582 lines
22 KiB
C
582 lines
22 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* Jonathan Rose <jrose@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Call Parking Resource Internal API
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*
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* \author Jonathan Rose <jrose@digium.com>
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*/
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#ifndef ASTERISK_RES_PARKING_H
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#define ASTERISK_RES_PARKING_H
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#include "asterisk/pbx.h"
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#include "asterisk/bridge.h"
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#include "asterisk/parking.h"
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#include "asterisk/stasis_channels.h"
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#define DEFAULT_PARKING_LOT "default"
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#define DEFAULT_PARKING_EXTEN "700"
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#define BASE_REGISTRAR "res_parking"
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#define PARK_DIAL_CONTEXT "park-dial"
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#define PARKED_CALL_APPLICATION "ParkedCall"
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enum park_call_resolution {
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PARK_UNSET = 0, /*! Nothing set a resolution. This should never be observed in practice. */
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PARK_ABANDON, /*! The channel for the parked call hung up */
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PARK_TIMEOUT, /*! The parked call stayed parked until the parking lot timeout was reached and was removed */
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PARK_FORCED, /*! The parked call was forcibly terminated by an unusual means in Asterisk */
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PARK_ANSWERED, /*! The parked call was retrieved successfully */
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};
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enum parked_call_feature_options {
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OPT_PARKEDPLAY = 0,
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OPT_PARKEDTRANSFERS,
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OPT_PARKEDREPARKING,
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OPT_PARKEDHANGUP,
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OPT_PARKEDRECORDING,
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};
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enum parking_lot_modes {
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PARKINGLOT_NORMAL = 0, /*! The parking lot is configured normally and can accept new calls. Disable on reload if the config isn't replaced.
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* valid transitions: PARKINGLOT_DISABLED */
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PARKINGLOT_DYNAMIC, /*! The parking lot is a dynamically created parking lot. It can be parked to at any time. Disabled on last parked call leaving.
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* valid transitions: PARKINGLOT_DISABLED */
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PARKINGLOT_DISABLED, /*! The parking lot is no longer linked to a parking lot in configuration. It can no longer be parked to.
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* and it can not be parked to. This mode has no transitions. */
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};
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struct parking_lot_cfg {
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int parking_start; /*!< First space in the parking lot */
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int parking_stop; /*!< Last space in the parking lot */
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unsigned int parkingtime; /*!< Analogous to parkingtime config option */
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unsigned int comebackdialtime; /*!< Analogous to comebackdialtime config option */
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unsigned int parkfindnext; /*!< Analogous to parkfindnext config option */
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unsigned int parkext_exclusive; /*!< Analogous to parkext_exclusive config option */
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unsigned int parkaddhints; /*!< Analogous to parkaddhints config option */
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unsigned int comebacktoorigin; /*!< Analogous to comebacktoorigin config option */
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int parkedplay; /*!< Analogous to parkedplay config option */
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int parkedcalltransfers; /*!< Analogous to parkedcalltransfers config option */
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int parkedcallreparking; /*!< Analogous to parkedcallreparking config option */
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int parkedcallhangup; /*!< Analogous to parkedcallhangup config option */
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int parkedcallrecording; /*!< Analogous to parkedcallrecording config option */
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AST_DECLARE_STRING_FIELDS(
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AST_STRING_FIELD(name); /*!< Name of the parking lot configuration object */
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AST_STRING_FIELD(registrar); /*!< Which registrar the lot uses if it isn't the default registrar */
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AST_STRING_FIELD(mohclass); /*!< Analogous to mohclass config option */
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AST_STRING_FIELD(parkext); /*!< Analogous to parkext config option */
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AST_STRING_FIELD(parking_con); /*!< Analogous to context config option */
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AST_STRING_FIELD(comebackcontext); /*!< Analogous to comebackcontext config option */
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AST_STRING_FIELD(courtesytone); /*!< Analogous to courtesytone config option */
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);
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};
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struct parking_lot {
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int next_space; /*!< When using parkfindnext, which space we should start searching from next time we park */
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struct ast_bridge *parking_bridge; /*!< Bridged where parked calls will rest until they are answered or otherwise leave */
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struct ao2_container *parked_users; /*!< List of parked users rigidly ordered by their parking space */
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struct parking_lot_cfg *cfg; /*!< Reference to configuration object for the parking lot */
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enum parking_lot_modes mode; /*!< Whether a parking lot is operational, being reconfigured, primed for deletion, or dynamically created. */
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int disable_mark; /*!< On reload, disable this parking lot if it doesn't receive a new configuration. */
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AST_DECLARE_STRING_FIELDS(
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AST_STRING_FIELD(name); /*!< Name of the parking lot object */
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);
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};
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struct parked_user {
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struct ast_channel *chan; /*!< Parked channel */
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struct ast_channel_snapshot *retriever; /*!< Snapshot of the channel that retrieves a parked call */
