[thirdparty/bird.git] / proto / bgp / bgp.h

/*
 *	BIRD -- The Border Gateway Protocol
 *
 *	(c) 2000 Martin Mares <mj@ucw.cz>
 *
 *	Can be freely distributed and used under the terms of the GNU GPL.
 */

#ifndef _BIRD_BGP_H_
#define _BIRD_BGP_H_

#include "nest/route.h"

struct linpool;
struct eattr;

struct bgp_config {
  struct proto_config c;
  u32 local_as, remote_as;
  ip_addr remote_ip;
  int multihop;				/* Number of hops if multihop */
  ip_addr multihop_via;			/* Multihop: address to route to */
  ip_addr source_addr;			/* Source address to use */
  int next_hop_self;			/* Always set next hop to local IP address */
  int compare_path_lengths;		/* Use path lengths when selecting best route */
  u32 default_local_pref;		/* Default value for LOCAL_PREF attribute */
  u32 default_med;			/* Default value for MULTI_EXIT_DISC attribute */
  int capabilities;			/* Enable capability handshake [RFC3392] */
  int enable_as4;			/* Enable local support for 4B AS numbers [RFC4893] */
  u32 rr_cluster_id;			/* Route reflector cluster ID, if different from local ID */
  int rr_client;			/* Whether neighbor is RR client of me */
  int rs_client;			/* Whether neighbor is RS client of me */
  int advertise_ipv4;			/* Whether we should add IPv4 capability advertisement to OPEN message */
  unsigned connect_retry_time;
  unsigned hold_time, initial_hold_time;
  unsigned keepalive_time;
  unsigned start_delay_time;		/* Minimum delay between connects */
  unsigned error_amnesia_time;		/* Errors are forgotten after */
  unsigned error_delay_time_min;	/* Time to wait after an error is detected */
  unsigned error_delay_time_max;
  unsigned disable_after_error;		/* Disable the protocol when error is detected */
  char *password;			/* Password used for MD5 authentication */
};

struct bgp_conn {
  struct bgp_proto *bgp;
  struct birdsock *sk;
  unsigned int state;			/* State of connection state machine */
  struct timer *connect_retry_timer;
  struct timer *hold_timer;
  struct timer *keepalive_timer;
  struct event *tx_ev;
  int packets_to_send;			/* Bitmap of packet types to be sent */
  int notify_code, notify_subcode, notify_size;
  byte *notify_data;
  u32 advertised_as;			/* Temporary value for AS number received */
  int start_state;			/* protocol start_state snapshot when connection established */
  int want_as4_support;			/* Connection tries to establish AS4 session */
  int peer_as4_support;			/* Peer supports 4B AS numbers [RFC4893] */
  unsigned hold_time, keepalive_time;	/* Times calculated from my and neighbor's requirements */
};

struct bgp_proto {
  struct proto p;
  struct bgp_config *cf;		/* Shortcut to BGP configuration */
  u32 local_as, remote_as;
  int start_state;			/* Substates that partitions BS_START */
  int is_internal;			/* Internal BGP connection (local_as == remote_as) */
  int as4_session;			/* Session uses 4B AS numbers in AS_PATH (both sides support it) */
  u32 local_id;				/* BGP identifier of this router */
  u32 remote_id;			/* BGP identifier of the neighbor */
  u32 rr_cluster_id;			/* Route reflector cluster ID */
  int rr_client;			/* Whether neighbor is RR client of me */
  int rs_client;			/* Whether neighbor is RS client of me */
  struct bgp_conn *conn;		/* Connection we have established */
  struct bgp_conn outgoing_conn;	/* Outgoing connection we're working with */
  struct bgp_conn incoming_conn;	/* Incoming connection we have neither accepted nor rejected yet */
  struct object_lock *lock;		/* Lock for neighbor connection */
  ip_addr next_hop;			/* Either the peer or multihop_via */
  struct neighbor *neigh;		/* Neighbor entry corresponding to next_hop */
  ip_addr local_addr;			/* Address of the local end of the link to next_hop */
  ip_addr source_addr;			/* Address used as advertised next hop, usually local_addr */
  struct event *event;			/* Event for respawning and shutting process */
  struct bgp_bucket **bucket_hash;	/* Hash table of attribute buckets */
  unsigned int hash_size, hash_count, hash_limit;
  struct fib prefix_fib;		/* Prefixes to be sent */
  list bucket_queue;			/* Queue of buckets to send */
  struct bgp_bucket *withdraw_bucket;	/* Withdrawn routes */
  unsigned startup_delay;		/* Time to delay protocol startup by due to errors */
  bird_clock_t last_proto_error;	/* Time of last error that leads to protocol stop */
  u8 last_error_class; 			/* Error class of last error */
  u32 last_error_code;			/* Error code of last error. BGP protocol errors
					   are encoded as (bgp_err_code << 16 | bgp_err_subcode) */
#ifdef IPV6
  byte *mp_reach_start, *mp_unreach_start; /* Multiprotocol BGP attribute notes */
  unsigned mp_reach_len, mp_unreach_len;
  ip_addr local_link;			/* Link-level version of local_addr */
#endif
};

