/* * Copyright (c) Contributors, http://opensimulator.org/ * See CONTRIBUTORS.TXT for a full list of copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of the OpenSim Project nor the * names of its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ using System; using System.Reflection; using System.Net; using OpenSim.Framework; using OpenSim.Framework.Communications; using OpenMetaverse; using log4net; using Nini.Config; namespace OpenSim.Region.Framework.Scenes.Hypergrid { public class HGHyperlink { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); private static Random random = new Random(); public static RegionInfo TryLinkRegionToCoords(Scene m_scene, IClientAPI client, string mapName, uint xloc, uint yloc) { string host = "127.0.0.1"; string portstr; string regionName = ""; uint port = 9000; string[] parts = mapName.Split(new char[] { ':' }); if (parts.Length >= 1) { host = parts[0]; } if (parts.Length >= 2) { portstr = parts[1]; if (!UInt32.TryParse(portstr, out port)) regionName = parts[1]; } // always take the last one if (parts.Length >= 3) { regionName = parts[2]; } // Sanity check. Don't ever link to this sim. IPAddress ipaddr = null; try { ipaddr = Util.GetHostFromDNS(host); } catch { } if ((ipaddr != null) && !((m_scene.RegionInfo.ExternalEndPoint.Address.Equals(ipaddr)) && (m_scene.RegionInfo.HttpPort == port))) { RegionInfo regInfo; bool success = TryCreateLink(m_scene, client, xloc, yloc, regionName, port, host, out regInfo); if (success) { regInfo.RegionName = mapName; return regInfo; } } return null; } public static RegionInfo TryLinkRegion(Scene m_scene, IClientAPI client, string mapName) { uint xloc = (uint)(random.Next(0, Int16.MaxValue)); return TryLinkRegionToCoords(m_scene, client, mapName, xloc, 0); } public static bool TryCreateLink(Scene m_scene, IClientAPI client, uint xloc, uint yloc, string externalRegionName, uint externalPort, string externalHostName, out RegionInfo regInfo) { m_log.DebugFormat("[HGrid]: Link to {0}:{1}, in {2}-{3}", externalHostName, externalPort, xloc, yloc); regInfo = new RegionInfo(); regInfo.RegionName = externalRegionName; regInfo.HttpPort = externalPort; regInfo.ExternalHostName = externalHostName; regInfo.RegionLocX = xloc; regInfo.RegionLocY = yloc; try { regInfo.InternalEndPoint = new IPEndPoint(IPAddress.Parse("0.0.0.0"), (int)0); } catch (Exception e) { m_log.Warn("[HGrid]: Wrong format for link-region: " + e.Message); return false; } regInfo.RemotingAddress = regInfo.ExternalEndPoint.Address.ToString(); // Finally, link it try { m_scene.CommsManager.GridService.RegisterRegion(regInfo); } catch (Exception e) { m_log.Warn("[HGrid]: Unable to link region: " + e.Message); return false; } uint x, y; if (!Check4096(m_scene, regInfo, out x, out y)) { m_scene.CommsManager.GridService.DeregisterRegion(regInfo); if (client != null) client.SendAlertMessage("Region is too far (" + x + ", " + y + ")"); m_log.Info("[HGrid]: Unable to link, region is too far (" + x + ", " + y + ")"); return false; } if (!CheckCoords(m_scene.RegionInfo.RegionLocX, m_scene.RegionInfo.RegionLocY, x, y)) { m_scene.CommsManager.GridService.DeregisterRegion(regInfo); if (client != null) client.SendAlertMessage("Region has incompatible coordinates (" + x + ", " + y + ")"); m_log.Info("[HGrid]: Unable to link, region has incompatible coordinates (" + x + ", " + y + ")"); return false; } m_log.Debug("[HGrid]: link region succeeded"); return true; } /// /// Cope with this viewer limitation. /// /// /// public static bool Check4096(Scene m_scene, RegionInfo regInfo, out uint x, out uint y) { ulong realHandle; if (UInt64.TryParse(regInfo.regionSecret, out realHandle)) { Utils.LongToUInts(realHandle, out x, out y); x = x / Constants.RegionSize; y = y / Constants.RegionSize; if ((Math.Abs((int)m_scene.RegionInfo.RegionLocX - (int)x) >= 4096) || (Math.Abs((int)m_scene.RegionInfo.RegionLocY - (int)y) >= 4096)) { return false; } return true; } else { m_scene.CommsManager.GridService.RegisterRegion(regInfo); m_log.Debug("[HGrid]: Gnomes. Region deregistered."); x = y = 0; return false; } } public static bool CheckCoords(uint thisx, uint thisy, uint x, uint y) { if ((thisx == x) && (thisy == y)) return false; return true; } } }