Merge #12329: net: don't retry failed oneshot connections forever

660f5f1 net: don't retry failed oneshot connections forever (Cory Fields)

Pull request description:

  As introduced by (my suggestion, sorry, in) #11512, failed dns resolves end up as oneshots. But failed oneshots are re-added as oneshots, so we need to make sure that we're not queuing these up forever after failed resolves.

  Rather than trying to differentiate, I think we should just not re-add failed oneshots and be done with it.

  Maybe @sipa can shed a light on what the original intention was.

Tree-SHA512: 2dfe35dabfb6354c315cf6f8ae42971765d36575e685662caae7ed8f9dea9472c6fb1fd5e62ec35301550b74b6613a54265e90fca2a6618544f78dacaac4d4fd

Author: laanwj

src/net.cpp

@@ -1682,8 +1682,7 @@ void CConnman::ProcessOneShot()
     CAddress addr;
     CSemaphoreGrant grant(*semOutbound, true);
     if (grant) {
-        if (!OpenNetworkConnection(addr, false, &grant, strDest.c_str(), true))
-            AddOneShot(strDest);
+        OpenNetworkConnection(addr, false, &grant, strDest.c_str(), true);
     }
 }
 
@@ -1953,29 +1952,29 @@ void CConnman::ThreadOpenAddedConnections()
 }
 
 // if successful, this moves the passed grant to the constructed node
-bool CConnman::OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot, bool fFeeler, bool manual_connection)
+void CConnman::OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound, const char *pszDest, bool fOneShot, bool fFeeler, bool manual_connection)
 {
     //
     // Initiate outbound network connection
     //
     if (interruptNet) {
-        return false;
+        return;
     }
     if (!fNetworkActive) {
-        return false;
+        return;
     }
     if (!pszDest) {
         if (IsLocal(addrConnect) ||
             FindNode((CNetAddr)addrConnect) || IsBanned(addrConnect) ||
             FindNode(addrConnect.ToStringIPPort()))
-            return false;
+            return;
     } else if (FindNode(std::string(pszDest)))
-        return false;
+        return;
 
     CNode* pnode = ConnectNode(addrConnect, pszDest, fCountFailure);
 
     if (!pnode)
-        return false;
+        return;
     if (grantOutbound)
         grantOutbound->MoveTo(pnode->grantOutbound);
     if (fOneShot)
@@ -1990,8 +1989,6 @@ bool CConnman::OpenNetworkConnection(const CAddress& addrConnect, bool fCountFai
         LOCK(cs_vNodes);
         vNodes.push_back(pnode);
     }
-
-    return true;
 }
 
 void CConnman::ThreadMessageHandler()

src/net.h

@@ -177,7 +177,7 @@ class CConnman
     void Interrupt();
     bool GetNetworkActive() const { return fNetworkActive; };
     void SetNetworkActive(bool active);
-    bool OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound = nullptr, const char *strDest = nullptr, bool fOneShot = false, bool fFeeler = false, bool manual_connection = false);
+    void OpenNetworkConnection(const CAddress& addrConnect, bool fCountFailure, CSemaphoreGrant *grantOutbound = nullptr, const char *strDest = nullptr, bool fOneShot = false, bool fFeeler = false, bool manual_connection = false);
     bool CheckIncomingNonce(uint64_t nonce);
 
     bool ForNode(NodeId id, std::function<bool(CNode* pnode)> func);