openwrt/package/wificonf/wificonf.c

   1 /*
   2  * Wireless Network Adapter configuration utility
   3  *
   4  * Copyright (C) 2005 Felix Fietkau <nbd@vd-s.ath.cx>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <stdio.h>
  18 #include <unistd.h>
  19 #include <iwlib.h>
  20 #include <bcmnvram.h>
  21 #include <shutils.h>
  22 #include <wlioctl.h>
  23
  24 /*------------------------------------------------------------------*/
  25 /*
  26  * Macro to handle errors when setting WE
  27  * Print a nice error message and exit...
  28  * We define them as macro so that "return" do the right thing.
  29  * The "do {...} while(0)" is a standard trick
  30  */
  31 #define ERR_SET_EXT(rname, request) \
  32         fprintf(stderr, "Error for wireless request \"%s\" (%X) :\n", \
  33                 rname, request)
  34
  35 #define ABORT_ARG_NUM(rname, request) \
  36         do { \
  37                 ERR_SET_EXT(rname, request); \
  38                 fprintf(stderr, "    too few arguments.\n"); \
  39                 return; \
  40         } while(0)
  41
  42 #define ABORT_ARG_TYPE(rname, request, arg) \
  43         do { \
  44                 ERR_SET_EXT(rname, request); \
  45                 fprintf(stderr, "    invalid argument \"%s\".\n", arg); \
  46                 return; \
  47         } while(0)
  48
  49 #define ABORT_ARG_SIZE(rname, request, max) \
  50         do { \
  51                 ERR_SET_EXT(rname, request); \
  52                 fprintf(stderr, "    argument too big (max %d)\n", max); \
  53                 return; \
  54         } while(0)
  55
  56 /*------------------------------------------------------------------*/
  57 /*
  58  * Wrapper to push some Wireless Parameter in the driver
  59  * Use standard wrapper and add pretty error message if fail...
  60  */
  61 #define IW_SET_EXT_ERR(skfd, ifname, request, wrq, rname) \
  62         do { \
  63         if(iw_set_ext(skfd, ifname, request, wrq) < 0) { \
  64                 ERR_SET_EXT(rname, request); \
  65                 fprintf(stderr, "    SET failed on device %-1.16s ; %s.\n", \
  66                         ifname, strerror(errno)); \
  67                 return; \
  68         } } while(0)
  69
  70 /*------------------------------------------------------------------*/
  71 /*
  72  * Wrapper to extract some Wireless Parameter out of the driver
  73  * Use standard wrapper and add pretty error message if fail...
  74  */
  75 #define IW_GET_EXT_ERR(skfd, ifname, request, wrq, rname) \
  76         do { \
  77         if(iw_get_ext(skfd, ifname, request, wrq) < 0) { \
  78                 ERR_SET_EXT(rname, request); \
  79                 fprintf(stderr, "    GET failed on device %-1.16s ; %s.\n", \
  80                         ifname, strerror(errno)); \
  81                 return; \
  82         } } while(0)
  83
  84 char *prefix;
  85 char buffer[128];
  86
  87 char *wl_var(char *name)
  88 {
  89         strcpy(buffer, prefix);
  90         strcat(buffer, name);
  91 }
  92
  93 int nvram_enabled(char *name)
  94 {
  95         return (nvram_match(name, "1") || nvram_match(name, "on") || nvram_match(name, "enabled") || nvram_match(name, "true") || nvram_match(name, "yes") ? 1 : 0);
  96 }
  97
  98 int nvram_disabled(char *name)
  99 {
 100         return (nvram_match(name, "0") || nvram_match(name, "off") || nvram_match(name, "disabled") || nvram_match(name, "false") || nvram_match(name, "no") ? 1 : 0);
 101 }
 102
 103
 104 int bcom_ioctl(int skfd, char *ifname, int cmd, void *buf, int len)
 105 {
 106         struct ifreq ifr;
 107         wl_ioctl_t ioc;
 108         int ret;
 109
 110         ioc.cmd = cmd;
 111         ioc.buf = buf;
 112         ioc.len = len;
 113
 114         ifr.ifr_data = (caddr_t) &ioc;
