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;
27 struct uci_context *uci_ctx = NULL;
29 static int iwinfo_ioctl_socket(void)
32 if (ioctl_socket == -1)
34 ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
35 fcntl(ioctl_socket, F_SETFD, fcntl(ioctl_socket, F_GETFD) | FD_CLOEXEC);
41 int iwinfo_ioctl(int cmd, void *ifr)
43 int s = iwinfo_ioctl_socket();
44 return ioctl(s, cmd, ifr);
47 int iwinfo_dbm2mw(int in)
54 for(k = 0; k < ip; k++) res *= 10;
55 for(k = 0; k < fp; k++) res *= LOG10_MAGIC;
60 int iwinfo_mw2dbm(int in)
62 double fin = (double) in;
80 int iwinfo_ifup(const char *ifname)
84 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
86 if (iwinfo_ioctl(SIOCGIFFLAGS, &ifr))
89 ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
91 return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
94 int iwinfo_ifdown(const char *ifname)
98 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
100 if (iwinfo_ioctl(SIOCGIFFLAGS, &ifr))
103 ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
105 return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
108 int iwinfo_ifmac(const char *ifname)
112 strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
114 if (iwinfo_ioctl(SIOCGIFHWADDR, &ifr))
117 ifr.ifr_hwaddr.sa_data[0] |= 0x02;
118 ifr.ifr_hwaddr.sa_data[1]++;
119 ifr.ifr_hwaddr.sa_data[2]++;
121 return !iwinfo_ioctl(SIOCSIFHWADDR, &ifr);
124 void iwinfo_close(void)
126 if (ioctl_socket > -1)
132 struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id)
135 char buf[256] = { 0 };
136 static struct iwinfo_hardware_entry e;
137 struct iwinfo_hardware_entry *rv = NULL;
139 if (!(db = fopen(IWINFO_HARDWARE_FILE, "r")))
142 while (fgets(buf, sizeof(buf) - 1, db) != NULL)
144 memset(&e, 0, sizeof(e));
146 if (sscanf(buf, "%hx %hx %hx %hx %hd %hd \"%63[^\"]\" \"%63[^\"]\"",
147 &e.vendor_id, &e.device_id,
148 &e.subsystem_vendor_id, &e.subsystem_device_id,
149 &e.txpower_offset, &e.frequency_offset,
150 e.vendor_name, e.device_name) < 8)
153 if ((e.vendor_id != 0xffff) && (e.vendor_id != id->vendor_id))
156 if ((e.device_id != 0xffff) && (e.device_id != id->device_id))
159 if ((e.subsystem_vendor_id != 0xffff) &&
160 (e.subsystem_vendor_id != id->subsystem_vendor_id))
163 if ((e.subsystem_device_id != 0xffff) &&
164 (e.subsystem_device_id != id->subsystem_device_id))
175 int iwinfo_hardware_id_from_mtd(struct iwinfo_hardware_id *id)
183 if (!(mtd = fopen("/proc/mtd", "r")))
186 while (fgets(buf, sizeof(buf), mtd) > 0)
188 if (fscanf(mtd, "mtd%d: %x %*x %127s", &off, &len, buf) < 3 ||
189 (strcmp(buf, "\"boardconfig\"") && strcmp(buf, "\"EEPROM\"") &&
190 strcmp(buf, "\"factory\"")))
204 snprintf(buf, sizeof(buf), "/dev/mtdblock%d", off);
206 if ((fd = open(buf, O_RDONLY)) < 0)
209 bc = mmap(NULL, len, PROT_READ, MAP_PRIVATE|MAP_LOCKED, fd, 0);
211 if ((void *)bc != MAP_FAILED)
216 for (off = len / 2 - 0x800; off >= 0; off -= 0x800)
218 /* AR531X board data magic */
219 if ((bc[off] == 0x3533) && (bc[off + 1] == 0x3131))
221 id->vendor_id = bc[off + 0x7d];
222 id->device_id = bc[off + 0x7c];
223 id->subsystem_vendor_id = bc[off + 0x84];
224 id->subsystem_device_id = bc[off + 0x83];
228 /* AR5416 EEPROM magic */
229 else if ((bc[off] == 0xA55A) || (bc[off] == 0x5AA5))
231 id->vendor_id = bc[off + 0x0D];
