Commit | Line | Data |
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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> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
060e4179 | 27 | #include <linux/if_arp.h> |
1eaa9d03 DES |
28 | #include <net/netlink.h> |
29 | #include <net/genetlink.h> | |
30 | #include <net/wpan-phy.h> | |
bb1cafb8 DES |
31 | #include <net/af_ieee802154.h> |
32 | #include <net/ieee802154_netdev.h> | |
33 | #include <net/rtnetlink.h> /* for rtnl_{un,}lock */ | |
1eaa9d03 DES |
34 | #include <linux/nl802154.h> |
35 | ||
36 | #include "ieee802154.h" | |
37 | ||
15e47304 | 38 | static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid, |
1eaa9d03 DES |
39 | u32 seq, int flags, struct wpan_phy *phy) |
40 | { | |
41 | void *hdr; | |
42 | int i, pages = 0; | |
43 | uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL); | |
44 | ||
45 | pr_debug("%s\n", __func__); | |
46 | ||
47 | if (!buf) | |
b9cabe52 | 48 | return -EMSGSIZE; |
1eaa9d03 DES |
49 | |
50 | hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags, | |
51 | IEEE802154_LIST_PHY); | |
52 | if (!hdr) | |
53 | goto out; | |
54 | ||
55 | mutex_lock(&phy->pib_lock); | |
be51da0f DM |
56 | if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
57 | nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) || | |
58 | nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel)) | |
59 | goto nla_put_failure; | |
1eaa9d03 DES |
60 | for (i = 0; i < 32; i++) { |
61 | if (phy->channels_supported[i]) | |
62 | buf[pages++] = phy->channels_supported[i] | (i << 27); | |
63 | } | |
be51da0f DM |
64 | if (pages && |
65 | nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST, | |
66 | pages * sizeof(uint32_t), buf)) | |
67 | goto nla_put_failure; | |
1eaa9d03 | 68 | mutex_unlock(&phy->pib_lock); |
b9cabe52 | 69 | kfree(buf); |
1eaa9d03 DES |
70 | return genlmsg_end(msg, hdr); |
71 | ||
72 | nla_put_failure: | |
73 | mutex_unlock(&phy->pib_lock); | |
74 | genlmsg_cancel(msg, hdr); | |
75 | out: | |
76 | kfree(buf); | |
77 | return -EMSGSIZE; | |
78 | } | |
79 | ||
80 | static int ieee802154_list_phy(struct sk_buff *skb, | |
81 | struct genl_info *info) | |
82 | { | |
83 | /* Request for interface name, index, type, IEEE address, | |
84 | PAN Id, short address */ | |
85 | struct sk_buff *msg; | |
86 | struct wpan_phy *phy; | |
87 | const char *name; | |
88 | int rc = -ENOBUFS; | |
89 | ||
90 | pr_debug("%s\n", __func__); | |
91 | ||
92 | if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) | |
93 | return -EINVAL; | |
94 | ||
95 | name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
96 | if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') | |
97 | return -EINVAL; /* phy name should be null-terminated */ | |
98 | ||
99 | ||
100 | phy = wpan_phy_find(name); | |
101 | if (!phy) | |
102 | return -ENODEV; | |
103 | ||
58050fce | 104 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1eaa9d03 DES |
105 | if (!msg) |
106 | goto out_dev; | |
107 | ||
15e47304 | 108 | rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq, |
1eaa9d03 DES |
109 | 0, phy); |
110 | if (rc < 0) | |
111 | goto out_free; | |
112 | ||
113 | wpan_phy_put(phy); | |
114 | ||
115 | return genlmsg_reply(msg, info); | |
116 | out_free: | |
117 | nlmsg_free(msg); | |
118 | out_dev: | |
119 | wpan_phy_put(phy); | |
120 | return rc; | |
121 | ||
122 | } | |
123 | ||
124 | struct dump_phy_data { | |
125 | struct sk_buff *skb; | |
126 | struct netlink_callback *cb; | |
127 | int idx, s_idx; | |
128 | }; | |
129 | ||
130 | static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data) | |
131 | { | |
132 | int rc; | |
133 | struct dump_phy_data *data = _data; | |
134 | ||
135 | pr_debug("%s\n", __func__); | |
