core_local.h File Reference

Local proxy channel special access. More...

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Functions
struct stasis_message_type *	ast_local_bridge_type (void)
	Message type for when two local channel halves are bridged together. More...
struct ast_channel *	ast_local_get_peer (struct ast_channel *ast)
	Get the other local channel in the pair. More...
void	ast_local_lock_all (struct ast_channel *chan, void **tech_pvt, struct ast_channel **base_chan, struct ast_channel **base_owner)
	Add a reference to the local channel's private tech, lock the local channel's private base, and add references and lock both sides of the local channel. More...
struct stasis_message_type *	ast_local_optimization_begin_type (void)
	Message type for when a local channel optimization begins. More...
struct stasis_message_type *	ast_local_optimization_end_type (void)
	Message type for when a local channel optimization completes. More...
int	ast_local_setup_bridge (struct ast_channel *ast, struct ast_bridge *bridge, struct ast_channel *swap, struct ast_bridge_features *features)
	Setup the outgoing local channel to join a bridge on ast_call(). More...
int	ast_local_setup_masquerade (struct ast_channel *ast, struct ast_channel *masq)
	Setup the outgoing local channel to masquerade into a channel on ast_call(). More...
void	ast_local_unlock_all (void *tech_pvt, struct ast_channel *base_chan, struct ast_channel *base_owner)
	Remove a reference to the given local channel's private tech, unlock the given local channel's private base, and remove references and unlock both sides of given the local channel. More...

Detailed Description

Local proxy channel special access.

Author

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

See Also:

• CREDITS

Definition in file core_local.h.

Function Documentation

ast_local_bridge_type()

struct stasis_message_type * ast_local_bridge_type

(

void

)

Message type for when two local channel halves are bridged together.

Since

12.0.0

Note

Payloads for the ast_local_bridge_type are a ast_multi_channel_blob. Roles for the channels in the ast_multi_channel_blob are "1" and "2", reflecting the two halves. Unlike most other bridges, the 'bridge' between two local channels is not part of the bridge framework; as such, the message simply references the two local channel halves that are now bridged.

Return values

A	Stasis Message Bus API message type

Referenced by ast_local_init(), local_message_to_ami(), local_shutdown(), and publish_local_bridge_message().

ast_local_get_peer()

struct ast_channel * ast_local_get_peer

(

struct ast_channel *

ast

)

Get the other local channel in the pair.

Since

12.0.0

Parameters

ast	Local channel to get peer.

Note

On entry, ast must be locked.

Return values

peer	reffed on success.
NULL	if no peer or error.

Definition at line 276 of file core_local.c.

{
    struct local_pvt *p = ast_channel_tech_pvt(ast);
    struct local_pvt *found;
    struct ast_channel *peer;
 
    if (!p) {
        return NULL;
    }
 
    found = p ? ao2_find(locals, p, 0) : NULL;
    if (!found) {
        /* ast is either not a local channel or it has alredy been hungup */
        return NULL;
    }
    ao2_lock(found);
    if (ast == p->base.owner) {
        peer = p->base.chan;
    } else if (ast == p->base.chan) {
        peer = p->base.owner;
    } else {
        peer = NULL;
    }
    if (peer) {
        ast_channel_ref(peer);
    }
    ao2_unlock(found);
    ao2_ref(found, -1);
    return peer;
}

References ao2_find, ao2_lock, ao2_ref, ao2_unlock, ast_channel_ref, ast_channel_tech_pvt(), local_pvt::base, ast_unreal_pvt::chan, locals, NULL, and ast_unreal_pvt::owner.

Referenced by ari_channels_handle_originate_with_id(), bridge_channel_internal_join(), and park_local_transfer().

ast_local_lock_all()

void ast_local_lock_all	(	struct ast_channel *	chan,
		void **	tech_pvt,
		struct ast_channel **	base_chan,
		struct ast_channel **	base_owner
	)

Add a reference to the local channel's private tech, lock the local channel's private base, and add references and lock both sides of the local channel.

