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Only count active fallbacks in updateFallbackDirs.py

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Previously, we would cut the list down to 100 fallbacks,
then check if they could serve a consensus, and comment
them out if they couldn't.
This would leave us with fewer than 100 active fallbacks.

Now, we stop when there are 100 active fallbacks.

Also count fallbacks with identical contact info.
Also fix minor logging issues.
This commit is contained in:
teor (Tim Wilson-Brown) 2016-04-07 12:55:39 +10:00
parent 205a641e1d
commit e115523c98
1 changed files with 81 additions and 66 deletions
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147
scripts/maint/updateFallbackDirs.py
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@ -26,6 +26,7 @@ import hashlib
import dateutil.parser
# bson_lazy provides bson
#from bson import json_util
import copy
from stem.descriptor.remote import DescriptorDownloader
@ -52,6 +53,11 @@ PERFORM_IPV4_DIRPORT_CHECKS = False if OUTPUT_CANDIDATES else True
# Don't check ~1000 candidates when OUTPUT_CANDIDATES is True
PERFORM_IPV6_DIRPORT_CHECKS = False if OUTPUT_CANDIDATES else False
# Output matching ContactInfo in fallbacks list or the blacklist?
# Useful if you're trying to contact operators
CONTACT_COUNT = True if OUTPUT_CANDIDATES else False
CONTACT_BLACKLIST_COUNT = True if OUTPUT_CANDIDATES else False
## OnionOO Settings
ONIONOO = 'https://onionoo.torproject.org/'
@ -123,8 +129,9 @@ CONSENSUS_DOWNLOAD_RETRY = True
_FB_POG = 0.2
FALLBACK_PROPORTION_OF_GUARDS = None if OUTPUT_CANDIDATES else _FB_POG
# We want exactly 100 fallbacks for the initial release
# Limit the number of fallbacks (eliminating lowest by weight)
MAX_FALLBACK_COUNT = None if OUTPUT_CANDIDATES else 500
MAX_FALLBACK_COUNT = None if OUTPUT_CANDIDATES else 100
# Emit a C #error if the number of fallbacks is below
MIN_FALLBACK_COUNT = 100
@ -958,11 +965,12 @@ class Candidate(object):
CONSENSUS_DOWNLOAD_SPEED_MAX)
return ((not ipv4_failed) and (not ipv6_failed))
def fallbackdir_line(self, dl_speed_ok):
def fallbackdir_line(self, dl_speed_ok, fallbacks, prefilter_fallbacks):
# /*
# nickname
# flags
# [contact]
# [identical contact counts]
# */
# "address:dirport orport=port id=fingerprint"
# "[ipv6=addr:orport]"
@ -978,6 +986,22 @@ class Candidate(object):
s += '\n'
if self._data['contact'] is not None:
s += cleanse_c_multiline_comment(self._data['contact'])
if CONTACT_COUNT or CONTACT_BLACKLIST_COUNT:
fallback_count = len([f for f in fallbacks
if f._data['contact'] == self._data['contact']])
if fallback_count > 1:
s += '\n'
s += '%d identical contacts listed' % (fallback_count)
if CONTACT_BLACKLIST_COUNT:
prefilter_count = len([f for f in prefilter_fallbacks
if f._data['contact'] == self._data['contact']])
filter_count = prefilter_count - fallback_count
if filter_count > 0:
if fallback_count > 1:
s += ' '
else:
s += '\n'
s += '%d blacklisted' % (filter_count)
s += '\n'
s += '*/'
s += '\n'
@ -1170,13 +1194,6 @@ class CandidateList(dict):
return '/* Whitelist & blacklist excluded %d of %d candidates. */'%(
excluded_count, initial_count)
# Remove any fallbacks in excess of MAX_FALLBACK_COUNT,
# starting with the lowest-weighted fallbacks
# this changes total weight
def exclude_excess_fallbacks(self):
if MAX_FALLBACK_COUNT is not None:
self.fallbacks = self.fallbacks[:MAX_FALLBACK_COUNT]
def fallback_min_weight(self):
if len(self.fallbacks) > 0:
return self.fallbacks[-1]
@ -1192,63 +1209,55 @@ class CandidateList(dict):
def summarise_fallbacks(self, eligible_count, guard_count, target_count,
max_count):
# Report:
# the number of fallback directories (with min & max limits);
# #error if below minimum count
# whether we checked consensus download times
# the number of fallback directories (and limits/exclusions, if relevant)
# min & max fallback weights
# Multiline C comment with #error if things go bad
s = '/*'
s += '\n'
s += 'Fallback Directory Summary'
s += '\n'
# Integers don't need escaping in C comments
fallback_count = len(self.fallbacks)
if FALLBACK_PROPORTION_OF_GUARDS is None:
fallback_proportion = ' (none)'
else:
fallback_proportion = '%d (%d * %f)'%(target_count, guard_count,
FALLBACK_PROPORTION_OF_GUARDS)
s += 'Final Count: %d (Eligible %d, Target %d%s'%(
min(max_count, fallback_count),
eligible_count,
fallback_count,
fallback_proportion)
