Manage pcap files for device models. More...

#include "trace-helper.h"

Public Types
enum	DataLinkType { DLT_NULL = 0 , DLT_EN10MB = 1 , DLT_PPP = 9 , DLT_RAW = 101 , DLT_IEEE802_11 = 105 , DLT_LINUX_SLL = 113 , DLT_PRISM_HEADER = 119 , DLT_IEEE802_11_RADIO = 127 , DLT_IEEE802_15_4 = 195 , DLT_NETLINK = 253 , DLT_LORATAP = 270 }
	This enumeration holds the data link types that will be written to the pcap file. More...

Public Member Functions
	PcapHelper ()
	Create a pcap helper. More...

	~PcapHelper ()
	Destroy a pcap helper. More...

Ptr< PcapFileWrapper >	CreateFile (std::string filename, std::ios::openmode filemode, DataLinkType dataLinkType, uint32_t snapLen=std::numeric_limits< uint32_t >::max(), int32_t tzCorrection=0)
	Create and initialize a pcap file. More...

std::string	GetFilenameFromDevice (std::string prefix, Ptr< NetDevice > device, bool useObjectNames=true)
	Let the pcap helper figure out a reasonable filename to use for a pcap file associated with a device. More...

std::string	GetFilenameFromInterfacePair (std::string prefix, Ptr< Object > object, uint32_t interface, bool useObjectNames=true)
	Let the pcap helper figure out a reasonable filename to use for the pcap file associated with a node. More...

template<typename T >
void	HookDefaultSink (Ptr< T > object, std::string traceName, Ptr< PcapFileWrapper > file)
	Hook a trace source to the default trace sink. More...

Static Private Member Functions
static void	DefaultSink (Ptr< PcapFileWrapper > file, Ptr< const Packet > p)
	The basic default trace sink. More...

static void	SinkWithHeader (Ptr< PcapFileWrapper > file, const Header &header, Ptr< const Packet > p)
	This trace sink passes a header separately from the packet to prevent creating a new packet (for performance reasons) More...

Detailed Description

Manage pcap files for device models.

Handling pcap files is a common operation for ns-3 devices. It is useful to provide a common base class for dealing with these ops.

Definition at line 39 of file trace-helper.h.

Member Enumeration Documentation

◆ DataLinkType

enum ns3::PcapHelper::DataLinkType

This enumeration holds the data link types that will be written to the pcap file.

We don't include pcap-bpf.h to avoid an explicit dependency on the real pcap and we don't make an enumeration of all of the values to make it easy to pass new values in.

For a list of Data Link Types see http://www.tcpdump.org/linktypes.html

Enumerator
DLT_NULL
DLT_EN10MB
DLT_PPP
DLT_RAW
DLT_IEEE802_11
DLT_LINUX_SLL
DLT_PRISM_HEADER
DLT_IEEE802_11_RADIO
DLT_IEEE802_15_4
DLT_NETLINK
DLT_LORATAP

Definition at line 51 of file trace-helper.h.

Constructor & Destructor Documentation

◆ PcapHelper()

ns3::PcapHelper::PcapHelper ( )

Create a pcap helper.

Definition at line 38 of file trace-helper.cc.

References NS_LOG_FUNCTION_NOARGS.

◆ ~PcapHelper()

ns3::PcapHelper::~PcapHelper ( )

Destroy a pcap helper.

Definition at line 43 of file trace-helper.cc.

References NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

◆ CreateFile()

Ptr< PcapFileWrapper > ns3::PcapHelper::CreateFile	(	std::string	filename,
		std::ios::openmode	filemode,
		DataLinkType	dataLinkType,
		uint32_t	snapLen = `std::numeric_limits<uint32_t>::max()`,
		int32_t	tzCorrection = `0`
	)

Create and initialize a pcap file.

Parameters

filename	file name
filemode	file mode
dataLinkType	data link type of packet data
snapLen	maximum length of packet data stored in records
tzCorrection	time zone correction to be applied to timestamps of packets

Returns: a smart pointer to the Pcap file

Definition at line 49 of file trace-helper.cc.

References create-module::file, NS_ABORT_MSG_IF, and NS_LOG_FUNCTION.

Referenced by ns3::WimaxHelper::EnablePcapInternal(), ns3::CsmaHelper::EnablePcapInternal(), ns3::FdNetDeviceHelper::EnablePcapInternal(), ns3::LrWpanHelper::EnablePcapInternal(), ns3::PointToPointHelper::EnablePcapInternal(), ns3::WifiPhyHelper::EnablePcapInternal(), ns3::ClickInternetStackHelper::EnablePcapIpv4Internal(), ns3::InternetStackHelper::EnablePcapIpv4Internal(), and ns3::InternetStackHelper::EnablePcapIpv6Internal().

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◆ DefaultSink()

void ns3::PcapHelper::DefaultSink	(	Ptr< PcapFileWrapper >	file,
		Ptr< const Packet >	p
	)

staticprivate

The basic default trace sink.

This one just writes the packet to the pcap file which is good enough for most kinds of captures.

Parameters

file	the file to write to
p	the packet to write

Definition at line 169 of file trace-helper.cc.

References create-module::file, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

Referenced by HookDefaultSink().

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◆ GetFilenameFromDevice()

std::string ns3::PcapHelper::GetFilenameFromDevice	(	std::string	prefix,
		Ptr< NetDevice >	device,
		bool	useObjectNames = `true`
	)

Let the pcap helper figure out a reasonable filename to use for a pcap file associated with a device.

Parameters

prefix	prefix string
device	NetDevice
useObjectNames	use node and device names instead of indexes

Returns: file name

Definition at line 79 of file trace-helper.cc.

References ns3::Names::FindName(), ns3::Node::GetId(), NS_ABORT_MSG_UNLESS, and NS_LOG_FUNCTION.

Referenced by ns3::WimaxHelper::EnablePcapInternal(), ns3::CsmaHelper::EnablePcapInternal(), ns3::FdNetDeviceHelper::EnablePcapInternal(), ns3::LrWpanHelper::EnablePcapInternal(), ns3::PointToPointHelper::EnablePcapInternal(), and ns3::WifiPhyHelper::EnablePcapInternal().

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◆ GetFilenameFromInterfacePair()

std::string ns3::PcapHelper::GetFilenameFromInterfacePair	(	std::string	prefix,
		Ptr< Object >	object,
		uint32_t	interface,
		bool	useObjectNames = `true`
	)

Let the pcap helper figure out a reasonable filename to use for the pcap file associated with a node.

Parameters

prefix	prefix string
object	interface (such as Ipv4Interface or Ipv6Interface)
interface	interface id
useObjectNames	use node and device names instead of indexes