ACC X.25 Protocol User's Guide

X.25 Status and Completion Messages
Unsolicited Status Messages
Appendix A142
The status code symbolic names are available to C application programs
by including the file /opt/acc/include/zcom/zx25status.h.
The statuses marked “**” are received by the application with the packet
data. These statuses are only received if the “notify application” option is
enabled for the virtual circuit terminal. The packet data layout is
described in /opt/acc/include/zcom/zcomx25.h for C as described in the
following diagrams.
The routine X25STAT may be called to convert any X.25 status codes to a
description. This is call compatible and may be used as a direct
replacement for the ZCOM Status call which is documented in the
Multiprotocol ACC Programmer’s Reference Guide.
The C structure for the packet data layout is as follows:
#define X25PKDATALEN 512 /* Max len of facility + user data */
typedef struct {
uint16 x25pkdbit; /* Deliv. confm bit: ZX25_TRUE, ZX25_FALSE */
uint16 x25pkcaus; /* Cause code */
uint16 x25pkdiag; /* Diagnostic code */
uint16 x25pkdflg; /* Use call addr: ZX25_TRUE, ZX25_FALSE */
uint8 x25pkcald[8]; /* Called X.121 address */
uint16 x25pkgflg; /* Use calling addr: ZX25_TRUE, ZX25_FALSE */
uint8 x25pkclng[8]; /* Calling X.121 address */
uint16 x25pkflen; /* Facility data byte length */
uint16 x25pkulen; /* User data byte length */