Clients in large and medium-sized enterprise information systems, the management of client PCs, is often a problem-prone link. As a result, many large companies have introduced a variety of distributed management systems, such as the Norton Antivirus,blackice Firewall for Anti-Virus, Microsoft's SMS (System Management Server), and so on, These systems will install the appropriate client software on the client side, are generally in the form of services, but for a variety of reasons, these services will stop running or the client does not install these client services, so that the management system will be overlooked, may cause problems, such as the inability to protect the virus to become a source of viruses, Cannot publish software for this client, cannot manage client PCs, and so on. Here, we provide a program that can periodically scan the network according to the IP address and report the status of a particular service.
This scheme uses the Microsoft.NET technology and also uses the Ado.net, WMI Management,xml in the. NET framework. Its core is a program written by VB.net and its two configuration files, the configuration file is XML format, the program by IP Scan Network, get the status of each system service, if the IP address does not correspond to the system, then ignore the IP, For systems that do not have a service or service to stop, we run the nbtstat command on another thread to get information such as its machine name, username, MAC address domain, etc. so that we can find the machine to solve the problem. Second, in order to save the results of the scan, we need a very small database ms-access or Ms-sql server can be, this article uses SQL2000. Finally, in order to show the results of the scan so that we can take action, here we use the form of web pages to show the results of the database.
1. Vb. NET Program
The program uses two XML-formatted configuration files that are read in when the program starts. One of the files defines the network segment that needs to be scanned, including the excluded address segments. Another file defines the information that connects the database and the definition of the data table. The contents of these two documents are as follows:
<IPLIST>
<IP lanid= "192.168.100." ><exp l= "1" h= "/>" </IP>
<IP lanid= "192.168.101."/>
<IP lanid= "192.168.102."/>
<IP lanid= "192.168.103."/>
<IP lanid= "192.168.104." ><exp l= "1" h= "a"/> </IP>
</IPLIST>
This file definition will scan 5 network segments, of which two network segments have some addresses to exclude (assigned to printers and other devices), for 192.168.100, we exclude from 1 to 30, for 192.168.104 We exclude 1 to 40.
<DBINFO>
<SERVER> DBServer </SERVER>
<DATABASE> DB </DATABASE>
<UID> a </UID>
<PWD> a </PWD>
<service table= "SERVICE" >service </SERVICE>
</DBINFO>
This file defines the information required to connect to the database
TAG meaning
<SERVER> the server name of the Scanservice database
<DATABASE> Scanservice Database name
<UID> the database user name used to update the Scanservice database
<PWD> the password for the database user to update the Scanservice database
<SERVICE> the tag's inner defines the name of the SERVICE we want to scan,
Here we assume that we want to scan the service name.
The Tag property defines the table name in the database that is used to save the scan results.
' First we define a class that is used primarily to get the status information of a service for an IP address and to trigger another thread to get details of the system when the service state is not normal.
Imports system.serviceprocess
Imports System.Xml
Imports System.Threading
Public Class GetStatus
Private Iservicename as String ' service name
Private Imachineip as String ' IP address
Private itable as String ' table name in Dateset
' Constructor
Sub New (ByVal Ip As String, ByVal Svcname as String, ByVal updatetable as String)
IMACHINEIP = Ip
Iservicename = Svcname
itable = updatetable
End Sub
' The method used by each thread to get the state of the service and trigger another thread to get the IP information if the state is not normal
Sub GETSTAUSF ()
Dim Servicep as New ServiceController () ' Instantiate a ServiceController class
Servicep.machinename = Imachineip
Servicep.servicename = Iservicename
Dim Myrow as DataRow
Dim status as String
Dim Run as Boolean = False
Myrow = ds. Tables (itable). NewRow
Try
If ServiceP.Status.ToString <> "Running" Then
Status = ServiceP.Status.ToString ' If the state is not running then assign the state to the string variable
Else
Run = True ' If the status is running, do nothing
End If
Catch er as Exception ' The exception that occurs when a state is processed
Status = Left (Er. Message, 35)
If InStr (status, Service control Manager) = 0 Then
Status = "Not installed or open service failed" ' does not have the service installed
ElseIf InStr (Er. Message, "Manager") > 0 Then
Status = "Can not detected" ' service state is not available
End If
End Try
Servicep.close () ' Close ServiceController instance
' The following determines that if the state is not running, the system is logged and the thread is triggered to get its details.
