public void ReadPackets()
{
var pcapPacketReader = this.GetPcapPacketReader("pcap.pcap");
pcapPacketReader.Header.IsLittleEndian.Should().Be(true);
pcapPacketReader.Header.MagicNumber.Should().Be(0xA1B2C3D4);
pcapPacketReader.Header.MajorVersion.Should().Be(2);
pcapPacketReader.Header.MinorVersion.Should().Be(4);
pcapPacketReader.Header.MaxCapturedLength.Should().Be(65535);
pcapPacketReader.Header.DataLinkType.Should().Be(PacketDataLinkType.Ethernet);
var i = 0;
foreach (PcapPacket packet in pcapPacketReader.ReadPackets())
{
TestOutput.NewLine($"{packet.DataLinkType} {packet.TimestampNanosecond.ToDateTimeOffsetString()}");
packet.Header.IsLittleEndian.Should().Be(true);
packet.Header.Header.IsLittleEndian.Should().Be(true);
if (i == 0)
{
packet.TimestampNanosecond.Should().Be(1_549_110_206_807_127_000UL);
}
var ethernetFrame = new EthernetFrame
{
Bytes = packet.Payload
};
ethernetFrame.IsLittleEndian.Should().Be(false);
ethernetFrame.Length.Should().BeGreaterThan(0);
i++;
}
i.Should().Be(27);
}
public void dns()
{
this.GetPcapPacketReader("dns.pcap").ForEach(octets =>
{
var ethernetFrame = (EthernetFrame)octets;
var ipv4 = (IPv4Packet)ethernetFrame.Payload;
var udp = (UDPDatagram)ipv4.Payload;
var udpPayload = udp.Payload;
udpPayload.GetType().Should().Be(typeof(DNS));
TestOutput.NewLine();
TestOutput.Display(ethernetFrame);
Assert.True(true);
});
}
public void vxlan()
{
this.GetPcapPacketReader("vxlan.pcap").ForEach(bytes =>
{
var ethernetFrame = new EthernetFrame {
Bytes = bytes
};
var ipv4 = (IPv4Packet)ethernetFrame.Payload;
var udp = (UDPDatagram)ipv4.Payload;
var udpPayload = udp.Payload;
udpPayload.GetType().Should().Be(typeof(VXLAN));
TestOutput.NewLine();
TestOutput.Display(ethernetFrame);
});
}
public void ReadBlocks()
{
var pcapNGPacketReader = this.GetPcapNGPacketReader("1-shb.11-idb.64-epb.1-nrb.11-isb.pcapng");
var blocks = pcapNGPacketReader.ReadBlocks().ToList();
blocks.Count.Should().Be(88);
var sectionHeaderBlock = (SectionHeaderBlock)blocks[0];
sectionHeaderBlock.Type.Should().Be(BlockType.SectionHeader);
sectionHeaderBlock.IsLittleEndian.Should().Be(true);
sectionHeaderBlock.TotalLength.Should().Be(140);
sectionHeaderBlock.MagicNumber.Should().Be(0x1A2B3C4DU);
sectionHeaderBlock.MajorVersion.Should().Be(1);
sectionHeaderBlock.MinorVersion.Should().Be(0);
sectionHeaderBlock.SectionLength.Should().Be(4294967295u);
var interfaceDescriptionBlock = (InterfaceDescriptionBlock)blocks[1];
interfaceDescriptionBlock.IsLittleEndian.Should().Be(true);
interfaceDescriptionBlock.Type.Should().Be(BlockType.InterfaceDescription);
interfaceDescriptionBlock.TotalLength.Should().Be(116);
interfaceDescriptionBlock.DataLinkType.Should().Be(PacketDataLinkType.Ethernet);
interfaceDescriptionBlock.MaxCapturedLength.Should().Be(262144u);
var enhancedPacketBlock = (EnhancedPacketBlock)blocks[12];
enhancedPacketBlock.InterfaceDescription.Should().BeSameAs(interfaceDescriptionBlock);
enhancedPacketBlock.IsLittleEndian.Should().Be(true);
enhancedPacketBlock.Type.Should().Be(BlockType.EnhancedPacket);
enhancedPacketBlock.TotalLength.Should().Be(212);
enhancedPacketBlock.InterfaceId.Should().Be(0);
enhancedPacketBlock.CapturedLength.Should().Be(178);
enhancedPacketBlock.OriginalLength.Should().Be(178);
var nameResolutionBlock = (NameResolutionBlock)blocks[76];
nameResolutionBlock.Type.Should().Be(BlockType.NameResolution);
nameResolutionBlock.IsLittleEndian.Should().Be(true);
nameResolutionBlock.TotalLength.Should().Be(216);
var nameResolutionBlockRecords = nameResolutionBlock.GetRecords().ToList();
nameResolutionBlockRecords.Count.Should().Be(7);
var nameResolutionBlockRecord = nameResolutionBlockRecords[0];
nameResolutionBlockRecord.Type.Should().Be(NameResolutionBlock.RecordType.IPv4);
nameResolutionBlockRecord.ValueLength.Should().Be(25);
nameResolutionBlockRecord.IP.ToString().Should().Be("74.125.228.227");
nameResolutionBlockRecord.Host.Should().Be("clients.l.google.com");
var interfaceStatisticsBlock = (InterfaceStatisticsBlock)blocks[77];
interfaceStatisticsBlock.InterfaceDescription.Should().BeSameAs(interfaceDescriptionBlock);
interfaceStatisticsBlock.Should().NotBeAssignableTo <IPacket>();
interfaceStatisticsBlock.IsPacket.Should().Be(false);
interfaceStatisticsBlock.TotalLength.Should().Be(0x6c);
interfaceStatisticsBlock.InterfaceId.Should().Be(0);
foreach (var block in blocks)
{
block.SectionHeader.Should().BeSameAs(sectionHeaderBlock);
if (block.Type == BlockType.InterfaceStatistics)
{
var interfaceStatistics = (InterfaceStatisticsBlock)block;
TestOutput.NewLine($"{interfaceStatistics.InterfaceId} {interfaceStatistics.TimestampNanosecond.ToDateTimeOffsetString()}");
}
if (block.IsPacket == false)
{
continue;
}
var packet = block as IPacket;
TestOutput.NewLine($"{packet.DataLinkType} {packet.TimestampNanosecond.ToDateTimeOffsetString()}");
if (packet.DataLinkType != PacketDataLinkType.Ethernet)
{
continue;
}
var ethernetFrame = new EthernetFrame
{
Bytes = packet.Payload
};
TestOutput.NewLine();
TestOutput.Display(ethernetFrame);
}
}