struct bgp_prefix {
  struct fib_node n;			/* Node in prefix fib */
  node bucket_node;			/* Node in per-bucket list */
};

struct bgp_bucket {
  node send_node;			/* Node in send queue */
  struct bgp_bucket *hash_next, *hash_prev;	/* Node in bucket hash table */
  unsigned hash;			/* Hash over extended attributes */
  list prefixes;			/* Prefixes in this buckets */
  ea_list eattrs[0];			/* Per-bucket extended attributes */
};

#define BGP_PORT		179
#define BGP_VERSION		4
#define BGP_HEADER_LENGTH	19
#define BGP_MAX_PACKET_LENGTH	4096
#define BGP_RX_BUFFER_SIZE	4096
#define BGP_TX_BUFFER_SIZE	BGP_MAX_PACKET_LENGTH

extern struct linpool *bgp_linpool;

extern int bgp_as4_support;


void bgp_start_timer(struct timer *t, int value);
void bgp_check(struct bgp_config *c);
void bgp_error(struct bgp_conn *c, unsigned code, unsigned subcode, byte *data, int len);
void bgp_close_conn(struct bgp_conn *c);
void bgp_update_startup_delay(struct bgp_proto *p, struct bgp_conn *conn, unsigned code, unsigned subcode);
void bgp_conn_enter_established_state(struct bgp_conn *conn);
void bgp_conn_enter_close_state(struct bgp_conn *conn);
void bgp_conn_enter_idle_state(struct bgp_conn *conn);
void bgp_store_error(struct bgp_proto *p, struct bgp_conn *c, u8 class, u32 code);


#ifdef LOCAL_DEBUG
#define BGP_FORCE_DEBUG 1
#else
#define BGP_FORCE_DEBUG 0
#endif
#define BGP_TRACE(flags, msg, args...) do { if ((p->p.debug & flags) || BGP_FORCE_DEBUG) \
	log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)

#define BGP_TRACE_RL(rl, flags, msg, args...) do { if ((p->p.debug & flags) || BGP_FORCE_DEBUG) \
	log_rl(rl, L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)


/* attrs.c */

void bgp_attach_attr(struct ea_list **to, struct linpool *pool, unsigned attr, uintptr_t val);
byte *bgp_attach_attr_wa(struct ea_list **to, struct linpool *pool, unsigned attr, unsigned len);
struct rta *bgp_decode_attrs(struct bgp_conn *conn, byte *a, unsigned int len, struct linpool *pool, int mandatory);
int bgp_get_attr(struct eattr *e, byte *buf, int buflen);
int bgp_rte_better(struct rte *, struct rte *);
void bgp_rt_notify(struct proto *, struct network *, struct rte *, struct rte *, struct ea_list *);
int bgp_import_control(struct proto *, struct rte **, struct ea_list **, struct linpool *);
void bgp_attr_init(struct bgp_proto *);
unsigned int bgp_encode_attrs(struct bgp_proto *p, byte *w, ea_list *attrs, int remains);
void bgp_free_bucket(struct bgp_proto *p, struct bgp_bucket *buck);
void bgp_get_route_info(struct rte *, byte *buf, struct ea_list *attrs);

inline static void bgp_attach_attr_ip(struct ea_list **to, struct linpool *pool, unsigned attr, ip_addr a)
{ *(ip_addr *) bgp_attach_attr_wa(to, pool, attr, sizeof(ip_addr)) = a; }

