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Correct proxyDHCP buffer use

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It was possible for proxyDHCP to look past the network designated end of packet.
Fix this by consistently using the memoryview that was trimmed to size.
This commit is contained in:
Jarrod Johnson
2024-06-25 16:25:19 -04:00
parent 162e4d1d1e
commit 762a8ee73f
1 changed files with 3 additions and 3 deletions
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6
confluent_server/confluent/discovery/protocols/pxe.py
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@ -315,9 +315,9 @@ def proxydhcp(handler, nodeguess):
optidx = rqv.tobytes().index(b'\x63\x82\x53\x63') + 4
except ValueError:
continue
hwlen = rq[2]
opts, disco = opts_to_dict(rq, optidx, 3)
disco['hwaddr'] = ':'.join(['{0:02x}'.format(x) for x in rq[28:28+hwlen]])
hwlen = rqv[2]
opts, disco = opts_to_dict(rqv, optidx, 3)
disco['hwaddr'] = ':'.join(['{0:02x}'.format(x) for x in rqv[28:28+hwlen]])
node = None
if disco.get('hwaddr', None) in macmap:
node = macmap[disco['hwaddr']]