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monero/contrib/epee/include/net/abstract_tcp_server2.inl

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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.
//
#include "net_utils_base.h"
#include <boost/lambda/bind.hpp>
#include <boost/foreach.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/uuid/random_generator.hpp>
#include <boost/chrono.hpp>
#include <boost/utility/value_init.hpp>
#include <boost/asio/deadline_timer.hpp>
#include "misc_language.h"
#include "pragma_comp_defs.h"
PRAGMA_WARNING_PUSH
namespace epee
{
namespace net_utils
{
/************************************************************************/
/* */
/************************************************************************/
PRAGMA_WARNING_DISABLE_VS(4355)
template<class t_protocol_handler>
connection<t_protocol_handler>::connection(boost::asio::io_service& io_service,
typename t_protocol_handler::config_type& config, volatile uint32_t& sock_count, i_connection_filter* &pfilter)
: strand_(io_service),
socket_(io_service),
m_want_close_connection(0),
m_was_shutdown(0),
m_ref_sockets_count(sock_count),
m_pfilter(pfilter),
m_protocol_handler(this, config, context)
{
boost::interprocess::ipcdetail::atomic_inc32(&m_ref_sockets_count);
}
PRAGMA_WARNING_DISABLE_VS(4355)
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
connection<t_protocol_handler>::~connection()
{
if(!m_was_shutdown)
{
LOG_PRINT_L3("[sock " << socket_.native_handle() << "] Socket destroyed without shutdown.");
shutdown();
}
LOG_PRINT_L3("[sock " << socket_.native_handle() << "] Socket destroyed");
boost::interprocess::ipcdetail::atomic_dec32(&m_ref_sockets_count);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::asio::ip::tcp::socket& connection<t_protocol_handler>::socket()
{
return socket_;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::shared_ptr<connection<t_protocol_handler> > connection<t_protocol_handler>::safe_shared_from_this()
{
try
{
return connection<t_protocol_handler>::shared_from_this();
}
catch (const boost::bad_weak_ptr&)
{
// It happens when the connection is being deleted
return boost::shared_ptr<connection<t_protocol_handler> >();
}
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::start(bool is_income, bool is_multithreaded)
{
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
m_is_multithreaded = is_multithreaded;
boost::system::error_code ec;
auto remote_ep = socket_.remote_endpoint(ec);
CHECK_AND_NO_ASSERT_MES(!ec, false, "Failed to get remote endpoint: " << ec.message() << ':' << ec.value());
auto local_ep = socket_.local_endpoint(ec);
CHECK_AND_NO_ASSERT_MES(!ec, false, "Failed to get local endpoint: " << ec.message() << ':' << ec.value());
context = boost::value_initialized<t_connection_context>();
long ip_ = boost::asio::detail::socket_ops::host_to_network_long(remote_ep.address().to_v4().to_ulong());
context.set_details(boost::uuids::random_generator()(), ip_, remote_ep.port(), is_income);
LOG_PRINT_L3("[sock " << socket_.native_handle() << "] new connection from " << print_connection_context_short(context) <<
" to " << local_ep.address().to_string() << ':' << local_ep.port() <<
", total sockets objects " << m_ref_sockets_count);
if(m_pfilter && !m_pfilter->is_remote_ip_allowed(context.m_remote_ip))
{
LOG_PRINT_L2("[sock " << socket_.native_handle() << "] ip denied " << string_tools::get_ip_string_from_int32(context.m_remote_ip) << ", shutdowning connection");
close();
return false;
}
m_protocol_handler.after_init_connection();
socket_.async_read_some(boost::asio::buffer(buffer_),
strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_read, self,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)));
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::start()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::request_callback()
{
TRY_ENTRY();
LOG_PRINT_L2("[" << print_connection_context_short(context) << "] request_callback");
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
strand_.post(boost::bind(&connection<t_protocol_handler>::call_back_starter, self));
