP_ERR_PEER_GROUP_SHUTDOWN = -11,
BGP_ERR_PEER_FILTER_CONFLICT = -12,
BGP_ERR_NOT_INTERNAL_PEER = -13,
BGP_ERR_REMOVE_PRIVATE_AS = -14,
BGP_ERR_AF_UNCONFIGURED = -15,
BGP_ERR_SOFT_RECONFIG_UNCONFIGURED = -16,
BGP_ERR_INSTANCE_MISMATCH = -17,
BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS = -19,
BGP_ERR_TCPSIG_FAILED = -20,
BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK = -21,
BGP_ERR_NO_IBGP_WITH_TTLHACK = -22,
BGP_ERR_NO_INTERFACE_CONFIG = -23,
BGP_ERR_AS_OVERRIDE = -25,
BGP_ERR_INVALID_DYNAMIC_NEIGHBORS_LIMIT = -26,
BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_EXISTS = -27,
BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND = -28,
BGP_ERR_INVALID_FOR_DYNAMIC_PEER = -29,
BGP_ERR_INVALID_FOR_DIRECT_PEER = -30,
BGP_ERR_PEER_SAFI_CONFLICT = -31,
/* BGP GR ERRORS */
BGP_ERR_GR_INVALID_CMD = -32,
BGP_ERR_GR_OPERATION_FAILED = -33,
BGP_GR_NO_OPERATION = -34,
/*BGP Open Policy ERRORS */
BGP_ERR_INVALID_ROLE_NAME = -35,
BGP_ERR_INVALID_INTERNAL_ROLE = -36
};
/*
* Enumeration of different policy kinds a peer can be configured with.
*/
enum bgp_policy_type {
BGP_POLICY_ROUTE_MAP,
BGP_POLICY_FILTER_LIST,
BGP_POLICY_PREFIX_LIST,
BGP_POLICY_DISTRIBUTE_LIST,
};
/* peer_flag_change_type. */
enum peer_change_type {
peer_change_none,
peer_change_reset,
peer_change_reset_in,
peer_change_reset_out,
};
/* Enumeration of martian ("self") entry types.
* Routes carrying fields that match a self entry are considered martians
* and should be handled accordingly, i.e. dropped or import-filtered.
* Note:
* These "martians" are separate from routes optionally allowed via
* 'bgp allow-martian-nexthop'. The optionally allowed martians are
* simply prefixes caught by ipv4_martian(), i.e. routes outside
* the non-reserved IPv4 Unicast address space.
*/
enum bgp_martian_type {
BGP_MARTIAN_IF_IP, /* bgp->address_hash */
BGP_MARTIAN_TUN_IP, /* bgp->tip_hash */
BGP_MARTIAN_IF_MAC, /* bgp->self_mac_hash */
BGP_MARTIAN_RMAC, /* bgp->rmac */
BGP_MARTIAN_SOO, /* bgp->evpn_info->macvrf_soo */
};
extern const struct message bgp_martian_type_str[];
extern const char *bgp_martian_type2str(enum bgp_martian_type mt);
extern struct bgp_master *bm;
extern unsigned int multipath_num;
/* Prototypes. */
extern void bgp_terminate(void);
extern void bgp_reset(void);
extern void bgp_zclient_reset(void);
extern struct bgp *bgp_get_default(void);
extern struct bgp *bgp_lookup(as_t, const char *);
extern struct bgp *bgp_lookup_by_name(const char *);
extern struct bgp *bgp_lookup_by_vrf_id(vrf_id_t);
extern struct bgp *bgp_get_evpn(void);
extern void bgp_set_evpn(struct bgp *bgp);
extern struct peer *peer_lookup(struct bgp *, union sockunion *);
extern struct peer *peer_lookup_by_conf_if(struct bgp *, const char *);
extern struct peer *peer_lookup_by_hostname(struct bgp *, const char *);
extern void bgp_peer_conf_if_to_su_update(struct peer_connection *connection);
extern int peer_group_listen_range_del(struct peer_group *, struct prefix *);
extern struct peer_group *peer_group_lookup(struct bgp *, const char *);
extern struct peer_group *peer_group_get(struct bgp *, const char *);
extern struct peer *peer_create_bind_dynamic_neighbor(struct bgp *,
union sockunion *,
struct peer_group *);
extern struct prefix *
peer_group_lookup_dynamic_neighbor_range(struct peer_group *, struct prefix *);
extern struct peer_group *peer_group_lookup_dynamic_neighbor(struct bgp *,
