feat(Core/Common): add Asio network threading (#6063)

src/common/Asio/AsioHacksFwd.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef AsioHacksFwd_h__
+#define AsioHacksFwd_h__
+
+#include <boost/version.hpp>
+
+/**
+  Collection of forward declarations to improve compile time
+ */
+namespace boost::posix_time
+{
+    class ptime;
+}
+
+namespace boost::asio
+{
+    template <typename Time>
+    struct time_traits;
+}
+
+namespace boost::asio::ip
+{
+    class address;
+    class tcp;
+
+    template <typename InternetProtocol>
+    class basic_endpoint;
+
+    typedef basic_endpoint<tcp> tcp_endpoint;
+}
+
+namespace acore::Asio
+{
+    class DeadlineTimer;
+    class IoContext;
+    class Resolver;
+    class Strand;
+}
+
+#endif // AsioHacksFwd_h__

src/common/Asio/DeadlineTimer.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef DeadlineTimer_h__
+#define DeadlineTimer_h__
+
+#include <boost/asio/deadline_timer.hpp>
+
+#if BOOST_VERSION >= 107000
+#define BasicDeadlineTimerThirdTemplateArg , boost::asio::io_context::executor_type
+#elif BOOST_VERSION >= 106600
+#define BasicDeadlineTimerThirdTemplateArg
+#else
+#define BasicDeadlineTimerThirdTemplateArg , boost::asio::deadline_timer_service<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime>>
+#endif
+
+#define DeadlineTimerBase boost::asio::basic_deadline_timer<boost::posix_time::ptime, boost::asio::time_traits<boost::posix_time::ptime> BasicDeadlineTimerThirdTemplateArg>
+
+namespace acore::Asio
+{
+    class DeadlineTimer : public DeadlineTimerBase
+    {
+    public:
+        using DeadlineTimerBase::basic_deadline_timer;
+    };
+}
+
+#endif // DeadlineTimer_h__

src/common/Asio/IoContext.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef IoContext_h__
+#define IoContext_h__
+
+#include <boost/version.hpp>
+
+#if BOOST_VERSION >= 106600
+#include <boost/asio/io_context.hpp>
+#include <boost/asio/post.hpp>
+#define IoContextBaseNamespace boost::asio
+#define IoContextBase io_context
+#else
+#include <boost/asio/io_service.hpp>
+#define IoContextBaseNamespace boost::asio
+#define IoContextBase io_service
+#endif
+
+namespace acore::Asio
+{
+    class IoContext
+    {
+    public:
+        IoContext() : _impl() { }
+        explicit IoContext(int concurrency_hint) : _impl(concurrency_hint) { }
+
+        operator IoContextBaseNamespace::IoContextBase&() { return _impl; }
+        operator IoContextBaseNamespace::IoContextBase const&() const { return _impl; }
+
+        std::size_t run() { return _impl.run(); }
+        void stop() { _impl.stop(); }
+
+#if BOOST_VERSION >= 106600
+        boost::asio::io_context::executor_type get_executor() noexcept { return _impl.get_executor(); }
+#endif
+
+    private:
+        IoContextBaseNamespace::IoContextBase _impl;
+    };
+
+    template<typename T>
+    inline decltype(auto) post(IoContextBaseNamespace::IoContextBase& ioContext, T&& t)
+    {
+#if BOOST_VERSION >= 106600
+        return boost::asio::post(ioContext, std::forward<T>(t));
+#else
+        return ioContext.post(std::forward<T>(t));
+#endif
+    }
+
+    template<typename T>
+    inline decltype(auto) get_io_context(T&& ioObject)
+    {
+#if BOOST_VERSION >= 106600
+        return ioObject.get_executor().context();
+#else
+        return ioObject.get_io_service();
+#endif
+    }
+}
+
+#endif // IoContext_h__

src/common/Asio/IpAddress.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef IpAddress_h__
+#define IpAddress_h__
+
+#include "Define.h"
+#include <boost/asio/ip/address.hpp>
+
+namespace acore::Net
+{
+#if BOOST_VERSION >= 106600
+    using boost::asio::ip::make_address;
+    using boost::asio::ip::make_address_v4;
+    inline uint32 address_to_uint(boost::asio::ip::address_v4 const& address) { return address.to_uint(); }
+#else
+    inline boost::asio::ip::address make_address(char const* str) { return boost::asio::ip::address::from_string(str); }
+    inline boost::asio::ip::address make_address(char const* str, boost::system::error_code& ec) { return boost::asio::ip::address::from_string(str, ec); }
+    inline boost::asio::ip::address make_address(std::string const& str) { return boost::asio::ip::address::from_string(str); }
+    inline boost::asio::ip::address make_address(std::string const& str, boost::system::error_code& ec) { return boost::asio::ip::address::from_string(str, ec); }
+    inline boost::asio::ip::address_v4 make_address_v4(char const* str) { return boost::asio::ip::address_v4::from_string(str); }
+    inline boost::asio::ip::address_v4 make_address_v4(char const* str, boost::system::error_code& ec) { return boost::asio::ip::address_v4::from_string(str, ec); }
+    inline boost::asio::ip::address_v4 make_address_v4(std::string const& str) { return boost::asio::ip::address_v4::from_string(str); }
+    inline boost::asio::ip::address_v4 make_address_v4(std::string const& str, boost::system::error_code& ec) { return boost::asio::ip::address_v4::from_string(str, ec); }
+    inline uint32 address_to_uint(boost::asio::ip::address_v4 const& address) { return address.to_ulong(); }
+#endif
+}
+
+#endif // IpAddress_h__

