/// <summary>
/// loads /etc/default/isc-dhcp-server file
/// </summary>
public void LoadEtcDefaultConfigFile()
{
this.newEtcDefaultConfig = null;
IOController.Log(this, "LoadEtcDefaultConfigFile enter", Flag.debug);
if (OsIsUnix)
{
if (this.settings.IsDHCPServerInstalled)
{
if (File.Exists("/etc/default/isc-dhcp-server"))
{
IOController.Log(this, "LoadEtcDefaultConfig", Flag.debug);
ReadConfigFileDelegate readConfigFileDelegate = new ReadConfigFileDelegate(ProcessConfigFile);
IAsyncResult readConfigFileDelegateResult = readConfigFileDelegate.BeginInvoke("/etc/default/isc-dhcp-server", processEtcDefaultConfigFile, null);
}
else
{
IOController.Log(this, "FileNotFoundException /etc/default/isc-dhcp-server", Flag.error);
throw new FileNotFoundException("/etc/default/isc-dhcp-server" + " not found.");
}
}
else
{
IOController.Log(this, "DHCP Server not installed", Flag.error);
throw new System.Exception("DHCP Server not installed");
}
}
else
{
IOController.Log(this, "System in not a Unix environment", Flag.error);
throw new System.Exception("System in not a Unix environment");
}
}
/// <summary>
/// initialises a bash process in shellProc
/// </summary>
public void InitShell()
{
IOController.Log(this, "OS: " + Environment.OSVersion.ToString(), Flag.status);
if (Environment.OSVersion.ToString().Contains("Unix"))
{
this.OsIsUnix = true;
// initialize bash process
this.shellProc = new Process();
this.shellStartInfo = new ProcessStartInfo();
this.shellStartInfo.FileName = "/bin/bash";
this.shellStartInfo.UseShellExecute = false;
this.shellStartInfo.RedirectStandardOutput = true;
this.shellStartInfo.Arguments = "-c \"whoami\"";
this.shellProc.StartInfo = this.shellStartInfo;
this.shellProc.Start();
// check if application was started with su privilleges
string username = this.shellProc.StandardOutput.ReadToEnd();
username = Regex.Replace(username, @"\s+", "");
if (username == "root")
{
this.UserIsSU = true;
}
else
{
this.UserIsSU = false;
}
}
else
{
this.OsIsUnix = false;
}
}
/// <summary>
/// edites the config of /etc/default/isc-dhcp-server to set the seletc interface
/// </summary>
/// <param name="ar"></param>
private void processEtcDefaultConfigFile(IAsyncResult ar)
{
IOController.Log(this, "processEtcDefaultConfigFile entered", IOController.Flag.debug);
AsyncResult aResult = (AsyncResult)ar;
ReadConfigFileDelegate readConfigFileDelegate = (ReadConfigFileDelegate)aResult.AsyncDelegate;
ArrayList filecontent = readConfigFileDelegate.EndInvoke(ar);
IOController.Log(this, "processDefaultConfigFile filecontent: " + String.Join(",", filecontent), Flag.debug);
newEtcDefaultConfig = new ArrayList();
newEtcDefaultConfig.Add("#configfile /etc/default/isc-dhcp-server modified by GM4D");
foreach (string line in filecontent)
{
string trimmedline = line.Trim();
if (trimmedline.StartsWith("#INTERFACES"))
{
trimmedline = "INTERFACES=\"" + this.settings.OverviewSelectedInterfaceName + "\"";
}
else if (trimmedline.StartsWith("INTERFACES"))
{
trimmedline = "INTERFACES=\"" + this.settings.OverviewSelectedInterfaceName + "\"";
}
newEtcDefaultConfig.Add(trimmedline);
}
IOController.Log(this, "newEtcDefaultConfig created:\n" + string.Join("\n", newEtcDefaultConfig), Flag.debug);
}
/// <summary>
/// adds a new HoatNIC to the arraylist
/// </summary>
/// <param name="nic">interface as HostNIC</param>
public void AddInterface(HostNIC nic)
{
this.interfaces.Add(nic);
IOController.Log(this, "Added Interface at " + (this.interfaces.Count - 1) + ":\n" + nic.ToString() + "\n", IOController.Flag.status);
if (InterfaceAddedEvt != null)
{
InterfaceAddedEvt(this.interfaces, new PropertyChangedEventArgs("InterfaceAdded"));
