1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* BIRD -- OSPF
*
* (c) 1999 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "ospf.h"
static int
ospf_start(struct proto *p)
{
struct proto_ospf *po=(struct proto_ospf *)p;
DBG("%s: Start\n",p->name);
p->if_notify=ospf_if_notify;
p->rte_better=ospf_rte_better;
p->rte_same=ospf_rte_same;
fib_init(&po->efib,p->pool,sizeof(struct extfib),16,init_efib);
return PS_UP;
}
static void
ospf_dump(struct proto *p)
{
char areastr[20];
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct ospf_config *c = (void *) p->cf;
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_area *oa;
debug("%s: Area number: %d\n", p->name, po->areano);
WALK_LIST(ifa, po->iface_list)
{
debug("%s: Interface: %s\n", p->name, ifa->iface->name);
debug("%s: state: %u\n", p->name, ifa->state);
debug("%s: DR: %I\n", p->name, ifa->drid);
debug("%s: BDR: %I\n", p->name, ifa->bdrid);
WALK_LIST(n, ifa->neigh_list)
{
debug("%s: neighbor %I in state %u\n", p->name, n->rid, n->state);
}
}
WALK_LIST(NODE oa,po->area_list)
{
debug("\n%s: LSA graph dump for area \"%I\" start:\n", p->name,oa->areaid);
ospf_top_dump(oa->gr);
debug("%s: LSA graph dump for area \"%I\" finished\n\n", p->name,
oa->areaid);
}
neigh_dump_all();
}
static struct proto *
ospf_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto_ospf));
struct proto_ospf *po=(struct proto_ospf *)p;
debug("OSPF: Init requested.\n");
p->neigh_notify = NULL;
p->if_notify = NULL;
init_list(&(po->iface_list));
init_list(&(po->area_list));
p->import_control = ospf_import_control;
p->rt_notify = ospf_rt_notify;
return p;
}
/* If new is better return 1 */
static int
ospf_rte_better(struct rte *new, struct rte *old)
{
struct proto *p = new->attrs->proto;
if(new->u.ospf.metric1=LSINFINITY) return 0;
if(((new->attrs->source==RTS_OSPF) || (new->attrs->source==RTS_OSPF_IA))
&& (old->attrs->source==RTS_OSPF_EXT)) return 1;
if(((old->attrs->source==RTS_OSPF) || (old->attrs->source==RTS_OSPF_IA))
&& (new->attrs->source==RTS_OSPF_EXT)) return 0;
if(new->u.ospf.metric2!=0)
{
if(old->u.ospf.metric2==0) return 0;
if(new->u.ospf.metric2<old->u.ospf.metric2) return 1;
return 0;
}
else
{
if(old->u.ospf.metric2!=0) return 1;
if(new->u.ospf.metric1<old->u.ospf.metric1) return 1;
return 0;
}
}
static int
ospf_rte_same(struct rte *new, struct rte *old)
{
struct proto *p = new->attrs->proto;
if(new->attrs->source!=old->attrs->source) return 0;
if(new->u.ospf.metric1!=old->u.ospf.metric1) return 0;
if(new->u.ospf.metric2!=old->u.ospf.metric2) return 0;
return 1;
}
int
ospf_import_control(struct proto *p, rte **new, ea_list **attrs, struct linpool *pool)
{
rte *e=*new;
struct proto_ospf *po=(struct proto_ospf *)p;
if(p==e->attrs->proto) return -1;
return 0;
}
static int
ospf_shutdown(struct proto *p)
{
struct proto_ospf *po=(struct proto_ospf *)p;
struct ospf_iface *ifa;
struct ospf_neighbor *n;
struct ospf_area *oa;
debug("%s: Shutdown requested\n", p->name);
/* first of all flush my rt LSA */
WALK_LIST(oa,po->area_list)
{
net_flush_lsa(oa->rt,po,oa);
}
/* And send to all my neighbors 1WAY */
WALK_LIST(ifa, po->iface_list)
{
WALK_LIST(n, ifa->neigh_list) neigh_chstate(n,NEIGHBOR_DOWN);
hello_timer_hook(ifa->hello_timer);
}
return PS_DOWN;
}
void
ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old, ea_list *attrs)
{
struct proto_ospf *po=(struct proto_ospf *)p;
debug("%s: Got route %I/%d %s\n", p->name, n->n.prefix,
n->n.pxlen, new ? "up" : "down");
if(new) /* Got some new route */
{
originate_ext_lsa(n, old, po);
}
else
{
u32 rtid=po->proto.cf->global->router_id;
struct ospf_area *oa;
struct top_hash_entry *en;
/* Flush old external LSA */
WALK_LIST(oa, po->area_list)
{
if(en=ospf_hash_find(oa->gr, ipa_to_u32(n->n.prefix), rtid, LSA_T_EXT))
net_flush_lsa(en,po,oa);
}
}
}
static void
ospf_get_status(struct proto *p, byte *buf)
{
struct proto_ospf *po=(struct proto_ospf *)p;
if (p->proto_state == PS_DOWN) buf[0] = 0;
else
{
struct ospf_iface *ifa;
struct ospf_neighbor *n;
int adj=0;
WALK_LIST(ifa,po->iface_list)
WALK_LIST(n,ifa->neigh_list)
if(n->state==NEIGHBOR_FULL) adj=1;
if(adj==0) strcpy(buf, "Alone");
else strcpy(buf, "Running");
}
}
static void
ospf_get_route_info(rte *rte, byte *buf, ea_list *attrs)
{
char met=' ';
if(rte->u.ospf.type=='E') met='1';
if(rte->u.ospf.metric2!=0) met='2';
buf += bsprintf(buf, " %c%c %d", rte->u.ospf.type, met,
(rte->u.ospf.metric2==0) ? rte->u.ospf.metric1 : rte->u.ospf.metric2);
}
struct protocol proto_ospf = {
name: "OSPF",
template: "ospf%d",
init: ospf_init,
dump: ospf_dump,
start: ospf_start,
shutdown: ospf_shutdown,
get_route_info: ospf_get_route_info,
get_status: ospf_get_status
};
|
