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+/* BGP message definition header.
+ * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#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"
+
+/* 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 "lib/bfd.h"
+
+#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 { AS_UNSPECIFIED = 0,
+ AS_SPECIFIED,
+ AS_INTERNAL,
+ AS_EXTERNAL,
+};
+
+/* Zebra Gracaful Restart states */
+enum zebra_gr_mode {
+ ZEBRA_GR_DISABLE = 0,
+ ZEBRA_GR_ENABLE
+};
+
+/* Typedef BGP specific types. */
+typedef uint32_t as_t;
+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 thread_master *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)
+
+ uint64_t updgrp_idspace;
+ uint64_t subgrp_idspace;
+
+ /* timer to dampen route map changes */
+ struct thread *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)
+
+ bool terminating; /* global flag that sigint terminate seen */
+
+ /* DSCP value for TCP sessions */
+ uint8_t tcp_dscp;
+
+ 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;
+ 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)
+
+ /*
+ * 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 in6_addr *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 thread *t_select_deferral;
+ /* Routes Deferred */
+ uint32_t gr_deferred;
+ /* Best route select */
+ struct thread *t_route_select;
+ /* AFI, SAFI enabled */
+ bool af_enabled[AFI_MAX][SAFI_MAX];
+ /* Route update completed */
+ bool route_sync[AFI_MAX][SAFI_MAX];
+};
+
+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];
+};
+
+/* BGP instance structure. */
+struct bgp {
+ /* AS number of this BGP instance. */
+ as_t as;
+
+ /* 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)
+
+ /* 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;
+ as_t *confed_peers;
+ int confed_peers_cnt;
+
+ struct thread
+ *t_startup; /* start-up timer on only once at the beginning */
+
+ 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 */
+ struct thread
+ *t_maxmed_onstartup; /* non-null when max-med onstartup is on */
+ 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 thread *t_update_delay;
+ struct thread *t_establish_wait;
+ 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_DEF 0
+#define BGP_UPDATE_DELAY_MIN 0
+#define BGP_UPDATE_DELAY_MAX 3600
+
+ /* 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
+ */
+ uint32_t lb_ref_bw;
+#define BGP_LINK_BW_REF_BW 1
+
+ /* BGP flags. */
+ uint64_t flags;
+#define BGP_FLAG_ALWAYS_COMPARE_MED (1 << 0)
+#define BGP_FLAG_DETERMINISTIC_MED (1 << 1)
+#define BGP_FLAG_MED_MISSING_AS_WORST (1 << 2)
+#define BGP_FLAG_MED_CONFED (1 << 3)
+#define BGP_FLAG_NO_CLIENT_TO_CLIENT (1 << 4)
+#define BGP_FLAG_COMPARE_ROUTER_ID (1 << 5)
+#define BGP_FLAG_ASPATH_IGNORE (1 << 6)
+#define BGP_FLAG_IMPORT_CHECK (1 << 7)
+#define BGP_FLAG_NO_FAST_EXT_FAILOVER (1 << 8)
+#define BGP_FLAG_LOG_NEIGHBOR_CHANGES (1 << 9)
+
+/* This flag is set when we have full BGP Graceful-Restart mode enable */
+#define BGP_FLAG_GRACEFUL_RESTART (1 << 10)
+
+#define BGP_FLAG_ASPATH_CONFED (1 << 11)
+#define BGP_FLAG_ASPATH_MULTIPATH_RELAX (1 << 12)
+#define BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY (1 << 13)
+#define BGP_FLAG_DISABLE_NH_CONNECTED_CHK (1 << 14)
+#define BGP_FLAG_MULTIPATH_RELAX_AS_SET (1 << 15)
+#define BGP_FLAG_FORCE_STATIC_PROCESS (1 << 16)
