2009-03-13 18:43:16 +01:00
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/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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2004-02-24 00:41:20 +01:00
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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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2009-03-13 18:43:16 +01:00
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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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2004-02-24 00:41:20 +01:00
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*/
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#include "listen.h"
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2009-03-14 18:29:38 +01:00
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#include "socket_util.h"
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2008-08-28 20:02:43 +02:00
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#include "client.h"
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2004-02-24 00:41:20 +01:00
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#include "conf.h"
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2004-05-15 23:19:43 +02:00
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#include "utils.h"
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2008-12-29 17:28:32 +01:00
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#include "config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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2009-01-03 14:51:43 +01:00
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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2009-02-24 18:36:31 +01:00
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#include <assert.h>
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2008-12-30 19:07:10 +01:00
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#ifdef WIN32
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#include <ws2tcpip.h>
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#include <winsock.h>
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#else
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2008-12-29 17:28:32 +01:00
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#include <netinet/in.h>
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2009-01-16 16:04:20 +01:00
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#include <sys/socket.h>
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2008-12-29 17:28:32 +01:00
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#include <sys/un.h>
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#include <netdb.h>
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2008-12-30 19:07:10 +01:00
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#endif
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2008-04-12 06:19:26 +02:00
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2008-12-29 17:29:04 +01:00
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "listen"
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2005-03-06 20:00:58 +01:00
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#define DEFAULT_PORT 6600
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2004-02-24 00:41:20 +01:00
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2009-01-10 18:55:29 +01:00
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struct listen_socket {
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struct listen_socket *next;
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int fd;
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2009-01-10 18:55:33 +01:00
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guint source_id;
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2009-01-10 18:55:29 +01:00
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};
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static struct listen_socket *listen_sockets;
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2009-02-24 17:42:36 +01:00
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int listen_port;
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2004-02-24 00:41:20 +01:00
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2009-02-24 17:43:10 +01:00
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static GQuark
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listen_quark(void)
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{
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return g_quark_from_static_string("listen");
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}
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2008-12-30 19:24:39 +01:00
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static gboolean
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listen_in_event(GIOChannel *source, GIOCondition condition, gpointer data);
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2009-02-24 17:43:10 +01:00
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static bool
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listen_add_address(int pf, const struct sockaddr *addrp, socklen_t addrlen,
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GError **error)
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2006-07-19 20:56:54 +02:00
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{
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2009-06-10 07:48:50 +02:00
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char *address_string;
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2009-03-14 18:29:38 +01:00
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int fd;
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2009-01-10 18:55:29 +01:00
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struct listen_socket *ls;
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2008-12-30 19:24:39 +01:00
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GIOChannel *channel;
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2006-07-19 20:56:54 +02:00
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2009-06-10 07:48:50 +02:00
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address_string = sockaddr_to_string(addrp, addrlen, NULL);
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if (address_string != NULL) {
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g_debug("binding to socket address %s", address_string);
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g_free(address_string);
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}
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2009-03-14 18:29:38 +01:00
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fd = socket_bind_listen(pf, SOCK_STREAM, 0, addrp, addrlen, 5, error);
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if (fd < 0)
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2009-02-24 17:43:10 +01:00
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return false;
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2008-10-15 22:34:21 +02:00
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2009-01-10 18:55:29 +01:00
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ls = g_new(struct listen_socket, 1);
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2009-02-24 17:43:10 +01:00
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ls->fd = fd;
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2006-07-22 15:15:20 +02:00
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2009-02-24 17:43:10 +01:00
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channel = g_io_channel_unix_new(fd);
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2009-01-10 18:55:33 +01:00
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ls->source_id = g_io_add_watch(channel, G_IO_IN,
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2009-02-24 17:43:10 +01:00
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listen_in_event, GINT_TO_POINTER(fd));
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2008-12-30 19:24:39 +01:00
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g_io_channel_unref(channel);
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2009-01-10 18:55:29 +01:00
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ls->next = listen_sockets;
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listen_sockets = ls;
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2009-02-24 17:43:10 +01:00
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return true;
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2006-07-19 20:56:54 +02:00
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}
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2009-02-24 18:49:09 +01:00
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#ifdef HAVE_TCP
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/**
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* Add a listener on a port on all IPv4 interfaces.
