/* $OpenBSD: bgpd.h,v 1.412 2021/02/16 08:29:16 claudio Exp $ */ /* * Copyright (c) 2003, 2004 Henning Brauer * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef __BGPD_H__ #define __BGPD_H__ #include #include #include #include #include #include #include #include #include #include #include #include #define BGP_VERSION 4 #define BGP_PORT 179 #define CONFFILE "/etc/bgpd.conf" #define BGPD_USER "_bgpd" #define PEER_DESCR_LEN 32 #define REASON_LEN 256 /* includes NUL terminator */ #define PFTABLE_LEN 32 #define TCP_MD5_KEY_LEN 80 #define IPSEC_ENC_KEY_LEN 32 #define IPSEC_AUTH_KEY_LEN 20 #define SET_NAME_LEN 128 #define MAX_PKTSIZE 4096 #define MIN_HOLDTIME 3 #define READ_BUF_SIZE 65535 #define MAX_SOCK_BUF (4 * READ_BUF_SIZE) #define RT_BUF_SIZE 16384 #define MAX_RTSOCK_BUF (2 * 1024 * 1024) #define MAX_COMM_MATCH 3 #define BGPD_OPT_VERBOSE 0x0001 #define BGPD_OPT_VERBOSE2 0x0002 #define BGPD_OPT_NOACTION 0x0004 #define BGPD_OPT_FORCE_DEMOTE 0x0008 #define BGPD_FLAG_REFLECTOR 0x0004 #define BGPD_FLAG_NEXTHOP_BGP 0x0010 #define BGPD_FLAG_NEXTHOP_DEFAULT 0x0020 #define BGPD_FLAG_DECISION_MASK 0x0f00 #define BGPD_FLAG_DECISION_ROUTEAGE 0x0100 #define BGPD_FLAG_DECISION_TRANS_AS 0x0200 #define BGPD_FLAG_DECISION_MED_ALWAYS 0x0400 #define BGPD_FLAG_NO_AS_SET 0x0800 #define BGPD_LOG_UPDATES 0x0001 #define SOCKET_NAME "/var/run/bgpd.sock" #define F_BGPD_INSERTED 0x0001 #define F_KERNEL 0x0002 #define F_CONNECTED 0x0004 #define F_NEXTHOP 0x0008 #define F_DOWN 0x0010 #define F_STATIC 0x0020 #define F_DYNAMIC 0x0040 #define F_REJECT 0x0080 #define F_BLACKHOLE 0x0100 #define F_LONGER 0x0200 #define F_SHORTER 0x0400 #define F_MPLS 0x0800 #define F_CTL_DETAIL 0x1000 /* only set on requests */ #define F_CTL_ADJ_IN 0x2000 /* only set on requests */ #define F_CTL_ADJ_OUT 0x4000 /* only set on requests */ #define F_CTL_ACTIVE 0x8000 #define F_RTLABEL 0x10000 #define F_CTL_SSV 0x20000 /* only used by bgpctl */ #define F_CTL_INVALID 0x40000 /* only set on requests */ #define F_CTL_OVS_VALID 0x80000 #define F_CTL_OVS_INVALID 0x100000 #define F_CTL_OVS_NOTFOUND 0x200000 #define F_CTL_NEIGHBORS 0x400000 /* only used by bgpctl */ /* * Note that these numeric assignments differ from the numbers commonly * used in route origin validation context. */ #define ROA_NOTFOUND 0x0 /* default */ #define ROA_INVALID 0x1 #define ROA_VALID 0x2 #define ROA_MASK 0x3 /* * Limit the number of messages queued in the session engine. * The SE will send an IMSG_XOFF messages to the RDE if the high water mark * is reached. The RDE should then throttle this peer or control connection. * Once the message queue in the SE drops below the low water mark an * IMSG_XON message will be sent and the RDE will produce more messages again. */ #define RDE_RUNNER_ROUNDS 100 #define SESS_MSG_HIGH_MARK 2000 #define SESS_MSG_LOW_MARK 500 #define CTL_MSG_HIGH_MARK 500 #define CTL_MSG_LOW_MARK 100 enum bgpd_process { PROC_MAIN, PROC_SE, PROC_RDE, PROC_RTR, }; enum reconf_action { RECONF_NONE, RECONF_KEEP, RECONF_REINIT, RECONF_RELOAD, RECONF_DELETE }; /* Address Family Numbers as per RFC 1700 */ #define AFI_UNSPEC 0 #define AFI_IPv4 1 #define AFI_IPv6 2 /* Subsequent Address Family Identifier as per RFC 4760 */ #define SAFI_NONE 0 #define SAFI_UNICAST 1 #define SAFI_MULTICAST 2 #define SAFI_MPLS 4 #define SAFI_MPLSVPN 128 struct aid { u_int16_t afi; sa_family_t af; u_int8_t safi; char *name; }; extern const struct aid aid_vals[]; #define AID_UNSPEC 0 #define AID_INET 1 #define AID_INET6 2 #define AID_VPN_IPv4 3 #define AID_VPN_IPv6 4 #define AID_MAX 5 #define AID_MIN 1 /* skip AID_UNSPEC since that is a dummy */ #define AID_VALS { \ /* afi, af, safii, name */ \ { AFI_UNSPEC, AF_UNSPEC, SAFI_NONE, "unspec"}, \ { AFI_IPv4, AF_INET, SAFI_UNICAST, "IPv4 unicast" }, \ { AFI_IPv6, AF_INET6, SAFI_UNICAST, "IPv6 unicast" }, \ { AFI_IPv4, AF_INET, SAFI_MPLSVPN, "IPv4 vpn" }, \ { AFI_IPv6, AF_INET6, SAFI_MPLSVPN, "IPv6 vpn" } \ } #define AID_PTSIZE { \ 0, \ sizeof(struct pt_entry4), \ sizeof(struct pt_entry6), \ sizeof(struct pt_entry_vpn4), \ sizeof(struct pt_entry_vpn6) \ } #define BGP_MPLS_BOS 0x01 struct bgpd_addr { union { struct in_addr v4; struct in6_addr v6; /* maximum size for a prefix is 256 bits */ } ba; /* 128-bit address */ u_int64_t rd; /* route distinguisher for VPN addrs */ u_int32_t scope_id; /* iface scope id for v6 */ u_int8_t aid; u_int8_t labellen; /* size of the labelstack */ u_int8_t labelstack[18]; /* max that makes sense */ #define v4 ba.v4 #define v6 ba.v6 }; #define DEFAULT_LISTENER 0x01 #define LISTENER_LISTENING 0x02 struct listen_addr { TAILQ_ENTRY(listen_addr) entry; struct sockaddr_storage sa; int fd; enum reconf_action reconf; socklen_t sa_len; u_int8_t flags; }; TAILQ_HEAD(listen_addrs, listen_addr); TAILQ_HEAD(filter_set_head, filter_set); struct peer; RB_HEAD(peer_head, peer); struct l3vpn; SIMPLEQ_HEAD(l3vpn_head, l3vpn); struct network; TAILQ_HEAD(network_head, network); struct prefixset; SIMPLEQ_HEAD(prefixset_head, prefixset); struct prefixset_item; RB_HEAD(prefixset_tree, prefixset_item); struct tentry_v4; struct tentry_v6; struct trie_head { struct tentry_v4 *root_v4; struct tentry_v6 *root_v6; int match_default_v4; int match_default_v6; size_t v4_cnt; size_t v6_cnt; }; struct rde_prefixset { char name[SET_NAME_LEN]; struct trie_head th; SIMPLEQ_ENTRY(rde_prefixset) entry; time_t lastchange; int dirty; }; SIMPLEQ_HEAD(rde_prefixset_head, rde_prefixset); struct roa { RB_ENTRY(roa) entry; uint8_t aid; uint8_t prefixlen; uint8_t maxlen; uint8_t pad; uint32_t asnum; union { struct in_addr inet; struct in6_addr inet6; } prefix; }; RB_HEAD(roa_tree, roa); struct set_table; struct as_set; SIMPLEQ_HEAD(as_set_head, as_set); struct filter_rule; TAILQ_HEAD(filter_head, filter_rule); struct rtr_config; SIMPLEQ_HEAD(rtr_config_head, rtr_config); struct bgpd_config { struct peer_head peers; struct l3vpn_head l3vpns; struct network_head networks; struct filter_head *filters; struct listen_addrs *listen_addrs; struct mrt_head *mrt; struct prefixset_head prefixsets; struct prefixset_head originsets; struct roa_tree roa; struct rde_prefixset_head rde_prefixsets; struct rde_prefixset_head rde_originsets; struct as_set_head as_sets; struct rtr_config_head rtrs; char *csock; char *rcsock; int flags; int log; u_int default_tableid; u_int32_t bgpid; u_int32_t clusterid; u_int32_t as; u_int16_t short_as; u_int16_t holdtime; u_int16_t min_holdtime; u_int16_t connectretry; u_int8_t fib_priority; }; extern int cmd_opts; enum export_type { EXPORT_UNSET, EXPORT_NONE, EXPORT_DEFAULT_ROUTE }; enum enforce_as { ENFORCE_AS_UNDEF, ENFORCE_AS_OFF, ENFORCE_AS_ON }; enum auth_method { AUTH_NONE, AUTH_MD5SIG, AUTH_IPSEC_MANUAL_ESP, AUTH_IPSEC_MANUAL_AH, AUTH_IPSEC_IKE_ESP, AUTH_IPSEC_IKE_AH }; struct peer_auth { char md5key[TCP_MD5_KEY_LEN]; char auth_key_in[IPSEC_AUTH_KEY_LEN]; char auth_key_out[IPSEC_AUTH_KEY_LEN]; char enc_key_in[IPSEC_ENC_KEY_LEN]; char enc_key_out[IPSEC_ENC_KEY_LEN]; u_int32_t spi_in; u_int32_t spi_out; enum auth_method method; u_int8_t md5key_len; u_int8_t auth_alg_in; u_int8_t auth_alg_out; u_int8_t auth_keylen_in; u_int8_t auth_keylen_out; u_int8_t enc_alg_in; u_int8_t enc_alg_out; u_int8_t enc_keylen_in; u_int8_t enc_keylen_out; }; struct capabilities { struct { int16_t timeout; /* graceful restart timeout */ int8_t flags[AID_MAX]; /* graceful restart per AID flags */ int8_t restart; /* graceful restart, RFC 4724 */ } grestart; int8_t mp[AID_MAX]; /* multiprotocol extensions, RFC 4760 */ int8_t refresh; /* route refresh, RFC 2918 */ int8_t as4byte; /* 4-byte ASnum, RFC 4893 */ }; #define CAPA_GR_PRESENT 0x01 #define CAPA_GR_RESTART 0x02 #define CAPA_GR_FORWARD 0x04 #define CAPA_GR_RESTARTING 0x08 #define CAPA_GR_TIMEMASK 0x0fff #define CAPA_GR_R_FLAG 0x8000 #define CAPA_GR_F_FLAG 0x80 struct peer_config { struct bgpd_addr remote_addr; struct bgpd_addr local_addr_v4; struct bgpd_addr local_addr_v6; struct peer_auth auth; struct capabilities capabilities; char group[PEER_DESCR_LEN]; char descr[PEER_DESCR_LEN]; char reason[REASON_LEN]; char rib[PEER_DESCR_LEN]; char if_depend[IFNAMSIZ]; char demote_group[IFNAMSIZ]; u_int32_t id; u_int32_t groupid; u_int32_t remote_as; u_int32_t local_as; u_int32_t max_prefix; u_int32_t max_out_prefix; enum export_type export_type; enum enforce_as enforce_as; enum enforce_as enforce_local_as; u_int16_t max_prefix_restart; u_int16_t max_out_prefix_restart; u_int16_t holdtime; u_int16_t min_holdtime; u_int16_t local_short_as; u_int8_t template; u_int8_t remote_masklen; u_int8_t ebgp; /* 0 = ibgp else ebgp */ u_int8_t distance; /* 1 = direct, >1 = multihop */ u_int8_t passive; u_int8_t down; u_int8_t announce_capa; u_int8_t reflector_client; u_int8_t ttlsec; /* TTL security hack */ u_int8_t flags; }; #define PEER_ID_NONE 0 #define PEER_ID_SELF 1 #define