If not Run Then
Myrow ("msg") = Status
Myrow ("IP") = Imachineip
SyncLock GetType (addrow) ' To ensure multithreading, there is only one write operation on the dataset, locking AddRow class
Dim Addrowins as New addrow (myrow) ' inserts IP and state into the dataset through our own written AddRow class
End SyncLock
' Triggers another thread to get the machine information
Dim HostInfo2 as New hostinfo (IMACHINEIP)
Dim HOSTTHR2 as New Thread (new ThreadStart (AddressOf hostinfo2.sysinfo))
Hostthr2.start ()
SyncLock GetType (Hostinfothreadcounter)
Hostinfothreadcounter.counter + + 1 ' boot thread number plus 1
End SyncLock
End If
SyncLock GetType (Stoppcounter)
Stopthr.addstop ()
End SyncLock
End Sub
End Class
' This class has only one method, which is to reduce the number of threads stopped by 1
Class Stoppcounter
Sub Addstop ()
threadcounterstopped = threadcounterstopped + 1
End Sub
End Class
' This class is used to insert an existing row into the dataset
Class AddRow
' The first constructor to enter parameters for the constructed behavior
Sub New (ByVal row as DataRow)
Try
Ds. Tables (0). Rows.Add (Row)
Catch EE as Exception
End Try
End Sub
' second constructor, updating existing rows with a machine name, such as a string as a user name
Sub New (ByVal IP As String, ByVal user As String, ByVal hostname As String, ByVal Mac as String, ByVal domain as String, B Yval Timeout as Char)
Dim Rowtimeout as DataRow
Try
For each rowtimeout in DS. Tables (0). Select ("ip= '" & IP & "")
Rowtimeout.item ("lastuid") = User
Rowtimeout.item ("Name") = hostname
Rowtimeout.item ("mac") = Mac
Rowtimeout.item ("domain") = Domain
Rowtimeout.item ("Timeout") = Timeout ' Set Timeout flag to this Item
Exit for ' just run once
Next
Catch ER as Exception
End Try
End Sub
End Class
Because of space limitations, the code for the class that obtains machine information based on IP is omitted.
Imports system.threading ' is used to support multithreading
Imports System.Xml ' used to parse parameter files in XML format
Imports System.Data ' for saving results to the database
Module Module1
Public DS as New DataSet ()
Public conn1 as Sqlclient.sqlconnection ' database connection
Public ipf as String ' ip list file name
Public dbf as String ' database information file
Public threadcounterstopped as Integer
Public Stopthr as New Stoppcounter ()
Sub Main () ' program main program
Dim Machineip as String
Dim IPLISTF as New xml.xmldocument ()
Dim IPList as Xml.xmlnode
Dim Ipitem as Xml.xmlnode
Dim Dbinfof as New xml.xmldocument ()
Dim DBinfo as Xml.xmlnode
Dim Lanid as String
Dim I as Integer
Dim Timestart as Integer
Dim threadcounterstarted as Integer
threadcounterstarted = 0
threadcounterstopped = 0
Dim Server as String
Dim Database as String
Dim UID as String
Dim pwd as String
Dim table as String
Dim connstr, connstr1 as String
Dim ServiceName as String
Dim Purgestr as String
Try
Dbinfof.load (DBF) ' Read the database information file
Catch Nodb as Exception
MsgBox (Nodb. Message & "wrong DB info file name.")
Exit Sub
End Try
Try
Iplistf.load (IPF) ' Read IP list file
Catch Noip as Exception
MsgBox (Noip. Message & "Wrong IP list file name.")
