Do not relay banned IP addresses

Author: sipa

src/net_processing.cpp

@@ -2022,6 +2022,7 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
             if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
                 addr.nTime = nNow - 5 * 24 * 60 * 60;
             pfrom->AddAddressKnown(addr);
+            if (g_banman->IsBanned(addr)) continue; // Do not process banned addresses beyond remembering we received them
             bool fReachable = IsReachable(addr);
             if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
             {
@@ -2912,8 +2913,11 @@ bool static ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStr
         pfrom->vAddrToSend.clear();
         std::vector<CAddress> vAddr = connman->GetAddresses();
         FastRandomContext insecure_rand;
-        for (const CAddress &addr : vAddr)
-            pfrom->PushAddress(addr, insecure_rand);
+        for (const CAddress &addr : vAddr) {
+            if (!g_banman->IsBanned(addr)) {
+                pfrom->PushAddress(addr, insecure_rand);
+            }
+        }
         return true;
     }