mirror of
https://github.com/esiur/esiur-dotnet.git
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368 lines
13 KiB
C#
368 lines
13 KiB
C#
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/********************************************************************************\
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* Uruky Project *
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* *
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* Copyright (C) 2006 Ahmed Zamil - ahmed@dijlh.com *
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* http://www.dijlh.com *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy *
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* of this software and associated documentation files (the "Software"), to deal *
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* in the Software without restriction, including without limitation the rights *
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all *
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* copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, *
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE *
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* SOFTWARE. *
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* *
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* File: Packet.cs *
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* Description: Ethernet/ARP/IPv4/TCP/UDP Packet Decoding & Encoding Class *
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* Compatibility: .Net Framework 2.0 / Mono 1.1.8 *
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* *
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\********************************************************************************/
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using System;
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using System.Text;
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using Esiur.Misc;
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using Esiur.Net.DataLink;
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using System.Net.NetworkInformation;
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using Esiur.Data;
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namespace Esiur.Net.Packets;
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internal static class Functions
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{
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public static void AddData(ref byte[] dest, byte[] src)
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{
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int I = 0;
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if (src == null)
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{
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return;
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}
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if (dest != null)
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{
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I = dest.Length;
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Array.Resize(ref dest, dest.Length + src.Length);
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//dest = (byte[])Resize(dest, dest.Length + src.Length);
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}
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else
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{
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dest = new byte[src.Length];
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}
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Array.Copy(src, 0, dest, I, src.Length);
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}
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/*
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public static Array Resize(Array array, int newSize)
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{
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Type myType = Type.GetType(array.GetType().FullName.TrimEnd('[', ']'));
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Array nA = Array.CreateInstance(myType, newSize);
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Array.Copy(array, nA, (newSize > array.Length ? array.Length : newSize));
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return nA;
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} */
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//Computes the checksum used in IP, ARP..., ie the
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// "The 16 bit one's complement of the one 's complement sum
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//of all 16 bit words" as seen in RFCs
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// Returns a 4 characters hex string
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// data's lenght must be multiple of 4, else zero padding
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public static ushort IP_CRC16(byte[] data)
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{
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ulong Sum = 0;
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bool Padding = false;
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/// * Padding if needed
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if (data.Length % 2 != 0)
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{
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Array.Resize(ref data, data.Length + 1);
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//data = (byte[])Resize(data, data.Length + 1);
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Padding = true;
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}
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int count = data.Length;
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///* add 16-bit words */
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while (count > 0) //1)
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{
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///* this is the inner loop */
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Sum += GetInteger(data[count - 2], data[count - 1]);
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///* Fold 32-bit sum to 16-bit */
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while (Sum >> 16 != 0)
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{
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Sum = (Sum & 0XFFFF) + (Sum >> 16);
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}
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count -= 2;
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}
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/// * reverse padding
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if (Padding)
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{
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Array.Resize(ref data, data.Length - 1);
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//data = (byte[])Resize(data, data.Length - 1);
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}
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///* Return one's compliment of final sum.
