If ping return > 0 does not mean connected, then what does ?

GEOSoft · October 18, 2010

All good points.

For DNS problems, I've often solved them by running "ipconfig /flushdns"

AlmarM · October 19, 2010

When using this script to check for local ip's

Global $sPath = @ScriptDir & "\Scanned IPs.txt"

_Scan()

Func _Scan()
    Local $aSplit = StringSplit(@IPAddress1, ".")
    Local $sIP = $aSplit[1] & "." & $aSplit[2] & "." & $aSplit[3] & "."
    Local $aValidIPs[256], $iIndex = 0, $sValidIPs

    If (FileExists($sPath)) Then FileDelete($sPath)

    FileWrite($sPath, "IP,            Error,        Result" & @CRLF)
    For $i = 0 To 256
        $iResult = Ping($sIP & $i, 500)

        If ($iResult >= 1) Then
            $aValidIPs[$iIndex] = $sIP & $i
            $sValidIPs &= $sIP & $i & @CRLF
            $iIndex += 1
        EndIf

        FileWrite($sPath, "" & $sIP & $i & "        " & @error & "        " & $iResult & @CRLF)
    Next

    ReDim $aValidIPs[$iIndex]
    FileWrite($sPath, @CRLF & @CRLF & "IP's with result >= 1" & @CRLF & $sValidIPs)
EndFunc

