SMTP palvelin

STMPServer/STMPServer.sln

+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31205.134
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "STMPServer", "STMPServer\STMPServer.csproj", "{805BB2D5-8AB1-4C71-A554-7DE78B177C43}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{805BB2D5-8AB1-4C71-A554-7DE78B177C43}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{805BB2D5-8AB1-4C71-A554-7DE78B177C43}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{805BB2D5-8AB1-4C71-A554-7DE78B177C43}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{805BB2D5-8AB1-4C71-A554-7DE78B177C43}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {D4E7161E-2448-4CF9-B3E1-FC167ED14DBA}
+	EndGlobalSection
+EndGlobal

STMPServer/STMPServer/Program.cs

+using System;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+
+namespace STMPServer
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            int port = 25000;
+            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+            IPEndPoint iep = new IPEndPoint(IPAddress.Loopback, port);
+            socket.Bind(iep);
+            // Kuinka monta asiakasta saa olla 
+            socket.Listen(1);
+            bool while_on = true;
+            Console.WriteLine("SMTP Palvelin käynnissä portissa: " + port);
+            while(while_on)
+            {
+                Socket asiakas = socket.Accept();
+                string ip = ((IPEndPoint)(asiakas.RemoteEndPoint)).Address.ToString();
+                string asiakas_port = ((IPEndPoint)(asiakas.RemoteEndPoint)).Port.ToString();
+                Console.WriteLine("Uusi asiakas: {0} portista: {1}", ip, asiakas_port);
+                // Aloitetaan keskustelu
+                asiakas.Send(Encoding.UTF8.GetBytes("220 TIES323 Postipalvelin\r\n"));
+                bool keskustelu = true;
+                bool data_vipu = false;
+                while(keskustelu)
+                {
+                    byte[] buffer = new byte[2048];
+                    asiakas.Receive(buffer);
+                    string asiakas_vastaus = Encoding.UTF8.GetString(buffer);
+                    Console.WriteLine("[{0}:{1}]: {2}",ip,asiakas_port,asiakas_vastaus);
+                    string[] lines = asiakas_vastaus.Split(
+                        new[] { "\r\n", "\r", "\n" },
+                            StringSplitOptions.None
+                        );
+
+                    int tila = 0;
+                    if(data_vipu)
+                    {
+                        tila = ValidoiData(lines, asiakas);
+                    } else
+                    {
+                        tila = ValidoiVastaus(lines[0], asiakas, data_vipu);
+                    }
+                    switch (tila)
+                    {
+                        case 1:
+                            data_vipu = true;
+                            break;
+                        case 2:
+                            asiakas.Close();
+                            keskustelu = false;
+                            break;
+                        default:
+                            data_vipu = false;
+                            break;
+                    }
+                }
+            }
+            Console.ReadKey();
+            socket.Close();
+        }
+
+        static int ValidoiVastaus(string vastaus, Socket socket, bool data_vipu)
+        {
+            int tila = 0;
+            string msg = "500 Syntax error!";
+            
+            if(vastaus.Split(' ')[0] == "HELO")
+            {
+                string ip = ((IPEndPoint)(socket.RemoteEndPoint)).Address.ToString();
+                msg = "250 TIES323 Postipalvelin HELO " + ip;
+            } 
+            else if (vastaus.Split(':')[0] == "MAIL FROM")
+            {
+                msg = "250 2.1.0 Sender... " + vastaus.Split(':')[1].Trim() + " you are ok.";
+            } 
+            else if (vastaus.Split(':')[0] == "RCPT TO")
+            {
+                msg = "250 2.1.5 Recipient... " + vastaus.Split(':')[1].Trim() + " is ok!";
+            } 
+            else if (vastaus == "DATA")
+            {
+                msg = "354 Enter mail, end with \".\" n a line by itself";
+                tila = 1;
+            }
+            else if (vastaus == "QUIT")
+            {
+                msg = "221 2.0.0 TIES323 postipalvelin sulkee yhteyden...";
+                tila = 2;
+            } 
+
+            VastaaAsiakas(msg, socket);
+            return tila;
+        }
+
+        static int ValidoiData(string[] arr, Socket socket)
+        {
+            string[] data;
+            for(int i = 0; i < arr.Length - 1; i++)
+            {
+                if(arr[i] == ".")
+                {
+                    string msg = "250 2.0.0 Message displayed on Server Screen.";
+                    VastaaAsiakas(msg, socket);
+                    return 0;
+                }
+            }
+            return 1;
+        }
+
+        static void VastaaAsiakas(string msg, Socket asiakas)
+        {
+            byte[] respond = Encoding.UTF8.GetBytes(msg + "\r\n");
+            asiakas.Send(respond);
+        }
+    }
+}

