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Merge #12603: [docs] PeerLogicValidation interface

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b7cd08b71 Add documentation to PeerLogicValidation interface and related functions (James O'Beirne)

Pull request description:

  Adds docs for PeerLogicValidation's public interface and two related functions.

Tree-SHA512: b4c2f47e9baa9396d2b6faf3792e46b371c50cd91b9ac890f263f4d14eb24a71e7b40ceb4cbb41e254f5008eff357f417b842618e7ebece9039802ab2a5dd728
This commit is contained in:
Wladimir J. van der Laan 2018-03-06 21:45:41 +01:00
commit 85424d79ed
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2 changed files with 45 additions and 3 deletions
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30
src/net_processing.cpp
View File

@ -401,6 +401,12 @@ void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) {
}
}
/**
* When a peer sends us a valid block, instruct it to announce blocks to us
* using CMPCTBLOCK if possible by adding its nodeid to the end of
* lNodesAnnouncingHeaderAndIDs, and keeping that list under a certain size by
* removing the first element if necessary.
*/
void MaybeSetPeerAsAnnouncingHeaderAndIDs(NodeId nodeid, CConnman* connman) {
AssertLockHeld(cs_main);
CNodeState* nodestate = State(nodeid);
@ -749,7 +755,11 @@ unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
return nEvicted;
}
// Requires cs_main.
/**
* Mark a misbehaving peer to be banned depending upon the value of `-banscore`.
*
* Requires cs_main.
*/
void Misbehaving(NodeId pnode, int howmuch, const std::string& message)
{
if (howmuch == 0)
@ -808,6 +818,10 @@ PeerLogicValidation::PeerLogicValidation(CConnman* connmanIn, CScheduler &schedu
scheduler.scheduleEvery(std::bind(&PeerLogicValidation::CheckForStaleTipAndEvictPeers, this, consensusParams), EXTRA_PEER_CHECK_INTERVAL * 1000);
}
/**
* Evict orphan txn pool entries (EraseOrphanTx) based on a newly connected
* block. Also save the time of the last tip update.
*/
void PeerLogicValidation::BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindex, const std::vector<CTransactionRef>& vtxConflicted) {
LOCK(g_cs_orphans);
@ -828,7 +842,7 @@ void PeerLogicValidation::BlockConnected(const std::shared_ptr<const CBlock>& pb
}
}
// Erase orphan transactions include or precluded by this block
// Erase orphan transactions included or precluded by this block
if (vOrphanErase.size()) {
int nErased = 0;
for (uint256 &orphanHash : vOrphanErase) {
@ -847,6 +861,10 @@ static std::shared_ptr<const CBlockHeaderAndShortTxIDs> most_recent_compact_bloc
static uint256 most_recent_block_hash;
static bool fWitnessesPresentInMostRecentCompactBlock;
/**
* Maintain state about the best-seen block and fast-announce a compact block
* to compatible peers.
*/
void PeerLogicValidation::NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) {
std::shared_ptr<const CBlockHeaderAndShortTxIDs> pcmpctblock = std::make_shared<const CBlockHeaderAndShortTxIDs> (*pblock, true);
const CNetMsgMaker msgMaker(PROTOCOL_VERSION);
@ -888,6 +906,10 @@ void PeerLogicValidation::NewPoWValidBlock(const CBlockIndex *pindex, const std:
});
}
/**
* Update our best height and announce any block hashes which weren't previously
* in chainActive to our peers.
*/
void PeerLogicValidation::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) {
const int nNewHeight = pindexNew->nHeight;
connman->SetBestHeight(nNewHeight);
@ -920,6 +942,10 @@ void PeerLogicValidation::UpdatedBlockTip(const CBlockIndex *pindexNew, const CB
nTimeBestReceived = GetTime();
}
/**
* Handle invalid block rejection and consequent peer banning, maintain which
* peers announce compact blocks.
*/
void PeerLogicValidation::BlockChecked(const CBlock& block, const CValidationState& state) {
LOCK(cs_main);

18
src/net_processing.h
View File

@ -42,13 +42,26 @@ private:
public:
explicit PeerLogicValidation(CConnman* connman, CScheduler &scheduler);
/**
* Overridden from CValidationInterface.
*/
void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected, const std::vector<CTransactionRef>& vtxConflicted) override;
/**
* Overridden from CValidationInterface.
*/
void UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload) override;
/**
* Overridden from CValidationInterface.
*/
void BlockChecked(const CBlock& block, const CValidationState& state) override;
/**
* Overridden from CValidationInterface.
*/
void NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) override;
/** Initialize a peer by adding it to mapNodeState and pushing a message requesting its version */
void InitializeNode(CNode* pnode) override;
/** Handle removal of a peer by updating various state and removing it from mapNodeState */
void FinalizeNode(NodeId nodeid, bool& fUpdateConnectionTime) override;
/** Process protocol messages received from a given node */
bool ProcessMessages(CNode* pfrom, std::atomic<bool>& interrupt) override;
@ -61,8 +74,11 @@ public:
*/
bool SendMessages(CNode* pto, std::atomic<bool>& interrupt) override;
/** Consider evicting an outbound peer based on the amount of time they've been behind our tip */
void ConsiderEviction(CNode *pto, int64_t time_in_seconds);
/** Evict extra outbound peers. If we think our tip may be stale, connect to an extra outbound */
void CheckForStaleTipAndEvictPeers(const Consensus::Params &consensusParams);
/** If we have extra outbound peers, try to disconnect the one with the oldest block announcement */
void EvictExtraOutboundPeers(int64_t time_in_seconds);
private: