691 lines
14 KiB
C
691 lines
14 KiB
C
/*
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* iwinfo - Wireless Information Library - Shared utility routines
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*
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* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
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*
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* The iwinfo library is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* The iwinfo library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the iwinfo library. If not, see http://www.gnu.org/licenses/.
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*
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* The signal handling code is derived from the official madwifi tools,
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* wlanconfig.c in particular. The encryption property handling was
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* inspired by the hostapd madwifi driver.
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*/
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#include "iwinfo/utils.h"
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static int ioctl_socket = -1;
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static int iwinfo_ioctl_socket(void)
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{
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/* Prepare socket */
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if (ioctl_socket == -1)
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{
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ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
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fcntl(ioctl_socket, F_SETFD, fcntl(ioctl_socket, F_GETFD) | FD_CLOEXEC);
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}
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return ioctl_socket;
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}
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int iwinfo_ioctl(int cmd, void *ifr)
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{
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int s = iwinfo_ioctl_socket();
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return ioctl(s, cmd, ifr);
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}
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int iwinfo_dbm2mw(int in)
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{
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double res = 1.0;
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int ip = in / 10;
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int fp = in % 10;
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int k;
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for(k = 0; k < ip; k++) res *= 10;
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for(k = 0; k < fp; k++) res *= LOG10_MAGIC;
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return (int)res;
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}
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int iwinfo_mw2dbm(int in)
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{
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double fin = (double) in;
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int res = 0;
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while(fin > 10.0)
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{
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res += 10;
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fin /= 10.0;
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}
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while(fin > 1.000001)
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{
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res += 1;
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fin /= LOG10_MAGIC;
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}
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return (int)res;
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}
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static int iwinfo_bit(int value, int max)
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{
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int i;
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if (max > 31 || !(value & ((1 << max) - 1)))
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return -1;
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for (i = 0; i < max; i++)
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{
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if (value & 1)
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break;
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value >>= 1;
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}
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return i;
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}
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static const char * const iwinfo_name(int mask, int max, const char * const names[])
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{
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int index = iwinfo_bit(mask, max);
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if (index < 0)
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return NULL;
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return names[index];
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}
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const char * const iwinfo_band_name(int mask)
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{
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return iwinfo_name(mask, IWINFO_BAND_COUNT, IWINFO_BAND_NAMES);
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}
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const char * const iwinfo_htmode_name(int mask)
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{
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return iwinfo_name(mask, IWINFO_HTMODE_COUNT, IWINFO_HTMODE_NAMES);
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}
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uint32_t iwinfo_band2ghz(uint8_t band)
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{
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switch (band)
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{
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case IWINFO_BAND_24:
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return 2;
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case IWINFO_BAND_5:
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return 5;
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case IWINFO_BAND_6:
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return 6;
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case IWINFO_BAND_60:
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return 60;
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}
