Commit | Line | Data |
---|---|---|
1eaa9d03 | 1 | /* |
69bb631e | 2 | * Netlink interface for IEEE 802.15.4 stack |
1eaa9d03 DES |
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 | * | |
1eaa9d03 DES |
15 | * Written by: |
16 | * Sergey Lapin <slapin@ossfans.org> | |
17 | * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> | |
18 | * Maxim Osipov <maxim.osipov@siemens.com> | |
19 | */ | |
20 | ||
21 | #include <linux/kernel.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
060e4179 | 23 | #include <linux/if_arp.h> |
1eaa9d03 DES |
24 | #include <net/netlink.h> |
25 | #include <net/genetlink.h> | |
5ad60d36 | 26 | #include <net/cfg802154.h> |
bb1cafb8 DES |
27 | #include <net/af_ieee802154.h> |
28 | #include <net/ieee802154_netdev.h> | |
29 | #include <net/rtnetlink.h> /* for rtnl_{un,}lock */ | |
1eaa9d03 DES |
30 | #include <linux/nl802154.h> |
31 | ||
32 | #include "ieee802154.h" | |
4a9a816a AA |
33 | #include "rdev-ops.h" |
34 | #include "core.h" | |
1eaa9d03 | 35 | |
15e47304 | 36 | static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid, |
4710d806 | 37 | u32 seq, int flags, struct wpan_phy *phy) |
1eaa9d03 DES |
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) | |
b9cabe52 | 46 | return -EMSGSIZE; |
1eaa9d03 DES |
47 | |
48 | hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags, | |
4710d806 | 49 | IEEE802154_LIST_PHY); |
1eaa9d03 DES |
50 | if (!hdr) |
51 | goto out; | |
52 | ||
53 | mutex_lock(&phy->pib_lock); | |
be51da0f DM |
54 | if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
55 | nla_put_u8(msg, IEEE802154_ATTR_PAGE, phy->current_page) || | |
56 | nla_put_u8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel)) | |
57 | goto nla_put_failure; | |
1eaa9d03 DES |
58 | for (i = 0; i < 32; i++) { |
59 | if (phy->channels_supported[i]) | |
60 | buf[pages++] = phy->channels_supported[i] | (i << 27); | |
61 | } | |
be51da0f DM |
62 | if (pages && |
63 | nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST, | |
64 | pages * sizeof(uint32_t), buf)) | |
65 | goto nla_put_failure; | |
1eaa9d03 | 66 | mutex_unlock(&phy->pib_lock); |
b9cabe52 | 67 | kfree(buf); |
053c095a JB |
68 | genlmsg_end(msg, hdr); |
69 | return 0; | |
1eaa9d03 DES |
70 | |
71 | nla_put_failure: | |
72 | mutex_unlock(&phy->pib_lock); | |
73 | genlmsg_cancel(msg, hdr); | |
74 | out: | |
75 | kfree(buf); | |
76 | return -EMSGSIZE; | |
77 | } | |
78 | ||
1c582d91 | 79 | int ieee802154_list_phy(struct sk_buff *skb, struct genl_info *info) |
1eaa9d03 DES |
80 | { |
81 | /* Request for interface name, index, type, IEEE address, | |
4710d806 VB |
82 | * PAN Id, short address |
83 | */ | |
1eaa9d03 DES |
84 | struct sk_buff *msg; |
85 | struct wpan_phy *phy; | |
86 | const char *name; | |
87 | int rc = -ENOBUFS; | |
88 | ||
89 | pr_debug("%s\n", __func__); | |
90 | ||
91 | if (!info->attrs[IEEE802154_ATTR_PHY_NAME]) | |
92 | return -EINVAL; | |
93 | ||
94 | name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
95 | if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0') | |
96 | return -EINVAL; /* phy name should be null-terminated */ | |
97 | ||
1eaa9d03 DES |
98 | phy = wpan_phy_find(name); |
99 | if (!phy) | |
100 | return -ENODEV; | |
101 | ||
58050fce | 102 | msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); |
1eaa9d03 DES |
103 | if (!msg) |
104 | goto out_dev; | |
105 | ||
