2010-10-05 20:29:41 +02:00
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/*
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2013-01-15 21:42:55 +01:00
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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2010-10-05 20:29:41 +02:00
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* http://www.musicpd.org
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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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*
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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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*/
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#include "config.h"
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2010-12-26 23:38:31 +01:00
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#ifdef HAVE_STRUCT_UCRED
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#define _GNU_SOURCE 1
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#endif
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2013-01-15 21:42:55 +01:00
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#include "ServerSocket.hxx"
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2013-01-15 22:39:51 +01:00
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#include "SocketUtil.hxx"
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2013-01-15 22:27:24 +01:00
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#include "SocketError.hxx"
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2013-01-15 22:50:49 +01:00
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#include "event/SocketMonitor.hxx"
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2011-09-20 07:56:59 +02:00
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#include "resolver.h"
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2010-10-05 20:29:41 +02:00
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#include "fd_util.h"
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2013-01-15 21:42:55 +01:00
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#include <forward_list>
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2010-10-05 20:29:41 +02:00
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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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#include <unistd.h>
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#include <stdlib.h>
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#include <assert.h>
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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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#include <netinet/in.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <netdb.h>
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#endif
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "listen"
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#define DEFAULT_PORT 6600
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2013-01-15 22:50:49 +01:00
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struct OneServerSocket final : private SocketMonitor {
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2013-01-15 21:42:55 +01:00
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const server_socket &parent;
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2010-10-05 20:29:41 +02:00
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2013-01-15 21:42:55 +01:00
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const unsigned serial;
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2010-10-05 20:29:41 +02:00
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char *path;
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size_t address_length;
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2013-01-15 21:42:55 +01:00
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struct sockaddr *address;
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2013-01-15 22:50:49 +01:00
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OneServerSocket(EventLoop &_loop, const server_socket &_parent,
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unsigned _serial,
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2013-01-15 21:42:55 +01:00
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const struct sockaddr *_address,
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size_t _address_length)
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2013-01-15 22:50:49 +01:00
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:SocketMonitor(_loop),
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parent(_parent), serial(_serial),
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2013-01-15 21:42:55 +01:00
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path(nullptr),
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address_length(_address_length),
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address((sockaddr *)g_memdup(_address, _address_length))
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{
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assert(_address != nullptr);
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assert(_address_length > 0);
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}
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OneServerSocket(const OneServerSocket &other) = delete;
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OneServerSocket &operator=(const OneServerSocket &other) = delete;
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~OneServerSocket() {
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g_free(path);
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g_free(address);
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}
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bool Open(GError **error_r);
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2013-01-15 22:50:49 +01:00
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using SocketMonitor::Close;
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2013-01-15 21:42:55 +01:00
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char *ToString() const;
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2013-01-15 22:50:49 +01:00
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void SetFD(int _fd) {
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SocketMonitor::Open(_fd);
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SocketMonitor::ScheduleRead();
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}
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2013-01-15 22:53:14 +01:00
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void Accept();
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2013-01-15 22:50:49 +01:00
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private:
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2013-01-30 10:53:32 +01:00
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virtual bool OnSocketReady(unsigned flags) override;
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2010-10-05 20:29:41 +02:00
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};
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struct server_socket {
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2013-01-15 22:50:49 +01:00
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EventLoop &loop;
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2010-10-05 20:29:41 +02:00
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server_socket_callback_t callback;
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void *callback_ctx;
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2013-01-15 21:42:55 +01:00
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std::forward_list<OneServerSocket> sockets;
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2010-10-05 20:29:41 +02:00
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unsigned next_serial;
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2013-01-15 21:42:55 +01:00
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2013-01-15 22:50:49 +01:00
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server_socket(EventLoop &_loop,
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server_socket_callback_t _callback, void *_callback_ctx)
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:loop(_loop),
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callback(_callback), callback_ctx(_callback_ctx),
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2013-01-15 21:42:55 +01:00
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next_serial(1) {}
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void Close();
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2010-10-05 20:29:41 +02:00
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};
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static GQuark
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server_socket_quark(void)
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{
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return g_quark_from_static_string("server_socket");
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}
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struct server_socket *
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2013-01-15 22:50:49 +01:00
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server_socket_new(EventLoop &loop,
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server_socket_callback_t callback, void *callback_ctx)
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2010-10-05 20:29:41 +02:00
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{
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2013-01-15 22:50:49 +01:00
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return new server_socket(loop, callback, callback_ctx);
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2010-10-05 20:29:41 +02:00
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}
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void
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server_socket_free(struct server_socket *ss)
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{
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2013-01-15 21:42:55 +01:00
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delete ss;
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2010-10-05 20:29:41 +02:00
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}
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/**
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* Wraper for sockaddr_to_string() which never fails.