/* packets.c */

void bgp_schedule_packet(struct bgp_conn *conn, int type);
void bgp_kick_tx(void *vconn);
void bgp_tx(struct birdsock *sk);
int bgp_rx(struct birdsock *sk, int size);
const byte * bgp_error_dsc(byte *buff, unsigned code, unsigned subcode);
void bgp_log_error(struct bgp_proto *p, char *msg, unsigned code, unsigned subcode, byte *data, unsigned len);

/* Packet types */

#define PKT_OPEN		0x01
#define PKT_UPDATE		0x02
#define PKT_NOTIFICATION	0x03
#define PKT_KEEPALIVE		0x04
#define PKT_SCHEDULE_CLOSE	0x1f	/* Used internally to schedule socket close */

/* Attributes */

#define BAF_OPTIONAL		0x80
#define BAF_TRANSITIVE		0x40
#define BAF_PARTIAL		0x20
#define BAF_EXT_LEN		0x10

#define BA_ORIGIN		0x01	/* [RFC1771] */		/* WM */
#define BA_AS_PATH		0x02				/* WM */
#define BA_NEXT_HOP		0x03				/* WM */
#define BA_MULTI_EXIT_DISC	0x04				/* ON */
#define BA_LOCAL_PREF		0x05				/* WD */
#define BA_ATOMIC_AGGR		0x06				/* WD */
#define BA_AGGREGATOR		0x07				/* OT */
#define BA_COMMUNITY		0x08	/* [RFC1997] */		/* OT */
#define BA_ORIGINATOR_ID	0x09	/* [RFC1966] */		/* ON */
#define BA_CLUSTER_LIST		0x0a				/* ON */
/* We don't support these: */
#define BA_DPA			0x0b	/* ??? */
#define BA_ADVERTISER		0x0c	/* [RFC1863] */
#define BA_RCID_PATH		0x0d
#define BA_MP_REACH_NLRI	0x0e	/* [RFC2283] */
#define BA_MP_UNREACH_NLRI	0x0f
#define BA_EXTENDED_COMM	0x10	/* draft-ramachandra-bgp-ext-communities */
#define BA_AS4_PATH             0x11    /* [RFC4893] */
#define BA_AS4_AGGREGATOR       0x12

/* BGP connection states */

#define BS_IDLE			0
#define BS_CONNECT		1	/* Attempting to connect */
#define BS_ACTIVE		2	/* Waiting for connection retry & listening */
#define BS_OPENSENT		3
#define BS_OPENCONFIRM		4
#define BS_ESTABLISHED		5
#define BS_CLOSE		6	/* Used during transition to BS_IDLE */

/* BGP start states
 * 
 * Used in PS_START for fine-grained specification of starting state.
 *
 * When BGP protocol is started by core, it goes to BSS_PREPARE. When BGP protocol
 * done what is neccessary to start itself (like acquiring the lock), it goes to BSS_CONNECT.
 * When some connection attempt failed because of option or capability error, it goes to
 * BSS_CONNECT_NOCAP.
 */

#define BSS_PREPARE		0	/* Used before ordinary BGP started, i. e. waiting for lock */
#define BSS_CONNECT		1	/* Ordinary BGP connecting */
#define BSS_CONNECT_NOCAP	2	/* Legacy BGP connecting (without capabilities) */

/* Error classes */

#define BE_NONE			0
#define BE_MISC			1	/* Miscellaneous error */
#define BE_SOCKET		2	/* Socket error */
#define BE_BGP_RX		3	/* BGP protocol error notification received */
#define BE_BGP_TX		4	/* BGP protocol error notification sent */
#define BE_AUTO_DOWN		5	/* Automatic shutdown */
#define BE_MAN_DOWN		6	/* Manual shutdown */

/* Misc error codes */

#define BEM_NEIGHBOR_LOST	1
#define BEM_INVALID_NEXT_HOP	2
#define BEM_INVALID_MD5		3	/* MD5 authentication kernel request failed (possibly not supported */


/* Well-known communities */

#define BGP_COMM_NO_EXPORT		0xffffff01	/* Don't export outside local AS / confed. */
#define BGP_COMM_NO_ADVERTISE		0xffffff02	/* Don't export at all */
#define BGP_COMM_NO_EXPORT_SUBCONFED	0xffffff03	/* NO_EXPORT even in local confederation */

