2 * BIRD -- The Border Gateway Protocol
4 * (c) 2000 Martin Mares <mj@ucw.cz>
5 * (c) 2008--2016 Ondrej Zajicek <santiago@crfreenet.org>
6 * (c) 2008--2016 CZ.NIC z.s.p.o.
8 * Can be freely distributed and used under the terms of the GNU GPL.
16 #include "nest/bird.h"
17 #include "nest/route.h"
19 //#include "lib/lists.h"
21 #include "lib/socket.h"
27 /* Address families */
29 #define BGP_AFI_IPV4 1
30 #define BGP_AFI_IPV6 2
32 #define BGP_SAFI_UNICAST 1
33 #define BGP_SAFI_MULTICAST 2
34 #define BGP_SAFI_FLOW 133
36 /* Internal AF codes */
38 #define BGP_AF(A, B) (((u32)(A) << 16) | (u32)(B))
39 #define BGP_AFI(A) ((u32)(A) >> 16)
40 #define BGP_SAFI(A) ((u32)(A) & 0xFFFF)
42 #define BGP_AF_IPV4 BGP_AF( BGP_AFI_IPV4, BGP_SAFI_UNICAST )
43 #define BGP_AF_IPV6 BGP_AF( BGP_AFI_IPV6, BGP_SAFI_UNICAST )
44 #define BGP_AF_IPV4_MC BGP_AF( BGP_AFI_IPV4, BGP_SAFI_MULTICAST )
45 #define BGP_AF_IPV6_MC BGP_AF( BGP_AFI_IPV6, BGP_SAFI_MULTICAST )
46 #define BGP_AF_FLOW4 BGP_AF( BGP_AFI_IPV4, BGP_SAFI_FLOW )
47 #define BGP_AF_FLOW6 BGP_AF( BGP_AFI_IPV6, BGP_SAFI_FLOW )
50 struct bgp_write_state
;
51 struct bgp_parse_state
;
52 struct bgp_export_state
;
59 uint (*encode_nlri
)(struct bgp_write_state
*s
, struct bgp_bucket
*buck
, byte
*buf
, uint size
);
60 void (*decode_nlri
)(struct bgp_parse_state
*s
, byte
*pos
, uint len
, rta
*a
);
61 void (*update_next_hop
)(struct bgp_export_state
*s
, eattr
*nh
, ea_list
**to
);
62 uint (*encode_next_hop
)(struct bgp_write_state
*s
, eattr
*nh
, byte
*buf
, uint size
);
63 void (*decode_next_hop
)(struct bgp_parse_state
*s
, byte
*pos
, uint len
, rta
*a
);
68 struct proto_config c
;
69 u32 local_as
, remote_as
;
70 ip_addr local_ip
; /* Source address to use */
72 struct iface
*iface
; /* Interface for link-local addresses */
73 u16 local_port
; /* Local listening port */
74 u16 remote_port
; /* Neighbor destination port */
75 int multihop
; /* Number of hops if multihop */
76 int strict_bind
; /* Bind listening socket to local address XXXX */
77 int ttl_security
; /* Enable TTL security [RFC 5082] */
78 int compare_path_lengths
; /* Use path lengths when selecting best route */
79 int med_metric
; /* Compare MULTI_EXIT_DISC even between routes from differen ASes */
80 int igp_metric
; /* Use IGP metrics when selecting best route */
81 int prefer_older
; /* Prefer older routes according to RFC 5004 */
82 int deterministic_med
; /* Use more complicated algo to have strict RFC 4271 MED comparison */
83 u32 default_local_pref
; /* Default value for LOCAL_PREF attribute */
84 u32 default_med
; /* Default value for MULTI_EXIT_DISC attribute */
85 int capabilities
; /* Enable capability handshake [RFC 3392] */
86 int enable_refresh
; /* Enable local support for route refresh [RFC 2918] */
87 int enable_as4
; /* Enable local support for 4B AS numbers [RFC 4893] */
88 int enable_extended_messages
; /* Enable local support for extended messages [draft] */
89 u32 rr_cluster_id
; /* Route reflector cluster ID, if different from local ID */
90 int rr_client
; /* Whether neighbor is RR client of me */
91 int rs_client
; /* Whether neighbor is RS client of me */
92 u32 confederation
