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#ifndef _BIRD_BFD_H_
#define _BIRD_BFD_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_config
{
struct proto_config c;
list neighbors; /* List of struct bfd_neighbor */
};
struct bfd_session_config
{
u32 min_rx_int;
u32 min_tx_int;
u32 idle_tx_int;
u8 multiplier;
u8 multihop;
u8 passive;
};
struct bfd_neighbor
{
node n;
ip_addr addr;
ip_addr local;
struct iface *iface;
struct bfd_session_config *opts;
struct bfd_session *session;
};
struct bfd_proto
{
struct proto p;
slab *session_slab;
HASH(struct bfd_session) session_hash_id;
HASH(struct bfd_session) session_hash_ip;
list sockets;
};
struct bfd_socket
{
node n;
sock *sk;
u32 uc;
};
struct bfd_session
{
node n;
struct bfd_session *next_id; /* Next in bfd.session_hash_id */
struct bfd_session *next_ip; /* Next in bfd.session_hash_ip */
u8 opened;
u8 poll_active;
u8 poll_scheduled;
u8 loc_state;
u8 rem_state;
u8 loc_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 */
xxx_time last_tx; /* Time of last sent periodic control packet */
xxx_time 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 */
};
#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
#endif _BIRD_BFD_H_
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