mirror of
https://github.com/Ylianst/MeshCentralRouter
synced 2025-12-06 00:13:33 +00:00
663 lines
29 KiB
C#
663 lines
29 KiB
C#
/*
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Copyright 2009-2018 Intel Corporation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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using System;
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using System.IO;
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using System.Net;
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using System.Web;
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using System.Text;
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using System.Collections;
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using System.Net.Sockets;
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using System.Net.Security;
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using System.Windows.Forms;
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using System.Collections.Generic;
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using System.Deployment.Application;
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using System.Collections.Specialized;
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using System.Web.Script.Serialization;
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using System.Security.Cryptography.X509Certificates;
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using Microsoft.Win32;
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namespace MeshCentralRouter
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{
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public class MeshCentralServer
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{
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private Uri wsurl = null;
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private string user = null;
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private string pass = null;
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private string token = null;
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private xwebclient wc = null;
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//private System.Timers.Timer procTimer = new System.Timers.Timer(5000);
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private int constate = 0;
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public Dictionary<string, NodeClass> nodes = null;
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public Dictionary<string, MeshClass> meshes = null;
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public string disconnectCause = null;
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public string disconnectMsg = null;
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public X509Certificate2 disconnectCert;
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public string authCookie = null;
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public string loginCookie = null;
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public string wshash = null;
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public string okCertHash = null;
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public bool debug = false;
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public bool ignoreCert = false;
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public static void saveToRegistry(string name, string value)
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{
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try { Registry.SetValue(@"HKEY_CURRENT_USER\SOFTWARE\OpenSource\MeshRouter", name, value); } catch (Exception) { }
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}
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public static string loadFromRegistry(string name)
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{
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try { return Registry.GetValue(@"HKEY_CURRENT_USER\SOFTWARE\OpenSource\MeshRouter", name, "").ToString(); } catch (Exception) { return ""; }
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}
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public static string GetProxyForUrlUsingPac(string DestinationUrl, string PacUri)
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{
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IntPtr WinHttpSession = Win32Api.WinHttpOpen("User", Win32Api.WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, IntPtr.Zero, IntPtr.Zero, 0);
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Win32Api.WINHTTP_AUTOPROXY_OPTIONS ProxyOptions = new Win32Api.WINHTTP_AUTOPROXY_OPTIONS();
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Win32Api.WINHTTP_PROXY_INFO ProxyInfo = new Win32Api.WINHTTP_PROXY_INFO();
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ProxyOptions.dwFlags = Win32Api.WINHTTP_AUTOPROXY_CONFIG_URL;
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ProxyOptions.dwAutoDetectFlags = (Win32Api.WINHTTP_AUTO_DETECT_TYPE_DHCP | Win32Api.WINHTTP_AUTO_DETECT_TYPE_DNS_A);
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ProxyOptions.lpszAutoConfigUrl = PacUri;
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// Get Proxy
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bool IsSuccess = Win32Api.WinHttpGetProxyForUrl(WinHttpSession, DestinationUrl, ref ProxyOptions, ref ProxyInfo);
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Win32Api.WinHttpCloseHandle(WinHttpSession);
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if (IsSuccess)
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{
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return ProxyInfo.lpszProxy;
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}
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else
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{
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Console.WriteLine("Error: {0}", Win32Api.GetLastError());
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return null;
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}
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}
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// Parse the URL query parameters and returns a collection
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public static NameValueCollection GetQueryStringParameters()
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{
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NameValueCollection nameValueTable = new NameValueCollection();
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if (ApplicationDeployment.IsNetworkDeployed)
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{
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string queryString = ApplicationDeployment.CurrentDeployment.ActivationUri.Query;
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nameValueTable = HttpUtility.ParseQueryString(queryString);
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}
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return (nameValueTable);
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}
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// Starts the routing server, called when the start button is pressed
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public void connect(Uri wsurl, string user, string pass, string token)
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{
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this.user = user;
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this.pass = pass;
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this.token = token;
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this.wsurl = wsurl;
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wc = new xwebclient();
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//Debug("#" + counter + ": Connecting web socket to: " + wsurl.ToString());
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wc.Start(this, wsurl, user, pass, token, wshash);
