/**

@file usb_moded-mac.c

Copyright (C) 2013 Jolla. All rights reserved.

@author: Philippe De Swert <philippe.deswert@jollamobile.com>

This program is free software; you can redistribute it and/or

modify it under the terms of the Lesser GNU General Public License

version 2 as published by the Free Software Foundation.

This program 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 Lesser GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA

02110-1301 USA

*/

#include <stdio.h>

#include "usb_moded-mac.h"

static void random_ether_addr(unsigned char *addr)

{

FILE *random;

random = fopen("/dev/urandom", "r");

fclose(random);

if(count > 0 )

{

addr [0] &= 0xfe; /* clear multicast bit */

addr [0] |= 0x02; /* set local assignment bit (IEEE802) */

}

else

log_warning("MAC generation failed!\n");

}

void generate_random_mac (void)

{

unsigned char addr[6];

int i;

FILE *g_ether;

random_ether_addr(addr);

g_ether = fopen("/etc/modprobe.d/g_ether.conf", "w");

if(!g_ether)

{

log_warning("Failed to write mac address to /etc/modprobe.d/g_ether.conf\n");

return;

}

fprintf(g_ether, "options g_ether host_addr=");

for(i=0; i<5; i++)

{

fprintf(g_ether, "%02x:",addr[i]);

}

fclose(g_ether);

}

char * read_mac(void)

{

FILE *g_ether;

char *mac = NULL, *ret = NULL;

size_t read = 0;

g_ether = fopen("/etc/modprobe.d/g_ether.conf", "r");

if(!g_ether)

{

log_warning("Failed to read mac address from /etc/modprobe.d/g_ether.conf\n");

return(NULL);

}

test = fseek(g_ether, 26, SEEK_SET);

if(test == -1)

{

fclose(g_ether);

mac = malloc(sizeof(char) *17);

if(mac)

read = fread(mac, 1, 17, g_ether);

if(read == 17)

ret = strndup(mac,17);

else

ret = 0;

return(ret);

}