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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* Copyright (C) 2003-2013 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 "fd_util.h"
extern "C" {
#include "fifo_buffer.h"
#include "resolver.h"
}
#include "Permission.hxx"
#include "glib_socket.h"
#include <assert.h>
#include <sys/types.h>
#ifdef WIN32
#include <winsock2.h>
#else
#include <sys/socket.h>
#endif
#include <unistd.h>
#ifdef HAVE_LIBWRAP
#include <tcpd.h>
#endif
#define LOG_LEVEL_SECURE G_LOG_LEVEL_INFO
static const char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
void
client_new(struct player_control *player_control,
int fd, const struct sockaddr *sa, size_t sa_length, int uid)
{
static unsigned int next_client_num;
char *remote;
assert(player_control != NULL);
assert(fd >= 0);
#ifdef HAVE_LIBWRAP
if (sa->sa_family != AF_UNIX) {
char *hostaddr = sockaddr_to_string(sa, sa_length, NULL);
const char *progname = g_get_prgname();
struct request_info req;
request_init(&req, RQ_FILE, fd, RQ_DAEMON, progname, 0);
fromhost(&req);
if (!hosts_access(&req)) {
/* tcp wrappers says no */
g_log(G_LOG_DOMAIN, LOG_LEVEL_SECURE,
"libwrap refused connection (libwrap=%s) from %s",
progname, hostaddr);
g_free(hostaddr);
close_socket(fd);
return;
}
g_free(hostaddr);
}
#endif /* HAVE_WRAP */
if (client_list_is_full()) {
g_warning("Max Connections Reached!");
close_socket(fd);
return;
}
Client *client = new Client();
client->player_control = player_control;
client->channel = g_io_channel_new_socket(fd);
/* GLib is responsible for closing the file descriptor */
g_io_channel_set_close_on_unref(client->channel, true);
/* NULL encoding means the stream is binary safe; the MPD
protocol is UTF-8 only, but we are doing this call anyway
to prevent GLib from messing around with the stream */
g_io_channel_set_encoding(client->channel, NULL, NULL);
/* we prefer to do buffering */
g_io_channel_set_buffered(client->channel, false);
client->source_id = g_io_add_watch(client->channel,
GIOCondition(G_IO_IN|G_IO_ERR|G_IO_HUP),
client_in_event, client);
client->input = fifo_buffer_new(4096);
client->permission = getDefaultPermissions();
client->uid = uid;
client->last_activity = g_timer_new();
client->cmd_list = NULL;
client->cmd_list_OK = -1;
client->cmd_list_size = 0;
client->deferred_send = g_queue_new();
client->deferred_bytes = 0;
client->num = next_client_num++;
client->send_buf_used = 0;
(void)send(fd, GREETING, sizeof(GREETING) - 1, 0);
client_list_add(client);
remote = sockaddr_to_string(sa, sa_length, NULL);
g_log(G_LOG_DOMAIN, LOG_LEVEL_SECURE,
"[%u] opened from %s", client->num, remote);
g_free(remote);
}
static void
deferred_buffer_free(gpointer data, G_GNUC_UNUSED gpointer user_data)
{
struct deferred_buffer *buffer = (struct deferred_buffer *)data;
g_free(buffer);
}
void
client_close(Client *client)
{
client_list_remove(client);
client_set_expired(client);
g_timer_destroy(client->last_activity);
if (client->cmd_list) {
free_cmd_list(client->cmd_list);
client->cmd_list = NULL;
}
g_queue_foreach(client->deferred_send, deferred_buffer_free, NULL);
g_queue_free(client->deferred_send);
fifo_buffer_free(client->input);
g_log(G_LOG_DOMAIN, LOG_LEVEL_SECURE,
"[%u] closed", client->num);
delete client;
}
|
