nl80211.c 223 KB

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  1. /*
  2. * This is the new netlink-based wireless configuration interface.
  3. *
  4. * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
  5. */
  6. #include <linux/if.h>
  7. #include <linux/module.h>
  8. #include <linux/err.h>
  9. #include <linux/slab.h>
  10. #include <linux/list.h>
  11. #include <linux/if_ether.h>
  12. #include <linux/ieee80211.h>
  13. #include <linux/nl80211.h>
  14. #include <linux/rtnetlink.h>
  15. #include <linux/netlink.h>
  16. #include <linux/etherdevice.h>
  17. #include <net/net_namespace.h>
  18. #include <net/genetlink.h>
  19. #include <net/cfg80211.h>
  20. #include <net/sock.h>
  21. #include "core.h"
  22. #include "nl80211.h"
  23. #include "reg.h"
  24. static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type);
  25. static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  26. struct genl_info *info,
  27. struct cfg80211_crypto_settings *settings,
  28. int cipher_limit);
  29. static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  30. struct genl_info *info);
  31. static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  32. struct genl_info *info);
  33. /* the netlink family */
  34. static struct genl_family nl80211_fam = {
  35. .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */
  36. .name = "nl80211", /* have users key off the name instead */
  37. .hdrsize = 0, /* no private header */
  38. .version = 1, /* no particular meaning now */
  39. .maxattr = NL80211_ATTR_MAX,
  40. .netnsok = true,
  41. .pre_doit = nl80211_pre_doit,
  42. .post_doit = nl80211_post_doit,
  43. };
  44. /* internal helper: get rdev and dev */
  45. static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs,
  46. struct cfg80211_registered_device **rdev,
  47. struct net_device **dev)
  48. {
  49. int ifindex;
  50. if (!attrs[NL80211_ATTR_IFINDEX])
  51. return -EINVAL;
  52. ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
  53. *dev = dev_get_by_index(netns, ifindex);
  54. if (!*dev)
  55. return -ENODEV;
  56. *rdev = cfg80211_get_dev_from_ifindex(netns, ifindex);
  57. if (IS_ERR(*rdev)) {
  58. dev_put(*dev);
  59. return PTR_ERR(*rdev);
  60. }
  61. return 0;
  62. }
  63. static struct cfg80211_registered_device *
  64. __cfg80211_rdev_from_info(struct net *netns, struct genl_info *info)
  65. {
  66. struct cfg80211_registered_device *rdev = NULL, *tmp;
  67. struct net_device *netdev;
  68. assert_cfg80211_lock();
  69. if (!info->attrs[NL80211_ATTR_WIPHY] &&
  70. !info->attrs[NL80211_ATTR_IFINDEX])
  71. return ERR_PTR(-EINVAL);
  72. if (info->attrs[NL80211_ATTR_WIPHY])
  73. rdev = cfg80211_rdev_by_wiphy_idx(
  74. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
  75. if (info->attrs[NL80211_ATTR_IFINDEX]) {
  76. int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
  77. netdev = dev_get_by_index(netns, ifindex);
  78. if (netdev) {
  79. if (netdev->ieee80211_ptr)
  80. tmp = wiphy_to_dev(
  81. netdev->ieee80211_ptr->wiphy);
  82. else
  83. tmp = NULL;
  84. dev_put(netdev);
  85. /* not wireless device -- return error */
  86. if (!tmp)
  87. return ERR_PTR(-EINVAL);
  88. /* mismatch -- return error */
  89. if (rdev && tmp != rdev)
  90. return ERR_PTR(-EINVAL);
  91. rdev = tmp;
  92. }
  93. }
  94. if (!rdev)
  95. return ERR_PTR(-ENODEV);
  96. if (netns != wiphy_net(&rdev->wiphy))
  97. return ERR_PTR(-ENODEV);
  98. return rdev;
  99. }
  100. /*
  101. * This function returns a pointer to the driver
  102. * that the genl_info item that is passed refers to.
  103. * If successful, it returns non-NULL and also locks
  104. * the driver's mutex!
  105. *
  106. * This means that you need to call cfg80211_unlock_rdev()
  107. * before being allowed to acquire &cfg80211_mutex!
  108. *
  109. * This is necessary because we need to lock the global
  110. * mutex to get an item off the list safely, and then
  111. * we lock the rdev mutex so it doesn't go away under us.
  112. *
  113. * We don't want to keep cfg80211_mutex locked
  114. * for all the time in order to allow requests on
  115. * other interfaces to go through at the same time.
  116. *
  117. * The result of this can be a PTR_ERR and hence must
  118. * be checked with IS_ERR() for errors.
  119. */
  120. static struct cfg80211_registered_device *
  121. cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
  122. {
  123. struct cfg80211_registered_device *rdev;
  124. mutex_lock(&cfg80211_mutex);
  125. rdev = __cfg80211_rdev_from_info(netns, info);
  126. /* if it is not an error we grab the lock on
  127. * it to assure it won't be going away while
  128. * we operate on it */
  129. if (!IS_ERR(rdev))
  130. mutex_lock(&rdev->mtx);
  131. mutex_unlock(&cfg80211_mutex);
  132. return rdev;
  133. }
  134. /* policy for the attributes */
  135. static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
  136. [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
  137. [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
  138. .len = 20-1 },
  139. [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
  140. [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
  141. [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
  142. [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 },
  143. [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 },
  144. [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
  145. [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
  146. [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
  147. [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
  148. [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
  149. [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
  150. [NL80211_ATTR_MAC] = { .len = ETH_ALEN },
  151. [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
  152. [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
  153. [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
  154. .len = WLAN_MAX_KEY_LEN },
  155. [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 },
  156. [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
  157. [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
  158. [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
  159. [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 },
  160. [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
  161. [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
  162. [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY,
  163. .len = IEEE80211_MAX_DATA_LEN },
  164. [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY,
  165. .len = IEEE80211_MAX_DATA_LEN },
  166. [NL80211_ATTR_STA_AID] = { .type = NLA_U16 },
  167. [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
  168. [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
  169. [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
  170. .len = NL80211_MAX_SUPP_RATES },
  171. [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 },
  172. [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
  173. [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
  174. [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
  175. .len = IEEE80211_MAX_MESH_ID_LEN },
  176. [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 },
  177. [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 },
  178. [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },
  179. [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
  180. [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
  181. [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
  182. [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
  183. .len = NL80211_MAX_SUPP_RATES },
  184. [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },
  185. [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
  186. [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },
  187. [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN },
  188. [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
  189. [NL80211_ATTR_IE] = { .type = NLA_BINARY,
  190. .len = IEEE80211_MAX_DATA_LEN },
  191. [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
  192. [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },
  193. [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
  194. .len = IEEE80211_MAX_SSID_LEN },
  195. [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
  196. [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
  197. [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
  198. [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
  199. [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 },
  200. [NL80211_ATTR_STA_FLAGS2] = {
  201. .len = sizeof(struct nl80211_sta_flag_update),
  202. },
  203. [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
  204. [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
  205. [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
  206. [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
  207. [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
  208. [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 },
  209. [NL80211_ATTR_PID] = { .type = NLA_U32 },
  210. [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
  211. [NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
  212. .len = WLAN_PMKID_LEN },
  213. [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
  214. [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
  215. [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
  216. [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
  217. .len = IEEE80211_MAX_DATA_LEN },
  218. [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
  219. [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 },
  220. [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
  221. [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
  222. [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
  223. [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
  224. [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
  225. [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
  226. [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
  227. [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
  228. [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
  229. [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
  230. [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
  231. [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
  232. [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 },
  233. [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
  234. [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
  235. [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
  236. [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 },
  237. [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY,
  238. .len = IEEE80211_MAX_DATA_LEN },
  239. [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
  240. .len = IEEE80211_MAX_DATA_LEN },
  241. [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
  242. [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
  243. [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
  244. [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
  245. [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
  246. [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
  247. [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
  248. [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
  249. [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
  250. [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
  251. .len = IEEE80211_MAX_DATA_LEN },
  252. [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
  253. [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
  254. [NL80211_ATTR_HT_CAPABILITY_MASK] = {
  255. .len = NL80211_HT_CAPABILITY_LEN
  256. },
  257. [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
  258. [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
  259. [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
  260. };
  261. /* policy for the key attributes */
  262. static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
  263. [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
  264. [NL80211_KEY_IDX] = { .type = NLA_U8 },
  265. [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
  266. [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
  267. [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
  268. [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
  269. [NL80211_KEY_TYPE] = { .type = NLA_U32 },
  270. [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
  271. };
  272. /* policy for the key default flags */
  273. static const struct nla_policy
  274. nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
  275. [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
  276. [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
  277. };
  278. /* policy for WoWLAN attributes */
  279. static const struct nla_policy
  280. nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
  281. [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
  282. [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
  283. [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
  284. [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
  285. [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
  286. [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
  287. [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
  288. [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
  289. };
  290. /* policy for GTK rekey offload attributes */
  291. static const struct nla_policy
  292. nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
  293. [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN },
  294. [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN },
  295. [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN },
  296. };
  297. static const struct nla_policy
  298. nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
  299. [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
  300. .len = IEEE80211_MAX_SSID_LEN },
  301. };
  302. /* ifidx get helper */
  303. static int nl80211_get_ifidx(struct netlink_callback *cb)
  304. {
  305. int res;
  306. res = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
  307. nl80211_fam.attrbuf, nl80211_fam.maxattr,
  308. nl80211_policy);
  309. if (res)
  310. return res;
  311. if (!nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX])
  312. return -EINVAL;
  313. res = nla_get_u32(nl80211_fam.attrbuf[NL80211_ATTR_IFINDEX]);
  314. if (!res)
  315. return -EINVAL;
  316. return res;
  317. }
  318. static int nl80211_prepare_netdev_dump(struct sk_buff *skb,
  319. struct netlink_callback *cb,
  320. struct cfg80211_registered_device **rdev,
  321. struct net_device **dev)
  322. {
  323. int ifidx = cb->args[0];
  324. int err;
  325. if (!ifidx)
  326. ifidx = nl80211_get_ifidx(cb);
  327. if (ifidx < 0)
  328. return ifidx;
  329. cb->args[0] = ifidx;
  330. rtnl_lock();
  331. *dev = __dev_get_by_index(sock_net(skb->sk), ifidx);
  332. if (!*dev) {
  333. err = -ENODEV;
  334. goto out_rtnl;
  335. }
  336. *rdev = cfg80211_get_dev_from_ifindex(sock_net(skb->sk), ifidx);
  337. if (IS_ERR(*rdev)) {
  338. err = PTR_ERR(*rdev);
  339. goto out_rtnl;
  340. }
  341. return 0;
  342. out_rtnl:
  343. rtnl_unlock();
  344. return err;
  345. }
  346. static void nl80211_finish_netdev_dump(struct cfg80211_registered_device *rdev)
  347. {
  348. cfg80211_unlock_rdev(rdev);
  349. rtnl_unlock();
  350. }
  351. /* IE validation */
  352. static bool is_valid_ie_attr(const struct nlattr *attr)
  353. {
  354. const u8 *pos;
  355. int len;
  356. if (!attr)
  357. return true;
  358. pos = nla_data(attr);
  359. len = nla_len(attr);
  360. while (len) {
  361. u8 elemlen;
  362. if (len < 2)
  363. return false;
  364. len -= 2;
  365. elemlen = pos[1];
  366. if (elemlen > len)
  367. return false;
  368. len -= elemlen;
  369. pos += 2 + elemlen;
  370. }
  371. return true;
  372. }
  373. /* message building helper */
  374. static inline void *nl80211hdr_put(struct sk_buff *skb, u32 pid, u32 seq,
  375. int flags, u8 cmd)
  376. {
  377. /* since there is no private header just add the generic one */
  378. return genlmsg_put(skb, pid, seq, &nl80211_fam, flags, cmd);
  379. }
  380. static int nl80211_msg_put_channel(struct sk_buff *msg,
  381. struct ieee80211_channel *chan)
  382. {
  383. if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
  384. chan->center_freq))
  385. goto nla_put_failure;
  386. if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
  387. nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
  388. goto nla_put_failure;
  389. if ((chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) &&
  390. nla_put_flag(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN))
  391. goto nla_put_failure;
  392. if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
  393. nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
  394. goto nla_put_failure;
  395. if ((chan->flags & IEEE80211_CHAN_RADAR) &&
  396. nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
  397. goto nla_put_failure;
  398. if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
  399. DBM_TO_MBM(chan->max_power)))
  400. goto nla_put_failure;
  401. return 0;
  402. nla_put_failure:
  403. return -ENOBUFS;
  404. }
  405. /* netlink command implementations */
  406. struct key_parse {
  407. struct key_params p;
  408. int idx;
  409. int type;
  410. bool def, defmgmt;
  411. bool def_uni, def_multi;
  412. };
  413. static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k)
  414. {
  415. struct nlattr *tb[NL80211_KEY_MAX + 1];
  416. int err = nla_parse_nested(tb, NL80211_KEY_MAX, key,
  417. nl80211_key_policy);
  418. if (err)
  419. return err;
  420. k->def = !!tb[NL80211_KEY_DEFAULT];
  421. k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
  422. if (k->def) {
  423. k->def_uni = true;
  424. k->def_multi = true;
  425. }
  426. if (k->defmgmt)
  427. k->def_multi = true;
  428. if (tb[NL80211_KEY_IDX])
  429. k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);
  430. if (tb[NL80211_KEY_DATA]) {
  431. k->p.key = nla_data(tb[NL80211_KEY_DATA]);
  432. k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
  433. }
  434. if (tb[NL80211_KEY_SEQ]) {
  435. k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
  436. k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
  437. }
  438. if (tb[NL80211_KEY_CIPHER])
  439. k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);
  440. if (tb[NL80211_KEY_TYPE]) {
  441. k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);
  442. if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
  443. return -EINVAL;
  444. }
  445. if (tb[NL80211_KEY_DEFAULT_TYPES]) {
  446. struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
  447. err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
  448. tb[NL80211_KEY_DEFAULT_TYPES],
  449. nl80211_key_default_policy);
  450. if (err)
  451. return err;
  452. k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
  453. k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
  454. }
  455. return 0;
  456. }
  457. static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
  458. {
  459. if (info->attrs[NL80211_ATTR_KEY_DATA]) {
  460. k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
  461. k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
  462. }
  463. if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
  464. k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
  465. k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
  466. }
  467. if (info->attrs[NL80211_ATTR_KEY_IDX])
  468. k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
  469. if (info->attrs[NL80211_ATTR_KEY_CIPHER])
  470. k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);
  471. k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
  472. k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];
  473. if (k->def) {
  474. k->def_uni = true;
  475. k->def_multi = true;
  476. }
  477. if (k->defmgmt)
  478. k->def_multi = true;
  479. if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
  480. k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
  481. if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES)
  482. return -EINVAL;
  483. }
  484. if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
  485. struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
  486. int err = nla_parse_nested(
  487. kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1,
  488. info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
  489. nl80211_key_default_policy);
  490. if (err)
  491. return err;
  492. k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
  493. k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
  494. }
  495. return 0;
  496. }
  497. static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
  498. {
  499. int err;
  500. memset(k, 0, sizeof(*k));
  501. k->idx = -1;
  502. k->type = -1;
  503. if (info->attrs[NL80211_ATTR_KEY])
  504. err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k);
  505. else
  506. err = nl80211_parse_key_old(info, k);
  507. if (err)
  508. return err;
  509. if (k->def && k->defmgmt)
  510. return -EINVAL;
  511. if (k->defmgmt) {
  512. if (k->def_uni || !k->def_multi)
  513. return -EINVAL;
  514. }
  515. if (k->idx != -1) {
  516. if (k->defmgmt) {
  517. if (k->idx < 4 || k->idx > 5)
  518. return -EINVAL;
  519. } else if (k->def) {
  520. if (k->idx < 0 || k->idx > 3)
  521. return -EINVAL;
  522. } else {
  523. if (k->idx < 0 || k->idx > 5)
  524. return -EINVAL;
  525. }
  526. }
  527. return 0;
  528. }
  529. static struct cfg80211_cached_keys *
  530. nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
  531. struct nlattr *keys)
  532. {
  533. struct key_parse parse;
  534. struct nlattr *key;
  535. struct cfg80211_cached_keys *result;
  536. int rem, err, def = 0;
  537. result = kzalloc(sizeof(*result), GFP_KERNEL);
  538. if (!result)
  539. return ERR_PTR(-ENOMEM);
  540. result->def = -1;
  541. result->defmgmt = -1;
  542. nla_for_each_nested(key, keys, rem) {
  543. memset(&parse, 0, sizeof(parse));
  544. parse.idx = -1;
  545. err = nl80211_parse_key_new(key, &parse);
  546. if (err)
  547. goto error;
  548. err = -EINVAL;
  549. if (!parse.p.key)
  550. goto error;
  551. if (parse.idx < 0 || parse.idx > 4)
  552. goto error;
  553. if (parse.def) {
  554. if (def)
  555. goto error;
  556. def = 1;
  557. result->def = parse.idx;
  558. if (!parse.def_uni || !parse.def_multi)
  559. goto error;
  560. } else if (parse.defmgmt)
  561. goto error;
  562. err = cfg80211_validate_key_settings(rdev, &parse.p,
  563. parse.idx, false, NULL);
  564. if (err)
  565. goto error;
  566. result->params[parse.idx].cipher = parse.p.cipher;
  567. result->params[parse.idx].key_len = parse.p.key_len;
  568. result->params[parse.idx].key = result->data[parse.idx];
  569. memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);
  570. }
  571. return result;
  572. error:
  573. kfree(result);
  574. return ERR_PTR(err);
  575. }
  576. static int nl80211_key_allowed(struct wireless_dev *wdev)
  577. {
  578. ASSERT_WDEV_LOCK(wdev);
  579. switch (wdev->iftype) {
  580. case NL80211_IFTYPE_AP:
  581. case NL80211_IFTYPE_AP_VLAN:
  582. case NL80211_IFTYPE_P2P_GO:
  583. case NL80211_IFTYPE_MESH_POINT:
  584. break;
  585. case NL80211_IFTYPE_ADHOC:
  586. if (!wdev->current_bss)
  587. return -ENOLINK;
  588. break;
  589. case NL80211_IFTYPE_STATION:
  590. case NL80211_IFTYPE_P2P_CLIENT:
  591. if (wdev->sme_state != CFG80211_SME_CONNECTED)
  592. return -ENOLINK;
  593. break;
  594. default:
  595. return -EINVAL;
  596. }
  597. return 0;
  598. }
  599. static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
  600. {
  601. struct nlattr *nl_modes = nla_nest_start(msg, attr);
  602. int i;
  603. if (!nl_modes)
  604. goto nla_put_failure;
  605. i = 0;
  606. while (ifmodes) {
  607. if ((ifmodes & 1) && nla_put_flag(msg, i))
  608. goto nla_put_failure;
  609. ifmodes >>= 1;
  610. i++;
  611. }
  612. nla_nest_end(msg, nl_modes);
  613. return 0;
  614. nla_put_failure:
  615. return -ENOBUFS;
  616. }
  617. static int nl80211_put_iface_combinations(struct wiphy *wiphy,
  618. struct sk_buff *msg)
  619. {
  620. struct nlattr *nl_combis;
  621. int i, j;
  622. nl_combis = nla_nest_start(msg,
  623. NL80211_ATTR_INTERFACE_COMBINATIONS);
  624. if (!nl_combis)
  625. goto nla_put_failure;
  626. for (i = 0; i < wiphy->n_iface_combinations; i++) {
  627. const struct ieee80211_iface_combination *c;
  628. struct nlattr *nl_combi, *nl_limits;
  629. c = &wiphy->iface_combinations[i];
  630. nl_combi = nla_nest_start(msg, i + 1);
  631. if (!nl_combi)
  632. goto nla_put_failure;
  633. nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS);
  634. if (!nl_limits)
  635. goto nla_put_failure;
  636. for (j = 0; j < c->n_limits; j++) {
  637. struct nlattr *nl_limit;
  638. nl_limit = nla_nest_start(msg, j + 1);
  639. if (!nl_limit)
  640. goto nla_put_failure;
  641. if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX,
  642. c->limits[j].max))
  643. goto nla_put_failure;
  644. if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
  645. c->limits[j].types))
  646. goto nla_put_failure;
  647. nla_nest_end(msg, nl_limit);
  648. }
  649. nla_nest_end(msg, nl_limits);
  650. if (c->beacon_int_infra_match &&
  651. nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
  652. goto nla_put_failure;
  653. if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
  654. c->num_different_channels) ||
  655. nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
  656. c->max_interfaces))
  657. goto nla_put_failure;
  658. nla_nest_end(msg, nl_combi);
  659. }
  660. nla_nest_end(msg, nl_combis);
  661. return 0;
  662. nla_put_failure:
  663. return -ENOBUFS;
  664. }
  665. static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
  666. struct cfg80211_registered_device *dev)
  667. {
  668. void *hdr;
  669. struct nlattr *nl_bands, *nl_band;
  670. struct nlattr *nl_freqs, *nl_freq;
  671. struct nlattr *nl_rates, *nl_rate;
  672. struct nlattr *nl_cmds;
  673. enum ieee80211_band band;
  674. struct ieee80211_channel *chan;
  675. struct ieee80211_rate *rate;
  676. int i;
  677. const struct ieee80211_txrx_stypes *mgmt_stypes =
  678. dev->wiphy.mgmt_stypes;
  679. hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
  680. if (!hdr)
  681. return -1;
  682. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx) ||
  683. nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy)) ||
  684. nla_put_u32(msg, NL80211_ATTR_GENERATION,
  685. cfg80211_rdev_list_generation) ||
  686. nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
  687. dev->wiphy.retry_short) ||
  688. nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
  689. dev->wiphy.retry_long) ||
  690. nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
  691. dev->wiphy.frag_threshold) ||
  692. nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
  693. dev->wiphy.rts_threshold) ||
  694. nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
  695. dev->wiphy.coverage_class) ||
  696. nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
  697. dev->wiphy.max_scan_ssids) ||
  698. nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
  699. dev->wiphy.max_sched_scan_ssids) ||
  700. nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
  701. dev->wiphy.max_scan_ie_len) ||
  702. nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
  703. dev->wiphy.max_sched_scan_ie_len) ||
  704. nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
  705. dev->wiphy.max_match_sets))
  706. goto nla_put_failure;
  707. if ((dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
  708. nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
  709. goto nla_put_failure;
  710. if ((dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
  711. nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
  712. goto nla_put_failure;
  713. if ((dev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
  714. nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
  715. goto nla_put_failure;
  716. if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
  717. nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
  718. goto nla_put_failure;
  719. if ((dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
  720. nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
  721. goto nla_put_failure;
  722. if ((dev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
  723. nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
  724. goto nla_put_failure;
  725. if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
  726. sizeof(u32) * dev->wiphy.n_cipher_suites,
  727. dev->wiphy.cipher_suites))
  728. goto nla_put_failure;
  729. if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
  730. dev->wiphy.max_num_pmkids))
  731. goto nla_put_failure;
  732. if ((dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
  733. nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
  734. goto nla_put_failure;
  735. if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
  736. dev->wiphy.available_antennas_tx) ||
  737. nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
  738. dev->wiphy.available_antennas_rx))
  739. goto nla_put_failure;
  740. if ((dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
  741. nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
  742. dev->wiphy.probe_resp_offload))
  743. goto nla_put_failure;
  744. if ((dev->wiphy.available_antennas_tx ||
  745. dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
  746. u32 tx_ant = 0, rx_ant = 0;
  747. int res;
  748. res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
  749. if (!res) {
  750. if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX,
  751. tx_ant) ||
  752. nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX,
  753. rx_ant))
  754. goto nla_put_failure;
  755. }
  756. }
  757. if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
  758. dev->wiphy.interface_modes))
  759. goto nla_put_failure;
  760. nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
  761. if (!nl_bands)
  762. goto nla_put_failure;
  763. for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  764. if (!dev->wiphy.bands[band])
  765. continue;
  766. nl_band = nla_nest_start(msg, band);
  767. if (!nl_band)
  768. goto nla_put_failure;
  769. /* add HT info */
  770. if (dev->wiphy.bands[band]->ht_cap.ht_supported &&
  771. (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
  772. sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
  773. &dev->wiphy.bands[band]->ht_cap.mcs) ||
  774. nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
  775. dev->wiphy.bands[band]->ht_cap.cap) ||
  776. nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
  777. dev->wiphy.bands[band]->ht_cap.ampdu_factor) ||
  778. nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
  779. dev->wiphy.bands[band]->ht_cap.ampdu_density)))
  780. goto nla_put_failure;
  781. /* add frequencies */
  782. nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
  783. if (!nl_freqs)
  784. goto nla_put_failure;
  785. for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
  786. nl_freq = nla_nest_start(msg, i);
  787. if (!nl_freq)
  788. goto nla_put_failure;
  789. chan = &dev->wiphy.bands[band]->channels[i];
  790. if (nl80211_msg_put_channel(msg, chan))
  791. goto nla_put_failure;
  792. nla_nest_end(msg, nl_freq);
  793. }
  794. nla_nest_end(msg, nl_freqs);
  795. /* add bitrates */
  796. nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
  797. if (!nl_rates)
  798. goto nla_put_failure;
  799. for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
  800. nl_rate = nla_nest_start(msg, i);
  801. if (!nl_rate)
  802. goto nla_put_failure;
  803. rate = &dev->wiphy.bands[band]->bitrates[i];
  804. if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
  805. rate->bitrate))
  806. goto nla_put_failure;
  807. if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
  808. nla_put_flag(msg,
  809. NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
  810. goto nla_put_failure;
  811. nla_nest_end(msg, nl_rate);
  812. }
  813. nla_nest_end(msg, nl_rates);
  814. nla_nest_end(msg, nl_band);
  815. }
  816. nla_nest_end(msg, nl_bands);
  817. nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
  818. if (!nl_cmds)
  819. goto nla_put_failure;
  820. i = 0;
  821. #define CMD(op, n) \
  822. do { \
  823. if (dev->ops->op) { \
  824. i++; \
  825. if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \
  826. goto nla_put_failure; \
  827. } \
  828. } while (0)
  829. CMD(add_virtual_intf, NEW_INTERFACE);
  830. CMD(change_virtual_intf, SET_INTERFACE);
  831. CMD(add_key, NEW_KEY);
  832. CMD(start_ap, START_AP);
  833. CMD(add_station, NEW_STATION);
  834. CMD(add_mpath, NEW_MPATH);
  835. CMD(update_mesh_config, SET_MESH_CONFIG);
  836. CMD(change_bss, SET_BSS);
  837. CMD(auth, AUTHENTICATE);
  838. CMD(assoc, ASSOCIATE);
  839. CMD(deauth, DEAUTHENTICATE);
  840. CMD(disassoc, DISASSOCIATE);
  841. CMD(join_ibss, JOIN_IBSS);
  842. CMD(join_mesh, JOIN_MESH);
  843. CMD(set_pmksa, SET_PMKSA);
  844. CMD(del_pmksa, DEL_PMKSA);
  845. CMD(flush_pmksa, FLUSH_PMKSA);
  846. if (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
  847. CMD(remain_on_channel, REMAIN_ON_CHANNEL);
  848. CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
  849. CMD(mgmt_tx, FRAME);
  850. CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
  851. if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
  852. i++;
  853. if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
  854. goto nla_put_failure;
  855. }
  856. if (dev->ops->set_monitor_channel || dev->ops->start_ap ||
  857. dev->ops->join_mesh) {
  858. i++;
  859. if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
  860. goto nla_put_failure;
  861. }
  862. CMD(set_wds_peer, SET_WDS_PEER);
  863. if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
  864. CMD(tdls_mgmt, TDLS_MGMT);
  865. CMD(tdls_oper, TDLS_OPER);
  866. }
  867. if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
  868. CMD(sched_scan_start, START_SCHED_SCAN);
  869. CMD(probe_client, PROBE_CLIENT);
  870. CMD(set_noack_map, SET_NOACK_MAP);
  871. if (dev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
  872. i++;
  873. if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
  874. goto nla_put_failure;
  875. }
  876. #ifdef CONFIG_NL80211_TESTMODE
  877. CMD(testmode_cmd, TESTMODE);
  878. #endif
  879. #undef CMD
  880. if (dev->ops->connect || dev->ops->auth) {
  881. i++;
  882. if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
  883. goto nla_put_failure;
  884. }
  885. if (dev->ops->disconnect || dev->ops->deauth) {
  886. i++;
  887. if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
  888. goto nla_put_failure;
  889. }
  890. nla_nest_end(msg, nl_cmds);
  891. if (dev->ops->remain_on_channel &&
  892. (dev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
  893. nla_put_u32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
  894. dev->wiphy.max_remain_on_channel_duration))
  895. goto nla_put_failure;
  896. if ((dev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
  897. nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
  898. goto nla_put_failure;
  899. if (mgmt_stypes) {
  900. u16 stypes;
  901. struct nlattr *nl_ftypes, *nl_ifs;
  902. enum nl80211_iftype ift;
  903. nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
  904. if (!nl_ifs)
  905. goto nla_put_failure;
  906. for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
  907. nl_ftypes = nla_nest_start(msg, ift);
  908. if (!nl_ftypes)
  909. goto nla_put_failure;
  910. i = 0;
  911. stypes = mgmt_stypes[ift].tx;
  912. while (stypes) {
  913. if ((stypes & 1) &&
  914. nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
  915. (i << 4) | IEEE80211_FTYPE_MGMT))
  916. goto nla_put_failure;
  917. stypes >>= 1;
  918. i++;
  919. }
  920. nla_nest_end(msg, nl_ftypes);
  921. }
  922. nla_nest_end(msg, nl_ifs);
  923. nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
  924. if (!nl_ifs)
  925. goto nla_put_failure;
  926. for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
  927. nl_ftypes = nla_nest_start(msg, ift);
  928. if (!nl_ftypes)
  929. goto nla_put_failure;
  930. i = 0;
  931. stypes = mgmt_stypes[ift].rx;
  932. while (stypes) {
  933. if ((stypes & 1) &&
  934. nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
  935. (i << 4) | IEEE80211_FTYPE_MGMT))
  936. goto nla_put_failure;
  937. stypes >>= 1;
  938. i++;
  939. }
  940. nla_nest_end(msg, nl_ftypes);
  941. }
  942. nla_nest_end(msg, nl_ifs);
  943. }
  944. if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
  945. struct nlattr *nl_wowlan;
  946. nl_wowlan = nla_nest_start(msg,
  947. NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
  948. if (!nl_wowlan)
  949. goto nla_put_failure;
  950. if (((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY) &&
  951. nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
  952. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT) &&
  953. nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
  954. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT) &&
  955. nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
  956. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
  957. nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
  958. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
  959. nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
  960. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
  961. nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
  962. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
  963. nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
  964. ((dev->wiphy.wowlan.flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
  965. nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
  966. goto nla_put_failure;
  967. if (dev->wiphy.wowlan.n_patterns) {
  968. struct nl80211_wowlan_pattern_support pat = {
  969. .max_patterns = dev->wiphy.wowlan.n_patterns,
  970. .min_pattern_len =
  971. dev->wiphy.wowlan.pattern_min_len,
  972. .max_pattern_len =
  973. dev->wiphy.wowlan.pattern_max_len,
  974. };
  975. if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
  976. sizeof(pat), &pat))
  977. goto nla_put_failure;
  978. }
  979. nla_nest_end(msg, nl_wowlan);
  980. }
  981. if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
  982. dev->wiphy.software_iftypes))
  983. goto nla_put_failure;
  984. if (nl80211_put_iface_combinations(&dev->wiphy, msg))
  985. goto nla_put_failure;
  986. if ((dev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
  987. nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
  988. dev->wiphy.ap_sme_capa))
  989. goto nla_put_failure;
  990. if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS,
  991. dev->wiphy.features))
  992. goto nla_put_failure;
  993. if (dev->wiphy.ht_capa_mod_mask &&
  994. nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
  995. sizeof(*dev->wiphy.ht_capa_mod_mask),
  996. dev->wiphy.ht_capa_mod_mask))
  997. goto nla_put_failure;
  998. return genlmsg_end(msg, hdr);
  999. nla_put_failure:
  1000. genlmsg_cancel(msg, hdr);
  1001. return -EMSGSIZE;
  1002. }
  1003. static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
  1004. {
  1005. int idx = 0;
  1006. int start = cb->args[0];
  1007. struct cfg80211_registered_device *dev;
  1008. mutex_lock(&cfg80211_mutex);
  1009. list_for_each_entry(dev, &cfg80211_rdev_list, list) {
  1010. if (!net_eq(wiphy_net(&dev->wiphy), sock_net(skb->sk)))
  1011. continue;
  1012. if (++idx <= start)
  1013. continue;
  1014. if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).pid,
  1015. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  1016. dev) < 0) {
  1017. idx--;
  1018. break;
  1019. }
  1020. }
  1021. mutex_unlock(&cfg80211_mutex);
  1022. cb->args[0] = idx;
  1023. return skb->len;
  1024. }
  1025. static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
  1026. {
  1027. struct sk_buff *msg;
  1028. struct cfg80211_registered_device *dev = info->user_ptr[0];
  1029. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  1030. if (!msg)
  1031. return -ENOMEM;
  1032. if (nl80211_send_wiphy(msg, info->snd_pid, info->snd_seq, 0, dev) < 0) {
  1033. nlmsg_free(msg);
  1034. return -ENOBUFS;
  1035. }
  1036. return genlmsg_reply(msg, info);
  1037. }
  1038. static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
  1039. [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 },
  1040. [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 },
  1041. [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
  1042. [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
  1043. [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
  1044. };
  1045. static int parse_txq_params(struct nlattr *tb[],
  1046. struct ieee80211_txq_params *txq_params)
  1047. {
  1048. if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
  1049. !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
  1050. !tb[NL80211_TXQ_ATTR_AIFS])
  1051. return -EINVAL;
  1052. txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
  1053. txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
  1054. txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
  1055. txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
  1056. txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
  1057. if (txq_params->ac >= NL80211_NUM_ACS)
  1058. return -EINVAL;
  1059. return 0;
  1060. }
  1061. static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
  1062. {
  1063. /*
  1064. * You can only set the channel explicitly for WDS interfaces,
  1065. * all others have their channel managed via their respective
  1066. * "establish a connection" command (connect, join, ...)