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*/
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2013-01-15 21:42:55 +01:00
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char *
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OneServerSocket::ToString() const
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2010-10-05 20:29:41 +02:00
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{
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2013-01-15 21:42:55 +01:00
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char *p = sockaddr_to_string(address, address_length, nullptr);
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if (p == nullptr)
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2010-10-05 20:29:41 +02:00
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p = g_strdup("[unknown]");
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return p;
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}
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static int
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get_remote_uid(int fd)
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{
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#ifdef HAVE_STRUCT_UCRED
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struct ucred cred;
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socklen_t len = sizeof (cred);
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if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &cred, &len) < 0)
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return 0;
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return cred.uid;
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#else
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#ifdef HAVE_GETPEEREID
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uid_t euid;
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gid_t egid;
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if (getpeereid(fd, &euid, &egid) == 0)
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return euid;
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#else
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(void)fd;
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#endif
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return -1;
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#endif
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}
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2013-01-15 22:53:14 +01:00
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inline void
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OneServerSocket::Accept()
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{
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struct sockaddr_storage peer_address;
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size_t peer_address_length = sizeof(peer_address);
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int peer_fd =
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2013-01-15 22:50:49 +01:00
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accept_cloexec_nonblock(Get(), (struct sockaddr*)&peer_address,
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2013-01-15 22:53:14 +01:00
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&peer_address_length);
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if (peer_fd < 0) {
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const SocketErrorMessage msg;
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g_warning("accept() failed: %s", (const char *)msg);
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return;
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}
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if (socket_keepalive(peer_fd)) {
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const SocketErrorMessage msg;
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g_warning("Could not set TCP keepalive option: %s",
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(const char *)msg);
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}
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parent.callback(peer_fd,
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(const struct sockaddr*)&peer_address,
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peer_address_length, get_remote_uid(peer_fd),
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parent.callback_ctx);
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}
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2013-01-30 10:53:32 +01:00
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bool
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2013-01-15 22:50:49 +01:00
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OneServerSocket::OnSocketReady(gcc_unused unsigned flags)
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2012-02-13 21:10:36 +01:00
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{
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2013-01-15 22:50:49 +01:00
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Accept();
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2013-01-30 10:53:32 +01:00
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return true;
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2012-02-13 21:10:36 +01:00
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}
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2013-01-15 21:42:55 +01:00
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inline bool
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OneServerSocket::Open(GError **error_r)
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{
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2013-01-15 22:50:49 +01:00
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assert(!IsDefined());
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2013-01-15 21:42:55 +01:00
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int _fd = socket_bind_listen(address->sa_family,
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SOCK_STREAM, 0,
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address, address_length, 5,
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error_r);
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if (_fd < 0)
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return false;
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/* allow everybody to connect */
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if (path != nullptr)
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chmod(path, 0666);
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/* register in the GLib main loop */
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SetFD(_fd);
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return true;
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}
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2010-10-05 20:29:41 +02:00
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bool
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server_socket_open(struct server_socket *ss, GError **error_r)
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{
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2013-01-15 21:42:55 +01:00
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struct OneServerSocket *good = nullptr, *bad = nullptr;
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GError *last_error = nullptr;
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2010-10-05 20:29:41 +02:00
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2013-01-15 21:42:55 +01:00
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for (auto &i : ss->sockets) {
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assert(i.serial > 0);
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assert(good == nullptr || i.serial <= good->serial);
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2010-10-05 20:29:41 +02:00
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2013-01-15 21:42:55 +01:00
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if (bad != nullptr && i.serial != bad->serial) {
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2010-10-05 20:29:41 +02:00
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server_socket_close(ss);
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g_propagate_error(error_r, last_error);
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return false;
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}
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2013-01-15 21:42:55 +01:00
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GError *error = nullptr;
