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/*
* 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 "ClientList.hxx"
#include "Partition.hxx"
#include "fd_util.h"
#include "util/fifo_buffer.h"
extern "C" {
#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";
Client::Client(Partition &_partition,
int fd, int _uid, int _num)
:partition(_partition),
playlist(partition.playlist), player_control(&partition.pc),
input(fifo_buffer_new(4096)),
permission(getDefaultPermissions()),
uid(_uid),
last_activity(g_timer_new()),
num(_num),
output_buffer(16384, client_max_output_buffer_size),
idle_waiting(false), idle_flags(0),
num_subscriptions(0)
{
assert(fd >= 0);
channel = g_io_channel_new_socket(fd);
/* GLib is responsible for closing the file descriptor */
g_io_channel_set_close_on_unref(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(channel, NULL, NULL);
/* we prefer to do buffering */
g_io_channel_set_buffered(channel, false);
source_id = g_io_add_watch(channel,
GIOCondition(G_IO_IN|G_IO_ERR|G_IO_HUP),
client_in_event, this);
}
Client::~Client()
{
g_timer_destroy(last_activity);
fifo_buffer_free(input);
}
void
client_new(Partition &partition,
int fd, const struct sockaddr *sa, size_t sa_length, int uid)
{
static unsigned int next_client_num;
char *remote;
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(partition, fd, uid,
next_client_num++);
(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);
}
void
Client::Close()
{
client_list_remove(this);
SetExpired();
g_log(G_LOG_DOMAIN, LOG_LEVEL_SECURE, "[%u] closed", num);
delete this;
}
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