1 /* 2 * This is the new netlink-based wireless configuration interface. 3 * 4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> 5 * Copyright 2013-2014 Intel Mobile Communications GmbH 6 * Copyright 2015-2016 Intel Deutschland GmbH 7 */ 8 9 #include <linux/if.h> 10 #include <linux/module.h> 11 #include <linux/err.h> 12 #include <linux/slab.h> 13 #include <linux/list.h> 14 #include <linux/if_ether.h> 15 #include <linux/ieee80211.h> 16 #include <linux/nl80211.h> 17 #include <linux/rtnetlink.h> 18 #include <linux/netlink.h> 19 #include <linux/etherdevice.h> 20 #include <net/net_namespace.h> 21 #include <net/genetlink.h> 22 #include <net/cfg80211.h> 23 #include <net/sock.h> 24 #include <net/inet_connection_sock.h> 25 #include "core.h" 26 #include "nl80211.h" 27 #include "reg.h" 28 #include "rdev-ops.h" 29 30 static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev, 31 struct genl_info *info, 32 struct cfg80211_crypto_settings *settings, 33 int cipher_limit); 34 35 static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb, 36 struct genl_info *info); 37 static void nl80211_post_doit(const struct genl_ops *ops, struct sk_buff *skb, 38 struct genl_info *info); 39 40 /* the netlink family */ 41 static struct genl_family nl80211_fam = { 42 .id = GENL_ID_GENERATE, /* don't bother with a hardcoded ID */ 43 .name = NL80211_GENL_NAME, /* have users key off the name instead */ 44 .hdrsize = 0, /* no private header */ 45 .version = 1, /* no particular meaning now */ 46 .maxattr = NL80211_ATTR_MAX, 47 .netnsok = true, 48 .pre_doit = nl80211_pre_doit, 49 .post_doit = nl80211_post_doit, 50 }; 51 52 /* multicast groups */ 53 enum nl80211_multicast_groups { 54 NL80211_MCGRP_CONFIG, 55 NL80211_MCGRP_SCAN, 56 NL80211_MCGRP_REGULATORY, 57 NL80211_MCGRP_MLME, 58 NL80211_MCGRP_VENDOR, 59 NL80211_MCGRP_TESTMODE /* keep last - ifdef! */ 60 }; 61 62 static const struct genl_multicast_group nl80211_mcgrps[] = { 63 [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG }, 64 [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN }, 65 [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG }, 66 [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME }, 67 [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR }, 68 #ifdef CONFIG_NL80211_TESTMODE 69 [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE } 70 #endif 71 }; 72 73 /* returns ERR_PTR values */ 74 static struct wireless_dev * 75 __cfg80211_wdev_from_attrs(struct net *netns, struct nlattr **attrs) 76 { 77 struct cfg80211_registered_device *rdev; 78 struct wireless_dev *result = NULL; 79 bool have_ifidx = attrs[NL80211_ATTR_IFINDEX]; 80 bool have_wdev_id = attrs[NL80211_ATTR_WDEV]; 81 u64 wdev_id; 82 int wiphy_idx = -1; 83 int ifidx = -1; 84 85 ASSERT_RTNL(); 86 87 if (!have_ifidx && !have_wdev_id) 88 return ERR_PTR(-EINVAL); 89 90 if (have_ifidx) 91 ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]); 92 if (have_wdev_id) { 93 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]); 94 wiphy_idx = wdev_id >> 32; 95 } 96 97 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 98 struct wireless_dev *wdev; 99 100 if (wiphy_net(&rdev->wiphy) != netns) 101 continue; 102 103 if (have_wdev_id && rdev->wiphy_idx != wiphy_idx) 104 continue; 105 106 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 107 if (have_ifidx && wdev->netdev && 108 wdev->netdev->ifindex == ifidx) { 109 result = wdev; 110 break; 111 } 112 if (have_wdev_id && wdev->identifier == (u32)wdev_id) { 113 result = wdev; 114 break; 115 } 116 } 117 118 if (result) 119 break; 120 } 121 122 if (result) 123 return result; 124 return ERR_PTR(-ENODEV); 125 } 126 127 static struct cfg80211_registered_device * 128 __cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs) 129 { 130 struct cfg80211_registered_device *rdev = NULL, *tmp; 131 struct net_device *netdev; 132 133 ASSERT_RTNL(); 134 135 if (!attrs[NL80211_ATTR_WIPHY] && 136 !attrs[NL80211_ATTR_IFINDEX] && 137 !attrs[NL80211_ATTR_WDEV]) 138 return ERR_PTR(-EINVAL); 139 140 if (attrs[NL80211_ATTR_WIPHY]) 141 rdev = cfg80211_rdev_by_wiphy_idx( 142 nla_get_u32(attrs[NL80211_ATTR_WIPHY])); 143 144 if (attrs[NL80211_ATTR_WDEV]) { 145 u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]); 146 struct wireless_dev *wdev; 147 bool found = false; 148 149 tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32); 150 if (tmp) { 151 /* make sure wdev exists */ 152 list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) { 153 if (wdev->identifier != (u32)wdev_id) 154 continue; 155 found = true; 156 break; 157 } 158 159 if (!found) 160 tmp = NULL; 161 162 if (rdev && tmp != rdev) 163 return ERR_PTR(-EINVAL); 164 rdev = tmp; 165 } 166 } 167 168 if (attrs[NL80211_ATTR_IFINDEX]) { 169 int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]); 170 171 netdev = __dev_get_by_index(netns, ifindex); 172 if (netdev) { 173 if (netdev->ieee80211_ptr) 174 tmp = wiphy_to_rdev( 175 netdev->ieee80211_ptr->wiphy); 176 else 177 tmp = NULL; 178 179 /* not wireless device -- return error */ 180 if (!tmp) 181 return ERR_PTR(-EINVAL); 182 183 /* mismatch -- return error */ 184 if (rdev && tmp != rdev) 185 return ERR_PTR(-EINVAL); 186 187 rdev = tmp; 188 } 189 } 190 191 if (!rdev) 192 return ERR_PTR(-ENODEV); 193 194 if (netns != wiphy_net(&rdev->wiphy)) 195 return ERR_PTR(-ENODEV); 196 197 return rdev; 198 } 199 200 /* 201 * This function returns a pointer to the driver 202 * that the genl_info item that is passed refers to. 203 * 204 * The result of this can be a PTR_ERR and hence must 205 * be checked with IS_ERR() for errors. 206 */ 207 static struct cfg80211_registered_device * 208 cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info) 209 { 210 return __cfg80211_rdev_from_attrs(netns, info->attrs); 211 } 212 213 /* policy for the attributes */ 214 static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { 215 [NL80211_ATTR_WIPHY] = { .type = NLA_U32 }, 216 [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING, 217 .len = 20-1 }, 218 [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED }, 219 220 [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 }, 221 [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 }, 222 [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 }, 223 [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 }, 224 [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 }, 225 226 [NL80211_ATTR_WIPHY_RETRY_SHORT] = { .type = NLA_U8 }, 227 [NL80211_ATTR_WIPHY_RETRY_LONG] = { .type = NLA_U8 }, 228 [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 }, 229 [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 }, 230 [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 }, 231 [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG }, 232 233 [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 }, 234 [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 }, 235 [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 }, 236 237 [NL80211_ATTR_MAC] = { .len = ETH_ALEN }, 238 [NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN }, 239 240 [NL80211_ATTR_KEY] = { .type = NLA_NESTED, }, 241 [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY, 242 .len = WLAN_MAX_KEY_LEN }, 243 [NL80211_ATTR_KEY_IDX] = { .type = NLA_U8 }, 244 [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 }, 245 [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG }, 246 [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 }, 247 [NL80211_ATTR_KEY_TYPE] = { .type = NLA_U32 }, 248 249 [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 }, 250 [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 }, 251 [NL80211_ATTR_BEACON_HEAD] = { .type = NLA_BINARY, 252 .len = IEEE80211_MAX_DATA_LEN }, 253 [NL80211_ATTR_BEACON_TAIL] = { .type = NLA_BINARY, 254 .len = IEEE80211_MAX_DATA_LEN }, 255 [NL80211_ATTR_STA_AID] = { .type = NLA_U16 }, 256 [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED }, 257 [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 }, 258 [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY, 259 .len = NL80211_MAX_SUPP_RATES }, 260 [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 }, 261 [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 }, 262 [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ }, 263 [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, 264 .len = IEEE80211_MAX_MESH_ID_LEN }, 265 [NL80211_ATTR_MPATH_NEXT_HOP] = { .type = NLA_U32 }, 266 267 [NL80211_ATTR_REG_ALPHA2] = { .type = NLA_STRING, .len = 2 }, 268 [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED }, 269 270 [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 }, 271 [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 }, 272 [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 }, 273 [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY, 274 .len = NL80211_MAX_SUPP_RATES }, 275 [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 }, 276 277 [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED }, 278 [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG }, 279 280 [NL80211_ATTR_HT_CAPABILITY] = { .len = NL80211_HT_CAPABILITY_LEN }, 281 282 [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 }, 283 [NL80211_ATTR_IE] = { .type = NLA_BINARY, 284 .len = IEEE80211_MAX_DATA_LEN }, 285 [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED }, 286 [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED }, 287 288 [NL80211_ATTR_SSID] = { .type = NLA_BINARY, 289 .len = IEEE80211_MAX_SSID_LEN }, 290 [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 }, 291 [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 }, 292 [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG }, 293 [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG }, 294 [NL80211_ATTR_USE_MFP] = { .type = NLA_U32 }, 295 [NL80211_ATTR_STA_FLAGS2] = { 296 .len = sizeof(struct nl80211_sta_flag_update), 297 }, 298 [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG }, 299 [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 }, 300 [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG }, 301 [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG }, 302 [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 }, 303 [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 }, 304 [NL80211_ATTR_PID] = { .type = NLA_U32 }, 305 [NL80211_ATTR_4ADDR] = { .type = NLA_U8 }, 306 [NL80211_ATTR_PMKID] = { .type = NLA_BINARY, 307 .len = WLAN_PMKID_LEN }, 308 [NL80211_ATTR_DURATION] = { .type = NLA_U32 }, 309 [NL80211_ATTR_COOKIE] = { .type = NLA_U64 }, 310 [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED }, 311 [NL80211_ATTR_FRAME] = { .type = NLA_BINARY, 312 .len = IEEE80211_MAX_DATA_LEN }, 313 [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, }, 314 [NL80211_ATTR_PS_STATE] = { .type = NLA_U32 }, 315 [NL80211_ATTR_CQM] = { .type = NLA_NESTED, }, 316 [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG }, 317 [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 }, 318 [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 }, 319 [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 }, 320 [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 }, 321 [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 }, 322 [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 }, 323 [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 }, 324 [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG }, 325 [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED }, 326 [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED }, 327 [NL80211_ATTR_STA_PLINK_STATE] = { .type = NLA_U8 }, 328 [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 }, 329 [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED }, 330 [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED }, 331 [NL80211_ATTR_HIDDEN_SSID] = { .type = NLA_U32 }, 332 [NL80211_ATTR_IE_PROBE_RESP] = { .type = NLA_BINARY, 333 .len = IEEE80211_MAX_DATA_LEN }, 334 [NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY, 335 .len = IEEE80211_MAX_DATA_LEN }, 336 [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG }, 337 [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED }, 338 [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG }, 339 [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 }, 340 [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 }, 341 [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 }, 342 [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG }, 343 [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG }, 344 [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG }, 345 [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG }, 346 [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY, 347 .len = IEEE80211_MAX_DATA_LEN }, 348 [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 }, 349 [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG }, 350 [NL80211_ATTR_HT_CAPABILITY_MASK] = { 351 .len = NL80211_HT_CAPABILITY_LEN 352 }, 353 [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 }, 354 [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 }, 355 [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 }, 356 [NL80211_ATTR_WDEV] = { .type = NLA_U64 }, 357 [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 }, 358 [NL80211_ATTR_SAE_DATA] = { .type = NLA_BINARY, }, 359 [NL80211_ATTR_VHT_CAPABILITY] = { .len = NL80211_VHT_CAPABILITY_LEN }, 360 [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 }, 361 [NL80211_ATTR_P2P_CTWINDOW] = { .type = NLA_U8 }, 362 [NL80211_ATTR_P2P_OPPPS] = { .type = NLA_U8 }, 363 [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 }, 364 [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED }, 365 [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 }, 366 [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, }, 367 [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, }, 368 [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG }, 369 [NL80211_ATTR_VHT_CAPABILITY_MASK] = { 370 .len = NL80211_VHT_CAPABILITY_LEN, 371 }, 372 [NL80211_ATTR_MDID] = { .type = NLA_U16 }, 373 [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY, 374 .len = IEEE80211_MAX_DATA_LEN }, 375 [NL80211_ATTR_PEER_AID] = { .type = NLA_U16 }, 376 [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 }, 377 [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG }, 378 [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED }, 379 [NL80211_ATTR_CSA_C_OFF_BEACON] = { .type = NLA_BINARY }, 380 [NL80211_ATTR_CSA_C_OFF_PRESP] = { .type = NLA_BINARY }, 381 [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY }, 382 [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY }, 383 [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG }, 384 [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 }, 385 [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 }, 386 [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 }, 387 [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY }, 388 [NL80211_ATTR_QOS_MAP] = { .type = NLA_BINARY, 389 .len = IEEE80211_QOS_MAP_LEN_MAX }, 390 [NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN }, 391 [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 }, 392 [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 }, 393 [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG }, 394 [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY }, 395 [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG }, 396 [NL80211_ATTR_TSID] = { .type = NLA_U8 }, 397 [NL80211_ATTR_USER_PRIO] = { .type = NLA_U8 }, 398 [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 }, 399 [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 }, 400 [NL80211_ATTR_MAC_MASK] = { .len = ETH_ALEN }, 401 [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG }, 402 [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 }, 403 [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 }, 404 [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG }, 405 [NL80211_ATTR_PBSS] = { .type = NLA_FLAG }, 406 [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED }, 407 [NL80211_ATTR_STA_SUPPORT_P2P_PS] = { .type = NLA_U8 }, 408 [NL80211_ATTR_MU_MIMO_GROUP_DATA] = { 409 .len = VHT_MUMIMO_GROUPS_DATA_LEN 410 }, 411 [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = { .len = ETH_ALEN }, 412 }; 413 414 /* policy for the key attributes */ 415 static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = { 416 [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN }, 417 [NL80211_KEY_IDX] = { .type = NLA_U8 }, 418 [NL80211_KEY_CIPHER] = { .type = NLA_U32 }, 419 [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 }, 420 [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG }, 421 [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG }, 422 [NL80211_KEY_TYPE] = { .type = NLA_U32 }, 423 [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED }, 424 }; 425 426 /* policy for the key default flags */ 427 static const struct nla_policy 428 nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = { 429 [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG }, 430 [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG }, 431 }; 432 433 /* policy for WoWLAN attributes */ 434 static const struct nla_policy 435 nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = { 436 [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG }, 437 [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG }, 438 [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG }, 439 [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED }, 440 [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG }, 441 [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG }, 442 [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG }, 443 [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG }, 444 [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED }, 445 [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED }, 446 }; 447 448 static const struct nla_policy 449 nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = { 450 [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 }, 451 [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 }, 452 [NL80211_WOWLAN_TCP_DST_MAC] = { .len = ETH_ALEN }, 453 [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 }, 454 [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 }, 455 [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = { .len = 1 }, 456 [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = { 457 .len = sizeof(struct nl80211_wowlan_tcp_data_seq) 458 }, 459 [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = { 460 .len = sizeof(struct nl80211_wowlan_tcp_data_token) 461 }, 462 [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 }, 463 [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = { .len = 1 }, 464 [NL80211_WOWLAN_TCP_WAKE_MASK] = { .len = 1 }, 465 }; 466 467 /* policy for coalesce rule attributes */ 468 static const struct nla_policy 469 nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = { 470 [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 }, 471 [NL80211_ATTR_COALESCE_RULE_CONDITION] = { .type = NLA_U32 }, 472 [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED }, 473 }; 474 475 /* policy for GTK rekey offload attributes */ 476 static const struct nla_policy 477 nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = { 478 [NL80211_REKEY_DATA_KEK] = { .len = NL80211_KEK_LEN }, 479 [NL80211_REKEY_DATA_KCK] = { .len = NL80211_KCK_LEN }, 480 [NL80211_REKEY_DATA_REPLAY_CTR] = { .len = NL80211_REPLAY_CTR_LEN }, 481 }; 482 483 static const struct nla_policy 484 nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = { 485 [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY, 486 .len = IEEE80211_MAX_SSID_LEN }, 487 [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 }, 488 }; 489 490 static const struct nla_policy 491 nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = { 492 [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 }, 493 [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 }, 494 }; 495 496 static const struct nla_policy 497 nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = { 498 [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG }, 499 [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 }, 500 [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = { 501 .len = sizeof(struct nl80211_bss_select_rssi_adjust) 502 }, 503 }; 504 505 static int nl80211_prepare_wdev_dump(struct sk_buff *skb, 506 struct netlink_callback *cb, 507 struct cfg80211_registered_device **rdev, 508 struct wireless_dev **wdev) 509 { 510 int err; 511 512 rtnl_lock(); 513 514 if (!cb->args[0]) { 515 err = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, 516 nl80211_fam.attrbuf, nl80211_fam.maxattr, 517 nl80211_policy); 518 if (err) 519 goto out_unlock; 520 521 *wdev = __cfg80211_wdev_from_attrs(sock_net(skb->sk), 522 nl80211_fam.attrbuf); 523 if (IS_ERR(*wdev)) { 524 err = PTR_ERR(*wdev); 525 goto out_unlock; 526 } 527 *rdev = wiphy_to_rdev((*wdev)->wiphy); 528 /* 0 is the first index - add 1 to parse only once */ 529 cb->args[0] = (*rdev)->wiphy_idx + 1; 530 cb->args[1] = (*wdev)->identifier; 531 } else { 532 /* subtract the 1 again here */ 533 struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1); 534 struct wireless_dev *tmp; 535 536 if (!wiphy) { 537 err = -ENODEV; 538 goto out_unlock; 539 } 540 *rdev = wiphy_to_rdev(wiphy); 541 *wdev = NULL; 542 543 list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) { 544 if (tmp->identifier == cb->args[1]) { 545 *wdev = tmp; 546 break; 547 } 548 } 549 550 if (!