From 6dcafec22d560c50625c8a391701606a1a0bb363 Mon Sep 17 00:00:00 2001 From: Adam Frisby Date: Mon, 11 May 2009 19:23:51 +0000 Subject: [PATCH] * Implements IP and DNS based ban facilities to OpenSim. * User interface is ... primitive at best right now. * Loads bans from bans.txt and region ban DB on startup, bans.txt is in the format of one per line. The following explains how they are read; DNS bans are in the form "somewhere.com" will block ANY matching domain (including "betasomewhere.com", "beta.somewhere.com", "somewhere.com.beta") - make sure to be reasonably specific in DNS bans. IP address bans match on first characters, so, "127.0.0.1" will ban only that address, "127.0.1" will ban "127.0.10.0" but "127.0.1." will ban only the "127.0.1.*" network --- .../Client/MXP/ClientStack/MXPClientView.cs | 11 +++ OpenSim/Framework/Client/IClientCore.cs | 9 +++ OpenSim/Framework/Client/IClientIPEndpoint.cs | 12 +++ .../ClientStack/LindenUDP/LLClientView.cs | 34 +++++++- .../CoreModules/Agent/IPBan/IPBanModule.cs | 81 +++++++++++++++++++ .../CoreModules/Agent/IPBan/SceneBanner.cs | 45 +++++++++++ 6 files changed, 191 insertions(+), 1 deletion(-) create mode 100644 OpenSim/Framework/Client/IClientIPEndpoint.cs create mode 100644 OpenSim/Region/CoreModules/Agent/IPBan/IPBanModule.cs create mode 100644 OpenSim/Region/CoreModules/Agent/IPBan/SceneBanner.cs diff --git a/OpenSim/Client/MXP/ClientStack/MXPClientView.cs b/OpenSim/Client/MXP/ClientStack/MXPClientView.cs index c9e56e6392..e5f747437d 100644 --- a/OpenSim/Client/MXP/ClientStack/MXPClientView.cs +++ b/OpenSim/Client/MXP/ClientStack/MXPClientView.cs @@ -1605,6 +1605,17 @@ namespace OpenSim.Client.MXP.ClientStack return default(T); } + public void Disconnect(string reason) + { + Kick(reason); + Close(true); + } + + public void Disconnect() + { + Close(true); + } + #endregion public void SendCreateGroupReply(UUID groupID, bool success, string message) diff --git a/OpenSim/Framework/Client/IClientCore.cs b/OpenSim/Framework/Client/IClientCore.cs index 78f041121a..1d08fb910f 100644 --- a/OpenSim/Framework/Client/IClientCore.cs +++ b/OpenSim/Framework/Client/IClientCore.cs @@ -25,11 +25,20 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +using OpenMetaverse; + namespace OpenSim.Framework.Client { public interface IClientCore { bool TryGet(out T iface); T Get(); + + // Basic Interfaces + UUID AgentId { get; } + + void Disconnect(string reason); + void Disconnect(); + } } \ No newline at end of file diff --git a/OpenSim/Framework/Client/IClientIPEndpoint.cs b/OpenSim/Framework/Client/IClientIPEndpoint.cs new file mode 100644 index 0000000000..b80dea5bed --- /dev/null +++ b/OpenSim/Framework/Client/IClientIPEndpoint.cs @@ -0,0 +1,12 @@ +using System; +using System.Collections.Generic; +using System.Net; +using System.Text; + +namespace OpenSim.Framework.Client +{ + public interface IClientIPEndpoint + { + IPAddress EndPoint { get; } + } +} diff --git a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs index f9db91ca18..a157df5811 100644 --- a/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs +++ b/OpenSim/Region/ClientStack/LindenUDP/LLClientView.cs @@ -54,7 +54,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP /// Handles new client connections /// Constructor takes a single Packet and authenticates everything /// - public class LLClientView : IClientAPI, IClientCore, IClientIM, IClientChat, IStatsCollector + public class LLClientView : IClientAPI, IClientCore, IClientIM, IClientChat, IClientIPEndpoint, IStatsCollector { private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType); @@ -10478,6 +10478,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP { RegisterInterface(this); RegisterInterface(this); + RegisterInterface(this); } public bool TryGet(out T iface) @@ -10496,6 +10497,19 @@ namespace OpenSim.Region.ClientStack.LindenUDP return (T)m_clientInterfaces[typeof(T)]; } + public void Disconnect(string