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monero/contrib/epee/include/net/net_utils_base.h
moneromooo-monero 55c7fb87a9
epee: adaptive connection timeout system 
a connection's timeout is halved for every extra connection
from the same host.

Also keep track of when we don't need to use a connection
anymore, so we can close it and free the resource for another
connection.

Also use the longer timeout for non routable local addresses.
2018-06-10 19:39:38 +01:00

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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#ifndef _NET_UTILS_BASE_H_
#define _NET_UTILS_BASE_H_
#include <boost/uuid/uuid.hpp>
#include <boost/asio/io_service.hpp>
#include <typeinfo>
#include <type_traits>
#include "serialization/keyvalue_serialization.h"
#include "misc_log_ex.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
#ifndef MAKE_IP
#define MAKE_IP( a1, a2, a3, a4 ) (a1|(a2<<8)|(a3<<16)|(a4<<24))
#endif
namespace epee
{
namespace net_utils
{
class ipv4_network_address
{
uint32_t m_ip;
uint16_t m_port;
public:
constexpr ipv4_network_address(uint32_t ip, uint16_t port) noexcept
: m_ip(ip), m_port(port) {}
bool equal(const ipv4_network_address& other) const noexcept;
bool less(const ipv4_network_address& other) const noexcept;
constexpr bool is_same_host(const ipv4_network_address& other) const noexcept
{ return ip() == other.ip(); }
constexpr uint32_t ip() const noexcept { return m_ip; }
constexpr uint16_t port() const noexcept { return m_port; }
std::string str() const;
std::string host_str() const;
bool is_loopback() const;
bool is_local() const;
static constexpr uint8_t get_type_id() noexcept { return ID; }
static const uint8_t ID = 1;
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(m_ip)
KV_SERIALIZE(m_port)
END_KV_SERIALIZE_MAP()
};
inline bool operator==(const ipv4_network_address& lhs, const ipv4_network_address& rhs) noexcept
{ return lhs.equal(rhs); }
inline bool operator!=(const ipv4_network_address& lhs, const ipv4_network_address& rhs) noexcept
{ return !lhs.equal(rhs); }
inline bool operator<(const ipv4_network_address& lhs, const ipv4_network_address& rhs) noexcept
{ return lhs.less(rhs); }
inline bool operator<=(const ipv4_network_address& lhs, const ipv4_network_address& rhs) noexcept
{ return !rhs.less(lhs); }
inline bool operator>(const ipv4_network_address& lhs, const ipv4_network_address& rhs) noexcept
{ return rhs.less(lhs); }
inline bool operator>=(const ipv4_network_address& lhs, const ipv4_network_address& rhs) noexcept
{ return !lhs.less(rhs); }
class network_address
{
struct interface
{
virtual ~interface() {};
virtual bool equal(const interface&) const = 0;
virtual bool less(const interface&) const = 0;
virtual bool is_same_host(const interface&) const = 0;
virtual std::string str() const = 0;
virtual std::string host_str() const = 0;
virtual bool is_loopback() const = 0;
virtual bool is_local() const = 0;
virtual uint8_t get_type_id() const = 0;
};
template<typename T>
struct implementation final : interface
{
T value;
implementation(const T& src) : value(src) {}
~implementation() = default;
// Type-checks for cast are done in cpp
static const T& cast(const interface& src) noexcept
{ return static_cast<const implementation<T>&>(src).value; }
virtual bool equal(const interface& other) const override
{ return value.equal(cast(other)); }
virtual bool less(const interface& other) const override
{ return value.less(cast(other)); }
virtual bool is_same_host(const interface& other) const override
{ return value.is_same_host(cast(other)); }
virtual std::string str() const override { return value.str(); }
virtual std::string host_str() const override { return value.host_str(); }
