def test_server_side_invalid_2(self):
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = CryptoHandshaker(p, now)
p.init_handler(hs.gen_handler())
p.makeConnection(t)
self.assertEquals(t.value(), '')
ver_pkt = struct.pack('B', self.protocol_version)
invalid_hs_data = (('abcdefg' * int(self.handshake_length * 2 / 7)) +
'abcdefg'[:int(self.handshake_length * 2 % 7)])
# version is ok
err = p.dataReceived(ver_pkt)
self.assertIdentical(err, None)
# ... but the rest is just (the right amount of) rubbish
err = p.dataReceived(invalid_hs_data)
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(t.disconnecting, 'should not be disconnecting')
self.assertEquals(p.handshake_status, 'fail')
def test_server_side_invalid_2(self):
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = Handshaker(p, now)
p.init_handler(hs.gen_handler())
p.makeConnection(t)
self.assertEquals(t.value(), '')
ver_pkt = struct.pack('B', self.protocol_version)
invalid_hs_data = (('abcdefg' * int(self.handshake_length * 2 / 7)) +
'abcdefg'[:int(self.handshake_length * 2 % 7)])
# version is ok
err = p.dataReceived(ver_pkt)
self.assertIdentical(err, None)
# ... but the rest is just (the right amount of) rubbish
err = p.dataReceived(invalid_hs_data)
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(t.disconnecting, 'should not be disconnecting')
self.assertEquals(p.handshake_status, 'fail')
def test_many_headers(self):
# OK, this test is a bit brittle, as we assume the following
# properties of the encoder/muxer:
# * it will allocate new chunk stream ids as long as we
# provide it with unseen combinations of type and message
# stream id
# * the allocated ids will be consecutive numbers
# * given the exactly same args to sendMessage the second call
# will produce a bitstream of a message with completely
# compressed header
#
# At the moment that seems the only reasonable way to force
# muxer to use higher chunk stream ids, with different levels
# of header compression, using only the public API...
# for now, make sure we're using SimpleChunkProducer:
class LocalTestMuxer(Muxer):
chunk_producer_class = chunks.SimpleChunkProducer
# first, generate and mux a whole bunch of messages
tm = StringTransport()
mux = LocalTestMuxer(tm)
for i in range(256 + 64 + 1):
mux.sendMessage(0, chunks.MSG_DATA, i, VecBuf(['']))
mux.sendMessage(0, chunks.MSG_DATA, i, VecBuf(['']))
# ... now demux the resulting binary data
td = StringTransport()
p = TestDemuxerProtocol()
dmx = MessagePassingDemuxer(p)
p.init_handler(dmx.gen_handler())
p.makeConnection(td)
p.dataReceived(tm.value())
demuxed = p.pop_messages()
# ... and check it maches the result we expect based on the
# above assumptions
first_csid = demuxed[0][0].cs_id
for i in range(256 + 64 + 1):
h, body = demuxed[2 * i]
self.assertEquals((h.cs_id, h.real_time, h.real_size, h.real_type,
h.real_ms_id),
(i + first_csid, 0, 0, 18, i))
self.assertEquals((h.cs_id, h.time, h.size, h.type, h.ms_id),
(i + first_csid, 0, 0, 18, i))
self.assertEquals(len(body), 0)
h, body = demuxed[2 * i + 1]
self.assertEquals((h.cs_id, h.real_time, h.real_size, h.real_type,
h.real_ms_id),
(i + first_csid, None, None, None, None))
self.assertEquals((h.cs_id, h.time, h.size, h.type, h.ms_id),
(i + first_csid, 0, 0, 18, i))
self.assertEquals(len(body), 0)
def test_combined(self):
d_in = {}
d_out = {}
type_reverse = { 1: chunks.PROTO_SET_CHUNK_SIZE,
4: chunks.PROTO_USER_CONTROL,
5: chunks.PROTO_WINDOW_SIZE,
6: chunks.PROTO_SET_BANDWIDTH,
8: chunks.MSG_AUDIO,
9: chunks.MSG_VIDEO,
20: chunks.MSG_COMMAND }
# for now, make sure we're using SimpleChunkProducer:
class LocalTestMuxer(Muxer):
chunk_producer_class = chunks.SimpleChunkProducer
# mux messages first
tm = StringTransport()
mux = LocalTestMuxer(tm)
for msg in messages:
if not msg:
continue
head, body = msg
msg_type = type_reverse[head[4]]
mux.sendMessage(head[1], msg_type, head[5], VecBuf([body]))
if msg_type == chunks.PROTO_SET_CHUNK_SIZE:
mux.set_chunk_size(int(body.encode('hex'), 16))
d_in.setdefault(head[4], []).append((head[1], head[4], head[5],
body))
# ... now try to demux the resulting binary data
td = StringTransport()
p = TestDemuxerProtocol()
dmx = MessagePassingDemuxer(p)
p.init_handler(dmx.gen_handler())
p.makeConnection(td)
p.dataReceived(tm.value())
demuxed = p.pop_messages()