struct prefix *,
struct prefix **);
extern struct peer *peer_lookup_dynamic_neighbor(struct bgp *,
union sockunion *);
/*
* Peers are incredibly easy to memory leak
* due to the various ways that they are actually used
* Provide some functionality to debug locks and unlocks
*/
extern struct peer *peer_lock_with_caller(const char *, struct peer *);
extern struct peer *peer_unlock_with_caller(const char *, struct peer *);
#define peer_unlock(A) peer_unlock_with_caller(__FUNCTION__, (A))
#define peer_lock(B) peer_lock_with_caller(__FUNCTION__, (B))
extern enum bgp_peer_sort peer_sort(struct peer *peer);
extern enum bgp_peer_sort peer_sort_lookup(struct peer *peer);
extern bool peer_active(struct peer *);
extern bool peer_active_nego(struct peer *);
extern bool peer_afc_received(struct peer *peer);
extern bool peer_afc_advertised(struct peer *peer);
extern void bgp_recalculate_all_bestpaths(struct bgp *bgp);
extern struct peer *peer_create(union sockunion *su, const char *conf_if,
struct bgp *bgp, as_t local_as, as_t remote_as,
enum peer_asn_type as_type,
struct peer_group *group, bool config_node,
const char *as_str);
extern struct peer *peer_create_accept(struct bgp *);
extern void peer_xfer_config(struct peer *dst, struct peer *src);
extern char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
json_object *json);
extern int bgp_config_write(struct vty *);
extern void bgp_master_init(struct event_loop *master, const int buffer_size,
struct list *addresses);
extern void bgp_init(unsigned short instance);
extern void bgp_pthreads_run(void);
extern void bgp_pthreads_finish(void);
extern void bgp_route_map_init(void);
extern void bgp_session_reset(struct peer *);
extern int bgp_option_set(int);
extern int bgp_option_unset(int);
extern int bgp_option_check(int);
/* set the bgp no-rib option during runtime and remove installed routes */
extern void bgp_option_norib_set_runtime(void);
/* unset the bgp no-rib option during runtime and reset all peers */
extern void bgp_option_norib_unset_runtime(void);
extern int bgp_get(struct bgp **bgp, as_t *as, const char *name,
enum bgp_instance_type kind, const char *as_pretty,
enum asnotation_mode asnotation);
extern void bgp_instance_up(struct bgp *);
extern void bgp_instance_down(struct bgp *);
extern int bgp_delete(struct bgp *);
extern int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf,
vrf_id_t old_vrf_id, bool create);
extern void bgp_router_id_zebra_bump(vrf_id_t, const struct prefix *);
extern void bgp_router_id_static_set(struct bgp *, struct in_addr);
extern void bm_wait_for_fib_set(bool set);
extern void bgp_suppress_fib_pending_set(struct bgp *bgp, bool set);
extern void bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id);
extern void bgp_cluster_id_unset(struct bgp *bgp);
extern void bgp_confederation_id_set(struct bgp *bgp, as_t as,
const char *as_str);
extern void bgp_confederation_id_unset(struct bgp *bgp);
extern bool bgp_confederation_peers_check(struct bgp *, as_t);
extern void bgp_confederation_peers_add(struct bgp *bgp, as_t as,
const char *as_str);
extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
extern void bgp_timers_set(struct vty *vty, struct bgp *, uint32_t keepalive,
uint32_t holdtime, uint32_t connect_retry,
uint32_t delayopen);
extern void bgp_timers_unset(struct bgp *);
extern void bgp_default_local_preference_set(struct bgp *bgp,
