DLC-Data

Flow : DLC <------> NODE

Header

Field Type Description
nxtqptr PPTRBFHDR Pointer to next buffer header in a queue
hdreptr PPTRBFELT Pointer to first buffer element
numelts CCHAR Number of buffer elements
msgtype CCHAR Message type: DLCDATA (0x10)
srcl CCHAR Source locality
srcp CCHAR Source partner
srci INTEGER Source index
destl CCHAR Destination locality
destp CCHAR Destination partner
desti INTEGER Destination index
ddhdr.ddth01 CCHAR[6] Transmission header

Element

Field Type Description
hdreptr–>elteptr PPTRBFELT Pointer to next buffer element: (NULL is only one element)
hdreptr–>startd INTEGER Index to start of data in this buffer element's data array: 1
hdreptr–>endd INTEGER Index to last byte of data in this buffer element's data array
hdreptr–>dataru CHAR[SNANBEDA] Defined as follows, where s = startd–1
dataru[s..s+n–1] SNA request header (RH) if present, and request unit (RU)