/// <summary>
/// Starts receiving socket addresses of servers.
/// </summary>
/// <param name="region">The region of the world that you wish to find servers in.</param>
/// <param name="callback">Called when a batch of Socket addresses are received.</param>
/// <param name="filter">Used to set filter on the type of server required.</param>
/// <param name="batchCount">Number of batches to fetch.-1 would return all addressess.(1 batch = 1 udppacket = 231 addressess).</param>
/// <param name="errorCallback">Invoked in case of error.</param>
public void GetAddresses(Region region, BatchReceivedCallback callback, IpFilter filter = null, int batchCount = 1, ErrorCallback errorCallback = null)
{
ThrowIfDisposed();
StopReceiving();
this.region = region;
Callback = callback;
ErrorCallback = errorCallback;
BatchCount = batchCount == -1 ? int.MaxValue : batchCount;
this.filter = filter;
lastEndPoint = null;
Initialize();
TaskList.First().Start();
}
internal static byte[] BuildPacket(string endPoint, Region region, IpFilter filter)
{
List <byte> msg = new List <byte>();
msg.Add(Header);
msg.Add((byte)region);
msg.AddRange(Util.StringToBytes(endPoint));
msg.Add(0x00);
if (filter != null)
{
msg.AddRange(Util.StringToBytes(ProcessFilter(filter)));
}
msg.Add(0x00);
return(msg.ToArray());
}
internal static string ProcessFilter(IpFilter filter, bool isSubFilter = false)
{
StringBuilder filterStr = new StringBuilder();
if (filter.IsDedicated)
{
filterStr.Append(@"\type\d");
}
if (filter.IsSecure)
{
filterStr.Append(@"\secure\1");
}
if (!string.IsNullOrEmpty(filter.GameDirectory))
{
filterStr.Append(@"\gamedir\" + filter.GameDirectory);
}
if (!string.IsNullOrEmpty(filter.Map))
{
filterStr.Append(@"\map\" + filter.Map);
}
if (filter.IsLinux)
{
filterStr.Append(@"\linux\1");
}
if (filter.IsNotEmpty)
{
filterStr.Append(@"\empty\1");
}
if (filter.IsNotFull)
{
filterStr.Append(@"\full\1");
}
if (filter.IsProxy)
{
filterStr.Append(@"\proxy\1");
}
if (filter.NAppId != 0)
{
filterStr.Append(@"\napp\" + (ulong)filter.NAppId);
}
if (filter.IsNoPlayers)
{
filterStr.Append(@"\noplayers\1");
}
if (filter.IsWhiteListed)
{
filterStr.Append(@"\white\1");
}
if (!string.IsNullOrEmpty(filter.Tags))
{
filterStr.Append(@"\gametype\" + filter.Tags);
}
if (!string.IsNullOrEmpty(filter.HiddenTagsAll))
{
filterStr.Append(@"\gamedata\" + filter.HiddenTagsAll);
}
if (!string.IsNullOrEmpty(filter.HiddenTagsAny))
{
filterStr.Append(@"\gamedataor\" + filter.HiddenTagsAny);
}
if (filter.AppId != 0)
{
filterStr.Append(@"\appid\" + (ulong)filter.AppId);
}
if (!string.IsNullOrEmpty(filter.HostName))
{
filterStr.Append(@"\name_match\" + filter.HostName);
}
if (!string.IsNullOrEmpty(filter.Version))
{
filterStr.Append(@"\version_match\" + filter.Version);
}
if (filter.IsUniqueIPAddress)
{
filterStr.Append(@"\collapse_addr_hash\1");
}
if (!string.IsNullOrEmpty(filter.IPAddress))
{
filterStr.Append(@"\gameaddr\" + filter.IPAddress);
}
if (filter.ExcludeAny != null)
{
filterStr.Append("\0nor");
filterStr.Append(ProcessFilter(filter.ExcludeAny, true));
}
if (filter.ExcludeAll != null)
{
filterStr.Append("\0nand");
filterStr.Append(ProcessFilter(filter.ExcludeAll, true));
}
if (!isSubFilter)
{
string[] Parts = null;
string norStr = string.Empty, nandStr = string.Empty;
Parts = filterStr.ToString().Split('\0');
filterStr = new StringBuilder(Parts[0]);
for (int i = 1; i < Parts.Length; i++)
{
if (Parts[i].StartsWith("nor", StringComparison.OrdinalIgnoreCase))
{
norStr += Parts[i].Substring(3);
}
if (Parts[i].StartsWith("nand", StringComparison.OrdinalIgnoreCase))
{
nandStr += Parts[i].Substring(4);
}
}
if (!String.IsNullOrEmpty(norStr))
{
filterStr.Append(@"\nor\");
filterStr.Append(norStr.Count(x => x == '\\') / 2);
filterStr.Append(norStr);
}
if (!String.IsNullOrEmpty(nandStr))
{
filterStr.Append(@"\nand\");
filterStr.Append(nandStr.Count(x => x == '\\') / 2);
filterStr.Append(nandStr);
}
}
return(filterStr.ToString());
}
