public void IpV4OptionsTooLongErrorTest()
{
IpV4Options options = new IpV4Options(
new IpV4OptionTimestampOnly(1, 2,
new IpV4TimeOfDay(3), new IpV4TimeOfDay(4), new IpV4TimeOfDay(5),
new IpV4TimeOfDay(6), new IpV4TimeOfDay(7), new IpV4TimeOfDay(8),
new IpV4TimeOfDay(9), new IpV4TimeOfDay(10), new IpV4TimeOfDay(11),
new IpV4TimeOfDay(12), new IpV4TimeOfDay(13), new IpV4TimeOfDay(14),
new IpV4TimeOfDay(15), new IpV4TimeOfDay(16), new IpV4TimeOfDay(17)));
Assert.IsNotNull(options);
Assert.Fail();
}
private static void CompareIpV4Options(XElement element, IpV4Options options)
{
int currentOptionIndex = 0;
foreach (var field in element.Fields())
{
if (currentOptionIndex >= options.Count)
{
Assert.IsFalse(options.IsValid);
Assert.IsTrue(field.Show() == "Commercial IP security option" ||
field.Show() == "Loose source route (length byte past end of options)" ||
field.Show() == "Time stamp:" ||
field.Show().StartsWith("Unknown") ||
field.Show().StartsWith("Security") ||
field.Show().StartsWith("Router Alert (with option length = ") ||
field.Show().StartsWith("Stream identifier (with option length = ") ||
field.Show().Contains("with too") ||
field.Show().Contains(" bytes says option goes past end of options") ||
field.Show().Contains("(length byte past end of options)") ||
XElementExtensions.Show(field.Fields().First()).StartsWith("Pointer: ") && XElementExtensions.Show(field.Fields().First()).EndsWith(" (points to middle of address)") ||
field.Fields().Where(value => value.Show() == "(suboption would go past end of option)").Count() != 0, field.Show());
break;
}
IpV4Option option = options[currentOptionIndex++];
if (option.OptionType == IpV4OptionType.BasicSecurity ||
option.OptionType == IpV4OptionType.TraceRoute)
{
Assert.IsTrue(field.Show().StartsWith(option.GetWiresharkString()));
continue; // Wireshark doesn't support
}
field.AssertShow(option.GetWiresharkString());
if ((option is IpV4OptionUnknown))
{
continue;
}
var optionShows = from f in field.Fields() select f.Show();
MoreAssert.AreSequenceEqual(optionShows, option.GetWiresharkSubfieldStrings());
}
}
private static void CompareIpV4Options(XElement element, IpV4Datagram ipV4Datagram, IpV4Options options)
{
int currentOptionIndex = 0;
foreach (var field in element.Fields())
{
if (currentOptionIndex >= options.Count)
{
Assert.IsFalse(options.IsValid);
Assert.IsTrue(field.Show() == "Commercial IP security option" ||
field.Show() == "Loose source route (length byte past end of options)" ||
field.Show() == "Time stamp:" ||
field.Show().StartsWith("Unknown") ||
field.Show().StartsWith("Security") ||
field.Show().StartsWith("Router Alert (with option length = ") ||
field.Show().StartsWith("Stream ID (with option length = ") ||
field.Show().Contains("with too") ||
field.Show().Contains(" bytes says option goes past end of options") ||
field.Show().Contains("(length byte past end of options)") ||
XElementExtensions.Show(field.Fields().First()).StartsWith("Pointer: ") && XElementExtensions.Show(field.Fields().First()).EndsWith(" (points to middle of address)") ||
field.Fields().Where(value => value.Show() == "(suboption would go past end of option)").Count() != 0, field.Show());
break;
}
IpV4Option option = options[currentOptionIndex++];
switch (option.OptionType)
{
case IpV4OptionType.NoOperation:
case IpV4OptionType.EndOfOptionList:
field.AssertShow(option.OptionType == IpV4OptionType.EndOfOptionList ? "End of Options List (EOL)" : "No Operation (NOP)");
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.BasicSecurity:
field.AssertShow("Security (" + option.Length + " bytes)");
var basicSecurity = (IpV4OptionBasicSecurity)option;
int basicSecurityFlagsIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
case "ip.opt.sec_cl":
subfield.AssertNoFields();
subfield.AssertShowDecimal((byte)basicSecurity.ClassificationLevel);
break;
case "ip.opt.sec_prot_auth_flags":
foreach (XElement flagField in subfield.Fields())
{
flagField.AssertNoFields();
switch (flagField.Name())
{
case "ip.opt.sec_prot_auth_genser":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.Genser) ==
IpV4OptionSecurityProtectionAuthorities.Genser);
break;
case "ip.opt.sec_prot_auth_siop_esi":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.