CATCH_ENTRY_L0("connection<t_protocol_handler>::request_callback()", false);
return true;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boost::asio::io_service& connection<t_protocol_handler>::get_io_service()
{
return socket_.get_io_service();
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::add_ref()
{
TRY_ENTRY();
LOG_PRINT_L4("[sock " << socket_.native_handle() << "] add_ref");
CRITICAL_REGION_LOCAL(m_self_refs_lock);
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
if(m_was_shutdown)
return false;
m_self_refs.push_back(self);
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::add_ref()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::release()
{
TRY_ENTRY();
boost::shared_ptr<connection<t_protocol_handler> > back_connection_copy;
LOG_PRINT_L4("[sock " << socket_.native_handle() << "] release");
CRITICAL_REGION_BEGIN(m_self_refs_lock);
CHECK_AND_ASSERT_MES(m_self_refs.size(), false, "[sock " << socket_.native_handle() << "] m_self_refs empty at connection<t_protocol_handler>::release() call");
//erasing from container without additional copy can cause start deleting object, including m_self_refs
back_connection_copy = m_self_refs.back();
m_self_refs.pop_back();
CRITICAL_REGION_END();
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::release()", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::call_back_starter()
{
TRY_ENTRY();
LOG_PRINT_L2("[" << print_connection_context_short(context) << "] fired_callback");
m_protocol_handler.handle_qued_callback();
CATCH_ENTRY_L0("connection<t_protocol_handler>::call_back_starter()", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::handle_read(const boost::system::error_code& e,
std::size_t bytes_transferred)
{
TRY_ENTRY();
LOG_PRINT_L4("[sock " << socket_.native_handle() << "] Async read calledback.");
if (!e)
{
LOG_PRINT("[sock " << socket_.native_handle() << "] RECV " << bytes_transferred, LOG_LEVEL_4);
context.m_last_recv = time(NULL);
context.m_recv_cnt += bytes_transferred;
bool recv_res = m_protocol_handler.handle_recv(buffer_.data(), bytes_transferred);
if(!recv_res)
{
LOG_PRINT("[sock " << socket_.native_handle() << "] protocol_want_close", LOG_LEVEL_4);
//some error in protocol, protocol handler ask to close connection
boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
bool do_shutdown = false;
CRITICAL_REGION_BEGIN(m_send_que_lock);
if(!m_send_que.size())
do_shutdown = true;
CRITICAL_REGION_END();
if(do_shutdown)
shutdown();
}else
{
socket_.async_read_some(boost::asio::buffer(buffer_),
strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_read, connection<t_protocol_handler>::shared_from_this(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred)));
LOG_PRINT_L4("[sock " << socket_.native_handle() << "]Async read requested.");
}
}else
{
LOG_PRINT_L3("[sock " << socket_.native_handle() << "] Some not success at read: " << e.message() << ':' << e.value());
if(e.value() != 2)
{
LOG_PRINT_L3("[sock " << socket_.native_handle() << "] Some problems at read: " << e.message() << ':' << e.value());
shutdown();
}
}
// If an error occurs then no new asynchronous operations are started. This
// means that all shared_ptr references to the connection object will
// disappear and the object will be destroyed automatically after this
// handler returns. The connection class's destructor closes the socket.
CATCH_ENTRY_L0("connection<t_protocol_handler>::handle_read", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::call_run_once_service_io()
{
TRY_ENTRY();
if(!m_is_multithreaded)
{
//single thread model, we can wait in blocked call
size_t cnt = socket_.get_io_service().run_one();
if(!cnt)//service is going to quit
return false;
}else
{
//multi thread model, we can't(!) wait in blocked call
//so we make non blocking call and releasing CPU by calling sleep(0);
//if no handlers were called
//TODO: Maybe we need to have have critical section + event + callback to upper protocol to
//ask it inside(!) critical region if we still able to go in event wait...
