Question

I would like to send an email from an application that contains the current ip address of the machine.

I have the email code in place and it works. I just need to add the ipaddress to the body of the email (ie I am not doing anything programmatically with the IP address).

I was hoping there was a really simple way like running ipconfig via the system command and grabbing the resultant text.

I would rather not have to open a socket.

Thanks,

Answer 1

This code will loop all adapters and check for the first which is up.

#include <afxtempl.h>
#include <afxsock.h>
#include <iphlpapi.h>

u_long GetFirstIpAddressUp(SOCKET s)
{
#define MAX_ADAPTERS    30
#pragma comment(lib, "Iphlpapi.lib")
    IP_ADAPTER_ADDRESSES AdapterAddresses[MAX_ADAPTERS];           
    PIP_ADAPTER_ADDRESSES pAdapterAddresses = AdapterAddresses;                                              
    DWORD dwBufLen = sizeof(AdapterAddresses);
    if (GetAdaptersAddresses(AF_INET, 0, NULL, AdapterAddresses,&dwBufLen) == ERROR_SUCCESS)
    {
        do {
            if ((pAdapterAddresses->OperStatus == IfOperStatusUp))
            {
                sockaddr_in* pAdr = (sockaddr_in*)pAdapterAddresses->FirstUnicastAddress->Address.lpSockaddr;
                return pAdr->sin_addr.S_un.S_addr;
            }
        pAdapterAddresses = pAdapterAddresses->Next;
        } while(pAdapterAddresses);
    }
    return INADDR_ANY;  // No adapters are up
}