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net: add m_max_inbound to connman

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Extract the logic for calculating & maintaining inbound connection limits to be
a member within connman for consistency with other maximum connection limits.

Note that we now limit m_max_inbound to 0 and don't call
AttemptToEvictConnection() when we don't have any inbounds.
Previously, nMaxInbound could become negative if the user ran with a low
-maxconnections, which didn't break any logic but didn't make sense.

Co-authored-by: Martin Zumsande <mzumsande@gmail.com>
This commit is contained in:
Amiti Uttarwar 2023-08-31 13:41:30 -07:00 • committed by Martin Zumsande
parent c25e0e0555
commit e9fd9c0225
2 changed files with 4 additions and 3 deletions
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5
src/net.cpp
View file

@ -1777,7 +1777,6 @@ void CConnman::CreateNodeFromAcceptedSocket(std::unique_ptr<Sock>&& sock,
const CAddress& addr)
{
int nInbound = 0;
int nMaxInbound = nMaxConnections - m_max_outbound;
AddWhitelistPermissionFlags(permission_flags, addr);
if (NetPermissions::HasFlag(permission_flags, NetPermissionFlags::Implicit)) {
@ -1823,13 +1822,13 @@ void CConnman::CreateNodeFromAcceptedSocket(std::unique_ptr<Sock>&& sock,
// Only accept connections from discouraged peers if our inbound slots aren't (almost) full.
bool discouraged = m_banman && m_banman->IsDiscouraged(addr);
if (!NetPermissions::HasFlag(permission_flags, NetPermissionFlags::NoBan) && nInbound + 1 >= nMaxInbound && discouraged)
if (!NetPermissions::HasFlag(permission_flags, NetPermissionFlags::NoBan) && nInbound + 1 >= m_max_inbound && discouraged)
{
LogPrint(BCLog::NET, "connection from %s dropped (discouraged)\n", addr.ToStringAddrPort());
return;
}
if (nInbound >= nMaxInbound)
if (nInbound >= m_max_inbound)
{
if (!AttemptToEvictConnection()) {
// No connection to evict, disconnect the new connection