*wdev) { 551 err = -ENODEV; 552 goto out_unlock; 553 } 554 } 555 556 return 0; 557 out_unlock: 558 rtnl_unlock(); 559 return err; 560 } 561 562 static void nl80211_finish_wdev_dump(struct cfg80211_registered_device *rdev) 563 { 564 rtnl_unlock(); 565 } 566 567 /* IE validation */ 568 static bool is_valid_ie_attr(const struct nlattr *attr) 569 { 570 const u8 *pos; 571 int len; 572 573 if (!attr) 574 return true; 575 576 pos = nla_data(attr); 577 len = nla_len(attr); 578 579 while (len) { 580 u8 elemlen; 581 582 if (len < 2) 583 return false; 584 len -= 2; 585 586 elemlen = pos[1]; 587 if (elemlen > len) 588 return false; 589 590 len -= elemlen; 591 pos += 2 + elemlen; 592 } 593 594 return true; 595 } 596 597 /* message building helper */ 598 static inline void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq, 599 int flags, u8 cmd) 600 { 601 /* since there is no private header just add the generic one */ 602 return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd); 603 } 604 605 static int nl80211_msg_put_channel(struct sk_buff *msg, 606 struct ieee80211_channel *chan, 607 bool large) 608 { 609 /* Some channels must be completely excluded from the 610 * list to protect old user-space tools from breaking 611 */ 612 if (!large && chan->flags & 613 (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ)) 614 return 0; 615 616 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ, 617 chan->center_freq)) 618 goto nla_put_failure; 619 620 if ((chan->flags & IEEE80211_CHAN_DISABLED) && 621 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED)) 622 goto nla_put_failure; 623 if (chan->flags & IEEE80211_CHAN_NO_IR) { 624 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR)) 625 goto nla_put_failure; 626 if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS)) 627 goto nla_put_failure; 628 } 629 if (chan->flags & IEEE80211_CHAN_RADAR) { 630 if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR)) 631 goto nla_put_failure; 632 if (large) { 633 u32 time; 634 635 time = elapsed_jiffies_msecs(chan->dfs_state_entered); 636 637 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE, 638 chan->dfs_state)) 639 goto nla_put_failure; 640 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME, 641 time)) 642 goto nla_put_failure; 643 if (nla_put_u32(msg, 644 NL80211_FREQUENCY_ATTR_DFS_CAC_TIME, 645 chan->dfs_cac_ms)) 646 goto nla_put_failure; 647 } 648 } 649 650 if (large) { 651 if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) && 652 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS)) 653 goto nla_put_failure; 654 if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) && 655 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS)) 656 goto nla_put_failure; 657 if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) && 658 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ)) 659 goto nla_put_failure; 660 if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) && 661 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ)) 662 goto nla_put_failure; 663 if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) && 664 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY)) 665 goto nla_put_failure; 666 if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) && 667 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT)) 668 goto nla_put_failure; 669 if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) && 670 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ)) 671 goto nla_put_failure; 672 if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) && 673 nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ)) 674 goto nla_put_failure; 675 } 676 677 if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER, 678 DBM_TO_MBM(chan->max_power))) 679 goto nla_put_failure; 680 681 return 0; 682 683 nla_put_failure: 684 return -ENOBUFS; 685 } 686 687 /* netlink command implementations */ 688 689 struct key_parse { 690 struct key_params p; 691 int idx; 692 int type; 693 bool def, defmgmt; 694 bool def_uni, def_multi; 695 }; 696 697 static int nl80211_parse_key_new(struct nlattr *key, struct key_parse *k) 698 { 699 struct nlattr *tb[NL80211_KEY_MAX + 1]; 700 int err = nla_parse_nested(tb, NL80211_KEY_MAX, key, 701 nl80211_key_policy); 702 if (err) 703 return err; 704 705 k->def = !!tb[NL80211_KEY_DEFAULT]; 706 k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT]; 707 708 if (k->def) { 709 k->def_uni = true; 710 k->def_multi = true; 711 } 712 if (k->defmgmt) 713 k->def_multi = true; 714 715 if (tb[NL80211_KEY_IDX]) 716 k->idx = nla_get_u8(tb[NL80211_KEY_IDX]); 717 718 if (tb[NL80211_KEY_DATA]) { 719 k->p.key = nla_data(tb[NL80211_KEY_DATA]); 720 k->p.key_len = nla_len(tb[NL80211_KEY_DATA]); 721 } 722 723 if (tb[NL80211_KEY_SEQ]) { 724 k->p.seq = nla_data(tb[NL80211_KEY_SEQ]); 725 k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]); 726 } 727 728 if (tb[NL80211_KEY_CIPHER]) 729 k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]); 730 731 if (tb[NL80211_KEY_TYPE]) { 732 k->type = nla_get_u32(tb[NL80211_KEY_TYPE]); 733 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES) 734 return -EINVAL; 735 } 736 737 if (tb[NL80211_KEY_DEFAULT_TYPES]) { 738 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES]; 739 740 err = nla_parse_nested(kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1, 741 tb[NL80211_KEY_DEFAULT_TYPES], 742 nl80211_key_default_policy); 743 if (err) 744 return err; 745 746 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST]; 747 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST]; 748 } 749 750 return 0; 751 } 752 753 static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k) 754 { 755 if (info->attrs[NL80211_ATTR_KEY_DATA]) { 756 k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]); 757 k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]); 758 } 759 760 if (info->attrs[NL80211_ATTR_KEY_SEQ]) { 761 k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]); 762 k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]); 763 } 764 765 if (info->attrs[NL80211_ATTR_KEY_IDX]) 766 k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); 767 768 if (info->attrs[NL80211_ATTR_KEY_CIPHER]) 769 k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]); 770 771 k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT]; 772 k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT]; 773 774 if (k->def) { 775 k->def_uni = true; 776 k->def_multi = true; 777 } 778 if (k->defmgmt) 779 k->def_multi = true; 780 781 if (info->attrs[NL80211_ATTR_KEY_TYPE]) { 782 k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]); 783 if (k->type < 0 || k->type >= NUM_NL80211_KEYTYPES) 784 return -EINVAL; 785 } 786 787 if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) { 788 struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES]; 789 int err = nla_parse_nested( 790 kdt, NUM_NL80211_KEY_DEFAULT_TYPES - 1, 791 info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES], 792 nl80211_key_default_policy); 793 if (err) 794 return err; 795 796 k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST]; 797 k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST]; 798 } 799 800 return 0; 801 } 802 803 static int nl80211_parse_key(struct genl_info *info, struct key_parse *k) 804 { 805 int err; 806 807 memset(k, 0, sizeof(*k)); 808 k->idx = -1; 809 k->type = -1; 810 811 if (info->attrs[NL80211_ATTR_KEY]) 812 err = nl80211_parse_key_new(info->attrs[NL80211_ATTR_KEY], k); 813 else 814 err = nl80211_parse_key_old(info, k); 815 816 if (err) 817 return err; 818 819 if (k->def && k->defmgmt) 820 return -EINVAL; 821 822 if (k->defmgmt) { 823 if (k->def_uni || !k->def_multi) 824 return -EINVAL; 825 } 826 827 if (k->idx != -1) { 828 if (k->defmgmt) { 829 if (k->idx < 4 || k->idx > 5) 830 return -EINVAL; 831 } else if (k->def) { 832 if (k->idx < 0 || k->idx > 3) 833 return -EINVAL; 834 } else { 835 if (k->idx < 0 || k->idx > 5) 836 return -EINVAL; 837 } 838 } 839 840 return 0; 841 } 842 843 static struct cfg80211_cached_keys * 844 nl80211_parse_connkeys(struct cfg80211_registered_device *rdev, 845 struct nlattr *keys, bool *no_ht) 846 { 847 struct key_parse parse; 848 struct nlattr *key; 849 struct cfg80211_cached_keys *result; 850 int rem, err, def = 0; 851 852 result = kzalloc(sizeof(*result), GFP_KERNEL); 853 if (!result) 854 return ERR_PTR(-ENOMEM); 855 856 result->def = -1; 857 result->defmgmt = -1; 858 859 nla_for_each_nested(key, keys, rem) { 860 memset(&parse, 0, sizeof(parse)); 861 parse.idx = -1; 862 863 err = nl80211_parse_key_new(key, &parse); 864 if (err) 865 goto error; 866 err = -EINVAL; 867 if (!parse.p.key) 868 goto error; 869 if (parse.idx < 0 || parse.idx > 4) 870 goto error; 871 if (parse.def) { 872 if (def) 873 goto error; 874 def = 1; 875 result->def = parse.idx; 876 if (!parse.def_uni || !parse.def_multi) 877 goto error; 878 } else if (parse.defmgmt) 879 goto error; 880 err = cfg80211_validate_key_settings(rdev, &parse.p, 881 parse.idx, false, NULL); 882 if (err) 883 goto error; 884 result->params[parse.idx].cipher = parse.p.cipher; 885 result->params[parse.idx].key_len = parse.p.key_len; 886 result->params[parse.idx].key = result->data[parse.idx]; 887 memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len); 888 889 if (parse.p.cipher == WLAN_CIPHER_SUITE_WEP40 || 890 parse.p.cipher == WLAN_CIPHER_SUITE_WEP104) { 891 if (no_ht) 892 *no_ht = true; 893 } 894 } 895 896 return result; 897 error: 898 kfree(result); 899 return ERR_PTR(err); 900 } 901 902 static int nl80211_key_allowed(struct wireless_dev *wdev) 903 { 904 ASSERT_WDEV_LOCK(wdev); 905 906 switch (wdev->iftype) { 907 case NL80211_IFTYPE_AP: 908 case NL80211_IFTYPE_AP_VLAN: 909 case NL80211_IFTYPE_P2P_GO: 910 case NL80211_IFTYPE_MESH_POINT: 911 break; 912 case NL80211_IFTYPE_ADHOC: 913 case NL80211_IFTYPE_STATION: 914 case NL80211_IFTYPE_P2P_CLIENT: 915 if (!wdev->current_bss) 916 return -ENOLINK; 917 break; 918 case NL80211_IFTYPE_UNSPECIFIED: 919 case NL80211_IFTYPE_OCB: 920 case NL80211_IFTYPE_MONITOR: 921 case NL80211_IFTYPE_P2P_DEVICE: 922 case NL80211_IFTYPE_WDS: 923 case NUM_NL80211_IFTYPES: 924 return -EINVAL; 925 } 926 927 return 0; 928 } 929 930 static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy, 931 struct nlattr *tb) 932 { 933 struct ieee80211_channel *chan; 934 935 if (tb == NULL) 936 return NULL; 937 chan = ieee80211_get_channel(wiphy, nla_get_u32(tb)); 938 if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) 939 return NULL; 940 return chan; 941 } 942 943 static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes) 944 { 945 struct nlattr *nl_modes = nla_nest_start(msg, attr); 946 int i; 947 948 if (!nl_modes) 949 goto nla_put_failure; 950 951 i = 0; 952 while (ifmodes) { 953 if ((ifmodes & 1) && nla_put_flag(msg, i)) 954 goto nla_put_failure; 955 ifmodes >>= 1; 956 i++; 957 } 958 959 nla_nest_end(msg, nl_modes); 960 return 0; 961 962 nla_put_failure: 963 return -ENOBUFS; 964 } 965 966 static int nl80211_put_iface_combinations(struct wiphy *wiphy, 967 struct sk_buff *msg, 968 bool large) 969 { 970 struct nlattr *nl_combis; 971 int i, j; 972 973 nl_combis = nla_nest_start(msg, 974 NL80211_ATTR_INTERFACE_COMBINATIONS); 975 if (!nl_combis) 976 goto nla_put_failure; 977 978 for (i = 0; i < wiphy->n_iface_combinations; i++) { 979 const struct ieee80211_iface_combination *c; 980 struct nlattr *nl_combi, *nl_limits; 981 982 c = &wiphy->iface_combinations[i]; 983 984 nl_combi = nla_nest_start(msg, i + 1); 985 if (!nl_combi) 986 goto nla_put_failure; 987 988 nl_limits = nla_nest_start(msg, NL80211_IFACE_COMB_LIMITS); 989 if (!nl_limits) 990 goto nla_put_failure; 991 992 for (j = 0; j < c->n_limits; j++) { 993 struct nlattr *nl_limit; 994 995 nl_limit = nla_nest_start(msg, j + 1); 996 if (!nl_limit) 997 goto nla_put_failure; 998 if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX, 999 c->limits[j].max)) 1000 goto nla_put_failure; 1001 if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES, 1002 c->limits[j].types)) 1003 goto nla_put_failure; 1004 nla_nest_end(msg, nl_limit); 1005 } 1006 1007 nla_nest_end(msg, nl_limits); 1008 1009 if (c->beacon_int_infra_match && 1010 nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH)) 1011 goto nla_put_failure; 1012 if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS, 1013 c->num_different_channels) || 1014 nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM, 1015 c->max_interfaces)) 1016 goto nla_put_failure; 1017 if (large && 1018 (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS, 1019 c->radar_detect_widths) || 1020 nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS, 1021 c->radar_detect_regions))) 1022 goto nla_put_failure; 1023 1024 nla_nest_end(msg, nl_combi); 1025 } 1026 1027 nla_nest_end(msg, nl_combis); 1028 1029 return 0; 1030 nla_put_failure: 1031 return -ENOBUFS; 1032 } 1033 1034 #ifdef CONFIG_PM 1035 static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev, 1036 struct sk_buff *msg) 1037 { 1038 const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp; 1039 struct nlattr *nl_tcp; 1040 1041 if (!tcp) 1042 return 0; 1043 1044 nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION); 1045 if (!nl_tcp) 1046 return -ENOBUFS; 1047 1048 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD, 1049 tcp->data_payload_max)) 1050 return -ENOBUFS; 1051 1052 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD, 1053 tcp->data_payload_max)) 1054 return -ENOBUFS; 1055 1056 if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ)) 1057 return -ENOBUFS; 1058 1059 if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN, 1060 sizeof(*tcp->tok), tcp->tok)) 1061 return -ENOBUFS; 1062 1063 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL, 1064 tcp->data_interval_max)) 1065 return -ENOBUFS; 1066 1067 if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD, 1068 tcp->wake_payload_max)) 1069 return -ENOBUFS; 1070 1071 nla_nest_end(msg, nl_tcp); 1072 return 0; 1073 } 1074 1075 static int nl80211_send_wowlan(struct sk_buff *msg, 1076 struct cfg80211_registered_device *rdev, 1077 bool large) 1078 { 1079 struct nlattr *nl_wowlan; 1080 1081 if (!rdev->wiphy.wowlan) 1082 return 0; 1083 1084 nl_wowlan = nla_nest_start(msg, NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED); 1085 if (!nl_wowlan) 1086 return -ENOBUFS; 1087 1088 if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) && 1089 nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) || 1090 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) && 1091 nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) || 1092 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) && 1093 nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) || 1094 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) && 1095 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) || 1096 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && 1097 nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) || 1098 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) && 1099 nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) || 1100 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) && 1101 nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) || 1102 ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) && 1103 nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))) 1104 return -ENOBUFS; 1105 1106 if (rdev->wiphy.wowlan->n_patterns) { 1107 struct nl80211_pattern_support pat = { 1108 .max_patterns = rdev->wiphy.wowlan->n_patterns, 1109 .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len, 1110 .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len, 1111 .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset, 1112 }; 1113 1114 if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN, 1115 sizeof(pat), &pat)) 1116 return -ENOBUFS; 1117 } 1118 1119 if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) && 1120 nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT, 1121 rdev->wiphy.wowlan->max_nd_match_sets)) 1122 return -ENOBUFS; 1123 1124 if (large && nl80211_send_wowlan_tcp_caps(rdev, msg)) 1125 return -ENOBUFS; 1126 1127 nla_nest_end(msg, nl_wowlan); 1128 1129 return 0; 1130 } 1131 #endif 1132 1133 static int nl80211_send_coalesce(struct sk_buff *msg, 1134 struct cfg80211_registered_device *rdev) 1135 { 1136 struct nl80211_coalesce_rule_support rule; 1137 1138 if (!rdev->wiphy.coalesce) 1139 return 0; 1140 1141 rule.max_rules = rdev->wiphy.coalesce->n_rules; 1142 rule.max_delay = rdev->wiphy.coalesce->max_delay; 1143 rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns; 1144 rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len; 1145 rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len; 1146 rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset; 1147 1148 if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule)) 1149 return -ENOBUFS; 1150 1151 return 0; 1152 } 1153 1154 static int nl80211_send_band_rateinfo(struct sk_buff *msg, 1155 struct ieee80211_supported_band *sband) 1156 { 1157 struct nlattr *nl_rates, *nl_rate; 1158 struct ieee80211_rate *rate; 1159 int i; 1160 1161 /* add HT info */ 1162 if (sband->ht_cap.ht_supported && 1163 (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET, 1164 sizeof(sband->ht_cap.mcs), 1165 &sband->ht_cap.mcs) || 1166 nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA, 1167 sband->ht_cap.cap) || 1168 nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR, 1169 sband->ht_cap.ampdu_factor) || 1170 nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY, 1171 sband->ht_cap.ampdu_density))) 1172 return -ENOBUFS; 1173 1174 /* add VHT info */ 1175 if (sband->vht_cap.vht_supported && 1176 (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET, 1177 sizeof(sband->vht_cap.vht_mcs), 1178 &sband->vht_cap.vht_mcs) || 1179 nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA, 1180 sband->vht_cap.cap))) 1181 return -ENOBUFS; 1182 1183 /* add bitrates */ 1184 nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES); 1185 if (!nl_rates) 1186 return -ENOBUFS; 1187 1188 for (i = 0; i < sband->n_bitrates; i++) { 1189 nl_rate = nla_nest_start(msg, i); 1190 if (!nl_rate) 1191 return -ENOBUFS; 1192 1193 rate = &sband->bitrates[i]; 1194 if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE, 1195 rate->bitrate)) 1196 return -ENOBUFS; 1197 if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) && 1198 nla_put_flag(msg, 1199 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE)) 1200 return -ENOBUFS; 1201 1202 nla_nest_end(msg, nl_rate); 1203 } 1204 1205 nla_nest_end(msg, nl_rates); 1206 1207 return 0; 1208 } 1209 1210 static int 1211 nl80211_send_mgmt_stypes(struct sk_buff *msg, 1212 const struct ieee80211_txrx_stypes *mgmt_stypes) 1213 { 1214 u16 stypes; 1215 struct nlattr *nl_ftypes, *nl_ifs; 1216 enum nl80211_iftype ift; 1217 int i; 1218 1219 if (!mgmt_stypes) 1220 return 0; 1221 1222 nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES); 1223 if (!nl_ifs) 1224 return -ENOBUFS; 1225 1226 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) { 1227 nl_ftypes = nla_nest_start(msg, ift); 1228 if (!nl_ftypes) 1229 return -ENOBUFS; 1230 i = 0; 1231 stypes = mgmt_stypes[ift].tx; 1232 while (stypes) { 1233 if ((stypes & 1) && 1234 nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE, 1235 (i << 4) | IEEE80211_FTYPE_MGMT)) 1236 return -ENOBUFS; 1237 stypes >>= 1; 1238 i++; 1239 } 1240 nla_nest_end(msg, nl_ftypes); 1241 } 1242 1243 nla_nest_end(msg, nl_ifs); 1244 1245 nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES); 1246 if (!nl_ifs) 1247 return -ENOBUFS; 1248 1249 for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) { 1250 nl_ftypes = nla_nest_start(msg, ift); 1251 if (!nl_ftypes) 1252 return -ENOBUFS; 1253 i = 0; 1254 stypes = mgmt_stypes[ift].rx; 1255 while (stypes) { 1256 if ((stypes & 1) && 1257 nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE, 1258 (i << 4) | IEEE80211_FTYPE_MGMT)) 1259 return -ENOBUFS; 1260 stypes >>= 1; 1261 i++; 1262 } 1263 nla_nest_end(msg, nl_ftypes); 1264 } 1265 nla_nest_end(msg, nl_ifs); 1266 1267 return 0; 1268 } 1269 1270 struct nl80211_dump_wiphy_state { 1271 s64 filter_wiphy; 1272 long start; 1273 long split_start, band_start, chan_start, capa_start; 1274 bool split; 1275 }; 1276 1277 static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev, 1278 enum nl80211_commands cmd, 1279 struct sk_buff *msg, u32 portid, u32 seq, 1280 int flags, struct nl80211_dump_wiphy_state *state) 1281 { 1282 void *hdr; 1283 struct nlattr *nl_bands, *nl_band; 1284 struct nlattr *nl_freqs, *nl_freq; 1285 struct nlattr *nl_cmds; 1286 enum nl80211_band band; 1287 struct ieee80211_channel *chan; 1288 int i; 1289 const struct ieee80211_txrx_stypes *mgmt_stypes = 1290 rdev->wiphy.mgmt_stypes; 1291 u32 features; 1292 1293 hdr = nl80211hdr_put(msg, portid, seq, flags, cmd); 1294 if (!hdr) 1295 return -ENOBUFS; 1296 1297 if (WARN_ON(!state)) 1298 return -EINVAL; 1299 1300 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) || 1301 nla_put_string(msg, NL80211_ATTR_WIPHY_NAME, 1302 wiphy_name(&rdev->wiphy)) || 1303 nla_put_u32(msg, NL80211_ATTR_GENERATION, 1304 cfg80211_rdev_list_generation)) 1305 goto nla_put_failure; 1306 1307 if (cmd != NL80211_CMD_NEW_WIPHY) 1308 goto finish; 1309 1310 switch (state->split_start) { 1311 case 0: 1312 if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT, 1313 rdev->wiphy.retry_short) || 1314 nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG, 1315 rdev->wiphy.retry_long) || 1316 nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, 1317 rdev->wiphy.frag_threshold) || 1318 nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, 1319 rdev->wiphy.rts_threshold) || 1320 nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS, 1321 rdev->wiphy.coverage_class) || 1322 nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS, 1323 rdev->wiphy.max_scan_ssids) || 1324 nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS, 1325 rdev->wiphy.max_sched_scan_ssids) || 1326 nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN, 1327 rdev->wiphy.max_scan_ie_len) || 1328 nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN, 1329 rdev->wiphy.max_sched_scan_ie_len) || 1330 nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS, 1331 rdev->wiphy.max_match_sets) || 1332 nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS, 1333 rdev->wiphy.max_sched_scan_plans) || 1334 nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL, 1335 rdev->wiphy.max_sched_scan_plan_interval) || 1336 nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS, 1337 rdev->wiphy.max_sched_scan_plan_iterations)) 1338 goto nla_put_failure; 1339 1340 if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) && 1341 nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN)) 1342 goto nla_put_failure; 1343 if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) && 1344 nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH)) 1345 goto nla_put_failure; 1346 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) && 1347 nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD)) 1348 goto nla_put_failure; 1349 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && 1350 nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT)) 1351 goto nla_put_failure; 1352 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) && 1353 nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT)) 1354 goto nla_put_failure; 1355 if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) && 1356 nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP)) 1357 goto nla_put_failure; 1358 state->split_start++; 1359 if (state->split) 1360 break; 1361 case 1: 1362 if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES, 1363 sizeof(u32) * rdev->wiphy.n_cipher_suites, 1364 rdev->wiphy.cipher_suites)) 1365 goto nla_put_failure; 1366 1367 if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS, 1368 rdev->wiphy.max_num_pmkids)) 1369 goto nla_put_failure; 1370 1371 if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) && 1372 nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE)) 1373 goto nla_put_failure; 1374 1375 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX, 1376 rdev->wiphy.available_antennas_tx) || 1377 nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX, 1378 rdev->wiphy.available_antennas_rx)) 1379 goto nla_put_failure; 1380 1381 if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) && 1382 nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD, 1383 rdev->wiphy.probe_resp_offload)) 1384 goto nla_put_failure; 1385 1386 if ((rdev->wiphy.available_antennas_tx || 1387 rdev->wiphy.available_antennas_rx) && 1388 rdev->ops->get_antenna) { 1389 u32 tx_ant = 0, rx_ant = 0; 1390 int res; 1391 1392 res = rdev_get_antenna(rdev, &tx_ant, &rx_ant); 1393 if (!res) { 1394 if (nla_put_u32(msg, 1395 NL80211_ATTR_WIPHY_ANTENNA_TX, 1396 tx_ant) || 1397 nla_put_u32(msg, 1398 NL80211_ATTR_WIPHY_ANTENNA_RX, 1399 rx_ant)) 1400 goto nla_put_failure; 1401 } 1402 } 1403 1404 state->split_start++; 1405 if (state->split) 1406 break; 1407 case 2: 1408 if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES, 1409 rdev->wiphy.interface_modes)) 1410 goto nla_put_failure; 1411 state->split_start++; 1412 if (state->split) 1413 break; 1414 case 3: 1415 nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS); 1416 if (!nl_bands) 1417 goto nla_put_failure; 1418 1419 for (band = state->band_start; 1420 band < NUM_NL80211_BANDS; band++) { 1421 struct ieee80211_supported_band *sband; 1422 1423 sband = rdev->wiphy.bands[band]; 1424 1425 if (!sband) 1426 continue; 1427 1428 nl_band = nla_nest_start(msg, band); 1429 if (!nl_band) 1430 goto nla_put_failure; 1431 1432 switch (state->chan_start) { 1433 case 0: 1434 if (nl80211_send_band_rateinfo(msg, sband)) 1435 goto nla_put_failure; 1436 state->chan_start++; 1437 if (state->split) 1438 break; 1439 default: 1440 /* add frequencies */ 1441 nl_freqs = nla_nest_start( 1442 msg, NL80211_BAND_ATTR_FREQS); 1443 if (!nl_freqs) 1444 goto nla_put_failure; 1445 1446 for (i = state->chan_start - 1; 1447 i < sband->n_channels; 1448 i++) { 1449 nl_freq = nla_nest_start(msg, i); 1450 if (!nl_freq) 1451 goto nla_put_failure; 1452 1453 chan = &sband->channels[i]; 1454 1455 if (nl80211_msg_put_channel( 1456 msg, chan, 1457 state->split)) 1458 goto nla_put_failure; 1459 1460 nla_nest_end(msg, nl_freq); 1461 if (state->split) 1462 break; 1463 } 1464 if (i < sband->n_channels) 1465 state->chan_start = i + 2; 1466 else 1467 state->chan_start = 0; 1468 nla_nest_end(msg, nl_freqs); 1469 } 1470 1471 nla_nest_end(msg, nl_band); 1472 1473 if (state->split) { 1474 /* start again here */ 1475 if (state->chan_start) 1476 band--; 1477 break; 1478 } 1479 } 1480 nla_nest_end(msg, nl_bands); 1481 1482 if (band < NUM_NL80211_BANDS) 1483 state->band_start = band + 1; 1484 else 1485 state->band_start = 0; 1486 1487 /* if bands & channels are done, continue outside */ 