util.c 16.5 KB
Newer Older
Johannes Berg's avatar
Johannes Berg committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * utilities for mac80211
 */

#include <net/mac80211.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/wireless.h>
#include <linux/bitmap.h>
23
#include <net/net_namespace.h>
Johannes Berg's avatar
Johannes Berg committed
24
#include <net/cfg80211.h>
25
#include <net/rtnetlink.h>
Johannes Berg's avatar
Johannes Berg committed
26 27

#include "ieee80211_i.h"
Johannes Berg's avatar
Johannes Berg committed
28
#include "rate.h"
29
#include "mesh.h"
Johannes Berg's avatar
Johannes Berg committed
30 31 32 33 34 35 36
#include "wme.h"

/* privid for wiphys to determine whether they belong to us or not */
void *mac80211_wiphy_privid = &mac80211_wiphy_privid;

/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
37
const unsigned char rfc1042_header[] __aligned(2) =
Johannes Berg's avatar
Johannes Berg committed
38 39 40
	{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };

/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
41
const unsigned char bridge_tunnel_header[] __aligned(2) =
Johannes Berg's avatar
Johannes Berg committed
42 43 44
	{ 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };


45
u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
46
			enum nl80211_iftype type)
Johannes Berg's avatar
Johannes Berg committed
47
{
48
	__le16 fc = hdr->frame_control;
Johannes Berg's avatar
Johannes Berg committed
49

50 51
	 /* drop ACK/CTS frames and incorrect hdr len (ctrl) */
	if (len < 16)
Johannes Berg's avatar
Johannes Berg committed
52 53
		return NULL;

54
	if (ieee80211_is_data(fc)) {
55 56
		if (len < 24) /* drop incorrect hdr len (data) */
			return NULL;
57 58

		if (ieee80211_has_a4(fc))
Johannes Berg's avatar
Johannes Berg committed
59
			return NULL;
60 61 62
		if (ieee80211_has_tods(fc))
			return hdr->addr1;
		if (ieee80211_has_fromds(fc))
Johannes Berg's avatar
Johannes Berg committed
63
			return hdr->addr2;
64 65 66 67 68

		return hdr->addr3;
	}

	if (ieee80211_is_mgmt(fc)) {
69 70
		if (len < 24) /* drop incorrect hdr len (mgmt) */
			return NULL;
Johannes Berg's avatar
Johannes Berg committed
71
		return hdr->addr3;
72 73 74 75
	}

	if (ieee80211_is_ctl(fc)) {
		if(ieee80211_is_pspoll(fc))
Johannes Berg's avatar
Johannes Berg committed
76
			return hdr->addr1;
77 78

		if (ieee80211_is_back_req(fc)) {
79
			switch (type) {
80
			case NL80211_IFTYPE_STATION:
81
				return hdr->addr2;
82 83
			case NL80211_IFTYPE_AP:
			case NL80211_IFTYPE_AP_VLAN:
84 85
				return hdr->addr1;
			default:
86
				break; /* fall through to the return */
87 88
			}
		}
Johannes Berg's avatar
Johannes Berg committed
89 90 91 92 93
	}

	return NULL;
}

94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125
unsigned int ieee80211_hdrlen(__le16 fc)
{
	unsigned int hdrlen = 24;

	if (ieee80211_is_data(fc)) {
		if (ieee80211_has_a4(fc))
			hdrlen = 30;
		if (ieee80211_is_data_qos(fc))
			hdrlen += IEEE80211_QOS_CTL_LEN;
		goto out;
	}

	if (ieee80211_is_ctl(fc)) {
		/*
		 * ACK and CTS are 10 bytes, all others 16. To see how
		 * to get this condition consider
		 *   subtype mask:   0b0000000011110000 (0x00F0)
		 *   ACK subtype:    0b0000000011010000 (0x00D0)
		 *   CTS subtype:    0b0000000011000000 (0x00C0)
		 *   bits that matter:         ^^^      (0x00E0)
		 *   value of those: 0b0000000011000000 (0x00C0)
		 */
		if ((fc & cpu_to_le16(0x00E0)) == cpu_to_le16(0x00C0))
			hdrlen = 10;
		else
			hdrlen = 16;
	}
out:
	return hdrlen;
}
EXPORT_SYMBOL(ieee80211_hdrlen);

