#include <protocol_classic.h>

Inheritance diagram for Protocol_classic:

Public Member Functions
	Protocol_classic ()

	Protocol_classic (THD *thd)

void	init (THD *thd_arg)

bool	store_field (const Field *field) final

bool	store_string (const char from, size_t length, const CHARSET_INFO cs) final

int	read_packet () override
	Read packet from client. More...

int	get_command (COM_DATA com_data, enum_server_command cmd) override
	Reads the command from the protocol and creates a command. More...

bool	create_command (COM_DATA com_data, enum_server_command cmd, uchar pkt, size_t length)
	Parses the passed parameters and creates a command. More...

bool	flush () override
	Used for the classic protocol. More...

void	end_partial_result_set () override
	Finish the result set with EOF packet, as is expected by the client, if there is an error evaluating the next row and a continue handler for the error. More...

bool	end_row () override

uint	get_rw_status () override
	Returns the read/writing status. More...

bool	get_compression () override
	Returns if the protocol is compressed or not. More...

char *	get_compression_algorithm () override
	Returns compression algorithm name. More...

uint	get_compression_level () override
	Returns compression level. More...

bool	start_result_metadata (uint num_cols, uint flags, const CHARSET_INFO *resultcs) override
	Prepares the server for metadata sending. More...

bool	end_result_metadata () override
	Signals the client that the metadata sending is done. More...

bool	send_field_metadata (Send_field field, const CHARSET_INFO item_charset) override
	Sends a single column metadata. More...

void	abort_row () override

enum enum_vio_type	connection_type () const override
	Returns the type of the connection. More...

my_socket	get_socket ()

bool	init_net (Vio *vio)

void	claim_memory_ownership (bool claim)

void	end_net ()

bool	write (const uchar *ptr, size_t len)

uchar	get_error ()

void	set_max_packet_size (ulong max_packet_size)

int	shutdown (bool server_shutdown=false) override
	Thread is being shut down, disconnect and free resources. More...

void	wipe_net ()

bool	connection_alive () const override
	Checks if the protocol's connection with the client is still alive. More...

ulong	get_client_capabilities () override
	Returns the client capabilities stored on the protocol. More...

void	set_client_capabilities (ulong client_capabilities)

void	add_client_capability (ulong client_capability)

void	remove_client_capability (unsigned long capability)

bool	has_client_capability (unsigned long client_capability) override
	Checks if the client capabilities include the one specified as parameter. More...

NET *	get_net ()

Vio *	get_vio ()

const Vio *	get_vio () const

void	set_vio (Vio *vio)

void	set_output_pkt_nr (uint pkt_nr)

uint	get_output_pkt_nr ()

String *	get_output_packet ()

ulong	get_packet_length ()

uchar *	get_raw_packet ()

virtual void	set_read_timeout (ulong read_timeout, bool on_full_packet=false)

virtual void	set_write_timeout (ulong write_timeout)

void	set_result_character_set (const CHARSET_INFO *charset)
	Sets the character set expected by the client. More...

Public Member Functions inherited from Protocol
virtual	~Protocol ()=default

Protocol *	pop_protocol ()
	Remove the reference to the previous protocol and return it. More...

void	push_protocol (Protocol *protocol)
	Set reference to "this" as the previous protocol on the protocol provided as argument. More...

virtual enum enum_protocol_type	type () const =0

virtual bool	store_null ()=0

virtual bool	store_tiny (longlong from, uint32 zerofill)=0

virtual bool	store_short (longlong from, uint32 zerofill)=0

virtual bool	store_long (longlong from, uint32 zerofill)=0

virtual bool	store_longlong (longlong from, bool unsigned_flag, uint32 zerofill)=0

virtual bool	store_decimal (const my_decimal *, uint, uint)=0

virtual bool	store_float (float from, uint32 decimals, uint32 zerofill)=0

virtual bool	store_double (double from, uint32 decimals, uint32 zerofill)=0

virtual bool	store_datetime (const MYSQL_TIME &time, uint precision)=0

virtual bool	store_date (const MYSQL_TIME &time)=0

virtual bool	store_time (const MYSQL_TIME &time, uint precision)=0

bool	store (int from)

bool	store (uint32 from)

bool	store (longlong from)

bool	store (ulonglong from)

bool	store_tiny (longlong from)

bool	store_short (longlong from)

bool	store_long (longlong from)

bool	store_longlong (longlong from, bool unsigned_flag)

bool	store (const char from, const CHARSET_INFO fromcs)
	Send \0 end terminated string. More...

