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| author | Miguel Herranz <miguel@ipglider.org> | 2017-02-05 23:46:47 +0100 |
|---|---|---|
| committer | Miguel Herranz <miguel@ipglider.org> | 2017-02-27 18:29:50 +0100 |
| commit | f3be9991d7517182c416b1139d09f3943e31f0ee (patch) | |
| tree | dd311599d47746a7652b8f27bbbf1c0508e77379 /src/p2p/net_peerlist.h | |
| parent | Merge pull request #1798 (diff) | |
| download | monero-f3be9991d7517182c416b1139d09f3943e31f0ee.tar.xz | |
Make get_random_gray_peer distribution uniform
get_random_gray_peer is used to implement feeler connections, described
in: https://eprint.iacr.org/2015/263.pdf 2. Random selection
Diffstat (limited to 'src/p2p/net_peerlist.h')
| -rw-r--r-- | src/p2p/net_peerlist.h | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/src/p2p/net_peerlist.h b/src/p2p/net_peerlist.h index 6b999207b..11d995995 100644 --- a/src/p2p/net_peerlist.h +++ b/src/p2p/net_peerlist.h @@ -408,13 +408,10 @@ namespace nodetool return false; } - size_t x = crypto::rand<size_t>() % (m_peers_gray.size() + 1); - size_t res = (x * x * x) / (m_peers_gray.size() * m_peers_gray.size()); //parabola \/ - - LOG_PRINT_L3("Random gray peer index=" << res << "(x="<< x << ", max_index=" << m_peers_gray.size() << ")"); + size_t random_index = crypto::rand<size_t>() % m_peers_gray.size(); peers_indexed::index<by_time>::type& by_time_index = m_peers_gray.get<by_time>(); - pe = *epee::misc_utils::move_it_backward(--by_time_index.end(), res); + pe = *epee::misc_utils::move_it_backward(--by_time_index.end(), random_index); return true; |