159 lines
3.8 KiB
C++
159 lines
3.8 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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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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#include "Listen.hxx"
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#include "client/Client.hxx"
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#include "config/Param.hxx"
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#include "config/ConfigGlobal.hxx"
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#include "config/ConfigOption.hxx"
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#include "net/SocketAddress.hxx"
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#include "event/ServerSocket.hxx"
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#include "system/Error.hxx"
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#include "util/RuntimeError.hxx"
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#include "util/Domain.hxx"
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#include "fs/AllocatedPath.hxx"
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#include "Log.hxx"
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#include <string.h>
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#include <assert.h>
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#ifdef ENABLE_SYSTEMD_DAEMON
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#include <systemd/sd-daemon.h>
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#endif
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static constexpr Domain listen_domain("listen");
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#define DEFAULT_PORT 6600
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class ClientListener final : public ServerSocket {
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Partition &partition;
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public:
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ClientListener(EventLoop &_loop, Partition &_partition)
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:ServerSocket(_loop), partition(_partition) {}
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private:
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void OnAccept(UniqueSocketDescriptor &&fd,
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SocketAddress address, int uid) override {
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client_new(GetEventLoop(), partition,
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std::move(fd), address, uid);
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}
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};
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static ClientListener *listen_socket;
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int listen_port;
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/**
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* Throws #std::runtime_error on error.
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*/
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static void
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listen_add_config_param(unsigned int port,
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const ConfigParam *param)
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{
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assert(param != nullptr);
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if (0 == strcmp(param->value.c_str(), "any")) {
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listen_socket->AddPort(port);
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} else if (param->value[0] == '/' || param->value[0] == '~') {
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listen_socket->AddPath(param->GetPath());
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} else {
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listen_socket->AddHost(param->value.c_str(), port);
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}
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}
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#ifdef ENABLE_SYSTEMD_DAEMON
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static bool
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listen_systemd_activation()
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{
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int n = sd_listen_fds(true);
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if (n <= 0) {
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if (n < 0)
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throw MakeErrno(-n, "sd_listen_fds() failed");
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return false;
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}
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for (int i = SD_LISTEN_FDS_START, end = SD_LISTEN_FDS_START + n;
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i != end; ++i)
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listen_socket->AddFD(i);
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return true;
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}
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#endif
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void
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listen_global_init(EventLoop &loop, Partition &partition)
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{
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int port = config_get_positive(ConfigOption::PORT, DEFAULT_PORT);
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const auto *param = config_get_param(ConfigOption::BIND_TO_ADDRESS);
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listen_socket = new ClientListener(loop, partition);
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#ifdef ENABLE_SYSTEMD_DAEMON
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if (listen_systemd_activation())
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return;
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#endif
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if (param != nullptr) {
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/* "bind_to_address" is configured, create listeners
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for all values */
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do {
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try {
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listen_add_config_param(port, param);
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} catch (const std::runtime_error &e) {
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delete listen_socket;
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std::throw_with_nested(FormatRuntimeError("Failed to listen on %s (line %i)",
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param->value.c_str(),
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param->line));
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}
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} while ((param = param->next) != nullptr);
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} else {
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/* no "bind_to_address" configured, bind the
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configured port on all interfaces */
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try {
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listen_socket->AddPort(port);
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} catch (const std::runtime_error &e) {
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delete listen_socket;
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std::throw_with_nested(FormatRuntimeError("Failed to listen on *:%d: ", port));
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}
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}
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try {
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listen_socket->Open();
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} catch (const std::runtime_error &e) {
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delete listen_socket;
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throw;
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}
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listen_port = port;
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}
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void listen_global_finish(void)
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{
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LogDebug(listen_domain, "listen_global_finish called");
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assert(listen_socket != nullptr);
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delete listen_socket;
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}
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