Use a local FastRandomContext in a few more places in net

src/net.cpp

@@ -134,11 +134,12 @@ static std::vector<CAddress> convertSeed6(const std::vector<SeedSpec6> &vSeedsIn
     const int64_t nOneWeek = 7*24*60*60;
     std::vector<CAddress> vSeedsOut;
     vSeedsOut.reserve(vSeedsIn.size());
+    FastRandomContext rng;
     for (const auto& seed_in : vSeedsIn) {
         struct in6_addr ip;
         memcpy(&ip, seed_in.addr, sizeof(ip));
         CAddress addr(CService(ip, seed_in.port), GetDesirableServiceFlags(NODE_NONE));
-        addr.nTime = GetTime() - GetRand(nOneWeek) - nOneWeek;
+        addr.nTime = GetTime() - rng.randrange(nOneWeek) - nOneWeek;
         vSeedsOut.push_back(addr);
     }
     return vSeedsOut;
@@ -189,16 +190,16 @@ void AdvertiseLocal(CNode *pnode)
         // If discovery is enabled, sometimes give our peer the address it
         // tells us that it sees us as in case it has a better idea of our
         // address than we do.
+        FastRandomContext rng;
         if (IsPeerAddrLocalGood(pnode) && (!addrLocal.IsRoutable() ||
-             GetRand((GetnScore(addrLocal) > LOCAL_MANUAL) ? 8:2) == 0))
+             rng.randbits((GetnScore(addrLocal) > LOCAL_MANUAL) ? 3 : 1) == 0))
         {
             addrLocal.SetIP(pnode->GetAddrLocal());
         }
         if (addrLocal.IsRoutable() || gArgs.GetBoolArg("-addrmantest", false))
         {
             LogPrint(BCLog::NET, "AdvertiseLocal: advertising address %s\n", addrLocal.ToString());
-            FastRandomContext insecure_rand;
-            pnode->PushAddress(addrLocal, insecure_rand);
+            pnode->PushAddress(addrLocal, rng);
         }
     }
 }