openwrt/package/openwrt/wlcompat.c

   1 /*
   2  * wlcompat.c
   3  *
   4  * Copyright (C) 2005 Mike Baker,
   5  *                    Felix Fietkau <nbd@vd-s.ath.cx>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  * $Id$
  22  */
  23
  24
  25 #include <linux/config.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/if_arp.h>
  29 #include <asm/uaccess.h>
  30 #include <linux/wireless.h>
  31
  32 #include <net/iw_handler.h>
  33 #include <wlioctl.h>
  34
  35 #define DEBUG
  36
  37 static struct net_device *dev;
  38 char buf[WLC_IOCTL_MAXLEN];
  39
  40 /* The frequency of each channel in MHz */
  41 const long channel_frequency[] = {
  42         2412, 2417, 2422, 2427, 2432, 2437, 2442,
  43         2447, 2452, 2457, 2462, 2467, 2472, 2484
  44 };
  45 #define NUM_CHANNELS ( sizeof(channel_frequency) / sizeof(channel_frequency[0]) )
  46
  47 static int wl_ioctl(struct net_device *dev, int cmd, void *buf, int len)
  48 {
  49         mm_segment_t old_fs = get_fs();
  50         struct ifreq ifr;
  51         int ret;
  52         wl_ioctl_t ioc;
  53         ioc.cmd = cmd;
  54         ioc.buf = buf;
  55         ioc.len = len;
  56         strncpy(ifr.ifr_name, dev->name, IFNAMSIZ);
  57         ifr.ifr_data = (caddr_t) &ioc;
  58         set_fs(KERNEL_DS);
  59         ret = dev->do_ioctl(dev,&ifr,SIOCDEVPRIVATE);
  60         set_fs (old_fs);
  61         return ret;
  62 }
  63
  64 static int wlcompat_ioctl_getiwrange(struct net_device *dev,
  65                                     char *extra)
  66 {
  67         int i, k;
  68         struct iw_range *range;
  69
  70         range = (struct iw_range *) extra;
  71
  72         range->we_version_compiled = WIRELESS_EXT;
  73         range->we_version_source = WIRELESS_EXT;
  74
  75         range->min_nwid = range->max_nwid = 0;
  76
  77         range->num_channels = NUM_CHANNELS;
  78         k = 0;
  79         for (i = 0; i < NUM_CHANNELS; i++) {
  80                 range->freq[k].i = i + 1;
  81                 range->freq[k].m = channel_frequency[i] * 100000;
  82                 range->freq[k].e = 1;
  83                 k++;
  84                 if (k >= IW_MAX_FREQUENCIES)
  85                         break;
  86         }
  87         range->num_frequency = k;
  88         range->sensitivity = 3;
  89
  90         /* nbd: don't know what this means, but other drivers set it this way */
  91         range->pmp_flags = IW_POWER_PERIOD;
  92         range->pmt_flags = IW_POWER_TIMEOUT;
  93         range->pm_capa = IW_POWER_PERIOD | IW_POWER_TIMEOUT | IW_POWER_UNICAST_R;
  94
  95         range->min_pmp = 0;
  96         range->max_pmp = 65535000;
  97         range->min_pmt = 0;
  98         range->max_pmt = 65535 * 1000;
  99
 100         range->min_rts = 0;
 101         if (wl_ioctl(dev, WLC_GET_RTS, &range->max_rts, sizeof(int)) < 0)
 102                 range->max_rts = 2347;
 103
 104         range->min_frag = 256;
 105
 106         if (wl_ioctl(dev, WLC_GET_FRAG, &range->max_frag, sizeof(int)) < 0)
 107                 range->max_frag = 2346;
 108
 109         range->txpower_capa = IW_TXPOW_MWATT;
 110
 111         return 0;
 112 }
 113
 114
 115 static int wlcompat_set_scan(struct net_device *dev,
 116                          struct iw_request_info *info,
 117                          union iwreq_data *wrqu,
 118                          char *extra)
 119 {
 120         int ap = 0, oldap = 0;
 121         wl_scan_params_t params;
 122
 123         memset(&params, 0, sizeof(params));
 124
 125         /* use defaults (same parameters as wl scan) */
 126         memset(&params.bssid, 0xff, sizeof(params.bssid));
 127         params.bss_type = DOT11_BSSTYPE_ANY;
 128         params.scan_type = -1;
 129         params.nprobes = -1;
 130         params.active_time = -1;
 131         params.passive_time = -1;
 132         params.home_time = -1;
 133
 134         /* can only scan in STA mode */
 135         wl_ioctl(dev, WLC_GET_AP, &oldap, sizeof(oldap));
 136         if (oldap > 0)
 137                 wl_ioctl(dev, WLC_SET_AP, &ap, sizeof(ap));
 138
 139         if (wl_ioctl(dev, WLC_SCAN, &params, 64) < 0)
 140                 return -EINVAL;
 141
 142         if (oldap > 0)
 143                 wl_ioctl(dev, WLC_SET_AP, &oldap, sizeof(oldap));
 144
 145         return 0;
 146 }
 147
 148
 149 static int wlcompat_get_scan(struct net_device *dev,
