Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <net/mac80211.h> |
| 12 | #include <net/ieee80211_radiotap.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/netdevice.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/skbuff.h> |
| 19 | #include <linux/etherdevice.h> |
| 20 | #include <linux/if_arp.h> |
| 21 | #include <linux/wireless.h> |
| 22 | #include <linux/rtnetlink.h> |
| 23 | #include <net/iw_handler.h> |
| 24 | #include <linux/compiler.h> |
| 25 | #include <linux/bitmap.h> |
| 26 | #include <net/cfg80211.h> |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 27 | #include <asm/unaligned.h> |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 28 | |
| 29 | #include "ieee80211_common.h" |
| 30 | #include "ieee80211_i.h" |
| 31 | #include "ieee80211_rate.h" |
| 32 | #include "wep.h" |
| 33 | #include "wpa.h" |
| 34 | #include "tkip.h" |
| 35 | #include "wme.h" |
| 36 | #include "aes_ccm.h" |
| 37 | #include "ieee80211_led.h" |
| 38 | #include "ieee80211_cfg.h" |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 39 | #include "debugfs.h" |
| 40 | #include "debugfs_netdev.h" |
| 41 | #include "debugfs_key.h" |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 42 | |
| 43 | /* privid for wiphys to determine whether they belong to us or not */ |
| 44 | void *mac80211_wiphy_privid = &mac80211_wiphy_privid; |
| 45 | |
| 46 | /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */ |
| 47 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame^] | 48 | const unsigned char rfc1042_header[] = |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 49 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 }; |
| 50 | |
| 51 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame^] | 52 | const unsigned char bridge_tunnel_header[] = |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 53 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 }; |
| 54 | |
| 55 | /* No encapsulation header if EtherType < 0x600 (=length) */ |
| 56 | static const unsigned char eapol_header[] = |
| 57 | { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00, 0x88, 0x8e }; |
| 58 | |
| 59 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 60 | /* |
| 61 | * For seeing transmitted packets on monitor interfaces |
| 62 | * we have a radiotap header too. |
| 63 | */ |
| 64 | struct ieee80211_tx_status_rtap_hdr { |
| 65 | struct ieee80211_radiotap_header hdr; |
| 66 | __le16 tx_flags; |
| 67 | u8 data_retries; |
| 68 | } __attribute__ ((packed)); |
| 69 | |
| 70 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 71 | static inline void ieee80211_include_sequence(struct ieee80211_sub_if_data *sdata, |
| 72 | struct ieee80211_hdr *hdr) |
| 73 | { |
| 74 | /* Set the sequence number for this frame. */ |
| 75 | hdr->seq_ctrl = cpu_to_le16(sdata->sequence); |
| 76 | |
| 77 | /* Increase the sequence number. */ |
| 78 | sdata->sequence = (sdata->sequence + 0x10) & IEEE80211_SCTL_SEQ; |
| 79 | } |
| 80 | |
| 81 | struct ieee80211_key_conf * |
| 82 | ieee80211_key_data2conf(struct ieee80211_local *local, |
| 83 | const struct ieee80211_key *data) |
| 84 | { |
| 85 | struct ieee80211_key_conf *conf; |
| 86 | |
| 87 | conf = kmalloc(sizeof(*conf) + data->keylen, GFP_ATOMIC); |
| 88 | if (!conf) |
| 89 | return NULL; |
| 90 | |
| 91 | conf->hw_key_idx = data->hw_key_idx; |
| 92 | conf->alg = data->alg; |
| 93 | conf->keylen = data->keylen; |
| 94 | conf->flags = 0; |
| 95 | if (data->force_sw_encrypt) |
| 96 | conf->flags |= IEEE80211_KEY_FORCE_SW_ENCRYPT; |
| 97 | conf->keyidx = data->keyidx; |
| 98 | if (data->default_tx_key) |
| 99 | conf->flags |= IEEE80211_KEY_DEFAULT_TX_KEY; |
| 100 | if (local->default_wep_only) |
| 101 | conf->flags |= IEEE80211_KEY_DEFAULT_WEP_ONLY; |
| 102 | memcpy(conf->key, data->key, data->keylen); |
| 103 | |
| 104 | return conf; |
| 105 | } |
| 106 | |
| 107 | struct ieee80211_key *ieee80211_key_alloc(struct ieee80211_sub_if_data *sdata, |
| 108 | int idx, size_t key_len, gfp_t flags) |
| 109 | { |
| 110 | struct ieee80211_key *key; |
| 111 | |
| 112 | key = kzalloc(sizeof(struct ieee80211_key) + key_len, flags); |
| 113 | if (!key) |
| 114 | return NULL; |
| 115 | kref_init(&key->kref); |
| 116 | return key; |
| 117 | } |
| 118 | |
| 119 | static void ieee80211_key_release(struct kref *kref) |
| 120 | { |
| 121 | struct ieee80211_key *key; |
| 122 | |
| 123 | key = container_of(kref, struct ieee80211_key, kref); |
| 124 | if (key->alg == ALG_CCMP) |
| 125 | ieee80211_aes_key_free(key->u.ccmp.tfm); |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 126 | ieee80211_debugfs_key_remove(key); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 127 | kfree(key); |
| 128 | } |
| 129 | |
| 130 | void ieee80211_key_free(struct ieee80211_key *key) |
| 131 | { |
| 132 | if (key) |
| 133 | kref_put(&key->kref, ieee80211_key_release); |
| 134 | } |
| 135 | |
| 136 | static int rate_list_match(const int *rate_list, int rate) |
| 137 | { |
| 138 | int i; |
| 139 | |
| 140 | if (!rate_list) |
| 141 | return 0; |
| 142 | |
| 143 | for (i = 0; rate_list[i] >= 0; i++) |
| 144 | if (rate_list[i] == rate) |
| 145 | return 1; |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | |
| 151 | void ieee80211_prepare_rates(struct ieee80211_local *local, |
| 152 | struct ieee80211_hw_mode *mode) |
| 153 | { |
| 154 | int i; |
| 155 | |
| 156 | for (i = 0; i < mode->num_rates; i++) { |
| 157 | struct ieee80211_rate *rate = &mode->rates[i]; |
| 158 | |
| 159 | rate->flags &= ~(IEEE80211_RATE_SUPPORTED | |
| 160 | IEEE80211_RATE_BASIC); |
| 161 | |
| 162 | if (local->supp_rates[mode->mode]) { |
| 163 | if (!rate_list_match(local->supp_rates[mode->mode], |
| 164 | rate->rate)) |
| 165 | continue; |
| 166 | } |
| 167 | |
| 168 | rate->flags |= IEEE80211_RATE_SUPPORTED; |
| 169 | |
| 170 | /* Use configured basic rate set if it is available. If not, |
| 171 | * use defaults that are sane for most cases. */ |
| 172 | if (local->basic_rates[mode->mode]) { |
| 173 | if (rate_list_match(local->basic_rates[mode->mode], |
| 174 | rate->rate)) |
| 175 | rate->flags |= IEEE80211_RATE_BASIC; |
| 176 | } else switch (mode->mode) { |
| 177 | case MODE_IEEE80211A: |
| 178 | if (rate->rate == 60 || rate->rate == 120 || |
| 179 | rate->rate == 240) |
| 180 | rate->flags |= IEEE80211_RATE_BASIC; |
| 181 | break; |
| 182 | case MODE_IEEE80211B: |
| 183 | if (rate->rate == 10 || rate->rate == 20) |
| 184 | rate->flags |= IEEE80211_RATE_BASIC; |
| 185 | break; |
| 186 | case MODE_ATHEROS_TURBO: |
| 187 | if (rate->rate == 120 || rate->rate == 240 || |
| 188 | rate->rate == 480) |
| 189 | rate->flags |= IEEE80211_RATE_BASIC; |
| 190 | break; |
| 191 | case MODE_IEEE80211G: |
| 192 | if (rate->rate == 10 || rate->rate == 20 || |
| 193 | rate->rate == 55 || rate->rate == 110) |
| 194 | rate->flags |= IEEE80211_RATE_BASIC; |
| 195 | break; |
| 196 | } |
| 197 | |
| 198 | /* Set ERP and MANDATORY flags based on phymode */ |
| 199 | switch (mode->mode) { |
| 200 | case MODE_IEEE80211A: |
| 201 | if (rate->rate == 60 || rate->rate == 120 || |
| 202 | rate->rate == 240) |
| 203 | rate->flags |= IEEE80211_RATE_MANDATORY; |
| 204 | break; |
| 205 | case MODE_IEEE80211B: |
| 206 | if (rate->rate == 10) |
| 207 | rate->flags |= IEEE80211_RATE_MANDATORY; |
| 208 | break; |
| 209 | case MODE_ATHEROS_TURBO: |
| 210 | break; |
| 211 | case MODE_IEEE80211G: |
| 212 | if (rate->rate == 10 || rate->rate == 20 || |
| 213 | rate->rate == 55 || rate->rate == 110 || |
| 214 | rate->rate == 60 || rate->rate == 120 || |
| 215 | rate->rate == 240) |
| 216 | rate->flags |= IEEE80211_RATE_MANDATORY; |
| 217 | break; |
| 218 | } |
| 219 | if (ieee80211_is_erp_rate(mode->mode, rate->rate)) |
| 220 | rate->flags |= IEEE80211_RATE_ERP; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame^] | 225 | void ieee80211_key_threshold_notify(struct net_device *dev, |
| 226 | struct ieee80211_key *key, |
| 227 | struct sta_info *sta) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 228 | { |
| 229 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 230 | struct sk_buff *skb; |
| 231 | struct ieee80211_msg_key_notification *msg; |
| 232 | |
| 233 | /* if no one will get it anyway, don't even allocate it. |
| 234 | * unlikely because this is only relevant for APs |
| 235 | * where the device must be open... */ |
| 236 | if (unlikely(!local->apdev)) |
| 237 | return; |
| 238 | |
| 239 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + |
| 240 | sizeof(struct ieee80211_msg_key_notification)); |
| 241 | if (!skb) |
| 242 | return; |
| 243 | |
| 244 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); |
| 245 | msg = (struct ieee80211_msg_key_notification *) |
| 246 | skb_put(skb, sizeof(struct ieee80211_msg_key_notification)); |
| 247 | msg->tx_rx_count = key->tx_rx_count; |
| 248 | memcpy(msg->ifname, dev->name, IFNAMSIZ); |
| 249 | if (sta) |
| 250 | memcpy(msg->addr, sta->addr, ETH_ALEN); |
| 251 | else |
| 252 | memset(msg->addr, 0xff, ETH_ALEN); |
| 253 | |
| 254 | key->tx_rx_count = 0; |
| 255 | |
| 256 | ieee80211_rx_mgmt(local, skb, NULL, |
| 257 | ieee80211_msg_key_threshold_notification); |
| 258 | } |
| 259 | |
| 260 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame^] | 261 | u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 262 | { |
| 263 | u16 fc; |
| 264 | |
| 265 | if (len < 24) |
| 266 | return NULL; |
| 267 | |
| 268 | fc = le16_to_cpu(hdr->frame_control); |
| 269 | |
| 270 | switch (fc & IEEE80211_FCTL_FTYPE) { |
| 271 | case IEEE80211_FTYPE_DATA: |
| 272 | switch (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) { |
| 273 | case IEEE80211_FCTL_TODS: |
| 274 | return hdr->addr1; |
| 275 | case (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS): |
| 276 | return NULL; |
| 277 | case IEEE80211_FCTL_FROMDS: |
| 278 | return hdr->addr2; |
| 279 | case 0: |
| 280 | return hdr->addr3; |
| 281 | } |
| 282 | break; |
| 283 | case IEEE80211_FTYPE_MGMT: |
| 284 | return hdr->addr3; |
| 285 | case IEEE80211_FTYPE_CTL: |
| 286 | if ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL) |
| 287 | return hdr->addr1; |
| 288 | else |
| 289 | return NULL; |
| 290 | } |
| 291 | |
| 292 | return NULL; |
| 293 | } |
| 294 | |
| 295 | int ieee80211_get_hdrlen(u16 fc) |
| 296 | { |
| 297 | int hdrlen = 24; |
| 298 | |
| 299 | switch (fc & IEEE80211_FCTL_FTYPE) { |
| 300 | case IEEE80211_FTYPE_DATA: |
| 301 | if ((fc & IEEE80211_FCTL_FROMDS) && (fc & IEEE80211_FCTL_TODS)) |
| 302 | hdrlen = 30; /* Addr4 */ |
| 303 | /* |
| 304 | * The QoS Control field is two bytes and its presence is |
| 305 | * indicated by the IEEE80211_STYPE_QOS_DATA bit. Add 2 to |
| 306 | * hdrlen if that bit is set. |
| 307 | * This works by masking out the bit and shifting it to |
| 308 | * bit position 1 so the result has the value 0 or 2. |
| 309 | */ |
| 310 | hdrlen += (fc & IEEE80211_STYPE_QOS_DATA) |
| 311 | >> (ilog2(IEEE80211_STYPE_QOS_DATA)-1); |
| 312 | break; |
| 313 | case IEEE80211_FTYPE_CTL: |
| 314 | /* |
| 315 | * ACK and CTS are 10 bytes, all others 16. To see how |
| 316 | * to get this condition consider |
| 317 | * subtype mask: 0b0000000011110000 (0x00F0) |
| 318 | * ACK subtype: 0b0000000011010000 (0x00D0) |
| 319 | * CTS subtype: 0b0000000011000000 (0x00C0) |
| 320 | * bits that matter: ^^^ (0x00E0) |
| 321 | * value of those: 0b0000000011000000 (0x00C0) |
| 322 | */ |
| 323 | if ((fc & 0xE0) == 0xC0) |
| 324 | hdrlen = 10; |
| 325 | else |
| 326 | hdrlen = 16; |
| 327 | break; |
| 328 | } |
| 329 | |
| 330 | return hdrlen; |
| 331 | } |
| 332 | EXPORT_SYMBOL(ieee80211_get_hdrlen); |
| 333 | |
| 334 | int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb) |
| 335 | { |
| 336 | const struct ieee80211_hdr *hdr = (const struct ieee80211_hdr *) skb->data; |
| 337 | int hdrlen; |
| 338 | |
| 339 | if (unlikely(skb->len < 10)) |
| 340 | return 0; |
| 341 | hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)); |
| 342 | if (unlikely(hdrlen > skb->len)) |
| 343 | return 0; |
| 344 | return hdrlen; |
| 345 | } |
| 346 | EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb); |
| 347 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 348 | |
| 349 | #ifdef CONFIG_MAC80211_LOWTX_FRAME_DUMP |
| 350 | static void ieee80211_dump_frame(const char *ifname, const char *title, |
| 351 | const struct sk_buff *skb) |
| 352 | { |
| 353 | const struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 354 | u16 fc; |
| 355 | int hdrlen; |
| 356 | |
| 357 | printk(KERN_DEBUG "%s: %s (len=%d)", ifname, title, skb->len); |
| 358 | if (skb->len < 4) { |
| 359 | printk("\n"); |
| 360 | return; |
| 361 | } |
| 362 | |
| 363 | fc = le16_to_cpu(hdr->frame_control); |
| 364 | hdrlen = ieee80211_get_hdrlen(fc); |
| 365 | if (hdrlen > skb->len) |
| 366 | hdrlen = skb->len; |
| 367 | if (hdrlen >= 4) |
| 368 | printk(" FC=0x%04x DUR=0x%04x", |
| 369 | fc, le16_to_cpu(hdr->duration_id)); |
| 370 | if (hdrlen >= 10) |
| 371 | printk(" A1=" MAC_FMT, MAC_ARG(hdr->addr1)); |
| 372 | if (hdrlen >= 16) |
| 373 | printk(" A2=" MAC_FMT, MAC_ARG(hdr->addr2)); |
| 374 | if (hdrlen >= 24) |
| 375 | printk(" A3=" MAC_FMT, MAC_ARG(hdr->addr3)); |
| 376 | if (hdrlen >= 30) |
| 377 | printk(" A4=" MAC_FMT, MAC_ARG(hdr->addr4)); |
| 378 | printk("\n"); |
| 379 | } |
| 380 | #else /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ |
| 381 | static inline void ieee80211_dump_frame(const char *ifname, const char *title, |
| 382 | struct sk_buff *skb) |
| 383 | { |
| 384 | } |
| 385 | #endif /* CONFIG_MAC80211_LOWTX_FRAME_DUMP */ |
| 386 | |
| 387 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame^] | 388 | int ieee80211_is_eapol(const struct sk_buff *skb) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 389 | { |
| 390 | const struct ieee80211_hdr *hdr; |
| 391 | u16 fc; |
| 392 | int hdrlen; |
| 393 | |
| 394 | if (unlikely(skb->len < 10)) |
| 395 | return 0; |
| 396 | |
| 397 | hdr = (const struct ieee80211_hdr *) skb->data; |
| 398 | fc = le16_to_cpu(hdr->frame_control); |
| 399 | |
| 400 | if (unlikely(!WLAN_FC_DATA_PRESENT(fc))) |
| 401 | return 0; |
| 402 | |
| 403 | hdrlen = ieee80211_get_hdrlen(fc); |
| 404 | |
| 405 | if (unlikely(skb->len >= hdrlen + sizeof(eapol_header) && |
| 406 | memcmp(skb->data + hdrlen, eapol_header, |
| 407 | sizeof(eapol_header)) == 0)) |
| 408 | return 1; |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | |
| 414 | static ieee80211_txrx_result |
| 415 | ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx) |
| 416 | { |
| 417 | struct rate_control_extra extra; |
| 418 | |
| 419 | memset(&extra, 0, sizeof(extra)); |
| 420 | extra.mode = tx->u.tx.mode; |
| 421 | extra.mgmt_data = tx->sdata && |
| 422 | tx->sdata->type == IEEE80211_IF_TYPE_MGMT; |
| 423 | extra.ethertype = tx->ethertype; |
| 424 | |
| 425 | tx->u.tx.rate = rate_control_get_rate(tx->local, tx->dev, tx->skb, |
| 426 | &extra); |
| 427 | if (unlikely(extra.probe != NULL)) { |
| 428 | tx->u.tx.control->flags |= IEEE80211_TXCTL_RATE_CTRL_PROBE; |
| 429 | tx->u.tx.probe_last_frag = 1; |
| 430 | tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val; |
| 431 | tx->u.tx.rate = extra.probe; |
| 432 | } else { |
| 433 | tx->u.tx.control->alt_retry_rate = -1; |
| 434 | } |
| 435 | if (!tx->u.tx.rate) |
| 436 | return TXRX_DROP; |
| 437 | if (tx->u.tx.mode->mode == MODE_IEEE80211G && |
Daniel Drake | 63fc33c | 2007-07-10 19:32:11 +0200 | [diff] [blame] | 438 | tx->sdata->use_protection && tx->fragmented && |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 439 | extra.nonerp) { |
| 440 | tx->u.tx.last_frag_rate = tx->u.tx.rate; |
| 441 | tx->u.tx.probe_last_frag = extra.probe ? 1 : 0; |
| 442 | |
| 443 | tx->u.tx.rate = extra.nonerp; |
| 444 | tx->u.tx.control->rate = extra.nonerp; |
| 445 | tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE; |
| 446 | } else { |
| 447 | tx->u.tx.last_frag_rate = tx->u.tx.rate; |
| 448 | tx->u.tx.control->rate = tx->u.tx.rate; |
| 449 | } |
| 450 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val; |
| 451 | if ((tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) && |
| 452 | tx->local->short_preamble && |
| 453 | (!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) { |
| 454 | tx->u.tx.short_preamble = 1; |
| 455 | tx->u.tx.control->tx_rate = tx->u.tx.rate->val2; |
| 456 | } |
| 457 | |
| 458 | return TXRX_CONTINUE; |
| 459 | } |
| 460 | |
| 461 | |
| 462 | static ieee80211_txrx_result |
| 463 | ieee80211_tx_h_select_key(struct ieee80211_txrx_data *tx) |
| 464 | { |
| 465 | if (tx->sta) |
| 466 | tx->u.tx.control->key_idx = tx->sta->key_idx_compression; |
| 467 | else |
| 468 | tx->u.tx.control->key_idx = HW_KEY_IDX_INVALID; |
| 469 | |
| 470 | if (unlikely(tx->u.tx.control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT)) |
| 471 | tx->key = NULL; |
| 472 | else if (tx->sta && tx->sta->key) |
| 473 | tx->key = tx->sta->key; |
| 474 | else if (tx->sdata->default_key) |
| 475 | tx->key = tx->sdata->default_key; |
| 476 | else if (tx->sdata->drop_unencrypted && |
| 477 | !(tx->sdata->eapol && ieee80211_is_eapol(tx->skb))) { |
| 478 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unencrypted); |
| 479 | return TXRX_DROP; |
| 480 | } else |
| 481 | tx->key = NULL; |
| 482 | |
| 483 | if (tx->key) { |
| 484 | tx->key->tx_rx_count++; |
| 485 | if (unlikely(tx->local->key_tx_rx_threshold && |
| 486 | tx->key->tx_rx_count > |
| 487 | tx->local->key_tx_rx_threshold)) { |
| 488 | ieee80211_key_threshold_notify(tx->dev, tx->key, |
| 489 | tx->sta); |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | return TXRX_CONTINUE; |
| 494 | } |
| 495 | |
| 496 | |
| 497 | static ieee80211_txrx_result |
| 498 | ieee80211_tx_h_fragment(struct ieee80211_txrx_data *tx) |
| 499 | { |
| 500 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; |
| 501 | size_t hdrlen, per_fragm, num_fragm, payload_len, left; |
| 502 | struct sk_buff **frags, *first, *frag; |
| 503 | int i; |
| 504 | u16 seq; |
| 505 | u8 *pos; |
| 506 | int frag_threshold = tx->local->fragmentation_threshold; |
| 507 | |
| 508 | if (!tx->fragmented) |
| 509 | return TXRX_CONTINUE; |
| 510 | |
| 511 | first = tx->skb; |
| 512 | |
| 513 | hdrlen = ieee80211_get_hdrlen(tx->fc); |
| 514 | payload_len = first->len - hdrlen; |
| 515 | per_fragm = frag_threshold - hdrlen - FCS_LEN; |
| 516 | num_fragm = (payload_len + per_fragm - 1) / per_fragm; |
| 517 | |
| 518 | frags = kzalloc(num_fragm * sizeof(struct sk_buff *), GFP_ATOMIC); |
| 519 | if (!frags) |
| 520 | goto fail; |
| 521 | |
| 522 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREFRAGS); |
| 523 | seq = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ; |
| 524 | pos = first->data + hdrlen + per_fragm; |