}
}
/// <summary>
/// loads DHCP setting from file with filename
/// </summary>
/// <param name="filename">path and filename as string</param>
public void LoadSettingsFile(String filename)
{
if (File.Exists(filename))
{
IOController.Log(this, "LoadSettingsFile filename: " + filename, Flag.status);
ReadConfigFileDelegate readConfigFileDelegate = new ReadConfigFileDelegate(ProcessConfigFile);
IAsyncResult readConfigFileDelegateResult = readConfigFileDelegate.BeginInvoke(filename, parseConfig, null);
}
else
{
throw new FileNotFoundException(filename + " not found.");
}
}
/// <summary>
/// makes backup of /etc/default/isc-dhcp-server and writes new /etc/default/isc-dhcp-server file
/// </summary>
/// <param name="ar"></param>
private void writeEtcDefaultConfigFileComplete(IAsyncResult ar)
{
if (OsIsUnix)
{
shellStartInfo.Arguments = "-c \"gksudo cp /etc/default/isc-dhcp-server /etc/default/isc-dhcp-server.bak;gksudo mv " + Environment.CurrentDirectory.ToString() + "/gm4d-isc-dhcp-server /etc/default/isc-dhcp-server\"";
shellProc.Start();
IOController.Log(this, "new /etc/default/isc-dhcp-server applied " + shellProc.StandardOutput.ReadToEnd(), Flag.debug);
shellProc.WaitForExit();
}
else
{
throw new System.Exception("System is not a Unix environment");
}
}
/// <summary>
/// retrieves selected interface from /etc/default/isc-dhcp-server file
/// </summary>
public void GetSelectedInterfaceFromEtcDefault()
{
IOController.Log(this, "GetSelectedInterfaceFromEtcDeafult enter", Flag.debug);
this.settings.SelectInterface(0);
if (OsIsUnix)
{
if (this.settings.IsDHCPServerInstalled)
{
if (File.Exists("/etc/default/isc-dhcp-server"))
{
ArrayList filecontent = ProcessConfigFile("/etc/default/isc-dhcp-server");
IOController.Log(this, "ProcessConfigFile returned: filecontent: " + String.Join(",", filecontent), Flag.debug);
foreach (string line in filecontent)
{
string trimmedline = line.Trim();
if (trimmedline.StartsWith("INTERFACES"))
{
IOController.Log(this, "found INTERFACES entry " + trimmedline, IOController.Flag.debug);
if (trimmedline.Length > 13)
{
string foundInterfaceId = trimmedline.Remove(0, 11);
foundInterfaceId = foundInterfaceId.Trim('"');
IOController.Log(this, "getting index for " + foundInterfaceId, Flag.debug);
for (int i = 0; i < this.settings.Interfaces.Count; i++)
{
IOController.Log(this, ((HostNIC)this.settings.Interfaces[i]).Id + " ?= " + foundInterfaceId, Flag.debug);
if (((HostNIC)this.settings.Interfaces[i]).Id == foundInterfaceId)
{
IOController.Log(this, "found matching interface id " + foundInterfaceId + " index " + i, Flag.status);
this.settings.SelectInterface(i);
break;
}
}
}
}
}
}
else
{
IOController.Log(this, "FileNotFoundException /etc/default/isc-dhcp-server", Flag.error);
}
}
else
{
IOController.Log(this, "DHCP Server not installed", Flag.error);
}
}
}
/// <summary>
/// sets a static host ip
/// </summary>
public void SetNewHostIp()
{
if (OsIsUnix)
{
SaveSettingsFile(Environment.CurrentDirectory.ToString() + "/dhcpd.gm4d");
shellStartInfo.Arguments = string.Format("-c \"gksudo ifconfig " + ((HostNIC)this.settings.Interfaces[this.settings.SelectedInterfaceIndex]).Id + " " + this.settings.NewHostIP + " netmask " + this.settings.NewHostSubnetMask + "\"");
shellProc.Start();
IOController.Log(this, "SetNewHostIp " + shellProc.StandardOutput.ReadToEnd(), Flag.debug);
shellProc.WaitForExit();
GetHostInfo();
}
else
{
throw new System.Exception("System is not a Unix environment");
}
}
/// <summary>
/// restarts the dhcpd service
/// </summary>
public void RestartDHCPServer()
{
if (OsIsUnix && this.settings.IsDHCPServerRunning)