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*
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* @param port the TCP port
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* @param error location to store the error occuring, or NULL to ignore errors
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* @return true on success
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*/
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static bool
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listen_add_port_ipv4(unsigned int port, GError **error)
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{
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struct sockaddr_in sin;
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const struct sockaddr *addrp = (const struct sockaddr *)&sin;
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socklen_t addrlen = sizeof(sin);
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memset(&sin, 0, sizeof(sin));
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sin.sin_port = htons(port);
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = INADDR_ANY;
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return listen_add_address(PF_INET, addrp, addrlen, error);
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}
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#ifdef HAVE_IPV6
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/**
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* Add a listener on a port on all IPv6 interfaces.
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*
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* @param port the TCP port
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* @param error location to store the error occuring, or NULL to ignore errors
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* @return true on success
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*/
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static bool
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listen_add_port_ipv6(unsigned int port, GError **error)
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{
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struct sockaddr_in6 sin;
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const struct sockaddr *addrp = (const struct sockaddr *)&sin;
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socklen_t addrlen = sizeof(sin);
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memset(&sin, 0, sizeof(sin));
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sin.sin6_port = htons(port);
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sin.sin6_family = AF_INET6;
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return listen_add_address(PF_INET6, addrp, addrlen, error);
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}
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#endif /* HAVE_IPV6 */
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#endif /* HAVE_TCP */
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2009-02-24 17:51:32 +01:00
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/**
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* Add a listener on a port on all interfaces.
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*
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* @param port the TCP port
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* @param error location to store the error occuring, or NULL to ignore errors
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* @return true on success
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*/
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2009-02-24 17:43:10 +01:00
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static bool
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2009-02-24 17:51:32 +01:00
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listen_add_port(unsigned int port, GError **error)
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2006-07-20 18:02:40 +02:00
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{
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2009-02-24 17:51:32 +01:00
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#ifdef HAVE_TCP
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2009-02-24 17:43:10 +01:00
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bool success;
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2004-02-24 00:41:20 +01:00
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#ifdef HAVE_IPV6
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2009-02-24 18:55:12 +01:00
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bool success6;
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GError *error2 = NULL;
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2004-02-24 00:41:20 +01:00
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#endif
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2004-10-28 07:14:55 +02:00
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2009-02-24 17:51:32 +01:00
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g_debug("binding to any address");
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2009-02-24 18:49:09 +01:00
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2006-07-22 19:19:59 +02:00
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#ifdef HAVE_IPV6
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2009-02-24 18:55:12 +01:00
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success6 = listen_add_port_ipv6(port, &error2);
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if (!success6) {
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if (error2->domain != listen_quark() ||
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(error2->code != EAFNOSUPPORT && error2->code != EINVAL &&
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error2->code != EPROTONOSUPPORT)) {
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g_propagate_error(error, error2);
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2009-02-24 17:51:32 +01:00
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return false;
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2009-02-24 18:55:12 +01:00
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}
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/* although MPD was compiled with IPv6 support, this
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host does not have it - ignore this error */
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g_error_free(error2);
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2009-02-24 17:51:32 +01:00
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}
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2006-07-22 19:19:59 +02:00
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#endif
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2009-02-24 17:43:10 +01:00
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2009-02-24 18:49:09 +01:00
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success = listen_add_port_ipv4(port, error);
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2009-02-24 17:51:32 +01:00
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if (!success) {
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2006-07-22 19:19:59 +02:00
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#ifdef HAVE_IPV6
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2009-02-24 18:55:12 +01:00
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if (success6)
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2009-02-24 17:51:32 +01:00
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/* non-critical: IPv6 listener is
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already set up */
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g_clear_error(error);
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else
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2006-07-22 19:19:59 +02:00
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#endif
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2009-02-24 17:51:32 +01:00
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return false;
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}
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2009-02-24 17:43:10 +01:00
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2009-02-24 17:51:32 +01:00
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return true;
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2008-04-12 06:07:24 +02:00
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#else /* HAVE_TCP */
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2009-02-24 17:51:32 +01:00
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(void)port;
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g_set_error(error, listen_quark(), 0,
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"TCP support is disabled");
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return false;
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2008-04-12 06:07:24 +02:00
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#endif /* HAVE_TCP */
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2009-02-24 17:51:32 +01:00
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}
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2009-02-24 18:29:53 +01:00
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/**
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* Resolves a host name, and adds listeners on all addresses in the
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* result set.