126
unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
Johannes Berg's avatar
Johannes Berg committed
127
{
128 129
	const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *)skb->data;
	unsigned int hdrlen;
Johannes Berg's avatar
Johannes Berg committed
130 131 132

	if (unlikely(skb->len < 10))
		return 0;
133
	hdrlen = ieee80211_hdrlen(hdr->frame_control);
Johannes Berg's avatar
Johannes Berg committed
134 135 136 137 138 139
	if (unlikely(hdrlen > skb->len))
		return 0;
	return hdrlen;
}
EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);

140 141 142 143 144 145
int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
{
	int ae = meshhdr->flags & IEEE80211S_FLAGS_AE;
	/* 7.1.3.5a.2 */
	switch (ae) {
	case 0:
146
		return 6;
147
	case 1:
148
		return 12;
149
	case 2:
150
		return 18;
151
	case 3:
152
		return 24;
153
	default:
154
		return 6;
155 156 157
	}
}

158
void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
Johannes Berg's avatar
Johannes Berg committed
159 160 161 162
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data;

	hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
163
	if (tx->extra_frag) {
Johannes Berg's avatar
Johannes Berg committed
164 165
		struct ieee80211_hdr *fhdr;
		int i;
166
		for (i = 0; i < tx->num_extra_frag; i++) {
Johannes Berg's avatar
Johannes Berg committed
167
			fhdr = (struct ieee80211_hdr *)
168
				tx->extra_frag[i]->data;
Johannes Berg's avatar
Johannes Berg committed
169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
			fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
		}
	}
}

int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
			     int rate, int erp, int short_preamble)
{
	int dur;

	/* calculate duration (in microseconds, rounded up to next higher
	 * integer if it includes a fractional microsecond) to send frame of
	 * len bytes (does not include FCS) at the given rate. Duration will
	 * also include SIFS.
	 *
	 * rate is in 100 kbps, so divident is multiplied by 10 in the
	 * DIV_ROUND_UP() operations.
	 */

188
	if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
Johannes Berg's avatar
Johannes Berg committed
189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227
		/*
		 * OFDM:
		 *
		 * N_DBPS = DATARATE x 4
		 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
		 *	(16 = SIGNAL time, 6 = tail bits)
		 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
		 *
		 * T_SYM = 4 usec
		 * 802.11a - 17.5.2: aSIFSTime = 16 usec
		 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
		 *	signal ext = 6 usec
		 */
		dur = 16; /* SIFS + signal ext */
		dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */
		dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */
		dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
					4 * rate); /* T_SYM x N_SYM */
	} else {
		/*
		 * 802.11b or 802.11g with 802.11b compatibility:
		 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
		 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
		 *
		 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
		 * aSIFSTime = 10 usec
		 * aPreambleLength = 144 usec or 72 usec with short preamble
		 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
		 */
		dur = 10; /* aSIFSTime = 10 usec */
		dur += short_preamble ? (72 + 24) : (144 + 48);

		dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
	}

	return dur;
}

/* Exported duration function for driver use */
228 229
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
					struct ieee80211_vif *vif,
230 231
					size_t frame_len,
					struct ieee80211_rate *rate)
Johannes Berg's avatar
Johannes Berg committed
232 233
{
	struct ieee80211_local *local = hw_to_local(hw);
234
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
Johannes Berg's avatar
Johannes Berg committed
235 236 237
	u16 dur;
	int erp;

238 239 240 241 242
	erp = 0;
	if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
		erp = rate->flags & IEEE80211_RATE_ERP_G;

	dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
243
				       sdata->bss_conf.use_short_preamble);
Johannes Berg's avatar
Johannes Berg committed
244 245 246 247 248

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_generic_frame_duration);

249 250
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
			      struct ieee80211_vif *vif, size_t frame_len,
251
			      const struct ieee80211_tx_info *frame_txctl)
Johannes Berg's avatar
Johannes Berg committed
252 253 254
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_rate *rate;
255
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
256
	bool short_preamble;
Johannes Berg's avatar
Johannes Berg committed
257 258
	int erp;
	u16 dur;
259 260 261
	struct ieee80211_supported_band *sband;

	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Berg's avatar
Johannes Berg committed
262

