1/* 2 * Wireless utility functions 3 * 4 * Copyright 2007-2009 Johannes Berg <johannes@sipsolutions.net> 5 */ 6#include <linux/bitops.h> 7#include <linux/etherdevice.h> 8#include <linux/slab.h> 9#include <net/cfg80211.h> 10#include <net/ip.h> 11#include "core.h" 12 13struct ieee80211_rate * 14ieee80211_get_response_rate(struct ieee80211_supported_band *sband, 15 u32 basic_rates, int bitrate) 16{ 17 struct ieee80211_rate *result = &sband->bitrates[0]; 18 int i; 19 20 for (i = 0; i < sband->n_bitrates; i++) { 21 if (!(basic_rates & BIT(i))) 22 continue; 23 if (sband->bitrates[i].bitrate > bitrate) 24 continue; 25 result = &sband->bitrates[i]; 26 } 27 28 return result; 29} 30EXPORT_SYMBOL(ieee80211_get_response_rate); 31 32int ieee80211_channel_to_frequency(int chan) 33{ 34 if (chan < 14) 35 return 2407 + chan * 5; 36 37 if (chan == 14) 38 return 2484; 39 40 return (chan + 1000) * 5; 41} 42EXPORT_SYMBOL(ieee80211_channel_to_frequency); 43 44int ieee80211_frequency_to_channel(int freq) 45{ 46 if (freq == 2484) 47 return 14; 48 49 if (freq < 2484) 50 return (freq - 2407) / 5; 51 52 return freq/5 - 1000; 53} 54EXPORT_SYMBOL(ieee80211_frequency_to_channel); 55 56struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy, 57 int freq) 58{ 59 enum ieee80211_band band; 60 struct ieee80211_supported_band *sband; 61 int i; 62 63 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 64 sband = wiphy->bands[band]; 65 66 if (!sband) 67 continue; 68 69 for (i = 0; i < sband->n_channels; i++) { 70 if (sband->channels[i].center_freq == freq) 71 return &sband->channels[i]; 72 } 73 } 74 75 return NULL; 76} 77EXPORT_SYMBOL(__ieee80211_get_channel); 78 79static void set_mandatory_flags_band(struct ieee80211_supported_band *sband, 80 enum ieee80211_band band) 81{ 82 int i, want; 83 84 switch (band) { 85 case IEEE80211_BAND_5GHZ: 86 want = 3; 87 for (i = 0; i < sband->n_bitrates; i++) { 88 if (sband->bitrates[i].bitrate == 60 || 89 sband->bitrates[i].bitrate == 120 || 90 sband->bitrates[i].bitrate == 240) { 91 sband->bitrates[i].flags |= 92 IEEE80211_RATE_MANDATORY_A; 93 want--; 94 } 95 } 96 WARN_ON(want); 97 break; 98 case IEEE80211_BAND_2GHZ: 99 want = 7; 100 for (i = 0; i < sband->n_bitrates; i++) { 101 if (sband->bitrates[i].bitrate == 10) { 102 sband->bitrates[i].flags |= 103 IEEE80211_RATE_MANDATORY_B | 104 IEEE80211_RATE_MANDATORY_G; 105 want--; 106 } 107 108 if (sband->bitrates[i].bitrate == 20 || 109 sband->bitrates[i].bitrate == 55 || 110 sband->bitrates[i].bitrate == 110 || 111 sband->bitrates[i].bitrate == 60 || 112 sband->bitrates[i].bitrate == 120 || 113 sband->bitrates[i].bitrate == 240) { 114 sband->bitrates[i].flags |= 115 IEEE80211_RATE_MANDATORY_G; 116 want--; 117 } 118 119 if (sband->bitrates[i].bitrate != 10 && 120 sband->bitrates[i].bitrate != 20 && 121 sband->bitrates[i].bitrate != 55 && 122 sband->bitrates[i].bitrate != 110) 123 sband->bitrates[i].flags |= 124 IEEE80211_RATE_ERP_G; 125 } 126 WARN_ON(want != 0 && want != 3 && want != 6); 127 break; 128 case IEEE80211_NUM_BANDS: 129 WARN_ON(1); 130 break; 131 } 132} 133 134void ieee80211_set_bitrate_flags(struct wiphy *wiphy) 135{ 136 enum ieee80211_band band; 137 138 for (band = 0; band < IEEE80211_NUM_BANDS; band++) 139 if (wiphy->bands[band]) 140 set_mandatory_flags_band(wiphy->bands[band], band); 141} 142 