bridge_basic.h File Reference

Basic bridge subclass API. More...

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Macros
#define	AST_TRANSFERER_ROLE_NAME   "transferer"

Functions
struct ast_bridge *	ast_bridge_basic_new (void)
	Create a new basic class bridge. More...
void	ast_bridge_basic_set_flags (struct ast_bridge *bridge, unsigned int flags)
	Set feature flags on a basic bridge. More...
int	ast_bridge_features_ds_append (struct ast_channel *chan, struct ast_flags *flags)
	Append basic bridge DTMF feature flags on the channel. More...
struct ast_flags *	ast_bridge_features_ds_get (struct ast_channel *chan)
	Get DTMF feature flags from the channel. More...
int	ast_bridge_features_ds_get_string (struct ast_channel *chan, char *buffer, size_t buf_size)
	writes a channel's DTMF features to a buffer string More...
int	ast_bridge_features_ds_set (struct ast_channel *chan, struct ast_flags *flags)
	Set basic bridge DTMF feature flags datastore on the channel. More...
int	ast_bridge_features_ds_set_string (struct ast_channel *chan, const char *features)
	Sets the features a channel will use upon being bridged. More...
void	ast_bridging_init_basic (void)

Variables
struct ast_bridge_methods	ast_bridge_basic_v_table
	Bridge basic class virtual method table. More...

Detailed Description

Basic bridge subclass API.

Author

Richard Mudgett rmudg.nosp@m.ett@.nosp@m.digiu.nosp@m.m.co.nosp@m.m

See Also:

• CREDITS

Definition in file bridge_basic.h.

Macro Definition Documentation

AST_TRANSFERER_ROLE_NAME

#define AST_TRANSFERER_ROLE_NAME   "transferer"

Definition at line 36 of file bridge_basic.h.

Function Documentation

ast_bridge_basic_new()

struct ast_bridge * ast_bridge_basic_new

(

void

)

Create a new basic class bridge.

Returns

a pointer to a new bridge on success

Return values

NULL	on failure

Example usage:

struct ast_bridge *bridge;
bridge = ast_bridge_basic_new();

This creates a basic two party bridge with any configured DTMF features enabled that will be destroyed once one of the channels hangs up.

Definition at line 3655 of file bridge_basic.c.

{
    struct ast_bridge *bridge;
 
    bridge = bridge_alloc(sizeof(struct ast_bridge), &ast_bridge_basic_v_table);
    bridge = bridge_base_init(bridge,
        AST_BRIDGE_CAPABILITY_NATIVE | AST_BRIDGE_CAPABILITY_1TO1MIX
            | AST_BRIDGE_CAPABILITY_MULTIMIX, NORMAL_FLAGS, NULL, NULL, NULL);
    bridge = bridge_basic_personality_alloc(bridge);
    bridge = bridge_register(bridge);
    return bridge;
}

References ast_bridge_basic_v_table, AST_BRIDGE_CAPABILITY_1TO1MIX, AST_BRIDGE_CAPABILITY_MULTIMIX, AST_BRIDGE_CAPABILITY_NATIVE, bridge_alloc(), bridge_base_init(), bridge_basic_personality_alloc(), bridge_register(), NORMAL_FLAGS, and NULL.

Referenced by action_bridge(), agent_request_exec(), ast_bridge_call_with_flags(), AST_TEST_DEFINE(), bridge_exec(), feature_attended_transfer(), and parked_call_app_exec().

ast_bridge_basic_set_flags()

void ast_bridge_basic_set_flags	(	struct ast_bridge *	bridge,
		unsigned int	flags
	)

Set feature flags on a basic bridge.

Using this function instead of setting flags directly will ensure that after operations such as an attended transfer, the bridge will maintain the flags that were set on it.

Parameters

bridge
flags	These are added to the flags already set.

Definition at line 3668 of file bridge_basic.c.

{
    SCOPED_LOCK(lock, bridge, ast_bridge_lock, ast_bridge_unlock);
    struct bridge_basic_personality *personality = bridge->personality;
 
    personality->details[personality->current].bridge_flags |= flags;
    ast_set_flag(&bridge->feature_flags, flags);
}

References ast_bridge_lock, ast_bridge_unlock, ast_set_flag, personality_details::bridge_flags, bridge_basic_personality::current, bridge_basic_personality::details, ast_bridge::feature_flags, lock, ast_bridge::personality, and SCOPED_LOCK.

Referenced by ast_bridge_call_with_flags().

ast_bridge_features_ds_append()

int ast_bridge_features_ds_append	(	struct ast_channel *	chan,
		struct ast_flags *	flags
	)

Append basic bridge DTMF feature flags on the channel.

Since

12.0.0

Parameters

chan	Channel to append DTMF features datastore.
flags	Builtin DTMF feature flags. (ast_bridge_config flags)

Note

The channel must be locked before calling this function.

This function differs from ast_bridge_features_ds_set only in that it won't remove features already set on the channel.

Return values

0	on success.
-1	on error.

Definition at line 263 of file bridge_basic.c.

{
    return bridge_features_ds_set_full(chan, flags, 0);
}

References bridge_features_ds_set_full(), and ast_flags::flags.

Referenced by pre_bridge_setup().

ast_bridge_features_ds_get()

struct ast_flags * ast_bridge_features_ds_get

(

struct ast_channel *

chan

)

Get DTMF feature flags from the channel.

Since

12.0.0

Parameters

chan	Channel to get DTMF features datastore.

Note

The channel should be locked before calling this function.

The channel must remain locked until the flags returned have been consumed.

Returns

flags on success.

Return values

NULL	if the datastore does not exist.

Definition at line 268 of file bridge_basic.c.