STMPServer/STMPServer/STMPServer.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>

STMPServer/STMPServer/bin/Debug/netcoreapp3.1/STMPServer.deps.json

+{
+  "runtimeTarget": {
+    "name": ".NETCoreApp,Version=v3.1",
+    "signature": ""
+  },
+  "compilationOptions": {},
+  "targets": {
+    ".NETCoreApp,Version=v3.1": {
+      "STMPServer/1.0.0": {
+        "runtime": {
+          "STMPServer.dll": {}
+        }
+      }
+    }
+  },
+  "libraries": {
+    "STMPServer/1.0.0": {
+      "type": "project",
+      "serviceable": false,
+      "sha512": ""
+    }
+  }
+}
\ No newline at end of file

STMPServer/STMPServer/bin/Debug/netcoreapp3.1/STMPServer.runtimeconfig.dev.json

+{
+  "runtimeOptions": {
+    "additionalProbingPaths": [
+      "C:\\Users\\Joppe\\.dotnet\\store\\|arch|\\|tfm|",
+      "C:\\Users\\Joppe\\.nuget\\packages"
+    ]
+  }
+}
\ No newline at end of file

STMPServer/STMPServer/bin/Debug/netcoreapp3.1/STMPServer.runtimeconfig.json

+{
+  "runtimeOptions": {
+    "tfm": "netcoreapp3.1",
+    "framework": {
+      "name": "Microsoft.NETCore.App",
+      "version": "3.1.0"
+    }
+  }
+}
\ No newline at end of file

STMPServer/STMPServer/obj/Debug/netcoreapp3.1/.NETCoreApp,Version=v3.1.AssemblyAttributes.cs

+// <autogenerated />
+using System;
+using System.Reflection;
+[assembly: global::System.Runtime.Versioning.TargetFrameworkAttribute(".NETCoreApp,Version=v3.1", FrameworkDisplayName = "")]

STMPServer/STMPServer/obj/Debug/netcoreapp3.1/STMPServer.AssemblyInfo.cs

+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//     Runtime Version:4.0.30319.42000
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Reflection;
+
+[assembly: System.Reflection.AssemblyCompanyAttribute("STMPServer")]
+[assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
+[assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0")]
+[assembly: System.Reflection.AssemblyProductAttribute("STMPServer")]
+[assembly: System.Reflection.AssemblyTitleAttribute("STMPServer")]
+[assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]
+
+// Generated by the MSBuild WriteCodeFragment class.
+

STMPServer/STMPServer/obj/Debug/netcoreapp3.1/STMPServer.AssemblyInfoInputs.cache

+288f5e67a3f23e091d34108d491ff5e0fbb95d09

STMPServer/STMPServer/obj/Debug/netcoreapp3.1/STMPServer.csproj.CoreCompileInputs.cache

+1f9858c49b57c0e519074dd288db3e15bdd662aa

STMPServer/STMPServer/obj/Debug/netcoreapp3.1/STMPServer.csproj.FileListAbsolute.txt

+E:\Kurssit\ties323\STMPServer\STMPServer\bin\Debug\netcoreapp3.1\STMPServer.exe
+E:\Kurssit\ties323\STMPServer\STMPServer\bin\Debug\netcoreapp3.1\STMPServer.deps.json
+E:\Kurssit\ties323\STMPServer\STMPServer\bin\Debug\netcoreapp3.1\STMPServer.runtimeconfig.json
+E:\Kurssit\ties323\STMPServer\STMPServer\bin\Debug\netcoreapp3.1\STMPServer.runtimeconfig.dev.json
+E:\Kurssit\ties323\STMPServer\STMPServer\bin\Debug\netcoreapp3.1\STMPServer.dll
+E:\Kurssit\ties323\STMPServer\STMPServer\bin\Debug\netcoreapp3.1\STMPServer.pdb
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.csprojAssemblyReference.cache
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.AssemblyInfoInputs.cache
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.AssemblyInfo.cs
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.csproj.CoreCompileInputs.cache
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.dll
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.pdb
+E:\Kurssit\ties323\STMPServer\STMPServer\obj\Debug\netcoreapp3.1\STMPServer.genruntimeconfig.cache

STMPServer/STMPServer/obj/Debug/netcoreapp3.1/STMPServer.genruntimeconfig.cache

+a2240db99a593c701e15ec395af3a989692b6803