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_socket.h"
25 #include "exceptions.h"
26 #include <boost/bind/bind.hpp>
27 #include <boost/lambda/lambda.hpp>
33 using std::shared_ptr;
37 /** @param timeout Timeout in seconds */
38 Socket::Socket (int timeout)
39 : _deadline (_io_service)
40 , _socket (_io_service)
43 _deadline.expires_at (boost::posix_time::pos_infin);
50 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
52 _deadline.expires_at (boost::posix_time::pos_infin);
55 _deadline.async_wait (boost::bind (&Socket::check, this));
60 * @param endpoint End-point to connect to.
63 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
65 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
66 boost::system::error_code ec = boost::asio::error::would_block;
67 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
69 _io_service.run_one();
70 } while (ec == boost::asio::error::would_block);
73 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
76 if (!_socket.is_open ()) {
77 throw NetworkError (_("connect timed out"));
83 * @param data Buffer to write.
84 * @param size Number of bytes to write.
87 Socket::write (uint8_t const * data, int size)
89 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
90 boost::system::error_code ec = boost::asio::error::would_block;
92 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
95 _io_service.run_one ();
96 } while (ec == boost::asio::error::would_block);
99 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
102 if (_write_digester) {
103 _write_digester->add (data, static_cast<size_t>(size));
109 Socket::write (uint32_t v)
112 write (reinterpret_cast<uint8_t*> (&v), 4);
117 * @param data Buffer to read to.
118 * @param size Number of bytes to read.
121 Socket::read (uint8_t* data, int size)
123 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
124 boost::system::error_code ec = boost::asio::error::would_block;
126 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
129 _io_service.run_one ();
130 } while (ec == boost::asio::error::would_block);
133 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
136 if (_read_digester) {
137 _read_digester->add (data, static_cast<size_t>(size));
143 Socket::read_uint32 ()
146 read (reinterpret_cast<uint8_t *> (&v), 4);
152 Socket::start_read_digest ()
154 DCPOMATIC_ASSERT (!_read_digester);
155 _read_digester.reset (new Digester());
160 Socket::start_write_digest ()
162 DCPOMATIC_ASSERT (!_write_digester);
163 _write_digester.reset (new Digester());
167 Socket::ReadDigestScope::ReadDigestScope (shared_ptr<Socket> socket)
170 socket->start_read_digest ();
175 Socket::ReadDigestScope::check ()
177 auto sp = _socket.lock ();
182 return sp->check_read_digest ();
186 Socket::WriteDigestScope::WriteDigestScope (shared_ptr<Socket> socket)
189 socket->start_write_digest ();
193 Socket::WriteDigestScope::~WriteDigestScope ()
195 auto sp = _socket.lock ();
198 sp->finish_write_digest ();
200 /* If we can't write our digest, something bad has happened
201 * so let's just let it happen.
209 Socket::check_read_digest ()
211 DCPOMATIC_ASSERT (_read_digester);
212 int const size = _read_digester->size ();
215 _read_digester->get (ref);
217 /* Make sure _read_digester is gone before we call read() so that the digest
218 * isn't itself digested.
220 _read_digester.reset ();
222 uint8_t actual[size];
225 return memcmp(ref, actual, size) == 0;
230 Socket::finish_write_digest ()
232 DCPOMATIC_ASSERT (_write_digester);
233 int const size = _write_digester->size();
235 uint8_t buffer[size];
236 _write_digester->get (buffer);
238 /* Make sure _write_digester is gone before we call write() so that the digest
239 * isn't itself digested.
241 _write_digester.reset ();
243 write (buffer, size);