Annotation of embedaddon/bird/proto/bfd/bfd.h, revision 1.1
1.1 ! misho 1: /*
! 2: * BIRD -- Bidirectional Forwarding Detection (BFD)
! 3: *
! 4: * Can be freely distributed and used under the terms of the GNU GPL.
! 5: */
! 6:
! 7: #ifndef _BIRD_BFD_H_
! 8: #define _BIRD_BFD_H_
! 9:
! 10: #include <pthread.h>
! 11:
! 12: #include "nest/bird.h"
! 13: #include "nest/cli.h"
! 14: #include "nest/iface.h"
! 15: #include "nest/protocol.h"
! 16: #include "nest/route.h"
! 17: #include "nest/password.h"
! 18: #include "conf/conf.h"
! 19: #include "lib/hash.h"
! 20: #include "lib/resource.h"
! 21: #include "lib/socket.h"
! 22: #include "lib/string.h"
! 23:
! 24: #include "nest/bfd.h"
! 25: #include "io.h"
! 26:
! 27:
! 28: #define BFD_CONTROL_PORT 3784
! 29: #define BFD_ECHO_PORT 3785
! 30: #define BFD_MULTI_CTL_PORT 4784
! 31:
! 32: #define BFD_DEFAULT_MIN_RX_INT (10 MS_)
! 33: #define BFD_DEFAULT_MIN_TX_INT (100 MS_)
! 34: #define BFD_DEFAULT_IDLE_TX_INT (1 S_)
! 35: #define BFD_DEFAULT_MULTIPLIER 5
! 36:
! 37:
! 38: struct bfd_iface_config;
! 39:
! 40: struct bfd_config
! 41: {
! 42: struct proto_config c;
! 43: list patt_list; /* List of iface configs (struct bfd_iface_config) */
! 44: list neigh_list; /* List of configured neighbors (struct bfd_neighbor) */
! 45: struct bfd_iface_config *multihop; /* Multihop pseudoiface config */
! 46: };
! 47:
! 48: struct bfd_iface_config
! 49: {
! 50: struct iface_patt i;
! 51: u32 min_rx_int;
! 52: u32 min_tx_int;
! 53: u32 idle_tx_int;
! 54: u8 multiplier;
! 55: u8 passive;
! 56: u8 auth_type; /* Authentication type (BFD_AUTH_*) */
! 57: list *passwords; /* Passwords for authentication */
! 58: };
! 59:
! 60: struct bfd_neighbor
! 61: {
! 62: node n;
! 63: ip_addr addr;
! 64: ip_addr local;
! 65: struct iface *iface;
! 66:
! 67: struct neighbor *neigh;
! 68: struct bfd_request *req;
! 69:
! 70: u8 multihop;
! 71: u8 active;
! 72: };
! 73:
! 74: struct bfd_proto
! 75: {
! 76: struct proto p;
! 77: struct birdloop *loop;
! 78: pool *tpool;
! 79: pthread_spinlock_t lock;
! 80: node bfd_node;
! 81:
! 82: slab *session_slab;
! 83: HASH(struct bfd_session) session_hash_id;
! 84: HASH(struct bfd_session) session_hash_ip;
! 85:
! 86: sock *notify_rs;
! 87: sock *notify_ws;
! 88: list notify_list;
! 89:
! 90: sock *rx_1;
! 91: sock *rx_m;
! 92: list iface_list;
! 93: };
! 94:
! 95: struct bfd_iface
! 96: {
! 97: node n;
! 98: ip_addr local;
! 99: struct iface *iface;
! 100: struct bfd_iface_config *cf;
! 101: struct bfd_proto *bfd;
! 102:
! 103: sock *sk;
! 104: u32 uc;
! 105: u8 changed;
! 106: };
! 107:
! 108: struct bfd_session
! 109: {
! 110: node n;
! 111: ip_addr addr; /* Address of session */
! 112: struct bfd_iface *ifa; /* Iface associated with session */
! 113: struct bfd_session *next_id; /* Next in bfd.session_hash_id */
! 114: struct bfd_session *next_ip; /* Next in bfd.session_hash_ip */
! 115:
! 116: u8 opened_unused;
! 117: u8 passive;
! 118: u8 poll_active;
! 119: u8 poll_scheduled;
! 120:
! 121: u8 loc_state;
! 122: u8 rem_state;
! 123: u8 loc_diag;
! 124: u8 rem_diag;
! 125: u32 loc_id; /* Local session ID (local discriminator) */
! 126: u32 rem_id; /* Remote session ID (remote discriminator) */
! 127: u32 des_min_tx_int; /* Desired min rx interval, local option */
! 128: u32 des_min_tx_new; /* Used for des_min_tx_int change */
