Hi
I'm trying to create some code based on the code of the socket tutorial of the boost website.

The code to create a UDP socket which will send datagram is the following one :

boost::asio::io_service io_service;


udp::resolver resolver(io_service);

udp::resolver::query query(udp::v4(), argv[1], "daytime");

udp::endpoint receiver_endpoint = *resolver.resolve(query);


udp::socket socket(io_service);

socket.open(udp::v4());

But, to send something else than a Daytime request, I need to know what are the avalaible option to put instead of "daytime" in this line :


udp::resolver::query query(udp::v4(), argv[1], "daytime");

Unfortunately and as far sa I know, the documentation is quite light about that. The only that I found is this one : http://www.boost.org/doc/libs/1_37_0/doc/html/boost_asio/reference/ip__basic_resolver/query.html and it is quite empty.

Eventually, my goal is to use a specified port instead of a name of service.

Thanks in advance for the help.
Johan