 150                          struct iw_request_info *info,
 151                          union iwreq_data *wrqu,
 152                          char *extra)
 153 {
 154         wl_scan_results_t *results = (wl_scan_results_t *) buf;
 155         wl_bss_info_t *bss_info;
 156         char *info_ptr;
 157         char *current_ev = extra;
 158         char *current_val;
 159         char *end_buf = extra + IW_SCAN_MAX_DATA;
 160         struct iw_event iwe;
 161         int i;
 162
 163         if (wl_ioctl(dev, WLC_SCAN_RESULTS, buf, WLC_IOCTL_MAXLEN) < 0)
 164                 return -EAGAIN;
 165
 166         bss_info = &(results->bss_info[0]);
 167         info_ptr = (char *) bss_info;
 168         for (i = 0; i < results->count; i++) {
 169
 170                 /* send the cell address (must be sent first) */
 171                 iwe.cmd = SIOCGIWAP;
 172                 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
 173                 memcpy(&iwe.u.ap_addr.sa_data, &bss_info->BSSID, sizeof(bss_info->BSSID));
 174                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, IW_EV_ADDR_LEN);
 175
 176                 /* send the ESSID */
 177                 iwe.cmd = SIOCGIWESSID;
 178                 iwe.u.data.length = bss_info->SSID_len;
 179                 if (iwe.u.data.length > IW_ESSID_MAX_SIZE)
 180                         iwe.u.data.length = IW_ESSID_MAX_SIZE;
 181                 iwe.u.data.flags = 1;
 182                 current_ev = iwe_stream_add_point(current_ev, end_buf, &iwe, bss_info->SSID);
 183
 184                 /* send frequency/channel info */
 185                 iwe.cmd = SIOCGIWFREQ;
 186                 iwe.u.freq.e = 0;
 187                 iwe.u.freq.m = bss_info->channel;
 188                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, IW_EV_FREQ_LEN);
 189
 190                 /* add quality statistics */
 191                 iwe.cmd = IWEVQUAL;
 192                 iwe.u.qual.level = bss_info->RSSI;
 193                 iwe.u.qual.noise = bss_info->phy_noise;
 194                 iwe.u.qual.qual = 0;
 195                 current_ev = iwe_stream_add_event(current_ev, end_buf, &iwe, IW_EV_QUAL_LEN);
 196
 197                 /* send rate information */
 198                 iwe.cmd = SIOCGIWRATE;
 199                 current_val = current_ev + IW_EV_LCP_LEN;
 200                 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
 201
 202                 for(i = 0 ; i < bss_info->rateset.count ; i++) {
 203                         iwe.u.bitrate.value = ((bss_info->rateset.rates[i] & 0x7f) * 500000);
 204                         current_val = iwe_stream_add_value(current_ev, current_val, end_buf, &iwe, IW_EV_PARAM_LEN);
 205                 }
 206                 if((current_val - current_ev) > IW_EV_LCP_LEN)
 207                         current_ev = current_val;
 208
 209                 info_ptr += sizeof(wl_bss_info_t);
 210                 if (bss_info->ie_length % 4)
 211                         info_ptr += bss_info->ie_length + 4 - (bss_info->ie_length % 4);
 212                 else
 213                         info_ptr += bss_info->ie_length;
 214                 bss_info = (wl_bss_info_t *) info_ptr;
 215         }
 216
 217         wrqu->data.length = (current_ev - extra);
 218         wrqu->data.flags = 0;
 219
 220         return 0;
 221 }
 222
 223 static int wlcompat_ioctl(struct net_device *dev,
 224                          struct iw_request_info *info,
 225                          union iwreq_data *wrqu,
 226                          char *extra)
 227 {
 228         switch (info->cmd) {
 229                 case SIOCGIWNAME:
 230                         strcpy(wrqu->name, "IEEE 802.11-DS");
 231                         break;
 232                 case SIOCGIWFREQ:
 233                 {
 234                         channel_info_t ci;
 235
 236                         if (wl_ioctl(dev,WLC_GET_CHANNEL, &ci, sizeof(ci)) < 0)
 237                                 return -EINVAL;
 238
 239                         wrqu->freq.m = ci.target_channel;
 240                         wrqu->freq.e = 0;
 241                         break;
 242                 }
 243                 case SIOCSIWFREQ:
 244                 {
 245                         if (wrqu->freq.e == 1) {
 246                                 int channel = 0;
 247                                 int f = wrqu->freq.m / 100000;