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if (!i.Open(&error)) {
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if (good != nullptr && good->serial == i.serial) {
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char *address_string = i.ToString();
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char *good_string = good->ToString();
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2010-10-05 20:29:41 +02:00
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g_warning("bind to '%s' failed: %s "
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"(continuing anyway, because "
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"binding to '%s' succeeded)",
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address_string, error->message,
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good_string);
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g_free(address_string);
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g_free(good_string);
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g_error_free(error);
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2013-01-15 21:42:55 +01:00
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} else if (bad == nullptr) {
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bad = &i;
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2010-10-05 20:29:41 +02:00
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2013-01-15 21:42:55 +01:00
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char *address_string = i.ToString();
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2010-10-05 20:29:41 +02:00
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g_propagate_prefixed_error(&last_error, error,
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"Failed to bind to '%s': ",
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address_string);
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g_free(address_string);
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} else
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g_error_free(error);
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continue;
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}
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/* mark this socket as "good", and clear previous
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errors */
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2013-01-15 21:42:55 +01:00
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good = &i;
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2010-10-05 20:29:41 +02:00
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2013-01-15 21:42:55 +01:00
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if (bad != nullptr) {
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bad = nullptr;
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2010-10-05 20:29:41 +02:00
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g_error_free(last_error);
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2013-01-15 21:42:55 +01:00
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last_error = nullptr;
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2010-10-05 20:29:41 +02:00
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}
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}
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2013-01-15 21:42:55 +01:00
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if (bad != nullptr) {
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2010-10-05 20:29:41 +02:00
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server_socket_close(ss);
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g_propagate_error(error_r, last_error);
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return false;
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}
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return true;
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}
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2013-01-15 21:42:55 +01:00
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void
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server_socket::Close()
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{
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for (auto &i : sockets)
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i.Close();
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}
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void
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server_socket_close(struct server_socket *ss)
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{
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ss->Close();
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2010-10-05 20:29:41 +02:00
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}
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2013-01-15 21:42:55 +01:00
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static OneServerSocket &
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server_socket_add_address(struct server_socket *ss,
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const struct sockaddr *address,
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size_t address_length)
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2010-10-05 20:29:41 +02:00
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{
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2013-01-15 21:42:55 +01:00
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assert(ss != nullptr);
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2013-01-15 22:50:49 +01:00
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ss->sockets.emplace_front(ss->loop, *ss, ss->next_serial,
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2013-01-15 21:42:55 +01:00
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address, address_length);
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return ss->sockets.front();
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2010-10-05 20:29:41 +02:00
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}
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2012-02-13 20:58:57 +01:00
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bool
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server_socket_add_fd(struct server_socket *ss, int fd, GError **error_r)
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{
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2013-01-15 21:42:55 +01:00
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assert(ss != nullptr);
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2012-02-13 20:58:57 +01:00
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assert(fd >= 0);
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struct sockaddr_storage address;
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socklen_t address_length;
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if (getsockname(fd, (struct sockaddr *)&address,
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&address_length) < 0) {
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2013-01-15 22:27:24 +01:00
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SetSocketError(error_r);
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g_prefix_error(error_r, "Failed to get socket address");
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2012-02-13 20:58:57 +01:00
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return false;
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}
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2013-01-15 21:42:55 +01:00
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OneServerSocket &s =
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|
|
server_socket_add_address(ss, (struct sockaddr *)&address,
|
|
|
|
address_length);
|
|
|
|
s.SetFD(fd);
|
2012-02-13 20:58:57 +01:00
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
2010-10-05 20:29:41 +02:00
|
|
|
#ifdef HAVE_TCP
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Add a listener on a port on all IPv4 interfaces.
|
|
|
|
*
|
|
|
|
* @param port the TCP port
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
server_socket_add_port_ipv4(struct server_socket *ss, unsigned port)
|
|
|
|
{
|
|
|
|
struct sockaddr_in sin;
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
|
|
sin.sin_port = htons(port);
|
|
|
|
sin.sin_family = AF_INET;
|
|
|
|
sin.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
|
|
|
|
server_socket_add_address(ss, (const struct sockaddr *)&sin,
|
|
|
|
sizeof(sin));
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef HAVE_IPV6
|
|
|
|
/**
|
|
|
|
* Add a listener on a port on all IPv6 interfaces.
