preserve type when loaded image is rescaled, #11543

[wxWidgets.git] / src / unix / dialup.cpp

diff --git a/src/unix/dialup.cpp b/src/unix/dialup.cpp
index f6023963be7873d34b553751ec22d28f9ecc1865..e5246b15ee17ee75861c4bbeb085b66647f417b4 100644 (file)
--- a/src/unix/dialup.cpp
+++ b/src/unix/dialup.cpp
@@ -1,38 +1,35 @@
-// -*- c++ -*- ///////////////////////////////////////////////////////////////
-// Name:        unix/dialup.cpp
-// Purpose:     Network related wxWindows classes and functions
-// Author:      Karsten Ballüder
+// -*- c++ -*- ////////////////////////////////////////////////////////////////
+// Name:        src/unix/dialup.cpp
+// Purpose:     Network related wxWidgets classes and functions
+// Author:      Karsten Ballüder

 // Modified by:
 // Created:     03.10.99
 // RCS-ID:      $Id$
 // Modified by:
 // Created:     03.10.99
 // RCS-ID:      $Id$

-// Copyright:   (c) Karsten Ballüder
+// Copyright:   (c) Karsten Ballüder

 // Licence:     wxWindows licence
 // Licence:     wxWindows licence

-/////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////

 
 

-#include "wx/setup.h"
-
-#ifdef __GNUG__
-#   pragma implementation "dialup.h"
-#endif
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"

 
 #if wxUSE_DIALUP_MANAGER
 
 
 #if wxUSE_DIALUP_MANAGER
 

+#include "wx/dialup.h"
+

 #ifndef  WX_PRECOMP
 #ifndef  WX_PRECOMP

-#   include "wx/defs.h"
+    #include "wx/string.h"
+    #include "wx/intl.h"
+    #include "wx/log.h"
+    #include "wx/event.h"
+    #include "wx/app.h"
+    #include "wx/utils.h"
+    #include "wx/timer.h"

 #endif // !PCH
 
 #endif // !PCH
 

-#include "wx/string.h"
-#include "wx/event.h"
-#include "wx/dialup.h"
-#include "wx/timer.h"
-#include "wx/filefn.h"
-#include "wx/utils.h"
-#include "wx/log.h"
-#include "wx/file.h"
+#include "wx/filename.h"
+#include "wx/ffile.h"

 #include "wx/process.h"
 #include "wx/process.h"

-#include "wx/intl.h"
-#include "wx/app.h"
-#include "wx/wxchar.h"
+#include "wx/crt.h"

 
 #include <stdlib.h>
 
 
 #include <stdlib.h>
 


@@ -46,6 +43,9 @@
 #include <arpa/inet.h>
 #include <errno.h>
 
 #include <arpa/inet.h>
 #include <errno.h>
 

+wxDEFINE_EVENT( wxEVT_DIALUP_CONNECTED, wxDialUpEvent );
+wxDEFINE_EVENT( wxEVT_DIALUP_DISCONNECTED, wxDialUpEvent );
+

 // ----------------------------------------------------------------------------
 // A class which groups functions dealing with connecting to the network from a
 // workstation using dial-up access to the net. There is at most one instance
 // ----------------------------------------------------------------------------
 // A class which groups functions dealing with connecting to the network from a
 // workstation using dial-up access to the net. There is at most one instance


@@ -73,19 +73,19 @@ class WXDLLEXPORT wxDialUpManagerImpl : public wxDialUpManager
 {
 public:
    wxDialUpManagerImpl();
 {
 public:
    wxDialUpManagerImpl();

-   ~wxDialUpManagerImpl();
+   virtual ~wxDialUpManagerImpl();

 
    /** Could the dialup manager be initialized correctly? If this function
 
    /** Could the dialup manager be initialized correctly? If this function

-       returns FALSE, no other functions will work neither, so it's a good idea
+       returns false, no other functions will work neither, so it's a good idea

        to call this function and check its result before calling any other
        wxDialUpManager methods.
    */
    virtual bool IsOk() const
        to call this function and check its result before calling any other
        wxDialUpManager methods.
    */
    virtual bool IsOk() const

-      { return TRUE; }
+      { return true; }

 
    /** The simplest way to initiate a dial up: this function dials the given
        ISP (exact meaning of the parameter depends on the platform), returns
 
    /** The simplest way to initiate a dial up: this function dials the given
        ISP (exact meaning of the parameter depends on the platform), returns

-       TRUE on success or FALSE on failure and logs the appropriate error
+       true on success or false on failure and logs the appropriate error

        message in the latter case.
        @param nameOfISP optional paramater for dial program
        @param username unused
        message in the latter case.
        @param nameOfISP optional paramater for dial program
        @param username unused


@@ -96,32 +96,26 @@ public:
                      const wxString& WXUNUSED(password),
                      bool async);
 
                      const wxString& WXUNUSED(password),
                      bool async);
 

-   /// Hang up the currently active dial up connection.
+   // Hang up the currently active dial up connection.

    virtual bool HangUp();
 
    virtual bool HangUp();
 

-   // returns TRUE if the computer is connected to the network: under Windows,
+   // returns true if the computer is connected to the network: under Windows,

    // this just means that a RAS connection exists, under Unix we check that
    // the "well-known host" (as specified by SetWellKnownHost) is reachable
    virtual bool IsOnline() const
       {
    // this just means that a RAS connection exists, under Unix we check that
    // the "well-known host" (as specified by SetWellKnownHost) is reachable
    virtual bool IsOnline() const
       {

