Function ProcessMessages

src/main.cpp:7239–7346

requires LOCK(cs_vRecvMsg)

// requires LOCK(cs_vRecvMsg)
bool ProcessMessages(CNode* pfrom)
{
    const CChainParams& chainparams = Params();
    //if (fDebug)
    //    LogPrintf("ProcessMessages(%u messages)\n", pfrom->vRecvMsg.size());

    //
    // Message format
    //  (4) message start
    //  (12) command
    //  (4) size
    //  (4) checksum
    //  (x) data
    //
    bool fOk = true;

    if (!pfrom->vRecvGetData.empty())
        ProcessGetData(pfrom, chainparams.GetConsensus());

    // this maintains the order of responses
    if (!pfrom->vRecvGetData.empty()) return fOk;

    std::deque<CNetMessage>::iterator it = pfrom->vRecvMsg.begin();
    while (!pfrom->fDisconnect && it != pfrom->vRecvMsg.end()) {
        // Don't bother if send buffer is too full to respond anyway
        if (pfrom->nSendSize >= SendBufferSize())
            break;

        // get next message
        CNetMessage& msg = *it;

        //if (fDebug)
        //    LogPrintf("ProcessMessages(message %u msgsz, %u bytes, complete:%s)\n",
        //            msg.hdr.nMessageSize, msg.vRecv.size(),
        //            msg.complete() ? "Y" : "N");

        // end, if an incomplete message is found
        if (!msg.complete())
            break;

        // at this point, any failure means we can delete the current message
        it++;

        // Scan for message start
        if (memcmp(msg.hdr.pchMessageStart, chainparams.MessageStart(), MESSAGE_START_SIZE) != 0) {
            LogPrint("net", "%s: INVALID MESSAGESTART %s peer=%d\n", __func__, SanitizeString(msg.hdr.GetCommand()), pfrom->id);
            fOk = false;
            break;
        }

        // Read header
        CMessageHeader& hdr = msg.hdr;
        if (!hdr.IsValid()) {
            LogPrint("net", "%s: ERRORS IN HEADER %s peer=%d\n", __func__, SanitizeString(hdr.GetCommand()), pfrom->id);
            continue;
        }
        string strCommand = hdr.GetCommand();