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 the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)if_imp.h 7.5 (Berkeley) 06/29/88 18 */ 19 20 /* 21 * Structure of IMP 1822 long leader. 22 */ 23 struct control_leader { 24 u_char dl_format; /* 1-8 leader format */ 25 u_char dl_network; /* 9-16 src/dest network */ 26 u_char dl_flags; /* 17-24 leader flags */ 27 u_char dl_mtype; /* 25-32 message type */ 28 u_char dl_htype; /* 33-40 handling type */ 29 u_char dl_host; /* 41-48 host number */ 30 u_short dl_imp; /* 49-64 imp field */ 31 u_char dl_link; /* 65-72 link number */ 32 u_char dl_subtype; /* 73-80 message subtype */ 33 }; 34 35 struct imp_leader { 36 struct control_leader il_dl; 37 #define il_format il_dl.dl_format 38 #define il_network il_dl.dl_network 39 #define il_flags il_dl.dl_flags 40 #define il_mtype il_dl.dl_mtype 41 #define il_htype il_dl.dl_htype 42 #define il_host il_dl.dl_host 43 #define il_imp il_dl.dl_imp 44 #define il_link il_dl.dl_link 45 #define il_subtype il_dl.dl_subtype 46 u_short il_length; /* message length */ 47 }; 48 49 #define IMP_MAXHOSTMSG 8 /* max messages in flight to a host */ 50 #define IMP_NOOPCNT 3 /* # of noops to send imp on reset */ 51 /* insure things are even... */ 52 #define IMPMTU ((8159 / NBBY) & ~01) 53 #define IMP_RCVBUF ((8159 / NBBY + 2) & ~01) 54 55 /* 56 * IMP-host flags 57 */ 58 #define IMP_1822L_H2I 0xd /* 1822L host-to-imp, 96-bit format */ 59 #define IMP_1822L_I2H 0xe /* 1822L imp-to-host, 96-bit format */ 60 #define IMP_NFF 0xf /* 96-bit (new) format */ 61 #define IMP_TRACE 0x8 /* trace message route */ 62 63 /* 64 * IMP-host message types. 65 */ 66 #define IMPTYPE_DATA 0 /* data for protocol */ 67 #define IMPTYPE_BADLEADER 1 /* leader error */ 68 #define IMPTYPE_DOWN 2 /* imp going down */ 69 #define IMPTYPE_NOOP 4 /* noop seen during initialization */ 70 #define IMPTYPE_RFNM 5 /* request for new messages */ 71 #define IMPTYPE_HOSTDEAD 6 /* host doesn't respond */ 72 #define IMPTYPE_HOSTUNREACH 7 /* host unreachable */ 73 #define IMPTYPE_BADDATA 8 /* data error */ 74 #define IMPTYPE_INCOMPLETE 9 /* incomplete message, send rest */ 75 #define IMPTYPE_RESET 10 /* reset complete */ 76 /* non-blocking IMP interface */ 77 #define IMPTYPE_RETRY 11 /* IMP refused, try again */ 78 #define IMPTYPE_NOTIFY 12 /* IMP refused, will notify */ 79 #define IMPTYPE_TRYING 13 /* IMP refused, still rexmt'ng */ 80 #define IMPTYPE_READY 14 /* ready for next message */ 81 82 /* 83 * IMPTYPE_DOWN subtypes, in link number field. 84 */ 85 #define IMP_DMASK 0x3 /* host going down mask */ 86 #define IMPDOWN_GOING 0 /* 30 secs */ 87 #define IMPDOWN_PM 1 /* hardware PM */ 88 #define IMPDOWN_RELOAD 2 /* software reload */ 89 #define IMPDOWN_RESTART 3 /* emergency restart */ 90 #define IMPDOWN_WHENMASK 0x3c /* mask for "how soon" */ 91 #define IMPDOWN_WHENSHIFT 2 /* shift for "how soon" */ 92 #define IMPDOWN_WHENUNIT 5 /* unit for "how soon", 5 min. */ 93 94 #define IMPTV_DOWN 30 /* going down timer 30 secs */ 95 96 #ifdef IMPMESSAGES 97 /* 98 * Messages from IMP regarding why 99 * it's going down. 100 */ 101 char *impmessage[] = { 102 "in 30 seconds", 103 "for hardware PM", 104 "to reload software", 105 "for emergency reset" 106 }; 107 #endif 108 109 /* 110 * IMPTYPE_BADLEADER subtypes. 111 */ 112 #define IMPLEADER_ERR 0 /* error flip-flop set */ 113 #define IMPLEADER_SHORT 1 /* leader < 80 bits */ 114 #define IMPLEADER_TYPE 2 /* illegal type field */ 115 #define IMPLEADER_OPPOSITE 3 /* opposite leader type */ 116 117 /* 118 * IMPTYPE_HOSTDEAD subtypes. 119 */ 120 #define IMPHOST_NORDY 1 /* ready-line negated */ 121 #define IMPHOST_TARDY 2 /* tardy receiving mesgs */ 122 #define IMPHOST_NOEXIST 3 /* NCC doesn't know host */ 123 #define IMPHOST_IMPSOFT 4 /* IMP software won't allow mesgs */ 124 #define IMPHOST_PM 5 /* host down for scheduled PM */ 125 #define IMPHOST_HARDSCHED 6 /* " " " " hardware work */ 126 #define IMPHOST_SOFTSCHED 7 /* " " " " software work */ 127 #define IMPHOST_RESTART 8 /* host down for emergency restart */ 128 #define IMPHOST_POWER 9 /* down because of power outage */ 129 #define IMPHOST_BREAKPOINT 10 /* host stopped at a breakpoint */ 130 #define IMPHOST_HARDWARE 11 /* hardware failure */ 131 #define IMPHOST_NOTUP 12 /* host not scheduled to be up */ 132 /* 13-14 currently unused */ 133 #define IMPHOST_COMINGUP 15 /* host in process of coming up */ 134 135 /* 136 * IMPTYPE_HOSTUNREACH subtypes. 