The PU finite-state machines returned by the gfsm verb structure fsm_pu holds the current state of some of the finite-state machines used in the PU.
The fsm_lu is a structure with the following members:
hex | sess | SSCP-PU session status |
hex | im_rq_s | Immediate request mode send |
sess is used to record the secondary SSCP-PU half-session state. The following values are defined:
| P01_CPPU | Reset. | |
| P02_CPPU | An ACTPU has been received but not responded to. | |
| P03_CPPU | An ACTPU has been positively responded to. | |
| P04_CPPU | A DACTPU (not SON) has been received but not | |
responded to. | ||
| P05_CPPU | A DACTPU (SON) has been received but not | |
responded to. |
im_rq_s is used to enforce the immediate request mode protocol. The following states are maintained:
| P01_IMRQ | Not in chain, no definite response required. | |
| P02_IMRQ | Definite response required, CANCEL not sent. | |
| P03_IMRQ | In chain. | |
| P04_IMRQ | Response received while in chain. | |
| P05_IMRQ | Definite response to CANCEL required. |