{
SaveSettingsFile(Environment.CurrentDirectory.ToString() + "/dhcpd.gm4d");
shellStartInfo.Arguments = string.Format("-c \"gksudo service isc-dhcp-server restart\"");
shellProc.Start();
IOController.Log(this, "RestartDHCPServer " + shellProc.StandardOutput.ReadToEnd(), Flag.debug);
shellProc.WaitForExit();
GetDHCPServerStatus();
}
else
{
throw new System.Exception("System is not a Unix environment");
}
}
/// <summary>
/// processes the content of the dhcpd.leases file
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
private ArrayList ProcessDhcpdLeasesFile(string filename)
{
IOController.Log(this, "ProcessDhcpdLeasesFile filename: " + filename, Flag.debug);
if (!File.Exists(filename))
{
IOController.Log(this, filename + " does not exist", Flag.error);
return(null);
}
using (StreamReader sr = File.OpenText(filename))
{
string input;
ArrayList filecontent = new ArrayList();
while ((input = sr.ReadLine()) != null)
{
filecontent.Add(input);
}
return(filecontent);
}
}
/// <summary>
/// saves the configuration and copies it to the /etc/dhcp/dhcpd.conf file.
/// Afterwards the interface in the /etc/default/isc-dhcp-server is updated and the dhcpd service is restarted.
/// </summary>
public void ApplySettingsToDHCPServer()
{
if (OsIsUnix)
{
SaveSettingsFile(Environment.CurrentDirectory.ToString() + "/dhcpd.gm4d");
shellStartInfo.Arguments = string.Format("-c \"gksudo mv " + Environment.CurrentDirectory.ToString() + "/dhcpd.gm4d /etc/dhcp/dhcpd.conf\"");
shellProc.Start();
IOController.Log(this, "ApplySettingsToDHCPServer " + shellProc.StandardOutput.ReadToEnd(), Flag.debug);
shellProc.WaitForExit();
this.ApplySelectedInterface();
if (this.settings.IsDHCPServerRunning)
{
this.RestartDHCPServer();
}
}
else
{
throw new System.Exception("System is not a Unix environment");
}
}
// region for interface selection
#region interface selection
//################################################################### interface selection
/// <summary>
/// selects the inface with the given index
/// </summary>
/// <param name="i">index of the interface</param>
public void SelectInterface(int i)
{
if (i < Interfaces.Count)
{
IOController.Log(this, "SelectInterface called index:" + i, IOController.Flag.debug);
HostNIC nic = (HostNIC)Interfaces[i];
this.HostIP = nic.IPAddress;
this.HostSubnetMask = nic.SubnetMask;
this.HostSubnet = nic.SubnetIdentifier;
this.HostHasStaticIp = nic.StaticIPAddress;
this.HostGateway = nic.Gateway;
this.SelectedInterfaceIndex = i;
this.SelectedInterfaceID = nic.Id;
IOController.Log(this, "SelectInterface ID" + nic.Id, IOController.Flag.debug);
this.OverviewSelectedInterfaceName = nic.Name;
IOController.Log(this, nic.ToString(), IOController.Flag.status);
}
else
{
IOController.Log(this, "SelectInterface IndexOutOfRange index:" + i, IOController.Flag.error);
}
}
/// <summary>
/// takes a filename, reads in the text content of file and returns contents as ArrayList of lines
/// </summary>
/// <param name="filename"></param>
/// <returns>filecontent as string</returns>
private ArrayList ProcessConfigFile(string filename)
{
IOController.Log(this, "ProcessConfigFile entered", IOController.Flag.debug);
IOController.Log(this, "ProcessConfigFile filename: " + filename, Flag.status);
if (File.Exists(filename))
{
using (StreamReader sr = File.OpenText(filename))
{
string input;
ArrayList filecontent = new ArrayList();
while ((input = sr.ReadLine()) != null)
{
filecontent.Add(input);
}
return(filecontent);
}
}
else
{
throw new FileNotFoundException(filename + " not found.");
}
}
/// <summary>
/// reads the content of the dhcpd.leases file
