parking_bridge_features.c File Reference

Parking Bridge DTMF and Interval features. More...

#include "asterisk.h"
#include "res_parking.h"
#include "asterisk/utils.h"
#include "asterisk/astobj2.h"
#include "asterisk/logger.h"
#include "asterisk/pbx.h"
#include "asterisk/app.h"
#include "asterisk/bridge.h"
#include "asterisk/bridge_internal.h"
#include "asterisk/bridge_channel.h"
#include "asterisk/bridge_features.h"
#include "asterisk/conversions.h"
#include "asterisk/features.h"
#include "asterisk/say.h"
#include "asterisk/datastore.h"
#include "asterisk/stasis.h"
#include "asterisk/module.h"
#include "asterisk/core_local.h"
#include "asterisk/causes.h"

Include dependency graph for parking_bridge_features.c:

Go to the source code of this file.

Data Structures
struct	parked_subscription_data
struct	parked_subscription_datastore

Functions
int	create_parked_subscription (struct ast_channel *chan, const char *parkee_uuid, int hangup_after)
	Create a parking announcement subscription. More...
static int	create_parked_subscription_full (struct ast_channel *chan, const char *parkee_uuid, int hangup_after, struct transfer_channel_data *parked_channel_data)
static int	feature_park_call (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
static int	func_get_parkingslot_channel (struct ast_channel *chan, const char *function, char *data, char *buf, size_t len)
	Dial plan function to get the parking lot channel of an occupied parking lot. More...
int	load_parking_bridge_features (void)
	Register bridge features for parking. More...
static struct ast_channel *	park_local_transfer (struct ast_channel *parker, const char *context, const char *exten, struct transfer_channel_data *parked_channel_data)
static void	parked_subscription_datastore_destroy (void *data)
static void	parker_parked_call_message_response (struct ast_parked_call_payload *message, struct parked_subscription_data *data, struct stasis_subscription *sub)
static void	parker_update_cb (void *data, struct stasis_subscription *sub, struct stasis_message *message)
static int	parking_blind_transfer_park (struct ast_bridge_channel *bridge_channel, const char *context, const char *exten, transfer_channel_cb parked_channel_cb, struct transfer_channel_data *parked_channel_data)
static int	parking_duration_callback (struct ast_bridge_channel *bridge_channel, void *hook_pvt)
static int	parking_is_exten_park (const char *context, const char *exten)
static int	parking_park_bridge_channel (struct ast_bridge_channel *bridge_channel, const char *uuid_parkee, const char *uuid_parker, const char *app_data)
static int	parking_park_call (struct ast_bridge_channel *parker, char *exten, size_t length)
void	parking_set_duration (struct ast_bridge_features *features, struct parked_user *user)
	Setup timeout interval feature on an ast_bridge_features for parking. More...
static void	parking_timeout_set_caller_features (struct ast_channel *chan, struct parking_lot_cfg *cfg)
void	say_parking_space (struct ast_bridge_channel *bridge_channel, const char *payload)
	custom callback function for ast_bridge_channel_queue_playfile which plays a parking space and optionally hangs up the call afterwards based on the payload in playfile. More...
void	unload_parking_bridge_features (void)
	Unregister features registered by load_parking_bridge_features. More...
static void	wipe_subscription_datastore (struct ast_channel *chan)

Variables
static struct ast_custom_function	getparkingslotchannel_function
static const struct ast_datastore_info	parked_subscription_info
struct ast_parking_bridge_feature_fn_table	parking_provider

Detailed Description

Parking Bridge DTMF and Interval features.

Author

Jonathan Rose jrose.nosp@m.@dig.nosp@m.ium.c.nosp@m.om

Definition in file parking_bridge_features.c.

Function Documentation

create_parked_subscription()

int create_parked_subscription	(	struct ast_channel *	chan,
		const char *	parkee_uuid,
		int	hangup_after
	)

Create a parking announcement subscription.

Since

12.3.0

Parameters

chan	Channel that will receive the announcement
parkee_uuid	Unique ID of the channel being parked
hangup_after	if non-zero, have the channel hangup after hearing the announcement

Return values

0	on success
-1	on failure

Definition at line 236 of file parking_bridge_features.c.

{
    return create_parked_subscription_full(chan, parkee_uuid, hangup_after, NULL);
}

References create_parked_subscription_full(), parked_subscription_data::hangup_after, NULL, and parked_subscription_data::parkee_uuid.

Referenced by manager_park(), and manager_park_bridged().

create_parked_subscription_full()

static int create_parked_subscription_full ( struct ast_channel *  chan, const char *  parkee_uuid, int  hangup_after, struct transfer_channel_data *  parked_channel_data  )

static

Definition at line 177 of file parking_bridge_features.c.

