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1.1 root 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) 6/29/88
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
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