#include <stdio.h>
#include <unistd.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#define MAXINTERFACES 16
void get_ip()
{
int sock_fd;
struct ifreq buf[MAXINTERFACES];
struct ifconf ifc;
int interface_num;
char *addr;//[ADDR_LEN];
if((sock_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
printf("Create socket failed");
return;
}
ifc.ifc_len = sizeof(buf);
ifc.ifc_req = buf;
if(ioctl(sock_fd, SIOCGIFCONF, (char *)&ifc) < 0)
{
printf("Get a list of interface addresses failed");
return;
}
interface_num = ifc.ifc_len / sizeof(struct ifreq);
printf("The number of interfaces is %d\n", interface_num);
while(interface_num--)
{
printf("Net device: %s\n", buf[interface_num].ifr_name);
if(ioctl(sock_fd, SIOCGIFFLAGS, (char *)&buf[interface_num]) < 0)
{
printf("Get the active flag word of the device");
continue;
}
if(buf[interface_num].ifr_flags & IFF_PROMISC)
printf("Interface is in promiscuous mode\n");
if(buf[interface_num].ifr_flags & IFF_UP)
printf("Interface is running\n");
else
printf("Interface is not running\n");
if(ioctl(sock_fd, SIOCGIFADDR, (char *)&buf[interface_num]) < 0)
{
printf("Get interface address failed");
continue;
}
addr = inet_ntoa(((struct sockaddr_in*)(&buf[interface_num].ifr_addr))->sin_addr);
printf("IP address is %s\n", addr);
}
close(sock_fd);
return;
}
void get_mac()
{
int sock_fd;
struct ifreq buf[MAXINTERFACES];
struct ifconf ifc;
int interface_num;
if((sock_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
{
printf("Create socket failed");
return;
}
ifc.ifc_len = sizeof(buf);
ifc.ifc_req = buf;
if(ioctl(sock_fd, SIOCGIFCONF, (char *)&ifc) < 0)
{
printf("Get a list of interface addresses failed");
return;
}
interface_num = ifc.ifc_len / sizeof(struct ifreq);
printf("The number of interfaces is %d\n", interface_num);
while(interface_num--)
{
printf("Net device: %s\n", buf[interface_num].ifr_name);
if(ioctl(sock_fd, SIOCGIFFLAGS, (char *)&buf[interface_num]) < 0)
{
printf("Get the active flag word of the device");
continue;
}
if(buf[interface_num].ifr_flags & IFF_PROMISC)
printf("Interface is in promiscuous mode\n");
if(buf[interface_num].ifr_flags & IFF_UP)
printf("Interface is running\n");
else
printf("Interface is not running\n");
if(ioctl(sock_fd, SIOCGIFHWADDR, (char *)&buf[interface_num]) < 0)
{
printf("Get the hardware address of a device failed");
continue;
}
printf("Mac address is: %02X:%02X:%02X:%02X:%02X:%02X\n",
(unsigned char)buf[interface_num].ifr_hwaddr.sa_data[0],
(unsigned char)buf[interface_num].ifr_hwaddr.sa_data[1],
(unsigned char)buf[interface_num].ifr_hwaddr.sa_data[2],
(unsigned char)buf[interface_num].ifr_hwaddr.sa_data[3],
(unsigned char)buf[interface_num].ifr_hwaddr.sa_data[4],
(unsigned char)buf[interface_num].ifr_hwaddr.sa_data[5]);
}
close(sock_fd);
}