{
    struct ast_datastore *datastore;
    struct parked_subscription_datastore *parked_datastore;
    struct parked_subscription_data *subscription_data;
 
    char *parker_uuid = ast_strdupa(ast_channel_uniqueid(chan));
    size_t parker_uuid_size;
    size_t parkee_uuid_size;
 
    /* If there is already a subscription, get rid of it. */
    wipe_subscription_datastore(chan);
 
    if (!(datastore = ast_datastore_alloc(&parked_subscription_info, NULL))) {
        return -1;
    }
 
    if (!(parked_datastore = ast_calloc(1, sizeof(*parked_datastore)))) {
        ast_datastore_free(datastore);
        return -1;
    }
 
    parker_uuid_size = strlen(parker_uuid) + 1;
    parkee_uuid_size = strlen(parkee_uuid) + 1;
 
    if (!(subscription_data = ast_calloc(1, sizeof(*subscription_data) + parker_uuid_size +
            parkee_uuid_size))) {
        ast_datastore_free(datastore);
        ast_free(parked_datastore);
        return -1;
    }
 
    if (parked_channel_data) {
        subscription_data->transfer_data = parked_channel_data;
        ao2_ref(parked_channel_data, +1);
    }
 
    subscription_data->hangup_after = hangup_after;
    subscription_data->parkee_uuid = subscription_data->parker_uuid + parker_uuid_size;
    ast_copy_string(subscription_data->parkee_uuid, parkee_uuid, parkee_uuid_size);
    ast_copy_string(subscription_data->parker_uuid, parker_uuid, parker_uuid_size);
 
    if (!(parked_datastore->parked_subscription = stasis_subscribe_pool(ast_parking_topic(), parker_update_cb, subscription_data))) {
        return -1;
    }
    stasis_subscription_accept_message_type(parked_datastore->parked_subscription, ast_parked_call_type());
    stasis_subscription_accept_message_type(parked_datastore->parked_subscription, stasis_subscription_change_type());
    stasis_subscription_set_filter(parked_datastore->parked_subscription, STASIS_SUBSCRIPTION_FILTER_SELECTIVE);
 
    datastore->data = parked_datastore;
 
    ast_channel_lock(chan);
    ast_channel_datastore_add(chan, datastore);
    ast_channel_unlock(chan);
 
    return 0;
}

References ao2_ref, ast_calloc, ast_channel_datastore_add(), ast_channel_lock, ast_channel_uniqueid(), ast_channel_unlock, ast_copy_string(), ast_datastore_alloc, ast_datastore_free(), ast_free, ast_parked_call_type(), ast_parking_topic(), ast_strdupa, ast_datastore::data, parked_subscription_data::hangup_after, NULL, parked_subscription_datastore::parked_subscription, parked_subscription_info, parked_subscription_data::parkee_uuid, parker_update_cb(), parked_subscription_data::parker_uuid, stasis_subscribe_pool, stasis_subscription_accept_message_type(), stasis_subscription_change_type(), STASIS_SUBSCRIPTION_FILTER_SELECTIVE, stasis_subscription_set_filter(), parked_subscription_data::transfer_data, and wipe_subscription_datastore().

Referenced by create_parked_subscription(), park_local_transfer(), and parking_blind_transfer_park().

feature_park_call()

static int feature_park_call ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Definition at line 527 of file parking_bridge_features.c.

{
    SCOPED_MODULE_USE(AST_MODULE_SELF);
 
    parking_park_call(bridge_channel, NULL, 0);
    return 0;
}

References ast_channel::bridge_channel, NULL, parking_park_call(), and SCOPED_MODULE_USE.

Referenced by load_parking_bridge_features().

func_get_parkingslot_channel()

static int func_get_parkingslot_channel ( struct ast_channel *  chan, const char *  function, char *  data, char *  buf, size_t  len  )

static

Dial plan function to get the parking lot channel of an occupied parking lot.

Definition at line 734 of file parking_bridge_features.c.

{
    RAII_VAR(struct parked_user *, pu, NULL, ao2_cleanup);
    RAII_VAR(struct parking_lot *, lot, NULL, ao2_cleanup);
    unsigned int space = 0;
    const char *content = NULL;
 
    AST_DECLARE_APP_ARGS(args,
        AST_APP_ARG(parking_space);
        AST_APP_ARG(parking_lot);
        AST_APP_ARG(other);
    );
 
    /* Parse the arguments. */
    AST_STANDARD_APP_ARGS(args, data);
 
    if (args.argc < 2) {
        /* Didn't receive enough arguments to do anything */
        ast_log(LOG_ERROR, "Usage: %s(<parking_space>,<parking_lot>)\n",
            function);
        return -1;
    }
 
    lot = parking_lot_find_by_name(args.parking_lot);
    if (!lot) {
        ast_log(LOG_ERROR, "Could not find parking lot: '%s'\n", args.parking_lot);
        return -1;
    }
 
    if (!ast_strlen_zero(args.parking_space)) {
        if (ast_str_to_uint(args.parking_space, &space) != 0) {
            ast_log(LOG_ERROR, "value '%s' for parking_space argument is invalid. Must be an integer greater than 0.\n",
                args.parking_space);
            return -1;
        }
    }
 
    pu = parking_lot_inspect_parked_user(lot, space);
    if (!pu) {
        return -1;
    }
 
    content = ast_channel_name(pu->chan);
    ast_copy_string(buf, content, len);
 
    return 0;
}

References ao2_cleanup, args, AST_APP_ARG, ast_channel_name(), ast_copy_string(), AST_DECLARE_APP_ARGS, ast_log, AST_STANDARD_APP_ARGS, ast_str_to_uint(), ast_strlen_zero(), buf, pbx_find_info::data, len(), LOG_ERROR, NULL, parking_lot_find_by_name(), parking_lot_inspect_parked_user(), and RAII_VAR.

load_parking_bridge_features()

int load_parking_bridge_features

(

void

)

Register bridge features for parking.

