c - 绑定(bind)失败 : : Address family not supported by protocol family - C

Question

我在主函数中声明了一个struct sockaddr_in server。

我将它传递给这个函数以返回一个套接字文件描述符

int openSocket(char* ip_addr, int port, struct sockaddr_in* server){

    int sockfd, len;

    sockfd = socket(AF_INET, SOCK_DGRAM, 0);

    if(sockfd < 0){
        perror("Failed to open socket: ");
        exit(-1);
    }

    len = sizeof(server);
    bzero(server, len);
    server->sin_family= AF_INET;
    inet_pton(AF_INET, ip_addr, &server->sin_addr);
    server->sin_port= htons(port);

    if((bind(sockfd, (struct sockaddr*)&server, len)) < 0){
        perror("Bind failed: ");
        exit(-1);
    }
    return sockfd;

}

使用此调用将结构传递给函数

sockfd = openSocket(vector->ip_addr, vector->port, &server);

但是我得到以下错误。

 Bind failed: : Address family not supported by protocol family

Answer 1

  len = sizeof(server);

这决定了指针的大小。你想要它指向的结构的大小，所以这应该是:

  len = sizeof(*server);