+#define BGP_FLAG_SHOW_HOSTNAME (1 << 17)
+#define BGP_FLAG_GR_PRESERVE_FWD (1 << 18)
+#define BGP_FLAG_GRACEFUL_SHUTDOWN (1 << 19)
+#define BGP_FLAG_DELETE_IN_PROGRESS (1 << 20)
+#define BGP_FLAG_SELECT_DEFER_DISABLE (1 << 21)
+#define BGP_FLAG_GR_DISABLE_EOR (1 << 22)
+#define BGP_FLAG_EBGP_REQUIRES_POLICY (1 << 23)
+#define BGP_FLAG_SHOW_NEXTHOP_HOSTNAME (1 << 24)
+
+/* This flag is set if the instance is in administrative shutdown */
+#define BGP_FLAG_SHUTDOWN (1 << 25)
+#define BGP_FLAG_SUPPRESS_FIB_PENDING (1 << 26)
+#define BGP_FLAG_SUPPRESS_DUPLICATES (1 << 27)
+#define BGP_FLAG_PEERTYPE_MULTIPATH_RELAX (1 << 29)
+/* Indicate Graceful Restart support for BGP NOTIFICATION messages */
+#define BGP_FLAG_GRACEFUL_NOTIFICATION (1 << 30)
+/* Send Hard Reset CEASE Notification for 'Administrative Reset' */
+#define BGP_FLAG_HARD_ADMIN_RESET (1 << 31)
+
+ /* 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;
+
+ /* 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];
+
+ /* 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 thread *t_rmap_def_originate_eval;
+#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_RD_CFGD (1 << 3)
+#define BGP_VRF_L3VNI_PREFIX_ROUTES_ONLY (1 << 4)
+
+ /* 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;
+
+ /* 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 thread *t_condition_check;
+
+ /* BGP VPN SRv6 backend */
+ bool srv6_enabled;
+ char srv6_locator_name[SRV6_LOCNAME_SIZE];
+ struct list *srv6_locator_chunks;
+ struct list *srv6_functions;
+
+ struct timeval ebgprequirespolicywarning;
+#define FIFTEENMINUTE2USEC (int64_t)15 * 60 * 1000000
+
+ bool allow_martian;
+
+ QOBJ_FIELDS;
+};
+DECLARE_QOBJ_TYPE(bgp);
+
+struct bgp_interface {
+#define BGP_INTERFACE_MPLS_BGP_FORWARDING (1 << 0)
+ 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_config_end, (struct bgp *bgp), (bgp));
+
+/* 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;
+ char *data;
+ bgp_size_t length;
+ uint8_t *raw_data;
+ bool hard_reset;
+};
+
+/* 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 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 thread *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 *, int, int);
+
+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;
+};
+
+/* 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;
+ uint64_t version[AFI_MAX][SAFI_MAX];
+
+ /* BGP peer_af structures, per configured AF on this peer */
+ struct peer_af *peer_af_array[BGP_AF_MAX];
+
+ /* Peer's remote AS number. */
+ int as_type;
+ as_t as;
+
+ /* Peer's local AS number. */
+ as_t local_as;
+
+ enum bgp_peer_sort sort;
+
+ /* Peer's Change local AS number. */
+ as_t change_local_as;
+
+ /* Remote router ID. */
+ struct in_addr remote_id;
+
+ /* Local router ID. */
+ struct in_addr local_id;
+
+ /* 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
+
+ /* used as a block to deposit raw wire data to */
+ uint8_t ibuf_scratch[BGP_EXTENDED_MESSAGE_MAX_PACKET_SIZE
+ * BGP_READ_PACKET_MAX];
+ struct ringbuf *ibuf_work; // WiP buffer used by bgp_read() only
+ struct stream *obuf_work; // WiP buffer used to construct packets
+
+ struct stream *curr; // the current packet being parsed
+
+ /* We use a separate stream to encode MP_REACH_NLRI for efficient
+ * NLRI packing. peer->obuf_work stores all the other attributes. The
+ * actual packet is then constructed by concatenating the two.