It wrote this file

IP,            Error,        Result
xxx.xxx.xxx.0        1        0
xxx.xxx.xxx.1        0        1
xxx.xxx.xxx.2        1        0
xxx.xxx.xxx.3        1        0
xxx.xxx.xxx.4        1        0
xxx.xxx.xxx.5        1        0
xxx.xxx.xxx.6        1        0
xxx.xxx.xxx.7        0        1
xxx.xxx.xxx.8        1        0
xxx.xxx.xxx.9        1        0
xxx.xxx.xxx.10        1        0
xxx.xxx.xxx.11        1        0
xxx.xxx.xxx.12        1        0
xxx.xxx.xxx.13        1        0
xxx.xxx.xxx.14        1        0
xxx.xxx.xxx.15        1        0
xxx.xxx.xxx.16        0        1
xxx.xxx.xxx.17        1        0
xxx.xxx.xxx.18        1        0
xxx.xxx.xxx.19        1        0
xxx.xxx.xxx.20        1        0
xxx.xxx.xxx.21        1        0
xxx.xxx.xxx.22        1        0
xxx.xxx.xxx.23        1        0
xxx.xxx.xxx.24        0        1
xxx.xxx.xxx.25        1        0
xxx.xxx.xxx.26        0        189
xxx.xxx.xxx.27        0        1
xxx.xxx.xxx.28        0        302
xxx.xxx.xxx.29        0        1
xxx.xxx.xxx.30        1        0
xxx.xxx.xxx.31        0        1
xxx.xxx.xxx.32        0        1
xxx.xxx.xxx.33        1        0
xxx.xxx.xxx.34        0        1
xxx.xxx.xxx.35        0        1
xxx.xxx.xxx.36        1        0
xxx.xxx.xxx.37        1        0
xxx.xxx.xxx.38        0        2
xxx.xxx.xxx.39        0        305
xxx.xxx.xxx.40        0        1
xxx.xxx.xxx.41        1        0
xxx.xxx.xxx.42        1        0
xxx.xxx.xxx.43        1        0
xxx.xxx.xxx.44        1        0
xxx.xxx.xxx.45        1        0
xxx.xxx.xxx.46        1        0
xxx.xxx.xxx.47        0        161
xxx.xxx.xxx.48        1        0
xxx.xxx.xxx.49        1        0
xxx.xxx.xxx.50        1        0
xxx.xxx.xxx.51        1        0
xxx.xxx.xxx.52        1        0
xxx.xxx.xxx.53        0        1
xxx.xxx.xxx.54        0        1
xxx.xxx.xxx.55        1        0
xxx.xxx.xxx.56        0        294
xxx.xxx.xxx.57        1        0
xxx.xxx.xxx.58        1        0
xxx.xxx.xxx.59        1        0
xxx.xxx.xxx.60        1        0
xxx.xxx.xxx.61        1        0
xxx.xxx.xxx.62        0        208
xxx.xxx.xxx.63        0        1
xxx.xxx.xxx.64        1        0
xxx.xxx.xxx.65        1        0
xxx.xxx.xxx.66        1        0
xxx.xxx.xxx.67        1        0
xxx.xxx.xxx.68        1        0
xxx.xxx.xxx.69        1        0
xxx.xxx.xxx.70        1        0
xxx.xxx.xxx.71        1        0
xxx.xxx.xxx.72        1        0
xxx.xxx.xxx.73        1        0
xxx.xxx.xxx.74        1        0
xxx.xxx.xxx.75        1        0
xxx.xxx.xxx.76        1        0
xxx.xxx.xxx.77        1        0
xxx.xxx.xxx.78        1        0
xxx.xxx.xxx.79        1        0
xxx.xxx.xxx.80        1        0
xxx.xxx.xxx.81        1        0
xxx.xxx.xxx.82        1        0
xxx.xxx.xxx.83        1        0
xxx.xxx.xxx.84        1        0
xxx.xxx.xxx.85        1        0
xxx.xxx.xxx.86        1        0
xxx.xxx.xxx.87        1        0
xxx.xxx.xxx.88        1        0
xxx.xxx.xxx.89        1        0
xxx.xxx.xxx.90        1        0
xxx.xxx.xxx.91        1        0
xxx.xxx.xxx.92        1        0
xxx.xxx.xxx.93        1        0
xxx.xxx.xxx.94        1        0
xxx.xxx.xxx.95        1        0
xxx.xxx.xxx.96        1        0
xxx.xxx.xxx.97        0        1
xxx.xxx.xxx.98        1        0
xxx.xxx.xxx.99        1        0
xxx.xxx.xxx.100        0        1
xxx.xxx.xxx.101        1        0
xxx.xxx.xxx.102        1        0
xxx.xxx.xxx.103        0        1
xxx.xxx.xxx.104        1        0
xxx.xxx.xxx.105        1        0
xxx.xxx.xxx.106        1        0
xxx.xxx.xxx.107        1        0
xxx.xxx.xxx.108        1        0
xxx.xxx.xxx.109        1        0
xxx.xxx.xxx.110        1        0
xxx.xxx.xxx.111        1        0
xxx.xxx.xxx.112        1        0
xxx.xxx.xxx.113        1        0
xxx.xxx.xxx.114        1        0
xxx.xxx.xxx.115        1        0
xxx.xxx.xxx.116        1        0
xxx.xxx.xxx.117        1        0
xxx.xxx.xxx.118        1        0
xxx.xxx.xxx.119        1        0
xxx.xxx.xxx.120        1        0
xxx.xxx.xxx.121        1        0
xxx.xxx.xxx.122        1        0
xxx.xxx.xxx.123        1        0
xxx.xxx.xxx.124        1        0
xxx.xxx.xxx.125        1        0
xxx.xxx.xxx.126        1        0
xxx.xxx.xxx.127        1        0
xxx.xxx.xxx.128        1        0
