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/*
* Copyright 2003-2017 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "ClientInternal.hxx"
#include "ClientList.hxx"
#include "Partition.hxx"
#include "Instance.hxx"
#include "net/UniqueSocketDescriptor.hxx"
#include "net/SocketAddress.hxx"
#include "net/ToString.hxx"
#include "Permission.hxx"
#include "Log.hxx"
#include <assert.h>
#ifdef _WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#endif
#ifdef HAVE_LIBWRAP
#include <tcpd.h>
#endif
static constexpr char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
Client::Client(EventLoop &_loop, Partition &_partition,
UniqueSocketDescriptor _fd,
int _uid, unsigned _permission,
int _num) noexcept
:FullyBufferedSocket(_fd.Release(), _loop,
16384, client_max_output_buffer_size),
timeout_event(_loop, BIND_THIS_METHOD(OnTimeout)),
partition(&_partition),
permission(_permission),
uid(_uid),
num(_num)
{
timeout_event.Schedule(client_timeout);
}
void
client_new(EventLoop &loop, Partition &partition,
UniqueSocketDescriptor fd, SocketAddress address, int uid,
unsigned permission) noexcept
{
static unsigned int next_client_num;
const auto remote = ToString(address);
assert(fd.IsDefined());
#ifdef HAVE_LIBWRAP
if (address.GetFamily() != AF_LOCAL) {
// TODO: shall we obtain the program name from argv[0]?
const char *progname = "mpd";
struct request_info req;
request_init(&req, RQ_FILE, fd.Get(), RQ_DAEMON, progname, 0);
fromhost(&req);
if (!hosts_access(&req)) {
/* tcp wrappers says no */
FormatWarning(client_domain,
"libwrap refused connection (libwrap=%s) from %s",
progname, remote.c_str());
return;
}
}
#endif /* HAVE_WRAP */
ClientList &client_list = *partition.instance.client_list;
if (client_list.IsFull()) {
LogWarning(client_domain, "Max connections reached");
return;
}
(void)fd.Write(GREETING, sizeof(GREETING) - 1);
Client *client = new Client(loop, partition, std::move(fd), uid,
permission,
next_client_num++);
client_list.Add(*client);
FormatInfo(client_domain, "[%u] opened from %s",
client->num, remote.c_str());
}
void
Client::Close() noexcept
{
partition->instance.client_list->Remove(*this);
SetExpired();
FormatInfo(client_domain, "[%u] closed", num);
delete this;
}
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