dan/Cosmos
1
0
Fork 0
mirror of https://github.com/danbulant/Cosmos synced 2026-05-22 05:48:37 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

IPv4 - Endian changes

Browse source
This commit is contained in:
Scalpel_cp 2008-05-02 17:24:33 +00:00
parent 2e8677c2b2
commit 93059552f8
2 changed files with 39 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

39
source/Cosmos/Cosmos.Hardware/Network/TCPIPModel/NetworkLayer/IPv4/IPv4Packet.cs
View file

@ -135,6 +135,10 @@ namespace Cosmos.Hardware.Network.TCPIPModel.NetworkLayer.IPv4
private byte[] GetHeaderBytes()
{
//TODO - the following things don't work (because of endianism)
// Identification + Flags + Fragment Offset
// Header Checksum
List<byte> bytes = new List<byte>();
List<UInt32> fields = new List<UInt32>();
@ -144,12 +148,14 @@ namespace Cosmos.Hardware.Network.TCPIPModel.NetworkLayer.IPv4
//field1 = ConvertToBigEndian(field1);
fields.Add(field1);
UInt32 field2 = (UInt32)((this.Identification << 8) | (((byte)(this.FragmentFlags)) << 21) | (byte)(this.FragmentOffset << 24)); //TODO: FragmentOffset should be 13 bits.
//UInt32 field2 = (UInt32)((this.Identification << 8) | (((byte)(this.FragmentFlags)) << 21) | (byte)(this.FragmentOffset << 24)); //TODO: FragmentOffset should be 13 bits.
//fields.Add(ConvertToBigEndian(field2));
fields.Add(field2);
UInt32 field2 = (UInt32)((this.Identification << 8) | ((byte)(this.FragmentFlags)) << 21 | (this.FragmentOffset << 24));
//field2 = (UInt32)System.Net.IPAddress.HostToNetworkOrder(field2);
fields.Add((UInt32)HostToNetworkOrder((int)field2));
UInt32 field3 = (UInt32)((this.TimeToLive << 0) | (((byte)(this.Protocol)) << 8) | (this.HeaderChecksum << 24));
//fields.Add(ConvertToBigEndian(field3));
UInt32 field3 = (UInt32)((this.TimeToLive << 0) | (((byte)(this.Protocol)) << 8) | (UInt16)(this.HeaderChecksum << 16));
//field3 = ConvertToBigEndian(field3);
fields.Add(field3);
//Split the 32-bit words into bytes
@ -352,6 +358,31 @@ namespace Cosmos.Hardware.Network.TCPIPModel.NetworkLayer.IPv4
return bin.FromBinary();
}
public short HostToNetworkOrder(short host)
{
throw new NotImplementedException();
}
private static int HostToNetworkOrder(int n)
{
string bin = n.ToBinary();
bin = bin.PadLeft(32, '0');
string first = bin.Substring(0, 8);
string second = bin.Substring(8, 8);
string third = bin.Substring(16, 8);
string fourth = bin.Substring(24, 8);
bin = fourth + third + second + first;
return (int)bin.FromBinary();
}
public long HostToNetworkOrder(long host)
{
throw new NotImplementedException();
}
#endregion
#region Enumerations

4
source/FrodeTest/Shell/Session.cs
View file

@ -30,6 +30,10 @@ namespace FrodeTest.Shell
{
Test.Ethernet2FrameTest.RunTest();
}
else if (command.Equals("ip"))
{
Test.IPv4Test.RunTest();
}
else if (command.Equals("load"))
{
var list = RTL8139.FindAll();