  1067. *
  1068. * For AP/GO and mesh mode, the channel can be set with the
  1069. * channel userspace API, but is only stored and passed to the
  1070. * low-level driver when the AP starts or the mesh is joined.
  1071. * This is for backward compatibility, userspace can also give
  1072. * the channel in the start-ap or join-mesh commands instead.
  1073. *
  1074. * Monitors are special as they are normally slaved to
  1075. * whatever else is going on, so they have their own special
  1076. * operation to set the monitor channel if possible.
  1077. */
  1078. return !wdev ||
  1079. wdev->iftype == NL80211_IFTYPE_AP ||
  1080. wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
  1081. wdev->iftype == NL80211_IFTYPE_MONITOR ||
  1082. wdev->iftype == NL80211_IFTYPE_P2P_GO;
  1083. }
  1084. static bool nl80211_valid_channel_type(struct genl_info *info,
  1085. enum nl80211_channel_type *channel_type)
  1086. {
  1087. enum nl80211_channel_type tmp;
  1088. if (!info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
  1089. return false;
  1090. tmp = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
  1091. if (tmp != NL80211_CHAN_NO_HT &&
  1092. tmp != NL80211_CHAN_HT20 &&
  1093. tmp != NL80211_CHAN_HT40PLUS &&
  1094. tmp != NL80211_CHAN_HT40MINUS)
  1095. return false;
  1096. if (channel_type)
  1097. *channel_type = tmp;
  1098. return true;
  1099. }
  1100. static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
  1101. struct wireless_dev *wdev,
  1102. struct genl_info *info)
  1103. {
  1104. struct ieee80211_channel *channel;
  1105. enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
  1106. u32 freq;
  1107. int result;
  1108. enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
  1109. if (wdev)
  1110. iftype = wdev->iftype;
  1111. if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
  1112. return -EINVAL;
  1113. if (!nl80211_can_set_dev_channel(wdev))
  1114. return -EOPNOTSUPP;
  1115. if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
  1116. !nl80211_valid_channel_type(info, &channel_type))
  1117. return -EINVAL;
  1118. freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
  1119. mutex_lock(&rdev->devlist_mtx);
  1120. switch (iftype) {
  1121. case NL80211_IFTYPE_AP:
  1122. case NL80211_IFTYPE_P2P_GO:
  1123. if (wdev->beacon_interval) {
  1124. result = -EBUSY;
  1125. break;
  1126. }
  1127. channel = rdev_freq_to_chan(rdev, freq, channel_type);
  1128. if (!channel || !cfg80211_can_beacon_sec_chan(&rdev->wiphy,
  1129. channel,
  1130. channel_type)) {
  1131. result = -EINVAL;
  1132. break;
  1133. }
  1134. wdev->preset_chan = channel;
  1135. wdev->preset_chantype = channel_type;
  1136. result = 0;
  1137. break;
  1138. case NL80211_IFTYPE_MESH_POINT:
  1139. result = cfg80211_set_mesh_freq(rdev, wdev, freq, channel_type);
  1140. break;
  1141. case NL80211_IFTYPE_MONITOR:
  1142. result = cfg80211_set_monitor_channel(rdev, freq, channel_type);
  1143. break;
  1144. default:
  1145. result = -EINVAL;
  1146. }
  1147. mutex_unlock(&rdev->devlist_mtx);
  1148. return result;
  1149. }
  1150. static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
  1151. {
  1152. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1153. struct net_device *netdev = info->user_ptr[1];
  1154. return __nl80211_set_channel(rdev, netdev->ieee80211_ptr, info);
  1155. }
  1156. static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info)
  1157. {
  1158. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1159. struct net_device *dev = info->user_ptr[1];
  1160. struct wireless_dev *wdev = dev->ieee80211_ptr;
  1161. const u8 *bssid;
  1162. if (!info->attrs[NL80211_ATTR_MAC])
  1163. return -EINVAL;
  1164. if (netif_running(dev))
  1165. return -EBUSY;
  1166. if (!rdev->ops->set_wds_peer)
  1167. return -EOPNOTSUPP;
  1168. if (wdev->iftype != NL80211_IFTYPE_WDS)
  1169. return -EOPNOTSUPP;
  1170. bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  1171. return rdev->ops->set_wds_peer(wdev->wiphy, dev, bssid);
  1172. }
  1173. static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
  1174. {
  1175. struct cfg80211_registered_device *rdev;
  1176. struct net_device *netdev = NULL;
  1177. struct wireless_dev *wdev;
  1178. int result = 0, rem_txq_params = 0;
  1179. struct nlattr *nl_txq_params;
  1180. u32 changed;
  1181. u8 retry_short = 0, retry_long = 0;
  1182. u32 frag_threshold = 0, rts_threshold = 0;
  1183. u8 coverage_class = 0;
  1184. /*
  1185. * Try to find the wiphy and netdev. Normally this
  1186. * function shouldn't need the netdev, but this is
  1187. * done for backward compatibility -- previously
  1188. * setting the channel was done per wiphy, but now
  1189. * it is per netdev. Previous userland like hostapd
  1190. * also passed a netdev to set_wiphy, so that it is
  1191. * possible to let that go to the right netdev!
  1192. */
  1193. mutex_lock(&cfg80211_mutex);
  1194. if (info->attrs[NL80211_ATTR_IFINDEX]) {
  1195. int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
  1196. netdev = dev_get_by_index(genl_info_net(info), ifindex);
  1197. if (netdev && netdev->ieee80211_ptr) {
  1198. rdev = wiphy_to_dev(netdev->ieee80211_ptr->wiphy);
  1199. mutex_lock(&rdev->mtx);
  1200. } else
  1201. netdev = NULL;
  1202. }
  1203. if (!netdev) {
  1204. rdev = __cfg80211_rdev_from_info(genl_info_net(info), info);
  1205. if (IS_ERR(rdev)) {
  1206. mutex_unlock(&cfg80211_mutex);
  1207. return PTR_ERR(rdev);
  1208. }
  1209. wdev = NULL;
  1210. netdev = NULL;
  1211. result = 0;
  1212. mutex_lock(&rdev->mtx);
  1213. } else if (nl80211_can_set_dev_channel(netdev->ieee80211_ptr))
  1214. wdev = netdev->ieee80211_ptr;
  1215. else
  1216. wdev = NULL;
  1217. /*
  1218. * end workaround code, by now the rdev is available
  1219. * and locked, and wdev may or may not be NULL.
  1220. */
  1221. if (info->attrs[NL80211_ATTR_WIPHY_NAME])
  1222. result = cfg80211_dev_rename(
  1223. rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
  1224. mutex_unlock(&cfg80211_mutex);
  1225. if (result)
  1226. goto bad_res;
  1227. if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
  1228. struct ieee80211_txq_params txq_params;
  1229. struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];
  1230. if (!rdev->ops->set_txq_params) {
  1231. result = -EOPNOTSUPP;
  1232. goto bad_res;
  1233. }
  1234. if (!netdev) {
  1235. result = -EINVAL;
  1236. goto bad_res;
  1237. }
  1238. if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  1239. netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
  1240. result = -EINVAL;
  1241. goto bad_res;
  1242. }
  1243. if (!netif_running(netdev)) {
  1244. result = -ENETDOWN;
  1245. goto bad_res;
  1246. }
  1247. nla_for_each_nested(nl_txq_params,
  1248. info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
  1249. rem_txq_params) {
  1250. nla_parse(tb, NL80211_TXQ_ATTR_MAX,
  1251. nla_data(nl_txq_params),
  1252. nla_len(nl_txq_params),
  1253. txq_params_policy);
  1254. result = parse_txq_params(tb, &txq_params);
  1255. if (result)
  1256. goto bad_res;
  1257. result = rdev->ops->set_txq_params(&rdev->wiphy,
  1258. netdev,
  1259. &txq_params);
  1260. if (result)
  1261. goto bad_res;
  1262. }
  1263. }
  1264. if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
  1265. result = __nl80211_set_channel(rdev, wdev, info);
  1266. if (result)
  1267. goto bad_res;
  1268. }
  1269. if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
  1270. enum nl80211_tx_power_setting type;
  1271. int idx, mbm = 0;
  1272. if (!rdev->ops->set_tx_power) {
  1273. result = -EOPNOTSUPP;
  1274. goto bad_res;
  1275. }
  1276. idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
  1277. type = nla_get_u32(info->attrs[idx]);
  1278. if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
  1279. (type != NL80211_TX_POWER_AUTOMATIC)) {
  1280. result = -EINVAL;
  1281. goto bad_res;
  1282. }
  1283. if (type != NL80211_TX_POWER_AUTOMATIC) {
  1284. idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
  1285. mbm = nla_get_u32(info->attrs[idx]);
  1286. }
  1287. result = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
  1288. if (result)
  1289. goto bad_res;
  1290. }
  1291. if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
  1292. info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
  1293. u32 tx_ant, rx_ant;
  1294. if ((!rdev->wiphy.available_antennas_tx &&
  1295. !rdev->wiphy.available_antennas_rx) ||
  1296. !rdev->ops->set_antenna) {
  1297. result = -EOPNOTSUPP;
  1298. goto bad_res;
  1299. }
  1300. tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
  1301. rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);
  1302. /* reject antenna configurations which don't match the
  1303. * available antenna masks, except for the "all" mask */
  1304. if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
  1305. (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
  1306. result = -EINVAL;
  1307. goto bad_res;
  1308. }
  1309. tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
  1310. rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;
  1311. result = rdev->ops->set_antenna(&rdev->wiphy, tx_ant, rx_ant);
  1312. if (result)
  1313. goto bad_res;
  1314. }
  1315. changed = 0;
  1316. if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
  1317. retry_short = nla_get_u8(
  1318. info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);
  1319. if (retry_short == 0) {
  1320. result = -EINVAL;
  1321. goto bad_res;
  1322. }
  1323. changed |= WIPHY_PARAM_RETRY_SHORT;
  1324. }
  1325. if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
  1326. retry_long = nla_get_u8(
  1327. info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);
  1328. if (retry_long == 0) {
  1329. result = -EINVAL;
  1330. goto bad_res;
  1331. }
  1332. changed |= WIPHY_PARAM_RETRY_LONG;
  1333. }
  1334. if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
  1335. frag_threshold = nla_get_u32(
  1336. info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
  1337. if (frag_threshold < 256) {
  1338. result = -EINVAL;
  1339. goto bad_res;
  1340. }
  1341. if (frag_threshold != (u32) -1) {
  1342. /*
  1343. * Fragments (apart from the last one) are required to
  1344. * have even length. Make the fragmentation code
  1345. * simpler by stripping LSB should someone try to use
  1346. * odd threshold value.
  1347. */
  1348. frag_threshold &= ~0x1;
  1349. }
  1350. changed |= WIPHY_PARAM_FRAG_THRESHOLD;
  1351. }
  1352. if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
  1353. rts_threshold = nla_get_u32(
  1354. info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
  1355. changed |= WIPHY_PARAM_RTS_THRESHOLD;
  1356. }
  1357. if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
  1358. coverage_class = nla_get_u8(
  1359. info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
  1360. changed |= WIPHY_PARAM_COVERAGE_CLASS;
  1361. }
  1362. if (changed) {
  1363. u8 old_retry_short, old_retry_long;
  1364. u32 old_frag_threshold, old_rts_threshold;
  1365. u8 old_coverage_class;
  1366. if (!rdev->ops->set_wiphy_params) {
  1367. result = -EOPNOTSUPP;
  1368. goto bad_res;
  1369. }
  1370. old_retry_short = rdev->wiphy.retry_short;
  1371. old_retry_long = rdev->wiphy.retry_long;
  1372. old_frag_threshold = rdev->wiphy.frag_threshold;
  1373. old_rts_threshold = rdev->wiphy.rts_threshold;
  1374. old_coverage_class = rdev->wiphy.coverage_class;
  1375. if (changed & WIPHY_PARAM_RETRY_SHORT)
  1376. rdev->wiphy.retry_short = retry_short;
  1377. if (changed & WIPHY_PARAM_RETRY_LONG)
  1378. rdev->wiphy.retry_long = retry_long;
  1379. if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
  1380. rdev->wiphy.frag_threshold = frag_threshold;
  1381. if (changed & WIPHY_PARAM_RTS_THRESHOLD)
  1382. rdev->wiphy.rts_threshold = rts_threshold;
  1383. if (changed & WIPHY_PARAM_COVERAGE_CLASS)
  1384. rdev->wiphy.coverage_class = coverage_class;
  1385. result = rdev->ops->set_wiphy_params(&rdev->wiphy, changed);
  1386. if (result) {
  1387. rdev->wiphy.retry_short = old_retry_short;
  1388. rdev->wiphy.retry_long = old_retry_long;
  1389. rdev->wiphy.frag_threshold = old_frag_threshold;
  1390. rdev->wiphy.rts_threshold = old_rts_threshold;
  1391. rdev->wiphy.coverage_class = old_coverage_class;
  1392. }
  1393. }
  1394. bad_res:
  1395. mutex_unlock(&rdev->mtx);
  1396. if (netdev)
  1397. dev_put(netdev);
  1398. return result;
  1399. }
  1400. static int nl80211_send_iface(struct sk_buff *msg, u32 pid, u32 seq, int flags,
  1401. struct cfg80211_registered_device *rdev,
  1402. struct net_device *dev)
  1403. {
  1404. void *hdr;
  1405. hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_INTERFACE);
  1406. if (!hdr)
  1407. return -1;
  1408. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  1409. nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  1410. nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name) ||
  1411. nla_put_u32(msg, NL80211_ATTR_IFTYPE,
  1412. dev->ieee80211_ptr->iftype) ||
  1413. nla_put_u32(msg, NL80211_ATTR_GENERATION,
  1414. rdev->devlist_generation ^
  1415. (cfg80211_rdev_list_generation << 2)))
  1416. goto nla_put_failure;
  1417. if (rdev->ops->get_channel) {
  1418. struct ieee80211_channel *chan;
  1419. enum nl80211_channel_type channel_type;
  1420. chan = rdev->ops->get_channel(&rdev->wiphy, &channel_type);
  1421. if (chan &&
  1422. (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
  1423. chan->center_freq) ||
  1424. nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
  1425. channel_type)))
  1426. goto nla_put_failure;
  1427. }
  1428. return genlmsg_end(msg, hdr);
  1429. nla_put_failure:
  1430. genlmsg_cancel(msg, hdr);
  1431. return -EMSGSIZE;
  1432. }
  1433. static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
  1434. {
  1435. int wp_idx = 0;
  1436. int if_idx = 0;
  1437. int wp_start = cb->args[0];
  1438. int if_start = cb->args[1];
  1439. struct cfg80211_registered_device *rdev;
  1440. struct wireless_dev *wdev;
  1441. mutex_lock(&cfg80211_mutex);
  1442. list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
  1443. if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
  1444. continue;
  1445. if (wp_idx < wp_start) {
  1446. wp_idx++;
  1447. continue;
  1448. }
  1449. if_idx = 0;
  1450. mutex_lock(&rdev->devlist_mtx);
  1451. list_for_each_entry(wdev, &rdev->netdev_list, list) {
  1452. if (if_idx < if_start) {
  1453. if_idx++;
  1454. continue;
  1455. }
  1456. if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).pid,
  1457. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  1458. rdev, wdev->netdev) < 0) {
  1459. mutex_unlock(&rdev->devlist_mtx);
  1460. goto out;
  1461. }
  1462. if_idx++;
  1463. }
  1464. mutex_unlock(&rdev->devlist_mtx);
  1465. wp_idx++;
  1466. }
  1467. out:
  1468. mutex_unlock(&cfg80211_mutex);
  1469. cb->args[0] = wp_idx;
  1470. cb->args[1] = if_idx;
  1471. return skb->len;
  1472. }
  1473. static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
  1474. {
  1475. struct sk_buff *msg;
  1476. struct cfg80211_registered_device *dev = info->user_ptr[0];
  1477. struct net_device *netdev = info->user_ptr[1];
  1478. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  1479. if (!msg)
  1480. return -ENOMEM;
  1481. if (nl80211_send_iface(msg, info->snd_pid, info->snd_seq, 0,
  1482. dev, netdev) < 0) {
  1483. nlmsg_free(msg);
  1484. return -ENOBUFS;
  1485. }
  1486. return genlmsg_reply(msg, info);
  1487. }
  1488. static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
  1489. [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
  1490. [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
  1491. [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
  1492. [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
  1493. [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
  1494. };
  1495. static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
  1496. {
  1497. struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
  1498. int flag;
  1499. *mntrflags = 0;
  1500. if (!nla)
  1501. return -EINVAL;
  1502. if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX,
  1503. nla, mntr_flags_policy))
  1504. return -EINVAL;
  1505. for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
  1506. if (flags[flag])
  1507. *mntrflags |= (1<<flag);
  1508. return 0;
  1509. }
  1510. static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
  1511. struct net_device *netdev, u8 use_4addr,
  1512. enum nl80211_iftype iftype)
  1513. {
  1514. if (!use_4addr) {
  1515. if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT))
  1516. return -EBUSY;
  1517. return 0;
  1518. }
  1519. switch (iftype) {
  1520. case NL80211_IFTYPE_AP_VLAN:
  1521. if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
  1522. return 0;
  1523. break;
  1524. case NL80211_IFTYPE_STATION:
  1525. if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
  1526. return 0;
  1527. break;
  1528. default:
  1529. break;
  1530. }
  1531. return -EOPNOTSUPP;
  1532. }
  1533. static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
  1534. {
  1535. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1536. struct vif_params params;
  1537. int err;
  1538. enum nl80211_iftype otype, ntype;
  1539. struct net_device *dev = info->user_ptr[1];
  1540. u32 _flags, *flags = NULL;
  1541. bool change = false;
  1542. memset(&params, 0, sizeof(params));
  1543. otype = ntype = dev->ieee80211_ptr->iftype;
  1544. if (info->attrs[NL80211_ATTR_IFTYPE]) {
  1545. ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
  1546. if (otype != ntype)
  1547. change = true;
  1548. if (ntype > NL80211_IFTYPE_MAX)
  1549. return -EINVAL;
  1550. }
  1551. if (info->attrs[NL80211_ATTR_MESH_ID]) {
  1552. struct wireless_dev *wdev = dev->ieee80211_ptr;
  1553. if (ntype != NL80211_IFTYPE_MESH_POINT)
  1554. return -EINVAL;
  1555. if (netif_running(dev))
  1556. return -EBUSY;
  1557. wdev_lock(wdev);
  1558. BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
  1559. IEEE80211_MAX_MESH_ID_LEN);
  1560. wdev->mesh_id_up_len =
  1561. nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
  1562. memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
  1563. wdev->mesh_id_up_len);
  1564. wdev_unlock(wdev);
  1565. }
  1566. if (info->attrs[NL80211_ATTR_4ADDR]) {
  1567. params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
  1568. change = true;
  1569. err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
  1570. if (err)
  1571. return err;
  1572. } else {
  1573. params.use_4addr = -1;
  1574. }
  1575. if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
  1576. if (ntype != NL80211_IFTYPE_MONITOR)
  1577. return -EINVAL;
  1578. err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
  1579. &_flags);
  1580. if (err)
  1581. return err;
  1582. flags = &_flags;
  1583. change = true;
  1584. }
  1585. if (change)
  1586. err = cfg80211_change_iface(rdev, dev, ntype, flags, &params);
  1587. else
  1588. err = 0;
  1589. if (!err && params.use_4addr != -1)
  1590. dev->ieee80211_ptr->use_4addr = params.use_4addr;
  1591. return err;
  1592. }
  1593. static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
  1594. {
  1595. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1596. struct vif_params params;
  1597. struct net_device *dev;
  1598. int err;
  1599. enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;
  1600. u32 flags;
  1601. memset(&params, 0, sizeof(params));
  1602. if (!info->attrs[NL80211_ATTR_IFNAME])
  1603. return -EINVAL;
  1604. if (info->attrs[NL80211_ATTR_IFTYPE]) {
  1605. type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
  1606. if (type > NL80211_IFTYPE_MAX)
  1607. return -EINVAL;
  1608. }
  1609. if (!rdev->ops->add_virtual_intf ||
  1610. !(rdev->wiphy.interface_modes & (1 << type)))
  1611. return -EOPNOTSUPP;
  1612. if (info->attrs[NL80211_ATTR_4ADDR]) {
  1613. params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
  1614. err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
  1615. if (err)
  1616. return err;
  1617. }
  1618. err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ?
  1619. info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL,
  1620. &flags);
  1621. dev = rdev->ops->add_virtual_intf(&rdev->wiphy,
  1622. nla_data(info->attrs[NL80211_ATTR_IFNAME]),
  1623. type, err ? NULL : &flags, &params);
  1624. if (IS_ERR(dev))
  1625. return PTR_ERR(dev);
  1626. if (type == NL80211_IFTYPE_MESH_POINT &&
  1627. info->attrs[NL80211_ATTR_MESH_ID]) {
  1628. struct wireless_dev *wdev = dev->ieee80211_ptr;
  1629. wdev_lock(wdev);
  1630. BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN !=
  1631. IEEE80211_MAX_MESH_ID_LEN);
  1632. wdev->mesh_id_up_len =
  1633. nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
  1634. memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
  1635. wdev->mesh_id_up_len);
  1636. wdev_unlock(wdev);
  1637. }
  1638. return 0;
  1639. }
  1640. static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
  1641. {
  1642. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1643. struct net_device *dev = info->user_ptr[1];
  1644. if (!rdev->ops->del_virtual_intf)
  1645. return -EOPNOTSUPP;
  1646. return rdev->ops->del_virtual_intf(&rdev->wiphy, dev);
  1647. }
  1648. static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
  1649. {
  1650. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1651. struct net_device *dev = info->user_ptr[1];
  1652. u16 noack_map;
  1653. if (!info->attrs[NL80211_ATTR_NOACK_MAP])
  1654. return -EINVAL;
  1655. if (!rdev->ops->set_noack_map)
  1656. return -EOPNOTSUPP;
  1657. noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);
  1658. return rdev->ops->set_noack_map(&rdev->wiphy, dev, noack_map);
  1659. }
  1660. struct get_key_cookie {
  1661. struct sk_buff *msg;
  1662. int error;
  1663. int idx;
  1664. };
  1665. static void get_key_callback(void *c, struct key_params *params)
  1666. {
  1667. struct nlattr *key;
  1668. struct get_key_cookie *cookie = c;
  1669. if ((params->key &&
  1670. nla_put(cookie->msg, NL80211_ATTR_KEY_DATA,
  1671. params->key_len, params->key)) ||
  1672. (params->seq &&
  1673. nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
  1674. params->seq_len, params->seq)) ||
  1675. (params->cipher &&
  1676. nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
  1677. params->cipher)))
  1678. goto nla_put_failure;
  1679. key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY);
  1680. if (!key)
  1681. goto nla_put_failure;
  1682. if ((params->key &&
  1683. nla_put(cookie->msg, NL80211_KEY_DATA,
  1684. params->key_len, params->key)) ||
  1685. (params->seq &&
  1686. nla_put(cookie->msg, NL80211_KEY_SEQ,
  1687. params->seq_len, params->seq)) ||
  1688. (params->cipher &&
  1689. nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
  1690. params->cipher)))
  1691. goto nla_put_failure;
  1692. if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx))
  1693. goto nla_put_failure;
  1694. nla_nest_end(cookie->msg, key);
  1695. return;
  1696. nla_put_failure:
  1697. cookie->error = 1;
  1698. }
  1699. static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
  1700. {
  1701. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1702. int err;
  1703. struct net_device *dev = info->user_ptr[1];
  1704. u8 key_idx = 0;
  1705. const u8 *mac_addr = NULL;
  1706. bool pairwise;
  1707. struct get_key_cookie cookie = {
  1708. .error = 0,
  1709. };
  1710. void *hdr;
  1711. struct sk_buff *msg;
  1712. if (info->attrs[NL80211_ATTR_KEY_IDX])
  1713. key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);
  1714. if (key_idx > 5)
  1715. return -EINVAL;
  1716. if (info->attrs[NL80211_ATTR_MAC])
  1717. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  1718. pairwise = !!mac_addr;
  1719. if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
  1720. u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);
  1721. if (kt >= NUM_NL80211_KEYTYPES)
  1722. return -EINVAL;
  1723. if (kt != NL80211_KEYTYPE_GROUP &&
  1724. kt != NL80211_KEYTYPE_PAIRWISE)
  1725. return -EINVAL;
  1726. pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
  1727. }
  1728. if (!rdev->ops->get_key)
  1729. return -EOPNOTSUPP;
  1730. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  1731. if (!msg)
  1732. return -ENOMEM;
  1733. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  1734. NL80211_CMD_NEW_KEY);
  1735. if (IS_ERR(hdr))
  1736. return PTR_ERR(hdr);
  1737. cookie.msg = msg;
  1738. cookie.idx = key_idx;
  1739. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  1740. nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
  1741. goto nla_put_failure;
  1742. if (mac_addr &&
  1743. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
  1744. goto nla_put_failure;
  1745. if (pairwise && mac_addr &&
  1746. !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
  1747. return -ENOENT;
  1748. err = rdev->ops->get_key(&rdev->wiphy, dev, key_idx, pairwise,
  1749. mac_addr, &cookie, get_key_callback);
  1750. if (err)
  1751. goto free_msg;
  1752. if (cookie.error)
  1753. goto nla_put_failure;
  1754. genlmsg_end(msg, hdr);
  1755. return genlmsg_reply(msg, info);
  1756. nla_put_failure:
  1757. err = -ENOBUFS;
  1758. free_msg:
  1759. nlmsg_free(msg);
  1760. return err;
  1761. }
  1762. static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
  1763. {
  1764. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1765. struct key_parse key;
  1766. int err;
  1767. struct net_device *dev = info->user_ptr[1];
  1768. err = nl80211_parse_key(info, &key);
  1769. if (err)
  1770. return err;
  1771. if (key.idx < 0)
  1772. return -EINVAL;
  1773. /* only support setting default key */
  1774. if (!key.def && !key.defmgmt)
  1775. return -EINVAL;
  1776. wdev_lock(dev->ieee80211_ptr);
  1777. if (key.def) {
  1778. if (!rdev->ops->set_default_key) {
  1779. err = -EOPNOTSUPP;
  1780. goto out;
  1781. }
  1782. err = nl80211_key_allowed(dev->ieee80211_ptr);
  1783. if (err)
  1784. goto out;
  1785. err = rdev->ops->set_default_key(&rdev->wiphy, dev, key.idx,
  1786. key.def_uni, key.def_multi);
  1787. if (err)
  1788. goto out;
  1789. #ifdef CONFIG_CFG80211_WEXT
  1790. dev->ieee80211_ptr->wext.default_key = key.idx;
  1791. #endif
  1792. } else {
  1793. if (key.def_uni || !key.def_multi) {
  1794. err = -EINVAL;
  1795. goto out;
  1796. }
  1797. if (!rdev->ops->set_default_mgmt_key) {
  1798. err = -EOPNOTSUPP;
  1799. goto out;
  1800. }
  1801. err = nl80211_key_allowed(dev->ieee80211_ptr);
  1802. if (err)
  1803. goto out;
  1804. err = rdev->ops->set_default_mgmt_key(&rdev->wiphy,
  1805. dev, key.idx);
  1806. if (err)
  1807. goto out;
  1808. #ifdef CONFIG_CFG80211_WEXT
  1809. dev->ieee80211_ptr->wext.default_mgmt_key = key.idx;
  1810. #endif
  1811. }
  1812. out:
  1813. wdev_unlock(dev->ieee80211_ptr);
  1814. return err;
  1815. }
  1816. static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
  1817. {
  1818. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1819. int err;
  1820. struct net_device *dev = info->user_ptr[1];
  1821. struct key_parse key;
  1822. const u8 *mac_addr = NULL;
  1823. err = nl80211_parse_key(info, &key);
  1824. if (err)
  1825. return err;
  1826. if (!key.p.key)
  1827. return -EINVAL;
  1828. if (info->attrs[NL80211_ATTR_MAC])
  1829. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  1830. if (key.type == -1) {
  1831. if (mac_addr)
  1832. key.type = NL80211_KEYTYPE_PAIRWISE;
  1833. else
  1834. key.type = NL80211_KEYTYPE_GROUP;
  1835. }
  1836. /* for now */
  1837. if (key.type != NL80211_KEYTYPE_PAIRWISE &&
  1838. key.type != NL80211_KEYTYPE_GROUP)
  1839. return -EINVAL;
  1840. if (!rdev->ops->add_key)
  1841. return -EOPNOTSUPP;
  1842. if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
  1843. key.type == NL80211_KEYTYPE_PAIRWISE,
  1844. mac_addr))
  1845. return -EINVAL;
  1846. wdev_lock(dev->ieee80211_ptr);
  1847. err = nl80211_key_allowed(dev->ieee80211_ptr);
  1848. if (!err)
  1849. err = rdev->ops->add_key(&rdev->wiphy, dev, key.idx,
  1850. key.type == NL80211_KEYTYPE_PAIRWISE,
  1851. mac_addr, &key.p);
  1852. wdev_unlock(dev->ieee80211_ptr);
  1853. return err;
  1854. }
  1855. static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
  1856. {
  1857. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1858. int err;
  1859. struct net_device *dev = info->user_ptr[1];
  1860. u8 *mac_addr = NULL;
  1861. struct key_parse key;
  1862. err = nl80211_parse_key(info, &key);
  1863. if (err)
  1864. return err;
  1865. if (info->attrs[NL80211_ATTR_MAC])
  1866. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  1867. if (key.type == -1) {
  1868. if (mac_addr)
  1869. key.type = NL80211_KEYTYPE_PAIRWISE;
  1870. else
  1871. key.type = NL80211_KEYTYPE_GROUP;
  1872. }
  1873. /* for now */
  1874. if (key.type != NL80211_KEYTYPE_PAIRWISE &&
  1875. key.type != NL80211_KEYTYPE_GROUP)
  1876. return -EINVAL;
  1877. if (!rdev->ops->del_key)
  1878. return -EOPNOTSUPP;
  1879. wdev_lock(dev->ieee80211_ptr);
  1880. err = nl80211_key_allowed(dev->ieee80211_ptr);
  1881. if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
  1882. !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
  1883. err = -ENOENT;
  1884. if (!err)
  1885. err = rdev->ops->del_key(&rdev->wiphy, dev, key.idx,
  1886. key.type == NL80211_KEYTYPE_PAIRWISE,
  1887. mac_addr);
  1888. #ifdef CONFIG_CFG80211_WEXT
  1889. if (!err) {
  1890. if (key.idx == dev->ieee80211_ptr->wext.default_key)
  1891. dev->ieee80211_ptr->wext.default_key = -1;
  1892. else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key)
  1893. dev->ieee80211_ptr->wext.default_mgmt_key = -1;
  1894. }
  1895. #endif
  1896. wdev_unlock(dev->ieee80211_ptr);
  1897. return err;
  1898. }
  1899. static int nl80211_parse_beacon(struct genl_info *info,
  1900. struct cfg80211_beacon_data *bcn)
  1901. {
  1902. bool haveinfo = false;
  1903. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_BEACON_TAIL]) ||
  1904. !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]) ||
  1905. !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_PROBE_RESP]) ||
  1906. !is_valid_ie_attr(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]))
  1907. return -EINVAL;
  1908. memset(bcn, 0, sizeof(*bcn));
  1909. if (info->attrs[NL80211_ATTR_BEACON_HEAD]) {
  1910. bcn->head = nla_data(info->attrs[NL80211_ATTR_BEACON_HEAD]);
  1911. bcn->head_len = nla_len(info->attrs[NL80211_ATTR_BEACON_HEAD]);
  1912. if (!bcn->head_len)
  1913. return -EINVAL;
  1914. haveinfo = true;
  1915. }
  1916. if (info->attrs[NL80211_ATTR_BEACON_TAIL]) {
  1917. bcn->tail = nla_data(info->attrs[NL80211_ATTR_BEACON_TAIL]);
  1918. bcn->tail_len =
  1919. nla_len(info->attrs[NL80211_ATTR_BEACON_TAIL]);
  1920. haveinfo = true;
  1921. }
  1922. if (!haveinfo)
  1923. return -EINVAL;
  1924. if (info->attrs[NL80211_ATTR_IE]) {
  1925. bcn->beacon_ies = nla_data(info->attrs[NL80211_ATTR_IE]);
  1926. bcn->beacon_ies_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  1927. }
  1928. if (info->attrs[NL80211_ATTR_IE_PROBE_RESP]) {
  1929. bcn->proberesp_ies =
  1930. nla_data(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
  1931. bcn->proberesp_ies_len =
  1932. nla_len(info->attrs[NL80211_ATTR_IE_PROBE_RESP]);
  1933. }
  1934. if (info->attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
  1935. bcn->assocresp_ies =
  1936. nla_data(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
  1937. bcn->assocresp_ies_len =
  1938. nla_len(info->attrs[NL80211_ATTR_IE_ASSOC_RESP]);
  1939. }
  1940. if (info->attrs[NL80211_ATTR_PROBE_RESP]) {
  1941. bcn->probe_resp =
  1942. nla_data(info->attrs[NL80211_ATTR_PROBE_RESP]);
  1943. bcn->probe_resp_len =
  1944. nla_len(info->attrs[NL80211_ATTR_PROBE_RESP]);
  1945. }
  1946. return 0;
  1947. }
  1948. static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
  1949. {
  1950. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  1951. struct net_device *dev = info->user_ptr[1];
  1952. struct wireless_dev *wdev = dev->ieee80211_ptr;
  1953. struct cfg80211_ap_settings params;
  1954. int err;
  1955. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  1956. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  1957. return -EOPNOTSUPP;
  1958. if (!rdev->ops->start_ap)
  1959. return -EOPNOTSUPP;
  1960. if (wdev->beacon_interval)
  1961. return -EALREADY;
  1962. memset(&params, 0, sizeof(params));
  1963. /* these are required for START_AP */
  1964. if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
  1965. !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
  1966. !info->attrs[NL80211_ATTR_BEACON_HEAD])
  1967. return -EINVAL;
  1968. err = nl80211_parse_beacon(info, &params.beacon);
  1969. if (err)
  1970. return err;
  1971. params.beacon_interval =
  1972. nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
  1973. params.dtim_period =
  1974. nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
  1975. err = cfg80211_validate_beacon_int(rdev, params.beacon_interval);
  1976. if (err)
  1977. return err;
  1978. /*
  1979. * In theory, some of these attributes should be required here
  1980. * but since they were not used when the command was originally
  1981. * added, keep them optional for old user space programs to let
  1982. * them continue to work with drivers that do not need the
  1983. * additional information -- drivers must check!