; /* Confederation ID, or zero if confeds not active */
93 int confederation_member
; /* Whether neighbor AS is member of our confederation */
94 int passive
; /* Do not initiate outgoing connection */
95 int interpret_communities
; /* Hardwired handling of well-known communities */
96 int allow_local_as
; /* Allow that number of local ASNs in incoming AS_PATHs */
97 int gr_mode
; /* Graceful restart mode (BGP_GR_*) */
98 int setkey
; /* Set MD5 password to system SA/SP database */
99 unsigned gr_time
; /* Graceful restart timeout */
100 unsigned connect_delay_time
; /* Minimum delay between connect attempts */
101 unsigned connect_retry_time
; /* Timeout for connect attempts */
102 unsigned hold_time
, initial_hold_time
;
103 unsigned keepalive_time
;
104 unsigned error_amnesia_time
; /* Errors are forgotten after */
105 unsigned error_delay_time_min
; /* Time to wait after an error is detected */
106 unsigned error_delay_time_max
;
107 unsigned disable_after_error
; /* Disable the protocol when error is detected */
109 char *password
; /* Password used for MD5 authentication */
110 int check_link
; /* Use iface link state for liveness detection */
111 int bfd
; /* Use BFD for liveness detection */
114 struct bgp_channel_config
{
115 struct channel_config c
;
119 ip_addr next_hop_addr
; /* Local address for NEXT_HOP attribute */
120 u8 next_hop_self
; /* Always set next hop to local IP address */
121 u8 next_hop_keep
; /* Do not touch next hop attribute */
122 u8 missing_lladdr
; /* What we will do when we don' know link-local addr, see MLL_* */
123 u8 gw_mode
; /* How we compute route gateway from next_hop attr, see GW_* */
124 u8 secondary
; /* Accept also non-best routes (i.e. RA_ACCEPTED) */
125 u8 gr_able
; /* Allow full graceful restart for the channel */
126 u8 add_path
; /* Use ADD-PATH extension [RFC 7911] */
128 struct rtable_config
*igp_table
; /* Table used for recursive next hop lookups */
136 #define GW_RECURSIVE 2
138 #define BGP_ADD_PATH_RX 1
139 #define BGP_ADD_PATH_TX 2
140 #define BGP_ADD_PATH_FULL 3
142 #define BGP_GR_ABLE 1
143 #define BGP_GR_AWARE 2
145 /* For GR capability common flags */
146 #define BGP_GRF_RESTART 0x80
148 /* For GR capability per-AF flags */
149 #define BGP_GRF_FORWARDING 0x80
154 u8 ready
; /* Multiprotocol capability, RFC 4760 */
155 u8 gr_able
; /* Graceful restart support, RFC 4724 */
156 u8 gr_af_flags
; /* Graceful restart per-AF flags */
157 u8 add_path
; /* Multiple paths support, RFC 7911 */
161 u32 as4_number
; /* Announced ASN */
163 u8 as4_support
; /* Four-octet AS capability, RFC 6793 */
164 u8 ext_messages
; /* Extended message length, RFC draft */
165 u8 route_refresh
; /* Route refresh capability, RFC 2918 */
166 u8 enhanced_refresh
; /* Enhanced route refresh, RFC 7313 */
168 u8 gr_aware
; /* Graceful restart capability, RFC 4724 */
169 u8 gr_flags
; /* Graceful restart flags */
170 u16 gr_time
; /* Graceful restart time in seconds */
172 u16 af_count
; /* Number of af_data items */
174 struct bgp_af_caps af_data
[0]; /* Per-AF capability data */
177 #define WALK_AF_CAPS(caps,ac) \
178 for (ac = caps->af_data; ac < &caps->af_data[caps->af_count]; ac++)
