Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Some parts based on code from net80211 |
| 3 | * Copyright (c) 2001 Atsushi Onoe |
| 4 | * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * Alternatively, this software may be distributed under the terms of the |
| 19 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 20 | * Software Foundation. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 23 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 24 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 25 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | * |
| 33 | */ |
| 34 | |
| 35 | #include "ieee80211softmac_priv.h" |
| 36 | |
| 37 | /* Helper functions for inserting data into the frames */ |
| 38 | |
| 39 | /* |
| 40 | * Adds an ESSID element to the frame |
| 41 | * |
| 42 | */ |
| 43 | static u8 * |
| 44 | ieee80211softmac_add_essid(u8 *dst, struct ieee80211softmac_essid *essid) |
| 45 | { |
| 46 | if (essid) { |
| 47 | *dst++ = MFIE_TYPE_SSID; |
| 48 | *dst++ = essid->len; |
| 49 | memcpy(dst, essid->data, essid->len); |
| 50 | return dst+essid->len; |
| 51 | } else { |
| 52 | *dst++ = MFIE_TYPE_SSID; |
| 53 | *dst++ = 0; |
| 54 | return dst; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /* Adds Supported Rates and if required Extended Rates Information Element |
| 59 | * to the frame, ASSUMES WE HAVE A SORTED LIST OF RATES */ |
| 60 | static u8 * |
| 61 | ieee80211softmac_frame_add_rates(u8 *dst, const struct ieee80211softmac_ratesinfo *r) |
| 62 | { |
| 63 | int cck_len, ofdm_len; |
| 64 | *dst++ = MFIE_TYPE_RATES; |
| 65 | |
| 66 | for(cck_len=0; ieee80211_is_cck_rate(r->rates[cck_len]) && (cck_len < r->count);cck_len++); |
| 67 | |
| 68 | if(cck_len > IEEE80211SOFTMAC_MAX_RATES_LEN) |
| 69 | cck_len = IEEE80211SOFTMAC_MAX_RATES_LEN; |
| 70 | *dst++ = cck_len; |
| 71 | memcpy(dst, r->rates, cck_len); |
| 72 | dst += cck_len; |
| 73 | |
| 74 | if(cck_len < r->count){ |
| 75 | for (ofdm_len=0; ieee80211_is_ofdm_rate(r->rates[ofdm_len + cck_len]) && (ofdm_len + cck_len < r->count); ofdm_len++); |
| 76 | if (ofdm_len > 0) { |
| 77 | if (ofdm_len > IEEE80211SOFTMAC_MAX_EX_RATES_LEN) |
| 78 | ofdm_len = IEEE80211SOFTMAC_MAX_EX_RATES_LEN; |
| 79 | *dst++ = MFIE_TYPE_RATES_EX; |
| 80 | *dst++ = ofdm_len; |
| 81 | memcpy(dst, r->rates + cck_len, ofdm_len); |
| 82 | dst += ofdm_len; |
| 83 | } |
| 84 | } |
| 85 | return dst; |
| 86 | } |
| 87 | |
| 88 | /* Allocate a management frame */ |
| 89 | static u8 * |
| 90 | ieee80211softmac_alloc_mgt(u32 size) |
| 91 | { |
| 92 | u8 * data; |
| 93 | |
| 94 | /* Add the header and FCS to the size */ |
| 95 | size = size + IEEE80211_3ADDR_LEN; |
| 96 | if(size > IEEE80211_DATA_LEN) |
| 97 | return NULL; |
| 98 | /* Allocate the frame */ |
| 99 | data = kmalloc(size, GFP_ATOMIC); |
| 100 | memset(data, 0, size); |
| 101 | return data; |
| 102 | } |
| 103 | |
| 104 | /* |
| 105 | * Add a 2 Address Header |
| 106 | */ |
| 107 | static void |
| 108 | ieee80211softmac_hdr_2addr(struct ieee80211softmac_device *mac, |
| 109 | struct ieee80211_hdr_2addr *header, u32 type, u8 *dest) |
