LINUX下获取网卡IP地址和MAC地址，子网掩码程序参考
/*
mode time:20120727
LINUX下获取IP地址和MAC地址.程序相关结构体在程序后面。
打印网卡的ip地址 子网掩码 广播地址 mac地址
环境：
[root@bogon temp]# uname -a
Linux bogon 2.6.31.5-127.fc12.i686.PAE #1 SMP Sat Nov 7 21:25:57 EST 2009 i686 i686 i386 GNU/Linux
*/
#include
#include
#include
#include
#include
#include
#include
#include
#ifdef SOLARIS
#include
#endif
#define MAXINTERFACES 16 /* 最大接口数 */
int main(int argc, char **argv)
{
register int fd, intrface, retn = 0;
struct ifreq buf[MAXINTERFACES]; /* ifreq结构数组 */
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 *) &ifc))
{
//获取接口数量信息
intrface = ifc.ifc_len / sizeof (struct ifreq);
printf("interface num is intrface=%d\n",intrface);
puts("");
//根据借口信息循环获取设备IP和MAC地址
while ( (intrface--) > 0)
{
//获取设备名称
printf ("net device %s\n", buf[intrface].ifr_name);
//判断网卡类型
if (!(ioctl (fd, SIOCGIFFLAGS, (char *) &buf[intrface])))
{
if (buf[intrface].ifr_flags & IFF_PROMISC)
{
puts ("the interface is PROMISC");
retn++;
}
}
else
{
char str[256];
sprintf (str, "cpm: ioctl device %s", buf[intrface].ifr_name);
perror (str);
}
//判断网卡状态
if (buf[intrface].ifr_flags & IFF_UP)
{
puts("the interface status is UP");
}
else
{
puts("the interface status is DOWN");
}
//获取当前网卡的IP地址
if (!(ioctl (fd, SIOCGIFADDR, (char *) &buf[intrface])))
{
printf("IP address is:");
puts((char *)inet_ntoa(((struct sockaddr_in*)(&buf[intrface].ifr_addr))->sin_addr));
//printf("\n%d\n"buf[intrface].ifr_addr))->sin_addr.s_addr);
//puts (buf[intrface].ifr_addr.sa_data);
}
else
{
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
//获取MAC地址
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)))
{
printf("HW address is:");
//以十六进制显示MAC地址
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("");
}
#else
#if 0
/*Get HW ADDRESS of the net card */
if (!(ioctl (fd, SIOCGENADDR, (char *) &buf[intrface])))
{
printf("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("");
}
#endif
if (!(ioctl (fd, SIOCGIFHWADDR, (char *) &buf[intrface])))
{
printf("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]);
}
#endif
else
{
char str[256];
sprintf (str, "cpm: ioctl device %s", buf[intrface].ifr_name);
perror (str);
}
//子网掩码
if (!(ioctl(fd, SIOCGIFNETMASK, (char *) &buf[intrface])))
{
printf("MASK:%s",
(char*)inet_ntoa(((struct sockaddr_in*) (&buf[intrface].ifr_addr))->sin_addr));
puts("");
}
else
{
char str[256];
sprintf(str, "SIOCGIFADDR ioctl %s", buf[intrface].ifr_name);
perror(str);
}
//广播地址
if (! (ioctl(fd, SIOCGIFBRDADDR, (char *) &buf[intrface])))
printf("Broadcast Address:%s\n",
(char*)inet_ntoa(((struct sockaddr_in*) (&buf[intrface].ifr_addr))->sin_addr));
puts("");
puts("");
} //while
} else
perror ("cpm: ioctl");
} else
perror ("cpm: socket");
close (fd);
return retn;
}
/*
#include
int ioctl(int fd, int request, … * void *arg *);
返回：成功返回0，失败返回-1
char *inet_ntoa (struct in_addr);
返回点分十进制的字符串在静态内存中的指针。
所在头文件： 函数功能：将网络地址转换成“.”点隔的字符串格式。
所需库： winsock.h
#include
struct ifconf
{
int ifc_len; /* size of buffer *
union
{
char __user *ifcu_buf;
struct ifreq __user *ifcu_req;
} ifc_ifcu;
};
struct ifreq
{
#define IFHWADDRLEN 6
union
{
char ifrn_name[IFNAMSIZ]; * if name, e.g. "en0" *
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size *
char ifru_newname[IFNAMSIZ];
void __user * ifru_data;
struct if_settings ifru_settings;
} ifr_ifru;
};
#define ifr_name ifr_ifrn.ifrn_name /* interface name *
#define ifr_hwaddr ifr_ifru.ifru_hwaddr /* MAC address *
#define ifr_addr ifr_ifru.ifru_addr /* address *
#define ifr_dstaddr ifr_ifru.ifru_dstaddr /* other end of p-p lnk *
#define ifr_broadaddr ifr_ifru.ifru_broadaddr /* broadcast address *
#define ifr_netmask ifr_ifru.ifru_netmask /* interface net mask *
#define ifr_flags ifr_ifru.ifru_flags /* flags *
#define ifr_metric ifr_ifru.ifru_ivalue /* metric *
#define ifr_mtu ifr_ifru.ifru_mtu /* mtu *
#define ifr_map ifr_ifru.ifru_map /* device map
#define ifr_slave ifr_ifru.ifru_slave /* slave device *
#define ifr_data ifr_ifru.ifru_data /* for use by interface *
#define ifr_ifindex ifr_ifru.ifru_ivalue /* interface index
#define ifr_bandwidth ifr_ifru.ifru_ivalue /* link bandwidth *
#define ifr_qlen ifr_ifru.ifru_ivalue /* Queue length *
#define ifr_newname ifr_ifru.ifru_newname /* New name *
#define ifr_settings ifr_ifru.ifru_settings /* Device/proto settings*
*/ [root@bogon temp]# ./get_ip
interface num is intrface=2
net device eth1
the interface status is UP
IP address is:192.168.94.125
HW address is:00:0c:29:26:e4:f2
MASK:255.255.255.0
Broadcast Address:192.168.94.255
net device lo
the interface status is UP
IP address is:127.0.0.1
HW address is:00:00:00:00:00:00
MASK:255.0.0.0
Broadcast Address:0.0.0.0