1488 if (state->band_start == 0 && state->chan_start == 0) 1489 state->split_start++; 1490 if (state->split) 1491 break; 1492 case 4: 1493 nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS); 1494 if (!nl_cmds) 1495 goto nla_put_failure; 1496 1497 i = 0; 1498 #define CMD(op, n) \ 1499 do { \ 1500 if (rdev->ops->op) { \ 1501 i++; \ 1502 if (nla_put_u32(msg, i, NL80211_CMD_ ## n)) \ 1503 goto nla_put_failure; \ 1504 } \ 1505 } while (0) 1506 1507 CMD(add_virtual_intf, NEW_INTERFACE); 1508 CMD(change_virtual_intf, SET_INTERFACE); 1509 CMD(add_key, NEW_KEY); 1510 CMD(start_ap, START_AP); 1511 CMD(add_station, NEW_STATION); 1512 CMD(add_mpath, NEW_MPATH); 1513 CMD(update_mesh_config, SET_MESH_CONFIG); 1514 CMD(change_bss, SET_BSS); 1515 CMD(auth, AUTHENTICATE); 1516 CMD(assoc, ASSOCIATE); 1517 CMD(deauth, DEAUTHENTICATE); 1518 CMD(disassoc, DISASSOCIATE); 1519 CMD(join_ibss, JOIN_IBSS); 1520 CMD(join_mesh, JOIN_MESH); 1521 CMD(set_pmksa, SET_PMKSA); 1522 CMD(del_pmksa, DEL_PMKSA); 1523 CMD(flush_pmksa, FLUSH_PMKSA); 1524 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) 1525 CMD(remain_on_channel, REMAIN_ON_CHANNEL); 1526 CMD(set_bitrate_mask, SET_TX_BITRATE_MASK); 1527 CMD(mgmt_tx, FRAME); 1528 CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL); 1529 if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) { 1530 i++; 1531 if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS)) 1532 goto nla_put_failure; 1533 } 1534 if (rdev->ops->set_monitor_channel || rdev->ops->start_ap || 1535 rdev->ops->join_mesh) { 1536 i++; 1537 if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL)) 1538 goto nla_put_failure; 1539 } 1540 CMD(set_wds_peer, SET_WDS_PEER); 1541 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) { 1542 CMD(tdls_mgmt, TDLS_MGMT); 1543 CMD(tdls_oper, TDLS_OPER); 1544 } 1545 if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) 1546 CMD(sched_scan_start, START_SCHED_SCAN); 1547 CMD(probe_client, PROBE_CLIENT); 1548 CMD(set_noack_map, SET_NOACK_MAP); 1549 if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) { 1550 i++; 1551 if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS)) 1552 goto nla_put_failure; 1553 } 1554 CMD(start_p2p_device, START_P2P_DEVICE); 1555 CMD(set_mcast_rate, SET_MCAST_RATE); 1556 #ifdef CONFIG_NL80211_TESTMODE 1557 CMD(testmode_cmd, TESTMODE); 1558 #endif 1559 if (state->split) { 1560 CMD(crit_proto_start, CRIT_PROTOCOL_START); 1561 CMD(crit_proto_stop, CRIT_PROTOCOL_STOP); 1562 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH) 1563 CMD(channel_switch, CHANNEL_SWITCH); 1564 CMD(set_qos_map, SET_QOS_MAP); 1565 if (rdev->wiphy.features & 1566 NL80211_FEATURE_SUPPORTS_WMM_ADMISSION) 1567 CMD(add_tx_ts, ADD_TX_TS); 1568 } 1569 /* add into the if now */ 1570 #undef CMD 1571 1572 if (rdev->ops->connect || rdev->ops->auth) { 1573 i++; 1574 if (nla_put_u32(msg, i, NL80211_CMD_CONNECT)) 1575 goto nla_put_failure; 1576 } 1577 1578 if (rdev->ops->disconnect || rdev->ops->deauth) { 1579 i++; 1580 if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT)) 1581 goto nla_put_failure; 1582 } 1583 1584 nla_nest_end(msg, nl_cmds); 1585 state->split_start++; 1586 if (state->split) 1587 break; 1588 case 5: 1589 if (rdev->ops->remain_on_channel && 1590 (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) && 1591 nla_put_u32(msg, 1592 NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION, 1593 rdev->wiphy.max_remain_on_channel_duration)) 1594 goto nla_put_failure; 1595 1596 if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) && 1597 nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK)) 1598 goto nla_put_failure; 1599 1600 if (nl80211_send_mgmt_stypes(msg, mgmt_stypes)) 1601 goto nla_put_failure; 1602 state->split_start++; 1603 if (state->split) 1604 break; 1605 case 6: 1606 #ifdef CONFIG_PM 1607 if (nl80211_send_wowlan(msg, rdev, state->split)) 1608 goto nla_put_failure; 1609 state->split_start++; 1610 if (state->split) 1611 break; 1612 #else 1613 state->split_start++; 1614 #endif 1615 case 7: 1616 if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES, 1617 rdev->wiphy.software_iftypes)) 1618 goto nla_put_failure; 1619 1620 if (nl80211_put_iface_combinations(&rdev->wiphy, msg, 1621 state->split)) 1622 goto nla_put_failure; 1623 1624 state->split_start++; 1625 if (state->split) 1626 break; 1627 case 8: 1628 if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) && 1629 nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME, 1630 rdev->wiphy.ap_sme_capa)) 1631 goto nla_put_failure; 1632 1633 features = rdev->wiphy.features; 1634 /* 1635 * We can only add the per-channel limit information if the 1636 * dump is split, otherwise it makes it too big. Therefore 1637 * only advertise it in that case. 1638 */ 1639 if (state->split) 1640 features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS; 1641 if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features)) 1642 goto nla_put_failure; 1643 1644 if (rdev->wiphy.ht_capa_mod_mask && 1645 nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK, 1646 sizeof(*rdev->wiphy.ht_capa_mod_mask), 1647 rdev->wiphy.ht_capa_mod_mask)) 1648 goto nla_put_failure; 1649 1650 if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME && 1651 rdev->wiphy.max_acl_mac_addrs && 1652 nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX, 1653 rdev->wiphy.max_acl_mac_addrs)) 1654 goto nla_put_failure; 1655 1656 /* 1657 * Any information below this point is only available to 1658 * applications that can deal with it being split. This 1659 * helps ensure that newly added capabilities don't break 1660 * older tools by overrunning their buffers. 1661 * 1662 * We still increment split_start so that in the split 1663 * case we'll continue with more data in the next round, 1664 * but break unconditionally so unsplit data stops here. 1665 */ 1666 state->split_start++; 1667 break; 1668 case 9: 1669 if (rdev->wiphy.extended_capabilities && 1670 (nla_put(msg, NL80211_ATTR_EXT_CAPA, 1671 rdev->wiphy.extended_capabilities_len, 1672 rdev->wiphy.extended_capabilities) || 1673 nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK, 1674 rdev->wiphy.extended_capabilities_len, 1675 rdev->wiphy.extended_capabilities_mask))) 1676 goto nla_put_failure; 1677 1678 if (rdev->wiphy.vht_capa_mod_mask && 1679 nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK, 1680 sizeof(*rdev->wiphy.vht_capa_mod_mask), 1681 rdev->wiphy.vht_capa_mod_mask)) 1682 goto nla_put_failure; 1683 1684 state->split_start++; 1685 break; 1686 case 10: 1687 if (nl80211_send_coalesce(msg, rdev)) 1688 goto nla_put_failure; 1689 1690 if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) && 1691 (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) || 1692 nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ))) 1693 goto nla_put_failure; 1694 1695 if (rdev->wiphy.max_ap_assoc_sta && 1696 nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA, 1697 rdev->wiphy.max_ap_assoc_sta)) 1698 goto nla_put_failure; 1699 1700 state->split_start++; 1701 break; 1702 case 11: 1703 if (rdev->wiphy.n_vendor_commands) { 1704 const struct nl80211_vendor_cmd_info *info; 1705 struct nlattr *nested; 1706 1707 nested = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA); 1708 if (!nested) 1709 goto nla_put_failure; 1710 1711 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { 1712 info = &rdev->wiphy.vendor_commands[i].info; 1713 if (nla_put(msg, i + 1, sizeof(*info), info)) 1714 goto nla_put_failure; 1715 } 1716 nla_nest_end(msg, nested); 1717 } 1718 1719 if (rdev->wiphy.n_vendor_events) { 1720 const struct nl80211_vendor_cmd_info *info; 1721 struct nlattr *nested; 1722 1723 nested = nla_nest_start(msg, 1724 NL80211_ATTR_VENDOR_EVENTS); 1725 if (!nested) 1726 goto nla_put_failure; 1727 1728 for (i = 0; i < rdev->wiphy.n_vendor_events; i++) { 1729 info = &rdev->wiphy.vendor_events[i]; 1730 if (nla_put(msg, i + 1, sizeof(*info), info)) 1731 goto nla_put_failure; 1732 } 1733 nla_nest_end(msg, nested); 1734 } 1735 state->split_start++; 1736 break; 1737 case 12: 1738 if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH && 1739 nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS, 1740 rdev->wiphy.max_num_csa_counters)) 1741 goto nla_put_failure; 1742 1743 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && 1744 nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG)) 1745 goto nla_put_failure; 1746 1747 if (nla_put(msg, NL80211_ATTR_EXT_FEATURES, 1748 sizeof(rdev->wiphy.ext_features), 1749 rdev->wiphy.ext_features)) 1750 goto nla_put_failure; 1751 1752 if (rdev->wiphy.bss_select_support) { 1753 struct nlattr *nested; 1754 u32 bss_select_support = rdev->wiphy.bss_select_support; 1755 1756 nested = nla_nest_start(msg, NL80211_ATTR_BSS_SELECT); 1757 if (!nested) 1758 goto nla_put_failure; 1759 1760 i = 0; 1761 while (bss_select_support) { 1762 if ((bss_select_support & 1) && 1763 nla_put_flag(msg, i)) 1764 goto nla_put_failure; 1765 i++; 1766 bss_select_support >>= 1; 1767 } 1768 nla_nest_end(msg, nested); 1769 } 1770 1771 state->split_start++; 1772 break; 1773 case 13: 1774 if (rdev->wiphy.num_iftype_ext_capab && 1775 rdev->wiphy.iftype_ext_capab) { 1776 struct nlattr *nested_ext_capab, *nested; 1777 1778 nested = nla_nest_start(msg, 1779 NL80211_ATTR_IFTYPE_EXT_CAPA); 1780 if (!nested) 1781 goto nla_put_failure; 1782 1783 for (i = state->capa_start; 1784 i < rdev->wiphy.num_iftype_ext_capab; i++) { 1785 const struct wiphy_iftype_ext_capab *capab; 1786 1787 capab = &rdev->wiphy.iftype_ext_capab[i]; 1788 1789 nested_ext_capab = nla_nest_start(msg, i); 1790 if (!nested_ext_capab || 1791 nla_put_u32(msg, NL80211_ATTR_IFTYPE, 1792 capab->iftype) || 1793 nla_put(msg, NL80211_ATTR_EXT_CAPA, 1794 capab->extended_capabilities_len, 1795 capab->extended_capabilities) || 1796 nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK, 1797 capab->extended_capabilities_len, 1798 capab->extended_capabilities_mask)) 1799 goto nla_put_failure; 1800 1801 nla_nest_end(msg, nested_ext_capab); 1802 if (state->split) 1803 break; 1804 } 1805 nla_nest_end(msg, nested); 1806 if (i < rdev->wiphy.num_iftype_ext_capab) { 1807 state->capa_start = i + 1; 1808 break; 1809 } 1810 } 1811 1812 /* done */ 1813 state->split_start = 0; 1814 break; 1815 } 1816 finish: 1817 genlmsg_end(msg, hdr); 1818 return 0; 1819 1820 nla_put_failure: 1821 genlmsg_cancel(msg, hdr); 1822 return -EMSGSIZE; 1823 } 1824 1825 static int nl80211_dump_wiphy_parse(struct sk_buff *skb, 1826 struct netlink_callback *cb, 1827 struct nl80211_dump_wiphy_state *state) 1828 { 1829 struct nlattr **tb = nl80211_fam.attrbuf; 1830 int ret = nlmsg_parse(cb->nlh, GENL_HDRLEN + nl80211_fam.hdrsize, 1831 tb, nl80211_fam.maxattr, nl80211_policy); 1832 /* ignore parse errors for backward compatibility */ 1833 if (ret) 1834 return 0; 1835 1836 state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP]; 1837 if (tb[NL80211_ATTR_WIPHY]) 1838 state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]); 1839 if (tb[NL80211_ATTR_WDEV]) 1840 state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32; 1841 if (tb[NL80211_ATTR_IFINDEX]) { 1842 struct net_device *netdev; 1843 struct cfg80211_registered_device *rdev; 1844 int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]); 1845 1846 netdev = __dev_get_by_index(sock_net(skb->sk), ifidx); 1847 if (!netdev) 1848 return -ENODEV; 1849 if (netdev->ieee80211_ptr) { 1850 rdev = wiphy_to_rdev( 1851 netdev->ieee80211_ptr->wiphy); 1852 state->filter_wiphy = rdev->wiphy_idx; 1853 } 1854 } 1855 1856 return 0; 1857 } 1858 1859 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb) 1860 { 1861 int idx = 0, ret; 1862 struct nl80211_dump_wiphy_state *state = (void *)cb->args[0]; 1863 struct cfg80211_registered_device *rdev; 1864 1865 rtnl_lock(); 1866 if (!state) { 1867 state = kzalloc(sizeof(*state), GFP_KERNEL); 1868 if (!state) { 1869 rtnl_unlock(); 1870 return -ENOMEM; 1871 } 1872 state->filter_wiphy = -1; 1873 ret = nl80211_dump_wiphy_parse(skb, cb, state); 1874 if (ret) { 1875 kfree(state); 1876 rtnl_unlock(); 1877 return ret; 1878 } 1879 cb->args[0] = (long)state; 1880 } 1881 1882 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 1883 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk))) 1884 continue; 1885 if (++idx <= state->start) 1886 continue; 1887 if (state->filter_wiphy != -1 && 1888 state->filter_wiphy != rdev->wiphy_idx) 1889 continue; 1890 /* attempt to fit multiple wiphy data chunks into the skb */ 1891 do { 1892 ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, 1893 skb, 1894 NETLINK_CB(cb->skb).portid, 1895 cb->nlh->nlmsg_seq, 1896 NLM_F_MULTI, state); 1897 if (ret < 0) { 1898 /* 1899 * If sending the wiphy data didn't fit (ENOBUFS 1900 * or EMSGSIZE returned), this SKB is still 1901 * empty (so it's not too big because another 1902 * wiphy dataset is already in the skb) and 1903 * we've not tried to adjust the dump allocation 1904 * yet ... then adjust the alloc size to be 1905 * bigger, and return 1 but with the empty skb. 1906 * This results in an empty message being RX'ed 1907 * in userspace, but that is ignored. 1908 * 1909 * We can then retry with the larger buffer. 1910 */ 1911 if ((ret == -ENOBUFS || ret == -EMSGSIZE) && 1912 !skb->len && !state->split && 1913 cb->min_dump_alloc < 4096) { 1914 cb->min_dump_alloc = 4096; 1915 state->split_start = 0; 1916 rtnl_unlock(); 1917 return 1; 1918 } 1919 idx--; 1920 break; 1921 } 1922 } while (state->split_start > 0); 1923 break; 1924 } 1925 rtnl_unlock(); 1926 1927 state->start = idx; 1928 1929 return skb->len; 1930 } 1931 1932 static int nl80211_dump_wiphy_done(struct netlink_callback *cb) 1933 { 1934 kfree((void *)cb->args[0]); 1935 return 0; 1936 } 1937 1938 static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info) 1939 { 1940 struct sk_buff *msg; 1941 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 1942 struct nl80211_dump_wiphy_state state = {}; 1943 1944 msg = nlmsg_new(4096, GFP_KERNEL); 1945 if (!msg) 1946 return -ENOMEM; 1947 1948 if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg, 1949 info->snd_portid, info->snd_seq, 0, 1950 &state) < 0) { 1951 nlmsg_free(msg); 1952 return -ENOBUFS; 1953 } 1954 1955 return genlmsg_reply(msg, info); 1956 } 1957 1958 static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = { 1959 [NL80211_TXQ_ATTR_QUEUE] = { .type = NLA_U8 }, 1960 [NL80211_TXQ_ATTR_TXOP] = { .type = NLA_U16 }, 1961 [NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 }, 1962 [NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 }, 1963 [NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 }, 1964 }; 1965 1966 static int parse_txq_params(struct nlattr *tb[], 1967 struct ieee80211_txq_params *txq_params) 1968 { 1969 if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] || 1970 !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] || 1971 !tb[NL80211_TXQ_ATTR_AIFS]) 1972 return -EINVAL; 1973 1974 txq_params->ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]); 1975 txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]); 1976 txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]); 1977 txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]); 1978 txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]); 1979 1980 if (txq_params->ac >= NL80211_NUM_ACS) 1981 return -EINVAL; 1982 1983 return 0; 1984 } 1985 1986 static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev) 1987 { 1988 /* 1989 * You can only set the channel explicitly for WDS interfaces, 1990 * all others have their channel managed via their respective 1991 * "establish a connection" command (connect, join, ...) 1992 * 1993 * For AP/GO and mesh mode, the channel can be set with the 1994 * channel userspace API, but is only stored and passed to the 1995 * low-level driver when the AP starts or the mesh is joined. 1996 * This is for backward compatibility, userspace can also give 1997 * the channel in the start-ap or join-mesh commands instead. 1998 * 1999 * Monitors are special as they are normally slaved to 2000 * whatever else is going on, so they have their own special 2001 * operation to set the monitor channel if possible. 2002 */ 2003 return !wdev || 2004 wdev->iftype == NL80211_IFTYPE_AP || 2005 wdev->iftype == NL80211_IFTYPE_MESH_POINT || 2006 wdev->iftype == NL80211_IFTYPE_MONITOR || 2007 wdev->iftype == NL80211_IFTYPE_P2P_GO; 2008 } 2009 2010 static int nl80211_parse_chandef(struct cfg80211_registered_device *rdev, 2011 struct genl_info *info, 2012 struct cfg80211_chan_def *chandef) 2013 { 2014 u32 control_freq; 2015 2016 if (!info->attrs[NL80211_ATTR_WIPHY_FREQ]) 2017 return -EINVAL; 2018 2019 control_freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]); 2020 2021 chandef->chan = ieee80211_get_channel(&rdev->wiphy, control_freq); 2022 chandef->width = NL80211_CHAN_WIDTH_20_NOHT; 2023 chandef->center_freq1 = control_freq; 2024 chandef->center_freq2 = 0; 2025 2026 /* Primary channel not allowed */ 2027 if (!chandef->chan || chandef->chan->flags & IEEE80211_CHAN_DISABLED) 2028 return -EINVAL; 2029 2030 if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) { 2031 enum nl80211_channel_type chantype; 2032 2033 chantype = nla_get_u32( 2034 info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]); 2035 2036 switch (chantype) { 2037 case NL80211_CHAN_NO_HT: 2038 case NL80211_CHAN_HT20: 2039 case NL80211_CHAN_HT40PLUS: 2040 case NL80211_CHAN_HT40MINUS: 2041 cfg80211_chandef_create(chandef, chandef->chan, 2042 chantype); 2043 break; 2044 default: 2045 return -EINVAL; 2046 } 2047 } else if (info->attrs[NL80211_ATTR_CHANNEL_WIDTH]) { 2048 chandef->width = 2049 nla_get_u32(info->attrs[NL80211_ATTR_CHANNEL_WIDTH]); 2050 if (info->attrs[NL80211_ATTR_CENTER_FREQ1]) 2051 chandef->center_freq1 = 2052 nla_get_u32( 2053 info->attrs[NL80211_ATTR_CENTER_FREQ1]); 2054 if (info->attrs[NL80211_ATTR_CENTER_FREQ2]) 2055 chandef->center_freq2 = 2056 nla_get_u32( 2057 info->attrs[NL80211_ATTR_CENTER_FREQ2]); 2058 } 2059 2060 if (!cfg80211_chandef_valid(chandef)) 2061 return -EINVAL; 2062 2063 if (!cfg80211_chandef_usable(&rdev->wiphy, chandef, 2064 IEEE80211_CHAN_DISABLED)) 2065 return -EINVAL; 2066 2067 if ((chandef->width == NL80211_CHAN_WIDTH_5 || 2068 chandef->width == NL80211_CHAN_WIDTH_10) && 2069 !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ)) 2070 return -EINVAL; 2071 2072 return 0; 2073 } 2074 2075 static int __nl80211_set_channel(struct cfg80211_registered_device *rdev, 2076 struct net_device *dev, 2077 struct genl_info *info) 2078 { 2079 struct cfg80211_chan_def chandef; 2080 int result; 2081 enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR; 2082 struct wireless_dev *wdev = NULL; 2083 2084 if (dev) 2085 wdev = dev->ieee80211_ptr; 2086 if (!nl80211_can_set_dev_channel(wdev)) 2087 return -EOPNOTSUPP; 2088 if (wdev) 2089 iftype = wdev->iftype; 2090 2091 result = nl80211_parse_chandef(rdev, info, &chandef); 2092 if (result) 2093 return result; 2094 2095 switch (iftype) { 2096 case NL80211_IFTYPE_AP: 2097 case NL80211_IFTYPE_P2P_GO: 2098 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef, 2099 iftype)) { 2100 result = -EINVAL; 2101 break; 2102 } 2103 if (wdev->beacon_interval) { 2104 if (!dev || !rdev->ops->set_ap_chanwidth || 2105 !(rdev->wiphy.features & 2106 NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE)) { 2107 result = -EBUSY; 2108 break; 2109 } 2110 2111 /* Only allow dynamic channel width changes */ 2112 if (chandef.chan != wdev->preset_chandef.chan) { 2113 result = -EBUSY; 2114 break; 2115 } 2116 result = rdev_set_ap_chanwidth(rdev, dev, &chandef); 2117 if (result) 2118 break; 2119 } 2120 wdev->preset_chandef = chandef; 2121 result = 0; 2122 break; 2123 case NL80211_IFTYPE_MESH_POINT: 2124 result = cfg80211_set_mesh_channel(rdev, wdev, &chandef); 2125 break; 2126 case NL80211_IFTYPE_MONITOR: 2127 result = cfg80211_set_monitor_channel(rdev, &chandef); 2128 break; 2129 default: 2130 result = -EINVAL; 2131 } 2132 2133 return result; 2134 } 2135 2136 static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info) 2137 { 2138 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2139 struct net_device *netdev = info->user_ptr[1]; 2140 2141 return __nl80211_set_channel(rdev, netdev, info); 2142 } 2143 2144 static int nl80211_set_wds_peer(struct sk_buff *skb, struct genl_info *info) 2145 { 2146 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2147 struct net_device *dev = info->user_ptr[1]; 2148 struct wireless_dev *wdev = dev->ieee80211_ptr; 2149 const u8 *bssid; 2150 2151 if (!info->attrs[NL80211_ATTR_MAC]) 2152 return -EINVAL; 2153 2154 if (netif_running(dev)) 2155 return -EBUSY; 2156 2157 if (!rdev->ops->set_wds_peer) 2158 return -EOPNOTSUPP; 2159 2160 if (wdev->iftype != NL80211_IFTYPE_WDS) 2161 return -EOPNOTSUPP; 2162 2163 bssid = nla_data(info->attrs[NL80211_ATTR_MAC]); 2164 return rdev_set_wds_peer(rdev, dev, bssid); 2165 } 2166 2167 static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) 2168 { 2169 struct cfg80211_registered_device *rdev; 2170 struct net_device *netdev = NULL; 2171 struct wireless_dev *wdev; 2172 int result = 0, rem_txq_params = 0; 2173 struct nlattr *nl_txq_params; 2174 u32 changed; 2175 u8 retry_short = 0, retry_long = 0; 2176 u32 frag_threshold = 0, rts_threshold = 0; 2177 u8 coverage_class = 0; 2178 2179 ASSERT_RTNL(); 2180 2181 /* 2182 * Try to find the wiphy and netdev. Normally this 2183 * function shouldn't need the netdev, but this is 2184 * done for backward compatibility -- previously 2185 * setting the channel was done per wiphy, but now 2186 * it is per netdev. Previous userland like hostapd 2187 * also passed a netdev to set_wiphy, so that it is 2188 * possible to let that go to the right netdev! 2189 */ 2190 2191 if (info->attrs[NL80211_ATTR_IFINDEX]) { 2192 int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); 2193 2194 netdev = __dev_get_by_index(genl_info_net(info), ifindex); 2195 if (netdev && netdev->ieee80211_ptr) 2196 rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy); 2197 else 2198 netdev = NULL; 2199 } 2200 2201 if (!netdev) { 2202 rdev = __cfg80211_rdev_from_attrs(genl_info_net(info), 2203 info->attrs); 2204 if (IS_ERR(rdev)) 2205 return PTR_ERR(rdev); 2206 wdev = NULL; 2207 netdev = NULL; 2208 result = 0; 2209 } else 2210 wdev = netdev->ieee80211_ptr; 2211 2212 /* 2213 * end workaround code, by now the rdev is available 2214 * and locked, and wdev may or may not be NULL. 2215 */ 2216 2217 if (info->attrs[NL80211_ATTR_WIPHY_NAME]) 2218 result = cfg80211_dev_rename( 2219 rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME])); 2220 2221 if (result) 2222 return result; 2223 2224 if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) { 2225 struct ieee80211_txq_params txq_params; 2226 struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1]; 2227 2228 if (!rdev->ops->set_txq_params) 2229 return -EOPNOTSUPP; 2230 2231 if (!netdev) 2232 return -EINVAL; 2233 2234 if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 2235 netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 2236 return -EINVAL; 2237 2238 if (!netif_running(netdev)) 2239 return -ENETDOWN; 2240 2241 nla_for_each_nested(nl_txq_params, 2242 info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS], 2243 rem_txq_params) { 2244 result = nla_parse(tb, NL80211_TXQ_ATTR_MAX, 2245 nla_data(nl_txq_params), 2246 nla_len(nl_txq_params), 2247 txq_params_policy); 2248 if (result) 2249 return result; 2250 result = parse_txq_params(tb, &txq_params); 2251 if (result) 2252 return result; 2253 2254 result = rdev_set_txq_params(rdev, netdev, 2255 &txq_params); 2256 if (result) 2257 return result; 2258 } 2259 } 2260 2261 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { 2262 result = __nl80211_set_channel( 2263 rdev, 2264 nl80211_can_set_dev_channel(wdev) ? netdev : NULL, 2265 info); 2266 if (result) 2267 return result; 2268 } 2269 2270 if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) { 2271 struct wireless_dev *txp_wdev = wdev; 2272 enum nl80211_tx_power_setting type; 2273 int idx, mbm = 0; 2274 2275 if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER)) 2276 txp_wdev = NULL; 2277 2278 if (!rdev->ops->set_tx_power) 2279 return -EOPNOTSUPP; 2280 2281 idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING; 2282 type = nla_get_u32(info->attrs[idx]); 2283 2284 if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] && 2285 (type != NL80211_TX_POWER_AUTOMATIC)) 2286 return -EINVAL; 2287 2288 if (type != NL80211_TX_POWER_AUTOMATIC) { 2289 idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL; 2290 mbm = nla_get_u32(info->attrs[idx]); 2291 } 2292 2293 result = rdev_set_tx_power(rdev, txp_wdev, type, mbm); 2294 if (result) 2295 return result; 2296 } 2297 2298 if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] && 2299 info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) { 2300 u32 tx_ant, rx_ant; 2301 2302 if ((!rdev->wiphy.available_antennas_tx && 2303 !rdev->wiphy.available_antennas_rx) || 2304 !rdev->ops->set_antenna) 2305 return -EOPNOTSUPP; 2306 2307 tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]); 2308 rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]); 2309 2310 /* reject antenna configurations which don't match the 2311 * available antenna masks, except for the "all" mask */ 2312 if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) || 2313 (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) 2314 return -EINVAL; 2315 2316 tx_ant = tx_ant & rdev->wiphy.available_antennas_tx; 2317 rx_ant = rx_ant & rdev->wiphy.available_antennas_rx; 2318 2319 result = rdev_set_antenna(rdev, tx_ant, rx_ant); 2320 if (result) 2321 return result; 2322 } 2323 2324 changed = 0; 2325 2326 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) { 2327 retry_short = nla_get_u8( 2328 info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]); 2329 if (retry_short == 0) 2330 return -EINVAL; 2331 2332 changed |= WIPHY_PARAM_RETRY_SHORT; 2333 } 2334 2335 if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) { 2336 retry_long = nla_get_u8( 2337 info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]); 2338 if (retry_long == 0) 2339 return -EINVAL; 2340 2341 changed |= WIPHY_PARAM_RETRY_LONG; 2342 } 2343 2344 if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) { 2345 frag_threshold = nla_get_u32( 2346 info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]); 2347 if (frag_threshold < 256) 2348 return -EINVAL; 2349 2350 if (frag_threshold != (u32) -1) { 2351 /* 2352 * Fragments (apart from the last one) are required to 2353 * have even length. Make the fragmentation code 2354 * simpler by stripping LSB should someone try to use 2355 * odd threshold value. 