diff options
Diffstat (limited to 'proto/bgp/bgp.h')
| -rw-r--r-- | proto/bgp/bgp.h | 53 |
1 files changed, 49 insertions, 4 deletions
diff --git a/proto/bgp/bgp.h b/proto/bgp/bgp.h index aaa2c4ac..5c180cce 100644 --- a/proto/bgp/bgp.h +++ b/proto/bgp/bgp.h @@ -47,12 +47,13 @@ struct bgp_conn { 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; int error_flag; /* Error state, ignore all input */ - int primary; /* This connection is primary */ u32 advertised_as; /* Temporary value for AS number received */ + int as4_support; /* Peer supports 4B AS numbers [RFC4893] */ unsigned hold_time, keepalive_time; /* Times calculated from my and neighbor's requirements */ }; @@ -60,8 +61,8 @@ 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_support; /* Peer supports 4B AS numbers [RFC4893] */ 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 */ @@ -75,13 +76,17 @@ struct bgp_proto { 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 */ + 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/* Prefixes to be sent */ list bucket_queue; /* Queue of buckets to send */ struct bgp_bucket *withdraw_bucket; /* Withdrawn routes */ unsigned startup_delay; /* Time to delay protocol startup by due to errors */ - bird_clock_t last_connect; /* Time of last connect attempt */ + 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; @@ -118,6 +123,12 @@ 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 @@ -147,8 +158,10 @@ inline static void bgp_attach_attr_ip(struct ea_list **to, struct linpool *pool, /* 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 */ @@ -186,7 +199,7 @@ void bgp_log_error(struct bgp_proto *p, char *msg, unsigned code, unsigned subco #define BA_AS4_PATH 0x11 /* [RFC4893] */ #define BA_AS4_AGGREGATOR 0x12 -/* BGP states */ +/* BGP connection states */ #define BS_IDLE 0 #define BS_CONNECT 1 /* Attempting to connect */ @@ -194,6 +207,38 @@ void bgp_log_error(struct bgp_proto *p, char *msg, unsigned code, unsigned subco #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 */ |