Merge pull request #2311

df0cffed cryptonote_protocol: warn if we see a higher top version we expect (moneromooo-monero)
317ab21a cryptonote_protocol: less strict check on top version on connect (moneromooo-monero)
cc81a371 cryptonote_protocol: update target height when syncing too (moneromooo-monero)
e2ad372b cryptonote_protocol: simplify and remove unnecessary casts (moneromooo-monero)
727e67ca cryptonote_protocol: print peer top height along with its version (moneromooo-monero)
b5345ef4 crypto: use malloc instead of alloca (moneromooo-monero)
80794b31 thread_group: set thread size to THREAD_STACK_SIZE (moneromooo-monero)
5524bc31 print peer id in 0 padded hex for consistency (moneromooo-monero)
8f8cc09b contrib: add sync_info to rlwrap command set (moneromooo-monero)
70b8c6d7 cryptonote_protocol: misc fixes to the new sync algorithm (moneromooo-monero)

11 files changed, 166 insertions, 78 deletions

diff --git a/contrib/epee/include/string_tools.h b/contrib/epee/include/string_tools.h
index 258caa49e..ce7b2fb87 100644
--- a/contrib/epee/include/string_tools.h
+++ b/contrib/epee/include/string_tools.h
@@ -314,6 +314,18 @@ POP_WARNINGS
     return str;
   }
   //----------------------------------------------------------------------------
+  inline std::string pad_string(std::string s, size_t n, char c = ' ', bool prepend = false)
+  {
+    if (s.size() < n)
+    {
+      if (prepend)
+        s = std::string(n - s.size(), c) + s;
+      else
+        s.append(n - s.size(), c);
+    }
+    return s;
+  }
+  //----------------------------------------------------------------------------
   template<class t_pod_type>
   std::string pod_to_hex(const t_pod_type& s)
   {
diff --git a/contrib/rlwrap/monerocommands_bitmonerod.txt b/contrib/rlwrap/monerocommands_bitmonerod.txt
index 9572e40fe..c4f77b37d 100644
--- a/contrib/rlwrap/monerocommands_bitmonerod.txt
+++ b/contrib/rlwrap/monerocommands_bitmonerod.txt
@@ -32,4 +32,5 @@ status
 stop_daemon
 stop_mining
 stop_save_graph
+sync_info
 unban
diff --git a/src/common/thread_group.cpp b/src/common/thread_group.cpp
index 860d0b732..691a27a25 100644
--- a/src/common/thread_group.cpp
+++ b/src/common/thread_group.cpp
@@ -32,6 +32,7 @@
 #include <limits>
 #include <stdexcept>
 
+#include "cryptonote_config.h"
 #include "common/util.h"
 
 namespace tools
@@ -63,8 +64,10 @@ thread_group::data::data(std::size_t count)
   , has_work()
   , stop(false) {
   threads.reserve(count);
+  boost::thread::attributes attrs;
+  attrs.set_stack_size(THREAD_STACK_SIZE);
   while (count--) {
-    threads.push_back(boost::thread(&thread_group::data::run, this));
+    threads.push_back(boost::thread(attrs, boost::bind(&thread_group::data::run, this)));
   }
 }
 
diff --git a/src/crypto/crypto.cpp b/src/crypto/crypto.cpp
index 1c7adff3b..5fb670f87 100644
--- a/src/crypto/crypto.cpp
+++ b/src/crypto/crypto.cpp
@@ -36,18 +36,13 @@
 #include <memory>
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/lock_guard.hpp>
+#include <boost/shared_ptr.hpp>
 
 #include "common/varint.h"
 #include "warnings.h"
 #include "crypto.h"
 #include "hash.h"
 
