anchor.diff:                                    socket:recvfrom(Sock)
                             end,
                      InitState = #{domain => inet,
  +                                 proto  => udp,
  +                                 send   => Send,
  +                                 recv   => Recv},
  +                   ok = api_b_send_and_recv_udp(InitState)
  +           end).
  +
  +
  +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  +
  +%% Basically send and receive on an IPv4 UDP (dgram) socket using
  +%% sendto and recvfrom..
  +api_b_sendto_and_recvfrom_udpL(suite) ->
  +    [];
  +api_b_sendto_and_recvfrom_udpL(doc) ->
  +    [];
  +api_b_sendto_and_recvfrom_udpL(_Config) when is_list(_Config) ->
  +    ?TT(?SECS(5)),
  +    tc_try(api_b_sendto_and_recvfrom_udpL,
  +           fun() -> supports_unix_domain_socket() end,
  +           fun() ->
  +                   Send = fun(Sock, Data, Dest) ->
  +                                  socket:sendto(Sock, Data, Dest)
  +                          end,
  +                   Recv = fun(Sock) ->
  +                                  socket:recvfrom(Sock)
  +                          end,
  +                   InitState = #{domain => local,
  +                                 proto  => default,
                                    send   => Send,
                                    recv   => Recv},
                      ok = api_b_send_and_recv_udp(InitState)
  
positive.code:                                   socket:recv(Sock)
                            end,
                     InitState = #{domain => local,
                                   type   => stream,
                                   proto  => default,
                                   send   => Send,
                                   recv   => Recv},
  
negative.code:                                   socket:recv(Sock)
                            end,
                     InitState = #{domain => inet,
                                   proto  => tcp,
                                   send   => Send,
                                   recv   => Recv},
  