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[energy-scan-server] reject scan request with zero channel mask (#12137)

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This commit validates that the Channel Mask TLVs in a TMF Energy
Scan request are non-zero.

Additionally, this commit clamps the Count TLV value to the valid
range (1, 2, and 3) as required by the Thread specification.
The `test_otci` is updated to use count 3 (previously 4).

An Energy Scan request with a zero `Channel Mask` is invalid and
can cause the device to start a scan that takes a long time or
never completes. This change rejects such requests, preventing the
device from getting stuck. This was discovered by
fuzzer test.
This commit is contained in:
Abtin Keshavarzian
2025-11-12 09:21:29 +01:00
committed by GitHub
parent 372fe4fbf1
commit beeef5f8a6
3 changed files with 7 additions and 2 deletions
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tools/otci/tests/test_otci.py
+2 -2
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@@ -754,10 +754,10 @@ class TestOTCI(unittest.TestCase):
rtt: Dict[str, float] = cast(Dict[str, float], statistics['round_trip_time'])
self.assertTrue(rtt['min'] - 1e-9 <= rtt['avg'] <= rtt['max'] + 1e-9)
ed_report = commissioner.commissioner_energy_scan(3 << commissioner.get_channel(), 4, 32, 1000,
ed_report = commissioner.commissioner_energy_scan(3 << commissioner.get_channel(), 3, 32, 1000,
child1.get_ipaddr_rloc())
comm_chan = commissioner.get_channel()
self.assertEqual({comm_chan: [-30, -30, -30, -30], comm_chan + 1: [-30, -30, -30, -30]}, ed_report)
self.assertEqual({comm_chan: [-30, -30, -30], comm_chan + 1: [-30, -30, -30]}, ed_report)
commissioner.commissioner_announce(TEST_CHANNEL_MASK, 1, 32, child1.get_ipaddr_rloc())