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
|
/*
* IrDA netlink layer, for stack configuration.
*
* Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org>
*
* Partly based on the 802.11 nelink implementation
* (see net/wireless/nl80211.c) which is:
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/socket.h>
#include <linux/irda.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/irda/irda.h>
#include <net/irda/irlap.h>
#include <net/genetlink.h>
static struct genl_family irda_nl_family = {
.id = GENL_ID_GENERATE,
.name = IRDA_NL_NAME,
.hdrsize = 0,
.version = IRDA_NL_VERSION,
.maxattr = IRDA_NL_CMD_MAX,
};
static struct net_device * ifname_to_netdev(struct net *net, struct genl_info *info)
{
char * ifname;
if (!info->attrs[IRDA_NL_ATTR_IFNAME])
return NULL;
ifname = nla_data(info->attrs[IRDA_NL_ATTR_IFNAME]);
IRDA_DEBUG(5, "%s(): Looking for %s\n", __func__, ifname);
return dev_get_by_name(net, ifname);
}
static int irda_nl_set_mode(struct sk_buff *skb, struct genl_info *info)
{
struct net_device * dev;
struct irlap_cb * irlap;
u32 mode;
if (!info->attrs[IRDA_NL_ATTR_MODE])
return -EINVAL;
mode = nla_get_u32(info->attrs[IRDA_NL_ATTR_MODE]);
IRDA_DEBUG(5, "%s(): Switching to mode: %d\n", __func__, mode);
dev = ifname_to_netdev(&init_net, info);
if (!dev)
return -ENODEV;
irlap = (struct irlap_cb *)dev->atalk_ptr;
if (!irlap) {
dev_put(dev);
return -ENODEV;
}
irlap->mode = mode;
dev_put(dev);
return 0;
}
static int irda_nl_get_mode(struct sk_buff *skb, struct genl_info *info)
{
struct net_device * dev;
struct irlap_cb * irlap;
struct sk_buff *msg;
void *hdr;
int ret = -ENOBUFS;
dev = ifname_to_netdev(&init_net, info);
if (!dev)
return -ENODEV;
msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
if (!msg) {
dev_put(dev);
return -ENOMEM;
}
irlap = (struct irlap_cb *)dev->atalk_ptr;
if (!irlap) {
ret = -ENODEV;
goto err_out;
}
hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
&irda_nl_family, 0, IRDA_NL_CMD_GET_MODE);
if (IS_ERR(hdr)) {
ret = PTR_ERR(hdr);
goto err_out;
}
if(nla_put_string(msg, IRDA_NL_ATTR_IFNAME,
dev->name))
goto err_out;
if(nla_put_u32(msg, IRDA_NL_ATTR_MODE, irlap->mode))
goto err_out;
genlmsg_end(msg, hdr);
return genlmsg_unicast(msg, info->snd_pid);
err_out:
nlmsg_free(msg);
dev_put(dev);
return ret;
}
static struct nla_policy irda_nl_policy[IRDA_NL_ATTR_MAX + 1] = {
[IRDA_NL_ATTR_IFNAME] = { .type = NLA_NUL_STRING,
.len = IFNAMSIZ-1 },
[IRDA_NL_ATTR_MODE] = { .type = NLA_U32 },
};
static struct genl_ops irda_nl_ops[] = {
{
.cmd = IRDA_NL_CMD_SET_MODE,
.doit = irda_nl_set_mode,
.policy = irda_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = IRDA_NL_CMD_GET_MODE,
.doit = irda_nl_get_mode,
.policy = irda_nl_policy,
/* can be retrieved by unprivileged users */
},
};
int irda_nl_register(void)
{
int err, i;
err = genl_register_family(&irda_nl_family);
if (err)
return err;
for (i = 0; i < ARRAY_SIZE(irda_nl_ops); i++) {
err = genl_register_ops(&irda_nl_family, &irda_nl_ops[i]);
if (err)
goto err_out;
}
return 0;
err_out:
genl_unregister_family(&irda_nl_family);
return err;
}
void irda_nl_unregister(void)
{
genl_unregister_family(&irda_nl_family);
}
|