/* Origins */

#define ORIGIN_IGP		0
#define ORIGIN_EGP		1
#define ORIGIN_INCOMPLETE	2

/* Address families */

#define BGP_AF_IPV4		1
#define BGP_AF_IPV6		2

#endif
Commit	Line	Data
2638249d MM	1	/*
	2	* BIRD -- The Border Gateway Protocol
	3	*
	4	* (c) 2000 Martin Mares <mj@ucw.cz>
	5	*
	6	* Can be freely distributed and used under the terms of the GNU GPL.
	7	*/
	8
	9	#ifndef _BIRD_BGP_H_
	10	#define _BIRD_BGP_H_
	11
c2b28c99 MM	12	#include "nest/route.h"
c2b28c99 MM	13
c00d31be	14	struct linpool;
10be74da	15	struct eattr;
c00d31be	16
2638249d MM	17	struct bgp_config {
2638249d MM	18	struct proto_config c;
11cb6202	19	u32 local_as, remote_as;
2638249d MM	20	ip_addr remote_ip;
2638249d MM	21	int multihop; /* Number of hops if multihop */
c00d31be	22	ip_addr multihop_via; /* Multihop: address to route to */
8b258e4e	23	ip_addr source_addr; /* Source address to use */
48e842cc	24	int next_hop_self; /* Always set next hop to local IP address */
56a2bed4 MM	25	int compare_path_lengths; /* Use path lengths when selecting best route */
	26	u32 default_local_pref; /* Default value for LOCAL_PREF attribute */
	27	u32 default_med; /* Default value for MULTI_EXIT_DISC attribute */
e8ba557c	28	int capabilities; /* Enable capability handshake [RFC3392] */
ba5ed6f3	29	int enable_as4; /* Enable local support for 4B AS numbers [RFC4893] */
4847a894 OZ	30	u32 rr_cluster_id; /* Route reflector cluster ID, if different from local ID */
4847a894 OZ	31	int rr_client; /* Whether neighbor is RR client of me */
a92fe607	32	int rs_client; /* Whether neighbor is RS client of me */
e3299ab1	33	int advertise_ipv4; /* Whether we should add IPv4 capability advertisement to OPEN message */
3fdbafb6 MM	34	unsigned connect_retry_time;
	35	unsigned hold_time, initial_hold_time;
	36	unsigned keepalive_time;
6fd766c1 MM	37	unsigned start_delay_time; /* Minimum delay between connects */
	38	unsigned error_amnesia_time; /* Errors are forgotten after */
	39	unsigned error_delay_time_min; /* Time to wait after an error is detected */
	40	unsigned error_delay_time_max;
	41	unsigned disable_after_error; /* Disable the protocol when error is detected */
d51aa281	42	char password; / Password used for MD5 authentication */
c01e3741 MM	43	};
	44
	45	struct bgp_conn {
	46	struct bgp_proto *bgp;
	47	struct birdsock *sk;
72a6ef11	48	unsigned int state; /* State of connection state machine */
c01e3741 MM	49	struct timer *connect_retry_timer;
	50	struct timer *hold_timer;
	51	struct timer *keepalive_timer;
11b32d91	52	struct event *tx_ev;
3fdbafb6	53	int packets_to_send; /* Bitmap of packet types to be sent */
efcece2d MM	54	int notify_code, notify_subcode, notify_size;
efcece2d MM	55	byte *notify_data;
11cb6202	56	u32 advertised_as; /* Temporary value for AS number received */
165a6227 OZ	57	int start_state; /* protocol start_state snapshot when connection established */
	58	int want_as4_support; /* Connection tries to establish AS4 session */
	59	int peer_as4_support; /* Peer supports 4B AS numbers [RFC4893] */
3fdbafb6	60	unsigned hold_time, keepalive_time; /* Times calculated from my and neighbor's requirements */
2638249d MM	61	};
	62
	63	struct bgp_proto {
	64	struct proto p;
c01e3741	65	struct bgp_config cf; / Shortcut to BGP configuration */
