diff options
Diffstat (limited to 'proto/bfd/bfd.h')
| -rw-r--r-- | proto/bfd/bfd.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/proto/bfd/bfd.h b/proto/bfd/bfd.h new file mode 100644 index 00000000..9b61be64 --- /dev/null +++ b/proto/bfd/bfd.h @@ -0,0 +1,191 @@ +/* + * BIRD -- Bidirectional Forwarding Detection (BFD) + * + * Can be freely distributed and used under the terms of the GNU GPL. + */ + +#ifndef _BIRD_BFD_H_ +#define _BIRD_BFD_H_ + +#include <pthread.h> + +#include "nest/bird.h" +#include "nest/cli.h" +#include "nest/iface.h" +#include "nest/protocol.h" +#include "nest/route.h" +#include "conf/conf.h" +#include "lib/hash.h" +#include "lib/resource.h" +#include "lib/socket.h" +#include "lib/string.h" + +#include "nest/bfd.h" +#include "io.h" + + +#define BFD_CONTROL_PORT 3784 +#define BFD_ECHO_PORT 3785 +#define BFD_MULTI_CTL_PORT 4784 + +#define BFD_DEFAULT_MIN_RX_INT (10 MS_) +#define BFD_DEFAULT_MIN_TX_INT (100 MS_) +#define BFD_DEFAULT_IDLE_TX_INT (1 S_) +#define BFD_DEFAULT_MULTIPLIER 5 + + +struct bfd_iface_config; + +struct bfd_config +{ + struct proto_config c; + list patt_list; /* List of iface configs (struct bfd_iface_config) */ + list neigh_list; /* List of configured neighbors (struct bfd_neighbor) */ + struct bfd_iface_config *multihop; /* Multihop pseudoiface config */ +}; + +struct bfd_iface_config +{ + struct iface_patt i; + u32 min_rx_int; + u32 min_tx_int; + u32 idle_tx_int; + u8 multiplier; + u8 passive; +}; + +struct bfd_neighbor +{ + node n; + ip_addr addr; + ip_addr local; + struct iface *iface; + + struct neighbor *neigh; + struct bfd_request *req; + + u8 multihop; + u8 active; +}; + +struct bfd_proto +{ + struct proto p; + struct birdloop *loop; + pool *tpool; + pthread_spinlock_t lock; + node bfd_node; + + slab *session_slab; + HASH(struct bfd_session) session_hash_id; + HASH(struct bfd_session) session_hash_ip; + + sock *notify_rs; + sock *notify_ws; + list notify_list; + + sock *rx_1; + sock *rx_m; + list iface_list; +}; + +struct bfd_iface +{ + node n; + ip_addr local; + struct iface *iface; + struct bfd_iface_config *cf; + struct bfd_proto *bfd; + + sock *sk; + u32 uc; + u8 changed; +}; + +struct bfd_session +{ + node n; + ip_addr addr; /* Address of session */ + struct bfd_iface *ifa; /* Iface associated with session */ + struct bfd_session *next_id; /* Next in bfd.session_hash_id */ + struct bfd_session *next_ip; /* Next in bfd.session_hash_ip */ + + u8 opened_unused; + u8 passive; + u8 poll_active; + u8 poll_scheduled; + + u8 loc_state; + u8 rem_state; + u8 loc_diag; + u8 rem_diag; + u32 loc_id; /* Local session ID (local discriminator) */ + u32 rem_id; /* Remote session ID (remote discriminator) */ + u32 des_min_tx_int; /* Desired min rx interval, local option */ + u32 des_min_tx_new; /* Used for des_min_tx_int change */ + u32 req_min_rx_int; /* Required min tx interval, local option */ + u32 req_min_rx_new; /* Used for req_min_rx_int change */ + u32 rem_min_tx_int; /* Last received des_min_tx_int */ + u32 rem_min_rx_int; /* Last received req_min_rx_int */ + u8 demand_mode; /* Currently unused */ + u8 rem_demand_mode; + u8 detect_mult; /* Announced detect_mult, local option */ + u8 rem_detect_mult; /* Last received detect_mult */ + + btime last_tx; /* Time of last sent periodic control packet */ + btime last_rx; /* Time of last received valid control packet */ + + timer2 *tx_timer; /* Periodic control packet timer */ + timer2 *hold_timer; /* Timer for session down detection time */ + + list request_list; /* List of client requests (struct bfd_request) */ + bird_clock_t last_state_change; /* Time of last state change */ + u8 notify_running; /* 1 if notify hooks are running */ +}; + + +extern const char *bfd_state_names[]; + +#define BFD_STATE_ADMIN_DOWN 0 +#define BFD_STATE_DOWN 1 +#define BFD_STATE_INIT 2 +#define BFD_STATE_UP 3 + +#define BFD_DIAG_NOTHING 0 +#define BFD_DIAG_TIMEOUT 1 +#define BFD_DIAG_ECHO_FAILED 2 +#define BFD_DIAG_NEIGHBOR_DOWN 3 +#define BFD_DIAG_FWD_RESET 4 +#define BFD_DIAG_PATH_DOWN 5 +#define BFD_DIAG_C_PATH_DOWN 6 +#define BFD_DIAG_ADMIN_DOWN 7 +#define BFD_DIAG_RC_PATH_DOWN 8 + +#define BFD_POLL_TX 1 +#define BFD_POLL_RX 2 + +#define BFD_FLAGS 0x3f +#define BFD_FLAG_POLL (1 << 5) +#define BFD_FLAG_FINAL (1 << 4) +#define BFD_FLAG_CPI (1 << 3) +#define BFD_FLAG_AP (1 << 2) +#define BFD_FLAG_DEMAND (1 << 1) +#define BFD_FLAG_MULTIPOINT (1 << 0) + + +static inline void bfd_lock_sessions(struct bfd_proto *p) { pthread_spin_lock(&p->lock); } +static inline void bfd_unlock_sessions(struct bfd_proto *p) { pthread_spin_unlock(&p->lock); } + +/* bfd.c */ +struct bfd_session * bfd_find_session_by_id(struct bfd_proto *p, u32 id); +struct bfd_session * bfd_find_session_by_addr(struct bfd_proto *p, ip_addr addr); +void bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_tx_int, u32 old_rx_int); +void bfd_show_sessions(struct proto *P); + +/* packets.c */ +void bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final); +sock * bfd_open_rx_sk(struct bfd_proto *p, int multihop); +sock * bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa); + + +#endif /* _BIRD_BFD_H_ */ |