CMessageHeader Class Reference

Message header. More...

#include <protocol.h>

Public Types
typedef std::array< uint8_t, MESSAGE_START_SIZE >	MessageMagic

Public Member Functions
	CMessageHeader (const MessageMagic &pchMessageStartIn)
	CMessageHeader (const MessageMagic &pchMessageStartIn, const char *pszCommand, unsigned int nMessageSizeIn)
	Construct a P2P message header from message-start characters, a command and the size of the message.
std::string	GetCommand () const
bool	IsValid (const Config &config) const
bool	IsValidWithoutConfig (const MessageMagic &magic) const
	This is a transition method in order to stay compatible with older code that do not use the config.
bool	IsOversized (const Config &config) const
	SERIALIZE_METHODS (CMessageHeader, obj)

Public Attributes
MessageMagic	pchMessageStart
std::array< char, COMMAND_SIZE >	pchCommand
uint32_t	nMessageSize
uint8_t	pchChecksum [CHECKSUM_SIZE]

Static Public Attributes
static constexpr size_t	MESSAGE_START_SIZE = 4
static constexpr size_t	COMMAND_SIZE = 12
static constexpr size_t	MESSAGE_SIZE_SIZE = 4
static constexpr size_t	CHECKSUM_SIZE = 4
static constexpr size_t	MESSAGE_SIZE_OFFSET
static constexpr size_t	CHECKSUM_OFFSET
static constexpr size_t	HEADER_SIZE

Detailed Description

Message header.

(4) message start. (12) command. (4) size. (4) checksum.

Definition at line 34 of file protocol.h.

Member Typedef Documentation

MessageMagic

typedef std::array<uint8_t, MESSAGE_START_SIZE> CMessageHeader::MessageMagic

Definition at line 46 of file protocol.h.

Constructor & Destructor Documentation

CMessageHeader() [1/2]

CMessageHeader::CMessageHeader ( const MessageMagic &  pchMessageStartIn )

explicit

Definition at line 91 of file protocol.cpp.

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CMessageHeader() [2/2]

CMessageHeader::CMessageHeader	(	const MessageMagic &	pchMessageStartIn,
		const char *	pszCommand,
		unsigned int	nMessageSizeIn
	)

Construct a P2P message header from message-start characters, a command and the size of the message.

Note

Passing in a pszCommand longer than COMMAND_SIZE will result in a run-time assertion error.

Definition at line 99 of file protocol.cpp.

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Member Function Documentation

GetCommand()

std::string CMessageHeader::GetCommand

(

)

const

Definition at line 119 of file protocol.cpp.

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IsOversized()

bool CMessageHeader::IsOversized

(

const Config &

config

)

const

Definition at line 194 of file protocol.cpp.

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IsValid()

bool CMessageHeader::IsValid

(

const Config &

config

)

const

Definition at line 153 of file protocol.cpp.

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IsValidWithoutConfig()

bool CMessageHeader::IsValidWithoutConfig

(

const MessageMagic &

magic

)

const

This is a transition method in order to stay compatible with older code that do not use the config.

It assumes message will not get too large. This cannot be used for any piece of code that will download blocks as blocks may be bigger than the permitted size. Idealy, code that uses this function should be migrated toward using the config.

Definition at line 177 of file protocol.cpp.

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SERIALIZE_METHODS()

CMessageHeader::SERIALIZE_METHODS ( CMessageHeader  , obj    )

inline

Definition at line 64 of file protocol.h.

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Member Data Documentation

CHECKSUM_OFFSET

constexpr size_t CMessageHeader::CHECKSUM_OFFSET

staticconstexpr

Initial value:

=
        MESSAGE_SIZE_OFFSET + MESSAGE_SIZE_SIZE

Definition at line 42 of file protocol.h.

CHECKSUM_SIZE

constexpr size_t CMessageHeader::CHECKSUM_SIZE = 4

staticconstexpr

Definition at line 39 of file protocol.h.

COMMAND_SIZE

constexpr size_t CMessageHeader::COMMAND_SIZE = 12

staticconstexpr

Definition at line 37 of file protocol.h.

HEADER_SIZE

constexpr size_t CMessageHeader::HEADER_SIZE

staticconstexpr

Initial value:

=
        MESSAGE_START_SIZE + COMMAND_SIZE + MESSAGE_SIZE_SIZE + CHECKSUM_SIZE

Definition at line 44 of file protocol.h.

MESSAGE_SIZE_OFFSET

constexpr size_t CMessageHeader::MESSAGE_SIZE_OFFSET

staticconstexpr

Initial value:

=
        MESSAGE_START_SIZE + COMMAND_SIZE

Definition at line 40 of file protocol.h.

MESSAGE_SIZE_SIZE

constexpr size_t CMessageHeader::MESSAGE_SIZE_SIZE = 4

staticconstexpr

Definition at line 38 of file protocol.h.

MESSAGE_START_SIZE

constexpr size_t CMessageHeader::MESSAGE_START_SIZE = 4

staticconstexpr

Definition at line 36 of file protocol.h.

nMessageSize

uint32_t CMessageHeader::nMessageSize

Definition at line 71 of file protocol.h.

pchChecksum

uint8_t CMessageHeader::pchChecksum[CHECKSUM_SIZE]

Definition at line 72 of file protocol.h.

pchCommand

std::array<char, COMMAND_SIZE> CMessageHeader::pchCommand

Definition at line 70 of file protocol.h.

pchMessageStart

MessageMagic CMessageHeader::pchMessageStart

Definition at line 69 of file protocol.h.

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The documentation for this class was generated from the following files:

• src/protocol.h
• src/protocol.cpp