-         if( (! m_timer) // we are not polling, so test now:
-             || m_IsOnline < 0
-            )
-            CheckStatus();
-         return m_IsOnline != 0;
+         CheckStatus();
+         return m_IsOnline == Net_Connected;

       }
 
       }
 

-   /// do we have a constant net connection? -- GUESS!
-   bool IsAlwaysOnline() const
-      {
-         ((wxDialUpManagerImpl *) this)->HangUp(); // brutal but necessary
-         return IsOnline();
-      }
-   /// returns TRUE if (async) dialing is in progress
-   inline virtual bool IsDialing() const
+   // do we have a constant net connection?
+   virtual bool IsAlwaysOnline() const;
+
+   // returns true if (async) dialing is in progress
+   virtual bool IsDialing() const

       { return m_DialProcess != NULL; }
 
       { return m_DialProcess != NULL; }
 

-   // cancel dialing the number initiated with Dial(async = TRUE)
+   // cancel dialing the number initiated with Dial(async = true)

    // NB: this won't result in DISCONNECTED event being sent
    virtual bool CancelDialing();
 
    // NB: this won't result in DISCONNECTED event being sent
    virtual bool CancelDialing();
 


@@ -132,8 +126,8 @@ public:
    // so, in general, the user should be allowed to override it. This function
    // allows to forcefully set the online status - whatever our internal
    // algorithm may think about it.
    // so, in general, the user should be allowed to override it. This function
    // allows to forcefully set the online status - whatever our internal
    // algorithm may think about it.

-   virtual void SetOnlineStatus(bool isOnline = TRUE)
-      { m_IsOnline = isOnline; }
+   virtual void SetOnlineStatus(bool isOnline = true)
+      { m_IsOnline = isOnline ? Net_Connected : Net_No; }

 
    // set misc wxDialUpManager options
    // --------------------------------
 
    // set misc wxDialUpManager options
    // --------------------------------


@@ -144,7 +138,7 @@ public:
    // Windows, the notification about the change of connection status is
    // instantenous.
    //
    // Windows, the notification about the change of connection status is
    // instantenous.
    //

-   // Returns FALSE if couldn't set up automatic check for online status.
+   // Returns false if couldn't set up automatic check for online status.

    virtual bool EnableAutoCheckOnlineStatus(size_t nSeconds);
 
    // disable automatic check for connection status change - notice that the
    virtual bool EnableAutoCheckOnlineStatus(size_t nSeconds);
 
    // disable automatic check for connection status change - notice that the


@@ -162,54 +156,87 @@ public:
    virtual void SetConnectCommand(const wxString &command, const wxString &hupcmd)
       { m_ConnectCommand = command; m_HangUpCommand = hupcmd; }
 
    virtual void SetConnectCommand(const wxString &command, const wxString &hupcmd)
       { m_ConnectCommand = command; m_HangUpCommand = hupcmd; }
 

+//private: -- Sun CC 4.2 objects to using NetConnection enum as the return
+//            type if it is declared private
+
+   // the possible results of testing for Online() status
+   enum NetConnection
+   {
+       Net_Unknown = -1,    // we couldn't learn anything
+       Net_No,              // no network connection [currently]
+       Net_Connected        // currently connected
+   };
+
+   // the possible net connection types
+   enum NetDeviceType
+   {
+       NetDevice_None    = 0x0000,  // no network devices (authoritative)
+       NetDevice_Unknown = 0x0001,  // test doesn't work on this OS
+       NetDevice_Modem   = 0x0002,  // we have a modem
+       NetDevice_LAN     = 0x0004   //         a network card
+   };
+

 private:
 private:

-   /// -1: don´t know, 0 = no, 1 = yes
-   int m_IsOnline;
+   // the current status
+   NetConnection m_IsOnline;
+
+   // the connection we have with the network card
+   NetConnection m_connCard;

 
 

-   ///  Can we use ifconfig to list active devices?
+   // Can we use ifconfig to list active devices?

    int m_CanUseIfconfig;
    int m_CanUseIfconfig;

-   /// The path to ifconfig
+
+   // The path to ifconfig

    wxString m_IfconfigPath;
 
    wxString m_IfconfigPath;
 

-   ///  Can we use ping to find hosts?
+   //  Can we use ping to find hosts?

    int m_CanUsePing;
    int m_CanUsePing;

-   /// The path to ping program
+   // The path to ping program

    wxString m_PingPath;
 
    wxString m_PingPath;
 

-   /// beacon host:
+   // beacon host:

    wxString m_BeaconHost;
    wxString m_BeaconHost;

-   /// beacon host portnumber for connect:
+   // beacon host portnumber for connect:

    int m_BeaconPort;
 
    int m_BeaconPort;
 

-   /// command to connect to network
+   // command to connect to network

    wxString m_ConnectCommand;
    wxString m_ConnectCommand;

-   /// command to hang up
+   // command to hang up

    wxString m_HangUpCommand;
    wxString m_HangUpCommand;

-   /// name of ISP
+   // name of ISP

    wxString m_ISPname;
    wxString m_ISPname;

-   /// a timer for regular testing
+   // a timer for regular testing

    class AutoCheckTimer *m_timer;
    friend class AutoCheckTimer;
 
    class AutoCheckTimer *m_timer;
    friend class AutoCheckTimer;
 

