Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Inherited from basic_socket.

Open the socket using the specified protocol.

void open(
    const protocol_type & protocol = protocol_type());

This function opens the socket so that it will use the specified protocol.

boost::asio::ip::tcp::socket socket(my_context);
socket.open(boost::asio::ip::tcp::v4());