2356 */ 2357 frag_threshold &= ~0x1; 2358 } 2359 changed |= WIPHY_PARAM_FRAG_THRESHOLD; 2360 } 2361 2362 if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) { 2363 rts_threshold = nla_get_u32( 2364 info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]); 2365 changed |= WIPHY_PARAM_RTS_THRESHOLD; 2366 } 2367 2368 if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) { 2369 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) 2370 return -EINVAL; 2371 2372 coverage_class = nla_get_u8( 2373 info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]); 2374 changed |= WIPHY_PARAM_COVERAGE_CLASS; 2375 } 2376 2377 if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) { 2378 if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION)) 2379 return -EOPNOTSUPP; 2380 2381 changed |= WIPHY_PARAM_DYN_ACK; 2382 } 2383 2384 if (changed) { 2385 u8 old_retry_short, old_retry_long; 2386 u32 old_frag_threshold, old_rts_threshold; 2387 u8 old_coverage_class; 2388 2389 if (!rdev->ops->set_wiphy_params) 2390 return -EOPNOTSUPP; 2391 2392 old_retry_short = rdev->wiphy.retry_short; 2393 old_retry_long = rdev->wiphy.retry_long; 2394 old_frag_threshold = rdev->wiphy.frag_threshold; 2395 old_rts_threshold = rdev->wiphy.rts_threshold; 2396 old_coverage_class = rdev->wiphy.coverage_class; 2397 2398 if (changed & WIPHY_PARAM_RETRY_SHORT) 2399 rdev->wiphy.retry_short = retry_short; 2400 if (changed & WIPHY_PARAM_RETRY_LONG) 2401 rdev->wiphy.retry_long = retry_long; 2402 if (changed & WIPHY_PARAM_FRAG_THRESHOLD) 2403 rdev->wiphy.frag_threshold = frag_threshold; 2404 if (changed & WIPHY_PARAM_RTS_THRESHOLD) 2405 rdev->wiphy.rts_threshold = rts_threshold; 2406 if (changed & WIPHY_PARAM_COVERAGE_CLASS) 2407 rdev->wiphy.coverage_class = coverage_class; 2408 2409 result = rdev_set_wiphy_params(rdev, changed); 2410 if (result) { 2411 rdev->wiphy.retry_short = old_retry_short; 2412 rdev->wiphy.retry_long = old_retry_long; 2413 rdev->wiphy.frag_threshold = old_frag_threshold; 2414 rdev->wiphy.rts_threshold = old_rts_threshold; 2415 rdev->wiphy.coverage_class = old_coverage_class; 2416 return result; 2417 } 2418 } 2419 return 0; 2420 } 2421 2422 static inline u64 wdev_id(struct wireless_dev *wdev) 2423 { 2424 return (u64)wdev->identifier | 2425 ((u64)wiphy_to_rdev(wdev->wiphy)->wiphy_idx << 32); 2426 } 2427 2428 static int nl80211_send_chandef(struct sk_buff *msg, 2429 const struct cfg80211_chan_def *chandef) 2430 { 2431 if (WARN_ON(!cfg80211_chandef_valid(chandef))) 2432 return -EINVAL; 2433 2434 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, 2435 chandef->chan->center_freq)) 2436 return -ENOBUFS; 2437 switch (chandef->width) { 2438 case NL80211_CHAN_WIDTH_20_NOHT: 2439 case NL80211_CHAN_WIDTH_20: 2440 case NL80211_CHAN_WIDTH_40: 2441 if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, 2442 cfg80211_get_chandef_type(chandef))) 2443 return -ENOBUFS; 2444 break; 2445 default: 2446 break; 2447 } 2448 if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width)) 2449 return -ENOBUFS; 2450 if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1)) 2451 return -ENOBUFS; 2452 if (chandef->center_freq2 && 2453 nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2)) 2454 return -ENOBUFS; 2455 return 0; 2456 } 2457 2458 static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags, 2459 struct cfg80211_registered_device *rdev, 2460 struct wireless_dev *wdev, bool removal) 2461 { 2462 struct net_device *dev = wdev->netdev; 2463 u8 cmd = NL80211_CMD_NEW_INTERFACE; 2464 void *hdr; 2465 2466 if (removal) 2467 cmd = NL80211_CMD_DEL_INTERFACE; 2468 2469 hdr = nl80211hdr_put(msg, portid, seq, flags, cmd); 2470 if (!hdr) 2471 return -1; 2472 2473 if (dev && 2474 (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) || 2475 nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name))) 2476 goto nla_put_failure; 2477 2478 if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) || 2479 nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) || 2480 nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev), 2481 NL80211_ATTR_PAD) || 2482 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) || 2483 nla_put_u32(msg, NL80211_ATTR_GENERATION, 2484 rdev->devlist_generation ^ 2485 (cfg80211_rdev_list_generation << 2))) 2486 goto nla_put_failure; 2487 2488 if (rdev->ops->get_channel) { 2489 int ret; 2490 struct cfg80211_chan_def chandef; 2491 2492 ret = rdev_get_channel(rdev, wdev, &chandef); 2493 if (ret == 0) { 2494 if (nl80211_send_chandef(msg, &chandef)) 2495 goto nla_put_failure; 2496 } 2497 } 2498 2499 if (rdev->ops->get_tx_power) { 2500 int dbm, ret; 2501 2502 ret = rdev_get_tx_power(rdev, wdev, &dbm); 2503 if (ret == 0 && 2504 nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL, 2505 DBM_TO_MBM(dbm))) 2506 goto nla_put_failure; 2507 } 2508 2509 if (wdev->ssid_len) { 2510 if (nla_put(msg, NL80211_ATTR_SSID, wdev->ssid_len, wdev->ssid)) 2511 goto nla_put_failure; 2512 } 2513 2514 genlmsg_end(msg, hdr); 2515 return 0; 2516 2517 nla_put_failure: 2518 genlmsg_cancel(msg, hdr); 2519 return -EMSGSIZE; 2520 } 2521 2522 static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb) 2523 { 2524 int wp_idx = 0; 2525 int if_idx = 0; 2526 int wp_start = cb->args[0]; 2527 int if_start = cb->args[1]; 2528 struct cfg80211_registered_device *rdev; 2529 struct wireless_dev *wdev; 2530 2531 rtnl_lock(); 2532 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 2533 if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk))) 2534 continue; 2535 if (wp_idx < wp_start) { 2536 wp_idx++; 2537 continue; 2538 } 2539 if_idx = 0; 2540 2541 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 2542 if (if_idx < if_start) { 2543 if_idx++; 2544 continue; 2545 } 2546 if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid, 2547 cb->nlh->nlmsg_seq, NLM_F_MULTI, 2548 rdev, wdev, false) < 0) { 2549 goto out; 2550 } 2551 if_idx++; 2552 } 2553 2554 wp_idx++; 2555 } 2556 out: 2557 rtnl_unlock(); 2558 2559 cb->args[0] = wp_idx; 2560 cb->args[1] = if_idx; 2561 2562 return skb->len; 2563 } 2564 2565 static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info) 2566 { 2567 struct sk_buff *msg; 2568 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2569 struct wireless_dev *wdev = info->user_ptr[1]; 2570 2571 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2572 if (!msg) 2573 return -ENOMEM; 2574 2575 if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0, 2576 rdev, wdev, false) < 0) { 2577 nlmsg_free(msg); 2578 return -ENOBUFS; 2579 } 2580 2581 return genlmsg_reply(msg, info); 2582 } 2583 2584 static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = { 2585 [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG }, 2586 [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG }, 2587 [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG }, 2588 [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG }, 2589 [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG }, 2590 [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG }, 2591 }; 2592 2593 static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags) 2594 { 2595 struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1]; 2596 int flag; 2597 2598 *mntrflags = 0; 2599 2600 if (!nla) 2601 return -EINVAL; 2602 2603 if (nla_parse_nested(flags, NL80211_MNTR_FLAG_MAX, 2604 nla, mntr_flags_policy)) 2605 return -EINVAL; 2606 2607 for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++) 2608 if (flags[flag]) 2609 *mntrflags |= (1<<flag); 2610 2611 return 0; 2612 } 2613 2614 static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev, 2615 struct net_device *netdev, u8 use_4addr, 2616 enum nl80211_iftype iftype) 2617 { 2618 if (!use_4addr) { 2619 if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT)) 2620 return -EBUSY; 2621 return 0; 2622 } 2623 2624 switch (iftype) { 2625 case NL80211_IFTYPE_AP_VLAN: 2626 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP) 2627 return 0; 2628 break; 2629 case NL80211_IFTYPE_STATION: 2630 if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION) 2631 return 0; 2632 break; 2633 default: 2634 break; 2635 } 2636 2637 return -EOPNOTSUPP; 2638 } 2639 2640 static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info) 2641 { 2642 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2643 struct vif_params params; 2644 int err; 2645 enum nl80211_iftype otype, ntype; 2646 struct net_device *dev = info->user_ptr[1]; 2647 u32 _flags, *flags = NULL; 2648 bool change = false; 2649 2650 memset(¶ms, 0, sizeof(params)); 2651 2652 otype = ntype = dev->ieee80211_ptr->iftype; 2653 2654 if (info->attrs[NL80211_ATTR_IFTYPE]) { 2655 ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); 2656 if (otype != ntype) 2657 change = true; 2658 if (ntype > NL80211_IFTYPE_MAX) 2659 return -EINVAL; 2660 } 2661 2662 if (info->attrs[NL80211_ATTR_MESH_ID]) { 2663 struct wireless_dev *wdev = dev->ieee80211_ptr; 2664 2665 if (ntype != NL80211_IFTYPE_MESH_POINT) 2666 return -EINVAL; 2667 if (netif_running(dev)) 2668 return -EBUSY; 2669 2670 wdev_lock(wdev); 2671 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != 2672 IEEE80211_MAX_MESH_ID_LEN); 2673 wdev->mesh_id_up_len = 2674 nla_len(info->attrs[NL80211_ATTR_MESH_ID]); 2675 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]), 2676 wdev->mesh_id_up_len); 2677 wdev_unlock(wdev); 2678 } 2679 2680 if (info->attrs[NL80211_ATTR_4ADDR]) { 2681 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]); 2682 change = true; 2683 err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype); 2684 if (err) 2685 return err; 2686 } else { 2687 params.use_4addr = -1; 2688 } 2689 2690 if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) { 2691 if (ntype != NL80211_IFTYPE_MONITOR) 2692 return -EINVAL; 2693 err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS], 2694 &_flags); 2695 if (err) 2696 return err; 2697 2698 flags = &_flags; 2699 change = true; 2700 } 2701 2702 if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) { 2703 const u8 *mumimo_groups; 2704 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER; 2705 2706 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag)) 2707 return -EOPNOTSUPP; 2708 2709 mumimo_groups = 2710 nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]); 2711 2712 /* bits 0 and 63 are reserved and must be zero */ 2713 if ((mumimo_groups[0] & BIT(7)) || 2714 (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0))) 2715 return -EINVAL; 2716 2717 memcpy(params.vht_mumimo_groups, mumimo_groups, 2718 VHT_MUMIMO_GROUPS_DATA_LEN); 2719 change = true; 2720 } 2721 2722 if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) { 2723 u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER; 2724 2725 if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag)) 2726 return -EOPNOTSUPP; 2727 2728 nla_memcpy(params.macaddr, 2729 info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR], 2730 ETH_ALEN); 2731 change = true; 2732 } 2733 2734 if (flags && (*flags & MONITOR_FLAG_ACTIVE) && 2735 !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR)) 2736 return -EOPNOTSUPP; 2737 2738 if (change) 2739 err = cfg80211_change_iface(rdev, dev, ntype, flags, ¶ms); 2740 else 2741 err = 0; 2742 2743 if (!err && params.use_4addr != -1) 2744 dev->ieee80211_ptr->use_4addr = params.use_4addr; 2745 2746 return err; 2747 } 2748 2749 static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info) 2750 { 2751 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2752 struct vif_params params; 2753 struct wireless_dev *wdev; 2754 struct sk_buff *msg, *event; 2755 int err; 2756 enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED; 2757 u32 flags; 2758 2759 /* to avoid failing a new interface creation due to pending removal */ 2760 cfg80211_destroy_ifaces(rdev); 2761 2762 memset(¶ms, 0, sizeof(params)); 2763 2764 if (!info->attrs[NL80211_ATTR_IFNAME]) 2765 return -EINVAL; 2766 2767 if (info->attrs[NL80211_ATTR_IFTYPE]) { 2768 type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]); 2769 if (type > NL80211_IFTYPE_MAX) 2770 return -EINVAL; 2771 } 2772 2773 if (!rdev->ops->add_virtual_intf || 2774 !(rdev->wiphy.interface_modes & (1 << type))) 2775 return -EOPNOTSUPP; 2776 2777 if ((type == NL80211_IFTYPE_P2P_DEVICE || 2778 rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) && 2779 info->attrs[NL80211_ATTR_MAC]) { 2780 nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC], 2781 ETH_ALEN); 2782 if (!is_valid_ether_addr(params.macaddr)) 2783 return -EADDRNOTAVAIL; 2784 } 2785 2786 if (info->attrs[NL80211_ATTR_4ADDR]) { 2787 params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]); 2788 err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type); 2789 if (err) 2790 return err; 2791 } 2792 2793 err = parse_monitor_flags(type == NL80211_IFTYPE_MONITOR ? 2794 info->attrs[NL80211_ATTR_MNTR_FLAGS] : NULL, 2795 &flags); 2796 2797 if (!err && (flags & MONITOR_FLAG_ACTIVE) && 2798 !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR)) 2799 return -EOPNOTSUPP; 2800 2801 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2802 if (!msg) 2803 return -ENOMEM; 2804 2805 wdev = rdev_add_virtual_intf(rdev, 2806 nla_data(info->attrs[NL80211_ATTR_IFNAME]), 2807 NET_NAME_USER, type, err ? NULL : &flags, 2808 ¶ms); 2809 if (WARN_ON(!wdev)) { 2810 nlmsg_free(msg); 2811 return -EPROTO; 2812 } else if (IS_ERR(wdev)) { 2813 nlmsg_free(msg); 2814 return PTR_ERR(wdev); 2815 } 2816 2817 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) 2818 wdev->owner_nlportid = info->snd_portid; 2819 2820 switch (type) { 2821 case NL80211_IFTYPE_MESH_POINT: 2822 if (!info->attrs[NL80211_ATTR_MESH_ID]) 2823 break; 2824 wdev_lock(wdev); 2825 BUILD_BUG_ON(IEEE80211_MAX_SSID_LEN != 2826 IEEE80211_MAX_MESH_ID_LEN); 2827 wdev->mesh_id_up_len = 2828 nla_len(info->attrs[NL80211_ATTR_MESH_ID]); 2829 memcpy(wdev->ssid, nla_data(info->attrs[NL80211_ATTR_MESH_ID]), 2830 wdev->mesh_id_up_len); 2831 wdev_unlock(wdev); 2832 break; 2833 case NL80211_IFTYPE_P2P_DEVICE: 2834 /* 2835 * P2P Device doesn't have a netdev, so doesn't go 2836 * through the netdev notifier and must be added here 2837 */ 2838 mutex_init(&wdev->mtx); 2839 INIT_LIST_HEAD(&wdev->event_list); 2840 spin_lock_init(&wdev->event_lock); 2841 INIT_LIST_HEAD(&wdev->mgmt_registrations); 2842 spin_lock_init(&wdev->mgmt_registrations_lock); 2843 2844 wdev->identifier = ++rdev->wdev_id; 2845 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); 2846 rdev->devlist_generation++; 2847 break; 2848 default: 2849 break; 2850 } 2851 2852 if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0, 2853 rdev, wdev, false) < 0) { 2854 nlmsg_free(msg); 2855 return -ENOBUFS; 2856 } 2857 2858 event = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2859 if (event) { 2860 if (nl80211_send_iface(event, 0, 0, 0, 2861 rdev, wdev, false) < 0) { 2862 nlmsg_free(event); 2863 goto out; 2864 } 2865 2866 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), 2867 event, 0, NL80211_MCGRP_CONFIG, 2868 GFP_KERNEL); 2869 } 2870 2871 out: 2872 return genlmsg_reply(msg, info); 2873 } 2874 2875 static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info) 2876 { 2877 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2878 struct wireless_dev *wdev = info->user_ptr[1]; 2879 struct sk_buff *msg; 2880 int status; 2881 2882 if (!rdev->ops->del_virtual_intf) 2883 return -EOPNOTSUPP; 2884 2885 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 2886 if (msg && nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, true) < 0) { 2887 nlmsg_free(msg); 2888 msg = NULL; 2889 } 2890 2891 /* 2892 * If we remove a wireless device without a netdev then clear 2893 * user_ptr[1] so that nl80211_post_doit won't dereference it 2894 * to check if it needs to do dev_put(). Otherwise it crashes 2895 * since the wdev has been freed, unlike with a netdev where 2896 * we need the dev_put() for the netdev to really be freed. 2897 */ 2898 if (!wdev->netdev) 2899 info->user_ptr[1] = NULL; 2900 2901 status = rdev_del_virtual_intf(rdev, wdev); 2902 if (status >= 0 && msg) 2903 genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), 2904 msg, 0, NL80211_MCGRP_CONFIG, 2905 GFP_KERNEL); 2906 else 2907 nlmsg_free(msg); 2908 2909 return status; 2910 } 2911 2912 static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info) 2913 { 2914 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2915 struct net_device *dev = info->user_ptr[1]; 2916 u16 noack_map; 2917 2918 if (!info->attrs[NL80211_ATTR_NOACK_MAP]) 2919 return -EINVAL; 2920 2921 if (!rdev->ops->set_noack_map) 2922 return -EOPNOTSUPP; 2923 2924 noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]); 2925 2926 return rdev_set_noack_map(rdev, dev, noack_map); 2927 } 2928 2929 struct get_key_cookie { 2930 struct sk_buff *msg; 2931 int error; 2932 int idx; 2933 }; 2934 2935 static void get_key_callback(void *c, struct key_params *params) 2936 { 2937 struct nlattr *key; 2938 struct get_key_cookie *cookie = c; 2939 2940 if ((params->key && 2941 nla_put(cookie->msg, NL80211_ATTR_KEY_DATA, 2942 params->key_len, params->key)) || 2943 (params->seq && 2944 nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ, 2945 params->seq_len, params->seq)) || 2946 (params->cipher && 2947 nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER, 2948 params->cipher))) 2949 goto nla_put_failure; 2950 2951 key = nla_nest_start(cookie->msg, NL80211_ATTR_KEY); 2952 if (!key) 2953 goto nla_put_failure; 2954 2955 if ((params->key && 2956 nla_put(cookie->msg, NL80211_KEY_DATA, 2957 params->key_len, params->key)) || 2958 (params->seq && 2959 nla_put(cookie->msg, NL80211_KEY_SEQ, 2960 params->seq_len, params->seq)) || 2961 (params->cipher && 2962 nla_put_u32(cookie->msg, NL80211_KEY_CIPHER, 2963 params->cipher))) 2964 goto nla_put_failure; 2965 2966 if (nla_put_u8(cookie->msg, NL80211_ATTR_KEY_IDX, cookie->idx)) 2967 goto nla_put_failure; 2968 2969 nla_nest_end(cookie->msg, key); 2970 2971 return; 2972 nla_put_failure: 2973 cookie->error = 1; 2974 } 2975 2976 static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info) 2977 { 2978 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 2979 int err; 2980 struct net_device *dev = info->user_ptr[1]; 2981 u8 key_idx = 0; 2982 const u8 *mac_addr = NULL; 2983 bool pairwise; 2984 struct get_key_cookie cookie = { 2985 .error = 0, 2986 }; 2987 void *hdr; 2988 struct sk_buff *msg; 2989 2990 if (info->attrs[NL80211_ATTR_KEY_IDX]) 2991 key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]); 2992 2993 if (key_idx > 5) 2994 return -EINVAL; 2995 2996 if (info->attrs[NL80211_ATTR_MAC]) 2997 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 2998 2999 pairwise = !!mac_addr; 3000 if (info->attrs[NL80211_ATTR_KEY_TYPE]) { 3001 u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]); 3002 3003 if (kt >= NUM_NL80211_KEYTYPES) 3004 return -EINVAL; 3005 if (kt != NL80211_KEYTYPE_GROUP && 3006 kt != NL80211_KEYTYPE_PAIRWISE) 3007 return -EINVAL; 3008 pairwise = kt == NL80211_KEYTYPE_PAIRWISE; 3009 } 3010 3011 if (!rdev->ops->get_key) 3012 return -EOPNOTSUPP; 3013 3014 if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) 3015 return -ENOENT; 3016 3017 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 3018 if (!msg) 3019 return -ENOMEM; 3020 3021 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, 3022 NL80211_CMD_NEW_KEY); 3023 if (!hdr) 3024 goto nla_put_failure; 3025 3026 cookie.msg = msg; 3027 cookie.idx = key_idx; 3028 3029 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) || 3030 nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx)) 3031 goto nla_put_failure; 3032 if (mac_addr && 3033 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr)) 3034 goto nla_put_failure; 3035 3036 err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie, 3037 get_key_callback); 3038 3039 if (err) 3040 goto free_msg; 3041 3042 if (cookie.error) 3043 goto nla_put_failure; 3044 3045 genlmsg_end(msg, hdr); 3046 return genlmsg_reply(msg, info); 3047 3048 nla_put_failure: 3049 err = -ENOBUFS; 3050 free_msg: 3051 nlmsg_free(msg); 3052 return err; 3053 } 3054 3055 static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info) 3056 { 3057 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3058 struct key_parse key; 3059 int err; 3060 struct net_device *dev = info->user_ptr[1]; 3061 3062 err = nl80211_parse_key(info, &key); 3063 if (err) 3064 return err; 3065 3066 if (key.idx < 0) 3067 return -EINVAL; 3068 3069 /* only support setting default key */ 3070 if (!key.def && !key.defmgmt) 3071 return -EINVAL; 3072 3073 wdev_lock(dev->ieee80211_ptr); 3074 3075 if (key.def) { 3076 if (!rdev->ops->set_default_key) { 3077 err = -EOPNOTSUPP; 3078 goto out; 3079 } 3080 3081 err = nl80211_key_allowed(dev->ieee80211_ptr); 3082 if (err) 3083 goto out; 3084 3085 err = rdev_set_default_key(rdev, dev, key.idx, 3086 key.def_uni, key.def_multi); 3087 3088 if (err) 3089 goto out; 3090 3091 #ifdef CONFIG_CFG80211_WEXT 3092 dev->ieee80211_ptr->wext.default_key = key.idx; 3093 #endif 3094 } else { 3095 if (key.def_uni || !key.def_multi) { 3096 err = -EINVAL; 3097 goto out; 3098 } 3099 3100 if (!rdev->ops->set_default_mgmt_key) { 3101 err = -EOPNOTSUPP; 3102 goto out; 3103 } 3104 3105 err = nl80211_key_allowed(dev->ieee80211_ptr); 3106 if (err) 3107 goto out; 3108 3109 err = rdev_set_default_mgmt_key(rdev, dev, key.idx); 3110 if (err) 3111 goto out; 3112 3113 #ifdef CONFIG_CFG80211_WEXT 3114 dev->ieee80211_ptr->wext.default_mgmt_key = key.idx; 3115 #endif 3116 } 3117 3118 out: 3119 wdev_unlock(dev->ieee80211_ptr); 3120 3121 return err; 3122 } 3123 3124 static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info) 3125 { 3126 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3127 int err; 3128 struct net_device *dev = info->user_ptr[1]; 3129 struct key_parse key; 3130 const u8 *mac_addr = NULL; 3131 3132 err = nl80211_parse_key(info, &key); 3133 if (err) 3134 return err; 3135 3136 if (!key.p.key) 3137 return -EINVAL; 3138 3139 if (info->attrs[NL80211_ATTR_MAC]) 3140 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 3141 3142 if (key.type == -1) { 3143 if (mac_addr) 3144 key.type = NL80211_KEYTYPE_PAIRWISE; 3145 else 3146 key.type = NL80211_KEYTYPE_GROUP; 3147 } 3148 3149 /* for now */ 3150 if (key.type != NL80211_KEYTYPE_PAIRWISE && 3151 key.type != NL80211_KEYTYPE_GROUP) 3152 return -EINVAL; 3153 3154 if (!rdev->ops->add_key) 3155 return -EOPNOTSUPP; 3156 3157 if (cfg80211_validate_key_settings(rdev, &key.p, key.idx, 3158 key.type == NL80211_KEYTYPE_PAIRWISE, 3159 mac_addr)) 3160 return -EINVAL; 3161 3162 wdev_lock(dev->ieee80211_ptr); 3163 err = nl80211_key_allowed(dev->ieee80211_ptr); 3164 if (!err) 3165 err = rdev_add_key(rdev, dev, key.idx, 3166 key.type == NL80211_KEYTYPE_PAIRWISE, 3167 mac_addr, &key.p); 3168 wdev_unlock(dev->ieee80211_ptr); 3169 3170 return err; 3171 } 3172 3173 static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info) 3174 { 3175 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3176 int err; 3177 struct net_device *dev = info->user_ptr[1]; 3178 u8 *mac_addr = NULL; 3179 struct key_parse key; 3180 3181 err = nl80211_parse_key(info, &key); 3182 if (err) 3183 return err; 3184 3185 if (info->attrs[NL80211_ATTR_MAC]) 3186 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 3187 3188 if (key.type == -1) { 3189 if (mac_addr) 3190 key.type = NL80211_KEYTYPE_PAIRWISE; 3191 else 3192 key.type = NL80211_KEYTYPE_GROUP; 3193 } 3194 3195 /* for now */ 3196 if (key.type != NL80211_KEYTYPE_PAIRWISE && 3197 key.type != NL80211_KEYTYPE_GROUP) 3198 return -EINVAL; 3199 3200 if (!rdev->ops->del_key) 3201 return -EOPNOTSUPP; 3202 3203 wdev_lock(dev->ieee80211_ptr); 3204 err = nl80211_key_allowed(dev->ieee80211_ptr); 3205 3206 if (key.type == NL80211_KEYTYPE_GROUP && mac_addr && 3207 !