-   /// a wxProcess for dialling in background
+   // a wxProcess for dialling in background

    class wxDialProcess *m_DialProcess;
    class wxDialProcess *m_DialProcess;

-   /// pid of dial process
+   // pid of dial process

    int m_DialPId;
    friend class wxDialProcess;
 
    int m_DialPId;
    friend class wxDialProcess;
 

-   /// determine status
-   void CheckStatus(bool fromAsync = FALSE) const;
+   // determine status
+   void CheckStatus(bool fromAsync = false) const;
+
+   // real status check
+   void CheckStatusInternal();
+
+   // check /proc/net (Linux only) for ppp/eth interfaces, returns the bit
+   // mask of NetDeviceType constants
+   int CheckProcNet();

 
 

-   /// real status check
-   void CheckStatusInternal(void);
+   // check output of ifconfig command for PPP/SLIP/PLIP devices, returns the
+   // bit mask of NetDeviceType constants
+   int CheckIfconfig();

 
 

-   /// Check output of ifconfig command for PPP/SLIP/PLIP devices
-   int CheckIfconfig(void);
-   /// Ping a host: 1 on success, -1 if it cannot be used, 0 if unreachable
-   int CheckPing(void);
-   /// Check by connecting to host on given port.
-   int CheckConnect(void);
+   // combines the 2 possible checks for determining the connection status
+   NetConnection CheckConnectAndPing();

 
 

+   // pings a host
+   NetConnection CheckPing();
+
+   // check by connecting to host on given port.
+   NetConnection CheckConnect();

 };
 
 
 };
 
 


@@ -217,21 +244,18 @@ class AutoCheckTimer : public wxTimer
 {
 public:
    AutoCheckTimer(wxDialUpManagerImpl *dupman)
 {
 public:
    AutoCheckTimer(wxDialUpManagerImpl *dupman)

-      {
-         m_dupman = dupman;
-         m_started = FALSE;
-      }
-
-   virtual bool Start( int millisecs = -1, bool WXUNUSED(one_shot) = FALSE )
-      { m_started = TRUE; return wxTimer::Start(millisecs, FALSE); }
+   {
+       m_dupman = dupman;
+   }

 
    virtual void Notify()
 
    virtual void Notify()

-      { wxLogTrace(wxT("Checking dial up network status.")); m_dupman->CheckStatus(); }
+   {
+       wxLogTrace(wxT("dialup"), wxT("Checking dial up network status."));
+
+       m_dupman->CheckStatus();
+   }

 
 

-   virtual void Stop()
-      { if ( m_started ) wxTimer::Stop(); }

 public:
 public:

-   bool m_started;

    wxDialUpManagerImpl *m_dupman;
 };
 
    wxDialUpManagerImpl *m_dupman;
 };
 


@@ -242,13 +266,13 @@ public:
       {
          m_DupMan = dupman;
       }
       {
          m_DupMan = dupman;
       }

-   void Disconnect(void) { m_DupMan = NULL; }
+   void Disconnect() { m_DupMan = NULL; }

    virtual void OnTerminate(int WXUNUSED(pid), int WXUNUSED(status))
       {
          if(m_DupMan)
          {
             m_DupMan->m_DialProcess = NULL;
    virtual void OnTerminate(int WXUNUSED(pid), int WXUNUSED(status))
       {
          if(m_DupMan)
          {
             m_DupMan->m_DialProcess = NULL;

-            m_DupMan->CheckStatus(TRUE);
+            m_DupMan->CheckStatus(true);

          }
       }
 private:
          }
       }
 private:


@@ -258,12 +282,8 @@ private:
 
 wxDialUpManagerImpl::wxDialUpManagerImpl()
 {
 
 wxDialUpManagerImpl::wxDialUpManagerImpl()
 {

-   /* The isOnline flag can have the following values internally:
-      0  : not connected
-      1  : connected
-      -1 : unknown/undefined status
-   */
-   m_IsOnline = -1; 
+   m_IsOnline =
+   m_connCard = Net_Unknown;

    m_DialProcess = NULL;
    m_timer = NULL;
    m_CanUseIfconfig = -1; // unknown
    m_DialProcess = NULL;
    m_timer = NULL;
    m_CanUseIfconfig = -1; // unknown


@@ -272,15 +292,15 @@ wxDialUpManagerImpl::wxDialUpManagerImpl()
    m_BeaconPort = 80;
 
 #ifdef __SGI__
    m_BeaconPort = 80;
 
 #ifdef __SGI__

-   m_ConnectCommand = _T("/usr/etc/ppp");
+   m_ConnectCommand = wxT("/usr/etc/ppp");

 #elif defined(__LINUX__)
    // default values for Debian/GNU linux
 #elif defined(__LINUX__)
    // default values for Debian/GNU linux

-   m_ConnectCommand = _T("pon");
-   m_HangUpCommand = _T("poff");
+   m_ConnectCommand = wxT("pon");
+   m_HangUpCommand = wxT("poff");

 #endif
 
 #endif
 

-   wxChar * dial = wxGetenv(_T("WXDIALUP_DIALCMD"));
-   wxChar * hup = wxGetenv(_T("WXDIALUP_HUPCMD"));
+   wxChar * dial = wxGetenv(wxT("WXDIALUP_DIALCMD"));
+   wxChar * hup = wxGetenv(wxT("WXDIALUP_HUPCMD"));