Since

12.0.0

Return values

0	on success
-1	on failure

Definition at line 803 of file parking_bridge_features.c.

{
    parking_provider.module = AST_MODULE_SELF;
 
    ast_custom_function_register(&getparkingslotchannel_function);
 
    if (ast_parking_register_bridge_features(&parking_provider)) {
        return -1;
    }
 
    if (ast_bridge_features_register(AST_BRIDGE_BUILTIN_PARKCALL, feature_park_call, NULL)) {
        return -1;
    }
 
    return 0;
}

References AST_BRIDGE_BUILTIN_PARKCALL, ast_bridge_features_register(), ast_custom_function_register, ast_parking_register_bridge_features(), feature_park_call(), getparkingslotchannel_function, ast_parking_bridge_feature_fn_table::module, NULL, and parking_provider.

Referenced by load_module().

park_local_transfer()

static struct ast_channel * park_local_transfer ( struct ast_channel *  parker, const char *  context, const char *  exten, struct transfer_channel_data *  parked_channel_data  )

static

Definition at line 247 of file parking_bridge_features.c.

{
    char destination[AST_MAX_EXTENSION + AST_MAX_CONTEXT + 1];
    struct ast_channel *parkee;
    struct ast_channel *parkee_side_2;
    int cause;
 
    /* Fill the variable with the extension and context we want to call */
    snprintf(destination, sizeof(destination), "%s@%s", exten, context);
 
    /* Now we request that chan_local prepare to call the destination */
    parkee = ast_request("Local", ast_channel_nativeformats(parker), NULL, parker, destination,
        &cause);
    if (!parkee) {
        return NULL;
    }
 
    /* Before we actually dial out let's inherit appropriate information. */
    ast_channel_lock_both(parker, parkee);
    ast_channel_req_accountcodes(parkee, parker, AST_CHANNEL_REQUESTOR_REPLACEMENT);
    ast_channel_parkinglot_set(parkee, ast_channel_parkinglot(parker));
    ast_connected_line_copy_from_caller(ast_channel_connected(parkee), ast_channel_caller(parker));
    ast_channel_inherit_variables(parker, parkee);
    ast_bridge_set_transfer_variables(parkee, ast_channel_name(parker), 0);
    ast_channel_datastore_inherit(parker, parkee);
    ast_channel_unlock(parker);
 
    parkee_side_2 = ast_local_get_peer(parkee);
    ast_assert(parkee_side_2 != NULL);
    ast_channel_unlock(parkee);
 
    /* We need to have the parker subscribe to the new local channel before hand. */
    if (create_parked_subscription_full(parker, ast_channel_uniqueid(parkee_side_2), 1, parked_channel_data)) {
        ast_channel_unref(parkee_side_2);
        ast_hangup(parkee);
        return NULL;
    }
 
    ast_channel_unref(parkee_side_2);
 
    /* Since the above worked fine now we actually call it and return the channel */
    if (ast_call(parkee, destination, 0)) {
        ast_hangup(parkee);
        return NULL;
    }
 
    return parkee;
}

References ast_assert, ast_bridge_set_transfer_variables(), ast_call(), ast_channel_caller(), ast_channel_connected(), ast_channel_datastore_inherit(), ast_channel_inherit_variables(), ast_channel_lock_both, ast_channel_name(), ast_channel_nativeformats(), ast_channel_parkinglot(), ast_channel_req_accountcodes(), AST_CHANNEL_REQUESTOR_REPLACEMENT, ast_channel_uniqueid(), ast_channel_unlock, ast_channel_unref, ast_connected_line_copy_from_caller(), ast_hangup(), ast_local_get_peer(), AST_MAX_CONTEXT, AST_MAX_EXTENSION, ast_request(), voicemailpwcheck::context, create_parked_subscription_full(), ast_channel::exten, and NULL.

Referenced by parking_blind_transfer_park().

parked_subscription_datastore_destroy()

static void parked_subscription_datastore_destroy ( void *  data )

static

Definition at line 79 of file parking_bridge_features.c.

{
    struct parked_subscription_datastore *subscription_datastore = data;
 
    stasis_unsubscribe(subscription_datastore->parked_subscription);
    subscription_datastore->parked_subscription = NULL;
 
    ast_free(subscription_datastore);
}

References ast_free, NULL, parked_subscription_datastore::parked_subscription, and stasis_unsubscribe().

parker_parked_call_message_response()

static void parker_parked_call_message_response ( struct ast_parked_call_payload *  message, struct parked_subscription_data *  data, struct stasis_subscription *  sub  )

static

Definition at line 108 of file parking_bridge_features.c.

