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Reject large transactions on federation (#4513)
* Reject large transactions on federation * Add changelog * lint * Simplify large transaction handling
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changelog.d/4513.misc
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changelog.d/4513.misc
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Reject federation transactions if they include more than 50 PDUs or 100 EDUs.
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@ -148,6 +148,22 @@ class FederationServer(FederationBase):
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logger.debug("[%s] Transaction is new", transaction.transaction_id)
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# Reject if PDU count > 50 and EDU count > 100
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if (len(transaction.pdus) > 50
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or (hasattr(transaction, "edus") and len(transaction.edus) > 100)):
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logger.info(
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"Transaction PDU or EDU count too large. Returning 400",
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)
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response = {}
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yield self.transaction_actions.set_response(
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origin,
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transaction,
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400, response
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)
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defer.returnValue((400, response))
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received_pdus_counter.inc(len(transaction.pdus))
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origin_host, _ = parse_server_name(origin)
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