SingleIntegrationOptionalPlanExtremelySensitiveInformation) ==
IpV4OptionSecurityProtectionAuthorities.
SingleIntegrationOptionalPlanExtremelySensitiveInformation);
break;
case "ip.opt.sec_prot_auth_sci":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.SensitiveCompartmentedInformation) ==
IpV4OptionSecurityProtectionAuthorities.SensitiveCompartmentedInformation);
break;
case "ip.opt.sec_prot_auth_nsa":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities & IpV4OptionSecurityProtectionAuthorities.Nsa) ==
IpV4OptionSecurityProtectionAuthorities.Nsa);
break;
case "ip.opt.sec_prot_auth_doe":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.DepartmentOfEnergy) ==
IpV4OptionSecurityProtectionAuthorities.DepartmentOfEnergy);
break;
case "ip.opt.sec_prot_auth_unassigned":
flagField.AssertShowDecimal(0);
break;
case "ip.opt.sec_prot_auth_fti":
flagField.AssertShowDecimal(basicSecurity.Length - basicSecurityFlagsIndex > 4);
break;
default:
throw new InvalidOperationException("Invalid flag field " + flagField.Name());
}
}
++basicSecurityFlagsIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.StreamIdentifier:
field.AssertShow("Stream ID (" + option.Length + " bytes): " + ((IpV4OptionStreamIdentifier)option).Identifier);
var streamIdentifier = (IpV4OptionStreamIdentifier)option;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
case "ip.opt.sid":
subfield.AssertNoFields();
subfield.AssertShowDecimal(streamIdentifier.Identifier);
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.LooseSourceRouting:
field.AssertShow("Loose Source Route (" + option.Length + " bytes)");
var looseSourceRouting = (IpV4OptionLooseSourceRouting)option;
int looseRouteIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
case "ip.opt.ptr":
subfield.AssertShowDecimal(IpV4Address.SizeOf * (looseSourceRouting.PointedAddressIndex + 1));
subfield.AssertNoFields();
break;
case "ip.rec_rt":
case "ip.dst":
case "ip.addr":
case "ip.dst_host":
case "ip.src_rt":
subfield.AssertShow(looseSourceRouting.Route[looseRouteIndex].ToString());
subfield.AssertNoFields();
break;
case "ip.rec_rt_host":
case "ip.host":
case "ip.src_rt_host":
subfield.AssertShow(looseSourceRouting.Route[looseRouteIndex].ToString());
subfield.AssertNoFields();
++looseRouteIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.RecordRoute:
field.AssertShow("Record Route (" + option.Length + " bytes)");
var recordRoute = (IpV4OptionRecordRoute)option;
int recordRouteIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
case "ip.opt.ptr":
subfield.AssertShowDecimal(IpV4Address.SizeOf * (recordRoute.PointedAddressIndex + 1));
subfield.AssertNoFields();
break;
case "ip.rec_rt":
case "ip.empty_rt":
subfield.AssertShow(recordRoute.Route[recordRouteIndex].ToString());
subfield.AssertNoFields();
break;
case "ip.rec_rt_host":
case "ip.empty_rt_host":
subfield.AssertShow(recordRoute.Route[recordRouteIndex].ToString());
subfield.AssertNoFields();
++recordRouteIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.StrictSourceRouting:
field.AssertShow("Strict Source Route (" + option.Length + " bytes)");
var strictSourceRouting = (IpV4OptionStrictSourceRouting)option;
int strictSourceRoutingIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
case "ip.opt.ptr":
subfield.AssertShowDecimal(IpV4Address.SizeOf * (strictSourceRouting.PointedAddressIndex + 1));
subfield.AssertNoFields();
break;
case "ip.dst":
case "ip.addr":
case "ip.dst_host":
case "ip.rec_rt":
case "ip.src_rt":
subfield.AssertShow(strictSourceRouting.Route[strictSourceRoutingIndex].ToString());
subfield.AssertNoFields();
break;
case "ip.host":
case "ip.rec_rt_host":
case "ip.src_rt_host":
subfield.AssertShow(strictSourceRouting.Route[strictSourceRoutingIndex].ToString());