-#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__DragonFly__)
- #include <alloca.h>
-#else
- #include <stdlib.h>
-#endif
-
 namespace crypto {
 
   using std::abort;
@@ -411,7 +406,9 @@ POP_WARNINGS
     ge_p3 image_unp;
     ge_dsmp image_pre;
     ec_scalar sum, k, h;
-    rs_comm *const buf = reinterpret_cast<rs_comm *>(alloca(rs_comm_size(pubs_count)));
+    boost::shared_ptr<rs_comm> buf(reinterpret_cast<rs_comm *>(malloc(rs_comm_size(pubs_count))), free);
+    if (!buf)
+      abort();
     assert(sec_index < pubs_count);
 #if !defined(NDEBUG)
     {
@@ -459,7 +456,7 @@ POP_WARNINGS
         sc_add(&sum, &sum, &sig[i].c);
       }
     }
-    hash_to_scalar(buf, rs_comm_size(pubs_count), h);
+    hash_to_scalar(buf.get(), rs_comm_size(pubs_count), h);
     sc_sub(&sig[sec_index].c, &h, &sum);
     sc_mulsub(&sig[sec_index].r, &sig[sec_index].c, &sec, &k);
   }
@@ -471,7 +468,9 @@ POP_WARNINGS
     ge_p3 image_unp;
     ge_dsmp image_pre;
     ec_scalar sum, h;
-    rs_comm *const buf = reinterpret_cast<rs_comm *>(alloca(rs_comm_size(pubs_count)));
+    boost::shared_ptr<rs_comm> buf(reinterpret_cast<rs_comm *>(malloc(rs_comm_size(pubs_count))), free);
+    if (!buf)
+      return false;
 #if !defined(NDEBUG)
     for (i = 0; i < pubs_count; i++) {
       assert(check_key(*pubs[i]));
@@ -499,7 +498,7 @@ POP_WARNINGS
       ge_tobytes(&buf->ab[i].b, &tmp2);
       sc_add(&sum, &sum, &sig[i].c);
     }
-    hash_to_scalar(buf, rs_comm_size(pubs_count), h);
+    hash_to_scalar(buf.get(), rs_comm_size(pubs_count), h);
     sc_sub(&h, &h, &sum);
     return sc_isnonzero(&h) == 0;
   }
diff --git a/src/cryptonote_protocol/block_queue.cpp b/src/cryptonote_protocol/block_queue.cpp
index 94d31404e..02a8e3ec2 100644
--- a/src/cryptonote_protocol/block_queue.cpp
+++ b/src/cryptonote_protocol/block_queue.cpp
@@ -52,8 +52,11 @@ namespace cryptonote
 void block_queue::add_blocks(uint64_t height, std::list<cryptonote::block_complete_entry> bcel, const boost::uuids::uuid &connection_id, float rate, size_t size)
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
-  remove_span(height);
+  std::list<crypto::hash> hashes;
+  bool has_hashes = remove_span(height, &hashes);
   blocks.insert(span(height, std::move(bcel), connection_id, rate, size));
+  if (has_hashes)
+    set_span_hashes(height, connection_id, hashes);
 }
 
 void block_queue::add_blocks(uint64_t height, uint64_t nblocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time)
@@ -92,17 +95,20 @@ void block_queue::flush_stale_spans(const std::set<boost::uuids::uuid> &live_con
   }
 }
 
-void block_queue::remove_span(uint64_t start_block_height)
+bool block_queue::remove_span(uint64_t start_block_height, std::list<crypto::hash> *hashes)
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
   for (block_map::iterator i = blocks.begin(); i != blocks.end(); ++i)
   {
     if (i->start_block_height == start_block_height)
     {
+      if (hashes)
+        *hashes = std::move(i->hashes);
       blocks.erase(i);
-      return;
+      return true;
     }
   }
+  return false;
 }
 
 void block_queue::remove_spans(const boost::uuids::uuid &connection_id, uint64_t start_block_height)
@@ -278,6 +284,22 @@ bool block_queue::get_next_span(uint64_t &height, std::list<cryptonote::block_co
   return false;
 }
 