143int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev, 144 struct key_params *params, int key_idx, 145 const u8 *mac_addr) 146{ 147 int i; 148 149 if (key_idx > 5) 150 return -EINVAL; 151 152 /* 153 * Disallow pairwise keys with non-zero index unless it's WEP 154 * (because current deployments use pairwise WEP keys with 155 * non-zero indizes but 802.11i clearly specifies to use zero) 156 */ 157 if (mac_addr && key_idx && 158 params->cipher != WLAN_CIPHER_SUITE_WEP40 && 159 params->cipher != WLAN_CIPHER_SUITE_WEP104) 160 return -EINVAL; 161 162 switch (params->cipher) { 163 case WLAN_CIPHER_SUITE_WEP40: 164 if (params->key_len != WLAN_KEY_LEN_WEP40) 165 return -EINVAL; 166 break; 167 case WLAN_CIPHER_SUITE_TKIP: 168 if (params->key_len != WLAN_KEY_LEN_TKIP) 169 return -EINVAL; 170 break; 171 case WLAN_CIPHER_SUITE_CCMP: 172 if (params->key_len != WLAN_KEY_LEN_CCMP) 173 return -EINVAL; 174 break; 175 case WLAN_CIPHER_SUITE_WEP104: 176 if (params->key_len != WLAN_KEY_LEN_WEP104) 177 return -EINVAL; 178 break; 179 case WLAN_CIPHER_SUITE_AES_CMAC: 180 if (params->key_len != WLAN_KEY_LEN_AES_CMAC) 181 return -EINVAL; 182 break; 183 default: 184 return -EINVAL; 185 } 186 187 if (params->seq) { 188 switch (params->cipher) { 189 case WLAN_CIPHER_SUITE_WEP40: 190 case WLAN_CIPHER_SUITE_WEP104: 191 /* These ciphers do not use key sequence */ 192 return -EINVAL; 193 case WLAN_CIPHER_SUITE_TKIP: 194 case WLAN_CIPHER_SUITE_CCMP: 195 case WLAN_CIPHER_SUITE_AES_CMAC: 196 if (params->seq_len != 6) 197 return -EINVAL; 198 break; 199 } 200 } 201 202 for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) 203 if (params->cipher == rdev->wiphy.cipher_suites[i]) 204 break; 205 if (i == rdev->wiphy.n_cipher_suites) 206 return -EINVAL; 207 208 return 0; 209} 210 211/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ 212/* Ethernet-II snap header (RFC1042 for most EtherTypes) */ 213const unsigned char rfc1042_header[] __aligned(2) = 214 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; 215EXPORT_SYMBOL(rfc1042_header); 216 217/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ 218const unsigned char bridge_tunnel_header[] __aligned(2) = 219 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; 220EXPORT_SYMBOL(bridge_tunnel_header); 221 222unsigned int ieee80211_hdrlen(__le16 fc) 223{ 224 unsigned int hdrlen = 24; 225 226 if (ieee80211_is_data(fc)) { 227 if (ieee80211_has_a4(fc)) 228 hdrlen = 30; 229 if (ieee80211_is_data_qos(fc)) { 230 hdrlen += IEEE80211_QOS_CTL_LEN; 231 if (ieee80211_has_order(fc)) 232 hdrlen += IEEE80211_HT_CTL_LEN; 233 } 234 goto out; 235 } 236 237 if (ieee80211_is_ctl(fc)) { 238 /* 239 * ACK and CTS are 10 bytes, all others 16. To see how 240 * to get this condition consider 241 * subtype mask: 0b0000000011110000 (0x00F0) 242 * ACK subtype: 0b0000000011010000 (0x00D0) 243 * CTS subtype: 0b0000000011000000 (0x00C0) 244 * bits that matter: ^^^ (0x00E0) 245 * value of those: 0b0000000011000000 (0x00C0) 246 */ 247 if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0)) 248 hdrlen = 10; 249 else 250 hdrlen = 16; 251 } 252out: 253 return hdrlen; 254} 255EXPORT_SYMBOL(ieee80211_hdrlen); 256 257unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) 258{ 259 const struct ieee80211_hdr *hdr = 260 (const struct ieee80211_hdr *)skb->data; 261 unsigned int hdrlen; 262 263 if (unlikely(skb->len < 10)) 264 