|
|
|
|
*
|
|
|
|
* @param port the TCP port
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
server_socket_add_port_ipv6(struct server_socket *ss, unsigned port)
|
|
|
|
{
|
|
|
|
struct sockaddr_in6 sin;
|
|
|
|
memset(&sin, 0, sizeof(sin));
|
|
|
|
sin.sin6_port = htons(port);
|
|
|
|
sin.sin6_family = AF_INET6;
|
|
|
|
|
|
|
|
server_socket_add_address(ss, (const struct sockaddr *)&sin,
|
|
|
|
sizeof(sin));
|
|
|
|
}
|
|
|
|
#endif /* HAVE_IPV6 */
|
|
|
|
|
|
|
|
#endif /* HAVE_TCP */
|
|
|
|
|
|
|
|
bool
|
|
|
|
server_socket_add_port(struct server_socket *ss, unsigned port,
|
|
|
|
GError **error_r)
|
|
|
|
{
|
|
|
|
#ifdef HAVE_TCP
|
|
|
|
if (port == 0 || port > 0xffff) {
|
|
|
|
g_set_error(error_r, server_socket_quark(), 0,
|
|
|
|
"Invalid TCP port");
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef HAVE_IPV6
|
|
|
|
server_socket_add_port_ipv6(ss, port);
|
|
|
|
#endif
|
|
|
|
server_socket_add_port_ipv4(ss, port);
|
|
|
|
|
|
|
|
++ss->next_serial;
|
|
|
|
|
|
|
|
return true;
|
|
|
|
#else /* HAVE_TCP */
|
|
|
|
(void)ss;
|
|
|
|
(void)port;
|
|
|
|
|
|
|
|
g_set_error(error_r, server_socket_quark(), 0,
|
|
|
|
"TCP support is disabled");
|
|
|
|
return false;
|
|
|
|
#endif /* HAVE_TCP */
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
server_socket_add_host(struct server_socket *ss, const char *hostname,
|
|
|
|
unsigned port, GError **error_r)
|
|
|
|
{
|
|
|
|
#ifdef HAVE_TCP
|
2011-09-20 20:52:49 +02:00
|
|
|
struct addrinfo *ai = resolve_host_port(hostname, port,
|
|
|
|
AI_PASSIVE, SOCK_STREAM,
|
|
|
|
error_r);
|
2013-01-15 21:42:55 +01:00
|
|
|
if (ai == nullptr)
|
2010-10-05 20:29:41 +02:00
|
|
|
return false;
|
|
|
|
|
2013-01-15 21:42:55 +01:00
|
|
|
for (const struct addrinfo *i = ai; i != nullptr; i = i->ai_next)
|
2010-10-05 20:29:41 +02:00
|
|
|
server_socket_add_address(ss, i->ai_addr, i->ai_addrlen);
|
|
|
|
|
|
|
|
freeaddrinfo(ai);
|
|
|
|
|
|
|
|
++ss->next_serial;
|
|
|
|
|
|
|
|
return true;
|
|
|
|
#else /* HAVE_TCP */
|
|
|
|
(void)ss;
|
|
|
|
(void)hostname;
|
|
|
|
(void)port;
|
|
|
|
|
|
|
|
g_set_error(error_r, server_socket_quark(), 0,
|
|
|
|
"TCP support is disabled");
|
|
|
|
return false;
|
|
|
|
#endif /* HAVE_TCP */
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
server_socket_add_path(struct server_socket *ss, const char *path,
|
|
|
|
GError **error_r)
|
|
|
|
{
|
|
|
|
#ifdef HAVE_UN
|
|
|
|
struct sockaddr_un s_un;
|
|
|
|
|
|
|
|
size_t path_length = strlen(path);
|
|
|
|
if (path_length >= sizeof(s_un.sun_path)) {
|
|
|
|
g_set_error(error_r, server_socket_quark(), 0,
|
|
|
|
"UNIX socket path is too long");
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
unlink(path);
|
|
|
|
|
|
|
|
s_un.sun_family = AF_UNIX;
|
|
|
|
memcpy(s_un.sun_path, path, path_length + 1);
|
|
|
|
|
2013-01-15 21:42:55 +01:00
|
|
|
OneServerSocket &s =
|
2010-10-05 20:29:41 +02:00
|
|
|
server_socket_add_address(ss, (const struct sockaddr *)&s_un,
|
|
|
|
sizeof(s_un));
|
2013-01-15 21:42:55 +01:00
|
|
|
s.path = g_strdup(path);
|
2010-10-05 20:29:41 +02:00
|
|
|
|
|
|
|
return true;
|
|
|
|
#else /* !HAVE_UN */
|
|
|
|
(void)ss;
|
|
|
|
(void)path;
|
|
|
|
|
|
|
|
g_set_error(error_r, server_socket_quark(), 0,
|
|
|
|
"UNIX domain socket support is disabled");
|
|
|
|
return false;
|
|
|
|
#endif /* !HAVE_UN */
|
|
|
|
}
|
|
|
|
|