How To Retrieve the IP Address of the Remote PPP Peer

MORE INFORMATION

Sample Code

   #include <windows.h>
   #include <winsock.h>

   #define MAXLEN   64

   BOOL GetIpAddress(char * hostname);

   int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                      LPTSTR lpCmdLine, int nCmdSHow)
   {
      WSADATA  wsadata;
      HOSTENT *lpHost=NULL;
      char    hostname[MAXLEN];
      WCHAR    msg[128];
      int      ret, addrlen;
      SOCKET    sock;
      struct   sockaddr_in   dest, retaddr;


      WSAStartup(0x0101, &wsadata);

      if ((ret = gethostname(hostname, MAXLEN)) != 0)
      {
         wsprintf(msg, L"Error calling gethostname: %d", ret);
         MessageBox(NULL, msg, NULL, MB_OK);
      }
      else
      {
         wsprintf(msg, L"Hostname is: %S", hostname);
         MessageBox(NULL, msg, L"Hostname", MB_OK);
      }

      // Print the local IP address.
      MessageBox(NULL, L"Local IP address is", L"Address", MB_OK);
      GetIpAddress (hostname);
      // Print the remote peer IP address.
      MessageBox(NULL, L"Remote IP address is", L"Address", MB_OK);
      GetIpAddress ("ppp_peer");

      WSACleanup();

      return 0;
   }



   BOOL GetIpAddress(char *hostname)
   {
      WCHAR    msg[128];
      HOSTENT *lpHost=NULL;
           struct sockaddr_in   dest;

      lpHost = gethostbyname(hostname);
      if (lpHost == NULL)
      {
         wsprintf(msg, L"gethostbyname failed: %d", WSAGetLastError());
         MessageBox(NULL, msg, NULL, MB_OK);
      }
      else
      {
         for(int i=0; lpHost->h_addr_list[i] != NULL ;i++)
         {
            memcpy(&(dest.sin_addr), lpHost->h_addr_list[i],
                   lpHost->h_length);
            wsprintf(msg, L"IP address is: '%S'",
                     inet_ntoa(dest.sin_addr));
            MessageBox(NULL, msg, L"IP Address", MB_OK);
         }

      }
      return 0;
   }