// /** // * File: RadiusAttribute.cs // * Author: haraldwolff // * // * This file and it's content is copyrighted by the Author and / or copyright holder. // * Any use wihtout proper permission is illegal and may lead to legal actions. // * // * // **/ using System; using System.IO; using ln.types; using System.Collections.Generic; using System.Text; using ln.types.net; namespace ln.radius { public delegate RadiusAttribute RadiusAttributeFactory(byte attributeType); public class RadiusAttribute { public byte Type { get; private set; } public string Name => AttributeName(Type); public virtual byte[] Bytes { get; set; } public RadiusAttribute(byte type) { Type = type; } public byte[] ToBytes() { byte[] vBytes = Bytes; byte[] bytes = new byte[vBytes.Length + 2]; bytes[0] = Type; bytes[1] = (byte)bytes.Length; Array.Copy(vBytes, 0, bytes, 2, vBytes.Length); return bytes; } public static RadiusAttribute Read(Stream stream) { byte atype = (byte)stream.ReadByte(); byte alength = (byte)stream.ReadByte(); byte[] abytes = stream.ReadBytes(alength - 2); RadiusAttribute radiusAttribute = RadiusAttribute.Create(atype); radiusAttribute.Bytes = abytes; return radiusAttribute; } public override string ToString() { foreach (byte by in Bytes) { if (by < 0x20) return String.Format("[RadiusAttribute Type={0} {1}]", Name, BitConverter.ToString(Bytes)); } return String.Format("[RadiusAttribute Type={0} {1}]", Name, Encoding.ASCII.GetString(Bytes)); } static Dictionary attributeNames = new Dictionary(); static Dictionary attributeFactories = new Dictionary(); public static RadiusAttribute Create(byte attributeType) { if (attributeFactories.ContainsKey(attributeType)) return attributeFactories[attributeType](attributeType); return new RadiusAttribute(attributeType); } public static String AttributeName(byte type) { if (attributeNames.ContainsKey(type)) return attributeNames[type]; return type.ToString(); } public static void RegisterAttributeFactory(byte attributeType, string attributeName, RadiusAttributeFactory factory) { attributeFactories.Add(attributeType, factory); attributeNames.Add(attributeType, attributeName); } static RadiusAttribute() { RegisterAttributeFactory(0x01, "User-Name", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x02, "User-Password", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x03, "CHAP-Password", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x04, "NAS-IP-Address", (type) => new IPv4Attribute(type)); RegisterAttributeFactory(0x05, "NAS-Port", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x06, "Service-Type", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x07, "Framed-Protocol", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x08, "Framed-IP-Address", (type) => new IPv4Attribute(type)); RegisterAttributeFactory(0x09, "Framed-IP-Netmask", (type) => new IPv4Attribute(type)); RegisterAttributeFactory(0x0A, "Framed-Routing", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x0B, "Filter-Id", (type) => new TextAttribute(type)); RegisterAttributeFactory(0x0C, "Framed-MTU", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x0D, "Framed-Compression", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x0E, "Login-IP-Host", (type) => new IPv4Attribute(type)); RegisterAttributeFactory(0x0F, "Login-Service", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x10, "Login-TCP-Port", (type) => new IntAttribute(type)); //RegisterAttributeFactory(0x11, "", (type) => new RadiusAttribute(type)); // Reserved RegisterAttributeFactory(0x12, "Reply-Message", (type) => new TextAttribute(type)); RegisterAttributeFactory(0x13, "Callback-Number", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x14, "Callback-Id", (type) => new RadiusAttribute(type)); //RegisterAttributeFactory(0x15, "", (type) => new RadiusAttribute(type)); // Reserved RegisterAttributeFactory(0x16, "Framed-Route", (type) => new TextAttribute(type)); RegisterAttributeFactory(0x17, "Framed-IPX-Network", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x18, "State", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x19, "Class", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x1A, "Vendor-Specific", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x1B, "Session-Timeout", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x1C, "Idle-Timeout", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x1D, "Termination-Action", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x1E, "Called-Station-Id", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x1F, "Calling-Station-Id", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x20, "NAS-Identifier", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x21, "Proxy-State", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x22, "Login-LAT-Service", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x23, "Login-LAT-Node", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x24, "Login-LAT-Group", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x25, "Framed-AppleTalk-Link", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x26, "Framed-AppleTalk-Network", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x27, "Framed-AppleTalk-Zone", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x3C, "CHAP-Challenge", (type) => new RadiusAttribute(type)); RegisterAttributeFactory(0x3D, "NAS-Port-Type", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x3E, "Port-Limit", (type) => new IntAttribute(type)); RegisterAttributeFactory(0x3F, "Login-LAT-Port", (type) => new RadiusAttribute(type)); } class TextAttribute : RadiusAttribute { public String Text { get; set; } public override byte[] Bytes { get => Encoding.UTF8.GetBytes(Text); set => Text = Encoding.UTF8.GetString(value); } public TextAttribute(byte type) : base(type) { } public override string ToString() { return string.Format("[RadiusAttribute Type={0} {1}]", Name, Text); } } class IPv4Attribute : RadiusAttribute { public IPv4 IP { get; set; } public override byte[] Bytes { get => IP.IPBytes; set => IP = new IPv4(value); } public IPv4Attribute(byte type) : base(type) { } public override string ToString() { return string.Format("[RadiusAttribute Type={0} {1}]", Name, IP.ToString()); } } class IntAttribute : RadiusAttribute { public UInt32 UInt32 { get; set; } public override byte[] Bytes { get => UInt32.GetBytes(true); set => UInt32 = BitConverter.ToUInt32(value.BigEndian(), 0); } public IntAttribute(byte type) : base(type) { } public override string ToString() { return string.Format("[RadiusAttribute Type={0} {1}]", Name, UInt32); } } class TimeAttribute : RadiusAttribute { DateTimeOffset DateTimeOffset { get; set; } public override byte[] Bytes { get => ((uint)DateTimeOffset.ToUnixTimeSeconds()).GetBytes(true); set => DateTimeOffset = DateTimeOffset.FromUnixTimeSeconds(BitConverter.ToUInt32(value.BigEndian(),0)); } public TimeAttribute(byte type) : base(type) { } public override string ToString() { return string.Format("[RadiusAttribute Type={0} {1}]", Name, DateTimeOffset); } } } }