def test_not_able_to_send_aarq(
self, aarq: acse.ApplicationAssociationRequestApdu):
c = DlmsConnection.with_pre_established_association(
conformance=Conformance())
with pytest.raises(LocalDlmsProtocolError):
c.send(aarq)
def test_aarq_makes_dlms_waiting_for_aare():
s = state.DlmsConnectionState()
s.process_event(
acse.ApplicationAssociationRequestApdu(
user_information=UserInformation(
InitiateRequestApdu(proposed_conformance=Conformance())
)
)
)
assert s.current_state == state.AWAITING_ASSOCIATION_RESPONSE
def test_state_is_ready_in_init(self):
c = DlmsConnection.with_pre_established_association(
conformance=Conformance(
priority_management_supported=True,
attribute_0_supported_with_get=True,
block_transfer_with_action=True,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=True,
multiple_references=True,
get=True,
set=True,
selective_access=True,
event_notification=True,
action=True,
))
assert c.state.current_state == state.READY
def test_encode_no_ciphering_high_security(self):
data = b"`6\xa1\t\x06\x07`\x85t\x05\x08\x01\x01\x8a\x02\x07\x80\x8b\x07`\x85t\x05\x08\x02\x05\xac\n\x80\x08K56iVagY\xbe\x10\x04\x0e\x01\x00\x00\x00\x06_\x1f\x04\x00\x00~\x1f\x04\xb0"
aarq = ApplicationAssociationRequest(
system_title=None,
public_cert=None,
authentication=enumerations.AuthenticationMechanism.HLS_GMAC,
ciphered=False,
authentication_value=b"K56iVagY",
user_information=UserInformation(
content=InitiateRequest(
proposed_conformance=Conformance(
general_protection=False,
general_block_transfer=False,
delta_value_encoding=False,
attribute_0_supported_with_set=False,
priority_management_supported=True,
attribute_0_supported_with_get=True,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=True,
block_transfer_with_action=True,
multiple_references=True,
data_notification=False,
access=False,
get=True,
set=True,
selective_access=True,
event_notification=True,
action=True,
),
proposed_quality_of_service=0,
client_max_receive_pdu_size=1200,
proposed_dlms_version_number=6,
response_allowed=True,
dedicated_key=None,
)
),
calling_ae_invocation_identifier=None,
called_ap_title=None,
called_ae_qualifier=None,
called_ap_invocation_identifier=None,
called_ae_invocation_identifier=None,
calling_ap_invocation_identifier=None,
implementation_information=None,
)
assert aarq.to_bytes() == data
def test_no_ciher_hls_ok(self):
data = bytes.fromhex(
"6142A109060760857405080101A203020100A305A10302010E88020780890760857405080205AA0A8008503677524A323146BE10040E0800065F1F040000501F01F40007"
)
aare = acse.ApplicationAssociationResponse(
result=enumerations.AssociationResult.ACCEPTED,
result_source_diagnostics=enumerations.AcseServiceUserDiagnostics.AUTHENTICATION_REQUIRED,
ciphered=False,
authentication=enumerations.AuthenticationMechanism.HLS_GMAC,
public_cert=None,
system_title=None,
authentication_value=b"P6wRJ21F",
user_information=UserInformation(
content=InitiateResponse(
negotiated_conformance=Conformance(
general_protection=False,
general_block_transfer=False,
delta_value_encoding=False,
attribute_0_supported_with_set=False,
priority_management_supported=True,
attribute_0_supported_with_get=False,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=False,
block_transfer_with_action=False,
multiple_references=False,
data_notification=False,
access=False,
get=True,
set=True,
selective_access=True,
event_notification=True,
action=True,
),
server_max_receive_pdu_size=500,
negotiated_dlms_version_number=6,
negotiated_quality_of_service=0,
)
),
implementation_information=None,
responding_ap_invocation_id=None,
responding_ae_invocation_id=None,
)
assert aare.to_bytes() == data
def test_no_ciphering_no_security_app_context_name_wrong(self):
data = bytes.fromhex(
"6129A109060760857405080101A203020101A305A103020102BE10040E0800065F1F040000501F01F40007"
)
aare = acse.ApplicationAssociationResponse(
result=enumerations.AssociationResult.REJECTED_PERMANENT,
result_source_diagnostics=enumerations.AcseServiceUserDiagnostics.APPLICATION_CONTEXT_NAME_NOT_SUPPORTED,
ciphered=False,
authentication=None,
system_title=None,
public_cert=None,
authentication_value=None,
user_information=acse.UserInformation(
content=InitiateResponse(
negotiated_conformance=Conformance(
general_protection=False,
general_block_transfer=False,
delta_value_encoding=False,
attribute_0_supported_with_set=False,
priority_management_supported=True,
attribute_0_supported_with_get=False,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=False,
block_transfer_with_action=False,
multiple_references=False,
data_notification=False,
