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p2p: Try to connect to anchors once

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Hennadii Stepanov 2020-06-05 09:38:09 +03:00
parent 5543c7ab28
commit 0a85e5a7bc
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GPG key ID: 410108112E7EA81F
2 changed files with 21 additions and 3 deletions
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20
src/net.cpp
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@ -1930,10 +1930,12 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect)
ConnectionType conn_type = ConnectionType::OUTBOUND_FULL_RELAY;
int64_t nTime = GetTimeMicros();
bool anchor = false;
bool fFeeler = false;
// Determine what type of connection to open. Opening
// OUTBOUND_FULL_RELAY connections gets the highest priority until we
// BLOCK_RELAY connections to addresses from anchors.dat gets the highest
// priority. Then we open OUTBOUND_FULL_RELAY priority until we
// meet our full-relay capacity. Then we open BLOCK_RELAY connection
// until we hit our block-relay-only peer limit.
// GetTryNewOutboundPeer() gets set when a stale tip is detected, so we
@ -1941,7 +1943,10 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect)
// these conditions are met, check the nNextFeeler timer to decide if
// we should open a FEELER.
if (nOutboundFullRelay < m_max_outbound_full_relay) {
if (!m_anchors.empty() && (nOutboundBlockRelay < m_max_outbound_block_relay)) {
conn_type = ConnectionType::BLOCK_RELAY;
anchor = true;
} else if (nOutboundFullRelay < m_max_outbound_full_relay) {
// OUTBOUND_FULL_RELAY
} else if (nOutboundBlockRelay < m_max_outbound_block_relay) {
conn_type = ConnectionType::BLOCK_RELAY;
@ -1962,6 +1967,17 @@ void CConnman::ThreadOpenConnections(const std::vector<std::string> connect)
int nTries = 0;
while (!interruptNet)
{
if (anchor && !m_anchors.empty()) {
const CAddress addr = m_anchors.back();
m_anchors.pop_back();
if (!addr.IsValid() || IsLocal(addr) || !IsReachable(addr) ||
!HasAllDesirableServiceFlags(addr.nServices) ||
setConnected.count(addr.GetGroup(addrman.m_asmap))) continue;
addrConnect = addr;
LogPrint(BCLog::NET, "Trying to make an anchor connection to %s\n", addrConnect.ToString());
break;
}
// If we didn't find an appropriate destination after trying 100 addresses fetched from addrman,
// stop this loop, and let the outer loop run again (which sleeps, adds seed nodes, recalculates
// already-connected network ranges, ...) before trying new addrman addresses.

4
src/net.h
View file

@ -174,7 +174,9 @@ enum class ConnectionType {
* attacks. By not relaying transactions or addresses, these connections
* are harder to detect by a third party, thus helping obfuscate the
* network topology. We automatically attempt to open
* MAX_BLOCK_RELAY_ONLY_CONNECTIONS using addresses from our AddrMan.
* MAX_BLOCK_RELAY_ONLY_ANCHORS using addresses from our anchors.dat. Then
* addresses from our AddrMan if MAX_BLOCK_RELAY_ONLY_CONNECTIONS
* isn't reached yet.
*/
BLOCK_RELAY,