public static TcpOptions NextTcpOptions(this Random random)
{
int optionsLength = random.Next(TcpOptions.MaximumBytesLength) / 4 * 4;
List <TcpOption> options = new List <TcpOption>();
while (optionsLength > 0)
{
TcpOption option = random.NextTcpOption(optionsLength);
if (option.IsAppearsAtMostOnce &&
options.FindIndex(option.Equivalent) != -1)
{
continue;
}
options.Add(option);
optionsLength -= option.Length;
if (option.OptionType == TcpOptionType.EndOfOptionList)
{
break;
}
}
return(new TcpOptions(options));
}
private static bool HandleOptionCommonFields(XElement subfield, TcpOption option)
{
switch (subfield.Name())
{
case "tcp.option_kind":
subfield.AssertNoFields();
subfield.AssertShowDecimal((byte)option.OptionType);
return(true);
case "tcp.options.type":
subfield.AssertShowDecimal((byte)option.OptionType);
return(true);
case "tcp.option_len":
subfield.AssertNoFields();
subfield.AssertShowDecimal(option.Length);
return(true);
default:
return(false);
}
}
internal override bool EqualsData(TcpOption other)
{
return (other is TcpOptionPartialOrderConnectionPermitted);
}
internal void SendTcpSegment(UInt32 sourceIPAddress, UInt32 destinationIPAddress, UInt16 sourceIPPort, UInt16 destinationIPPort, UInt32 sequenceNumber, UInt32 acknowledgementNumber, UInt16 windowSize, bool sendAck, bool sendPsh, bool sendRst, bool sendSyn, bool sendFin, TcpOption[] tcpOptions, byte[] buffer, Int32 offset, Int32 count, Int64 timeoutInMachineTicks)
{
if (_isDisposed) return;
lock (_tcpHeaderBufferLockObject)
{
Int32 tcpHeaderLength = TCP_HEADER_MIN_LENGTH + (sendSyn ? 4 : 0);
// TCP basic header: 20 bytes
_tcpHeaderBuffer[0] = (byte)((sourceIPPort >> 8) & 0xFF);
_tcpHeaderBuffer[1] = (byte)(sourceIPPort & 0xFF);
_tcpHeaderBuffer[2] = (byte)((destinationIPPort >> 8) & 0xFF);
_tcpHeaderBuffer[3] = (byte)(destinationIPPort & 0xFF);
// sequence number
_tcpHeaderBuffer[4] = (byte)((sequenceNumber >> 24) & 0xFF);
_tcpHeaderBuffer[5] = (byte)((sequenceNumber >> 16) & 0xFF);
_tcpHeaderBuffer[6] = (byte)((sequenceNumber >> 8) & 0xFF);
_tcpHeaderBuffer[7] = (byte)(sequenceNumber & 0xFF);
// acknowledment number
if (sendAck)
{
_tcpHeaderBuffer[8] = (byte)((acknowledgementNumber >> 24) & 0xFF);
_tcpHeaderBuffer[9] = (byte)((acknowledgementNumber >> 16) & 0xFF);
_tcpHeaderBuffer[10] = (byte)((acknowledgementNumber >> 8) & 0xFF);
_tcpHeaderBuffer[11] = (byte)(acknowledgementNumber & 0xFF);
}
else
{
Array.Clear(_tcpHeaderBuffer, 8, 4);
}
// header length and flags
_tcpHeaderBuffer[12] = (byte)((tcpHeaderLength / 4) << 4);
// more flags
_tcpHeaderBuffer[13] = (byte)(
(sendFin ? 1 << 0 : 0) |
(sendSyn ? 1 << 1 : 0) |
(sendRst ? 1 << 2 : 0) |
(sendPsh ? 1 << 3 : 0) |
(sendAck ? 1 << 4 : 0)
);
// window size (i.e. how much data we are willing to receive)
_tcpHeaderBuffer[14] = (byte)((windowSize >> 8) & 0xFF);
_tcpHeaderBuffer[15] = (byte)(windowSize & 0xFF);
// tcp checksum
Array.Clear(_tcpHeaderBuffer, 16, 2);
// urgent pointer
/* NOTE: bytes 18-19, never populated */
// TCP options: empty by default policy -- but zero-initialized under any circumstance
Array.Clear(_tcpHeaderBuffer, TCP_HEADER_MIN_LENGTH, TCP_HEADER_MAX_LENGTH - TCP_HEADER_MIN_LENGTH);
/* TCP options */
if (tcpOptions != null)
{
int headerPos = TCP_HEADER_MIN_LENGTH;
for (int iOption = 0; iOption < tcpOptions.Length; iOption++)
{
_tcpHeaderBuffer[headerPos++] = tcpOptions[iOption].Kind;
switch (tcpOptions[iOption].Kind)
{
case 0: /* EOL = End of Option List */
case 1: /* NOP = No OPeration; used for padding */