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struct timeval start; /*!< When the call was parked */
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int parking_space; /*!< Which parking space is used */
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char comeback[AST_MAX_CONTEXT]; /*!< Where to go on parking timeout */
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char *parker_dial_string; /*!< dialstring to call back with comebacktoorigin. Used timeout extension generation and call control */
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unsigned int time_limit; /*!< How long this specific channel may remain in the parking lot before timing out */
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struct parking_lot *lot; /*!< Which parking lot the user is parked to */
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enum park_call_resolution resolution; /*!< How did the parking session end? If the call is in a bridge, lock parked_user before checking/setting */
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};
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#if defined(TEST_FRAMEWORK)
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/*!
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* \since 12.0.0
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* \brief Create an empty parking lot configuration structure
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* useful for unit tests.
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*
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* \param cat name given to the parking lot
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*
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* \retval NULL failure
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* \retval non-NULL successfully allocated parking lot
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*/
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struct parking_lot_cfg *parking_lot_cfg_create(const char *cat);
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#endif
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/*!
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* \since 12.0.0
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* \brief If a parking lot exists in the parking lot list already, update its status to match the provided
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* configuration and return a reference return a reference to it. Otherwise, create a parking lot
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* struct based on a parking lot configuration and return a reference to the new one.
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*
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* \param cfg The configuration being used as a reference to build the parking lot from.
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* \param dynamic non-zero if creating a dynamic parking lot with this. Don't replace existing parking lots. Ever.
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*
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* \retval A reference to the new parking lot
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* \retval NULL if it was not found and could not be allocated
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*
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* \note The parking lot will need to be unreffed if it ever falls out of scope
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* \note The parking lot will automatically be added to the parking lot container if needed as part of this process
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*/
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struct parking_lot *parking_lot_build_or_update(struct parking_lot_cfg *cfg, int dynamic);
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/*!
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* \since 12.0.0
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* \brief Remove a parking lot from the usable lists if it is no longer involved in any calls and no configuration currently claims it
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*
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* \param lot Which parking lot is being checked for elimination
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*
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* \retval 0 if the parking lot was removed
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* \retval -1 if the parking lot wasn't removed.
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*
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* \note This should generally be called when something is happening that could cause a parking lot to die such as a call being unparked or
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* a parking lot no longer existing in configurations.
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*/
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int parking_lot_remove_if_unused(struct parking_lot *lot);
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/*!
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* \since 12.0.0
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* \brief Create a new parking bridge
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*
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* \param bridge_lot Parking lot which the new bridge should be based on
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*
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* \retval NULL if the bridge can not be created
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* \retval Newly created parking bridge
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*/
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struct ast_bridge *bridge_parking_new(struct parking_lot *bridge_lot);
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/*!
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* \since 12.0.0
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* \brief Get a reference to a parking lot's bridge. If it doesn't exist, create it and get a reference.
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*
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* \param lot Which parking lot we need the bridge from. This parking lot must be locked before calling this function.
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*
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* \retval A reference to the ast_bridge associated with the parking lot
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* \retval NULL if it didn't already have a bridge and one couldn't be created
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*
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* \note This bridge will need to be unreffed if it ever falls out of scope.
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*/
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struct ast_bridge *parking_lot_get_bridge(struct parking_lot *lot);
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/*!
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* \since 12.0.0
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* \brief Get an available parking space within a parking lot.
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*
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* \param lot Which parking lot we are getting a space from
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* \param target_override If there is a specific slot we want, provide it here and we'll start from that position
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*
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* \retval -1 if No slot can be found
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* \retval integer value of parking space selected
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*
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* \note lot should be locked before this is called and unlocked only after a parked_user with the space
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* returned has been added to the parking lot.