size_t cnt = socket_.get_io_service().poll_one();
if(!cnt)
misc_utils::sleep_no_w(0);
}
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::call_run_once_service_io", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::do_send(const void* ptr, size_t cb)
{
TRY_ENTRY();
// Use safe_shared_from_this, because of this is public method and it can be called on the object being deleted
auto self = safe_shared_from_this();
if(!self)
return false;
if(m_was_shutdown)
return false;
LOG_PRINT("[sock " << socket_.native_handle() << "] SEND " << cb, LOG_LEVEL_4);
context.m_last_send = time(NULL);
context.m_send_cnt += cb;
//some data should be wrote to stream
//request complete
epee::critical_region_t<decltype(m_send_que_lock)> send_guard(m_send_que_lock);
if(m_send_que.size() > ABSTRACT_SERVER_SEND_QUE_MAX_COUNT)
{
send_guard.unlock();
LOG_PRINT_L2("send que size is more than ABSTRACT_SERVER_SEND_QUE_MAX_COUNT(" << ABSTRACT_SERVER_SEND_QUE_MAX_COUNT << "), shutting down connection");
close();
return false;
}
m_send_que.resize(m_send_que.size()+1);
m_send_que.back().assign((const char*)ptr, cb);
if(m_send_que.size() > 1)
{
//active operation should be in progress, nothing to do, just wait last operation callback
}else
{
//no active operation
if(m_send_que.size()!=1)
{
LOG_ERROR("Looks like no active operations, but send que size != 1!!");
return false;
}
boost::asio::async_write(socket_, boost::asio::buffer(m_send_que.front().data(), m_send_que.front().size()),
//strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_write, self, _1, _2)
//)
);
LOG_PRINT_L4("[sock " << socket_.native_handle() << "] Async send requested " << m_send_que.front().size());
}
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::do_send", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::shutdown()
{
// Initiate graceful connection closure.
boost::system::error_code ignored_ec;
socket_.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ignored_ec);
m_was_shutdown = true;
m_protocol_handler.release_protocol();
return true;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool connection<t_protocol_handler>::close()
{
TRY_ENTRY();
LOG_PRINT_L4("[sock " << socket_.native_handle() << "] Que Shutdown called.");
size_t send_que_size = 0;
CRITICAL_REGION_BEGIN(m_send_que_lock);
send_que_size = m_send_que.size();
CRITICAL_REGION_END();
boost::interprocess::ipcdetail::atomic_write32(&m_want_close_connection, 1);
if(!send_que_size)
{
shutdown();
}
return true;
CATCH_ENTRY_L0("connection<t_protocol_handler>::close", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void connection<t_protocol_handler>::handle_write(const boost::system::error_code& e, size_t cb)
{
TRY_ENTRY();
LOG_PRINT_L4("[sock " << socket_.native_handle() << "] Async send calledback " << cb);
if (e)
{
LOG_PRINT_L1("[sock " << socket_.native_handle() << "] Some problems at write: " << e.message() << ':' << e.value());
shutdown();
return;
}
bool do_shutdown = false;
CRITICAL_REGION_BEGIN(m_send_que_lock);
if(m_send_que.empty())
{
LOG_ERROR("[sock " << socket_.native_handle() << "] m_send_que.size() == 0 at handle_write!");
return;
}
m_send_que.pop_front();
if(m_send_que.empty())
{
if(boost::interprocess::ipcdetail::atomic_read32(&m_want_close_connection))
{
do_shutdown = true;
}
}else
{
//have more data to send
boost::asio::async_write(socket_, boost::asio::buffer(m_send_que.front().data(), m_send_que.front().size()),
//strand_.wrap(
boost::bind(&connection<t_protocol_handler>::handle_write, connection<t_protocol_handler>::shared_from_this(), _1, _2));
//);
}
CRITICAL_REGION_END();
if(do_shutdown)
{
shutdown();
}
CATCH_ENTRY_L0("connection<t_protocol_handler>::handle_write", void());
}
/************************************************************************/
/* */
/************************************************************************/
template<class t_protocol_handler>
boosted_tcp_server<t_protocol_handler>::boosted_tcp_server():
m_io_service_local_instance(new boost::asio::io_service()),
io_service_(*m_io_service_local_instance.get()),
acceptor_(io_service_),