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*
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* @param hostname the host name to be resolved
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* @param port the TCP port
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* @param error location to store the error occuring, or NULL to ignore errors
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* @return true on success
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*/
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static bool
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listen_add_host(const char *hostname, unsigned port, GError **error)
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{
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#ifdef HAVE_TCP
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struct addrinfo hints, *ai, *i;
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char service[20];
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int ret;
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bool success;
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g_debug("binding to address for %s", hostname);
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memset(&hints, 0, sizeof(hints));
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hints.ai_flags = AI_PASSIVE;
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#ifdef AI_ADDRCONFIG
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hints.ai_flags |= AI_ADDRCONFIG;
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#endif
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hints.ai_family = PF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_protocol = IPPROTO_TCP;
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g_snprintf(service, sizeof(service), "%u", port);
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ret = getaddrinfo(hostname, service, &hints, &ai);
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if (ret != 0) {
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g_set_error(error, listen_quark(), ret,
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"Failed to look up host \"%s\": %s",
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hostname, gai_strerror(ret));
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return false;
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}
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for (i = ai; i != NULL; i = i->ai_next) {
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success = listen_add_address(i->ai_family, i->ai_addr,
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i->ai_addrlen, error);
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if (!success)
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return false;
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}
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freeaddrinfo(ai);
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return true;
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#else /* HAVE_TCP */
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2009-02-24 19:06:31 +01:00
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(void)hostname;
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(void)port;
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2009-02-24 18:29:53 +01:00
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g_set_error(error, listen_quark(), 0,
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"TCP support is disabled");
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return false;
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#endif /* HAVE_TCP */
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}
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2009-02-24 17:51:39 +01:00
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#ifdef HAVE_UN
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/**
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* Add a listener on a Unix domain socket.
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*
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* @param path the absolute socket path
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* @param error location to store the error occuring, or NULL to ignore errors
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* @return true on success
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*/
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2009-02-24 17:51:32 +01:00
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static bool
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2009-02-24 17:51:39 +01:00
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listen_add_path(const char *path, GError **error)
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2009-02-24 17:51:32 +01:00
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{
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2009-02-24 17:51:39 +01:00
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size_t path_length;
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struct sockaddr_un s_un;
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const struct sockaddr *addrp = (const struct sockaddr *)&s_un;
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socklen_t addrlen = sizeof(s_un);
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2009-02-24 17:51:32 +01:00
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bool success;
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2009-02-24 17:51:39 +01:00
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path_length = strlen(path);
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2009-03-01 13:35:44 +01:00
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if (path_length >= sizeof(s_un.sun_path)) {
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g_set_error(error, listen_quark(), 0,
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"unix socket path is too long");
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return false;
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}
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2008-04-12 06:07:18 +02:00
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2009-02-24 17:51:39 +01:00
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unlink(path);
