Commit | Line | Data |
---|---|---|
1eaa9d03 DES |
1 | /* |
2 | * Netlink inteface for IEEE 802.15.4 stack | |
3 | * | |
4 | * Copyright 2007, 2008 Siemens AG | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | * | |
19 | * Written by: | |
20 | * Sergey Lapin <slapin@ossfans.org> | |
21 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | |
22 | * Maxim Osipov <maxim.osipov@siemens.com> | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <net/netlink.h> | |
27 | #include <net/genetlink.h> | |
28 | #include <net/wpan-phy.h> | |
bb1cafb8 DES |
29 | #include <net/af_ieee802154.h> |
30 | #include <net/ieee802154_netdev.h> | |
31 | #include <net/rtnetlink.h> /* for rtnl_{un,}lock */ | |
1eaa9d03 DES |
32 | #include <linux/nl802154.h> |
33 | ||
34 | #include "ieee802154.h" | |
35 | ||
36 | static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 pid, | |
37 | u32 seq, int flags, struct wpan_phy *phy) | |
38 | { | |
39 | void *hdr; | |
40 | int i, pages = 0; | |
41 | uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL); | |
42 | ||
43 | pr_debug("%s\n", __func__); | |
44 | ||
45 | if (!buf) | |
46 | goto out; | |
47 | ||
48 | hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags, | |
49 | IEEE802154_LIST_PHY); | |
50 | if (!hdr) | |
51 | goto out; | |
52 | ||
53 | mutex_lock(&phy->pib_lock); | |
54 | NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)); | |
55 | ||
56 | NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, phy->current_page); | |
57 | NLA_PUT_U8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel); | |
58 | for (i = 0; i < 32; i++) { | |
59 | if (phy->channels_supported[i]) | |
60 | buf[pages++] = phy->channels_supported[i] | (i << 27); | |
61 | } | |
62 | if (pages) | |
63 | NLA_PUT(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST, | |
64 | pages * sizeof(uint32_t), buf); | |
65 | ||
66 | mutex_unlock(&phy->pib_lock); | |
67 | return genlmsg_end(msg, hdr); | |
68 | ||
69 | nla_put_failure: | |
70 | mutex_unlock(&phy->pib_lock); | |
71 | genlmsg_cancel(msg, hdr); | |
72 | out: | |
73 | kfree(buf); | |
74 | return -EMSGSIZE; | |
75 | } | |
76 | ||
77 | static int ieee802154_list_phy(struct sk_buff *skb, | |
78 | struct genl_info *info) | |
79 | { | |
80 | /* Request for interface name, index, type, IEEE address, | |
81 | PAN Id, short address */ | |
82 | struct sk_buff *msg; | |
83 | struct wpan_phy *phy; | |
84 | const char *name; | |
85 | int rc = -ENOBUFS; | |
86 | ||
87 | pr_debug("%s\n", __func__); | |
88 | ||
89 | if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) | |
90 | return -EINVAL; | |
91 | ||
92 | name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
93 | if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') | |
94 | return -EINVAL; /* phy name should be null-terminated */ | |
95 | ||
96 | ||
97 | phy = wpan_phy_find(name); | |
98 | if (!phy) | |
99 | return -ENODEV; | |
100 | ||
101 | msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
102 | if (!msg) | |
103 | goto out_dev; | |
104 | ||
105 | rc = ieee802154_nl_fill_phy(msg, info->snd_pid, info->snd_seq, | |
106 | 0, phy); | |
107 | if (rc < 0) | |
108 | goto out_free; | |
109 | ||
110 | wpan_phy_put(phy); | |
111 | ||
112 | return genlmsg_reply(msg, info); | |
113 | out_free: | |
114 | nlmsg_free(msg); | |
115 | out_dev: | |
116 | wpan_phy_put(phy); | |
117 | return rc; | |
118 | ||
119 | } | |
120 | ||
121 | struct dump_phy_data { | |
122 | struct sk_buff *skb; | |
123 | struct netlink_callback *cb; | |
124 | int idx, s_idx; | |
125 | }; | |
126 | ||
127 | static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data) | |
128 | { | |
129 | int rc; | |
130 | struct dump_phy_data *data = _data; | |
131 | ||
132 | pr_debug("%s\n", __func__); | |
133 | ||
134 | if (data->idx++ < data->s_idx) | |
135 | return 0; | |
136 | ||
137 | rc = ieee802154_nl_fill_phy(data->skb, | |
138 | NETLINK_CB(data->cb->skb).pid, | |
139 | data->cb->nlh->nlmsg_seq, | |
140 | NLM_F_MULTI, | |
141 | phy); | |
142 | ||
143 | if (rc < 0) { | |
144 | data->idx--; | |
145 | return rc; | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int ieee802154_dump_phy(struct sk_buff *skb, | |
152 | struct netlink_callback *cb) | |
153 | { | |
154 | struct dump_phy_data data = { | |
155 | .cb = cb, | |
156 | .skb = skb, | |
157 | .s_idx = cb->args[0], | |
158 | .idx = 0, | |
159 | }; | |
160 | ||
161 | pr_debug("%s\n", __func__); | |
162 | ||
163 | wpan_phy_for_each(ieee802154_dump_phy_iter, &data); | |
164 | ||
165 | cb->args[0] = data.idx; | |
166 | ||
167 | return skb->len; | |
168 | } | |
169 | ||
bb1cafb8 DES |
170 | static int ieee802154_add_iface(struct sk_buff *skb, |
171 | struct genl_info *info) | |
172 | { | |
173 | struct sk_buff *msg; | |
174 | struct wpan_phy *phy; | |
175 | const char *name; | |
176 | const char *devname; | |
177 | int rc = -ENOBUFS; | |
178 | struct net_device *dev; | |
179 | ||
180 | pr_debug("%s\n", __func__); | |
181 | ||
182 | if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) | |
183 | return -EINVAL; | |
184 | ||
185 | name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
186 | if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') | |
187 | return -EINVAL; /* phy name should be null-terminated */ | |
188 | ||
189 | if (info->attrs[IEEE802154_ATTR_DEV_NAME]) { | |
190 | devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); | |
191 | if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] | |
192 | != '\0') | |
193 | return -EINVAL; /* phy name should be null-terminated */ | |
194 | } else { | |
195 | devname = "wpan%d"; | |
196 | } | |
197 | ||
198 | if (strlen(devname) >= IFNAMSIZ) | |
199 | return -ENAMETOOLONG; | |
200 | ||
201 | phy = wpan_phy_find(name); | |
202 | if (!phy) | |
203 | return -ENODEV; | |
204 | ||
205 | msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE); | |
206 | if (!msg) | |
207 | goto out_dev; | |
208 | ||
209 | if (!phy->add_iface) { | |
210 | rc = -EINVAL; | |
211 | goto nla_put_failure; | |
212 | } | |
213 | ||
214 | dev = phy->add_iface(phy, devname); | |
215 | if (IS_ERR(dev)) { | |
216 | rc = PTR_ERR(dev); | |
217 | goto nla_put_failure; | |
218 | } | |
219 | ||
220 | NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)); | |
221 | NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name); | |
222 | ||
223 | dev_put(dev); | |
224 | ||
225 | wpan_phy_put(phy); | |
226 | ||
227 | return ieee802154_nl_reply(msg, info); | |
228 | ||
229 | nla_put_failure: | |
230 | nlmsg_free(msg); | |
231 | out_dev: | |
232 | wpan_phy_put(phy); | |
233 | return rc; | |
234 | } | |
235 | ||
236 | static int ieee802154_del_iface(struct sk_buff *skb, | |
237 | struct genl_info *info) | |
238 | { | |
239 | struct sk_buff *msg; | |
240 | struct wpan_phy *phy; | |
241 | const char *name; | |
242 | int rc; | |
243 | struct net_device *dev; | |
244 | ||
245 | pr_debug("%s\n", __func__); | |
246 | ||
247 | if (!info->attrs[IEEE802154_ATTR_DEV_NAME]) | |
248 | return -EINVAL; | |
249 | ||
250 | name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); | |
251 | if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0') | |
252 | return -EINVAL; /* name should be null-terminated */ | |
253 | ||
254 | dev = dev_get_by_name(genl_info_net(info), name); | |
255 | if (!dev) | |
256 | return -ENODEV; | |
257 | ||
258 | phy = ieee802154_mlme_ops(dev)->get_phy(dev); | |
259 | BUG_ON(!phy); | |
260 | ||
261 | rc = -EINVAL; | |
262 | /* phy name is optional, but should be checked if it's given */ | |
263 | if (info->attrs[IEEE802154_ATTR_PHY_NAME]) { | |
264 | struct wpan_phy *phy2; | |
265 | ||
266 | const char *pname = | |
267 | nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
268 | if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] | |
269 | != '\0') | |
270 | /* name should be null-terminated */ | |
271 | goto out_dev; | |
272 | ||
273 | phy2 = wpan_phy_find(pname); | |
274 | if (!phy2) | |
275 | goto out_dev; | |
276 | ||
277 | if (phy != phy2) { | |
278 | wpan_phy_put(phy2); | |
279 | goto out_dev; | |
280 | } | |
281 | } | |
282 | ||
283 | rc = -ENOBUFS; | |
284 | ||
285 | msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE); | |
286 | if (!msg) | |
287 | goto out_dev; | |
288 | ||
289 | if (!phy->del_iface) { | |
290 | rc = -EINVAL; | |
291 | goto nla_put_failure; | |
292 | } | |
293 | ||
294 | rtnl_lock(); | |
295 | phy->del_iface(phy, dev); | |
296 | ||
297 | /* We don't have device anymore */ | |
298 | dev_put(dev); | |
299 | dev = NULL; | |
300 | ||
301 | rtnl_unlock(); | |
302 | ||
303 | ||
304 | NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)); | |
305 | NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, name); | |
306 | ||
307 | wpan_phy_put(phy); | |
308 | ||
309 | return ieee802154_nl_reply(msg, info); | |
310 | ||
311 | nla_put_failure: | |
312 | nlmsg_free(msg); | |
313 | out_dev: | |
314 | wpan_phy_put(phy); | |
315 | if (dev) | |
316 | dev_put(dev); | |
317 | ||
318 | return rc; | |
319 | } | |
320 | ||
1eaa9d03 DES |
321 | static struct genl_ops ieee802154_phy_ops[] = { |
322 | IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy, | |
323 | ieee802154_dump_phy), | |
bb1cafb8 DES |
324 | IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface), |
325 | IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface), | |
1eaa9d03 DES |
326 | }; |
327 | ||
328 | /* | |
329 | * No need to unregister as family unregistration will do it. | |
330 | */ | |
331 | int nl802154_phy_register(void) | |
332 | { | |
333 | int i; | |
334 | int rc; | |
335 | ||
336 | for (i = 0; i < ARRAY_SIZE(ieee802154_phy_ops); i++) { | |
337 | rc = genl_register_ops(&nl802154_family, | |
338 | &ieee802154_phy_ops[i]); | |
339 | if (rc) | |
340 | return rc; | |
341 | } | |
342 | ||
343 | return 0; | |
344 | } |