bool	store (String *str)

bool	store (const LEX_STRING &s, const CHARSET_INFO *cs)

virtual void	start_row ()=0
	Result set sending functions. More...

virtual bool	send_parameters (List< Item_param > *parameters, bool is_sql_prepare)=0
	Sends the OUT-parameters to the client. More...

Public Attributes
bool	bad_packet

Protected Member Functions
bool	send_ok (uint server_status, uint statement_warn_count, ulonglong affected_rows, ulonglong last_insert_id, const char *message) override
	A default implementation of "OK" packet response to the client. More...

bool	send_eof (uint server_status, uint statement_warn_count) override
	A default implementation of "EOF" packet response to the client. More...

bool	send_error (uint sql_errno, const char err_msg, const char sql_state) override
	A default implementation of "ERROR" packet response to the client. More...

bool	store_ps_status (ulong stmt_id, uint column_count, uint param_count, ulong cond_count) override
	Sends prepared statement's id and metadata to the client after prepare. More...

Protected Attributes
THD *	m_thd

String *	packet

String	convert

uint	field_pos

bool	send_metadata

enum enum_field_types *	field_types

uint	count

uint	field_count

uint	sending_flags

ulong	input_packet_length

uchar *	input_raw_packet

const CHARSET_INFO *	result_cs

Private Member Functions
bool	parse_packet (union COM_DATA *data, enum_server_command cmd)

bool	net_store_data_with_conversion (const uchar from, size_t length, const CHARSET_INFO fromcs, const CHARSET_INFO *tocs)
	net_store_data() - extended version with character set conversion. More...

Private Attributes
ulong	m_client_capabilities

Additional Inherited Members
Public Types inherited from Protocol
enum	enum_protocol_type { PROTOCOL_TEXT = 0 , PROTOCOL_BINARY = 1 , PROTOCOL_LOCAL = 2 , PROTOCOL_ERROR = 3 , PROTOCOL_PLUGIN = 4 }
	Enum used by type() to specify the protocol type. More...

enum	{ SEND_NUM_ROWS = 1 , SEND_DEFAULTS = 2 , SEND_EOF = 4 }
	Flags available to alter the way the messages are sent to the client. More...

using	Type = BaseProtocol::Type

Static Public Member Functions inherited from Protocol
static Type	get_default ()

static Type	get_by_name (const std::string &name)
	Returns type of the protocol by its name. More...

static std::string	to_string (const Type &type)

static uint16_t	get_default_port (Type type)
	Returns default port for the selected protocol. More...

Constructor & Destructor Documentation

◆ Protocol_classic() [1/2]

Protocol_classic::Protocol_classic ( )

inline

◆ Protocol_classic() [2/2]

Protocol_classic::Protocol_classic ( THD * thd )

inline

Member Function Documentation

◆ abort_row()

void Protocol_classic::abort_row ( )

inlineoverridevirtual

Implements Protocol.

◆ add_client_capability()

void Protocol_classic::add_client_capability ( ulong client_capability )

inline

◆ claim_memory_ownership()

void Protocol_classic::claim_memory_ownership ( bool claim )

◆ connection_alive()

bool Protocol_classic::connection_alive ( ) const

overridevirtual

Checks if the protocol's connection with the client is still alive.

It should always return true unless the protocol closed the connection.

Return values

true	if the connection is still alive
false	otherwise

Implements Protocol.

◆ connection_type()

enum enum_vio_type Protocol_classic::connection_type ( ) const

inlineoverridevirtual

Returns the type of the connection.

