* @param cb A pointer to the function which will be called when the remote node sends data to the local node.
* @param data A pointer to a buffer containing data to already queue for sending.
* @param len The length of the data.
* @param cb A pointer to the function which will be called when the remote node sends data to the local node.
* @param data A pointer to a buffer containing data to already queue for sending.
* @param len The length of the data.