text: /*
   * libjingle
   * Copyright 2004--2005, Google Inc.
   *
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions are met:
   *
   *  1. Redistributions of source code must retain the above copyright notice, 
   *     this list of conditions and the following disclaimer.
   *  2. Redistributions in binary form must reproduce the above copyright notice,
   *     this list of conditions and the following disclaimer in the documentation
   *     and/or other materials provided with the distribution.
   *  3. The name of the author may not be used to endorse or promote products 
   *     derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
   * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <comdef.h>
  #include "netfw.h"
  #include "winfirewall.h"
  
  #define RELEASE(lpUnk) do \
  	{ if ((lpUnk) != NULL) { (lpUnk)->Release(); (lpUnk) = NULL; } } while (0)
  
  namespace talk_base {
  
  //////////////////////////////////////////////////////////////////////
  // WinFirewall
  //////////////////////////////////////////////////////////////////////
  
  WinFirewall::WinFirewall() : mgr_(NULL), policy_(NULL), profile_(NULL) {
  }
  
  WinFirewall::~WinFirewall() {
    Shutdown();
  }
  
  bool
  WinFirewall::Initialize() {
    if (mgr_)
      return true;
  
    HRESULT hr = CoCreateInstance(__uuidof(NetFwMgr),
                                  0, CLSCTX_INPROC_SERVER,
                                  __uuidof(INetFwMgr),
                                  reinterpret_cast<void **>(&mgr_));
    if (SUCCEEDED(hr) && (mgr_ != NULL))
      hr = mgr_->get_LocalPolicy(&policy_);
    if (SUCCEEDED(hr) && (policy_ != NULL))
      hr = policy_->get_CurrentProfile(&profile_);
    return SUCCEEDED(hr) && (profile_ != NULL);
  }
  
  void
  WinFirewall::Shutdown() {
    RELEASE(profile_);
    RELEASE(policy_);
    RELEASE(mgr_);
  }
  
  bool
  WinFirewall::Enabled() {
    if (!profile_)
      return false;
  
    VARIANT_BOOL fwEnabled = VARIANT_FALSE;
    profile_->get_FirewallEnabled(&fwEnabled);
    return (fwEnabled != VARIANT_FALSE);
  }
  
  bool
  WinFirewall::Authorized(const char * filename, bool * known) {
    if (known) {
      *known = false;
    }
  
    if (!profile_)
      return false;
  
    VARIANT_BOOL fwEnabled = VARIANT_FALSE;
    _bstr_t bfilename = filename;
  
    INetFwAuthorizedApplications * apps = NULL;
    HRESULT hr = profile_->get_AuthorizedApplications(&apps);
    if (SUCCEEDED(hr) && (apps != NULL)) {
      INetFwAuthorizedApplication * app = NULL;
      hr = apps->Item(bfilename, &app);
      if (SUCCEEDED(hr) && (app != NULL)) {
        hr = app->get_Enabled(&fwEnabled);
        app->Release();
        if (known) {
          *known = true;
        }
      } else if (hr != HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND)) {
        // Unexpected error
      }
      apps->Release();
    }
  
    return (fwEnabled != VARIANT_FALSE);
  }
  
  bool
  WinFirewall::AddApplication(const char * filename, const char * friendly_name,
                              bool authorized) {
    INetFwAuthorizedApplications * apps = NULL;
    HRESULT hr = profile_->get_AuthorizedApplications(&apps);
    if (SUCCEEDED(hr) && (apps != NULL)) {
      INetFwAuthorizedApplication * app = NULL;
      hr = CoCreateInstance(__uuidof(NetFwAuthorizedApplication),
                            0, CLSCTX_INPROC_SERVER,
                            __uuidof(INetFwAuthorizedApplication),
                            reinterpret_cast<void **>(&app));
      if (SUCCEEDED(hr) && (app != NULL)) {
        _bstr_t bstr = filename;
        hr = app->put_ProcessImageFileName(bstr);
        bstr = friendly_name;
        if (SUCCEEDED(hr))
          hr = app->put_Name(bstr);
        if (SUCCEEDED(hr))
          hr = app->put_Enabled(authorized ? VARIANT_TRUE : VARIANT_FALSE);
        if (SUCCEEDED(hr))
          hr = apps->Add(app);
        app->Release();
      }
      apps->Release();
    }
    return SUCCEEDED(hr);
  }
  
  } // namespace talk_base
  