Note

None of these locks should be held prior to calling this function.

To undo this process call ast_local_unlock_all2.

Since

13.17.0, 14.6.0

Parameters

	chan	Must be a local channel
[out]	tech_pvt	channel's private tech (ref and lock added)
[out]	base_chan	One side of the local channel (ref and lock added)
[out]	base_owner	Other side of the local channel (ref and lock added)

Definition at line 241 of file core_local.c.

{
    struct local_pvt *p = ast_channel_tech_pvt(chan);
 
    *tech_pvt = NULL;
    *base_chan = NULL;
    *base_owner = NULL;
 
    if (p) {
        *tech_pvt = ao2_bump(p);
        ast_unreal_lock_all(&p->base, base_chan, base_owner);
    }
}

References ao2_bump, ast_channel_tech_pvt(), ast_unreal_lock_all(), local_pvt::base, and NULL.

Referenced by attended_transfer_bridge().

ast_local_optimization_begin_type()

struct stasis_message_type * ast_local_optimization_begin_type

(

void

)

Message type for when a local channel optimization begins.

Since

12.0.0

Note

Payloads for the ast_local_optimization_begin_type are a ast_multi_channel_blob. Roles for the channels in the ast_multi_channel_blob are "1" and "2", reflecting the two halves.

Return values

A	Stasis Message Bus API message type

Referenced by ast_local_init(), AST_TEST_DEFINE(), create_routes(), local_message_to_ami(), local_optimization_started_cb(), local_shutdown(), and setup_stasis_subs().

ast_local_optimization_end_type()

struct stasis_message_type * ast_local_optimization_end_type

(

void

)

Message type for when a local channel optimization completes.

Since

12.0.0

Note

Payloads for the ast_local_optimization_end_type are a ast_multi_channel_blob. Roles for the channels in the ast_multi_channel_blob are "1" and "2", reflecting the two halves.

Return values

A	Stasis Message Bus API message type

Referenced by ast_local_init(), AST_TEST_DEFINE(), create_routes(), local_message_to_ami(), local_optimization_finished_cb(), local_shutdown(), and setup_stasis_subs().

ast_local_setup_bridge()

int ast_local_setup_bridge	(	struct ast_channel *	ast,
		struct ast_bridge *	bridge,
		struct ast_channel *	swap,
		struct ast_bridge_features *	features
	)

Setup the outgoing local channel to join a bridge on ast_call().

Since

12.0.0

Parameters

ast	Either channel of a local channel pair.
bridge	Bridge to join.
swap	Channel to swap with when joining.
features	Bridge features structure.

Note

The features parameter must be NULL or obtained by ast_bridge_features_new(). You must not dereference features after calling even if the call fails.

Intended to be called after ast_request() and before ast_call() on a local channel.

Return values

0	on success.
-1	on error.

Definition at line 601 of file core_local.c.

{
    struct local_pvt *p;
    struct local_pvt *found;
    int res = -1;
 
    /* Sanity checks. */
    if (!ast || !bridge) {
        ast_bridge_features_destroy(features);
        return -1;
    }
 
    ast_channel_lock(ast);
    p = ast_channel_tech_pvt(ast);
    ast_channel_unlock(ast);
 
    found = p ? ao2_find(locals, p, 0) : NULL;
    if (found) {
        ao2_lock(found);
        if (found->type == LOCAL_CALL_ACTION_DIALPLAN
            && found->base.owner
            && found->base.chan
            && !ast_test_flag(&found->base, AST_UNREAL_CARETAKER_THREAD)) {
            ao2_ref(bridge, +1);
            if (swap) {
                ast_channel_ref(swap);
            }
            found->type = LOCAL_CALL_ACTION_BRIDGE;
            found->action.bridge.join = bridge;
            found->action.bridge.swap = swap;
            found->action.bridge.features = features;
            res = 0;
        } else {
            ast_bridge_features_destroy(features);
        }
        ao2_unlock(found);
        ao2_ref(found, -1);
    }
 
