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- /*
- * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)if_imp.h 7.7 (Berkeley) 6/28/90
- */
-
- /*
- * Structure of IMP 1822 long leader.
- */
- struct control_leader {
- u_char dl_format; /* 1-8 leader format */
- u_char dl_network; /* 9-16 src/dest network */
- u_char dl_flags; /* 17-24 leader flags */
- u_char dl_mtype; /* 25-32 message type */
- u_char dl_htype; /* 33-40 handling type */
- u_char dl_host; /* 41-48 host number */
- u_short dl_imp; /* 49-64 imp field */
- u_char dl_link; /* 65-72 link number */
- u_char dl_subtype; /* 73-80 message subtype */
- };
-
- struct imp_leader {
- struct control_leader il_dl;
- #define il_format il_dl.dl_format
- #define il_network il_dl.dl_network
- #define il_flags il_dl.dl_flags
- #define il_mtype il_dl.dl_mtype
- #define il_htype il_dl.dl_htype
- #define il_host il_dl.dl_host
- #define il_imp il_dl.dl_imp
- #define il_link il_dl.dl_link
- #define il_subtype il_dl.dl_subtype
- u_short il_length; /* message length */
- };
-
- #define IMP_MAXHOSTMSG 8 /* max messages in flight to a host */
- #define IMP_NOOPCNT 3 /* # of noops to send imp on reset */
- /* insure things are even... */
- #define IMPMTU ((8159 / NBBY) & ~01)
- #define IMP_RCVBUF ((8159 / NBBY + 2) & ~01)
-
- /*
- * IMP-host flags
- */
- #define IMP_1822L_H2I 0xd /* 1822L host-to-imp, 96-bit format */
- #define IMP_1822L_I2H 0xe /* 1822L imp-to-host, 96-bit format */
- #define IMP_NFF 0xf /* 96-bit (new) format */
- #define IMP_TRACE 0x8 /* trace message route */
-
- /*
- * IMP-host message types.
- */
- #define IMPTYPE_DATA 0 /* data for protocol */
- #define IMPTYPE_BADLEADER 1 /* leader error */
- #define IMPTYPE_DOWN 2 /* imp going down */
- #define IMPTYPE_NOOP 4 /* noop seen during initialization */
- #define IMPTYPE_RFNM 5 /* request for new messages */
- #define IMPTYPE_HOSTDEAD 6 /* host doesn't respond */
- #define IMPTYPE_HOSTUNREACH 7 /* host unreachable */
- #define IMPTYPE_BADDATA 8 /* data error */
- #define IMPTYPE_INCOMPLETE 9 /* incomplete message, send rest */
- #define IMPTYPE_RESET 10 /* reset complete */
- /* non-blocking IMP interface */
- #define IMPTYPE_RETRY 11 /* IMP refused, try again */
- #define IMPTYPE_NOTIFY 12 /* IMP refused, will notify */
- #define IMPTYPE_TRYING 13 /* IMP refused, still rexmt'ng */
- #define IMPTYPE_READY 14 /* ready for next message */
-
- /*
- * Link numbers
- */
- #define IMPLINK_IP 155
- #define IMPLINK_LOWEXPER 156
- #define IMPLINK_HIGHEXPER 158
-
- /*
- * IMPTYPE_DOWN subtypes, in link number field.
- */
- #define IMP_DMASK 0x3 /* host going down mask */
- #define IMPDOWN_GOING 0 /* 30 secs */
- #define IMPDOWN_PM 1 /* hardware PM */
- #define IMPDOWN_RELOAD 2 /* software reload */
- #define IMPDOWN_RESTART 3 /* emergency restart */
- #define IMPDOWN_WHENMASK 0x3c /* mask for "how soon" */
- #define IMPDOWN_WHENSHIFT 2 /* shift for "how soon" */
- #define IMPDOWN_WHENUNIT 5 /* unit for "how soon", 5 min. */
-
- #define IMPTV_DOWN 30 /* going down timer 30 secs */
-
- #ifdef IMPMESSAGES
- /*
- * Messages from IMP regarding why
- * it's going down.
- */
- char *impmessage[] = {
- "in 30 seconds",
- "for hardware PM",
- "to reload software",
- "for emergency reset"
- };
- #endif
-
- /*
- * IMPTYPE_BADLEADER subtypes.
- */
- #define IMPLEADER_ERR 0 /* error flip-flop set */
- #define IMPLEADER_SHORT 1 /* leader < 80 bits */
- #define IMPLEADER_TYPE 2 /* illegal type field */
- #define IMPLEADER_OPPOSITE 3 /* opposite leader type */
-
- /*
- * IMPTYPE_HOSTDEAD subtypes.