new_connection_(new connection<t_protocol_handler>(io_service_, m_config, m_sockets_count, m_pfilter)),
m_stop_signal_sent(false), m_port(0), m_sockets_count(0), m_threads_count(0), m_pfilter(NULL), m_thread_index(0)
{
m_thread_name_prefix = "NET";
}
template<class t_protocol_handler>
boosted_tcp_server<t_protocol_handler>::boosted_tcp_server(boost::asio::io_service& extarnal_io_service):
io_service_(extarnal_io_service),
acceptor_(io_service_),
new_connection_(new connection<t_protocol_handler>(io_service_, m_config, m_sockets_count, m_pfilter)),
m_stop_signal_sent(false), m_port(0), m_sockets_count(0), m_threads_count(0), m_pfilter(NULL), m_thread_index(0)
{
m_thread_name_prefix = "NET";
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
boosted_tcp_server<t_protocol_handler>::~boosted_tcp_server()
{
this->send_stop_signal();
timed_wait_server_stop(10000);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::init_server(uint32_t port, const std::string address)
{
TRY_ENTRY();
m_stop_signal_sent = false;
m_port = port;
m_address = address;
// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(address, boost::lexical_cast<std::string>(port));
boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query);
acceptor_.open(endpoint.protocol());
acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
acceptor_.bind(endpoint);
acceptor_.listen();
boost::asio::ip::tcp::endpoint binded_endpoint = acceptor_.local_endpoint();
m_port = binded_endpoint.port();
acceptor_.async_accept(new_connection_->socket(),
boost::bind(&boosted_tcp_server<t_protocol_handler>::handle_accept, this,
boost::asio::placeholders::error));
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::init_server", false);
}
//-----------------------------------------------------------------------------
PUSH_WARNINGS
DISABLE_GCC_WARNING(maybe-uninitialized)
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::init_server(const std::string port, const std::string& address)
{
uint32_t p = 0;
if (port.size() && !string_tools::get_xtype_from_string(p, port)) {
LOG_ERROR("Failed to convert port no = " << port);
return false;
}
return this->init_server(p, address);
}
POP_WARNINGS
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::worker_thread()
{
TRY_ENTRY();
uint32_t local_thr_index = boost::interprocess::ipcdetail::atomic_inc32(&m_thread_index);
std::string thread_name = std::string("[") + m_thread_name_prefix;
thread_name += boost::to_string(local_thr_index) + "]";
log_space::log_singletone::set_thread_log_prefix(thread_name);
while(!m_stop_signal_sent)
{
try
{
io_service_.run();
}
catch(const std::exception& ex)
{
LOG_ERROR("Exception at server worker thread, what=" << ex.what());
}
catch(...)
{
LOG_ERROR("Exception at server worker thread, unknown execption");
}
}
LOG_PRINT_L4("Worker thread finished");
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::worker_thread", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::set_threads_prefix(const std::string& prefix_name)
{
m_thread_name_prefix = prefix_name;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::set_connection_filter(i_connection_filter* pfilter)
{
m_pfilter = pfilter;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::run_server(size_t threads_count, bool wait, const boost::thread::attributes& attrs)
{
TRY_ENTRY();
m_threads_count = threads_count;
m_main_thread_id = boost::this_thread::get_id();
log_space::log_singletone::set_thread_log_prefix("[SRV_MAIN]");
while(!m_stop_signal_sent)
{
// Create a pool of threads to run all of the io_services.
CRITICAL_REGION_BEGIN(m_threads_lock);
for (std::size_t i = 0; i < threads_count; ++i)
{
boost::shared_ptr<boost::thread> thread(new boost::thread(
attrs, boost::bind(&boosted_tcp_server<t_protocol_handler>::worker_thread, this)));
m_threads.push_back(thread);
}
CRITICAL_REGION_END();
// Wait for all threads in the pool to exit.
if(wait)
{
for (std::size_t i = 0; i < m_threads.size(); ++i)
m_threads[i]->join();
m_threads.clear();
}else
{
return true;
}
if(wait && !m_stop_signal_sent)
{
//some problems with the listening socket ?..
