LINUX下QT与C语言通过网卡名获取网卡IP与MAC

1、QT下

QString RuntimeConfig::ipAddress(QString network)
{
    QList<QNetworkAddressEntry> list;
    QString localIPaddress;

    QNetworkInterface interface = QNetworkInterface::interfaceFromName(network);
    list = interface.addressEntries();
    if (!list.isEmpty())
    {
        localIPaddress = list.at(0).ip().toString();
    }

    return localIPaddress;
}

QString RuntimeConfig::macAddress(QString network)
{
    QList<QNetworkInterface> netList;
    int netCount;
    int neti;
    QNetworkInterface myNet;
    netList = QNetworkInterface::allInterfaces();
    netCount = netList.count();

    for (neti = 0; neti < netCount; neti ++)
    {
        if (netList.at(neti).isValid() && netList.at(neti).name() == network)
        {
            myNet = netList.at(neti);
            break;
        }
    }
    return (myNet.hardwareAddress());
}

2、C语言下

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <arpa/inet.h>
#include <errno.h>

#include "getinfo.h"

int getip(char *ip, char *name)
{
    int sock;
    struct sockaddr_in sin;
    struct ifreq ifr;
    sock = socket(AF_INET, SOCK_DGRAM, 0);
    if (sock == -1)
    {
        perror("socket");
        return -1;
    }
    strncpy(ifr.ifr_name, name, IFNAMSIZ);
    ifr.ifr_name[IFNAMSIZ - 1] = 0;
    if (ioctl(sock, SIOCGIFADDR, &ifr) < 0)
    {
        perror("ioctl");
        return -1;
    }
    memcpy(&sin, &ifr.ifr_addr, sizeof(sin));
    sprintf(ip, "%s", inet_ntoa(sin.sin_addr));
    return 0;
}

int getmac(char *mac, char *name)
{
    struct ifreq ifreq;
    int   sock;

    if((sock=socket(AF_INET,SOCK_STREAM,0)) <0)
    {
        perror( "socket ");
        return   2;
    }
    strcpy(ifreq.ifr_name, name);
    if(ioctl(sock,SIOCGIFHWADDR,&ifreq) <0)
    {
        perror( "ioctl ");
        return   3;
    }
    sprintf(mac, "%02x:%02x:%02x:%02x:%02x:%02x",
            (unsigned char)ifreq.ifr_hwaddr.sa_data[0],
            (unsigned char)ifreq.ifr_hwaddr.sa_data[1],
            (unsigned char)ifreq.ifr_hwaddr.sa_data[2],
            (unsigned char)ifreq.ifr_hwaddr.sa_data[3],
            (unsigned char)ifreq.ifr_hwaddr.sa_data[4],
            (unsigned char)ifreq.ifr_hwaddr.sa_data[5]);
    return 0;
}