New tag '<ip-host>' introduced: can be used in actions to retrieve the host name (dns) from the IP address

fail2ban/server/actions.py

@@ -291,6 +291,7 @@ class Actions(JailThread, Mapping):
 		AI_DICT = {
 			"ip":				lambda self: self.__ticket.getIP(),
 			"ip-rev":		lambda self: self['ip'].getPTR(''),
+			"ip-host":	lambda self: self['ip'].getHost(),
 			"fid":			lambda self: self.__ticket.getID(),
 			"failures":	lambda self: self.__ticket.getAttempt(),
 			"time":			lambda self: self.__ticket.getTime(),

fail2ban/server/ipdns.py

@@ -376,6 +376,11 @@ class IPAddr(object):
 
 		return "%s.%s" % (".".join(reversed(exploded_ip)), suffix)
 
+	def getHost(self):
+		"""Return the host name (DNS) of the provided IP address object
+		"""
+		return DNSUtils.ipToName(self.ntoa)
+
 	@property
 	def isIPv4(self):
 		"""Either the IP object is of address family AF_INET