uint32_t local_pref);
extern void bgp_default_local_preference_unset(struct bgp *bgp);
extern void bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp,
uint32_t queue_size);
extern void bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp);
extern void bgp_listen_limit_set(struct bgp *bgp, int listen_limit);
extern void bgp_listen_limit_unset(struct bgp *bgp);
extern bool bgp_update_delay_active(struct bgp *);
extern bool bgp_update_delay_configured(struct bgp *);
extern bool bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi);
extern void peer_as_change(struct peer *peer, as_t as,
enum peer_asn_type as_type, const char *as_str);
extern int peer_remote_as(struct bgp *bgp, union sockunion *su,
const char *conf_if, as_t *as,
enum peer_asn_type as_type, const char *as_str);
extern int peer_group_remote_as(struct bgp *bgp, const char *peer_str, as_t *as,
enum peer_asn_type as_type, const char *as_str);
extern int peer_delete(struct peer *peer);
extern void peer_notify_unconfig(struct peer *peer);
extern int peer_group_delete(struct peer_group *);
extern int peer_group_remote_as_delete(struct peer_group *);
extern int peer_group_listen_range_add(struct peer_group *, struct prefix *);
extern void peer_group_notify_unconfig(struct peer_group *group);
extern int peer_activate(struct peer *, afi_t, safi_t);
extern int peer_deactivate(struct peer *, afi_t, safi_t);
extern int peer_group_bind(struct bgp *, union sockunion *, struct peer *,
struct peer_group *, as_t *);
extern int peer_flag_set(struct peer *peer, uint64_t flag);
extern int peer_flag_unset(struct peer *peer, uint64_t flag);
extern void peer_flag_inherit(struct peer *peer, uint64_t flag);
extern int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi,
uint64_t flag);
extern int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi,
uint64_t flag);
extern bool peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi,
uint64_t flag);
extern void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
uint64_t flag);
extern void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
enum peer_change_type type);
extern int peer_ebgp_multihop_set(struct peer *, int);
extern int peer_ebgp_multihop_unset(struct peer *);
extern int is_ebgp_multihop_configured(struct peer *peer);
extern int peer_role_set(struct peer *peer, uint8_t role, bool strict_mode);
extern int peer_role_unset(struct peer *peer);
extern void peer_description_set(struct peer *, const char *);
extern void peer_description_unset(struct peer *);
extern int peer_update_source_if_set(struct peer *, const char *);
extern void peer_update_source_addr_set(struct peer *peer,
const union sockunion *su);
extern void peer_update_source_unset(struct peer *peer);
extern int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
const char *rmap,
struct route_map *route_map);
extern int peer_default_originate_unset(struct peer *, afi_t, safi_t);
extern void bgp_tcp_keepalive_set(struct bgp *bgp, uint16_t idle,
uint16_t interval, uint16_t probes);
extern void bgp_tcp_keepalive_unset(struct bgp *bgp);
extern void peer_port_set(struct peer *, uint16_t);
extern void peer_port_unset(struct peer *);
extern int peer_weight_set(struct peer *, afi_t, safi_t, uint16_t);
extern int peer_weight_unset(struct peer *, afi_t, safi_t);
extern int peer_timers_set(struct peer *, uint32_t keepalive,