    return res;
}

References local_pvt::action, ao2_find, ao2_lock, ao2_ref, ao2_unlock, ast_bridge_features_destroy(), ast_channel_lock, ast_channel_ref, ast_channel_tech_pvt(), ast_channel_unlock, ast_test_flag, AST_UNREAL_CARETAKER_THREAD, local_pvt::base, local_pvt::bridge, ast_unreal_pvt::chan, local_bridge::features, local_bridge::join, LOCAL_CALL_ACTION_BRIDGE, LOCAL_CALL_ACTION_DIALPLAN, locals, NULL, ast_unreal_pvt::owner, local_bridge::swap, and local_pvt::type.

Referenced by attended_transfer_bridge().

ast_local_setup_masquerade()

int ast_local_setup_masquerade	(	struct ast_channel *	ast,
		struct ast_channel *	masq
	)

Setup the outgoing local channel to masquerade into a channel on ast_call().

Since

12.0.0

Parameters

ast	Either channel of a local channel pair.
masq	Channel to masquerade into.

Note

Intended to be called after ast_request() and before ast_call() on a local channel.

Return values

0	on success.
-1	on error.

Definition at line 643 of file core_local.c.

{
    struct local_pvt *p;
    struct local_pvt *found;
    int res = -1;
 
    /* Sanity checks. */
    if (!ast || !masq) {
        return -1;
    }
 
    ast_channel_lock(ast);
    p = ast_channel_tech_pvt(ast);
    ast_channel_unlock(ast);
 
    found = p ? ao2_find(locals, p, 0) : NULL;
    if (found) {
        ao2_lock(found);
        if (found->type == LOCAL_CALL_ACTION_DIALPLAN
            && found->base.owner
            && found->base.chan
            && !ast_test_flag(&found->base, AST_UNREAL_CARETAKER_THREAD)) {
            ast_channel_ref(masq);
            found->type = LOCAL_CALL_ACTION_MASQUERADE;
            found->action.masq = masq;
            res = 0;
        }
        ao2_unlock(found);
        ao2_ref(found, -1);
    }
 
    return res;
}

References local_pvt::action, ao2_find, ao2_lock, ao2_ref, ao2_unlock, ast_channel_lock, ast_channel_ref, ast_channel_tech_pvt(), ast_channel_unlock, ast_test_flag, AST_UNREAL_CARETAKER_THREAD, local_pvt::base, ast_unreal_pvt::chan, LOCAL_CALL_ACTION_DIALPLAN, LOCAL_CALL_ACTION_MASQUERADE, locals, local_pvt::masq, NULL, ast_unreal_pvt::owner, and local_pvt::type.

Referenced by attended_transfer_bridge().

ast_local_unlock_all()

void ast_local_unlock_all	(	void *	tech_pvt,
		struct ast_channel *	base_chan,
		struct ast_channel *	base_owner
	)

Remove a reference to the given local channel's private tech, unlock the given local channel's private base, and remove references and unlock both sides of given the local channel.

Note

This function should be used in conjunction with ast_local_lock_all2.

Since

13.17.0, 14.6.0

Parameters

tech_pvt	channel's private tech (ref and lock removed)
base_chan	One side of the local channel (ref and lock removed)
base_owner	Other side of the local channel (ref and lock removed)

Definition at line 256 of file core_local.c.

{
    if (base_chan) {
        ast_channel_unlock(base_chan);
        ast_channel_unref(base_chan);
    }
 
    if (base_owner) {
        ast_channel_unlock(base_owner);
        ast_channel_unref(base_owner);
    }
 
    if (tech_pvt) {
        struct local_pvt *p = tech_pvt;
        ao2_unlock(&p->base);
        ao2_ref(tech_pvt, -1);
    }
}

References ao2_ref, ao2_unlock, ast_channel_unlock, ast_channel_unref, and local_pvt::base.

Referenced by attended_transfer_bridge().