/* * 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. */ struct control_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 imp_leader { 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) /* * IMP-host flags */ #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 */ /* * IMPTYPE_DOWN subtypes. */ #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. */ struct impcb { char ic_oactive; /* output in progress */ int (*ic_init)(); /* hardware init routine */ int (*ic_start)(); /* hardware start output routine */ }; /* * State of an IMP. */ #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 */ #ifdef IMPLEADERS char *impleaders[IMPTYPE_READY+1] = { "DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD", "HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY", "NOTIFY", "TRYING", "READY" }; #endif