C++ 将 ifaddrs struct 中的 IPv4 地址分配给 sockaddr_in struct

我正在开发UDP服务器应用程序.
我希望将我的服务器套接字绑定到特定的接口(从配置文件读取).在本例中为eth0.
我正在使用getifaddrs读取有关当前网络接口的所有信息.
然后，我遍历返回getifaddrs的链表，并对照我想要的接口判断每个接口的名称.
一旦找到匹配项，我计划从struct ifaddrs中提取IPv4地址并将其分配给struct sockaddr_in对象.
目前，我不确定如何才能通过struct ifaddrs->ifa_addr->sa_data到struct sockaddr_in.sin_addr.s_addr，或者这是我正在遵循的正确/推荐的方法.

代码:

bool start_server(void)
{
    struct sockaddr_in  server_address;
    struct ifaddrs      *ifaddr;
    int                 return_value;
    try
    {
        this->sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
        if (this->sock_fd < 0) 
        {
            //TODO : Log Error
            return false;
        }

        // Initialize and configure struct sockaddr_in server_address
        std::memset(&server_address, sizeof(sockaddr_in), 0); // Initialize struct sockaddr_in server_address to 0
        server_address.sin_family = AF_INET;
        server_address.sin_port = htons(6666); //We are using the port 6666

        //Get IP address from the interface (eth0 currently) -> Interface name to be read from the configuration file
        return_value = getifaddrs(&ifaddr);
        if (return_value < 0) //On error, -1 is returned
        {
            //TODO : Log Error
            return false;
        }
        for (struct ifaddrs *ifa; ifa != nullptr; ifa = ifaddr->ifa_next)//ifa stand for interface address
        {
            if (std::strcmp(ifa->ifa_name, "eth0") == 0) //We check the interface name in the linked Strings are exact match
            {
                if (ifa->ifa_addr == nullptr)
                {
                    //TODO : Log Error - Selected interface doesn't have an assoiciated IP address
                    break; 
                }
                else
                {
                    server_address.sin_addr.s_addr = inet_addr(ifa->ifa_addr->sa_data); //I am unsure will this work or if this is the right approach
                    break;
                }

            }
        }
        freeifaddrs(ifaddr); //Free up memeory allocated by getifaddrs. Prevents Memory Leaks
}