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/*
* iwinfo - Wireless Information Library - Shared utility routines
*
* Copyright (C) 2010 Jo-Philipp Wich <xm@subsignal.org>
*
* The iwinfo library is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* The iwinfo library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with the iwinfo library. If not, see http://www.gnu.org/licenses/.
*
* The signal handling code is derived from the official madwifi tools,
* wlanconfig.c in particular. The encryption property handling was
* inspired by the hostapd madwifi driver.
*/
#include "iwinfo/utils.h"
static int ioctl_socket = -1;
static int iwinfo_ioctl_socket(void)
{
/* Prepare socket */
if( ioctl_socket == -1 )
{
ioctl_socket = socket(AF_INET, SOCK_DGRAM, 0);
fcntl(ioctl_socket, F_SETFD, fcntl(ioctl_socket, F_GETFD) | FD_CLOEXEC);
}
return ioctl_socket;
}
int iwinfo_ioctl(int cmd, void *ifr)
{
int s = iwinfo_ioctl_socket();
return ioctl(s, cmd, ifr);
}
int iwinfo_dbm2mw(int in)
{
double res = 1.0;
int ip = in / 10;
int fp = in % 10;
int k;
for(k = 0; k < ip; k++) res *= 10;
for(k = 0; k < fp; k++) res *= LOG10_MAGIC;
return (int)res;
}
int iwinfo_mw2dbm(int in)
{
double fin = (double) in;
int res = 0;
while(fin > 10.0)
{
res += 10;
fin /= 10.0;
}
while(fin > 1.000001)
{
res += 1;
fin /= LOG10_MAGIC;
}
return (int)res;
}
int iwinfo_ifup(const char *ifname)
{
struct ifreq ifr;
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
if( iwinfo_ioctl(SIOCGIFFLAGS, &ifr) )
return 0;
ifr.ifr_flags |= (IFF_UP | IFF_RUNNING);
return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
}
int iwinfo_ifdown(const char *ifname)
{
struct ifreq ifr;
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
if( iwinfo_ioctl(SIOCGIFFLAGS, &ifr) )
return 0;
ifr.ifr_flags &= ~(IFF_UP | IFF_RUNNING);
return !iwinfo_ioctl(SIOCSIFFLAGS, &ifr);
}
int iwinfo_ifmac(const char *ifname)
{
struct ifreq ifr;
strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
if( iwinfo_ioctl(SIOCGIFHWADDR, &ifr) )
return 0;
ifr.ifr_hwaddr.sa_data[1]++;
ifr.ifr_hwaddr.sa_data[2]++;
return !iwinfo_ioctl(SIOCSIFHWADDR, &ifr);
}
void iwinfo_close(void)
{
if( ioctl_socket > -1 )
close(ioctl_socket);
}
struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id)
{
const struct iwinfo_hardware_entry *e;
for (e = IWINFO_HARDWARE_ENTRIES; e->vendor_name; e++)
{
if ((e->vendor_id != 0xffff) && (e->vendor_id != id->vendor_id))
continue;
if ((e->device_id != 0xffff) && (e->device_id != id->device_id))
continue;
if ((e->subsystem_vendor_id != 0xffff) &&
(e->subsystem_vendor_id != id->subsystem_vendor_id))
continue;
if ((e->subsystem_device_id != 0xffff) &&
(e->subsystem_device_id != id->subsystem_device_id))
continue;
return e;
}
return NULL;
}
int iwinfo_hardware_id_from_mtd(struct iwinfo_hardware_id *id)
{
FILE *mtd;
uint16_t *bc;
int fd, len, off;
char buf[128];
if (!(mtd = fopen("/proc/mtd", "r")))
return -1;
while (fgets(buf, sizeof(buf), mtd) > 0)
{
if (fscanf(mtd, "mtd%d: %*x %x %127s", &off, &len, buf) < 3 ||
strcmp(buf, "\"boardconfig\""))
{
off = -1;
continue;
}
break;
}
fclose(mtd);
if (off < 0)
return -1;
snprintf(buf, sizeof(buf), "/dev/mtdblock%d", off);
if ((fd = open(buf, O_RDONLY)) < 0)
return -1;
bc = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_LOCKED, fd, 0);
if ((void *)bc != MAP_FAILED)
{
id->vendor_id = 0;
id->device_id = 0;
for (off = len / 2 - 0x800; off >= 0; off -= 0x800)
{
if ((bc[off] == 0x3533) && (bc[off + 1] == 0x3131))
{
id->vendor_id = bc[off + 0x7d];
id->device_id = bc[off + 0x7c];
id->subsystem_vendor_id = bc[off + 0x84];
id->subsystem_device_id = bc[off + 0x83];
break;
}
}
munmap(bc, len);
}
close(fd);
return (id->vendor_id && id->device_id) ? 0 : -1;
}
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