    SetConnectCommand(dial ? wxString(dial) : m_ConnectCommand,
                      hup ? wxString(hup) : m_HangUpCommand);
 }
    SetConnectCommand(dial ? wxString(dial) : m_ConnectCommand,
                      hup ? wxString(hup) : m_HangUpCommand);
 }


@@ -301,61 +321,58 @@ wxDialUpManagerImpl::Dial(const wxString &isp,
                           const wxString & WXUNUSED(password),
                           bool async)
 {
                           const wxString & WXUNUSED(password),
                           bool async)
 {

-   if(m_IsOnline == 1)
-      return FALSE;
-   m_ISPname = isp;
-   wxString cmd;
-   if(m_ConnectCommand.Find(wxT("%s")))
-      cmd.Printf(m_ConnectCommand,m_ISPname.c_str());
-   else
-      cmd = m_ConnectCommand;
-
-   if ( async )
-   {
-      m_DialProcess = new wxDialProcess(this);
-      m_DialPId = wxExecute(cmd, FALSE, m_DialProcess);
-      if(m_DialPId == 0)
-      {
-         delete m_DialProcess;
-         m_DialProcess = NULL;
-         return FALSE;
-      }
-      else
-         return TRUE;
-   }
-   else
-       return wxExecute(cmd, /* sync */ TRUE) == 0;
+    if(m_IsOnline == Net_Connected)
+        return false;
+    m_ISPname = isp;
+    wxString cmd;
+    if(m_ConnectCommand.Find(wxT("%s")))
+        cmd.Printf(m_ConnectCommand,m_ISPname.c_str());
+    else
+        cmd = m_ConnectCommand;
+
+    if ( async )
+    {
+        m_DialProcess = new wxDialProcess(this);
+        m_DialPId = (int)wxExecute(cmd, false, m_DialProcess);
+        if(m_DialPId == 0)
+        {
+            delete m_DialProcess;
+            m_DialProcess = NULL;
+            return false;
+        }
+        else
+            return true;
+    }
+    else
+        return wxExecute(cmd, /* sync */ true) == 0;

 }
 
 }
 

-bool
-wxDialUpManagerImpl::HangUp(void)
+bool wxDialUpManagerImpl::HangUp()

 {
 {

-   if(m_IsOnline == 0)
-      return FALSE;
-   if(IsDialing())
-   {
-      wxLogError(_("Already dialling ISP."));
-      return FALSE;
-   }
-   wxString cmd;
-   if(m_HangUpCommand.Find(wxT("%s")))
-      cmd.Printf(m_HangUpCommand,m_ISPname.c_str(), m_DialProcess);
-   else
-      cmd = m_HangUpCommand;
-   return wxExecute(cmd, /* sync */ TRUE) == 0;
+    if(m_IsOnline == Net_No)
+        return false;
+    if(IsDialing())
+    {
+        wxLogError(_("Already dialling ISP."));
+        return false;
+    }
+    wxString cmd;
+    if(m_HangUpCommand.Find(wxT("%s")))
+        cmd.Printf(m_HangUpCommand,m_ISPname.c_str(), m_DialProcess);
+    else
+        cmd = m_HangUpCommand;
+    return wxExecute(cmd, /* sync */ true) == 0;

 }
 
 
 }
 
 

-bool
-wxDialUpManagerImpl::CancelDialing()
+bool wxDialUpManagerImpl::CancelDialing()

 {
    if(! IsDialing())
 {
    if(! IsDialing())

-      return FALSE;
+      return false;

    return kill(m_DialPId, SIGTERM) > 0;
 }
 
    return kill(m_DialPId, SIGTERM) > 0;
 }
 

-bool
-wxDialUpManagerImpl::EnableAutoCheckOnlineStatus(size_t nSeconds)
+bool wxDialUpManagerImpl::EnableAutoCheckOnlineStatus(size_t nSeconds)

 {
    DisableAutoCheckOnlineStatus();
    m_timer = new AutoCheckTimer(this);
 {
    DisableAutoCheckOnlineStatus();
    m_timer = new AutoCheckTimer(this);


@@ -368,8 +385,7 @@ wxDialUpManagerImpl::EnableAutoCheckOnlineStatus(size_t nSeconds)
    return rc;
 }
 
    return rc;
 }
 

-void
-wxDialUpManagerImpl::DisableAutoCheckOnlineStatus()
+void wxDialUpManagerImpl::DisableAutoCheckOnlineStatus()

 {
    if(m_timer != NULL)
    {
 {
    if(m_timer != NULL)
    {


@@ -380,19 +396,18 @@ wxDialUpManagerImpl::DisableAutoCheckOnlineStatus()
 }
 
 
 }
 
 

-void
-wxDialUpManagerImpl::SetWellKnownHost(const wxString& hostname, int portno)
+void wxDialUpManagerImpl::SetWellKnownHost(const wxString& hostname, int portno)

 {
 {

-   if(hostname.Length() == 0)
+   if(hostname.length() == 0)

    {
       m_BeaconHost = WXDIALUP_MANAGER_DEFAULT_BEACONHOST;
       m_BeaconPort = 80;
       return;
    }
    {
       m_BeaconHost = WXDIALUP_MANAGER_DEFAULT_BEACONHOST;
       m_BeaconPort = 80;
       return;
    }

-         
-   /// does hostname contain a port number?
+
+   // does hostname contain a port number?

