| paul | 718e374 | 2002-12-13 20:15:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | * OSPF version 2 Interface State Machine. |
| 3 | * From RFC2328 [OSPF Version 2] |
| 4 | * Copyright (C) 1999 Toshiaki Takada |
| 5 | * |
| 6 | * This file is part of GNU Zebra. |
| 7 | * |
| 8 | * GNU Zebra is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2, or (at your option) any |
| 11 | * later version. |
| 12 | * |
| 13 | * GNU Zebra is distributed in the hope that it will be useful, but |
| 14 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with GNU Zebra; see the file COPYING. If not, write to the Free |
| 20 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
| 21 | * 02111-1307, USA. |
| 22 | */ |
| 23 | |
| 24 | #ifndef _ZEBRA_OSPF_ISM_H |
| 25 | #define _ZEBRA_OSPF_ISM_H |
| 26 | |
| 27 | /* OSPF Interface State Machine Status. */ |
| 28 | #define ISM_DependUpon 0 |
| 29 | #define ISM_Down 1 |
| 30 | #define ISM_Loopback 2 |
| 31 | #define ISM_Waiting 3 |
| 32 | #define ISM_PointToPoint 4 |
| 33 | #define ISM_DROther 5 |
| 34 | #define ISM_Backup 6 |
| 35 | #define ISM_DR 7 |
| 36 | #define OSPF_ISM_STATE_MAX 8 |
| 37 | |
| 38 | /* OSPF Interface State Machine Event. */ |
| 39 | #define ISM_NoEvent 0 |
| 40 | #define ISM_InterfaceUp 1 |
| 41 | #define ISM_WaitTimer 2 |
| 42 | #define ISM_BackupSeen 3 |
| 43 | #define ISM_NeighborChange 4 |
| 44 | #define ISM_LoopInd 5 |
| 45 | #define ISM_UnloopInd 6 |
| 46 | #define ISM_InterfaceDown 7 |
| 47 | #define OSPF_ISM_EVENT_MAX 8 |
| 48 | |
| 49 | #define OSPF_ISM_WRITE_ON() \ |
| 50 | do \ |
| 51 | { \ |
| 52 | if (oi->on_write_q == 0) \ |
| 53 | { \ |
| 54 | listnode_add (ospf_top->oi_write_q, oi); \ |
| 55 | oi->on_write_q = 1; \ |
| 56 | } \ |
| 57 | if (ospf_top->t_write == NULL) \ |
| 58 | ospf_top->t_write = \ |
| 59 | thread_add_write (master, ospf_write, ospf_top, ospf_top->fd); \ |
| 60 | } while (0) |
| 61 | |
| 62 | /* Macro for OSPF ISM timer turn on. */ |
| 63 | #define OSPF_ISM_TIMER_ON(T,F,V) \ |
| 64 | if (!(T)) \ |
| 65 | (T) = thread_add_timer (master, (F), oi, (V)) |
| 66 | |
| 67 | /* Macro for OSPF ISM timer turn off. */ |
| 68 | #define OSPF_ISM_TIMER_OFF(X) \ |
| 69 | if (X) \ |
| 70 | { \ |
| 71 | thread_cancel (X); \ |
| 72 | (X) = NULL; \ |
| 73 | } |
| 74 | |
| 75 | /* Macro for OSPF schedule event. */ |
| 76 | #define OSPF_ISM_EVENT_SCHEDULE(I,E) \ |
| 77 | thread_add_event (master, ospf_ism_event, (I), (E)) |
| 78 | |
| 79 | /* Macro for OSPF execute event. */ |
| 80 | #define OSPF_ISM_EVENT_EXECUTE(I,E) \ |
| 81 | thread_execute (master, ospf_ism_event, (I), (E)) |
| 82 | |
| 83 | /* Prototypes. */ |
| 84 | int ospf_ism_event (struct thread *); |
| 85 | void ism_change_status (struct ospf_interface *, int); |
| 86 | int ospf_hello_timer (struct thread *thread); |
| 87 | |
| 88 | #endif /* _ZEBRA_OSPF_ISM_H */ |