subfield.AssertNoFields();
++strictSourceRoutingIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.RouterAlert:
var routerAlert = (IpV4OptionRouterAlert)option;
field.AssertShow("Router Alert (" + option.Length + " bytes): " +
((routerAlert.Value != 0) ? "Reserved (" + routerAlert.Value + ")" : "Router shall examine packet (0)"));
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
switch (subfield.Name())
{
case "ip.opt.ra":
subfield.AssertNoFields();
subfield.AssertShowDecimal(routerAlert.Value);
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.TraceRoute:
field.AssertShow("Traceroute (" + option.Length + " bytes)");
var traceRoute = (IpV4OptionTraceRoute)option;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
subfield.AssertNoFields();
switch (subfield.Name())
{
case "ip.opt.id_number":
subfield.AssertShowDecimal(traceRoute.Identification);
break;
case "ip.opt.ohc":
subfield.AssertShowDecimal(traceRoute.OutboundHopCount);
break;
case "ip.opt.rhc":
subfield.AssertShowDecimal(traceRoute.ReturnHopCount);
break;
case "ip.opt.originator":
subfield.AssertShow(traceRoute.OriginatorIpAddress.ToString());
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.InternetTimestamp:
field.AssertShow("Time Stamp (" + option.Length + " bytes)");
var timestamp = (IpV4OptionTimestamp)option;
int timestampIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
subfield.AssertNoFields();
switch (subfield.Name())
{
case "":
var subfieldParts = subfield.Show().Split(new[] { ':', '=', ',' }, StringSplitOptions.RemoveEmptyEntries);
string subfieldValue = subfieldParts[1].Trim();
switch (subfieldParts[0].Trim())
{
case "Pointer":
Assert.AreEqual(timestamp.PointedIndex, int.Parse(subfieldValue) / 4 - 1);
break;
case "Overflow":
Assert.AreEqual(timestamp.Overflow.ToString(), subfieldValue);
break;
case "Flag":
switch (timestamp.TimestampType)
{
case IpV4OptionTimestampType.AddressAndTimestamp:
Assert.AreEqual("Time stamp and address", subfieldValue);
break;
case IpV4OptionTimestampType.TimestampOnly:
Assert.AreEqual("Time stamps only", subfieldValue);
break;
case IpV4OptionTimestampType.AddressPrespecified:
Assert.AreEqual("Time stamps for prespecified addresses", subfieldValue);
break;
default:
throw new InvalidOperationException("Invalid timestamp type: " + timestamp.TimestampType);
}
break;
case "Time stamp":
var timestampOnly = (IpV4OptionTimestampOnly)timestamp;
Assert.AreEqual(timestampOnly.Timestamps[timestampIndex].MillisecondsSinceMidnightUniversalTime, uint.Parse(subfieldValue));
++timestampIndex;
break;
case "Address":
Assert.AreEqual(4, subfieldParts.Length);
var timestampAndAddress = (IpV4OptionTimestampAndAddress)timestamp;
Assert.AreEqual(timestampAndAddress.TimedRoute[timestampIndex].Address.ToString(), subfieldParts[1].Trim());
Assert.AreEqual("time stamp", subfieldParts[2].Trim());
Assert.AreEqual(timestampAndAddress.TimedRoute[timestampIndex].TimeOfDay.MillisecondsSinceMidnightUniversalTime,
uint.Parse(subfieldParts[3]));
++timestampIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Show());
}
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.QuickStart:
IpV4OptionQuickStart quickStart = (IpV4OptionQuickStart)option;
StringBuilder quickStartWireshark = new StringBuilder("Quick-Start (" + option.Length + " bytes): ");
quickStartWireshark.Append(quickStart.QuickStartFunction == IpV4OptionQuickStartFunction.RateRequest ? "Rate request" : "Rate report");
quickStartWireshark.Append(" (" + (byte)quickStart.QuickStartFunction + ")");
quickStartWireshark.Append(", ");
if (quickStart.RateKbps == 0)
{
quickStartWireshark.Append("0 bit/s");
}
else if (quickStart.RateKbps < 1024)
{
quickStartWireshark.Append(quickStart.RateKbps + " Kbit/s");
}
else if (quickStart.RateKbps < 1024 * 1024)