 248                                 while ((channel < NUM_CHANNELS + 1) && (f != channel_frequency[channel]))
 249                                         channel++;
 250
 251                                 if (channel == NUM_CHANNELS) // channel not found
 252                                         return -EINVAL;
 253
 254                                 wrqu->freq.e = 0;
 255                                 wrqu->freq.m = channel + 1;
 256                         }
 257                         if ((wrqu->freq.e == 0) && (wrqu->freq.m < 1000)) {
 258                                 if (wl_ioctl(dev, WLC_SET_CHANNEL, &wrqu->freq.m, sizeof(int)) < 0)
 259                                         return -EINVAL;
 260                         } else {
 261                                 return -EINVAL;
 262                         }
 263                         break;
 264                 }
 265                 case SIOCGIWAP:
 266                 {
 267                         wrqu->ap_addr.sa_family = ARPHRD_ETHER;
 268                         if (wl_ioctl(dev,WLC_GET_BSSID,wrqu->ap_addr.sa_data,6) < 0)
 269                                 return -EINVAL;
 270                         break;
 271                 }
 272                 case SIOCGIWESSID:
 273                 {
 274                         wlc_ssid_t ssid;
 275
 276                         if (wl_ioctl(dev,WLC_GET_SSID, &ssid, sizeof(wlc_ssid_t)) < 0)
 277                                 return -EINVAL;
 278
 279                         wrqu->essid.flags = wrqu->data.flags = 1;
 280                         wrqu->essid.length = wrqu->data.length = ssid.SSID_len + 1;
 281                         memcpy(extra,ssid.SSID,ssid.SSID_len + 1);
 282                         break;
 283                 }
 284                 case SIOCSIWESSID:
 285                 {
 286                         wlc_ssid_t ssid;
 287                         memset(&ssid, 0, sizeof(ssid));
 288                         ssid.SSID_len = strlen(extra);
 289                         if (ssid.SSID_len > WLC_ESSID_MAX_SIZE)
 290                                 ssid.SSID_len = WLC_ESSID_MAX_SIZE;
 291                         memcpy(ssid.SSID, extra, ssid.SSID_len);
 292                         if (wl_ioctl(dev, WLC_SET_SSID, &ssid, sizeof(ssid)) < 0)
 293                                 return -EINVAL;
 294                         break;
 295                 }
 296                 case SIOCGIWRTS:
 297                 {
 298                         if (wl_ioctl(dev,WLC_GET_RTS,&(wrqu->rts.value),sizeof(int)) < 0)
 299                                 return -EINVAL;
 300                         break;
 301                 }
 302                 case SIOCSIWRTS:
 303                 {
 304                         if (wl_ioctl(dev,WLC_SET_RTS,&(wrqu->rts.value),sizeof(int)) < 0)
 305                                 return -EINVAL;
 306                         break;
 307                 }
 308                 case SIOCGIWFRAG:
 309                 {
 310                         if (wl_ioctl(dev,WLC_GET_FRAG,&(wrqu->frag.value),sizeof(int)) < 0)
 311                                 return -EINVAL;
 312                         break;
 313                 }
 314                 case SIOCSIWFRAG:
 315                 {
 316                         if (wl_ioctl(dev,WLC_SET_FRAG,&(wrqu->frag.value),sizeof(int)) < 0)
 317                                 return -EINVAL;
 318                         break;
 319                 }
 320                 case SIOCGIWTXPOW:
 321                 {
 322                         wrqu->txpower.value = 0;
 323                         if (wl_ioctl(dev,WLC_GET_TXPWR, &(wrqu->txpower.value), sizeof(int)) < 0)
 324                                 return -EINVAL;
 325                         wrqu->txpower.fixed = 0;
 326                         wrqu->txpower.disabled = 0;
 327                         wrqu->txpower.flags = IW_TXPOW_MWATT;
 328                         break;
 329                 }
 330                 case SIOCSIWTXPOW:
 331                 {
 332                         if (wrqu->txpower.flags != IW_TXPOW_MWATT)
 333                                 return -EINVAL;
 334
 335                         if (wl_ioctl(dev, WLC_SET_TXPWR, &wrqu->txpower.value, sizeof(int)) < 0)
 336                                 return -EINVAL;
 337                 }
