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Merge #19107: p2p: Move all header verification into the network layer, extend logging

Browse Source 
deb52711a1 Remove header checks out of net_processing (Troy Giorshev)
52d4ae46ab Give V1TransportDeserializer CChainParams& member (Troy Giorshev)
5bceef6b12 Change CMessageHeader Constructor (Troy Giorshev)
1ca20c1af8 Add doxygen comment for ReceiveMsgBytes (Troy Giorshev)
890b1d7c2b Move checksum check from net_processing to net (Troy Giorshev)
2716647ebf Give V1TransportDeserializer an m_node_id member (Troy Giorshev)

Pull request description:

  Inspired by #15206 and #15197, this PR moves all message header verification from the message processing layer and into the network/transport layer.

  In the previous PRs there is a change in behavior, where we would disconnect from peers upon a single failed checksum check.  In various discussions there was concern over whether this was the right choice, and some expressed a desire to see how this would look if it was made to be a pure refactor.

  For more context, see https://bitcoincore.reviews/15206.html#l-81.

  This PR improves the separation between the p2p layers, helping improvements like [BIP324](https://github.com/bitcoin/bitcoin/pull/18242) and #18989.

ACKs for top commit:
  ryanofsky:
    Code review ACK deb52711a1 just rebase due to conflict on adjacent line
  jnewbery:
    Code review ACK deb52711a1.

Tree-SHA512: 1a3b7ae883b020cfee1bef968813e04df651ffdad9dd961a826bd80654f2c98676ce7f4721038a1b78d8790e4cebe8060419e3d8affc97ce2b9b4e4b72e6fa9f
This commit is contained in:
fanquake
2020-09-29 15:50:03 +08:00
parent e36aa351a3 deb52711a1
commit 6af9b31bfc
8 changed files with 99 additions and 109 deletions
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32
src/net_processing.cpp
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@@ -3815,14 +3815,6 @@ 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())
@@ -3863,35 +3855,13 @@ 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
unsigned int nMessageSize = msg.m_message_size;
// Checksum
CDataStream& vRecv = msg.m_recv;
if (!msg.m_valid_checksum)
{
LogPrint(BCLog::NET, "%s(%s, %u bytes): CHECKSUM ERROR peer=%d\n", __func__,
SanitizeString(msg_type), nMessageSize, pfrom->GetId());
return fMoreWork;
}
try {
ProcessMessage(*pfrom, msg_type, vRecv, msg.m_time, interruptMsgProc);
ProcessMessage(*pfrom, msg_type, msg.m_recv, msg.m_time, interruptMsgProc);
if (interruptMsgProc)
return false;
if (!pfrom->vRecvGetData.empty())