classic_protocol::Codec< message::client::Greeting > Class Reference

codec for client side greeting message. More...

#include <classic_protocol_codec_message.h>

Inheritance diagram for classic_protocol::Codec< message::client::Greeting >:

Public Types
using	value_type = message::client::Greeting
using	__base = impl::EncodeBase< Codec< value_type > >

Public Member Functions
	Codec (value_type v, capabilities::value_type caps)
Public Member Functions inherited from classic_protocol::impl::EncodeBase< Codec< message::client::Greeting > >
constexpr	EncodeBase (capabilities::value_type caps)
constexpr size_t	size () const noexcept
stdx::expected< size_t, std::error_code >	encode (const net::mutable_buffer &buffer) const
constexpr capabilities::value_type	caps () const noexcept

Static Public Member Functions
template<class ConstBufferSequence >
static stdx::expected< std::pair< size_t, value_type >, std::error_code >	decode (const ConstBufferSequence &buffers, capabilities::value_type caps)

Public Attributes
friend	__base

Private Member Functions
template<class Accumulator >
auto	accumulate_fields (Accumulator &&accu) const

Private Attributes
const value_type	v_

Detailed Description

codec for client side greeting message.

in 3.21 ... 4.0:

FixedInt<2>    capabilities [protocol_41 not set]
FixedInt<3>    max-allowed-packet
NulTermString  username
NulTermString  auth-method-data

[if not connect_with_schema, there may be no trailing Nul-byte]

if connect_with_schema {
  String         schema
}

the auth-method is "old_password" if "protocol_version == 10 && (capabilities & long_password)", it is "older_password" otherwise

FixedInt<2>    capabilities_lo [protocol_41 set]
FixedInt<2>    capabilities_hi
FixedInt<4>    max_allowed-packet
...

The capabilities that are part of the message are the client's capabilities (which may announce more than what the server supports). The codec uses the capabilities that are shared between client and server to decide which parts and how they are understood, though.

checked capabilities:

• protocol_41
• ssl
• client_auth_method_data_varint
• secure_connection
• connect_with_schema
• plugin_auth
• connect_attributes

Member Typedef Documentation

__base

using classic_protocol::Codec< message::client::Greeting >::__base = impl::EncodeBase<Codec<value_type> >

value_type

using classic_protocol::Codec< message::client::Greeting >::value_type = message::client::Greeting

Constructor & Destructor Documentation

Codec()

classic_protocol::Codec< message::client::Greeting >::Codec ( value_type  v, capabilities::value_type  caps  )

inline

Member Function Documentation

accumulate_fields()

template<class Accumulator >

auto classic_protocol::Codec< message::client::Greeting >::accumulate_fields ( Accumulator &&  accu ) const

inlineprivate

decode()

template<class ConstBufferSequence >

static stdx::expected< std::pair< size_t, value_type >, std::error_code > classic_protocol::Codec< message::client::Greeting >::decode ( const ConstBufferSequence &  buffers, capabilities::value_type  caps  )

inlinestatic

Member Data Documentation

__base

friend classic_protocol::Codec< message::client::Greeting >::__base

v_

const value_type classic_protocol::Codec< message::client::Greeting >::v_

private

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

• router/src/mysql_protocol/include/mysqlrouter/classic_protocol_codec_message.h