# we can't rely on the received messages to be in the exact
# same order as the sent ones...
for head, body in demuxed:
d_out.setdefault(head.type, []).append((head.abs_time,
head.type,
head.ms_id,
body.read(len(body))))
self.assertEquals(d_in, d_out)
def test_server_side_ok_plus(self):
# similar as with test_complete_exchange_plus() - feeding some
# additional data immediately following handshake data
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = Handshaker(p, now)
p.init_handler(hs.gen_handler())
p.makeConnection(t)
# server shouldn't respond before spoken to
self.assertEquals(t.value(), '')
ver_pkt = struct.pack('B', self.protocol_version)
err = p.dataReceived(ver_pkt)
self.assertIdentical(err, None)
# server may wait until it receives handshake packet before
# responding, so not testing here
hs_rand_data = '.' * (self.handshake_length - 8)
timestamp = 42
hs_pkt = struct.pack('>LL', timestamp, 0) + hs_rand_data
err = p.dataReceived(hs_pkt)
self.assertIdentical(err, None)
# ... and here the server might send all the packets already,
# and our implementation should do so, so that's what we test
self.assert_(
len(t.value()) == 1 + self.handshake_length * 2,
'Response too short (%d)' % len(t.value()))
self.assertEquals(
struct.unpack_from('B', t.value(), 0)[0], self.protocol_version)
srv_hs_pkt = t.value()[1:1 + self.handshake_length]
hs_pkt_echo = t.value()[1 + self.handshake_length:1 +
self.handshake_length * 2]
self.assertEquals(
struct.unpack_from('>L', hs_pkt_echo, 0)[0], timestamp)
self.assertEquals(hs_pkt_echo[8:], hs_rand_data)
# server response ok, let's finish the server side, and
# pretend client starts sending more data
err = p.dataReceived(srv_hs_pkt + '\x00')
self.assertIdentical(err, None)
self.assertFalse(t.disconnecting, 'disconnecting')
self.assertEquals(p.handshake_status, 'ok')
def test_client_side_ok(self):
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = Handshaker(p, now, is_client=True)
# can't initiate client handler before making connection
p.init_handler(hs.gen_handler(), do_init=False)
p.makeConnection(t)
# client side is the active one
self.assertEquals(t.value(), '')
# ... once initiated
p.init_handler()
# after that the handling is almost identical to the server side...
ver_pkt = struct.pack('B', self.protocol_version)
err = p.dataReceived(ver_pkt)
self.assertIdentical(err, None)
hs_rand_data = '.' * (self.handshake_length - 8)
timestamp = 42
hs_pkt = struct.pack('>LL', timestamp, 0) + hs_rand_data
err = p.dataReceived(hs_pkt)
self.assertIdentical(err, None)
self.assert_(
len(t.value()) == 1 + self.handshake_length * 2,
'Response too short (%d)' % len(t.value()))
self.assertEquals(
struct.unpack_from('B', t.value(), 0)[0], self.protocol_version)
cli_hs_pkt = t.value()[1:1 + self.handshake_length]
hs_pkt_echo = t.value()[1 + self.handshake_length:1 +
self.handshake_length * 2]
self.assertEquals(
struct.unpack_from('>L', hs_pkt_echo, 0)[0], timestamp)
self.assertEquals(hs_pkt_echo[8:], hs_rand_data)
err = p.dataReceived(cli_hs_pkt)
self.assertIdentical(err, None)
self.assertFalse(t.disconnecting, 'disconnecting')
self.assertEquals(p.handshake_status, 'ok')
def test_server_side_ok_plus(self):
# similar as with test_complete_exchange_plus() - feeding some
# additional data immediately following handshake data
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = Handshaker(p, now)
p.init_handler(hs.gen_handler())
p.makeConnection(t)
# server shouldn't respond before spoken to
self.assertEquals(t.value(), '')
ver_pkt = struct.pack('B', self.protocol_version)
err = p.dataReceived(ver_pkt)
self.assertIdentical(err, None)
# server may wait until it receives handshake packet before
# responding, so not testing here
hs_rand_data = '.' * (self.handshake_length - 8)
timestamp = 42
hs_pkt = struct.pack('>LL', timestamp, 0) + hs_rand_data
err = p.dataReceived(hs_pkt)
self.assertIdentical(err, None)
# ... and here the server might send all the packets already,
# and our implementation should do so, so that's what we test
self.assert_(len(t.value()) == 1 + self.handshake_length * 2,
