ip地址可以写域名吗

Question

 memcpy(ip,"www.yycred.com\r\n ",strlen("www.yycred.com\r\n "));                               //这里我把ip地址改为域名可以吗
  port = 21;

 client = new ftpClient(ip,port);

Answer 1

....这是什么转法？

memcpy把 换行传过去了？ 这个问题大了 。。。地址信息不要有 换行。

不可以，但是如果你是参数的话，参数传递域名 在函数内部通过 getsockbyname  来转成IP地址。

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…|▌'寔堅蔃の/「≯還寔╪.逞蔃﹖

Answer 2

可以将域名转成IP地址，试试用gethostbyname()函数

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Visual C++ enthusiast, like network programming and driver development. At present is being engaged in the WinCE/Windows Mobile platform embedded development.

Answer 3

 WSADATA wsa;
WSAStartup(0x0101,&wsa);
struct sockaddr_in addr;
SOCKET s;
struct hostent* p=gethostbyname("www.yycred.com");
if(!p){
//m_status+="\r\nError get IP.";
return 0;
}
s=socket(AF_INET,SOCK_STREAM,0);
addr.sin_family=AF_INET;
addr.sin_port=htons(25);
addr.sin_addr.s_addr = *(unsigned long*)p->h_addr;

connect(s,/*IP*/(struct sockaddr*)&addr,sizeof(addr));
char **iip=p->h_addr_list;

 

 //cout<<"Please input the ip of the FTP server::";
 //memcpy(ip,p->h_addr_list,strlen("www.yycred.com"));
 cout<<"Do you want to change the port,Now the port is 21 :[Y/N]";
 port = 21;

 client = new ftpClient(**iip,port);              //1>c:\cprogram\sock_zxg\sock.cpp(173): error C2664: 'ftpClient::ftpClient(std::string,int)' : cannot convert parameter 1 from 'char' to 'std::string'

Answer 4

好了

memcpy(ip,inet_ntoa(addr.sin_addr),33);