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""" Test cases for twisted.protocols.ident module. """ import struct from twisted.protocols import ident from twisted.python import failure from twisted.internet import error from twisted.internet import defer from twisted.python.compat import NativeStringIO from twisted.trial import unittest from twisted.test.proto_helpers import StringTransport try: import builtins except ImportError: import __builtin__ as builtins class ClassParserTests(unittest.TestCase): """ Test parsing of ident responses. """ def setUp(self): """ Create an ident client used in tests. """ self.client = ident.IdentClient() def test_indentError(self): """ 'UNKNOWN-ERROR' error should map to the L{ident.IdentError} exception. """ d = defer.Deferred() self.client.queries.append((d, 123, 456)) self.client.lineReceived('123, 456 : ERROR : UNKNOWN-ERROR') return self.assertFailure(d, ident.IdentError) def test_noUSerError(self): """ 'NO-USER' error should map to the L{ident.NoUser} exception. """ d = defer.Deferred() self.client.queries.append((d, 234, 456)) self.client.lineReceived('234, 456 : ERROR : NO-USER') return self.assertFailure(d, ident.NoUser) def test_invalidPortError(self): """ 'INVALID-PORT' error should map to the L{ident.InvalidPort} exception. """ d = defer.Deferred() self.client.queries.append((d, 345, 567)) self.client.lineReceived('345, 567 : ERROR : INVALID-PORT') return self.assertFailure(d, ident.InvalidPort) def test_hiddenUserError(self): """ 'HIDDEN-USER' error should map to the L{ident.HiddenUser} exception. """ d = defer.Deferred() self.client.queries.append((d, 567, 789)) self.client.lineReceived('567, 789 : ERROR : HIDDEN-USER') return self.assertFailure(d, ident.HiddenUser) def test_lostConnection(self): """ A pending query which failed because of a ConnectionLost should receive an L{ident.IdentError}. """ d = defer.Deferred() self.client.queries.append((d, 765, 432)) self.client.connectionLost(failure.Failure(error.ConnectionLost())) return self.assertFailure(d, ident.IdentError) class TestIdentServer(ident.IdentServer): def lookup(self, serverAddress, clientAddress): return self.resultValue class TestErrorIdentServer(ident.IdentServer): def lookup(self, serverAddress, clientAddress): raise self.exceptionType() class NewException(RuntimeError): pass class ServerParserTests(unittest.TestCase): def testErrors(self): p = TestErrorIdentServer() p.makeConnection(StringTransport()) L = [] p.sendLine = L.append p.exceptionType = ident.IdentError p.lineReceived('123, 345') self.assertEqual(L[0], '123, 345 : ERROR : UNKNOWN-ERROR') p.exceptionType = ident.NoUser p.lineReceived('432, 210') self.assertEqual(L[1], '432, 210 : ERROR : NO-USER') p.exceptionType = ident.InvalidPort p.lineReceived('987, 654') self.assertEqual(L[2], '987, 654 : ERROR : INVALID-PORT') p.exceptionType = ident.HiddenUser p.lineReceived('756, 827') self.assertEqual(L[3], '756, 827 : ERROR : HIDDEN-USER') p.exceptionType = NewException p.lineReceived('987, 789') self.assertEqual(L[4], '987, 789 : ERROR : UNKNOWN-ERROR') errs = self.flushLoggedErrors(NewException) self.assertEqual(len(errs), 1) for port in -1, 0, 65536, 65537: del L[:] p.lineReceived('%d, 5' % (port,)) p.lineReceived('5, %d' % (port,)) self.assertEqual( L, ['%d, 5 : ERROR : INVALID-PORT' % (port,), '5, %d : ERROR : INVALID-PORT' % (port,)]) def testSuccess(self): p = TestIdentServer() p.makeConnection(StringTransport()) L = [] p.sendLine = L.append p.resultValue = ('SYS', 'USER') p.lineReceived('123, 456') self.assertEqual(L[0], '123, 456 : USERID : SYS : USER') if struct.pack('=L', 1)[0:1] == b'\x01': _addr1 = '0100007F' _addr2 = '04030201' else: _addr1 = '7F000001' _addr2 = '01020304' class ProcMixinTests(unittest.TestCase): line = ('4: %s:0019 %s:02FA 0A 00000000:00000000 ' '00:00000000 00000000 0 0 10927 1 f72a5b80 ' '3000 0 0 2 -1') % (_addr1, _addr2) sampleFile = (' sl local_address rem_address st tx_queue rx_queue tr ' 'tm->when retrnsmt uid timeout inode\n ' + line) def testDottedQuadFromHexString(self): p = ident.ProcServerMixin() self.assertEqual(p.dottedQuadFromHexString(_addr1), '127.0.0.1') def testUnpackAddress(self): p = ident.ProcServerMixin() self.assertEqual(p.unpackAddress(_addr1 + ':0277'), ('127.0.0.1', 631)) def testLineParser(self): p = ident.ProcServerMixin() self.assertEqual( p.parseLine(self.line), (('127.0.0.1', 25), ('1.2.3.4', 762), 0)) def testExistingAddress(self): username = [] p = ident.ProcServerMixin() p.entries = lambda: iter([self.line]) p.getUsername = lambda uid: (username.append(uid), 'root')[1] self.assertEqual( p.lookup(('127.0.0.1', 25), ('1.2.3.4', 762)), (p.SYSTEM_NAME, 'root')) self.assertEqual(username, [0]) def testNonExistingAddress(self): p = ident.ProcServerMixin() p.entries = lambda: iter([self.line]) self.assertRaises(ident.NoUser, p.lookup, ('127.0.0.1', 26), ('1.2.3.4', 762)) self.assertRaises(ident.NoUser, p.lookup, ('127.0.0.1', 25), ('1.2.3.5', 762)) self.assertRaises(ident.NoUser, p.lookup, ('127.0.0.1', 25), ('1.2.3.4', 763)) def testLookupProcNetTcp(self): """ L{ident.ProcServerMixin.lookup} uses the Linux TCP process table. """ open_calls = [] def mocked_open(*args, **kwargs): """ Mock for the open call to prevent actually opening /proc/net/tcp. """ open_calls.append((args, kwargs)) return NativeStringIO(self.sampleFile) self.patch(builtins, 'open', mocked_open) p = ident.ProcServerMixin() self.assertRaises(ident.NoUser, p.lookup, ('127.0.0.1', 26), ('1.2.3.4', 762)) self.assertEqual([(('/proc/net/tcp',), {})], open_calls)