Exit Sub
End Try
' Analyze Database information files
DBinfo = dbinfof.childnodes (0)
Server = dbinfo.childnodes (0). InnerText
Database = Dbinfo.childnodes (1). InnerText
UID = dbinfo.childnodes (2). InnerText
PWD = Dbinfo.childnodes (3). InnerText
ServiceName = Dbinfo.childnodes (4). InnerText
Table = Dbinfo.childnodes (4). Attributes (0). Value
' Construct the connection string based on the analysis
CONNSTR1 = "server=" & Server & ";d atabase=" & Database & "Uid=" & uid & ";p assword=" & pwd
Conn1 = New sqlclient.sqlconnection (connstr1) ' Instantiate database connection
Conn1. Open () opens the database connection
Dim sa as Sqlclient.sqldataadapter = New sqlclient.sqldataadapter ("SELECT * from" & Table, CONN1)
Dim Combu as New sqlclient.sqlcommandbuilder (SA)
Sa. Fill dataset with Fill (DS, table)
Ds. Clear () ' empty old data '
Dim IPAddress as String
' Analyze IP List files
IPList = iplistf.childnodes (0)
Dim Ai as Integer
Dim Ipexcepcount as Integer
Dim Ipexcep as Xml.xmlnode
For each ipitem in IPList. ChildNodes
Dim excep (2,) as Integer
Lanid = Ipitem. Attributes (0). Value ' Gets the network ID
For i = 2 to 254 ' from 2 to 254 constructs an IP address based on each network ID
Ai = 0
' The following judgment is to skip the reserved address section
If Ipitem. HasChildNodes Then
Ipexcepcount = Ipitem. Childnodes.count
ReDim excep (2, ipexcepCount-1)
For each ipexcep in Ipitem. ChildNodes
EXCEP (0, Ai) = CInt (ipexcep. Attributes (0). Value)
EXCEP (1, Ai) = CInt (ipexcep. Attributes (1). Value)
AI = ai + 1
Next
End If
For Ai = 0 to IpexcepCount-1
If i >= excep (0, AI) and I <= excep (1, AI) Then
Console.WriteLine ("Skip reserved Address:" & Lanid & i.ToString)
GoTo Skipip
End If
Next
Machineip = lanid & i.tostring ' IP address
' The following trigger line Cheng to get service status
Dim getst as New getstatus (MACHINEIP, ServiceName, table)
Dim Getstthread as New Thread (new ThreadStart (AddressOf GETST.GETSTAUSF))
Getstthread.start ()
threadcounterstarted = threadcounterstarted + 1 ' boot thread number plus 1
Console.WriteLine (Thread & Machineip &) started. Detection "& ServiceName)
' 100 threads per boot, program main thread stop 15 seconds, avoid too many threads causing memory overflow
If (threadcounterstarted Mod) = 0 Then
Console.WriteLine ("Wait .......")
Thread.CurrentThread.Sleep (15000)
Gc. Collect () ' Force garbage collection to Aviod outofmemory while run with long IP list
End If
SKIPIP:
Next
Next
Console.WriteLine ("Exiting program ...") ' all threads have been triggered
Finish:
Thread.CurrentThread.Sleep (5000) ' The following program waits for all threads to end
Gc. Collect ()
If threadcounterstopped = threadcounterstarted and Hostinfothreadcounter.counter = Hostinfothreadcounter.counterstop Then ' If the triggering thread equals the end thread
Dim Row as Data.datarow
For each row in DS. Tables (table). Rows
Row. Item ("systime") = Now
Next
purgestr = "Delete" & Table
Dim com1 as New Sqlclient.sqlcommand (PURGESTR, CONN1)
COM1. ExecuteNonQuery () ' Delete old records
Sa. InsertCommand = Combu. GetInsertCommand
Sa. Update (DS, table) writes new records to the database
Else
Goto Finish ' goto finish and wait another seconds
End If
End Sub
You can use the following command to start the program in a DOS window.
Scanservice–i iplist.xml–d Dbinfo.xml
2. Scanservice Database
The database holds the results of the save program running so that it can be displayed in the form of a web. Here is the script to create the table, including the domain name, username, machine name, IP and service status.
CREATE TABLE [dbo]. [Service] (
[IP] [varchar] (m) NULL,
State [varchar] (m) NULL,
[User Name] [varchar] (m) NULL,
[Machine name] [varchar] (m) NULL,
[MAC address] [varchar] (m) NULL,
[domain] [varchar] (NULL),
Timeout [varchar] (a) NULL,
[Time Ann] [DateTime] (8) NULL,
)
Summarize:
The above is a complete method, but also a relatively simple and clear solution, if the requirements of skills and performance, there are some places can do some improvement, such as the use of the thread pool. There are other areas that need to be done by yourself, such as presenting information in the database as a web.
