1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)if_imp.h 7.2 (Berkeley) 02/03/88 7 */ 8 9 /* 10 * Structure of IMP 1822 long leader. 11 */ 12 struct control_leader { 13 u_char dl_format; /* 1-8 leader format */ 14 u_char dl_network; /* 9-16 src/dest network */ 15 u_char dl_flags; /* 17-24 leader flags */ 16 u_char dl_mtype; /* 25-32 message type */ 17 u_char dl_htype; /* 33-40 handling type */ 18 u_char dl_host; /* 41-48 host number */ 19 u_short dl_imp; /* 49-64 imp field */ 20 u_char dl_link; /* 65-72 link number */ 21 u_char dl_subtype; /* 73-80 message subtype */ 22 }; 23 24 struct imp_leader { 25 struct control_leader il_dl; 26 #define il_format il_dl.dl_format 27 #define il_network il_dl.dl_network 28 #define il_flags il_dl.dl_flags 29 #define il_mtype il_dl.dl_mtype 30 #define il_htype il_dl.dl_htype 31 #define il_host il_dl.dl_host 32 #define il_imp il_dl.dl_imp 33 #define il_link il_dl.dl_link 34 #define il_subtype il_dl.dl_subtype 35 u_short il_length; /* message length */ 36 }; 37 38 #define IMP_NOOPCNT 3 /* # of noops to send imp on reset */ 39 /* insure things are even... */ 40 #define IMPMTU ((8159 / NBBY) & ~01) 41 #define IMP_RCVBUF ((8159 / NBBY + 2) & ~01) 42 43 /* 44 * IMP-host flags 45 */ 46 #define IMP_NFF 0xf /* 96-bit (new) format */ 47 #define IMP_TRACE 0x8 /* trace message route */ 48 49 /* 50 * IMP-host message types. 51 */ 52 #define IMPTYPE_DATA 0 /* data for protocol */ 53 #define IMPTYPE_BADLEADER 1 /* leader error */ 54 #define IMPTYPE_DOWN 2 /* imp going down */ 55 #define IMPTYPE_NOOP 4 /* noop seen during initialization */ 56 #define IMPTYPE_RFNM 5 /* request for new messages */ 57 #define IMPTYPE_HOSTDEAD 6 /* host doesn't respond */ 58 #define IMPTYPE_HOSTUNREACH 7 /* host unreachable */ 59 #define IMPTYPE_BADDATA 8 /* data error */ 60 #define IMPTYPE_INCOMPLETE 9 /* incomplete message, send rest */ 61 #define IMPTYPE_RESET 10 /* reset complete */ 62 /* non-blocking IMP interface */ 63 #define IMPTYPE_RETRY 11 /* IMP refused, try again */ 64 #define IMPTYPE_NOTIFY 12 /* IMP refused, will notify */ 65 #define IMPTYPE_TRYING 13 /* IMP refused, still rexmt'ng */ 66 #define IMPTYPE_READY 14 /* ready for next message */ 67 68 /* 69 * IMPTYPE_DOWN subtypes, in link number field. 70 */ 71 #define IMP_DMASK 0x3 /* host going down mask */ 72 #define IMPDOWN_GOING 0 /* 30 secs */ 73 #define IMPDOWN_PM 1 /* hardware PM */ 74 #define IMPDOWN_RELOAD 2 /* software reload */ 75 #define IMPDOWN_RESTART 3 /* emergency restart */ 76 #define IMPDOWN_WHENMASK 0x3c /* mask for "how soon" */ 77 #define IMPDOWN_WHENSHIFT 2 /* shift for "how soon" */ 78 #define IMPDOWN_WHENUNIT 5 /* unit for "how soon", 5 min. */ 79 80 #define IMPTV_DOWN 30 /* going down timer 30 secs */ 81 82 #ifdef IMPMESSAGES 83 /* 84 * Messages from IMP regarding why 85 * it's going down. 86 */ 87 char *impmessage[] = { 88 "in 30 seconds", 89 "for hardware PM", 90 "to reload software", 91 "for emergency reset" 92 }; 93 #endif 94 95 /* 96 * IMPTYPE_BADLEADER subtypes. 97 */ 98 #define IMPLEADER_ERR 0 /* error flip-flop set */ 99 #define IMPLEADER_SHORT 1 /* leader < 80 bits */ 100 #define IMPLEADER_TYPE 2 /* illegal type field */ 101 #define IMPLEADER_OPPOSITE 3 /* opposite leader type */ 102 103 /* 104 * IMPTYPE_HOSTDEAD subtypes. 105 */ 106 #define IMPHOST_NORDY 1 /* ready-line negated */ 107 #define IMPHOST_TARDY 2 /* tardy receiving mesgs */ 108 #define IMPHOST_NOEXIST 3 /* NCC doesn't know host */ 109 #define IMPHOST_IMPSOFT 4 /* IMP software won't allow mesgs */ 110 #define IMPHOST_PM 5 /* host down for scheduled PM */ 111 #define IMPHOST_HARDSCHED 6 /* " " " " hardware work */ 112 #define IMPHOST_SOFTSCHED 7 /* " " " " software work */ 113 #define IMPHOST_RESTART 8 /* host down for emergency restart */ 114 #define IMPHOST_POWER 9 /* down because of power outage */ 115 #define IMPHOST_BREAKPOINT 10 /* host stopped at a breakpoint */ 116 #define IMPHOST_HARDWARE 11 /* hardware failure */ 117 #define IMPHOST_NOTUP 12 /* host not scheduled to be up */ 118 /* 13-14 currently unused */ 119 #define IMPHOST_COMINGUP 15 /* host in process of coming up */ 120 121 /* 122 * IMPTYPE_HOSTUNREACH subtypes. 