xxx.xxx.xxx.129        1        0
xxx.xxx.xxx.130        1        0
xxx.xxx.xxx.131        1        0
xxx.xxx.xxx.132        1        0
xxx.xxx.xxx.133        1        0
xxx.xxx.xxx.134        1        0
xxx.xxx.xxx.135        1        0
xxx.xxx.xxx.136        1        0
xxx.xxx.xxx.137        1        0
xxx.xxx.xxx.138        1        0
xxx.xxx.xxx.139        1        0
xxx.xxx.xxx.140        1        0
xxx.xxx.xxx.141        1        0
xxx.xxx.xxx.142        1        0
xxx.xxx.xxx.143        1        0
xxx.xxx.xxx.144        1        0
xxx.xxx.xxx.145        1        0
xxx.xxx.xxx.146        1        0
xxx.xxx.xxx.147        1        0
xxx.xxx.xxx.148        1        0
xxx.xxx.xxx.149        1        0
xxx.xxx.xxx.150        1        0
xxx.xxx.xxx.151        1        0
xxx.xxx.xxx.152        1        0
xxx.xxx.xxx.153        1        0
xxx.xxx.xxx.154        1        0
xxx.xxx.xxx.155        1        0
xxx.xxx.xxx.156        1        0
xxx.xxx.xxx.157        1        0
xxx.xxx.xxx.158        1        0
xxx.xxx.xxx.159        1        0
xxx.xxx.xxx.160        1        0
xxx.xxx.xxx.161        1        0
xxx.xxx.xxx.162        1        0
xxx.xxx.xxx.163        1        0
xxx.xxx.xxx.164        1        0
xxx.xxx.xxx.165        1        0
xxx.xxx.xxx.166        1        0
xxx.xxx.xxx.167        1        0
xxx.xxx.xxx.168        1        0
xxx.xxx.xxx.169        1        0
xxx.xxx.xxx.170        1        0
xxx.xxx.xxx.171        1        0
xxx.xxx.xxx.172        1        0
xxx.xxx.xxx.173        1        0
xxx.xxx.xxx.174        1        0
xxx.xxx.xxx.175        1        0
xxx.xxx.xxx.176        1        0
xxx.xxx.xxx.177        1        0
xxx.xxx.xxx.178        1        0
xxx.xxx.xxx.179        1        0
xxx.xxx.xxx.180        1        0
xxx.xxx.xxx.181        1        0
xxx.xxx.xxx.182        1        0
xxx.xxx.xxx.183        1        0
xxx.xxx.xxx.184        1        0
xxx.xxx.xxx.185        1        0
xxx.xxx.xxx.186        1        0
xxx.xxx.xxx.187        1        0
xxx.xxx.xxx.188        1        0
xxx.xxx.xxx.189        1        0
xxx.xxx.xxx.190        1        0
xxx.xxx.xxx.191        1        0
xxx.xxx.xxx.192        1        0
xxx.xxx.xxx.193        1        0
xxx.xxx.xxx.194        1        0
xxx.xxx.xxx.195        1        0
xxx.xxx.xxx.196        1        0
xxx.xxx.xxx.197        1        0
xxx.xxx.xxx.198        1        0
xxx.xxx.xxx.199        1        0
xxx.xxx.xxx.200        1        0
xxx.xxx.xxx.201        1        0
xxx.xxx.xxx.202        1        0
xxx.xxx.xxx.203        1        0
xxx.xxx.xxx.204        1        0
xxx.xxx.xxx.205        1        0
xxx.xxx.xxx.206        1        0
xxx.xxx.xxx.207        1        0
xxx.xxx.xxx.208        1        0
xxx.xxx.xxx.209        1        0
xxx.xxx.xxx.210        1        0
xxx.xxx.xxx.211        1        0
xxx.xxx.xxx.212        1        0
xxx.xxx.xxx.213        1        0
xxx.xxx.xxx.214        1        0
xxx.xxx.xxx.215        1        0
xxx.xxx.xxx.216        1        0
xxx.xxx.xxx.217        1        0
xxx.xxx.xxx.218        1        0
xxx.xxx.xxx.219        1        0
xxx.xxx.xxx.220        0        5
xxx.xxx.xxx.221        1        0
xxx.xxx.xxx.222        1        0
xxx.xxx.xxx.223        1        0
xxx.xxx.xxx.224        1        0
xxx.xxx.xxx.225        1        0
xxx.xxx.xxx.226        1        0
xxx.xxx.xxx.227        1        0
xxx.xxx.xxx.228        1        0
xxx.xxx.xxx.229        1        0
xxx.xxx.xxx.230        1        0
xxx.xxx.xxx.231        1        0
xxx.xxx.xxx.232        1        0
xxx.xxx.xxx.233        1        0
xxx.xxx.xxx.234        1        0
xxx.xxx.xxx.235        1        0
xxx.xxx.xxx.236        1        0
xxx.xxx.xxx.237        1        0
xxx.xxx.xxx.238        1        0
xxx.xxx.xxx.239        1        0
xxx.xxx.xxx.240        1        0
xxx.xxx.xxx.241        1        0
xxx.xxx.xxx.242        1        0
xxx.xxx.xxx.243        1        0
xxx.xxx.xxx.244        1        0
xxx.xxx.xxx.245        1        0
xxx.xxx.xxx.246        1        0
xxx.xxx.xxx.247        1        0
xxx.xxx.xxx.248        1        0
xxx.xxx.xxx.249        1        0
xxx.xxx.xxx.250        1        0
xxx.xxx.xxx.251        1        0
xxx.xxx.xxx.252        1        0
xxx.xxx.xxx.253        1        0
xxx.xxx.xxx.254        0        2
xxx.xxx.xxx.255        1        0
xxx.xxx.xxx.256        4        0