+bool block_queue::has_next_span(const boost::uuids::uuid &connection_id, bool &filled) const
+{
+  boost::unique_lock<boost::recursive_mutex> lock(mutex);
+  if (blocks.empty())
+    return false;
+  block_map::const_iterator i = blocks.begin();
+  if (is_blockchain_placeholder(*i))
+    ++i;
+  if (i == blocks.end())
+    return false;
+  if (i->connection_id != connection_id)
+    return false;
+  filled = !i->blocks.empty();
+  return true;
+}
+
 size_t block_queue::get_data_size() const
 {
   boost::unique_lock<boost::recursive_mutex> lock(mutex);
diff --git a/src/cryptonote_protocol/block_queue.h b/src/cryptonote_protocol/block_queue.h
index fa1a0f217..13d4619bf 100644
--- a/src/cryptonote_protocol/block_queue.h
+++ b/src/cryptonote_protocol/block_queue.h
@@ -71,7 +71,7 @@ namespace cryptonote
     void add_blocks(uint64_t height, uint64_t nblocks, const boost::uuids::uuid &connection_id, boost::posix_time::ptime time = boost::date_time::min_date_time);
     void flush_spans(const boost::uuids::uuid &connection_id, bool all = false);
     void flush_stale_spans(const std::set<boost::uuids::uuid> &live_connections);
-    void remove_span(uint64_t start_block_height);
+    bool remove_span(uint64_t start_block_height, std::list<crypto::hash> *hashes = NULL);
     void remove_spans(const boost::uuids::uuid &connection_id, uint64_t start_block_height);
     uint64_t get_max_block_height() const;
     void print() const;
@@ -82,6 +82,7 @@ namespace cryptonote
     std::pair<uint64_t, uint64_t> get_next_span_if_scheduled(std::list<crypto::hash> &hashes, boost::uuids::uuid &connection_id, boost::posix_time::ptime &time) const;
     void set_span_hashes(uint64_t start_height, const boost::uuids::uuid &connection_id, std::list<crypto::hash> hashes);
     bool get_next_span(uint64_t &height, std::list<cryptonote::block_complete_entry> &bcel, boost::uuids::uuid &connection_id, bool filled = true) const;
+    bool has_next_span(const boost::uuids::uuid &connection_id, bool &filled) const;
     size_t get_data_size() const;
     size_t get_num_filled_spans_prefix() const;
     size_t get_num_filled_spans() const;
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.h b/src/cryptonote_protocol/cryptonote_protocol_handler.h
index d94747769..d54687e6a 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.h
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.h
@@ -111,6 +111,7 @@ namespace cryptonote
     std::list<connection_info> get_connections();
     const block_queue &get_block_queue() const { return m_block_queue; }
     void stop();
+    void on_connection_close(cryptonote_connection_context &context);
   private:
     //----------------- commands handlers ----------------------------------------------
     int handle_notify_new_block(int command, NOTIFY_NEW_BLOCK::request& arg, cryptonote_connection_context& context);
@@ -133,6 +134,7 @@ namespace cryptonote
     bool should_download_next_span(cryptonote_connection_context& context) const;
     void drop_connection(cryptonote_connection_context &context, bool add_fail, bool flush_all_spans);
     bool kick_idle_peers();
+    int try_add_next_blocks(cryptonote_connection_context &context);
 
     t_core& m_core;
 
diff --git a/src/cryptonote_protocol/cryptonote_protocol_handler.inl b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
index daefe88b7..f27a5d7b8 100644
--- a/src/cryptonote_protocol/cryptonote_protocol_handler.inl
+++ b/src/cryptonote_protocol/cryptonote_protocol_handler.inl
@@ -106,6 +106,11 @@ namespace cryptonote
       LOG_PRINT_CCONTEXT_L2("-->>NOTIFY_REQUEST_CHAIN: m_block_ids.size()=" << r.block_ids.size() );
       post_notify<NOTIFY_REQUEST_CHAIN>(r, context);
     }
+    else if(context.m_state == cryptonote_connection_context::state_standby)
+    {
+      context.m_state = cryptonote_connection_context::state_synchronizing;
+      try_add_next_blocks(context);
+    }
 
     return true;
   }
@@ -263,7 +268,9 @@ namespace cryptonote
     const uint8_t version = m_core.get_ideal_hard_fork_version(hshd.current_height - 1);
     if (version >= 6 && version != hshd.top_version)
     {
-      LOG_DEBUG_CC(context, "Ignoring due to wrong top version " << (unsigned)hshd.top_version << ", expected " << (unsigned)version);
+      if (version < hshd.top_version)
+        MCLOG_RED(el::Level::Warning, "global", context << " peer claims higher version that we think - we may be forked from the network and a software upgrade may be needed");
+      LOG_DEBUG_CC(context, "Ignoring due to wrong top version for block " << (hshd.current_height - 1) << ": " << (unsigned)hshd.top_version << ", expected " << (unsigned)version);
       return false;
     }
 