    wxString port = hostname.After(wxT(':'));
    wxString port = hostname.After(wxT(':'));

-   if(port.Length())
+   if(port.length())

    {
       m_BeaconHost = hostname.Before(wxT(':'));
       m_BeaconPort = wxAtoi(port);
    {
       m_BeaconHost = hostname.Before(wxT(':'));
       m_BeaconPort = wxAtoi(port);


@@ -405,58 +420,139 @@ wxDialUpManagerImpl::SetWellKnownHost(const wxString& hostname, int portno)
 }
 
 
 }
 
 

-void
-wxDialUpManagerImpl::CheckStatus(bool fromAsync) const
+void wxDialUpManagerImpl::CheckStatus(bool fromAsync) const

 {
 {

-   // This function calls the CheckStatusInternal() helper function
-   // which is OS - specific and then sends the events.
-
-   int oldIsOnline = m_IsOnline;
-   ( /* non-const */ (wxDialUpManagerImpl *)this)->CheckStatusInternal();
-
-   // now send the events as appropriate:
-   if(m_IsOnline != oldIsOnline // it changed
-      && ( m_IsOnline == 1      // and it is a defined status
-           || m_IsOnline == 0)
-      // only send events for well defined transitions
-      && ( oldIsOnline == 1 || oldIsOnline == 0) 
-      )
-   {
-      wxDialUpEvent event(m_IsOnline, ! fromAsync);
-      (void)wxTheApp->ProcessEvent(event);
-   }
+    // This function calls the CheckStatusInternal() helper function
+    // which is OS - specific and then sends the events.
+
+    NetConnection oldIsOnline = m_IsOnline;
+    ( /* non-const */ (wxDialUpManagerImpl *)this)->CheckStatusInternal();
+
+    // now send the events as appropriate: i.e. if the status changed and
+    // if we're in defined state
+    if(m_IsOnline != oldIsOnline
+            && m_IsOnline != Net_Unknown
+            && oldIsOnline != Net_Unknown )
+    {
+        wxDialUpEvent event(m_IsOnline == Net_Connected, ! fromAsync);
+        (void)wxTheApp->ProcessEvent(event);
+    }

 }
 
 /*
 }
 
 /*

-  We have three methods that we can use:
+   We first try to find out if ppp interface is active. If it is, we assume
+   that we're online but don't have a permanent connection (this is false if a
+   networked machine uses modem to connect to somewhere else, but we can't do
+   anything in this case anyhow).
+
+   If no ppp interface is detected, we check for eth interface. If it is
+   found, we check that we can, indeed, connect to an Internet host. The logic
+   here is that connection check should be fast enough in this case and we
+   don't want to give false positives in a (common) case of a machine on a LAN
+   which is not connected to the outside.
+
+   If we didn't find either ppp or eth interfaces, we stop here and decide
+   that we're connected. However, if couldn't check for this, we try to ping a
+   remote host just in case.
+
+   NB1: Checking for the interface presence can be done in 2 ways
+        a) reading /proc/net/dev under Linux
+        b) spawning ifconfig under any OS

 
 

-  1. test via /sbin/ifconfig and grep for "sl", "ppp", "pl"
-     --> should be fast enough for regular polling
-  2. test if we can reach the well known beacon host
-     --> too slow for polling
-  3. check /proc/net/dev on linux??
-     This method should be preferred, if possible. Need to do more
-     testing.
+        The first method is faster but only works under Linux.

 
 

+   NB2: pinging, actually, means that we first try to connect "manually" to
+        a port on remove machine and if it fails, we run ping.

 */
 
 */
 

-void
-wxDialUpManagerImpl::CheckStatusInternal(void)
+void wxDialUpManagerImpl::CheckStatusInternal()

 {
 {

-   m_IsOnline = -1;
+    m_IsOnline = Net_Unknown;
+
+    // first do quick checks to determine what kind of network devices do we
+    // have
+    int netDeviceType = CheckProcNet();
+    if ( netDeviceType == NetDevice_Unknown )
+    {
+        // nothing found, try ifconfig too
+        netDeviceType = CheckIfconfig();
+    }
+
+    switch ( netDeviceType )
+    {
+        case NetDevice_None:
+            // no network devices, no connection
+            m_IsOnline = Net_No;
+            break;
+
+        case NetDevice_LAN:
+            // we still do ping to confirm that we're connected but we only do
+            // it once and hope that the purpose of the network card (i.e.
+            // whether it used for connecting to the Internet or just to a
+            // LAN) won't change during the program lifetime
+            if ( m_connCard == Net_Unknown )
+            {
+                m_connCard = CheckConnectAndPing();
+            }
+            m_IsOnline = m_connCard;
+            break;
+
+        case NetDevice_Unknown:
+            // try to ping just in case
+            m_IsOnline = CheckConnectAndPing();
+            break;
+
+        case NetDevice_LAN + NetDevice_Modem:
+        case NetDevice_Modem:
+            // assume we're connected
+            m_IsOnline = Net_Connected;
+            break;
+
+        default:
+            wxFAIL_MSG(wxT("Unexpected netDeviceType"));
+    }
+}
+
+bool wxDialUpManagerImpl::IsAlwaysOnline() const
+{
+    wxDialUpManagerImpl *self = wxConstCast(this, wxDialUpManagerImpl);
+
+    int netDeviceType = self->CheckProcNet();
+    if ( netDeviceType == NetDevice_Unknown )
+    {
+        // nothing found, try ifconfig too
+        netDeviceType = self->CheckIfconfig();
+    }
+
+    if ( netDeviceType == NetDevice_Unknown )
+    {
+        // this is the only thing we can do unfortunately...
+        self->HangUp();
+        return IsOnline();
+    }
+    else
+    {
+        // we are only permanently online if we have a network card
+        return (netDeviceType & NetDevice_LAN) != 0;
+    }
+}

