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);
92 * @param data Buffer to write.
93 * @param size Number of bytes to write.
96 Socket::write (uint8_t const * data, int size)
98 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
99 boost::system::error_code ec = boost::asio::error::would_block;
101 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
104 _io_service.run_one ();
105 } while (ec == boost::asio::error::would_block);
108 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
111 if (_write_digester) {
112 _write_digester->add (data, static_cast<size_t>(size));
118 Socket::write (uint32_t v)
121 write (reinterpret_cast<uint8_t*> (&v), 4);
126 * @param data Buffer to read to.
127 * @param size Number of bytes to read.
130 Socket::read (uint8_t* data, int size)
132 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
133 boost::system::error_code ec = boost::asio::error::would_block;
135 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
138 _io_service.run_one ();
139 } while (ec == boost::asio::error::would_block);
142 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
145 if (_read_digester) {
146 _read_digester->add (data, static_cast<size_t>(size));
152 Socket::read_uint32 ()
155 read (reinterpret_cast<uint8_t *> (&v), 4);
161 Socket::start_read_digest ()
163 DCPOMATIC_ASSERT (!_read_digester);
164 _read_digester.reset (new Digester());
169 Socket::start_write_digest ()
171 DCPOMATIC_ASSERT (!_write_digester);
172 _write_digester.reset (new Digester());
176 Socket::ReadDigestScope::ReadDigestScope (shared_ptr<Socket> socket)
179 socket->start_read_digest ();
184 Socket::ReadDigestScope::check ()
186 auto sp = _socket.lock ();
191 return sp->check_read_digest ();
195 Socket::WriteDigestScope::WriteDigestScope (shared_ptr<Socket> socket)
198 socket->start_write_digest ();
202 Socket::WriteDigestScope::~WriteDigestScope ()
204 auto sp = _socket.lock ();
207 sp->finish_write_digest ();
209 /* If we can't write our digest, something bad has happened
210 * so let's just let it happen.
218 Socket::check_read_digest ()
220 DCPOMATIC_ASSERT (_read_digester);
221 int const size = _read_digester->size ();
224 _read_digester->get (ref);
226 /* Make sure _read_digester is gone before we call read() so that the digest
227 * isn't itself digested.
229 _read_digester.reset ();
231 uint8_t actual[size];
234 return memcmp(ref, actual, size) == 0;
239 Socket::finish_write_digest ()
241 DCPOMATIC_ASSERT (_write_digester);
242 int const size = _write_digester->size();
244 uint8_t buffer[size];
245 _write_digester->get (buffer);
247 /* Make sure _write_digester is gone before we call write() so that the digest
248 * isn't itself digested.
250 _write_digester.reset ();
252 write (buffer, size);
257 Socket::set_send_buffer_size (int size)
259 _send_buffer_size = size;