1 /* 2 * Copyright (c) 1982, 1986, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)if_imp.h 7.7 (Berkeley) 06/28/90 8 */ 9 10 /* 11 * Structure of IMP 1822 long leader. 12 */ 13 struct control_leader { 14 u_char dl_format; /* 1-8 leader format */ 15 u_char dl_network; /* 9-16 src/dest network */ 16 u_char dl_flags; /* 17-24 leader flags */ 17 u_char dl_mtype; /* 25-32 message type */ 18 u_char dl_htype; /* 33-40 handling type */ 19 u_char dl_host; /* 41-48 host number */ 20 u_short dl_imp; /* 49-64 imp field */ 21 u_char dl_link; /* 65-72 link number */ 22 u_char dl_subtype; /* 73-80 message subtype */ 23 }; 24 25 struct imp_leader { 26 struct control_leader il_dl; 27 #define il_format il_dl.dl_format 28 #define il_network il_dl.dl_network 29 #define il_flags il_dl.dl_flags 30 #define il_mtype il_dl.dl_mtype 31 #define il_htype il_dl.dl_htype 32 #define il_host il_dl.dl_host 33 #define il_imp il_dl.dl_imp 34 #define il_link il_dl.dl_link 35 #define il_subtype il_dl.dl_subtype 36 u_short il_length; /* message length */ 37 }; 38 39 #define IMP_MAXHOSTMSG 8 /* max messages in flight to a host */ 40 #define IMP_NOOPCNT 3 /* # of noops to send imp on reset */ 41 /* insure things are even... */ 42 #define IMPMTU ((8159 / NBBY) & ~01) 43 #define IMP_RCVBUF ((8159 / NBBY + 2) & ~01) 44 45 /* 46 * IMP-host flags 47 */ 48 #define IMP_1822L_H2I 0xd /* 1822L host-to-imp, 96-bit format */ 49 #define IMP_1822L_I2H 0xe /* 1822L imp-to-host, 96-bit format */ 50 #define IMP_NFF 0xf /* 96-bit (new) format */ 51 #define IMP_TRACE 0x8 /* trace message route */ 52 53 /* 54 * IMP-host message types. 55 */ 56 #define IMPTYPE_DATA 0 /* data for protocol */ 57 #define IMPTYPE_BADLEADER 1 /* leader error */ 58 #define IMPTYPE_DOWN 2 /* imp going down */ 59 #define IMPTYPE_NOOP 4 /* noop seen during initialization */ 60 #define IMPTYPE_RFNM 5 /* request for new messages */ 61 #define IMPTYPE_HOSTDEAD 6 /* host doesn't respond */ 62 #define IMPTYPE_HOSTUNREACH 7 /* host unreachable */ 63 #define IMPTYPE_BADDATA 8 /* data error */ 64 #define IMPTYPE_INCOMPLETE 9 /* incomplete message, send rest */ 65 #define IMPTYPE_RESET 10 /* reset complete */ 66 /* non-blocking IMP interface */ 67 #define IMPTYPE_RETRY 11 /* IMP refused, try again */ 68 #define IMPTYPE_NOTIFY 12 /* IMP refused, will notify */ 69 #define IMPTYPE_TRYING 13 /* IMP refused, still rexmt'ng */ 70 #define IMPTYPE_READY 14 /* ready for next message */ 71 72 /* 73 * Link numbers 74 */ 75 #define IMPLINK_IP 155 76 #define IMPLINK_LOWEXPER 156 77 #define IMPLINK_HIGHEXPER 158 78 79 /* 80 * IMPTYPE_DOWN subtypes, in link number field. 81 */ 82 #define IMP_DMASK 0x3 /* host going down mask */ 83 #define IMPDOWN_GOING 0 /* 30 secs */ 84 #define IMPDOWN_PM 1 /* hardware PM */ 85 #define IMPDOWN_RELOAD 2 /* software reload */ 86 #define IMPDOWN_RESTART 3 /* emergency restart */ 87 #define IMPDOWN_WHENMASK 0x3c /* mask for "how soon" */ 88 #define IMPDOWN_WHENSHIFT 2 /* shift for "how soon" */ 89 #define IMPDOWN_WHENUNIT 5 /* unit for "how soon", 5 min. */ 90 91 #define IMPTV_DOWN 30 /* going down timer 30 secs */ 92 93 #ifdef IMPMESSAGES 94 /* 95 * Messages from IMP regarding why 96 * it's going down. 97 */ 98 char *impmessage[] = { 99 "in 30 seconds", 100 "for hardware PM", 101 "to reload software", 102 "for emergency reset" 103 }; 104 #endif 105 106 /* 107 * IMPTYPE_BADLEADER subtypes. 108 */ 109 #define IMPLEADER_ERR 0 /* error flip-flop set */ 110 #define IMPLEADER_SHORT 1 /* leader < 80 bits */ 111 #define IMPLEADER_TYPE 2 /* illegal type field */ 112 #define IMPLEADER_OPPOSITE 3 /* opposite leader type */ 113 114 /* 115 * IMPTYPE_HOSTDEAD subtypes. 116 */ 117 #define IMPHOST_NORDY 1 /* ready-line negated */ 118 #define IMPHOST_TARDY 2 /* tardy receiving mesgs */ 119 #define IMPHOST_NOEXIST 3 /* NCC doesn't know host */ 120 #define IMPHOST_IMPSOFT 4 /* IMP software won't allow mesgs */ 121 #define IMPHOST_PM 5 /* host down for scheduled PM */ 122 #define IMPHOST_HARDSCHED 6 /* " " " " hardware work */ 123 #define IMPHOST_SOFTSCHED 7 /* " " " " software work */ 124 #define IMPHOST_RESTART 8 /* host down for emergency restart */ 125 #define IMPHOST_POWER 9 /* down because of power outage */ 126 #define IMPHOST_BREAKPOINT 10 /* host stopped at a breakpoint */ 127 #define IMPHOST_HARDWARE 11 /* hardware failure */ 128 #define IMPHOST_NOTUP 12 /* host not scheduled to be up */ 129 /* 13-14 currently unused */ 130 #define IMPHOST_COMINGUP 15 /* host in process of coming up */ 131 132 /* 133 * IMPTYPE_HOSTUNREACH subtypes. 