Added "list stale" and "remove stale" agents commands to list/remove

agents past their max checkins.

changelog

@@ -2,6 +2,7 @@
 ---------
 -Merged in Lost Agent Detection
 -"agents> remove X" now removes agents that checked in > X minutes ago
+-"agents> list stale" and "agents> remove stale" now list/remove stale agents past their max checkins
 
 8/10/2015
 ---------

lib/common/empire.py

@@ -628,7 +628,28 @@ class AgentsMenu(cmd.Cmd):
 
         agents = self.mainMenu.agents.get_agents()
 
-        if line.strip() != "":
+        if line.strip().lower() == "stale":
+
+            displayAgents = []
+
+            for agent in agents:
+
+                sessionID = self.mainMenu.agents.get_agent_id(agent[3])
+
+                # max check in -> delay + delay*jitter
+                intervalMax = agent[4] + agent[4] * agent[5]
+
+                # get the agent last check in time
+                agentTime = time.mktime(time.strptime(agent[16],"%Y-%m-%d %H:%M:%S"))
+
+                if agentTime < time.mktime(time.localtime()) - intervalMax:
+                    # if the last checkin time exceeds the limit, remove it
+                    displayAgents.append(agent)
+
+            messages.display_agents(displayAgents)
+
+
+        elif line.strip() != "":
             # if we're listing an agents active in the last X minutes
             try:
                 minutes = int(line.strip())
@@ -913,7 +934,27 @@ class AgentsMenu(cmd.Cmd):
                     self.mainMenu.agents.remove_agent('%')
             except KeyboardInterrupt as e: print ""
 
-        if name.isdigit():
+        elif name.lower() == "stale":
+            # remove 'stale' agents that have missed their checkin intervals
+            
+            agents = self.mainMenu.agents.get_agents()
+
+            for agent in agents:
+
+                sessionID = self.mainMenu.agents.get_agent_id(agent[3])
+
+                # max check in -> delay + delay*jitter
+                intervalMax = agent[4] + agent[4] * agent[5]
+
+                # get the agent last check in time
+                agentTime = time.mktime(time.strptime(agent[16],"%Y-%m-%d %H:%M:%S"))
+
+                if agentTime < time.mktime(time.localtime()) - intervalMax:
+                    # if the last checkin time exceeds the limit, remove it
+                    self.mainMenu.agents.remove_agent(sessionID) 
+
+
+        elif name.isdigit():
             # if we're removing agents that checked in longer than X minutes ago
             agents = self.mainMenu.agents.get_agents()
 
@@ -936,6 +977,7 @@ class AgentsMenu(cmd.Cmd):
                 print helpers.color("[!] Please enter the minute window for agent checkin.")
 
         else:
+            print "agent name!"
             # extract the sessionID and clear the agent tasking
             sessionID = self.mainMenu.agents.get_agent_id(name)