break;
default:
{
if (tcpOptions[iOption].Data != null)
{
_tcpHeaderBuffer[headerPos++] = (byte)(tcpOptions[iOption].Data.Length + 2);
Array.Copy(tcpOptions[iOption].Data, 0, _tcpHeaderBuffer, headerPos, tcpOptions[iOption].Data.Length);
headerPos += tcpOptions[iOption].Data.Length;
}
else
{
_tcpHeaderBuffer[headerPos++] = 2; /* only 2 bytes--the kind and the length--with no data */
}
}
break;
}
}
}
UInt16 checksum;
lock (_tcpPseudoHeaderBufferLockObject)
{
// create temporary pseudo header
_tcpPseudoHeaderBuffer[0] = (byte)((sourceIPAddress >> 24) & 0xFF);
_tcpPseudoHeaderBuffer[1] = (byte)((sourceIPAddress >> 16) & 0xFF);
_tcpPseudoHeaderBuffer[2] = (byte)((sourceIPAddress >> 8) & 0xFF);
_tcpPseudoHeaderBuffer[3] = (byte)(sourceIPAddress & 0xFF);
_tcpPseudoHeaderBuffer[4] = (byte)((destinationIPAddress >> 24) & 0xFF);
_tcpPseudoHeaderBuffer[5] = (byte)((destinationIPAddress >> 16) & 0xFF);
_tcpPseudoHeaderBuffer[6] = (byte)((destinationIPAddress >> 8) & 0xFF);
_tcpPseudoHeaderBuffer[7] = (byte)(destinationIPAddress & 0xFF);
_tcpPseudoHeaderBuffer[8] = 0; // ZERO
_tcpPseudoHeaderBuffer[9] = (byte)IPv4Layer.ProtocolType.Tcp; // Protocol Number
UInt16 tcpLength = (UInt16)(tcpHeaderLength + count);
_tcpPseudoHeaderBuffer[10] = (byte)((tcpLength >> 8) & 0xFF);
_tcpPseudoHeaderBuffer[11] = (byte)(tcpLength & 0xFF);
// calculate checksum over entire pseudo-header, UDP header and data
_checksumBufferArray[0] = _tcpPseudoHeaderBuffer;
_checksumOffsetArray[0] = 0;
_checksumCountArray[0] = TCP_PSEUDO_HEADER_LENGTH;
_checksumBufferArray[1] = _tcpHeaderBuffer;
_checksumOffsetArray[1] = 0;
_checksumCountArray[1] = tcpHeaderLength;
_checksumBufferArray[2] = buffer;
_checksumOffsetArray[2] = offset;
_checksumCountArray[2] = count;
checksum = Utility.CalculateInternetChecksum(_checksumBufferArray, _checksumOffsetArray, _checksumCountArray); /* NOTE: this function will append a pad byte if necessary for 16-bit alignment before calculation */
}
// insert checksujm into UDP header
_tcpHeaderBuffer[16] = (byte)((checksum >> 8) & 0xFF);
_tcpHeaderBuffer[17] = (byte)(checksum & 0xFF);
// queue up our buffer arrays
_bufferArray[0] = _tcpHeaderBuffer;
_indexArray[0] = 0;
_countArray[0] = tcpHeaderLength;
_bufferArray[1] = buffer;
_indexArray[1] = offset;
_countArray[1] = count;
/* TODO: deal with our flags and timeout_ms; we shouldn't just be sending while blocking -- and ignoring the flags */
_ipv4Layer.Send((byte)IPv4Layer.ProtocolType.Tcp, sourceIPAddress, destinationIPAddress, _bufferArray, _indexArray, _countArray, timeoutInMachineTicks);
}
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionMd5Signature);
}
internal sealed override bool EqualsData(TcpOption other)
{
return(EqualsData(other as TcpOptionConnectionCountBase));
}
internal override bool EqualsData(TcpOption other)
{
return other is TcpOptionSimple;
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionAuthentication);
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionWindowScale);
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionEchoReply);
}
private static void CompareTcpOptions(XElement element, TcpOptions options)
{
int currentOptionIndex = 0;
foreach (var field in element.Fields())
{
if (field.Name() == "_ws.expert")
{
continue;
}
if (currentOptionIndex >= options.Count)
{
Assert.IsFalse(options.IsValid, "Options IsValid");
Assert.IsTrue(
field.Show().StartsWith("Unknown (0x09) ") || // Unknown in Wireshark but known (and invalid) in Pcap.Net.
