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

connect (3 of 8 overloads)

Establishes a socket connection by trying each endpoint in a sequence.

template<
    typename Protocol,
    typename Executor,
    typename Iterator>
Iterator connect(
    basic_socket< Protocol, Executor > & s,
    Iterator begin,
    Iterator end);

This function attempts to connect a socket to one of a sequence of endpoints. It does this by repeated calls to the socket's connect member function, once for each endpoint in the sequence, until a connection is successfully established.

Parameters

s: The socket to be connected. If the socket is already open, it will be closed.
begin: An iterator pointing to the start of a sequence of endpoints.
end: An iterator pointing to the end of a sequence of endpoints.

Return Value

An iterator denoting the successfully connected endpoint.

Exceptions

boost::system::system_error: Thrown on failure. If the sequence is empty, the associated error_code is boost::asio::error::not_found. Otherwise, contains the error from the last connection attempt.

Example

tcp::resolver r(my_context);
tcp::resolver::query q("host", "service");
tcp::resolver::results_type e = r.resolve(q);
tcp::socket s(my_context);
boost::asio::connect(s, e.begin(), e.end());