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merge bitcoin#24165: extend inbound eviction protection by network to CJDNS peers

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Kittywhiskers Van Gogh 2024-05-20 19:50:15 +00:00
parent d52724d039
commit 5436b6a82d
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3 changed files with 156 additions and 21 deletions
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12
src/net.cpp
View File

@ -1026,17 +1026,17 @@ void ProtectEvictionCandidatesByRatio(std::vector<NodeEvictionCandidate>& evicti
// Protect the half of the remaining nodes which have been connected the longest.
// This replicates the non-eviction implicit behavior, and precludes attacks that start later.
// To favorise the diversity of our peer connections, reserve up to half of these protected
// spots for Tor/onion, localhost and I2P peers, even if they're not longest uptime overall.
// This helps protect these higher-latency peers that tend to be otherwise
// spots for Tor/onion, localhost, I2P, and CJDNS peers, even if they're not longest uptime
// overall. This helps protect these higher-latency peers that tend to be otherwise
// disadvantaged under our eviction criteria.
const size_t initial_size = eviction_candidates.size();
const size_t total_protect_size{initial_size / 2};
// Disadvantaged networks to protect: I2P, localhost, Tor/onion. In case of equal counts, earlier
// array members have first opportunity to recover unused slots from the previous iteration.
// Disadvantaged networks to protect. In the case of equal counts, earlier array members
// have the first opportunity to recover unused slots from the previous iteration.
struct Net { bool is_local; Network id; size_t count; };
std::array<Net, 3> networks{
{{false, NET_I2P, 0}, {/* localhost */ true, NET_MAX, 0}, {false, NET_ONION, 0}}};
std::array<Net, 4> networks{
{{false, NET_CJDNS, 0}, {false, NET_I2P, 0}, {/*localhost=*/true, NET_MAX, 0}, {false, NET_ONION, 0}}};
// Count and store the number of eviction candidates per network.
for (Net& n : networks) {

2
src/net.h
View File

@ -1661,6 +1661,8 @@ size_t GetRequestedObjectCount(NodeId nodeId) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
*
* - 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.