virtual bool is_loopback() const override { return value.is_loopback(); }
virtual bool is_local() const override { return value.is_local(); }
virtual uint8_t get_type_id() const override { return value.get_type_id(); }
};
std::shared_ptr<interface> self;
template<typename Type>
Type& as_mutable() const
{
// types `implmentation<Type>` and `implementation<const Type>` are unique
using Type_ = typename std::remove_const<Type>::type;
network_address::interface* const self_ = self.get(); // avoid clang warning in typeid
if (!self_ || typeid(implementation<Type_>) != typeid(*self_))
throw std::bad_cast{};
return static_cast<implementation<Type_>*>(self_)->value;
}
public:
network_address() : self(nullptr) {}
template<typename T>
network_address(const T& src)
: self(std::make_shared<implementation<T>>(src)) {}
bool equal(const network_address &other) const;
bool less(const network_address &other) const;
bool is_same_host(const network_address &other) const;
std::string str() const { return self ? self->str() : "<none>"; }
std::string host_str() const { return self ? self->host_str() : "<none>"; }
bool is_loopback() const { return self ? self->is_loopback() : false; }
bool is_local() const { return self ? self->is_local() : false; }
uint8_t get_type_id() const { return self ? self->get_type_id() : 0; }
template<typename Type> const Type &as() const { return as_mutable<const Type>(); }
BEGIN_KV_SERIALIZE_MAP()
uint8_t type = is_store ? this_ref.get_type_id() : 0;
if (!epee::serialization::selector<is_store>::serialize(type, stg, hparent_section, "type"))
return false;
switch (type)
{
case ipv4_network_address::ID:
{
if (!is_store)
{
const_cast<network_address&>(this_ref) = ipv4_network_address{0, 0};
auto &addr = this_ref.template as_mutable<ipv4_network_address>();
if (epee::serialization::selector<is_store>::serialize(addr, stg, hparent_section, "addr"))
MDEBUG("Found as addr: " << this_ref.str());
else if (epee::serialization::selector<is_store>::serialize(addr, stg, hparent_section, "template as<ipv4_network_address>()"))
MDEBUG("Found as template as<ipv4_network_address>(): " << this_ref.str());
else if (epee::serialization::selector<is_store>::serialize(addr, stg, hparent_section, "template as_mutable<ipv4_network_address>()"))
MDEBUG("Found as template as_mutable<ipv4_network_address>(): " << this_ref.str());
else
{
MWARNING("Address not found");
return false;
}
}
else
{
auto &addr = this_ref.template as_mutable<ipv4_network_address>();
if (!epee::serialization::selector<is_store>::serialize(addr, stg, hparent_section, "addr"))
return false;
}
break;
}
default: MERROR("Unsupported network address type: " << (unsigned)type); return false;
}
END_KV_SERIALIZE_MAP()
};
inline bool operator==(const network_address& lhs, const network_address& rhs)
{ return lhs.equal(rhs); }
inline bool operator!=(const network_address& lhs, const network_address& rhs)
{ return !lhs.equal(rhs); }
inline bool operator<(const network_address& lhs, const network_address& rhs)
{ return lhs.less(rhs); }
inline bool operator<=(const network_address& lhs, const network_address& rhs)
{ return !rhs.less(lhs); }
inline bool operator>(const network_address& lhs, const network_address& rhs)
{ return rhs.less(lhs); }
inline bool operator>=(const network_address& lhs, const network_address& rhs)
{ return !lhs.less(rhs); }
bool create_network_address(network_address &address, const std::string &string, uint16_t default_port = 0);
/************************************************************************/
/* */
/************************************************************************/
struct connection_context_base
