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Linux获取IP和MAC地址

分类： LINUX

2011-05-23 15:31:19

  1. #include <stdio.h>

  3. #include <sys/types.h>

  5. #include <sys/param.h>

  7. #include <sys/ioctl.h>

  9. #include <sys/socket.h>

  11. #include <net/if.h>

  13. #include <netinet/in.h>

  15. #include <net/if_arp.h>

  17.  

  19. #define MAXINTERFACES 16

  21.  

  23. int main(int argc, char **argv)

  25. {

  27.     register int fd, interface, retn = 0;

  29.     struct ifreq buf[MAXINTERFACES];

  31.     struct arpreq arp;

  33.     struct ifconf ifc;

  35.     char mac[32] = "";

  37.  

  39.     if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) >= 0) {

  41.         ifc.ifc_len = sizeof buf;

  43.         ifc.ifc_buf = (caddr_t) buf;

  45.         if (!ioctl(fd, SIOCGIFCONF, (char *) &ifc)) {

  47.             interface = ifc.ifc_len / sizeof(struct ifreq);

  49.             printf("interface num is interface=%d\n\n", interface);

  51.             while (interface-- > 0) {

  53.                 printf("net device %s\n", buf[interface].ifr_name);

  55.  

  57. /*Jugde whether the net card status is promisc */

  59.                 if (!(ioctl(fd, SIOCGIFFLAGS, (char *) &buf[interface]))) {

  61.                     if (buf[interface].ifr_flags & IFF_PROMISC) {

  63.                         printf("the interface is PROMISC");

  65.                         retn ;

  67.                     }

  69.                 } else {

  71.                     char str[256] = "";

  73.  

  75.                     sprintf(str, "cpm: ioctl device %s",

  77.                             buf[interface].ifr_name);

  79.                     perror(str);

  81.                 }

  83.  

  85. /*Jugde whether the net card status is up */

  87.                 if (buf[interface].ifr_flags & IFF_UP) {

  89.                     printf("the interface status is UP\n");

  91.                 } else {

  93.                     printf("the interface status is DOWN\n");

  95.                 }

  97.  

  99. /*Get IP of the net card */

  101.                 if (!(ioctl(fd, SIOCGIFADDR, (char *) &buf[interface]))) {

  103.                     printf("IP address is:");

  105.                     printf("%s\n",

  107.                            inet_ntoa(((struct sockaddr_in

  109.                                        *) (&buf[interface].ifr_addr))->

  111.                                      sin_addr));

  113.                 } else {

  115.                     char str[256] = "";

  117.  

  119.                     sprintf(str, "cpm: ioctl device %s",

  121.                             buf[interface].ifr_name);

  123.                     perror(str);

  125.                 }

  127.  

  129. /*Get HW ADDRESS of the net card */

  131.                 if (!(ioctl(fd, SIOCGIFHWADDR, (char *) &buf[interface]))) {

  133.                     printf("HW address is:");

  135.  

  137.                     sprintf(mac, "%02x%02x%02x%02x%02x%02x",

  139.                             (unsigned char) buf[interface].ifr_hwaddr.

  141.                             sa_data[0],

  143.                             (unsigned char) buf[interface].ifr_hwaddr.

  145.                             sa_data[1],

  147.                             (unsigned char) buf[interface].ifr_hwaddr.

  149.                             sa_data[2],

  151.                             (unsigned char) buf[interface].ifr_hwaddr.

  153.                             sa_data[3],

  155.                             (unsigned char) buf[interface].ifr_hwaddr.

  157.                             sa_data[4],

  159.                             (unsigned char) buf[interface].ifr_hwaddr.

  161.                             sa_data[5]); // sprintf×char *

  163.                     printf("%s\n", mac);

  165.  

  167.                     printf("\n");

  169.                 }

  171.  

  173.                 else {

  175.                     char str[256];

  177.  

  179.                     sprintf(str, "cpm: ioctl device %s",

  181.                             buf[interface].ifr_name);

  183.                     perror(str);

  185.                 }

  187.             } //end of while

  189.         } else

  191.             perror("cpm: ioctl");

  193.  

  195.     } else

  197.         perror("cpm: socket");

  199.  

  201.     close(fd);

  203.     return retn;

  205. }



  209. /********************************end********************************/



  213. /*±à: gcc get_ipmac.c



  217. : ./a.out



  221. á:



  225. interface num is interface=4

  227.  

  229. net device eth2

  231. the interface status is UP

  233. IP address is:192.168.100.48

  235. HW address is:00e04cd803ae

  237.  

  239. net device eth1

  241. the interface status is UP

  243. IP address is:192.168.60.48

  245. HW address is:000aeb5f92ce

  247.  

  249. net device eth0

  251. the interface status is UP

  253. IP address is:192.168.80.48

  255. HW address is:00d0b7b8b22e

  257.  

  259. net device lo

  261. the interface status is UP

  263. IP address is:127.0.0.1

  265. HW address is:000000000000*/
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