  1984. */
  1985. if (info->attrs[NL80211_ATTR_SSID]) {
  1986. params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
  1987. params.ssid_len =
  1988. nla_len(info->attrs[NL80211_ATTR_SSID]);
  1989. if (params.ssid_len == 0 ||
  1990. params.ssid_len > IEEE80211_MAX_SSID_LEN)
  1991. return -EINVAL;
  1992. }
  1993. if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) {
  1994. params.hidden_ssid = nla_get_u32(
  1995. info->attrs[NL80211_ATTR_HIDDEN_SSID]);
  1996. if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE &&
  1997. params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN &&
  1998. params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS)
  1999. return -EINVAL;
  2000. }
  2001. params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
  2002. if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
  2003. params.auth_type = nla_get_u32(
  2004. info->attrs[NL80211_ATTR_AUTH_TYPE]);
  2005. if (!nl80211_valid_auth_type(params.auth_type))
  2006. return -EINVAL;
  2007. } else
  2008. params.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
  2009. err = nl80211_crypto_settings(rdev, info, &params.crypto,
  2010. NL80211_MAX_NR_CIPHER_SUITES);
  2011. if (err)
  2012. return err;
  2013. if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
  2014. if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER))
  2015. return -EOPNOTSUPP;
  2016. params.inactivity_timeout = nla_get_u16(
  2017. info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
  2018. }
  2019. if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
  2020. enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
  2021. if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
  2022. !nl80211_valid_channel_type(info, &channel_type))
  2023. return -EINVAL;
  2024. params.channel = rdev_freq_to_chan(rdev,
  2025. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
  2026. channel_type);
  2027. if (!params.channel)
  2028. return -EINVAL;
  2029. params.channel_type = channel_type;
  2030. } else if (wdev->preset_chan) {
  2031. params.channel = wdev->preset_chan;
  2032. params.channel_type = wdev->preset_chantype;
  2033. } else
  2034. return -EINVAL;
  2035. if (!cfg80211_can_beacon_sec_chan(&rdev->wiphy, params.channel,
  2036. params.channel_type))
  2037. return -EINVAL;
  2038. err = rdev->ops->start_ap(&rdev->wiphy, dev, &params);
  2039. if (!err)
  2040. wdev->beacon_interval = params.beacon_interval;
  2041. return err;
  2042. }
  2043. static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
  2044. {
  2045. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2046. struct net_device *dev = info->user_ptr[1];
  2047. struct wireless_dev *wdev = dev->ieee80211_ptr;
  2048. struct cfg80211_beacon_data params;
  2049. int err;
  2050. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  2051. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  2052. return -EOPNOTSUPP;
  2053. if (!rdev->ops->change_beacon)
  2054. return -EOPNOTSUPP;
  2055. if (!wdev->beacon_interval)
  2056. return -EINVAL;
  2057. err = nl80211_parse_beacon(info, &params);
  2058. if (err)
  2059. return err;
  2060. return rdev->ops->change_beacon(&rdev->wiphy, dev, &params);
  2061. }
  2062. static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
  2063. {
  2064. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2065. struct net_device *dev = info->user_ptr[1];
  2066. struct wireless_dev *wdev = dev->ieee80211_ptr;
  2067. int err;
  2068. if (!rdev->ops->stop_ap)
  2069. return -EOPNOTSUPP;
  2070. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  2071. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  2072. return -EOPNOTSUPP;
  2073. if (!wdev->beacon_interval)
  2074. return -ENOENT;
  2075. err = rdev->ops->stop_ap(&rdev->wiphy, dev);
  2076. if (!err)
  2077. wdev->beacon_interval = 0;
  2078. return err;
  2079. }
  2080. static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
  2081. [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
  2082. [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
  2083. [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
  2084. [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
  2085. [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
  2086. [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
  2087. };
  2088. static int parse_station_flags(struct genl_info *info,
  2089. enum nl80211_iftype iftype,
  2090. struct station_parameters *params)
  2091. {
  2092. struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
  2093. struct nlattr *nla;
  2094. int flag;
  2095. /*
  2096. * Try parsing the new attribute first so userspace
  2097. * can specify both for older kernels.
  2098. */
  2099. nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
  2100. if (nla) {
  2101. struct nl80211_sta_flag_update *sta_flags;
  2102. sta_flags = nla_data(nla);
  2103. params->sta_flags_mask = sta_flags->mask;
  2104. params->sta_flags_set = sta_flags->set;
  2105. if ((params->sta_flags_mask |
  2106. params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
  2107. return -EINVAL;
  2108. return 0;
  2109. }
  2110. /* if present, parse the old attribute */
  2111. nla = info->attrs[NL80211_ATTR_STA_FLAGS];
  2112. if (!nla)
  2113. return 0;
  2114. if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX,
  2115. nla, sta_flags_policy))
  2116. return -EINVAL;
  2117. /*
  2118. * Only allow certain flags for interface types so that
  2119. * other attributes are silently ignored. Remember that
  2120. * this is backward compatibility code with old userspace
  2121. * and shouldn't be hit in other cases anyway.
  2122. */
  2123. switch (iftype) {
  2124. case NL80211_IFTYPE_AP:
  2125. case NL80211_IFTYPE_AP_VLAN:
  2126. case NL80211_IFTYPE_P2P_GO:
  2127. params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
  2128. BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
  2129. BIT(NL80211_STA_FLAG_WME) |
  2130. BIT(NL80211_STA_FLAG_MFP);
  2131. break;
  2132. case NL80211_IFTYPE_P2P_CLIENT:
  2133. case NL80211_IFTYPE_STATION:
  2134. params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
  2135. BIT(NL80211_STA_FLAG_TDLS_PEER);
  2136. break;
  2137. case NL80211_IFTYPE_MESH_POINT:
  2138. params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
  2139. BIT(NL80211_STA_FLAG_MFP) |
  2140. BIT(NL80211_STA_FLAG_AUTHORIZED);
  2141. default:
  2142. return -EINVAL;
  2143. }
  2144. for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
  2145. if (flags[flag]) {
  2146. params->sta_flags_set |= (1<<flag);
  2147. /* no longer support new API additions in old API */
  2148. if (flag > NL80211_STA_FLAG_MAX_OLD_API)
  2149. return -EINVAL;
  2150. }
  2151. }
  2152. return 0;
  2153. }
  2154. static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info,
  2155. int attr)
  2156. {
  2157. struct nlattr *rate;
  2158. u16 bitrate;
  2159. rate = nla_nest_start(msg, attr);
  2160. if (!rate)
  2161. goto nla_put_failure;
  2162. /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
  2163. bitrate = cfg80211_calculate_bitrate(info);
  2164. if ((bitrate > 0 &&
  2165. nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate)) ||
  2166. ((info->flags & RATE_INFO_FLAGS_MCS) &&
  2167. nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) ||
  2168. ((info->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) &&
  2169. nla_put_flag(msg, NL80211_RATE_INFO_40_MHZ_WIDTH)) ||
  2170. ((info->flags & RATE_INFO_FLAGS_SHORT_GI) &&
  2171. nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)))
  2172. goto nla_put_failure;
  2173. nla_nest_end(msg, rate);
  2174. return true;
  2175. nla_put_failure:
  2176. return false;
  2177. }
  2178. static int nl80211_send_station(struct sk_buff *msg, u32 pid, u32 seq,
  2179. int flags,
  2180. struct cfg80211_registered_device *rdev,
  2181. struct net_device *dev,
  2182. const u8 *mac_addr, struct station_info *sinfo)
  2183. {
  2184. void *hdr;
  2185. struct nlattr *sinfoattr, *bss_param;
  2186. hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
  2187. if (!hdr)
  2188. return -1;
  2189. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  2190. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
  2191. nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
  2192. goto nla_put_failure;
  2193. sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO);
  2194. if (!sinfoattr)
  2195. goto nla_put_failure;
  2196. if ((sinfo->filled & STATION_INFO_CONNECTED_TIME) &&
  2197. nla_put_u32(msg, NL80211_STA_INFO_CONNECTED_TIME,
  2198. sinfo->connected_time))
  2199. goto nla_put_failure;
  2200. if ((sinfo->filled & STATION_INFO_INACTIVE_TIME) &&
  2201. nla_put_u32(msg, NL80211_STA_INFO_INACTIVE_TIME,
  2202. sinfo->inactive_time))
  2203. goto nla_put_failure;
  2204. if ((sinfo->filled & STATION_INFO_RX_BYTES) &&
  2205. nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
  2206. sinfo->rx_bytes))
  2207. goto nla_put_failure;
  2208. if ((sinfo->filled & STATION_INFO_TX_BYTES) &&
  2209. nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
  2210. sinfo->tx_bytes))
  2211. goto nla_put_failure;
  2212. if ((sinfo->filled & STATION_INFO_LLID) &&
  2213. nla_put_u16(msg, NL80211_STA_INFO_LLID, sinfo->llid))
  2214. goto nla_put_failure;
  2215. if ((sinfo->filled & STATION_INFO_PLID) &&
  2216. nla_put_u16(msg, NL80211_STA_INFO_PLID, sinfo->plid))
  2217. goto nla_put_failure;
  2218. if ((sinfo->filled & STATION_INFO_PLINK_STATE) &&
  2219. nla_put_u8(msg, NL80211_STA_INFO_PLINK_STATE,
  2220. sinfo->plink_state))
  2221. goto nla_put_failure;
  2222. switch (rdev->wiphy.signal_type) {
  2223. case CFG80211_SIGNAL_TYPE_MBM:
  2224. if ((sinfo->filled & STATION_INFO_SIGNAL) &&
  2225. nla_put_u8(msg, NL80211_STA_INFO_SIGNAL,
  2226. sinfo->signal))
  2227. goto nla_put_failure;
  2228. if ((sinfo->filled & STATION_INFO_SIGNAL_AVG) &&
  2229. nla_put_u8(msg, NL80211_STA_INFO_SIGNAL_AVG,
  2230. sinfo->signal_avg))
  2231. goto nla_put_failure;
  2232. break;
  2233. default:
  2234. break;
  2235. }
  2236. if (sinfo->filled & STATION_INFO_TX_BITRATE) {
  2237. if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
  2238. NL80211_STA_INFO_TX_BITRATE))
  2239. goto nla_put_failure;
  2240. }
  2241. if (sinfo->filled & STATION_INFO_RX_BITRATE) {
  2242. if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
  2243. NL80211_STA_INFO_RX_BITRATE))
  2244. goto nla_put_failure;
  2245. }
  2246. if ((sinfo->filled & STATION_INFO_RX_PACKETS) &&
  2247. nla_put_u32(msg, NL80211_STA_INFO_RX_PACKETS,
  2248. sinfo->rx_packets))
  2249. goto nla_put_failure;
  2250. if ((sinfo->filled & STATION_INFO_TX_PACKETS) &&
  2251. nla_put_u32(msg, NL80211_STA_INFO_TX_PACKETS,
  2252. sinfo->tx_packets))
  2253. goto nla_put_failure;
  2254. if ((sinfo->filled & STATION_INFO_TX_RETRIES) &&
  2255. nla_put_u32(msg, NL80211_STA_INFO_TX_RETRIES,
  2256. sinfo->tx_retries))
  2257. goto nla_put_failure;
  2258. if ((sinfo->filled & STATION_INFO_TX_FAILED) &&
  2259. nla_put_u32(msg, NL80211_STA_INFO_TX_FAILED,
  2260. sinfo->tx_failed))
  2261. goto nla_put_failure;
  2262. if ((sinfo->filled & STATION_INFO_BEACON_LOSS_COUNT) &&
  2263. nla_put_u32(msg, NL80211_STA_INFO_BEACON_LOSS,
  2264. sinfo->beacon_loss_count))
  2265. goto nla_put_failure;
  2266. if (sinfo->filled & STATION_INFO_BSS_PARAM) {
  2267. bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM);
  2268. if (!bss_param)
  2269. goto nla_put_failure;
  2270. if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
  2271. nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
  2272. ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
  2273. nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
  2274. ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
  2275. nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
  2276. nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
  2277. sinfo->bss_param.dtim_period) ||
  2278. nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
  2279. sinfo->bss_param.beacon_interval))
  2280. goto nla_put_failure;
  2281. nla_nest_end(msg, bss_param);
  2282. }
  2283. if ((sinfo->filled & STATION_INFO_STA_FLAGS) &&
  2284. nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
  2285. sizeof(struct nl80211_sta_flag_update),
  2286. &sinfo->sta_flags))
  2287. goto nla_put_failure;
  2288. if ((sinfo->filled & STATION_INFO_T_OFFSET) &&
  2289. nla_put_u64(msg, NL80211_STA_INFO_T_OFFSET,
  2290. sinfo->t_offset))
  2291. goto nla_put_failure;
  2292. nla_nest_end(msg, sinfoattr);
  2293. if ((sinfo->filled & STATION_INFO_ASSOC_REQ_IES) &&
  2294. nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
  2295. sinfo->assoc_req_ies))
  2296. goto nla_put_failure;
  2297. return genlmsg_end(msg, hdr);
  2298. nla_put_failure:
  2299. genlmsg_cancel(msg, hdr);
  2300. return -EMSGSIZE;
  2301. }
  2302. static int nl80211_dump_station(struct sk_buff *skb,
  2303. struct netlink_callback *cb)
  2304. {
  2305. struct station_info sinfo;
  2306. struct cfg80211_registered_device *dev;
  2307. struct net_device *netdev;
  2308. u8 mac_addr[ETH_ALEN];
  2309. int sta_idx = cb->args[1];
  2310. int err;
  2311. err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
  2312. if (err)
  2313. return err;
  2314. if (!dev->ops->dump_station) {
  2315. err = -EOPNOTSUPP;
  2316. goto out_err;
  2317. }
  2318. while (1) {
  2319. memset(&sinfo, 0, sizeof(sinfo));
  2320. err = dev->ops->dump_station(&dev->wiphy, netdev, sta_idx,
  2321. mac_addr, &sinfo);
  2322. if (err == -ENOENT)
  2323. break;
  2324. if (err)
  2325. goto out_err;
  2326. if (nl80211_send_station(skb,
  2327. NETLINK_CB(cb->skb).pid,
  2328. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  2329. dev, netdev, mac_addr,
  2330. &sinfo) < 0)
  2331. goto out;
  2332. sta_idx++;
  2333. }
  2334. out:
  2335. cb->args[1] = sta_idx;
  2336. err = skb->len;
  2337. out_err:
  2338. nl80211_finish_netdev_dump(dev);
  2339. return err;
  2340. }
  2341. static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
  2342. {
  2343. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2344. struct net_device *dev = info->user_ptr[1];
  2345. struct station_info sinfo;
  2346. struct sk_buff *msg;
  2347. u8 *mac_addr = NULL;
  2348. int err;
  2349. memset(&sinfo, 0, sizeof(sinfo));
  2350. if (!info->attrs[NL80211_ATTR_MAC])
  2351. return -EINVAL;
  2352. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2353. if (!rdev->ops->get_station)
  2354. return -EOPNOTSUPP;
  2355. err = rdev->ops->get_station(&rdev->wiphy, dev, mac_addr, &sinfo);
  2356. if (err)
  2357. return err;
  2358. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  2359. if (!msg)
  2360. return -ENOMEM;
  2361. if (nl80211_send_station(msg, info->snd_pid, info->snd_seq, 0,
  2362. rdev, dev, mac_addr, &sinfo) < 0) {
  2363. nlmsg_free(msg);
  2364. return -ENOBUFS;
  2365. }
  2366. return genlmsg_reply(msg, info);
  2367. }
  2368. /*
  2369. * Get vlan interface making sure it is running and on the right wiphy.
  2370. */
  2371. static struct net_device *get_vlan(struct genl_info *info,
  2372. struct cfg80211_registered_device *rdev)
  2373. {
  2374. struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
  2375. struct net_device *v;
  2376. int ret;
  2377. if (!vlanattr)
  2378. return NULL;
  2379. v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
  2380. if (!v)
  2381. return ERR_PTR(-ENODEV);
  2382. if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
  2383. ret = -EINVAL;
  2384. goto error;
  2385. }
  2386. if (!netif_running(v)) {
  2387. ret = -ENETDOWN;
  2388. goto error;
  2389. }
  2390. return v;
  2391. error:
  2392. dev_put(v);
  2393. return ERR_PTR(ret);
  2394. }
  2395. static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
  2396. {
  2397. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2398. int err;
  2399. struct net_device *dev = info->user_ptr[1];
  2400. struct station_parameters params;
  2401. u8 *mac_addr = NULL;
  2402. memset(&params, 0, sizeof(params));
  2403. params.listen_interval = -1;
  2404. params.plink_state = -1;
  2405. if (info->attrs[NL80211_ATTR_STA_AID])
  2406. return -EINVAL;
  2407. if (!info->attrs[NL80211_ATTR_MAC])
  2408. return -EINVAL;
  2409. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2410. if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
  2411. params.supported_rates =
  2412. nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
  2413. params.supported_rates_len =
  2414. nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
  2415. }
  2416. if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
  2417. params.listen_interval =
  2418. nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
  2419. if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
  2420. params.ht_capa =
  2421. nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
  2422. if (!rdev->ops->change_station)
  2423. return -EOPNOTSUPP;
  2424. if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
  2425. return -EINVAL;
  2426. if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
  2427. params.plink_action =
  2428. nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
  2429. if (info->attrs[NL80211_ATTR_STA_PLINK_STATE])
  2430. params.plink_state =
  2431. nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
  2432. switch (dev->ieee80211_ptr->iftype) {
  2433. case NL80211_IFTYPE_AP:
  2434. case NL80211_IFTYPE_AP_VLAN:
  2435. case NL80211_IFTYPE_P2P_GO:
  2436. /* disallow mesh-specific things */
  2437. if (params.plink_action)
  2438. return -EINVAL;
  2439. /* TDLS can't be set, ... */
  2440. if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
  2441. return -EINVAL;
  2442. /*
  2443. * ... but don't bother the driver with it. This works around
  2444. * a hostapd/wpa_supplicant issue -- it always includes the
  2445. * TLDS_PEER flag in the mask even for AP mode.
  2446. */
  2447. params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
  2448. /* accept only the listed bits */
  2449. if (params.sta_flags_mask &
  2450. ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
  2451. BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
  2452. BIT(NL80211_STA_FLAG_WME) |
  2453. BIT(NL80211_STA_FLAG_MFP)))
  2454. return -EINVAL;
  2455. /* must be last in here for error handling */
  2456. params.vlan = get_vlan(info, rdev);
  2457. if (IS_ERR(params.vlan))
  2458. return PTR_ERR(params.vlan);
  2459. break;
  2460. case NL80211_IFTYPE_P2P_CLIENT:
  2461. case NL80211_IFTYPE_STATION:
  2462. /*
  2463. * Don't allow userspace to change the TDLS_PEER flag,
  2464. * but silently ignore attempts to change it since we
  2465. * don't have state here to verify that it doesn't try
  2466. * to change the flag.
  2467. */
  2468. params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
  2469. /* fall through */
  2470. case NL80211_IFTYPE_ADHOC:
  2471. /* disallow things sta doesn't support */
  2472. if (params.plink_action)
  2473. return -EINVAL;
  2474. if (params.ht_capa)
  2475. return -EINVAL;
  2476. if (params.listen_interval >= 0)
  2477. return -EINVAL;
  2478. /* reject any changes other than AUTHORIZED */
  2479. if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
  2480. return -EINVAL;
  2481. break;
  2482. case NL80211_IFTYPE_MESH_POINT:
  2483. /* disallow things mesh doesn't support */
  2484. if (params.vlan)
  2485. return -EINVAL;
  2486. if (params.ht_capa)
  2487. return -EINVAL;
  2488. if (params.listen_interval >= 0)
  2489. return -EINVAL;
  2490. /*
  2491. * No special handling for TDLS here -- the userspace
  2492. * mesh code doesn't have this bug.
  2493. */
  2494. if (params.sta_flags_mask &
  2495. ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
  2496. BIT(NL80211_STA_FLAG_MFP) |
  2497. BIT(NL80211_STA_FLAG_AUTHORIZED)))
  2498. return -EINVAL;
  2499. break;
  2500. default:
  2501. return -EOPNOTSUPP;
  2502. }
  2503. /* be aware of params.vlan when changing code here */
  2504. err = rdev->ops->change_station(&rdev->wiphy, dev, mac_addr, &params);
  2505. if (params.vlan)
  2506. dev_put(params.vlan);
  2507. return err;
  2508. }
  2509. static struct nla_policy
  2510. nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] __read_mostly = {
  2511. [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
  2512. [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
  2513. };
  2514. static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
  2515. {
  2516. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2517. int err;
  2518. struct net_device *dev = info->user_ptr[1];
  2519. struct station_parameters params;
  2520. u8 *mac_addr = NULL;
  2521. memset(&params, 0, sizeof(params));
  2522. if (!info->attrs[NL80211_ATTR_MAC])
  2523. return -EINVAL;
  2524. if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
  2525. return -EINVAL;
  2526. if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
  2527. return -EINVAL;
  2528. if (!info->attrs[NL80211_ATTR_STA_AID])
  2529. return -EINVAL;
  2530. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2531. params.supported_rates =
  2532. nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
  2533. params.supported_rates_len =
  2534. nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
  2535. params.listen_interval =
  2536. nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
  2537. params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);
  2538. if (!params.aid || params.aid > IEEE80211_MAX_AID)
  2539. return -EINVAL;
  2540. if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
  2541. params.ht_capa =
  2542. nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
  2543. if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
  2544. params.plink_action =
  2545. nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);
  2546. if (!rdev->ops->add_station)
  2547. return -EOPNOTSUPP;
  2548. if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
  2549. return -EINVAL;
  2550. switch (dev->ieee80211_ptr->iftype) {
  2551. case NL80211_IFTYPE_AP:
  2552. case NL80211_IFTYPE_AP_VLAN:
  2553. case NL80211_IFTYPE_P2P_GO:
  2554. /* parse WME attributes if sta is WME capable */
  2555. if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
  2556. (params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)) &&
  2557. info->attrs[NL80211_ATTR_STA_WME]) {
  2558. struct nlattr *tb[NL80211_STA_WME_MAX + 1];
  2559. struct nlattr *nla;
  2560. nla = info->attrs[NL80211_ATTR_STA_WME];
  2561. err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla,
  2562. nl80211_sta_wme_policy);
  2563. if (err)
  2564. return err;
  2565. if (tb[NL80211_STA_WME_UAPSD_QUEUES])
  2566. params.uapsd_queues =
  2567. nla_get_u8(tb[NL80211_STA_WME_UAPSD_QUEUES]);
  2568. if (params.uapsd_queues &
  2569. ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
  2570. return -EINVAL;
  2571. if (tb[NL80211_STA_WME_MAX_SP])
  2572. params.max_sp =
  2573. nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);
  2574. if (params.max_sp &
  2575. ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
  2576. return -EINVAL;
  2577. params.sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;
  2578. }
  2579. /* TDLS peers cannot be added */
  2580. if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
  2581. return -EINVAL;
  2582. /* but don't bother the driver with it */
  2583. params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
  2584. /* must be last in here for error handling */
  2585. params.vlan = get_vlan(info, rdev);
  2586. if (IS_ERR(params.vlan))
  2587. return PTR_ERR(params.vlan);
  2588. break;
  2589. case NL80211_IFTYPE_MESH_POINT:
  2590. /* TDLS peers cannot be added */
  2591. if (params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
  2592. return -EINVAL;
  2593. break;
  2594. case NL80211_IFTYPE_STATION:
  2595. /* Only TDLS peers can be added */
  2596. if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
  2597. return -EINVAL;
  2598. /* Can only add if TDLS ... */
  2599. if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
  2600. return -EOPNOTSUPP;
  2601. /* ... with external setup is supported */
  2602. if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
  2603. return -EOPNOTSUPP;
  2604. break;
  2605. default:
  2606. return -EOPNOTSUPP;
  2607. }
  2608. /* be aware of params.vlan when changing code here */
  2609. err = rdev->ops->add_station(&rdev->wiphy, dev, mac_addr, &params);
  2610. if (params.vlan)
  2611. dev_put(params.vlan);
  2612. return err;
  2613. }
  2614. static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
  2615. {
  2616. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2617. struct net_device *dev = info->user_ptr[1];
  2618. u8 *mac_addr = NULL;
  2619. if (info->attrs[NL80211_ATTR_MAC])
  2620. mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2621. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  2622. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
  2623. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
  2624. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  2625. return -EINVAL;
  2626. if (!rdev->ops->del_station)
  2627. return -EOPNOTSUPP;
  2628. return rdev->ops->del_station(&rdev->wiphy, dev, mac_addr);
  2629. }
  2630. static int nl80211_send_mpath(struct sk_buff *msg, u32 pid, u32 seq,
  2631. int flags, struct net_device *dev,
  2632. u8 *dst, u8 *next_hop,
  2633. struct mpath_info *pinfo)
  2634. {
  2635. void *hdr;
  2636. struct nlattr *pinfoattr;
  2637. hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_STATION);
  2638. if (!hdr)
  2639. return -1;
  2640. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  2641. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
  2642. nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
  2643. nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
  2644. goto nla_put_failure;
  2645. pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO);
  2646. if (!pinfoattr)
  2647. goto nla_put_failure;
  2648. if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
  2649. nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
  2650. pinfo->frame_qlen))
  2651. goto nla_put_failure;
  2652. if (((pinfo->filled & MPATH_INFO_SN) &&
  2653. nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
  2654. ((pinfo->filled & MPATH_INFO_METRIC) &&
  2655. nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
  2656. pinfo->metric)) ||
  2657. ((pinfo->filled & MPATH_INFO_EXPTIME) &&
  2658. nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
  2659. pinfo->exptime)) ||
  2660. ((pinfo->filled & MPATH_INFO_FLAGS) &&
  2661. nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
  2662. pinfo->flags)) ||
  2663. ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
  2664. nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
  2665. pinfo->discovery_timeout)) ||
  2666. ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
  2667. nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
  2668. pinfo->discovery_retries)))
  2669. goto nla_put_failure;
  2670. nla_nest_end(msg, pinfoattr);
  2671. return genlmsg_end(msg, hdr);
  2672. nla_put_failure:
  2673. genlmsg_cancel(msg, hdr);
  2674. return -EMSGSIZE;
  2675. }
  2676. static int nl80211_dump_mpath(struct sk_buff *skb,
  2677. struct netlink_callback *cb)
  2678. {
  2679. struct mpath_info pinfo;
  2680. struct cfg80211_registered_device *dev;
  2681. struct net_device *netdev;
  2682. u8 dst[ETH_ALEN];
  2683. u8 next_hop[ETH_ALEN];
  2684. int path_idx = cb->args[1];
  2685. int err;
  2686. err = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
  2687. if (err)
  2688. return err;
  2689. if (!dev->ops->dump_mpath) {
  2690. err = -EOPNOTSUPP;
  2691. goto out_err;
  2692. }
  2693. if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) {
  2694. err = -EOPNOTSUPP;
  2695. goto out_err;
  2696. }
  2697. while (1) {
  2698. err = dev->ops->dump_mpath(&dev->wiphy, netdev, path_idx,
  2699. dst, next_hop, &pinfo);
  2700. if (err == -ENOENT)
  2701. break;
  2702. if (err)
  2703. goto out_err;
  2704. if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).pid,
  2705. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  2706. netdev, dst, next_hop,
  2707. &pinfo) < 0)
  2708. goto out;
  2709. path_idx++;
  2710. }
  2711. out:
  2712. cb->args[1] = path_idx;
  2713. err = skb->len;
  2714. out_err:
  2715. nl80211_finish_netdev_dump(dev);
  2716. return err;
  2717. }
  2718. static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
  2719. {
  2720. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2721. int err;
  2722. struct net_device *dev = info->user_ptr[1];
  2723. struct mpath_info pinfo;
  2724. struct sk_buff *msg;
  2725. u8 *dst = NULL;
  2726. u8 next_hop[ETH_ALEN];
  2727. memset(&pinfo, 0, sizeof(pinfo));
  2728. if (!info->attrs[NL80211_ATTR_MAC])
  2729. return -EINVAL;
  2730. dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2731. if (!rdev->ops->get_mpath)
  2732. return -EOPNOTSUPP;
  2733. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
  2734. return -EOPNOTSUPP;
  2735. err = rdev->ops->get_mpath(&rdev->wiphy, dev, dst, next_hop, &pinfo);
  2736. if (err)
  2737. return err;
  2738. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  2739. if (!msg)
  2740. return -ENOMEM;
  2741. if (nl80211_send_mpath(msg, info->snd_pid, info->snd_seq, 0,
  2742. dev, dst, next_hop, &pinfo) < 0) {
  2743. nlmsg_free(msg);
  2744. return -ENOBUFS;
  2745. }
  2746. return genlmsg_reply(msg, info);
  2747. }
  2748. static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
  2749. {
  2750. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2751. struct net_device *dev = info->user_ptr[1];
  2752. u8 *dst = NULL;
  2753. u8 *next_hop = NULL;
  2754. if (!info->attrs[NL80211_ATTR_MAC])
  2755. return -EINVAL;
  2756. if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
  2757. return -EINVAL;
  2758. dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2759. next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
  2760. if (!rdev->ops->change_mpath)
  2761. return -EOPNOTSUPP;
  2762. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
  2763. return -EOPNOTSUPP;
  2764. return rdev->ops->change_mpath(&rdev->wiphy, dev, dst, next_hop);
  2765. }
  2766. static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
  2767. {
  2768. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2769. struct net_device *dev = info->user_ptr[1];
  2770. u8 *dst = NULL;
  2771. u8 *next_hop = NULL;
  2772. if (!info->attrs[NL80211_ATTR_MAC])
  2773. return -EINVAL;
  2774. if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
  2775. return -EINVAL;
  2776. dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2777. next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);
  2778. if (!rdev->ops->add_mpath)
  2779. return -EOPNOTSUPP;
  2780. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
  2781. return -EOPNOTSUPP;
  2782. return rdev->ops->add_mpath(&rdev->wiphy, dev, dst, next_hop);
  2783. }
  2784. static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
  2785. {
  2786. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2787. struct net_device *dev = info->user_ptr[1];
  2788. u8 *dst = NULL;
  2789. if (info->attrs[NL80211_ATTR_MAC])
  2790. dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
  2791. if (!rdev->ops->del_mpath)
  2792. return -EOPNOTSUPP;
  2793. return rdev->ops->del_mpath(&rdev->wiphy, dev, dst);
  2794. }
  2795. static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
  2796. {
  2797. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2798. struct net_device *dev = info->user_ptr[1];
  2799. struct bss_parameters params;
  2800. memset(&params, 0, sizeof(params));
  2801. /* default to not changing parameters */
  2802. params.use_cts_prot = -1;
  2803. params.use_short_preamble = -1;
  2804. params.use_short_slot_time = -1;
  2805. params.ap_isolate = -1;
  2806. params.ht_opmode = -1;
  2807. if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
  2808. params.use_cts_prot =
  2809. nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
  2810. if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
  2811. params.use_short_preamble =
  2812. nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
  2813. if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
  2814. params.use_short_slot_time =
  2815. nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
  2816. if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
  2817. params.basic_rates =
  2818. nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
  2819. params.basic_rates_len =
  2820. nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
  2821. }
  2822. if (info->attrs[NL80211_ATTR_AP_ISOLATE])
  2823. params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
  2824. if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
  2825. params.ht_opmode =
  2826. nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);
  2827. if (!rdev->ops->change_bss)
  2828. return -EOPNOTSUPP;
  2829. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  2830. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  2831. return -EOPNOTSUPP;
  2832. return rdev->ops->change_bss(&rdev->wiphy, dev, &params);
  2833. }
  2834. static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
  2835. [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 },
  2836. [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 },
  2837. [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 },
  2838. [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 },
  2839. [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
  2840. [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
  2841. };
  2842. static int parse_reg_rule(struct nlattr *tb[],
  2843. struct ieee80211_reg_rule *reg_rule)
  2844. {
  2845. struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
  2846. struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;
  2847. if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
  2848. return -EINVAL;
  2849. if (!tb[NL80211_ATTR_FREQ_RANGE_START])
  2850. return -EINVAL;
  2851. if (!tb[NL80211_ATTR_FREQ_RANGE_END])
  2852. return -EINVAL;
  2853. if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
  2854. return -EINVAL;
  2855. if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
  2856. return -EINVAL;
  2857. reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
  2858. freq_range->start_freq_khz =
  2859. nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
  2860. freq_range->end_freq_khz =
  2861. nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
  2862. freq_range->max_bandwidth_khz =
  2863. nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);
  2864. power_rule->max_eirp =
  2865. nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);
  2866. if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
  2867. power_rule->max_antenna_gain =
  2868. nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);
  2869. return 0;
  2870. }
  2871. static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
  2872. {
  2873. int r;
  2874. char *data = NULL;
  2875. /*
  2876. * You should only get this when cfg80211 hasn't yet initialized
  2877. * completely when built-in to the kernel right between the time
  2878. * window between nl80211_init() and regulatory_init(), if that is
  2879. * even possible.
