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/>.
21 #include "dcpomatic_socket.h"
22 #include "compose.hpp"
23 #include "exceptions.h"
24 #include "dcpomatic_assert.h"
25 #include <boost/bind/bind.hpp>
26 #include <boost/lambda/lambda.hpp>
31 using std::shared_ptr;
34 /** @param timeout Timeout in seconds */
35 Socket::Socket (int timeout)
36 : _deadline (_io_service)
37 , _socket (_io_service)
40 _deadline.expires_at (boost::posix_time::pos_infin);
47 if (_deadline.expires_at() <= boost::asio::deadline_timer::traits_type::now ()) {
49 _deadline.expires_at (boost::posix_time::pos_infin);
52 _deadline.async_wait (boost::bind (&Socket::check, this));
56 * @param endpoint End-point to connect to.
59 Socket::connect (boost::asio::ip::tcp::endpoint endpoint)
61 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
62 boost::system::error_code ec = boost::asio::error::would_block;
63 _socket.async_connect (endpoint, boost::lambda::var(ec) = boost::lambda::_1);
65 _io_service.run_one();
66 } while (ec == boost::asio::error::would_block);
69 throw NetworkError (String::compose (_("error during async_connect (%1)"), ec.value ()));
72 if (!_socket.is_open ()) {
73 throw NetworkError (_("connect timed out"));
78 * @param data Buffer to write.
79 * @param size Number of bytes to write.
82 Socket::write (uint8_t const * data, int size)
84 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
85 boost::system::error_code ec = boost::asio::error::would_block;
87 boost::asio::async_write (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
90 _io_service.run_one ();
91 } while (ec == boost::asio::error::would_block);
94 throw NetworkError (String::compose (_("error during async_write (%1)"), ec.value ()));
97 if (_write_digester) {
98 _write_digester->add (data, static_cast<size_t>(size));
103 Socket::write (uint32_t v)
106 write (reinterpret_cast<uint8_t*> (&v), 4);
110 * @param data Buffer to read to.
111 * @param size Number of bytes to read.
114 Socket::read (uint8_t* data, int size)
116 _deadline.expires_from_now (boost::posix_time::seconds (_timeout));
117 boost::system::error_code ec = boost::asio::error::would_block;
119 boost::asio::async_read (_socket, boost::asio::buffer (data, size), boost::lambda::var(ec) = boost::lambda::_1);
122 _io_service.run_one ();
123 } while (ec == boost::asio::error::would_block);
126 throw NetworkError (String::compose (_("error during async_read (%1)"), ec.value ()));
129 if (_read_digester) {
130 _read_digester->add (data, static_cast<size_t>(size));
135 Socket::read_uint32 ()
138 read (reinterpret_cast<uint8_t *> (&v), 4);
144 Socket::start_read_digest ()
146 DCPOMATIC_ASSERT (!_read_digester);
147 _read_digester.reset (new Digester());
151 Socket::start_write_digest ()
153 DCPOMATIC_ASSERT (!_write_digester);
154 _write_digester.reset (new Digester());
158 Socket::ReadDigestScope::ReadDigestScope (shared_ptr<Socket> socket)
161 socket->start_read_digest ();
166 Socket::ReadDigestScope::check ()
168 shared_ptr<Socket> sp = _socket.lock ();
173 return sp->check_read_digest ();
177 Socket::WriteDigestScope::WriteDigestScope (shared_ptr<Socket> socket)
180 socket->start_write_digest ();
184 Socket::WriteDigestScope::~WriteDigestScope ()
186 shared_ptr<Socket> sp = _socket.lock ();
189 sp->finish_write_digest ();
191 /* If we can't write our digest, something bad has happened
192 * so let's just let it happen.
200 Socket::check_read_digest ()
202 DCPOMATIC_ASSERT (_read_digester);
203 int const size = _read_digester->size ();
206 _read_digester->get (ref);
208 /* Make sure _read_digester is gone before we call read() so that the digest
209 * isn't itself digested.
211 _read_digester.reset ();
213 uint8_t actual[size];
216 return memcmp(ref, actual, size) == 0;
220 Socket::finish_write_digest ()
222 DCPOMATIC_ASSERT (_write_digester);
223 int const size = _write_digester->size();
225 uint8_t buffer[size];
226 _write_digester->get (buffer);
228 /* Make sure _write_digester is gone before we call write() so that the digest
229 * isn't itself digested.
231 _write_digester.reset ();
233 write (buffer, size);