1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*
* Copyright (C) 2003-2015 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 "system/fd_util.h"
#include "net/SocketAddress.hxx"
#include "net/ToString.hxx"
#include "Permission.hxx"
#include "util/Error.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 const char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
Client::Client(EventLoop &_loop, Partition &_partition,
int _fd, int _uid, int _num)
:FullyBufferedSocket(_fd, _loop, 16384, client_max_output_buffer_size),
TimeoutMonitor(_loop),
partition(_partition),
playlist(partition.playlist), player_control(partition.pc),
permission(getDefaultPermissions()),
uid(_uid),
num(_num),
idle_waiting(false), idle_flags(0),
num_subscriptions(0)
{
TimeoutMonitor::ScheduleSeconds(client_timeout);
}
void
client_new(EventLoop &loop, Partition &partition,
int fd, SocketAddress address, int uid)
{
static unsigned int next_client_num;
const auto remote = sockaddr_to_string(address);
assert(fd >= 0);
#ifdef HAVE_LIBWRAP
if (address.GetFamily() != AF_UNIX) {
// TODO: shall we obtain the program name from argv[0]?
const char *progname = "mpd";
struct request_info req;
request_init(&req, RQ_FILE, fd, 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());
close_socket(fd);
return;
}
}
#endif /* HAVE_WRAP */
ClientList &client_list = *partition.instance.client_list;
if (client_list.IsFull()) {
LogWarning(client_domain, "Max connections reached");
close_socket(fd);
return;
}
Client *client = new Client(loop, partition, fd, uid,
next_client_num++);
(void)send(fd, GREETING, sizeof(GREETING) - 1, 0);
client_list.Add(*client);
FormatInfo(client_domain, "[%u] opened from %s",
client->num, remote.c_str());
}
void
Client::Close()
{
partition.instance.client_list->Remove(*this);
SetExpired();
FormatInfo(client_domain, "[%u] closed", num);
delete this;
}
|
