使用Win32 Network API根据计算机名称获取本地计算机的IP地址

Question

I was looking up http://www.codeproject.com/KB/cs/network.aspx (How to get the IP address of a machine) and it mentions that "In the Win32 API this could be accomplished using the NetWork API."

I wish to use this API using C++ in order to find the IP address of a machine. I have the local computer's name on the network. I've tried looking it up on MSDN but only found the "Network Management" API and it doesn't appear to have the functions I need. I'm assuming I could use Win Socks to figure this out but it seems like a large amount of work for something which should be simple.

Any help appreciated.

EDIT: Should mention that I am talking about the local IP address, not external.

Answer 1

you can use the gethostbyname function

check this sample

#include <netdb.h>
#include <arpa/inet.h>
#include <iostream>

int main()
{
  const char* const host = "thecomputername" ;
  const hostent* host_info = 0 ;
  host_info = gethostbyname(host) ;

  if(host_info)
  {
    std::cout << "host: " << host_info->h_name << '\n' ;

    for( int i=0 ; host_info->h_addr_list[i] ; ++i )
    {
      const in_addr* address = (in_addr*)host_info->h_addr_list[i] ;
      std::cout << " address: " << inet_ntoa( *address ) << '\n' ;
    }
  }
  else herror( "error" ) ;
}

Answer 2

You can do this locally using GetAdapterAddresses in the IP Helper API .

The GetAdaptersAddresses function retrieves the addresses associated with the adapters on the local computer.