getnameinfo()编译时错误-在Linux中提取MAC地址

所有机器都在内部网络上。 我已经提取了我的套接字的IP,我正在尝试提取硬件地址。

我的策略:

1. 使用提取套接字的IP getsockname() 系统调用。
2. 使用 getifaddrs() 列出所有可用网络接口的系统调用。在我使用的for循环中 getnameinfo() 系统调用以查找当前迭代接口名称的IP,然后将此IP与套接字IP(从步骤1中提取)进行比较,以查找所连接套接字的接口名称。
3. ioctl(fd, SIOCGIFHWADDR, &ifr) 系统调用以使用在第2阶段中找到的接口名称获取硬件地址。

getnameinfo() 系统调用。

如果我不将第一个参数强制转换为(struct sockaddr\u in*),则会出现以下错误: ai_family not supported

getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST,
                           NULL, 0, NI_NUMERICHOST);

如果我将第一个参数强制转换为(struct sockaddr\u in*),则会出现以下错误: error: cannot convert ‘sockaddr_in*’ to ‘const sockaddr*’ for argument ‘1’ to ‘int getnameinfo(const sockaddr*, socklen_t, char*, socklen_t, char*, socklen_t, int)’

NULL,0,NI_NUMERICHOST);

bool Ethernet::getIp(void)
{
    struct      sockaddr_in addr;
    char        bufferIp[INET_ADDRSTRLEN];
    socklen_t   addrLen = sizeof(addr);
    if(getsockname(this->clientSocket, (struct sockaddr*) &addr, &addrLen) == -1)
    {
        string errStr = strerror(errno);
        FileOperations fo;
        string str;
        str = "Unable to extract IP address of socket";
        str += " Error : " + errStr;
        fo.printError(str);
        return RETURN_FAILURE;
    }

    if(inet_ntop(AF_INET, &addr.sin_addr, bufferIp, INET_ADDRSTRLEN) == NULL)
    {
        string errStr = strerror(errno);
        FileOperations fo;
        string str;
        str = "Unable to convert extracted IP address from binary to char* in Ethernet::getInterfaceDetails.";
        str += " Error : " + errStr;
        fo.printError(str);
        return RETURN_FAILURE;
    }
    this->ip = string(bufferIp);
    return RETURN_SUCCESS;
}

bool Ethernet::getMac(void)
{
    int fd;
    struct ifreq ifr;
//    char *iface = "eth0";
    unsigned char *mac;
    fd = socket(AF_INET, SOCK_DGRAM, 0);
    ifr.ifr_addr.sa_family = AF_INET;
    strncpy(ifr.ifr_name , this->interfaceName.c_str(), IFNAMSIZ-1);
    ioctl(fd, SIOCGIFHWADDR, &ifr);
    close(fd);
    mac = (unsigned char *)ifr.ifr_hwaddr.sa_data;

    //display mac address
    printf("Mac : %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n" , mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
    return RETURN_SUCCESS;

}

bool Ethernet::getInterfaceDetails(void)
{
    struct ifaddrs *ifaddr, *ifa;
    int s;
    char host[NI_MAXHOST];
    string tempAddr;
    char   buffer[INET_ADDRSTRLEN];
    if (getifaddrs(&ifaddr) == -1) 
    {
        string errStr = strerror(errno);
        FileOperations fo;
        string str;
        str = "System call 'getifaddrs' failed in Ethernet::getInterfaceDetails.";
        str += " Error : " + errStr;
        fo.printError(str);
        return RETURN_FAILURE;
    }

    for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next)
    {
        if (ifa->ifa_addr == NULL)
            continue;

        this->interfaceName = string(ifa->ifa_name);
        if(this->interfaceName == string("lo"))
            continue;

         s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST,
                           NULL, 0, NI_NUMERICHOST);

        if(s != 0)
        {
            string errStr = gai_strerror(s);
            cout << "Error : " << errStr << endl;
            FileOperations fo;
            string str;
            str = "Unable to convert extracted IP address address from binary to char* in Ethernet::getInterfaceDetails.";
            str += " Error : " + errStr;
            fo.printError(str);
            return RETURN_FAILURE;
        }
        tempAddr = string(host);      
        if(tempAddr == this->ip)
        {
            freeifaddrs(ifaddr);
            return RETURN_SUCCESS;
        }
    }
    return RETURN_FAILURE;
}