Hello all!
Sometimes is useful to know the IP address of the machine we are working on,
for example when we connect a SMTP server and do the EHLO <domain> command.
I have written a short C++ program that first prints the host name and the
host IP address, then if arguments from command line are passed prints
the IP address of each domain name.
/* IPadress.cpp
Author: HIToC
*/
#include <iostream.h>
#include <unistd.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <string>
#include <stdio.h>
int main(int argc, char* argv[])
{
hostent *hh;
string IP, my_name;
char* host_name = new char[64];
gethostname(host_name, 64);
my_name = host_name;
cout <<"Host name:\t\t" <<my_name <<'\n';
hh = gethostbyname(host_name);
IP = inet_ntoa(*((struct in_addr *)hh->h_addr));
cout <<"My IP address:\t\t" <<IP <<"\n\n";
for(int i = 1; i<argc; i++) {
hh = gethostbyname(argv[i]);
if(hh == NULL) {
cerr <<"Error with \"" <<argv[i] <<"\" !\n";
continue;
}
IP = inet_ntoa(*((struct in_addr *)hh->h_addr));
cout <<"IP address of " <<argv[i] <<" :\t" <<IP <<'\n';
}
return 0;
}
If called without any parameter, the output is always:
Host name: linux
My IP address: 127.0.0.2
If like argument I pass localhost, thw output is:
Host name: linux
My IP address: 127.0.0.2
IP address of localhost: 127.0.0.1
My intent is to know my real IP address!
Can anybody help me?
Thaks for any suggestion.
--
With regards,
HIToC
[EMAIL PROTECTED]
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