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
|
/*
* 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 converting 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_find(&P->iface_list, ad->iface, ad->iface->addr))
/* Empty list is automagically treated as "*" */
return;
if (ad->flags & IA_SECONDARY)
return;
if (ad->scope <= SCOPE_LINK)
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_ipa(p->table, ad->prefix, ad->pxlen);
if (!n)
{
DBG("dev_if_notify: device shutdown: prefix not found\n");
return;
}
/* Use iface ID as local source ID */
struct rte_src *src = rt_get_source(p, ad->iface->index);
rte_update2(p->main_ahook, n, NULL, src);
}
else if (c & IF_CHANGE_UP)
{
rta *a;
net *n;
rte *e;
DBG("dev_if_notify: %s:%I going up\n", ad->iface->name, ad->ip);
/* Use iface ID as local source ID */
struct rte_src *src = rt_get_source(p, ad->iface->index);
rta a0 = {
.src = src,
.source = RTS_DEVICE,
.scope = SCOPE_UNIVERSE,
.cast = RTC_UNICAST,
.dest = RTD_DEVICE,
.iface = ad->iface
};
a = rta_lookup(&a0);
n = net_get_ipa(p->table, ad->prefix, ad->pxlen);
e = rte_get_temp(a);
e->net = n;
e->pflags = 0;
rte_update2(p->main_ahook, n, e, src);
}
}
static struct proto *
dev_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto));
p->ifa_notify = dev_ifa_notify;
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);
}
static void
dev_copy_config(struct proto_config *dest, struct proto_config *src)
{
struct rt_dev_config *d = (struct rt_dev_config *) dest;
struct rt_dev_config *s = (struct rt_dev_config *) src;
/*
* We copy iface_list as ifaces can be shared by more direct protocols.
* Copy suffices to be is shallow, because new nodes can be added, but
* old nodes cannot be modified (although they contain internal lists).
*/
cfg_copy_list(&d->iface_list, &s->iface_list, sizeof(struct iface_patt));
}
struct protocol proto_device = {
.name = "Direct",
.template = "direct%d",
.preference = DEF_PREF_DIRECT,
.config_size = sizeof(struct rt_dev_config),
.init = dev_init,
.reconfigure = dev_reconfigure,
.copy_config = dev_copy_config
};
|
