listen: convert to C++

src/Listen.cxx

@@ -0,0 +1,156 @@
+/*
+ * 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 "Listen.hxx"
+#include "Main.hxx"
+
+extern "C" {
+#include "server_socket.h"
+#include "client.h"
+#include "conf.h"
+}
+
+#include <string.h>
+#include <assert.h>
+
+#ifdef ENABLE_SYSTEMD_DAEMON
+#include <systemd/sd-daemon.h>
+#endif
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "listen"
+
+#define DEFAULT_PORT	6600
+
+static struct server_socket *listen_socket;
+int listen_port;
+
+static void
+listen_callback(int fd, const struct sockaddr *address,
+		size_t address_length, int uid, G_GNUC_UNUSED void *ctx)
+{
+	client_new(global_player_control, fd, address, address_length, uid);
+}
+
+static bool
+listen_add_config_param(unsigned int port,
+			const struct config_param *param,
+			GError **error_r)
+{
+	assert(param != NULL);
+
+	if (0 == strcmp(param->value, "any")) {
+		return server_socket_add_port(listen_socket, port, error_r);
+	} else if (param->value[0] == '/') {
+		return server_socket_add_path(listen_socket, param->value,
+					      error_r);
+	} else {
+		return server_socket_add_host(listen_socket, param->value,
+					      port, error_r);
+	}
+}
+
+static bool
+listen_systemd_activation(GError **error_r)
+{
+#ifdef ENABLE_SYSTEMD_DAEMON
+	int n = sd_listen_fds(true);
+	if (n <= 0) {
+		if (n < 0)
+			g_warning("sd_listen_fds() failed: %s",
+				  g_strerror(-n));
+		return false;
+	}
+
+	for (int i = SD_LISTEN_FDS_START, end = SD_LISTEN_FDS_START + n;
+	     i != end; ++i)
+		if (!server_socket_add_fd(listen_socket, i, error_r))
+			return false;
+
+	return true;
+#else
+	(void)error_r;
+	return false;
+#endif
+}
+
+bool
+listen_global_init(GError **error_r)
+{
+	int port = config_get_positive(CONF_PORT, DEFAULT_PORT);
+	const struct config_param *param =
+		config_get_next_param(CONF_BIND_TO_ADDRESS, NULL);
+	bool success;
+	GError *error = NULL;
+
+	listen_socket = server_socket_new(listen_callback, NULL);
+
+	if (listen_systemd_activation(&error))
+		return true;
+
+	if (error != NULL) {
+		g_propagate_error(error_r, error);
+		return false;
+	}
+
+	if (param != NULL) {
+		/* "bind_to_address" is configured, create listeners
+		   for all values */
+
+		do {
+			success = listen_add_config_param(port, param, &error);
+			if (!success) {
+				g_propagate_prefixed_error(error_r, error,
+							   "Failed to listen on %s (line %i): ",
+							   param->value, param->line);
+				return false;
+			}
+
+			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 = server_socket_add_port(listen_socket, port, error_r);
+		if (!success) {
+			g_propagate_prefixed_error(error_r, error,
+						   "Failed to listen on *:%d: ",
+						   port);
+			return false;
+		}
+	}
+
+	if (!server_socket_open(listen_socket, error_r))
+		return false;
+
+	listen_port = port;
+	return true;
+}
+
+void listen_global_finish(void)
+{
+	g_debug("listen_global_finish called");
+
+	assert(listen_socket != NULL);
+
+	server_socket_free(listen_socket);
+}