pjsip: Add rtp_timeout and rtp_timeout_hold endpoint options.

This change adds support for the 'rtp_timeout' and 'rtp_timeout_hold'
endpoint options. These allow the channel to be hung up if RTP
is not received from the remote endpoint for a specified number of
seconds.

ASTERISK-25259 #close

Change-Id: I3f39daaa7da2596b5022737b77799d16204175b9

include/asterisk/res_pjsip.h

@@ -504,6 +504,10 @@ struct ast_sip_media_rtp_configuration {
 	unsigned int encryption_optimistic;
 	/*! Number of seconds between RTP keepalive packets */
 	unsigned int keepalive;
+	/*! Number of seconds before terminating channel due to lack of RTP (when not on hold) */
+	unsigned int timeout;
+	/*! Number of seconds before terminating channel due to lack of RTP (when on hold) */
+	unsigned int timeout_hold;
 };
 
 /*!

include/asterisk/res_pjsip_session.h

@@ -79,6 +79,8 @@ struct ast_sip_session_media {
 	pj_str_t transport;
 	/*! \brief Scheduler ID for RTP keepalive */
 	int keepalive_sched_id;
+	/*! \brief Scheduler ID for RTP timeout */
+	int timeout_sched_id;
 	/*! \brief Stream is on hold by remote side */
 	unsigned int remotely_held:1;
 	/*! \brief Stream is on hold by local side */

include/asterisk/rtp_engine.h

@@ -2304,6 +2304,22 @@ time_t ast_rtp_instance_get_last_tx(const struct ast_rtp_instance *rtp);
  */
 void ast_rtp_instance_set_last_tx(struct ast_rtp_instance *rtp, time_t time);
 
+/*
+ * \brief Get the last RTP reception time
+ *
+ * \param rtp The instance from which to get the last reception time
+ * \return The last RTP reception time
+ */
+time_t ast_rtp_instance_get_last_rx(const struct ast_rtp_instance *rtp);
+
+/*!
+ * \brief Set the last RTP reception time
+ *
+ * \param rtp The instance on which to set the last reception time
+ * \param time The last reception time
+ */
+void ast_rtp_instance_set_last_rx(struct ast_rtp_instance *rtp, time_t time);
+
 /*! \addtogroup StasisTopicsAndMessages
  * @{
  */