Returns: enum enum_vio_type

Implements Protocol.

◆ create_command()

bool Protocol_classic::create_command	(	COM_DATA *	com_data,
		enum_server_command	cmd,
		uchar *	pkt,
		size_t	length
	)

Parses the passed parameters and creates a command.

Parameters

com_data	out parameter
cmd	in parameter
pkt	packet to be parsed
length	size of the packet

Return values

false	ok
true	error

◆ end_net()

void Protocol_classic::end_net ( )

◆ end_partial_result_set()

void Protocol_classic::end_partial_result_set ( )

overridevirtual

Finish the result set with EOF packet, as is expected by the client, if there is an error evaluating the next row and a continue handler for the error.

Implements Protocol.

◆ end_result_metadata()

bool Protocol_classic::end_result_metadata ( )

overridevirtual

Signals the client that the metadata sending is done.

Clears the server after sending the metadata.

Return values

false	Ok
true	An error occurred

Implements Protocol.

◆ end_row()

bool Protocol_classic::end_row ( )

overridevirtual

Implements Protocol.

◆ flush()

bool Protocol_classic::flush ( )

overridevirtual

Used for the classic protocol.

Makes the protocol send the messages/data to the client.

Return values

false	The flush was successful.
true	An error occurred.

Implements Protocol.

◆ get_client_capabilities()

ulong Protocol_classic::get_client_capabilities ( )

inlineoverridevirtual

Returns the client capabilities stored on the protocol.

The available capabilities are defined in mysql_com.h

Implements Protocol.

◆ get_command()

int Protocol_classic::get_command	(	COM_DATA *	com_data,
		enum_server_command *	cmd
	)

overridevirtual

Reads the command from the protocol and creates a command.

Parameters

com_data	out parameter
cmd	out parameter

Returns: -1 fatal protocol error 0 ok 1 non-fatal protocol or parsing error

Implements Protocol.

◆ get_compression()

bool Protocol_classic::get_compression ( )

overridevirtual

Returns if the protocol is compressed or not.

Return values

false	Not compressed
true	Compressed

Implements Protocol.

◆ get_compression_algorithm()

char * Protocol_classic::get_compression_algorithm ( )

overridevirtual

Returns compression algorithm name.

Return values

string	compression method name
NULL	if no compression is enabled

Implements Protocol.

◆ get_compression_level()

uint Protocol_classic::get_compression_level ( )

overridevirtual

Returns compression level.

Returns: compression level

Implements Protocol.

◆ get_error()

uchar Protocol_classic::get_error ( )

◆ get_net()

NET * Protocol_classic::get_net ( )

◆ get_output_packet()

String * Protocol_classic::get_output_packet ( )

◆ get_output_pkt_nr()

uint Protocol_classic::get_output_pkt_nr ( )

◆ get_packet_length()

ulong Protocol_classic::get_packet_length ( )

inline

◆ get_raw_packet()

uchar * Protocol_classic::get_raw_packet ( )

inline

◆ get_rw_status()

uint Protocol_classic::get_rw_status ( )

overridevirtual

Returns the read/writing status.

Return values

1	Read
2	Write
0	Other(Idle, Killed)

Implements Protocol.

◆ get_socket()

my_socket Protocol_classic::get_socket ( )

Returns: : the file descriptor of the socket.

◆ get_vio() [1/2]

Vio * Protocol_classic::get_vio ( )

◆ get_vio() [2/2]

const Vio * Protocol_classic::get_vio ( ) const

◆ has_client_capability()

bool Protocol_classic::has_client_capability ( unsigned long client_capability )

inlineoverridevirtual

Checks if the client capabilities include the one specified as parameter.

Return values

true	if it includes the specified capability
false	otherwise

Implements Protocol.

