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") ? 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") ? 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         val = atoi(nvram_safe_get(wl_var("lazywds")));
 182         bcom_ioctl(skfd, ifname, WLC_SET_LAZYWDS, &val, sizeof(val));
 183         val = atoi(nvram_safe_get(wl_var("frag")));
 184         bcom_ioctl(skfd, ifname, WLC_SET_FRAG, &val, sizeof(val));
 185         val = atoi(nvram_safe_get(wl_var("dtim")));
 186         bcom_ioctl(skfd, ifname, WLC_SET_DTIMPRD, &val, sizeof(val));
 187         val = atoi(nvram_safe_get(wl_var("bcn")));
 188         bcom_ioctl(skfd, ifname, WLC_SET_BCNPRD, &val, sizeof(val));
 189         val = atoi(nvram_safe_get(wl_var("rts")));
 190         bcom_ioctl(skfd, ifname, WLC_SET_RTS, &val, sizeof(val));
 191         val = atoi(nvram_safe_get(wl_var("antdiv")));
 192         bcom_ioctl(skfd, ifname, WLC_SET_ANTDIV, &val, sizeof(val));
 193         val = atoi(nvram_safe_get(wl_var("txant")));
 194         bcom_ioctl(skfd, ifname, WLC_SET_TXANT, &val, sizeof(val));
 195
 196         val = nvram_enabled(wl_var("ap_isolate"));
 197         bcom_set_int(skfd, ifname, "ap_isolate", val);
 198         val = nvram_enabled(wl_var("frameburst"));
 199         bcom_ioctl(skfd, ifname, WLC_SET_FAKEFRAG, &val, sizeof(val));
 200
 201         /* Set up MAC list */
 202         if (nvram_match(wl_var("macmode"), "allow"))
 203                 val = WLC_MACMODE_ALLOW;
 204         else if (nvram_match(wl_var("macmode"), "deny"))
 205                 val = WLC_MACMODE_DENY;
 206         else
 207                 val = WLC_MACMODE_DISABLED;
 208
 209         if ((val != WLC_MACMODE_DISABLED) && (v = nvram_get(wl_var("maclist")))) {
 210                 char buf[8192];
 211                 struct maclist *mac_list;
 212                 struct ether_addr *addr;
 213                 char *next;
 214
 215                 memset(buf, 0, 8192);
 216                 mac_list = (struct maclist *) buf;
 217                 addr = mac_list->ea;
 218
 219                 foreach(v, nvram_safe_get(wl_var("maclist")), next) {
 220                         if (ether_atoe(v, addr->ether_addr_octet)) {
 221                                 mac_list->count++;
 222                                 addr++;
 223                         }
 224                 }
 225                 bcom_ioctl(skfd, ifname, WLC_SET_MACLIST, buf, sizeof(buf));
 226         } else {
 227                 val = WLC_MACMODE_DISABLED;
 228         }
 229         bcom_ioctl(skfd, ifname, WLC_SET_MACMODE, &val, sizeof(val));
 230
 231         /* Set up G mode */
 232         bcom_ioctl(skfd, ifname, WLC_GET_PHYTYPE, &val, sizeof(val));
 233         if (val == 2) {
 234                 int override = WLC_G_PROTECTION_OFF;
 235                 int control = WLC_G_PROTECTION_CTL_OFF;
 236
 237                 val = atoi(nvram_safe_get(wl_var("gmode")));
 238                 if (val > 5)
 239                         val = 1;
 240                 bcom_ioctl(skfd, ifname, WLC_SET_GMODE, &val, sizeof(val));
 241
 242                 if (nvram_match(wl_var("gmode_protection"), "auto")) {
 243                         override = WLC_G_PROTECTION_AUTO;
 244                         control = WLC_G_PROTECTION_CTL_OVERLAP;
 245                 }
 246                 if (nvram_enabled(wl_var("gmode_protection"))) {
 247                         override = WLC_G_PROTECTION_ON;
 248                         control = WLC_G_PROTECTION_CTL_OVERLAP;
 249                 }
 250                 bcom_ioctl(skfd, ifname, WLC_SET_GMODE_PROTECTION_CONTROL, &override, sizeof(control));
 251                 bcom_ioctl(skfd, ifname, WLC_SET_GMODE_PROTECTION_OVERRIDE, &override, sizeof(override));
 252         }
 253 }
 254
 255 void set_wext_ssid(int skfd, char *ifname)
 256 {
 257         char *buffer;
 258         struct iwreq wrq;
 259
 260         if (buffer = nvram_get(wl_var("ssid"))) {
 261                 if (strlen(buffer) > IW_ESSID_MAX_SIZE) {
 262                         ABORT_ARG_SIZE("Set ESSID", SIOCSIWESSID, IW_ESSID_MAX_SIZE);
 263                 } else {
 264                         char essid[IW_ESSID_MAX_SIZE + 1];
 265
 266                         wrq.u.essid.flags = 1;
 267                         strcpy(essid, buffer);
 268                         wrq.u.essid.pointer = (caddr_t) essid;