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if (debug) { File.AppendAllText("debug.log", "Connect-" + wsurl + "\r\n"); }
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wc.xdebug = debug;
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wc.xignoreCert = ignoreCert;
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}
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public void disconnect()
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{
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if (wc != null)
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{
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wc.Dispose();
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wc = null;
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if (debug) { File.AppendAllText("debug.log", "Disconnect\r\n"); }
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}
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}
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public void refreshCookies()
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{
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if (wc != null) {
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if (debug) { File.AppendAllText("debug.log", "RefreshCookies\r\n"); }
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wc.WriteStringWebSocket("{\"action\":\"authcookie\"}");
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wc.WriteStringWebSocket("{\"action\":\"logincookie\"}");
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}
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}
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public void processServerData(string data)
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{
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if (debug) { File.AppendAllText("debug.log", "ServerData-" + data + "\r\n"); }
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// Parse the received JSON
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Dictionary<string, object> jsonAction = new Dictionary<string, object>();
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jsonAction = new JavaScriptSerializer().Deserialize<Dictionary<string, object>>(data);
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if (jsonAction == null || jsonAction["action"].GetType() != typeof(string)) return;
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string action = jsonAction["action"].ToString();
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switch (action)
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{
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case "close":
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{
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disconnectCause = jsonAction["cause"].ToString();
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disconnectMsg = jsonAction["msg"].ToString();
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break;
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}
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case "serverinfo":
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{
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wc.WriteStringWebSocket("{\"action\":\"meshes\"}");
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wc.WriteStringWebSocket("{\"action\":\"nodes\"}");
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wc.WriteStringWebSocket("{\"action\":\"authcookie\"}");
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wc.WriteStringWebSocket("{\"action\":\"logincookie\"}");
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break;
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}
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case "authcookie":
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{
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authCookie = jsonAction["cookie"].ToString();
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changeState(2);
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break;
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}
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case "logincookie":
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{
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loginCookie = jsonAction["cookie"].ToString();
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if (onLoginTokenChanged != null) { onLoginTokenChanged(); }
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break;
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}
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case "userinfo":
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{
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break;
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}
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case "event":
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{
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Dictionary<string, object> ev = (Dictionary<string, object>)jsonAction["event"];
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string action2 = ev["action"].ToString();
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switch (action2)
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{
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case "changenode":
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{
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Dictionary<string, object> node = (Dictionary<string, object>)ev["node"];
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string nodeid = (string)node["_id"];
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if (nodes.ContainsKey(nodeid))
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{
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NodeClass n = (NodeClass)nodes[nodeid];
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n.nodeid = (string)node["_id"];
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n.name = (string)node["name"];
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if (node.ContainsKey("conn")) { n.conn = (int)node["conn"]; }
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n.icon = (int)node["icon"];
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nodes[n.nodeid] = n;
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if (onNodesChanged != null) onNodesChanged();
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}
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break;
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}
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case "nodeconnect":
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{
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string nodeid = (string)ev["nodeid"];
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if (nodes.ContainsKey(nodeid))
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{
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NodeClass n = (NodeClass)nodes[nodeid];
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if (ev.ContainsKey("conn")) { n.conn = (int)ev["conn"]; }
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nodes[n.nodeid] = n;
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if (onNodesChanged != null) onNodesChanged();
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}
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break;
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}
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}
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break;
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}
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case "meshes":
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{
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meshes = new Dictionary<string, MeshClass>();
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ArrayList meshList = (ArrayList)jsonAction["meshes"];
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for (int i = 0; i < meshList.Count; i++)