| 110 | { |
| 111 | /* Fill in the frame control flags */ |
| 112 | header->frame_ctl = cpu_to_le16(type); |
| 113 | /* Control packets always have WEP turned off */ |
| 114 | if(type > IEEE80211_STYPE_CFENDACK && type < IEEE80211_STYPE_PSPOLL) |
| 115 | header->frame_ctl |= mac->ieee->sec.level ? cpu_to_le16(IEEE80211_FCTL_PROTECTED) : 0; |
| 116 | |
| 117 | /* Fill in the duration */ |
| 118 | header->duration_id = 0; |
| 119 | /* FIXME: How do I find this? |
| 120 | * calculate. But most drivers just fill in 0 (except if it's a station id of course) */ |
| 121 | |
| 122 | /* Fill in the Destination Address */ |
| 123 | if(dest == NULL) |
| 124 | memset(header->addr1, 0xFF, ETH_ALEN); |
| 125 | else |
| 126 | memcpy(header->addr1, dest, ETH_ALEN); |
| 127 | /* Fill in the Source Address */ |
| 128 | memcpy(header->addr2, mac->ieee->dev->dev_addr, ETH_ALEN); |
| 129 | |
| 130 | } |
| 131 | |
| 132 | |
| 133 | /* Add a 3 Address Header */ |
| 134 | static void |
| 135 | ieee80211softmac_hdr_3addr(struct ieee80211softmac_device *mac, |
| 136 | struct ieee80211_hdr_3addr *header, u32 type, u8 *dest, u8 *bssid) |
| 137 | { |
| 138 | /* This is common with 2addr, so use that instead */ |
| 139 | ieee80211softmac_hdr_2addr(mac, (struct ieee80211_hdr_2addr *)header, type, dest); |
| 140 | |
| 141 | /* Fill in the BSS ID */ |
| 142 | if(bssid == NULL) |
| 143 | memset(header->addr3, 0xFF, ETH_ALEN); |
| 144 | else |
| 145 | memcpy(header->addr3, bssid, ETH_ALEN); |
| 146 | |
| 147 | /* Fill in the sequence # */ |
| 148 | /* FIXME: I need to add this to the softmac struct |
| 149 | * shouldn't the sequence number be in ieee80211? */ |
| 150 | } |
| 151 | |
| 152 | |
| 153 | /***************************************************************************** |
| 154 | * Create Management packets |
| 155 | *****************************************************************************/ |
| 156 | |
| 157 | /* Creates an association request packet */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 158 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 159 | ieee80211softmac_assoc_req(struct ieee80211_assoc_request **pkt, |
| 160 | struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) |
| 161 | { |
| 162 | u8 *data; |
| 163 | (*pkt) = (struct ieee80211_assoc_request *)ieee80211softmac_alloc_mgt( |
| 164 | 2 + /* Capability Info */ |
| 165 | 2 + /* Listen Interval */ |
| 166 | /* SSID IE */ |
| 167 | 1 + 1 + IW_ESSID_MAX_SIZE + |
| 168 | /* Rates IE */ |
| 169 | 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN + |
| 170 | /* Extended Rates IE */ |
| 171 | 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN + |
| 172 | /* WPA IE if present */ |
| 173 | mac->wpa.IElen |
| 174 | /* Other IE's? Optional? |
| 175 | * Yeah, probably need an extra IE parameter -- lots of vendors like to |
| 176 | * fill in their own IEs */ |
| 177 | ); |
| 178 | if (unlikely((*pkt) == NULL)) |
| 179 | return 0; |
| 180 | ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_ASSOC_REQ, net->bssid, net->bssid); |
| 181 | |