 338                 case SIOCGIWENCODE:
 339                 {
 340                         wrqu->data.flags = IW_ENCODE_DISABLED;
 341                         break;
 342                 }
 343                 case SIOCGIWRANGE:
 344                 {
 345                         return wlcompat_ioctl_getiwrange(dev, extra);
 346                         break;
 347                 }
 348                 case SIOCSIWMODE:
 349                 {
 350                         int ap = -1, infra = -1, passive = 0, wet = 0;
 351
 352                         switch (wrqu->mode) {
 353                                 case IW_MODE_MONITOR:
 354                                         passive = 1;
 355                                         break;
 356                                 case IW_MODE_ADHOC:
 357                                         infra = 0;
 358                                         ap = 0;
 359                                         break;
 360                                 case IW_MODE_MASTER:
 361                                         infra = 1;
 362                                         ap = 1;
 363                                         break;
 364                                 case IW_MODE_INFRA:
 365                                         infra = 1;
 366                                         ap = 0;
 367                                         break;
 368                                 case IW_MODE_REPEAT:
 369                                         infra = 1;
 370                                         ap = 0;
 371                                         wet = 1;
 372                                         break;
 373                                 default:
 374                                         return -EINVAL;
 375                         }
 376
 377                         if (wl_ioctl(dev, WLC_SET_PASSIVE, &passive, sizeof(passive)) < 0)
 378                                 return -EINVAL;
 379                         if (wl_ioctl(dev, WLC_SET_MONITOR, &passive, sizeof(passive)) < 0)
 380                                 return -EINVAL;
 381                         if (wl_ioctl(dev, WLC_SET_WET, &wet, sizeof(wet)) < 0)
 382                                 return -EINVAL;
 383                         if (ap >= 0)
 384                                 if (wl_ioctl(dev, WLC_SET_AP, &ap, sizeof(ap)) < 0)
 385                                         return -EINVAL;
 386                         if (infra >= 0)
 387                                 if (wl_ioctl(dev, WLC_SET_INFRA, &infra, sizeof(infra)) < 0)
 388                                         return -EINVAL;
 389
 390                         break;
 391
 392                 }
 393                 case SIOCGIWMODE:
 394                 {
 395                         int ap, infra, wet, passive;
 396
 397                         if (wl_ioctl(dev, WLC_GET_AP, &ap, sizeof(ap)) < 0)
 398                                 return -EINVAL;
 399                         if (wl_ioctl(dev, WLC_GET_INFRA, &infra, sizeof(infra)) < 0)
 400                                 return -EINVAL;
 401                         if (wl_ioctl(dev, WLC_GET_PASSIVE, &passive, sizeof(passive)) < 0)
 402                                 return -EINVAL;
 403                         if (wl_ioctl(dev, WLC_GET_WET, &wet, sizeof(wet)) < 0)
 404                                 return -EINVAL;
 405
 406                         if (passive) {
 407                                 wrqu->mode = IW_MODE_MONITOR;
 408                         } else if (!infra) {
 409                                 wrqu->mode = IW_MODE_ADHOC;
 410                         } else {
 411                                 if (ap) {
 412                                         wrqu->mode = IW_MODE_MASTER;
 413                                 } else {
 414                                         if (wet) {
 415                                                 wrqu->mode = IW_MODE_REPEAT;
 416                                         } else {
 417                                                 wrqu->mode = IW_MODE_INFRA;
 418                                         }
 419                                 }
 420                         }
 421                         break;
 422                 }
 423                 default:
 424                 {
 425                         return -EINVAL;
 426                 }
 427         }
 428