182 node n
; /* Node in global bgp_sockets */
183 sock
*sk
; /* Real listening socket */
184 u32 uc
; /* Use count */
188 struct bgp_proto
*bgp
;
190 u8 state
; /* State of connection state machine */
191 u8 as4_session
; /* Session uses 4B AS numbers in AS_PATH (both sides support it) */
192 u8 ext_messages
; /* Session uses extended message length */
194 struct bgp_caps
*local_caps
;
195 struct bgp_caps
*remote_caps
;
196 struct timer
*connect_timer
;
197 struct timer
*hold_timer
;
198 struct timer
*keepalive_timer
;
200 u32 packets_to_send
; /* Bitmap of packet types to be sent */
201 u32 channels_to_send
; /* Bitmap of channels with packets to be sent */
202 u8 last_channel
; /* Channel used last time for TX */
203 u8 last_channel_count
; /* Number of times the last channel was used in succession */
204 int notify_code
, notify_subcode
, notify_size
;
207 uint hold_time
, keepalive_time
; /* Times calculated from my and neighbor's requirements */
212 struct bgp_config
*cf
; /* Shortcut to BGP configuration */
213 u32 local_as
, remote_as
;
214 u32 public_as
; /* Externally visible ASN (local_as or confederation id) */
215 u32 local_id
; /* BGP identifier of this router */
216 u32 remote_id
; /* BGP identifier of the neighbor */
217 u32 rr_cluster_id
; /* Route reflector cluster ID */
218 int start_state
; /* Substates that partitions BS_START */
219 u8 is_internal
; /* Internal BGP session (local_as == remote_as) */
220 u8 is_interior
; /* Internal or intra-confederation BGP session */
221 u8 as4_session
; /* Session uses 4B AS numbers in AS_PATH (both sides support it) */
222 u8 rr_client
; /* Whether neighbor is RR client of me */
223 u8 rs_client
; /* Whether neighbor is RS client of me */
224 u8 route_refresh
; /* Route refresh allowed to send [RFC 2918] */
225 u8 enhanced_refresh
; /* Enhanced refresh is negotiated [RFC 7313] */
226 u8 gr_ready
; /* Neighbor could do graceful restart */
227 u8 gr_active_num
; /* Neighbor is doing GR, number of active channels */
228 u8 channel_count
; /* Number of active channels */
229 u32
*afi_map
; /* Map channel index -> AFI */
230 struct bgp_channel
**channel_map
; /* Map channel index -> channel */
231 struct bgp_conn
*conn
; /* Connection we have established */
232 struct bgp_conn outgoing_conn
; /* Outgoing connection we're working with */
233 struct bgp_conn incoming_conn
; /* Incoming connection we have neither accepted nor rejected yet */
234 struct object_lock
*lock
; /* Lock for neighbor connection */
235 struct neighbor
*neigh
; /* Neighbor entry corresponding to remote ip, NULL if multihop */
236 struct bgp_socket
*sock
; /* Shared listening socket */
237 struct bfd_request
*bfd_req
; /* BFD request, if BFD is used */
238 ip_addr source_addr
; /* Local address used as an advertised next hop */
239 ip_addr link_addr
; /* Link-local version of source_addr */
240 struct event
*event
; /* Event for respawning and shutting process */
241 struct timer
*startup_timer
; /* Timer used to delay protocol startup due to previous errors (startup_delay) */
242 struct timer
*gr_timer
; /* Timer waiting for reestablishment after graceful restart */