field.Show().StartsWith("Unknown (0x0a) ") || // Unknown in Wireshark but known (and invalid) in Pcap.Net.
field.Show().StartsWith("Unknown (0x19) ") || // Unknown in Wireshark but known (and invalid) in Pcap.Net.
field.Show().StartsWith("Unknown (0x2d) ") || // Unknown in Wireshark and unknown and invalid in Pcap.Net.
field.Show().StartsWith("Unknown (0xa9) ") || // Unknown in Wireshark and unknown and invalid in Pcap.Net.
field.Show().StartsWith("Echo reply (with option length = ") ||
field.Show().Contains("bytes says option goes past end of options") ||
field.Show().Contains(") (with too-short option length = ") ||
field.Show().EndsWith(" (length byte past end of options)"),
"Options show: " + field.Show());
Assert.AreEqual(options.Count, currentOptionIndex, "Options Count");
return;
}
TcpOption option = options[currentOptionIndex];
switch (field.Name())
{
case "":
switch (option.OptionType)
{
case TcpOptionType.WindowScale:
TcpOptionWindowScale windowScale = (TcpOptionWindowScale)option;
byte scaleFactorLog = windowScale.ScaleFactorLog;
field.AssertShow(string.Format("Window scale: {0} (multiply by {1})", scaleFactorLog, (1L << (scaleFactorLog % 32))));
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
switch (subField.Name())
{
case "tcp.options.wscale.shift":
subField.AssertShowDecimal(windowScale.ScaleFactorLog);
break;
case "tcp.options.wscale.multiplier":
subField.AssertShowDecimal(1L << (windowScale.ScaleFactorLog % 32));
break;
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.SelectiveAcknowledgment:
var selectiveAcknowledgmentOption = (TcpOptionSelectiveAcknowledgment)option;
IEnumerable <TcpOptionSelectiveAcknowledgmentBlock> blocks = selectiveAcknowledgmentOption.Blocks;
field.AssertShow("SACK:" + (blocks.Count() == 0
? string.Empty
: ((TcpOptionSelectiveAcknowledgment)option).Blocks.SequenceToString(" ", " ")));
int blockIndex = 0;
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
case "tcp.options.sack":
subField.AssertShowDecimal(true);
break;
case "tcp.options.sack_le":
subField.AssertShowDecimal(selectiveAcknowledgmentOption.Blocks[blockIndex].LeftEdge);
break;
case "tcp.options.sack_re":
subField.AssertShowDecimal(selectiveAcknowledgmentOption.Blocks[blockIndex].RightEdge);
++blockIndex;
break;
case "tcp.options.sack.count":
subField.AssertShowDecimal(selectiveAcknowledgmentOption.Blocks.Count);
break;
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.Timestamp:
var timestampOption = (TcpOptionTimestamp)option;
field.AssertShow("Timestamps: TSval " + timestampOption.TimestampValue + ", TSecr " + timestampOption.TimestampEchoReply);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
case "tcp.options.timestamp.tsval":
subField.AssertShowDecimal(timestampOption.TimestampValue);
break;
case "tcp.options.timestamp.tsecr":
subField.AssertShowDecimal(timestampOption.TimestampEchoReply);
break;
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.ConnectionCount:
field.AssertShow("CC: " + ((TcpOptionConnectionCount)option).ConnectionCount);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.Echo:
field.AssertShow("Echo: " + ((TcpOptionEcho)option).Info);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.ConnectionCountNew:
field.AssertShow("CC.NEW: " + ((TcpOptionConnectionCountNew)option).ConnectionCount);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.EndOfOptionList:
field.AssertShow("End of Option List (EOL)");
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
switch (subField.Name())
{
default:
subField.AssertNoFields();
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.ConnectionCountEcho:
field.AssertShow("CC.ECHO: " + ((TcpOptionConnectionCountEcho)option).ConnectionCount);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
default:
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.Md5Signature:
field.AssertShow("TCP MD5 signature");
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
switch (subField.Name())
{
case "tcp.options.type":
subField.AssertShowDecimal((byte)TcpOptionType.Md5Signature);
break;
default:
subField.AssertNoFields();
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
}
break;
case TcpOptionType.NoOperation:
field.AssertShow("No-Operation (NOP)");
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
break;
case TcpOptionType.EchoReply:
field.AssertShow("Echo reply: " + ((TcpOptionEchoReply)option).Info);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
throw new InvalidOperationException("Invalid tcp option subfield " + subField.Name());
}
break;
case TcpOptionType.SelectiveAcknowledgmentPermitted:
field.AssertShow("SACK permitted");
field.AssertNoFields();
break;
case TcpOptionType.SelectiveNegativeAcknowledgements: // TODO: Support Selective Negative Acknowledgements.
Assert.IsTrue(field.Show().StartsWith("SACK permitted"));
field.AssertNoFields();
break;
case (TcpOptionType)20:
// TODO: Support 20.
field.AssertShow("SCPS capabilities" + (option.Length >= 4
? string.Empty
: " (with option length = " + option.Length + " bytes; should be >= 4)"));
break;
case (TcpOptionType)22:
field.AssertShow("SCPS record boundary (with option length = " + option.Length + " bytes; should be 2)");
// TODO: Support 22.
break;
case (TcpOptionType)23:
field.AssertShow("SCPS corruption experienced (with option length = " + option.Length + " bytes; should be 2)");
// TODO: Support 23.
break;
case (TcpOptionType)30:
// TODO: Support 30.
Assert.IsTrue(field.Show().StartsWith("Multipath TCP"));
break;
case (TcpOptionType)78:
field.AssertShow("Riverbed Transparency (with option length = " + option.Length + " bytes; should be 16)");
// TODO: Support 78 - Support Riverbed.
break;
case TcpOptionType.PartialOrderConnectionPermitted: // 9.
case TcpOptionType.PartialOrderServiceProfile: // 10.
case TcpOptionType.AlternateChecksumRequest: // 14.
case TcpOptionType.AlternateChecksumData: // 15.
case TcpOptionType.Mood: // 25.
case TcpOptionType.TcpAuthentication: // 29.
field.AssertShow(string.Format("Unknown (0x{0}) ({1} bytes)", ((byte)option.OptionType).ToString("x2"), option.Length));
field.AssertNoFields();
break;
default:
field.AssertNoFields();
field.AssertShow("Unknown (0x" + ((byte)option.OptionType).ToString("x") + ") (" + option.Length + " bytes)");
break;
}
++currentOptionIndex;
break;
case "tcp.options.mss":
Assert.AreEqual(TcpOptionType.MaximumSegmentSize, option.OptionType);
var maximumSegmentSize = (TcpOptionMaximumSegmentSize)option;
field.AssertShowname("Maximum segment size: " + maximumSegmentSize.MaximumSegmentSize + " bytes");
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
switch (subField.Name())
{
case "tcp.options.mss_val":
subField.AssertShowDecimal(maximumSegmentSize.MaximumSegmentSize);
break;
default:
throw new InvalidOperationException("Invalid tcp options subfield " + subField.Name());
}
}
++currentOptionIndex;
break;
case "tcp.options.mss_val":
field.AssertShowDecimal(((TcpOptionMaximumSegmentSize)option).MaximumSegmentSize);
field.AssertNoFields();
++currentOptionIndex;
break;
case "tcp.options.echo":
Assert.IsTrue(option is TcpOptionEchoReply || option is TcpOptionEcho);
field.AssertShowDecimal(1);
field.AssertNoFields();
break;
case "tcp.options.cc":
Assert.IsTrue(option is TcpOptionConnectionCountBase);
field.AssertShowDecimal(1);
field.AssertNoFields();
break;
case "tcp.options.scps.vector":
// TODO: Support 20.
