HP X.25/9000 Programmer's Guide

Appendix A 115
X.25 Packet Formats
CALL REQUEST/INDICATION Packet
To write this field on an outgoing packet:
The subsystem computes this field from the x25addrstr returned in the
connect() system call.
Facilities (Length) Optional. Indicates the facilities used for this VC.
To read this field on an incoming packet:
Use ioctl(X25_RD_FACILITIES) to read this field.
To write this field on an outgoing packet:
Use ioctl(X25_WR_FACILITIES) to write this field.
Call User Data Optional. Contains a protocol ID and/or user defined data.
To read this field on an incoming packet:
The entire user data field including the protocol ID can be read using
ioctl(X25_RD_USER_DATA).
To write this field on an outgoing packet:
The entire user data field including the protocol ID can be written using
ioctl(X25_WR_USER_DATA).
36960-90061.bk Page 115 Friday, November 10, 2000 3:42 PM