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//return (ushort)(ushort.MaxValue - (ushort)Sum);
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return (ushort)(~Sum);
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}
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public static ushort GetInteger(byte B1, byte B2)
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{
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return BitConverter.ToUInt16(new byte[] { B2, B1 }, 0);
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//return System.Convert.ToUInt16("&h" + GetHex(B1) + GetHex(B2));
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}
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public static uint GetLong(byte B1, byte B2, byte B3, byte B4)
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{
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return BitConverter.ToUInt32(new byte[] { B4, B3, B2, B1 }, 0);
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//return System.Convert.ToUInt32("&h" + GetHex(B1) + GetHex(B2) + GetHex(B3) + GetHex(B4));
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}
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public static string GetHex(byte B)
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{
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return (((B < 15) ? 0 + System.Convert.ToString(B, 16).ToUpper() : System.Convert.ToString(B, 16).ToUpper()));
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}
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public static bool GetBit(uint B, byte Pos)
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{
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//return BitConverter.ToBoolean(BitConverter.GetBytes(B), Pos + 1);
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return (B & (uint)(Math.Pow(2, (Pos - 1)))) == (Math.Pow(2, (Pos - 1)));
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}
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public static ushort RemoveBit(ushort I, byte Pos)
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{
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return (ushort)RemoveBit((uint)I, Pos);
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}
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public static uint RemoveBit(uint I, byte Pos)
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{
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if (GetBit(I, Pos))
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{
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return I - (uint)(Math.Pow(2, (Pos - 1)));
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}
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else
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{
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return I;
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}
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}
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public static void SplitInteger(ushort I, ref byte BLeft, ref byte BRight)
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{
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byte[] b = BitConverter.GetBytes(I);
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BLeft = b[1];
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BRight = b[0];
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//BLeft = I >> 8;
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//BRight = (I << 8) >> 8;
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}
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public static void SplitLong(uint I, ref byte BLeft, ref byte BLeftMiddle, ref byte BRightMiddle, ref byte BRight)
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{
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byte[] b = BitConverter.GetBytes(I);
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BLeft = b[3];
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BLeftMiddle = b[2];
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BRightMiddle = b[1];
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BRight = b[0];
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//BLeft = I >> 24;
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//BLeftMiddle = (I << 8) >> 24;
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//BRightMiddle = (I << 16) >> 24;
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//BRight = (I << 24) >> 24;
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}
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}
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public class PosixTime
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{
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ulong seconds;
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ulong microseconds;
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PosixTime(ulong Seconds, ulong Microseconds)
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{
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seconds = Seconds;
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microseconds = Microseconds;
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}
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public override string ToString()
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{
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return seconds + "." + microseconds;
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}
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}
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public class Packet
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{
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//public EtherServer2.EthernetSource Source;
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public PacketSource Source;
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public DateTime Timestamp;
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public enum PPPType : ushort
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{
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IP = 0x0021, // Internet Protocol version 4 [RFC1332]
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SDTP = 0x0049, // Serial Data Transport Protocol (PPP-SDTP) [RFC1963]
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IPv6HeaderCompression = 0x004f, // IPv6 Header Compression
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IPv6 = 0x0057, // Internet Protocol version 6 [RFC5072]
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W8021dHelloPacket = 0x0201, // 802.1d Hello Packets [RFC3518]
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IPv6ControlProtocol = 0x8057, // IPv6 Control Protocol [RFC5072]
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}
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public enum ProtocolType : ushort
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{
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IP = 0x800, // IPv4
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ARP = 0x806, // Address Resolution Protocol
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IPv6 = 0x86DD, // IPv6
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FrameRelayARP = 0x0808, // Frame Relay ARP [RFC1701]
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VINESLoopback = 0x0BAE, // VINES Loopback [RFC1701]
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VINESEcho = 0x0BAF, // VINES ECHO [RFC1701]
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TransEtherBridging = 0x6558, // TransEther Bridging [RFC1701]
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RawFrameRelay = 0x6559, // Raw Frame Relay [RFC1701]
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IEE8021QVLAN = 0x8100, // IEEE 802.1Q VLAN-tagged frames (initially Wellfleet)
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SNMP = 0x814C, // SNMP [JKR1]
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TCPIP_Compression = 0x876B, // TCP/IP Compression [RFC1144]
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IPAutonomousSystems = 0x876C, // IP Autonomous Systems [RFC1701]
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SecureData = 0x876D, // Secure Data [RFC1701]
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PPP = 0x880B, // PPP [IANA]
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MPLS = 0x8847, // MPLS [RFC5332]
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MPLS_UpstreamAssignedLabel = 0x8848, // MPLS with upstream-assigned label [RFC5332]
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PPPoEDiscoveryStage = 0x8863, // PPPoE Discovery Stage [RFC2516]
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PPPoESessionStage = 0x8864, // PPPoE Session Stage [RFC2516]
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}
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/*