uint32_t holdtime);
extern int peer_timers_unset(struct peer *);
extern int peer_timers_connect_set(struct peer *, uint32_t);
extern int peer_timers_connect_unset(struct peer *);
extern int peer_advertise_interval_set(struct peer *, uint32_t);
extern int peer_advertise_interval_unset(struct peer *);
extern int peer_timers_delayopen_set(struct peer *peer, uint32_t delayopen);
extern int peer_timers_delayopen_unset(struct peer *peer);
extern void peer_interface_set(struct peer *, const char *);
extern void peer_interface_unset(struct peer *);
extern int peer_distribute_set(struct peer *, afi_t, safi_t, int, const char *);
extern int peer_distribute_unset(struct peer *, afi_t, safi_t, int);
extern int peer_allowas_in_set(struct peer *, afi_t, safi_t, int, int);
extern int peer_allowas_in_unset(struct peer *, afi_t, safi_t);
extern int peer_local_as_set(struct peer *peer, as_t as, bool no_prepend,
bool replace_as, bool dual_as, const char *as_str);
extern int peer_local_as_unset(struct peer *);
extern int peer_prefix_list_set(struct peer *, afi_t, safi_t, int,
const char *);
extern int peer_prefix_list_unset(struct peer *, afi_t, safi_t, int);
extern int peer_aslist_set(struct peer *, afi_t, safi_t, int, const char *);
extern int peer_aslist_unset(struct peer *, afi_t, safi_t, int);
extern int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int,
const char *name, struct route_map *route_map);
extern int peer_route_map_unset(struct peer *, afi_t, safi_t, int);
extern int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
const char *name,
struct route_map *route_map);
extern int peer_advertise_map_set(struct peer *peer, afi_t afi, safi_t safi,
const char *advertise_name,
struct route_map *advertise_map,
const char *condition_name,
struct route_map *condition_map,
bool condition);
extern int peer_password_set(struct peer *, const char *);
extern int peer_password_unset(struct peer *);
extern int peer_unsuppress_map_unset(struct peer *, afi_t, safi_t);
extern int peer_advertise_map_unset(struct peer *peer, afi_t afi, safi_t safi,
const char *advertise_name,
struct route_map *advertise_map,
const char *condition_name,
struct route_map *condition_map,
bool condition);
extern int peer_maximum_prefix_set(struct peer *, afi_t, safi_t, uint32_t,
uint8_t, int, uint16_t, bool force);
extern int peer_maximum_prefix_unset(struct peer *, afi_t, safi_t);
extern void peer_maximum_prefix_out_refresh_routes(struct peer *peer, afi_t afi,
safi_t safi);
extern int peer_maximum_prefix_out_set(struct peer *peer, afi_t afi,
safi_t safi, uint32_t max);
extern int peer_maximum_prefix_out_unset(struct peer *peer, afi_t afi,
safi_t safi);
extern int peer_clear(struct peer *, struct listnode **);
extern int peer_clear_soft(struct peer *, afi_t, safi_t, enum bgp_clear_type);
extern int peer_ttl_security_hops_set(struct peer *, int);
extern int peer_ttl_security_hops_unset(struct peer *);
extern void peer_tx_shutdown_message_set(struct peer *, const char *msg);
extern void peer_tx_shutdown_message_unset(struct peer *);
extern void bgp_route_map_update_timer(struct event *thread);
extern const char *bgp_get_name_by_role(uint8_t role);
extern enum asnotation_mode bgp_get_asnotation(struct bgp *bgp);
extern void bgp_route_map_terminate(void);
extern bool bgp_route_map_has_extcommunity_rt(const struct route_map *map);
extern int peer_cmp(struct peer *p1, struct peer *p2);