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{
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Dictionary<string, object> mesh = (Dictionary<string, object>)meshList[i];
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MeshClass m = new MeshClass();
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m.meshid = (string)mesh["_id"];
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m.name = (string)mesh["name"];
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m.desc = (string)mesh["desc"];
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if (mesh["mtype"].GetType() == typeof(string)) { m.type = int.Parse((string)mesh["mtype"]); }
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if (mesh["mtype"].GetType() == typeof(int)) { m.type = (int)mesh["mtype"]; }
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meshes[m.meshid] = m;
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}
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break;
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}
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case "nodes":
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{
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nodes = new Dictionary<string, NodeClass>();
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Dictionary<string, object> groups = (Dictionary<string, object>)jsonAction["nodes"];
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foreach (string meshid in groups.Keys)
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{
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ArrayList nodesinMesh = (ArrayList)groups[meshid];
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for (int i = 0; i < nodesinMesh.Count; i++)
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{
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Dictionary<string, object> node = (Dictionary<string, object>)nodesinMesh[i];
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NodeClass n = new NodeClass();
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n.nodeid = (string)node["_id"];
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n.name = (string)node["name"];
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n.meshid = meshid;
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if (node.ContainsKey("conn")) { n.conn = (int)node["conn"]; } else { n.conn = 0; }
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n.icon = (int)node["icon"];
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nodes[n.nodeid] = n;
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}
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}
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if (onNodesChanged != null) onNodesChanged();
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break;
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}
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default:
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{
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break;
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}
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}
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}
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public delegate void onStateChangedHandler(int state);
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public event onStateChangedHandler onStateChanged;
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public void changeState(int newState) { if (constate != newState) { constate = newState; if (onStateChanged != null) { onStateChanged(constate); } } }
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public delegate void onNodeListChangedHandler();
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public event onNodeListChangedHandler onNodesChanged;
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public delegate void onLoginTokenChangedHandler();
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public event onLoginTokenChangedHandler onLoginTokenChanged;
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private class xwebclient : IDisposable
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{
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private MeshCentralServer parent = null;
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private TcpClient wsclient = null;
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private SslStream wsstream = null;
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private NetworkStream wsrawstream = null;
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private int state = 0;
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private Uri url = null;
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private byte[] readBuffer = new Byte[500];
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private int readBufferLen = 0;
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private int accopcodes = 0;
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private bool accmask = false;
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private int acclen = 0;
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private bool proxyInUse = false;
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private string user = null;
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private string pass = null;
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private string token = null;
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public bool xdebug = false;
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public bool xignoreCert = false;
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public void Dispose() {
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try { wsstream.Close(); } catch (Exception) { }
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try { wsstream.Dispose(); } catch (Exception) { }
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wsstream = null;
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wsclient = null;
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state = -1;
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parent.changeState(0);
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parent.wshash = null;
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}
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public void Debug(string msg) { if (xdebug) { try { File.AppendAllText("debug.log", "Debug-" + msg + "\r\n"); } catch (Exception) { } } }
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public bool Start(MeshCentralServer parent, Uri url, string user, string pass, string token, string fingerprint)
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{
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if (state != 0) return false;
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parent.changeState(1);
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state = 1;
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this.parent = parent;
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this.url = url;
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this.user = user;
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this.pass = pass;
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this.token = token;
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Uri proxyUri = null;
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// Check if we need to use a HTTP proxy (Auto-proxy way)
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try {
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RegistryKey registryKey = Registry.CurrentUser.OpenSubKey("Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", true);
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Object x = registryKey.GetValue("AutoConfigURL", null);
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if ((x != null) && (x.GetType() == typeof(string))) {
