0ff4350352
Passing it by value is actually smaller (32 bit) than the rvalue reference (64 bit pointer), and it ensures that the object is consumed after the call returns, no matter how the methods are implemented.
114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "ClientInternal.hxx"
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#include "ClientList.hxx"
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#include "Partition.hxx"
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#include "Instance.hxx"
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#include "net/UniqueSocketDescriptor.hxx"
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#include "net/SocketAddress.hxx"
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#include "net/ToString.hxx"
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#include "Permission.hxx"
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#include "Log.hxx"
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#include <assert.h>
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#ifdef WIN32
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#include <winsock2.h>
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#else
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_LIBWRAP
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#include <tcpd.h>
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#endif
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static constexpr char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
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Client::Client(EventLoop &_loop, Partition &_partition,
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UniqueSocketDescriptor _fd, int _uid, int _num)
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:FullyBufferedSocket(_fd.Release(), _loop,
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16384, client_max_output_buffer_size),
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timeout_event(_loop, BIND_THIS_METHOD(OnTimeout)),
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partition(&_partition),
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permission(getDefaultPermissions()),
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uid(_uid),
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num(_num)
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{
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timeout_event.Schedule(client_timeout);
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}
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void
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client_new(EventLoop &loop, Partition &partition,
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UniqueSocketDescriptor fd, SocketAddress address, int uid)
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{
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static unsigned int next_client_num;
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const auto remote = ToString(address);
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assert(fd.IsDefined());
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#ifdef HAVE_LIBWRAP
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if (address.GetFamily() != AF_LOCAL) {
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// TODO: shall we obtain the program name from argv[0]?
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const char *progname = "mpd";
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struct request_info req;
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request_init(&req, RQ_FILE, fd.Get(), RQ_DAEMON, progname, 0);
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fromhost(&req);
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if (!hosts_access(&req)) {
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/* tcp wrappers says no */
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FormatWarning(client_domain,
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"libwrap refused connection (libwrap=%s) from %s",
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progname, remote.c_str());
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return;
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}
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}
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#endif /* HAVE_WRAP */
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ClientList &client_list = *partition.instance.client_list;
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if (client_list.IsFull()) {
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LogWarning(client_domain, "Max connections reached");
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return;
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}
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(void)fd.Write(GREETING, sizeof(GREETING) - 1);
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Client *client = new Client(loop, partition, std::move(fd), uid,
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next_client_num++);
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client_list.Add(*client);
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FormatInfo(client_domain, "[%u] opened from %s",
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client->num, remote.c_str());
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}
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void
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Client::Close()
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{
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partition->instance.client_list->Remove(*this);
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SetExpired();
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FormatInfo(client_domain, "[%u] closed", num);
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delete this;
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}
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