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)) 3208 err = -ENOENT; 3209 3210 if (!err) 3211 err = rdev_del_key(rdev, dev, key.idx, 3212 key.type == NL80211_KEYTYPE_PAIRWISE, 3213 mac_addr); 3214 3215 #ifdef CONFIG_CFG80211_WEXT 3216 if (!err) { 3217 if (key.idx == dev->ieee80211_ptr->wext.default_key) 3218 dev->ieee80211_ptr->wext.default_key = -1; 3219 else if (key.idx == dev->ieee80211_ptr->wext.default_mgmt_key) 3220 dev->ieee80211_ptr->wext.default_mgmt_key = -1; 3221 } 3222 #endif 3223 wdev_unlock(dev->ieee80211_ptr); 3224 3225 return err; 3226 } 3227 3228 /* This function returns an error or the number of nested attributes */ 3229 static int validate_acl_mac_addrs(struct nlattr *nl_attr) 3230 { 3231 struct nlattr *attr; 3232 int n_entries = 0, tmp; 3233 3234 nla_for_each_nested(attr, nl_attr, tmp) { 3235 if (nla_len(attr) != ETH_ALEN) 3236 return -EINVAL; 3237 3238 n_entries++; 3239 } 3240 3241 return n_entries; 3242 } 3243 3244 /* 3245 * This function parses ACL information and allocates memory for ACL data. 3246 * On successful return, the calling function is responsible to free the 3247 * ACL buffer returned by this function. 3248 */ 3249 static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy, 3250 struct genl_info *info) 3251 { 3252 enum nl80211_acl_policy acl_policy; 3253 struct nlattr *attr; 3254 struct cfg80211_acl_data *acl; 3255 int i = 0, n_entries, tmp; 3256 3257 if (!wiphy->max_acl_mac_addrs) 3258 return ERR_PTR(-EOPNOTSUPP); 3259 3260 if (!info->attrs[NL80211_ATTR_ACL_POLICY]) 3261 return ERR_PTR(-EINVAL); 3262 3263 acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]); 3264 if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED && 3265 acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED) 3266 return ERR_PTR(-EINVAL); 3267 3268 if (!info->attrs[NL80211_ATTR_MAC_ADDRS]) 3269 return ERR_PTR(-EINVAL); 3270 3271 n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]); 3272 if (n_entries < 0) 3273 return ERR_PTR(n_entries); 3274 3275 if (n_entries > wiphy->max_acl_mac_addrs) 3276 return ERR_PTR(-ENOTSUPP); 3277 3278 acl = kzalloc(sizeof(*acl) + (sizeof(struct mac_address) * n_entries), 3279 GFP_KERNEL); 3280 if (!acl) 3281 return ERR_PTR(-ENOMEM); 3282 3283 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) { 3284 memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN); 3285 i++; 3286 } 3287 3288 acl->n_acl_entries = n_entries; 3289 acl->acl_policy = acl_policy; 3290 3291 return acl; 3292 } 3293 3294 static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info) 3295 { 3296 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3297 struct net_device *dev = info->user_ptr[1]; 3298 struct cfg80211_acl_data *acl; 3299 int err; 3300 3301 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 3302 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 3303 return -EOPNOTSUPP; 3304 3305 if (!dev->ieee80211_ptr->beacon_interval) 3306 return -EINVAL; 3307 3308 acl = parse_acl_data(&rdev->wiphy, info); 3309 if (IS_ERR(acl)) 3310 return PTR_ERR(acl); 3311 3312 err = rdev_set_mac_acl(rdev, dev, acl); 3313 3314 kfree(acl); 3315 3316 return err; 3317 } 3318 3319 static int nl80211_parse_beacon(struct nlattr *attrs[], 3320 struct cfg80211_beacon_data *bcn) 3321 { 3322 bool haveinfo = false; 3323 3324 if (!is_valid_ie_attr(attrs[NL80211_ATTR_BEACON_TAIL]) || 3325 !is_valid_ie_attr(attrs[NL80211_ATTR_IE]) || 3326 !is_valid_ie_attr(attrs[NL80211_ATTR_IE_PROBE_RESP]) || 3327 !is_valid_ie_attr(attrs[NL80211_ATTR_IE_ASSOC_RESP])) 3328 return -EINVAL; 3329 3330 memset(bcn, 0, sizeof(*bcn)); 3331 3332 if (attrs[NL80211_ATTR_BEACON_HEAD]) { 3333 bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]); 3334 bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]); 3335 if (!bcn->head_len) 3336 return -EINVAL; 3337 haveinfo = true; 3338 } 3339 3340 if (attrs[NL80211_ATTR_BEACON_TAIL]) { 3341 bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]); 3342 bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]); 3343 haveinfo = true; 3344 } 3345 3346 if (!haveinfo) 3347 return -EINVAL; 3348 3349 if (attrs[NL80211_ATTR_IE]) { 3350 bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]); 3351 bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]); 3352 } 3353 3354 if (attrs[NL80211_ATTR_IE_PROBE_RESP]) { 3355 bcn->proberesp_ies = 3356 nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]); 3357 bcn->proberesp_ies_len = 3358 nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]); 3359 } 3360 3361 if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) { 3362 bcn->assocresp_ies = 3363 nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]); 3364 bcn->assocresp_ies_len = 3365 nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]); 3366 } 3367 3368 if (attrs[NL80211_ATTR_PROBE_RESP]) { 3369 bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]); 3370 bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]); 3371 } 3372 3373 return 0; 3374 } 3375 3376 static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev, 3377 struct cfg80211_ap_settings *params) 3378 { 3379 struct wireless_dev *wdev; 3380 bool ret = false; 3381 3382 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { 3383 if (wdev->iftype != NL80211_IFTYPE_AP && 3384 wdev->iftype != NL80211_IFTYPE_P2P_GO) 3385 continue; 3386 3387 if (!wdev->preset_chandef.chan) 3388 continue; 3389 3390 params->chandef = wdev->preset_chandef; 3391 ret = true; 3392 break; 3393 } 3394 3395 return ret; 3396 } 3397 3398 static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev, 3399 enum nl80211_auth_type auth_type, 3400 enum nl80211_commands cmd) 3401 { 3402 if (auth_type > NL80211_AUTHTYPE_MAX) 3403 return false; 3404 3405 switch (cmd) { 3406 case NL80211_CMD_AUTHENTICATE: 3407 if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) && 3408 auth_type == NL80211_AUTHTYPE_SAE) 3409 return false; 3410 return true; 3411 case NL80211_CMD_CONNECT: 3412 case NL80211_CMD_START_AP: 3413 /* SAE not supported yet */ 3414 if (auth_type == NL80211_AUTHTYPE_SAE) 3415 return false; 3416 return true; 3417 default: 3418 return false; 3419 } 3420 } 3421 3422 static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info) 3423 { 3424 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3425 struct net_device *dev = info->user_ptr[1]; 3426 struct wireless_dev *wdev = dev->ieee80211_ptr; 3427 struct cfg80211_ap_settings params; 3428 int err; 3429 3430 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 3431 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 3432 return -EOPNOTSUPP; 3433 3434 if (!rdev->ops->start_ap) 3435 return -EOPNOTSUPP; 3436 3437 if (wdev->beacon_interval) 3438 return -EALREADY; 3439 3440 memset(¶ms, 0, sizeof(params)); 3441 3442 /* these are required for START_AP */ 3443 if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] || 3444 !info->attrs[NL80211_ATTR_DTIM_PERIOD] || 3445 !info->attrs[NL80211_ATTR_BEACON_HEAD]) 3446 return -EINVAL; 3447 3448 err = nl80211_parse_beacon(info->attrs, ¶ms.beacon); 3449 if (err) 3450 return err; 3451 3452 params.beacon_interval = 3453 nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]); 3454 params.dtim_period = 3455 nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]); 3456 3457 err = cfg80211_validate_beacon_int(rdev, params.beacon_interval); 3458 if (err) 3459 return err; 3460 3461 /* 3462 * In theory, some of these attributes should be required here 3463 * but since they were not used when the command was originally 3464 * added, keep them optional for old user space programs to let 3465 * them continue to work with drivers that do not need the 3466 * additional information -- drivers must check! 3467 */ 3468 if (info->attrs[NL80211_ATTR_SSID]) { 3469 params.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]); 3470 params.ssid_len = 3471 nla_len(info->attrs[NL80211_ATTR_SSID]); 3472 if (params.ssid_len == 0 || 3473 params.ssid_len > IEEE80211_MAX_SSID_LEN) 3474 return -EINVAL; 3475 } 3476 3477 if (info->attrs[NL80211_ATTR_HIDDEN_SSID]) { 3478 params.hidden_ssid = nla_get_u32( 3479 info->attrs[NL80211_ATTR_HIDDEN_SSID]); 3480 if (params.hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE && 3481 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_LEN && 3482 params.hidden_ssid != NL80211_HIDDEN_SSID_ZERO_CONTENTS) 3483 return -EINVAL; 3484 } 3485 3486 params.privacy = !!info->attrs[NL80211_ATTR_PRIVACY]; 3487 3488 if (info->attrs[NL80211_ATTR_AUTH_TYPE]) { 3489 params.auth_type = nla_get_u32( 3490 info->attrs[NL80211_ATTR_AUTH_TYPE]); 3491 if (!nl80211_valid_auth_type(rdev, params.auth_type, 3492 NL80211_CMD_START_AP)) 3493 return -EINVAL; 3494 } else 3495 params.auth_type = NL80211_AUTHTYPE_AUTOMATIC; 3496 3497 err = nl80211_crypto_settings(rdev, info, ¶ms.crypto, 3498 NL80211_MAX_NR_CIPHER_SUITES); 3499 if (err) 3500 return err; 3501 3502 if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) { 3503 if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER)) 3504 return -EOPNOTSUPP; 3505 params.inactivity_timeout = nla_get_u16( 3506 info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]); 3507 } 3508 3509 if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) { 3510 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 3511 return -EINVAL; 3512 params.p2p_ctwindow = 3513 nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]); 3514 if (params.p2p_ctwindow > 127) 3515 return -EINVAL; 3516 if (params.p2p_ctwindow != 0 && 3517 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)) 3518 return -EINVAL; 3519 } 3520 3521 if (info->attrs[NL80211_ATTR_P2P_OPPPS]) { 3522 u8 tmp; 3523 3524 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 3525 return -EINVAL; 3526 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]); 3527 if (tmp > 1) 3528 return -EINVAL; 3529 params.p2p_opp_ps = tmp; 3530 if (params.p2p_opp_ps != 0 && 3531 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)) 3532 return -EINVAL; 3533 } 3534 3535 if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { 3536 err = nl80211_parse_chandef(rdev, info, ¶ms.chandef); 3537 if (err) 3538 return err; 3539 } else if (wdev->preset_chandef.chan) { 3540 params.chandef = wdev->preset_chandef; 3541 } else if (!nl80211_get_ap_channel(rdev, ¶ms)) 3542 return -EINVAL; 3543 3544 if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, ¶ms.chandef, 3545 wdev->iftype)) 3546 return -EINVAL; 3547 3548 if (info->attrs[NL80211_ATTR_SMPS_MODE]) { 3549 params.smps_mode = 3550 nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]); 3551 switch (params.smps_mode) { 3552 case NL80211_SMPS_OFF: 3553 break; 3554 case NL80211_SMPS_STATIC: 3555 if (!(rdev->wiphy.features & 3556 NL80211_FEATURE_STATIC_SMPS)) 3557 return -EINVAL; 3558 break; 3559 case NL80211_SMPS_DYNAMIC: 3560 if (!(rdev->wiphy.features & 3561 NL80211_FEATURE_DYNAMIC_SMPS)) 3562 return -EINVAL; 3563 break; 3564 default: 3565 return -EINVAL; 3566 } 3567 } else { 3568 params.smps_mode = NL80211_SMPS_OFF; 3569 } 3570 3571 params.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]); 3572 if (params.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) 3573 return -EOPNOTSUPP; 3574 3575 if (info->attrs[NL80211_ATTR_ACL_POLICY]) { 3576 params.acl = parse_acl_data(&rdev->wiphy, info); 3577 if (IS_ERR(params.acl)) 3578 return PTR_ERR(params.acl); 3579 } 3580 3581 wdev_lock(wdev); 3582 err = rdev_start_ap(rdev, dev, ¶ms); 3583 if (!err) { 3584 wdev->preset_chandef = params.chandef; 3585 wdev->beacon_interval = params.beacon_interval; 3586 wdev->chandef = params.chandef; 3587 wdev->ssid_len = params.ssid_len; 3588 memcpy(wdev->ssid, params.ssid, wdev->ssid_len); 3589 } 3590 wdev_unlock(wdev); 3591 3592 kfree(params.acl); 3593 3594 return err; 3595 } 3596 3597 static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info) 3598 { 3599 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3600 struct net_device *dev = info->user_ptr[1]; 3601 struct wireless_dev *wdev = dev->ieee80211_ptr; 3602 struct cfg80211_beacon_data params; 3603 int err; 3604 3605 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 3606 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 3607 return -EOPNOTSUPP; 3608 3609 if (!rdev->ops->change_beacon) 3610 return -EOPNOTSUPP; 3611 3612 if (!wdev->beacon_interval) 3613 return -EINVAL; 3614 3615 err = nl80211_parse_beacon(info->attrs, ¶ms); 3616 if (err) 3617 return err; 3618 3619 wdev_lock(wdev); 3620 err = rdev_change_beacon(rdev, dev, ¶ms); 3621 wdev_unlock(wdev); 3622 3623 return err; 3624 } 3625 3626 static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info) 3627 { 3628 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 3629 struct net_device *dev = info->user_ptr[1]; 3630 3631 return cfg80211_stop_ap(rdev, dev, false); 3632 } 3633 3634 static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = { 3635 [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG }, 3636 [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG }, 3637 [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG }, 3638 [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG }, 3639 [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG }, 3640 [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG }, 3641 }; 3642 3643 static int parse_station_flags(struct genl_info *info, 3644 enum nl80211_iftype iftype, 3645 struct station_parameters *params) 3646 { 3647 struct nlattr *flags[NL80211_STA_FLAG_MAX + 1]; 3648 struct nlattr *nla; 3649 int flag; 3650 3651 /* 3652 * Try parsing the new attribute first so userspace 3653 * can specify both for older kernels. 3654 */ 3655 nla = info->attrs[NL80211_ATTR_STA_FLAGS2]; 3656 if (nla) { 3657 struct nl80211_sta_flag_update *sta_flags; 3658 3659 sta_flags = nla_data(nla); 3660 params->sta_flags_mask = sta_flags->mask; 3661 params->sta_flags_set = sta_flags->set; 3662 params->sta_flags_set &= params->sta_flags_mask; 3663 if ((params->sta_flags_mask | 3664 params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID)) 3665 return -EINVAL; 3666 return 0; 3667 } 3668 3669 /* if present, parse the old attribute */ 3670 3671 nla = info->attrs[NL80211_ATTR_STA_FLAGS]; 3672 if (!nla) 3673 return 0; 3674 3675 if (nla_parse_nested(flags, NL80211_STA_FLAG_MAX, 3676 nla, sta_flags_policy)) 3677 return -EINVAL; 3678 3679 /* 3680 * Only allow certain flags for interface types so that 3681 * other attributes are silently ignored. Remember that 3682 * this is backward compatibility code with old userspace 3683 * and shouldn't be hit in other cases anyway. 3684 */ 3685 switch (iftype) { 3686 case NL80211_IFTYPE_AP: 3687 case NL80211_IFTYPE_AP_VLAN: 3688 case NL80211_IFTYPE_P2P_GO: 3689 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 3690 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 3691 BIT(NL80211_STA_FLAG_WME) | 3692 BIT(NL80211_STA_FLAG_MFP); 3693 break; 3694 case NL80211_IFTYPE_P2P_CLIENT: 3695 case NL80211_IFTYPE_STATION: 3696 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) | 3697 BIT(NL80211_STA_FLAG_TDLS_PEER); 3698 break; 3699 case NL80211_IFTYPE_MESH_POINT: 3700 params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) | 3701 BIT(NL80211_STA_FLAG_MFP) | 3702 BIT(NL80211_STA_FLAG_AUTHORIZED); 3703 default: 3704 return -EINVAL; 3705 } 3706 3707 for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) { 3708 if (flags[flag]) { 3709 params->sta_flags_set |= (1<<flag); 3710 3711 /* no longer support new API additions in old API */ 3712 if (flag > NL80211_STA_FLAG_MAX_OLD_API) 3713 return -EINVAL; 3714 } 3715 } 3716 3717 return 0; 3718 } 3719 3720 static bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info, 3721 int attr) 3722 { 3723 struct nlattr *rate; 3724 u32 bitrate; 3725 u16 bitrate_compat; 3726 enum nl80211_attrs rate_flg; 3727 3728 rate = nla_nest_start(msg, attr); 3729 if (!rate) 3730 return false; 3731 3732 /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */ 3733 bitrate = cfg80211_calculate_bitrate(info); 3734 /* report 16-bit bitrate only if we can */ 3735 bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0; 3736 if (bitrate > 0 && 3737 nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate)) 3738 return false; 3739 if (bitrate_compat > 0 && 3740 nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat)) 3741 return false; 3742 3743 switch (info->bw) { 3744 case RATE_INFO_BW_5: 3745 rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH; 3746 break; 3747 case RATE_INFO_BW_10: 3748 rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH; 3749 break; 3750 default: 3751 WARN_ON(1); 3752 /* fall through */ 3753 case RATE_INFO_BW_20: 3754 rate_flg = 0; 3755 break; 3756 case RATE_INFO_BW_40: 3757 rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH; 3758 break; 3759 case RATE_INFO_BW_80: 3760 rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH; 3761 break; 3762 case RATE_INFO_BW_160: 3763 rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH; 3764 break; 3765 } 3766 3767 if (rate_flg && nla_put_flag(msg, rate_flg)) 3768 return false; 3769 3770 if (info->flags & RATE_INFO_FLAGS_MCS) { 3771 if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs)) 3772 return false; 3773 if (info->flags & RATE_INFO_FLAGS_SHORT_GI && 3774 nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)) 3775 return false; 3776 } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) { 3777 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs)) 3778 return false; 3779 if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss)) 3780 return false; 3781 if (info->flags & RATE_INFO_FLAGS_SHORT_GI && 3782 nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI)) 3783 return false; 3784 } 3785 3786 nla_nest_end(msg, rate); 3787 return true; 3788 } 3789 3790 static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal, 3791 int id) 3792 { 3793 void *attr; 3794 int i = 0; 3795 3796 if (!mask) 3797 return true; 3798 3799 attr = nla_nest_start(msg, id); 3800 if (!attr) 3801 return false; 3802 3803 for (i = 0; i < IEEE80211_MAX_CHAINS; i++) { 3804 if (!(mask & BIT(i))) 3805 continue; 3806 3807 if (nla_put_u8(msg, i, signal[i])) 3808 return false; 3809 } 3810 3811 nla_nest_end(msg, attr); 3812 3813 return true; 3814 } 3815 3816 static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid, 3817 u32 seq, int flags, 3818 struct cfg80211_registered_device *rdev, 3819 struct net_device *dev, 3820 const u8 *mac_addr, struct station_info *sinfo) 3821 { 3822 void *hdr; 3823 struct nlattr *sinfoattr, *bss_param; 3824 3825 hdr = nl80211hdr_put(msg, portid, seq, flags, cmd); 3826 if (!hdr) 3827 return -1; 3828 3829 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) || 3830 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) || 3831 nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation)) 3832 goto nla_put_failure; 3833 3834 sinfoattr = nla_nest_start(msg, NL80211_ATTR_STA_INFO); 3835 if (!sinfoattr) 3836 goto nla_put_failure; 3837 3838 #define PUT_SINFO(attr, memb, type) do { \ 3839 BUILD_BUG_ON(sizeof(type) == sizeof(u64)); \ 3840 if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) && \ 3841 nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr, \ 3842 sinfo->memb)) \ 3843 goto nla_put_failure; \ 3844 } while (0) 3845 #define PUT_SINFO_U64(attr, memb) do { \ 3846 if (sinfo->filled & (1ULL << NL80211_STA_INFO_ ## attr) && \ 3847 nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr, \ 3848 sinfo->memb, NL80211_STA_INFO_PAD)) \ 3849 goto nla_put_failure; \ 3850 } while (0) 3851 3852 PUT_SINFO(CONNECTED_TIME, connected_time, u32); 3853 PUT_SINFO(INACTIVE_TIME, inactive_time, u32); 3854 3855 if (sinfo->filled & (BIT(NL80211_STA_INFO_RX_BYTES) | 3856 BIT(NL80211_STA_INFO_RX_BYTES64)) && 3857 nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES, 3858 (u32)sinfo->rx_bytes)) 3859 goto nla_put_failure; 3860 3861 if (sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES) | 3862 BIT(NL80211_STA_INFO_TX_BYTES64)) && 3863 nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES, 3864 (u32)sinfo->tx_bytes)) 3865 goto nla_put_failure; 3866 3867 PUT_SINFO_U64(RX_BYTES64, rx_bytes); 3868 PUT_SINFO_U64(TX_BYTES64, tx_bytes); 3869 PUT_SINFO(LLID, llid, u16); 3870 PUT_SINFO(PLID, plid, u16); 3871 PUT_SINFO(PLINK_STATE, plink_state, u8); 3872 PUT_SINFO_U64(RX_DURATION, rx_duration); 3873 3874 switch (rdev->wiphy.signal_type) { 3875 case CFG80211_SIGNAL_TYPE_MBM: 3876 PUT_SINFO(SIGNAL, signal, u8); 3877 PUT_SINFO(SIGNAL_AVG, signal_avg, u8); 3878 break; 3879 default: 3880 break; 3881 } 3882 if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL)) { 3883 if (!nl80211_put_signal(msg, sinfo->chains, 3884 sinfo->chain_signal, 3885 NL80211_STA_INFO_CHAIN_SIGNAL)) 3886 goto nla_put_failure; 3887 } 3888 if (sinfo->filled & BIT(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) { 3889 if (!nl80211_put_signal(msg, sinfo->chains, 3890 sinfo->chain_signal_avg, 3891 NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) 3892 goto nla_put_failure; 3893 } 3894 if (sinfo->filled & BIT(NL80211_STA_INFO_TX_BITRATE)) { 3895 if (!nl80211_put_sta_rate(msg, &sinfo->txrate, 3896 NL80211_STA_INFO_TX_BITRATE)) 3897 goto nla_put_failure; 3898 } 3899 if (sinfo->filled & BIT(NL80211_STA_INFO_RX_BITRATE)) { 3900 if (!nl80211_put_sta_rate(msg, &sinfo->rxrate, 3901 NL80211_STA_INFO_RX_BITRATE)) 3902 goto nla_put_failure; 3903 } 3904 3905 PUT_SINFO(RX_PACKETS, rx_packets, u32); 3906 PUT_SINFO(TX_PACKETS, tx_packets, u32); 3907 PUT_SINFO(TX_RETRIES, tx_retries, u32); 3908 PUT_SINFO(TX_FAILED, tx_failed, u32); 3909 PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32); 3910 PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32); 3911 PUT_SINFO(LOCAL_PM, local_pm, u32); 3912 PUT_SINFO(PEER_PM, peer_pm, u32); 3913 PUT_SINFO(NONPEER_PM, nonpeer_pm, u32); 3914 3915 if (sinfo->filled & BIT(NL80211_STA_INFO_BSS_PARAM)) { 3916 bss_param = nla_nest_start(msg, NL80211_STA_INFO_BSS_PARAM); 3917 if (!bss_param) 3918 goto nla_put_failure; 3919 3920 if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) && 3921 nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) || 3922 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) && 3923 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) || 3924 ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) && 3925 nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) || 3926 nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD, 3927 sinfo->bss_param.dtim_period) || 3928 nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL, 3929 sinfo->bss_param.beacon_interval)) 3930 goto nla_put_failure; 3931 3932 nla_nest_end(msg, bss_param); 3933 } 3934 if ((sinfo->filled & BIT(NL80211_STA_INFO_STA_FLAGS)) && 3935 nla_put(msg, NL80211_STA_INFO_STA_FLAGS, 3936 sizeof(struct nl80211_sta_flag_update), 3937 &sinfo->sta_flags)) 3938 goto nla_put_failure; 3939 3940 PUT_SINFO_U64(T_OFFSET, t_offset); 3941 PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc); 3942 PUT_SINFO_U64(BEACON_RX, rx_beacon); 3943 PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8); 3944 3945 #undef PUT_SINFO 3946 #undef PUT_SINFO_U64 3947 3948 if (sinfo->filled & BIT(NL80211_STA_INFO_TID_STATS)) { 3949 struct nlattr *tidsattr; 3950 int tid; 3951 3952 tidsattr = nla_nest_start(msg, NL80211_STA_INFO_TID_STATS); 3953 if (!tidsattr) 3954 goto nla_put_failure; 3955 3956 for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) { 3957 struct cfg80211_tid_stats *tidstats; 3958 struct nlattr *tidattr; 3959 3960 tidstats = &sinfo->pertid[tid]; 3961 3962 if (!tidstats->filled) 3963 continue; 3964 3965 tidattr = nla_nest_start(msg, tid + 1); 3966 if (!tidattr) 3967 goto nla_put_failure; 3968 3969 #define PUT_TIDVAL_U64(attr, memb) do { \ 3970 if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) && \ 3971 nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr, \ 3972 tidstats->memb, NL80211_TID_STATS_PAD)) \ 3973 goto nla_put_failure; \ 3974 } while (0) 3975 3976 PUT_TIDVAL_U64(RX_MSDU, rx_msdu); 3977 PUT_TIDVAL_U64(TX_MSDU, tx_msdu); 3978 PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries); 3979 PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed); 3980 3981 #undef PUT_TIDVAL_U64 3982 nla_nest_end(msg, tidattr); 3983 } 3984 3985 nla_nest_end(msg, tidsattr); 3986 } 3987 3988 nla_nest_end(msg, sinfoattr); 3989 3990 if (sinfo->assoc_req_ies_len && 3991 nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len, 3992 sinfo->assoc_req_ies)) 3993 goto nla_put_failure; 3994 3995 genlmsg_end(msg, hdr); 3996 return 0; 3997 3998 nla_put_failure: 3999 genlmsg_cancel(msg, hdr); 4000 return -EMSGSIZE; 4001 } 4002 4003 static int nl80211_dump_station(struct sk_buff *skb, 4004 struct netlink_callback *cb) 4005 { 4006 struct station_info sinfo; 4007 struct cfg80211_registered_device *rdev; 4008 struct wireless_dev *wdev; 4009 u8 mac_addr[ETH_ALEN]; 4010 int sta_idx = cb->args[2]; 4011 int err; 4012 4013 err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev); 4014 if (err) 4015 return err; 4016 4017 if (!wdev->netdev) { 4018 err = -EINVAL; 4019 goto out_err; 4020 } 4021 4022 if (!rdev->ops->dump_station) { 4023 err = -EOPNOTSUPP; 4024 goto out_err; 4025 } 4026 4027 while (1) { 4028 memset(&sinfo, 0, sizeof(sinfo)); 4029 err = rdev_dump_station(rdev, wdev->netdev, sta_idx, 4030 mac_addr, &sinfo); 4031 if (err == -ENOENT) 4032 break; 4033 if (err) 4034 goto out_err; 4035 4036 if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION, 4037 NETLINK_CB(cb->skb).portid, 4038 cb->nlh->nlmsg_seq, NLM_F_MULTI, 4039 rdev, wdev->netdev, mac_addr, 4040 &sinfo) < 0) 4041 goto out; 4042 4043 sta_idx++; 4044 } 4045 4046 out: 4047 cb->args[2] = sta_idx; 4048 err = skb->len; 4049 out_err: 4050 nl80211_finish_wdev_dump(rdev); 4051 4052 return err; 4053 } 4054 4055 static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info) 4056 { 4057 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4058 struct net_device *dev = info->user_ptr[1]; 4059 struct station_info sinfo; 4060 struct sk_buff *msg; 4061 u8 *mac_addr = NULL; 4062 int err; 4063 4064 memset(&sinfo, 0, sizeof(sinfo)); 4065 4066 if (!info->attrs[NL80211_ATTR_MAC]) 4067 return -EINVAL; 4068 4069 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 4070 4071 if (!rdev->ops->get_station) 4072 return -EOPNOTSUPP; 4073 4074 err = rdev_get_station(rdev, dev, mac_addr, &sinfo); 4075 if (err) 4076 return err; 4077 4078 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4079 if (!msg) 4080 return -ENOMEM; 4081 4082 if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 4083 info->snd_portid, info->snd_seq, 0, 4084 rdev, dev, mac_addr, &sinfo) < 0) { 4085 nlmsg_free(msg); 4086 return -ENOBUFS; 4087 } 4088 4089 return genlmsg_reply(msg, info); 4090 } 4091 4092 int cfg80211_check_station_change(struct wiphy *wiphy, 4093 struct station_parameters *params, 4094 enum cfg80211_station_type statype) 4095 { 4096 if (params->listen_interval != -1 && 4097 statype != CFG80211_STA_AP_CLIENT_UNASSOC) 4098 return -EINVAL; 4099 4100 if (params->support_p2p_ps != -1 && 4101 statype != CFG80211_STA_AP_CLIENT_UNASSOC) 4102 return -EINVAL; 4103 4104 if (params->aid && 4105 !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) && 4106 statype != CFG80211_STA_AP_CLIENT_UNASSOC) 4107 return -EINVAL; 4108 4109 /* When you run into this, adjust the code below for the new flag */ 4110 BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7); 4111 4112 switch (statype) { 4113 case CFG80211_STA_MESH_PEER_KERNEL: 4114 case CFG80211_STA_MESH_PEER_USER: 4115 /* 4116 * No ignoring the TDLS flag here -- the userspace mesh 4117 * code doesn't have the bug of including TDLS in the 4118 * mask everywhere. 4119 */ 4120 if (params->sta_flags_mask & 4121 ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) | 4122 BIT(NL80211_STA_FLAG_MFP) | 4123 BIT(NL80211_STA_FLAG_AUTHORIZED))) 4124 return -EINVAL; 4125 break; 4126 case CFG80211_STA_TDLS_PEER_SETUP: 4127 case CFG80211_STA_TDLS_PEER_ACTIVE: 4128 if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) 4129 return -EINVAL; 4130 /* ignore since it can't change */ 4131 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER); 4132 break; 4133 default: 4134 /* disallow mesh-specific things */ 4135 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION) 4136 return -EINVAL; 4137 if (params->local_pm) 4138 return -EINVAL; 4139 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) 4140 return -EINVAL; 4141 } 4142 4143 if (statype != CFG80211_STA_TDLS_PEER_SETUP && 4144 statype != CFG80211_STA_TDLS_PEER_ACTIVE) { 4145 /* TDLS can't be set, ... */ 4146 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) 4147 return -EINVAL; 4148 /* 4149 * ... but don't bother the driver with it. This works around 4150 * a hostapd/wpa_supplicant issue -- it always includes the 4151 * TLDS_PEER flag in the mask even for AP mode. 4152 */ 4153 params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER); 4154 } 4155 4156 if (statype != CFG80211_STA_TDLS_PEER_SETUP && 4157 statype != CFG80211_STA_AP_CLIENT_UNASSOC) { 4158 /* reject other things that can't change */ 4159 if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) 4160 return -EINVAL; 4161 if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY) 4162 return -EINVAL; 4163 if (params->supported_rates) 4164 return -EINVAL; 4165 if (params->ext_capab || params->ht_capa || params->vht_capa) 4166 return -EINVAL; 4167 } 4168 4169 if (statype != CFG80211_STA_AP_CLIENT && 4170 statype != CFG80211_STA_AP_CLIENT_UNASSOC) { 4171 if (params->vlan) 4172 return -EINVAL; 4173 } 4174 4175 switch (statype) { 4176 case CFG80211_STA_AP_MLME_CLIENT: 4177 /* Use this only for authorizing/unauthorizing a station */ 4178 if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED))) 4179 return -EOPNOTSUPP; 4180 break; 4181 case CFG80211_STA_AP_CLIENT: 4182 case CFG80211_STA_AP_CLIENT_UNASSOC: 4183 /* accept only the listed bits */ 4184 if (params->sta_flags_mask & 4185 ~(BIT(NL80211_STA_FLAG_AUTHORIZED) | 4186 BIT(NL80211_STA_FLAG_AUTHENTICATED) | 4187 BIT(NL80211_STA_FLAG_ASSOCIATED) | 4188 BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) | 4189 BIT(NL80211_STA_FLAG_WME) | 4190 BIT(NL80211_STA_FLAG_MFP))) 4191 return -EINVAL; 4192 4193 /* but authenticated/associated only if driver handles it */ 4194 if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) && 4195 params->sta_flags_mask & 4196 (BIT(NL80211_STA_FLAG_AUTHENTICATED) | 4197 BIT(NL80211_STA_FLAG_ASSOCIATED))) 4198 return -EINVAL; 4199 break; 4200 case CFG80211_STA_IBSS: 4201 case CFG80211_STA_AP_STA: 4202 /* reject any changes other than AUTHORIZED */ 4203 if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED)) 4204 return -EINVAL; 4205 break; 4206 case CFG80211_STA_TDLS_PEER_SETUP: 4207 /* reject any changes other than AUTHORIZED or WME */ 4208 if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) | 4209 BIT(NL80211_STA_FLAG_WME))) 4210 return -EINVAL; 4211 /* force (at least) rates when authorizing */ 4212 if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) && 4213 !params->supported_rates) 4214 return -EINVAL; 4215 break; 4216 case CFG80211_STA_TDLS_PEER_ACTIVE: 4217 /* reject any changes */ 4218 return -EINVAL; 4219 case CFG80211_STA_MESH_PEER_KERNEL: 4220 if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE) 4221 return -EINVAL; 4222 break; 4223 case CFG80211_STA_MESH_PEER_USER: 4224 if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION && 4225 params->plink_action != NL80211_PLINK_ACTION_BLOCK) 4226 return -EINVAL; 4227 break; 4228 } 4229 4230 return 0; 4231 } 4232 EXPORT_SYMBOL(cfg80211_check_station_change); 4233 4234 /* 4235 * Get vlan interface making sure it is running and on the right wiphy. 4236 */ 4237 static struct net_device *get_vlan(struct genl_info *info, 4238 struct cfg80211_registered_device *rdev) 4239 { 4240 struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN]; 4241 struct net_device *v; 4242 int ret; 4243 4244 if (!vlanattr) 4245 return NULL; 4246 4247 v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr)); 4248 if (!v) 4249 return ERR_PTR(-ENODEV); 4250 4251 if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) { 4252 ret = -EINVAL; 4253 goto error; 4254 } 4255 4256 if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4257 v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4258 v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) { 4259 ret = -EINVAL; 4260 goto error; 4261 } 4262 4263 if (!netif_running(v)) { 4264 ret = -ENETDOWN; 4265 goto error; 4266 } 4267 4268 return v; 4269 error: 4270 dev_put(v); 4271 return ERR_PTR(ret); 4272 } 4273 4274 static const struct nla_policy 4275 nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = { 4276 [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 }, 4277 [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 }, 4278 }; 4279 4280 static int nl80211_parse_sta_wme(struct genl_info *info, 4281 struct station_parameters *params) 4282 { 4283 struct nlattr *tb[NL80211_STA_WME_MAX + 1]; 4284 struct nlattr *nla; 4285 int err; 4286 4287 /* parse WME attributes if present */ 4288 if (!info->attrs[NL80211_ATTR_STA_WME]) 4289 return 0; 4290 4291 nla = info->attrs[NL80211_ATTR_STA_WME]; 4292 err = nla_parse_nested(tb, NL80211_STA_WME_MAX, nla, 4293 nl80211_sta_wme_policy); 4294 if (err) 4295 return err; 4296 4297 if (tb[NL80211_STA_WME_UAPSD_QUEUES]) 4298 params->uapsd_queues = nla_get_u8( 4299 tb[NL80211_STA_WME_UAPSD_QUEUES]); 4300 if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) 4301 return -EINVAL; 4302 4303 if (tb[NL80211_STA_WME_MAX_SP]) 4304 params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]); 4305 4306 if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK) 4307 return -EINVAL; 4308 4309 params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD; 4310 4311 return 0; 4312 } 4313 4314 static int nl80211_parse_sta_channel_info(struct genl_info *info, 4315 struct station_parameters *params) 4316 { 4317 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) { 4318 params->supported_channels = 4319 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]); 4320 params->supported_channels_len = 4321 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]); 4322 /* 4323 * Need to include at least one (first channel, number of 4324 * channels) tuple for each subband, and must have proper 4325 * tuples for the rest of the data as well. 4326 */ 4327 if (params->supported_channels_len < 2) 4328 return -EINVAL; 4329 if (params->supported_channels_len % 2) 4330 return -EINVAL; 4331 } 4332 4333 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) { 4334 params->supported_oper_classes = 4335 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]); 4336 params->supported_oper_classes_len = 4337 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]); 4338 /* 4339 * The value of the Length field of the Supported Operating 4340 * Classes element is between 2 and 253. 4341 */ 4342 if (params->supported_oper_classes_len < 2 || 4343 params->supported_oper_classes_len > 253) 4344 return -EINVAL; 4345 } 4346 return 0; 4347 } 4348 4349 static int nl80211_set_station_tdls(struct genl_info *info, 4350 struct station_parameters *params) 4351 { 4352 int err; 4353 /* Dummy STA entry gets updated once the peer capabilities are known */ 4354 if (info->attrs[NL80211_ATTR_PEER_AID]) 4355 params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]); 4356 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) 4357 params->ht_capa = 4358 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); 4359 if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) 4360 params->vht_capa = 4361 nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]); 4362 4363 err = nl80211_parse_sta_channel_info(info, params); 4364 if (err) 4365 return err; 4366 4367 return nl80211_parse_sta_wme(info, params); 4368 } 4369 4370 static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) 4371 { 4372 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4373 struct net_device *dev = info->user_ptr[1]; 4374 struct station_parameters params; 4375 u8 *mac_addr; 4376 int err; 4377 4378 memset(¶ms, 0, sizeof(params)); 4379 4380 if (!rdev->ops->change_station) 4381 return -EOPNOTSUPP; 4382 4383 /* 4384 * AID and listen_interval properties can be set only for unassociated 4385 * station. Include these parameters here and will check them in 4386 * cfg80211_check_station_change(). 4387 */ 4388 if (info->attrs[NL80211_ATTR_STA_AID]) 4389 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); 4390 4391 if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) 4392 params.listen_interval = 4393 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); 4394 else 4395 params.listen_interval = -1; 4396 4397 if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) { 4398 u8 tmp; 4399 4400 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]); 4401 if (tmp >= NUM_NL80211_P2P_PS_STATUS) 4402 return -EINVAL; 4403 4404 params.support_p2p_ps = tmp; 4405 } else { 4406 params.support_p2p_ps = -1; 4407 } 4408 4409 if (!info->attrs[NL80211_ATTR_MAC]) 4410 return -EINVAL; 4411 4412 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 4413 4414 if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) { 4415 params.supported_rates = 4416 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 4417 params.supported_rates_len = 4418 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 4419 } 4420 4421 if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) { 4422 params.capability = 4423 nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]); 4424 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY; 4425 } 4426 4427 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) { 4428 params.ext_capab = 4429 nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]); 4430 params.ext_capab_len = 4431 nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]); 4432 } 4433 4434 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, ¶ms)) 4435 return -EINVAL; 4436 4437 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) { 4438 params.plink_action = 4439 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); 4440 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS) 4441 return -EINVAL; 4442 } 4443 4444 if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) { 4445 params.plink_state = 4446 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]); 4447 if (params.plink_state >= NUM_NL80211_PLINK_STATES) 4448 return -EINVAL; 4449 if (info->attrs[NL80211_ATTR_MESH_PEER_AID]) { 4450 params.peer_aid = nla_get_u16( 4451 info->attrs[NL80211_ATTR_MESH_PEER_AID]); 4452 if (params.peer_aid > IEEE80211_MAX_AID) 4453 return -EINVAL; 4454 } 4455 params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE; 4456 } 4457 4458 if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]) { 4459 enum nl80211_mesh_power_mode pm = nla_get_u32( 4460 info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]); 4461 4462 if (pm <= NL80211_MESH_POWER_UNKNOWN || 4463 pm > NL80211_MESH_POWER_MAX) 4464 return -EINVAL; 4465 4466 params.local_pm = pm; 4467 } 4468 4469 /* Include parameters for TDLS peer (will check later) */ 4470 err = nl80211_set_station_tdls(info, ¶ms); 4471 if (err) 4472 return err; 4473 4474 params.vlan = get_vlan(info, rdev); 4475 if (IS_ERR(params.vlan)) 4476 return PTR_ERR(params.vlan); 4477 4478 switch (dev->ieee80211_ptr->iftype) { 4479 case NL80211_IFTYPE_AP: 4480 case NL80211_IFTYPE_AP_VLAN: 4481 case NL80211_IFTYPE_P2P_GO: 4482 case NL80211_IFTYPE_P2P_CLIENT: 4483 case NL80211_IFTYPE_STATION: 4484 case NL80211_IFTYPE_ADHOC: 4485 case NL80211_IFTYPE_MESH_POINT: 4486 break; 4487 default: 4488 err = -EOPNOTSUPP; 4489 goto out_put_vlan; 4490 } 4491 4492 /* driver will call cfg80211_check_station_change() */ 4493 err = rdev_change_station(rdev, dev, mac_addr, ¶ms); 4494 4495 out_put_vlan: 4496 if (params.vlan) 4497 dev_put(params.vlan); 4498 4499 return err; 4500 } 4501 4502 static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) 4503 { 4504 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4505 int err; 4506 struct net_device *dev = info->user_ptr[1]; 4507 struct station_parameters params; 4508 u8 *mac_addr = NULL; 4509 u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) | 4510 BIT(NL80211_STA_FLAG_ASSOCIATED); 4511 4512 memset(¶ms, 0, sizeof(params)); 4513 4514 if (!rdev->ops->add_station) 4515 return -EOPNOTSUPP; 4516 4517 if (!info->attrs[NL80211_ATTR_MAC]) 4518 return -EINVAL; 4519 4520 if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) 4521 return -EINVAL; 4522 4523 if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) 4524 return -EINVAL; 4525 4526 if (!info->attrs[NL80211_ATTR_STA_AID] && 4527 !info->attrs[NL80211_ATTR_PEER_AID]) 4528 return -EINVAL; 4529 4530 mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]); 4531 params.supported_rates = 4532 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 4533 params.supported_rates_len = 4534 nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]); 4535 params.listen_interval = 4536 nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); 4537 4538 if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) { 4539 u8 tmp; 4540 4541 tmp = nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]); 4542 if (tmp >= NUM_NL80211_P2P_PS_STATUS) 4543 return -EINVAL; 4544 4545 params.support_p2p_ps = tmp; 4546 } else { 4547 /* 4548 * if not specified, assume it's supported for P2P GO interface, 4549 * and is NOT supported for AP interface 4550 */ 4551 params.support_p2p_ps = 4552 dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO; 4553 } 4554 4555 if (info->attrs[NL80211_ATTR_PEER_AID]) 4556 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]); 4557 else 4558 params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); 4559 if (!params.aid || params.aid > IEEE80211_MAX_AID) 4560 return -EINVAL; 4561 4562 if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) { 4563 params.capability = 4564 nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]); 4565 params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY; 4566 } 4567 4568 if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) { 4569 params.ext_capab = 4570 nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]); 4571 params.ext_capab_len = 4572 nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]); 4573 } 4574 4575 if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) 4576 params.ht_capa = 4577 nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]); 4578 4579 if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) 4580 params.vht_capa = 4581 nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]); 4582 4583 if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) { 4584 params.opmode_notif_used = true; 4585 params.opmode_notif = 4586 nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]); 4587 } 4588 4589 if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION]) { 4590 params.plink_action = 4591 nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); 4592 if (params.plink_action >= NUM_NL80211_PLINK_ACTIONS) 4593 return -EINVAL; 4594 } 4595 4596 err = nl80211_parse_sta_channel_info(info, ¶ms); 4597 if (err) 4598 return err; 4599 4600 err = nl80211_parse_sta_wme(info, ¶ms); 4601 if (err) 4602 return err; 4603 4604 if (parse_station_flags(info, dev->ieee80211_ptr->iftype, ¶ms)) 4605 return -EINVAL; 4606 4607 /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT 4608 * as userspace might just pass through the capabilities from the IEs 4609 * directly, rather than enforcing this restriction and returning an 4610 * error in this case. 4611 */ 4612 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) { 4613 params.ht_capa = NULL; 4614 params.vht_capa = NULL; 4615 } 4616 4617 /* When you run into this, adjust the code below for the new flag */ 4618 BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7); 4619 4620 switch (dev->ieee80211_ptr->iftype) { 4621 case NL80211_IFTYPE_AP: 4622 case NL80211_IFTYPE_AP_VLAN: 4623 case NL80211_IFTYPE_P2P_GO: 4624 /* ignore WME attributes if iface/sta is not capable */ 4625 if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) || 4626 !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) 4627 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD; 4628 4629 /* TDLS peers cannot be added */ 4630 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) || 4631 info->attrs[NL80211_ATTR_PEER_AID]) 4632 return -EINVAL; 4633 /* but don't bother the driver with it */ 4634 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER); 4635 4636 /* allow authenticated/associated only if driver handles it */ 4637 if (!(rdev->wiphy.features & 4638 NL80211_FEATURE_FULL_AP_CLIENT_STATE) && 4639 params.sta_flags_mask & auth_assoc) 4640 return -EINVAL; 4641 4642 /* Older userspace, or userspace wanting to be compatible with 4643 * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth 4644 * and assoc flags in the mask, but assumes the station will be 4645 * added as associated anyway since this was the required driver 4646 * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was 4647 * introduced. 4648 * In order to not bother drivers with this quirk in the API 4649 * set the flags in both the mask and set for new stations in 4650 * this case. 4651 */ 4652 if (!