src/common/Asio/IpNetwork.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef IpNetwork_h__
+#define IpNetwork_h__
+
+#include "Define.h"
+#include "IpAddress.h"
+#include <boost/version.hpp>
+
+#if BOOST_VERSION >= 106600
+#include <boost/asio/ip/network_v4.hpp>
+#include <boost/asio/ip/network_v6.hpp>
+#endif
+
+namespace acore::Net
+{
+    inline bool IsInNetwork(boost::asio::ip::address_v4 const& networkAddress, boost::asio::ip::address_v4 const& mask, boost::asio::ip::address_v4 const& clientAddress)
+    {
+#if BOOST_VERSION >= 106600
+        boost::asio::ip::network_v4 network = boost::asio::ip::make_network_v4(networkAddress, mask);
+        boost::asio::ip::address_v4_range hosts = network.hosts();
+        return hosts.find(clientAddress) != hosts.end();
+#else
+        return (clientAddress.to_ulong() & mask.to_ulong()) == (networkAddress.to_ulong() & mask.to_ulong());
+#endif
+    }
+
+    inline boost::asio::ip::address_v4 GetDefaultNetmaskV4(boost::asio::ip::address_v4 const& networkAddress)
+    {
+        if ((address_to_uint(networkAddress) & 0x80000000) == 0)
+            return boost::asio::ip::address_v4(0xFF000000);
+        if ((address_to_uint(networkAddress) & 0xC0000000) == 0x80000000)
+            return boost::asio::ip::address_v4(0xFFFF0000);
+        if ((address_to_uint(networkAddress) & 0xE0000000) == 0xC0000000)
+            return boost::asio::ip::address_v4(0xFFFFFF00);
+        return boost::asio::ip::address_v4(0xFFFFFFFF);
+    }
+
+    inline bool IsInNetwork(boost::asio::ip::address_v6 const& networkAddress, uint16 prefixLength, boost::asio::ip::address_v6 const& clientAddress)
+    {
+#if BOOST_VERSION >= 106600
+        boost::asio::ip::network_v6 network = boost::asio::ip::make_network_v6(networkAddress, prefixLength);
+        boost::asio::ip::address_v6_range hosts = network.hosts();
+        return hosts.find(clientAddress) != hosts.end();
+#else
+        (void)networkAddress;
+        (void)prefixLength;
+        (void)clientAddress;
+        return false;
+#endif
+    }
+}
+
+#endif // IpNetwork_h__

src/common/Asio/Resolver.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef Resolver_h__
+#define Resolver_h__
+
+#include "IoContext.h"
+#include "Optional.h"
+#include <boost/asio/ip/tcp.hpp>
+#include <string>
+
+namespace acore::Asio
+{
+    /**
+     Hack to make it possible to forward declare resolver (one of its template arguments is a typedef to something super long and using nested classes)
+    */
+    class Resolver
+    {
+    public:
+        explicit Resolver(IoContext& ioContext) : _impl(ioContext) { }
+
+        Optional<boost::asio::ip::tcp::endpoint> Resolve(boost::asio::ip::tcp const& protocol, std::string const& host, std::string const& service)
+        {
+            boost::system::error_code ec;
+#if BOOST_VERSION >= 106600
+            boost::asio::ip::resolver_base::flags flagsResolver = boost::asio::ip::resolver_base::all_matching;
+            boost::asio::ip::tcp::resolver::results_type results = _impl.resolve(protocol, host, service, flagsResolver, ec);
+            if (results.begin() == results.end() || ec)
+                return {};
+
+            return results.begin()->endpoint();
+#else
+            boost::asio::ip::resolver_query_base::flags flagsQuery = boost::asio::ip::tcp::resolver::query::all_matching;
+            boost::asio::ip::tcp::resolver::query query(std::move(protocol), std::move(host), std::move(service), flagsQuery);
+            boost::asio::ip::tcp::resolver::iterator itr = _impl.resolve(query, ec);
+            boost::asio::ip::tcp::resolver::iterator end;
+            if (itr == end || ec)
+                return {};
+
+            return itr->endpoint();
+#endif
+        }
+
+    private:
+        boost::asio::ip::tcp::resolver _impl;
+    };
+}
+
+#endif // Resolver_h__

src/common/Asio/Strand.h

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+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ * Copyright (C) 2021+ WarheadCore <https://github.com/WarheadCore>
+ */
+
+#ifndef Strand_h__
+#define Strand_h__
+
+#include "IoContext.h"
+#include <boost/asio/strand.hpp>
+
+#if BOOST_VERSION >= 106600
+#include <boost/asio/bind_executor.hpp>
+#endif
+
+namespace acore::Asio
+{
+    /**
+        Hack to make it possible to forward declare strand (which is a inner class)
+    */
+    class Strand : public IoContextBaseNamespace::IoContextBase::strand
+    {
+    public:
+        Strand(IoContext& ioContext) : IoContextBaseNamespace::IoContextBase::strand(ioContext) { }
+    };
+
+#if BOOST_VERSION >= 106600
+    using boost::asio::bind_executor;
+#else
+    template<typename T>
+    inline decltype(auto) bind_executor(Strand& strand, T&& t)
+    {
+        return strand.wrap(std::forward<T>(t));
+    }
+#endif
+}
+
+#endif // Strand_h__