{
    const char *parkee_to_act_on = data->parkee_uuid;
    char saynum_buf[16];
    struct ast_channel_snapshot *parkee_snapshot = message->parkee;
    RAII_VAR(struct ast_channel *, parker, NULL, ast_channel_cleanup);
    RAII_VAR(struct ast_bridge_channel *, bridge_channel, NULL, ao2_cleanup);
 
    if (strcmp(parkee_to_act_on, parkee_snapshot->base->uniqueid)) {
        return;
    }
 
    if (message->event_type != PARKED_CALL && message->event_type != PARKED_CALL_FAILED) {
        /* We only care about these two event types */
        return;
    }
 
    parker = ast_channel_get_by_name(data->parker_uuid);
    if (!parker) {
        return;
    }
 
    ast_channel_lock(parker);
    bridge_channel = ast_channel_get_bridge_channel(parker);
    ast_channel_unlock(parker);
    if (!bridge_channel) {
        return;
    }
 
    /* This subscription callback will block for the duration of the announcement if
     * parked_subscription_data is tracking a transfer_channel_data struct. */
    if (message->event_type == PARKED_CALL) {
        /* queue the saynum on the bridge channel and hangup */
        snprintf(saynum_buf, sizeof(saynum_buf), "%d %u", data->hangup_after, message->parkingspace);
        if (!data->transfer_data) {
            ast_bridge_channel_queue_playfile(bridge_channel, say_parking_space, saynum_buf, NULL);
        } else {
            ast_bridge_channel_queue_playfile_sync(bridge_channel, say_parking_space, saynum_buf, NULL);
            data->transfer_data->completed = 1;
        }
        wipe_subscription_datastore(parker);
    } else if (message->event_type == PARKED_CALL_FAILED) {
        if (!data->transfer_data) {
            ast_bridge_channel_queue_playfile(bridge_channel, NULL, "pbx-parkingfailed", NULL);
        } else {
            ast_bridge_channel_queue_playfile_sync(bridge_channel, NULL, "pbx-parkingfailed", NULL);
            data->transfer_data->completed = 1;
        }
        wipe_subscription_datastore(parker);
    }
}

References ao2_cleanup, ast_bridge_channel_queue_playfile(), ast_bridge_channel_queue_playfile_sync(), ast_channel_cleanup, ast_channel_get_bridge_channel(), ast_channel_get_by_name(), ast_channel_lock, ast_channel_unlock, ast_channel_snapshot::base, transfer_channel_data::completed, ast_datastore::data, parked_subscription_data::hangup_after, NULL, PARKED_CALL, PARKED_CALL_FAILED, parked_subscription_data::parker_uuid, RAII_VAR, say_parking_space(), parked_subscription_data::transfer_data, ast_channel_snapshot_base::uniqueid, and wipe_subscription_datastore().

Referenced by parker_update_cb().

parker_update_cb()

static void parker_update_cb ( void *  data, struct stasis_subscription *  sub, struct stasis_message *  message  )

static

Definition at line 161 of file parking_bridge_features.c.

{
    if (stasis_subscription_final_message(sub, message)) {
        struct parked_subscription_data *ps_data = data;
        ao2_cleanup(ps_data->transfer_data);
        ps_data->transfer_data = NULL;
        ast_free(data);
        return;
    }
 
    if (stasis_message_type(message) == ast_parked_call_type()) {
        struct ast_parked_call_payload *parked_call_message = stasis_message_data(message);
        parker_parked_call_message_response(parked_call_message, data, sub);
    }
}

References ao2_cleanup, ast_free, ast_parked_call_type(), NULL, parker_parked_call_message_response(), stasis_message_data(), stasis_message_type(), stasis_subscription_final_message(), sub, and parked_subscription_data::transfer_data.

Referenced by create_parked_subscription_full().

parking_blind_transfer_park()

static int parking_blind_transfer_park ( struct ast_bridge_channel *  bridge_channel, const char *  context, const char *  exten, transfer_channel_cb  parked_channel_cb, struct transfer_channel_data *  parked_channel_data  )

static

Definition at line 339 of file parking_bridge_features.c.

{
    RAII_VAR(struct ast_bridge_channel *, other, NULL, ao2_cleanup);
    RAII_VAR(struct ast_channel *, other_chan, NULL, ast_channel_cleanup);
 
    struct ast_exten *e;
    struct pbx_find_info find_info = { .stacklen = 0 };
    int peer_count;
 
    if (ast_strlen_zero(context) || ast_strlen_zero(exten)) {
        return -1;
    }
 
    if (!bridge_channel->in_bridge) {
        return -1;
    }
 
    if (!parking_is_exten_park(context, exten)) {
        return -1;
    }
 
    ast_bridge_channel_lock_bridge(bridge_channel);
    peer_count = bridge_channel->bridge->num_channels;
    if (peer_count == 2) {
        other = ast_bridge_channel_peer(bridge_channel);
        ao2_ref(other, +1);
        other_chan = other->chan;
        ast_channel_ref(other_chan);
    }
    ast_bridge_unlock(bridge_channel->bridge);
 
    if (peer_count < 2) {
        /* There is nothing to do if there is no one to park. */
        return -1;
    }
 
