MFC, Obtaining your IP Address

Benjamin Carte
#1 / 3

Obtaining your IP Address

I was wondering if anyone knows how to obtain the local IP address of a
machine. Is there a Winsock function to do this? (and I'm not talking about
using winipcfg, I want to be able to do what winipcfg does)

Thanks,
Ben

Wed, 10 Jan 2001 03:00:00 GMT

Vijayaraghavan
#2 / 3

Obtaining your IP Address

Hi Benjamin,

You may try this piece of code to obtain the IP address of your machine.

////////////////////////////////////////////////////////////////////////////
/////
char Hostname[100];
HOSTENT *pH;
int **addr1;
SOCKADDR_IN sock;
CString addr;
gethostname(Hostname,sizeof(Hostname));
pH = gethostbyname(Hostname);
addr1 = (int**)pH->h_addr_list;
sock.sin_addr.s_addr = **addr1;
addr = inet_ntoa(sock.sin_addr);//this is your ip address

////////////////////////////////////////////////////////////////////////////
///

Hope this helps you

Regards
Vijayaraghavan A
Aditi Technologies

http://www.aditi.com

Quote:

>I was wondering if anyone knows how to obtain the local IP address of a
>machine. Is there a Winsock function to do this? (and I'm not talking about
>using winipcfg, I want to be able to do what winipcfg does)

>Thanks,
>Ben

Thu, 11 Jan 2001 03:00:00 GMT

Joe Programme
#3 / 3

Obtaining your IP Address

Quote:

> I was wondering if anyone knows how to obtain the local IP address of a
> machine. Is there a Winsock function to do this? (and I'm not talking about
> using winipcfg, I want to be able to do what winipcfg does)

> Thanks,
> Ben

You want to look at WSAStartup and gethostname:

HOSTENT * Host;
WSADATA wsaData;
char Str[128];

WSAStartup( MAKEWORD(2,0), &wsaData );
gethostname ( Str, sizeof(Str) );
Host = gethostbyname ( Str );
Str[0]='\0';
for( int i=0; Host->h_addr_list[i]; i++ )
sprintf( Str+strlen(Str), "%u.%u.%u.%u ",
Host->h_addr_list[i][0]&0xFF, Host->h_addr_list[i][1]&0xFF,
Host->h_addr_list[i][2]&0xFF, Host->h_addr_list[i][3]&0xFF );
MessageBox( Str );

Hope that helps,
Joe

Thu, 11 Jan 2001 03:00:00 GMT