123 */ 124 #define IMPREACH_IMP 0 /* destination IMP can't be reached */ 125 #define IMPREACH_HOSTUP 1 /* destination host isn't up */ 126 #define IMPREACH_LEADER 2 /* host doesn't support long leader */ 127 #define IMPREACH_PROHIBITED 3 /* communication is prohibited */ 128 129 /* 130 * IMPTYPE_INCOMPLETE subtypes. 131 */ 132 #define IMPCOMPLETE_SLOW 0 /* host didn't take data fast enough */ 133 #define IMPCOMPLETE_TOOLONG 1 /* message was too long */ 134 #define IMPCOMPLETE_TIMEOUT 2 /* mesg transmission time > 15 sec. */ 135 #define IMPCOMPLETE_FAILURE 3 /* IMP/circuit failure */ 136 #define IMPCOMPLETE_NOSPACE 4 /* no resources within 15 sec. */ 137 #define IMPCOMPLETE_IMPIO 5 /* src IMP I/O failure during receipt */ 138 139 /* 140 * IMPTYPE_RETRY subtypes. 141 */ 142 #define IMPRETRY_BUFFER 0 /* IMP buffer wasn't available */ 143 #define IMPRETRY_BLOCK 1 /* connection block unavailable */ 144 145 #define RFNMTIMER (120*PR_SLOWHZ) /* time to wait for RFNM for msg. */ 146 /* 147 * Data structure shared between IMP protocol module and hardware 148 * interface driver. Used to allow layering of IMP routines on top 149 * of varying device drivers. 150 */ 151 struct impcb { 152 int ic_hwunit; /* H/W unit number */ 153 char *ic_hwname; /* H/W type name */ 154 char ic_oactive; /* output in progress */ 155 int (*ic_init)(); /* hardware init routine */ 156 int (*ic_start)(); /* hardware start output routine */ 157 int (*ic_stop)(); /* hardware "drop ready" routine */ 158 }; 159 160 /* 161 * IMP software status per interface. 162 * (partially shared with the hardware specific module) 163 * 164 * Each interface is referenced by a network interface structure, 165 * imp_if, which the routing code uses to locate the interface. 166 * This structure contains the output queue for the interface, its 167 * address, ... IMP specific structures used in connecting the 168 * IMP software modules to the hardware specific interface routines 169 * are stored here. The common structures are made visible to the 170 * interface driver by passing a pointer to the hardware routine 171 * at "attach" time. 172 */ 173 struct imp_softc { 174 struct ifnet imp_if; /* network visible interface */ 175 struct impcb imp_cb; /* hooks to hardware module */ 176 int imp_state; /* current state of IMP */ 177 int imp_dropcnt; /* used during initialization */ 178 u_long imp_lostrfnm; /* rfnm's timed out */ 179 u_long imp_badrfnm; /* rfnm/incompl after timeout/bogus */ 180 u_long imp_incomplete; /* incomplete's received */ 181 u_long imp_garbage; /* bad messages received */ 182 }; 183 struct imp_softc *impattach(); 184 185 /* 186 * State of an IMP. 187 */ 188 #define IMPS_DOWN 0 /* unavailable, host not ready */ 189 #define IMPS_WINIT 1 /* imp not ready, waiting for init */ 190 #define IMPS_INIT 2 /* coming up */ 191 #define IMPS_UP 3 /* ready to go */ 192 #define IMPS_GOINGDOWN 4 /* been told we go down soon */ 193 194 #define IMPS_RUNNING(s) ((s) >= IMPS_UP) /* ready for messages */ 195 #define IMPS_IMPREADY(s) ((s) >= IMPS_INIT) /* IMP ready line on */ 196 197 #ifdef IMPLEADERS 198 char *impleaders[IMPTYPE_READY+1] = { 199 "DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD", 200 "HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY", 201 "NOTIFY", "TRYING", "READY" 202 }; 203 #endif 204