blob: 6c7c4b92e4f8ec0e5a2aad62b33a6ada0d813c0e [file] [log] [blame]
Samuel Ortiz89da1ec2007-07-02 22:54:18 -07001/*
2 * IrDA netlink layer, for stack configuration.
3 *
Samuel Ortiz22e1fb22007-07-21 19:06:53 -07004 * Copyright (c) 2007 Samuel Ortiz <samuel@sortiz.org>
Samuel Ortiz89da1ec2007-07-02 22:54:18 -07005 *
6 * Partly based on the 802.11 nelink implementation
7 * (see net/wireless/nl80211.c) which is:
8 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16#include <linux/socket.h>
17#include <linux/irda.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090018#include <linux/gfp.h>
Eric W. Biederman881d9662007-09-17 11:56:21 -070019#include <net/net_namespace.h>
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070020#include <net/sock.h>
21#include <net/irda/irda.h>
22#include <net/irda/irlap.h>
23#include <net/genetlink.h>
24
25
26
27static struct genl_family irda_nl_family = {
28 .id = GENL_ID_GENERATE,
29 .name = IRDA_NL_NAME,
30 .hdrsize = 0,
31 .version = IRDA_NL_VERSION,
32 .maxattr = IRDA_NL_CMD_MAX,
33};
34
Eric W. Biederman881d9662007-09-17 11:56:21 -070035static struct net_device * ifname_to_netdev(struct net *net, struct genl_info *info)
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070036{
37 char * ifname;
38
39 if (!info->attrs[IRDA_NL_ATTR_IFNAME])
40 return NULL;
41
42 ifname = nla_data(info->attrs[IRDA_NL_ATTR_IFNAME]);
43
Harvey Harrison0dc47872008-03-05 20:47:47 -080044 IRDA_DEBUG(5, "%s(): Looking for %s\n", __func__, ifname);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070045
Eric W. Biederman881d9662007-09-17 11:56:21 -070046 return dev_get_by_name(net, ifname);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070047}
48
49static int irda_nl_set_mode(struct sk_buff *skb, struct genl_info *info)
50{
51 struct net_device * dev;
52 struct irlap_cb * irlap;
53 u32 mode;
54
55 if (!info->attrs[IRDA_NL_ATTR_MODE])
56 return -EINVAL;
57
58 mode = nla_get_u32(info->attrs[IRDA_NL_ATTR_MODE]);
59
Harvey Harrison0dc47872008-03-05 20:47:47 -080060 IRDA_DEBUG(5, "%s(): Switching to mode: %d\n", __func__, mode);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070061
Eric W. Biederman881d9662007-09-17 11:56:21 -070062 dev = ifname_to_netdev(&init_net, info);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070063 if (!dev)
64 return -ENODEV;
65
66 irlap = (struct irlap_cb *)dev->atalk_ptr;
67 if (!irlap) {
68 dev_put(dev);
69 return -ENODEV;
70 }
71
72 irlap->mode = mode;
73
74 dev_put(dev);
75
76 return 0;
77}
78
79static int irda_nl_get_mode(struct sk_buff *skb, struct genl_info *info)
80{
81 struct net_device * dev;
82 struct irlap_cb * irlap;
83 struct sk_buff *msg;
84 void *hdr;
85 int ret = -ENOBUFS;
86
Eric W. Biederman881d9662007-09-17 11:56:21 -070087 dev = ifname_to_netdev(&init_net, info);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070088 if (!dev)
89 return -ENODEV;
90
Pablo Neira Ayusofd2120c2009-05-19 15:27:55 -070091 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -070092 if (!msg) {
93 dev_put(dev);
94 return -ENOMEM;
95 }
96
97 irlap = (struct irlap_cb *)dev->atalk_ptr;
98 if (!irlap) {
99 ret = -ENODEV;
100 goto err_out;
101 }
102
103 hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq,
104 &irda_nl_family, 0, IRDA_NL_CMD_GET_MODE);
Julius Volz07035fc2008-07-08 03:07:43 -0700105 if (hdr == NULL) {
106 ret = -EMSGSIZE;
Samuel Ortiz89da1ec2007-07-02 22:54:18 -0700107 goto err_out;
108 }
109
110 if(nla_put_string(msg, IRDA_NL_ATTR_IFNAME,
Andy Whitcroft22117ea2007-08-21 21:23:39 -0700111 dev->name))
Samuel Ortiz89da1ec2007-07-02 22:54:18 -0700112 goto err_out;
113
114 if(nla_put_u32(msg, IRDA_NL_ATTR_MODE, irlap->mode))
115 goto err_out;
116
117 genlmsg_end(msg, hdr);
118
Johannes Berg134e6372009-07-10 09:51:34 +0000119 return genlmsg_reply(msg, info);
Samuel Ortiz89da1ec2007-07-02 22:54:18 -0700120
121 err_out:
122 nlmsg_free(msg);
123 dev_put(dev);
124
125 return ret;
126}
127
Alexey Dobriyanb54452b2010-02-18 08:14:31 +0000128static const struct nla_policy irda_nl_policy[IRDA_NL_ATTR_MAX + 1] = {
Samuel Ortiz89da1ec2007-07-02 22:54:18 -0700129 [IRDA_NL_ATTR_IFNAME] = { .type = NLA_NUL_STRING,
130 .len = IFNAMSIZ-1 },
131 [IRDA_NL_ATTR_MODE] = { .type = NLA_U32 },
132};
133
134static struct genl_ops irda_nl_ops[] = {
135 {
136 .cmd = IRDA_NL_CMD_SET_MODE,
137 .doit = irda_nl_set_mode,
138 .policy = irda_nl_policy,
139 .flags = GENL_ADMIN_PERM,
140 },
141 {
142 .cmd = IRDA_NL_CMD_GET_MODE,
143 .doit = irda_nl_get_mode,
144 .policy = irda_nl_policy,
145 /* can be retrieved by unprivileged users */
146 },
147
148};
149
150int irda_nl_register(void)
151{
Michał Mirosław502664e2009-05-21 10:34:04 +0000152 return genl_register_family_with_ops(&irda_nl_family,
153 irda_nl_ops, ARRAY_SIZE(irda_nl_ops));
Samuel Ortiz89da1ec2007-07-02 22:54:18 -0700154}
155
156void irda_nl_unregister(void)
157{
158 genl_unregister_family(&irda_nl_family);
159}