+ */
+ struct stream *scratch;
+
+ /* the doppelganger peer structure, due to dual TCP conn setup */
+ struct peer *doppelganger;
+
+ /* Status of the peer. */
+ enum bgp_fsm_status status;
+ enum bgp_fsm_status ostatus;
+
+ /* 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 */
+ int fd; /* File descriptor */
+ 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. */
+ union sockunion su; /* Sockunion address of the peer. */
+#define BGP_PEER_SU_UNSPEC(peer) (peer->su.sa.sa_family == AF_UNSPEC)
+ 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) */
+ uint32_t cap;
+#define PEER_CAP_REFRESH_ADV (1U << 0) /* refresh advertised */
+#define PEER_CAP_REFRESH_OLD_RCV (1U << 1) /* refresh old received */
+#define PEER_CAP_REFRESH_NEW_RCV (1U << 2) /* refresh rfc received */
+#define PEER_CAP_DYNAMIC_ADV (1U << 3) /* dynamic advertised */
+#define PEER_CAP_DYNAMIC_RCV (1U << 4) /* dynamic received */
+#define PEER_CAP_RESTART_ADV (1U << 5) /* restart advertised */
+#define PEER_CAP_RESTART_RCV (1U << 6) /* restart received */
+#define PEER_CAP_AS4_ADV (1U << 7) /* as4 advertised */
+#define PEER_CAP_AS4_RCV (1U << 8) /* as4 received */
+/* sent graceful-restart restart (R) bit */
+#define PEER_CAP_GRACEFUL_RESTART_R_BIT_ADV (1U << 9)
+/* received graceful-restart restart (R) bit */
+#define PEER_CAP_GRACEFUL_RESTART_R_BIT_RCV (1U << 10)
+#define PEER_CAP_ADDPATH_ADV (1U << 11) /* addpath advertised */
+#define PEER_CAP_ADDPATH_RCV (1U << 12) /* addpath received */
+#define PEER_CAP_ENHE_ADV (1U << 13) /* Extended nexthop advertised */
+#define PEER_CAP_ENHE_RCV (1U << 14) /* Extended nexthop received */
+#define PEER_CAP_HOSTNAME_ADV (1U << 15) /* hostname advertised */
+#define PEER_CAP_HOSTNAME_RCV (1U << 16) /* hostname received */
+#define PEER_CAP_ENHANCED_RR_ADV (1U << 17) /* enhanced rr advertised */
+#define PEER_CAP_ENHANCED_RR_RCV (1U << 18) /* enhanced rr received */
+#define PEER_CAP_EXTENDED_MESSAGE_ADV (1U << 19)
+#define PEER_CAP_EXTENDED_MESSAGE_RCV (1U << 20)
+#define PEER_CAP_LLGR_ADV (1U << 21)
+#define PEER_CAP_LLGR_RCV (1U << 22)
+/* sent graceful-restart notification (N) bit */
+#define PEER_CAP_GRACEFUL_RESTART_N_BIT_ADV (1U << 23)
+/* received graceful-restart notification (N) bit */
+#define PEER_CAP_GRACEFUL_RESTART_N_BIT_RCV (1U << 24)
+#define PEER_CAP_ROLE_ADV (1U << 25) /* role advertised */
+#define PEER_CAP_ROLE_RCV (1U << 26) /* role received */
+
+ /* 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_ORF_PREFIX_SM_OLD_RCV (1U << 4) /* send-mode received */
+#define PEER_CAP_ORF_PREFIX_RM_OLD_RCV (1U << 5) /* 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)
+
+ /* 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.
+ */
+ uint32_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.
+ */
+ uint32_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.
+ */
+ 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)
+
+ /*
+ *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 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 << 24)
+#define PEER_FLAG_ALLOWAS_IN_ORIGIN (1ULL << 25)
+#define PEER_FLAG_SEND_LARGE_COMMUNITY (1ULL << 26)
+#define PEER_FLAG_MAX_PREFIX_OUT (1ULL << 27)
+#define PEER_FLAG_MAX_PREFIX_FORCE (1ULL << 28)
+#define PEER_FLAG_DISABLE_ADDPATH_RX (1ULL << 29)
+#define PEER_FLAG_SOO (1ULL << 30)
+
+ 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 */
+
+ /* 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 thread *t_read;
+ struct thread *t_write;
+ struct thread *t_start;
+ struct thread *t_connect_check_r;
+ struct thread *t_connect_check_w;
+ struct thread *t_connect;
+ struct thread *t_holdtime;
+ struct thread *t_routeadv;
+ struct thread *t_delayopen;
+ struct thread *t_pmax_restart;
+ struct thread *t_gr_restart;
+ struct thread *t_gr_stale;
+ struct thread *t_llgr_stale[AFI_MAX][SAFI_MAX];
+ struct thread *t_generate_updgrp_packets;
+ struct thread *t_process_packet;
+ struct thread *t_process_packet_error;
+ struct thread *t_refresh_stalepath;
+
+ /* Thread flags. */
+ _Atomic uint32_t thread_flags;
+#define PEER_THREAD_WRITES_ON (1U << 0)
+#define PEER_THREAD_READS_ON (1U << 1)
+#define PEER_THREAD_KEEPALIVES_ON (1U << 2)
+#define PEER_THREAD_SUBGRP_ADV_DELAY (1U << 3)
+
+ /* 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 */
+
+ /* 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 */
+