15e47304 | 106 | rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq, |
4710d806 | 107 | 0, phy); |
1eaa9d03 DES |
108 | if (rc < 0) |
109 | goto out_free; | |
110 | ||
111 | wpan_phy_put(phy); | |
112 | ||
113 | return genlmsg_reply(msg, info); | |
114 | out_free: | |
115 | nlmsg_free(msg); | |
116 | out_dev: | |
117 | wpan_phy_put(phy); | |
118 | return rc; | |
1eaa9d03 DES |
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, | |
4710d806 VB |
138 | NETLINK_CB(data->cb->skb).portid, |
139 | data->cb->nlh->nlmsg_seq, | |
140 | NLM_F_MULTI, | |
141 | phy); | |
1eaa9d03 DES |
142 | |
143 | if (rc < 0) { | |
144 | data->idx--; | |
145 | return rc; | |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
1c582d91 | 151 | int ieee802154_dump_phy(struct sk_buff *skb, struct netlink_callback *cb) |
1eaa9d03 DES |
152 | { |
153 | struct dump_phy_data data = { | |
154 | .cb = cb, | |
155 | .skb = skb, | |
156 | .s_idx = cb->args[0], | |
157 | .idx = 0, | |
158 | }; | |
159 | ||
160 | pr_debug("%s\n", __func__); | |
161 | ||
162 | wpan_phy_for_each(ieee802154_dump_phy_iter, &data); | |
163 | ||
164 | cb->args[0] = data.idx; | |
165 | ||
166 | return skb->len; | |
167 | } | |
168 | ||
1c582d91 | 169 | int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info) |
bb1cafb8 DES |
170 | { |
171 | struct sk_buff *msg; | |
172 | struct wpan_phy *phy; | |
173 | const char *name; | |
174 | const char *devname; | |
175 | int rc = -ENOBUFS; | |
176 | struct net_device *dev; | |
90c049b2 | 177 | int type = __IEEE802154_DEV_INVALID; |
5b4a1039 | 178 | unsigned char name_assign_type; |
bb1cafb8 DES |
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 */ | |
5b4a1039 | 194 | name_assign_type = NET_NAME_USER; |
bb1cafb8 DES |
195 | } else { |
196 | devname = "wpan%d"; | |
5b4a1039 | 197 | name_assign_type = NET_NAME_ENUM; |
bb1cafb8 DES |
198 | } |
199 | ||
200 | if (strlen(devname) >= IFNAMSIZ) | |
201 | return -ENAMETOOLONG; | |
202 | ||
203 | phy = wpan_phy_find(name); | |
204 | if (!phy) | |
205 | return -ENODEV; | |
206 | ||
207 | msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE); | |
208 | if (!msg) | |
209 | goto out_dev; | |
210 | ||
060e4179 DES |
211 | if (info->attrs[IEEE802154_ATTR_HW_ADDR] && |
212 | nla_len(info->attrs[IEEE802154_ATTR_HW_ADDR]) != | |
213 | IEEE802154_ADDR_LEN) { | |
214 | rc = -EINVAL; | |
215 | goto nla_put_failure; | |
216 | } | |
217 | ||
90c049b2 | 218 | if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) { |
219 | type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]); | |
267d29a6 CE |
220 | if (type >= __IEEE802154_DEV_MAX) { |
221 | rc = -EINVAL; | |
222 | goto nla_put_failure; | |
223 | } | |
90c049b2 | 224 | } |
225 | ||
4a9a816a | 226 | dev = rdev_add_virtual_intf_deprecated(wpan_phy_to_rdev(phy), devname, |
5b4a1039 | 227 | name_assign_type, type); |
bb1cafb8 DES |
228 | if (IS_ERR(dev)) { |
229 | rc = PTR_ERR(dev); | |
230 | goto nla_put_failure; | |
231 | } | |
12cb56c2 | 232 | dev_hold(dev); |
bb1cafb8 | 233 | |
060e4179 DES |
234 | if (info->attrs[IEEE802154_ATTR_HW_ADDR]) { |
235 | struct sockaddr addr; | |
236 | ||
237 | addr.sa_family = ARPHRD_IEEE802154; | |
238 | nla_memcpy(&addr.sa_data, info->attrs[IEEE802154_ATTR_HW_ADDR], | |
4710d806 | 239 | IEEE802154_ADDR_LEN); |
060e4179 | 240 | |
4710d806 | 241 | /* strangely enough, some callbacks (inetdev_event) from |
060e4179 DES |
