* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
* @(#)if_imp.h 7.1 (Berkeley) 6/4/86
* Structure of IMP 1822 long leader.
u_char dl_format
; /* leader format */ u_char dl_network
; /* src/dest network */ u_char dl_flags
; /* leader flags */ u_char dl_mtype
; /* message type */ u_char dl_htype
; /* handling type */ u_char dl_host
; /* host number */ u_short dl_imp
; /* imp field */ u_char dl_link
; /* link number */ u_char dl_subtype
; /* message subtype */ struct control_leader il_dl
;
#define il_format il_dl.dl_format
#define il_network il_dl.dl_network
#define il_flags il_dl.dl_flags
#define il_mtype il_dl.dl_mtype
#define il_htype il_dl.dl_htype
#define il_host il_dl.dl_host
#define il_imp il_dl.dl_imp
#define il_link il_dl.dl_link
#define il_subtype il_dl.dl_subtype
u_short il_length
; /* message length */#define IMP_DROPCNT 2 /* # of noops from imp to ignore */
/* insure things are even... */
#define IMPMTU ((8159 / NBBY) & ~01)
#define IMP_NFF 0xf /* 96-bit (new) format */
#define IMP_TRACE 0x8 /* trace message route */
#define IMP_DMASK 0x3 /* host going down mask */
* IMP-host message types.
#define IMPTYPE_DATA 0 /* data for protocol */
#define IMPTYPE_BADLEADER 1 /* leader error */
#define IMPTYPE_DOWN 2 /* imp going down */
#define IMPTYPE_NOOP 4 /* noop seen during initialization */
#define IMPTYPE_RFNM 5 /* request for new messages */
#define IMPTYPE_HOSTDEAD 6 /* host doesn't respond */
#define IMPTYPE_HOSTUNREACH 7 /* host unreachable */
#define IMPTYPE_BADDATA 8 /* data error */
#define IMPTYPE_INCOMPLETE 9 /* incomplete message, send rest */
#define IMPTYPE_RESET 10 /* reset complete */
/* non-blocking IMP interface */
#define IMPTYPE_RETRY 11 /* IMP refused, try again */
#define IMPTYPE_NOTIFY 12 /* IMP refused, will notify */
#define IMPTYPE_TRYING 13 /* IMP refused, still rexmt'ng */
#define IMPTYPE_READY 14 /* ready for next message */
#define IMPDOWN_GOING 0 /* 30 secs */
#define IMPDOWN_PM 1 /* hardware PM */
#define IMPDOWN_RELOAD 2 /* software reload */
#define IMPDOWN_RESTART 3 /* emergency restart */
* IMPTYPE_BADLEADER subtypes.
#define IMPLEADER_ERR 0 /* error flip-flop set */
#define IMPLEADER_SHORT 1 /* leader < 80 bits */
#define IMPLEADER_TYPE 2 /* illegal type field */
#define IMPLEADER_OPPOSITE 3 /* opposite leader type */
* IMPTYPE_HOSTDEAD subtypes.
#define IMPHOST_NORDY 1 /* ready-line negated */
#define IMPHOST_TARDY 2 /* tardy receiving mesgs */
#define IMPHOST_NOEXIST 3 /* NCC doesn't know host */
#define IMPHOST_IMPSOFT 4 /* IMP software won't allow mesgs */
#define IMPHOST_PM 5 /* host down for scheduled PM */
#define IMPHOST_HARDSCHED 6 /* " " " " hardware work */
#define IMPHOST_SOFTSCHED 7 /* " " " " software work */
#define IMPHOST_RESTART 8 /* host down for emergency restart */
#define IMPHOST_POWER 9 /* down because of power outage */
#define IMPHOST_BREAKPOINT 10 /* host stopped at a breakpoint */
#define IMPHOST_HARDWARE 11 /* hardware failure */
#define IMPHOST_NOTUP 12 /* host not scheduled to be up */
/* 13-14 currently unused */
#define IMPHOST_COMINGUP 15 /* host in process of coming up */
* IMPTYPE_HOSTUNREACH subtypes.
#define IMPREACH_IMP 0 /* destination IMP can't be reached */
#define IMPREACH_HOSTUP 1 /* destination host isn't up */
#define IMPREACH_LEADER 2 /* host doesn't support long leader */
#define IMPREACH_PROHIBITED 3 /* communication is prohibited */
* IMPTYPE_INCOMPLETE subtypes.
#define IMPCOMPLETE_SLOW 0 /* host didn't take data fast enough */
#define IMPCOMPLETE_TOOLONG 1 /* message was too long */
#define IMPCOMPLETE_TIMEOUT 2 /* mesg transmission time > 15 sec. */
#define IMPCOMPLETE_FAILURE 3 /* IMP/circuit failure */
#define IMPCOMPLETE_NOSPACE 4 /* no resources within 15 sec. */
#define IMPCOMPLETE_IMPIO 5 /* src IMP I/O failure during receipt */
* IMPTYPE_RETRY subtypes.
#define IMPRETRY_BUFFER 0 /* IMP buffer wasn't available */
#define IMPRETRY_BLOCK 1 /* connection block unavailable */
* Data structure shared between IMP protocol module and hardware
* interface driver. Used to allow layering of IMP routines on top
* of varying device drivers. NOTE: there's a possible problem
* with ambiguity in the ``unit'' definition which is implicitly
* shared by the both IMP and device code. If we have two IMPs,
* with each on top of a device of the same unit, things won't work.
* The assumption is if you've got multiple IMPs, then they all run
* on top of the same type of device, or they must have different units.
char ic_oactive
; /* output in progress */
int (*ic_init
)(); /* hardware init routine */
int (*ic_start
)(); /* hardware start output routine */
#define IMPS_DOWN 0 /* unavailable, don't use */
#define IMPS_GOINGDOWN 1 /* been told we go down soon */
#define IMPS_INIT 2 /* coming up */
#define IMPS_UP 3 /* ready to go */
#define IMPS_RESET 4 /* reset in progress */
#define IMPTV_DOWN (30*60) /* going down timer 30 secs */
char *impleaders
[IMPTYPE_READY
+1] = {
"DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD",
"HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY",
"NOTIFY", "TRYING", "READY"
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