163
src/test/net_peer_eviction_tests.cpp
View File

@ -112,7 +112,7 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
// Test protection of onion, localhost, and I2P peers...
// Expect 1/4 onion peers to be protected from eviction,
// if no localhost or I2P peers.
// if no localhost, I2P, or CJDNS peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.m_is_local = false;
@ -123,7 +123,7 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
random_context));
// Expect 1/4 onion peers and 1/4 of the other peers to be protected,
// sorted by longest uptime (lowest nTimeConnected), if no localhost or I2P peers.
// sorted by longest uptime (lowest nTimeConnected), if no localhost, I2P or CJDNS peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
@ -135,7 +135,7 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
random_context));
// Expect 1/4 localhost peers to be protected from eviction,
// if no onion or I2P peers.
// if no onion, I2P, or CJDNS peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.m_is_local = (c.id == 1 || c.id == 9 || c.id == 11);
@ -146,7 +146,7 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
random_context));
// Expect 1/4 localhost peers and 1/4 of the other peers to be protected,
// sorted by longest uptime (lowest nTimeConnected), if no onion or I2P peers.
// sorted by longest uptime (lowest nTimeConnected), if no onion, I2P, or CJDNS peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
@ -158,7 +158,7 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
random_context));
// Expect 1/4 I2P peers to be protected from eviction,
// if no onion or localhost peers.
// if no onion, localhost, or CJDNS peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.m_is_local = false;
@ -168,8 +168,8 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
/* unprotected_peer_ids */ {},
random_context));
// Expect 1/4 I2P peers and 1/4 of the other peers to be protected,
// sorted by longest uptime (lowest nTimeConnected), if no onion or localhost peers.
// Expect 1/4 I2P peers and 1/4 of the other peers to be protected, sorted
// by longest uptime (lowest nTimeConnected), if no onion, localhost, or CJDNS peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
@ -180,6 +180,29 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
/* unprotected_peer_ids */ {3, 5, 6, 7, 8, 11},
random_context));
// Expect 1/4 CJDNS peers to be protected from eviction,
// if no onion, localhost, or I2P peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.m_is_local = false;
c.m_network = (c.id == 2 || c.id == 7 || c.id == 10) ? NET_CJDNS : NET_IPV4;
},
/*protected_peer_ids=*/{2, 7, 10},
/*unprotected_peer_ids=*/{},
random_context));
// Expect 1/4 CJDNS peers and 1/4 of the other peers to be protected, sorted
// by longest uptime (lowest nTimeConnected), if no onion, localhost, or I2P peers.
BOOST_CHECK(IsProtected(
num_peers, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = false;
c.m_network = (c.id == 4 || c.id > 8) ? NET_CJDNS : NET_IPV6;
},
/*protected_peer_ids=*/{0, 1, 2, 4, 9, 10},
/*unprotected_peer_ids=*/{3, 5, 6, 7, 8, 11},
random_context));
// Tests with 2 networks...
// Combined test: expect having 1 localhost and 1 onion peer out of 4 to
@ -311,16 +334,16 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
BOOST_CHECK(IsProtected(
4, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id == 3);
if (c.id == 4) {
c.m_is_local = (c.id == 2);
if (c.id == 3) {
c.m_network = NET_I2P;
} else if (c.id == 2) {
} else if (c.id == 1) {
c.m_network = NET_ONION;
} else {
c.m_network = NET_IPV6;
}
},
/* protected_peer_ids */ {0, 4},
/* protected_peer_ids */ {0, 3},
/* unprotected_peer_ids */ {1, 2},
random_context));
@ -438,15 +461,15 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
/* unprotected_peer_ids */ {6, 7, 8, 9, 10, 11, 16, 19, 20, 21, 22, 23},
random_context));
// Combined test: expect having 8 localhost, 4 I2P, and 3 onion peers out of
// 24 to protect 2 of each (6 total), plus 6 others for 12/24 total, sorted
// by longest uptime.
// Combined test: expect having 8 localhost, 4 CJDNS, and 3 onion peers out
// of 24 to protect 2 of each (6 total), plus 6 others for 12/24 total,
// sorted by longest uptime.
BOOST_CHECK(IsProtected(
24, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id > 15);
if (c.id > 10 && c.id < 15) {
c.m_network = NET_I2P;
c.m_network = NET_CJDNS;
} else if (c.id > 6 && c.id < 10) {
c.m_network = NET_ONION;
} else {
@ -456,6 +479,116 @@ BOOST_AUTO_TEST_CASE(peer_protection_test)
/* protected_peer_ids */ {0, 1, 2, 3, 4, 5, 7, 8, 11, 12, 16, 17},
/* unprotected_peer_ids */ {6, 9, 10, 13, 14, 15, 18, 19, 20, 21, 22, 23},
random_context));
// Tests with 4 networks...
// Combined test: expect having 1 CJDNS, 1 I2P, 1 localhost and 1 onion peer
// out of 5 to protect 1 CJDNS, 0 I2P, 0 localhost, 0 onion and 1 other peer
// (2 total), sorted by longest uptime; stable sort breaks tie with array
// order of CJDNS first.
BOOST_CHECK(IsProtected(
5, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id == 3);
if (c.id == 4) {
c.m_network = NET_CJDNS;
} else if (c.id == 1) {
c.m_network = NET_I2P;
} else if (c.id == 2) {
c.m_network = NET_ONION;
} else {
c.m_network = NET_IPV6;
}
},
/* protected_peer_ids */ {0, 4},
/* unprotected_peer_ids */ {1, 2, 3},
random_context));
// Combined test: expect having 1 CJDNS, 1 I2P, 1 localhost and 1 onion peer
// out of 7 to protect 1 CJDNS, 0, I2P, 0 localhost, 0 onion and 2 other
// peers (3 total) sorted by longest uptime; stable sort breaks tie with
// array order of CJDNS first.
BOOST_CHECK(IsProtected(
7, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id == 4);
if (c.id == 6) {
c.m_network = NET_CJDNS;
} else if (c.id == 5) {
c.m_network = NET_I2P;
} else if (c.id == 3) {
c.m_network = NET_ONION;
} else {
c.m_network = NET_IPV4;
}
},
/*protected_peer_ids=*/{0, 1, 6},
/*unprotected_peer_ids=*/{2, 3, 4, 5},
random_context));
// Combined test: expect having 1 CJDNS, 1 I2P, 1 localhost and 1 onion peer
// out of 8 to protect 1 CJDNS, 1 I2P, 0 localhost, 0 onion and 2 other
// peers (4 total) sorted by longest uptime; stable sort breaks tie with
// array order of CJDNS first.
BOOST_CHECK(IsProtected(
8, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id == 3);
if (c.id == 5) {
c.m_network = NET_CJDNS;
} else if (c.id == 6) {
c.m_network = NET_I2P;
} else if (c.id == 3) {
c.m_network = NET_ONION;
} else {
c.m_network = NET_IPV6;
}
},
/*protected_peer_ids=*/{0, 1, 5, 6},
/*unprotected_peer_ids=*/{2, 3, 4, 7},
random_context));
// Combined test: expect having 2 CJDNS, 2 I2P, 4 localhost, and 2 onion
// peers out of 16 to protect 1 CJDNS, 1 I2P, 1 localhost, 1 onion (4/16
// total), plus 4 others for 8 total, sorted by longest uptime.
BOOST_CHECK(IsProtected(
16, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id > 5);
if (c.id == 11 || c.id == 15) {
c.m_network = NET_CJDNS;
} else if (c.id == 10 || c.id == 14) {
c.m_network = NET_I2P;
} else if (c.id == 8 || c.id == 9) {
c.m_network = NET_ONION;
} else {
c.m_network = NET_IPV4;
}
},
/*protected_peer_ids=*/{0, 1, 2, 3, 6, 8, 10, 11},
/*unprotected_peer_ids=*/{4, 5, 7, 9, 12, 13, 14, 15},
random_context));
// Combined test: expect having 6 CJDNS, 1 I2P, 1 localhost, and 4 onion
// peers out of 24 to protect 2 CJDNS, 1 I2P, 1 localhost, and 2 onions (6
// total), plus 6 others for 12/24 total, sorted by longest uptime.
BOOST_CHECK(IsProtected(
24, [](NodeEvictionCandidate& c) {
c.nTimeConnected = c.id;
c.m_is_local = (c.id == 13);
if (c.id > 17) {
c.m_network = NET_CJDNS;
} else if (c.id == 17) {
c.m_network = NET_I2P;
} else if (c.id == 12 || c.id == 14 || c.id == 15 || c.id == 16) {
c.m_network = NET_ONION;
} else {
c.m_network = NET_IPV6;
}
},
/*protected_peer_ids=*/{0, 1, 2, 3, 4, 5, 12, 13, 14, 17, 18, 19},
/*unprotected_peer_ids=*/{6, 7, 8, 9, 10, 11, 15, 16, 20, 21, 22, 23},
random_context));
}
// Returns true if any of the node ids in node_ids are selected for eviction.