    /* With a multiparty bridge, we need to do a regular blind transfer. We link the
     * existing bridge to the parking lot with a Local channel rather than
     * transferring others. */
    if (peer_count > 2) {
        struct ast_channel *transfer_chan = NULL;
 
        transfer_chan = park_local_transfer(bridge_channel->chan, context, exten, parked_channel_data);
        if (!transfer_chan) {
            return -1;
        }
        ast_channel_ref(transfer_chan);
 
        if (parked_channel_cb) {
            parked_channel_cb(transfer_chan, parked_channel_data, AST_BRIDGE_TRANSFER_MULTI_PARTY);
        }
 
        if (ast_bridge_impart(bridge_channel->bridge, transfer_chan, NULL, NULL,
            AST_BRIDGE_IMPART_CHAN_INDEPENDENT)) {
            ast_hangup(transfer_chan);
            ast_channel_unref(transfer_chan);
            return -1;
        }
 
        ast_channel_unref(transfer_chan);
 
        return 0;
    }
 
    /* Subscribe to park messages with the other channel entering */
    if (create_parked_subscription_full(bridge_channel->chan, ast_channel_uniqueid(other->chan), 1, parked_channel_data)) {
        return -1;
    }
 
    if (parked_channel_cb) {
        parked_channel_cb(other_chan, parked_channel_data, AST_BRIDGE_TRANSFER_SINGLE_PARTY);
    }
 
    e = pbx_find_extension(NULL, NULL, &find_info, context, exten, 1, NULL, NULL, E_MATCH);
 
    /* Write the park frame with the intended recipient and other data out to the bridge. */
    ast_bridge_channel_write_park(bridge_channel,
        ast_channel_uniqueid(other_chan),
        ast_channel_uniqueid(bridge_channel->chan),
        e ? ast_get_extension_app_data(e) : NULL);
 
    return 0;
}

References ao2_cleanup, ao2_ref, ast_bridge_channel_lock_bridge(), ast_bridge_channel_peer(), ast_bridge_channel_write_park(), ast_bridge_impart(), AST_BRIDGE_IMPART_CHAN_INDEPENDENT, AST_BRIDGE_TRANSFER_MULTI_PARTY, AST_BRIDGE_TRANSFER_SINGLE_PARTY, ast_bridge_unlock, ast_channel_cleanup, ast_channel_ref, ast_channel_uniqueid(), ast_channel_unref, ast_get_extension_app_data(), ast_hangup(), ast_strlen_zero(), ast_bridge_channel::bridge, ast_channel::bridge_channel, ast_bridge_channel::chan, voicemailpwcheck::context, create_parked_subscription_full(), E_MATCH, ast_channel::exten, ast_bridge_channel::in_bridge, NULL, ast_bridge::num_channels, park_local_transfer(), parking_is_exten_park(), pbx_find_extension(), RAII_VAR, and pbx_find_info::stacklen.

Referenced by parking_park_call().

parking_duration_callback()

static int parking_duration_callback ( struct ast_bridge_channel *  bridge_channel, void *  hook_pvt  )

static

Definition at line 576 of file parking_bridge_features.c.

{
    struct parked_user *user = hook_pvt;
    struct ast_channel *chan = user->chan;
    struct ast_context *park_dial_context;
    const char *dial_string;
    char *dial_string_flat;
    char parking_space[AST_MAX_EXTENSION];
 
    char returnexten[AST_MAX_EXTENSION];
    char *duplicate_returnexten;
    struct ast_exten *existing_exten;
    struct pbx_find_info pbx_finder = { .stacklen = 0 }; /* The rest is reset in pbx_find_extension */
 
 
    /* We are still in the bridge, so it's possible for other stuff to mess with the parked call before we leave the bridge
       to deal with this, lock the parked user, check and set resolution. */
    ao2_lock(user);
    if (user->resolution != PARK_UNSET) {
        /* Abandon timeout since something else has resolved the parked user before we got to it. */
        ao2_unlock(user);
        return -1;
    }
    user->resolution = PARK_TIMEOUT;
    ao2_unlock(user);
 
    ast_bridge_channel_leave_bridge(bridge_channel, BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE,
        AST_CAUSE_NORMAL_CLEARING);
 
    dial_string = user->parker_dial_string;
    dial_string_flat = ast_strdupa(dial_string);
    flatten_dial_string(dial_string_flat);
 
    /* Set parking timeout channel variables */
    snprintf(parking_space, sizeof(parking_space), "%d", user->parking_space);
    ast_channel_lock(chan);
    ast_channel_stage_snapshot(chan);
    pbx_builtin_setvar_helper(chan, "PARKING_SPACE", parking_space);
    pbx_builtin_setvar_helper(chan, "PARKEDLOT", user->lot->name);
    pbx_builtin_setvar_helper(chan, "PARKER", dial_string);
    pbx_builtin_setvar_helper(chan, "PARKER_FLAT", dial_string_flat);
    parking_timeout_set_caller_features(chan, user->lot->cfg);
    ast_channel_stage_snapshot_done(chan);
    ast_channel_unlock(chan);
 
