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Change ID field to use little-endian byte order #4629

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Change ID field to use little-endian byte order #4629

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cbd3535
Change ID field to use little-endian byte order
satveerbrar Jan 3, 2025
e4ec015
Add unit tests to verify encoding and decoding of Dot11 ID field
satveerbrar Jan 6, 2025
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2 changes: 1 addition & 1 deletion scapy/layers/dot11.py
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Original file line number Diff line number Diff line change
Expand Up @@ -730,7 +730,7 @@ class Dot11(Packet):
["next_tbtt", "comp_ssid", "ano"]),
lambda pkt: (pkt.type, pkt.subtype) == (3, 1)
),
ShortField("ID", 0),
LEShortField("ID", 0),
_Dot11MacField("addr1", ETHER_ANY, 1),
ConditionalField(
_Dot11MacField("addr2", ETHER_ANY, 2),
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9 changes: 9 additions & 0 deletions test/scapy/layers/dot11.uts
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Expand Up @@ -18,6 +18,11 @@ len(dpl_ether) == 1 and Ether in dpl_ether[0]
s = raw(Dot11())
s == b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'

pkt = Dot11(ID=0x1205)
raw_data = raw(pkt)
expected = b'\x05\x12'
assert raw_data[2:4] == b'\x05\x12', f"Encoded Dot11 ID field is {raw_data[2:4]}, expected {repr(expected)}."

= Dot11 - dissection
p = Dot11(s)
Dot11 in p and p.addr3 == "00:00:00:00:00:00"
Expand All @@ -26,6 +31,10 @@ assert "DA" in p.address_meaning(1)
assert "SA" in p.address_meaning(2)
assert "BSSID" in p.address_meaning(3)

pkt = b'\x00\x00\x05\x12\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
decoded_pkt = Dot11(pkt)
assert decoded_pkt.ID == 0x1205, f"Decoded Dot11 ID field is {hex(decoded_pkt.ID)}, expected 0x1205."

= Dot11QoS - build
s = raw(Dot11()/Dot11QoS(Ack_Policy=1))
assert s == b'\xc8\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00 \x00'
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