@@ -286,13 +293,14 @@ namespace cryptonote
     /* As I don't know if accessing hshd from core could be a good practice,
     I prefer pushing target height to the core at the same time it is pushed to the user.
     Nz. */
-    m_core.set_target_blockchain_height(static_cast<int64_t>(hshd.current_height));
+    m_core.set_target_blockchain_height((hshd.current_height));
     int64_t diff = static_cast<int64_t>(hshd.current_height) - static_cast<int64_t>(m_core.get_current_blockchain_height());
-	int64_t max_block_height = max(static_cast<int64_t>(hshd.current_height),static_cast<int64_t>(m_core.get_current_blockchain_height()));
-	int64_t last_block_v1 = m_core.get_testnet() ? 624633 : 1009826;
-	int64_t diff_v2 = max_block_height > last_block_v1 ? min(abs(diff), max_block_height - last_block_v1) : 0;
+    uint64_t abs_diff = std::abs(diff);
+    uint64_t max_block_height = max(hshd.current_height,m_core.get_current_blockchain_height());
+    uint64_t last_block_v1 = m_core.get_testnet() ? 624633 : 1009826;
+    uint64_t diff_v2 = max_block_height > last_block_v1 ? min(abs_diff, max_block_height - last_block_v1) : 0;
     MCLOG(is_inital ? el::Level::Info : el::Level::Debug, "global", context <<  "Sync data returned a new top block candidate: " << m_core.get_current_blockchain_height() << " -> " << hshd.current_height
-      << " [Your node is " << std::abs(diff) << " blocks (" << ((abs(diff) - diff_v2) / (24 * 60 * 60 / DIFFICULTY_TARGET_V1)) + (diff_v2 / (24 * 60 * 60 / DIFFICULTY_TARGET_V2)) << " days) "
+      << " [Your node is " << abs_diff << " blocks (" << ((abs_diff - diff_v2) / (24 * 60 * 60 / DIFFICULTY_TARGET_V1)) + (diff_v2 / (24 * 60 * 60 / DIFFICULTY_TARGET_V2)) << " days) "
       << (0 <= diff ? std::string("behind") : std::string("ahead"))
       << "] " << ENDL << "SYNCHRONIZATION started");
     }
@@ -309,7 +317,7 @@ namespace cryptonote
   bool t_cryptonote_protocol_handler<t_core>::get_payload_sync_data(CORE_SYNC_DATA& hshd)
   {
     m_core.get_blockchain_top(hshd.current_height, hshd.top_id);
-    hshd.top_version = m_core.get_hard_fork_version(hshd.current_height);
+    hshd.top_version = m_core.get_ideal_hard_fork_version(hshd.current_height);
     hshd.cumulative_difficulty = m_core.get_block_cumulative_difficulty(hshd.current_height);
     hshd.current_height +=1;
     return true;
@@ -819,8 +827,6 @@ namespace cryptonote
   {
     MLOG_P2P_MESSAGE("Received NOTIFY_RESPONSE_GET_OBJECTS (" << arg.blocks.size() << " blocks, " << arg.txs.size() << " txes)");
 
-    bool force_next_span = false;
-
     // calculate size of request
     size_t size = 0;
     for (const auto &element : arg.txs) size += element.size();
@@ -938,19 +944,34 @@ namespace cryptonote
 
       context.m_last_known_hash = cryptonote::get_blob_hash(arg.blocks.back().block);
 
