c - C 将 sockaddr 转换为 sockaddr_in

Question

由于某些原因，我的指针需要指向 sockaddr 而不是 sockaddr_in，我如何转换这两个结构以便将 sin_family、sin_pot 和 sin_addr 与 sockaddr 指针一起使用？这是我的代码

static int proxy_getaddr(char *HostName, int Port, SockAddrType *Result)
      .......

Result->sin_family=AF_INET;
Result->sin_port=htons((unsigned short)Port);
     ........

memcpy((char*)&Result->sin_addr,(char*)Host->h_addr,sizeof(Result->sin_addr));

如您所见，我需要转换的指针是这里的结果，我的控制台错误是

 ‘const struct sockaddr’ has no member named ‘sin_family’
 ‘const struct sockaddr’ has no member named ‘sin_port’
‘const struct sockaddr’ has no member named ‘sin_addr’