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danicoin/contrib/epee/include/net/net_utils_base.h
moneromooo-monero 072102cfd2
abstracted nework addresses 
All code which was using ip and port now uses a new IPv4 object,
subclass of a new network_address class. This will allow easy
addition of I2P addresses later (and also IPv6, etc).
Both old style and new style peer lists are now sent in the P2P
protocol, which is inefficient but allows peers using both
codebases to talk to each other. This will be removed in the
future. No other subclasses than IPv4 exist yet.
2017-05-27 11:35:54 +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 <typeinfo>
#include <boost/asio/io_service.hpp>
#include <boost/uuid/uuid.hpp>
#include "serialization/keyvalue_serialization.h"
#include "net/local_ip.h"
#include "string_tools.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
{
struct network_address_base
{
public:
bool operator==(const network_address_base &other) const { return m_full_id == other.m_full_id; }
bool operator!=(const network_address_base &other) const { return !operator==(other); }
bool operator<(const network_address_base &other) const { return m_full_id < other.m_full_id; }
bool is_same_host(const network_address_base &other) const { return m_host_id == other.m_host_id; }
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;
protected:
// A very simple non cryptographic hash function by Fowler, Noll, Vo
uint64_t fnv1a(const uint8_t *data, size_t len) const {
uint64_t h = 0xcbf29ce484222325;
while (len--)
h = (h ^ *data++) * 0x100000001b3;
return h;
}
uint64_t m_host_id;
uint64_t m_full_id;
};
struct ipv4_network_address: public network_address_base
{
void init_ids()
{
m_host_id = fnv1a((const uint8_t*)&m_ip, sizeof(m_ip));
m_full_id = fnv1a((const uint8_t*)&m_ip, sizeof(m_ip) + sizeof(m_port));
}
public:
ipv4_network_address(uint32_t ip, uint16_t port): network_address_base(), m_ip(ip), m_port(port) { init_ids(); }
uint32_t ip() const { return m_ip; }
uint16_t port() const { return m_port; }
virtual std::string str() const { return epee::string_tools::get_ip_string_from_int32(m_ip) + ":" + std::to_string(m_port); }
virtual std::string host_str() const { return epee::string_tools::get_ip_string_from_int32(m_ip); }
virtual bool is_loopback() const { return epee::net_utils::is_ip_loopback(m_ip); }
virtual bool is_local() const { return epee::net_utils::is_ip_local(m_ip); }
virtual uint8_t get_type_id() const { return ID; }
public: // serialization
static const uint8_t ID = 1;
#pragma pack(push)
#pragma pack(1)
uint32_t m_ip;
uint16_t m_port;
#pragma pack(pop)
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(m_ip)
KV_SERIALIZE(m_port)
if (!is_store)
const_cast<ipv4_network_address&>(this_ref).init_ids();
END_KV_SERIALIZE_MAP()
};
class network_address: public boost::shared_ptr<network_address_base>
{
public:
network_address() {}
network_address(ipv4_network_address *address): boost::shared_ptr<network_address_base>(address) {}
bool operator==(const network_address &other) const { return (*this)->operator==(*other); }
bool operator!=(const network_address &other) const { return (*this)->operator!=(*other); }
bool operator<(const network_address &other) const { return (*this)->operator<(*other); }
bool is_same_host(const network_address &other) const { return (*this)->is_same_host(*other); }
std::string str() const { return (*this) ? (*this)->str() : "<none>"; }
std::string host_str() const { return (*this) ? (*this)->host_str() : "<none>"; }
bool is_loopback() const { return (*this)->is_loopback(); }
bool is_local() const { return (*this)->is_local(); }
const std::type_info &type() const { return typeid(**this); }
uint8_t get_type_id() const { return (*this)->get_type_id(); }
template<typename Type> Type &as() { if (type() != typeid(Type)) throw std::runtime_error("Bad type"); return *(Type*)get(); }
template<typename Type> const Type &as() const { if (type() != typeid(Type)) throw std::runtime_error("Bad type"); return *(const Type*)get(); }
BEGIN_KV_SERIALIZE_MAP()
uint8_t type = is_store ? this_ref.get_type_id() : 0;
epee::serialization::selector<is_store>::serialize(type, stg, hparent_section, "type");
switch (type)
{
case ipv4_network_address::ID:
if (!is_store)
const_cast<network_address&>(this_ref).reset(new ipv4_network_address(0, 0));
KV_SERIALIZE(as<ipv4_network_address>());
break;
default: MERROR("Unsupported network address type: " << type); return false;
}
END_KV_SERIALIZE_MAP()
};
inline bool create_network_address(network_address &address, const std::string &string, uint16_t default_port = 0)
{
uint32_t ip;
uint16_t port;
if (epee::string_tools::parse_peer_from_string(ip, port, string))
{
if (default_port && !port)
port = default_port;
address.reset(new ipv4_network_address(ip, port));
return true;
}
return false;
}
/************************************************************************/
/* */
/************************************************************************/
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(new 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 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
inline
std::string print_connection_context(const connection_context_base& ctx)
{
std::stringstream ss;
ss << ctx.m_remote_address->str() << " " << epee::string_tools::get_str_from_guid_a(ctx.m_connection_id) << (ctx.m_is_income ? " INC":" OUT");
return ss.str();
}
inline
std::string print_connection_context_short(const connection_context_base& ctx)
{
std::stringstream ss;
ss << ctx.m_remote_address->str() << (ctx.m_is_income ? " INC":" OUT");
return ss.str();
}
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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