extern int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
afi_t *afi, safi_t *safi);
extern int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi,
iana_afi_t *pkt_afi,
iana_safi_t *pkt_safi);
extern struct peer_af *peer_af_create(struct peer *, afi_t, safi_t);
extern struct peer_af *peer_af_find(struct peer *, afi_t, safi_t);
extern int peer_af_delete(struct peer *, afi_t, safi_t);
extern void bgp_shutdown_enable(struct bgp *bgp, const char *msg);
extern void bgp_shutdown_disable(struct bgp *bgp);
extern void bgp_close(void);
extern void bgp_free(struct bgp *);
void bgp_gr_apply_running_config(void);
/* BGP GR */
int bgp_global_gr_init(struct bgp *bgp);
int bgp_peer_gr_init(struct peer *peer);
#define BGP_GR_ROUTER_DETECT_AND_SEND_CAPABILITY_TO_ZEBRA(_bgp, _peer_list) \
do { \
struct peer *peer_loop; \
bool gr_router_detected = false; \
struct listnode *node = {0}; \
for (ALL_LIST_ELEMENTS_RO(_peer_list, node, peer_loop)) { \
if (CHECK_FLAG(peer_loop->flags, \
PEER_FLAG_GRACEFUL_RESTART)) \
gr_router_detected = true; \
} \
if (gr_router_detected \
&& _bgp->present_zebra_gr_state == ZEBRA_GR_DISABLE) { \
bgp_zebra_send_capabilities(_bgp, false); \
} else if (!gr_router_detected \
&& _bgp->present_zebra_gr_state \
== ZEBRA_GR_ENABLE) { \
bgp_zebra_send_capabilities(_bgp, true); \
} \
} while (0)
static inline struct bgp *bgp_lock(struct bgp *bgp)
{
bgp->lock++;
return bgp;
}
static inline void bgp_unlock(struct bgp *bgp)
{
assert(bgp->lock > 0);
if (--bgp->lock == 0)
bgp_free(bgp);
}
static inline int afindex(afi_t afi, safi_t safi)
{
switch (afi) {
case AFI_IP:
switch (safi) {
case SAFI_UNICAST:
return BGP_AF_IPV4_UNICAST;
case SAFI_MULTICAST:
return BGP_AF_IPV4_MULTICAST;
case SAFI_LABELED_UNICAST:
return BGP_AF_IPV4_LBL_UNICAST;
case SAFI_MPLS_VPN:
return BGP_AF_IPV4_VPN;
case SAFI_ENCAP:
return BGP_AF_IPV4_ENCAP;
case SAFI_FLOWSPEC:
return BGP_AF_IPV4_FLOWSPEC;
case SAFI_EVPN:
case SAFI_UNSPEC:
case SAFI_MAX:
return BGP_AF_MAX;
}
break;
case AFI_IP6:
switch (safi) {
case SAFI_UNICAST:
return BGP_AF_IPV6_UNICAST;
case SAFI_MULTICAST:
return BGP_AF_IPV6_MULTICAST;
case SAFI_LABELED_UNICAST:
return BGP_AF_IPV6_LBL_UNICAST;
case SAFI_MPLS_VPN:
return BGP_AF_IPV6_VPN;
case SAFI_ENCAP:
return BGP_AF_IPV6_ENCAP;
case SAFI_FLOWSPEC:
return BGP_AF_IPV6_FLOWSPEC;
case SAFI_EVPN:
case SAFI_UNSPEC:
case SAFI_MAX:
return BGP_AF_MAX;
}
break;
case AFI_L2VPN:
switch (safi) {
case SAFI_EVPN:
return BGP_AF_L2VPN_EVPN;
case SAFI_UNICAST:
case SAFI_MULTICAST:
case SAFI_LABELED_UNICAST:
case SAFI_MPLS_VPN:
case SAFI_ENCAP:
case SAFI_FLOWSPEC:
case SAFI_UNSPEC:
case SAFI_MAX:
return BGP_AF_MAX;
}
break;
case AFI_UNSPEC:
case AFI_MAX:
return BGP_AF_MAX;
}
assert(!"Reached end of function we should never hit");
}
/* If the peer is not a peer-group but is bound to a peer-group return 1 */
static inline int peer_group_active(struct peer *peer)
{
if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP) && peer->group)
return 1;
return 0;
}
/* If peer is negotiated at least one address family return 1. */
static inline int peer_afi_active_nego(const struct peer *peer, afi_t afi)
{
if (peer->afc_nego[afi][SAFI_UNICAST]
|| peer->afc_nego[afi][SAFI_MULTICAST]
|| peer->afc_nego[afi][SAFI_LABELED_UNICAST]
|| peer->afc_nego[afi][SAFI_MPLS_VPN]
|| peer->afc_nego[afi][SAFI_ENCAP]
|| peer->afc_nego[afi][SAFI_FLOWSPEC]
