Protect desirable or disadvantaged inbound peers from eviction by ratio.

Synopsis

Declared in <node/eviction.h>

void
ProtectEvictionCandidatesByRatio(std::vector<NodeEvictionCandidate>& vEvictionCandidates);

Description

This function protects half of the peers which have been connected the longest, to replicate the non‐eviction implicit behavior and preclude attacks that start later.

Half of these protected spots (1/4 of the total) are reserved for the following categories of peers, sorted by longest uptime, even if they're not longest uptime overall:

  • onion peers connected via our tor control service

  • localhost peers, as manually configured hidden services not using ‐bind=addr[:port]=onion will not be detected as inbound onion connections

  • I2P peers

  • CJDNS peers

This helps protect these privacy network peers, which tend to be otherwise disadvantaged under our eviction criteria for their higher min ping times relative to IPv4/IPv6 peers, and favorise the diversity of peer connections.

Parameters

Name

Description

vEvictionCandidates

The eviction candidates to filter; protected peers are removed in place.

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