+// -*- c++ -*- ///////////////////////////////////////////////////////////////
+// Name: unix/net.cpp
+// Purpose: Network related wxWindows classes and functions
+// Author: Karsten Ballüder
+// Modified by:
+// Created: 03.10.99
+// RCS-ID: $Id$
+// Copyright: (c) Karsten Ballüder
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/setup.h"
+
+#if wxUSE_DIALUP_MANAGER
+
+#ifndef WX_PRECOMP
+# include "wx/defs.h"
+#endif // !PCH
+
+#include "wx/string.h"
+#include "wx/event.h"
+#include "wx/net.h"
+#include "wx/timer.h"
+#include "wx/filefn.h"
+#include "wx/utils.h"
+#include "wx/log.h"
+
+#include <stdlib.h>
+
+#include <signal.h>
+#include <fcntl.h>
+#include <unistd.h>
+#define __STRICT_ANSI__
+#include <sys/socket.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+// ----------------------------------------------------------------------------
+// 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
+// of this class in the program accessed via GetDialUpManager().
+// ----------------------------------------------------------------------------
+
+/* TODO
+ *
+ * 1. more configurability for Unix: i.e. how to initiate the connection, how
+ * to check for online status, &c.
+ * 2. add a "long Dial(long connectionId = -1)" function which asks the user
+ * about which connection to dial (this may be done using native dialogs
+ * under NT, need generic dialogs for all others) and returns the identifier
+ * of the selected connection (it's opaque to the application) - it may be
+ * reused later to dial the same connection later (or use strings instead of
+ * longs may be?)
+ * 3. add an async version of dialing functions which notify the caller about
+ * the progress (or may be even start another thread to monitor it)
+ * 4. the static creation/accessor functions are not MT-safe - but is this
+ * really crucial? I think we may suppose they're always called from the
+ * main thread?
+ */
+
+class WXDLLEXPORT wxDialUpManagerImpl : public wxDialUpManager
+{
+public:
+ wxDialUpManagerImpl()
+ {
+ m_IsOnline = -1; // unknown
+ m_timer = NULL;
+ m_CanUseIfconfig = -1; // unknown
+ m_BeaconHost = WXDIALUP_MANAGER_DEFAULT_BEACONHOST;
+ m_BeaconPort = 80;
+ }
+
+ /** Could the dialup manager be initialized correctly? If this function
+ 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
+ { 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
+ 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
+ @param password unused
+ */
+ virtual bool Dial(const wxString& nameOfISP,
+ const wxString& WXUNUSED(username),
+ const wxString& WXUNUSED(password));
+
+ /// Hang up the currently active dial up connection.
+ virtual bool HangUp();
+
+ // 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
+ {
+ if( (! m_timer) // we are not polling, so test now:
+ || m_IsOnline == -1
+ )
+ CheckStatus();
+ return m_IsOnline != 0;
+ }
+
+ // sometimes the built-in logic for determining the online status may fail,
+ // 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; }
+
+ // set misc wxDialUpManager options
+ // --------------------------------
+
+ // enable automatical checks for the connection status and sending of
+ // wxEVT_DIALUP_CONNECTED/wxEVT_DIALUP_DISCONNECTED events. The interval
+ // parameter is only for Unix where we do the check manually: under
+ // Windows, the notification about the change of connection status is
+ // instantenous.
+ //
+ // 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
+ // wxEVT_DIALUP_XXX events won't be sent any more neither.
+ virtual void DisableAutoCheckOnlineStatus();
+
+ // under Unix, the value of well-known host is used to check whether we're
+ // connected to the internet. It's unused under Windows, but this function
+ // is always safe to call. The default value is www.yahoo.com.
+ virtual void SetWellKnownHost(const wxString& hostname,
+ int portno = 80);
+ /** Sets the commands to start up the network and to hang up
+ again. Used by the Unix implementations only.
+ */
+ virtual void SetConnectCommand(const wxString &command, const wxString &hupcmd)
+ { m_ConnectCommand = command; m_HangUpCommand = hupcmd; }
+
+private:
+ /// -1: don´t know, 0 = no, 1 = yes
+ int m_IsOnline;
+
+ /// Can we use ifconfig to list active devices?
