web::dosguard::DOSGuard Class Reference

A simple denial of service guard used for rate limiting. More...

#include <DOSGuard.hpp>

Inheritance diagram for web::dosguard::DOSGuard:

Collaboration diagram for web::dosguard::DOSGuard:

Public Member Functions
	DOSGuard (util::config::ClioConfigDefinition const &config, WhitelistHandlerInterface const &whitelistHandler)
	Constructs a new DOS guard.
bool	isWhiteListed (std::string_view const ip) const noexcept override
	Check whether an ip address is in the whitelist or not.
bool	isOk (std::string const &ip) const noexcept override
	Check whether an ip address is currently rate limited or not.
void	increment (std::string const &ip) noexcept override
	Increment connection count for the given ip address.
void	decrement (std::string const &ip) noexcept override
	Decrement connection count for the given ip address.
bool	add (std::string const &ip, uint32_t numObjects) noexcept override
	Adds numObjects of usage for the given ip address.
bool	request (std::string const &ip) noexcept override
	Adds one request for the given ip address.
void	clear () noexcept override
	Instantly clears all fetch counters added by.
Public Member Functions inherited from web::dosguard::DOSGuardInterface
Public Member Functions inherited from web::dosguard::BaseDOSGuard

Detailed Description

A simple denial of service guard used for rate limiting.

Template Parameters

WhitelistHandlerType

The type of the whitelist handler

Constructor & Destructor Documentation

DOSGuard()

web::dosguard::DOSGuard::DOSGuard	(	util::config::ClioConfigDefinition const &	config,
		WhitelistHandlerInterface const &	whitelistHandler )

Constructs a new DOS guard.

Parameters

config	Clio config
whitelistHandler	Whitelist handler that checks whitelist for IP addresses

Member Function Documentation

add()

bool web::dosguard::DOSGuard::add ( std::string const & ip, uint32_t numObjects )

overridevirtualnoexcept

Adds numObjects of usage for the given ip address.

If the total sums up to a value equal or larger than maxFetches_ the operation is no longer allowed and false is returned; true is returned otherwise.

Parameters

ip
numObjects

Returns

true

false

Implements web::dosguard::DOSGuardInterface.

clear()

void web::dosguard::DOSGuard::clear ( )

overridevirtualnoexcept

Instantly clears all fetch counters added by.

See also

add(std::string const&, uint32_t).

Implements web::dosguard::BaseDOSGuard.

decrement()

void web::dosguard::DOSGuard::decrement ( std::string const & ip )

overridevirtualnoexcept

Decrement connection count for the given ip address.

Parameters

ip

Implements web::dosguard::DOSGuardInterface.

increment()

void web::dosguard::DOSGuard::increment ( std::string const & ip )

overridevirtualnoexcept

Increment connection count for the given ip address.

Parameters

ip

Implements web::dosguard::DOSGuardInterface.

isOk()

bool web::dosguard::DOSGuard::isOk ( std::string const & ip ) const

nodiscardoverridevirtualnoexcept

Check whether an ip address is currently rate limited or not.

Parameters

ip	The ip address to check

Returns

true If not rate limited

false If rate limited and the request should not be processed

Implements web::dosguard::DOSGuardInterface.

isWhiteListed()

bool web::dosguard::DOSGuard::isWhiteListed ( std::string_view const ip ) const

nodiscardoverridevirtualnoexcept

Check whether an ip address is in the whitelist or not.

Parameters

ip	The ip address to check

Returns

true

false

Implements web::dosguard::DOSGuardInterface.

request()

bool web::dosguard::DOSGuard::request ( std::string const & ip )

overridevirtualnoexcept

Adds one request for the given ip address.

If the total sums up to a value equal or larger than maxRequestCount_ the operation is no longer allowed and false is returned; true is returned otherwise.

Parameters

ip

Returns

true

false

Implements web::dosguard::DOSGuardInterface.

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

• /__w/clio/clio/src/web/dosguard/DOSGuard.hpp
• /__w/clio/clio/src/web/dosguard/DOSGuard.cpp