er sequence <code class="computeroutput"><span class="identifier">mb</span></code>
                  specifies memory where the data should be placed. The <code class="computeroutput"><span class="identifier">read_some</span></code> operation shall always
                  fill a buffer in the sequence completely before proceeding to the
                  next.<br> <br> If successful, returns the number of bytes read
                  and sets <code class="computeroutput"><span class="identifier">ec</span><