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*/
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int parking_lot_get_space(struct parking_lot *lot, int target_override);
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/*!
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* \brief Determine if there is a parked user in a parking space and return it if there is.
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*
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* \param lot Parking lot being pulled from
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* \param target If < 0 search for the first occupied space in the parking lot
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* If >= 0 Only pull from the indicated target
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*
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* \retval NULL if no parked user could be pulled from the requested parking lot at the requested parking space
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* \retval reference to the requested parked user
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*
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*/
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struct parked_user *parking_lot_inspect_parked_user(struct parking_lot *lot, int target);
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/*!
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* \since 12.0.0
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* \brief Determine if there is a parked user in a parking space and pull it from the parking lot if there is.
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*
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* \param lot Parking lot being pulled from
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* \param target If < 0 search for the first occupied space in the parking lot
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* If >= 0 Only pull from the indicated target
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*
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* \retval NULL if no parked user could be pulled from the requested parking lot at the requested parking space
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* \retval reference to the requested parked user
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*
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* \note The parked user will be removed from parking lot as part of this process
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* \note Remove this reference with ao2_cleanup once it falls out of scope.
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*/
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struct parked_user *parking_lot_retrieve_parked_user(struct parking_lot *lot, int target);
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/*!
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* \since 12.0.0
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* \brief Apply features based on the parking lot feature options
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*
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* \param chan Which channel's feature set is being modified
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* \param lot parking lot which establishes the features used
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* \param recipient_mode AST_FEATURE_FLAG_BYCALLER if the user is the retriever
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* AST_FEATURE_FLAG_BYCALLEE if the user is the parkee
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*/
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void parked_call_retrieve_enable_features(struct ast_channel *chan, struct parking_lot *lot, int recipient_mode);
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/*!
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* \since 12.0.0
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* \brief Set necessary bridge roles on a channel that is about to enter a parking lot
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*
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* \param chan Entering channel
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* \param lot The parking lot the channel will be entering
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* \param force_ringing Use ringing instead of music on hold
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*
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* \retval 0 on success
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* \retval non-zero on failure
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*/
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int parking_channel_set_roles(struct ast_channel *chan, struct parking_lot *lot, int force_ringing);
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/*!
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* \since 12.0.0
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* \brief custom callback function for ast_bridge_channel_queue_playfile which plays a parking space
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* and optionally hangs up the call afterwards based on the payload in playfile.
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*/
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void say_parking_space(struct ast_bridge_channel *bridge_channel, const char *payload);
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/*!
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* \since 12.0.0
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* \brief Setup timeout interval feature on an ast_bridge_features for parking
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*
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* \param features The ast_bridge_features we are establishing the interval hook on
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* \param user The parked_user receiving the timeout duration limits
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*/
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void parking_set_duration(struct ast_bridge_features *features, struct parked_user *user);
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/*!
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* \since 12.0.0
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* \brief Get a pointer to the parking lot container for purposes such as iteration
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*
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* \retval pointer to the parking lot container.
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*/
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struct ao2_container *get_parking_lot_container(void);
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/*!
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* \since 12.0.0
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* \brief Find a parking lot based on its name
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*
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* \param lot_name Name of the parking lot sought
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*
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* \retval The parking lot if found
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* \retval NULL if no parking lot with the name specified exists
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*
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* \note ao2_cleanup this reference when you are done using it or you'll cause leaks.
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*/
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struct parking_lot *parking_lot_find_by_name(const char *lot_name);
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/*!
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* \since 12.0.0
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* \brief Create a dynamic parking lot
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*
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* \param name Dynamic parking lot name to create
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* \param chan Channel parkee to get dynamic parking lot parameters from
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*
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* \retval dynamically created parking lot on success
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* \retval NULL on error
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*
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* \note This should be called only after verifying that the named parking lot doesn't already exist in a non-dynamic way.
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*/
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struct parking_lot *parking_create_dynamic_lot(const char *name, struct ast_channel *chan);
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#if defined(TEST_FRAMEWORK)
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/*!
