取得域名的IP

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取得域名的IP
编写一个简易的取得域名的IP代码（内容绝对可靠）



dewboy发表于 12 小时前 | 只看该作者
#include "stdio.h"
#include "sys/socket.h"
#include "netdb.h"

int main(int argc,char *argv[])
{
struct hostent *host;
char hostname[]="www.163.com";
char hostname2[]="www.xiaoxiaowanruo.com";
struct in_addr in;
struct sockaddr_in addr_in;
extern int h_errno;

if((host=gethostbyname(hostname))!=NULL)
{
memcpy(&addr_in.sin_addr.s_addr,host->h_addr,4);
in.s_addr=addr_in.sin_addr.s_addr;
printf("Domain name:%s \n",hostname);
printf("IP length: %d \n",host->h_length);
printf("Type: %d \n ",host->h_addrtype);
printf("IP :%s \n",inet_ntoa(in));
}
else
{
printf("Domain name: %s \n",hostname);
printf("error: %d \n ",h_errno);
printf("%s\n",hstrerror(h_errno));
}

if((host=gethostbyname(hostname2))!=NULL)
{
memcpy(&addr_in.sin_addr.s_addr,host->h_addr,4);
in.s_addr=addr_in.sin_addr.s_addr;
printf("Domain name:%s \n",hostname2);
printf("IP length: %d \n",host->h_length);
printf("Type: %d \n ",host->h_addrtype);
printf("IP :%s \n",inet_ntoa(in));
}
else
{
printf("Domain name: %s \n",hostname2);
printf("error: %d \n ",h_errno);
printf("%s\n",hstrerror(h_errno));
}
}







只看该作者 仍有疑问，在解析www.xiaoxiaowanruo.com时，返回的ip地址为125.211.213.133 。如果把www.xiaoxiaowanruo.com 改为
www.liumingyue.com，结果仍未变，这是为什么？