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
|
/*
* BIRD -- Management of Interfaces
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "nest/bird.h"
#include "nest/iface.h"
#include "lib/resource.h"
list iface_list;
static pool *if_pool;
void
if_dump(struct iface *i)
{
struct ifa *a;
debug("IF%d: %s", i->index, i->name);
if (i->flags & IF_ADMIN_DOWN)
debug(" ADMIN-DOWN");
if (i->flags & IF_UP)
debug(" UP");
if (i->flags & IF_MULTIACCESS)
debug(" MA");
if (i->flags & IF_UNNUMBERED)
debug(" UNNUM");
if (i->flags & IF_BROADCAST)
debug(" BC");
if (i->flags & IF_MULTICAST)
debug(" MC");
if (i->flags & IF_TUNNEL)
debug(" TUNL");
if (i->flags & IF_LOOPBACK)
debug(" LOOP");
if (i->flags & IF_IGNORE)
debug(" IGN");
debug(" MTU=%d\n", i->mtu);
for(a=i->ifa; a; a=a->next)
debug("\t%08x, net %08x/%-2d bc %08x -> %08x\n", _I(a->ip), _I(a->prefix), a->pxlen, _I(a->brd), _I(a->opposite));
}
void
if_dump_all(void)
{
struct iface *i;
debug("Known network interfaces:\n\n");
WALK_LIST(i, iface_list)
if_dump(i);
debug("\n");
}
struct if_with_a {
struct iface i;
struct ifa a[0];
};
static struct iface *
if_copy(struct iface *j)
{
int len;
struct if_with_a *w;
struct iface *i;
struct ifa *a, **b, *c;
len = 0;
for(a=j->ifa; a; a=a->next)
len++;
w = mb_alloc(if_pool, sizeof(struct if_with_a) + len*sizeof(struct ifa));
i = &w->i;
c = w->a;
memcpy(i, j, sizeof(struct iface));
b = &i->ifa;
a = j->ifa;
while (a)
{
*b = c;
memcpy(c, a, sizeof(struct ifa));
b = &c->next;
a = a->next;
c++;
}
*b = NULL;
return i;
}
static inline void
if_free(struct iface *i)
{
mb_free(i);
}
static unsigned
if_changed(struct iface *i, struct iface *j)
{
unsigned f = 0;
struct ifa *x, *y;
x = i->ifa;
y = j->ifa;
while (x && y)
{
x = x->next;
y = y->next;
}
if (x || y)
f |= IF_CHANGE_ADDR;
if (i->mtu != j->mtu)
f |= IF_CHANGE_MTU;
if (i->flags != j->flags)
{
f |= IF_CHANGE_FLAGS;
if ((i->flags ^ j->flags) & IF_UP)
if (i->flags & IF_UP)
f |= IF_CHANGE_DOWN;
else
f |= IF_CHANGE_UP;
}
return f;
}
static void
if_notify_change(unsigned c, struct iface *old, struct iface *new)
{
debug("Interface change notification (%x) for %s\n", c, new->name);
}
void
if_update(struct iface *new)
{
struct iface *i;
WALK_LIST(i, iface_list)
if (!strcmp(new->name, i->name))
{
unsigned c = if_changed(i, new);
if (c)
{
struct iface *j = if_copy(new);
if_notify_change(c, i, j);
insert_node(&j->n, &i->n);
rem_node(&i->n);
if_free(i);
}
return;
}
i = if_copy(new);
add_tail(&iface_list, &i->n);
if_notify_change(IF_CHANGE_UP | IF_CHANGE_FLAGS | IF_CHANGE_MTU | IF_CHANGE_ADDR, NULL, i);
}
void
if_end_update(void)
{
struct iface *i, j;
WALK_LIST(i, iface_list)
if (i->flags & IF_UPDATED)
i->flags &= ~IF_UPDATED;
else
{
memcpy(&j, i, sizeof(struct iface));
i->flags = (i->flags & ~IF_UP) | IF_ADMIN_DOWN;
if_notify_change(IF_CHANGE_DOWN | IF_CHANGE_FLAGS, &j, i);
}
}
void
if_init(void)
{
if_pool = rp_new(&root_pool, "Interfaces");
init_list(&iface_list);
}
|