|| peer->afc_nego[afi][SAFI_EVPN])
return 1;
return 0;
}
/* If at least one address family activated for group, return 1. */
static inline int peer_group_af_configured(struct peer_group *group)
{
struct peer *peer = group->conf;
if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
|| peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
|| peer->afc[AFI_IP][SAFI_FLOWSPEC]
|| peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
|| peer->afc[AFI_IP6][SAFI_UNICAST]
|| peer->afc[AFI_IP6][SAFI_MULTICAST]
|| peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
|| peer->afc[AFI_IP6][SAFI_MPLS_VPN]
|| peer->afc[AFI_IP6][SAFI_ENCAP]
|| peer->afc[AFI_IP6][SAFI_FLOWSPEC]
|| peer->afc[AFI_L2VPN][SAFI_EVPN])
return 1;
return 0;
}
static inline char *timestamp_string(time_t ts, char *timebuf)
{
time_t tbuf;
tbuf = time(NULL) - (monotime(NULL) - ts);
return ctime_r(&tbuf, timebuf);
}
static inline bool peer_established(struct peer_connection *connection)
{
return connection->status == Established;
}
static inline bool peer_dynamic_neighbor(struct peer *peer)
{
return CHECK_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
}
static inline bool peer_dynamic_neighbor_no_nsf(struct peer *peer)
{
return (peer_dynamic_neighbor(peer) &&
!CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT));
}
static inline int peer_cap_enhe(struct peer *peer, afi_t afi, safi_t safi)
{
return (CHECK_FLAG(peer->af_cap[afi][safi], PEER_CAP_ENHE_AF_NEGO));
}
/* Lookup VRF for BGP instance based on its type. */
static inline struct vrf *bgp_vrf_lookup_by_instance_type(struct bgp *bgp)
{
struct vrf *vrf;
if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
vrf = vrf_lookup_by_id(VRF_DEFAULT);
else if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
vrf = vrf_lookup_by_name(bgp->name);
else
vrf = NULL;
return vrf;
}
static inline uint32_t bgp_vrf_interfaces(struct bgp *bgp, bool active)
{
struct vrf *vrf;
struct interface *ifp;
uint32_t count = 0;
/* if there is one interface in the vrf which is up then it is deemed
* active
*/
vrf = bgp_vrf_lookup_by_instance_type(bgp);
if (vrf == NULL)
return 0;
RB_FOREACH (ifp, if_name_head, &vrf->ifaces_by_name) {
if (strcmp(ifp->name, bgp->name) == 0)
continue;
if (!active || if_is_up(ifp))
count++;
}
return count;
}
/* Link BGP instance to VRF. */
static inline void bgp_vrf_link(struct bgp *bgp, struct vrf *vrf)
{
bgp->vrf_id = vrf->vrf_id;
if (vrf->info != (void *)bgp)
vrf->info = (void *)bgp_lock(bgp);
}
/* Unlink BGP instance from VRF. */
static inline void bgp_vrf_unlink(struct bgp *bgp, struct vrf *vrf)
{
if (vrf->info == (void *)bgp) {
vrf->info = NULL;
bgp_unlock(bgp);
}
bgp->vrf_id = VRF_UNKNOWN;
}
static inline bool bgp_in_graceful_shutdown(struct bgp *bgp)
{
/* True if either set for this instance or globally */
return (!!CHECK_FLAG(bgp->flags, BGP_FLAG_GRACEFUL_SHUTDOWN) ||
!!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_SHUTDOWN));
}
static inline bool bgp_in_graceful_restart(void)
{
/* True if BGP has (re)started gracefully (based on flags
* noted at startup) and GR is not complete.
*/
return (CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_RESTART) &&
!CHECK_FLAG(bm->flags, BM_FLAG_GR_COMPLETE));
}
static inline bool bgp_is_graceful_restart_complete(void)
{
/* True if BGP has (re)started gracefully (based on flags
* noted at startup) and GR is marked as complete.
