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[net processing] Clarify UpdatedBlockTip()

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This commit is contained in:
John Newbery 2020-12-11 10:40:19 +00:00
parent 94d2cc35be
commit f6360088de
1 changed files with 22 additions and 20 deletions
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42
src/net_processing.cpp
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@ -1296,28 +1296,30 @@ void PeerManager::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockInde
m_connman.SetBestHeight(pindexNew->nHeight);
SetServiceFlagsIBDCache(!fInitialDownload);
// Relay inventory, but don't relay old inventory during initial block download.
if (!fInitialDownload) {
// Find the hashes of all blocks that weren't previously in the best chain.
std::vector<uint256> vHashes;
const CBlockIndex *pindexToAnnounce = pindexNew;
while (pindexToAnnounce != pindexFork) {
vHashes.push_back(pindexToAnnounce->GetBlockHash());
pindexToAnnounce = pindexToAnnounce->pprev;
if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
// Limit announcements in case of a huge reorganization.
// Rely on the peer's synchronization mechanism in that case.
break;
}
// Don't relay inventory during initial block download.
if (fInitialDownload) return;
// Find the hashes of all blocks that weren't previously in the best chain.
std::vector<uint256> vHashes;
const CBlockIndex *pindexToAnnounce = pindexNew;
while (pindexToAnnounce != pindexFork) {
vHashes.push_back(pindexToAnnounce->GetBlockHash());
pindexToAnnounce = pindexToAnnounce->pprev;
if (vHashes.size() == MAX_BLOCKS_TO_ANNOUNCE) {
// Limit announcements in case of a huge reorganization.
// Rely on the peer's synchronization mechanism in that case.
break;
}
m_connman.ForEachNode([&vHashes](CNode* pnode) {
LOCK(pnode->cs_inventory);
for (const uint256& hash : reverse_iterate(vHashes)) {
pnode->vBlockHashesToAnnounce.push_back(hash);
}
});
m_connman.WakeMessageHandler();
}
// Relay to all peers
m_connman.ForEachNode([&vHashes](CNode* pnode) {
LOCK(pnode->cs_inventory);
for (const uint256& hash : reverse_iterate(vHashes)) {
pnode->vBlockHashesToAnnounce.push_back(hash);
}
});
m_connman.WakeMessageHandler();
}
/**