pjsip: reinvite for connected line updates occurs when it should not

Connected line updates are now only sent out if an actual update needs to occur.
This happens under the following conditions:

1. The endpoint we are sending to is trusted.
2. Either a P-Asserted-Identity or Remote Party-ID header needs to be added/sent.
3. The connected id's number and name are valid.

Also added an SDP when an update is sent out.

(closes issue AST-1212)
Reported by: John Bigelow
Review: https://reviewboard.asterisk.org/r/2831/
........

Merged revisions 398806 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@398808 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_pjsip.c

@@ -1077,6 +1077,7 @@ static int transmit_info_with_vidupdate(void *data)
 static int update_connected_line_information(void *data)
 {
 	RAII_VAR(struct ast_sip_session *, session, data, ao2_cleanup);
+	struct ast_party_id connected_id;
 
 	if ((ast_channel_state(session->channel) != AST_STATE_UP) && (session->inv_session->role == PJSIP_UAS_ROLE)) {
 		int response_code = 0;
@@ -1101,7 +1102,13 @@ static int update_connected_line_information(void *data)
 			method = AST_SIP_SESSION_REFRESH_METHOD_UPDATE;
 		}
 
-		ast_sip_session_refresh(session, NULL, NULL, NULL, method, 0);
+		connected_id = ast_channel_connected_effective_id(session->channel);
+		if ((session->endpoint->id.send_pai || session->endpoint->id.send_rpid) &&
+		    (session->endpoint->id.trust_outbound ||
+		     ((connected_id.name.presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED &&
+		      (connected_id.number.presentation & AST_PRES_RESTRICTION) == AST_PRES_ALLOWED))) {
+			ast_sip_session_refresh(session, NULL, NULL, NULL, method, 1);
+		}
 	}
 
 	return 0;

res/res_pjsip_caller_id.c

@@ -662,9 +662,6 @@ static void caller_id_outgoing_request(struct ast_sip_session *session, pjsip_tx
 
 		modify_id_header(tdata->pool, from, &connected_id);
 		modify_id_header(dlg->pool, dlg->local.info, &connected_id);
-		if (should_queue_connected_line_update(session, &session->endpoint->id.self)) {
-			queue_connected_line_update(session, &session->endpoint->id.self);
-		}
 	}
 	add_id_headers(session, tdata, &connected_id);
 }
@@ -674,7 +671,7 @@ static void caller_id_outgoing_request(struct ast_sip_session *session, pjsip_tx
  * \brief Session supplement for outgoing INVITE response
  *
  * This will add P-Asserted-Identity and Remote-Party-ID headers if necessary
- * 
+ *
  * \param session The session on which the INVITE response is to be sent
  * \param tdata The outbound INVITE response
  */