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* \since 12.0.0
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* \brief Create a dynamic parking lot without respect to whether they are enabled by configuration
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*
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* \param name Dynamic parking lot name to create
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* \param chan Channel parkee to get the dynamic parking lot parameters from
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*
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* \retval dynamically created parking lot on success
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* \retval NULL on error
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*
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* \note This should be called only after verifying that the named parking lot doesn't already exist in a non-dynamic way.
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*/
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struct parking_lot *parking_create_dynamic_lot_forced(const char *name, struct ast_channel *chan);
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#endif
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/*!
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* \since 12.0.0
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* \brief Find parking lot name from channel
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*
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* \param chan The channel we want the parking lot name for
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*
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* \return name of the parking lot to use for the channel.
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*
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* \note Always returns a parking lot name.
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*
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* \note Channel needs to be locked while the returned string is in use.
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*/
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const char *find_channel_parking_lot_name(struct ast_channel *chan);
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/*!
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* \since 12.0.0
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* \brief Flattens a dial string so that it can be written to/found from PBX extensions
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*
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* \param peername unflattened dial string. This will be flattened in place.
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*/
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void flatten_dial_string(char *dialstring);
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/*!
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* \since 12.0.0
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* \brief Set a channel's position in the PBX after timeout using the parking lot settings
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*
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* \param pu Parked user who is entering/reentering the PBX
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* \param lot Parking lot the user was removed from.
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*
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* \retval 0 Position set successfully
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* \retval -1 Failed to set the position
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*/
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int comeback_goto(struct parked_user *pu, struct parking_lot *lot);
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/*!
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* \since 12.0.0
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* \brief Add extensions for a parking lot configuration
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*
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* \param lot_cfg parking lot configuration to generate extensions for
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*
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* \retval 0 on success
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* \retval non-zero on failure
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*/
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int parking_lot_cfg_create_extensions(struct parking_lot_cfg *lot_cfg);
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/*!
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* \since 12.0.0
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* \brief Remove extensions belonging to a parking lot configuration
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*
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* \param lot_cfg parking lot configuratin to remove extensions from
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*
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* \note This will not remove extensions registered non-exclusively even
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* if those extensions were registered by lot_cfg. Those are only
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* purged on a res_parking module reload.
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*/
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void parking_lot_cfg_remove_extensions(struct parking_lot_cfg *lot_cfg);
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/*!
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* \since 12.0.0
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* \brief Pull a parked user out of its parking lot. Use this when you don't want to use the parked user afterwards.
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* \param user The parked user being pulled.
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*
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* \retval 0 on success
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* \retval -1 if the user didn't have its parking lot set
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*/
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int unpark_parked_user(struct parked_user *user);
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/*!
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* \since 12.0.0
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* \brief Publish a stasis parked call message for the channel indicating failure to park.
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*
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* \param parkee channel belonging to the failed parkee
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*/
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void publish_parked_call_failure(struct ast_channel *parkee);
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/*!
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* \since 12.0.0
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* \brief Publish a stasis parked call message for a given parked user
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*
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* \param pu pointer to a parked_user that we are generating the message for
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* \param event_type What parked call event type is provoking this message
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*/
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void publish_parked_call(struct parked_user *pu, enum ast_parked_call_event_type event_type);
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/*!
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* \since 12.3.0
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* \brief Create a parking announcement subscription
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*
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* \param chan Channel that will receive the announcement
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* \param parkee_uuid Unique ID of the channel being parked
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* \param hangup_after if non-zero, have the channel hangup after hearing the announcement
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*
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* \retval 0 on success
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* \retval -1 on failure
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*/
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int create_parked_subscription(struct ast_channel *chan, const char *parkee_uuid, int hangup_after);
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/*!
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* \since 12.0.0
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* \brief Setup a parked call on a parking bridge without needing to parse appdata
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*
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*/
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struct ast_bridge *park_common_setup(struct ast_channel *parkee, struct ast_channel *parker,
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const char *lot_name, const char *comeback_override,
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int use_ringing, int randomize, int time_limit, int silence_announcements);
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/*!
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* \since 12.0.0
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* \brief Function to prepare a channel for parking by determining which parking bridge should
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* be used, setting up a park common datastore so that the parking bridge will have access
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* to necessary parking information when joining, and applying various bridge roles to the
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* channel.
