utility.c

#include "utility.h"
#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <stdbool.h>
#include <net/if.h>

void get_mac(char* __iface, unsigned char __mac_str[13])
{
    #define HWADDR_len 6
    int s,i;
    struct ifreq ifr;
    s = socket(AF_INET, SOCK_DGRAM, 0);
    strcpy(ifr.ifr_name, __iface);
    ioctl(s, SIOCGIFHWADDR, &ifr);
    for (i=0; i<HWADDR_len; i++)
        sprintf((char*)&__mac_str[i*2],"%02X",((unsigned char*)ifr.ifr_hwaddr.sa_data)[i]);
    __mac_str[12]='\0';
}

void print_bits(size_t const  size, void const * const ptr)
{
    unsigned char *b = (unsigned char*) ptr;
    unsigned char byte;
    int i, j;

    for (i=size-1;i>=0;i--)
    {
        for (j=7;j>=0;j--)
        {
            byte = (b[i] >> j) & 1;
            printf("%u", byte);
        }
    }
    puts("");
}

uint16_t btois(void const* const ptr)
{
	//uint16_t res = ptr[0] + ptr[1];
	return 1;
}