| 525 | left = payload_len - per_fragm; |
| 526 | for (i = 0; i < num_fragm - 1; i++) { |
| 527 | struct ieee80211_hdr *fhdr; |
| 528 | size_t copylen; |
| 529 | |
| 530 | if (left <= 0) |
| 531 | goto fail; |
| 532 | |
| 533 | /* reserve enough extra head and tail room for possible |
| 534 | * encryption */ |
| 535 | frag = frags[i] = |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 536 | dev_alloc_skb(tx->local->tx_headroom + |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 537 | frag_threshold + |
| 538 | IEEE80211_ENCRYPT_HEADROOM + |
| 539 | IEEE80211_ENCRYPT_TAILROOM); |
| 540 | if (!frag) |
| 541 | goto fail; |
| 542 | /* Make sure that all fragments use the same priority so |
| 543 | * that they end up using the same TX queue */ |
| 544 | frag->priority = first->priority; |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 545 | skb_reserve(frag, tx->local->tx_headroom + |
| 546 | IEEE80211_ENCRYPT_HEADROOM); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 547 | fhdr = (struct ieee80211_hdr *) skb_put(frag, hdrlen); |
| 548 | memcpy(fhdr, first->data, hdrlen); |
| 549 | if (i == num_fragm - 2) |
| 550 | fhdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREFRAGS); |
| 551 | fhdr->seq_ctrl = cpu_to_le16(seq | ((i + 1) & IEEE80211_SCTL_FRAG)); |
| 552 | copylen = left > per_fragm ? per_fragm : left; |
| 553 | memcpy(skb_put(frag, copylen), pos, copylen); |
| 554 | |
| 555 | pos += copylen; |
| 556 | left -= copylen; |
| 557 | } |
| 558 | skb_trim(first, hdrlen + per_fragm); |
| 559 | |
| 560 | tx->u.tx.num_extra_frag = num_fragm - 1; |
| 561 | tx->u.tx.extra_frag = frags; |
| 562 | |
| 563 | return TXRX_CONTINUE; |
| 564 | |
| 565 | fail: |
| 566 | printk(KERN_DEBUG "%s: failed to fragment frame\n", tx->dev->name); |
| 567 | if (frags) { |
| 568 | for (i = 0; i < num_fragm - 1; i++) |
| 569 | if (frags[i]) |
| 570 | dev_kfree_skb(frags[i]); |
| 571 | kfree(frags); |
| 572 | } |
| 573 | I802_DEBUG_INC(tx->local->tx_handlers_drop_fragment); |
| 574 | return TXRX_DROP; |
| 575 | } |
| 576 | |
| 577 | |
| 578 | static int wep_encrypt_skb(struct ieee80211_txrx_data *tx, struct sk_buff *skb) |
| 579 | { |
| 580 | if (tx->key->force_sw_encrypt) { |
| 581 | if (ieee80211_wep_encrypt(tx->local, skb, tx->key)) |
| 582 | return -1; |
| 583 | } else { |
| 584 | tx->u.tx.control->key_idx = tx->key->hw_key_idx; |
| 585 | if (tx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { |
| 586 | if (ieee80211_wep_add_iv(tx->local, skb, tx->key) == |
| 587 | NULL) |
| 588 | return -1; |
| 589 | } |
| 590 | } |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | |
| 595 | void ieee80211_tx_set_iswep(struct ieee80211_txrx_data *tx) |
| 596 | { |
| 597 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; |
| 598 | |
| 599 | hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| 600 | if (tx->u.tx.extra_frag) { |
| 601 | struct ieee80211_hdr *fhdr; |
| 602 | int i; |
| 603 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { |
| 604 | fhdr = (struct ieee80211_hdr *) |
| 605 | tx->u.tx.extra_frag[i]->data; |
| 606 | fhdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED); |
| 607 | } |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | |
| 612 | static ieee80211_txrx_result |
| 613 | ieee80211_tx_h_wep_encrypt(struct ieee80211_txrx_data *tx) |
| 614 | { |
| 615 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; |
| 616 | u16 fc; |
| 617 | |
| 618 | fc = le16_to_cpu(hdr->frame_control); |
| 619 | |
| 620 | if (!tx->key || tx->key->alg != ALG_WEP || |
| 621 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && |
| 622 | ((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || |
| 623 | (fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH))) |
| 624 | return TXRX_CONTINUE; |
| 625 | |
| 626 | tx->u.tx.control->iv_len = WEP_IV_LEN; |
| 627 | tx->u.tx.control->icv_len = WEP_ICV_LEN; |
| 628 | ieee80211_tx_set_iswep(tx); |
| 629 | |
| 630 | if (wep_encrypt_skb(tx, tx->skb) < 0) { |
| 631 | I802_DEBUG_INC(tx->local->tx_handlers_drop_wep); |
| 632 | return TXRX_DROP; |
| 633 | } |
| 634 | |
| 635 | if (tx->u.tx.extra_frag) { |
| 636 | int i; |
| 637 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { |
| 638 | if (wep_encrypt_skb(tx, tx->u.tx.extra_frag[i]) < 0) { |
| 639 | I802_DEBUG_INC(tx->local-> |
| 640 | tx_handlers_drop_wep); |
| 641 | return TXRX_DROP; |
| 642 | } |
| 643 | } |
| 644 | } |
| 645 | |
| 646 | return TXRX_CONTINUE; |
| 647 | } |
| 648 | |
| 649 | |
| 650 | static int ieee80211_frame_duration(struct ieee80211_local *local, size_t len, |
| 651 | int rate, int erp, int short_preamble) |
| 652 | { |
| 653 | int dur; |
| 654 | |
| 655 | /* calculate duration (in microseconds, rounded up to next higher |
| 656 | * integer if it includes a fractional microsecond) to send frame of |
| 657 | * len bytes (does not include FCS) at the given rate. Duration will |
| 658 | * also include SIFS. |
| 659 | * |
| 660 | * rate is in 100 kbps, so divident is multiplied by 10 in the |
| 661 | * DIV_ROUND_UP() operations. |
| 662 | */ |
| 663 | |
| 664 | if (local->hw.conf.phymode == MODE_IEEE80211A || erp || |
| 665 | local->hw.conf.phymode == MODE_ATHEROS_TURBO) { |
| 666 | /* |
| 667 | * OFDM: |
| 668 | * |
| 669 | * N_DBPS = DATARATE x 4 |
| 670 | * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS) |
| 671 | * (16 = SIGNAL time, 6 = tail bits) |
| 672 | * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext |
| 673 | * |
| 674 | * T_SYM = 4 usec |
| 675 | * 802.11a - 17.5.2: aSIFSTime = 16 usec |
| 676 | * 802.11g - 19.8.4: aSIFSTime = 10 usec + |
| 677 | * signal ext = 6 usec |
| 678 | */ |
| 679 | /* FIX: Atheros Turbo may have different (shorter) duration? */ |
| 680 | dur = 16; /* SIFS + signal ext */ |
| 681 | dur += 16; /* 17.3.2.3: T_PREAMBLE = 16 usec */ |
| 682 | dur += 4; /* 17.3.2.3: T_SIGNAL = 4 usec */ |
| 683 | dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10, |
| 684 | 4 * rate); /* T_SYM x N_SYM */ |
| 685 | } else { |
| 686 | /* |
| 687 | * 802.11b or 802.11g with 802.11b compatibility: |
| 688 | * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime + |
| 689 | * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0. |
| 690 | * |
| 691 | * 802.11 (DS): 15.3.3, 802.11b: 18.3.4 |
| 692 | * aSIFSTime = 10 usec |
| 693 | * aPreambleLength = 144 usec or 72 usec with short preamble |
| 694 | * aPLCPHeaderLength = 48 usec or 24 usec with short preamble |
| 695 | */ |
| 696 | dur = 10; /* aSIFSTime = 10 usec */ |
| 697 | dur += short_preamble ? (72 + 24) : (144 + 48); |
| 698 | |
| 699 | dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate); |
| 700 | } |
| 701 | |
| 702 | return dur; |
| 703 | } |
| 704 | |
| 705 | |
| 706 | /* Exported duration function for driver use */ |
| 707 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
| 708 | size_t frame_len, int rate) |
| 709 | { |
| 710 | struct ieee80211_local *local = hw_to_local(hw); |
| 711 | u16 dur; |
| 712 | int erp; |
| 713 | |
| 714 | erp = ieee80211_is_erp_rate(hw->conf.phymode, rate); |
| 715 | dur = ieee80211_frame_duration(local, frame_len, rate, |
| 716 | erp, local->short_preamble); |
| 717 | |
| 718 | return cpu_to_le16(dur); |
| 719 | } |
| 720 | EXPORT_SYMBOL(ieee80211_generic_frame_duration); |
| 721 | |
| 722 | |
| 723 | static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr, |
| 724 | int next_frag_len) |
| 725 | { |
| 726 | int rate, mrate, erp, dur, i; |
| 727 | struct ieee80211_rate *txrate = tx->u.tx.rate; |
| 728 | struct ieee80211_local *local = tx->local; |
| 729 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; |
| 730 | |
| 731 | erp = txrate->flags & IEEE80211_RATE_ERP; |
| 732 | |
| 733 | /* |
| 734 | * data and mgmt (except PS Poll): |
| 735 | * - during CFP: 32768 |
| 736 | * - during contention period: |
| 737 | * if addr1 is group address: 0 |
| 738 | * if more fragments = 0 and addr1 is individual address: time to |
| 739 | * transmit one ACK plus SIFS |
| 740 | * if more fragments = 1 and addr1 is individual address: time to |
| 741 | * transmit next fragment plus 2 x ACK plus 3 x SIFS |
| 742 | * |
| 743 | * IEEE 802.11, 9.6: |
| 744 | * - control response frame (CTS or ACK) shall be transmitted using the |
| 745 | * same rate as the immediately previous frame in the frame exchange |
| 746 | * sequence, if this rate belongs to the PHY mandatory rates, or else |
| 747 | * at the highest possible rate belonging to the PHY rates in the |
| 748 | * BSSBasicRateSet |
| 749 | */ |
| 750 | |
| 751 | if ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) { |
| 752 | /* TODO: These control frames are not currently sent by |
| 753 | * 80211.o, but should they be implemented, this function |
| 754 | * needs to be updated to support duration field calculation. |
| 755 | * |
| 756 | * RTS: time needed to transmit pending data/mgmt frame plus |
| 757 | * one CTS frame plus one ACK frame plus 3 x SIFS |
| 758 | * CTS: duration of immediately previous RTS minus time |
| 759 | * required to transmit CTS and its SIFS |
| 760 | * ACK: 0 if immediately previous directed data/mgmt had |
| 761 | * more=0, with more=1 duration in ACK frame is duration |
| 762 | * from previous frame minus time needed to transmit ACK |
| 763 | * and its SIFS |
| 764 | * PS Poll: BIT(15) | BIT(14) | aid |
| 765 | */ |
| 766 | return 0; |
| 767 | } |
| 768 | |
| 769 | /* data/mgmt */ |
| 770 | if (0 /* FIX: data/mgmt during CFP */) |
| 771 | return 32768; |
| 772 | |
| 773 | if (group_addr) /* Group address as the destination - no ACK */ |
| 774 | return 0; |
| 775 | |
| 776 | /* Individual destination address: |
| 777 | * IEEE 802.11, Ch. 9.6 (after IEEE 802.11g changes) |
| 778 | * CTS and ACK frames shall be transmitted using the highest rate in |
| 779 | * basic rate set that is less than or equal to the rate of the |
| 780 | * immediately previous frame and that is using the same modulation |
| 781 | * (CCK or OFDM). If no basic rate set matches with these requirements, |
| 782 | * the highest mandatory rate of the PHY that is less than or equal to |
| 783 | * the rate of the previous frame is used. |
| 784 | * Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps |
| 785 | */ |
| 786 | rate = -1; |
| 787 | mrate = 10; /* use 1 Mbps if everything fails */ |
| 788 | for (i = 0; i < mode->num_rates; i++) { |
| 789 | struct ieee80211_rate *r = &mode->rates[i]; |
| 790 | if (r->rate > txrate->rate) |
| 791 | break; |
| 792 | |
| 793 | if (IEEE80211_RATE_MODULATION(txrate->flags) != |
| 794 | IEEE80211_RATE_MODULATION(r->flags)) |
| 795 | continue; |
| 796 | |
| 797 | if (r->flags & IEEE80211_RATE_BASIC) |
| 798 | rate = r->rate; |
| 799 | else if (r->flags & IEEE80211_RATE_MANDATORY) |
| 800 | mrate = r->rate; |
| 801 | } |
| 802 | if (rate == -1) { |
| 803 | /* No matching basic rate found; use highest suitable mandatory |
| 804 | * PHY rate */ |
| 805 | rate = mrate; |
| 806 | } |
| 807 | |
| 808 | /* Time needed to transmit ACK |
| 809 | * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up |
| 810 | * to closest integer */ |
| 811 | |
| 812 | dur = ieee80211_frame_duration(local, 10, rate, erp, |
| 813 | local->short_preamble); |
| 814 | |
| 815 | if (next_frag_len) { |
| 816 | /* Frame is fragmented: duration increases with time needed to |
| 817 | * transmit next fragment plus ACK and 2 x SIFS. */ |
| 818 | dur *= 2; /* ACK + SIFS */ |
| 819 | /* next fragment */ |
| 820 | dur += ieee80211_frame_duration(local, next_frag_len, |
| 821 | txrate->rate, erp, |
| 822 | local->short_preamble); |
| 823 | } |
| 824 | |
| 825 | return dur; |
| 826 | } |
| 827 | |
| 828 | |
| 829 | static ieee80211_txrx_result |
| 830 | ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx) |
| 831 | { |
| 832 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) tx->skb->data; |
| 833 | u16 dur; |
| 834 | struct ieee80211_tx_control *control = tx->u.tx.control; |
| 835 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; |
| 836 | |
| 837 | if (!is_multicast_ether_addr(hdr->addr1)) { |
| 838 | if (tx->skb->len + FCS_LEN > tx->local->rts_threshold && |
| 839 | tx->local->rts_threshold < IEEE80211_MAX_RTS_THRESHOLD) { |
| 840 | control->flags |= IEEE80211_TXCTL_USE_RTS_CTS; |
| 841 | control->retry_limit = |
| 842 | tx->local->long_retry_limit; |
| 843 | } else { |
| 844 | control->retry_limit = |
| 845 | tx->local->short_retry_limit; |
| 846 | } |
| 847 | } else { |
| 848 | control->retry_limit = 1; |
| 849 | } |
| 850 | |
| 851 | if (tx->fragmented) { |
| 852 | /* Do not use multiple retry rates when sending fragmented |
| 853 | * frames. |
| 854 | * TODO: The last fragment could still use multiple retry |
| 855 | * rates. */ |
| 856 | control->alt_retry_rate = -1; |
| 857 | } |
| 858 | |
| 859 | /* Use CTS protection for unicast frames sent using extended rates if |
| 860 | * there are associated non-ERP stations and RTS/CTS is not configured |
| 861 | * for the frame. */ |
| 862 | if (mode->mode == MODE_IEEE80211G && |
| 863 | (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) && |
Daniel Drake | 63fc33c | 2007-07-10 19:32:11 +0200 | [diff] [blame] | 864 | tx->u.tx.unicast && tx->sdata->use_protection && |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 865 | !(control->flags & IEEE80211_TXCTL_USE_RTS_CTS)) |
| 866 | control->flags |= IEEE80211_TXCTL_USE_CTS_PROTECT; |
| 867 | |
| 868 | /* Setup duration field for the first fragment of the frame. Duration |
| 869 | * for remaining fragments will be updated when they are being sent |
| 870 | * to low-level driver in ieee80211_tx(). */ |
| 871 | dur = ieee80211_duration(tx, is_multicast_ether_addr(hdr->addr1), |
| 872 | tx->fragmented ? tx->u.tx.extra_frag[0]->len : |
| 873 | 0); |
| 874 | hdr->duration_id = cpu_to_le16(dur); |
| 875 | |
| 876 | if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) || |
| 877 | (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) { |
| 878 | struct ieee80211_rate *rate; |
| 879 | |
| 880 | /* Do not use multiple retry rates when using RTS/CTS */ |
| 881 | control->alt_retry_rate = -1; |
| 882 | |
| 883 | /* Use min(data rate, max base rate) as CTS/RTS rate */ |
| 884 | rate = tx->u.tx.rate; |
| 885 | while (rate > mode->rates && |
| 886 | !(rate->flags & IEEE80211_RATE_BASIC)) |
| 887 | rate--; |
| 888 | |
| 889 | control->rts_cts_rate = rate->val; |
| 890 | control->rts_rate = rate; |
| 891 | } |
| 892 | |
| 893 | if (tx->sta) { |
| 894 | tx->sta->tx_packets++; |
| 895 | tx->sta->tx_fragments++; |
| 896 | tx->sta->tx_bytes += tx->skb->len; |
| 897 | if (tx->u.tx.extra_frag) { |
| 898 | int i; |
| 899 | tx->sta->tx_fragments += tx->u.tx.num_extra_frag; |
| 900 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { |
| 901 | tx->sta->tx_bytes += |
| 902 | tx->u.tx.extra_frag[i]->len; |
| 903 | } |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | return TXRX_CONTINUE; |
| 908 | } |
| 909 | |
| 910 | |
| 911 | static ieee80211_txrx_result |
| 912 | ieee80211_tx_h_check_assoc(struct ieee80211_txrx_data *tx) |
| 913 | { |
| 914 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 915 | struct sk_buff *skb = tx->skb; |
| 916 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 917 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 918 | u32 sta_flags; |
| 919 | |
| 920 | if (unlikely(tx->local->sta_scanning != 0) && |
| 921 | ((tx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || |
| 922 | (tx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_PROBE_REQ)) |
| 923 | return TXRX_DROP; |
| 924 | |
| 925 | if (tx->u.tx.ps_buffered) |
| 926 | return TXRX_CONTINUE; |
| 927 | |
| 928 | sta_flags = tx->sta ? tx->sta->flags : 0; |
| 929 | |
| 930 | if (likely(tx->u.tx.unicast)) { |
| 931 | if (unlikely(!(sta_flags & WLAN_STA_ASSOC) && |
| 932 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS && |
| 933 | (tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA)) { |
| 934 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 935 | printk(KERN_DEBUG "%s: dropped data frame to not " |
| 936 | "associated station " MAC_FMT "\n", |
| 937 | tx->dev->name, MAC_ARG(hdr->addr1)); |
| 938 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 939 | I802_DEBUG_INC(tx->local->tx_handlers_drop_not_assoc); |
| 940 | return TXRX_DROP; |
| 941 | } |
| 942 | } else { |
| 943 | if (unlikely((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA && |
| 944 | tx->local->num_sta == 0 && |
| 945 | !tx->local->allow_broadcast_always && |
| 946 | tx->sdata->type != IEEE80211_IF_TYPE_IBSS)) { |
| 947 | /* |
| 948 | * No associated STAs - no need to send multicast |
| 949 | * frames. |
| 950 | */ |
| 951 | return TXRX_DROP; |
| 952 | } |
| 953 | return TXRX_CONTINUE; |
| 954 | } |
| 955 | |
| 956 | if (unlikely(!tx->u.tx.mgmt_interface && tx->sdata->ieee802_1x && |
| 957 | !(sta_flags & WLAN_STA_AUTHORIZED))) { |
| 958 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 959 | printk(KERN_DEBUG "%s: dropped frame to " MAC_FMT |
| 960 | " (unauthorized port)\n", tx->dev->name, |
| 961 | MAC_ARG(hdr->addr1)); |
| 962 | #endif |
| 963 | I802_DEBUG_INC(tx->local->tx_handlers_drop_unauth_port); |
| 964 | return TXRX_DROP; |
| 965 | } |
| 966 | |
| 967 | return TXRX_CONTINUE; |
| 968 | } |
| 969 | |
| 970 | static ieee80211_txrx_result |
| 971 | ieee80211_tx_h_sequence(struct ieee80211_txrx_data *tx) |
| 972 | { |
| 973 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)tx->skb->data; |
| 974 | |
| 975 | if (ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control)) >= 24) |
| 976 | ieee80211_include_sequence(tx->sdata, hdr); |
| 977 | |
| 978 | return TXRX_CONTINUE; |
| 979 | } |
| 980 | |
| 981 | /* This function is called whenever the AP is about to exceed the maximum limit |
| 982 | * of buffered frames for power saving STAs. This situation should not really |
| 983 | * happen often during normal operation, so dropping the oldest buffered packet |
| 984 | * from each queue should be OK to make some room for new frames. */ |
| 985 | static void purge_old_ps_buffers(struct ieee80211_local *local) |
| 986 | { |
| 987 | int total = 0, purged = 0; |
| 988 | struct sk_buff *skb; |
| 989 | struct ieee80211_sub_if_data *sdata; |
| 990 | struct sta_info *sta; |
| 991 | |
| 992 | read_lock(&local->sub_if_lock); |
| 993 | list_for_each_entry(sdata, &local->sub_if_list, list) { |
| 994 | struct ieee80211_if_ap *ap; |
| 995 | if (sdata->dev == local->mdev || |
| 996 | sdata->type != IEEE80211_IF_TYPE_AP) |
| 997 | continue; |
| 998 | ap = &sdata->u.ap; |
| 999 | skb = skb_dequeue(&ap->ps_bc_buf); |
| 1000 | if (skb) { |
| 1001 | purged++; |
| 1002 | dev_kfree_skb(skb); |
| 1003 | } |
| 1004 | total += skb_queue_len(&ap->ps_bc_buf); |
| 1005 | } |