/// </summary>
/// <param name="obj"></param>
public void ReadDhcpdLeasesFile(object obj)
{
IOController.Log(this, "ReadDhcpdLeasesFile start", Flag.debug);
string filename = obj.ToString();
if (OsIsUnix)
{
if (File.Exists(filename))
{
IOController.Log(this, "ReadDhcpdLeasesFile filename: " + filename, Flag.debug);
ReadDhcpdLeasesFileDelegate readDhcpdLeasesFileDelegate = new ReadDhcpdLeasesFileDelegate(ProcessDhcpdLeasesFile);
IAsyncResult readDhcpdLeasesFileResult = readDhcpdLeasesFileDelegate.BeginInvoke(filename, parseDhcpdLeasesFile, null);
}
else
{
throw new FileNotFoundException(filename + " not found");
}
}
else
{
throw new System.Exception("System is not a Unix environment");
}
}
/// <summary>
/// initialises the file watcher to track change sin the dhcpd.leases file
/// </summary>
public void InitiateDhcpdLeasesFileWatcher()
{
if (OsIsUnix)
{
if (!File.Exists("/var/lib/dhcp/dhcpd.leases"))
{
shellStartInfo.Arguments = string.Format("-c \"gksudo touch /var/lib/dhcp/dhcpd.leases\"");
IOController.Log(this, "initiateDhcpdLeasesFileWatcher create dhcpd.leases " + shellProc.StandardOutput.ReadToEnd(), Flag.debug);
shellProc.WaitForExit();
}
if (File.Exists("/var/lib/dhcp/dhcpd.leases"))
{
IOController.Log(this, "initiateDhcpdLeasesFileWatcher file /var/lib/dhcp/dhcpd.leases is present", Flag.debug);
// create a new FileSystemWatcher
this.DhcpdLeasesFileWatcher = new FileSystemWatcher();
string path = Path.Combine("/", "var", "lib", "dhcp");
// set path
this.DhcpdLeasesFileWatcher.Path = path;
// watch for changes in LastAccess and LastWrite times
this.DhcpdLeasesFileWatcher.NotifyFilter = NotifyFilters.LastWrite;
// only watch a specific file
this.DhcpdLeasesFileWatcher.Filter = "dhcpd.leases";
// add event handler
this.DhcpdLeasesFileWatcher.Changed += new FileSystemEventHandler(OnDhcpdLeasesChanged);
// start watching.
this.DhcpdLeasesFileWatcher.EnableRaisingEvents = true;
}
else
{
throw new FileNotFoundException("/var/lib/dhcp/dhcpd.leases not found");
}
}
else
{
throw new System.Exception("System is not a Unix environment");
}
}
/// <summary>
/// is called by the file watcher is the dhcpd.leases file changes
/// </summary>
/// <param name="source"></param>
/// <param name="e"></param>
private void OnDhcpdLeasesChanged(object source, FileSystemEventArgs e)
{
IOController.Log(this, "OnDhcpdLeasesChanged: " + e.FullPath.ToString(), Flag.debug);
this.ReadDhcpdLeasesFile(e.FullPath);
}
/// <summary>
/// retrieves information about the host computer such as network interfaces, IP addresses etc. and stores the information in settings
/// </summary>
public void GetHostInfo()
{
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
NetCalcTool nct = settings.HostNetCalcTool;
// loop through all network interfaces
foreach (NetworkInterface adapter in nics)
{
//check if interface is loopback
if (adapter.NetworkInterfaceType == NetworkInterfaceType.Loopback)
{
//skip if loopback
continue;
}
//check if adapter is up
if (adapter.OperationalStatus != OperationalStatus.Up)
{
//if not up skip this interface
continue;
}
//create new HostNIC
HostNIC nic = new HostNIC();
//get name, id, hardware address, interface type
nic.Name = adapter.Name;
nic.Id = adapter.Id;
nic.MacAddress = adapter.GetPhysicalAddress().ToString();
nic.Type = adapter.NetworkInterfaceType.ToString();
//get ipv4 status
nic.Ipv4Enabled = adapter.Supports(NetworkInterfaceComponent.IPv4);
if (adapter.Supports(NetworkInterfaceComponent.IPv4))
{
nic.StaticIPAddress = !adapter.GetIPProperties().GetIPv4Properties().IsDhcpEnabled;
// get gateway addresses and set first if present