IP's with result >= 1
xxx.xxx.xxx.1
xxx.xxx.xxx.7
xxx.xxx.xxx.16
xxx.xxx.xxx.24
xxx.xxx.xxx.26
xxx.xxx.xxx.27
xxx.xxx.xxx.28
xxx.xxx.xxx.29
xxx.xxx.xxx.31
xxx.xxx.xxx.32
xxx.xxx.xxx.34
xxx.xxx.xxx.35
xxx.xxx.xxx.38
xxx.xxx.xxx.39
xxx.xxx.xxx.40
xxx.xxx.xxx.47
xxx.xxx.xxx.53
xxx.xxx.xxx.54
xxx.xxx.xxx.56
xxx.xxx.xxx.62
xxx.xxx.xxx.63
xxx.xxx.xxx.97
xxx.xxx.xxx.100
xxx.xxx.xxx.103
xxx.xxx.xxx.220
xxx.xxx.xxx.254

So all IP's listed under "IP's with result >= 1" (except for 254) could be possible local PCs?

Edited October 19, 2010 by AlmarM

willichan · October 19, 2010

So all IP's listed under "IP's with result >= 1" (except for 254) could be possible local PCs?

That would depend on what the first three octets are, but assuming you are pinging a private address range, then yes.

Any of the following ranges would definitely be private/local LAN/WAN addresses:

10.0.0.0 - 10.255.255.255

127.16.0.0 - 172.31.255.255

192.168.0.0 - 192.168.255.255

169.254.0.0 - 169.254.255.255 (special case where a DHCP client cannot find a DHCP server)

These would refer to your local PC (not needing a network connection at all):

127.0.0.1 - 127.255.255.255

Pinging either of these two addresses could receive responses from just about anywhere, and are not useful for pinging:

0.0.0.0

255.255.255.255

There are some other special use IP addresses out there, but these are the main ones to worry about.

---Edit---

Keep in mind that @IPAddress1 gives you the first IP address assigned to your PC. It could be your local LAN, It could be an IP from wireless, from a broadband connection, or from a VPN connection. You might have both a private address and a public one. There is no way to know which one @IPAddress1 is returning. In my work, I commonly see PCs with one local LAN IP(private), one broadband IP(public), and one VPN IP(private).

Edited October 19, 2010 by willichan

AlmarM · October 19, 2010

Ahh, ok.

I only used @IPAddress1.

I totally forgot that @IPAddress .1 to .256 isn't the only IP on the local network.

Mithrandir · October 20, 2010

Even though your problem seems to have been solved, I would like to add that I also use _GetIP from INet Management UDF to check whether I'm connected or not or also if my IP changed -I have dynamic IP-

#include <Inet.au3>
$PublicIP = _GetIP()
While @error = 1
   $PublicIP = _GetIP()
WEnd
MsgBox(0, "IP Address", "Your IP Address is: " & $PublicIP)

Ianh · December 15, 2011

Hi All,

I have had a similar problem, complied a program in XP and always works with he ping function. I am writing an connection application for a 3G module.