+ /* Syncronization list and time. */
+ struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
+ 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 */
+ /*
+ * Remember to update peer_down_str in bgp_fsm.c when you add
+ * a new value to the last_reset reason
+ */
+
+ uint16_t last_reset_cause_size;
+ uint8_t last_reset_cause[BGP_MAX_PACKET_SIZE];
+
+ /* The kind of route-map Flags.*/
+ uint16_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_NOSET (1U << 5) /* not allow to set commands */
+#define PEER_RMAP_TYPE_IMPORT (1U << 6) /* neighbor route-map import */
+#define PEER_RMAP_TYPE_EXPORT (1U << 7) /* neighbor route-map export */
+#define PEER_RMAP_TYPE_AGGREGATE (1U << 8) /* 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;
+
+ /* Sender side AS path loop detection. */
+ bool as_path_loop_detection;
+
+ /* 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;
+
+ 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 */
+
+ /* Pointer to NLRI byte stream. */
+ uint8_t *nlri;
+
+ /* Length of whole NLRI. */
+ bgp_size_t length;
+};
+
+/* 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_AUTH 1
+#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_AS_PATHLIMIT 21
+#define BGP_ATTR_PMSI_TUNNEL 22
+#define BGP_ATTR_ENCAP 23
+#define BGP_ATTR_IPV6_EXT_COMMUNITIES 25
+#define BGP_ATTR_LARGE_COMMUNITIES 32
+#define BGP_ATTR_OTC 35
+#define BGP_ATTR_PREFIX_SID 40
+#define BGP_ATTR_SRTE_COLOR 51
+#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
+
+/* 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_AUTH_FAILURE 5
+#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_AS_ROUTE_LOOP 7
+#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_VTY_PORT 2605
+#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
+
+/* 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
+};
+
+/* 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_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_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP = -18,
+ 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_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS = -24,
+ 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,
+};
+
+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 *);
+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 *, const char *, struct bgp *,
+ as_t, as_t, int, struct peer_group *);
+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 thread_master *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 **, as_t *, const char *, enum bgp_instance_type);
+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);
+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);
+extern void bgp_confederation_peers_remove(struct bgp *bgp, as_t as);
+
+extern void bgp_timers_set(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 *, as_t, int);
+extern int peer_remote_as(struct bgp *, union sockunion *, const char *, as_t *,
+ int);
+extern int peer_group_remote_as(struct bgp *, const char *, as_t *, int);
+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 int peer_af_flag_check(struct peer *, afi_t, safi_t, uint32_t);
+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 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 *, as_t, bool no_prepend,
+ bool replace_as);
+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 thread *thread);
+extern const char *bgp_get_name_by_role(uint8_t role);
+
+extern void bgp_route_map_terminate(void);
+
+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;
+ default:
+ 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;
+ default:
+ return BGP_AF_MAX;
+ }
+ break;
+ case AFI_L2VPN:
+ switch (safi) {
+ case SAFI_EVPN:
+ return BGP_AF_L2VPN_EVPN;
+ default:
+ return BGP_AF_MAX;
+ }
+ default:
+ return BGP_AF_MAX;
+ }
+}
+
+/* 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)
+{
+ time_t tbuf;
+ tbuf = time(NULL) - (monotime(NULL) - ts);
+ return ctime(&tbuf);
+}
+
+static inline bool peer_established(struct peer *peer)
+{
+ return peer->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));
+}
+
+/* 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 *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_node *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);
+
+#ifdef _FRR_ATTRIBUTE_PRINTFRR
+/* clang-format off */
+#pragma FRR printfrr_ext "%pBP" (struct peer *)
+/* clang-format on */
+#endif
+
+#endif /* _QUAGGA_BGPD_H */