Boost C++ Libraries

Send a websocket pong control frame.

void
pong(
    ping_data const& payload);

This function is used to send a pong frame, which is usually sent automatically in response to a ping frame from the remote peer. The call blocks until one of the following conditions is true:

The algorithm, known as a composed operation, is implemented in terms of calls to the next layer's write_some function. WebSocket allows pong frames to be sent at any time, without first receiving a ping. An unsolicited pong sent in this fashion may indicate to the remote peer that the connection is still active.