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Exclude relay versions affected by #20499 from the fallback list

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Part of #20539, based on #20509.
This commit is contained in:
teor 2016-12-06 22:01:14 +11:00
parent 225c3d57db
commit 243d6fa0c7
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GPG Key ID: 450CBA7F968F094B
1 changed files with 60 additions and 5 deletions
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65
scripts/maint/updateFallbackDirs.py
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@ -501,6 +501,8 @@ class Candidate(object):
if (not 'effective_family' in details
or details['effective_family'] is None):
details['effective_family'] = []
if not 'platform' in details:
details['platform'] = None
details['last_changed_address_or_port'] = parse_ts(
details['last_changed_address_or_port'])
self._data = details
@ -515,6 +517,7 @@ class Candidate(object):
self._compute_ipv6addr()
if not self.has_ipv6():
logging.debug("Failed to get an ipv6 address for %s."%(self._fpr,))
self._compute_version()
def _stable_sort_or_addresses(self):
# replace self._data['or_addresses'] with a stable ordering,
@ -627,6 +630,59 @@ class Candidate(object):
self.ipv6orport = int(port)
return
def _compute_version(self):
# parse the version out of the platform string
# The platform looks like: "Tor 0.2.7.6 on Linux"
self._data['version'] = None
if self._data['platform'] is None:
return
# be tolerant of weird whitespacing, use a whitespace split
tokens = self._data['platform'].split()
for token in tokens:
vnums = token.split('.')
# if it's at least a.b.c.d, with potentially an -alpha-dev, -alpha, -rc
if (len(vnums) >= 4 and vnums[0].isdigit() and vnums[1].isdigit() and
vnums[2].isdigit()):
self._data['version'] = token
return
# From #20509
# bug #20499 affects versions from 0.2.9.1-alpha-dev to 0.2.9.4-alpha-dev
# and version 0.3.0.0-alpha-dev
# Exhaustive lists are hard to get wrong
STALE_CONSENSUS_VERSIONS = ['0.2.9.1-alpha-dev',
'0.2.9.2-alpha',
'0.2.9.2-alpha-dev',
'0.2.9.3-alpha',
'0.2.9.3-alpha-dev',
'0.2.9.4-alpha',
'0.2.9.4-alpha-dev',
'0.3.0.0-alpha-dev'
]
def is_valid_version(self):
# call _compute_version before calling this
# is the version of the relay a version we want as a fallback?
# checks both recommended versions and bug #20499 / #20509
#
# if the relay doesn't have a recommended version field, exclude the relay
if not self._data.has_key('recommended_version'):
logging.info('%s not a candidate: no recommended_version field',
self._fpr)
return False
if not self._data['recommended_version']:
logging.info('%s not a candidate: version not recommended', self._fpr)
return False
# if the relay doesn't have version field, exclude the relay
if not self._data.has_key('version'):
logging.info('%s not a candidate: no version field', self._fpr)
return False
if self._data['version'] in Candidate.STALE_CONSENSUS_VERSIONS:
logging.warning('%s not a candidate: version delivers stale consensuses',
self._fpr)
return False
return True
@staticmethod
def _extract_generic_history(history, which='unknown'):
# given a tree like this:
@ -794,10 +850,8 @@ class Candidate(object):
logging.info('%s not a candidate: badexit avg too high (%lf)',
self._fpr, self._badexit)
return False
# if the relay doesn't report a version, also exclude the relay
if (not self._data.has_key('recommended_version')
or not self._data['recommended_version']):
logging.info('%s not a candidate: version not recommended', self._fpr)
# this function logs a message depending on which check fails
if not self.is_valid_version():
return False
if self._guard < CUTOFF_GUARD:
logging.info('%s not a candidate: guard avg too low (%lf)',
@ -1264,7 +1318,8 @@ class CandidateList(dict):
d = fetch('details',
fields=('fingerprint,nickname,contact,last_changed_address_or_port,' +
'consensus_weight,advertised_bandwidth,or_addresses,' +
'dir_address,recommended_version,flags,effective_family'))
'dir_address,recommended_version,flags,effective_family,' +
'platform'))
logging.debug('Loading details document done.')
if not 'relays' in d: raise Exception("No relays found in document.")