GatewayIPAddressInformationCollection gateways = adapter.GetIPProperties().GatewayAddresses;
if (gateways.Count > 0)
{
nic.Gateway = gateways[0].Address.ToString();
}
// get unicast addresses
foreach (UnicastIPAddressInformation unicastIPAddressInformation in adapter.GetIPProperties().UnicastAddresses)
{
// check if ipv4 address
if (unicastIPAddressInformation.Address.AddressFamily == AddressFamily.InterNetwork)
{
// set ip adress
nic.IPAddress = unicastIPAddressInformation.Address.ToString();
// get subnet mask
String snetMask;
try
{
// IPv4Mask not implemented in mono at current state
snetMask = unicastIPAddressInformation.IPv4Mask.ToString();
}
catch (NotImplementedException e)
{
IOController.Log(this, "failed to get subnetmask with unicastIPAddressInformation.IPv4Mask, using workaround", Flag.status);
// workaround to get subnetmask in unix environment with mono using the custom SubnetMask class
snetMask = "";
snetMask = SubnetMask.GetIPv4Mask(adapter.Name);
}
nic.SubnetMask = snetMask;
}
}
//try to get the dns addresses of adapter
try
{
IPAddressCollection dnsAddresses = adapter.GetIPProperties().DnsAddresses;
if (dnsAddresses.Count >= 1)
{
nic.PrimaryDNS = dnsAddresses[0].ToString();
}
if (dnsAddresses.Count >= 2)
{
nic.SecondaryDNS = dnsAddresses[0].ToString();
}
}
catch (Exception e)
{
IOController.Log(this, "failed to get DNS server addresses " + e, Flag.error);
}
//calculate network id
try
{
nct.calculate(nic.IPAddress, nic.SubnetMask);
nic.SubnetIdentifier = nct.NetworkId;
}
catch (Exception e)
{
IOController.Log(this, "failed calculate network address " + e, Flag.error);
}
}
//add NIC to settings
settings.AddInterface(nic);
}
}
/// <summary>
/// takes the filecontent from IAsyncResult und parses DHCP settings to the settings object
/// </summary>
/// <param name="result">takes an IAsyncResult containing the file content as string</param>
public void parseConfig(IAsyncResult result)
{
AsyncResult aResult = (AsyncResult)result;
ReadConfigFileDelegate readConfigFileDelegate = (ReadConfigFileDelegate)aResult.AsyncDelegate;
ArrayList filecontent = readConfigFileDelegate.EndInvoke(result);
IOController.Log(this, "parseConfig filecontent: " + String.Join(",", filecontent), Flag.debug);
StaticLease staticLease = null;
this.settings.StaticLeases.Clear();
foreach (string line in filecontent)
{
// clean line from tabs, break, whitespaces etc.
string cleanline = Regex.Replace(line, @"\s+", " ");
cleanline = cleanline.Trim();
// check for valid tags
if (cleanline.StartsWith("default-lease-time"))
{
int endindex = cleanline.IndexOf(";");
int startindex = 19;
int tmp;
if (int.TryParse(cleanline.Substring(startindex, endindex - startindex), out tmp))
{
this.settings.DefaultLeaseTime = tmp;
}
}
else if (cleanline.StartsWith("max-lease-time"))
{
int endindex = cleanline.IndexOf(";");
int startindex = 15;
int tmp;
if (int.TryParse(cleanline.Substring(startindex, endindex - startindex), out tmp))
{
this.settings.MaxLeaseTime = tmp;
}
}
else if (cleanline.StartsWith("subnet"))
{
string[] strArr = cleanline.Split(' ');
System.Net.IPAddress tmp;
if (strArr.Length > 1)
{
if (System.Net.IPAddress.TryParse(strArr[1], out tmp))
{
this.settings.Subnet = tmp.ToString();
}
if (strArr.Length > 3)
{
if (strArr[2].Contains("netmask"))
{
if (System.Net.IPAddress.TryParse(strArr[3], out tmp))
{
this.settings.SubnetMask = tmp.ToString();
}
}
}
}
}
else if (cleanline.StartsWith("range"))
{
string[] strArr = cleanline.Split(' ');
System.Net.IPAddress tmp;
if (strArr.Length > 1)
{
if (System.Net.IPAddress.TryParse(strArr[1], out tmp))
{
this.settings.IpRangeStart = tmp.ToString();
}
}