| 1006 | read_unlock(&local->sub_if_lock); |
| 1007 | |
| 1008 | spin_lock_bh(&local->sta_lock); |
| 1009 | list_for_each_entry(sta, &local->sta_list, list) { |
| 1010 | skb = skb_dequeue(&sta->ps_tx_buf); |
| 1011 | if (skb) { |
| 1012 | purged++; |
| 1013 | dev_kfree_skb(skb); |
| 1014 | } |
| 1015 | total += skb_queue_len(&sta->ps_tx_buf); |
| 1016 | } |
| 1017 | spin_unlock_bh(&local->sta_lock); |
| 1018 | |
| 1019 | local->total_ps_buffered = total; |
| 1020 | printk(KERN_DEBUG "%s: PS buffers full - purged %d frames\n", |
| 1021 | local->mdev->name, purged); |
| 1022 | } |
| 1023 | |
| 1024 | |
| 1025 | static inline ieee80211_txrx_result |
| 1026 | ieee80211_tx_h_multicast_ps_buf(struct ieee80211_txrx_data *tx) |
| 1027 | { |
| 1028 | /* broadcast/multicast frame */ |
| 1029 | /* If any of the associated stations is in power save mode, |
| 1030 | * the frame is buffered to be sent after DTIM beacon frame */ |
| 1031 | if ((tx->local->hw.flags & IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING) && |
| 1032 | tx->sdata->type != IEEE80211_IF_TYPE_WDS && |
| 1033 | tx->sdata->bss && atomic_read(&tx->sdata->bss->num_sta_ps) && |
| 1034 | !(tx->fc & IEEE80211_FCTL_ORDER)) { |
| 1035 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
| 1036 | purge_old_ps_buffers(tx->local); |
| 1037 | if (skb_queue_len(&tx->sdata->bss->ps_bc_buf) >= |
| 1038 | AP_MAX_BC_BUFFER) { |
| 1039 | if (net_ratelimit()) { |
| 1040 | printk(KERN_DEBUG "%s: BC TX buffer full - " |
| 1041 | "dropping the oldest frame\n", |
| 1042 | tx->dev->name); |
| 1043 | } |
| 1044 | dev_kfree_skb(skb_dequeue(&tx->sdata->bss->ps_bc_buf)); |
| 1045 | } else |
| 1046 | tx->local->total_ps_buffered++; |
| 1047 | skb_queue_tail(&tx->sdata->bss->ps_bc_buf, tx->skb); |
| 1048 | return TXRX_QUEUED; |
| 1049 | } |
| 1050 | |
| 1051 | return TXRX_CONTINUE; |
| 1052 | } |
| 1053 | |
| 1054 | |
| 1055 | static inline ieee80211_txrx_result |
| 1056 | ieee80211_tx_h_unicast_ps_buf(struct ieee80211_txrx_data *tx) |
| 1057 | { |
| 1058 | struct sta_info *sta = tx->sta; |
| 1059 | |
| 1060 | if (unlikely(!sta || |
| 1061 | ((tx->fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT && |
| 1062 | (tx->fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP))) |
| 1063 | return TXRX_CONTINUE; |
| 1064 | |
| 1065 | if (unlikely((sta->flags & WLAN_STA_PS) && !sta->pspoll)) { |
| 1066 | struct ieee80211_tx_packet_data *pkt_data; |
| 1067 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
| 1068 | printk(KERN_DEBUG "STA " MAC_FMT " aid %d: PS buffer (entries " |
| 1069 | "before %d)\n", |
| 1070 | MAC_ARG(sta->addr), sta->aid, |
| 1071 | skb_queue_len(&sta->ps_tx_buf)); |
| 1072 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
| 1073 | sta->flags |= WLAN_STA_TIM; |
| 1074 | if (tx->local->total_ps_buffered >= TOTAL_MAX_TX_BUFFER) |
| 1075 | purge_old_ps_buffers(tx->local); |
| 1076 | if (skb_queue_len(&sta->ps_tx_buf) >= STA_MAX_TX_BUFFER) { |
| 1077 | struct sk_buff *old = skb_dequeue(&sta->ps_tx_buf); |
| 1078 | if (net_ratelimit()) { |
| 1079 | printk(KERN_DEBUG "%s: STA " MAC_FMT " TX " |
| 1080 | "buffer full - dropping oldest frame\n", |
| 1081 | tx->dev->name, MAC_ARG(sta->addr)); |
| 1082 | } |
| 1083 | dev_kfree_skb(old); |
| 1084 | } else |
| 1085 | tx->local->total_ps_buffered++; |
| 1086 | /* Queue frame to be sent after STA sends an PS Poll frame */ |
| 1087 | if (skb_queue_empty(&sta->ps_tx_buf)) { |
| 1088 | if (tx->local->ops->set_tim) |
| 1089 | tx->local->ops->set_tim(local_to_hw(tx->local), |
| 1090 | sta->aid, 1); |
| 1091 | if (tx->sdata->bss) |
| 1092 | bss_tim_set(tx->local, tx->sdata->bss, sta->aid); |
| 1093 | } |
| 1094 | pkt_data = (struct ieee80211_tx_packet_data *)tx->skb->cb; |
| 1095 | pkt_data->jiffies = jiffies; |
| 1096 | skb_queue_tail(&sta->ps_tx_buf, tx->skb); |
| 1097 | return TXRX_QUEUED; |
| 1098 | } |
| 1099 | #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG |
| 1100 | else if (unlikely(sta->flags & WLAN_STA_PS)) { |
| 1101 | printk(KERN_DEBUG "%s: STA " MAC_FMT " in PS mode, but pspoll " |
| 1102 | "set -> send frame\n", tx->dev->name, |
| 1103 | MAC_ARG(sta->addr)); |
| 1104 | } |
| 1105 | #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |
| 1106 | sta->pspoll = 0; |
| 1107 | |
| 1108 | return TXRX_CONTINUE; |
| 1109 | } |
| 1110 | |
| 1111 | |
| 1112 | static ieee80211_txrx_result |
| 1113 | ieee80211_tx_h_ps_buf(struct ieee80211_txrx_data *tx) |
| 1114 | { |
| 1115 | if (unlikely(tx->u.tx.ps_buffered)) |
| 1116 | return TXRX_CONTINUE; |
| 1117 | |
| 1118 | if (tx->u.tx.unicast) |
| 1119 | return ieee80211_tx_h_unicast_ps_buf(tx); |
| 1120 | else |
| 1121 | return ieee80211_tx_h_multicast_ps_buf(tx); |
| 1122 | } |
| 1123 | |
| 1124 | |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1125 | /* |
| 1126 | * deal with packet injection down monitor interface |
| 1127 | * with Radiotap Header -- only called for monitor mode interface |
| 1128 | */ |
| 1129 | |
| 1130 | static ieee80211_txrx_result |
| 1131 | __ieee80211_parse_tx_radiotap( |
| 1132 | struct ieee80211_txrx_data *tx, |
| 1133 | struct sk_buff *skb, struct ieee80211_tx_control *control) |
| 1134 | { |
| 1135 | /* |
| 1136 | * this is the moment to interpret and discard the radiotap header that |
| 1137 | * must be at the start of the packet injected in Monitor mode |
| 1138 | * |
| 1139 | * Need to take some care with endian-ness since radiotap |
| 1140 | * args are little-endian |
| 1141 | */ |
| 1142 | |
| 1143 | struct ieee80211_radiotap_iterator iterator; |
| 1144 | struct ieee80211_radiotap_header *rthdr = |
| 1145 | (struct ieee80211_radiotap_header *) skb->data; |
| 1146 | struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode; |
| 1147 | int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len); |
| 1148 | |
| 1149 | /* |
| 1150 | * default control situation for all injected packets |
| 1151 | * FIXME: this does not suit all usage cases, expand to allow control |
| 1152 | */ |
| 1153 | |
| 1154 | control->retry_limit = 1; /* no retry */ |
| 1155 | control->key_idx = -1; /* no encryption key */ |
| 1156 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | |
| 1157 | IEEE80211_TXCTL_USE_CTS_PROTECT); |
| 1158 | control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT | |
| 1159 | IEEE80211_TXCTL_NO_ACK; |
| 1160 | control->antenna_sel_tx = 0; /* default to default antenna */ |
| 1161 | |
| 1162 | /* |
| 1163 | * for every radiotap entry that is present |
| 1164 | * (ieee80211_radiotap_iterator_next returns -ENOENT when no more |
| 1165 | * entries present, or -EINVAL on error) |
| 1166 | */ |
| 1167 | |
| 1168 | while (!ret) { |
| 1169 | int i, target_rate; |
| 1170 | |
| 1171 | ret = ieee80211_radiotap_iterator_next(&iterator); |
| 1172 | |
| 1173 | if (ret) |
| 1174 | continue; |
| 1175 | |
| 1176 | /* see if this argument is something we can use */ |
| 1177 | switch (iterator.this_arg_index) { |
| 1178 | /* |
| 1179 | * You must take care when dereferencing iterator.this_arg |
| 1180 | * for multibyte types... the pointer is not aligned. Use |
| 1181 | * get_unaligned((type *)iterator.this_arg) to dereference |
| 1182 | * iterator.this_arg for type "type" safely on all arches. |
| 1183 | */ |
| 1184 | case IEEE80211_RADIOTAP_RATE: |
| 1185 | /* |
| 1186 | * radiotap rate u8 is in 500kbps units eg, 0x02=1Mbps |
| 1187 | * ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps |
| 1188 | */ |
| 1189 | target_rate = (*iterator.this_arg) * 5; |
| 1190 | for (i = 0; i < mode->num_rates; i++) { |
| 1191 | struct ieee80211_rate *r = &mode->rates[i]; |
| 1192 | |
| 1193 | if (r->rate > target_rate) |
| 1194 | continue; |
| 1195 | |
| 1196 | control->rate = r; |
| 1197 | |
| 1198 | if (r->flags & IEEE80211_RATE_PREAMBLE2) |
| 1199 | control->tx_rate = r->val2; |
| 1200 | else |
| 1201 | control->tx_rate = r->val; |
| 1202 | |
| 1203 | /* end on exact match */ |
| 1204 | if (r->rate == target_rate) |
| 1205 | i = mode->num_rates; |
| 1206 | } |
| 1207 | break; |
| 1208 | |
| 1209 | case IEEE80211_RADIOTAP_ANTENNA: |
| 1210 | /* |
| 1211 | * radiotap uses 0 for 1st ant, mac80211 is 1 for |
| 1212 | * 1st ant |
| 1213 | */ |
| 1214 | control->antenna_sel_tx = (*iterator.this_arg) + 1; |
| 1215 | break; |
| 1216 | |
| 1217 | case IEEE80211_RADIOTAP_DBM_TX_POWER: |
| 1218 | control->power_level = *iterator.this_arg; |
| 1219 | break; |
| 1220 | |
| 1221 | case IEEE80211_RADIOTAP_FLAGS: |
| 1222 | if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) { |
| 1223 | /* |
| 1224 | * this indicates that the skb we have been |
| 1225 | * handed has the 32-bit FCS CRC at the end... |
| 1226 | * we should react to that by snipping it off |
| 1227 | * because it will be recomputed and added |
| 1228 | * on transmission |
| 1229 | */ |
| 1230 | if (skb->len < (iterator.max_length + FCS_LEN)) |
| 1231 | return TXRX_DROP; |
| 1232 | |
| 1233 | skb_trim(skb, skb->len - FCS_LEN); |
| 1234 | } |
| 1235 | break; |
| 1236 | |
| 1237 | default: |
| 1238 | break; |
| 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | if (ret != -ENOENT) /* ie, if we didn't simply run out of fields */ |
| 1243 | return TXRX_DROP; |
| 1244 | |
| 1245 | /* |
| 1246 | * remove the radiotap header |
| 1247 | * iterator->max_length was sanity-checked against |
| 1248 | * skb->len by iterator init |
| 1249 | */ |
| 1250 | skb_pull(skb, iterator.max_length); |
| 1251 | |
| 1252 | return TXRX_CONTINUE; |
| 1253 | } |
| 1254 | |
| 1255 | |
| 1256 | static ieee80211_txrx_result inline |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1257 | __ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, |
| 1258 | struct sk_buff *skb, |
| 1259 | struct net_device *dev, |
| 1260 | struct ieee80211_tx_control *control) |
| 1261 | { |
| 1262 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 1263 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1264 | struct ieee80211_sub_if_data *sdata; |
| 1265 | ieee80211_txrx_result res = TXRX_CONTINUE; |
| 1266 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1267 | int hdrlen; |
| 1268 | |
| 1269 | memset(tx, 0, sizeof(*tx)); |
| 1270 | tx->skb = skb; |
| 1271 | tx->dev = dev; /* use original interface */ |
| 1272 | tx->local = local; |
| 1273 | tx->sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1274 | tx->sta = sta_info_get(local, hdr->addr1); |
| 1275 | tx->fc = le16_to_cpu(hdr->frame_control); |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1276 | |
| 1277 | /* |
| 1278 | * set defaults for things that can be set by |
| 1279 | * injected radiotap headers |
| 1280 | */ |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1281 | control->power_level = local->hw.conf.power_level; |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1282 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; |
| 1283 | if (local->sta_antenna_sel != STA_ANTENNA_SEL_AUTO && tx->sta) |
| 1284 | control->antenna_sel_tx = tx->sta->antenna_sel_tx; |
| 1285 | |
| 1286 | /* process and remove the injection radiotap header */ |
| 1287 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1288 | if (unlikely(sdata->type == IEEE80211_IF_TYPE_MNTR)) { |
| 1289 | if (__ieee80211_parse_tx_radiotap(tx, skb, control) == |
| 1290 | TXRX_DROP) { |
| 1291 | return TXRX_DROP; |
| 1292 | } |
| 1293 | /* |
| 1294 | * we removed the radiotap header after this point, |
| 1295 | * we filled control with what we could use |
| 1296 | * set to the actual ieee header now |
| 1297 | */ |
| 1298 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1299 | res = TXRX_QUEUED; /* indication it was monitor packet */ |
| 1300 | } |
| 1301 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1302 | tx->u.tx.control = control; |
| 1303 | tx->u.tx.unicast = !is_multicast_ether_addr(hdr->addr1); |
| 1304 | if (is_multicast_ether_addr(hdr->addr1)) |
| 1305 | control->flags |= IEEE80211_TXCTL_NO_ACK; |
| 1306 | else |
| 1307 | control->flags &= ~IEEE80211_TXCTL_NO_ACK; |
| 1308 | tx->fragmented = local->fragmentation_threshold < |
| 1309 | IEEE80211_MAX_FRAG_THRESHOLD && tx->u.tx.unicast && |
| 1310 | skb->len + FCS_LEN > local->fragmentation_threshold && |
| 1311 | (!local->ops->set_frag_threshold); |
| 1312 | if (!tx->sta) |
| 1313 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; |
| 1314 | else if (tx->sta->clear_dst_mask) { |
| 1315 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; |
| 1316 | tx->sta->clear_dst_mask = 0; |
| 1317 | } |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1318 | hdrlen = ieee80211_get_hdrlen(tx->fc); |
| 1319 | if (skb->len > hdrlen + sizeof(rfc1042_header) + 2) { |
| 1320 | u8 *pos = &skb->data[hdrlen + sizeof(rfc1042_header)]; |
| 1321 | tx->ethertype = (pos[0] << 8) | pos[1]; |
| 1322 | } |
| 1323 | control->flags |= IEEE80211_TXCTL_FIRST_FRAGMENT; |
| 1324 | |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1325 | return res; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1326 | } |
| 1327 | |
| 1328 | static int inline is_ieee80211_device(struct net_device *dev, |
| 1329 | struct net_device *master) |
| 1330 | { |
| 1331 | return (wdev_priv(dev->ieee80211_ptr) == |
| 1332 | wdev_priv(master->ieee80211_ptr)); |
| 1333 | } |
| 1334 | |
| 1335 | /* Device in tx->dev has a reference added; use dev_put(tx->dev) when |
| 1336 | * finished with it. */ |
| 1337 | static int inline ieee80211_tx_prepare(struct ieee80211_txrx_data *tx, |
| 1338 | struct sk_buff *skb, |
| 1339 | struct net_device *mdev, |
| 1340 | struct ieee80211_tx_control *control) |
| 1341 | { |
| 1342 | struct ieee80211_tx_packet_data *pkt_data; |
| 1343 | struct net_device *dev; |
| 1344 | |
| 1345 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; |
| 1346 | dev = dev_get_by_index(pkt_data->ifindex); |
| 1347 | if (unlikely(dev && !is_ieee80211_device(dev, mdev))) { |
| 1348 | dev_put(dev); |
| 1349 | dev = NULL; |
| 1350 | } |
| 1351 | if (unlikely(!dev)) |
| 1352 | return -ENODEV; |
| 1353 | __ieee80211_tx_prepare(tx, skb, dev, control); |
| 1354 | return 0; |
| 1355 | } |
| 1356 | |
| 1357 | static inline int __ieee80211_queue_stopped(const struct ieee80211_local *local, |
| 1358 | int queue) |
| 1359 | { |
| 1360 | return test_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); |
| 1361 | } |
| 1362 | |
| 1363 | static inline int __ieee80211_queue_pending(const struct ieee80211_local *local, |
| 1364 | int queue) |
| 1365 | { |
| 1366 | return test_bit(IEEE80211_LINK_STATE_PENDING, &local->state[queue]); |
| 1367 | } |
| 1368 | |
| 1369 | #define IEEE80211_TX_OK 0 |
| 1370 | #define IEEE80211_TX_AGAIN 1 |
| 1371 | #define IEEE80211_TX_FRAG_AGAIN 2 |
| 1372 | |
| 1373 | static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb, |
| 1374 | struct ieee80211_txrx_data *tx) |
| 1375 | { |
| 1376 | struct ieee80211_tx_control *control = tx->u.tx.control; |
| 1377 | int ret, i; |
| 1378 | |
| 1379 | if (!ieee80211_qdisc_installed(local->mdev) && |
| 1380 | __ieee80211_queue_stopped(local, 0)) { |
| 1381 | netif_stop_queue(local->mdev); |
| 1382 | return IEEE80211_TX_AGAIN; |
| 1383 | } |
| 1384 | if (skb) { |
| 1385 | ieee80211_dump_frame(local->mdev->name, "TX to low-level driver", skb); |
| 1386 | ret = local->ops->tx(local_to_hw(local), skb, control); |
| 1387 | if (ret) |
| 1388 | return IEEE80211_TX_AGAIN; |
| 1389 | local->mdev->trans_start = jiffies; |
| 1390 | ieee80211_led_tx(local, 1); |
| 1391 | } |
| 1392 | if (tx->u.tx.extra_frag) { |
| 1393 | control->flags &= ~(IEEE80211_TXCTL_USE_RTS_CTS | |
| 1394 | IEEE80211_TXCTL_USE_CTS_PROTECT | |
| 1395 | IEEE80211_TXCTL_CLEAR_DST_MASK | |
| 1396 | IEEE80211_TXCTL_FIRST_FRAGMENT); |
| 1397 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { |
| 1398 | if (!tx->u.tx.extra_frag[i]) |
| 1399 | continue; |
| 1400 | if (__ieee80211_queue_stopped(local, control->queue)) |
| 1401 | return IEEE80211_TX_FRAG_AGAIN; |
| 1402 | if (i == tx->u.tx.num_extra_frag) { |
| 1403 | control->tx_rate = tx->u.tx.last_frag_hwrate; |
| 1404 | control->rate = tx->u.tx.last_frag_rate; |
| 1405 | if (tx->u.tx.probe_last_frag) |
| 1406 | control->flags |= |
| 1407 | IEEE80211_TXCTL_RATE_CTRL_PROBE; |
| 1408 | else |
| 1409 | control->flags &= |
| 1410 | ~IEEE80211_TXCTL_RATE_CTRL_PROBE; |
| 1411 | } |
| 1412 | |
| 1413 | ieee80211_dump_frame(local->mdev->name, |
| 1414 | "TX to low-level driver", |
| 1415 | tx->u.tx.extra_frag[i]); |
| 1416 | ret = local->ops->tx(local_to_hw(local), |
| 1417 | tx->u.tx.extra_frag[i], |
| 1418 | control); |
| 1419 | if (ret) |
| 1420 | return IEEE80211_TX_FRAG_AGAIN; |
| 1421 | local->mdev->trans_start = jiffies; |
| 1422 | ieee80211_led_tx(local, 1); |
| 1423 | tx->u.tx.extra_frag[i] = NULL; |
| 1424 | } |
| 1425 | kfree(tx->u.tx.extra_frag); |
| 1426 | tx->u.tx.extra_frag = NULL; |
| 1427 | } |
| 1428 | return IEEE80211_TX_OK; |
| 1429 | } |
| 1430 | |
| 1431 | static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb, |
| 1432 | struct ieee80211_tx_control *control, int mgmt) |
| 1433 | { |
| 1434 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 1435 | struct sta_info *sta; |
| 1436 | ieee80211_tx_handler *handler; |
| 1437 | struct ieee80211_txrx_data tx; |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1438 | ieee80211_txrx_result res = TXRX_DROP, res_prepare; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1439 | int ret, i; |
| 1440 | |
| 1441 | WARN_ON(__ieee80211_queue_pending(local, control->queue)); |
| 1442 | |
| 1443 | if (unlikely(skb->len < 10)) { |
| 1444 | dev_kfree_skb(skb); |
| 1445 | return 0; |
| 1446 | } |
| 1447 | |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1448 | res_prepare = __ieee80211_tx_prepare(&tx, skb, dev, control); |
| 1449 | |
| 1450 | if (res_prepare == TXRX_DROP) { |
| 1451 | dev_kfree_skb(skb); |
| 1452 | return 0; |
| 1453 | } |
| 1454 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1455 | sta = tx.sta; |
| 1456 | tx.u.tx.mgmt_interface = mgmt; |
| 1457 | tx.u.tx.mode = local->hw.conf.mode; |
| 1458 | |
Andy Green | e4c967c | 2007-07-10 19:32:07 +0200 | [diff] [blame] | 1459 | if (res_prepare == TXRX_QUEUED) { /* if it was an injected packet */ |
| 1460 | res = TXRX_CONTINUE; |
| 1461 | } else { |
| 1462 | for (handler = local->tx_handlers; *handler != NULL; |
| 1463 | handler++) { |
| 1464 | res = (*handler)(&tx); |
| 1465 | if (res != TXRX_CONTINUE) |
| 1466 | break; |
| 1467 | } |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1468 | } |
| 1469 | |
| 1470 | skb = tx.skb; /* handlers are allowed to change skb */ |
| 1471 | |
| 1472 | if (sta) |
| 1473 | sta_info_put(sta); |
| 1474 | |
| 1475 | if (unlikely(res == TXRX_DROP)) { |
| 1476 | I802_DEBUG_INC(local->tx_handlers_drop); |
| 1477 | goto drop; |
| 1478 | } |