11cb6202	66	u32 local_as, remote_as;
11b32d91	67	int start_state; /* Substates that partitions BS_START */
c01e3741	68	int is_internal; /* Internal BGP connection (local_as == remote_as) */
ba5ed6f3	69	int as4_session; /* Session uses 4B AS numbers in AS_PATH (both sides support it) */
c01e3741 MM	70	u32 local_id; /* BGP identifier of this router */
c01e3741 MM	71	u32 remote_id; /* BGP identifier of the neighbor */
4847a894 OZ	72	u32 rr_cluster_id; /* Route reflector cluster ID */
4847a894 OZ	73	int rr_client; /* Whether neighbor is RR client of me */
a92fe607	74	int rs_client; /* Whether neighbor is RS client of me */
b552ecc4 MM	75	struct bgp_conn conn; / Connection we have established */
b552ecc4 MM	76	struct bgp_conn outgoing_conn; /* Outgoing connection we're working with */
c01e3741 MM	77	struct bgp_conn incoming_conn; /* Incoming connection we have neither accepted nor rejected yet */
c01e3741 MM	78	struct object_lock lock; / Lock for neighbor connection */
48e842cc MM	79	ip_addr next_hop; /* Either the peer or multihop_via */
	80	struct neighbor neigh; / Neighbor entry corresponding to next_hop */
	81	ip_addr local_addr; /* Address of the local end of the link to next_hop */
ad440a57	82	ip_addr source_addr; /* Address used as advertised next hop, usually local_addr */
11b32d91	83	struct event event; / Event for respawning and shutting process */
c2b28c99	84	struct bgp_bucket *bucket_hash; / Hash table of attribute buckets */
ae8f5584	85	unsigned int hash_size, hash_count, hash_limit;
c2b28c99 MM	86	struct fib prefix_fib; /* Prefixes to be sent */
	87	list bucket_queue; /* Queue of buckets to send */
	88	struct bgp_bucket withdraw_bucket; / Withdrawn routes */
6fd766c1	89	unsigned startup_delay; /* Time to delay protocol startup by due to errors */
11b32d91 OZ	90	bird_clock_t last_proto_error; /* Time of last error that leads to protocol stop */
	91	u8 last_error_class; /* Error class of last error */
	92	u32 last_error_code; /* Error code of last error. BGP protocol errors
	93	are encoded as (bgp_err_code << 16 \| bgp_err_subcode) */
1c1da87b MM	94	#ifdef IPV6
	95	byte mp_reach_start, mp_unreach_start; /* Multiprotocol BGP attribute notes */
	96	unsigned mp_reach_len, mp_unreach_len;
11d4474c	97	ip_addr local_link; /* Link-level version of local_addr */
1c1da87b	98	#endif
c2b28c99 MM	99	};
	100
	101	struct bgp_prefix {
	102	struct fib_node n; /* Node in prefix fib */
	103	node bucket_node; /* Node in per-bucket list */
	104	};
	105
	106	struct bgp_bucket {
c2b28c99	107	node send_node; /* Node in send queue */
f421cfdd	108	struct bgp_bucket hash_next, hash_prev; /* Node in bucket hash table */
c2b28c99 MM	109	unsigned hash; /* Hash over extended attributes */
	110	list prefixes; /* Prefixes in this buckets */
	111	ea_list eattrs[0]; /* Per-bucket extended attributes */
2638249d MM	112	};
2638249d MM	113
72a6ef11 MM	114	#define BGP_PORT 179
	115	#define BGP_VERSION 4
	116	#define BGP_HEADER_LENGTH 19
	117	#define BGP_MAX_PACKET_LENGTH 4096
	118	#define BGP_RX_BUFFER_SIZE 4096
	119	#define BGP_TX_BUFFER_SIZE BGP_MAX_PACKET_LENGTH
2638249d	120
973399ae MM	121	extern struct linpool *bgp_linpool;
973399ae MM	122
11cb6202 OZ	123	extern int bgp_as4_support;
	124
	125