 269                         wrq.u.essid.length = strlen(essid) + 1;
 270                         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWESSID, &wrq, "Set ESSID");
 271                 }
 272         }
 273 }
 274
 275 void start_bcom(int skfd, char *ifname)
 276 {
 277         int val = 0;
 278
 279         if (bcom_ioctl(skfd, ifname, WLC_GET_MAGIC, &val, sizeof(val)) < 0)
 280                 return;
 281
 282         bcom_ioctl(skfd, ifname, WLC_UP, &val, sizeof(val));
 283
 284         /* Need to re-set SSID after WLC_UP */
 285         set_wext_ssid(skfd, ifname);
 286 }
 287
 288 void setup_wext_wep(int skfd, char *ifname)
 289 {
 290         int i, keylen;
 291         struct iwreq wrq;
 292         char keystr[5];
 293         char *keyval;
 294         unsigned char key[IW_ENCODING_TOKEN_MAX];
 295
 296         strcpy(keystr, "key1");
 297         for (i = 1; i <= 4; i++) {
 298                 if (keyval = nvram_get(wl_var(keystr))) {
 299                         keylen = iw_in_key(keyval, key);
 300
 301                         if (keylen > 0) {
 302                                 wrq.u.data.length = keylen;
 303                                 wrq.u.data.pointer = (caddr_t) key;
 304                                 wrq.u.data.flags = i;
 305                                 IW_SET_EXT_ERR(skfd, ifname, SIOCSIWENCODE, &wrq, "Set Encode");
 306                         }
 307                 }
 308                 keystr[3]++;
 309         }
 310
 311
 312         i = atoi(nvram_safe_get(wl_var("key")));
 313         if (i > 0 && i < 4) {
 314                 wrq.u.data.flags = i | IW_ENCODE_RESTRICTED;
 315                 IW_SET_EXT_ERR(skfd, ifname, SIOCSIWENCODE, &wrq, "Set Encode");
 316         }
 317 }
 318
 319 void setup_wext(int skfd, char *ifname)
 320 {
 321         char *buffer;
 322         struct iwreq wrq;
 323
 324         /* Set ESSID */
 325         set_wext_ssid(skfd, ifname);
 326
 327         /* Set channel */
 328         int channel = atoi(nvram_safe_get(wl_var("channel")));
 329
 330         wrq.u.freq.m = -1;
 331         wrq.u.freq.e = 0;
 332         wrq.u.freq.flags = 0;
 333
 334         if (channel > 0) {
 335                 wrq.u.freq.flags = IW_FREQ_FIXED;
 336                 wrq.u.freq.m = channel;
 337         }
 338         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWFREQ, &wrq, "Set Frequency");
 339
 340         /* Set operation mode */
 341         int ap = 0, infra = 0, wet = 0;
 342
 343         ap = (nvram_match(wl_var("mode"), "ap") || nvram_match(wl_var("mode"), "wds"));
 344         infra = nvram_enabled(wl_var("infra"));
 345         wet = nvram_enabled(wl_var("wet"));
 346
 347         wrq.u.mode = (!infra ? IW_MODE_ADHOC : (ap ? IW_MODE_MASTER : (wet ? IW_MODE_REPEAT : IW_MODE_INFRA)));
 348         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWMODE, &wrq, "Set Mode");
 349
 350         /* Disable radio if wlX_radio is set and not enabled */
 351         if (nvram_disabled(wl_var("radio")))
 352                 wrq.u.txpower.disabled = 1;
 353         else
 354                 wrq.u.txpower.disabled = 0;
 355
 356         wrq.u.txpower.value = -1;
 357         wrq.u.txpower.fixed = 1;
 358         wrq.u.txpower.flags = IW_TXPOW_MWATT;
 359         IW_SET_EXT_ERR(skfd, ifname, SIOCSIWTXPOW, &wrq, "Set Tx Power");
 360
 361         /* Set up WEP */
 362         if (nvram_enabled(wl_var("wep")))
 363                 setup_wext_wep(skfd, ifname);
 364
 365 }
 366
 367
 368 static int setup_interfaces(int skfd, char *ifname, char *args[], int count)
 369 {
 370         struct iwreq wrq;
 371         int rc;
 372
 373         /* Avoid "Unused parameter" warning */
 374         args = args; count = count;
 375
 376         if(iw_get_ext(skfd, ifname, SIOCGIWNAME, &wrq) < 0)
 377                 return 0;
 378
 379         setup_bcom(skfd, ifname);
 380         setup_wext(skfd, ifname);
 381         start_bcom(skfd, ifname);
 382         prefix[2]++;
 383 }
 384
 385 int main(int argc, char **argv)
 386 {
 387         int skfd;
 388
 389         if((skfd = iw_sockets_open()) < 0) {
 390                 perror("socket");
 391                 exit(-1);
 392         }
 393
 394         prefix = strdup("wl0_");
 395         iw_enum_devices(skfd, &setup_interfaces, NULL, 0);
 396
 397         return 0;
 398 }