LBRYCommunity/lbrycrd
1
0
Fork 0
Code Issues 29 Pull requests 1 Projects Releases 32 Packages Wiki Activity

Add comments to AttemptToEvictConnection

Browse source
This commit is contained in:
Patrick Strateman 2015-08-20 16:47:49 -07:00
parent a8f6e45249
commit df23937422
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
src/net.cpp
View file

@ -836,13 +836,20 @@ static bool AttemptToEvictConnection(bool fPreferNewConnection) {
}
// Protect connections with certain characteristics
// Deterministically select 4 peers to protect by netgroup.
// An attacker cannot predict which netgroups will be protected.
static CompareNetGroupKeyed comparerNetGroupKeyed;
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), comparerNetGroupKeyed);
vEvictionCandidates.erase(vEvictionCandidates.end() - std::min(4, static_cast<int>(vEvictionCandidates.size())), vEvictionCandidates.end());
// Protect the 8 nodes with the best ping times.
// An attacker cannot manipulate this metric without physically moving nodes closer to the target.
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), ReverseCompareNodeMinPingTime);
vEvictionCandidates.erase(vEvictionCandidates.end() - std::min(8, static_cast<int>(vEvictionCandidates.size())), vEvictionCandidates.end());
// Protect the 64 nodes which have been connected the longest.
// This replicates the existing implicit behavior.
std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), ReverseCompareNodeTimeConnected);
vEvictionCandidates.erase(vEvictionCandidates.end() - std::min(64, static_cast<int>(vEvictionCandidates.size())), vEvictionCandidates.end());