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Remove header checks out of net_processing

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This moves header size and netmagic checking out of net_processing and
into net.  This check now runs in ReadHeader, so that net can exit early
out of receiving bytes from the peer.  IsValid is now slimmed down, so
it no longer needs a MessageStartChars& parameter.

Additionally this removes the rest of the m_valid_* members from
CNetMessage.
This commit is contained in:
Troy Giorshev 2020-05-26 17:01:57 -04:00
parent 52d4ae46ab
commit deb52711a1
8 changed files with 32 additions and 62 deletions
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21
src/net_processing.cpp
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@ -3820,14 +3820,6 @@ bool PeerManager::MaybeDiscourageAndDisconnect(CNode& pnode)
bool PeerManager::ProcessMessages(CNode* pfrom, std::atomic<bool>& interruptMsgProc)
{
//
// Message format
// (4) message start
// (12) command
// (4) size
// (4) checksum
// (x) data
//
bool fMoreWork = false;
if (!pfrom->vRecvGetData.empty())
@ -3868,19 +3860,6 @@ bool PeerManager::ProcessMessages(CNode* pfrom, std::atomic<bool>& interruptMsgP
CNetMessage& msg(msgs.front());
msg.SetVersion(pfrom->GetCommonVersion());
// Check network magic
if (!msg.m_valid_netmagic) {
LogPrint(BCLog::NET, "PROCESSMESSAGE: INVALID MESSAGESTART %s peer=%d\n", SanitizeString(msg.m_command), pfrom->GetId());
pfrom->fDisconnect = true;
return false;
}
// Check header
if (!msg.m_valid_header)
{
LogPrint(BCLog::NET, "PROCESSMESSAGE: ERRORS IN HEADER %s peer=%d\n", SanitizeString(msg.m_command), pfrom->GetId());
return fMoreWork;
}
const std::string& msg_type = msg.m_command;
// Message size