return 0; 265 hdrlen = ieee80211_hdrlen(hdr->frame_control); 266 if (unlikely(hdrlen > skb->len)) 267 return 0; 268 return hdrlen; 269} 270EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); 271 272static int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr) 273{ 274 int ae = meshhdr->flags & MESH_FLAGS_AE; 275 /* 7.1.3.5a.2 */ 276 switch (ae) { 277 case 0: 278 return 6; 279 case MESH_FLAGS_AE_A4: 280 return 12; 281 case MESH_FLAGS_AE_A5_A6: 282 return 18; 283 case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6): 284 return 24; 285 default: 286 return 6; 287 } 288} 289 290int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr, 291 enum nl80211_iftype iftype) 292{ 293 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; 294 u16 hdrlen, ethertype; 295 u8 *payload; 296 u8 dst[ETH_ALEN]; 297 u8 src[ETH_ALEN] __aligned(2); 298 299 if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) 300 return -1; 301 302 hdrlen = ieee80211_hdrlen(hdr->frame_control); 303 304 /* convert IEEE 802.11 header + possible LLC headers into Ethernet 305 * header 306 * IEEE 802.11 address fields: 307 * ToDS FromDS Addr1 Addr2 Addr3 Addr4 308 * 0 0 DA SA BSSID n/a 309 * 0 1 DA BSSID SA n/a 310 * 1 0 BSSID SA DA n/a 311 * 1 1 RA TA DA SA 312 */ 313 memcpy(dst, ieee80211_get_DA(hdr), ETH_ALEN); 314 memcpy(src, ieee80211_get_SA(hdr), ETH_ALEN); 315 316 switch (hdr->frame_control & 317 cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { 318 case cpu_to_le16(IEEE80211_FCTL_TODS): 319 if (unlikely(iftype != NL80211_IFTYPE_AP && 320 iftype != NL80211_IFTYPE_AP_VLAN)) 321 return -1; 322 break; 323 case cpu_to_le16(IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): 324 if (unlikely(iftype != NL80211_IFTYPE_WDS && 325 iftype != NL80211_IFTYPE_MESH_POINT && 326 iftype != NL80211_IFTYPE_AP_VLAN && 327 iftype != NL80211_IFTYPE_STATION)) 328 return -1; 329 if (iftype == NL80211_IFTYPE_MESH_POINT) { 330 struct ieee80211s_hdr *meshdr = 331 (struct ieee80211s_hdr *) (skb->data + hdrlen); 332 /* make sure meshdr->flags is on the linear part */ 333 if (!pskb_may_pull(skb, hdrlen + 1)) 334 return -1; 335 if (meshdr->flags & MESH_FLAGS_AE_A5_A6) { 336 skb_copy_bits(skb, hdrlen + 337 offsetof(struct ieee80211s_hdr, eaddr1), 338 dst, ETH_ALEN); 339 skb_copy_bits(skb, hdrlen + 340 offsetof(struct ieee80211s_hdr, eaddr2), 341 src, ETH_ALEN); 342 } 343 hdrlen += ieee80211_get_mesh_hdrlen(meshdr); 344 } 345 break; 346 case cpu_to_le16(IEEE80211_FCTL_FROMDS): 347 if ((iftype != NL80211_IFTYPE_STATION && 348 iftype != NL80211_IFTYPE_MESH_POINT) || 349 (is_multicast_ether_addr(dst) && 350 !compare_ether_addr(src, addr))) 351 return -1; 352 if (iftype == NL80211_IFTYPE_MESH_POINT) { 353 struct ieee80211s_hdr *meshdr = 354 (struct ieee80211s_hdr *) (skb->data + hdrlen); 355 /* make sure meshdr->flags is on the linear part */ 356 if (!pskb_may_pull(skb, hdrlen + 1)) 357 return -1; 358 if (meshdr->flags & MESH_FLAGS_AE_A4) 359 skb_copy_bits(skb, hdrlen + 360 offsetof(struct ieee80211s_hdr, eaddr1), 361 src, ETH_ALEN); 362 hdrlen += ieee80211_get_mesh_hdrlen(meshdr); 363 } 364 break; 365 case cpu_to_le16(0): 366 if (iftype != NL80211_IFTYPE_ADHOC) 367 return -1; 368 break; 369 } 370 371 if (!pskb_may_pull(skb, hdrlen + 8)) 372 return -1; 373 374 payload = skb->data + hdrlen; 375 ethertype = (payload[6] << 8) | payload[7]; 