| 1479 | |
| 1480 | if (unlikely(res == TXRX_QUEUED)) { |
| 1481 | I802_DEBUG_INC(local->tx_handlers_queued); |
| 1482 | return 0; |
| 1483 | } |
| 1484 | |
| 1485 | if (tx.u.tx.extra_frag) { |
| 1486 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) { |
| 1487 | int next_len, dur; |
| 1488 | struct ieee80211_hdr *hdr = |
| 1489 | (struct ieee80211_hdr *) |
| 1490 | tx.u.tx.extra_frag[i]->data; |
| 1491 | |
| 1492 | if (i + 1 < tx.u.tx.num_extra_frag) { |
| 1493 | next_len = tx.u.tx.extra_frag[i + 1]->len; |
| 1494 | } else { |
| 1495 | next_len = 0; |
| 1496 | tx.u.tx.rate = tx.u.tx.last_frag_rate; |
| 1497 | tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val; |
| 1498 | } |
| 1499 | dur = ieee80211_duration(&tx, 0, next_len); |
| 1500 | hdr->duration_id = cpu_to_le16(dur); |
| 1501 | } |
| 1502 | } |
| 1503 | |
| 1504 | retry: |
| 1505 | ret = __ieee80211_tx(local, skb, &tx); |
| 1506 | if (ret) { |
| 1507 | struct ieee80211_tx_stored_packet *store = |
| 1508 | &local->pending_packet[control->queue]; |
| 1509 | |
| 1510 | if (ret == IEEE80211_TX_FRAG_AGAIN) |
| 1511 | skb = NULL; |
| 1512 | set_bit(IEEE80211_LINK_STATE_PENDING, |
| 1513 | &local->state[control->queue]); |
| 1514 | smp_mb(); |
| 1515 | /* When the driver gets out of buffers during sending of |
| 1516 | * fragments and calls ieee80211_stop_queue, there is |
| 1517 | * a small window between IEEE80211_LINK_STATE_XOFF and |
| 1518 | * IEEE80211_LINK_STATE_PENDING flags are set. If a buffer |
| 1519 | * gets available in that window (i.e. driver calls |
| 1520 | * ieee80211_wake_queue), we would end up with ieee80211_tx |
| 1521 | * called with IEEE80211_LINK_STATE_PENDING. Prevent this by |
| 1522 | * continuing transmitting here when that situation is |
| 1523 | * possible to have happened. */ |
| 1524 | if (!__ieee80211_queue_stopped(local, control->queue)) { |
| 1525 | clear_bit(IEEE80211_LINK_STATE_PENDING, |
| 1526 | &local->state[control->queue]); |
| 1527 | goto retry; |
| 1528 | } |
| 1529 | memcpy(&store->control, control, |
| 1530 | sizeof(struct ieee80211_tx_control)); |
| 1531 | store->skb = skb; |
| 1532 | store->extra_frag = tx.u.tx.extra_frag; |
| 1533 | store->num_extra_frag = tx.u.tx.num_extra_frag; |
| 1534 | store->last_frag_hwrate = tx.u.tx.last_frag_hwrate; |
| 1535 | store->last_frag_rate = tx.u.tx.last_frag_rate; |
| 1536 | store->last_frag_rate_ctrl_probe = tx.u.tx.probe_last_frag; |
| 1537 | } |
| 1538 | return 0; |
| 1539 | |
| 1540 | drop: |
| 1541 | if (skb) |
| 1542 | dev_kfree_skb(skb); |
| 1543 | for (i = 0; i < tx.u.tx.num_extra_frag; i++) |
| 1544 | if (tx.u.tx.extra_frag[i]) |
| 1545 | dev_kfree_skb(tx.u.tx.extra_frag[i]); |
| 1546 | kfree(tx.u.tx.extra_frag); |
| 1547 | return 0; |
| 1548 | } |
| 1549 | |
| 1550 | static void ieee80211_tx_pending(unsigned long data) |
| 1551 | { |
| 1552 | struct ieee80211_local *local = (struct ieee80211_local *)data; |
| 1553 | struct net_device *dev = local->mdev; |
| 1554 | struct ieee80211_tx_stored_packet *store; |
| 1555 | struct ieee80211_txrx_data tx; |
| 1556 | int i, ret, reschedule = 0; |
| 1557 | |
| 1558 | netif_tx_lock_bh(dev); |
| 1559 | for (i = 0; i < local->hw.queues; i++) { |
| 1560 | if (__ieee80211_queue_stopped(local, i)) |
| 1561 | continue; |
| 1562 | if (!__ieee80211_queue_pending(local, i)) { |
| 1563 | reschedule = 1; |
| 1564 | continue; |
| 1565 | } |
| 1566 | store = &local->pending_packet[i]; |
| 1567 | tx.u.tx.control = &store->control; |
| 1568 | tx.u.tx.extra_frag = store->extra_frag; |
| 1569 | tx.u.tx.num_extra_frag = store->num_extra_frag; |
| 1570 | tx.u.tx.last_frag_hwrate = store->last_frag_hwrate; |
| 1571 | tx.u.tx.last_frag_rate = store->last_frag_rate; |
| 1572 | tx.u.tx.probe_last_frag = store->last_frag_rate_ctrl_probe; |
| 1573 | ret = __ieee80211_tx(local, store->skb, &tx); |
| 1574 | if (ret) { |
| 1575 | if (ret == IEEE80211_TX_FRAG_AGAIN) |
| 1576 | store->skb = NULL; |
| 1577 | } else { |
| 1578 | clear_bit(IEEE80211_LINK_STATE_PENDING, |
| 1579 | &local->state[i]); |
| 1580 | reschedule = 1; |
| 1581 | } |
| 1582 | } |
| 1583 | netif_tx_unlock_bh(dev); |
| 1584 | if (reschedule) { |
| 1585 | if (!ieee80211_qdisc_installed(dev)) { |
| 1586 | if (!__ieee80211_queue_stopped(local, 0)) |
| 1587 | netif_wake_queue(dev); |
| 1588 | } else |
| 1589 | netif_schedule(dev); |
| 1590 | } |
| 1591 | } |
| 1592 | |
| 1593 | static void ieee80211_clear_tx_pending(struct ieee80211_local *local) |
| 1594 | { |
| 1595 | int i, j; |
| 1596 | struct ieee80211_tx_stored_packet *store; |
| 1597 | |
| 1598 | for (i = 0; i < local->hw.queues; i++) { |
| 1599 | if (!__ieee80211_queue_pending(local, i)) |
| 1600 | continue; |
| 1601 | store = &local->pending_packet[i]; |
| 1602 | kfree_skb(store->skb); |
| 1603 | for (j = 0; j < store->num_extra_frag; j++) |
| 1604 | kfree_skb(store->extra_frag[j]); |
| 1605 | kfree(store->extra_frag); |
| 1606 | clear_bit(IEEE80211_LINK_STATE_PENDING, &local->state[i]); |
| 1607 | } |
| 1608 | } |
| 1609 | |
| 1610 | static int ieee80211_master_start_xmit(struct sk_buff *skb, |
| 1611 | struct net_device *dev) |
| 1612 | { |
| 1613 | struct ieee80211_tx_control control; |
| 1614 | struct ieee80211_tx_packet_data *pkt_data; |
| 1615 | struct net_device *odev = NULL; |
| 1616 | struct ieee80211_sub_if_data *osdata; |
| 1617 | int headroom; |
| 1618 | int ret; |
| 1619 | |
| 1620 | /* |
| 1621 | * copy control out of the skb so other people can use skb->cb |
| 1622 | */ |
| 1623 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; |
| 1624 | memset(&control, 0, sizeof(struct ieee80211_tx_control)); |
| 1625 | |
| 1626 | if (pkt_data->ifindex) |
| 1627 | odev = dev_get_by_index(pkt_data->ifindex); |
| 1628 | if (unlikely(odev && !is_ieee80211_device(odev, dev))) { |
| 1629 | dev_put(odev); |
| 1630 | odev = NULL; |
| 1631 | } |
| 1632 | if (unlikely(!odev)) { |
| 1633 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 1634 | printk(KERN_DEBUG "%s: Discarded packet with nonexistent " |
| 1635 | "originating device\n", dev->name); |
| 1636 | #endif |
| 1637 | dev_kfree_skb(skb); |
| 1638 | return 0; |
| 1639 | } |
| 1640 | osdata = IEEE80211_DEV_TO_SUB_IF(odev); |
| 1641 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 1642 | headroom = osdata->local->tx_headroom + IEEE80211_ENCRYPT_HEADROOM; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1643 | if (skb_headroom(skb) < headroom) { |
| 1644 | if (pskb_expand_head(skb, headroom, 0, GFP_ATOMIC)) { |
| 1645 | dev_kfree_skb(skb); |
Daniel Drake | 0e7088d | 2007-07-27 15:43:21 +0200 | [diff] [blame] | 1646 | dev_put(odev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1647 | return 0; |
| 1648 | } |
| 1649 | } |
| 1650 | |
| 1651 | control.ifindex = odev->ifindex; |
| 1652 | control.type = osdata->type; |
| 1653 | if (pkt_data->req_tx_status) |
| 1654 | control.flags |= IEEE80211_TXCTL_REQ_TX_STATUS; |
| 1655 | if (pkt_data->do_not_encrypt) |
| 1656 | control.flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT; |
| 1657 | if (pkt_data->requeue) |
| 1658 | control.flags |= IEEE80211_TXCTL_REQUEUE; |
| 1659 | control.queue = pkt_data->queue; |
| 1660 | |
| 1661 | ret = ieee80211_tx(odev, skb, &control, |
| 1662 | control.type == IEEE80211_IF_TYPE_MGMT); |
| 1663 | dev_put(odev); |
| 1664 | |
| 1665 | return ret; |
| 1666 | } |
| 1667 | |
| 1668 | |
Johannes Berg | 40f7cac | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 1669 | int ieee80211_monitor_start_xmit(struct sk_buff *skb, |
| 1670 | struct net_device *dev) |
| 1671 | { |
| 1672 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 1673 | struct ieee80211_tx_packet_data *pkt_data; |
| 1674 | struct ieee80211_radiotap_header *prthdr = |
| 1675 | (struct ieee80211_radiotap_header *)skb->data; |
| 1676 | u16 len; |
| 1677 | |
| 1678 | /* |
| 1679 | * there must be a radiotap header at the |
| 1680 | * start in this case |
| 1681 | */ |
| 1682 | if (unlikely(prthdr->it_version)) { |
| 1683 | /* only version 0 is supported */ |
| 1684 | dev_kfree_skb(skb); |
| 1685 | return NETDEV_TX_OK; |
| 1686 | } |
| 1687 | |
| 1688 | skb->dev = local->mdev; |
| 1689 | |
| 1690 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; |
| 1691 | memset(pkt_data, 0, sizeof(*pkt_data)); |
| 1692 | pkt_data->ifindex = dev->ifindex; |
| 1693 | pkt_data->mgmt_iface = 0; |
| 1694 | pkt_data->do_not_encrypt = 1; |
| 1695 | |
| 1696 | /* above needed because we set skb device to master */ |
| 1697 | |
| 1698 | /* |
| 1699 | * fix up the pointers accounting for the radiotap |
| 1700 | * header still being in there. We are being given |
| 1701 | * a precooked IEEE80211 header so no need for |
| 1702 | * normal processing |
| 1703 | */ |
| 1704 | len = le16_to_cpu(get_unaligned(&prthdr->it_len)); |
| 1705 | skb_set_mac_header(skb, len); |
| 1706 | skb_set_network_header(skb, len + sizeof(struct ieee80211_hdr)); |
| 1707 | skb_set_transport_header(skb, len + sizeof(struct ieee80211_hdr)); |
| 1708 | |
| 1709 | /* |
| 1710 | * pass the radiotap header up to |
| 1711 | * the next stage intact |
| 1712 | */ |
| 1713 | dev_queue_xmit(skb); |
| 1714 | |
| 1715 | return NETDEV_TX_OK; |
| 1716 | } |
| 1717 | |
| 1718 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1719 | /** |
| 1720 | * ieee80211_subif_start_xmit - netif start_xmit function for Ethernet-type |
| 1721 | * subinterfaces (wlan#, WDS, and VLAN interfaces) |
| 1722 | * @skb: packet to be sent |
| 1723 | * @dev: incoming interface |
| 1724 | * |
| 1725 | * Returns: 0 on success (and frees skb in this case) or 1 on failure (skb will |
| 1726 | * not be freed, and caller is responsible for either retrying later or freeing |
| 1727 | * skb). |
| 1728 | * |
| 1729 | * This function takes in an Ethernet header and encapsulates it with suitable |
| 1730 | * IEEE 802.11 header based on which interface the packet is coming in. The |
| 1731 | * encapsulated packet will then be passed to master interface, wlan#.11, for |
| 1732 | * transmission (through low-level driver). |
| 1733 | */ |
Johannes Berg | 40f7cac | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 1734 | int ieee80211_subif_start_xmit(struct sk_buff *skb, |
| 1735 | struct net_device *dev) |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1736 | { |
| 1737 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 1738 | struct ieee80211_tx_packet_data *pkt_data; |
| 1739 | struct ieee80211_sub_if_data *sdata; |
| 1740 | int ret = 1, head_need; |
| 1741 | u16 ethertype, hdrlen, fc; |
| 1742 | struct ieee80211_hdr hdr; |
| 1743 | const u8 *encaps_data; |
| 1744 | int encaps_len, skip_header_bytes; |
| 1745 | int nh_pos, h_pos, no_encrypt = 0; |
| 1746 | struct sta_info *sta; |
| 1747 | |
| 1748 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1749 | if (unlikely(skb->len < ETH_HLEN)) { |
| 1750 | printk(KERN_DEBUG "%s: short skb (len=%d)\n", |
| 1751 | dev->name, skb->len); |
| 1752 | ret = 0; |
| 1753 | goto fail; |
| 1754 | } |
| 1755 | |
| 1756 | nh_pos = skb_network_header(skb) - skb->data; |
| 1757 | h_pos = skb_transport_header(skb) - skb->data; |
| 1758 | |
| 1759 | /* convert Ethernet header to proper 802.11 header (based on |
| 1760 | * operation mode) */ |
| 1761 | ethertype = (skb->data[12] << 8) | skb->data[13]; |
| 1762 | /* TODO: handling for 802.1x authorized/unauthorized port */ |
| 1763 | fc = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_DATA; |
| 1764 | |
| 1765 | if (likely(sdata->type == IEEE80211_IF_TYPE_AP || |
| 1766 | sdata->type == IEEE80211_IF_TYPE_VLAN)) { |
| 1767 | fc |= IEEE80211_FCTL_FROMDS; |
| 1768 | /* DA BSSID SA */ |
| 1769 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 1770 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); |
| 1771 | memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN); |
| 1772 | hdrlen = 24; |
| 1773 | } else if (sdata->type == IEEE80211_IF_TYPE_WDS) { |
| 1774 | fc |= IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS; |
| 1775 | /* RA TA DA SA */ |
| 1776 | memcpy(hdr.addr1, sdata->u.wds.remote_addr, ETH_ALEN); |
| 1777 | memcpy(hdr.addr2, dev->dev_addr, ETH_ALEN); |
| 1778 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 1779 | memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN); |
| 1780 | hdrlen = 30; |
| 1781 | } else if (sdata->type == IEEE80211_IF_TYPE_STA) { |
| 1782 | fc |= IEEE80211_FCTL_TODS; |
| 1783 | /* BSSID SA DA */ |
| 1784 | memcpy(hdr.addr1, sdata->u.sta.bssid, ETH_ALEN); |
| 1785 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 1786 | memcpy(hdr.addr3, skb->data, ETH_ALEN); |
| 1787 | hdrlen = 24; |
| 1788 | } else if (sdata->type == IEEE80211_IF_TYPE_IBSS) { |
| 1789 | /* DA SA BSSID */ |
| 1790 | memcpy(hdr.addr1, skb->data, ETH_ALEN); |
| 1791 | memcpy(hdr.addr2, skb->data + ETH_ALEN, ETH_ALEN); |
| 1792 | memcpy(hdr.addr3, sdata->u.sta.bssid, ETH_ALEN); |
| 1793 | hdrlen = 24; |
| 1794 | } else { |
| 1795 | ret = 0; |
| 1796 | goto fail; |
| 1797 | } |
| 1798 | |
| 1799 | /* receiver is QoS enabled, use a QoS type frame */ |
| 1800 | sta = sta_info_get(local, hdr.addr1); |
| 1801 | if (sta) { |
| 1802 | if (sta->flags & WLAN_STA_WME) { |
| 1803 | fc |= IEEE80211_STYPE_QOS_DATA; |
| 1804 | hdrlen += 2; |
| 1805 | } |
| 1806 | sta_info_put(sta); |
| 1807 | } |
| 1808 | |
| 1809 | hdr.frame_control = cpu_to_le16(fc); |
| 1810 | hdr.duration_id = 0; |
| 1811 | hdr.seq_ctrl = 0; |
| 1812 | |
| 1813 | skip_header_bytes = ETH_HLEN; |
| 1814 | if (ethertype == ETH_P_AARP || ethertype == ETH_P_IPX) { |
| 1815 | encaps_data = bridge_tunnel_header; |
| 1816 | encaps_len = sizeof(bridge_tunnel_header); |
| 1817 | skip_header_bytes -= 2; |
| 1818 | } else if (ethertype >= 0x600) { |
| 1819 | encaps_data = rfc1042_header; |
| 1820 | encaps_len = sizeof(rfc1042_header); |
| 1821 | skip_header_bytes -= 2; |
| 1822 | } else { |
| 1823 | encaps_data = NULL; |
| 1824 | encaps_len = 0; |
| 1825 | } |
| 1826 | |
| 1827 | skb_pull(skb, skip_header_bytes); |
| 1828 | nh_pos -= skip_header_bytes; |
| 1829 | h_pos -= skip_header_bytes; |
| 1830 | |
| 1831 | /* TODO: implement support for fragments so that there is no need to |
| 1832 | * reallocate and copy payload; it might be enough to support one |
| 1833 | * extra fragment that would be copied in the beginning of the frame |
| 1834 | * data.. anyway, it would be nice to include this into skb structure |
| 1835 | * somehow |
| 1836 | * |
| 1837 | * There are few options for this: |
| 1838 | * use skb->cb as an extra space for 802.11 header |
| 1839 | * allocate new buffer if not enough headroom |
| 1840 | * make sure that there is enough headroom in every skb by increasing |
| 1841 | * build in headroom in __dev_alloc_skb() (linux/skbuff.h) and |
| 1842 | * alloc_skb() (net/core/skbuff.c) |
| 1843 | */ |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 1844 | head_need = hdrlen + encaps_len + local->tx_headroom; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1845 | head_need -= skb_headroom(skb); |
| 1846 | |
| 1847 | /* We are going to modify skb data, so make a copy of it if happens to |
| 1848 | * be cloned. This could happen, e.g., with Linux bridge code passing |
| 1849 | * us broadcast frames. */ |
| 1850 | |
| 1851 | if (head_need > 0 || skb_cloned(skb)) { |
| 1852 | #if 0 |
| 1853 | printk(KERN_DEBUG "%s: need to reallocate buffer for %d bytes " |
| 1854 | "of headroom\n", dev->name, head_need); |
| 1855 | #endif |
| 1856 | |
| 1857 | if (skb_cloned(skb)) |
| 1858 | I802_DEBUG_INC(local->tx_expand_skb_head_cloned); |
| 1859 | else |
| 1860 | I802_DEBUG_INC(local->tx_expand_skb_head); |
| 1861 | /* Since we have to reallocate the buffer, make sure that there |
| 1862 | * is enough room for possible WEP IV/ICV and TKIP (8 bytes |
| 1863 | * before payload and 12 after). */ |
| 1864 | if (pskb_expand_head(skb, (head_need > 0 ? head_need + 8 : 8), |
| 1865 | 12, GFP_ATOMIC)) { |
| 1866 | printk(KERN_DEBUG "%s: failed to reallocate TX buffer" |
| 1867 | "\n", dev->name); |
| 1868 | goto fail; |
| 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | if (encaps_data) { |
| 1873 | memcpy(skb_push(skb, encaps_len), encaps_data, encaps_len); |
| 1874 | nh_pos += encaps_len; |
| 1875 | h_pos += encaps_len; |
| 1876 | } |
| 1877 | memcpy(skb_push(skb, hdrlen), &hdr, hdrlen); |
| 1878 | nh_pos += hdrlen; |
| 1879 | h_pos += hdrlen; |
| 1880 | |
| 1881 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; |
| 1882 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); |
Johannes Berg | 40f7cac | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 1883 | pkt_data->ifindex = dev->ifindex; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1884 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); |
| 1885 | pkt_data->do_not_encrypt = no_encrypt; |
| 1886 | |
| 1887 | skb->dev = local->mdev; |
| 1888 | sdata->stats.tx_packets++; |
| 1889 | sdata->stats.tx_bytes += skb->len; |
| 1890 | |
| 1891 | /* Update skb pointers to various headers since this modified frame |
| 1892 | * is going to go through Linux networking code that may potentially |
| 1893 | * need things like pointer to IP header. */ |
| 1894 | skb_set_mac_header(skb, 0); |
| 1895 | skb_set_network_header(skb, nh_pos); |
| 1896 | skb_set_transport_header(skb, h_pos); |
| 1897 | |
| 1898 | dev->trans_start = jiffies; |
| 1899 | dev_queue_xmit(skb); |
| 1900 | |
| 1901 | return 0; |
| 1902 | |
| 1903 | fail: |
| 1904 | if (!ret) |
| 1905 | dev_kfree_skb(skb); |
| 1906 | |
| 1907 | return ret; |
| 1908 | } |
| 1909 | |
| 1910 | |
| 1911 | /* |
| 1912 | * This is the transmit routine for the 802.11 type interfaces |
| 1913 | * called by upper layers of the linux networking |
| 1914 | * stack when it has a frame to transmit |
| 1915 | */ |
| 1916 | static int |
| 1917 | ieee80211_mgmt_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 1918 | { |
| 1919 | struct ieee80211_sub_if_data *sdata; |
| 1920 | struct ieee80211_tx_packet_data *pkt_data; |
| 1921 | struct ieee80211_hdr *hdr; |
| 1922 | u16 fc; |
| 1923 | |
| 1924 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 1925 | |
| 1926 | if (skb->len < 10) { |
| 1927 | dev_kfree_skb(skb); |
| 1928 | return 0; |
| 1929 | } |
| 1930 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 1931 | if (skb_headroom(skb) < sdata->local->tx_headroom) { |
| 1932 | if (pskb_expand_head(skb, sdata->local->tx_headroom, |
| 1933 | 0, GFP_ATOMIC)) { |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 1934 | dev_kfree_skb(skb); |
| 1935 | return 0; |
| 1936 | } |
| 1937 | } |
| 1938 | |
| 1939 | hdr = (struct ieee80211_hdr *) skb->data; |
| 1940 | fc = le16_to_cpu(hdr->frame_control); |
| 1941 | |
| 1942 | pkt_data = (struct ieee80211_tx_packet_data *) skb->cb; |