243 unsigned startup_delay
; /* Time to delay protocol startup by due to errors */
244 bird_clock_t last_proto_error
; /* Time of last error that leads to protocol stop */
245 u8 last_error_class
; /* Error class of last error */
246 u32 last_error_code
; /* Error code of last error. BGP protocol errors
247 are encoded as (bgp_err_code << 16 | bgp_err_subcode) */
253 /* Rest are BGP specific data */
254 struct bgp_channel_config
*cf
;
255 pool
*pool
; /* XXXX */
259 const struct bgp_af_desc
*desc
;
261 HASH(struct bgp_bucket
) bucket_hash
; /* Hash table of route buckets */
262 struct bgp_bucket
*withdraw_bucket
; /* Withdrawn routes */
263 list bucket_queue
; /* Queue of buckets to send (struct bgp_bucket) */
265 HASH(struct bgp_prefix
) prefix_hash
; /* Prefixes to be sent */
266 slab
*prefix_slab
; /* Slab holding prefix nodes */
268 rtable
*igp_table
; /* Table used for recursive next hop lookups */
269 ip_addr next_hop_addr
; /* Local address for NEXT_HOP attribute */
270 ip_addr link_addr
; /* Link-local version of next_hop_addr */
272 u32 packets_to_send
; /* Bitmap of packet types to be sent */
274 u8 gr_ready
; /* Neighbor could do GR on this AF */
275 u8 gr_active
; /* Neighbor is doing GR and keeping fwd state */
277 u8 add_path_rx
; /* Session expects receive of ADD-PATH extended NLRI */
278 u8 add_path_tx
; /* Session expects transmit of ADD-PATH extended NLRI */
280 u8 feed_state
; /* Feed state (TX) for EoR, RR packets, see BFS_* */
281 u8 load_state
; /* Load state (RX) for EoR, RR packets, see BFS_* */
285 node buck_node
; /* Node in per-bucket list */
286 struct bgp_prefix
*next
; /* Node in prefix hash table */
293 node send_node
; /* Node in send queue */
294 struct bgp_bucket
*next
; /* Node in bucket hash table */
295 list prefixes
; /* Prefixes in this bucket (struct bgp_prefix) */
296 u32 hash
; /* Hash over extended attributes */
297 ea_list eattrs
[0]; /* Per-bucket extended attributes */
300 struct bgp_export_state
{
301 struct bgp_proto
*proto
;
302 struct bgp_channel
*channel
;
303 struct linpool
*pool
;
305 struct bgp_proto
*src
;
312 struct bgp_write_state
{
313 struct bgp_proto
*proto
;
314 struct bgp_channel
*channel
;
315 struct linpool
*pool
;
323 struct bgp_parse_state
{
324 struct bgp_proto
*proto
;
325 struct bgp_channel
*channel
;
326 struct linpool
*pool
;
331 u32 attrs_seen
[256/32];
339 uint ip_next_hop_len
;
342 uint mp_next_hop_len
;
346 byte
*ip_unreach_nlri
;
347 byte
*ip_next_hop_data
;
349 byte
*mp_unreach_nlri
;
350 byte
*mp_next_hop_data
;
356 /* Cached state for bgp_rte_update() */
358 struct rte_src
*last_src
;
363 #define BGP_VERSION 4
364 #define BGP_HEADER_LENGTH 19
365 #define BGP_MAX_MESSAGE_LENGTH 4096
366 #define BGP_MAX_EXT_MSG_LENGTH 65535
367 #define BGP_RX_BUFFER_SIZE 4096
368 #define BGP_TX_BUFFER_SIZE 4096
369 #define BGP_RX_BUFFER_EXT_SIZE 65535
370 #define BGP_TX_BUFFER_EXT_SIZE 65535
372 static inline int bgp_channel_is_ipv4(struct bgp_channel
*c
)
373 { return BGP_AFI(c
->afi
) == BGP_AFI_IPV4
; }
375 static inline int bgp_channel_is_ipv6(struct bgp_channel
*c
)
376 { return BGP_AFI(c
->afi
) == BGP_AFI_IPV6
; }
378 static inline uint