376 377 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && 378 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 379 compare_ether_addr(payload, bridge_tunnel_header) == 0)) { 380 /* remove RFC1042 or Bridge-Tunnel encapsulation and 381 * replace EtherType */ 382 skb_pull(skb, hdrlen + 6); 383 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN); 384 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN); 385 } else { 386 struct ethhdr *ehdr; 387 __be16 len; 388 389 skb_pull(skb, hdrlen); 390 len = htons(skb->len); 391 ehdr = (struct ethhdr *) skb_push(skb, sizeof(struct ethhdr)); 392 memcpy(ehdr->h_dest, dst, ETH_ALEN); 393 memcpy(ehdr->h_source, src, ETH_ALEN); 394 ehdr->h_proto = len; 395 } 396 return 0; 397} 398EXPORT_SYMBOL(ieee80211_data_to_8023); 399 400int ieee80211_data_from_8023(struct sk_buff *skb, const u8 *addr, 401 enum nl80211_iftype iftype, u8 *bssid, bool qos) 402{ 403 struct ieee80211_hdr hdr; 404 u16 hdrlen, ethertype; 405 __le16 fc; 406 const u8 *encaps_data; 407 int encaps_len, skip_header_bytes; 408 int nh_pos, h_pos; 409 int head_need; 410 411 if (unlikely(skb->len < ETH_HLEN)) 412 return -EINVAL; 413 414 nh_pos = skb_network_header(skb) - skb->data; 415 h_pos = skb_transport_header(skb) - skb->data; 416 417 /* convert Ethernet header to proper 802.11 header (based on 418 * operation mode) */ 419 ethertype = (skb->data[12] << 8) | skb->data[13]; 420 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA); 421 422 switch (iftype) { 423 case NL80211_IFTYPE_AP: 424 case NL80211_IFTYPE_AP_VLAN: 425 fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS); 426 /* DA BSSID SA */ 427 memcpy(hdr.addr1, skb->data, ETH_ALEN); 428 memcpy(hdr.addr2, addr, ETH_ALEN); 429 memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); 430 hdrlen = 24; 431 break; 432 case NL80211_IFTYPE_STATION: 433 fc |= cpu_to_le16(IEEE80211_FCTL_TODS); 434 /* BSSID SA DA */ 435 memcpy(hdr.addr1, bssid, ETH_ALEN); 436 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); 437 memcpy(hdr.addr3, skb->data, ETH_ALEN); 438 hdrlen = 24; 439 break; 440 case NL80211_IFTYPE_ADHOC: 441 /* DA SA BSSID */ 442 memcpy(hdr.addr1, skb->data, ETH_ALEN); 443 memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); 444 memcpy(hdr.addr3, bssid, ETH_ALEN); 445 hdrlen = 24; 446 break; 447 default: 448 return -EOPNOTSUPP; 449 } 450 451 if (qos) { 452 fc |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA); 453 hdrlen += 2; 454 } 455 456 hdr.frame_control = fc; 457 hdr.duration_id = 0; 458 hdr.seq_ctrl = 0; 459 460 skip_header_bytes = ETH_HLEN; 461 if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { 462 encaps_data = bridge_tunnel_header; 463 encaps_len = sizeof(bridge_tunnel_header); 464 skip_header_bytes -= 2; 465 } else if (ethertype > 0x600) { 466 encaps_data = rfc1042_header; 467 encaps_len = sizeof(rfc1042_header); 468 skip_header_bytes -= 2; 469 } else { 470 encaps_data = NULL; 471 encaps_len = 0; 472 } 473 474 skb_pull(skb, skip_header_bytes); 475 nh_pos -= skip_header_bytes; 476 h_pos -= skip_header_bytes; 477 478 head_need = hdrlen + encaps_len - skb_headroom(skb); 479 480 if (head_need > 0 || skb_cloned(skb)) { 481 head_need = max(head_need, 0); 482 if (head_need) 483 skb_orphan(skb); 484 485 if (pskb_expand_head(skb, head_need, 0, GFP_ATOMIC)) { 486 printk(KERN_ERR "failed to