| 1943 | memset(pkt_data, 0, sizeof(struct ieee80211_tx_packet_data)); |
| 1944 | pkt_data->ifindex = sdata->dev->ifindex; |
| 1945 | pkt_data->mgmt_iface = (sdata->type == IEEE80211_IF_TYPE_MGMT); |
| 1946 | |
| 1947 | skb->priority = 20; /* use hardcoded priority for mgmt TX queue */ |
| 1948 | skb->dev = sdata->local->mdev; |
| 1949 | |
| 1950 | /* |
| 1951 | * We're using the protocol field of the the frame control header |
| 1952 | * to request TX callback for hostapd. BIT(1) is checked. |
| 1953 | */ |
| 1954 | if ((fc & BIT(1)) == BIT(1)) { |
| 1955 | pkt_data->req_tx_status = 1; |
| 1956 | fc &= ~BIT(1); |
| 1957 | hdr->frame_control = cpu_to_le16(fc); |
| 1958 | } |
| 1959 | |
| 1960 | pkt_data->do_not_encrypt = !(fc & IEEE80211_FCTL_PROTECTED); |
| 1961 | |
| 1962 | sdata->stats.tx_packets++; |
| 1963 | sdata->stats.tx_bytes += skb->len; |
| 1964 | |
| 1965 | dev_queue_xmit(skb); |
| 1966 | |
| 1967 | return 0; |
| 1968 | } |
| 1969 | |
| 1970 | |
| 1971 | static void ieee80211_beacon_add_tim(struct ieee80211_local *local, |
| 1972 | struct ieee80211_if_ap *bss, |
| 1973 | struct sk_buff *skb) |
| 1974 | { |
| 1975 | u8 *pos, *tim; |
| 1976 | int aid0 = 0; |
| 1977 | int i, have_bits = 0, n1, n2; |
| 1978 | |
| 1979 | /* Generate bitmap for TIM only if there are any STAs in power save |
| 1980 | * mode. */ |
| 1981 | spin_lock_bh(&local->sta_lock); |
| 1982 | if (atomic_read(&bss->num_sta_ps) > 0) |
| 1983 | /* in the hope that this is faster than |
| 1984 | * checking byte-for-byte */ |
| 1985 | have_bits = !bitmap_empty((unsigned long*)bss->tim, |
| 1986 | IEEE80211_MAX_AID+1); |
| 1987 | |
| 1988 | if (bss->dtim_count == 0) |
| 1989 | bss->dtim_count = bss->dtim_period - 1; |
| 1990 | else |
| 1991 | bss->dtim_count--; |
| 1992 | |
| 1993 | tim = pos = (u8 *) skb_put(skb, 6); |
| 1994 | *pos++ = WLAN_EID_TIM; |
| 1995 | *pos++ = 4; |
| 1996 | *pos++ = bss->dtim_count; |
| 1997 | *pos++ = bss->dtim_period; |
| 1998 | |
| 1999 | if (bss->dtim_count == 0 && !skb_queue_empty(&bss->ps_bc_buf)) |
| 2000 | aid0 = 1; |
| 2001 | |
| 2002 | if (have_bits) { |
| 2003 | /* Find largest even number N1 so that bits numbered 1 through |
| 2004 | * (N1 x 8) - 1 in the bitmap are 0 and number N2 so that bits |
| 2005 | * (N2 + 1) x 8 through 2007 are 0. */ |
| 2006 | n1 = 0; |
| 2007 | for (i = 0; i < IEEE80211_MAX_TIM_LEN; i++) { |
| 2008 | if (bss->tim[i]) { |
| 2009 | n1 = i & 0xfe; |
| 2010 | break; |
| 2011 | } |
| 2012 | } |
| 2013 | n2 = n1; |
| 2014 | for (i = IEEE80211_MAX_TIM_LEN - 1; i >= n1; i--) { |
| 2015 | if (bss->tim[i]) { |
| 2016 | n2 = i; |
| 2017 | break; |
| 2018 | } |
| 2019 | } |
| 2020 | |
| 2021 | /* Bitmap control */ |
| 2022 | *pos++ = n1 | aid0; |
| 2023 | /* Part Virt Bitmap */ |
| 2024 | memcpy(pos, bss->tim + n1, n2 - n1 + 1); |
| 2025 | |
| 2026 | tim[1] = n2 - n1 + 4; |
| 2027 | skb_put(skb, n2 - n1); |
| 2028 | } else { |
| 2029 | *pos++ = aid0; /* Bitmap control */ |
| 2030 | *pos++ = 0; /* Part Virt Bitmap */ |
| 2031 | } |
| 2032 | spin_unlock_bh(&local->sta_lock); |
| 2033 | } |
| 2034 | |
| 2035 | |
| 2036 | struct sk_buff * ieee80211_beacon_get(struct ieee80211_hw *hw, int if_id, |
| 2037 | struct ieee80211_tx_control *control) |
| 2038 | { |
| 2039 | struct ieee80211_local *local = hw_to_local(hw); |
| 2040 | struct sk_buff *skb; |
| 2041 | struct net_device *bdev; |
| 2042 | struct ieee80211_sub_if_data *sdata = NULL; |
| 2043 | struct ieee80211_if_ap *ap = NULL; |
| 2044 | struct ieee80211_rate *rate; |
| 2045 | struct rate_control_extra extra; |
| 2046 | u8 *b_head, *b_tail; |
| 2047 | int bh_len, bt_len; |
| 2048 | |
| 2049 | bdev = dev_get_by_index(if_id); |
| 2050 | if (bdev) { |
| 2051 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); |
| 2052 | ap = &sdata->u.ap; |
| 2053 | dev_put(bdev); |
| 2054 | } |
| 2055 | |
| 2056 | if (!ap || sdata->type != IEEE80211_IF_TYPE_AP || |
| 2057 | !ap->beacon_head) { |
| 2058 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 2059 | if (net_ratelimit()) |
| 2060 | printk(KERN_DEBUG "no beacon data avail for idx=%d " |
| 2061 | "(%s)\n", if_id, bdev ? bdev->name : "N/A"); |
| 2062 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 2063 | return NULL; |
| 2064 | } |
| 2065 | |
| 2066 | /* Assume we are generating the normal beacon locally */ |
| 2067 | b_head = ap->beacon_head; |
| 2068 | b_tail = ap->beacon_tail; |
| 2069 | bh_len = ap->beacon_head_len; |
| 2070 | bt_len = ap->beacon_tail_len; |
| 2071 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 2072 | skb = dev_alloc_skb(local->tx_headroom + |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2073 | bh_len + bt_len + 256 /* maximum TIM len */); |
| 2074 | if (!skb) |
| 2075 | return NULL; |
| 2076 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 2077 | skb_reserve(skb, local->tx_headroom); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2078 | memcpy(skb_put(skb, bh_len), b_head, bh_len); |
| 2079 | |
| 2080 | ieee80211_include_sequence(sdata, (struct ieee80211_hdr *)skb->data); |
| 2081 | |
| 2082 | ieee80211_beacon_add_tim(local, ap, skb); |
| 2083 | |
| 2084 | if (b_tail) { |
| 2085 | memcpy(skb_put(skb, bt_len), b_tail, bt_len); |
| 2086 | } |
| 2087 | |
| 2088 | if (control) { |
| 2089 | memset(&extra, 0, sizeof(extra)); |
| 2090 | extra.mode = local->oper_hw_mode; |
| 2091 | |
| 2092 | rate = rate_control_get_rate(local, local->mdev, skb, &extra); |
| 2093 | if (!rate) { |
| 2094 | if (net_ratelimit()) { |
| 2095 | printk(KERN_DEBUG "%s: ieee80211_beacon_get: no rate " |
| 2096 | "found\n", local->mdev->name); |
| 2097 | } |
| 2098 | dev_kfree_skb(skb); |
| 2099 | return NULL; |
| 2100 | } |
| 2101 | |
| 2102 | control->tx_rate = (local->short_preamble && |
| 2103 | (rate->flags & IEEE80211_RATE_PREAMBLE2)) ? |
| 2104 | rate->val2 : rate->val; |
| 2105 | control->antenna_sel_tx = local->hw.conf.antenna_sel_tx; |
| 2106 | control->power_level = local->hw.conf.power_level; |
| 2107 | control->flags |= IEEE80211_TXCTL_NO_ACK; |
| 2108 | control->retry_limit = 1; |
| 2109 | control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK; |
| 2110 | } |
| 2111 | |
| 2112 | ap->num_beacons++; |
| 2113 | return skb; |
| 2114 | } |
| 2115 | EXPORT_SYMBOL(ieee80211_beacon_get); |
| 2116 | |
| 2117 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
| 2118 | size_t frame_len, |
| 2119 | const struct ieee80211_tx_control *frame_txctl) |
| 2120 | { |
| 2121 | struct ieee80211_local *local = hw_to_local(hw); |
| 2122 | struct ieee80211_rate *rate; |
| 2123 | int short_preamble = local->short_preamble; |
| 2124 | int erp; |
| 2125 | u16 dur; |
| 2126 | |
| 2127 | rate = frame_txctl->rts_rate; |
| 2128 | erp = !!(rate->flags & IEEE80211_RATE_ERP); |
| 2129 | |
| 2130 | /* CTS duration */ |
| 2131 | dur = ieee80211_frame_duration(local, 10, rate->rate, |
| 2132 | erp, short_preamble); |
| 2133 | /* Data frame duration */ |
| 2134 | dur += ieee80211_frame_duration(local, frame_len, rate->rate, |
| 2135 | erp, short_preamble); |
| 2136 | /* ACK duration */ |
| 2137 | dur += ieee80211_frame_duration(local, 10, rate->rate, |
| 2138 | erp, short_preamble); |
| 2139 | |
| 2140 | return cpu_to_le16(dur); |
| 2141 | } |
| 2142 | EXPORT_SYMBOL(ieee80211_rts_duration); |
| 2143 | |
| 2144 | |
| 2145 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
| 2146 | size_t frame_len, |
| 2147 | const struct ieee80211_tx_control *frame_txctl) |
| 2148 | { |
| 2149 | struct ieee80211_local *local = hw_to_local(hw); |
| 2150 | struct ieee80211_rate *rate; |
| 2151 | int short_preamble = local->short_preamble; |
| 2152 | int erp; |
| 2153 | u16 dur; |
| 2154 | |
| 2155 | rate = frame_txctl->rts_rate; |
| 2156 | erp = !!(rate->flags & IEEE80211_RATE_ERP); |
| 2157 | |
| 2158 | /* Data frame duration */ |
| 2159 | dur = ieee80211_frame_duration(local, frame_len, rate->rate, |
| 2160 | erp, short_preamble); |
| 2161 | if (!(frame_txctl->flags & IEEE80211_TXCTL_NO_ACK)) { |
| 2162 | /* ACK duration */ |
| 2163 | dur += ieee80211_frame_duration(local, 10, rate->rate, |
| 2164 | erp, short_preamble); |
| 2165 | } |
| 2166 | |
| 2167 | return cpu_to_le16(dur); |
| 2168 | } |
| 2169 | EXPORT_SYMBOL(ieee80211_ctstoself_duration); |
| 2170 | |
| 2171 | void ieee80211_rts_get(struct ieee80211_hw *hw, |
| 2172 | const void *frame, size_t frame_len, |
| 2173 | const struct ieee80211_tx_control *frame_txctl, |
| 2174 | struct ieee80211_rts *rts) |
| 2175 | { |
| 2176 | const struct ieee80211_hdr *hdr = frame; |
| 2177 | u16 fctl; |
| 2178 | |
| 2179 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS; |
| 2180 | rts->frame_control = cpu_to_le16(fctl); |
| 2181 | rts->duration = ieee80211_rts_duration(hw, frame_len, frame_txctl); |
| 2182 | memcpy(rts->ra, hdr->addr1, sizeof(rts->ra)); |
| 2183 | memcpy(rts->ta, hdr->addr2, sizeof(rts->ta)); |
| 2184 | } |
| 2185 | EXPORT_SYMBOL(ieee80211_rts_get); |
| 2186 | |
| 2187 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, |
| 2188 | const void *frame, size_t frame_len, |
| 2189 | const struct ieee80211_tx_control *frame_txctl, |
| 2190 | struct ieee80211_cts *cts) |
| 2191 | { |
| 2192 | const struct ieee80211_hdr *hdr = frame; |
| 2193 | u16 fctl; |
| 2194 | |
| 2195 | fctl = IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS; |
| 2196 | cts->frame_control = cpu_to_le16(fctl); |
| 2197 | cts->duration = ieee80211_ctstoself_duration(hw, frame_len, frame_txctl); |
| 2198 | memcpy(cts->ra, hdr->addr1, sizeof(cts->ra)); |
| 2199 | } |
| 2200 | EXPORT_SYMBOL(ieee80211_ctstoself_get); |
| 2201 | |
| 2202 | struct sk_buff * |
| 2203 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, int if_id, |
| 2204 | struct ieee80211_tx_control *control) |
| 2205 | { |
| 2206 | struct ieee80211_local *local = hw_to_local(hw); |
| 2207 | struct sk_buff *skb; |
| 2208 | struct sta_info *sta; |
| 2209 | ieee80211_tx_handler *handler; |
| 2210 | struct ieee80211_txrx_data tx; |
| 2211 | ieee80211_txrx_result res = TXRX_DROP; |
| 2212 | struct net_device *bdev; |
| 2213 | struct ieee80211_sub_if_data *sdata; |
| 2214 | struct ieee80211_if_ap *bss = NULL; |
| 2215 | |
| 2216 | bdev = dev_get_by_index(if_id); |
| 2217 | if (bdev) { |
| 2218 | sdata = IEEE80211_DEV_TO_SUB_IF(bdev); |
| 2219 | bss = &sdata->u.ap; |
| 2220 | dev_put(bdev); |
| 2221 | } |
| 2222 | if (!bss || sdata->type != IEEE80211_IF_TYPE_AP || !bss->beacon_head) |
| 2223 | return NULL; |
| 2224 | |
| 2225 | if (bss->dtim_count != 0) |
| 2226 | return NULL; /* send buffered bc/mc only after DTIM beacon */ |
| 2227 | memset(control, 0, sizeof(*control)); |
| 2228 | while (1) { |
| 2229 | skb = skb_dequeue(&bss->ps_bc_buf); |
| 2230 | if (!skb) |
| 2231 | return NULL; |
| 2232 | local->total_ps_buffered--; |
| 2233 | |
| 2234 | if (!skb_queue_empty(&bss->ps_bc_buf) && skb->len >= 2) { |
| 2235 | struct ieee80211_hdr *hdr = |
| 2236 | (struct ieee80211_hdr *) skb->data; |
| 2237 | /* more buffered multicast/broadcast frames ==> set |
| 2238 | * MoreData flag in IEEE 802.11 header to inform PS |
| 2239 | * STAs */ |
| 2240 | hdr->frame_control |= |
| 2241 | cpu_to_le16(IEEE80211_FCTL_MOREDATA); |
| 2242 | } |
| 2243 | |
| 2244 | if (ieee80211_tx_prepare(&tx, skb, local->mdev, control) == 0) |
| 2245 | break; |
| 2246 | dev_kfree_skb_any(skb); |
| 2247 | } |
| 2248 | sta = tx.sta; |
| 2249 | tx.u.tx.ps_buffered = 1; |
| 2250 | |
| 2251 | for (handler = local->tx_handlers; *handler != NULL; handler++) { |
| 2252 | res = (*handler)(&tx); |
| 2253 | if (res == TXRX_DROP || res == TXRX_QUEUED) |
| 2254 | break; |
| 2255 | } |
| 2256 | dev_put(tx.dev); |
| 2257 | skb = tx.skb; /* handlers are allowed to change skb */ |
| 2258 | |
| 2259 | if (res == TXRX_DROP) { |
| 2260 | I802_DEBUG_INC(local->tx_handlers_drop); |
| 2261 | dev_kfree_skb(skb); |
| 2262 | skb = NULL; |
| 2263 | } else if (res == TXRX_QUEUED) { |
| 2264 | I802_DEBUG_INC(local->tx_handlers_queued); |
| 2265 | skb = NULL; |
| 2266 | } |
| 2267 | |
| 2268 | if (sta) |
| 2269 | sta_info_put(sta); |
| 2270 | |
| 2271 | return skb; |
| 2272 | } |
| 2273 | EXPORT_SYMBOL(ieee80211_get_buffered_bc); |
| 2274 | |
| 2275 | static int __ieee80211_if_config(struct net_device *dev, |
| 2276 | struct sk_buff *beacon, |
| 2277 | struct ieee80211_tx_control *control) |
| 2278 | { |
| 2279 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2280 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2281 | struct ieee80211_if_conf conf; |
| 2282 | static u8 scan_bssid[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| 2283 | |
| 2284 | if (!local->ops->config_interface || !netif_running(dev)) |
| 2285 | return 0; |
| 2286 | |
| 2287 | memset(&conf, 0, sizeof(conf)); |
| 2288 | conf.type = sdata->type; |
| 2289 | if (sdata->type == IEEE80211_IF_TYPE_STA || |
| 2290 | sdata->type == IEEE80211_IF_TYPE_IBSS) { |
| 2291 | if (local->sta_scanning && |
| 2292 | local->scan_dev == dev) |
| 2293 | conf.bssid = scan_bssid; |
| 2294 | else |
| 2295 | conf.bssid = sdata->u.sta.bssid; |
| 2296 | conf.ssid = sdata->u.sta.ssid; |
| 2297 | conf.ssid_len = sdata->u.sta.ssid_len; |
| 2298 | conf.generic_elem = sdata->u.sta.extra_ie; |
| 2299 | conf.generic_elem_len = sdata->u.sta.extra_ie_len; |
| 2300 | } else if (sdata->type == IEEE80211_IF_TYPE_AP) { |
| 2301 | conf.ssid = sdata->u.ap.ssid; |
| 2302 | conf.ssid_len = sdata->u.ap.ssid_len; |
| 2303 | conf.generic_elem = sdata->u.ap.generic_elem; |
| 2304 | conf.generic_elem_len = sdata->u.ap.generic_elem_len; |
| 2305 | conf.beacon = beacon; |
| 2306 | conf.beacon_control = control; |
| 2307 | } |
| 2308 | return local->ops->config_interface(local_to_hw(local), |
| 2309 | dev->ifindex, &conf); |
| 2310 | } |
| 2311 | |
| 2312 | int ieee80211_if_config(struct net_device *dev) |
| 2313 | { |
| 2314 | return __ieee80211_if_config(dev, NULL, NULL); |
| 2315 | } |
| 2316 | |
| 2317 | int ieee80211_if_config_beacon(struct net_device *dev) |
| 2318 | { |
| 2319 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2320 | struct ieee80211_tx_control control; |
| 2321 | struct sk_buff *skb; |
| 2322 | |
| 2323 | if (!(local->hw.flags & IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE)) |
| 2324 | return 0; |
| 2325 | skb = ieee80211_beacon_get(local_to_hw(local), dev->ifindex, &control); |
| 2326 | if (!skb) |
| 2327 | return -ENOMEM; |
| 2328 | return __ieee80211_if_config(dev, skb, &control); |
| 2329 | } |
| 2330 | |
| 2331 | int ieee80211_hw_config(struct ieee80211_local *local) |
| 2332 | { |
| 2333 | struct ieee80211_hw_mode *mode; |
| 2334 | struct ieee80211_channel *chan; |
| 2335 | int ret = 0; |
| 2336 | |
| 2337 | if (local->sta_scanning) { |
| 2338 | chan = local->scan_channel; |
| 2339 | mode = local->scan_hw_mode; |
| 2340 | } else { |
| 2341 | chan = local->oper_channel; |
| 2342 | mode = local->oper_hw_mode; |
| 2343 | } |
| 2344 | |
| 2345 | local->hw.conf.channel = chan->chan; |
| 2346 | local->hw.conf.channel_val = chan->val; |
| 2347 | local->hw.conf.power_level = chan->power_level; |
| 2348 | local->hw.conf.freq = chan->freq; |
| 2349 | local->hw.conf.phymode = mode->mode; |
| 2350 | local->hw.conf.antenna_max = chan->antenna_max; |
| 2351 | local->hw.conf.chan = chan; |
| 2352 | local->hw.conf.mode = mode; |
| 2353 | |
| 2354 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 2355 | printk(KERN_DEBUG "HW CONFIG: channel=%d freq=%d " |
| 2356 | "phymode=%d\n", local->hw.conf.channel, local->hw.conf.freq, |
| 2357 | local->hw.conf.phymode); |
| 2358 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 2359 | |
| 2360 | if (local->ops->config) |
| 2361 | ret = local->ops->config(local_to_hw(local), &local->hw.conf); |
| 2362 | |
| 2363 | return ret; |
| 2364 | } |
| 2365 | |
| 2366 | |
| 2367 | static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) |
| 2368 | { |
| 2369 | /* FIX: what would be proper limits for MTU? |
| 2370 | * This interface uses 802.3 frames. */ |
| 2371 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6) { |
| 2372 | printk(KERN_WARNING "%s: invalid MTU %d\n", |
| 2373 | dev->name, new_mtu); |
| 2374 | return -EINVAL; |
| 2375 | } |
| 2376 | |
| 2377 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 2378 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); |
| 2379 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 2380 | dev->mtu = new_mtu; |
| 2381 | return 0; |
| 2382 | } |
| 2383 | |
| 2384 | |
| 2385 | static int ieee80211_change_mtu_apdev(struct net_device *dev, int new_mtu) |
| 2386 | { |
| 2387 | /* FIX: what would be proper limits for MTU? |
| 2388 | * This interface uses 802.11 frames. */ |
| 2389 | if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) { |
| 2390 | printk(KERN_WARNING "%s: invalid MTU %d\n", |
| 2391 | dev->name, new_mtu); |
| 2392 | return -EINVAL; |
| 2393 | } |
| 2394 | |
| 2395 | #ifdef CONFIG_MAC80211_VERBOSE_DEBUG |
| 2396 | printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu); |
| 2397 | #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */ |
| 2398 | dev->mtu = new_mtu; |
| 2399 | return 0; |
| 2400 | } |
| 2401 | |
| 2402 | enum netif_tx_lock_class { |
| 2403 | TX_LOCK_NORMAL, |
| 2404 | TX_LOCK_MASTER, |
| 2405 | }; |
| 2406 | |
| 2407 | static inline void netif_tx_lock_nested(struct net_device *dev, int subclass) |
| 2408 | { |
| 2409 | spin_lock_nested(&dev->_xmit_lock, subclass); |
| 2410 | dev->xmit_lock_owner = smp_processor_id(); |
| 2411 | } |
| 2412 | |
| 2413 | static void ieee80211_set_multicast_list(struct net_device *dev) |
| 2414 | { |
| 2415 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2416 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2417 | unsigned short flags; |
| 2418 | |
| 2419 | netif_tx_lock_nested(local->mdev, TX_LOCK_MASTER); |
| 2420 | if (((dev->flags & IFF_ALLMULTI) != 0) ^ (sdata->allmulti != 0)) { |
| 2421 | if (sdata->allmulti) { |
| 2422 | sdata->allmulti = 0; |
| 2423 | local->iff_allmultis--; |
| 2424 | } else { |
| 2425 | sdata->allmulti = 1; |
| 2426 | local->iff_allmultis++; |
| 2427 | } |
| 2428 | } |
| 2429 | if (((dev->flags & IFF_PROMISC) != 0) ^ (sdata->promisc != 0)) { |
| 2430 | if (sdata->promisc) { |
| 2431 | sdata->promisc = 0; |
| 2432 | local->iff_promiscs--; |
| 2433 | } else { |
| 2434 | sdata->promisc = 1; |
| 2435 | local->iff_promiscs++; |
| 2436 | } |
| 2437 | } |
| 2438 | if (dev->mc_count != sdata->mc_count) { |
| 2439 | local->mc_count = local->mc_count - sdata->mc_count + |
| 2440 | dev->mc_count; |
| 2441 | sdata->mc_count = dev->mc_count; |
| 2442 | } |
| 2443 | if (local->ops->set_multicast_list) { |
| 2444 | flags = local->mdev->flags; |
| 2445 | if (local->iff_allmultis) |
| 2446 | flags |= IFF_ALLMULTI; |
| 2447 | if (local->iff_promiscs) |