if MAX_FALLBACK_COUNT is not None:
s += ', Clamped to %d'%(MAX_FALLBACK_COUNT)
s += ')\n'
if fallback_count < MIN_FALLBACK_COUNT:
s += '*/'
s += '\n'
# We must have a minimum number of fallbacks so they are always
# reachable, and are in diverse locations
s += '#error Fallback Count %d is too low. '%(fallback_count)
s += 'Must be at least %d for diversity. '%(MIN_FALLBACK_COUNT)
s += 'Try adding entries to the whitelist, '
s += 'or setting INCLUDE_UNLISTED_ENTRIES = True.'
s += '\n'
s += '/*'
s += '\n'
min_fb = self.fallback_min_weight()
min_weight = min_fb._data['consensus_weight']
max_fb = self.fallback_max_weight()
max_weight = max_fb._data['consensus_weight']
s += 'Max Weight: %d'%(max_weight)
s += '\n'
s += 'Min Weight: %d'%(min_weight)
s += '\n'
if eligible_count != fallback_count:
s += 'Excluded: %d (Eligible Count Exceeded Target Count)'%(
eligible_count - fallback_count)
s += '\n'
s += '*/'
# #error if below minimum count
if PERFORM_IPV4_DIRPORT_CHECKS or PERFORM_IPV6_DIRPORT_CHECKS:
s += '/* Checked %s%s%s DirPorts served a consensus within %.1fs. */'%(
s = '/* Checked %s%s%s DirPorts served a consensus within %.1fs. */'%(
'IPv4' if PERFORM_IPV4_DIRPORT_CHECKS else '',
' and ' if (PERFORM_IPV4_DIRPORT_CHECKS
and PERFORM_IPV6_DIRPORT_CHECKS) else '',
'IPv6' if PERFORM_IPV6_DIRPORT_CHECKS else '',
CONSENSUS_DOWNLOAD_SPEED_MAX)
else:
s += '/* Did not check IPv4 or IPv6 DirPort consensus downloads. */'
s = '/* Did not check IPv4 or IPv6 DirPort consensus downloads. */'
s += '\n'
# Multiline C comment with #error if things go bad
s += '/*'
s += '\n'
# Integers don't need escaping in C comments
fallback_count = len(self.fallbacks)
if FALLBACK_PROPORTION_OF_GUARDS is None:
fallback_proportion = ''
else:
fallback_proportion = ', Target %d (%d * %f)'%(target_count, guard_count,
FALLBACK_PROPORTION_OF_GUARDS)
s += 'Final Count: %d (Eligible %d%s'%(fallback_count,
eligible_count,
fallback_proportion)
if MAX_FALLBACK_COUNT is not None:
s += ', Clamped to %d'%(MAX_FALLBACK_COUNT)
s += ')\n'
if eligible_count != fallback_count:
s += 'Excluded: %d (Eligible Count Exceeded Target Count)'%(
eligible_count - fallback_count)
s += '\n'
min_fb = self.fallback_min_weight()
min_weight = min_fb._data['consensus_weight']
max_fb = self.fallback_max_weight()
max_weight = max_fb._data['consensus_weight']
s += 'Consensus Weight Range: %d - %d'%(min_weight, max_weight)
s += '\n'
s += '*/'
if fallback_count < MIN_FALLBACK_COUNT:
# We must have a minimum number of fallbacks so they are always
# reachable, and are in diverse locations
s += '\n'
s += '#error Fallback Count %d is too low. '%(fallback_count)
s += 'Must be at least %d for diversity. '%(MIN_FALLBACK_COUNT)
s += 'Try adding entries to the whitelist, '
s += 'or setting INCLUDE_UNLISTED_ENTRIES = True.'
return s
## Main Function
@ -1271,11 +1280,12 @@ def list_fallbacks():
# - the target fallback count (FALLBACK_PROPORTION_OF_GUARDS * guard count)
# - the maximum fallback count (MAX_FALLBACK_COUNT)
if MAX_FALLBACK_COUNT is None:
max_count = guard_count
max_count = target_count
else:
max_count = min(target_count, MAX_FALLBACK_COUNT)
candidates.compute_fallbacks()
prefilter_fallbacks = copy.copy(candidates.fallbacks)
# filter with the whitelist and blacklist
initial_count = len(candidates.fallbacks)
@ -1286,9 +1296,8 @@ def list_fallbacks():
# print the raw fallback list
#for x in candidates.fallbacks:
# print x.fallbackdir_line(True)
# exclude low-weight fallbacks if we have more than we want
candidates.exclude_excess_fallbacks()
# print json.dumps(candidates[x]._data, sort_keys=True, indent=4,
# separators=(',', ': '), default=json_util.default)
if len(candidates.fallbacks) > 0:
print candidates.summarise_fallbacks(eligible_count, guard_count,
@ -1299,11 +1308,17 @@ def list_fallbacks():
for s in fetch_source_list():
print describe_fetch_source(s)
for x in candidates.fallbacks[:max_count]:
active_count = 0
for x in candidates.fallbacks:
dl_speed_ok = x.fallback_consensus_dl_check()
print x.fallbackdir_line(dl_speed_ok)
#print json.dumps(candidates[x]._data, sort_keys=True, indent=4,
# separators=(',', ': '), default=json_util.default)
print x.fallbackdir_line(dl_speed_ok, candidates.fallbacks,
prefilter_fallbacks)
if dl_speed_ok:
# this fallback is included in the list
active_count += 1
if active_count >= max_count:
# we have enough fallbacks
break
if __name__ == "__main__":
list_fallbacks()