reallocate Tx buffer\n"); 487 return -ENOMEM; 488 } 489 skb->truesize += head_need; 490 } 491 492 if (encaps_data) { 493 memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); 494 nh_pos += encaps_len; 495 h_pos += encaps_len; 496 } 497 498 memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); 499 500 nh_pos += hdrlen; 501 h_pos += hdrlen; 502 503 /* Update skb pointers to various headers since this modified frame 504 * is going to go through Linux networking code that may potentially 505 * need things like pointer to IP header. */ 506 skb_set_mac_header(skb, 0); 507 skb_set_network_header(skb, nh_pos); 508 skb_set_transport_header(skb, h_pos); 509 510 return 0; 511} 512EXPORT_SYMBOL(ieee80211_data_from_8023); 513 514 515void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list, 516 const u8 *addr, enum nl80211_iftype iftype, 517 const unsigned int extra_headroom) 518{ 519 struct sk_buff *frame = NULL; 520 u16 ethertype; 521 u8 *payload; 522 const struct ethhdr *eth; 523 int remaining, err; 524 u8 dst[ETH_ALEN], src[ETH_ALEN]; 525 526 err = ieee80211_data_to_8023(skb, addr, iftype); 527 if (err) 528 goto out; 529 530 /* skip the wrapping header */ 531 eth = (struct ethhdr *) skb_pull(skb, sizeof(struct ethhdr)); 532 if (!eth) 533 goto out; 534 535 while (skb != frame) { 536 u8 padding; 537 __be16 len = eth->h_proto; 538 unsigned int subframe_len = sizeof(struct ethhdr) + ntohs(len); 539 540 remaining = skb->len; 541 memcpy(dst, eth->h_dest, ETH_ALEN); 542 memcpy(src, eth->h_source, ETH_ALEN); 543 544 padding = (4 - subframe_len) & 0x3; 545 /* the last MSDU has no padding */ 546 if (subframe_len > remaining) 547 goto purge; 548 549 skb_pull(skb, sizeof(struct ethhdr)); 550 /* reuse skb for the last subframe */ 551 if (remaining <= subframe_len + padding) 552 frame = skb; 553 else { 554 unsigned int hlen = ALIGN(extra_headroom, 4); 555 /* 556 * Allocate and reserve two bytes more for payload 557 * alignment since sizeof(struct ethhdr) is 14. 558 */ 559 frame = dev_alloc_skb(hlen + subframe_len + 2); 560 if (!frame) 561 goto purge; 562 563 skb_reserve(frame, hlen + sizeof(struct ethhdr) + 2); 564 memcpy(skb_put(frame, ntohs(len)), skb->data, 565 ntohs(len)); 566 567 eth = (struct ethhdr *)skb_pull(skb, ntohs(len) + 568 padding); 569 if (!eth) { 570 dev_kfree_skb(frame); 571 goto purge; 572 } 573 } 574 575 skb_reset_network_header(frame); 576 frame->dev = skb->dev; 577 frame->priority = skb->priority; 578 579 payload = frame->data; 580 ethertype = (payload[6] << 8) | payload[7]; 581 582 if (likely((compare_ether_addr(payload, rfc1042_header) == 0 && 583 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || 584 compare_ether_addr(payload, 585 bridge_tunnel_header) == 0)) { 586 /* remove RFC1042 or Bridge-Tunnel 587 * encapsulation and replace EtherType */ 588 skb_pull(frame, 6); 589 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); 590 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); 591 } else { 592 memcpy(skb_push(frame, sizeof(__be16)), &len, 593 sizeof(__be16)); 594 memcpy(skb_push(frame, ETH_ALEN), src, ETH_ALEN); 595 memcpy(skb_push(frame, ETH_ALEN), dst, ETH_ALEN); 596 } 597 __skb_queue_tail(list, frame); 598 } 599 600 return; 601 602 purge: 603 __skb_queue_purge(list); 604 out: 605 dev_kfree_skb(skb); 606} 607EXPORT_SYMBOL(ieee80211_amsdu_to_8023s); 608 609/* Given