src/proxy.h

/**
 * @file proxy.h Proxy API
 * @ingroup core
 *
 * gaim
 *
 * Gaim 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 _GAIM_PROXY_H_
#define _GAIM_PROXY_H_

#include <glib.h>
#include "eventloop.h"

/**
 * A type of proxy connection.
 */
typedef enum
{
	GAIM_PROXY_USE_GLOBAL = -1,  /**< Use the global proxy information. */
	GAIM_PROXY_NONE = 0,         /**< No proxy.                         */
	GAIM_PROXY_HTTP,             /**< HTTP proxy.                       */
	GAIM_PROXY_SOCKS4,           /**< SOCKS 4 proxy.                    */
	GAIM_PROXY_SOCKS5,           /**< SOCKS 5 proxy.                    */
	GAIM_PROXY_USE_ENVVAR        /**< Use environmental settings.       */

} GaimProxyType;

/**
 * Information on proxy settings.
 */
typedef struct
{
	GaimProxyType type;   /**< The proxy type.  */

	char *host;           /**< The host.        */
	int   port;           /**< The port number. */
	char *username;       /**< The username.    */
	char *password;       /**< The password.    */

} GaimProxyInfo;

typedef struct PBH GaimProxyConnectInfo;

typedef void (*GaimProxyConnectFunction)(gpointer data, gint source);
typedef void (*GaimProxyErrorFunction)(gpointer dat, const gchar *error_message);

/**
 * The "hosts" parameter is a linked list containing pairs of
 * one size_t addrlen and one struct sockaddr *addr.
 */
typedef void (*GaimProxyDnsConnectFunction)(GSList *hosts, gpointer data, const char *error_message);


#include "account.h"

#ifdef __cplusplus
extern "C" {
#endif

/**************************************************************************/
/** @name Proxy structure API                                             */
/**************************************************************************/
/*@{*/

/**
 * Creates a proxy information structure.
 *
 * @return The proxy information structure.
 */
GaimProxyInfo *gaim_proxy_info_new(void);

/**
 * Destroys a proxy information structure.
 *
 * @param info The proxy information structure to destroy.
 */
void gaim_proxy_info_destroy(GaimProxyInfo *info);

/**
 * Sets the type of proxy.
 *
 * @param info The proxy information.
 * @param type The proxy type.
 */
void gaim_proxy_info_set_type(GaimProxyInfo *info, GaimProxyType type);

/**
 * Sets the proxy host.
 *
 * @param info The proxy information.
 * @param host The host.
 */
void gaim_proxy_info_set_host(GaimProxyInfo *info, const char *host);

/**
 * Sets the proxy port.
 *
 * @param info The proxy information.
 * @param port The port.
 */
void gaim_proxy_info_set_port(GaimProxyInfo *info, int port);

/**
 * Sets the proxy username.
 *
 * @param info     The proxy information.
 * @param username The username.
 */
void gaim_proxy_info_set_username(GaimProxyInfo *info, const char *username);

/**
 * Sets the proxy password.
 *
 * @param info     The proxy information.
 * @param password The password.
 */
void gaim_proxy_info_set_password(GaimProxyInfo *info, const char *password);

/**
 * Returns the proxy's type.
 *
 * @param info The proxy information.
 *
 * @return The type.
 */
GaimProxyType gaim_proxy_info_get_type(const GaimProxyInfo *info);

/**
 * Returns the proxy's host.
 *
 * @param info The proxy information.
 *
 * @return The host.
 */
const char *gaim_proxy_info_get_host(const GaimProxyInfo *info);

/**
 * Returns the proxy's port.
 *
 * @param info The proxy information.
 *
 * @return The port.
 */
int gaim_proxy_info_get_port(const GaimProxyInfo *info);

/**
 * Returns the proxy's username.
 *
 * @param info The proxy information.
 *
 * @return The username.
 */
const char *gaim_proxy_info_get_username(const GaimProxyInfo *info);

/**
 * Returns the proxy's password.
 *
 * @param info The proxy information.
 *
 * @return The password.
 */
const char *gaim_proxy_info_get_password(const GaimProxyInfo *info);

/*@}*/

/**************************************************************************/
/** @name Global Proxy API                                                */
/**************************************************************************/
/*@{*/

/**
 * Returns gaim's global proxy information.
 *
 * @return The global proxy information.
 */
GaimProxyInfo *gaim_global_proxy_get_info(void);

/*@}*/

/**************************************************************************/
/** @name Proxy API                                                       */
/**************************************************************************/
/*@{*/

/**
 * Returns the proxy subsystem handle.
 *
 * @return The proxy subsystem handle.
 */
void *gaim_proxy_get_handle(void);

/**
 * Initializes the proxy subsystem.
 */
void gaim_proxy_init(void);

/**
 * Uninitializes the proxy subsystem.
 */
void gaim_proxy_uninit(void);

/**
 * Returns configuration of a proxy.
 *
 * @param account The account for which the configuration is needed.
 *
 * @return The configuration of a proxy.
 */
GaimProxyInfo *gaim_proxy_get_setup(GaimAccount *account);

/**
 * Makes a connection to the specified host and port.  Note that this
 * function name can be misleading--although it is called "proxy
 * connect," it is used for establishing any outgoing TCP connection,
 * whether through a proxy or not.
 *
 * @param account    The account making the connection.
 * @param host       The destination host.
 * @param port       The destination port.
 * @param connect_cb The function to call when the connection is
 *                   established.
 * @param error_cb   The function to call if there is an error while
 *                   establishing the connection.
 * @param data       User-defined data.
 *
 * @return NULL if there was an error, or a reference to a data
 *         structure that can be used to cancel the pending
 *         connection, if needed.
 */
GaimProxyConnectInfo *gaim_proxy_connect(GaimAccount *account,
			const char *host, int port,
			GaimProxyConnectFunction connect_cb,
			GaimProxyErrorFunction error_cb, gpointer data);

/**
 * Makes a connection through a SOCKS5 proxy.
 *
 * @param gpi        The GaimProxyInfo specifying the proxy settings
 * @param host       The destination host.
 * @param port       The destination port.
 * @param connect_cb The function to call when the connection is
 *                   established.
 * @param error_cb   The function to call if there is an error while
 *                   establishing the connection.
 * @param data       User-defined data.
 *
 * @return NULL if there was an error, or a reference to a data
 *         structure that can be used to cancel the pending
 *         connection, if needed.
 */
GaimProxyConnectInfo *gaim_proxy_connect_socks5(GaimProxyInfo *gpi,
			const char *host, int port,
			GaimProxyConnectFunction connect_cb,
			GaimProxyErrorFunction error_cb, gpointer data);

/**
 * Do an async dns query
 *
 * @param hostname The hostname to resolve
 * @param port A portnumber which is stored in the struct sockaddr
 * @param callback Callback to call after resolving
 * @param data Extra data for the callback function
 *
 * @return Zero indicates the connection is pending. Any other value indicates failure.
 */
int gaim_gethostbyname_async(const char *hostname, int port, GaimProxyDnsConnectFunction callback, gpointer data);

/*@}*/

#ifdef __cplusplus
}
#endif

#endif /* _GAIM_PROXY_H_ */