LINUX get IP address and MAC address __linux

Source: Internet
Author: User
Tags get ip sprintf

#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h> #include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <net/if_arp.h> #ifdef SOLARIS
#include <sys/sockio.h>
#endif #define Maxinterfaces Main (argc, argv)
register int argc;
Register Char *argv[];
Register int FD, intrface, retn = 0;
struct Ifreq buf[maxinterfaces];
struct Arpreq ARP;
struct ifconf ifc; if (FD = socket (af_inet, SOCK_DGRAM, 0)) >= 0)
Ifc.ifc_len = sizeof buf;
Ifc.ifc_buf = (caddr_t) buf;
if (!ioctl (FD, siocgifconf, (char *) &AMP;IFC)
Get interface Information
Intrface = ifc.ifc_len/sizeof (struct ifreq);
printf ("Interface num is intrface=%d\n\n\n", intrface);
Get device IP and MAC address based on the pretext information loop
while (intrface--> 0)
Get device Name
printf ("NET device%s\n", buf[intrface].ifr_name);

To determine the type of network card
if (!) ( IOCTL (FD, Siocgifflags, (char *) &buf[intrface]))
if (Buf[intrface].ifr_flags & Iff_promisc)
Puts ("The interface is Promisc");
Char str[256]; sprintf (str, "Cpm:ioctl device%s", buf[intrface].ifr_name);
Perror (str);
}//Determine NIC status
if (Buf[intrface].ifr_flags & iff_up)
Puts ("The interface status is up");
Puts ("The interface status is down");
//Get the IP address of the current network card
if (!) ( IOCTL (FD, SIOCGIFADDR, (char *) &buf[intrface]))
Puts ("IP address is:");
Puts (Inet_ntoa (struct sockaddr_in*) (&buf[intrface].ifr_addr)) (-&GT;SIN_ADDR));
Puts ("");
Puts (buf[intrface].ifr_addr.sa_data);
Char str[256]; sprintf (str, "Cpm:ioctl device%s", buf[intrface].ifr_name);
Perror (str);
/* This section can ' t get hardware address,i don ' t know whether the reason is module driver*/
#ifdef SOLARIS
Get MAC Address
arp.arp_pa.sa_family = af_inet;
arp.arp_ha.sa_family = af_inet;
((struct sockaddr_in*) &arp.arp_pa)->sin_addr.s_addr= ((struct sockaddr_in*) (&buf[intrface].ifr_addr))- >sin_addr.s_addr;
if (!) ( IOCTL (FD, SIOCGARP, (char *) &arp))
Puts ("HW address is:"); Display MAC address in hexadecimal
printf ("%02x:%02x:%02x:%02x:%02x:%02x\n",
(unsigned char) arp.arp_ha.sa_data[0],
(unsigned char) arp.arp_ha.sa_data[1],
(unsigned char) arp.arp_ha.sa_data[2],
(unsigned char) arp.arp_ha.sa_data[3],
(unsigned char) arp.arp_ha.sa_data[4],
(unsigned char) arp.arp_ha.sa_data[5]); Puts ("");
Puts ("");
#if 0
/*get HW Address for the net card * *
if (!) ( IOCTL (FD, SIOCGENADDR, (char *) &buf[intrface]))
Puts ("HW address is:"); printf ("%02x:%02x:%02x:%02x:%02x:%02x\n",
(unsigned char) buf[intrface].ifr_enaddr[0],
(unsigned char) buf[intrface].ifr_enaddr[1],
(unsigned char) buf[intrface].ifr_enaddr[2],
(unsigned char) buf[intrface].ifr_enaddr[3],
(unsigned char) buf[intrface].ifr_enaddr[4],
(unsigned char) buf[intrface].ifr_enaddr[5]); Puts ("");
Puts ("");
if (!) ( IOCTL (FD, SIOCGIFHWADDR, (char *) &buf[intrface]))
Puts ("HW address is:"); printf ("%02x:%02x:%02x:%02x:%02x:%02x\n",
(unsigned char) buf[intrface].ifr_hwaddr.sa_data[0],
(unsigned char) buf[intrface].ifr_hwaddr.sa_data[1],
(unsigned char) buf[intrface].ifr_hwaddr.sa_data[2],
(unsigned char) buf[intrface].ifr_hwaddr.sa_data[3],
(unsigned char) buf[intrface].ifr_hwaddr.sa_data[4],
(unsigned char) buf[intrface].ifr_hwaddr.sa_data[5]); Puts ("");
Puts ("");
#endif Else
Char str[256]; sprintf (str, "Cpm:ioctl device%s", buf[intrface].ifr_name);
Perror (str);
} else
Perror ("Cpm:ioctl"); } else
Perror ("Cpm:socket"); Close (FD);
return RETN;
Compile: GCC filename

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