Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

How to get my pc's ip?

Posted on 2006-07-16
1
Medium Priority
?
186 Views
Last Modified: 2013-11-20
I am using ADSL connection, the ip may change, my program need to check for fixed time interval of the pc's ip.The OS is xp
Is there any sample code?

Then I need to write it to a log file and write to DB.

Thx
0
Comment
Question by:turbot_yu
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 86

Accepted Solution

by:
jkr earned 2000 total points
ID: 17117464
This is pretty straightfoward using 'gethostbyname()' with your local name, e.g.

  char                szErrorMessage[ 129 ];
  char                szLocalHostName[ 129 ];
  unsigned long       ulInetAddr;
  struct sockaddr_in  sin;
  struct hostent      *pHostEnt;
  int                 nRC;

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

  nRC = gethostname( szLocalHostName, sizeof( szLocalHostName ) );

  if ( nRC == -1 )
    {
    sprintf( szErrorMessage, "gethostname() failed.  errno=[%d]", errno);

    perror( szErrorMessage );

    exit( EXIT_FAILURE );
    } // end if

  fprintf( stdout, "gethostname() returned %d characters.\n", nRC );
  fprintf( stdout, "  Name        = [%s]\n", szLocalHostName );

  if ( ( ulInetAddr = inet_addr( szLocalHostName ) ) == ((unsigned long)-1L) )
    {
    if ( ( pHostEnt = gethostbyname( szLocalHostName ) ) == NULL )
      {
      sprintf( szErrorMessage, "gethostbyname() failed.  errno=[%d]",errno );

      perror( szErrorMessage );

      exit( EXIT_FAILURE );
      } // end if

    memcpy( (char *)&sin.sin_addr, (char *)pHostEnt->h_addr,pHostEnt->h_length);
    }
  else
    {
    memcpy( (char *)&sin.sin_addr, (char *)&ulInetAddr, sizeof(ulInetAddr ));

  } // end if

  fprintf( stdout, "  Dot Address = [%s]\n", inet_ntoa( sin.sin_addr ) );

  WSAShutdown();

0

Featured Post

Survive A High-Traffic Event with Percona

Your application or website rely on your database to deliver information about products and services to your customers. You can’t afford to have your database lose performance, lose availability or become unresponsive – even for just a few minutes.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
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.
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…

715 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