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Diffstat (limited to 'bgpd/bgpd.h')
| -rw-r--r-- | bgpd/bgpd.h | 2586 |
1 files changed, 2586 insertions, 0 deletions
diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h new file mode 100644 index 0000000..f6162f3 --- /dev/null +++ b/bgpd/bgpd.h @@ -0,0 +1,2586 @@ +/* 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 */ |