Ping automatically every 2 minutes (unconditionally)

... instead of after 30 minutes of no sending, for latency measurement
and keep-alive. Also, disconnect if no reply arrives within 20 minutes,
instead of 90 of inactivity (for peers supporting the 'pong' message).

1 files changed, 11 insertions, 7 deletions

diff --git a/src/net.cpp b/src/net.cpp
index 479f77c46..fe6e9337a 100644
--- a/src/net.cpp
+++ b/src/net.cpp
@@ -1028,23 +1028,27 @@ void ThreadSocketHandler()
             //
             // Inactivity checking
             //
-            if (pnode->vSendMsg.empty())
-                pnode->nLastSendEmpty = GetTime();
-            if (GetTime() - pnode->nTimeConnected > 60)
+            int64_t nTime = GetTime();
+            if (nTime - pnode->nTimeConnected > 60)
             {
                 if (pnode->nLastRecv == 0 || pnode->nLastSend == 0)
                 {
                     LogPrint("net", "socket no message in first 60 seconds, %d %d\n", pnode->nLastRecv != 0, pnode->nLastSend != 0);
                     pnode->fDisconnect = true;
                 }
-                else if (GetTime() - pnode->nLastSend > 90*60 && GetTime() - pnode->nLastSendEmpty > 90*60)
+                else if (nTime - pnode->nLastSend > TIMEOUT_INTERVAL)
                 {
-                    LogPrintf("socket not sending\n");
+                    LogPrintf("socket sending timeout: %is\n", nTime - pnode->nLastSend);
                     pnode->fDisconnect = true;
                 }
-                else if (GetTime() - pnode->nLastRecv > 90*60)
+                else if (nTime - pnode->nLastRecv > (pnode->nVersion > BIP0031_VERSION ? TIMEOUT_INTERVAL : 90*60))
                 {
-                    LogPrintf("socket inactivity timeout\n");
+                    LogPrintf("socket receive timeout: %is\n", nTime - pnode->nLastRecv);
+                    pnode->fDisconnect = true;
+                }
+                else if (pnode->nPingNonceSent && pnode->nPingUsecStart + TIMEOUT_INTERVAL * 1000000 < GetTimeMicros())
+                {
+                    LogPrintf("ping timeout: %fs\n", 0.000001 * (GetTimeMicros() - pnode->nPingUsecStart));
                     pnode->fDisconnect = true;
                 }
             }