136 | ||
137 | if (data->idx++ < data->s_idx) | |
138 | return 0; | |
139 | ||
140 | rc = ieee802154_nl_fill_phy(data->skb, | |
15e47304 | 141 | NETLINK_CB(data->cb->skb).portid, |
1eaa9d03 DES |
142 | data->cb->nlh->nlmsg_seq, |
143 | NLM_F_MULTI, | |
144 | phy); | |
145 | ||
146 | if (rc < 0) { | |
147 | data->idx--; | |
148 | return rc; | |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int ieee802154_dump_phy(struct sk_buff *skb, | |
155 | struct netlink_callback *cb) | |
156 | { | |
157 | struct dump_phy_data data = { | |
158 | .cb = cb, | |
159 | .skb = skb, | |
160 | .s_idx = cb->args[0], | |
161 | .idx = 0, | |
162 | }; | |
163 | ||
164 | pr_debug("%s\n", __func__); | |
165 | ||
166 | wpan_phy_for_each(ieee802154_dump_phy_iter, &data); | |
167 | ||
168 | cb->args[0] = data.idx; | |
169 | ||
170 | return skb->len; | |
171 | } | |
172 | ||
bb1cafb8 DES |
173 | static int ieee802154_add_iface(struct sk_buff *skb, |
174 | struct genl_info *info) | |
175 | { | |
176 | struct sk_buff *msg; | |
177 | struct wpan_phy *phy; | |
178 | const char *name; | |
179 | const char *devname; | |
180 | int rc = -ENOBUFS; | |
181 | struct net_device *dev; | |
90c049b2 | 182 | int type = __IEEE802154_DEV_INVALID; |
bb1cafb8 DES |
183 | |
184 | pr_debug("%s\n", __func__); | |
185 | ||
186 | if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) | |
187 | return -EINVAL; | |
188 | ||
189 | name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
190 | if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') | |
191 | return -EINVAL; /* phy name should be null-terminated */ | |
192 | ||
193 | if (info->attrs[IEEE802154_ATTR_DEV_NAME]) { | |
194 | devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); | |
195 | if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] | |
196 | != '\0') | |
197 | return -EINVAL; /* phy name should be null-terminated */ | |
198 | } else { | |
199 | devname = "wpan%d"; | |
200 | } | |
201 | ||
202 | if (strlen(devname) >= IFNAMSIZ) | |
203 | return -ENAMETOOLONG; | |
204 | ||
205 | phy = wpan_phy_find(name); | |
206 | if (!phy) | |
207 | return -ENODEV; | |
208 | ||
209 | msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE); | |
210 | if (!msg) | |
211 | goto out_dev; | |
212 | ||
213 | if (!phy->add_iface) { | |
214 | rc = -EINVAL; | |
215 | goto nla_put_failure; | |
216 | } | |
217 | ||
060e4179 DES |
218 | if (info->attrs[IEEE802154_ATTR_HW_ADDR] && |
219 | nla_len(info->attrs[IEEE802154_ATTR_HW_ADDR]) != | |
220 | IEEE802154_ADDR_LEN) { | |
221 | rc = -EINVAL; | |
222 | goto nla_put_failure; | |
223 | } | |
224 | ||
90c049b2 | 225 | if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) { |
226 | type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]); | |
227 | if (type >= __IEEE802154_DEV_MAX) | |
228 | return -EINVAL; | |
229 | } | |
230 | ||
231 | dev = phy->add_iface(phy, devname, type); | |
bb1cafb8 DES |
232 | if (IS_ERR(dev)) { |
233 | rc = PTR_ERR(dev); | |
234 | goto nla_put_failure; | |
235 | } | |
236 | ||
060e4179 DES |
237 | if (info->attrs[IEEE802154_ATTR_HW_ADDR]) { |
238 | struct sockaddr addr; | |
239 | ||
240 | addr.sa_family = ARPHRD_IEEE802154; | |
241 | nla_memcpy(&addr.sa_data, info->attrs[IEEE802154_ATTR_HW_ADDR], | |
242 | IEEE802154_ADDR_LEN); | |
243 | ||
244 | /* | |
245 | * strangely enough, some callbacks (inetdev_event) from | |
246 | * dev_set_mac_address require RTNL_LOCK | |
247 | */ | |
248 | rtnl_lock(); | |
249 | rc = dev_set_mac_address(dev, &addr); | |
250 | rtnl_unlock(); | |
251 | if (rc) | |
252 | goto dev_unregister; | |
253 | } | |
254 | ||
be51da0f DM |
255 | if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
256 | nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name)) | |
257 | goto nla_put_failure; | |
bb1cafb8 DES |
258 | dev_put(dev); |
259 | ||
260 | wpan_phy_put(phy); | |
261 | ||
262 | return ieee802154_nl_reply(msg, info); | |
263 | ||
060e4179 DES |
264 | dev_unregister: |
265 | rtnl_lock(); /* del_iface must be called with RTNL lock */ | |
266 | phy->del_iface(phy, dev); | |
267 | dev_put(dev); | |
268 | rtnl_unlock(); | |
bb1cafb8 DES |
269 | nla_put_failure: |
270 | nlmsg_free(msg); | |
271 | out_dev: | |
272 | wpan_phy_put(phy); | |
273 | return rc; | |
274 | } | |
275 | ||
276 | static int ieee802154_del_iface(struct sk_buff *skb, | |
277 | struct genl_info *info) | |
278 | { | |
279 | struct sk_buff *msg; | |
280 | struct wpan_phy *phy; | |
281 | const char *name; | |
282 | int rc; | |
283 | struct net_device *dev; | |
284 | ||
285 | pr_debug("%s\n", __func__); | |
286 | ||
287 | if (!info->attrs[IEEE802154_ATTR_DEV_NAME]) | |
288 | return -EINVAL; | |
289 | ||
290 | name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); | |
291 | if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0') | |
292 | return -EINVAL; /* name should be null-terminated */ | |
293 | ||
294 | dev = dev_get_by_name(genl_info_net(info), name); | |
295 | if (!dev) | |
296 | return -ENODEV; | |
297 | ||
298 | phy = ieee802154_mlme_ops(dev)->get_phy(dev); | |
299 | BUG_ON(!phy); | |
300 | ||
301 | rc = -EINVAL; | |
302 | /* phy name is optional, but should be checked if it's given */ | |
303 | if (info->attrs[IEEE802154_ATTR_PHY_NAME]) { | |
304 | struct wpan_phy *phy2; | |
305 | ||
306 | const char *pname = | |
307 | nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
308 | if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] | |
309 | != '\0') | |
310 | /* name should be null-terminated */ | |
311 | goto out_dev; | |
312 | ||
313 | phy2 = wpan_phy_find(pname); | |
314 | if (!phy2) | |
315 | goto out_dev; | |
316 | ||
317 | if (phy != phy2) { | |
318 | wpan_phy_put(phy2); | |
319 | goto out_dev; | |
320 | } | |
321 | } | |
322 | ||
323 | rc = -ENOBUFS; | |
324 | ||
325 | msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE); | |
326 | if (!msg) | |
327 | goto out_dev; | |
328 | ||
329 | if (!phy->del_iface) { | |
330 | rc = -EINVAL; | |
331 | goto nla_put_failure; | |
332 | } | |
333 | ||
334 | rtnl_lock(); | |
335 | phy->del_iface(phy, dev); | |
336 | ||
337 | /* We don't have device anymore */ | |
338 | dev_put(dev); | |
339 | dev = NULL; | |
340 | ||
341 | rtnl_unlock(); | |
342 | ||
be51da0f DM |
343 | if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
344 | nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name)) | |
345 | goto nla_put_failure; | |
bb1cafb8 DES |
346 | wpan_phy_put(phy); |
347 | ||
348 | return ieee802154_nl_reply(msg, info); | |
349 | ||
350 | nla_put_failure: | |
351 | nlmsg_free(msg); | |
352 | out_dev: | |
353 | wpan_phy_put(phy); | |
354 | if (dev) | |
355 | dev_put(dev); | |
356 | ||
357 | return rc; | |
358 | } | |
359 | ||
1eaa9d03 DES |
360 | static struct genl_ops ieee802154_phy_ops[] = { |
361 | IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy, | |
362 | ieee802154_dump_phy), | |
bb1cafb8 DES |
363 | IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface), |
364 | IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface), | |
1eaa9d03 DES |
365 | }; |
366 | ||
367 | /* | |
368 | * No need to unregister as family unregistration will do it. | |
369 | */ | |
370 | int nl802154_phy_register(void) | |
371 | { | |
372 | int i; | |
373 | int rc; | |
374 | ||
375 | for (i = 0; i < ARRAY_SIZE(ieee802154_phy_ops); i++) { | |
376 | rc = genl_register_ops(&nl802154_family, | |
377 | &ieee802154_phy_ops[i]); | |
378 | if (rc) | |
379 | return rc; | |
380 | } | |
381 | ||
382 | return 0; | |
383 | } |