Assert.AreEqual((TcpOptionType)20, option.OptionType);
// if (field.Show() == "0")
// ++currentOptionIndex;
++currentOptionIndex;
break;
case "tcp.options.scps":
// TODO: Support 20.
Assert.AreEqual((TcpOptionType)20, option.OptionType);
Assert.IsFalse(field.Fields().Any());
break;
case "tcp.options.snack": // TODO: Support Selective Negative Acknowledgements.
case "tcp.options.snack.offset":
case "tcp.options.snack.size":
Assert.AreEqual(TcpOptionType.SelectiveNegativeAcknowledgements, option.OptionType);
field.AssertNoFields();
break;
case "tcp.options.sack_perm":
Assert.AreEqual(TcpOptionType.SelectiveAcknowledgmentPermitted, option.OptionType);
foreach (var subField in field.Fields())
{
if (HandleOptionCommonFields(subField, option))
{
continue;
}
subField.AssertNoFields();
throw new InvalidOperationException("Invalid tcp options subfield " + subField.Name());
}
++currentOptionIndex;
break;
case "tcp.options.rvbd.probe":
Assert.AreEqual((TcpOptionType)76, option.OptionType);
// TODO: Support Riverbed.
++currentOptionIndex;
break;
case "tcp.options.rvbd.trpy":
Assert.AreEqual((TcpOptionType)78, option.OptionType);
// TODO: Support Riverbed.
++currentOptionIndex;
break;
case "tcp.options.experimental":
Assert.IsTrue(new [] { (TcpOptionType)253, (TcpOptionType)254 }.Contains(option.OptionType));
// TODO: Support Experimental.
++currentOptionIndex;
break;
default:
throw new InvalidOperationException("Invalid tcp options field " + field.Name());
}
}
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionSelectiveAcknowledgment);
}
internal override bool EqualsData(TcpOption other)
{
return(other is TcpOptionSimple);
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionTimestamp);
}
internal override bool EqualsData(TcpOption other)
{
return other is TcpOptionSelectiveAcknowledgmentPermitted;
}
private static bool HandleOptionCommonFields(XElement subfield, TcpOption option)
{
switch (subfield.Name())
{
case "tcp.option_kind":
subfield.AssertNoFields();
subfield.AssertShowDecimal((byte)option.OptionType);
return true;
case "tcp.options.type":
subfield.AssertShowDecimal((byte)option.OptionType);
return true;
case "tcp.option_len":
subfield.AssertNoFields();
subfield.AssertShowDecimal(option.Length);
return true;
default:
return false;
}
}
internal override sealed bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionConnectionCountBase);
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionPartialOrderServiceProfile);
}
private static void CompareTcpOptions(XElement element, TcpOptions options)
{
int currentOptionIndex = 0;
foreach (var field in element.Fields())
{
if (currentOptionIndex >= options.Count)
{
Assert.IsFalse(options.IsValid, "Options IsValid");
Assert.IsTrue(
field.Show().StartsWith("Unknown (0x0a) ") || // Unknown in Wireshark but known (and invalid) in Pcap.Net
field.Show().Contains("bytes says option goes past end of options") ||
field.Show().Contains(") (with too-short option length = "),
"Options show: " + field.Show());
Assert.AreEqual(options.Count, currentOptionIndex, "Options Count");
return;
}
TcpOption option = options[currentOptionIndex];
switch (field.Name())
{
case "":
switch (option.OptionType)
{
case TcpOptionType.SelectiveNegativeAcknowledgements: // TODO: Support Selective Negative Acknowledgements.
