Method PushMessage

src/net.cpp:2819–2854

}

void CConnman::PushMessage(CNode* pnode, CSerializedNetMsg&& msg)
{
    size_t nMessageSize = msg.data.size();
    size_t nTotalSize = nMessageSize + CMessageHeader::HEADER_SIZE;
    LogPrint(BCLog::NET, "sending %s (%d bytes) peer=%d\n",  SanitizeString(msg.command.c_str()), nMessageSize, pnode->GetId());

    std::vector<unsigned char> serializedHeader;
    serializedHeader.reserve(CMessageHeader::HEADER_SIZE);
    uint256 hash = Hash(msg.data.data(), msg.data.data() + nMessageSize);
    CMessageHeader hdr(Params().MessageStart(), msg.command.c_str(), nMessageSize);
    memcpy(hdr.pchChecksum, hash.begin(), CMessageHeader::CHECKSUM_SIZE);

    CVectorWriter{SER_NETWORK, INIT_PROTO_VERSION, serializedHeader, 0, hdr};

    size_t nBytesSent = 0;
    {
        LOCK(pnode->cs_vSend);
        bool optimisticSend(pnode->vSendMsg.empty());

        //log total amount of bytes per command
        pnode->mapSendBytesPerMsgCmd[msg.command] += nTotalSize;
        pnode->nSendSize += nTotalSize;

        if (pnode->nSendSize > nSendBufferMaxSize)
            pnode->fPauseSend = true;
        pnode->vSendMsg.push_back(std::move(serializedHeader));
        if (nMessageSize)
            pnode->vSendMsg.push_back(std::move(msg.data));

        // If write queue empty, attempt "optimistic write"
        if (optimisticSend == true)
            nBytesSent = SocketSendData(pnode);
    }
    if (nBytesSent)
        RecordBytesSent(nBytesSent);
}

bool CConnman::ForNode(NodeId id, std::function<bool(CNode* pnode)> func)
{