Do not absolutely protect local peers; decide group ties based on time. #7438
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With automatic tor HS support in place we should probably not be providing absolute protection for local peers, since HS inbound could be used to attack pretty easily. Instead, this counts on the latency metric inside AttemptToEvictConnection to privilege actually local peers.
This corrects a bug the case of tying group size where the code may fail to select the group with the newest member. Since newest time is the final selection criteria, failing to break ties on it on the step before can undermine the final selection. Tied netgroups are very common.
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What is HS? |
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Hidden service. |
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utACK 8e09f91, thanks for doing this on such short notice |
zkbot
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Mar 26, 2017
Tor ephemeral hidden services Cherry-picked from the following upstream PRs: - bitcoin/bitcoin#6503 (included to reduce merge conflicts) - bitcoin/bitcoin#6639 - bitcoin/bitcoin#6643 - bitcoin/bitcoin#7090 - bitcoin/bitcoin#7035 - bitcoin/bitcoin#7170 - bitcoin/bitcoin#7218 (non-QT part) - bitcoin/bitcoin#7313 - bitcoin/bitcoin#7438 - bitcoin/bitcoin#7553 - bitcoin/bitcoin#7637 - bitcoin/bitcoin#7683 - bitcoin/bitcoin#7813 - bitcoin/bitcoin#7703 - bitcoin/bitcoin#8203 - bitcoin/bitcoin#9004 - bitcoin/bitcoin#9234 - bitcoin/bitcoin#9911 (partial) Closes #2061.
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[This is the first patch of #7082 broken out targeting 0.12]
With automatic tor HS support in place we should probably not be providing
absolute protection for local peers, since HS inbound could be used to
attack pretty easily. Instead, this counts on the latency metric inside
AttemptToEvictConnection to privilege actually local peers.
This also corrects a bug the case of tying group size where the code may
fail to select the group with the newest member. Since newest time
is the final selection criteria, failing to break ties on it
on the step before can undermine the final selection.
Tied netgroups are very common.