  2880. */
  2881. mutex_lock(&cfg80211_mutex);
  2882. if (unlikely(!cfg80211_regdomain)) {
  2883. mutex_unlock(&cfg80211_mutex);
  2884. return -EINPROGRESS;
  2885. }
  2886. mutex_unlock(&cfg80211_mutex);
  2887. if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
  2888. return -EINVAL;
  2889. data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
  2890. r = regulatory_hint_user(data);
  2891. return r;
  2892. }
  2893. static int nl80211_get_mesh_config(struct sk_buff *skb,
  2894. struct genl_info *info)
  2895. {
  2896. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  2897. struct net_device *dev = info->user_ptr[1];
  2898. struct wireless_dev *wdev = dev->ieee80211_ptr;
  2899. struct mesh_config cur_params;
  2900. int err = 0;
  2901. void *hdr;
  2902. struct nlattr *pinfoattr;
  2903. struct sk_buff *msg;
  2904. if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
  2905. return -EOPNOTSUPP;
  2906. if (!rdev->ops->get_mesh_config)
  2907. return -EOPNOTSUPP;
  2908. wdev_lock(wdev);
  2909. /* If not connected, get default parameters */
  2910. if (!wdev->mesh_id_len)
  2911. memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
  2912. else
  2913. err = rdev->ops->get_mesh_config(&rdev->wiphy, dev,
  2914. &cur_params);
  2915. wdev_unlock(wdev);
  2916. if (err)
  2917. return err;
  2918. /* Draw up a netlink message to send back */
  2919. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  2920. if (!msg)
  2921. return -ENOMEM;
  2922. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  2923. NL80211_CMD_GET_MESH_CONFIG);
  2924. if (!hdr)
  2925. goto out;
  2926. pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
  2927. if (!pinfoattr)
  2928. goto nla_put_failure;
  2929. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  2930. nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
  2931. cur_params.dot11MeshRetryTimeout) ||
  2932. nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
  2933. cur_params.dot11MeshConfirmTimeout) ||
  2934. nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
  2935. cur_params.dot11MeshHoldingTimeout) ||
  2936. nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
  2937. cur_params.dot11MeshMaxPeerLinks) ||
  2938. nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
  2939. cur_params.dot11MeshMaxRetries) ||
  2940. nla_put_u8(msg, NL80211_MESHCONF_TTL,
  2941. cur_params.dot11MeshTTL) ||
  2942. nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
  2943. cur_params.element_ttl) ||
  2944. nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
  2945. cur_params.auto_open_plinks) ||
  2946. nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
  2947. cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
  2948. nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
  2949. cur_params.dot11MeshHWMPmaxPREQretries) ||
  2950. nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
  2951. cur_params.path_refresh_time) ||
  2952. nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
  2953. cur_params.min_discovery_timeout) ||
  2954. nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
  2955. cur_params.dot11MeshHWMPactivePathTimeout) ||
  2956. nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
  2957. cur_params.dot11MeshHWMPpreqMinInterval) ||
  2958. nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
  2959. cur_params.dot11MeshHWMPperrMinInterval) ||
  2960. nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
  2961. cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
  2962. nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
  2963. cur_params.dot11MeshHWMPRootMode) ||
  2964. nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
  2965. cur_params.dot11MeshHWMPRannInterval) ||
  2966. nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
  2967. cur_params.dot11MeshGateAnnouncementProtocol) ||
  2968. nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
  2969. cur_params.dot11MeshForwarding) ||
  2970. nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
  2971. cur_params.rssi_threshold) ||
  2972. nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
  2973. cur_params.ht_opmode) ||
  2974. nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
  2975. cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
  2976. nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
  2977. cur_params.dot11MeshHWMProotInterval) ||
  2978. nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
  2979. cur_params.dot11MeshHWMPconfirmationInterval))
  2980. goto nla_put_failure;
  2981. nla_nest_end(msg, pinfoattr);
  2982. genlmsg_end(msg, hdr);
  2983. return genlmsg_reply(msg, info);
  2984. nla_put_failure:
  2985. genlmsg_cancel(msg, hdr);
  2986. out:
  2987. nlmsg_free(msg);
  2988. return -ENOBUFS;
  2989. }
  2990. static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
  2991. [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 },
  2992. [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 },
  2993. [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 },
  2994. [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 },
  2995. [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 },
  2996. [NL80211_MESHCONF_TTL] = { .type = NLA_U8 },
  2997. [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 },
  2998. [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 },
  2999. [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 },
  3000. [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
  3001. [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
  3002. [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 },
  3003. [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
  3004. [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 },
  3005. [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 },
  3006. [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 },
  3007. [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 },
  3008. [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 },
  3009. [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 },
  3010. [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 },
  3011. [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 },
  3012. [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
  3013. [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
  3014. [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 },
  3015. [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 },
  3016. };
  3017. static const struct nla_policy
  3018. nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
  3019. [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
  3020. [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
  3021. [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
  3022. [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
  3023. [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY,
  3024. .len = IEEE80211_MAX_DATA_LEN },
  3025. [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
  3026. };
  3027. static int nl80211_parse_mesh_config(struct genl_info *info,
  3028. struct mesh_config *cfg,
  3029. u32 *mask_out)
  3030. {
  3031. struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
  3032. u32 mask = 0;
  3033. #define FILL_IN_MESH_PARAM_IF_SET(table, cfg, param, mask, attr_num, nla_fn) \
  3034. do {\
  3035. if (table[attr_num]) {\
  3036. cfg->param = nla_fn(table[attr_num]); \
  3037. mask |= (1 << (attr_num - 1)); \
  3038. } \
  3039. } while (0);\
  3040. if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
  3041. return -EINVAL;
  3042. if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX,
  3043. info->attrs[NL80211_ATTR_MESH_CONFIG],
  3044. nl80211_meshconf_params_policy))
  3045. return -EINVAL;
  3046. /* This makes sure that there aren't more than 32 mesh config
  3047. * parameters (otherwise our bitfield scheme would not work.) */
  3048. BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);
  3049. /* Fill in the params struct */
  3050. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout,
  3051. mask, NL80211_MESHCONF_RETRY_TIMEOUT,
  3052. nla_get_u16);
  3053. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout,
  3054. mask, NL80211_MESHCONF_CONFIRM_TIMEOUT,
  3055. nla_get_u16);
  3056. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout,
  3057. mask, NL80211_MESHCONF_HOLDING_TIMEOUT,
  3058. nla_get_u16);
  3059. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks,
  3060. mask, NL80211_MESHCONF_MAX_PEER_LINKS,
  3061. nla_get_u16);
  3062. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries,
  3063. mask, NL80211_MESHCONF_MAX_RETRIES,
  3064. nla_get_u8);
  3065. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL,
  3066. mask, NL80211_MESHCONF_TTL, nla_get_u8);
  3067. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl,
  3068. mask, NL80211_MESHCONF_ELEMENT_TTL,
  3069. nla_get_u8);
  3070. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks,
  3071. mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
  3072. nla_get_u8);
  3073. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, mask,
  3074. NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
  3075. nla_get_u32);
  3076. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries,
  3077. mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
  3078. nla_get_u8);
  3079. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time,
  3080. mask, NL80211_MESHCONF_PATH_REFRESH_TIME,
  3081. nla_get_u32);
  3082. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout,
  3083. mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
  3084. nla_get_u16);
  3085. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, mask,
  3086. NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
  3087. nla_get_u32);
  3088. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval,
  3089. mask, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
  3090. nla_get_u16);
  3091. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval,
  3092. mask, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
  3093. nla_get_u16);
  3094. FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
  3095. dot11MeshHWMPnetDiameterTraversalTime, mask,
  3096. NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
  3097. nla_get_u16);
  3098. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
  3099. NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
  3100. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
  3101. NL80211_MESHCONF_HWMP_RANN_INTERVAL,
  3102. nla_get_u16);
  3103. FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
  3104. dot11MeshGateAnnouncementProtocol, mask,
  3105. NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
  3106. nla_get_u8);
  3107. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding,
  3108. mask, NL80211_MESHCONF_FORWARDING,
  3109. nla_get_u8);
  3110. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold,
  3111. mask, NL80211_MESHCONF_RSSI_THRESHOLD,
  3112. nla_get_u32);
  3113. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, ht_opmode,
  3114. mask, NL80211_MESHCONF_HT_OPMODE,
  3115. nla_get_u16);
  3116. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout,
  3117. mask,
  3118. NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
  3119. nla_get_u32);
  3120. FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval,
  3121. mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
  3122. nla_get_u16);
  3123. FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
  3124. dot11MeshHWMPconfirmationInterval, mask,
  3125. NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
  3126. nla_get_u16);
  3127. if (mask_out)
  3128. *mask_out = mask;
  3129. return 0;
  3130. #undef FILL_IN_MESH_PARAM_IF_SET
  3131. }
  3132. static int nl80211_parse_mesh_setup(struct genl_info *info,
  3133. struct mesh_setup *setup)
  3134. {
  3135. struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];
  3136. if (!info->attrs[NL80211_ATTR_MESH_SETUP])
  3137. return -EINVAL;
  3138. if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX,
  3139. info->attrs[NL80211_ATTR_MESH_SETUP],
  3140. nl80211_mesh_setup_params_policy))
  3141. return -EINVAL;
  3142. if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
  3143. setup->sync_method =
  3144. (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
  3145. IEEE80211_SYNC_METHOD_VENDOR :
  3146. IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;
  3147. if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
  3148. setup->path_sel_proto =
  3149. (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
  3150. IEEE80211_PATH_PROTOCOL_VENDOR :
  3151. IEEE80211_PATH_PROTOCOL_HWMP;
  3152. if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
  3153. setup->path_metric =
  3154. (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
  3155. IEEE80211_PATH_METRIC_VENDOR :
  3156. IEEE80211_PATH_METRIC_AIRTIME;
  3157. if (tb[NL80211_MESH_SETUP_IE]) {
  3158. struct nlattr *ieattr =
  3159. tb[NL80211_MESH_SETUP_IE];
  3160. if (!is_valid_ie_attr(ieattr))
  3161. return -EINVAL;
  3162. setup->ie = nla_data(ieattr);
  3163. setup->ie_len = nla_len(ieattr);
  3164. }
  3165. setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
  3166. setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
  3167. return 0;
  3168. }
  3169. static int nl80211_update_mesh_config(struct sk_buff *skb,
  3170. struct genl_info *info)
  3171. {
  3172. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  3173. struct net_device *dev = info->user_ptr[1];
  3174. struct wireless_dev *wdev = dev->ieee80211_ptr;
  3175. struct mesh_config cfg;
  3176. u32 mask;
  3177. int err;
  3178. if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
  3179. return -EOPNOTSUPP;
  3180. if (!rdev->ops->update_mesh_config)
  3181. return -EOPNOTSUPP;
  3182. err = nl80211_parse_mesh_config(info, &cfg, &mask);
  3183. if (err)
  3184. return err;
  3185. wdev_lock(wdev);
  3186. if (!wdev->mesh_id_len)
  3187. err = -ENOLINK;
  3188. if (!err)
  3189. err = rdev->ops->update_mesh_config(&rdev->wiphy, dev,
  3190. mask, &cfg);
  3191. wdev_unlock(wdev);
  3192. return err;
  3193. }
  3194. static int nl80211_get_reg(struct sk_buff *skb, struct genl_info *info)
  3195. {
  3196. struct sk_buff *msg;
  3197. void *hdr = NULL;
  3198. struct nlattr *nl_reg_rules;
  3199. unsigned int i;
  3200. int err = -EINVAL;
  3201. mutex_lock(&cfg80211_mutex);
  3202. if (!cfg80211_regdomain)
  3203. goto out;
  3204. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  3205. if (!msg) {
  3206. err = -ENOBUFS;
  3207. goto out;
  3208. }
  3209. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  3210. NL80211_CMD_GET_REG);
  3211. if (!hdr)
  3212. goto put_failure;
  3213. if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
  3214. cfg80211_regdomain->alpha2) ||
  3215. (cfg80211_regdomain->dfs_region &&
  3216. nla_put_u8(msg, NL80211_ATTR_DFS_REGION,
  3217. cfg80211_regdomain->dfs_region)))
  3218. goto nla_put_failure;
  3219. nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES);
  3220. if (!nl_reg_rules)
  3221. goto nla_put_failure;
  3222. for (i = 0; i < cfg80211_regdomain->n_reg_rules; i++) {
  3223. struct nlattr *nl_reg_rule;
  3224. const struct ieee80211_reg_rule *reg_rule;
  3225. const struct ieee80211_freq_range *freq_range;
  3226. const struct ieee80211_power_rule *power_rule;
  3227. reg_rule = &cfg80211_regdomain->reg_rules[i];
  3228. freq_range = &reg_rule->freq_range;
  3229. power_rule = &reg_rule->power_rule;
  3230. nl_reg_rule = nla_nest_start(msg, i);
  3231. if (!nl_reg_rule)
  3232. goto nla_put_failure;
  3233. if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
  3234. reg_rule->flags) ||
  3235. nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
  3236. freq_range->start_freq_khz) ||
  3237. nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
  3238. freq_range->end_freq_khz) ||
  3239. nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
  3240. freq_range->max_bandwidth_khz) ||
  3241. nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
  3242. power_rule->max_antenna_gain) ||
  3243. nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
  3244. power_rule->max_eirp))
  3245. goto nla_put_failure;
  3246. nla_nest_end(msg, nl_reg_rule);
  3247. }
  3248. nla_nest_end(msg, nl_reg_rules);
  3249. genlmsg_end(msg, hdr);
  3250. err = genlmsg_reply(msg, info);
  3251. goto out;
  3252. nla_put_failure:
  3253. genlmsg_cancel(msg, hdr);
  3254. put_failure:
  3255. nlmsg_free(msg);
  3256. err = -EMSGSIZE;
  3257. out:
  3258. mutex_unlock(&cfg80211_mutex);
  3259. return err;
  3260. }
  3261. static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
  3262. {
  3263. struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
  3264. struct nlattr *nl_reg_rule;
  3265. char *alpha2 = NULL;
  3266. int rem_reg_rules = 0, r = 0;
  3267. u32 num_rules = 0, rule_idx = 0, size_of_regd;
  3268. u8 dfs_region = 0;
  3269. struct ieee80211_regdomain *rd = NULL;
  3270. if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
  3271. return -EINVAL;
  3272. if (!info->attrs[NL80211_ATTR_REG_RULES])
  3273. return -EINVAL;
  3274. alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
  3275. if (info->attrs[NL80211_ATTR_DFS_REGION])
  3276. dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);
  3277. nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
  3278. rem_reg_rules) {
  3279. num_rules++;
  3280. if (num_rules > NL80211_MAX_SUPP_REG_RULES)
  3281. return -EINVAL;
  3282. }
  3283. mutex_lock(&cfg80211_mutex);
  3284. if (!reg_is_valid_request(alpha2)) {
  3285. r = -EINVAL;
  3286. goto bad_reg;
  3287. }
  3288. size_of_regd = sizeof(struct ieee80211_regdomain) +
  3289. (num_rules * sizeof(struct ieee80211_reg_rule));
  3290. rd = kzalloc(size_of_regd, GFP_KERNEL);
  3291. if (!rd) {
  3292. r = -ENOMEM;
  3293. goto bad_reg;
  3294. }
  3295. rd->n_reg_rules = num_rules;
  3296. rd->alpha2[0] = alpha2[0];
  3297. rd->alpha2[1] = alpha2[1];
  3298. /*
  3299. * Disable DFS master mode if the DFS region was
  3300. * not supported or known on this kernel.
  3301. */
  3302. if (reg_supported_dfs_region(dfs_region))
  3303. rd->dfs_region = dfs_region;
  3304. nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
  3305. rem_reg_rules) {
  3306. nla_parse(tb, NL80211_REG_RULE_ATTR_MAX,
  3307. nla_data(nl_reg_rule), nla_len(nl_reg_rule),
  3308. reg_rule_policy);
  3309. r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
  3310. if (r)
  3311. goto bad_reg;
  3312. rule_idx++;
  3313. if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
  3314. r = -EINVAL;
  3315. goto bad_reg;
  3316. }
  3317. }
  3318. BUG_ON(rule_idx != num_rules);
  3319. r = set_regdom(rd);
  3320. mutex_unlock(&cfg80211_mutex);
  3321. return r;
  3322. bad_reg:
  3323. mutex_unlock(&cfg80211_mutex);
  3324. kfree(rd);
  3325. return r;
  3326. }
  3327. static int validate_scan_freqs(struct nlattr *freqs)
  3328. {
  3329. struct nlattr *attr1, *attr2;
  3330. int n_channels = 0, tmp1, tmp2;
  3331. nla_for_each_nested(attr1, freqs, tmp1) {
  3332. n_channels++;
  3333. /*
  3334. * Some hardware has a limited channel list for
  3335. * scanning, and it is pretty much nonsensical
  3336. * to scan for a channel twice, so disallow that
  3337. * and don't require drivers to check that the
  3338. * channel list they get isn't longer than what
  3339. * they can scan, as long as they can scan all
  3340. * the channels they registered at once.