'Response too short (%d)' % len(t.value()))
self.assertEquals(struct.unpack_from('B', t.value(), 0)[0],
self.protocol_version)
srv_hs_pkt = t.value()[1:1+self.handshake_length]
hs_pkt_echo = t.value()[1+self.handshake_length:
1+self.handshake_length*2]
self.assertEquals(struct.unpack_from('>L', hs_pkt_echo, 0)[0],
timestamp)
self.assertEquals(hs_pkt_echo[8:], hs_rand_data)
# server response ok, let's finish the server side, and
# pretend client starts sending more data
err = p.dataReceived(srv_hs_pkt + '\x00')
self.assertIdentical(err, None)
self.assertFalse(t.disconnecting, 'disconnecting')
self.assertEquals(p.handshake_status, 'ok')
def test_server_side_invalid_1(self):
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = CryptoHandshaker(p, now)
p.init_handler(hs.gen_handler())
p.makeConnection(t)
self.assertEquals(t.value(), '')
# sending version different from the server's version
ver_pkt = struct.pack('B', self.protocol_version + 1)
err = p.dataReceived(ver_pkt)
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(t.disconnecting, 'should not be disconnecting')
self.assertEquals(p.handshake_status, 'fail')
def test_server_side_invalid_1(self):
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = Handshaker(p, now)
p.init_handler(hs.gen_handler())
p.makeConnection(t)
self.assertEquals(t.value(), '')
# sending version different from the server's version
ver_pkt = struct.pack('B', self.protocol_version + 1)
err = p.dataReceived(ver_pkt)
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(t.disconnecting, 'should not be disconnecting')
self.assertEquals(p.handshake_status, 'fail')
def test_client_side_ok(self):
t = StringTransport()
p = TestHandshakeProtocol()
now = time.time()
hs = Handshaker(p, now, is_client=True)
# can't initiate client handler before making connection
p.init_handler(hs.gen_handler(), do_init=False)
p.makeConnection(t)
# client side is the active one
self.assertEquals(t.value(), '')
# ... once initiated
p.init_handler()
# after that the handling is almost identical to the server side...
ver_pkt = struct.pack('B', self.protocol_version)
err = p.dataReceived(ver_pkt)
self.assertIdentical(err, None)
hs_rand_data = '.' * (self.handshake_length - 8)
timestamp = 42
hs_pkt = struct.pack('>LL', timestamp, 0) + hs_rand_data
err = p.dataReceived(hs_pkt)
self.assertIdentical(err, None)
self.assert_(len(t.value()) == 1 + self.handshake_length * 2,
'Response too short (%d)' % len(t.value()))
self.assertEquals(struct.unpack_from('B', t.value(), 0)[0],
self.protocol_version)
cli_hs_pkt = t.value()[1:1+self.handshake_length]
hs_pkt_echo = t.value()[1+self.handshake_length:
1+self.handshake_length*2]
self.assertEquals(struct.unpack_from('>L', hs_pkt_echo, 0)[0],
timestamp)
self.assertEquals(hs_pkt_echo[8:], hs_rand_data)
err = p.dataReceived(cli_hs_pkt)
self.assertIdentical(err, None)
self.assertFalse(t.disconnecting, 'disconnecting')
self.assertEquals(p.handshake_status, 'ok')
def test_data_per_chunk(self):
t = StringTransport()
p = TestDemuxerProtocol()
dmx = MessagePassingDemuxer(p)
p.init_handler(dmx.gen_handler())
p.makeConnection(t)
for i, (d, m) in enumerate(zip(data, messages)):
p.dataReceived(d)
rcvd = p.pop_messages()
if m:
fail_msg = '(not matching index: %d)' % i
self.assertEquals(len(rcvd), 1, fail_msg)
self.assertMatching(rcvd[0], m, fail_msg)
def _test_data_chopped(self, sizes):
t = StringTransport()
p = TestDemuxerProtocol()
dmx = MessagePassingDemuxer(p)
p.init_handler(dmx.gen_handler())
p.makeConnection(t)
# filter out Nones
expected = [m for m in messages if m]
for d in chopped(''.join(data), sizes):
p.dataReceived(d)
received = p.pop_messages()
self.assertEquals(len(received), len(expected))
for i, (r, e) in enumerate(zip(received, expected)):
self.assertMatching(r, e, '(not matching index: %d)' % i)
def test_complete_exchange_plus(self):
# almost exactly the same test as above except writing some
# additional (garbage) data immediately (as in the same
# "socket.read()") after the handshake data
tcli = StringTransport()
