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/*
* Copyright 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "wfc_util_log.h"
#define WFC_UTIL_RANDOM_MAC_HEADER "001122"
void wfc_util_htoa(unsigned char *pHexaBuff, int szHexaBuff, char *pAsciiStringBuff, int szAsciiStringBuff)
{
int i, j;
char hex_table[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'};
if ((szHexaBuff*2) > szAsciiStringBuff) {
wfc_util_log_error("wfc_util_htoa : not enough buffer size(%d)", szAsciiStringBuff);
return;
}
memset(pAsciiStringBuff, 0, szAsciiStringBuff);
/* for (i = szHexaBuff-1, j = 0; i >= 0; i--, j += 2) { */
for (i = 0, j = 0; i < szHexaBuff; i++, j += 2) {
/*pAsciiStringBuff[j] = hex_table[(pHexaBuff[i] >> 4) & 0x0F];
*/
pAsciiStringBuff[j] = hex_table[pHexaBuff[i] >> 4];
pAsciiStringBuff[j + 1] = hex_table[pHexaBuff[i] & 0x0F];
}
return;
}
void wfc_util_atoh(char *pAsciiString, int szAsciiString, unsigned char *pHexaBuff, int szHexaBuff)
{
int i, pos;
char temp;
if ( 0!=(szAsciiString%2) || (szHexaBuff*2) < szAsciiString) {
wfc_util_log_error("wfc_util_atoh : not enough buffer size(%d)", szHexaBuff);
return;
}
memset(pHexaBuff, 0, szHexaBuff);
for (i=0 ; i<szAsciiString ; i++) {
/* pos = (szAsciiString - i - 1) / 2; */
pos = i / 2;
temp = pAsciiString[i];
if (temp >= '0' && temp <= '9') {
temp = temp - '0';
} else if ( temp >= 'a' && temp <= 'f' ) {
temp = temp - 'a' + 10;
} else if ( temp >= 'A' && temp <= 'F' ) {
temp = temp - 'A' + 10;
} else {
temp = 0;
}
if (0==i%2) {
pHexaBuff[pos] = temp<<4;
} else {
pHexaBuff[pos] |= temp;
}
}
return;
}
/*
* wfc_util_is_random_mac
*
* return : it will return 1 if [mac_add] is same with WFC_UTIL_RANDOM_MAC_HEADER
* or will return 0 if not.
*/
int wfc_util_is_random_mac(char *mac_add)
{
if(0 == strncmp(mac_add, WFC_UTIL_RANDOM_MAC_HEADER, 6)) {
return 1;
}
return 0;
}
/*
* wfc_util_random_mac
*
* Create random MAC address
*
* return : void
*/
void wfc_util_random_mac(unsigned char* mac_addr)
{
unsigned long int rand_mac;
if(NULL == mac_addr) {
wfc_util_log_error("wfc_util_random_mac : buffer is NULL");
return;
}
/* Create random MAC address: offset 3, 4 and 5 */
srandom(time(NULL));
rand_mac=random();
#ifndef WFC_UTIL_RANDOM_MAC_HEADER
mac_addr[0] = (unsigned char)0x00;
mac_addr[1] = (unsigned char)0x11;
mac_addr[2] = (unsigned char)0x22;
#else /* WFC_UTIL_RANDOM_MAC_HEADER */
wfc_util_atoh(WFC_UTIL_RANDOM_MAC_HEADER, 6, mac_addr, 3);
#endif /* WFC_UTIL_RANDOM_MAC_HEADER */
mac_addr[3] = (unsigned char)rand_mac;
mac_addr[4] = (unsigned char)(rand_mac >> 8);
mac_addr[5] = (unsigned char)(rand_mac >> 16);
return;
}
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