| 1 | /* |
| 2 | * iwinfo - Wireless Information Library - Shared utility routines |
| 3 | * |
| 4 | * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org> |
| 5 | * |
| 6 | * The iwinfo library is free software: you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License version 2 |
| 8 | * as published by the Free Software Foundation. |
| 9 | * |
| 10 | * The iwinfo library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 13 | * See the GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License along |
| 16 | * with the iwinfo library. If not, see http://www.gnu.org/licenses/. |
| 17 | * |
| 18 | * The signal handling code is derived from the official madwifi tools, |
| 19 | * wlanconfig.c in particular. The encryption property handling was |
| 20 | * inspired by the hostapd madwifi driver. |
| 21 | */ |
| 22 | |
| 23 | #include "iwinfo/utils.h" |
| 24 | |
| 25 | |
| 26 | static int ioctl_socket = -1; |
| 27 | |
| 28 | static int iwinfo_ioctl_socket(void) |
| 29 | { |
| 30 | /* Prepare socket */ |
| 31 | if( ioctl_socket == -1 ) |
| 32 | { |
| 33 | ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0); |
| 34 | fcntl(ioctl_socket, F_SETFD, fcntl(ioctl_socket, F_GETFD) | FD_CLOEXEC); |
| 35 | } |
| 36 | |
| 37 | return ioctl_socket; |
| 38 | } |
| 39 | |
| 40 | int iwinfo_ioctl(int cmd, void *ifr) |
| 41 | { |
| 42 | int s = iwinfo_ioctl_socket(); |
| 43 | return ioctl(s, cmd, ifr); |
| 44 | } |
| 45 | |
| 46 | int iwinfo_dbm2mw(int in) |
| 47 | { |
| 48 | double res = 1.0; |
| 49 | int ip = in / 10; |
| 50 | int fp = in % 10; |
| 51 | int k; |
| 52 | |
| 53 | for(k = 0; k < ip; k++) res *= 10; |
| 54 | for(k = 0; k < fp; k++) res *= LOG10_MAGIC; |
| 55 | |
| 56 | return (int)res; |
| 57 | } |
| 58 | |
| 59 | int iwinfo_mw2dbm(int in) |
| 60 | { |
| 61 | double fin = (double) in; |
| 62 | int res = 0; |
| 63 | |
| 64 | while(fin > 10.0) |
| 65 | { |
| 66 | res += 10; |
| 67 | fin /= 10.0; |
| 68 | } |
| 69 | |
| 70 | while(fin > 1.000001) |
| 71 | { |
| 72 | res += 1; |
| 73 | fin /= LOG10_MAGIC; |
| 74 | } |
| 75 | |
| 76 | return (int)res; |
| 77 | } |
| 78 | |
| 79 | int iwinfo_ifup(const char *ifname) |
| 80 | { |
| 81 | struct ifreq ifr; |
| 82 | |
| 83 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); |
| 84 | |
| 85 | if( iwinfo_ioctl(SIOCGIFFLAGS, &ifr) ) |
| 86 | return 0; |
| 87 | |
| 88 | ifr.ifr_flags |= (IFF_UP | IFF_RUNNING); |
| 89 | |
| 90 | return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr); |
| 91 | } |
| 92 | |
| 93 | int iwinfo_ifdown(const char *ifname) |
| 94 | { |
| 95 | struct ifreq ifr; |
| 96 | |
| 97 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); |
| 98 | |
| 99 | if( iwinfo_ioctl(SIOCGIFFLAGS, &ifr) ) |
| 100 | return 0; |
| 101 | |
| 102 | ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING); |
| 103 | |
| 104 | return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr); |
| 105 | } |
| 106 | |
| 107 | int iwinfo_ifmac(const char *ifname) |
| 108 | { |
| 109 | struct ifreq ifr; |
| 110 | |
| 111 | strncpy(ifr.ifr_name, ifname, IFNAMSIZ); |
| 112 | |
| 113 | if( iwinfo_ioctl(SIOCGIFHWADDR, &ifr) ) |
| 114 | return 0; |
| 115 | |
| 116 | ifr.ifr_hwaddr.sa_data[1]++; |
| 117 | ifr.ifr_hwaddr.sa_data[2]++; |
| 118 | |
| 119 | return !iwinfo_ioctl(SIOCSIFHWADDR, &ifr); |
| 120 | } |
| 121 | |
| 122 | void iwinfo_close(void) |
| 123 | { |
| 124 | if( ioctl_socket > -1 ) |
| 125 | close(ioctl_socket); |