tsrv = StringTransport()
p_cli = TestHandshakeProtocol()
p_srv = TestHandshakeProtocol()
now = time.time()
hs_cli = Handshaker(p_cli, now - 0.001, is_client=True)
hs_srv = Handshaker(p_srv, now - 0.042)
p_srv.init_handler(hs_srv.gen_handler())
p_cli.init_handler(hs_cli.gen_handler(), do_init=False)
p_srv.makeConnection(tsrv)
self.assertEquals(tsrv.value(), '')
p_cli.makeConnection(tcli)
self.assertEquals(tcli.value(), '')
p_cli.init_handler()
# self.assertEquals(len(tcli.value()), 1 + 1536)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
# self.assertEquals(len(tsrv.value()), 1 + 1536 + 1536)
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, None)
err = p_cli.dataReceived(tsrv.value() + '\x00')
tsrv.clear()
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, 'ok')
self.assertEquals(p_srv.handshake_status, None)
err = p_srv.dataReceived(tcli.value() + '\x00')
tcli.clear()
self.assertIdentical(err, None)
self.assertFalse(tsrv.disconnecting, 'disconnecting')
self.assertFalse(tcli.disconnecting, 'disconnecting')
self.assertEquals(p_srv.handshake_status, 'ok')
def test_complete_exchange(self):
tcli = StringTransport()
tsrv = StringTransport()
p_cli = TestHandshakeProtocol()
p_srv = TestHandshakeProtocol()
now = time.time()
hs_cli = Handshaker(p_cli, now - 0.001, is_client=True)
hs_srv = Handshaker(p_srv, now - 0.042)
p_srv.init_handler(hs_srv.gen_handler())
p_cli.init_handler(hs_cli.gen_handler(), do_init=False)
p_srv.makeConnection(tsrv)
self.assertEquals(tsrv.value(), '')
p_cli.makeConnection(tcli)
self.assertEquals(tcli.value(), '')
p_cli.init_handler()
# self.assertEquals(len(tcli.value()), 1 + 1536)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
# self.assertEquals(len(tsrv.value()), 1 + 1536 + 1536)
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, None)
err = p_cli.dataReceived(tsrv.value())
tsrv.clear()
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, 'ok')
self.assertEquals(p_srv.handshake_status, None)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
self.assertIdentical(err, None)
self.assertFalse(tsrv.disconnecting, 'disconnecting')
self.assertFalse(tcli.disconnecting, 'disconnecting')
self.assertEquals(p_srv.handshake_status, 'ok')
def test_complete_exchange(self):
tcli = StringTransport()
tsrv = StringTransport()
p_cli = TestHandshakeProtocol()
p_srv = TestHandshakeProtocol()
now = time.time()
hs_cli = Handshaker(p_cli, now - 0.001, is_client=True)
hs_srv = Handshaker(p_srv, now - 0.042)
p_srv.init_handler(hs_srv.gen_handler())
p_cli.init_handler(hs_cli.gen_handler(), do_init=False)
p_srv.makeConnection(tsrv)
self.assertEquals(tsrv.value(), '')
p_cli.makeConnection(tcli)
self.assertEquals(tcli.value(), '')
p_cli.init_handler()
# self.assertEquals(len(tcli.value()), 1 + 1536)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
# self.assertEquals(len(tsrv.value()), 1 + 1536 + 1536)
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, None)
err = p_cli.dataReceived(tsrv.value())
tsrv.clear()
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, 'ok')
self.assertEquals(p_srv.handshake_status, None)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
self.assertIdentical(err, None)
self.assertFalse(tsrv.disconnecting, 'disconnecting')
self.assertFalse(tcli.disconnecting, 'disconnecting')
self.assertEquals(p_srv.handshake_status, 'ok')
def test_complete_exchange_plus(self):
# almost exactly the same test as above except writing some
# additional (garbage) data immediately (as in the same
# "socket.read()") after the handshake data
tcli = StringTransport()
tsrv = StringTransport()
p_cli = TestHandshakeProtocol()
p_srv = TestHandshakeProtocol()
now = time.time()
hs_cli = Handshaker(p_cli, now - 0.001, is_client=True)
hs_srv = Handshaker(p_srv, now - 0.042)
p_srv.init_handler(hs_srv.gen_handler())
p_cli.init_handler(hs_cli.gen_handler(), do_init=False)
p_srv.makeConnection(tsrv)
self.assertEquals(tsrv.value(), '')
p_cli.makeConnection(tcli)
self.assertEquals(tcli.value(), '')
p_cli.init_handler()
