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获取mac地址c语言,C语言获取服务器mac地址

获取mac地址c语⾔,C语⾔获取服务器mac地址

Linux系统

六价铬在Linux系统，可以通过系统调⽤函数ioctl很容易就获取到服务器的mac地址。#include

#include

int main()

{

int sock, if_count, i;

struct ifconf ifc;

struct ifreq ifr[10];

unsigned char mac[6];

memset(&ifc, 0, sizeof(struct ifconf));

sock = socket(AF_INET, SOCK_DGRAM, 0);

ifc.ifc_len = 10 * sizeof(struct ifreq);

ifc.ifc_buf = (char *)ifr;

//获取所有⽹卡信息

ioctl(sock, SIOCGIFCONF, (char *)&ifc);

if_count = ifc.ifc_len / (sizeof(struct ifreq));

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for (i = 0; i < if_count; i++) {

if (ioctl(sock, SIOCGIFHWADDR, &ifr[i]) == 0) {

memcpy(mac, ifr[i].ifr_hwaddr.sa_data, 6);

printf("eth: %s, mac: %02x:%02x:%02x:%02x:%02x:%02x\n", ifr[i].ifr_name, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);

}

return 0;

}

核⼼逻辑主要分两个部分，第⼀个部分是获取⽹卡，主要通过下⾯的函数完成：ioctl(sock, SIOCGIFCONF, (char *)&ifc);

它的信息保存在结构体struct ifconf中，有可能不⽌⼀个。获取到的信息保存在ifc_buf中。

第⼆个逻辑就是根据⽹卡的名字去获取mac地址，主要⽤下⾯的函数完成：ioctl(sock, SIOCGIFHWA

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DDR, &ifr[i]);

通过上⾯简单的两步，就能获取到Linux服务器上所有的⽹卡对应的mac地址。

当前操作系统信息：[root@vm101108 src]# uname -a

Linux vm101108 3.10.0-1160.15.2.el7.x86_64 #1 SMP Wed Feb 3 15:06:38 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

[root@vm101108 src]# cat /etc/os-release

NAME="CentOS Linux"

VERSION="7 (Core)"

ID="centos"

ID_LIKE="rhel fedora"

VERSION_ID="7"

PRETTY_NAME="CentOS Linux 7 (Core)"

ANSI_COLOR="0;31"

CPE_NAME="cpe:/o:centos:centos:7"

HOME_URL="/"

BUG_REPORT_URL="/"

CENTOS_MANTISBT_PROJECT="CentOS-7"

CENTOS_MANTISBT_PROJECT_VERSION="7"

REDHAT_SUPPORT_PRODUCT="centos"

REDHAT_SUPPORT_PRODUCT_VERSION="7"

上⾯的程序运⾏结果：[root@vm101108 src]# ./get_mac_addr

eth: lo, mac: 00:00:00:00:00:00

eth: em1, mac: b8:2a:72:dc:42:f2

eth: p5p2, mac: 90:e2:ba:89:46:bd

eth: docker0, mac: 02:42:1c:d3:f8:e8

查看本地⽹卡的mac地址：[root@vm101108 src]# ifconfig

docker0: flags=4163 mtu 1500

inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255

inet6 fe80::42:1cff:fed3:f8e8 prefixlen 64 scopeid 0x20

ether 02:42:1c:d3:f8:e8 txqueuelen 0 (Ethernet)

RX packets 0 bytes 0 (0.0 B)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 5 bytes 446 (446.0 B)

朴泰俊TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

em1: flags=4163 mtu 1500

inet 192.168.102.108 netmask 255.255.255.0 broadcast 192.168.102.255

inet6 fe80::9f88:a3a9:1748:56fc prefixlen 64 scopeid 0x20

ether b8:2a:72:dc:42:f2 txqueuelen 1000 (Ethernet)

RX packets 4420019 bytes 547543658 (522.1 MiB)

RX errors 0 dropped 52 overruns 0 frame 0

TX packets 6526650 bytes 6637157039 (6.1 GiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

device interrupt 55

lo: flags=73 mtu 65536

inet 127.0.0.1 netmask 255.0.0.0

inet6 ::1 prefixlen 128 scopeid 0x10

loop txqueuelen 1000 (Local Loopback)

RX packets 140886 bytes 12507428 (11.9 MiB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 140886 bytes 12507428 (11.9 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

p5p2: flags=4163 mtu 1500

inet 192.168.101.108 netmask 255.255.255.0 broadcast 192.168.101.255

inet6 fe80::427c:e13c:50b6:d747 prefixlen 64 scopeid 0x20

ether 90:e2:ba:89:46:bd txqueuelen 1000 (Ethernet)

RX packets 57573979 bytes 50997944188 (47.4 GiB)

RX errors 0 dropped 41 overruns 0 frame 0

TX packets 1111442 bytes 673920374 (642.7 MiB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

可见，取出来的mac地址是正确的。

AIX系统

AIX系统是power架构的，没有SIOCGIFHWADDR这个接⼝，因此，不能像Linux那样获取mac地址。这⾥提供两种⽅法：

第⼀种⽅法#include

#include

#include /* for ifconf */

#include /* for sockaddr_in */

#include

static int aix_get_mac_addr(uint8_t mac[6])

{

struct ifconf ifc;

struct ifreq *ifr;

char buf[640] = "";

int sock = socket(AF_INET, SOCK_DGRAM, 0);

ifc.ifc_len = 640;

ifc.ifc_buf = buf;

if (sock < 0)

{

free(ifr);

return -1;

}

ioctl(sock, CSIOCGIFCONF, &ifc);

ifr = (struct ifreq *)buf;

struct sockaddr_dl *sdl = (struct sockaddr_dl *)&ifr->ifr_addr; memcpy(mac, ((caddr_t)((sdl)->sdl_data + (sdl)->sdl_nlen)), 6); close(sock);

free(ifr);

return 0;

}

void print_mac(uint8_t mac[6]){

printf("%02x:%02x:%02x:%02x:%02x:%02x\n",

mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);

拳皇13卡}

int main(void)

{

unsigned char mac[6];

if (aix_get_mac_addr(mac) == -1){

perror("aix_getmac");

}

print_mac(mac);

}

这种⽅法的核⼼逻辑是通过ioctl(sock, SIOCGIFCONF, &ifc)取出⽹卡信息后，将其地址强转成struct sockaddr_dl类型。当前操作系统：-bash-4.3# uname -a

AIX localhost 1 6 00C553DC4C00

-bash-4.3# oslevel

6.1.0.0

以上代码在AIX系统下运⾏结果：-bash-4.3# ./mac1

00:11:25:c5:97:cc

查看系统⽹卡：-bash-4.3# netstat -in

Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll

en0 1500 link#2 0.11.25. 127705533 0 1124424 3 0

en0 1500 192.168.21 192.168.21.216 127705533 0 1124424 3 0

lo0 16896 link#1 1787514 0 1709788 0 0

lo0 16896 127 127.0.0.1 1787514 0 1709788 0 0

lo0 16896 ::1%1 1787514 0 1709788 0 0

可见，取出来的mac地址是正确的。

第⼆种⽅法#include

#include

唧唧复唧唧#include

#include

#include /* for ifconf */

#include /* for sockaddr_in */

#include

get ethernet MAC address on AIX

static int aix_get_mac_addr(uint8_t mac[6])

本文发布于:2024-09-21 22:08:21，感谢您对本站的认可！

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