{
quickStartWireshark.Append(((double)quickStart.RateKbps / 1000).ToString(CultureInfo.InvariantCulture) + " Mbit/s");
}
else
{
quickStartWireshark.Append(((double)quickStart.RateKbps / 1000000).ToString(CultureInfo.InvariantCulture) + " Gbit/s");
}
if (quickStart.QuickStartFunction == IpV4OptionQuickStartFunction.RateRequest)
{
quickStartWireshark.Append(", QS TTL " + quickStart.Ttl + ", QS TTL diff " + (256 + ipV4Datagram.Ttl - quickStart.Ttl) % 256);
}
field.AssertShow(quickStartWireshark.ToString());
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
{
continue;
}
subfield.AssertNoFields();
switch (subfield.Name())
{
case "ip.opt.qs_func":
subfield.AssertShowDecimal((byte)quickStart.QuickStartFunction);
break;
case "ip.opt.qs_rate":
subfield.AssertShowDecimal(quickStart.Rate);
break;
case "ip.opt.qs_ttl":
case "ip.opt.qs_unused":
subfield.AssertShowDecimal(quickStart.Ttl);
break;
case "ip.opt.qs_ttl_diff":
subfield.AssertShowDecimal((256 + ipV4Datagram.Ttl - quickStart.Ttl) % 256);
break;
case "ip.opt.qs_nonce":
subfield.AssertShowDecimal(quickStart.Nonce);
break;
case "ip.opt.qs_reserved":
subfield.AssertShowDecimal(0);
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.MaximumTransmissionUnitProbe:
// TODO: Support MTU Proble.
Assert.IsTrue(field.Show().StartsWith("MTU Probe (" + option.Length + " bytes): "));
break;
case (IpV4OptionType)12:
// TODO: Support 12.
if (option.Length != 4)
{
field.AssertShow("MTU Reply (with option length = " + option.Length + " bytes; should be 4)");
}
else
{
Assert.IsTrue(field.Show().StartsWith("MTU Reply (4 bytes): "));
}
break;
case (IpV4OptionType)133:
// TODO: Support 133.
if (option.Length >= 3)
{
field.AssertShow("Extended Security (" + option.Length + " bytes)");
}
else
{
field.AssertShow("Extended Security (with option length = " + option.Length + " bytes; should be >= 3)");
}
break;
case (IpV4OptionType)134:
// TODO: Support 134.
field.AssertShow("Commercial Security " +
(option.Length >= 10 ? "(" + option.Length + " bytes)" : "(with option length = " + option.Length + " bytes; should be >= 10)"));
break;
case (IpV4OptionType)149:
// TODO: Support 149.
if (option.Length >= 6)
{
field.AssertShow("Selective Directed Broadcast (" + option.Length + " bytes)");
}
else
{
field.AssertShow("Selective Directed Broadcast (with option length = " + option.Length + " bytes; should be >= 6)");
}
break;
default:
field.AssertShow("Unknown (0x" + ((byte)option.OptionType).ToString("x2") + ") (" + option.Length + " bytes)");
field.AssertNoFields();
break;
}
}
}
public void IpV4OptionsTooLongErrorTest()
{
IpV4Options options = new IpV4Options(
new IpV4OptionTimestampOnly(1, 2,
new IpV4TimeOfDay(3), new IpV4TimeOfDay(4), new IpV4TimeOfDay(5),
new IpV4TimeOfDay(6), new IpV4TimeOfDay(7), new IpV4TimeOfDay(8),
new IpV4TimeOfDay(9), new IpV4TimeOfDay(10), new IpV4TimeOfDay(11),
new IpV4TimeOfDay(12), new IpV4TimeOfDay(13), new IpV4TimeOfDay(14),
new IpV4TimeOfDay(15), new IpV4TimeOfDay(16), new IpV4TimeOfDay(17)));
Assert.IsNotNull(options);
Assert.Fail();
}
private static void CompareIpV4Options(XElement element, IpV4Datagram ipV4Datagram, IpV4Options options)
{
int currentOptionIndex = 0;
foreach (var field in element.Fields())
{
if (currentOptionIndex >= options.Count)
{
Assert.IsFalse(options.IsValid);
Assert.IsTrue(field.Show() == "Commercial IP security option" ||
field.Show() == "Loose source route (length byte past end of options)" ||
field.Show() == "Time stamp:" ||
field.Show().StartsWith("Unknown") ||
field.Show().StartsWith("Security") ||
field.Show().StartsWith("Router Alert (with option length = ") ||
field.Show().StartsWith("Stream ID (with option length = ") ||
field.Show().Contains("with too") ||