232 id->device_id = bc[off + 0x0E];
233 id->subsystem_vendor_id = bc[off + 0x13];
234 id->subsystem_device_id = bc[off + 0x14];
239 else if ((bc[off] == 0x3352) || (bc[off] == 0x5233) ||
240 (bc[off] == 0x3350) || (bc[off] == 0x5033) ||
241 (bc[off] == 0x3050) || (bc[off] == 0x5030) ||
242 (bc[off] == 0x3052) || (bc[off] == 0x5230))
245 id->vendor_id = 0x1814;
246 id->subsystem_vendor_id = 0x1814;
249 if (bc[off] & 0xf0 == 0x30)
250 id->device_id = (bc[off] >> 8) | (bc[off] & 0x00ff) << 8;
252 id->device_id = bc[off];
254 /* subsystem from EEPROM_NIC_CONF0_RF_TYPE */
255 id->subsystem_device_id = (bc[off + 0x1a] & 0x0f00) >> 8;
264 return (id->vendor_id && id->device_id) ? 0 : -1;
267 void iwinfo_parse_rsn(struct iwinfo_crypto_entry *c, uint8_t *data, uint8_t len,
268 uint8_t defcipher, uint8_t defauth)
272 static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
273 static unsigned char ieee80211_oui[3] = { 0x00, 0x0f, 0xac };
278 if (!memcmp(data, ms_oui, 3))
280 else if (!memcmp(data, ieee80211_oui, 3))
285 c->group_ciphers |= defcipher;
286 c->pair_ciphers |= defcipher;
287 c->auth_suites |= defauth;
291 if (!memcmp(data, ms_oui, 3) || !memcmp(data, ieee80211_oui, 3))
295 case 1: c->group_ciphers |= IWINFO_CIPHER_WEP40; break;
296 case 2: c->group_ciphers |= IWINFO_CIPHER_TKIP; break;
297 case 4: c->group_ciphers |= IWINFO_CIPHER_CCMP; break;
298 case 5: c->group_ciphers |= IWINFO_CIPHER_WEP104; break;
299 case 6: /* AES-128-CMAC */ break;
300 default: /* proprietary */ break;
309 c->pair_ciphers |= defcipher;
310 c->auth_suites |= defauth;
314 count = data[0] | (data[1] << 8);
315 if (2 + (count * 4) > len)
318 for (i = 0; i < count; i++)
320 if (!memcmp(data + 2 + (i * 4), ms_oui, 3) ||
321 !memcmp(data + 2 + (i * 4), ieee80211_oui, 3))
323 switch (data[2 + (i * 4) + 3])
325 case 1: c->pair_ciphers |= IWINFO_CIPHER_WEP40; break;
326 case 2: c->pair_ciphers |= IWINFO_CIPHER_TKIP; break;
327 case 4: c->pair_ciphers |= IWINFO_CIPHER_CCMP; break;
328 case 5: c->pair_ciphers |= IWINFO_CIPHER_WEP104; break;
329 case 6: /* AES-128-CMAC */ break;
330 default: /* proprietary */ break;
335 data += 2 + (count * 4);
336 len -= 2 + (count * 4);
340 c->auth_suites |= defauth;
344 count = data[0] | (data[1] << 8);
345 if (2 + (count * 4) > len)
348 for (i = 0; i < count; i++)
350 if (!memcmp(data + 2 + (i * 4), ms_oui, 3) ||
351 !memcmp(data + 2 + (i * 4), ieee80211_oui, 3))
353 switch (data[2 + (i * 4) + 3])
355 case 1: c->auth_suites |= IWINFO_KMGMT_8021x; break;
356 case 2: c->auth_suites |= IWINFO_KMGMT_PSK; break;
357 case 3: /* FT/IEEE 802.1X */ break;
358 case 4: /* FT/PSK */ break;
359 case 5: /* IEEE 802.1X/SHA-256 */ break;
360 case 6: /* PSK/SHA-256 */ break;
361 default: /* proprietary */ break;
366 data += 2 + (count * 4);
367 len -= 2 + (count * 4);
370 struct uci_section *iwinfo_uci_get_radio(const char *name, const char *type)
372 struct uci_ptr ptr = {
373 .package = "wireless",
379 uci_ctx = uci_alloc_context();
384 memset(&ptr, 0, sizeof(ptr));
385 ptr.package = "wireless";
388 if (uci_lookup_ptr(uci_ctx, &ptr, NULL, false))
391 if (!ptr.s || strcmp(ptr.s->type, "wifi-device") != 0)
394 opt = uci_lookup_option_string(uci_ctx, ptr.s, "type");
395 if (!opt || strcmp(opt, type) != 0)
401 void iwinfo_uci_free(void)
406 uci_free_context(uci_ctx);