Description
Brief description
I am using a MultipleTypeField to switch between a complex field (itself a MultipleTypeField) and a FieldListField of that field for array types. The definition works while dissecting, but it does not work when trying to build the packet unless that packet was constructed from bytes.
I tried doing some debugging to see if I could come up with a workaround, and I did notice something: during building, Packet.getfieldval returns the first element of the value array instead of the entire array as I would expect. This may mean that the outer MultipleTypeField is returning dflt when it's not supposed to, though strangely the inner MultipleTypeField is working correctly.
Scapy version
scapy-2.4.5rc1.dev293 (commit ba9fff2)
Python version
3.10.4
Operating system
Ubuntu 22.04 LTS on WSL2
Additional environment information
No response
How to reproduce
Gist with a script to reproduce the issue
Actual result
Traceback (most recent call last):
File "/<project>/scapybug.py", line 64, in <module>
test_pkt_arr_filled = DataPacket(raw(test_pkt_arr))
File "/<project>/venv/lib/python3.10/site-packages/scapy/compat.py", line 294, in raw
return bytes(x)
File "/<project>/venv/lib/python3.10/site-packages/scapy/packet.py", line 586, in __bytes__
return self.build()
File "/<project>/venv/lib/python3.10/site-packages/scapy/packet.py", line 727, in build
p = self.do_build()
File "/<project>/venv/lib/python3.10/site-packages/scapy/packet.py", line 707, in do_build
pkt = self.self_build()
File "/<project>/venv/lib/python3.10/site-packages/scapy/packet.py", line 686, in self_build
raise ex
File "/<project>/venv/lib/python3.10/site-packages/scapy/packet.py", line 677, in self_build
p = f.addfield(self, p, val)
File "/<project>/venv/lib/python3.10/site-packages/scapy/fields.py", line 537, in addfield
return fld.addfield(pkt, s, val)
File "/<project>/venv/lib/python3.10/site-packages/scapy/fields.py", line 2002, in addfield
for v in val:
TypeError: While dissecting field 'value': 'int' object is not iterable
Expected result
The program should not crash, and test_pkt_arr_filled == test_pkt_arr_raw should be True.
Related resources
No response