| 2448 | flags |= IFF_PROMISC; |
| 2449 | read_lock(&local->sub_if_lock); |
| 2450 | local->ops->set_multicast_list(local_to_hw(local), flags, |
| 2451 | local->mc_count); |
| 2452 | read_unlock(&local->sub_if_lock); |
| 2453 | } |
| 2454 | netif_tx_unlock(local->mdev); |
| 2455 | } |
| 2456 | |
| 2457 | struct dev_mc_list *ieee80211_get_mc_list_item(struct ieee80211_hw *hw, |
| 2458 | struct dev_mc_list *prev, |
| 2459 | void **ptr) |
| 2460 | { |
| 2461 | struct ieee80211_local *local = hw_to_local(hw); |
| 2462 | struct ieee80211_sub_if_data *sdata = *ptr; |
| 2463 | struct dev_mc_list *mc; |
| 2464 | |
| 2465 | if (!prev) { |
| 2466 | WARN_ON(sdata); |
| 2467 | sdata = NULL; |
| 2468 | } |
| 2469 | if (!prev || !prev->next) { |
| 2470 | if (sdata) |
| 2471 | sdata = list_entry(sdata->list.next, |
| 2472 | struct ieee80211_sub_if_data, list); |
| 2473 | else |
| 2474 | sdata = list_entry(local->sub_if_list.next, |
| 2475 | struct ieee80211_sub_if_data, list); |
| 2476 | if (&sdata->list != &local->sub_if_list) |
| 2477 | mc = sdata->dev->mc_list; |
| 2478 | else |
| 2479 | mc = NULL; |
| 2480 | } else |
| 2481 | mc = prev->next; |
| 2482 | |
| 2483 | *ptr = sdata; |
| 2484 | return mc; |
| 2485 | } |
| 2486 | EXPORT_SYMBOL(ieee80211_get_mc_list_item); |
| 2487 | |
| 2488 | static struct net_device_stats *ieee80211_get_stats(struct net_device *dev) |
| 2489 | { |
| 2490 | struct ieee80211_sub_if_data *sdata; |
| 2491 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2492 | return &(sdata->stats); |
| 2493 | } |
| 2494 | |
| 2495 | static void ieee80211_if_shutdown(struct net_device *dev) |
| 2496 | { |
| 2497 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2498 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2499 | |
| 2500 | ASSERT_RTNL(); |
| 2501 | switch (sdata->type) { |
| 2502 | case IEEE80211_IF_TYPE_STA: |
| 2503 | case IEEE80211_IF_TYPE_IBSS: |
| 2504 | sdata->u.sta.state = IEEE80211_DISABLED; |
| 2505 | del_timer_sync(&sdata->u.sta.timer); |
| 2506 | skb_queue_purge(&sdata->u.sta.skb_queue); |
| 2507 | if (!local->ops->hw_scan && |
| 2508 | local->scan_dev == sdata->dev) { |
| 2509 | local->sta_scanning = 0; |
| 2510 | cancel_delayed_work(&local->scan_work); |
| 2511 | } |
| 2512 | flush_workqueue(local->hw.workqueue); |
| 2513 | break; |
| 2514 | } |
| 2515 | } |
| 2516 | |
| 2517 | static inline int identical_mac_addr_allowed(int type1, int type2) |
| 2518 | { |
| 2519 | return (type1 == IEEE80211_IF_TYPE_MNTR || |
| 2520 | type2 == IEEE80211_IF_TYPE_MNTR || |
| 2521 | (type1 == IEEE80211_IF_TYPE_AP && |
| 2522 | type2 == IEEE80211_IF_TYPE_WDS) || |
| 2523 | (type1 == IEEE80211_IF_TYPE_WDS && |
| 2524 | (type2 == IEEE80211_IF_TYPE_WDS || |
| 2525 | type2 == IEEE80211_IF_TYPE_AP)) || |
| 2526 | (type1 == IEEE80211_IF_TYPE_AP && |
| 2527 | type2 == IEEE80211_IF_TYPE_VLAN) || |
| 2528 | (type1 == IEEE80211_IF_TYPE_VLAN && |
| 2529 | (type2 == IEEE80211_IF_TYPE_AP || |
| 2530 | type2 == IEEE80211_IF_TYPE_VLAN))); |
| 2531 | } |
| 2532 | |
| 2533 | static int ieee80211_master_open(struct net_device *dev) |
| 2534 | { |
| 2535 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2536 | struct ieee80211_sub_if_data *sdata; |
| 2537 | int res = -EOPNOTSUPP; |
| 2538 | |
| 2539 | read_lock(&local->sub_if_lock); |
| 2540 | list_for_each_entry(sdata, &local->sub_if_list, list) { |
| 2541 | if (sdata->dev != dev && netif_running(sdata->dev)) { |
| 2542 | res = 0; |
| 2543 | break; |
| 2544 | } |
| 2545 | } |
| 2546 | read_unlock(&local->sub_if_lock); |
| 2547 | return res; |
| 2548 | } |
| 2549 | |
| 2550 | static int ieee80211_master_stop(struct net_device *dev) |
| 2551 | { |
| 2552 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2553 | struct ieee80211_sub_if_data *sdata; |
| 2554 | |
| 2555 | read_lock(&local->sub_if_lock); |
| 2556 | list_for_each_entry(sdata, &local->sub_if_list, list) |
| 2557 | if (sdata->dev != dev && netif_running(sdata->dev)) |
| 2558 | dev_close(sdata->dev); |
| 2559 | read_unlock(&local->sub_if_lock); |
| 2560 | |
| 2561 | return 0; |
| 2562 | } |
| 2563 | |
| 2564 | static int ieee80211_mgmt_open(struct net_device *dev) |
| 2565 | { |
| 2566 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2567 | |
| 2568 | if (!netif_running(local->mdev)) |
| 2569 | return -EOPNOTSUPP; |
| 2570 | return 0; |
| 2571 | } |
| 2572 | |
| 2573 | static int ieee80211_mgmt_stop(struct net_device *dev) |
| 2574 | { |
| 2575 | return 0; |
| 2576 | } |
| 2577 | |
| 2578 | /* Check if running monitor interfaces should go to a "soft monitor" mode |
| 2579 | * and switch them if necessary. */ |
| 2580 | static inline void ieee80211_start_soft_monitor(struct ieee80211_local *local) |
| 2581 | { |
| 2582 | struct ieee80211_if_init_conf conf; |
| 2583 | |
| 2584 | if (local->open_count && local->open_count == local->monitors && |
| 2585 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) && |
| 2586 | local->ops->remove_interface) { |
| 2587 | conf.if_id = -1; |
| 2588 | conf.type = IEEE80211_IF_TYPE_MNTR; |
| 2589 | conf.mac_addr = NULL; |
| 2590 | local->ops->remove_interface(local_to_hw(local), &conf); |
| 2591 | } |
| 2592 | } |
| 2593 | |
| 2594 | /* Check if running monitor interfaces should go to a "hard monitor" mode |
| 2595 | * and switch them if necessary. */ |
| 2596 | static void ieee80211_start_hard_monitor(struct ieee80211_local *local) |
| 2597 | { |
| 2598 | struct ieee80211_if_init_conf conf; |
| 2599 | |
| 2600 | if (local->open_count && local->open_count == local->monitors && |
Johannes Berg | 4480f15c | 2007-07-10 19:32:10 +0200 | [diff] [blame] | 2601 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2602 | conf.if_id = -1; |
| 2603 | conf.type = IEEE80211_IF_TYPE_MNTR; |
| 2604 | conf.mac_addr = NULL; |
| 2605 | local->ops->add_interface(local_to_hw(local), &conf); |
| 2606 | } |
| 2607 | } |
| 2608 | |
| 2609 | static int ieee80211_open(struct net_device *dev) |
| 2610 | { |
| 2611 | struct ieee80211_sub_if_data *sdata, *nsdata; |
| 2612 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2613 | struct ieee80211_if_init_conf conf; |
| 2614 | int res; |
| 2615 | |
| 2616 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2617 | read_lock(&local->sub_if_lock); |
| 2618 | list_for_each_entry(nsdata, &local->sub_if_list, list) { |
| 2619 | struct net_device *ndev = nsdata->dev; |
| 2620 | |
| 2621 | if (ndev != dev && ndev != local->mdev && netif_running(ndev) && |
| 2622 | compare_ether_addr(dev->dev_addr, ndev->dev_addr) == 0 && |
| 2623 | !identical_mac_addr_allowed(sdata->type, nsdata->type)) { |
| 2624 | read_unlock(&local->sub_if_lock); |
| 2625 | return -ENOTUNIQ; |
| 2626 | } |
| 2627 | } |
| 2628 | read_unlock(&local->sub_if_lock); |
| 2629 | |
| 2630 | if (sdata->type == IEEE80211_IF_TYPE_WDS && |
| 2631 | is_zero_ether_addr(sdata->u.wds.remote_addr)) |
| 2632 | return -ENOLINK; |
| 2633 | |
| 2634 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && local->open_count && |
| 2635 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { |
| 2636 | /* run the interface in a "soft monitor" mode */ |
| 2637 | local->monitors++; |
| 2638 | local->open_count++; |
| 2639 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
| 2640 | return 0; |
| 2641 | } |
| 2642 | ieee80211_start_soft_monitor(local); |
| 2643 | |
Johannes Berg | 4480f15c | 2007-07-10 19:32:10 +0200 | [diff] [blame] | 2644 | conf.if_id = dev->ifindex; |
| 2645 | conf.type = sdata->type; |
| 2646 | conf.mac_addr = dev->dev_addr; |
| 2647 | res = local->ops->add_interface(local_to_hw(local), &conf); |
| 2648 | if (res) { |
| 2649 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) |
| 2650 | ieee80211_start_hard_monitor(local); |
| 2651 | return res; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2652 | } |
| 2653 | |
| 2654 | if (local->open_count == 0) { |
| 2655 | res = 0; |
| 2656 | tasklet_enable(&local->tx_pending_tasklet); |
| 2657 | tasklet_enable(&local->tasklet); |
| 2658 | if (local->ops->open) |
| 2659 | res = local->ops->open(local_to_hw(local)); |
| 2660 | if (res == 0) { |
| 2661 | res = dev_open(local->mdev); |
| 2662 | if (res) { |
| 2663 | if (local->ops->stop) |
| 2664 | local->ops->stop(local_to_hw(local)); |
| 2665 | } else { |
| 2666 | res = ieee80211_hw_config(local); |
| 2667 | if (res && local->ops->stop) |
| 2668 | local->ops->stop(local_to_hw(local)); |
| 2669 | else if (!res && local->apdev) |
| 2670 | dev_open(local->apdev); |
| 2671 | } |
| 2672 | } |
| 2673 | if (res) { |
| 2674 | if (local->ops->remove_interface) |
| 2675 | local->ops->remove_interface(local_to_hw(local), |
| 2676 | &conf); |
| 2677 | return res; |
| 2678 | } |
| 2679 | } |
| 2680 | local->open_count++; |
| 2681 | |
| 2682 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { |
| 2683 | local->monitors++; |
| 2684 | local->hw.conf.flags |= IEEE80211_CONF_RADIOTAP; |
| 2685 | } else |
| 2686 | ieee80211_if_config(dev); |
| 2687 | |
| 2688 | if (sdata->type == IEEE80211_IF_TYPE_STA && |
| 2689 | !local->user_space_mlme) |
| 2690 | netif_carrier_off(dev); |
Michael Wu | 52fb24c | 2007-05-20 09:44:00 -0700 | [diff] [blame] | 2691 | else |
| 2692 | netif_carrier_on(dev); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2693 | |
| 2694 | netif_start_queue(dev); |
| 2695 | return 0; |
| 2696 | } |
| 2697 | |
| 2698 | |
| 2699 | static int ieee80211_stop(struct net_device *dev) |
| 2700 | { |
| 2701 | struct ieee80211_sub_if_data *sdata; |
| 2702 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 2703 | |
| 2704 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 2705 | |
| 2706 | if (sdata->type == IEEE80211_IF_TYPE_MNTR && |
| 2707 | local->open_count > 1 && |
| 2708 | !(local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER)) { |
| 2709 | /* remove "soft monitor" interface */ |
| 2710 | local->open_count--; |
| 2711 | local->monitors--; |
| 2712 | if (!local->monitors) |
| 2713 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
| 2714 | return 0; |
| 2715 | } |
| 2716 | |
| 2717 | netif_stop_queue(dev); |
| 2718 | ieee80211_if_shutdown(dev); |
| 2719 | |
| 2720 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { |
| 2721 | local->monitors--; |
| 2722 | if (!local->monitors) |
| 2723 | local->hw.conf.flags &= ~IEEE80211_CONF_RADIOTAP; |
| 2724 | } |
| 2725 | |
| 2726 | local->open_count--; |
| 2727 | if (local->open_count == 0) { |
| 2728 | if (netif_running(local->mdev)) |
| 2729 | dev_close(local->mdev); |
| 2730 | if (local->apdev) |
| 2731 | dev_close(local->apdev); |
| 2732 | if (local->ops->stop) |
| 2733 | local->ops->stop(local_to_hw(local)); |
| 2734 | tasklet_disable(&local->tx_pending_tasklet); |
| 2735 | tasklet_disable(&local->tasklet); |
| 2736 | } |
| 2737 | if (local->ops->remove_interface) { |
| 2738 | struct ieee80211_if_init_conf conf; |
| 2739 | |
| 2740 | conf.if_id = dev->ifindex; |
| 2741 | conf.type = sdata->type; |
| 2742 | conf.mac_addr = dev->dev_addr; |
| 2743 | local->ops->remove_interface(local_to_hw(local), &conf); |
| 2744 | } |
| 2745 | |
| 2746 | ieee80211_start_hard_monitor(local); |
| 2747 | |
| 2748 | return 0; |
| 2749 | } |
| 2750 | |
| 2751 | |
| 2752 | static int header_parse_80211(struct sk_buff *skb, unsigned char *haddr) |
| 2753 | { |
| 2754 | memcpy(haddr, skb_mac_header(skb) + 10, ETH_ALEN); /* addr2 */ |
| 2755 | return ETH_ALEN; |
| 2756 | } |
| 2757 | |
Johannes Berg | 571ecf6 | 2007-07-27 15:43:22 +0200 | [diff] [blame^] | 2758 | struct ieee80211_rate * |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2759 | ieee80211_get_rate(struct ieee80211_local *local, int phymode, int hw_rate) |
| 2760 | { |
| 2761 | struct ieee80211_hw_mode *mode; |
| 2762 | int r; |
| 2763 | |
| 2764 | list_for_each_entry(mode, &local->modes_list, list) { |
| 2765 | if (mode->mode != phymode) |
| 2766 | continue; |
| 2767 | for (r = 0; r < mode->num_rates; r++) { |
| 2768 | struct ieee80211_rate *rate = &mode->rates[r]; |
| 2769 | if (rate->val == hw_rate || |
| 2770 | (rate->flags & IEEE80211_RATE_PREAMBLE2 && |
| 2771 | rate->val2 == hw_rate)) |
| 2772 | return rate; |
| 2773 | } |
| 2774 | } |
| 2775 | |
| 2776 | return NULL; |
| 2777 | } |
| 2778 | |
| 2779 | static void |
| 2780 | ieee80211_fill_frame_info(struct ieee80211_local *local, |
| 2781 | struct ieee80211_frame_info *fi, |
| 2782 | struct ieee80211_rx_status *status) |
| 2783 | { |
| 2784 | if (status) { |
| 2785 | struct timespec ts; |
| 2786 | struct ieee80211_rate *rate; |
| 2787 | |
| 2788 | jiffies_to_timespec(jiffies, &ts); |
| 2789 | fi->hosttime = cpu_to_be64((u64) ts.tv_sec * 1000000 + |
| 2790 | ts.tv_nsec / 1000); |
| 2791 | fi->mactime = cpu_to_be64(status->mactime); |
| 2792 | switch (status->phymode) { |
| 2793 | case MODE_IEEE80211A: |
| 2794 | fi->phytype = htonl(ieee80211_phytype_ofdm_dot11_a); |
| 2795 | break; |
| 2796 | case MODE_IEEE80211B: |
| 2797 | fi->phytype = htonl(ieee80211_phytype_dsss_dot11_b); |
| 2798 | break; |
| 2799 | case MODE_IEEE80211G: |
| 2800 | fi->phytype = htonl(ieee80211_phytype_pbcc_dot11_g); |
| 2801 | break; |
| 2802 | case MODE_ATHEROS_TURBO: |
| 2803 | fi->phytype = |
| 2804 | htonl(ieee80211_phytype_dsss_dot11_turbo); |
| 2805 | break; |
| 2806 | default: |
| 2807 | fi->phytype = htonl(0xAAAAAAAA); |
| 2808 | break; |
| 2809 | } |
| 2810 | fi->channel = htonl(status->channel); |
| 2811 | rate = ieee80211_get_rate(local, status->phymode, |
| 2812 | status->rate); |
| 2813 | if (rate) { |
| 2814 | fi->datarate = htonl(rate->rate); |
| 2815 | if (rate->flags & IEEE80211_RATE_PREAMBLE2) { |
| 2816 | if (status->rate == rate->val) |
| 2817 | fi->preamble = htonl(2); /* long */ |
| 2818 | else if (status->rate == rate->val2) |
| 2819 | fi->preamble = htonl(1); /* short */ |
| 2820 | } else |
| 2821 | fi->preamble = htonl(0); |
| 2822 | } else { |
| 2823 | fi->datarate = htonl(0); |
| 2824 | fi->preamble = htonl(0); |
| 2825 | } |
| 2826 | |
| 2827 | fi->antenna = htonl(status->antenna); |
| 2828 | fi->priority = htonl(0xffffffff); /* no clue */ |
| 2829 | fi->ssi_type = htonl(ieee80211_ssi_raw); |
| 2830 | fi->ssi_signal = htonl(status->ssi); |
| 2831 | fi->ssi_noise = 0x00000000; |
| 2832 | fi->encoding = 0; |
| 2833 | } else { |
| 2834 | /* clear everything because we really don't know. |
| 2835 | * the msg_type field isn't present on monitor frames |
| 2836 | * so we don't know whether it will be present or not, |
| 2837 | * but it's ok to not clear it since it'll be assigned |
| 2838 | * anyway */ |
| 2839 | memset(fi, 0, sizeof(*fi) - sizeof(fi->msg_type)); |
| 2840 | |
| 2841 | fi->ssi_type = htonl(ieee80211_ssi_none); |
| 2842 | } |
| 2843 | fi->version = htonl(IEEE80211_FI_VERSION); |
| 2844 | fi->length = cpu_to_be32(sizeof(*fi) - sizeof(fi->msg_type)); |
| 2845 | } |
| 2846 | |
| 2847 | /* this routine is actually not just for this, but also |
| 2848 | * for pushing fake 'management' frames into userspace. |
| 2849 | * it shall be replaced by a netlink-based system. */ |
| 2850 | void |
| 2851 | ieee80211_rx_mgmt(struct ieee80211_local *local, struct sk_buff *skb, |
| 2852 | struct ieee80211_rx_status *status, u32 msg_type) |
| 2853 | { |
| 2854 | struct ieee80211_frame_info *fi; |
| 2855 | const size_t hlen = sizeof(struct ieee80211_frame_info); |
| 2856 | struct ieee80211_sub_if_data *sdata; |
| 2857 | |
| 2858 | skb->dev = local->apdev; |
| 2859 | |
| 2860 | sdata = IEEE80211_DEV_TO_SUB_IF(local->apdev); |
| 2861 | |
| 2862 | if (skb_headroom(skb) < hlen) { |
| 2863 | I802_DEBUG_INC(local->rx_expand_skb_head); |
| 2864 | if (pskb_expand_head(skb, hlen, 0, GFP_ATOMIC)) { |
| 2865 | dev_kfree_skb(skb); |
| 2866 | return; |
| 2867 | } |
| 2868 | } |
| 2869 | |
| 2870 | fi = (struct ieee80211_frame_info *) skb_push(skb, hlen); |
| 2871 | |
| 2872 | ieee80211_fill_frame_info(local, fi, status); |
| 2873 | fi->msg_type = htonl(msg_type); |
| 2874 | |
| 2875 | sdata->stats.rx_packets++; |
| 2876 | sdata->stats.rx_bytes += skb->len; |
| 2877 | |
| 2878 | skb_set_mac_header(skb, 0); |
| 2879 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 2880 | skb->pkt_type = PACKET_OTHERHOST; |
| 2881 | skb->protocol = htons(ETH_P_802_2); |
| 2882 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 2883 | netif_rx(skb); |
| 2884 | } |
| 2885 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2886 | int ieee80211_radar_status(struct ieee80211_hw *hw, int channel, |
| 2887 | int radar, int radar_type) |
| 2888 | { |
| 2889 | struct sk_buff *skb; |
| 2890 | struct ieee80211_radar_info *msg; |
| 2891 | struct ieee80211_local *local = hw_to_local(hw); |
| 2892 | |
| 2893 | if (!local->apdev) |
| 2894 | return 0; |
| 2895 | |
| 2896 | skb = dev_alloc_skb(sizeof(struct ieee80211_frame_info) + |
| 2897 | sizeof(struct ieee80211_radar_info)); |
| 2898 | |
| 2899 | if (!skb) |
| 2900 | return -ENOMEM; |
| 2901 | skb_reserve(skb, sizeof(struct ieee80211_frame_info)); |
| 2902 | |
| 2903 | msg = (struct ieee80211_radar_info *) |
| 2904 | skb_put(skb, sizeof(struct ieee80211_radar_info)); |
| 2905 | msg->channel = channel; |
| 2906 | msg->radar = radar; |
| 2907 | msg->radar_type = radar_type; |
| 2908 | |
| 2909 | ieee80211_rx_mgmt(local, skb, NULL, ieee80211_msg_radar); |
| 2910 | return 0; |
| 2911 | } |
| 2912 | EXPORT_SYMBOL(ieee80211_radar_status); |
| 2913 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2914 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2915 | static ieee80211_txrx_result |
| 2916 | ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx) |
| 2917 | { |
| 2918 | struct ieee80211_local *local = tx->local; |
| 2919 | struct ieee80211_hw_mode *mode = tx->u.tx.mode; |
| 2920 | struct sk_buff *skb = tx->skb; |
| 2921 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 2922 | u32 load = 0, hdrtime; |
| 2923 | |
| 2924 | /* TODO: this could be part of tx_status handling, so that the number |
| 2925 | * of retries would be known; TX rate should in that case be stored |
| 2926 | * somewhere with the packet */ |
| 2927 | |
| 2928 | /* Estimate total channel use caused by this frame */ |
| 2929 | |
| 2930 | /* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values, |
| 2931 | * 1 usec = 1/8 * (1080 / 10) = 13.5 */ |
| 2932 | |
| 2933 | if (mode->mode == MODE_IEEE80211A || |
| 2934 | mode->mode == MODE_ATHEROS_TURBO || |
| 2935 | mode->mode == MODE_ATHEROS_TURBOG || |
| 2936 | (mode->mode == MODE_IEEE80211G && |
| 2937 | tx->u.tx.rate->flags & IEEE80211_RATE_ERP)) |
| 2938 | hdrtime = CHAN_UTIL_HDR_SHORT; |
| 2939 | else |
| 2940 | hdrtime = CHAN_UTIL_HDR_LONG; |
| 2941 | |
| 2942 | load = hdrtime; |
| 2943 | if (!is_multicast_ether_addr(hdr->addr1)) |
| 2944 | load += hdrtime; |
| 2945 | |