◆ init()

void Protocol_classic::init ( THD * thd_arg )

◆ init_net()

bool Protocol_classic::init_net ( Vio * vio )

◆ net_store_data_with_conversion()

bool Protocol_classic::net_store_data_with_conversion	(	const uchar *	from,
		size_t	length,
		const CHARSET_INFO *	from_cs,
		const CHARSET_INFO *	to_cs
	)

private

net_store_data() - extended version with character set conversion.

It is optimized for short strings whose length after conversion is guaranteed to be less than 251, which occupies exactly one byte to store length. It allows not to use the "convert" member as a temporary buffer, conversion is done directly to the "packet" member. The limit 251 is good enough to optimize send_result_set_metadata() because column, table, database names fit into this limit.

◆ parse_packet()

bool Protocol_classic::parse_packet	(	union COM_DATA *	data,
		enum_server_command	cmd
	)

private

◆ read_packet()

int Protocol_classic::read_packet ( )

overridevirtual

Read packet from client.

Return values

-1	fatal error
0	ok
1	non-fatal error

Implements Protocol.

◆ remove_client_capability()

void Protocol_classic::remove_client_capability ( unsigned long capability )

inline

◆ send_eof()

bool Protocol_classic::send_eof	(	uint	server_status,
		uint	statement_warn_count
	)

overrideprotectedvirtual

A default implementation of "EOF" packet response to the client.

Binary and text protocol do not differ in their EOF packet format.

Implements Protocol.

◆ send_error()

bool Protocol_classic::send_error	(	uint	sql_errno,
		const char *	err_msg,
		const char *	sql_state
	)

overrideprotectedvirtual

A default implementation of "ERROR" packet response to the client.

Binary and text protocol do not differ in ERROR packet format.

Implements Protocol.

◆ send_field_metadata()

bool Protocol_classic::send_field_metadata	(	Send_field *	field,
		const CHARSET_INFO *	item_charset
	)

overridevirtual

Sends a single column metadata.

Parameters

field	Field description
item_charset	Character set to use

Return values

false	success
true	error

See Column Definition for the format

Implements Protocol.

◆ send_ok()

bool Protocol_classic::send_ok	(	uint	server_status,
		uint	statement_warn_count,
		ulonglong	affected_rows,
		ulonglong	last_insert_id,
		const char *	message
	)

overrideprotectedvirtual

A default implementation of "OK" packet response to the client.

Currently this implementation is re-used by both network-oriented protocols – the binary and text one. They do not differ in their OK packet format, which allows for a significant simplification on client side.

Implements Protocol.

◆ set_client_capabilities()

void Protocol_classic::set_client_capabilities ( ulong client_capabilities )

inline

◆ set_max_packet_size()

void Protocol_classic::set_max_packet_size ( ulong max_packet_size )

◆ set_output_pkt_nr()

void Protocol_classic::set_output_pkt_nr ( uint pkt_nr )

◆ set_read_timeout()

void Protocol_classic::set_read_timeout	(	ulong	read_timeout,
		bool	on_full_packet = `false`
	)

virtual

◆ set_result_character_set()

void Protocol_classic::set_result_character_set ( const CHARSET_INFO * charset )

inline

Sets the character set expected by the client.

This function is for unit tests. It should usually be set by calling start_result_metadata().

◆ set_vio()

void Protocol_classic::set_vio ( Vio * vio )

◆ set_write_timeout()

void Protocol_classic::set_write_timeout ( ulong write_timeout )

virtual

◆ shutdown()

int Protocol_classic::shutdown ( bool server_shutdown = false )

overridevirtual

Thread is being shut down, disconnect and free resources.

Parameters

server_shutdown If false then this is normal thread shutdown. If true then the server is shutting down.

Implements Protocol.

◆ start_result_metadata()

bool Protocol_classic::start_result_metadata	(	uint	num_cols,
		uint	flags,
		const CHARSET_INFO *	resultcs
	)

overridevirtual

Prepares the server for metadata sending.

Notifies the client that the metadata sending will start.

Parameters

num_cols	Number of columns that will be sent
flags	Flags to alter the metadata sending Can be any of the following: SEND_NUM_ROWS, SEND_DEFAULTS, SEND_EOF
resultcs	Charset to convert to

Return values

false	Ok
true	An error occurred

Implements Protocol.