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*
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* \param parkee The channel being preparred for parking
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* \param parker The channel initiating the park; may be the parkee as well. May be NULL.
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* \param app_data arguments supplied to the Park application. May be NULL.
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* \param silence_announcements optional pointer to an integer where we want to store the silence option flag
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* this value should be initialized to 0 prior to calling park_common_setup.
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*
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* \retval reference to a parking bridge if successful
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* \retval NULL on failure
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*
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* \note ao2_cleanup this reference when you are done using it or you'll cause leaks.
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*/
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struct ast_bridge *park_application_setup(struct ast_channel *parkee, struct ast_channel *parker,
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const char *app_data, int *silence_announcements);
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struct park_common_datastore {
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char *parker_uuid; /*!< Unique ID of the channel parking the call. */
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char *parker_dial_string; /*!< Dial string that we would attempt to call when timing out when comebacktoorigin=yes */
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char *comeback_override; /*!< Optional goto string for where to send the call after we are done */
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int randomize; /*!< Pick a parking space to enter on at random */
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int time_limit; /*!< time limit override. -1 values don't override, 0 for unlimited time, >0 for custom time limit in seconds */
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int silence_announce; /*!< Used when a call parks itself to keep it from hearing the parked call announcement */
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};
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/*!
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* \since 12.0.0
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* \brief Get a copy of the park_common_datastore from a channel that is being parked
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*
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* \param parkee The channel entering parking with the datastore we are checking
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*
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* \retval Pointer to a copy of the park common datastore for parkee if it could be cloned. This needs to be free'd with park_common_datastore free.
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* \retval NULL if the park_common_datastore could not be copied off of the channel.
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|
*/
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|
struct park_common_datastore *get_park_common_datastore_copy(struct ast_channel *parkee);
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|
|
|
/*!
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|
* \since 12.0.0
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|
* \brief Free a park common datastore struct
|
|
*
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|
* \param datastore The park_common_datastore being free'd. (NULL tolerant)
|
|
*/
|
|
void park_common_datastore_free(struct park_common_datastore *datastore);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Notify metermaids that we've changed an extension
|
|
*
|
|
* \param exten Extension of the call parked/unparked
|
|
* \param context Context of the call parked/unparked
|
|
* \param state new device state
|
|
*/
|
|
void parking_notify_metermaids(int exten, const char *context, enum ast_device_state state);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Check global configuration to see if dynamic parking is enabled
|
|
*
|
|
* \retval 1 if dynamic parking is enabled
|
|
* \retval 0 if dynamic parking is disabled
|
|
*/
|
|
int parking_dynamic_lots_enabled(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Register parking applications
|
|
*
|
|
* \retval 0 if successful
|
|
* \retval -1 on failure
|
|
*/
|
|
int load_parking_applications(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Unregister parking applications
|
|
*/
|
|
void unload_parking_applications(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Register CLI commands
|
|
*
|
|
* \retval 0 if successful
|
|
* \retval -1 on failure
|
|
*/
|
|
int load_parking_ui(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Unregister CLI commands
|
|
*/
|
|
void unload_parking_ui(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Register manager actions and setup subscriptions for stasis events
|
|
*/
|
|
int load_parking_manager(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Unregister manager actions and remove subscriptions for stasis events
|
|
*/
|
|
void unload_parking_manager(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Register bridge features for parking
|
|
*
|
|
* \retval 0 on success
|
|
* \retval -1 on failure
|
|
*/
|
|
int load_parking_bridge_features(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Unregister features registered by load_parking_bridge_features
|
|
*/
|
|
void unload_parking_bridge_features(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Register Parking devstate handler
|
|
*/
|
|
int load_parking_devstate(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Unregister Parking devstate handler
|
|
*/
|
|
void unload_parking_devstate(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Register parking unit tests
|
|
*
|
|
* \retval 0 on success
|
|
* \retval nonzero on failure
|
|
*/
|
|
int load_parking_tests(void);
|
|
|
|
/*!
|
|
* \since 12.0.0
|
|
* \brief Unregister parking unit tests
|
|
*
|
|
* \return Nothing
|
|
*/
|
|
void unload_parking_tests(void);
|
|
|
|
#endif /* ASTERISK_RES_PARKING_H */
|