2 * iwinfo - Wireless Information Library - Shared utility routines
4 * Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
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.
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.
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/.
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.
23 #include "iwinfo/utils.h"
26 static int ioctl_socket = -1;
28 static int iwinfo_ioctl_socket(void)
31 if (ioctl_socket == -1)
33 ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
34 fcntl(ioctl_socket, F_SETFD, fcntl(ioctl_socket, F_GETFD) | FD_CLOEXEC);
40 int iwinfo_ioctl(int cmd, void *ifr)
42 int s = iwinfo_ioctl_socket();
43 return ioctl(s, cmd, ifr);
46 int iwinfo_dbm2mw(int in)
53 for(k = 0; k < ip; k++) res *= 10;
54 for(k = 0; k < fp; k++) res *= LOG10_MAGIC;
59 int iwinfo_mw2dbm(int in)
61 double fin = (double) in;
79 int iwinfo_ifup(const char *ifname)
83 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
85 if (iwinfo_ioctl(SIOCGIFFLAGS, &ifr))
88 ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
90 return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
93 int iwinfo_ifdown(const char *ifname)
97 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
99 if (iwinfo_ioctl(SIOCGIFFLAGS, &ifr))
102 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
104 return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
107 int iwinfo_ifmac(const char *ifname)
111 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
113 if (iwinfo_ioctl(SIOCGIFHWADDR, &ifr))
116 ifr.ifr_hwaddr.sa_data[1]++;
117 ifr.ifr_hwaddr.sa_data[2]++;
119 return !iwinfo_ioctl(SIOCSIFHWADDR, &ifr);
122 void iwinfo_close(void)
124 if (ioctl_socket > -1)
130 struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id)
132 const struct iwinfo_hardware_entry *e;
134 for (e = IWINFO_HARDWARE_ENTRIES; e->vendor_name; e++)
136 if ((e->vendor_id != 0xffff) && (e->vendor_id != id->vendor_id))
139 if ((e->device_id != 0xffff) && (e->device_id != id->device_id))
142 if ((e->subsystem_vendor_id != 0xffff) &&
143 (e->subsystem_vendor_id != id->subsystem_vendor_id))
146 if ((e->subsystem_device_id != 0xffff) &&
147 (e->subsystem_device_id != id->subsystem_device_id))
150 return (struct iwinfo_hardware_entry *)e;
156 int iwinfo_hardware_id_from_mtd(struct iwinfo_hardware_id *id)
164 if (!(mtd = fopen("/proc/mtd", "r")))
167 while (fgets(buf, sizeof(buf), mtd) > 0)
169 if (fscanf(mtd, "mtd%d: %*x %x %127s", &off, &len, buf) < 3 ||
170 (strcmp(buf, "\"boardconfig\"") && strcmp(buf, "\"EEPROM\"") &&
171 strcmp(buf, "\"factory\"")))
185 snprintf(buf, sizeof(buf), "/dev/mtdblock%d", off);
187 if ((fd = open(buf, O_RDONLY)) < 0)
190 bc = mmap(NULL, len, PROT_READ, MAP_PRIVATE|MAP_LOCKED, fd, 0);
192 if ((void *)bc != MAP_FAILED)
197 for (off = len / 2 - 0x800; off >= 0; off -= 0x800)
199 /* AR531X board data magic */
200 if ((bc[off] == 0x3533) && (bc[off + 1] == 0x3131))
202 id->vendor_id = bc[off + 0x7d];
203 id->device_id = bc[off + 0x7c];