  3341. */
  3342. nla_for_each_nested(attr2, freqs, tmp2)
  3343. if (attr1 != attr2 &&
  3344. nla_get_u32(attr1) == nla_get_u32(attr2))
  3345. return 0;
  3346. }
  3347. return n_channels;
  3348. }
  3349. static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
  3350. {
  3351. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  3352. struct net_device *dev = info->user_ptr[1];
  3353. struct cfg80211_scan_request *request;
  3354. struct nlattr *attr;
  3355. struct wiphy *wiphy;
  3356. int err, tmp, n_ssids = 0, n_channels, i;
  3357. size_t ie_len;
  3358. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  3359. return -EINVAL;
  3360. wiphy = &rdev->wiphy;
  3361. if (!rdev->ops->scan)
  3362. return -EOPNOTSUPP;
  3363. if (rdev->scan_req)
  3364. return -EBUSY;
  3365. if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
  3366. n_channels = validate_scan_freqs(
  3367. info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
  3368. if (!n_channels)
  3369. return -EINVAL;
  3370. } else {
  3371. enum ieee80211_band band;
  3372. n_channels = 0;
  3373. for (band = 0; band < IEEE80211_NUM_BANDS; band++)
  3374. if (wiphy->bands[band])
  3375. n_channels += wiphy->bands[band]->n_channels;
  3376. }
  3377. if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
  3378. nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
  3379. n_ssids++;
  3380. if (n_ssids > wiphy->max_scan_ssids)
  3381. return -EINVAL;
  3382. if (info->attrs[NL80211_ATTR_IE])
  3383. ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  3384. else
  3385. ie_len = 0;
  3386. if (ie_len > wiphy->max_scan_ie_len)
  3387. return -EINVAL;
  3388. request = kzalloc(sizeof(*request)
  3389. + sizeof(*request->ssids) * n_ssids
  3390. + sizeof(*request->channels) * n_channels
  3391. + ie_len, GFP_KERNEL);
  3392. if (!request)
  3393. return -ENOMEM;
  3394. if (n_ssids)
  3395. request->ssids = (void *)&request->channels[n_channels];
  3396. request->n_ssids = n_ssids;
  3397. if (ie_len) {
  3398. if (request->ssids)
  3399. request->ie = (void *)(request->ssids + n_ssids);
  3400. else
  3401. request->ie = (void *)(request->channels + n_channels);
  3402. }
  3403. i = 0;
  3404. if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
  3405. /* user specified, bail out if channel not found */
  3406. nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) {
  3407. struct ieee80211_channel *chan;
  3408. chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
  3409. if (!chan) {
  3410. err = -EINVAL;
  3411. goto out_free;
  3412. }
  3413. /* ignore disabled channels */
  3414. if (chan->flags & IEEE80211_CHAN_DISABLED)
  3415. continue;
  3416. request->channels[i] = chan;
  3417. i++;
  3418. }
  3419. } else {
  3420. enum ieee80211_band band;
  3421. /* all channels */
  3422. for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  3423. int j;
  3424. if (!wiphy->bands[band])
  3425. continue;
  3426. for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
  3427. struct ieee80211_channel *chan;
  3428. chan = &wiphy->bands[band]->channels[j];
  3429. if (chan->flags & IEEE80211_CHAN_DISABLED)
  3430. continue;
  3431. request->channels[i] = chan;
  3432. i++;
  3433. }
  3434. }
  3435. }
  3436. if (!i) {
  3437. err = -EINVAL;
  3438. goto out_free;
  3439. }
  3440. request->n_channels = i;
  3441. i = 0;
  3442. if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
  3443. nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
  3444. if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
  3445. err = -EINVAL;
  3446. goto out_free;
  3447. }
  3448. request->ssids[i].ssid_len = nla_len(attr);
  3449. memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
  3450. i++;
  3451. }
  3452. }
  3453. if (info->attrs[NL80211_ATTR_IE]) {
  3454. request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  3455. memcpy((void *)request->ie,
  3456. nla_data(info->attrs[NL80211_ATTR_IE]),
  3457. request->ie_len);
  3458. }
  3459. for (i = 0; i < IEEE80211_NUM_BANDS; i++)
  3460. if (wiphy->bands[i])
  3461. request->rates[i] =
  3462. (1 << wiphy->bands[i]->n_bitrates) - 1;
  3463. if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
  3464. nla_for_each_nested(attr,
  3465. info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
  3466. tmp) {
  3467. enum ieee80211_band band = nla_type(attr);
  3468. if (band < 0 || band >= IEEE80211_NUM_BANDS) {
  3469. err = -EINVAL;
  3470. goto out_free;
  3471. }
  3472. err = ieee80211_get_ratemask(wiphy->bands[band],
  3473. nla_data(attr),
  3474. nla_len(attr),
  3475. &request->rates[band]);
  3476. if (err)
  3477. goto out_free;
  3478. }
  3479. }
  3480. request->no_cck =
  3481. nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
  3482. request->dev = dev;
  3483. request->wiphy = &rdev->wiphy;
  3484. rdev->scan_req = request;
  3485. err = rdev->ops->scan(&rdev->wiphy, dev, request);
  3486. if (!err) {
  3487. nl80211_send_scan_start(rdev, dev);
  3488. dev_hold(dev);
  3489. } else {
  3490. out_free:
  3491. rdev->scan_req = NULL;
  3492. kfree(request);
  3493. }
  3494. return err;
  3495. }
  3496. static int nl80211_start_sched_scan(struct sk_buff *skb,
  3497. struct genl_info *info)
  3498. {
  3499. struct cfg80211_sched_scan_request *request;
  3500. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  3501. struct net_device *dev = info->user_ptr[1];
  3502. struct nlattr *attr;
  3503. struct wiphy *wiphy;
  3504. int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i;
  3505. u32 interval;
  3506. enum ieee80211_band band;
  3507. size_t ie_len;
  3508. struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
  3509. if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
  3510. !rdev->ops->sched_scan_start)
  3511. return -EOPNOTSUPP;
  3512. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  3513. return -EINVAL;
  3514. if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
  3515. return -EINVAL;
  3516. interval = nla_get_u32(info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
  3517. if (interval == 0)
  3518. return -EINVAL;
  3519. wiphy = &rdev->wiphy;
  3520. if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
  3521. n_channels = validate_scan_freqs(
  3522. info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
  3523. if (!n_channels)
  3524. return -EINVAL;
  3525. } else {
  3526. n_channels = 0;
  3527. for (band = 0; band < IEEE80211_NUM_BANDS; band++)
  3528. if (wiphy->bands[band])
  3529. n_channels += wiphy->bands[band]->n_channels;
  3530. }
  3531. if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
  3532. nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
  3533. tmp)
  3534. n_ssids++;
  3535. if (n_ssids > wiphy->max_sched_scan_ssids)
  3536. return -EINVAL;
  3537. if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH])
  3538. nla_for_each_nested(attr,
  3539. info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
  3540. tmp)
  3541. n_match_sets++;
  3542. if (n_match_sets > wiphy->max_match_sets)
  3543. return -EINVAL;
  3544. if (info->attrs[NL80211_ATTR_IE])
  3545. ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  3546. else
  3547. ie_len = 0;
  3548. if (ie_len > wiphy->max_sched_scan_ie_len)
  3549. return -EINVAL;
  3550. mutex_lock(&rdev->sched_scan_mtx);
  3551. if (rdev->sched_scan_req) {
  3552. err = -EINPROGRESS;
  3553. goto out;
  3554. }
  3555. request = kzalloc(sizeof(*request)
  3556. + sizeof(*request->ssids) * n_ssids
  3557. + sizeof(*request->match_sets) * n_match_sets
  3558. + sizeof(*request->channels) * n_channels
  3559. + ie_len, GFP_KERNEL);
  3560. if (!request) {
  3561. err = -ENOMEM;
  3562. goto out;
  3563. }
  3564. if (n_ssids)
  3565. request->ssids = (void *)&request->channels[n_channels];
  3566. request->n_ssids = n_ssids;
  3567. if (ie_len) {
  3568. if (request->ssids)
  3569. request->ie = (void *)(request->ssids + n_ssids);
  3570. else
  3571. request->ie = (void *)(request->channels + n_channels);
  3572. }
  3573. if (n_match_sets) {
  3574. if (request->ie)
  3575. request->match_sets = (void *)(request->ie + ie_len);
  3576. else if (request->ssids)
  3577. request->match_sets =
  3578. (void *)(request->ssids + n_ssids);
  3579. else
  3580. request->match_sets =
  3581. (void *)(request->channels + n_channels);
  3582. }
  3583. request->n_match_sets = n_match_sets;
  3584. i = 0;
  3585. if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
  3586. /* user specified, bail out if channel not found */
  3587. nla_for_each_nested(attr,
  3588. info->attrs[NL80211_ATTR_SCAN_FREQUENCIES],
  3589. tmp) {
  3590. struct ieee80211_channel *chan;
  3591. chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));
  3592. if (!chan) {
  3593. err = -EINVAL;
  3594. goto out_free;
  3595. }
  3596. /* ignore disabled channels */
  3597. if (chan->flags & IEEE80211_CHAN_DISABLED)
  3598. continue;
  3599. request->channels[i] = chan;
  3600. i++;
  3601. }
  3602. } else {
  3603. /* all channels */
  3604. for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  3605. int j;
  3606. if (!wiphy->bands[band])
  3607. continue;
  3608. for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
  3609. struct ieee80211_channel *chan;
  3610. chan = &wiphy->bands[band]->channels[j];
  3611. if (chan->flags & IEEE80211_CHAN_DISABLED)
  3612. continue;
  3613. request->channels[i] = chan;
  3614. i++;
  3615. }
  3616. }
  3617. }
  3618. if (!i) {
  3619. err = -EINVAL;
  3620. goto out_free;
  3621. }
  3622. request->n_channels = i;
  3623. i = 0;
  3624. if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) {
  3625. nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS],
  3626. tmp) {
  3627. if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
  3628. err = -EINVAL;
  3629. goto out_free;
  3630. }
  3631. request->ssids[i].ssid_len = nla_len(attr);
  3632. memcpy(request->ssids[i].ssid, nla_data(attr),
  3633. nla_len(attr));
  3634. i++;
  3635. }
  3636. }
  3637. i = 0;
  3638. if (info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
  3639. nla_for_each_nested(attr,
  3640. info->attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
  3641. tmp) {
  3642. struct nlattr *ssid;
  3643. nla_parse(tb, NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
  3644. nla_data(attr), nla_len(attr),
  3645. nl80211_match_policy);
  3646. ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
  3647. if (ssid) {
  3648. if (nla_len(ssid) > IEEE80211_MAX_SSID_LEN) {
  3649. err = -EINVAL;
  3650. goto out_free;
  3651. }
  3652. memcpy(request->match_sets[i].ssid.ssid,
  3653. nla_data(ssid), nla_len(ssid));
  3654. request->match_sets[i].ssid.ssid_len =
  3655. nla_len(ssid);
  3656. }
  3657. i++;
  3658. }
  3659. }
  3660. if (info->attrs[NL80211_ATTR_IE]) {
  3661. request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  3662. memcpy((void *)request->ie,
  3663. nla_data(info->attrs[NL80211_ATTR_IE]),
  3664. request->ie_len);
  3665. }
  3666. request->dev = dev;
  3667. request->wiphy = &rdev->wiphy;
  3668. request->interval = interval;
  3669. err = rdev->ops->sched_scan_start(&rdev->wiphy, dev, request);
  3670. if (!err) {
  3671. rdev->sched_scan_req = request;
  3672. nl80211_send_sched_scan(rdev, dev,
  3673. NL80211_CMD_START_SCHED_SCAN);
  3674. goto out;
  3675. }
  3676. out_free:
  3677. kfree(request);
  3678. out:
  3679. mutex_unlock(&rdev->sched_scan_mtx);
  3680. return err;
  3681. }
  3682. static int nl80211_stop_sched_scan(struct sk_buff *skb,
  3683. struct genl_info *info)
  3684. {
  3685. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  3686. int err;
  3687. if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
  3688. !rdev->ops->sched_scan_stop)
  3689. return -EOPNOTSUPP;
  3690. mutex_lock(&rdev->sched_scan_mtx);
  3691. err = __cfg80211_stop_sched_scan(rdev, false);
  3692. mutex_unlock(&rdev->sched_scan_mtx);
  3693. return err;
  3694. }
  3695. static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
  3696. u32 seq, int flags,
  3697. struct cfg80211_registered_device *rdev,
  3698. struct wireless_dev *wdev,
  3699. struct cfg80211_internal_bss *intbss)
  3700. {
  3701. struct cfg80211_bss *res = &intbss->pub;
  3702. void *hdr;
  3703. struct nlattr *bss;
  3704. ASSERT_WDEV_LOCK(wdev);
  3705. hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).pid, seq, flags,
  3706. NL80211_CMD_NEW_SCAN_RESULTS);
  3707. if (!hdr)
  3708. return -1;
  3709. genl_dump_check_consistent(cb, hdr, &nl80211_fam);
  3710. if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation) ||
  3711. nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
  3712. goto nla_put_failure;
  3713. bss = nla_nest_start(msg, NL80211_ATTR_BSS);
  3714. if (!bss)
  3715. goto nla_put_failure;
  3716. if ((!is_zero_ether_addr(res->bssid) &&
  3717. nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)) ||
  3718. (res->information_elements && res->len_information_elements &&
  3719. nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
  3720. res->len_information_elements,
  3721. res->information_elements)) ||
  3722. (res->beacon_ies && res->len_beacon_ies &&
  3723. res->beacon_ies != res->information_elements &&
  3724. nla_put(msg, NL80211_BSS_BEACON_IES,
  3725. res->len_beacon_ies, res->beacon_ies)))
  3726. goto nla_put_failure;
  3727. if (res->tsf &&
  3728. nla_put_u64(msg, NL80211_BSS_TSF, res->tsf))
  3729. goto nla_put_failure;
  3730. if (res->beacon_interval &&
  3731. nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
  3732. goto nla_put_failure;
  3733. if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
  3734. nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
  3735. nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
  3736. jiffies_to_msecs(jiffies - intbss->ts)))
  3737. goto nla_put_failure;
  3738. switch (rdev->wiphy.signal_type) {
  3739. case CFG80211_SIGNAL_TYPE_MBM:
  3740. if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
  3741. goto nla_put_failure;
  3742. break;
  3743. case CFG80211_SIGNAL_TYPE_UNSPEC:
  3744. if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
  3745. goto nla_put_failure;
  3746. break;
  3747. default:
  3748. break;
  3749. }
  3750. switch (wdev->iftype) {
  3751. case NL80211_IFTYPE_P2P_CLIENT:
  3752. case NL80211_IFTYPE_STATION:
  3753. if (intbss == wdev->current_bss &&
  3754. nla_put_u32(msg, NL80211_BSS_STATUS,
  3755. NL80211_BSS_STATUS_ASSOCIATED))
  3756. goto nla_put_failure;
  3757. break;
  3758. case NL80211_IFTYPE_ADHOC:
  3759. if (intbss == wdev->current_bss &&
  3760. nla_put_u32(msg, NL80211_BSS_STATUS,
  3761. NL80211_BSS_STATUS_IBSS_JOINED))
  3762. goto nla_put_failure;
  3763. break;
  3764. default:
  3765. break;
  3766. }
  3767. nla_nest_end(msg, bss);
  3768. return genlmsg_end(msg, hdr);
  3769. nla_put_failure:
  3770. genlmsg_cancel(msg, hdr);
  3771. return -EMSGSIZE;
  3772. }
  3773. static int nl80211_dump_scan(struct sk_buff *skb,
  3774. struct netlink_callback *cb)
  3775. {
  3776. struct cfg80211_registered_device *rdev;
  3777. struct net_device *dev;
  3778. struct cfg80211_internal_bss *scan;
  3779. struct wireless_dev *wdev;
  3780. int start = cb->args[1], idx = 0;
  3781. int err;
  3782. err = nl80211_prepare_netdev_dump(skb, cb, &rdev, &dev);
  3783. if (err)
  3784. return err;
  3785. wdev = dev->ieee80211_ptr;
  3786. wdev_lock(wdev);
  3787. spin_lock_bh(&rdev->bss_lock);
  3788. cfg80211_bss_expire(rdev);
  3789. cb->seq = rdev->bss_generation;
  3790. list_for_each_entry(scan, &rdev->bss_list, list) {
  3791. if (++idx <= start)
  3792. continue;
  3793. if (nl80211_send_bss(skb, cb,
  3794. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  3795. rdev, wdev, scan) < 0) {
  3796. idx--;
  3797. break;
  3798. }
  3799. }
  3800. spin_unlock_bh(&rdev->bss_lock);
  3801. wdev_unlock(wdev);
  3802. cb->args[1] = idx;
  3803. nl80211_finish_netdev_dump(rdev);
  3804. return skb->len;
  3805. }
  3806. static int nl80211_send_survey(struct sk_buff *msg, u32 pid, u32 seq,
  3807. int flags, struct net_device *dev,
  3808. struct survey_info *survey)
  3809. {
  3810. void *hdr;
  3811. struct nlattr *infoattr;
  3812. hdr = nl80211hdr_put(msg, pid, seq, flags,
  3813. NL80211_CMD_NEW_SURVEY_RESULTS);
  3814. if (!hdr)
  3815. return -ENOMEM;
  3816. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
  3817. goto nla_put_failure;
  3818. infoattr = nla_nest_start(msg, NL80211_ATTR_SURVEY_INFO);
  3819. if (!infoattr)
  3820. goto nla_put_failure;
  3821. if (nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
  3822. survey->channel->center_freq))
  3823. goto nla_put_failure;
  3824. if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
  3825. nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
  3826. goto nla_put_failure;
  3827. if ((survey->filled & SURVEY_INFO_IN_USE) &&
  3828. nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
  3829. goto nla_put_failure;
  3830. if ((survey->filled & SURVEY_INFO_CHANNEL_TIME) &&
  3831. nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME,
  3832. survey->channel_time))
  3833. goto nla_put_failure;
  3834. if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_BUSY) &&
  3835. nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY,
  3836. survey->channel_time_busy))
  3837. goto nla_put_failure;
  3838. if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_EXT_BUSY) &&
  3839. nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_EXT_BUSY,
  3840. survey->channel_time_ext_busy))
  3841. goto nla_put_failure;
  3842. if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_RX) &&
  3843. nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_RX,
  3844. survey->channel_time_rx))
  3845. goto nla_put_failure;
  3846. if ((survey->filled & SURVEY_INFO_CHANNEL_TIME_TX) &&
  3847. nla_put_u64(msg, NL80211_SURVEY_INFO_CHANNEL_TIME_TX,
  3848. survey->channel_time_tx))
  3849. goto nla_put_failure;
  3850. nla_nest_end(msg, infoattr);
  3851. return genlmsg_end(msg, hdr);
  3852. nla_put_failure:
  3853. genlmsg_cancel(msg, hdr);
  3854. return -EMSGSIZE;
  3855. }
  3856. static int nl80211_dump_survey(struct sk_buff *skb,
  3857. struct netlink_callback *cb)
  3858. {
  3859. struct survey_info survey;
  3860. struct cfg80211_registered_device *dev;
  3861. struct net_device *netdev;
  3862. int survey_idx = cb->args[1];
  3863. int res;
  3864. res = nl80211_prepare_netdev_dump(skb, cb, &dev, &netdev);
  3865. if (res)
  3866. return res;
  3867. if (!dev->ops->dump_survey) {
  3868. res = -EOPNOTSUPP;
  3869. goto out_err;
  3870. }
  3871. while (1) {
  3872. struct ieee80211_channel *chan;
  3873. res = dev->ops->dump_survey(&dev->wiphy, netdev, survey_idx,
  3874. &survey);
  3875. if (res == -ENOENT)
  3876. break;
  3877. if (res)
  3878. goto out_err;
  3879. /* Survey without a channel doesn't make sense */
  3880. if (!survey.channel) {
  3881. res = -EINVAL;
  3882. goto out;
  3883. }
  3884. chan = ieee80211_get_channel(&dev->wiphy,
  3885. survey.channel->center_freq);
  3886. if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
  3887. survey_idx++;
  3888. continue;
  3889. }
  3890. if (nl80211_send_survey(skb,
  3891. NETLINK_CB(cb->skb).pid,
  3892. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  3893. netdev,
  3894. &survey) < 0)
  3895. goto out;
  3896. survey_idx++;
  3897. }
  3898. out:
  3899. cb->args[1] = survey_idx;
  3900. res = skb->len;
  3901. out_err:
  3902. nl80211_finish_netdev_dump(dev);
  3903. return res;
  3904. }
  3905. static bool nl80211_valid_auth_type(enum nl80211_auth_type auth_type)
  3906. {
  3907. return auth_type <= NL80211_AUTHTYPE_MAX;
  3908. }
  3909. static bool nl80211_valid_wpa_versions(u32 wpa_versions)
  3910. {
  3911. return !(wpa_versions & ~(NL80211_WPA_VERSION_1 |
  3912. NL80211_WPA_VERSION_2));
  3913. }
  3914. static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
  3915. {
  3916. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  3917. struct net_device *dev = info->user_ptr[1];
  3918. struct ieee80211_channel *chan;
  3919. const u8 *bssid, *ssid, *ie = NULL;
  3920. int err, ssid_len, ie_len = 0;
  3921. enum nl80211_auth_type auth_type;
  3922. struct key_parse key;
  3923. bool local_state_change;
  3924. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  3925. return -EINVAL;
  3926. if (!info->attrs[NL80211_ATTR_MAC])
  3927. return -EINVAL;
  3928. if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
  3929. return -EINVAL;
  3930. if (!info->attrs[NL80211_ATTR_SSID])
  3931. return -EINVAL;
  3932. if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
  3933. return -EINVAL;
  3934. err = nl80211_parse_key(info, &key);
  3935. if (err)
  3936. return err;
  3937. if (key.idx >= 0) {
  3938. if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
  3939. return -EINVAL;
  3940. if (!key.p.key || !key.p.key_len)
  3941. return -EINVAL;
  3942. if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
  3943. key.p.key_len != WLAN_KEY_LEN_WEP40) &&
  3944. (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
  3945. key.p.key_len != WLAN_KEY_LEN_WEP104))
  3946. return -EINVAL;
  3947. if (key.idx > 4)
  3948. return -EINVAL;
  3949. } else {
  3950. key.p.key_len = 0;
  3951. key.p.key = NULL;
  3952. }
  3953. if (key.idx >= 0) {
  3954. int i;
  3955. bool ok = false;
  3956. for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
  3957. if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
  3958. ok = true;
  3959. break;
  3960. }
  3961. }
  3962. if (!ok)
  3963. return -EINVAL;
  3964. }
  3965. if (!rdev->ops->auth)
  3966. return -EOPNOTSUPP;
  3967. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  3968. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  3969. return -EOPNOTSUPP;
  3970. bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  3971. chan = ieee80211_get_channel(&rdev->wiphy,
  3972. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
  3973. if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
  3974. return -EINVAL;
  3975. ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
  3976. ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
  3977. if (info->attrs[NL80211_ATTR_IE]) {
  3978. ie = nla_data(info->attrs[NL80211_ATTR_IE]);
  3979. ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  3980. }
  3981. auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
  3982. if (!nl80211_valid_auth_type(auth_type))
  3983. return -EINVAL;
  3984. local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
  3985. /*
  3986. * Since we no longer track auth state, ignore
  3987. * requests to only change local state.
  3988. */
  3989. if (local_state_change)
  3990. return 0;
  3991. return cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
  3992. ssid, ssid_len, ie, ie_len,
  3993. key.p.key, key.p.key_len, key.idx);
  3994. }
  3995. static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
  3996. struct genl_info *info,
  3997. struct cfg80211_crypto_settings *settings,
  3998. int cipher_limit)
  3999. {
  4000. memset(settings, 0, sizeof(*settings));
  4001. settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];
  4002. if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
  4003. u16 proto;
  4004. proto = nla_get_u16(
  4005. info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
  4006. settings->control_port_ethertype = cpu_to_be16(proto);
  4007. if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
  4008. proto != ETH_P_PAE)
  4009. return -EINVAL;
  4010. if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
  4011. settings->control_port_no_encrypt = true;
  4012. } else
  4013. settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);
  4014. if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
  4015. void *data;
  4016. int len, i;
  4017. data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
  4018. len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
  4019. settings->n_ciphers_pairwise = len / sizeof(u32);
  4020. if (len % sizeof(u32))
  4021. return -EINVAL;
  4022. if (settings->n_ciphers_pairwise > cipher_limit)
  4023. return -EINVAL;
  4024. memcpy(settings->ciphers_pairwise, data, len);
  4025. for (i = 0; i < settings->n_ciphers_pairwise; i++)
  4026. if (!cfg80211_supported_cipher_suite(
  4027. &rdev->wiphy,
  4028. settings->ciphers_pairwise[i]))
  4029. return -EINVAL;
  4030. }
  4031. if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
  4032. settings->cipher_group =
  4033. nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
  4034. if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
  4035. settings->cipher_group))
  4036. return -EINVAL;
  4037. }
  4038. if (info->attrs[NL80211_ATTR_WPA_VERSIONS]) {
  4039. settings->wpa_versions =
  4040. nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);
  4041. if (!nl80211_valid_wpa_versions(settings->wpa_versions))
  4042. return -EINVAL;
  4043. }
  4044. if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
  4045. void *data;
  4046. int len;
  4047. data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
  4048. len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
  4049. settings->n_akm_suites = len / sizeof(u32);
  4050. if (len % sizeof(u32))
  4051. return -EINVAL;
  4052. if (settings->n_akm_suites > NL80211_MAX_NR_AKM_SUITES)
  4053. return -EINVAL;
  4054. memcpy(settings->akm_suites, data, len);
  4055. }
  4056. return 0;
  4057. }
  4058. static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
  4059. {
  4060. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4061. struct net_device *dev = info->user_ptr[1];
  4062. struct cfg80211_crypto_settings crypto;
  4063. struct ieee80211_channel *chan;
  4064. const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;
  4065. int err, ssid_len, ie_len = 0;
  4066. bool use_mfp = false;
  4067. u32 flags = 0;
  4068. struct ieee80211_ht_cap *ht_capa = NULL;
  4069. struct ieee80211_ht_cap *ht_capa_mask = NULL;
  4070. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  4071. return -EINVAL;
  4072. if (!info->attrs[NL80211_ATTR_MAC] ||
  4073. !info->attrs[NL80211_ATTR_SSID] ||
  4074. !info->attrs[NL80211_ATTR_WIPHY_FREQ])
  4075. return -EINVAL;
  4076. if (!rdev->ops->assoc)
  4077. return -EOPNOTSUPP;
  4078. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4079. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4080. return -EOPNOTSUPP;
  4081. bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4082. chan = ieee80211_get_channel(&rdev->wiphy,
  4083. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
  4084. if (!chan || (chan->flags & IEEE80211_CHAN_DISABLED))
  4085. return -EINVAL;
  4086. ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
  4087. ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
  4088. if (info->attrs[NL80211_ATTR_IE]) {
  4089. ie = nla_data(info->attrs[NL80211_ATTR_IE]);
  4090. ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  4091. }
  4092. if (info->attrs[NL80211_ATTR_USE_MFP]) {
  4093. enum nl80211_mfp mfp =
  4094. nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
  4095. if (mfp == NL80211_MFP_REQUIRED)
  4096. use_mfp = true;
  4097. else if (mfp != NL80211_MFP_NO)
  4098. return -EINVAL;
  4099. }
  4100. if (info->attrs[NL80211_ATTR_PREV_BSSID])
  4101. prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);
  4102. if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
  4103. flags |= ASSOC_REQ_DISABLE_HT;
  4104. if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
  4105. ht_capa_mask =
  4106. nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);
  4107. if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
  4108. if (!ht_capa_mask)
  4109. return -EINVAL;
  4110. ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
  4111. }
  4112. err = nl80211_crypto_settings(rdev, info, &crypto, 1);
  4113. if (!err)
  4114. err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
  4115. ssid, ssid_len, ie, ie_len, use_mfp,
  4116. &crypto, flags, ht_capa,
  4117. ht_capa_mask);
  4118. return err;
  4119. }
  4120. static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
  4121. {
  4122. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4123. struct net_device *dev = info->user_ptr[1];
  4124. const u8 *ie = NULL, *bssid;
  4125. int ie_len = 0;
  4126. u16 reason_code;
  4127. bool local_state_change;
  4128. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  4129. return -EINVAL;
  4130. if (!info->attrs[NL80211_ATTR_MAC])
  4131. return -EINVAL;
  4132. if (!info->attrs[NL80211_ATTR_REASON_CODE])
  4133. return -EINVAL;
  4134. if (!rdev->ops->deauth)
  4135. return -EOPNOTSUPP;
  4136. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4137. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4138. return -EOPNOTSUPP;
  4139. bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4140. reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
  4141. if (reason_code == 0) {
  4142. /* Reason Code 0 is reserved */
  4143. return -EINVAL;
  4144. }
  4145. if (info->attrs[NL80211_ATTR_IE]) {
  4146. ie = nla_data(info->attrs[NL80211_ATTR_IE]);
  4147. ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  4148. }
  4149. local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
  4150. return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
  4151. local_state_change);
  4152. }
  4153. static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
  4154. {
  4155. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4156. struct net_device *dev = info->user_ptr[1];
  4157. const u8 *ie = NULL, *bssid;
  4158. int ie_len = 0;
  4159. u16 reason_code;
  4160. bool local_state_change;
  4161. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  4162. return -EINVAL;
  4163. if (!info->attrs[NL80211_ATTR_MAC])
  4164. return -EINVAL;
  4165. if (!info->attrs[NL80211_ATTR_REASON_CODE])
  4166. return -EINVAL;
  4167. if (!rdev->ops->disassoc)
  4168. return -EOPNOTSUPP;
  4169. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4170. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4171. return -EOPNOTSUPP;
  4172. bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4173. reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
  4174. if (reason_code == 0) {
  4175. /* Reason Code 0 is reserved */
  4176. return -EINVAL;
  4177. }
  4178. if (info->attrs[NL80211_ATTR_IE]) {
  4179. ie = nla_data(info->attrs[NL80211_ATTR_IE]);
  4180. ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  4181. }
  4182. local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];
  4183. return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
  4184. local_state_change);
  4185. }
  4186. static bool
  4187. nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
  4188. int mcast_rate[IEEE80211_NUM_BANDS],
  4189. int rateval)
  4190. {
  4191. struct wiphy *wiphy = &rdev->wiphy;
  4192. bool found = false;
  4193. int band, i;
  4194. for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  4195. struct ieee80211_supported_band *sband;
  4196. sband = wiphy->bands[band];
  4197. if (!sband)
  4198. continue;
  4199. for (i = 0; i < sband->n_bitrates; i++) {
  4200. if (sband->bitrates[i].bitrate == rateval) {
  4201. mcast_rate[band] = i + 1;
  4202. found = true;
  4203. break;
  4204. }
  4205. }
  4206. }
  4207. return found;
  4208. }
  4209. static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
  4210. {
  4211. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4212. struct net_device *dev = info->user_ptr[1];
  4213. struct cfg80211_ibss_params ibss;
  4214. struct wiphy *wiphy;
  4215. struct cfg80211_cached_keys *connkeys = NULL;
  4216. int err;
  4217. memset(&ibss, 0, sizeof(ibss));
  4218. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  4219. return -EINVAL;
  4220. if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
  4221. !info->attrs[NL80211_ATTR_SSID] ||
  4222. !nla_len(info->attrs[NL80211_ATTR_SSID]))
  4223. return -EINVAL;
  4224. ibss.beacon_interval = 100;
  4225. if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
  4226. ibss.beacon_interval =
  4227. nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
  4228. if (ibss.beacon_interval < 1 || ibss.beacon_interval > 10000)
  4229. return -EINVAL;
  4230. }
  4231. if (!rdev->ops->join_ibss)
  4232. return -EOPNOTSUPP;
  4233. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
  4234. return -EOPNOTSUPP;
  4235. wiphy = &rdev->wiphy;
  4236. if (info->attrs[NL80211_ATTR_MAC]) {
  4237. ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4238. if (!is_valid_ether_addr(ibss.bssid))
  4239. return -EINVAL;
  4240. }
  4241. ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
  4242. ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
  4243. if (info->attrs[NL80211_ATTR_IE]) {
  4244. ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
  4245. ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  4246. }
  4247. if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
  4248. enum nl80211_channel_type channel_type;
  4249. if (!nl80211_valid_channel_type(info, &channel_type))
  4250. return -EINVAL;
  4251. if (channel_type != NL80211_CHAN_NO_HT &&
  4252. !(wiphy->features & NL80211_FEATURE_HT_IBSS))
  4253. return -EINVAL;
  4254. ibss.channel_type = channel_type;
  4255. } else {
  4256. ibss.channel_type = NL80211_CHAN_NO_HT;
  4257. }
  4258. ibss.channel = rdev_freq_to_chan(rdev,
  4259. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
  4260. ibss.channel_type);
  4261. if (!ibss.channel ||
  4262. ibss.channel->flags & IEEE80211_CHAN_NO_IBSS ||
  4263. ibss.channel->flags & IEEE80211_CHAN_DISABLED)
  4264. return -EINVAL;
  4265. /* Both channels should be able to initiate communication */
  4266. if ((ibss.channel_type == NL80211_CHAN_HT40PLUS ||
  4267. ibss.channel_type == NL80211_CHAN_HT40MINUS) &&
  4268. !cfg80211_can_beacon_sec_chan(&rdev->wiphy, ibss.channel,
  4269. ibss.channel_type))
  4270. return -EINVAL;
  4271. ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
  4272. ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];
  4273. if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
  4274. u8 *rates =
  4275. nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
  4276. int n_rates =
  4277. nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
  4278. struct ieee80211_supported_band *sband =
  4279. wiphy->bands[ibss.channel->band];
  4280. err = ieee80211_get_ratemask(sband, rates, n_rates,
  4281. &ibss.basic_rates);
  4282. if (err)
  4283. return err;
  4284. }
  4285. if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
  4286. !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
  4287. nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
  4288. return -EINVAL;
  4289. if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
  4290. connkeys = nl80211_parse_connkeys(rdev,
  4291. info->attrs[NL80211_ATTR_KEYS]);
  4292. if (IS_ERR(connkeys))
  4293. return PTR_ERR(connkeys);
  4294. }
  4295. ibss.control_port =
  4296. nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);
  4297. err = cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
  4298. if (err)
  4299. kfree(connkeys);
  4300. return err;
  4301. }
  4302. static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
  4303. {
  4304. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4305. struct net_device *dev = info->user_ptr[1];
  4306. if (!rdev->ops->leave_ibss)
  4307. return -EOPNOTSUPP;
  4308. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
  4309. return -EOPNOTSUPP;
  4310. return cfg80211_leave_ibss(rdev, dev, false);
  4311. }
  4312. #ifdef CONFIG_NL80211_TESTMODE
  4313. static struct genl_multicast_group nl80211_testmode_mcgrp = {
  4314. .name = "testmode",
  4315. };
  4316. static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
  4317. {
  4318. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4319. int err;
  4320. if (!info->attrs[NL80211_ATTR_TESTDATA])
  4321. return -EINVAL;
  4322. err = -EOPNOTSUPP;
  4323. if (rdev->ops->testmode_cmd) {
  4324. rdev->testmode_info = info;
  4325. err = rdev->ops->testmode_cmd(&rdev->wiphy,
  4326. nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
  4327. nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
  4328. rdev->testmode_info = NULL;
  4329. }
  4330. return err;
  4331. }
  4332. static int nl80211_testmode_dump(struct sk_buff *skb,
  4333. struct netlink_callback *cb)
  4334. {
  4335. struct cfg80211_registered_device *rdev;
  4336. int err;
  4337. long phy_idx;
  4338. void *data = NULL;
  4339. int data_len = 0;
  4340. if (cb->args[0]) {
  4341. /*
  4342. * 0 is a valid index, but not valid for args[0],
  4343. * so we need to offset by 1.