 115         strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
 116
 117         ret = ioctl(skfd, SIOCDEVPRIVATE, &ifr);
 118         if (ret < 0)
 119                 fprintf(stderr, "bcom_ioctl [cmd=%d, buf=%08x, len=%d] failed: %d\n", cmd, buf, len, ret);
 120
 121         return ret;
 122 }
 123
 124 int bcom_set_val(int skfd, char *ifname, char *var, void *val, int len)
 125 {
 126         char buf[8192];
 127         int ret;
 128
 129         if (strlen(var) + 1 > sizeof(buf) || len > sizeof(buf))
 130                 return -1;
 131
 132         strcpy(buf, var);
 133
 134         if ((ret = bcom_ioctl(skfd, ifname, WLC_GET_VAR, buf, sizeof(buf))))
 135                 return ret;
 136
 137         memcpy(val, buf, len);
 138         return 0;
 139 }
 140
 141 int bcom_set_int(int skfd, char *ifname, char *var, int val)
 142 {
 143         return bcom_set_val(skfd, ifname, var, &val, sizeof(val));
 144 }
 145
 146 void setup_bcom(int skfd, char *ifname)
 147 {
 148         int val = 0;
 149         char *v;
 150
 151         if (bcom_ioctl(skfd, ifname, WLC_GET_MAGIC, &val, sizeof(val)) < 0)
 152                 return;
 153
 154         bcom_ioctl(skfd, ifname, WLC_DOWN, NULL, 0);
 155
 156         /* Set up WPA */
 157         if (nvram_match(wl_var("crypto"), "tkip"))
 158                 val = TKIP_ENABLED;
 159         else if (nvram_match(wl_var("crypto"), "aes"))
 160                 val = AES_ENABLED;
 161         else if (nvram_match(wl_var("crypto"), "tkip+aes"))
 162                 val = TKIP_ENABLED | AES_ENABLED;
 163         else
 164                 val = 0;
 165         bcom_ioctl(skfd, ifname, WLC_SET_WSEC, &val, sizeof(val));
 166
 167         if (val && nvram_get(wl_var("wpa_psk"))) {
 168                 val = 1;
 169                 bcom_ioctl(skfd, ifname, WLC_SET_EAP_RESTRICT, &val, sizeof(val));
 170         }
 171
 172         /* Set up afterburner */
 173         val = ABO_AUTO;
 174         if (nvram_enabled(wl_var("afterburner")))
 175                 val = ABO_ON;
 176         if (nvram_disabled(wl_var("afterburner")))
 177                 val = ABO_OFF;
 178         bcom_set_val(skfd, ifname, "afterburner_override", &val, sizeof(val));
 179
 180         /* Set other options */
 181         if (v = nvram_get(wl_var("lazywds"))) {
 182                 val = atoi(v);
 183                 bcom_ioctl(skfd, ifname, WLC_SET_LAZYWDS, &val, sizeof(val));
 184         }
 185         if (v = nvram_get(wl_var("frag"))) {
 186                 val = atoi(v);
 187                 bcom_ioctl(skfd, ifname, WLC_SET_FRAG, &val, sizeof(val));
 188         }
 189         if (v = nvram_get(wl_var("dtim"))) {
 190                 val = atoi(v);
 191                 bcom_ioctl(skfd, ifname, WLC_SET_DTIMPRD, &val, sizeof(val));
 192         }
 193         if (v = nvram_get(wl_var("bcn"))) {
 194                 val = atoi(v);
 195                 bcom_ioctl(skfd, ifname, WLC_SET_BCNPRD, &val, sizeof(val));
 196         }
 197         if (v = nvram_get(wl_var("rts"))) {
 198                 val = atoi(v);
 199                 bcom_ioctl(skfd, ifname, WLC_SET_RTS, &val, sizeof(val));
 200         }
 201         if (v = nvram_get(wl_var("antdiv"))) {
 202                 val = atoi(v);
 203                 bcom_ioctl(skfd, ifname, WLC_SET_ANTDIV, &val, sizeof(val));
 204         }
 205         if (v = nvram_get(wl_var("txant"))) {
 206                 val = atoi(v);
 207                 bcom_ioctl(skfd, ifname, WLC_SET_TXANT, &val, sizeof(val));
 208         }
 209
 210         val = nvram_enabled(wl_var("closed"));
 211         bcom_ioctl(skfd, ifname, WLC_SET_CLOSED, &val, sizeof(val));
 212
 213         val = nvram_enabled(wl_var("ap_isolate"));