 429         return 0;
 430 }
 431
 432 static const iw_handler  wlcompat_handler[] = {
 433         NULL,                   /* SIOCSIWCOMMIT */
 434         wlcompat_ioctl,         /* SIOCGIWNAME */
 435         NULL,                   /* SIOCSIWNWID */
 436         NULL,                   /* SIOCGIWNWID */
 437         wlcompat_ioctl,         /* SIOCSIWFREQ */
 438         wlcompat_ioctl,         /* SIOCGIWFREQ */
 439         wlcompat_ioctl,         /* SIOCSIWMODE */
 440         wlcompat_ioctl,         /* SIOCGIWMODE */
 441         NULL,                   /* SIOCSIWSENS */
 442         NULL,                   /* SIOCGIWSENS */
 443         NULL,                   /* SIOCSIWRANGE, unused */
 444         wlcompat_ioctl,         /* SIOCGIWRANGE */
 445         NULL,                   /* SIOCSIWPRIV */
 446         NULL,                   /* SIOCGIWPRIV */
 447         NULL,                   /* SIOCSIWSTATS */
 448         NULL,                   /* SIOCGIWSTATS */
 449         iw_handler_set_spy,     /* SIOCSIWSPY */
 450         iw_handler_get_spy,     /* SIOCGIWSPY */
 451         iw_handler_set_thrspy,  /* SIOCSIWTHRSPY */
 452         iw_handler_get_thrspy,  /* SIOCGIWTHRSPY */
 453         NULL,                   /* SIOCSIWAP */
 454         wlcompat_ioctl,         /* SIOCGIWAP */
 455         NULL,                   /* -- hole -- */
 456         NULL,                   /* SIOCGIWAPLIST */
 457         wlcompat_set_scan,      /* SIOCSIWSCAN */
 458         wlcompat_get_scan,      /* SIOCGIWSCAN */
 459         wlcompat_ioctl,         /* SIOCSIWESSID */
 460         wlcompat_ioctl,         /* SIOCGIWESSID */
 461         NULL,                   /* SIOCSIWNICKN */
 462         NULL,                   /* SIOCGIWNICKN */
 463         NULL,                   /* -- hole -- */
 464         NULL,                   /* -- hole -- */
 465         NULL,                   /* SIOCSIWRATE */
 466         NULL,                   /* SIOCGIWRATE */
 467         wlcompat_ioctl,         /* SIOCSIWRTS */
 468         wlcompat_ioctl,         /* SIOCGIWRTS */
 469         wlcompat_ioctl,         /* SIOCSIWFRAG */
 470         wlcompat_ioctl,         /* SIOCGIWFRAG */
 471         wlcompat_ioctl,         /* SIOCSIWTXPOW */
 472         wlcompat_ioctl,         /* SIOCGIWTXPOW */
 473         NULL,                   /* SIOCSIWRETRY */
 474         NULL,                   /* SIOCGIWRETRY */
 475         NULL,                   /* SIOCSIWENCODE */
 476         wlcompat_ioctl,         /* SIOCGIWENCODE */
 477 };
 478
 479 static const struct iw_handler_def      wlcompat_handler_def =
 480 {
 481         .standard       = (iw_handler *) wlcompat_handler,
 482         .num_standard   = sizeof(wlcompat_handler)/sizeof(iw_handler),
 483         .private        = NULL,
 484         .num_private    = 0,
 485         .private_args   = NULL,
 486         .num_private_args = 0,
 487 };
 488
 489 #ifdef DEBUG
 490 static int (*old_ioctl)(struct net_device *dev, struct ifreq *ifr, int cmd);
 491 static int new_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) {
 492         int ret = old_ioctl(dev,ifr,cmd);
 493         printk("dev: %s ioctl: 0x%04x\n",dev->name,cmd);
 494         if (cmd==SIOCDEVPRIVATE) {
 495                 int x;
 496                 wl_ioctl_t *ioc = (wl_ioctl_t *)ifr->ifr_data;
 497                 unsigned char *buf = ioc->buf;
 498                 printk("   cmd: %d buf: 0x%08x len: %d\n",ioc->cmd,&(ioc->buf),ioc->len);
 499                 printk("   ->");
 500                 for (x=0;x<ioc->len && x<128 ;x++) {
 501                         printk("%02X",buf[x]);
 502                 }
 503                 printk("\n");
 504         }
 505         return ret;
 506 }
 507 #endif
 508
 509 static int __init wlcompat_init()
 510 {
 511         dev = dev_get_by_name("eth1");
 512 #ifdef DEBUG
 513         old_ioctl = dev->do_ioctl;
 514         dev->do_ioctl = new_ioctl;
 515 #endif
 516         dev->wireless_handlers = (struct iw_handler_def *)&wlcompat_handler_def;
 517         return 0;
 518 }
 519
 520 static void __exit wlcompat_exit()
 521 {
 522         dev->wireless_handlers = NULL;
 523 #ifdef DEBUG
 524         dev->do_ioctl = old_ioctl;
 525 #endif
 526         return;
 527 }
 528
 529 EXPORT_NO_SYMBOLS;
 530 MODULE_AUTHOR("openwrt.org");
 531 MODULE_LICENSE("GPL");
 532
 533 module_init(wlcompat_init);
 534 module_exit(wlcompat_exit);