Add uptime to crawl data (RIPD-997)

src/ripple/overlay/impl/OverlayImpl.cpp

@@ -744,6 +744,7 @@ OverlayImpl::size()
 Json::Value
 OverlayImpl::crawl()
 {
+    using namespace std::chrono;
     Json::Value jv;
     auto& av = jv["active"] = Json::Value(Json::arrayValue);
     std::lock_guard <decltype(mutex_)> lock (mutex_);
@@ -752,12 +753,14 @@ OverlayImpl::crawl()
         if (auto const sp = e.second.lock())
         {
             auto& pv = av.append(Json::Value(Json::objectValue));
-            pv[jss::type] = "peer";
             pv[jss::public_key] = beast::base64_encode(
                 sp->getNodePublic().getNodePublic().data(),
                     sp->getNodePublic().getNodePublic().size());
             pv[jss::type] = sp->slot()->inbound() ?
                 "in" : "out";
+            pv[jss::uptime] =
+                static_cast<std::uint32_t>(duration_cast<seconds>(
+                    sp->uptime()).count());
             if (sp->crawl())
             {
                 pv[jss::ip] = sp->getRemoteAddress().address().to_string();

src/ripple/overlay/impl/PeerImp.cpp

@@ -75,6 +75,7 @@ PeerImp::PeerImp (id_t id, endpoint_type remote_endpoint,
     , sanity_ (Sanity::unknown)
     , insaneTime_ (clock_type::now())
     , publicKey_(publicKey)
+    , creationTime_ (clock_type::now())
     , hello_(hello)
     , usage_(consumer)
     , fee_ (Resource::feeLightPeer)

src/ripple/overlay/impl/PeerImp.h

@@ -143,6 +143,7 @@ private:
     std::chrono::milliseconds latency_ = std::chrono::milliseconds (-1);
     std::uint64_t lastPingSeq_ = 0;
     clock_type::time_point lastPingTime_;
+    clock_type::time_point creationTime_;
 
     std::mutex mutable recentLock_;
     protocol::TMStatusChange last_status_;
@@ -279,6 +280,13 @@ public:
     std::string
     getVersion() const;
 
+    // Return the connection elapsed time.
+    clock_type::duration
+    uptime() const
+    {
+        return clock_type::now() - creationTime_;
+    }
+
     Json::Value
     json() override;
 
@@ -497,6 +505,7 @@ PeerImp::PeerImp (std::unique_ptr<beast::asio::ssl_bundle>&& ssl_bundle,
     , sanity_ (Sanity::unknown)
     , insaneTime_ (clock_type::now())
     , publicKey_ (legacyPublicKey)
+    , creationTime_ (clock_type::now())
     , hello_ (std::move(hello))
     , usage_ (usage)
     , fee_ (Resource::feeLightPeer)