public static void Set(
ref TCPHeader header,
IPv4Address sourceAddress,
ushort sourcePort,
IPv4Address desAddress,
ushort desPort,
Span <byte> headerAndData)
{
header._SourcePort = Meth.AsBigEndian(sourcePort);
header._DesPort = Meth.AsBigEndian(desPort);
var ph = new PseudoHeader(
sourceAddress,
desAddress,
Protocol.TCP,
(ushort)headerAndData.Length);
header._Checksum = 0;
header._Checksum = Meth.AsBigEndian(Meth.CalculationHeaderChecksum(ph, headerAndData));
}
public static void Set(
ref TCPHeader header,
IPv4Address sourceAddress,
ushort sourcePort,
IPv4Address desAddress,
ushort desPort,
TCPFlag tcpFlag,
ushort windowSize,
uint sequenceNumber,
uint acknowledgmentNumber,
Span <byte> headerAndData)
{
header = new TCPHeader();
header._SourcePort = Meth.AsBigEndian(sourcePort);
header._DesPort = Meth.AsBigEndian(desPort);
header._SequenceNumber = Meth.AsBigEndian(sequenceNumber);
header._AcknowledgmentNumber = Meth.AsBigEndian(acknowledgmentNumber);
header._WindowSize = Meth.AsBigEndian(windowSize);
header._TCPHeader12_14._Byte_0 = (byte)(5 << 4);
header._TCPHeader12_14._Byte_1 = (byte)tcpFlag;
var ph = new PseudoHeader(
sourceAddress,
desAddress,
Protocol.TCP,
(ushort)headerAndData.Length);
header._Checksum = Meth.AsBigEndian(Meth.CalculationHeaderChecksum(ph, headerAndData));
}