private void DoSynchronize()
{
var myDomains = new Dictionary <string, HostEntry>();
HostsDatabase.Lock();
foreach (var host in HostsDatabase.LocalHosts) // local comes first because we can overwrite a remote domain
{
myDomains.Add(
host.Name.ToLower(),
host);
}
foreach (var host in HostsDatabase.Hosts) // remote hosts
{
var name = host.Name.ToLower();
if (!myDomains.ContainsKey(name))
{
myDomains.Add(name, host);
}
}
HostsDatabase.Unlock();
// load the windows hosts file
var windowsDomains = new Dictionary <string, HostEntry>();
var lines = File.ReadAllLines(WindowsHostsFilepath);
for (int i = 0; i < lines.Length; ++i)
{
int posComment = lines[i].IndexOf('#');
if (posComment != -1)
{
lines[i] = lines[i].Substring(0, posComment);
}
lines[i] = lines[i].Trim();
if (lines[i].Length > 0)
{
var data = lines[i].Split(new char[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
if (data.Length >= 2 &&
Regex.IsMatch(data[0], GlobalRules.IPRegex, RegexOptions.IgnoreCase))
{
for (int j = 1; j < data.Length; ++j)
{
if (Regex.IsMatch(data[j], GlobalRules.DomainRegex, RegexOptions.IgnoreCase))
{
if (!windowsDomains.ContainsKey(data[j].ToLower()))
{
windowsDomains.Add(data[j].ToLower(), new HostEntry(data[j].ToLower(), data[0], string.Empty, false));
}
else
{
Logger.Log(LogType.Warning, "Multiple entries of domain in: {0}", lines[i]);
}
}
}
}
else
{
Logger.Log(LogType.Debug, "Ignored line: {0}", lines[i]);
}
}
}
// compare ...
var needRebuild = false;
foreach (var key in myDomains.Keys) // check if all "myDomains" exist in the hosts file
{
if (!windowsDomains.ContainsKey(key) ||
windowsDomains[key].IP != myDomains[key].IP ||
windowsDomains[key].Description != myDomains[key].Description)
{
needRebuild = true;
break;
}
}
if (!needRebuild)
{
// check if windows domains file have any domains that shouldnt be there ...
foreach (var key in windowsDomains.Keys)
{
if (!myDomains.ContainsKey(key))
{
needRebuild = true;
break;
}
}
}
if (needRebuild)
{
var sb = new StringBuilder(32768);
sb.AppendLine("# Copyright (c) 1993-2009 Microsoft Corp.");
sb.AppendLine("#");
sb.AppendLine("# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.");
sb.AppendLine("#");
sb.AppendLine("# This file contains the mappings of IP addresses to host names. Each");
sb.AppendLine("# entry should be kept on an individual line. The IP address should");
sb.AppendLine("# be placed in the first column followed by the corresponding host name.");
sb.AppendLine("# The IP address and the host name should be separated by at least one");
sb.AppendLine("# space.");
sb.AppendLine("#");
sb.AppendLine("# Additionally, comments (such as these) may be inserted on individual");
sb.AppendLine("# lines or following the machine name denoted by a '#' symbol.");
sb.AppendLine("#");
sb.AppendLine("# For example:");
sb.AppendLine("#");
sb.AppendLine("# 102.54.94.97 rhino.acme.com # source server");
sb.AppendLine("# 38.25.63.10 x.acme.com # x client host");
sb.AppendLine();
sb.AppendLine("# localhost name resolution is handled within DNS itself.");
sb.AppendLine("# 127.0.0.1 localhost");
sb.AppendLine("# ::1 localhost");
sb.AppendLine();
int n = 0;
foreach (var kv in myDomains)
{
if (n++ > 0)
{
sb.AppendLine();
}
if (!string.IsNullOrEmpty(kv.Value.Description))
{
sb.AppendFormat("{0} {1} # {2}", kv.Value.IP.PadRight(15, ' '), kv.Value.Name, kv.Value.Description);
}
else
{
sb.AppendFormat("{0} {1}", kv.Value.IP.PadRight(15, ' '), kv.Value.Name);
}
}
for (int i = 0; i < 10; ++i)
{
try
{
File.WriteAllText(WindowsHostsFilepath, sb.ToString());
break;
}
catch (IOException ex)
{
if (i + 1 >= 10)
{
MessageBox.Show(
"Fatal error: The hosts file appears to be locked after 10 attempts to write to it.\nMessage: " + ex.Message,
"Host Synchronize",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
else
{
Thread.Sleep(500);
}
}
}
}
}
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
var serverMode = false;
var startInTray = false;
var args = Environment.GetCommandLineArgs();
for (int i = 0; i < args.Length; ++i)
{
if (string.Compare(args[i], "-server", true) == 0)
{
serverMode = true;
}
else if (string.Compare(args[i], "-dumpver", true) == 0)
{
// write version.txt
File.WriteAllText("version.txt", string.Format(
"{0}|{1}",
Version,
File.GetLastWriteTimeUtc(Application.ExecutablePath).Ticks));
return;
}
else if (string.Compare(args[i], "-autostart", true) == 0)
{
Environment.CurrentDirectory = Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
startInTray = true;
}
else if (string.Compare(args[i], "-tray", true) == 0)
{
startInTray = true;
}
}
using (var instance = new SingleInstanceChecker())
{
var registerInstanceResult = instance.RegisterInstance(serverMode ? ServerInstanceGuid : ClientInstanceGuid);
if (registerInstanceResult == RegisterInstanceResult.InstanceAlreadyExist)
{
MessageBox.Show(
"Another instance is already running on this computer.",
"WHD",
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
return;
}
if (registerInstanceResult != RegisterInstanceResult.Succeeded)
{
MessageBox.Show(string.Format("An error occurred attempting to register single-instance.\nCode: {0}",
Enum.GetName(typeof(RegisterInstanceResult), registerInstanceResult)),
"WHD",
MessageBoxButtons.OK,
MessageBoxIcon.Warning);
return;
}
if (!HostsDatabase.Load())
{
HostsDatabase.Save(); // create file...
}
if (serverMode)
{
if (!ServerConfiguration.Load("server.xml"))
{
MessageBox.Show("Failed to load server.xml", "WHD", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
Application.Run(new ServerForm());
}
else
{
try
{
File.Open(HostsFileSynchronizer.WindowsHostsFilepath, FileMode.Open, FileAccess.ReadWrite)
.Dispose(); // close it right away
}
catch (Exception ex)
{
MessageBox.Show(
"Failed to open hosts file with read/write access.\n" + ex.Message +
"\n\nYou must run this program as administrator or change the permissions of the hosts file.",
"WHD",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
if (Configuration.IsFirstRun)
{
using (var dlg = new ClientConfigurationDlg())
{
if (dlg.ShowDialog() != DialogResult.OK)
{
return;
}
Configuration.Address = dlg.Address;
Configuration.Port = dlg.Port;
Configuration.Key = dlg.Key;
Configuration.IsFirstRun = false;
}
}
using (var hfs = new HostsFileSynchronizer())
using (var form = new ClientForm(hfs, startInTray))
{
Application.Run(form);
}
}
}
}