| 182 | /* Fill in capability Info */ |
| 183 | (*pkt)->capability = (mac->ieee->iw_mode == IW_MODE_MASTER) || (mac->ieee->iw_mode == IW_MODE_INFRA) ? |
| 184 | cpu_to_le16(WLAN_CAPABILITY_ESS) : |
| 185 | cpu_to_le16(WLAN_CAPABILITY_IBSS); |
| 186 | /* Need to add this |
| 187 | (*pkt)->capability |= mac->ieee->short_slot ? |
| 188 | cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0; |
| 189 | */ |
| 190 | (*pkt)->capability |= mac->ieee->sec.level ? cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0; |
| 191 | /* Fill in Listen Interval (?) */ |
| 192 | (*pkt)->listen_interval = cpu_to_le16(10); |
| 193 | |
| 194 | data = (u8 *)(*pkt)->info_element; |
| 195 | /* Add SSID */ |
| 196 | data = ieee80211softmac_add_essid(data, &net->essid); |
| 197 | /* Add Rates */ |
| 198 | data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo); |
| 199 | /* Add WPA IE */ |
| 200 | if (mac->wpa.IElen && mac->wpa.IE) { |
| 201 | memcpy(data, mac->wpa.IE, mac->wpa.IElen); |
| 202 | data += mac->wpa.IElen; |
| 203 | } |
| 204 | /* Return the number of used bytes */ |
| 205 | return (data - (u8*)(*pkt)); |
| 206 | } |
| 207 | |
| 208 | /* Create a reassociation request packet */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 209 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 210 | ieee80211softmac_reassoc_req(struct ieee80211_reassoc_request **pkt, |
| 211 | struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) |
| 212 | { |
| 213 | u8 *data; |
| 214 | (*pkt) = (struct ieee80211_reassoc_request *)ieee80211softmac_alloc_mgt( |
| 215 | 2 + /* Capability Info */ |
| 216 | 2 + /* Listen Interval */ |
| 217 | ETH_ALEN + /* AP MAC */ |
| 218 | /* SSID IE */ |
| 219 | 1 + 1 + IW_ESSID_MAX_SIZE + |
| 220 | /* Rates IE */ |
| 221 | 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN + |
| 222 | /* Extended Rates IE */ |
| 223 | 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN |
| 224 | /* Other IE's? */ |
| 225 | ); |
| 226 | if (unlikely((*pkt) == NULL)) |
| 227 | return 0; |
| 228 | ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_REASSOC_REQ, net->bssid, net->bssid); |
| 229 | |
| 230 | /* Fill in capability Info */ |
| 231 | (*pkt)->capability = mac->ieee->iw_mode == IW_MODE_MASTER ? |
| 232 | cpu_to_le16(WLAN_CAPABILITY_ESS) : |
| 233 | cpu_to_le16(WLAN_CAPABILITY_IBSS); |
| 234 | /* |
| 235 | (*pkt)->capability |= mac->ieee->short_slot ? |
| 236 | cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME) : 0; |
| 237 | */ |
| 238 | (*pkt)->capability |= mac->ieee->sec.level ? |
| 239 | cpu_to_le16(WLAN_CAPABILITY_PRIVACY) : 0; |
| 240 | |
| 241 | /* Fill in Listen Interval (?) */ |
| 242 | (*pkt)->listen_interval = cpu_to_le16(10); |
| 243 | /* Fill in the current AP MAC */ |
| 244 | memcpy((*pkt)->current_ap, mac->ieee->bssid, ETH_ALEN); |
| 245 | |
| 246 | data = (u8 *)(*pkt)->info_element; |
| 247 | /* Add SSID */ |
| 248 | data = ieee80211softmac_add_essid(data, &net->essid); |
| 249 | /* Add Rates */ |
| 250 | data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo); |
| 251 | /* Return packet size */ |
