Read challenge/response/additional data sent from the peer.
Use pending to determine the size of the data.
@param bytes written with up to size bytes of inbound data.
@param offset the offset in the array to begin writing at
@param size maximum number of bytes that bytes can accept.
@return The number of bytes written to bytes, or an error code if {@literal < 0}.
Read challenge/response/additional data sent from the peer.
Use pending to determine the size of the data.
@param bytes written with up to size bytes of inbound data. @param offset the offset in the array to begin writing at @param size maximum number of bytes that bytes can accept. @return The number of bytes written to bytes, or an error code if {@literal < 0}.