a data frame determine the 802.1p/1d tag to use. */ 610unsigned int cfg80211_classify8021d(struct sk_buff *skb) 611{ 612 unsigned int dscp; 613 614 /* skb->priority values from 256->263 are magic values to 615 * directly indicate a specific 802.1d priority. This is used 616 * to allow 802.1d priority to be passed directly in from VLAN 617 * tags, etc. 618 */ 619 if (skb->priority >= 256 && skb->priority <= 263) 620 return skb->priority - 256; 621 622 switch (skb->protocol) { 623 case htons(ETH_P_IP): 624 dscp = ip_hdr(skb)->tos & 0xfc; 625 break; 626 default: 627 return 0; 628 } 629 630 return dscp >> 5; 631} 632EXPORT_SYMBOL(cfg80211_classify8021d); 633 634const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie) 635{ 636 u8 *end, *pos; 637 638 pos = bss->information_elements; 639 if (pos == NULL) 640 return NULL; 641 end = pos + bss->len_information_elements; 642 643 while (pos + 1 < end) { 644 if (pos + 2 + pos[1] > end) 645 break; 646 if (pos[0] == ie) 647 return pos; 648 pos += 2 + pos[1]; 649 } 650 651 return NULL; 652} 653EXPORT_SYMBOL(ieee80211_bss_get_ie); 654 655void cfg80211_upload_connect_keys(struct wireless_dev *wdev) 656{ 657 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); 658 struct net_device *dev = wdev->netdev; 659 int i; 660 661 if (!wdev->connect_keys) 662 return; 663 664 for (i = 0; i < 6; i++) { 665 if (!wdev->connect_keys->params[i].cipher) 666 continue; 667 if (rdev->ops->add_key(wdev->wiphy, dev, i, NULL, 668 &wdev->connect_keys->params[i])) { 669 printk(KERN_ERR "%s: failed to set key %d\n", 670 dev->name, i); 671 continue; 672 } 673 if (wdev->connect_keys->def == i) 674 if (rdev->ops->set_default_key(wdev->wiphy, dev, i)) { 675 printk(KERN_ERR "%s: failed to set defkey %d\n", 676 dev->name, i); 677 continue; 678 } 679 if (wdev->connect_keys->defmgmt == i) 680 if (rdev->ops->set_default_mgmt_key(wdev->wiphy, dev, i)) 681 printk(KERN_ERR "%s: failed to set mgtdef %d\n", 682 dev->name, i); 683 } 684 685 kfree(wdev->connect_keys); 686 wdev->connect_keys = NULL; 687} 688 689static void cfg80211_process_wdev_events(struct wireless_dev *wdev) 690{ 691 struct cfg80211_event *ev; 692 unsigned long flags; 693 const u8 *bssid = NULL; 694 695 spin_lock_irqsave(&wdev->event_lock, flags); 696 while (!list_empty(&wdev->event_list)) { 697 ev = list_first_entry(&wdev->event_list, 698 struct cfg80211_event, list); 699 list_del(&ev->list); 700 spin_unlock_irqrestore(&wdev->event_lock, flags); 701 702 wdev_lock(wdev); 703 switch (ev->type) { 704 case EVENT_CONNECT_RESULT: 705 if (!is_zero_ether_addr(ev->cr.bssid)) 706 bssid = ev->cr.bssid; 707 __cfg80211_connect_result( 708 wdev->netdev, bssid, 709 ev->cr.req_ie, ev->cr.req_ie_len, 710 ev->cr.resp_ie, ev->cr.resp_ie_len, 711 ev->cr.status, 712 ev->cr.status == WLAN_STATUS_SUCCESS, 713 NULL); 714 break; 715 case EVENT_ROAMED: 716 __cfg80211_roamed(wdev, ev->rm.bssid, 717 ev->rm.req_ie, ev->rm.req_ie_len, 718 ev->rm.resp_ie, ev->rm.resp_ie_len); 719 break; 720 case EVENT_DISCONNECTED: 721 __cfg80211_disconnected(wdev->netdev, 722 ev->dc.ie, ev->dc.ie_len, 723 ev->dc.reason, true); 724 break; 725 case EVENT_IBSS_JOINED: 726 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); 727 break; 728 } 729 wdev_unlock(wdev); 730 731 kfree(ev); 732 733 spin_lock_irqsave(&wdev->event_lock, flags); 734 } 735 