linux 网络编程---域名解析

原创于 2017-05-09 15:42:12 发布 · 255 阅读

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文章标签：

#c语言 #linux #网络 #编程 #网络编程

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引入我的代码片：

#include
#include
#include
#include
#include
#include
int main(int argc,char **argv)
{
	struct hostent *host;
	char **p;
	char src[32];
	if(argc<2)
	{
		printf("Pleasee intput addr:(like www.google.com)\n");
		return -1;
	}
	host=gethostbyname(argv[1]);
	if(host==NULL)
	{
		printf("gethostbyname error!\n");
		return -1;
	}
	else
	{
		printf("host-->name:%s\n",host->h_name);
		if(host->h_addrtype==AF_INET)
		{
			printf("host type:AF_INET\n");
		}
		else
			printf("The host type don't know!\n");
		printf("host length-->length:%d\n",host->h_length);
		p=host->h_aliases;
		for(;*p!=NULL;p++)
		{
			printf("host-->aliases:%s\n",*p);
		}
		p=host->h_addr_list;
		for(;*p!=NULL;p++)
		{
			//printf("host-->ip:%s\n",*p);
			printf("host-->ip:%s\n",inet_ntop(AF_INET,*p,src,sizeof(src)));
			//printf("host-->ip:%s\n",inet_ntop(host->h_addrtype,*p,NULL,32);
		}
		
	}
		
	
			
}

运行结果：