[net] Add RunInactivityChecks()

Moves the logic to prevent running inactivity checks until
the peer has been connected for -peertimeout time into its
own function. This will be reused by net_processing later.

Author: jnewbery

src/net.cpp

@@ -1221,18 +1221,17 @@ void CConnman::NotifyNumConnectionsChanged()
     }
 }
 
+bool CConnman::RunInactivityChecks(const CNode& node) const
+{
+    return GetSystemTimeInSeconds() > node.nTimeConnected + m_peer_connect_timeout;
+}
+
 bool CConnman::InactivityCheck(const CNode& node) const
 {
     // Use non-mockable system time (otherwise these timers will pop when we
     // use setmocktime in the tests).
     int64_t now = GetSystemTimeInSeconds();
 
-    if (now <= node.nTimeConnected + m_peer_connect_timeout) {
-        // Only run inactivity checks if the peer has been connected longer
-        // than m_peer_connect_timeout.
-        return false;
-    }
-
     if (node.nLastRecv == 0 || node.nLastSend == 0) {
         LogPrint(BCLog::NET, "socket no message in first %i seconds, %d %d peer=%d\n", m_peer_connect_timeout, node.nLastRecv != 0, node.nLastSend != 0, node.GetId());
         return true;
@@ -1537,7 +1536,7 @@ void CConnman::SocketHandler()
             if (bytes_sent) RecordBytesSent(bytes_sent);
         }
 
-        if (InactivityCheck(*pnode)) pnode->fDisconnect = true;
+        if (RunInactivityChecks(*pnode) && InactivityCheck(*pnode)) pnode->fDisconnect = true;
     }
     {
         LOCK(cs_vNodes);

src/net.h

@@ -1022,6 +1022,9 @@ class CConnman
 
     void SetAsmap(std::vector<bool> asmap) { addrman.m_asmap = std::move(asmap); }
 
+    /** Return true if the peer has been connected for long enough to do inactivity checks. */
+    bool RunInactivityChecks(const CNode& node) const;
+
 private:
     struct ListenSocket {
     public: