def test_respond_to_echo_request(self):
"""
L2CAP/COS/ECH/BV-01-C [Respond to Echo Request]
Verify that the IUT responds to an echo request.
"""
self._setup_link_from_cert()
asserts.skip("is echo without a channel supported?")
echo_request = l2cap_packets.EchoRequestBuilder(
100, l2cap_packets.DisconnectionRequestBuilder(1, 2, 3))
echo_request_l2cap = l2cap_packets.BasicFrameBuilder(1, echo_request)
self.cert_send_b_frame(echo_request_l2cap)
assertThat(self.cert_channel).emits(
L2capMatchers.PartialData(b"\x06\x01\x04\x00\x02\x00\x03\x00"))
def test_l2cap_config_options(self):
mtu_opt = l2cap_packets.MtuConfigurationOption()
mtu_opt.mtu = 123
fcs_opt = l2cap_packets.FrameCheckSequenceOption()
fcs_opt.fcs_type = l2cap_packets.FcsType.DEFAULT
request = l2cap_packets.ConfigurationRequestBuilder(
0x1d, # Command ID
0xc1d, # Channel ID
l2cap_packets.Continuation.END,
[mtu_opt, fcs_opt])
request_b_frame = l2cap_packets.BasicFrameBuilder(0x01, request)
handle = 123
wrapped = hci_packets.AclPacketBuilder(
handle,
hci_packets.PacketBoundaryFlag.FIRST_NON_AUTOMATICALLY_FLUSHABLE,
hci_packets.BroadcastFlag.POINT_TO_POINT, request_b_frame)
# Size is ACL (4) + L2CAP (4) + Configure (8) + MTU (4) + FCS (3)
asserts.assert_true(
len(wrapped.Serialize()) == 23, "Packet serialized incorrectly")
def test_respond_configuration_request_ertm(self):
"""
L2CAP/CMC/BV-02-C [Lower Tester Initiated Configuration of Enhanced Retransmission Mode]
Verify the IUT can accept a Configuration Request from the Lower Tester containing an F&EC option
that specifies Enhanced Retransmission Mode.
"""
self._setup_link_from_cert()
psm = 1
scid = 0x0101
self.retransmission_mode = l2cap_facade_pb2.RetransmissionFlowControlMode.ERTM
self.dut.l2cap.SetDynamicChannel(
l2cap_facade_pb2.SetEnableDynamicChannelRequest(
psm=psm, retransmission_mode=self.retransmission_mode))
open_channel = l2cap_packets.ConnectionRequestBuilder(1, psm, scid)
open_channel_l2cap = l2cap_packets.BasicFrameBuilder(1, open_channel)
self.cert_send_b_frame(open_channel_l2cap)
# TODO: Verify that the type should be ERTM
assertThat(self.cert_l2cap.get_control_channel()).emits(
L2capMatchers.ConfigurationResponse())
def send(self, packet):
frame = l2cap_packets.BasicFrameBuilder(self._dcid, packet)
self._acl.send(frame.Serialize())
self._credits_left -= 1
