[0.13 backport] Added feeler connections increasing good addrs in the tried table. #8643

1. 
   jonasschnelli commented at 7:50 PM on September 1, 2016: contributor

   Tests if addresses are online or offline by briefly connecting to them. These short lived connections are referred to as feeler connections. Feeler connections are designed to increase the number of fresh online addresses in tried by selecting and connecting to addresses in new. One feeler connection is attempted on average once every two minutes.

   This change was suggested as Countermeasure 4 in Eclipse Attacks on Bitcoin’s Peer-to-Peer Network, Ethan Heilman, Alison Kendler, Aviv Zohar, Sharon Goldberg. ePrint Archive Report 2015/263. March 2015.

   Backport for 0.13 from #8282

2. Added feeler connections increasing good addrs in the tried table.

   Tests if addresses are online or offline by briefly connecting to them. These short lived connections are referred to as feeler connections. Feeler connections are designed to increase the number of fresh online addresses in tried by selecting and connecting to addresses in new. One feeler connection is attempted on average once every two minutes.
   
   This change was suggested as Countermeasure 4 in
   Eclipse Attacks on Bitcoin’s Peer-to-Peer Network, Ethan Heilman,
   Alison Kendler, Aviv Zohar, Sharon Goldberg. ePrint Archive Report
   2015/263. March 2015.

   e8a7df8d43
3. jonasschnelli added the label P2P on Sep 1, 2016
4. 
   jonasschnelli commented at 7:51 PM on September 1, 2016: contributor

   Applies without changes, opened this PR to not forget about it.

   0.12 BP – in case we want to do this – would be here: https://github.com/bitcoin/bitcoin/compare/0.12...jonasschnelli:2016/08/feeler_012?expand=1 (needed some merge-care).

5. 
   gmaxwell commented at 10:34 PM on September 1, 2016: contributor

   ACK.

6. 
   sipa commented at 11:47 AM on September 5, 2016: member

   utACK e8a7df8d43f63729daba02fa029a509640b796ba. Verified the backport by recreating it.

7. fanquake added the label Backport on Oct 10, 2016
8. fanquake added this to the milestone 0.13.1 on Oct 10, 2016
9. 
   btcdrak commented at 8:58 AM on October 11, 2016: contributor

   utACK e8a7df8d43f63729daba02fa029a509640b796ba

10. 
    MarcoFalke commented at 9:06 AM on October 11, 2016: member

    Nit: Can you include the original commit hash and pull number in the body? @luke-jr created a devtool for this: https://botbot.me/freenode/bitcoin-core-dev/2016-09-09/?msg=72737288&page=2, which should be added to our master branch.

11. 
    laanwj commented at 6:40 PM on October 13, 2016: member

    This was already backported in #8679, closing

12. laanwj closed this on Oct 13, 2016

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13. DrahtBot locked this on Sep 8, 2021

Milestone
0.13.1