access=False,
get=True,
set=True,
selective_access=True,
event_notification=True,
action=True,
),
server_max_receive_pdu_size=500,
negotiated_dlms_version_number=6,
negotiated_quality_of_service=0,
)
),
implementation_information=None,
responding_ap_invocation_id=None,
responding_ae_invocation_id=None,
)
assert aare.to_bytes() == data
def aare():
from dlms_cosem import enumerations
from dlms_cosem.protocol import acse
from dlms_cosem.protocol.xdlms import Conformance, InitiateResponse
return acse.ApplicationAssociationResponse(
result=enumerations.AssociationResult.ACCEPTED,
result_source_diagnostics=enumerations.AcseServiceUserDiagnostics.NULL,
ciphered=False,
authentication=None,
system_title=None,
public_cert=None,
authentication_value=None,
user_information=acse.UserInformation(
content=InitiateResponse(
negotiated_conformance=Conformance(
general_protection=False,
general_block_transfer=False,
delta_value_encoding=False,
attribute_0_supported_with_set=False,
priority_management_supported=True,
attribute_0_supported_with_get=False,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=False,
block_transfer_with_action=False,
multiple_references=False,
data_notification=False,
access=False,
get=True,
set=True,
selective_access=True,
event_notification=True,
action=True,
),
server_max_receive_pdu_size=500,
negotiated_dlms_version_number=6,
negotiated_quality_of_service=0,
)
),
implementation_information=None,
responding_ap_invocation_id=None,
responding_ae_invocation_id=None,
)
def test_negotiated_conformance_is_updated():
c = DlmsConnection(client_system_title=b"12345678")
c.send(c.get_aarq())
c.receive_data(
acse.ApplicationAssociationResponseApdu(
result=enumerations.AssociationResult.ACCEPTED,
result_source_diagnostics=enumerations.AcseServiceUserDiagnostics.
NULL,
user_information=acse.UserInformation(
content=xdlms.InitiateResponseApdu(
negotiated_conformance=Conformance(
general_protection=True, general_block_transfer=True),
server_max_receive_pdu_size=500,
)),
).to_bytes())
c.next_event()
assert c.conformance.general_protection
assert c.conformance.general_block_transfer
assert c.max_pdu_size == 500
assert c.state.current_state == state.READY
def test_decode(self):
resulting_bytes = bytes.fromhex(
"601DA109060760857405080101BE10040E01000000065F1F0400001E1DFFFF"
)
aarq = ApplicationAssociationRequest(
ciphered=False,
system_title=None,
public_cert=None,
authentication=None,
authentication_value=None,
user_information=UserInformation(
content=InitiateRequest(
proposed_conformance=Conformance(
general_protection=False,
general_block_transfer=False,
delta_value_encoding=False,
attribute_0_supported_with_set=False,
priority_management_supported=False,
attribute_0_supported_with_get=False,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=True,
block_transfer_with_action=True,
multiple_references=True,
data_notification=False,
access=False,
get=True,
set=True,
selective_access=True,
event_notification=False,
action=True,
),
proposed_quality_of_service=0,
client_max_receive_pdu_size=65535,
proposed_dlms_version_number=6,
response_allowed=True,
dedicated_key=None,
)
),
)
assert aarq.to_bytes() == resulting_bytes
def test_no_cipher_no_auth_conformance(self):
data = bytes.fromhex(
"6129a109060760857405080101a203020100a305a103020100be10040e0800065f1f0400001e1d04c80007"
)
aare = acse.ApplicationAssociationResponse.from_bytes(data)
assert aare.result == enumerations.AssociationResult.ACCEPTED
assert (
aare.result_source_diagnostics
== enumerations.AcseServiceUserDiagnostics.NULL
)
assert not aare.ciphered
assert not aare.authentication
assert aare.system_title is None
assert aare.authentication_value is None
assert aare.public_cert is None
assert isinstance(aare.user_information.content, InitiateResponse)
assert aare.user_information.content.negotiated_conformance == Conformance(
general_protection=False,
general_block_transfer=False,
delta_value_encoding=False,
attribute_0_supported_with_set=False,
priority_management_supported=False,
attribute_0_supported_with_get=False,
block_transfer_with_get_or_read=True,
block_transfer_with_set_or_write=True,
block_transfer_with_action=True,
multiple_references=True,
data_notification=False,
access=False,
get=True,
set=True,
selective_access=True,
event_notification=False,
action=True,
)
def test_not_able_to_send_rlrq(self, rlrq: acse.ReleaseRequest):
c = DlmsConnection.with_pre_established_association(conformance=Conformance())
with pytest.raises(exceptions.PreEstablishedAssociationError):
c.send(rlrq)