263
	short_preamble = sdata->bss_conf.use_short_preamble;
264

265
	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
266 267 268 269

	erp = 0;
	if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
		erp = rate->flags & IEEE80211_RATE_ERP_G;
Johannes Berg's avatar
Johannes Berg committed
270 271

	/* CTS duration */
272
	dur = ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Berg's avatar
Johannes Berg committed
273 274
				       erp, short_preamble);
	/* Data frame duration */
275
	dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Berg's avatar
Johannes Berg committed
276 277
					erp, short_preamble);
	/* ACK duration */
278
	dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Berg's avatar
Johannes Berg committed
279 280 281 282 283 284
					erp, short_preamble);

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_rts_duration);

285 286
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
				    struct ieee80211_vif *vif,
Johannes Berg's avatar
Johannes Berg committed
287
				    size_t frame_len,
288
				    const struct ieee80211_tx_info *frame_txctl)
Johannes Berg's avatar
Johannes Berg committed
289 290 291
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_rate *rate;
292
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
293
	bool short_preamble;
Johannes Berg's avatar
Johannes Berg committed
294 295
	int erp;
	u16 dur;
296 297 298
	struct ieee80211_supported_band *sband;

	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
Johannes Berg's avatar
Johannes Berg committed
299

300
	short_preamble = sdata->bss_conf.use_short_preamble;
301

302
	rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
303 304 305
	erp = 0;
	if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
		erp = rate->flags & IEEE80211_RATE_ERP_G;
Johannes Berg's avatar
Johannes Berg committed
306 307

	/* Data frame duration */
308
	dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
Johannes Berg's avatar
Johannes Berg committed
309
				       erp, short_preamble);
310
	if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
Johannes Berg's avatar
Johannes Berg committed
311
		/* ACK duration */
312
		dur += ieee80211_frame_duration(local, 10, rate->bitrate,
Johannes Berg's avatar
Johannes Berg committed
313 314 315 316 317 318 319 320 321 322 323
						erp, short_preamble);
	}

	return cpu_to_le16(dur);
}
EXPORT_SYMBOL(ieee80211_ctstoself_duration);

void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
{
	struct ieee80211_local *local = hw_to_local(hw);

324
	if (test_bit(queue, local->queues_pending)) {
325
		set_bit(queue, local->queues_pending_run);
326 327
		tasklet_schedule(&local->tx_pending_tasklet);
	} else {
328
		netif_wake_subqueue(local->mdev, queue);
Johannes Berg's avatar
Johannes Berg committed
329 330 331 332 333 334 335 336
	}
}
EXPORT_SYMBOL(ieee80211_wake_queue);

void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
{
	struct ieee80211_local *local = hw_to_local(hw);

337
	netif_stop_subqueue(local->mdev, queue);
Johannes Berg's avatar
Johannes Berg committed
338 339 340 341 342 343 344
}
EXPORT_SYMBOL(ieee80211_stop_queue);

void ieee80211_stop_queues(struct ieee80211_hw *hw)
{
	int i;

345
	for (i = 0; i < ieee80211_num_queues(hw); i++)
Johannes Berg's avatar
Johannes Berg committed
346 347 348 349
		ieee80211_stop_queue(hw, i);
}
EXPORT_SYMBOL(ieee80211_stop_queues);

350 351 352 353 354 355 356
int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
{
	struct ieee80211_local *local = hw_to_local(hw);
	return __netif_subqueue_stopped(local->mdev, queue);
}
EXPORT_SYMBOL(ieee80211_queue_stopped);

Johannes Berg's avatar
Johannes Berg committed
357 358 359 360
void ieee80211_wake_queues(struct ieee80211_hw *hw)
{
	int i;

361
	for (i = 0; i < hw->queues + hw->ampdu_queues; i++)
Johannes Berg's avatar
Johannes Berg committed
362 363 364
		ieee80211_wake_queue(hw, i);
}
EXPORT_SYMBOL(ieee80211_wake_queues);
365

366 367 368 369 370
void ieee80211_iterate_active_interfaces(
	struct ieee80211_hw *hw,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
371 372 373 374
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;