PEER_ID_STATIC_MIN 2 /* exclude self */ #define PEER_ID_STATIC_MAX (UINT_MAX / 2) #define PEER_ID_DYN_MAX UINT_MAX #define PEERFLAG_TRANS_AS 0x01 #define PEERFLAG_LOG_UPDATES 0x02 #define PEERFLAG_NO_AS_SET 0x04 enum network_type { NETWORK_DEFAULT, /* from network statements */ NETWORK_STATIC, NETWORK_CONNECTED, NETWORK_RTLABEL, NETWORK_MRTCLONE, NETWORK_PRIORITY, NETWORK_PREFIXSET, }; struct network_config { struct bgpd_addr prefix; struct filter_set_head attrset; char psname[SET_NAME_LEN]; u_int64_t rd; u_int16_t rtlabel; enum network_type type; u_int8_t prefixlen; u_int8_t priority; u_int8_t old; /* used for reloading */ }; struct network { struct network_config net; TAILQ_ENTRY(network) entry; }; enum rtr_error { NO_ERROR = -1, CORRUPT_DATA = 0, INTERNAL_ERROR, NO_DATA_AVAILABLE, INVALID_REQUEST, UNSUPP_PROTOCOL_VERS, UNSUPP_PDU_TYPE, UNK_REC_WDRAWL, DUP_REC_RECV, UNEXP_PROTOCOL_VERS, }; struct rtr_config { SIMPLEQ_ENTRY(rtr_config) entry; char descr[PEER_DESCR_LEN]; struct bgpd_addr remote_addr; struct bgpd_addr local_addr; u_int32_t id; in_addr_t remote_port; }; struct ctl_show_rtr { char descr[PEER_DESCR_LEN]; struct bgpd_addr remote_addr; struct bgpd_addr local_addr; uint32_t serial; uint32_t refresh; uint32_t retry; uint32_t expire; int session_id; in_addr_t remote_port; enum rtr_error last_sent_error; enum rtr_error last_recv_error; char last_sent_msg[REASON_LEN]; char last_recv_msg[REASON_LEN]; }; enum imsg_type { IMSG_NONE, IMSG_CTL_END, IMSG_CTL_RELOAD, IMSG_CTL_FIB_COUPLE, IMSG_CTL_FIB_DECOUPLE, IMSG_CTL_NEIGHBOR_UP, IMSG_CTL_NEIGHBOR_DOWN, IMSG_CTL_NEIGHBOR_CLEAR, IMSG_CTL_NEIGHBOR_RREFRESH, IMSG_CTL_NEIGHBOR_DESTROY, IMSG_CTL_KROUTE, IMSG_CTL_KROUTE_ADDR, IMSG_CTL_RESULT, IMSG_CTL_SHOW_NEIGHBOR, IMSG_CTL_SHOW_NEXTHOP, IMSG_CTL_SHOW_INTERFACE, IMSG_CTL_SHOW_RIB, IMSG_CTL_SHOW_RIB_PREFIX, IMSG_CTL_SHOW_RIB_COMMUNITIES, IMSG_CTL_SHOW_RIB_ATTR, IMSG_CTL_SHOW_NETWORK, IMSG_CTL_SHOW_RIB_MEM, IMSG_CTL_SHOW_RIB_HASH, IMSG_CTL_SHOW_TERSE, IMSG_CTL_SHOW_TIMER, IMSG_CTL_LOG_VERBOSE, IMSG_CTL_SHOW_FIB_TABLES, IMSG_CTL_SHOW_SET, IMSG_CTL_SHOW_RTR, IMSG_CTL_TERMINATE, IMSG_NETWORK_ADD, IMSG_NETWORK_ASPATH, IMSG_NETWORK_ATTR, IMSG_NETWORK_REMOVE, IMSG_NETWORK_FLUSH, IMSG_NETWORK_DONE, IMSG_FILTER_SET, IMSG_SOCKET_CONN, IMSG_SOCKET_CONN_CTL, IMSG_SOCKET_CONN_RTR, IMSG_RECONF_CONF, IMSG_RECONF_RIB, IMSG_RECONF_PEER, IMSG_RECONF_FILTER, IMSG_RECONF_LISTENER, IMSG_RECONF_CTRL, IMSG_RECONF_VPN, IMSG_RECONF_VPN_EXPORT, IMSG_RECONF_VPN_IMPORT, IMSG_RECONF_VPN_DONE, IMSG_RECONF_PREFIX_SET, IMSG_RECONF_PREFIX_SET_ITEM, IMSG_RECONF_AS_SET, IMSG_RECONF_AS_SET_ITEMS, IMSG_RECONF_AS_SET_DONE, IMSG_RECONF_ORIGIN_SET, IMSG_RECONF_ROA_SET, IMSG_RECONF_ROA_ITEM, IMSG_RECONF_RTR_CONFIG, IMSG_RECONF_DRAIN, IMSG_RECONF_DONE, IMSG_UPDATE, IMSG_UPDATE_ERR, IMSG_SESSION_ADD, IMSG_SESSION_UP, IMSG_SESSION_DOWN, IMSG_SESSION_STALE, IMSG_SESSION_FLUSH, IMSG_SESSION_RESTARTED, IMSG_PFKEY_RELOAD, IMSG_MRT_OPEN, IMSG_MRT_REOPEN, IMSG_MRT_CLOSE, IMSG_KROUTE_CHANGE, IMSG_KROUTE_DELETE, IMSG_KROUTE_FLUSH, IMSG_NEXTHOP_ADD, IMSG_NEXTHOP_REMOVE, IMSG_NEXTHOP_UPDATE, IMSG_PFTABLE_ADD, IMSG_PFTABLE_REMOVE, IMSG_PFTABLE_COMMIT, IMSG_REFRESH, IMSG_IFINFO, IMSG_DEMOTE, IMSG_XON, IMSG_XOFF }; struct demote_msg { char demote_group[IFNAMSIZ]; int level; }; enum ctl_results { CTL_RES_OK, CTL_RES_NOSUCHPEER, CTL_RES_DENIED, CTL_RES_NOCAP, CTL_RES_PARSE_ERROR, CTL_RES_PENDING, CTL_RES_NOMEM, CTL_RES_BADPEER, CTL_RES_BADSTATE, CTL_RES_NOSUCHRIB }; /* needed for session.h parse prototype */ LIST_HEAD(mrt_head, mrt); /* error codes and subcodes needed in SE and RDE */ enum err_codes { ERR_HEADER = 1, ERR_OPEN, ERR_UPDATE, ERR_HOLDTIMEREXPIRED, ERR_FSM, ERR_CEASE }; enum suberr_update { ERR_UPD_UNSPECIFIC, ERR_UPD_ATTRLIST, ERR_UPD_UNKNWN_WK_ATTR, ERR_UPD_MISSNG_WK_ATTR, ERR_UPD_ATTRFLAGS, ERR_UPD_ATTRLEN, ERR_UPD_ORIGIN, ERR_UPD_LOOP, ERR_UPD_NEXTHOP, ERR_UPD_OPTATTR, ERR_UPD_NETWORK, ERR_UPD_ASPATH }; enum suberr_cease { ERR_CEASE_MAX_PREFIX = 1, ERR_CEASE_ADMIN_DOWN, ERR_CEASE_PEER_UNCONF, ERR_CEASE_ADMIN_RESET, ERR_CEASE_CONN_REJECT, ERR_CEASE_OTHER_CHANGE, ERR_CEASE_COLLISION, ERR_CEASE_RSRC_EXHAUST, ERR_CEASE_HARD_RESET, ERR_CEASE_MAX_SENT_PREFIX }; struct kroute_node; struct kroute6_node; struct knexthop_node; struct kredist_node; RB_HEAD(kroute_tree, kroute_node); RB_HEAD(kroute6_tree, kroute6_node); RB_HEAD(knexthop_tree, knexthop_node); RB_HEAD(kredist_tree, kredist_node); struct