sese::internal::net::service::dns::DnsService Class Reference

DNS service. More...

#include <DnsService.h>

Inheritance diagram for sese::internal::net::service::dns::DnsService:

Public Member Functions
	DnsService ()
bool	bind (const sese::net::IPAddress::Ptr &address)
	Bind address.
void	setCallback (const sese::service::dns::Callback &callback)
	Set callback, the callback function precedes domain judgment logic, similar to a filter. The return value indicates whether further processing is needed.
void	addUpstreamNameServer (const sese::net::IPAddress::Ptr &address)
	Add upstream DNS server.
bool	addUpstreamNameServer (const std::string &ip, uint16_t port=53)
	Add upstream DNS server.
void	addRecord (const std::string &name, const sese::net::IPAddress::Ptr &address)
	Add record.
bool	startup () override
	Start service.
bool	shutdown () override
	Stop service.
int	getLastError () override
	Get error code.
std::string	getLastErrorMessage () override
	Get error message.
Public Member Functions inherited from sese::service::Service
	Service ()=default
virtual	~Service ()=default
ErrorCode	getErrorCode ()

Private Member Functions
void	handleBySelf (std::vector< sese::net::dns::DnsPackage::Question > &questions, sese::net::dns::DnsPackage::Ptr &send_package)
void	handleByUpstream (std::vector< sese::net::dns::DnsPackage::Question > &questions, sese::net::dns::DnsPackage::Ptr &send_package)
void	handle ()

Private Attributes
asio::io_service	io_service
asio::ip::udp::socket	socket
asio::error_code	error
std::array< uint8_t, 512 >	buffer
sese::net::dns::Resolver	resolver
Thread::Ptr	thread
std::atomic_bool	running
std::map< std::string, sese::net::IPv4Address::Ptr >	v4map
std::map< std::string, sese::net::IPv6Address::Ptr >	v6map
sese::service::dns::Callback	callback

Additional Inherited Members
Public Types inherited from sese::service::Service
using	Ptr = std::unique_ptr<Service>

Detailed Description

DNS service.

Constructor & Destructor Documentation

DnsService()

DnsService::DnsService

(

)

Member Function Documentation

addRecord()

void DnsService::addRecord	(	const std::string &	name,
		const sese::net::IPAddress::Ptr &	address )

Add record.

Parameters

name	Domain name
address	Address

References v4map, and v6map.

addUpstreamNameServer() [1/2]

void DnsService::addUpstreamNameServer

(

const sese::net::IPAddress::Ptr &

address

)

Add upstream DNS server.

Parameters

address

The address

References sese::net::dns::Resolver::addNameServer(), and resolver.

addUpstreamNameServer() [2/2]

bool DnsService::addUpstreamNameServer	(	const std::string &	ip,
		uint16_t	port = 53 )

Add upstream DNS server.

Parameters

ip	IP address
port	Port number

Returns

Whether the addition was successful, which depends on the format of the provided IP address

References sese::net::dns::Resolver::addNameServer(), and resolver.

bind()

bool DnsService::bind

(

const sese::net::IPAddress::Ptr &

address

)

Bind address.

Parameters

address

The address

Returns

Whether binding was successful

References sese::internal::net::convert(), error, and socket.

getLastError()

int DnsService::getLastError ( )

overridevirtual

Get error code.

Returns

Error code

Implements sese::service::Service.

References error.

getLastErrorMessage()

std::string DnsService::getLastErrorMessage ( )

overridevirtual

Get error message.

Returns

Error message

Implements sese::service::Service.

References error.

handle()

void DnsService::handle ( )

private

References buffer, callback, sese::internal::net::convert(), sese::net::dns::DnsPackage::decode(), error, handleBySelf(), handleByUpstream(), sese::net::dns::DnsPackage::new_(), running, and socket.

Referenced by startup().

handleBySelf()

void DnsService::handleBySelf ( std::vector< sese::net::dns::DnsPackage::Question > & questions, sese::net::dns::DnsPackage::Ptr & send_package )

private

References sese::net::dns::DnsPackage::Answer::class_, sese::net::dns::CLASS_IN, sese::net::dns::DnsPackage::Answer::data, sese::net::dns::DnsPackage::Answer::data_length, sese::net::dns::DnsPackage::Answer::name, sese::net::dns::DnsPackage::Answer::ttl, sese::net::dns::DnsPackage::Answer::type, sese::net::dns::TYPE_A, sese::net::dns::TYPE_AAAA, v4map, and v6map.

Referenced by handle().

handleByUpstream()

void DnsService::handleByUpstream ( std::vector< sese::net::dns::DnsPackage::Question > & questions, sese::net::dns::DnsPackage::Ptr & send_package )

private

References sese::net::dns::DnsPackage::Answer::class_, sese::net::dns::DnsPackage::Answer::data, sese::net::dns::DnsPackage::Answer::data_length, sese::net::dns::DnsPackage::Answer::name, sese::net::dns::Resolver::resolve(), resolver, sese::net::dns::DnsPackage::Answer::ttl, sese::net::dns::DnsPackage::Answer::type, v4map, and v6map.

Referenced by handle().

setCallback()

void DnsService::setCallback

(

const sese::service::dns::Callback &

callback

)

Set callback, the callback function precedes domain judgment logic, similar to a filter. The return value indicates whether further processing is needed.

Parameters

callback

The callback function

References callback.

shutdown()

bool DnsService::shutdown ( )

overridevirtual

Stop service.

Returns

Whether it was successful

Implements sese::service::Service.

References running, socket, and thread.

startup()

bool DnsService::startup ( )

overridevirtual

Start service.

Returns

Whether it was successful

Implements sese::service::Service.

References handle(), running, and thread.

Member Data Documentation

buffer

std::array<uint8_t, 512> sese::internal::net::service::dns::DnsService::buffer

private

Referenced by handle().

callback

sese::service::dns::Callback sese::internal::net::service::dns::DnsService::callback

private

Referenced by handle(), and setCallback().

error

asio::error_code sese::internal::net::service::dns::DnsService::error

private

Referenced by bind(), getLastError(), getLastErrorMessage(), and handle().

io_service

asio::io_service sese::internal::net::service::dns::DnsService::io_service

private

resolver

sese::net::dns::Resolver sese::internal::net::service::dns::DnsService::resolver

private

Referenced by addUpstreamNameServer(), addUpstreamNameServer(), and handleByUpstream().

running

std::atomic_bool sese::internal::net::service::dns::DnsService::running

private

Referenced by handle(), shutdown(), and startup().

socket

asio::ip::udp::socket sese::internal::net::service::dns::DnsService::socket

private

Referenced by bind(), handle(), and shutdown().

thread

Thread::Ptr sese::internal::net::service::dns::DnsService::thread

private

Referenced by shutdown(), and startup().

v4map

std::map<std::string, sese::net::IPv4Address::Ptr> sese::internal::net::service::dns::DnsService::v4map

private

Referenced by addRecord(), handleBySelf(), and handleByUpstream().

v6map

std::map<std::string, sese::net::IPv6Address::Ptr> sese::internal::net::service::dns::DnsService::v6map

private

Referenced by addRecord(), handleBySelf(), and handleByUpstream().

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

• sese/internal/service/dns/DnsService.h
• sese/internal/service/dns/DnsService.cpp