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
|
/*
* BIRD -- Direct Device Routes
*
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
/**
* DOC: Direct
*
* The Direct protocol works by convering all ifa_notify() events it receives
* to rte_update() calls for the corresponding network.
*/
#undef LOCAL_DEBUG
#include "nest/bird.h"
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "nest/rt-dev.h"
#include "conf/conf.h"
#include "lib/resource.h"
#include "lib/string.h"
static void
dev_ifa_notify(struct proto *p, unsigned c, struct ifa *ad)
{
struct rt_dev_config *P = (void *) p->cf;
if (!EMPTY_LIST(P->iface_list) &&
!iface_patt_match(&P->iface_list, ad->iface))
/* Empty list is automagically treated as "*" */
return;
if (c & IF_CHANGE_DOWN)
{
net *n;
DBG("dev_if_notify: %s:%I going down\n", ad->iface->name, ad->ip);
n = net_find(p->table, ad->prefix, ad->pxlen);
if (!n)
{
DBG("dev_if_notify: device shutdown: prefix not found\n");
return;
}
rte_update(p->table, n, p, NULL);
}
else if (c & IF_CHANGE_UP)
{
rta *a, A;
net *n;
rte *e;
DBG("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip);
bzero(&A, sizeof(A));
A.proto = p;
A.source = RTS_DEVICE;
A.scope = ad->scope;
A.cast = RTC_UNICAST;
A.dest = RTD_DEVICE;
A.iface = ad->iface;
A.eattrs = NULL;
a = rta_lookup(&A);
n = net_get(p->table, ad->prefix, ad->pxlen);
e = rte_get_temp(a);
e->net = n;
e->pflags = 0;
rte_update(p->table, n, p, e);
}
}
static struct proto *
dev_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto));
p->ifa_notify = dev_ifa_notify;
p->min_scope = SCOPE_HOST;
return p;
}
static int
dev_reconfigure(struct proto *p, struct proto_config *new)
{
struct rt_dev_config *o = (struct rt_dev_config *) p->cf;
struct rt_dev_config *n = (struct rt_dev_config *) new;
return iface_patts_equal(&o->iface_list, &n->iface_list, NULL);
}
struct protocol proto_device = {
name: "Direct",
template: "direct%d",
init: dev_init,
reconfigure: dev_reconfigure
};
|