-      if (m_core.get_test_drop_download() && m_core.get_test_drop_download_height()) { // DISCARD BLOCKS for testing
+      if (!m_core.get_test_drop_download() || !m_core.get_test_drop_download_height()) { // DISCARD BLOCKS for testing
+        return 1;
+      }
+    }
 
-        // We try to lock the sync lock. If we can, it means no other thread is
-        // currently adding blocks, so we do that for as long as we can from the
-        // block queue. Then, we go back to download.
-        const boost::unique_lock<boost::mutex> sync{m_sync_lock, boost::try_to_lock};
-        if (!sync.owns_lock())
-        {
-          MINFO("Failed to lock m_sync_lock, going back to download");
-          goto skip;
-        }
-        MDEBUG(context << " lock m_sync_lock, adding blocks to chain...");
+skip:
+    try_add_next_blocks(context);
+    return 1;
+  }
 
+  template<class t_core>
+  int t_cryptonote_protocol_handler<t_core>::try_add_next_blocks(cryptonote_connection_context& context)
+  {
+    bool force_next_span = false;
+
+    {
+      // We try to lock the sync lock. If we can, it means no other thread is
+      // currently adding blocks, so we do that for as long as we can from the
+      // block queue. Then, we go back to download.
+      const boost::unique_lock<boost::mutex> sync{m_sync_lock, boost::try_to_lock};
+      if (!sync.owns_lock())
+      {
+        MINFO("Failed to lock m_sync_lock, going back to download");
+        goto skip;
+      }
+      MDEBUG(context << " lock m_sync_lock, adding blocks to chain...");
+
+      {
         m_core.pause_mine();
         epee::misc_utils::auto_scope_leave_caller scope_exit_handler = epee::misc_utils::create_scope_leave_handler(
           boost::bind(&t_core::resume_mine, &m_core));
@@ -984,21 +1005,15 @@ namespace cryptonote
             //  - later in an alt chain
             //  - orphan
             // if it was requested, then it'll be resolved later, otherwise it's an orphan
-            bool parent_requested = false;
-	    m_p2p->for_each_connection([&](cryptonote_connection_context& context, nodetool::peerid_type peer_id, uint32_t support_flags)->bool{
-	      if (context.m_requested_objects.find(new_block.prev_id) != context.m_requested_objects.end())
-              {
-                parent_requested = true;
-                return false;
-              }
-	      return true;
-	    });
+            bool parent_requested = m_block_queue.requested(new_block.prev_id);
             if (!parent_requested)
             {
-              LOG_ERROR_CCONTEXT("Got block with unknown parent which was not requested - dropping connection");
-              // in case the peer had dropped beforehand, remove the span anyway so other threads can wake up and get it
-              m_block_queue.remove_spans(span_connection_id, start_height);
-              return 1;
+              // this can happen if a connection was sicced onto a late span, if it did not have those blocks,
+              // since we don't know that at the sic time
+              LOG_ERROR_CCONTEXT("Got block with unknown parent which was not requested - querying block hashes");
+              context.m_needed_objects.clear();
+              context.m_last_response_height = 0;
+              goto skip;
             }
 
             // parent was requested, so we wait for it to be retrieved
@@ -1007,6 +1022,7 @@ namespace cryptonote
           }
 
           const boost::posix_time::ptime start = boost::posix_time::microsec_clock::universal_time();
+          context.m_last_request_time = start;
 
           m_core.prepare_handle_incoming_blocks(blocks);
 
@@ -1108,7 +1124,7 @@ namespace cryptonote
                 << timing_message);
           }
         }
-      } // if not DISCARD BLOCK
+      }
 
       if (should_download_next_span(context))
       {
@@ -1179,9 +1195,17 @@ skip:
     std::list<crypto::hash> hashes;
     boost::uuids::uuid span_connection_id;
     boost::posix_time::ptime request_time;
-    std::pair<uint64_t, uint64_t> span = m_block_queue.get_next_span_if_scheduled(hashes, span_connection_id, request_time);
+    std::pair<uint64_t, uint64_t> span;
+
+    span = m_block_queue.get_start_gap_span();
+    if (span.second > 0)
+    {
+      MDEBUG(context << " we should download it as there is a gap");
+      return true;
+    }
 