if (strArr.Length > 2)
{
strArr[2] = strArr[2].TrimEnd(';');
if (System.Net.IPAddress.TryParse(strArr[2], out tmp))
{
this.settings.IpRangeEnd = tmp.ToString();
}
}
}
else if (cleanline.StartsWith("option"))
{
string[] strArr = cleanline.Split(' ');
System.Net.IPAddress tmpIp;
if (strArr.Length > 2)
{
switch (strArr[1])
{
case "routers":
strArr[2] = strArr[2].TrimEnd(';');
if (System.Net.IPAddress.TryParse(strArr[2], out tmpIp))
{
this.settings.Gateway = tmpIp.ToString();
}
break;
case "domain-name-servers":
strArr[2] = strArr[2].TrimEnd(';');
strArr[2] = strArr[2].TrimEnd(',');
if (System.Net.IPAddress.TryParse(strArr[2], out tmpIp))
{
this.settings.PrimaryDNS = tmpIp.ToString();
}
if (strArr.Length > 3)
{
strArr[3] = strArr[3].TrimEnd(';');
if (System.Net.IPAddress.TryParse(strArr[3], out tmpIp))
{
this.settings.SecondaryDNS = tmpIp.ToString();
}
}
break;
default: break;
}
}
}
else if (cleanline.StartsWith("host"))
{
staticLease = new StaticLease();
string[] strArr = cleanline.Split(' ');
if (strArr.Length > 1)
{
staticLease.DeviceName = strArr[1];
}
}
else if (cleanline.StartsWith("hardware ethernet"))
{
int endindex = cleanline.IndexOf(";");
int startindex = 18;
staticLease.MACAddress = cleanline.Substring(startindex, endindex - startindex);
}
else if (cleanline.StartsWith("fixed-address"))
{
int endindex = cleanline.IndexOf(";");
int startindex = 14;
staticLease.IPAddress = cleanline.Substring(startindex, endindex - startindex);
}
if (staticLease != null && cleanline.Contains("}"))
{
staticLease.ID = (this.settings.GetStaticLeases().Count + 1).ToString();
this.settings.AddStaticLease(staticLease);
staticLease = null;
}
}
if (SettingsFileLoadedEvt != null)
{
SettingsFileLoadedEvt(this, new EventArgs());
}
}
/// <summary>
/// is called when settings file save is complete
/// </summary>
/// <param name="result"></param>
public void SaveSettingsToFileComplete(IAsyncResult result)
{
IOController.Log(this, "File saved", Flag.status);
}
/// <summary>
/// Run all neccassary functions to gather information at the start of the application and reports progress.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void init(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
worker.ReportProgress(1);
try
{
// initialize a bash instance in the IOController
this.ioController.InitShell();
}
catch (Exception exc)
{
IOController.Log(this, "InitShell " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(20);
try
{
if (!ioController.GetGksudoInstallStatus())
{
// check if gksu is installed
IOController.Log(this, "gksu not installed ", IOController.Flag.error);
}
}
catch (Exception exc)
{
IOController.Log(this, "GetGksudoInstallStatus " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(30);
try
{
// get information about the host computer
this.ioController.GetHostInfo();
}
catch (Exception exc)
{
IOController.Log(this, "GetHostInfo " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(40);
try
{
// get status of isc-dhcp-server installation
this.ioController.GetDHCPServerInstallStatus();
}
catch (Exception exc)
{
IOController.Log(this, "GetDHCPServerInstallStatus " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(50);
try
{
// get running status of isc-dhcp-server
this.ioController.GetDHCPServerStatus();
}
catch (Exception exc)
{
IOController.Log(this, "GetDHCPServerStatus " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(60);
try
{
// get the inface selected in the /etc/default/isc-dhcp-server file
this.ioController.GetSelectedInterfaceFromEtcDefault();
}
catch (Exception exc)
{
IOController.Log(this, "GetSelectedInterfaceFromEtcDeafult " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(70);