{
const boost::uuids::uuid m_connection_id;
const network_address m_remote_address;
const bool m_is_income;
const time_t m_started;
time_t m_last_recv;
time_t m_last_send;
uint64_t m_recv_cnt;
uint64_t m_send_cnt;
double m_current_speed_down;
double m_current_speed_up;
connection_context_base(boost::uuids::uuid connection_id,
const network_address &remote_address, bool is_income,
time_t last_recv = 0, time_t last_send = 0,
uint64_t recv_cnt = 0, uint64_t send_cnt = 0):
m_connection_id(connection_id),
m_remote_address(remote_address),
m_is_income(is_income),
m_started(time(NULL)),
m_last_recv(last_recv),
m_last_send(last_send),
m_recv_cnt(recv_cnt),
m_send_cnt(send_cnt),
m_current_speed_down(0),
m_current_speed_up(0)
{}
connection_context_base(): m_connection_id(),
m_remote_address(ipv4_network_address{0,0}),
m_is_income(false),
m_started(time(NULL)),
m_last_recv(0),
m_last_send(0),
m_recv_cnt(0),
m_send_cnt(0),
m_current_speed_down(0),
m_current_speed_up(0)
{}
connection_context_base& operator=(const connection_context_base& a)
{
set_details(a.m_connection_id, a.m_remote_address, a.m_is_income);
return *this;
}
private:
template<class t_protocol_handler>
friend class connection;
void set_details(boost::uuids::uuid connection_id, const network_address &remote_address, bool is_income)
{
this->~connection_context_base();
new(this) connection_context_base(connection_id, remote_address, is_income);
}
};
/************************************************************************/
/* */
/************************************************************************/
struct i_service_endpoint
{
virtual bool do_send(const void* ptr, size_t cb)=0;
virtual bool close()=0;
virtual bool send_done()=0;
virtual bool call_run_once_service_io()=0;
virtual bool request_callback()=0;
virtual boost::asio::io_service& get_io_service()=0;
//protect from deletion connection object(with protocol instance) during external call "invoke"
virtual bool add_ref()=0;
virtual bool release()=0;
protected:
virtual ~i_service_endpoint() noexcept(false) {}
};
//some helpers
std::string print_connection_context(const connection_context_base& ctx);
std::string print_connection_context_short(const connection_context_base& ctx);
inline MAKE_LOGGABLE(connection_context_base, ct, os)
{
os << "[" << epee::net_utils::print_connection_context_short(ct) << "] ";
return os;
}
#define LOG_ERROR_CC(ct, message) MERROR(ct << message)
#define LOG_WARNING_CC(ct, message) MWARNING(ct << message)
#define LOG_INFO_CC(ct, message) MINFO(ct << message)
#define LOG_DEBUG_CC(ct, message) MDEBUG(ct << message)
#define LOG_TRACE_CC(ct, message) MTRACE(ct << message)
#define LOG_CC(level, ct, message) MLOG(level, ct << message)
#define LOG_PRINT_CC_L0(ct, message) LOG_PRINT_L0(ct << message)
#define LOG_PRINT_CC_L1(ct, message) LOG_PRINT_L1(ct << message)
#define LOG_PRINT_CC_L2(ct, message) LOG_PRINT_L2(ct << message)
#define LOG_PRINT_CC_L3(ct, message) LOG_PRINT_L3(ct << message)
#define LOG_PRINT_CC_L4(ct, message) LOG_PRINT_L4(ct << message)
#define LOG_PRINT_CCONTEXT_L0(message) LOG_PRINT_CC_L0(context, message)
#define LOG_PRINT_CCONTEXT_L1(message) LOG_PRINT_CC_L1(context, message)
#define LOG_PRINT_CCONTEXT_L2(message) LOG_PRINT_CC_L2(context, message)
#define LOG_PRINT_CCONTEXT_L3(message) LOG_PRINT_CC_L3(context, message)
#define LOG_ERROR_CCONTEXT(message) LOG_ERROR_CC(context, message)
#define CHECK_AND_ASSERT_MES_CC(condition, return_val, err_message) CHECK_AND_ASSERT_MES(condition, return_val, "[" << epee::net_utils::print_connection_context_short(context) << "]" << err_message)
}
}
#endif //_NET_UTILS_BASE_H_
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