Assert.IsTrue(field.Show().StartsWith(option.GetWiresharkString()));
field.AssertNoFields();
break;
case (TcpOptionType)78: // TODO: Support Riverbed.
break;
default:
field.AssertShow(option.GetWiresharkString());
break;
}
switch (option.OptionType)
{
case TcpOptionType.WindowScale:
TcpOptionWindowScale windowScale = (TcpOptionWindowScale)option;
foreach (var subField in field.Fields())
{
switch (subField.Name())
{
case "tcp.option_kind":
subField.AssertShowDecimal((byte)windowScale.OptionType);
break;
case "tcp.option_len":
subField.AssertShowDecimal(windowScale.Length);
break;
case "tcp.options.wscale.shift":
subField.AssertShowDecimal(windowScale.ScaleFactorLog);
break;
case "tcp.options.wscale.multiplier":
subField.AssertShowDecimal(1L << (windowScale.ScaleFactorLog % 32));
break;
default:
throw new InvalidOperationException("Invalid tcp options subfield " + subField.Name());
}
}
break;
case TcpOptionType.SelectiveAcknowledgment:
var selectiveAcknowledgmentOption = (TcpOptionSelectiveAcknowledgment)option;
int blockIndex = 0;
foreach (var subField in field.Fields())
{
switch (subField.Name())
{
case "tcp.options.sack":
subField.AssertShowDecimal(true);
break;
case "tcp.options.sack_le":
subField.AssertShowDecimal(selectiveAcknowledgmentOption.Blocks[blockIndex].LeftEdge);
break;
case "tcp.options.sack_re":
subField.AssertShowDecimal(selectiveAcknowledgmentOption.Blocks[blockIndex].RightEdge);
++blockIndex;
break;
default:
throw new InvalidOperationException("Invalid tcp options subfield " + subField.Name());
}
}
break;
case TcpOptionType.Timestamp:
var timestampOption = (TcpOptionTimestamp)option;
foreach (var subField in field.Fields())
{
switch (subField.Name())
{
case "tcp.option_kind":
subField.AssertShowDecimal((byte)option.OptionType);
break;
case "tcp.option_len":
subField.AssertShowDecimal(option.Length);
break;
case "tcp.options.timestamp.tsval":
subField.AssertShowDecimal(timestampOption.TimestampValue);
break;
case "tcp.options.timestamp.tsecr":
subField.AssertShowDecimal(timestampOption.TimestampEchoReply);
break;
default:
throw new InvalidOperationException("Invalid tcp options subfield " + subField.Name());
}
}
break;
default:
field.AssertNoFields();
break;
}
++currentOptionIndex;
break;
case "tcp.options.mss":
Assert.AreEqual(TcpOptionType.MaximumSegmentSize, option.OptionType);
field.AssertShowDecimal(true);
field.AssertNoFields();
break;
case "tcp.options.mss_val":
field.AssertShowDecimal(((TcpOptionMaximumSegmentSize)option).MaximumSegmentSize);
field.AssertNoFields();
++currentOptionIndex;
break;
case "tcp.options.echo":
Assert.IsTrue(option is TcpOptionEchoReply || option is TcpOptionEcho);
field.AssertShowDecimal(1);
field.AssertNoFields();
break;
case "tcp.options.cc":
Assert.IsTrue(option is TcpOptionConnectionCountBase);
field.AssertShowDecimal(1);
field.AssertNoFields();
break;
case "tcp.options.scps.vector":
Assert.AreEqual((TcpOptionType)20, option.OptionType);
if (field.Show() == "0")
{
++currentOptionIndex;
}
++currentOptionIndex;
break;
case "tcp.options.scps":
Assert.AreEqual((TcpOptionType)20, option.OptionType);
Assert.IsFalse(field.Fields().Any());
break;
case "tcp.options.snack": // TODO: Support Selective Negative Acknowledgements.
case "tcp.options.snack.offset":
case "tcp.options.snack.size":
Assert.AreEqual(TcpOptionType.SelectiveNegativeAcknowledgements, option.OptionType);
field.AssertNoFields();
break;
case "tcp.options.sack_perm":
Assert.AreEqual(TcpOptionType.SelectiveAcknowledgmentPermitted, option.OptionType);
field.AssertNoFields();
++currentOptionIndex;
break;
case "tcp.options.rvbd.probe":
Assert.AreEqual((TcpOptionType)76, option.OptionType);
// TODO: Support Riverbed.