3fdbafb6	126	void bgp_start_timer(struct timer *t, int value);
2638249d	127	void bgp_check(struct bgp_config *c);
efcece2d	128	void bgp_error(struct bgp_conn c, unsigned code, unsigned subcode, byte data, int len);
b552ecc4	129	void bgp_close_conn(struct bgp_conn *c);
11b32d91 OZ	130	void bgp_update_startup_delay(struct bgp_proto p, struct bgp_conn conn, unsigned code, unsigned subcode);
	131	void bgp_conn_enter_established_state(struct bgp_conn *conn);
	132	void bgp_conn_enter_close_state(struct bgp_conn *conn);
	133	void bgp_conn_enter_idle_state(struct bgp_conn *conn);
	134	void bgp_store_error(struct bgp_proto p, struct bgp_conn c, u8 class, u32 code);
	135
2638249d	136
85368cd4 MM	137	#ifdef LOCAL_DEBUG
	138	#define BGP_FORCE_DEBUG 1
	139	#else
	140	#define BGP_FORCE_DEBUG 0
	141	#endif
	142	#define BGP_TRACE(flags, msg, args...) do { if ((p->p.debug & flags) \|\| BGP_FORCE_DEBUG) \
	143	log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
	144
cb530392 OZ	145	#define BGP_TRACE_RL(rl, flags, msg, args...) do { if ((p->p.debug & flags) \|\| BGP_FORCE_DEBUG) \
	146	log_rl(rl, L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
	147
	148
c01e3741 MM	149	/* attrs.c */
c01e3741 MM	150
4847a894 OZ	151	void bgp_attach_attr(struct ea_list *to, struct linpool pool, unsigned attr, uintptr_t val);
4847a894 OZ	152	byte bgp_attach_attr_wa(struct ea_list to, struct linpool pool, unsigned attr, unsigned len);
2a9e064d	153	struct rta bgp_decode_attrs(struct bgp_conn conn, byte a, unsigned int len, struct linpool pool, int mandatory);
aebe06b4	154	int bgp_get_attr(struct eattr e, byte buf, int buflen);
ef2c708d MM	155	int bgp_rte_better(struct rte , struct rte );
	156	void bgp_rt_notify(struct proto , struct network , struct rte , struct rte , struct ea_list *);
	157	int bgp_import_control(struct proto , struct rte , struct ea_list , struct linpool );
ae8f5584	158	void bgp_attr_init(struct bgp_proto *);
11cb6202	159	unsigned int bgp_encode_attrs(struct bgp_proto p, byte w, ea_list *attrs, int remains);
f421cfdd	160	void bgp_free_bucket(struct bgp_proto p, struct bgp_bucket buck);
5e88d730	161	void bgp_get_route_info(struct rte , byte buf, struct ea_list *attrs);
c00d31be	162
4847a894 OZ	163	inline static void bgp_attach_attr_ip(struct ea_list *to, struct linpool pool, unsigned attr, ip_addr a)
	164	{ (ip_addr ) bgp_attach_attr_wa(to, pool, attr, sizeof(ip_addr)) = a; }
	165
c01e3741 MM	166	/* packets.c */
c01e3741 MM	167
72a6ef11	168	void bgp_schedule_packet(struct bgp_conn *conn, int type);
11b32d91	169	void bgp_kick_tx(void *vconn);
72a6ef11 MM	170	void bgp_tx(struct birdsock *sk);
72a6ef11 MM	171	int bgp_rx(struct birdsock *sk, int size);
11b32d91	172	const byte * bgp_error_dsc(byte *buff, unsigned code, unsigned subcode);
efcece2d	173	void bgp_log_error(struct bgp_proto p, char msg, unsigned code, unsigned subcode, byte *data, unsigned len);
72a6ef11	174
c01e3741 MM	175	/* Packet types */
	176
	177	#define PKT_OPEN 0x01
	178	#define PKT_UPDATE 0x02
	179	#define PKT_NOTIFICATION 0x03
	180	#define PKT_KEEPALIVE 0x04
72a6ef11	181	#define PKT_SCHEDULE_CLOSE 0x1f /* Used internally to schedule socket close */
c01e3741 MM	182
	183	/* Attributes */
	184
	185	#define BAF_OPTIONAL 0x80