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return 0;
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}
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uint8_t iwinfo_ghz2band(uint32_t ghz)
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{
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switch (ghz)
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{
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case 2:
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return IWINFO_BAND_24;
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case 5:
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return IWINFO_BAND_5;
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case 6:
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return IWINFO_BAND_6;
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case 60:
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return IWINFO_BAND_60;
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}
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return 0;
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}
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size_t iwinfo_format_hwmodes(int modes, char *buf, size_t len)
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{
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// bit numbers as per IWINFO_80211_*: ad ac ax a b g n
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const int order[IWINFO_80211_COUNT] = { 5, 4, 6, 0, 1, 2, 3 };
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size_t res = 0;
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int i;
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*buf = 0;
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if (!(modes & ((1 << IWINFO_80211_COUNT) - 1)))
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return 0;
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for (i = 0; i < IWINFO_80211_COUNT; i++)
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if (modes & 1 << order[i])
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res += snprintf(buf + res, len - res, "%s/", IWINFO_80211_NAMES[order[i]]);
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if (res > 0)
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{
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res--;
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buf[res] = 0;
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}
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return res;
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}
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int iwinfo_htmode_is_ht(int htmode)
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{
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switch (htmode)
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{
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case IWINFO_HTMODE_HT20:
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case IWINFO_HTMODE_HT40:
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return 1;
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}
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return 0;
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}
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int iwinfo_htmode_is_vht(int htmode)
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{
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switch (htmode)
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{
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case IWINFO_HTMODE_VHT20:
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case IWINFO_HTMODE_VHT40:
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case IWINFO_HTMODE_VHT80:
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case IWINFO_HTMODE_VHT80_80:
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case IWINFO_HTMODE_VHT160:
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return 1;
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}
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return 0;
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}
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int iwinfo_htmode_is_he(int htmode)
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{
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switch (htmode)
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{
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case IWINFO_HTMODE_HE20:
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case IWINFO_HTMODE_HE40:
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case IWINFO_HTMODE_HE80:
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case IWINFO_HTMODE_HE80_80:
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case IWINFO_HTMODE_HE160:
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return 1;
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}
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return 0;
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}
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int iwinfo_ifup(const char *ifname)
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{
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struct ifreq ifr;
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strncpy(ifr.ifr_name, ifname, IFNAMSIZ - 1);
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if (iwinfo_ioctl(SIOCGIFFLAGS, &ifr))
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return 0;
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ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
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return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
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}
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int iwinfo_ifdown(const char *ifname)
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{
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struct ifreq ifr;
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strncpy(ifr.ifr_name, ifname, IFNAMSIZ - 1);
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if (iwinfo_ioctl(SIOCGIFFLAGS, &ifr))
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return 0;
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ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
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return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
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}
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int iwinfo_ifmac(const char *ifname)
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{
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struct ifreq ifr;
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strncpy(ifr.ifr_name, ifname, IFNAMSIZ - 1);
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if (iwinfo_ioctl(SIOCGIFHWADDR, &ifr))
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return 0;