- */
- #define IMPHOST_NORDY 1 /* ready-line negated */
- #define IMPHOST_TARDY 2 /* tardy receiving mesgs */
- #define IMPHOST_NOEXIST 3 /* NCC doesn't know host */
- #define IMPHOST_IMPSOFT 4 /* IMP software won't allow mesgs */
- #define IMPHOST_PM 5 /* host down for scheduled PM */
- #define IMPHOST_HARDSCHED 6 /* " " " " hardware work */
- #define IMPHOST_SOFTSCHED 7 /* " " " " software work */
- #define IMPHOST_RESTART 8 /* host down for emergency restart */
- #define IMPHOST_POWER 9 /* down because of power outage */
- #define IMPHOST_BREAKPOINT 10 /* host stopped at a breakpoint */
- #define IMPHOST_HARDWARE 11 /* hardware failure */
- #define IMPHOST_NOTUP 12 /* host not scheduled to be up */
- /* 13-14 currently unused */
- #define IMPHOST_COMINGUP 15 /* host in process of coming up */
-
- /*
- * IMPTYPE_HOSTUNREACH subtypes.
- */
- #define IMPREACH_IMP 0 /* destination IMP can't be reached */
- #define IMPREACH_HOSTUP 1 /* destination host isn't up */
- #define IMPREACH_LEADER 2 /* host doesn't support long leader */
- #define IMPREACH_PROHIBITED 3 /* communication is prohibited */
-
- /*
- * IMPTYPE_INCOMPLETE subtypes.
- */
- #define IMPCOMPLETE_SLOW 0 /* host didn't take data fast enough */
- #define IMPCOMPLETE_TOOLONG 1 /* message was too long */
- #define IMPCOMPLETE_TIMEOUT 2 /* mesg transmission time > 15 sec. */
- #define IMPCOMPLETE_FAILURE 3 /* IMP/circuit failure */
- #define IMPCOMPLETE_NOSPACE 4 /* no resources within 15 sec. */
- #define IMPCOMPLETE_IMPIO 5 /* src IMP I/O failure during receipt */
-
- /*
- * IMPTYPE_RETRY subtypes.
- */
- #define IMPRETRY_BUFFER 0 /* IMP buffer wasn't available */
- #define IMPRETRY_BLOCK 1 /* connection block unavailable */
-
- #define RFNMTIMER (120*PR_SLOWHZ) /* time to wait for RFNM for msg. */
- #define IMP_OTIMER (5*IFNET_SLOWHZ) /* max output time unless blocked */
-
- /*
- * Data structure shared between IMP protocol module and hardware
- * interface driver. Used to allow layering of IMP routines on top
- * of varying device drivers.
- */
- struct impcb {
- int ic_hwunit; /* H/W unit number */
- char *ic_hwname; /* H/W type name */
- char ic_oactive; /* output in progress */
- int (*ic_init)(); /* hardware init routine */
- int (*ic_output)(); /* hardware output routine */
- int (*ic_down)(); /* hardware "drop ready" routine */
- };
-
- /*
- * IMP software status per interface.
- * (partially shared with the hardware specific module)
- *
- * Each interface is referenced by a network interface structure,
- * imp_if, which the routing code uses to locate the interface.
- * This structure contains the output queue for the interface, its
- * address, ... IMP specific structures used in connecting the
- * IMP software modules to the hardware specific interface routines
- * are stored here. The common structures are made visible to the
- * interface driver by passing a pointer to the hardware routine
- * at "attach" time.
- */
- struct imp_softc {
- struct ifnet imp_if; /* network visible interface */
- struct impcb imp_cb; /* hooks to hardware module */
- int imp_state; /* current state of IMP */
- int imp_dropcnt; /* used during initialization */
- struct mbuf *imp_hosts; /* Head of host table hash chains. */
- struct mbuf *imp_hostq; /* current round-robin-output mark */
- u_int imp_hostent; /* current round-robin-output mark */
- int imp_msgready; /* number of messages ready to send */
- u_long imp_block; /* times imp blocked output */
- u_long imp_lostrfnm; /* rfnm's timed out */
- u_long imp_badrfnm; /* rfnm/incompl after timeout/bogus */
- u_long imp_incomplete; /* incomplete's received */
- u_long imp_garbage; /* bad messages received */
- };
-
- struct imp_softc *impattach();
-
- /*
- * State of an IMP.
- */
- #define IMPS_DOWN 0 /* unavailable, host not ready */
- #define IMPS_WINIT 1 /* imp not ready, waiting for init */
- #define IMPS_INIT 2 /* coming up */
- #define IMPS_UP 3 /* ready to go */
- #define IMPS_GOINGDOWN 4 /* been told we go down soon */
-
- #define IMPS_RUNNING(s) ((s) >= IMPS_UP) /* ready for messages */
- #define IMPS_IMPREADY(s) ((s) >= IMPS_INIT) /* IMP ready line on */
-
- #ifdef IMPLEADERS
- char *impleaders[IMPTYPE_READY+1] = {
- "DATA", "BADLEADER", "DOWN", "bad", "NOOP", "RFNM", "HOSTDEAD",
- "HOSTUNREACH", "BADDATA", "INCOMPLETE", "RESET", "RETRY",
- "NOTIFY", "TRYING", "READY"
- };
- #endif
-