    /* Dialplan generation for park-dial extensions */
 
    if (ast_wrlock_contexts()) {
        ast_log(LOG_ERROR, "Failed to lock the contexts list. Can't add the park-dial extension.\n");
        return -1;
    }
 
    if (!(park_dial_context = ast_context_find_or_create(NULL, NULL, PARK_DIAL_CONTEXT, BASE_REGISTRAR))) {
        ast_log(LOG_ERROR, "Parking dial context '%s' does not exist and unable to create\n", PARK_DIAL_CONTEXT);
        if (ast_unlock_contexts()) {
            ast_assert(0);
        }
        goto abandon_extension_creation;
    }
 
    if (ast_wrlock_context(park_dial_context)) {
        ast_log(LOG_ERROR, "failed to obtain write lock on context '%s'\n", PARK_DIAL_CONTEXT);
        if (ast_unlock_contexts()) {
            ast_assert(0);
        }
        goto abandon_extension_creation;
    }
 
    if (ast_unlock_contexts()) {
        ast_assert(0);
    }
 
    snprintf(returnexten, sizeof(returnexten), "%s,%u", dial_string,
        user->lot->cfg->comebackdialtime);
 
    duplicate_returnexten = ast_strdup(returnexten);
    if (!duplicate_returnexten) {
        ast_log(LOG_ERROR, "Failed to create parking redial parker extension %s@%s - Dial(%s)\n",
            dial_string_flat, PARK_DIAL_CONTEXT, returnexten);
    }
 
    /* If an extension already exists here because we registered it for another parked call timing out, then we may overwrite it. */
    if ((existing_exten = pbx_find_extension(NULL, NULL, &pbx_finder, PARK_DIAL_CONTEXT, dial_string_flat, 1, NULL, NULL, E_MATCH)) &&
        (strcmp(ast_get_extension_registrar(existing_exten), BASE_REGISTRAR))) {
        ast_debug(3, "An extension for '%s@%s' was already registered by another registrar '%s'\n",
            dial_string_flat, PARK_DIAL_CONTEXT, ast_get_extension_registrar(existing_exten));
    } else if (ast_add_extension2_nolock(park_dial_context, 1, dial_string_flat, 1, NULL, NULL,
            "Dial", duplicate_returnexten, ast_free_ptr, BASE_REGISTRAR, NULL, 0)) {
        ast_log(LOG_ERROR, "Failed to create parking redial parker extension %s@%s - Dial(%s)\n",
            dial_string_flat, PARK_DIAL_CONTEXT, returnexten);
    }
 
    if (ast_unlock_context(park_dial_context)) {
        ast_assert(0);
    }
 
abandon_extension_creation:
 
    /* async_goto the proper PBX destination - this should happen when we come out of the bridge */
    if (!ast_strlen_zero(user->comeback)) {
        ast_async_parseable_goto(chan, user->comeback);
    } else {
        comeback_goto(user, user->lot);
    }
 
    return -1;
}

References ao2_lock, ao2_unlock, ast_add_extension2_nolock(), ast_assert, ast_async_parseable_goto(), ast_bridge_channel_leave_bridge(), AST_CAUSE_NORMAL_CLEARING, ast_channel_lock, ast_channel_stage_snapshot(), ast_channel_stage_snapshot_done(), ast_channel_unlock, ast_context_find_or_create(), ast_debug, ast_free_ptr(), ast_get_extension_registrar(), ast_log, AST_MAX_EXTENSION, ast_strdup, ast_strdupa, ast_strlen_zero(), ast_unlock_context(), ast_unlock_contexts(), ast_wrlock_context(), ast_wrlock_contexts(), BASE_REGISTRAR, BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE, comeback_goto(), E_MATCH, flatten_dial_string(), LOG_ERROR, NULL, PARK_DIAL_CONTEXT, PARK_TIMEOUT, PARK_UNSET, parking_timeout_set_caller_features(), pbx_builtin_setvar_helper(), pbx_find_extension(), and pbx_find_info::stacklen.

Referenced by parking_set_duration().

parking_is_exten_park()

static int parking_is_exten_park ( const char *  context, const char *  exten  )

static

Definition at line 300 of file parking_bridge_features.c.

{
    struct ast_exten *exten_obj;
    struct pbx_find_info info = { .stacklen = 0 }; /* the rest is reset in pbx_find_extension */
    const char *app_at_exten;
 
    ast_debug(4, "Checking if %s@%s is a parking exten\n", exten, context);
    exten_obj = pbx_find_extension(NULL, NULL, &info, context, exten, 1, NULL, NULL, E_MATCH);
    if (!exten_obj) {
        return 0;
    }
 
    app_at_exten = ast_get_extension_app(exten_obj);
    if (!app_at_exten || strcasecmp(PARK_APPLICATION, app_at_exten)) {
        return 0;
    }
 
    return 1;
}

References ast_debug, ast_get_extension_app(), voicemailpwcheck::context, E_MATCH, sip_to_pjsip::info(), NULL, PARK_APPLICATION, and pbx_find_extension().

Referenced by parking_blind_transfer_park().

parking_park_bridge_channel()

static int parking_park_bridge_channel ( struct ast_bridge_channel *  bridge_channel, const char *  uuid_parkee, const char *  uuid_parker, const char *  app_data  )

static

Definition at line 437 of file parking_bridge_features.c.