375 376 377 378
	rtnl_lock();

	list_for_each_entry(sdata, &local->interfaces, list) {
		switch (sdata->vif.type) {
379 380 381 382
		case __NL80211_IFTYPE_AFTER_LAST:
		case NL80211_IFTYPE_UNSPECIFIED:
		case NL80211_IFTYPE_MONITOR:
		case NL80211_IFTYPE_AP_VLAN:
383
			continue;
384 385 386 387 388
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_STATION:
		case NL80211_IFTYPE_ADHOC:
		case NL80211_IFTYPE_WDS:
		case NL80211_IFTYPE_MESH_POINT:
389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408
			break;
		}
		if (netif_running(sdata->dev))
			iterator(data, sdata->dev->dev_addr,
				 &sdata->vif);
	}

	rtnl_unlock();
}
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces);

void ieee80211_iterate_active_interfaces_atomic(
	struct ieee80211_hw *hw,
	void (*iterator)(void *data, u8 *mac,
			 struct ieee80211_vif *vif),
	void *data)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;

409
	rcu_read_lock();
410

411
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
412
		switch (sdata->vif.type) {
413 414 415 416
		case __NL80211_IFTYPE_AFTER_LAST:
		case NL80211_IFTYPE_UNSPECIFIED:
		case NL80211_IFTYPE_MONITOR:
		case NL80211_IFTYPE_AP_VLAN:
417
			continue;
418 419 420 421 422
		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_STATION:
		case NL80211_IFTYPE_ADHOC:
		case NL80211_IFTYPE_WDS:
		case NL80211_IFTYPE_MESH_POINT:
423 424 425 426
			break;
		}
		if (netif_running(sdata->dev))
			iterator(data, sdata->dev->dev_addr,
427
				 &sdata->vif);
428
	}
429 430

	rcu_read_unlock();
431
}
432
EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576

void ieee802_11_parse_elems(u8 *start, size_t len,
			    struct ieee802_11_elems *elems)
{
	size_t left = len;
	u8 *pos = start;

	memset(elems, 0, sizeof(*elems));
	elems->ie_start = start;
	elems->total_len = len;

	while (left >= 2) {
		u8 id, elen;

		id = *pos++;
		elen = *pos++;
		left -= 2;

		if (elen > left)
			return;

		switch (id) {
		case WLAN_EID_SSID:
			elems->ssid = pos;
			elems->ssid_len = elen;
			break;
		case WLAN_EID_SUPP_RATES:
			elems->supp_rates = pos;
			elems->supp_rates_len = elen;
			break;
		case WLAN_EID_FH_PARAMS:
			elems->fh_params = pos;
			elems->fh_params_len = elen;
			break;
		case WLAN_EID_DS_PARAMS:
			elems->ds_params = pos;
			elems->ds_params_len = elen;
			break;
		case WLAN_EID_CF_PARAMS:
			elems->cf_params = pos;
			elems->cf_params_len = elen;
			break;
		case WLAN_EID_TIM:
			elems->tim = pos;
			elems->tim_len = elen;
			break;
		case WLAN_EID_IBSS_PARAMS:
			elems->ibss_params = pos;
			elems->ibss_params_len = elen;
			break;
		case WLAN_EID_CHALLENGE:
			elems->challenge = pos;
			elems->challenge_len = elen;
			break;
		case WLAN_EID_WPA:
			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
			    pos[2] == 0xf2) {
				/* Microsoft OUI (00:50:F2) */
				if (pos[3] == 1) {
					/* OUI Type 1 - WPA IE */
					elems->wpa = pos;
					elems->wpa_len = elen;
				} else if (elen >= 5 && pos[3] == 2) {
					if (pos[4] == 0) {
						elems->wmm_info = pos;
						elems->wmm_info_len = elen;
					} else if (pos[4] == 1) {
						elems->wmm_param = pos;
						elems->wmm_param_len = elen;
					}
				}
			}
			break;
		case WLAN_EID_RSN:
			elems->rsn = pos;
			elems->rsn_len = elen;
			break;
		case WLAN_EID_ERP_INFO:
			elems->erp_info = pos;
			elems->erp_info_len = elen;
			break;
		case WLAN_EID_EXT_SUPP_RATES:
			elems->ext_supp_rates = pos;
			elems->ext_supp_rates_len = elen;
			break;
		case WLAN_EID_HT_CAPABILITY:
			elems->ht_cap_elem = pos;
			elems->ht_cap_elem_len = elen;
			break;
		case WLAN_EID_HT_EXTRA_INFO:
			elems->ht_info_elem = pos;
			elems->ht_info_elem_len = elen;
			break;
		case WLAN_EID_MESH_ID:
			elems->mesh_id = pos;
			elems->mesh_id_len = elen;
			break;
		case WLAN_EID_MESH_CONFIG:
			elems->mesh_config = pos;
			elems->mesh_config_len = elen;
			break;
		case WLAN_EID_PEER_LINK:
			elems->peer_link = pos;
			elems->peer_link_len = elen;
			break;
		case WLAN_EID_PREQ:
			elems->preq = pos;
			elems->preq_len = elen;
			break;
		case WLAN_EID_PREP:
			elems->prep = pos;
			elems->prep_len = elen;
			break;
		case WLAN_EID_PERR:
			elems->perr = pos;
			elems->perr_len = elen;
			break;
		case WLAN_EID_CHANNEL_SWITCH:
			elems->ch_switch_elem = pos;
			elems->ch_switch_elem_len = elen;
			break;
		case WLAN_EID_QUIET:
			if (!elems->quiet_elem) {
				elems->quiet_elem = pos;
				elems->quiet_elem_len = elen;
			}
			elems->num_of_quiet_elem++;
			break;
		case WLAN_EID_COUNTRY:
			elems->country_elem = pos;
			elems->country_elem_len = elen;
			break;
		case WLAN_EID_PWR_CONSTRAINT:
			elems->pwr_constr_elem = pos;
			elems->pwr_constr_elem_len = elen;
			break;
		default:
			break;
		}