 
 

-   int testResult;
+wxDialUpManagerImpl::NetConnection wxDialUpManagerImpl::CheckConnectAndPing()
+{
+    NetConnection conn;
+
+    // first try connecting - faster
+    conn = CheckConnect();
+    if ( conn == Net_Unknown )
+    {
+        // try pinging too
+        conn = CheckPing();
+    }

 
 

-   testResult = CheckConnect();
-   if(testResult == -1)
-      testResult = CheckIfconfig();
-   if(testResult == -1)
-      testResult = CheckPing();
-      m_IsOnline = testResult;
+    return conn;

 }
 
 }
 

-int
-wxDialUpManagerImpl::CheckConnect(void)
+wxDialUpManagerImpl::NetConnection wxDialUpManagerImpl::CheckConnect()

 {
    // second method: try to connect to a well known host:
    // This can be used under Win 9x, too!
 {
    // second method: try to connect to a well known host:
    // This can be used under Win 9x, too!


@@ -464,7 +560,7 @@ wxDialUpManagerImpl::CheckConnect(void)
    struct sockaddr_in  serv_addr;
 
    if((hp = gethostbyname(m_BeaconHost.mb_str())) == NULL)
    struct sockaddr_in  serv_addr;
 
    if((hp = gethostbyname(m_BeaconHost.mb_str())) == NULL)

-      return 0; // no DNS no net
+      return Net_No; // no DNS no net

 
    serv_addr.sin_family = hp->h_addrtype;
    memcpy(&serv_addr.sin_addr,hp->h_addr, hp->h_length);
 
    serv_addr.sin_family = hp->h_addrtype;
    memcpy(&serv_addr.sin_addr,hp->h_addr, hp->h_length);


@@ -473,155 +569,259 @@ wxDialUpManagerImpl::CheckConnect(void)
    int sockfd;
    if( ( sockfd = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0)
    {
    int sockfd;
    if( ( sockfd = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0)
    {

-      return -1;  // no info
+      return Net_Unknown;  // no info

    }
 
    if( connect(sockfd, (struct sockaddr *) &serv_addr,
                sizeof(serv_addr)) >= 0)
    {
       close(sockfd);
    }
 
    if( connect(sockfd, (struct sockaddr *) &serv_addr,
                sizeof(serv_addr)) >= 0)
    {
       close(sockfd);

-      return 1; // we cant connect, so we have a network!
+      return Net_Connected; // we can connect, so we have a network!
+   }
+   else // failed to connect
+   {
+#ifdef ENETUNREACH
+       if(errno == ENETUNREACH)
+          return Net_No; // network is unreachable
+       else
+#endif
+          return Net_Unknown; // connect failed, but don't know why

    }
    }

-   //connected!
-   close(sockfd);
-   if(errno == ENETUNREACH)
-      return 0; // network is unreachable
-   // connect failed, but don't know why
-   return -1;

 }
 
 }
 

+

 int
 int

-wxDialUpManagerImpl::CheckIfconfig(void)
+wxDialUpManagerImpl::CheckProcNet()

 {
 {

-   int rc = -1;
+    // assume that the test doesn't work
+    int netDevice = NetDevice_Unknown;
+
+#ifdef __LINUX__
+    if (wxFileExists(wxT("/proc/net/route")))
+    {
+        // cannot use wxFile::Length because file doesn't support seeking, so
+        // use stdio directly
+        FILE *f = fopen("/proc/net/route", "rt");
+        if (f != NULL)
+        {
+            // now we know that we will find all devices we may have
+            netDevice = NetDevice_None;
+
+            char output[256];
+
+            while (fgets(output, 256, f) != NULL)
+            {
+                if ( strstr(output, "eth") ) // network card
+                {
+                    netDevice |= NetDevice_LAN;
+                }
+                else if (strstr(output,"ppp")   // ppp
+                        || strstr(output,"sl")  // slip
+                        || strstr(output,"pl")) // plip
+                {
+                    netDevice |= NetDevice_Modem;
+                }
+            }

 
 

-   // First time check for ifconfig location. We only use the variant which
-   // does not take arguments, a la GNU.
-   if ( m_CanUseIfconfig == -1 ) // unknown
-   {
-       static const wxChar *ifconfigLocations[] =
-       {
-           _T("/sbin"),         // Linux, FreeBSD
-           _T("/usr/sbin"),     // SunOS, Solaris, AIX, HP-UX
-           _T("/usr/etc"),      // IRIX
-       };
-
-       for ( size_t n = 0; n < WXSIZEOF(ifconfigLocations); n++ )
-       {
-           wxString path(ifconfigLocations[n]);
-           path << _T("/ifconfig");
-
-           if ( wxFileExists(path) )
-           {
-               m_IfconfigPath = path;
-               break;
-           }
-       }
-   }
+            fclose(f);
+        }
+    }
+#endif // __LINUX__

 
 