*/
return (CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_RESTART) &&
CHECK_FLAG(bm->flags, BM_FLAG_GR_COMPLETE));
}
static inline void bgp_update_gr_completion(void)
{
struct listnode *node, *nnode;
struct bgp *bgp;
/*
* Check and mark GR complete. This is done when deferred
* path selection has been completed for all instances and
* route-advertisement/EOR and route-sync with zebra has
* been invoked.
*/
if (!CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_RESTART) ||
CHECK_FLAG(bm->flags, BM_FLAG_GR_COMPLETE))
return;
for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
if (bgp->gr_route_sync_pending)
return;
}
SET_FLAG(bm->flags, BM_FLAG_GR_COMPLETE);
bm->gr_completion_time = monotime(NULL);
}
static inline bool bgp_gr_is_forwarding_preserved(struct bgp *bgp)
{
/*
* Is forwarding state preserved? Based either on config
* or if BGP restarted gracefully.
* TBD: Additional AFI/SAFI based checks etc.
*/
return (CHECK_FLAG(bm->flags, BM_FLAG_GRACEFUL_RESTART) ||
CHECK_FLAG(bgp->flags, BGP_FLAG_GR_PRESERVE_FWD));
}
/* For benefit of rfapi */
extern struct peer *peer_new(struct bgp *bgp);
extern struct peer *peer_lookup_in_view(struct vty *vty, struct bgp *bgp,
const char *ip_str, bool use_json);
extern int bgp_lookup_by_as_name_type(struct bgp **bgp_val, as_t *as,
const char *as_pretty,
enum asnotation_mode asnotation,
const char *name,
enum bgp_instance_type inst_type);
/* Hooks */
DECLARE_HOOK(bgp_vrf_status_changed, (struct bgp *bgp, struct interface *ifp),
(bgp, ifp));
DECLARE_HOOK(peer_status_changed, (struct peer *peer), (peer));
DECLARE_HOOK(bgp_snmp_init_stats, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_snmp_update_last_changed, (struct bgp *bgp), (bgp));
DECLARE_HOOK(bgp_snmp_update_stats,
(struct bgp_dest *rn, struct bgp_path_info *pi, bool added),
(rn, pi, added));
DECLARE_HOOK(bgp_rpki_prefix_status,
(struct peer * peer, struct attr *attr,
const struct prefix *prefix),
(peer, attr, prefix));
void peer_nsf_stop(struct peer *peer);
void peer_tcp_mss_set(struct peer *peer, uint32_t tcp_mss);
void peer_tcp_mss_unset(struct peer *peer);
extern void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
safi_t safi);
extern void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
int outbound);
extern bool bgp_path_attribute_discard(struct peer *peer, char *buf,
size_t size);
extern bool bgp_path_attribute_treat_as_withdraw(struct peer *peer, char *buf,
size_t size);
extern void srv6_function_free(struct bgp_srv6_function *func);
extern void bgp_session_reset_safe(struct peer *peer, struct listnode **nnode);
#ifdef _FRR_ATTRIBUTE_PRINTFRR
/* clang-format off */
#pragma FRR printfrr_ext "%pBP" (struct peer *)
/* clang-format on */
#endif
/* Macro to check if default bgp instance is hidden */
#define IS_BGP_INSTANCE_HIDDEN(_bgp) \
(CHECK_FLAG(_bgp->flags, BGP_FLAG_INSTANCE_HIDDEN) && \
(_bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT || \
_bgp->inst_type == BGP_INSTANCE_TYPE_VRF))
/* Macro to check if bgp instance delete in-progress and !hidden */
#define BGP_INSTANCE_HIDDEN_DELETE_IN_PROGRESS(_bgp, _afi, _safi) \
(CHECK_FLAG(_bgp->flags, BGP_FLAG_DELETE_IN_PROGRESS) && \
!IS_BGP_INSTANCE_HIDDEN(_bgp) && \
!(_afi == AFI_IP && _safi == SAFI_MPLS_VPN) && \
!(_afi == AFI_IP6 && _safi == SAFI_MPLS_VPN))
#endif /* _QUAGGA_BGPD_H */
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