     // if the next span is not scheduled (or there is none)
+    span = m_block_queue.get_next_span_if_scheduled(hashes, span_connection_id, request_time);
     if (span.second == 0)
     {
       // we might be in a weird case where there is a filled next span,
@@ -1270,6 +1294,17 @@ skip:
           first = false;
           context.m_state = cryptonote_connection_context::state_standby;
         }
+
+        // this needs doing after we went to standby, so the callback knows what to do
+        bool filled;
+        if (m_block_queue.has_next_span(context.m_connection_id, filled) && !filled)
+        {
+          MDEBUG(context << " we have the next span, and it is scheduled, resuming");
+          ++context.m_callback_request_count;
+          m_p2p->request_callback(context);
+          return 1;
+        }
+
         for (size_t n = 0; n < 50; ++n)
         {
           if (m_stopping)
@@ -1289,9 +1324,8 @@ skip:
       size_t count = 0;
       const size_t count_limit = m_core.get_block_sync_size(m_core.get_current_blockchain_height());
       std::pair<uint64_t, uint64_t> span = std::make_pair(0, 0);
-      if (force_next_span)
       {
-        MDEBUG(context << " force_next_span is true, trying next span");
+        MDEBUG(context << " checking for gap");
         span = m_block_queue.get_start_gap_span();
         if (span.second > 0)
         {
@@ -1311,6 +1345,9 @@ skip:
           }
           MDEBUG(context << " we have the hashes for this gap");
         }
+      }
+      if (force_next_span)
+      {
         if (span.second == 0)
         {
           std::list<crypto::hash> hashes;
@@ -1360,7 +1397,12 @@ skip:
           for (const auto &hash: hashes)
           {
             req.blocks.push_back(hash);
+            ++count;
             context.m_requested_objects.insert(hash);
+            // that's atrocious O(n) wise, but this is rare
+            auto i = std::find(context.m_needed_objects.begin(), context.m_needed_objects.end(), hash);
+            if (i != context.m_needed_objects.end())
+              context.m_needed_objects.erase(i);
           }
         }
       }
@@ -1384,14 +1426,12 @@ skip:
             return false;
           }
 
-          std::list<crypto::hash> hashes;
           auto it = context.m_needed_objects.begin();
           for (size_t n = 0; n < span.second; ++n)
           {
             req.blocks.push_back(*it);
             ++count;
             context.m_requested_objects.insert(*it);
-            hashes.push_back(*it);
             auto j = it++;
             context.m_needed_objects.erase(j);
           }
@@ -1399,7 +1439,7 @@ skip:
 
         context.m_last_request_time = boost::posix_time::microsec_clock::universal_time();
         LOG_PRINT_CCONTEXT_L1("-->>NOTIFY_REQUEST_GET_OBJECTS: blocks.size()=" << req.blocks.size() << ", txs.size()=" << req.txs.size()
-            << "requested blocks count=" << count << " / " << count_limit << " from " << span.first);
+            << "requested blocks count=" << count << " / " << count_limit << " from " << span.first << ", first hash " << req.blocks.front());
         //epee::net_utils::network_throttle_manager::get_global_throttle_inreq().logger_handle_net("log/dr-monero/net/req-all.data", sec, get_avg_block_size());
 
         post_notify<NOTIFY_REQUEST_GET_OBJECTS>(req, context);
@@ -1523,6 +1563,10 @@ skip:
       drop_connection(context, false, false);
       return 1;
     }
+
+    if (arg.total_height > m_core.get_target_blockchain_height())
+      m_core.set_target_blockchain_height(arg.total_height);
+
     return 1;
   }
   //------------------------------------------------------------------------------------------------------------------------
@@ -1582,8 +1626,15 @@ skip:
   {
     if (add_fail)
       m_p2p->add_host_fail(context.m_remote_address);
+
     m_p2p->drop_connection(context);
 