If connected the returns "0" for @error and a number greater the "0" for the return.

However the same program moved to Windows 7 - when I have disconnected my 3G connecton - it reports "0" for @error and "1" for the return of the ping. If I then connect it reports "0" for @error and a number greater the "0" for the return.

The problem is that I cannot use an IF statement of IF $var > "1" as when the connection is FAST I recieve 1ms ping response and the connection thinks it is disconnected.

very frustrating........

any help would be great.

;-------------------------  IF SIGNAL STRENGHT IS OK CONTINUE WITH DIAG
   If $Signal > 7 Then
    filewriteline($filelog,"Signal greater then 7% starting loop" & @CRLF)
    TraySetToolTip("Signal greater then 7% starting loop")
    ; Msgbox(0, "Debug","Starting ping in loop as signal strenght is greater then treshold value was : " & $asResult[0])
    ping($DecryptIP)
    ping($DecryptIP)
    ping($DecryptIP)
;-------------------------  Run Ping and log profiles
    CMDAndLog('netsh mbn show signal interface="Mobile Broadband Connection"', -1, True)
    RunWait(@ComSpec & " /c " & "ping " & $DecryptIP & " >>log.txt", @ScriptDir, @SW_HIDE)
    $rc = _RunDos("ping " & $DecryptIP & @ScriptDir & " >> " & $filelog & @CRLF)
    CMDAndLog('ping ' & $DecryptIP , -1, True)
    Sleep(2000)
    ;$DecryptIP = "203.124.94.23"
    $var = Ping($DecryptIP,2000)
;~   MsgBox(0,'@@ Debug  propoer ping', '$DecryptIP = ' & $var & @crlf & '>Error code: ' & @error & @crlf) ;### Debug Console
;~   MsgBox (0, "google ping", Ping ("www.google.com.au"))
;~   MsgBox (0, "error of google",@error )
;~   MsgBox (0, "proper ping", Ping ($DecryptIP))
;~   MsgBox (0, "error of propper",@error)
;~   MsgBox (0, "", "Ping Online, roundtrip was: " & $var)
;~   MsgBox(262144,'Debug line ~' & @ScriptLineNumber,'Selection:' & @lf & '$DecryptIP' & @lf & @lf & 'Return:' & @lf & $DecryptIP) ;### Debug MSGBOX
;~   MsgBox(262144,'Debug line ~' & @ScriptLineNumber,'Selection:' & @lf & 'Ping($DecryptIP,2000)' & @lf & @lf & 'Return:' & @lf & Ping($DecryptIP,2000)) ;### Debug MSGBOX
;~   FileWriteLine($filelog,"Ping Online, roundtrip was: " & $var)
;-------------------------  IF PING FAILS CHECK CONNECTION STATUS
     ; Msgbox(0, "Debug","ping state loop will begin next")
     If $var > 1 Then
      TraySetToolTip("Ping is OK")
      ; Msgbox(0,"Status","Online, roundtrip was: " & $var & "  error  " & @error & "  count " & $i & @CRLF & " Ping is OK loop terminated and unit will now sleep") ; re-enstate this to check the time of the ping and check any errors of the system.
      $i = $i + 1
      FileWriteLine($filelog,"Connection is operating as normal sleeping for 2 minutes" & @CRLF & @CRLF)
     Else
      TraySetToolTip("Ping failed stratign remove seqence")
;-------------------------   IF CONNECTION IS FALSE AND THE CONNECTION MANAGER IS NOT IN A CORRECT STATE THEN PROCESS WILL BEGIN TO REBUILD CONNECTIOIN
      CMDAndLog('------------ Beginning of Reset cycle ! -----------------', -1, True)
      TraySetIcon(@ScriptDir & "\Signal_NOe.ico")
      TraySetToolTip("Rebuilding connection")
      TraySetState(4)
      Sleep (2000)
      Msgbox(0, "Debug Network Connect","removing profile")
      Remove()
      sleep (2000)
