Method MaybeSendPing

src/net_processing.cpp:5443–5484

}

void PeerManagerImpl::MaybeSendPing(CNode& node_to, Peer& peer, NodeClock::time_point now)
{
    if (m_connman.ShouldRunInactivityChecks(node_to, now) &&
        peer.m_ping_nonce_sent &&
        now > peer.m_ping_start.load() + TIMEOUT_INTERVAL)
    {
        // The ping timeout is using mocktime. To disable the check during
        // testing, increase -peertimeout.
        LogDebug(BCLog::NET, "ping timeout: %fs, %s", Ticks<SecondsDouble>(now - peer.m_ping_start.load()), node_to.DisconnectMsg());
        node_to.fDisconnect = true;
        return;
    }

    bool pingSend = false;

    if (peer.m_ping_queued) {
        // RPC ping request by user
        pingSend = true;
    }

    if (peer.m_ping_nonce_sent == 0 && now > peer.m_ping_start.load() + PING_INTERVAL) {
        // Ping automatically sent as a latency probe & keepalive.
        pingSend = true;
    }

    if (pingSend) {
        uint64_t nonce;
        do {
            nonce = FastRandomContext().rand64();
        } while (nonce == 0);
        peer.m_ping_queued = false;
        peer.m_ping_start = now;
        if (node_to.GetCommonVersion() > BIP0031_VERSION) {
            peer.m_ping_nonce_sent = nonce;
            MakeAndPushMessage(node_to, NetMsgType::PING, nonce);
        } else {
            // Peer is too old to support ping message type with nonce, pong will never arrive.
            peer.m_ping_nonce_sent = 0;
            MakeAndPushMessage(node_to, NetMsgType::PING);
        }
    }
}

void PeerManagerImpl::MaybeSendAddr(CNode& node, Peer& peer, std::chrono::microseconds current_time)
{