public override bool VerifyCheckSum(byte[] srcIP, byte[] dstIP)
{
int pHeaderLen = (12) + HeaderLength + data.Length;
if ((pHeaderLen & 1) != 0)
{
pHeaderLen += 1;
}
byte[] headerSegment = new byte[pHeaderLen];
int counter = 0;
NetLib.WriteByteArray(headerSegment, ref counter, srcIP);
NetLib.WriteByteArray(headerSegment, ref counter, dstIP);
counter += 1;//[8] = 0
NetLib.WriteByte08(headerSegment, ref counter, Protocol);
NetLib.WriteUInt16(headerSegment, ref counter, Length);
//Pseudo Header added
//Rest of data is normal Header+data (with zerored checksum feild)
NetLib.WriteByteArray(headerSegment, ref counter, GetBytes());
UInt16 CsumCal = IPPacket.InternetChecksum(headerSegment);
//Error.WriteLine("UDP Checksum Good = " + (CsumCal == 0));
return(CsumCal == 0);
}
public override void CalculateCheckSum(byte[] srcIP, byte[] dstIP)
{
int pHeaderLen = (12) + HeaderLength + data.Length;
if ((pHeaderLen & 1) != 0)
{
pHeaderLen += 1;
}
byte[] headerSegment = new byte[pHeaderLen];
int counter = 0;
NetLib.WriteByteArray(headerSegment, ref counter, srcIP);
NetLib.WriteByteArray(headerSegment, ref counter, dstIP);
counter += 1;//[8] = 0
NetLib.WriteByte08(headerSegment, ref counter, Protocol);
NetLib.WriteUInt16(headerSegment, ref counter, Length);
//Pseudo Header added
//Rest of data is normal Header+data (with zerored checksum feild)
//Null Checksum
checksum = 0;
NetLib.WriteByteArray(headerSegment, ref counter, GetBytes());
checksum = IPPacket.InternetChecksum(headerSegment); //For performance, we can set this to = zero
}
public override bool VerifyCheckSum(byte[] srcIP, byte[] dstIP)
{
UInt16 TCPLength = (UInt16)(Length);
int pHeaderLen = (12 + TCPLength);
if ((pHeaderLen & 1) != 0)
{
//Error.WriteLine("OddSizedPacket");
pHeaderLen += 1;
}
byte[] headerSegment = new byte[pHeaderLen];
int counter = 0;
NetLib.WriteByteArray(headerSegment, ref counter, srcIP);
NetLib.WriteByteArray(headerSegment, ref counter, dstIP);
counter += 1;//[8] = 0
NetLib.WriteByte08(headerSegment, ref counter, Protocol);
NetLib.WriteUInt16(headerSegment, ref counter, (UInt16)TCPLength);
//Pseudo Header added
//Rest of data is normal neader+data
NetLib.WriteByteArray(headerSegment, ref counter, GetBytes());
UInt16 CsumCal = IPPacket.InternetChecksum(headerSegment);
//Error.WriteLine("Checksum Good = " + (CsumCal == 0));
return(CsumCal == 0);
}
public override void CalculateCheckSum(byte[] srcIP, byte[] dstIP)
{
Int16 TCPLength = (Int16)(headerLength + data.Length);
int pHeaderLen = (12 + TCPLength);
if ((pHeaderLen & 1) != 0)
{
//Error.WriteLine("OddSizedPacket");
pHeaderLen += 1;
}
byte[] headerSegment = new byte[pHeaderLen];
int counter = 0;
NetLib.WriteByteArray(headerSegment, ref counter, srcIP);
NetLib.WriteByteArray(headerSegment, ref counter, dstIP);
counter += 1;//[8] = 0
NetLib.WriteByte08(headerSegment, ref counter, Protocol);
NetLib.WriteUInt16(headerSegment, ref counter, (UInt16)TCPLength);
//Pseudo Header added
//Rest of data is normal Header+data (with zerored checksum feild)