+    m_block_queue.flush_spans(context.m_connection_id, flush_all_spans);
+  }
+  //------------------------------------------------------------------------------------------------------------------------
+  template<class t_core>
+  void t_cryptonote_protocol_handler<t_core>::on_connection_close(cryptonote_connection_context &context)
+  {
     uint64_t target = 0;
     m_p2p->for_each_connection([&](const connection_context& cntxt, nodetool::peerid_type peer_id, uint32_t support_flags) {
       if (cntxt.m_state >= cryptonote_connection_context::state_synchronizing && cntxt.m_connection_id != context.m_connection_id)
@@ -1597,7 +1648,7 @@ skip:
       m_core.set_target_blockchain_height(target);
     }
 
-    m_block_queue.flush_spans(context.m_connection_id, flush_all_spans);
+    m_block_queue.flush_spans(context.m_connection_id, false);
   }
 
   //------------------------------------------------------------------------------------------------------------------------
diff --git a/src/daemon/rpc_command_executor.cpp b/src/daemon/rpc_command_executor.cpp
index 0dca06828..fde1749d2 100644
--- a/src/daemon/rpc_command_executor.cpp
+++ b/src/daemon/rpc_command_executor.cpp
@@ -113,18 +113,6 @@ namespace {
       return base;
     return base + " -- " + status;
   }
-
-  std::string pad(std::string s, size_t n, char c = ' ', bool prepend = false)
-  {
-    if (s.size() < n)
-    {
-      if (prepend)
-        s = std::string(n - s.size(), c) + s;
-      else
-        s.append(n - s.size(), c);
-    }
-    return s;
-  }
 }
 
 t_rpc_command_executor::t_rpc_command_executor(
@@ -497,7 +485,7 @@ bool t_rpc_command_executor::print_connections() {
     tools::msg_writer() 
      //<< std::setw(30) << std::left << in_out
      << std::setw(30) << std::left << address
-     << std::setw(20) << pad(info.peer_id, 16, '0', true)
+     << std::setw(20) << epee::string_tools::pad_string(info.peer_id, 16, '0', true)
      << std::setw(20) << info.support_flags
      << std::setw(30) << std::to_string(info.recv_count) + "("  + std::to_string(info.recv_idle_time) + ")/" + std::to_string(info.send_count) + "(" + std::to_string(info.send_idle_time) + ")"
      << std::setw(25) << info.state
@@ -1766,12 +1754,12 @@ bool t_rpc_command_executor::sync_info()
     tools::success_msg_writer() << std::to_string(res.peers.size()) << " peers";
     for (const auto &p: res.peers)
     {
-      std::string address = pad(p.info.address, 24);
+      std::string address = epee::string_tools::pad_string(p.info.address, 24);
       uint64_t nblocks = 0, size = 0;
       for (const auto &s: res.spans)
         if (s.rate > 0.0f && s.connection_id == p.info.connection_id)
           nblocks += s.nblocks, size += s.size;
-      tools::success_msg_writer() << address << "  " << pad(p.info.peer_id, 16, '0', true) << "  " << p.info.height << "  "  << p.info.current_download << " kB/s, " << nblocks << " blocks / " << size/1e6 << " MB queued";
+      tools::success_msg_writer() << address << "  " << epee::string_tools::pad_string(p.info.peer_id, 16, '0', true) << "  " << p.info.height << "  "  << p.info.current_download << " kB/s, " << nblocks << " blocks / " << size/1e6 << " MB queued";
     }
 
     uint64_t total_size = 0;
@@ -1780,7 +1768,7 @@ bool t_rpc_command_executor::sync_info()
     tools::success_msg_writer() << std::to_string(res.spans.size()) << " spans, " << total_size/1e6 << " MB";
     for (const auto &s: res.spans)
     {
-      std::string address = pad(s.remote_address, 24);
+      std::string address = epee::string_tools::pad_string(s.remote_address, 24);
       if (s.size == 0)
       {
         tools::success_msg_writer() << address << "  " << s.nblocks << " (" << s.start_block_height << " - " << (s.start_block_height + s.nblocks - 1) << ")  -";
diff --git a/src/p2p/net_node.inl b/src/p2p/net_node.inl
index e179fc14f..889cfaf9d 100644
--- a/src/p2p/net_node.inl
+++ b/src/p2p/net_node.inl
@@ -1077,7 +1077,7 @@ namespace nodetool
   bool node_server<t_payload_net_handler>::make_new_connection_from_anchor_peerlist(const std::vector<anchor_peerlist_entry>& anchor_peerlist)
   {
     for (const auto& pe: anchor_peerlist) {
-      _note("Considering connecting (out) to peer: " << pe.id << " " << pe.adr.str());
+      _note("Considering connecting (out) to peer: " << peerid_type(pe.id) << " " << pe.adr.str());
 
