pycrate-org
OER decoding error
Hi, ==== The follows are my source code. ==== import time from tci import TCI_Dispatcher, TCI_wsm, TCI_16093_DSRC asn1_initialize = TCI_Dispatcher.TCIMsg
message = { 'version': 3, 'time': int(time.time()), 'frame': ( 'sutCtrl', ( 'request', { 'messageId': 1, 'value': (('TCI-wsm', 'SetInitialState'), True) } ) ) }
asn1_initialize.set_val(message) print(asn1_initialize.to_asn1()) print(asn1_initialize.to_oer().hex())
asn1_initialize.from_oer(asn1_initialize.to_oer())
==== The follows are the result. ====
➜ tools git:(master) ✗ python3 ex_initialize_gen.py
{
version 3 -- currentVersion --,
time 1742110176,
frame sutCtrl : request : {
messageId 1,
value TCI-wsm.SetInitialState: TRUE
}
}
00030000000067d67de08680000101ff
Traceback (most recent call last):
File "ex_initialize_gen.py", line 28, in
pycrate_asn1rt.err.ASN1ObjErr: Type: BOOLEAN value out of constraint, None
I tried ber and uper, and they work. So not sure what happened on OER decoding? I didn't put the auto-generated code 'tci.asn'. The file size is large and may not be the root cause.
Sincerely, Kang
Let me reformat this content again. The follows are my source code.
import time
from tci import TCI_Dispatcher, TCI_wsm, TCI_16093_DSRC
asn1_initialize = TCI_Dispatcher.TCIMsg
#print(asn1_initialize.get_proto())
#message = {'version': 3, 'time': 1742107319736, 'frame': ('sutCtrl', ('request', {'messageId': 12, 'value': ('SetHeading', 1)}))}
message = {
'version': 3,
'time': int(time.time()),
'frame': (
'sutCtrl',
(
'request',
{
'messageId': 1,
'value': (('TCI-wsm', 'SetInitialState'), True)
}
)
)
}
#
asn1_initialize.set_val(message)
print(asn1_initialize.to_asn1())
print(asn1_initialize.to_oer().hex())
asn1_initialize.from_oer(asn1_initialize.to_oer())
The follows are the result.
➜ tools git:(master) ✗ python3 ex_initialize_gen.py
{
version 3 -- currentVersion --,
time 1742110176,
frame sutCtrl : request : {
messageId 1,
value TCI-wsm.SetInitialState: TRUE
}
}
00030000000067d67de08680000101ff
Traceback (most recent call last):
File "ex_initialize_gen.py", line 28, in <module>
asn1_initialize.from_oer(asn1_initialize.to_oer())
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj.py", line 2058, in from_oer
self._from_oer(char)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj_construct.py", line 1623, in _from_oer
Comp._from_oer(char)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj_construct.py", line 670, in _from_oer
Cho.from_oer(char)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj.py", line 2058, in from_oer
self._from_oer(char)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj_construct.py", line 670, in _from_oer
Cho.from_oer(char)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj.py", line 2061, in from_oer
self._safechk_bnd(self._val)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj_construct.py", line 774, in _safechk_bnd
Obj._safechk_bnd(Obj._val)
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj_ext.py", line 186, in _safechk_bnd
self._get_val_obj(val[0])._safechk_bnd(val[1])
File "/home/ttt12345/.local/lib/python3.8/site-packages/pycrate_asn1rt/asnobj.py", line 340, in _safechk_bnd
raise(ASN1ObjErr('{0}: {1} value out of constraint, {2!r}'\
pycrate_asn1rt.err.ASN1ObjErr: Type: BOOLEAN value out of constraint, None
I tried ber and uper codec, and they work. So not sure what happened on OER decoding? I didn't put the auto-generated code 'tci.asn'. The file size is large and may not be the root cause.
i tried other cobinations. It seems the root cuase is OER decoding (encoding OK) can't handle open type correctly.
Sincerely, Kang
Can you please indicate where the object TCI_Dispatcher.TCIMsg comes from? I don't think the module tci comes from pycrate. This is needed for me to reproduce the issue. Thx
Hi, I attached the auto-generated code. But I guess the following code of asnobj_ext.py in your project has some issue. val should be alwayws None because Obj never return anything.
def _from_oer(self, char):
# try to get a defined object from a table constraint
if self._TAB_LUT and self._const_tab and self._const_tab_at:
const_obj_type, const_obj = self._get_tab_obj()
if const_obj_type == CLASET_NONE:
if not self._SILENT:
asnlog('OPEN._from_oer: %s, unable to retrieve a table-looked up object' \
% (self.fullname()))
Obj = None
elif const_obj_type == CLASET_UNIQ:
Obj = const_obj
else:
# const_obj_type == CLASET_MULT
# with PER, no tag to select a given object
Obj = const_obj[0]
else:
# TODO: another way to provide a (set of) potential defined object(s)
# is to look into value constraint self._const_val
# if we have multiple, then we would have to bruteforce the decoding
# until a correct one is found !!!
Obj = None
#
val_bytes = ASN1CodecOER.decode_open_type(char)
# Kang; from_oer never return val
val = Obj.from_oer(val_bytes) if (Obj is not None) else val_bytes
OK, thanks for spotting this issue. Would you have a suggestion for a fix?
I implemented a fix: https://github.com/pycrate-org/pycrate/commit/91b7713c7a53a9b3c1ee2cf58dc5fc79a066a205. Can you pull it and have a look to ensure your issue is adressed @ttt710516 ?