Merge pull request #1705 from sebres/0.10-tag-ip-host

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

ChangeLog

@@ -17,6 +17,8 @@ TODO: implementing of options resp. other tasks from PR #1346
   - [grave] injection on user name to host fixed
 * `action.d/complain.conf`
   - fixed using new tag `<ip-rev>` (sh/dash compliant now)
+* `action.d/sendmail-geoip-lines.conf`
+  - fixed using new tag `<ip-host>` (without external command execution)
 
 ### New Features
 * New Actions:
@@ -44,7 +46,11 @@ TODO: implementing of options resp. other tasks from PR #1346
   to re.sub with callable)
 * substituteRecursiveTags optimization + moved in helpers facilities (because currently used 
   commonly in server and in client)
-* Provides new tag `<ip-rev>` for PTR reversed representation of IP address
+* New tags (usable in actions):
+  - `<fid>` - failure identifier (if raw resp. failures without IP address)
+  - `<ip-rev>` - PTR reversed representation of IP address
+  - `<ip-host>` - host name of the IP address
+  - `<F-...>` - interpolates to the corresponding filter group capture `...`
 
 
 ver. 0.10.0-alpha-1 (2016/07/14) - ipv6-support-etc

config/action.d/sendmail-geoip-lines.conf

@@ -36,7 +36,7 @@ actionban = ( printf %%b "Subject: [Fail2Ban] <name>: banned <ip> from `uname -n
             http://whois.domaintools.com/<ip>\n\n
             Country:`geoiplookup -f /usr/share/GeoIP/GeoIP.dat "<ip>" | cut -d':' -f2-`
             AS:`geoiplookup -f /usr/share/GeoIP/GeoIPASNum.dat "<ip>" | cut -d':' -f2-`
-            hostname: `host -t A <ip> 2>&1`\n\n
+            hostname: <ip-host>\n\n
             Lines containing failures of <ip>\n";
             %(_grep_logs)s;
             printf %%b "\n

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

fail2ban/tests/servertestcase.py

@@ -38,7 +38,9 @@ from ..server.server import Server
 from ..server.ipdns import IPAddr
 from ..server.jail import Jail
 from ..server.jailthread import JailThread
+from ..server.ticket import BanTicket
 from ..server.utils import Utils
+from .dummyjail import DummyJail
 from .utils import LogCaptureTestCase
 from ..helpers import getLogger, PREFER_ENC
 from .. import version
@@ -1677,7 +1679,7 @@ class ServerConfigReaderTests(LogCaptureTestCase):
 				# complain --
 				('j-complain-abuse', 
 					'complain['
-					  'name=%(__name__)s, grepopts="-m 1", grepmax=2, mailcmd="mail -s",' +
+					  'name=%(__name__)s, grepopts="-m 1", grepmax=2, mailcmd="mail -s Hostname: <ip-host> - ",' +
 					  # test reverse ip:
 					  'debug=1,' +
 						# 2 logs to test grep from multiple logs:
@@ -1692,14 +1694,14 @@ class ServerConfigReaderTests(LogCaptureTestCase):
 						'testcase01.log:Dec 31 11:59:59 [sshd] error: PAM: Authentication failure for kevin from 87.142.124.10',
 						'testcase01a.log:Dec 31 11:55:01 [sshd] error: PAM: Authentication failure for test from 87.142.124.10',
 						# both abuse mails should be separated with space:
-						'mail -s Abuse from 87.142.124.10 abuse-1@abuse-test-server abuse-2@abuse-test-server',
+						'mail -s Hostname: test-host - Abuse from 87.142.124.10 abuse-1@abuse-test-server abuse-2@abuse-test-server',
 					),
 					'ip6-ban': (
 						# test reverse ip:
 						'try to resolve 1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.abuse-contacts.abusix.org',
 						'Lines containing failures of 2001:db8::1 (max 2)',
 						# both abuse mails should be separated with space:
-						'mail -s Abuse from 2001:db8::1 abuse-1@abuse-test-server abuse-2@abuse-test-server',
+						'mail -s Hostname: test-host - Abuse from 2001:db8::1 abuse-1@abuse-test-server abuse-2@abuse-test-server',
 					),
 				}),
 			)
@@ -1723,6 +1725,7 @@ class ServerConfigReaderTests(LogCaptureTestCase):
 
 			ipv4 = IPAddr('87.142.124.10')
 			ipv6 = IPAddr('2001:db8::1');
+			dmyjail = DummyJail()
 			for jail, act, tests in testJailsActions:
 				# print(jail, jails[jail])
 				for a in jails[jail].actions:
@@ -1736,7 +1739,8 @@ class ServerConfigReaderTests(LogCaptureTestCase):
 					for (test, ip) in (('ip4-ban', ipv4), ('ip6-ban', ipv6)):
 						if not tests.get(test): continue
 						self.pruneLog('# === %s ===' % test)
-						ticket = _actions.CallingMap({
-							'ip': ip, 'ip-rev': lambda self: self['ip'].getPTR(''), 'failures': 100,})
+						ticket = BanTicket(ip)
+						ticket.setAttempt(100)
+						ticket = _actions.Actions.ActionInfo(ticket, dmyjail)
 						action.ban(ticket)
 						self.assertLogged(*tests[test], all=True)

fail2ban/tests/utils.py

@@ -273,6 +273,9 @@ def initTests(opts):
 		c.set('192.0.2.%s' % i, None)
 		c.set('198.51.100.%s' % i, None)
 		c.set('203.0.113.%s' % i, None)
+		c.set('2001:db8::%s' %i, 'test-host')
+	# some legal ips used in our test cases (prevent slow dns-resolving and failures if will be changed later):
+	c.set('87.142.124.10', 'test-host')
 	if unittest.F2B.no_network: # pragma: no cover
 		# precache all wrong dns to ip's used in test cases:
 		c = DNSUtils.CACHE_nameToIp