ktable { char descr[PEER_DESCR_LEN]; struct kroute_tree krt; struct kroute6_tree krt6; struct knexthop_tree knt; struct kredist_tree kredist; struct network_head krn; u_int rtableid; u_int nhtableid; /* rdomain id for nexthop lookup */ int nhrefcnt; /* refcnt for nexthop table */ enum reconf_action state; u_int8_t fib_conf; /* configured FIB sync flag */ u_int8_t fib_sync; /* is FIB synced with kernel? */ }; struct kroute_full { struct bgpd_addr prefix; struct bgpd_addr nexthop; char label[RTLABEL_LEN]; u_int16_t labelid; u_int16_t flags; u_short ifindex; u_int8_t prefixlen; u_int8_t priority; }; struct kroute { struct in_addr prefix; struct in_addr nexthop; u_int32_t mplslabel; u_int16_t flags; u_int16_t labelid; u_short ifindex; u_int8_t prefixlen; u_int8_t priority; }; struct kroute6 { struct in6_addr prefix; struct in6_addr nexthop; u_int32_t mplslabel; u_int16_t flags; u_int16_t labelid; u_short ifindex; u_int8_t prefixlen; u_int8_t priority; }; struct kroute_nexthop { struct bgpd_addr nexthop; struct bgpd_addr gateway; struct bgpd_addr net; u_int8_t valid; u_int8_t connected; u_int8_t netlen; }; struct kif { char ifname[IFNAMSIZ]; u_int64_t baudrate; u_int rdomain; int flags; u_short ifindex; u_int8_t if_type; u_int8_t link_state; u_int8_t nh_reachable; /* for nexthop verification */ u_int8_t depend_state; /* for session depend on */ }; struct session_up { struct bgpd_addr local_v4_addr; struct bgpd_addr local_v6_addr; struct bgpd_addr remote_addr; struct capabilities capa; u_int32_t remote_bgpid; u_int16_t short_as; }; struct pftable_msg { struct bgpd_addr addr; char pftable[PFTABLE_LEN]; u_int8_t len; }; struct ctl_show_interface { char ifname[IFNAMSIZ]; char linkstate[32]; char media[32]; u_int64_t baudrate; u_int rdomain; u_int8_t nh_reachable; u_int8_t is_up; }; struct ctl_show_nexthop { struct bgpd_addr addr; struct ctl_show_interface iface; union { struct kroute kr4; struct kroute6 kr6; } kr; u_int8_t valid; u_int8_t krvalid; }; struct ctl_show_set { char name[SET_NAME_LEN]; time_t lastchange; size_t v4_cnt; size_t v6_cnt; size_t as_cnt; enum { ASNUM_SET, PREFIX_SET, ORIGIN_SET, ROA_SET, } type; }; struct ctl_neighbor { struct bgpd_addr addr; char descr[PEER_DESCR_LEN]; char reason[REASON_LEN]; int show_timers; int is_group; }; #define F_PREF_ELIGIBLE 0x01 #define F_PREF_ACTIVE 0x02 #define F_PREF_INTERNAL 0x04 #define F_PREF_ANNOUNCE 0x08 #define F_PREF_STALE 0x10 #define F_PREF_INVALID 0x20 struct ctl_show_rib { struct bgpd_addr true_nexthop; struct bgpd_addr exit_nexthop; struct bgpd_addr prefix; struct bgpd_addr remote_addr; char descr[PEER_DESCR_LEN]; time_t age; u_int32_t remote_id; u_int32_t local_pref; u_int32_t med; u_int32_t weight; u_int32_t flags; u_int8_t prefixlen; u_int8_t origin; u_int8_t validation_state; /* plus an aspath */ }; enum as_spec { AS_UNDEF, AS_ALL, AS_SOURCE, AS_TRANSIT, AS_PEER, AS_EMPTY }; enum aslen_spec { ASLEN_NONE, ASLEN_MAX, ASLEN_SEQ }; #define AS_FLAG_NEIGHBORAS 0x01 #define AS_FLAG_AS_SET_NAME 0x02 #define AS_FLAG_AS_SET 0x04 struct filter_as { char name[SET_NAME_LEN]; struct as_set *aset; u_int32_t as_min; u_int32_t as_max; enum as_spec type; u_int8_t flags; u_int8_t op; }; struct filter_aslen { u_int aslen; enum aslen_spec type; }; #define PREFIXSET_FLAG_FILTER 0x01 #define PREFIXSET_FLAG_DIRTY 0x02 /* prefix-set changed at reload */ #define PREFIXSET_FLAG_OPS 0x04 /* indiv. prefixes have prefixlenops */ #define PREFIXSET_FLAG_LONGER 0x08 /* filter all prefixes with or-longer */ struct filter_prefixset { int flags; char name[SET_NAME_LEN]; struct rde_prefixset *ps; }; struct filter_originset { char name[SET_NAME_LEN]; struct rde_prefixset *ps; }; struct filter_ovs { u_int8_t validity; u_int8_t is_set; }; /* * Communities are encoded depending on their type. The low byte of flags * is the COMMUNITY_TYPE (BASIC, LARGE, EXT). BASIC encoding is just using * data1 and data2, LARGE uses all data fields and EXT is also using all * data fields. The 4-byte flags fields consists of up to 3 data flags * for e.g. COMMUNITY_ANY and the low byte is the community type. * If flags is 0 the community struct is unused. If the upper 24bit of * flags is 0 a fast compare can be used. * The code uses a type cast to u_int8_t to access the type. */ struct community { u_int32_t flags; u_int32_t data1; u_int32_t data2; u_int32_t data3; }; struct ctl_show_rib_request { char