?
Solved

Internet Addresses in MFC

Posted on 1998-11-14
3
Medium Priority
?
200 Views
Last Modified: 2013-11-20
How would I go about taking a string (like "www.microsoft.com") and converting it into the dotted decimal system (like 127.0.0.1). Java has the function .getByName(), but I don't see that anywhere in VC++ 66.0. Any suggestions? TIA, Matt Lesko
0
Comment
Question by:MattLesko
  • 2
3 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 100 total points
ID: 1324705
Use the Winsock function 'gethostbyname()'. It returns a 'struct HOSTENT' which has a member called 'h_addr' that holds the IP in binary form (network byte order!). If you need an example how to use it, feel free to ask...
0
 

Author Comment

by:MattLesko
ID: 1324706
Sorry, but being new at this, I'd like to request a sample.
0
 
LVL 86

Expert Comment

by:jkr
ID: 1324707
No problem ;-)
Here's your example:

WORD            wVersionRequested;
WSADATA            wsaData;
struct hostent      *pHostent = NULL;      
 
wVersionRequested = MAKEWORD( 1, 1);

if ( nErr = WSAStartup ( wVersionRequested, &wsaData))
{
  // error initializing winsck...      
}


if (!(pHostent = gethostbyname ( "www.microsoft.com")))
{
 // an error occured...
}
else
{
 printf ( "IP: %s\n", BinIP2StrIP ( *(( long *)  pHostent->h_addr));
}


char *BinIP2StrIP ( long lnIP)
{
static char s_acStrIP [      16];

PUCHAR      puc = ( unsigned char *) &lnIP;
unsigned int aun [ 4];

for ( int i = 0; i < 4; aun [ i++] = *puc++);

sprintf      ( s_acStrIP, "%d.%d.%d.%d", aun [ 0], aun [ 1], aun [ 2], aun [ 3]);

return ( s_acStrIP);
}
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Watch the video of Kernel Migrator for SharePoint, which demonstrate the process easily of migration from SharePoint to SharePoint, OneDrive for Business & Google Drive servers, Public Folder to SharePoint, File Server to SharePoint. The tool has va…

579 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question