# self.assertEquals(len(tcli.value()), 1 + 1536)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
# self.assertEquals(len(tsrv.value()), 1 + 1536 + 1536)
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, None)
err = p_cli.dataReceived(tsrv.value() + '\x00')
tsrv.clear()
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, 'ok')
self.assertEquals(p_srv.handshake_status, None)
err = p_srv.dataReceived(tcli.value() + '\x00')
tcli.clear()
self.assertIdentical(err, None)
self.assertFalse(tsrv.disconnecting, 'disconnecting')
self.assertFalse(tcli.disconnecting, 'disconnecting')
self.assertEquals(p_srv.handshake_status, 'ok')
def _test_complete_exchange(self, client_handshaker_class,
client_failure=False, server_failure=False):
tcli = StringTransport()
tsrv = StringTransport()
p_cli = TestHandshakeProtocol()
p_srv = TestHandshakeProtocol()
now = time.time()
hs_cli = client_handshaker_class(p_cli, now - 0.001, is_client=True)
hs_srv = CryptoHandshaker(p_srv, now - 0.042)
p_srv.init_handler(hs_srv.gen_handler())
p_cli.init_handler(hs_cli.gen_handler(), do_init=False)
p_srv.makeConnection(tsrv)
self.assertEquals(tsrv.value(), '')
p_cli.makeConnection(tcli)
self.assertEquals(tcli.value(), '')
p_cli.init_handler()
# self.assertEquals(len(tcli.value()), 1 + 1536)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
# self.assertEquals(len(tsrv.value()), 1 + 1536 + 1536)
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, None)
err = p_cli.dataReceived(tsrv.value() + '\x00')
tsrv.clear()
if client_failure:
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(tcli.disconnecting, 'should not be disconnecting')
self.assertEquals(p_cli.handshake_status, 'fail')
self.assertEquals(p_srv.handshake_status, None)
else:
self.assertIdentical(err, None)
self.assertFalse(tcli.disconnecting, 'disconnecting')
self.assertEquals(p_cli.handshake_status, 'ok')
self.assertEquals(p_srv.handshake_status, None)
err = p_srv.dataReceived(tcli.value() + '\x00')
tcli.clear()
if server_failure:
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(tsrv.disconnecting, 'should not be disconnecting')
self.assertEquals(p_srv.handshake_status, 'fail')
else:
self.assertIdentical(err, None)
self.assertFalse(tsrv.disconnecting, 'disconnecting')
self.assertEquals(p_srv.handshake_status, 'ok')
def _test_complete_exchange(self,
client_handshaker_class,
client_failure=False,
server_failure=False):
tcli = StringTransport()
tsrv = StringTransport()
p_cli = TestHandshakeProtocol()
p_srv = TestHandshakeProtocol()
now = time.time()
hs_cli = client_handshaker_class(p_cli, now - 0.001, is_client=True)
hs_srv = CryptoHandshaker(p_srv, now - 0.042)
p_srv.init_handler(hs_srv.gen_handler())
p_cli.init_handler(hs_cli.gen_handler(), do_init=False)
p_srv.makeConnection(tsrv)
self.assertEquals(tsrv.value(), '')
p_cli.makeConnection(tcli)
self.assertEquals(tcli.value(), '')
p_cli.init_handler()
# self.assertEquals(len(tcli.value()), 1 + 1536)
err = p_srv.dataReceived(tcli.value())
tcli.clear()
# self.assertEquals(len(tsrv.value()), 1 + 1536 + 1536)
self.assertIdentical(err, None)
self.assertEquals(p_cli.handshake_status, None)
err = p_cli.dataReceived(tsrv.value() + '\x00')
tsrv.clear()
if client_failure:
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(tcli.disconnecting, 'should not be disconnecting')
self.assertEquals(p_cli.handshake_status, 'fail')
self.assertEquals(p_srv.handshake_status, None)
else:
self.assertIdentical(err, None)
self.assertFalse(tcli.disconnecting, 'disconnecting')
self.assertEquals(p_cli.handshake_status, 'ok')
self.assertEquals(p_srv.handshake_status, None)
err = p_srv.dataReceived(tcli.value() + '\x00')
tcli.clear()
if server_failure:
self.assertIsInstance(err, failure.Failure)
self.assertIsInstance(err.value, HandshakeFailedError)
self.assertFalse(tsrv.disconnecting, 'should not be disconnecting')
self.assertEquals(p_srv.handshake_status, 'fail')
else:
self.assertIdentical(err, None)
self.assertFalse(tsrv.disconnecting, 'disconnecting')
self.assertEquals(p_srv.handshake_status, 'ok')