| 2946 | if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_RTS_CTS) |
| 2947 | load += 2 * hdrtime; |
| 2948 | else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) |
| 2949 | load += hdrtime; |
| 2950 | |
| 2951 | load += skb->len * tx->u.tx.rate->rate_inv; |
| 2952 | |
| 2953 | if (tx->u.tx.extra_frag) { |
| 2954 | int i; |
| 2955 | for (i = 0; i < tx->u.tx.num_extra_frag; i++) { |
| 2956 | load += 2 * hdrtime; |
| 2957 | load += tx->u.tx.extra_frag[i]->len * |
| 2958 | tx->u.tx.rate->rate; |
| 2959 | } |
| 2960 | } |
| 2961 | |
| 2962 | /* Divide channel_use by 8 to avoid wrapping around the counter */ |
| 2963 | load >>= CHAN_UTIL_SHIFT; |
| 2964 | local->channel_use_raw += load; |
| 2965 | if (tx->sta) |
| 2966 | tx->sta->channel_use_raw += load; |
| 2967 | tx->sdata->channel_use_raw += load; |
| 2968 | |
| 2969 | return TXRX_CONTINUE; |
| 2970 | } |
| 2971 | |
| 2972 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 2973 | static void ieee80211_stat_refresh(unsigned long data) |
| 2974 | { |
| 2975 | struct ieee80211_local *local = (struct ieee80211_local *) data; |
| 2976 | struct sta_info *sta; |
| 2977 | struct ieee80211_sub_if_data *sdata; |
| 2978 | |
| 2979 | if (!local->stat_time) |
| 2980 | return; |
| 2981 | |
| 2982 | /* go through all stations */ |
| 2983 | spin_lock_bh(&local->sta_lock); |
| 2984 | list_for_each_entry(sta, &local->sta_list, list) { |
| 2985 | sta->channel_use = (sta->channel_use_raw / local->stat_time) / |
| 2986 | CHAN_UTIL_PER_10MS; |
| 2987 | sta->channel_use_raw = 0; |
| 2988 | } |
| 2989 | spin_unlock_bh(&local->sta_lock); |
| 2990 | |
| 2991 | /* go through all subinterfaces */ |
| 2992 | read_lock(&local->sub_if_lock); |
| 2993 | list_for_each_entry(sdata, &local->sub_if_list, list) { |
| 2994 | sdata->channel_use = (sdata->channel_use_raw / |
| 2995 | local->stat_time) / CHAN_UTIL_PER_10MS; |
| 2996 | sdata->channel_use_raw = 0; |
| 2997 | } |
| 2998 | read_unlock(&local->sub_if_lock); |
| 2999 | |
| 3000 | /* hardware interface */ |
| 3001 | local->channel_use = (local->channel_use_raw / |
| 3002 | local->stat_time) / CHAN_UTIL_PER_10MS; |
| 3003 | local->channel_use_raw = 0; |
| 3004 | |
| 3005 | local->stat_timer.expires = jiffies + HZ * local->stat_time / 100; |
| 3006 | add_timer(&local->stat_timer); |
| 3007 | } |
| 3008 | |
| 3009 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3010 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
| 3011 | struct sk_buff *skb, |
| 3012 | struct ieee80211_tx_status *status) |
| 3013 | { |
| 3014 | struct ieee80211_local *local = hw_to_local(hw); |
| 3015 | struct ieee80211_tx_status *saved; |
| 3016 | int tmp; |
| 3017 | |
| 3018 | skb->dev = local->mdev; |
| 3019 | saved = kmalloc(sizeof(struct ieee80211_tx_status), GFP_ATOMIC); |
| 3020 | if (unlikely(!saved)) { |
| 3021 | if (net_ratelimit()) |
| 3022 | printk(KERN_WARNING "%s: Not enough memory, " |
| 3023 | "dropping tx status", skb->dev->name); |
| 3024 | /* should be dev_kfree_skb_irq, but due to this function being |
| 3025 | * named _irqsafe instead of just _irq we can't be sure that |
| 3026 | * people won't call it from non-irq contexts */ |
| 3027 | dev_kfree_skb_any(skb); |
| 3028 | return; |
| 3029 | } |
| 3030 | memcpy(saved, status, sizeof(struct ieee80211_tx_status)); |
| 3031 | /* copy pointer to saved status into skb->cb for use by tasklet */ |
| 3032 | memcpy(skb->cb, &saved, sizeof(saved)); |
| 3033 | |
| 3034 | skb->pkt_type = IEEE80211_TX_STATUS_MSG; |
| 3035 | skb_queue_tail(status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS ? |
| 3036 | &local->skb_queue : &local->skb_queue_unreliable, skb); |
| 3037 | tmp = skb_queue_len(&local->skb_queue) + |
| 3038 | skb_queue_len(&local->skb_queue_unreliable); |
| 3039 | while (tmp > IEEE80211_IRQSAFE_QUEUE_LIMIT && |
| 3040 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| 3041 | memcpy(&saved, skb->cb, sizeof(saved)); |
| 3042 | kfree(saved); |
| 3043 | dev_kfree_skb_irq(skb); |
| 3044 | tmp--; |
| 3045 | I802_DEBUG_INC(local->tx_status_drop); |
| 3046 | } |
| 3047 | tasklet_schedule(&local->tasklet); |
| 3048 | } |
| 3049 | EXPORT_SYMBOL(ieee80211_tx_status_irqsafe); |
| 3050 | |
| 3051 | static void ieee80211_tasklet_handler(unsigned long data) |
| 3052 | { |
| 3053 | struct ieee80211_local *local = (struct ieee80211_local *) data; |
| 3054 | struct sk_buff *skb; |
| 3055 | struct ieee80211_rx_status rx_status; |
| 3056 | struct ieee80211_tx_status *tx_status; |
| 3057 | |
| 3058 | while ((skb = skb_dequeue(&local->skb_queue)) || |
| 3059 | (skb = skb_dequeue(&local->skb_queue_unreliable))) { |
| 3060 | switch (skb->pkt_type) { |
| 3061 | case IEEE80211_RX_MSG: |
| 3062 | /* status is in skb->cb */ |
| 3063 | memcpy(&rx_status, skb->cb, sizeof(rx_status)); |
| 3064 | /* Clear skb->type in order to not confuse kernel |
| 3065 | * netstack. */ |
| 3066 | skb->pkt_type = 0; |
| 3067 | __ieee80211_rx(local_to_hw(local), skb, &rx_status); |
| 3068 | break; |
| 3069 | case IEEE80211_TX_STATUS_MSG: |
| 3070 | /* get pointer to saved status out of skb->cb */ |
| 3071 | memcpy(&tx_status, skb->cb, sizeof(tx_status)); |
| 3072 | skb->pkt_type = 0; |
| 3073 | ieee80211_tx_status(local_to_hw(local), |
| 3074 | skb, tx_status); |
| 3075 | kfree(tx_status); |
| 3076 | break; |
| 3077 | default: /* should never get here! */ |
| 3078 | printk(KERN_ERR "%s: Unknown message type (%d)\n", |
| 3079 | local->mdev->name, skb->pkt_type); |
| 3080 | dev_kfree_skb(skb); |
| 3081 | break; |
| 3082 | } |
| 3083 | } |
| 3084 | } |
| 3085 | |
| 3086 | |
| 3087 | /* Remove added headers (e.g., QoS control), encryption header/MIC, etc. to |
| 3088 | * make a prepared TX frame (one that has been given to hw) to look like brand |
| 3089 | * new IEEE 802.11 frame that is ready to go through TX processing again. |
| 3090 | * Also, tx_packet_data in cb is restored from tx_control. */ |
| 3091 | static void ieee80211_remove_tx_extra(struct ieee80211_local *local, |
| 3092 | struct ieee80211_key *key, |
| 3093 | struct sk_buff *skb, |
| 3094 | struct ieee80211_tx_control *control) |
| 3095 | { |
| 3096 | int hdrlen, iv_len, mic_len; |
| 3097 | struct ieee80211_tx_packet_data *pkt_data; |
| 3098 | |
| 3099 | pkt_data = (struct ieee80211_tx_packet_data *)skb->cb; |
| 3100 | pkt_data->ifindex = control->ifindex; |
| 3101 | pkt_data->mgmt_iface = (control->type == IEEE80211_IF_TYPE_MGMT); |
| 3102 | pkt_data->req_tx_status = !!(control->flags & IEEE80211_TXCTL_REQ_TX_STATUS); |
| 3103 | pkt_data->do_not_encrypt = !!(control->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT); |
| 3104 | pkt_data->requeue = !!(control->flags & IEEE80211_TXCTL_REQUEUE); |
| 3105 | pkt_data->queue = control->queue; |
| 3106 | |
| 3107 | hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| 3108 | |
| 3109 | if (!key) |
| 3110 | goto no_key; |
| 3111 | |
| 3112 | switch (key->alg) { |
| 3113 | case ALG_WEP: |
| 3114 | iv_len = WEP_IV_LEN; |
| 3115 | mic_len = WEP_ICV_LEN; |
| 3116 | break; |
| 3117 | case ALG_TKIP: |
| 3118 | iv_len = TKIP_IV_LEN; |
| 3119 | mic_len = TKIP_ICV_LEN; |
| 3120 | break; |
| 3121 | case ALG_CCMP: |
| 3122 | iv_len = CCMP_HDR_LEN; |
| 3123 | mic_len = CCMP_MIC_LEN; |
| 3124 | break; |
| 3125 | default: |
| 3126 | goto no_key; |
| 3127 | } |
| 3128 | |
| 3129 | if (skb->len >= mic_len && key->force_sw_encrypt) |
| 3130 | skb_trim(skb, skb->len - mic_len); |
| 3131 | if (skb->len >= iv_len && skb->len > hdrlen) { |
| 3132 | memmove(skb->data + iv_len, skb->data, hdrlen); |
| 3133 | skb_pull(skb, iv_len); |
| 3134 | } |
| 3135 | |
| 3136 | no_key: |
| 3137 | { |
| 3138 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 3139 | u16 fc = le16_to_cpu(hdr->frame_control); |
| 3140 | if ((fc & 0x8C) == 0x88) /* QoS Control Field */ { |
| 3141 | fc &= ~IEEE80211_STYPE_QOS_DATA; |
| 3142 | hdr->frame_control = cpu_to_le16(fc); |
| 3143 | memmove(skb->data + 2, skb->data, hdrlen - 2); |
| 3144 | skb_pull(skb, 2); |
| 3145 | } |
| 3146 | } |
| 3147 | } |
| 3148 | |
| 3149 | |
| 3150 | void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, |
| 3151 | struct ieee80211_tx_status *status) |
| 3152 | { |
| 3153 | struct sk_buff *skb2; |
| 3154 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| 3155 | struct ieee80211_local *local = hw_to_local(hw); |
| 3156 | u16 frag, type; |
| 3157 | u32 msg_type; |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 3158 | struct ieee80211_tx_status_rtap_hdr *rthdr; |
| 3159 | struct ieee80211_sub_if_data *sdata; |
| 3160 | int monitors; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3161 | |
| 3162 | if (!status) { |
| 3163 | printk(KERN_ERR |
| 3164 | "%s: ieee80211_tx_status called with NULL status\n", |
| 3165 | local->mdev->name); |
| 3166 | dev_kfree_skb(skb); |
| 3167 | return; |
| 3168 | } |
| 3169 | |
| 3170 | if (status->excessive_retries) { |
| 3171 | struct sta_info *sta; |
| 3172 | sta = sta_info_get(local, hdr->addr1); |
| 3173 | if (sta) { |
| 3174 | if (sta->flags & WLAN_STA_PS) { |
| 3175 | /* The STA is in power save mode, so assume |
| 3176 | * that this TX packet failed because of that. |
| 3177 | */ |
| 3178 | status->excessive_retries = 0; |
| 3179 | status->flags |= IEEE80211_TX_STATUS_TX_FILTERED; |
| 3180 | } |
| 3181 | sta_info_put(sta); |
| 3182 | } |
| 3183 | } |
| 3184 | |
| 3185 | if (status->flags & IEEE80211_TX_STATUS_TX_FILTERED) { |
| 3186 | struct sta_info *sta; |
| 3187 | sta = sta_info_get(local, hdr->addr1); |
| 3188 | if (sta) { |
| 3189 | sta->tx_filtered_count++; |
| 3190 | |
| 3191 | /* Clear the TX filter mask for this STA when sending |
| 3192 | * the next packet. If the STA went to power save mode, |
| 3193 | * this will happen when it is waking up for the next |
| 3194 | * time. */ |
| 3195 | sta->clear_dst_mask = 1; |
| 3196 | |
| 3197 | /* TODO: Is the WLAN_STA_PS flag always set here or is |
| 3198 | * the race between RX and TX status causing some |
| 3199 | * packets to be filtered out before 80211.o gets an |
| 3200 | * update for PS status? This seems to be the case, so |
| 3201 | * no changes are likely to be needed. */ |
| 3202 | if (sta->flags & WLAN_STA_PS && |
| 3203 | skb_queue_len(&sta->tx_filtered) < |
| 3204 | STA_MAX_TX_BUFFER) { |
| 3205 | ieee80211_remove_tx_extra(local, sta->key, |
| 3206 | skb, |
| 3207 | &status->control); |
| 3208 | skb_queue_tail(&sta->tx_filtered, skb); |
| 3209 | } else if (!(sta->flags & WLAN_STA_PS) && |
| 3210 | !(status->control.flags & IEEE80211_TXCTL_REQUEUE)) { |
| 3211 | /* Software retry the packet once */ |
| 3212 | status->control.flags |= IEEE80211_TXCTL_REQUEUE; |
| 3213 | ieee80211_remove_tx_extra(local, sta->key, |
| 3214 | skb, |
| 3215 | &status->control); |
| 3216 | dev_queue_xmit(skb); |
| 3217 | } else { |
| 3218 | if (net_ratelimit()) { |
| 3219 | printk(KERN_DEBUG "%s: dropped TX " |
| 3220 | "filtered frame queue_len=%d " |
| 3221 | "PS=%d @%lu\n", |
| 3222 | local->mdev->name, |
| 3223 | skb_queue_len( |
| 3224 | &sta->tx_filtered), |
| 3225 | !!(sta->flags & WLAN_STA_PS), |
| 3226 | jiffies); |
| 3227 | } |
| 3228 | dev_kfree_skb(skb); |
| 3229 | } |
| 3230 | sta_info_put(sta); |
| 3231 | return; |
| 3232 | } |
| 3233 | } else { |
| 3234 | /* FIXME: STUPID to call this with both local and local->mdev */ |
| 3235 | rate_control_tx_status(local, local->mdev, skb, status); |
| 3236 | } |
| 3237 | |
| 3238 | ieee80211_led_tx(local, 0); |
| 3239 | |
| 3240 | /* SNMP counters |
| 3241 | * Fragments are passed to low-level drivers as separate skbs, so these |
| 3242 | * are actually fragments, not frames. Update frame counters only for |
| 3243 | * the first fragment of the frame. */ |
| 3244 | |
| 3245 | frag = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG; |
| 3246 | type = le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_FTYPE; |
| 3247 | |
| 3248 | if (status->flags & IEEE80211_TX_STATUS_ACK) { |
| 3249 | if (frag == 0) { |
| 3250 | local->dot11TransmittedFrameCount++; |
| 3251 | if (is_multicast_ether_addr(hdr->addr1)) |
| 3252 | local->dot11MulticastTransmittedFrameCount++; |
| 3253 | if (status->retry_count > 0) |
| 3254 | local->dot11RetryCount++; |
| 3255 | if (status->retry_count > 1) |
| 3256 | local->dot11MultipleRetryCount++; |
| 3257 | } |
| 3258 | |
| 3259 | /* This counter shall be incremented for an acknowledged MPDU |
| 3260 | * with an individual address in the address 1 field or an MPDU |
| 3261 | * with a multicast address in the address 1 field of type Data |
| 3262 | * or Management. */ |
| 3263 | if (!is_multicast_ether_addr(hdr->addr1) || |
| 3264 | type == IEEE80211_FTYPE_DATA || |
| 3265 | type == IEEE80211_FTYPE_MGMT) |
| 3266 | local->dot11TransmittedFragmentCount++; |
| 3267 | } else { |
| 3268 | if (frag == 0) |
| 3269 | local->dot11FailedCount++; |
| 3270 | } |
| 3271 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3272 | msg_type = (status->flags & IEEE80211_TX_STATUS_ACK) ? |
| 3273 | ieee80211_msg_tx_callback_ack : ieee80211_msg_tx_callback_fail; |
| 3274 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 3275 | /* this was a transmitted frame, but now we want to reuse it */ |
| 3276 | skb_orphan(skb); |
| 3277 | |
| 3278 | if ((status->control.flags & IEEE80211_TXCTL_REQ_TX_STATUS) && |
| 3279 | local->apdev) { |
| 3280 | if (local->monitors) { |
| 3281 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 3282 | } else { |
| 3283 | skb2 = skb; |
| 3284 | skb = NULL; |
| 3285 | } |
| 3286 | |
| 3287 | if (skb2) |
| 3288 | /* Send frame to hostapd */ |
| 3289 | ieee80211_rx_mgmt(local, skb2, NULL, msg_type); |
| 3290 | |
| 3291 | if (!skb) |
| 3292 | return; |
| 3293 | } |
| 3294 | |
| 3295 | if (!local->monitors) { |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3296 | dev_kfree_skb(skb); |
| 3297 | return; |
| 3298 | } |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3299 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 3300 | /* send frame to monitor interfaces now */ |
| 3301 | |
| 3302 | if (skb_headroom(skb) < sizeof(*rthdr)) { |
| 3303 | printk(KERN_ERR "ieee80211_tx_status: headroom too small\n"); |
| 3304 | dev_kfree_skb(skb); |
| 3305 | return; |
| 3306 | } |
| 3307 | |
| 3308 | rthdr = (struct ieee80211_tx_status_rtap_hdr*) |
| 3309 | skb_push(skb, sizeof(*rthdr)); |
| 3310 | |
| 3311 | memset(rthdr, 0, sizeof(*rthdr)); |
| 3312 | rthdr->hdr.it_len = cpu_to_le16(sizeof(*rthdr)); |
| 3313 | rthdr->hdr.it_present = |
| 3314 | cpu_to_le32((1 << IEEE80211_RADIOTAP_TX_FLAGS) | |
| 3315 | (1 << IEEE80211_RADIOTAP_DATA_RETRIES)); |
| 3316 | |
| 3317 | if (!(status->flags & IEEE80211_TX_STATUS_ACK) && |
| 3318 | !is_multicast_ether_addr(hdr->addr1)) |
| 3319 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_FAIL); |
| 3320 | |
| 3321 | if ((status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) && |
| 3322 | (status->control.flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) |
| 3323 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_CTS); |
| 3324 | else if (status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) |
| 3325 | rthdr->tx_flags |= cpu_to_le16(IEEE80211_RADIOTAP_F_TX_RTS); |
| 3326 | |
| 3327 | rthdr->data_retries = status->retry_count; |
| 3328 | |
| 3329 | read_lock(&local->sub_if_lock); |
| 3330 | monitors = local->monitors; |
| 3331 | list_for_each_entry(sdata, &local->sub_if_list, list) { |
| 3332 | /* |
| 3333 | * Using the monitors counter is possibly racy, but |
| 3334 | * if the value is wrong we simply either clone the skb |
| 3335 | * once too much or forget sending it to one monitor iface |
| 3336 | * The latter case isn't nice but fixing the race is much |
| 3337 | * more complicated. |
| 3338 | */ |
| 3339 | if (!monitors || !skb) |
| 3340 | goto out; |
| 3341 | |
| 3342 | if (sdata->type == IEEE80211_IF_TYPE_MNTR) { |
| 3343 | if (!netif_running(sdata->dev)) |
| 3344 | continue; |
| 3345 | monitors--; |
| 3346 | if (monitors) |
| 3347 | skb2 = skb_clone(skb, GFP_KERNEL); |
| 3348 | else |
| 3349 | skb2 = NULL; |
| 3350 | skb->dev = sdata->dev; |
| 3351 | /* XXX: is this sufficient for BPF? */ |
| 3352 | skb_set_mac_header(skb, 0); |
| 3353 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 3354 | skb->pkt_type = PACKET_OTHERHOST; |
| 3355 | skb->protocol = htons(ETH_P_802_2); |
| 3356 | memset(skb->cb, 0, sizeof(skb->cb)); |
| 3357 | netif_rx(skb); |
| 3358 | skb = skb2; |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 3359 | } |
| 3360 | } |
| 3361 | out: |
| 3362 | read_unlock(&local->sub_if_lock); |
| 3363 | if (skb) |
| 3364 | dev_kfree_skb(skb); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3365 | } |
| 3366 | EXPORT_SYMBOL(ieee80211_tx_status); |
| 3367 | |
| 3368 | /* TODO: implement register/unregister functions for adding TX/RX handlers |
| 3369 | * into ordered list */ |
| 3370 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3371 | static ieee80211_tx_handler ieee80211_tx_handlers[] = |
| 3372 | { |
| 3373 | ieee80211_tx_h_check_assoc, |
| 3374 | ieee80211_tx_h_sequence, |
| 3375 | ieee80211_tx_h_ps_buf, |
| 3376 | ieee80211_tx_h_select_key, |
| 3377 | ieee80211_tx_h_michael_mic_add, |
| 3378 | ieee80211_tx_h_fragment, |
| 3379 | ieee80211_tx_h_tkip_encrypt, |
| 3380 | ieee80211_tx_h_ccmp_encrypt, |
| 3381 | ieee80211_tx_h_wep_encrypt, |
| 3382 | ieee80211_tx_h_rate_ctrl, |
| 3383 | ieee80211_tx_h_misc, |
| 3384 | ieee80211_tx_h_load_stats, |
| 3385 | NULL |
| 3386 | }; |
| 3387 | |
| 3388 | |
| 3389 | int ieee80211_if_update_wds(struct net_device *dev, u8 *remote_addr) |
| 3390 | { |
| 3391 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); |
| 3392 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 3393 | struct sta_info *sta; |
| 3394 | |
| 3395 | if (compare_ether_addr(remote_addr, sdata->u.wds.remote_addr) == 0) |
| 3396 | return 0; |
| 3397 | |
| 3398 | /* Create STA entry for the new peer */ |
| 3399 | sta = sta_info_add(local, dev, remote_addr, GFP_KERNEL); |
| 3400 | if (!sta) |
| 3401 | return -ENOMEM; |
| 3402 | sta_info_put(sta); |
| 3403 | |
| 3404 | /* Remove STA entry for the old peer */ |
| 3405 | sta = sta_info_get(local, sdata->u.wds.remote_addr); |
| 3406 | if (sta) { |
| 3407 | sta_info_put(sta); |
| 3408 | sta_info_free(sta, 0); |
| 3409 | } else { |
| 3410 | printk(KERN_DEBUG "%s: could not find STA entry for WDS link " |
| 3411 | "peer " MAC_FMT "\n", |
| 3412 | dev->name, MAC_ARG(sdata->u.wds.remote_addr)); |
| 3413 | } |
| 3414 | |
| 3415 | /* Update WDS link data */ |
| 3416 | memcpy(&sdata->u.wds.remote_addr, remote_addr, ETH_ALEN); |
| 3417 | |
| 3418 | return 0; |
| 3419 | } |
| 3420 | |
| 3421 | /* Must not be called for mdev and apdev */ |
| 3422 | void ieee80211_if_setup(struct net_device *dev) |
| 3423 | { |