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2008-04-12 06:07:18 +02:00
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2009-02-24 17:51:39 +01:00
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s_un.sun_family = AF_UNIX;
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memcpy(s_un.sun_path, path, path_length + 1);
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2008-04-12 06:20:56 +02:00
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2009-02-24 17:51:39 +01:00
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success = listen_add_address(PF_UNIX, addrp, addrlen, error);
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if (!success)
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return false;
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2008-04-12 06:07:18 +02:00
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2009-02-24 17:51:39 +01:00
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/* allow everybody to connect */
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chmod(path, 0666);
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2008-04-12 06:07:18 +02:00
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2009-02-24 17:51:39 +01:00
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return true;
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}
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#endif /* HAVE_UN */
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2008-10-30 18:03:18 +01:00
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2009-02-24 17:51:39 +01:00
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static bool
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listen_add_config_param(unsigned int port,
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const struct config_param *param,
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GError **error)
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{
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2009-02-24 18:36:31 +01:00
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assert(param != NULL);
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if (0 == strcmp(param->value, "any")) {
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2009-02-24 17:51:39 +01:00
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return listen_add_port(port, error);
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#ifdef HAVE_UN
|
|
|
|
} else if (param->value[0] == '/') {
|
|
|
|
return listen_add_path(param->value, error);
|
2008-04-12 06:07:24 +02:00
|
|
|
#endif /* HAVE_UN */
|
2006-07-20 18:02:40 +02:00
|
|
|
} else {
|
2009-02-24 18:29:53 +01:00
|
|
|
return listen_add_host(param->value, port, error);
|
2004-02-24 00:41:20 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-02-24 17:42:36 +01:00
|
|
|
void listen_global_init(void)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2009-01-21 08:48:02 +01:00
|
|
|
int port = config_get_positive(CONF_PORT, DEFAULT_PORT);
|
2009-01-25 16:03:49 +01:00
|
|
|
const struct config_param *param =
|
2009-01-17 20:23:27 +01:00
|
|
|
config_get_next_param(CONF_BIND_TO_ADDRESS, NULL);
|
2009-02-24 17:43:10 +01:00
|
|
|
bool success;
|
|
|
|
GError *error = NULL;
|
2007-01-11 21:41:17 +01:00
|
|
|
|
2009-02-24 18:36:31 +01:00
|
|
|
if (param != NULL) {
|
|
|
|
/* "bind_to_address" is configured, create listeners
|
|
|
|
for all values */
|
|
|
|
|
|
|
|
do {
|
|
|
|
success = listen_add_config_param(port, param, &error);
|
|
|
|
if (!success)
|
2009-02-24 17:43:10 +01:00
|
|
|
g_error("Failed to listen on %s (line %i): %s",
|
|
|
|
param->value, param->line,
|
|
|
|
error->message);
|
2009-02-24 18:36:31 +01:00
|
|
|
|
|
|
|
param = config_get_next_param(CONF_BIND_TO_ADDRESS,
|
|
|
|
param);
|
|
|
|
} while (param != NULL);
|
|
|
|
} else {
|
|
|
|
/* no "bind_to_address" configured, bind the
|
|
|
|
configured port on all interfaces */
|
|
|
|
|
|
|
|
success = listen_add_port(port, &error);
|
|
|
|
if (!success)
|
|
|
|
g_error("Failed to listen on *:%d: %s",
|
|
|
|
port, error->message);
|
|
|
|
}
|
|
|
|
|
2009-02-24 17:42:36 +01:00
|
|
|
listen_port = port;
|
2004-11-03 20:42:54 +01:00
|
|
|
}
|
|
|
|
|
2009-02-24 17:42:36 +01:00
|
|
|
void listen_global_finish(void)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2009-02-24 17:42:36 +01:00
|
|
|
g_debug("listen_global_finish called");
|
2004-11-03 20:42:54 +01:00
|
|
|
|
2009-01-10 18:55:29 +01:00
|
|
|
while (listen_sockets != NULL) {
|
|
|
|
struct listen_socket *ls = listen_sockets;
|
|
|
|
listen_sockets = ls->next;
|
2004-11-03 20:42:54 +01:00
|
|
|
|
2009-01-10 18:55:33 +01:00
|
|
|
g_source_remove(ls->source_id);
|
2009-01-10 18:55:29 +01:00
|
|
|
close(ls->fd);
|
|
|
|
g_free(ls);
|
|
|
|
}
|
2004-11-03 20:42:54 +01:00
|
|
|
}
|
|
|
|
|
2008-10-15 22:34:21 +02:00
|
|
|
static int get_remote_uid(int fd)
|
|
|
|
{
|
2008-10-18 18:21:49 +02:00
|
|
|
#ifdef HAVE_STRUCT_UCRED
|
2008-10-15 22:34:21 +02:00
|
|
|
struct ucred cred;
|
|
|
|
socklen_t len = sizeof (cred);
|
|
|
|
|
|
|
|
if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cred, &len) < 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return cred.uid;
|
|
|
|
#else
|
|
|
|
(void)fd;
|
|
|
|
return -1;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
2008-12-30 19:24:39 +01:00
|
|
|
static gboolean
|
|
|
|
listen_in_event(G_GNUC_UNUSED GIOChannel *source,
|
|
|
|
G_GNUC_UNUSED GIOCondition condition,
|
|
|
|
gpointer data)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2008-12-30 19:24:39 +01:00
|
|
|
int listen_fd = GPOINTER_TO_INT(data), fd;
|
2009-02-28 15:20:35 +01:00
|
|
|
struct sockaddr_storage sa;
|
|
|
|
socklen_t sa_length = sizeof(sa);
|
2004-02-24 00:41:20 +01:00
|
|
|
|
2009-02-28 15:20:35 +01:00
|
|
|
fd = accept(listen_fd, (struct sockaddr*)&sa, &sa_length);
|
2008-12-30 19:24:39 +01:00
|
|
|
if (fd >= 0) {
|
2009-01-03 13:44:19 +01:00
|
|
|
set_nonblocking(fd);
|
|
|
|
|
2009-02-28 15:20:35 +01:00
|
|
|
client_new(fd, (struct sockaddr*)&sa, sa_length,
|
|
|
|
get_remote_uid(fd));
|
2008-12-30 19:24:39 +01:00
|
|
|
} else if (fd < 0 && errno != EINTR) {
|
|
|
|
g_warning("Problems accept()'ing");
|
2004-02-24 00:41:20 +01:00
|
|
|
}
|
2008-12-30 19:24:39 +01:00
|
|
|
|
|
|
|
return true;
|
2004-02-24 00:41:20 +01:00
|
|
|
}
|