cryptonote_protocol: misc fixes to the new sync algorithm

Fix sync wedge corner case:
It could happen if a connection went into standby mode, while
it was the one which had requested the next span, and that span
was still waiting for the data, and that peer is not on the
main chain. Other peers can then start asking for that data
again and again, but never get it as only that forked peer does.

And various other fixes

1 files changed, 2 insertions, 0 deletions

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;