 214         bcom_set_int(skfd, ifname, "ap_isolate", val);
 215
 216         val = nvram_enabled(wl_var("frameburst"));
 217         bcom_ioctl(skfd, ifname, WLC_SET_FAKEFRAG, &val, sizeof(val));
 218
 219         /* Set up MAC list */
 220         if (nvram_match(wl_var("macmode"), "allow"))
 221                 val = WLC_MACMODE_ALLOW;
 222         else if (nvram_match(wl_var("macmode"), "deny"))
 223                 val = WLC_MACMODE_DENY;
 224         else
 225                 val = WLC_MACMODE_DISABLED;
 226
 227         if ((val != WLC_MACMODE_DISABLED) && (v = nvram_get(wl_var("maclist")))) {
 228                 char buf[8192];
 229                 char wbuf[80];
 230                 struct maclist *mac_list;
 231                 struct ether_addr *addr;
 232                 char *next;
 233
 234                 memset(buf, 0, 8192);
 235                 mac_list = (struct maclist *) buf;
 236                 addr = mac_list->ea;
 237
 238                 foreach(wbuf, nvram_safe_get(wl_var("maclist")), next) {
 239                         if (ether_atoe(wbuf, addr->ether_addr_octet)) {
 240                                 mac_list->count++;
 241                                 addr++;
 242                         }
 243                 }
 244                 bcom_ioctl(skfd, ifname, WLC_SET_MACLIST, buf, sizeof(buf));
 245         } else {
 246                 val = WLC_MACMODE_DISABLED;
 247         }
 248         bcom_ioctl(skfd, ifname, WLC_SET_MACMODE, &val, sizeof(val));
 249
 250         /* Set up G mode */
 251         bcom_ioctl(skfd, ifname, WLC_GET_PHYTYPE, &val, sizeof(val));
 252         if (val == 2) {
 253                 int override = WLC_G_PROTECTION_OFF;
 254                 int control = WLC_G_PROTECTION_CTL_OFF;
 255
 256                 val = atoi(nvram_safe_get(wl_var("gmode")));
 257                 if (val > 5)
 258                         val = 1;
 259                 bcom_ioctl(skfd, ifname, WLC_SET_GMODE, &val, sizeof(val));
 260
 261                 if (nvram_match(wl_var("gmode_protection"), "auto")) {
 262                         override = WLC_G_PROTECTION_AUTO;
 263                         control = WLC_G_PROTECTION_CTL_OVERLAP;
 264                 }
 265                 if (nvram_enabled(wl_var("gmode_protection"))) {
 266                         override = WLC_G_PROTECTION_ON;
 267                         control = WLC_G_PROTECTION_CTL_OVERLAP;
 268                 }
 269                 bcom_ioctl(skfd, ifname, WLC_SET_GMODE_PROTECTION_CONTROL, &override, sizeof(control));
 270                 bcom_ioctl(skfd, ifname, WLC_SET_GMODE_PROTECTION_OVERRIDE, &override, sizeof(override));
 271         }
 272 }
 273
 274 void set_wext_ssid(int skfd, char *ifname)
 275 {
 276         char *buffer;
 277         struct iwreq wrq;
 278
 279         if (buffer = nvram_get(wl_var("ssid"))) {
 280                 if (strlen(buffer) > IW_ESSID_MAX_SIZE) {
 281                         ABORT_ARG_SIZE("Set ESSID", SIOCSIWESSID, IW_ESSID_MAX_SIZE);
 282                 } else {
 283                         char essid[IW_ESSID_MAX_SIZE + 1];
 284
 285                         wrq.u.essid.flags = 1;
 286                         strcpy(essid, buffer);
 287                         wrq.u.essid.pointer = (caddr_t) essid;
 288                         wrq.u.essid.length = strlen(essid) + 1;
 289                         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWESSID, &wrq, "Set ESSID");
 290                 }
 291         }
 292 }
 293
 294 void start_bcom(int skfd, char *ifname)
 295 {
 296         int val = 0;
 297
 298         if (bcom_ioctl(skfd, ifname, WLC_GET_MAGIC, &val, sizeof(val)) < 0)
 299                 return;
 300
 301         bcom_ioctl(skfd, ifname, WLC_UP, &val, sizeof(val));