++currentOptionIndex;
break;
case "tcp.options.rvbd.trpy":
Assert.AreEqual((TcpOptionType)78, option.OptionType);
// TODO: Support Riverbed.
++currentOptionIndex;
break;
default:
throw new InvalidOperationException("Invalid tcp options field " + field.Name());
}
}
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionMood);
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionMaximumSegmentSize);
}
internal override bool EqualsData(TcpOption other)
{
return EqualsData(other as TcpOptionAlternateChecksumRequest);
}
public static string GetWiresharkString(this TcpOption option)
{
switch (option.OptionType)
{
case TcpOptionType.EndOfOptionList:
return("End of Option List (EOL)");
case TcpOptionType.NoOperation:
return("No-Operation (NOP)");
case TcpOptionType.WindowScale:
byte scaleFactorLog = ((TcpOptionWindowScale)option).ScaleFactorLog;
return(string.Format("Window scale: {0} (multiply by {1})", scaleFactorLog, (1L << (scaleFactorLog % 32))));
case TcpOptionType.SelectiveAcknowledgmentPermitted:
return("SACK permitted");
case TcpOptionType.SelectiveAcknowledgment:
IEnumerable <TcpOptionSelectiveAcknowledgmentBlock> blocks = ((TcpOptionSelectiveAcknowledgment)option).Blocks;
return("SACK:" + (blocks.Count() == 0
? string.Empty
: ((TcpOptionSelectiveAcknowledgment)option).Blocks.SequenceToString(" ", " ")));
case TcpOptionType.Echo:
return("Echo: " + ((TcpOptionEcho)option).Info);
case TcpOptionType.EchoReply:
return("Echo reply: " + ((TcpOptionEchoReply)option).Info);
case TcpOptionType.Timestamp:
TcpOptionTimestamp timestampOption = (TcpOptionTimestamp)option;
return("Timestamps: TSval " + timestampOption.TimestampValue + ", TSecr " + timestampOption.TimestampEchoReply);
case TcpOptionType.ConnectionCount:
return("CC: " + ((TcpOptionConnectionCount)option).ConnectionCount);
case TcpOptionType.ConnectionCountNew:
return("CC.NEW: " + ((TcpOptionConnectionCountNew)option).ConnectionCount);
case TcpOptionType.ConnectionCountEcho:
return("CC.ECHO: " + ((TcpOptionConnectionCountEcho)option).ConnectionCount);
case TcpOptionType.Md5Signature:
return("TCP MD5 signature");
case (TcpOptionType)20:
return("SCPS capabilities" + (option.Length >= 4
? string.Empty
: " (with option length = " + option.Length + " bytes; should be >= 4)"));
case (TcpOptionType)21:
return("Selective Negative Acknowledgement" + (option.Length == 6
? string.Empty
: " (with option length = " + option.Length + " bytes; should be 6)"));
case (TcpOptionType)22:
return("SCPS record boundary" + (option.Length == 2
? string.Empty
: " (with option length = " + option.Length + " bytes; should be 2)"));
case (TcpOptionType)23:
return("SCPS corruption experienced" + (option.Length == 2
? string.Empty
: " (with option length = " + option.Length + " bytes; should be 2)"));
case TcpOptionType.PartialOrderConnectionPermitted: // 9.
case TcpOptionType.PartialOrderServiceProfile: // 10.
case TcpOptionType.AlternateChecksumRequest: // 14.
case TcpOptionType.AlternateChecksumData: // 15.
case TcpOptionType.Mood: // 25.
return(string.Format("Unknown (0x{0}) ({1} bytes)", ((byte)option.OptionType).ToString("x2"), option.Length));
default:
if (typeof(TcpOptionType).GetEnumValues <TcpOptionType>().Contains(option.OptionType))
{
throw new InvalidOperationException("Invalid option type " + option.OptionType);
}
return(string.Format("Unknown (0x{0}) ({1} bytes)", ((byte)option.OptionType).ToString("x2"), option.Length));
}
}