try
{
if (settings.IsDHCPServerRunning)
{
// load the setting from the /etc/dhcp/dhcpd/conf file if dhcp server is running
this.ioController.LoadSettingsFile("/etc/dhcp/dhcpd.conf");
}
}
catch (Exception exc)
{
IOController.Log(this, "LoadSettingsFile " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(80);
try
{
// create the filewatcher to track changes in the /var/lib/dhcp/dhcpd. leases file
this.ioController.InitiateDhcpdLeasesFileWatcher();
}
catch (Exception exc)
{
IOController.Log(this, "InitiateDhcpdLeasesFileWatcher " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(90);
try
{
if (settings.IsDHCPServerRunning)
{
// read in existing leases if dhcp server is running
this.ioController.ReadDhcpdLeasesFile("/var/lib/dhcp/dhcpd.leases");
}
}
catch (Exception exc)
{
IOController.Log(this, "ReadDhcpdLeasesFile " + exc.Message, IOController.Flag.error);
}
worker.ReportProgress(100);
System.Threading.Thread.Sleep(800);
}
/// <summary>
/// parses the leases from the filecontent of the dhcpd.leasses file
/// </summary>
/// <param name="result"></param>
private void parseDhcpdLeasesFile(IAsyncResult result)
{
IOController.Log(this, "parseDhcpdLeasesFile start", Flag.debug);
System.Collections.Generic.Dictionary <String, DhcpdLease> dhcpdLeasesList = new System.Collections.Generic.Dictionary <String, DhcpdLease>();
DhcpdLease dhcpdLease = new DhcpdLease();
try
{
AsyncResult aResult = (AsyncResult)result;
ReadDhcpdLeasesFileDelegate readDhcpdLeasesFileDelegate = (ReadDhcpdLeasesFileDelegate)aResult.AsyncDelegate;
ArrayList filecontent = readDhcpdLeasesFileDelegate.EndInvoke(result);
this.settings.DhcpdLeases.Clear();
//IOController.Log(this, "parseDhcpdLeasesFile finished EndInvoke", Flag.debug);
foreach (string line in filecontent)
{
string cleanline = Regex.Replace(line, @"\s+", " ");
cleanline = cleanline.Trim();
if (cleanline.StartsWith("lease"))
{
dhcpdLease = new DhcpdLease();
int endindex = cleanline.IndexOf("{") - 1;
int startindex = 6;
dhcpdLease.IPAddress = cleanline.Substring(startindex, endindex - startindex);
}
else if (cleanline.StartsWith("hardware ethernet"))
{
int endindex = cleanline.IndexOf(";");
int startindex = cleanline.IndexOf("hardware ethernet") + 18;
dhcpdLease.MACAddress = cleanline.Substring(startindex, endindex - startindex);
}
else if (cleanline.StartsWith("client-hostname"))
{
int endindex = cleanline.IndexOf(";") - 1;
int startindex = cleanline.IndexOf("client-hostname") + 17;
dhcpdLease.DeviceName = cleanline.Substring(startindex, endindex - startindex);
}
else if (cleanline.StartsWith("starts"))
{
string[] strArr = cleanline.Split(' ');
if (strArr.Length > 3)
{
strArr[3] = strArr[3].TrimEnd(';');
dhcpdLease.LeaseStart = strArr[2] + " " + strArr[3];
}
}
else if (cleanline.StartsWith("ends"))
{
string[] strArr = cleanline.Split(' ');
if (strArr.Length > 3)
{
strArr[3] = strArr[3].TrimEnd(';');
dhcpdLease.LeaseEnd = strArr[2] + " " + strArr[3];
}
}
else if (cleanline.StartsWith("binding state"))
{
string[] strArr = cleanline.Split(' ');
if (strArr.Length > 2)
{
strArr[2] = strArr[2].TrimEnd(';');
dhcpdLease.LeaseState = strArr[2];
}
}
else if (cleanline.Contains("}"))
{
dhcpdLeasesList[dhcpdLease.MACAddress] = dhcpdLease;
//IOController.Log(this, "found dhcpdLease: " + dhcpdLease.ToString(), Flag.debug);
}
}
}
catch (Exception e)
{
IOController.Log(this, "parsing failed " + e.ToString());
}
this.settings.DhcpdLeases = dhcpdLeasesList;
IOController.Log(this, "Active Leases found:\n" + string.Join("\n", dhcpdLeasesList.Select(x => x.Key + "=" + x.Value).ToArray()), Flag.status);
}