| 126 | } |
| 127 | |
| 128 | struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id) |
| 129 | { |
| 130 | const struct iwinfo_hardware_entry *e; |
| 131 | |
| 132 | for (e = IWINFO_HARDWARE_ENTRIES; e->vendor_name; e++) |
| 133 | { |
| 134 | if ((e->vendor_id != 0xffff) && (e->vendor_id != id->vendor_id)) |
| 135 | continue; |
| 136 | |
| 137 | if ((e->device_id != 0xffff) && (e->device_id != id->device_id)) |
| 138 | continue; |
| 139 | |
| 140 | if ((e->subsystem_vendor_id != 0xffff) && |
| 141 | (e->subsystem_vendor_id != id->subsystem_vendor_id)) |
| 142 | continue; |
| 143 | |
| 144 | if ((e->subsystem_device_id != 0xffff) && |
| 145 | (e->subsystem_device_id != id->subsystem_device_id)) |
| 146 | continue; |
| 147 | |
| 148 | return (struct iwinfo_hardware_entry *)e; |
| 149 | } |
| 150 | |
| 151 | return NULL; |
| 152 | } |
| 153 | |
| 154 | int iwinfo_hardware_id_from_mtd(struct iwinfo_hardware_id *id) |
| 155 | { |
| 156 | FILE *mtd; |
| 157 | uint16_t *bc; |
| 158 | |
| 159 | int fd, len, off; |
| 160 | char buf[128]; |
| 161 | |
| 162 | if (!(mtd = fopen("/proc/mtd", "r"))) |
| 163 | return -1; |
| 164 | |
| 165 | while (fgets(buf, sizeof(buf), mtd) > 0) |
| 166 | { |
| 167 | if (fscanf(mtd, "mtd%d: %*x %x %127s", &off, &len, buf) < 3 || |
| 168 | (strcmp(buf, "\"boardconfig\"") && strcmp(buf, "\"EEPROM\"") && |
| 169 | strcmp(buf, "\"factory\""))) |
| 170 | { |
| 171 | off = -1; |
| 172 | continue; |
| 173 | } |
| 174 | |
| 175 | break; |
| 176 | } |
| 177 | |
| 178 | fclose(mtd); |
| 179 | |
| 180 | if (off < 0) |
| 181 | return -1; |
| 182 | |
| 183 | snprintf(buf, sizeof(buf), "/dev/mtdblock%d", off); |
| 184 | |
| 185 | if ((fd = open(buf, O_RDONLY)) < 0) |
| 186 | return -1; |
| 187 | |
| 188 | bc = mmap(NULL, len, PROT_READ, MAP_PRIVATE|MAP_LOCKED, fd, 0); |
| 189 | |
| 190 | if ((void *)bc != MAP_FAILED) |
| 191 | { |
| 192 | id->vendor_id = 0; |
| 193 | id->device_id = 0; |
| 194 | |
| 195 | for (off = len / 2 - 0x800; off >= 0; off -= 0x800) |
| 196 | { |
| 197 | /* AR531X board data magic */ |
| 198 | if ((bc[off] == 0x3533) && (bc[off + 1] == 0x3131)) |
| 199 | { |
| 200 | id->vendor_id = bc[off + 0x7d]; |
| 201 | id->device_id = bc[off + 0x7c]; |
| 202 | id->subsystem_vendor_id = bc[off + 0x84]; |
| 203 | id->subsystem_device_id = bc[off + 0x83]; |
| 204 | break; |
| 205 | } |
| 206 | |
| 207 | /* AR5416 EEPROM magic */ |
| 208 | else if ((bc[off] == 0xA55A) || (bc[off] == 0x5AA5)) |
| 209 | { |
| 210 | id->vendor_id = bc[off + 0x0D]; |
| 211 | id->device_id = bc[off + 0x0E]; |
| 212 | id->subsystem_vendor_id = bc[off + 0x13]; |
| 213 | id->subsystem_device_id = bc[off + 0x14]; |
| 214 | break; |
| 215 | } |
| 216 | |
| 217 | /* Rt3xxx SoC */ |
| 218 | else if ((bc[off] == 0x3352) || (bc[off] == 0x5233) || |
| 219 | (bc[off] == 0x3350) || (bc[off] == 0x5033) || |
| 220 | (bc[off] == 0x3050) || (bc[off] == 0x5030) || |
| 221 | (bc[off] == 0x3052) || (bc[off] == 0x5230)) |
| 222 | { |
| 223 | /* vendor: RaLink */ |
| 224 | id->vendor_id = 0x1814; |
| 225 | id->subsystem_vendor_id = 0x1814; |
| 226 | |
| 227 | /* device */ |
| 228 | if (bc[off] & 0xf0 == 0x30) |
| 229 | id->device_id = (bc[off] >> 8) | (bc[off] & 0x00ff) << 8; |
| 230 | else |
| 231 | id->device_id = bc[off]; |
| 232 | |
| 233 | /* subsystem from EEPROM_NIC_CONF0_RF_TYPE */ |
| 234 | id->subsystem_device_id = (bc[off + 0x1a] & 0x0f00) >> 8; |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | munmap(bc, len); |
