home *** CD-ROM | disk | FTP | other *** search
- /**
- * @file network.h Network API
- * @ingroup core
- *
- * purple
- *
- * 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #ifndef _PURPLE_NETWORK_H_
- #define _PURPLE_NETWORK_H_
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /**************************************************************************/
- /** @name Network API */
- /**************************************************************************/
- /*@{*/
-
- typedef struct _PurpleNetworkListenData PurpleNetworkListenData;
-
- typedef void (*PurpleNetworkListenCallback) (int listenfd, gpointer data);
-
- /**
- * Converts a dot-decimal IP address to an array of unsigned
- * chars. For example, converts 192.168.0.1 to a 4 byte
- * array containing 192, 168, 0 and 1.
- *
- * @param ip An IP address in dot-decimal notiation.
- * @return An array of 4 bytes containing an IP addresses
- * equivalent to the given parameter, or NULL if
- * the given IP address is invalid. This value
- * is statically allocated and should not be
- * freed.
- */
- const unsigned char *purple_network_ip_atoi(const char *ip);
-
- /**
- * 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.
- *
- * @param ip The local IP address.
- */
- void purple_network_set_public_ip(const char *ip);
-
- /**
- * Returns the IP address of the local system set in preferences.
- *
- * This returns the value set via purple_network_set_public_ip().
- * You probably want to use purple_network_get_my_ip() instead.
- *
- * @return The local IP address set in preferences.
- */
- const char *purple_network_get_public_ip(void);
-
- /**
- * Returns the IP address of the local system.
- *
- * You probably want to use purple_network_get_my_ip() instead.
- *
- * @note The returned string is a pointer to a static buffer. If this
- * function is called twice, it may be important to make a copy
- * of the returned string.
- *
- * @param fd The fd to use to help figure out the IP, or else -1.
- * @return The local IP address.
- */
- const char *purple_network_get_local_system_ip(int fd);
-
- /**
- * Returns 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 IP is returned. Otherwise the
- * IP address returned by purple_network_get_local_system_ip()
- * is returned.
- *
- * @note The returned string is a pointer to a static buffer. If this
- * function is called twice, it may be important to make a copy
- * of the returned string.
- *
- * @param fd The fd to use to help figure out the IP, or -1.
- * @return The local IP address to be used.
- */
- const char *purple_network_get_my_ip(int fd);
-
- /**
- * Attempts to open a listening port ONLY on the specified port number.
- * You probably want to use purple_network_listen_range() instead of this.
- * This function is useful, for example, if you wanted to write a telnet
- * server as a Purple plugin, and you HAD to listen on port 23. Why anyone
- * would want to do that is beyond me.
- *
- * This opens a listening port. The caller will want to set up a watcher
- * of type PURPLE_INPUT_READ on the fd returned in cb. It will probably call
- * accept in the watcher callback, and then possibly remove the watcher and close
- * the listening socket, and add a new watcher on the new socket accept
- * returned.
- *
- * @param port The port number to bind to. Must be greater than 0.
- * @param socket_type The type of socket to open for listening.
- * This will be either SOCK_STREAM for TCP or SOCK_DGRAM for UDP.
- * @param cb The callback to be invoked when the port to listen on is available.
- * The file descriptor of the listening socket will be specified in
- * this callback, or -1 if no socket could be established.
- * @param cb_data extra data to be returned when cb is called
- *
- * @return A pointer to a data structure that can be used to cancel
- * the pending listener, or NULL if unable to obtain a local
- * socket to listen on.
- */
- PurpleNetworkListenData *purple_network_listen(unsigned short port,
- int socket_type, PurpleNetworkListenCallback cb, gpointer cb_data);
-
- /**
- * Opens a listening port selected from a range of ports. The range of
- * ports used is chosen in the following manner:
- * If a range is specified in preferences, these values are used.
- * If a non-0 values are passed to the function as parameters, these
- * values are used.
- * Otherwise a port is chosen at random by the operating system.
- *
- * This opens a listening port. The caller will want to set up a watcher
- * of type PURPLE_INPUT_READ on the fd returned in cb. It will probably call
- * accept in the watcher callback, and then possibly remove the watcher and close
- * the listening socket, and add a new watcher on the new socket accept
- * returned.
- *
- * @param start The port number to bind to, or 0 to pick a random port.
- * Users are allowed to override this arg in prefs.
- * @param end The highest possible port in the range of ports to listen on,
- * or 0 to pick a random port. Users are allowed to override this
- * arg in prefs.
- * @param socket_type The type of socket to open for listening.
- * This will be either SOCK_STREAM for TCP or SOCK_DGRAM for UDP.
- * @param cb The callback to be invoked when the port to listen on is available.
- * The file descriptor of the listening socket will be specified in
- * this callback, or -1 if no socket could be established.
- * @param cb_data extra data to be returned when cb is called
- *
- * @return A pointer to a data structure that can be used to cancel
- * the pending listener, or NULL if unable to obtain a local
- * socket to listen on.
- */
- PurpleNetworkListenData *purple_network_listen_range(unsigned short start,
- unsigned short end, int socket_type,
- PurpleNetworkListenCallback cb, gpointer cb_data);
-
- /**
- * This can be used to cancel any in-progress listener connection
- * by passing in the return value from either purple_network_listen()
- * or purple_network_listen_range().
- *
- * @param listen_data This listener attempt will be canceled and
- * the struct will be freed.
- */
- void purple_network_listen_cancel(PurpleNetworkListenData *listen_data);
-
- /**
- * Gets a port number from a file descriptor.
- *
- * @param fd The file descriptor. This should be a tcp socket. The current
- * implementation probably dies on anything but IPv4. Perhaps this
- * possible bug will inspire new and valuable contributors to Purple.
- * @return The port number, in host byte order.
- */
- unsigned short purple_network_get_port_from_fd(int fd);
-
- /**
- * Detects if there is an available Internet connection. Note that this call
- * could block for the amount of time specified in inet_detect_timeout, so
- * using it in a UI thread may cause uncomfortableness
- *
- * @return TRUE if the Internet is available
- */
- gboolean purple_network_is_available(void);
-
- /**
- * Get the handle for the network system
- *
- * @return the handle to the network system
- */
- void *purple_network_get_handle(void);
-
- /**
- * Initializes the network subsystem.
- */
- void purple_network_init(void);
-
- /**
- * Shuts down the network subsystem.
- */
- void purple_network_uninit(void);
-
- /*@}*/
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* _PURPLE_NETWORK_H_ */
-