{
    RAII_VAR(struct ast_bridge *, parking_bridge, NULL, ao2_cleanup);
    RAII_VAR(struct ast_bridge *, original_bridge, NULL, ao2_cleanup);
    RAII_VAR(struct ast_channel *, parker, NULL, ao2_cleanup);
 
    if (strcmp(ast_channel_uniqueid(bridge_channel->chan), uuid_parkee)) {
        /* We aren't the parkee, so ignore this action. */
        return -1;
    }
 
    parker = ast_channel_get_by_name(uuid_parker);
 
    if (!parker) {
        ast_log(LOG_NOTICE, "Channel with uuid %s left before we could start parking the call. Parking canceled.\n", uuid_parker);
        publish_parked_call_failure(bridge_channel->chan);
        return -1;
    }
 
    if (!(parking_bridge = park_application_setup(bridge_channel->chan, parker, app_data, NULL))) {
        publish_parked_call_failure(bridge_channel->chan);
        return -1;
    }
 
    ast_bridge_set_transfer_variables(bridge_channel->chan, ast_channel_name(parker), 0);
 
    /* bridge_channel must be locked so we can get a reference to the bridge it is currently on */
    ao2_lock(bridge_channel);
 
    original_bridge = bridge_channel->bridge;
    if (!original_bridge) {
        ao2_unlock(bridge_channel);
        publish_parked_call_failure(bridge_channel->chan);
        return -1;
    }
 
    ao2_ref(original_bridge, +1); /* Cleaned by RAII_VAR */
 
    ao2_unlock(bridge_channel);
 
    if (ast_bridge_move(parking_bridge, original_bridge, bridge_channel->chan, NULL, 1)) {
        ast_log(LOG_ERROR, "Failed to move %s into the parking bridge.\n",
            ast_channel_name(bridge_channel->chan));
        return -1;
    }
 
    return 0;
}

References ao2_cleanup, ao2_lock, ao2_ref, ao2_unlock, ast_bridge_move(), ast_bridge_set_transfer_variables(), ast_channel_get_by_name(), ast_channel_name(), ast_channel_uniqueid(), ast_log, ast_bridge_channel::bridge, ast_channel::bridge_channel, ast_bridge_channel::chan, LOG_ERROR, LOG_NOTICE, NULL, park_application_setup(), publish_parked_call_failure(), and RAII_VAR.

parking_park_call()

static int parking_park_call ( struct ast_bridge_channel *  parker, char *  exten, size_t  length  )

static

Definition at line 502 of file parking_bridge_features.c.

{
    RAII_VAR(struct parking_lot *, lot, NULL, ao2_cleanup);
    const char *lot_name;
 
    ast_channel_lock(parker->chan);
    lot_name = ast_strdupa(find_channel_parking_lot_name(parker->chan));
    ast_channel_unlock(parker->chan);
 
    lot = parking_lot_find_by_name(lot_name);
    if (!lot) {
        lot = parking_create_dynamic_lot(lot_name, parker->chan);
    }
    if (!lot) {
        ast_log(AST_LOG_WARNING, "Cannot Park %s: lot %s unknown\n",
            ast_channel_name(parker->chan), lot_name);
        return -1;
    }
 
    if (exten) {
        ast_copy_string(exten, lot->cfg->parkext, length);
    }
    return parking_blind_transfer_park(parker, lot->cfg->parking_con, lot->cfg->parkext, NULL, NULL);
}

References ao2_cleanup, ast_channel_lock, ast_channel_name(), ast_channel_unlock, ast_copy_string(), ast_log, AST_LOG_WARNING, ast_strdupa, ast_bridge_channel::chan, ast_channel::exten, find_channel_parking_lot_name(), NULL, parking_blind_transfer_park(), parking_create_dynamic_lot(), parking_lot_find_by_name(), and RAII_VAR.

Referenced by feature_park_call().

parking_set_duration()

void parking_set_duration	(	struct ast_bridge_features *	features,
		struct parked_user *	user
	)

Setup timeout interval feature on an ast_bridge_features for parking.

Since

12.0.0

Parameters

features	The ast_bridge_features we are establishing the interval hook on
user	The parked_user receiving the timeout duration limits

Definition at line 706 of file parking_bridge_features.c.

{
    unsigned int time_limit;
 
    time_limit = user->time_limit * 1000;
 
    if (!time_limit) {
        /* There is no duration limit that we need to apply. */
        return;
    }
 
    /* If the time limit has already been passed, set a really low time limit so we can kick them out immediately. */
    time_limit = ast_remaining_ms(user->start, time_limit);
    if (time_limit <= 0) {
        time_limit = 1;
    }
 
    /* The interval hook is going to need a reference to the parked_user */
    ao2_ref(user, +1);
 
    if (ast_bridge_interval_hook(features, 0, time_limit,
        parking_duration_callback, user, __ao2_cleanup, AST_BRIDGE_HOOK_REMOVE_ON_PULL)) {
        ast_log(LOG_ERROR, "Failed to apply duration limit to the parked call.\n");
        ao2_ref(user, -1);
    }
}

References __ao2_cleanup(), ao2_ref, AST_BRIDGE_HOOK_REMOVE_ON_PULL, ast_bridge_interval_hook(), ast_log, ast_remaining_ms(), LOG_ERROR, and parking_duration_callback().

Referenced by bridge_parking_push().

parking_timeout_set_caller_features()

static void parking_timeout_set_caller_features ( struct ast_channel *  chan, struct parking_lot_cfg *  cfg  )

static

Definition at line 543 of file parking_bridge_features.c.