LOG_PRINT_L0("Net service stopped without stop request, restarting...");
if(!this->init_server(m_port, m_address))
{
LOG_PRINT_L0("Reiniting service failed, exit.");
return false;
}else
{
LOG_PRINT_L0("Reiniting OK.");
}
}
}
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::run_server", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::is_thread_worker()
{
TRY_ENTRY();
CRITICAL_REGION_LOCAL(m_threads_lock);
BOOST_FOREACH(boost::shared_ptr<boost::thread>& thp, m_threads)
{
if(thp->get_id() == boost::this_thread::get_id())
return true;
}
if(m_threads_count == 1 && boost::this_thread::get_id() == m_main_thread_id)
return true;
return false;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::is_thread_worker", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::timed_wait_server_stop(uint64_t wait_mseconds)
{
TRY_ENTRY();
boost::chrono::milliseconds ms(wait_mseconds);
for (std::size_t i = 0; i < m_threads.size(); ++i)
{
if(m_threads[i]->joinable() && !m_threads[i]->try_join_for(ms))
{
LOG_PRINT_L0("Interrupting thread " << m_threads[i]->native_handle());
m_threads[i]->interrupt();
}
}
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::timed_wait_server_stop", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::send_stop_signal()
{
m_stop_signal_sent = true;
TRY_ENTRY();
io_service_.stop();
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::send_stop_signal()", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::is_stop_signal_sent()
{
return m_stop_signal_sent;
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
void boosted_tcp_server<t_protocol_handler>::handle_accept(const boost::system::error_code& e)
{
TRY_ENTRY();
if (!e)
{
connection_ptr conn(std::move(new_connection_));
new_connection_.reset(new connection<t_protocol_handler>(io_service_, m_config, m_sockets_count, m_pfilter));
acceptor_.async_accept(new_connection_->socket(),
boost::bind(&boosted_tcp_server<t_protocol_handler>::handle_accept, this,
boost::asio::placeholders::error));
bool r = conn->start(true, 1 < m_threads_count);
if (!r)
LOG_ERROR("[sock " << conn->socket().native_handle() << "] Failed to start connection, connections_count = " << m_sockets_count);
}else
{
LOG_ERROR("Some problems at accept: " << e.message() << ", connections_count = " << m_sockets_count);
}
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::handle_accept", void());
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::connect(const std::string& adr, const std::string& port, uint32_t conn_timeout, t_connection_context& conn_context, const std::string& bind_ip)
{
TRY_ENTRY();
connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_config, m_sockets_count, m_pfilter) );
boost::asio::ip::tcp::socket& sock_ = new_connection_l->socket();
//////////////////////////////////////////////////////////////////////////
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(), adr, port);
boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query);
boost::asio::ip::tcp::resolver::iterator end;
if(iterator == end)
{
LOG_ERROR("Failed to resolve " << adr);
return false;
}
//////////////////////////////////////////////////////////////////////////
//boost::asio::ip::tcp::endpoint remote_endpoint(boost::asio::ip::address::from_string(addr.c_str()), port);
boost::asio::ip::tcp::endpoint remote_endpoint(*iterator);
sock_.open(remote_endpoint.protocol());
if(bind_ip != "0.0.0.0" && bind_ip != "0" && bind_ip != "" )
{
boost::asio::ip::tcp::endpoint local_endpoint(boost::asio::ip::address::from_string(adr.c_str()), 0);
sock_.bind(local_endpoint);
}
/*
NOTICE: be careful to make sync connection from event handler: in case if all threads suddenly do sync connect, there will be no thread to dispatch events from io service.
