2 Copyright (C) 2012-2020 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "compose.hpp"
23 #include "dcpomatic_assert.h"
24 #include "dcpomatic_log.h"
25 #include "dcpomatic_socket.h"
26 #include "exceptions.h"
27 #include <boost/bind/bind.hpp>
28 #include <boost/lambda/lambda.hpp>
34 using std::shared_ptr;
38 /** @param timeout Timeout in seconds */
39 Socket::Socket (int timeout)
40 : _deadline (_io_service)
41 , _socket (_io_service)
44 _deadline.expires_at (boost::posix_time::pos_infin);
51 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
53 _deadline.expires_at (boost::posix_time::pos_infin);
56 _deadline.async_wait (boost::bind (&Socket::check, this));
61 * @param endpoint End-point to connect to.
64 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
66 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
67 boost::system::error_code ec = boost::asio::error::would_block;
68 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
70 _io_service.run_one();
71 } while (ec == boost::asio::error::would_block);
74 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
77 if (!_socket.is_open ()) {
78 throw NetworkError (_("connect timed out"));
81 if (_send_buffer_size) {
82 boost::asio::socket_base::send_buffer_size old_size;
83 _socket.get_option(old_size);
85 boost::asio::socket_base::send_buffer_size new_size(*_send_buffer_size);
86 _socket.set_option(new_size);
88 LOG_GENERAL("Changed socket send buffer size from %1 to %2", old_size.value(), *_send_buffer_size);
94 * @param data Buffer to write.
95 * @param size Number of bytes to write.
98 Socket::write (uint8_t const * data, int size)
100 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
101 boost::system::error_code ec = boost::asio::error::would_block;
103 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
106 _io_service.run_one ();
107 } while (ec == boost::asio::error::would_block);
110 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
113 if (_write_digester) {
114 _write_digester->add (data, static_cast<size_t>(size));
120 Socket::write (uint32_t v)
123 write (reinterpret_cast<uint8_t*> (&v), 4);
128 * @param data Buffer to read to.
129 * @param size Number of bytes to read.
132 Socket::read (uint8_t* data, int size)
134 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
135 boost::system::error_code ec = boost::asio::error::would_block;
137 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
140 _io_service.run_one ();
141 } while (ec == boost::asio::error::would_block);
144 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
147 if (_read_digester) {
148 _read_digester->add (data, static_cast<size_t>(size));
154 Socket::read_uint32 ()
157 read (reinterpret_cast<uint8_t *> (&v), 4);
163 Socket::start_read_digest ()
165 DCPOMATIC_ASSERT (!_read_digester);
166 _read_digester.reset (new Digester());
171 Socket::start_write_digest ()
173 DCPOMATIC_ASSERT (!_write_digester);
174 _write_digester.reset (new Digester());
178 Socket::ReadDigestScope::ReadDigestScope (shared_ptr<Socket> socket)
181 socket->start_read_digest ();
186 Socket::ReadDigestScope::check ()
188 auto sp = _socket.lock ();
193 return sp->check_read_digest ();
197 Socket::WriteDigestScope::WriteDigestScope (shared_ptr<Socket> socket)
200 socket->start_write_digest ();
204 Socket::WriteDigestScope::~WriteDigestScope ()
206 auto sp = _socket.lock ();
209 sp->finish_write_digest ();
211 /* If we can't write our digest, something bad has happened
212 * so let's just let it happen.
220 Socket::check_read_digest ()
222 DCPOMATIC_ASSERT (_read_digester);
223 int const size = _read_digester->size ();
226 _read_digester->get (ref);
228 /* Make sure _read_digester is gone before we call read() so that the digest
229 * isn't itself digested.
231 _read_digester.reset ();
233 uint8_t actual[size];
236 return memcmp(ref, actual, size) == 0;
241 Socket::finish_write_digest ()
243 DCPOMATIC_ASSERT (_write_digester);
244 int const size = _write_digester->size();
246 uint8_t buffer[size];
247 _write_digester->get (buffer);
249 /* Make sure _write_digester is gone before we call write() so that the digest
250 * isn't itself digested.
252 _write_digester.reset ();
254 write (buffer, size);
259 Socket::set_send_buffer_size (int size)
261 _send_buffer_size = size;