-/* BGP-4 Finite State Machine
+/* BGP-4 Finite State Machine
* From RFC1771 [A Border Gateway Protocol 4 (BGP-4)]
* Copyright (C) 1998 Kunihiro Ishiguro
*
#define _QUAGGA_BGP_FSM_H
/* Macro for BGP read, write and timer thread. */
-#define BGP_READ_ON(T,F,V) \
- do { \
- if ((peer->status != Deleted)) \
- thread_add_read (bm->master,(F),peer,(V),&(T)); \
- } while (0)
-
-#define BGP_READ_OFF(T) \
- do { \
- if (T) \
- THREAD_READ_OFF(T); \
- } while (0)
-
-#define BGP_WRITE_ON(T,F,V) \
- do { \
- if ((peer)->status != Deleted) \
- thread_add_write (bm->master,(F),(peer),(V),&(T)); \
- } while (0)
-
-#define BGP_PEER_WRITE_ON(T,F,V, peer) \
- do { \
- if ((peer)->status != Deleted) \
- thread_add_write (bm->master,(F),(peer),(V),&(T)); \
- } while (0)
-
-#define BGP_WRITE_OFF(T) \
- do { \
- if (T) \
- THREAD_WRITE_OFF(T); \
- } while (0)
-
-#define BGP_TIMER_ON(T,F,V) \
- do { \
- if ((peer->status != Deleted)) \
- thread_add_timer (bm->master,(F),peer,(V),&(T)); \
- } while (0)
-
-#define BGP_TIMER_OFF(T) \
- do { \
- if (T) \
- THREAD_TIMER_OFF(T); \
- } while (0)
-
-#define BGP_EVENT_ADD(P,E) \
- do { \
- if ((P)->status != Deleted) \
- thread_add_event (bm->master, bgp_event, (P), (E), NULL); \
- } while (0)
-
-#define BGP_EVENT_FLUSH(P) \
- do { \
- assert (peer); \
- thread_cancel_event (bm->master, (P)); \
- } while (0)
+#define BGP_TIMER_ON(T, F, V) \
+ do { \
+ if ((peer->status != Deleted)) \
+ thread_add_timer(bm->master, (F), peer, (V), &(T)); \
+ } while (0)
+
+#define BGP_TIMER_OFF(T) \
+ do { \
+ if (T) \
+ THREAD_TIMER_OFF(T); \
+ } while (0)
+
+#define BGP_EVENT_ADD(P, E) \
+ do { \
+ if ((P)->status != Deleted) \
+ thread_add_event(bm->master, bgp_event, (P), (E), \
+ NULL); \
+ } while (0)
+
+#define BGP_EVENT_FLUSH(P) \
+ do { \
+ assert(peer); \
+ thread_cancel_event(bm->master, (P)); \
+ } while (0)
#define BGP_MSEC_JITTER 10
+/* Status codes for bgp_event_update() */
+#define FSM_PEER_NOOP 0
+#define FSM_PEER_STOPPED 1
+#define FSM_PEER_TRANSFERRED 2
+#define FSM_PEER_TRANSITIONED 3
+
+#define BGP_PEER_GR_HELPER_ENABLE(peer) \
+ do { \
+ UNSET_FLAG( \
+ peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_RESTART); \
+ SET_FLAG( \
+ peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_HELPER);\
+ } while (0)
+
+#define BGP_PEER_GR_ENABLE(peer)\
+ do { \
+ SET_FLAG( \
+ peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_RESTART); \
+ UNSET_FLAG( \
+ peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_HELPER);\
+ } while (0)
+
+#define BGP_PEER_GR_DISABLE(peer)\
+ do { \
+ UNSET_FLAG( \
+ peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_RESTART);\
+ UNSET_FLAG(\
+ peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_HELPER);\
+ } while (0)
+
+#define BGP_PEER_GR_GLOBAL_INHERIT_SET(peer) \
+ SET_FLAG(peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT)
+
+#define BGP_PEER_GR_GLOBAL_INHERIT_UNSET(peer) \
+ UNSET_FLAG(peer->peer_gr_new_status_flag, \
+ PEER_GRACEFUL_RESTART_NEW_STATE_INHERIT)
+
+#define BGP_PEER_GRACEFUL_RESTART_CAPABLE(peer) \
+ (CHECK_FLAG(peer->cap, PEER_CAP_RESTART_ADV) && \
+ CHECK_FLAG(peer->cap, PEER_CAP_RESTART_RCV))
+
+#define BGP_PEER_RESTARTING_MODE(peer)\
+ (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART) && \
+ CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_ADV) && \
+ !CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV))
+
+#define BGP_PEER_HELPER_MODE(peer)\