(params.sta_flags_mask & auth_assoc)) { 4653 params.sta_flags_mask |= auth_assoc; 4654 params.sta_flags_set |= auth_assoc; 4655 } 4656 4657 /* must be last in here for error handling */ 4658 params.vlan = get_vlan(info, rdev); 4659 if (IS_ERR(params.vlan)) 4660 return PTR_ERR(params.vlan); 4661 break; 4662 case NL80211_IFTYPE_MESH_POINT: 4663 /* ignore uAPSD data */ 4664 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD; 4665 4666 /* associated is disallowed */ 4667 if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED)) 4668 return -EINVAL; 4669 /* TDLS peers cannot be added */ 4670 if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) || 4671 info->attrs[NL80211_ATTR_PEER_AID]) 4672 return -EINVAL; 4673 break; 4674 case NL80211_IFTYPE_STATION: 4675 case NL80211_IFTYPE_P2P_CLIENT: 4676 /* ignore uAPSD data */ 4677 params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD; 4678 4679 /* these are disallowed */ 4680 if (params.sta_flags_mask & 4681 (BIT(NL80211_STA_FLAG_ASSOCIATED) | 4682 BIT(NL80211_STA_FLAG_AUTHENTICATED))) 4683 return -EINVAL; 4684 /* Only TDLS peers can be added */ 4685 if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))) 4686 return -EINVAL; 4687 /* Can only add if TDLS ... */ 4688 if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS)) 4689 return -EOPNOTSUPP; 4690 /* ... with external setup is supported */ 4691 if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP)) 4692 return -EOPNOTSUPP; 4693 /* 4694 * Older wpa_supplicant versions always mark the TDLS peer 4695 * as authorized, but it shouldn't yet be. 4696 */ 4697 params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED); 4698 break; 4699 default: 4700 return -EOPNOTSUPP; 4701 } 4702 4703 /* be aware of params.vlan when changing code here */ 4704 4705 err = rdev_add_station(rdev, dev, mac_addr, ¶ms); 4706 4707 if (params.vlan) 4708 dev_put(params.vlan); 4709 return err; 4710 } 4711 4712 static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info) 4713 { 4714 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4715 struct net_device *dev = info->user_ptr[1]; 4716 struct station_del_parameters params; 4717 4718 memset(¶ms, 0, sizeof(params)); 4719 4720 if (info->attrs[NL80211_ATTR_MAC]) 4721 params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]); 4722 4723 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 4724 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && 4725 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT && 4726 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 4727 return -EINVAL; 4728 4729 if (!rdev->ops->del_station) 4730 return -EOPNOTSUPP; 4731 4732 if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) { 4733 params.subtype = 4734 nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]); 4735 if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 && 4736 params.subtype != IEEE80211_STYPE_DEAUTH >> 4) 4737 return -EINVAL; 4738 } else { 4739 /* Default to Deauthentication frame */ 4740 params.subtype = IEEE80211_STYPE_DEAUTH >> 4; 4741 } 4742 4743 if (info->attrs[NL80211_ATTR_REASON_CODE]) { 4744 params.reason_code = 4745 nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]); 4746 if (params.reason_code == 0) 4747 return -EINVAL; /* 0 is reserved */ 4748 } else { 4749 /* Default to reason code 2 */ 4750 params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID; 4751 } 4752 4753 return rdev_del_station(rdev, dev, ¶ms); 4754 } 4755 4756 static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq, 4757 int flags, struct net_device *dev, 4758 u8 *dst, u8 *next_hop, 4759 struct mpath_info *pinfo) 4760 { 4761 void *hdr; 4762 struct nlattr *pinfoattr; 4763 4764 hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH); 4765 if (!hdr) 4766 return -1; 4767 4768 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) || 4769 nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) || 4770 nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) || 4771 nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation)) 4772 goto nla_put_failure; 4773 4774 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MPATH_INFO); 4775 if (!pinfoattr) 4776 goto nla_put_failure; 4777 if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) && 4778 nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN, 4779 pinfo->frame_qlen)) 4780 goto nla_put_failure; 4781 if (((pinfo->filled & MPATH_INFO_SN) && 4782 nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) || 4783 ((pinfo->filled & MPATH_INFO_METRIC) && 4784 nla_put_u32(msg, NL80211_MPATH_INFO_METRIC, 4785 pinfo->metric)) || 4786 ((pinfo->filled & MPATH_INFO_EXPTIME) && 4787 nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME, 4788 pinfo->exptime)) || 4789 ((pinfo->filled & MPATH_INFO_FLAGS) && 4790 nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS, 4791 pinfo->flags)) || 4792 ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) && 4793 nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT, 4794 pinfo->discovery_timeout)) || 4795 ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) && 4796 nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES, 4797 pinfo->discovery_retries))) 4798 goto nla_put_failure; 4799 4800 nla_nest_end(msg, pinfoattr); 4801 4802 genlmsg_end(msg, hdr); 4803 return 0; 4804 4805 nla_put_failure: 4806 genlmsg_cancel(msg, hdr); 4807 return -EMSGSIZE; 4808 } 4809 4810 static int nl80211_dump_mpath(struct sk_buff *skb, 4811 struct netlink_callback *cb) 4812 { 4813 struct mpath_info pinfo; 4814 struct cfg80211_registered_device *rdev; 4815 struct wireless_dev *wdev; 4816 u8 dst[ETH_ALEN]; 4817 u8 next_hop[ETH_ALEN]; 4818 int path_idx = cb->args[2]; 4819 int err; 4820 4821 err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev); 4822 if (err) 4823 return err; 4824 4825 if (!rdev->ops->dump_mpath) { 4826 err = -EOPNOTSUPP; 4827 goto out_err; 4828 } 4829 4830 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) { 4831 err = -EOPNOTSUPP; 4832 goto out_err; 4833 } 4834 4835 while (1) { 4836 err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst, 4837 next_hop, &pinfo); 4838 if (err == -ENOENT) 4839 break; 4840 if (err) 4841 goto out_err; 4842 4843 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid, 4844 cb->nlh->nlmsg_seq, NLM_F_MULTI, 4845 wdev->netdev, dst, next_hop, 4846 &pinfo) < 0) 4847 goto out; 4848 4849 path_idx++; 4850 } 4851 4852 out: 4853 cb->args[2] = path_idx; 4854 err = skb->len; 4855 out_err: 4856 nl80211_finish_wdev_dump(rdev); 4857 return err; 4858 } 4859 4860 static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info) 4861 { 4862 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4863 int err; 4864 struct net_device *dev = info->user_ptr[1]; 4865 struct mpath_info pinfo; 4866 struct sk_buff *msg; 4867 u8 *dst = NULL; 4868 u8 next_hop[ETH_ALEN]; 4869 4870 memset(&pinfo, 0, sizeof(pinfo)); 4871 4872 if (!info->attrs[NL80211_ATTR_MAC]) 4873 return -EINVAL; 4874 4875 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 4876 4877 if (!rdev->ops->get_mpath) 4878 return -EOPNOTSUPP; 4879 4880 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 4881 return -EOPNOTSUPP; 4882 4883 err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo); 4884 if (err) 4885 return err; 4886 4887 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4888 if (!msg) 4889 return -ENOMEM; 4890 4891 if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0, 4892 dev, dst, next_hop, &pinfo) < 0) { 4893 nlmsg_free(msg); 4894 return -ENOBUFS; 4895 } 4896 4897 return genlmsg_reply(msg, info); 4898 } 4899 4900 static int nl80211_set_mpath(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 u8 *dst = NULL; 4905 u8 *next_hop = NULL; 4906 4907 if (!info->attrs[NL80211_ATTR_MAC]) 4908 return -EINVAL; 4909 4910 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]) 4911 return -EINVAL; 4912 4913 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 4914 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); 4915 4916 if (!rdev->ops->change_mpath) 4917 return -EOPNOTSUPP; 4918 4919 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 4920 return -EOPNOTSUPP; 4921 4922 return rdev_change_mpath(rdev, dev, dst, next_hop); 4923 } 4924 4925 static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info) 4926 { 4927 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4928 struct net_device *dev = info->user_ptr[1]; 4929 u8 *dst = NULL; 4930 u8 *next_hop = NULL; 4931 4932 if (!info->attrs[NL80211_ATTR_MAC]) 4933 return -EINVAL; 4934 4935 if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]) 4936 return -EINVAL; 4937 4938 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 4939 next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]); 4940 4941 if (!rdev->ops->add_mpath) 4942 return -EOPNOTSUPP; 4943 4944 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 4945 return -EOPNOTSUPP; 4946 4947 return rdev_add_mpath(rdev, dev, dst, next_hop); 4948 } 4949 4950 static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info) 4951 { 4952 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4953 struct net_device *dev = info->user_ptr[1]; 4954 u8 *dst = NULL; 4955 4956 if (info->attrs[NL80211_ATTR_MAC]) 4957 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 4958 4959 if (!rdev->ops->del_mpath) 4960 return -EOPNOTSUPP; 4961 4962 return rdev_del_mpath(rdev, dev, dst); 4963 } 4964 4965 static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info) 4966 { 4967 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 4968 int err; 4969 struct net_device *dev = info->user_ptr[1]; 4970 struct mpath_info pinfo; 4971 struct sk_buff *msg; 4972 u8 *dst = NULL; 4973 u8 mpp[ETH_ALEN]; 4974 4975 memset(&pinfo, 0, sizeof(pinfo)); 4976 4977 if (!info->attrs[NL80211_ATTR_MAC]) 4978 return -EINVAL; 4979 4980 dst = nla_data(info->attrs[NL80211_ATTR_MAC]); 4981 4982 if (!rdev->ops->get_mpp) 4983 return -EOPNOTSUPP; 4984 4985 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) 4986 return -EOPNOTSUPP; 4987 4988 err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo); 4989 if (err) 4990 return err; 4991 4992 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 4993 if (!msg) 4994 return -ENOMEM; 4995 4996 if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0, 4997 dev, dst, mpp, &pinfo) < 0) { 4998 nlmsg_free(msg); 4999 return -ENOBUFS; 5000 } 5001 5002 return genlmsg_reply(msg, info); 5003 } 5004 5005 static int nl80211_dump_mpp(struct sk_buff *skb, 5006 struct netlink_callback *cb) 5007 { 5008 struct mpath_info pinfo; 5009 struct cfg80211_registered_device *rdev; 5010 struct wireless_dev *wdev; 5011 u8 dst[ETH_ALEN]; 5012 u8 mpp[ETH_ALEN]; 5013 int path_idx = cb->args[2]; 5014 int err; 5015 5016 err = nl80211_prepare_wdev_dump(skb, cb, &rdev, &wdev); 5017 if (err) 5018 return err; 5019 5020 if (!rdev->ops->dump_mpp) { 5021 err = -EOPNOTSUPP; 5022 goto out_err; 5023 } 5024 5025 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) { 5026 err = -EOPNOTSUPP; 5027 goto out_err; 5028 } 5029 5030 while (1) { 5031 err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst, 5032 mpp, &pinfo); 5033 if (err == -ENOENT) 5034 break; 5035 if (err) 5036 goto out_err; 5037 5038 if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid, 5039 cb->nlh->nlmsg_seq, NLM_F_MULTI, 5040 wdev->netdev, dst, mpp, 5041 &pinfo) < 0) 5042 goto out; 5043 5044 path_idx++; 5045 } 5046 5047 out: 5048 cb->args[2] = path_idx; 5049 err = skb->len; 5050 out_err: 5051 nl80211_finish_wdev_dump(rdev); 5052 return err; 5053 } 5054 5055 static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info) 5056 { 5057 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5058 struct net_device *dev = info->user_ptr[1]; 5059 struct wireless_dev *wdev = dev->ieee80211_ptr; 5060 struct bss_parameters params; 5061 int err; 5062 5063 memset(¶ms, 0, sizeof(params)); 5064 /* default to not changing parameters */ 5065 params.use_cts_prot = -1; 5066 params.use_short_preamble = -1; 5067 params.use_short_slot_time = -1; 5068 params.ap_isolate = -1; 5069 params.ht_opmode = -1; 5070 params.p2p_ctwindow = -1; 5071 params.p2p_opp_ps = -1; 5072 5073 if (info->attrs[NL80211_ATTR_BSS_CTS_PROT]) 5074 params.use_cts_prot = 5075 nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]); 5076 if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]) 5077 params.use_short_preamble = 5078 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]); 5079 if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]) 5080 params.use_short_slot_time = 5081 nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]); 5082 if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) { 5083 params.basic_rates = 5084 nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 5085 params.basic_rates_len = 5086 nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]); 5087 } 5088 if (info->attrs[NL80211_ATTR_AP_ISOLATE]) 5089 params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]); 5090 if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE]) 5091 params.ht_opmode = 5092 nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]); 5093 5094 if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) { 5095 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 5096 return -EINVAL; 5097 params.p2p_ctwindow = 5098 nla_get_s8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]); 5099 if (params.p2p_ctwindow < 0) 5100 return -EINVAL; 5101 if (params.p2p_ctwindow != 0 && 5102 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)) 5103 return -EINVAL; 5104 } 5105 5106 if (info->attrs[NL80211_ATTR_P2P_OPPPS]) { 5107 u8 tmp; 5108 5109 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 5110 return -EINVAL; 5111 tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]); 5112 if (tmp > 1) 5113 return -EINVAL; 5114 params.p2p_opp_ps = tmp; 5115 if (params.p2p_opp_ps && 5116 !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)) 5117 return -EINVAL; 5118 } 5119 5120 if (!rdev->ops->change_bss) 5121 return -EOPNOTSUPP; 5122 5123 if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && 5124 dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) 5125 return -EOPNOTSUPP; 5126 5127 wdev_lock(wdev); 5128 err = rdev_change_bss(rdev, dev, ¶ms); 5129 wdev_unlock(wdev); 5130 5131 return err; 5132 } 5133 5134 static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info) 5135 { 5136 char *data = NULL; 5137 bool is_indoor; 5138 enum nl80211_user_reg_hint_type user_reg_hint_type; 5139 u32 owner_nlportid; 5140 5141 /* 5142 * You should only get this when cfg80211 hasn't yet initialized 5143 * completely when built-in to the kernel right between the time 5144 * window between nl80211_init() and regulatory_init(), if that is 5145 * even possible. 5146 */ 5147 if (unlikely(!rcu_access_pointer(cfg80211_regdomain))) 5148 return -EINPROGRESS; 5149 5150 if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]) 5151 user_reg_hint_type = 5152 nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]); 5153 else 5154 user_reg_hint_type = NL80211_USER_REG_HINT_USER; 5155 5156 switch (user_reg_hint_type) { 5157 case NL80211_USER_REG_HINT_USER: 5158 case NL80211_USER_REG_HINT_CELL_BASE: 5159 if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) 5160 return -EINVAL; 5161 5162 data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); 5163 return regulatory_hint_user(data, user_reg_hint_type); 5164 case NL80211_USER_REG_HINT_INDOOR: 5165 if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) { 5166 owner_nlportid = info->snd_portid; 5167 is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR]; 5168 } else { 5169 owner_nlportid = 0; 5170 is_indoor = true; 5171 } 5172 5173 return regulatory_hint_indoor(is_indoor, owner_nlportid); 5174 default: 5175 return -EINVAL; 5176 } 5177 } 5178 5179 static int nl80211_get_mesh_config(struct sk_buff *skb, 5180 struct genl_info *info) 5181 { 5182 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5183 struct net_device *dev = info->user_ptr[1]; 5184 struct wireless_dev *wdev = dev->ieee80211_ptr; 5185 struct mesh_config cur_params; 5186 int err = 0; 5187 void *hdr; 5188 struct nlattr *pinfoattr; 5189 struct sk_buff *msg; 5190 5191 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) 5192 return -EOPNOTSUPP; 5193 5194 if (!rdev->ops->get_mesh_config) 5195 return -EOPNOTSUPP; 5196 5197 wdev_lock(wdev); 5198 /* If not connected, get default parameters */ 5199 if (!wdev->mesh_id_len) 5200 memcpy(&cur_params, &default_mesh_config, sizeof(cur_params)); 5201 else 5202 err = rdev_get_mesh_config(rdev, dev, &cur_params); 5203 wdev_unlock(wdev); 5204 5205 if (err) 5206 return err; 5207 5208 /* Draw up a netlink message to send back */ 5209 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5210 if (!msg) 5211 return -ENOMEM; 5212 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, 5213 NL80211_CMD_GET_MESH_CONFIG); 5214 if (!hdr) 5215 goto out; 5216 pinfoattr = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG); 5217 if (!pinfoattr) 5218 goto nla_put_failure; 5219 if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) || 5220 nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT, 5221 cur_params.dot11MeshRetryTimeout) || 5222 nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT, 5223 cur_params.dot11MeshConfirmTimeout) || 5224 nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT, 5225 cur_params.dot11MeshHoldingTimeout) || 5226 nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS, 5227 cur_params.dot11MeshMaxPeerLinks) || 5228 nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES, 5229 cur_params.dot11MeshMaxRetries) || 5230 nla_put_u8(msg, NL80211_MESHCONF_TTL, 5231 cur_params.dot11MeshTTL) || 5232 nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL, 5233 cur_params.element_ttl) || 5234 nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS, 5235 cur_params.auto_open_plinks) || 5236 nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, 5237 cur_params.dot11MeshNbrOffsetMaxNeighbor) || 5238 nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, 5239 cur_params.dot11MeshHWMPmaxPREQretries) || 5240 nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME, 5241 cur_params.path_refresh_time) || 5242 nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, 5243 cur_params.min_discovery_timeout) || 5244 nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, 5245 cur_params.dot11MeshHWMPactivePathTimeout) || 5246 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, 5247 cur_params.dot11MeshHWMPpreqMinInterval) || 5248 nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, 5249 cur_params.dot11MeshHWMPperrMinInterval) || 5250 nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, 5251 cur_params.dot11MeshHWMPnetDiameterTraversalTime) || 5252 nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE, 5253 cur_params.dot11MeshHWMPRootMode) || 5254 nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL, 5255 cur_params.dot11MeshHWMPRannInterval) || 5256 nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS, 5257 cur_params.dot11MeshGateAnnouncementProtocol) || 5258 nla_put_u8(msg, NL80211_MESHCONF_FORWARDING, 5259 cur_params.dot11MeshForwarding) || 5260 nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD, 5261 cur_params.rssi_threshold) || 5262 nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE, 5263 cur_params.ht_opmode) || 5264 nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, 5265 cur_params.dot11MeshHWMPactivePathToRootTimeout) || 5266 nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL, 5267 cur_params.dot11MeshHWMProotInterval) || 5268 nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, 5269 cur_params.dot11MeshHWMPconfirmationInterval) || 5270 nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE, 5271 cur_params.power_mode) || 5272 nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW, 5273 cur_params.dot11MeshAwakeWindowDuration) || 5274 nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT, 5275 cur_params.plink_timeout)) 5276 goto nla_put_failure; 5277 nla_nest_end(msg, pinfoattr); 5278 genlmsg_end(msg, hdr); 5279 return genlmsg_reply(msg, info); 5280 5281 nla_put_failure: 5282 genlmsg_cancel(msg, hdr); 5283 out: 5284 nlmsg_free(msg); 5285 return -ENOBUFS; 5286 } 5287 5288 static const struct nla_policy nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = { 5289 [NL80211_MESHCONF_RETRY_TIMEOUT] = { .type = NLA_U16 }, 5290 [NL80211_MESHCONF_CONFIRM_TIMEOUT] = { .type = NLA_U16 }, 5291 [NL80211_MESHCONF_HOLDING_TIMEOUT] = { .type = NLA_U16 }, 5292 [NL80211_MESHCONF_MAX_PEER_LINKS] = { .type = NLA_U16 }, 5293 [NL80211_MESHCONF_MAX_RETRIES] = { .type = NLA_U8 }, 5294 [NL80211_MESHCONF_TTL] = { .type = NLA_U8 }, 5295 [NL80211_MESHCONF_ELEMENT_TTL] = { .type = NLA_U8 }, 5296 [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = { .type = NLA_U8 }, 5297 [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] = { .type = NLA_U32 }, 5298 [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 }, 5299 [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 }, 5300 [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = { .type = NLA_U16 }, 5301 [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 }, 5302 [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] = { .type = NLA_U16 }, 5303 [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] = { .type = NLA_U16 }, 5304 [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] = { .type = NLA_U16 }, 5305 [NL80211_MESHCONF_HWMP_ROOTMODE] = { .type = NLA_U8 }, 5306 [NL80211_MESHCONF_HWMP_RANN_INTERVAL] = { .type = NLA_U16 }, 5307 [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = { .type = NLA_U8 }, 5308 [NL80211_MESHCONF_FORWARDING] = { .type = NLA_U8 }, 5309 [NL80211_MESHCONF_RSSI_THRESHOLD] = { .type = NLA_U32 }, 5310 [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 }, 5311 [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 }, 5312 [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] = { .type = NLA_U16 }, 5313 [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] = { .type = NLA_U16 }, 5314 [NL80211_MESHCONF_POWER_MODE] = { .type = NLA_U32 }, 5315 [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 }, 5316 [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 }, 5317 }; 5318 5319 static const struct nla_policy 5320 nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = { 5321 [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 }, 5322 [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 }, 5323 [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 }, 5324 [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG }, 5325 [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 }, 5326 [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG }, 5327 [NL80211_MESH_SETUP_IE] = { .type = NLA_BINARY, 5328 .len = IEEE80211_MAX_DATA_LEN }, 5329 [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG }, 5330 }; 5331 5332 static int nl80211_check_bool(const struct nlattr *nla, u8 min, u8 max, bool *out) 5333 { 5334 u8 val = nla_get_u8(nla); 5335 if (val < min || val > max) 5336 return -EINVAL; 5337 *out = val; 5338 return 0; 5339 } 5340 5341 static int nl80211_check_u8(const struct nlattr *nla, u8 min, u8 max, u8 *out) 5342 { 5343 u8 val = nla_get_u8(nla); 5344 if (val < min || val > max) 5345 return -EINVAL; 5346 *out = val; 5347 return 0; 5348 } 5349 5350 static int nl80211_check_u16(const struct nlattr *nla, u16 min, u16 max, u16 *out) 5351 { 5352 u16 val = nla_get_u16(nla); 5353 if (val < min || val > max) 5354 return -EINVAL; 5355 *out = val; 5356 return 0; 5357 } 5358 5359 static int nl80211_check_u32(const struct nlattr *nla, u32 min, u32 max, u32 *out) 5360 { 5361 u32 val = nla_get_u32(nla); 5362 if (val < min || val > max) 5363 return -EINVAL; 5364 *out = val; 5365 return 0; 5366 } 5367 5368 static int nl80211_check_s32(const struct nlattr *nla, s32 min, s32 max, s32 *out) 5369 { 5370 s32 val = nla_get_s32(nla); 5371 if (val < min || val > max) 5372 return -EINVAL; 5373 *out = val; 5374 return 0; 5375 } 5376 5377 static int nl80211_parse_mesh_config(struct genl_info *info, 5378 struct mesh_config *cfg, 5379 u32 *mask_out) 5380 { 5381 struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1]; 5382 u32 mask = 0; 5383 u16 ht_opmode; 5384 5385 #define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, min, max, mask, attr, fn) \ 5386 do { \ 5387 if (tb[attr]) { \ 5388 if (fn(tb[attr], min, max, &cfg->param)) \ 5389 return -EINVAL; \ 5390 mask |= (1 << (attr - 1)); \ 5391 } \ 5392 } while (0) 5393 5394 if (!info->attrs[NL80211_ATTR_MESH_CONFIG]) 5395 return -EINVAL; 5396 if (nla_parse_nested(tb, NL80211_MESHCONF_ATTR_MAX, 5397 info->attrs[NL80211_ATTR_MESH_CONFIG], 5398 nl80211_meshconf_params_policy)) 5399 return -EINVAL; 5400 5401 /* This makes sure that there aren't more than 32 mesh config 5402 * parameters (otherwise our bitfield scheme would not work.) */ 5403 BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32); 5404 5405 /* Fill in the params struct */ 5406 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, 1, 255, 5407 mask, NL80211_MESHCONF_RETRY_TIMEOUT, 5408 nl80211_check_u16); 5409 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, 1, 255, 5410 mask, NL80211_MESHCONF_CONFIRM_TIMEOUT, 5411 nl80211_check_u16); 5412 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, 1, 255, 5413 mask, NL80211_MESHCONF_HOLDING_TIMEOUT, 5414 nl80211_check_u16); 5415 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, 0, 255, 5416 mask, NL80211_MESHCONF_MAX_PEER_LINKS, 5417 nl80211_check_u16); 5418 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, 0, 16, 5419 mask, NL80211_MESHCONF_MAX_RETRIES, 5420 nl80211_check_u8); 5421 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, 1, 255, 5422 mask, NL80211_MESHCONF_TTL, nl80211_check_u8); 5423 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, 1, 255, 5424 mask, NL80211_MESHCONF_ELEMENT_TTL, 5425 nl80211_check_u8); 5426 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, 0, 1, 5427 mask, NL80211_MESHCONF_AUTO_OPEN_PLINKS, 5428 nl80211_check_bool); 5429 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor, 5430 1, 255, mask, 5431 NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR, 5432 nl80211_check_u32); 5433 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, 0, 255, 5434 mask, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, 5435 nl80211_check_u8); 5436 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, 1, 65535, 5437 mask, NL80211_MESHCONF_PATH_REFRESH_TIME, 5438 nl80211_check_u32); 5439 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, 1, 65535, 5440 mask, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, 5441 nl80211_check_u16); 5442 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout, 5443 1, 65535, mask, 5444 NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, 5445 nl80211_check_u32); 5446 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval, 5447 1, 65535, mask, 5448 NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, 5449 nl80211_check_u16); 5450 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval, 5451 1, 65535, mask, 5452 NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, 5453 nl80211_check_u16); 5454 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, 5455 dot11MeshHWMPnetDiameterTraversalTime, 5456 1, 65535, mask, 5457 NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME, 5458 nl80211_check_u16); 5459 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, 0, 4, 5460 mask, NL80211_MESHCONF_HWMP_ROOTMODE, 5461 nl80211_check_u8); 5462 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, 1, 65535, 5463 mask, NL80211_MESHCONF_HWMP_RANN_INTERVAL, 5464 nl80211_check_u16); 5465 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, 5466 dot11MeshGateAnnouncementProtocol, 0, 1, 5467 mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS, 5468 nl80211_check_bool); 5469 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, 0, 1, 5470 mask, NL80211_MESHCONF_FORWARDING, 5471 nl80211_check_bool); 5472 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, -255, 0, 5473 mask, NL80211_MESHCONF_RSSI_THRESHOLD, 5474 nl80211_check_s32); 5475 /* 5476 * Check HT operation mode based on 5477 * IEEE 802.11 2012 8.4.2.59 HT Operation element. 