  4344. */
  4345. phy_idx = cb->args[0] - 1;
  4346. } else {
  4347. err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize,
  4348. nl80211_fam.attrbuf, nl80211_fam.maxattr,
  4349. nl80211_policy);
  4350. if (err)
  4351. return err;
  4352. if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) {
  4353. phy_idx = nla_get_u32(
  4354. nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]);
  4355. } else {
  4356. struct net_device *netdev;
  4357. err = get_rdev_dev_by_ifindex(sock_net(skb->sk),
  4358. nl80211_fam.attrbuf,
  4359. &rdev, &netdev);
  4360. if (err)
  4361. return err;
  4362. dev_put(netdev);
  4363. phy_idx = rdev->wiphy_idx;
  4364. cfg80211_unlock_rdev(rdev);
  4365. }
  4366. if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA])
  4367. cb->args[1] =
  4368. (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA];
  4369. }
  4370. if (cb->args[1]) {
  4371. data = nla_data((void *)cb->args[1]);
  4372. data_len = nla_len((void *)cb->args[1]);
  4373. }
  4374. mutex_lock(&cfg80211_mutex);
  4375. rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
  4376. if (!rdev) {
  4377. mutex_unlock(&cfg80211_mutex);
  4378. return -ENOENT;
  4379. }
  4380. cfg80211_lock_rdev(rdev);
  4381. mutex_unlock(&cfg80211_mutex);
  4382. if (!rdev->ops->testmode_dump) {
  4383. err = -EOPNOTSUPP;
  4384. goto out_err;
  4385. }
  4386. while (1) {
  4387. void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).pid,
  4388. cb->nlh->nlmsg_seq, NLM_F_MULTI,
  4389. NL80211_CMD_TESTMODE);
  4390. struct nlattr *tmdata;
  4391. if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
  4392. genlmsg_cancel(skb, hdr);
  4393. break;
  4394. }
  4395. tmdata = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
  4396. if (!tmdata) {
  4397. genlmsg_cancel(skb, hdr);
  4398. break;
  4399. }
  4400. err = rdev->ops->testmode_dump(&rdev->wiphy, skb, cb,
  4401. data, data_len);
  4402. nla_nest_end(skb, tmdata);
  4403. if (err == -ENOBUFS || err == -ENOENT) {
  4404. genlmsg_cancel(skb, hdr);
  4405. break;
  4406. } else if (err) {
  4407. genlmsg_cancel(skb, hdr);
  4408. goto out_err;
  4409. }
  4410. genlmsg_end(skb, hdr);
  4411. }
  4412. err = skb->len;
  4413. /* see above */
  4414. cb->args[0] = phy_idx + 1;
  4415. out_err:
  4416. cfg80211_unlock_rdev(rdev);
  4417. return err;
  4418. }
  4419. static struct sk_buff *
  4420. __cfg80211_testmode_alloc_skb(struct cfg80211_registered_device *rdev,
  4421. int approxlen, u32 pid, u32 seq, gfp_t gfp)
  4422. {
  4423. struct sk_buff *skb;
  4424. void *hdr;
  4425. struct nlattr *data;
  4426. skb = nlmsg_new(approxlen + 100, gfp);
  4427. if (!skb)
  4428. return NULL;
  4429. hdr = nl80211hdr_put(skb, pid, seq, 0, NL80211_CMD_TESTMODE);
  4430. if (!hdr) {
  4431. kfree_skb(skb);
  4432. return NULL;
  4433. }
  4434. if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
  4435. goto nla_put_failure;
  4436. data = nla_nest_start(skb, NL80211_ATTR_TESTDATA);
  4437. ((void **)skb->cb)[0] = rdev;
  4438. ((void **)skb->cb)[1] = hdr;
  4439. ((void **)skb->cb)[2] = data;
  4440. return skb;
  4441. nla_put_failure:
  4442. kfree_skb(skb);
  4443. return NULL;
  4444. }
  4445. struct sk_buff *cfg80211_testmode_alloc_reply_skb(struct wiphy *wiphy,
  4446. int approxlen)
  4447. {
  4448. struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  4449. if (WARN_ON(!rdev->testmode_info))
  4450. return NULL;
  4451. return __cfg80211_testmode_alloc_skb(rdev, approxlen,
  4452. rdev->testmode_info->snd_pid,
  4453. rdev->testmode_info->snd_seq,
  4454. GFP_KERNEL);
  4455. }
  4456. EXPORT_SYMBOL(cfg80211_testmode_alloc_reply_skb);
  4457. int cfg80211_testmode_reply(struct sk_buff *skb)
  4458. {
  4459. struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
  4460. void *hdr = ((void **)skb->cb)[1];
  4461. struct nlattr *data = ((void **)skb->cb)[2];
  4462. if (WARN_ON(!rdev->testmode_info)) {
  4463. kfree_skb(skb);
  4464. return -EINVAL;
  4465. }
  4466. nla_nest_end(skb, data);
  4467. genlmsg_end(skb, hdr);
  4468. return genlmsg_reply(skb, rdev->testmode_info);
  4469. }
  4470. EXPORT_SYMBOL(cfg80211_testmode_reply);
  4471. struct sk_buff *cfg80211_testmode_alloc_event_skb(struct wiphy *wiphy,
  4472. int approxlen, gfp_t gfp)
  4473. {
  4474. struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  4475. return __cfg80211_testmode_alloc_skb(rdev, approxlen, 0, 0, gfp);
  4476. }
  4477. EXPORT_SYMBOL(cfg80211_testmode_alloc_event_skb);
  4478. void cfg80211_testmode_event(struct sk_buff *skb, gfp_t gfp)
  4479. {
  4480. void *hdr = ((void **)skb->cb)[1];
  4481. struct nlattr *data = ((void **)skb->cb)[2];
  4482. nla_nest_end(skb, data);
  4483. genlmsg_end(skb, hdr);
  4484. genlmsg_multicast(skb, 0, nl80211_testmode_mcgrp.id, gfp);
  4485. }
  4486. EXPORT_SYMBOL(cfg80211_testmode_event);
  4487. #endif
  4488. static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
  4489. {
  4490. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4491. struct net_device *dev = info->user_ptr[1];
  4492. struct cfg80211_connect_params connect;
  4493. struct wiphy *wiphy;
  4494. struct cfg80211_cached_keys *connkeys = NULL;
  4495. int err;
  4496. memset(&connect, 0, sizeof(connect));
  4497. if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
  4498. return -EINVAL;
  4499. if (!info->attrs[NL80211_ATTR_SSID] ||
  4500. !nla_len(info->attrs[NL80211_ATTR_SSID]))
  4501. return -EINVAL;
  4502. if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
  4503. connect.auth_type =
  4504. nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
  4505. if (!nl80211_valid_auth_type(connect.auth_type))
  4506. return -EINVAL;
  4507. } else
  4508. connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
  4509. connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];
  4510. err = nl80211_crypto_settings(rdev, info, &connect.crypto,
  4511. NL80211_MAX_NR_CIPHER_SUITES);
  4512. if (err)
  4513. return err;
  4514. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4515. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4516. return -EOPNOTSUPP;
  4517. wiphy = &rdev->wiphy;
  4518. connect.bg_scan_period = -1;
  4519. if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
  4520. (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
  4521. connect.bg_scan_period =
  4522. nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
  4523. }
  4524. if (info->attrs[NL80211_ATTR_MAC])
  4525. connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4526. connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
  4527. connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
  4528. if (info->attrs[NL80211_ATTR_IE]) {
  4529. connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
  4530. connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
  4531. }
  4532. if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
  4533. connect.channel =
  4534. ieee80211_get_channel(wiphy,
  4535. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
  4536. if (!connect.channel ||
  4537. connect.channel->flags & IEEE80211_CHAN_DISABLED)
  4538. return -EINVAL;
  4539. }
  4540. if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
  4541. connkeys = nl80211_parse_connkeys(rdev,
  4542. info->attrs[NL80211_ATTR_KEYS]);
  4543. if (IS_ERR(connkeys))
  4544. return PTR_ERR(connkeys);
  4545. }
  4546. if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
  4547. connect.flags |= ASSOC_REQ_DISABLE_HT;
  4548. if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
  4549. memcpy(&connect.ht_capa_mask,
  4550. nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
  4551. sizeof(connect.ht_capa_mask));
  4552. if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
  4553. if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
  4554. return -EINVAL;
  4555. memcpy(&connect.ht_capa,
  4556. nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
  4557. sizeof(connect.ht_capa));
  4558. }
  4559. err = cfg80211_connect(rdev, dev, &connect, connkeys);
  4560. if (err)
  4561. kfree(connkeys);
  4562. return err;
  4563. }
  4564. static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
  4565. {
  4566. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4567. struct net_device *dev = info->user_ptr[1];
  4568. u16 reason;
  4569. if (!info->attrs[NL80211_ATTR_REASON_CODE])
  4570. reason = WLAN_REASON_DEAUTH_LEAVING;
  4571. else
  4572. reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
  4573. if (reason == 0)
  4574. return -EINVAL;
  4575. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4576. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4577. return -EOPNOTSUPP;
  4578. return cfg80211_disconnect(rdev, dev, reason, true);
  4579. }
  4580. static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
  4581. {
  4582. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4583. struct net *net;
  4584. int err;
  4585. u32 pid;
  4586. if (!info->attrs[NL80211_ATTR_PID])
  4587. return -EINVAL;
  4588. pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);
  4589. net = get_net_ns_by_pid(pid);
  4590. if (IS_ERR(net))
  4591. return PTR_ERR(net);
  4592. err = 0;
  4593. /* check if anything to do */
  4594. if (!net_eq(wiphy_net(&rdev->wiphy), net))
  4595. err = cfg80211_switch_netns(rdev, net);
  4596. put_net(net);
  4597. return err;
  4598. }
  4599. static int nl80211_setdel_pmksa(struct sk_buff *skb, struct genl_info *info)
  4600. {
  4601. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4602. int (*rdev_ops)(struct wiphy *wiphy, struct net_device *dev,
  4603. struct cfg80211_pmksa *pmksa) = NULL;
  4604. struct net_device *dev = info->user_ptr[1];
  4605. struct cfg80211_pmksa pmksa;
  4606. memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));
  4607. if (!info->attrs[NL80211_ATTR_MAC])
  4608. return -EINVAL;
  4609. if (!info->attrs[NL80211_ATTR_PMKID])
  4610. return -EINVAL;
  4611. pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);
  4612. pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4613. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4614. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4615. return -EOPNOTSUPP;
  4616. switch (info->genlhdr->cmd) {
  4617. case NL80211_CMD_SET_PMKSA:
  4618. rdev_ops = rdev->ops->set_pmksa;
  4619. break;
  4620. case NL80211_CMD_DEL_PMKSA:
  4621. rdev_ops = rdev->ops->del_pmksa;
  4622. break;
  4623. default:
  4624. WARN_ON(1);
  4625. break;
  4626. }
  4627. if (!rdev_ops)
  4628. return -EOPNOTSUPP;
  4629. return rdev_ops(&rdev->wiphy, dev, &pmksa);
  4630. }
  4631. static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
  4632. {
  4633. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4634. struct net_device *dev = info->user_ptr[1];
  4635. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4636. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
  4637. return -EOPNOTSUPP;
  4638. if (!rdev->ops->flush_pmksa)
  4639. return -EOPNOTSUPP;
  4640. return rdev->ops->flush_pmksa(&rdev->wiphy, dev);
  4641. }
  4642. static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
  4643. {
  4644. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4645. struct net_device *dev = info->user_ptr[1];
  4646. u8 action_code, dialog_token;
  4647. u16 status_code;
  4648. u8 *peer;
  4649. if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
  4650. !rdev->ops->tdls_mgmt)
  4651. return -EOPNOTSUPP;
  4652. if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
  4653. !info->attrs[NL80211_ATTR_STATUS_CODE] ||
  4654. !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
  4655. !info->attrs[NL80211_ATTR_IE] ||
  4656. !info->attrs[NL80211_ATTR_MAC])
  4657. return -EINVAL;
  4658. peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4659. action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
  4660. status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
  4661. dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
  4662. return rdev->ops->tdls_mgmt(&rdev->wiphy, dev, peer, action_code,
  4663. dialog_token, status_code,
  4664. nla_data(info->attrs[NL80211_ATTR_IE]),
  4665. nla_len(info->attrs[NL80211_ATTR_IE]));
  4666. }
  4667. static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
  4668. {
  4669. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4670. struct net_device *dev = info->user_ptr[1];
  4671. enum nl80211_tdls_operation operation;
  4672. u8 *peer;
  4673. if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
  4674. !rdev->ops->tdls_oper)
  4675. return -EOPNOTSUPP;
  4676. if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
  4677. !info->attrs[NL80211_ATTR_MAC])
  4678. return -EINVAL;
  4679. operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
  4680. peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
  4681. return rdev->ops->tdls_oper(&rdev->wiphy, dev, peer, operation);
  4682. }
  4683. static int nl80211_remain_on_channel(struct sk_buff *skb,
  4684. struct genl_info *info)
  4685. {
  4686. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4687. struct net_device *dev = info->user_ptr[1];
  4688. struct ieee80211_channel *chan;
  4689. struct sk_buff *msg;
  4690. void *hdr;
  4691. u64 cookie;
  4692. enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
  4693. u32 freq, duration;
  4694. int err;
  4695. if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
  4696. !info->attrs[NL80211_ATTR_DURATION])
  4697. return -EINVAL;
  4698. duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
  4699. if (!rdev->ops->remain_on_channel ||
  4700. !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
  4701. return -EOPNOTSUPP;
  4702. /*
  4703. * We should be on that channel for at least a minimum amount of
  4704. * time (10ms) but no longer than the driver supports.
  4705. */
  4706. if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
  4707. duration > rdev->wiphy.max_remain_on_channel_duration)
  4708. return -EINVAL;
  4709. if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
  4710. !nl80211_valid_channel_type(info, &channel_type))
  4711. return -EINVAL;
  4712. freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
  4713. chan = rdev_freq_to_chan(rdev, freq, channel_type);
  4714. if (chan == NULL)
  4715. return -EINVAL;
  4716. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  4717. if (!msg)
  4718. return -ENOMEM;
  4719. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  4720. NL80211_CMD_REMAIN_ON_CHANNEL);
  4721. if (IS_ERR(hdr)) {
  4722. err = PTR_ERR(hdr);
  4723. goto free_msg;
  4724. }
  4725. err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
  4726. channel_type, duration, &cookie);
  4727. if (err)
  4728. goto free_msg;
  4729. if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
  4730. goto nla_put_failure;
  4731. genlmsg_end(msg, hdr);
  4732. return genlmsg_reply(msg, info);
  4733. nla_put_failure:
  4734. err = -ENOBUFS;
  4735. free_msg:
  4736. nlmsg_free(msg);
  4737. return err;
  4738. }
  4739. static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
  4740. struct genl_info *info)
  4741. {
  4742. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4743. struct net_device *dev = info->user_ptr[1];
  4744. u64 cookie;
  4745. if (!info->attrs[NL80211_ATTR_COOKIE])
  4746. return -EINVAL;
  4747. if (!rdev->ops->cancel_remain_on_channel)
  4748. return -EOPNOTSUPP;
  4749. cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
  4750. return rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
  4751. }
  4752. static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
  4753. u8 *rates, u8 rates_len)
  4754. {
  4755. u8 i;
  4756. u32 mask = 0;
  4757. for (i = 0; i < rates_len; i++) {
  4758. int rate = (rates[i] & 0x7f) * 5;
  4759. int ridx;
  4760. for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
  4761. struct ieee80211_rate *srate =
  4762. &sband->bitrates[ridx];
  4763. if (rate == srate->bitrate) {
  4764. mask |= 1 << ridx;
  4765. break;
  4766. }
  4767. }
  4768. if (ridx == sband->n_bitrates)
  4769. return 0; /* rate not found */
  4770. }
  4771. return mask;
  4772. }
  4773. static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
  4774. u8 *rates, u8 rates_len,
  4775. u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
  4776. {
  4777. u8 i;
  4778. memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);
  4779. for (i = 0; i < rates_len; i++) {
  4780. int ridx, rbit;
  4781. ridx = rates[i] / 8;
  4782. rbit = BIT(rates[i] % 8);
  4783. /* check validity */
  4784. if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
  4785. return false;
  4786. /* check availability */
  4787. if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
  4788. mcs[ridx] |= rbit;
  4789. else
  4790. return false;
  4791. }
  4792. return true;
  4793. }
  4794. static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
  4795. [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
  4796. .len = NL80211_MAX_SUPP_RATES },
  4797. [NL80211_TXRATE_MCS] = { .type = NLA_BINARY,
  4798. .len = NL80211_MAX_SUPP_HT_RATES },
  4799. };
  4800. static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
  4801. struct genl_info *info)
  4802. {
  4803. struct nlattr *tb[NL80211_TXRATE_MAX + 1];
  4804. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4805. struct cfg80211_bitrate_mask mask;
  4806. int rem, i;
  4807. struct net_device *dev = info->user_ptr[1];
  4808. struct nlattr *tx_rates;
  4809. struct ieee80211_supported_band *sband;
  4810. if (info->attrs[NL80211_ATTR_TX_RATES] == NULL)
  4811. return -EINVAL;
  4812. if (!rdev->ops->set_bitrate_mask)
  4813. return -EOPNOTSUPP;
  4814. memset(&mask, 0, sizeof(mask));
  4815. /* Default to all rates enabled */
  4816. for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
  4817. sband = rdev->wiphy.bands[i];
  4818. mask.control[i].legacy =
  4819. sband ? (1 << sband->n_bitrates) - 1 : 0;
  4820. if (sband)
  4821. memcpy(mask.control[i].mcs,
  4822. sband->ht_cap.mcs.rx_mask,
  4823. sizeof(mask.control[i].mcs));
  4824. else
  4825. memset(mask.control[i].mcs, 0,
  4826. sizeof(mask.control[i].mcs));
  4827. }
  4828. /*
  4829. * The nested attribute uses enum nl80211_band as the index. This maps
  4830. * directly to the enum ieee80211_band values used in cfg80211.
  4831. */
  4832. BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
  4833. nla_for_each_nested(tx_rates, info->attrs[NL80211_ATTR_TX_RATES], rem)
  4834. {
  4835. enum ieee80211_band band = nla_type(tx_rates);
  4836. if (band < 0 || band >= IEEE80211_NUM_BANDS)
  4837. return -EINVAL;
  4838. sband = rdev->wiphy.bands[band];
  4839. if (sband == NULL)
  4840. return -EINVAL;
  4841. nla_parse(tb, NL80211_TXRATE_MAX, nla_data(tx_rates),
  4842. nla_len(tx_rates), nl80211_txattr_policy);
  4843. if (tb[NL80211_TXRATE_LEGACY]) {
  4844. mask.control[band].legacy = rateset_to_mask(
  4845. sband,
  4846. nla_data(tb[NL80211_TXRATE_LEGACY]),
  4847. nla_len(tb[NL80211_TXRATE_LEGACY]));
  4848. if ((mask.control[band].legacy == 0) &&
  4849. nla_len(tb[NL80211_TXRATE_LEGACY]))
  4850. return -EINVAL;
  4851. }
  4852. if (tb[NL80211_TXRATE_MCS]) {
  4853. if (!ht_rateset_to_mask(
  4854. sband,
  4855. nla_data(tb[NL80211_TXRATE_MCS]),
  4856. nla_len(tb[NL80211_TXRATE_MCS]),
  4857. mask.control[band].mcs))
  4858. return -EINVAL;
  4859. }
  4860. if (mask.control[band].legacy == 0) {
  4861. /* don't allow empty legacy rates if HT
  4862. * is not even supported. */
  4863. if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
  4864. return -EINVAL;
  4865. for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
  4866. if (mask.control[band].mcs[i])
  4867. break;
  4868. /* legacy and mcs rates may not be both empty */
  4869. if (i == IEEE80211_HT_MCS_MASK_LEN)
  4870. return -EINVAL;
  4871. }
  4872. }
  4873. return rdev->ops->set_bitrate_mask(&rdev->wiphy, dev, NULL, &mask);
  4874. }
  4875. static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
  4876. {
  4877. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4878. struct net_device *dev = info->user_ptr[1];
  4879. u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;
  4880. if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
  4881. return -EINVAL;
  4882. if (info->attrs[NL80211_ATTR_FRAME_TYPE])
  4883. frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);
  4884. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4885. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
  4886. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
  4887. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  4888. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
  4889. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
  4890. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  4891. return -EOPNOTSUPP;
  4892. /* not much point in registering if we can't reply */
  4893. if (!rdev->ops->mgmt_tx)
  4894. return -EOPNOTSUPP;
  4895. return cfg80211_mlme_register_mgmt(dev->ieee80211_ptr, info->snd_pid,
  4896. frame_type,
  4897. nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
  4898. nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
  4899. }
  4900. static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
  4901. {
  4902. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4903. struct net_device *dev = info->user_ptr[1];
  4904. struct ieee80211_channel *chan;
  4905. enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
  4906. bool channel_type_valid = false;
  4907. u32 freq;
  4908. int err;
  4909. void *hdr = NULL;
  4910. u64 cookie;
  4911. struct sk_buff *msg = NULL;
  4912. unsigned int wait = 0;
  4913. bool offchan, no_cck, dont_wait_for_ack;
  4914. dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
  4915. if (!info->attrs[NL80211_ATTR_FRAME] ||
  4916. !info->attrs[NL80211_ATTR_WIPHY_FREQ])
  4917. return -EINVAL;
  4918. if (!rdev->ops->mgmt_tx)
  4919. return -EOPNOTSUPP;
  4920. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4921. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
  4922. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
  4923. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  4924. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
  4925. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
  4926. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  4927. return -EOPNOTSUPP;
  4928. if (info->attrs[NL80211_ATTR_DURATION]) {
  4929. if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
  4930. return -EINVAL;
  4931. wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
  4932. /*
  4933. * We should wait on the channel for at least a minimum amount
  4934. * of time (10ms) but no longer than the driver supports.
  4935. */
  4936. if (wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
  4937. wait > rdev->wiphy.max_remain_on_channel_duration)
  4938. return -EINVAL;
  4939. }
  4940. if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
  4941. if (!nl80211_valid_channel_type(info, &channel_type))
  4942. return -EINVAL;
  4943. channel_type_valid = true;
  4944. }
  4945. offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];
  4946. if (offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
  4947. return -EINVAL;
  4948. no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);
  4949. freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
  4950. chan = rdev_freq_to_chan(rdev, freq, channel_type);
  4951. if (chan == NULL)
  4952. return -EINVAL;
  4953. if (!dont_wait_for_ack) {
  4954. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  4955. if (!msg)
  4956. return -ENOMEM;
  4957. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  4958. NL80211_CMD_FRAME);
  4959. if (IS_ERR(hdr)) {
  4960. err = PTR_ERR(hdr);
  4961. goto free_msg;
  4962. }
  4963. }
  4964. err = cfg80211_mlme_mgmt_tx(rdev, dev, chan, offchan, channel_type,
  4965. channel_type_valid, wait,
  4966. nla_data(info->attrs[NL80211_ATTR_FRAME]),
  4967. nla_len(info->attrs[NL80211_ATTR_FRAME]),
  4968. no_cck, dont_wait_for_ack, &cookie);
  4969. if (err)
  4970. goto free_msg;
  4971. if (msg) {
  4972. if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
  4973. goto nla_put_failure;
  4974. genlmsg_end(msg, hdr);
  4975. return genlmsg_reply(msg, info);
  4976. }
  4977. return 0;
  4978. nla_put_failure:
  4979. err = -ENOBUFS;
  4980. free_msg:
  4981. nlmsg_free(msg);
  4982. return err;
  4983. }
  4984. static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
  4985. {
  4986. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  4987. struct net_device *dev = info->user_ptr[1];
  4988. u64 cookie;
  4989. if (!info->attrs[NL80211_ATTR_COOKIE])
  4990. return -EINVAL;
  4991. if (!rdev->ops->mgmt_tx_cancel_wait)
  4992. return -EOPNOTSUPP;
  4993. if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
  4994. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
  4995. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
  4996. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
  4997. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
  4998. dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
  4999. return -EOPNOTSUPP;
  5000. cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
  5001. return rdev->ops->mgmt_tx_cancel_wait(&rdev->wiphy, dev, cookie);
  5002. }
  5003. static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
  5004. {
  5005. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5006. struct wireless_dev *wdev;
  5007. struct net_device *dev = info->user_ptr[1];
  5008. u8 ps_state;
  5009. bool state;
  5010. int err;
  5011. if (!info->attrs[NL80211_ATTR_PS_STATE])
  5012. return -EINVAL;
  5013. ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);
  5014. if (ps_state != NL80211_PS_DISABLED && ps_state != NL80211_PS_ENABLED)
  5015. return -EINVAL;
  5016. wdev = dev->ieee80211_ptr;
  5017. if (!rdev->ops->set_power_mgmt)
  5018. return -EOPNOTSUPP;
  5019. state = (ps_state == NL80211_PS_ENABLED) ? true : false;
  5020. if (state == wdev->ps)
  5021. return 0;
  5022. err = rdev->ops->set_power_mgmt(wdev->wiphy, dev, state,
  5023. wdev->ps_timeout);
  5024. if (!err)
  5025. wdev->ps = state;
  5026. return err;
  5027. }
  5028. static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
  5029. {
  5030. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5031. enum nl80211_ps_state ps_state;
  5032. struct wireless_dev *wdev;
  5033. struct net_device *dev = info->user_ptr[1];
  5034. struct sk_buff *msg;
  5035. void *hdr;
  5036. int err;
  5037. wdev = dev->ieee80211_ptr;
  5038. if (!rdev->ops->set_power_mgmt)
  5039. return -EOPNOTSUPP;
  5040. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  5041. if (!msg)
  5042. return -ENOMEM;
  5043. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  5044. NL80211_CMD_GET_POWER_SAVE);
  5045. if (!hdr) {
  5046. err = -ENOBUFS;
  5047. goto free_msg;
  5048. }
  5049. if (wdev->ps)
  5050. ps_state = NL80211_PS_ENABLED;
  5051. else
  5052. ps_state = NL80211_PS_DISABLED;
  5053. if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
  5054. goto nla_put_failure;
  5055. genlmsg_end(msg, hdr);
  5056. return genlmsg_reply(msg, info);
  5057. nla_put_failure:
  5058. err = -ENOBUFS;
  5059. free_msg:
  5060. nlmsg_free(msg);
  5061. return err;
  5062. }
  5063. static struct nla_policy
  5064. nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
  5065. [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
  5066. [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
  5067. [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
  5068. };
  5069. static int nl80211_set_cqm_rssi(struct genl_info *info,
  5070. s32 threshold, u32 hysteresis)
  5071. {
  5072. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5073. struct wireless_dev *wdev;
  5074. struct net_device *dev = info->user_ptr[1];
  5075. if (threshold > 0)
  5076. return -EINVAL;
  5077. wdev = dev->ieee80211_ptr;
  5078. if (!rdev->ops->set_cqm_rssi_config)
  5079. return -EOPNOTSUPP;
  5080. if (wdev->iftype != NL80211_IFTYPE_STATION &&
  5081. wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
  5082. return -EOPNOTSUPP;
  5083. return rdev->ops->set_cqm_rssi_config(wdev->wiphy, dev,
  5084. threshold, hysteresis);
  5085. }
  5086. static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
  5087. {
  5088. struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
  5089. struct nlattr *cqm;
  5090. int err;
  5091. cqm = info->attrs[NL80211_ATTR_CQM];
  5092. if (!cqm) {
  5093. err = -EINVAL;
  5094. goto out;
  5095. }
  5096. err = nla_parse_nested(attrs, NL80211_ATTR_CQM_MAX, cqm,
  5097. nl80211_attr_cqm_policy);
  5098. if (err)
  5099. goto out;
  5100. if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
  5101. attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
  5102. s32 threshold;
  5103. u32 hysteresis;
  5104. threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
  5105. hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
  5106. err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
  5107. } else
  5108. err = -EINVAL;
  5109. out:
  5110. return err;
  5111. }
  5112. static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
  5113. {
  5114. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5115. struct net_device *dev = info->user_ptr[1];
  5116. struct mesh_config cfg;
  5117. struct mesh_setup setup;
  5118. int err;
  5119. /* start with default */
  5120. memcpy(&cfg, &default_mesh_config, sizeof(cfg));
  5121. memcpy(&setup, &default_mesh_setup, sizeof(setup));
  5122. if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
  5123. /* and parse parameters if given */
  5124. err = nl80211_parse_mesh_config(info, &cfg, NULL);
  5125. if (err)
  5126. return err;
  5127. }
  5128. if (!info->attrs[NL80211_ATTR_MESH_ID] ||
  5129. !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
  5130. return -EINVAL;
  5131. setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
  5132. setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
  5133. if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
  5134. !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
  5135. nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
  5136. return -EINVAL;
  5137. if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
  5138. /* parse additional setup parameters if given */
  5139. err = nl80211_parse_mesh_setup(info, &setup);
  5140. if (err)
  5141. return err;
  5142. }
  5143. if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
  5144. enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
  5145. if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE] &&
  5146. !nl80211_valid_channel_type(info, &channel_type))
  5147. return -EINVAL;
  5148. setup.channel = rdev_freq_to_chan(rdev,
  5149. nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]),
  5150. channel_type);
  5151. if (!setup.channel)
  5152. return -EINVAL;
  5153. setup.channel_type = channel_type;
  5154. } else {
  5155. /* cfg80211_join_mesh() will sort it out */
  5156. setup.channel = NULL;
  5157. }
  5158. return cfg80211_join_mesh(rdev, dev, &setup, &cfg);
  5159. }
  5160. static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
  5161. {
  5162. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5163. struct net_device *dev = info->user_ptr[1];
  5164. return cfg80211_leave_mesh(rdev, dev);
  5165. }
  5166. static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
  5167. {
  5168. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5169. struct sk_buff *msg;
  5170. void *hdr;
  5171. if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
  5172. return -EOPNOTSUPP;
  5173. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  5174. if (!msg)
  5175. return -ENOMEM;
  5176. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  5177. NL80211_CMD_GET_WOWLAN);
  5178. if (!hdr)
  5179. goto nla_put_failure;
  5180. if (rdev->wowlan) {
  5181. struct nlattr *nl_wowlan;
  5182. nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS);
  5183. if (!nl_wowlan)
  5184. goto nla_put_failure;
  5185. if ((rdev->wowlan->any &&
  5186. nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
  5187. (rdev->wowlan->disconnect &&
  5188. nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
  5189. (rdev->wowlan->magic_pkt &&
  5190. nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
  5191. (rdev->wowlan->gtk_rekey_failure &&
  5192. nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
  5193. (rdev->wowlan->eap_identity_req &&
  5194. nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
  5195. (rdev->wowlan->four_way_handshake &&
  5196. nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
  5197. (rdev->wowlan->rfkill_release &&
  5198. nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
  5199. goto nla_put_failure;
  5200. if (rdev->wowlan->n_patterns) {
  5201. struct nlattr *nl_pats, *nl_pat;
  5202. int i, pat_len;
  5203. nl_pats = nla_nest_start(msg,
  5204. NL80211_WOWLAN_TRIG_PKT_PATTERN);
  5205. if (!nl_pats)
  5206. goto nla_put_failure;
  5207. for (i = 0; i < rdev->wowlan->n_patterns; i++) {
  5208. nl_pat = nla_nest_start(msg, i + 1);
  5209. if (!nl_pat)
  5210. goto nla_put_failure;
  5211. pat_len = rdev->wowlan->patterns[i].pattern_len;
  5212. if (nla_put(msg, NL80211_WOWLAN_PKTPAT_MASK,
  5213. DIV_ROUND_UP(pat_len, 8),
  5214. rdev->wowlan->patterns[i].mask) ||
  5215. nla_put(msg, NL80211_WOWLAN_PKTPAT_PATTERN,
  5216. pat_len,
  5217. rdev->wowlan->patterns[i].pattern))
  5218. goto nla_put_failure;
  5219. nla_nest_end(msg, nl_pat);
  5220. }
  5221. nla_nest_end(msg, nl_pats);
  5222. }
  5223. nla_nest_end(msg, nl_wowlan);
  5224. }