134 */ 135 #define IMPREACH_IMP 0 /* destination IMP can't be reached */ 136 #define IMPREACH_HOSTUP 1 /* destination host isn't up */ 137 #define IMPREACH_LEADER 2 /* host doesn't support long leader */ 138 #define IMPREACH_PROHIBITED 3 /* communication is prohibited */ 139 140 /* 141 * IMPTYPE_INCOMPLETE subtypes. 142 */ 143 #define IMPCOMPLETE_SLOW 0 /* host didn't take data fast enough */ 144 #define IMPCOMPLETE_TOOLONG 1 /* message was too long */ 145 #define IMPCOMPLETE_TIMEOUT 2 /* mesg transmission time > 15 sec. */ 146 #define IMPCOMPLETE_FAILURE 3 /* IMP/circuit failure */ 147 #define IMPCOMPLETE_NOSPACE 4 /* no resources within 15 sec. */ 148 #define IMPCOMPLETE_IMPIO 5 /* src IMP I/O failure during receipt */ 149 150 /* 151 * IMPTYPE_RETRY subtypes. 152 */ 153 #define IMPRETRY_BUFFER 0 /* IMP buffer wasn't available */ 154 #define IMPRETRY_BLOCK 1 /* connection block unavailable */ 155 156 #define RFNMTIMER (120*PR_SLOWHZ) /* time to wait for RFNM for msg. */ 157 #define IMP_OTIMER (5*IFNET_SLOWHZ) /* max output time unless blocked */ 158 159 /* 160 * Data structure shared between IMP protocol module and hardware 161 * interface driver. Used to allow layering of IMP routines on top 162 * of varying device drivers. 163 */ 164 struct impcb { 165 int ic_hwunit; /* H/W unit number */ 166 char *ic_hwname; /* H/W type name */ 167 char ic_oactive; /* output in progress */ 168 int (*ic_init)(); /* hardware init routine */ 169 int (*ic_output)(); /* hardware output routine */ 170 int (*ic_down)(); /* hardware "drop ready" routine */ 171 }; 172 173 /* 174 * IMP software status per interface. 175 * (partially shared with the hardware specific module) 176 * 177 * Each interface is referenced by a network interface structure, 178 * imp_if, which the routing code uses to locate the interface. 179 * This structure contains the output queue for the interface, its 180 * address, ... IMP specific structures used in connecting the 181 * IMP software modules to the hardware specific interface routines 182 * are stored here. The common structures are made visible to the 183 * interface driver by passing a pointer to the hardware routine 184 * at "attach" time. 185 */ 186 struct imp_softc { 187 struct ifnet imp_if; /* network visible interface */ 188 struct impcb imp_cb; /* hooks to hardware module */ 189 int imp_state; /* current state of IMP */ 190 int imp_dropcnt; /* used during initialization */ 191 struct mbuf *imp_hosts; /* Head of host table hash chains. */ 192 struct mbuf *imp_hostq; /* current round-robin-output mark */ 193 u_int imp_hostent; /* current round-robin-output mark */ 194 int imp_msgready; /* number of messages ready to send */ 195 u_long imp_block; /* times imp blocked output */ 196 u_long imp_lostrfnm; /* rfnm's timed out */ 197 u_long imp_badrfnm; /* rfnm/incompl after timeout/bogus */ 198 u_long imp_incomplete; /* incomplete's received */ 199 u_long imp_garbage; /* bad messages received */ 200 }; 201 202 struct imp_softc *impattach(); 203 204 /* 205 * State of an IMP. 206 */ 207 #define IMPS_DOWN 0 /* unavailable, host not ready */ 208 #define IMPS_WINIT 1 /* imp not ready, waiting for init */ 209 #define IMPS_INIT 2 /* coming up */ 210 #define IMPS_UP 3 /* ready to go */ 211 #define IMPS_GOINGDOWN 4 /* been told we go down soon */ 212 213 #define IMPS_RUNNING(s) ((s) >= IMPS_UP) /* ready for messages */ 214 #define IMPS_IMPREADY(s) ((s) >= IMPS_INIT) /* IMP ready line on */ 215 216 #ifdef IMPLEADERS 217 char *impleaders[IMPTYPE_READY+1] = { 218 "DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD", 219 "HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY", 220 "NOTIFY", "TRYING", "READY" 221 }; 222 #endif 223