關(guān)于域名向ip地址的轉(zhuǎn)換

stuman

1. char *dest = "www.baidu.com";
   
2. struct hostent *ht=NULL;
   
3. ht = gethostbyname(dest);
   
4. unsigned int ip = *(unsigned long *)ht->h_addr_list[0];
   
5. 
   
6. struct sockaddr_in server_addr;
   
7. bzero(&server_addr,sizeof(server_addr));
   
8. server_addr.sin_family = AF_INET;
   
9. server_addr.sin_addr.s_addr = ip;
   
10. server_addr.sin_port = 80;
    
11. 
    
12.     if(connect(s,(struct sockaddr*)&server_addr,sizeof(struct sockaddr))){
    
13.         perror("connect");
    
14.         exit(1);
    
15.     }

復(fù)制代碼

以上代碼用于連接服務(wù)器，其中使用了gethostbyname函數(shù)進(jìn)行了主機(jī)名向IP地址的轉(zhuǎn)換，但是假如dest變量本來(lái)就是ip地址，例如：http://119.90.25.43，那么應(yīng)該怎么寫(xiě)呢？保持不變嗎？              

txchxl

man gethostbyname:
The gethostbyname() function returns a structure of  type  hostent  for  the given  host  name.   Here  name  is either a hostname, or an IPv4 address in standard dot notation (as for inet_addr(3)), or an  IPv6  address  in  colon (and  possibly  dot)  notation.