1: /*
2: * Copyright (C) 2003 Yasuhiro Ohara
3: *
4: * This file is part of GNU Zebra.
5: *
6: * GNU Zebra is free software; you can redistribute it and/or modify it
7: * under the terms of the GNU General Public License as published by the
8: * Free Software Foundation; either version 2, or (at your option) any
9: * later version.
10: *
11: * GNU Zebra is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License for more details.
15: *
16: * You should have received a copy of the GNU General Public License
17: * along with GNU Zebra; see the file COPYING. If not, write to the
18: * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19: * Boston, MA 02111-1307, USA.
20: */
21:
22: #ifndef OSPF6_SPF_H
23: #define OSPF6_SPF_H
24:
25: #include "ospf6_top.h"
26:
27: /* Debug option */
28: extern unsigned char conf_debug_ospf6_spf;
29: #define OSPF6_DEBUG_SPF_PROCESS 0x01
30: #define OSPF6_DEBUG_SPF_TIME 0x02
31: #define OSPF6_DEBUG_SPF_DATABASE 0x04
32: #define OSPF6_DEBUG_SPF_ON(level) \
33: (conf_debug_ospf6_spf |= (level))
34: #define OSPF6_DEBUG_SPF_OFF(level) \
35: (conf_debug_ospf6_spf &= ~(level))
36: #define IS_OSPF6_DEBUG_SPF(level) \
37: (conf_debug_ospf6_spf & OSPF6_DEBUG_SPF_ ## level)
38:
39: /* Transit Vertex */
40: struct ospf6_vertex
41: {
42: /* type of this vertex */
43: u_int8_t type;
44:
45: /* Vertex Identifier */
46: struct prefix vertex_id;
47:
48: /* Identifier String */
49: char name[128];
50:
51: /* Associated Area */
52: struct ospf6_area *area;
53:
54: /* Associated LSA */
55: struct ospf6_lsa *lsa;
56:
57: /* Distance from Root (i.e. Cost) */
58: u_int32_t cost;
59:
60: /* Router hops to this node */
61: u_char hops;
62:
63: /* nexthops to this node */
64: struct ospf6_nexthop nexthop[OSPF6_MULTI_PATH_LIMIT];
65:
66: /* capability bits */
67: u_char capability;
68:
69: /* Optional capabilities */
70: u_char options[3];
71:
72: /* For tree display */
73: struct ospf6_vertex *parent;
74: struct list *child_list;
75: };
76:
77: #define OSPF6_VERTEX_TYPE_ROUTER 0x01
78: #define OSPF6_VERTEX_TYPE_NETWORK 0x02
79: #define VERTEX_IS_TYPE(t, v) \
80: ((v)->type == OSPF6_VERTEX_TYPE_ ## t ? 1 : 0)
81:
82: /* What triggered the SPF? */
83: #define OSPF6_SPF_FLAGS_ROUTER_LSA_ADDED (1 << 0)
84: #define OSPF6_SPF_FLAGS_ROUTER_LSA_REMOVED (1 << 1)
85: #define OSPF6_SPF_FLAGS_NETWORK_LSA_ADDED (1 << 2)
86: #define OSPF6_SPF_FLAGS_NETWORK_LSA_REMOVED (1 << 3)
87: #define OSPF6_SPF_FLAGS_LINK_LSA_ADDED (1 << 4)
88: #define OSPF6_SPF_FLAGS_LINK_LSA_REMOVED (1 << 5)
89: #define OSPF6_SPF_FLAGS_ROUTER_LSA_ORIGINATED (1 << 6)
90: #define OSPF6_SPF_FLAGS_NETWORK_LSA_ORIGINATED (1 << 7)
91:
92: static inline void
93: ospf6_set_spf_reason (struct ospf6* ospf, unsigned int reason)
94: {
95: ospf->spf_reason |= reason;
96: }
97:
98: static inline void
99: ospf6_reset_spf_reason (struct ospf6 *ospf)
100: {
101: ospf->spf_reason = 0;
102: }
103:
104: static inline unsigned int
105: ospf6_lsadd_to_spf_reason (struct ospf6_lsa *lsa)
106: {
107: unsigned int reason = 0;
108:
109: switch (ntohs (lsa->header->type))
110: {
111: case OSPF6_LSTYPE_ROUTER:
112: reason = OSPF6_SPF_FLAGS_ROUTER_LSA_ADDED;
113: break;
114: case OSPF6_LSTYPE_NETWORK:
115: reason = OSPF6_SPF_FLAGS_NETWORK_LSA_ADDED;
116: break;
117: case OSPF6_LSTYPE_LINK:
118: reason = OSPF6_SPF_FLAGS_LINK_LSA_ADDED;
119: break;
120: default:
121: break;
122: }
123: return (reason);
124: }
125:
126: static inline unsigned int
127: ospf6_lsremove_to_spf_reason (struct ospf6_lsa *lsa)
128: {
129: unsigned int reason = 0;
130:
131: switch (ntohs (lsa->header->type))
132: {
133: case OSPF6_LSTYPE_ROUTER:
134: reason = OSPF6_SPF_FLAGS_ROUTER_LSA_REMOVED;
135: break;
136: case OSPF6_LSTYPE_NETWORK:
137: reason = OSPF6_SPF_FLAGS_NETWORK_LSA_REMOVED;
138: break;
139: case OSPF6_LSTYPE_LINK:
140: reason = OSPF6_SPF_FLAGS_LINK_LSA_REMOVED;
141: break;
142: default:
143: break;
144: }
145: return (reason);
146: }
147:
148: extern void ospf6_spf_table_finish (struct ospf6_route_table *result_table);
149: extern void ospf6_spf_calculation (u_int32_t router_id,
150: struct ospf6_route_table *result_table,
151: struct ospf6_area *oa);
152: extern void ospf6_spf_schedule (struct ospf6 *ospf, unsigned int reason);
153:
154: extern void ospf6_spf_display_subtree (struct vty *vty, const char *prefix,
155: int rest, struct ospf6_vertex *v);
156:
157: extern void ospf6_spf_config_write (struct vty *vty);
158: extern int config_write_ospf6_debug_spf (struct vty *vty);
159: extern void install_element_ospf6_debug_spf (void);
160: extern void ospf6_spf_init (void);
161: extern void ospf6_spf_reason_string (unsigned int reason, char *buf, int size);
162:
163: #endif /* OSPF6_SPF_H */
164:
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