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string proxyStr = GetProxyForUrlUsingPac("http" + ((url.Port == 80) ? "" : "s") + "://" + url.Host + ":" + url.Port, x.ToString());
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if (proxyStr != null) { proxyUri = new Uri("http://" + proxyStr); }
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}
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} catch (Exception) { proxyUri = null; }
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// Check if we need to use a HTTP proxy (Normal way)
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if (proxyUri == null) {
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var proxy = System.Net.HttpWebRequest.GetSystemWebProxy();
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proxyUri = proxy.GetProxy(url);
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if ((url.Host.ToLower() == proxyUri.Host.ToLower()) && (url.Port == proxyUri.Port)) { proxyUri = null; }
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}
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if (proxyUri != null)
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{
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// Proxy in use
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proxyInUse = true;
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wsclient = new TcpClient();
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wsclient.BeginConnect(proxyUri.Host, proxyUri.Port, new AsyncCallback(OnConnectSink), this);
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}
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else
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{
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// No proxy in use
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proxyInUse = false;
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wsclient = new TcpClient();
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wsclient.BeginConnect(url.Host, url.Port, new AsyncCallback(OnConnectSink), this);
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}
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return true;
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}
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private void OnConnectSink(IAsyncResult ar)
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{
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if (wsclient == null) return;
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// Accept the connection
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try
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{
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wsclient.EndConnect(ar);
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} catch (Exception ex) {
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Debug("Websocket TCP failed to connect: " + ex.ToString());
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Dispose();
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return;
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}
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if (proxyInUse == true)
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{
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// Send proxy connection request
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wsrawstream = wsclient.GetStream();
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byte[] proxyRequestBuf = UTF8Encoding.UTF8.GetBytes("CONNECT " + url.Host + ":" + url.Port + " HTTP/1.1\r\nHost: " + url.Host + ":" + url.Port + "\r\n\r\n");
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wsrawstream.Write(proxyRequestBuf, 0, proxyRequestBuf.Length);
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wsrawstream.BeginRead(readBuffer, readBufferLen, readBuffer.Length - readBufferLen, new AsyncCallback(OnProxyResponseSink), this);
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}
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else
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{
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// Start TLS connection
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Debug("Websocket TCP connected, doing TLS...");
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wsstream = new SslStream(wsclient.GetStream(), false, VerifyServerCertificate, null);
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wsstream.BeginAuthenticateAsClient(url.Host, null, System.Security.Authentication.SslProtocols.Tls12, false, new AsyncCallback(OnTlsSetupSink), this);
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}
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}
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private void OnProxyResponseSink(IAsyncResult ar)
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{
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if (wsrawstream == null) return;
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int len = 0;
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try { len = wsrawstream.EndRead(ar); } catch (Exception) { }
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if (len == 0)
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{
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// Disconnect
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Debug("Websocket proxy disconnected, length = 0.");
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Dispose();
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return;
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}
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readBufferLen += len;
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string proxyResponse = UTF8Encoding.UTF8.GetString(readBuffer, 0, readBufferLen);
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if (proxyResponse.IndexOf("\r\n\r\n") >= 0)
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{
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// We get a full proxy response, we should get something like "HTTP/1.1 200 Connection established\r\n\r\n"
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if (proxyResponse.StartsWith("HTTP/1.1 200 "))
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{
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// All good, start TLS setup.
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readBufferLen = 0;
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Debug("Websocket TCP connected, doing TLS...");
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wsstream = new SslStream(wsrawstream, false, VerifyServerCertificate, null);
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wsstream.BeginAuthenticateAsClient(url.Host, null, System.Security.Authentication.SslProtocols.Tls12, false, new AsyncCallback(OnTlsSetupSink), this);
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}
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else
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{
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// Invalid response
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Debug("Proxy connection failed: " + proxyResponse);
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Dispose();
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}
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} else {
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if (readBufferLen == readBuffer.Length)
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{
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// Buffer overflow
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Debug("Proxy connection failed");
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Dispose();
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}
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else
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{
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// Read more proxy data
