modules/sca: AoR should not be treated as SCA if there are no subscribers.

(cherry picked from commit a8fb905e8bf27093dcf86866ae946431ed441a41)

modules/sca/sca_appearance.c

@@ -386,6 +386,24 @@ done:
     return( rc );
 }
 
+    int
+sca_appearance_unregister( sca_mod *scam, str *aor )
+{
+    int			rc = 0;
+
+    assert( scam != NULL );
+    assert( aor != NULL );
+
+    if ( sca_uri_is_shared_appearance( scam, aor )) {
+	if (( rc = sca_hash_table_kv_delete( scam->appearances, aor )) == 0 ) {
+	    rc = 1;
+	    LM_INFO( "unregistered SCA AoR %.*s", STR_FMT( aor ));
+	}
+    }
+
+    return( rc );
+}
+
     sca_appearance *
 sca_appearance_seize_index_unsafe( sca_mod *scam, str *aor, str *owner_uri,
 	int app_idx, int slot_idx, int *seize_error )

modules/sca/sca_appearance.h

@@ -155,6 +155,7 @@ sca_appearance	*sca_appearance_for_tags_unsafe( sca_mod *, str *,
 						str *, str *, str *, int );
 
 int	sca_appearance_register( sca_mod *, str * );
+int	sca_appearance_unregister( sca_mod *, str * );
 void	sca_appearance_list_insert_appearance( sca_appearance_list *,
 						sca_appearance * );
 sca_appearance	*sca_appearance_list_unlink_index( sca_appearance_list *, int );

modules/sca/sca_call_info.c

@@ -1979,12 +1979,14 @@ sca_call_info_update( sip_msg_t *msg, char *p1, char *p2 )
 	    if ( !sca_subscription_aor_has_subscribers(
 				SCA_EVENT_TYPE_CALL_INFO, &from_aor )) {
 		call_info.ua_shared &= ~SCA_CALL_INFO_SHARED_CALLER;
+		sca_appearance_unregister( sca, &from_aor );
 	    }
 	} else if ( SCA_CALL_INFO_IS_SHARED_CALLEE( &call_info ) &&
 		msg->first_line.type == SIP_REPLY ) {
 	    if ( !sca_subscription_aor_has_subscribers(
 				SCA_EVENT_TYPE_CALL_INFO, &to_aor )) {
 		call_info.ua_shared &= ~SCA_CALL_INFO_SHARED_CALLEE;
+		sca_appearance_unregister( sca, &to_aor );
 	    }
 	}
     }