channel api: Create is_t38_active accessor functions.

ASTERISK-25582

Change-Id: I69451920b122de7ee18d15bb231c80ea7067a22b

include/asterisk/channel.h

@@ -1595,6 +1595,42 @@ void ast_channel_set_unbridged(struct ast_channel *chan, int value);
  */
 void ast_channel_set_unbridged_nolock(struct ast_channel *chan, int value);
 
+/*!
+ * \brief This function will check if T.38 is active on the channel.
+ *
+ * \param chan Channel on which to check the unbridge_eval flag
+ *
+ * \return Returns 0 if the flag is down or 1 if the flag is up.
+ */
+int ast_channel_is_t38_active(struct ast_channel *chan);
+
+/*!
+ * \brief ast_channel_is_t38_active variant. Use this if the channel
+ *         is already locked prior to calling.
+ *
+ * \param chan Channel on which to check the is_t38_active flag
+ *
+ * \return Returns 0 if the flag is down or 1 if the flag is up.
+ */
+int ast_channel_is_t38_active_nolock(struct ast_channel *chan);
+
+/*!
+ * \brief Sets the is_t38_active flag
+ *
+ * \param chan Which channel is having its is_t38_active value set
+ * \param is_t38_active Non-zero if T.38 is active
+ */
+void ast_channel_set_is_t38_active(struct ast_channel *chan, int is_t38_active);
+
+/*!
+ * \brief Variant of ast_channel_set_is_t38_active. Use this if the channel
+ *         is already locked prior to calling.
+ *
+ * \param chan Which channel is having its is_t38_active value set
+ * \param is_t38_active Non-zero if T.38 is active
+ */
+void ast_channel_set_is_t38_active_nolock(struct ast_channel *chan, int is_t38_active);
+
 /*!
  * \brief Lock the given channel, then request softhangup on the channel with the given causecode
  * \param chan channel on which to hang up

main/channel_internal_api.c

@@ -173,8 +173,6 @@ struct ast_channel {
 							 *   See \arg \ref AstFileDesc */
 	int softhangup;				/*!< Whether or not we have been hung up...  Do not set this value
 							 *   directly, use ast_softhangup() */
-	int unbridged;              /*!< If non-zero, the bridge core needs to re-evaluate the current
-	                                 bridging technology which is in use by this channel's bridge. */
 	int fdno;					/*!< Which fd had an event detected on */
 	int streamid;					/*!< For streaming playback, the schedule ID */
 	int vstreamid;					/*!< For streaming video playback, the schedule ID */
@@ -216,6 +214,9 @@ struct ast_channel {
 	char exten[AST_MAX_EXTENSION];			/*!< Dialplan: Current extension number */
 	char macrocontext[AST_MAX_CONTEXT];		/*!< Macro: Current non-macro context. See app_macro.c */
 	char macroexten[AST_MAX_EXTENSION];		/*!< Macro: Current non-macro extension. See app_macro.c */
+	char unbridged;							/*!< non-zero if the bridge core needs to re-evaluate the current
+											 bridging technology which is in use by this channel's bridge. */
+	char is_t38_active;						/*!< non-zero if T.38 is active on this channel. */
 	char dtmf_digit_to_emulate;			/*!< Digit being emulated */
 	char sending_dtmf_digit;			/*!< Digit this channel is currently sending out. (zero if not sending) */
 	struct timeval sending_dtmf_tv;		/*!< The time this channel started sending the current digit. (Invalid if sending_dtmf_digit is zero.) */
@@ -1146,7 +1147,7 @@ int ast_channel_unbridged(struct ast_channel *chan)
 
 void ast_channel_set_unbridged_nolock(struct ast_channel *chan, int value)
 {
-	chan->unbridged = value;
+	chan->unbridged = !!value;
 	ast_queue_frame(chan, &ast_null_frame);
 }
 
@@ -1157,6 +1158,33 @@ void ast_channel_set_unbridged(struct ast_channel *chan, int value)
 	ast_channel_unlock(chan);
 }
 
+int ast_channel_is_t38_active_nolock(struct ast_channel *chan)
+{
+	return chan->is_t38_active;
+}
+
+int ast_channel_is_t38_active(struct ast_channel *chan)
+{
+	int res;
+
+	ast_channel_lock(chan);
+	res = ast_channel_is_t38_active_nolock(chan);
+	ast_channel_unlock(chan);
+	return res;
+}
+
+void ast_channel_set_is_t38_active_nolock(struct ast_channel *chan, int is_t38_active)
+{
+	chan->is_t38_active = !!is_t38_active;
+}
+
+void ast_channel_set_is_t38_active(struct ast_channel *chan, int is_t38_active)
+{
+	ast_channel_lock(chan);
+	ast_channel_set_is_t38_active_nolock(chan, is_t38_active);
+	ast_channel_unlock(chan);
+}
+
 void ast_channel_callid_cleanup(struct ast_channel *chan)
 {
 	chan->callid = 0;