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wsrawstream.BeginRead(readBuffer, readBufferLen, readBuffer.Length - readBufferLen, new AsyncCallback(OnProxyResponseSink), this);
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}
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}
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}
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public string Base64Encode(string plainText)
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{
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var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
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return System.Convert.ToBase64String(plainTextBytes);
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}
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public string Base64Decode(string base64EncodedData)
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{
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var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
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return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
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}
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private void OnTlsSetupSink(IAsyncResult ar)
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{
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if (wsstream == null) return;
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// Accept the connection
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try
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{
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wsstream.EndAuthenticateAsClient(ar);
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}
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catch (Exception ex)
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{
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// Disconnect
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MessageBox.Show(ex.Message, "MeshRouter");
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Debug("Websocket TLS failed: " + ex.ToString());
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Dispose();
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return;
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}
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// Fetch remote certificate
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parent.wshash = wsstream.RemoteCertificate.GetCertHashString();
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// Setup extra headers if needed
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string extraHeaders = "";
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if (user != null && pass != null && token != null) { extraHeaders = "x-meshauth: " + Base64Encode(user) + "," + Base64Encode(pass) + "," + Base64Encode(token) + "\r\n"; }
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else if (user != null && pass != null) { extraHeaders = "x-meshauth: " + Base64Encode(user) + "," + Base64Encode(pass) + "\r\n"; }
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// Send the HTTP headers
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Debug("Websocket TLS setup, sending HTTP header...");
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string header = "GET " + url.PathAndQuery + " HTTP/1.1\r\nHost: " + url.Host + "\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\nSec-WebSocket-Version: 13\r\n" + extraHeaders + "\r\n";
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wsstream.Write(UTF8Encoding.UTF8.GetBytes(header));
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// Start receiving data
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wsstream.BeginRead(readBuffer, readBufferLen, readBuffer.Length - readBufferLen, new AsyncCallback(OnTlsDataSink), this);
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}
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private void OnTlsDataSink(IAsyncResult ar)
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{
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if (wsstream == null) return;
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int len = 0;
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try { len = wsstream.EndRead(ar); } catch (Exception) { }
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if (len == 0)
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{
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// Disconnect
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Debug("Websocket disconnected, length = 0.");
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Dispose();
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return;
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}
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//parent.Debug("#" + counter + ": Websocket got new data: " + len);
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readBufferLen += len;
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// Consume all of the data
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int consumed = 0;
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int ptr = 0;
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do
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{
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consumed = ProcessBuffer(readBuffer, ptr, readBufferLen - ptr);
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if (consumed < 0) { Dispose(); return; } // Error, close the connection
|
|
ptr += consumed;
|
|
} while ((consumed > 0) && ((readBufferLen - consumed) > 0));
|
|
|
|
// Move the data forward
|
|
if ((ptr > 0) && (readBufferLen - ptr) > 0) {
|
|
//Console.Write("MOVE FORWARD\r\n");
|
|
Array.Copy(readBuffer, ptr, readBuffer, 0, (readBufferLen - ptr));
|
|
}
|
|
readBufferLen = (readBufferLen - ptr);
|
|
|
|
// If the buffer is too small, double the size here.
|
|
if (readBuffer.Length - readBufferLen == 0)
|
|
{
|
|
Debug("Increasing the read buffer size from " + readBuffer.Length + " to " + (readBuffer.Length * 2) + ".");
|
|
byte[] readBuffer2 = new byte[readBuffer.Length * 2];
|
|
Array.Copy(readBuffer, 0, readBuffer2, 0, readBuffer.Length);
|
|
readBuffer = readBuffer2;
|
|
}
|
|
|
|
// Receive more data
|
|
try { wsstream.BeginRead(readBuffer, readBufferLen, readBuffer.Length - readBufferLen, new AsyncCallback(OnTlsDataSink), this); } catch (Exception) { }
|
|
}
|
|
|
|
private int ProcessBuffer(byte[] buffer, int offset, int len)
|
|
{
|
|
string ss = UTF8Encoding.UTF8.GetString(buffer, offset, len);
|
|
|
|
if (state == 1)
|
|
{
|
|
// Look for the end of the http header
|
|
string header = UTF8Encoding.UTF8.GetString(buffer, offset, len);
|
|
int i = header.IndexOf("\r\n\r\n");
|
|
if (i == -1) return 0;
|
|
Dictionary<string, string> parsedHeader = ParseHttpHeader(header.Substring(0, i));
|
|
if ((parsedHeader == null) || (parsedHeader["_Path"] != "101")) { Debug("Websocket bad header."); return -1; } // Bad header, close the connection
|
|
Debug("Websocket got setup upgrade header.");
|
|
state = 2;
|
|
return len; // TODO: Technically we need to return the header length before UTF8 convert.
|
|
} else if (state == 2) {
|
|
// Parse a websocket fragment header
|
|
if (len < 2) return 0;
|
|
int headsize = 2;
|
|
accopcodes = buffer[offset];
|
|
accmask = ((buffer[offset + 1] & 0x80) != 0);
|
|
acclen = (buffer[offset + 1] & 0x7F);
|
|
|
|
if ((accopcodes & 0x0F) == 8)
|
|
{
|
|
// Close the websocket
|
|
Debug("Websocket got closed fragment.");
|
|
return -1;
|
|
}
|
|
|
|
if (acclen == 126)
|
|
{
|
|
if (len < 4) return 0;
|
|
headsize = 4;
|
|
acclen = (buffer[offset + 2] << 8) + (buffer[offset + 3]);
|
|
}
|
|
else if (acclen == 127)
|
|
{
|
|
if (len < 10) return 0;
|
|
headsize = 10;
|
|
acclen = (buffer[offset + 6] << 24) + (buffer[offset + 7] << 16) + (buffer[offset + 8] << 8) + (buffer[offset + 9]);
|
|
Debug("Websocket receive large fragment: " + acclen);
|
|
}
|
|
if (accmask == true)
|
|
{
|
|
// TODO: Do unmasking here.
