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21#include <linux/kernel.h>
22#include <linux/slab.h>
23#include <linux/if_arp.h>
24#include <net/netlink.h>
25#include <net/genetlink.h>
26#include <net/cfg802154.h>
27#include <net/af_ieee802154.h>
28#include <net/ieee802154_netdev.h>
29#include <net/rtnetlink.h>
30#include <linux/nl802154.h>
31
32#include "ieee802154.h"
33#include "rdev-ops.h"
34#include "core.h"
35
36static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 portid,
37 u32 seq, int flags, struct wpan_phy *phy)
38{
39 void *hdr;
40 int i, pages = 0;
41 uint32_t *buf = kcalloc(32, sizeof(uint32_t), GFP_KERNEL);
42
43 pr_debug("%s\n", __func__);
44
45 if (!buf)
46 return -EMSGSIZE;
47
48 hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
49 IEEE802154_LIST_PHY);
50 if (!hdr)
51 goto out;
52
53 rtnl_lock();
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;
58 for (i = 0; i < 32; i++) {
59 if (phy->supported.channels[i])
60 buf[pages++] = phy->supported.channels[i] | (i << 27);
61 }
62 if (pages &&
63 nla_put(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
64 pages * sizeof(uint32_t), buf))
65 goto nla_put_failure;
66 rtnl_unlock();
67 kfree(buf);
68 genlmsg_end(msg, hdr);
69 return 0;
70
71nla_put_failure:
72 rtnl_unlock();
73 genlmsg_cancel(msg, hdr);
74out:
75 kfree(buf);
76 return -EMSGSIZE;
77}
78
79int ieee802154_list_phy(struct sk_buff *skb, struct genl_info *info)
80{
81
82
83
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;
97
98 phy = wpan_phy_find(name);
99 if (!phy)
100 return -ENODEV;
101
102 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
103 if (!msg)
104 goto out_dev;
105
106 rc = ieee802154_nl_fill_phy(msg, info->snd_portid, info->snd_seq,
107 0, phy);
108 if (rc < 0)
109 goto out_free;
110
111 wpan_phy_put(phy);
112
113 return genlmsg_reply(msg, info);
114out_free:
115 nlmsg_free(msg);
116out_dev:
117 wpan_phy_put(phy);
118 return rc;
119}
120
121struct dump_phy_data {
122 struct sk_buff *skb;
123 struct netlink_callback *cb;
124 int idx, s_idx;
125};
126
127static 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).portid,
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
151int ieee802154_dump_phy(struct sk_buff *skb, struct netlink_callback *cb)
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
169int ieee802154_add_iface(struct sk_buff *skb, struct genl_info *info)
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;
177 int type = __IEEE802154_DEV_INVALID;
178 unsigned char name_assign_type;
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;
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;
194 name_assign_type = NET_NAME_USER;
195 } else {
196 devname = "wpan%d";
197 name_assign_type = NET_NAME_ENUM;
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
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
218 if (info->attrs[IEEE802154_ATTR_DEV_TYPE]) {
219 type = nla_get_u8(info->attrs[IEEE802154_ATTR_DEV_TYPE]);
220 if (type >= __IEEE802154_DEV_MAX) {
221 rc = -EINVAL;
222 goto nla_put_failure;
223 }
224 }
225
226 dev = rdev_add_virtual_intf_deprecated(wpan_phy_to_rdev(phy), devname,
227 name_assign_type, type);
228 if (IS_ERR(dev)) {
229 rc = PTR_ERR(dev);
230 goto nla_put_failure;
231 }
232 dev_hold(dev);
233
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],
239 IEEE802154_ADDR_LEN);
240
241
242
243
244 rtnl_lock();
245 rc = dev_set_mac_address(dev, &addr, NULL);
246 rtnl_unlock();
247 if (rc)
248 goto dev_unregister;
249 }
250
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;
254 dev_put(dev);
255
256 wpan_phy_put(phy);
257
258 return ieee802154_nl_reply(msg, info);
259
260dev_unregister:
261 rtnl_lock();
262 rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev);
263 dev_put(dev);
264 rtnl_unlock();
265nla_put_failure:
266 nlmsg_free(msg);
267out_dev:
268 wpan_phy_put(phy);
269 return rc;
270}
271
272int ieee802154_del_iface(struct sk_buff *skb, struct genl_info *info)
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;
288
289 rc = -ENODEV;
290 dev = dev_get_by_name(genl_info_net(info), name);
291 if (!dev)
292 return rc;
293 if (dev->type != ARPHRD_IEEE802154)
294 goto out;
295
296 phy = dev->ieee802154_ptr->wpan_phy;
297 BUG_ON(!phy);
298 get_device(&phy->dev);
299
300 rc = -EINVAL;
301
302 if (info->attrs[IEEE802154_ATTR_PHY_NAME]) {
303 struct wpan_phy *phy2;
304
305 const char *pname =
306 nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
307 if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1]
308 != '\0')
309
310 goto out_dev;
311
312 phy2 = wpan_phy_find(pname);
313 if (!phy2)
314 goto out_dev;
315
316 if (phy != phy2) {
317 wpan_phy_put(phy2);
318 goto out_dev;
319 }
320 }
321
322 rc = -ENOBUFS;
323
324 msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE);
325 if (!msg)
326 goto out_dev;
327
328 rtnl_lock();
329 rdev_del_virtual_intf_deprecated(wpan_phy_to_rdev(phy), dev);
330
331
332 dev_put(dev);
333 dev = NULL;
334
335 rtnl_unlock();
336
337 if (nla_put_string(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy)) ||
338 nla_put_string(msg, IEEE802154_ATTR_DEV_NAME, name))
339 goto nla_put_failure;
340 wpan_phy_put(phy);
341
342 return ieee802154_nl_reply(msg, info);
343
344nla_put_failure:
345 nlmsg_free(msg);
346out_dev:
347 wpan_phy_put(phy);
348out:
349 dev_put(dev);
350
351 return rc;
352}
353