field.Show().Contains(" bytes says option goes past end of options") ||
field.Show().Contains("(length byte past end of options)") ||
XElementExtensions.Show(field.Fields().First()).StartsWith("Pointer: ") && XElementExtensions.Show(field.Fields().First()).EndsWith(" (points to middle of address)") ||
field.Fields().Where(value => value.Show() == "(suboption would go past end of option)").Count() != 0, field.Show());
break;
}
IpV4Option option = options[currentOptionIndex++];
switch (option.OptionType)
{
case IpV4OptionType.NoOperation:
case IpV4OptionType.EndOfOptionList:
field.AssertShow(option.OptionType == IpV4OptionType.EndOfOptionList ? "End of Options List (EOL)" : "No Operation (NOP)");
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.BasicSecurity:
field.AssertShow("Security (" + option.Length + " bytes)");
var basicSecurity = (IpV4OptionBasicSecurity)option;
int basicSecurityFlagsIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
case "ip.opt.sec_cl":
subfield.AssertNoFields();
subfield.AssertShowDecimal((byte)basicSecurity.ClassificationLevel);
break;
case "ip.opt.sec_prot_auth_flags":
foreach (XElement flagField in subfield.Fields())
{
flagField.AssertNoFields();
switch (flagField.Name())
{
case "ip.opt.sec_prot_auth_genser":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.Genser) ==
IpV4OptionSecurityProtectionAuthorities.Genser);
break;
case "ip.opt.sec_prot_auth_siop_esi":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.
SingleIntegrationOptionalPlanExtremelySensitiveInformation) ==
IpV4OptionSecurityProtectionAuthorities.
SingleIntegrationOptionalPlanExtremelySensitiveInformation);
break;
case "ip.opt.sec_prot_auth_sci":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.SensitiveCompartmentedInformation) ==
IpV4OptionSecurityProtectionAuthorities.SensitiveCompartmentedInformation);
break;
case "ip.opt.sec_prot_auth_nsa":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities & IpV4OptionSecurityProtectionAuthorities.Nsa) ==
IpV4OptionSecurityProtectionAuthorities.Nsa);
break;
case "ip.opt.sec_prot_auth_doe":
flagField.AssertShowDecimal((basicSecurity.ProtectionAuthorities &
IpV4OptionSecurityProtectionAuthorities.DepartmentOfEnergy) ==
IpV4OptionSecurityProtectionAuthorities.DepartmentOfEnergy);
break;
case "ip.opt.sec_prot_auth_unassigned":
flagField.AssertShowDecimal(0);
break;
case "ip.opt.sec_prot_auth_fti":
flagField.AssertShowDecimal(basicSecurity.Length - basicSecurityFlagsIndex > 4);
break;
default:
throw new InvalidOperationException("Invalid flag field " + flagField.Name());
}
}
++basicSecurityFlagsIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.StreamIdentifier:
field.AssertShow("Stream ID (" + option.Length + " bytes): " + ((IpV4OptionStreamIdentifier)option).Identifier);
var streamIdentifier = (IpV4OptionStreamIdentifier)option;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
case "ip.opt.sid":
subfield.AssertNoFields();
subfield.AssertShowDecimal(streamIdentifier.Identifier);
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.LooseSourceRouting:
field.AssertShow("Loose Source Route (" + option.Length + " bytes)");
var looseSourceRouting = (IpV4OptionLooseSourceRouting)option;
int looseRouteIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
case "ip.opt.ptr":
subfield.AssertShowDecimal(IpV4Address.SizeOf * (looseSourceRouting.PointedAddressIndex + 1));
subfield.AssertNoFields();
break;
case "ip.rec_rt":
case "ip.dst":
case "ip.addr":
case "ip.dst_host":
case "ip.src_rt":
subfield.AssertShow(looseSourceRouting.Route[looseRouteIndex].ToString());
subfield.AssertNoFields();
break;
case "ip.rec_rt_host":
case "ip.host":
case "ip.src_rt_host":
subfield.AssertShow(looseSourceRouting.Route[looseRouteIndex].ToString());
subfield.AssertNoFields();
++looseRouteIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.RecordRoute:
field.AssertShow("Record Route (" + option.Length + " bytes)");
var recordRoute = (IpV4OptionRecordRoute)option;
int recordRouteIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
case "ip.opt.ptr":
subfield.AssertShowDecimal(IpV4Address.SizeOf * (recordRoute.PointedAddressIndex + 1));
subfield.AssertNoFields();
break;
case "ip.rec_rt":
case "ip.empty_rt":
subfield.AssertShow(recordRoute.Route[recordRouteIndex].ToString());
subfield.AssertNoFields();
break;
case "ip.rec_rt_host":
case "ip.empty_rt_host":
subfield.AssertShow(recordRoute.Route[recordRouteIndex].ToString());
subfield.AssertNoFields();
++recordRouteIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.StrictSourceRouting:
field.AssertShow("Strict Source Route (" + option.Length + " bytes)");
var strictSourceRouting = (IpV4OptionStrictSourceRouting)option;
int strictSourceRoutingIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
case "ip.opt.ptr":
subfield.AssertShowDecimal(IpV4Address.SizeOf * (strictSourceRouting.PointedAddressIndex + 1));
subfield.AssertNoFields();
break;
case "ip.dst":
case "ip.addr":
case "ip.dst_host":
case "ip.rec_rt":
case "ip.src_rt":
subfield.AssertShow(strictSourceRouting.Route[strictSourceRoutingIndex].ToString());
subfield.AssertNoFields();
break;
case "ip.host":
case "ip.rec_rt_host":
case "ip.src_rt_host":
subfield.AssertShow(strictSourceRouting.Route[strictSourceRoutingIndex].ToString());
subfield.AssertNoFields();
++strictSourceRoutingIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.RouterAlert:
var routerAlert = (IpV4OptionRouterAlert)option;
field.AssertShow("Router Alert (" + option.Length + " bytes): " +
((routerAlert.Value != 0) ? "Reserved (" + routerAlert.Value + ")" : "Router shall examine packet (0)"));
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
switch (subfield.Name())
{
case "ip.opt.ra":
subfield.AssertNoFields();
subfield.AssertShowDecimal(routerAlert.Value);
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.TraceRoute:
field.AssertShow("Traceroute (" + option.Length + " bytes)");
var traceRoute = (IpV4OptionTraceRoute)option;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
subfield.AssertNoFields();
switch (subfield.Name())
{
case "ip.opt.id_number":
subfield.AssertShowDecimal(traceRoute.Identification);
break;
case "ip.opt.ohc":
subfield.AssertShowDecimal(traceRoute.OutboundHopCount);
break;
case "ip.opt.rhc":
subfield.AssertShowDecimal(traceRoute.ReturnHopCount);
break;
case "ip.opt.originator":
subfield.AssertShow(traceRoute.OriginatorIpAddress.ToString());
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.InternetTimestamp:
field.AssertShow("Time Stamp (" + option.Length + " bytes)");
var timestamp = (IpV4OptionTimestamp)option;
int timestampIndex = 0;
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
subfield.AssertNoFields();
switch (subfield.Name())
{
case "":
var subfieldParts = subfield.Show().Split(new[] { ':', '=', ',' }, StringSplitOptions.RemoveEmptyEntries);
string subfieldValue = subfieldParts[1].Trim();
switch (subfieldParts[0].Trim())
{
case "Pointer":
Assert.AreEqual(timestamp.PointedIndex, int.Parse(subfieldValue) / 4 - 1);
break;
case "Overflow":
Assert.AreEqual(timestamp.Overflow.ToString(), subfieldValue);
break;
case "Flag":
switch (timestamp.TimestampType)
{
case IpV4OptionTimestampType.AddressAndTimestamp:
Assert.AreEqual("Time stamp and address", subfieldValue);
break;
case IpV4OptionTimestampType.TimestampOnly:
Assert.AreEqual("Time stamps only", subfieldValue);
break;
case IpV4OptionTimestampType.AddressPrespecified:
Assert.AreEqual("Time stamps for prespecified addresses", subfieldValue);
break;
default:
throw new InvalidOperationException("Invalid timestamp type: " + timestamp.TimestampType);
}
break;
case "Time stamp":
var timestampOnly = (IpV4OptionTimestampOnly)timestamp;
Assert.AreEqual(timestampOnly.Timestamps[timestampIndex].MillisecondsSinceMidnightUniversalTime, uint.Parse(subfieldValue));
++timestampIndex;
break;
case "Address":
Assert.AreEqual(4, subfieldParts.Length);
var timestampAndAddress = (IpV4OptionTimestampAndAddress)timestamp;
Assert.AreEqual(timestampAndAddress.TimedRoute[timestampIndex].Address.ToString(), subfieldParts[1].Trim());
Assert.AreEqual("time stamp", subfieldParts[2].Trim());
Assert.AreEqual(timestampAndAddress.TimedRoute[timestampIndex].TimeOfDay.MillisecondsSinceMidnightUniversalTime,
uint.Parse(subfieldParts[3]));
++timestampIndex;
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Show());
}
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.QuickStart:
IpV4OptionQuickStart quickStart = (IpV4OptionQuickStart)option;
StringBuilder quickStartWireshark = new StringBuilder("Quick-Start (" + option.Length + " bytes): ");
quickStartWireshark.Append(quickStart.QuickStartFunction == IpV4OptionQuickStartFunction.RateRequest ? "Rate request" : "Rate report");
quickStartWireshark.Append(" (" + (byte)quickStart.QuickStartFunction + ")");
quickStartWireshark.Append(", ");
if (quickStart.RateKbps == 0)
quickStartWireshark.Append("0 bit/s");
else if (quickStart.RateKbps < 1024)
quickStartWireshark.Append(quickStart.RateKbps + " Kbit/s");
else if (quickStart.RateKbps < 1024 * 1024)
quickStartWireshark.Append(((double)quickStart.RateKbps / 1000).ToString(CultureInfo.InvariantCulture) + " Mbit/s");
else
quickStartWireshark.Append(((double)quickStart.RateKbps / 1000000).ToString(CultureInfo.InvariantCulture) + " Gbit/s");
if (quickStart.QuickStartFunction == IpV4OptionQuickStartFunction.RateRequest)
quickStartWireshark.Append(", QS TTL " + quickStart.Ttl + ", QS TTL diff " + (256 + ipV4Datagram.Ttl - quickStart.Ttl) % 256);
field.AssertShow(quickStartWireshark.ToString());
foreach (var subfield in field.Fields())
{
if (HandleCommonOptionSubfield(subfield, option))
continue;
subfield.AssertNoFields();
switch (subfield.Name())
{
case "ip.opt.qs_func":
subfield.AssertShowDecimal((byte)quickStart.QuickStartFunction);
break;
case "ip.opt.qs_rate":
subfield.AssertShowDecimal(quickStart.Rate);
break;
case "ip.opt.qs_ttl":
case "ip.opt.qs_unused":
subfield.AssertShowDecimal(quickStart.Ttl);
break;
case "ip.opt.qs_ttl_diff":
subfield.AssertShowDecimal((256 + ipV4Datagram.Ttl - quickStart.Ttl) % 256);
break;
case "ip.opt.qs_nonce":
subfield.AssertShowDecimal(quickStart.Nonce);
break;
case "ip.opt.qs_reserved":
subfield.AssertShowDecimal(0);
break;
default:
throw new InvalidOperationException("Invalid subfield " + subfield.Name());
}
}
break;
case IpV4OptionType.MaximumTransmissionUnitProbe:
// TODO: Support MTU Proble.
Assert.IsTrue(field.Show().StartsWith("MTU Probe (" + option.Length + " bytes): "));
break;
case (IpV4OptionType)12:
// TODO: Support 12.
if (option.Length != 4)
field.AssertShow("MTU Reply (with option length = " + option.Length + " bytes; should be 4)");
else
Assert.IsTrue(field.Show().StartsWith("MTU Reply (4 bytes): "));
break;
case (IpV4OptionType)133:
// TODO: Support 133.
if (option.Length >= 3)
field.AssertShow("Extended Security (" + option.Length + " bytes)");
else
field.AssertShow("Extended Security (with option length = " + option.Length + " bytes; should be >= 3)");
break;
case (IpV4OptionType)134:
// TODO: Support 134.
field.AssertShow("Commercial Security " +
(option.Length >= 10 ? "(" + option.Length + " bytes)" : "(with option length = " + option.Length + " bytes; should be >= 10)"));
break;
case (IpV4OptionType)149:
// TODO: Support 149.
