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Merge bitcoin/bitcoin#28464: net: improve max-connection limits code

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df69b22f2e doc: improve documentation around connection limit maximums (Amiti Uttarwar)
adc171edf4 scripted-diff: Rename connection limit variables (Amiti Uttarwar)
e9fd9c0225 net: add m_max_inbound to connman (Amiti Uttarwar)
c25e0e0555 net, refactor: move calculations for connection type limits into connman (Amiti Uttarwar)

Pull request description:

  This is joint work with amitiuttarwar.

  This has the first few commits of #28463. It is not strictly a prerequisite for that, but has changes that in our opinion make sense on their own.
  It improves the handling of maximum numbers for different connection types (that are set during init and don’t change after) by:
  * moving all calculations into one place, `CConnMan::Init()`. Before, they were dispersed between `Init`, `CConnman::Init` and other parts of `CConnman`, resulting in some duplicated test code.
  * removing the possibility of having a negative maximum of inbound connections, which is hard to argue about
  * renaming of variables and doc improvements

ACKs for top commit:
  amitiuttarwar:
    co-author review ACK df69b22f2e
  naumenkogs:
    ACK df69b22f2e
  achow101:
    ACK df69b22f2e

Tree-SHA512: 913d56136bc1df739978de50db67302f88bac2a9d34748ae96763288d97093e998fc0f94f9b6eff12867712d7e86225af6128f4170bf2b5b8ab76f024870a22c
This commit is contained in:
Andrew Chow
2023-11-07 16:53:37 -05:00
parent 962ea5c525 df69b22f2e
commit 82ea4e787c
4 changed files with 34 additions and 35 deletions
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8
src/init.cpp
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@@ -489,7 +489,7 @@ void SetupServerArgs(ArgsManager& argsman)
argsman.AddArg("-forcednsseed", strprintf("Always query for peer addresses via DNS lookup (default: %u)", DEFAULT_FORCEDNSSEED), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-listen", strprintf("Accept connections from outside (default: %u if no -proxy, -connect or -maxconnections=0)", DEFAULT_LISTEN), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-listenonion", strprintf("Automatically create Tor onion service (default: %d)", DEFAULT_LISTEN_ONION), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-maxconnections=<n>", strprintf("Maintain at most <n> connections to peers (default: %u). This limit does not apply to connections manually added via -addnode or the addnode RPC, which have a separate limit of %u.", DEFAULT_MAX_PEER_CONNECTIONS, MAX_ADDNODE_CONNECTIONS), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-maxconnections=<n>", strprintf("Maintain at most <n> automatic connections to peers (default: %u). This limit does not apply to connections manually added via -addnode or the addnode RPC, which have a separate limit of %u.", DEFAULT_MAX_PEER_CONNECTIONS, MAX_ADDNODE_CONNECTIONS), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-maxreceivebuffer=<n>", strprintf("Maximum per-connection receive buffer, <n>*1000 bytes (default: %u)", DEFAULT_MAXRECEIVEBUFFER), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-maxsendbuffer=<n>", strprintf("Maximum per-connection memory usage for the send buffer, <n>*1000 bytes (default: %u)", DEFAULT_MAXSENDBUFFER), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
argsman.AddArg("-maxtimeadjustment", strprintf("Maximum allowed median peer time offset adjustment. Local perspective of time may be influenced by outbound peers forward or backward by this amount (default: %u seconds).", DEFAULT_MAX_TIME_ADJUSTMENT), ArgsManager::ALLOW_ANY, OptionsCategory::CONNECTION);
@@ -1751,11 +1751,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
CConnman::Options connOptions;
connOptions.nLocalServices = nLocalServices;
connOptions.nMaxConnections = nMaxConnections;
connOptions.m_max_outbound_full_relay = std::min(MAX_OUTBOUND_FULL_RELAY_CONNECTIONS, connOptions.nMaxConnections);
connOptions.m_max_outbound_block_relay = std::min(MAX_BLOCK_RELAY_ONLY_CONNECTIONS, connOptions.nMaxConnections-connOptions.m_max_outbound_full_relay);
connOptions.nMaxAddnode = MAX_ADDNODE_CONNECTIONS;
connOptions.nMaxFeeler = MAX_FEELER_CONNECTIONS;
connOptions.m_max_automatic_connections = nMaxConnections;
connOptions.uiInterface = &uiInterface;
connOptions.m_banman = node.banman.get();
connOptions.m_msgproc = node.peerman.get();