1 /* 2 * Copyright (c) 1982,1986,1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 * 12 * @(#)if_imp.h 7.4 (Berkeley) 05/06/88 13 */ 14 15 /* 16 * Structure of IMP 1822 long leader. 17 */ 18 struct control_leader { 19 u_char dl_format; /* 1-8 leader format */ 20 u_char dl_network; /* 9-16 src/dest network */ 21 u_char dl_flags; /* 17-24 leader flags */ 22 u_char dl_mtype; /* 25-32 message type */ 23 u_char dl_htype; /* 33-40 handling type */ 24 u_char dl_host; /* 41-48 host number */ 25 u_short dl_imp; /* 49-64 imp field */ 26 u_char dl_link; /* 65-72 link number */ 27 u_char dl_subtype; /* 73-80 message subtype */ 28 }; 29 30 struct imp_leader { 31 struct control_leader il_dl; 32 #define il_format il_dl.dl_format 33 #define il_network il_dl.dl_network 34 #define il_flags il_dl.dl_flags 35 #define il_mtype il_dl.dl_mtype 36 #define il_htype il_dl.dl_htype 37 #define il_host il_dl.dl_host 38 #define il_imp il_dl.dl_imp 39 #define il_link il_dl.dl_link 40 #define il_subtype il_dl.dl_subtype 41 u_short il_length; /* message length */ 42 }; 43 44 #define IMP_MAXHOSTMSG 8 /* max messages in flight to a host */ 45 #define IMP_NOOPCNT 3 /* # of noops to send imp on reset */ 46 /* insure things are even... */ 47 #define IMPMTU ((8159 / NBBY) & ~01) 48 #define IMP_RCVBUF ((8159 / NBBY + 2) & ~01) 49 50 /* 51 * IMP-host flags 52 */ 53 #define IMP_1822L_H2I 0xd /* 1822L host-to-imp, 96-bit format */ 54 #define IMP_1822L_I2H 0xe /* 1822L imp-to-host, 96-bit format */ 55 #define IMP_NFF 0xf /* 96-bit (new) format */ 56 #define IMP_TRACE 0x8 /* trace message route */ 57 58 /* 59 * IMP-host message types. 60 */ 61 #define IMPTYPE_DATA 0 /* data for protocol */ 62 #define IMPTYPE_BADLEADER 1 /* leader error */ 63 #define IMPTYPE_DOWN 2 /* imp going down */ 64 #define IMPTYPE_NOOP 4 /* noop seen during initialization */ 65 #define IMPTYPE_RFNM 5 /* request for new messages */ 66 #define IMPTYPE_HOSTDEAD 6 /* host doesn't respond */ 67 #define IMPTYPE_HOSTUNREACH 7 /* host unreachable */ 68 #define IMPTYPE_BADDATA 8 /* data error */ 69 #define IMPTYPE_INCOMPLETE 9 /* incomplete message, send rest */ 70 #define IMPTYPE_RESET 10 /* reset complete */ 71 /* non-blocking IMP interface */ 72 #define IMPTYPE_RETRY 11 /* IMP refused, try again */ 73 #define IMPTYPE_NOTIFY 12 /* IMP refused, will notify */ 74 #define IMPTYPE_TRYING 13 /* IMP refused, still rexmt'ng */ 75 #define IMPTYPE_READY 14 /* ready for next message */ 76 77 /* 78 * IMPTYPE_DOWN subtypes, in link number field. 79 */ 80 #define IMP_DMASK 0x3 /* host going down mask */ 81 #define IMPDOWN_GOING 0 /* 30 secs */ 82 #define IMPDOWN_PM 1 /* hardware PM */ 83 #define IMPDOWN_RELOAD 2 /* software reload */ 84 #define IMPDOWN_RESTART 3 /* emergency restart */ 85 #define IMPDOWN_WHENMASK 0x3c /* mask for "how soon" */ 86 #define IMPDOWN_WHENSHIFT 2 /* shift for "how soon" */ 87 #define IMPDOWN_WHENUNIT 5 /* unit for "how soon", 5 min. */ 88 89 #define IMPTV_DOWN 30 /* going down timer 30 secs */ 90 91 #ifdef IMPMESSAGES 92 /* 93 * Messages from IMP regarding why 94 * it's going down. 95 */ 96 char *impmessage[] = { 97 "in 30 seconds", 98 "for hardware PM", 99 "to reload software", 100 "for emergency reset" 101 }; 102 #endif 103 104 /* 105 * IMPTYPE_BADLEADER subtypes. 106 */ 107 #define IMPLEADER_ERR 0 /* error flip-flop set */ 108 #define IMPLEADER_SHORT 1 /* leader < 80 bits */ 109 #define IMPLEADER_TYPE 2 /* illegal type field */ 110 #define IMPLEADER_OPPOSITE 3 /* opposite leader type */ 111 112 /* 113 * IMPTYPE_HOSTDEAD subtypes. 114 */ 115 #define IMPHOST_NORDY 1 /* ready-line negated */ 116 #define IMPHOST_TARDY 2 /* tardy receiving mesgs */ 117 #define IMPHOST_NOEXIST 3 /* NCC doesn't know host */ 118 #define IMPHOST_IMPSOFT 4 /* IMP software won't allow mesgs */ 119 #define IMPHOST_PM 5 /* host down for scheduled PM */ 120 #define IMPHOST_HARDSCHED 6 /* " " " " hardware work */ 121 #define IMPHOST_SOFTSCHED 7 /* " " " " software work */ 122 #define IMPHOST_RESTART 8 /* host down for emergency restart */ 123 #define IMPHOST_POWER 9 /* down because of power outage */ 124 #define IMPHOST_BREAKPOINT 10 /* host stopped at a breakpoint */ 125 #define IMPHOST_HARDWARE 11 /* hardware failure */ 126 #define IMPHOST_NOTUP 12 /* host not scheduled to be up */ 127 /* 13-14 currently unused */ 128 #define IMPHOST_COMINGUP 15 /* host in process of coming up */ 129 130 /* 131 * IMPTYPE_HOSTUNREACH subtypes. 132 */ 133 #define IMPREACH_IMP 0 /* destination IMP can't be reached */ 134 #define IMPREACH_HOSTUP 1 /* destination host isn't up */ 135 #define IMPREACH_LEADER 2 /* host doesn't support long leader */ 136 #define IMPREACH_PROHIBITED 3 /* communication is prohibited */ 137 138 /* 139 * IMPTYPE_INCOMPLETE subtypes. 140 */ 141 #define IMPCOMPLETE_SLOW 0 /* host didn't take data fast enough */ 142 #define IMPCOMPLETE_TOOLONG 1 /* message was too long */ 143 #define IMPCOMPLETE_TIMEOUT 2 /* mesg transmission time > 15 sec. */ 144 #define IMPCOMPLETE_FAILURE 3 /* IMP/circuit failure */ 145 #define IMPCOMPLETE_NOSPACE 4 /* no resources within 15 sec. */ 146 #define IMPCOMPLETE_IMPIO 5 /* src IMP I/O failure during receipt */ 147 148 /* 149 * IMPTYPE_RETRY subtypes. 150 */ 151 #define IMPRETRY_BUFFER 0 /* IMP buffer wasn't available */ 152 #define IMPRETRY_BLOCK 1 /* connection block unavailable */ 153 154 #define RFNMTIMER (120*PR_SLOWHZ) /* time to wait for RFNM for msg. */ 155 #define IMP_OTIMER (5*IFNET_SLOWHZ) /* max output time unless blocked */ 156 157 /* 158 * Data structure shared between IMP protocol module and hardware 159 * interface driver. Used to allow layering of IMP routines on top 160 * of varying device drivers. 161 */ 162 struct impcb { 163 int ic_hwunit; /* H/W unit number */ 164 char *ic_hwname; /* H/W type name */ 165 char ic_oactive; /* output in progress */ 166 int (*ic_init)(); /* hardware init routine */ 167 int (*ic_output)(); /* hardware output routine */ 168 int (*ic_down)(); /* hardware "drop ready" routine */ 169 }; 170 171 /* 172 * IMP software status per interface. 173 * (partially shared with the hardware specific module) 174 * 175 * Each interface is referenced by a network interface structure, 176 * imp_if, which the routing code uses to locate the interface. 177 * This structure contains the output queue for the interface, its 178 * address, ... IMP specific structures used in connecting the 179 * IMP software modules to the hardware specific interface routines 180 * are stored here. The common structures are made visible to the 181 * interface driver by passing a pointer to the hardware routine 182 * at "attach" time. 183 */ 184 struct imp_softc { 185 struct ifnet imp_if; /* network visible interface */ 186 struct impcb imp_cb; /* hooks to hardware module */ 187 int imp_state; /* current state of IMP */ 188 int imp_dropcnt; /* used during initialization */ 189 struct mbuf *imp_hosts; /* Head of host table hash chains. */ 190 struct mbuf *imp_hostq; /* current round-robin-output mark */ 191 u_int imp_hostent; /* current round-robin-output mark */ 192 int imp_msgready; /* number of messages ready to send */ 193 u_long imp_block; /* times imp blocked output */ 194 u_long imp_lostrfnm; /* rfnm's timed out */ 195 u_long imp_badrfnm; /* rfnm/incompl after timeout/bogus */ 196 u_long imp_incomplete; /* incomplete's received */ 197 u_long imp_garbage; /* bad messages received */ 198 }; 199 200 struct imp_softc *impattach(); 201 202 /* 203 * State of an IMP. 204 */ 205 #define IMPS_DOWN 0 /* unavailable, host not ready */ 206 #define IMPS_WINIT 1 /* imp not ready, waiting for init */ 207 #define IMPS_INIT 2 /* coming up */ 208 #define IMPS_UP 3 /* ready to go */ 209 #define IMPS_GOINGDOWN 4 /* been told we go down soon */ 210 211 #define IMPS_RUNNING(s) ((s) >= IMPS_UP) /* ready for messages */ 212 #define IMPS_IMPREADY(s) ((s) >= IMPS_INIT) /* IMP ready line on */ 213 214 #ifdef IMPLEADERS 215 char *impleaders[IMPTYPE_READY+1] = { 216 "DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD", 217 "HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY", 218 "NOTIFY", "TRYING", "READY" 219 }; 220 #endif 221