  5225. genlmsg_end(msg, hdr);
  5226. return genlmsg_reply(msg, info);
  5227. nla_put_failure:
  5228. nlmsg_free(msg);
  5229. return -ENOBUFS;
  5230. }
  5231. static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
  5232. {
  5233. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5234. struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
  5235. struct cfg80211_wowlan no_triggers = {};
  5236. struct cfg80211_wowlan new_triggers = {};
  5237. struct wiphy_wowlan_support *wowlan = &rdev->wiphy.wowlan;
  5238. int err, i;
  5239. bool prev_enabled = rdev->wowlan;
  5240. if (!rdev->wiphy.wowlan.flags && !rdev->wiphy.wowlan.n_patterns)
  5241. return -EOPNOTSUPP;
  5242. if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS])
  5243. goto no_triggers;
  5244. err = nla_parse(tb, MAX_NL80211_WOWLAN_TRIG,
  5245. nla_data(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
  5246. nla_len(info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]),
  5247. nl80211_wowlan_policy);
  5248. if (err)
  5249. return err;
  5250. if (tb[NL80211_WOWLAN_TRIG_ANY]) {
  5251. if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
  5252. return -EINVAL;
  5253. new_triggers.any = true;
  5254. }
  5255. if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
  5256. if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
  5257. return -EINVAL;
  5258. new_triggers.disconnect = true;
  5259. }
  5260. if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
  5261. if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
  5262. return -EINVAL;
  5263. new_triggers.magic_pkt = true;
  5264. }
  5265. if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
  5266. return -EINVAL;
  5267. if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
  5268. if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
  5269. return -EINVAL;
  5270. new_triggers.gtk_rekey_failure = true;
  5271. }
  5272. if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
  5273. if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
  5274. return -EINVAL;
  5275. new_triggers.eap_identity_req = true;
  5276. }
  5277. if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
  5278. if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
  5279. return -EINVAL;
  5280. new_triggers.four_way_handshake = true;
  5281. }
  5282. if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
  5283. if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
  5284. return -EINVAL;
  5285. new_triggers.rfkill_release = true;
  5286. }
  5287. if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
  5288. struct nlattr *pat;
  5289. int n_patterns = 0;
  5290. int rem, pat_len, mask_len;
  5291. struct nlattr *pat_tb[NUM_NL80211_WOWLAN_PKTPAT];
  5292. nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
  5293. rem)
  5294. n_patterns++;
  5295. if (n_patterns > wowlan->n_patterns)
  5296. return -EINVAL;
  5297. new_triggers.patterns = kcalloc(n_patterns,
  5298. sizeof(new_triggers.patterns[0]),
  5299. GFP_KERNEL);
  5300. if (!new_triggers.patterns)
  5301. return -ENOMEM;
  5302. new_triggers.n_patterns = n_patterns;
  5303. i = 0;
  5304. nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
  5305. rem) {
  5306. nla_parse(pat_tb, MAX_NL80211_WOWLAN_PKTPAT,
  5307. nla_data(pat), nla_len(pat), NULL);
  5308. err = -EINVAL;
  5309. if (!pat_tb[NL80211_WOWLAN_PKTPAT_MASK] ||
  5310. !pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN])
  5311. goto error;
  5312. pat_len = nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]);
  5313. mask_len = DIV_ROUND_UP(pat_len, 8);
  5314. if (nla_len(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]) !=
  5315. mask_len)
  5316. goto error;
  5317. if (pat_len > wowlan->pattern_max_len ||
  5318. pat_len < wowlan->pattern_min_len)
  5319. goto error;
  5320. new_triggers.patterns[i].mask =
  5321. kmalloc(mask_len + pat_len, GFP_KERNEL);
  5322. if (!new_triggers.patterns[i].mask) {
  5323. err = -ENOMEM;
  5324. goto error;
  5325. }
  5326. new_triggers.patterns[i].pattern =
  5327. new_triggers.patterns[i].mask + mask_len;
  5328. memcpy(new_triggers.patterns[i].mask,
  5329. nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_MASK]),
  5330. mask_len);
  5331. new_triggers.patterns[i].pattern_len = pat_len;
  5332. memcpy(new_triggers.patterns[i].pattern,
  5333. nla_data(pat_tb[NL80211_WOWLAN_PKTPAT_PATTERN]),
  5334. pat_len);
  5335. i++;
  5336. }
  5337. }
  5338. if (memcmp(&new_triggers, &no_triggers, sizeof(new_triggers))) {
  5339. struct cfg80211_wowlan *ntrig;
  5340. ntrig = kmemdup(&new_triggers, sizeof(new_triggers),
  5341. GFP_KERNEL);
  5342. if (!ntrig) {
  5343. err = -ENOMEM;
  5344. goto error;
  5345. }
  5346. cfg80211_rdev_free_wowlan(rdev);
  5347. rdev->wowlan = ntrig;
  5348. } else {
  5349. no_triggers:
  5350. cfg80211_rdev_free_wowlan(rdev);
  5351. rdev->wowlan = NULL;
  5352. }
  5353. if (rdev->ops->set_wakeup && prev_enabled != !!rdev->wowlan)
  5354. rdev->ops->set_wakeup(&rdev->wiphy, rdev->wowlan);
  5355. return 0;
  5356. error:
  5357. for (i = 0; i < new_triggers.n_patterns; i++)
  5358. kfree(new_triggers.patterns[i].mask);
  5359. kfree(new_triggers.patterns);
  5360. return err;
  5361. }
  5362. static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
  5363. {
  5364. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5365. struct net_device *dev = info->user_ptr[1];
  5366. struct wireless_dev *wdev = dev->ieee80211_ptr;
  5367. struct nlattr *tb[NUM_NL80211_REKEY_DATA];
  5368. struct cfg80211_gtk_rekey_data rekey_data;
  5369. int err;
  5370. if (!info->attrs[NL80211_ATTR_REKEY_DATA])
  5371. return -EINVAL;
  5372. err = nla_parse(tb, MAX_NL80211_REKEY_DATA,
  5373. nla_data(info->attrs[NL80211_ATTR_REKEY_DATA]),
  5374. nla_len(info->attrs[NL80211_ATTR_REKEY_DATA]),
  5375. nl80211_rekey_policy);
  5376. if (err)
  5377. return err;
  5378. if (nla_len(tb[NL80211_REKEY_DATA_REPLAY_CTR]) != NL80211_REPLAY_CTR_LEN)
  5379. return -ERANGE;
  5380. if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN)
  5381. return -ERANGE;
  5382. if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN)
  5383. return -ERANGE;
  5384. memcpy(rekey_data.kek, nla_data(tb[NL80211_REKEY_DATA_KEK]),
  5385. NL80211_KEK_LEN);
  5386. memcpy(rekey_data.kck, nla_data(tb[NL80211_REKEY_DATA_KCK]),
  5387. NL80211_KCK_LEN);
  5388. memcpy(rekey_data.replay_ctr,
  5389. nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]),
  5390. NL80211_REPLAY_CTR_LEN);
  5391. wdev_lock(wdev);
  5392. if (!wdev->current_bss) {
  5393. err = -ENOTCONN;
  5394. goto out;
  5395. }
  5396. if (!rdev->ops->set_rekey_data) {
  5397. err = -EOPNOTSUPP;
  5398. goto out;
  5399. }
  5400. err = rdev->ops->set_rekey_data(&rdev->wiphy, dev, &rekey_data);
  5401. out:
  5402. wdev_unlock(wdev);
  5403. return err;
  5404. }
  5405. static int nl80211_register_unexpected_frame(struct sk_buff *skb,
  5406. struct genl_info *info)
  5407. {
  5408. struct net_device *dev = info->user_ptr[1];
  5409. struct wireless_dev *wdev = dev->ieee80211_ptr;
  5410. if (wdev->iftype != NL80211_IFTYPE_AP &&
  5411. wdev->iftype != NL80211_IFTYPE_P2P_GO)
  5412. return -EINVAL;
  5413. if (wdev->ap_unexpected_nlpid)
  5414. return -EBUSY;
  5415. wdev->ap_unexpected_nlpid = info->snd_pid;
  5416. return 0;
  5417. }
  5418. static int nl80211_probe_client(struct sk_buff *skb,
  5419. struct genl_info *info)
  5420. {
  5421. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5422. struct net_device *dev = info->user_ptr[1];
  5423. struct wireless_dev *wdev = dev->ieee80211_ptr;
  5424. struct sk_buff *msg;
  5425. void *hdr;
  5426. const u8 *addr;
  5427. u64 cookie;
  5428. int err;
  5429. if (wdev->iftype != NL80211_IFTYPE_AP &&
  5430. wdev->iftype != NL80211_IFTYPE_P2P_GO)
  5431. return -EOPNOTSUPP;
  5432. if (!info->attrs[NL80211_ATTR_MAC])
  5433. return -EINVAL;
  5434. if (!rdev->ops->probe_client)
  5435. return -EOPNOTSUPP;
  5436. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  5437. if (!msg)
  5438. return -ENOMEM;
  5439. hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
  5440. NL80211_CMD_PROBE_CLIENT);
  5441. if (IS_ERR(hdr)) {
  5442. err = PTR_ERR(hdr);
  5443. goto free_msg;
  5444. }
  5445. addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
  5446. err = rdev->ops->probe_client(&rdev->wiphy, dev, addr, &cookie);
  5447. if (err)
  5448. goto free_msg;
  5449. if (nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
  5450. goto nla_put_failure;
  5451. genlmsg_end(msg, hdr);
  5452. return genlmsg_reply(msg, info);
  5453. nla_put_failure:
  5454. err = -ENOBUFS;
  5455. free_msg:
  5456. nlmsg_free(msg);
  5457. return err;
  5458. }
  5459. static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
  5460. {
  5461. struct cfg80211_registered_device *rdev = info->user_ptr[0];
  5462. if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
  5463. return -EOPNOTSUPP;
  5464. if (rdev->ap_beacons_nlpid)
  5465. return -EBUSY;
  5466. rdev->ap_beacons_nlpid = info->snd_pid;
  5467. return 0;
  5468. }
  5469. #define NL80211_FLAG_NEED_WIPHY 0x01
  5470. #define NL80211_FLAG_NEED_NETDEV 0x02
  5471. #define NL80211_FLAG_NEED_RTNL 0x04
  5472. #define NL80211_FLAG_CHECK_NETDEV_UP 0x08
  5473. #define NL80211_FLAG_NEED_NETDEV_UP (NL80211_FLAG_NEED_NETDEV |\
  5474. NL80211_FLAG_CHECK_NETDEV_UP)
  5475. static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb,
  5476. struct genl_info *info)
  5477. {
  5478. struct cfg80211_registered_device *rdev;
  5479. struct net_device *dev;
  5480. int err;
  5481. bool rtnl = ops->internal_flags & NL80211_FLAG_NEED_RTNL;
  5482. if (rtnl)
  5483. rtnl_lock();
  5484. if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) {
  5485. rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
  5486. if (IS_ERR(rdev)) {
  5487. if (rtnl)
  5488. rtnl_unlock();
  5489. return PTR_ERR(rdev);
  5490. }
  5491. info->user_ptr[0] = rdev;
  5492. } else if (ops->internal_flags & NL80211_FLAG_NEED_NETDEV) {
  5493. err = get_rdev_dev_by_ifindex(genl_info_net(info), info->attrs,
  5494. &rdev, &dev);
  5495. if (err) {
  5496. if (rtnl)
  5497. rtnl_unlock();
  5498. return err;
  5499. }
  5500. if (ops->internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
  5501. !netif_running(dev)) {
  5502. cfg80211_unlock_rdev(rdev);
  5503. dev_put(dev);
  5504. if (rtnl)
  5505. rtnl_unlock();
  5506. return -ENETDOWN;
  5507. }
  5508. info->user_ptr[0] = rdev;
  5509. info->user_ptr[1] = dev;
  5510. }
  5511. return 0;
  5512. }
  5513. static void nl80211_post_doit(struct genl_ops *ops, struct sk_buff *skb,
  5514. struct genl_info *info)
  5515. {
  5516. if (info->user_ptr[0])
  5517. cfg80211_unlock_rdev(info->user_ptr[0]);
  5518. if (info->user_ptr[1])
  5519. dev_put(info->user_ptr[1]);
  5520. if (ops->internal_flags & NL80211_FLAG_NEED_RTNL)
  5521. rtnl_unlock();
  5522. }
  5523. static struct genl_ops nl80211_ops[] = {
  5524. {
  5525. .cmd = NL80211_CMD_GET_WIPHY,
  5526. .doit = nl80211_get_wiphy,
  5527. .dumpit = nl80211_dump_wiphy,
  5528. .policy = nl80211_policy,
  5529. /* can be retrieved by unprivileged users */
  5530. .internal_flags = NL80211_FLAG_NEED_WIPHY,
  5531. },
  5532. {
  5533. .cmd = NL80211_CMD_SET_WIPHY,
  5534. .doit = nl80211_set_wiphy,
  5535. .policy = nl80211_policy,
  5536. .flags = GENL_ADMIN_PERM,
  5537. .internal_flags = NL80211_FLAG_NEED_RTNL,
  5538. },
  5539. {
  5540. .cmd = NL80211_CMD_GET_INTERFACE,
  5541. .doit = nl80211_get_interface,
  5542. .dumpit = nl80211_dump_interface,
  5543. .policy = nl80211_policy,
  5544. /* can be retrieved by unprivileged users */
  5545. .internal_flags = NL80211_FLAG_NEED_NETDEV,
  5546. },
  5547. {
  5548. .cmd = NL80211_CMD_SET_INTERFACE,
  5549. .doit = nl80211_set_interface,
  5550. .policy = nl80211_policy,
  5551. .flags = GENL_ADMIN_PERM,
  5552. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5553. NL80211_FLAG_NEED_RTNL,
  5554. },
  5555. {
  5556. .cmd = NL80211_CMD_NEW_INTERFACE,
  5557. .doit = nl80211_new_interface,
  5558. .policy = nl80211_policy,
  5559. .flags = GENL_ADMIN_PERM,
  5560. .internal_flags = NL80211_FLAG_NEED_WIPHY |
  5561. NL80211_FLAG_NEED_RTNL,
  5562. },
  5563. {
  5564. .cmd = NL80211_CMD_DEL_INTERFACE,
  5565. .doit = nl80211_del_interface,
  5566. .policy = nl80211_policy,
  5567. .flags = GENL_ADMIN_PERM,
  5568. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5569. NL80211_FLAG_NEED_RTNL,
  5570. },
  5571. {
  5572. .cmd = NL80211_CMD_GET_KEY,
  5573. .doit = nl80211_get_key,
  5574. .policy = nl80211_policy,
  5575. .flags = GENL_ADMIN_PERM,
  5576. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5577. NL80211_FLAG_NEED_RTNL,
  5578. },
  5579. {
  5580. .cmd = NL80211_CMD_SET_KEY,
  5581. .doit = nl80211_set_key,
  5582. .policy = nl80211_policy,
  5583. .flags = GENL_ADMIN_PERM,
  5584. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5585. NL80211_FLAG_NEED_RTNL,
  5586. },
  5587. {
  5588. .cmd = NL80211_CMD_NEW_KEY,
  5589. .doit = nl80211_new_key,
  5590. .policy = nl80211_policy,
  5591. .flags = GENL_ADMIN_PERM,
  5592. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5593. NL80211_FLAG_NEED_RTNL,
  5594. },
  5595. {
  5596. .cmd = NL80211_CMD_DEL_KEY,
  5597. .doit = nl80211_del_key,
  5598. .policy = nl80211_policy,
  5599. .flags = GENL_ADMIN_PERM,
  5600. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5601. NL80211_FLAG_NEED_RTNL,
  5602. },
  5603. {
  5604. .cmd = NL80211_CMD_SET_BEACON,
  5605. .policy = nl80211_policy,
  5606. .flags = GENL_ADMIN_PERM,
  5607. .doit = nl80211_set_beacon,
  5608. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5609. NL80211_FLAG_NEED_RTNL,
  5610. },
  5611. {
  5612. .cmd = NL80211_CMD_START_AP,
  5613. .policy = nl80211_policy,
  5614. .flags = GENL_ADMIN_PERM,
  5615. .doit = nl80211_start_ap,
  5616. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5617. NL80211_FLAG_NEED_RTNL,
  5618. },
  5619. {
  5620. .cmd = NL80211_CMD_STOP_AP,
  5621. .policy = nl80211_policy,
  5622. .flags = GENL_ADMIN_PERM,
  5623. .doit = nl80211_stop_ap,
  5624. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5625. NL80211_FLAG_NEED_RTNL,
  5626. },
  5627. {
  5628. .cmd = NL80211_CMD_GET_STATION,
  5629. .doit = nl80211_get_station,
  5630. .dumpit = nl80211_dump_station,
  5631. .policy = nl80211_policy,
  5632. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5633. NL80211_FLAG_NEED_RTNL,
  5634. },
  5635. {
  5636. .cmd = NL80211_CMD_SET_STATION,
  5637. .doit = nl80211_set_station,
  5638. .policy = nl80211_policy,
  5639. .flags = GENL_ADMIN_PERM,
  5640. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5641. NL80211_FLAG_NEED_RTNL,
  5642. },
  5643. {
  5644. .cmd = NL80211_CMD_NEW_STATION,
  5645. .doit = nl80211_new_station,
  5646. .policy = nl80211_policy,
  5647. .flags = GENL_ADMIN_PERM,
  5648. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5649. NL80211_FLAG_NEED_RTNL,
  5650. },
  5651. {
  5652. .cmd = NL80211_CMD_DEL_STATION,
  5653. .doit = nl80211_del_station,
  5654. .policy = nl80211_policy,
  5655. .flags = GENL_ADMIN_PERM,
  5656. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5657. NL80211_FLAG_NEED_RTNL,
  5658. },
  5659. {
  5660. .cmd = NL80211_CMD_GET_MPATH,
  5661. .doit = nl80211_get_mpath,
  5662. .dumpit = nl80211_dump_mpath,
  5663. .policy = nl80211_policy,
  5664. .flags = GENL_ADMIN_PERM,
  5665. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5666. NL80211_FLAG_NEED_RTNL,
  5667. },
  5668. {
  5669. .cmd = NL80211_CMD_SET_MPATH,
  5670. .doit = nl80211_set_mpath,
  5671. .policy = nl80211_policy,
  5672. .flags = GENL_ADMIN_PERM,
  5673. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5674. NL80211_FLAG_NEED_RTNL,
  5675. },
  5676. {
  5677. .cmd = NL80211_CMD_NEW_MPATH,
  5678. .doit = nl80211_new_mpath,
  5679. .policy = nl80211_policy,
  5680. .flags = GENL_ADMIN_PERM,
  5681. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5682. NL80211_FLAG_NEED_RTNL,
  5683. },
  5684. {
  5685. .cmd = NL80211_CMD_DEL_MPATH,
  5686. .doit = nl80211_del_mpath,
  5687. .policy = nl80211_policy,
  5688. .flags = GENL_ADMIN_PERM,
  5689. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5690. NL80211_FLAG_NEED_RTNL,
  5691. },
  5692. {
  5693. .cmd = NL80211_CMD_SET_BSS,
  5694. .doit = nl80211_set_bss,
  5695. .policy = nl80211_policy,
  5696. .flags = GENL_ADMIN_PERM,
  5697. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5698. NL80211_FLAG_NEED_RTNL,
  5699. },
  5700. {
  5701. .cmd = NL80211_CMD_GET_REG,
  5702. .doit = nl80211_get_reg,
  5703. .policy = nl80211_policy,
  5704. /* can be retrieved by unprivileged users */
  5705. },
  5706. {
  5707. .cmd = NL80211_CMD_SET_REG,
  5708. .doit = nl80211_set_reg,
  5709. .policy = nl80211_policy,
  5710. .flags = GENL_ADMIN_PERM,
  5711. },
  5712. {
  5713. .cmd = NL80211_CMD_REQ_SET_REG,
  5714. .doit = nl80211_req_set_reg,
  5715. .policy = nl80211_policy,
  5716. .flags = GENL_ADMIN_PERM,
  5717. },
  5718. {
  5719. .cmd = NL80211_CMD_GET_MESH_CONFIG,
  5720. .doit = nl80211_get_mesh_config,
  5721. .policy = nl80211_policy,
  5722. /* can be retrieved by unprivileged users */
  5723. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5724. NL80211_FLAG_NEED_RTNL,
  5725. },
  5726. {
  5727. .cmd = NL80211_CMD_SET_MESH_CONFIG,
  5728. .doit = nl80211_update_mesh_config,
  5729. .policy = nl80211_policy,
  5730. .flags = GENL_ADMIN_PERM,
  5731. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5732. NL80211_FLAG_NEED_RTNL,
  5733. },
  5734. {
  5735. .cmd = NL80211_CMD_TRIGGER_SCAN,
  5736. .doit = nl80211_trigger_scan,
  5737. .policy = nl80211_policy,
  5738. .flags = GENL_ADMIN_PERM,
  5739. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5740. NL80211_FLAG_NEED_RTNL,
  5741. },
  5742. {
  5743. .cmd = NL80211_CMD_GET_SCAN,
  5744. .policy = nl80211_policy,
  5745. .dumpit = nl80211_dump_scan,
  5746. },
  5747. {
  5748. .cmd = NL80211_CMD_START_SCHED_SCAN,
  5749. .doit = nl80211_start_sched_scan,
  5750. .policy = nl80211_policy,
  5751. .flags = GENL_ADMIN_PERM,
  5752. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5753. NL80211_FLAG_NEED_RTNL,
  5754. },
  5755. {
  5756. .cmd = NL80211_CMD_STOP_SCHED_SCAN,
  5757. .doit = nl80211_stop_sched_scan,
  5758. .policy = nl80211_policy,
  5759. .flags = GENL_ADMIN_PERM,
  5760. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5761. NL80211_FLAG_NEED_RTNL,
  5762. },
  5763. {
  5764. .cmd = NL80211_CMD_AUTHENTICATE,
  5765. .doit = nl80211_authenticate,
  5766. .policy = nl80211_policy,
  5767. .flags = GENL_ADMIN_PERM,
  5768. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5769. NL80211_FLAG_NEED_RTNL,
  5770. },
  5771. {
  5772. .cmd = NL80211_CMD_ASSOCIATE,
  5773. .doit = nl80211_associate,
  5774. .policy = nl80211_policy,
  5775. .flags = GENL_ADMIN_PERM,
  5776. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5777. NL80211_FLAG_NEED_RTNL,
  5778. },
  5779. {
  5780. .cmd = NL80211_CMD_DEAUTHENTICATE,
  5781. .doit = nl80211_deauthenticate,
  5782. .policy = nl80211_policy,
  5783. .flags = GENL_ADMIN_PERM,
  5784. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5785. NL80211_FLAG_NEED_RTNL,
  5786. },
  5787. {
  5788. .cmd = NL80211_CMD_DISASSOCIATE,
  5789. .doit = nl80211_disassociate,
  5790. .policy = nl80211_policy,
  5791. .flags = GENL_ADMIN_PERM,
  5792. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5793. NL80211_FLAG_NEED_RTNL,
  5794. },
  5795. {
  5796. .cmd = NL80211_CMD_JOIN_IBSS,
  5797. .doit = nl80211_join_ibss,
  5798. .policy = nl80211_policy,
  5799. .flags = GENL_ADMIN_PERM,
  5800. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5801. NL80211_FLAG_NEED_RTNL,
  5802. },
  5803. {
  5804. .cmd = NL80211_CMD_LEAVE_IBSS,
  5805. .doit = nl80211_leave_ibss,
  5806. .policy = nl80211_policy,
  5807. .flags = GENL_ADMIN_PERM,
  5808. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5809. NL80211_FLAG_NEED_RTNL,
  5810. },
  5811. #ifdef CONFIG_NL80211_TESTMODE
  5812. {
  5813. .cmd = NL80211_CMD_TESTMODE,
  5814. .doit = nl80211_testmode_do,
  5815. .dumpit = nl80211_testmode_dump,
  5816. .policy = nl80211_policy,
  5817. .flags = GENL_ADMIN_PERM,
  5818. .internal_flags = NL80211_FLAG_NEED_WIPHY |
  5819. NL80211_FLAG_NEED_RTNL,
  5820. },
  5821. #endif
  5822. {
  5823. .cmd = NL80211_CMD_CONNECT,
  5824. .doit = nl80211_connect,
  5825. .policy = nl80211_policy,
  5826. .flags = GENL_ADMIN_PERM,
  5827. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5828. NL80211_FLAG_NEED_RTNL,
  5829. },
  5830. {
  5831. .cmd = NL80211_CMD_DISCONNECT,
  5832. .doit = nl80211_disconnect,
  5833. .policy = nl80211_policy,
  5834. .flags = GENL_ADMIN_PERM,
  5835. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5836. NL80211_FLAG_NEED_RTNL,
  5837. },
  5838. {
  5839. .cmd = NL80211_CMD_SET_WIPHY_NETNS,
  5840. .doit = nl80211_wiphy_netns,
  5841. .policy = nl80211_policy,
  5842. .flags = GENL_ADMIN_PERM,
  5843. .internal_flags = NL80211_FLAG_NEED_WIPHY |
  5844. NL80211_FLAG_NEED_RTNL,
  5845. },
  5846. {
  5847. .cmd = NL80211_CMD_GET_SURVEY,
  5848. .policy = nl80211_policy,
  5849. .dumpit = nl80211_dump_survey,
  5850. },
  5851. {
  5852. .cmd = NL80211_CMD_SET_PMKSA,
  5853. .doit = nl80211_setdel_pmksa,
  5854. .policy = nl80211_policy,
  5855. .flags = GENL_ADMIN_PERM,
  5856. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5857. NL80211_FLAG_NEED_RTNL,
  5858. },
  5859. {
  5860. .cmd = NL80211_CMD_DEL_PMKSA,
  5861. .doit = nl80211_setdel_pmksa,
  5862. .policy = nl80211_policy,
  5863. .flags = GENL_ADMIN_PERM,
  5864. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5865. NL80211_FLAG_NEED_RTNL,
  5866. },
  5867. {
  5868. .cmd = NL80211_CMD_FLUSH_PMKSA,
  5869. .doit = nl80211_flush_pmksa,
  5870. .policy = nl80211_policy,
  5871. .flags = GENL_ADMIN_PERM,
  5872. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5873. NL80211_FLAG_NEED_RTNL,
  5874. },
  5875. {
  5876. .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
  5877. .doit = nl80211_remain_on_channel,
  5878. .policy = nl80211_policy,
  5879. .flags = GENL_ADMIN_PERM,
  5880. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5881. NL80211_FLAG_NEED_RTNL,
  5882. },
  5883. {
  5884. .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
  5885. .doit = nl80211_cancel_remain_on_channel,
  5886. .policy = nl80211_policy,
  5887. .flags = GENL_ADMIN_PERM,
  5888. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5889. NL80211_FLAG_NEED_RTNL,
  5890. },
  5891. {
  5892. .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
  5893. .doit = nl80211_set_tx_bitrate_mask,
  5894. .policy = nl80211_policy,
  5895. .flags = GENL_ADMIN_PERM,
  5896. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5897. NL80211_FLAG_NEED_RTNL,
  5898. },
  5899. {
  5900. .cmd = NL80211_CMD_REGISTER_FRAME,
  5901. .doit = nl80211_register_mgmt,
  5902. .policy = nl80211_policy,
  5903. .flags = GENL_ADMIN_PERM,
  5904. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5905. NL80211_FLAG_NEED_RTNL,
  5906. },
  5907. {
  5908. .cmd = NL80211_CMD_FRAME,
  5909. .doit = nl80211_tx_mgmt,
  5910. .policy = nl80211_policy,
  5911. .flags = GENL_ADMIN_PERM,
  5912. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5913. NL80211_FLAG_NEED_RTNL,
  5914. },
  5915. {
  5916. .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
  5917. .doit = nl80211_tx_mgmt_cancel_wait,
  5918. .policy = nl80211_policy,
  5919. .flags = GENL_ADMIN_PERM,
  5920. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5921. NL80211_FLAG_NEED_RTNL,
  5922. },
  5923. {
  5924. .cmd = NL80211_CMD_SET_POWER_SAVE,
  5925. .doit = nl80211_set_power_save,
  5926. .policy = nl80211_policy,
  5927. .flags = GENL_ADMIN_PERM,
  5928. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5929. NL80211_FLAG_NEED_RTNL,
  5930. },
  5931. {
  5932. .cmd = NL80211_CMD_GET_POWER_SAVE,
  5933. .doit = nl80211_get_power_save,
  5934. .policy = nl80211_policy,
  5935. /* can be retrieved by unprivileged users */
  5936. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5937. NL80211_FLAG_NEED_RTNL,
  5938. },
  5939. {
  5940. .cmd = NL80211_CMD_SET_CQM,
  5941. .doit = nl80211_set_cqm,
  5942. .policy = nl80211_policy,
  5943. .flags = GENL_ADMIN_PERM,
  5944. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5945. NL80211_FLAG_NEED_RTNL,
  5946. },
  5947. {
  5948. .cmd = NL80211_CMD_SET_CHANNEL,
  5949. .doit = nl80211_set_channel,
  5950. .policy = nl80211_policy,
  5951. .flags = GENL_ADMIN_PERM,
  5952. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5953. NL80211_FLAG_NEED_RTNL,
  5954. },
  5955. {
  5956. .cmd = NL80211_CMD_SET_WDS_PEER,
  5957. .doit = nl80211_set_wds_peer,
  5958. .policy = nl80211_policy,
  5959. .flags = GENL_ADMIN_PERM,
  5960. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  5961. NL80211_FLAG_NEED_RTNL,
  5962. },
  5963. {
  5964. .cmd = NL80211_CMD_JOIN_MESH,
  5965. .doit = nl80211_join_mesh,
  5966. .policy = nl80211_policy,
  5967. .flags = GENL_ADMIN_PERM,
  5968. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5969. NL80211_FLAG_NEED_RTNL,
  5970. },
  5971. {
  5972. .cmd = NL80211_CMD_LEAVE_MESH,
  5973. .doit = nl80211_leave_mesh,
  5974. .policy = nl80211_policy,
  5975. .flags = GENL_ADMIN_PERM,
  5976. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  5977. NL80211_FLAG_NEED_RTNL,
  5978. },
  5979. {
  5980. .cmd = NL80211_CMD_GET_WOWLAN,
  5981. .doit = nl80211_get_wowlan,
  5982. .policy = nl80211_policy,
  5983. /* can be retrieved by unprivileged users */
  5984. .internal_flags = NL80211_FLAG_NEED_WIPHY |
  5985. NL80211_FLAG_NEED_RTNL,
  5986. },
  5987. {
  5988. .cmd = NL80211_CMD_SET_WOWLAN,
  5989. .doit = nl80211_set_wowlan,
  5990. .policy = nl80211_policy,
  5991. .flags = GENL_ADMIN_PERM,
  5992. .internal_flags = NL80211_FLAG_NEED_WIPHY |
  5993. NL80211_FLAG_NEED_RTNL,
  5994. },
  5995. {
  5996. .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
  5997. .doit = nl80211_set_rekey_data,
  5998. .policy = nl80211_policy,
  5999. .flags = GENL_ADMIN_PERM,
  6000. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  6001. NL80211_FLAG_NEED_RTNL,
  6002. },
  6003. {
  6004. .cmd = NL80211_CMD_TDLS_MGMT,
  6005. .doit = nl80211_tdls_mgmt,
  6006. .policy = nl80211_policy,
  6007. .flags = GENL_ADMIN_PERM,
  6008. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  6009. NL80211_FLAG_NEED_RTNL,
  6010. },
  6011. {
  6012. .cmd = NL80211_CMD_TDLS_OPER,
  6013. .doit = nl80211_tdls_oper,
  6014. .policy = nl80211_policy,
  6015. .flags = GENL_ADMIN_PERM,
  6016. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  6017. NL80211_FLAG_NEED_RTNL,
  6018. },
  6019. {
  6020. .cmd = NL80211_CMD_UNEXPECTED_FRAME,
  6021. .doit = nl80211_register_unexpected_frame,
  6022. .policy = nl80211_policy,
  6023. .flags = GENL_ADMIN_PERM,
  6024. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  6025. NL80211_FLAG_NEED_RTNL,
  6026. },
  6027. {
  6028. .cmd = NL80211_CMD_PROBE_CLIENT,
  6029. .doit = nl80211_probe_client,
  6030. .policy = nl80211_policy,
  6031. .flags = GENL_ADMIN_PERM,
  6032. .internal_flags = NL80211_FLAG_NEED_NETDEV_UP |
  6033. NL80211_FLAG_NEED_RTNL,
  6034. },
  6035. {
  6036. .cmd = NL80211_CMD_REGISTER_BEACONS,
  6037. .doit = nl80211_register_beacons,
  6038. .policy = nl80211_policy,
  6039. .flags = GENL_ADMIN_PERM,
  6040. .internal_flags = NL80211_FLAG_NEED_WIPHY |
  6041. NL80211_FLAG_NEED_RTNL,
  6042. },
  6043. {
  6044. .cmd = NL80211_CMD_SET_NOACK_MAP,
  6045. .doit = nl80211_set_noack_map,
  6046. .policy = nl80211_policy,
  6047. .flags = GENL_ADMIN_PERM,
  6048. .internal_flags = NL80211_FLAG_NEED_NETDEV |
  6049. NL80211_FLAG_NEED_RTNL,
  6050. },
  6051. };
  6052. static struct genl_multicast_group nl80211_mlme_mcgrp = {
  6053. .name = "mlme",
  6054. };
  6055. /* multicast groups */
  6056. static struct genl_multicast_group nl80211_config_mcgrp = {
  6057. .name = "config",
  6058. };
  6059. static struct genl_multicast_group nl80211_scan_mcgrp = {
  6060. .name = "scan",
  6061. };
  6062. static struct genl_multicast_group nl80211_regulatory_mcgrp = {
  6063. .name = "regulatory",
  6064. };
  6065. /* notification functions */
  6066. void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev)
  6067. {
  6068. struct sk_buff *msg;
  6069. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  6070. if (!msg)
  6071. return;
  6072. if (nl80211_send_wiphy(msg, 0, 0, 0, rdev) < 0) {
  6073. nlmsg_free(msg);
  6074. return;
  6075. }
  6076. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6077. nl80211_config_mcgrp.id, GFP_KERNEL);
  6078. }
  6079. static int nl80211_add_scan_req(struct sk_buff *msg,
  6080. struct cfg80211_registered_device *rdev)
  6081. {
  6082. struct cfg80211_scan_request *req = rdev->scan_req;
  6083. struct nlattr *nest;
  6084. int i;
  6085. ASSERT_RDEV_LOCK(rdev);
  6086. if (WARN_ON(!req))
  6087. return 0;
  6088. nest = nla_nest_start(msg, NL80211_ATTR_SCAN_SSIDS);
  6089. if (!nest)
  6090. goto nla_put_failure;
  6091. for (i = 0; i < req->n_ssids; i++) {
  6092. if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
  6093. goto nla_put_failure;
  6094. }
  6095. nla_nest_end(msg, nest);
  6096. nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQUENCIES);
  6097. if (!nest)
  6098. goto nla_put_failure;
  6099. for (i = 0; i < req->n_channels; i++) {
  6100. if (nla_put_u32(msg, i, req->channels[i]->center_freq))
  6101. goto nla_put_failure;
  6102. }
  6103. nla_nest_end(msg, nest);
  6104. if (req->ie &&
  6105. nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
  6106. goto nla_put_failure;
  6107. return 0;
  6108. nla_put_failure:
  6109. return -ENOBUFS;
  6110. }
  6111. static int nl80211_send_scan_msg(struct sk_buff *msg,
  6112. struct cfg80211_registered_device *rdev,
  6113. struct net_device *netdev,
  6114. u32 pid, u32 seq, int flags,
  6115. u32 cmd)
  6116. {
  6117. void *hdr;
  6118. hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
  6119. if (!hdr)
  6120. return -1;
  6121. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6122. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
  6123. goto nla_put_failure;
  6124. /* ignore errors and send incomplete event anyway */
  6125. nl80211_add_scan_req(msg, rdev);
  6126. return genlmsg_end(msg, hdr);
  6127. nla_put_failure:
  6128. genlmsg_cancel(msg, hdr);
  6129. return -EMSGSIZE;
  6130. }
  6131. static int
  6132. nl80211_send_sched_scan_msg(struct sk_buff *msg,
  6133. struct cfg80211_registered_device *rdev,
  6134. struct net_device *netdev,
  6135. u32 pid, u32 seq, int flags, u32 cmd)
  6136. {
  6137. void *hdr;
  6138. hdr = nl80211hdr_put(msg, pid, seq, flags, cmd);
  6139. if (!hdr)
  6140. return -1;
  6141. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6142. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
  6143. goto nla_put_failure;
  6144. return genlmsg_end(msg, hdr);
  6145. nla_put_failure:
  6146. genlmsg_cancel(msg, hdr);
  6147. return -EMSGSIZE;
  6148. }
  6149. void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
  6150. struct net_device *netdev)
  6151. {
  6152. struct sk_buff *msg;
  6153. msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
  6154. if (!msg)
  6155. return;
  6156. if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
  6157. NL80211_CMD_TRIGGER_SCAN) < 0) {
  6158. nlmsg_free(msg);
  6159. return;
  6160. }
  6161. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6162. nl80211_scan_mcgrp.id, GFP_KERNEL);
  6163. }
  6164. void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
  6165. struct net_device *netdev)
  6166. {
  6167. struct sk_buff *msg;
  6168. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  6169. if (!msg)
  6170. return;
  6171. if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
  6172. NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
  6173. nlmsg_free(msg);
  6174. return;
  6175. }
  6176. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6177. nl80211_scan_mcgrp.id, GFP_KERNEL);
  6178. }
  6179. void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
  6180. struct net_device *netdev)
  6181. {
  6182. struct sk_buff *msg;
  6183. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  6184. if (!msg)
  6185. return;
  6186. if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
  6187. NL80211_CMD_SCAN_ABORTED) < 0) {
  6188. nlmsg_free(msg);
  6189. return;
  6190. }
  6191. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6192. nl80211_scan_mcgrp.id, GFP_KERNEL);
  6193. }
  6194. void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
  6195. struct net_device *netdev)
  6196. {
  6197. struct sk_buff *msg;
  6198. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  6199. if (!msg)
  6200. return;
  6201. if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0,
  6202. NL80211_CMD_SCHED_SCAN_RESULTS) < 0) {
  6203. nlmsg_free(msg);
  6204. return;
  6205. }
  6206. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6207. nl80211_scan_mcgrp.id, GFP_KERNEL);
  6208. }
  6209. void nl80211_send_sched_scan(struct cfg80211_registered_device *rdev,
  6210. struct net_device *netdev, u32 cmd)
  6211. {
  6212. struct sk_buff *msg;
  6213. msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
  6214. if (!msg)
  6215. return;
  6216. if (nl80211_send_sched_scan_msg(msg, rdev, netdev, 0, 0, 0, cmd) < 0) {
  6217. nlmsg_free(msg);
  6218. return;
  6219. }
  6220. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6221. nl80211_scan_mcgrp.id, GFP_KERNEL);
  6222. }
  6223. /*
  6224. * This can happen on global regulatory changes or device specific settings
  6225. * based on custom world regulatory domains.