-   wxLogNull ln; // suppress all error messages
-   // Let´s try the ifconfig method first, should be fastest:
-   if(m_CanUseIfconfig != 0) // unknown or yes
-   {
-      wxASSERT(m_IfconfigPath.length());
+    return netDevice;
+}

 
 

-      wxString tmpfile = wxGetTempFileName("_wxdialuptest");
-      wxString cmd = "/bin/sh -c \'";
-      cmd << m_IfconfigPath;
-#if defined(__SOLARIS__) || defined (__SUNOS__)
-      // need to add -a flag
-      cmd << " -a";
-#elif defined(__LINUX__) || defined (__FREEBSD__) || defined(__SGI__)
-      // nothing to be added to ifconfig
+
+int
+wxDialUpManagerImpl::CheckIfconfig()
+{
+#ifdef __VMS
+    m_CanUseIfconfig = 0;
+    return -1;

 #else
 #else

-#     pragma warning "No ifconfig information for this OS."
-      m_CanUseIfconfig = 0;
-      return -1;
+    // assume that the test doesn't work
+    int netDevice = NetDevice_Unknown;
+
+    // first time check for ifconfig location
+    if ( m_CanUseIfconfig == -1 ) // unknown
+    {
+        static const wxChar *const ifconfigLocations[] =
+        {
+            wxT("/sbin"),         // Linux, FreeBSD, Darwin
+            wxT("/usr/sbin"),     // SunOS, Solaris, AIX, HP-UX
+            wxT("/usr/etc"),      // IRIX
+            wxT("/etc"),          // AIX 5
+        };
+
+        for ( size_t n = 0; n < WXSIZEOF(ifconfigLocations); n++ )
+        {
+            wxString path(ifconfigLocations[n]);
+            path << wxT("/ifconfig");
+
+            if ( wxFileExists(path) )
+            {
+                m_IfconfigPath = path;
+                break;
+            }
+        }
+    }
+
+    if ( m_CanUseIfconfig != 0 ) // unknown or yes
+    {
+        wxLogNull ln; // suppress all error messages
+
+        wxASSERT_MSG( m_IfconfigPath.length(),
+                      wxT("can't use ifconfig if it wasn't found") );
+
+        wxString tmpfile = wxFileName::CreateTempFileName( wxT("_wxdialuptest") );
+        wxString cmd = wxT("/bin/sh -c \'");
+        cmd << m_IfconfigPath;
+#if defined(__AIX__) || \
+    defined(__NETBSD__) || \
+    defined(__OSF__) || \
+    defined(__SOLARIS__) || defined (__SUNOS__)
+        // need to add -a flag
+        cmd << wxT(" -a");
+#elif defined(__LINUX__) || defined(__SGI__)
+        // nothing to be added to ifconfig
+#elif defined(__FREEBSD__) || defined(__DARWIN__)
+        // add -l flag
+        cmd << wxT(" -l");
+#elif defined(__HPUX__)
+        // VZ: a wild guess (but without it, ifconfig fails completely)
+        cmd << wxT(" ppp0");
+#else
+        #if defined(__GNUG__)
+            #warning "No ifconfig information for this OS."
+        #else
+            #pragma warning "No ifconfig information for this OS."
+        #endif
+
+        m_CanUseIfconfig = 0;
+        return -1;

 #endif
 #endif

-      cmd << " >" << tmpfile <<  '\'';
-      /* I tried to add an option to wxExecute() to not close stdout,
-         so we could let ifconfig write directly to the tmpfile, but
-         this does not work. That should be faster, as it doesn´t call
-         the shell first. I have no idea why. :-(  (KB) */
-      if(wxExecute(cmd,TRUE /* sync */) == 0)
-      {
-         m_CanUseIfconfig = 1;
-         wxFile file;
-         if( file.Open(tmpfile) )
-         {
-            char *output = new char [file.Length()+1];
-            output[file.Length()] = '\0';
-            if(file.Read(output,file.Length()) == file.Length())
+       cmd << wxT(" >") << tmpfile <<  wxT('\'');
+        /* I tried to add an option to wxExecute() to not close stdout,
+           so we could let ifconfig write directly to the tmpfile, but
+           this does not work. That should be faster, as it doesn't call
+           the shell first. I have no idea why. :-(  (KB) */
+        if ( wxExecute(cmd,true /* sync */) == 0 )
+        {
+            m_CanUseIfconfig = 1;
+            wxFFile file;
+            if( file.Open(tmpfile) )

             {
             {

-               // FIXME shouldn't we grep for "^ppp"? (VZ)
+                wxString output;
+                if ( file.ReadAll(&output) )
+                {
+                    // FIXME shouldn't we grep for "^ppp"? (VZ)
+
+                    bool hasModem = false,
+                         hasLAN = false;

 
 #if defined(__SOLARIS__) || defined (__SUNOS__)
 
 #if defined(__SOLARIS__) || defined (__SUNOS__)

-               // dialup device under SunOS/Solaris
-               rc = strstr(output,"ipdptp") != (char *)NULL;
+                    // dialup device under SunOS/Solaris
+                    hasModem = strstr(output.fn_str(),"ipdptp") != NULL;
+                    hasLAN = strstr(output.fn_str(), "hme") != NULL;

 #elif defined(__LINUX__) || defined (__FREEBSD__)
 #elif defined(__LINUX__) || defined (__FREEBSD__)

