Request-Open-Station

Flow : DLC ------> NODE (link connection)

Header

Field Type Description
nxtqptr PTRBFHDR Pointer to next buffer header in a queue
hdreptr PTRBFELT Pointer to first buffer element if present
numelts CHAR Number of buffer elements
msgtype CHAR Message type: DLCSTAT (0x11)
srcl CHAR Source locality
srcp CHAR Source partner
srci INTEGER Source index
destl CHAR Destination locality
destp CHAR Destination partner
desti INTEGER Destination index
dshdr.dstype CHAR Status type: QOPNSTN (0x16)
dshdr.dsqual CHAR Station address on XID or mode-set command.
Set to 0x01 for 802.2
dshdr.dsmdset CHAR Rcv-Set-Mode flag
0x00 XID received
0x01 Mode set command received for example,
SNRM for SDLC
SABME for 802.2
QSM for X.25
Element
hdreptr–>elteptr PTRBFELT 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] XID-starting at first byte of received XID information field.
0x00 NULL XID received (n = 1) and signaling information present.

Optional Signaling Information

Field Description
dataru[s+n] Length of data, including this bytes
dataru[s+n+1] Type of data (not used at present)
dataru[s+n+2..s+m] Address or other identifier data. For example,
MAC address of remote station
X.25 address of remote station

Note