spin_unlock_irqrestore(&wdev->event_lock, flags); 736} 737 738void cfg80211_process_rdev_events(struct cfg80211_registered_device *rdev) 739{ 740 struct wireless_dev *wdev; 741 742 ASSERT_RTNL(); 743 ASSERT_RDEV_LOCK(rdev); 744 745 mutex_lock(&rdev->devlist_mtx); 746 747 list_for_each_entry(wdev, &rdev->netdev_list, list) 748 cfg80211_process_wdev_events(wdev); 749 750 mutex_unlock(&rdev->devlist_mtx); 751} 752 753int cfg80211_change_iface(struct cfg80211_registered_device *rdev, 754 struct net_device *dev, enum nl80211_iftype ntype, 755 u32 *flags, struct vif_params *params) 756{ 757 int err; 758 enum nl80211_iftype otype = dev->ieee80211_ptr->iftype; 759 760 ASSERT_RDEV_LOCK(rdev); 761 762 /* don't support changing VLANs, you just re-create them */ 763 if (otype == NL80211_IFTYPE_AP_VLAN) 764 return -EOPNOTSUPP; 765 766 if (!rdev->ops->change_virtual_intf || 767 !(rdev->wiphy.interface_modes & (1 << ntype))) 768 return -EOPNOTSUPP; 769 770 /* if it's part of a bridge, reject changing type to station/ibss */ 771 if ((dev->priv_flags & IFF_BRIDGE_PORT) && 772 (ntype == NL80211_IFTYPE_ADHOC || ntype == NL80211_IFTYPE_STATION)) 773 return -EBUSY; 774 775 if (ntype != otype) { 776 dev->ieee80211_ptr->use_4addr = false; 777 778 switch (otype) { 779 case NL80211_IFTYPE_ADHOC: 780 cfg80211_leave_ibss(rdev, dev, false); 781 break; 782 case NL80211_IFTYPE_STATION: 783 cfg80211_disconnect(rdev, dev, 784 WLAN_REASON_DEAUTH_LEAVING, true); 785 break; 786 case NL80211_IFTYPE_MESH_POINT: 787 /* mesh should be handled? */ 788 break; 789 default: 790 break; 791 } 792 793 cfg80211_process_rdev_events(rdev); 794 } 795 796 err = rdev->ops->change_virtual_intf(&rdev->wiphy, dev, 797 ntype, flags, params); 798 799 WARN_ON(!err && dev->ieee80211_ptr->iftype != ntype); 800 801 if (!err && params && params->use_4addr != -1) 802 dev->ieee80211_ptr->use_4addr = params->use_4addr; 803 804 if (!err) { 805 dev->priv_flags &= ~IFF_DONT_BRIDGE; 806 switch (ntype) { 807 case NL80211_IFTYPE_STATION: 808 if (dev->ieee80211_ptr->use_4addr) 809 break; 810 /* fall through */ 811 case NL80211_IFTYPE_ADHOC: 812 dev->priv_flags |= IFF_DONT_BRIDGE; 813 break; 814 case NL80211_IFTYPE_AP: 815 case NL80211_IFTYPE_AP_VLAN: 816 case NL80211_IFTYPE_WDS: 817 case NL80211_IFTYPE_MESH_POINT: 818 /* bridging OK */ 819 break; 820 case NL80211_IFTYPE_MONITOR: 821 /* monitor can't bridge anyway */ 822 break; 823 case NL80211_IFTYPE_UNSPECIFIED: 824 case __NL80211_IFTYPE_AFTER_LAST: 825 /* not happening */ 826 break; 827 } 828 } 829 830 return err; 831} 832 833u16 cfg80211_calculate_bitrate(struct rate_info *rate) 834{ 835 int modulation, streams, bitrate; 836 837 if (!(rate->flags & RATE_INFO_FLAGS_MCS)) 838 return rate->legacy; 839 840 /* the formula below does only work for MCS values smaller than 32 */ 841 if (rate->mcs >= 32) 842 return 0; 843 844 modulation = rate->mcs & 7; 845 streams = (rate->mcs >> 3) + 1; 846 847 bitrate = (rate->flags & RATE_INFO_FLAGS_40_MHZ_WIDTH) ? 848 13500000 : 6500000; 849 850 if (modulation < 4) 851 bitrate *= (modulation + 1); 852 else if (modulation == 4) 853 bitrate *= (modulation + 2); 854 else 855 bitrate *= (modulation + 3); 856 857 bitrate *= streams; 858 859 if (rate->flags & RATE_INFO_FLAGS_SHORT_GI) 860 bitrate = (bitrate / 9) * 10; 861 862 /* do NOT round down here */ 863 return (bitrate + 50000) / 100000; 864} 865