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ifr.ifr_hwaddr.sa_data[0] |= 0x02;
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ifr.ifr_hwaddr.sa_data[1]++;
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ifr.ifr_hwaddr.sa_data[2]++;
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return !iwinfo_ioctl(SIOCSIFHWADDR, &ifr);
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}
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void iwinfo_close(void)
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{
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if (ioctl_socket > -1)
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close(ioctl_socket);
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ioctl_socket = -1;
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}
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struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id)
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{
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FILE *db;
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char buf[256] = { 0 };
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static struct iwinfo_hardware_entry e;
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struct iwinfo_hardware_entry *rv = NULL;
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if (!(db = fopen(IWINFO_HARDWARE_FILE, "r")))
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return NULL;
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while (fgets(buf, sizeof(buf) - 1, db) != NULL)
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{
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if (buf[0] == '#')
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continue;
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memset(&e, 0, sizeof(e));
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if (sscanf(buf, "%hx %hx %hx %hx %hd %hd \"%63[^\"]\" \"%63[^\"]\"",
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&e.vendor_id, &e.device_id,
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&e.subsystem_vendor_id, &e.subsystem_device_id,
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&e.txpower_offset, &e.frequency_offset,
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e.vendor_name, e.device_name) != 8 &&
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sscanf(buf, "\"%127[^\"]\" %hd %hd \"%63[^\"]\" \"%63[^\"]\"",
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e.compatible, &e.txpower_offset, &e.frequency_offset,
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e.vendor_name, e.device_name) != 5)
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continue;
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if ((e.vendor_id != 0xffff) && (e.vendor_id != id->vendor_id))
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continue;
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if ((e.device_id != 0xffff) && (e.device_id != id->device_id))
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continue;
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if ((e.subsystem_vendor_id != 0xffff) &&
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(e.subsystem_vendor_id != id->subsystem_vendor_id))
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continue;
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if ((e.subsystem_device_id != 0xffff) &&
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(e.subsystem_device_id != id->subsystem_device_id))
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continue;
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if (strcmp(e.compatible, id->compatible))
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continue;
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rv = &e;
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break;
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}
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fclose(db);
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return rv;
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}
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int iwinfo_hardware_id_from_mtd(struct iwinfo_hardware_id *id)
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{
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FILE *mtd;
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uint16_t *bc;
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int fd, off;
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unsigned int len;
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char buf[128];
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if (!(mtd = fopen("/proc/mtd", "r")))
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return -1;
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while (fgets(buf, sizeof(buf), mtd) != NULL)
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{
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if (fscanf(mtd, "mtd%d: %x %*x %127s", &off, &len, buf) < 3 ||
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(strcmp(buf, "\"boardconfig\"") && strcmp(buf, "\"EEPROM\"") &&
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strcmp(buf, "\"factory\"")))
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{
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off = -1;
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continue;
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}
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break;
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}
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fclose(mtd);
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if (off < 0)
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return -1;
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snprintf(buf, sizeof(buf), "/dev/mtdblock%d", off);
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if ((fd = open(buf, O_RDONLY)) < 0)
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return -1;
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bc = mmap(NULL, len, PROT_READ, MAP_PRIVATE|MAP_LOCKED, fd, 0);
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if ((void *)bc != MAP_FAILED)
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{
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id->vendor_id = 0;
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id->device_id = 0;
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for (off = len / 2 - 0x800; off >= 0; off -= 0x800)
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{
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/* AR531X board data magic */
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if ((bc[off] == 0x3533) && (bc[off + 1] == 0x3131))
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{
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id->vendor_id = bc[off + 0x7d];
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id->device_id = bc[off + 0x7c];
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id->subsystem_vendor_id = bc[off + 0x84];