 302
 303         /* Need to re-set SSID after WLC_UP */
 304         set_wext_ssid(skfd, ifname);
 305 }
 306
 307 void setup_wext_wep(int skfd, char *ifname)
 308 {
 309         int i, keylen;
 310         struct iwreq wrq;
 311         char keystr[5];
 312         char *keyval;
 313         unsigned char key[IW_ENCODING_TOKEN_MAX];
 314
 315         strcpy(keystr, "key1");
 316         for (i = 1; i <= 4; i++) {
 317                 if (keyval = nvram_get(wl_var(keystr))) {
 318                         keylen = iw_in_key(keyval, key);
 319
 320                         if (keylen > 0) {
 321                                 wrq.u.data.length = keylen;
 322                                 wrq.u.data.pointer = (caddr_t) key;
 323                                 wrq.u.data.flags = i;
 324                                 IW_SET_EXT_ERR(skfd, ifname, SIOCSIWENCODE, &wrq, "Set Encode");
 325                         }
 326                 }
 327                 keystr[3]++;
 328         }
 329
 330
 331         i = atoi(nvram_safe_get(wl_var("key")));
 332         if (i > 0 && i < 4) {
 333                 wrq.u.data.flags = i | IW_ENCODE_RESTRICTED;
 334                 IW_SET_EXT_ERR(skfd, ifname, SIOCSIWENCODE, &wrq, "Set Encode");
 335         }
 336 }
 337
 338 void setup_wext(int skfd, char *ifname)
 339 {
 340         char *buffer;
 341         struct iwreq wrq;
 342
 343         /* Set ESSID */
 344         set_wext_ssid(skfd, ifname);
 345
 346         /* Set channel */
 347         int channel = atoi(nvram_safe_get(wl_var("channel")));
 348
 349         wrq.u.freq.m = -1;
 350         wrq.u.freq.e = 0;
 351         wrq.u.freq.flags = 0;
 352
 353         if (channel > 0) {
 354                 wrq.u.freq.flags = IW_FREQ_FIXED;
 355                 wrq.u.freq.m = channel;
 356                 IW_SET_EXT_ERR(skfd, ifname, SIOCSIWFREQ, &wrq, "Set Frequency");
 357         }
 358
 359         /* Set operation mode */
 360         int ap = 0, infra = 0, wet = 0;
 361
 362         ap = !nvram_match(wl_var("mode"), "sta");
 363         infra = !nvram_disabled(wl_var("infra"));
 364         wet = nvram_enabled(wl_var("wet"));
 365
 366         wrq.u.mode = (!infra ? IW_MODE_ADHOC : (ap ? IW_MODE_MASTER : (wet ? IW_MODE_REPEAT : IW_MODE_INFRA)));
 367         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWMODE, &wrq, "Set Mode");
 368
 369         /* Disable radio if wlX_radio is set and not enabled */
 370         wrq.u.txpower.disabled = nvram_disabled(wl_var("radio"));
 371
 372         wrq.u.txpower.value = -1;
 373         wrq.u.txpower.fixed = 1;
 374         wrq.u.txpower.flags = IW_TXPOW_MWATT;
 375         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWTXPOW, &wrq, "Set Tx Power");
 376
 377         /* Set up WEP */
 378         if (nvram_enabled(wl_var("wep")))
 379                 setup_wext_wep(skfd, ifname);
 380
 381 }
 382
 383
 384 static int setup_interfaces(int skfd, char *ifname, char *args[], int count)
 385 {
 386         struct iwreq wrq;
 387         int rc;
 388
 389         /* Avoid "Unused parameter" warning */
 390         args = args; count = count;
 391
 392         if(iw_get_ext(skfd, ifname, SIOCGIWNAME, &wrq) < 0)
 393                 return 0;
 394
 395         setup_bcom(skfd, ifname);
 396         setup_wext(skfd, ifname);
 397         start_bcom(skfd, ifname);
 398         prefix[2]++;
 399 }
 400
 401 int main(int argc, char **argv)
 402 {
 403         int skfd;
 404         if((skfd = iw_sockets_open()) < 0) {
 405                 perror("socket");
 406                 exit(-1);
 407         }
 408
 409         prefix = strdup("wl0_");
 410         iw_enum_devices(skfd, &setup_interfaces, NULL, 0);
 411
 412         return 0;
 413 }