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bridge core: Add owed T.38 terminate when channel leaves a bridge.

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The channel is now going to get T.38 terminated when it leaves the
bridging system and the bridged peers are going to get T.38 terminated as
well.

ASTERISK-25582

Change-Id: I77a9205979910210e3068e1ddff400dbf35c4ca7
This commit is contained in:
Richard Mudgett
2016-02-22 13:54:47 -06:00
parent 0a5bc64491
commit 221422be50
3 changed files with 72 additions and 0 deletions
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2
include/asterisk/bridge_channel.h
View File

@@ -170,6 +170,8 @@ struct ast_bridge_channel {
/*! Collected DTMF digits for DTMF hooks. */
char collected[MAXIMUM_DTMF_FEATURE_STRING];
} dtmf_hook_state;
/*! Non-zero if a T.38 session terminate is owed to the bridge. */
char owed_t38_terminate;
};
/*!

53
main/bridge_channel.c
View File

@@ -637,6 +637,8 @@ void ast_bridge_channel_kick(struct ast_bridge_channel *bridge_channel, int caus
*/
static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
{
const struct ast_control_t38_parameters *t38_parameters;
ast_assert(frame->frametype != AST_FRAME_BRIDGE_ACTION_SYNC);
ast_bridge_channel_lock_bridge(bridge_channel);
@@ -663,6 +665,27 @@ static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel,
* We explicitly will not remember HOLD/UNHOLD frames because
* things like attended transfers will handle them.
*/
switch (frame->subclass.integer) {
case AST_CONTROL_T38_PARAMETERS:
t38_parameters = frame->data.ptr;
switch (t38_parameters->request_response) {
case AST_T38_REQUEST_NEGOTIATE:
case AST_T38_NEGOTIATED:
bridge_channel->owed_t38_terminate = 1;
break;
case AST_T38_REQUEST_TERMINATE:
case AST_T38_TERMINATED:
case AST_T38_REFUSED:
bridge_channel->owed_t38_terminate = 0;
break;
default:
break;
}
break;
default:
break;
}
break;
default:
break;
}
@@ -689,6 +712,7 @@ static int bridge_channel_write_frame(struct ast_bridge_channel *bridge_channel,
static void bridge_channel_cancel_owed_events(struct ast_bridge_channel *bridge_channel)
{
bridge_channel->owed.dtmf_digit = '\0';
bridge_channel->owed_t38_terminate = 0;
}
void bridge_channel_settle_owed_events(struct ast_bridge *orig_bridge, struct ast_bridge_channel *bridge_channel)
@@ -710,6 +734,23 @@ void bridge_channel_settle_owed_events(struct ast_bridge *orig_bridge, struct as
bridge_channel->owed.dtmf_digit = '\0';
orig_bridge->technology->write(orig_bridge, NULL, &frame);
}
if (bridge_channel->owed_t38_terminate) {
struct ast_control_t38_parameters t38_parameters = {
.request_response = AST_T38_TERMINATED,
};
struct ast_frame frame = {
.frametype = AST_FRAME_CONTROL,
.subclass.integer = AST_CONTROL_T38_PARAMETERS,
.data.ptr = &t38_parameters,
.datalen = sizeof(t38_parameters),
.src = "Bridge channel owed T.38 terminate",
};
ast_debug(1, "T.38 terminate simulated to bridge %s because %s left.\n",
orig_bridge->uniqueid, ast_channel_name(bridge_channel->chan));
bridge_channel->owed_t38_terminate = 0;
orig_bridge->technology->write(orig_bridge, NULL, &frame);
}
}
/*!
@@ -2736,6 +2777,18 @@ int bridge_channel_internal_join(struct ast_bridge_channel *bridge_channel,
ast_channel_sending_dtmf_tv(bridge_channel->chan), "bridge end");
}
/* Complete any T.38 session before exiting the bridge. */
if (ast_channel_is_t38_active(bridge_channel->chan)) {
struct ast_control_t38_parameters t38_parameters = {
.request_response = AST_T38_TERMINATED,
};
ast_debug(1, "Channel %s simulating T.38 terminate for bridge end.\n",
ast_channel_name(bridge_channel->chan));
ast_indicate_data(bridge_channel->chan, AST_CONTROL_T38_PARAMETERS,
&t38_parameters, sizeof(t38_parameters));
}
/* Indicate a source change since this channel is leaving the bridge system. */
ast_indicate(bridge_channel->chan, AST_CONTROL_SRCCHANGE);

17
main/channel.c
View File

@@ -4479,6 +4479,7 @@ static int indicate_data_internal(struct ast_channel *chan, int _condition, cons
* in switch statements. */
enum ast_control_frame_type condition = _condition;
struct ast_tone_zone_sound *ts = NULL;
const struct ast_control_t38_parameters *t38_parameters;
int res;
switch (condition) {
@@ -4498,6 +4499,22 @@ static int indicate_data_internal(struct ast_channel *chan, int _condition, cons
case AST_CONTROL_UNHOLD:
ast_channel_hold_state_set(chan, _condition);
break;
case AST_CONTROL_T38_PARAMETERS:
t38_parameters = data;
switch (t38_parameters->request_response) {
case AST_T38_REQUEST_NEGOTIATE:
case AST_T38_NEGOTIATED:
ast_channel_set_is_t38_active_nolock(chan, 1);
break;
case AST_T38_REQUEST_TERMINATE:
case AST_T38_TERMINATED:
case AST_T38_REFUSED:
ast_channel_set_is_t38_active_nolock(chan, 0);
break;
default:
break;
}
break;
default:
break;
}