      Msgbox(0, "Debug Network Connect", "resetting device")
      ;RunWait(@ComSpec & " /c " & "device.bat disable >>log.txt", @ScriptDir, @SW_HIDE)
      CMDAndLog('device.bat disable', -1, True)
      sleep(4000)
      sleep (6000)
      ;$rc = _RunDos("net stop WwanSvc >> log.txt")
      CMDAndLog('net stop WwanSvc',-1,True)
      sleep (2000)
      ;$rc = _RunDos("net start WwanSvc >> log.txt")
      CMDAndLog('net start WwanSvc',-1,True)
      sleep(2000)
      ; Msgbox(0, "Debug Network Connect", "enabling device")
      ;RunWait(@ComSpec & " /c " & "device.bat enable >>log.txt", @ScriptDir, @SW_HIDE)
      CMDAndLog('device.bat enable',-1,True)
      sleep(4000)
      MsgBox (64, "user", " User name used is '" & $DecryptUserName & "'")
      if $DecryptUserName <> "" Then
       ;$rc = _RunDos("branding.cmd " & @ScriptDir & "\3gIcon.ico" & " -a " & $DecryptAPN & " -u " & $DecryptUserName & " -p " & $DecryptPassword & ">>log.txt")
       CMDAndLog("branding.cmd " & @ScriptDir & "\3gIcon.ico" & " -a " & $DecryptAPN & " -u " & $DecryptUserName & " -p " & $DecryptPassword & ">>log.txt",-1,True)
       Else
       ;$rc = _RunDos("branding.cmd " & @ScriptDir & "\3gIcon.ico" & " -a " & $DecryptAPN );& " -u " & $DecryptUserName & " -p " & $DecryptPassword & ">>log.txt")
       CMDAndLog("branding.cmd " & @ScriptDir & "\3gIcon.ico" & " -a " & $DecryptAPN,-1,True)
      EndIf
      $i = $i + 1
      $reset = $reset + 1
      ; Msgbox(0, "Debug Network Connect", "writing count to file")
      filewrite($filelog," Reset Count now at : " & $reset & @CRLF)
      EndIf
      EndIf
$Ping = Ping($DecryptIP,2000)
$error = @error
If $Ping Then
Select
   Case $Signal <= 7
   TraySetIcon(@ScriptDir & "\Signal_NO.ico")
   TraySetToolTip("3G Signal strenght Not available in this area")
   TraySetState(8) ; Show the tray icon
   Case $Signal > 7 AND $Signal <= 30
   TraySetIcon(@ScriptDir & "\Signal_low.ico")
   TraySetToolTip("Signal Strength low: - " & $signal & " %")
   TraySetState(8) ; Show the tray icon
   Case $Signal > 30 AND $Signal <= 70
   TraySetIcon(@ScriptDir & "\Signal_50.ico")
   TraySetToolTip("Signal Strength Medium: - " & $signal & " %")
   TraySetState(8) ; Show the tray icon
  Case $Signal > 80
   TraySetIcon(@ScriptDir & "\Signal_100.ico")
   TraySetToolTip("Signal Strength Excellent - " & $signal & " %")
   TraySetState(8) ; Show the tray icon
EndSelect
Else
TraySetIcon(@ScriptDir & "\Signal_NOe.ico")
TraySetToolTip("Connection not available in this area, system will re-try when Proper Signal is available.")
TraySetState(8)
EndIf
TraySetToolTip("sleeping before next cycle")
; Msgbox(0, "Debug Sleep", "Begin Sleep")
sleep (120000)
WEnd
fileclose($filelog)

willichan · December 15, 2011

Posting to an old (over 1 year) post won't get you as many responses as you might hope. You should really create a new topic.

Did you look at all of the points mentioned in

Bert · December 15, 2011

why not have a site you can pull something small down such as a picture. If it can't get to the picture then have a sleep built in and then try again. That way when you get the file you know your connected.

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If ping return > 0 does not mean connected, then what does ?

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