{
    char features[5];
    char *pos;
 
    /*
     * We are setting the callee Dial flag values because in the
     * timeout case, the caller is who is being called back.
     */
    pos = features;
    if (cfg->parkedcalltransfers & AST_FEATURE_FLAG_BYCALLER) {
        *pos++ = 't';
    }
    if (cfg->parkedcallreparking & AST_FEATURE_FLAG_BYCALLER) {
        *pos++ = 'k';
    }
    if (cfg->parkedcallhangup & AST_FEATURE_FLAG_BYCALLER) {
        *pos++ = 'h';
    }
    if (cfg->parkedcallrecording & AST_FEATURE_FLAG_BYCALLER) {
        *pos++ = 'x';
    }
    *pos = '\0';
 
    pbx_builtin_setvar_helper(chan, "BRIDGE_FEATURES", features);
}

References AST_FEATURE_FLAG_BYCALLER, parking_lot_cfg::parkedcallhangup, parking_lot_cfg::parkedcallrecording, parking_lot_cfg::parkedcallreparking, parking_lot_cfg::parkedcalltransfers, and pbx_builtin_setvar_helper().

Referenced by parking_duration_callback().

say_parking_space()

void say_parking_space	(	struct ast_bridge_channel *	bridge_channel,
		const char *	payload
	)

custom callback function for ast_bridge_channel_queue_playfile which plays a parking space and optionally hangs up the call afterwards based on the payload in playfile.

Since

12.0.0

Definition at line 684 of file parking_bridge_features.c.

{
    unsigned int numeric_value;
    unsigned int hangup_after;
 
    if (sscanf(payload, "%u %u", &hangup_after, &numeric_value) != 2) {
        /* If say_parking_space is called with a non-numeric string, we have a problem. */
        ast_assert(0);
        ast_bridge_channel_leave_bridge(bridge_channel,
            BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE, AST_CAUSE_NORMAL_CLEARING);
        return;
    }
 
    ast_say_digits(bridge_channel->chan, numeric_value, "",
        ast_channel_language(bridge_channel->chan));
 
    if (hangup_after) {
        ast_bridge_channel_leave_bridge(bridge_channel,
            BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE, AST_CAUSE_NORMAL_CLEARING);
    }
}

References ast_assert, ast_bridge_channel_leave_bridge(), AST_CAUSE_NORMAL_CLEARING, ast_channel_language(), ast_say_digits(), BRIDGE_CHANNEL_STATE_END_NO_DISSOLVE, and ast_bridge_channel::chan.

Referenced by bridge_parking_push(), and parker_parked_call_message_response().

unload_parking_bridge_features()

void unload_parking_bridge_features

(

void

)

Unregister features registered by load_parking_bridge_features.

Since

12.0.0

Definition at line 796 of file parking_bridge_features.c.

{
    ast_bridge_features_unregister(AST_BRIDGE_BUILTIN_PARKCALL);
    ast_parking_unregister_bridge_features(parking_provider.module_name);
    ast_custom_function_unregister(&getparkingslotchannel_function);
}

References AST_BRIDGE_BUILTIN_PARKCALL, ast_bridge_features_unregister(), ast_custom_function_unregister(), ast_parking_unregister_bridge_features(), getparkingslotchannel_function, ast_parking_bridge_feature_fn_table::module_name, and parking_provider.

Referenced by unload_module().

wipe_subscription_datastore()

static void wipe_subscription_datastore ( struct ast_channel *  chan )

static

Definition at line 94 of file parking_bridge_features.c.

{
    struct ast_datastore *datastore;
 
    ast_channel_lock(chan);
 
    datastore = ast_channel_datastore_find(chan, &parked_subscription_info, NULL);
    if (datastore) {
        ast_channel_datastore_remove(chan, datastore);
        ast_datastore_free(datastore);
    }
    ast_channel_unlock(chan);
}

References ast_channel_datastore_find(), ast_channel_datastore_remove(), ast_channel_lock, ast_channel_unlock, ast_datastore_free(), NULL, and parked_subscription_info.

Referenced by create_parked_subscription_full(), and parker_parked_call_message_response().

Variable Documentation

getparkingslotchannel_function

struct ast_custom_function getparkingslotchannel_function

static

Initial value:

= {
    .name = "PARK_GET_CHANNEL",
    .read = func_get_parkingslot_channel,
}

Definition at line 782 of file parking_bridge_features.c.

Referenced by load_parking_bridge_features(), and unload_parking_bridge_features().

parked_subscription_info

const struct ast_datastore_info parked_subscription_info

static

Initial value:

= {
    .type = "park subscription",
    .destroy = parked_subscription_datastore_destroy,
}

Definition at line 89 of file parking_bridge_features.c.

Referenced by create_parked_subscription_full(), and wipe_subscription_datastore().

parking_provider

struct ast_parking_bridge_feature_fn_table parking_provider

Definition at line 787 of file parking_bridge_features.c.

Referenced by ast_parking_blind_transfer_park(), ast_parking_is_exten_park(), ast_parking_park_bridge_channel(), ast_parking_park_call(), ast_parking_provider_registered(), ast_parking_register_bridge_features(), ast_parking_unregister_bridge_features(), load_parking_bridge_features(), and unload_parking_bridge_features().