5478 */ 5479 if (tb[NL80211_MESHCONF_HT_OPMODE]) { 5480 ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]); 5481 5482 if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION | 5483 IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT | 5484 IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)) 5485 return -EINVAL; 5486 5487 if ((ht_opmode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT) && 5488 (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)) 5489 return -EINVAL; 5490 5491 switch (ht_opmode & IEEE80211_HT_OP_MODE_PROTECTION) { 5492 case IEEE80211_HT_OP_MODE_PROTECTION_NONE: 5493 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ: 5494 if (ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT) 5495 return -EINVAL; 5496 break; 5497 case IEEE80211_HT_OP_MODE_PROTECTION_NONMEMBER: 5498 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED: 5499 if (!(ht_opmode & IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT)) 5500 return -EINVAL; 5501 break; 5502 } 5503 cfg->ht_opmode = ht_opmode; 5504 } 5505 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathToRootTimeout, 5506 1, 65535, mask, 5507 NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT, 5508 nl80211_check_u32); 5509 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, 1, 65535, 5510 mask, NL80211_MESHCONF_HWMP_ROOT_INTERVAL, 5511 nl80211_check_u16); 5512 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, 5513 dot11MeshHWMPconfirmationInterval, 5514 1, 65535, mask, 5515 NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL, 5516 nl80211_check_u16); 5517 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode, 5518 NL80211_MESH_POWER_ACTIVE, 5519 NL80211_MESH_POWER_MAX, 5520 mask, NL80211_MESHCONF_POWER_MODE, 5521 nl80211_check_u32); 5522 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration, 5523 0, 65535, mask, 5524 NL80211_MESHCONF_AWAKE_WINDOW, nl80211_check_u16); 5525 FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, 0, 0xffffffff, 5526 mask, NL80211_MESHCONF_PLINK_TIMEOUT, 5527 nl80211_check_u32); 5528 if (mask_out) 5529 *mask_out = mask; 5530 5531 return 0; 5532 5533 #undef FILL_IN_MESH_PARAM_IF_SET 5534 } 5535 5536 static int nl80211_parse_mesh_setup(struct genl_info *info, 5537 struct mesh_setup *setup) 5538 { 5539 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5540 struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1]; 5541 5542 if (!info->attrs[NL80211_ATTR_MESH_SETUP]) 5543 return -EINVAL; 5544 if (nla_parse_nested(tb, NL80211_MESH_SETUP_ATTR_MAX, 5545 info->attrs[NL80211_ATTR_MESH_SETUP], 5546 nl80211_mesh_setup_params_policy)) 5547 return -EINVAL; 5548 5549 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC]) 5550 setup->sync_method = 5551 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ? 5552 IEEE80211_SYNC_METHOD_VENDOR : 5553 IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET; 5554 5555 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL]) 5556 setup->path_sel_proto = 5557 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ? 5558 IEEE80211_PATH_PROTOCOL_VENDOR : 5559 IEEE80211_PATH_PROTOCOL_HWMP; 5560 5561 if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC]) 5562 setup->path_metric = 5563 (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ? 5564 IEEE80211_PATH_METRIC_VENDOR : 5565 IEEE80211_PATH_METRIC_AIRTIME; 5566 5567 if (tb[NL80211_MESH_SETUP_IE]) { 5568 struct nlattr *ieattr = 5569 tb[NL80211_MESH_SETUP_IE]; 5570 if (!is_valid_ie_attr(ieattr)) 5571 return -EINVAL; 5572 setup->ie = nla_data(ieattr); 5573 setup->ie_len = nla_len(ieattr); 5574 } 5575 if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] && 5576 !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM)) 5577 return -EINVAL; 5578 setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]); 5579 setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]); 5580 setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]); 5581 if (setup->is_secure) 5582 setup->user_mpm = true; 5583 5584 if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) { 5585 if (!setup->user_mpm) 5586 return -EINVAL; 5587 setup->auth_id = 5588 nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]); 5589 } 5590 5591 return 0; 5592 } 5593 5594 static int nl80211_update_mesh_config(struct sk_buff *skb, 5595 struct genl_info *info) 5596 { 5597 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 5598 struct net_device *dev = info->user_ptr[1]; 5599 struct wireless_dev *wdev = dev->ieee80211_ptr; 5600 struct mesh_config cfg; 5601 u32 mask; 5602 int err; 5603 5604 if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) 5605 return -EOPNOTSUPP; 5606 5607 if (!rdev->ops->update_mesh_config) 5608 return -EOPNOTSUPP; 5609 5610 err = nl80211_parse_mesh_config(info, &cfg, &mask); 5611 if (err) 5612 return err; 5613 5614 wdev_lock(wdev); 5615 if (!wdev->mesh_id_len) 5616 err = -ENOLINK; 5617 5618 if (!err) 5619 err = rdev_update_mesh_config(rdev, dev, mask, &cfg); 5620 5621 wdev_unlock(wdev); 5622 5623 return err; 5624 } 5625 5626 static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom, 5627 struct sk_buff *msg) 5628 { 5629 struct nlattr *nl_reg_rules; 5630 unsigned int i; 5631 5632 if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) || 5633 (regdom->dfs_region && 5634 nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region))) 5635 goto nla_put_failure; 5636 5637 nl_reg_rules = nla_nest_start(msg, NL80211_ATTR_REG_RULES); 5638 if (!nl_reg_rules) 5639 goto nla_put_failure; 5640 5641 for (i = 0; i < regdom->n_reg_rules; i++) { 5642 struct nlattr *nl_reg_rule; 5643 const struct ieee80211_reg_rule *reg_rule; 5644 const struct ieee80211_freq_range *freq_range; 5645 const struct ieee80211_power_rule *power_rule; 5646 unsigned int max_bandwidth_khz; 5647 5648 reg_rule = ®dom->reg_rules[i]; 5649 freq_range = ®_rule->freq_range; 5650 power_rule = ®_rule->power_rule; 5651 5652 nl_reg_rule = nla_nest_start(msg, i); 5653 if (!nl_reg_rule) 5654 goto nla_put_failure; 5655 5656 max_bandwidth_khz = freq_range->max_bandwidth_khz; 5657 if (!max_bandwidth_khz) 5658 max_bandwidth_khz = reg_get_max_bandwidth(regdom, 5659 reg_rule); 5660 5661 if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS, 5662 reg_rule->flags) || 5663 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START, 5664 freq_range->start_freq_khz) || 5665 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END, 5666 freq_range->end_freq_khz) || 5667 nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW, 5668 max_bandwidth_khz) || 5669 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN, 5670 power_rule->max_antenna_gain) || 5671 nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP, 5672 power_rule->max_eirp) || 5673 nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME, 5674 reg_rule->dfs_cac_ms)) 5675 goto nla_put_failure; 5676 5677 nla_nest_end(msg, nl_reg_rule); 5678 } 5679 5680 nla_nest_end(msg, nl_reg_rules); 5681 return 0; 5682 5683 nla_put_failure: 5684 return -EMSGSIZE; 5685 } 5686 5687 static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info) 5688 { 5689 const struct ieee80211_regdomain *regdom = NULL; 5690 struct cfg80211_registered_device *rdev; 5691 struct wiphy *wiphy = NULL; 5692 struct sk_buff *msg; 5693 void *hdr; 5694 5695 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); 5696 if (!msg) 5697 return -ENOBUFS; 5698 5699 hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0, 5700 NL80211_CMD_GET_REG); 5701 if (!hdr) 5702 goto put_failure; 5703 5704 if (info->attrs[NL80211_ATTR_WIPHY]) { 5705 bool self_managed; 5706 5707 rdev = cfg80211_get_dev_from_info(genl_info_net(info), info); 5708 if (IS_ERR(rdev)) { 5709 nlmsg_free(msg); 5710 return PTR_ERR(rdev); 5711 } 5712 5713 wiphy = &rdev->wiphy; 5714 self_managed = wiphy->regulatory_flags & 5715 REGULATORY_WIPHY_SELF_MANAGED; 5716 regdom = get_wiphy_regdom(wiphy); 5717 5718 /* a self-managed-reg device must have a private regdom */ 5719 if (WARN_ON(!regdom && self_managed)) { 5720 nlmsg_free(msg); 5721 return -EINVAL; 5722 } 5723 5724 if (regdom && 5725 nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy))) 5726 goto nla_put_failure; 5727 } 5728 5729 if (!wiphy && reg_last_request_cell_base() && 5730 nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE, 5731 NL80211_USER_REG_HINT_CELL_BASE)) 5732 goto nla_put_failure; 5733 5734 rcu_read_lock(); 5735 5736 if (!regdom) 5737 regdom = rcu_dereference(cfg80211_regdomain); 5738 5739 if (nl80211_put_regdom(regdom, msg)) 5740 goto nla_put_failure_rcu; 5741 5742 rcu_read_unlock(); 5743 5744 genlmsg_end(msg, hdr); 5745 return genlmsg_reply(msg, info); 5746 5747 nla_put_failure_rcu: 5748 rcu_read_unlock(); 5749 nla_put_failure: 5750 genlmsg_cancel(msg, hdr); 5751 put_failure: 5752 nlmsg_free(msg); 5753 return -EMSGSIZE; 5754 } 5755 5756 static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb, 5757 u32 seq, int flags, struct wiphy *wiphy, 5758 const struct ieee80211_regdomain *regdom) 5759 { 5760 void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags, 5761 NL80211_CMD_GET_REG); 5762 5763 if (!hdr) 5764 return -1; 5765 5766 genl_dump_check_consistent(cb, hdr, &nl80211_fam); 5767 5768 if (nl80211_put_regdom(regdom, msg)) 5769 goto nla_put_failure; 5770 5771 if (!wiphy && reg_last_request_cell_base() && 5772 nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE, 5773 NL80211_USER_REG_HINT_CELL_BASE)) 5774 goto nla_put_failure; 5775 5776 if (wiphy && 5777 nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy))) 5778 goto nla_put_failure; 5779 5780 if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && 5781 nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG)) 5782 goto nla_put_failure; 5783 5784 genlmsg_end(msg, hdr); 5785 return 0; 5786 5787 nla_put_failure: 5788 genlmsg_cancel(msg, hdr); 5789 return -EMSGSIZE; 5790 } 5791 5792 static int nl80211_get_reg_dump(struct sk_buff *skb, 5793 struct netlink_callback *cb) 5794 { 5795 const struct ieee80211_regdomain *regdom = NULL; 5796 struct cfg80211_registered_device *rdev; 5797 int err, reg_idx, start = cb->args[2]; 5798 5799 rtnl_lock(); 5800 5801 if (cfg80211_regdomain && start == 0) { 5802 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq, 5803 NLM_F_MULTI, NULL, 5804 rtnl_dereference(cfg80211_regdomain)); 5805 if (err < 0) 5806 goto out_err; 5807 } 5808 5809 /* the global regdom is idx 0 */ 5810 reg_idx = 1; 5811 list_for_each_entry(rdev, &cfg80211_rdev_list, list) { 5812 regdom = get_wiphy_regdom(&rdev->wiphy); 5813 if (!regdom) 5814 continue; 5815 5816 if (++reg_idx <= start) 5817 continue; 5818 5819 err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq, 5820 NLM_F_MULTI, &rdev->wiphy, regdom); 5821 if (err < 0) { 5822 reg_idx--; 5823 break; 5824 } 5825 } 5826 5827 cb->args[2] = reg_idx; 5828 err = skb->len; 5829 out_err: 5830 rtnl_unlock(); 5831 return err; 5832 } 5833 5834 #ifdef CONFIG_CFG80211_CRDA_SUPPORT 5835 static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = { 5836 [NL80211_ATTR_REG_RULE_FLAGS] = { .type = NLA_U32 }, 5837 [NL80211_ATTR_FREQ_RANGE_START] = { .type = NLA_U32 }, 5838 [NL80211_ATTR_FREQ_RANGE_END] = { .type = NLA_U32 }, 5839 [NL80211_ATTR_FREQ_RANGE_MAX_BW] = { .type = NLA_U32 }, 5840 [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 }, 5841 [NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 }, 5842 [NL80211_ATTR_DFS_CAC_TIME] = { .type = NLA_U32 }, 5843 }; 5844 5845 static int parse_reg_rule(struct nlattr *tb[], 5846 struct ieee80211_reg_rule *reg_rule) 5847 { 5848 struct ieee80211_freq_range *freq_range = ®_rule->freq_range; 5849 struct ieee80211_power_rule *power_rule = ®_rule->power_rule; 5850 5851 if (!tb[NL80211_ATTR_REG_RULE_FLAGS]) 5852 return -EINVAL; 5853 if (!tb[NL80211_ATTR_FREQ_RANGE_START]) 5854 return -EINVAL; 5855 if (!tb[NL80211_ATTR_FREQ_RANGE_END]) 5856 return -EINVAL; 5857 if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]) 5858 return -EINVAL; 5859 if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]) 5860 return -EINVAL; 5861 5862 reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]); 5863 5864 freq_range->start_freq_khz = 5865 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]); 5866 freq_range->end_freq_khz = 5867 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]); 5868 freq_range->max_bandwidth_khz = 5869 nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]); 5870 5871 power_rule->max_eirp = 5872 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]); 5873 5874 if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]) 5875 power_rule->max_antenna_gain = 5876 nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]); 5877 5878 if (tb[NL80211_ATTR_DFS_CAC_TIME]) 5879 reg_rule->dfs_cac_ms = 5880 nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]); 5881 5882 return 0; 5883 } 5884 5885 static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info) 5886 { 5887 struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1]; 5888 struct nlattr *nl_reg_rule; 5889 char *alpha2; 5890 int rem_reg_rules, r; 5891 u32 num_rules = 0, rule_idx = 0, size_of_regd; 5892 enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET; 5893 struct ieee80211_regdomain *rd; 5894 5895 if (!info->attrs[NL80211_ATTR_REG_ALPHA2]) 5896 return -EINVAL; 5897 5898 if (!info->attrs[NL80211_ATTR_REG_RULES]) 5899 return -EINVAL; 5900 5901 alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]); 5902 5903 if (info->attrs[NL80211_ATTR_DFS_REGION]) 5904 dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]); 5905 5906 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], 5907 rem_reg_rules) { 5908 num_rules++; 5909 if (num_rules > NL80211_MAX_SUPP_REG_RULES) 5910 return -EINVAL; 5911 } 5912 5913 if (!reg_is_valid_request(alpha2)) 5914 return -EINVAL; 5915 5916 size_of_regd = sizeof(struct ieee80211_regdomain) + 5917 num_rules * sizeof(struct ieee80211_reg_rule); 5918 5919 rd = kzalloc(size_of_regd, GFP_KERNEL); 5920 if (!rd) 5921 return -ENOMEM; 5922 5923 rd->n_reg_rules = num_rules; 5924 rd->alpha2[0] = alpha2[0]; 5925 rd->alpha2[1] = alpha2[1]; 5926 5927 /* 5928 * Disable DFS master mode if the DFS region was 5929 * not supported or known on this kernel. 5930 */ 5931 if (reg_supported_dfs_region(dfs_region)) 5932 rd->dfs_region = dfs_region; 5933 5934 nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES], 5935 rem_reg_rules) { 5936 r = nla_parse(tb, NL80211_REG_RULE_ATTR_MAX, 5937 nla_data(nl_reg_rule), nla_len(nl_reg_rule), 5938 reg_rule_policy); 5939 if (r) 5940 goto bad_reg; 5941 r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]); 5942 if (r) 5943 goto bad_reg; 5944 5945 rule_idx++; 5946 5947 if (rule_idx > NL80211_MAX_SUPP_REG_RULES) { 5948 r = -EINVAL; 5949 goto bad_reg; 5950 } 5951 } 5952 5953 /* set_regdom takes ownership of rd */ 5954 return set_regdom(rd, REGD_SOURCE_CRDA); 5955 bad_reg: 5956 kfree(rd); 5957 return r; 5958 } 5959 #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ 5960 5961 static int validate_scan_freqs(struct nlattr *freqs) 5962 { 5963 struct nlattr *attr1, *attr2; 5964 int n_channels = 0, tmp1, tmp2; 5965 5966 nla_for_each_nested(attr1, freqs, tmp1) { 5967 n_channels++; 5968 /* 5969 * Some hardware has a limited channel list for 5970 * scanning, and it is pretty much nonsensical 5971 * to scan for a channel twice, so disallow that 5972 * and don't require drivers to check that the 5973 * channel list they get isn't longer than what 5974 * they can scan, as long as they can scan all 5975 * the channels they registered at once. 5976 */ 5977 nla_for_each_nested(attr2, freqs, tmp2) 5978 if (attr1 != attr2 && 5979 nla_get_u32(attr1) == nla_get_u32(attr2)) 5980 return 0; 5981 } 5982 5983 return n_channels; 5984 } 5985 5986 static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b) 5987 { 5988 return b < NUM_NL80211_BANDS && wiphy->bands[b]; 5989 } 5990 5991 static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy, 5992 struct cfg80211_bss_selection *bss_select) 5993 { 5994 struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1]; 5995 struct nlattr *nest; 5996 int err; 5997 bool found = false; 5998 int i; 5999 6000 /* only process one nested attribute */ 6001 nest = nla_data(nla); 6002 if (!nla_ok(nest, nla_len(nest))) 6003 return -EINVAL; 6004 6005 err = nla_parse(attr, NL80211_BSS_SELECT_ATTR_MAX, nla_data(nest), 6006 nla_len(nest), nl80211_bss_select_policy); 6007 if (err) 6008 return err; 6009 6010 /* only one attribute may be given */ 6011 for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) { 6012 if (attr[i]) { 6013 if (found) 6014 return -EINVAL; 6015 found = true; 6016 } 6017 } 6018 6019 bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID; 6020 6021 if (attr[NL80211_BSS_SELECT_ATTR_RSSI]) 6022 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI; 6023 6024 if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) { 6025 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF; 6026 bss_select->param.band_pref = 6027 nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]); 6028 if (!is_band_valid(wiphy, bss_select->param.band_pref)) 6029 return -EINVAL; 6030 } 6031 6032 if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) { 6033 struct nl80211_bss_select_rssi_adjust *adj_param; 6034 6035 adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]); 6036 bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST; 6037 bss_select->param.adjust.band = adj_param->band; 6038 bss_select->param.adjust.delta = adj_param->delta; 6039 if (!is_band_valid(wiphy, bss_select->param.adjust.band)) 6040 return -EINVAL; 6041 } 6042 6043 /* user-space did not provide behaviour attribute */ 6044 if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID) 6045 return -EINVAL; 6046 6047 if (!(wiphy->bss_select_support & BIT(bss_select->behaviour))) 6048 return -EINVAL; 6049 6050 return 0; 6051 } 6052 6053 static int nl80211_parse_random_mac(struct nlattr **attrs, 6054 u8 *mac_addr, u8 *mac_addr_mask) 6055 { 6056 int i; 6057 6058 if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) { 6059 eth_zero_addr(mac_addr); 6060 eth_zero_addr(mac_addr_mask); 6061 mac_addr[0] = 0x2; 6062 mac_addr_mask[0] = 0x3; 6063 6064 return 0; 6065 } 6066 6067 /* need both or none */ 6068 if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK]) 6069 return -EINVAL; 6070 6071 memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN); 6072 memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN); 6073 6074 /* don't allow or configure an mcast address */ 6075 if (!is_multicast_ether_addr(mac_addr_mask) || 6076 is_multicast_ether_addr(mac_addr)) 6077 return -EINVAL; 6078 6079 /* 6080 * allow users to pass a MAC address that has bits set outside 6081 * of the mask, but don't bother drivers with having to deal 6082 * with such bits 6083 */ 6084 for (i = 0; i < ETH_ALEN; i++) 6085 mac_addr[i] &= mac_addr_mask[i]; 6086 6087 return 0; 6088 } 6089 6090 static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info) 6091 { 6092 struct cfg80211_registered_device *rdev = info->user_ptr[0]; 6093 struct wireless_dev *wdev = info->user_ptr[1]; 6094 struct cfg80211_scan_request *request; 6095 struct nlattr *attr; 6096 struct wiphy *wiphy; 6097 int err, tmp, n_ssids = 0, n_channels, i; 6098 size_t ie_len; 6099 6100 if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE])) 6101 return -EINVAL; 6102 6103 wiphy = &rdev->wiphy; 6104 6105 if (!rdev->ops->scan) 6106 return -EOPNOTSUPP; 6107 6108 if (rdev->scan_req || rdev->scan_msg) { 6109 err = -EBUSY; 6110 goto unlock; 6111 } 6112 6113 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 6114 n_channels = validate_scan_freqs( 6115 info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]); 6116 if (!n_channels) { 6117 err = -EINVAL; 6118 goto unlock; 6119 } 6120 } else { 6121 n_channels = ieee80211_get_num_supported_channels(wiphy); 6122 } 6123 6124 if (info->attrs[NL80211_ATTR_SCAN_SSIDS]) 6125 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) 6126 n_ssids++; 6127 6128 if (n_ssids > wiphy->max_scan_ssids) { 6129 err = -EINVAL; 6130 goto unlock; 6131 } 6132 6133 if (info->attrs[NL80211_ATTR_IE]) 6134 ie_len = nla_len(info->attrs[NL80211_ATTR_IE]); 6135 else 6136 ie_len = 0; 6137 6138 if (ie_len > wiphy->max_scan_ie_len) { 6139 err = -EINVAL; 6140 goto unlock; 6141 } 6142 6143 request = kzalloc(sizeof(*request) 6144 + sizeof(*request->ssids) * n_ssids 6145 + sizeof(*request->channels) * n_channels 6146 + ie_len, GFP_KERNEL); 6147 if (!request) { 6148 err = -ENOMEM; 6149 goto unlock; 6150 } 6151 6152 if (n_ssids) 6153 request->ssids = (void *)&request->channels[n_channels]; 6154 request->n_ssids = n_ssids; 6155 if (ie_len) { 6156 if (n_ssids) 6157 request->ie = (void *)(request->ssids + n_ssids); 6158 else 6159 request->ie = (void *)(request->channels + n_channels); 6160 } 6161 6162 i = 0; 6163 if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES]) { 6164 /* user specified, bail out if channel not found */ 6165 nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_FREQUENCIES], tmp) { 6166 struct ieee80211_channel *chan; 6167 6168 chan = ieee80211_get_channel(wiphy, nla_get_u32(attr)); 6169 6170 if (!chan) { 6171 err = -EINVAL; 6172 goto out_free; 6173 } 6174 6175 /* ignore disabled channels */ 6176 if (chan->flags & IEEE80211_CHAN_DISABLED) 6177 continue; 6178 6179 request->channels[i] = chan; 6180 i++; 6181 } 6182 } else { 6183 enum nl80211_band band; 6184 6185 /* all channels */ 6186 for (band = 0; band < NUM_NL80211_BANDS; band++) {