       if(is_peer_used(pe)) {
         _note("Peer is used");
@@ -1092,7 +1092,7 @@ namespace nodetool
         continue;
       }
 
-      MDEBUG("Selected peer: " << pe.id << " " << pe.adr.str()
+      MDEBUG("Selected peer: " << peerid_to_string(pe.id) << " " << pe.adr.str()
                                << "[peer_type=" << anchor
                                << "] first_seen: " << epee::misc_utils::get_time_interval_string(time(NULL) - pe.first_seen));
 
@@ -1145,7 +1145,7 @@ namespace nodetool
 
       ++try_count;
 
-      _note("Considering connecting (out) to peer: " << pe.id << " " << pe.adr.str());
+      _note("Considering connecting (out) to peer: " << peerid_to_string(pe.id) << " " << pe.adr.str());
 
       if(is_peer_used(pe)) {
         _note("Peer is used");
@@ -1158,7 +1158,7 @@ namespace nodetool
       if(is_addr_recently_failed(pe.adr))
         continue;
 
-      MDEBUG("Selected peer: " << pe.id << " " << pe.adr.str()
+      MDEBUG("Selected peer: " << peerid_to_string(pe.id) << " " << pe.adr.str()
                     << "[peer_list=" << (use_white_list ? white : gray)
                     << "] last_seen: " << (pe.last_seen ? epee::misc_utils::get_time_interval_string(time(NULL) - pe.last_seen) : "never"));
 
@@ -1795,6 +1795,8 @@ namespace nodetool
       m_peerlist.remove_from_peer_anchor(na);
     }
 
+    m_payload_handler.on_connection_close(context);
+
     MINFO("["<< epee::net_utils::print_connection_context(context) << "] CLOSE CONNECTION");
   }
 
@@ -1960,14 +1962,14 @@ namespace nodetool
     if (!success) {
       m_peerlist.remove_from_peer_gray(pe);
 
-      LOG_PRINT_L2("PEER EVICTED FROM GRAY PEER LIST IP address: " << pe.adr.host_str() << " Peer ID: " << std::hex << pe.id);
+      LOG_PRINT_L2("PEER EVICTED FROM GRAY PEER LIST IP address: " << pe.adr.host_str() << " Peer ID: " << peerid_type(pe.id));
 
       return true;
     }
 
     m_peerlist.set_peer_just_seen(pe.id, pe.adr);
 
-    LOG_PRINT_L2("PEER PROMOTED TO WHITE PEER LIST IP address: " << pe.adr.host_str() << " Peer ID: " << std::hex << pe.id);
+    LOG_PRINT_L2("PEER PROMOTED TO WHITE PEER LIST IP address: " << pe.adr.host_str() << " Peer ID: " << peerid_type(pe.id));
 
     return true;
   }
diff --git a/src/p2p/p2p_protocol_defs.h b/src/p2p/p2p_protocol_defs.h
index f38615def..f2b2cd1da 100644
--- a/src/p2p/p2p_protocol_defs.h
+++ b/src/p2p/p2p_protocol_defs.h
@@ -44,6 +44,13 @@ namespace nodetool
   typedef boost::uuids::uuid uuid;
   typedef uint64_t peerid_type;
 
+  static inline std::string peerid_to_string(peerid_type peer_id)
+  {
+    std::ostringstream s;
+    s << std::hex << peer_id;
+    return epee::string_tools::pad_string(s.str(), 16, '0', true);
+  }
+
 #pragma pack (push, 1)
   
   struct network_address_old