anchor.diff:              fun() ->
                       Domain = inet6,
                       {ok, LocalAddr} = ?LIB:which_local_addr(Domain),
  -                    do_simple_sockaddr_send_recv(Domain, 0, LocalAddr, Config)
  +                    SockAddr = #{family   => Domain,
  +                                 addr     => LocalAddr,
  +                                 port     => 0},
  +                    do_simple_sockaddr_send_recv(SockAddr, Config)
               end).
   
   
  
positive.code:             end,
              fun() ->
                      Domain = inet6,
                      {ok, LinkLocalAddr} = ?LIB:which_link_local_addr(Domain),
                      {ok, [#{addr := #{scope_id := ScopeID}}|_]} =
                          net:getifaddrs(fun(#{addr := #{family := D,
                                                         addr   := A}}) ->
                                                 (D =:= Domain) andalso
                                                     (A =:= LinkLocalAddr);
                                            (_) ->
                                                 false
                                         end),
                      do_simple_sockaddr_send_recv(Domain, ScopeID,
                                                   LinkLocalAddr, Config)
              end).
  
  
  do_simple_sockaddr_send_recv(Domain, ScopeID, Addr, _) ->
      %% Create the server
      Self   = self(),
      ?P("~n      Domain:  ~p"
         "~n      Address: ~p"
         "~n      ScopeID: ~p", [Domain, Addr, ScopeID]),
      SockAddr = #{family   => Domain,
                   addr     => Addr,
                   port     => 0,
                   scope_id => ScopeID},
      ServerF = fun() ->
                        ?P("try create listen socket"),
                        LSock =
  
negative.code:      t_fdconnect,
       t_implicit_inet6,
       t_accept_inet6_tclass,
       t_simple_local_sockaddr_in_send_recv,
       t_simple_link_local_sockaddr_in_send_recv,
       t_simple_local_sockaddr_in6_send_recv,
       t_simple_link_local_sockaddr_in6_send_recv
      ].
  