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DWORD GetLocalAddr(char* interface)
{
 struct ifreq ifr;
    int fd;
    int err;
    unsigned long ip;
    strcpy(ifr.ifr_name, interface);
    fd = socket(AF_INET, SOCK_DGRAM, 0);
    err = ioctl(fd, SIOCGIFADDR, &ifr);
    if (err)
    {
     //perror("ioctl");
     close(fd);
        return 0;
    }
    close(fd);
    memcpy(&ip,ifr.ifr_addr.sa_data + 2,4);
    return ip;
}
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DWORD ip=GetLocalAddr("eth0");


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