rib[PEER_DESCR_LEN]; struct ctl_neighbor neighbor; struct bgpd_addr prefix; struct filter_as as; struct community community; u_int32_t flags; u_int8_t validation_state; pid_t pid; enum imsg_type type; u_int8_t prefixlen; u_int8_t aid; }; enum filter_actions { ACTION_NONE, ACTION_ALLOW, ACTION_DENY }; enum directions { DIR_IN = 1, DIR_OUT }; enum from_spec { FROM_ALL, FROM_ADDRESS, FROM_DESCR, FROM_GROUP }; enum comp_ops { OP_NONE, OP_RANGE, OP_XRANGE, OP_EQ, OP_NE, OP_LE, OP_LT, OP_GE, OP_GT }; struct filter_peers { u_int32_t peerid; u_int32_t groupid; u_int32_t remote_as; u_int16_t ribid; u_int8_t ebgp; u_int8_t ibgp; }; /* special community type, keep in sync with the attribute type */ #define COMMUNITY_TYPE_NONE 0 #define COMMUNITY_TYPE_BASIC 8 #define COMMUNITY_TYPE_EXT 16 #define COMMUNITY_TYPE_LARGE 32 #define COMMUNITY_ANY 1 #define COMMUNITY_NEIGHBOR_AS 2 #define COMMUNITY_LOCAL_AS 3 /* wellknown community definitions */ #define COMMUNITY_WELLKNOWN 0xffff #define COMMUNITY_GRACEFUL_SHUTDOWN 0x0000 /* RFC 8326 */ #define COMMUNITY_BLACKHOLE 0x029A /* RFC 7999 */ #define COMMUNITY_NO_EXPORT 0xff01 #define COMMUNITY_NO_ADVERTISE 0xff02 #define COMMUNITY_NO_EXPSUBCONFED 0xff03 #define COMMUNITY_NO_PEER 0xff04 /* RFC 3765 */ /* extended community definitions */ #define EXT_COMMUNITY_IANA 0x80 #define EXT_COMMUNITY_NON_TRANSITIVE 0x40 #define EXT_COMMUNITY_VALUE 0x3f /* extended types transitive */ #define EXT_COMMUNITY_TRANS_TWO_AS 0x00 /* 2 octet AS specific */ #define EXT_COMMUNITY_TRANS_IPV4 0x01 /* IPv4 specific */ #define EXT_COMMUNITY_TRANS_FOUR_AS 0x02 /* 4 octet AS specific */ #define EXT_COMMUNITY_TRANS_OPAQUE 0x03 /* opaque ext community */ #define EXT_COMMUNITY_TRANS_EVPN 0x06 /* EVPN RFC7432 */ /* extended types non-transitive */ #define EXT_COMMUNITY_NON_TRANS_TWO_AS 0x40 /* 2 octet AS specific */ #define EXT_COMMUNITY_NON_TRANS_IPV4 0x41 /* IPv4 specific */ #define EXT_COMMUNITY_NON_TRANS_FOUR_AS 0x42 /* 4 octet AS specific */ #define EXT_COMMUNITY_NON_TRANS_OPAQUE 0x43 /* opaque ext community */ #define EXT_COMMUNITY_UNKNOWN -1 /* BGP Origin Validation State Extended Community RFC8097 */ #define EXT_COMMUNITY_SUBTYPE_OVS 0 #define EXT_COMMUNITY_OVS_VALID 0 #define EXT_COMMUNITY_OVS_NOTFOUND 1 #define EXT_COMMUNITY_OVS_INVALID 2 /* other handy defines */ #define EXT_COMMUNITY_OPAQUE_MAX 0xffffffffffffULL #define EXT_COMMUNITY_FLAG_VALID 0x01 struct ext_comm_pairs { short type; u_int8_t subtype; const char *subname; }; #define IANA_EXT_COMMUNITIES { \ { EXT_COMMUNITY_TRANS_TWO_AS, 0x02, "rt" }, \ { EXT_COMMUNITY_TRANS_TWO_AS, 0x03, "soo" }, \ { EXT_COMMUNITY_TRANS_TWO_AS, 0x05, "odi" }, \ { EXT_COMMUNITY_TRANS_TWO_AS, 0x08, "bdc" }, \ { EXT_COMMUNITY_TRANS_TWO_AS, 0x09, "srcas" }, \ { EXT_COMMUNITY_TRANS_TWO_AS, 0x0a, "l2vid" }, \ \ { EXT_COMMUNITY_TRANS_FOUR_AS, 0x02, "rt" }, \ { EXT_COMMUNITY_TRANS_FOUR_AS, 0x03, "soo" }, \ { EXT_COMMUNITY_TRANS_FOUR_AS, 0x05, "odi" }, \ { EXT_COMMUNITY_TRANS_FOUR_AS, 0x08, "bdc" }, \ { EXT_COMMUNITY_TRANS_FOUR_AS, 0x09, "srcas" }, \ \ { EXT_COMMUNITY_TRANS_IPV4, 0x02, "rt" }, \ { EXT_COMMUNITY_TRANS_IPV4, 0x03, "soo" }, \ { EXT_COMMUNITY_TRANS_IPV4, 0x05, "odi" }, \ { EXT_COMMUNITY_TRANS_IPV4, 0x07, "ori" }, \ { EXT_COMMUNITY_TRANS_IPV4, 0x0a, "l2vid" }, \ { EXT_COMMUNITY_TRANS_IPV4, 0x0b, "vrfri" }, \ \ { EXT_COMMUNITY_TRANS_OPAQUE, 0x06, "ort" }, \ { EXT_COMMUNITY_TRANS_OPAQUE, 0x0d, "defgw" }, \ \ { EXT_COMMUNITY_NON_TRANS_OPAQUE, EXT_COMMUNITY_SUBTYPE_OVS, "ovs" }, \ \ { EXT_COMMUNITY_TRANS_EVPN, 0x00, "mac-mob" }, \ { EXT_COMMUNITY_TRANS_EVPN, 0x01, "esi-lab" }, \ { EXT_COMMUNITY_TRANS_EVPN, 0x02, "esi-rt" }, \ \ { 0 } \ } extern const struct ext_comm_pairs iana_ext_comms[]; struct filter_prefix { struct bgpd_addr addr; u_int8_t op; u_int8_t len; u_int8_t len_min; u_int8_t len_max; }; struct filter_nexthop { struct bgpd_addr addr; u_int8_t flags; #define FILTER_NEXTHOP_ADDR 1 #define FILTER_NEXTHOP_NEIGHBOR 2 }; struct filter_match { struct filter_prefix prefix; struct filter_nexthop nexthop; struct filter_as as; struct filter_aslen aslen; struct community community[MAX_COMM_MATCH]; struct filter_prefixset prefixset; struct filter_originset originset; struct filter_ovs ovs; }; struct filter_rule { TAILQ_ENTRY(filter_rule) entry; char rib[PEER_DESCR_LEN]; struct filter_peers peer; struct filter_match match; struct filter_set_head set; #define RDE_FILTER_SKIP_DIR 0 #define