		left -= elen;
		pos += elen;
	}
}
577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602

void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_tx_queue_params qparam;
	int i;

	if (!local->ops->conf_tx)
		return;

	memset(&qparam, 0, sizeof(qparam));

	qparam.aifs = 2;

	if (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ &&
	    !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE))
		qparam.cw_min = 31;
	else
		qparam.cw_min = 15;

	qparam.cw_max = 1023;
	qparam.txop = 0;

	for (i = 0; i < local_to_hw(local)->queues; i++)
		local->ops->conf_tx(local_to_hw(local), i, &qparam);
}
603 604 605 606 607 608 609 610 611 612 613 614 615 616

void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb,
		      int encrypt)
{
	skb->dev = sdata->local->mdev;
	skb_set_mac_header(skb, 0);
	skb_set_network_header(skb, 0);
	skb_set_transport_header(skb, 0);

	skb->iif = sdata->dev->ifindex;
	skb->do_not_encrypt = !encrypt;

	dev_queue_xmit(skb);
}
617 618 619 620 621 622 623 624 625 626

int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
{
	int ret = -EINVAL;
	struct ieee80211_channel *chan;
	struct ieee80211_local *local = sdata->local;

	chan = ieee80211_get_channel(local->hw.wiphy, freqMHz);

	if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
627
		if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
628 629 630 631 632 633 634
		    chan->flags & IEEE80211_CHAN_NO_IBSS) {
			printk(KERN_DEBUG "%s: IBSS not allowed on frequency "
				"%d MHz\n", sdata->dev->name, chan->center_freq);
			return ret;
		}
		local->oper_channel = chan;

635
		if (local->sw_scanning || local->hw_scanning)
636 637 638 639 640 641 642 643 644
			ret = 0;
		else
			ret = ieee80211_hw_config(local);

		rate_control_clear(local);
	}

	return ret;
}
645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672

u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
			      enum ieee80211_band band)
{
	struct ieee80211_supported_band *sband;
	struct ieee80211_rate *bitrates;
	u64 mandatory_rates;
	enum ieee80211_rate_flags mandatory_flag;
	int i;

	sband = local->hw.wiphy->bands[band];
	if (!sband) {
		WARN_ON(1);
		sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
	}

	if (band == IEEE80211_BAND_2GHZ)
		mandatory_flag = IEEE80211_RATE_MANDATORY_B;
	else
		mandatory_flag = IEEE80211_RATE_MANDATORY_A;

	bitrates = sband->bitrates;
	mandatory_rates = 0;
	for (i = 0; i < sband->n_bitrates; i++)
		if (bitrates[i].flags & mandatory_flag)
			mandatory_rates |= BIT(i);
	return mandatory_rates;
}