[refactor] Restructure logic to check for addr relay.

We previously identified if we relay addresses to the connection by checking
for the existence of the m_addr_known data structure. With this commit, we
answer this question based on the connection type.

IsAddrRelayPeer() checked for the existence of the m_addr_known

src/net.cpp

@@ -2784,6 +2784,9 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
     hashContinue = uint256();
     if (conn_type_in != ConnectionType::BLOCK_RELAY) {
         m_tx_relay = MakeUnique<TxRelay>();
+    }
+
+    if (RelayAddrsWithConn()) {
         m_addr_known = MakeUnique<CRollingBloomFilter>(5000, 0.001);
     }
 

src/net.h

@@ -861,6 +861,12 @@ public:
         return m_conn_type == ConnectionType::INBOUND;
     }
 
+    /* Whether we send addr messages over this connection */
+    bool RelayAddrsWithConn() const
+    {
+        return m_conn_type != ConnectionType::BLOCK_RELAY;
+    }
+
     bool ExpectServicesFromConn() const {
         switch(m_conn_type) {
             case ConnectionType::INBOUND:
@@ -891,8 +897,6 @@ public:
     std::chrono::microseconds m_next_addr_send GUARDED_BY(cs_sendProcessing){0};
     std::chrono::microseconds m_next_local_addr_send GUARDED_BY(cs_sendProcessing){0};
 
-    bool IsAddrRelayPeer() const { return m_addr_known != nullptr; }
-
     // List of block ids we still have announce.
     // There is no final sorting before sending, as they are always sent immediately
     // and in the order requested.

src/net_processing.cpp

@@ -1531,7 +1531,7 @@ static void RelayAddress(const CAddress& addr, bool fReachable, const CConnman&
     assert(nRelayNodes <= best.size());
 
     auto sortfunc = [&best, &hasher, nRelayNodes](CNode* pnode) {
-        if (pnode->IsAddrRelayPeer()) {
+        if (pnode->RelayAddrsWithConn()) {
             uint64_t hashKey = CSipHasher(hasher).Write(pnode->GetId()).Finalize();
             for (unsigned int i = 0; i < nRelayNodes; i++) {
                  if (hashKey > best[i].first) {
@@ -2458,9 +2458,7 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
         UpdatePreferredDownload(pfrom, State(pfrom.GetId()));
         }
 
-        if (!pfrom.IsInboundConn() && pfrom.IsAddrRelayPeer())
+        if (!pfrom.IsInboundConn() && !pfrom.IsBlockOnlyConn()) {
-        {
-            // Advertise our address
             if (fListen && !::ChainstateActive().IsInitialBlockDownload())
             {
                 CAddress addr = GetLocalAddress(&pfrom.addr, pfrom.GetLocalServices());
@@ -2479,6 +2477,7 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
             // Get recent addresses
             m_connman.PushMessage(&pfrom, CNetMsgMaker(nSendVersion).Make(NetMsgType::GETADDR));
             pfrom.fGetAddr = true;
+
             m_connman.MarkAddressGood(pfrom.addr);
         }
 
@@ -2584,7 +2583,7 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
         std::vector<CAddress> vAddr;
         vRecv >> vAddr;
 
-        if (!pfrom.IsAddrRelayPeer()) {
+        if (!pfrom.RelayAddrsWithConn()) {
             return;
         }
         if (vAddr.size() > MAX_ADDR_TO_SEND)
@@ -3522,7 +3521,7 @@ void PeerLogicValidation::ProcessMessage(CNode& pfrom, const std::string& msg_ty
             LogPrint(BCLog::NET, "Ignoring \"getaddr\" from outbound connection. peer=%d\n", pfrom.GetId());
             return;
         }
-        if (!pfrom.IsAddrRelayPeer()) {
+        if (!pfrom.RelayAddrsWithConn()) {
             LogPrint(BCLog::NET, "Ignoring \"getaddr\" from block-relay-only connection. peer=%d\n", pfrom.GetId());
             return;
         }
@@ -4122,7 +4121,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
         int64_t nNow = GetTimeMicros();
         auto current_time = GetTime<std::chrono::microseconds>();
 
-        if (pto->IsAddrRelayPeer() && !::ChainstateActive().IsInitialBlockDownload() && pto->m_next_local_addr_send < current_time) {
+        if (pto->RelayAddrsWithConn() && !::ChainstateActive().IsInitialBlockDownload() && pto->m_next_local_addr_send < current_time) {
             AdvertiseLocal(pto);
             pto->m_next_local_addr_send = PoissonNextSend(current_time, AVG_LOCAL_ADDRESS_BROADCAST_INTERVAL);
         }
@@ -4130,7 +4129,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
         //
         // Message: addr
         //
-        if (pto->IsAddrRelayPeer() && pto->m_next_addr_send < current_time) {
+        if (pto->RelayAddrsWithConn() && pto->m_next_addr_send < current_time) {
             pto->m_next_addr_send = PoissonNextSend(current_time, AVG_ADDRESS_BROADCAST_INTERVAL);
             std::vector<CAddress> vAddr;
             vAddr.reserve(pto->vAddrToSend.size());

src/test/fuzz/net.cpp

@@ -147,7 +147,7 @@ void test_one_input(const std::vector<uint8_t>& buffer)
     const int ref_count = node.GetRefCount();
     assert(ref_count >= 0);
     (void)node.GetSendVersion();
-    (void)node.IsAddrRelayPeer();
+    (void)node.RelayAddrsWithConn();
 
     const NetPermissionFlags net_permission_flags = fuzzed_data_provider.ConsumeBool() ?
                                                         fuzzed_data_provider.PickValueInArray<NetPermissionFlags>({NetPermissionFlags::PF_NONE, NetPermissionFlags::PF_BLOOMFILTER, NetPermissionFlags::PF_RELAY, NetPermissionFlags::PF_FORCERELAY, NetPermissionFlags::PF_NOBAN, NetPermissionFlags::PF_MEMPOOL, NetPermissionFlags::PF_ISIMPLICIT, NetPermissionFlags::PF_ALL}) :