| 252 | return (data - (u8 *)(*pkt)); |
| 253 | } |
| 254 | |
| 255 | /* Create an authentication packet */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 256 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 257 | ieee80211softmac_auth(struct ieee80211_auth **pkt, |
| 258 | struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, |
| 259 | u16 transaction, u16 status) |
| 260 | { |
| 261 | u8 *data; |
| 262 | /* Allocate Packet */ |
| 263 | (*pkt) = (struct ieee80211_auth *)ieee80211softmac_alloc_mgt( |
| 264 | 2 + /* Auth Algorithm */ |
| 265 | 2 + /* Auth Transaction Seq */ |
| 266 | 2 + /* Status Code */ |
| 267 | /* Challenge Text IE */ |
| 268 | mac->ieee->open_wep ? 0 : |
| 269 | 1 + 1 + WLAN_AUTH_CHALLENGE_LEN |
| 270 | ); |
| 271 | if (unlikely((*pkt) == NULL)) |
| 272 | return 0; |
| 273 | ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_AUTH, net->bssid, net->bssid); |
| 274 | |
| 275 | /* Algorithm */ |
| 276 | (*pkt)->algorithm = mac->ieee->open_wep ? |
| 277 | cpu_to_le16(WLAN_AUTH_OPEN) : |
| 278 | cpu_to_le16(WLAN_AUTH_SHARED_KEY); |
| 279 | /* Transaction */ |
| 280 | (*pkt)->transaction = cpu_to_le16(transaction); |
| 281 | /* Status */ |
| 282 | (*pkt)->status = cpu_to_le16(status); |
| 283 | |
| 284 | data = (u8 *)(*pkt)->info_element; |
| 285 | /* Challenge Text */ |
| 286 | if(!mac->ieee->open_wep){ |
| 287 | *data = MFIE_TYPE_CHALLENGE; |
| 288 | data++; |
| 289 | |
| 290 | /* Copy the challenge in */ |
| 291 | // *data = challenge length |
| 292 | // data += sizeof(u16); |
| 293 | // memcpy(data, challenge, challenge length); |
| 294 | // data += challenge length; |
| 295 | |
| 296 | /* Add the full size to the packet length */ |
| 297 | } |
| 298 | |
| 299 | /* Return the packet size */ |
| 300 | return (data - (u8 *)(*pkt)); |
| 301 | } |
| 302 | |
| 303 | /* Create a disassocation or deauthentication packet */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 304 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 305 | ieee80211softmac_disassoc_deauth(struct ieee80211_disassoc **pkt, |
| 306 | struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, |
| 307 | u16 type, u16 reason) |
| 308 | { |
| 309 | /* Allocate Packet */ |
| 310 | (*pkt) = (struct ieee80211_disassoc *)ieee80211softmac_alloc_mgt(2); |
Johannes Berg | bba52d5 | 2006-01-11 11:01:22 +0100 | [diff] [blame] | 311 | if (unlikely((*pkt) == NULL)) |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 312 | return 0; |
| 313 | ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), type, net->bssid, net->bssid); |
| 314 | /* Reason */ |
| 315 | (*pkt)->reason = cpu_to_le16(reason); |
| 316 | /* Return the packet size */ |
| 317 | return (2 + IEEE80211_3ADDR_LEN); |
| 318 | } |
| 319 | |
| 320 | /* Create a probe request packet */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 321 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 322 | ieee80211softmac_probe_req(struct ieee80211_probe_request **pkt, |
| 323 | struct ieee80211softmac_device *mac, struct ieee80211softmac_essid *essid) |
| 324 | { |
| 325 | u8 *data; |
