assemble_negotiation_parameters
int assemble_negotiation_parameters(connection_t *, ccb_t *, pdu_t *, pdu_t *);
assemble_negotiation_parameters(conn, tx_ccb, rx_pdu, NULL);
rc = assemble_negotiation_parameters(conn, tx_ccb, rx_pdu, tx_pdu);
rc = assemble_negotiation_parameters(conn, tx_ccb, rx_pdu, tx_pdu);