reason) + { + Kick(reason); + Thread.Sleep(1000); + Close(true); + } + + public void Disconnect() + { + Close(true); + } + + #endregion private void RefreshGroupMembership() @@ -10587,5 +10601,23 @@ namespace OpenSim.Region.ClientStack.LindenUDP { return ""; } + + #region IClientIPEndpoint Members + + public IPAddress EndPoint + { + get + { + if(m_userEndPoint is IPEndPoint) + { + IPEndPoint ep = (IPEndPoint)m_userEndPoint; + + return ep.Address; + } + return null; + } + } + + #endregion } } diff --git a/OpenSim/Region/CoreModules/Agent/IPBan/IPBanModule.cs b/OpenSim/Region/CoreModules/Agent/IPBan/IPBanModule.cs new file mode 100644 index 0000000000..b904cb0fbc --- /dev/null +++ b/OpenSim/Region/CoreModules/Agent/IPBan/IPBanModule.cs @@ -0,0 +1,81 @@ +using System; +using System.Collections.Generic; +using System.IO; +using System.Text; +using Nini.Config; +using OpenSim.Framework; +using OpenSim.Region.Framework.Interfaces; +using OpenSim.Region.Framework.Scenes; + +namespace OpenSim.Region.CoreModules.Agent.IPBan +{ + public class IPBanModule : IRegionModule + { + #region Implementation of IRegionModule + + private List m_bans = new List(); + + public void Initialise(Scene scene, IConfigSource source) + { + new SceneBanner(scene, m_bans); + + lock(m_bans) + { + foreach (EstateBan ban in scene.RegionInfo.EstateSettings.EstateBans) + { + if(!String.IsNullOrEmpty(ban.BannedHostIPMask)) + m_bans.Add(ban.BannedHostIPMask); + if (!String.IsNullOrEmpty(ban.BannedHostNameMask)) + m_bans.Add(ban.BannedHostNameMask); + } + } + } + + public void PostInitialise() + { + if(File.Exists("bans.txt")) + { + string[] bans = File.ReadAllLines("bans.txt"); + foreach (string ban in bans) + { + m_bans.Add(ban); + } + } + } + + public void Close() + { + + } + + public string Name + { + get { return "IPBanModule"; } + } + + public bool IsSharedModule + { + get { return true; } + } + + #endregion + + /// + /// Bans all users from the specified network from connecting. + /// DNS bans are in the form "somewhere.com" will block ANY + /// matching domain (including "betasomewhere.com", "beta.somewhere.com", + /// "somewhere.com.beta") - make sure to be reasonably specific in DNS + /// bans. + /// + /// IP address bans match on first characters, so, + /// "127.0.0.1" will ban only that address, + /// "127.0.1" will ban "127.0.10.0" + /// but "127.0.1." will ban only the "127.0.1.*" network + /// + /// See summary for explanation of parameter + public void Ban(string host) + { + m_bans.Add(host); + } + } +} diff --git a/OpenSim/Region/CoreModules/Agent/IPBan/SceneBanner.cs b/OpenSim/Region/CoreModules/Agent/IPBan/SceneBanner.cs new file mode 100644 index 0000000000..1d8da46b68 --- /dev/null +++ b/OpenSim/Region/CoreModules/Agent/IPBan/SceneBanner.cs @@ -0,0 +1,45 @@ +using System.Collections.Generic; +using System.Net; +using OpenSim.Framework.Client; +using OpenSim.Region.Framework.Scenes; + +namespace OpenSim.Region.CoreModules.Agent.IPBan +{ + internal class SceneBanner + { + private static readonly log4net.ILog m_log + = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType); + + private List bans; + private SceneBase m_scene; + public SceneBanner(SceneBase scene, List banList) + { + scene.EventManager.OnClientConnect += EventManager_OnClientConnect; + + bans = banList; + m_scene = scene; + } + + void EventManager_OnClientConnect(IClientCore client) + { + IClientIPEndpoint ipEndpoint; + if(client.TryGet(out ipEndpoint)) + { + IPAddress end = ipEndpoint.EndPoint; + + IPHostEntry rDNS = Dns.GetHostEntry(end); + foreach (string ban in bans) + { + if (rDNS.HostName.Contains(ban) || + end.ToString().StartsWith(ban)) + { + client.Disconnect("Banned - network \"" + ban + "\" is not allowed to connect to this server."); + m_log.Warn("[IPBAN] Disconnected '" + end + "' due to '" + ban + "' ban."); + return; + } + } + m_log.Warn("[IPBAN] User '" + end + "' not in any ban lists. Allowing connection."); + } + } + } +}