| 326 | /* Allocate Packet */ |
| 327 | (*pkt) = (struct ieee80211_probe_request *)ieee80211softmac_alloc_mgt( |
| 328 | /* SSID of requested network */ |
| 329 | 1 + 1 + IW_ESSID_MAX_SIZE + |
| 330 | /* Rates IE */ |
| 331 | 1 + 1 + IEEE80211SOFTMAC_MAX_RATES_LEN + |
| 332 | /* Extended Rates IE */ |
| 333 | 1 + 1 + IEEE80211SOFTMAC_MAX_EX_RATES_LEN |
| 334 | ); |
| 335 | if (unlikely((*pkt) == NULL)) |
| 336 | return 0; |
| 337 | ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_REQ, NULL, NULL); |
| 338 | |
| 339 | data = (u8 *)(*pkt)->info_element; |
| 340 | /* Add ESSID (can be NULL) */ |
| 341 | data = ieee80211softmac_add_essid(data, essid); |
| 342 | /* Add Rates */ |
| 343 | data = ieee80211softmac_frame_add_rates(data, &mac->ratesinfo); |
| 344 | /* Return packet size */ |
| 345 | return (data - (u8 *)(*pkt)); |
| 346 | } |
| 347 | |
| 348 | /* Create a probe response packet */ |
| 349 | /* FIXME: Not complete */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 350 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 351 | ieee80211softmac_probe_resp(struct ieee80211_probe_response **pkt, |
| 352 | struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net) |
| 353 | { |
| 354 | u8 *data; |
| 355 | /* Allocate Packet */ |
| 356 | (*pkt) = (struct ieee80211_probe_response *)ieee80211softmac_alloc_mgt( |
| 357 | 8 + /* Timestamp */ |
| 358 | 2 + /* Beacon Interval */ |
| 359 | 2 + /* Capability Info */ |
| 360 | /* SSID IE */ |
| 361 | 1 + 1 + IW_ESSID_MAX_SIZE + |
| 362 | 7 + /* FH Parameter Set */ |
| 363 | 2 + /* DS Parameter Set */ |
| 364 | 8 + /* CF Parameter Set */ |
| 365 | 4 /* IBSS Parameter Set */ |
| 366 | ); |
| 367 | if (unlikely((*pkt) == NULL)) |
| 368 | return 0; |
| 369 | ieee80211softmac_hdr_3addr(mac, &((*pkt)->header), IEEE80211_STYPE_PROBE_RESP, net->bssid, net->bssid); |
| 370 | data = (u8 *)(*pkt)->info_element; |
| 371 | |
| 372 | /* Return the packet size */ |
| 373 | return (data - (u8 *)(*pkt)); |
| 374 | } |
| 375 | |
| 376 | |
| 377 | /* Sends a manangement packet |
| 378 | * FIXME: document the use of the arg parameter |
| 379 | * for _AUTH: (transaction #) | (status << 16) |
| 380 | */ |
| 381 | int |
| 382 | ieee80211softmac_send_mgt_frame(struct ieee80211softmac_device *mac, |
| 383 | void *ptrarg, u32 type, u32 arg) |
| 384 | { |
| 385 | void *pkt = NULL; |
| 386 | u32 pkt_size = 0; |
| 387 | |
| 388 | switch(type) { |
| 389 | case IEEE80211_STYPE_ASSOC_REQ: |
| 390 | pkt_size = ieee80211softmac_assoc_req((struct ieee80211_assoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg); |
| 391 | break; |
| 392 | case IEEE80211_STYPE_REASSOC_REQ: |
| 393 | pkt_size = ieee80211softmac_reassoc_req((struct ieee80211_reassoc_request **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg); |
| 394 | break; |
| 395 | case IEEE80211_STYPE_AUTH: |
| 396 | pkt_size = ieee80211softmac_auth((struct ieee80211_auth **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, (u16)(arg & 0xFFFF), (u16) (arg >> 16)); |
| 397 | break; |
| 398 | case IEEE80211_STYPE_DISASSOC: |
| 399 | case IEEE80211_STYPE_DEAUTH: |