bgp_max_packet_length(struct bgp_conn
*conn
)
379 { return conn
->ext_messages
? BGP_MAX_EXT_MSG_LENGTH
: BGP_MAX_MESSAGE_LENGTH
; }
382 bgp_parse_error(struct bgp_parse_state
*s
, uint subcode
)
384 s
->err_subcode
= subcode
;
385 longjmp(s
->err_jmpbuf
, 1);
388 extern struct linpool
*bgp_linpool
;
391 void bgp_start_timer(struct timer
*t
, int value
);
392 void bgp_check_config(struct bgp_config
*c
);
393 void bgp_error(struct bgp_conn
*c
, unsigned code
, unsigned subcode
, byte
*data
, int len
);
394 void bgp_close_conn(struct bgp_conn
*c
);
395 void bgp_update_startup_delay(struct bgp_proto
*p
);
396 void bgp_conn_enter_openconfirm_state(struct bgp_conn
*conn
);
397 void bgp_conn_enter_established_state(struct bgp_conn
*conn
);
398 void bgp_conn_enter_close_state(struct bgp_conn
*conn
);
399 void bgp_conn_enter_idle_state(struct bgp_conn
*conn
);
400 void bgp_handle_graceful_restart(struct bgp_proto
*p
);
401 void bgp_graceful_restart_done(struct bgp_channel
*c
);
402 void bgp_refresh_begin(struct bgp_channel
*c
);
403 void bgp_refresh_end(struct bgp_channel
*c
);
404 void bgp_store_error(struct bgp_proto
*p
, struct bgp_conn
*c
, u8
class, u32 code
);
405 void bgp_stop(struct bgp_proto
*p
, unsigned subcode
);
407 struct rte_source
*bgp_find_source(struct bgp_proto
*p
, u32 path_id
);
408 struct rte_source
*bgp_get_source(struct bgp_proto
*p
, u32 path_id
);
413 #define BGP_FORCE_DEBUG 1
415 #define BGP_FORCE_DEBUG 0
417 #define BGP_TRACE(flags, msg, args...) do { if ((p->p.debug & flags) || BGP_FORCE_DEBUG) \
418 log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
420 #define BGP_TRACE_RL(rl, flags, msg, args...) do { if ((p->p.debug & flags) || BGP_FORCE_DEBUG) \
421 log_rl(rl, L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
426 static inline eattr
*
427 bgp_find_attr(ea_list
*attrs
, uint code
)
429 return ea_find(attrs
, EA_CODE(EAP_BGP
, code
));
433 bgp_set_attr(ea_list
**attrs
, struct linpool
*pool
, uint code
, uint flags
, uintptr_t val
);
436 bgp_set_attr_u32(ea_list
**to
, struct linpool
*pool
, uint code
, uint flags
, u32 val
)
437 { bgp_set_attr(to
, pool
, code
, flags
, (uintptr_t) val
); }
440 bgp_set_attr_ptr(ea_list
**to
, struct linpool
*pool
, uint code
, uint flags
, struct adata
*val
)
441 { bgp_set_attr(to
, pool
, code
, flags
, (uintptr_t) val
); }
444 bgp_set_attr_data(ea_list
**to
, struct linpool
*pool
, uint code
, uint flags
, void *data
, uint len
)
446 struct adata
*a
= lp_alloc_adata(pool
, len
);
447 memcpy(a
->data
, data
, len
);
448 bgp_set_attr(to
, pool
, code
, flags
, (uintptr_t) a
);
452 bgp_unset_attr(ea_list
**to
, struct linpool
*pool
, uint code
)
453 { eattr
*e
= bgp_set_attr(to
, pool
, code
, 0, 0); e
->type
= EAF_TYPE_UNDEF
; }
456 int bgp_encode_attrs(struct bgp_write_state
*s
, ea_list
*attrs
, byte
*buf
, byte
*end
);
457 ea_list
* bgp_decode_attrs(struct bgp_parse_state
*s
, byte
*data
, uint len
);
459 void bgp_init_bucket_table(struct bgp_channel
*c
);
460 void bgp_free_bucket(struct bgp_channel
*c
, struct bgp_bucket
*b
);
461 void bgp_defer_bucket(struct bgp_channel
*c
, struct bgp_bucket
*b
);
462 void bgp_withdraw_bucket(struct bgp_channel
