/// <summary>
/// Checks the HOSTS file on startup, detecting existing redirects to the bf2web.gamespy
/// or gpcm/gpsp.gamespy urls
/// </summary>
private void DoHOSTSCheck()
{
// Make sure we can read and write
if (!HostsFile.CanRead)
{
UpdateStatus("- Cannot open HOSTS file for reading!");
}
else if (!HostsFile.CanWrite)
{
UpdateStatus("- Cannot open HOSTS file for writing!");
}
else
{
bool MatchFound = false;
// Login server redirect
if (HostsFile.HasEntry("gpcm.gamespy.com"))
{
MatchFound = true;
GpcmCheckbox.Checked = true;
GpcmAddress.Text = HostsFile.Get("gpcm.gamespy.com");
}
// Stat server redirect
if (HostsFile.HasEntry("bf2web.gamespy.com"))
{
MatchFound = true;
Bf2webCheckbox.Checked = true;
Bf2webAddress.Text = HostsFile.Get("bf2web.gamespy.com");
}
// Did we find any matches?
if (MatchFound)
{
UpdateStatus("- Found old redirect data in HOSTS file.");
RedirectsEnabled = true;
LockGroups();
RedirectButton.Enabled = true;
RedirectButton.Text = "Remove HOSTS Redirect";
UpdateStatus("- Locking HOSTS file");
HostsFile.Lock();
UpdateStatus("- All Done!");
}
}
}
/// <summary>
/// Removes HOSTS file redirects.
/// </summary>
private void UndoRedirects()
{
// Tell the writter to restore the HOSTS file to its
// original state
UpdateStatus("- Unlocking HOSTS file");
HostsFile.UnLock();
// Restore the original hosts file contents
UdpateStatus("- Restoring HOSTS file... ", false);
try
{
HostsFile.Remove("bf2web.gamespy.com");
HostsFile.Remove("gpcm.gamespy.com");
HostsFile.Remove("gpsp.gamespy.com");
HostsFile.Remove("motd.gamespy.com");
HostsFile.Remove("master.gamespy.com");
HostsFile.Remove("battlefield2.ms14.gamespy.com");
HostsFile.Remove("battlefield2.available.gamespy.com");
HostsFile.Save();
UpdateStatus("Success!");
}
catch
{
UpdateStatus("Failed!");
MessageBox.Show(
"Unable to RESTORE to HOSTS file! Unfortunatly this error can only be fixed by manually removing the HOSTS file,"
+ " and replacing it with a new one :( . If possible, you may also try changing the permissions yourself.",
"Error", MessageBoxButtons.OK, MessageBoxIcon.Error
);
}
// Flush the DNS!
FlushDNS();
// Update status
UpdateStatus("- All Done!");
// Reset form data
RedirectsEnabled = false;
RedirectButton.Text = "Begin HOSTS Redirect";
UnlockGroups();
}
/// <summary>
/// Preforms the pings required to fill the dns cache, and locks the HOSTS file.
/// The reason we ping, is because once the HOSTS file is locked, any request
/// made to a url (when the DNS cache is empty), will skip the hosts file, because
/// it cant be read. If we ping first, then the DNS cache fills up with the IP
/// addresses in the hosts file.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RebuildDNSCache(object sender, DoWorkEventArgs e)
{
// Update status window
UdpateStatus("- Rebuilding DNS Cache... ", false);
foreach (KeyValuePair <String, String> IP in HostsFile.GetLines())
{
// Cancel if we have a cancelation request
if (HostsWorker.CancellationPending)
{
UpdateStatus("Cancelled!");
e.Cancel = true;
return;
}
Ping p = new Ping();
PingReply reply = p.Send(IP.Key);
}
UpdateStatus("Done");
// Lock the hosts file
UpdateStatus("- Locking HOSTS file");
HostsFile.Lock();
UpdateStatus("- All Done!");
}
/// <summary>
/// Event fired when the UI is closing, Unlocks the HostsFile
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Launcher_FormClosing(object sender, FormClosingEventArgs e)
{
HostsFile.UnLock();
}
/// <summary>
/// This is the main HOSTS file button event handler.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RedirectButton_Click(object sender, EventArgs e)
{
// Clear the output window
LogBox.Clear();
// Show exception message on button push if we cant read or write
if (!HostsFile.CanRead)
{
string message = "Unable to READ the HOST file! Please make sure this program is being ran as an administrator, or "
+ "modify your HOSTS file permissions, allowing this program to read/modify it.";
MessageBox.Show(message, "Hosts file Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
else if (!HostsFile.CanWrite)
{
string message = "HOSTS file is not WRITABLE! Please make sure this program is being ran as an administrator, or "
+ "modify your HOSTS file permissions, allowing this program to read/modify it.";
MessageBox.Show(message, "Hosts file Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
// If we do not have a redirect in the hosts file...
else if (!RedirectsEnabled)
{
// Make sure we are going to redirect something...
if (!Bf2webCheckbox.Checked && !GpcmCheckbox.Checked)
{
MessageBox.Show(
"Please select at least 1 redirect option",
"Select an Option", MessageBoxButtons.OK, MessageBoxIcon.Information
);
return;
}
// Lock button and groupboxes
LockGroups();
// First, lets determine what the user wants to redirect
if (Bf2webCheckbox.Checked)
{
// Make sure we have a valid IP address in the address box!
