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Fix 'ip_range_whitelist' not working for federation servers (#10115)

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Add 'federation_ip_range_whitelist'. This allows backwards-compatibility, If 'federation_ip_range_blacklist' is set. Otherwise 'ip_range_whitelist' will be used for federation servers.

Signed-off-by: Michael Kutzner 1mikure@gmail.com
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Michael Kutzner 2021-06-15 09:53:55 +02:00 committed by GitHub
parent 1dfdc87b9b
commit aac2c49b9b
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3 changed files with 19 additions and 13 deletions
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1
changelog.d/10115.bugfix Normal file
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@ -0,0 +1 @@
Fix a bug introduced in Synapse v1.25.0 that prevented the `ip_range_whitelist` configuration option from working for federation and identity servers. Contributed by @mikure.

27
synapse/config/server.py
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@ -397,19 +397,22 @@ class ServerConfig(Config):
self.ip_range_whitelist = generate_ip_set(
config.get("ip_range_whitelist", ()), config_path=("ip_range_whitelist",)
)
# The federation_ip_range_blacklist is used for backwards-compatibility
# and only applies to federation and identity servers. If it is not given,
# default to ip_range_blacklist.
federation_ip_range_blacklist = config.get(
"federation_ip_range_blacklist", ip_range_blacklist
)
# Always blacklist 0.0.0.0, ::
self.federation_ip_range_blacklist = generate_ip_set(
federation_ip_range_blacklist,
["0.0.0.0", "::"],
config_path=("federation_ip_range_blacklist",),
)
# and only applies to federation and identity servers.
if "federation_ip_range_blacklist" in config:
# Always blacklist 0.0.0.0, ::
self.federation_ip_range_blacklist = generate_ip_set(
config["federation_ip_range_blacklist"],
["0.0.0.0", "::"],
config_path=("federation_ip_range_blacklist",),
)
# 'federation_ip_range_whitelist' was never a supported configuration option.
self.federation_ip_range_whitelist = None
else:
# No backwards-compatiblity requrired, as federation_ip_range_blacklist
# is not given. Default to ip_range_blacklist and ip_range_whitelist.
self.federation_ip_range_blacklist = self.ip_range_blacklist
self.federation_ip_range_whitelist = self.ip_range_whitelist
# (undocumented) option for torturing the worker-mode replication a bit,
# for testing. The value defines the number of milliseconds to pause before

4
synapse/http/matrixfederationclient.py
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@ -318,7 +318,9 @@ class MatrixFederationHttpClient:
# We need to use a DNS resolver which filters out blacklisted IP
# addresses, to prevent DNS rebinding.
self.reactor = BlacklistingReactorWrapper(
hs.get_reactor(), None, hs.config.federation_ip_range_blacklist
hs.get_reactor(),
hs.config.federation_ip_range_whitelist,
hs.config.federation_ip_range_blacklist,
) # type: ISynapseReactor
user_agent = hs.version_string