Here is a list of all documented files with brief descriptions:

ArpLayer.h
Device.h
DhcpLayer.h
DnsLayer.h
DnsLayerEnums.h
DnsResource.h
DnsResourceData.h
DpdkDevice.h
DpdkDeviceList.h
EthLayer.h
GeneralUtils.h
GreLayer.h
HttpLayer.h
IcmpLayer.h
IgmpLayer.h
IpAddress.h
IPReassembly.h
IpUtils.h
IPv4Layer.h
IPv6Extensions.h
IPv6Layer.h
Layer.h
Logger.h
LRUList.h
MacAddress.h
MplsLayer.h
NetworkUtils.h
NullLoopbackLayer.h
Packet.h
PacketTrailerLayer.h
PacketUtils.h
PayloadLayer.h
PcapDevice.h
PcapFileDevice.h
PcapFilter.h
PcapLiveDevice.h
PcapLiveDeviceList.h
PcapPlusPlusVersion.h
PcapRemoteDevice.h
PcapRemoteDeviceList.h
PfRingDevice.h
PfRingDeviceList.h
PlatformSpecificUtils.h
PointerVector.h
PPPoELayer.h
ProtocolType.h
RadiusLayer.h
RawPacket.h
RawSocketDevice.h
SdpLayer.h
SipLayer.h
SllLayer.h
SSLCommon.h
SSLHandshake.h
SSLLayer.h
SystemUtils.h
TablePrinter.h
TcpLayer.h
TcpReassembly.h
TextBasedProtocol.h
TLVData.h
UdpLayer.h
VlanLayer.h
VxlanLayer.h
WinPcapLiveDevice.h