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

This is the documentation for an old version of boost. Click here for the latest Boost documentation.
ip::basic_endpoint::port (2 of 2 overloads)

Set the port associated with the endpoint. The port number is always in the host's byte order.

void port(
    unsigned short port_num);