string text = Bf2webAddress.Text.Trim();
if (text.Length < 8)
{
MessageBox.Show(
"You must enter an IP address or Hostname in the Address box!",
"Invalid Address", MessageBoxButtons.OK, MessageBoxIcon.Warning
);
UnlockGroups();
Bf2webAddress.Focus();
return;
}
// Convert Localhost to the Loopback Address
if (text.ToLower().Trim() == "localhost")
{
text = IPAddress.Loopback.ToString();
}
// Check if this is an IP address or hostname
IPAddress BF2Web;
try
{
UpdateStatus("- Resolving Hostname: " + text);
BF2Web = GetIpAddress(text);
UpdateStatus("- Found IP: " + BF2Web);
}
catch
{
MessageBox.Show(
"Stats server redirect address is invalid, or doesnt exist. Please enter a valid, and existing IPv4/6 or Hostname.",
"Invalid Address", MessageBoxButtons.OK, MessageBoxIcon.Warning
);
UpdateStatus("- Failed to Resolve Hostname!");
UnlockGroups();
return;
}
// Append line, and update status
HostsFile.Set("bf2web.gamespy.com", BF2Web.ToString());
Config.LastStatsServerAddress = Bf2webAddress.Text.Trim();
UpdateStatus("- Adding bf2web.gamespy.com redirect to hosts file");
}
// First, lets determine what the user wants to redirect
if (GpcmCheckbox.Checked)
{
// Make sure we have a valid IP address in the address box!
string text2 = GpcmAddress.Text.Trim();
if (text2.Length < 8)
{
MessageBox.Show(
"You must enter an IP address or Hostname in the Address box!",
"Invalid Address", MessageBoxButtons.OK, MessageBoxIcon.Warning
);
UnlockGroups();
GpcmAddress.Focus();
return;
}
// Convert Localhost to the Loopback Address
if (text2.ToLower().Trim() == "localhost")
{
text2 = IPAddress.Loopback.ToString();
}
// Make sure the IP address is valid!
IPAddress GpcmA;
try
{
UpdateStatus("- Resolving Hostname: " + text2);
GpcmA = GetIpAddress(text2);
UpdateStatus("- Found IP: " + GpcmA);
}
catch
{
MessageBox.Show(
"Login Server redirect address is invalid, or doesnt exist. Please enter a valid, and existing IPv4/6 or Hostname.",
"Invalid Address", MessageBoxButtons.OK, MessageBoxIcon.Warning
);
UpdateStatus("- Failed to Resolve Hostname!");
UnlockGroups();
return;
}
// Update status
UpdateStatus("- Adding gpcm.gamespy.com redirect to hosts file");
UpdateStatus("- Adding gpsp.gamespy.com redirect to hosts file");
// Append lines to hosts file
HostsFile.Set("gpcm.gamespy.com", GpcmA.ToString());
HostsFile.Set("gpsp.gamespy.com", GpcmA.ToString());
Config.LastLoginServerAddress = GpcmAddress.Text.Trim();
}
// Save last used addresses
Config.Save();
// Create new instance of the background worker
HostsWorker = new BackgroundWorker();
HostsWorker.WorkerSupportsCancellation = true;
// Write the lines to the hosts file
UdpateStatus("- Writting to hosts file... ", false);
try
{
// Save lines to hosts file
HostsFile.Set("motd.gamespy.com", IPAddress.Loopback.ToString());
HostsFile.Set("master.gamespy.com", IPAddress.Loopback.ToString());
HostsFile.Set("battlefield2.ms14.gamespy.com", IPAddress.Loopback.ToString());
HostsFile.Set("battlefield2.available.gamespy.com", IPAddress.Loopback.ToString());
HostsFile.Save();
UpdateStatus("Success!");
// Flush DNS Cache
FlushDNS();
// Do pings, And lock hosts file. We do this in
// a background worker so the User can imediatly start
// the BF2 client while the HOSTS redirect finishes
HostsWorker.DoWork += new DoWorkEventHandler(RebuildDNSCache);
HostsWorker.RunWorkerAsync();
// Set form data
RedirectsEnabled = true;
RedirectButton.Text = "Remove HOSTS Redirect";
RedirectButton.Enabled = true;
}
catch
{
UpdateStatus("Failed!");
UnlockGroups();
MessageBox.Show(
"Unable to WRITE to HOSTS file! Please make sure to replace your HOSTS file with " +
"the one provided in the release package, or remove your current permissions from the HOSTS file. " +
"It may also help to run this program as an administrator.",
"Error", MessageBoxButtons.OK, MessageBoxIcon.Warning
);
}
}
else
{
// Lock the button
RedirectButton.Enabled = false;
// Create new instance of the background worker
if (HostsWorker == null)
{
HostsWorker = new BackgroundWorker();
HostsWorker.WorkerSupportsCancellation = true;
}
// Stop worker if its busy
if (HostsWorker.IsBusy)
{
LoadingForm.ShowScreen(this);
this.Enabled = false;
HostsWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(HostsWorker_RunWorkerCompleted);
HostsWorker.CancelAsync();
return;
}
UndoRedirects();
}
}