RDE_FILTER_SKIP_GROUPID 1 #define RDE_FILTER_SKIP_REMOTE_AS 2 #define RDE_FILTER_SKIP_PEERID 3 #define RDE_FILTER_SKIP_COUNT 4 struct filter_rule *skip[RDE_FILTER_SKIP_COUNT]; enum filter_actions action; enum directions dir; u_int8_t quick; }; enum action_types { ACTION_SET_LOCALPREF, ACTION_SET_RELATIVE_LOCALPREF, ACTION_SET_MED, ACTION_SET_RELATIVE_MED, ACTION_SET_WEIGHT, ACTION_SET_RELATIVE_WEIGHT, ACTION_SET_PREPEND_SELF, ACTION_SET_PREPEND_PEER, ACTION_SET_AS_OVERRIDE, ACTION_SET_NEXTHOP, ACTION_SET_NEXTHOP_REF, ACTION_SET_NEXTHOP_REJECT, ACTION_SET_NEXTHOP_BLACKHOLE, ACTION_SET_NEXTHOP_NOMODIFY, ACTION_SET_NEXTHOP_SELF, ACTION_DEL_COMMUNITY, ACTION_SET_COMMUNITY, ACTION_PFTABLE, ACTION_PFTABLE_ID, ACTION_RTLABEL, ACTION_RTLABEL_ID, ACTION_SET_ORIGIN }; struct nexthop; struct filter_set { TAILQ_ENTRY(filter_set) entry; union { u_int8_t prepend; u_int16_t id; u_int32_t metric; int32_t relative; struct bgpd_addr nexthop; struct nexthop *nh_ref; struct community community; char pftable[PFTABLE_LEN]; char rtlabel[RTLABEL_LEN]; u_int8_t origin; } action; enum action_types type; }; struct roa_set { u_int32_t as; /* must be first */ u_int32_t maxlen; /* change type for better struct layout */ }; struct prefixset_item { struct filter_prefix p; RB_ENTRY(prefixset_item) entry; }; struct prefixset { int sflags; char name[SET_NAME_LEN]; struct prefixset_tree psitems; struct roa_tree roaitems; SIMPLEQ_ENTRY(prefixset) entry; }; struct as_set { char name[SET_NAME_LEN]; SIMPLEQ_ENTRY(as_set) entry; struct set_table *set; time_t lastchange; int dirty; }; struct l3vpn { SIMPLEQ_ENTRY(l3vpn) entry; char descr[PEER_DESCR_LEN]; char ifmpe[IFNAMSIZ]; struct filter_set_head import; struct filter_set_head export; struct network_head net_l; u_int64_t rd; u_int rtableid; u_int label; int flags; }; struct rde_rib { SIMPLEQ_ENTRY(rde_rib) entry; char name[PEER_DESCR_LEN]; u_int rtableid; u_int16_t id; u_int16_t flags; }; SIMPLEQ_HEAD(rib_names, rde_rib); extern struct rib_names ribnames; /* rde_rib flags */ #define F_RIB_LOCAL 0x0001 #define F_RIB_NOEVALUATE 0x0002 #define F_RIB_NOFIB 0x0004 #define F_RIB_NOFIBSYNC 0x0008 /* 4-byte magic AS number */ #define AS_TRANS 23456 /* AS_NONE for origin validation */ #define AS_NONE 0 struct rde_memstats { long long path_cnt; long long path_refs; long long prefix_cnt; long long rib_cnt; long long pt_cnt[AID_MAX]; long long nexthop_cnt; long long aspath_cnt; long long aspath_size; long long aspath_refs; long long comm_cnt; long long comm_nmemb; long long comm_size; long long comm_refs; long long attr_cnt; long long attr_refs; long long attr_data; long long attr_dcnt; long long aset_cnt; long long aset_size; long long aset_nmemb; long long pset_cnt; long long pset_size; }; struct rde_hashstats { char name[16]; long long num; long long min; long long max; long long sum; long long sumq; }; #define MRT_FILE_LEN 512 #define MRT2MC(x) ((struct mrt_config *)(x)) enum mrt_type { MRT_NONE, MRT_TABLE_DUMP, MRT_TABLE_DUMP_MP, MRT_TABLE_DUMP_V2, MRT_ALL_IN, MRT_ALL_OUT, MRT_UPDATE_IN, MRT_UPDATE_OUT }; enum mrt_state { MRT_STATE_RUNNING, MRT_STATE_OPEN, MRT_STATE_REOPEN, MRT_STATE_REMOVE }; struct mrt { char rib[PEER_DESCR_LEN]; struct msgbuf wbuf; LIST_ENTRY(mrt) entry; u_int32_t peer_id; u_int32_t group_id; enum mrt_type type; enum mrt_state state; u_int16_t seqnum; }; struct mrt_config { struct mrt conf; char name[MRT_FILE_LEN]; /* base file name */ char file[MRT_FILE_LEN]; /* actual file name */ time_t ReopenTimer; int ReopenTimerInterval; }; /* prototypes */ /* bgpd.c */ void send_nexthop_update(struct kroute_nexthop *); void send_imsg_session(int, pid_t, void *, u_int16_t); int send_network(int, struct network_config *, struct filter_set_head *); int bgpd_filternexthop(struct kroute *, struct kroute6 *); void set_pollfd(struct pollfd *, struct imsgbuf *); int handle_pollfd(struct pollfd *, struct imsgbuf *); /* control.c */ int control_imsg_relay(struct imsg *); /* config.c */ struct bgpd_config *new_config(void); void copy_config(struct bgpd_config *, struct bgpd_config *); void free_l3vpns(struct l3vpn_head *); void free_config(struct bgpd_config *); void free_prefixsets(struct prefixset_head *); void free_rde_prefixsets(struct rde_prefixset_head *); void free_prefixtree(struct prefixset_tree *); void free_roatree(struct roa_tree *); void free_rtrs(struct rtr_config_head *); void filterlist_free(struct filter_head *); int host(const char *, struct bgpd_addr *, u_int8_t *); u_int32_t get_bgpid(void); void expand_networks(struct bgpd_config *); RB_PROTOTYPE(prefixset_tree, prefixset_item, entry, prefixset_cmp); int roa_cmp(struct roa *, struct roa *); RB_PROTOTYPE(roa_tree, roa, entry, roa_cmp); /* kroute.c */ int kr_init(int *); int ktable_update(u_int, char *, int, u_int8_t); void ktable_preload(void); void ktable_postload(u_int8_t); int ktable_exists(u_int, u_int *); int kr_change(u_int, struct kroute_full *, u_int8_t); int kr_delete(u_int, struct kroute_full *, u_int8_t); int kr_flush(u_int); void kr_shutdown(u_int8_t, u_int); void kr_fib_couple(u_int, u_int8_t); void kr_fib_couple_all(u_int8_t); void kr_fib_decouple(u_int, u_int8_t); void kr_fib_decouple_all(u_int8_t); void kr_fib_update_prio_all(u_int8_t); int kr_dispatch_msg(u_int rdomain); int kr_nexthop_add(u_int32_t, struct bgpd_addr *, struct bgpd_config *); void kr_nexthop_delete(u_int32_t, struct bgpd_addr *, struct bgpd_config *); void kr_show_route(struct imsg *); void kr_ifinfo(char *); void kr_net_reload(u_int, u_int64_t, struct network_head *); int kr_reload(void); struct in6_addr *prefixlen2mask6(u_int8_t prefixlen); int get_mpe_config(const char *, u_int *, u_int *); /* log.c */ void log_peer_info(const struct peer_config *, const char *, ...) __attribute__((__format__ (printf, 2, 3))); void log_peer_warn(const struct peer_config *, const char *, ...) __attribute__((__format__ (printf, 2, 3))); void log_peer_warnx(const struct peer_config *, const char *, ...) __attribute__((__format__ (printf, 2, 3))); /* mrt.c */ void mrt_clear_seq(void); void mrt_write(struct mrt *); void mrt_clean(struct mrt *); void mrt_init(struct imsgbuf *, struct imsgbuf *); time_t mrt_timeout(struct mrt_head *); void mrt_reconfigure(struct mrt_head *); void mrt_handler(struct mrt_head *); struct mrt *mrt_get(struct mrt_head *, struct mrt *); void mrt_mergeconfig(struct mrt_head *, struct mrt_head *); /* name2id.c */ u_int16_t rib_name2id(const char *); const char *rib_id2name(u_int16_t); void rib_unref(u_int16_t); void rib_ref(u_int16_t); u_int16_t rtlabel_name2id(const char *); const char *rtlabel_id2name(u_int16_t); void rtlabel_unref(u_int16_t); u_int16_t rtlabel_ref(u_int16_t); u_int16_t pftable_name2id(const char *); const char *pftable_id2name(u_int16_t); void pftable_unref(u_int16_t); u_int16_t pftable_ref(u_int16_t); /* parse.y */ int cmdline_symset(char *); struct prefixset *find_prefixset(char *, struct prefixset_head *); struct bgpd_config *parse_config(char *, struct peer_head *, struct rtr_config_head *); /* pftable.c */ int pftable_exists(const char *); int pftable_add(const char *); int pftable_clear_all(void); int pftable_addr_add(struct pftable_msg *); int pftable_addr_remove(struct pftable_msg *); int pftable_commit(void); /* rde_filter.c */ void filterset_free(struct filter_set_head *); int filterset_cmp(struct filter_set *, struct filter_set *); void filterset_move(struct filter_set_head *, struct filter_set_head *); void filterset_copy(struct filter_set_head *, struct filter_set_head *); const char *filterset_name(enum action_types); /* rde_sets.c */ struct as_set *as_sets_lookup(struct as_set_head *, const char *); struct as_set *as_sets_new(struct as_set_head *, const char *, size_t, size_t); void as_sets_free(struct as_set_head *); void as_sets_mark_dirty(struct as_set_head *, struct as_set_head *); int as_set_match(const struct as_set *, u_int32_t); struct set_table *set_new(size_t, size_t); void set_free(struct set_table *); int set_add(struct set_table *, void *, size_t); void *set_get(struct set_table *, size_t *); void set_prep(struct set_table *); void *set_match(const struct set_table *, u_int32_t); int set_equal(const struct set_table *, const struct set_table *); size_t set_nmemb(const struct set_table *); /* rde_trie.c */ int trie_add(struct trie_head *, struct bgpd_addr *, u_int8_t, u_int8_t, u_int8_t); int trie_roa_add(struct trie_head *, struct roa *); void trie_free(struct trie_head *); int trie_match(struct trie_head *, struct bgpd_addr *, u_int8_t, int); int trie_roa_check(struct trie_head *, struct bgpd_addr *, u_int8_t, u_int32_t); void trie_dump(struct trie_head *); int trie_equal(struct trie_head *, struct trie_head *); /* timer.c */ time_t getmonotime(void); /* util.c */ const char *log_addr(const struct bgpd_addr *); const char *log_in6addr(const