  6226. */
  6227. void nl80211_send_reg_change_event(struct regulatory_request *request)
  6228. {
  6229. struct sk_buff *msg;
  6230. void *hdr;
  6231. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
  6232. if (!msg)
  6233. return;
  6234. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_CHANGE);
  6235. if (!hdr) {
  6236. nlmsg_free(msg);
  6237. return;
  6238. }
  6239. /* Userspace can always count this one always being set */
  6240. if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
  6241. goto nla_put_failure;
  6242. if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
  6243. if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
  6244. NL80211_REGDOM_TYPE_WORLD))
  6245. goto nla_put_failure;
  6246. } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
  6247. if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
  6248. NL80211_REGDOM_TYPE_CUSTOM_WORLD))
  6249. goto nla_put_failure;
  6250. } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
  6251. request->intersect) {
  6252. if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
  6253. NL80211_REGDOM_TYPE_INTERSECTION))
  6254. goto nla_put_failure;
  6255. } else {
  6256. if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
  6257. NL80211_REGDOM_TYPE_COUNTRY) ||
  6258. nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
  6259. request->alpha2))
  6260. goto nla_put_failure;
  6261. }
  6262. if (wiphy_idx_valid(request->wiphy_idx) &&
  6263. nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
  6264. goto nla_put_failure;
  6265. genlmsg_end(msg, hdr);
  6266. rcu_read_lock();
  6267. genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
  6268. GFP_ATOMIC);
  6269. rcu_read_unlock();
  6270. return;
  6271. nla_put_failure:
  6272. genlmsg_cancel(msg, hdr);
  6273. nlmsg_free(msg);
  6274. }
  6275. static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
  6276. struct net_device *netdev,
  6277. const u8 *buf, size_t len,
  6278. enum nl80211_commands cmd, gfp_t gfp)
  6279. {
  6280. struct sk_buff *msg;
  6281. void *hdr;
  6282. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6283. if (!msg)
  6284. return;
  6285. hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
  6286. if (!hdr) {
  6287. nlmsg_free(msg);
  6288. return;
  6289. }
  6290. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6291. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6292. nla_put(msg, NL80211_ATTR_FRAME, len, buf))
  6293. goto nla_put_failure;
  6294. genlmsg_end(msg, hdr);
  6295. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6296. nl80211_mlme_mcgrp.id, gfp);
  6297. return;
  6298. nla_put_failure:
  6299. genlmsg_cancel(msg, hdr);
  6300. nlmsg_free(msg);
  6301. }
  6302. void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
  6303. struct net_device *netdev, const u8 *buf,
  6304. size_t len, gfp_t gfp)
  6305. {
  6306. nl80211_send_mlme_event(rdev, netdev, buf, len,
  6307. NL80211_CMD_AUTHENTICATE, gfp);
  6308. }
  6309. void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
  6310. struct net_device *netdev, const u8 *buf,
  6311. size_t len, gfp_t gfp)
  6312. {
  6313. nl80211_send_mlme_event(rdev, netdev, buf, len,
  6314. NL80211_CMD_ASSOCIATE, gfp);
  6315. }
  6316. void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
  6317. struct net_device *netdev, const u8 *buf,
  6318. size_t len, gfp_t gfp)
  6319. {
  6320. nl80211_send_mlme_event(rdev, netdev, buf, len,
  6321. NL80211_CMD_DEAUTHENTICATE, gfp);
  6322. }
  6323. void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
  6324. struct net_device *netdev, const u8 *buf,
  6325. size_t len, gfp_t gfp)
  6326. {
  6327. nl80211_send_mlme_event(rdev, netdev, buf, len,
  6328. NL80211_CMD_DISASSOCIATE, gfp);
  6329. }
  6330. void nl80211_send_unprot_deauth(struct cfg80211_registered_device *rdev,
  6331. struct net_device *netdev, const u8 *buf,
  6332. size_t len, gfp_t gfp)
  6333. {
  6334. nl80211_send_mlme_event(rdev, netdev, buf, len,
  6335. NL80211_CMD_UNPROT_DEAUTHENTICATE, gfp);
  6336. }
  6337. void nl80211_send_unprot_disassoc(struct cfg80211_registered_device *rdev,
  6338. struct net_device *netdev, const u8 *buf,
  6339. size_t len, gfp_t gfp)
  6340. {
  6341. nl80211_send_mlme_event(rdev, netdev, buf, len,
  6342. NL80211_CMD_UNPROT_DISASSOCIATE, gfp);
  6343. }
  6344. static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
  6345. struct net_device *netdev, int cmd,
  6346. const u8 *addr, gfp_t gfp)
  6347. {
  6348. struct sk_buff *msg;
  6349. void *hdr;
  6350. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6351. if (!msg)
  6352. return;
  6353. hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
  6354. if (!hdr) {
  6355. nlmsg_free(msg);
  6356. return;
  6357. }
  6358. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6359. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6360. nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
  6361. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
  6362. goto nla_put_failure;
  6363. genlmsg_end(msg, hdr);
  6364. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6365. nl80211_mlme_mcgrp.id, gfp);
  6366. return;
  6367. nla_put_failure:
  6368. genlmsg_cancel(msg, hdr);
  6369. nlmsg_free(msg);
  6370. }
  6371. void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
  6372. struct net_device *netdev, const u8 *addr,
  6373. gfp_t gfp)
  6374. {
  6375. nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
  6376. addr, gfp);
  6377. }
  6378. void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
  6379. struct net_device *netdev, const u8 *addr,
  6380. gfp_t gfp)
  6381. {
  6382. nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
  6383. addr, gfp);
  6384. }
  6385. void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
  6386. struct net_device *netdev, const u8 *bssid,
  6387. const u8 *req_ie, size_t req_ie_len,
  6388. const u8 *resp_ie, size_t resp_ie_len,
  6389. u16 status, gfp_t gfp)
  6390. {
  6391. struct sk_buff *msg;
  6392. void *hdr;
  6393. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6394. if (!msg)
  6395. return;
  6396. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
  6397. if (!hdr) {
  6398. nlmsg_free(msg);
  6399. return;
  6400. }
  6401. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6402. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6403. (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid)) ||
  6404. nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status) ||
  6405. (req_ie &&
  6406. nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
  6407. (resp_ie &&
  6408. nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
  6409. goto nla_put_failure;
  6410. genlmsg_end(msg, hdr);
  6411. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6412. nl80211_mlme_mcgrp.id, gfp);
  6413. return;
  6414. nla_put_failure:
  6415. genlmsg_cancel(msg, hdr);
  6416. nlmsg_free(msg);
  6417. }
  6418. void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
  6419. struct net_device *netdev, const u8 *bssid,
  6420. const u8 *req_ie, size_t req_ie_len,
  6421. const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp)
  6422. {
  6423. struct sk_buff *msg;
  6424. void *hdr;
  6425. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6426. if (!msg)
  6427. return;
  6428. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
  6429. if (!hdr) {
  6430. nlmsg_free(msg);
  6431. return;
  6432. }
  6433. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6434. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6435. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid) ||
  6436. (req_ie &&
  6437. nla_put(msg, NL80211_ATTR_REQ_IE, req_ie_len, req_ie)) ||
  6438. (resp_ie &&
  6439. nla_put(msg, NL80211_ATTR_RESP_IE, resp_ie_len, resp_ie)))
  6440. goto nla_put_failure;
  6441. genlmsg_end(msg, hdr);
  6442. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6443. nl80211_mlme_mcgrp.id, gfp);
  6444. return;
  6445. nla_put_failure:
  6446. genlmsg_cancel(msg, hdr);
  6447. nlmsg_free(msg);
  6448. }
  6449. void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
  6450. struct net_device *netdev, u16 reason,
  6451. const u8 *ie, size_t ie_len, bool from_ap)
  6452. {
  6453. struct sk_buff *msg;
  6454. void *hdr;
  6455. msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
  6456. if (!msg)
  6457. return;
  6458. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
  6459. if (!hdr) {
  6460. nlmsg_free(msg);
  6461. return;
  6462. }
  6463. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6464. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6465. (from_ap && reason &&
  6466. nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
  6467. (from_ap &&
  6468. nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
  6469. (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
  6470. goto nla_put_failure;
  6471. genlmsg_end(msg, hdr);
  6472. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6473. nl80211_mlme_mcgrp.id, GFP_KERNEL);
  6474. return;
  6475. nla_put_failure:
  6476. genlmsg_cancel(msg, hdr);
  6477. nlmsg_free(msg);
  6478. }
  6479. void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
  6480. struct net_device *netdev, const u8 *bssid,
  6481. gfp_t gfp)
  6482. {
  6483. struct sk_buff *msg;
  6484. void *hdr;
  6485. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6486. if (!msg)
  6487. return;
  6488. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
  6489. if (!hdr) {
  6490. nlmsg_free(msg);
  6491. return;
  6492. }
  6493. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6494. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6495. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
  6496. goto nla_put_failure;
  6497. genlmsg_end(msg, hdr);
  6498. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6499. nl80211_mlme_mcgrp.id, gfp);
  6500. return;
  6501. nla_put_failure:
  6502. genlmsg_cancel(msg, hdr);
  6503. nlmsg_free(msg);
  6504. }
  6505. void nl80211_send_new_peer_candidate(struct cfg80211_registered_device *rdev,
  6506. struct net_device *netdev,
  6507. const u8 *macaddr, const u8* ie, u8 ie_len,
  6508. gfp_t gfp)
  6509. {
  6510. struct sk_buff *msg;
  6511. void *hdr;
  6512. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6513. if (!msg)
  6514. return;
  6515. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
  6516. if (!hdr) {
  6517. nlmsg_free(msg);
  6518. return;
  6519. }
  6520. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6521. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6522. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, macaddr) ||
  6523. (ie_len && ie &&
  6524. nla_put(msg, NL80211_ATTR_IE, ie_len , ie)))
  6525. goto nla_put_failure;
  6526. genlmsg_end(msg, hdr);
  6527. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6528. nl80211_mlme_mcgrp.id, gfp);
  6529. return;
  6530. nla_put_failure:
  6531. genlmsg_cancel(msg, hdr);
  6532. nlmsg_free(msg);
  6533. }
  6534. void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
  6535. struct net_device *netdev, const u8 *addr,
  6536. enum nl80211_key_type key_type, int key_id,
  6537. const u8 *tsc, gfp_t gfp)
  6538. {
  6539. struct sk_buff *msg;
  6540. void *hdr;
  6541. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6542. if (!msg)
  6543. return;
  6544. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
  6545. if (!hdr) {
  6546. nlmsg_free(msg);
  6547. return;
  6548. }
  6549. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6550. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6551. (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
  6552. nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
  6553. (key_id != -1 &&
  6554. nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
  6555. (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
  6556. goto nla_put_failure;
  6557. genlmsg_end(msg, hdr);
  6558. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6559. nl80211_mlme_mcgrp.id, gfp);
  6560. return;
  6561. nla_put_failure:
  6562. genlmsg_cancel(msg, hdr);
  6563. nlmsg_free(msg);
  6564. }
  6565. void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
  6566. struct ieee80211_channel *channel_before,
  6567. struct ieee80211_channel *channel_after)
  6568. {
  6569. struct sk_buff *msg;
  6570. void *hdr;
  6571. struct nlattr *nl_freq;
  6572. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
  6573. if (!msg)
  6574. return;
  6575. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
  6576. if (!hdr) {
  6577. nlmsg_free(msg);
  6578. return;
  6579. }
  6580. /*
  6581. * Since we are applying the beacon hint to a wiphy we know its
  6582. * wiphy_idx is valid
  6583. */
  6584. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
  6585. goto nla_put_failure;
  6586. /* Before */
  6587. nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
  6588. if (!nl_freq)
  6589. goto nla_put_failure;
  6590. if (nl80211_msg_put_channel(msg, channel_before))
  6591. goto nla_put_failure;
  6592. nla_nest_end(msg, nl_freq);
  6593. /* After */
  6594. nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
  6595. if (!nl_freq)
  6596. goto nla_put_failure;
  6597. if (nl80211_msg_put_channel(msg, channel_after))
  6598. goto nla_put_failure;
  6599. nla_nest_end(msg, nl_freq);
  6600. genlmsg_end(msg, hdr);
  6601. rcu_read_lock();
  6602. genlmsg_multicast_allns(msg, 0, nl80211_regulatory_mcgrp.id,
  6603. GFP_ATOMIC);
  6604. rcu_read_unlock();
  6605. return;
  6606. nla_put_failure:
  6607. genlmsg_cancel(msg, hdr);
  6608. nlmsg_free(msg);
  6609. }
  6610. static void nl80211_send_remain_on_chan_event(
  6611. int cmd, struct cfg80211_registered_device *rdev,
  6612. struct net_device *netdev, u64 cookie,
  6613. struct ieee80211_channel *chan,
  6614. enum nl80211_channel_type channel_type,
  6615. unsigned int duration, gfp_t gfp)
  6616. {
  6617. struct sk_buff *msg;
  6618. void *hdr;
  6619. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6620. if (!msg)
  6621. return;
  6622. hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
  6623. if (!hdr) {
  6624. nlmsg_free(msg);
  6625. return;
  6626. }
  6627. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6628. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6629. nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
  6630. nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type) ||
  6631. nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie))
  6632. goto nla_put_failure;
  6633. if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
  6634. nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
  6635. goto nla_put_failure;
  6636. genlmsg_end(msg, hdr);
  6637. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6638. nl80211_mlme_mcgrp.id, gfp);
  6639. return;
  6640. nla_put_failure:
  6641. genlmsg_cancel(msg, hdr);
  6642. nlmsg_free(msg);
  6643. }
  6644. void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
  6645. struct net_device *netdev, u64 cookie,
  6646. struct ieee80211_channel *chan,
  6647. enum nl80211_channel_type channel_type,
  6648. unsigned int duration, gfp_t gfp)
  6649. {
  6650. nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
  6651. rdev, netdev, cookie, chan,
  6652. channel_type, duration, gfp);
  6653. }
  6654. void nl80211_send_remain_on_channel_cancel(
  6655. struct cfg80211_registered_device *rdev, struct net_device *netdev,
  6656. u64 cookie, struct ieee80211_channel *chan,
  6657. enum nl80211_channel_type channel_type, gfp_t gfp)
  6658. {
  6659. nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
  6660. rdev, netdev, cookie, chan,
  6661. channel_type, 0, gfp);
  6662. }
  6663. void nl80211_send_sta_event(struct cfg80211_registered_device *rdev,
  6664. struct net_device *dev, const u8 *mac_addr,
  6665. struct station_info *sinfo, gfp_t gfp)
  6666. {
  6667. struct sk_buff *msg;
  6668. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6669. if (!msg)
  6670. return;
  6671. if (nl80211_send_station(msg, 0, 0, 0,
  6672. rdev, dev, mac_addr, sinfo) < 0) {
  6673. nlmsg_free(msg);
  6674. return;
  6675. }
  6676. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6677. nl80211_mlme_mcgrp.id, gfp);
  6678. }
  6679. void nl80211_send_sta_del_event(struct cfg80211_registered_device *rdev,
  6680. struct net_device *dev, const u8 *mac_addr,
  6681. gfp_t gfp)
  6682. {
  6683. struct sk_buff *msg;
  6684. void *hdr;
  6685. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6686. if (!msg)
  6687. return;
  6688. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_STATION);
  6689. if (!hdr) {
  6690. nlmsg_free(msg);
  6691. return;
  6692. }
  6693. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  6694. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
  6695. goto nla_put_failure;
  6696. genlmsg_end(msg, hdr);
  6697. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6698. nl80211_mlme_mcgrp.id, gfp);
  6699. return;
  6700. nla_put_failure:
  6701. genlmsg_cancel(msg, hdr);
  6702. nlmsg_free(msg);
  6703. }
  6704. static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
  6705. const u8 *addr, gfp_t gfp)
  6706. {
  6707. struct wireless_dev *wdev = dev->ieee80211_ptr;
  6708. struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  6709. struct sk_buff *msg;
  6710. void *hdr;
  6711. int err;
  6712. u32 nlpid = ACCESS_ONCE(wdev->ap_unexpected_nlpid);
  6713. if (!nlpid)
  6714. return false;
  6715. msg = nlmsg_new(100, gfp);
  6716. if (!msg)
  6717. return true;
  6718. hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
  6719. if (!hdr) {
  6720. nlmsg_free(msg);
  6721. return true;
  6722. }
  6723. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6724. nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  6725. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
  6726. goto nla_put_failure;
  6727. err = genlmsg_end(msg, hdr);
  6728. if (err < 0) {
  6729. nlmsg_free(msg);
  6730. return true;
  6731. }
  6732. genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
  6733. return true;
  6734. nla_put_failure:
  6735. genlmsg_cancel(msg, hdr);
  6736. nlmsg_free(msg);
  6737. return true;
  6738. }
  6739. bool nl80211_unexpected_frame(struct net_device *dev, const u8 *addr, gfp_t gfp)
  6740. {
  6741. return __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
  6742. addr, gfp);
  6743. }
  6744. bool nl80211_unexpected_4addr_frame(struct net_device *dev,
  6745. const u8 *addr, gfp_t gfp)
  6746. {
  6747. return __nl80211_unexpected_frame(dev,
  6748. NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
  6749. addr, gfp);
  6750. }
  6751. int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
  6752. struct net_device *netdev, u32 nlpid,
  6753. int freq, int sig_dbm,
  6754. const u8 *buf, size_t len, gfp_t gfp)
  6755. {
  6756. struct sk_buff *msg;
  6757. void *hdr;
  6758. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6759. if (!msg)
  6760. return -ENOMEM;
  6761. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
  6762. if (!hdr) {
  6763. nlmsg_free(msg);
  6764. return -ENOMEM;
  6765. }
  6766. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6767. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6768. nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
  6769. (sig_dbm &&
  6770. nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
  6771. nla_put(msg, NL80211_ATTR_FRAME, len, buf))
  6772. goto nla_put_failure;
  6773. genlmsg_end(msg, hdr);
  6774. return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
  6775. nla_put_failure:
  6776. genlmsg_cancel(msg, hdr);
  6777. nlmsg_free(msg);
  6778. return -ENOBUFS;
  6779. }
  6780. void nl80211_send_mgmt_tx_status(struct cfg80211_registered_device *rdev,
  6781. struct net_device *netdev, u64 cookie,
  6782. const u8 *buf, size_t len, bool ack,
  6783. gfp_t gfp)
  6784. {
  6785. struct sk_buff *msg;
  6786. void *hdr;
  6787. msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  6788. if (!msg)
  6789. return;
  6790. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME_TX_STATUS);
  6791. if (!hdr) {
  6792. nlmsg_free(msg);
  6793. return;
  6794. }
  6795. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6796. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6797. nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
  6798. nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
  6799. (ack && nla_put_flag(msg, NL80211_ATTR_ACK)))
  6800. goto nla_put_failure;
  6801. genlmsg_end(msg, hdr);
  6802. genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
  6803. return;
  6804. nla_put_failure:
  6805. genlmsg_cancel(msg, hdr);
  6806. nlmsg_free(msg);
  6807. }
  6808. void
  6809. nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
  6810. struct net_device *netdev,
  6811. enum nl80211_cqm_rssi_threshold_event rssi_event,
  6812. gfp_t gfp)
  6813. {
  6814. struct sk_buff *msg;
  6815. struct nlattr *pinfoattr;
  6816. void *hdr;
  6817. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6818. if (!msg)
  6819. return;
  6820. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
  6821. if (!hdr) {
  6822. nlmsg_free(msg);
  6823. return;
  6824. }
  6825. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6826. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
  6827. goto nla_put_failure;
  6828. pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
  6829. if (!pinfoattr)
  6830. goto nla_put_failure;
  6831. if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
  6832. rssi_event))
  6833. goto nla_put_failure;
  6834. nla_nest_end(msg, pinfoattr);
  6835. genlmsg_end(msg, hdr);
  6836. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6837. nl80211_mlme_mcgrp.id, gfp);
  6838. return;
  6839. nla_put_failure:
  6840. genlmsg_cancel(msg, hdr);
  6841. nlmsg_free(msg);
  6842. }
  6843. void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
  6844. struct net_device *netdev, const u8 *bssid,
  6845. const u8 *replay_ctr, gfp_t gfp)
  6846. {
  6847. struct sk_buff *msg;
  6848. struct nlattr *rekey_attr;
  6849. void *hdr;
  6850. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6851. if (!msg)
  6852. return;
  6853. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
  6854. if (!hdr) {
  6855. nlmsg_free(msg);
  6856. return;
  6857. }
  6858. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6859. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6860. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
  6861. goto nla_put_failure;
  6862. rekey_attr = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA);
  6863. if (!rekey_attr)
  6864. goto nla_put_failure;
  6865. if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
  6866. NL80211_REPLAY_CTR_LEN, replay_ctr))
  6867. goto nla_put_failure;
  6868. nla_nest_end(msg, rekey_attr);
  6869. genlmsg_end(msg, hdr);
  6870. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6871. nl80211_mlme_mcgrp.id, gfp);
  6872. return;
  6873. nla_put_failure:
  6874. genlmsg_cancel(msg, hdr);
  6875. nlmsg_free(msg);
  6876. }
  6877. void nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
  6878. struct net_device *netdev, int index,
  6879. const u8 *bssid, bool preauth, gfp_t gfp)
  6880. {
  6881. struct sk_buff *msg;
  6882. struct nlattr *attr;
  6883. void *hdr;
  6884. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6885. if (!msg)
  6886. return;
  6887. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
  6888. if (!hdr) {
  6889. nlmsg_free(msg);
  6890. return;
  6891. }
  6892. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6893. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
  6894. goto nla_put_failure;
  6895. attr = nla_nest_start(msg, NL80211_ATTR_PMKSA_CANDIDATE);
  6896. if (!attr)
  6897. goto nla_put_failure;
  6898. if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
  6899. nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
  6900. (preauth &&
  6901. nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
  6902. goto nla_put_failure;
  6903. nla_nest_end(msg, attr);
  6904. genlmsg_end(msg, hdr);
  6905. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6906. nl80211_mlme_mcgrp.id, gfp);
  6907. return;
  6908. nla_put_failure:
  6909. genlmsg_cancel(msg, hdr);
  6910. nlmsg_free(msg);
  6911. }
  6912. void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
  6913. struct net_device *netdev, int freq,
  6914. enum nl80211_channel_type type, gfp_t gfp)
  6915. {
  6916. struct sk_buff *msg;
  6917. void *hdr;
  6918. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6919. if (!msg)
  6920. return;
  6921. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CH_SWITCH_NOTIFY);
  6922. if (!hdr) {
  6923. nlmsg_free(msg);
  6924. return;
  6925. }
  6926. if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6927. nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
  6928. nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, type))
  6929. goto nla_put_failure;
  6930. genlmsg_end(msg, hdr);
  6931. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6932. nl80211_mlme_mcgrp.id, gfp);
  6933. return;
  6934. nla_put_failure:
  6935. genlmsg_cancel(msg, hdr);
  6936. nlmsg_free(msg);
  6937. }
  6938. void
  6939. nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
  6940. struct net_device *netdev, const u8 *peer,
  6941. u32 num_packets, gfp_t gfp)
  6942. {
  6943. struct sk_buff *msg;
  6944. struct nlattr *pinfoattr;
  6945. void *hdr;
  6946. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6947. if (!msg)
  6948. return;
  6949. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
  6950. if (!hdr) {
  6951. nlmsg_free(msg);
  6952. return;
  6953. }
  6954. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6955. nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
  6956. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
  6957. goto nla_put_failure;
  6958. pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
  6959. if (!pinfoattr)
  6960. goto nla_put_failure;
  6961. if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
  6962. goto nla_put_failure;
  6963. nla_nest_end(msg, pinfoattr);
  6964. genlmsg_end(msg, hdr);
  6965. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  6966. nl80211_mlme_mcgrp.id, gfp);
  6967. return;
  6968. nla_put_failure:
  6969. genlmsg_cancel(msg, hdr);
  6970. nlmsg_free(msg);
  6971. }
  6972. void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
  6973. u64 cookie, bool acked, gfp_t gfp)
  6974. {
  6975. struct wireless_dev *wdev = dev->ieee80211_ptr;
  6976. struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
  6977. struct sk_buff *msg;
  6978. void *hdr;
  6979. int err;
  6980. msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
  6981. if (!msg)
  6982. return;
  6983. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
  6984. if (!hdr) {
  6985. nlmsg_free(msg);
  6986. return;
  6987. }
  6988. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  6989. nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  6990. nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
  6991. nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie) ||
  6992. (acked && nla_put_flag(msg, NL80211_ATTR_ACK)))
  6993. goto nla_put_failure;
  6994. err = genlmsg_end(msg, hdr);
  6995. if (err < 0) {
  6996. nlmsg_free(msg);
  6997. return;
  6998. }
  6999. genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
  7000. nl80211_mlme_mcgrp.id, gfp);
  7001. return;
  7002. nla_put_failure:
  7003. genlmsg_cancel(msg, hdr);
  7004. nlmsg_free(msg);
  7005. }
  7006. EXPORT_SYMBOL(cfg80211_probe_status);
  7007. void cfg80211_report_obss_beacon(struct wiphy *wiphy,
  7008. const u8 *frame, size_t len,
  7009. int freq, int sig_dbm, gfp_t gfp)
  7010. {
  7011. struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
  7012. struct sk_buff *msg;
  7013. void *hdr;
  7014. u32 nlpid = ACCESS_ONCE(rdev->ap_beacons_nlpid);
  7015. if (!nlpid)
  7016. return;
  7017. msg = nlmsg_new(len + 100, gfp);
  7018. if (!msg)
  7019. return;
  7020. hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
  7021. if (!hdr) {
  7022. nlmsg_free(msg);
  7023. return;
  7024. }
  7025. if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  7026. (freq &&
  7027. nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
  7028. (sig_dbm &&
  7029. nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
  7030. nla_put(msg, NL80211_ATTR_FRAME, len, frame))
  7031. goto nla_put_failure;
  7032. genlmsg_end(msg, hdr);
  7033. genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
  7034. return;
  7035. nla_put_failure:
  7036. genlmsg_cancel(msg, hdr);
  7037. nlmsg_free(msg);
  7038. }
  7039. EXPORT_SYMBOL(cfg80211_report_obss_beacon);
  7040. static int nl80211_netlink_notify(struct notifier_block * nb,
  7041. unsigned long state,
  7042. void *_notify)
  7043. {
  7044. struct netlink_notify *notify = _notify;
  7045. struct cfg80211_registered_device *rdev;
  7046. struct wireless_dev *wdev;
  7047. if (state != NETLINK_URELEASE)
  7048. return NOTIFY_DONE;
  7049. rcu_read_lock();
  7050. list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
  7051. list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
  7052. cfg80211_mlme_unregister_socket(wdev, notify->pid);
  7053. if (rdev->ap_beacons_nlpid == notify->pid)
  7054. rdev->ap_beacons_nlpid = 0;
  7055. }
  7056. rcu_read_unlock();
  7057. return NOTIFY_DONE;
  7058. }
  7059. static struct notifier_block nl80211_netlink_notifier = {
  7060. .notifier_call = nl80211_netlink_notify,
  7061. };
  7062. /* initialisation/exit functions */
  7063. int nl80211_init(void)
  7064. {
  7065. int err;
  7066. err = genl_register_family_with_ops(&nl80211_fam,
  7067. nl80211_ops, ARRAY_SIZE(nl80211_ops));
  7068. if (err)
  7069. return err;
  7070. err = genl_register_mc_group(&nl80211_fam, &nl80211_config_mcgrp);
  7071. if (err)
  7072. goto err_out;
  7073. err = genl_register_mc_group(&nl80211_fam, &nl80211_scan_mcgrp);
  7074. if (err)
  7075. goto err_out;
  7076. err = genl_register_mc_group(&nl80211_fam, &nl80211_regulatory_mcgrp);
  7077. if (err)
  7078. goto err_out;
  7079. err = genl_register_mc_group(&nl80211_fam, &nl80211_mlme_mcgrp);
  7080. if (err)
  7081. goto err_out;
  7082. #ifdef CONFIG_NL80211_TESTMODE
  7083. err = genl_register_mc_group(&nl80211_fam, &nl80211_testmode_mcgrp);
  7084. if (err)
  7085. goto err_out;
  7086. #endif
  7087. err = netlink_register_notifier(&nl80211_netlink_notifier);
  7088. if (err)
  7089. goto err_out;
  7090. return 0;
  7091. err_out:
  7092. genl_unregister_family(&nl80211_fam);
  7093. return err;
  7094. }
  7095. void nl80211_exit(void)
  7096. {
  7097. netlink_unregister_notifier(&nl80211_netlink_notifier);
  7098. genl_unregister_family(&nl80211_fam);
  7099. }