	186	#define BAF_TRANSITIVE 0x40
	187	#define BAF_PARTIAL 0x20
	188	#define BAF_EXT_LEN 0x10
	189
	190	#define BA_ORIGIN 0x01 /* [RFC1771] / / WM */
	191	#define BA_AS_PATH 0x02 /* WM */
	192	#define BA_NEXT_HOP 0x03 /* WM */
	193	#define BA_MULTI_EXIT_DISC 0x04 /* ON */
c00d31be	194	#define BA_LOCAL_PREF 0x05 /* WD */
c01e3741 MM	195	#define BA_ATOMIC_AGGR 0x06 /* WD */
	196	#define BA_AGGREGATOR 0x07 /* OT */
	197	#define BA_COMMUNITY 0x08 /* [RFC1997] / / OT */
	198	#define BA_ORIGINATOR_ID 0x09 /* [RFC1966] / / ON */
	199	#define BA_CLUSTER_LIST 0x0a /* ON */
	200	/* We don't support these: */
	201	#define BA_DPA 0x0b /* ??? */
	202	#define BA_ADVERTISER 0x0c /* [RFC1863] */
	203	#define BA_RCID_PATH 0x0d
	204	#define BA_MP_REACH_NLRI 0x0e /* [RFC2283] */
	205	#define BA_MP_UNREACH_NLRI 0x0f
	206	#define BA_EXTENDED_COMM 0x10 /* draft-ramachandra-bgp-ext-communities */
11cb6202 OZ	207	#define BA_AS4_PATH 0x11 /* [RFC4893] */
11cb6202 OZ	208	#define BA_AS4_AGGREGATOR 0x12
c01e3741	209
11b32d91	210	/* BGP connection states */
c01e3741 MM	211
	212	#define BS_IDLE 0
	213	#define BS_CONNECT 1 /* Attempting to connect */
	214	#define BS_ACTIVE 2 /* Waiting for connection retry & listening */
	215	#define BS_OPENSENT 3
	216	#define BS_OPENCONFIRM 4
	217	#define BS_ESTABLISHED 5
11b32d91 OZ	218	#define BS_CLOSE 6 /* Used during transition to BS_IDLE */
	219
	220	/* BGP start states
	221	*
	222	* Used in PS_START for fine-grained specification of starting state.
	223	*
	224	* When BGP protocol is started by core, it goes to BSS_PREPARE. When BGP protocol
	225	* done what is neccessary to start itself (like acquiring the lock), it goes to BSS_CONNECT.
	226	* When some connection attempt failed because of option or capability error, it goes to
	227	* BSS_CONNECT_NOCAP.
	228	*/
	229
	230	#define BSS_PREPARE 0 /* Used before ordinary BGP started, i. e. waiting for lock */
	231	#define BSS_CONNECT 1 /* Ordinary BGP connecting */
	232	#define BSS_CONNECT_NOCAP 2 /* Legacy BGP connecting (without capabilities) */
	233
	234	/* Error classes */
	235
	236	#define BE_NONE 0
	237	#define BE_MISC 1 /* Miscellaneous error */
	238	#define BE_SOCKET 2 /* Socket error */
	239	#define BE_BGP_RX 3 /* BGP protocol error notification received */
	240	#define BE_BGP_TX 4 /* BGP protocol error notification sent */
	241	#define BE_AUTO_DOWN 5 /* Automatic shutdown */
	242	#define BE_MAN_DOWN 6 /* Manual shutdown */
	243
	244	/* Misc error codes */
	245
	246	#define BEM_NEIGHBOR_LOST 1
	247	#define BEM_INVALID_NEXT_HOP 2
	248	#define BEM_INVALID_MD5 3 /* MD5 authentication kernel request failed (possibly not supported */
	249
c01e3741	250
bd2d8190 MM	251	/* Well-known communities */
	252
	253	#define BGP_COMM_NO_EXPORT 0xffffff01 /* Don't export outside local AS / confed. */
	254	#define BGP_COMM_NO_ADVERTISE 0xffffff02 /* Don't export at all */
	255	#define BGP_COMM_NO_EXPORT_SUBCONFED 0xffffff03 /* NO_EXPORT even in local confederation */
	256
cea63664 MM	257	/* Origins */
	258
	259	#define ORIGIN_IGP 0
	260	#define ORIGIN_EGP 1
	261	#define ORIGIN_INCOMPLETE 2
	262
1c1da87b MM	263	/* Address families */
1c1da87b MM	264
e3299ab1	265	#define BGP_AF_IPV4 1
1c1da87b MM	266	#define BGP_AF_IPV6 2
1c1da87b MM	267
2638249d	268	#endif