struct in6_addr *); const char *log_sockaddr(struct sockaddr *, socklen_t); const char *log_as(u_int32_t); const char *log_rd(u_int64_t); const char *log_ext_subtype(short, u_int8_t); const char *log_reason(const char *); const char *log_rtr_error(enum rtr_error); int aspath_snprint(char *, size_t, void *, u_int16_t); int aspath_asprint(char **, void *, u_int16_t); size_t aspath_strlen(void *, u_int16_t); u_int32_t aspath_extract(const void *, int); int aspath_verify(void *, u_int16_t, int, int); #define AS_ERR_LEN -1 #define AS_ERR_TYPE -2 #define AS_ERR_BAD -3 #define AS_ERR_SOFT -4 u_char *aspath_inflate(void *, u_int16_t, u_int16_t *); int nlri_get_prefix(u_char *, u_int16_t, struct bgpd_addr *, u_int8_t *); int nlri_get_prefix6(u_char *, u_int16_t, struct bgpd_addr *, u_int8_t *); int nlri_get_vpn4(u_char *, u_int16_t, struct bgpd_addr *, u_int8_t *, int); int nlri_get_vpn6(u_char *, u_int16_t, struct bgpd_addr *, u_int8_t *, int); int prefix_compare(const struct bgpd_addr *, const struct bgpd_addr *, int); in_addr_t prefixlen2mask(u_int8_t); void inet4applymask(struct in_addr *, const struct in_addr *, int); void inet6applymask(struct in6_addr *, const struct in6_addr *, int); const char *aid2str(u_int8_t); int aid2afi(u_int8_t, u_int16_t *, u_int8_t *); int afi2aid(u_int16_t, u_int8_t, u_int8_t *); sa_family_t aid2af(u_int8_t); int af2aid(sa_family_t, u_int8_t, u_int8_t *); struct sockaddr *addr2sa(const struct bgpd_addr *, u_int16_t, socklen_t *); void sa2addr(struct sockaddr *, struct bgpd_addr *, u_int16_t *); const char * get_baudrate(unsigned long long, char *); static const char * const log_procnames[] = { "parent", "SE", "RDE", "RTR" }; /* logmsg.c and needed by bgpctl */ static const char * const statenames[] = { "None", "Idle", "Connect", "Active", "OpenSent", "OpenConfirm", "Established" }; static const char * const msgtypenames[] = { "NONE", "OPEN", "UPDATE", "NOTIFICATION", "KEEPALIVE", "RREFRESH" }; static const char * const eventnames[] = { "None", "Start", "Stop", "Connection opened", "Connection closed", "Connection open failed", "Fatal error", "ConnectRetryTimer expired", "HoldTimer expired", "KeepaliveTimer expired", "SendHoldTimer expired", "OPEN message received", "KEEPALIVE message received", "UPDATE message received", "NOTIFICATION received" }; static const char * const errnames[] = { "none", "Header error", "error in OPEN message", "error in UPDATE message", "HoldTimer expired", "Finite State Machine error", "Cease" }; static const char * const suberr_header_names[] = { "none", "synchronization error", "wrong length", "unknown message type" }; static const char * const suberr_open_names[] = { "none", "version mismatch", "AS unacceptable", "BGPID invalid", "optional parameter error", "authentication error", "unacceptable holdtime", "unsupported capability", "group membership conflict", /* draft-ietf-idr-bgp-multisession-07 */ "group membership required" /* draft-ietf-idr-bgp-multisession-07 */ }; static const char * const suberr_fsm_names[] = { "unspecified error", "received unexpected message in OpenSent", "received unexpected message in OpenConfirm", "received unexpected message in Established" }; static const char * const suberr_update_names[] = { "none", "attribute list error", "unknown well-known attribute", "well-known attribute missing", "attribute flags error", "attribute length wrong", "origin unacceptable", "loop detected", "nexthop unacceptable", "optional attribute error", "network unacceptable", "AS-Path unacceptable" }; static const char * const suberr_cease_names[] = { "none", "received max-prefix exceeded", "administratively down", "peer unconfigured", "administrative reset", "connection rejected", "other config change", "collision", "resource exhaustion", "hard reset", "sent max-prefix exceeded" }; static const char * const ctl_res_strerror[] = { "no error", "no such neighbor", "permission denied", "neighbor does not have this capability", "config file has errors, reload failed", "previous reload still running", "out of memory", "not a cloned peer", "peer still active, down peer first", "no such RIB" }; static const char * const timernames[] = { "None", "ConnectRetryTimer", "KeepaliveTimer", "HoldTimer", "SendHoldTimer", "IdleHoldTimer", "IdleHoldResetTimer", "CarpUndemoteTimer", "RestartTimer", "RTR RefreshTimer", "RTR RetryTimer", "RTR ExpireTimer", "" }; #endif /* __BGPD_H__ */