| 3424 | ether_setup(dev); |
| 3425 | dev->hard_start_xmit = ieee80211_subif_start_xmit; |
| 3426 | dev->wireless_handlers = &ieee80211_iw_handler_def; |
| 3427 | dev->set_multicast_list = ieee80211_set_multicast_list; |
| 3428 | dev->change_mtu = ieee80211_change_mtu; |
| 3429 | dev->get_stats = ieee80211_get_stats; |
| 3430 | dev->open = ieee80211_open; |
| 3431 | dev->stop = ieee80211_stop; |
| 3432 | dev->uninit = ieee80211_if_reinit; |
| 3433 | dev->destructor = ieee80211_if_free; |
| 3434 | } |
| 3435 | |
| 3436 | void ieee80211_if_mgmt_setup(struct net_device *dev) |
| 3437 | { |
| 3438 | ether_setup(dev); |
| 3439 | dev->hard_start_xmit = ieee80211_mgmt_start_xmit; |
| 3440 | dev->change_mtu = ieee80211_change_mtu_apdev; |
| 3441 | dev->get_stats = ieee80211_get_stats; |
| 3442 | dev->open = ieee80211_mgmt_open; |
| 3443 | dev->stop = ieee80211_mgmt_stop; |
| 3444 | dev->type = ARPHRD_IEEE80211_PRISM; |
| 3445 | dev->hard_header_parse = header_parse_80211; |
| 3446 | dev->uninit = ieee80211_if_reinit; |
| 3447 | dev->destructor = ieee80211_if_free; |
| 3448 | } |
| 3449 | |
| 3450 | int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, |
| 3451 | const char *name) |
| 3452 | { |
| 3453 | struct rate_control_ref *ref, *old; |
| 3454 | |
| 3455 | ASSERT_RTNL(); |
| 3456 | if (local->open_count || netif_running(local->mdev) || |
| 3457 | (local->apdev && netif_running(local->apdev))) |
| 3458 | return -EBUSY; |
| 3459 | |
| 3460 | ref = rate_control_alloc(name, local); |
| 3461 | if (!ref) { |
| 3462 | printk(KERN_WARNING "%s: Failed to select rate control " |
| 3463 | "algorithm\n", local->mdev->name); |
| 3464 | return -ENOENT; |
| 3465 | } |
| 3466 | |
| 3467 | old = local->rate_ctrl; |
| 3468 | local->rate_ctrl = ref; |
| 3469 | if (old) { |
| 3470 | rate_control_put(old); |
| 3471 | sta_info_flush(local, NULL); |
| 3472 | } |
| 3473 | |
| 3474 | printk(KERN_DEBUG "%s: Selected rate control " |
| 3475 | "algorithm '%s'\n", local->mdev->name, |
| 3476 | ref->ops->name); |
| 3477 | |
| 3478 | |
| 3479 | return 0; |
| 3480 | } |
| 3481 | |
| 3482 | static void rate_control_deinitialize(struct ieee80211_local *local) |
| 3483 | { |
| 3484 | struct rate_control_ref *ref; |
| 3485 | |
| 3486 | ref = local->rate_ctrl; |
| 3487 | local->rate_ctrl = NULL; |
| 3488 | rate_control_put(ref); |
| 3489 | } |
| 3490 | |
| 3491 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, |
| 3492 | const struct ieee80211_ops *ops) |
| 3493 | { |
| 3494 | struct net_device *mdev; |
| 3495 | struct ieee80211_local *local; |
| 3496 | struct ieee80211_sub_if_data *sdata; |
| 3497 | int priv_size; |
| 3498 | struct wiphy *wiphy; |
| 3499 | |
| 3500 | /* Ensure 32-byte alignment of our private data and hw private data. |
| 3501 | * We use the wiphy priv data for both our ieee80211_local and for |
| 3502 | * the driver's private data |
| 3503 | * |
| 3504 | * In memory it'll be like this: |
| 3505 | * |
| 3506 | * +-------------------------+ |
| 3507 | * | struct wiphy | |
| 3508 | * +-------------------------+ |
| 3509 | * | struct ieee80211_local | |
| 3510 | * +-------------------------+ |
| 3511 | * | driver's private data | |
| 3512 | * +-------------------------+ |
| 3513 | * |
| 3514 | */ |
| 3515 | priv_size = ((sizeof(struct ieee80211_local) + |
| 3516 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST) + |
| 3517 | priv_data_len; |
| 3518 | |
| 3519 | wiphy = wiphy_new(&mac80211_config_ops, priv_size); |
| 3520 | |
| 3521 | if (!wiphy) |
| 3522 | return NULL; |
| 3523 | |
| 3524 | wiphy->privid = mac80211_wiphy_privid; |
| 3525 | |
| 3526 | local = wiphy_priv(wiphy); |
| 3527 | local->hw.wiphy = wiphy; |
| 3528 | |
| 3529 | local->hw.priv = (char *)local + |
| 3530 | ((sizeof(struct ieee80211_local) + |
| 3531 | NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); |
| 3532 | |
Johannes Berg | 4480f15c | 2007-07-10 19:32:10 +0200 | [diff] [blame] | 3533 | BUG_ON(!ops->tx); |
| 3534 | BUG_ON(!ops->config); |
| 3535 | BUG_ON(!ops->add_interface); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3536 | local->ops = ops; |
| 3537 | |
| 3538 | /* for now, mdev needs sub_if_data :/ */ |
| 3539 | mdev = alloc_netdev(sizeof(struct ieee80211_sub_if_data), |
| 3540 | "wmaster%d", ether_setup); |
| 3541 | if (!mdev) { |
| 3542 | wiphy_free(wiphy); |
| 3543 | return NULL; |
| 3544 | } |
| 3545 | |
| 3546 | sdata = IEEE80211_DEV_TO_SUB_IF(mdev); |
| 3547 | mdev->ieee80211_ptr = &sdata->wdev; |
| 3548 | sdata->wdev.wiphy = wiphy; |
| 3549 | |
| 3550 | local->hw.queues = 1; /* default */ |
| 3551 | |
| 3552 | local->mdev = mdev; |
| 3553 | local->rx_pre_handlers = ieee80211_rx_pre_handlers; |
| 3554 | local->rx_handlers = ieee80211_rx_handlers; |
| 3555 | local->tx_handlers = ieee80211_tx_handlers; |
| 3556 | |
| 3557 | local->bridge_packets = 1; |
| 3558 | |
| 3559 | local->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD; |
| 3560 | local->fragmentation_threshold = IEEE80211_MAX_FRAG_THRESHOLD; |
| 3561 | local->short_retry_limit = 7; |
| 3562 | local->long_retry_limit = 4; |
| 3563 | local->hw.conf.radio_enabled = 1; |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3564 | |
| 3565 | local->enabled_modes = (unsigned int) -1; |
| 3566 | |
| 3567 | INIT_LIST_HEAD(&local->modes_list); |
| 3568 | |
| 3569 | rwlock_init(&local->sub_if_lock); |
| 3570 | INIT_LIST_HEAD(&local->sub_if_list); |
| 3571 | |
| 3572 | INIT_DELAYED_WORK(&local->scan_work, ieee80211_sta_scan_work); |
| 3573 | init_timer(&local->stat_timer); |
| 3574 | local->stat_timer.function = ieee80211_stat_refresh; |
| 3575 | local->stat_timer.data = (unsigned long) local; |
| 3576 | ieee80211_rx_bss_list_init(mdev); |
| 3577 | |
| 3578 | sta_info_init(local); |
| 3579 | |
| 3580 | mdev->hard_start_xmit = ieee80211_master_start_xmit; |
| 3581 | mdev->open = ieee80211_master_open; |
| 3582 | mdev->stop = ieee80211_master_stop; |
| 3583 | mdev->type = ARPHRD_IEEE80211; |
| 3584 | mdev->hard_header_parse = header_parse_80211; |
| 3585 | |
| 3586 | sdata->type = IEEE80211_IF_TYPE_AP; |
| 3587 | sdata->dev = mdev; |
| 3588 | sdata->local = local; |
| 3589 | sdata->u.ap.force_unicast_rateidx = -1; |
| 3590 | sdata->u.ap.max_ratectrl_rateidx = -1; |
| 3591 | ieee80211_if_sdata_init(sdata); |
| 3592 | list_add_tail(&sdata->list, &local->sub_if_list); |
| 3593 | |
| 3594 | tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, |
| 3595 | (unsigned long)local); |
| 3596 | tasklet_disable(&local->tx_pending_tasklet); |
| 3597 | |
| 3598 | tasklet_init(&local->tasklet, |
| 3599 | ieee80211_tasklet_handler, |
| 3600 | (unsigned long) local); |
| 3601 | tasklet_disable(&local->tasklet); |
| 3602 | |
| 3603 | skb_queue_head_init(&local->skb_queue); |
| 3604 | skb_queue_head_init(&local->skb_queue_unreliable); |
| 3605 | |
| 3606 | return local_to_hw(local); |
| 3607 | } |
| 3608 | EXPORT_SYMBOL(ieee80211_alloc_hw); |
| 3609 | |
| 3610 | int ieee80211_register_hw(struct ieee80211_hw *hw) |
| 3611 | { |
| 3612 | struct ieee80211_local *local = hw_to_local(hw); |
| 3613 | const char *name; |
| 3614 | int result; |
| 3615 | |
| 3616 | result = wiphy_register(local->hw.wiphy); |
| 3617 | if (result < 0) |
| 3618 | return result; |
| 3619 | |
| 3620 | name = wiphy_dev(local->hw.wiphy)->driver->name; |
| 3621 | local->hw.workqueue = create_singlethread_workqueue(name); |
| 3622 | if (!local->hw.workqueue) { |
| 3623 | result = -ENOMEM; |
| 3624 | goto fail_workqueue; |
| 3625 | } |
| 3626 | |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 3627 | /* |
| 3628 | * The hardware needs headroom for sending the frame, |
| 3629 | * and we need some headroom for passing the frame to monitor |
| 3630 | * interfaces, but never both at the same time. |
| 3631 | */ |
Jiri Benc | 33ccad3 | 2007-07-18 17:10:44 +0200 | [diff] [blame] | 3632 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
| 3633 | sizeof(struct ieee80211_tx_status_rtap_hdr)); |
Johannes Berg | b306f45 | 2007-07-10 19:32:08 +0200 | [diff] [blame] | 3634 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3635 | debugfs_hw_add(local); |
| 3636 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3637 | local->hw.conf.beacon_int = 1000; |
| 3638 | |
| 3639 | local->wstats_flags |= local->hw.max_rssi ? |
| 3640 | IW_QUAL_LEVEL_UPDATED : IW_QUAL_LEVEL_INVALID; |
| 3641 | local->wstats_flags |= local->hw.max_signal ? |
| 3642 | IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID; |
| 3643 | local->wstats_flags |= local->hw.max_noise ? |
| 3644 | IW_QUAL_NOISE_UPDATED : IW_QUAL_NOISE_INVALID; |
| 3645 | if (local->hw.max_rssi < 0 || local->hw.max_noise < 0) |
| 3646 | local->wstats_flags |= IW_QUAL_DBM; |
| 3647 | |
| 3648 | result = sta_info_start(local); |
| 3649 | if (result < 0) |
| 3650 | goto fail_sta_info; |
| 3651 | |
| 3652 | rtnl_lock(); |
| 3653 | result = dev_alloc_name(local->mdev, local->mdev->name); |
| 3654 | if (result < 0) |
| 3655 | goto fail_dev; |
| 3656 | |
| 3657 | memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr, ETH_ALEN); |
| 3658 | SET_NETDEV_DEV(local->mdev, wiphy_dev(local->hw.wiphy)); |
| 3659 | |
| 3660 | result = register_netdevice(local->mdev); |
| 3661 | if (result < 0) |
| 3662 | goto fail_dev; |
| 3663 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3664 | ieee80211_debugfs_add_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
| 3665 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3666 | result = ieee80211_init_rate_ctrl_alg(local, NULL); |
| 3667 | if (result < 0) { |
| 3668 | printk(KERN_DEBUG "%s: Failed to initialize rate control " |
| 3669 | "algorithm\n", local->mdev->name); |
| 3670 | goto fail_rate; |
| 3671 | } |
| 3672 | |
| 3673 | result = ieee80211_wep_init(local); |
| 3674 | |
| 3675 | if (result < 0) { |
| 3676 | printk(KERN_DEBUG "%s: Failed to initialize wep\n", |
| 3677 | local->mdev->name); |
| 3678 | goto fail_wep; |
| 3679 | } |
| 3680 | |
| 3681 | ieee80211_install_qdisc(local->mdev); |
| 3682 | |
| 3683 | /* add one default STA interface */ |
| 3684 | result = ieee80211_if_add(local->mdev, "wlan%d", NULL, |
| 3685 | IEEE80211_IF_TYPE_STA); |
| 3686 | if (result) |
| 3687 | printk(KERN_WARNING "%s: Failed to add default virtual iface\n", |
| 3688 | local->mdev->name); |
| 3689 | |
| 3690 | local->reg_state = IEEE80211_DEV_REGISTERED; |
| 3691 | rtnl_unlock(); |
| 3692 | |
| 3693 | ieee80211_led_init(local); |
| 3694 | |
| 3695 | return 0; |
| 3696 | |
| 3697 | fail_wep: |
| 3698 | rate_control_deinitialize(local); |
| 3699 | fail_rate: |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3700 | ieee80211_debugfs_remove_netdev(IEEE80211_DEV_TO_SUB_IF(local->mdev)); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3701 | unregister_netdevice(local->mdev); |
| 3702 | fail_dev: |
| 3703 | rtnl_unlock(); |
| 3704 | sta_info_stop(local); |
| 3705 | fail_sta_info: |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3706 | debugfs_hw_del(local); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3707 | destroy_workqueue(local->hw.workqueue); |
| 3708 | fail_workqueue: |
| 3709 | wiphy_unregister(local->hw.wiphy); |
| 3710 | return result; |
| 3711 | } |
| 3712 | EXPORT_SYMBOL(ieee80211_register_hw); |
| 3713 | |
| 3714 | int ieee80211_register_hwmode(struct ieee80211_hw *hw, |
| 3715 | struct ieee80211_hw_mode *mode) |
| 3716 | { |
| 3717 | struct ieee80211_local *local = hw_to_local(hw); |
| 3718 | struct ieee80211_rate *rate; |
| 3719 | int i; |
| 3720 | |
| 3721 | INIT_LIST_HEAD(&mode->list); |
| 3722 | list_add_tail(&mode->list, &local->modes_list); |
| 3723 | |
| 3724 | local->hw_modes |= (1 << mode->mode); |
| 3725 | for (i = 0; i < mode->num_rates; i++) { |
| 3726 | rate = &(mode->rates[i]); |
| 3727 | rate->rate_inv = CHAN_UTIL_RATE_LCM / rate->rate; |
| 3728 | } |
| 3729 | ieee80211_prepare_rates(local, mode); |
| 3730 | |
| 3731 | if (!local->oper_hw_mode) { |
| 3732 | /* Default to this mode */ |
| 3733 | local->hw.conf.phymode = mode->mode; |
| 3734 | local->oper_hw_mode = local->scan_hw_mode = mode; |
| 3735 | local->oper_channel = local->scan_channel = &mode->channels[0]; |
| 3736 | local->hw.conf.mode = local->oper_hw_mode; |
| 3737 | local->hw.conf.chan = local->oper_channel; |
| 3738 | } |
| 3739 | |
| 3740 | if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED)) |
Daniel Drake | fd8bacc | 2007-06-09 19:07:14 +0100 | [diff] [blame] | 3741 | ieee80211_set_default_regdomain(mode); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3742 | |
| 3743 | return 0; |
| 3744 | } |
| 3745 | EXPORT_SYMBOL(ieee80211_register_hwmode); |
| 3746 | |
| 3747 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
| 3748 | { |
| 3749 | struct ieee80211_local *local = hw_to_local(hw); |
| 3750 | struct ieee80211_sub_if_data *sdata, *tmp; |
| 3751 | struct list_head tmp_list; |
| 3752 | int i; |
| 3753 | |
| 3754 | tasklet_kill(&local->tx_pending_tasklet); |
| 3755 | tasklet_kill(&local->tasklet); |
| 3756 | |
| 3757 | rtnl_lock(); |
| 3758 | |
| 3759 | BUG_ON(local->reg_state != IEEE80211_DEV_REGISTERED); |
| 3760 | |
| 3761 | local->reg_state = IEEE80211_DEV_UNREGISTERED; |
| 3762 | if (local->apdev) |
| 3763 | ieee80211_if_del_mgmt(local); |
| 3764 | |
| 3765 | write_lock_bh(&local->sub_if_lock); |
| 3766 | list_replace_init(&local->sub_if_list, &tmp_list); |
| 3767 | write_unlock_bh(&local->sub_if_lock); |
| 3768 | |
| 3769 | list_for_each_entry_safe(sdata, tmp, &tmp_list, list) |
| 3770 | __ieee80211_if_del(local, sdata); |
| 3771 | |
| 3772 | rtnl_unlock(); |
| 3773 | |
| 3774 | if (local->stat_time) |
| 3775 | del_timer_sync(&local->stat_timer); |
| 3776 | |
| 3777 | ieee80211_rx_bss_list_deinit(local->mdev); |
| 3778 | ieee80211_clear_tx_pending(local); |
| 3779 | sta_info_stop(local); |
| 3780 | rate_control_deinitialize(local); |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3781 | debugfs_hw_del(local); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3782 | |
| 3783 | for (i = 0; i < NUM_IEEE80211_MODES; i++) { |
| 3784 | kfree(local->supp_rates[i]); |
| 3785 | kfree(local->basic_rates[i]); |
| 3786 | } |
| 3787 | |
| 3788 | if (skb_queue_len(&local->skb_queue) |
| 3789 | || skb_queue_len(&local->skb_queue_unreliable)) |
| 3790 | printk(KERN_WARNING "%s: skb_queue not empty\n", |
| 3791 | local->mdev->name); |
| 3792 | skb_queue_purge(&local->skb_queue); |
| 3793 | skb_queue_purge(&local->skb_queue_unreliable); |
| 3794 | |
| 3795 | destroy_workqueue(local->hw.workqueue); |
| 3796 | wiphy_unregister(local->hw.wiphy); |
| 3797 | ieee80211_wep_free(local); |
| 3798 | ieee80211_led_exit(local); |
| 3799 | } |
| 3800 | EXPORT_SYMBOL(ieee80211_unregister_hw); |
| 3801 | |
| 3802 | void ieee80211_free_hw(struct ieee80211_hw *hw) |
| 3803 | { |
| 3804 | struct ieee80211_local *local = hw_to_local(hw); |
| 3805 | |
| 3806 | ieee80211_if_free(local->mdev); |
| 3807 | wiphy_free(local->hw.wiphy); |
| 3808 | } |
| 3809 | EXPORT_SYMBOL(ieee80211_free_hw); |
| 3810 | |
| 3811 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue) |
| 3812 | { |
| 3813 | struct ieee80211_local *local = hw_to_local(hw); |
| 3814 | |
| 3815 | if (test_and_clear_bit(IEEE80211_LINK_STATE_XOFF, |
| 3816 | &local->state[queue])) { |
| 3817 | if (test_bit(IEEE80211_LINK_STATE_PENDING, |
| 3818 | &local->state[queue])) |
| 3819 | tasklet_schedule(&local->tx_pending_tasklet); |
| 3820 | else |
| 3821 | if (!ieee80211_qdisc_installed(local->mdev)) { |
| 3822 | if (queue == 0) |
| 3823 | netif_wake_queue(local->mdev); |
| 3824 | } else |
| 3825 | __netif_schedule(local->mdev); |
| 3826 | } |
| 3827 | } |
| 3828 | EXPORT_SYMBOL(ieee80211_wake_queue); |
| 3829 | |
| 3830 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue) |
| 3831 | { |
| 3832 | struct ieee80211_local *local = hw_to_local(hw); |
| 3833 | |
| 3834 | if (!ieee80211_qdisc_installed(local->mdev) && queue == 0) |
| 3835 | netif_stop_queue(local->mdev); |
| 3836 | set_bit(IEEE80211_LINK_STATE_XOFF, &local->state[queue]); |
| 3837 | } |
| 3838 | EXPORT_SYMBOL(ieee80211_stop_queue); |
| 3839 | |
| 3840 | void ieee80211_start_queues(struct ieee80211_hw *hw) |
| 3841 | { |
| 3842 | struct ieee80211_local *local = hw_to_local(hw); |
| 3843 | int i; |
| 3844 | |
| 3845 | for (i = 0; i < local->hw.queues; i++) |
| 3846 | clear_bit(IEEE80211_LINK_STATE_XOFF, &local->state[i]); |
| 3847 | if (!ieee80211_qdisc_installed(local->mdev)) |
| 3848 | netif_start_queue(local->mdev); |
| 3849 | } |
| 3850 | EXPORT_SYMBOL(ieee80211_start_queues); |
| 3851 | |
| 3852 | void ieee80211_stop_queues(struct ieee80211_hw *hw) |
| 3853 | { |
| 3854 | int i; |
| 3855 | |
| 3856 | for (i = 0; i < hw->queues; i++) |
| 3857 | ieee80211_stop_queue(hw, i); |
| 3858 | } |
| 3859 | EXPORT_SYMBOL(ieee80211_stop_queues); |
| 3860 | |
| 3861 | void ieee80211_wake_queues(struct ieee80211_hw *hw) |
| 3862 | { |
| 3863 | int i; |
| 3864 | |
| 3865 | for (i = 0; i < hw->queues; i++) |
| 3866 | ieee80211_wake_queue(hw, i); |
| 3867 | } |
| 3868 | EXPORT_SYMBOL(ieee80211_wake_queues); |
| 3869 | |
| 3870 | struct net_device_stats *ieee80211_dev_stats(struct net_device *dev) |
| 3871 | { |
| 3872 | struct ieee80211_sub_if_data *sdata; |
| 3873 | sdata = IEEE80211_DEV_TO_SUB_IF(dev); |
| 3874 | return &sdata->stats; |
| 3875 | } |
| 3876 | |
| 3877 | static int __init ieee80211_init(void) |
| 3878 | { |
| 3879 | struct sk_buff *skb; |
| 3880 | int ret; |
| 3881 | |
| 3882 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_packet_data) > sizeof(skb->cb)); |
| 3883 | |
| 3884 | ret = ieee80211_wme_register(); |
| 3885 | if (ret) { |
| 3886 | printk(KERN_DEBUG "ieee80211_init: failed to " |
| 3887 | "initialize WME (err=%d)\n", ret); |
| 3888 | return ret; |
| 3889 | } |
| 3890 | |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3891 | ieee80211_debugfs_netdev_init(); |
Daniel Drake | fd8bacc | 2007-06-09 19:07:14 +0100 | [diff] [blame] | 3892 | ieee80211_regdomain_init(); |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3893 | |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3894 | return 0; |
| 3895 | } |
| 3896 | |
| 3897 | |
| 3898 | static void __exit ieee80211_exit(void) |
| 3899 | { |
| 3900 | ieee80211_wme_unregister(); |
Jiri Benc | e9f207f | 2007-05-05 11:46:38 -0700 | [diff] [blame] | 3901 | ieee80211_debugfs_netdev_exit(); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3902 | } |
| 3903 | |
| 3904 | |
Johannes Berg | ca9938f | 2007-09-11 12:50:32 +0200 | [diff] [blame] | 3905 | subsys_initcall(ieee80211_init); |
Jiri Benc | f0706e8 | 2007-05-05 11:45:53 -0700 | [diff] [blame] | 3906 | module_exit(ieee80211_exit); |
| 3907 | |
| 3908 | MODULE_DESCRIPTION("IEEE 802.11 subsystem"); |
| 3909 | MODULE_LICENSE("GPL"); |