! 129: u32 req_min_rx_int; /* Required min tx interval, local option */
! 130: u32 req_min_rx_new; /* Used for req_min_rx_int change */
! 131: u32 rem_min_tx_int; /* Last received des_min_tx_int */
! 132: u32 rem_min_rx_int; /* Last received req_min_rx_int */
! 133: u8 demand_mode; /* Currently unused */
! 134: u8 rem_demand_mode;
! 135: u8 detect_mult; /* Announced detect_mult, local option */
! 136: u8 rem_detect_mult; /* Last received detect_mult */
! 137:
! 138: btime last_tx; /* Time of last sent periodic control packet */
! 139: btime last_rx; /* Time of last received valid control packet */
! 140:
! 141: timer2 *tx_timer; /* Periodic control packet timer */
! 142: timer2 *hold_timer; /* Timer for session down detection time */
! 143:
! 144: list request_list; /* List of client requests (struct bfd_request) */
! 145: bird_clock_t last_state_change; /* Time of last state change */
! 146: u8 notify_running; /* 1 if notify hooks are running */
! 147:
! 148: u8 rx_csn_known; /* Received crypto sequence number is known */
! 149: u32 rx_csn; /* Last received crypto sequence number */
! 150: u32 tx_csn; /* Last transmitted crypto sequence number */
! 151: u32 tx_csn_time; /* Timestamp of last tx_csn change */
! 152: };
! 153:
! 154:
! 155: extern const char *bfd_state_names[];
! 156:
! 157: #define BFD_STATE_ADMIN_DOWN 0
! 158: #define BFD_STATE_DOWN 1
! 159: #define BFD_STATE_INIT 2
! 160: #define BFD_STATE_UP 3
! 161:
! 162: #define BFD_DIAG_NOTHING 0
! 163: #define BFD_DIAG_TIMEOUT 1
! 164: #define BFD_DIAG_ECHO_FAILED 2
! 165: #define BFD_DIAG_NEIGHBOR_DOWN 3
! 166: #define BFD_DIAG_FWD_RESET 4
! 167: #define BFD_DIAG_PATH_DOWN 5
! 168: #define BFD_DIAG_C_PATH_DOWN 6
! 169: #define BFD_DIAG_ADMIN_DOWN 7
! 170: #define BFD_DIAG_RC_PATH_DOWN 8
! 171:
! 172: #define BFD_POLL_TX 1
! 173: #define BFD_POLL_RX 2
! 174:
! 175: #define BFD_FLAGS 0x3f
! 176: #define BFD_FLAG_POLL (1 << 5)
! 177: #define BFD_FLAG_FINAL (1 << 4)
! 178: #define BFD_FLAG_CPI (1 << 3)
! 179: #define BFD_FLAG_AP (1 << 2)
! 180: #define BFD_FLAG_DEMAND (1 << 1)
! 181: #define BFD_FLAG_MULTIPOINT (1 << 0)
! 182:
! 183: #define BFD_AUTH_NONE 0
! 184: #define BFD_AUTH_SIMPLE 1
! 185: #define BFD_AUTH_KEYED_MD5 2
! 186: #define BFD_AUTH_METICULOUS_KEYED_MD5 3
! 187: #define BFD_AUTH_KEYED_SHA1 4
! 188: #define BFD_AUTH_METICULOUS_KEYED_SHA1 5
! 189:
! 190: extern const u8 bfd_auth_type_to_hash_alg[];
! 191:
! 192:
! 193: static inline void bfd_lock_sessions(struct bfd_proto *p) { pthread_spin_lock(&p->lock); }
! 194: static inline void bfd_unlock_sessions(struct bfd_proto *p) { pthread_spin_unlock(&p->lock); }
! 195:
! 196: /* bfd.c */
! 197: struct bfd_session * bfd_find_session_by_id(struct bfd_proto *p, u32 id);
! 198: struct bfd_session * bfd_find_session_by_addr(struct bfd_proto *p, ip_addr addr);
! 199: void bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_tx_int, u32 old_rx_int);
! 200: void bfd_show_sessions(struct proto *P);
! 201:
! 202: /* packets.c */
! 203: void bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final);
! 204: sock * bfd_open_rx_sk(struct bfd_proto *p, int multihop);
! 205: sock * bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa);
! 206:
! 207:
! 208: #endif /* _BIRD_BFD_H_ */
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