p2p: remove blocked addresses/hosts from peerlist

contrib/epee/include/net/net_utils_base.h

@@ -236,6 +236,7 @@ namespace net_utils
 			virtual address_type get_type_id() const = 0;
 			virtual zone get_zone() const = 0;
 			virtual bool is_blockable() const = 0;
+			virtual std::uint16_t port() const = 0;
 		};
 
 		template<typename T>
@@ -266,6 +267,7 @@ namespace net_utils
 			virtual address_type get_type_id() const override { return value.get_type_id(); }
 			virtual zone get_zone() const override { return value.get_zone(); }
 			virtual bool is_blockable() const override { return value.is_blockable(); }
+			virtual std::uint16_t port() const override { return value.port(); }
 		};
 
 		std::shared_ptr<interface> self;
@@ -312,6 +314,7 @@ namespace net_utils
 		address_type get_type_id() const { return self ? self->get_type_id() : address_type::invalid; }
 		zone get_zone() const { return self ? self->get_zone() : zone::invalid; }
 		bool is_blockable() const { return self ? self->is_blockable() : false; }
+		std::uint16_t port() const { return self ? self->port() : 0; }
 		template<typename Type> const Type &as() const { return as_mutable<const Type>(); }
 
 		BEGIN_KV_SERIALIZE_MAP()

src/p2p/net_node.inl

@@ -269,9 +269,17 @@ namespace nodetool
 
       peerlist_entry pe{};
       pe.adr = addr;
-      zone.second.m_peerlist.remove_from_peer_white(pe);
-      zone.second.m_peerlist.remove_from_peer_gray(pe);
-      zone.second.m_peerlist.remove_from_peer_anchor(addr);
+      if (addr.port() == 0)
+      {
+        zone.second.m_peerlist.evict_host_from_peerlist(true, pe);
+        zone.second.m_peerlist.evict_host_from_peerlist(false, pe);
+      }
+      else
+      {
+        zone.second.m_peerlist.remove_from_peer_white(pe);
+        zone.second.m_peerlist.remove_from_peer_gray(pe);
+        zone.second.m_peerlist.remove_from_peer_anchor(addr);
+     }
 
       for (const auto &c: conns)
         zone.second.m_net_server.get_config_object().close(c);
@@ -331,6 +339,13 @@ namespace nodetool
       for (const auto &c: conns)
         zone.second.m_net_server.get_config_object().close(c);
 
+      for (int i = 0; i < 2; ++i)
+        zone.second.m_peerlist.filter(i == 0, [&subnet](const peerlist_entry &pe){
+          if (pe.adr.get_type_id() != epee::net_utils::ipv4_network_address::get_type_id())
+            return false;
+          return subnet.matches(pe.adr.as<const epee::net_utils::ipv4_network_address>());
+        });
+
       conns.clear();
     }
 

src/p2p/net_peerlist.cpp

@@ -289,17 +289,9 @@ namespace nodetool
     copy_peers(peers.anchor, m_peers_anchor.get<by_addr>());
   }
 
-  void peerlist_manager::evict_host_from_white_peerlist(const peerlist_entry& pr)
+  void peerlist_manager::evict_host_from_peerlist(bool use_white, const peerlist_entry& pr)
   {
-    peers_indexed::index<by_time>::type& sorted_index=m_peers_white.get<by_time>();
-    auto i = sorted_index.begin();
-    while (i != sorted_index.end())
-    {
-      if (i->adr.is_same_host(pr.adr))
-        i = sorted_index.erase(i);
-      else
-        ++i;
-    }
+    filter(use_white, [&pr](const peerlist_entry& pe){ return pe.adr.is_same_host(pr.adr); });
   }
 }
 

src/p2p/net_peerlist.h

@@ -109,7 +109,7 @@ namespace nodetool
     bool get_white_peer_by_index(peerlist_entry& p, size_t i);
     bool get_gray_peer_by_index(peerlist_entry& p, size_t i);
     template<typename F> bool foreach(bool white, const F &f);
-    void evict_host_from_white_peerlist(const peerlist_entry& pr);
+    void evict_host_from_peerlist(bool white, const peerlist_entry& pr);
     bool append_with_peer_white(const peerlist_entry& pr);
     bool append_with_peer_gray(const peerlist_entry& pr);
     bool append_with_peer_anchor(const anchor_peerlist_entry& ple);
@@ -120,6 +120,7 @@ namespace nodetool
     bool get_and_empty_anchor_peerlist(std::vector<anchor_peerlist_entry>& apl);
     bool remove_from_peer_anchor(const epee::net_utils::network_address& addr);
     bool remove_from_peer_white(const peerlist_entry& pe);
+    template<typename F> size_t filter(bool white, const F &f); // f returns true: drop, false: keep
     
   private:
     struct by_time{};
@@ -346,7 +347,7 @@ namespace nodetool
     if(by_addr_it_wt == m_peers_white.get<by_addr>().end())
     {
       //put new record into white list
-      evict_host_from_white_peerlist(ple);
+      evict_host_from_peerlist(true, ple);
       m_peers_white.insert(ple);
       trim_white_peerlist();
     }else
@@ -519,5 +520,26 @@ namespace nodetool
     CATCH_ENTRY_L0("peerlist_manager::remove_from_peer_anchor()", false);
   }
   //--------------------------------------------------------------------------------------------------
+  template<typename F> size_t peerlist_manager::filter(bool white, const F &f)
+  {
+    size_t filtered = 0;
+    TRY_ENTRY();
+    CRITICAL_REGION_LOCAL(m_peerlist_lock);
+    peers_indexed::index<by_addr>::type& sorted_index = white ? m_peers_gray.get<by_addr>() : m_peers_white.get<by_addr>();
+    auto i = sorted_index.begin();
+    while (i != sorted_index.end())
+    {
+      if (f(*i))
+      {
+        i = sorted_index.erase(i);
+        ++filtered;
+      }
+      else
+        ++i;
+    }
+    CATCH_ENTRY_L0("peerlist_manager::filter()", filtered);
+    return filtered;
+  }
+  //--------------------------------------------------------------------------------------------------
 }
 

tests/unit_tests/epee_utils.cpp

@@ -1503,6 +1503,7 @@ TEST(NetUtils, NetworkAddress)
     constexpr static epee::net_utils::address_type get_type_id() noexcept { return epee::net_utils::address_type(-1); }
     constexpr static epee::net_utils::zone get_zone() noexcept { return epee::net_utils::zone::invalid; }
     constexpr static bool is_blockable() noexcept { return false; }
+    constexpr static uint16_t port() { return 0; }
   };
 
   const epee::net_utils::network_address empty;