*/
boost::system::error_code ec = boost::asio::error::would_block;
//have another free thread(s), work in wait mode, without event handling
struct local_async_context
{
boost::system::error_code ec;
boost::mutex connect_mut;
boost::condition_variable cond;
};
boost::shared_ptr<local_async_context> local_shared_context(new local_async_context());
local_shared_context->ec = boost::asio::error::would_block;
boost::unique_lock<boost::mutex> lock(local_shared_context->connect_mut);
auto connect_callback = [](boost::system::error_code ec_, boost::shared_ptr<local_async_context> shared_context)
{
shared_context->connect_mut.lock(); shared_context->ec = ec_; shared_context->connect_mut.unlock(); shared_context->cond.notify_one();
};
sock_.async_connect(remote_endpoint, boost::bind<void>(connect_callback, _1, local_shared_context));
while(local_shared_context->ec == boost::asio::error::would_block)
{
bool r = local_shared_context->cond.timed_wait(lock, boost::get_system_time() + boost::posix_time::milliseconds(conn_timeout));
if(local_shared_context->ec == boost::asio::error::would_block && !r)
{
//timeout
sock_.close();
LOG_PRINT_L3("Failed to connect to " << adr << ":" << port << ", because of timeout (" << conn_timeout << ")");
return false;
}
}
ec = local_shared_context->ec;
if (ec || !sock_.is_open())
{
LOG_PRINT("Some problems at connect, message: " << ec.message(), LOG_LEVEL_3);
return false;
}
LOG_PRINT_L3("Connected success to " << adr << ':' << port);
bool r = new_connection_l->start(false, 1 < m_threads_count);
if (r)
{
new_connection_l->get_context(conn_context);
//new_connection_l.reset(new connection<t_protocol_handler>(io_service_, m_config, m_sockets_count, m_pfilter));
}
else
{
LOG_ERROR("[sock " << new_connection_->socket().native_handle() << "] Failed to start connection, connections_count = " << m_sockets_count);
}
return r;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::connect", false);
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler> template<class t_callback>
bool boosted_tcp_server<t_protocol_handler>::connect_async(const std::string& adr, const std::string& port, uint32_t conn_timeout, t_callback cb, const std::string& bind_ip)
{
TRY_ENTRY();
connection_ptr new_connection_l(new connection<t_protocol_handler>(io_service_, m_config, m_sockets_count, m_pfilter) );
boost::asio::ip::tcp::socket& sock_ = new_connection_l->socket();
//////////////////////////////////////////////////////////////////////////
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(boost::asio::ip::tcp::v4(), adr, port);
boost::asio::ip::tcp::resolver::iterator iterator = resolver.resolve(query);
boost::asio::ip::tcp::resolver::iterator end;
if(iterator == end)
{
LOG_ERROR("Failed to resolve " << adr);
return false;
}
//////////////////////////////////////////////////////////////////////////
boost::asio::ip::tcp::endpoint remote_endpoint(*iterator);
sock_.open(remote_endpoint.protocol());
if(bind_ip != "0.0.0.0" && bind_ip != "0" && bind_ip != "" )
{
boost::asio::ip::tcp::endpoint local_endpoint(boost::asio::ip::address::from_string(adr.c_str()), 0);
sock_.bind(local_endpoint);
}
boost::shared_ptr<boost::asio::deadline_timer> sh_deadline(new boost::asio::deadline_timer(io_service_));
//start deadline
sh_deadline->expires_from_now(boost::posix_time::milliseconds(conn_timeout));
sh_deadline->async_wait([=](const boost::system::error_code& error)
{
if(error != boost::asio::error::operation_aborted)
{
LOG_PRINT_L3("Failed to connect to " << adr << ':' << port << ", because of timeout (" << conn_timeout << ")");
new_connection_l->socket().close();
}
});
//start async connect
sock_.async_connect(remote_endpoint, [=](const boost::system::error_code& ec_)
{
t_connection_context conn_context = AUTO_VAL_INIT(conn_context);
boost::system::error_code ignored_ec;
boost::asio::ip::tcp::socket::endpoint_type lep = new_connection_l->socket().local_endpoint(ignored_ec);
if(!ec_)
{//success
if(!sh_deadline->cancel())
{
cb(conn_context, boost::asio::error::operation_aborted);//this mean that deadline timer already queued callback with cancel operation, rare situation
}else
{
LOG_PRINT_L3("[sock " << new_connection_l->socket().native_handle() << "] Connected success to " << adr << ':' << port <<
" from " << lep.address().to_string() << ':' << lep.port());
bool r = new_connection_l->start(false, 1 < m_threads_count);
if (r)
{
new_connection_l->get_context(conn_context);
cb(conn_context, ec_);
}
else
{
LOG_PRINT_L3("[sock " << new_connection_l->socket().native_handle() << "] Failed to start connection to " << adr << ':' << port);
cb(conn_context, boost::asio::error::fault);
}
}
}else
{
LOG_PRINT_L3("[sock " << new_connection_l->socket().native_handle() << "] Failed to connect to " << adr << ':' << port <<
" from " << lep.address().to_string() << ':' << lep.port() << ": " << ec_.message() << ':' << ec_.value());
cb(conn_context, ec_);
}
});
return true;
CATCH_ENTRY_L0("boosted_tcp_server<t_protocol_handler>::connect_async", false);
}
}
}
PRAGMA_WARNING_POP
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