P-Type,Description,Reference
0x01,PREEMPTION_PRI,[RFC3181]
0x02,AUTH_USER,[RFC3182]
0x03,AUTH_APP,[RFC3182]
0x04,AUTH_SESSION,[RFC3520]
0x05,ADMISSION_PRI,[RFC6401]
0x06,APP_RESOURCE_PRI,[RFC6401]
0x07,REC_PROXY_CONTROL,[RFC5946]