//Null Checksum
checksum = 0;
NetLib.WriteByteArray(headerSegment, ref counter, GetBytes());
checksum = IPPacket.InternetChecksum(headerSegment);
}
public override void CalculateCheckSum(byte[] srcIP, byte[] dstIP)
{
int pHeaderLen = ((Length));
if ((pHeaderLen & 1) != 0)
{
//Error.WriteLine("OddSizedPacket");
pHeaderLen += 1;
}
byte[] headerSegment = new byte[pHeaderLen];
int counter = 0;
checksum = 0;
NetLib.WriteByteArray(headerSegment, ref counter, GetBytes());
checksum = IPPacket.InternetChecksum(headerSegment);
}
public override bool VerifyCheckSum(byte[] srcIP, byte[] dstIP)
{
int pHeaderLen = ((Length));
if ((pHeaderLen & 1) != 0)
{
//Error.WriteLine("OddSizedPacket");
pHeaderLen += 1;
}
byte[] headerSegment = new byte[pHeaderLen];
int counter = 0;
NetLib.WriteByteArray(headerSegment, ref counter, GetBytes());
UInt16 CsumCal = IPPacket.InternetChecksum(headerSegment);
//Error.WriteLine("IGMP Checksum Good = " + (CsumCal == 0));
return(CsumCal == 0);
}
public override bool Recv(ref NetPacket pkt)
{
if (dhcpActive)
{
IPPayload retDHCP = dhcp.Recv();
if (retDHCP != null)
{
IPPacket retIP = new IPPacket(retDHCP);
retIP.DestinationIP = new byte[] { 255, 255, 255, 255 };
retIP.SourceIP = DefaultDHCPConfig.DHCP_IP;
EthernetFrame ef = new EthernetFrame(retIP);
ef.SourceMAC = virturalDHCPMAC;
ef.DestinationMAC = ps2MAC;
ef.Protocol = (UInt16)EtherFrameType.IPv4;
pkt = ef.CreatePacket();
return true;
}
}
return false;
}
public override bool Send(IPPayload payload)
{
ICMP icmp = (ICMP)payload;
switch (icmp.Type)
{
case 8: //Echo
//Code == zero
Log_Verb("Send Ping");
lock (sentry)
{
open += 1;
}
PingData pd;
pd.Data = icmp.Data;
pd.HeaderData = icmp.HeaderData;
Ping nPing = new Ping();
nPing.PingCompleted += PingCompleate;
lock (sentry)
{
pings.Add(nPing);
}
nPing.SendAsync(new IPAddress(DestIP), pd);
System.Threading.Thread.Sleep(1); //Hack Fix
break;
case 3: //
switch (icmp.Code)
{
case 3:
Log_Error("Recived Packet Rejected, Port Closed");
IPPacket retPkt = new IPPacket(icmp);
byte[] srvIP = retPkt.SourceIP;
byte prot = retPkt.Protocol;
UInt16 srvPort = 0;
UInt16 ps2Port = 0;
switch (prot)
{
case (byte)IPType.TCP:
TCP tcp = (TCP)retPkt.Payload;
srvPort = tcp.SourcePort;
ps2Port = tcp.DestinationPort;
break;
case (byte)IPType.UDP:
UDP udp = (UDP)retPkt.Payload;
srvPort = udp.SourcePort;
ps2Port = udp.DestinationPort;
break;
}
ConnectionKey Key = new ConnectionKey();
Key.IP0 = srvIP[0]; Key.IP1 = srvIP[1]; Key.IP2 = srvIP[2]; Key.IP3 = srvIP[3];
Key.Protocol = prot;
Key.PS2Port = ps2Port;
Key.SRVPort = srvPort;
Session s;
connections.TryGetValue(Key, out s);
if (s != null)
{
s.Reset();
Log_Info("Reset Rejected Connection");
}
else
{
Log_Error("Failed To Reset Rejected Connection");
}
break;
default:
throw new NotImplementedException("Unsupported ICMP Code For Destination Unreachable" + icmp.Code);
}
break;
default:
throw new NotImplementedException("Unsupported ICMP Type" + icmp.Type);
}
return true;
}