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id->subsystem_device_id = bc[off + 0x83];
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break;
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}
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/* AR5416 EEPROM magic */
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else if ((bc[off] == 0xA55A) || (bc[off] == 0x5AA5))
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{
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id->vendor_id = bc[off + 0x0D];
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id->device_id = bc[off + 0x0E];
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id->subsystem_vendor_id = bc[off + 0x13];
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id->subsystem_device_id = bc[off + 0x14];
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break;
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}
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/* Rt3xxx SoC */
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else if ((bc[off] == 0x3050) || (bc[off] == 0x5030) ||
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(bc[off] == 0x3051) || (bc[off] == 0x5130) ||
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(bc[off] == 0x3052) || (bc[off] == 0x5230) ||
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(bc[off] == 0x3350) || (bc[off] == 0x5033) ||
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(bc[off] == 0x3352) || (bc[off] == 0x5233) ||
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(bc[off] == 0x3662) || (bc[off] == 0x6236) ||
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(bc[off] == 0x3883) || (bc[off] == 0x8338) ||
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(bc[off] == 0x5350) || (bc[off] == 0x5053))
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{
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/* vendor: RaLink */
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id->vendor_id = 0x1814;
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id->subsystem_vendor_id = 0x1814;
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/* device */
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if (((bc[off] & 0xf0) == 0x30) ||
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((bc[off] & 0xff) == 0x53))
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id->device_id = (bc[off] >> 8) | (bc[off] & 0x00ff) << 8;
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else
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id->device_id = bc[off];
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/* subsystem from EEPROM_NIC_CONF0_RF_TYPE */
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id->subsystem_device_id = (bc[off + 0x1a] & 0x0f00) >> 8;
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} else if ((bc[off] == 0x7620) || (bc[off] == 0x2076) ||
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(bc[off] == 0x7628) || (bc[off] == 0x2876) ||
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(bc[off] == 0x7688) || (bc[off] == 0x8876)) {
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/* vendor: MediaTek */
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id->vendor_id = 0x14c3;
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id->subsystem_vendor_id = 0x14c3;
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/* device */
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if ((bc[off] & 0xff) == 0x76)
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id->device_id = (bc[off] >> 8) | (bc[off] & 0x00ff) << 8;
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else
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id->device_id = bc[off];
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/* subsystem from EEPROM_NIC_CONF0_RF_TYPE */
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id->subsystem_device_id = (bc[off + 0x1a] & 0x0f00) >> 8;
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}
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}
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munmap(bc, len);
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}
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close(fd);
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return (id->vendor_id && id->device_id) ? 0 : -1;
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}
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static void iwinfo_parse_rsn_cipher(uint8_t idx, uint16_t *ciphers)
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{
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switch (idx)
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{
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case 0:
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*ciphers |= IWINFO_CIPHER_NONE;
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break;
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case 1:
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*ciphers |= IWINFO_CIPHER_WEP40;
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break;
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case 2:
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*ciphers |= IWINFO_CIPHER_TKIP;
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break;
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case 3: /* WRAP */
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break;
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case 4:
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*ciphers |= IWINFO_CIPHER_CCMP;
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break;
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case 5:
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*ciphers |= IWINFO_CIPHER_WEP104;
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break;
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case 8:
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*ciphers |= IWINFO_CIPHER_GCMP;
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break;
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case 9:
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*ciphers |= IWINFO_CIPHER_GCMP256;
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break;
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case 10:
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*ciphers |= IWINFO_CIPHER_CCMP256;
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break;
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case 6: /* AES-128-CMAC */
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case 7: /* No group addressed */
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case 11: /* BIP-GMAC-128 */
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case 12: /* BIP-GMAC-256 */
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case 13: /* BIP-CMAC-256 */
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break;
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}
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}