| 239 | } |
| 240 | |
| 241 | close(fd); |
| 242 | |
| 243 | return (id->vendor_id && id->device_id) ? 0 : -1; |
| 244 | } |
| 245 | |
| 246 | void iwinfo_parse_rsn(struct iwinfo_crypto_entry *c, uint8_t *data, uint8_t len, |
| 247 | uint8_t defcipher, uint8_t defauth) |
| 248 | { |
| 249 | uint16_t i, count; |
| 250 | |
| 251 | static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 }; |
| 252 | static unsigned char ieee80211_oui[3] = { 0x00, 0x0f, 0xac }; |
| 253 | |
| 254 | data += 2; |
| 255 | len -= 2; |
| 256 | |
| 257 | if (!memcmp(data, ms_oui, 3)) |
| 258 | c->wpa_version += 1; |
| 259 | else if (!memcmp(data, ieee80211_oui, 3)) |
| 260 | c->wpa_version += 2; |
| 261 | |
| 262 | if (len < 4) |
| 263 | { |
| 264 | c->group_ciphers |= defcipher; |
| 265 | c->pair_ciphers |= defcipher; |
| 266 | c->auth_suites |= defauth; |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | if (!memcmp(data, ms_oui, 3) || !memcmp(data, ieee80211_oui, 3)) |
| 271 | { |
| 272 | switch (data[3]) |
| 273 | { |
| 274 | case 1: c->group_ciphers |= IWINFO_CIPHER_WEP40; break; |
| 275 | case 2: c->group_ciphers |= IWINFO_CIPHER_TKIP; break; |
| 276 | case 4: c->group_ciphers |= IWINFO_CIPHER_CCMP; break; |
| 277 | case 5: c->group_ciphers |= IWINFO_CIPHER_WEP104; break; |
| 278 | case 6: /* AES-128-CMAC */ break; |
| 279 | default: /* proprietary */ break; |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | data += 4; |
| 284 | len -= 4; |
| 285 | |
| 286 | if (len < 2) |
| 287 | { |
| 288 | c->pair_ciphers |= defcipher; |
| 289 | c->auth_suites |= defauth; |
| 290 | return; |
| 291 | } |
| 292 | |
| 293 | count = data[0] | (data[1] << 8); |
| 294 | if (2 + (count * 4) > len) |
| 295 | return; |
| 296 | |
| 297 | for (i = 0; i < count; i++) |
| 298 | { |
| 299 | if (!memcmp(data + 2 + (i * 4), ms_oui, 3) || |
| 300 | !memcmp(data + 2 + (i * 4), ieee80211_oui, 3)) |
| 301 | { |
| 302 | switch (data[2 + (i * 4) + 3]) |
| 303 | { |
| 304 | case 1: c->pair_ciphers |= IWINFO_CIPHER_WEP40; break; |
| 305 | case 2: c->pair_ciphers |= IWINFO_CIPHER_TKIP; break; |
| 306 | case 4: c->pair_ciphers |= IWINFO_CIPHER_CCMP; break; |
| 307 | case 5: c->pair_ciphers |= IWINFO_CIPHER_WEP104; break; |
| 308 | case 6: /* AES-128-CMAC */ break; |
| 309 | default: /* proprietary */ break; |
| 310 | } |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | data += 2 + (count * 4); |
| 315 | len -= 2 + (count * 4); |
| 316 | |
| 317 | if (len < 2) |
| 318 | { |
| 319 | c->auth_suites |= defauth; |
| 320 | return; |
| 321 | } |
| 322 | |
| 323 | count = data[0] | (data[1] << 8); |
| 324 | if (2 + (count * 4) > len) |
| 325 | return; |
| 326 | |
| 327 | for (i = 0; i < count; i++) |
| 328 | { |
| 329 | if (!memcmp(data + 2 + (i * 4), ms_oui, 3) || |
| 330 | !memcmp(data + 2 + (i * 4), ieee80211_oui, 3)) |
| 331 | { |
| 332 | switch (data[2 + (i * 4) + 3]) |
| 333 | { |
| 334 | case 1: c->auth_suites |= IWINFO_KMGMT_8021x; break; |
| 335 | case 2: c->auth_suites |= IWINFO_KMGMT_PSK; break; |
| 336 | case 3: /* FT/IEEE 802.1X */ break; |
| 337 | case 4: /* FT/PSK */ break; |
| 338 | case 5: /* IEEE 802.1X/SHA-256 */ break; |
| 339 | case 6: /* PSK/SHA-256 */ break; |
| 340 | default: /* proprietary */ break; |
| 341 | } |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | data += 2 + (count * 4); |
| 346 | len -= 2 + (count * 4); |
| 347 | } |
| 348 | |
