linux获取本机MAC/IP地址的方法-创新互联

功能：查询本机IP/MAC地址，过滤掉127.0.0.1 loop-back 地址

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适用：linux, ubuntu 16.04 调试通过

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include

void getLocalMacIp()

{

   int i;
   int sock_mac;
    char hname[128];
    struct hostent *hent;
   struct in_addr *paddr = 0;
    struct ifaddrs * ifAddrStruct=NULL;
   struct ifreq ifr_mac;
    void * tmpAddrPtr=NULL;

   struct ifreq buf[16];
    struct ifconf ifc;
    int interface_num;
    char nif_name[128] = {0};
    char addressBuffer[128];

   unsigned char macaddr[6] = {0};
    unsigned char *pFirstByte;

    //---------------------------------------------
   //get device IP address, discard loopback
   //---------------------------------------------
    gethostname(hname, sizeof(hname));

   hent = gethostbyname(hname);

   printf("[%s][%d] host: %s\n", __FILE__, __LINE__, hent->h_name);

    getifaddrs(&ifAddrStruct);

    while (ifAddrStruct!=NULL)
   {
        if (ifAddrStruct->ifa_addr->sa_family==AF_INET)
       {
            tmpAddrPtr = &((struct sockaddr_in *)ifAddrStruct->ifa_addr)->sin_addr;
           pFirstByte = (unsigned char*)tmpAddrPtr;

            if(*pFirstByte != 127)
           {
               paddr = tmpAddrPtr;
                inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, 128);
               printf("[%s][%d] NIF %s address %s\n", __FILE__, __LINE__,
                   ifAddrStruct->ifa_name, addressBuffer);
                //---------------------------------------------
               //remember NIF name for future use
               //---------------------------------------------
                strcpy(nif_name, ifAddrStruct->ifa_name);
           }

        }

        ifAddrStruct=ifAddrStruct->ifa_next;
    }

   //---------------------------------------------
   //get device MAC address, discard loopback
   //---------------------------------------------
   sock_mac = socket( AF_INET, SOCK_DGRAM, 0 );

   if(sock_mac > 0)
   {
        ifc.ifc_len = sizeof(buf);
        ifc.ifc_req = buf;
       ioctl(sock_mac, SIOCGIFCONF, (char *)&ifc);

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

        while(interface_num--)
        {
           if(nif_name[0] && strcmp(nif_name, buf[interface_num].ifr_name))
           {
               continue;
           }

            ioctl(sock_mac, SIOCGIFHWADDR, (char *)&buf[interface_num]);

           memcpy(macaddr, &buf[interface_num].ifr_hwaddr.sa_data[0], 6);

            //printf("NIF %s ", buf[interface_num].ifr_name);
            //printf("mac %02x:%02x:%02x:%02x:%02x:%02x \n",
           //   macaddr[0], macaddr[1], macaddr[2], macaddr[3], macaddr[4], macaddr[5]);
        }

       close( sock_mac );
   }
}

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linux获取本机MAC/IP地址的方法-创新互联

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