factorized common dependencies

src/node.cpp

@@ -0,0 +1,84 @@
+/*
+Copyright (C) 2009-2014 Juliusz Chroboczek
+Copyright (C) 2014-2016 Savoir-faire Linux Inc.
+
+Author(s) : Adrien Béraud <adrien.beraud@savoirfairelinux.com>,
+            Simon Désaulniers <sim.desaulniers@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include "node.h"
+
+namespace dht {
+
+constexpr std::chrono::minutes Node::NODE_EXPIRE_TIME;
+constexpr std::chrono::minutes Node::NODE_GOOD_TIME;
+constexpr std::chrono::seconds Node::MAX_RESPONSE_TIME;
+
+/* This is our definition of a known-good node. */
+Node::isGood(time_point now) const
+{
+    return
+        not isExpired(now) &&
+        reply_time >= now - NODE_GOOD_TIME &&
+        time >= now - NODE_EXPIRE_TIME;
+}
+
+bool
+Node::isExpired(time_point now) const
+{
+    return pinged >= 3 && reply_time < pinged_time && pinged_time + MAX_RESPONSE_TIME < now;
+}
+
+bool
+Node::isMessagePending(time_point now) const
+{
+    return reply_time < pinged_time && pinged_time + MAX_RESPONSE_TIME > now;
+}
+
+void
+Node::update(const sockaddr* sa, socklen_t salen)
+{
+    std::copy_n((const uint8_t*)sa, salen, (uint8_t*)&ss);
+    sslen = salen;
+}
+
+/** To be called when a message was sent to the node */
+void
+Node::requested(time_point now)
+{
+    pinged++;
+    if (reply_time > pinged_time || pinged_time + MAX_RESPONSE_TIME < now)
+        pinged_time = now;
+}
+
+/** To be called when a message was received from the node.
+ Answer should be true if the message was an aswer to a request we made*/
+void
+Node::received(time_point now, bool answer)
+{
+    time = now;
+    if (answer) {
+        pinged = 0;
+        reply_time = now;
+    }
+}
+
+}