242 | * dev_set_mac_address require RTNL_LOCK |
243 | */ | |
244 | rtnl_lock(); | |
245 | rc = dev_set_mac_address(dev, &addr); | |
246 | rtnl_unlock(); | |
247 | if (rc) | |
248 | goto dev_unregister; | |
249 | } | |
250 | ||
be51da0f DM |
251 | if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
252 | nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, dev->name)) | |
253 | goto nla_put_failure; | |
bb1cafb8 DES |
254 | dev_put(dev); |
255 | ||
256 | wpan_phy_put(phy); | |
257 | ||
258 | return ieee802154_nl_reply(msg, info); | |
259 | ||
060e4179 DES |
260 | dev_unregister: |
261 | rtnl_lock(); /* del_iface must be called with RTNL lock */ | |
4a9a816a | 262 | rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev); |
060e4179 DES |
263 | dev_put(dev); |
264 | rtnl_unlock(); | |
bb1cafb8 DES |
265 | nla_put_failure: |
266 | nlmsg_free(msg); | |
267 | out_dev: | |
268 | wpan_phy_put(phy); | |
269 | return rc; | |
270 | } | |
271 | ||
1c582d91 | 272 | int ieee802154_del_iface(struct sk_buff *skb, struct genl_info *info) |
bb1cafb8 DES |
273 | { |
274 | struct sk_buff *msg; | |
275 | struct wpan_phy *phy; | |
276 | const char *name; | |
277 | int rc; | |
278 | struct net_device *dev; | |
279 | ||
280 | pr_debug("%s\n", __func__); | |
281 | ||
282 | if (!info->attrs[IEEE802154_ATTR_DEV_NAME]) | |
283 | return -EINVAL; | |
284 | ||
285 | name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]); | |
286 | if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0') | |
287 | return -EINVAL; /* name should be null-terminated */ | |
288 | ||
289 | dev = dev_get_by_name(genl_info_net(info), name); | |
290 | if (!dev) | |
291 | return -ENODEV; | |
292 | ||
bd28a11f | 293 | phy = dev->ieee802154_ptr->wpan_phy; |
bb1cafb8 | 294 | BUG_ON(!phy); |
bd28a11f | 295 | get_device(&phy->dev); |
bb1cafb8 DES |
296 | |
297 | rc = -EINVAL; | |
298 | /* phy name is optional, but should be checked if it's given */ | |
299 | if (info->attrs[IEEE802154_ATTR_PHY_NAME]) { | |
300 | struct wpan_phy *phy2; | |
301 | ||
302 | const char *pname = | |
303 | nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]); | |
304 | if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] | |
305 | != '\0') | |
306 | /* name should be null-terminated */ | |
307 | goto out_dev; | |
308 | ||
309 | phy2 = wpan_phy_find(pname); | |
310 | if (!phy2) | |
311 | goto out_dev; | |
312 | ||
313 | if (phy != phy2) { | |
314 | wpan_phy_put(phy2); | |
315 | goto out_dev; | |
316 | } | |
317 | } | |
318 | ||
319 | rc = -ENOBUFS; | |
320 | ||
321 | msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE); | |
322 | if (!msg) | |
323 | goto out_dev; | |
324 | ||
bb1cafb8 | 325 | rtnl_lock(); |
4a9a816a | 326 | rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev); |
bb1cafb8 DES |
327 | |
328 | /* We don't have device anymore */ | |
329 | dev_put(dev); | |
330 | dev = NULL; | |
331 | ||
332 | rtnl_unlock(); | |
333 | ||
be51da0f DM |
334 | if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) || |
335 | nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name)) | |
336 | goto nla_put_failure; | |
bb1cafb8 DES |
337 | wpan_phy_put(phy); |
338 | ||
339 | return ieee802154_nl_reply(msg, info); | |
340 | ||
341 | nla_put_failure: | |
342 | nlmsg_free(msg); | |
343 | out_dev: | |
344 | wpan_phy_put(phy); | |
345 | if (dev) | |
346 | dev_put(dev); | |
347 | ||
348 | return rc; | |
349 | } |