if (option.Length >= 6)
field.AssertShow("Selective Directed Broadcast (" + option.Length + " bytes)");
else
field.AssertShow("Selective Directed Broadcast (with option length = " + option.Length + " bytes; should be >= 6)");
break;
default:
field.AssertShow("Unknown (0x" + ((byte)option.OptionType).ToString("x2") + ") (" + option.Length + " bytes)");
field.AssertNoFields();
break;
}
}
}
internal static void WriteHeader(byte[] buffer, int offset,
byte typeOfService, ushort identification,
IpV4Fragmentation fragmentation,
byte ttl, IpV4Protocol protocol, ushort? headerChecksum,
IpV4Address source, IpV4Address destination,
IpV4Options options, int payloadLength)
{
int headerLength = HeaderMinimumLength + options.BytesLength;
buffer[offset + Offset.VersionAndHeaderLength] = (byte)((DefaultVersion << 4) + headerLength / 4);
buffer[offset + Offset.TypeOfService] = typeOfService;
buffer.Write(offset + Offset.TotalLength, (ushort)(headerLength + payloadLength), Endianity.Big);
buffer.Write(offset + Offset.Identification, identification, Endianity.Big);
fragmentation.Write(buffer, offset + Offset.Fragmentation);
buffer[offset + Offset.Ttl] = ttl;
buffer[offset + Offset.Protocol] = (byte)protocol;
buffer.Write(offset + Offset.Source, source, Endianity.Big);
buffer.Write(offset + Offset.Destination, destination, Endianity.Big);
options.Write(buffer, offset + Offset.Options);
ushort headerChecksumValue =
headerChecksum == null
? Sum16BitsToChecksum(Sum16Bits(buffer, offset, headerLength))
: headerChecksum.Value;
buffer.Write(offset + Offset.HeaderChecksum, headerChecksumValue, Endianity.Big);
}
internal static IpV4Address CalculateDestination(IpV4Address currentDestination, IpV4Options options)
{
if (options == null)
return currentDestination;
IpV4OptionRoute destinationControllerRouteOption =
(IpV4OptionRoute)options.OptionsCollection.FirstOrDefault(option => option.OptionType == IpV4OptionType.LooseSourceRouting ||
option.OptionType == IpV4OptionType.StrictSourceRouting);
if (destinationControllerRouteOption != null)
{
ReadOnlyCollection<IpV4Address> route = destinationControllerRouteOption.Route;
if (destinationControllerRouteOption.PointedAddressIndex < route.Count)
return route[route.Count - 1];
}
return currentDestination;
}
private static void CompareIpV4Options(XElement element, IpV4Options options)
{
int currentOptionIndex = 0;
foreach (var field in element.Fields())
{
if (currentOptionIndex >= options.Count)
{
Assert.IsFalse(options.IsValid);
Assert.IsTrue(field.Show() == "Commercial IP security option" ||
field.Show() == "Loose source route (length byte past end of options)" ||
field.Show() == "Time stamp:" ||
field.Show().StartsWith("Unknown") ||
field.Show().StartsWith("Security") ||
field.Show().StartsWith("Router Alert (with option length = ") ||
field.Show().StartsWith("Stream identifier (with option length = ") ||
field.Show().Contains("with too") ||
field.Show().Contains(" bytes says option goes past end of options") ||
field.Show().Contains("(length byte past end of options)") ||
XElementExtensions.Show(field.Fields().First()).StartsWith("Pointer: ") && XElementExtensions.Show(field.Fields().First()).EndsWith(" (points to middle of address)") ||
field.Fields().Where(value => value.Show() == "(suboption would go past end of option)").Count() != 0, field.Show());
break;
}
IpV4Option option = options[currentOptionIndex++];
if (option.OptionType == IpV4OptionType.BasicSecurity ||
option.OptionType == IpV4OptionType.TraceRoute)
{
Assert.IsTrue(field.Show().StartsWith(option.GetWiresharkString()));
continue; // Wireshark doesn't support
}
field.AssertShow(option.GetWiresharkString());
if ((option is IpV4OptionUnknown))
continue;
var optionShows = from f in field.Fields() select f.Show();
MoreAssert.AreSequenceEqual(optionShows, option.GetWiresharkSubfieldStrings());
}
}
public static bool IsBadForWireshark(this IpV4Options options)
{
// TODO: This shouldn't be a factor once https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7043 is fixed.
return(options.OptionsCollection.Any(option => option.OptionType == IpV4OptionType.InternetTimestamp && option.Length < 5 ||
option.OptionType == IpV4OptionType.BasicSecurity && option.Length != 11));
}