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public static void GetPacketMACAddresses(Packet packet, out byte[] srcMAC, out byte[] dstMAC)
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{
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// get the node address
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Packet root = packet.RootPacket;
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if (root is TZSPPacket)
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{
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TZSPPacket tp = (TZSPPacket)root;
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if (tp.Protocol == TZSPPacket.TZSPEncapsulatedProtocol.Ethernet)
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{
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EthernetPacket ep = (EthernetPacket)tp.SubPacket;
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srcMAC = ep.SourceMAC;
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dstMAC = ep.DestinationMAC;
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}
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else if (tp.Protocol == TZSPPacket.TZSPEncapsulatedProtocol.IEEE802_11)
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{
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W802_11Packet wp = (W802_11Packet)tp.SubPacket;
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srcMAC = wp.SA;
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dstMAC = wp.DA;
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}
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else
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{
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srcMAC = null;
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dstMAC = null;
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}
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}
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else if (root is EthernetPacket)
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{
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EthernetPacket ep = (EthernetPacket)root;
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srcMAC = ep.SourceMAC;
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dstMAC = ep.DestinationMAC;
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}
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else if (root is W802_11Packet)
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{
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W802_11Packet wp = (W802_11Packet)root;
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srcMAC = wp.SA;
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dstMAC = wp.DA;
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}
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else
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{
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srcMAC = null;
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dstMAC = null;
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}
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}
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public static void GetPacketAddresses(Packet packet, ref string srcMAC, ref string dstMAC, ref string srcIP, ref string dstIP)
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{
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if (packet is TCPv4Packet)
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{
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if (packet.ParentPacket is IPv4Packet)
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{
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IPv4Packet ip = (IPv4Packet)packet.ParentPacket;
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srcIP = ip.SourceIP.ToString();
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dstIP = ip.DestinationIP.ToString();
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}
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}
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// get the node address
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Packet root = packet.RootPacket;
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if (root is TZSPPacket)
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{
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TZSPPacket tp = (TZSPPacket)root;
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if (tp.Protocol == TZSPPacket.TZSPEncapsulatedProtocol.Ethernet)
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{
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EthernetPacket ep = (EthernetPacket)tp.SubPacket;
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srcMAC = DC.GetPhysicalAddress(ep.SourceMAC, 0).ToString();
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dstMAC = DC.GetPhysicalAddress(ep.DestinationMAC, 0).ToString();
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}
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else if (tp.Protocol == TZSPPacket.TZSPEncapsulatedProtocol.IEEE802_11)
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{
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W802_11Packet wp = (W802_11Packet)tp.SubPacket;
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srcMAC = DC.GetPhysicalAddress(wp.SA, 0).ToString();
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dstMAC = DC.GetPhysicalAddress(wp.DA, 0).ToString();
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}
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}
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else if (root is EthernetPacket)
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{
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EthernetPacket ep = (EthernetPacket)root;
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srcMAC = DC.GetPhysicalAddress(ep.SourceMAC, 0).ToString();
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dstMAC = DC.GetPhysicalAddress(ep.DestinationMAC, 0).ToString();
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}
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else if (root is W802_11Packet)
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{
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W802_11Packet wp = (W802_11Packet)root;
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srcMAC = DC.GetPhysicalAddress(wp.SA, 0).ToString();
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dstMAC = DC.GetPhysicalAddress(wp.DA, 0).ToString();
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}
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}
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*/
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//PosixTime Timeval;
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public byte[] Header;
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public byte[] Preamble;
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//public byte[] Payload;
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public byte[] Data;
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public Packet SubPacket;
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public Packet ParentPacket;
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public virtual long Parse(byte[] data, uint offset, uint ends) { return 0; }
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public virtual bool Compose() { return false; }
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public Packet RootPacket
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{
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get
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{
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Packet root = this;
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while (root.ParentPacket != null)
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root = root.ParentPacket;
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return root;
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}
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}
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public Packet LeafPacket
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{
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get
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{
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Packet leaf = this;
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while (leaf.SubPacket != null)
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leaf = leaf.SubPacket;
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return leaf;
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}
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}
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}
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/************************************ EOF *************************************/
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