*c
, struct bgp_bucket
*b
);
464 void bgp_init_prefix_table(struct bgp_channel
*c
);
465 void bgp_free_prefix(struct bgp_channel
*c
, struct bgp_prefix
*bp
);
467 int bgp_rte_better(struct rte
*, struct rte
*);
468 int bgp_rte_mergable(rte
*pri
, rte
*sec
);
469 int bgp_rte_recalculate(rtable
*table
, net
*net
, rte
*new, rte
*old
, rte
*old_best
);
470 void bgp_rt_notify(struct proto
*P
, struct channel
*C
, net
*n
, rte
*new, rte
*old
, ea_list
*attrs
);
471 int bgp_import_control(struct proto
*, struct rte
**, struct ea_list
**, struct linpool
*);
472 int bgp_get_attr(struct eattr
*e
, byte
*buf
, int buflen
);
473 void bgp_get_route_info(struct rte
*, byte
*buf
, struct ea_list
*attrs
);
478 void mrt_dump_bgp_state_change(struct bgp_conn
*conn
, unsigned old
, unsigned new);
479 const struct bgp_af_desc
*bgp_get_af_desc(u32 afi
);
480 const struct bgp_af_caps
*bgp_find_af_caps(struct bgp_caps
*caps
, u32 afi
);
481 void bgp_schedule_packet(struct bgp_conn
*conn
, struct bgp_channel
*c
, int type
);
482 void bgp_kick_tx(void *vconn
);
483 void bgp_tx(struct birdsock
*sk
);
484 int bgp_rx(struct birdsock
*sk
, uint size
);
485 const char * bgp_error_dsc(unsigned code
, unsigned subcode
);
486 void bgp_log_error(struct bgp_proto
*p
, u8
class, char *msg
, unsigned code
, unsigned subcode
, byte
*data
, unsigned len
);
488 void bgp_update_next_hop(struct bgp_export_state
*s
, eattr
*a
, ea_list
**to
);
493 #define PKT_OPEN 0x01
494 #define PKT_UPDATE 0x02
495 #define PKT_NOTIFICATION 0x03
496 #define PKT_KEEPALIVE 0x04
497 #define PKT_ROUTE_REFRESH 0x05 /* [RFC2918] */
498 #define PKT_BEGIN_REFRESH 0x1e /* Dummy type for BoRR packet [RFC7313] */
499 #define PKT_SCHEDULE_CLOSE 0x1f /* Used internally to schedule socket close */
503 #define BAF_OPTIONAL 0x80
504 #define BAF_TRANSITIVE 0x40
505 #define BAF_PARTIAL 0x20
506 #define BAF_EXT_LEN 0x10
508 #define BA_ORIGIN 0x01 /* [RFC1771] */ /* WM */
509 #define BA_AS_PATH 0x02 /* WM */
510 #define BA_NEXT_HOP 0x03 /* WM */
511 #define BA_MULTI_EXIT_DISC 0x04 /* ON */
512 #define BA_LOCAL_PREF 0x05 /* WD */
513 #define BA_ATOMIC_AGGR 0x06 /* WD */
514 #define BA_AGGREGATOR 0x07 /* OT */
515 #define BA_COMMUNITY 0x08 /* [RFC1997] */ /* OT */
516 #define BA_ORIGINATOR_ID 0x09 /* [RFC1966] */ /* ON */
517 #define BA_CLUSTER_LIST 0x0a /* ON */
518 /* We don't support these: */
519 #define BA_DPA 0x0b /* ??? */
520 #define BA_ADVERTISER 0x0c /* [RFC1863] */
521 #define BA_RCID_PATH 0x0d
522 #define BA_MP_REACH_NLRI 0x0e /* [RFC2283] */
523 #define BA_MP_UNREACH_NLRI 0x0f
524 #define BA_EXT_COMMUNITY 0x10 /* RFC 4360 */
525 #define BA_AS4_PATH 0x11 /* RFC 6793 */
526 #define BA_AS4_AGGREGATOR 0x12 /* RFC 6793 */
527 #define BA_LARGE_COMMUNITY 0x20 /* [draft-ietf-idr-large-community] */
529 /* BGP connection states */
532 #define BS_CONNECT 1 /* Attempting to connect */
533 #define BS_ACTIVE 2 /* Waiting for connection retry & listening */
534 #define BS_OPENSENT 3
535 #define BS_OPENCONFIRM 4
536 #define BS_ESTABLISHED 5
537 #define BS_CLOSE 6 /* Used during transition to BS_IDLE */
543 * Used in PS_START for fine-grained specification of starting state.
