function needed to convert hostname to ipaddress

Hi ,
I am writing a program for ping that should support both IPv4 and IPv6 .. i wrote the prog as such the dot ( . ) and colon ( :) is searched and variation is found out ...

My question is " if a host name is given , how to convert it in to a ip address " .. Is there any function to convert it .. i am working on windows APIs and VC++ ...

Thanks ,
Chaitanya

Hi sankris,

try "getaddrinfo" ( WinSock 2 ).
For details see the MSDN or ask again.

Hope this helps,
Matze

gethostbyname()

Quote:

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Originally Posted by NoHero

gethostbyname()

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Sure, but Microsoft says in MSDN:

Note The gethostbyname function has been deprecated by the introduction of the getaddrinfo function. Developers creating Windows Sockets 2 applications are urged to use the getaddrinfo function instead of gethostbyname.

So if you want to stay compatible use "getaddrinfo()".

Greetings,
Matze

try this code:

Code:

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  WORD wVersionRequested;
  WSADATA wsaData;
  int err;
  wVersionRequested = MAKEWORD( 2, 2 );
  err = WSAStartup( wVersionRequested, &wsaData );

  char    Hostname[100];
  HOSTENT *pHostEnt;
  int  **ppaddr;
  SOCKADDR_IN sockAddr;
  CString addr;

  pHostEnt = gethostbyname( "www.codeguru.com");
  ppaddr = (int**)pHostEnt->h_addr_list;
  sockAddr.sin_addr.s_addr = **ppaddr;
  addr = inet_ntoa(sockAddr.sin_addr);  //this is your ip address

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Cheers

Quote:

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Originally Posted by matze42

Sure, but Microsoft says in MSDN:

Note The gethostbyname function has been deprecated by the introduction of the getaddrinfo function. Developers creating Windows Sockets 2 applications are urged to use the getaddrinfo function instead of gethostbyname.

So if you want to stay compatible use "getaddrinfo()".

Greetings,
Matze

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This deprecation is irrelevant because gethostbyname() has to work of course of BSD socket compatibility. Use what you want.