/*
 * IPAdapterAddressesWatcher.cpp 
 * Copyright (c) 2009 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED. 
 */


// SOL++2000
// 2008/07/21
//

#include <sol\WSAInitializer.h>

#include <sol\net\IPAdapterAddresses.h>
#include <sol\StringBufferT.h>
#include <sol/StringConverter.h>

//..\cc.bat IPAdapterAddressesWatcher.cpp

//#include <process.h>

// Thread procedure for this IP Address Watcher program

unsigned __stdcall watcherThread(void *);

/*
 * Simple application to see the effect of Windows NotifyAddrChange API. 
 * You can easily change this to Windows Application by defining WinMain 
 * instead of main.
 */

//int APIENTRY WinMain(HINSTANCE progIns, HINSTANCE prevIns, 
//           LPSTR cmdLine, int cmdShow)
int _tmain(int argc, TCHAR** argv)

{
    WSAInitializer initializer;

    try {
        DWORD threadId=0;
        HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, watcherThread, NULL, 0, (unsigned int*)&threadId);

         if (hThread) {
            WaitForSingleObject(hThread, INFINITE);
                CloseHandle(hThread);
            }

    } catch (int err) {
        printf("Exception: %d\n", err);
    } catch (...) {

    }
    return 0;

}

//
// Show current state of network interface with up IP addresses.
//
int showMessageBox(IPAdapterAddresses& address)
{
    StringBufferT<char> sbuffer;

    const char* state = "IPAdapterAddressesWatcher: Address changed";
    const char* confirm = "Do you continue to monitor the change of IP address?\r\n\r\n";
    sbuffer.append(confirm);
    address.listup();
    int count = 0;
    PIP_ADAPTER_ADDRESSES adapter= address.getAdaptersAddresses(count);
    for (PIP_ADAPTER_ADDRESSES adpt= adapter; adpt !=NULL; adpt= adpt->Next) {
                
        if(adpt->IfType == IF_TYPE_SOFTWARE_LOOPBACK ) {
                //printf("Ignore %d\n", n);
            continue;     // Ignore 
        }
        if (adpt->OperStatus == IfOperStatusUp) {
            StringConverter converter;    
            
            char* friendlyName = converter.toMultiByte(adpt->FriendlyName);
            sbuffer.append("Up:");
            sbuffer.append(friendlyName);
            sbuffer.append("\r\n");
            delete [] friendlyName;

        }
    }
    return MessageBoxA(NULL, (const char*)sbuffer, state, MB_ICONQUESTION|MB_YESNO);
}


//
// Thread procedure to get notification of IPAddress changes of NeworkInterface. 
//
unsigned __stdcall watcherThread(void *lpx)
{
    int rc = 0;

    //WSAInitializer initializer;

    IPAdapterAddresses address;
    address.listup();

    if (showMessageBox(address) == IDNO) {
        return rc;
    }

    while(true) {
        //printf("Waiting NotifyAddrChange.Blocked here\n");
        DWORD ret = NotifyAddrChange(NULL, NULL);
        
        if (ret == NO_ERROR) {
            
            address.listup();
            int c = address.getCount();

            printf("Detected IPAddress change...Count=%d\n", c);
                        
            if (c > 0) {
                if (showMessageBox(address) == IDNO) {
                    break;
                }
            }
        } else {
            printf("NotifyAddrChange:Error=%d\n", ret);
        }    
    }
    return rc;
}