545 * When BGP protocol is started by core, it goes to BSS_PREPARE. When BGP
546 * protocol done what is neccessary to start itself (like acquiring the lock),
547 * it goes to BSS_CONNECT.
550 #define BSS_PREPARE 0 /* Used before ordinary BGP started, i. e. waiting for lock */
551 #define BSS_DELAY 1 /* Startup delay due to previous errors */
552 #define BSS_CONNECT 2 /* Ordinary BGP connecting */
555 /* BGP feed states (TX)
557 * RFC 4724 specifies that an initial feed should end with End-of-RIB mark.
559 * RFC 7313 specifies that a route refresh should be demarcated by BoRR and EoRR packets.
561 * These states (stored in c->feed_state) are used to keep track of these
562 * requirements. When such feed is started, BFS_LOADING / BFS_REFRESHING is
563 * set. When it ended, BFS_LOADED / BFS_REFRESHED is set to schedule End-of-RIB
564 * or EoRR packet. When the packet is sent, the state returned to BFS_NONE.
566 * Note that when a non-demarcated feed (e.g. plain RFC 4271 initial load
567 * without End-of-RIB or plain RFC 2918 route refresh without BoRR/EoRR
568 * demarcation) is active, BFS_NONE is set.
570 * BFS_NONE, BFS_LOADING and BFS_REFRESHING are also used as load states (RX)
571 * with correspondent semantics (-, expecting End-of-RIB, expecting EoRR).
574 #define BFS_NONE 0 /* No feed or original non-demarcated feed */
575 #define BFS_LOADING 1 /* Initial feed active, End-of-RIB planned */
576 #define BFS_LOADED 2 /* Loading done, End-of-RIB marker scheduled */
577 #define BFS_REFRESHING 3 /* Route refresh (introduced by BoRR) active */
578 #define BFS_REFRESHED 4 /* Refresh done, EoRR packet scheduled */
584 #define BE_MISC 1 /* Miscellaneous error */
585 #define BE_SOCKET 2 /* Socket error */
586 #define BE_BGP_RX 3 /* BGP protocol error notification received */
587 #define BE_BGP_TX 4 /* BGP protocol error notification sent */
588 #define BE_AUTO_DOWN 5 /* Automatic shutdown */
589 #define BE_MAN_DOWN 6 /* Manual shutdown */
591 /* Misc error codes */
593 #define BEM_NEIGHBOR_LOST 1
594 #define BEM_INVALID_NEXT_HOP 2
595 #define BEM_INVALID_MD5 3 /* MD5 authentication kernel request failed (possibly not supported) */
596 #define BEM_NO_SOCKET 4
597 #define BEM_LINK_DOWN 5
598 #define BEM_BFD_DOWN 6
599 #define BEM_GRACEFUL_RESTART 7
601 /* Automatic shutdown error codes */
603 #define BEA_ROUTE_LIMIT_EXCEEDED 1
605 /* Well-known communities */
607 #define BGP_COMM_NO_EXPORT 0xffffff01 /* Don't export outside local AS / confed. */
608 #define BGP_COMM_NO_ADVERTISE 0xffffff02 /* Don't export at all */
609 #define BGP_COMM_NO_EXPORT_SUBCONFED 0xffffff03 /* NO_EXPORT even in local confederation */
615 #define ORIGIN_INCOMPLETE 2