|
|
headsize += 4;
|
|
}
|
|
//parent.Debug("#" + counter + ": Websocket frag header - FIN: " + ((accopcodes & 0x80) != 0) + ", OP: " + (accopcodes & 0x0F) + ", LEN: " + acclen + ", MASK: " + accmask);
|
|
state = 3;
|
|
return headsize;
|
|
}
|
|
else if (state == 3)
|
|
{
|
|
// Parse a websocket fragment data
|
|
if (len < acclen) return 0;
|
|
//Console.Write("WSREAD: " + acclen + "\r\n");
|
|
ProcessWsBuffer(buffer, offset, acclen, accopcodes);
|
|
state = 2;
|
|
return acclen;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
private void ProcessWsBuffer(byte[] data, int offset, int len, int op)
|
|
{
|
|
Debug("Websocket got data.");
|
|
try { parent.processServerData(UTF8Encoding.UTF8.GetString(data, offset, len)); } catch (Exception) { }
|
|
}
|
|
|
|
private Dictionary<string, string> ParseHttpHeader(string header)
|
|
{
|
|
string[] lines = header.Replace("\r\n", "\r").Split('\r');
|
|
if (lines.Length < 2) { return null; }
|
|
string[] directive = lines[0].Split(' ');
|
|
Dictionary<string, string> values = new Dictionary<string, string>();
|
|
values["_Action"] = directive[0];
|
|
values["_Path"] = directive[1];
|
|
values["_Protocol"] = directive[2];
|
|
for (int i = 1; i < lines.Length; i++)
|
|
{
|
|
var j = lines[i].IndexOf(":");
|
|
values[lines[i].Substring(0, j).ToLower()] = lines[i].Substring(j + 1).Trim();
|
|
}
|
|
return values;
|
|
}
|
|
|
|
private bool VerifyServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
|
|
{
|
|
if (xignoreCert) return true;
|
|
if (chain.Build(new X509Certificate2(certificate)) == true) return true;
|
|
|
|
// Check that the remote certificate is the expected one
|
|
if ((parent.okCertHash != null) && (parent.okCertHash == certificate.GetCertHashString())) return true;
|
|
|
|
parent.disconnectMsg = "cert";
|
|
parent.disconnectCert = new X509Certificate2(certificate);
|
|
return false;
|
|
}
|
|
|
|
public void WriteStringWebSocket(string data)
|
|
{
|
|
// Convert the string into a buffer with 4 byte of header space.
|
|
int len = UTF8Encoding.UTF8.GetByteCount(data);
|
|
byte[] buf = new byte[4 + len];
|
|
UTF8Encoding.UTF8.GetBytes(data, 0, data.Length, buf, 4);
|
|
len = buf.Length - 4;
|
|
|
|
// Check that everything is ok
|
|
if ((state < 2) || (len < 1) || (len > 65535)) { Dispose(); return; }
|
|
|
|
//Console.Write("Length: " + len + "\r\n");
|
|
//System.Threading.Thread.Sleep(0);
|
|
|
|
if (len < 126)
|
|
{
|
|
// Small fragment
|
|
buf[2] = 130; // Fragment op code (129 = text, 130 = binary)
|
|
buf[3] = (byte)(len & 0x7F);
|
|
//try { wsstream.BeginWrite(buf, 2, len + 2, new AsyncCallback(WriteWebSocketAsyncDone), args); } catch (Exception) { Dispose(); return; }
|
|
wsstream.Write(buf, 2, len + 2);
|
|
}
|
|
else
|
|
{
|
|
// Large fragment
|
|
buf[0] = 130; // Fragment op code (129 = text, 130 = binary)
|
|
buf[1] = 126;
|
|
buf[2] = (byte)((len >> 8) & 0xFF);
|
|
buf[3] = (byte)(len & 0xFF);
|
|
//try { wsstream.BeginWrite(buf, 0, len + 4, new AsyncCallback(WriteWebSocketAsyncDone), args); } catch (Exception) { Dispose(); return; }
|
|
wsstream.Write(buf, 0, len + 4);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
} |