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
|
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "netifd.h"
#include "system.h"
struct vlan_device {
struct device dev;
struct device_user dep;
device_state_cb set_state;
int id;
};
static void free_vlan_if(struct device *iface)
{
struct vlan_device *vldev;
vldev = container_of(iface, struct vlan_device, dev);
remove_device_user(&vldev->dep);
cleanup_device(&vldev->dev);
free(vldev);
}
static int vlan_set_device_state(struct device *dev, bool up)
{
struct vlan_device *vldev;
int ret = 0;
vldev = container_of(dev, struct vlan_device, dev);
if (!up) {
vldev->set_state(dev, false);
system_vlan_del(dev);
release_device(vldev->dep.dev);
return 0;
}
ret = claim_device(vldev->dep.dev);
if (ret)
return ret;
system_vlan_add(vldev->dep.dev, vldev->id);
ret = vldev->set_state(dev, true);
if (ret)
release_device(vldev->dep.dev);
return ret;
}
static void vlan_dev_cb(struct device_user *dep, enum device_event ev)
{
struct vlan_device *vldev;
vldev = container_of(dep, struct vlan_device, dep);
switch(ev) {
case DEV_EVENT_ADD:
set_device_present(&vldev->dev, true);
break;
case DEV_EVENT_REMOVE:
set_device_present(&vldev->dev, false);
break;
default:
break;
}
}
static struct device *get_vlan_device(struct device *dev, int id, bool create)
{
static const struct device_type vlan_type = {
.name = "VLAN",
.free = free_vlan_if,
};
struct vlan_device *vldev;
struct device_user *dep;
/* look for an existing interface before creating a new one */
list_for_each_entry(dep, &dev->users, list) {
if (dep->cb != vlan_dev_cb)
continue;
vldev = container_of(dep, struct vlan_device, dep);
if (vldev->id != id)
continue;
return &vldev->dev;
}
if (!create)
return NULL;
vldev = calloc(1, sizeof(*vldev));
snprintf(vldev->dev.ifname, IFNAMSIZ, "%s.%d", dev->ifname, id);
init_device(&vldev->dev, &vlan_type, NULL);
vldev->set_state = vldev->dev.set_state;
vldev->dev.set_state = vlan_set_device_state;
vldev->id = id;
vldev->dep.cb = vlan_dev_cb;
add_device_user(&vldev->dep, dev);
return &vldev->dev;
}
static inline char *split_vlan(char *s)
{
s = strchr(s, '.');
if (!s)
goto out;
*s = 0;
s++;
out:
return s;
}
struct device *get_vlan_device_chain(const char *ifname, bool create)
{
struct device *iface = NULL;
char *buf, *s, *next, *err = NULL;
int id;
buf = strdup(ifname);
if (!buf)
return NULL;
s = split_vlan(buf);
iface = get_device(buf, create);
if (!iface && !create)
goto error;
do {
next = split_vlan(s);
id = strtoul(s, &err, 10);
if (err && *err)
goto error;
iface = get_vlan_device(iface, id, create);
if (!iface)
goto error;
s = next;
if (!s)
goto out;
} while (1);
error:
iface = NULL;
out:
free(buf);
return iface;
}
|