-               rc = strstr(output,"ppp")    // ppp
-                    || strstr(output,"sl")  // slip
-                    || strstr(output,"pl"); // plip
+                    hasModem = strstr(output.fn_str(),"ppp")    // ppp
+                        || strstr(output.fn_str(),"sl")  // slip
+                        || strstr(output.fn_str(),"pl"); // plip
+                    hasLAN = strstr(output.fn_str(), "eth") != NULL;

 #elif defined(__SGI__)  // IRIX
 #elif defined(__SGI__)  // IRIX

-               rc = strstr(output, "ppp"); // PPP
+                    hasModem = strstr(output.fn_str(), "ppp") != NULL; // PPP
+#elif defined(__HPUX__)
+                    // if could run ifconfig on interface, then it exists
+                    hasModem = true;

 #endif
 #endif

+
+                    netDevice = NetDevice_None;
+                    if ( hasModem )
+                        netDevice |= NetDevice_Modem;
+                    if ( hasLAN )
+                        netDevice |= NetDevice_LAN;
+                }
+                //else: error reading the file

             }
             }

-            file.Close();
-            delete [] output;
-         }
-         // else rc remains -1 as we don't know for sure
-      }
-      else // could not run ifconfig correctly
-         m_CanUseIfconfig = 0; // don´t try again
-      (void) wxRemoveFile(tmpfile);
-   }
-      return rc;
-}
+            //else: error opening the file
+        }
+        else // could not run ifconfig correctly
+        {
+            m_CanUseIfconfig = 0; // don't try again
+        }

 
 

-int
-wxDialUpManagerImpl::CheckPing(void)
-{
-   if(! m_CanUsePing)
-      return -1;
+        (void) wxRemoveFile(tmpfile);
+    }

 
 

-   // First time check for ping location. We only use the variant
-   // which does not take arguments, a la GNU.
-   if(m_CanUsePing == -1) // unknown
-   {
-      if(wxFileExists("/bin/ping"))
-         m_PingPath = "/bin/ping";
-      else if(wxFileExists("/usr/sbin/ping"))
-         m_PingPath = "/usr/sbin/ping";
-      if(! m_PingPath)
-      {
-         m_CanUsePing = 0;
-         return -1;
-      }
-   }
+    return netDevice;
+#endif
+}

 
 

-   wxLogNull ln; // suppress all error messages
-   wxASSERT(m_PingPath.length());
-   wxString cmd;
-   cmd << m_PingPath << ' ';
+wxDialUpManagerImpl::NetConnection wxDialUpManagerImpl::CheckPing()
+{
+    // First time check for ping location. We only use the variant
+    // which does not take arguments, a la GNU.
+    if(m_CanUsePing == -1) // unknown
+    {
+#ifdef __VMS
+        if (wxFileExists( wxT("SYS$SYSTEM:TCPIP$PING.EXE") ))
+            m_PingPath = wxT("$SYS$SYSTEM:TCPIP$PING");
+#elif defined(__AIX__)
+        m_PingPath = wxT("/etc/ping");
+#elif defined(__SGI__)
+        m_PingPath = wxT("/usr/etc/ping");
+#else
+        if (wxFileExists( wxT("/bin/ping") ))
+            m_PingPath = wxT("/bin/ping");
+        else if (wxFileExists( wxT("/usr/sbin/ping") ))
+            m_PingPath = wxT("/usr/sbin/ping");
+#endif
+        if (!m_PingPath)
+        {
+            m_CanUsePing = 0;
+        }
+    }
+
+    if(! m_CanUsePing)
+    {
+       // we didn't find ping
+       return Net_Unknown;
+    }
+
+    wxLogNull ln; // suppress all error messages
+    wxASSERT(m_PingPath.length());
+    wxString cmd;
+    cmd << m_PingPath << wxT(' ');

 #if defined(__SOLARIS__) || defined (__SUNOS__)
 #if defined(__SOLARIS__) || defined (__SUNOS__)

-   // nothing to add to ping command
-#elif defined(__LINUX__)
-   cmd << "-c 1 "; // only ping once
+    // nothing to add to ping command
+#elif defined(__AIX__) || \
+      defined (__BSD__) || \
+      defined(__LINUX__) || \
+      defined(__OSF__) || \
+      defined(__SGI__) || \
+      defined(__VMS)
+    cmd << wxT("-c 1 "); // only ping once
+#elif defined(__HPUX__)
+    cmd << wxT("64 1 "); // only ping once (need also specify the packet size)

 #else
 #else

-#   pragma warning "No Ping information for this OS."
-   m_CanUsePing = 0;
-   return -1;
+    #if defined(__GNUG__)
+        #warning "No Ping information for this OS."
+    #else
+        #pragma warning "No Ping information for this OS."
+    #endif
+
+    m_CanUsePing = 0;
+    return Net_Unknown;

 #endif
 #endif

-   cmd << m_BeaconHost;
-   if(wxExecute(cmd, TRUE /* sync */) == 0)
-      return 1;
-   else
-      return 0;
+    cmd << m_BeaconHost;
+    if(wxExecute(cmd, true /* sync */) == 0)
+        return Net_Connected;
+    else
+        return Net_No;

 }
 
 /* static */
 }
 
 /* static */

-wxDialUpManager *
-wxDialUpManager::Create(void)
+wxDialUpManager *wxDialUpManager::Create()

 {
    return new wxDialUpManagerImpl;
 }
 {
    return new wxDialUpManagerImpl;
 }