removing unnecessary linked agent messages

Author: its-a-feature

CHANGELOG.MD

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.3.0-rc20] - 2024-08-23
+
+### Changed
+
+- Updated the delegate checks for socks/rpfwd/interactive messages to only send delegates if there's data
+
 ## [3.3.0-rc19] - 2024-08-21
 
 ### Changed

VERSION

@@ -1 +1 @@
-3.3.0-rc19
+3.3.0-rc20

mythic-docker/src/VERSION

@@ -1 +1 @@
-3.3.0-rc19
+3.3.0-rc20

mythic-docker/src/rabbitmq/util_agent_message_actions_get_tasking.go

@@ -197,7 +197,7 @@ func getDelegateProxyMessages(callbackID int, agentUUIDLength int, updateCheckin
 				// there's a route between our callback and the target callback for some sort of proxy data
 				if messages, err := proxyPorts.GetDataForCallbackId(targetCallbackId, CALLBACK_PORT_TYPE_SOCKS); err != nil {
 					logging.LogError(err, "Failed to get socks proxy data for routable callback")
-				} else {
+				} else if messages != nil {
 					// now that we have a path, need to recursively encrypt and wrap
 					newTask := map[string]interface{}{
 						"action":                 "get_tasking",
@@ -215,7 +215,7 @@ func getDelegateProxyMessages(callbackID int, agentUUIDLength int, updateCheckin
 				}
 				if messages, err := proxyPorts.GetDataForCallbackId(targetCallbackId, CALLBACK_PORT_TYPE_RPORTFWD); err != nil {
 					logging.LogError(err, "Failed to get rpfwd proxy data for routable callback")
-				} else {
+				} else if messages != nil {
 					// now that we have a path, need to recursively encrypt and wrap
 					newTask := map[string]interface{}{
 						"action":                    "get_tasking",
@@ -233,7 +233,7 @@ func getDelegateProxyMessages(callbackID int, agentUUIDLength int, updateCheckin
 				}
 				if messages, err := proxyPorts.GetDataForCallbackId(targetCallbackId, CALLBACK_PORT_TYPE_INTERACTIVE); err != nil {
 					logging.LogError(err, "Failed to get interactive proxy data for routable callback")
-				} else {
+				} else if messages != nil {
 					// now that we have a path, need to recursively encrypt and wrap
 					newTask := map[string]interface{}{
 						"action":                       "get_tasking",