+ (CHECK_FLAG(peer->flags, PEER_FLAG_GRACEFUL_RESTART_HELPER) && \
+ CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_RCV) && \
+ !CHECK_FLAG(peer->cap, PEER_CAP_RESTART_BIT_ADV))
+
/* Prototypes. */
-extern void bgp_fsm_nht_update(struct peer *, int valid);
-extern int bgp_event (struct thread *);
-extern int bgp_event_update (struct peer *, int event);
-extern int bgp_stop (struct peer *peer);
-extern void bgp_timer_set (struct peer *);
-extern int bgp_routeadv_timer (struct thread *);
-extern void bgp_fsm_change_status (struct peer *peer, int status);
-extern const char *peer_down_str[];
-extern void bgp_update_delay_end (struct bgp *);
-extern void bgp_maxmed_update (struct bgp *);
-extern int bgp_maxmed_onstartup_configured (struct bgp *);
-extern int bgp_maxmed_onstartup_active (struct bgp *);
+extern void bgp_fsm_event_update(struct peer *peer, int valid);
+extern int bgp_event(struct thread *);
+extern int bgp_event_update(struct peer *, int event);
+extern int bgp_stop(struct peer *peer);
+extern void bgp_timer_set(struct peer *);
+extern int bgp_routeadv_timer(struct thread *);
+extern void bgp_fsm_change_status(struct peer *peer, int status);
+extern const char *const peer_down_str[];
+extern void bgp_update_delay_end(struct bgp *);
+extern void bgp_maxmed_update(struct bgp *);
+extern int bgp_maxmed_onstartup_configured(struct bgp *);
+extern int bgp_maxmed_onstartup_active(struct bgp *);
/**
* Start the route advertisement timer (that honors MRAI) for all the
* peers. Typically called at the end of initial convergence, coming
* out of read-only mode.
*/
-extern void bgp_start_routeadv (struct bgp *);
+extern void bgp_start_routeadv(struct bgp *);
/**
* See if the route advertisement timer needs to be adjusted for a
* timer to expire to send the new set of prefixes. It should fire
* instantly and updates should go out sooner.
*/
-extern void bgp_adjust_routeadv (struct peer *);
+extern void bgp_adjust_routeadv(struct peer *);
#include "hook.h"
DECLARE_HOOK(peer_backward_transition, (struct peer *peer), (peer))
DECLARE_HOOK(peer_established, (struct peer *peer), (peer))
+int bgp_gr_update_all(struct bgp *bgp, int global_gr_cmd);
+int bgp_neighbor_graceful_restart(struct peer *peer,
+ int peer_gr_cmd);
+unsigned int bgp_peer_gr_action(struct peer *peer,
+ int old_peer_state, int new_peer_state);
+void bgp_peer_move_to_gr_mode(struct peer *peer, int new_state);
+unsigned int bgp_peer_gr_helper_enable(struct peer *peer);
+unsigned int bgp_peer_gr_enable(struct peer *peer);
+unsigned int bgp_peer_gr_global_inherit(struct peer *peer);
+unsigned int bgp_peer_gr_disable(struct peer *peer);
+enum peer_mode bgp_peer_gr_mode_get(struct peer *peer);
+enum global_mode bgp_global_gr_mode_get(struct bgp *bgp);
+enum peer_mode bgp_get_peer_gr_mode_from_flags(struct peer *peer);
+unsigned int bgp_peer_gr_global_inherit_unset(struct peer *peer);
+int bgp_gr_lookup_n_update_all_peer(struct bgp *bgp,
+ enum global_mode global_new_state,
+ enum global_mode global_old_state);
+void bgp_peer_gr_flags_update(struct peer *peer);
+const char *print_peer_gr_mode(enum peer_mode pr_mode);
+const char *print_peer_gr_cmd(enum peer_gr_command pr_gr_cmd);
+const char *print_global_gr_mode(enum global_mode gl_mode);
+const char *print_global_gr_cmd(enum global_gr_command gl_gr_cmd);
#endif /* _QUAGGA_BGP_FSM_H */
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