Do not use peer_id tracking method over i2p/tor

src/p2p/net_node.h

@@ -149,7 +149,7 @@ namespace nodetool
     {
       config_t()
         : m_net_config(),
-          m_peer_id(crypto::rand<uint64_t>()),
+          m_peer_id(1),
           m_support_flags(0)
       {}
 

src/p2p/net_node.inl

@@ -127,7 +127,9 @@ namespace nodetool
     if (storage)
       m_peerlist_storage = std::move(*storage);
 
-    m_network_zones[epee::net_utils::zone::public_].m_config.m_support_flags = P2P_SUPPORT_FLAGS;
+    network_zone& public_zone = m_network_zones[epee::net_utils::zone::public_];
+    public_zone.m_config.m_support_flags = P2P_SUPPORT_FLAGS;
+    public_zone.m_config.m_peer_id = crypto::rand<uint64_t>();
     m_first_connection_maker_call = true;
 
     CATCH_ENTRY_L0("node_server::init_config", false);
@@ -1057,11 +1059,12 @@ namespace nodetool
         pi = context.peer_id = rsp.node_data.peer_id;
         context.m_rpc_port = rsp.node_data.rpc_port;
         context.m_rpc_credits_per_hash = rsp.node_data.rpc_credits_per_hash;
-        network_zone& zone = m_network_zones.at(context.m_remote_address.get_zone());
+        const auto azone = context.m_remote_address.get_zone();
+        network_zone& zone = m_network_zones.at(azone);
         zone.m_peerlist.set_peer_just_seen(rsp.node_data.peer_id, context.m_remote_address, context.m_pruning_seed, context.m_rpc_port, context.m_rpc_credits_per_hash);
 
         // move
-        if(rsp.node_data.peer_id == zone.m_config.m_peer_id)
+        if(azone == epee::net_utils::zone::public_ && rsp.node_data.peer_id == zone.m_config.m_peer_id)
         {
           LOG_DEBUG_CC(context, "Connection to self detected, dropping connection");
           hsh_result = false;
@@ -1153,50 +1156,51 @@ namespace nodetool
   template<class t_payload_net_handler>
   bool node_server<t_payload_net_handler>::is_peer_used(const peerlist_entry& peer)
   {
-    for(const auto& zone : m_network_zones)
+    const auto zone = peer.adr.get_zone();
-      if(zone.second.m_config.m_peer_id == peer.id)
+    const auto server = m_network_zones.find(zone);
+    if (server == m_network_zones.end())
+      return false;
+
+    const bool is_public = (zone == epee::net_utils::zone::public_);
+    if(is_public && server->second.m_config.m_peer_id == peer.id)
       return true;//dont make connections to ourself
 
     bool used = false;
-    for(auto& zone : m_network_zones)
+    server->second.m_net_server.get_config_object().foreach_connection([&, is_public](const p2p_connection_context& cntxt)
     {
-      zone.second.m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
+      if((is_public && cntxt.peer_id == peer.id) || (!cntxt.m_is_income && peer.adr == cntxt.m_remote_address))
-      {
-        if(cntxt.peer_id == peer.id || (!cntxt.m_is_income && peer.adr == cntxt.m_remote_address))
       {
         used = true;
         return false;//stop enumerating
       }
       return true;
     });
-
+    return used;
-      if(used)
-        return true;
-    }
-    return false;
   }
   //-----------------------------------------------------------------------------------
   template<class t_payload_net_handler>
   bool node_server<t_payload_net_handler>::is_peer_used(const anchor_peerlist_entry& peer)
   {
-    for(auto& zone : m_network_zones) {
+    const auto zone = peer.adr.get_zone();
-      if(zone.second.m_config.m_peer_id == peer.id) {
+    const auto server = m_network_zones.find(zone);
+    if (server == m_network_zones.end())
+      return false;
+
+    const bool is_public = (zone == epee::net_utils::zone::public_);
+    if(is_public && server->second.m_config.m_peer_id == peer.id)
       return true;//dont make connections to ourself
-      }
+
     bool used = false;
-      zone.second.m_net_server.get_config_object().foreach_connection([&](const p2p_connection_context& cntxt)
+    server->second.m_net_server.get_config_object().foreach_connection([&, is_public](const p2p_connection_context& cntxt)
     {
-        if(cntxt.peer_id == peer.id || (!cntxt.m_is_income && peer.adr == cntxt.m_remote_address))
+      if((is_public && cntxt.peer_id == peer.id) || (!cntxt.m_is_income && peer.adr == cntxt.m_remote_address))
       {
         used = true;
         return false;//stop enumerating
       }
       return true;
     });
-      if (used)
+    return used;
-        return true;
-    }
-    return false;
   }
   //-----------------------------------------------------------------------------------
   template<class t_payload_net_handler>
@@ -1236,6 +1240,9 @@ namespace nodetool
     if (zone.m_connect == nullptr) // outgoing connections in zone not possible
       return false;
 
+    if (zone.m_our_address == na)
+      return false;
+
     if (zone.m_current_number_of_out_peers == zone.m_config.m_net_config.max_out_connection_count) // out peers limit
     {
       return false;
@@ -1514,6 +1521,9 @@ namespace nodetool
           peerid_to_string(pe.id) << " " << pe.adr.str() << ", pruning seed " << epee::string_tools::to_string_hex(pe.pruning_seed) <<
           " (stripe " << next_needed_pruning_stripe << " needed)");
 
+      if(zone.m_our_address == pe.adr)
+        continue;
+
       if(is_peer_used(pe)) {
         _note("Peer is used");
         continue;
@@ -2282,11 +2292,12 @@ namespace nodetool
       return 1;
     }
 
-    network_zone& zone = m_network_zones.at(context.m_remote_address.get_zone());
+    const auto azone = context.m_remote_address.get_zone();
+    network_zone& zone = m_network_zones.at(azone);
 
     // test only the remote end's zone, otherwise an attacker could connect to you on clearnet
     // and pass in a tor connection's peer id, and deduce the two are the same if you reject it
-    if(arg.node_data.peer_id == zone.m_config.m_peer_id)
+    if(azone == epee::net_utils::zone::public_ && arg.node_data.peer_id == zone.m_config.m_peer_id)
     {
       LOG_DEBUG_CC(context, "Connection to self detected, dropping connection");
       drop_connection(context);