BF: Remove manually unbanned IPs from persistent database

Stops them being restored when Fail2Ban is restarted. Particularly this
is an issue with bantime < 0

Fixes gh-768

ChangeLog

@@ -39,6 +39,8 @@ ver. 0.9.1 (2014/xx/xx) - better, faster, stronger
    * Per-distribution paths to the exim's main log
    * Ignored IPs are no longer banned when being restored from persistent
      database
+   * Manually unbanned IPs are now removed from persistent database, such they
+     wont be banned again when Fail2Ban is restarted
 
 - New features:
    - Added monit filter thanks Jason H Martin.

fail2ban/server/actions.py

@@ -197,6 +197,8 @@ class Actions(JailThread, Mapping):
 		if ticket is not None:
 			# Unban the IP.
 			self.__unBan(ticket)
+			if self._jail.database is not None:
+				self._jail.database.delBan(self._jail, ticket)
 		else:
 			raise ValueError("IP %s is not banned" % ip)
 

fail2ban/server/database.py

@@ -368,10 +368,25 @@ class Fail2BanDb(object):
 		#TODO: Implement data parts once arbitrary match keys completed
 		cur.execute(
 			"INSERT INTO bans(jail, ip, timeofban, data) VALUES(?, ?, ?, ?)",
-			(jail.name, ticket.getIP(), round(ticket.getTime()),
+			(jail.name, ticket.getIP(), int(round(ticket.getTime())),
 				{"matches": ticket.getMatches(),
 					"failures": ticket.getAttempt()}))
 
+	@commitandrollback
+	def delBan(self, cur, jail, ticket):
+		"""Delete a ban from the database.
+
+		Parameters
+		----------
+		jail : Jail
+			Jail in which the ban has occurred.
+		ticket : BanTicket
+			Ticket of the ban to be removed.
+		"""
+		cur.execute(
+			"DELETE FROM bans WHERE jail = ? AND ip = ? AND timeofban = ?",
+			(jail.name, ticket.getIP(), int(round(ticket.getTime()))))
+
 	@commitandrollback
 	def _getBans(self, cur, jail=None, bantime=None, ip=None):
 		query = "SELECT ip, timeofban, data FROM bans WHERE 1"

fail2ban/tests/databasetestcase.py

@@ -173,6 +173,12 @@ class DatabaseTest(unittest.TestCase):
 		self.assertTrue(
 			isinstance(self.db.getBans(jail=self.jail)[0], FailTicket))
 
+	def testDelBan(self):
+		self.testAddBan()
+		ticket = self.db.getBans(jail=self.jail)[0]
+		self.db.delBan(self.jail, ticket)
+		self.assertEqual(len(self.db.getBans(jail=self.jail)), 0)
+
 	def testGetBansWithTime(self):
 		if Fail2BanDb is None: # pragma: no cover
 			return