/// <summary>
/// Queries the DNS Cache for the Gamespy hosts, and verifies that the
/// IP addresses in the DNS Cache match that of the desired redirect IP
/// </summary>
public static bool VerifyDNSCache(IProgress <DnsCacheResult> Progress = null)
{
// Nothing to do here if redirects are disabled
if (!RedirectsEnabled)
{
return(false);
}
// Grab our saved hosts file IP addresses
if (RedirectMethod != RedirectMode.DnsServer)
{
// Grab hosts file base
HostsFile hFile = (RedirectMethod == RedirectMode.HostsFile)
? HostsFileSys as HostsFile
: HostsFileIcs as HostsFile;
// Fetch our saved IPAddresses
GamespyServerAddress = (hFile.HasEntry("master.gamespy.com")) ? hFile.Get("master.gamespy.com") : null;
StatsServerAddress = (hFile.HasEntry(Bf2StatsHost)) ? hFile.Get(Bf2StatsHost) : null;
}
// Flush our cache report
DnsCacheReport.Entries.Clear();
// Verify Gamespy Server IP addresses
if (GamespyServerAddress != null)
{
foreach (string address in GamespyHosts)
{
// Create new report
DnsCacheResult Result = new DnsCacheResult(address, GamespyServerAddress);
// Add the result to the report
DnsCacheReport.AddOrUpdate(Result);
// Report progress if we have a progress object
if (Progress != null)
{
Progress.Report(Result);
}
}
}
// Verify Stats Server address
if (StatsServerAddress != null)
{
// Create new report
DnsCacheResult Result = new DnsCacheResult(Bf2StatsHost, StatsServerAddress);
// Add the result to the report
DnsCacheReport.AddOrUpdate(Result);
// Report progress if we have a progress object
if (Progress != null)
{
Progress.Report(Result);
}
}
// Set internal
DnsCacheReport.LastRefresh = DateTime.Now;
return(DnsCacheReport.ErrorFree);
}
/// <summary>
/// The main entry point for the redirector
/// </summary>
/// <returns>Returns wether the DNS cache results match the selected IPAddresses</returns>
public static Task <bool> Initialize()
{
return(Task.Run <bool>(() =>
{
// Only initialize once
if (!IsInitialized)
{
IsInitialized = true;
// Set the System.Net DNS Cache refresh timeout to 1 millisecond
ServicePointManager.DnsRefreshTimeout = 1;
// Get config options
RedirectMethod = Program.Config.RedirectMode;
// Create new Instances
HostsFileSys = new SysHostsFile();
HostsFileIcs = new HostsFileIcs();
// Detect redirects
bool IcsHasRedirects = HostsFileIcs.HasAnyEntry(GamespyHosts) || HostsFileIcs.HasEntry(Bf2StatsHost);
bool HostsHasRedirects = HostsFileSys.HasAnyEntry(GamespyHosts) || HostsFileSys.HasEntry(Bf2StatsHost);
// Both files cannot have redirects!
if (IcsHasRedirects && HostsHasRedirects)
{
try
{
// Remove all redirects
RemoveRedirects(HostsFileIcs);
RemoveRedirects(HostsFileSys);
}
catch { }
}
else if (IcsHasRedirects || HostsHasRedirects)
{
// Do the settings match?
bool match = (RedirectMethod == RedirectMode.HostsFile && HostsHasRedirects) ||
(RedirectMethod == RedirectMode.HostsIcsFile && IcsHasRedirects);
// Perform switch if the settings don't match
if (!match)
{
RedirectMethod = (RedirectMethod == RedirectMode.HostsFile) ? RedirectMode.HostsIcsFile : RedirectMode.HostsFile;
}
// === Fetch our redirect data
// Grab hosts file base
HostsFile hFile = (RedirectMethod == RedirectMode.HostsFile)
? HostsFileSys as HostsFile
: HostsFileIcs as HostsFile;
// Parse Stats Address
if (hFile.HasEntry("bf2web.gamespy.com"))
{
StatsServerAddress = hFile.Get("bf2web.gamespy.com");
}
// Parse Gamespy Address
if (hFile.HasEntry("master.gamespy.com"))
{
GamespyServerAddress = hFile.Get("master.gamespy.com");
}
// Lock hosts file
if (RedirectMethod == RedirectMode.HostsFile && Program.Config.LockHostsFile)
{
HostsFileSys.Lock();
}
}
else if (RedirectMethod == RedirectMode.DnsServer)
{
IPAddress addy;
// Parse last used Stats Server Address
if (Networking.TryGetIpAddress(Program.Config.LastStatsServerAddress, out addy))
{
StatsServerAddress = addy;
}
// Parse gamespy saved address
if (Networking.TryGetIpAddress(Program.Config.LastLoginServerAddress, out addy))
{
GamespyServerAddress = addy;
}
}
}
// Verify cache
return (RedirectsEnabled) ? VerifyDNSCache() : true;
}));
}