204 id->subsystem_vendor_id = bc[off + 0x84];
205 id->subsystem_device_id = bc[off + 0x83];
209 /* AR5416 EEPROM magic */
210 else if ((bc[off] == 0xA55A) || (bc[off] == 0x5AA5))
212 id->vendor_id = bc[off + 0x0D];
213 id->device_id = bc[off + 0x0E];
214 id->subsystem_vendor_id = bc[off + 0x13];
215 id->subsystem_device_id = bc[off + 0x14];
220 else if ((bc[off] == 0x3352) || (bc[off] == 0x5233) ||
221 (bc[off] == 0x3350) || (bc[off] == 0x5033) ||
222 (bc[off] == 0x3050) || (bc[off] == 0x5030) ||
223 (bc[off] == 0x3052) || (bc[off] == 0x5230))
226 id->vendor_id = 0x1814;
227 id->subsystem_vendor_id = 0x1814;
230 if (bc[off] & 0xf0 == 0x30)
231 id->device_id = (bc[off] >> 8) | (bc[off] & 0x00ff) << 8;
233 id->device_id = bc[off];
235 /* subsystem from EEPROM_NIC_CONF0_RF_TYPE */
236 id->subsystem_device_id = (bc[off + 0x1a] & 0x0f00) >> 8;
245 return (id->vendor_id && id->device_id) ? 0 : -1;
248 void iwinfo_parse_rsn(struct iwinfo_crypto_entry *c, uint8_t *data, uint8_t len,
249 uint8_t defcipher, uint8_t defauth)
253 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
254 static unsigned char ieee80211_oui[3] = { 0x00, 0x0f, 0xac };
259 if (!memcmp(data, ms_oui, 3))
261 else if (!memcmp(data, ieee80211_oui, 3))
266 c->group_ciphers |= defcipher;
267 c->pair_ciphers |= defcipher;
268 c->auth_suites |= defauth;
272 if (!memcmp(data, ms_oui, 3) || !memcmp(data, ieee80211_oui, 3))
276 case 1: c->group_ciphers |= IWINFO_CIPHER_WEP40; break;
277 case 2: c->group_ciphers |= IWINFO_CIPHER_TKIP; break;
278 case 4: c->group_ciphers |= IWINFO_CIPHER_CCMP; break;
279 case 5: c->group_ciphers |= IWINFO_CIPHER_WEP104; break;
280 case 6: /* AES-128-CMAC */ break;
281 default: /* proprietary */ break;
290 c->pair_ciphers |= defcipher;
291 c->auth_suites |= defauth;
295 count = data[0] | (data[1] << 8);
296 if (2 + (count * 4) > len)
299 for (i = 0; i < count; i++)
301 if (!memcmp(data + 2 + (i * 4), ms_oui, 3) ||
302 !memcmp(data + 2 + (i * 4), ieee80211_oui, 3))
304 switch (data[2 + (i * 4) + 3])
306 case 1: c->pair_ciphers |= IWINFO_CIPHER_WEP40; break;
307 case 2: c->pair_ciphers |= IWINFO_CIPHER_TKIP; break;
308 case 4: c->pair_ciphers |= IWINFO_CIPHER_CCMP; break;
309 case 5: c->pair_ciphers |= IWINFO_CIPHER_WEP104; break;
310 case 6: /* AES-128-CMAC */ break;
311 default: /* proprietary */ break;
316 data += 2 + (count * 4);
317 len -= 2 + (count * 4);
321 c->auth_suites |= defauth;
325 count = data[0] | (data[1] << 8);
326 if (2 + (count * 4) > len)
329 for (i = 0; i < count; i++)
331 if (!memcmp(data + 2 + (i * 4), ms_oui, 3) ||
332 !memcmp(data + 2 + (i * 4), ieee80211_oui, 3))
334 switch (data[2 + (i * 4) + 3])
336 case 1: c->auth_suites |= IWINFO_KMGMT_8021x; break;
337 case 2: c->auth_suites |= IWINFO_KMGMT_PSK; break;
338 case 3: /* FT/IEEE 802.1X */ break;
339 case 4: /* FT/PSK */ break;
340 case 5: /* IEEE 802.1X/SHA-256 */ break;
341 case 6: /* PSK/SHA-256 */ break;
342 default: /* proprietary */ break;
347 data += 2 + (count * 4);
348 len -= 2 + (count * 4);