Reimplemented in Protocol_binary.

◆ store_field()

bool Protocol_classic::store_field ( const Field * field )

finalvirtual

Implements Protocol.

◆ store_ps_status()

bool Protocol_classic::store_ps_status	(	ulong	stmt_id,
		uint	column_count,
		uint	param_count,
		ulong	cond_count
	)

overrideprotectedvirtual

Sends prepared statement's id and metadata to the client after prepare.

Parameters

stmt_id	Statement id.
column_count	Number of columns.
param_count	Number of parameters.
cond_count	Number of conditions raised by the current statement.

Returns: Error status.

Return values

false	The send was successful.
true	An error occurred.

Implements Protocol.

◆ store_string()

bool Protocol_classic::store_string	(	const char *	from,
		size_t	length,
		const CHARSET_INFO *	cs
	)

finalvirtual

Implements Protocol.

◆ wipe_net()

void Protocol_classic::wipe_net ( )

◆ write()

bool Protocol_classic::write	(	const uchar *	ptr,
		size_t	len
	)

Member Data Documentation

◆ bad_packet

bool Protocol_classic::bad_packet

◆ convert

String Protocol_classic::convert

protected

◆ count

uint Protocol_classic::count

protected

◆ field_count

uint Protocol_classic::field_count

protected

◆ field_pos

uint Protocol_classic::field_pos

protected

◆ field_types

enum enum_field_types* Protocol_classic::field_types

protected

◆ input_packet_length

ulong Protocol_classic::input_packet_length

protected

◆ input_raw_packet

uchar* Protocol_classic::input_raw_packet

protected

◆ m_client_capabilities

ulong Protocol_classic::m_client_capabilities

private

◆ m_thd

THD* Protocol_classic::m_thd

protected

◆ packet

String* Protocol_classic::packet

protected

◆ result_cs

const CHARSET_INFO* Protocol_classic::result_cs

protected

◆ send_metadata

bool Protocol_classic::send_metadata

protected

◆ sending_flags

uint Protocol_classic::sending_flags

protected

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

sql/protocol_classic.h
sql/protocol_classic.cc

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ Protocol_classic() [1/2]

◆ Protocol_classic() [2/2]

Member Function Documentation

◆ abort_row()

◆ add_client_capability()

◆ claim_memory_ownership()

◆ connection_alive()

◆ connection_type()

◆ create_command()

◆ end_net()

◆ end_partial_result_set()

◆ end_result_metadata()

◆ end_row()

◆ flush()

◆ get_client_capabilities()

◆ get_command()

◆ get_compression()

◆ get_compression_algorithm()

◆ get_compression_level()

◆ get_error()

◆ get_net()

◆ get_output_packet()

◆ get_output_pkt_nr()

◆ get_packet_length()

◆ get_raw_packet()

◆ get_rw_status()

◆ get_socket()

◆ get_vio() [1/2]

◆ get_vio() [2/2]

◆ has_client_capability()

◆ init()

◆ init_net()

◆ net_store_data_with_conversion()

◆ parse_packet()

◆ read_packet()

◆ remove_client_capability()

◆ send_eof()

◆ send_error()

◆ send_field_metadata()

◆ send_ok()

◆ set_client_capabilities()

◆ set_max_packet_size()

◆ set_output_pkt_nr()

◆ set_read_timeout()

◆ set_result_character_set()

◆ set_vio()

◆ set_write_timeout()

◆ shutdown()

◆ start_result_metadata()

◆ store_field()

◆ store_ps_status()

◆ store_string()

◆ wipe_net()

◆ write()

Member Data Documentation

◆ bad_packet

◆ convert

◆ count

◆ field_count

◆ field_pos

◆ field_types

◆ input_packet_length

◆ input_raw_packet

◆ m_client_capabilities

◆ m_thd

◆ packet

◆ result_cs

◆ send_metadata

◆ sending_flags