{
    struct ast_datastore *datastore;
 
    datastore = ast_channel_datastore_find(chan, &dtmf_features_info, NULL);
    if (!datastore) {
        return NULL;
    }
    return datastore->data;
}

References ast_channel_datastore_find(), ast_datastore::data, dtmf_features_info, and NULL.

Referenced by ast_bridge_features_ds_get_string(), attended_transfer_properties_alloc(), parked_call_retrieve_enable_features(), and setup_bridge_features_builtin().

ast_bridge_features_ds_get_string()

int ast_bridge_features_ds_get_string	(	struct ast_channel *	chan,
		char *	buffer,
		size_t	buf_size
	)

writes a channel's DTMF features to a buffer string

Since

12.0.0

Parameters

chan	channel whose feature flags should be checked
buffer	pointer string buffer where the output should be stored
buf_size	size of the provided buffer (ideally enough for all features, 6+)

Return values

0	on successful write
-1	on failure

Definition at line 208 of file bridge_basic.c.

{
    struct ast_flags *channel_flags;
    struct ast_flags held_copy;
 
    ast_channel_lock(chan);
    if (!(channel_flags = ast_bridge_features_ds_get(chan))) {
        ast_channel_unlock(chan);
        return -1;
    }
    held_copy = *channel_flags;
    ast_channel_unlock(chan);
 
    return dtmf_features_flags_to_string(&held_copy, buffer, buf_size);
}

References ast_bridge_features_ds_get(), ast_channel_lock, ast_channel_unlock, and dtmf_features_flags_to_string().

Referenced by func_channel_read().

ast_bridge_features_ds_set()

int ast_bridge_features_ds_set	(	struct ast_channel *	chan,
		struct ast_flags *	flags
	)

Set basic bridge DTMF feature flags datastore on the channel.

Since

12.0.0

Parameters

chan	Channel to set DTMF features datastore.
flags	Builtin DTMF feature flags. (ast_bridge_config flags)

Note

The channel must be locked before calling this function.

Return values

0	on success.
-1	on error.

Definition at line 258 of file bridge_basic.c.

{
    return bridge_features_ds_set_full(chan, flags, 1);
}

References bridge_features_ds_set_full(), and ast_flags::flags.

Referenced by ast_bridge_features_ds_set_string(), parked_call_retrieve_enable_features(), and recalling_exit().

ast_bridge_features_ds_set_string()

int ast_bridge_features_ds_set_string	(	struct ast_channel *	chan,
		const char *	features
	)

Sets the features a channel will use upon being bridged.

Since

12.0.0

Parameters

chan	Which channel to set features for
features	Which feature codes to set for the channel

Return values

0	on success
-1	on failure

Definition at line 189 of file bridge_basic.c.

{
    struct ast_flags flags = {0};
 
    if (build_dtmf_features(&flags, features)) {
        return -1;
    }
 
    ast_channel_lock(chan);
    if (ast_bridge_features_ds_set(chan, &flags)) {
        ast_channel_unlock(chan);
        ast_log(LOG_ERROR, "Failed to apply features datastore for '%s' to channel '%s'\n", features, ast_channel_name(chan));
        return -1;
    }
    ast_channel_unlock(chan);
 
    return 0;
}

References ast_bridge_features_ds_set(), ast_channel_lock, ast_channel_name(), ast_channel_unlock, ast_log, build_dtmf_features(), ast_flags::flags, and LOG_ERROR.

Referenced by func_channel_write_real().

ast_bridging_init_basic()

void ast_bridging_init_basic

(

void

)

Initialize the basic bridge class for use by the system.

Definition at line 3677 of file bridge_basic.c.

{
    /* Setup bridge basic subclass v_table. */
    ast_bridge_basic_v_table = ast_bridge_base_v_table;
    ast_bridge_basic_v_table.name = "basic";
    ast_bridge_basic_v_table.push = bridge_basic_push;
    ast_bridge_basic_v_table.pull = bridge_basic_pull;
    ast_bridge_basic_v_table.destroy = bridge_basic_destroy;
 
    /*
     * Personality vtables don't have the same rules as
     * normal bridge vtables.  These vtable functions are
     * used as alterations to the ast_bridge_basic_v_table
     * method functionality and are checked for NULL before
     * calling.
     */
    personality_normal_v_table.name = "normal";
    personality_normal_v_table.push = bridge_personality_normal_push;
 
    personality_atxfer_v_table.name = "attended transfer";
    personality_atxfer_v_table.push = bridge_personality_atxfer_push;
    personality_atxfer_v_table.pull = bridge_personality_atxfer_pull;
 
    ast_bridge_features_register(AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER, feature_attended_transfer, NULL);
    ast_bridge_features_register(AST_BRIDGE_BUILTIN_BLINDTRANSFER, feature_blind_transfer, NULL);
}

References ast_bridge_base_v_table, ast_bridge_basic_v_table, AST_BRIDGE_BUILTIN_ATTENDEDTRANSFER, AST_BRIDGE_BUILTIN_BLINDTRANSFER, ast_bridge_features_register(), bridge_basic_destroy(), bridge_basic_pull(), bridge_basic_push(), bridge_personality_atxfer_pull(), bridge_personality_atxfer_push(), bridge_personality_normal_push(), ast_bridge_methods::destroy, feature_attended_transfer(), feature_blind_transfer(), ast_bridge_methods::name, NULL, personality_atxfer_v_table, personality_normal_v_table, ast_bridge_methods::pull, and ast_bridge_methods::push.

Referenced by ast_bridging_init().

Variable Documentation

ast_bridge_basic_v_table

struct ast_bridge_methods ast_bridge_basic_v_table

extern

Bridge basic class virtual method table.

Definition at line 3564 of file bridge_basic.c.

Referenced by ast_bridge_basic_new(), and ast_bridging_init_basic().