+ int m_CanUseIfconfig;
+ /// The path to ifconfig
+ wxString m_IfconfigPath;
+
+ /// beacon host:
+ wxString m_BeaconHost;
+ /// beacon host portnumber for connect:
+ int m_BeaconPort;
+
+ /// command to connect to network
+ wxString m_ConnectCommand;
+ /// command to hang up
+ wxString m_HangUpCommand;
+ /// name of ISP
+ wxString m_ISPname;
+ /// a timer for regular testing
+ class AutoCheckTimer *m_timer;
+
+ friend class AutoCheckTimer;
+ /// determine status
+ void CheckStatus(void) const;
+
+ /// real status check
+ void CheckStatusInternal(void);
+};
+
+
+class AutoCheckTimer : public wxTimer
+{
+public:
+ AutoCheckTimer(wxDialUpManagerImpl *dupman)
+ {
+ m_dupman = dupman;
+ m_started = FALSE;
+ }
+
+ virtual bool Start( int millisecs = -1 )
+ { m_started = TRUE; return wxTimer::Start(millisecs, FALSE); }
+
+ virtual void Notify()
+ { wxLogTrace("Checking dial up network status."); m_dupman->CheckStatus(); }
+
+ virtual void Stop()
+ { if ( m_started ) wxTimer::Stop(); }
+public:
+ bool m_started;
+ wxDialUpManagerImpl *m_dupman;
+};
+
+bool
+wxDialUpManagerImpl::Dial(const wxString &isp,
+ const wxString & WXUNUSED(username),
+ const wxString & WXUNUSED(password))
+{
+ if(m_IsOnline == 1)
+ return FALSE;
+ m_IsOnline = -1;
+ m_ISPname = isp;
+ wxString cmd;
+ if(m_ConnectCommand.Find("%s"))
+ cmd.Printf(m_ConnectCommand,m_ISPname.c_str());
+ else
+ cmd = m_ConnectCommand;
+ return wxExecute(cmd, /* sync */ TRUE) == 0;
+}
+
+bool
+wxDialUpManagerImpl::HangUp(void)
+{
+ if(m_IsOnline == 0)
+ return FALSE;
+ m_IsOnline = -1;
+ wxString cmd;
+ if(m_HangUpCommand.Find("%s"))
+ cmd.Printf(m_HangUpCommand,m_ISPname.c_str());
+ else
+ cmd = m_HangUpCommand;
+ return wxExecute(cmd, /* sync */ TRUE) == 0;
+}
+
+
+bool
+wxDialUpManagerImpl::EnableAutoCheckOnlineStatus(size_t nSeconds)
+{
+ wxASSERT(m_timer == NULL);
+ m_timer = new AutoCheckTimer(this);
+ bool rc = m_timer->Start(nSeconds*1000);
+ if(! rc)
+ {
+ delete m_timer;
+ m_timer = NULL;
+ }
+ return rc;
+}
+
+void
+wxDialUpManagerImpl::DisableAutoCheckOnlineStatus()
+{
+ wxASSERT(m_timer != NULL);
+ m_timer->Stop();
+ delete m_timer;
+ m_timer = NULL;
+}
+
+
+void
+wxDialUpManagerImpl::SetWellKnownHost(const wxString& hostname, int portno)
+{
+ /// does hostname contain a port number?
+ wxString port = hostname.After(':');
+ if(port.Length())
+ {
+ m_BeaconHost = hostname.Before(':');
+ m_BeaconPort = atoi(port);
+ }
+ else
+ {
+ m_BeaconHost = hostname;
+ m_BeaconPort = portno;
+ }
+}
+
+
+void
+wxDialUpManagerImpl::CheckStatus(void) 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)
+ {
+ if(m_IsOnline)
+ ; // send ev
+ else
+ ; // send ev
+ }
+}
+
+/*
+ We have three methods that we can use:
+
+ 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.
+
+*/
+
+void
+wxDialUpManagerImpl::CheckStatusInternal(void)
+{
+ m_IsOnline = -1;
+
+ // First time check for ifconfig location. We only use the variant
+ // which does not take arguments, a la GNU.
+ if(m_CanUseIfconfig == -1) // unknown
+ {
+ if(wxFileExists("/sbin/ifconfig"))
+ m_IfconfigPath = "/sbin/ifconfig";
+ else if(wxFileExists("/usr/sbin/ifconfig"))
+ m_IfconfigPath = "/usr/sbin/ifconfig";
+ }
+
+ // Let´s try the ifconfig method first, should be fastest:
+ if(m_CanUseIfconfig != 0) // unknown or yes
+ {
+ wxASSERT(m_IfconfigPath.length());
+
+ wxString tmpfile = wxGetTempFileName("_wxdialuptest");
+ wxString cmd = m_IfconfigPath;
+ cmd << " >" << tmpfile;
+ if(wxExecute(m_IfconfigPath,TRUE /* sync */) == 0)
+ {
+ m_CanUseIfconfig = 1;
+ wxString cmd1 = "grep ppp <"+tmpfile; // PPP
+ wxString cmd2 = "grep sl <"+tmpfile; // SLIP
+ wxString cmd3 = "grep pl <"+tmpfile; // PLIP
+ if(wxExecute(cmd1,TRUE) == 0
+ || wxExecute(cmd2,TRUE) == 0
+ || wxExecute(cmd3,TRUE) == 0
+ )
+ m_IsOnline = 1;
+ }
+ else // could not run ifconfig correctly
+ m_CanUseIfconfig = 0; // don´t try again
+ wxRemoveFile(tmpfile);
+ if(m_IsOnline != -1) // we are done
+ return;
+ }
+
+ // second method: try to connect to well known host:
+ struct hostent *hp;
+ struct sockaddr_in serv_addr;
+ int sockfd;
+
+ m_IsOnline = 0; // assume false
+ if((hp = gethostbyname(m_BeaconHost)) == NULL)
+ return; // 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_port = htons(m_BeaconPort);
+ if( ( sockfd = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0)
+ {
+ // sys_error("cannot create socket for gw");
+ return;
+ }
+ if( connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0)
+ {
+ //sys_error("cannot connect to server");
+ return;
+ }
+ //connected!
+ close(sockfd);
+}
+
+
+/* static */
+wxDialUpManager *
+wxDialUpManager::wxDialUpManager::Create(void)
+{
+ return new wxDialUpManagerImpl;
+}
+
+#endif // wxUSE_DIALUP_MANAGER
projects / wxWidgets.git / commitdiff