137 */ 138 #define IMPREACH_IMP 0 /* destination IMP can't be reached */ 139 #define IMPREACH_HOSTUP 1 /* destination host isn't up */ 140 #define IMPREACH_LEADER 2 /* host doesn't support long leader */ 141 #define IMPREACH_PROHIBITED 3 /* communication is prohibited */ 142 143 /* 144 * IMPTYPE_INCOMPLETE subtypes. 145 */ 146 #define IMPCOMPLETE_SLOW 0 /* host didn't take data fast enough */ 147 #define IMPCOMPLETE_TOOLONG 1 /* message was too long */ 148 #define IMPCOMPLETE_TIMEOUT 2 /* mesg transmission time > 15 sec. */ 149 #define IMPCOMPLETE_FAILURE 3 /* IMP/circuit failure */ 150 #define IMPCOMPLETE_NOSPACE 4 /* no resources within 15 sec. */ 151 #define IMPCOMPLETE_IMPIO 5 /* src IMP I/O failure during receipt */ 152 153 /* 154 * IMPTYPE_RETRY subtypes. 155 */ 156 #define IMPRETRY_BUFFER 0 /* IMP buffer wasn't available */ 157 #define IMPRETRY_BLOCK 1 /* connection block unavailable */ 158 159 #define RFNMTIMER (120*PR_SLOWHZ) /* time to wait for RFNM for msg. */ 160 #define IMP_OTIMER (5*IFNET_SLOWHZ) /* max output time unless blocked */ 161 162 /* 163 * Data structure shared between IMP protocol module and hardware 164 * interface driver. Used to allow layering of IMP routines on top 165 * of varying device drivers. 166 */ 167 struct impcb { 168 int ic_hwunit; /* H/W unit number */ 169 char *ic_hwname; /* H/W type name */ 170 char ic_oactive; /* output in progress */ 171 int (*ic_init)(); /* hardware init routine */ 172 int (*ic_output)(); /* hardware output routine */ 173 int (*ic_down)(); /* hardware "drop ready" routine */ 174 }; 175 176 /* 177 * IMP software status per interface. 178 * (partially shared with the hardware specific module) 179 * 180 * Each interface is referenced by a network interface structure, 181 * imp_if, which the routing code uses to locate the interface. 182 * This structure contains the output queue for the interface, its 183 * address, ... IMP specific structures used in connecting the 184 * IMP software modules to the hardware specific interface routines 185 * are stored here. The common structures are made visible to the 186 * interface driver by passing a pointer to the hardware routine 187 * at "attach" time. 188 */ 189 struct imp_softc { 190 struct ifnet imp_if; /* network visible interface */ 191 struct impcb imp_cb; /* hooks to hardware module */ 192 int imp_state; /* current state of IMP */ 193 int imp_dropcnt; /* used during initialization */ 194 struct mbuf *imp_hosts; /* Head of host table hash chains. */ 195 struct mbuf *imp_hostq; /* current round-robin-output mark */ 196 u_int imp_hostent; /* current round-robin-output mark */ 197 int imp_msgready; /* number of messages ready to send */ 198 u_long imp_block; /* times imp blocked output */ 199 u_long imp_lostrfnm; /* rfnm's timed out */ 200 u_long imp_badrfnm; /* rfnm/incompl after timeout/bogus */ 201 u_long imp_incomplete; /* incomplete's received */ 202 u_long imp_garbage; /* bad messages received */ 203 }; 204 205 struct imp_softc *impattach(); 206 207 /* 208 * State of an IMP. 209 */ 210 #define IMPS_DOWN 0 /* unavailable, host not ready */ 211 #define IMPS_WINIT 1 /* imp not ready, waiting for init */ 212 #define IMPS_INIT 2 /* coming up */ 213 #define IMPS_UP 3 /* ready to go */ 214 #define IMPS_GOINGDOWN 4 /* been told we go down soon */ 215 216 #define IMPS_RUNNING(s) ((s) >= IMPS_UP) /* ready for messages */ 217 #define IMPS_IMPREADY(s) ((s) >= IMPS_INIT) /* IMP ready line on */ 218 219 #ifdef IMPLEADERS 220 char *impleaders[IMPTYPE_READY+1] = { 221 "DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD", 222 "HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY", 223 "NOTIFY", "TRYING", "READY" 224 }; 225 #endif 226