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void iwinfo_parse_rsn(struct iwinfo_crypto_entry *c, uint8_t *data, uint8_t len,
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uint16_t defcipher, uint8_t defauth)
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{
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uint16_t i, count;
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uint8_t wpa_version = 0;
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static unsigned char ms_oui[3] = { 0x00, 0x50, 0xf2 };
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static unsigned char ieee80211_oui[3] = { 0x00, 0x0f, 0xac };
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data += 2;
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len -= 2;
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if (!memcmp(data, ms_oui, 3))
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wpa_version |= 1;
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else if (!memcmp(data, ieee80211_oui, 3))
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wpa_version |= 2;
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if (len < 4)
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{
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c->group_ciphers |= defcipher;
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c->pair_ciphers |= defcipher;
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c->auth_suites |= defauth;
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return;
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}
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if (!memcmp(data, ms_oui, 3) || !memcmp(data, ieee80211_oui, 3))
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iwinfo_parse_rsn_cipher(data[3], &c->group_ciphers);
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data += 4;
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len -= 4;
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if (len < 2)
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{
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c->pair_ciphers |= defcipher;
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c->auth_suites |= defauth;
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return;
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}
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count = data[0] | (data[1] << 8);
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if (2 + (count * 4) > len)
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return;
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for (i = 0; i < count; i++)
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if (!memcmp(data + 2 + (i * 4), ms_oui, 3) ||
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!memcmp(data + 2 + (i * 4), ieee80211_oui, 3))
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iwinfo_parse_rsn_cipher(data[2 + (i * 4) + 3], &c->pair_ciphers);
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data += 2 + (count * 4);
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len -= 2 + (count * 4);
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if (len < 2)
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{
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c->auth_suites |= defauth;
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return;
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}
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count = data[0] | (data[1] << 8);
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if (2 + (count * 4) > len)
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return;
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for (i = 0; i < count; i++)
|
|
{
|
|
if (!memcmp(data + 2 + (i * 4), ms_oui, 3) ||
|
|
!memcmp(data + 2 + (i * 4), ieee80211_oui, 3))
|
|
{
|
|
switch (data[2 + (i * 4) + 3])
|
|
{
|
|
case 1: /* IEEE 802.1x */
|
|
c->wpa_version |= wpa_version;
|
|
c->auth_suites |= IWINFO_KMGMT_8021x;
|
|
break;
|
|
|
|
case 2: /* PSK */
|
|
c->wpa_version |= wpa_version;
|
|
c->auth_suites |= IWINFO_KMGMT_PSK;
|
|
break;
|
|
|
|
case 3: /* FT/IEEE 802.1X */
|
|
case 4: /* FT/PSK */
|
|
case 5: /* IEEE 802.1X/SHA-256 */
|
|
case 6: /* PSK/SHA-256 */
|
|
case 7: /* TPK Handshake */
|
|
break;
|
|
|
|
case 8: /* SAE */
|
|
c->wpa_version |= 4;
|
|
c->auth_suites |= IWINFO_KMGMT_SAE;
|
|
break;
|
|
|
|
case 9: /* FT/SAE */
|
|
case 10: /* undefined */
|
|
break;
|
|
|
|
case 11: /* 802.1x Suite-B */
|
|
case 12: /* 802.1x Suite-B-192 */
|
|
case 13: /* FT/802.1x SHA-384 */
|
|
c->wpa_version |= 4;
|
|
c->auth_suites |= IWINFO_KMGMT_8021x;
|
|
break;
|
|
|
|
case 14: /* FILS SHA-256 */
|
|
case 15: /* FILS SHA-384 */
|
|
case 16: /* FT/FILS SHA-256 */
|
|
case 17: /* FT/FILS SHA-384 */
|
|
break;
|
|
|
|
case 18: /* OWE */
|
|
c->wpa_version |= 4;
|
|
c->auth_suites |= IWINFO_KMGMT_OWE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
data += 2 + (count * 4);
|
|
len -= 2 + (count * 4);
|
|
}
|
|
|
|
struct iwinfo_ubus_query_state {
|
|
const char *ifname;
|
|
const char *field;
|
|
size_t len;
|
|
char *buf;
|
|
};
|
|
|
|
static void iwinfo_ubus_query_cb(struct ubus_request *req, int type,
|
|
struct blob_attr *msg)
|
|
{
|
|
struct iwinfo_ubus_query_state *st = req->priv;
|
|
|
|
struct blobmsg_policy pol1[2] = {
|
|
{ "ifname", BLOBMSG_TYPE_STRING },
|
|
{ "config", BLOBMSG_TYPE_TABLE }
|
|
};
|
|
|
|
struct blobmsg_policy pol2 = { st->field, BLOBMSG_TYPE_STRING };
|
|
struct blob_attr *cur, *cur2, *cur3, *cfg[2], *res;
|
|
int rem, rem2, rem3;
|
|
|
|
blobmsg_for_each_attr(cur, msg, rem) {
|
|
if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE)
|
|
continue;
|
|
|
|
blobmsg_for_each_attr(cur2, cur, rem2) {
|
|
if (blobmsg_type(cur2) != BLOBMSG_TYPE_ARRAY)
|
|
continue;
|
|
|
|
if (strcmp(blobmsg_name(cur2), "interfaces"))
|
|
continue;
|
|
|
|
blobmsg_for_each_attr(cur3, cur2, rem3) {
|
|
blobmsg_parse(pol1, sizeof(pol1) / sizeof(pol1[0]), cfg,
|
|
blobmsg_data(cur3), blobmsg_len(cur3));
|
|
|
|
if (!cfg[0] || !cfg[1] ||
|
|
strcmp(blobmsg_get_string(cfg[0]), st->ifname))
|
|
continue;
|
|
|
|
blobmsg_parse(&pol2, 1, &res,
|
|
blobmsg_data(cfg[1]), blobmsg_len(cfg[1]));
|
|
|
|
if (!res)
|
|
continue;
|
|
|
|
strncpy(st->buf, blobmsg_get_string(res), st->len);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int iwinfo_ubus_query(const char *ifname, const char *field,
|
|
char *buf, size_t len)
|
|
{
|
|
struct iwinfo_ubus_query_state st = {
|
|
.ifname = ifname,
|
|
.field = field,
|
|
.buf = buf,
|
|
.len = len
|
|
};
|
|
|
|
struct ubus_context *ctx = NULL;
|
|
struct blob_buf b = { };
|
|
int rv = -1;
|
|
uint32_t id;
|
|
|
|
blob_buf_init(&b, 0);
|
|
|
|
ctx = ubus_connect(NULL);
|
|
|
|
if (!ctx)
|
|
goto out;
|
|
|
|
if (ubus_lookup_id(ctx, "network.wireless", &id))
|
|
goto out;
|
|
|
|
if (ubus_invoke(ctx, id, "status", b.head, iwinfo_ubus_query_cb, &st, 250))
|
|
goto out;
|
|
|
|
rv = 0;
|
|
|
|
out:
|
|
if (ctx)
|
|
ubus_free(ctx);
|
|
|
|
blob_buf_free(&b);
|
|
|
|
return rv;
|
|
}
|