Skip privacy networks (on tx sends) that don't have outgoing connections

src/cryptonote_protocol/levin_notify.cpp

@@ -741,9 +741,14 @@ namespace levin
   notify::status notify::get_status() const noexcept
   {
     if (!zone_)
-      return {false, false};
+      return {false, false, false};
 
-    return {!zone_->noise.empty(), CRYPTONOTE_NOISE_CHANNELS <= zone_->connection_count};
+    // `connection_count` is only set when `!noise.empty()`.
+    const std::size_t connection_count = zone_->connection_count;
+    bool has_outgoing = connection_count;
+    if (zone_->noise.empty())
+      has_outgoing = zone_->p2p->get_out_connections_count();
+    return {!zone_->noise.empty(), CRYPTONOTE_NOISE_CHANNELS <= connection_count, has_outgoing};
   }
 
   void notify::new_out_connection()

src/cryptonote_protocol/levin_notify.h

@@ -75,7 +75,8 @@ namespace levin
     struct status
     {
       bool has_noise;
-      bool connections_filled;
+      bool connections_filled; //!< True when has zone has `CRYPTONOTE_NOISE_CHANNELS` outgoing noise channels
+      bool has_outgoing; //!< True when zone has outgoing connections
     };
 
     //! Construct an instance that cannot notify.

src/p2p/net_node.inl

@@ -2296,11 +2296,12 @@ namespace nodetool
       if (enet::zone::tor < network->first)
         break; // unknown network
 
-      if (network->second.m_connect)
+      const auto status = network->second.m_notifier.get_status();
+      if (network->second.m_connect && status.has_outgoing)
         return send(*network);
     }
 
-    // configuration should not allow this scenario
+    MWARNING("Unable to send " << txs.size() << " transaction(s): anonymity networks had no outgoing connections");
     return enet::zone::invalid;
   }
   //-----------------------------------------------------------------------------------

tests/unit_tests/levin.cpp

@@ -591,6 +591,7 @@ TEST_F(levin_notify, defaulted)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_FALSE(status.has_outgoing);
     }
     EXPECT_TRUE(notifier.send_txs({}, random_generator_(), cryptonote::relay_method::local));
 
@@ -611,6 +612,7 @@ TEST_F(levin_notify, fluff_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -658,6 +660,7 @@ TEST_F(levin_notify, stem_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -731,6 +734,7 @@ TEST_F(levin_notify, stem_no_outs_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_FALSE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -788,6 +792,7 @@ TEST_F(levin_notify, local_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -897,6 +902,7 @@ TEST_F(levin_notify, forward_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -970,6 +976,7 @@ TEST_F(levin_notify, block_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1000,6 +1007,7 @@ TEST_F(levin_notify, none_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1030,6 +1038,7 @@ TEST_F(levin_notify, fluff_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1077,6 +1086,7 @@ TEST_F(levin_notify, stem_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1145,6 +1155,7 @@ TEST_F(levin_notify, stem_no_outs_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_FALSE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1202,6 +1213,7 @@ TEST_F(levin_notify, local_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1303,6 +1315,7 @@ TEST_F(levin_notify, forward_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1371,6 +1384,7 @@ TEST_F(levin_notify, block_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1401,6 +1415,7 @@ TEST_F(levin_notify, none_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1431,6 +1446,7 @@ TEST_F(levin_notify, private_fluff_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1483,6 +1499,7 @@ TEST_F(levin_notify, private_stem_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1535,6 +1552,7 @@ TEST_F(levin_notify, private_local_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1587,6 +1605,7 @@ TEST_F(levin_notify, private_forward_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1639,6 +1658,7 @@ TEST_F(levin_notify, private_block_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1670,6 +1690,7 @@ TEST_F(levin_notify, private_none_without_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1700,6 +1721,7 @@ TEST_F(levin_notify, private_fluff_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1751,6 +1773,7 @@ TEST_F(levin_notify, private_stem_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1802,6 +1825,7 @@ TEST_F(levin_notify, private_local_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1853,6 +1877,7 @@ TEST_F(levin_notify, private_forward_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1904,6 +1929,7 @@ TEST_F(levin_notify, private_block_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1934,6 +1960,7 @@ TEST_F(levin_notify, private_none_with_padding)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -1966,6 +1993,7 @@ TEST_F(levin_notify, stem_mappings)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -2090,6 +2118,7 @@ TEST_F(levin_notify, fluff_multiple)
         const auto status = notifier.get_status();
         EXPECT_FALSE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
     notifier.new_out_connection();
     io_service_.poll();
@@ -2206,12 +2235,14 @@ TEST_F(levin_notify, noise)
         const auto status = notifier.get_status();
         EXPECT_TRUE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_FALSE(status.has_outgoing);
     }
     ASSERT_LT(0u, io_service_.poll());
     {
         const auto status = notifier.get_status();
         EXPECT_TRUE(status.has_noise);
         EXPECT_TRUE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
 
     notifier.run_stems();
@@ -2298,12 +2329,14 @@ TEST_F(levin_notify, noise_stem)
         const auto status = notifier.get_status();
         EXPECT_TRUE(status.has_noise);
         EXPECT_FALSE(status.connections_filled);
+        EXPECT_FALSE(status.has_outgoing);
     }
     ASSERT_LT(0u, io_service_.poll());
     {
         const auto status = notifier.get_status();
         EXPECT_TRUE(status.has_noise);
         EXPECT_TRUE(status.connections_filled);
+        EXPECT_TRUE(status.has_outgoing);
     }
 
     notifier.run_stems();