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/*
 * Purple - Internet Messaging Library
 * Copyright (C) Pidgin Developers <devel@pidgin.im>
 *
 * Purple is the legal property of its developers, whose names are too numerous
 * to list here. Please refer to the COPYRIGHT file distributed with this
 * source distribution.
 *
 * This library 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 library 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 library; if not, see <https://www.gnu.org/licenses/>.
 */

#if !defined(PURPLE_GLOBAL_HEADER_INSIDE) && !defined(PURPLE_COMPILATION)
# error "only <purple.h> may be included directly"
#endif

#ifndef PURPLE_NETWORK_H
#define PURPLE_NETWORK_H

#include <glib.h>
#include <gio/gio.h>

#include "purpleversion.h"

G_BEGIN_DECLS

/**************************************************************************/
/* Network API                                                            */
/**************************************************************************/

/**
 * purple_network_set_public_ip:
 * @ip: The local IP address.
 *
 * Sets the IP address of the local system in preferences.  This
 * is the IP address that should be used for incoming connections
 * (file transfer, direct IM, etc.) and should therefore be
 * publicly accessible.
 *
 * Since: 2.0
 */
PURPLE_AVAILABLE_IN_ALL
void purple_network_set_public_ip(const char *ip);

/**
 * purple_network_get_public_ip:
 *
 * Returns the IP address of the local system set in preferences.
 *
 * This returns the value set via purple_network_set_public_ip().
 *
 * Returns: The local IP address set in preferences.
 *
 * Since: 2.0
 */
PURPLE_AVAILABLE_IN_ALL
const char *purple_network_get_public_ip(void);

/**
 * purple_network_discover_my_ip:
 *
 * Discovers the IP address that should be used anywhere a public IP addresses
 * is needed (listening for an incoming file transfer, etc).
 *
 * If the user has manually specified an IP address via preferences, then this
 * is used.  Otherwise STUN, UPnP, and NAT-PMP will be attempted to discover
 * the local IP address depending on what's available.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
void purple_network_discover_my_ip(void);

/**
 * purple_network_get_my_ip_from_gio:
 * @sockconn: The socket connection to use to help figure out the IP, or %NULL.
 *
 * Returns the IP address that should be used anywhere a public IP address is
 * needed (listening for an incoming file transfer, etc).
 *
 * If the user has manually specified an IP address via preferences, then this
 * IP is returned.  Otherwise STUN, UPnP, NAT-PMP, and finally GIO will be
 * attempted to discover the local IP address depending on what's available.
 *
 * Returns: The local IP address to be used.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gchar *purple_network_get_my_ip_from_gio(GSocketConnection *sockconn);

/**
 * purple_network_is_available:
 *
 * Detects if there is an available network connection.
 *
 * Returns: TRUE if the network is available
 *
 * Since: 2.0
 */
PURPLE_AVAILABLE_IN_ALL
gboolean purple_network_is_available(void);

/**
 * purple_network_force_online:
 *
 * Makes purple_network_is_available() always return %TRUE.
 *
 * This is what backs the --force-online command line argument in Pidgin,
 * for example.  This is useful for offline testing, especially when
 * combined with nullprotocol.
 *
 * Since: 2.6
 */
PURPLE_AVAILABLE_IN_2_6
void purple_network_force_online(void);

/**
 * purple_network_set_stun_server:
 * @stun_server: The host name of the STUN server to set
 *
 * Update the STUN server IP given the host name
 * Will result in a DNS query being executed asynchronous
 *
 * Since: 2.6
 */
PURPLE_AVAILABLE_IN_2_6
void purple_network_set_stun_server(const gchar *stun_server);

/**
 * purple_network_get_stun_ip:
 *
 * Get the IP address of the STUN server as a string representation
 *
 * Returns: the IP address
 *
 * Since: 2.6
 */
PURPLE_AVAILABLE_IN_2_6
const gchar *purple_network_get_stun_ip(void);

/**
 * _purple_network_set_common_socket_flags:
 * @fd: The file descriptor for the socket.
 *
 * Sets most commonly used socket flags: O_NONBLOCK and FD_CLOEXEC.
 *
 * Returns: %TRUE if succeeded, %FALSE otherwise.
 *
 * Since: 3.0
 */
PURPLE_AVAILABLE_IN_3_0
gboolean _purple_network_set_common_socket_flags(int fd);

/**
 * purple_network_init:
 *
 * Initializes the network subsystem.
 *
 * Since: 2.0
 */
PURPLE_AVAILABLE_IN_ALL
void purple_network_init(void);

/**
 * purple_network_uninit:
 *
 * Shuts down the network subsystem.
 *
 * Since: 2.0
 */
PURPLE_AVAILABLE_IN_ALL
void purple_network_uninit(void);

G_END_DECLS

#endif /* PURPLE_NETWORK_H */