Decaying tags: added the capability to explicitly Remove() a decaying tag from a peer, and to Close(), stop tracking and clear a decaying tag for all peers.
v0.5.5
Highlights
📉 Decaying tags in the Connection Manager
This release introduces Decaying Tags in the Connection Manager interfaces. A decaying tag is one whose value automatically decays over time.
The actual application of the decay behaviour is encapsulated in a user-provided decaying function (DecayFn). The function is called on every tick (determined by the tag's Interval property), and returns either the new value of the tag, or whether it should be erased altogether.
We do not set values directly on a decaying tag. Rather, we "bump" decaying tags by a delta. Doing so calls the BumpFn with the old value and the delta, to determine the new value.
Such a pluggable design affords a great deal of flexibility and versatility. Behaviours that are straightforward to implement include:
Decay a tag by -1, or by half its current value, on every tick.
Every time a value is bumped, sum it to its current value.
Exponentially boost a score with every bump.
Sum the incoming score, but keep it within min, max bounds.
To use Decaying Tags, check if the Connection Manager supports them first via the SupportsDecay function.
This release adds interfaces for Connection Gating: middleware components that intercept connections at different stages and decide whether to ALLOW or BLOCK the connection. In contrast to Connection Managers, Connection Gaters are actively consulted throughout the dial/listen pipeline.
Connection Gaters can intercept connections at these stages:
InterceptPeerDial is called on an imminent outbound peer dial request, prior to the addresses of that peer being available/resolved. Blocking connections at this stage is typical for blacklisting scenarios.
InterceptAddrDial is called on an imminent outbound dial to a peer on a particular address. Blocking connections at this stage is typical for address filtering.
InterceptAccept is called as soon as a transport listener receives an inbound connection request, before any upgrade takes place. Transports who accept already secure and/or multiplexed connections (e.g. possibly QUIC) MUST call this method regardless, for correctness/consistency.
InterceptSecured is called for both inbound and outbound connections, after a security handshake has taken place and we've authenticated the peer.
InterceptUpgraded is called for inbound and outbound connections, after libp2p has finished upgrading the connection entirely to a secure, multiplexed channel.
Minor changes
Added a FirstSupportedProtocol API to the Protobook interface which returns the first protocol a peer supports from among the given interfaces.
... (truncated)
Commits
acf0d3d build(deps): bump github.com/multiformats/go-multiaddr from 0.2.1 to 0.2.2 (#...
a1c90aa decaying tags: support removal and closure. (#151)
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Bumps github.com/libp2p/go-libp2p-core from 0.3.0 to 0.5.6.
Release notes
Sourced from github.com/libp2p/go-libp2p-core's releases.
Commits
acf0d3dbuild(deps): bump github.com/multiformats/go-multiaddr from 0.2.1 to 0.2.2 (#...a1c90aadecaying tags: support removal and closure. (#151)e74305cminor godoc fixes.65c8515minor godoc fixes.9d35da1implement Stringer for network.{Direction,Connectedness,Reachability}. (#150)e3a456bbuild(deps): bump github.com/libp2p/go-openssl from 0.0.4 to 0.0.5 (#149)e5edab1connmgr: introduce abstractions and functions for decaying tags. (#104)1c39960Merge pull request #148 from libp2p/feat/supports-alloc909c774add connection gating interfaces and types. (#139)dabf5bbchanges as per reviewDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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