fix: rejecting excess relay connections #3065
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Description
Rejecting incoming Relay connections whenever we reached our
inconnections target.Currently, we accept connections and prune the excess connections periodically. However, this approach is not working out properly, as nodes can reconnect to us right after we disconnect to them, making no difference.
This makes the node vulnerable to attacks, as other nodes can fill all our connections without leaving libp2p connections to serve non-Relay nodes.
This PR addresses the issue, disconnecting from a Relay node right after receiving their request, in case we already reached our target.
The content of this PR was actually proposed by @Ivansete-status some weeks ago :) Thanks so much!
Changes
inRelayPeersTargetoutRelayPeersTargetIssue
closes #3063