| 400 | pkt_size = ieee80211softmac_disassoc_deauth((struct ieee80211_disassoc **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg, type, (u16)(arg & 0xFFFF)); |
| 401 | break; |
| 402 | case IEEE80211_STYPE_PROBE_REQ: |
| 403 | pkt_size = ieee80211softmac_probe_req((struct ieee80211_probe_request **)(&pkt), mac, (struct ieee80211softmac_essid *)ptrarg); |
| 404 | break; |
| 405 | case IEEE80211_STYPE_PROBE_RESP: |
| 406 | pkt_size = ieee80211softmac_probe_resp((struct ieee80211_probe_response **)(&pkt), mac, (struct ieee80211softmac_network *)ptrarg); |
| 407 | break; |
| 408 | default: |
| 409 | printkl(KERN_DEBUG PFX "Unsupported Management Frame type: %i\n", type); |
| 410 | return -EINVAL; |
| 411 | }; |
| 412 | |
| 413 | if(pkt_size == 0 || pkt == NULL) { |
| 414 | printkl(KERN_DEBUG PFX "Error, packet is nonexistant or 0 length\n"); |
| 415 | return -ENOMEM; |
| 416 | } |
| 417 | |
| 418 | /* Send the packet to the ieee80211 layer for tx */ |
| 419 | /* we defined softmac->mgmt_xmit for this. Should we keep it |
| 420 | * as it is (that means we'd need to wrap this into a txb), |
| 421 | * modify the prototype (so it matches this function), |
| 422 | * or get rid of it alltogether? |
| 423 | * Does this work for you now? |
| 424 | */ |
| 425 | ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *)pkt, pkt_size); |
| 426 | |
| 427 | kfree(pkt); |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | |
| 432 | /* Create an rts/cts frame */ |
Johannes Berg | 714e1a5 | 2006-01-04 21:06:28 +0100 | [diff] [blame] | 433 | static u32 |
Johannes Berg | 370121e | 2006-01-04 16:32:16 +0100 | [diff] [blame] | 434 | ieee80211softmac_rts_cts(struct ieee80211_hdr_2addr **pkt, |
| 435 | struct ieee80211softmac_device *mac, struct ieee80211softmac_network *net, |
| 436 | u32 type) |
| 437 | { |
| 438 | /* Allocate Packet */ |
| 439 | (*pkt) = kmalloc(IEEE80211_2ADDR_LEN, GFP_ATOMIC); |
| 440 | memset(*pkt, 0, IEEE80211_2ADDR_LEN); |
| 441 | if((*pkt) == NULL) |
| 442 | return 0; |
| 443 | ieee80211softmac_hdr_2addr(mac, (*pkt), type, net->bssid); |
| 444 | return IEEE80211_2ADDR_LEN; |
| 445 | } |
| 446 | |
| 447 | |
| 448 | /* Sends a control packet */ |
| 449 | static int |
| 450 | ieee80211softmac_send_ctl_frame(struct ieee80211softmac_device *mac, |
| 451 | struct ieee80211softmac_network *net, u32 type, u32 arg) |
| 452 | { |
| 453 | void *pkt = NULL; |
| 454 | u32 pkt_size = 0; |
| 455 | |
| 456 | switch(type) { |
| 457 | case IEEE80211_STYPE_RTS: |
| 458 | case IEEE80211_STYPE_CTS: |
| 459 | pkt_size = ieee80211softmac_rts_cts((struct ieee80211_hdr_2addr **)(&pkt), mac, net, type); |
| 460 | break; |
| 461 | default: |
| 462 | printkl(KERN_DEBUG PFX "Unsupported Control Frame type: %i\n", type); |
| 463 | return -EINVAL; |
| 464 | } |
| 465 | |
| 466 | if(pkt_size == 0) |
| 467 | return -ENOMEM; |
| 468 | |
| 469 | /* Send the packet to the ieee80211 layer for tx */ |
| 470 | ieee80211_tx_frame(mac->ieee, (struct ieee80211_hdr *) pkt, pkt_size); |
| 471 | |
| 472 | kfree(pkt); |
| 473 | return 0; |
| 474 | } |